WIP FPC-III support
[linux/fpc-iii.git] / drivers / gpu / drm / virtio / virtgpu_object.c
blobd69a5b6da55320c7e10ab88d6baa49f50c4c6e7d
1 /*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 #include <linux/dma-mapping.h>
27 #include <linux/moduleparam.h>
29 #include "virtgpu_drv.h"
31 static int virtio_gpu_virglrenderer_workaround = 1;
32 module_param_named(virglhack, virtio_gpu_virglrenderer_workaround, int, 0400);
34 int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, uint32_t *resid)
36 if (virtio_gpu_virglrenderer_workaround) {
38 * Hack to avoid re-using resource IDs.
40 * virglrenderer versions up to (and including) 0.7.0
41 * can't deal with that. virglrenderer commit
42 * "f91a9dd35715 Fix unlinking resources from hash
43 * table." (Feb 2019) fixes the bug.
45 static atomic_t seqno = ATOMIC_INIT(0);
46 int handle = atomic_inc_return(&seqno);
47 *resid = handle + 1;
48 } else {
49 int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL);
50 if (handle < 0)
51 return handle;
52 *resid = handle + 1;
54 return 0;
57 static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
59 if (!virtio_gpu_virglrenderer_workaround) {
60 ida_free(&vgdev->resource_ida, id - 1);
64 void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo)
66 struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
68 virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
69 if (virtio_gpu_is_shmem(bo)) {
70 struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo);
72 if (shmem->pages) {
73 if (shmem->mapped) {
74 dma_unmap_sgtable(vgdev->vdev->dev.parent,
75 shmem->pages, DMA_TO_DEVICE, 0);
76 shmem->mapped = 0;
79 sg_free_table(shmem->pages);
80 kfree(shmem->pages);
81 shmem->pages = NULL;
82 drm_gem_shmem_unpin(&bo->base.base);
85 drm_gem_shmem_free_object(&bo->base.base);
86 } else if (virtio_gpu_is_vram(bo)) {
87 struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo);
89 spin_lock(&vgdev->host_visible_lock);
90 if (drm_mm_node_allocated(&vram->vram_node))
91 drm_mm_remove_node(&vram->vram_node);
93 spin_unlock(&vgdev->host_visible_lock);
95 drm_gem_free_mmap_offset(&vram->base.base.base);
96 drm_gem_object_release(&vram->base.base.base);
97 kfree(vram);
101 static void virtio_gpu_free_object(struct drm_gem_object *obj)
103 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
104 struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
106 if (bo->created) {
107 virtio_gpu_cmd_unref_resource(vgdev, bo);
108 virtio_gpu_notify(vgdev);
109 /* completion handler calls virtio_gpu_cleanup_object() */
110 return;
112 virtio_gpu_cleanup_object(bo);
115 static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = {
116 .free = virtio_gpu_free_object,
117 .open = virtio_gpu_gem_object_open,
118 .close = virtio_gpu_gem_object_close,
120 .print_info = drm_gem_shmem_print_info,
121 .export = virtgpu_gem_prime_export,
122 .pin = drm_gem_shmem_pin,
123 .unpin = drm_gem_shmem_unpin,
124 .get_sg_table = drm_gem_shmem_get_sg_table,
125 .vmap = drm_gem_shmem_vmap,
126 .vunmap = drm_gem_shmem_vunmap,
127 .mmap = drm_gem_shmem_mmap,
130 bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo)
132 return bo->base.base.funcs == &virtio_gpu_shmem_funcs;
135 struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,
136 size_t size)
138 struct virtio_gpu_object_shmem *shmem;
139 struct drm_gem_shmem_object *dshmem;
141 shmem = kzalloc(sizeof(*shmem), GFP_KERNEL);
142 if (!shmem)
143 return NULL;
145 dshmem = &shmem->base.base;
146 dshmem->base.funcs = &virtio_gpu_shmem_funcs;
147 return &dshmem->base;
150 static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev,
151 struct virtio_gpu_object *bo,
152 struct virtio_gpu_mem_entry **ents,
153 unsigned int *nents)
155 bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);
156 struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo);
157 struct scatterlist *sg;
158 int si, ret;
160 ret = drm_gem_shmem_pin(&bo->base.base);
161 if (ret < 0)
162 return -EINVAL;
165 * virtio_gpu uses drm_gem_shmem_get_sg_table instead of
166 * drm_gem_shmem_get_pages_sgt because virtio has it's own set of
167 * dma-ops. This is discouraged for other drivers, but should be fine
168 * since virtio_gpu doesn't support dma-buf import from other devices.
