[linux-2.6-block.git] / drivers / remoteproc / remoteproc_debugfs.c

/*
 * Remote Processor Framework
 *
 * Copyright (C) 2011 Texas Instruments, Inc.
 * Copyright (C) 2011 Google, Inc.
 *
 * Ohad Ben-Cohen <ohad@wizery.com>
 * Mark Grosen <mgrosen@ti.com>
 * Brian Swetland <swetland@google.com>
 * Fernando Guzman Lugo <fernando.lugo@ti.com>
 * Suman Anna <s-anna@ti.com>
 * Robert Tivy <rtivy@ti.com>
 * Armando Uribe De Leon <x0095078@ti.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#define pr_fmt(fmt)    "%s: " fmt, __func__

#include <linux/kernel.h>
#include <linux/debugfs.h>
#include <linux/remoteproc.h>
#include <linux/device.h>
#include <linux/uaccess.h>

#include "remoteproc_internal.h"

/* remoteproc debugfs parent dir */
static struct dentry *rproc_dbg;

/*
 * Some remote processors may support dumping trace logs into a shared
 * memory buffer. We expose this trace buffer using debugfs, so users
 * can easily tell what's going on remotely.
 *
 * We will most probably improve the rproc tracing facilities later on,
 * but this kind of lightweight and simple mechanism is always good to have,
 * as it provides very early tracing with little to no dependencies at all.
 */
static ssize_t rproc_trace_read(struct file *filp, char __user *userbuf,
				size_t count, loff_t *ppos)
{
	struct rproc_debug_trace *data = filp->private_data;
	struct rproc_mem_entry *trace = &data->trace_mem;
	void *va;
	char buf[100];
	int len;

	va = rproc_da_to_va(data->rproc, trace->da, trace->len);

	if (!va) {
		len = scnprintf(buf, sizeof(buf), "Trace %s not available\n",
				trace->name);
		va = buf;
	} else {
		len = strnlen(va, trace->len);
	}

	return simple_read_from_buffer(userbuf, count, ppos, va, len);
}

static const struct file_operations trace_rproc_ops = {
	.read = rproc_trace_read,
	.open = simple_open,
	.llseek	= generic_file_llseek,
};

/* expose the name of the remote processor via debugfs */
static ssize_t rproc_name_read(struct file *filp, char __user *userbuf,
			       size_t count, loff_t *ppos)
{
	struct rproc *rproc = filp->private_data;
	/* need room for the name, a newline and a terminating null */
	char buf[100];
	int i;

	i = scnprintf(buf, sizeof(buf), "%.98s\n", rproc->name);

	return simple_read_from_buffer(userbuf, count, ppos, buf, i);
}

static const struct file_operations rproc_name_ops = {
	.read = rproc_name_read,
	.open = simple_open,
	.llseek	= generic_file_llseek,
};

/* expose recovery flag via debugfs */
static ssize_t rproc_recovery_read(struct file *filp, char __user *userbuf,
				   size_t count, loff_t *ppos)
{
	struct rproc *rproc = filp->private_data;
	char *buf = rproc->recovery_disabled ? "disabled\n" : "enabled\n";

	return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
}

/*
 * By writing to the 'recovery' debugfs entry, we control the behavior of the
 * recovery mechanism dynamically. The default value of this entry is "enabled".
 *
 * The 'recovery' debugfs entry supports these commands:
 *
 * enabled:	When enabled, the remote processor will be automatically
 *		recovered whenever it crashes. Moreover, if the remote
 *		processor crashes while recovery is disabled, it will
 *		be automatically recovered too as soon as recovery is enabled.
 *
 * disabled:	When disabled, a remote processor will remain in a crashed
 *		state if it crashes. This is useful for debugging purposes;
 *		without it, debugging a crash is substantially harder.
 *
 * recover:	This function will trigger an immediate recovery if the
 *		remote processor is in a crashed state, without changing
 *		or checking the recovery state (enabled/disabled).
 *		This is useful during debugging sessions, when one expects
 *		additional crashes to happen after enabling recovery. In this
 *		case, enabling recovery will make it hard to debug subsequent
 *		crashes, so it's recommended to keep recovery disabled, and
 *		instead use the "recover" command as needed.
 */
static ssize_t
rproc_recovery_write(struct file *filp, const char __user *user_buf,
		     size_t count, loff_t *ppos)
{
	struct rproc *rproc = filp->private_data;
	char buf[10];
	int ret;

	if (count < 1 || count > sizeof(buf))
		return -EINVAL;

	ret = copy_from_user(buf, user_buf, count);
	if (ret)
		return -EFAULT;

