drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c

   1 // SPDX-License-Identifier: GPL-2.0 OR MIT
   2 /**************************************************************************
   3  *
   4  * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
   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_supports_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_HW_CAPS2:
  60                 param->value = dev_priv->capabilities2;
  61                 break;
  62         case DRM_VMW_PARAM_FIFO_CAPS:
  63                 param->value = dev_priv->fifo.capabilities;
  64                 break;
  65         case DRM_VMW_PARAM_MAX_FB_SIZE:
  66                 param->value = dev_priv->prim_bb_mem;
  67                 break;
  68         case DRM_VMW_PARAM_FIFO_HW_VERSION:
  69         {
  70                 const struct vmw_fifo_state *fifo = &dev_priv->fifo;
  71
  72                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS)) {
  73                         param->value = SVGA3D_HWVERSION_WS8_B1;
  74                         break;
  75                 }
  76
  77                 param->value =
  78                         vmw_fifo_mem_read(dev_priv,
  79                                           ((fifo->capabilities &
  80                                             SVGA_FIFO_CAP_3D_HWVERSION_REVISED) ?
  81                                                    SVGA_FIFO_3D_HWVERSION_REVISED :
  82                                                    SVGA_FIFO_3D_HWVERSION));
  83                 break;
  84         }
  85         case DRM_VMW_PARAM_MAX_SURF_MEMORY:
  86                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  87                     !vmw_fp->gb_aware)
  88                         param->value = dev_priv->max_mob_pages * PAGE_SIZE / 2;
  89                 else
  90                         param->value = dev_priv->memory_size;
  91                 break;
  92         case DRM_VMW_PARAM_3D_CAPS_SIZE:
  93                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  94                     vmw_fp->gb_aware)
  95                         param->value = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
  96                 else if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS)
  97                         param->value = sizeof(struct svga_3d_compat_cap) +
  98                                 sizeof(uint32_t);
  99                 else
 100                         param->value = (SVGA_FIFO_3D_CAPS_LAST -
 101                                         SVGA_FIFO_3D_CAPS + 1) *
 102                                 sizeof(uint32_t);
 103                 break;
 104         case DRM_VMW_PARAM_MAX_MOB_MEMORY:
 105                 vmw_fp->gb_aware = true;
 106                 param->value = dev_priv->max_mob_pages * PAGE_SIZE;
 107                 break;
 108         case DRM_VMW_PARAM_MAX_MOB_SIZE:
 109                 param->value = dev_priv->max_mob_size;
 110                 break;
 111         case DRM_VMW_PARAM_SCREEN_TARGET:
 112                 param->value =
 113                         (dev_priv->active_display_unit == vmw_du_screen_target);
 114                 break;
 115         case DRM_VMW_PARAM_DX:
 116                 param->value = has_sm4_context(dev_priv);
 117                 break;
 118         case DRM_VMW_PARAM_SM4_1:
 119                 param->value = has_sm4_1_context(dev_priv);
 120                 break;
 121         case DRM_VMW_PARAM_SM5:
 122                 param->value = has_sm5_context(dev_priv);
 123                 break;
 124         default:
 125                 return -EINVAL;
 126         }
 127
 128         return 0;
 129 }
 130
 131 static u32 vmw_mask_legacy_multisample(unsigned int cap, u32 fmt_value)
 132 {
 133         /*
 134          * A version of user-space exists which use MULTISAMPLE_MASKABLESAMPLES
 135          * to check the sample count supported by virtual device. Since there
 136          * never was support for multisample count for backing MOB return 0.
 137          *
 138          * MULTISAMPLE_MASKABLESAMPLES devcap is marked as deprecated by virtual
 139          * device.
