diff options
Diffstat (limited to 'drivers/scsi/bfa/bfa_cb_ioim.h')
| -rw-r--r-- | drivers/scsi/bfa/bfa_cb_ioim.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/drivers/scsi/bfa/bfa_cb_ioim.h b/drivers/scsi/bfa/bfa_cb_ioim.h new file mode 100644 index 00000000000..a989a94c38d --- /dev/null +++ b/drivers/scsi/bfa/bfa_cb_ioim.h @@ -0,0 +1,169 @@ +/* + * 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__ */ |