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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.
30 */
31
32#ifdef CONFIG_DEBUG_FS
33
34#include <linux/kfifo.h>
35#include <linux/debugfs.h>
36#include <linux/circ_buf.h>
37#include <linux/wait.h>
38
39#include "msm_drv.h"
40#include "msm_gpu.h"
41#include "msm_gem.h"
42
43enum rd_sect_type {
44 RD_NONE,
45 RD_TEST, /* ascii text */
46 RD_CMD, /* ascii text */
47 RD_GPUADDR, /* u32 gpuaddr, u32 size */
48 RD_CONTEXT, /* raw dump */
49 RD_CMDSTREAM, /* raw dump */
50 RD_CMDSTREAM_ADDR, /* gpu addr of cmdstream */
51 RD_PARAM, /* u32 param_type, u32 param_val, u32 bitlen */
52 RD_FLUSH, /* empty, clear previous params */
53 RD_PROGRAM, /* shader program, raw dump */
54 RD_VERT_SHADER,
55 RD_FRAG_SHADER,
56 RD_BUFFER_CONTENTS,
57 RD_GPU_ID,
58};
59
60#define BUF_SZ 512 /* should be power of 2 */
61
62/* space used: */
63#define circ_count(circ) \
64 (CIRC_CNT((circ)->head, (circ)->tail, BUF_SZ))
65#define circ_count_to_end(circ) \
66 (CIRC_CNT_TO_END((circ)->head, (circ)->tail, BUF_SZ))
67/* space available: */
68#define circ_space(circ) \
69 (CIRC_SPACE((circ)->head, (circ)->tail, BUF_SZ))
70#define circ_space_to_end(circ) \
71 (CIRC_SPACE_TO_END((circ)->head, (circ)->tail, BUF_SZ))
72
73struct msm_rd_state {
74 struct drm_device *dev;
75
76 bool open;
77
78 struct dentry *ent;
79 struct drm_info_node *node;
80
81 /* current submit to read out: */
82 struct msm_gem_submit *submit;
83
84 /* fifo access is synchronized on the producer side by
85 * struct_mutex held by submit code (otherwise we could
86 * end up w/ cmds logged in different order than they
87 * were executed). And read_lock synchronizes the reads
88 */
89 struct mutex read_lock;
90
91 wait_queue_head_t fifo_event;
92 struct circ_buf fifo;
93
94 char buf[BUF_SZ];
95};
96
97static void rd_write(struct msm_rd_state *rd, const void *buf, int sz)
98{
99 struct circ_buf *fifo = &rd->fifo;
100 const char *ptr = buf;
101
102 while (sz > 0) {
103 char *fptr = &fifo->buf[fifo->head];
104 int n;
105
106 wait_event(rd->fifo_event, circ_space(&rd->fifo) > 0);
107
108 n = min(sz, circ_space_to_end(&rd->fifo));
109 memcpy(fptr, ptr, n);
110
111 fifo->head = (fifo->head + n) & (BUF_SZ - 1);
112 sz -= n;
113 ptr += n;
114
115 wake_up_all(&rd->fifo_event);
116 }
117}
118
119static void rd_write_section(struct msm_rd_state *rd,
120 enum rd_sect_type type, const void *buf, int sz)
121{
122 rd_write(rd, &type, 4);
123 rd_write(rd, &sz, 4);
124 rd_write(rd, buf, sz);
125}
126
127static ssize_t rd_read(struct file *file, char __user *buf,
128 size_t sz, loff_t *ppos)
129{
130 struct msm_rd_state *rd = file->private_data;
131 struct circ_buf *fifo = &rd->fifo;
132 const char *fptr = &fifo->buf[fifo->tail];
133 int n = 0, ret = 0;
134
135 mutex_lock(&rd->read_lock);
136
137 ret = wait_event_interruptible(rd->fifo_event,
138 circ_count(&rd->fifo) > 0);
139 if (ret)
140 goto out;
141
142 n = min_t(int, sz, circ_count_to_end(&rd->fifo));
143 ret = copy_to_user(buf, fptr, n);
144 if (ret)
145 goto out;
146
147 fifo->tail = (fifo->tail + n) & (BUF_SZ - 1);
148 *ppos += n;
149
150 wake_up_all(&rd->fifo_event);
151
152out:
153 mutex_unlock(&rd->read_lock);
154 if (ret)
155 return ret;
156 return n;
157}
158
159static int rd_open(struct inode *inode, struct file *file)
160{
161 struct msm_rd_state *rd = inode->i_private;
162 struct drm_device *dev = rd->dev;
163 struct msm_drm_private *priv = dev->dev_private;
164 struct msm_gpu *gpu = priv->gpu;
165 uint64_t val;
166 uint32_t gpu_id;
167 int ret = 0;
168
169 mutex_lock(&dev->struct_mutex);
170
171 if (rd->open || !gpu) {
172 ret = -EBUSY;
173 goto out;
174 }
175
176 file->private_data = rd;
177 rd->open = true;
178
179 /* the parsing tools need to know gpu-id to know which
180 * register database to load.
