[deliverable/linux.git] / drivers / gpu / drm / msm / msm_rd.c

/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/* For debugging crashes, userspace can:
 *
 *   tail -f /sys/kernel/debug/dri/<minor>/rd > logfile.rd
 *
 * To log the cmdstream in a format that is understood by freedreno/cffdump
 * utility.  By comparing the last successfully completed fence #, to the
 * cmdstream for the next fence, you can narrow down which process and submit
 * caused the gpu crash/lockup.
 *
 * This bypasses drm_debugfs_create_files() mainly because we need to use
 * our own fops for a bit more control.  In particular, we don't want to
 * do anything if userspace doesn't have the debugfs file open.
 *
 * The module-param "rd_full", which defaults to false, enables snapshotting
 * all (non-written) buffers in the submit, rather than just cmdstream bo's.
 * This is useful to capture the contents of (for example) vbo's or textures,
 * or shader programs (if not emitted inline in cmdstream).
 */

#ifdef CONFIG_DEBUG_FS

#include <linux/kfifo.h>
#include <linux/debugfs.h>
#include <linux/circ_buf.h>
#include <linux/wait.h>

#include "msm_drv.h"
#include "msm_gpu.h"
#include "msm_gem.h"

static bool rd_full = false;
MODULE_PARM_DESC(rd_full, "If true, $debugfs/.../rd will snapshot all buffer contents");
module_param_named(rd_full, rd_full, bool, 0600);

enum rd_sect_type {
	RD_NONE,
	RD_TEST,       /* ascii text */
	RD_CMD,        /* ascii text */
	RD_GPUADDR,    /* u32 gpuaddr, u32 size */
	RD_CONTEXT,    /* raw dump */
	RD_CMDSTREAM,  /* raw dump */
	RD_CMDSTREAM_ADDR, /* gpu addr of cmdstream */
	RD_PARAM,      /* u32 param_type, u32 param_val, u32 bitlen */
	RD_FLUSH,      /* empty, clear previous params */
	RD_PROGRAM,    /* shader program, raw dump */
	RD_VERT_SHADER,
	RD_FRAG_SHADER,
	RD_BUFFER_CONTENTS,
	RD_GPU_ID,
};

#define BUF_SZ 512  /* should be power of 2 */

/* space used: */
#define circ_count(circ) \
	(CIRC_CNT((circ)->head, (circ)->tail, BUF_SZ))
#define circ_count_to_end(circ) \
	(CIRC_CNT_TO_END((circ)->head, (circ)->tail, BUF_SZ))
/* space available: */
#define circ_space(circ) \
	(CIRC_SPACE((circ)->head, (circ)->tail, BUF_SZ))
#define circ_space_to_end(circ) \
	(CIRC_SPACE_TO_END((circ)->head, (circ)->tail, BUF_SZ))

struct msm_rd_state {
	struct drm_device *dev;

	bool open;

	struct dentry *ent;
	struct drm_info_node *node;

	/* current submit to read out: */
	struct msm_gem_submit *submit;

	/* fifo access is synchronized on the producer side by
	 * struct_mutex held by submit code (otherwise we could
	 * end up w/ cmds logged in different order than they
	 * were executed).  And read_lock synchronizes the reads
	 */
	struct mutex read_lock;

	wait_queue_head_t fifo_event;
	struct circ_buf fifo;

	char buf[BUF_SZ];
};

static void rd_write(struct msm_rd_state *rd, const void *buf, int sz)
{
	struct circ_buf *fifo = &rd->fifo;
	const char *ptr = buf;

	while (sz > 0) {
		char *fptr = &fifo->buf[fifo->head];
		int n;

		wait_event(rd->fifo_event, circ_space(&rd->fifo) > 0);

		n = min(sz, circ_space_to_end(&rd->fifo));
		memcpy(fptr, ptr, n);

		fifo->head = (fifo->head + n) & (BUF_SZ - 1);
		sz  -= n;
		ptr += n;

		wake_up_all(&rd->fifo_event);
	}
}

static void rd_write_section(struct msm_rd_state *rd,
		enum rd_sect_type type, const void *buf, int sz)
{
	rd_write(rd, &type, 4);
	rd_write(rd, &sz, 4);
	rd_write(rd, buf, sz);
}