	/* remove end of line */
	if (buf[count - 1] == '\n')
		buf[count - 1] = '\0';

	if (!strncmp(buf, "enabled", count)) {
		rproc->recovery_disabled = false;
		/* if rproc has crashed, trigger recovery */
		if (rproc->state == RPROC_CRASHED)
			rproc_trigger_recovery(rproc);
	} else if (!strncmp(buf, "disabled", count)) {
		rproc->recovery_disabled = true;
	} else if (!strncmp(buf, "recover", count)) {
		/* if rproc has crashed, trigger recovery */
		if (rproc->state == RPROC_CRASHED)
			rproc_trigger_recovery(rproc);
	}

	return count;
}

static const struct file_operations rproc_recovery_ops = {
	.read = rproc_recovery_read,
	.write = rproc_recovery_write,
	.open = simple_open,
	.llseek = generic_file_llseek,
};

/* expose the crash trigger via debugfs */
static ssize_t
rproc_crash_write(struct file *filp, const char __user *user_buf,
		  size_t count, loff_t *ppos)
{
	struct rproc *rproc = filp->private_data;
	unsigned int type;
	int ret;

	ret = kstrtouint_from_user(user_buf, count, 0, &type);
	if (ret < 0)
		return ret;

	rproc_report_crash(rproc, type);

	return count;
}

static const struct file_operations rproc_crash_ops = {
	.write = rproc_crash_write,
	.open = simple_open,
	.llseek = generic_file_llseek,
};

/* Expose resource table content via debugfs */
static int rproc_rsc_table_show(struct seq_file *seq, void *p)
{
	static const char * const types[] = {"carveout", "devmem", "trace", "vdev"};
	struct rproc *rproc = seq->private;
	struct resource_table *table = rproc->table_ptr;
	struct fw_rsc_carveout *c;
	struct fw_rsc_devmem *d;
	struct fw_rsc_trace *t;
	struct fw_rsc_vdev *v;
	int i, j;

	if (!table) {
		seq_puts(seq, "No resource table found\n");
		return 0;
	}

	for (i = 0; i < table->num; i++) {
		int offset = table->offset[i];
		struct fw_rsc_hdr *hdr = (void *)table + offset;
		void *rsc = (void *)hdr + sizeof(*hdr);

		switch (hdr->type) {
		case RSC_CARVEOUT:
			c = rsc;
			seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
			seq_printf(seq, "  Device Address 0x%x\n", c->da);
			seq_printf(seq, "  Physical Address 0x%x\n", c->pa);
			seq_printf(seq, "  Length 0x%x Bytes\n", c->len);
			seq_printf(seq, "  Flags 0x%x\n", c->flags);
			seq_printf(seq, "  Reserved (should be zero) [%d]\n", c->reserved);
			seq_printf(seq, "  Name %s\n\n", c->name);
			break;
		case RSC_DEVMEM:
			d = rsc;
			seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
			seq_printf(seq, "  Device Address 0x%x\n", d->da);
			seq_printf(seq, "  Physical Address 0x%x\n", d->pa);
			seq_printf(seq, "  Length 0x%x Bytes\n", d->len);
			seq_printf(seq, "  Flags 0x%x\n", d->flags);
			seq_printf(seq, "  Reserved (should be zero) [%d]\n", d->reserved);
			seq_printf(seq, "  Name %s\n\n", d->name);
			break;
		case RSC_TRACE:
			t = rsc;
			seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
			seq_printf(seq, "  Device Address 0x%x\n", t->da);
			seq_printf(seq, "  Length 0x%x Bytes\n", t->len);
			seq_printf(seq, "  Reserved (should be zero) [%d]\n", t->reserved);
			seq_printf(seq, "  Name %s\n\n", t->name);
			break;
		case RSC_VDEV:
			v = rsc;
			seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);