181 */
182 gpu->funcs->get_param(gpu, MSM_PARAM_GPU_ID, &val);
183 gpu_id = val;
184
185 rd_write_section(rd, RD_GPU_ID, &gpu_id, sizeof(gpu_id));
186
187out:
188 mutex_unlock(&dev->struct_mutex);
189 return ret;
190}
191
192static int rd_release(struct inode *inode, struct file *file)
193{
194 struct msm_rd_state *rd = inode->i_private;
195 rd->open = false;
196 return 0;
197}
198
199
200static const struct file_operations rd_debugfs_fops = {
201 .owner = THIS_MODULE,
202 .open = rd_open,
203 .read = rd_read,
204 .llseek = no_llseek,
205 .release = rd_release,
206};
207
208int msm_rd_debugfs_init(struct drm_minor *minor)
209{
210 struct msm_drm_private *priv = minor->dev->dev_private;
211 struct msm_rd_state *rd;
212
213 /* only create on first minor: */
214 if (priv->rd)
215 return 0;
216
217 rd = kzalloc(sizeof(*rd), GFP_KERNEL);
218 if (!rd)
219 return -ENOMEM;
220
221 rd->dev = minor->dev;
222 rd->fifo.buf = rd->buf;
223
224 mutex_init(&rd->read_lock);
225 priv->rd = rd;
226
227 init_waitqueue_head(&rd->fifo_event);
228
229 rd->node = kzalloc(sizeof(*rd->node), GFP_KERNEL);
230 if (!rd->node)
231 goto fail;
232
233 rd->ent = debugfs_create_file("rd", S_IFREG | S_IRUGO,
234 minor->debugfs_root, rd, &rd_debugfs_fops);
235 if (!rd->ent) {
236 DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s/rd\n",
237 minor->debugfs_root->d_name.name);
238 goto fail;
239 }
240
241 rd->node->minor = minor;
242 rd->node->dent = rd->ent;
243 rd->node->info_ent = NULL;
244
245 mutex_lock(&minor->debugfs_lock);
246 list_add(&rd->node->list, &minor->debugfs_list);
247 mutex_unlock(&minor->debugfs_lock);
248
249 return 0;
250
251fail:
252 msm_rd_debugfs_cleanup(minor);
253 return -1;
254}
255
256void msm_rd_debugfs_cleanup(struct drm_minor *minor)
257{
258 struct msm_drm_private *priv = minor->dev->dev_private;
259 struct msm_rd_state *rd = priv->rd;
260
261 if (!rd)
262 return;
263
264 priv->rd = NULL;
265
266 debugfs_remove(rd->ent);
267
268 if (rd->node) {
269 mutex_lock(&minor->debugfs_lock);
270 list_del(&rd->node->list);
271 mutex_unlock(&minor->debugfs_lock);
272 kfree(rd->node);
273 }
274
275 mutex_destroy(&rd->read_lock);
276
277 kfree(rd);
278}
279
280/* called under struct_mutex */
281void msm_rd_dump_submit(struct msm_gem_submit *submit)
282{
283 struct drm_device *dev = submit->dev;
284 struct msm_drm_private *priv = dev->dev_private;
285 struct msm_rd_state *rd = priv->rd;
286 char msg[128];
287 int i, n;
288
289 if (!rd->open)
290 return;
291
292 /* writing into fifo is serialized by caller, and
293 * rd->read_lock is used to serialize the reads
294 */
295 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
296
297 n = snprintf(msg, sizeof(msg), "%.*s/%d: fence=%u",
298 TASK_COMM_LEN, current->comm, task_pid_nr(current),
299 submit->fence);
300
301 rd_write_section(rd, RD_CMD, msg, ALIGN(n, 4));
302
303 /* could be nice to have an option (module-param?) to snapshot
304 * all the bo's associated with the submit. Handy to see vtx
305 * buffers, etc. For now just the cmdstream bo's is enough.