170 shmem->pages = drm_gem_shmem_get_sg_table(&bo->base.base);
171 if (!shmem->pages) {
172 drm_gem_shmem_unpin(&bo->base.base);
173 return -EINVAL;
176 if (use_dma_api) {
177 ret = dma_map_sgtable(vgdev->vdev->dev.parent,
178 shmem->pages, DMA_TO_DEVICE, 0);
179 if (ret)
180 return ret;
181 *nents = shmem->mapped = shmem->pages->nents;
182 } else {
183 *nents = shmem->pages->orig_nents;
186 *ents = kvmalloc_array(*nents,
187 sizeof(struct virtio_gpu_mem_entry),
188 GFP_KERNEL);
189 if (!(*ents)) {
190 DRM_ERROR("failed to allocate ent list\n");
191 return -ENOMEM;
194 if (use_dma_api) {
195 for_each_sgtable_dma_sg(shmem->pages, sg, si) {
196 (*ents)[si].addr = cpu_to_le64(sg_dma_address(sg));
197 (*ents)[si].length = cpu_to_le32(sg_dma_len(sg));
198 (*ents)[si].padding = 0;
200 } else {
201 for_each_sgtable_sg(shmem->pages, sg, si) {
202 (*ents)[si].addr = cpu_to_le64(sg_phys(sg));
203 (*ents)[si].length = cpu_to_le32(sg->length);
204 (*ents)[si].padding = 0;
208 return 0;
211 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
212 struct virtio_gpu_object_params *params,
213 struct virtio_gpu_object **bo_ptr,
214 struct virtio_gpu_fence *fence)
216 struct virtio_gpu_object_array *objs = NULL;
217 struct drm_gem_shmem_object *shmem_obj;
218 struct virtio_gpu_object *bo;
219 struct virtio_gpu_mem_entry *ents;
220 unsigned int nents;
221 int ret;
223 *bo_ptr = NULL;
225 params->size = roundup(params->size, PAGE_SIZE);
226 shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size);
227 if (IS_ERR(shmem_obj))
228 return PTR_ERR(shmem_obj);
229 bo = gem_to_virtio_gpu_obj(&shmem_obj->base);
231 ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);
232 if (ret < 0)
233 goto err_free_gem;
235 bo->dumb = params->dumb;
237 if (fence) {
238 ret = -ENOMEM;
239 objs = virtio_gpu_array_alloc(1);
240 if (!objs)
241 goto err_put_id;
242 virtio_gpu_array_add_obj(objs, &bo->base.base);
244 ret = virtio_gpu_array_lock_resv(objs);
245 if (ret != 0)
246 goto err_put_objs;
249 ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents);
250 if (ret != 0) {
251 virtio_gpu_free_object(&shmem_obj->base);
252 return ret;
255 if (params->blob) {
256 virtio_gpu_cmd_resource_create_blob(vgdev, bo, params,
257 ents, nents);
258 } else if (params->virgl) {
259 virtio_gpu_cmd_resource_create_3d(vgdev, bo, params,
260 objs, fence);
261 virtio_gpu_object_attach(vgdev, bo, ents, nents);
262 } else {
263 virtio_gpu_cmd_create_resource(vgdev, bo, params,
264 objs, fence);
265 virtio_gpu_object_attach(vgdev, bo, ents, nents);
268 *bo_ptr = bo;
269 return 0;
271 err_put_objs:
272 virtio_gpu_array_put_free(objs);
273 err_put_id:
274 virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
275 err_free_gem:
276 drm_gem_shmem_free_object(&shmem_obj->base);
277 return ret;