			seq_printf(seq, "  ID %d\n", v->id);
			seq_printf(seq, "  Notify ID %d\n", v->notifyid);
			seq_printf(seq, "  Device features 0x%x\n", v->dfeatures);
			seq_printf(seq, "  Guest features 0x%x\n", v->gfeatures);
			seq_printf(seq, "  Config length 0x%x\n", v->config_len);
			seq_printf(seq, "  Status 0x%x\n", v->status);
			seq_printf(seq, "  Number of vrings %d\n", v->num_of_vrings);
			seq_printf(seq, "  Reserved (should be zero) [%d][%d]\n\n",
				   v->reserved[0], v->reserved[1]);

			for (j = 0; j < v->num_of_vrings; j++) {
				seq_printf(seq, "  Vring %d\n", j);
				seq_printf(seq, "    Device Address 0x%x\n", v->vring[j].da);
				seq_printf(seq, "    Alignment %d\n", v->vring[j].align);
				seq_printf(seq, "    Number of buffers %d\n", v->vring[j].num);
				seq_printf(seq, "    Notify ID %d\n", v->vring[j].notifyid);
				seq_printf(seq, "    Physical Address 0x%x\n\n",
					   v->vring[j].pa);
			}
			break;
		default:
			seq_printf(seq, "Unknown resource type found: %d [hdr: %pK]\n",
				   hdr->type, hdr);
			break;
		}
	}

	return 0;
}

static int rproc_rsc_table_open(struct inode *inode, struct file *file)
{
	return single_open(file, rproc_rsc_table_show, inode->i_private);
}

static const struct file_operations rproc_rsc_table_ops = {
	.open		= rproc_rsc_table_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

/* Expose carveout content via debugfs */
static int rproc_carveouts_show(struct seq_file *seq, void *p)
{
	struct rproc *rproc = seq->private;
	struct rproc_mem_entry *carveout;

	list_for_each_entry(carveout, &rproc->carveouts, node) {
		seq_puts(seq, "Carveout memory entry:\n");
		seq_printf(seq, "\tName: %s\n", carveout->name);
		seq_printf(seq, "\tVirtual address: %pK\n", carveout->va);
		seq_printf(seq, "\tDMA address: %pad\n", &carveout->dma);
		seq_printf(seq, "\tDevice address: 0x%x\n", carveout->da);
		seq_printf(seq, "\tLength: 0x%x Bytes\n\n", carveout->len);
	}

	return 0;
}

static int rproc_carveouts_open(struct inode *inode, struct file *file)
{
	return single_open(file, rproc_carveouts_show, inode->i_private);
}

static const struct file_operations rproc_carveouts_ops = {
	.open		= rproc_carveouts_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

void rproc_remove_trace_file(struct dentry *tfile)
{
	debugfs_remove(tfile);
}

struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
				       struct rproc_debug_trace *trace)
{
	struct dentry *tfile;

	tfile = debugfs_create_file(name, 0400, rproc->dbg_dir, trace,
				    &trace_rproc_ops);
	if (!tfile) {
		dev_err(&rproc->dev, "failed to create debugfs trace entry\n");
		return NULL;
	}

	return tfile;
}

void rproc_delete_debug_dir(struct rproc *rproc)
{
	if (!rproc->dbg_dir)
		return;

	debugfs_remove_recursive(rproc->dbg_dir);
}

void rproc_create_debug_dir(struct rproc *rproc)
{
	struct device *dev = &rproc->dev;

	if (!rproc_dbg)
		return;

	rproc->dbg_dir = debugfs_create_dir(dev_name(dev), rproc_dbg);
	if (!rproc->dbg_dir)
		return;

	debugfs_create_file("name", 0400, rproc->dbg_dir,
			    rproc, &rproc_name_ops);
	debugfs_create_file("recovery", 0400, rproc->dbg_dir,
			    rproc, &rproc_recovery_ops);
	debugfs_create_file("crash", 0200, rproc->dbg_dir,
			    rproc, &rproc_crash_ops);
	debugfs_create_file("resource_table", 0400, rproc->dbg_dir,
			    rproc, &rproc_rsc_table_ops);
	debugfs_create_file("carveout_memories", 0400, rproc->dbg_dir,
			    rproc, &rproc_carveouts_ops);
}

