drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "vmwgfx_drv.h"
  29 #include <drm/vmwgfx_drm.h>
  30 #include "vmwgfx_kms.h"
  31
  32 struct svga_3d_compat_cap {
  33         SVGA3dCapsRecordHeader header;
  34         SVGA3dCapPair pairs[SVGA3D_DEVCAP_MAX];
  35 };
  36
  37 int vmw_getparam_ioctl(struct drm_device *dev, void *data,
  38                        struct drm_file *file_priv)
  39 {
  40         struct vmw_private *dev_priv = vmw_priv(dev);
  41         struct drm_vmw_getparam_arg *param =
  42             (struct drm_vmw_getparam_arg *)data;
  43         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
  44
  45         switch (param->param) {
  46         case DRM_VMW_PARAM_NUM_STREAMS:
  47                 param->value = vmw_overlay_num_overlays(dev_priv);
  48                 break;
  49         case DRM_VMW_PARAM_NUM_FREE_STREAMS:
  50                 param->value = vmw_overlay_num_free_overlays(dev_priv);
  51                 break;
  52         case DRM_VMW_PARAM_3D:
  53                 param->value = vmw_fifo_have_3d(dev_priv) ? 1 : 0;
  54                 break;
  55         case DRM_VMW_PARAM_HW_CAPS:
  56                 param->value = dev_priv->capabilities;
  57                 break;
  58         case DRM_VMW_PARAM_FIFO_CAPS:
  59                 param->value = dev_priv->fifo.capabilities;
  60                 break;
  61         case DRM_VMW_PARAM_MAX_FB_SIZE:
  62                 param->value = dev_priv->prim_bb_mem;
  63                 break;
  64         case DRM_VMW_PARAM_FIFO_HW_VERSION:
  65         {
  66                 __le32 __iomem *fifo_mem = dev_priv->mmio_virt;
  67                 const struct vmw_fifo_state *fifo = &dev_priv->fifo;
  68
  69                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS)) {
  70                         param->value = SVGA3D_HWVERSION_WS8_B1;
  71                         break;
  72                 }
  73
  74                 param->value =
  75                         ioread32(fifo_mem +
  76                                  ((fifo->capabilities &
  77                                    SVGA_FIFO_CAP_3D_HWVERSION_REVISED) ?
  78                                   SVGA_FIFO_3D_HWVERSION_REVISED :
  79                                   SVGA_FIFO_3D_HWVERSION));
  80                 break;
  81         }
  82         case DRM_VMW_PARAM_MAX_SURF_MEMORY:
  83                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  84                     !vmw_fp->gb_aware)
  85                         param->value = dev_priv->max_mob_pages * PAGE_SIZE / 2;
  86                 else
  87                         param->value = dev_priv->memory_size;
  88                 break;
  89         case DRM_VMW_PARAM_3D_CAPS_SIZE:
  90                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  91                     vmw_fp->gb_aware)
  92                         param->value = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
  93                 else if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS)
  94                         param->value = sizeof(struct svga_3d_compat_cap) +
  95                                 sizeof(uint32_t);
  96                 else
  97                         param->value = (SVGA_FIFO_3D_CAPS_LAST -
  98                                         SVGA_FIFO_3D_CAPS + 1) *
  99                                 sizeof(uint32_t);
 100                 break;
 101         case DRM_VMW_PARAM_MAX_MOB_MEMORY:
 102                 vmw_fp->gb_aware = true;
 103                 param->value = dev_priv->max_mob_pages * PAGE_SIZE;
 104                 break;
 105         case DRM_VMW_PARAM_MAX_MOB_SIZE:
 106                 param->value = dev_priv->max_mob_size;
 107                 break;
 108         default:
 109                 DRM_ERROR("Illegal vmwgfx get param request: %d\n",
 110                           param->param);
 111                 return -EINVAL;
 112         }
 113
 114         return 0;
 115 }
 116
 117 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 118                                size_t size)
 119 {
 120         struct svga_3d_compat_cap *compat_cap =
 121                 (struct svga_3d_compat_cap *) bounce;
 122         unsigned int i;
 123         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 124         unsigned int max_size;
 125
 126         if (size < pair_offset)
 127                 return -EINVAL;
 128
 129         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 130
 131         if (max_size > SVGA3D_DEVCAP_MAX)
 132                 max_size = SVGA3D_DEVCAP_MAX;
 133
 134         compat_cap->header.length =
 135                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 136         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 137
 138         spin_lock(&dev_priv->cap_lock);
 139         for (i = 0; i < max_size; ++i) {
 140                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 141                 compat_cap->pairs[i][0] = i;
 142                 compat_cap->pairs[i][1] = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
 143         }