306 */
307
308 for (i = 0; i < submit->nr_cmds; i++) {
309 uint32_t idx = submit->cmd[i].idx;
310 uint32_t iova = submit->cmd[i].iova;
311 uint32_t szd = submit->cmd[i].size; /* in dwords */
312 struct msm_gem_object *obj = submit->bos[idx].obj;
313 const char *buf = msm_gem_vaddr_locked(&obj->base);
314
315 buf += iova - submit->bos[idx].iova;
316
317 rd_write_section(rd, RD_GPUADDR,
318 (uint32_t[2]){ iova, szd * 4 }, 8);
319 rd_write_section(rd, RD_BUFFER_CONTENTS,
320 buf, szd * 4);
321
322 switch (submit->cmd[i].type) {
323 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
324 /* ignore IB-targets, we've logged the buffer, the
325 * parser tool will follow the IB based on the logged
326 * buffer/gpuaddr, so nothing more to do.
327 */
328 break;
329 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
330 case MSM_SUBMIT_CMD_BUF:
331 rd_write_section(rd, RD_CMDSTREAM_ADDR,
332 (uint32_t[2]){ iova, szd }, 8);
333 break;
334 }
335 }
336}
337#endif
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7/* For debugging crashes, userspace can:
8 *
9 * tail -f /sys/kernel/debug/dri/<minor>/rd > logfile.rd
10 *
11 * to log the cmdstream in a format that is understood by freedreno/cffdump
12 * utility. By comparing the last successfully completed fence #, to the
13 * cmdstream for the next fence, you can narrow down which process and submit
14 * caused the gpu crash/lockup.
15 *
16 * Additionally:
17 *
18 * tail -f /sys/kernel/debug/dri/<minor>/hangrd > logfile.rd
19 *
20 * will capture just the cmdstream from submits which triggered a GPU hang.
21 *
22 * This bypasses drm_debugfs_create_files() mainly because we need to use
23 * our own fops for a bit more control. In particular, we don't want to
24 * do anything if userspace doesn't have the debugfs file open.
25 *
26 * The module-param "rd_full", which defaults to false, enables snapshotting
27 * all (non-written) buffers in the submit, rather than just cmdstream bo's.
28 * This is useful to capture the contents of (for example) vbo's or textures,
29 * or shader programs (if not emitted inline in cmdstream).
