1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright 2020-2021 NXP
4 */
5
6#include <linux/init.h>
7#include <linux/device.h>
8#include <linux/ioctl.h>
9#include <linux/list.h>
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/types.h>
13#include <linux/pm_runtime.h>
14#include <media/v4l2-device.h>
15#include <linux/debugfs.h>
16#include "vpu.h"
17#include "vpu_defs.h"
18#include "vpu_core.h"
19#include "vpu_helpers.h"
20#include "vpu_cmds.h"
21#include "vpu_rpc.h"
22#include "vpu_v4l2.h"
23
24struct print_buf_desc {
25	u32 start_h_phy;
26	u32 start_h_vir;
27	u32 start_m;
28	u32 bytes;
29	u32 read;
30	u32 write;
31	char buffer[];
32};
33
34static char *vb2_stat_name[] = {
35	[VB2_BUF_STATE_DEQUEUED] = "dequeued",
36	[VB2_BUF_STATE_IN_REQUEST] = "in_request",
37	[VB2_BUF_STATE_PREPARING] = "preparing",
38	[VB2_BUF_STATE_QUEUED] = "queued",
39	[VB2_BUF_STATE_ACTIVE] = "active",
40	[VB2_BUF_STATE_DONE] = "done",
41	[VB2_BUF_STATE_ERROR] = "error",
42};
43
44static char *vpu_stat_name[] = {
45	[VPU_BUF_STATE_IDLE] = "idle",
46	[VPU_BUF_STATE_INUSE] = "inuse",
47	[VPU_BUF_STATE_DECODED] = "decoded",
48	[VPU_BUF_STATE_READY] = "ready",
49	[VPU_BUF_STATE_SKIP] = "skip",
50	[VPU_BUF_STATE_ERROR] = "error",
51};
52
53static inline const char *to_vpu_stat_name(int state)
54{
55	if (state <= VPU_BUF_STATE_ERROR)
56		return vpu_stat_name[state];
57	return "unknown";
58}
59
60static int vpu_dbg_instance(struct seq_file *s, void *data)
61{
62	struct vpu_inst *inst = s->private;
63	char str[128];
64	int num;
65	struct vb2_queue *vq;
66	int i;
67
68	if (!inst->fh.m2m_ctx)
69		return 0;
70	num = scnprintf(str, sizeof(str), "[%s]\n", vpu_core_type_desc(inst->type));
71	if (seq_write(s, str, num))
72		return 0;
73
74	num = scnprintf(str, sizeof(str), "tgig = %d,pid = %d\n", inst->tgid, inst->pid);
75	if (seq_write(s, str, num))
76		return 0;
77	num = scnprintf(str, sizeof(str), "state = %s\n", vpu_codec_state_name(inst->state));
78	if (seq_write(s, str, num))
79		return 0;
80	num = scnprintf(str, sizeof(str),
81			"min_buffer_out = %d, min_buffer_cap = %d\n",
82			inst->min_buffer_out, inst->min_buffer_cap);
83	if (seq_write(s, str, num))
84		return 0;
85
86	vq = v4l2_m2m_get_src_vq(inst->fh.m2m_ctx);
87	num = scnprintf(str, sizeof(str),
88			"output (%2d, %2d): fmt = %c%c%c%c %d x %d, %d;",
89			vb2_is_streaming(vq),
90			vq->num_buffers,
91			inst->out_format.pixfmt,
92			inst->out_format.pixfmt >> 8,
93			inst->out_format.pixfmt >> 16,
94			inst->out_format.pixfmt >> 24,
95			inst->out_format.width,
96			inst->out_format.height,
97			vq->last_buffer_dequeued);
98	if (seq_write(s, str, num))
99		return 0;
100	for (i = 0; i < inst->out_format.mem_planes; i++) {
101		num = scnprintf(str, sizeof(str), " %d(%d)",
102				vpu_get_fmt_plane_size(&inst->out_format, i),
103				inst->out_format.bytesperline[i]);
104		if (seq_write(s, str, num))
105			return 0;
106	}
107	if (seq_write(s, "\n", 1))
108		return 0;
109
110	vq = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx);
111	num = scnprintf(str, sizeof(str),
112			"capture(%2d, %2d): fmt = %c%c%c%c %d x %d, %d;",
113			vb2_is_streaming(vq),
114			vq->num_buffers,
115			inst->cap_format.pixfmt,
116			inst->cap_format.pixfmt >> 8,
117			inst->cap_format.pixfmt >> 16,
118			inst->cap_format.pixfmt >> 24,
119			inst->cap_format.width,
120			inst->cap_format.height,
121			vq->last_buffer_dequeued);
122	if (seq_write(s, str, num))
