1 /* $NetBSD: virtgpu_gem.c,v 1.3 2021/12/18 23:45:45 riastradh Exp $ */ 2 3 /* 4 * Copyright (C) 2015 Red Hat, Inc. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining 8 * a copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sublicense, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial 17 * portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 22 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: virtgpu_gem.c,v 1.3 2021/12/18 23:45:45 riastradh Exp $"); 30 31 #include <drm/drm_file.h> 32 #include <drm/drm_fourcc.h> 33 34 #include "virtgpu_drv.h" 35 36 int virtio_gpu_gem_create(struct drm_file *file, 37 struct drm_device *dev, 38 struct virtio_gpu_object_params *params, 39 struct drm_gem_object **obj_p, 40 uint32_t *handle_p) 41 { 42 struct virtio_gpu_device *vgdev = dev->dev_private; 43 struct virtio_gpu_object *obj; 44 int ret; 45 u32 handle; 46 47 ret = virtio_gpu_object_create(vgdev, params, &obj, NULL); 48 if (ret < 0) 49 return ret; 50 51 ret = drm_gem_handle_create(file, &obj->base.base, &handle); 52 if (ret) { 53 drm_gem_object_release(&obj->base.base); 54 return ret; 55 } 56 57 *obj_p = &obj->base.base; 58 59 /* drop reference from allocate - handle holds it now */ 60 drm_gem_object_put_unlocked(&obj->base.base); 61 62 *handle_p = handle; 63 return 0; 64 } 65 66 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, 67 struct drm_device *dev, 68 struct drm_mode_create_dumb *args) 69 { 70 struct drm_gem_object *gobj; 71 struct virtio_gpu_object_params params = { 0 }; 72 int ret; 73 uint32_t pitch; 74 75 if (args->bpp != 32) 76 return -EINVAL; 77 78 pitch = args->width * 4; 79 args->size = pitch * args->height; 80 args->size = ALIGN(args->size, PAGE_SIZE); 81 82 params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888); 83 params.width = args->width; 84 params.height = args->height; 85 params.size = args->size; 86 params.dumb = true; 87 ret = virtio_gpu_gem_create(file_priv, dev, ¶ms, &gobj, 88 &args->handle); 89 if (ret) 90 goto fail; 91 92 args->pitch = pitch; 93 return ret; 94 95 fail: 96 return ret; 97 } 98 99 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv, 100 struct drm_device *dev, 101 uint32_t handle, uint64_t *offset_p) 102 { 103 struct drm_gem_object *gobj; 104 105 BUG_ON(!offset_p); 106 gobj = drm_gem_object_lookup(file_priv, handle); 107 if (gobj == NULL) 108 return -ENOENT; 109 *offset_p = drm_vma_node_offset_addr(&gobj->vma_node); 110 drm_gem_object_put_unlocked(gobj); 111 return 0; 112 } 113 114 int virtio_gpu_gem_object_open(struct drm_gem_object *obj, 115 struct drm_file *file) 116 { 117 struct virtio_gpu_device *vgdev = obj->dev->dev_private; 118 struct virtio_gpu_fpriv *vfpriv = file->driver_priv; 119 struct virtio_gpu_object_array *objs; 120 121 if (!vgdev->has_virgl_3d) 122 return 0; 123 124 objs = virtio_gpu_array_alloc(1); 125 if (!objs) 126 return -ENOMEM; 127 virtio_gpu_array_add_obj(objs, obj); 128 129 virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id, 130 objs); 131 return 0; 132 } 133 134 void virtio_gpu_gem_object_close(struct drm_gem_object *obj, 135 struct drm_file *file) 136 { 137 struct virtio_gpu_device *vgdev = obj->dev->dev_private; 138 struct virtio_gpu_fpriv *vfpriv = file->driver_priv; 139 struct virtio_gpu_object_array *objs; 140 141 if (!vgdev->has_virgl_3d) 142 return; 143 144 objs = virtio_gpu_array_alloc(1); 145 if (!objs) 146 return; 147 virtio_gpu_array_add_obj(objs, obj); 148 149 virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id, 150 objs); 151 } 152 153 struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents) 154 { 155 struct virtio_gpu_object_array *objs; 156 size_t size = sizeof(*objs) + sizeof(objs->objs[0]) * nents; 157 158 objs = kmalloc(size, GFP_KERNEL); 159 if (!objs) 160 return NULL; 161 162 objs->nents = 0; 163 objs->total = nents; 164 return objs; 165 } 166 167 static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs) 168 { 169 kfree(objs); 170 } 171 172 struct virtio_gpu_object_array* 173 virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents) 174 { 175 struct virtio_gpu_object_array *objs; 176 u32 i; 177 178 objs = virtio_gpu_array_alloc(nents); 179 if (!objs) 180 return NULL; 181 182 for (i = 0; i < nents; i++) { 183 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]); 184 if (!objs->objs[i]) { 185 objs->nents = i; 186 virtio_gpu_array_put_free(objs); 187 return NULL; 188 } 189 } 190 objs->nents = i; 191 return objs; 192 } 193 194 void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs, 195 struct drm_gem_object *obj) 196 { 197 if (WARN_ON_ONCE(objs->nents == objs->total)) 198 return; 199 200 drm_gem_object_get(obj); 201 objs->objs[objs->nents] = obj; 202 objs->nents++; 203 } 204 205 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs) 206 { 207 int ret; 208 209 if (objs->nents == 1) { 210 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL); 211 } else { 212 ret = drm_gem_lock_reservations(objs->objs, objs->nents, 213 &objs->ticket); 214 } 215 return ret; 216 } 217 218 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs) 219 { 220 if (objs->nents == 1) { 221 dma_resv_unlock(objs->objs[0]->resv); 222 } else { 223 drm_gem_unlock_reservations(objs->objs, objs->nents, 224 &objs->ticket); 225 } 226 } 227 228 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs, 229 struct dma_fence *fence) 230 { 231 int i; 232 233 for (i = 0; i < objs->nents; i++) 234 dma_resv_add_excl_fence(objs->objs[i]->resv, fence); 235 } 236 237 void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs) 238 { 239 u32 i; 240 241 for (i = 0; i < objs->nents; i++) 242 drm_gem_object_put_unlocked(objs->objs[i]); 243 virtio_gpu_array_free(objs); 244 } 245 246 void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev, 247 struct virtio_gpu_object_array *objs) 248 { 249 spin_lock(&vgdev->obj_free_lock); 250 list_add_tail(&objs->next, &vgdev->obj_free_list); 251 spin_unlock(&vgdev->obj_free_lock); 252 schedule_work(&vgdev->obj_free_work); 253 } 254 255 void virtio_gpu_array_put_free_work(struct work_struct *work) 256 { 257 struct virtio_gpu_device *vgdev = 258 container_of(work, struct virtio_gpu_device, obj_free_work); 259 struct virtio_gpu_object_array *objs; 260 261 spin_lock(&vgdev->obj_free_lock); 262 while (!list_empty(&vgdev->obj_free_list)) { 263 objs = list_first_entry(&vgdev->obj_free_list, 264 struct virtio_gpu_object_array, next); 265 list_del(&objs->next); 266 spin_unlock(&vgdev->obj_free_lock); 267 virtio_gpu_array_put_free(objs); 268 spin_lock(&vgdev->obj_free_lock); 269 } 270 spin_unlock(&vgdev->obj_free_lock); 271 } 272
Indexes created Sat Sep 20 22:09:52 GMT 2025