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- /*
- * Copyright (c) 2005-2009 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.
- */
- /**
- * bfa_cb_ioim_macros.h BFA IOIM driver interface macros.
- */
- #ifndef __BFA_HCB_IOIM_MACROS_H__
- #define __BFA_HCB_IOIM_MACROS_H__
- #include <bfa_os_inc.h>
- /*
- * #include <linux/dma-mapping.h>
- *
- * #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include
- * <scsi/scsi_device.h> #include <scsi/scsi_host.h>
- */
- #include "bfad_im_compat.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 SG element for the I/O request given the SG element index
- */
- static inline union bfi_addr_u
- bfa_cb_ioim_get_sgaddr(struct bfad_ioim_s *dio, int sgeid)
- {
- struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
- struct scatterlist *sge;
- u64 addr;
- sge = (struct scatterlist *)scsi_sglist(cmnd) + sgeid;
- addr = (u64) sg_dma_address(sge);
- return *((union bfi_addr_u *) &addr);
- }
- static inline u32
- bfa_cb_ioim_get_sglen(struct bfad_ioim_s *dio, int sgeid)
- {
- struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
- struct scatterlist *sge;
- u32 len;
- sge = (struct scatterlist *)scsi_sglist(cmnd) + sgeid;
- len = sg_dma_len(sge);
- return len;
- }
- /**
- * 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;
- }
- #endif /* __BFA_HCB_IOIM_MACROS_H__ */
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