void __init rproc_init_debugfs(void)
{
	if (debugfs_initialized()) {
		rproc_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
		if (!rproc_dbg)
			pr_err("can't create debugfs dir\n");
	}
}

void __exit rproc_exit_debugfs(void)
{
	debugfs_remove(rproc_dbg);
}
Commit	Line	Data
6391a706 OBC	1	/*
	2	* Remote Processor Framework
	3	*
	4	* Copyright (C) 2011 Texas Instruments, Inc.
	5	* Copyright (C) 2011 Google, Inc.
	6	*
	7	* Ohad Ben-Cohen <ohad@wizery.com>
	8	* Mark Grosen <mgrosen@ti.com>
	9	* Brian Swetland <swetland@google.com>
	10	* Fernando Guzman Lugo <fernando.lugo@ti.com>
	11	* Suman Anna <s-anna@ti.com>
	12	* Robert Tivy <rtivy@ti.com>
	13	* Armando Uribe De Leon <x0095078@ti.com>
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License
	17	* version 2 as published by the Free Software Foundation.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
	23	*/
	24
	25	#define pr_fmt(fmt) "%s: " fmt, __func__
	26
	27	#include <linux/kernel.h>
	28	#include <linux/debugfs.h>
	29	#include <linux/remoteproc.h>
	30	#include <linux/device.h>
2e37abb8 FGL	31	#include <linux/uaccess.h>
	32
	33	#include "remoteproc_internal.h"
6391a706 OBC	34
	35	/* remoteproc debugfs parent dir */
	36	static struct dentry *rproc_dbg;
	37
	38	/*
	39	* Some remote processors may support dumping trace logs into a shared
	40	* memory buffer. We expose this trace buffer using debugfs, so users
	41	* can easily tell what's going on remotely.
	42	*
	43	* We will most probably improve the rproc tracing facilities later on,
	44	* but this kind of lightweight and simple mechanism is always good to have,
	45	* as it provides very early tracing with little to no dependencies at all.
	46	*/
	47	static ssize_t rproc_trace_read(struct file filp, char __user userbuf,
730f84ce	48	size_t count, loff_t *ppos)
6391a706	49	{
a987e6b9 LP	50	struct rproc_debug_trace *data = filp->private_data;
	51	struct rproc_mem_entry *trace = &data->trace_mem;
	52	void *va;
	53	char buf[100];
	54	int len;
	55
	56	va = rproc_da_to_va(data->rproc, trace->da, trace->len);
	57
	58	if (!va) {
	59	len = scnprintf(buf, sizeof(buf), "Trace %s not available\n",
	60	trace->name);
	61	va = buf;
	62	} else {
	63	len = strnlen(va, trace->len);
	64	}
6391a706	65
a987e6b9	66	return simple_read_from_buffer(userbuf, count, ppos, va, len);
6391a706 OBC	67	}
6391a706 OBC	68
6391a706 OBC	69	static const struct file_operations trace_rproc_ops = {
6391a706 OBC	70	.read = rproc_trace_read,
234e3405	71	.open = simple_open,
6391a706 OBC	72	.llseek = generic_file_llseek,
	73	};
	74
6391a706 OBC	75	/* expose the name of the remote processor via debugfs */
6391a706 OBC	76	static ssize_t rproc_name_read(struct file filp, char __user userbuf,
730f84ce	77	size_t count, loff_t *ppos)
6391a706 OBC	78	{
	79	struct rproc *rproc = filp->private_data;
	80	/* need room for the name, a newline and a terminating null */
	81	char buf[100];
	82	int i;
	83
ae768d5f	84	i = scnprintf(buf, sizeof(buf), "%.98s\n", rproc->name);
6391a706 OBC	85
	86	return simple_read_from_buffer(userbuf, count, ppos, buf, i);
	87	}
	88
	89	static const struct file_operations rproc_name_ops = {
	90	.read = rproc_name_read,
234e3405	91	.open = simple_open,
6391a706 OBC	92	.llseek = generic_file_llseek,
	93	};
	94
2e37abb8 FGL	95	/* expose recovery flag via debugfs */
