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| author |  Andrew Vasquez <andrewv@marvell.com>
| 2020-02-26 14:40:13 -0800 |
|---|---|---|
| committer |  Martin K. Petersen <martin.petersen@oracle.com>
| 2020-02-28 20:32:33 -0500 |
| commit | b0f18eee6fc1ee21c07abb55e9ccabc9ed9c09f0 (patch) | |
| tree | 58163e7f37026ff80962aee942ffeea694c453ba /drivers/scsi/qla2xxx/qla_fw.h | |
| parent | scsi: qla2xxx: fix FW resource count values (diff) | |
| download | linux-b0f18eee6fc1ee21c07abb55e9ccabc9ed9c09f0.tar.gz linux-b0f18eee6fc1ee21c07abb55e9ccabc9ed9c09f0.tar.bz2 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_fw.h')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_fw.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h index 8af5bc4e2cc6..f9bad5bd7198 100644 --- a/drivers/scsi/qla2xxx/qla_fw.h +++ b/drivers/scsi/qla2xxx/qla_fw.h @@ -1867,9 +1867,8 @@ struct access_chip_rsp_84xx { /* LR Distance bit positions */ #define LR_DIST_NV_POS 2 +#define LR_DIST_NV_MASK 0xf #define LR_DIST_FW_POS 12 -#define LR_DIST_FW_SHIFT (LR_DIST_FW_POS - LR_DIST_NV_POS) -#define LR_DIST_FW_FIELD(x) ((x) << LR_DIST_FW_SHIFT & 0xf000) /* FAC semaphore defines */ #define FAC_SEMAPHORE_UNLOCK 0 |