123		return 0;
124	for (i = 0; i < inst->cap_format.mem_planes; i++) {
125		num = scnprintf(str, sizeof(str), " %d(%d)",
126				vpu_get_fmt_plane_size(&inst->cap_format, i),
127				inst->cap_format.bytesperline[i]);
128		if (seq_write(s, str, num))
129			return 0;
130	}
131	if (seq_write(s, "\n", 1))
132		return 0;
133	num = scnprintf(str, sizeof(str), "crop: (%d, %d) %d x %d\n",
134			inst->crop.left,
135			inst->crop.top,
136			inst->crop.width,
137			inst->crop.height);
138	if (seq_write(s, str, num))
139		return 0;
140
141	vq = v4l2_m2m_get_src_vq(inst->fh.m2m_ctx);
142	for (i = 0; i < vq->num_buffers; i++) {
143		struct vb2_buffer *vb = vq->bufs[i];
144		struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
145
146		if (vb->state == VB2_BUF_STATE_DEQUEUED)
147			continue;
148		num = scnprintf(str, sizeof(str),
149				"output [%2d] state = %10s, %8s\n",
150				i, vb2_stat_name[vb->state],
151				to_vpu_stat_name(vpu_get_buffer_state(vbuf)));
152		if (seq_write(s, str, num))
153			return 0;
154	}
155
156	vq = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx);
157	for (i = 0; i < vq->num_buffers; i++) {
158		struct vb2_buffer *vb = vq->bufs[i];
159		struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
160
161		if (vb->state == VB2_BUF_STATE_DEQUEUED)
162			continue;
163		num = scnprintf(str, sizeof(str),
164				"capture[%2d] state = %10s, %8s\n",
165				i, vb2_stat_name[vb->state],
166				to_vpu_stat_name(vpu_get_buffer_state(vbuf)));
167		if (seq_write(s, str, num))
168			return 0;
169	}
170
171	num = scnprintf(str, sizeof(str), "sequence = %d\n", inst->sequence);
172	if (seq_write(s, str, num))
173		return 0;
174
175	if (inst->use_stream_buffer) {
176		num = scnprintf(str, sizeof(str), "stream_buffer = %d / %d, <%pad, 0x%x>\n",
177				vpu_helper_get_used_space(inst),
178				inst->stream_buffer.length,
179				&inst->stream_buffer.phys,
180				inst->stream_buffer.length);
181		if (seq_write(s, str, num))
182			return 0;
183	}
184	num = scnprintf(str, sizeof(str), "kfifo len = 0x%x\n", kfifo_len(&inst->msg_fifo));
185	if (seq_write(s, str, num))
186		return 0;
187
188	num = scnprintf(str, sizeof(str), "flow :\n");
189	if (seq_write(s, str, num))
190		return 0;
191
192	mutex_lock(&inst->core->cmd_lock);
193	for (i = 0; i < ARRAY_SIZE(inst->flows); i++) {
194		u32 idx = (inst->flow_idx + i) % (ARRAY_SIZE(inst->flows));
195
196		if (!inst->flows[idx])
197			continue;
198		num = scnprintf(str, sizeof(str), "\t[%s] %s\n",
199				inst->flows[idx] >= VPU_MSG_ID_NOOP ? "M" : "C",
200				vpu_id_name(inst->flows[idx]));
201		if (seq_write(s, str, num)) {
202			mutex_unlock(&inst->core->cmd_lock);
203			return 0;
204		}
205	}
206	mutex_unlock(&inst->core->cmd_lock);
207
208	i = 0;
209	while (true) {
210		num = call_vop(inst, get_debug_info, str, sizeof(str), i++);
211		if (num <= 0)
212			break;
213		if (seq_write(s, str, num))
214			return 0;
215	}
216
217	return 0;
218}
219
220static int vpu_dbg_core(struct seq_file *s, void *data)
221{
222	struct vpu_core *core = s->private;
223	struct vpu_shared_addr *iface = core->iface;
224	char str[128];
225	int num;
226
227	num = scnprintf(str, sizeof(str), "[%s]\n", vpu_core_type_desc(core->type));
228	if (seq_write(s, str, num))
229		return 0;
230
231	num = scnprintf(str, sizeof(str), "boot_region  = <%pad, 0x%x>\n",
232			&core->fw.phys, core->fw.length);
233	if (seq_write(s, str, num))
234		return 0;
