[net-next-2.6.git] / drivers / scsi / bfa / bfa_cb_ioim.h

/*
 * 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] = cpu_to_be16(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__ */
Commit	Line	Data
7725ccfd	1	/*
a36c61f9	2	* Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
7725ccfd JH	3	* All rights reserved
	4	* www.brocade.com
	5	*
	6	* Linux driver for Brocade Fibre Channel Host Bus Adapter.
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License (GPL) Version 2 as
	10	* published by the Free Software Foundation
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*/
	17
a36c61f9 KG	18	#ifndef __BFA_HCB_IOIM_H__
a36c61f9 KG	19	#define __BFA_HCB_IOIM_H__
7725ccfd	20
a36c61f9	21	#include "bfa_os_inc.h"
7725ccfd JH	22	/*
	23	* task attribute values in FCP-2 FCP_CMND IU
	24	*/
	25	#define SIMPLE_Q 0
	26	#define HEAD_OF_Q 1
	27	#define ORDERED_Q 2
a36c61f9	28	#define ACA_Q 4
7725ccfd JH	29	#define UNTAGGED 5
	30
	31	static inline lun_t
	32	bfad_int_to_lun(u32 luno)
	33	{
	34	union {
a36c61f9 KG	35	u16 scsi_lun[4];
a36c61f9 KG	36	lun_t bfa_lun;
7725ccfd JH	37	} lun;
	38
	39	lun.bfa_lun = 0;
ba816ea8	40	lun.scsi_lun[0] = cpu_to_be16(luno);
7725ccfd	41
f8ceafde	42	return lun.bfa_lun;
7725ccfd JH	43	}
7725ccfd JH	44
acdc79a6	45	/*
7725ccfd JH	46	* Get LUN for the I/O request
	47	*/
	48	#define bfa_cb_ioim_get_lun(__dio) \
	49	bfad_int_to_lun(((struct scsi_cmnd *)__dio)->device->lun)
	50
acdc79a6	51	/*
7725ccfd JH	52	* Get CDB for the I/O request
	53	*/
	54	static inline u8 *
	55	bfa_cb_ioim_get_cdb(struct bfad_ioim_s *dio)
	56	{
	57	struct scsi_cmnd cmnd = (struct scsi_cmnd )dio;
	58
f8ceafde	59	return (u8 *) cmnd->cmnd;
7725ccfd JH	60	}
7725ccfd JH	61
acdc79a6	62	/*
7725ccfd JH	63	* Get I/O direction (read/write) for the I/O request
	64	*/
	65	static inline enum fcp_iodir
	66	bfa_cb_ioim_get_iodir(struct bfad_ioim_s *dio)
	67	{
	68	struct scsi_cmnd cmnd = (struct scsi_cmnd )dio;
	69	enum dma_data_direction dmadir;
	70
	71	dmadir = cmnd->sc_data_direction;
	72	if (dmadir == DMA_TO_DEVICE)
	73	return FCP_IODIR_WRITE;
	74	else if (dmadir == DMA_FROM_DEVICE)
	75	return FCP_IODIR_READ;
	76	else
	77	return FCP_IODIR_NONE;
	78	}
	79
acdc79a6	80	/*
7725ccfd JH	81	* Get IO size in bytes for the I/O request
	82	*/
	83	static inline u32
	84	bfa_cb_ioim_get_size(struct bfad_ioim_s *dio)
	85	{
	86	struct scsi_cmnd cmnd = (struct scsi_cmnd )dio;
	87
f8ceafde	88	return scsi_bufflen(cmnd);
7725ccfd JH	89	}
7725ccfd JH	90
acdc79a6	91	/*
7725ccfd JH	92	* Get timeout for the I/O request
	93	*/
	94	static inline u8
	95	bfa_cb_ioim_get_timeout(struct bfad_ioim_s *dio)
	96	{
	97	struct scsi_cmnd cmnd = (struct scsi_cmnd )dio;
	98	/*
	99	* TBD: need a timeout for scsi passthru
	100	*/
	101	if (cmnd->device->host == NULL)
	102	return 4;
	103
	104	return 0;
	105	}
	106
acdc79a6	107	/*
7725ccfd JH	108	* Get Command Reference Number for the I/O request. 0 if none.
	109	*/
	110	static inline u8
	111	bfa_cb_ioim_get_crn(struct bfad_ioim_s *dio)
	112	{
	113	return 0;
	114	}
	115
acdc79a6	116	/*
7725ccfd JH	117	* Get SAM-3 priority for the I/O request. 0 is default.
	118	*/
	119	static inline u8
	120	bfa_cb_ioim_get_priority(struct bfad_ioim_s *dio)
	121	{
	122	return 0;
	123	}
	124
acdc79a6	125	/*
7725ccfd JH	126	* Get task attributes for the I/O request. Default is FCP_TASK_ATTR_SIMPLE(0).
	127	*/
	128	static inline u8
	129	bfa_cb_ioim_get_taskattr(struct bfad_ioim_s *dio)
	130	{
	131	struct scsi_cmnd cmnd = (struct scsi_cmnd )dio;
a36c61f9	132	u8 task_attr = UNTAGGED;
7725ccfd JH	133
	134	if (cmnd->device->tagged_supported) {
	135	switch (cmnd->tag) {
	136	case HEAD_OF_QUEUE_TAG:
	137	task_attr = HEAD_OF_Q;
	138	break;
	139	case ORDERED_QUEUE_TAG:
	140	task_attr = ORDERED_Q;
	141	break;
	142	default:
	143	task_attr = SIMPLE_Q;
	144	break;
	145	}
	146	}
	147
	148	return task_attr;
	149	}
	150
acdc79a6	151	/*
7725ccfd JH	152	* Get CDB length in bytes for the I/O request. Default is FCP_CMND_CDB_LEN(16).
	153	*/
	154	static inline u8
	155	bfa_cb_ioim_get_cdblen(struct bfad_ioim_s *dio)
	156	{
	157	struct scsi_cmnd cmnd = (struct scsi_cmnd )dio;
	158
f8ceafde	159	return cmnd->cmd_len;
7725ccfd JH	160	}
7725ccfd JH	161
acdc79a6	162	/*
36d345a7 JH	163	* Assign queue to be used for the I/O request. This value depends on whether
	164	* the driver wants to use the queues via any specific algorithm. Currently,
	165	* this is not supported.
	166	*/
	167	#define bfa_cb_ioim_get_reqq(__dio) BFA_FALSE
7725ccfd	168
a36c61f9	169	#endif /* __BFA_HCB_IOIM_H__ */