kernel/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                 DRM_ERROR("Illegal vmwgfx get param request: %d\n",
 118                           param->param);
 119                 return -EINVAL;
 120         }
 121
 122         return 0;
 123 }
 124
 125 static u32 vmw_mask_multisample(unsigned int cap, u32 fmt_value)
 126 {
 127         /* If the header is updated, update the format test as well! */
 128         BUILD_BUG_ON(SVGA3D_DEVCAP_DXFMT_BC5_UNORM + 1 != SVGA3D_DEVCAP_MAX);
 129
 130         if (cap >= SVGA3D_DEVCAP_DXFMT_X8R8G8B8 &&
 131             cap <= SVGA3D_DEVCAP_DXFMT_BC5_UNORM)
 132                 fmt_value &= ~(SVGADX_DXFMT_MULTISAMPLE_2 |
 133                                SVGADX_DXFMT_MULTISAMPLE_4 |
 134                                SVGADX_DXFMT_MULTISAMPLE_8);
 135         else if (cap == SVGA3D_DEVCAP_MULTISAMPLE_MASKABLESAMPLES)
 136                 return 0;
 137
 138         return fmt_value;
 139 }
 140
 141 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 142                                size_t size)
 143 {
 144         struct svga_3d_compat_cap *compat_cap =
 145                 (struct svga_3d_compat_cap *) bounce;
 146         unsigned int i;
 147         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 148         unsigned int max_size;
 149
 150         if (size < pair_offset)
 151                 return -EINVAL;
 152
 153         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 154
 155         if (max_size > SVGA3D_DEVCAP_MAX)
 156                 max_size = SVGA3D_DEVCAP_MAX;
 157
 158         compat_cap->header.length =
 159                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 160         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 161
 162         spin_lock(&dev_priv->cap_lock);
 163         for (i = 0; i < max_size; ++i) {
 164                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 165                 compat_cap->pairs[i][0] = i;
 166                 compat_cap->pairs[i][1] = vmw_mask_multisample
 167                         (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 168         }
 169         spin_unlock(&dev_priv->cap_lock);
 170
 171         return 0;
 172 }
 173
 174
 175 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 176                          struct drm_file *file_priv)
 177 {
 178         struct drm_vmw_get_3d_cap_arg *arg =
 179                 (struct drm_vmw_get_3d_cap_arg *) data;
 180         struct vmw_private *dev_priv = vmw_priv(dev);
 181         uint32_t size;
 182         u32 *fifo_mem;
 183         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 184         void *bounce;
 185         int ret;
 186         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 187         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 188
 189         if (unlikely(arg->pad64 != 0)) {
 190                 DRM_ERROR("Illegal GET_3D_CAP argument.\n");
 191                 return -EINVAL;
 192         }
 193
 194         if (gb_objects && vmw_fp->gb_aware)
 195                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 196         else if (gb_objects)
 197                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 198         else
 199                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 200                         sizeof(uint32_t);
 201
 202         if (arg->max_size < size)
 203                 size = arg->max_size;
 204
 205         bounce = vzalloc(size);
 206         if (unlikely(bounce == NULL)) {
 207                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 208                 return -ENOMEM;
 209         }
 210
 211         if (gb_objects && vmw_fp->gb_aware) {
 212                 int i, num;
 213                 uint32_t *bounce32 = (uint32_t *) bounce;
 214
 215                 num = size / sizeof(uint32_t);
 216                 if (num > SVGA3D_DEVCAP_MAX)
 217                         num = SVGA3D_DEVCAP_MAX;
 218
 219                 spin_lock(&dev_priv->cap_lock);
 220                 for (i = 0; i < num; ++i) {
 221                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 222                         *bounce32++ = vmw_mask_multisample
 223                                 (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 224                 }
 225                 spin_unlock(&dev_priv->cap_lock);
 226         } else if (gb_objects) {
 227                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 228                 if (unlikely(ret != 0))
 229                         goto out_err;
 230         } else {
 231                 fifo_mem = dev_priv->mmio_virt;
 232                 memcpy(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 233         }
 234
 235         ret = copy_to_user(buffer, bounce, size);
 236         if (ret)
 237                 ret = -EFAULT;
 238 out_err:
 239         vfree(bounce);
 240
 241         if (unlikely(ret != 0))
 242                 DRM_ERROR("Failed to report 3D caps info.\n");
 243
 244         return ret;
 245 }
 246
 247 int vmw_present_ioctl(struct drm_device *dev, void *data,
 248                       struct drm_file *file_priv)
 249 {
 250         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 251         struct vmw_private *dev_priv = vmw_priv(dev);
 252         struct drm_vmw_present_arg *arg =
 253                 (struct drm_vmw_present_arg *)data;
 254         struct vmw_surface *surface;
 255         struct drm_vmw_rect __user *clips_ptr;
 256         struct drm_vmw_rect *clips = NULL;
 257         struct drm_framebuffer *fb;
 258         struct vmw_framebuffer *vfb;
 259         struct vmw_resource *res;
 260         uint32_t num_clips;
 261         int ret;
 262
 263         num_clips = arg->num_clips;
 264         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 265
 266         if (unlikely(num_clips == 0))
 267                 return 0;
 268
 269         if (clips_ptr == NULL) {
 270                 DRM_ERROR("Variable clips_ptr must be specified.\n");
 271                 ret = -EINVAL;
 272                 goto out_clips;
 273         }
 274
 275         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 276         if (clips == NULL) {