static ssize_t rd_read(struct file *file, char __user *buf,
		size_t sz, loff_t *ppos)
{
	struct msm_rd_state *rd = file->private_data;
	struct circ_buf *fifo = &rd->fifo;
	const char *fptr = &fifo->buf[fifo->tail];
	int n = 0, ret = 0;

	mutex_lock(&rd->read_lock);

	ret = wait_event_interruptible(rd->fifo_event,
			circ_count(&rd->fifo) > 0);
	if (ret)
		goto out;

	n = min_t(int, sz, circ_count_to_end(&rd->fifo));
	if (copy_to_user(buf, fptr, n)) {
		ret = -EFAULT;
		goto out;
	}

	fifo->tail = (fifo->tail + n) & (BUF_SZ - 1);
	*ppos += n;

	wake_up_all(&rd->fifo_event);

out:
	mutex_unlock(&rd->read_lock);
	if (ret)
		return ret;
	return n;
}

static int rd_open(struct inode *inode, struct file *file)
{
	struct msm_rd_state *rd = inode->i_private;
	struct drm_device *dev = rd->dev;
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_gpu *gpu = priv->gpu;
	uint64_t val;
	uint32_t gpu_id;
	int ret = 0;

	mutex_lock(&dev->struct_mutex);

	if (rd->open || !gpu) {
		ret = -EBUSY;
		goto out;
	}

	file->private_data = rd;
	rd->open = true;

	/* the parsing tools need to know gpu-id to know which
	 * register database to load.
	 */
	gpu->funcs->get_param(gpu, MSM_PARAM_GPU_ID, &val);
	gpu_id = val;

	rd_write_section(rd, RD_GPU_ID, &gpu_id, sizeof(gpu_id));

out:
	mutex_unlock(&dev->struct_mutex);
	return ret;
}

static int rd_release(struct inode *inode, struct file *file)
{
	struct msm_rd_state *rd = inode->i_private;
	rd->open = false;
	return 0;
}


static const struct file_operations rd_debugfs_fops = {
	.owner = THIS_MODULE,
	.open = rd_open,
	.read = rd_read,
	.llseek = no_llseek,
	.release = rd_release,
};

int msm_rd_debugfs_init(struct drm_minor *minor)
{
	struct msm_drm_private *priv = minor->dev->dev_private;
	struct msm_rd_state *rd;

	/* only create on first minor: */
	if (priv->rd)
		return 0;

	rd = kzalloc(sizeof(*rd), GFP_KERNEL);
	if (!rd)
		return -ENOMEM;

	rd->dev = minor->dev;
	rd->fifo.buf = rd->buf;

	mutex_init(&rd->read_lock);
	priv->rd = rd;

	init_waitqueue_head(&rd->fifo_event);

	rd->node = kzalloc(sizeof(*rd->node), GFP_KERNEL);
	if (!rd->node)
		goto fail;

	rd->ent = debugfs_create_file("rd", S_IFREG | S_IRUGO,
			minor->debugfs_root, rd, &rd_debugfs_fops);
	if (!rd->ent) {
		DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/rd\n",
				minor->debugfs_root);
		goto fail;
	}

	rd->node->minor = minor;
	rd->node->dent  = rd->ent;
	rd->node->info_ent = NULL;

	mutex_lock(&minor->debugfs_lock);
	list_add(&rd->node->list, &minor->debugfs_list);
	mutex_unlock(&minor->debugfs_lock);

	return 0;

fail:
	msm_rd_debugfs_cleanup(minor);
	return -1;
}

void msm_rd_debugfs_cleanup(struct drm_minor *minor)
{
	struct msm_drm_private *priv = minor->dev->dev_private;
	struct msm_rd_state *rd = priv->rd;

	if (!rd)
		return;

	priv->rd = NULL;

	debugfs_remove(rd->ent);

	if (rd->node) {
		mutex_lock(&minor->debugfs_lock);
		list_del(&rd->node->list);
		mutex_unlock(&minor->debugfs_lock);
		kfree(rd->node);
	}

