1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2017 The Linux Foundation. All rights reserved.
5 #include <linux/kref.h>
6 #include <linux/uaccess.h>
10 void msm_submitqueue_destroy(struct kref *kref)
12 struct msm_gpu_submitqueue *queue = container_of(kref,
13 struct msm_gpu_submitqueue, ref);
15 msm_file_private_put(queue->ctx);
20 struct msm_gpu_submitqueue *msm_submitqueue_get(struct msm_file_private *ctx,
23 struct msm_gpu_submitqueue *entry;
28 read_lock(&ctx->queuelock);
30 list_for_each_entry(entry, &ctx->submitqueues, node) {
31 if (entry->id == id) {
32 kref_get(&entry->ref);
33 read_unlock(&ctx->queuelock);
39 read_unlock(&ctx->queuelock);
43 void msm_submitqueue_close(struct msm_file_private *ctx)
45 struct msm_gpu_submitqueue *entry, *tmp;
51 * No lock needed in close and there won't
52 * be any more user ioctls coming our way
54 list_for_each_entry_safe(entry, tmp, &ctx->submitqueues, node) {
55 list_del(&entry->node);
56 msm_submitqueue_put(entry);
60 int msm_submitqueue_create(struct drm_device *drm, struct msm_file_private *ctx,
61 u32 prio, u32 flags, u32 *id)
63 struct msm_drm_private *priv = drm->dev_private;
64 struct msm_gpu_submitqueue *queue;
69 queue = kzalloc(sizeof(*queue), GFP_KERNEL);
74 kref_init(&queue->ref);
78 if (prio >= priv->gpu->nr_rings) {
86 write_lock(&ctx->queuelock);
88 queue->ctx = msm_file_private_get(ctx);
89 queue->id = ctx->queueid++;
94 list_add_tail(&queue->node, &ctx->submitqueues);
96 write_unlock(&ctx->queuelock);
101 int msm_submitqueue_init(struct drm_device *drm, struct msm_file_private *ctx)
103 struct msm_drm_private *priv = drm->dev_private;
110 * Select priority 2 as the "default priority" unless nr_rings is less
111 * than 2 and then pick the lowest pirority
113 default_prio = priv->gpu ?
114 clamp_t(uint32_t, 2, 0, priv->gpu->nr_rings - 1) : 0;
116 INIT_LIST_HEAD(&ctx->submitqueues);
118 rwlock_init(&ctx->queuelock);
120 return msm_submitqueue_create(drm, ctx, default_prio, 0, NULL);
123 static int msm_submitqueue_query_faults(struct msm_gpu_submitqueue *queue,
124 struct drm_msm_submitqueue_query *args)
126 size_t size = min_t(size_t, args->len, sizeof(queue->faults));
129 /* If a zero length was passed in, return the data size we expect */
131 args->len = sizeof(queue->faults);
135 /* Set the length to the actual size of the data */
138 ret = copy_to_user(u64_to_user_ptr(args->data), &queue->faults, size);
140 return ret ? -EFAULT : 0;
143 int msm_submitqueue_query(struct drm_device *drm, struct msm_file_private *ctx,
144 struct drm_msm_submitqueue_query *args)
146 struct msm_gpu_submitqueue *queue;
152 queue = msm_submitqueue_get(ctx, args->id);
156 if (args->param == MSM_SUBMITQUEUE_PARAM_FAULTS)
157 ret = msm_submitqueue_query_faults(queue, args);
159 msm_submitqueue_put(queue);
164 int msm_submitqueue_remove(struct msm_file_private *ctx, u32 id)
166 struct msm_gpu_submitqueue *entry;
172 * id 0 is the "default" queue and can't be destroyed
178 write_lock(&ctx->queuelock);
180 list_for_each_entry(entry, &ctx->submitqueues, node) {
181 if (entry->id == id) {
182 list_del(&entry->node);
183 write_unlock(&ctx->queuelock);
185 msm_submitqueue_put(entry);
190 write_unlock(&ctx->queuelock);