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authorAbhijeet Joglekar <abjoglek@cisco.com>2009-04-17 21:33:26 -0400
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-05-13 22:13:09 -0400
commit5df6d737dd4b0fe9eccf943abb3677cfea05a6c4 (patch)
treed3f6bf84dacb80c253743b45da4ecac2dcca4ec6 /drivers/scsi
parent210af919c949a7d6bd330916ef376cec2907d81e (diff)
[SCSI] fnic: Add new Cisco PCI-Express FCoE HBA
fnic is a driver for the Cisco PCI-Express FCoE HBA Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/Kconfig11
-rw-r--r--drivers/scsi/Makefile1
-rw-r--r--drivers/scsi/fnic/Makefile15
-rw-r--r--drivers/scsi/fnic/cq_desc.h78
-rw-r--r--drivers/scsi/fnic/cq_enet_desc.h167
-rw-r--r--drivers/scsi/fnic/cq_exch_desc.h182
-rw-r--r--drivers/scsi/fnic/fcpio.h780
-rw-r--r--drivers/scsi/fnic/fnic.h265
-rw-r--r--drivers/scsi/fnic/fnic_attrs.c56
-rw-r--r--drivers/scsi/fnic/fnic_fcs.c742
-rw-r--r--drivers/scsi/fnic/fnic_io.h67
-rw-r--r--drivers/scsi/fnic/fnic_isr.c332
-rw-r--r--drivers/scsi/fnic/fnic_main.c942
-rw-r--r--drivers/scsi/fnic/fnic_res.c444
-rw-r--r--drivers/scsi/fnic/fnic_res.h197
-rw-r--r--drivers/scsi/fnic/fnic_scsi.c1850
-rw-r--r--drivers/scsi/fnic/rq_enet_desc.h58
-rw-r--r--drivers/scsi/fnic/vnic_cq.c85
-rw-r--r--drivers/scsi/fnic/vnic_cq.h121
-rw-r--r--drivers/scsi/fnic/vnic_cq_copy.h62
-rw-r--r--drivers/scsi/fnic/vnic_dev.c690
-rw-r--r--drivers/scsi/fnic/vnic_dev.h161
-rw-r--r--drivers/scsi/fnic/vnic_devcmd.h281
-rw-r--r--drivers/scsi/fnic/vnic_intr.c60
-rw-r--r--drivers/scsi/fnic/vnic_intr.h118
-rw-r--r--drivers/scsi/fnic/vnic_nic.h69
-rw-r--r--drivers/scsi/fnic/vnic_resource.h61
-rw-r--r--drivers/scsi/fnic/vnic_rq.c196
-rw-r--r--drivers/scsi/fnic/vnic_rq.h235
-rw-r--r--drivers/scsi/fnic/vnic_scsi.h99
-rw-r--r--drivers/scsi/fnic/vnic_stats.h68
-rw-r--r--drivers/scsi/fnic/vnic_wq.c182
-rw-r--r--drivers/scsi/fnic/vnic_wq.h175
-rw-r--r--drivers/scsi/fnic/vnic_wq_copy.c117
-rw-r--r--drivers/scsi/fnic/vnic_wq_copy.h128
-rw-r--r--drivers/scsi/fnic/wq_enet_desc.h96
36 files changed, 9191 insertions, 0 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 8ed2990c826e..fb2740789b68 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -628,6 +628,17 @@ config FCOE
628 ---help--- 628 ---help---
629 Fibre Channel over Ethernet module 629 Fibre Channel over Ethernet module
630 630
631config FCOE_FNIC
632 tristate "Cisco FNIC Driver"
633 depends on PCI && X86
634 select LIBFC
635 help
636 This is support for the Cisco PCI-Express FCoE HBA.
637
638 To compile this driver as a module, choose M here and read
639 <file:Documentation/scsi/scsi.txt>.
640 The module will be called fnic.
641
631config SCSI_DMX3191D 642config SCSI_DMX3191D
632 tristate "DMX3191D SCSI support" 643 tristate "DMX3191D SCSI support"
633 depends on PCI && SCSI 644 depends on PCI && SCSI
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index e7c861ac417d..a5049cfb40ed 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_SCSI_DH) += device_handler/
39obj-$(CONFIG_LIBFC) += libfc/ 39obj-$(CONFIG_LIBFC) += libfc/
40obj-$(CONFIG_LIBFCOE) += fcoe/ 40obj-$(CONFIG_LIBFCOE) += fcoe/
41obj-$(CONFIG_FCOE) += fcoe/ 41obj-$(CONFIG_FCOE) += fcoe/
42obj-$(CONFIG_FCOE_FNIC) += fnic/
42obj-$(CONFIG_ISCSI_TCP) += libiscsi.o libiscsi_tcp.o iscsi_tcp.o 43obj-$(CONFIG_ISCSI_TCP) += libiscsi.o libiscsi_tcp.o iscsi_tcp.o
43obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o 44obj-$(CONFIG_INFINIBAND_ISER) += libiscsi.o
44obj-$(CONFIG_SCSI_A4000T) += 53c700.o a4000t.o 45obj-$(CONFIG_SCSI_A4000T) += 53c700.o a4000t.o
diff --git a/drivers/scsi/fnic/Makefile b/drivers/scsi/fnic/Makefile
new file mode 100644
index 000000000000..37c3440bc17c
--- /dev/null
+++ b/drivers/scsi/fnic/Makefile
@@ -0,0 +1,15 @@
1obj-$(CONFIG_FCOE_FNIC) += fnic.o
2
3fnic-y := \
4 fnic_attrs.o \
5 fnic_isr.o \
6 fnic_main.o \
7 fnic_res.o \
8 fnic_fcs.o \
9 fnic_scsi.o \
10 vnic_cq.o \
11 vnic_dev.o \
12 vnic_intr.o \
13 vnic_rq.o \
14 vnic_wq_copy.o \
15 vnic_wq.o
diff --git a/drivers/scsi/fnic/cq_desc.h b/drivers/scsi/fnic/cq_desc.h
new file mode 100644
index 000000000000..d1225cf6320e
--- /dev/null
+++ b/drivers/scsi/fnic/cq_desc.h
@@ -0,0 +1,78 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _CQ_DESC_H_
19#define _CQ_DESC_H_
20
21/*
22 * Completion queue descriptor types
23 */
24enum cq_desc_types {
25 CQ_DESC_TYPE_WQ_ENET = 0,
26 CQ_DESC_TYPE_DESC_COPY = 1,
27 CQ_DESC_TYPE_WQ_EXCH = 2,
28 CQ_DESC_TYPE_RQ_ENET = 3,
29 CQ_DESC_TYPE_RQ_FCP = 4,
30};
31
32/* Completion queue descriptor: 16B
33 *
34 * All completion queues have this basic layout. The
35 * type_specfic area is unique for each completion
36 * queue type.
37 */
38struct cq_desc {
39 __le16 completed_index;
40 __le16 q_number;
41 u8 type_specfic[11];
42 u8 type_color;
43};
44
45#define CQ_DESC_TYPE_BITS 4
46#define CQ_DESC_TYPE_MASK ((1 << CQ_DESC_TYPE_BITS) - 1)
47#define CQ_DESC_COLOR_MASK 1
48#define CQ_DESC_COLOR_SHIFT 7
49#define CQ_DESC_Q_NUM_BITS 10
50#define CQ_DESC_Q_NUM_MASK ((1 << CQ_DESC_Q_NUM_BITS) - 1)
51#define CQ_DESC_COMP_NDX_BITS 12
52#define CQ_DESC_COMP_NDX_MASK ((1 << CQ_DESC_COMP_NDX_BITS) - 1)
53
54static inline void cq_desc_dec(const struct cq_desc *desc_arg,
55 u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
56{
57 const struct cq_desc *desc = desc_arg;
58 const u8 type_color = desc->type_color;
59
60 *color = (type_color >> CQ_DESC_COLOR_SHIFT) & CQ_DESC_COLOR_MASK;
61
62 /*
63 * Make sure color bit is read from desc *before* other fields
64 * are read from desc. Hardware guarantees color bit is last
65 * bit (byte) written. Adding the rmb() prevents the compiler
66 * and/or CPU from reordering the reads which would potentially
67 * result in reading stale values.
68 */
69
70 rmb();
71
72 *type = type_color & CQ_DESC_TYPE_MASK;
73 *q_number = le16_to_cpu(desc->q_number) & CQ_DESC_Q_NUM_MASK;
74 *completed_index = le16_to_cpu(desc->completed_index) &
75 CQ_DESC_COMP_NDX_MASK;
76}
77
78#endif /* _CQ_DESC_H_ */
diff --git a/drivers/scsi/fnic/cq_enet_desc.h b/drivers/scsi/fnic/cq_enet_desc.h
new file mode 100644
index 000000000000..a9fa26f82ddd
--- /dev/null
+++ b/drivers/scsi/fnic/cq_enet_desc.h
@@ -0,0 +1,167 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _CQ_ENET_DESC_H_
19#define _CQ_ENET_DESC_H_
20
21#include "cq_desc.h"
22
23/* Ethernet completion queue descriptor: 16B */
24struct cq_enet_wq_desc {
25 __le16 completed_index;
26 __le16 q_number;
27 u8 reserved[11];
28 u8 type_color;
29};
30
31static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
32 u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
33{
34 cq_desc_dec((struct cq_desc *)desc, type,
35 color, q_number, completed_index);
36}
37
38/* Completion queue descriptor: Ethernet receive queue, 16B */
39struct cq_enet_rq_desc {
40 __le16 completed_index_flags;
41 __le16 q_number_rss_type_flags;
42 __le32 rss_hash;
43 __le16 bytes_written_flags;
44 __le16 vlan;
45 __le16 checksum_fcoe;
46 u8 flags;
47 u8 type_color;
48};
49
50#define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT (0x1 << 12)
51#define CQ_ENET_RQ_DESC_FLAGS_FCOE (0x1 << 13)
52#define CQ_ENET_RQ_DESC_FLAGS_EOP (0x1 << 14)
53#define CQ_ENET_RQ_DESC_FLAGS_SOP (0x1 << 15)
54
55#define CQ_ENET_RQ_DESC_RSS_TYPE_BITS 4
56#define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
57 ((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
58#define CQ_ENET_RQ_DESC_RSS_TYPE_NONE 0
59#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4 1
60#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4 2
61#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6 3
62#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6 4
63#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX 5
64#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX 6
65
66#define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC (0x1 << 14)
67
68#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS 14
69#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
70 ((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
71#define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED (0x1 << 14)
72#define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED (0x1 << 15)
73
74#define CQ_ENET_RQ_DESC_FCOE_SOF_BITS 4
75#define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
76 ((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
77#define CQ_ENET_RQ_DESC_FCOE_EOF_BITS 8
78#define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
79 ((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
80#define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT 8
81
82#define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK (0x1 << 0)
83#define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK (0x1 << 0)
84#define CQ_ENET_RQ_DESC_FLAGS_UDP (0x1 << 1)
85#define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR (0x1 << 1)
86#define CQ_ENET_RQ_DESC_FLAGS_TCP (0x1 << 2)
87#define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK (0x1 << 3)
88#define CQ_ENET_RQ_DESC_FLAGS_IPV6 (0x1 << 4)
89#define CQ_ENET_RQ_DESC_FLAGS_IPV4 (0x1 << 5)
90#define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT (0x1 << 6)
91#define CQ_ENET_RQ_DESC_FLAGS_FCS_OK (0x1 << 7)
92
93static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
94 u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
95 u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
96 u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
97 u8 *vlan_stripped, u16 *vlan, u16 *checksum, u8 *fcoe_sof,
98 u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
99 u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
100 u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
101{
102 u16 completed_index_flags = le16_to_cpu(desc->completed_index_flags);
103 u16 q_number_rss_type_flags =
104 le16_to_cpu(desc->q_number_rss_type_flags);
105 u16 bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
106
107 cq_desc_dec((struct cq_desc *)desc, type,
108 color, q_number, completed_index);
109
110 *ingress_port = (completed_index_flags &
111 CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
112 *fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
113 1 : 0;
114 *eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
115 1 : 0;
116 *sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
117 1 : 0;
118
119 *rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
120 CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
121 *csum_not_calc = (q_number_rss_type_flags &
122 CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
123
124 *rss_hash = le32_to_cpu(desc->rss_hash);
125
126 *bytes_written = bytes_written_flags &
127 CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
128 *packet_error = (bytes_written_flags &
129 CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
130 *vlan_stripped = (bytes_written_flags &
131 CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
132
133 *vlan = le16_to_cpu(desc->vlan);
134
135 if (*fcoe) {
136 *fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
137 CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
138 *fcoe_fc_crc_ok = (desc->flags &
139 CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
140 *fcoe_enc_error = (desc->flags &
141 CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
142 *fcoe_eof = (u8)((desc->checksum_fcoe >>
143 CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
144 CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
145 *checksum = 0;
146 } else {
147 *fcoe_sof = 0;
148 *fcoe_fc_crc_ok = 0;
149 *fcoe_enc_error = 0;
150 *fcoe_eof = 0;
151 *checksum = le16_to_cpu(desc->checksum_fcoe);
152 }
153
154 *tcp_udp_csum_ok =
155 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
156 *udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
157 *tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
158 *ipv4_csum_ok =
159 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
160 *ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
161 *ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
162 *ipv4_fragment =
163 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
164 *fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
165}
166
167#endif /* _CQ_ENET_DESC_H_ */
diff --git a/drivers/scsi/fnic/cq_exch_desc.h b/drivers/scsi/fnic/cq_exch_desc.h
new file mode 100644
index 000000000000..501660cfe228
--- /dev/null
+++ b/drivers/scsi/fnic/cq_exch_desc.h
@@ -0,0 +1,182 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _CQ_EXCH_DESC_H_
19#define _CQ_EXCH_DESC_H_
20
21#include "cq_desc.h"
22
23/* Exchange completion queue descriptor: 16B */
24struct cq_exch_wq_desc {
25 u16 completed_index;
26 u16 q_number;
27 u16 exchange_id;
28 u8 tmpl;
29 u8 reserved0;
30 u32 reserved1;
31 u8 exch_status;
32 u8 reserved2[2];
33 u8 type_color;
34};
35
36#define CQ_EXCH_WQ_STATUS_BITS 2
37#define CQ_EXCH_WQ_STATUS_MASK ((1 << CQ_EXCH_WQ_STATUS_BITS) - 1)
38
39enum cq_exch_status_types {
40 CQ_EXCH_WQ_STATUS_TYPE_COMPLETE = 0,
41 CQ_EXCH_WQ_STATUS_TYPE_ABORT = 1,
42 CQ_EXCH_WQ_STATUS_TYPE_SGL_EOF = 2,
43 CQ_EXCH_WQ_STATUS_TYPE_TMPL_ERR = 3,
44};
45
46static inline void cq_exch_wq_desc_dec(struct cq_exch_wq_desc *desc_ptr,
47 u8 *type,
48 u8 *color,
49 u16 *q_number,
50 u16 *completed_index,
51 u8 *exch_status)
52{
53 cq_desc_dec((struct cq_desc *)desc_ptr, type,
54 color, q_number, completed_index);
55 *exch_status = desc_ptr->exch_status & CQ_EXCH_WQ_STATUS_MASK;
56}
57
58struct cq_fcp_rq_desc {
59 u16 completed_index_eop_sop_prt;
60 u16 q_number;
61 u16 exchange_id;
62 u16 tmpl;
63 u16 bytes_written;
64 u16 vlan;
65 u8 sof;
66 u8 eof;
67 u8 fcs_fer_fck;
68 u8 type_color;
69};
70
71#define CQ_FCP_RQ_DESC_FLAGS_SOP (1 << 15)
72#define CQ_FCP_RQ_DESC_FLAGS_EOP (1 << 14)
73#define CQ_FCP_RQ_DESC_FLAGS_PRT (1 << 12)
74#define CQ_FCP_RQ_DESC_TMPL_MASK 0x1f
75#define CQ_FCP_RQ_DESC_BYTES_WRITTEN_MASK 0x3fff
76#define CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT 14
77#define CQ_FCP_RQ_DESC_PACKET_ERR_MASK (1 << CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT)
78#define CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT 15
79#define CQ_FCP_RQ_DESC_VS_STRIPPED_MASK (1 << CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT)
80#define CQ_FCP_RQ_DESC_FC_CRC_OK_MASK 0x1
81#define CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT 1
82#define CQ_FCP_RQ_DESC_FCOE_ERR_MASK (1 << CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT)
83#define CQ_FCP_RQ_DESC_FCS_OK_SHIFT 7
84#define CQ_FCP_RQ_DESC_FCS_OK_MASK (1 << CQ_FCP_RQ_DESC_FCS_OK_SHIFT)
85
86static inline void cq_fcp_rq_desc_dec(struct cq_fcp_rq_desc *desc_ptr,
87 u8 *type,
88 u8 *color,
89 u16 *q_number,
90 u16 *completed_index,
91 u8 *eop,
92 u8 *sop,
93 u8 *fck,
94 u16 *exchange_id,
95 u16 *tmpl,
96 u32 *bytes_written,
97 u8 *sof,
98 u8 *eof,
99 u8 *ingress_port,
100 u8 *packet_err,
101 u8 *fcoe_err,
102 u8 *fcs_ok,
103 u8 *vlan_stripped,
104 u16 *vlan)
105{
106 cq_desc_dec((struct cq_desc *)desc_ptr, type,
107 color, q_number, completed_index);
108 *eop = (desc_ptr->completed_index_eop_sop_prt &
109 CQ_FCP_RQ_DESC_FLAGS_EOP) ? 1 : 0;
110 *sop = (desc_ptr->completed_index_eop_sop_prt &
111 CQ_FCP_RQ_DESC_FLAGS_SOP) ? 1 : 0;
112 *ingress_port =
113 (desc_ptr->completed_index_eop_sop_prt &
114 CQ_FCP_RQ_DESC_FLAGS_PRT) ? 1 : 0;
115 *exchange_id = desc_ptr->exchange_id;
116 *tmpl = desc_ptr->tmpl & CQ_FCP_RQ_DESC_TMPL_MASK;
117 *bytes_written =
118 desc_ptr->bytes_written & CQ_FCP_RQ_DESC_BYTES_WRITTEN_MASK;
119 *packet_err =
120 (desc_ptr->bytes_written & CQ_FCP_RQ_DESC_PACKET_ERR_MASK) >>
121 CQ_FCP_RQ_DESC_PACKET_ERR_SHIFT;
122 *vlan_stripped =
123 (desc_ptr->bytes_written & CQ_FCP_RQ_DESC_VS_STRIPPED_MASK) >>
124 CQ_FCP_RQ_DESC_VS_STRIPPED_SHIFT;
125 *vlan = desc_ptr->vlan;
126 *sof = desc_ptr->sof;
127 *fck = desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FC_CRC_OK_MASK;
128 *fcoe_err = (desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FCOE_ERR_MASK) >>
129 CQ_FCP_RQ_DESC_FCOE_ERR_SHIFT;
130 *eof = desc_ptr->eof;
131 *fcs_ok =
132 (desc_ptr->fcs_fer_fck & CQ_FCP_RQ_DESC_FCS_OK_MASK) >>
133 CQ_FCP_RQ_DESC_FCS_OK_SHIFT;
134}
135
136struct cq_sgl_desc {
137 u16 exchange_id;
138 u16 q_number;
139 u32 active_burst_offset;
140 u32 tot_data_bytes;
141 u16 tmpl;
142 u8 sgl_err;
143 u8 type_color;
144};
145
146enum cq_sgl_err_types {
147 CQ_SGL_ERR_NO_ERROR = 0,
148 CQ_SGL_ERR_OVERFLOW, /* data ran beyond end of SGL */
149 CQ_SGL_ERR_SGL_LCL_ADDR_ERR, /* sgl access to local vnic addr illegal*/
150 CQ_SGL_ERR_ADDR_RSP_ERR, /* sgl address error */
151 CQ_SGL_ERR_DATA_RSP_ERR, /* sgl data rsp error */
152 CQ_SGL_ERR_CNT_ZERO_ERR, /* SGL count is 0 */
153 CQ_SGL_ERR_CNT_MAX_ERR, /* SGL count is larger than supported */
154 CQ_SGL_ERR_ORDER_ERR, /* frames recv on both ports, order err */
155 CQ_SGL_ERR_DATA_LCL_ADDR_ERR,/* sgl data buf to local vnic addr ill */
156 CQ_SGL_ERR_HOST_CQ_ERR, /* host cq entry to local vnic addr ill */
157};
158
159#define CQ_SGL_SGL_ERR_MASK 0x1f
160#define CQ_SGL_TMPL_MASK 0x1f
161
162static inline void cq_sgl_desc_dec(struct cq_sgl_desc *desc_ptr,
163 u8 *type,
164 u8 *color,
165 u16 *q_number,
166 u16 *exchange_id,
167 u32 *active_burst_offset,
168 u32 *tot_data_bytes,
169 u16 *tmpl,
170 u8 *sgl_err)
171{
172 /* Cheat a little by assuming exchange_id is the same as completed
173 index */
174 cq_desc_dec((struct cq_desc *)desc_ptr, type, color, q_number,
175 exchange_id);
176 *active_burst_offset = desc_ptr->active_burst_offset;
177 *tot_data_bytes = desc_ptr->tot_data_bytes;
178 *tmpl = desc_ptr->tmpl & CQ_SGL_TMPL_MASK;
179 *sgl_err = desc_ptr->sgl_err & CQ_SGL_SGL_ERR_MASK;
180}
181
182#endif /* _CQ_EXCH_DESC_H_ */
diff --git a/drivers/scsi/fnic/fcpio.h b/drivers/scsi/fnic/fcpio.h
new file mode 100644
index 000000000000..12d770d885c5
--- /dev/null
+++ b/drivers/scsi/fnic/fcpio.h
@@ -0,0 +1,780 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _FCPIO_H_
19#define _FCPIO_H_
20
21#include <linux/if_ether.h>
22
23/*
24 * This header file includes all of the data structures used for
25 * communication by the host driver to the fcp firmware.
26 */
27
28/*
29 * Exchange and sequence id space allocated to the host driver
30 */
31#define FCPIO_HOST_EXCH_RANGE_START 0x1000
32#define FCPIO_HOST_EXCH_RANGE_END 0x1fff
33#define FCPIO_HOST_SEQ_ID_RANGE_START 0x80
34#define FCPIO_HOST_SEQ_ID_RANGE_END 0xff
35
36/*
37 * Command entry type
38 */
39enum fcpio_type {
40 /*
41 * Initiator request types
42 */
43 FCPIO_ICMND_16 = 0x1,
44 FCPIO_ICMND_32,
45 FCPIO_ICMND_CMPL,
46 FCPIO_ITMF,
47 FCPIO_ITMF_CMPL,
48
49 /*
50 * Target request types
51 */
52 FCPIO_TCMND_16 = 0x11,
53 FCPIO_TCMND_32,
54 FCPIO_TDATA,
55 FCPIO_TXRDY,
56 FCPIO_TRSP,
57 FCPIO_TDRSP_CMPL,
58 FCPIO_TTMF,
59 FCPIO_TTMF_ACK,
60 FCPIO_TABORT,
61 FCPIO_TABORT_CMPL,
62
63 /*
64 * Misc request types
65 */
66 FCPIO_ACK = 0x20,
67 FCPIO_RESET,
68 FCPIO_RESET_CMPL,
69 FCPIO_FLOGI_REG,
70 FCPIO_FLOGI_REG_CMPL,
71 FCPIO_ECHO,
72 FCPIO_ECHO_CMPL,
73 FCPIO_LUNMAP_CHNG,
74 FCPIO_LUNMAP_REQ,
75 FCPIO_LUNMAP_REQ_CMPL,
76 FCPIO_FLOGI_FIP_REG,
77 FCPIO_FLOGI_FIP_REG_CMPL,
78};
79
80/*
81 * Header status codes from the firmware
82 */
83enum fcpio_status {
84 FCPIO_SUCCESS = 0, /* request was successful */
85
86 /*
87 * If a request to the firmware is rejected, the original request
88 * header will be returned with the status set to one of the following:
89 */
90 FCPIO_INVALID_HEADER, /* header contains invalid data */
91 FCPIO_OUT_OF_RESOURCE, /* out of resources to complete request */
92 FCPIO_INVALID_PARAM, /* some parameter in request is invalid */
93 FCPIO_REQ_NOT_SUPPORTED, /* request type is not supported */
94 FCPIO_IO_NOT_FOUND, /* requested I/O was not found */
95
96 /*
97 * Once a request is processed, the firmware will usually return
98 * a cmpl message type. In cases where errors occurred,
99 * the header status field would be filled in with one of the following:
100 */
101 FCPIO_ABORTED = 0x41, /* request was aborted */
102 FCPIO_TIMEOUT, /* request was timed out */
103 FCPIO_SGL_INVALID, /* request was aborted due to sgl error */
104 FCPIO_MSS_INVALID, /* request was aborted due to mss error */
105 FCPIO_DATA_CNT_MISMATCH, /* recv/sent more/less data than exp. */
106 FCPIO_FW_ERR, /* request was terminated due to fw error */
107 FCPIO_ITMF_REJECTED, /* itmf req was rejected by remote node */
108 FCPIO_ITMF_FAILED, /* itmf req was failed by remote node */
109 FCPIO_ITMF_INCORRECT_LUN, /* itmf req targeted incorrect LUN */
110 FCPIO_CMND_REJECTED, /* request was invalid and rejected */
111 FCPIO_NO_PATH_AVAIL, /* no paths to the lun was available */
112 FCPIO_PATH_FAILED, /* i/o sent to current path failed */
113 FCPIO_LUNMAP_CHNG_PEND, /* i/o rejected due to lunmap change */
114};
115
116/*
117 * The header command tag. All host requests will use the "tag" field
118 * to mark commands with a unique tag. When the firmware responds to
119 * a host request, it will copy the tag field into the response.
120 *
121 * The only firmware requests that will use the rx_id/ox_id fields instead
122 * of the tag field will be the target command and target task management
123 * requests. These two requests do not have corresponding host requests
124 * since they come directly from the FC initiator on the network.
125 */
126struct fcpio_tag {
127 union {
128 u32 req_id;
129 struct {
130 u16 rx_id;
131 u16 ox_id;
132 } ex_id;
133 } u;
134};
135
136static inline void
137fcpio_tag_id_enc(struct fcpio_tag *tag, u32 id)
138{
139 tag->u.req_id = id;
140}
141
142static inline void
143fcpio_tag_id_dec(struct fcpio_tag *tag, u32 *id)
144{
145 *id = tag->u.req_id;
146}
147
148static inline void
149fcpio_tag_exid_enc(struct fcpio_tag *tag, u16 ox_id, u16 rx_id)
150{
151 tag->u.ex_id.rx_id = rx_id;
152 tag->u.ex_id.ox_id = ox_id;
153}
154
155static inline void
156fcpio_tag_exid_dec(struct fcpio_tag *tag, u16 *ox_id, u16 *rx_id)
157{
158 *rx_id = tag->u.ex_id.rx_id;
159 *ox_id = tag->u.ex_id.ox_id;
160}
161
162/*
163 * The header for an fcpio request, whether from the firmware or from the
164 * host driver
165 */
166struct fcpio_header {
167 u8 type; /* enum fcpio_type */
168 u8 status; /* header status entry */
169 u16 _resvd; /* reserved */
170 struct fcpio_tag tag; /* header tag */
171};
172
173static inline void
174fcpio_header_enc(struct fcpio_header *hdr,
175 u8 type, u8 status,
176 struct fcpio_tag tag)
177{
178 hdr->type = type;
179 hdr->status = status;
180 hdr->_resvd = 0;
181 hdr->tag = tag;
182}
183
184static inline void
185fcpio_header_dec(struct fcpio_header *hdr,
186 u8 *type, u8 *status,
187 struct fcpio_tag *tag)
188{
189 *type = hdr->type;
190 *status = hdr->status;
191 *tag = hdr->tag;
192}
193
194#define CDB_16 16
195#define CDB_32 32
196#define LUN_ADDRESS 8
197
198/*
199 * fcpio_icmnd_16: host -> firmware request
200 *
201 * used for sending out an initiator SCSI 16-byte command
202 */
203struct fcpio_icmnd_16 {
204 u32 lunmap_id; /* index into lunmap table */
205 u8 special_req_flags; /* special exchange request flags */
206 u8 _resvd0[3]; /* reserved */
207 u32 sgl_cnt; /* scatter-gather list count */
208 u32 sense_len; /* sense buffer length */
209 u64 sgl_addr; /* scatter-gather list addr */
210 u64 sense_addr; /* sense buffer address */
211 u8 crn; /* SCSI Command Reference No. */
212 u8 pri_ta; /* SCSI Priority and Task attribute */
213 u8 _resvd1; /* reserved: should be 0 */
214 u8 flags; /* command flags */
215 u8 scsi_cdb[CDB_16]; /* SCSI Cmnd Descriptor Block */
216 u32 data_len; /* length of data expected */
217 u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
218 u8 _resvd2; /* reserved */
219 u8 d_id[3]; /* FC vNIC only: Target D_ID */
220 u16 mss; /* FC vNIC only: max burst */
221 u16 _resvd3; /* reserved */
222 u32 r_a_tov; /* FC vNIC only: Res. Alloc Timeout */
223 u32 e_d_tov; /* FC vNIC only: Err Detect Timeout */
224};
225
226/*
227 * Special request flags
228 */
229#define FCPIO_ICMND_SRFLAG_RETRY 0x01 /* Enable Retry handling on exchange */
230
231/*
232 * Priority/Task Attribute settings
233 */
234#define FCPIO_ICMND_PTA_SIMPLE 0 /* simple task attribute */
235#define FCPIO_ICMND_PTA_HEADQ 1 /* head of queue task attribute */
236#define FCPIO_ICMND_PTA_ORDERED 2 /* ordered task attribute */
237#define FCPIO_ICMND_PTA_ACA 4 /* auto contingent allegiance */
238#define FCPIO_ICMND_PRI_SHIFT 3 /* priority field starts in bit 3 */
239
240/*
241 * Command flags
242 */
243#define FCPIO_ICMND_RDDATA 0x02 /* read data */
244#define FCPIO_ICMND_WRDATA 0x01 /* write data */
245
246/*
247 * fcpio_icmnd_32: host -> firmware request
248 *
249 * used for sending out an initiator SCSI 32-byte command
250 */
251struct fcpio_icmnd_32 {
252 u32 lunmap_id; /* index into lunmap table */
253 u8 special_req_flags; /* special exchange request flags */
254 u8 _resvd0[3]; /* reserved */
255 u32 sgl_cnt; /* scatter-gather list count */
256 u32 sense_len; /* sense buffer length */
257 u64 sgl_addr; /* scatter-gather list addr */
258 u64 sense_addr; /* sense buffer address */
259 u8 crn; /* SCSI Command Reference No. */
260 u8 pri_ta; /* SCSI Priority and Task attribute */
261 u8 _resvd1; /* reserved: should be 0 */
262 u8 flags; /* command flags */
263 u8 scsi_cdb[CDB_32]; /* SCSI Cmnd Descriptor Block */
264 u32 data_len; /* length of data expected */
265 u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
266 u8 _resvd2; /* reserved */
267 u8 d_id[3]; /* FC vNIC only: Target D_ID */
268 u16 mss; /* FC vNIC only: max burst */
269 u16 _resvd3; /* reserved */
270 u32 r_a_tov; /* FC vNIC only: Res. Alloc Timeout */
271 u32 e_d_tov; /* FC vNIC only: Error Detect Timeout */
272};
273
274/*
275 * fcpio_itmf: host -> firmware request
276 *
277 * used for requesting the firmware to abort a request and/or send out
278 * a task management function
279 *
280 * The t_tag field is only needed when the request type is ABT_TASK.
281 */
282struct fcpio_itmf {
283 u32 lunmap_id; /* index into lunmap table */
284 u32 tm_req; /* SCSI Task Management request */
285 u32 t_tag; /* header tag of fcpio to be aborted */
286 u32 _resvd; /* _reserved */
287 u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
288 u8 _resvd1; /* reserved */
289 u8 d_id[3]; /* FC vNIC only: Target D_ID */
290 u32 r_a_tov; /* FC vNIC only: R_A_TOV in msec */
291 u32 e_d_tov; /* FC vNIC only: E_D_TOV in msec */
292};
293
294/*
295 * Task Management request
296 */
297enum fcpio_itmf_tm_req_type {
298 FCPIO_ITMF_ABT_TASK_TERM = 0x01, /* abort task and terminate */
299 FCPIO_ITMF_ABT_TASK, /* abort task and issue abts */
300 FCPIO_ITMF_ABT_TASK_SET, /* abort task set */
301 FCPIO_ITMF_CLR_TASK_SET, /* clear task set */
302 FCPIO_ITMF_LUN_RESET, /* logical unit reset task mgmt */
303 FCPIO_ITMF_CLR_ACA, /* Clear ACA condition */
304};
305
306/*
307 * fcpio_tdata: host -> firmware request
308 *
309 * used for requesting the firmware to send out a read data transfer for a
310 * target command
311 */
312struct fcpio_tdata {
313 u16 rx_id; /* FC rx_id of target command */
314 u16 flags; /* command flags */
315 u32 rel_offset; /* data sequence relative offset */
316 u32 sgl_cnt; /* scatter-gather list count */
317 u32 data_len; /* length of data expected to send */
318 u64 sgl_addr; /* scatter-gather list address */
319};
320
321/*
322 * Command flags
323 */
324#define FCPIO_TDATA_SCSI_RSP 0x01 /* send a scsi resp. after last frame */
325
326/*
327 * fcpio_txrdy: host -> firmware request
328 *
329 * used for requesting the firmware to send out a write data transfer for a
330 * target command
331 */
332struct fcpio_txrdy {
333 u16 rx_id; /* FC rx_id of target command */
334 u16 _resvd0; /* reserved */
335 u32 rel_offset; /* data sequence relative offset */
336 u32 sgl_cnt; /* scatter-gather list count */
337 u32 data_len; /* length of data expected to send */
338 u64 sgl_addr; /* scatter-gather list address */
339};
340
341/*
342 * fcpio_trsp: host -> firmware request
343 *
344 * used for requesting the firmware to send out a response for a target
345 * command
346 */
347struct fcpio_trsp {
348 u16 rx_id; /* FC rx_id of target command */
349 u16 _resvd0; /* reserved */
350 u32 sense_len; /* sense data buffer length */
351 u64 sense_addr; /* sense data buffer address */
352 u16 _resvd1; /* reserved */
353 u8 flags; /* response request flags */
354 u8 scsi_status; /* SCSI status */
355 u32 residual; /* SCSI data residual value of I/O */
356};
357
358/*
359 * resposnse request flags
360 */
361#define FCPIO_TRSP_RESID_UNDER 0x08 /* residual is valid and is underflow */
362#define FCPIO_TRSP_RESID_OVER 0x04 /* residual is valid and is overflow */
363
364/*
365 * fcpio_ttmf_ack: host -> firmware response
366 *
367 * used by the host to indicate to the firmware it has received and processed
368 * the target tmf request
369 */
370struct fcpio_ttmf_ack {
371 u16 rx_id; /* FC rx_id of target command */
372 u16 _resvd0; /* reserved */
373 u32 tmf_status; /* SCSI task management status */
374};
375
376/*
377 * fcpio_tabort: host -> firmware request
378 *
379 * used by the host to request the firmware to abort a target request that was
380 * received by the firmware
381 */
382struct fcpio_tabort {
383 u16 rx_id; /* rx_id of the target request */
384};
385
386/*
387 * fcpio_reset: host -> firmware request
388 *
389 * used by the host to signal a reset of the driver to the firmware
390 * and to request firmware to clean up all outstanding I/O
391 */
392struct fcpio_reset {
393 u32 _resvd;
394};
395
396enum fcpio_flogi_reg_format_type {
397 FCPIO_FLOGI_REG_DEF_DEST = 0, /* Use the oui | s_id mac format */
398 FCPIO_FLOGI_REG_GW_DEST, /* Use the fixed gateway mac */
399};
400
401/*
402 * fcpio_flogi_reg: host -> firmware request
403 *
404 * fc vnic only
405 * used by the host to notify the firmware of the lif's s_id
406 * and destination mac address format
407 */
408struct fcpio_flogi_reg {
409 u8 format;
410 u8 s_id[3]; /* FC vNIC only: Source S_ID */
411 u8 gateway_mac[ETH_ALEN]; /* Destination gateway mac */
412 u16 _resvd;
413 u32 r_a_tov; /* R_A_TOV in msec */
414 u32 e_d_tov; /* E_D_TOV in msec */
415};
416
417/*
418 * fcpio_echo: host -> firmware request
419 *
420 * sends a heartbeat echo request to the firmware
421 */
422struct fcpio_echo {
423 u32 _resvd;
424};
425
426/*
427 * fcpio_lunmap_req: host -> firmware request
428 *
429 * scsi vnic only
430 * sends a request to retrieve the lunmap table for scsi vnics
431 */
432struct fcpio_lunmap_req {
433 u64 addr; /* address of the buffer */
434 u32 len; /* len of the buffer */
435};
436
437/*
438 * fcpio_flogi_fip_reg: host -> firmware request
439 *
440 * fc vnic only
441 * used by the host to notify the firmware of the lif's s_id
442 * and destination mac address format
443 */
444struct fcpio_flogi_fip_reg {
445 u8 _resvd0;
446 u8 s_id[3]; /* FC vNIC only: Source S_ID */
447 u8 fcf_mac[ETH_ALEN]; /* FCF Target destination mac */
448 u16 _resvd1;
449 u32 r_a_tov; /* R_A_TOV in msec */
450 u32 e_d_tov; /* E_D_TOV in msec */
451 u8 ha_mac[ETH_ALEN]; /* Host adapter source mac */
452 u16 _resvd2;
453};
454
455/*
456 * Basic structure for all fcpio structures that are sent from the host to the
457 * firmware. They are 128 bytes per structure.
