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 = dev_priv->has_dx;
 118                break;
 119        case DRM_VMW_PARAM_SM4_1:
 120                param->value = dev_priv->has_sm4_1;
 121                break;
 122        default:
 123                return -EINVAL;
 124        }
 125
 126        return 0;
 127}
 128
 129static u32 vmw_mask_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        if (cap == SVGA3D_DEVCAP_MULTISAMPLE_MASKABLESAMPLES)
 137                return 0;
 138
 139        return fmt_value;
 140}
 141
 142static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 143                               size_t size)
 144{
 145        struct svga_3d_compat_cap *compat_cap =
 146                (struct svga_3d_compat_cap *) bounce;
 147        unsigned int i;
 148        size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 149        unsigned int max_size;
 150
 151        if (size < pair_offset)
 152                return -EINVAL;
 153
 154        max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 155
 156        if (max_size > SVGA3D_DEVCAP_MAX)
 157                max_size = SVGA3D_DEVCAP_MAX;
 158
 159        compat_cap->header.length =
 160                (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 161        compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 162
 163        spin_lock(&dev_priv->cap_lock);
 164        for (i = 0; i < max_size; ++i) {
 165                vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 166                compat_cap->pairs[i][0] = i;
 167                compat_cap->pairs[i][1] = vmw_mask_multisample
 168                        (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 169        }
 170        spin_unlock(&dev_priv->cap_lock);
 171
 172        return 0;
 173}
 174
 175
 176int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 177                         struct drm_file *file_priv)
 178{
 179        struct drm_vmw_get_3d_cap_arg *arg =
 180                (struct drm_vmw_get_3d_cap_arg *) data;
 181        struct vmw_private *dev_priv = vmw_priv(dev);
 182        uint32_t size;
 183        u32 *fifo_mem;
 184        void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 185        void *bounce;
 186        int ret;
 187        bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 188        struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 189
 190        if (unlikely(arg->pad64 != 0 || arg->max_size == 0)) {
 191                DRM_ERROR("Illegal GET_3D_CAP argument.\n");
 192                return -EINVAL;
 193        }
 194
 195        if (gb_objects && vmw_fp->gb_aware)
 196                size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 197        else if (gb_objects)
 198                size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 199        else
 200                size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 201                        sizeof(uint32_t);
 202
 203        if (arg->max_size < size)
 204                size = arg->max_size;
 205
 206        bounce = vzalloc(size);
 207        if (unlikely(bounce == NULL)) {
 208                DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 209                return -ENOMEM;
 210        }
 211
 212        if (gb_objects && vmw_fp->gb_aware) {
 213                int i, num;
 214                uint32_t *bounce32 = (uint32_t *) bounce;
 215
 216                num = size / sizeof(uint32_t);
 217                if (num > SVGA3D_DEVCAP_MAX)
 218                        num = SVGA3D_DEVCAP_MAX;
 219
 220                spin_lock(&dev_priv->cap_lock);
 221                for (i = 0; i < num; ++i) {
 222                        vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 223                        *bounce32++ = vmw_mask_multisample
 224                                (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 225                }
 226                spin_unlock(&dev_priv->cap_lock);
 227        } else if (gb_objects) {
 228                ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 229                if (unlikely(ret != 0))
 230                        goto out_err;
 231        } else {
 232                fifo_mem = dev_priv->mmio_virt;
 233                memcpy(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 234        }
 235
 236        ret = copy_to_user(buffer, bounce, size);
 237        if (ret)
 238                ret = -EFAULT;
 239out_err:
 240        vfree(bounce);
 241
 242        if (unlikely(ret != 0))
 243                DRM_ERROR("Failed to report 3D caps info.\n");
 244
 245        return ret;
 246}
 247
 248int vmw_present_ioctl(struct drm_device *dev, void *data,
 249                      struct drm_file *file_priv)
 250{
 251        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 252        struct vmw_private *dev_priv = vmw_priv(dev);
 253        struct drm_vmw_present_arg *arg =
 254                (struct drm_vmw_present_arg *)data;
 255        struct vmw_surface *surface;
 256        struct drm_vmw_rect __user *clips_ptr;
 257        struct drm_vmw_rect *clips = NULL;
 258        struct drm_framebuffer *fb;
 259        struct vmw_framebuffer *vfb;
 260        struct vmw_resource *res;
 261        uint32_t num_clips;
 262        int ret;
 263
 264        num_clips = arg->num_clips;
 265        clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 266
 267        if (unlikely(num_clips == 0))
 268                return 0;
 269
 270        if (clips_ptr == NULL) {
 271                DRM_ERROR("Variable clips_ptr must be specified.\n");
 272                ret = -EINVAL;
 273                goto out_clips;
 274        }
 275
 276        clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 277        if (clips == NULL) {
 278                DRM_ERROR("Failed to allocate clip rect list.\n");
 279                ret = -ENOMEM;
 280                goto out_clips;
