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_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_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                 u32 *fifo_mem = dev_priv->mmio_virt;
  71                 const struct vmw_fifo_state *fifo = &dev_priv->fifo;
  72
  73                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS)) {
  74                         param->value = SVGA3D_HWVERSION_WS8_B1;
  75                         break;
  76                 }
  77
  78                 param->value =
  79                         vmw_mmio_read(fifo_mem +
  80                                       ((fifo->capabilities &
  81                                         SVGA_FIFO_CAP_3D_HWVERSION_REVISED) ?
  82                                        SVGA_FIFO_3D_HWVERSION_REVISED :
  83                                        SVGA_FIFO_3D_HWVERSION));
  84                 break;
  85         }
  86         case DRM_VMW_PARAM_MAX_SURF_MEMORY:
  87                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  88                     !vmw_fp->gb_aware)
  89                         param->value = dev_priv->max_mob_pages * PAGE_SIZE / 2;
  90                 else
  91                         param->value = dev_priv->memory_size;
  92                 break;
  93         case DRM_VMW_PARAM_3D_CAPS_SIZE:
  94                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  95                     vmw_fp->gb_aware)
  96                         param->value = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
  97                 else if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS)
  98                         param->value = sizeof(struct svga_3d_compat_cap) +
  99                                 sizeof(uint32_t);
 100                 else
 101                         param->value = (SVGA_FIFO_3D_CAPS_LAST -
 102                                         SVGA_FIFO_3D_CAPS + 1) *
 103                                 sizeof(uint32_t);
 104                 break;
 105         case DRM_VMW_PARAM_MAX_MOB_MEMORY:
 106                 vmw_fp->gb_aware = true;
 107                 param->value = dev_priv->max_mob_pages * PAGE_SIZE;
 108                 break;
 109         case DRM_VMW_PARAM_MAX_MOB_SIZE:
 110                 param->value = dev_priv->max_mob_size;
 111                 break;
 112         case DRM_VMW_PARAM_SCREEN_TARGET:
 113                 param->value =
 114                         (dev_priv->active_display_unit == vmw_du_screen_target);
 115                 break;
 116         case DRM_VMW_PARAM_DX:
 117                 param->value = has_sm4_context(dev_priv);
 118                 break;
 119         case DRM_VMW_PARAM_SM4_1:
 120                 param->value = has_sm4_1_context(dev_priv);
 121                 break;
 122         case DRM_VMW_PARAM_SM5:
 123                 param->value = has_sm5_context(dev_priv);
 124                 break;
 125         default:
 126                 return -EINVAL;
 127         }
 128
 129         return 0;
 130 }
 131
 132 static u32 vmw_mask_legacy_multisample(unsigned int cap, u32 fmt_value)
 133 {
 134         /*
 135          * A version of user-space exists which use MULTISAMPLE_MASKABLESAMPLES
 136          * to check the sample count supported by virtual device. Since there
 137          * never was support for multisample count for backing MOB return 0.
 138          *
 139          * MULTISAMPLE_MASKABLESAMPLES devcap is marked as deprecated by virtual
 140          * device.
 141          */
 142         if (cap == SVGA3D_DEVCAP_DEAD5)
 143                 return 0;
 144
 145         return fmt_value;
 146 }
 147
 148 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 149                                size_t size)
 150 {
 151         struct svga_3d_compat_cap *compat_cap =
 152                 (struct svga_3d_compat_cap *) bounce;
 153         unsigned int i;
 154         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 155         unsigned int max_size;
 156
 157         if (size < pair_offset)
 158                 return -EINVAL;
 159
 160         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 161
 162         if (max_size > SVGA3D_DEVCAP_MAX)
 163                 max_size = SVGA3D_DEVCAP_MAX;
 164
 165         compat_cap->header.length =
 166                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 167         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 168
 169         spin_lock(&dev_priv->cap_lock);
 170         for (i = 0; i < max_size; ++i) {
 171                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 172                 compat_cap->pairs[i][0] = i;
 173                 compat_cap->pairs[i][1] = vmw_mask_legacy_multisample
 174                         (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 175         }
 176         spin_unlock(&dev_priv->cap_lock);
 177
 178         return 0;
 179 }
 180
 181
 182 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 183                          struct drm_file *file_priv)
 184 {
