drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009-2015 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 #include "device_include/svga3d_caps.h"
  32
  33 struct svga_3d_compat_cap {
  34         SVGA3dCapsRecordHeader header;
  35         SVGA3dCapPair pairs[SVGA3D_DEVCAP_MAX];
  36 };
  37
  38 int vmw_getparam_ioctl(struct drm_device *dev, void *data,
  39                        struct drm_file *file_priv)
  40 {
  41         struct vmw_private *dev_priv = vmw_priv(dev);
  42         struct drm_vmw_getparam_arg *param =
  43             (struct drm_vmw_getparam_arg *)data;
  44         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
  45
  46         switch (param->param) {
  47         case DRM_VMW_PARAM_NUM_STREAMS:
  48                 param->value = vmw_overlay_num_overlays(dev_priv);
  49                 break;
  50         case DRM_VMW_PARAM_NUM_FREE_STREAMS:
  51                 param->value = vmw_overlay_num_free_overlays(dev_priv);
  52                 break;
  53         case DRM_VMW_PARAM_3D:
  54                 param->value = vmw_fifo_have_3d(dev_priv) ? 1 : 0;
  55                 break;
  56         case DRM_VMW_PARAM_HW_CAPS:
  57                 param->value = dev_priv->capabilities;
  58                 break;
  59         case DRM_VMW_PARAM_FIFO_CAPS:
  60                 param->value = dev_priv->fifo.capabilities;
  61                 break;
  62         case DRM_VMW_PARAM_MAX_FB_SIZE:
  63                 param->value = dev_priv->prim_bb_mem;
  64                 break;
  65         case DRM_VMW_PARAM_FIFO_HW_VERSION:
  66         {
  67                 u32 *fifo_mem = dev_priv->mmio_virt;
  68                 const struct vmw_fifo_state *fifo = &dev_priv->fifo;
  69
  70                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS)) {
  71                         param->value = SVGA3D_HWVERSION_WS8_B1;
  72                         break;
  73                 }
  74
  75                 param->value =
  76                         vmw_mmio_read(fifo_mem +
  77                                       ((fifo->capabilities &
  78                                         SVGA_FIFO_CAP_3D_HWVERSION_REVISED) ?
  79                                        SVGA_FIFO_3D_HWVERSION_REVISED :
  80                                        SVGA_FIFO_3D_HWVERSION));
  81                 break;
  82         }
  83         case DRM_VMW_PARAM_MAX_SURF_MEMORY:
  84                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  85                     !vmw_fp->gb_aware)
  86                         param->value = dev_priv->max_mob_pages * PAGE_SIZE / 2;
  87                 else
  88                         param->value = dev_priv->memory_size;
  89                 break;
  90         case DRM_VMW_PARAM_3D_CAPS_SIZE:
  91                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  92                     vmw_fp->gb_aware)
  93                         param->value = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
  94                 else if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS)
  95                         param->value = sizeof(struct svga_3d_compat_cap) +
  96                                 sizeof(uint32_t);
  97                 else
  98                         param->value = (SVGA_FIFO_3D_CAPS_LAST -
  99                                         SVGA_FIFO_3D_CAPS + 1) *
 100                                 sizeof(uint32_t);
 101                 break;
 102         case DRM_VMW_PARAM_MAX_MOB_MEMORY:
 103                 vmw_fp->gb_aware = true;
 104                 param->value = dev_priv->max_mob_pages * PAGE_SIZE;
 105                 break;
 106         case DRM_VMW_PARAM_MAX_MOB_SIZE:
 107                 param->value = dev_priv->max_mob_size;
 108                 break;
 109         case DRM_VMW_PARAM_SCREEN_TARGET:
 110                 param->value =
 111                         (dev_priv->active_display_unit == vmw_du_screen_target);
 112                 break;
 113         case DRM_VMW_PARAM_DX:
 114                 param->value = dev_priv->has_dx;
 115                 break;
 116         default:
 117                 return -EINVAL;
 118         }
 119
 120         return 0;
 121 }
 122
 123 static u32 vmw_mask_multisample(unsigned int cap, u32 fmt_value)
 124 {
 125         /* If the header is updated, update the format test as well! */
 126         BUILD_BUG_ON(SVGA3D_DEVCAP_DXFMT_BC5_UNORM + 1 != SVGA3D_DEVCAP_MAX);
 127
 128         if (cap >= SVGA3D_DEVCAP_DXFMT_X8R8G8B8 &&
 129             cap <= SVGA3D_DEVCAP_DXFMT_BC5_UNORM)
 130                 fmt_value &= ~(SVGADX_DXFMT_MULTISAMPLE_2 |
 131                                SVGADX_DXFMT_MULTISAMPLE_4 |
 132                                SVGADX_DXFMT_MULTISAMPLE_8);
 133         else if (cap == SVGA3D_DEVCAP_MULTISAMPLE_MASKABLESAMPLES)
 134                 return 0;
 135
 136         return fmt_value;
 137 }
 138
 139 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 140                                size_t size)
 141 {
 142         struct svga_3d_compat_cap *compat_cap =
 143                 (struct svga_3d_compat_cap *) bounce;
 144         unsigned int i;
 145         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 146         unsigned int max_size;
 147
 148         if (size < pair_offset)
 149                 return -EINVAL;
 150
 151         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 152
 153         if (max_size > SVGA3D_DEVCAP_MAX)