458 */
459#define FCPIO_HOST_REQ_LEN 128 /* expected length of host requests */
460
461struct fcpio_host_req {
462 struct fcpio_header hdr;
463
464 union {
465 /*
466 * Defines space needed for request
467 */
468 u8 buf[FCPIO_HOST_REQ_LEN - sizeof(struct fcpio_header)];
469
470 /*
471 * Initiator host requests
472 */
473 struct fcpio_icmnd_16 icmnd_16;
474 struct fcpio_icmnd_32 icmnd_32;
475 struct fcpio_itmf itmf;
476
477 /*
478 * Target host requests
479 */
480 struct fcpio_tdata tdata;
481 struct fcpio_txrdy txrdy;
482 struct fcpio_trsp trsp;
483 struct fcpio_ttmf_ack ttmf_ack;
484 struct fcpio_tabort tabort;
485
486 /*
487 * Misc requests
488 */
489 struct fcpio_reset reset;
490 struct fcpio_flogi_reg flogi_reg;
491 struct fcpio_echo echo;
492 struct fcpio_lunmap_req lunmap_req;
493 struct fcpio_flogi_fip_reg flogi_fip_reg;
494 } u;
495};
496
497/*
498 * fcpio_icmnd_cmpl: firmware -> host response
499 *
500 * used for sending the host a response to an initiator command
501 */
502struct fcpio_icmnd_cmpl {
503 u8 _resvd0[6]; /* reserved */
504 u8 flags; /* response flags */
505 u8 scsi_status; /* SCSI status */
506 u32 residual; /* SCSI data residual length */
507 u32 sense_len; /* SCSI sense length */
508};
509
510/*
511 * response flags
512 */
513#define FCPIO_ICMND_CMPL_RESID_UNDER 0x08 /* resid under and valid */
514#define FCPIO_ICMND_CMPL_RESID_OVER 0x04 /* resid over and valid */
515
516/*
517 * fcpio_itmf_cmpl: firmware -> host response
518 *
519 * used for sending the host a response for a itmf request
520 */
521struct fcpio_itmf_cmpl {
522 u32 _resvd; /* reserved */
523};
524
525/*
526 * fcpio_tcmnd_16: firmware -> host request
527 *
528 * used by the firmware to notify the host of an incoming target SCSI 16-Byte
529 * request
530 */
531struct fcpio_tcmnd_16 {
532 u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
533 u8 crn; /* SCSI Command Reference No. */
534 u8 pri_ta; /* SCSI Priority and Task attribute */
535 u8 _resvd2; /* reserved: should be 0 */
536 u8 flags; /* command flags */
537 u8 scsi_cdb[CDB_16]; /* SCSI Cmnd Descriptor Block */
538 u32 data_len; /* length of data expected */
539 u8 _resvd1; /* reserved */
540 u8 s_id[3]; /* FC vNIC only: Source S_ID */
541};
542
543/*
544 * Priority/Task Attribute settings
545 */
546#define FCPIO_TCMND_PTA_SIMPLE 0 /* simple task attribute */
547#define FCPIO_TCMND_PTA_HEADQ 1 /* head of queue task attribute */
548#define FCPIO_TCMND_PTA_ORDERED 2 /* ordered task attribute */
549#define FCPIO_TCMND_PTA_ACA 4 /* auto contingent allegiance */
550#define FCPIO_TCMND_PRI_SHIFT 3 /* priority field starts in bit 3 */
551
552/*
553 * Command flags
554 */
555#define FCPIO_TCMND_RDDATA 0x02 /* read data */
556#define FCPIO_TCMND_WRDATA 0x01 /* write data */
557
558/*
559 * fcpio_tcmnd_32: firmware -> host request
560 *
561 * used by the firmware to notify the host of an incoming target SCSI 32-Byte
562 * request
563 */
564struct fcpio_tcmnd_32 {
565 u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
566 u8 crn; /* SCSI Command Reference No. */
567 u8 pri_ta; /* SCSI Priority and Task attribute */
568 u8 _resvd2; /* reserved: should be 0 */
569 u8 flags; /* command flags */
570 u8 scsi_cdb[CDB_32]; /* SCSI Cmnd Descriptor Block */
571 u32 data_len; /* length of data expected */
572 u8 _resvd0; /* reserved */
573 u8 s_id[3]; /* FC vNIC only: Source S_ID */
574};
575
576/*
577 * fcpio_tdrsp_cmpl: firmware -> host response
578 *
579 * used by the firmware to notify the host of a response to a host target
580 * command
581 */
582struct fcpio_tdrsp_cmpl {
583 u16 rx_id; /* rx_id of the target request */
584 u16 _resvd0; /* reserved */
585};
586
587/*
588 * fcpio_ttmf: firmware -> host request
589 *
590 * used by the firmware to notify the host of an incoming task management
591 * function request
592 */
593struct fcpio_ttmf {
594 u8 _resvd0; /* reserved */
595 u8 s_id[3]; /* FC vNIC only: Source S_ID */
596 u8 lun[LUN_ADDRESS]; /* FC vNIC only: LUN address */
597 u8 crn; /* SCSI Command Reference No. */
598 u8 _resvd2[3]; /* reserved */
599 u32 tmf_type; /* task management request type */
600};
601
602/*
603 * Task Management request
604 */
605#define FCPIO_TTMF_CLR_ACA 0x40 /* Clear ACA condition */
606#define FCPIO_TTMF_LUN_RESET 0x10 /* logical unit reset task mgmt */
607#define FCPIO_TTMF_CLR_TASK_SET 0x04 /* clear task set */
608#define FCPIO_TTMF_ABT_TASK_SET 0x02 /* abort task set */
609#define FCPIO_TTMF_ABT_TASK 0x01 /* abort task */
610
611/*
612 * fcpio_tabort_cmpl: firmware -> host response
613 *
614 * used by the firmware to respond to a host's tabort request
615 */
616struct fcpio_tabort_cmpl {
617 u16 rx_id; /* rx_id of the target request */
618 u16 _resvd0; /* reserved */
619};
620
621/*
622 * fcpio_ack: firmware -> host response
623 *
624 * used by firmware to notify the host of the last work request received
625 */
626struct fcpio_ack {
627 u16 request_out; /* last host entry received */
628 u16 _resvd;
629};
630
631/*
632 * fcpio_reset_cmpl: firmware -> host response
633 *
634 * use by firmware to respond to the host's reset request
635 */
636struct fcpio_reset_cmpl {
637 u16 vnic_id;
638};
639
640/*
641 * fcpio_flogi_reg_cmpl: firmware -> host response
642 *
643 * fc vnic only
644 * response to the fcpio_flogi_reg request
645 */
646struct fcpio_flogi_reg_cmpl {
647 u32 _resvd;
648};
649
650/*
651 * fcpio_echo_cmpl: firmware -> host response
652 *
653 * response to the fcpio_echo request
654 */
655struct fcpio_echo_cmpl {
656 u32 _resvd;
657};
658
659/*
660 * fcpio_lunmap_chng: firmware -> host notification
661 *
662 * scsi vnic only
663 * notifies the host that the lunmap tables have changed
664 */
665struct fcpio_lunmap_chng {
666 u32 _resvd;
667};
668
669/*
670 * fcpio_lunmap_req_cmpl: firmware -> host response
671 *
672 * scsi vnic only
673 * response for lunmap table request from the host
674 */
675struct fcpio_lunmap_req_cmpl {
676 u32 _resvd;
677};
678
679/*
680 * Basic structure for all fcpio structures that are sent from the firmware to
681 * the host. They are 64 bytes per structure.
682 */
683#define FCPIO_FW_REQ_LEN 64 /* expected length of fw requests */
684struct fcpio_fw_req {
685 struct fcpio_header hdr;
686
687 union {
688 /*
689 * Defines space needed for request
690 */
691 u8 buf[FCPIO_FW_REQ_LEN - sizeof(struct fcpio_header)];
692
693 /*
694 * Initiator firmware responses
695 */
696 struct fcpio_icmnd_cmpl icmnd_cmpl;
697 struct fcpio_itmf_cmpl itmf_cmpl;
698
699 /*
700 * Target firmware new requests
701 */
702 struct fcpio_tcmnd_16 tcmnd_16;
703 struct fcpio_tcmnd_32 tcmnd_32;
704
705 /*
706 * Target firmware responses
707 */
708 struct fcpio_tdrsp_cmpl tdrsp_cmpl;
709 struct fcpio_ttmf ttmf;
710 struct fcpio_tabort_cmpl tabort_cmpl;
711
712 /*
713 * Firmware response to work received
714 */
715 struct fcpio_ack ack;
716
717 /*
718 * Misc requests
719 */
720 struct fcpio_reset_cmpl reset_cmpl;
721 struct fcpio_flogi_reg_cmpl flogi_reg_cmpl;
722 struct fcpio_echo_cmpl echo_cmpl;
723 struct fcpio_lunmap_chng lunmap_chng;
724 struct fcpio_lunmap_req_cmpl lunmap_req_cmpl;
725 } u;
726};
727
728/*
729 * Access routines to encode and decode the color bit, which is the most
730 * significant bit of the MSB of the structure
731 */
732static inline void fcpio_color_enc(struct fcpio_fw_req *fw_req, u8 color)
733{
734 u8 *c = ((u8 *) fw_req) + sizeof(struct fcpio_fw_req) - 1;
735
736 if (color)
737 *c |= 0x80;
738 else
739 *c &= ~0x80;
740}
741
742static inline void fcpio_color_dec(struct fcpio_fw_req *fw_req, u8 *color)
743{
744 u8 *c = ((u8 *) fw_req) + sizeof(struct fcpio_fw_req) - 1;
745
746 *color = *c >> 7;
747
748 /*
749 * Make sure color bit is read from desc *before* other fields
750 * are read from desc. Hardware guarantees color bit is last
751 * bit (byte) written. Adding the rmb() prevents the compiler
752 * and/or CPU from reordering the reads which would potentially
753 * result in reading stale values.
754 */
755
756 rmb();
757
758}
759
760/*
761 * Lunmap table entry for scsi vnics
762 */
763#define FCPIO_LUNMAP_TABLE_SIZE 256
764#define FCPIO_FLAGS_LUNMAP_VALID 0x80
765#define FCPIO_FLAGS_BOOT 0x01
766struct fcpio_lunmap_entry {
767 u8 bus;
768 u8 target;
769 u8 lun;
770 u8 path_cnt;
771 u16 flags;
772 u16 update_cnt;
773};
774
775struct fcpio_lunmap_tbl {
776 u32 update_cnt;
777 struct fcpio_lunmap_entry lunmaps[FCPIO_LUNMAP_TABLE_SIZE];
778};
779
780#endif /* _FCPIO_H_ */
diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
new file mode 100644
index 000000000000..e4c0a3d7d87b
--- /dev/null
+++ b/drivers/scsi/fnic/fnic.h
@@ -0,0 +1,265 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _FNIC_H_
19#define _FNIC_H_
20
21#include <linux/interrupt.h>
22#include <linux/netdevice.h>
23#include <linux/workqueue.h>
24#include <scsi/libfc.h>
25#include "fnic_io.h"
26#include "fnic_res.h"
27#include "vnic_dev.h"
28#include "vnic_wq.h"
29#include "vnic_rq.h"
30#include "vnic_cq.h"
31#include "vnic_wq_copy.h"
32#include "vnic_intr.h"
33#include "vnic_stats.h"
34#include "vnic_scsi.h"
35
36#define DRV_NAME "fnic"
37#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
38#define DRV_VERSION "1.0.0.1121"
39#define PFX DRV_NAME ": "
40#define DFX DRV_NAME "%d: "
41
42#define DESC_CLEAN_LOW_WATERMARK 8
43#define FNIC_MAX_IO_REQ 2048 /* scsi_cmnd tag map entries */
44#define FNIC_IO_LOCKS 64 /* IO locks: power of 2 */
45#define FNIC_DFLT_QUEUE_DEPTH 32
46#define FNIC_STATS_RATE_LIMIT 4 /* limit rate at which stats are pulled up */
47
48/*
49 * Tag bits used for special requests.
50 */
51#define BIT(nr) (1UL << (nr))
52#define FNIC_TAG_ABORT BIT(30) /* tag bit indicating abort */
53#define FNIC_TAG_DEV_RST BIT(29) /* indicates device reset */
54#define FNIC_TAG_MASK (BIT(24) - 1) /* mask for lookup */
55#define FNIC_NO_TAG -1
56
57/*
58 * Usage of the scsi_cmnd scratchpad.
59 * These fields are locked by the hashed io_req_lock.
60 */
61#define CMD_SP(Cmnd) ((Cmnd)->SCp.ptr)
62#define CMD_STATE(Cmnd) ((Cmnd)->SCp.phase)
63#define CMD_ABTS_STATUS(Cmnd) ((Cmnd)->SCp.Message)
64#define CMD_LR_STATUS(Cmnd) ((Cmnd)->SCp.have_data_in)
65#define CMD_TAG(Cmnd) ((Cmnd)->SCp.sent_command)
66
67#define FCPIO_INVALID_CODE 0x100 /* hdr_status value unused by firmware */
68
69#define FNIC_LUN_RESET_TIMEOUT 10000 /* mSec */
70#define FNIC_HOST_RESET_TIMEOUT 10000 /* mSec */
71#define FNIC_RMDEVICE_TIMEOUT 1000 /* mSec */
72#define FNIC_HOST_RESET_SETTLE_TIME 30 /* Sec */
73
74#define FNIC_MAX_FCP_TARGET 256
75
76extern unsigned int fnic_log_level;
77
78#define FNIC_MAIN_LOGGING 0x01
79#define FNIC_FCS_LOGGING 0x02
80#define FNIC_SCSI_LOGGING 0x04
81#define FNIC_ISR_LOGGING 0x08
82
83#define FNIC_CHECK_LOGGING(LEVEL, CMD) \
84do { \
85 if (unlikely(fnic_log_level & LEVEL)) \
86 do { \
87 CMD; \
88 } while (0); \
89} while (0)
90
91#define FNIC_MAIN_DBG(kern_level, host, fmt, args...) \
92 FNIC_CHECK_LOGGING(FNIC_MAIN_LOGGING, \
93 shost_printk(kern_level, host, fmt, ##args);)
94
95#define FNIC_FCS_DBG(kern_level, host, fmt, args...) \
96 FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING, \
97 shost_printk(kern_level, host, fmt, ##args);)
98
99#define FNIC_SCSI_DBG(kern_level, host, fmt, args...) \
100 FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING, \
101 shost_printk(kern_level, host, fmt, ##args);)
102
103#define FNIC_ISR_DBG(kern_level, host, fmt, args...) \
104 FNIC_CHECK_LOGGING(FNIC_ISR_LOGGING, \
105 shost_printk(kern_level, host, fmt, ##args);)
106
107extern const char *fnic_state_str[];
108
109enum fnic_intx_intr_index {
110 FNIC_INTX_WQ_RQ_COPYWQ,
111 FNIC_INTX_ERR,
112 FNIC_INTX_NOTIFY,
113 FNIC_INTX_INTR_MAX,
114};
115
116enum fnic_msix_intr_index {
117 FNIC_MSIX_RQ,
118 FNIC_MSIX_WQ,
119 FNIC_MSIX_WQ_COPY,
120 FNIC_MSIX_ERR_NOTIFY,
121 FNIC_MSIX_INTR_MAX,
122};
123
124struct fnic_msix_entry {
125 int requested;
126 char devname[IFNAMSIZ];
127 irqreturn_t (*isr)(int, void *);
128 void *devid;
129};
130
131enum fnic_state {
132 FNIC_IN_FC_MODE = 0,
133 FNIC_IN_FC_TRANS_ETH_MODE,
134 FNIC_IN_ETH_MODE,
135 FNIC_IN_ETH_TRANS_FC_MODE,
136};
137
138#define FNIC_WQ_COPY_MAX 1
139#define FNIC_WQ_MAX 1
140#define FNIC_RQ_MAX 1
141#define FNIC_CQ_MAX (FNIC_WQ_COPY_MAX + FNIC_WQ_MAX + FNIC_RQ_MAX)
142
143struct mempool;
144
145/* Per-instance private data structure */
146struct fnic {
147 struct fc_lport *lport;
148 struct vnic_dev_bar bar0;
149
150 struct msix_entry msix_entry[FNIC_MSIX_INTR_MAX];
151 struct fnic_msix_entry msix[FNIC_MSIX_INTR_MAX];
152
153 struct vnic_stats *stats;
154 unsigned long stats_time; /* time of stats update */
155 struct vnic_nic_cfg *nic_cfg;
156 char name[IFNAMSIZ];
157 struct timer_list notify_timer; /* used for MSI interrupts */
158
159 unsigned int err_intr_offset;
160 unsigned int link_intr_offset;
161
162 unsigned int wq_count;
163 unsigned int cq_count;
164
165 u32 fcoui_mode:1; /* use fcoui address*/
166 u32 vlan_hw_insert:1; /* let hw insert the tag */
167 u32 in_remove:1; /* fnic device in removal */
168 u32 stop_rx_link_events:1; /* stop proc. rx frames, link events */
169
170 struct completion *remove_wait; /* device remove thread blocks */
171
172 struct fc_frame *flogi;
173 struct fc_frame *flogi_resp;
174 u16 flogi_oxid;
175 unsigned long s_id;
176 enum fnic_state state;
177 spinlock_t fnic_lock;
178
179 u16 vlan_id; /* VLAN tag including priority */
180 u8 mac_addr[ETH_ALEN];
181 u8 dest_addr[ETH_ALEN];
182 u8 data_src_addr[ETH_ALEN];
183 u64 fcp_input_bytes; /* internal statistic */
184 u64 fcp_output_bytes; /* internal statistic */
185 u32 link_down_cnt;
186 int link_status;
187
188 struct list_head list;
189 struct pci_dev *pdev;
190 struct vnic_fc_config config;
191 struct vnic_dev *vdev;
192 unsigned int raw_wq_count;
193 unsigned int wq_copy_count;
194 unsigned int rq_count;
195 int fw_ack_index[FNIC_WQ_COPY_MAX];
196 unsigned short fw_ack_recd[FNIC_WQ_COPY_MAX];
197 unsigned short wq_copy_desc_low[FNIC_WQ_COPY_MAX];
198 unsigned int intr_count;
199 u32 __iomem *legacy_pba;
200 struct fnic_host_tag *tags;
201 mempool_t *io_req_pool;
202 mempool_t *io_sgl_pool[FNIC_SGL_NUM_CACHES];
203 spinlock_t io_req_lock[FNIC_IO_LOCKS]; /* locks for scsi cmnds */
204
205 struct work_struct link_work;
206 struct work_struct frame_work;
207 struct sk_buff_head frame_queue;
208
209 /* copy work queue cache line section */
210 ____cacheline_aligned struct vnic_wq_copy wq_copy[FNIC_WQ_COPY_MAX];
211 /* completion queue cache line section */
212 ____cacheline_aligned struct vnic_cq cq[FNIC_CQ_MAX];
213
214 spinlock_t wq_copy_lock[FNIC_WQ_COPY_MAX];
215
216 /* work queue cache line section */
217 ____cacheline_aligned struct vnic_wq wq[FNIC_WQ_MAX];
218 spinlock_t wq_lock[FNIC_WQ_MAX];
219
220 /* receive queue cache line section */
221 ____cacheline_aligned struct vnic_rq rq[FNIC_RQ_MAX];
222
223 /* interrupt resource cache line section */
224 ____cacheline_aligned struct vnic_intr intr[FNIC_MSIX_INTR_MAX];
225};
226
227extern struct workqueue_struct *fnic_event_queue;
228extern struct device_attribute *fnic_attrs[];
229
230void fnic_clear_intr_mode(struct fnic *fnic);
231int fnic_set_intr_mode(struct fnic *fnic);
232void fnic_free_intr(struct fnic *fnic);
233int fnic_request_intr(struct fnic *fnic);
234
235int fnic_send(struct fc_lport *, struct fc_frame *);
236void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf);
237void fnic_handle_frame(struct work_struct *work);
238void fnic_handle_link(struct work_struct *work);
239int fnic_rq_cmpl_handler(struct fnic *fnic, int);
240int fnic_alloc_rq_frame(struct vnic_rq *rq);
241void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
242int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp);
243
244int fnic_queuecommand(struct scsi_cmnd *, void (*done)(struct scsi_cmnd *));
245int fnic_abort_cmd(struct scsi_cmnd *);
246int fnic_device_reset(struct scsi_cmnd *);
247int fnic_host_reset(struct scsi_cmnd *);
248int fnic_reset(struct Scsi_Host *);
249void fnic_scsi_cleanup(struct fc_lport *);
250void fnic_scsi_abort_io(struct fc_lport *);
251void fnic_empty_scsi_cleanup(struct fc_lport *);
252void fnic_exch_mgr_reset(struct fc_lport *, u32, u32);
253int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int);
254int fnic_wq_cmpl_handler(struct fnic *fnic, int);
255int fnic_flogi_reg_handler(struct fnic *fnic);
256void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
257 struct fcpio_host_req *desc);
258int fnic_fw_reset_handler(struct fnic *fnic);
259void fnic_terminate_rport_io(struct fc_rport *);
260const char *fnic_state_to_str(unsigned int state);
261
262void fnic_log_q_error(struct fnic *fnic);
263void fnic_handle_link_event(struct fnic *fnic);
264
265#endif /* _FNIC_H_ */
diff --git a/drivers/scsi/fnic/fnic_attrs.c b/drivers/scsi/fnic/fnic_attrs.c
new file mode 100644
index 000000000000..aea0c3becfd4
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_attrs.c
@@ -0,0 +1,56 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#include <linux/string.h>
19#include <linux/device.h>
20#include <scsi/scsi_host.h>
21#include "fnic.h"
22
23static ssize_t fnic_show_state(struct device *dev,
24 struct device_attribute *attr, char *buf)
25{
26 struct fc_lport *lp = shost_priv(class_to_shost(dev));
27 struct fnic *fnic = lport_priv(lp);
28
29 return snprintf(buf, PAGE_SIZE, "%s\n", fnic_state_str[fnic->state]);
30}
31
32static ssize_t fnic_show_drv_version(struct device *dev,
33 struct device_attribute *attr, char *buf)
34{
35 return snprintf(buf, PAGE_SIZE, "%s\n", DRV_VERSION);
36}
37
38static ssize_t fnic_show_link_state(struct device *dev,
39 struct device_attribute *attr, char *buf)
40{
41 struct fc_lport *lp = shost_priv(class_to_shost(dev));
42
43 return snprintf(buf, PAGE_SIZE, "%s\n", (lp->link_up)
44 ? "Link Up" : "Link Down");
45}
46
47static DEVICE_ATTR(fnic_state, S_IRUGO, fnic_show_state, NULL);
48static DEVICE_ATTR(drv_version, S_IRUGO, fnic_show_drv_version, NULL);
49static DEVICE_ATTR(link_state, S_IRUGO, fnic_show_link_state, NULL);
50
51struct device_attribute *fnic_attrs[] = {
52 &dev_attr_fnic_state,
53 &dev_attr_drv_version,
54 &dev_attr_link_state,
55 NULL,
56};
diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
new file mode 100644
index 000000000000..07e6eedb83ce
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -0,0 +1,742 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#include <linux/errno.h>
19#include <linux/pci.h>
20#include <linux/skbuff.h>
21#include <linux/interrupt.h>
22#include <linux/spinlock.h>
23#include <linux/if_ether.h>
24#include <linux/if_vlan.h>
25#include <linux/workqueue.h>
26#include <scsi/fc/fc_els.h>
27#include <scsi/fc/fc_fcoe.h>
28#include <scsi/fc_frame.h>
29#include <scsi/libfc.h>
30#include "fnic_io.h"
31#include "fnic.h"
32#include "cq_enet_desc.h"
33#include "cq_exch_desc.h"
34
35struct workqueue_struct *fnic_event_queue;
36
37void fnic_handle_link(struct work_struct *work)
38{
39 struct fnic *fnic = container_of(work, struct fnic, link_work);
40 unsigned long flags;
41 int old_link_status;
42 u32 old_link_down_cnt;
43
44 spin_lock_irqsave(&fnic->fnic_lock, flags);
45
46 if (fnic->stop_rx_link_events) {
47 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
48 return;
49 }
50
51 old_link_down_cnt = fnic->link_down_cnt;
52 old_link_status = fnic->link_status;
53 fnic->link_status = vnic_dev_link_status(fnic->vdev);
54 fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
55
56 if (old_link_status == fnic->link_status) {
57 if (!fnic->link_status)
58 /* DOWN -> DOWN */
59 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
60 else {
61 if (old_link_down_cnt != fnic->link_down_cnt) {
62 /* UP -> DOWN -> UP */
63 fnic->lport->host_stats.link_failure_count++;
64 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
65 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
66 "link down\n");
67 fc_linkdown(fnic->lport);
68 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
69 "link up\n");
70 fc_linkup(fnic->lport);
71 } else
72 /* UP -> UP */
73 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
74 }
75 } else if (fnic->link_status) {
76 /* DOWN -> UP */
77 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
78 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
79 fc_linkup(fnic->lport);
80 } else {
81 /* UP -> DOWN */
82 fnic->lport->host_stats.link_failure_count++;
83 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
84 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
85 fc_linkdown(fnic->lport);
86 }
87
88}
89
90/*
91 * This function passes incoming fabric frames to libFC
92 */
93void fnic_handle_frame(struct work_struct *work)
94{
95 struct fnic *fnic = container_of(work, struct fnic, frame_work);
96 struct fc_lport *lp = fnic->lport;
97 unsigned long flags;
98 struct sk_buff *skb;
99 struct fc_frame *fp;
100
101 while ((skb = skb_dequeue(&fnic->frame_queue))) {
102
103 spin_lock_irqsave(&fnic->fnic_lock, flags);
104 if (fnic->stop_rx_link_events) {
105 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
106 dev_kfree_skb(skb);
107 return;
108 }
109 fp = (struct fc_frame *)skb;
110 /* if Flogi resp frame, register the address */
111 if (fr_flags(fp)) {
112 vnic_dev_add_addr(fnic->vdev,
113 fnic->data_src_addr);
114 fr_flags(fp) = 0;
115 }
116 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
117
118 fc_exch_recv(lp, lp->emp, fp);
119 }
120
121}
122
123static inline void fnic_import_rq_fc_frame(struct sk_buff *skb,
124 u32 len, u8 sof, u8 eof)
125{
126 struct fc_frame *fp = (struct fc_frame *)skb;
127
128 skb_trim(skb, len);
129 fr_eof(fp) = eof;
130 fr_sof(fp) = sof;
131}
132
133
134static inline int fnic_import_rq_eth_pkt(struct sk_buff *skb, u32 len)
135{
136 struct fc_frame *fp;
137 struct ethhdr *eh;
138 struct vlan_ethhdr *vh;
139 struct fcoe_hdr *fcoe_hdr;
140 struct fcoe_crc_eof *ft;
141 u32 transport_len = 0;
142
143 eh = (struct ethhdr *)skb->data;
144 vh = (struct vlan_ethhdr *)skb->data;
145 if (vh->h_vlan_proto == htons(ETH_P_8021Q) &&
146 vh->h_vlan_encapsulated_proto == htons(ETH_P_FCOE)) {
147 skb_pull(skb, sizeof(struct vlan_ethhdr));
148 transport_len += sizeof(struct vlan_ethhdr);
149 } else if (eh->h_proto == htons(ETH_P_FCOE)) {
150 transport_len += sizeof(struct ethhdr);
151 skb_pull(skb, sizeof(struct ethhdr));
152 } else
153 return -1;
154
155 fcoe_hdr = (struct fcoe_hdr *)skb->data;
156 if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
157 return -1;
158
159 fp = (struct fc_frame *)skb;
160 fc_frame_init(fp);
161 fr_sof(fp) = fcoe_hdr->fcoe_sof;
162 skb_pull(skb, sizeof(struct fcoe_hdr));
163 transport_len += sizeof(struct fcoe_hdr);
164
165 ft = (struct fcoe_crc_eof *)(skb->data + len -
166 transport_len - sizeof(*ft));
167 fr_eof(fp) = ft->fcoe_eof;
168 skb_trim(skb, len - transport_len - sizeof(*ft));
169 return 0;
170}
171
172static inline int fnic_handle_flogi_resp(struct fnic *fnic,
173 struct fc_frame *fp)
174{
175 u8 mac[ETH_ALEN] = FC_FCOE_FLOGI_MAC;
176 struct ethhdr *eth_hdr;
177 struct fc_frame_header *fh;
178 int ret = 0;
179 unsigned long flags;
180 struct fc_frame *old_flogi_resp = NULL;
181
182 fh = (struct fc_frame_header *)fr_hdr(fp);
183
184 spin_lock_irqsave(&fnic->fnic_lock, flags);
185
186 if (fnic->state == FNIC_IN_ETH_MODE) {
187
188 /*
189 * Check if oxid matches on taking the lock. A new Flogi
190 * issued by libFC might have changed the fnic cached oxid
191 */
192 if (fnic->flogi_oxid != ntohs(fh->fh_ox_id)) {
193 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
194 "Flogi response oxid not"
195 " matching cached oxid, dropping frame"
196 "\n");
197 ret = -1;
198 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
199 dev_kfree_skb_irq(fp_skb(fp));
200 goto handle_flogi_resp_end;
201 }
202
203 /* Drop older cached flogi response frame, cache this frame */
204 old_flogi_resp = fnic->flogi_resp;
205 fnic->flogi_resp = fp;
206 fnic->flogi_oxid = FC_XID_UNKNOWN;
207
208 /*
209 * this frame is part of flogi get the src mac addr from this
210 * frame if the src mac is fcoui based then we mark the
211 * address mode flag to use fcoui base for dst mac addr
212 * otherwise we have to store the fcoe gateway addr
213 */
214 eth_hdr = (struct ethhdr *)skb_mac_header(fp_skb(fp));
215 memcpy(mac, eth_hdr->h_source, ETH_ALEN);
216
217 if (ntoh24(mac) == FC_FCOE_OUI)
218 fnic->fcoui_mode = 1;
219 else {
220 fnic->fcoui_mode = 0;
221 memcpy(fnic->dest_addr, mac, ETH_ALEN);
222 }
223
224 /*
225 * Except for Flogi frame, all outbound frames from us have the
226 * Eth Src address as FC_FCOE_OUI"our_sid". Flogi frame uses
227 * the vnic MAC address as the Eth Src address
228 */
229 fc_fcoe_set_mac(fnic->data_src_addr, fh->fh_d_id);
230
231 /* We get our s_id from the d_id of the flogi resp frame */
232 fnic->s_id = ntoh24(fh->fh_d_id);
233
234 /* Change state to reflect transition from Eth to FC mode */
235 fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
236
237 } else {
238 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
239 "Unexpected fnic state %s while"
240 " processing flogi resp\n",
241 fnic_state_to_str(fnic->state));
242 ret = -1;
243 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
244 dev_kfree_skb_irq(fp_skb(fp));
245 goto handle_flogi_resp_end;
246 }
247
248 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
249
250 /* Drop older cached frame */
251 if (old_flogi_resp)
252 dev_kfree_skb_irq(fp_skb(old_flogi_resp));
253
254 /*
255 * send flogi reg request to firmware, this will put the fnic in
256 * in FC mode
257 */
258 ret = fnic_flogi_reg_handler(fnic);
259
260 if (ret < 0) {
261 int free_fp = 1;
262 spin_lock_irqsave(&fnic->fnic_lock, flags);
263 /*
264 * free the frame is some other thread is not
265 * pointing to it
266 */
267 if (fnic->flogi_resp != fp)
268 free_fp = 0;
269 else
270 fnic->flogi_resp = NULL;
271
272 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
273 fnic->state = FNIC_IN_ETH_MODE;
274 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
275 if (free_fp)
276 dev_kfree_skb_irq(fp_skb(fp));
277 }
278
279 handle_flogi_resp_end:
280 return ret;
281}
282
283/* Returns 1 for a response that matches cached flogi oxid */
284static inline int is_matching_flogi_resp_frame(struct fnic *fnic,
285 struct fc_frame *fp)
286{
287 struct fc_frame_header *fh;
288 int ret = 0;
289 u32 f_ctl;
290
291 fh = fc_frame_header_get(fp);
292 f_ctl = ntoh24(fh->fh_f_ctl);
293
294 if (fnic->flogi_oxid == ntohs(fh->fh_ox_id) &&
295 fh->fh_r_ctl == FC_RCTL_ELS_REP &&
296 (f_ctl & (FC_FC_EX_CTX | FC_FC_SEQ_CTX)) == FC_FC_EX_CTX &&
297 fh->fh_type == FC_TYPE_ELS)
298 ret = 1;
299
300 return ret;
301}
302
303static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
304 *cq_desc, struct vnic_rq_buf *buf,
305 int skipped __attribute__((unused)),
306 void *opaque)
307{
308 struct fnic *fnic = vnic_dev_priv(rq->vdev);
309 struct sk_buff *skb;
310 struct fc_frame *fp;
311 unsigned int eth_hdrs_stripped;
312 u8 type, color, eop, sop, ingress_port, vlan_stripped;
313 u8 fcoe = 0, fcoe_sof, fcoe_eof;
314 u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
315 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
316 u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
317 u8 fcs_ok = 1, packet_error = 0;
318 u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
319 u32 rss_hash;
320 u16 exchange_id, tmpl;
321 u8 sof = 0;
322 u8 eof = 0;
323 u32 fcp_bytes_written = 0;
324 unsigned long flags;
325
326 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
327 PCI_DMA_FROMDEVICE);
328 skb = buf->os_buf;
329 buf->os_buf = NULL;
330
331 cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
332 if (type == CQ_DESC_TYPE_RQ_FCP) {
333 cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
334 &type, &color, &q_number, &completed_index,
335 &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
336 &tmpl, &fcp_bytes_written, &sof, &eof,
337 &ingress_port, &packet_error,
338 &fcoe_enc_error, &fcs_ok, &vlan_stripped,
339 &vlan);
340 eth_hdrs_stripped = 1;
341
342 } else if (type == CQ_DESC_TYPE_RQ_ENET) {
343 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
344 &type, &color, &q_number, &completed_index,
345 &ingress_port, &fcoe, &eop, &sop,
346 &rss_type, &csum_not_calc, &rss_hash,
347 &bytes_written, &packet_error,
348 &vlan_stripped, &vlan, &checksum,
349 &fcoe_sof, &fcoe_fc_crc_ok,
350 &fcoe_enc_error, &fcoe_eof,
351 &tcp_udp_csum_ok, &udp, &tcp,
352 &ipv4_csum_ok, &ipv6, &ipv4,
353 &ipv4_fragment, &fcs_ok);
354 eth_hdrs_stripped = 0;
355
356 } else {
357 /* wrong CQ type*/
358 shost_printk(KERN_ERR, fnic->lport->host,
359 "fnic rq_cmpl wrong cq type x%x\n", type);
360 goto drop;
361 }
362
363 if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
364 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
365 "fnic rq_cmpl fcoe x%x fcsok x%x"
366 " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
367 " x%x\n",
368 fcoe, fcs_ok, packet_error,
369 fcoe_fc_crc_ok, fcoe_enc_error);
370 goto drop;
371 }
372
373 if (eth_hdrs_stripped)
374 fnic_import_rq_fc_frame(skb, fcp_bytes_written, sof, eof);
375 else if (fnic_import_rq_eth_pkt(skb, bytes_written))
376 goto drop;
377
378 fp = (struct fc_frame *)skb;
379
380 /*
381 * If frame is an ELS response that matches the cached FLOGI OX_ID,
382 * and is accept, issue flogi_reg_request copy wq request to firmware
383 * to register the S_ID and determine whether FC_OUI mode or GW mode.
