From 8bfc149ba24cb985d593c0b2ddcf03ce42febe0c Mon Sep 17 00:00:00 2001 From: Arun Easi Date: Fri, 26 Aug 2022 03:25:57 -0700 Subject: [PATCH] scsi: qla2xxx: Enhance driver tracing with separate tunable and more Older tracing of driver messages was to: - log only debug messages to kernel main trace buffer; and - log only if extended logging bits corresponding to this message is off This has been modified and extended as follows: - Tracing is now controlled via ql2xextended_error_logging_ktrace module parameter. Bit usages same as ql2xextended_error_logging. - Tracing uses "qla2xxx" trace instance, unless instance creation have issues. - Tracing is enabled (compile time tunable). - All driver messages, include debug and log messages are now traced in kernel trace buffer. Trace messages can be viewed by looking at the qla2xxx instance at: /sys/kernel/tracing/instances/qla2xxx/trace Trace tunable that takes the same bit mask as ql2xextended_error_logging is: ql2xextended_error_logging_ktrace (default=1) Link: https://lore.kernel.org/r/20220826102559.17474-6-njavali@marvell.com Suggested-by: Daniel Wagner Suggested-by: Steven Rostedt Tested-by: Himanshu Madhani Reviewed-by: Himanshu Madhani Reviewed-by: Daniel Wagner Signed-off-by: Arun Easi Signed-off-by: Nilesh Javali Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_dbg.c | 50 ++++++++++++++++++++++++---------- drivers/scsi/qla2xxx/qla_dbg.h | 43 +++++++++++++++++++++++++++++ drivers/scsi/qla2xxx/qla_gbl.h | 1 + drivers/scsi/qla2xxx/qla_os.c | 35 ++++++++++++++++++++++++ 4 files changed, 115 insertions(+), 14 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c index 7cf1f78cbaee..d7e8454304ce 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.c +++ b/drivers/scsi/qla2xxx/qla_dbg.c @@ -2455,7 +2455,7 @@ qla83xx_fw_dump(scsi_qla_host_t *vha) /****************************************************************************/ /* Write the debug message prefix into @pbuf. */ -static void ql_dbg_prefix(char *pbuf, int pbuf_size, +static void ql_dbg_prefix(char *pbuf, int pbuf_size, struct pci_dev *pdev, const scsi_qla_host_t *vha, uint msg_id) { if (vha) { @@ -2464,6 +2464,9 @@ static void ql_dbg_prefix(char *pbuf, int pbuf_size, /* []-:: */ snprintf(pbuf, pbuf_size, "%s [%s]-%04x:%lu: ", QL_MSGHDR, dev_name(&(pdev->dev)), msg_id, vha->host_no); + } else if (pdev) { + snprintf(pbuf, pbuf_size, "%s [%s]-%04x: : ", QL_MSGHDR, + dev_name(&pdev->dev), msg_id); } else { /* []-: : */ snprintf(pbuf, pbuf_size, "%s [%s]-%04x: : ", QL_MSGHDR, @@ -2491,20 +2494,20 @@ ql_dbg(uint level, scsi_qla_host_t *vha, uint id, const char *fmt, ...) struct va_format vaf; char pbuf[64]; - if (!ql_mask_match(level) && !trace_ql_dbg_log_enabled()) + ql_ktrace(1, level, pbuf, NULL, vha, id, fmt); + + if (!ql_mask_match(level)) return; + if (!pbuf[0]) /* set by ql_ktrace */ + ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), NULL, vha, id); + va_start(va, fmt); vaf.fmt = fmt; vaf.va = &va; - ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), vha, id); - - if (!ql_mask_match(level)) - trace_ql_dbg_log(pbuf, &vaf); - else - pr_warn("%s%pV", pbuf, &vaf); + pr_warn("%s%pV", pbuf, &vaf); va_end(va); @@ -2533,6 +2536,9 @@ ql_dbg_pci(uint