[net-next-2.6.git] / drivers / scsi / qla2xxx / qla_dfs.c

/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2008 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)
		qla_printk(KERN_WARNING, ha,
		    "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, ha);
}

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) {
		qla_printk(KERN_WARNING, ha,
		    "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))
		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) {
		qla_printk(KERN_NOTICE, ha,
		    "DebugFS: Unable to create 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) {
		qla_printk(KERN_NOTICE, ha,
		    "DebugFS: Unable to create 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, ha,
	    &dfs_fce_ops);
	if (!ha->dfs_fce) {
		qla_printk(KERN_NOTICE, ha,
		    "DebugFS: Unable to 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;
}
Commit	Line	Data
df613b96 AV	1	/*
df613b96 AV	2	* QLogic Fibre Channel HBA Driver
01e58d8e	3	* Copyright (c) 2003-2008 QLogic Corporation
df613b96 AV	4	*
	5	* See LICENSE.qla2xxx for copyright and licensing details.
	6	*/
	7	#include "qla_def.h"
	8
	9	#include <linux/debugfs.h>
	10	#include <linux/seq_file.h>
	11
	12	static struct dentry *qla2x00_dfs_root;
	13	static atomic_t qla2x00_dfs_root_count;
	14
	15	static int
	16	qla2x00_dfs_fce_show(struct seq_file s, void unused)
	17	{
7b867cf7	18	scsi_qla_host_t *vha = s->private;
df613b96 AV	19	uint32_t cnt;
	20	uint32_t *fce;
	21	uint64_t fce_start;
7b867cf7	22	struct qla_hw_data *ha = vha->hw;
df613b96 AV	23
	24	mutex_lock(&ha->fce_mutex);
	25
	26	seq_printf(s, "FCE Trace Buffer\n");
279e7f54	27	seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
df613b96 AV	28	seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
	29	seq_printf(s, "FCE Enable Registers\n");
	30	seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
	31	ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
	32	ha->fce_mb[5], ha->fce_mb[6]);
	33
	34	fce = (uint32_t *) ha->fce;
	35	fce_start = (unsigned long long) ha->fce_dma;
	36	for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
	37	if (cnt % 8 == 0)
	38	seq_printf(s, "\n%llx: ",
	39	(unsigned long long)((cnt * 4) + fce_start));
	40	else
	41	seq_printf(s, " ");
	42	seq_printf(s, "%08x", *fce++);
	43	}
	44
	45	seq_printf(s, "\nEnd\n");
	46
	47	mutex_unlock(&ha->fce_mutex);
	48
	49	return 0;
	50	}
	51
	52	static int
	53	qla2x00_dfs_fce_open(struct inode inode, struct file file)
	54	{
7b867cf7 AC	55	scsi_qla_host_t *vha = inode->i_private;
7b867cf7 AC	56	struct qla_hw_data *ha = vha->hw;
df613b96 AV	57	int rval;
	58
	59	if (!ha->flags.fce_enabled)
	60	goto out;
	61
	62	mutex_lock(&ha->fce_mutex);
	63
	64	/* Pause tracing to flush FCE buffers. */
7b867cf7	65	rval = qla2x00_disable_fce_trace(vha, &ha->fce_wr, &ha->fce_rd);
df613b96 AV	66	if (rval)
	67	qla_printk(KERN_WARNING, ha,
	68	"DebugFS: Unable to disable FCE (%d).\n", rval);
	69
	70	ha->flags.fce_enabled = 0;
	71
	72	mutex_unlock(&ha->fce_mutex);
	73	out:
	74	return single_open(file, qla2x00_dfs_fce_show, ha);
	75	}
	76
	77	static int
	78	qla2x00_dfs_fce_release(struct inode inode, struct file file)
	79	{
7b867cf7 AC	80	scsi_qla_host_t *vha = inode->i_private;
7b867cf7 AC	81	struct qla_hw_data *ha = vha->hw;
df613b96 AV	82	int rval;
	83
	84	if (ha->flags.fce_enabled)
	85	goto out;
	86
	87	mutex_lock(&ha->fce_mutex);
	88
	89	/* Re-enable FCE tracing. */
	90	ha->flags.fce_enabled = 1;
	91	memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
7b867cf7	92	rval = qla2x00_enable_fce_trace(vha, ha->fce_dma, ha->fce_bufs,
df613b96 AV	93	ha->fce_mb, &ha->fce_bufs);
	94	if (rval) {
	95	qla_printk(KERN_WARNING, ha,
	96	"DebugFS: Unable to reinitialize FCE (%d).\n", rval);
	97	ha->flags.fce_enabled = 0;
	98	}
	99
	100	mutex_unlock(&ha->fce_mutex);
	101	out:
	102	return single_release(inode, file);
	103	}
	104
	105	static const struct file_operations dfs_fce_ops = {
	106	.open = qla2x00_dfs_fce_open,
	107	.read = seq_read,
	108	.llseek = seq_lseek,
	109	.release = qla2x00_dfs_fce_release,
	110	};
	111
	112	int
7b867cf7	113	qla2x00_dfs_setup(scsi_qla_host_t *vha)
df613b96	114	{
7b867cf7	115	struct qla_hw_data *ha = vha->hw;
df613b96 AV	116	if (!IS_QLA25XX(ha))
	117	goto out;
	118	if (!ha->fce)
	119	goto out;
	120
	121	if (qla2x00_dfs_root)
	122	goto create_dir;
	123
	124	atomic_set(&qla2x00_dfs_root_count, 0);
	125	qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
	126	if (!qla2x00_dfs_root) {
	127	qla_printk(KERN_NOTICE, ha,
	128	"DebugFS: Unable to create root directory.\n");
	129	goto out;
	130	}
	131
	132	create_dir:
	133	if (ha->dfs_dir)
	134	goto create_nodes;
	135
	136	mutex_init(&ha->fce_mutex);
7b867cf7	137	ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
df613b96 AV	138	if (!ha->dfs_dir) {
	139	qla_printk(KERN_NOTICE, ha,
	140	"DebugFS: Unable to create ha directory.\n");
	141	goto out;
	142	}
	143
	144	atomic_inc(&qla2x00_dfs_root_count);
	145
	146	create_nodes:
	147	ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, ha,
	148	&dfs_fce_ops);
	149	if (!ha->dfs_fce) {
	150	qla_printk(KERN_NOTICE, ha,
	151	"DebugFS: Unable to fce node.\n");
	152	goto out;
	153	}
	154	out:
	155	return 0;
	156	}
	157
	158	int
7b867cf7	159	qla2x00_dfs_remove(scsi_qla_host_t *vha)
df613b96	160	{
7b867cf7	161	struct qla_hw_data *ha = vha->hw;
df613b96 AV	162	if (ha->dfs_fce) {
	163	debugfs_remove(ha->dfs_fce);
	164	ha->dfs_fce = NULL;
	165	}
	166
	167	if (ha->dfs_dir) {
	168	debugfs_remove(ha->dfs_dir);
	169	ha->dfs_dir = NULL;
	170	atomic_dec(&qla2x00_dfs_root_count);
	171	}
	172
	173	if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
	174	qla2x00_dfs_root) {
	175	debugfs_remove(qla2x00_dfs_root);
	176	qla2x00_dfs_root = NULL;
	177	}
	178
	179	return 0;
	180	}