384 */
385 if (is_matching_flogi_resp_frame(fnic, fp)) {
386 if (!eth_hdrs_stripped) {
387 if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
388 fnic_handle_flogi_resp(fnic, fp);
389 return;
390 }
391 /*
392 * Recd. Flogi reject. No point registering
393 * with fw, but forward to libFC
394 */
395 goto forward;
396 }
397 goto drop;
398 }
399 if (!eth_hdrs_stripped)
400 goto drop;
401
402forward:
403 spin_lock_irqsave(&fnic->fnic_lock, flags);
404 if (fnic->stop_rx_link_events) {
405 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
406 goto drop;
407 }
408 /* Use fr_flags to indicate whether succ. flogi resp or not */
409 fr_flags(fp) = 0;
410 fr_dev(fp) = fnic->lport;
411 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
412
413 skb_queue_tail(&fnic->frame_queue, skb);
414 queue_work(fnic_event_queue, &fnic->frame_work);
415
416 return;
417drop:
418 dev_kfree_skb_irq(skb);
419}
420
421static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
422 struct cq_desc *cq_desc, u8 type,
423 u16 q_number, u16 completed_index,
424 void *opaque)
425{
426 struct fnic *fnic = vnic_dev_priv(vdev);
427
428 vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
429 VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
430 NULL);
431 return 0;
432}
433
434int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
435{
436 unsigned int tot_rq_work_done = 0, cur_work_done;
437 unsigned int i;
438 int err;
439
440 for (i = 0; i < fnic->rq_count; i++) {
441 cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
442 fnic_rq_cmpl_handler_cont,
443 NULL);
444 if (cur_work_done) {
445 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
446 if (err)
447 shost_printk(KERN_ERR, fnic->lport->host,
448 "fnic_alloc_rq_frame cant alloc"
449 " frame\n");
450 }
451 tot_rq_work_done += cur_work_done;
452 }
453
454 return tot_rq_work_done;
455}
456
457/*
458 * This function is called once at init time to allocate and fill RQ
459 * buffers. Subsequently, it is called in the interrupt context after RQ
460 * buffer processing to replenish the buffers in the RQ
461 */
462int fnic_alloc_rq_frame(struct vnic_rq *rq)
463{
464 struct fnic *fnic = vnic_dev_priv(rq->vdev);
465 struct sk_buff *skb;
466 u16 len;
467 dma_addr_t pa;
468
469 len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
470 skb = dev_alloc_skb(len);
471 if (!skb) {
472 FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
473 "Unable to allocate RQ sk_buff\n");
474 return -ENOMEM;
475 }
476 skb_reset_mac_header(skb);
477 skb_reset_transport_header(skb);
478 skb_reset_network_header(skb);
479 skb_put(skb, len);
480 pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
481 fnic_queue_rq_desc(rq, skb, pa, len);
482 return 0;
483}
484
485void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
486{
487 struct fc_frame *fp = buf->os_buf;
488 struct fnic *fnic = vnic_dev_priv(rq->vdev);
489
490 pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
491 PCI_DMA_FROMDEVICE);
492
493 dev_kfree_skb(fp_skb(fp));
494 buf->os_buf = NULL;
495}
496
497static inline int is_flogi_frame(struct fc_frame_header *fh)
498{
499 return fh->fh_r_ctl == FC_RCTL_ELS_REQ && *(u8 *)(fh + 1) == ELS_FLOGI;
500}
501
502int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
503{
504 struct vnic_wq *wq = &fnic->wq[0];
505 struct sk_buff *skb;
506 dma_addr_t pa;
507 struct ethhdr *eth_hdr;
508 struct vlan_ethhdr *vlan_hdr;
509 struct fcoe_hdr *fcoe_hdr;
510 struct fc_frame_header *fh;
511 u32 tot_len, eth_hdr_len;
512 int ret = 0;
513 unsigned long flags;
514
515 fh = fc_frame_header_get(fp);
516 skb = fp_skb(fp);
517
518 if (!fnic->vlan_hw_insert) {
519 eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
520 vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
521 eth_hdr = (struct ethhdr *)vlan_hdr;
522 vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
523 vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
524 vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
525 fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
526 } else {
527 eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
528 eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
529 eth_hdr->h_proto = htons(ETH_P_FCOE);
530 fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
531 }
532
533 if (is_flogi_frame(fh)) {
534 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
535 memcpy(eth_hdr->h_source, fnic->mac_addr, ETH_ALEN);
536 } else {
537 if (fnic->fcoui_mode)
538 fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
539 else
540 memcpy(eth_hdr->h_dest, fnic->dest_addr, ETH_ALEN);
541 memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
542 }
543
544 tot_len = skb->len;
545 BUG_ON(tot_len % 4);
546
547 memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
548 fcoe_hdr->fcoe_sof = fr_sof(fp);
549 if (FC_FCOE_VER)
550 FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
551
552 pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
553
554 spin_lock_irqsave(&fnic->wq_lock[0], flags);
555
556 if (!vnic_wq_desc_avail(wq)) {
557 pci_unmap_single(fnic->pdev, pa,
558 tot_len, PCI_DMA_TODEVICE);
559 ret = -1;
560 goto fnic_send_frame_end;
561 }
562
563 fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
564 fnic->vlan_hw_insert, fnic->vlan_id, 1, 1, 1);
565fnic_send_frame_end:
566 spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
567
568 if (ret)
569 dev_kfree_skb_any(fp_skb(fp));
570
571 return ret;
572}
573
574/*
575 * fnic_send
576 * Routine to send a raw frame
577 */
578int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
579{
580 struct fnic *fnic = lport_priv(lp);
581 struct fc_frame_header *fh;
582 int ret = 0;
583 enum fnic_state old_state;
584 unsigned long flags;
585 struct fc_frame *old_flogi = NULL;
586 struct fc_frame *old_flogi_resp = NULL;
587
588 if (fnic->in_remove) {
589 dev_kfree_skb(fp_skb(fp));
590 ret = -1;
591 goto fnic_send_end;
592 }
593
594 fh = fc_frame_header_get(fp);
595 /* if not an Flogi frame, send it out, this is the common case */
596 if (!is_flogi_frame(fh))
597 return fnic_send_frame(fnic, fp);
598
599 /* Flogi frame, now enter the state machine */
600
601 spin_lock_irqsave(&fnic->fnic_lock, flags);
602again:
603 /* Get any old cached frames, free them after dropping lock */
604 old_flogi = fnic->flogi;
605 fnic->flogi = NULL;
606 old_flogi_resp = fnic->flogi_resp;
607 fnic->flogi_resp = NULL;
608
609 fnic->flogi_oxid = FC_XID_UNKNOWN;
610
611 old_state = fnic->state;
612 switch (old_state) {
613 case FNIC_IN_FC_MODE:
614 case FNIC_IN_ETH_TRANS_FC_MODE:
615 default:
616 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
617 vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
618 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
619
620 if (old_flogi) {
621 dev_kfree_skb(fp_skb(old_flogi));
622 old_flogi = NULL;
623 }
624 if (old_flogi_resp) {
625 dev_kfree_skb(fp_skb(old_flogi_resp));
626 old_flogi_resp = NULL;
627 }
628
629 ret = fnic_fw_reset_handler(fnic);
630
631 spin_lock_irqsave(&fnic->fnic_lock, flags);
632 if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
633 goto again;
634 if (ret) {
635 fnic->state = old_state;
636 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
637 dev_kfree_skb(fp_skb(fp));
638 goto fnic_send_end;
639 }
640 old_flogi = fnic->flogi;
641 fnic->flogi = fp;
642 fnic->flogi_oxid = ntohs(fh->fh_ox_id);
643 old_flogi_resp = fnic->flogi_resp;
644 fnic->flogi_resp = NULL;
645 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
646 break;
647
648 case FNIC_IN_FC_TRANS_ETH_MODE:
649 /*
650 * A reset is pending with the firmware. Store the flogi
651 * and its oxid. The transition out of this state happens
652 * only when Firmware completes the reset, either with
653 * success or failed. If success, transition to
654 * FNIC_IN_ETH_MODE, if fail, then transition to
655 * FNIC_IN_FC_MODE
656 */
657 fnic->flogi = fp;
658 fnic->flogi_oxid = ntohs(fh->fh_ox_id);
659 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
660 break;
661
662 case FNIC_IN_ETH_MODE:
663 /*
664 * The fw/hw is already in eth mode. Store the oxid,
665 * and send the flogi frame out. The transition out of this
666 * state happens only we receive flogi response from the
667 * network, and the oxid matches the cached oxid when the
668 * flogi frame was sent out. If they match, then we issue
669 * a flogi_reg request and transition to state
670 * FNIC_IN_ETH_TRANS_FC_MODE
671 */
672 fnic->flogi_oxid = ntohs(fh->fh_ox_id);
673 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
674 ret = fnic_send_frame(fnic, fp);
675 break;
676 }
677
678fnic_send_end:
679 if (old_flogi)
680 dev_kfree_skb(fp_skb(old_flogi));
681 if (old_flogi_resp)
682 dev_kfree_skb(fp_skb(old_flogi_resp));
683 return ret;
684}
685
686static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
687 struct cq_desc *cq_desc,
688 struct vnic_wq_buf *buf, void *opaque)
689{
690 struct sk_buff *skb = buf->os_buf;
691 struct fc_frame *fp = (struct fc_frame *)skb;
692 struct fnic *fnic = vnic_dev_priv(wq->vdev);
693
694 pci_unmap_single(fnic->pdev, buf->dma_addr,
695 buf->len, PCI_DMA_TODEVICE);
696 dev_kfree_skb_irq(fp_skb(fp));
697 buf->os_buf = NULL;
698}
699
700static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
701 struct cq_desc *cq_desc, u8 type,
702 u16 q_number, u16 completed_index,
703 void *opaque)
704{
705 struct fnic *fnic = vnic_dev_priv(vdev);
706 unsigned long flags;
707
708 spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
709 vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
710 fnic_wq_complete_frame_send, NULL);
711 spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
712
713 return 0;
714}
715
716int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
717{
718 unsigned int wq_work_done = 0;
719 unsigned int i;
720
721 for (i = 0; i < fnic->raw_wq_count; i++) {
722 wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
723 work_to_do,
724 fnic_wq_cmpl_handler_cont,
725 NULL);
726 }
727
728 return wq_work_done;
729}
730
731
732void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
733{
734 struct fc_frame *fp = buf->os_buf;
735 struct fnic *fnic = vnic_dev_priv(wq->vdev);
736
737 pci_unmap_single(fnic->pdev, buf->dma_addr,
738 buf->len, PCI_DMA_TODEVICE);
739
740 dev_kfree_skb(fp_skb(fp));
741 buf->os_buf = NULL;
742}
diff --git a/drivers/scsi/fnic/fnic_io.h b/drivers/scsi/fnic/fnic_io.h
new file mode 100644
index 000000000000..f0b896988cd5
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_io.h
@@ -0,0 +1,67 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _FNIC_IO_H_
19#define _FNIC_IO_H_
20
21#include <scsi/fc/fc_fcp.h>
22
23#define FNIC_DFLT_SG_DESC_CNT 32
24#define FNIC_MAX_SG_DESC_CNT 1024 /* Maximum descriptors per sgl */
25#define FNIC_SG_DESC_ALIGN 16 /* Descriptor address alignment */
26
27struct host_sg_desc {
28 __le64 addr;
29 __le32 len;
30 u32 _resvd;
31};
32
33struct fnic_dflt_sgl_list {
34 struct host_sg_desc sg_desc[FNIC_DFLT_SG_DESC_CNT];
35};
36
37struct fnic_sgl_list {
38 struct host_sg_desc sg_desc[FNIC_MAX_SG_DESC_CNT];
39};
40
41enum fnic_sgl_list_type {
42 FNIC_SGL_CACHE_DFLT = 0, /* cache with default size sgl */
43 FNIC_SGL_CACHE_MAX, /* cache with max size sgl */
44 FNIC_SGL_NUM_CACHES /* number of sgl caches */
45};
46
47enum fnic_ioreq_state {
48 FNIC_IOREQ_CMD_PENDING = 0,
49 FNIC_IOREQ_ABTS_PENDING,
50 FNIC_IOREQ_ABTS_COMPLETE,
51 FNIC_IOREQ_CMD_COMPLETE,
52};
53
54struct fnic_io_req {
55 struct host_sg_desc *sgl_list; /* sgl list */
56 void *sgl_list_alloc; /* sgl list address used for free */
57 dma_addr_t sense_buf_pa; /* dma address for sense buffer*/
58 dma_addr_t sgl_list_pa; /* dma address for sgl list */
59 u16 sgl_cnt;
60 u8 sgl_type; /* device DMA descriptor list type */
61 u8 io_completed:1; /* set to 1 when fw completes IO */
62 u32 port_id; /* remote port DID */
63 struct completion *abts_done; /* completion for abts */
64 struct completion *dr_done; /* completion for device reset */
65};
66
67#endif /* _FNIC_IO_H_ */
diff --git a/drivers/scsi/fnic/fnic_isr.c b/drivers/scsi/fnic/fnic_isr.c
new file mode 100644
index 000000000000..2b3064828aea
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_isr.c
@@ -0,0 +1,332 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#include <linux/string.h>
19#include <linux/errno.h>
20#include <linux/pci.h>
21#include <linux/interrupt.h>
22#include <scsi/libfc.h>
23#include <scsi/fc_frame.h>
24#include "vnic_dev.h"
25#include "vnic_intr.h"
26#include "vnic_stats.h"
27#include "fnic_io.h"
28#include "fnic.h"
29
30static irqreturn_t fnic_isr_legacy(int irq, void *data)
31{
32 struct fnic *fnic = data;
33 u32 pba;
34 unsigned long work_done = 0;
35
36 pba = vnic_intr_legacy_pba(fnic->legacy_pba);
37 if (!pba)
38 return IRQ_NONE;
39
40 if (pba & (1 << FNIC_INTX_NOTIFY)) {
41 vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_NOTIFY]);
42 fnic_handle_link_event(fnic);
43 }
44
45 if (pba & (1 << FNIC_INTX_ERR)) {
46 vnic_intr_return_all_credits(&fnic->intr[FNIC_INTX_ERR]);
47 fnic_log_q_error(fnic);
48 }
49
50 if (pba & (1 << FNIC_INTX_WQ_RQ_COPYWQ)) {
51 work_done += fnic_wq_copy_cmpl_handler(fnic, 8);
52 work_done += fnic_wq_cmpl_handler(fnic, 4);
53 work_done += fnic_rq_cmpl_handler(fnic, 4);
54
55 vnic_intr_return_credits(&fnic->intr[FNIC_INTX_WQ_RQ_COPYWQ],
56 work_done,
57 1 /* unmask intr */,
58 1 /* reset intr timer */);
59 }
60
61 return IRQ_HANDLED;
62}
63
64static irqreturn_t fnic_isr_msi(int irq, void *data)
65{
66 struct fnic *fnic = data;
67 unsigned long work_done = 0;
68
69 work_done += fnic_wq_copy_cmpl_handler(fnic, 8);
70 work_done += fnic_wq_cmpl_handler(fnic, 4);
71 work_done += fnic_rq_cmpl_handler(fnic, 4);
72
73 vnic_intr_return_credits(&fnic->intr[0],
74 work_done,
75 1 /* unmask intr */,
76 1 /* reset intr timer */);
77
78 return IRQ_HANDLED;
79}
80
81static irqreturn_t fnic_isr_msix_rq(int irq, void *data)
82{
83 struct fnic *fnic = data;
84 unsigned long rq_work_done = 0;
85
86 rq_work_done = fnic_rq_cmpl_handler(fnic, 4);
87 vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_RQ],
88 rq_work_done,
89 1 /* unmask intr */,
90 1 /* reset intr timer */);
91
92 return IRQ_HANDLED;
93}
94
95static irqreturn_t fnic_isr_msix_wq(int irq, void *data)
96{
97 struct fnic *fnic = data;
98 unsigned long wq_work_done = 0;
99
100 wq_work_done = fnic_wq_cmpl_handler(fnic, 4);
101 vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_WQ],
102 wq_work_done,
103 1 /* unmask intr */,
104 1 /* reset intr timer */);
105 return IRQ_HANDLED;
106}
107
108static irqreturn_t fnic_isr_msix_wq_copy(int irq, void *data)
109{
110 struct fnic *fnic = data;
111 unsigned long wq_copy_work_done = 0;
112
113 wq_copy_work_done = fnic_wq_copy_cmpl_handler(fnic, 8);
114 vnic_intr_return_credits(&fnic->intr[FNIC_MSIX_WQ_COPY],
115 wq_copy_work_done,
116 1 /* unmask intr */,
117 1 /* reset intr timer */);
118 return IRQ_HANDLED;
119}
120
121static irqreturn_t fnic_isr_msix_err_notify(int irq, void *data)
122{
123 struct fnic *fnic = data;
124
125 vnic_intr_return_all_credits(&fnic->intr[FNIC_MSIX_ERR_NOTIFY]);
126 fnic_log_q_error(fnic);
127 fnic_handle_link_event(fnic);
128
129 return IRQ_HANDLED;
130}
131
132void fnic_free_intr(struct fnic *fnic)
133{
134 int i;
135
136 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
137 case VNIC_DEV_INTR_MODE_INTX:
138 case VNIC_DEV_INTR_MODE_MSI:
139 free_irq(fnic->pdev->irq, fnic);
140 break;
141
142 case VNIC_DEV_INTR_MODE_MSIX:
143 for (i = 0; i < ARRAY_SIZE(fnic->msix); i++)
144 if (fnic->msix[i].requested)
145 free_irq(fnic->msix_entry[i].vector,
146 fnic->msix[i].devid);
147 break;
148
149 default:
150 break;
151 }
152}
153
154int fnic_request_intr(struct fnic *fnic)
155{
156 int err = 0;
157 int i;
158
159 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
160
161 case VNIC_DEV_INTR_MODE_INTX:
162 err = request_irq(fnic->pdev->irq, &fnic_isr_legacy,
163 IRQF_SHARED, DRV_NAME, fnic);
164 break;
165
166 case VNIC_DEV_INTR_MODE_MSI:
167 err = request_irq(fnic->pdev->irq, &fnic_isr_msi,
168 0, fnic->name, fnic);
169 break;
170
171 case VNIC_DEV_INTR_MODE_MSIX:
172
173 sprintf(fnic->msix[FNIC_MSIX_RQ].devname,
174 "%.11s-fcs-rq", fnic->name);
175 fnic->msix[FNIC_MSIX_RQ].isr = fnic_isr_msix_rq;
176 fnic->msix[FNIC_MSIX_RQ].devid = fnic;
177
178 sprintf(fnic->msix[FNIC_MSIX_WQ].devname,
179 "%.11s-fcs-wq", fnic->name);
180 fnic->msix[FNIC_MSIX_WQ].isr = fnic_isr_msix_wq;
181 fnic->msix[FNIC_MSIX_WQ].devid = fnic;
182
183 sprintf(fnic->msix[FNIC_MSIX_WQ_COPY].devname,
184 "%.11s-scsi-wq", fnic->name);
185 fnic->msix[FNIC_MSIX_WQ_COPY].isr = fnic_isr_msix_wq_copy;
186 fnic->msix[FNIC_MSIX_WQ_COPY].devid = fnic;
187
188 sprintf(fnic->msix[FNIC_MSIX_ERR_NOTIFY].devname,
189 "%.11s-err-notify", fnic->name);
190 fnic->msix[FNIC_MSIX_ERR_NOTIFY].isr =
191 fnic_isr_msix_err_notify;
192 fnic->msix[FNIC_MSIX_ERR_NOTIFY].devid = fnic;
193
194 for (i = 0; i < ARRAY_SIZE(fnic->msix); i++) {
195 err = request_irq(fnic->msix_entry[i].vector,
196 fnic->msix[i].isr, 0,
197 fnic->msix[i].devname,
198 fnic->msix[i].devid);
199 if (err) {
200 shost_printk(KERN_ERR, fnic->lport->host,
201 "MSIX: request_irq"
202 " failed %d\n", err);
203 fnic_free_intr(fnic);
204 break;
205 }
206 fnic->msix[i].requested = 1;
207 }
208 break;
209
210 default:
211 break;
212 }
213
214 return err;
215}
216
217int fnic_set_intr_mode(struct fnic *fnic)
218{
219 unsigned int n = ARRAY_SIZE(fnic->rq);
220 unsigned int m = ARRAY_SIZE(fnic->wq);
221 unsigned int o = ARRAY_SIZE(fnic->wq_copy);
222 unsigned int i;
223
224 /*
225 * Set interrupt mode (INTx, MSI, MSI-X) depending
226 * system capabilities.
227 *
228 * Try MSI-X first
229 *
230 * We need n RQs, m WQs, o Copy WQs, n+m+o CQs, and n+m+o+1 INTRs
231 * (last INTR is used for WQ/RQ errors and notification area)
232 */
233
234 BUG_ON(ARRAY_SIZE(fnic->msix_entry) < n + m + o + 1);
235 for (i = 0; i < n + m + o + 1; i++)
236 fnic->msix_entry[i].entry = i;
237
238 if (fnic->rq_count >= n &&
239 fnic->raw_wq_count >= m &&
240 fnic->wq_copy_count >= o &&
241 fnic->cq_count >= n + m + o) {
242 if (!pci_enable_msix(fnic->pdev, fnic->msix_entry,
243 n + m + o + 1)) {
244 fnic->rq_count = n;
245 fnic->raw_wq_count = m;
246 fnic->wq_copy_count = o;
247 fnic->wq_count = m + o;
248 fnic->cq_count = n + m + o;
249 fnic->intr_count = n + m + o + 1;
250 fnic->err_intr_offset = FNIC_MSIX_ERR_NOTIFY;
251
252 FNIC_ISR_DBG(KERN_DEBUG, fnic->lport->host,
253 "Using MSI-X Interrupts\n");
254 vnic_dev_set_intr_mode(fnic->vdev,
255 VNIC_DEV_INTR_MODE_MSIX);
256 return 0;
257 }
258 }
259
260 /*
261 * Next try MSI
262 * We need 1 RQ, 1 WQ, 1 WQ_COPY, 3 CQs, and 1 INTR
263 */
264 if (fnic->rq_count >= 1 &&
265 fnic->raw_wq_count >= 1 &&
266 fnic->wq_copy_count >= 1 &&
267 fnic->cq_count >= 3 &&
268 fnic->intr_count >= 1 &&
269 !pci_enable_msi(fnic->pdev)) {
270
271 fnic->rq_count = 1;
272 fnic->raw_wq_count = 1;
273 fnic->wq_copy_count = 1;
274 fnic->wq_count = 2;
275 fnic->cq_count = 3;
276 fnic->intr_count = 1;
277 fnic->err_intr_offset = 0;
278
279 FNIC_ISR_DBG(KERN_DEBUG, fnic->lport->host,
280 "Using MSI Interrupts\n");
281 vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_MSI);
282
283 return 0;
284 }
285
286 /*
287 * Next try INTx
288 * We need 1 RQ, 1 WQ, 1 WQ_COPY, 3 CQs, and 3 INTRs
289 * 1 INTR is used for all 3 queues, 1 INTR for queue errors
290 * 1 INTR for notification area
291 */
292
293 if (fnic->rq_count >= 1 &&
294 fnic->raw_wq_count >= 1 &&
295 fnic->wq_copy_count >= 1 &&
296 fnic->cq_count >= 3 &&
297 fnic->intr_count >= 3) {
298
299 fnic->rq_count = 1;
300 fnic->raw_wq_count = 1;
301 fnic->wq_copy_count = 1;
302 fnic->cq_count = 3;
303 fnic->intr_count = 3;
304
305 FNIC_ISR_DBG(KERN_DEBUG, fnic->lport->host,
306 "Using Legacy Interrupts\n");
307 vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_INTX);
308
309 return 0;
310 }
311
312 vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
313
314 return -EINVAL;
315}
316
317void fnic_clear_intr_mode(struct fnic *fnic)
318{
319 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
320 case VNIC_DEV_INTR_MODE_MSIX:
321 pci_disable_msix(fnic->pdev);
322 break;
323 case VNIC_DEV_INTR_MODE_MSI:
324 pci_disable_msi(fnic->pdev);
325 break;
326 default:
327 break;
328 }
329
330 vnic_dev_set_intr_mode(fnic->vdev, VNIC_DEV_INTR_MODE_INTX);
331}
332
diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
new file mode 100644
index 000000000000..32ef6b87d895
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -0,0 +1,942 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#include <linux/module.h>
19#include <linux/mempool.h>
20#include <linux/string.h>
21#include <linux/errno.h>
22#include <linux/init.h>
23#include <linux/pci.h>
24#include <linux/skbuff.h>
25#include <linux/interrupt.h>
26#include <linux/spinlock.h>
27#include <linux/workqueue.h>
28#include <scsi/scsi_host.h>
29#include <scsi/scsi_transport.h>
30#include <scsi/scsi_transport_fc.h>
31#include <scsi/scsi_tcq.h>
32#include <scsi/libfc.h>
33#include <scsi/fc_frame.h>
34
35#include "vnic_dev.h"
36#include "vnic_intr.h"
37#include "vnic_stats.h"
38#include "fnic_io.h"
39#include "fnic.h"
40
41#define PCI_DEVICE_ID_CISCO_FNIC 0x0045
42
43/* Timer to poll notification area for events. Used for MSI interrupts */
44#define FNIC_NOTIFY_TIMER_PERIOD (2 * HZ)
45
46static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
47static struct kmem_cache *fnic_io_req_cache;
48LIST_HEAD(fnic_list);
49DEFINE_SPINLOCK(fnic_list_lock);
50
51/* Supported devices by fnic module */
52static struct pci_device_id fnic_id_table[] = {
53 { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
54 { 0, }
55};
56
57MODULE_DESCRIPTION(DRV_DESCRIPTION);
58MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
59 "Joseph R. Eykholt <jeykholt@cisco.com>");
60MODULE_LICENSE("GPL v2");
61MODULE_VERSION(DRV_VERSION);
62MODULE_DEVICE_TABLE(pci, fnic_id_table);
63
64unsigned int fnic_log_level;
65module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
66MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
67
68
69static struct libfc_function_template fnic_transport_template = {
70 .frame_send = fnic_send,
71 .fcp_abort_io = fnic_empty_scsi_cleanup,
72 .fcp_cleanup = fnic_empty_scsi_cleanup,
73 .exch_mgr_reset = fnic_exch_mgr_reset
74};
75
76static int fnic_slave_alloc(struct scsi_device *sdev)
77{
78 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
79 struct fc_lport *lp = shost_priv(sdev->host);
80 struct fnic *fnic = lport_priv(lp);
81
82 sdev->tagged_supported = 1;
83
84 if (!rport || fc_remote_port_chkready(rport))
85 return -ENXIO;
86
87 scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
88 rport->dev_loss_tmo = fnic->config.port_down_timeout / 1000;
89
90 return 0;
91}
92
93static struct scsi_host_template fnic_host_template = {
94 .module = THIS_MODULE,
95 .name = DRV_NAME,
96 .queuecommand = fnic_queuecommand,
97 .eh_abort_handler = fnic_abort_cmd,
98 .eh_device_reset_handler = fnic_device_reset,
99 .eh_host_reset_handler = fnic_host_reset,
100 .slave_alloc = fnic_slave_alloc,
101 .change_queue_depth = fc_change_queue_depth,
102 .change_queue_type = fc_change_queue_type,
103 .this_id = -1,
104 .cmd_per_lun = 3,
105 .can_queue = FNIC_MAX_IO_REQ,
106 .use_clustering = ENABLE_CLUSTERING,
107 .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
108 .max_sectors = 0xffff,
109 .shost_attrs = fnic_attrs,
110};
111
112static void fnic_get_host_speed(struct Scsi_Host *shost);
113static struct scsi_transport_template *fnic_fc_transport;
114static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
115
116static struct fc_function_template fnic_fc_functions = {
117
118 .show_host_node_name = 1,
119 .show_host_port_name = 1,
120 .show_host_supported_classes = 1,
121 .show_host_supported_fc4s = 1,
122 .show_host_active_fc4s = 1,
123 .show_host_maxframe_size = 1,
124 .show_host_port_id = 1,
125 .show_host_supported_speeds = 1,
126 .get_host_speed = fnic_get_host_speed,
127 .show_host_speed = 1,
128 .show_host_port_type = 1,
129 .get_host_port_state = fc_get_host_port_state,
130 .show_host_port_state = 1,
131 .show_host_symbolic_name = 1,
132 .show_rport_maxframe_size = 1,
133 .show_rport_supported_classes = 1,
134 .show_host_fabric_name = 1,
135 .show_starget_node_name = 1,
136 .show_starget_port_name = 1,
137 .show_starget_port_id = 1,
138 .show_rport_dev_loss_tmo = 1,
139 .issue_fc_host_lip = fnic_reset,
140 .get_fc_host_stats = fnic_get_stats,
141 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
142 .terminate_rport_io = fnic_terminate_rport_io,
143};
144
145static void fnic_get_host_speed(struct Scsi_Host *shost)
146{
147 struct fc_lport *lp = shost_priv(shost);
148 struct fnic *fnic = lport_priv(lp);
149 u32 port_speed = vnic_dev_port_speed(fnic->vdev);
150
151 /* Add in other values as they get defined in fw */
152 switch (port_speed) {
153 case 10000:
154 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
155 break;
156 default:
157 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
158 break;
159 }
160}
161
162static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
163{
164 int ret;
165 struct fc_lport *lp = shost_priv(host);
166 struct fnic *fnic = lport_priv(lp);
167 struct fc_host_statistics *stats = &lp->host_stats;
168 struct vnic_stats *vs;
169 unsigned long flags;
170
171 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
172 return stats;
173 fnic->stats_time = jiffies;
174
175 spin_lock_irqsave(&fnic->fnic_lock, flags);
176 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
177 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
178
179 if (ret) {
180 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
181 "fnic: Get vnic stats failed"
182 " 0x%x", ret);
183 return stats;
184 }
185 vs = fnic->stats;
186 stats->tx_frames = vs->tx.tx_unicast_frames_ok;
187 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
188 stats->rx_frames = vs->rx.rx_unicast_frames_ok;
189 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
190 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
191 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
192 stats->invalid_crc_count = vs->rx.rx_crc_errors;
193 stats->seconds_since_last_reset = (jiffies - lp->boot_time) / HZ;
194 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
195 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
196
197 return stats;
198}
199
200void fnic_log_q_error(struct fnic *fnic)
201{
202 unsigned int i;
203 u32 error_status;
204
205 for (i = 0; i < fnic->raw_wq_count; i++) {
206 error_status = ioread32(&fnic->wq[i].ctrl->error_status);
207 if (error_status)
208 shost_printk(KERN_ERR, fnic->lport->host,
209 "WQ[%d] error_status"
210 " %d\n", i, error_status);
211 }
212
213 for (i = 0; i < fnic->rq_count; i++) {
214 error_status = ioread32(&fnic->rq[i].ctrl->error_status);
215 if (error_status)
216 shost_printk(KERN_ERR, fnic->lport->host,
217 "RQ[%d] error_status"
218 " %d\n", i, error_status);
219 }
220
221 for (i = 0; i < fnic->wq_copy_count; i++) {
222 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
223 if (error_status)
224 shost_printk(KERN_ERR, fnic->lport->host,
225 "CWQ[%d] error_status"
226 " %d\n", i, error_status);
227 }
228}
229
230void fnic_handle_link_event(struct fnic *fnic)
231{
232 unsigned long flags;
233
234 spin_lock_irqsave(&fnic->fnic_lock, flags);
235 if (fnic->stop_rx_link_events) {
236 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
237 return;
238 }
239 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
240
241 queue_work(fnic_event_queue, &fnic->link_work);
242
243}
244
245static int fnic_notify_set(struct fnic *fnic)
246{
247 int err;
248
249 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
250 case VNIC_DEV_INTR_MODE_INTX:
251 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
252 break;
253 case VNIC_DEV_INTR_MODE_MSI:
254 err = vnic_dev_notify_set(fnic->vdev, -1);
255 break;
256 case VNIC_DEV_INTR_MODE_MSIX:
257 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
258 break;
259 default:
260 shost_printk(KERN_ERR, fnic->lport->host,
261 "Interrupt mode should be set up"
262 " before devcmd notify set %d\n",
263 vnic_dev_get_intr_mode(fnic->vdev));
264 err = -1;
265 break;
266 }
267
268 return err;
269}
270
271static void fnic_notify_timer(unsigned long data)
272{
273 struct fnic *fnic = (struct fnic *)data;
274
275 fnic_handle_link_event(fnic);
276 mod_timer(&fnic->notify_timer,
277 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
278}
279
280static void fnic_notify_timer_start(struct fnic *fnic)
281{
282 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
283 case VNIC_DEV_INTR_MODE_MSI:
284 /*
285 * Schedule first timeout immediately. The driver is
286 * initiatialized and ready to look for link up notification
287 */
288 mod_timer(&fnic->notify_timer, jiffies);
289 break;
290 default:
291 /* Using intr for notification for INTx/MSI-X */
292 break;
293 };
294}
295
296static int fnic_dev_wait(struct vnic_dev *vdev,
297 int (*start)(struct vnic_dev *, int),
298 int (*finished)(struct vnic_dev *, int *),
299 int arg)
300{
301 unsigned long time;
302 int done;
303 int err;
304
305 err = start(vdev, arg);
306 if (err)
307 return err;
308
309 /* Wait for func to complete...2 seconds max */
310 time = jiffies + (HZ * 2);
311 do {
312 err = finished(vdev, &done);
313 if (err)
314 return err;
315 if (done)
316 return 0;
317 schedule_timeout_uninterruptible(HZ / 10);
318 } while (time_after(time, jiffies));
319
320 return -ETIMEDOUT;
321}
322
323static int fnic_cleanup(struct fnic *fnic)
324{
325 unsigned int i;
326 int err;
327 unsigned long flags;
328 struct fc_frame *flogi = NULL;
329 struct fc_frame *flogi_resp = NULL;
330
331 vnic_dev_disable(fnic->vdev);
332 for (i = 0; i < fnic->intr_count; i++)
333 vnic_intr_mask(&fnic->intr[i]);
334
335 for (i = 0; i < fnic->rq_count; i++) {
336 err = vnic_rq_disable(&fnic->rq[i]);
337 if (err)
338 return err;
339 }
340 for (i = 0; i < fnic->raw_wq_count; i++) {
341 err = vnic_wq_disable(&fnic->wq[i]);
342 if (err)
343 return err;
344 }
345 for (i = 0; i < fnic->wq_copy_count; i++) {
346 err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
347 if (err)
348 return err;
349 }
350
351 /* Clean up completed IOs and FCS frames */
352 fnic_wq_copy_cmpl_handler(fnic, -1);
353 fnic_wq_cmpl_handler(fnic, -1);
354 fnic_rq_cmpl_handler(fnic, -1);
355
356 /* Clean up the IOs and FCS frames that have not completed */
357 for (i = 0; i < fnic->raw_wq_count; i++)
358 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
359 for (i = 0; i < fnic->rq_count; i++)
360 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
361 for (i = 0; i < fnic->wq_copy_count; i++)
362 vnic_wq_copy_clean(&fnic->wq_copy[i],
363 fnic_wq_copy_cleanup_handler);
364
365 for (i = 0; i < fnic->cq_count; i++)
366 vnic_cq_clean(&fnic->cq[i]);
367 for (i = 0; i < fnic->intr_count; i++)
368 vnic_intr_clean(&fnic->intr[i]);
369
370 /*
371 * Remove cached flogi and flogi resp frames if any
372 * These frames are not in any queue, and therefore queue
373 * cleanup does not clean them. So clean them explicitly
374 */
375 spin_lock_irqsave(&fnic->fnic_lock, flags);
376 flogi = fnic->flogi;
377 fnic->flogi = NULL;
378 flogi_resp = fnic->flogi_resp;
379 fnic->flogi_resp = NULL;
380 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
381
382 if (flogi)
383 dev_kfree_skb(fp_skb(flogi));
384
385 if (flogi_resp)
386 dev_kfree_skb(fp_skb(flogi_resp));
387
388 mempool_destroy(fnic->io_req_pool);
389 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
390 mempool_destroy(fnic->io_sgl_pool[i]);
391
392 return 0;
393}
394
395static void fnic_iounmap(struct fnic *fnic)
396{
397 if (fnic->bar0.vaddr)
398 iounmap(fnic->bar0.vaddr);
399}
400
401/*
402 * Allocate element for mempools requiring GFP_DMA flag.
403 * Otherwise, checks in kmem_flagcheck() hit BUG_ON().
404 */
405static void *fnic_alloc_slab_dma(gfp_t gfp_mask, void *pool_data)
406{
407 struct kmem_cache *mem = pool_data;
408
409 return kmem_cache_alloc(mem, gfp_mask | GFP_ATOMIC | GFP_DMA);
410}
411
412static int __devinit fnic_probe(struct pci_dev *pdev,
413 const struct pci_device_id *ent)
414{
415 struct Scsi_Host *host;
416 struct fc_lport *lp;
417 struct fnic *fnic;
418 mempool_t *pool;
419 int err;
420 int i;
421 unsigned long flags;
422
423 /*
424 * Allocate SCSI Host and set up association between host,
425 * local port, and fnic
426 */
427 host = scsi_host_alloc(&fnic_host_template,
428 sizeof(struct fc_lport) + sizeof(struct fnic));
429 if (!host) {
430 printk(KERN_ERR PFX "Unable to alloc SCSI host\n");
431 err = -ENOMEM;
432 goto err_out;
433 }
434 lp = shost_priv(host);
435 lp->host = host;
436 fnic = lport_priv(lp);
437 fnic->lport = lp;
438
439 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
440 host->host_no);
441
442 host->transportt = fnic_fc_transport;
443
444 err = scsi_init_shared_tag_map(host, FNIC_MAX_IO_REQ);
445 if (err) {
446 shost_printk(KERN_ERR, fnic->lport->host,
447 "Unable to alloc shared tag map\n");
448 goto err_out_free_hba;
449 }
450
451 /* Setup PCI resources */
452 pci_set_drvdata(pdev, fnic);
453
454 fnic->pdev = pdev;
455
456 err = pci_enable_device(pdev);
457 if (err) {
458 shost_printk(KERN_ERR, fnic->lport->host,
459 "Cannot enable PCI device, aborting.\n");
460 goto err_out_free_hba;
461 }
462
463 err = pci_request_regions(pdev, DRV_NAME);
464 if (err) {
465 shost_printk(KERN_ERR, fnic->lport->host,
466 "Cannot enable PCI resources, aborting\n");
467 goto err_out_disable_device;
468 }
469
470 pci_set_master(pdev);
471
472 /* Query PCI controller on system for DMA addressing
473 * limitation for the device. Try 40-bit first, and
474 * fail to 32-bit.
