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authorScott Feldman <scofeldm@cisco.com>2008-09-15 12:17:11 -0400
committerJeff Garzik <jgarzik@redhat.com>2008-09-18 11:34:53 -0400
commit01f2e4ead2c51226ed1283ef6a8388ca6f4cff8f (patch)
treeb1cc2ef1a191a3bf00f371d5dbc2028e1fee01c5 /drivers/net/enic
parent452c1ce218a68b5dbd626397ecfc65ca89dd3cbb (diff)
enic: add Cisco 10G Ethernet NIC driver
Signed-off-by: Scott Feldman <scofeldm@cisco.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/net/enic')
-rw-r--r--drivers/net/enic/Makefile5
-rw-r--r--drivers/net/enic/cq_desc.h79
-rw-r--r--drivers/net/enic/cq_enet_desc.h169
-rw-r--r--drivers/net/enic/enic.h115
-rw-r--r--drivers/net/enic/enic_main.c1949
-rw-r--r--drivers/net/enic/enic_res.c370
-rw-r--r--drivers/net/enic/enic_res.h151
-rw-r--r--drivers/net/enic/rq_enet_desc.h60
-rw-r--r--drivers/net/enic/vnic_cq.c89
-rw-r--r--drivers/net/enic/vnic_cq.h113
-rw-r--r--drivers/net/enic/vnic_dev.c674
-rw-r--r--drivers/net/enic/vnic_dev.h106
-rw-r--r--drivers/net/enic/vnic_devcmd.h282
-rw-r--r--drivers/net/enic/vnic_enet.h47
-rw-r--r--drivers/net/enic/vnic_intr.c62
-rw-r--r--drivers/net/enic/vnic_intr.h92
-rw-r--r--drivers/net/enic/vnic_nic.h65
-rw-r--r--drivers/net/enic/vnic_resource.h63
-rw-r--r--drivers/net/enic/vnic_rq.c199
-rw-r--r--drivers/net/enic/vnic_rq.h204
-rw-r--r--drivers/net/enic/vnic_rss.h32
-rw-r--r--drivers/net/enic/vnic_stats.h70
-rw-r--r--drivers/net/enic/vnic_wq.c184
-rw-r--r--drivers/net/enic/vnic_wq.h154
-rw-r--r--drivers/net/enic/wq_enet_desc.h98
25 files changed, 5432 insertions, 0 deletions
diff --git a/drivers/net/enic/Makefile b/drivers/net/enic/Makefile
new file mode 100644
index 000000000000..391c3bce5b79
--- /dev/null
+++ b/drivers/net/enic/Makefile
@@ -0,0 +1,5 @@
1obj-$(CONFIG_ENIC) := enic.o
2
3enic-y := enic_main.o vnic_cq.o vnic_intr.o vnic_wq.o \
4 enic_res.o vnic_dev.o vnic_rq.o
5
diff --git a/drivers/net/enic/cq_desc.h b/drivers/net/enic/cq_desc.h
new file mode 100644
index 000000000000..c036a8bfd043
--- /dev/null
+++ b/drivers/net/enic/cq_desc.h
@@ -0,0 +1,79 @@
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
20#ifndef _CQ_DESC_H_
21#define _CQ_DESC_H_
22
23/*
24 * Completion queue descriptor types
25 */
26enum cq_desc_types {
27 CQ_DESC_TYPE_WQ_ENET = 0,
28 CQ_DESC_TYPE_DESC_COPY = 1,
29 CQ_DESC_TYPE_WQ_EXCH = 2,
30 CQ_DESC_TYPE_RQ_ENET = 3,
31 CQ_DESC_TYPE_RQ_FCP = 4,
32};
33
34/* Completion queue descriptor: 16B
35 *
36 * All completion queues have this basic layout. The
37 * type_specfic area is unique for each completion
38 * queue type.
39 */
40struct cq_desc {
41 __le16 completed_index;
42 __le16 q_number;
43 u8 type_specfic[11];
44 u8 type_color;
45};
46
47#define CQ_DESC_TYPE_BITS 7
48#define CQ_DESC_TYPE_MASK ((1 << CQ_DESC_TYPE_BITS) - 1)
49#define CQ_DESC_COLOR_MASK 1
50#define CQ_DESC_Q_NUM_BITS 10
51#define CQ_DESC_Q_NUM_MASK ((1 << CQ_DESC_Q_NUM_BITS) - 1)
52#define CQ_DESC_COMP_NDX_BITS 12
53#define CQ_DESC_COMP_NDX_MASK ((1 << CQ_DESC_COMP_NDX_BITS) - 1)
54
55static inline void cq_desc_dec(const struct cq_desc *desc_arg,
56 u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
57{
58 const struct cq_desc *desc = desc_arg;
59 const u8 type_color = desc->type_color;
60
61 *color = (type_color >> CQ_DESC_TYPE_BITS) & CQ_DESC_COLOR_MASK;
62
63 /*
64 * Make sure color bit is read from desc *before* other fields
65 * are read from desc. Hardware guarantees color bit is last
66 * bit (byte) written. Adding the rmb() prevents the compiler
67 * and/or CPU from reordering the reads which would potentially
68 * result in reading stale values.
69 */
70
71 rmb();
72
73 *type = type_color & CQ_DESC_TYPE_MASK;
74 *q_number = le16_to_cpu(desc->q_number) & CQ_DESC_Q_NUM_MASK;
75 *completed_index = le16_to_cpu(desc->completed_index) &
76 CQ_DESC_COMP_NDX_MASK;
77}
78
79#endif /* _CQ_DESC_H_ */
diff --git a/drivers/net/enic/cq_enet_desc.h b/drivers/net/enic/cq_enet_desc.h
new file mode 100644
index 000000000000..03dce9ed612c
--- /dev/null
+++ b/drivers/net/enic/cq_enet_desc.h
@@ -0,0 +1,169 @@
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
20#ifndef _CQ_ENET_DESC_H_
21#define _CQ_ENET_DESC_H_
22
23#include "cq_desc.h"
24
25/* Ethernet completion queue descriptor: 16B */
26struct cq_enet_wq_desc {
27 __le16 completed_index;
28 __le16 q_number;
29 u8 reserved[11];
30 u8 type_color;
31};
32
33static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc,
34 u8 *type, u8 *color, u16 *q_number, u16 *completed_index)
35{
36 cq_desc_dec((struct cq_desc *)desc, type,
37 color, q_number, completed_index);
38}
39
40/* Completion queue descriptor: Ethernet receive queue, 16B */
41struct cq_enet_rq_desc {
42 __le16 completed_index_flags;
43 __le16 q_number_rss_type_flags;
44 __le32 rss_hash;
45 __le16 bytes_written_flags;
46 __le16 vlan;
47 __le16 checksum_fcoe;
48 u8 flags;
49 u8 type_color;
50};
51
52#define CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT (0x1 << 12)
53#define CQ_ENET_RQ_DESC_FLAGS_FCOE (0x1 << 13)
54#define CQ_ENET_RQ_DESC_FLAGS_EOP (0x1 << 14)
55#define CQ_ENET_RQ_DESC_FLAGS_SOP (0x1 << 15)
56
57#define CQ_ENET_RQ_DESC_RSS_TYPE_BITS 4
58#define CQ_ENET_RQ_DESC_RSS_TYPE_MASK \
59 ((1 << CQ_ENET_RQ_DESC_RSS_TYPE_BITS) - 1)
60#define CQ_ENET_RQ_DESC_RSS_TYPE_NONE 0
61#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv4 1
62#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4 2
63#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6 3
64#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6 4
65#define CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX 5
66#define CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX 6
67
68#define CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC (0x1 << 14)
69
70#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS 14
71#define CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK \
72 ((1 << CQ_ENET_RQ_DESC_BYTES_WRITTEN_BITS) - 1)
73#define CQ_ENET_RQ_DESC_FLAGS_TRUNCATED (0x1 << 14)
74#define CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED (0x1 << 15)
75
76#define CQ_ENET_RQ_DESC_FCOE_SOF_BITS 4
77#define CQ_ENET_RQ_DESC_FCOE_SOF_MASK \
78 ((1 << CQ_ENET_RQ_DESC_FCOE_SOF_BITS) - 1)
79#define CQ_ENET_RQ_DESC_FCOE_EOF_BITS 8
80#define CQ_ENET_RQ_DESC_FCOE_EOF_MASK \
81 ((1 << CQ_ENET_RQ_DESC_FCOE_EOF_BITS) - 1)
82#define CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT 8
83
84#define CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK (0x1 << 0)
85#define CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK (0x1 << 0)
86#define CQ_ENET_RQ_DESC_FLAGS_UDP (0x1 << 1)
87#define CQ_ENET_RQ_DESC_FCOE_ENC_ERROR (0x1 << 1)
88#define CQ_ENET_RQ_DESC_FLAGS_TCP (0x1 << 2)
89#define CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK (0x1 << 3)
90#define CQ_ENET_RQ_DESC_FLAGS_IPV6 (0x1 << 4)
91#define CQ_ENET_RQ_DESC_FLAGS_IPV4 (0x1 << 5)
92#define CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT (0x1 << 6)
93#define CQ_ENET_RQ_DESC_FLAGS_FCS_OK (0x1 << 7)
94
95static inline void cq_enet_rq_desc_dec(struct cq_enet_rq_desc *desc,
96 u8 *type, u8 *color, u16 *q_number, u16 *completed_index,
97 u8 *ingress_port, u8 *fcoe, u8 *eop, u8 *sop, u8 *rss_type,
98 u8 *csum_not_calc, u32 *rss_hash, u16 *bytes_written, u8 *packet_error,
99 u8 *vlan_stripped, u16 *vlan, u16 *checksum, u8 *fcoe_sof,
100 u8 *fcoe_fc_crc_ok, u8 *fcoe_enc_error, u8 *fcoe_eof,
101 u8 *tcp_udp_csum_ok, u8 *udp, u8 *tcp, u8 *ipv4_csum_ok,
102 u8 *ipv6, u8 *ipv4, u8 *ipv4_fragment, u8 *fcs_ok)
103{
104 u16 completed_index_flags = le16_to_cpu(desc->completed_index_flags);
105 u16 q_number_rss_type_flags =
106 le16_to_cpu(desc->q_number_rss_type_flags);
107 u16 bytes_written_flags = le16_to_cpu(desc->bytes_written_flags);
108
109 cq_desc_dec((struct cq_desc *)desc, type,
110 color, q_number, completed_index);
111
112 *ingress_port = (completed_index_flags &
113 CQ_ENET_RQ_DESC_FLAGS_INGRESS_PORT) ? 1 : 0;
114 *fcoe = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_FCOE) ?
115 1 : 0;
116 *eop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_EOP) ?
117 1 : 0;
118 *sop = (completed_index_flags & CQ_ENET_RQ_DESC_FLAGS_SOP) ?
119 1 : 0;
120
121 *rss_type = (u8)((q_number_rss_type_flags >> CQ_DESC_Q_NUM_BITS) &
122 CQ_ENET_RQ_DESC_RSS_TYPE_MASK);
123 *csum_not_calc = (q_number_rss_type_flags &
124 CQ_ENET_RQ_DESC_FLAGS_CSUM_NOT_CALC) ? 1 : 0;
125
126 *rss_hash = le32_to_cpu(desc->rss_hash);
127
128 *bytes_written = bytes_written_flags &
129 CQ_ENET_RQ_DESC_BYTES_WRITTEN_MASK;
130 *packet_error = (bytes_written_flags &
131 CQ_ENET_RQ_DESC_FLAGS_TRUNCATED) ? 1 : 0;
132 *vlan_stripped = (bytes_written_flags &
133 CQ_ENET_RQ_DESC_FLAGS_VLAN_STRIPPED) ? 1 : 0;
134
135 *vlan = le16_to_cpu(desc->vlan);
136
137 if (*fcoe) {
138 *fcoe_sof = (u8)(le16_to_cpu(desc->checksum_fcoe) &
139 CQ_ENET_RQ_DESC_FCOE_SOF_MASK);
140 *fcoe_fc_crc_ok = (desc->flags &
141 CQ_ENET_RQ_DESC_FCOE_FC_CRC_OK) ? 1 : 0;
142 *fcoe_enc_error = (desc->flags &
143 CQ_ENET_RQ_DESC_FCOE_ENC_ERROR) ? 1 : 0;
144 *fcoe_eof = (u8)((desc->checksum_fcoe >>
145 CQ_ENET_RQ_DESC_FCOE_EOF_SHIFT) &
146 CQ_ENET_RQ_DESC_FCOE_EOF_MASK);
147 *checksum = 0;
148 } else {
149 *fcoe_sof = 0;
150 *fcoe_fc_crc_ok = 0;
151 *fcoe_enc_error = 0;
152 *fcoe_eof = 0;
153 *checksum = le16_to_cpu(desc->checksum_fcoe);
154 }
155
156 *tcp_udp_csum_ok =
157 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP_UDP_CSUM_OK) ? 1 : 0;
158 *udp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_UDP) ? 1 : 0;
159 *tcp = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_TCP) ? 1 : 0;
160 *ipv4_csum_ok =
161 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_CSUM_OK) ? 1 : 0;
162 *ipv6 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV6) ? 1 : 0;
163 *ipv4 = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4) ? 1 : 0;
164 *ipv4_fragment =
165 (desc->flags & CQ_ENET_RQ_DESC_FLAGS_IPV4_FRAGMENT) ? 1 : 0;
166 *fcs_ok = (desc->flags & CQ_ENET_RQ_DESC_FLAGS_FCS_OK) ? 1 : 0;
167}
168
169#endif /* _CQ_ENET_DESC_H_ */
diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h
new file mode 100644
index 000000000000..fb83c926da58
--- /dev/null
+++ b/drivers/net/enic/enic.h
@@ -0,0 +1,115 @@
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
20#ifndef _ENIC_H_
21#define _ENIC_H_
22
23#include <linux/inet_lro.h>
24
25#include "vnic_enet.h"
26#include "vnic_dev.h"
27#include "vnic_wq.h"
28#include "vnic_rq.h"
29#include "vnic_cq.h"
30#include "vnic_intr.h"
31#include "vnic_stats.h"
32#include "vnic_rss.h"
33
34#define DRV_NAME "enic"
35#define DRV_DESCRIPTION "Cisco 10G Ethernet Driver"
36#define DRV_VERSION "0.0.1.18163.472"
37#define DRV_COPYRIGHT "Copyright 2008 Cisco Systems, Inc"
38#define PFX DRV_NAME ": "
39
40#define ENIC_LRO_MAX_DESC 8
41#define ENIC_LRO_MAX_AGGR 64
42
43enum enic_cq_index {
44 ENIC_CQ_RQ,
45 ENIC_CQ_WQ,
46 ENIC_CQ_MAX,
47};
48
49enum enic_intx_intr_index {
50 ENIC_INTX_WQ_RQ,
51 ENIC_INTX_ERR,
52 ENIC_INTX_NOTIFY,
53 ENIC_INTX_MAX,
54};
55
56enum enic_msix_intr_index {
57 ENIC_MSIX_RQ,
58 ENIC_MSIX_WQ,
59 ENIC_MSIX_ERR,
60 ENIC_MSIX_NOTIFY,
61 ENIC_MSIX_MAX,
62};
63
64struct enic_msix_entry {
65 int requested;
66 char devname[IFNAMSIZ];
67 irqreturn_t (*isr)(int, void *);
68 void *devid;
69};
70
71/* Per-instance private data structure */
72struct enic {
73 struct net_device *netdev;
74 struct pci_dev *pdev;
75 struct vnic_enet_config config;
76 struct vnic_dev_bar bar0;
77 struct vnic_dev *vdev;
78 struct net_device_stats net_stats;
79 struct timer_list notify_timer;
80 struct work_struct reset;
81 struct msix_entry msix_entry[ENIC_MSIX_MAX];
82 struct enic_msix_entry msix[ENIC_MSIX_MAX];
83 u32 msg_enable;
84 spinlock_t devcmd_lock;
85 u8 mac_addr[ETH_ALEN];
86 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
87 unsigned int mc_count;
88 int csum_rx_enabled;
89 u32 port_mtu;
90
91 /* work queue cache line section */
92 ____cacheline_aligned struct vnic_wq wq[1];
93 spinlock_t wq_lock[1];
94 unsigned int wq_count;
95 struct vlan_group *vlan_group;
96
97 /* receive queue cache line section */
98 ____cacheline_aligned struct vnic_rq rq[1];
99 unsigned int rq_count;
100 int (*rq_alloc_buf)(struct vnic_rq *rq);
101 struct napi_struct napi;
102 struct net_lro_mgr lro_mgr;
103 struct net_lro_desc lro_desc[ENIC_LRO_MAX_DESC];
104
105 /* interrupt resource cache line section */
106 ____cacheline_aligned struct vnic_intr intr[ENIC_MSIX_MAX];
107 unsigned int intr_count;
108 u32 __iomem *legacy_pba; /* memory-mapped */
109
110 /* completion queue cache line section */
111 ____cacheline_aligned struct vnic_cq cq[ENIC_CQ_MAX];
112 unsigned int cq_count;
113};
114
115#endif /* _ENIC_H_ */
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
new file mode 100644
index 000000000000..4cf5ec76c993
--- /dev/null
+++ b/drivers/net/enic/enic_main.c
@@ -0,0 +1,1949 @@
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
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/string.h>
23#include <linux/errno.h>
24#include <linux/types.h>
25#include <linux/init.h>
26#include <linux/workqueue.h>
27#include <linux/pci.h>
28#include <linux/netdevice.h>
29#include <linux/etherdevice.h>
30#include <linux/if_ether.h>
31#include <linux/if_vlan.h>
32#include <linux/ethtool.h>
33#include <linux/in.h>
34#include <linux/ip.h>
35#include <linux/ipv6.h>
36#include <linux/tcp.h>
37
38#include "cq_enet_desc.h"
39#include "vnic_dev.h"
40#include "vnic_intr.h"
41#include "vnic_stats.h"
42#include "enic_res.h"
43#include "enic.h"
44
45#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
46#define ENIC_JUMBO_FIRST_BUF_SIZE 256
47
48/* Supported devices */
49static struct pci_device_id enic_id_table[] = {
50 { PCI_VDEVICE(CISCO, 0x0043) },
51 { 0, } /* end of table */
52};
53
54MODULE_DESCRIPTION(DRV_DESCRIPTION);
55MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
56MODULE_LICENSE("GPL");
57MODULE_VERSION(DRV_VERSION);
58MODULE_DEVICE_TABLE(pci, enic_id_table);
59
60struct enic_stat {
61 char name[ETH_GSTRING_LEN];
62 unsigned int offset;
63};
64
65#define ENIC_TX_STAT(stat) \
66 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
67#define ENIC_RX_STAT(stat) \
68 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
69
70static const struct enic_stat enic_tx_stats[] = {
71 ENIC_TX_STAT(tx_frames_ok),
72 ENIC_TX_STAT(tx_unicast_frames_ok),
73 ENIC_TX_STAT(tx_multicast_frames_ok),
74 ENIC_TX_STAT(tx_broadcast_frames_ok),
75 ENIC_TX_STAT(tx_bytes_ok),
76 ENIC_TX_STAT(tx_unicast_bytes_ok),
77 ENIC_TX_STAT(tx_multicast_bytes_ok),
78 ENIC_TX_STAT(tx_broadcast_bytes_ok),
79 ENIC_TX_STAT(tx_drops),
80 ENIC_TX_STAT(tx_errors),
81 ENIC_TX_STAT(tx_tso),
82};
83
84static const struct enic_stat enic_rx_stats[] = {
85 ENIC_RX_STAT(rx_frames_ok),
86 ENIC_RX_STAT(rx_frames_total),
87 ENIC_RX_STAT(rx_unicast_frames_ok),
88 ENIC_RX_STAT(rx_multicast_frames_ok),
89 ENIC_RX_STAT(rx_broadcast_frames_ok),
90 ENIC_RX_STAT(rx_bytes_ok),
91 ENIC_RX_STAT(rx_unicast_bytes_ok),
92 ENIC_RX_STAT(rx_multicast_bytes_ok),
93 ENIC_RX_STAT(rx_broadcast_bytes_ok),
94 ENIC_RX_STAT(rx_drop),
95 ENIC_RX_STAT(rx_no_bufs),
96 ENIC_RX_STAT(rx_errors),
97 ENIC_RX_STAT(rx_rss),
98 ENIC_RX_STAT(rx_crc_errors),
99 ENIC_RX_STAT(rx_frames_64),
100 ENIC_RX_STAT(rx_frames_127),
101 ENIC_RX_STAT(rx_frames_255),
102 ENIC_RX_STAT(rx_frames_511),
103 ENIC_RX_STAT(rx_frames_1023),
104 ENIC_RX_STAT(rx_frames_1518),
105 ENIC_RX_STAT(rx_frames_to_max),
106};
107
108static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
109static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
110
111static int enic_get_settings(struct net_device *netdev,
112 struct ethtool_cmd *ecmd)
113{
114 struct enic *enic = netdev_priv(netdev);
115
116 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
117 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
118 ecmd->port = PORT_FIBRE;
119 ecmd->transceiver = XCVR_EXTERNAL;
120
121 if (netif_carrier_ok(netdev)) {
122 ecmd->speed = vnic_dev_port_speed(enic->vdev);
123 ecmd->duplex = DUPLEX_FULL;
124 } else {
125 ecmd->speed = -1;
126 ecmd->duplex = -1;
127 }
128
129 ecmd->autoneg = AUTONEG_DISABLE;
130
131 return 0;
132}
133
134static void enic_get_drvinfo(struct net_device *netdev,
135 struct ethtool_drvinfo *drvinfo)
136{
137 struct enic *enic = netdev_priv(netdev);
138 struct vnic_devcmd_fw_info *fw_info;
139
140 spin_lock(&enic->devcmd_lock);
141 vnic_dev_fw_info(enic->vdev, &fw_info);
142 spin_unlock(&enic->devcmd_lock);
143
144 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
145 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
146 strncpy(drvinfo->fw_version, fw_info->fw_version,
147 sizeof(drvinfo->fw_version));
148 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
