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[SCSI] be2iscsi: Fix SGL posting for unaligned ICD values 

If certain configuration it is possible that ICD range is not page-aligned.
SGL posting failed in these configuration and driver load was not success.
This fix aligns ICD range values and SGL posting for IO is done.

Signed-off-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Jayamohan Kallickal 2013-09-28 15:35:59 -07:00 committed by James Bottomley
parent 3567f36a09
commit cf987b7900
2 changed files with 58 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
drivers/scsi/be2iscsi/be_main.c
View File

@ -729,13 +729,60 @@ static void beiscsi_get_params(struct beiscsi_hba *phba)
total_cid_count = BEISCSI_GET_CID_COUNT(phba, BEISCSI_ULP0) +
BEISCSI_GET_CID_COUNT(phba, BEISCSI_ULP1);
for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++)
for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
uint32_t align_mask = 0;
uint32_t icd_post_per_page = 0;
uint32_t icd_count_unavailable = 0;
uint32_t icd_start = 0, icd_count = 0;
uint32_t icd_start_align = 0, icd_count_align = 0;
if (test_bit(ulp_num, &phba->fw_config.ulp_supported)) {
total_icd_count = phba->fw_config.
iscsi_icd_count[ulp_num];
icd_start = phba->fw_config.iscsi_icd_start[ulp_num];
icd_count = phba->fw_config.iscsi_icd_count[ulp_num];
/* Get ICD count that can be posted on each page */
icd_post_per_page = (PAGE_SIZE / (BE2_SGE *
sizeof(struct iscsi_sge)));
align_mask = (icd_post_per_page - 1);
/* Check if icd_start is aligned ICD per page posting */
if (icd_start % icd_post_per_page) {
icd_start_align = ((icd_start +
icd_post_per_page) &
~(align_mask));
phba->fw_config.
iscsi_icd_start[ulp_num] =
icd_start_align;
}
icd_count_align = (icd_count & ~align_mask);
/* ICD discarded in the process of alignment */
if (icd_start_align)
icd_count_unavailable = ((icd_start_align -
icd_start) +
(icd_count -
icd_count_align));
/* Updated ICD count available */
phba->fw_config.iscsi_icd_count[ulp_num] = (icd_count -
icd_count_unavailable);
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
"BM_%d : Aligned ICD values\n"
"\t ICD Start : %d\n"
"\t ICD Count : %d\n"
"\t ICD Discarded : %d\n",
phba->fw_config.
iscsi_icd_start[ulp_num],
phba->fw_config.
iscsi_icd_count[ulp_num],
icd_count_unavailable);
break;
}
}
total_icd_count = phba->fw_config.iscsi_icd_count[ulp_num];
phba->params.ios_per_ctrl = (total_icd_count -
(total_cid_count +
BE2_TMFS + BE2_NOPOUT_REQ));

10
drivers/scsi/be2iscsi/be_mgmt.c
View File

@ -350,12 +350,18 @@ int mgmt_get_fw_config(struct be_ctrl_info *ctrl,
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_INIT,
"BG_%d : Function loaded on ULP : %d\n"
"\tiscsi_cid_count : %d\n"
"\t iscsi_icd_count : %d\n",
"\tiscsi_cid_start : %d\n"
"\t iscsi_icd_count : %d\n"
"\t iscsi_icd_start : %d\n",
ulp_num,
phba->fw_config.
iscsi_cid_count[ulp_num],
phba->fw_config.
iscsi_icd_count[ulp_num]);
iscsi_cid_start[ulp_num],
phba->fw_config.
iscsi_icd_count[ulp_num],
phba->fw_config.
iscsi_icd_start[ulp_num]);
}
}