475 */
476 err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
477 if (err) {
478 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
479 if (err) {
480 shost_printk(KERN_ERR, fnic->lport->host,
481 "No usable DMA configuration "
482 "aborting\n");
483 goto err_out_release_regions;
484 }
485 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
486 if (err) {
487 shost_printk(KERN_ERR, fnic->lport->host,
488 "Unable to obtain 32-bit DMA "
489 "for consistent allocations, aborting.\n");
490 goto err_out_release_regions;
491 }
492 } else {
493 err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
494 if (err) {
495 shost_printk(KERN_ERR, fnic->lport->host,
496 "Unable to obtain 40-bit DMA "
497 "for consistent allocations, aborting.\n");
498 goto err_out_release_regions;
499 }
500 }
501
502 /* Map vNIC resources from BAR0 */
503 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
504 shost_printk(KERN_ERR, fnic->lport->host,
505 "BAR0 not memory-map'able, aborting.\n");
506 err = -ENODEV;
507 goto err_out_release_regions;
508 }
509
510 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
511 fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
512 fnic->bar0.len = pci_resource_len(pdev, 0);
513
514 if (!fnic->bar0.vaddr) {
515 shost_printk(KERN_ERR, fnic->lport->host,
516 "Cannot memory-map BAR0 res hdr, "
517 "aborting.\n");
518 err = -ENODEV;
519 goto err_out_release_regions;
520 }
521
522 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
523 if (!fnic->vdev) {
524 shost_printk(KERN_ERR, fnic->lport->host,
525 "vNIC registration failed, "
526 "aborting.\n");
527 err = -ENODEV;
528 goto err_out_iounmap;
529 }
530
531 err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
532 vnic_dev_open_done, 0);
533 if (err) {
534 shost_printk(KERN_ERR, fnic->lport->host,
535 "vNIC dev open failed, aborting.\n");
536 goto err_out_vnic_unregister;
537 }
538
539 err = vnic_dev_init(fnic->vdev, 0);
540 if (err) {
541 shost_printk(KERN_ERR, fnic->lport->host,
542 "vNIC dev init failed, aborting.\n");
543 goto err_out_dev_close;
544 }
545
546 err = vnic_dev_mac_addr(fnic->vdev, fnic->mac_addr);
547 if (err) {
548 shost_printk(KERN_ERR, fnic->lport->host,
549 "vNIC get MAC addr failed \n");
550 goto err_out_dev_close;
551 }
552
553 /* Get vNIC configuration */
554 err = fnic_get_vnic_config(fnic);
555 if (err) {
556 shost_printk(KERN_ERR, fnic->lport->host,
557 "Get vNIC configuration failed, "
558 "aborting.\n");
559 goto err_out_dev_close;
560 }
561 host->max_lun = fnic->config.luns_per_tgt;
562 host->max_id = FNIC_MAX_FCP_TARGET;
563
564 fnic_get_res_counts(fnic);
565
566 err = fnic_set_intr_mode(fnic);
567 if (err) {
568 shost_printk(KERN_ERR, fnic->lport->host,
569 "Failed to set intr mode, "
570 "aborting.\n");
571 goto err_out_dev_close;
572 }
573
574 err = fnic_request_intr(fnic);
575 if (err) {
576 shost_printk(KERN_ERR, fnic->lport->host,
577 "Unable to request irq.\n");
578 goto err_out_clear_intr;
579 }
580
581 err = fnic_alloc_vnic_resources(fnic);
582 if (err) {
583 shost_printk(KERN_ERR, fnic->lport->host,
584 "Failed to alloc vNIC resources, "
585 "aborting.\n");
586 goto err_out_free_intr;
587 }
588
589
590 /* initialize all fnic locks */
591 spin_lock_init(&fnic->fnic_lock);
592
593 for (i = 0; i < FNIC_WQ_MAX; i++)
594 spin_lock_init(&fnic->wq_lock[i]);
595
596 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
597 spin_lock_init(&fnic->wq_copy_lock[i]);
598 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
599 fnic->fw_ack_recd[i] = 0;
600 fnic->fw_ack_index[i] = -1;
601 }
602
603 for (i = 0; i < FNIC_IO_LOCKS; i++)
604 spin_lock_init(&fnic->io_req_lock[i]);
605
606 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
607 if (!fnic->io_req_pool)
608 goto err_out_free_resources;
609
610 pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
611 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
612 if (!pool)
613 goto err_out_free_ioreq_pool;
614 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
615
616 pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
617 fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
618 if (!pool)
619 goto err_out_free_dflt_pool;
620 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
621
622 /* setup vlan config, hw inserts vlan header */
623 fnic->vlan_hw_insert = 1;
624 fnic->vlan_id = 0;
625
626 fnic->flogi_oxid = FC_XID_UNKNOWN;
627 fnic->flogi = NULL;
628 fnic->flogi_resp = NULL;
629 fnic->state = FNIC_IN_FC_MODE;
630
631 /* Enable hardware stripping of vlan header on ingress */
632 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
633
634 /* Setup notification buffer area */
635 err = fnic_notify_set(fnic);
636 if (err) {
637 shost_printk(KERN_ERR, fnic->lport->host,
638 "Failed to alloc notify buffer, aborting.\n");
639 goto err_out_free_max_pool;
640 }
641
642 /* Setup notify timer when using MSI interrupts */
643 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
644 setup_timer(&fnic->notify_timer,
645 fnic_notify_timer, (unsigned long)fnic);
646
647 /* allocate RQ buffers and post them to RQ*/
648 for (i = 0; i < fnic->rq_count; i++) {
649 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
650 if (err) {
651 shost_printk(KERN_ERR, fnic->lport->host,
652 "fnic_alloc_rq_frame can't alloc "
653 "frame\n");
654 goto err_out_free_rq_buf;
655 }
656 }
657
658 /*
659 * Initialization done with PCI system, hardware, firmware.
660 * Add host to SCSI
661 */
662 err = scsi_add_host(lp->host, &pdev->dev);
663 if (err) {
664 shost_printk(KERN_ERR, fnic->lport->host,
665 "fnic: scsi_add_host failed...exiting\n");
666 goto err_out_free_rq_buf;
667 }
668
669 /* Start local port initiatialization */
670
671 lp->link_up = 0;
672 lp->tt = fnic_transport_template;
673
674 lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
675 FCPIO_HOST_EXCH_RANGE_START,
676 FCPIO_HOST_EXCH_RANGE_END);
677 if (!lp->emp) {
678 err = -ENOMEM;
679 goto err_out_remove_scsi_host;
680 }
681
682 lp->max_retry_count = fnic->config.flogi_retries;
683 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
684 FCP_SPPF_CONF_COMPL);
685 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
686 lp->service_params |= FCP_SPPF_RETRY;
687
688 lp->boot_time = jiffies;
689 lp->e_d_tov = fnic->config.ed_tov;
690 lp->r_a_tov = fnic->config.ra_tov;
691 lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
692 fc_set_wwnn(lp, fnic->config.node_wwn);
693 fc_set_wwpn(lp, fnic->config.port_wwn);
694
695 fc_exch_init(lp);
696 fc_lport_init(lp);
697 fc_elsct_init(lp);
698 fc_rport_init(lp);
699 fc_disc_init(lp);
700
701 fc_lport_config(lp);
702
703 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
704 sizeof(struct fc_frame_header))) {
705 err = -EINVAL;
706 goto err_out_free_exch_mgr;
707 }
708 fc_host_maxframe_size(lp->host) = lp->mfs;
709
710 sprintf(fc_host_symbolic_name(lp->host),
711 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
712
713 spin_lock_irqsave(&fnic_list_lock, flags);
714 list_add_tail(&fnic->list, &fnic_list);
715 spin_unlock_irqrestore(&fnic_list_lock, flags);
716
717 INIT_WORK(&fnic->link_work, fnic_handle_link);
718 INIT_WORK(&fnic->frame_work, fnic_handle_frame);
719 skb_queue_head_init(&fnic->frame_queue);
720
721 /* Enable all queues */
722 for (i = 0; i < fnic->raw_wq_count; i++)
723 vnic_wq_enable(&fnic->wq[i]);
724 for (i = 0; i < fnic->rq_count; i++)
725 vnic_rq_enable(&fnic->rq[i]);
726 for (i = 0; i < fnic->wq_copy_count; i++)
727 vnic_wq_copy_enable(&fnic->wq_copy[i]);
728
729 fc_fabric_login(lp);
730
731 vnic_dev_enable(fnic->vdev);
732 for (i = 0; i < fnic->intr_count; i++)
733 vnic_intr_unmask(&fnic->intr[i]);
734
735 fnic_notify_timer_start(fnic);
736
737 return 0;
738
739err_out_free_exch_mgr:
740 fc_exch_mgr_free(lp->emp);
741err_out_remove_scsi_host:
742 fc_remove_host(fnic->lport->host);
743 scsi_remove_host(fnic->lport->host);
744err_out_free_rq_buf:
745 for (i = 0; i < fnic->rq_count; i++)
746 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
747 vnic_dev_notify_unset(fnic->vdev);
748err_out_free_max_pool:
749 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
750err_out_free_dflt_pool:
751 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
752err_out_free_ioreq_pool:
753 mempool_destroy(fnic->io_req_pool);
754err_out_free_resources:
755 fnic_free_vnic_resources(fnic);
756err_out_free_intr:
757 fnic_free_intr(fnic);
758err_out_clear_intr:
759 fnic_clear_intr_mode(fnic);
760err_out_dev_close:
761 vnic_dev_close(fnic->vdev);
762err_out_vnic_unregister:
763 vnic_dev_unregister(fnic->vdev);
764err_out_iounmap:
765 fnic_iounmap(fnic);
766err_out_release_regions:
767 pci_release_regions(pdev);
768err_out_disable_device:
769 pci_disable_device(pdev);
770err_out_free_hba:
771 scsi_host_put(lp->host);
772err_out:
773 return err;
774}
775
776static void __devexit fnic_remove(struct pci_dev *pdev)
777{
778 struct fnic *fnic = pci_get_drvdata(pdev);
779 unsigned long flags;
780
781 /*
782 * Mark state so that the workqueue thread stops forwarding
783 * received frames and link events to the local port. ISR and
784 * other threads that can queue work items will also stop
785 * creating work items on the fnic workqueue
786 */
787 spin_lock_irqsave(&fnic->fnic_lock, flags);
788 fnic->stop_rx_link_events = 1;
789 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
790
791 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
792 del_timer_sync(&fnic->notify_timer);
793
794 /*
795 * Flush the fnic event queue. After this call, there should
796 * be no event queued for this fnic device in the workqueue
797 */
798 flush_workqueue(fnic_event_queue);
799 skb_queue_purge(&fnic->frame_queue);
800
801 /*
802 * Log off the fabric. This stops all remote ports, dns port,
803 * logs off the fabric. This flushes all rport, disc, lport work
804 * before returning
805 */
806 fc_fabric_logoff(fnic->lport);
807
808 spin_lock_irqsave(&fnic->fnic_lock, flags);
809 fnic->in_remove = 1;
810 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
811
812 fc_lport_destroy(fnic->lport);
813
814 /*
815 * This stops the fnic device, masks all interrupts. Completed
816 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
817 * cleaned up
818 */
819 fnic_cleanup(fnic);
820
821 BUG_ON(!skb_queue_empty(&fnic->frame_queue));
822
823 spin_lock_irqsave(&fnic_list_lock, flags);
824 list_del(&fnic->list);
825 spin_unlock_irqrestore(&fnic_list_lock, flags);
826
827 fc_remove_host(fnic->lport->host);
828 scsi_remove_host(fnic->lport->host);
829 fc_exch_mgr_free(fnic->lport->emp);
830 vnic_dev_notify_unset(fnic->vdev);
831 fnic_free_vnic_resources(fnic);
832 fnic_free_intr(fnic);
833 fnic_clear_intr_mode(fnic);
834 vnic_dev_close(fnic->vdev);
835 vnic_dev_unregister(fnic->vdev);
836 fnic_iounmap(fnic);
837 pci_release_regions(pdev);
838 pci_disable_device(pdev);
839 pci_set_drvdata(pdev, NULL);
840 scsi_host_put(fnic->lport->host);
841}
842
843static struct pci_driver fnic_driver = {
844 .name = DRV_NAME,
845 .id_table = fnic_id_table,
846 .probe = fnic_probe,
847 .remove = __devexit_p(fnic_remove),
848};
849
850static int __init fnic_init_module(void)
851{
852 size_t len;
853 int err = 0;
854
855 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
856
857 /* Create a cache for allocation of default size sgls */
858 len = sizeof(struct fnic_dflt_sgl_list);
859 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
860 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
861 SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
862 NULL);
863 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
864 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
865 err = -ENOMEM;
866 goto err_create_fnic_sgl_slab_dflt;
867 }
868
869 /* Create a cache for allocation of max size sgls*/
870 len = sizeof(struct fnic_sgl_list);
871 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
872 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
873 SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
874 NULL);
875 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
876 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
877 err = -ENOMEM;
878 goto err_create_fnic_sgl_slab_max;
879 }
880
881 /* Create a cache of io_req structs for use via mempool */
882 fnic_io_req_cache = kmem_cache_create("fnic_io_req",
883 sizeof(struct fnic_io_req),
884 0, SLAB_HWCACHE_ALIGN, NULL);
885 if (!fnic_io_req_cache) {
886 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
887 err = -ENOMEM;
888 goto err_create_fnic_ioreq_slab;
889 }
890
891 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
892 if (!fnic_event_queue) {
893 printk(KERN_ERR PFX "fnic work queue create failed\n");
894 err = -ENOMEM;
895 goto err_create_fnic_workq;
896 }
897
898 spin_lock_init(&fnic_list_lock);
899 INIT_LIST_HEAD(&fnic_list);
900
901 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
902 if (!fnic_fc_transport) {
903 printk(KERN_ERR PFX "fc_attach_transport error\n");
904 err = -ENOMEM;
905 goto err_fc_transport;
906 }
907
908 /* register the driver with PCI system */
909 err = pci_register_driver(&fnic_driver);
910 if (err < 0) {
911 printk(KERN_ERR PFX "pci register error\n");
912 goto err_pci_register;
913 }
914 return err;
915
916err_pci_register:
917 fc_release_transport(fnic_fc_transport);
918err_fc_transport:
919 destroy_workqueue(fnic_event_queue);
920err_create_fnic_workq:
921 kmem_cache_destroy(fnic_io_req_cache);
922err_create_fnic_ioreq_slab:
923 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
924err_create_fnic_sgl_slab_max:
925 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
926err_create_fnic_sgl_slab_dflt:
927 return err;
928}
929
930static void __exit fnic_cleanup_module(void)
931{
932 pci_unregister_driver(&fnic_driver);
933 destroy_workqueue(fnic_event_queue);
934 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
935 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
936 kmem_cache_destroy(fnic_io_req_cache);
937 fc_release_transport(fnic_fc_transport);
938}
939
940module_init(fnic_init_module);
941module_exit(fnic_cleanup_module);
942
diff --git a/drivers/scsi/fnic/fnic_res.c b/drivers/scsi/fnic/fnic_res.c
new file mode 100644
index 000000000000..7ba61ec715d2
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_res.c
@@ -0,0 +1,444 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#include <linux/errno.h>
19#include <linux/types.h>
20#include <linux/pci.h>
21#include "wq_enet_desc.h"
22#include "rq_enet_desc.h"
23#include "cq_enet_desc.h"
24#include "vnic_resource.h"
25#include "vnic_dev.h"
26#include "vnic_wq.h"
27#include "vnic_rq.h"
28#include "vnic_cq.h"
29#include "vnic_intr.h"
30#include "vnic_stats.h"
31#include "vnic_nic.h"
32#include "fnic.h"
33
34int fnic_get_vnic_config(struct fnic *fnic)
35{
36 struct vnic_fc_config *c = &fnic->config;
37 int err;
38
39#define GET_CONFIG(m) \
40 do { \
41 err = vnic_dev_spec(fnic->vdev, \
42 offsetof(struct vnic_fc_config, m), \
43 sizeof(c->m), &c->m); \
44 if (err) { \
45 shost_printk(KERN_ERR, fnic->lport->host, \
46 "Error getting %s, %d\n", #m, \
47 err); \
48 return err; \
49 } \
50 } while (0);
51
52 GET_CONFIG(node_wwn);
53 GET_CONFIG(port_wwn);
54 GET_CONFIG(wq_enet_desc_count);
55 GET_CONFIG(wq_copy_desc_count);
56 GET_CONFIG(rq_desc_count);
57 GET_CONFIG(maxdatafieldsize);
58 GET_CONFIG(ed_tov);
59 GET_CONFIG(ra_tov);
60 GET_CONFIG(intr_timer);
61 GET_CONFIG(intr_timer_type);
62 GET_CONFIG(flags);
63 GET_CONFIG(flogi_retries);
64 GET_CONFIG(flogi_timeout);
65 GET_CONFIG(plogi_retries);
66 GET_CONFIG(plogi_timeout);
67 GET_CONFIG(io_throttle_count);
68 GET_CONFIG(link_down_timeout);
69 GET_CONFIG(port_down_timeout);
70 GET_CONFIG(port_down_io_retries);
71 GET_CONFIG(luns_per_tgt);
72
73 c->wq_enet_desc_count =
74 min_t(u32, VNIC_FNIC_WQ_DESCS_MAX,
75 max_t(u32, VNIC_FNIC_WQ_DESCS_MIN,
76 c->wq_enet_desc_count));
77 c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
78
79 c->wq_copy_desc_count =
80 min_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MAX,
81 max_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MIN,
82 c->wq_copy_desc_count));
83 c->wq_copy_desc_count = ALIGN(c->wq_copy_desc_count, 16);
84
85 c->rq_desc_count =
86 min_t(u32, VNIC_FNIC_RQ_DESCS_MAX,
87 max_t(u32, VNIC_FNIC_RQ_DESCS_MIN,
88 c->rq_desc_count));
89 c->rq_desc_count = ALIGN(c->rq_desc_count, 16);
90
91 c->maxdatafieldsize =
92 min_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MAX,
93 max_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MIN,
94 c->maxdatafieldsize));
95 c->ed_tov =
96 min_t(u32, VNIC_FNIC_EDTOV_MAX,
97 max_t(u32, VNIC_FNIC_EDTOV_MIN,
98 c->ed_tov));
99
100 c->ra_tov =
101 min_t(u32, VNIC_FNIC_RATOV_MAX,
102 max_t(u32, VNIC_FNIC_RATOV_MIN,
103 c->ra_tov));
104
105 c->flogi_retries =
106 min_t(u32, VNIC_FNIC_FLOGI_RETRIES_MAX, c->flogi_retries);
107
108 c->flogi_timeout =
109 min_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MAX,
110 max_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MIN,
111 c->flogi_timeout));
112
113 c->plogi_retries =
114 min_t(u32, VNIC_FNIC_PLOGI_RETRIES_MAX, c->plogi_retries);
115
116 c->plogi_timeout =
117 min_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MAX,
118 max_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MIN,
119 c->plogi_timeout));
120
121 c->io_throttle_count =
122 min_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MAX,
123 max_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MIN,
124 c->io_throttle_count));
125
126 c->link_down_timeout =
127 min_t(u32, VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX,
128 c->link_down_timeout);
129
130 c->port_down_timeout =
131 min_t(u32, VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX,
132 c->port_down_timeout);
133
134 c->port_down_io_retries =
135 min_t(u32, VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX,
136 c->port_down_io_retries);
137
138 c->luns_per_tgt =
139 min_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MAX,
140 max_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MIN,
141 c->luns_per_tgt));
142
143 c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
144 c->intr_timer_type = c->intr_timer_type;
145
146 shost_printk(KERN_INFO, fnic->lport->host,
147 "vNIC MAC addr %02x:%02x:%02x:%02x:%02x:%02x "
148 "wq/wq_copy/rq %d/%d/%d\n",
149 fnic->mac_addr[0], fnic->mac_addr[1], fnic->mac_addr[2],
150 fnic->mac_addr[3], fnic->mac_addr[4], fnic->mac_addr[5],
151 c->wq_enet_desc_count, c->wq_copy_desc_count,
152 c->rq_desc_count);
153 shost_printk(KERN_INFO, fnic->lport->host,
154 "vNIC node wwn %llx port wwn %llx\n",
155 c->node_wwn, c->port_wwn);
156 shost_printk(KERN_INFO, fnic->lport->host,
157 "vNIC ed_tov %d ra_tov %d\n",
158 c->ed_tov, c->ra_tov);
159 shost_printk(KERN_INFO, fnic->lport->host,
160 "vNIC mtu %d intr timer %d\n",
161 c->maxdatafieldsize, c->intr_timer);
162 shost_printk(KERN_INFO, fnic->lport->host,
163 "vNIC flags 0x%x luns per tgt %d\n",
164 c->flags, c->luns_per_tgt);
165 shost_printk(KERN_INFO, fnic->lport->host,
166 "vNIC flogi_retries %d flogi timeout %d\n",
167 c->flogi_retries, c->flogi_timeout);
168 shost_printk(KERN_INFO, fnic->lport->host,
169 "vNIC plogi retries %d plogi timeout %d\n",
170 c->plogi_retries, c->plogi_timeout);
171 shost_printk(KERN_INFO, fnic->lport->host,
172 "vNIC io throttle count %d link dn timeout %d\n",
173 c->io_throttle_count, c->link_down_timeout);
174 shost_printk(KERN_INFO, fnic->lport->host,
175 "vNIC port dn io retries %d port dn timeout %d\n",
176 c->port_down_io_retries, c->port_down_timeout);
177
178 return 0;
179}
180
181int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
182 u8 rss_hash_type,
183 u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable,
184 u8 tso_ipid_split_en, u8 ig_vlan_strip_en)
185{
186 u64 a0, a1;
187 u32 nic_cfg;
188 int wait = 1000;
189
190 vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
191 rss_hash_type, rss_hash_bits, rss_base_cpu,
192 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
193
194 a0 = nic_cfg;
195 a1 = 0;
196
197 return vnic_dev_cmd(fnic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
198}
199
200void fnic_get_res_counts(struct fnic *fnic)
201{
202 fnic->wq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_WQ);
203 fnic->raw_wq_count = fnic->wq_count - 1;
204 fnic->wq_copy_count = fnic->wq_count - fnic->raw_wq_count;
205 fnic->rq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_RQ);
206 fnic->cq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_CQ);
207 fnic->intr_count = vnic_dev_get_res_count(fnic->vdev,
208 RES_TYPE_INTR_CTRL);
209}
210
211void fnic_free_vnic_resources(struct fnic *fnic)
212{
213 unsigned int i;
214
215 for (i = 0; i < fnic->raw_wq_count; i++)
216 vnic_wq_free(&fnic->wq[i]);
217
218 for (i = 0; i < fnic->wq_copy_count; i++)
219 vnic_wq_copy_free(&fnic->wq_copy[i]);
220
221 for (i = 0; i < fnic->rq_count; i++)
222 vnic_rq_free(&fnic->rq[i]);
223
224 for (i = 0; i < fnic->cq_count; i++)
225 vnic_cq_free(&fnic->cq[i]);
226
227 for (i = 0; i < fnic->intr_count; i++)
228 vnic_intr_free(&fnic->intr[i]);
229}
230
231int fnic_alloc_vnic_resources(struct fnic *fnic)
232{
233 enum vnic_dev_intr_mode intr_mode;
234 unsigned int mask_on_assertion;
235 unsigned int interrupt_offset;
236 unsigned int error_interrupt_enable;
237 unsigned int error_interrupt_offset;
238 unsigned int i, cq_index;
239 unsigned int wq_copy_cq_desc_count;
240 int err;
241
242 intr_mode = vnic_dev_get_intr_mode(fnic->vdev);
243
244 shost_printk(KERN_INFO, fnic->lport->host, "vNIC interrupt mode: %s\n",
245 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
246 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
247 intr_mode == VNIC_DEV_INTR_MODE_MSIX ?
248 "MSI-X" : "unknown");
249
250 shost_printk(KERN_INFO, fnic->lport->host, "vNIC resources avail: "
251 "wq %d cp_wq %d raw_wq %d rq %d cq %d intr %d\n",
252 fnic->wq_count, fnic->wq_copy_count, fnic->raw_wq_count,
253 fnic->rq_count, fnic->cq_count, fnic->intr_count);
254
255 /* Allocate Raw WQ used for FCS frames */
256 for (i = 0; i < fnic->raw_wq_count; i++) {
257 err = vnic_wq_alloc(fnic->vdev, &fnic->wq[i], i,
258 fnic->config.wq_enet_desc_count,
259 sizeof(struct wq_enet_desc));
260 if (err)
261 goto err_out_cleanup;
262 }
263
264 /* Allocate Copy WQs used for SCSI IOs */
265 for (i = 0; i < fnic->wq_copy_count; i++) {
266 err = vnic_wq_copy_alloc(fnic->vdev, &fnic->wq_copy[i],
267 (fnic->raw_wq_count + i),
268 fnic->config.wq_copy_desc_count,
269 sizeof(struct fcpio_host_req));
270 if (err)
271 goto err_out_cleanup;
272 }
273
274 /* RQ for receiving FCS frames */
275 for (i = 0; i < fnic->rq_count; i++) {
276 err = vnic_rq_alloc(fnic->vdev, &fnic->rq[i], i,
277 fnic->config.rq_desc_count,
278 sizeof(struct rq_enet_desc));
279 if (err)
280 goto err_out_cleanup;
281 }
282
283 /* CQ for each RQ */
284 for (i = 0; i < fnic->rq_count; i++) {
285 cq_index = i;
286 err = vnic_cq_alloc(fnic->vdev,
287 &fnic->cq[cq_index], cq_index,
288 fnic->config.rq_desc_count,
289 sizeof(struct cq_enet_rq_desc));
290 if (err)
291 goto err_out_cleanup;
292 }
293
294 /* CQ for each WQ */
295 for (i = 0; i < fnic->raw_wq_count; i++) {
296 cq_index = fnic->rq_count + i;
297 err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index], cq_index,
298 fnic->config.wq_enet_desc_count,
299 sizeof(struct cq_enet_wq_desc));
300 if (err)
301 goto err_out_cleanup;
302 }
303
304 /* CQ for each COPY WQ */
305 wq_copy_cq_desc_count = (fnic->config.wq_copy_desc_count * 3);
306 for (i = 0; i < fnic->wq_copy_count; i++) {
307 cq_index = fnic->raw_wq_count + fnic->rq_count + i;
308 err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index],
309 cq_index,
310 wq_copy_cq_desc_count,
311 sizeof(struct fcpio_fw_req));
312 if (err)
313 goto err_out_cleanup;
314 }
315
316 for (i = 0; i < fnic->intr_count; i++) {
317 err = vnic_intr_alloc(fnic->vdev, &fnic->intr[i], i);
318 if (err)
319 goto err_out_cleanup;
320 }
321
322 fnic->legacy_pba = vnic_dev_get_res(fnic->vdev,
323 RES_TYPE_INTR_PBA_LEGACY, 0);
324
325 if (!fnic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
326 shost_printk(KERN_ERR, fnic->lport->host,
327 "Failed to hook legacy pba resource\n");
328 err = -ENODEV;
329 goto err_out_cleanup;
330 }
331
332 /*
333 * Init RQ/WQ resources.
334 *
335 * RQ[0 to n-1] point to CQ[0 to n-1]
336 * WQ[0 to m-1] point to CQ[n to n+m-1]
337 * WQ_COPY[0 to k-1] points to CQ[n+m to n+m+k-1]
338 *
339 * Note for copy wq we always initialize with cq_index = 0
340 *
341 * Error interrupt is not enabled for MSI.
342 */
343
344 switch (intr_mode) {
345 case VNIC_DEV_INTR_MODE_INTX:
346 case VNIC_DEV_INTR_MODE_MSIX:
347 error_interrupt_enable = 1;
348 error_interrupt_offset = fnic->err_intr_offset;
349 break;
350 default:
351 error_interrupt_enable = 0;
352 error_interrupt_offset = 0;
353 break;
354 }
355
356 for (i = 0; i < fnic->rq_count; i++) {
357 cq_index = i;
358 vnic_rq_init(&fnic->rq[i],
359 cq_index,
360 error_interrupt_enable,
361 error_interrupt_offset);
362 }
363
364 for (i = 0; i < fnic->raw_wq_count; i++) {
365 cq_index = i + fnic->rq_count;
366 vnic_wq_init(&fnic->wq[i],
367 cq_index,
368 error_interrupt_enable,
369 error_interrupt_offset);
370 }
371
372 for (i = 0; i < fnic->wq_copy_count; i++) {
373 vnic_wq_copy_init(&fnic->wq_copy[i],
374 0 /* cq_index 0 - always */,
375 error_interrupt_enable,
376 error_interrupt_offset);
377 }
378
379 for (i = 0; i < fnic->cq_count; i++) {
380
381 switch (intr_mode) {
382 case VNIC_DEV_INTR_MODE_MSIX:
383 interrupt_offset = i;
384 break;
385 default:
386 interrupt_offset = 0;
387 break;
388 }
389
390 vnic_cq_init(&fnic->cq[i],
391 0 /* flow_control_enable */,
392 1 /* color_enable */,
393 0 /* cq_head */,
394 0 /* cq_tail */,
395 1 /* cq_tail_color */,
396 1 /* interrupt_enable */,
397 1 /* cq_entry_enable */,
398 0 /* cq_message_enable */,
399 interrupt_offset,
400 0 /* cq_message_addr */);
401 }
402
403 /*
404 * Init INTR resources
405 *
406 * mask_on_assertion is not used for INTx due to the level-
407 * triggered nature of INTx
408 */
409
410 switch (intr_mode) {
411 case VNIC_DEV_INTR_MODE_MSI:
412 case VNIC_DEV_INTR_MODE_MSIX:
413 mask_on_assertion = 1;
414 break;
415 default:
416 mask_on_assertion = 0;
417 break;
418 }
419
420 for (i = 0; i < fnic->intr_count; i++) {
421 vnic_intr_init(&fnic->intr[i],
422 fnic->config.intr_timer,
423 fnic->config.intr_timer_type,
424 mask_on_assertion);
425 }
426
427 /* init the stats memory by making the first call here */
428 err = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
429 if (err) {
430 shost_printk(KERN_ERR, fnic->lport->host,
431 "vnic_dev_stats_dump failed - x%x\n", err);
432 goto err_out_cleanup;
433 }
434
435 /* Clear LIF stats */
436 vnic_dev_stats_clear(fnic->vdev);
437
438 return 0;
439
440err_out_cleanup:
441 fnic_free_vnic_resources(fnic);
442
443 return err;
444}
diff --git a/drivers/scsi/fnic/fnic_res.h b/drivers/scsi/fnic/fnic_res.h
new file mode 100644
index 000000000000..b6f310262534
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_res.h
@@ -0,0 +1,197 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _FNIC_RES_H_
19#define _FNIC_RES_H_
20
21#include "wq_enet_desc.h"
22#include "rq_enet_desc.h"
23#include "vnic_wq.h"
24#include "vnic_rq.h"
25#include "fnic_io.h"
26#include "fcpio.h"
27#include "vnic_wq_copy.h"
28#include "vnic_cq_copy.h"
29
30static inline void fnic_queue_wq_desc(struct vnic_wq *wq,
31 void *os_buf, dma_addr_t dma_addr,
32 unsigned int len, unsigned int fc_eof,
33 int vlan_tag_insert,
34 unsigned int vlan_tag,
35 int cq_entry, int sop, int eop)
36{
37 struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
38
39 wq_enet_desc_enc(desc,
40 (u64)dma_addr | VNIC_PADDR_TARGET,
41 (u16)len,
42 0, /* mss_or_csum_offset */
43 (u16)fc_eof,
44 0, /* offload_mode */
45 (u8)eop, (u8)cq_entry,
46 1, /* fcoe_encap */
47 (u8)vlan_tag_insert,
48 (u16)vlan_tag,
49 0 /* loopback */);
50
51 vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop);
52}
53
54static inline void fnic_queue_wq_copy_desc_icmnd_16(struct vnic_wq_copy *wq,
55 u32 req_id,
56 u32 lunmap_id, u8 spl_flags,
57 u32 sgl_cnt, u32 sense_len,
58 u64 sgl_addr, u64 sns_addr,
59 u8 crn, u8 pri_ta,
60 u8 flags, u8 *scsi_cdb,
61 u32 data_len, u8 *lun,
62 u32 d_id, u16 mss,
63 u32 ratov, u32 edtov)
64{
65 struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
66
67 desc->hdr.type = FCPIO_ICMND_16; /* enum fcpio_type */
68 desc->hdr.status = 0; /* header status entry */
69 desc->hdr._resvd = 0; /* reserved */
70 desc->hdr.tag.u.req_id = req_id; /* id for this request */
71
72 desc->u.icmnd_16.lunmap_id = lunmap_id; /* index into lunmap table */
73 desc->u.icmnd_16.special_req_flags = spl_flags; /* exch req flags */
74 desc->u.icmnd_16._resvd0[0] = 0; /* reserved */
75 desc->u.icmnd_16._resvd0[1] = 0; /* reserved */
76 desc->u.icmnd_16._resvd0[2] = 0; /* reserved */
77 desc->u.icmnd_16.sgl_cnt = sgl_cnt; /* scatter-gather list count */
78 desc->u.icmnd_16.sense_len = sense_len; /* sense buffer length */
79 desc->u.icmnd_16.sgl_addr = sgl_addr; /* scatter-gather list addr */
80 desc->u.icmnd_16.sense_addr = sns_addr; /* sense buffer address */
81 desc->u.icmnd_16.crn = crn; /* SCSI Command Reference No.*/
82 desc->u.icmnd_16.pri_ta = pri_ta; /* SCSI Pri & Task attribute */
83 desc->u.icmnd_16._resvd1 = 0; /* reserved: should be 0 */
84 desc->u.icmnd_16.flags = flags; /* command flags */
85 memcpy(desc->u.icmnd_16.scsi_cdb, scsi_cdb, CDB_16); /* SCSI CDB */
86 desc->u.icmnd_16.data_len = data_len; /* length of data expected */
87 memcpy(desc->u.icmnd_16.lun, lun, LUN_ADDRESS); /* LUN address */
88 desc->u.icmnd_16._resvd2 = 0; /* reserved */
89 hton24(desc->u.icmnd_16.d_id, d_id); /* FC vNIC only: Target D_ID */
90 desc->u.icmnd_16.mss = mss; /* FC vNIC only: max burst */
91 desc->u.icmnd_16.r_a_tov = ratov; /*FC vNIC only: Res. Alloc Timeout */
92 desc->u.icmnd_16.e_d_tov = edtov; /*FC vNIC only: Err Detect Timeout */
93
94 vnic_wq_copy_post(wq);
95}
96
97static inline void fnic_queue_wq_copy_desc_itmf(struct vnic_wq_copy *wq,
98 u32 req_id, u32 lunmap_id,
99 u32 tm_req, u32 tm_id, u8 *lun,
100 u32 d_id, u32 r_a_tov,
101 u32 e_d_tov)
102{
103 struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
104
105 desc->hdr.type = FCPIO_ITMF; /* enum fcpio_type */
106 desc->hdr.status = 0; /* header status entry */
107 desc->hdr._resvd = 0; /* reserved */
108 desc->hdr.tag.u.req_id = req_id; /* id for this request */
109
110 desc->u.itmf.lunmap_id = lunmap_id; /* index into lunmap table */
111 desc->u.itmf.tm_req = tm_req; /* SCSI Task Management request */
112 desc->u.itmf.t_tag = tm_id; /* tag of fcpio to be aborted */
113 desc->u.itmf._resvd = 0;
114 memcpy(desc->u.itmf.lun, lun, LUN_ADDRESS); /* LUN address */
115 desc->u.itmf._resvd1 = 0;
116 hton24(desc->u.itmf.d_id, d_id); /* FC vNIC only: Target D_ID */
117 desc->u.itmf.r_a_tov = r_a_tov; /* FC vNIC only: R_A_TOV in msec */
118 desc->u.itmf.e_d_tov = e_d_tov; /* FC vNIC only: E_D_TOV in msec */
119
120 vnic_wq_copy_post(wq);
121}
122
123static inline void fnic_queue_wq_copy_desc_flogi_reg(struct vnic_wq_copy *wq,
124 u32 req_id, u8 format,
125 u32 s_id, u8 *gw_mac)
126{
127 struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
128
129 desc->hdr.type = FCPIO_FLOGI_REG; /* enum fcpio_type */
130 desc->hdr.status = 0; /* header status entry */
131 desc->hdr._resvd = 0; /* reserved */
132 desc->hdr.tag.u.req_id = req_id; /* id for this request */
133
134 desc->u.flogi_reg.format = format;
135 hton24(desc->u.flogi_reg.s_id, s_id);
136 memcpy(desc->u.flogi_reg.gateway_mac, gw_mac, ETH_ALEN);
137
138 vnic_wq_copy_post(wq);
139}
140
141static inline void fnic_queue_wq_copy_desc_fw_reset(struct vnic_wq_copy *wq,
142 u32 req_id)
143{
144 struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
145
146 desc->hdr.type = FCPIO_RESET; /* enum fcpio_type */
147 desc->hdr.status = 0; /* header status entry */
148 desc->hdr._resvd = 0; /* reserved */
149 desc->hdr.tag.u.req_id = req_id; /* id for this request */
150
151 vnic_wq_copy_post(wq);
152}
153
154static inline void fnic_queue_wq_copy_desc_lunmap(struct vnic_wq_copy *wq,
155 u32 req_id, u64 lunmap_addr,
156 u32 lunmap_len)
157{
158 struct fcpio_host_req *desc = vnic_wq_copy_next_desc(wq);
159
160 desc->hdr.type = FCPIO_LUNMAP_REQ; /* enum fcpio_type */
161 desc->hdr.status = 0; /* header status entry */
162 desc->hdr._resvd = 0; /* reserved */
163 desc->hdr.tag.u.req_id = req_id; /* id for this request */
164
165 desc->u.lunmap_req.addr = lunmap_addr; /* address of the buffer */
166 desc->u.lunmap_req.len = lunmap_len; /* len of the buffer */
167
168 vnic_wq_copy_post(wq);
169}
170
171static inline void fnic_queue_rq_desc(struct vnic_rq *rq,
172 void *os_buf, dma_addr_t dma_addr,
173 u16 len)
174{
175 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
176
177 rq_enet_desc_enc(desc,
178 (u64)dma_addr | VNIC_PADDR_TARGET,
179 RQ_ENET_TYPE_ONLY_SOP,
180 (u16)len);
181
182 vnic_rq_post(rq, os_buf, 0, dma_addr, len);
183}
184
185
186struct fnic;
187
188int fnic_get_vnic_config(struct fnic *);
189int fnic_alloc_vnic_resources(struct fnic *);
190void fnic_free_vnic_resources(struct fnic *);
191void fnic_get_res_counts(struct fnic *);
192int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
193 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu,
194 u8 rss_enable, u8 tso_ipid_split_en,
195 u8 ig_vlan_strip_en);
196
197#endif /* _FNIC_RES_H_ */
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
new file mode 100644
index 000000000000..eabf36502856
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -0,0 +1,1850 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#include <linux/mempool.h>
19#include <linux/errno.h>
20#include <linux/init.h>
21#include <linux/workqueue.h>
22#include <linux/pci.h>
23#include <linux/scatterlist.h>
24#include <linux/skbuff.h>
25#include <linux/spinlock.h>
26#include <linux/if_ether.h>
27#include <linux/if_vlan.h>
28#include <linux/delay.h>
29#include <scsi/scsi.h>
30#include <scsi/scsi_host.h>
31#include <scsi/scsi_device.h>
32#include <scsi/scsi_cmnd.h>
33#include <scsi/scsi_tcq.h>
34#include <scsi/fc/fc_els.h>
35#include <scsi/fc/fc_fcoe.h>
36#include <scsi/libfc.h>
37#include <scsi/fc_frame.h>
38#include "fnic_io.h"
39#include "fnic.h"
40
41const char *fnic_state_str[] = {
42 [FNIC_IN_FC_MODE] = "FNIC_IN_FC_MODE",
43 [FNIC_IN_FC_TRANS_ETH_MODE] = "FNIC_IN_FC_TRANS_ETH_MODE",
44 [FNIC_IN_ETH_MODE] = "FNIC_IN_ETH_MODE",
45 [FNIC_IN_ETH_TRANS_FC_MODE] = "FNIC_IN_ETH_TRANS_FC_MODE",
46};
47
48static const char *fnic_ioreq_state_str[] = {
49 [FNIC_IOREQ_CMD_PENDING] = "FNIC_IOREQ_CMD_PENDING",
50 [FNIC_IOREQ_ABTS_PENDING] = "FNIC_IOREQ_ABTS_PENDING",
51 [FNIC_IOREQ_ABTS_COMPLETE] = "FNIC_IOREQ_ABTS_COMPLETE",
52 [FNIC_IOREQ_CMD_COMPLETE] = "FNIC_IOREQ_CMD_COMPLETE",
53};
54
55static const char *fcpio_status_str[] = {
56 [FCPIO_SUCCESS] = "FCPIO_SUCCESS", /*0x0*/
57 [FCPIO_INVALID_HEADER] = "FCPIO_INVALID_HEADER",
58 [FCPIO_OUT_OF_RESOURCE] = "FCPIO_OUT_OF_RESOURCE",
59 [FCPIO_INVALID_PARAM] = "FCPIO_INVALID_PARAM]",
60 [FCPIO_REQ_NOT_SUPPORTED] = "FCPIO_REQ_NOT_SUPPORTED",
61 [FCPIO_IO_NOT_FOUND] = "FCPIO_IO_NOT_FOUND",
62 [FCPIO_ABORTED] = "FCPIO_ABORTED", /*0x41*/
63 [FCPIO_TIMEOUT] = "FCPIO_TIMEOUT",
64 [FCPIO_SGL_INVALID] = "FCPIO_SGL_INVALID",
65 [FCPIO_MSS_INVALID] = "FCPIO_MSS_INVALID",
66 [FCPIO_DATA_CNT_MISMATCH] = "FCPIO_DATA_CNT_MISMATCH",
67 [FCPIO_FW_ERR] = "FCPIO_FW_ERR",
68 [FCPIO_ITMF_REJECTED] = "FCPIO_ITMF_REJECTED",
69 [FCPIO_ITMF_FAILED] = "FCPIO_ITMF_FAILED",
70 [FCPIO_ITMF_INCORRECT_LUN] = "FCPIO_ITMF_INCORRECT_LUN",
71 [FCPIO_CMND_REJECTED] = "FCPIO_CMND_REJECTED",
72 [FCPIO_NO_PATH_AVAIL] = "FCPIO_NO_PATH_AVAIL",
73 [FCPIO_PATH_FAILED] = "FCPIO_PATH_FAILED",
74 [FCPIO_LUNMAP_CHNG_PEND] = "FCPIO_LUNHMAP_CHNG_PEND",
75};
76
77const char *fnic_state_to_str(unsigned int state)
78{
79 if (state >= ARRAY_SIZE(fnic_state_str) || !fnic_state_str[state])
80 return "unknown";
81
82 return fnic_state_str[state];
83}
84
85static const char *fnic_ioreq_state_to_str(unsigned int state)
86{
87 if (state >= ARRAY_SIZE(fnic_ioreq_state_str) ||
88 !fnic_ioreq_state_str[state])
89 return "unknown";
90
91 return fnic_ioreq_state_str[state];
92}
93
94static const char *fnic_fcpio_status_to_str(unsigned int status)
95{
96 if (status >= ARRAY_SIZE(fcpio_status_str) || !fcpio_status_str[status])
97 return "unknown";
98
99 return fcpio_status_str[status];
100}
101
102static void fnic_cleanup_io(struct fnic *fnic, int exclude_id);
103
104static inline spinlock_t *fnic_io_lock_hash(struct fnic *fnic,
105 struct scsi_cmnd *sc)
106{
107 u32 hash = sc->request->tag & (FNIC_IO_LOCKS - 1);
108
109 return &fnic->io_req_lock[hash];
110}
111
112/*
113 * Unmap the data buffer and sense buffer for an io_req,
114 * also unmap and free the device-private scatter/gather list.
