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

   1/**************************************************************************
   2 *
   3 * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA
   4 * All Rights Reserved.
   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_FIFO_CAPS:
  60                param->value = dev_priv->fifo.capabilities;
  61                break;
  62        case DRM_VMW_PARAM_MAX_FB_SIZE:
  63                param->value = dev_priv->prim_bb_mem;
  64                break;
  65        case DRM_VMW_PARAM_FIFO_HW_VERSION:
  66        {
  67                u32 *fifo_mem = dev_priv->mmio_virt;
  68                const struct vmw_fifo_state *fifo = &dev_priv->fifo;
  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_mmio_read(fifo_mem +
  77                                      ((fifo->capabilities &
  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 = dev_priv->has_dx;
 115                break;
 116        default:
 117                return -EINVAL;
 118        }
 119
 120        return 0;
 121}
 122
 123static u32 vmw_mask_multisample(unsigned int cap, u32 fmt_value)
 124{
 125        /* If the header is updated, update the format test as well! */
 126        BUILD_BUG_ON(SVGA3D_DEVCAP_DXFMT_BC5_UNORM + 1 != SVGA3D_DEVCAP_MAX);
 127
 128        if (cap >= SVGA3D_DEVCAP_DXFMT_X8R8G8B8 &&
 129            cap <= SVGA3D_DEVCAP_DXFMT_BC5_UNORM)
 130                fmt_value &= ~(SVGADX_DXFMT_MULTISAMPLE_2 |
 131                               SVGADX_DXFMT_MULTISAMPLE_4 |
 132                               SVGADX_DXFMT_MULTISAMPLE_8);
 133        else if (cap == SVGA3D_DEVCAP_MULTISAMPLE_MASKABLESAMPLES)
 134                return 0;
 135
 136        return fmt_value;
 137}
 138
 139static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 140                               size_t size)
 141{
 142        struct svga_3d_compat_cap *compat_cap =
 143                (struct svga_3d_compat_cap *) bounce;
 144        unsigned int i;
 145        size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 146        unsigned int max_size;
 147
 148        if (size < pair_offset)
 149                return -EINVAL;
 150
 151        max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 152
 153        if (max_size > SVGA3D_DEVCAP_MAX)
 154                max_size = SVGA3D_DEVCAP_MAX;
 155
 156        compat_cap->header.length =
 157                (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 158        compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 159
 160        spin_lock(&dev_priv->cap_lock);
 161        for (i = 0; i < max_size; ++i) {
 162                vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 163                compat_cap->pairs[i][0] = i;
 164                compat_cap->pairs[i][1] = vmw_mask_multisample
 165                        (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 166        }
 167        spin_unlock(&dev_priv->cap_lock);
 168
 169        return 0;
 170}
 171
 172
 173int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 174                         struct drm_file *file_priv)
 175{
 176        struct drm_vmw_get_3d_cap_arg *arg =
 177                (struct drm_vmw_get_3d_cap_arg *) data;
 178        struct vmw_private *dev_priv = vmw_priv(dev);
 179        uint32_t size;
 180        u32 *fifo_mem;
 181        void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 182        void *bounce;
 183        int ret;
 184        bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 185        struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 186
 187        if (unlikely(arg->pad64 != 0 || arg->max_size == 0)) {
 188                DRM_ERROR("Illegal GET_3D_CAP argument.\n");
 189                return -EINVAL;
 190        }
 191
 192        if (gb_objects && vmw_fp->gb_aware)
 193                size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 194        else if (gb_objects)
 195                size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 196        else
 197                size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 198                        sizeof(uint32_t);
 199
 200        if (arg->max_size < size)
 201                size = arg->max_size;
 202
 203        bounce = vzalloc(size);
 204        if (unlikely(bounce == NULL)) {
 205                DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 206                return -ENOMEM;
 207        }
 208
 209        if (gb_objects && vmw_fp->gb_aware) {
 210                int i, num;
 211                uint32_t *bounce32 = (uint32_t *) bounce;
 212
 213                num = size / sizeof(uint32_t);
 214                if (num > SVGA3D_DEVCAP_MAX)
 215                        num = SVGA3D_DEVCAP_MAX;
 216
 217                spin_lock(&dev_priv->cap_lock);
 218                for (i = 0; i < num; ++i) {
 219                        vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 220                        *bounce32++ = vmw_mask_multisample
 221                                (i, vmw_read(dev_priv, SVGA_REG_DEV_CAP));
 222                }
 223                spin_unlock(&dev_priv->cap_lock);
 224        } else if (gb_objects) {
 225                ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 226                if (unlikely(ret != 0))
 227                        goto out_err;
 228        } else {
 229                fifo_mem = dev_priv->mmio_virt;
 230                memcpy(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 231        }
 232
 233        ret = copy_to_user(buffer, bounce, size);
 234        if (ret)
 235                ret = -EFAULT;
 236out_err:
 237        vfree(bounce);
 238
 239        if (unlikely(ret != 0))
