Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "This is the usual grab bag of driver updates (lpfc, hpsa,
  megaraid_sas, cxgbi, be2iscsi) plus an assortment of minor updates.

  There is also one new driver: the Cisco snic.  The advansys driver has
  been rewritten to get rid of the warning about converting it to the
  DMA API, the tape statistics patch got in and finally, there's a
  resuffle of SCSI header files to separate more cleanly initiator from
  target mode (and better share the common definitions)"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (156 commits)
  snic: driver for Cisco SCSI HBA
  qla2xxx: Fix indentation
  qla2xxx: Comment out unreachable code
  fusion: remove dead MTRR code
  advansys: fix compilation errors and warnings when CONFIG_PCI is not set
  mptsas: fix depth param in scsi_track_queue_full
  megaraid: fix irq setup process regression
  lpfc: Update version to 10.7.0.0 for upstream patch set.
  lpfc: Fix to drop PLOGIs from fabric node till LOGO processing completes
  lpfc: Fix scsi task management error message.
  lpfc: Fix cq_id masking problem.
  lpfc: Fix scsi prep dma buf error.
  lpfc: Add support for using block multi-queue
  lpfc: Devices are not discovered during takeaway/giveback testing
  lpfc: Fix vport deletion failure.
  lpfc: Check for active portpeerbeacon.
  lpfc: Update driver version for upstream patch set 10.6.0.1.
  lpfc: Change buffer pool empty message to miscellaneous category
  lpfc: Fix incorrect log message reported for empty FCF record.
  lpfc: Fix rport leak.
  ...

1 files changed, 118 insertions, 0 deletions

diff --git a/drivers/scsi/snic/snic_io.h b/drivers/scsi/snic/snic_io.h
new file mode 100644
index 0000000..093d652
--- /dev/null
+++ b/drivers/scsi/snic/snic_io.h
@@ -0,0 +1,118 @@
+/*
+ * 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_IO_H
+#define _SNIC_IO_H
+
+#define SNIC_DFLT_SG_DESC_CNT	32	/* Default descriptors for sgl */
+#define SNIC_MAX_SG_DESC_CNT	60	/* Max descriptor for sgl */
+#define SNIC_SG_DESC_ALIGN	16	/* Descriptor address alignment */
+
+/* SG descriptor for snic */
+struct snic_sg_desc {
+	__le64 addr;
+	__le32 len;
+	u32 _resvd;
+};
+
+struct snic_dflt_sgl {
+	struct snic_sg_desc sg_desc[SNIC_DFLT_SG_DESC_CNT];
+};
+
+struct snic_max_sgl {
+	struct snic_sg_desc sg_desc[SNIC_MAX_SG_DESC_CNT];
+};
+
+enum snic_req_cache_type {
+	SNIC_REQ_CACHE_DFLT_SGL = 0,	/* cache with default size sgl */
+	SNIC_REQ_CACHE_MAX_SGL,		/* cache with max size sgl */
+	SNIC_REQ_TM_CACHE,		/* cache for task mgmt reqs contains
+					   snic_host_req objects only*/
+	SNIC_REQ_MAX_CACHES		/* number of sgl caches */
+};
+
+/* Per IO internal state */
+struct snic_internal_io_state {
+	char	*rqi;
+	u64	flags;
+	u32	state;
+	u32	abts_status;	/* Abort completion status */
+	u32	lr_status;	/* device reset completion status */
+};
+
+/* IO state machine */
+enum snic_ioreq_state {
+	SNIC_IOREQ_NOT_INITED = 0,
+	SNIC_IOREQ_PENDING,
+	SNIC_IOREQ_ABTS_PENDING,
+	SNIC_IOREQ_ABTS_COMPLETE,
+	SNIC_IOREQ_LR_PENDING,
+	SNIC_IOREQ_LR_COMPLETE,
+	SNIC_IOREQ_COMPLETE,
+};
+
+struct snic;
+struct snic_host_req;
+
+/*
+ * snic_req_info : Contains info about IO, one per scsi command.
+ * Notes: Make sure that the structure is aligned to 16 B
+ * this helps in easy access to snic_req_info from snic_host_req
+ */
+struct snic_req_info {
+	struct list_head list;
+	struct snic_host_req *req;
+	u64	start_time;		/* start time in jiffies */
+	u16	rq_pool_type;		/* noticion of request pool type */
+	u16	req_len;		/* buf len passing to fw (req + sgl)*/
+	u32	tgt_id;
+
+	u32	tm_tag;
+	u8	io_cmpl:1;		/* sets to 1 when fw completes IO */
+	u8	resvd[3];
+	struct scsi_cmnd *sc;		/* Associated scsi cmd */
+	struct snic	*snic;		/* Associated snic */
+	ulong	sge_va;			/* Pointer to Resp Buffer */
+	u64	snsbuf_va;
+
+	struct snic_host_req *abort_req;
+	struct completion *abts_done;
+
+	struct snic_host_req *dr_req;
+	struct completion *dr_done;
+};
+
+
+#define rqi_to_req(rqi)	\
+	((struct snic_host_req *) (((struct snic_req_info *)rqi)->req))
+
+#define req_to_rqi(req)	\
+	((struct snic_req_info *) (((struct snic_host_req *)req)->hdr.init_ctx))
+
+#define req_to_sgl(req)	\
+	((struct snic_sg_desc *) (((struct snic_host_req *)req)+1))
+
+struct snic_req_info *
+snic_req_init(struct snic *, int sg_cnt);
+void snic_req_free(struct snic *, struct snic_req_info *);
+void snic_calc_io_process_time(struct snic *, struct snic_req_info *);
+void snic_pci_unmap_rsp_buf(struct snic *, struct snic_req_info *);
+struct snic_host_req *
+snic_abort_req_init(struct snic *, struct snic_req_info *);
+struct snic_host_req *
+snic_dr_req_init(struct snic *, struct snic_req_info *);
+#endif /* _SNIC_IO_H */