diff options
| author | Andrew Vasquez <andrewv@marvell.com> | 2020-02-26 23:40:13 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-02-29 02:32:33 +0100 |
| commit | b0f18eee6fc1ee21c07abb55e9ccabc9ed9c09f0 (patch) | |
| tree | 58163e7f37026ff80962aee942ffeea694c453ba /drivers/scsi/qla2xxx/qla_os.c | |
| parent | scsi: qla2xxx: fix FW resource count values (diff) | |
| download | linux-b0f18eee6fc1ee21c07abb55e9ccabc9ed9c09f0.tar.xz linux-b0f18eee6fc1ee21c07abb55e9ccabc9ed9c09f0.zip | |
scsi: qla2xxx: Update BPM enablement semantics.
commit e4e3a2ce9556 ("scsi: qla2xxx: Add ability to autodetect SFP
type") takes a heavy handed approach to BPM (Buffer Plus Management)
enablement:
1) During hardware initialization, if an LR-capable transceiver is
recognized, the driver schedules a disruptive post-initialization
chip-reset (ISP-ABORT) to allow the BPM settings to be sent to the
firmware. This chip-reset will result in (short-term) path-loss to
all fc-rports and their attached SCSI devices.
2) LR-detection is triggered during any link-up event, resulting in a
refresh and potential chip-reset
Based on firmware-team guidance, upon LR-capable transceiver
recognition, the driver's hardware initialization code will now
re-execute firmware with the new BPM settings, then continue on with
driver initialization. To address the second issue, the driver
performs LR-capable detection upon the driver receiving a
transceiver-insertion asynchronous event from firmware. No short-term
path loss is needed with this new semantic.
Link: https://lore.kernel.org/r/20200226224022.24518-10-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Andrew Vasquez <andrewv@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_os.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_os.c | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index dddb86dc4b81..7db32f983a93 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -3462,13 +3462,6 @@ skip_dpc: if (test_bit(UNLOADING, &base_vha->dpc_flags)) return -ENODEV; - if (ha->flags.detected_lr_sfp) { - ql_log(ql_log_info, base_vha, 0xffff, - "Reset chip to pick up LR SFP setting\n"); - set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); - qla2xxx_wake_dpc(base_vha); - } - return 0; probe_failed: @@ -6881,13 +6874,14 @@ qla2x00_do_dpc(void *data) } if (test_and_clear_bit(DETECT_SFP_CHANGE, - &base_vha->dpc_flags) && - !test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags)) { - qla24xx_detect_sfp(base_vha); - - if (ha->flags.detected_lr_sfp != - ha->flags.using_lr_setting) - set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); + &base_vha->dpc_flags)) { + /* Semantic: + * - NO-OP -- await next ISP-ABORT. Preferred method + * to minimize disruptions that will occur + * when a forced chip-reset occurs. + * - Force -- ISP-ABORT scheduled. + */ + /* set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags); */ } if (test_and_clear_bit |