235	num = scnprintf(str, sizeof(str), "rpc_region   = <%pad, 0x%x> used = 0x%x\n",
236			&core->rpc.phys, core->rpc.length, core->rpc.bytesused);
237	if (seq_write(s, str, num))
238		return 0;
239	num = scnprintf(str, sizeof(str), "fwlog_region = <%pad, 0x%x>\n",
240			&core->log.phys, core->log.length);
241	if (seq_write(s, str, num))
242		return 0;
243
244	num = scnprintf(str, sizeof(str), "power %s\n",
245			vpu_iface_get_power_state(core) ? "on" : "off");
246	if (seq_write(s, str, num))
247		return 0;
248	num = scnprintf(str, sizeof(str), "state = %d\n", core->state);
249	if (seq_write(s, str, num))
250		return 0;
251	if (core->state == VPU_CORE_DEINIT)
252		return 0;
253	num = scnprintf(str, sizeof(str), "fw version = %d.%d.%d\n",
254			(core->fw_version >> 16) & 0xff,
255			(core->fw_version >> 8) & 0xff,
256			core->fw_version & 0xff);
257	if (seq_write(s, str, num))
258		return 0;
259	num = scnprintf(str, sizeof(str), "instances = %d/%d (0x%02lx), %d\n",
260			hweight32(core->instance_mask),
261			core->supported_instance_count,
262			core->instance_mask,
263			core->request_count);
264	if (seq_write(s, str, num))
265		return 0;
266	num = scnprintf(str, sizeof(str), "kfifo len = 0x%x\n", kfifo_len(&core->msg_fifo));
267	if (seq_write(s, str, num))
268		return 0;
269	num = scnprintf(str, sizeof(str),
270			"cmd_buf:[0x%x, 0x%x], wptr = 0x%x, rptr = 0x%x\n",
271			iface->cmd_desc->start,
272			iface->cmd_desc->end,
273			iface->cmd_desc->wptr,
274			iface->cmd_desc->rptr);
275	if (seq_write(s, str, num))
276		return 0;
277	num = scnprintf(str, sizeof(str),
278			"msg_buf:[0x%x, 0x%x], wptr = 0x%x, rptr = 0x%x\n",
279			iface->msg_desc->start,
280			iface->msg_desc->end,
281			iface->msg_desc->wptr,
282			iface->msg_desc->rptr);
283	if (seq_write(s, str, num))
284		return 0;
285
286	return 0;
287}
288
289static int vpu_dbg_fwlog(struct seq_file *s, void *data)
290{
291	struct vpu_core *core = s->private;
292	struct print_buf_desc *print_buf;
293	int length;
294	u32 rptr;
295	u32 wptr;
296	int ret = 0;
297
298	if (!core->log.virt || core->state == VPU_CORE_DEINIT)
299		return 0;
300
301	print_buf = core->log.virt;
302	rptr = print_buf->read;
303	wptr = print_buf->write;
304
305	if (rptr == wptr)
306		return 0;
307	else if (rptr < wptr)
308		length = wptr - rptr;
309	else
310		length = print_buf->bytes + wptr - rptr;
311
312	if (s->count + length >= s->size) {
313		s->count = s->size;
314		return 0;
315	}
316
317	if (rptr + length >= print_buf->bytes) {
318		int num = print_buf->bytes - rptr;
319
320		if (seq_write(s, print_buf->buffer + rptr, num))
321			ret = -1;
322		length -= num;
323		rptr = 0;
324	}
325
326	if (length) {
327		if (seq_write(s, print_buf->buffer + rptr, length))
328			ret = -1;
329		rptr += length;
330	}
331	if (!ret)
332		print_buf->read = rptr;
333
334	return 0;
335}
336
337static int vpu_dbg_inst_open(struct inode *inode, struct file *filp)
338{
339	return single_open(filp, vpu_dbg_instance, inode->i_private);
340}
341
342static ssize_t vpu_dbg_inst_write(struct file *file,
343				  const char __user *user_buf, size_t size, loff_t *ppos)
344{
345	struct seq_file *s = file->private_data;
346	struct vpu_inst *inst = s->private;
347
348	vpu_session_debug(inst);
349
350	return size;
351}
352
353static ssize_t vpu_dbg_core_write(struct file *file,
354				  const char __user *user_buf, size_t size, loff_t *ppos)
355{
356	struct seq_file *s = file->private_data;