	mutex_destroy(&rd->read_lock);

	kfree(rd);
}

static void snapshot_buf(struct msm_rd_state *rd,
		struct msm_gem_submit *submit, int idx,
		uint32_t iova, uint32_t size)
{
	struct msm_gem_object *obj = submit->bos[idx].obj;
	const char *buf;

	buf = msm_gem_get_vaddr_locked(&obj->base);
	if (IS_ERR(buf))
		return;

	if (iova) {
		buf += iova - submit->bos[idx].iova;
	} else {
		iova = submit->bos[idx].iova;
		size = obj->base.size;
	}

	rd_write_section(rd, RD_GPUADDR,
			(uint32_t[2]){ iova, size }, 8);
	rd_write_section(rd, RD_BUFFER_CONTENTS, buf, size);

	msm_gem_put_vaddr_locked(&obj->base);
}

/* called under struct_mutex */
void msm_rd_dump_submit(struct msm_gem_submit *submit)
{
	struct drm_device *dev = submit->dev;
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_rd_state *rd = priv->rd;
	char msg[128];
	int i, n;

	if (!rd->open)
		return;

	/* writing into fifo is serialized by caller, and
	 * rd->read_lock is used to serialize the reads
	 */
	WARN_ON(!mutex_is_locked(&dev->struct_mutex));

	n = snprintf(msg, sizeof(msg), "%.*s/%d: fence=%u",
			TASK_COMM_LEN, current->comm, task_pid_nr(current),
			submit->fence->seqno);

	rd_write_section(rd, RD_CMD, msg, ALIGN(n, 4));

	if (rd_full) {
		for (i = 0; i < submit->nr_bos; i++) {
			/* buffers that are written to probably don't start out
			 * with anything interesting:
			 */
			if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
				continue;

			snapshot_buf(rd, submit, i, 0, 0);
		}
	}

	for (i = 0; i < submit->nr_cmds; i++) {
		uint32_t iova = submit->cmd[i].iova;
		uint32_t szd  = submit->cmd[i].size; /* in dwords */

		/* snapshot cmdstream bo's (if we haven't already): */
		if (!rd_full) {
			snapshot_buf(rd, submit, submit->cmd[i].idx,
					submit->cmd[i].iova, szd * 4);
		}