 281        }
 282
 283        ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 284        if (ret) {
 285                DRM_ERROR("Failed to copy clip rects from userspace.\n");
 286                ret = -EFAULT;
 287                goto out_no_copy;
 288        }
 289
 290        drm_modeset_lock_all(dev);
 291
 292        fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 293        if (!fb) {
 294                DRM_ERROR("Invalid framebuffer id.\n");
 295                ret = -ENOENT;
 296                goto out_no_fb;
 297        }
 298        vfb = vmw_framebuffer_to_vfb(fb);
 299
 300        ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 301        if (unlikely(ret != 0))
 302                goto out_no_ttm_lock;
 303
 304        ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 305                                              user_surface_converter,
 306                                              &res);
 307        if (ret)
 308                goto out_no_surface;
 309
 310        surface = vmw_res_to_srf(res);
 311        ret = vmw_kms_present(dev_priv, file_priv,
 312                              vfb, surface, arg->sid,
 313                              arg->dest_x, arg->dest_y,
 314                              clips, num_clips);
 315
 316        /* vmw_user_surface_lookup takes one ref so does new_fb */
 317        vmw_surface_unreference(&surface);
 318
 319out_no_surface:
 320        ttm_read_unlock(&dev_priv->reservation_sem);
 321out_no_ttm_lock:
 322        drm_framebuffer_put(fb);
 323out_no_fb:
 324        drm_modeset_unlock_all(dev);
 325out_no_copy:
 326        kfree(clips);
 327out_clips:
 328        return ret;
 329}
 330
 331int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 332                               struct drm_file *file_priv)
 333{
 334        struct vmw_private *dev_priv = vmw_priv(dev);
 335        struct drm_vmw_present_readback_arg *arg =
 336                (struct drm_vmw_present_readback_arg *)data;
 337        struct drm_vmw_fence_rep __user *user_fence_rep =
 338                (struct drm_vmw_fence_rep __user *)
 339                (unsigned long)arg->fence_rep;
 340        struct drm_vmw_rect __user *clips_ptr;
 341        struct drm_vmw_rect *clips = NULL;
 342        struct drm_framebuffer *fb;
 343        struct vmw_framebuffer *vfb;
 344        uint32_t num_clips;
 345        int ret;
 346
 347        num_clips = arg->num_clips;
 348        clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 349
 350        if (unlikely(num_clips == 0))
 351                return 0;
 352
 353        if (clips_ptr == NULL) {
 354                DRM_ERROR("Argument clips_ptr must be specified.\n");
 355                ret = -EINVAL;
 356                goto out_clips;
 357        }
 358
 359        clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 360        if (clips == NULL) {
 361                DRM_ERROR("Failed to allocate clip rect list.\n");
 362                ret = -ENOMEM;
 363                goto out_clips;
 364        }
 365
 366        ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 367        if (ret) {
 368                DRM_ERROR("Failed to copy clip rects from userspace.\n");
 369                ret = -EFAULT;
 370                goto out_no_copy;
 371        }
 372
 373        drm_modeset_lock_all(dev);
 374
 375        fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 376        if (!fb) {
 377                DRM_ERROR("Invalid framebuffer id.\n");
 378                ret = -ENOENT;
 379                goto out_no_fb;
 380        }
 381
 382        vfb = vmw_framebuffer_to_vfb(fb);
 383        if (!vfb->bo) {
 384                DRM_ERROR("Framebuffer not buffer backed.\n");
 385                ret = -EINVAL;
 386                goto out_no_ttm_lock;
 387        }
 388
 389        ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 390        if (unlikely(ret != 0))
 391                goto out_no_ttm_lock;
 392
 393        ret = vmw_kms_readback(dev_priv, file_priv,
 394                               vfb, user_fence_rep,
 395                               clips, num_clips);
 396
 397        ttm_read_unlock(&dev_priv->reservation_sem);
 398out_no_ttm_lock:
 399        drm_framebuffer_put(fb);
 400out_no_fb:
 401        drm_modeset_unlock_all(dev);
 402out_no_copy:
 403        kfree(clips);
 404out_clips:
 405        return ret;
 406}
 407
 408
 409/**
 410 * vmw_fops_poll - wrapper around the drm_poll function
 411 *
 412 * @filp: See the linux fops poll documentation.
 413 * @wait: See the linux fops poll documentation.
 414 *
 415 * Wrapper around the drm_poll function that makes sure the device is
 416 * processing the fifo if drm_poll decides to wait.
 417 */
 418__poll_t vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 419{
 420        struct drm_file *file_priv = filp->private_data;
 421        struct vmw_private *dev_priv =
 422                vmw_priv(file_priv->minor->dev);
 423
 424        vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 425        return drm_poll(filp, wait);
 426}
 427
 428
 429/**
 430 * vmw_fops_read - wrapper around the drm_read function
 431 *
 432 * @filp: See the linux fops read documentation.
 433 * @buffer: See the linux fops read documentation.
 434 * @count: See the linux fops read documentation.
 435 * offset: See the linux fops read documentation.
 436 *
 437 * Wrapper around the drm_read function that makes sure the device is
 438 * processing the fifo if drm_read decides to wait.
 439 */
 440ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 441                      size_t count, loff_t *offset)
 442{
 443        struct drm_file *file_priv = filp->private_data;
 444        struct vmw_private *dev_priv =
 445                vmw_priv(file_priv->minor->dev);
 446
 447        vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 448        return drm_read(filp, buffer, count, offset);
 449}
 450