115 */
116static void fnic_release_ioreq_buf(struct fnic *fnic,
117 struct fnic_io_req *io_req,
118 struct scsi_cmnd *sc)
119{
120 if (io_req->sgl_list_pa)
121 pci_unmap_single(fnic->pdev, io_req->sgl_list_pa,
122 sizeof(io_req->sgl_list[0]) * io_req->sgl_cnt,
123 PCI_DMA_TODEVICE);
124 scsi_dma_unmap(sc);
125
126 if (io_req->sgl_cnt)
127 mempool_free(io_req->sgl_list_alloc,
128 fnic->io_sgl_pool[io_req->sgl_type]);
129 if (io_req->sense_buf_pa)
130 pci_unmap_single(fnic->pdev, io_req->sense_buf_pa,
131 SCSI_SENSE_BUFFERSIZE, PCI_DMA_FROMDEVICE);
132}
133
134/* Free up Copy Wq descriptors. Called with copy_wq lock held */
135static int free_wq_copy_descs(struct fnic *fnic, struct vnic_wq_copy *wq)
136{
137 /* if no Ack received from firmware, then nothing to clean */
138 if (!fnic->fw_ack_recd[0])
139 return 1;
140
141 /*
142 * Update desc_available count based on number of freed descriptors
143 * Account for wraparound
144 */
145 if (wq->to_clean_index <= fnic->fw_ack_index[0])
146 wq->ring.desc_avail += (fnic->fw_ack_index[0]
147 - wq->to_clean_index + 1);
148 else
149 wq->ring.desc_avail += (wq->ring.desc_count
150 - wq->to_clean_index
151 + fnic->fw_ack_index[0] + 1);
152
153 /*
154 * just bump clean index to ack_index+1 accounting for wraparound
155 * this will essentially free up all descriptors between
156 * to_clean_index and fw_ack_index, both inclusive
157 */
158 wq->to_clean_index =
159 (fnic->fw_ack_index[0] + 1) % wq->ring.desc_count;
160
161 /* we have processed the acks received so far */
162 fnic->fw_ack_recd[0] = 0;
163 return 0;
164}
165
166
167/*
168 * fnic_fw_reset_handler
169 * Routine to send reset msg to fw
170 */
171int fnic_fw_reset_handler(struct fnic *fnic)
172{
173 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
174 int ret = 0;
175 unsigned long flags;
176
177 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
178
179 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
180 free_wq_copy_descs(fnic, wq);
181
182 if (!vnic_wq_copy_desc_avail(wq))
183 ret = -EAGAIN;
184 else
185 fnic_queue_wq_copy_desc_fw_reset(wq, SCSI_NO_TAG);
186
187 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
188
189 if (!ret)
190 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
191 "Issued fw reset\n");
192 else
193 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
194 "Failed to issue fw reset\n");
195 return ret;
196}
197
198
199/*
200 * fnic_flogi_reg_handler
201 * Routine to send flogi register msg to fw
202 */
203int fnic_flogi_reg_handler(struct fnic *fnic)
204{
205 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
206 u8 gw_mac[ETH_ALEN];
207 int ret = 0;
208 unsigned long flags;
209
210 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
211
212 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
213 free_wq_copy_descs(fnic, wq);
214
215 if (!vnic_wq_copy_desc_avail(wq)) {
216 ret = -EAGAIN;
217 goto flogi_reg_ioreq_end;
218 }
219
220 if (fnic->fcoui_mode)
221 memset(gw_mac, 0xff, ETH_ALEN);
222 else
223 memcpy(gw_mac, fnic->dest_addr, ETH_ALEN);
224
225 fnic_queue_wq_copy_desc_flogi_reg(wq, SCSI_NO_TAG,
226 FCPIO_FLOGI_REG_GW_DEST,
227 fnic->s_id,
228 gw_mac);
229
230flogi_reg_ioreq_end:
231 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
232
233 if (!ret)
234 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
235 "flog reg issued\n");
236
237 return ret;
238}
239
240/*
241 * fnic_queue_wq_copy_desc
242 * Routine to enqueue a wq copy desc
243 */
244static inline int fnic_queue_wq_copy_desc(struct fnic *fnic,
245 struct vnic_wq_copy *wq,
246 struct fnic_io_req *io_req,
247 struct scsi_cmnd *sc,
248 u32 sg_count)
249{
250 struct scatterlist *sg;
251 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
252 struct fc_rport_libfc_priv *rp = rport->dd_data;
253 struct host_sg_desc *desc;
254 u8 pri_tag = 0;
255 unsigned int i;
256 unsigned long intr_flags;
257 int flags;
258 u8 exch_flags;
259 struct scsi_lun fc_lun;
260 char msg[2];
261
262 if (sg_count) {
263 BUG_ON(sg_count < 0);
264 BUG_ON(sg_count > FNIC_MAX_SG_DESC_CNT);
265
266 /* For each SGE, create a device desc entry */
267 desc = io_req->sgl_list;
268 for_each_sg(scsi_sglist(sc), sg, sg_count, i) {
269 desc->addr = cpu_to_le64(sg_dma_address(sg));
270 desc->len = cpu_to_le32(sg_dma_len(sg));
271 desc->_resvd = 0;
272 desc++;
273 }
274
275 io_req->sgl_list_pa = pci_map_single
276 (fnic->pdev,
277 io_req->sgl_list,
278 sizeof(io_req->sgl_list[0]) * sg_count,
279 PCI_DMA_TODEVICE);
280 }
281
282 io_req->sense_buf_pa = pci_map_single(fnic->pdev,
283 sc->sense_buffer,
284 SCSI_SENSE_BUFFERSIZE,
285 PCI_DMA_FROMDEVICE);
286
287 int_to_scsilun(sc->device->lun, &fc_lun);
288
289 pri_tag = FCPIO_ICMND_PTA_SIMPLE;
290 msg[0] = MSG_SIMPLE_TAG;
291 scsi_populate_tag_msg(sc, msg);
292 if (msg[0] == MSG_ORDERED_TAG)
293 pri_tag = FCPIO_ICMND_PTA_ORDERED;
294
295 /* Enqueue the descriptor in the Copy WQ */
296 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
297
298 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
299 free_wq_copy_descs(fnic, wq);
300
301 if (unlikely(!vnic_wq_copy_desc_avail(wq))) {
302 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
303 return SCSI_MLQUEUE_HOST_BUSY;
304 }
305
306 flags = 0;
307 if (sc->sc_data_direction == DMA_FROM_DEVICE)
308 flags = FCPIO_ICMND_RDDATA;
309 else if (sc->sc_data_direction == DMA_TO_DEVICE)
310 flags = FCPIO_ICMND_WRDATA;
311
312 exch_flags = 0;
313 if ((fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) &&
314 (rp->flags & FC_RP_FLAGS_RETRY))
315 exch_flags |= FCPIO_ICMND_SRFLAG_RETRY;
316
317 fnic_queue_wq_copy_desc_icmnd_16(wq, sc->request->tag,
318 0, exch_flags, io_req->sgl_cnt,
319 SCSI_SENSE_BUFFERSIZE,
320 io_req->sgl_list_pa,
321 io_req->sense_buf_pa,
322 0, /* scsi cmd ref, always 0 */
323 pri_tag, /* scsi pri and tag */
324 flags, /* command flags */
325 sc->cmnd, scsi_bufflen(sc),
326 fc_lun.scsi_lun, io_req->port_id,
327 rport->maxframe_size, rp->r_a_tov,
328 rp->e_d_tov);
329
330 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
331 return 0;
332}
333
334/*
335 * fnic_queuecommand
336 * Routine to send a scsi cdb
337 * Called with host_lock held and interrupts disabled.
338 */
339int fnic_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
340{
341 struct fc_lport *lp;
342 struct fc_rport *rport;
343 struct fnic_io_req *io_req;
344 struct fnic *fnic;
345 struct vnic_wq_copy *wq;
346 int ret;
347 u32 sg_count;
348 unsigned long flags;
349 unsigned long ptr;
350
351 rport = starget_to_rport(scsi_target(sc->device));
352 ret = fc_remote_port_chkready(rport);
353 if (ret) {
354 sc->result = ret;
355 done(sc);
356 return 0;
357 }
358
359 lp = shost_priv(sc->device->host);
360 if (lp->state != LPORT_ST_READY || !(lp->link_up))
361 return SCSI_MLQUEUE_HOST_BUSY;
362
363 /*
364 * Release host lock, use driver resource specific locks from here.
365 * Don't re-enable interrupts in case they were disabled prior to the
366 * caller disabling them.
367 */
368 spin_unlock(lp->host->host_lock);
369
370 /* Get a new io_req for this SCSI IO */
371 fnic = lport_priv(lp);
372
373 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
374 if (!io_req) {
375 ret = SCSI_MLQUEUE_HOST_BUSY;
376 goto out;
377 }
378 memset(io_req, 0, sizeof(*io_req));
379
380 /* Map the data buffer */
381 sg_count = scsi_dma_map(sc);
382 if (sg_count < 0) {
383 mempool_free(io_req, fnic->io_req_pool);
384 goto out;
385 }
386
387 /* Determine the type of scatter/gather list we need */
388 io_req->sgl_cnt = sg_count;
389 io_req->sgl_type = FNIC_SGL_CACHE_DFLT;
390 if (sg_count > FNIC_DFLT_SG_DESC_CNT)
391 io_req->sgl_type = FNIC_SGL_CACHE_MAX;
392
393 if (sg_count) {
394 io_req->sgl_list =
395 mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
396 GFP_ATOMIC | GFP_DMA);
397 if (!io_req->sgl_list) {
398 ret = SCSI_MLQUEUE_HOST_BUSY;
399 scsi_dma_unmap(sc);
400 mempool_free(io_req, fnic->io_req_pool);
401 goto out;
402 }
403
404 /* Cache sgl list allocated address before alignment */
405 io_req->sgl_list_alloc = io_req->sgl_list;
406 ptr = (unsigned long) io_req->sgl_list;
407 if (ptr % FNIC_SG_DESC_ALIGN) {
408 io_req->sgl_list = (struct host_sg_desc *)
409 (((unsigned long) ptr
410 + FNIC_SG_DESC_ALIGN - 1)
411 & ~(FNIC_SG_DESC_ALIGN - 1));
412 }
413 }
414
415 /* initialize rest of io_req */
416 io_req->port_id = rport->port_id;
417 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
418 CMD_SP(sc) = (char *)io_req;
419 sc->scsi_done = done;
420
421 /* create copy wq desc and enqueue it */
422 wq = &fnic->wq_copy[0];
423 ret = fnic_queue_wq_copy_desc(fnic, wq, io_req, sc, sg_count);
424 if (ret) {
425 /*
426 * In case another thread cancelled the request,
427 * refetch the pointer under the lock.
428 */
429 spinlock_t *io_lock = fnic_io_lock_hash(fnic, sc);
430
431 spin_lock_irqsave(io_lock, flags);
432 io_req = (struct fnic_io_req *)CMD_SP(sc);
433 CMD_SP(sc) = NULL;
434 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
435 spin_unlock_irqrestore(io_lock, flags);
436 if (io_req) {
437 fnic_release_ioreq_buf(fnic, io_req, sc);
438 mempool_free(io_req, fnic->io_req_pool);
439 }
440 }
441out:
442 /* acquire host lock before returning to SCSI */
443 spin_lock(lp->host->host_lock);
444 return ret;
445}
446
447/*
448 * fnic_fcpio_fw_reset_cmpl_handler
449 * Routine to handle fw reset completion
450 */
451static int fnic_fcpio_fw_reset_cmpl_handler(struct fnic *fnic,
452 struct fcpio_fw_req *desc)
453{
454 u8 type;
455 u8 hdr_status;
456 struct fcpio_tag tag;
457 int ret = 0;
458 struct fc_frame *flogi;
459 unsigned long flags;
460
461 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
462
463 /* Clean up all outstanding io requests */
464 fnic_cleanup_io(fnic, SCSI_NO_TAG);
465
466 spin_lock_irqsave(&fnic->fnic_lock, flags);
467
468 flogi = fnic->flogi;
469 fnic->flogi = NULL;
470
471 /* fnic should be in FC_TRANS_ETH_MODE */
472 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE) {
473 /* Check status of reset completion */
474 if (!hdr_status) {
475 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
476 "reset cmpl success\n");
477 /* Ready to send flogi out */
478 fnic->state = FNIC_IN_ETH_MODE;
479 } else {
480 FNIC_SCSI_DBG(KERN_DEBUG,
481 fnic->lport->host,
482 "fnic fw_reset : failed %s\n",
483 fnic_fcpio_status_to_str(hdr_status));
484
485 /*
486 * Unable to change to eth mode, cannot send out flogi
487 * Change state to fc mode, so that subsequent Flogi
488 * requests from libFC will cause more attempts to
489 * reset the firmware. Free the cached flogi
490 */
491 fnic->state = FNIC_IN_FC_MODE;
492 ret = -1;
493 }
494 } else {
495 FNIC_SCSI_DBG(KERN_DEBUG,
496 fnic->lport->host,
497 "Unexpected state %s while processing"
498 " reset cmpl\n", fnic_state_to_str(fnic->state));
499 ret = -1;
500 }
501
502 /* Thread removing device blocks till firmware reset is complete */
503 if (fnic->remove_wait)
504 complete(fnic->remove_wait);
505
506 /*
507 * If fnic is being removed, or fw reset failed
508 * free the flogi frame. Else, send it out
509 */
510 if (fnic->remove_wait || ret) {
511 fnic->flogi_oxid = FC_XID_UNKNOWN;
512 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
513 if (flogi)
514 dev_kfree_skb_irq(fp_skb(flogi));
515 goto reset_cmpl_handler_end;
516 }
517
518 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
519
520 if (flogi)
521 ret = fnic_send_frame(fnic, flogi);
522
523 reset_cmpl_handler_end:
524 return ret;
525}
526
527/*
528 * fnic_fcpio_flogi_reg_cmpl_handler
529 * Routine to handle flogi register completion
530 */
531static int fnic_fcpio_flogi_reg_cmpl_handler(struct fnic *fnic,
532 struct fcpio_fw_req *desc)
533{
534 u8 type;
535 u8 hdr_status;
536 struct fcpio_tag tag;
537 int ret = 0;
538 struct fc_frame *flogi_resp = NULL;
539 unsigned long flags;
540 struct sk_buff *skb;
541
542 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
543
544 /* Update fnic state based on status of flogi reg completion */
545 spin_lock_irqsave(&fnic->fnic_lock, flags);
546
547 flogi_resp = fnic->flogi_resp;
548 fnic->flogi_resp = NULL;
549
550 if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE) {
551
552 /* Check flogi registration completion status */
553 if (!hdr_status) {
554 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
555 "flog reg succeeded\n");
556 fnic->state = FNIC_IN_FC_MODE;
557 } else {
558 FNIC_SCSI_DBG(KERN_DEBUG,
559 fnic->lport->host,
560 "fnic flogi reg :failed %s\n",
561 fnic_fcpio_status_to_str(hdr_status));
562 fnic->state = FNIC_IN_ETH_MODE;
563 ret = -1;
564 }
565 } else {
566 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
567 "Unexpected fnic state %s while"
568 " processing flogi reg completion\n",
569 fnic_state_to_str(fnic->state));
570 ret = -1;
571 }
572
573 /* Successful flogi reg cmpl, pass frame to LibFC */
574 if (!ret && flogi_resp) {
575 if (fnic->stop_rx_link_events) {
576 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
577 goto reg_cmpl_handler_end;
578 }
579 skb = (struct sk_buff *)flogi_resp;
580 /* Use fr_flags to indicate whether flogi resp or not */
581 fr_flags(flogi_resp) = 1;
582 fr_dev(flogi_resp) = fnic->lport;
583 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
584
585 skb_queue_tail(&fnic->frame_queue, skb);
586 queue_work(fnic_event_queue, &fnic->frame_work);
587
588 } else {
589 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
590 if (flogi_resp)
591 dev_kfree_skb_irq(fp_skb(flogi_resp));
592 }
593
594reg_cmpl_handler_end:
595 return ret;
596}
597
598static inline int is_ack_index_in_range(struct vnic_wq_copy *wq,
599 u16 request_out)
600{
601 if (wq->to_clean_index <= wq->to_use_index) {
602 /* out of range, stale request_out index */
603 if (request_out < wq->to_clean_index ||
604 request_out >= wq->to_use_index)
605 return 0;
606 } else {
607 /* out of range, stale request_out index */
608 if (request_out < wq->to_clean_index &&
609 request_out >= wq->to_use_index)
610 return 0;
611 }
612 /* request_out index is in range */
613 return 1;
614}
615
616
617/*
618 * Mark that ack received and store the Ack index. If there are multiple
619 * acks received before Tx thread cleans it up, the latest value will be
620 * used which is correct behavior. This state should be in the copy Wq
621 * instead of in the fnic
622 */
623static inline void fnic_fcpio_ack_handler(struct fnic *fnic,
624 unsigned int cq_index,
625 struct fcpio_fw_req *desc)
626{
627 struct vnic_wq_copy *wq;
628 u16 request_out = desc->u.ack.request_out;
629 unsigned long flags;
630
631 /* mark the ack state */
632 wq = &fnic->wq_copy[cq_index - fnic->raw_wq_count - fnic->rq_count];
633 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
634
635 if (is_ack_index_in_range(wq, request_out)) {
636 fnic->fw_ack_index[0] = request_out;
637 fnic->fw_ack_recd[0] = 1;
638 }
639 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
640}
641
642/*
643 * fnic_fcpio_icmnd_cmpl_handler
644 * Routine to handle icmnd completions
645 */
646static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
647 struct fcpio_fw_req *desc)
648{
649 u8 type;
650 u8 hdr_status;
651 struct fcpio_tag tag;
652 u32 id;
653 u64 xfer_len = 0;
654 struct fcpio_icmnd_cmpl *icmnd_cmpl;
655 struct fnic_io_req *io_req;
656 struct scsi_cmnd *sc;
657 unsigned long flags;
658 spinlock_t *io_lock;
659
660 /* Decode the cmpl description to get the io_req id */
661 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
662 fcpio_tag_id_dec(&tag, &id);
663
664 if (id >= FNIC_MAX_IO_REQ)
665 return;
666
667 sc = scsi_host_find_tag(fnic->lport->host, id);
668 WARN_ON_ONCE(!sc);
669 if (!sc)
670 return;
671
672 io_lock = fnic_io_lock_hash(fnic, sc);
673 spin_lock_irqsave(io_lock, flags);
674 io_req = (struct fnic_io_req *)CMD_SP(sc);
675 WARN_ON_ONCE(!io_req);
676 if (!io_req) {
677 spin_unlock_irqrestore(io_lock, flags);
678 return;
679 }
680
681 /* firmware completed the io */
682 io_req->io_completed = 1;
683
684 /*
685 * if SCSI-ML has already issued abort on this command,
686 * ignore completion of the IO. The abts path will clean it up
687 */
688 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
689 spin_unlock_irqrestore(io_lock, flags);
690 return;
691 }
692
693 /* Mark the IO as complete */
694 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
695
696 icmnd_cmpl = &desc->u.icmnd_cmpl;
697
698 switch (hdr_status) {
699 case FCPIO_SUCCESS:
700 sc->result = (DID_OK << 16) | icmnd_cmpl->scsi_status;
701 xfer_len = scsi_bufflen(sc);
702 scsi_set_resid(sc, icmnd_cmpl->residual);
703
704 if (icmnd_cmpl->flags & FCPIO_ICMND_CMPL_RESID_UNDER)
705 xfer_len -= icmnd_cmpl->residual;
706
707 /*
708 * If queue_full, then try to reduce queue depth for all
709 * LUNS on the target. Todo: this should be accompanied
710 * by a periodic queue_depth rampup based on successful
711 * IO completion.
712 */
713 if (icmnd_cmpl->scsi_status == QUEUE_FULL) {
714 struct scsi_device *t_sdev;
715 int qd = 0;
716
717 shost_for_each_device(t_sdev, sc->device->host) {
718 if (t_sdev->id != sc->device->id)
719 continue;
720
721 if (t_sdev->queue_depth > 1) {
722 qd = scsi_track_queue_full
723 (t_sdev,
724 t_sdev->queue_depth - 1);
725 if (qd == -1)
726 qd = t_sdev->host->cmd_per_lun;
727 shost_printk(KERN_INFO,
728 fnic->lport->host,
729 "scsi[%d:%d:%d:%d"
730 "] queue full detected,"
731 "new depth = %d\n",
732 t_sdev->host->host_no,
733 t_sdev->channel,
734 t_sdev->id, t_sdev->lun,
735 t_sdev->queue_depth);
736 }
737 }
738 }
739 break;
740
741 case FCPIO_TIMEOUT: /* request was timed out */
742 sc->result = (DID_TIME_OUT << 16) | icmnd_cmpl->scsi_status;
743 break;
744
745 case FCPIO_ABORTED: /* request was aborted */
746 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
747 break;
748
749 case FCPIO_DATA_CNT_MISMATCH: /* recv/sent more/less data than exp. */
750 scsi_set_resid(sc, icmnd_cmpl->residual);
751 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
752 break;
753
754 case FCPIO_OUT_OF_RESOURCE: /* out of resources to complete request */
755 sc->result = (DID_REQUEUE << 16) | icmnd_cmpl->scsi_status;
756 break;
757 case FCPIO_INVALID_HEADER: /* header contains invalid data */
758 case FCPIO_INVALID_PARAM: /* some parameter in request invalid */
759 case FCPIO_REQ_NOT_SUPPORTED:/* request type is not supported */
760 case FCPIO_IO_NOT_FOUND: /* requested I/O was not found */
761 case FCPIO_SGL_INVALID: /* request was aborted due to sgl error */
762 case FCPIO_MSS_INVALID: /* request was aborted due to mss error */
763 case FCPIO_FW_ERR: /* request was terminated due fw error */
764 default:
765 shost_printk(KERN_ERR, fnic->lport->host, "hdr status = %s\n",
766 fnic_fcpio_status_to_str(hdr_status));
767 sc->result = (DID_ERROR << 16) | icmnd_cmpl->scsi_status;
768 break;
769 }
770
771 /* Break link with the SCSI command */
772 CMD_SP(sc) = NULL;
773
774 spin_unlock_irqrestore(io_lock, flags);
775
776 fnic_release_ioreq_buf(fnic, io_req, sc);
777
778 mempool_free(io_req, fnic->io_req_pool);
779
780 if (sc->sc_data_direction == DMA_FROM_DEVICE) {
781 fnic->lport->host_stats.fcp_input_requests++;
782 fnic->fcp_input_bytes += xfer_len;
783 } else if (sc->sc_data_direction == DMA_TO_DEVICE) {
784 fnic->lport->host_stats.fcp_output_requests++;
785 fnic->fcp_output_bytes += xfer_len;
786 } else
787 fnic->lport->host_stats.fcp_control_requests++;
788
789 /* Call SCSI completion function to complete the IO */
790 if (sc->scsi_done)
791 sc->scsi_done(sc);
792
793}
794
795/* fnic_fcpio_itmf_cmpl_handler
796 * Routine to handle itmf completions
797 */
798static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
799 struct fcpio_fw_req *desc)
800{
801 u8 type;
802 u8 hdr_status;
803 struct fcpio_tag tag;
804 u32 id;
805 struct scsi_cmnd *sc;
806 struct fnic_io_req *io_req;
807 unsigned long flags;
808 spinlock_t *io_lock;
809
810 fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
811 fcpio_tag_id_dec(&tag, &id);
812
813 if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ)
814 return;
815
816 sc = scsi_host_find_tag(fnic->lport->host, id & FNIC_TAG_MASK);
817 WARN_ON_ONCE(!sc);
818 if (!sc)
819 return;
820
821 io_lock = fnic_io_lock_hash(fnic, sc);
822 spin_lock_irqsave(io_lock, flags);
823 io_req = (struct fnic_io_req *)CMD_SP(sc);
824 WARN_ON_ONCE(!io_req);
825 if (!io_req) {
826 spin_unlock_irqrestore(io_lock, flags);
827 return;
828 }
829
830 if (id & FNIC_TAG_ABORT) {
831 /* Completion of abort cmd */
832 if (CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING) {
833 /* This is a late completion. Ignore it */
834 spin_unlock_irqrestore(io_lock, flags);
835 return;
836 }
837 CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
838 CMD_ABTS_STATUS(sc) = hdr_status;
839
840 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
841 "abts cmpl recd. id %d status %s\n",
842 (int)(id & FNIC_TAG_MASK),
843 fnic_fcpio_status_to_str(hdr_status));
844
845 /*
846 * If scsi_eh thread is blocked waiting for abts to complete,
847 * signal completion to it. IO will be cleaned in the thread
848 * else clean it in this context
849 */
850 if (io_req->abts_done) {
851 complete(io_req->abts_done);
852 spin_unlock_irqrestore(io_lock, flags);
853 } else {
854 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
855 "abts cmpl, completing IO\n");
856 CMD_SP(sc) = NULL;
857 sc->result = (DID_ERROR << 16);
858
859 spin_unlock_irqrestore(io_lock, flags);
860
861 fnic_release_ioreq_buf(fnic, io_req, sc);
862 mempool_free(io_req, fnic->io_req_pool);
863 if (sc->scsi_done)
864 sc->scsi_done(sc);
865 }
866
867 } else if (id & FNIC_TAG_DEV_RST) {
868 /* Completion of device reset */
869 CMD_LR_STATUS(sc) = hdr_status;
870 CMD_STATE(sc) = FNIC_IOREQ_CMD_COMPLETE;
871 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
872 "dev reset cmpl recd. id %d status %s\n",
873 (int)(id & FNIC_TAG_MASK),
874 fnic_fcpio_status_to_str(hdr_status));
875 if (io_req->dr_done)
876 complete(io_req->dr_done);
877 spin_unlock_irqrestore(io_lock, flags);
878
879 } else {
880 shost_printk(KERN_ERR, fnic->lport->host,
881 "Unexpected itmf io state %s tag %x\n",
882 fnic_ioreq_state_to_str(CMD_STATE(sc)), id);
883 spin_unlock_irqrestore(io_lock, flags);
884 }
885
886}
887
888/*
889 * fnic_fcpio_cmpl_handler
890 * Routine to service the cq for wq_copy
891 */
892static int fnic_fcpio_cmpl_handler(struct vnic_dev *vdev,
893 unsigned int cq_index,
894 struct fcpio_fw_req *desc)
895{
896 struct fnic *fnic = vnic_dev_priv(vdev);
897 int ret = 0;
898
899 switch (desc->hdr.type) {
900 case FCPIO_ACK: /* fw copied copy wq desc to its queue */
901 fnic_fcpio_ack_handler(fnic, cq_index, desc);
902 break;
903
904 case FCPIO_ICMND_CMPL: /* fw completed a command */
905 fnic_fcpio_icmnd_cmpl_handler(fnic, desc);
906 break;
907
908 case FCPIO_ITMF_CMPL: /* fw completed itmf (abort cmd, lun reset)*/
909 fnic_fcpio_itmf_cmpl_handler(fnic, desc);
910 break;
911
912 case FCPIO_FLOGI_REG_CMPL: /* fw completed flogi_reg */
913 ret = fnic_fcpio_flogi_reg_cmpl_handler(fnic, desc);
914 break;
915
916 case FCPIO_RESET_CMPL: /* fw completed reset */
917 ret = fnic_fcpio_fw_reset_cmpl_handler(fnic, desc);
918 break;
919
920 default:
921 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
922 "firmware completion type %d\n",
923 desc->hdr.type);
924 break;
925 }
926
927 return ret;
928}
929
930/*
931 * fnic_wq_copy_cmpl_handler
932 * Routine to process wq copy
933 */
934int fnic_wq_copy_cmpl_handler(struct fnic *fnic, int copy_work_to_do)
935{
936 unsigned int wq_work_done = 0;
937 unsigned int i, cq_index;
938 unsigned int cur_work_done;
939
940 for (i = 0; i < fnic->wq_copy_count; i++) {
941 cq_index = i + fnic->raw_wq_count + fnic->rq_count;
942 cur_work_done = vnic_cq_copy_service(&fnic->cq[cq_index],
943 fnic_fcpio_cmpl_handler,
944 copy_work_to_do);
945 wq_work_done += cur_work_done;
946 }
947 return wq_work_done;
948}
949
950static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
951{
952 unsigned int i;
953 struct fnic_io_req *io_req;
954 unsigned long flags = 0;
955 struct scsi_cmnd *sc;
956 spinlock_t *io_lock;
957
958 for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
959 if (i == exclude_id)
960 continue;
961
962 sc = scsi_host_find_tag(fnic->lport->host, i);
963 if (!sc)
964 continue;
965
966 io_lock = fnic_io_lock_hash(fnic, sc);
967 spin_lock_irqsave(io_lock, flags);
968 io_req = (struct fnic_io_req *)CMD_SP(sc);
969 if (!io_req) {
970 spin_unlock_irqrestore(io_lock, flags);
971 goto cleanup_scsi_cmd;
972 }
973
974 CMD_SP(sc) = NULL;
975
976 spin_unlock_irqrestore(io_lock, flags);
977
978 /*
979 * If there is a scsi_cmnd associated with this io_req, then
980 * free the corresponding state
981 */
982 fnic_release_ioreq_buf(fnic, io_req, sc);
983 mempool_free(io_req, fnic->io_req_pool);
984
985cleanup_scsi_cmd:
986 sc->result = DID_TRANSPORT_DISRUPTED << 16;
987 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "fnic_cleanup_io:"
988 " DID_TRANSPORT_DISRUPTED\n");
989
990 /* Complete the command to SCSI */
991 if (sc->scsi_done)
992 sc->scsi_done(sc);
993 }
994}
995
996void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
997 struct fcpio_host_req *desc)
998{
999 u32 id;
1000 struct fnic *fnic = vnic_dev_priv(wq->vdev);
1001 struct fnic_io_req *io_req;
1002 struct scsi_cmnd *sc;
1003 unsigned long flags;
1004 spinlock_t *io_lock;
1005
1006 /* get the tag reference */
1007 fcpio_tag_id_dec(&desc->hdr.tag, &id);
1008 id &= FNIC_TAG_MASK;
1009
1010 if (id >= FNIC_MAX_IO_REQ)
1011 return;
1012
1013 sc = scsi_host_find_tag(fnic->lport->host, id);
1014 if (!sc)
1015 return;
1016
1017 io_lock = fnic_io_lock_hash(fnic, sc);
1018 spin_lock_irqsave(io_lock, flags);
1019
1020 /* Get the IO context which this desc refers to */
1021 io_req = (struct fnic_io_req *)CMD_SP(sc);
1022
1023 /* fnic interrupts are turned off by now */
1024
1025 if (!io_req) {
1026 spin_unlock_irqrestore(io_lock, flags);
1027 goto wq_copy_cleanup_scsi_cmd;
1028 }
1029
1030 CMD_SP(sc) = NULL;
1031
1032 spin_unlock_irqrestore(io_lock, flags);
1033
1034 fnic_release_ioreq_buf(fnic, io_req, sc);
1035 mempool_free(io_req, fnic->io_req_pool);
1036
1037wq_copy_cleanup_scsi_cmd:
1038 sc->result = DID_NO_CONNECT << 16;
1039 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "wq_copy_cleanup_handler:"
1040 " DID_NO_CONNECT\n");
1041
1042 if (sc->scsi_done)
1043 sc->scsi_done(sc);
1044}
1045
1046static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
1047 u32 task_req, u8 *fc_lun,
1048 struct fnic_io_req *io_req)
1049{
1050 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1051 unsigned long flags;
1052
1053 spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);
1054
1055 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1056 free_wq_copy_descs(fnic, wq);
1057
1058 if (!vnic_wq_copy_desc_avail(wq)) {
1059 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1060 return 1;
1061 }
1062 fnic_queue_wq_copy_desc_itmf(wq, tag | FNIC_TAG_ABORT,
1063 0, task_req, tag, fc_lun, io_req->port_id,
1064 fnic->config.ra_tov, fnic->config.ed_tov);
1065
1066 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], flags);
1067 return 0;
1068}
1069
1070void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
1071{
1072 int tag;
1073 struct fnic_io_req *io_req;
1074 spinlock_t *io_lock;
1075 unsigned long flags;
1076 struct scsi_cmnd *sc;
1077 struct scsi_lun fc_lun;
1078 enum fnic_ioreq_state old_ioreq_state;
1079
1080 FNIC_SCSI_DBG(KERN_DEBUG,
1081 fnic->lport->host,
1082 "fnic_rport_reset_exch called portid 0x%06x\n",
1083 port_id);
1084
1085 if (fnic->in_remove)
1086 return;
1087
1088 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1089 sc = scsi_host_find_tag(fnic->lport->host, tag);
1090 if (!sc)
1091 continue;
1092
1093 io_lock = fnic_io_lock_hash(fnic, sc);
1094 spin_lock_irqsave(io_lock, flags);
1095
1096 io_req = (struct fnic_io_req *)CMD_SP(sc);
1097
1098 if (!io_req || io_req->port_id != port_id) {
1099 spin_unlock_irqrestore(io_lock, flags);
1100 continue;
1101 }
1102
1103 /*
1104 * Found IO that is still pending with firmware and
1105 * belongs to rport that went away
1106 */
1107 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1108 spin_unlock_irqrestore(io_lock, flags);
1109 continue;
1110 }
1111 old_ioreq_state = CMD_STATE(sc);
1112 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1113 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1114
1115 BUG_ON(io_req->abts_done);
1116
1117 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1118 "fnic_rport_reset_exch: Issuing abts\n");
1119
1120 spin_unlock_irqrestore(io_lock, flags);
1121
1122 /* Now queue the abort command to firmware */
1123 int_to_scsilun(sc->device->lun, &fc_lun);
1124
1125 if (fnic_queue_abort_io_req(fnic, tag,
1126 FCPIO_ITMF_ABT_TASK_TERM,
1127 fc_lun.scsi_lun, io_req)) {
1128 /*
1129 * Revert the cmd state back to old state, if
1130 * it hasnt changed in between. This cmd will get
1131 * aborted later by scsi_eh, or cleaned up during
1132 * lun reset
1133 */
1134 io_lock = fnic_io_lock_hash(fnic, sc);
1135
1136 spin_lock_irqsave(io_lock, flags);
1137 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1138 CMD_STATE(sc) = old_ioreq_state;
1139 spin_unlock_irqrestore(io_lock, flags);
1140 }
1141 }
1142
1143}
1144
1145void fnic_terminate_rport_io(struct fc_rport *rport)
1146{
1147 int tag;
1148 struct fnic_io_req *io_req;
1149 spinlock_t *io_lock;
1150 unsigned long flags;
1151 struct scsi_cmnd *sc;
1152 struct scsi_lun fc_lun;
1153 struct fc_rport_libfc_priv *rdata = rport->dd_data;
1154 struct fc_lport *lport = rdata->local_port;
1155 struct fnic *fnic = lport_priv(lport);
1156 struct fc_rport *cmd_rport;
1157 enum fnic_ioreq_state old_ioreq_state;
1158
1159 FNIC_SCSI_DBG(KERN_DEBUG,
1160 fnic->lport->host, "fnic_terminate_rport_io called"
1161 " wwpn 0x%llx, wwnn0x%llx, portid 0x%06x\n",
1162 rport->port_name, rport->node_name,
1163 rport->port_id);
1164
1165 if (fnic->in_remove)
1166 return;
1167
1168 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1169 sc = scsi_host_find_tag(fnic->lport->host, tag);
1170 if (!sc)
1171 continue;
1172
1173 cmd_rport = starget_to_rport(scsi_target(sc->device));
1174 if (rport != cmd_rport)
1175 continue;
1176
1177 io_lock = fnic_io_lock_hash(fnic, sc);
1178 spin_lock_irqsave(io_lock, flags);
1179
1180 io_req = (struct fnic_io_req *)CMD_SP(sc);
1181
1182 if (!io_req || rport != cmd_rport) {
1183 spin_unlock_irqrestore(io_lock, flags);
1184 continue;
1185 }
1186
1187 /*
1188 * Found IO that is still pending with firmware and
1189 * belongs to rport that went away
1190 */
1191 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1192 spin_unlock_irqrestore(io_lock, flags);
1193 continue;
1194 }
1195 old_ioreq_state = CMD_STATE(sc);
1196 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1197 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1198
1199 BUG_ON(io_req->abts_done);
1200
1201 FNIC_SCSI_DBG(KERN_DEBUG,
1202 fnic->lport->host,
1203 "fnic_terminate_rport_io: Issuing abts\n");
1204
1205 spin_unlock_irqrestore(io_lock, flags);
1206
1207 /* Now queue the abort command to firmware */
1208 int_to_scsilun(sc->device->lun, &fc_lun);
1209
1210 if (fnic_queue_abort_io_req(fnic, tag,
1211 FCPIO_ITMF_ABT_TASK_TERM,
1212 fc_lun.scsi_lun, io_req)) {
1213 /*
1214 * Revert the cmd state back to old state, if
1215 * it hasnt changed in between. This cmd will get
1216 * aborted later by scsi_eh, or cleaned up during
1217 * lun reset
1218 */
1219 io_lock = fnic_io_lock_hash(fnic, sc);
1220
1221 spin_lock_irqsave(io_lock, flags);
1222 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING)
1223 CMD_STATE(sc) = old_ioreq_state;
1224 spin_unlock_irqrestore(io_lock, flags);
1225 }
1226 }
1227
1228}
1229
1230static void fnic_block_error_handler(struct scsi_cmnd *sc)
1231{
1232 struct Scsi_Host *shost = sc->device->host;
1233 struct fc_rport *rport = starget_to_rport(scsi_target(sc->device));
1234 unsigned long flags;
1235
1236 spin_lock_irqsave(shost->host_lock, flags);
1237 while (rport->port_state == FC_PORTSTATE_BLOCKED) {
1238 spin_unlock_irqrestore(shost->host_lock, flags);
1239 msleep(1000);
1240 spin_lock_irqsave(shost->host_lock, flags);
1241 }
1242 spin_unlock_irqrestore(shost->host_lock, flags);
1243
1244}
1245
1246/*
1247 * This function is exported to SCSI for sending abort cmnds.