149 sizeof(drvinfo->bus_info));
150}
151
152static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
153{
154 unsigned int i;
155
156 switch (stringset) {
157 case ETH_SS_STATS:
158 for (i = 0; i < enic_n_tx_stats; i++) {
159 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
160 data += ETH_GSTRING_LEN;
161 }
162 for (i = 0; i < enic_n_rx_stats; i++) {
163 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
164 data += ETH_GSTRING_LEN;
165 }
166 break;
167 }
168}
169
170static int enic_get_stats_count(struct net_device *netdev)
171{
172 return enic_n_tx_stats + enic_n_rx_stats;
173}
174
175static void enic_get_ethtool_stats(struct net_device *netdev,
176 struct ethtool_stats *stats, u64 *data)
177{
178 struct enic *enic = netdev_priv(netdev);
179 struct vnic_stats *vstats;
180 unsigned int i;
181
182 spin_lock(&enic->devcmd_lock);
183 vnic_dev_stats_dump(enic->vdev, &vstats);
184 spin_unlock(&enic->devcmd_lock);
185
186 for (i = 0; i < enic_n_tx_stats; i++)
187 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
188 for (i = 0; i < enic_n_rx_stats; i++)
189 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
190}
191
192static u32 enic_get_rx_csum(struct net_device *netdev)
193{
194 struct enic *enic = netdev_priv(netdev);
195 return enic->csum_rx_enabled;
196}
197
198static int enic_set_rx_csum(struct net_device *netdev, u32 data)
199{
200 struct enic *enic = netdev_priv(netdev);
201
202 enic->csum_rx_enabled =
203 (data && ENIC_SETTING(enic, RXCSUM)) ? 1 : 0;
204
205 return 0;
206}
207
208static int enic_set_tx_csum(struct net_device *netdev, u32 data)
209{
210 struct enic *enic = netdev_priv(netdev);
211
212 if (data && ENIC_SETTING(enic, TXCSUM))
213 netdev->features |= NETIF_F_HW_CSUM;
214 else
215 netdev->features &= ~NETIF_F_HW_CSUM;
216
217 return 0;
218}
219
220static int enic_set_tso(struct net_device *netdev, u32 data)
221{
222 struct enic *enic = netdev_priv(netdev);
223
224 if (data && ENIC_SETTING(enic, TSO))
225 netdev->features |=
226 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
227 else
228 netdev->features &=
229 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
230
231 return 0;
232}
233
234static u32 enic_get_msglevel(struct net_device *netdev)
235{
236 struct enic *enic = netdev_priv(netdev);
237 return enic->msg_enable;
238}
239
240static void enic_set_msglevel(struct net_device *netdev, u32 value)
241{
242 struct enic *enic = netdev_priv(netdev);
243 enic->msg_enable = value;
244}
245
246static struct ethtool_ops enic_ethtool_ops = {
247 .get_settings = enic_get_settings,
248 .get_drvinfo = enic_get_drvinfo,
249 .get_msglevel = enic_get_msglevel,
250 .set_msglevel = enic_set_msglevel,
251 .get_link = ethtool_op_get_link,
252 .get_strings = enic_get_strings,
253 .get_stats_count = enic_get_stats_count,
254 .get_ethtool_stats = enic_get_ethtool_stats,
255 .get_rx_csum = enic_get_rx_csum,
256 .set_rx_csum = enic_set_rx_csum,
257 .get_tx_csum = ethtool_op_get_tx_csum,
258 .set_tx_csum = enic_set_tx_csum,
259 .get_sg = ethtool_op_get_sg,
260 .set_sg = ethtool_op_set_sg,
261 .get_tso = ethtool_op_get_tso,
262 .set_tso = enic_set_tso,
263};
264
265static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
266{
267 struct enic *enic = vnic_dev_priv(wq->vdev);
268
269 if (buf->sop)
270 pci_unmap_single(enic->pdev, buf->dma_addr,
271 buf->len, PCI_DMA_TODEVICE);
272 else
273 pci_unmap_page(enic->pdev, buf->dma_addr,
274 buf->len, PCI_DMA_TODEVICE);
275
276 if (buf->os_buf)
277 dev_kfree_skb_any(buf->os_buf);
278}
279
280static void enic_wq_free_buf(struct vnic_wq *wq,
281 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
282{
283 enic_free_wq_buf(wq, buf);
284}
285
286static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
287 u8 type, u16 q_number, u16 completed_index, void *opaque)
288{
289 struct enic *enic = vnic_dev_priv(vdev);
290
291 spin_lock(&enic->wq_lock[q_number]);
292
293 vnic_wq_service(&enic->wq[q_number], cq_desc,
294 completed_index, enic_wq_free_buf,
295 opaque);
296
297 if (netif_queue_stopped(enic->netdev) &&
298 vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1)
299 netif_wake_queue(enic->netdev);
300
301 spin_unlock(&enic->wq_lock[q_number]);
302
303 return 0;
304}
305
306static void enic_log_q_error(struct enic *enic)
307{
308 unsigned int i;
309 u32 error_status;
310
311 for (i = 0; i < enic->wq_count; i++) {
312 error_status = vnic_wq_error_status(&enic->wq[i]);
313 if (error_status)
314 printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
315 enic->netdev->name, i, error_status);
316 }
317
318 for (i = 0; i < enic->rq_count; i++) {
319 error_status = vnic_rq_error_status(&enic->rq[i]);
320 if (error_status)
321 printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
322 enic->netdev->name, i, error_status);
323 }
324}
325
326static void enic_link_check(struct enic *enic)
327{
328 int link_status = vnic_dev_link_status(enic->vdev);
329 int carrier_ok = netif_carrier_ok(enic->netdev);
330
331 if (link_status && !carrier_ok) {
332 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
333 netif_carrier_on(enic->netdev);
334 } else if (!link_status && carrier_ok) {
335 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
336 netif_carrier_off(enic->netdev);
337 }
338}
339
340static void enic_mtu_check(struct enic *enic)
341{
342 u32 mtu = vnic_dev_mtu(enic->vdev);
343
344 if (mtu != enic->port_mtu) {
345 if (mtu < enic->netdev->mtu)
346 printk(KERN_WARNING PFX
347 "%s: interface MTU (%d) set higher "
348 "than switch port MTU (%d)\n",
349 enic->netdev->name, enic->netdev->mtu, mtu);
350 enic->port_mtu = mtu;
351 }
352}
353
354static void enic_msglvl_check(struct enic *enic)
355{
356 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
357
358 if (msg_enable != enic->msg_enable) {
359 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
360 enic->netdev->name, enic->msg_enable, msg_enable);
361 enic->msg_enable = msg_enable;
362 }
363}
364
365static void enic_notify_check(struct enic *enic)
366{
367 enic_msglvl_check(enic);
368 enic_mtu_check(enic);
369 enic_link_check(enic);
370}
371
372#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
373
374static irqreturn_t enic_isr_legacy(int irq, void *data)
375{
376 struct net_device *netdev = data;
377 struct enic *enic = netdev_priv(netdev);
378 u32 pba;
379
380 vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
381
382 pba = vnic_intr_legacy_pba(enic->legacy_pba);
383 if (!pba) {
384 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
385 return IRQ_NONE; /* not our interrupt */
386 }
387
388 if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY))
389 enic_notify_check(enic);
390
391 if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
392 enic_log_q_error(enic);
393 /* schedule recovery from WQ/RQ error */
394 schedule_work(&enic->reset);
395 return IRQ_HANDLED;
396 }
397
398 if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
399 if (netif_rx_schedule_prep(netdev, &enic->napi))
400 __netif_rx_schedule(netdev, &enic->napi);
401 } else {
402 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
403 }
404
405 return IRQ_HANDLED;
406}
407
408static irqreturn_t enic_isr_msi(int irq, void *data)
409{
410 struct enic *enic = data;
411
412 /* With MSI, there is no sharing of interrupts, so this is
413 * our interrupt and there is no need to ack it. The device
414 * is not providing per-vector masking, so the OS will not
415 * write to PCI config space to mask/unmask the interrupt.
416 * We're using mask_on_assertion for MSI, so the device
417 * automatically masks the interrupt when the interrupt is
418 * generated. Later, when exiting polling, the interrupt
419 * will be unmasked (see enic_poll).
420 *
421 * Also, the device uses the same PCIe Traffic Class (TC)
422 * for Memory Write data and MSI, so there are no ordering
423 * issues; the MSI will always arrive at the Root Complex
424 * _after_ corresponding Memory Writes (i.e. descriptor
425 * writes).
426 */
427
428 netif_rx_schedule(enic->netdev, &enic->napi);
429
430 return IRQ_HANDLED;
431}
432
433static irqreturn_t enic_isr_msix_rq(int irq, void *data)
434{
435 struct enic *enic = data;
436
437 /* schedule NAPI polling for RQ cleanup */
438 netif_rx_schedule(enic->netdev, &enic->napi);
439
440 return IRQ_HANDLED;
441}
442
443static irqreturn_t enic_isr_msix_wq(int irq, void *data)
444{
445 struct enic *enic = data;
446 unsigned int wq_work_to_do = -1; /* no limit */
447 unsigned int wq_work_done;
448
449 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
450 wq_work_to_do, enic_wq_service, NULL);
451
452 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
453 wq_work_done,
454 1 /* unmask intr */,
455 1 /* reset intr timer */);
456
457 return IRQ_HANDLED;
458}
459
460static irqreturn_t enic_isr_msix_err(int irq, void *data)
461{
462 struct enic *enic = data;
463
464 enic_log_q_error(enic);
465
466 /* schedule recovery from WQ/RQ error */
467 schedule_work(&enic->reset);
468
469 return IRQ_HANDLED;
470}
471
472static irqreturn_t enic_isr_msix_notify(int irq, void *data)
473{
474 struct enic *enic = data;
475
476 enic_notify_check(enic);
477 vnic_intr_unmask(&enic->intr[ENIC_MSIX_NOTIFY]);
478
479 return IRQ_HANDLED;
480}
481
482static inline void enic_queue_wq_skb_cont(struct enic *enic,
483 struct vnic_wq *wq, struct sk_buff *skb,
484 unsigned int len_left)
485{
486 skb_frag_t *frag;
487
488 /* Queue additional data fragments */
489 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
490 len_left -= frag->size;
491 enic_queue_wq_desc_cont(wq, skb,
492 pci_map_page(enic->pdev, frag->page,
493 frag->page_offset, frag->size,
494 PCI_DMA_TODEVICE),
495 frag->size,
496 (len_left == 0)); /* EOP? */
497 }
498}
499
500static inline void enic_queue_wq_skb_vlan(struct enic *enic,
501 struct vnic_wq *wq, struct sk_buff *skb,
502 int vlan_tag_insert, unsigned int vlan_tag)
503{
504 unsigned int head_len = skb_headlen(skb);
505 unsigned int len_left = skb->len - head_len;
506 int eop = (len_left == 0);
507
508 /* Queue the main skb fragment */
509 enic_queue_wq_desc(wq, skb,
510 pci_map_single(enic->pdev, skb->data,
511 head_len, PCI_DMA_TODEVICE),
512 head_len,
513 vlan_tag_insert, vlan_tag,
514 eop);
515
516 if (!eop)
517 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
518}
519
520static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
521 struct vnic_wq *wq, struct sk_buff *skb,
522 int vlan_tag_insert, unsigned int vlan_tag)
523{
524 unsigned int head_len = skb_headlen(skb);
525 unsigned int len_left = skb->len - head_len;
526 unsigned int hdr_len = skb_transport_offset(skb);
527 unsigned int csum_offset = hdr_len + skb->csum_offset;
528 int eop = (len_left == 0);
529
530 /* Queue the main skb fragment */
531 enic_queue_wq_desc_csum_l4(wq, skb,
532 pci_map_single(enic->pdev, skb->data,
533 head_len, PCI_DMA_TODEVICE),
534 head_len,
535 csum_offset,
536 hdr_len,
537 vlan_tag_insert, vlan_tag,
538 eop);
539
540 if (!eop)
541 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
542}
543
544static inline void enic_queue_wq_skb_tso(struct enic *enic,
545 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
546 int vlan_tag_insert, unsigned int vlan_tag)
547{
548 unsigned int head_len = skb_headlen(skb);
549 unsigned int len_left = skb->len - head_len;
550 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
551 int eop = (len_left == 0);
552
553 /* Preload TCP csum field with IP pseudo hdr calculated
554 * with IP length set to zero. HW will later add in length
555 * to each TCP segment resulting from the TSO.
556 */
557
558 if (skb->protocol == __constant_htons(ETH_P_IP)) {
559 ip_hdr(skb)->check = 0;
560 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
561 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
562 } else if (skb->protocol == __constant_htons(ETH_P_IPV6)) {
563 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
564 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
565 }
566
567 /* Queue the main skb fragment */
568 enic_queue_wq_desc_tso(wq, skb,
569 pci_map_single(enic->pdev, skb->data,
570 head_len, PCI_DMA_TODEVICE),
571 head_len,
572 mss, hdr_len,
573 vlan_tag_insert, vlan_tag,
574 eop);
575
576 if (!eop)
577 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
578}
579
580static inline void enic_queue_wq_skb(struct enic *enic,
581 struct vnic_wq *wq, struct sk_buff *skb)
582{
583 unsigned int mss = skb_shinfo(skb)->gso_size;
584 unsigned int vlan_tag = 0;
585 int vlan_tag_insert = 0;
586
587 if (enic->vlan_group && vlan_tx_tag_present(skb)) {
588 /* VLAN tag from trunking driver */
589 vlan_tag_insert = 1;
590 vlan_tag = vlan_tx_tag_get(skb);
591 }
592
593 if (mss)
594 enic_queue_wq_skb_tso(enic, wq, skb, mss,
595 vlan_tag_insert, vlan_tag);
596 else if (skb->ip_summed == CHECKSUM_PARTIAL)
597 enic_queue_wq_skb_csum_l4(enic, wq, skb,
598 vlan_tag_insert, vlan_tag);
599 else
600 enic_queue_wq_skb_vlan(enic, wq, skb,
601 vlan_tag_insert, vlan_tag);
602}
603
604/* netif_tx_lock held, process context with BHs disabled */
605static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
606{
607 struct enic *enic = netdev_priv(netdev);
608 struct vnic_wq *wq = &enic->wq[0];
609 unsigned long flags;
610
611 if (skb->len <= 0) {
612 dev_kfree_skb(skb);
613 return NETDEV_TX_OK;
614 }
615
616 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
617 * which is very likely. In the off chance it's going to take
618 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
619 */
620
621 if (skb_shinfo(skb)->gso_size == 0 &&
622 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
623 skb_linearize(skb)) {
624 dev_kfree_skb(skb);
625 return NETDEV_TX_OK;
626 }
627
628 spin_lock_irqsave(&enic->wq_lock[0], flags);
629
630 if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) {
631 netif_stop_queue(netdev);
632 /* This is a hard error, log it */
633 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
634 "queue awake!\n", netdev->name);
635 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
636 return NETDEV_TX_BUSY;
637 }
638
639 enic_queue_wq_skb(enic, wq, skb);
640
641 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1)
642 netif_stop_queue(netdev);
643
644 netdev->trans_start = jiffies;
645
646 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
647
648 return NETDEV_TX_OK;
649}
650
651/* dev_base_lock rwlock held, nominally process context */
652static struct net_device_stats *enic_get_stats(struct net_device *netdev)
653{
654 struct enic *enic = netdev_priv(netdev);
655 struct vnic_stats *stats;
656
657 spin_lock(&enic->devcmd_lock);
658 vnic_dev_stats_dump(enic->vdev, &stats);
659 spin_unlock(&enic->devcmd_lock);
660
661 enic->net_stats.tx_packets = stats->tx.tx_frames_ok;
662 enic->net_stats.tx_bytes = stats->tx.tx_bytes_ok;
663 enic->net_stats.tx_errors = stats->tx.tx_errors;
664 enic->net_stats.tx_dropped = stats->tx.tx_drops;
665
666 enic->net_stats.rx_packets = stats->rx.rx_frames_ok;
667 enic->net_stats.rx_bytes = stats->rx.rx_bytes_ok;
668 enic->net_stats.rx_errors = stats->rx.rx_errors;
669 enic->net_stats.multicast = stats->rx.rx_multicast_frames_ok;
670 enic->net_stats.rx_crc_errors = stats->rx.rx_crc_errors;
671 enic->net_stats.rx_dropped = stats->rx.rx_no_bufs;
672
673 return &enic->net_stats;
674}
675
676static void enic_reset_mcaddrs(struct enic *enic)
677{
678 enic->mc_count = 0;
679}
680
681static int enic_set_mac_addr(struct net_device *netdev, char *addr)
682{
683 if (!is_valid_ether_addr(addr))
684 return -EADDRNOTAVAIL;
685
686 memcpy(netdev->dev_addr, addr, netdev->addr_len);
687
688 return 0;
689}
690
691/* netif_tx_lock held, BHs disabled */
692static void enic_set_multicast_list(struct net_device *netdev)
693{
694 struct enic *enic = netdev_priv(netdev);
695 struct dev_mc_list *list = netdev->mc_list;
696 int directed = 1;
697 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
698 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
699 int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
700 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
701 (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
702 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
703 unsigned int mc_count = netdev->mc_count;
704 unsigned int i, j;
705
706 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
707 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
708
709 spin_lock(&enic->devcmd_lock);
710
711 vnic_dev_packet_filter(enic->vdev, directed,
712 multicast, broadcast, promisc, allmulti);
713
714 /* Is there an easier way? Trying to minimize to
715 * calls to add/del multicast addrs. We keep the
716 * addrs from the last call in enic->mc_addr and
717 * look for changes to add/del.
