snic: driver for Cisco SCSI HBA

Cisco has developed a new PCI HBA interface called sNIC, which stands for
SCSI NIC. This is a new storage feature supported on specialized network
adapter. The new PCI function provides a uniform host interface and abstracts
backend storage.

[jejb: fix up checkpatch errors]
Signed-off-by: Narsimhulu Musini <nmusini@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/drivers/scsi/snic/snic_res.h b/drivers/scsi/snic/snic_res.h
new file mode 100644
index 000000000000..273f72f2a023
--- /dev/null
+++ b/drivers/scsi/snic/snic_res.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2014 Cisco 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 __SNIC_RES_H
+#define __SNIC_RES_H
+
+#include "snic_io.h"
+#include "wq_enet_desc.h"
+#include "vnic_wq.h"
+#include "snic_fwint.h"
+#include "vnic_cq_fw.h"
+
+static inline void
+snic_icmnd_init(struct snic_host_req *req, u32 cmnd_id, u32 host_id, u64 ctx,
+		u16 flags, u64 tgt_id, u8 *lun, u8 *scsi_cdb, u8 cdb_len,
+		u32 data_len, u16 sg_cnt, ulong sgl_addr,
+		dma_addr_t sns_addr_pa, u32 sense_len)
+{
+	snic_io_hdr_enc(&req->hdr, SNIC_REQ_ICMND, 0, cmnd_id, host_id, sg_cnt,
+			ctx);
+
+	req->u.icmnd.flags = cpu_to_le16(flags);
+	req->u.icmnd.tgt_id = cpu_to_le64(tgt_id);
+	memcpy(&req->u.icmnd.lun_id, lun, LUN_ADDR_LEN);
+	req->u.icmnd.cdb_len = cdb_len;
+	memset(req->u.icmnd.cdb, 0, SNIC_CDB_LEN);
+	memcpy(req->u.icmnd.cdb, scsi_cdb, cdb_len);
+	req->u.icmnd.data_len = cpu_to_le32(data_len);
+	req->u.icmnd.sg_addr = cpu_to_le64(sgl_addr);
+	req->u.icmnd.sense_len = cpu_to_le32(sense_len);
+	req->u.icmnd.sense_addr = cpu_to_le64(sns_addr_pa);
+}
+
+static inline void
+snic_itmf_init(struct snic_host_req *req, u32 cmnd_id, u32 host_id, ulong ctx,
+	       u16 flags, u32 req_id, u64 tgt_id, u8 *lun, u8 tm_type)
+{
+	snic_io_hdr_enc(&req->hdr, SNIC_REQ_ITMF, 0, cmnd_id, host_id, 0, ctx);
+
+	req->u.itmf.tm_type = tm_type;
+	req->u.itmf.flags = cpu_to_le16(flags);
+	/* req_id valid only in abort, clear task */
+	req->u.itmf.req_id = cpu_to_le32(req_id);
+	req->u.itmf.tgt_id = cpu_to_le64(tgt_id);
+	memcpy(&req->u.itmf.lun_id, lun, LUN_ADDR_LEN);
+}
+
+static inline void
+snic_queue_wq_eth_desc(struct vnic_wq *wq,
+		       void *os_buf,
+		       dma_addr_t dma_addr,
+		       unsigned int len,
+		       int vlan_tag_insert,
+		       unsigned int vlan_tag,
+		       int cq_entry)
+{
+	struct wq_enet_desc *desc = svnic_wq_next_desc(wq);
+
+	wq_enet_desc_enc(desc,
+			(u64)dma_addr | VNIC_PADDR_TARGET,
+			(u16)len,
+			0, /* mss_or_csum_offset */
+			0, /* fc_eof */
+			0, /* offload mode */
+			1, /* eop */
+			(u8)cq_entry,
+			0, /* fcoe_encap */
+			(u8)vlan_tag_insert,
+			(u16)vlan_tag,
+			0 /* loopback */);
+
+	svnic_wq_post(wq, os_buf, dma_addr, len, 1, 1);
+}
+
+struct snic;
+
+int snic_get_vnic_config(struct snic *);
+int snic_alloc_vnic_res(struct snic *);
+void snic_free_vnic_res(struct snic *);
+void snic_get_res_counts(struct snic *);
+void snic_log_q_error(struct snic *);
+int snic_get_vnic_resources_size(struct snic *);
+#endif /* __SNIC_RES_H */