30 */
31
32#include <linux/circ_buf.h>
33#include <linux/debugfs.h>
34#include <linux/kfifo.h>
35#include <linux/uaccess.h>
36#include <linux/wait.h>
37
38#include <drm/drm_file.h>
39
40#include "msm_drv.h"
41#include "msm_gpu.h"
42#include "msm_gem.h"
43
44bool rd_full = false;
45MODULE_PARM_DESC(rd_full, "If true, $debugfs/.../rd will snapshot all buffer contents");
46module_param_named(rd_full, rd_full, bool, 0600);
47
48#ifdef CONFIG_DEBUG_FS
49
50enum rd_sect_type {
51 RD_NONE,
52 RD_TEST, /* ascii text */
53 RD_CMD, /* ascii text */
54 RD_GPUADDR, /* u32 gpuaddr, u32 size */
55 RD_CONTEXT, /* raw dump */
56 RD_CMDSTREAM, /* raw dump */
57 RD_CMDSTREAM_ADDR, /* gpu addr of cmdstream */
58 RD_PARAM, /* u32 param_type, u32 param_val, u32 bitlen */
59 RD_FLUSH, /* empty, clear previous params */
60 RD_PROGRAM, /* shader program, raw dump */
61 RD_VERT_SHADER,
62 RD_FRAG_SHADER,
63 RD_BUFFER_CONTENTS,
64 RD_GPU_ID,
65 RD_CHIP_ID,
66};
67
68#define BUF_SZ 512 /* should be power of 2 */
69
70/* space used: */
71#define circ_count(circ) \
72 (CIRC_CNT((circ)->head, (circ)->tail, BUF_SZ))
73#define circ_count_to_end(circ) \
74 (CIRC_CNT_TO_END((circ)->head, (circ)->tail, BUF_SZ))
75/* space available: */
76#define circ_space(circ) \
77 (CIRC_SPACE((circ)->head, (circ)->tail, BUF_SZ))
78#define circ_space_to_end(circ) \
79 (CIRC_SPACE_TO_END((circ)->head, (circ)->tail, BUF_SZ))
80
81struct msm_rd_state {
82 struct drm_device *dev;
83
84 bool open;
85
86 /* fifo access is synchronized on the producer side by
87 * write_lock. And read_lock synchronizes the reads
88 */
89 struct mutex read_lock, write_lock;
90
91 wait_queue_head_t fifo_event;
92 struct circ_buf fifo;
93
94 char buf[BUF_SZ];
95};
96
97static void rd_write(struct msm_rd_state *rd, const void *buf, int sz)
98{
99 struct circ_buf *fifo = &rd->fifo;
100 const char *ptr = buf;
101
102 while (sz > 0) {
103 char *fptr = &fifo->buf[fifo->head];
104 int n;
105
106 wait_event(rd->fifo_event, circ_space(&rd->fifo) > 0 || !rd->open);
107 if (!rd->open)
108 return;
109
110 /* Note that smp_load_acquire() is not strictly required
111 * as CIRC_SPACE_TO_END() does not access the tail more
112 * than once.
113 */
114 n = min(sz, circ_space_to_end(&rd->fifo));
115 memcpy(fptr, ptr, n);
116
117 smp_store_release(&fifo->head, (fifo->head + n) & (BUF_SZ - 1));
118 sz -= n;
119 ptr += n;
120
121 wake_up_all(&rd->fifo_event);
122 }
123}
124
125static void rd_write_section(struct msm_rd_state *rd,
126 enum rd_sect_type type, const void *buf, int sz)
127{
128 rd_write(rd, &type, 4);
129 rd_write(rd, &sz, 4);
130 rd_write(rd, buf, sz);
131}
132
133static ssize_t rd_read(struct file *file, char __user *buf,
134 size_t sz, loff_t *ppos)
135{
136 struct msm_rd_state *rd = file->private_data;
137 struct circ_buf *fifo = &rd->fifo;
138 const char *fptr = &fifo->buf[fifo->tail];
139 int n = 0, ret = 0;
140
141 mutex_lock(&rd->read_lock);
142
143 ret = wait_event_interruptible(rd->fifo_event,
144 circ_count(&rd->fifo) > 0);
145 if (ret)
146 goto out;
147
148 /* Note that smp_load_acquire() is not strictly required
149 * as CIRC_CNT_TO_END() does not access the head more than
150 * once.