718 */
719
720 for (i = 0; list && i < mc_count; i++) {
721 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
722 list = list->next;
723 }
724
725 for (i = 0; i < enic->mc_count; i++) {
726 for (j = 0; j < mc_count; j++)
727 if (compare_ether_addr(enic->mc_addr[i],
728 mc_addr[j]) == 0)
729 break;
730 if (j == mc_count)
731 enic_del_multicast_addr(enic, enic->mc_addr[i]);
732 }
733
734 for (i = 0; i < mc_count; i++) {
735 for (j = 0; j < enic->mc_count; j++)
736 if (compare_ether_addr(mc_addr[i],
737 enic->mc_addr[j]) == 0)
738 break;
739 if (j == enic->mc_count)
740 enic_add_multicast_addr(enic, mc_addr[i]);
741 }
742
743 /* Save the list to compare against next time
744 */
745
746 for (i = 0; i < mc_count; i++)
747 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
748
749 enic->mc_count = mc_count;
750
751 spin_unlock(&enic->devcmd_lock);
752}
753
754/* rtnl lock is held */
755static void enic_vlan_rx_register(struct net_device *netdev,
756 struct vlan_group *vlan_group)
757{
758 struct enic *enic = netdev_priv(netdev);
759 enic->vlan_group = vlan_group;
760}
761
762/* rtnl lock is held */
763static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
764{
765 struct enic *enic = netdev_priv(netdev);
766
767 spin_lock(&enic->devcmd_lock);
768 enic_add_vlan(enic, vid);
769 spin_unlock(&enic->devcmd_lock);
770}
771
772/* rtnl lock is held */
773static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
774{
775 struct enic *enic = netdev_priv(netdev);
776
777 spin_lock(&enic->devcmd_lock);
778 enic_del_vlan(enic, vid);
779 spin_unlock(&enic->devcmd_lock);
780}
781
782/* netif_tx_lock held, BHs disabled */
783static void enic_tx_timeout(struct net_device *netdev)
784{
785 struct enic *enic = netdev_priv(netdev);
786 schedule_work(&enic->reset);
787}
788
789static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
790{
791 struct enic *enic = vnic_dev_priv(rq->vdev);
792
793 if (!buf->os_buf)
794 return;
795
796 pci_unmap_single(enic->pdev, buf->dma_addr,
797 buf->len, PCI_DMA_FROMDEVICE);
798 dev_kfree_skb_any(buf->os_buf);
799}
800
801static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size)
802{
803 struct sk_buff *skb;
804
805 skb = dev_alloc_skb(size + NET_IP_ALIGN);
806
807 if (skb)
808 skb_reserve(skb, NET_IP_ALIGN);
809
810 return skb;
811}
812
813static int enic_rq_alloc_buf(struct vnic_rq *rq)
814{
815 struct enic *enic = vnic_dev_priv(rq->vdev);
816 struct sk_buff *skb;
817 unsigned int len = enic->netdev->mtu + ETH_HLEN;
818 unsigned int os_buf_index = 0;
819 dma_addr_t dma_addr;
820
821 skb = enic_rq_alloc_skb(len);
822 if (!skb)
823 return -ENOMEM;
824
825 dma_addr = pci_map_single(enic->pdev, skb->data,
826 len, PCI_DMA_FROMDEVICE);
827
828 enic_queue_rq_desc(rq, skb, os_buf_index,
829 dma_addr, len);
830
831 return 0;
832}
833
834static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
835 void **tcph, u64 *hdr_flags, void *priv)
836{
837 struct cq_enet_rq_desc *cq_desc = priv;
838 unsigned int ip_len;
839 struct iphdr *iph;
840
841 u8 type, color, eop, sop, ingress_port, vlan_stripped;
842 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
843 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
844 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
845 u8 packet_error;
846 u16 q_number, completed_index, bytes_written, vlan, checksum;
847 u32 rss_hash;
848
849 cq_enet_rq_desc_dec(cq_desc,
850 &type, &color, &q_number, &completed_index,
851 &ingress_port, &fcoe, &eop, &sop, &rss_type,
852 &csum_not_calc, &rss_hash, &bytes_written,
853 &packet_error, &vlan_stripped, &vlan, &checksum,
854 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
855 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
856 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
857 &fcs_ok);
858
859 if (!(ipv4 && tcp && !ipv4_fragment))
860 return -1;
861
862 skb_reset_network_header(skb);
863 iph = ip_hdr(skb);
864
865 ip_len = ip_hdrlen(skb);
866 skb_set_transport_header(skb, ip_len);
867
868 /* check if ip header and tcp header are complete */
869 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
870 return -1;
871
872 *hdr_flags = LRO_IPV4 | LRO_TCP;
873 *tcph = tcp_hdr(skb);
874 *iphdr = iph;
875
876 return 0;
877}
878
879static void enic_rq_indicate_buf(struct vnic_rq *rq,
880 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
881 int skipped, void *opaque)
882{
883 struct enic *enic = vnic_dev_priv(rq->vdev);
884 struct sk_buff *skb;
885
886 u8 type, color, eop, sop, ingress_port, vlan_stripped;
887 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
888 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
889 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
890 u8 packet_error;
891 u16 q_number, completed_index, bytes_written, vlan, checksum;
892 u32 rss_hash;
893
894 if (skipped)
895 return;
896
897 skb = buf->os_buf;
898 prefetch(skb->data - NET_IP_ALIGN);
899 pci_unmap_single(enic->pdev, buf->dma_addr,
900 buf->len, PCI_DMA_FROMDEVICE);
901
902 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
903 &type, &color, &q_number, &completed_index,
904 &ingress_port, &fcoe, &eop, &sop, &rss_type,
905 &csum_not_calc, &rss_hash, &bytes_written,
906 &packet_error, &vlan_stripped, &vlan, &checksum,
907 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
908 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
909 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
910 &fcs_ok);
911
912 if (packet_error) {
913
914 if (bytes_written > 0 && !fcs_ok) {
915 if (net_ratelimit())
916 printk(KERN_ERR PFX
917 "%s: packet error: bad FCS\n",
918 enic->netdev->name);
919 }
920
921 dev_kfree_skb_any(skb);
922
923 return;
924 }
925
926 if (eop && bytes_written > 0) {
927
928 /* Good receive
929 */
930
931 skb_put(skb, bytes_written);
932 skb->protocol = eth_type_trans(skb, enic->netdev);
933
934 if (enic->csum_rx_enabled && !csum_not_calc) {
935 skb->csum = htons(checksum);
936 skb->ip_summed = CHECKSUM_COMPLETE;
937 }
938
939 skb->dev = enic->netdev;
940 enic->netdev->last_rx = jiffies;
941
942 if (enic->vlan_group && vlan_stripped) {
943
944 if (ENIC_SETTING(enic, LRO))
945 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
946 skb, enic->vlan_group,
947 vlan, cq_desc);
948 else
949 vlan_hwaccel_receive_skb(skb,
950 enic->vlan_group, vlan);
951
952 } else {
953
954 if (ENIC_SETTING(enic, LRO))
955 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
956 else
957 netif_receive_skb(skb);
958
959 }
960
961 } else {
962
963 /* Buffer overflow
964 */
965
966 dev_kfree_skb_any(skb);
967 }
968}
969
970static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
971 u8 type, u16 q_number, u16 completed_index, void *opaque)
972{
973 struct enic *enic = vnic_dev_priv(vdev);
974
975 vnic_rq_service(&enic->rq[q_number], cq_desc,
976 completed_index, VNIC_RQ_RETURN_DESC,
977 enic_rq_indicate_buf, opaque);
978
979 return 0;
980}
981
982static void enic_rq_drop_buf(struct vnic_rq *rq,
983 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
984 int skipped, void *opaque)
985{
986 struct enic *enic = vnic_dev_priv(rq->vdev);
987 struct sk_buff *skb = buf->os_buf;
988
989 if (skipped)
990 return;
991
992 pci_unmap_single(enic->pdev, buf->dma_addr,
993 buf->len, PCI_DMA_FROMDEVICE);
994
995 dev_kfree_skb_any(skb);
996}
997
998static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
999 u8 type, u16 q_number, u16 completed_index, void *opaque)
1000{
1001 struct enic *enic = vnic_dev_priv(vdev);
1002
1003 vnic_rq_service(&enic->rq[q_number], cq_desc,
1004 completed_index, VNIC_RQ_RETURN_DESC,
1005 enic_rq_drop_buf, opaque);
1006
1007 return 0;
1008}
1009
1010static int enic_poll(struct napi_struct *napi, int budget)
1011{
1012 struct enic *enic = container_of(napi, struct enic, napi);
1013 struct net_device *netdev = enic->netdev;
1014 unsigned int rq_work_to_do = budget;
1015 unsigned int wq_work_to_do = -1; /* no limit */
1016 unsigned int work_done, rq_work_done, wq_work_done;
1017
1018 /* Service RQ (first) and WQ
1019 */
1020
1021 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1022 rq_work_to_do, enic_rq_service, NULL);
1023
1024 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1025 wq_work_to_do, enic_wq_service, NULL);
1026
1027 /* Accumulate intr event credits for this polling
1028 * cycle. An intr event is the completion of a
1029 * a WQ or RQ packet.
1030 */
1031
1032 work_done = rq_work_done + wq_work_done;
1033
1034 if (work_done > 0)
1035 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1036 work_done,
1037 0 /* don't unmask intr */,
1038 0 /* don't reset intr timer */);
1039
1040 if (rq_work_done > 0) {
1041
1042 /* Replenish RQ
1043 */
1044
1045 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1046
1047 } else {
1048
1049 /* If no work done, flush all LROs and exit polling
1050 */
1051
1052 if (ENIC_SETTING(enic, LRO))
1053 lro_flush_all(&enic->lro_mgr);
1054
1055 netif_rx_complete(netdev, napi);
1056 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1057 }
1058
1059 return rq_work_done;
1060}
1061
1062static int enic_poll_msix(struct napi_struct *napi, int budget)
1063{
1064 struct enic *enic = container_of(napi, struct enic, napi);
1065 struct net_device *netdev = enic->netdev;
1066 unsigned int work_to_do = budget;
1067 unsigned int work_done;
1068
1069 /* Service RQ
1070 */
1071
1072 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1073 work_to_do, enic_rq_service, NULL);
1074
1075 if (work_done > 0) {
1076
1077 /* Replenish RQ
1078 */
1079
1080 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1081
1082 /* Accumulate intr event credits for this polling
1083 * cycle. An intr event is the completion of a
1084 * a WQ or RQ packet.
1085 */
1086
1087 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1088 work_done,
1089 0 /* don't unmask intr */,
1090 0 /* don't reset intr timer */);
1091 } else {
1092
1093 /* If no work done, flush all LROs and exit polling
1094 */
1095
1096 if (ENIC_SETTING(enic, LRO))
1097 lro_flush_all(&enic->lro_mgr);
1098
1099 netif_rx_complete(netdev, napi);
1100 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1101 }
1102
1103 return work_done;
1104}
1105
1106static void enic_notify_timer(unsigned long data)
1107{
1108 struct enic *enic = (struct enic *)data;
1109
1110 enic_notify_check(enic);
1111
1112 mod_timer(&enic->notify_timer, round_jiffies(ENIC_NOTIFY_TIMER_PERIOD));
1113}
1114
1115static void enic_free_intr(struct enic *enic)
1116{
1117 struct net_device *netdev = enic->netdev;
1118 unsigned int i;
1119
1120 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1121 case VNIC_DEV_INTR_MODE_INTX:
1122 case VNIC_DEV_INTR_MODE_MSI:
1123 free_irq(enic->pdev->irq, netdev);
1124 break;
1125 case VNIC_DEV_INTR_MODE_MSIX:
1126 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1127 if (enic->msix[i].requested)
1128 free_irq(enic->msix_entry[i].vector,
1129 enic->msix[i].devid);
1130 break;
1131 default:
1132 break;
1133 }
1134}
1135
1136static int enic_request_intr(struct enic *enic)
1137{
1138 struct net_device *netdev = enic->netdev;
1139 unsigned int i;
1140 int err = 0;
1141
1142 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1143
1144 case VNIC_DEV_INTR_MODE_INTX:
1145
1146 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1147 IRQF_SHARED, netdev->name, netdev);
1148 break;
1149
1150 case VNIC_DEV_INTR_MODE_MSI:
1151
1152 err = request_irq(enic->pdev->irq, enic_isr_msi,
1153 0, netdev->name, enic);
1154 break;
1155
1156 case VNIC_DEV_INTR_MODE_MSIX:
1157
1158 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1159 "%.11s-rx", netdev->name);
1160 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1161 enic->msix[ENIC_MSIX_RQ].devid = enic;
1162
1163 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1164 "%.11s-tx", netdev->name);
1165 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1166 enic->msix[ENIC_MSIX_WQ].devid = enic;
1167
1168 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1169 "%.11s-err", netdev->name);
1170 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1171 enic->msix[ENIC_MSIX_ERR].devid = enic;
1172
1173 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1174 "%.11s-notify", netdev->name);
1175 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1176 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1177
1178 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1179 err = request_irq(enic->msix_entry[i].vector,
1180 enic->msix[i].isr, 0,
1181 enic->msix[i].devname,
1182 enic->msix[i].devid);
1183 if (err) {
1184 enic_free_intr(enic);
1185 break;
1186 }
1187 enic->msix[i].requested = 1;
1188 }
1189
1190 break;
1191
1192 default:
1193 break;
1194 }
1195
1196 return err;
1197}
1198
1199static int enic_notify_set(struct enic *enic)
1200{
1201 int err;
1202
1203 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1204 case VNIC_DEV_INTR_MODE_INTX:
1205 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1206 break;
1207 case VNIC_DEV_INTR_MODE_MSIX:
1208 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1209 break;
1210 default:
1211 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1212 break;
1213 }
1214
1215 return err;
1216}
1217
1218static void enic_notify_timer_start(struct enic *enic)
1219{
1220 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1221 case VNIC_DEV_INTR_MODE_MSI:
1222 mod_timer(&enic->notify_timer, jiffies);
1223 break;
1224 default:
1225 /* Using intr for notification for INTx/MSI-X */
1226 break;
1227 };
1228}
1229
1230/* rtnl lock is held, process context */
1231static int enic_open(struct net_device *netdev)
1232{
1233 struct enic *enic = netdev_priv(netdev);
1234 unsigned int i;
1235 int err;
1236
1237 for (i = 0; i < enic->rq_count; i++) {
1238 err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1239 if (err) {
1240 printk(KERN_ERR PFX
1241 "%s: Unable to alloc receive buffers.\n",
1242 netdev->name);
1243 return err;
1244 }
1245 }
1246
1247 for (i = 0; i < enic->wq_count; i++)
1248 vnic_wq_enable(&enic->wq[i]);
1249 for (i = 0; i < enic->rq_count; i++)
1250 vnic_rq_enable(&enic->rq[i]);
1251
1252 enic_add_station_addr(enic);
1253 enic_set_multicast_list(netdev);
1254
1255 netif_wake_queue(netdev);
1256 napi_enable(&enic->napi);
1257 vnic_dev_enable(enic->vdev);
1258
1259 for (i = 0; i < enic->intr_count; i++)
1260 vnic_intr_unmask(&enic->intr[i]);
1261
1262 enic_notify_timer_start(enic);
1263
1264 return 0;
1265}
1266
1267/* rtnl lock is held, process context */
1268static int enic_stop(struct net_device *netdev)
1269{
1270 struct enic *enic = netdev_priv(netdev);
1271 unsigned int i;
1272 int err;
1273
1274 del_timer_sync(&enic->notify_timer);
1275
1276 vnic_dev_disable(enic->vdev);
1277 napi_disable(&enic->napi);
1278 netif_stop_queue(netdev);
1279
1280 for (i = 0; i < enic->intr_count; i++)
1281 vnic_intr_mask(&enic->intr[i]);
1282
1283 for (i = 0; i < enic->wq_count; i++) {
1284 err = vnic_wq_disable(&enic->wq[i]);
1285 if (err)
1286 return err;
1287 }
1288 for (i = 0; i < enic->rq_count; i++) {
1289 err = vnic_rq_disable(&enic->rq[i]);
1290 if (err)
1291 return err;
1292 }
1293
1294 (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1295 -1, enic_rq_service_drop, NULL);
1296 (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1297 -1, enic_wq_service, NULL);
1298
1299 for (i = 0; i < enic->wq_count; i++)
1300 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1301 for (i = 0; i < enic->rq_count; i++)
1302 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1303 for (i = 0; i < enic->cq_count; i++)
1304 vnic_cq_clean(&enic->cq[i]);
1305 for (i = 0; i < enic->intr_count; i++)
1306 vnic_intr_clean(&enic->intr[i]);
1307
1308 return 0;
1309}
1310
1311static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1312{
1313 struct enic *enic = netdev_priv(netdev);
1314 int running = netif_running(netdev);
1315
1316 if (running)
1317 enic_stop(netdev);
1318
1319 if (new_mtu < ENIC_MIN_MTU)
1320 new_mtu = ENIC_MIN_MTU;
1321 if (new_mtu > ENIC_MAX_MTU)
1322 new_mtu = ENIC_MAX_MTU;
1323
1324 netdev->mtu = new_mtu;
1325
1326 if (netdev->mtu > enic->port_mtu)
1327 printk(KERN_WARNING PFX
1328 "%s: interface MTU (%d) set higher "
1329 "than port MTU (%d)\n",
1330 netdev->name, netdev->mtu, enic->port_mtu);
1331
1332 if (running)
1333 enic_open(netdev);
1334
1335 return 0;
1336}
1337
1338#ifdef CONFIG_NET_POLL_CONTROLLER
1339static void enic_poll_controller(struct net_device *netdev)
1340{
1341 struct enic *enic = netdev_priv(netdev);
1342 struct vnic_dev *vdev = enic->vdev;
1343
1344 switch (vnic_dev_get_intr_mode(vdev)) {
1345 case VNIC_DEV_INTR_MODE_MSIX:
1346 enic_isr_msix_rq(enic->pdev->irq, enic);
1347 enic_isr_msix_wq(enic->pdev->irq, enic);
1348 break;
1349 case VNIC_DEV_INTR_MODE_MSI:
1350 enic_isr_msi(enic->pdev->irq, enic);
1351 break;
1352 case VNIC_DEV_INTR_MODE_INTX:
1353 enic_isr_legacy(enic->pdev->irq, netdev);
1354 break;
1355 default:
1356 break;
1357 }
1358}
1359#endif
1360
1361static int enic_dev_wait(struct vnic_dev *vdev,
1362 int (*start)(struct vnic_dev *, int),
1363 int (*finished)(struct vnic_dev *, int *),
1364 int arg)
1365{
1366 unsigned long time;
1367 int done;
1368 int err;
1369
1370 BUG_ON(in_interrupt());
1371
1372 err = start(vdev, arg);
1373 if (err)
1374 return err;
1375
1376 /* Wait for func to complete...2 seconds max
1377 */
1378
1379 time = jiffies + (HZ * 2);
1380 do {
1381
1382 err = finished(vdev, &done);
1383 if (err)
1384 return err;
1385
1386 if (done)
1387 return 0;
1388
1389 schedule_timeout_uninterruptible(HZ / 10);
1390
1391 } while (time_after(time, jiffies));
1392
1393 return -ETIMEDOUT;
1394}
1395
1396static int enic_dev_open(struct enic *enic)
1397{
1398 int err;
1399
1400 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1401 vnic_dev_open_done, 0);
1402 if (err)
1403 printk(KERN_ERR PFX
1404 "vNIC device open failed, err %d.\n", err);
1405
1406 return err;
1407}
1408
1409static int enic_dev_soft_reset(struct enic *enic)
1410{
1411 int err;
1412
1413 err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1414 vnic_dev_soft_reset_done, 0);
1415 if (err)
1416 printk(KERN_ERR PFX
1417 "vNIC soft reset failed, err %d.\n", err);
1418
1419 return err;
1420}
1421
1422static void enic_reset(struct work_struct *work)
1423{
1424 struct enic *enic = container_of(work, struct enic, reset);
1425
1426 if (!netif_running(enic->netdev))
1427 return;
1428
1429 rtnl_lock();
1430
1431 spin_lock(&enic->devcmd_lock);
1432 vnic_dev_hang_notify(enic->vdev);
1433 spin_unlock(&enic->devcmd_lock);
1434
1435 enic_stop(enic->netdev);
1436 enic_dev_soft_reset(enic);
1437 enic_reset_mcaddrs(enic);
1438 enic_init_vnic_resources(enic);
1439 enic_open(enic->netdev);
1440
1441 rtnl_unlock();
1442}
1443
1444static int enic_set_intr_mode(struct enic *enic)
1445{
1446 unsigned int n = ARRAY_SIZE(enic->rq);
1447 unsigned int m = ARRAY_SIZE(enic->wq);
1448 unsigned int i;
1449
1450 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1451 * system capabilities.
1452 *
1453 * Try MSI-X first
1454 *
1455 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1456 * (the second to last INTR is used for WQ/RQ errors)
1457 * (the last INTR is used for notifications)
1458 */
1459
1460 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1461 for (i = 0; i < n + m + 2; i++)
1462 enic->msix_entry[i].entry = i;
1463
1464 if (enic->config.intr_mode < 1 &&
1465 enic->rq_count >= n &&
1466 enic->wq_count >= m &&
1467 enic->cq_count >= n + m &&
1468 enic->intr_count >= n + m + 2 &&
1469 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1470
1471 enic->rq_count = n;
1472 enic->wq_count = m;
1473 enic->cq_count = n + m;
1474 enic->intr_count = n + m + 2;
1475
1476 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1477
1478 return 0;
1479 }
1480
1481 /* Next try MSI
1482 *
1483 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1484 */
1485
1486 if (enic->config.intr_mode < 2 &&
1487 enic->rq_count >= 1 &&
1488 enic->wq_count >= 1 &&
1489 enic->cq_count >= 2 &&
1490 enic->intr_count >= 1 &&
1491 !pci_enable_msi(enic->pdev)) {
1492
1493 enic->rq_count = 1;
1494 enic->wq_count = 1;
1495 enic->cq_count = 2;
1496 enic->intr_count = 1;
1497
1498 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1499
1500 return 0;
1501 }
1502
1503 /* Next try INTx
1504 *
1505 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1506 * (the first INTR is used for WQ/RQ)
1507 * (the second INTR is used for WQ/RQ errors)
1508 * (the last INTR is used for notifications)
1509 */
1510
1511 if (enic->config.intr_mode < 3 &&
1512 enic->rq_count >= 1 &&
1513 enic->wq_count >= 1 &&
1514 enic->cq_count >= 2 &&
1515 enic->intr_count >= 3) {
1516
1517 enic->rq_count = 1;
1518 enic->wq_count = 1;
1519 enic->cq_count = 2;
1520 enic->intr_count = 3;
1521
1522 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1523
1524 return 0;
1525 }
1526
1527 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1528
1529 return -EINVAL;
1530}
1531
1532static void enic_clear_intr_mode(struct enic *enic)
1533{
1534 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1535 case VNIC_DEV_INTR_MODE_MSIX:
1536 pci_disable_msix(enic->pdev);
1537 break;
1538 case VNIC_DEV_INTR_MODE_MSI:
1539 pci_disable_msi(enic->pdev);
1540 break;
1541 default:
1542 break;
1543 }
1544
1545 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1546}
1547
1548static void enic_iounmap(struct enic *enic)
1549{
1550 if (enic->bar0.vaddr)
1551 iounmap(enic->bar0.vaddr);
1552}
1553
1554static int __devinit enic_probe(struct pci_dev *pdev,
1555 const struct pci_device_id *ent)
1556{
1557 struct net_device *netdev;
1558 struct enic *enic;
1559 int using_dac = 0;
1560 unsigned int i;
1561 int err;
1562
1563 const u8 rss_default_cpu = 0;
1564 const u8 rss_hash_type = 0;
1565 const u8 rss_hash_bits = 0;
1566 const u8 rss_base_cpu = 0;
1567 const u8 rss_enable = 0;
1568 const u8 tso_ipid_split_en = 0;
1569 const u8 ig_vlan_strip_en = 1;
1570
1571 /* Allocate net device structure and initialize. Private
1572 * instance data is initialized to zero.
