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[SCSI] cxgb3i: added per-task data to track transmit progress

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added per-task struct cxgb3i_task_data to track the data transmiting
progress and the state of the pdus to be transmitted.

Signed-off-by: Karen Xie <kxie@chelsio.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Karen Xie 2009-02-13 21:38:49 -08:00 committed by James Bottomley
parent 1648b11ea7
commit 949847d195
2 changed files with 24 additions and 2 deletions
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21
drivers/scsi/cxgb3i/cxgb3i.h
View file

@ -20,6 +20,7 @@
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/scatterlist.h>
#include <linux/skbuff.h>
#include <scsi/libiscsi_tcp.h>
/* from cxgb3 LLD */
@ -113,6 +114,26 @@ struct cxgb3i_endpoint {
struct cxgb3i_conn *cconn;
};
/**
* struct cxgb3i_task_data - private iscsi task data
*
* @nr_frags: # of coalesced page frags (from scsi sgl)
* @frags: coalesced page frags (from scsi sgl)
* @skb: tx pdu skb
* @offset: data offset for the next pdu
* @count: max. possible pdu payload
* @sgoffset: offset to the first sg entry for a given offset
*/
#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)
struct cxgb3i_task_data {
unsigned short nr_frags;
skb_frag_t frags[MAX_PDU_FRAGS];
struct sk_buff *skb;
unsigned int offset;
unsigned int count;
unsigned int sgoffset;
};
int cxgb3i_iscsi_init(void);
void cxgb3i_iscsi_cleanup(void);

5
drivers/scsi/cxgb3i/cxgb3i_iscsi.c
View file

@ -364,7 +364,8 @@ cxgb3i_session_create(struct iscsi_endpoint *ep, u16 cmds_max, u16 qdepth,
cls_session = iscsi_session_setup(&cxgb3i_iscsi_transport, shost,
cmds_max,
sizeof(struct iscsi_tcp_task),
sizeof(struct iscsi_tcp_task) +
sizeof(struct cxgb3i_task_data),
initial_cmdsn, ISCSI_MAX_TARGET);
if (!cls_session)
return NULL;
@ -844,7 +845,7 @@ static struct scsi_host_template cxgb3i_host_template = {
.proc_name = "cxgb3i",
.queuecommand = iscsi_queuecommand,
.change_queue_depth = iscsi_change_queue_depth,
.can_queue = 128 * (ISCSI_DEF_XMIT_CMDS_MAX - 1),
.can_queue = CXGB3I_SCSI_QDEPTH_DFLT - 1,
.sg_tablesize = SG_ALL,
.max_sectors = 0xFFFF,
.cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,