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1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
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:
12 *
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.
16 *
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.
24 */
25
26#include "virtgpu_drv.h"
27
28static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
29{
30 struct virtio_gpu_object *bo;
31 struct virtio_gpu_device *vgdev;
32
33 bo = container_of(tbo, struct virtio_gpu_object, tbo);
34 vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
35
36 if (bo->hw_res_handle)
37 virtio_gpu_cmd_unref_resource(vgdev, bo->hw_res_handle);
38 if (bo->pages)
39 virtio_gpu_object_free_sg_table(bo);
40 drm_gem_object_release(&bo->gem_base);
41 kfree(bo);
42}
43
44static void virtio_gpu_init_ttm_placement(struct virtio_gpu_object *vgbo,
45 bool pinned)
46{
47 u32 c = 1;
48 u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
49
50 vgbo->placement.placement = &vgbo->placement_code;
51 vgbo->placement.busy_placement = &vgbo->placement_code;
52 vgbo->placement_code.fpfn = 0;
53 vgbo->placement_code.lpfn = 0;
54 vgbo->placement_code.flags =
55 TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT | pflag;
56 vgbo->placement.num_placement = c;
57 vgbo->placement.num_busy_placement = c;
58
59}
60
61int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
62 unsigned long size, bool kernel, bool pinned,
63 struct virtio_gpu_object **bo_ptr)
64{
65 struct virtio_gpu_object *bo;
66 enum ttm_bo_type type;
67 size_t acc_size;
68 int ret;
69
70 if (kernel)
71 type = ttm_bo_type_kernel;
72 else
73 type = ttm_bo_type_device;
74 *bo_ptr = NULL;
75
76 acc_size = ttm_bo_dma_acc_size(&vgdev->mman.bdev, size,
77 sizeof(struct virtio_gpu_object));
78
79 bo = kzalloc(sizeof(struct virtio_gpu_object), GFP_KERNEL);
80 if (bo == NULL)
81 return -ENOMEM;
82 size = roundup(size, PAGE_SIZE);
83 ret = drm_gem_object_init(vgdev->ddev, &bo->gem_base, size);
84 if (ret != 0)
85 return ret;
86 bo->dumb = false;
87 virtio_gpu_init_ttm_placement(bo, pinned);
88
89 ret = ttm_bo_init(&vgdev->mman.bdev, &bo->tbo, size, type,
90 &bo->placement, 0, !kernel, NULL, acc_size,
91 NULL, NULL, &virtio_gpu_ttm_bo_destroy);
92 /* ttm_bo_init failure will call the destroy */
93 if (ret != 0)
94 return ret;
95
96 *bo_ptr = bo;
97 return 0;
98}
99
100int virtio_gpu_object_kmap(struct virtio_gpu_object *bo, void **ptr)
101{
102 bool is_iomem;
103 int r;
104
105 if (bo->vmap) {
106 if (ptr)
107 *ptr = bo->vmap;
108 return 0;
109 }
110 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
111 if (r)
112 return r;
113 bo->vmap = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
114 if (ptr)
115 *ptr = bo->vmap;
116 return 0;
117}
118
119int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
120 struct virtio_gpu_object *bo)
121{
122 int ret;
123 struct page **pages = bo->tbo.ttm->pages;
124 int nr_pages = bo->tbo.num_pages;
125
126 /* wtf swapping */
127 if (bo->pages)
128 return 0;
129
130 if (bo->tbo.ttm->state == tt_unpopulated)
131 bo->tbo.ttm->bdev->driver->ttm_tt_populate(bo->tbo.ttm);
132 bo->pages = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
133 if (!bo->pages)
134 goto out;
135
136 ret = sg_alloc_table_from_pages(bo->pages, pages, nr_pages, 0,
137 nr_pages << PAGE_SHIFT, GFP_KERNEL);
138 if (ret)
139 goto out;
140 return 0;
141out:
142 kfree(bo->pages);
143 bo->pages = NULL;
144 return -ENOMEM;
145}
146
147void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo)
148{
149 sg_free_table(bo->pages);
150 kfree(bo->pages);
151 bo->pages = NULL;
152}
153
154int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait)
155{
156 int r;
157
158 r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, NULL);
159 if (unlikely(r != 0))
160 return r;
161 r = ttm_bo_wait(&bo->tbo, true, true, no_wait);
162 ttm_bo_unreserve(&bo->tbo);
163 return r;
164}
165
1/*
2 * Copyright (C) 2015 Red Hat, Inc.
3 * All Rights Reserved.
4 *
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:
12 *
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.
16 *
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.
24 */
25
26#include <linux/dma-mapping.h>
27#include <linux/moduleparam.h>
28
29#include "virtgpu_drv.h"
30
31static int virtio_gpu_virglrenderer_workaround = 1;
32module_param_named(virglhack, virtio_gpu_virglrenderer_workaround, int, 0400);
33
34int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, uint32_t *resid)
35{
36 if (virtio_gpu_virglrenderer_workaround) {
37 /*
38 * Hack to avoid re-using resource IDs.
39 *
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.