1573 */
1574
1575 netdev = alloc_etherdev(sizeof(struct enic));
1576 if (!netdev) {
1577 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1578 return -ENOMEM;
1579 }
1580
1581 /* Set the netdev name early so intr vectors are properly
1582 * named and any error msgs can include netdev->name
1583 */
1584
1585 rtnl_lock();
1586 err = dev_alloc_name(netdev, netdev->name);
1587 rtnl_unlock();
1588 if (err < 0) {
1589 printk(KERN_ERR PFX "Unable to allocate netdev name.\n");
1590 goto err_out_free_netdev;
1591 }
1592
1593 pci_set_drvdata(pdev, netdev);
1594
1595 SET_NETDEV_DEV(netdev, &pdev->dev);
1596
1597 enic = netdev_priv(netdev);
1598 enic->netdev = netdev;
1599 enic->pdev = pdev;
1600
1601 /* Setup PCI resources
1602 */
1603
1604 err = pci_enable_device(pdev);
1605 if (err) {
1606 printk(KERN_ERR PFX
1607 "%s: Cannot enable PCI device, aborting.\n",
1608 netdev->name);
1609 goto err_out_free_netdev;
1610 }
1611
1612 err = pci_request_regions(pdev, DRV_NAME);
1613 if (err) {
1614 printk(KERN_ERR PFX
1615 "%s: Cannot request PCI regions, aborting.\n",
1616 netdev->name);
1617 goto err_out_disable_device;
1618 }
1619
1620 pci_set_master(pdev);
1621
1622 /* Query PCI controller on system for DMA addressing
1623 * limitation for the device. Try 40-bit first, and
1624 * fail to 32-bit.
1625 */
1626
1627 err = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
1628 if (err) {
1629 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1630 if (err) {
1631 printk(KERN_ERR PFX
1632 "%s: No usable DMA configuration, aborting.\n",
1633 netdev->name);
1634 goto err_out_release_regions;
1635 }
1636 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1637 if (err) {
1638 printk(KERN_ERR PFX
1639 "%s: Unable to obtain 32-bit DMA "
1640 "for consistent allocations, aborting.\n",
1641 netdev->name);
1642 goto err_out_release_regions;
1643 }
1644 } else {
1645 err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK);
1646 if (err) {
1647 printk(KERN_ERR PFX
1648 "%s: Unable to obtain 40-bit DMA "
1649 "for consistent allocations, aborting.\n",
1650 netdev->name);
1651 goto err_out_release_regions;
1652 }
1653 using_dac = 1;
1654 }
1655
1656 /* Map vNIC resources from BAR0
1657 */
1658
1659 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1660 printk(KERN_ERR PFX
1661 "%s: BAR0 not memory-map'able, aborting.\n",
1662 netdev->name);
1663 err = -ENODEV;
1664 goto err_out_release_regions;
1665 }
1666
1667 enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len);
1668 enic->bar0.bus_addr = pci_resource_start(pdev, 0);
1669 enic->bar0.len = pci_resource_len(pdev, 0);
1670
1671 if (!enic->bar0.vaddr) {
1672 printk(KERN_ERR PFX
1673 "%s: Cannot memory-map BAR0 res hdr, aborting.\n",
1674 netdev->name);
1675 err = -ENODEV;
1676 goto err_out_release_regions;
1677 }
1678
1679 /* Register vNIC device
1680 */
1681
1682 enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0);
1683 if (!enic->vdev) {
1684 printk(KERN_ERR PFX
1685 "%s: vNIC registration failed, aborting.\n",
1686 netdev->name);
1687 err = -ENODEV;
1688 goto err_out_iounmap;
1689 }
1690
1691 /* Issue device open to get device in known state
1692 */
1693
1694 err = enic_dev_open(enic);
1695 if (err) {
1696 printk(KERN_ERR PFX
1697 "%s: vNIC dev open failed, aborting.\n",
1698 netdev->name);
1699 goto err_out_vnic_unregister;
1700 }
1701
1702 /* Issue device init to initialize the vnic-to-switch link.
1703 * We'll start with carrier off and wait for link UP
1704 * notification later to turn on carrier. We don't need
1705 * to wait here for the vnic-to-switch link initialization
1706 * to complete; link UP notification is the indication that
1707 * the process is complete.
1708 */
1709
1710 netif_carrier_off(netdev);
1711
1712 err = vnic_dev_init(enic->vdev, 0);
1713 if (err) {
1714 printk(KERN_ERR PFX
1715 "%s: vNIC dev init failed, aborting.\n",
1716 netdev->name);
1717 goto err_out_dev_close;
1718 }
1719
1720 /* Get vNIC configuration
1721 */
1722
1723 err = enic_get_vnic_config(enic);
1724 if (err) {
1725 printk(KERN_ERR PFX
1726 "%s: Get vNIC configuration failed, aborting.\n",
1727 netdev->name);
1728 goto err_out_dev_close;
1729 }
1730
1731 /* Get available resource counts
1732 */
1733
1734 enic_get_res_counts(enic);
1735
1736 /* Set interrupt mode based on resource counts and system
1737 * capabilities
1738 */
1739
1740 err = enic_set_intr_mode(enic);
1741 if (err) {
1742 printk(KERN_ERR PFX
1743 "%s: Failed to set intr mode, aborting.\n",
1744 netdev->name);
1745 goto err_out_dev_close;
1746 }
1747
1748 /* Request interrupt vector(s)
1749 */
1750
1751 err = enic_request_intr(enic);
1752 if (err) {
1753 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1754 netdev->name);
1755 goto err_out_dev_close;
1756 }
1757
1758 /* Allocate and configure vNIC resources
1759 */
1760
1761 err = enic_alloc_vnic_resources(enic);
1762 if (err) {
1763 printk(KERN_ERR PFX
1764 "%s: Failed to alloc vNIC resources, aborting.\n",
1765 netdev->name);
1766 goto err_out_free_vnic_resources;
1767 }
1768
1769 enic_init_vnic_resources(enic);
1770
1771 /* Enable VLAN tag stripping. RSS not enabled (yet).
1772 */
1773
1774 err = enic_set_nic_cfg(enic,
1775 rss_default_cpu, rss_hash_type,
1776 rss_hash_bits, rss_base_cpu,
1777 rss_enable, tso_ipid_split_en,
1778 ig_vlan_strip_en);
1779 if (err) {
1780 printk(KERN_ERR PFX
1781 "%s: Failed to config nic, aborting.\n",
1782 netdev->name);
1783 goto err_out_free_vnic_resources;
1784 }
1785
1786 /* Setup notification buffer area
1787 */
1788
1789 err = enic_notify_set(enic);
1790 if (err) {
1791 printk(KERN_ERR PFX
1792 "%s: Failed to alloc notify buffer, aborting.\n",
1793 netdev->name);
1794 goto err_out_free_vnic_resources;
1795 }
1796
1797 /* Setup notification timer, HW reset task, and locks
1798 */
1799
1800 init_timer(&enic->notify_timer);
1801 enic->notify_timer.function = enic_notify_timer;
1802 enic->notify_timer.data = (unsigned long)enic;
1803
1804 INIT_WORK(&enic->reset, enic_reset);
1805
1806 for (i = 0; i < enic->wq_count; i++)
1807 spin_lock_init(&enic->wq_lock[i]);
1808
1809 spin_lock_init(&enic->devcmd_lock);
1810
1811 /* Register net device
1812 */
1813
1814 enic->port_mtu = enic->config.mtu;
1815 (void)enic_change_mtu(netdev, enic->port_mtu);
1816
1817 err = enic_set_mac_addr(netdev, enic->mac_addr);
1818 if (err) {
1819 printk(KERN_ERR PFX
1820 "%s: Invalid MAC address, aborting.\n",
1821 netdev->name);
1822 goto err_out_notify_unset;
1823 }
1824
1825 netdev->open = enic_open;
1826 netdev->stop = enic_stop;
1827 netdev->hard_start_xmit = enic_hard_start_xmit;
1828 netdev->get_stats = enic_get_stats;
1829 netdev->set_multicast_list = enic_set_multicast_list;
1830 netdev->change_mtu = enic_change_mtu;
1831 netdev->vlan_rx_register = enic_vlan_rx_register;
1832 netdev->vlan_rx_add_vid = enic_vlan_rx_add_vid;
1833 netdev->vlan_rx_kill_vid = enic_vlan_rx_kill_vid;
1834 netdev->tx_timeout = enic_tx_timeout;
1835 netdev->watchdog_timeo = 2 * HZ;
1836 netdev->ethtool_ops = &enic_ethtool_ops;
1837#ifdef CONFIG_NET_POLL_CONTROLLER
1838 netdev->poll_controller = enic_poll_controller;
1839#endif
1840
1841 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1842 default:
1843 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1844 break;
1845 case VNIC_DEV_INTR_MODE_MSIX:
1846 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1847 break;
1848 }
1849
1850 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1851 if (ENIC_SETTING(enic, TXCSUM))
1852 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1853 if (ENIC_SETTING(enic, TSO))
1854 netdev->features |= NETIF_F_TSO |
1855 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
1856 if (using_dac)
1857 netdev->features |= NETIF_F_HIGHDMA;
1858
1859
1860 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
1861
1862 if (ENIC_SETTING(enic, LRO)) {
1863 enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
1864 enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
1865 enic->lro_mgr.lro_arr = enic->lro_desc;
1866 enic->lro_mgr.get_skb_header = enic_get_skb_header;
1867 enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1868 enic->lro_mgr.dev = netdev;
1869 enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
1870 enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1871 }
1872
1873 err = register_netdev(netdev);
1874 if (err) {
1875 printk(KERN_ERR PFX
1876 "%s: Cannot register net device, aborting.\n",
1877 netdev->name);
1878 goto err_out_notify_unset;
1879 }
1880
1881 return 0;
1882
1883err_out_notify_unset:
1884 vnic_dev_notify_unset(enic->vdev);
1885err_out_free_vnic_resources:
1886 enic_free_vnic_resources(enic);
1887 enic_free_intr(enic);
1888err_out_dev_close:
1889 vnic_dev_close(enic->vdev);
1890err_out_vnic_unregister:
1891 enic_clear_intr_mode(enic);
1892 vnic_dev_unregister(enic->vdev);
1893err_out_iounmap:
1894 enic_iounmap(enic);
1895err_out_release_regions:
1896 pci_release_regions(pdev);
1897err_out_disable_device:
1898 pci_disable_device(pdev);
1899err_out_free_netdev:
1900 pci_set_drvdata(pdev, NULL);
1901 free_netdev(netdev);
1902
1903 return err;
1904}
1905
1906static void __devexit enic_remove(struct pci_dev *pdev)
1907{
1908 struct net_device *netdev = pci_get_drvdata(pdev);
1909
1910 if (netdev) {
1911 struct enic *enic = netdev_priv(netdev);
1912
1913 flush_scheduled_work();
1914 unregister_netdev(netdev);
1915 vnic_dev_notify_unset(enic->vdev);
1916 enic_free_vnic_resources(enic);
1917 enic_free_intr(enic);
1918 vnic_dev_close(enic->vdev);
1919 enic_clear_intr_mode(enic);
1920 vnic_dev_unregister(enic->vdev);
1921 enic_iounmap(enic);
1922 pci_release_regions(pdev);
1923 pci_disable_device(pdev);
1924 pci_set_drvdata(pdev, NULL);
1925 free_netdev(netdev);
1926 }
1927}
1928
1929static struct pci_driver enic_driver = {
1930 .name = DRV_NAME,
1931 .id_table = enic_id_table,
1932 .probe = enic_probe,
1933 .remove = __devexit_p(enic_remove),
1934};
1935
1936static int __init enic_init_module(void)
1937{
1938 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1939
1940 return pci_register_driver(&enic_driver);
1941}
1942
1943static void __exit enic_cleanup_module(void)
1944{
1945 pci_unregister_driver(&enic_driver);
1946}
1947
1948module_init(enic_init_module);
1949module_exit(enic_cleanup_module);
diff --git a/drivers/net/enic/enic_res.c b/drivers/net/enic/enic_res.c
new file mode 100644
index 000000000000..95184b9108ef
--- /dev/null
+++ b/drivers/net/enic/enic_res.c
@@ -0,0 +1,370 @@
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
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/pci.h>
24#include <linux/netdevice.h>
25
26#include "wq_enet_desc.h"
27#include "rq_enet_desc.h"
28#include "cq_enet_desc.h"
29#include "vnic_resource.h"
30#include "vnic_enet.h"
31#include "vnic_dev.h"
32#include "vnic_wq.h"
33#include "vnic_rq.h"
34#include "vnic_cq.h"
35#include "vnic_intr.h"
36#include "vnic_stats.h"
37#include "vnic_nic.h"
38#include "vnic_rss.h"
39#include "enic_res.h"
40#include "enic.h"
41
42int enic_get_vnic_config(struct enic *enic)
43{
44 struct vnic_enet_config *c = &enic->config;
45 int err;
46
47 err = vnic_dev_mac_addr(enic->vdev, enic->mac_addr);
48 if (err) {
49 printk(KERN_ERR PFX "Error getting MAC addr, %d\n", err);
50 return err;
51 }
52
53#define GET_CONFIG(m) \
54 do { \
55 err = vnic_dev_spec(enic->vdev, \
56 offsetof(struct vnic_enet_config, m), \
57 sizeof(c->m), &c->m); \
58 if (err) { \
59 printk(KERN_ERR PFX \
60 "Error getting %s, %d\n", #m, err); \
61 return err; \
62 } \
63 } while (0)
64
65 GET_CONFIG(flags);
66 GET_CONFIG(wq_desc_count);
67 GET_CONFIG(rq_desc_count);
68 GET_CONFIG(mtu);
69 GET_CONFIG(intr_timer);
70 GET_CONFIG(intr_timer_type);
71 GET_CONFIG(intr_mode);
72
73 c->wq_desc_count =
74 min_t(u32, ENIC_MAX_WQ_DESCS,
75 max_t(u32, ENIC_MIN_WQ_DESCS,
76 c->wq_desc_count));
77 c->wq_desc_count &= 0xfffffff0; /* must be aligned to groups of 16 */
78
79 c->rq_desc_count =
80 min_t(u32, ENIC_MAX_RQ_DESCS,
81 max_t(u32, ENIC_MIN_RQ_DESCS,
82 c->rq_desc_count));
83 c->rq_desc_count &= 0xfffffff0; /* must be aligned to groups of 16 */
84
85 if (c->mtu == 0)
86 c->mtu = 1500;
87 c->mtu = min_t(u16, ENIC_MAX_MTU,
88 max_t(u16, ENIC_MIN_MTU,
89 c->mtu));
90
91 c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
92
93 printk(KERN_INFO PFX "vNIC MAC addr %02x:%02x:%02x:%02x:%02x:%02x "
94 "wq/rq %d/%d\n",
95 enic->mac_addr[0], enic->mac_addr[1], enic->mac_addr[2],
96 enic->mac_addr[3], enic->mac_addr[4], enic->mac_addr[5],
97 c->wq_desc_count, c->rq_desc_count);
98 printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
99 "intr timer %d\n",
100 c->mtu, ENIC_SETTING(enic, TXCSUM),
101 ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
102 ENIC_SETTING(enic, LRO), c->intr_timer);
103
104 return 0;
105}
106
107void enic_add_station_addr(struct enic *enic)
108{
109 vnic_dev_add_addr(enic->vdev, enic->mac_addr);
110}
111
112void enic_add_multicast_addr(struct enic *enic, u8 *addr)
113{
114 vnic_dev_add_addr(enic->vdev, addr);
115}
116
117void enic_del_multicast_addr(struct enic *enic, u8 *addr)
118{
119 vnic_dev_del_addr(enic->vdev, addr);
120}
121
122void enic_add_vlan(struct enic *enic, u16 vlanid)
123{
124 u64 a0 = vlanid, a1 = 0;
125 int wait = 1000;
126 int err;
127
128 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
129 if (err)
130 printk(KERN_ERR PFX "Can't add vlan id, %d\n", err);
131}
132
133void enic_del_vlan(struct enic *enic, u16 vlanid)
134{
135 u64 a0 = vlanid, a1 = 0;
136 int wait = 1000;
137 int err;
138
139 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
140 if (err)
141 printk(KERN_ERR PFX "Can't delete vlan id, %d\n", err);
142}
143
144int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
145 u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
146 u8 ig_vlan_strip_en)
147{
148 u64 a0, a1;
149 u32 nic_cfg;
150 int wait = 1000;
151
152 vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
153 rss_hash_type, rss_hash_bits, rss_base_cpu,
154 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
155
156 a0 = nic_cfg;
157 a1 = 0;
158
159 return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
160}
161
162void enic_free_vnic_resources(struct enic *enic)
163{
164 unsigned int i;
165
166 for (i = 0; i < enic->wq_count; i++)
167 vnic_wq_free(&enic->wq[i]);
168 for (i = 0; i < enic->rq_count; i++)
169 vnic_rq_free(&enic->rq[i]);
170 for (i = 0; i < enic->cq_count; i++)
171 vnic_cq_free(&enic->cq[i]);
172 for (i = 0; i < enic->intr_count; i++)
173 vnic_intr_free(&enic->intr[i]);
174}
175
176void enic_get_res_counts(struct enic *enic)
177{
178 enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
179 enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
180 enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
181 enic->intr_count = vnic_dev_get_res_count(enic->vdev,
182 RES_TYPE_INTR_CTRL);
183
184 printk(KERN_INFO PFX "vNIC resources avail: "
185 "wq %d rq %d cq %d intr %d\n",
186 enic->wq_count, enic->rq_count,
187 enic->cq_count, enic->intr_count);
188}
189
190void enic_init_vnic_resources(struct enic *enic)
191{
192 enum vnic_dev_intr_mode intr_mode;
193 unsigned int mask_on_assertion;
194 unsigned int interrupt_offset;
195 unsigned int error_interrupt_enable;
196 unsigned int error_interrupt_offset;
197 unsigned int cq_index;
198 unsigned int i;
199
200 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
201
202 /* Init RQ/WQ resources.
203 *
204 * RQ[0 - n-1] point to CQ[0 - n-1]
205 * WQ[0 - m-1] point to CQ[n - n+m-1]
206 *
207 * Error interrupt is not enabled for MSI.