	96	static ssize_t rproc_recovery_read(struct file filp, char __user userbuf,
	97	size_t count, loff_t *ppos)
	98	{
	99	struct rproc *rproc = filp->private_data;
	100	char *buf = rproc->recovery_disabled ? "disabled\n" : "enabled\n";
	101
	102	return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
	103	}
	104
	105	/*
	106	* By writing to the 'recovery' debugfs entry, we control the behavior of the
	107	* recovery mechanism dynamically. The default value of this entry is "enabled".
	108	*
	109	* The 'recovery' debugfs entry supports these commands:
	110	*
	111	* enabled: When enabled, the remote processor will be automatically
	112	* recovered whenever it crashes. Moreover, if the remote
	113	* processor crashes while recovery is disabled, it will
	114	* be automatically recovered too as soon as recovery is enabled.
	115	*
	116	* disabled: When disabled, a remote processor will remain in a crashed
	117	* state if it crashes. This is useful for debugging purposes;
	118	* without it, debugging a crash is substantially harder.
	119	*
	120	* recover: This function will trigger an immediate recovery if the
	121	* remote processor is in a crashed state, without changing
	122	* or checking the recovery state (enabled/disabled).
	123	* This is useful during debugging sessions, when one expects
	124	* additional crashes to happen after enabling recovery. In this
	125	* case, enabling recovery will make it hard to debug subsequent
	126	* crashes, so it's recommended to keep recovery disabled, and
	127	* instead use the "recover" command as needed.
	128	*/
	129	static ssize_t
	130	rproc_recovery_write(struct file filp, const char __user user_buf,
	131	size_t count, loff_t *ppos)
	132	{
	133	struct rproc *rproc = filp->private_data;
	134	char buf[10];
	135	int ret;
	136
92792e48	137	if (count < 1 \|\| count > sizeof(buf))
47fff9fd	138	return -EINVAL;
2e37abb8 FGL	139
	140	ret = copy_from_user(buf, user_buf, count);
	141	if (ret)
bec109a4	142	return -EFAULT;
2e37abb8 FGL	143
	144	/* remove end of line */
	145	if (buf[count - 1] == '\n')
	146	buf[count - 1] = '\0';
	147
	148	if (!strncmp(buf, "enabled", count)) {
	149	rproc->recovery_disabled = false;
	150	/* if rproc has crashed, trigger recovery */
	151	if (rproc->state == RPROC_CRASHED)
	152	rproc_trigger_recovery(rproc);
	153	} else if (!strncmp(buf, "disabled", count)) {
	154	rproc->recovery_disabled = true;
	155	} else if (!strncmp(buf, "recover", count)) {
	156	/* if rproc has crashed, trigger recovery */
	157	if (rproc->state == RPROC_CRASHED)
	158	rproc_trigger_recovery(rproc);
	159	}
	160
	161	return count;
	162	}
	163
	164	static const struct file_operations rproc_recovery_ops = {
	165	.read = rproc_recovery_read,
	166	.write = rproc_recovery_write,
	167	.open = simple_open,
	168	.llseek = generic_file_llseek,
	169	};
	170
60042a22 XX	171	/* expose the crash trigger via debugfs */
	172	static ssize_t
	173	rproc_crash_write(struct file filp, const char __user user_buf,
	174	size_t count, loff_t *ppos)
	175	{
	176	struct rproc *rproc = filp->private_data;
	177	unsigned int type;
	178	int ret;
	179
	180	ret = kstrtouint_from_user(user_buf, count, 0, &type);
	181	if (ret < 0)
	182	return ret;
	183
	184	rproc_report_crash(rproc, type);
	185
	186	return count;
	187	}
	188
	189	static const struct file_operations rproc_crash_ops = {
