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/*
* Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*
* Linux driver for Brocade Fibre Channel Host Bus Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef __BFA_HCB_IOIM_H__
#define __BFA_HCB_IOIM_H__
#include "bfa_os_inc.h"
/*
* task attribute values in FCP-2 FCP_CMND IU
*/
#define SIMPLE_Q 0
#define HEAD_OF_Q 1
#define ORDERED_Q 2
#define ACA_Q 4
#define UNTAGGED 5
static inline lun_t
bfad_int_to_lun(u32 luno)
{
union {
u16 scsi_lun[4];
lun_t bfa_lun;
} lun;
lun.bfa_lun = 0;
lun.scsi_lun[0] = bfa_os_htons(luno);
return lun.bfa_lun;
}
/**
* Get LUN for the I/O request
*/
#define bfa_cb_ioim_get_lun(__dio) \
bfad_int_to_lun(((struct scsi_cmnd *)__dio)->device->lun)
/**
* Get CDB for the I/O request
*/
static inline u8 *
bfa_cb_ioim_get_cdb(struct bfad_ioim_s *dio)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
return (u8 *) cmnd->cmnd;
}
/**
* Get I/O direction (read/write) for the I/O request
*/
static inline enum fcp_iodir
bfa_cb_ioim_get_iodir(struct bfad_ioim_s *dio)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
enum dma_data_direction dmadir;
dmadir = cmnd->sc_data_direction;
if (dmadir == DMA_TO_DEVICE)
return FCP_IODIR_WRITE;
else if (dmadir == DMA_FROM_DEVICE)
return FCP_IODIR_READ;
else
return FCP_IODIR_NONE;
}
/**
* Get IO size in bytes for the I/O request
*/
static inline u32
bfa_cb_ioim_get_size(struct bfad_ioim_s *dio)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
return scsi_bufflen(cmnd);
}
/**
* Get timeout for the I/O request
*/
static inline u8
bfa_cb_ioim_get_timeout(struct bfad_ioim_s *dio)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
/*
* TBD: need a timeout for scsi passthru
*/
if (cmnd->device->host == NULL)
return 4;
return 0;
}
/**
* Get Command Reference Number for the I/O request. 0 if none.
*/
static inline u8
bfa_cb_ioim_get_crn(struct bfad_ioim_s *dio)
{
return 0;
}
/**
* Get SAM-3 priority for the I/O request. 0 is default.
*/
static inline u8
bfa_cb_ioim_get_priority(struct bfad_ioim_s *dio)
{
return 0;
}
/**
* Get task attributes for the I/O request. Default is FCP_TASK_ATTR_SIMPLE(0).
*/
static inline u8
bfa_cb_ioim_get_taskattr(struct bfad_ioim_s *dio)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
u8 task_attr = UNTAGGED;
if (cmnd->device->tagged_supported) {
switch (cmnd->tag) {
case HEAD_OF_QUEUE_TAG:
task_attr = HEAD_OF_Q;
break;
case ORDERED_QUEUE_TAG:
task_attr = ORDERED_Q;
break;
default:
task_attr = SIMPLE_Q;
break;
}
}
return task_attr;
}
/**
* Get CDB length in bytes for the I/O request. Default is FCP_CMND_CDB_LEN(16).
*/
static inline u8
bfa_cb_ioim_get_cdblen(struct bfad_ioim_s *dio)
{
struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
return cmnd->cmd_len;
}
/**
* Assign queue to be used for the I/O request. This value depends on whether
* the driver wants to use the queues via any specific algorithm. Currently,
* this is not supported.
*/
#define bfa_cb_ioim_get_reqq(__dio) BFA_FALSE
#endif /* __BFA_HCB_IOIM_H__ */
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