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>
40 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
43 virtio_gpu_device *virtio_gpu_get_vgdev(struct ttm_bo_device *bdev)
45 struct virtio_gpu_mman *mman;
46 struct virtio_gpu_device *vgdev;
48 mman = container_of(bdev, struct virtio_gpu_mman, bdev);
49 vgdev = container_of(mman, struct virtio_gpu_device, mman);
53 int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma)
55 struct drm_file *file_priv;
56 struct virtio_gpu_device *vgdev;
59 file_priv = filp->private_data;
60 vgdev = file_priv->minor->dev->dev_private;
63 "filp->private_data->minor->dev->dev_private == NULL\n");
66 r = ttm_bo_mmap(filp, vma, &vgdev->mman.bdev);
71 static int virtio_gpu_invalidate_caches(struct ttm_bo_device *bdev,
77 static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
78 struct ttm_buffer_object *bo,
79 const struct ttm_place *place,
80 struct ttm_mem_reg *mem)
82 mem->mm_node = (void *)1;
86 static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
87 struct ttm_mem_reg *mem)
89 mem->mm_node = (void *)NULL;
92 static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
98 static int ttm_bo_man_takedown(struct ttm_mem_type_manager *man)
103 static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
104 struct drm_printer *printer)
108 static const struct ttm_mem_type_manager_func virtio_gpu_bo_manager_func = {
109 .init = ttm_bo_man_init,
110 .takedown = ttm_bo_man_takedown,
111 .get_node = ttm_bo_man_get_node,
112 .put_node = ttm_bo_man_put_node,
113 .debug = ttm_bo_man_debug
116 static int virtio_gpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
117 struct ttm_mem_type_manager *man)
119 struct virtio_gpu_device *vgdev;
121 vgdev = virtio_gpu_get_vgdev(bdev);
126 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
127 man->available_caching = TTM_PL_MASK_CACHING;
128 man->default_caching = TTM_PL_FLAG_CACHED;
131 man->func = &virtio_gpu_bo_manager_func;
132 man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
133 man->available_caching = TTM_PL_MASK_CACHING;
134 man->default_caching = TTM_PL_FLAG_CACHED;
137 DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
143 static void virtio_gpu_evict_flags(struct ttm_buffer_object *bo,
144 struct ttm_placement *placement)
146 static const struct ttm_place placements = {
149 .flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM,
152 placement->placement = &placements;
153 placement->busy_placement = &placements;
154 placement->num_placement = 1;
155 placement->num_busy_placement = 1;
158 static int virtio_gpu_verify_access(struct ttm_buffer_object *bo,
164 static int virtio_gpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
165 struct ttm_mem_reg *mem)
167 struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
169 mem->bus.addr = NULL;
171 mem->bus.size = mem->num_pages << PAGE_SHIFT;
173 mem->bus.is_iomem = false;
174 if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
176 switch (mem->mem_type) {
187 static void virtio_gpu_ttm_io_mem_free(struct ttm_bo_device *bdev,
188 struct ttm_mem_reg *mem)
193 * TTM backend functions.
