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 = vmw_fifo_caps(dev_priv);
  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                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS)) {
  71                         param->value = SVGA3D_HWVERSION_WS8_B1;
  72                         break;
  73                 }
  74
  75                 param->value =
  76                         vmw_fifo_mem_read(dev_priv,
  77                                           ((vmw_fifo_caps(dev_priv) &
  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 = has_sm4_context(dev_priv);
 115                 break;
 116         case DRM_VMW_PARAM_SM4_1:
 117                 param->value = has_sm4_1_context(dev_priv);
 118                 break;
 119         case DRM_VMW_PARAM_SM5:
 120                 param->value = has_sm5_context(dev_priv);
 121                 break;
 122         default:
 123                 return -EINVAL;
 124         }
 125
 126         return 0;
 127 }
 128
 129 static u32 vmw_mask_legacy_multisample(unsigned int cap, u32 fmt_value)
 130 {
 131         /*
 132          * A version of user-space exists which use MULTISAMPLE_MASKABLESAMPLES
 133          * to check the sample count supported by virtual device. Since there
 134          * never was support for multisample count for backing MOB return 0.
 135          *
 136          * MULTISAMPLE_MASKABLESAMPLES devcap is marked as deprecated by virtual
 137          * device.
 138          */
 139         if (cap == SVGA3D_DEVCAP_DEAD5)
 140                 return 0;
 141
 142         return fmt_value;
 143 }
 144
 145 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 146                                size_t size)
 147 {
 148         struct svga_3d_compat_cap *compat_cap =
 149                 (struct svga_3d_compat_cap *) bounce;
 150         unsigned int i;
 151         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 152         unsigned int max_size;
 153
 154         if (size < pair_offset)
 155                 return -EINVAL;
 156
 157         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 158
 159         if (max_size > SVGA3D_DEVCAP_MAX)
 160                 max_size = SVGA3D_DEVCAP_MAX;
 161
 162         compat_cap->header.length =
 163                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 164         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 165
 166         spin_lock(&dev_priv->cap_lock);
 167         for (i = 0; i < max_size; ++i) {
 168                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 169                 compat_cap->pairs[i][0] = i;
 170                 compat_cap->pairs[i][1] = vmw_mask_legacy_multisample
 171                         (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 172         }
 173         spin_unlock(&dev_priv->cap_lock);
 174
 175         return 0;
 176 }
 177
 178
 179 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 180                          struct drm_file *file_priv)
 181 {
 182         struct drm_vmw_get_3d_cap_arg *arg =
 183                 (struct drm_vmw_get_3d_cap_arg *) data;
 184         struct vmw_private *dev_priv = vmw_priv(dev);
 185         uint32_t size;
 186         u32 *fifo_mem;
 187         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 188         void *bounce;
 189         int ret;
 190         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 191         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 192
 193         if (unlikely(arg->pad64 != 0 || arg->max_size == 0)) {
 194                 VMW_DEBUG_USER("Illegal GET_3D_CAP argument.\n");
 195                 return -EINVAL;
 196         }
 197
 198         if (gb_objects && vmw_fp->gb_aware)
 199                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 200         else if (gb_objects)
 201                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 202         else
 203                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 204                         sizeof(uint32_t);
 205
 206         if (arg->max_size < size)
 207                 size = arg->max_size;
 208
 209         bounce = vzalloc(size);
 210         if (unlikely(bounce == NULL)) {
 211                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 212                 return -ENOMEM;
 213         }
 214
 215         if (gb_objects && vmw_fp->gb_aware) {
 216                 int i, num;
 217                 uint32_t *bounce32 = (uint32_t *) bounce;
 218
 219                 num = size / sizeof(uint32_t);
 220                 if (num > SVGA3D_DEVCAP_MAX)
 221                         num = SVGA3D_DEVCAP_MAX;
 222
 223                 spin_lock(&dev_priv->cap_lock);
 224                 for (i = 0; i < num; ++i) {
 225                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 226                         *bounce32++ = vmw_mask_legacy_multisample
 227                                 (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 228                 }
 229                 spin_unlock(&dev_priv->cap_lock);
 230         } else if (gb_objects) {
 231                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 232                 if (unlikely(ret != 0))
 233                         goto out_err;
 234         } else {
 235                 fifo_mem = dev_priv->fifo_mem;
 236                 memcpy(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 237         }
 238
 239         ret = copy_to_user(buffer, bounce, size);
 240         if (ret)
 241                 ret = -EFAULT;
 242 out_err:
 243         vfree(bounce);
 244
 245         if (unlikely(ret != 0))
 246                 DRM_ERROR("Failed to report 3D caps info.\n");
 247
 248         return ret;
 249 }
 250
 251 int vmw_present_ioctl(struct drm_device *dev, void *data,
 252                       struct drm_file *file_priv)
 253 {
 254         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 255         struct vmw_private *dev_priv = vmw_priv(dev);
 256         struct drm_vmw_present_arg *arg =
 257                 (struct drm_vmw_present_arg *)data;
 258         struct vmw_surface *surface;
 259         struct drm_vmw_rect __user *clips_ptr;
 260         struct drm_vmw_rect *clips = NULL;
 261         struct drm_framebuffer *fb;
 262         struct vmw_framebuffer *vfb;
 263         struct vmw_resource *res;
 264         uint32_t num_clips;
 265         int ret;
 266
 267         num_clips = arg->num_clips;
 268         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 269
 270         if (unlikely(num_clips == 0))
 271                 return 0;
 272
 273         if (clips_ptr == NULL) {
 274                 VMW_DEBUG_USER("Variable clips_ptr must be specified.\n");
 275                 ret = -EINVAL;
 276                 goto out_clips;
 277         }
 278
 279         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 280         if (clips == NULL) {
 281                 DRM_ERROR("Failed to allocate clip rect list.\n");
 282                 ret = -ENOMEM;
 283                 goto out_clips;
 284         }
 285
 286         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 287         if (ret) {
 288                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 289                 ret = -EFAULT;
 290                 goto out_no_copy;
 291         }
 292
 293         drm_modeset_lock_all(dev);
 294
 295         fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 296         if (!fb) {
 297                 VMW_DEBUG_USER("Invalid framebuffer id.\n");
 298                 ret = -ENOENT;
 299                 goto out_no_fb;
 300         }
 301         vfb = vmw_framebuffer_to_vfb(fb);
 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         drm_framebuffer_put(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                 VMW_DEBUG_USER("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                 VMW_DEBUG_USER("Invalid framebuffer id.\n");
 375                 ret = -ENOENT;
 376                 goto out_no_fb;
 377         }
 378
 379         vfb = vmw_framebuffer_to_vfb(fb);
 380         if (!vfb->bo) {
 381                 VMW_DEBUG_USER("Framebuffer not buffer backed.\n");
 382                 ret = -EINVAL;
 383                 goto out_no_ttm_lock;
 384         }
 385
 386         ret = vmw_kms_readback(dev_priv, file_priv,
 387                                vfb, user_fence_rep,
 388                                clips, num_clips);
 389
 390 out_no_ttm_lock:
 391         drm_framebuffer_put(fb);
 392 out_no_fb:
 393         drm_modeset_unlock_all(dev);
 394 out_no_copy:
 395         kfree(clips);
 396 out_clips:
 397         return ret;
 398 }