2 * Copyright (C) 2015 Red Hat, Inc.
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6 * a copy of this software and associated documentation files (the
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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.
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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 "virtgpu_drv.h"
28 static int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
31 int handle = ida_alloc(&vgdev->resource_ida, GFP_KERNEL);
40 static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
42 ida_free(&vgdev->resource_ida, id - 1);
45 static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
47 struct virtio_gpu_object *bo;
48 struct virtio_gpu_device *vgdev;
50 bo = container_of(tbo, struct virtio_gpu_object, tbo);
51 vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
54 virtio_gpu_cmd_unref_resource(vgdev, bo->hw_res_handle);
56 virtio_gpu_object_free_sg_table(bo);
58 virtio_gpu_object_kunmap(bo);
59 drm_gem_object_release(&bo->gem_base);
60 virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
64 static void virtio_gpu_init_ttm_placement(struct virtio_gpu_object *vgbo,
68 u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
70 vgbo->placement.placement = &vgbo->placement_code;
71 vgbo->placement.busy_placement = &vgbo->placement_code;
72 vgbo->placement_code.fpfn = 0;
73 vgbo->placement_code.lpfn = 0;
74 vgbo->placement_code.flags =
75 TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT | pflag;
76 vgbo->placement.num_placement = c;
77 vgbo->placement.num_busy_placement = c;
81 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
82 unsigned long size, bool kernel, bool pinned,
83 struct virtio_gpu_object **bo_ptr)
85 struct virtio_gpu_object *bo;
86 enum ttm_bo_type type;
91 type = ttm_bo_type_kernel;
93 type = ttm_bo_type_device;
96 acc_size = ttm_bo_dma_acc_size(&vgdev->mman.bdev, size,
97 sizeof(struct virtio_gpu_object));
99 bo = kzalloc(sizeof(struct virtio_gpu_object), GFP_KERNEL);
102 ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);
107 size = roundup(size, PAGE_SIZE);
108 ret = drm_gem_object_init(vgdev->ddev, &bo->gem_base, size);
110 virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
115 virtio_gpu_init_ttm_placement(bo, pinned);
117 ret = ttm_bo_init(&vgdev->mman.bdev, &bo->tbo, size, type,
118 &bo->placement, 0, !kernel, acc_size,
119 NULL, NULL, &virtio_gpu_ttm_bo_destroy);
120 /* ttm_bo_init failure will call the destroy */
128 void virtio_gpu_object_kunmap(struct virtio_gpu_object *bo)
131 ttm_bo_kunmap(&bo->kmap);
134 int virtio_gpu_object_kmap(struct virtio_gpu_object *bo)
141 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
144 bo->vmap = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
148 int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
149 struct virtio_gpu_object *bo)
152 struct page **pages = bo->tbo.ttm->pages;
153 int nr_pages = bo->tbo.num_pages;
154 struct ttm_operation_ctx ctx = {
155 .interruptible = false,
163 if (bo->tbo.ttm->state == tt_unpopulated)
164 bo->tbo.ttm->bdev->driver->ttm_tt_populate(bo->tbo.ttm, &ctx);
165 bo->pages = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
169 ret = sg_alloc_table_from_pages(bo->pages, pages, nr_pages, 0,
170 nr_pages << PAGE_SHIFT, GFP_KERNEL);
180 void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo)
182 sg_free_table(bo->pages);
187 int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait)
191 r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
192 if (unlikely(r != 0))
194 r = ttm_bo_wait(&bo->tbo, true, no_wait);
195 ttm_bo_unreserve(&bo->tbo);