44 */
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;
53 }
54 return 0;
55}
56
57static void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
58{
59 if (!virtio_gpu_virglrenderer_workaround) {
60 ida_free(&vgdev->resource_ida, id - 1);
61 }
62}
63
64void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo)
65{
66 struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
67
68 virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
69 if (virtio_gpu_is_shmem(bo)) {
70 drm_gem_shmem_free(&bo->base);
71 } else if (virtio_gpu_is_vram(bo)) {
72 struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo);
73
74 spin_lock(&vgdev->host_visible_lock);
75 if (drm_mm_node_allocated(&vram->vram_node))
76 drm_mm_remove_node(&vram->vram_node);
77
78 spin_unlock(&vgdev->host_visible_lock);
79
80 drm_gem_free_mmap_offset(&vram->base.base.base);
81 drm_gem_object_release(&vram->base.base.base);
82 kfree(vram);
83 }
84}
85
86static void virtio_gpu_free_object(struct drm_gem_object *obj)
87{
88 struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
89 struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
90
91 if (bo->created) {
92 virtio_gpu_cmd_unref_resource(vgdev, bo);
93 virtio_gpu_notify(vgdev);
94 /* completion handler calls virtio_gpu_cleanup_object() */
95 return;
96 }
97 virtio_gpu_cleanup_object(bo);
98}
99
100static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = {
101 .free = virtio_gpu_free_object,
102 .open = virtio_gpu_gem_object_open,
103 .close = virtio_gpu_gem_object_close,
104 .print_info = drm_gem_shmem_object_print_info,
105 .export = virtgpu_gem_prime_export,
106 .pin = drm_gem_shmem_object_pin,
107 .unpin = drm_gem_shmem_object_unpin,
108 .get_sg_table = drm_gem_shmem_object_get_sg_table,
109 .vmap = drm_gem_shmem_object_vmap,
110 .vunmap = drm_gem_shmem_object_vunmap,
111 .mmap = drm_gem_shmem_object_mmap,
112 .vm_ops = &drm_gem_shmem_vm_ops,
113};
114
115bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo)
116{
117 return bo->base.base.funcs == &virtio_gpu_shmem_funcs;
118}
119
120struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,
121 size_t size)
122{
123 struct virtio_gpu_object_shmem *shmem;
124 struct drm_gem_shmem_object *dshmem;
125
126 shmem = kzalloc(sizeof(*shmem), GFP_KERNEL);
127 if (!shmem)
128 return ERR_PTR(-ENOMEM);
129
130 dshmem = &shmem->base.base;
131 dshmem->base.funcs = &virtio_gpu_shmem_funcs;
132 return &dshmem->base;
133}
134
135static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev,
136 struct virtio_gpu_object *bo,
137 struct virtio_gpu_mem_entry **ents,
138 unsigned int *nents)
139{
140 bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);
141 struct scatterlist *sg;
142 struct sg_table *pages;
143 int si;
144
145 pages = drm_gem_shmem_get_pages_sgt(&bo->base);
146 if (IS_ERR(pages))
147 return PTR_ERR(pages);
148
149 if (use_dma_api)
150 *nents = pages->nents;
151 else
152 *nents = pages->orig_nents;
153
154 *ents = kvmalloc_array(*nents,
155 sizeof(struct virtio_gpu_mem_entry),
156 GFP_KERNEL);
157 if (!(*ents)) {
158 DRM_ERROR("failed to allocate ent list\n");
159 return -ENOMEM;
160 }
161
162 if (use_dma_api) {
163 for_each_sgtable_dma_sg(pages, sg, si) {
164 (*ents)[si].addr = cpu_to_le64(sg_dma_address(sg));
165 (*ents)[si].length = cpu_to_le32(sg_dma_len(sg));
166 (*ents)[si].padding = 0;
167 }
168 } else {
169 for_each_sgtable_sg(pages, sg, si) {
170 (*ents)[si].addr = cpu_to_le64(sg_phys(sg));
171 (*ents)[si].length = cpu_to_le32(sg->length);
172 (*ents)[si].padding = 0;
173 }
174 }
175
176 return 0;
177}
178
179int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
180 struct virtio_gpu_object_params *params,
181 struct virtio_gpu_object **bo_ptr,
182 struct virtio_gpu_fence *fence)
183{
184 struct virtio_gpu_object_array *objs = NULL;
185 struct drm_gem_shmem_object *shmem_obj;
186 struct virtio_gpu_object *bo;
187 struct virtio_gpu_mem_entry *ents = NULL;
188 unsigned int nents;
189 int ret;
190
191 *bo_ptr = NULL;
192
193 params->size = roundup(params->size, PAGE_SIZE);
194 shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size);
195 if (IS_ERR(shmem_obj))
196 return PTR_ERR(shmem_obj);
197 bo = gem_to_virtio_gpu_obj(&shmem_obj->base);
198
199 ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);
200 if (ret < 0)
201 goto err_free_gem;
202
203 bo->dumb = params->dumb;
204
205 ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents);
206 if (ret != 0)
207 goto err_put_id;
208
209 if (fence) {
210 ret = -ENOMEM;
211 objs = virtio_gpu_array_alloc(1);
212 if (!objs)
213 goto err_free_entry;
214 virtio_gpu_array_add_obj(objs, &bo->base.base);
215
216 ret = virtio_gpu_array_lock_resv(objs);
217 if (ret != 0)
218 goto err_put_objs;
219 }
220
221 if (params->blob) {
222 if (params->blob_mem == VIRTGPU_BLOB_MEM_GUEST)
223 bo->guest_blob = true;
224
225 virtio_gpu_cmd_resource_create_blob(vgdev, bo, params,
226 ents, nents);
227 } else if (params->virgl) {
228 virtio_gpu_cmd_resource_create_3d(vgdev, bo, params,
229 objs, fence);
230 virtio_gpu_object_attach(vgdev, bo, ents, nents);
231 } else {
232 virtio_gpu_cmd_create_resource(vgdev, bo, params,
233 objs, fence);
234 virtio_gpu_object_attach(vgdev, bo, ents, nents);
235 }
236
237 *bo_ptr = bo;
238 return 0;
239
240err_put_objs:
241 virtio_gpu_array_put_free(objs);
242err_free_entry:
243 kvfree(ents);
244err_put_id:
245 virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
246err_free_gem:
247 drm_gem_shmem_free(shmem_obj);
248 return ret;
249}