 144         spin_unlock(&dev_priv->cap_lock);
 145
 146         return 0;
 147 }
 148
 149
 150 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 151                          struct drm_file *file_priv)
 152 {
 153         struct drm_vmw_get_3d_cap_arg *arg =
 154                 (struct drm_vmw_get_3d_cap_arg *) data;
 155         struct vmw_private *dev_priv = vmw_priv(dev);
 156         uint32_t size;
 157         __le32 __iomem *fifo_mem;
 158         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 159         void *bounce;
 160         int ret;
 161         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 162         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 163
 164         if (unlikely(arg->pad64 != 0)) {
 165                 DRM_ERROR("Illegal GET_3D_CAP argument.\n");
 166                 return -EINVAL;
 167         }
 168
 169         if (gb_objects && vmw_fp->gb_aware)
 170                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 171         else if (gb_objects)
 172                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 173         else
 174                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 175                         sizeof(uint32_t);
 176
 177         if (arg->max_size < size)
 178                 size = arg->max_size;
 179
 180         bounce = vzalloc(size);
 181         if (unlikely(bounce == NULL)) {
 182                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 183                 return -ENOMEM;
 184         }
 185
 186         if (gb_objects && vmw_fp->gb_aware) {
 187                 int i, num;
 188                 uint32_t *bounce32 = (uint32_t *) bounce;
 189
 190                 num = size / sizeof(uint32_t);
 191                 if (num > SVGA3D_DEVCAP_MAX)
 192                         num = SVGA3D_DEVCAP_MAX;
 193
 194                 spin_lock(&dev_priv->cap_lock);
 195                 for (i = 0; i < num; ++i) {
 196                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 197                         *bounce32++ = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
 198                 }
 199                 spin_unlock(&dev_priv->cap_lock);
 200         } else if (gb_objects) {
 201                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 202                 if (unlikely(ret != 0))
 203                         goto out_err;
 204         } else {
 205                 fifo_mem = dev_priv->mmio_virt;
 206                 memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 207         }
 208
 209         ret = copy_to_user(buffer, bounce, size);
 210         if (ret)
 211                 ret = -EFAULT;
 212 out_err:
 213         vfree(bounce);
 214
 215         if (unlikely(ret != 0))
 216                 DRM_ERROR("Failed to report 3D caps info.\n");
 217
 218         return ret;
 219 }
 220
 221 int vmw_present_ioctl(struct drm_device *dev, void *data,
 222                       struct drm_file *file_priv)
 223 {
 224         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 225         struct vmw_private *dev_priv = vmw_priv(dev);
 226         struct drm_vmw_present_arg *arg =
 227                 (struct drm_vmw_present_arg *)data;
 228         struct vmw_surface *surface;
 229         struct drm_vmw_rect __user *clips_ptr;
 230         struct drm_vmw_rect *clips = NULL;
 231         struct drm_framebuffer *fb;
 232         struct vmw_framebuffer *vfb;
 233         struct vmw_resource *res;
 234         uint32_t num_clips;
 235         int ret;
 236
 237         num_clips = arg->num_clips;
 238         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 239
 240         if (unlikely(num_clips == 0))
 241                 return 0;
 242
 243         if (clips_ptr == NULL) {
 244                 DRM_ERROR("Variable clips_ptr must be specified.\n");
 245                 ret = -EINVAL;
 246                 goto out_clips;
 247         }
 248
 249         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 250         if (clips == NULL) {
 251                 DRM_ERROR("Failed to allocate clip rect list.\n");
 252                 ret = -ENOMEM;
 253                 goto out_clips;
 254         }
 255
 256         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 257         if (ret) {
 258                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 259                 ret = -EFAULT;
 260                 goto out_no_copy;
 261         }
 262
 263         drm_modeset_lock_all(dev);
 264
 265         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 266         if (!fb) {
 267                 DRM_ERROR("Invalid framebuffer id.\n");
 268                 ret = -ENOENT;
 269                 goto out_no_fb;
 270         }
 271         vfb = vmw_framebuffer_to_vfb(fb);
 272
 273         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 274         if (unlikely(ret != 0))
 275                 goto out_no_ttm_lock;
 276
 277         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 278                                               user_surface_converter,
 279                                               &res);
