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scsi: qla2xxx: Disable ATIO interrupt coalesce for quad port ISP27XX

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[ Upstream commit 53661ded24 ]

This partially reverts commit d2b292c3f6 ("scsi: qla2xxx: Enable ATIO
interrupt handshake for ISP27XX")

For some workloads where the host sends a batch of commands and then
pauses, ATIO interrupt coalesce can cause some incoming ATIO entries to be
ignored for extended periods of time, resulting in slow performance,
timeouts, and aborted commands.

Disable interrupt coalesce and re-enable the dedicated ATIO MSI-X
interrupt.

Link: https://lore.kernel.org/r/97dcf365-89ff-014d-a3e5-1404c6af511c@cybernetics.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tony Battersby 2022-07-07 15:08:01 -04:00 committed by Greg Kroah-Hartman
parent 625c78e1ae
commit 8179f0e085
1 changed files with 2 additions and 8 deletions
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10
drivers/scsi/qla2xxx/qla_target.c
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@ -6961,14 +6961,8 @@ qlt_24xx_config_rings(struct scsi_qla_host *vha)
if (ha->flags.msix_enabled) {
if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
if (IS_QLA2071(ha)) {
/* 4 ports Baker: Enable Interrupt Handshake */
icb->msix_atio = 0;
icb->firmware_options_2 |= cpu_to_le32(BIT_26);
} else {
icb->msix_atio = cpu_to_le16(msix->entry);
icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
}
icb->msix_atio = cpu_to_le16(msix->entry);
icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
ql_dbg(ql_dbg_init, vha, 0xf072,
"Registering ICB vector 0x%x for atio que.\n",
msix->entry);