1248 * A SCSI IO is represented by a io_req in the driver.
1249 * The ioreq is linked to the SCSI Cmd, thus a link with the ULP's IO.
1250 */
1251int fnic_abort_cmd(struct scsi_cmnd *sc)
1252{
1253 struct fc_lport *lp;
1254 struct fnic *fnic;
1255 struct fnic_io_req *io_req;
1256 struct fc_rport *rport;
1257 spinlock_t *io_lock;
1258 unsigned long flags;
1259 int ret = SUCCESS;
1260 u32 task_req;
1261 struct scsi_lun fc_lun;
1262 DECLARE_COMPLETION_ONSTACK(tm_done);
1263
1264 /* Wait for rport to unblock */
1265 fnic_block_error_handler(sc);
1266
1267 /* Get local-port, check ready and link up */
1268 lp = shost_priv(sc->device->host);
1269
1270 fnic = lport_priv(lp);
1271 FNIC_SCSI_DBG(KERN_DEBUG,
1272 fnic->lport->host,
1273 "Abort Cmd called FCID 0x%x, LUN 0x%x TAG %d\n",
1274 (starget_to_rport(scsi_target(sc->device)))->port_id,
1275 sc->device->lun, sc->request->tag);
1276
1277 if (lp->state != LPORT_ST_READY || !(lp->link_up)) {
1278 ret = FAILED;
1279 goto fnic_abort_cmd_end;
1280 }
1281
1282 /*
1283 * Avoid a race between SCSI issuing the abort and the device
1284 * completing the command.
1285 *
1286 * If the command is already completed by the fw cmpl code,
1287 * we just return SUCCESS from here. This means that the abort
1288 * succeeded. In the SCSI ML, since the timeout for command has
1289 * happened, the completion wont actually complete the command
1290 * and it will be considered as an aborted command
1291 *
1292 * The CMD_SP will not be cleared except while holding io_req_lock.
1293 */
1294 io_lock = fnic_io_lock_hash(fnic, sc);
1295 spin_lock_irqsave(io_lock, flags);
1296 io_req = (struct fnic_io_req *)CMD_SP(sc);
1297 if (!io_req) {
1298 spin_unlock_irqrestore(io_lock, flags);
1299 goto fnic_abort_cmd_end;
1300 }
1301
1302 io_req->abts_done = &tm_done;
1303
1304 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1305 spin_unlock_irqrestore(io_lock, flags);
1306 goto wait_pending;
1307 }
1308 /*
1309 * Command is still pending, need to abort it
1310 * If the firmware completes the command after this point,
1311 * the completion wont be done till mid-layer, since abort
1312 * has already started.
1313 */
1314 CMD_STATE(sc) = FNIC_IOREQ_ABTS_PENDING;
1315 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1316
1317 spin_unlock_irqrestore(io_lock, flags);
1318
1319 /*
1320 * Check readiness of the remote port. If the path to remote
1321 * port is up, then send abts to the remote port to terminate
1322 * the IO. Else, just locally terminate the IO in the firmware
1323 */
1324 rport = starget_to_rport(scsi_target(sc->device));
1325 if (fc_remote_port_chkready(rport) == 0)
1326 task_req = FCPIO_ITMF_ABT_TASK;
1327 else
1328 task_req = FCPIO_ITMF_ABT_TASK_TERM;
1329
1330 /* Now queue the abort command to firmware */
1331 int_to_scsilun(sc->device->lun, &fc_lun);
1332
1333 if (fnic_queue_abort_io_req(fnic, sc->request->tag, task_req,
1334 fc_lun.scsi_lun, io_req)) {
1335 spin_lock_irqsave(io_lock, flags);
1336 io_req = (struct fnic_io_req *)CMD_SP(sc);
1337 if (io_req)
1338 io_req->abts_done = NULL;
1339 spin_unlock_irqrestore(io_lock, flags);
1340 ret = FAILED;
1341 goto fnic_abort_cmd_end;
1342 }
1343
1344 /*
1345 * We queued an abort IO, wait for its completion.
1346 * Once the firmware completes the abort command, it will
1347 * wake up this thread.
1348 */
1349 wait_pending:
1350 wait_for_completion_timeout(&tm_done,
1351 msecs_to_jiffies
1352 (2 * fnic->config.ra_tov +
1353 fnic->config.ed_tov));
1354
1355 /* Check the abort status */
1356 spin_lock_irqsave(io_lock, flags);
1357
1358 io_req = (struct fnic_io_req *)CMD_SP(sc);
1359 if (!io_req) {
1360 spin_unlock_irqrestore(io_lock, flags);
1361 ret = FAILED;
1362 goto fnic_abort_cmd_end;
1363 }
1364 io_req->abts_done = NULL;
1365
1366 /* fw did not complete abort, timed out */
1367 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1368 spin_unlock_irqrestore(io_lock, flags);
1369 ret = FAILED;
1370 goto fnic_abort_cmd_end;
1371 }
1372
1373 /*
1374 * firmware completed the abort, check the status,
1375 * free the io_req irrespective of failure or success
1376 */
1377 if (CMD_ABTS_STATUS(sc) != FCPIO_SUCCESS)
1378 ret = FAILED;
1379
1380 CMD_SP(sc) = NULL;
1381
1382 spin_unlock_irqrestore(io_lock, flags);
1383
1384 fnic_release_ioreq_buf(fnic, io_req, sc);
1385 mempool_free(io_req, fnic->io_req_pool);
1386
1387fnic_abort_cmd_end:
1388 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1389 "Returning from abort cmd %s\n",
1390 (ret == SUCCESS) ?
1391 "SUCCESS" : "FAILED");
1392 return ret;
1393}
1394
1395static inline int fnic_queue_dr_io_req(struct fnic *fnic,
1396 struct scsi_cmnd *sc,
1397 struct fnic_io_req *io_req)
1398{
1399 struct vnic_wq_copy *wq = &fnic->wq_copy[0];
1400 struct scsi_lun fc_lun;
1401 int ret = 0;
1402 unsigned long intr_flags;
1403
1404 spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);
1405
1406 if (vnic_wq_copy_desc_avail(wq) <= fnic->wq_copy_desc_low[0])
1407 free_wq_copy_descs(fnic, wq);
1408
1409 if (!vnic_wq_copy_desc_avail(wq)) {
1410 ret = -EAGAIN;
1411 goto lr_io_req_end;
1412 }
1413
1414 /* fill in the lun info */
1415 int_to_scsilun(sc->device->lun, &fc_lun);
1416
1417 fnic_queue_wq_copy_desc_itmf(wq, sc->request->tag | FNIC_TAG_DEV_RST,
1418 0, FCPIO_ITMF_LUN_RESET, SCSI_NO_TAG,
1419 fc_lun.scsi_lun, io_req->port_id,
1420 fnic->config.ra_tov, fnic->config.ed_tov);
1421
1422lr_io_req_end:
1423 spin_unlock_irqrestore(&fnic->wq_copy_lock[0], intr_flags);
1424
1425 return ret;
1426}
1427
1428/*
1429 * Clean up any pending aborts on the lun
1430 * For each outstanding IO on this lun, whose abort is not completed by fw,
1431 * issue a local abort. Wait for abort to complete. Return 0 if all commands
1432 * successfully aborted, 1 otherwise
1433 */
1434static int fnic_clean_pending_aborts(struct fnic *fnic,
1435 struct scsi_cmnd *lr_sc)
1436{
1437 int tag;
1438 struct fnic_io_req *io_req;
1439 spinlock_t *io_lock;
1440 unsigned long flags;
1441 int ret = 0;
1442 struct scsi_cmnd *sc;
1443 struct fc_rport *rport;
1444 struct scsi_lun fc_lun;
1445 struct scsi_device *lun_dev = lr_sc->device;
1446 DECLARE_COMPLETION_ONSTACK(tm_done);
1447
1448 for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
1449 sc = scsi_host_find_tag(fnic->lport->host, tag);
1450 /*
1451 * ignore this lun reset cmd or cmds that do not belong to
1452 * this lun
1453 */
1454 if (!sc || sc == lr_sc || sc->device != lun_dev)
1455 continue;
1456
1457 io_lock = fnic_io_lock_hash(fnic, sc);
1458 spin_lock_irqsave(io_lock, flags);
1459
1460 io_req = (struct fnic_io_req *)CMD_SP(sc);
1461
1462 if (!io_req || sc->device != lun_dev) {
1463 spin_unlock_irqrestore(io_lock, flags);
1464 continue;
1465 }
1466
1467 /*
1468 * Found IO that is still pending with firmware and
1469 * belongs to the LUN that we are resetting
1470 */
1471 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1472 "Found IO in %s on lun\n",
1473 fnic_ioreq_state_to_str(CMD_STATE(sc)));
1474
1475 BUG_ON(CMD_STATE(sc) != FNIC_IOREQ_ABTS_PENDING);
1476
1477 CMD_ABTS_STATUS(sc) = FCPIO_INVALID_CODE;
1478 io_req->abts_done = &tm_done;
1479 spin_unlock_irqrestore(io_lock, flags);
1480
1481 /* Now queue the abort command to firmware */
1482 int_to_scsilun(sc->device->lun, &fc_lun);
1483 rport = starget_to_rport(scsi_target(sc->device));
1484
1485 if (fnic_queue_abort_io_req(fnic, tag,
1486 FCPIO_ITMF_ABT_TASK_TERM,
1487 fc_lun.scsi_lun, io_req)) {
1488 spin_lock_irqsave(io_lock, flags);
1489 io_req = (struct fnic_io_req *)CMD_SP(sc);
1490 if (io_req)
1491 io_req->abts_done = NULL;
1492 spin_unlock_irqrestore(io_lock, flags);
1493 ret = 1;
1494 goto clean_pending_aborts_end;
1495 }
1496
1497 wait_for_completion_timeout(&tm_done,
1498 msecs_to_jiffies
1499 (fnic->config.ed_tov));
1500
1501 /* Recheck cmd state to check if it is now aborted */
1502 spin_lock_irqsave(io_lock, flags);
1503 io_req = (struct fnic_io_req *)CMD_SP(sc);
1504 if (!io_req) {
1505 spin_unlock_irqrestore(io_lock, flags);
1506 ret = 1;
1507 goto clean_pending_aborts_end;
1508 }
1509
1510 io_req->abts_done = NULL;
1511
1512 /* if abort is still pending with fw, fail */
1513 if (CMD_STATE(sc) == FNIC_IOREQ_ABTS_PENDING) {
1514 spin_unlock_irqrestore(io_lock, flags);
1515 ret = 1;
1516 goto clean_pending_aborts_end;
1517 }
1518 CMD_SP(sc) = NULL;
1519 spin_unlock_irqrestore(io_lock, flags);
1520
1521 fnic_release_ioreq_buf(fnic, io_req, sc);
1522 mempool_free(io_req, fnic->io_req_pool);
1523 }
1524
1525clean_pending_aborts_end:
1526 return ret;
1527}
1528
1529/*
1530 * SCSI Eh thread issues a Lun Reset when one or more commands on a LUN
1531 * fail to get aborted. It calls driver's eh_device_reset with a SCSI command
1532 * on the LUN.
1533 */
1534int fnic_device_reset(struct scsi_cmnd *sc)
1535{
1536 struct fc_lport *lp;
1537 struct fnic *fnic;
1538 struct fnic_io_req *io_req;
1539 struct fc_rport *rport;
1540 int status;
1541 int ret = FAILED;
1542 spinlock_t *io_lock;
1543 unsigned long flags;
1544 DECLARE_COMPLETION_ONSTACK(tm_done);
1545
1546 /* Wait for rport to unblock */
1547 fnic_block_error_handler(sc);
1548
1549 /* Get local-port, check ready and link up */
1550 lp = shost_priv(sc->device->host);
1551
1552 fnic = lport_priv(lp);
1553 FNIC_SCSI_DBG(KERN_DEBUG,
1554 fnic->lport->host,
1555 "Device reset called FCID 0x%x, LUN 0x%x\n",
1556 (starget_to_rport(scsi_target(sc->device)))->port_id,
1557 sc->device->lun);
1558
1559
1560 if (lp->state != LPORT_ST_READY || !(lp->link_up))
1561 goto fnic_device_reset_end;
1562
1563 /* Check if remote port up */
1564 rport = starget_to_rport(scsi_target(sc->device));
1565 if (fc_remote_port_chkready(rport))
1566 goto fnic_device_reset_end;
1567
1568 io_lock = fnic_io_lock_hash(fnic, sc);
1569 spin_lock_irqsave(io_lock, flags);
1570 io_req = (struct fnic_io_req *)CMD_SP(sc);
1571
1572 /*
1573 * If there is a io_req attached to this command, then use it,
1574 * else allocate a new one.
1575 */
1576 if (!io_req) {
1577 io_req = mempool_alloc(fnic->io_req_pool, GFP_ATOMIC);
1578 if (!io_req) {
1579 spin_unlock_irqrestore(io_lock, flags);
1580 goto fnic_device_reset_end;
1581 }
1582 memset(io_req, 0, sizeof(*io_req));
1583 io_req->port_id = rport->port_id;
1584 CMD_SP(sc) = (char *)io_req;
1585 }
1586 io_req->dr_done = &tm_done;
1587 CMD_STATE(sc) = FNIC_IOREQ_CMD_PENDING;
1588 CMD_LR_STATUS(sc) = FCPIO_INVALID_CODE;
1589 spin_unlock_irqrestore(io_lock, flags);
1590
1591 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host, "TAG %d\n",
1592 sc->request->tag);
1593
1594 /*
1595 * issue the device reset, if enqueue failed, clean up the ioreq
1596 * and break assoc with scsi cmd
1597 */
1598 if (fnic_queue_dr_io_req(fnic, sc, io_req)) {
1599 spin_lock_irqsave(io_lock, flags);
1600 io_req = (struct fnic_io_req *)CMD_SP(sc);
1601 if (io_req)
1602 io_req->dr_done = NULL;
1603 goto fnic_device_reset_clean;
1604 }
1605
1606 /*
1607 * Wait on the local completion for LUN reset. The io_req may be
1608 * freed while we wait since we hold no lock.
1609 */
1610 wait_for_completion_timeout(&tm_done,
1611 msecs_to_jiffies(FNIC_LUN_RESET_TIMEOUT));
1612
1613 spin_lock_irqsave(io_lock, flags);
1614 io_req = (struct fnic_io_req *)CMD_SP(sc);
1615 if (!io_req) {
1616 spin_unlock_irqrestore(io_lock, flags);
1617 goto fnic_device_reset_end;
1618 }
1619 io_req->dr_done = NULL;
1620
1621 status = CMD_LR_STATUS(sc);
1622 spin_unlock_irqrestore(io_lock, flags);
1623
1624 /*
1625 * If lun reset not completed, bail out with failed. io_req
1626 * gets cleaned up during higher levels of EH
1627 */
1628 if (status == FCPIO_INVALID_CODE) {
1629 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1630 "Device reset timed out\n");
1631 goto fnic_device_reset_end;
1632 }
1633
1634 /* Completed, but not successful, clean up the io_req, return fail */
1635 if (status != FCPIO_SUCCESS) {
1636 spin_lock_irqsave(io_lock, flags);
1637 FNIC_SCSI_DBG(KERN_DEBUG,
1638 fnic->lport->host,
1639 "Device reset completed - failed\n");
1640 io_req = (struct fnic_io_req *)CMD_SP(sc);
1641 goto fnic_device_reset_clean;
1642 }
1643
1644 /*
1645 * Clean up any aborts on this lun that have still not
1646 * completed. If any of these fail, then LUN reset fails.
1647 * clean_pending_aborts cleans all cmds on this lun except
1648 * the lun reset cmd. If all cmds get cleaned, the lun reset
1649 * succeeds
1650 */
1651 if (fnic_clean_pending_aborts(fnic, sc)) {
1652 spin_lock_irqsave(io_lock, flags);
1653 io_req = (struct fnic_io_req *)CMD_SP(sc);
1654 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1655 "Device reset failed"
1656 " since could not abort all IOs\n");
1657 goto fnic_device_reset_clean;
1658 }
1659
1660 /* Clean lun reset command */
1661 spin_lock_irqsave(io_lock, flags);
1662 io_req = (struct fnic_io_req *)CMD_SP(sc);
1663 if (io_req)
1664 /* Completed, and successful */
1665 ret = SUCCESS;
1666
1667fnic_device_reset_clean:
1668 if (io_req)
1669 CMD_SP(sc) = NULL;
1670
1671 spin_unlock_irqrestore(io_lock, flags);
1672
1673 if (io_req) {
1674 fnic_release_ioreq_buf(fnic, io_req, sc);
1675 mempool_free(io_req, fnic->io_req_pool);
1676 }
1677
1678fnic_device_reset_end:
1679 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1680 "Returning from device reset %s\n",
1681 (ret == SUCCESS) ?
1682 "SUCCESS" : "FAILED");
1683 return ret;
1684}
1685
1686/* Clean up all IOs, clean up libFC local port */
1687int fnic_reset(struct Scsi_Host *shost)
1688{
1689 struct fc_lport *lp;
1690 struct fnic *fnic;
1691 int ret = SUCCESS;
1692
1693 lp = shost_priv(shost);
1694 fnic = lport_priv(lp);
1695
1696 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1697 "fnic_reset called\n");
1698
1699 /*
1700 * Reset local port, this will clean up libFC exchanges,
1701 * reset remote port sessions, and if link is up, begin flogi
1702 */
1703 if (lp->tt.lport_reset(lp))
1704 ret = FAILED;
1705
1706 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1707 "Returning from fnic reset %s\n",
1708 (ret == SUCCESS) ?
1709 "SUCCESS" : "FAILED");
1710
1711 return ret;
1712}
1713
1714/*
1715 * SCSI Error handling calls driver's eh_host_reset if all prior
1716 * error handling levels return FAILED. If host reset completes
1717 * successfully, and if link is up, then Fabric login begins.
1718 *
1719 * Host Reset is the highest level of error recovery. If this fails, then
1720 * host is offlined by SCSI.
1721 *
1722 */
1723int fnic_host_reset(struct scsi_cmnd *sc)
1724{
1725 int ret;
1726 unsigned long wait_host_tmo;
1727 struct Scsi_Host *shost = sc->device->host;
1728 struct fc_lport *lp = shost_priv(shost);
1729
1730 /*
1731 * If fnic_reset is successful, wait for fabric login to complete
1732 * scsi-ml tries to send a TUR to every device if host reset is
1733 * successful, so before returning to scsi, fabric should be up
1734 */
1735 ret = fnic_reset(shost);
1736 if (ret == SUCCESS) {
1737 wait_host_tmo = jiffies + FNIC_HOST_RESET_SETTLE_TIME * HZ;
1738 ret = FAILED;
1739 while (time_before(jiffies, wait_host_tmo)) {
1740 if ((lp->state == LPORT_ST_READY) &&
1741 (lp->link_up)) {
1742 ret = SUCCESS;
1743 break;
1744 }
1745 ssleep(1);
1746 }
1747 }
1748
1749 return ret;
1750}
1751
1752/*
1753 * This fxn is called from libFC when host is removed
1754 */
1755void fnic_scsi_abort_io(struct fc_lport *lp)
1756{
1757 int err = 0;
1758 unsigned long flags;
1759 enum fnic_state old_state;
1760 struct fnic *fnic = lport_priv(lp);
1761 DECLARE_COMPLETION_ONSTACK(remove_wait);
1762
1763 /* Issue firmware reset for fnic, wait for reset to complete */
1764 spin_lock_irqsave(&fnic->fnic_lock, flags);
1765 fnic->remove_wait = &remove_wait;
1766 old_state = fnic->state;
1767 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1768 vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
1769 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1770
1771 err = fnic_fw_reset_handler(fnic);
1772 if (err) {
1773 spin_lock_irqsave(&fnic->fnic_lock, flags);
1774 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1775 fnic->state = old_state;
1776 fnic->remove_wait = NULL;
1777 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1778 return;
1779 }
1780
1781 /* Wait for firmware reset to complete */
1782 wait_for_completion_timeout(&remove_wait,
1783 msecs_to_jiffies(FNIC_RMDEVICE_TIMEOUT));
1784
1785 spin_lock_irqsave(&fnic->fnic_lock, flags);
1786 fnic->remove_wait = NULL;
1787 FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
1788 "fnic_scsi_abort_io %s\n",
1789 (fnic->state == FNIC_IN_ETH_MODE) ?
1790 "SUCCESS" : "FAILED");
1791 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1792
1793}
1794
1795/*
1796 * This fxn called from libFC to clean up driver IO state on link down
1797 */
1798void fnic_scsi_cleanup(struct fc_lport *lp)
1799{
1800 unsigned long flags;
1801 enum fnic_state old_state;
1802 struct fnic *fnic = lport_priv(lp);
1803
1804 /* issue fw reset */
1805 spin_lock_irqsave(&fnic->fnic_lock, flags);
1806 old_state = fnic->state;
1807 fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
1808 vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
1809 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1810
1811 if (fnic_fw_reset_handler(fnic)) {
1812 spin_lock_irqsave(&fnic->fnic_lock, flags);
1813 if (fnic->state == FNIC_IN_FC_TRANS_ETH_MODE)
1814 fnic->state = old_state;
1815 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
1816 }
1817
1818}
1819
1820void fnic_empty_scsi_cleanup(struct fc_lport *lp)
1821{
1822}
1823
1824void fnic_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
1825{
1826 struct fnic *fnic = lport_priv(lp);
1827
1828 /* Non-zero sid, nothing to do */
1829 if (sid)
1830 goto call_fc_exch_mgr_reset;
1831
1832 if (did) {
1833 fnic_rport_exch_reset(fnic, did);
1834 goto call_fc_exch_mgr_reset;
1835 }
1836
1837 /*
1838 * sid = 0, did = 0
1839 * link down or device being removed
1840 */
1841 if (!fnic->in_remove)
1842 fnic_scsi_cleanup(lp);
1843 else
1844 fnic_scsi_abort_io(lp);
1845
1846 /* call libFC exch mgr reset to reset its exchanges */
1847call_fc_exch_mgr_reset:
1848 fc_exch_mgr_reset(lp, sid, did);
1849
1850}
diff --git a/drivers/scsi/fnic/rq_enet_desc.h b/drivers/scsi/fnic/rq_enet_desc.h
new file mode 100644
index 000000000000..92e80ae6b725
--- /dev/null
+++ b/drivers/scsi/fnic/rq_enet_desc.h
@@ -0,0 +1,58 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _RQ_ENET_DESC_H_
19#define _RQ_ENET_DESC_H_
20
21/* Ethernet receive queue descriptor: 16B */
22struct rq_enet_desc {
23 __le64 address;
24 __le16 length_type;
25 u8 reserved[6];
26};
27
28enum rq_enet_type_types {
29 RQ_ENET_TYPE_ONLY_SOP = 0,
30 RQ_ENET_TYPE_NOT_SOP = 1,
31 RQ_ENET_TYPE_RESV2 = 2,
32 RQ_ENET_TYPE_RESV3 = 3,
33};
34
35#define RQ_ENET_ADDR_BITS 64
36#define RQ_ENET_LEN_BITS 14
37#define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1)
38#define RQ_ENET_TYPE_BITS 2
39#define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1)
40
41static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
42 u64 address, u8 type, u16 length)
43{
44 desc->address = cpu_to_le64(address);
45 desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
46 ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
47}
48
49static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
50 u64 *address, u8 *type, u16 *length)
51{
52 *address = le64_to_cpu(desc->address);
53 *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
54 *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
55 RQ_ENET_TYPE_MASK);
56}
57
58#endif /* _RQ_ENET_DESC_H_ */
diff --git a/drivers/scsi/fnic/vnic_cq.c b/drivers/scsi/fnic/vnic_cq.c
new file mode 100644
index 000000000000..c5db32eda5ef
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_cq.c
@@ -0,0 +1,85 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#include <linux/errno.h>
19#include <linux/types.h>
20#include <linux/pci.h>
21#include "vnic_dev.h"
22#include "vnic_cq.h"
23
24void vnic_cq_free(struct vnic_cq *cq)
25{
26 vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
27
28 cq->ctrl = NULL;
29}
30
31int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
32 unsigned int desc_count, unsigned int desc_size)
33{
34 int err;
35
36 cq->index = index;
37 cq->vdev = vdev;
38
39 cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
40 if (!cq->ctrl) {
41 printk(KERN_ERR "Failed to hook CQ[%d] resource\n", index);
42 return -EINVAL;
43 }
44
45 err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
46 if (err)
47 return err;
48
49 return 0;
50}
51
52void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
53 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
54 unsigned int cq_tail_color, unsigned int interrupt_enable,
55 unsigned int cq_entry_enable, unsigned int cq_message_enable,
56 unsigned int interrupt_offset, u64 cq_message_addr)
57{
58 u64 paddr;
59
60 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
61 writeq(paddr, &cq->ctrl->ring_base);
62 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
63 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
64 iowrite32(color_enable, &cq->ctrl->color_enable);
65 iowrite32(cq_head, &cq->ctrl->cq_head);
66 iowrite32(cq_tail, &cq->ctrl->cq_tail);
67 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
68 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
69 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
70 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
71 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
72 writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
73}
74
75void vnic_cq_clean(struct vnic_cq *cq)
76{
77 cq->to_clean = 0;
78 cq->last_color = 0;
79
80 iowrite32(0, &cq->ctrl->cq_head);
81 iowrite32(0, &cq->ctrl->cq_tail);
82 iowrite32(1, &cq->ctrl->cq_tail_color);
83
84 vnic_dev_clear_desc_ring(&cq->ring);
85}
diff --git a/drivers/scsi/fnic/vnic_cq.h b/drivers/scsi/fnic/vnic_cq.h
new file mode 100644
index 000000000000..4ede6809fb1e
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_cq.h
@@ -0,0 +1,121 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_CQ_H_
19#define _VNIC_CQ_H_
20
21#include "cq_desc.h"
22#include "vnic_dev.h"
23
24/*
25 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
26 * Driver) when both are built with CONFIG options =y
27 */
28#define vnic_cq_service fnic_cq_service
29#define vnic_cq_free fnic_cq_free
30#define vnic_cq_alloc fnic_cq_alloc
31#define vnic_cq_init fnic_cq_init
32#define vnic_cq_clean fnic_cq_clean
33
34/* Completion queue control */
35struct vnic_cq_ctrl {
36 u64 ring_base; /* 0x00 */
37 u32 ring_size; /* 0x08 */
38 u32 pad0;
39 u32 flow_control_enable; /* 0x10 */
40 u32 pad1;
41 u32 color_enable; /* 0x18 */
42 u32 pad2;
43 u32 cq_head; /* 0x20 */
44 u32 pad3;
45 u32 cq_tail; /* 0x28 */
46 u32 pad4;
47 u32 cq_tail_color; /* 0x30 */
48 u32 pad5;
49 u32 interrupt_enable; /* 0x38 */
50 u32 pad6;
51 u32 cq_entry_enable; /* 0x40 */
52 u32 pad7;
53 u32 cq_message_enable; /* 0x48 */
54 u32 pad8;
55 u32 interrupt_offset; /* 0x50 */
56 u32 pad9;
57 u64 cq_message_addr; /* 0x58 */
58 u32 pad10;
59};
60
61struct vnic_cq {
62 unsigned int index;
63 struct vnic_dev *vdev;
64 struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
65 struct vnic_dev_ring ring;
66 unsigned int to_clean;
67 unsigned int last_color;
68};
69
70static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
71 unsigned int work_to_do,
72 int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
73 u8 type, u16 q_number, u16 completed_index, void *opaque),
74 void *opaque)
75{
76 struct cq_desc *cq_desc;
77 unsigned int work_done = 0;
78 u16 q_number, completed_index;
79 u8 type, color;
80
81 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
82 cq->ring.desc_size * cq->to_clean);
83 cq_desc_dec(cq_desc, &type, &color,
84 &q_number, &completed_index);
85
86 while (color != cq->last_color) {
87
88 if ((*q_service)(cq->vdev, cq_desc, type,
89 q_number, completed_index, opaque))
90 break;
91
92 cq->to_clean++;
93 if (cq->to_clean == cq->ring.desc_count) {
94 cq->to_clean = 0;
95 cq->last_color = cq->last_color ? 0 : 1;
96 }
97
98 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
99 cq->ring.desc_size * cq->to_clean);
100 cq_desc_dec(cq_desc, &type, &color,
101 &q_number, &completed_index);
102
103 work_done++;
104 if (work_done >= work_to_do)
105 break;
106 }
107
108 return work_done;
109}
110
111void vnic_cq_free(struct vnic_cq *cq);
112int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
113 unsigned int desc_count, unsigned int desc_size);
114void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
115 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
116 unsigned int cq_tail_color, unsigned int interrupt_enable,
117 unsigned int cq_entry_enable, unsigned int message_enable,
118 unsigned int interrupt_offset, u64 message_addr);
119void vnic_cq_clean(struct vnic_cq *cq);
120
121#endif /* _VNIC_CQ_H_ */
diff --git a/drivers/scsi/fnic/vnic_cq_copy.h b/drivers/scsi/fnic/vnic_cq_copy.h
new file mode 100644
index 000000000000..7901ce255a81
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_cq_copy.h
@@ -0,0 +1,62 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_CQ_COPY_H_
19#define _VNIC_CQ_COPY_H_
20
21#include "fcpio.h"
22
23static inline unsigned int vnic_cq_copy_service(
24 struct vnic_cq *cq,
25 int (*q_service)(struct vnic_dev *vdev,
26 unsigned int index,
27 struct fcpio_fw_req *desc),
28 unsigned int work_to_do)
29
30{
31 struct fcpio_fw_req *desc;
32 unsigned int work_done = 0;
33 u8 color;
34
35 desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
36 cq->ring.desc_size * cq->to_clean);
37 fcpio_color_dec(desc, &color);
38
39 while (color != cq->last_color) {
40
41 if ((*q_service)(cq->vdev, cq->index, desc))
42 break;
43
44 cq->to_clean++;
45 if (cq->to_clean == cq->ring.desc_count) {
46 cq->to_clean = 0;
47 cq->last_color = cq->last_color ? 0 : 1;
48 }
49
50 desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
51 cq->ring.desc_size * cq->to_clean);
52 fcpio_color_dec(desc, &color);
53
54 work_done++;
55 if (work_done >= work_to_do)
56 break;
57 }
58
59 return work_done;
60}
61
62#endif /* _VNIC_CQ_COPY_H_ */
diff --git a/drivers/scsi/fnic/vnic_dev.c b/drivers/scsi/fnic/vnic_dev.c
new file mode 100644
index 000000000000..566770645086
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_dev.c
@@ -0,0 +1,690 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18
19#include <linux/kernel.h>
20#include <linux/errno.h>
21#include <linux/types.h>
22#include <linux/pci.h>
23#include <linux/delay.h>
24#include <linux/if_ether.h>
25#include "vnic_resource.h"
26#include "vnic_devcmd.h"
27#include "vnic_dev.h"
28#include "vnic_stats.h"
29
30struct vnic_res {
31 void __iomem *vaddr;
32 unsigned int count;
33};
34
35struct vnic_dev {
36 void *priv;
37 struct pci_dev *pdev;
38 struct vnic_res res[RES_TYPE_MAX];
39 enum vnic_dev_intr_mode intr_mode;
40 struct vnic_devcmd __iomem *devcmd;
41 struct vnic_devcmd_notify *notify;
42 struct vnic_devcmd_notify notify_copy;
43 dma_addr_t notify_pa;
44 u32 *linkstatus;
45 dma_addr_t linkstatus_pa;
46 struct vnic_stats *stats;
47 dma_addr_t stats_pa;
48 struct vnic_devcmd_fw_info *fw_info;
49 dma_addr_t fw_info_pa;
50};
51
52#define VNIC_MAX_RES_HDR_SIZE \
53 (sizeof(struct vnic_resource_header) + \
54 sizeof(struct vnic_resource) * RES_TYPE_MAX)
55#define VNIC_RES_STRIDE 128
56
57void *vnic_dev_priv(struct vnic_dev *vdev)
58{
59 return vdev->priv;
60}
61
62static int vnic_dev_discover_res(struct vnic_dev *vdev,
63 struct vnic_dev_bar *bar)
64{
65 struct vnic_resource_header __iomem *rh;
66 struct vnic_resource __iomem *r;
67 u8 type;
68
69 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
70 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
71 return -EINVAL;
72 }
73
74 rh = bar->vaddr;
75 if (!rh) {
76 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
77 return -EINVAL;
78 }
79
80 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
81 ioread32(&rh->version) != VNIC_RES_VERSION) {
82 printk(KERN_ERR "vNIC BAR0 res magic/version error "
83 "exp (%lx/%lx) curr (%x/%x)\n",
84 VNIC_RES_MAGIC, VNIC_RES_VERSION,
85 ioread32(&rh->magic), ioread32(&rh->version));
86 return -EINVAL;
87 }
88
89 r = (struct vnic_resource __iomem *)(rh + 1);
90
91 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
92
93 u8 bar_num = ioread8(&r->bar);
94 u32 bar_offset = ioread32(&r->bar_offset);
95 u32 count = ioread32(&r->count);
96 u32 len;
97
98 r++;
99
100 if (bar_num != 0) /* only mapping in BAR0 resources */
101 continue;
102
103 switch (type) {
104 case RES_TYPE_WQ:
105 case RES_TYPE_RQ:
106 case RES_TYPE_CQ:
107 case RES_TYPE_INTR_CTRL:
108 /* each count is stride bytes long */
109 len = count * VNIC_RES_STRIDE;
110 if (len + bar_offset > bar->len) {
111 printk(KERN_ERR "vNIC BAR0 resource %d "
112 "out-of-bounds, offset 0x%x + "
113 "size 0x%x > bar len 0x%lx\n",
114 type, bar_offset,
115 len,
116 bar->len);
117 return -EINVAL;
118 }
119 break;
120 case RES_TYPE_INTR_PBA_LEGACY:
121 case RES_TYPE_DEVCMD:
122 len = count;
123 break;
124 default:
125 continue;
126 }
127
128 vdev->res[type].count = count;
129 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
130 }
131
132 return 0;
133}
134
135unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
136 enum vnic_res_type type)
137{
138 return vdev->res[type].count;
139}
140
141void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
142 unsigned int index)
143{
144 if (!vdev->res[type].vaddr)
145 return NULL;
146
147 switch (type) {
148 case RES_TYPE_WQ:
149 case RES_TYPE_RQ:
150 case RES_TYPE_CQ:
151 case RES_TYPE_INTR_CTRL:
152 return (char __iomem *)vdev->res[type].vaddr +
153 index * VNIC_RES_STRIDE;
154 default:
155 return (char __iomem *)vdev->res[type].vaddr;
156 }
157}
158
159unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
160 unsigned int desc_count,
161 unsigned int desc_size)
162{
163 /* The base address of the desc rings must be 512 byte aligned.
164 * Descriptor count is aligned to groups of 32 descriptors. A
165 * count of 0 means the maximum 4096 descriptors. Descriptor
166 * size is aligned to 16 bytes.
