linux/drivers/scsi/qla2xxx/qla_dfs.c
Saurav Kashyap 7c3df1320e [SCSI] qla2xxx: Code changes to support new dynamic logging infrastructure.
The code is changed to support the new dynamic logging infrastructure.
Following are the levels added.
Default is 0 - no logging.  0x40000000 - Module Init & Probe.
0x20000000 - Mailbox Cmnds. 0x10000000 - Device Discovery.
0x08000000 - IO tracing.    0x04000000 - DPC Thread.
0x02000000 - Async events.  0x01000000 - Timer routines.
0x00800000 - User space.    0x00400000 - Task Management.
0x00200000 - AER/EEH.       0x00100000 - Multi Q.
0x00080000 - P3P Specific.  0x00040000 - Virtual Port.
0x00020000 - Buffer Dump.   0x00010000 - Misc.
0x7fffffff - For enabling all logs, can be too many logs.

Setting ql2xextended_error_logging module parameter to any of the above
value, will enable the debug for that particular level.
Do LOGICAL OR of the value to enable more than one level.

Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2011-07-27 14:16:17 +04:00

182 lines
4.0 KiB
C

/*
* QLogic Fibre Channel HBA Driver
* Copyright (c) 2003-2011 QLogic Corporation
*
* See LICENSE.qla2xxx for copyright and licensing details.
*/
#include "qla_def.h"
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static struct dentry *qla2x00_dfs_root;
static atomic_t qla2x00_dfs_root_count;
static int
qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
{
scsi_qla_host_t *vha = s->private;
uint32_t cnt;
uint32_t *fce;
uint64_t fce_start;
struct qla_hw_data *ha = vha->hw;
mutex_lock(&ha->fce_mutex);
seq_printf(s, "FCE Trace Buffer\n");
seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
seq_printf(s, "FCE Enable Registers\n");
seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
ha->fce_mb[5], ha->fce_mb[6]);
fce = (uint32_t *) ha->fce;
fce_start = (unsigned long long) ha->fce_dma;
for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
if (cnt % 8 == 0)
seq_printf(s, "\n%llx: ",
(unsigned long long)((cnt * 4) + fce_start));
else
seq_printf(s, " ");
seq_printf(s, "%08x", *fce++);
}
seq_printf(s, "\nEnd\n");
mutex_unlock(&ha->fce_mutex);
return 0;
}
static int
qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
{
scsi_qla_host_t *vha = inode->i_private;
struct qla_hw_data *ha = vha->hw;
int rval;
if (!ha->flags.fce_enabled)
goto out;
mutex_lock(&ha->fce_mutex);
/* Pause tracing to flush FCE buffers. */
rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
if (rval)
ql_dbg(ql_dbg_user, vha, 0x705c,
"DebugFS: Unable to disable FCE (%d).\n", rval);
ha->flags.fce_enabled = 0;
mutex_unlock(&ha->fce_mutex);
out:
return single_open(file, qla2x00_dfs_fce_show, vha);
}
static int
qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
{
scsi_qla_host_t *vha = inode->i_private;
struct qla_hw_data *ha = vha->hw;
int rval;
if (ha->flags.fce_enabled)
goto out;
mutex_lock(&ha->fce_mutex);
/* Re-enable FCE tracing. */
ha->flags.fce_enabled = 1;
memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
ha->fce_mb, &ha->fce_bufs);
if (rval) {
ql_dbg(ql_dbg_user, vha, 0x700d,
"DebugFS: Unable to reinitialize FCE (%d).\n", rval);
ha->flags.fce_enabled = 0;
}
mutex_unlock(&ha->fce_mutex);
out:
return single_release(inode, file);
}
static const struct file_operations dfs_fce_ops = {
.open = qla2x00_dfs_fce_open,
.read = seq_read,
.llseek = seq_lseek,
.release = qla2x00_dfs_fce_release,
};
int
qla2x00_dfs_setup(scsi_qla_host_t *vha)
{
struct qla_hw_data *ha = vha->hw;
if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha))
goto out;
if (!ha->fce)
goto out;
if (qla2x00_dfs_root)
goto create_dir;
atomic_set(&qla2x00_dfs_root_count, 0);
qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
if (!qla2x00_dfs_root) {
ql_log(ql_log_warn, vha, 0x00f7,
"Unable to create debugfs root directory.\n");
goto out;
}
create_dir:
if (ha->dfs_dir)
goto create_nodes;
mutex_init(&ha->fce_mutex);
ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
if (!ha->dfs_dir) {
ql_log(ql_log_warn, vha, 0x00f8,
"Unable to create debugfs ha directory.\n");
goto out;
}
atomic_inc(&qla2x00_dfs_root_count);
create_nodes:
ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
&dfs_fce_ops);
if (!ha->dfs_fce) {
ql_log(ql_log_warn, vha, 0x00f9,
"Unable to create debugfs fce node.\n");
goto out;
}
out:
return 0;
}
int
qla2x00_dfs_remove(scsi_qla_host_t *vha)
{
struct qla_hw_data *ha = vha->hw;
if (ha->dfs_fce) {
debugfs_remove(ha->dfs_fce);
ha->dfs_fce = NULL;
}
if (ha->dfs_dir) {
debugfs_remove(ha->dfs_dir);
ha->dfs_dir = NULL;
atomic_dec(&qla2x00_dfs_root_count);
}
if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
qla2x00_dfs_root) {
debugfs_remove(qla2x00_dfs_root);
qla2x00_dfs_root = NULL;
}
return 0;
}