357	struct vpu_core *core = s->private;
358
359	pm_runtime_resume_and_get(core->dev);
360	mutex_lock(&core->lock);
361	if (vpu_iface_get_power_state(core) && !core->request_count) {
362		dev_info(core->dev, "reset\n");
363		if (!vpu_core_sw_reset(core)) {
364			vpu_core_set_state(core, VPU_CORE_ACTIVE);
365			core->hang_mask = 0;
366		}
367	}
368	mutex_unlock(&core->lock);
369	pm_runtime_put_sync(core->dev);
370
371	return size;
372}
373
374static int vpu_dbg_core_open(struct inode *inode, struct file *filp)
375{
376	return single_open(filp, vpu_dbg_core, inode->i_private);
377}
378
379static int vpu_dbg_fwlog_open(struct inode *inode, struct file *filp)
380{
381	return single_open(filp, vpu_dbg_fwlog, inode->i_private);
382}
383
384static const struct file_operations vpu_dbg_inst_fops = {
385	.owner = THIS_MODULE,
386	.open = vpu_dbg_inst_open,
387	.release = single_release,
388	.read = seq_read,
389	.write = vpu_dbg_inst_write,
390};
391
392static const struct file_operations vpu_dbg_core_fops = {
393	.owner = THIS_MODULE,
394	.open = vpu_dbg_core_open,
395	.release = single_release,
396	.read = seq_read,
397	.write = vpu_dbg_core_write,
398};
399
400static const struct file_operations vpu_dbg_fwlog_fops = {
401	.owner = THIS_MODULE,
402	.open = vpu_dbg_fwlog_open,
403	.release = single_release,
404	.read = seq_read,
405};
406
407int vpu_inst_create_dbgfs_file(struct vpu_inst *inst)
408{
409	struct vpu_dev *vpu;
410	char name[64];
411
412	if (!inst || !inst->core || !inst->core->vpu)
413		return -EINVAL;
414
415	vpu = inst->core->vpu;
416	if (!vpu->debugfs)
417		return -EINVAL;
418
419	if (inst->debugfs)
420		return 0;
421
422	scnprintf(name, sizeof(name), "instance.%d.%d", inst->core->id, inst->id);
423	inst->debugfs = debugfs_create_file((const char *)name,
424					    VERIFY_OCTAL_PERMISSIONS(0644),
425					    vpu->debugfs,
426					    inst,
427					    &vpu_dbg_inst_fops);
428
429	return 0;
430}
431
432int vpu_inst_remove_dbgfs_file(struct vpu_inst *inst)
433{
434	if (!inst)
435		return 0;
436
437	debugfs_remove(inst->debugfs);
438	inst->debugfs = NULL;
439
440	return 0;
441}
442
443int vpu_core_create_dbgfs_file(struct vpu_core *core)
444{
445	struct vpu_dev *vpu;
446	char name[64];
447
448	if (!core || !core->vpu)
449		return -EINVAL;
450
451	vpu = core->vpu;
452	if (!vpu->debugfs)
453		return -EINVAL;
454
455	if (!core->debugfs) {
456		scnprintf(name, sizeof(name), "core.%d", core->id);
457		core->debugfs = debugfs_create_file((const char *)name,
458						    VERIFY_OCTAL_PERMISSIONS(0644),
459						    vpu->debugfs,
460						    core,
461						    &vpu_dbg_core_fops);
462	}
463	if (!core->debugfs_fwlog) {
464		scnprintf(name, sizeof(name), "fwlog.%d", core->id);
465		core->debugfs_fwlog = debugfs_create_file((const char *)name,
466							  VERIFY_OCTAL_PERMISSIONS(0444),
467							  vpu->debugfs,
468							  core,
469							  &vpu_dbg_fwlog_fops);
470	}
471
472	return 0;
473}
474
475int vpu_core_remove_dbgfs_file(struct vpu_core *core)
476{
477	if (!core)
478		return 0;
479	debugfs_remove(core->debugfs);
480	core->debugfs = NULL;
481	debugfs_remove(core->debugfs_fwlog);
482	core->debugfs_fwlog = NULL;
483
484	return 0;
485}
486
487void vpu_inst_record_flow(struct vpu_inst *inst, u32 flow)
488{
489	if (!inst)
490		return;
491
492	inst->flows[inst->flow_idx] = flow;
493	inst->flow_idx = (inst->flow_idx + 1) % (ARRAY_SIZE(inst->flows));
494}
495