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 <drm/drm_file.h> 27 #include <drm/drm_fourcc.h> 28 29 #include "virtgpu_drv.h" 30 31 int virtio_gpu_gem_create(struct drm_file *file, 32 struct drm_device *dev, 33 struct virtio_gpu_object_params *params, 34 struct drm_gem_object **obj_p, 35 uint32_t *handle_p) 36 { 37 struct virtio_gpu_device *vgdev = dev->dev_private; 38 struct virtio_gpu_object *obj; 39 int ret; 40 u32 handle; 41 42 ret = virtio_gpu_object_create(vgdev, params, &obj, NULL); 43 if (ret < 0) 44 return ret; 45 46 ret = drm_gem_handle_create(file, &obj->base.base, &handle); 47 if (ret) { 48 drm_gem_object_release(&obj->base.base); 49 return ret; 50 } 51 52 *obj_p = &obj->base.base; 53 54 /* drop reference from allocate - handle holds it now */ 55 drm_gem_object_put_unlocked(&obj->base.base); 56 57 *handle_p = handle; 58 return 0; 59 } 60 61 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, 62 struct drm_device *dev, 63 struct drm_mode_create_dumb *args) 64 { 65 struct drm_gem_object *gobj; 66 struct virtio_gpu_object_params params = { 0 }; 67 int ret; 68 uint32_t pitch; 69 70 if (args->bpp != 32) 71 return -EINVAL; 72 73 pitch = args->width * 4; 74 args->size = pitch * args->height; 75 args->size = ALIGN(args->size, PAGE_SIZE); 76 77 params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888); 78 params.width = args->width; 79 params.height = args->height; 80 params.size = args->size; 81 params.dumb = true; 82 ret = virtio_gpu_gem_create(file_priv, dev, ¶ms, &gobj, 83 &args->handle); 84 if (ret) 85 goto fail; 86 87 args->pitch = pitch; 88 return ret; 89 90 fail: 91 return ret; 92 } 93 94 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv, 95 struct drm_device *dev, 96 uint32_t handle, uint64_t *offset_p) 97 { 98 struct drm_gem_object *gobj; 99 100 BUG_ON(!offset_p); 101 gobj = drm_gem_object_lookup(file_priv, handle); 102 if (gobj == NULL) 103 return -ENOENT; 104 *offset_p = drm_vma_node_offset_addr(&gobj->vma_node); 105 drm_gem_object_put_unlocked(gobj); 106 return 0; 107 } 108 109 int virtio_gpu_gem_object_open(struct drm_gem_object *obj, 110 struct drm_file *file) 111 { 112 struct virtio_gpu_device *vgdev = obj->dev->dev_private; 113 struct virtio_gpu_fpriv *vfpriv = file->driver_priv; 114 struct virtio_gpu_object_array *objs; 115 116 if (!vgdev->has_virgl_3d) 117 return 0; 118 119 objs = virtio_gpu_array_alloc(1); 120 if (!objs) 121 return -ENOMEM; 122 virtio_gpu_array_add_obj(objs, obj); 123 124 virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id, 125 objs); 126 return 0; 127 } 128 129 void virtio_gpu_gem_object_close(struct drm_gem_object *obj, 130 struct drm_file *file) 131 { 132 struct virtio_gpu_device *vgdev = obj->dev->dev_private; 133 struct virtio_gpu_fpriv *vfpriv = file->driver_priv; 134 struct virtio_gpu_object_array *objs; 135 136 if (!vgdev->has_virgl_3d) 137 return; 138 139 objs = virtio_gpu_array_alloc(1); 140 if (!objs) 141 return; 142 virtio_gpu_array_add_obj(objs, obj); 143 144 virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id, 145 objs); 146 } 147 148 struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents) 149 { 150 struct virtio_gpu_object_array *objs; 151 size_t size = sizeof(*objs) + sizeof(objs->objs[0]) * nents; 152 153 objs = kmalloc(size, GFP_KERNEL); 154 if (!objs) 155 return NULL; 156 157 objs->nents = 0; 158 objs->total = nents; 159 return objs; 160 } 161 162 static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs) 163 { 164 kfree(objs); 165 } 166 167 struct virtio_gpu_object_array* 168 virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents) 169 { 170 struct virtio_gpu_object_array *objs; 171 u32 i; 172 173 objs = virtio_gpu_array_alloc(nents); 174 if (!objs) 175 return NULL; 176 177 for (i = 0; i < nents; i++) { 178 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]); 179 if (!objs->objs[i]) { 180 objs->nents = i; 181 virtio_gpu_array_put_free(objs); 182 return NULL; 183 } 184 } 185 objs->nents = i; 186 return objs; 187 } 188 189 void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs, 190 struct drm_gem_object *obj) 191 { 192 if (WARN_ON_ONCE(objs->nents == objs->total)) 193 return; 194 195 drm_gem_object_get(obj); 196 objs->objs[objs->nents] = obj; 197 objs->nents++; 198 } 199 200 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs) 201 { 202 int ret; 203 204 if (objs->nents == 1) { 205 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL); 206 } else { 207 ret = drm_gem_lock_reservations(objs->objs, objs->nents, 208 &objs->ticket); 209 } 210 return ret; 211 } 212 213 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs) 214 { 215 if (objs->nents == 1) { 216 dma_resv_unlock(objs->objs[0]->resv); 217 } else { 218 drm_gem_unlock_reservations(objs->objs, objs->nents, 219 &objs->ticket); 220 } 221 } 222 223 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs, 224 struct dma_fence *fence) 225 { 226 int i; 227 228 for (i = 0; i < objs->nents; i++) 229 dma_resv_add_excl_fence(objs->objs[i]->resv, fence); 230 } 231 232 void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs) 233 { 234 u32 i; 235 236 for (i = 0; i < objs->nents; i++) 237 drm_gem_object_put_unlocked(objs->objs[i]); 238 virtio_gpu_array_free(objs); 239 } 240 241 void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev, 242 struct virtio_gpu_object_array *objs) 243 { 244 spin_lock(&vgdev->obj_free_lock); 245 list_add_tail(&objs->next, &vgdev->obj_free_list); 246 spin_unlock(&vgdev->obj_free_lock); 247 schedule_work(&vgdev->obj_free_work); 248 } 249 250 void virtio_gpu_array_put_free_work(struct work_struct *work) 251 { 252 struct virtio_gpu_device *vgdev = 253 container_of(work, struct virtio_gpu_device, obj_free_work); 254 struct virtio_gpu_object_array *objs; 255 256 spin_lock(&vgdev->obj_free_lock); 257 while (!list_empty(&vgdev->obj_free_list)) { 258 objs = list_first_entry(&vgdev->obj_free_list, 259 struct virtio_gpu_object_array, next); 260 list_del(&objs->next); 261 spin_unlock(&vgdev->obj_free_lock); 262 virtio_gpu_array_put_free(objs); 263 spin_lock(&vgdev->obj_free_lock); 264 } 265 spin_unlock(&vgdev->obj_free_lock); 266 } 267