From: Arun Easi <aeasi@marvell.com>
Date: Fri, 26 Aug 2022 03:25:57 -0700
Subject: scsi: qla2xxx: Enhance driver tracing with separate tunable and more
Patch-mainline: v6.1-rc1
Git-commit: 8bfc149ba24cb985d593c0b2ddcf03ce42febe0c
References: bsc#1203935
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 <dwagner@suse.de>
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
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,
/* <module-name> [<dev-name>]-<msg-id>:<host>: */
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 {
/* <module-name> [<dev-name>]-<msg-id>: : */
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 <linux/blk-mq-pci.h>
#include <linux/refcount.h>
#include <linux/crash_dump.h>
+#include <linux/trace_events.h>
+#include <linux/trace.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsicam.h>
@@ -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);
--
2.35.3