		switch (submit->cmd[i].type) {
		case MSM_SUBMIT_CMD_IB_TARGET_BUF:
			/* ignore IB-targets, we've logged the buffer, the
			 * parser tool will follow the IB based on the logged
			 * buffer/gpuaddr, so nothing more to do.
			 */
			break;
		case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
		case MSM_SUBMIT_CMD_BUF:
			rd_write_section(rd, RD_CMDSTREAM_ADDR,
					(uint32_t[2]){ iova, szd }, 8);
			break;
		}
	}
}
#endif
Commit	Line	Data
a7d3c950 RC	1	/*
	2	* Copyright (C) 2013 Red Hat
	3	* Author: Rob Clark <robdclark@gmail.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published by
	7	* the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program. If not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	/* For debugging crashes, userspace can:
	19	*
	20	* tail -f /sys/kernel/debug/dri/<minor>/rd > logfile.rd
	21	*
	22	* To log the cmdstream in a format that is understood by freedreno/cffdump
	23	* utility. By comparing the last successfully completed fence #, to the
	24	* cmdstream for the next fence, you can narrow down which process and submit
	25	* caused the gpu crash/lockup.
	26	*
	27	* This bypasses drm_debugfs_create_files() mainly because we need to use
	28	* our own fops for a bit more control. In particular, we don't want to
	29	* do anything if userspace doesn't have the debugfs file open.
79c21187 RC	30	*
	31	* The module-param "rd_full", which defaults to false, enables snapshotting
	32	* all (non-written) buffers in the submit, rather than just cmdstream bo's.
	33	* This is useful to capture the contents of (for example) vbo's or textures,
	34	* or shader programs (if not emitted inline in cmdstream).
a7d3c950 RC	35	*/
	36
	37	#ifdef CONFIG_DEBUG_FS
	38
	39	#include <linux/kfifo.h>
	40	#include <linux/debugfs.h>
	41	#include <linux/circ_buf.h>
	42	#include <linux/wait.h>
	43
	44	#include "msm_drv.h"
	45	#include "msm_gpu.h"
	46	#include "msm_gem.h"
	47
79c21187 RC	48	static bool rd_full = false;
	49	MODULE_PARM_DESC(rd_full, "If true, $debugfs/.../rd will snapshot all buffer contents");
	50	module_param_named(rd_full, rd_full, bool, 0600);
	51
a7d3c950 RC	52	enum rd_sect_type {
	53	RD_NONE,
	54	RD_TEST, /* ascii text */
	55	RD_CMD, /* ascii text */
	56	RD_GPUADDR, /* u32 gpuaddr, u32 size */
	57	RD_CONTEXT, /* raw dump */
	58	RD_CMDSTREAM, /* raw dump */
	59	RD_CMDSTREAM_ADDR, /* gpu addr of cmdstream */
	60	RD_PARAM, /* u32 param_type, u32 param_val, u32 bitlen */
	61	RD_FLUSH, /* empty, clear previous params */
	62	RD_PROGRAM, /* shader program, raw dump */
	63	RD_VERT_SHADER,
	64	RD_FRAG_SHADER,
	65	RD_BUFFER_CONTENTS,
	66	RD_GPU_ID,
	67	};
	68
	69	#define BUF_SZ 512 /* should be power of 2 */
	70
	71	/* space used: */
	72	#define circ_count(circ) \
	73	(CIRC_CNT((circ)->head, (circ)->tail, BUF_SZ))
	74	#define circ_count_to_end(circ) \
	75	(CIRC_CNT_TO_END((circ)->head, (circ)->tail, BUF_SZ))
	76	/* space available: */
	77	#define circ_space(circ) \
	78	(CIRC_SPACE((circ)->head, (circ)->tail, BUF_SZ))
	79	#define circ_space_to_end(circ) \
	80	(CIRC_SPACE_TO_END((circ)->head, (circ)->tail, BUF_SZ))
	81
	82	struct msm_rd_state {
	83	struct drm_device *dev;
	84
	85	bool open;
	86
	87	struct dentry *ent;
	88	struct drm_info_node *node;
	89
	90	/* current submit to read out: */
	91	struct msm_gem_submit *submit;
	92
	93	/* fifo access is synchronized on the producer side by
	94	* struct_mutex held by submit code (otherwise we could
	95	* end up w/ cmds logged in different order than they
	96	* were executed). And read_lock synchronizes the reads
	97	*/
	98	struct mutex read_lock;
