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 000000000000..093d6524cd42
--- /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 */

diff --git a/drivers/scsi/snic/snic_io.h b/drivers/scsi/snic/snic_io.h new file mode 100644 index 000000000000..093d6524cd42 --- /dev/null +++ b/drivers/scsi/snic/snic_io.h
@@ -0,0 +1,118 @@
	1	/*
	2	* Copyright 2014 Cisco Systems, Inc. All rights reserved.
	3	*
	4	* This program is free software; you may redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; version 2 of the License.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	9	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	10	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	11	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	12	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	13	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	14	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	15	* SOFTWARE.
	16	*/
	17
	18	#ifndef _SNIC_IO_H
	19	#define _SNIC_IO_H
	20
	21	#define SNIC_DFLT_SG_DESC_CNT 32 /* Default descriptors for sgl */
	22	#define SNIC_MAX_SG_DESC_CNT 60 /* Max descriptor for sgl */
	23	#define SNIC_SG_DESC_ALIGN 16 /* Descriptor address alignment */
	24
	25	/* SG descriptor for snic */
	26	struct snic_sg_desc {
	27	__le64 addr;
	28	__le32 len;
	29	u32 _resvd;
	30	};
	31
	32	struct snic_dflt_sgl {
	33	struct snic_sg_desc sg_desc[SNIC_DFLT_SG_DESC_CNT];
	34	};
	35
	36	struct snic_max_sgl {
	37	struct snic_sg_desc sg_desc[SNIC_MAX_SG_DESC_CNT];
	38	};
	39
	40	enum snic_req_cache_type {
	41	SNIC_REQ_CACHE_DFLT_SGL = 0, /* cache with default size sgl */
	42	SNIC_REQ_CACHE_MAX_SGL, /* cache with max size sgl */
	43	SNIC_REQ_TM_CACHE, /* cache for task mgmt reqs contains
	44	snic_host_req objects only*/
	45	SNIC_REQ_MAX_CACHES /* number of sgl caches */
	46	};
	47
	48	/* Per IO internal state */
	49	struct snic_internal_io_state {
	50	char *rqi;
	51	u64 flags;
	52	u32 state;
	53	u32 abts_status; /* Abort completion status */
	54	u32 lr_status; /* device reset completion status */
	55	};
	56
	57	/* IO state machine */
	58	enum snic_ioreq_state {
	59	SNIC_IOREQ_NOT_INITED = 0,
	60	SNIC_IOREQ_PENDING,
	61	SNIC_IOREQ_ABTS_PENDING,
	62	SNIC_IOREQ_ABTS_COMPLETE,
	63	SNIC_IOREQ_LR_PENDING,
	64	SNIC_IOREQ_LR_COMPLETE,
	65	SNIC_IOREQ_COMPLETE,
	66	};
	67
	68	struct snic;
	69	struct snic_host_req;
	70
	71	/*
	72	* snic_req_info : Contains info about IO, one per scsi command.
	73	* Notes: Make sure that the structure is aligned to 16 B
	74	* this helps in easy access to snic_req_info from snic_host_req
	75	*/
	76	struct snic_req_info {
	77	struct list_head list;
	78	struct snic_host_req *req;
	79	u64 start_time; /* start time in jiffies */
	80	u16 rq_pool_type; /* noticion of request pool type */
	81	u16 req_len; /* buf len passing to fw (req + sgl)*/
	82	u32 tgt_id;
	83
	84	u32 tm_tag;
	85	u8 io_cmpl:1; /* sets to 1 when fw completes IO */
	86	u8 resvd[3];
	87	struct scsi_cmnd sc; / Associated scsi cmd */
	88	struct snic snic; / Associated snic */
	89	ulong sge_va; /* Pointer to Resp Buffer */
	90	u64 snsbuf_va;
	91
	92	struct snic_host_req *abort_req;
	93	struct completion *abts_done;
	94
	95	struct snic_host_req *dr_req;
	96	struct completion *dr_done;
	97	};
	98
	99
	100	#define rqi_to_req(rqi) \
	101	((struct snic_host_req ) (((struct snic_req_info )rqi)->req))
	102
	103	#define req_to_rqi(req) \
	104	((struct snic_req_info ) (((struct snic_host_req )req)->hdr.init_ctx))
	105
	106	#define req_to_sgl(req) \
	107	((struct snic_sg_desc ) (((struct snic_host_req )req)+1))
	108
	109	struct snic_req_info *
	110	snic_req_init(struct snic *, int sg_cnt);
	111	void snic_req_free(struct snic , struct snic_req_info );
	112	void snic_calc_io_process_time(struct snic , struct snic_req_info );
	113	void snic_pci_unmap_rsp_buf(struct snic , struct snic_req_info );
	114	struct snic_host_req *
	115	snic_abort_req_init(struct snic , struct snic_req_info );
	116	struct snic_host_req *
	117	snic_dr_req_init(struct snic , struct snic_req_info );
	118	#endif /* _SNIC_IO_H */