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linux/drivers/ata/libata-trace.c
Niklas Cassel 876293121f ata: scsi: rename flag ATA_QCFLAG_FAILED to ATA_QCFLAG_EH 
The name ATA_QCFLAG_FAILED is misleading since it does not mean that a
QC completed in error, or that it didn't complete at all. It means that
libata decided to schedule EH for the QC, so the QC is now owned by the
libata error handler (EH).

The normal execution path is responsible for not accessing a QC owned
by EH. libata core enforces the rule by returning NULL from
ata_qc_from_tag() for QCs owned by EH.

It is quite easy to mistake that a QC marked with ATA_QCFLAG_FAILED was
an error. However, a QC that was actually an error is instead indicated
by having qc->err_mask set. E.g. when we have a NCQ error, we abort all
QCs, which currently will mark all QCs as ATA_QCFLAG_FAILED. However, it
will only be a single QC that is an error (i.e. has qc->err_mask set).

Rename ATA_QCFLAG_FAILED to ATA_QCFLAG_EH to more clearly highlight that
this flag simply means that a QC is now owned by EH. This new name will
not mislead to think that the QC was an error (which is instead
indicated by having qc->err_mask set).

This also makes it more obvious that the EH code skips all QCs that do
not have ATA_QCFLAG_EH set (rather than ATA_QCFLAG_FAILED), since the EH
code should simply only care about QCs that are owned by EH itself.

Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
2023-01-04 13:36:26 +09:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* libata-trace.c - trace functions for libata
*
* Copyright 2015 Hannes Reinecke
* Copyright 2015 SUSE Linux GmbH
*/
#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_host_stat(struct trace_seq *p, unsigned char host_stat)
{
const char *ret = trace_seq_buffer_ptr(p);
trace_seq_printf(p, "{ ");
if (host_stat & ATA_DMA_INTR)
trace_seq_printf(p, "INTR ");
if (host_stat & ATA_DMA_ERR)
trace_seq_printf(p, "ERR ");
if (host_stat & ATA_DMA_ACTIVE)
trace_seq_printf(p, "ACTIVE ");
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_EH)
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;
}
const char *
libata_trace_parse_tf_flags(struct trace_seq *p, unsigned int tf_flags)
{
const char *ret = trace_seq_buffer_ptr(p);
trace_seq_printf(p, "%x", tf_flags);
if (tf_flags) {
trace_seq_printf(p, "{ ");
if (tf_flags & ATA_TFLAG_LBA48)
trace_seq_printf(p, "LBA48 ");
if (tf_flags & ATA_TFLAG_ISADDR)
trace_seq_printf(p, "ISADDR ");
if (tf_flags & ATA_TFLAG_DEVICE)
trace_seq_printf(p, "DEV ");
if (tf_flags & ATA_TFLAG_WRITE)
trace_seq_printf(p, "WRITE ");
if (tf_flags & ATA_TFLAG_LBA)
trace_seq_printf(p, "LBA ");
if (tf_flags & ATA_TFLAG_FUA)
trace_seq_printf(p, "FUA ");
if (tf_flags & ATA_TFLAG_POLLING)
trace_seq_printf(p, "POLL ");
trace_seq_putc(p, '}');
}
trace_seq_putc(p, 0);
return ret;
}
const char *
libata_trace_parse_subcmd(struct trace_seq *p, unsigned char cmd,
unsigned char feature, unsigned char hob_nsect)
{
const char *ret = trace_seq_buffer_ptr(p);
switch (cmd) {
case ATA_CMD_FPDMA_RECV:
switch (hob_nsect & 0x5f) {
case ATA_SUBCMD_FPDMA_RECV_RD_LOG_DMA_EXT:
trace_seq_printf(p, " READ_LOG_DMA_EXT");
break;
case ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN:
trace_seq_printf(p, " ZAC_MGMT_IN");
break;
}
break;
case ATA_CMD_FPDMA_SEND:
switch (hob_nsect & 0x5f) {
case ATA_SUBCMD_FPDMA_SEND_WR_LOG_DMA_EXT:
trace_seq_printf(p, " WRITE_LOG_DMA_EXT");
break;
case ATA_SUBCMD_FPDMA_SEND_DSM:
trace_seq_printf(p, " DATASET_MANAGEMENT");
break;
}
break;
case ATA_CMD_NCQ_NON_DATA:
switch (feature) {
case ATA_SUBCMD_NCQ_NON_DATA_ABORT_QUEUE:
trace_seq_printf(p, " ABORT_QUEUE");
break;
case ATA_SUBCMD_NCQ_NON_DATA_SET_FEATURES:
trace_seq_printf(p, " SET_FEATURES");
break;
case ATA_SUBCMD_NCQ_NON_DATA_ZERO_EXT:
trace_seq_printf(p, " ZERO_EXT");
break;
case ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT:
trace_seq_printf(p, " ZAC_MGMT_OUT");
break;
}
break;
case ATA_CMD_ZAC_MGMT_IN:
switch (feature) {
case ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES:
trace_seq_printf(p, " REPORT_ZONES");
break;
}
break;
case ATA_CMD_ZAC_MGMT_OUT:
switch (feature) {
case ATA_SUBCMD_ZAC_MGMT_OUT_CLOSE_ZONE:
trace_seq_printf(p, " CLOSE_ZONE");
break;
case ATA_SUBCMD_ZAC_MGMT_OUT_FINISH_ZONE:
trace_seq_printf(p, " FINISH_ZONE");
break;
case ATA_SUBCMD_ZAC_MGMT_OUT_OPEN_ZONE:
trace_seq_printf(p, " OPEN_ZONE");
break;
case ATA_SUBCMD_ZAC_MGMT_OUT_RESET_WRITE_POINTER:
trace_seq_printf(p, " RESET_WRITE_POINTER");
break;
}
break;
}
trace_seq_putc(p, 0);
return ret;
}
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