	99
	100	wait_queue_head_t fifo_event;
	101	struct circ_buf fifo;
	102
	103	char buf[BUF_SZ];
	104	};
	105
	106	static void rd_write(struct msm_rd_state rd, const void buf, int sz)
	107	{
	108	struct circ_buf *fifo = &rd->fifo;
	109	const char *ptr = buf;
	110
	111	while (sz > 0) {
	112	char *fptr = &fifo->buf[fifo->head];
	113	int n;
	114
	115	wait_event(rd->fifo_event, circ_space(&rd->fifo) > 0);
116
117	n = min(sz, circ_space_to_end(&rd->fifo));
118	memcpy(fptr, ptr, n);
119
120	fifo->head = (fifo->head + n) & (BUF_SZ - 1);
121	sz -= n;
122	ptr += n;
123
124	wake_up_all(&rd->fifo_event);
125	}
126	}
127
128	static void rd_write_section(struct msm_rd_state *rd,
129	enum rd_sect_type type, const void *buf, int sz)
130	{
131	rd_write(rd, &type, 4);
132	rd_write(rd, &sz, 4);
133	rd_write(rd, buf, sz);
134	}
135
136	static ssize_t rd_read(struct file file, char __user buf,
137	size_t sz, loff_t *ppos)
138	{
139	struct msm_rd_state *rd = file->private_data;
140	struct circ_buf *fifo = &rd->fifo;
141	const char *fptr = &fifo->buf[fifo->tail];
142	int n = 0, ret = 0;
143
144	mutex_lock(&rd->read_lock);
145
146	ret = wait_event_interruptible(rd->fifo_event,
147	circ_count(&rd->fifo) > 0);
148	if (ret)
149	goto out;
150
151	n = min_t(int, sz, circ_count_to_end(&rd->fifo));
5745d21f DC	152	if (copy_to_user(buf, fptr, n)) {
5745d21f DC	153	ret = -EFAULT;
a7d3c950	154	goto out;
5745d21f	155	}
a7d3c950 RC	156
	157	fifo->tail = (fifo->tail + n) & (BUF_SZ - 1);
	158	*ppos += n;
	159
	160	wake_up_all(&rd->fifo_event);
	161
	162	out:
	163	mutex_unlock(&rd->read_lock);
	164	if (ret)
	165	return ret;
	166	return n;
	167	}
	168
	169	static int rd_open(struct inode inode, struct file file)
	170	{
	171	struct msm_rd_state *rd = inode->i_private;
	172	struct drm_device *dev = rd->dev;
	173	struct msm_drm_private *priv = dev->dev_private;
	174	struct msm_gpu *gpu = priv->gpu;
	175	uint64_t val;
	176	uint32_t gpu_id;
	177	int ret = 0;
	178
	179	mutex_lock(&dev->struct_mutex);
	180
	181	if (rd->open \|\| !gpu) {
	182	ret = -EBUSY;
	183	goto out;
	184	}
	185
	186	file->private_data = rd;
	187	rd->open = true;
	188
	189	/* the parsing tools need to know gpu-id to know which
	190	* register database to load.
	191	*/
	192	gpu->funcs->get_param(gpu, MSM_PARAM_GPU_ID, &val);
	193	gpu_id = val;
	194
	195	rd_write_section(rd, RD_GPU_ID, &gpu_id, sizeof(gpu_id));
	196
	197	out:
	198	mutex_unlock(&dev->struct_mutex);
	199	return ret;
	200	}
	201
	202	static int rd_release(struct inode inode, struct file file)
	203	{
	204	struct msm_rd_state *rd = inode->i_private;
	205	rd->open = false;
	206	return 0;
	207	}
	208
	209
	210	static const struct file_operations rd_debugfs_fops = {
	211	.owner = THIS_MODULE,
	212	.open = rd_open,
	213	.read = rd_read,
	214	.llseek = no_llseek,
	215	.release = rd_release,
	216	};
	217
	218	int msm_rd_debugfs_init(struct drm_minor *minor)
	219	{
220	struct msm_drm_private *priv = minor->dev->dev_private;
221	struct msm_rd_state *rd;
222
223	/* only create on first minor: */
224	if (priv->rd)
225	return 0;
226
227	rd = kzalloc(sizeof(*rd), GFP_KERNEL);
228	if (!rd)
229	return -ENOMEM;
230
231	rd->dev = minor->dev;
232	rd->fifo.buf = rd->buf;
233
234	mutex_init(&rd->read_lock);
235	priv->rd = rd;
236
237	init_waitqueue_head(&rd->fifo_event);
238
239	rd->node = kzalloc(sizeof(*rd->node), GFP_KERNEL);
240	if (!rd->node)
241	goto fail;
242
243	rd->ent = debugfs_create_file("rd", S_IFREG \| S_IRUGO,
244	minor->debugfs_root, rd, &rd_debugfs_fops);
245	if (!rd->ent) {
