[PATCH 12/14] qla2xxx: Changes to support kdump kernel for NVMe BFS
From: Nilesh Javali <njavali@marvell.com>
Date: 2021-08-05 10:25:26
Subsystem:
qlogic qla2xxx fc-scsi driver, scsi subsystem, the rest · Maintainers:
Nilesh Javali, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
From: Saurav Kashyap <skashyap@marvell.com>
The MSI-X and MSI calls fails in kdump kernel, because of this
qla2xxx_create_qpair fails leading to .create_queue callback failure.
The fix is to return existing qpair instead of allocating new one and
allocate single hw queue.
[ 19.975838] qla2xxx [0000:d8:00.1]-00c7:11: MSI-X: Failed to enable support,
giving up -- 16/-28.
[ 19.984885] qla2xxx [0000:d8:00.1]-0037:11: Falling back-to MSI mode --
ret=-28.
[ 19.992278] qla2xxx [0000:d8:00.1]-0039:11: Falling back-to INTa mode --
ret=-28.
..
..
..
[ 21.141518] qla2xxx [0000:d8:00.0]-2104:2: qla_nvme_alloc_queue: handle
00000000e7ee499d, idx =1, qsize 32
[ 21.151166] qla2xxx [0000:d8:00.0]-0181:2: FW/Driver is not multi-queue capable.
[ 21.158558] qla2xxx [0000:d8:00.0]-2122:2: Failed to allocate qpair
[ 21.164824] nvme nvme0: NVME-FC{0}: reset: Reconnect attempt failed (-22)
[ 21.171612] nvme nvme0: NVME-FC{0}: Reconnect attempt in 2 seconds
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
---
drivers/scsi/qla2xxx/qla_def.h | 1 -
drivers/scsi/qla2xxx/qla_isr.c | 2 ++
drivers/scsi/qla2xxx/qla_nvme.c | 40 +++++++++++++++------------------
3 files changed, 20 insertions(+), 23 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 60702d066ed9..55175e8a0749 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h@@ -4022,7 +4022,6 @@ struct qla_hw_data { /* Enabled in Driver */ uint32_t scm_enabled:1; uint32_t edif_enabled:1; - uint32_t max_req_queue_warned:1; uint32_t plogi_template_valid:1; uint32_t port_isolated:1; } flags;
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index b0b5af21781a..ba4a5bf5600a 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c@@ -4508,6 +4508,8 @@ qla2x00_request_irqs(struct qla_hw_data *ha, struct rsp_que *rsp) ql_dbg(ql_dbg_init, vha, 0x0125, "INTa mode: Enabled.\n"); ha->flags.mr_intr_valid = 1; + /* Set max_qpair to 0, as MSI-X and MSI in not enabled */ + ha->max_qpairs = 0; } clear_risc_ints:
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 6f3c0a506509..94e350ef3028 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c@@ -108,19 +108,24 @@ static int qla_nvme_alloc_queue(struct nvme_fc_local_port *lport, return -EINVAL; } - if (ha->queue_pair_map[qidx]) { - *handle = ha->queue_pair_map[qidx]; - ql_log(ql_log_info, vha, 0x2121, - "Returning existing qpair of %px for idx=%x\n", - *handle, qidx); - return 0; - } + /* Use base qpair if max_qpairs is 0 */ + if (!ha->max_qpairs) { + qpair = ha->base_qpair; + } else { + if (ha->queue_pair_map[qidx]) { + *handle = ha->queue_pair_map[qidx]; + ql_log(ql_log_info, vha, 0x2121, + "Returning existing qpair of %px for idx=%x\n", + *handle, qidx); + return 0; + } - qpair = qla2xxx_create_qpair(vha, 5, vha->vp_idx, true); - if (qpair == NULL) { - ql_log(ql_log_warn, vha, 0x2122, - "Failed to allocate qpair\n"); - return -EINVAL; + qpair = qla2xxx_create_qpair(vha, 5, vha->vp_idx, true); + if (!qpair) { + ql_log(ql_log_warn, vha, 0x2122, + "Failed to allocate qpair\n"); + return -EINVAL; + } } *handle = qpair;
@@ -731,18 +736,9 @@ int qla_nvme_register_hba(struct scsi_qla_host *vha) WARN_ON(vha->nvme_local_port); - if (ha->max_req_queues < 3) { - if (!ha->flags.max_req_queue_warned) - ql_log(ql_log_info, vha, 0x2120, - "%s: Disabling FC-NVME due to lack of free queue pairs (%d).\n", - __func__, ha->max_req_queues); - ha->flags.max_req_queue_warned = 1; - return ret; - } - qla_nvme_fc_transport.max_hw_queues = min((uint8_t)(qla_nvme_fc_transport.max_hw_queues), - (uint8_t)(ha->max_req_queues - 2)); + (uint8_t)(ha->max_qpairs ? ha->max_qpairs : 1)); pinfo.node_name = wwn_to_u64(vha->node_name); pinfo.port_name = wwn_to_u64(vha->port_name);
--
2.19.0.rc0