 154                 max_size = SVGA3D_DEVCAP_MAX;
 155
 156         compat_cap->header.length =
 157                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 158         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 159
 160         spin_lock(&dev_priv->cap_lock);
 161         for (i = 0; i < max_size; ++i) {
 162                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 163                 compat_cap->pairs[i][0] = i;
 164                 compat_cap->pairs[i][1] = vmw_mask_multisample
 165                         (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 166         }
 167         spin_unlock(&dev_priv->cap_lock);
 168
 169         return 0;
 170 }
 171
 172
 173 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 174                          struct drm_file *file_priv)
 175 {
 176         struct drm_vmw_get_3d_cap_arg *arg =
 177                 (struct drm_vmw_get_3d_cap_arg *) data;
 178         struct vmw_private *dev_priv = vmw_priv(dev);
 179         uint32_t size;
 180         u32 *fifo_mem;
 181         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 182         void *bounce;
 183         int ret;
 184         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 185         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 186
 187         if (unlikely(arg->pad64 != 0 || arg->max_size == 0)) {
 188                 DRM_ERROR("Illegal GET_3D_CAP argument.\n");
 189                 return -EINVAL;
 190         }
 191
 192         if (gb_objects && vmw_fp->gb_aware)
 193                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 194         else if (gb_objects)
 195                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 196         else
 197                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 198                         sizeof(uint32_t);
 199
 200         if (arg->max_size < size)
 201                 size = arg->max_size;
 202
 203         bounce = vzalloc(size);
 204         if (unlikely(bounce == NULL)) {
 205                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 206                 return -ENOMEM;
 207         }
 208
 209         if (gb_objects && vmw_fp->gb_aware) {
 210                 int i, num;
 211                 uint32_t *bounce32 = (uint32_t *) bounce;
 212
 213                 num = size / sizeof(uint32_t);
 214                 if (num > SVGA3D_DEVCAP_MAX)
 215                         num = SVGA3D_DEVCAP_MAX;
 216
 217                 spin_lock(&dev_priv->cap_lock);
 218                 for (i = 0; i < num; ++i) {
 219                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 220                         *bounce32++ = vmw_mask_multisample
 221                                 (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 222                 }
 223                 spin_unlock(&dev_priv->cap_lock);
 224         } else if (gb_objects) {
 225                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 226                 if (unlikely(ret != 0))
 227                         goto out_err;
 228         } else {
 229                 fifo_mem = dev_priv->mmio_virt;
 230                 memcpy(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 231         }
 232
 233         ret = copy_to_user(buffer, bounce, size);
 234         if (ret)
 235                 ret = -EFAULT;
 236 out_err:
 237         vfree(bounce);
 238
 239         if (unlikely(ret != 0))
 240                 DRM_ERROR("Failed to report 3D caps info.\n");
 241
 242         return ret;
 243 }
 244
 245 int vmw_present_ioctl(struct drm_device *dev, void *data,
 246                       struct drm_file *file_priv)
 247 {
 248         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 249         struct vmw_private *dev_priv = vmw_priv(dev);
 250         struct drm_vmw_present_arg *arg =
 251                 (struct drm_vmw_present_arg *)data;
 252         struct vmw_surface *surface;
 253         struct drm_vmw_rect __user *clips_ptr;
 254         struct drm_vmw_rect *clips = NULL;
 255         struct drm_framebuffer *fb;
 256         struct vmw_framebuffer *vfb;
 257         struct vmw_resource *res;
 258         uint32_t num_clips;
 259         int ret;
 260
 261         num_clips = arg->num_clips;
 262         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 263
 264         if (unlikely(num_clips == 0))
 265                 return 0;
 266
 267         if (clips_ptr == NULL) {
 268                 DRM_ERROR("Variable clips_ptr must be specified.\n");
 269                 ret = -EINVAL;
 270                 goto out_clips;
 271         }
 272
 273         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 274         if (clips == NULL) {
 275                 DRM_ERROR("Failed to allocate clip rect list.\n");
 276                 ret = -ENOMEM;
 277                 goto out_clips;
 278         }
 279
 280         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 281         if (ret) {
 282                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 283                 ret = -EFAULT;
 284                 goto out_no_copy;
 285         }
 286
 287         drm_modeset_lock_all(dev);
 288
 289         fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 290         if (!fb) {
 291                 DRM_ERROR("Invalid framebuffer id.\n");
 292                 ret = -ENOENT;
 293                 goto out_no_fb;
 294         }
 295         vfb = vmw_framebuffer_to_vfb(fb);