bcd599e7 AV	246	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/rd\n",
bcd599e7 AV	247	minor->debugfs_root);
a7d3c950 RC	248	goto fail;
	249	}
	250
	251	rd->node->minor = minor;
	252	rd->node->dent = rd->ent;
	253	rd->node->info_ent = NULL;
	254
	255	mutex_lock(&minor->debugfs_lock);
	256	list_add(&rd->node->list, &minor->debugfs_list);
	257	mutex_unlock(&minor->debugfs_lock);
	258
	259	return 0;
	260
	261	fail:
	262	msm_rd_debugfs_cleanup(minor);
	263	return -1;
	264	}
	265
	266	void msm_rd_debugfs_cleanup(struct drm_minor *minor)
	267	{
	268	struct msm_drm_private *priv = minor->dev->dev_private;
	269	struct msm_rd_state *rd = priv->rd;
	270
	271	if (!rd)
	272	return;
	273
	274	priv->rd = NULL;
	275
	276	debugfs_remove(rd->ent);
	277
	278	if (rd->node) {
	279	mutex_lock(&minor->debugfs_lock);
	280	list_del(&rd->node->list);
	281	mutex_unlock(&minor->debugfs_lock);
	282	kfree(rd->node);
	283	}
	284
	285	mutex_destroy(&rd->read_lock);
	286
	287	kfree(rd);
	288	}
	289
6507e799 RC	290	static void snapshot_buf(struct msm_rd_state *rd,
	291	struct msm_gem_submit *submit, int idx,
	292	uint32_t iova, uint32_t size)
	293	{
	294	struct msm_gem_object *obj = submit->bos[idx].obj;
	295	const char *buf;
	296
	297	buf = msm_gem_get_vaddr_locked(&obj->base);
	298	if (IS_ERR(buf))
	299	return;
	300
79c21187 RC	301	if (iova) {
	302	buf += iova - submit->bos[idx].iova;
	303	} else {
	304	iova = submit->bos[idx].iova;
	305	size = obj->base.size;
	306	}
6507e799 RC	307
	308	rd_write_section(rd, RD_GPUADDR,
	309	(uint32_t[2]){ iova, size }, 8);
	310	rd_write_section(rd, RD_BUFFER_CONTENTS, buf, size);
	311
	312	msm_gem_put_vaddr_locked(&obj->base);
	313	}
	314
a7d3c950 RC	315	/* called under struct_mutex */
	316	void msm_rd_dump_submit(struct msm_gem_submit *submit)
	317	{
	318	struct drm_device *dev = submit->dev;
	319	struct msm_drm_private *priv = dev->dev_private;
	320	struct msm_rd_state *rd = priv->rd;
	321	char msg[128];
	322	int i, n;
	323
	324	if (!rd->open)
	325	return;
	326
	327	/* writing into fifo is serialized by caller, and
	328	* rd->read_lock is used to serialize the reads
	329	*/
	330	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
	331
	332	n = snprintf(msg, sizeof(msg), "%.*s/%d: fence=%u",
	333	TASK_COMM_LEN, current->comm, task_pid_nr(current),
b6295f9a	334	submit->fence->seqno);
a7d3c950 RC	335
	336	rd_write_section(rd, RD_CMD, msg, ALIGN(n, 4));
	337
79c21187 RC	338	if (rd_full) {
	339	for (i = 0; i < submit->nr_bos; i++) {
	340	/* buffers that are written to probably don't start out
	341	* with anything interesting:
	342	*/
	343	if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
	344	continue;
	345
	346	snapshot_buf(rd, submit, i, 0, 0);
	347	}
	348	}
a7d3c950 RC	349
a7d3c950 RC	350	for (i = 0; i < submit->nr_cmds; i++) {
a7d3c950 RC	351	uint32_t iova = submit->cmd[i].iova;
a7d3c950 RC	352	uint32_t szd = submit->cmd[i].size; /* in dwords */
69a834c2	353
79c21187 RC	354	/* snapshot cmdstream bo's (if we haven't already): */
	355	if (!rd_full) {
	356	snapshot_buf(rd, submit, submit->cmd[i].idx,
	357	submit->cmd[i].iova, szd * 4);
	358	}
a7d3c950 RC	359
	360	switch (submit->cmd[i].type) {
	361	case MSM_SUBMIT_CMD_IB_TARGET_BUF:
	362	/* ignore IB-targets, we've logged the buffer, the
	363	* parser tool will follow the IB based on the logged
	364	* buffer/gpuaddr, so nothing more to do.
	365	*/
	366	break;
	367	case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
	368	case MSM_SUBMIT_CMD_BUF:
	369	rd_write_section(rd, RD_CMDSTREAM_ADDR,
	370	(uint32_t[2]){ iova, szd }, 8);
	371	break;
	372	}
	373	}
	374	}
	375	#endif