182 lines
4.0 KiB
C
182 lines
4.0 KiB
C
/*
|
|
* QLogic Fibre Channel HBA Driver
|
|
* Copyright (c) 2003-2013 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) && !IS_QLA83XX(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;
|
|
}
|