 277                 DRM_ERROR("Failed to allocate clip rect list.\n");
 278                 ret = -ENOMEM;
 279                 goto out_clips;
 280         }
 281
 282         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 283         if (ret) {
 284                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 285                 ret = -EFAULT;
 286                 goto out_no_copy;
 287         }
 288
 289         drm_modeset_lock_all(dev);
 290
 291         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 292         if (!fb) {
 293                 DRM_ERROR("Invalid framebuffer id.\n");
 294                 ret = -ENOENT;
 295                 goto out_no_fb;
 296         }
 297         vfb = vmw_framebuffer_to_vfb(fb);
 298
 299         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 300         if (unlikely(ret != 0))
 301                 goto out_no_ttm_lock;
 302
 303         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 304                                               user_surface_converter,
 305                                               &res);
 306         if (ret)
 307                 goto out_no_surface;
 308
 309         surface = vmw_res_to_srf(res);
 310         ret = vmw_kms_present(dev_priv, file_priv,
 311                               vfb, surface, arg->sid,
 312                               arg->dest_x, arg->dest_y,
 313                               clips, num_clips);
 314
 315         /* vmw_user_surface_lookup takes one ref so does new_fb */
 316         vmw_surface_unreference(&surface);
 317
 318 out_no_surface:
 319         ttm_read_unlock(&dev_priv->reservation_sem);
 320 out_no_ttm_lock:
 321         drm_framebuffer_unreference(fb);
 322 out_no_fb:
 323         drm_modeset_unlock_all(dev);
 324 out_no_copy:
 325         kfree(clips);
 326 out_clips:
 327         return ret;
 328 }
 329
 330 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 331                                struct drm_file *file_priv)
 332 {
 333         struct vmw_private *dev_priv = vmw_priv(dev);
 334         struct drm_vmw_present_readback_arg *arg =
 335                 (struct drm_vmw_present_readback_arg *)data;
 336         struct drm_vmw_fence_rep __user *user_fence_rep =
 337                 (struct drm_vmw_fence_rep __user *)
 338                 (unsigned long)arg->fence_rep;
 339         struct drm_vmw_rect __user *clips_ptr;
 340         struct drm_vmw_rect *clips = NULL;
 341         struct drm_framebuffer *fb;
 342         struct vmw_framebuffer *vfb;
 343         uint32_t num_clips;
 344         int ret;
 345
 346         num_clips = arg->num_clips;
 347         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 348
 349         if (unlikely(num_clips == 0))
 350                 return 0;
 351
 352         if (clips_ptr == NULL) {
 353                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 354                 ret = -EINVAL;
 355                 goto out_clips;
 356         }
 357
 358         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 359         if (clips == NULL) {
 360                 DRM_ERROR("Failed to allocate clip rect list.\n");
 361                 ret = -ENOMEM;
 362                 goto out_clips;
 363         }
 364
 365         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 366         if (ret) {
 367                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 368                 ret = -EFAULT;
 369                 goto out_no_copy;
 370         }
 371
 372         drm_modeset_lock_all(dev);
 373
 374         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 375         if (!fb) {
 376                 DRM_ERROR("Invalid framebuffer id.\n");
 377                 ret = -ENOENT;
 378                 goto out_no_fb;
 379         }
 380
 381         vfb = vmw_framebuffer_to_vfb(fb);
 382         if (!vfb->dmabuf) {
 383                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 384                 ret = -EINVAL;
 385                 goto out_no_ttm_lock;
 386         }
 387
 388         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 389         if (unlikely(ret != 0))
 390                 goto out_no_ttm_lock;
 391
 392         ret = vmw_kms_readback(dev_priv, file_priv,
 393                                vfb, user_fence_rep,
 394                                clips, num_clips);
 395
 396         ttm_read_unlock(&dev_priv->reservation_sem);
 397 out_no_ttm_lock:
 398         drm_framebuffer_unreference(fb);
 399 out_no_fb:
 400         drm_modeset_unlock_all(dev);
 401 out_no_copy:
 402         kfree(clips);
 403 out_clips:
 404         return ret;
 405 }
 406
 407
 408 /**
 409  * vmw_fops_poll - wrapper around the drm_poll function
 410  *
 411  * @filp: See the linux fops poll documentation.
 412  * @wait: See the linux fops poll documentation.
 413  *
 414  * Wrapper around the drm_poll function that makes sure the device is
 415  * processing the fifo if drm_poll decides to wait.
 416  */
 417 unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 418 {
 419         struct drm_file *file_priv = filp->private_data;
 420         struct vmw_private *dev_priv =
 421                 vmw_priv(file_priv->minor->dev);
 422
 423         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 424         return drm_poll(filp, wait);
 425 }
 426
 427
 428 /**
 429  * vmw_fops_read - wrapper around the drm_read function
 430  *
 431  * @filp: See the linux fops read documentation.
 432  * @buffer: See the linux fops read documentation.
 433  * @count: See the linux fops read documentation.
 434  * offset: See the linux fops read documentation.
 435  *
 436  * Wrapper around the drm_read function that makes sure the device is
 437  * processing the fifo if drm_read decides to wait.
 438  */
 439 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 440                       size_t count, loff_t *offset)
 441 {
 442         struct drm_file *file_priv = filp->private_data;
 443         struct vmw_private *dev_priv =
 444                 vmw_priv(file_priv->minor->dev);
 445
 446         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 447         return drm_read(filp, buffer, count, offset);
 448 }