36d345a703
Add new bfa functionality to support dynamic queue selection (IO redirection). IO redirection can only be enabled when QoS is disabled. Signed-off-by: Jing Huang <huangj@brocade.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
181 lines
3.8 KiB
C
181 lines
3.8 KiB
C
/*
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* Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*
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* Linux driver for Brocade Fibre Channel Host Bus Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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/**
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* bfa_cb_ioim_macros.h BFA IOIM driver interface macros.
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*/
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#ifndef __BFA_HCB_IOIM_MACROS_H__
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#define __BFA_HCB_IOIM_MACROS_H__
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#include <bfa_os_inc.h>
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/*
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* #include <linux/dma-mapping.h>
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*
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* #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include
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* <scsi/scsi_device.h> #include <scsi/scsi_host.h>
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*/
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#include "bfad_im_compat.h"
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/*
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* task attribute values in FCP-2 FCP_CMND IU
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*/
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#define SIMPLE_Q 0
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#define HEAD_OF_Q 1
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#define ORDERED_Q 2
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#define ACA_Q 4
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#define UNTAGGED 5
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static inline lun_t
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bfad_int_to_lun(u32 luno)
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{
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union {
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u16 scsi_lun[4];
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lun_t bfa_lun;
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} lun;
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lun.bfa_lun = 0;
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lun.scsi_lun[0] = bfa_os_htons(luno);
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return lun.bfa_lun;
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}
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/**
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* Get LUN for the I/O request
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*/
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#define bfa_cb_ioim_get_lun(__dio) \
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bfad_int_to_lun(((struct scsi_cmnd *)__dio)->device->lun)
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/**
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* Get CDB for the I/O request
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*/
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static inline u8 *
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bfa_cb_ioim_get_cdb(struct bfad_ioim_s *dio)
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{
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struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
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return (u8 *) cmnd->cmnd;
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}
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/**
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* Get I/O direction (read/write) for the I/O request
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*/
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static inline enum fcp_iodir
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bfa_cb_ioim_get_iodir(struct bfad_ioim_s *dio)
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{
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struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
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enum dma_data_direction dmadir;
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dmadir = cmnd->sc_data_direction;
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if (dmadir == DMA_TO_DEVICE)
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return FCP_IODIR_WRITE;
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else if (dmadir == DMA_FROM_DEVICE)
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return FCP_IODIR_READ;
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else
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return FCP_IODIR_NONE;
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}
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/**
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* Get IO size in bytes for the I/O request
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*/
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static inline u32
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bfa_cb_ioim_get_size(struct bfad_ioim_s *dio)
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{
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struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
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return scsi_bufflen(cmnd);
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}
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/**
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* Get timeout for the I/O request
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*/
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static inline u8
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bfa_cb_ioim_get_timeout(struct bfad_ioim_s *dio)
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{
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struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
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/*
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* TBD: need a timeout for scsi passthru
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*/
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if (cmnd->device->host == NULL)
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return 4;
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return 0;
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}
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/**
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* Get Command Reference Number for the I/O request. 0 if none.
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*/
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static inline u8
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bfa_cb_ioim_get_crn(struct bfad_ioim_s *dio)
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{
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return 0;
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}
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/**
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* Get SAM-3 priority for the I/O request. 0 is default.
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*/
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static inline u8
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bfa_cb_ioim_get_priority(struct bfad_ioim_s *dio)
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{
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return 0;
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}
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/**
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* Get task attributes for the I/O request. Default is FCP_TASK_ATTR_SIMPLE(0).
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*/
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static inline u8
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bfa_cb_ioim_get_taskattr(struct bfad_ioim_s *dio)
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{
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struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
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u8 task_attr = UNTAGGED;
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if (cmnd->device->tagged_supported) {
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switch (cmnd->tag) {
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case HEAD_OF_QUEUE_TAG:
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task_attr = HEAD_OF_Q;
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break;
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case ORDERED_QUEUE_TAG:
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task_attr = ORDERED_Q;
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break;
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default:
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task_attr = SIMPLE_Q;
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break;
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}
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}
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return task_attr;
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}
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/**
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* Get CDB length in bytes for the I/O request. Default is FCP_CMND_CDB_LEN(16).
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*/
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static inline u8
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bfa_cb_ioim_get_cdblen(struct bfad_ioim_s *dio)
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{
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struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
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return cmnd->cmd_len;
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}
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/**
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* Assign queue to be used for the I/O request. This value depends on whether
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* the driver wants to use the queues via any specific algorithm. Currently,
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* this is not supported.
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*/
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#define bfa_cb_ioim_get_reqq(__dio) BFA_FALSE
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#endif /* __BFA_HCB_IOIM_MACROS_H__ */
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