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_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
 132static 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
 148static 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
 182int 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;
 245out_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
 254int 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
 325out_no_surface:
 326        ttm_read_unlock(&dev_priv->reservation_sem);
 327out_no_ttm_lock:
 328        drm_framebuffer_put(fb);
 329out_no_fb:
 330        drm_modeset_unlock_all(dev);
 331out_no_copy:
 332        kfree(clips);
 333out_clips:
 334        return ret;
 335}
 336
 337int 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);
 404out_no_ttm_lock:
 405        drm_framebuffer_put(fb);
 406out_no_fb:
 407        drm_modeset_unlock_all(dev);
 408out_no_copy:
 409        kfree(clips);
 410out_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 */
 446ssize_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}
 456