167 */
168
169 unsigned int count_align = 32;
170 unsigned int desc_align = 16;
171
172 ring->base_align = 512;
173
174 if (desc_count == 0)
175 desc_count = 4096;
176
177 ring->desc_count = ALIGN(desc_count, count_align);
178
179 ring->desc_size = ALIGN(desc_size, desc_align);
180
181 ring->size = ring->desc_count * ring->desc_size;
182 ring->size_unaligned = ring->size + ring->base_align;
183
184 return ring->size_unaligned;
185}
186
187void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
188{
189 memset(ring->descs, 0, ring->size);
190}
191
192int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
193 unsigned int desc_count, unsigned int desc_size)
194{
195 vnic_dev_desc_ring_size(ring, desc_count, desc_size);
196
197 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
198 ring->size_unaligned,
199 &ring->base_addr_unaligned);
200
201 if (!ring->descs_unaligned) {
202 printk(KERN_ERR
203 "Failed to allocate ring (size=%d), aborting\n",
204 (int)ring->size);
205 return -ENOMEM;
206 }
207
208 ring->base_addr = ALIGN(ring->base_addr_unaligned,
209 ring->base_align);
210 ring->descs = (u8 *)ring->descs_unaligned +
211 (ring->base_addr - ring->base_addr_unaligned);
212
213 vnic_dev_clear_desc_ring(ring);
214
215 ring->desc_avail = ring->desc_count - 1;
216
217 return 0;
218}
219
220void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
221{
222 if (ring->descs) {
223 pci_free_consistent(vdev->pdev,
224 ring->size_unaligned,
225 ring->descs_unaligned,
226 ring->base_addr_unaligned);
227 ring->descs = NULL;
228 }
229}
230
231int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
232 u64 *a0, u64 *a1, int wait)
233{
234 struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
235 int delay;
236 u32 status;
237 int dev_cmd_err[] = {
238 /* convert from fw's version of error.h to host's version */
239 0, /* ERR_SUCCESS */
240 EINVAL, /* ERR_EINVAL */
241 EFAULT, /* ERR_EFAULT */
242 EPERM, /* ERR_EPERM */
243 EBUSY, /* ERR_EBUSY */
244 };
245 int err;
246
247 status = ioread32(&devcmd->status);
248 if (status & STAT_BUSY) {
249 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
250 return -EBUSY;
251 }
252
253 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
254 writeq(*a0, &devcmd->args[0]);
255 writeq(*a1, &devcmd->args[1]);
256 wmb();
257 }
258
259 iowrite32(cmd, &devcmd->cmd);
260
261 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
262 return 0;
263
264 for (delay = 0; delay < wait; delay++) {
265
266 udelay(100);
267
268 status = ioread32(&devcmd->status);
269 if (!(status & STAT_BUSY)) {
270
271 if (status & STAT_ERROR) {
272 err = dev_cmd_err[(int)readq(&devcmd->args[0])];
273 printk(KERN_ERR "Error %d devcmd %d\n",
274 err, _CMD_N(cmd));
275 return -err;
276 }
277
278 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
279 rmb();
280 *a0 = readq(&devcmd->args[0]);
281 *a1 = readq(&devcmd->args[1]);
282 }
283
284 return 0;
285 }
286 }
287
288 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
289 return -ETIMEDOUT;
290}
291
292int vnic_dev_fw_info(struct vnic_dev *vdev,
293 struct vnic_devcmd_fw_info **fw_info)
294{
295 u64 a0, a1 = 0;
296 int wait = 1000;
297 int err = 0;
298
299 if (!vdev->fw_info) {
300 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
301 sizeof(struct vnic_devcmd_fw_info),
302 &vdev->fw_info_pa);
303 if (!vdev->fw_info)
304 return -ENOMEM;
305
306 a0 = vdev->fw_info_pa;
307
308 /* only get fw_info once and cache it */
309 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
310 }
311
312 *fw_info = vdev->fw_info;
313
314 return err;
315}
316
317int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
318 void *value)
319{
320 u64 a0, a1;
321 int wait = 1000;
322 int err;
323
324 a0 = offset;
325 a1 = size;
326
327 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
328
329 switch (size) {
330 case 1:
331 *(u8 *)value = (u8)a0;
332 break;
333 case 2:
334 *(u16 *)value = (u16)a0;
335 break;
336 case 4:
337 *(u32 *)value = (u32)a0;
338 break;
339 case 8:
340 *(u64 *)value = a0;
341 break;
342 default:
343 BUG();
344 break;
345 }
346
347 return err;
348}
349
350int vnic_dev_stats_clear(struct vnic_dev *vdev)
351{
352 u64 a0 = 0, a1 = 0;
353 int wait = 1000;
354 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
355}
356
357int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
358{
359 u64 a0, a1;
360 int wait = 1000;
361
362 if (!vdev->stats) {
363 vdev->stats = pci_alloc_consistent(vdev->pdev,
364 sizeof(struct vnic_stats), &vdev->stats_pa);
365 if (!vdev->stats)
366 return -ENOMEM;
367 }
368
369 *stats = vdev->stats;
370 a0 = vdev->stats_pa;
371 a1 = sizeof(struct vnic_stats);
372
373 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
374}
375
376int vnic_dev_close(struct vnic_dev *vdev)
377{
378 u64 a0 = 0, a1 = 0;
379 int wait = 1000;
380 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
381}
382
383int vnic_dev_enable(struct vnic_dev *vdev)
384{
385 u64 a0 = 0, a1 = 0;
386 int wait = 1000;
387 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
388}
389
390int vnic_dev_disable(struct vnic_dev *vdev)
391{
392 u64 a0 = 0, a1 = 0;
393 int wait = 1000;
394 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
395}
396
397int vnic_dev_open(struct vnic_dev *vdev, int arg)
398{
399 u64 a0 = (u32)arg, a1 = 0;
400 int wait = 1000;
401 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
402}
403
404int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
405{
406 u64 a0 = 0, a1 = 0;
407 int wait = 1000;
408 int err;
409
410 *done = 0;
411
412 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
413 if (err)
414 return err;
415
416 *done = (a0 == 0);
417
418 return 0;
419}
420
421int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
422{
423 u64 a0 = (u32)arg, a1 = 0;
424 int wait = 1000;
425 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
426}
427
428int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
429{
430 u64 a0 = 0, a1 = 0;
431 int wait = 1000;
432 int err;
433
434 *done = 0;
435
436 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
437 if (err)
438 return err;
439
440 *done = (a0 == 0);
441
442 return 0;
443}
444
445int vnic_dev_hang_notify(struct vnic_dev *vdev)
446{
447 u64 a0, a1;
448 int wait = 1000;
449 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
450}
451
452int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
453{
454 u64 a0, a1;
455 int wait = 1000;
456 int err, i;
457
458 for (i = 0; i < ETH_ALEN; i++)
459 mac_addr[i] = 0;
460
461 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
462 if (err)
463 return err;
464
465 for (i = 0; i < ETH_ALEN; i++)
466 mac_addr[i] = ((u8 *)&a0)[i];
467
468 return 0;
469}
470
471void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
472 int broadcast, int promisc, int allmulti)
473{
474 u64 a0, a1 = 0;
475 int wait = 1000;
476 int err;
477
478 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
479 (multicast ? CMD_PFILTER_MULTICAST : 0) |
480 (broadcast ? CMD_PFILTER_BROADCAST : 0) |
481 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
482 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
483
484 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
485 if (err)
486 printk(KERN_ERR "Can't set packet filter\n");
487}
488
489void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
490{
491 u64 a0 = 0, a1 = 0;
492 int wait = 1000;
493 int err;
494 int i;
495
496 for (i = 0; i < ETH_ALEN; i++)
497 ((u8 *)&a0)[i] = addr[i];
498
499 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
500 if (err)
501 printk(KERN_ERR
502 "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
503 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
504 err);
505}
506
507void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
508{
509 u64 a0 = 0, a1 = 0;
510 int wait = 1000;
511 int err;
512 int i;
513
514 for (i = 0; i < ETH_ALEN; i++)
515 ((u8 *)&a0)[i] = addr[i];
516
517 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
518 if (err)
519 printk(KERN_ERR
520 "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
521 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
522 err);
523}
524
525int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
526{
527 u64 a0, a1;
528 int wait = 1000;
529
530 if (!vdev->notify) {
531 vdev->notify = pci_alloc_consistent(vdev->pdev,
532 sizeof(struct vnic_devcmd_notify),
533 &vdev->notify_pa);
534 if (!vdev->notify)
535 return -ENOMEM;
536 }
537
538 a0 = vdev->notify_pa;
539 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
540 a1 += sizeof(struct vnic_devcmd_notify);
541
542 return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
543}
544
545void vnic_dev_notify_unset(struct vnic_dev *vdev)
546{
547 u64 a0, a1;
548 int wait = 1000;
549
550 a0 = 0; /* paddr = 0 to unset notify buffer */
551 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
552 a1 += sizeof(struct vnic_devcmd_notify);
553
554 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
555}
556
557static int vnic_dev_notify_ready(struct vnic_dev *vdev)
558{
559 u32 *words;
560 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
561 unsigned int i;
562 u32 csum;
563
564 if (!vdev->notify)
565 return 0;
566
567 do {
568 csum = 0;
569 memcpy(&vdev->notify_copy, vdev->notify,
570 sizeof(struct vnic_devcmd_notify));
571 words = (u32 *)&vdev->notify_copy;
572 for (i = 1; i < nwords; i++)
573 csum += words[i];
574 } while (csum != words[0]);
575
576 return 1;
577}
578
579int vnic_dev_init(struct vnic_dev *vdev, int arg)
580{
581 u64 a0 = (u32)arg, a1 = 0;
582 int wait = 1000;
583 return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
584}
585
586int vnic_dev_link_status(struct vnic_dev *vdev)
587{
588 if (vdev->linkstatus)
589 return *vdev->linkstatus;
590
591 if (!vnic_dev_notify_ready(vdev))
592 return 0;
593
594 return vdev->notify_copy.link_state;
595}
596
597u32 vnic_dev_port_speed(struct vnic_dev *vdev)
598{
599 if (!vnic_dev_notify_ready(vdev))
600 return 0;
601
602 return vdev->notify_copy.port_speed;
603}
604
605u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
606{
607 if (!vnic_dev_notify_ready(vdev))
608 return 0;
609
610 return vdev->notify_copy.msglvl;
611}
612
613u32 vnic_dev_mtu(struct vnic_dev *vdev)
614{
615 if (!vnic_dev_notify_ready(vdev))
616 return 0;
617
618 return vdev->notify_copy.mtu;
619}
620
621u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev)
622{
623 if (!vnic_dev_notify_ready(vdev))
624 return 0;
625
626 return vdev->notify_copy.link_down_cnt;
627}
628
629void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
630 enum vnic_dev_intr_mode intr_mode)
631{
632 vdev->intr_mode = intr_mode;
633}
634
635enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
636 struct vnic_dev *vdev)
637{
638 return vdev->intr_mode;
639}
640
641void vnic_dev_unregister(struct vnic_dev *vdev)
642{
643 if (vdev) {
644 if (vdev->notify)
645 pci_free_consistent(vdev->pdev,
646 sizeof(struct vnic_devcmd_notify),
647 vdev->notify,
648 vdev->notify_pa);
649 if (vdev->linkstatus)
650 pci_free_consistent(vdev->pdev,
651 sizeof(u32),
652 vdev->linkstatus,
653 vdev->linkstatus_pa);
654 if (vdev->stats)
655 pci_free_consistent(vdev->pdev,
656 sizeof(struct vnic_dev),
657 vdev->stats, vdev->stats_pa);
658 if (vdev->fw_info)
659 pci_free_consistent(vdev->pdev,
660 sizeof(struct vnic_devcmd_fw_info),
661 vdev->fw_info, vdev->fw_info_pa);
662 kfree(vdev);
663 }
664}
665
666struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
667 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
668{
669 if (!vdev) {
670 vdev = kzalloc(sizeof(struct vnic_dev), GFP_KERNEL);
671 if (!vdev)
672 return NULL;
673 }
674
675 vdev->priv = priv;
676 vdev->pdev = pdev;
677
678 if (vnic_dev_discover_res(vdev, bar))
679 goto err_out;
680
681 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
682 if (!vdev->devcmd)
683 goto err_out;
684
685 return vdev;
686
687err_out:
688 vnic_dev_unregister(vdev);
689 return NULL;
690}
diff --git a/drivers/scsi/fnic/vnic_dev.h b/drivers/scsi/fnic/vnic_dev.h
new file mode 100644
index 000000000000..f9935a8a5a09
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_dev.h
@@ -0,0 +1,161 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_DEV_H_
19#define _VNIC_DEV_H_
20
21#include "vnic_resource.h"
22#include "vnic_devcmd.h"
23
24/*
25 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
26 * Driver) when both are built with CONFIG options =y
27 */
28#define vnic_dev_priv fnic_dev_priv
29#define vnic_dev_get_res_count fnic_dev_get_res_count
30#define vnic_dev_get_res fnic_dev_get_res
31#define vnic_dev_desc_ring_size fnic_dev_desc_ring_siz
32#define vnic_dev_clear_desc_ring fnic_dev_clear_desc_ring
33#define vnic_dev_alloc_desc_ring fnic_dev_alloc_desc_ring
34#define vnic_dev_free_desc_ring fnic_dev_free_desc_ring
35#define vnic_dev_cmd fnic_dev_cmd
36#define vnic_dev_fw_info fnic_dev_fw_info
37#define vnic_dev_spec fnic_dev_spec
38#define vnic_dev_stats_clear fnic_dev_stats_clear
39#define vnic_dev_stats_dump fnic_dev_stats_dump
40#define vnic_dev_hang_notify fnic_dev_hang_notify
41#define vnic_dev_packet_filter fnic_dev_packet_filter
42#define vnic_dev_add_addr fnic_dev_add_addr
43#define vnic_dev_del_addr fnic_dev_del_addr
44#define vnic_dev_mac_addr fnic_dev_mac_addr
45#define vnic_dev_notify_set fnic_dev_notify_set
46#define vnic_dev_notify_unset fnic_dev_notify_unset
47#define vnic_dev_link_status fnic_dev_link_status
48#define vnic_dev_port_speed fnic_dev_port_speed
49#define vnic_dev_msg_lvl fnic_dev_msg_lvl
50#define vnic_dev_mtu fnic_dev_mtu
51#define vnic_dev_link_down_cnt fnic_dev_link_down_cnt
52#define vnic_dev_close fnic_dev_close
53#define vnic_dev_enable fnic_dev_enable
54#define vnic_dev_disable fnic_dev_disable
55#define vnic_dev_open fnic_dev_open
56#define vnic_dev_open_done fnic_dev_open_done
57#define vnic_dev_init fnic_dev_init
58#define vnic_dev_soft_reset fnic_dev_soft_reset
59#define vnic_dev_soft_reset_done fnic_dev_soft_reset_done
60#define vnic_dev_set_intr_mode fnic_dev_set_intr_mode
61#define vnic_dev_get_intr_mode fnic_dev_get_intr_mode
62#define vnic_dev_unregister fnic_dev_unregister
63#define vnic_dev_register fnic_dev_register
64
65#ifndef VNIC_PADDR_TARGET
66#define VNIC_PADDR_TARGET 0x0000000000000000ULL
67#endif
68
69#ifndef readq
70static inline u64 readq(void __iomem *reg)
71{
72 return ((u64)readl(reg + 0x4UL) << 32) | (u64)readl(reg);
73}
74
75static inline void writeq(u64 val, void __iomem *reg)
76{
77 writel(val & 0xffffffff, reg);
78 writel(val >> 32, reg + 0x4UL);
79}
80#endif
81
82enum vnic_dev_intr_mode {
83 VNIC_DEV_INTR_MODE_UNKNOWN,
84 VNIC_DEV_INTR_MODE_INTX,
85 VNIC_DEV_INTR_MODE_MSI,
86 VNIC_DEV_INTR_MODE_MSIX,
87};
88
89struct vnic_dev_bar {
90 void __iomem *vaddr;
91 dma_addr_t bus_addr;
92 unsigned long len;
93};
94
95struct vnic_dev_ring {
96 void *descs;
97 size_t size;
98 dma_addr_t base_addr;
99 size_t base_align;
100 void *descs_unaligned;
101 size_t size_unaligned;
102 dma_addr_t base_addr_unaligned;
103 unsigned int desc_size;
104 unsigned int desc_count;
105 unsigned int desc_avail;
106};
107
108struct vnic_dev;
109struct vnic_stats;
110
111void *vnic_dev_priv(struct vnic_dev *vdev);
112unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
113 enum vnic_res_type type);
114void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
115 unsigned int index);
116unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
117 unsigned int desc_count,
118 unsigned int desc_size);
119void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring);
120int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
121 unsigned int desc_count, unsigned int desc_size);
122void vnic_dev_free_desc_ring(struct vnic_dev *vdev,
123 struct vnic_dev_ring *ring);
124int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
125 u64 *a0, u64 *a1, int wait);
126int vnic_dev_fw_info(struct vnic_dev *vdev,
127 struct vnic_devcmd_fw_info **fw_info);
128int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset,
129 unsigned int size, void *value);
130int vnic_dev_stats_clear(struct vnic_dev *vdev);
131int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats);
132int vnic_dev_hang_notify(struct vnic_dev *vdev);
133void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
134 int broadcast, int promisc, int allmulti);
135void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr);
136void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr);
137int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr);
138int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr);
139void vnic_dev_notify_unset(struct vnic_dev *vdev);
140int vnic_dev_link_status(struct vnic_dev *vdev);
141u32 vnic_dev_port_speed(struct vnic_dev *vdev);
142u32 vnic_dev_msg_lvl(struct vnic_dev *vdev);
143u32 vnic_dev_mtu(struct vnic_dev *vdev);
144u32 vnic_dev_link_down_cnt(struct vnic_dev *vdev);
145int vnic_dev_close(struct vnic_dev *vdev);
146int vnic_dev_enable(struct vnic_dev *vdev);
147int vnic_dev_disable(struct vnic_dev *vdev);
148int vnic_dev_open(struct vnic_dev *vdev, int arg);
149int vnic_dev_open_done(struct vnic_dev *vdev, int *done);
150int vnic_dev_init(struct vnic_dev *vdev, int arg);
151int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg);
152int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done);
153void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
154 enum vnic_dev_intr_mode intr_mode);
155enum vnic_dev_intr_mode vnic_dev_get_intr_mode(struct vnic_dev *vdev);
156void vnic_dev_unregister(struct vnic_dev *vdev);
157struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
158 void *priv, struct pci_dev *pdev,
159 struct vnic_dev_bar *bar);
160
161#endif /* _VNIC_DEV_H_ */
diff --git a/drivers/scsi/fnic/vnic_devcmd.h b/drivers/scsi/fnic/vnic_devcmd.h
new file mode 100644
index 000000000000..d62b9061bf12
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_devcmd.h
@@ -0,0 +1,281 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_DEVCMD_H_
19#define _VNIC_DEVCMD_H_
20
21#define _CMD_NBITS 14
22#define _CMD_VTYPEBITS 10
23#define _CMD_FLAGSBITS 6
24#define _CMD_DIRBITS 2
25
26#define _CMD_NMASK ((1 << _CMD_NBITS)-1)
27#define _CMD_VTYPEMASK ((1 << _CMD_VTYPEBITS)-1)
28#define _CMD_FLAGSMASK ((1 << _CMD_FLAGSBITS)-1)
29#define _CMD_DIRMASK ((1 << _CMD_DIRBITS)-1)
30
31#define _CMD_NSHIFT 0
32#define _CMD_VTYPESHIFT (_CMD_NSHIFT+_CMD_NBITS)
33#define _CMD_FLAGSSHIFT (_CMD_VTYPESHIFT+_CMD_VTYPEBITS)
34#define _CMD_DIRSHIFT (_CMD_FLAGSSHIFT+_CMD_FLAGSBITS)
35
36/*
37 * Direction bits (from host perspective).
38 */
39#define _CMD_DIR_NONE 0U
40#define _CMD_DIR_WRITE 1U
41#define _CMD_DIR_READ 2U
42#define _CMD_DIR_RW (_CMD_DIR_WRITE | _CMD_DIR_READ)
43
44/*
45 * Flag bits.
46 */
47#define _CMD_FLAGS_NONE 0U
48#define _CMD_FLAGS_NOWAIT 1U
49
50/*
51 * vNIC type bits.
52 */
53#define _CMD_VTYPE_NONE 0U
54#define _CMD_VTYPE_ENET 1U
55#define _CMD_VTYPE_FC 2U
56#define _CMD_VTYPE_SCSI 4U
57#define _CMD_VTYPE_ALL (_CMD_VTYPE_ENET | _CMD_VTYPE_FC | _CMD_VTYPE_SCSI)
58
59/*
60 * Used to create cmds..
61*/
62#define _CMDCF(dir, flags, vtype, nr) \
63 (((dir) << _CMD_DIRSHIFT) | \
64 ((flags) << _CMD_FLAGSSHIFT) | \
65 ((vtype) << _CMD_VTYPESHIFT) | \
66 ((nr) << _CMD_NSHIFT))
67#define _CMDC(dir, vtype, nr) _CMDCF(dir, 0, vtype, nr)
68#define _CMDCNW(dir, vtype, nr) _CMDCF(dir, _CMD_FLAGS_NOWAIT, vtype, nr)
69
70/*
71 * Used to decode cmds..
72*/
73#define _CMD_DIR(cmd) (((cmd) >> _CMD_DIRSHIFT) & _CMD_DIRMASK)
74#define _CMD_FLAGS(cmd) (((cmd) >> _CMD_FLAGSSHIFT) & _CMD_FLAGSMASK)
75#define _CMD_VTYPE(cmd) (((cmd) >> _CMD_VTYPESHIFT) & _CMD_VTYPEMASK)
76#define _CMD_N(cmd) (((cmd) >> _CMD_NSHIFT) & _CMD_NMASK)
77
78enum vnic_devcmd_cmd {
79 CMD_NONE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_NONE, 0),
80
81 /* mcpu fw info in mem: (u64)a0=paddr to struct vnic_devcmd_fw_info */
82 CMD_MCPU_FW_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 1),
83
84 /* dev-specific block member:
85 * in: (u16)a0=offset,(u8)a1=size
86 * out: a0=value */
87 CMD_DEV_SPEC = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 2),
88
89 /* stats clear */
90 CMD_STATS_CLEAR = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 3),
91
92 /* stats dump in mem: (u64)a0=paddr to stats area,
93 * (u16)a1=sizeof stats area */
94 CMD_STATS_DUMP = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 4),
95
96 /* set Rx packet filter: (u32)a0=filters (see CMD_PFILTER_*) */
97 CMD_PACKET_FILTER = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 7),
98
99 /* hang detection notification */
100 CMD_HANG_NOTIFY = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 8),
101
102 /* MAC address in (u48)a0 */
103 CMD_MAC_ADDR = _CMDC(_CMD_DIR_READ,
104 _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 9),
105
106 /* disable/enable promisc mode: (u8)a0=0/1 */
107/***** XXX DEPRECATED *****/
108 CMD_PROMISC_MODE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 10),
109
110 /* disable/enable all-multi mode: (u8)a0=0/1 */
111/***** XXX DEPRECATED *****/
112 CMD_ALLMULTI_MODE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 11),
113
114 /* add addr from (u48)a0 */
115 CMD_ADDR_ADD = _CMDCNW(_CMD_DIR_WRITE,
116 _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 12),
117
118 /* del addr from (u48)a0 */
119 CMD_ADDR_DEL = _CMDCNW(_CMD_DIR_WRITE,
120 _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 13),
121
122 /* add VLAN id in (u16)a0 */
123 CMD_VLAN_ADD = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 14),
124
125 /* del VLAN id in (u16)a0 */
126 CMD_VLAN_DEL = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 15),
127
128 /* nic_cfg in (u32)a0 */
129 CMD_NIC_CFG = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
130
131 /* union vnic_rss_key in mem: (u64)a0=paddr, (u16)a1=len */
132 CMD_RSS_KEY = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 17),
133
134 /* union vnic_rss_cpu in mem: (u64)a0=paddr, (u16)a1=len */
135 CMD_RSS_CPU = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 18),
136
137 /* initiate softreset */
138 CMD_SOFT_RESET = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 19),
139
140 /* softreset status:
141 * out: a0=0 reset complete, a0=1 reset in progress */
142 CMD_SOFT_RESET_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 20),
143
144 /* set struct vnic_devcmd_notify buffer in mem:
145 * in:
146 * (u64)a0=paddr to notify (set paddr=0 to unset)
147 * (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
148 * (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
149 * out:
150 * (u32)a1 = effective size
151 */
152 CMD_NOTIFY = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21),
153
154 /* UNDI API: (u64)a0=paddr to s_PXENV_UNDI_ struct,
155 * (u8)a1=PXENV_UNDI_xxx */
156 CMD_UNDI = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 22),
157
158 /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */
159 CMD_OPEN = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23),
160
161 /* open status:
162 * out: a0=0 open complete, a0=1 open in progress */
163 CMD_OPEN_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24),
164
165 /* close vnic */
166 CMD_CLOSE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),
167
168 /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
169 CMD_INIT = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
170
171 /* variant of CMD_INIT, with provisioning info
172 * (u64)a0=paddr of vnic_devcmd_provinfo
173 * (u32)a1=sizeof provision info */
174 CMD_INIT_PROV_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 27),
175
176 /* enable virtual link */
177 CMD_ENABLE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),
178
179 /* disable virtual link */
180 CMD_DISABLE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29),
181
182 /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */
183 CMD_STATS_DUMP_ALL = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30),
184
185 /* init status:
186 * out: a0=0 init complete, a0=1 init in progress
187 * if a0=0, a1=errno */
188 CMD_INIT_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31),
189
190 /* INT13 API: (u64)a0=paddr to vnic_int13_params struct
191 * (u8)a1=INT13_CMD_xxx */
192 CMD_INT13 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_FC, 32),
193
194 /* logical uplink enable/disable: (u64)a0: 0/1=disable/enable */
195 CMD_LOGICAL_UPLINK = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 33),
196
197 /* undo initialize of virtual link */
198 CMD_DEINIT = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
199};
200
201/* flags for CMD_OPEN */
202#define CMD_OPENF_OPROM 0x1 /* open coming from option rom */
203
204/* flags for CMD_INIT */
205#define CMD_INITF_DEFAULT_MAC 0x1 /* init with default mac addr */
206
207/* flags for CMD_PACKET_FILTER */
208#define CMD_PFILTER_DIRECTED 0x01
209#define CMD_PFILTER_MULTICAST 0x02
210#define CMD_PFILTER_BROADCAST 0x04
211#define CMD_PFILTER_PROMISCUOUS 0x08
212#define CMD_PFILTER_ALL_MULTICAST 0x10
213
214enum vnic_devcmd_status {
215 STAT_NONE = 0,
216 STAT_BUSY = 1 << 0, /* cmd in progress */
217 STAT_ERROR = 1 << 1, /* last cmd caused error (code in a0) */
218};
219
220enum vnic_devcmd_error {
221 ERR_SUCCESS = 0,
222 ERR_EINVAL = 1,
223 ERR_EFAULT = 2,
224 ERR_EPERM = 3,
225 ERR_EBUSY = 4,
226 ERR_ECMDUNKNOWN = 5,
227 ERR_EBADSTATE = 6,
228 ERR_ENOMEM = 7,
229 ERR_ETIMEDOUT = 8,
230 ERR_ELINKDOWN = 9,
231};
232
233struct vnic_devcmd_fw_info {
234 char fw_version[32];
235 char fw_build[32];
236 char hw_version[32];
237 char hw_serial_number[32];
238};
239
240struct vnic_devcmd_notify {
241 u32 csum; /* checksum over following words */
242
243 u32 link_state; /* link up == 1 */
244 u32 port_speed; /* effective port speed (rate limit) */
245 u32 mtu; /* MTU */
246 u32 msglvl; /* requested driver msg lvl */
247 u32 uif; /* uplink interface */
248 u32 status; /* status bits (see VNIC_STF_*) */
249 u32 error; /* error code (see ERR_*) for first ERR */
250 u32 link_down_cnt; /* running count of link down transitions */
251};
252#define VNIC_STF_FATAL_ERR 0x0001 /* fatal fw error */
253
254struct vnic_devcmd_provinfo {
255 u8 oui[3];
256 u8 type;
257 u8 data[0];
258};
259
260/*
261 * Writing cmd register causes STAT_BUSY to get set in status register.
262 * When cmd completes, STAT_BUSY will be cleared.
263 *
264 * If cmd completed successfully STAT_ERROR will be clear
265 * and args registers contain cmd-specific results.
266 *
267 * If cmd error, STAT_ERROR will be set and args[0] contains error code.
268 *
269 * status register is read-only. While STAT_BUSY is set,
270 * all other register contents are read-only.
