Merge tag 'v2.6.37' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / scsi / bfa / bfa_cb_ioim.h

diff --git a/drivers/scsi/bfa/bfa_cb_ioim.h b/drivers/scsi/bfa/bfa_cb_ioim.h
new file mode 100644 (file)
index 0000000..6f02101
--- /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] = 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__ */