[SCSI] libiscsi_tcp: support padding offload

cxgb3i does not offload the processing of the header,
but it will always process the padding. This patch
adds a padding offload flag to detect when the LLD
supports this.

The patch also modifies the header processing so that
we do not try to read/bypass the header dugest in the
skb. cxgb3i will not include it with the header like
with other offload cards.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

2 files changed, 4 insertions, 1 deletions

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
index 8e008c96e795..d0ed5226f8c4 100644
--- a/include/scsi/iscsi_if.h
+++ b/include/scsi/iscsi_if.h
@@ -336,6 +336,8 @@ enum iscsi_host_param {
 #define CAP_SENDTARGETS_OFFLOAD 0x400   /* offload discovery process */
 #define CAP_DATA_PATH_OFFLOAD   0x800   /* offload entire IO path */
 #define CAP_DIGEST_OFFLOAD      0x1000  /* offload hdr and data digests */
+#define CAP_PADDING_OFFLOAD     0x2000  /* offload padding insertion, removal,
+                                         and verification */
 
 /*
  * These flags describes reason of stop_conn() call
diff --git a/include/scsi/libiscsi_tcp.h b/include/scsi/libiscsi_tcp.h
index e6bf8ef276bb..83e32f6d7859 100644
--- a/include/scsi/libiscsi_tcp.h
+++ b/include/scsi/libiscsi_tcp.h
@@ -99,7 +99,8 @@ extern int iscsi_tcp_task_xmit(struct iscsi_task *task);
 
 /* segment helpers */
 extern int iscsi_tcp_recv_segment_is_hdr(struct iscsi_tcp_conn *tcp_conn);
-extern int iscsi_tcp_segment_done(struct iscsi_segment *segment, int recv,
+extern int iscsi_tcp_segment_done(struct iscsi_tcp_conn *tcp_conn,
+                                  struct iscsi_segment *segment, int recv,
                                   unsigned copied);
 extern void iscsi_tcp_segment_unmap(struct iscsi_segment *segment);