195 struct virtio_gpu_ttm_tt {
196 struct ttm_dma_tt ttm;
197 struct virtio_gpu_device *vgdev;
201 static int virtio_gpu_ttm_backend_bind(struct ttm_tt *ttm,
202 struct ttm_mem_reg *bo_mem)
204 struct virtio_gpu_ttm_tt *gtt = (void *)ttm;
206 gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
208 WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
209 ttm->num_pages, bo_mem, ttm);
211 /* Not implemented */
215 static int virtio_gpu_ttm_backend_unbind(struct ttm_tt *ttm)
217 /* Not implemented */
221 static void virtio_gpu_ttm_backend_destroy(struct ttm_tt *ttm)
223 struct virtio_gpu_ttm_tt *gtt = (void *)ttm;
225 ttm_dma_tt_fini(>t->ttm);
229 static struct ttm_backend_func virtio_gpu_backend_func = {
230 .bind = &virtio_gpu_ttm_backend_bind,
231 .unbind = &virtio_gpu_ttm_backend_unbind,
232 .destroy = &virtio_gpu_ttm_backend_destroy,
235 static struct ttm_tt *virtio_gpu_ttm_tt_create(struct ttm_buffer_object *bo,
238 struct virtio_gpu_device *vgdev;
239 struct virtio_gpu_ttm_tt *gtt;
241 vgdev = virtio_gpu_get_vgdev(bo->bdev);
242 gtt = kzalloc(sizeof(struct virtio_gpu_ttm_tt), GFP_KERNEL);
245 gtt->ttm.ttm.func = &virtio_gpu_backend_func;
247 if (ttm_dma_tt_init(>t->ttm, bo, page_flags)) {
251 return >t->ttm.ttm;
254 static void virtio_gpu_move_null(struct ttm_buffer_object *bo,
255 struct ttm_mem_reg *new_mem)
257 struct ttm_mem_reg *old_mem = &bo->mem;
259 BUG_ON(old_mem->mm_node != NULL);
261 new_mem->mm_node = NULL;
264 static int virtio_gpu_bo_move(struct ttm_buffer_object *bo, bool evict,
265 struct ttm_operation_ctx *ctx,
266 struct ttm_mem_reg *new_mem)
270 ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
274 virtio_gpu_move_null(bo, new_mem);
278 static void virtio_gpu_bo_move_notify(struct ttm_buffer_object *tbo,
280 struct ttm_mem_reg *new_mem)
282 struct virtio_gpu_object *bo;
283 struct virtio_gpu_device *vgdev;
285 bo = container_of(tbo, struct virtio_gpu_object, tbo);
286 vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
288 if (!new_mem || (new_mem->placement & TTM_PL_FLAG_SYSTEM)) {
289 if (bo->hw_res_handle)
290 virtio_gpu_object_detach(vgdev, bo);
292 } else if (new_mem->placement & TTM_PL_FLAG_TT) {
293 if (bo->hw_res_handle) {
294 virtio_gpu_object_attach(vgdev, bo, NULL);
299 static void virtio_gpu_bo_swap_notify(struct ttm_buffer_object *tbo)
301 struct virtio_gpu_object *bo;
302 struct virtio_gpu_device *vgdev;
304 bo = container_of(tbo, struct virtio_gpu_object, tbo);
305 vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
308 virtio_gpu_object_free_sg_table(bo);
311 static struct ttm_bo_driver virtio_gpu_bo_driver = {
312 .ttm_tt_create = &virtio_gpu_ttm_tt_create,
313 .invalidate_caches = &virtio_gpu_invalidate_caches,
314 .init_mem_type = &virtio_gpu_init_mem_type,
315 .eviction_valuable = ttm_bo_eviction_valuable,
316 .evict_flags = &virtio_gpu_evict_flags,
317 .move = &virtio_gpu_bo_move,
318 .verify_access = &virtio_gpu_verify_access,
319 .io_mem_reserve = &virtio_gpu_ttm_io_mem_reserve,
320 .io_mem_free = &virtio_gpu_ttm_io_mem_free,
321 .move_notify = &virtio_gpu_bo_move_notify,
322 .swap_notify = &virtio_gpu_bo_swap_notify,
325 int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev)
329 /* No others user of address space so set it to 0 */
330 r = ttm_bo_device_init(&vgdev->mman.bdev,
331 &virtio_gpu_bo_driver,
332 vgdev->ddev->anon_inode->i_mapping,
333 DRM_FILE_PAGE_OFFSET, 0);
335 DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
339 r = ttm_bo_init_mm(&vgdev->mman.bdev, TTM_PL_TT, 0);
341 DRM_ERROR("Failed initializing GTT heap.\n");
347 ttm_bo_device_release(&vgdev->mman.bdev);
352 void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev)
354 ttm_bo_device_release(&vgdev->mman.bdev);
355 DRM_INFO("virtio_gpu: ttm finalized\n");