 240                DRM_ERROR("Failed to report 3D caps info.\n");
 241
 242        return ret;
 243}
 244
 245int vmw_present_ioctl(struct drm_device *dev, void *data,
 246                      struct drm_file *file_priv)
 247{
 248        struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 249        struct vmw_private *dev_priv = vmw_priv(dev);
 250        struct drm_vmw_present_arg *arg =
 251                (struct drm_vmw_present_arg *)data;
 252        struct vmw_surface *surface;
 253        struct drm_vmw_rect __user *clips_ptr;
 254        struct drm_vmw_rect *clips = NULL;
 255        struct drm_framebuffer *fb;
 256        struct vmw_framebuffer *vfb;
 257        struct vmw_resource *res;
 258        uint32_t num_clips;
 259        int ret;
 260
 261        num_clips = arg->num_clips;
 262        clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 263
 264        if (unlikely(num_clips == 0))
 265                return 0;
 266
 267        if (clips_ptr == NULL) {
 268                DRM_ERROR("Variable clips_ptr must be specified.\n");
 269                ret = -EINVAL;
 270                goto out_clips;
 271        }
 272
 273        clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 274        if (clips == NULL) {
 275                DRM_ERROR("Failed to allocate clip rect list.\n");
 276                ret = -ENOMEM;
 277                goto out_clips;
 278        }
 279
 280        ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 281        if (ret) {
 282                DRM_ERROR("Failed to copy clip rects from userspace.\n");
 283                ret = -EFAULT;
 284                goto out_no_copy;
 285        }
 286
 287        drm_modeset_lock_all(dev);
 288
 289        fb = drm_framebuffer_lookup(dev, arg->fb_id);
 290        if (!fb) {
 291                DRM_ERROR("Invalid framebuffer id.\n");
 292                ret = -ENOENT;
 293                goto out_no_fb;
 294        }
 295        vfb = vmw_framebuffer_to_vfb(fb);
 296
 297        ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 298        if (unlikely(ret != 0))
 299                goto out_no_ttm_lock;
 300
 301        ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 302                                              user_surface_converter,
 303                                              &res);
 304        if (ret)
 305                goto out_no_surface;
 306
 307        surface = vmw_res_to_srf(res);
 308        ret = vmw_kms_present(dev_priv, file_priv,
 309                              vfb, surface, arg->sid,
 310                              arg->dest_x, arg->dest_y,
 311                              clips, num_clips);
 312
 313        /* vmw_user_surface_lookup takes one ref so does new_fb */
 314        vmw_surface_unreference(&surface);
 315
 316out_no_surface:
 317        ttm_read_unlock(&dev_priv->reservation_sem);
 318out_no_ttm_lock:
 319        drm_framebuffer_unreference(fb);
 320out_no_fb:
 321        drm_modeset_unlock_all(dev);
 322out_no_copy:
 323        kfree(clips);
 324out_clips:
 325        return ret;
 326}
 327
 328int 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                DRM_ERROR("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, arg->fb_id);
 373        if (!fb) {
 374                DRM_ERROR("Invalid framebuffer id.\n");
 375                ret = -ENOENT;
 376                goto out_no_fb;
 377        }
 378
 379        vfb = vmw_framebuffer_to_vfb(fb);
 380        if (!vfb->dmabuf) {
 381                DRM_ERROR("Framebuffer not dmabuf backed.\n");
 382                ret = -EINVAL;
 383                goto out_no_ttm_lock;
 384        }
 385
 386        ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 387        if (unlikely(ret != 0))
 388                goto out_no_ttm_lock;
 389
 390        ret = vmw_kms_readback(dev_priv, file_priv,
 391                               vfb, user_fence_rep,
 392                               clips, num_clips);
 393
 394        ttm_read_unlock(&dev_priv->reservation_sem);
 395out_no_ttm_lock:
 396        drm_framebuffer_unreference(fb);
 397out_no_fb:
 398        drm_modeset_unlock_all(dev);
 399out_no_copy:
 400        kfree(clips);
 401out_clips:
 402        return ret;
 403}
 404
 405
 406/**
 407 * vmw_fops_poll - wrapper around the drm_poll function
 408 *
 409 * @filp: See the linux fops poll documentation.
 410 * @wait: See the linux fops poll documentation.
 411 *
 412 * Wrapper around the drm_poll function that makes sure the device is
 413 * processing the fifo if drm_poll decides to wait.
 414 */
 415unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 416{
 417        struct drm_file *file_priv = filp->private_data;
 418        struct vmw_private *dev_priv =
 419                vmw_priv(file_priv->minor->dev);
 420
 421        vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 422        return drm_poll(filp, wait);
 423}
 424
 425
 426/**
 427 * vmw_fops_read - wrapper around the drm_read function
 428 *
 429 * @filp: See the linux fops read documentation.
 430 * @buffer: See the linux fops read documentation.
 431 * @count: See the linux fops read documentation.
 432 * offset: See the linux fops read documentation.
 433 *
 434 * Wrapper around the drm_read function that makes sure the device is
 435 * processing the fifo if drm_read decides to wait.
 436 */
 437ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 438                      size_t count, loff_t *offset)
 439{
 440        struct drm_file *file_priv = filp->private_data;
 441        struct vmw_private *dev_priv =
 442                vmw_priv(file_priv->minor->dev);
 443
 444        vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 445        return drm_read(filp, buffer, count, offset);
 446}
 447