From 3e6efab865ac943f4ec43913eb665695737112b0 Mon Sep 17 00:00:00 2001 From: Arun Easi Date: Tue, 29 Sep 2020 03:21:49 -0700 Subject: [PATCH] scsi: qla2xxx: Fix reset of MPI firmware Normally, the MPI firmware is reset when an MPI dump is collected. If an unsaved MPI dump exists in the driver, though, an alternate mechanism is used. This mechanism, which was not fully correct, is not recommended and instead an MPI dump template walk is suggested to perform the MPI reset. To allow for the MPI dump template walk, extra space is reserved in the MPI dump buffer which gets used only when there is already an MPI dump in place. Link: https://lore.kernel.org/r/20200929102152.32278-5-njavali@marvell.com Fixes: cbb01c2f2f63 ("scsi: qla2xxx: Fix MPI failure AEN (8200) handling") Cc: stable@vger.kernel.org Reviewed-by: Himanshu Madhani Signed-off-by: Arun Easi Signed-off-by: Nilesh Javali Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_attr.c | 10 +++++-- drivers/scsi/qla2xxx/qla_gbl.h | 1 - drivers/scsi/qla2xxx/qla_init.c | 2 ++ drivers/scsi/qla2xxx/qla_tmpl.c | 49 +++++++++------------------------ 4 files changed, 23 insertions(+), 39 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c index 1ee747ba4ecc..284b1cc91c80 100644 --- a/drivers/scsi/qla2xxx/qla_attr.c +++ b/drivers/scsi/qla2xxx/qla_attr.c @@ -157,6 +157,14 @@ qla2x00_sysfs_write_fw_dump(struct file *filp, struct kobject *kobj, vha->host_no); } break; + case 10: + if (IS_QLA27XX(ha) || IS_QLA28XX(ha)) { + ql_log(ql_log_info, vha, 0x70e9, + "Issuing MPI firmware dump on host#%ld.\n", + vha->host_no); + ha->isp_ops->mpi_fw_dump(vha, 0); + } + break; } return count; } @@ -744,8 +752,6 @@ qla2x00_sysfs_write_reset(struct file *filp, struct kobject *kobj, qla83xx_idc_audit(vha, IDC_AUDIT_TIMESTAMP); qla83xx_idc_unlock(vha, 0); break; - } else if (IS_QLA27XX(ha) || IS_QLA28XX(ha)) { - qla27xx_reset_mpi(vha); } else { /* Make sure FC side is not in reset */ WARN_ON_ONCE(qla2x00_wait_for_hba_online(vha) != diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h index 9c4d077edf9e..26dc055d93b3 100644 --- a/drivers/scsi/qla2xxx/qla_gbl.h +++ b/drivers/scsi/qla2xxx/qla_gbl.h @@ -945,6 +945,5 @@ extern void qla2x00_dfs_remove_rport(scsi_qla_host_t *vha, struct fc_port *fp); /* nvme.c */ void qla_nvme_unregister_remote_port(struct fc_port *fcport); -void qla27xx_reset_mpi(scsi_qla_host_t *vha); void qla_handle_els_plogi_done(scsi_qla_host_t *vha, struct event_arg *ea); #endif /* _QLA_GBL_H */ diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 6d69ab23a2f3..e1abc1b8de54 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -3298,6 +3298,8 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *vha) j, fwdt->dump_size); dump_size += fwdt->dump_size; } + /* Add space for spare MPI fw dump. */ + dump_size += ha->fwdt[1].dump_size; } else { req_q_size = req->length * sizeof(request_t); rsp_q_size = rsp->length * sizeof(response_t); diff --git a/drivers/scsi/qla2xxx/qla_tmpl.c b/drivers/scsi/qla2xxx/qla_tmpl.c index 591df89a4d13..0af3e7fa31f0 100644 --- a/drivers/scsi/qla2xxx/qla_tmpl.c +++ b/drivers/scsi/qla2xxx/qla_tmpl.c @@ -12,33 +12,6 @@ #define IOBASE(vha) IOBAR(ISPREG(vha)) #define INVALID_ENTRY ((struct qla27xx_fwdt_entry *)0xffffffffffffffffUL) -/* hardware_lock assumed held. */ -static void -qla27xx_write_remote_reg(struct scsi_qla_host *vha, - u32 addr, u32 data) -{ - struct device_reg_24xx __iomem *reg = &vha->hw->iobase->isp24; - - ql_dbg(ql_dbg_misc, vha, 0xd300, - "%s: addr/data = %xh/%xh\n", __func__, addr, data); - - wrt_reg_dword(®->iobase_addr, 0x40); - wrt_reg_dword(®->iobase_c4, data); - wrt_reg_dword(®->iobase_window, addr); -} - -void -qla27xx_reset_mpi(scsi_qla_host_t *vha) -{ - ql_dbg(ql_dbg_misc + ql_dbg_verbose, vha, 0xd301, - "Entered %s.\n", __func__); - - qla27xx_write_remote_reg(vha, 0x104050, 0x40004); - qla27xx_write_remote_reg(vha, 0x10405c, 0x4); - - vha->hw->stat.num_mpi_reset++; -} - static inline void qla27xx_insert16(uint16_t value, void *buf, ulong *len) { @@ -1028,7 +1001,6 @@ void qla27xx_mpi_fwdump(scsi_qla_host_t *vha, int hardware_locked) { ulong flags = 0; - bool need_mpi_reset = true; #ifndef __CHECKER__ if (!hardware_locked) @@ -1036,14 +1008,20 @@ qla27xx_mpi_fwdump(scsi_qla_host_t *vha, int hardware_locked) #endif if (!vha->hw->mpi_fw_dump) { ql_log(ql_log_warn, vha, 0x02f3, "-> mpi_fwdump no buffer\n"); - } else if (vha->hw->mpi_fw_dumped) { - ql_log(ql_log_warn, vha, 0x02f4, - "-> MPI firmware already dumped (%p) -- ignoring request\n", - vha->hw->mpi_fw_dump); } else { struct fwdt *fwdt = &vha->hw->fwdt[1]; ulong len; void *buf = vha->hw->mpi_fw_dump; + bool walk_template_only = false; + + if (vha->hw->mpi_fw_dumped) { + /* Use the spare area for any further dumps. */ + buf += fwdt->dump_size; + walk_template_only = true; + ql_log(ql_log_warn, vha, 0x02f4, + "-> MPI firmware already dumped -- dump saving to temporary buffer %p.\n", + buf); + } ql_log(ql_log_warn, vha, 0x02f5, "-> fwdt1 running...\n"); if (!fwdt->template) { @@ -1058,9 +1036,10 @@ qla27xx_mpi_fwdump(scsi_qla_host_t *vha, int hardware_locked) ql_log(ql_log_warn, vha, 0x02f7, "-> fwdt1 fwdump residual=%+ld\n", fwdt->dump_size - len); - } else { - need_mpi_reset = false; } + vha->hw->stat.num_mpi_reset++; + if (walk_template_only) + goto bailout; vha->hw->mpi_fw_dump_len = len; vha->hw->mpi_fw_dumped = 1; @@ -1072,8 +1051,6 @@ qla27xx_mpi_fwdump(scsi_qla_host_t *vha, int hardware_locked) } bailout: - if (need_mpi_reset) - qla27xx_reset_mpi(vha); #ifndef __CHECKER__ if (!hardware_locked) spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); -- 2.34.1