	190	.write = rproc_crash_write,
	191	.open = simple_open,
	192	.llseek = generic_file_llseek,
	193	};
	194
bdd8edb9 LP	195	/* Expose resource table content via debugfs */
	196	static int rproc_rsc_table_show(struct seq_file seq, void p)
	197	{
	198	static const char * const types[] = {"carveout", "devmem", "trace", "vdev"};
	199	struct rproc *rproc = seq->private;
	200	struct resource_table *table = rproc->table_ptr;
	201	struct fw_rsc_carveout *c;
	202	struct fw_rsc_devmem *d;
	203	struct fw_rsc_trace *t;
	204	struct fw_rsc_vdev *v;
	205	int i, j;
	206
	207	if (!table) {
	208	seq_puts(seq, "No resource table found\n");
	209	return 0;
	210	}
	211
	212	for (i = 0; i < table->num; i++) {
	213	int offset = table->offset[i];
	214	struct fw_rsc_hdr hdr = (void )table + offset;
	215	void rsc = (void )hdr + sizeof(*hdr);
	216
	217	switch (hdr->type) {
	218	case RSC_CARVEOUT:
	219	c = rsc;
	220	seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
	221	seq_printf(seq, " Device Address 0x%x\n", c->da);
	222	seq_printf(seq, " Physical Address 0x%x\n", c->pa);
	223	seq_printf(seq, " Length 0x%x Bytes\n", c->len);
	224	seq_printf(seq, " Flags 0x%x\n", c->flags);
	225	seq_printf(seq, " Reserved (should be zero) [%d]\n", c->reserved);
	226	seq_printf(seq, " Name %s\n\n", c->name);
	227	break;
	228	case RSC_DEVMEM:
	229	d = rsc;
	230	seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
	231	seq_printf(seq, " Device Address 0x%x\n", d->da);
	232	seq_printf(seq, " Physical Address 0x%x\n", d->pa);
	233	seq_printf(seq, " Length 0x%x Bytes\n", d->len);
	234	seq_printf(seq, " Flags 0x%x\n", d->flags);
	235	seq_printf(seq, " Reserved (should be zero) [%d]\n", d->reserved);
	236	seq_printf(seq, " Name %s\n\n", d->name);
	237	break;
	238	case RSC_TRACE:
	239	t = rsc;
	240	seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
	241	seq_printf(seq, " Device Address 0x%x\n", t->da);
	242	seq_printf(seq, " Length 0x%x Bytes\n", t->len);
	243	seq_printf(seq, " Reserved (should be zero) [%d]\n", t->reserved);
	244	seq_printf(seq, " Name %s\n\n", t->name);
	245	break;
	246	case RSC_VDEV:
	247	v = rsc;
	248	seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
	249
	250	seq_printf(seq, " ID %d\n", v->id);
	251	seq_printf(seq, " Notify ID %d\n", v->notifyid);
	252	seq_printf(seq, " Device features 0x%x\n", v->dfeatures);
	253	seq_printf(seq, " Guest features 0x%x\n", v->gfeatures);
	254	seq_printf(seq, " Config length 0x%x\n", v->config_len);
	255	seq_printf(seq, " Status 0x%x\n", v->status);
	256	seq_printf(seq, " Number of vrings %d\n", v->num_of_vrings);
	257	seq_printf(seq, " Reserved (should be zero) [%d][%d]\n\n",
	258	v->reserved[0], v->reserved[1]);
259
260	for (j = 0; j < v->num_of_vrings; j++) {
261	seq_printf(seq, " Vring %d\n", j);
262	seq_printf(seq, " Device Address 0x%x\n", v->vring[j].da);
263	seq_printf(seq, " Alignment %d\n", v->vring[j].align);
264	seq_printf(seq, " Number of buffers %d\n", v->vring[j].num);
265	seq_printf(seq, " Notify ID %d\n", v->vring[j].notifyid);
266	seq_printf(seq, " Physical Address 0x%x\n\n",
267	v->vring[j].pa);
268	}
269	break;
270	default:
276ec993	271	seq_printf(seq, "Unknown resource type found: %d [hdr: %pK]\n",
bdd8edb9 LP	272	hdr->type, hdr);
	273	break;
	274	}
	275	}
	276
	277	return 0;
	278	}
	279