 280         if (ret)
 281                 goto out_no_surface;
 282
 283         surface = vmw_res_to_srf(res);
 284         ret = vmw_kms_present(dev_priv, file_priv,
 285                               vfb, surface, arg->sid,
 286                               arg->dest_x, arg->dest_y,
 287                               clips, num_clips);
 288
 289         /* vmw_user_surface_lookup takes one ref so does new_fb */
 290         vmw_surface_unreference(&surface);
 291
 292 out_no_surface:
 293         ttm_read_unlock(&dev_priv->reservation_sem);
 294 out_no_ttm_lock:
 295         drm_framebuffer_unreference(fb);
 296 out_no_fb:
 297         drm_modeset_unlock_all(dev);
 298 out_no_copy:
 299         kfree(clips);
 300 out_clips:
 301         return ret;
 302 }
 303
 304 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 305                                struct drm_file *file_priv)
 306 {
 307         struct vmw_private *dev_priv = vmw_priv(dev);
 308         struct drm_vmw_present_readback_arg *arg =
 309                 (struct drm_vmw_present_readback_arg *)data;
 310         struct drm_vmw_fence_rep __user *user_fence_rep =
 311                 (struct drm_vmw_fence_rep __user *)
 312                 (unsigned long)arg->fence_rep;
 313         struct drm_vmw_rect __user *clips_ptr;
 314         struct drm_vmw_rect *clips = NULL;
 315         struct drm_framebuffer *fb;
 316         struct vmw_framebuffer *vfb;
 317         uint32_t num_clips;
 318         int ret;
 319
 320         num_clips = arg->num_clips;
 321         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 322
 323         if (unlikely(num_clips == 0))
 324                 return 0;
 325
 326         if (clips_ptr == NULL) {
 327                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 328                 ret = -EINVAL;
 329                 goto out_clips;
 330         }
 331
 332         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 333         if (clips == NULL) {
 334                 DRM_ERROR("Failed to allocate clip rect list.\n");
 335                 ret = -ENOMEM;
 336                 goto out_clips;
 337         }
 338
 339         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 340         if (ret) {
 341                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 342                 ret = -EFAULT;
 343                 goto out_no_copy;
 344         }
 345
 346         drm_modeset_lock_all(dev);
 347
 348         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 349         if (!fb) {
 350                 DRM_ERROR("Invalid framebuffer id.\n");
 351                 ret = -ENOENT;
 352                 goto out_no_fb;
 353         }
 354
 355         vfb = vmw_framebuffer_to_vfb(fb);
 356         if (!vfb->dmabuf) {
 357                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 358                 ret = -EINVAL;
 359                 goto out_no_ttm_lock;
 360         }
 361
 362         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 363         if (unlikely(ret != 0))
 364                 goto out_no_ttm_lock;
 365
 366         ret = vmw_kms_readback(dev_priv, file_priv,
 367                                vfb, user_fence_rep,
 368                                clips, num_clips);
 369
 370         ttm_read_unlock(&dev_priv->reservation_sem);
 371 out_no_ttm_lock:
 372         drm_framebuffer_unreference(fb);
 373 out_no_fb:
 374         drm_modeset_unlock_all(dev);
 375 out_no_copy:
 376         kfree(clips);
 377 out_clips:
 378         return ret;
 379 }
 380
 381
 382 /**
 383  * vmw_fops_poll - wrapper around the drm_poll function
 384  *
 385  * @filp: See the linux fops poll documentation.
 386  * @wait: See the linux fops poll documentation.
 387  *
 388  * Wrapper around the drm_poll function that makes sure the device is
 389  * processing the fifo if drm_poll decides to wait.
 390  */
 391 unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 392 {
 393         struct drm_file *file_priv = filp->private_data;
 394         struct vmw_private *dev_priv =
 395                 vmw_priv(file_priv->minor->dev);
 396
 397         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 398         return drm_poll(filp, wait);
 399 }
 400
 401
 402 /**
 403  * vmw_fops_read - wrapper around the drm_read function
 404  *
 405  * @filp: See the linux fops read documentation.
 406  * @buffer: See the linux fops read documentation.
 407  * @count: See the linux fops read documentation.
 408  * offset: See the linux fops read documentation.
 409  *
 410  * Wrapper around the drm_read function that makes sure the device is
 411  * processing the fifo if drm_read decides to wait.
 412  */
 413 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 414                       size_t count, loff_t *offset)
 415 {
 416         struct drm_file *file_priv = filp->private_data;
 417         struct vmw_private *dev_priv =
 418                 vmw_priv(file_priv->minor->dev);
 419
 420         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 421         return drm_read(filp, buffer, count, offset);
 422 }