2 * Copyright (C) 2015 Red Hat, Inc.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
28 #include <drm/ttm/ttm_bo_api.h>
29 #include <drm/ttm/ttm_bo_driver.h>
30 #include <drm/ttm/ttm_placement.h>
31 #include <drm/ttm/ttm_page_alloc.h>
32 #include <drm/ttm/ttm_module.h>
35 #include <drm/virtgpu_drm.h>
36 #include "virtgpu_drv.h"
38 #include <linux/delay.h>
41 virtio_gpu_device *virtio_gpu_get_vgdev(struct ttm_bo_device *bdev)
43 struct virtio_gpu_mman *mman;
44 struct virtio_gpu_device *vgdev;
46 mman = container_of(bdev, struct virtio_gpu_mman, bdev);
47 vgdev = container_of(mman, struct virtio_gpu_device, mman);
51 int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma)
53 struct drm_file *file_priv;
54 struct virtio_gpu_device *vgdev;
57 file_priv = filp->private_data;
58 vgdev = file_priv->minor->dev->dev_private;
61 "filp->private_data->minor->dev->dev_private == NULL\n");
64 r = ttm_bo_mmap(filp, vma, &vgdev->mman.bdev);
69 static int virtio_gpu_invalidate_caches(struct ttm_bo_device *bdev,
75 static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
76 struct ttm_buffer_object *bo,
77 const struct ttm_place *place,
78 struct ttm_mem_reg *mem)
80 mem->mm_node = (void *)1;
84 static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
85 struct ttm_mem_reg *mem)
87 mem->mm_node = (void *)NULL;
90 static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
96 static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man)
101 static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
102 struct drm_printer *printer)
106 static const struct ttm_mem_type_manager_func virtio_gpu_bo_manager_func = {
107 .init = ttm_bo_man_init,
108 .takedown = ttm_bo_man_takedown,
109 .get_node = ttm_bo_man_get_node,
110 .put_node = ttm_bo_man_put_node,
111 .debug = ttm_bo_man_debug
114 static int virtio_gpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
115 struct ttm_mem_type_manager *man)
120 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
121 man->available_caching = TTM_PL_MASK_CACHING;
122 man->default_caching = TTM_PL_FLAG_CACHED;
125 man->func = &virtio_gpu_bo_manager_func;
126 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
127 man->available_caching = TTM_PL_MASK_CACHING;
128 man->default_caching = TTM_PL_FLAG_CACHED;
131 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
137 static void virtio_gpu_evict_flags(struct ttm_buffer_object *bo,
138 struct ttm_placement *placement)
140 static const struct ttm_place placements = {
143 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM,
146 placement->placement = &placements;
147 placement->busy_placement = &placements;
148 placement->num_placement = 1;
149 placement->num_busy_placement = 1;
152 static int virtio_gpu_verify_access(struct ttm_buffer_object *bo,
158 static int virtio_gpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
159 struct ttm_mem_reg *mem)
161 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
163 mem->bus.addr = NULL;
165 mem->bus.size = mem->num_pages << PAGE_SHIFT;
167 mem->bus.is_iomem = false;
168 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
170 switch (mem->mem_type) {
181 static void virtio_gpu_ttm_io_mem_free(struct ttm_bo_device *bdev,
182 struct ttm_mem_reg *mem)
187 * TTM backend functions.
189 struct virtio_gpu_ttm_tt {
190 struct ttm_dma_tt ttm;
191 struct virtio_gpu_object *obj;
194 static int virtio_gpu_ttm_tt_bind(struct ttm_tt *ttm,
195 struct ttm_mem_reg *bo_mem)
197 struct virtio_gpu_ttm_tt *gtt =
198 container_of(ttm, struct virtio_gpu_ttm_tt, ttm.ttm);
199 struct virtio_gpu_device *vgdev =
200 virtio_gpu_get_vgdev(gtt->obj->tbo.bdev);
202 virtio_gpu_object_attach(vgdev, gtt->obj, NULL);
206 static int virtio_gpu_ttm_tt_unbind(struct ttm_tt *ttm)
208 struct virtio_gpu_ttm_tt *gtt =
209 container_of(ttm, struct virtio_gpu_ttm_tt, ttm.ttm);
210 struct virtio_gpu_device *vgdev =
211 virtio_gpu_get_vgdev(gtt->obj->tbo.bdev);
213 virtio_gpu_object_detach(vgdev, gtt->obj);
217 static void virtio_gpu_ttm_tt_destroy(struct ttm_tt *ttm)
219 struct virtio_gpu_ttm_tt *gtt =
220 container_of(ttm, struct virtio_gpu_ttm_tt, ttm.ttm);
222 ttm_dma_tt_fini(>t->ttm);
226 static struct ttm_backend_func virtio_gpu_tt_func = {
227 .bind = &virtio_gpu_ttm_tt_bind,
228 .unbind = &virtio_gpu_ttm_tt_unbind,
229 .destroy = &virtio_gpu_ttm_tt_destroy,
232 static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_buffer_object *bo,
235 struct virtio_gpu_device *vgdev;
236 struct virtio_gpu_ttm_tt *gtt;
238 vgdev = virtio_gpu_get_vgdev(bo->bdev);
239 gtt = kzalloc(sizeof(struct virtio_gpu_ttm_tt), GFP_KERNEL);
242 gtt->ttm.ttm.func = &virtio_gpu_tt_func;
243 gtt->obj = container_of(bo, struct virtio_gpu_object, tbo);
244 if (ttm_dma_tt_init(>t->ttm, bo, page_flags)) {
248 return >t->ttm.ttm;
251 static void virtio_gpu_bo_swap_notify(struct ttm_buffer_object *tbo)
253 struct virtio_gpu_object *bo;
255 bo = container_of(tbo, struct virtio_gpu_object, tbo);
258 virtio_gpu_object_free_sg_table(bo);
261 static struct ttm_bo_driver virtio_gpu_bo_driver = {
262 .ttm_tt_create = &virtio_gpu_ttm_tt_create,
263 .invalidate_caches = &virtio_gpu_invalidate_caches,
264 .init_mem_type = &virtio_gpu_init_mem_type,
265 .eviction_valuable = ttm_bo_eviction_valuable,
266 .evict_flags = &virtio_gpu_evict_flags,
267 .verify_access = &virtio_gpu_verify_access,
268 .io_mem_reserve = &virtio_gpu_ttm_io_mem_reserve,
269 .io_mem_free = &virtio_gpu_ttm_io_mem_free,
270 .swap_notify = &virtio_gpu_bo_swap_notify,
273 int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev)
277 /* No others user of address space so set it to 0 */
278 r = ttm_bo_device_init(&vgdev->mman.bdev,
279 &virtio_gpu_bo_driver,
280 vgdev->ddev->anon_inode->i_mapping,
283 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
287 r = ttm_bo_init_mm(&vgdev->mman.bdev, TTM_PL_TT, 0);
289 DRM_ERROR("Failed initializing GTT heap.\n");
295 ttm_bo_device_release(&vgdev->mman.bdev);
300 void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev)
302 ttm_bo_device_release(&vgdev->mman.bdev);
303 DRM_INFO("virtio_gpu: ttm finalized\n");