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authorHannes Reinecke <hare@suse.de>2015-03-27 16:46:38 +0100
committerTejun Heo <tj@kernel.org>2015-03-27 11:59:22 -0400
commit255c03d15a29a3ccb7a40d247f02bf38ba3f3592 (patch)
treef5e7b15d1d04622a464a5eb3d22f5cd171af56f0 /drivers/ata/libata-trace.c
parenta1524f226a02aa6edebd90ae0752e97cfd78b159 (diff)
libata: Add tracepoints
Add some tracepoints for ata_qc_issue, ata_qc_complete, and ata_eh_link_autopsy. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/libata-trace.c')
-rw-r--r--drivers/ata/libata-trace.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/ata/libata-trace.c b/drivers/ata/libata-trace.c
new file mode 100644
index 000000000000..fd30b8c10cf5
--- /dev/null
+++ b/drivers/ata/libata-trace.c
@@ -0,0 +1,151 @@
+/*
+ * libata-trace.c - trace functions for libata
+ *
+ * Copyright 2015 Hannes Reinecke
+ * Copyright 2015 SUSE Linux GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/trace_seq.h>
+#include <trace/events/libata.h>
+
+const char *
+libata_trace_parse_status(struct trace_seq *p, unsigned char status)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "{ ");
+ if (status & ATA_BUSY)
+ trace_seq_printf(p, "BUSY ");
+ if (status & ATA_DRDY)
+ trace_seq_printf(p, "DRDY ");
+ if (status & ATA_DF)
+ trace_seq_printf(p, "DF ");
+ if (status & ATA_DSC)
+ trace_seq_printf(p, "DSC ");
+ if (status & ATA_DRQ)
+ trace_seq_printf(p, "DRQ ");
+ if (status & ATA_CORR)
+ trace_seq_printf(p, "CORR ");
+ if (status & ATA_SENSE)
+ trace_seq_printf(p, "SENSE ");
+ if (status & ATA_ERR)
+ trace_seq_printf(p, "ERR ");
+ trace_seq_putc(p, '}');
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+const char *
+libata_trace_parse_eh_action(struct trace_seq *p, unsigned int eh_action)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "%x", eh_action);
+ if (eh_action) {
+ trace_seq_printf(p, "{ ");
+ if (eh_action & ATA_EH_REVALIDATE)
+ trace_seq_printf(p, "REVALIDATE ");
+ if (eh_action & (ATA_EH_SOFTRESET | ATA_EH_HARDRESET))
+ trace_seq_printf(p, "RESET ");
+ else if (eh_action & ATA_EH_SOFTRESET)
+ trace_seq_printf(p, "SOFTRESET ");
+ else if (eh_action & ATA_EH_HARDRESET)
+ trace_seq_printf(p, "HARDRESET ");
+ if (eh_action & ATA_EH_ENABLE_LINK)
+ trace_seq_printf(p, "ENABLE_LINK ");
+ if (eh_action & ATA_EH_PARK)
+ trace_seq_printf(p, "PARK ");
+ trace_seq_putc(p, '}');
+ }
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+const char *
+libata_trace_parse_eh_err_mask(struct trace_seq *p, unsigned int eh_err_mask)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "%x", eh_err_mask);
+ if (eh_err_mask) {
+ trace_seq_printf(p, "{ ");
+ if (eh_err_mask & AC_ERR_DEV)
+ trace_seq_printf(p, "DEV ");
+ if (eh_err_mask & AC_ERR_HSM)
+ trace_seq_printf(p, "HSM ");
+ if (eh_err_mask & AC_ERR_TIMEOUT)
+ trace_seq_printf(p, "TIMEOUT ");
+ if (eh_err_mask & AC_ERR_MEDIA)
+ trace_seq_printf(p, "MEDIA ");
+ if (eh_err_mask & AC_ERR_ATA_BUS)
+ trace_seq_printf(p, "ATA_BUS ");
+ if (eh_err_mask & AC_ERR_HOST_BUS)
+ trace_seq_printf(p, "HOST_BUS ");
+ if (eh_err_mask & AC_ERR_SYSTEM)
+ trace_seq_printf(p, "SYSTEM ");
+ if (eh_err_mask & AC_ERR_INVALID)
+ trace_seq_printf(p, "INVALID ");
+ if (eh_err_mask & AC_ERR_OTHER)
+ trace_seq_printf(p, "OTHER ");
+ if (eh_err_mask & AC_ERR_NODEV_HINT)
+ trace_seq_printf(p, "NODEV_HINT ");
+ if (eh_err_mask & AC_ERR_NCQ)
+ trace_seq_printf(p, "NCQ ");
+ trace_seq_putc(p, '}');
+ }
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
+const char *
+libata_trace_parse_qc_flags(struct trace_seq *p, unsigned int qc_flags)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "%x", qc_flags);
+ if (qc_flags) {
+ trace_seq_printf(p, "{ ");
+ if (qc_flags & ATA_QCFLAG_ACTIVE)
+ trace_seq_printf(p, "ACTIVE ");
+ if (qc_flags & ATA_QCFLAG_DMAMAP)
+ trace_seq_printf(p, "DMAMAP ");
+ if (qc_flags & ATA_QCFLAG_IO)
+ trace_seq_printf(p, "IO ");
+ if (qc_flags & ATA_QCFLAG_RESULT_TF)
+ trace_seq_printf(p, "RESULT_TF ");
+ if (qc_flags & ATA_QCFLAG_CLEAR_EXCL)
+ trace_seq_printf(p, "CLEAR_EXCL ");
+ if (qc_flags & ATA_QCFLAG_QUIET)
+ trace_seq_printf(p, "QUIET ");
+ if (qc_flags & ATA_QCFLAG_RETRY)
+ trace_seq_printf(p, "RETRY ");
+ if (qc_flags & ATA_QCFLAG_FAILED)
+ trace_seq_printf(p, "FAILED ");
+ if (qc_flags & ATA_QCFLAG_SENSE_VALID)
+ trace_seq_printf(p, "SENSE_VALID ");
+ if (qc_flags & ATA_QCFLAG_EH_SCHEDULED)
+ trace_seq_printf(p, "EH_SCHEDULED ");
+ trace_seq_putc(p, '}');
+ }
+ trace_seq_putc(p, 0);
+
+ return ret;
+}