151 */
152 n = min_t(int, sz, circ_count_to_end(&rd->fifo));
153 if (copy_to_user(buf, fptr, n)) {
154 ret = -EFAULT;
155 goto out;
156 }
157
158 smp_store_release(&fifo->tail, (fifo->tail + n) & (BUF_SZ - 1));
159 *ppos += n;
160
161 wake_up_all(&rd->fifo_event);
162
163out:
164 mutex_unlock(&rd->read_lock);
165 if (ret)
166 return ret;
167 return n;
168}
169
170static int rd_open(struct inode *inode, struct file *file)
171{
172 struct msm_rd_state *rd = inode->i_private;
173 struct drm_device *dev = rd->dev;
174 struct msm_drm_private *priv = dev->dev_private;
175 struct msm_gpu *gpu = priv->gpu;
176 uint64_t val;
177 uint32_t gpu_id;
178 uint32_t zero = 0;
179 int ret = 0;
180
181 if (!gpu)
182 return -ENODEV;
183
184 mutex_lock(&gpu->lock);
185
186 if (rd->open) {
187 ret = -EBUSY;
188 goto out;
189 }
190
191 file->private_data = rd;
192 rd->open = true;
193
194 /* Reset fifo to clear any previously unread data: */
195 rd->fifo.head = rd->fifo.tail = 0;
196
197 /* the parsing tools need to know gpu-id to know which
198 * register database to load.
199 *
200 * Note: These particular params do not require a context
201 */
202 gpu->funcs->get_param(gpu, NULL, MSM_PARAM_GPU_ID, &val, &zero);
203 gpu_id = val;
204
205 rd_write_section(rd, RD_GPU_ID, &gpu_id, sizeof(gpu_id));
206
207 gpu->funcs->get_param(gpu, NULL, MSM_PARAM_CHIP_ID, &val, &zero);
208 rd_write_section(rd, RD_CHIP_ID, &val, sizeof(val));
209
210out:
211 mutex_unlock(&gpu->lock);
212 return ret;
213}
214
215static int rd_release(struct inode *inode, struct file *file)
216{
217 struct msm_rd_state *rd = inode->i_private;
218
219 rd->open = false;
220 wake_up_all(&rd->fifo_event);
221
222 return 0;
223}
224
225
226static const struct file_operations rd_debugfs_fops = {
227 .owner = THIS_MODULE,
228 .open = rd_open,
229 .read = rd_read,
230 .release = rd_release,
231};
232
233
234static void rd_cleanup(struct msm_rd_state *rd)
235{
236 if (!rd)
237 return;
238
239 mutex_destroy(&rd->read_lock);
240 mutex_destroy(&rd->write_lock);
241 kfree(rd);
242}
243
244static struct msm_rd_state *rd_init(struct drm_minor *minor, const char *name)
245{
246 struct msm_rd_state *rd;
247
248 rd = kzalloc(sizeof(*rd), GFP_KERNEL);
249 if (!rd)
250 return ERR_PTR(-ENOMEM);
251
252 rd->dev = minor->dev;
253 rd->fifo.buf = rd->buf;
254
255 mutex_init(&rd->read_lock);
256 mutex_init(&rd->write_lock);
257
258 init_waitqueue_head(&rd->fifo_event);
259
260 debugfs_create_file(name, S_IFREG | S_IRUGO, minor->debugfs_root, rd,
261 &rd_debugfs_fops);
262
263 return rd;
264}
265
266int msm_rd_debugfs_init(struct drm_minor *minor)
267{
268 struct msm_drm_private *priv = minor->dev->dev_private;
269 struct msm_rd_state *rd;
270 int ret;
271
272 if (!priv->gpu_pdev)
273 return 0;
274
275 /* only create on first minor: */
276 if (priv->rd)
277 return 0;
278
279 rd = rd_init(minor, "rd");
280 if (IS_ERR(rd)) {
281 ret = PTR_ERR(rd);
282 goto fail;
283 }
284
285 priv->rd = rd;
286
287 rd = rd_init(minor, "hangrd");
288 if (IS_ERR(rd)) {
289 ret = PTR_ERR(rd);
290 goto fail;
291 }
292
293 priv->hangrd = rd;
294
295 return 0;
296
297fail:
298 msm_rd_debugfs_cleanup(priv);
