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1// SPDX-License-Identifier: GPL-2.0-only
2/* Copyright (c) 2017 The Linux Foundation. All rights reserved.
3 */
4
5#include <linux/kref.h>
6#include <linux/uaccess.h>
7
8#include "msm_gpu.h"
9
10int msm_file_private_set_sysprof(struct msm_file_private *ctx,
11 struct msm_gpu *gpu, int sysprof)
12{
13 /*
14 * Since pm_runtime and sysprof_active are both refcounts, we
15 * call apply the new value first, and then unwind the previous
16 * value
17 */
18
19 switch (sysprof) {
20 default:
21 return -EINVAL;
22 case 2:
23 pm_runtime_get_sync(&gpu->pdev->dev);
24 fallthrough;
25 case 1:
26 refcount_inc(&gpu->sysprof_active);
27 fallthrough;
28 case 0:
29 break;
30 }
31
32 /* unwind old value: */
33 switch (ctx->sysprof) {
34 case 2:
35 pm_runtime_put_autosuspend(&gpu->pdev->dev);
36 fallthrough;
37 case 1:
38 refcount_dec(&gpu->sysprof_active);
39 fallthrough;
40 case 0:
41 break;
42 }
43
44 ctx->sysprof = sysprof;
45
46 return 0;
47}
48
49void __msm_file_private_destroy(struct kref *kref)
50{
51 struct msm_file_private *ctx = container_of(kref,
52 struct msm_file_private, ref);
53 int i;
54
55 for (i = 0; i < ARRAY_SIZE(ctx->entities); i++) {
56 if (!ctx->entities[i])
57 continue;
58
59 drm_sched_entity_destroy(ctx->entities[i]);
60 kfree(ctx->entities[i]);
61 }
62
63 msm_gem_address_space_put(ctx->aspace);
64 kfree(ctx->comm);
65 kfree(ctx->cmdline);
66 kfree(ctx);
67}
68
69void msm_submitqueue_destroy(struct kref *kref)
70{
71 struct msm_gpu_submitqueue *queue = container_of(kref,
72 struct msm_gpu_submitqueue, ref);
73
74 idr_destroy(&queue->fence_idr);
75
76 msm_file_private_put(queue->ctx);
77
78 kfree(queue);
79}
80
81struct msm_gpu_submitqueue *msm_submitqueue_get(struct msm_file_private *ctx,
82 u32 id)
83{
84 struct msm_gpu_submitqueue *entry;
85
86 if (!ctx)
87 return NULL;
88
89 read_lock(&ctx->queuelock);
90
91 list_for_each_entry(entry, &ctx->submitqueues, node) {
92 if (entry->id == id) {
93 kref_get(&entry->ref);
94 read_unlock(&ctx->queuelock);
95
96 return entry;
97 }
98 }
99
100 read_unlock(&ctx->queuelock);
101 return NULL;
102}
103
104void msm_submitqueue_close(struct msm_file_private *ctx)
105{
106 struct msm_gpu_submitqueue *entry, *tmp;
107
108 if (!ctx)
109 return;
110
111 /*
112 * No lock needed in close and there won't
113 * be any more user ioctls coming our way
114 */
115 list_for_each_entry_safe(entry, tmp, &ctx->submitqueues, node) {
116 list_del(&entry->node);
117 msm_submitqueue_put(entry);
118 }
119}
120
121static struct drm_sched_entity *
122get_sched_entity(struct msm_file_private *ctx, struct msm_ringbuffer *ring,
123 unsigned ring_nr, enum drm_sched_priority sched_prio)
124{
125 static DEFINE_MUTEX(entity_lock);
126 unsigned idx = (ring_nr * NR_SCHED_PRIORITIES) + sched_prio;
127
128 /* We should have already validated that the requested priority is
129 * valid by the time we get here.