 140          */
 141         if (cap == SVGA3D_DEVCAP_DEAD5)
 142                 return 0;
 143
 144         return fmt_value;
 145 }
 146
 147 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 148                                size_t size)
 149 {
 150         struct svga_3d_compat_cap *compat_cap =
 151                 (struct svga_3d_compat_cap *) bounce;
 152         unsigned int i;
 153         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 154         unsigned int max_size;
 155
 156         if (size < pair_offset)
 157                 return -EINVAL;
 158
 159         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 160
 161         if (max_size > SVGA3D_DEVCAP_MAX)
 162                 max_size = SVGA3D_DEVCAP_MAX;
 163
 164         compat_cap->header.length =
 165                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 166         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 167
 168         spin_lock(&dev_priv->cap_lock);
 169         for (i = 0; i < max_size; ++i) {
 170                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 171                 compat_cap->pairs[i][0] = i;
 172                 compat_cap->pairs[i][1] = vmw_mask_legacy_multisample
 173                         (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 174         }
 175         spin_unlock(&dev_priv->cap_lock);
 176
 177         return 0;
 178 }
 179
 180
 181 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 182                          struct drm_file *file_priv)
 183 {
 184         struct drm_vmw_get_3d_cap_arg *arg =
 185                 (struct drm_vmw_get_3d_cap_arg *) data;
 186         struct vmw_private *dev_priv = vmw_priv(dev);
 187         uint32_t size;
 188         u32 *fifo_mem;
 189         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 190         void *bounce;
 191         int ret;
 192         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 193         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 194
 195         if (unlikely(arg->pad64 != 0 || arg->max_size == 0)) {
 196                 VMW_DEBUG_USER("Illegal GET_3D_CAP argument.\n");
 197                 return -EINVAL;
 198         }
 199
 200         if (gb_objects && vmw_fp->gb_aware)
 201                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 202         else if (gb_objects)
 203                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 204         else
 205                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 206                         sizeof(uint32_t);
 207
 208         if (arg->max_size < size)
 209                 size = arg->max_size;
 210
 211         bounce = vzalloc(size);
 212         if (unlikely(bounce == NULL)) {
 213                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 214                 return -ENOMEM;
 215         }
 216
 217         if (gb_objects && vmw_fp->gb_aware) {
 218                 int i, num;
 219                 uint32_t *bounce32 = (uint32_t *) bounce;
 220
 221                 num = size / sizeof(uint32_t);
 222                 if (num > SVGA3D_DEVCAP_MAX)
 223                         num = SVGA3D_DEVCAP_MAX;
 224
 225                 spin_lock(&dev_priv->cap_lock);
 226                 for (i = 0; i < num; ++i) {
 227                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 228                         *bounce32++ = vmw_mask_legacy_multisample
 229                                 (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 230                 }
 231                 spin_unlock(&dev_priv->cap_lock);
 232         } else if (gb_objects) {
 233                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 234                 if (unlikely(ret != 0))
 235                         goto out_err;
 236         } else {
 237                 fifo_mem = dev_priv->fifo_mem;
 238                 memcpy(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 239         }
 240
 241         ret = copy_to_user(buffer, bounce, size);
 242         if (ret)
 243                 ret = -EFAULT;
 244 out_err:
 245         vfree(bounce);
 246
 247         if (unlikely(ret != 0))
 248                 DRM_ERROR("Failed to report 3D caps info.\n");
 249
 250         return ret;
 251 }
 252
 253 int vmw_present_ioctl(struct drm_device *dev, void *data,
 254                       struct drm_file *file_priv)
 255 {
 256         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 257         struct vmw_private *dev_priv = vmw_priv(dev);
 258         struct drm_vmw_present_arg *arg =
 259                 (struct drm_vmw_present_arg *)data;
 260         struct vmw_surface *surface;
 261         struct drm_vmw_rect __user *clips_ptr;
 262         struct drm_vmw_rect *clips = NULL;
 263         struct drm_framebuffer *fb;
 264         struct vmw_framebuffer *vfb;
 265         struct vmw_resource *res;
 266         uint32_t num_clips;
 267         int ret;
 268
 269         num_clips = arg->num_clips;
 270         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 271
 272         if (unlikely(num_clips == 0))
 273                 return 0;
 274
 275         if (clips_ptr == NULL) {
 276                 VMW_DEBUG_USER("Variable clips_ptr must be specified.\n");
 277                 ret = -EINVAL;
 278                 goto out_clips;
 279         }
 280
 281         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 282         if (clips == NULL) {
 283                 DRM_ERROR("Failed to allocate clip rect list.\n");
 284                 ret = -ENOMEM;
 285                 goto out_clips;
 286         }
 287
 288         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 289         if (ret) {
 290                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 291                 ret = -EFAULT;
 292                 goto out_no_copy;