299 return ret;
300}
301
302void msm_rd_debugfs_cleanup(struct msm_drm_private *priv)
303{
304 rd_cleanup(priv->rd);
305 priv->rd = NULL;
306
307 rd_cleanup(priv->hangrd);
308 priv->hangrd = NULL;
309}
310
311static void snapshot_buf(struct msm_rd_state *rd,
312 struct msm_gem_submit *submit, int idx,
313 uint64_t iova, uint32_t size, bool full)
314{
315 struct drm_gem_object *obj = submit->bos[idx].obj;
316 unsigned offset = 0;
317 const char *buf;
318
319 if (iova) {
320 offset = iova - submit->bos[idx].iova;
321 } else {
322 iova = submit->bos[idx].iova;
323 size = obj->size;
324 }
325
326 /*
327 * Always write the GPUADDR header so can get a complete list of all the
328 * buffers in the cmd
329 */
330 rd_write_section(rd, RD_GPUADDR,
331 (uint32_t[3]){ iova, size, iova >> 32 }, 12);
332
333 if (!full)
334 return;
335
336 /* But only dump the contents of buffers marked READ */
337 if (!(submit->bos[idx].flags & MSM_SUBMIT_BO_READ))
338 return;
339
340 buf = msm_gem_get_vaddr_active(obj);
341 if (IS_ERR(buf))
342 return;
343
344 buf += offset;
345
346 rd_write_section(rd, RD_BUFFER_CONTENTS, buf, size);
347
348 msm_gem_put_vaddr_locked(obj);
349}
350
351/* called under gpu->lock */
352void msm_rd_dump_submit(struct msm_rd_state *rd, struct msm_gem_submit *submit,
353 const char *fmt, ...)
354{
355 struct task_struct *task;
356 char msg[256];
357 int i, n;
358
359 if (!rd->open)
360 return;
361
362 mutex_lock(&rd->write_lock);
363
364 if (fmt) {
365 va_list args;
366
367 va_start(args, fmt);
368 n = vscnprintf(msg, sizeof(msg), fmt, args);
369 va_end(args);
370
371 rd_write_section(rd, RD_CMD, msg, ALIGN(n, 4));
372 }
373
374 rcu_read_lock();
375 task = pid_task(submit->pid, PIDTYPE_PID);
376 if (task) {
377 n = scnprintf(msg, sizeof(msg), "%.*s/%d: fence=%u",
378 TASK_COMM_LEN, task->comm,
379 pid_nr(submit->pid), submit->seqno);
380 } else {
381 n = scnprintf(msg, sizeof(msg), "???/%d: fence=%u",
382 pid_nr(submit->pid), submit->seqno);
383 }
384 rcu_read_unlock();
385
386 rd_write_section(rd, RD_CMD, msg, ALIGN(n, 4));
387
388 for (i = 0; i < submit->nr_bos; i++)
389 snapshot_buf(rd, submit, i, 0, 0, should_dump(submit, i));
390
391 for (i = 0; i < submit->nr_cmds; i++) {
392 uint32_t szd = submit->cmd[i].size; /* in dwords */
393
394 /* snapshot cmdstream bo's (if we haven't already): */
395 if (!should_dump(submit, i)) {
396 snapshot_buf(rd, submit, submit->cmd[i].idx,
397 submit->cmd[i].iova, szd * 4, true);
398 }
399 }
400
401 for (i = 0; i < submit->nr_cmds; i++) {
402 uint64_t iova = submit->cmd[i].iova;
403 uint32_t szd = submit->cmd[i].size; /* in dwords */
404
405 switch (submit->cmd[i].type) {
406 case MSM_SUBMIT_CMD_IB_TARGET_BUF:
407 /* ignore IB-targets, we've logged the buffer, the
408 * parser tool will follow the IB based on the logged
409 * buffer/gpuaddr, so nothing more to do.
410 */
411 break;
412 case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
413 case MSM_SUBMIT_CMD_BUF:
414 rd_write_section(rd, RD_CMDSTREAM_ADDR,
415 (uint32_t[3]){ iova, szd, iova >> 32 }, 12);
416 break;
417 }
418 }
419
420 mutex_unlock(&rd->write_lock);
421}
422#endif