[linux-2.6-block.git] / drivers / scsi / qla2xxx / qla_dfs.c

/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2014 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_puts(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_puts(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_putc(s, ' ');
		seq_printf(s, "%08x", *fce++);
	}

	seq_puts(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) &&
	    !IS_QLA27XX(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;
}
Commit	Line	Data
df613b96 AV	1	/*
df613b96 AV	2	* QLogic Fibre Channel HBA Driver
bd21eaf9	3	* Copyright (c) 2003-2014 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
91c40f24	26	seq_puts(s, "FCE Trace Buffer\n");
279e7f54	27	seq_printf(s, "In Pointer = %llx\n\n", (unsigned long long)ha->fce_wr);
df613b96	28	seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
91c40f24	29	seq_puts(s, "FCE Enable Registers\n");
df613b96 AV	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
f50332ff	41	seq_putc(s, ' ');
df613b96 AV	42	seq_printf(s, "%08x", *fce++);
	43	}
	44
91c40f24	45	seq_puts(s, "\nEnd\n");
df613b96 AV	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	66	if (rval)
7c3df132	67	ql_dbg(ql_dbg_user, vha, 0x705c,
df613b96 AV	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:
94279ede	74	return single_open(file, qla2x00_dfs_fce_show, vha);
df613b96 AV	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);
df613b96 AV	94	if (rval) {
7c3df132	95	ql_dbg(ql_dbg_user, vha, 0x700d,
df613b96 AV	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;
3a03eb79	116
f73cb695 CD	117	if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha) && !IS_QLA83XX(ha) &&
f73cb695 CD	118	!IS_QLA27XX(ha))
df613b96 AV	119	goto out;
	120	if (!ha->fce)
	121	goto out;
	122
	123	if (qla2x00_dfs_root)
	124	goto create_dir;
	125
	126	atomic_set(&qla2x00_dfs_root_count, 0);
	127	qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
	128	if (!qla2x00_dfs_root) {
7c3df132 SK	129	ql_log(ql_log_warn, vha, 0x00f7,
7c3df132 SK	130	"Unable to create debugfs root directory.\n");
df613b96 AV	131	goto out;
	132	}
	133
	134	create_dir:
	135	if (ha->dfs_dir)
	136	goto create_nodes;
	137
	138	mutex_init(&ha->fce_mutex);
7b867cf7	139	ha->dfs_dir = debugfs_create_dir(vha->host_str, qla2x00_dfs_root);
df613b96	140	if (!ha->dfs_dir) {
7c3df132 SK	141	ql_log(ql_log_warn, vha, 0x00f8,
7c3df132 SK	142	"Unable to create debugfs ha directory.\n");
df613b96 AV	143	goto out;
	144	}
	145
	146	atomic_inc(&qla2x00_dfs_root_count);
	147
	148	create_nodes:
94279ede	149	ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
df613b96 AV	150	&dfs_fce_ops);
df613b96 AV	151	if (!ha->dfs_fce) {
7c3df132 SK	152	ql_log(ql_log_warn, vha, 0x00f9,
7c3df132 SK	153	"Unable to create debugfs fce node.\n");
df613b96 AV	154	goto out;
	155	}
	156	out:
	157	return 0;
	158	}
	159
	160	int
7b867cf7	161	qla2x00_dfs_remove(scsi_qla_host_t *vha)
df613b96	162	{
7b867cf7	163	struct qla_hw_data *ha = vha->hw;
df613b96 AV	164	if (ha->dfs_fce) {
	165	debugfs_remove(ha->dfs_fce);
	166	ha->dfs_fce = NULL;
	167	}
	168
	169	if (ha->dfs_dir) {
	170	debugfs_remove(ha->dfs_dir);
	171	ha->dfs_dir = NULL;
	172	atomic_dec(&qla2x00_dfs_root_count);
	173	}
	174
	175	if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
	176	qla2x00_dfs_root) {
	177	debugfs_remove(qla2x00_dfs_root);
	178	qla2x00_dfs_root = NULL;
	179	}
	180
	181	return 0;
	182	}