diff options
| author | Jayamohan Kallickal <jayamohank@gmail.com> | 2013-09-28 15:35:59 -0700 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-10-25 09:58:10 +0100 |
| commit | cf987b7900b8a88661cc984305eb8672b5d6b8f7 (patch) | |
| tree | 8f228c9405eee19350e7b4617244a6de7cf572bb /drivers/scsi/be2iscsi/be_main.c | |
| parent | 3567f36a09d1095bb0fb97aa686f7eabc64b45d9 (diff) | |
[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>
Diffstat (limited to 'drivers/scsi/be2iscsi/be_main.c')
| -rw-r--r-- | drivers/scsi/be2iscsi/be_main.c | 53 |
1 files changed, 50 insertions, 3 deletions
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index d84ecc5317ff..1f375051483a 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -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)); |