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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 obtaining6 * a copy of this software and associated documentation files (the7 * "Software"), to deal in the Software without restriction, including8 * without limitation the rights to use, copy, modify, merge, publish,9 * distribute, sublicense, and/or sell copies of the Software, and to10 * permit persons to whom the Software is furnished to do so, subject to11 * the following conditions:12 *13 * The above copyright notice and this permission notice (including the14 * next paragraph) shall be included in all copies or substantial15 * 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 OF19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION23 * 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 31static 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(&obj->base.base);56 57 *handle_p = handle;58 return 0;59}60 61int 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 struct virtio_gpu_device *vgdev = dev->dev_private;68 int ret;69 uint32_t pitch;70 71 if (args->bpp != 32)72 return -EINVAL;73 74 pitch = args->width * 4;75 args->size = pitch * args->height;76 args->size = ALIGN(args->size, PAGE_SIZE);77 78 params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);79 params.width = args->width;80 params.height = args->height;81 params.size = args->size;82 params.dumb = true;83 84 if (vgdev->has_resource_blob && !vgdev->has_virgl_3d) {85 params.blob_mem = VIRTGPU_BLOB_MEM_GUEST;86 params.blob_flags = VIRTGPU_BLOB_FLAG_USE_SHAREABLE;87 params.blob = true;88 }89 90 ret = virtio_gpu_gem_create(file_priv, dev, ¶ms, &gobj,91 &args->handle);92 if (ret)93 goto fail;94 95 args->pitch = pitch;96 return ret;97 98fail:99 return ret;100}101 102int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,103 struct drm_device *dev,104 uint32_t handle, uint64_t *offset_p)105{106 struct drm_gem_object *gobj;107 108 BUG_ON(!offset_p);109 gobj = drm_gem_object_lookup(file_priv, handle);110 if (gobj == NULL)111 return -ENOENT;112 *offset_p = drm_vma_node_offset_addr(&gobj->vma_node);113 drm_gem_object_put(gobj);114 return 0;115}116 117int virtio_gpu_gem_object_open(struct drm_gem_object *obj,118 struct drm_file *file)119{120 struct virtio_gpu_device *vgdev = obj->dev->dev_private;121 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;122 struct virtio_gpu_object_array *objs;123 124 if (!vgdev->has_virgl_3d)125 goto out_notify;126 127 /* the context might still be missing when the first ioctl is128 * DRM_IOCTL_MODE_CREATE_DUMB or DRM_IOCTL_PRIME_FD_TO_HANDLE129 */130 virtio_gpu_create_context(obj->dev, file);131 132 objs = virtio_gpu_array_alloc(1);133 if (!objs)134 return -ENOMEM;135 virtio_gpu_array_add_obj(objs, obj);136 137 virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,138 objs);139out_notify:140 virtio_gpu_notify(vgdev);141 return 0;142}143 144void virtio_gpu_gem_object_close(struct drm_gem_object *obj,145 struct drm_file *file)146{147 struct virtio_gpu_device *vgdev = obj->dev->dev_private;148 struct virtio_gpu_fpriv *vfpriv = file->driver_priv;149 struct virtio_gpu_object_array *objs;150 151 if (!vgdev->has_virgl_3d)152 return;153 154 objs = virtio_gpu_array_alloc(1);155 if (!objs)156 return;157 virtio_gpu_array_add_obj(objs, obj);158 159 virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,160 objs);161 virtio_gpu_notify(vgdev);162}163 164struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)165{166 struct virtio_gpu_object_array *objs;167 168 objs = kmalloc(struct_size(objs, objs, nents), GFP_KERNEL);169 if (!objs)170 return NULL;171 172 objs->nents = 0;173 objs->total = nents;174 return objs;175}176 177static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)178{179 kfree(objs);180}181 182struct virtio_gpu_object_array*183virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents)184{185 struct virtio_gpu_object_array *objs;186 u32 i;187 188 objs = virtio_gpu_array_alloc(nents);189 if (!objs)190 return NULL;191 192 for (i = 0; i < nents; i++) {193 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);194 if (!objs->objs[i]) {195 objs->nents = i;196 virtio_gpu_array_put_free(objs);197 return NULL;198 }199 }200 objs->nents = i;201 return objs;202}203 204void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,205 struct drm_gem_object *obj)206{207 if (WARN_ON_ONCE(objs->nents == objs->total))208 return;209 210 drm_gem_object_get(obj);211 objs->objs[objs->nents] = obj;212 objs->nents++;213}214 215int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)216{217 unsigned int i;218 int ret;219 220 if (objs->nents == 1) {221 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);222 } else {223 ret = drm_gem_lock_reservations(objs->objs, objs->nents,224 &objs->ticket);225 }226 if (ret)227 return ret;228 229 for (i = 0; i < objs->nents; ++i) {230 ret = dma_resv_reserve_fences(objs->objs[i]->resv, 1);231 if (ret) {232 virtio_gpu_array_unlock_resv(objs);233 return ret;234 }235 }236 return ret;237}238 239void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)240{241 if (objs->nents == 1) {242 dma_resv_unlock(objs->objs[0]->resv);243 } else {244 drm_gem_unlock_reservations(objs->objs, objs->nents,245 &objs->ticket);246 }247}248 249void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,250 struct dma_fence *fence)251{252 int i;253 254 for (i = 0; i < objs->nents; i++)255 dma_resv_add_fence(objs->objs[i]->resv, fence,256 DMA_RESV_USAGE_WRITE);257}258 259void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)260{261 u32 i;262 263 if (!objs)264 return;265 266 for (i = 0; i < objs->nents; i++)267 drm_gem_object_put(objs->objs[i]);268 virtio_gpu_array_free(objs);269}270 271void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,272 struct virtio_gpu_object_array *objs)273{274 spin_lock(&vgdev->obj_free_lock);275 list_add_tail(&objs->next, &vgdev->obj_free_list);276 spin_unlock(&vgdev->obj_free_lock);277 schedule_work(&vgdev->obj_free_work);278}279 280void virtio_gpu_array_put_free_work(struct work_struct *work)281{282 struct virtio_gpu_device *vgdev =283 container_of(work, struct virtio_gpu_device, obj_free_work);284 struct virtio_gpu_object_array *objs;285 286 spin_lock(&vgdev->obj_free_lock);287 while (!list_empty(&vgdev->obj_free_list)) {288 objs = list_first_entry(&vgdev->obj_free_list,289 struct virtio_gpu_object_array, next);290 list_del(&objs->next);291 spin_unlock(&vgdev->obj_free_lock);292 virtio_gpu_array_put_free(objs);293 spin_lock(&vgdev->obj_free_lock);294 }295 spin_unlock(&vgdev->obj_free_lock);296}297