drivers/scsi/fnic/fnic_io.h

   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 #ifndef _FNIC_IO_H_
  19 #define _FNIC_IO_H_
  20
  21 #include <scsi/fc/fc_fcp.h>
  22
  23 #define FNIC_DFLT_SG_DESC_CNT  32
  24 #define FNIC_MAX_SG_DESC_CNT        256     /* Maximum descriptors per sgl */
  25 #define FNIC_SG_DESC_ALIGN          16      /* Descriptor address alignment */
  26
  27 struct host_sg_desc {
  28         __le64 addr;
  29         __le32 len;
  30         u32 _resvd;
  31 };
  32
  33 struct fnic_dflt_sgl_list {
  34         struct host_sg_desc sg_desc[FNIC_DFLT_SG_DESC_CNT];
  35 };
  36
  37 struct fnic_sgl_list {
  38         struct host_sg_desc sg_desc[FNIC_MAX_SG_DESC_CNT];
  39 };
  40
  41 enum fnic_sgl_list_type {
  42         FNIC_SGL_CACHE_DFLT = 0,  /* cache with default size sgl */
  43         FNIC_SGL_CACHE_MAX,       /* cache with max size sgl */
  44         FNIC_SGL_NUM_CACHES       /* number of sgl caches */
  45 };
  46
  47 enum fnic_ioreq_state {
  48         FNIC_IOREQ_NOT_INITED = 0,
  49         FNIC_IOREQ_CMD_PENDING,
  50         FNIC_IOREQ_ABTS_PENDING,
  51         FNIC_IOREQ_ABTS_COMPLETE,
  52         FNIC_IOREQ_CMD_COMPLETE,
  53 };
  54
  55 struct fnic_io_req {
  56         struct host_sg_desc *sgl_list; /* sgl list */
  57         void *sgl_list_alloc; /* sgl list address used for free */
  58         dma_addr_t sense_buf_pa; /* dma address for sense buffer*/
  59         dma_addr_t sgl_list_pa; /* dma address for sgl list */
  60         u16 sgl_cnt;
  61         u8 sgl_type; /* device DMA descriptor list type */
  62         u8 io_completed:1; /* set to 1 when fw completes IO */
  63         u32 port_id; /* remote port DID */
  64         unsigned long start_time; /* in jiffies */
  65         struct completion *abts_done; /* completion for abts */
  66         struct completion *dr_done; /* completion for device reset */
  67 };
  68
  69 #endif /* _FNIC_IO_H_ */