	280	static int rproc_rsc_table_open(struct inode inode, struct file file)
	281	{
	282	return single_open(file, rproc_rsc_table_show, inode->i_private);
	283	}
	284
	285	static const struct file_operations rproc_rsc_table_ops = {
	286	.open = rproc_rsc_table_open,
	287	.read = seq_read,
	288	.llseek = seq_lseek,
	289	.release = single_release,
	290	};
	291
b8918839 LP	292	/* Expose carveout content via debugfs */
	293	static int rproc_carveouts_show(struct seq_file seq, void p)
	294	{
	295	struct rproc *rproc = seq->private;
	296	struct rproc_mem_entry *carveout;
	297
	298	list_for_each_entry(carveout, &rproc->carveouts, node) {
	299	seq_puts(seq, "Carveout memory entry:\n");
3265230c	300	seq_printf(seq, "\tName: %s\n", carveout->name);
276ec993	301	seq_printf(seq, "\tVirtual address: %pK\n", carveout->va);
b8918839 LP	302	seq_printf(seq, "\tDMA address: %pad\n", &carveout->dma);
	303	seq_printf(seq, "\tDevice address: 0x%x\n", carveout->da);
	304	seq_printf(seq, "\tLength: 0x%x Bytes\n\n", carveout->len);
	305	}
	306
	307	return 0;
	308	}
	309
	310	static int rproc_carveouts_open(struct inode inode, struct file file)
	311	{
	312	return single_open(file, rproc_carveouts_show, inode->i_private);
	313	}
	314
	315	static const struct file_operations rproc_carveouts_ops = {
	316	.open = rproc_carveouts_open,
	317	.read = seq_read,
	318	.llseek = seq_lseek,
	319	.release = single_release,
	320	};
	321
6391a706 OBC	322	void rproc_remove_trace_file(struct dentry *tfile)
	323	{
	324	debugfs_remove(tfile);
	325	}
	326
	327	struct dentry rproc_create_trace_file(const char name, struct rproc *rproc,
a987e6b9	328	struct rproc_debug_trace *trace)
6391a706 OBC	329	{
	330	struct dentry *tfile;
	331
730f84ce AS	332	tfile = debugfs_create_file(name, 0400, rproc->dbg_dir, trace,
730f84ce AS	333	&trace_rproc_ops);
6391a706	334	if (!tfile) {
b5ab5e24	335	dev_err(&rproc->dev, "failed to create debugfs trace entry\n");
6391a706 OBC	336	return NULL;
	337	}
	338
	339	return tfile;
	340	}
	341
	342	void rproc_delete_debug_dir(struct rproc *rproc)
	343	{
	344	if (!rproc->dbg_dir)
	345	return;
	346
	347	debugfs_remove_recursive(rproc->dbg_dir);
	348	}
	349
	350	void rproc_create_debug_dir(struct rproc *rproc)
	351	{
b5ab5e24	352	struct device *dev = &rproc->dev;
6391a706 OBC	353
	354	if (!rproc_dbg)
	355	return;
	356
	357	rproc->dbg_dir = debugfs_create_dir(dev_name(dev), rproc_dbg);
	358	if (!rproc->dbg_dir)
	359	return;
	360
	361	debugfs_create_file("name", 0400, rproc->dbg_dir,
730f84ce	362	rproc, &rproc_name_ops);
2e37abb8	363	debugfs_create_file("recovery", 0400, rproc->dbg_dir,
730f84ce	364	rproc, &rproc_recovery_ops);
60042a22 XX	365	debugfs_create_file("crash", 0200, rproc->dbg_dir,
60042a22 XX	366	rproc, &rproc_crash_ops);
bdd8edb9 LP	367	debugfs_create_file("resource_table", 0400, rproc->dbg_dir,
bdd8edb9 LP	368	rproc, &rproc_rsc_table_ops);
b8918839 LP	369	debugfs_create_file("carveout_memories", 0400, rproc->dbg_dir,
b8918839 LP	370	rproc, &rproc_carveouts_ops);
6391a706 OBC	371	}
	372
	373	void __init rproc_init_debugfs(void)
	374	{
	375	if (debugfs_initialized()) {
	376	rproc_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
	377	if (!rproc_dbg)
	378	pr_err("can't create debugfs dir\n");
	379	}
	380	}
	381
	382	void __exit rproc_exit_debugfs(void)
	383	{
57971159	384	debugfs_remove(rproc_dbg);
6391a706	385	}