 185         struct drm_vmw_get_3d_cap_arg *arg =
 186                 (struct drm_vmw_get_3d_cap_arg *) data;
 187         struct vmw_private *dev_priv = vmw_priv(dev);
 188         uint32_t size;
 189         u32 *fifo_mem;
 190         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 191         void *bounce;
 192         int ret;
 193         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 194         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 195
 196         if (unlikely(arg->pad64 != 0 || arg->max_size == 0)) {
 197                 VMW_DEBUG_USER("Illegal GET_3D_CAP argument.\n");
 198                 return -EINVAL;
 199         }
 200
 201         if (gb_objects && vmw_fp->gb_aware)
 202                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 203         else if (gb_objects)
 204                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 205         else
 206                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 207                         sizeof(uint32_t);
 208
 209         if (arg->max_size < size)
 210                 size = arg->max_size;
 211
 212         bounce = vzalloc(size);
 213         if (unlikely(bounce == NULL)) {
 214                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 215                 return -ENOMEM;
 216         }
 217
 218         if (gb_objects && vmw_fp->gb_aware) {
 219                 int i, num;
 220                 uint32_t *bounce32 = (uint32_t *) bounce;
 221
 222                 num = size / sizeof(uint32_t);
 223                 if (num > SVGA3D_DEVCAP_MAX)
 224                         num = SVGA3D_DEVCAP_MAX;
 225
 226                 spin_lock(&dev_priv->cap_lock);
 227                 for (i = 0; i < num; ++i) {
 228                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 229                         *bounce32++ = vmw_mask_legacy_multisample
 230                                 (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 231                 }
 232                 spin_unlock(&dev_priv->cap_lock);
 233         } else if (gb_objects) {
 234                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 235                 if (unlikely(ret != 0))
 236                         goto out_err;
 237         } else {
 238                 fifo_mem = dev_priv->mmio_virt;
 239                 memcpy(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 240         }
 241
 242         ret = copy_to_user(buffer, bounce, size);
 243         if (ret)
 244                 ret = -EFAULT;
 245 out_err:
 246         vfree(bounce);
 247
 248         if (unlikely(ret != 0))
 249                 DRM_ERROR("Failed to report 3D caps info.\n");
 250
 251         return ret;
 252 }
 253
 254 int vmw_present_ioctl(struct drm_device *dev, void *data,
 255                       struct drm_file *file_priv)
 256 {
 257         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 258         struct vmw_private *dev_priv = vmw_priv(dev);
 259         struct drm_vmw_present_arg *arg =
 260                 (struct drm_vmw_present_arg *)data;
 261         struct vmw_surface *surface;
 262         struct drm_vmw_rect __user *clips_ptr;
 263         struct drm_vmw_rect *clips = NULL;
 264         struct drm_framebuffer *fb;
 265         struct vmw_framebuffer *vfb;
 266         struct vmw_resource *res;
 267         uint32_t num_clips;
 268         int ret;
 269
 270         num_clips = arg->num_clips;
 271         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 272
 273         if (unlikely(num_clips == 0))
 274                 return 0;
 275
 276         if (clips_ptr == NULL) {
 277                 VMW_DEBUG_USER("Variable clips_ptr must be specified.\n");
 278                 ret = -EINVAL;
 279                 goto out_clips;
 280         }
 281
 282         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 283         if (clips == NULL) {
 284                 DRM_ERROR("Failed to allocate clip rect list.\n");
 285                 ret = -ENOMEM;
 286                 goto out_clips;
 287         }
 288
 289         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 290         if (ret) {
 291                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 292                 ret = -EFAULT;
 293                 goto out_no_copy;
 294         }
 295
 296         drm_modeset_lock_all(dev);
 297
 298         fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 299         if (!fb) {
 300                 VMW_DEBUG_USER("Invalid framebuffer id.\n");
 301                 ret = -ENOENT;
 302                 goto out_no_fb;
 303         }
 304         vfb = vmw_framebuffer_to_vfb(fb);
 305
 306         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 307         if (unlikely(ret != 0))
 308                 goto out_no_ttm_lock;
 309
 310         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 311                                               user_surface_converter,
 312                                               &res);
 313         if (ret)
 314                 goto out_no_surface;
