[SCSI] fnic: Add new Cisco PCI-Express FCoE HBA

fnic is a driver for the Cisco PCI-Express FCoE HBA

Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/drivers/scsi/fnic/wq_enet_desc.h b/drivers/scsi/fnic/wq_enet_desc.h
new file mode 100644
index 000000000000..b121cbad18b8
--- /dev/null
+++ b/drivers/scsi/fnic/wq_enet_desc.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _WQ_ENET_DESC_H_
+#define _WQ_ENET_DESC_H_
+
+/* Ethernet work queue descriptor: 16B */
+struct wq_enet_desc {
+        __le64 address;
+        __le16 length;
+        __le16 mss_loopback;
+        __le16 header_length_flags;
+        __le16 vlan_tag;
+};
+
+#define WQ_ENET_ADDR_BITS               64
+#define WQ_ENET_LEN_BITS                14
+#define WQ_ENET_LEN_MASK                ((1 << WQ_ENET_LEN_BITS) - 1)
+#define WQ_ENET_MSS_BITS                14
+#define WQ_ENET_MSS_MASK                ((1 << WQ_ENET_MSS_BITS) - 1)
+#define WQ_ENET_MSS_SHIFT               2
+#define WQ_ENET_LOOPBACK_SHIFT          1
+#define WQ_ENET_HDRLEN_BITS             10
+#define WQ_ENET_HDRLEN_MASK             ((1 << WQ_ENET_HDRLEN_BITS) - 1)
+#define WQ_ENET_FLAGS_OM_BITS           2
+#define WQ_ENET_FLAGS_OM_MASK           ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
+#define WQ_ENET_FLAGS_EOP_SHIFT         12
+#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT    13
+#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT  14
+#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT     15
+
+#define WQ_ENET_OFFLOAD_MODE_CSUM       0
+#define WQ_ENET_OFFLOAD_MODE_RESERVED   1
+#define WQ_ENET_OFFLOAD_MODE_CSUM_L4    2
+#define WQ_ENET_OFFLOAD_MODE_TSO        3
+
+static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
+        u64 address, u16 length, u16 mss, u16 header_length,
+        u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
+        u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
+{
+        desc->address = cpu_to_le64(address);
+        desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
+        desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
+                WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
+        desc->header_length_flags = cpu_to_le16(
+                (header_length & WQ_ENET_HDRLEN_MASK) |
+                (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
+                (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
+                (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
+                (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
+                (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
+        desc->vlan_tag = cpu_to_le16(vlan_tag);
+}
+
+static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
+        u64 *address, u16 *length, u16 *mss, u16 *header_length,
+        u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
+        u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
+{
+        *address = le64_to_cpu(desc->address);
+        *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
+        *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
+                WQ_ENET_MSS_MASK;
+        *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
+                WQ_ENET_LOOPBACK_SHIFT) & 1);
+        *header_length = le16_to_cpu(desc->header_length_flags) &
+                WQ_ENET_HDRLEN_MASK;
+        *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
+                WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
+        *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
+                WQ_ENET_FLAGS_EOP_SHIFT) & 1);
+        *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
+                WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
+        *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
+                WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
+        *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
+                WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
+        *vlan_tag = le16_to_cpu(desc->vlan_tag);
+}
+
+#endif /* _WQ_ENET_DESC_H_ */