level, struct pci_dev *pdev, uint id, const char *fmt, ...) if (pdev == NULL) return; + + ql_ktrace(1, level, pbuf, pdev, NULL, id, fmt); + if (!ql_mask_match(level)) return; @@ -2541,7 +2547,9 @@ ql_dbg_pci(uint level, struct pci_dev *pdev, uint id, const char *fmt, ...) vaf.fmt = fmt; vaf.va = &va; - ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), NULL, id + ql_dbg_offset); + if (!pbuf[0]) /* set by ql_ktrace */ + ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), pdev, NULL, + id + ql_dbg_offset); pr_warn("%s%pV", pbuf, &vaf); va_end(va); @@ -2570,7 +2578,10 @@ ql_log(uint level, scsi_qla_host_t *vha, uint id, const char *fmt, ...) if (level > ql_errlev) return; - ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), vha, id); + ql_ktrace(0, level, pbuf, NULL, vha, id, fmt); + + if (!pbuf[0]) /* set by ql_ktrace */ + ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), NULL, vha, id); va_start(va, fmt); @@ -2621,7 +2632,10 @@ ql_log_pci(uint level, struct pci_dev *pdev, uint id, const char *fmt, ...) if (level > ql_errlev) return; - ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), NULL, id); + ql_ktrace(0, level, pbuf, pdev, NULL, id, fmt); + + if (!pbuf[0]) /* set by ql_ktrace */ + ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), pdev, NULL, id); va_start(va, fmt); @@ -2716,7 +2730,11 @@ ql_log_qp(uint32_t level, struct qla_qpair *qpair, int32_t id, if (level > ql_errlev) return; - ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), qpair ? qpair->vha : NULL, id); + ql_ktrace(0, level, pbuf, NULL, qpair ? qpair->vha : NULL, id, fmt); + + if (!pbuf[0]) /* set by ql_ktrace */ + ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), NULL, + qpair ? qpair->vha : NULL, id); va_start(va, fmt); @@ -2762,6 +2780,8 @@ ql_dbg_qp(uint32_t level, struct qla_qpair *qpair, int32_t id, struct va_format vaf; char pbuf[128]; + ql_ktrace(1, level, pbuf, NULL, qpair ? qpair->vha : NULL, id, fmt); + if (!ql_mask_match(level)) return; @@ -2770,8 +2790,10 @@ ql_dbg_qp(uint32_t level, struct qla_qpair *qpair, int32_t id, vaf.fmt = fmt; vaf.va = &va; - ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), qpair ? qpair->vha : NULL, - id + ql_dbg_offset); + if (!pbuf[0]) /* set by ql_ktrace */ + ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), NULL, + qpair ? qpair->vha : NULL, id + ql_dbg_offset); + pr_warn("%s%pV", pbuf, &vaf); va_end(va); diff --git a/drivers/scsi/qla2xxx/qla_dbg.h b/drivers/scsi/qla2xxx/qla_dbg.h index feeb1666227f..70482b55d240 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.h +++ b/drivers/scsi/qla2xxx/qla_dbg.h @@ -385,3 +385,46 @@ ql_mask_match(uint level) return level && ((level & ql2xextended_error_logging) == level); } + +static inline int +ql_mask_match_ext(uint level, int *log_tunable) +{ + if (*log_tunable == 1) + *log_tunable = QL_DBG_DEFAULT1_MASK; + + return (level & *log_tunable) == level; +} + +/* Assumes local variable pbuf and pbuf_ready present. */ +#define ql_ktrace(dbg_msg, level, pbuf, pdev, vha, id, fmt) do { \ + struct va_format _vaf; \ + va_list _va; \ + u32 dbg_off = dbg_msg ? ql_dbg_offset : 0; \ + \ + pbuf[0] = 0; \ + if (!trace_ql_dbg_log_enabled()) \ + break; \ + \ + if (dbg_msg && !ql_mask_match_ext(level, \ + &ql2xextended_error_logging_ktrace)) \ + break; \ + \ + ql_dbg_prefix(pbuf, ARRAY_SIZE(pbuf), pdev, vha, id + dbg_off); \ + \ + va_start(_va, fmt); \ + _vaf.fmt = fmt; \ + _vaf.va = &_va; \ + \ + trace_ql_dbg_log(pbuf, &_vaf); \ + \ + va_end(_va); \ +} while (0) + +#define QLA_ENABLE_KERNEL_TRACING + +#ifdef QLA_ENABLE_KERNEL_TRACING +#define QLA_TRACE_ENABLE(_tr) \ + trace_array_set_clr_event(_tr, "qla", NULL, true) +#else /* QLA_ENABLE_KERNEL_TRACING */ +#define QLA_TRACE_ENABLE(_tr) +#endif /* QLA_ENABLE_KERNEL_TRACING */ diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h index bb69fa8b956a..2fc280e61306 100644 --- a/drivers/scsi/qla2xxx/qla_gbl.h +++ b/drivers/scsi/qla2xxx/qla_gbl.h @@ -163,6 +163,7 @@ extern int ql2xrdpenable; extern int ql2xsmartsan; extern int ql2xallocfwdump; extern int ql2xextended_error_logging; +extern int ql2xextended_error_logging_ktrace; extern int ql2xiidmaenable; extern int ql2xmqsupport; extern int ql2xfwloadbin; diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index ce7cf7750f62..f76ae8a64ea9 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -15,6 +15,8 @@ #include #include #include +#include +#include #include #include @@ -35,6 +37,8 @@ static int apidev_major; */ struct kmem_cache *srb_cachep; +struct trace_array *qla_trc_array; + int ql2xfulldump_on_mpifail; module_param(ql2xfulldump_on_mpifail, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(ql2xfulldump_on_mpifail, @@ -117,6 +121,11 @@ MODULE_PARM_DESC(ql2xextended_error_logging, "ql2xextended_error_logging=1).\n" "\t\tDo LOGICAL OR of the value to enable more than one level"); +int ql2xextended_error_logging_ktrace = 1; +module_param(ql2xextended_error_logging_ktrace, int, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(ql2xextended_error_logging_ktrace, + "Same BIT definiton as ql2xextended_error_logging, but used to control logging to kernel trace buffer (default=1).\n"); + int ql2xshiftctondsd = 6; module_param(ql2xshiftctondsd, int, S_IRUGO); MODULE_PARM_DESC(ql2xshiftctondsd, @@ -2839,6 +2848,27 @@ static void qla2x00_iocb_work_fn(struct work_struct *work) spin_unlock_irqrestore(&vha->work_lock, flags); } +static void +qla_trace_init(void) +{ + qla_trc_array = trace_array_get_by_name("qla2xxx"); + if (!qla_trc_array) { + ql_log(ql_log_fatal, NULL, 0x0001, + "Unable to create qla2xxx trace instance, instance logging will be disabled.\n"); + return; + } + + QLA_TRACE_ENABLE(qla_trc_array); +} + +static void +qla_trace_uninit(void) +{ + if (!qla_trc_array) + return; + trace_array_put(qla_trc_array); +} + /* * PCI driver interface */ @@ -8181,6 +8211,8 @@ qla2x00_module_init(void) BUILD_BUG_ON(sizeof(sw_info_t) != 32); BUILD_BUG_ON(sizeof(target_id_t) != 2); + qla_trace_init(); + /* Allocate cache for SRBs. */ srb_cachep = kmem_cache_create("qla2xxx_srbs", sizeof(srb_t), 0, SLAB_HWCACHE_ALIGN, NULL); @@ -8259,6 +8291,8 @@ qla2x00_module_init(void) destroy_cache: kmem_cache_destroy(srb_cachep); + + qla_trace_uninit(); return ret; } @@ -8277,6 +8311,7 @@ qla2x00_module_exit(void) fc_release_transport(qla2xxx_transport_template); qlt_exit(); kmem_cache_destroy(srb_cachep); + qla_trace_uninit(); } module_init(qla2x00_module_init);