208 */
209
210 switch (intr_mode) {
211 case VNIC_DEV_INTR_MODE_INTX:
212 case VNIC_DEV_INTR_MODE_MSIX:
213 error_interrupt_enable = 1;
214 error_interrupt_offset = enic->intr_count - 2;
215 break;
216 default:
217 error_interrupt_enable = 0;
218 error_interrupt_offset = 0;
219 break;
220 }
221
222 for (i = 0; i < enic->rq_count; i++) {
223 cq_index = i;
224 vnic_rq_init(&enic->rq[i],
225 cq_index,
226 error_interrupt_enable,
227 error_interrupt_offset);
228 }
229
230 for (i = 0; i < enic->wq_count; i++) {
231 cq_index = enic->rq_count + i;
232 vnic_wq_init(&enic->wq[i],
233 cq_index,
234 error_interrupt_enable,
235 error_interrupt_offset);
236 }
237
238 /* Init CQ resources
239 *
240 * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
241 * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
242 */
243
244 for (i = 0; i < enic->cq_count; i++) {
245
246 switch (intr_mode) {
247 case VNIC_DEV_INTR_MODE_MSIX:
248 interrupt_offset = i;
249 break;
250 default:
251 interrupt_offset = 0;
252 break;
253 }
254
255 vnic_cq_init(&enic->cq[i],
256 0 /* flow_control_enable */,
257 1 /* color_enable */,
258 0 /* cq_head */,
259 0 /* cq_tail */,
260 1 /* cq_tail_color */,
261 1 /* interrupt_enable */,
262 1 /* cq_entry_enable */,
263 0 /* cq_message_enable */,
264 interrupt_offset,
265 0 /* cq_message_addr */);
266 }
267
268 /* Init INTR resources
269 *
270 * mask_on_assertion is not used for INTx due to the level-
271 * triggered nature of INTx
272 */
273
274 switch (intr_mode) {
275 case VNIC_DEV_INTR_MODE_MSI:
276 case VNIC_DEV_INTR_MODE_MSIX:
277 mask_on_assertion = 1;
278 break;
279 default:
280 mask_on_assertion = 0;
281 break;
282 }
283
284 for (i = 0; i < enic->intr_count; i++) {
285 vnic_intr_init(&enic->intr[i],
286 enic->config.intr_timer,
287 enic->config.intr_timer_type,
288 mask_on_assertion);
289 }
290
291 /* Clear LIF stats
292 */
293
294 vnic_dev_stats_clear(enic->vdev);
295}
296
297int enic_alloc_vnic_resources(struct enic *enic)
298{
299 enum vnic_dev_intr_mode intr_mode;
300 unsigned int i;
301 int err;
302
303 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
304
305 printk(KERN_INFO PFX "vNIC resources used: "
306 "wq %d rq %d cq %d intr %d intr mode %s\n",
307 enic->wq_count, enic->rq_count,
308 enic->cq_count, enic->intr_count,
309 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
310 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
311 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
312 "unknown"
313 );
314
315 /* Allocate queue resources
316 */
317
318 for (i = 0; i < enic->wq_count; i++) {
319 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
320 enic->config.wq_desc_count,
321 sizeof(struct wq_enet_desc));
322 if (err)
323 goto err_out_cleanup;
324 }
325
326 for (i = 0; i < enic->rq_count; i++) {
327 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
328 enic->config.rq_desc_count,
329 sizeof(struct rq_enet_desc));
330 if (err)
331 goto err_out_cleanup;
332 }
333
334 for (i = 0; i < enic->cq_count; i++) {
335 if (i < enic->rq_count)
336 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
337 enic->config.rq_desc_count,
338 sizeof(struct cq_enet_rq_desc));
339 else
340 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
341 enic->config.wq_desc_count,
342 sizeof(struct cq_enet_wq_desc));
343 if (err)
344 goto err_out_cleanup;
345 }
346
347 for (i = 0; i < enic->intr_count; i++) {
348 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
349 if (err)
350 goto err_out_cleanup;
351 }
352
353 /* Hook remaining resource
354 */
355
356 enic->legacy_pba = vnic_dev_get_res(enic->vdev,
357 RES_TYPE_INTR_PBA_LEGACY, 0);
358 if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
359 printk(KERN_ERR PFX "Failed to hook legacy pba resource\n");
360 err = -ENODEV;
361 goto err_out_cleanup;
362 }
363
364 return 0;
365
366err_out_cleanup:
367 enic_free_vnic_resources(enic);
368
369 return err;
370}
diff --git a/drivers/net/enic/enic_res.h b/drivers/net/enic/enic_res.h
new file mode 100644
index 000000000000..68534a29b7ac
--- /dev/null
+++ b/drivers/net/enic/enic_res.h
@@ -0,0 +1,151 @@
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
20#ifndef _ENIC_RES_H_
21#define _ENIC_RES_H_
22
23#include "wq_enet_desc.h"
24#include "rq_enet_desc.h"
25#include "vnic_wq.h"
26#include "vnic_rq.h"
27
28#define ENIC_MIN_WQ_DESCS 64
29#define ENIC_MAX_WQ_DESCS 4096
30#define ENIC_MIN_RQ_DESCS 64
31#define ENIC_MAX_RQ_DESCS 4096
32
33#define ENIC_MIN_MTU 576 /* minimum for IPv4 */
34#define ENIC_MAX_MTU 9000
35
36#define ENIC_MULTICAST_PERFECT_FILTERS 32
37
38#define ENIC_NON_TSO_MAX_DESC 16
39
40#define ENIC_SETTING(enic, f) ((enic->config.flags & VENETF_##f) ? 1 : 0)
41
42static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq,
43 void *os_buf, dma_addr_t dma_addr, unsigned int len,
44 unsigned int mss_or_csum_offset, unsigned int hdr_len,
45 int vlan_tag_insert, unsigned int vlan_tag,
46 int offload_mode, int cq_entry, int sop, int eop)
47{
48 struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
49
50 wq_enet_desc_enc(desc,
51 (u64)dma_addr | VNIC_PADDR_TARGET,
52 (u16)len,
53 (u16)mss_or_csum_offset,
54 (u16)hdr_len, (u8)offload_mode,
55 (u8)eop, (u8)cq_entry,
56 0, /* fcoe_encap */
57 (u8)vlan_tag_insert,
58 (u16)vlan_tag,
59 0 /* loopback */);
60
61 wmb();
62
63 vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop);
64}
65
66static inline void enic_queue_wq_desc_cont(struct vnic_wq *wq,
67 void *os_buf, dma_addr_t dma_addr, unsigned int len, int eop)
68{
69 enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
70 0, 0, 0, 0, 0,
71 eop, 0 /* !SOP */, eop);
72}
73
74static inline void enic_queue_wq_desc(struct vnic_wq *wq, void *os_buf,
75 dma_addr_t dma_addr, unsigned int len, int vlan_tag_insert,
76 unsigned int vlan_tag, int eop)
77{
78 enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
79 0, 0, vlan_tag_insert, vlan_tag,
80 WQ_ENET_OFFLOAD_MODE_CSUM,
81 eop, 1 /* SOP */, eop);
82}
83
84static inline void enic_queue_wq_desc_csum(struct vnic_wq *wq,
85 void *os_buf, dma_addr_t dma_addr, unsigned int len,
86 int ip_csum, int tcpudp_csum, int vlan_tag_insert,
87 unsigned int vlan_tag, int eop)
88{
89 enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
90 (ip_csum ? 1 : 0) + (tcpudp_csum ? 2 : 0),
91 0, vlan_tag_insert, vlan_tag,
92 WQ_ENET_OFFLOAD_MODE_CSUM,
93 eop, 1 /* SOP */, eop);
94}
95
96static inline void enic_queue_wq_desc_csum_l4(struct vnic_wq *wq,
97 void *os_buf, dma_addr_t dma_addr, unsigned int len,
98 unsigned int csum_offset, unsigned int hdr_len,
99 int vlan_tag_insert, unsigned int vlan_tag, int eop)
100{
101 enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
102 csum_offset, hdr_len, vlan_tag_insert, vlan_tag,
103 WQ_ENET_OFFLOAD_MODE_CSUM_L4,
104 eop, 1 /* SOP */, eop);
105}
106
107static inline void enic_queue_wq_desc_tso(struct vnic_wq *wq,
108 void *os_buf, dma_addr_t dma_addr, unsigned int len,
109 unsigned int mss, unsigned int hdr_len, int vlan_tag_insert,
110 unsigned int vlan_tag, int eop)
111{
112 enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
113 mss, hdr_len, vlan_tag_insert, vlan_tag,
114 WQ_ENET_OFFLOAD_MODE_TSO,
115 eop, 1 /* SOP */, eop);
116}
117
118static inline void enic_queue_rq_desc(struct vnic_rq *rq,
119 void *os_buf, unsigned int os_buf_index,
120 dma_addr_t dma_addr, unsigned int len)
121{
122 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
123 u8 type = os_buf_index ?
124 RQ_ENET_TYPE_NOT_SOP : RQ_ENET_TYPE_ONLY_SOP;
125
126 rq_enet_desc_enc(desc,
127 (u64)dma_addr | VNIC_PADDR_TARGET,
128 type, (u16)len);
129
130 wmb();
131
132 vnic_rq_post(rq, os_buf, os_buf_index, dma_addr, len);
133}
134
135struct enic;
136
137int enic_get_vnic_config(struct enic *);
138void enic_add_station_addr(struct enic *enic);
139void enic_add_multicast_addr(struct enic *enic, u8 *addr);
140void enic_del_multicast_addr(struct enic *enic, u8 *addr);
141void enic_add_vlan(struct enic *enic, u16 vlanid);
142void enic_del_vlan(struct enic *enic, u16 vlanid);
143int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
144 u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
145 u8 ig_vlan_strip_en);
146void enic_get_res_counts(struct enic *enic);
147void enic_init_vnic_resources(struct enic *enic);
148int enic_alloc_vnic_resources(struct enic *);
149void enic_free_vnic_resources(struct enic *);
150
151#endif /* _ENIC_RES_H_ */
diff --git a/drivers/net/enic/rq_enet_desc.h b/drivers/net/enic/rq_enet_desc.h
new file mode 100644
index 000000000000..a06e649010ce
--- /dev/null
+++ b/drivers/net/enic/rq_enet_desc.h
@@ -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
20#ifndef _RQ_ENET_DESC_H_
21#define _RQ_ENET_DESC_H_
22
23/* Ethernet receive queue descriptor: 16B */
24struct rq_enet_desc {
25 __le64 address;
26 __le16 length_type;
27 u8 reserved[6];
28};
29
30enum rq_enet_type_types {
31 RQ_ENET_TYPE_ONLY_SOP = 0,
32 RQ_ENET_TYPE_NOT_SOP = 1,
33 RQ_ENET_TYPE_RESV2 = 2,
34 RQ_ENET_TYPE_RESV3 = 3,
35};
36
37#define RQ_ENET_ADDR_BITS 64
38#define RQ_ENET_LEN_BITS 14
39#define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1)
40#define RQ_ENET_TYPE_BITS 2
41#define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1)
42
43static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
44 u64 address, u8 type, u16 length)
45{
46 desc->address = cpu_to_le64(address);
47 desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
48 ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
49}
50
51static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
52 u64 *address, u8 *type, u16 *length)
53{
54 *address = le64_to_cpu(desc->address);
55 *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
56 *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
57 RQ_ENET_TYPE_MASK);
58}
59
60#endif /* _RQ_ENET_DESC_H_ */
diff --git a/drivers/net/enic/vnic_cq.c b/drivers/net/enic/vnic_cq.c
new file mode 100644
index 000000000000..020ae6c3f3d9
--- /dev/null
+++ b/drivers/net/enic/vnic_cq.c
@@ -0,0 +1,89 @@
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
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/pci.h>
24
25#include "vnic_dev.h"
26#include "vnic_cq.h"
27
28void vnic_cq_free(struct vnic_cq *cq)
29{
30 vnic_dev_free_desc_ring(cq->vdev, &cq->ring);
31
32 cq->ctrl = NULL;
33}
34
35int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
36 unsigned int desc_count, unsigned int desc_size)
37{
38 int err;
39
40 cq->index = index;
41 cq->vdev = vdev;
42
43 cq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_CQ, index);
44 if (!cq->ctrl) {
45 printk(KERN_ERR "Failed to hook CQ[%d] resource\n", index);
46 return -EINVAL;
47 }
48
49 err = vnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size);
50 if (err)
51 return err;
52
53 return 0;
54}
55
56void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
57 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
58 unsigned int cq_tail_color, unsigned int interrupt_enable,
59 unsigned int cq_entry_enable, unsigned int cq_message_enable,
60 unsigned int interrupt_offset, u64 cq_message_addr)
61{
62 u64 paddr;
63
64 paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET;
65 writeq(paddr, &cq->ctrl->ring_base);
66 iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size);
67 iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable);
68 iowrite32(color_enable, &cq->ctrl->color_enable);
69 iowrite32(cq_head, &cq->ctrl->cq_head);
70 iowrite32(cq_tail, &cq->ctrl->cq_tail);
71 iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color);
72 iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable);
73 iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable);
74 iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable);
75 iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset);
76 writeq(cq_message_addr, &cq->ctrl->cq_message_addr);
77}
78
79void vnic_cq_clean(struct vnic_cq *cq)
80{
81 cq->to_clean = 0;
82 cq->last_color = 0;
83
84 iowrite32(0, &cq->ctrl->cq_head);
85 iowrite32(0, &cq->ctrl->cq_tail);
86 iowrite32(1, &cq->ctrl->cq_tail_color);
87
88 vnic_dev_clear_desc_ring(&cq->ring);
89}
diff --git a/drivers/net/enic/vnic_cq.h b/drivers/net/enic/vnic_cq.h
new file mode 100644
index 000000000000..114763cbc2f8
--- /dev/null
+++ b/drivers/net/enic/vnic_cq.h
@@ -0,0 +1,113 @@
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
20#ifndef _VNIC_CQ_H_
21#define _VNIC_CQ_H_
22
23#include "cq_desc.h"
24#include "vnic_dev.h"
25
26/* Completion queue control */
27struct vnic_cq_ctrl {
28 u64 ring_base; /* 0x00 */
29 u32 ring_size; /* 0x08 */
30 u32 pad0;
31 u32 flow_control_enable; /* 0x10 */
32 u32 pad1;
33 u32 color_enable; /* 0x18 */
34 u32 pad2;
35 u32 cq_head; /* 0x20 */
36 u32 pad3;
37 u32 cq_tail; /* 0x28 */
38 u32 pad4;
39 u32 cq_tail_color; /* 0x30 */
40 u32 pad5;
41 u32 interrupt_enable; /* 0x38 */
42 u32 pad6;
43 u32 cq_entry_enable; /* 0x40 */
44 u32 pad7;
45 u32 cq_message_enable; /* 0x48 */
46 u32 pad8;
47 u32 interrupt_offset; /* 0x50 */
48 u32 pad9;
49 u64 cq_message_addr; /* 0x58 */
50 u32 pad10;
51};
52
53struct vnic_cq {
54 unsigned int index;
55 struct vnic_dev *vdev;
56 struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
57 struct vnic_dev_ring ring;
58 unsigned int to_clean;
59 unsigned int last_color;
60};
61
62static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
63 unsigned int work_to_do,
64 int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
65 u8 type, u16 q_number, u16 completed_index, void *opaque),
66 void *opaque)
67{
68 struct cq_desc *cq_desc;
69 unsigned int work_done = 0;
70 u16 q_number, completed_index;
71 u8 type, color;
72
73 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
74 cq->ring.desc_size * cq->to_clean);
75 cq_desc_dec(cq_desc, &type, &color,
76 &q_number, &completed_index);
77
78 while (color != cq->last_color) {
79
80 if ((*q_service)(cq->vdev, cq_desc, type,
81 q_number, completed_index, opaque))
82 break;
83
84 cq->to_clean++;
85 if (cq->to_clean == cq->ring.desc_count) {
86 cq->to_clean = 0;
87 cq->last_color = cq->last_color ? 0 : 1;
88 }
89
90 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
91 cq->ring.desc_size * cq->to_clean);
92 cq_desc_dec(cq_desc, &type, &color,
93 &q_number, &completed_index);
94
95 work_done++;
96 if (work_done >= work_to_do)
97 break;
98 }
99
100 return work_done;
101}
102
103void vnic_cq_free(struct vnic_cq *cq);
104int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
105 unsigned int desc_count, unsigned int desc_size);
106void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
107 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
108 unsigned int cq_tail_color, unsigned int interrupt_enable,
109 unsigned int cq_entry_enable, unsigned int message_enable,
110 unsigned int interrupt_offset, u64 message_addr);
111void vnic_cq_clean(struct vnic_cq *cq);
112
113#endif /* _VNIC_CQ_H_ */
diff --git a/drivers/net/enic/vnic_dev.c b/drivers/net/enic/vnic_dev.c
new file mode 100644
index 000000000000..4d104f5c30f9
--- /dev/null
+++ b/drivers/net/enic/vnic_dev.c
@@ -0,0 +1,674 @@
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
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/pci.h>
24#include <linux/delay.h>
25#include <linux/if_ether.h>
26
27#include "vnic_resource.h"
28#include "vnic_devcmd.h"
29#include "vnic_dev.h"
30#include "vnic_stats.h"
31
32struct vnic_res {
33 void __iomem *vaddr;
34 unsigned int count;
35};
36
37struct vnic_dev {
38 void *priv;
39 struct pci_dev *pdev;
40 struct vnic_res res[RES_TYPE_MAX];
41 enum vnic_dev_intr_mode intr_mode;
42 struct vnic_devcmd __iomem *devcmd;
43 struct vnic_devcmd_notify *notify;
44 struct vnic_devcmd_notify notify_copy;
45 dma_addr_t notify_pa;
46 u32 *linkstatus;
47 dma_addr_t linkstatus_pa;
48 struct vnic_stats *stats;
49 dma_addr_t stats_pa;
50 struct vnic_devcmd_fw_info *fw_info;
51 dma_addr_t fw_info_pa;
52};
53
54#define VNIC_MAX_RES_HDR_SIZE \
55 (sizeof(struct vnic_resource_header) + \
56 sizeof(struct vnic_resource) * RES_TYPE_MAX)
57#define VNIC_RES_STRIDE 128
58
59void *vnic_dev_priv(struct vnic_dev *vdev)
60{
61 return vdev->priv;
62}
63
64static int vnic_dev_discover_res(struct vnic_dev *vdev,
65 struct vnic_dev_bar *bar)
66{
67 struct vnic_resource_header __iomem *rh;
68 struct vnic_resource __iomem *r;
69 u8 type;
70
71 if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
72 printk(KERN_ERR "vNIC BAR0 res hdr length error\n");
73 return -EINVAL;
74 }
75
76 rh = bar->vaddr;
77 if (!rh) {
78 printk(KERN_ERR "vNIC BAR0 res hdr not mem-mapped\n");
79 return -EINVAL;
80 }
81
82 if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
83 ioread32(&rh->version) != VNIC_RES_VERSION) {
84 printk(KERN_ERR "vNIC BAR0 res magic/version error "
85 "exp (%lx/%lx) curr (%x/%x)\n",
86 VNIC_RES_MAGIC, VNIC_RES_VERSION,
87 ioread32(&rh->magic), ioread32(&rh->version));
88 return -EINVAL;
89 }
90
91 r = (struct vnic_resource __iomem *)(rh + 1);
92
93 while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
94
95 u8 bar_num = ioread8(&r->bar);
96 u32 bar_offset = ioread32(&r->bar_offset);
97 u32 count = ioread32(&r->count);
98 u32 len;
99
100 r++;
101
102 if (bar_num != 0) /* only mapping in BAR0 resources */
103 continue;
104
105 switch (type) {
106 case RES_TYPE_WQ:
107 case RES_TYPE_RQ:
108 case RES_TYPE_CQ:
109 case RES_TYPE_INTR_CTRL:
110 /* each count is stride bytes long */
111 len = count * VNIC_RES_STRIDE;
112 if (len + bar_offset > bar->len) {
113 printk(KERN_ERR "vNIC BAR0 resource %d "
114 "out-of-bounds, offset 0x%x + "
115 "size 0x%x > bar len 0x%lx\n",
116 type, bar_offset,
117 len,
118 bar->len);
119 return -EINVAL;
120 }
121 break;
122 case RES_TYPE_INTR_PBA_LEGACY:
123 case RES_TYPE_DEVCMD:
124 len = count;
125 break;
126 default:
127 continue;
128 }
129
130 vdev->res[type].count = count;
131 vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
132 }
133
134 return 0;
135}
136
137unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
138 enum vnic_res_type type)
139{
140 return vdev->res[type].count;
141}
142
143void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
144 unsigned int index)
145{
146 if (!vdev->res[type].vaddr)
147 return NULL;
148
149 switch (type) {
150 case RES_TYPE_WQ:
151 case RES_TYPE_RQ:
152 case RES_TYPE_CQ:
153 case RES_TYPE_INTR_CTRL:
154 return (char __iomem *)vdev->res[type].vaddr +
155 index * VNIC_RES_STRIDE;
156 default:
157 return (char __iomem *)vdev->res[type].vaddr;
158 }
159}
160
161unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
162 unsigned int desc_count, unsigned int desc_size)
163{
164 /* The base address of the desc rings must be 512 byte aligned.
165 * Descriptor count is aligned to groups of 32 descriptors. A
166 * count of 0 means the maximum 4096 descriptors. Descriptor
167 * size is aligned to 16 bytes.
