LXR linux/drivers/gpu/drm/vmwgfx/vmwgfx

   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
  33struct svga_3d_compat_cap {
  34        SVGA3dCapsRecordHeader header;
  35        SVGA3dCapPair pairs[SVGA3D_DEVCAP_MAX];
  36};
  37
  38int 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
 131static 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
 147static 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
 181int 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;
 244out_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
 253int 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
 324out_no_surface:
 325        ttm_read_unlock(&dev_priv->reservation_sem);
 326out_no_ttm_lock:
 327        drm_framebuffer_put(fb);
 328out_no_fb:
 329        drm_modeset_unlock_all(dev);
 330out_no_copy:
 331        kfree(clips);
 332out_clips:
 333        return ret;
 334}
 335
 336int 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);
 403out_no_ttm_lock:
 404        drm_framebuffer_put(fb);
 405out_no_fb:
 406        drm_modeset_unlock_all(dev);
 407out_no_copy:
 408        kfree(clips);
 409out_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 */
 445ssize_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}
 455