 296
 297         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 298         if (unlikely(ret != 0))
 299                 goto out_no_ttm_lock;
 300
 301         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 302                                               user_surface_converter,
 303                                               &res);
 304         if (ret)
 305                 goto out_no_surface;
 306
 307         surface = vmw_res_to_srf(res);
 308         ret = vmw_kms_present(dev_priv, file_priv,
 309                               vfb, surface, arg->sid,
 310                               arg->dest_x, arg->dest_y,
 311                               clips, num_clips);
 312
 313         /* vmw_user_surface_lookup takes one ref so does new_fb */
 314         vmw_surface_unreference(&surface);
 315
 316 out_no_surface:
 317         ttm_read_unlock(&dev_priv->reservation_sem);
 318 out_no_ttm_lock:
 319         drm_framebuffer_unreference(fb);
 320 out_no_fb:
 321         drm_modeset_unlock_all(dev);
 322 out_no_copy:
 323         kfree(clips);
 324 out_clips:
 325         return ret;
 326 }
 327
 328 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 329                                struct drm_file *file_priv)
 330 {
 331         struct vmw_private *dev_priv = vmw_priv(dev);
 332         struct drm_vmw_present_readback_arg *arg =
 333                 (struct drm_vmw_present_readback_arg *)data;
 334         struct drm_vmw_fence_rep __user *user_fence_rep =
 335                 (struct drm_vmw_fence_rep __user *)
 336                 (unsigned long)arg->fence_rep;
 337         struct drm_vmw_rect __user *clips_ptr;
 338         struct drm_vmw_rect *clips = NULL;
 339         struct drm_framebuffer *fb;
 340         struct vmw_framebuffer *vfb;
 341         uint32_t num_clips;
 342         int ret;
 343
 344         num_clips = arg->num_clips;
 345         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 346
 347         if (unlikely(num_clips == 0))
 348                 return 0;
 349
 350         if (clips_ptr == NULL) {
 351                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 352                 ret = -EINVAL;
 353                 goto out_clips;
 354         }
 355
 356         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 357         if (clips == NULL) {
 358                 DRM_ERROR("Failed to allocate clip rect list.\n");
 359                 ret = -ENOMEM;
 360                 goto out_clips;
 361         }
 362
 363         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 364         if (ret) {
 365                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 366                 ret = -EFAULT;
 367                 goto out_no_copy;
 368         }
 369
 370         drm_modeset_lock_all(dev);
 371
 372         fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 373         if (!fb) {
 374                 DRM_ERROR("Invalid framebuffer id.\n");
 375                 ret = -ENOENT;
 376                 goto out_no_fb;
 377         }
 378
 379         vfb = vmw_framebuffer_to_vfb(fb);
 380         if (!vfb->dmabuf) {
 381                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 382                 ret = -EINVAL;
 383                 goto out_no_ttm_lock;
 384         }
 385
 386         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 387         if (unlikely(ret != 0))
 388                 goto out_no_ttm_lock;
 389
 390         ret = vmw_kms_readback(dev_priv, file_priv,
 391                                vfb, user_fence_rep,
 392                                clips, num_clips);
 393
 394         ttm_read_unlock(&dev_priv->reservation_sem);
 395 out_no_ttm_lock:
 396         drm_framebuffer_unreference(fb);
 397 out_no_fb:
 398         drm_modeset_unlock_all(dev);
 399 out_no_copy:
 400         kfree(clips);
 401 out_clips:
 402         return ret;
 403 }
 404
 405
 406 /**
 407  * vmw_fops_poll - wrapper around the drm_poll function
 408  *
 409  * @filp: See the linux fops poll documentation.
 410  * @wait: See the linux fops poll documentation.
 411  *
 412  * Wrapper around the drm_poll function that makes sure the device is
 413  * processing the fifo if drm_poll decides to wait.
 414  */
 415 __poll_t vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 416 {
 417         struct drm_file *file_priv = filp->private_data;
 418         struct vmw_private *dev_priv =
 419                 vmw_priv(file_priv->minor->dev);
 420
 421         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 422         return drm_poll(filp, wait);
 423 }
 424
 425
 426 /**
 427  * vmw_fops_read - wrapper around the drm_read function
 428  *
 429  * @filp: See the linux fops read documentation.
 430  * @buffer: See the linux fops read documentation.
 431  * @count: See the linux fops read documentation.
 432  * offset: See the linux fops read documentation.
 433  *
 434  * Wrapper around the drm_read function that makes sure the device is
 435  * processing the fifo if drm_read decides to wait.
 436  */
 437 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 438                       size_t count, loff_t *offset)
 439 {
 440         struct drm_file *file_priv = filp->private_data;
 441         struct vmw_private *dev_priv =
 442                 vmw_priv(file_priv->minor->dev);
 443
 444         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 445         return drm_read(filp, buffer, count, offset);
 446 }