168 */
169
170 unsigned int count_align = 32;
171 unsigned int desc_align = 16;
172
173 ring->base_align = 512;
174
175 if (desc_count == 0)
176 desc_count = 4096;
177
178 ring->desc_count = ALIGN(desc_count, count_align);
179
180 ring->desc_size = ALIGN(desc_size, desc_align);
181
182 ring->size = ring->desc_count * ring->desc_size;
183 ring->size_unaligned = ring->size + ring->base_align;
184
185 return ring->size_unaligned;
186}
187
188void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
189{
190 memset(ring->descs, 0, ring->size);
191}
192
193int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
194 unsigned int desc_count, unsigned int desc_size)
195{
196 vnic_dev_desc_ring_size(ring, desc_count, desc_size);
197
198 ring->descs_unaligned = pci_alloc_consistent(vdev->pdev,
199 ring->size_unaligned,
200 &ring->base_addr_unaligned);
201
202 if (!ring->descs_unaligned) {
203 printk(KERN_ERR
204 "Failed to allocate ring (size=%d), aborting\n",
205 (int)ring->size);
206 return -ENOMEM;
207 }
208
209 ring->base_addr = ALIGN(ring->base_addr_unaligned,
210 ring->base_align);
211 ring->descs = (u8 *)ring->descs_unaligned +
212 (ring->base_addr - ring->base_addr_unaligned);
213
214 vnic_dev_clear_desc_ring(ring);
215
216 ring->desc_avail = ring->desc_count - 1;
217
218 return 0;
219}
220
221void vnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
222{
223 if (ring->descs) {
224 pci_free_consistent(vdev->pdev,
225 ring->size_unaligned,
226 ring->descs_unaligned,
227 ring->base_addr_unaligned);
228 ring->descs = NULL;
229 }
230}
231
232int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
233 u64 *a0, u64 *a1, int wait)
234{
235 struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
236 int delay;
237 u32 status;
238 int dev_cmd_err[] = {
239 /* convert from fw's version of error.h to host's version */
240 0, /* ERR_SUCCESS */
241 EINVAL, /* ERR_EINVAL */
242 EFAULT, /* ERR_EFAULT */
243 EPERM, /* ERR_EPERM */
244 EBUSY, /* ERR_EBUSY */
245 };
246 int err;
247
248 status = ioread32(&devcmd->status);
249 if (status & STAT_BUSY) {
250 printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
251 return -EBUSY;
252 }
253
254 if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
255 writeq(*a0, &devcmd->args[0]);
256 writeq(*a1, &devcmd->args[1]);
257 wmb();
258 }
259
260 iowrite32(cmd, &devcmd->cmd);
261
262 if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
263 return 0;
264
265 for (delay = 0; delay < wait; delay++) {
266
267 udelay(100);
268
269 status = ioread32(&devcmd->status);
270 if (!(status & STAT_BUSY)) {
271
272 if (status & STAT_ERROR) {
273 err = dev_cmd_err[(int)readq(&devcmd->args[0])];
274 printk(KERN_ERR "Error %d devcmd %d\n",
275 err, _CMD_N(cmd));
276 return -err;
277 }
278
279 if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
280 rmb();
281 *a0 = readq(&devcmd->args[0]);
282 *a1 = readq(&devcmd->args[1]);
283 }
284
285 return 0;
286 }
287 }
288
289 printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
290 return -ETIMEDOUT;
291}
292
293int vnic_dev_fw_info(struct vnic_dev *vdev,
294 struct vnic_devcmd_fw_info **fw_info)
295{
296 u64 a0, a1 = 0;
297 int wait = 1000;
298 int err = 0;
299
300 if (!vdev->fw_info) {
301 vdev->fw_info = pci_alloc_consistent(vdev->pdev,
302 sizeof(struct vnic_devcmd_fw_info),
303 &vdev->fw_info_pa);
304 if (!vdev->fw_info)
305 return -ENOMEM;
306
307 a0 = vdev->fw_info_pa;
308
309 /* only get fw_info once and cache it */
310 err = vnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
311 }
312
313 *fw_info = vdev->fw_info;
314
315 return err;
316}
317
318int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
319 void *value)
320{
321 u64 a0, a1;
322 int wait = 1000;
323 int err;
324
325 a0 = offset;
326 a1 = size;
327
328 err = vnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
329
330 switch (size) {
331 case 1: *(u8 *)value = (u8)a0; break;
332 case 2: *(u16 *)value = (u16)a0; break;
333 case 4: *(u32 *)value = (u32)a0; break;
334 case 8: *(u64 *)value = a0; break;
335 default: BUG(); break;
336 }
337
338 return err;
339}
340
341int vnic_dev_stats_clear(struct vnic_dev *vdev)
342{
343 u64 a0 = 0, a1 = 0;
344 int wait = 1000;
345 return vnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
346}
347
348int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
349{
350 u64 a0, a1;
351 int wait = 1000;
352
353 if (!vdev->stats) {
354 vdev->stats = pci_alloc_consistent(vdev->pdev,
355 sizeof(struct vnic_stats), &vdev->stats_pa);
356 if (!vdev->stats)
357 return -ENOMEM;
358 }
359
360 *stats = vdev->stats;
361 a0 = vdev->stats_pa;
362 a1 = sizeof(struct vnic_stats);
363
364 return vnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
365}
366
367int vnic_dev_close(struct vnic_dev *vdev)
368{
369 u64 a0 = 0, a1 = 0;
370 int wait = 1000;
371 return vnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
372}
373
374int vnic_dev_enable(struct vnic_dev *vdev)
375{
376 u64 a0 = 0, a1 = 0;
377 int wait = 1000;
378 return vnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
379}
380
381int vnic_dev_disable(struct vnic_dev *vdev)
382{
383 u64 a0 = 0, a1 = 0;
384 int wait = 1000;
385 return vnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
386}
387
388int vnic_dev_open(struct vnic_dev *vdev, int arg)
389{
390 u64 a0 = (u32)arg, a1 = 0;
391 int wait = 1000;
392 return vnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
393}
394
395int vnic_dev_open_done(struct vnic_dev *vdev, int *done)
396{
397 u64 a0 = 0, a1 = 0;
398 int wait = 1000;
399 int err;
400
401 *done = 0;
402
403 err = vnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
404 if (err)
405 return err;
406
407 *done = (a0 == 0);
408
409 return 0;
410}
411
412int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg)
413{
414 u64 a0 = (u32)arg, a1 = 0;
415 int wait = 1000;
416 return vnic_dev_cmd(vdev, CMD_SOFT_RESET, &a0, &a1, wait);
417}
418
419int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done)
420{
421 u64 a0 = 0, a1 = 0;
422 int wait = 1000;
423 int err;
424
425 *done = 0;
426
427 err = vnic_dev_cmd(vdev, CMD_SOFT_RESET_STATUS, &a0, &a1, wait);
428 if (err)
429 return err;
430
431 *done = (a0 == 0);
432
433 return 0;
434}
435
436int vnic_dev_hang_notify(struct vnic_dev *vdev)
437{
438 u64 a0, a1;
439 int wait = 1000;
440 return vnic_dev_cmd(vdev, CMD_HANG_NOTIFY, &a0, &a1, wait);
441}
442
443int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr)
444{
445 u64 a0, a1;
446 int wait = 1000;
447 int err, i;
448
449 for (i = 0; i < ETH_ALEN; i++)
450 mac_addr[i] = 0;
451
452 err = vnic_dev_cmd(vdev, CMD_MAC_ADDR, &a0, &a1, wait);
453 if (err)
454 return err;
455
456 for (i = 0; i < ETH_ALEN; i++)
457 mac_addr[i] = ((u8 *)&a0)[i];
458
459 return 0;
460}
461
462void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
463 int broadcast, int promisc, int allmulti)
464{
465 u64 a0, a1 = 0;
466 int wait = 1000;
467 int err;
468
469 a0 = (directed ? CMD_PFILTER_DIRECTED : 0) |
470 (multicast ? CMD_PFILTER_MULTICAST : 0) |
471 (broadcast ? CMD_PFILTER_BROADCAST : 0) |
472 (promisc ? CMD_PFILTER_PROMISCUOUS : 0) |
473 (allmulti ? CMD_PFILTER_ALL_MULTICAST : 0);
474
475 err = vnic_dev_cmd(vdev, CMD_PACKET_FILTER, &a0, &a1, wait);
476 if (err)
477 printk(KERN_ERR "Can't set packet filter\n");
478}
479
480void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr)
481{
482 u64 a0 = 0, a1 = 0;
483 int wait = 1000;
484 int err;
485 int i;
486
487 for (i = 0; i < ETH_ALEN; i++)
488 ((u8 *)&a0)[i] = addr[i];
489
490 err = vnic_dev_cmd(vdev, CMD_ADDR_ADD, &a0, &a1, wait);
491 if (err)
492 printk(KERN_ERR
493 "Can't add addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
494 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
495 err);
496}
497
498void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr)
499{
500 u64 a0 = 0, a1 = 0;
501 int wait = 1000;
502 int err;
503 int i;
504
505 for (i = 0; i < ETH_ALEN; i++)
506 ((u8 *)&a0)[i] = addr[i];
507
508 err = vnic_dev_cmd(vdev, CMD_ADDR_DEL, &a0, &a1, wait);
509 if (err)
510 printk(KERN_ERR
511 "Can't del addr [%02x:%02x:%02x:%02x:%02x:%02x], %d\n",
512 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5],
513 err);
514}
515
516int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
517{
518 u64 a0, a1;
519 int wait = 1000;
520
521 if (!vdev->notify) {
522 vdev->notify = pci_alloc_consistent(vdev->pdev,
523 sizeof(struct vnic_devcmd_notify),
524 &vdev->notify_pa);
525 if (!vdev->notify)
526 return -ENOMEM;
527 }
528
529 a0 = vdev->notify_pa;
530 a1 = ((u64)intr << 32) & 0x0000ffff00000000ULL;
531 a1 += sizeof(struct vnic_devcmd_notify);
532
533 return vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
534}
535
536void vnic_dev_notify_unset(struct vnic_dev *vdev)
537{
538 u64 a0, a1;
539 int wait = 1000;
540
541 a0 = 0; /* paddr = 0 to unset notify buffer */
542 a1 = 0x0000ffff00000000ULL; /* intr num = -1 to unreg for intr */
543 a1 += sizeof(struct vnic_devcmd_notify);
544
545 vnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
546}
547
548static int vnic_dev_notify_ready(struct vnic_dev *vdev)
549{
550 u32 *words;
551 unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
552 unsigned int i;
553 u32 csum;
554
555 if (!vdev->notify)
556 return 0;
557
558 do {
559 csum = 0;
560 memcpy(&vdev->notify_copy, vdev->notify,
561 sizeof(struct vnic_devcmd_notify));
562 words = (u32 *)&vdev->notify_copy;
563 for (i = 1; i < nwords; i++)
564 csum += words[i];
565 } while (csum != words[0]);
566
567 return 1;
568}
569
570int vnic_dev_init(struct vnic_dev *vdev, int arg)
571{
572 u64 a0 = (u32)arg, a1 = 0;
573 int wait = 1000;
574 return vnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
575}
576
577int vnic_dev_link_status(struct vnic_dev *vdev)
578{
579 if (vdev->linkstatus)
580 return *vdev->linkstatus;
581
582 if (!vnic_dev_notify_ready(vdev))
583 return 0;
584
585 return vdev->notify_copy.link_state;
586}
587
588u32 vnic_dev_port_speed(struct vnic_dev *vdev)
589{
590 if (!vnic_dev_notify_ready(vdev))
591 return 0;
592
593 return vdev->notify_copy.port_speed;
594}
595
596u32 vnic_dev_msg_lvl(struct vnic_dev *vdev)
597{
598 if (!vnic_dev_notify_ready(vdev))
599 return 0;
600
601 return vdev->notify_copy.msglvl;
602}
603
604u32 vnic_dev_mtu(struct vnic_dev *vdev)
605{
606 if (!vnic_dev_notify_ready(vdev))
607 return 0;
608
609 return vdev->notify_copy.mtu;
610}
611
612void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
613 enum vnic_dev_intr_mode intr_mode)
614{
615 vdev->intr_mode = intr_mode;
616}
617
618enum vnic_dev_intr_mode vnic_dev_get_intr_mode(
619 struct vnic_dev *vdev)
620{
621 return vdev->intr_mode;
622}
623
624void vnic_dev_unregister(struct vnic_dev *vdev)
625{
626 if (vdev) {
627 if (vdev->notify)
628 pci_free_consistent(vdev->pdev,
629 sizeof(struct vnic_devcmd_notify),
630 vdev->notify,
631 vdev->notify_pa);
632 if (vdev->linkstatus)
633 pci_free_consistent(vdev->pdev,
634 sizeof(u32),
635 vdev->linkstatus,
636 vdev->linkstatus_pa);
637 if (vdev->stats)
638 pci_free_consistent(vdev->pdev,
639 sizeof(struct vnic_dev),
640 vdev->stats, vdev->stats_pa);
641 if (vdev->fw_info)
642 pci_free_consistent(vdev->pdev,
643 sizeof(struct vnic_devcmd_fw_info),
644 vdev->fw_info, vdev->fw_info_pa);
645 kfree(vdev);
646 }
647}
648
649struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
650 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar)
651{
652 if (!vdev) {
653 vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
654 if (!vdev)
655 return NULL;
656 }
657
658 vdev->priv = priv;
659 vdev->pdev = pdev;
660
661 if (vnic_dev_discover_res(vdev, bar))
662 goto err_out;
663
664 vdev->devcmd = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD, 0);
665 if (!vdev->devcmd)
666 goto err_out;
667
668 return vdev;
669
670err_out:
671 vnic_dev_unregister(vdev);
672 return NULL;
673}
674
diff --git a/drivers/net/enic/vnic_dev.h b/drivers/net/enic/vnic_dev.h
new file mode 100644
index 000000000000..2dcffd3a24bd
--- /dev/null
+++ b/drivers/net/enic/vnic_dev.h
@@ -0,0 +1,106 @@
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
20#ifndef _VNIC_DEV_H_
21#define _VNIC_DEV_H_
22
23#include "vnic_resource.h"
24#include "vnic_devcmd.h"
25
26#ifndef VNIC_PADDR_TARGET
27#define VNIC_PADDR_TARGET 0x0000000000000000ULL
28#endif
29
30enum vnic_dev_intr_mode {
31 VNIC_DEV_INTR_MODE_UNKNOWN,
32 VNIC_DEV_INTR_MODE_INTX,
33 VNIC_DEV_INTR_MODE_MSI,
34 VNIC_DEV_INTR_MODE_MSIX,
35};
36
37struct vnic_dev_bar {
38 void __iomem *vaddr;
39 dma_addr_t bus_addr;
40 unsigned long len;
41};
42
43struct vnic_dev_ring {
44 void *descs;
45 size_t size;
46 dma_addr_t base_addr;
47 size_t base_align;
48 void *descs_unaligned;
49 size_t size_unaligned;
50 dma_addr_t base_addr_unaligned;
51 unsigned int desc_size;
52 unsigned int desc_count;
53 unsigned int desc_avail;
54};
55
56struct vnic_dev;
57struct vnic_stats;
58
59void *vnic_dev_priv(struct vnic_dev *vdev);
60unsigned int vnic_dev_get_res_count(struct vnic_dev *vdev,
61 enum vnic_res_type type);
62void __iomem *vnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
63 unsigned int index);
64unsigned int vnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
65 unsigned int desc_count, unsigned int desc_size);
66void vnic_dev_clear_desc_ring(struct vnic_dev_ring *ring);
67int vnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
68 unsigned int desc_count, unsigned int desc_size);
69void vnic_dev_free_desc_ring(struct vnic_dev *vdev,
70 struct vnic_dev_ring *ring);
71int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
72 u64 *a0, u64 *a1, int wait);
73int vnic_dev_fw_info(struct vnic_dev *vdev,
74 struct vnic_devcmd_fw_info **fw_info);
75int vnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, unsigned int size,
76 void *value);
77int vnic_dev_stats_clear(struct vnic_dev *vdev);
78int vnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats);
79int vnic_dev_hang_notify(struct vnic_dev *vdev);
80void vnic_dev_packet_filter(struct vnic_dev *vdev, int directed, int multicast,
81 int broadcast, int promisc, int allmulti);
82void vnic_dev_add_addr(struct vnic_dev *vdev, u8 *addr);
83void vnic_dev_del_addr(struct vnic_dev *vdev, u8 *addr);
84int vnic_dev_mac_addr(struct vnic_dev *vdev, u8 *mac_addr);
85int vnic_dev_notify_set(struct vnic_dev *vdev, u16 intr);
86void vnic_dev_notify_unset(struct vnic_dev *vdev);
87int vnic_dev_link_status(struct vnic_dev *vdev);
88u32 vnic_dev_port_speed(struct vnic_dev *vdev);
89u32 vnic_dev_msg_lvl(struct vnic_dev *vdev);
90u32 vnic_dev_mtu(struct vnic_dev *vdev);
91int vnic_dev_close(struct vnic_dev *vdev);
92int vnic_dev_enable(struct vnic_dev *vdev);
93int vnic_dev_disable(struct vnic_dev *vdev);
94int vnic_dev_open(struct vnic_dev *vdev, int arg);
95int vnic_dev_open_done(struct vnic_dev *vdev, int *done);
96int vnic_dev_init(struct vnic_dev *vdev, int arg);
97int vnic_dev_soft_reset(struct vnic_dev *vdev, int arg);
98int vnic_dev_soft_reset_done(struct vnic_dev *vdev, int *done);
99void vnic_dev_set_intr_mode(struct vnic_dev *vdev,
100 enum vnic_dev_intr_mode intr_mode);
101enum vnic_dev_intr_mode vnic_dev_get_intr_mode(struct vnic_dev *vdev);
102void vnic_dev_unregister(struct vnic_dev *vdev);
103struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev,
104 void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar);
105
106#endif /* _VNIC_DEV_H_ */
diff --git a/drivers/net/enic/vnic_devcmd.h b/drivers/net/enic/vnic_devcmd.h
new file mode 100644
index 000000000000..d8617a3373b1
--- /dev/null
+++ b/drivers/net/enic/vnic_devcmd.h
@@ -0,0 +1,282 @@
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
20#ifndef _VNIC_DEVCMD_H_
21#define _VNIC_DEVCMD_H_
22
23#define _CMD_NBITS 14
24#define _CMD_VTYPEBITS 10
25#define _CMD_FLAGSBITS 6
26#define _CMD_DIRBITS 2
27
28#define _CMD_NMASK ((1 << _CMD_NBITS)-1)
29#define _CMD_VTYPEMASK ((1 << _CMD_VTYPEBITS)-1)
30#define _CMD_FLAGSMASK ((1 << _CMD_FLAGSBITS)-1)
31#define _CMD_DIRMASK ((1 << _CMD_DIRBITS)-1)
32
33#define _CMD_NSHIFT 0
34#define _CMD_VTYPESHIFT (_CMD_NSHIFT+_CMD_NBITS)
35#define _CMD_FLAGSSHIFT (_CMD_VTYPESHIFT+_CMD_VTYPEBITS)
36#define _CMD_DIRSHIFT (_CMD_FLAGSSHIFT+_CMD_FLAGSBITS)
37
38/*
39 * Direction bits (from host perspective).
40 */
41#define _CMD_DIR_NONE 0U
42#define _CMD_DIR_WRITE 1U
43#define _CMD_DIR_READ 2U
44#define _CMD_DIR_RW (_CMD_DIR_WRITE | _CMD_DIR_READ)
45
46/*
47 * Flag bits.
48 */
49#define _CMD_FLAGS_NONE 0U
50#define _CMD_FLAGS_NOWAIT 1U
51
52/*
53 * vNIC type bits.
54 */
55#define _CMD_VTYPE_NONE 0U
56#define _CMD_VTYPE_ENET 1U
57#define _CMD_VTYPE_FC 2U
58#define _CMD_VTYPE_SCSI 4U
59#define _CMD_VTYPE_ALL (_CMD_VTYPE_ENET | _CMD_VTYPE_FC | _CMD_VTYPE_SCSI)
60
61/*
62 * Used to create cmds..
63*/
64#define _CMDCF(dir, flags, vtype, nr) \
65 (((dir) << _CMD_DIRSHIFT) | \
66 ((flags) << _CMD_FLAGSSHIFT) | \
67 ((vtype) << _CMD_VTYPESHIFT) | \
68 ((nr) << _CMD_NSHIFT))
69#define _CMDC(dir, vtype, nr) _CMDCF(dir, 0, vtype, nr)
70#define _CMDCNW(dir, vtype, nr) _CMDCF(dir, _CMD_FLAGS_NOWAIT, vtype, nr)
71
72/*
73 * Used to decode cmds..