 315
 316         surface = vmw_res_to_srf(res);
 317         ret = vmw_kms_present(dev_priv, file_priv,
 318                               vfb, surface, arg->sid,
 319                               arg->dest_x, arg->dest_y,
 320                               clips, num_clips);
 321
 322         /* vmw_user_surface_lookup takes one ref so does new_fb */
 323         vmw_surface_unreference(&surface);
 324
 325 out_no_surface:
 326         ttm_read_unlock(&dev_priv->reservation_sem);
 327 out_no_ttm_lock:
 328         drm_framebuffer_put(fb);
 329 out_no_fb:
 330         drm_modeset_unlock_all(dev);
 331 out_no_copy:
 332         kfree(clips);
 333 out_clips:
 334         return ret;
 335 }
 336
 337 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 338                                struct drm_file *file_priv)
 339 {
 340         struct vmw_private *dev_priv = vmw_priv(dev);
 341         struct drm_vmw_present_readback_arg *arg =
 342                 (struct drm_vmw_present_readback_arg *)data;
 343         struct drm_vmw_fence_rep __user *user_fence_rep =
 344                 (struct drm_vmw_fence_rep __user *)
 345                 (unsigned long)arg->fence_rep;
 346         struct drm_vmw_rect __user *clips_ptr;
 347         struct drm_vmw_rect *clips = NULL;
 348         struct drm_framebuffer *fb;
 349         struct vmw_framebuffer *vfb;
 350         uint32_t num_clips;
 351         int ret;
 352
 353         num_clips = arg->num_clips;
 354         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 355
 356         if (unlikely(num_clips == 0))
 357                 return 0;
 358
 359         if (clips_ptr == NULL) {
 360                 VMW_DEBUG_USER("Argument clips_ptr must be specified.\n");
 361                 ret = -EINVAL;
 362                 goto out_clips;
 363         }
 364
 365         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 366         if (clips == NULL) {
 367                 DRM_ERROR("Failed to allocate clip rect list.\n");
 368                 ret = -ENOMEM;
 369                 goto out_clips;
 370         }
 371
 372         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 373         if (ret) {
 374                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 375                 ret = -EFAULT;
 376                 goto out_no_copy;
 377         }
 378
 379         drm_modeset_lock_all(dev);
 380
 381         fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 382         if (!fb) {
 383                 VMW_DEBUG_USER("Invalid framebuffer id.\n");
 384                 ret = -ENOENT;
 385                 goto out_no_fb;
 386         }
 387
 388         vfb = vmw_framebuffer_to_vfb(fb);
 389         if (!vfb->bo) {
 390                 VMW_DEBUG_USER("Framebuffer not buffer backed.\n");
 391                 ret = -EINVAL;
 392                 goto out_no_ttm_lock;
 393         }
 394
 395         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 396         if (unlikely(ret != 0))
 397                 goto out_no_ttm_lock;
 398
 399         ret = vmw_kms_readback(dev_priv, file_priv,
 400                                vfb, user_fence_rep,
 401                                clips, num_clips);
 402
 403         ttm_read_unlock(&dev_priv->reservation_sem);
 404 out_no_ttm_lock:
 405         drm_framebuffer_put(fb);
 406 out_no_fb:
 407         drm_modeset_unlock_all(dev);
 408 out_no_copy:
 409         kfree(clips);
 410 out_clips:
 411         return ret;
 412 }
 413
 414
 415 /**
 416  * vmw_fops_poll - wrapper around the drm_poll function
 417  *
 418  * @filp: See the linux fops poll documentation.
 419  * @wait: See the linux fops poll documentation.
 420  *
 421  * Wrapper around the drm_poll function that makes sure the device is
 422  * processing the fifo if drm_poll decides to wait.
 423  */
 424 __poll_t vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 425 {
 426         struct drm_file *file_priv = filp->private_data;
 427         struct vmw_private *dev_priv =
 428                 vmw_priv(file_priv->minor->dev);
 429
 430         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 431         return drm_poll(filp, wait);
 432 }
 433
 434
 435 /**
 436  * vmw_fops_read - wrapper around the drm_read function
 437  *
 438  * @filp: See the linux fops read documentation.
 439  * @buffer: See the linux fops read documentation.
 440  * @count: See the linux fops read documentation.
 441  * offset: See the linux fops read documentation.
 442  *
 443  * Wrapper around the drm_read function that makes sure the device is
 444  * processing the fifo if drm_read decides to wait.
 445  */
 446 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 447                       size_t count, loff_t *offset)
 448 {
 449         struct drm_file *file_priv = filp->private_data;
 450         struct vmw_private *dev_priv =
 451                 vmw_priv(file_priv->minor->dev);
 452
 453         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 454         return drm_read(filp, buffer, count, offset);
 455 }