 293         }
 294
 295         drm_modeset_lock_all(dev);
 296
 297         fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 298         if (!fb) {
 299                 VMW_DEBUG_USER("Invalid framebuffer id.\n");
 300                 ret = -ENOENT;
 301                 goto out_no_fb;
 302         }
 303         vfb = vmw_framebuffer_to_vfb(fb);
 304
 305         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 306         if (unlikely(ret != 0))
 307                 goto out_no_ttm_lock;
 308
 309         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 310                                               user_surface_converter,
 311                                               &res);
 312         if (ret)
 313                 goto out_no_surface;
 314
 315         surface = vmw_res_to_srf(res);
 316         ret = vmw_kms_present(dev_priv, file_priv,
 317                               vfb, surface, arg->sid,
 318                               arg->dest_x, arg->dest_y,
 319                               clips, num_clips);
 320
 321         /* vmw_user_surface_lookup takes one ref so does new_fb */
 322         vmw_surface_unreference(&surface);
 323
 324 out_no_surface:
 325         ttm_read_unlock(&dev_priv->reservation_sem);
 326 out_no_ttm_lock:
 327         drm_framebuffer_put(fb);
 328 out_no_fb:
 329         drm_modeset_unlock_all(dev);
 330 out_no_copy:
 331         kfree(clips);
 332 out_clips:
 333         return ret;
 334 }
 335
 336 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 337                                struct drm_file *file_priv)
 338 {
 339         struct vmw_private *dev_priv = vmw_priv(dev);
 340         struct drm_vmw_present_readback_arg *arg =
 341                 (struct drm_vmw_present_readback_arg *)data;
 342         struct drm_vmw_fence_rep __user *user_fence_rep =
 343                 (struct drm_vmw_fence_rep __user *)
 344                 (unsigned long)arg->fence_rep;
 345         struct drm_vmw_rect __user *clips_ptr;
 346         struct drm_vmw_rect *clips = NULL;
 347         struct drm_framebuffer *fb;
 348         struct vmw_framebuffer *vfb;
 349         uint32_t num_clips;
 350         int ret;
 351
 352         num_clips = arg->num_clips;
 353         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 354
 355         if (unlikely(num_clips == 0))
 356                 return 0;
 357
 358         if (clips_ptr == NULL) {
 359                 VMW_DEBUG_USER("Argument clips_ptr must be specified.\n");
 360                 ret = -EINVAL;
 361                 goto out_clips;
 362         }
 363
 364         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 365         if (clips == NULL) {
 366                 DRM_ERROR("Failed to allocate clip rect list.\n");
 367                 ret = -ENOMEM;
 368                 goto out_clips;
 369         }
 370
 371         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 372         if (ret) {
 373                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 374                 ret = -EFAULT;
 375                 goto out_no_copy;
 376         }
 377
 378         drm_modeset_lock_all(dev);
 379
 380         fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 381         if (!fb) {
 382                 VMW_DEBUG_USER("Invalid framebuffer id.\n");
 383                 ret = -ENOENT;
 384                 goto out_no_fb;
 385         }
 386
 387         vfb = vmw_framebuffer_to_vfb(fb);
 388         if (!vfb->bo) {
 389                 VMW_DEBUG_USER("Framebuffer not buffer backed.\n");
 390                 ret = -EINVAL;
 391                 goto out_no_ttm_lock;
 392         }
 393
 394         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 395         if (unlikely(ret != 0))
 396                 goto out_no_ttm_lock;
 397
 398         ret = vmw_kms_readback(dev_priv, file_priv,
 399                                vfb, user_fence_rep,
 400                                clips, num_clips);
 401
 402         ttm_read_unlock(&dev_priv->reservation_sem);
 403 out_no_ttm_lock:
 404         drm_framebuffer_put(fb);
 405 out_no_fb:
 406         drm_modeset_unlock_all(dev);
 407 out_no_copy:
 408         kfree(clips);
 409 out_clips:
 410         return ret;
 411 }
 412
 413
 414 /**
 415  * vmw_fops_poll - wrapper around the drm_poll function
 416  *
 417  * @filp: See the linux fops poll documentation.
 418  * @wait: See the linux fops poll documentation.
 419  *
 420  * Wrapper around the drm_poll function that makes sure the device is
 421  * processing the fifo if drm_poll decides to wait.
 422  */
 423 __poll_t vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 424 {
 425         struct drm_file *file_priv = filp->private_data;
 426         struct vmw_private *dev_priv =
 427                 vmw_priv(file_priv->minor->dev);
 428
 429         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 430         return drm_poll(filp, wait);
 431 }
 432
 433
 434 /**
 435  * vmw_fops_read - wrapper around the drm_read function
 436  *
 437  * @filp: See the linux fops read documentation.
 438  * @buffer: See the linux fops read documentation.
 439  * @count: See the linux fops read documentation.
 440  * @offset: See the linux fops read documentation.
 441  *
 442  * Wrapper around the drm_read function that makes sure the device is
 443  * processing the fifo if drm_read decides to wait.
 444  */
 445 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 446                       size_t count, loff_t *offset)
 447 {
 448         struct drm_file *file_priv = filp->private_data;
 449         struct vmw_private *dev_priv =
 450                 vmw_priv(file_priv->minor->dev);
 451
 452         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 453         return drm_read(filp, buffer, count, offset);
 454 }