74*/
75#define _CMD_DIR(cmd) (((cmd) >> _CMD_DIRSHIFT) & _CMD_DIRMASK)
76#define _CMD_FLAGS(cmd) (((cmd) >> _CMD_FLAGSSHIFT) & _CMD_FLAGSMASK)
77#define _CMD_VTYPE(cmd) (((cmd) >> _CMD_VTYPESHIFT) & _CMD_VTYPEMASK)
78#define _CMD_N(cmd) (((cmd) >> _CMD_NSHIFT) & _CMD_NMASK)
79
80enum vnic_devcmd_cmd {
81 CMD_NONE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_NONE, 0),
82
83 /* mcpu fw info in mem: (u64)a0=paddr to struct vnic_devcmd_fw_info */
84 CMD_MCPU_FW_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 1),
85
86 /* dev-specific block member:
87 * in: (u16)a0=offset,(u8)a1=size
88 * out: a0=value */
89 CMD_DEV_SPEC = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 2),
90
91 /* stats clear */
92 CMD_STATS_CLEAR = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 3),
93
94 /* stats dump in mem: (u64)a0=paddr to stats area,
95 * (u16)a1=sizeof stats area */
96 CMD_STATS_DUMP = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 4),
97
98 /* set Rx packet filter: (u32)a0=filters (see CMD_PFILTER_*) */
99 CMD_PACKET_FILTER = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 7),
100
101 /* hang detection notification */
102 CMD_HANG_NOTIFY = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 8),
103
104 /* MAC address in (u48)a0 */
105 CMD_MAC_ADDR = _CMDC(_CMD_DIR_READ,
106 _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 9),
107
108 /* disable/enable promisc mode: (u8)a0=0/1 */
109/***** XXX DEPRECATED *****/
110 CMD_PROMISC_MODE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 10),
111
112 /* disable/enable all-multi mode: (u8)a0=0/1 */
113/***** XXX DEPRECATED *****/
114 CMD_ALLMULTI_MODE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 11),
115
116 /* add addr from (u48)a0 */
117 CMD_ADDR_ADD = _CMDCNW(_CMD_DIR_WRITE,
118 _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 12),
119
120 /* del addr from (u48)a0 */
121 CMD_ADDR_DEL = _CMDCNW(_CMD_DIR_WRITE,
122 _CMD_VTYPE_ENET | _CMD_VTYPE_FC, 13),
123
124 /* add VLAN id in (u16)a0 */
125 CMD_VLAN_ADD = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 14),
126
127 /* del VLAN id in (u16)a0 */
128 CMD_VLAN_DEL = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 15),
129
130 /* nic_cfg in (u32)a0 */
131 CMD_NIC_CFG = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16),
132
133 /* union vnic_rss_key in mem: (u64)a0=paddr, (u16)a1=len */
134 CMD_RSS_KEY = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 17),
135
136 /* union vnic_rss_cpu in mem: (u64)a0=paddr, (u16)a1=len */
137 CMD_RSS_CPU = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 18),
138
139 /* initiate softreset */
140 CMD_SOFT_RESET = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 19),
141
142 /* softreset status:
143 * out: a0=0 reset complete, a0=1 reset in progress */
144 CMD_SOFT_RESET_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 20),
145
146 /* set struct vnic_devcmd_notify buffer in mem:
147 * in:
148 * (u64)a0=paddr to notify (set paddr=0 to unset)
149 * (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify)
150 * (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr)
151 * out:
152 * (u32)a1 = effective size
153 */
154 CMD_NOTIFY = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21),
155
156 /* UNDI API: (u64)a0=paddr to s_PXENV_UNDI_ struct,
157 * (u8)a1=PXENV_UNDI_xxx */
158 CMD_UNDI = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 22),
159
160 /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */
161 CMD_OPEN = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23),
162
163 /* open status:
164 * out: a0=0 open complete, a0=1 open in progress */
165 CMD_OPEN_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24),
166
167 /* close vnic */
168 CMD_CLOSE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25),
169
170 /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */
171 CMD_INIT = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26),
172
173 /* variant of CMD_INIT, with provisioning info
174 * (u64)a0=paddr of vnic_devcmd_provinfo
175 * (u32)a1=sizeof provision info */
176 CMD_INIT_PROV_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 27),
177
178 /* enable virtual link */
179 CMD_ENABLE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28),
180
181 /* disable virtual link */
182 CMD_DISABLE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29),
183
184 /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */
185 CMD_STATS_DUMP_ALL = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30),
186
187 /* init status:
188 * out: a0=0 init complete, a0=1 init in progress
189 * if a0=0, a1=errno */
190 CMD_INIT_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31),
191
192 /* INT13 API: (u64)a0=paddr to vnic_int13_params struct
193 * (u8)a1=INT13_CMD_xxx */
194 CMD_INT13 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_FC, 32),
195
196 /* logical uplink enable/disable: (u64)a0: 0/1=disable/enable */
197 CMD_LOGICAL_UPLINK = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 33),
198
199 /* undo initialize of virtual link */
200 CMD_DEINIT = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34),
201};
202
203/* flags for CMD_OPEN */
204#define CMD_OPENF_OPROM 0x1 /* open coming from option rom */
205
206/* flags for CMD_INIT */
207#define CMD_INITF_DEFAULT_MAC 0x1 /* init with default mac addr */
208
209/* flags for CMD_PACKET_FILTER */
210#define CMD_PFILTER_DIRECTED 0x01
211#define CMD_PFILTER_MULTICAST 0x02
212#define CMD_PFILTER_BROADCAST 0x04
213#define CMD_PFILTER_PROMISCUOUS 0x08
214#define CMD_PFILTER_ALL_MULTICAST 0x10
215
216enum vnic_devcmd_status {
217 STAT_NONE = 0,
218 STAT_BUSY = 1 << 0, /* cmd in progress */
219 STAT_ERROR = 1 << 1, /* last cmd caused error (code in a0) */
220};
221
222enum vnic_devcmd_error {
223 ERR_SUCCESS = 0,
224 ERR_EINVAL = 1,
225 ERR_EFAULT = 2,
226 ERR_EPERM = 3,
227 ERR_EBUSY = 4,
228 ERR_ECMDUNKNOWN = 5,
229 ERR_EBADSTATE = 6,
230 ERR_ENOMEM = 7,
231 ERR_ETIMEDOUT = 8,
232 ERR_ELINKDOWN = 9,
233};
234
235struct vnic_devcmd_fw_info {
236 char fw_version[32];
237 char fw_build[32];
238 char hw_version[32];
239 char hw_serial_number[32];
240};
241
242struct vnic_devcmd_notify {
243 u32 csum; /* checksum over following words */
244
245 u32 link_state; /* link up == 1 */
246 u32 port_speed; /* effective port speed (rate limit) */
247 u32 mtu; /* MTU */
248 u32 msglvl; /* requested driver msg lvl */
249 u32 uif; /* uplink interface */
250 u32 status; /* status bits (see VNIC_STF_*) */
251 u32 error; /* error code (see ERR_*) for first ERR */
252};
253#define VNIC_STF_FATAL_ERR 0x0001 /* fatal fw error */
254
255struct vnic_devcmd_provinfo {
256 u8 oui[3];
257 u8 type;
258 u8 data[0];
259};
260
261/*
262 * Writing cmd register causes STAT_BUSY to get set in status register.
263 * When cmd completes, STAT_BUSY will be cleared.
264 *
265 * If cmd completed successfully STAT_ERROR will be clear
266 * and args registers contain cmd-specific results.
267 *
268 * If cmd error, STAT_ERROR will be set and args[0] contains error code.
269 *
270 * status register is read-only. While STAT_BUSY is set,
271 * all other register contents are read-only.
272 */
273
274/* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */
275#define VNIC_DEVCMD_NARGS 15
276struct vnic_devcmd {
277 u32 status; /* RO */
278 u32 cmd; /* RW */
279 u64 args[VNIC_DEVCMD_NARGS]; /* RW cmd args (little-endian) */
280};
281
282#endif /* _VNIC_DEVCMD_H_ */
diff --git a/drivers/net/enic/vnic_enet.h b/drivers/net/enic/vnic_enet.h
new file mode 100644
index 000000000000..6332ac9391b8
--- /dev/null
+++ b/drivers/net/enic/vnic_enet.h
@@ -0,0 +1,47 @@
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
20#ifndef _VNIC_ENIC_H_
21#define _VNIC_ENIC_H_
22
23/* Device-specific region: enet configuration */
24struct vnic_enet_config {
25 u32 flags;
26 u32 wq_desc_count;
27 u32 rq_desc_count;
28 u16 mtu;
29 u16 intr_timer;
30 u8 intr_timer_type;
31 u8 intr_mode;
32 char devname[16];
33};
34
35#define VENETF_TSO 0x1 /* TSO enabled */
36#define VENETF_LRO 0x2 /* LRO enabled */
37#define VENETF_RXCSUM 0x4 /* RX csum enabled */
38#define VENETF_TXCSUM 0x8 /* TX csum enabled */
39#define VENETF_RSS 0x10 /* RSS enabled */
40#define VENETF_RSSHASH_IPV4 0x20 /* Hash on IPv4 fields */
41#define VENETF_RSSHASH_TCPIPV4 0x40 /* Hash on TCP + IPv4 fields */
42#define VENETF_RSSHASH_IPV6 0x80 /* Hash on IPv6 fields */
43#define VENETF_RSSHASH_TCPIPV6 0x100 /* Hash on TCP + IPv6 fields */
44#define VENETF_RSSHASH_IPV6_EX 0x200 /* Hash on IPv6 extended fields */
45#define VENETF_RSSHASH_TCPIPV6_EX 0x400 /* Hash on TCP + IPv6 ext. fields */
46
47#endif /* _VNIC_ENIC_H_ */
diff --git a/drivers/net/enic/vnic_intr.c b/drivers/net/enic/vnic_intr.c
new file mode 100644
index 000000000000..ddc38f8f4656
--- /dev/null
+++ b/drivers/net/enic/vnic_intr.c
@@ -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 */
19
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/pci.h>
24#include <linux/delay.h>
25
26#include "vnic_dev.h"
27#include "vnic_intr.h"
28
29void vnic_intr_free(struct vnic_intr *intr)
30{
31 intr->ctrl = NULL;
32}
33
34int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
35 unsigned int index)
36{
37 intr->index = index;
38 intr->vdev = vdev;
39
40 intr->ctrl = vnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
41 if (!intr->ctrl) {
42 printk(KERN_ERR "Failed to hook INTR[%d].ctrl resource\n",
43 index);
44 return -EINVAL;
45 }
46
47 return 0;
48}
49
50void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
51 unsigned int coalescing_type, unsigned int mask_on_assertion)
52{
53 iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
54 iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
55 iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
56 iowrite32(0, &intr->ctrl->int_credits);
57}
58
59void vnic_intr_clean(struct vnic_intr *intr)
60{
61 iowrite32(0, &intr->ctrl->int_credits);
62}
diff --git a/drivers/net/enic/vnic_intr.h b/drivers/net/enic/vnic_intr.h
new file mode 100644
index 000000000000..ccc408116af8
--- /dev/null
+++ b/drivers/net/enic/vnic_intr.h
@@ -0,0 +1,92 @@
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
20#ifndef _VNIC_INTR_H_
21#define _VNIC_INTR_H_
22
23#include <linux/pci.h>
24
25#include "vnic_dev.h"
26
27#define VNIC_INTR_TIMER_MAX 0xffff
28
29#define VNIC_INTR_TIMER_TYPE_ABS 0
30#define VNIC_INTR_TIMER_TYPE_QUIET 1
31
32/* Interrupt control */
33struct vnic_intr_ctrl {
34 u32 coalescing_timer; /* 0x00 */
35 u32 pad0;
36 u32 coalescing_value; /* 0x08 */
37 u32 pad1;
38 u32 coalescing_type; /* 0x10 */
39 u32 pad2;
40 u32 mask_on_assertion; /* 0x18 */
41 u32 pad3;
42 u32 mask; /* 0x20 */
43 u32 pad4;
44 u32 int_credits; /* 0x28 */
45 u32 pad5;
46 u32 int_credit_return; /* 0x30 */
47 u32 pad6;
48};
49
50struct vnic_intr {
51 unsigned int index;
52 struct vnic_dev *vdev;
53 struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */
54};
55
56static inline void vnic_intr_unmask(struct vnic_intr *intr)
57{
58 iowrite32(0, &intr->ctrl->mask);
59}
60
61static inline void vnic_intr_mask(struct vnic_intr *intr)
62{
63 iowrite32(1, &intr->ctrl->mask);
64}
65
66static inline void vnic_intr_return_credits(struct vnic_intr *intr,
67 unsigned int credits, int unmask, int reset_timer)
68{
69#define VNIC_INTR_UNMASK_SHIFT 16
70#define VNIC_INTR_RESET_TIMER_SHIFT 17
71
72 u32 int_credit_return = (credits & 0xffff) |
73 (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) |
74 (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0);
75
76 iowrite32(int_credit_return, &intr->ctrl->int_credit_return);
77}
78
79static inline u32 vnic_intr_legacy_pba(u32 __iomem *legacy_pba)
80{
81 /* get and ack interrupt in one read (clear-and-ack-on-read) */
82 return ioread32(legacy_pba);
83}
84
85void vnic_intr_free(struct vnic_intr *intr);
86int vnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
87 unsigned int index);
88void vnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
89 unsigned int coalescing_type, unsigned int mask_on_assertion);
90void vnic_intr_clean(struct vnic_intr *intr);
91
92#endif /* _VNIC_INTR_H_ */
diff --git a/drivers/net/enic/vnic_nic.h b/drivers/net/enic/vnic_nic.h
new file mode 100644
index 000000000000..dadf26fae69a
--- /dev/null
+++ b/drivers/net/enic/vnic_nic.h
@@ -0,0 +1,65 @@
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
20#ifndef _VNIC_NIC_H_
21#define _VNIC_NIC_H_
22
23#define NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD 0xffUL
24#define NIC_CFG_RSS_DEFAULT_CPU_SHIFT 0
25#define NIC_CFG_RSS_HASH_TYPE (0xffUL << 8)
26#define NIC_CFG_RSS_HASH_TYPE_MASK_FIELD 0xffUL
27#define NIC_CFG_RSS_HASH_TYPE_SHIFT 8
28#define NIC_CFG_RSS_HASH_BITS (7UL << 16)
29#define NIC_CFG_RSS_HASH_BITS_MASK_FIELD 7UL
30#define NIC_CFG_RSS_HASH_BITS_SHIFT 16
31#define NIC_CFG_RSS_BASE_CPU (7UL << 19)
32#define NIC_CFG_RSS_BASE_CPU_MASK_FIELD 7UL
33#define NIC_CFG_RSS_BASE_CPU_SHIFT 19
34#define NIC_CFG_RSS_ENABLE (1UL << 22)
35#define NIC_CFG_RSS_ENABLE_MASK_FIELD 1UL
36#define NIC_CFG_RSS_ENABLE_SHIFT 22
37#define NIC_CFG_TSO_IPID_SPLIT_EN (1UL << 23)
38#define NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD 1UL
39#define NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT 23
40#define NIC_CFG_IG_VLAN_STRIP_EN (1UL << 24)
41#define NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD 1UL
42#define NIC_CFG_IG_VLAN_STRIP_EN_SHIFT 24
43
44static inline void vnic_set_nic_cfg(u32 *nic_cfg,
45 u8 rss_default_cpu, u8 rss_hash_type,
46 u8 rss_hash_bits, u8 rss_base_cpu,
47 u8 rss_enable, u8 tso_ipid_split_en,
48 u8 ig_vlan_strip_en)
49{
50 *nic_cfg = (rss_default_cpu & NIC_CFG_RSS_DEFAULT_CPU_MASK_FIELD) |
51 ((rss_hash_type & NIC_CFG_RSS_HASH_TYPE_MASK_FIELD)
52 << NIC_CFG_RSS_HASH_TYPE_SHIFT) |
53 ((rss_hash_bits & NIC_CFG_RSS_HASH_BITS_MASK_FIELD)
54 << NIC_CFG_RSS_HASH_BITS_SHIFT) |
55 ((rss_base_cpu & NIC_CFG_RSS_BASE_CPU_MASK_FIELD)
56 << NIC_CFG_RSS_BASE_CPU_SHIFT) |
57 ((rss_enable & NIC_CFG_RSS_ENABLE_MASK_FIELD)
58 << NIC_CFG_RSS_ENABLE_SHIFT) |
59 ((tso_ipid_split_en & NIC_CFG_TSO_IPID_SPLIT_EN_MASK_FIELD)
60 << NIC_CFG_TSO_IPID_SPLIT_EN_SHIFT) |
61 ((ig_vlan_strip_en & NIC_CFG_IG_VLAN_STRIP_EN_MASK_FIELD)
62 << NIC_CFG_IG_VLAN_STRIP_EN_SHIFT);
63}
64
65#endif /* _VNIC_NIC_H_ */
diff --git a/drivers/net/enic/vnic_resource.h b/drivers/net/enic/vnic_resource.h
new file mode 100644
index 000000000000..144d2812f081
--- /dev/null
+++ b/drivers/net/enic/vnic_resource.h
@@ -0,0 +1,63 @@
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
20#ifndef _VNIC_RESOURCE_H_
21#define _VNIC_RESOURCE_H_
22
23#define VNIC_RES_MAGIC 0x766E6963L /* 'vnic' */
24#define VNIC_RES_VERSION 0x00000000L
25
26/* vNIC resource types */
27enum vnic_res_type {
28 RES_TYPE_EOL, /* End-of-list */
29 RES_TYPE_WQ, /* Work queues */
30 RES_TYPE_RQ, /* Receive queues */
31 RES_TYPE_CQ, /* Completion queues */
32 RES_TYPE_RSVD1,
33 RES_TYPE_NIC_CFG, /* Enet NIC config registers */
34 RES_TYPE_RSVD2,
35 RES_TYPE_RSVD3,
36 RES_TYPE_RSVD4,
37 RES_TYPE_RSVD5,
38 RES_TYPE_INTR_CTRL, /* Interrupt ctrl table */
39 RES_TYPE_INTR_TABLE, /* MSI/MSI-X Interrupt table */
40 RES_TYPE_INTR_PBA, /* MSI/MSI-X PBA table */
41 RES_TYPE_INTR_PBA_LEGACY, /* Legacy intr status, r2c */
42 RES_TYPE_RSVD6,
43 RES_TYPE_RSVD7,
44 RES_TYPE_DEVCMD, /* Device command region */
45 RES_TYPE_PASS_THRU_PAGE, /* Pass-thru page */
46
47 RES_TYPE_MAX, /* Count of resource types */
48};
49
50struct vnic_resource_header {
51 u32 magic;
52 u32 version;
53};
54
55struct vnic_resource {
56 u8 type;
57 u8 bar;
58 u8 pad[2];
59 u32 bar_offset;
60 u32 count;
61};
62
63#endif /* _VNIC_RESOURCE_H_ */
diff --git a/drivers/net/enic/vnic_rq.c b/drivers/net/enic/vnic_rq.c
new file mode 100644
index 000000000000..9365e63e821a
--- /dev/null
+++ b/drivers/net/enic/vnic_rq.c
@@ -0,0 +1,199 @@
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
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/pci.h>
24#include <linux/delay.h>
25
26#include "vnic_dev.h"
27#include "vnic_rq.h"
28
29static int vnic_rq_alloc_bufs(struct vnic_rq *rq)
30{
31 struct vnic_rq_buf *buf;
32 struct vnic_dev *vdev;
33 unsigned int i, j, count = rq->ring.desc_count;
34 unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count);
35
36 vdev = rq->vdev;
37
38 for (i = 0; i < blks; i++) {
39 rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ, GFP_ATOMIC);
40 if (!rq->bufs[i]) {
41 printk(KERN_ERR "Failed to alloc rq_bufs\n");
42 return -ENOMEM;
43 }
44 }
45
46 for (i = 0; i < blks; i++) {
47 buf = rq->bufs[i];
48 for (j = 0; j < VNIC_RQ_BUF_BLK_ENTRIES; j++) {
49 buf->index = i * VNIC_RQ_BUF_BLK_ENTRIES + j;
50 buf->desc = (u8 *)rq->ring.descs +
51 rq->ring.desc_size * buf->index;
52 if (buf->index + 1 == count) {
53 buf->next = rq->bufs[0];
54 break;
55 } else if (j + 1 == VNIC_RQ_BUF_BLK_ENTRIES) {
56 buf->next = rq->bufs[i + 1];
57 } else {
58 buf->next = buf + 1;
59 buf++;
60 }
61 }
62 }
63
64 rq->to_use = rq->to_clean = rq->bufs[0];
65 rq->buf_index = 0;
66
67 return 0;
68}
69
70void vnic_rq_free(struct vnic_rq *rq)
71{
72 struct vnic_dev *vdev;
73 unsigned int i;
74
75 vdev = rq->vdev;
76
77 vnic_dev_free_desc_ring(vdev, &rq->ring);
78
79 for (i = 0; i < VNIC_RQ_BUF_BLKS_MAX; i++) {
80 kfree(rq->bufs[i]);
81 rq->bufs[i] = NULL;
82 }
83
84 rq->ctrl = NULL;
85}
86
87int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
88 unsigned int desc_count, unsigned int desc_size)
89{
90 int err;
91
92 rq->index = index;
93 rq->vdev = vdev;
94
95 rq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_RQ, index);
96 if (!rq->ctrl) {
97 printk(KERN_ERR "Failed to hook RQ[%d] resource\n", index);
98 return -EINVAL;
99 }
100
101 vnic_rq_disable(rq);
102
103 err = vnic_dev_alloc_desc_ring(vdev, &rq->ring, desc_count, desc_size);
104 if (err)
105 return err;
106
107 err = vnic_rq_alloc_bufs(rq);
108 if (err) {
109 vnic_rq_free(rq);
110 return err;
111 }
112
113 return 0;
114}
115
116void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
117 unsigned int error_interrupt_enable,
118 unsigned int error_interrupt_offset)
119{
120 u64 paddr;
121 u32 fetch_index;
122
123 paddr = (u64)rq->ring.base_addr | VNIC_PADDR_TARGET;
124 writeq(paddr, &rq->ctrl->ring_base);
125 iowrite32(rq->ring.desc_count, &rq->ctrl->ring_size);
126 iowrite32(cq_index, &rq->ctrl->cq_index);
127 iowrite32(error_interrupt_enable, &rq->ctrl->error_interrupt_enable);
128 iowrite32(error_interrupt_offset, &rq->ctrl->error_interrupt_offset);
129 iowrite32(0, &rq->ctrl->dropped_packet_count);
130 iowrite32(0, &rq->ctrl->error_status);
131
132 /* Use current fetch_index as the ring starting point */
133 fetch_index = ioread32(&rq->ctrl->fetch_index);
134 rq->to_use = rq->to_clean =
135 &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
136 [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
137 iowrite32(fetch_index, &rq->ctrl->posted_index);
138
139 rq->buf_index = 0;
140}
141
142unsigned int vnic_rq_error_status(struct vnic_rq *rq)
143{
144 return ioread32(&rq->ctrl->error_status);
145}
146
147void vnic_rq_enable(struct vnic_rq *rq)
148{
149 iowrite32(1, &rq->ctrl->enable);
150}
151
152int vnic_rq_disable(struct vnic_rq *rq)
153{
154 unsigned int wait;
155
156 iowrite32(0, &rq->ctrl->enable);
157
158 /* Wait for HW to ACK disable request */
159 for (wait = 0; wait < 100; wait++) {
160 if (!(ioread32(&rq->ctrl->running)))
161 return 0;
162 udelay(1);
163 }
164