130 */
131 if (WARN_ON(idx >= ARRAY_SIZE(ctx->entities)))
132 return ERR_PTR(-EINVAL);
133
134 mutex_lock(&entity_lock);
135
136 if (!ctx->entities[idx]) {
137 struct drm_sched_entity *entity;
138 struct drm_gpu_scheduler *sched = &ring->sched;
139 int ret;
140
141 entity = kzalloc(sizeof(*ctx->entities[idx]), GFP_KERNEL);
142
143 ret = drm_sched_entity_init(entity, sched_prio, &sched, 1, NULL);
144 if (ret) {
145 mutex_unlock(&entity_lock);
146 kfree(entity);
147 return ERR_PTR(ret);
148 }
149
150 ctx->entities[idx] = entity;
151 }
152
153 mutex_unlock(&entity_lock);
154
155 return ctx->entities[idx];
156}
157
158int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
159 u32 prio, u32 flags, u32 *id)
160{
161 struct msm_drm_private *priv = drm->dev_private;
162 struct msm_gpu_submitqueue *queue;
163 enum drm_sched_priority sched_prio;
164 extern int enable_preemption;
165 bool preemption_supported;
166 unsigned ring_nr;
167 int ret;
168
169 if (!ctx)
170 return -ENODEV;
171
172 if (!priv->gpu)
173 return -ENODEV;
174
175 preemption_supported = priv->gpu->nr_rings == 1 && enable_preemption != 0;
176
177 if (flags & MSM_SUBMITQUEUE_ALLOW_PREEMPT && preemption_supported)
178 return -EINVAL;
179
180 ret = msm_gpu_convert_priority(priv->gpu, prio, &ring_nr, &sched_prio);
181 if (ret)
182 return ret;
183
184 queue = kzalloc(sizeof(*queue), GFP_KERNEL);
185
186 if (!queue)
187 return -ENOMEM;
188
189 kref_init(&queue->ref);
190 queue->flags = flags;
191 queue->ring_nr = ring_nr;
192
193 queue->entity = get_sched_entity(ctx, priv->gpu->rb[ring_nr],
194 ring_nr, sched_prio);
195 if (IS_ERR(queue->entity)) {
196 ret = PTR_ERR(queue->entity);
197 kfree(queue);
198 return ret;
199 }
200
201 write_lock(&ctx->queuelock);
202
203 queue->ctx = msm_file_private_get(ctx);
204 queue->id = ctx->queueid++;
205
206 if (id)
207 *id = queue->id;
208
209 idr_init(&queue->fence_idr);
210 spin_lock_init(&queue->idr_lock);
211 mutex_init(&queue->lock);
212
213 list_add_tail(&queue->node, &ctx->submitqueues);
214
215 write_unlock(&ctx->queuelock);
216
217 return 0;
218}
219
220/*
221 * Create the default submit-queue (id==0), used for backwards compatibility
222 * for userspace that pre-dates the introduction of submitqueues.
223 */
224int msm_submitqueue_init(struct drm_device *drm, struct msm_file_private *ctx)
225{
226 struct msm_drm_private *priv = drm->dev_private;
227 int default_prio, max_priority;
228
229 if (!priv->gpu)
230 return -ENODEV;
231
232 max_priority = (priv->gpu->nr_rings * NR_SCHED_PRIORITIES) - 1;
233
234 /*
235 * Pick a medium priority level as default. Lower numeric value is
236 * higher priority, so round-up to pick a priority that is not higher
237 * than the middle priority level.
238 */
239 default_prio = DIV_ROUND_UP(max_priority, 2);
240
241 return msm_submitqueue_create(drm, ctx, default_prio, 0, NULL);
242}
243
244static int msm_submitqueue_query_faults(struct msm_gpu_submitqueue *queue,
245 struct drm_msm_submitqueue_query *args)
246{
247 size_t size = min_t(size_t, args->len, sizeof(queue->faults));
248 int ret;
249
250 /* If a zero length was passed in, return the data size we expect */
251 if (!args->len) {
252 args->len = sizeof(queue->faults);
253 return 0;
254 }
255
256 /* Set the length to the actual size of the data */
257 args->len = size;
258
259 ret = copy_to_user(u64_to_user_ptr(args->data), &queue->faults, size);
260
261 return ret ? -EFAULT : 0;
262}
263
264int msm_submitqueue_query(struct drm_device *drm, struct msm_file_private *ctx,
265 struct drm_msm_submitqueue_query *args)
266{
267 struct msm_gpu_submitqueue *queue;
268 int ret = -EINVAL;
269
270 if (args->pad)
271 return -EINVAL;
272
273 queue = msm_submitqueue_get(ctx, args->id);
274 if (!queue)