271 */
272
273/* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */
274#define VNIC_DEVCMD_NARGS 15
275struct vnic_devcmd {
276 u32 status; /* RO */
277 u32 cmd; /* RW */
278 u64 args[VNIC_DEVCMD_NARGS]; /* RW cmd args (little-endian) */
279};
280
281#endif /* _VNIC_DEVCMD_H_ */
diff --git a/drivers/scsi/fnic/vnic_intr.c b/drivers/scsi/fnic/vnic_intr.c
new file mode 100644
index 000000000000..4f4dc8793d23
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_intr.c
@@ -0,0 +1,60 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18
19#include <linux/kernel.h>
20#include <linux/errno.h>
21#include <linux/types.h>
22#include <linux/pci.h>
23#include <linux/delay.h>
24#include "vnic_dev.h"
25#include "vnic_intr.h"
26
27void vnic_intr_free(struct vnic_intr *intr)
28{
29 intr->ctrl = NULL;
30}
31
32int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
33 unsigned int index)
34{
35 intr->index = index;
36 intr->vdev = vdev;
37
38 intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
39 if (!intr->ctrl) {
40 printk(KERN_ERR "Failed to hook INTR[%d].ctrl resource\n",
41 index);
42 return -EINVAL;
43 }
44
45 return 0;
46}
47
48void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
49 unsigned int coalescing_type, unsigned int mask_on_assertion)
50{
51 iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
52 iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
53 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
54 iowrite32(0, &intr->ctrl->int_credits);
55}
56
57void vnic_intr_clean(struct vnic_intr *intr)
58{
59 iowrite32(0, &intr->ctrl->int_credits);
60}
diff --git a/drivers/scsi/fnic/vnic_intr.h b/drivers/scsi/fnic/vnic_intr.h
new file mode 100644
index 000000000000..d5fb40e7c98e
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_intr.h
@@ -0,0 +1,118 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_INTR_H_
19#define _VNIC_INTR_H_
20
21#include <linux/pci.h>
22#include "vnic_dev.h"
23
24/*
25 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
26 * Driver) when both are built with CONFIG options =y
27 */
28#define vnic_intr_unmask fnic_intr_unmask
29#define vnic_intr_mask fnic_intr_mask
30#define vnic_intr_return_credits fnic_intr_return_credits
31#define vnic_intr_credits fnic_intr_credits
32#define vnic_intr_return_all_credits fnic_intr_return_all_credits
33#define vnic_intr_legacy_pba fnic_intr_legacy_pba
34#define vnic_intr_free fnic_intr_free
35#define vnic_intr_alloc fnic_intr_alloc
36#define vnic_intr_init fnic_intr_init
37#define vnic_intr_clean fnic_intr_clean
38
39#define VNIC_INTR_TIMER_MAX 0xffff
40
41#define VNIC_INTR_TIMER_TYPE_ABS 0
42#define VNIC_INTR_TIMER_TYPE_QUIET 1
43
44/* Interrupt control */
45struct vnic_intr_ctrl {
46 u32 coalescing_timer; /* 0x00 */
47 u32 pad0;
48 u32 coalescing_value; /* 0x08 */
49 u32 pad1;
50 u32 coalescing_type; /* 0x10 */
51 u32 pad2;
52 u32 mask_on_assertion; /* 0x18 */
53 u32 pad3;
54 u32 mask; /* 0x20 */
55 u32 pad4;
56 u32 int_credits; /* 0x28 */
57 u32 pad5;
58 u32 int_credit_return; /* 0x30 */
59 u32 pad6;
60};
61
62struct vnic_intr {
63 unsigned int index;
64 struct vnic_dev *vdev;
65 struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */
66};
67
68static inline void vnic_intr_unmask(struct vnic_intr *intr)
69{
70 iowrite32(0, &intr->ctrl->mask);
71}
72
73static inline void vnic_intr_mask(struct vnic_intr *intr)
74{
75 iowrite32(1, &intr->ctrl->mask);
76}
77
78static inline void vnic_intr_return_credits(struct vnic_intr *intr,
79 unsigned int credits, int unmask, int reset_timer)
80{
81#define VNIC_INTR_UNMASK_SHIFT 16
82#define VNIC_INTR_RESET_TIMER_SHIFT 17
83
84 u32 int_credit_return = (credits & 0xffff) |
85 (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
86 (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
87
88 iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
89}
90
91static inline unsigned int vnic_intr_credits(struct vnic_intr *intr)
92{
93 return ioread32(&intr->ctrl->int_credits);
94}
95
96static inline void vnic_intr_return_all_credits(struct vnic_intr *intr)
97{
98 unsigned int credits = vnic_intr_credits(intr);
99 int unmask = 1;
100 int reset_timer = 1;
101
102 vnic_intr_return_credits(intr, credits, unmask, reset_timer);
103}
104
105static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
106{
107 /* read PBA without clearing */
108 return ioread32(legacy_pba);
109}
110
111void vnic_intr_free(struct vnic_intr *intr);
112int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
113 unsigned int index);
114void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
115 unsigned int coalescing_type, unsigned int mask_on_assertion);
116void vnic_intr_clean(struct vnic_intr *intr);
117
118#endif /* _VNIC_INTR_H_ */
diff --git a/drivers/scsi/fnic/vnic_nic.h b/drivers/scsi/fnic/vnic_nic.h
new file mode 100644
index 000000000000..f15b83eeaced
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_nic.h
@@ -0,0 +1,69 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_NIC_H_
19#define _VNIC_NIC_H_
20
21/*
22 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
23 * Driver) when both are built with CONFIG options =y
24 */
25#define vnic_set_nic_cfg fnic_set_nic_cfg
26
27#define NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD 0xffUL
28#define NIC_CFG_RSS_DEFAULT_CPU_SHIFT 0
29#define NIC_CFG_RSS_HASH_TYPE (0xffUL << 8)
30#define NIC_CFG_RSS_HASH_TYPE_MASK_FIELD 0xffUL
31#define NIC_CFG_RSS_HASH_TYPE_SHIFT 8
32#define NIC_CFG_RSS_HASH_BITS (7UL << 16)
33#define NIC_CFG_RSS_HASH_BITS_MASK_FIELD 7UL
34#define NIC_CFG_RSS_HASH_BITS_SHIFT 16
35#define NIC_CFG_RSS_BASE_CPU (7UL << 19)
36#define NIC_CFG_RSS_BASE_CPU_MASK_FIELD 7UL
37#define NIC_CFG_RSS_BASE_CPU_SHIFT 19
38#define NIC_CFG_RSS_ENABLE (1UL << 22)
39#define NIC_CFG_RSS_ENABLE_MASK_FIELD 1UL
40#define NIC_CFG_RSS_ENABLE_SHIFT 22
41#define NIC_CFG_TSO_IPID_SPLIT_EN (1UL << 23)
42#define NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD 1UL
43#define NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT 23
44#define NIC_CFG_IG_VLAN_STRIP_EN (1UL << 24)
45#define NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD 1UL
46#define NIC_CFG_IG_VLAN_STRIP_EN_SHIFT 24
47
48static inline void vnic_set_nic_cfg(u32 *nic_cfg,
49 u8 rss_default_cpu, u8 rss_hash_type,
50 u8 rss_hash_bits, u8 rss_base_cpu,
51 u8 rss_enable, u8 tso_ipid_split_en,
52 u8 ig_vlan_strip_en)
53{
54 *nic_cfg = (rss_default_cpu & NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD) |
55 ((rss_hash_type & NIC_CFG_RSS_HASH_TYPE_MASK_FIELD)
56 << NIC_CFG_RSS_HASH_TYPE_SHIFT) |
57 ((rss_hash_bits & NIC_CFG_RSS_HASH_BITS_MASK_FIELD)
58 << NIC_CFG_RSS_HASH_BITS_SHIFT) |
59 ((rss_base_cpu & NIC_CFG_RSS_BASE_CPU_MASK_FIELD)
60 << NIC_CFG_RSS_BASE_CPU_SHIFT) |
61 ((rss_enable & NIC_CFG_RSS_ENABLE_MASK_FIELD)
62 << NIC_CFG_RSS_ENABLE_SHIFT) |
63 ((tso_ipid_split_en & NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD)
64 << NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT) |
65 ((ig_vlan_strip_en & NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD)
66 << NIC_CFG_IG_VLAN_STRIP_EN_SHIFT);
67}
68
69#endif /* _VNIC_NIC_H_ */
diff --git a/drivers/scsi/fnic/vnic_resource.h b/drivers/scsi/fnic/vnic_resource.h
new file mode 100644
index 000000000000..2d842f79d41a
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_resource.h
@@ -0,0 +1,61 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_RESOURCE_H_
19#define _VNIC_RESOURCE_H_
20
21#define VNIC_RES_MAGIC 0x766E6963L /* 'vnic' */
22#define VNIC_RES_VERSION 0x00000000L
23
24/* vNIC resource types */
25enum vnic_res_type {
26 RES_TYPE_EOL, /* End-of-list */
27 RES_TYPE_WQ, /* Work queues */
28 RES_TYPE_RQ, /* Receive queues */
29 RES_TYPE_CQ, /* Completion queues */
30 RES_TYPE_RSVD1,
31 RES_TYPE_NIC_CFG, /* Enet NIC config registers */
32 RES_TYPE_RSVD2,
33 RES_TYPE_RSVD3,
34 RES_TYPE_RSVD4,
35 RES_TYPE_RSVD5,
36 RES_TYPE_INTR_CTRL, /* Interrupt ctrl table */
37 RES_TYPE_INTR_TABLE, /* MSI/MSI-X Interrupt table */
38 RES_TYPE_INTR_PBA, /* MSI/MSI-X PBA table */
39 RES_TYPE_INTR_PBA_LEGACY, /* Legacy intr status */
40 RES_TYPE_RSVD6,
41 RES_TYPE_RSVD7,
42 RES_TYPE_DEVCMD, /* Device command region */
43 RES_TYPE_PASS_THRU_PAGE, /* Pass-thru page */
44
45 RES_TYPE_MAX, /* Count of resource types */
46};
47
48struct vnic_resource_header {
49 u32 magic;
50 u32 version;
51};
52
53struct vnic_resource {
54 u8 type;
55 u8 bar;
56 u8 pad[2];
57 u32 bar_offset;
58 u32 count;
59};
60
61#endif /* _VNIC_RESOURCE_H_ */
diff --git a/drivers/scsi/fnic/vnic_rq.c b/drivers/scsi/fnic/vnic_rq.c
new file mode 100644
index 000000000000..bedd0d285630
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_rq.c
@@ -0,0 +1,196 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18
19#include <linux/errno.h>
20#include <linux/types.h>
21#include <linux/pci.h>
22#include <linux/delay.h>
23#include "vnic_dev.h"
24#include "vnic_rq.h"
25
26static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
27{
28 struct vnic_rq_buf *buf;
29 struct vnic_dev *vdev;
30 unsigned int i, j, count = rq->ring.desc_count;
31 unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count);
32
33 vdev = rq->vdev;
34
35 for (i = 0; i < blks; i++) {
36 rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ, GFP_ATOMIC);
37 if (!rq->bufs[i]) {
38 printk(KERN_ERR "Failed to alloc rq_bufs\n");
39 return -ENOMEM;
40 }
41 }
42
43 for (i = 0; i < blks; i++) {
44 buf = rq->bufs[i];
45 for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES; j++) {
46 buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES + j;
47 buf->desc = (u8 *)rq->ring.descs +
48 rq->ring.desc_size * buf->index;
49 if (buf->index + 1 == count) {
50 buf->next = rq->bufs[0];
51 break;
52 } else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES) {
53 buf->next = rq->bufs[i + 1];
54 } else {
55 buf->next = buf + 1;
56 buf++;
57 }
58 }
59 }
60
61 rq->to_use = rq->to_clean = rq->bufs[0];
62 rq->buf_index = 0;
63
64 return 0;
65}
66
67void vnic_rq_free(struct vnic_rq *rq)
68{
69 struct vnic_dev *vdev;
70 unsigned int i;
71
72 vdev = rq->vdev;
73
74 vnic_dev_free_desc_ring(vdev, &rq->ring);
75
76 for (i = 0; i < VNIC_RQ_BUF_BLKS_MAX; i++) {
77 kfree(rq->bufs[i]);
78 rq->bufs[i] = NULL;
79 }
80
81 rq->ctrl = NULL;
82}
83
84int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
85 unsigned int desc_count, unsigned int desc_size)
86{
87 int err;
88
89 rq->index = index;
90 rq->vdev = vdev;
91
92 rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
93 if (!rq->ctrl) {
94 printk(KERN_ERR "Failed to hook RQ[%d] resource\n", index);
95 return -EINVAL;
96 }
97
98 vnic_rq_disable(rq);
99
100 err = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size);
101 if (err)
102 return err;
103
104 err = vnic_rq_alloc_bufs(rq);
105 if (err) {
106 vnic_rq_free(rq);
107 return err;
108 }
109
110 return 0;
111}
112
113void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
114 unsigned int error_interrupt_enable,
115 unsigned int error_interrupt_offset)
116{
117 u64 paddr;
118 u32 fetch_index;
119
120 paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
121 writeq(paddr, &rq->ctrl->ring_base);
122 iowrite32(rq->ring.desc_count, &rq->ctrl->ring_size);
123 iowrite32(cq_index, &rq->ctrl->cq_index);
124 iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
125 iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
126 iowrite32(0, &rq->ctrl->dropped_packet_count);
127 iowrite32(0, &rq->ctrl->error_status);
128
129 /* Use current fetch_index as the ring starting point */
130 fetch_index = ioread32(&rq->ctrl->fetch_index);
131 rq->to_use = rq->to_clean =
132 &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
133 [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
134 iowrite32(fetch_index, &rq->ctrl->posted_index);
135
136 rq->buf_index = 0;
137}
138
139unsigned int vnic_rq_error_status(struct vnic_rq *rq)
140{
141 return ioread32(&rq->ctrl->error_status);
142}
143
144void vnic_rq_enable(struct vnic_rq *rq)
145{
146 iowrite32(1, &rq->ctrl->enable);
147}
148
149int vnic_rq_disable(struct vnic_rq *rq)
150{
151 unsigned int wait;
152
153 iowrite32(0, &rq->ctrl->enable);
154
155 /* Wait for HW to ACK disable request */
156 for (wait = 0; wait < 100; wait++) {
157 if (!(ioread32(&rq->ctrl->running)))
158 return 0;
159 udelay(1);
160 }
161
162 printk(KERN_ERR "Failed to disable RQ[%d]\n", rq->index);
163
164 return -ETIMEDOUT;
165}
166
167void vnic_rq_clean(struct vnic_rq *rq,
168 void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf))
169{
170 struct vnic_rq_buf *buf;
171 u32 fetch_index;
172
173 BUG_ON(ioread32(&rq->ctrl->enable));
174
175 buf = rq->to_clean;
176
177 while (vnic_rq_desc_used(rq) > 0) {
178
179 (*buf_clean)(rq, buf);
180
181 buf = rq->to_clean = buf->next;
182 rq->ring.desc_avail++;
183 }
184
185 /* Use current fetch_index as the ring starting point */
186 fetch_index = ioread32(&rq->ctrl->fetch_index);
187 rq->to_use = rq->to_clean =
188 &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
189 [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
190 iowrite32(fetch_index, &rq->ctrl->posted_index);
191
192 rq->buf_index = 0;
193
194 vnic_dev_clear_desc_ring(&rq->ring);
195}
196
diff --git a/drivers/scsi/fnic/vnic_rq.h b/drivers/scsi/fnic/vnic_rq.h
new file mode 100644
index 000000000000..aebdfbd6ad3c
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_rq.h
@@ -0,0 +1,235 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_RQ_H_
19#define _VNIC_RQ_H_
20
21#include <linux/pci.h>
22#include "vnic_dev.h"
23#include "vnic_cq.h"
24
25/*
26 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
27 * Driver) when both are built with CONFIG options =y
28 */
29#define vnic_rq_desc_avail fnic_rq_desc_avail
30#define vnic_rq_desc_used fnic_rq_desc_used
31#define vnic_rq_next_desc fnic_rq_next_desc
32#define vnic_rq_next_index fnic_rq_next_index
33#define vnic_rq_next_buf_index fnic_rq_next_buf_index
34#define vnic_rq_post fnic_rq_post
35#define vnic_rq_posting_soon fnic_rq_posting_soon
36#define vnic_rq_return_descs fnic_rq_return_descs
37#define vnic_rq_service fnic_rq_service
38#define vnic_rq_fill fnic_rq_fill
39#define vnic_rq_free fnic_rq_free
40#define vnic_rq_alloc fnic_rq_alloc
41#define vnic_rq_init fnic_rq_init
42#define vnic_rq_error_status fnic_rq_error_status
43#define vnic_rq_enable fnic_rq_enable
44#define vnic_rq_disable fnic_rq_disable
45#define vnic_rq_clean fnic_rq_clean
46
47/* Receive queue control */
48struct vnic_rq_ctrl {
49 u64 ring_base; /* 0x00 */
50 u32 ring_size; /* 0x08 */
51 u32 pad0;
52 u32 posted_index; /* 0x10 */
53 u32 pad1;
54 u32 cq_index; /* 0x18 */
55 u32 pad2;
56 u32 enable; /* 0x20 */
57 u32 pad3;
58 u32 running; /* 0x28 */
59 u32 pad4;
60 u32 fetch_index; /* 0x30 */
61 u32 pad5;
62 u32 error_interrupt_enable; /* 0x38 */
63 u32 pad6;
64 u32 error_interrupt_offset; /* 0x40 */
65 u32 pad7;
66 u32 error_status; /* 0x48 */
67 u32 pad8;
68 u32 dropped_packet_count; /* 0x50 */
69 u32 pad9;
70 u32 dropped_packet_count_rc; /* 0x58 */
71 u32 pad10;
72};
73
74/* Break the vnic_rq_buf allocations into blocks of 64 entries */
75#define VNIC_RQ_BUF_BLK_ENTRIES 64
76#define VNIC_RQ_BUF_BLK_SZ \
77 (VNIC_RQ_BUF_BLK_ENTRIES * sizeof(struct vnic_rq_buf))
78#define VNIC_RQ_BUF_BLKS_NEEDED(entries) \
79 DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES)
80#define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096)
81
82struct vnic_rq_buf {
83 struct vnic_rq_buf *next;
84 dma_addr_t dma_addr;
85 void *os_buf;
86 unsigned int os_buf_index;
87 unsigned int len;
88 unsigned int index;
89 void *desc;
90};
91
92struct vnic_rq {
93 unsigned int index;
94 struct vnic_dev *vdev;
95 struct vnic_rq_ctrl __iomem *ctrl; /* memory-mapped */
96 struct vnic_dev_ring ring;
97 struct vnic_rq_buf *bufs[VNIC_RQ_BUF_BLKS_MAX];
98 struct vnic_rq_buf *to_use;
99 struct vnic_rq_buf *to_clean;
100 void *os_buf_head;
101 unsigned int buf_index;
102 unsigned int pkts_outstanding;
103};
104
105static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
106{
107 /* how many does SW own? */
108 return rq->ring.desc_avail;
109}
110
111static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
112{
113 /* how many does HW own? */
114 return rq->ring.desc_count - rq->ring.desc_avail - 1;
115}
116
117static inline void *vnic_rq_next_desc(struct vnic_rq *rq)
118{
119 return rq->to_use->desc;
120}
121
122static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq)
123{
124 return rq->to_use->index;
125}
126
127static inline unsigned int vnic_rq_next_buf_index(struct vnic_rq *rq)
128{
129 return rq->buf_index++;
130}
131
132static inline void vnic_rq_post(struct vnic_rq *rq,
133 void *os_buf, unsigned int os_buf_index,
134 dma_addr_t dma_addr, unsigned int len)
135{
136 struct vnic_rq_buf *buf = rq->to_use;
137
138 buf->os_buf = os_buf;
139 buf->os_buf_index = os_buf_index;
140 buf->dma_addr = dma_addr;
141 buf->len = len;
142
143 buf = buf->next;
144 rq->to_use = buf;
145 rq->ring.desc_avail--;
146
147 /* Move the posted_index every nth descriptor
148 */
149
150#ifndef VNIC_RQ_RETURN_RATE
151#define VNIC_RQ_RETURN_RATE 0xf /* keep 2^n - 1 */
152#endif
153
154 if ((buf->index & VNIC_RQ_RETURN_RATE) == 0) {
155 /* Adding write memory barrier prevents compiler and/or CPU
156 * reordering, thus avoiding descriptor posting before
157 * descriptor is initialized. Otherwise, hardware can read
158 * stale descriptor fields.
159 */
160 wmb();
161 iowrite32(buf->index, &rq->ctrl->posted_index);
162 }
163}
164
165static inline int vnic_rq_posting_soon(struct vnic_rq *rq)
166{
167 return (rq->to_use->index & VNIC_RQ_RETURN_RATE) == 0;
168}
169
170static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count)
171{
172 rq->ring.desc_avail += count;
173}
174
175enum desc_return_options {
176 VNIC_RQ_RETURN_DESC,
177 VNIC_RQ_DEFER_RETURN_DESC,
178};
179
180static inline void vnic_rq_service(struct vnic_rq *rq,
181 struct cq_desc *cq_desc, u16 completed_index,
182 int desc_return, void (*buf_service)(struct vnic_rq *rq,
183 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
184 int skipped, void *opaque), void *opaque)
185{
186 struct vnic_rq_buf *buf;
187 int skipped;
188
189 buf = rq->to_clean;
190 while (1) {
191
192 skipped = (buf->index != completed_index);
193
194 (*buf_service)(rq, cq_desc, buf, skipped, opaque);
195
196 if (desc_return == VNIC_RQ_RETURN_DESC)
197 rq->ring.desc_avail++;
198
199 rq->to_clean = buf->next;
200
201 if (!skipped)
202 break;
203
204 buf = rq->to_clean;
205 }
206}
207
208static inline int vnic_rq_fill(struct vnic_rq *rq,
209 int (*buf_fill)(struct vnic_rq *rq))
210{
211 int err;
212
213 while (vnic_rq_desc_avail(rq) > 1) {
214
215 err = (*buf_fill)(rq);
216 if (err)
217 return err;
218 }
219
220 return 0;
221}
222
223void vnic_rq_free(struct vnic_rq *rq);
224int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
225 unsigned int desc_count, unsigned int desc_size);
226void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
227 unsigned int error_interrupt_enable,
228 unsigned int error_interrupt_offset);
229unsigned int vnic_rq_error_status(struct vnic_rq *rq);
230void vnic_rq_enable(struct vnic_rq *rq);
231int vnic_rq_disable(struct vnic_rq *rq);
232void vnic_rq_clean(struct vnic_rq *rq,
233 void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf));
234
235#endif /* _VNIC_RQ_H_ */
diff --git a/drivers/scsi/fnic/vnic_scsi.h b/drivers/scsi/fnic/vnic_scsi.h
new file mode 100644
index 000000000000..46baa5254001
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_scsi.h
@@ -0,0 +1,99 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_SCSI_H_
19#define _VNIC_SCSI_H_
20
21#define VNIC_FNIC_WQ_COPY_COUNT_MIN 1
22#define VNIC_FNIC_WQ_COPY_COUNT_MAX 1
23
24#define VNIC_FNIC_WQ_DESCS_MIN 64
25#define VNIC_FNIC_WQ_DESCS_MAX 128
26
27#define VNIC_FNIC_WQ_COPY_DESCS_MIN 64
28#define VNIC_FNIC_WQ_COPY_DESCS_MAX 512
29
30#define VNIC_FNIC_RQ_DESCS_MIN 64
31#define VNIC_FNIC_RQ_DESCS_MAX 128
32
33#define VNIC_FNIC_EDTOV_MIN 1000
34#define VNIC_FNIC_EDTOV_MAX 255000
35#define VNIC_FNIC_EDTOV_DEF 2000
36
37#define VNIC_FNIC_RATOV_MIN 1000
38#define VNIC_FNIC_RATOV_MAX 255000
39
40#define VNIC_FNIC_MAXDATAFIELDSIZE_MIN 256
41#define VNIC_FNIC_MAXDATAFIELDSIZE_MAX 2112
42
43#define VNIC_FNIC_FLOGI_RETRIES_MIN 0
44#define VNIC_FNIC_FLOGI_RETRIES_MAX 0xffffffff
45#define VNIC_FNIC_FLOGI_RETRIES_DEF 0xffffffff
46
47#define VNIC_FNIC_FLOGI_TIMEOUT_MIN 1000
48#define VNIC_FNIC_FLOGI_TIMEOUT_MAX 255000
49
50#define VNIC_FNIC_PLOGI_RETRIES_MIN 0
51#define VNIC_FNIC_PLOGI_RETRIES_MAX 255
52#define VNIC_FNIC_PLOGI_RETRIES_DEF 8
53
54#define VNIC_FNIC_PLOGI_TIMEOUT_MIN 1000
55#define VNIC_FNIC_PLOGI_TIMEOUT_MAX 255000
56
57#define VNIC_FNIC_IO_THROTTLE_COUNT_MIN 256
58#define VNIC_FNIC_IO_THROTTLE_COUNT_MAX 4096
59
60#define VNIC_FNIC_LINK_DOWN_TIMEOUT_MIN 0
61#define VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX 240000
62
63#define VNIC_FNIC_PORT_DOWN_TIMEOUT_MIN 0
64#define VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX 240000
65
66#define VNIC_FNIC_PORT_DOWN_IO_RETRIES_MIN 0
67#define VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX 255
68
69#define VNIC_FNIC_LUNS_PER_TARGET_MIN 1
70#define VNIC_FNIC_LUNS_PER_TARGET_MAX 1024
71
72/* Device-specific region: scsi configuration */
73struct vnic_fc_config {
74 u64 node_wwn;
75 u64 port_wwn;
76 u32 flags;
77 u32 wq_enet_desc_count;
78 u32 wq_copy_desc_count;
79 u32 rq_desc_count;
80 u32 flogi_retries;
81 u32 flogi_timeout;
82 u32 plogi_retries;
83 u32 plogi_timeout;
84 u32 io_throttle_count;
85 u32 link_down_timeout;
86 u32 port_down_timeout;
87 u32 port_down_io_retries;
88 u32 luns_per_tgt;
89 u16 maxdatafieldsize;
90 u16 ed_tov;
91 u16 ra_tov;
92 u16 intr_timer;
93 u8 intr_timer_type;
94};
95
96#define VFCF_FCP_SEQ_LVL_ERR 0x1 /* Enable FCP-2 Error Recovery */
97#define VFCF_PERBI 0x2 /* persistent binding info available */
98
99#endif /* _VNIC_SCSI_H_ */
diff --git a/drivers/scsi/fnic/vnic_stats.h b/drivers/scsi/fnic/vnic_stats.h
new file mode 100644
index 000000000000..5372e23c1cb3
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_stats.h
@@ -0,0 +1,68 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_STATS_H_
19#define _VNIC_STATS_H_
20
21/* Tx statistics */
22struct vnic_tx_stats {
23 u64 tx_frames_ok;
24 u64 tx_unicast_frames_ok;
25 u64 tx_multicast_frames_ok;
26 u64 tx_broadcast_frames_ok;
27 u64 tx_bytes_ok;
28 u64 tx_unicast_bytes_ok;
29 u64 tx_multicast_bytes_ok;
30 u64 tx_broadcast_bytes_ok;
31 u64 tx_drops;
32 u64 tx_errors;
33 u64 tx_tso;
34 u64 rsvd[16];
35};
36
37/* Rx statistics */
38struct vnic_rx_stats {
39 u64 rx_frames_ok;
40 u64 rx_frames_total;
41 u64 rx_unicast_frames_ok;
42 u64 rx_multicast_frames_ok;
43 u64 rx_broadcast_frames_ok;
44 u64 rx_bytes_ok;
45 u64 rx_unicast_bytes_ok;
46 u64 rx_multicast_bytes_ok;
47 u64 rx_broadcast_bytes_ok;
48 u64 rx_drop;
49 u64 rx_no_bufs;
50 u64 rx_errors;
51 u64 rx_rss;
52 u64 rx_crc_errors;
53 u64 rx_frames_64;
54 u64 rx_frames_127;
55 u64 rx_frames_255;
56 u64 rx_frames_511;
57 u64 rx_frames_1023;
58 u64 rx_frames_1518;
59 u64 rx_frames_to_max;
60 u64 rsvd[16];
61};
62
63struct vnic_stats {
64 struct vnic_tx_stats tx;
65 struct vnic_rx_stats rx;
66};
67
68#endif /* _VNIC_STATS_H_ */
diff --git a/drivers/scsi/fnic/vnic_wq.c b/drivers/scsi/fnic/vnic_wq.c
new file mode 100644
index 000000000000..1f9ea790d130
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_wq.c
@@ -0,0 +1,182 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18
19#include <linux/errno.h>
20#include <linux/types.h>
21#include <linux/pci.h>
22#include <linux/delay.h>
23#include "vnic_dev.h"
24#include "vnic_wq.h"
25
26static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
27{
28 struct vnic_wq_buf *buf;
29 struct vnic_dev *vdev;
30 unsigned int i, j, count = wq->ring.desc_count;
31 unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
32
33 vdev = wq->vdev;
34
35 for (i = 0; i < blks; i++) {
36 wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC);
37 if (!wq->bufs[i]) {
38 printk(KERN_ERR "Failed to alloc wq_bufs\n");
39 return -ENOMEM;
40 }
41 }
42
43 for (i = 0; i < blks; i++) {
44 buf = wq->bufs[i];
45 for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES; j++) {
46 buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES + j;
47 buf->desc = (u8 *)wq->ring.descs +
48 wq->ring.desc_size * buf->index;
49 if (buf->index + 1 == count) {
50 buf->next = wq->bufs[0];
51 break;
52 } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES) {
53 buf->next = wq->bufs[i + 1];
54 } else {
55 buf->next = buf + 1;
56 buf++;
57 }
58 }
59 }
60
61 wq->to_use = wq->to_clean = wq->bufs[0];
62
63 return 0;
64}
65
66void vnic_wq_free(struct vnic_wq *wq)
67{
68 struct vnic_dev *vdev;
69 unsigned int i;
70
71 vdev = wq->vdev;
72
73 vnic_dev_free_desc_ring(vdev, &wq->ring);
74
75 for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
76 kfree(wq->bufs[i]);
77 wq->bufs[i] = NULL;
78 }
79
80 wq->ctrl = NULL;
81
82}
83
84int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
85 unsigned int desc_count, unsigned int desc_size)
86{
87 int err;
88
89 wq->index = index;
90 wq->vdev = vdev;
91
92 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
93 if (!wq->ctrl) {
94 printk(KERN_ERR "Failed to hook WQ[%d] resource\n", index);
95 return -EINVAL;
96 }
97
98 vnic_wq_disable(wq);
99
100 err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
101 if (err)
102 return err;
103
104 err = vnic_wq_alloc_bufs(wq);
105 if (err) {
106 vnic_wq_free(wq);
107 return err;
108 }
109
110 return 0;
111}
112
113void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
114 unsigned int error_interrupt_enable,
115 unsigned int error_interrupt_offset)
116{
117 u64 paddr;
118
119 paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
120 writeq(paddr, &wq->ctrl->ring_base);
121 iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
122 iowrite32(0, &wq->ctrl->fetch_index);
123 iowrite32(0, &wq->ctrl->posted_index);
124 iowrite32(cq_index, &wq->ctrl->cq_index);
125 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
126 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
127 iowrite32(0, &wq->ctrl->error_status);
128}
129
130unsigned int vnic_wq_error_status(struct vnic_wq *wq)
131{
132 return ioread32(&wq->ctrl->error_status);
133}
134
135void vnic_wq_enable(struct vnic_wq *wq)
136{
137 iowrite32(1, &wq->ctrl->enable);
138}
139
140int vnic_wq_disable(struct vnic_wq *wq)
141{
142 unsigned int wait;
143
144 iowrite32(0, &wq->ctrl->enable);
145
146 /* Wait for HW to ACK disable request */
147 for (wait = 0; wait < 100; wait++) {
148 if (!(ioread32(&wq->ctrl->running)))
149 return 0;
150 udelay(1);
151 }
152
153 printk(KERN_ERR "Failed to disable WQ[%d]\n", wq->index);
154
155 return -ETIMEDOUT;
156}
157
158void vnic_wq_clean(struct vnic_wq *wq,
159 void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
160{
161 struct vnic_wq_buf *buf;
162
163 BUG_ON(ioread32(&wq->ctrl->enable));
164
165 buf = wq->to_clean;
166
167 while (vnic_wq_desc_used(wq) > 0) {
168
169 (*buf_clean)(wq, buf);
170
171 buf = wq->to_clean = buf->next;
172 wq->ring.desc_avail++;
173 }
174
175 wq->to_use = wq->to_clean = wq->bufs[0];
176
177 iowrite32(0, &wq->ctrl->fetch_index);
178 iowrite32(0, &wq->ctrl->posted_index);
179 iowrite32(0, &wq->ctrl->error_status);
180
181 vnic_dev_clear_desc_ring(&wq->ring);
182}
diff --git a/drivers/scsi/fnic/vnic_wq.h b/drivers/scsi/fnic/vnic_wq.h
new file mode 100644
index 000000000000..5cd094f79281
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_wq.h
@@ -0,0 +1,175 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_WQ_H_
19#define _VNIC_WQ_H_
20
21#include <linux/pci.h>
22#include "vnic_dev.h"
23#include "vnic_cq.h"
24
25/*
26 * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
27 * Driver) when both are built with CONFIG options =y
28 */
29#define vnic_wq_desc_avail fnic_wq_desc_avail
30#define vnic_wq_desc_used fnic_wq_desc_used
31#define vnic_wq_next_desc fni_cwq_next_desc
32#define vnic_wq_post fnic_wq_post
33#define vnic_wq_service fnic_wq_service
34#define vnic_wq_free fnic_wq_free
35#define vnic_wq_alloc fnic_wq_alloc
36#define vnic_wq_init fnic_wq_init
37#define vnic_wq_error_status fnic_wq_error_status
38#define vnic_wq_enable fnic_wq_enable
39#define vnic_wq_disable fnic_wq_disable
40#define vnic_wq_clean fnic_wq_clean
41
42/* Work queue control */
43struct vnic_wq_ctrl {
44 u64 ring_base; /* 0x00 */
45 u32 ring_size; /* 0x08 */
46 u32 pad0;
47 u32 posted_index; /* 0x10 */
48 u32 pad1;
49 u32 cq_index; /* 0x18 */
50 u32 pad2;
51 u32 enable; /* 0x20 */
52 u32 pad3;
53 u32 running; /* 0x28 */
54 u32 pad4;
55 u32 fetch_index; /* 0x30 */
56 u32 pad5;
57 u32 dca_value; /* 0x38 */
58 u32 pad6;
59 u32 error_interrupt_enable; /* 0x40 */
60 u32 pad7;
61 u32 error_interrupt_offset; /* 0x48 */
62 u32 pad8;
63 u32 error_status; /* 0x50 */
64 u32 pad9;
65};
66
67struct vnic_wq_buf {
68 struct vnic_wq_buf *next;
69 dma_addr_t dma_addr;
70 void *os_buf;
71 unsigned int len;
72 unsigned int index;
73 int sop;
74 void *desc;
75};
76
77/* Break the vnic_wq_buf allocations into blocks of 64 entries */
78#define VNIC_WQ_BUF_BLK_ENTRIES 64
79#define VNIC_WQ_BUF_BLK_SZ \
80 (VNIC_WQ_BUF_BLK_ENTRIES * sizeof(struct vnic_wq_buf))
81#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \
82 DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES)
83#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096)
84
85struct vnic_wq {
86 unsigned int index;
87 struct vnic_dev *vdev;
88 struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */
89 struct vnic_dev_ring ring;
90 struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX];
91 struct vnic_wq_buf *to_use;
92 struct vnic_wq_buf *to_clean;
93 unsigned int pkts_outstanding;
94};
95
96static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq)
97{
98 /* how many does SW own? */
99 return wq->ring.desc_avail;
100}
101
102static inline unsigned int vnic_wq_desc_used(struct vnic_wq *wq)
103{
104 /* how many does HW own? */
105 return wq->ring.desc_count - wq->ring.desc_avail - 1;
106}
107
108static inline void *vnic_wq_next_desc(struct vnic_wq *wq)
109{
110 return wq->to_use->desc;
111}
112
113static inline void vnic_wq_post(struct vnic_wq *wq,
114 void *os_buf, dma_addr_t dma_addr,
115 unsigned int len, int sop, int eop)
116{
117 struct vnic_wq_buf *buf = wq->to_use;
118
119 buf->sop = sop;
120 buf->os_buf = eop ? os_buf : NULL;
121 buf->dma_addr = dma_addr;
122 buf->len = len;
123
124 buf = buf->next;
125 if (eop) {
126 /* Adding write memory barrier prevents compiler and/or CPU
127 * reordering, thus avoiding descriptor posting before
128 * descriptor is initialized. Otherwise, hardware can read
129 * stale descriptor fields.
130 */
131 wmb();
132 iowrite32(buf->index, &wq->ctrl->posted_index);
133 }
134 wq->to_use = buf;
135
136 wq->ring.desc_avail--;
137}
138
139static inline void vnic_wq_service(struct vnic_wq *wq,
140 struct cq_desc *cq_desc, u16 completed_index,
141 void (*buf_service)(struct vnic_wq *wq,
142 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque),
143 void *opaque)
144{
145 struct vnic_wq_buf *buf;
146
147 buf = wq->to_clean;
148 while (1) {
149
150 (*buf_service)(wq, cq_desc, buf, opaque);
151
152 wq->ring.desc_avail++;
153
154 wq->to_clean = buf->next;
155
156 if (buf->index == completed_index)
157 break;
158
159 buf = wq->to_clean;
160 }
161}
162
163void vnic_wq_free(struct vnic_wq *wq);
164int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
165 unsigned int desc_count, unsigned int desc_size);
166void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
167 unsigned int error_interrupt_enable,
168 unsigned int error_interrupt_offset);
169unsigned int vnic_wq_error_status(struct vnic_wq *wq);
170void vnic_wq_enable(struct vnic_wq *wq);
171int vnic_wq_disable(struct vnic_wq *wq);
172void vnic_wq_clean(struct vnic_wq *wq,
173 void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf));
174
175#endif /* _VNIC_WQ_H_ */
diff --git a/drivers/scsi/fnic/vnic_wq_copy.c b/drivers/scsi/fnic/vnic_wq_copy.c
new file mode 100644
index 000000000000..9eab7e7caf38
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_wq_copy.c
@@ -0,0 +1,117 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18
19#include <linux/errno.h>
20#include <linux/types.h>
21#include <linux/pci.h>
22#include <linux/delay.h>
23#include "vnic_wq_copy.h"
24
25void vnic_wq_copy_enable(struct vnic_wq_copy *wq)
26{
27 iowrite32(1, &wq->ctrl->enable);
28}
29
30int vnic_wq_copy_disable(struct vnic_wq_copy *wq)
31{
32 unsigned int wait;
33
34 iowrite32(0, &wq->ctrl->enable);
35
36 /* Wait for HW to ACK disable request */
37 for (wait = 0; wait < 100; wait++) {
38 if (!(ioread32(&wq->ctrl->running)))
39 return 0;
40 udelay(1);
41 }
42
43 printk(KERN_ERR "Failed to disable Copy WQ[%d],"
44 " fetch index=%d, posted_index=%d\n",
45 wq->index, ioread32(&wq->ctrl->fetch_index),
46 ioread32(&wq->ctrl->posted_index));
47
48 return -ENODEV;
49}
50
51void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
52 void (*q_clean)(struct vnic_wq_copy *wq,
53 struct fcpio_host_req *wq_desc))
54{
55 BUG_ON(ioread32(&wq->ctrl->enable));
56
57 if (vnic_wq_copy_desc_in_use(wq))
58 vnic_wq_copy_service(wq, -1, q_clean);
59
60 wq->to_use_index = wq->to_clean_index = 0;
61
62 iowrite32(0, &wq->ctrl->fetch_index);
63 iowrite32(0, &wq->ctrl->posted_index);
64 iowrite32(0, &wq->ctrl->error_status);
65
66 vnic_dev_clear_desc_ring(&wq->ring);
67}
68
69void vnic_wq_copy_free(struct vnic_wq_copy *wq)
70{
71 struct vnic_dev *vdev;
72
73 vdev = wq->vdev;
74 vnic_dev_free_desc_ring(vdev, &wq->ring);
75 wq->ctrl = NULL;
76}
77
78int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
79 unsigned int index, unsigned int desc_count,
80 unsigned int desc_size)
81{
82 int err;
83
84 wq->index = index;
85 wq->vdev = vdev;
86 wq->to_use_index = wq->to_clean_index = 0;
87 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
88 if (!wq->ctrl) {
89 printk(KERN_ERR "Failed to hook COPY WQ[%d] resource\n", index);
90 return -EINVAL;
91 }
92
93 vnic_wq_copy_disable(wq);
94
95 err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
96 if (err)
97 return err;
98
99 return 0;
100}
101
102void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
103 unsigned int error_interrupt_enable,
104 unsigned int error_interrupt_offset)
105{
106 u64 paddr;
107
108 paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
109 writeq(paddr, &wq->ctrl->ring_base);
110 iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
111 iowrite32(0, &wq->ctrl->fetch_index);
112 iowrite32(0, &wq->ctrl->posted_index);
113 iowrite32(cq_index, &wq->ctrl->cq_index);
114 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
115 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
116}
117
diff --git a/drivers/scsi/fnic/vnic_wq_copy.h b/drivers/scsi/fnic/vnic_wq_copy.h
new file mode 100644
index 000000000000..6aff9740c3df
--- /dev/null
+++ b/drivers/scsi/fnic/vnic_wq_copy.h
@@ -0,0 +1,128 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _VNIC_WQ_COPY_H_
19#define _VNIC_WQ_COPY_H_
20
21#include <linux/pci.h>
22#include "vnic_wq.h"
23#include "fcpio.h"
24
25#define VNIC_WQ_COPY_MAX 1
26
27struct vnic_wq_copy {
28 unsigned int index;
29 struct vnic_dev *vdev;
30 struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */
31 struct vnic_dev_ring ring;
32 unsigned to_use_index;
33 unsigned to_clean_index;
34};
35
36static inline unsigned int vnic_wq_copy_desc_avail(struct vnic_wq_copy *wq)
37{
38 return wq->ring.desc_avail;
39}
40
41static inline unsigned int vnic_wq_copy_desc_in_use(struct vnic_wq_copy *wq)
42{
43 return wq->ring.desc_count - 1 - wq->ring.desc_avail;
44}
45
46static inline void *vnic_wq_copy_next_desc(struct vnic_wq_copy *wq)
47{
48 struct fcpio_host_req *desc = wq->ring.descs;
49 return &desc[wq->to_use_index];
50}
51
52static inline void vnic_wq_copy_post(struct vnic_wq_copy *wq)
53{
54
55 ((wq->to_use_index + 1) == wq->ring.desc_count) ?
56 (wq->to_use_index = 0) : (wq->to_use_index++);
57 wq->ring.desc_avail--;
58
59 /* Adding write memory barrier prevents compiler and/or CPU
60 * reordering, thus avoiding descriptor posting before
61 * descriptor is initialized. Otherwise, hardware can read
62 * stale descriptor fields.
63 */
64 wmb();
65
66 iowrite32(wq->to_use_index, &wq->ctrl->posted_index);
67}
68
69static inline void vnic_wq_copy_desc_process(struct vnic_wq_copy *wq, u16 index)
70{
71 unsigned int cnt;
72
73 if (wq->to_clean_index <= index)
74 cnt = (index - wq->to_clean_index) + 1;
75 else
76 cnt = wq->ring.desc_count - wq->to_clean_index + index + 1;
77
78 wq->to_clean_index = ((index + 1) % wq->ring.desc_count);
79 wq->ring.desc_avail += cnt;
80
81}
82
83static inline void vnic_wq_copy_service(struct vnic_wq_copy *wq,
84 u16 completed_index,
85 void (*q_service)(struct vnic_wq_copy *wq,
86 struct fcpio_host_req *wq_desc))
87{
88 struct fcpio_host_req *wq_desc = wq->ring.descs;
89 unsigned int curr_index;
90
91 while (1) {
92
93 if (q_service)
94 (*q_service)(wq, &wq_desc[wq->to_clean_index]);
95
96 wq->ring.desc_avail++;
97
98 curr_index = wq->to_clean_index;
99
100 /* increment the to-clean index so that we start
101 * with an unprocessed index next time we enter the loop
102 */
103 ((wq->to_clean_index + 1) == wq->ring.desc_count) ?
104 (wq->to_clean_index = 0) : (wq->to_clean_index++);
105
106 if (curr_index == completed_index)
107 break;
108
109 /* we have cleaned all the entries */
110 if ((completed_index == (u16)-1) &&
111 (wq->to_clean_index == wq->to_use_index))
112 break;
113 }
114}
115
116void vnic_wq_copy_enable(struct vnic_wq_copy *wq);
117int vnic_wq_copy_disable(struct vnic_wq_copy *wq);
118void vnic_wq_copy_free(struct vnic_wq_copy *wq);
119int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
120 unsigned int index, unsigned int desc_count, unsigned int desc_size);
121void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
122 unsigned int error_interrupt_enable,
123 unsigned int error_interrupt_offset);
124void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
125 void (*q_clean)(struct vnic_wq_copy *wq,
126 struct fcpio_host_req *wq_desc));
127
128#endif /* _VNIC_WQ_COPY_H_ */
diff --git a/drivers/scsi/fnic/wq_enet_desc.h b/drivers/scsi/fnic/wq_enet_desc.h
new file mode 100644
index 000000000000..b121cbad18b8
--- /dev/null
+++ b/drivers/scsi/fnic/wq_enet_desc.h
@@ -0,0 +1,96 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 */
18#ifndef _WQ_ENET_DESC_H_
19#define _WQ_ENET_DESC_H_
20
21/* Ethernet work queue descriptor: 16B */
22struct wq_enet_desc {
23 __le64 address;
24 __le16 length;
25 __le16 mss_loopback;
26 __le16 header_length_flags;
27 __le16 vlan_tag;
28};
29
30#define WQ_ENET_ADDR_BITS 64
31#define WQ_ENET_LEN_BITS 14
32#define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
33#define WQ_ENET_MSS_BITS 14
34#define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
35#define WQ_ENET_MSS_SHIFT 2
36#define WQ_ENET_LOOPBACK_SHIFT 1
37#define WQ_ENET_HDRLEN_BITS 10
38#define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
39#define WQ_ENET_FLAGS_OM_BITS 2
40#define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
41#define WQ_ENET_FLAGS_EOP_SHIFT 12
42#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
43#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
44#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
45
46#define WQ_ENET_OFFLOAD_MODE_CSUM 0
47#define WQ_ENET_OFFLOAD_MODE_RESERVED 1
48#define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
49#define WQ_ENET_OFFLOAD_MODE_TSO 3
50
51static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
52 u64 address, u16 length, u16 mss, u16 header_length,
53 u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
54 u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
55{
56 desc->address = cpu_to_le64(address);
57 desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
58 desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
59 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
60 desc->header_length_flags = cpu_to_le16(
61 (header_length & WQ_ENET_HDRLEN_MASK) |
62 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
63 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
64 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
65 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
66 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
67 desc->vlan_tag = cpu_to_le16(vlan_tag);
68}
69
70static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
71 u64 *address, u16 *length, u16 *mss, u16 *header_length,
72 u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
73 u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
74{
75 *address = le64_to_cpu(desc->address);
76 *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
77 *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
78 WQ_ENET_MSS_MASK;
79 *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
80 WQ_ENET_LOOPBACK_SHIFT) & 1);
81 *header_length = le16_to_cpu(desc->header_length_flags) &
82 WQ_ENET_HDRLEN_MASK;
83 *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
84 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
85 *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
86 WQ_ENET_FLAGS_EOP_SHIFT) & 1);
87 *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
88 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
89 *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
90 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
91 *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
92 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
93 *vlan_tag = le16_to_cpu(desc->vlan_tag);
94}
95
96#endif /* _WQ_ENET_DESC_H_ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-05 16:00:33 -0500