165 printk(KERN_ERR "Failed to disable RQ[%d]\n", rq->index);
166
167 return -ETIMEDOUT;
168}
169
170void vnic_rq_clean(struct vnic_rq *rq,
171 void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf))
172{
173 struct vnic_rq_buf *buf;
174 u32 fetch_index;
175
176 BUG_ON(ioread32(&rq->ctrl->enable));
177
178 buf = rq->to_clean;
179
180 while (vnic_rq_desc_used(rq) > 0) {
181
182 (*buf_clean)(rq, buf);
183
184 buf = rq->to_clean = buf->next;
185 rq->ring.desc_avail++;
186 }
187
188 /* Use current fetch_index as the ring starting point */
189 fetch_index = ioread32(&rq->ctrl->fetch_index);
190 rq->to_use = rq->to_clean =
191 &rq->bufs[fetch_index / VNIC_RQ_BUF_BLK_ENTRIES]
192 [fetch_index % VNIC_RQ_BUF_BLK_ENTRIES];
193 iowrite32(fetch_index, &rq->ctrl->posted_index);
194
195 rq->buf_index = 0;
196
197 vnic_dev_clear_desc_ring(&rq->ring);
198}
199
diff --git a/drivers/net/enic/vnic_rq.h b/drivers/net/enic/vnic_rq.h
new file mode 100644
index 000000000000..82bfca67cc4d
--- /dev/null
+++ b/drivers/net/enic/vnic_rq.h
@@ -0,0 +1,204 @@
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
20#ifndef _VNIC_RQ_H_
21#define _VNIC_RQ_H_
22
23#include <linux/pci.h>
24
25#include "vnic_dev.h"
26#include "vnic_cq.h"
27
28/* Receive queue control */
29struct vnic_rq_ctrl {
30 u64 ring_base; /* 0x00 */
31 u32 ring_size; /* 0x08 */
32 u32 pad0;
33 u32 posted_index; /* 0x10 */
34 u32 pad1;
35 u32 cq_index; /* 0x18 */
36 u32 pad2;
37 u32 enable; /* 0x20 */
38 u32 pad3;
39 u32 running; /* 0x28 */
40 u32 pad4;
41 u32 fetch_index; /* 0x30 */
42 u32 pad5;
43 u32 error_interrupt_enable; /* 0x38 */
44 u32 pad6;
45 u32 error_interrupt_offset; /* 0x40 */
46 u32 pad7;
47 u32 error_status; /* 0x48 */
48 u32 pad8;
49 u32 dropped_packet_count; /* 0x50 */
50 u32 pad9;
51 u32 dropped_packet_count_rc; /* 0x58 */
52 u32 pad10;
53};
54
55/* Break the vnic_rq_buf allocations into blocks of 64 entries */
56#define VNIC_RQ_BUF_BLK_ENTRIES 64
57#define VNIC_RQ_BUF_BLK_SZ \
58 (VNIC_RQ_BUF_BLK_ENTRIES * sizeof(struct vnic_rq_buf))
59#define VNIC_RQ_BUF_BLKS_NEEDED(entries) \
60 DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES)
61#define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096)
62
63struct vnic_rq_buf {
64 struct vnic_rq_buf *next;
65 dma_addr_t dma_addr;
66 void *os_buf;
67 unsigned int os_buf_index;
68 unsigned int len;
69 unsigned int index;
70 void *desc;
71};
72
73struct vnic_rq {
74 unsigned int index;
75 struct vnic_dev *vdev;
76 struct vnic_rq_ctrl __iomem *ctrl; /* memory-mapped */
77 struct vnic_dev_ring ring;
78 struct vnic_rq_buf *bufs[VNIC_RQ_BUF_BLKS_MAX];
79 struct vnic_rq_buf *to_use;
80 struct vnic_rq_buf *to_clean;
81 void *os_buf_head;
82 unsigned int buf_index;
83 unsigned int pkts_outstanding;
84};
85
86static inline unsigned int vnic_rq_desc_avail(struct vnic_rq *rq)
87{
88 /* how many does SW own? */
89 return rq->ring.desc_avail;
90}
91
92static inline unsigned int vnic_rq_desc_used(struct vnic_rq *rq)
93{
94 /* how many does HW own? */
95 return rq->ring.desc_count - rq->ring.desc_avail - 1;
96}
97
98static inline void *vnic_rq_next_desc(struct vnic_rq *rq)
99{
100 return rq->to_use->desc;
101}
102
103static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq)
104{
105 return rq->to_use->index;
106}
107
108static inline unsigned int vnic_rq_next_buf_index(struct vnic_rq *rq)
109{
110 return rq->buf_index++;
111}
112
113static inline void vnic_rq_post(struct vnic_rq *rq,
114 void *os_buf, unsigned int os_buf_index,
115 dma_addr_t dma_addr, unsigned int len)
116{
117 struct vnic_rq_buf *buf = rq->to_use;
118
119 buf->os_buf = os_buf;
120 buf->os_buf_index = os_buf_index;
121 buf->dma_addr = dma_addr;
122 buf->len = len;
123
124 buf = buf->next;
125 rq->to_use = buf;
126 rq->ring.desc_avail--;
127
128 /* Move the posted_index every nth descriptor
129 */
130
131#ifndef VNIC_RQ_RETURN_RATE
132#define VNIC_RQ_RETURN_RATE 0xf /* keep 2^n - 1 */
133#endif
134
135 if ((buf->index & VNIC_RQ_RETURN_RATE) == 0)
136 iowrite32(buf->index, &rq->ctrl->posted_index);
137}
138
139static inline void vnic_rq_return_descs(struct vnic_rq *rq, unsigned int count)
140{
141 rq->ring.desc_avail += count;
142}
143
144enum desc_return_options {
145 VNIC_RQ_RETURN_DESC,
146 VNIC_RQ_DEFER_RETURN_DESC,
147};
148
149static inline void vnic_rq_service(struct vnic_rq *rq,
150 struct cq_desc *cq_desc, u16 completed_index,
151 int desc_return, void (*buf_service)(struct vnic_rq *rq,
152 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
153 int skipped, void *opaque), void *opaque)
154{
155 struct vnic_rq_buf *buf;
156 int skipped;
157
158 buf = rq->to_clean;
159 while (1) {
160
161 skipped = (buf->index != completed_index);
162
163 (*buf_service)(rq, cq_desc, buf, skipped, opaque);
164
165 if (desc_return == VNIC_RQ_RETURN_DESC)
166 rq->ring.desc_avail++;
167
168 rq->to_clean = buf->next;
169
170 if (!skipped)
171 break;
172
173 buf = rq->to_clean;
174 }
175}
176
177static inline int vnic_rq_fill(struct vnic_rq *rq,
178 int (*buf_fill)(struct vnic_rq *rq))
179{
180 int err;
181
182 while (vnic_rq_desc_avail(rq) > 1) {
183
184 err = (*buf_fill)(rq);
185 if (err)
186 return err;
187 }
188
189 return 0;
190}
191
192void vnic_rq_free(struct vnic_rq *rq);
193int vnic_rq_alloc(struct vnic_dev *vdev, struct vnic_rq *rq, unsigned int index,
194 unsigned int desc_count, unsigned int desc_size);
195void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index,
196 unsigned int error_interrupt_enable,
197 unsigned int error_interrupt_offset);
198unsigned int vnic_rq_error_status(struct vnic_rq *rq);
199void vnic_rq_enable(struct vnic_rq *rq);
200int vnic_rq_disable(struct vnic_rq *rq);
201void vnic_rq_clean(struct vnic_rq *rq,
202 void (*buf_clean)(struct vnic_rq *rq, struct vnic_rq_buf *buf));
203
204#endif /* _VNIC_RQ_H_ */
diff --git a/drivers/net/enic/vnic_rss.h b/drivers/net/enic/vnic_rss.h
new file mode 100644
index 000000000000..e325d65d7c34
--- /dev/null
+++ b/drivers/net/enic/vnic_rss.h
@@ -0,0 +1,32 @@
1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 */
5
6#ifndef _VNIC_RSS_H_
7#define _VNIC_RSS_H_
8
9/* RSS key array */
10union vnic_rss_key {
11 struct {
12 u8 b[10];
13 u8 b_pad[6];
14 } key[4];
15 u64 raw[8];
16};
17
18/* RSS cpu array */
19union vnic_rss_cpu {
20 struct {
21 u8 b[4] ;
22 u8 b_pad[4];
23 } cpu[32];
24 u64 raw[32];
25};
26
27void vnic_set_rss_key(union vnic_rss_key *rss_key, u8 *key);
28void vnic_set_rss_cpu(union vnic_rss_cpu *rss_cpu, u8 *cpu);
29void vnic_get_rss_key(union vnic_rss_key *rss_key, u8 *key);
30void vnic_get_rss_cpu(union vnic_rss_cpu *rss_cpu, u8 *cpu);
31
32#endif /* _VNIC_RSS_H_ */
diff --git a/drivers/net/enic/vnic_stats.h b/drivers/net/enic/vnic_stats.h
new file mode 100644
index 000000000000..9ff9614d89b1
--- /dev/null
+++ b/drivers/net/enic/vnic_stats.h
@@ -0,0 +1,70 @@
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
20#ifndef _VNIC_STATS_H_
21#define _VNIC_STATS_H_
22
23/* Tx statistics */
24struct vnic_tx_stats {
25 u64 tx_frames_ok;
26 u64 tx_unicast_frames_ok;
27 u64 tx_multicast_frames_ok;
28 u64 tx_broadcast_frames_ok;
29 u64 tx_bytes_ok;
30 u64 tx_unicast_bytes_ok;
31 u64 tx_multicast_bytes_ok;
32 u64 tx_broadcast_bytes_ok;
33 u64 tx_drops;
34 u64 tx_errors;
35 u64 tx_tso;
36 u64 rsvd[16];
37};
38
39/* Rx statistics */
40struct vnic_rx_stats {
41 u64 rx_frames_ok;
42 u64 rx_frames_total;
43 u64 rx_unicast_frames_ok;
44 u64 rx_multicast_frames_ok;
45 u64 rx_broadcast_frames_ok;
46 u64 rx_bytes_ok;
47 u64 rx_unicast_bytes_ok;
48 u64 rx_multicast_bytes_ok;
49 u64 rx_broadcast_bytes_ok;
50 u64 rx_drop;
51 u64 rx_no_bufs;
52 u64 rx_errors;
53 u64 rx_rss;
54 u64 rx_crc_errors;
55 u64 rx_frames_64;
56 u64 rx_frames_127;
57 u64 rx_frames_255;
58 u64 rx_frames_511;
59 u64 rx_frames_1023;
60 u64 rx_frames_1518;
61 u64 rx_frames_to_max;
62 u64 rsvd[16];
63};
64
65struct vnic_stats {
66 struct vnic_tx_stats tx;
67 struct vnic_rx_stats rx;
68};
69
70#endif /* _VNIC_STATS_H_ */
diff --git a/drivers/net/enic/vnic_wq.c b/drivers/net/enic/vnic_wq.c
new file mode 100644
index 000000000000..a576d04708ef
--- /dev/null
+++ b/drivers/net/enic/vnic_wq.c
@@ -0,0 +1,184 @@
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
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/types.h>
23#include <linux/pci.h>
24#include <linux/delay.h>
25
26#include "vnic_dev.h"
27#include "vnic_wq.h"
28
29static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
30{
31 struct vnic_wq_buf *buf;
32 struct vnic_dev *vdev;
33 unsigned int i, j, count = wq->ring.desc_count;
34 unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
35
36 vdev = wq->vdev;
37
38 for (i = 0; i < blks; i++) {
39 wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC);
40 if (!wq->bufs[i]) {
41 printk(KERN_ERR "Failed to alloc wq_bufs\n");
42 return -ENOMEM;
43 }
44 }
45
46 for (i = 0; i < blks; i++) {
47 buf = wq->bufs[i];
48 for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES; j++) {
49 buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES + j;
50 buf->desc = (u8 *)wq->ring.descs +
51 wq->ring.desc_size * buf->index;
52 if (buf->index + 1 == count) {
53 buf->next = wq->bufs[0];
54 break;
55 } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES) {
56 buf->next = wq->bufs[i + 1];
57 } else {
58 buf->next = buf + 1;
59 buf++;
60 }
61 }
62 }
63
64 wq->to_use = wq->to_clean = wq->bufs[0];
65
66 return 0;
67}
68
69void vnic_wq_free(struct vnic_wq *wq)
70{
71 struct vnic_dev *vdev;
72 unsigned int i;
73
74 vdev = wq->vdev;
75
76 vnic_dev_free_desc_ring(vdev, &wq->ring);
77
78 for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
79 kfree(wq->bufs[i]);
80 wq->bufs[i] = NULL;
81 }
82
83 wq->ctrl = NULL;
84}
85
86int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
87 unsigned int desc_count, unsigned int desc_size)
88{
89 int err;
90
91 wq->index = index;
92 wq->vdev = vdev;
93
94 wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index);
95 if (!wq->ctrl) {
96 printk(KERN_ERR "Failed to hook WQ[%d] resource\n", index);
97 return -EINVAL;
98 }
99
100 vnic_wq_disable(wq);
101
102 err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
103 if (err)
104 return err;
105
106 err = vnic_wq_alloc_bufs(wq);
107 if (err) {
108 vnic_wq_free(wq);
109 return err;
110 }
111
112 return 0;
113}
114
115void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
116 unsigned int error_interrupt_enable,
117 unsigned int error_interrupt_offset)
118{
119 u64 paddr;
120
121 paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
122 writeq(paddr, &wq->ctrl->ring_base);
123 iowrite32(wq->ring.desc_count, &wq->ctrl->ring_size);
124 iowrite32(0, &wq->ctrl->fetch_index);
125 iowrite32(0, &wq->ctrl->posted_index);
126 iowrite32(cq_index, &wq->ctrl->cq_index);
127 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
128 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
129 iowrite32(0, &wq->ctrl->error_status);
130}
131
132unsigned int vnic_wq_error_status(struct vnic_wq *wq)
133{
134 return ioread32(&wq->ctrl->error_status);
135}
136
137void vnic_wq_enable(struct vnic_wq *wq)
138{
139 iowrite32(1, &wq->ctrl->enable);
140}
141
142int vnic_wq_disable(struct vnic_wq *wq)
143{
144 unsigned int wait;
145
146 iowrite32(0, &wq->ctrl->enable);
147
148 /* Wait for HW to ACK disable request */
149 for (wait = 0; wait < 100; wait++) {
150 if (!(ioread32(&wq->ctrl->running)))
151 return 0;
152 udelay(1);
153 }
154
155 printk(KERN_ERR "Failed to disable WQ[%d]\n", wq->index);
156
157 return -ETIMEDOUT;
158}
159
160void vnic_wq_clean(struct vnic_wq *wq,
161 void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
162{
163 struct vnic_wq_buf *buf;
164
165 BUG_ON(ioread32(&wq->ctrl->enable));
166
167 buf = wq->to_clean;
168
169 while (vnic_wq_desc_used(wq) > 0) {
170
171 (*buf_clean)(wq, buf);
172
173 buf = wq->to_clean = buf->next;
174 wq->ring.desc_avail++;
175 }
176
177 wq->to_use = wq->to_clean = wq->bufs[0];
178
179 iowrite32(0, &wq->ctrl->fetch_index);
180 iowrite32(0, &wq->ctrl->posted_index);
181 iowrite32(0, &wq->ctrl->error_status);
182
183 vnic_dev_clear_desc_ring(&wq->ring);
184}
diff --git a/drivers/net/enic/vnic_wq.h b/drivers/net/enic/vnic_wq.h
new file mode 100644
index 000000000000..7081828d8a42
--- /dev/null
+++ b/drivers/net/enic/vnic_wq.h
@@ -0,0 +1,154 @@
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
20#ifndef _VNIC_WQ_H_
21#define _VNIC_WQ_H_
22
23#include <linux/pci.h>
24
25#include "vnic_dev.h"
26#include "vnic_cq.h"
27
28/* Work queue control */
29struct vnic_wq_ctrl {
30 u64 ring_base; /* 0x00 */
31 u32 ring_size; /* 0x08 */
32 u32 pad0;
33 u32 posted_index; /* 0x10 */
34 u32 pad1;
35 u32 cq_index; /* 0x18 */
36 u32 pad2;
37 u32 enable; /* 0x20 */
38 u32 pad3;
39 u32 running; /* 0x28 */
40 u32 pad4;
41 u32 fetch_index; /* 0x30 */
42 u32 pad5;
43 u32 dca_value; /* 0x38 */
44 u32 pad6;
45 u32 error_interrupt_enable; /* 0x40 */
46 u32 pad7;
47 u32 error_interrupt_offset; /* 0x48 */
48 u32 pad8;
49 u32 error_status; /* 0x50 */
50 u32 pad9;
51};
52
53struct vnic_wq_buf {
54 struct vnic_wq_buf *next;
55 dma_addr_t dma_addr;
56 void *os_buf;
57 unsigned int len;
58 unsigned int index;
59 int sop;
60 void *desc;
61};
62
63/* Break the vnic_wq_buf allocations into blocks of 64 entries */
64#define VNIC_WQ_BUF_BLK_ENTRIES 64
65#define VNIC_WQ_BUF_BLK_SZ \
66 (VNIC_WQ_BUF_BLK_ENTRIES * sizeof(struct vnic_wq_buf))
67#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \
68 DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES)
69#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096)
70
71struct vnic_wq {
72 unsigned int index;
73 struct vnic_dev *vdev;
74 struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */
75 struct vnic_dev_ring ring;
76 struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX];
77 struct vnic_wq_buf *to_use;
78 struct vnic_wq_buf *to_clean;
79 unsigned int pkts_outstanding;
80};
81
82static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq)
83{
84 /* how many does SW own? */
85 return wq->ring.desc_avail;
86}
87
88static inline unsigned int vnic_wq_desc_used(struct vnic_wq *wq)
89{
90 /* how many does HW own? */
91 return wq->ring.desc_count - wq->ring.desc_avail - 1;
92}
93
94static inline void *vnic_wq_next_desc(struct vnic_wq *wq)
95{
96 return wq->to_use->desc;
97}
98
99static inline void vnic_wq_post(struct vnic_wq *wq,
100 void *os_buf, dma_addr_t dma_addr,
101 unsigned int len, int sop, int eop)
102{
103 struct vnic_wq_buf *buf = wq->to_use;
104
105 buf->sop = sop;
106 buf->os_buf = eop ? os_buf : NULL;
107 buf->dma_addr = dma_addr;
108 buf->len = len;
109
110 buf = buf->next;
111 if (eop)
112 iowrite32(buf->index, &wq->ctrl->posted_index);
113 wq->to_use = buf;
114
115 wq->ring.desc_avail--;
116}
117
118static inline void vnic_wq_service(struct vnic_wq *wq,
119 struct cq_desc *cq_desc, u16 completed_index,
120 void (*buf_service)(struct vnic_wq *wq,
121 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque),
122 void *opaque)
123{
124 struct vnic_wq_buf *buf;
125
126 buf = wq->to_clean;
127 while (1) {
128
129 (*buf_service)(wq, cq_desc, buf, opaque);
130
131 wq->ring.desc_avail++;
132
133 wq->to_clean = buf->next;
134
135 if (buf->index == completed_index)
136 break;
137
138 buf = wq->to_clean;
139 }
140}
141
142void vnic_wq_free(struct vnic_wq *wq);
143int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
144 unsigned int desc_count, unsigned int desc_size);
145void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
146 unsigned int error_interrupt_enable,
147 unsigned int error_interrupt_offset);
148unsigned int vnic_wq_error_status(struct vnic_wq *wq);
149void vnic_wq_enable(struct vnic_wq *wq);
150int vnic_wq_disable(struct vnic_wq *wq);
151void vnic_wq_clean(struct vnic_wq *wq,
152 void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf));
153
154#endif /* _VNIC_WQ_H_ */
diff --git a/drivers/net/enic/wq_enet_desc.h b/drivers/net/enic/wq_enet_desc.h
new file mode 100644
index 000000000000..483596c2d8bf
--- /dev/null
+++ b/drivers/net/enic/wq_enet_desc.h
@@ -0,0 +1,98 @@
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
20#ifndef _WQ_ENET_DESC_H_
21#define _WQ_ENET_DESC_H_
22
23/* Ethernet work queue descriptor: 16B */
24struct wq_enet_desc {
25 __le64 address;
26 __le16 length;
27 __le16 mss_loopback;
28 __le16 header_length_flags;
29 __le16 vlan_tag;
30};
31
32#define WQ_ENET_ADDR_BITS 64
33#define WQ_ENET_LEN_BITS 14
34#define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
35#define WQ_ENET_MSS_BITS 14
36#define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
37#define WQ_ENET_MSS_SHIFT 2
38#define WQ_ENET_LOOPBACK_SHIFT 1
39#define WQ_ENET_HDRLEN_BITS 10
40#define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
41#define WQ_ENET_FLAGS_OM_BITS 2
42#define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
43#define WQ_ENET_FLAGS_EOP_SHIFT 12
44#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
45#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
46#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
47
48#define WQ_ENET_OFFLOAD_MODE_CSUM 0
49#define WQ_ENET_OFFLOAD_MODE_RESERVED 1
50#define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
51#define WQ_ENET_OFFLOAD_MODE_TSO 3
52
53static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
54 u64 address, u16 length, u16 mss, u16 header_length,
55 u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
56 u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
57{
58 desc->address = cpu_to_le64(address);
59 desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
60 desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
61 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
62 desc->header_length_flags = cpu_to_le16(
63 (header_length & WQ_ENET_HDRLEN_MASK) |
64 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
65 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
66 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
67 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
68 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
69 desc->vlan_tag = cpu_to_le16(vlan_tag);
70}
71
72static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
73 u64 *address, u16 *length, u16 *mss, u16 *header_length,
74 u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
75 u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
76{
77 *address = le64_to_cpu(desc->address);
78 *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
79 *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
80 WQ_ENET_MSS_MASK;
81 *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
82 WQ_ENET_LOOPBACK_SHIFT) & 1);
83 *header_length = le16_to_cpu(desc->header_length_flags) &
84 WQ_ENET_HDRLEN_MASK;
85 *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
86 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
87 *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
88 WQ_ENET_FLAGS_EOP_SHIFT) & 1);
89 *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
90 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
91 *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
92 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
93 *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
94 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
95 *vlan_tag = le16_to_cpu(desc->vlan_tag);
96}
97
98#endif /* _WQ_ENET_DESC_H_ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-07 11:15:51 -0500