275 return -ENOENT;
276
277 if (args->param == MSM_SUBMITQUEUE_PARAM_FAULTS)
278 ret = msm_submitqueue_query_faults(queue, args);
279
280 msm_submitqueue_put(queue);
281
282 return ret;
283}
284
285int msm_submitqueue_remove(struct msm_file_private *ctx, u32 id)
286{
287 struct msm_gpu_submitqueue *entry;
288
289 if (!ctx)
290 return 0;
291
292 /*
293 * id 0 is the "default" queue and can't be destroyed
294 * by the user
295 */
296 if (!id)
297 return -ENOENT;
298
299 write_lock(&ctx->queuelock);
300
301 list_for_each_entry(entry, &ctx->submitqueues, node) {
302 if (entry->id == id) {
303 list_del(&entry->node);
304 write_unlock(&ctx->queuelock);
305
306 msm_submitqueue_put(entry);
307 return 0;
308 }
309 }
310
311 write_unlock(&ctx->queuelock);
312 return -ENOENT;
313}
314
1/* Copyright (c) 2017 The Linux Foundation. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 */
13
14#include <linux/kref.h>
15#include "msm_gpu.h"
16
17void msm_submitqueue_destroy(struct kref *kref)
18{
19 struct msm_gpu_submitqueue *queue = container_of(kref,
20 struct msm_gpu_submitqueue, ref);
21
22 kfree(queue);
23}
24
25struct msm_gpu_submitqueue *msm_submitqueue_get(struct msm_file_private *ctx,
26 u32 id)
27{
28 struct msm_gpu_submitqueue *entry;
29
30 if (!ctx)
31 return NULL;
32
33 read_lock(&ctx->queuelock);
34
35 list_for_each_entry(entry, &ctx->submitqueues, node) {
36 if (entry->id == id) {
37 kref_get(&entry->ref);
38 read_unlock(&ctx->queuelock);
39
40 return entry;
41 }
42 }
43
44 read_unlock(&ctx->queuelock);
45 return NULL;
46}
47
48void msm_submitqueue_close(struct msm_file_private *ctx)
49{
50 struct msm_gpu_submitqueue *entry, *tmp;
51
52 if (!ctx)
53 return;
54
55 /*
56 * No lock needed in close and there won't
57 * be any more user ioctls coming our way
58 */
59 list_for_each_entry_safe(entry, tmp, &ctx->submitqueues, node)
60 msm_submitqueue_put(entry);
61}
62
63int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
64 u32 prio, u32 flags, u32 *id)
65{
66 struct msm_drm_private *priv = drm->dev_private;
67 struct msm_gpu_submitqueue *queue;
68
69 if (!ctx)
70 return -ENODEV;
71
72 queue = kzalloc(sizeof(*queue), GFP_KERNEL);
73
74 if (!queue)
75 return -ENOMEM;
76
77 kref_init(&queue->ref);
78 queue->flags = flags;
79
80 if (priv->gpu) {
81 if (prio >= priv->gpu->nr_rings)
82 return -EINVAL;
83
84 queue->prio = prio;
85 }
86
87 write_lock(&ctx->queuelock);
88
89 queue->id = ctx->queueid++;
90
91 if (id)
92 *id = queue->id;
93
94 list_add_tail(&queue->node, &ctx->submitqueues);
95
96 write_unlock(&ctx->queuelock);
97
98 return 0;
99}
100
101int msm_submitqueue_init(struct drm_device *drm, struct msm_file_private *ctx)
102{
103 struct msm_drm_private *priv = drm->dev_private;
104 int default_prio;
105
106 if (!ctx)
107 return 0;
108
109 /*
110 * Select priority 2 as the "default priority" unless nr_rings is less
111 * than 2 and then pick the lowest pirority
112 */
113 default_prio = priv->gpu ?
114 clamp_t(uint32_t, 2, 0, priv->gpu->nr_rings - 1) : 0;
115
116 INIT_LIST_HEAD(&ctx->submitqueues);
117
118 rwlock_init(&ctx->queuelock);
119
120 return msm_submitqueue_create(drm, ctx, default_prio, 0, NULL);
121}
122
123int msm_submitqueue_remove(struct msm_file_private *ctx, u32 id)
124{
125 struct msm_gpu_submitqueue *entry;
126
127 if (!ctx)
128 return 0;
129
130 /*
131 * id 0 is the "default" queue and can't be destroyed
132 * by the user
133 */
134 if (!id)
135 return -ENOENT;
136
137 write_lock(&ctx->queuelock);
138
139 list_for_each_entry(entry, &ctx->submitqueues, node) {
140 if (entry->id == id) {
141 list_del(&entry->node);
142 write_unlock(&ctx->queuelock);
143
144 msm_submitqueue_put(entry);
145 return 0;
146 }
147 }
148
149 write_unlock(&ctx->queuelock);
150 return -ENOENT;
151}
152