[SCSI] libfc: add support of large receive offload by ddp in fc_fcp
When LLD supports direct data placement (ddp) for large receive of an scsi
i/o coming into fc_fcp, we call into libfc_function_template's ddp_setup()
to prepare for a ddp of large receive for this read I/O. When I/O is complete,
we call the corresponding ddp_done() to get the length of data ddped as well
as to let LLD do clean up.
fc_fcp_ddp_setup()/fc_fcp_ddp_done() are added to setup and complete a ddped
read I/O described by the given fc_fcp_pkt. They would call into corresponding
ddp_setup/ddp_done implemented by the fcoe layer. Eventually, fcoe layer calls
into LLD's ddp_setup/ddp_done provided through net_device
Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h
index 04d34a7..5951105 100644
--- a/include/scsi/fc_frame.h
+++ b/include/scsi/fc_frame.h
@@ -54,8 +54,7 @@
#define fr_eof(fp) (fr_cb(fp)->fr_eof)
#define fr_flags(fp) (fr_cb(fp)->fr_flags)
#define fr_max_payload(fp) (fr_cb(fp)->fr_max_payload)
-#define fr_cmd(fp) (fr_cb(fp)->fr_cmd)
-#define fr_dir(fp) (fr_cmd(fp)->sc_data_direction)
+#define fr_fsp(fp) (fr_cb(fp)->fr_fsp)
#define fr_crc(fp) (fr_cb(fp)->fr_crc)
struct fc_frame {
@@ -66,7 +65,7 @@
struct packet_type *ptype;
struct fc_lport *fr_dev; /* transport layer private pointer */
struct fc_seq *fr_seq; /* for use with exchange manager */
- struct scsi_cmnd *fr_cmd; /* for use of scsi command */
+ struct fc_fcp_pkt *fr_fsp; /* for the corresponding fcp I/O */
u32 fr_crc;
u16 fr_max_payload; /* max FC payload */
enum fc_sof fr_sof; /* start of frame delimiter */
@@ -218,20 +217,6 @@
return fc_frame_rctl(fp) == FC_RCTL_DD_UNSOL_CMD;
}
-static inline bool fc_frame_is_read(const struct fc_frame *fp)
-{
- if (fc_frame_is_cmd(fp) && fr_cmd(fp))
- return fr_dir(fp) == DMA_FROM_DEVICE;
- return false;
-}
-
-static inline bool fc_frame_is_write(const struct fc_frame *fp)
-{
- if (fc_frame_is_cmd(fp) && fr_cmd(fp))
- return fr_dir(fp) == DMA_TO_DEVICE;
- return false;
-}
-
/*
* Check for leaks.
* Print the frame header of any currently allocated frame, assuming there