drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2009 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
  32 struct svga_3d_compat_cap {
  33         SVGA3dCapsRecordHeader header;
  34         SVGA3dCapPair pairs[SVGA3D_DEVCAP_MAX];
  35 };
  36
  37 int vmw_getparam_ioctl(struct drm_device *dev, void *data,
  38                        struct drm_file *file_priv)
  39 {
  40         struct vmw_private *dev_priv = vmw_priv(dev);
  41         struct drm_vmw_getparam_arg *param =
  42             (struct drm_vmw_getparam_arg *)data;
  43         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
  44
  45         switch (param->param) {
  46         case DRM_VMW_PARAM_NUM_STREAMS:
  47                 param->value = vmw_overlay_num_overlays(dev_priv);
  48                 break;
  49         case DRM_VMW_PARAM_NUM_FREE_STREAMS:
  50                 param->value = vmw_overlay_num_free_overlays(dev_priv);
  51                 break;
  52         case DRM_VMW_PARAM_3D:
  53                 param->value = vmw_fifo_have_3d(dev_priv) ? 1 : 0;
  54                 break;
  55         case DRM_VMW_PARAM_HW_CAPS:
  56                 param->value = dev_priv->capabilities;
  57                 break;
  58         case DRM_VMW_PARAM_FIFO_CAPS:
  59                 param->value = dev_priv->fifo.capabilities;
  60                 break;
  61         case DRM_VMW_PARAM_MAX_FB_SIZE:
  62                 param->value = dev_priv->prim_bb_mem;
  63                 break;
  64         case DRM_VMW_PARAM_FIFO_HW_VERSION:
  65         {
  66                 __le32 __iomem *fifo_mem = dev_priv->mmio_virt;
  67                 const struct vmw_fifo_state *fifo = &dev_priv->fifo;
  68
  69                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS)) {
  70                         param->value = SVGA3D_HWVERSION_WS8_B1;
  71                         break;
  72                 }
  73
  74                 param->value =
  75                         ioread32(fifo_mem +
  76                                  ((fifo->capabilities &
  77                                    SVGA_FIFO_CAP_3D_HWVERSION_REVISED) ?
  78                                   SVGA_FIFO_3D_HWVERSION_REVISED :
  79                                   SVGA_FIFO_3D_HWVERSION));
  80                 break;
  81         }
  82         case DRM_VMW_PARAM_MAX_SURF_MEMORY:
  83                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  84                     !vmw_fp->gb_aware)
  85                         param->value = dev_priv->max_mob_pages * PAGE_SIZE / 2;
  86                 else
  87                         param->value = dev_priv->memory_size;
  88                 break;
  89         case DRM_VMW_PARAM_3D_CAPS_SIZE:
  90                 if ((dev_priv->capabilities & SVGA_CAP_GBOBJECTS) &&
  91                     vmw_fp->gb_aware)
  92                         param->value = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
  93                 else if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS)
  94                         param->value = sizeof(struct svga_3d_compat_cap) +
  95                                 sizeof(uint32_t);
  96                 else
  97                         param->value = (SVGA_FIFO_3D_CAPS_LAST -
  98                                         SVGA_FIFO_3D_CAPS + 1) *
  99                                 sizeof(uint32_t);
 100                 break;
 101         case DRM_VMW_PARAM_MAX_MOB_MEMORY:
 102                 vmw_fp->gb_aware = true;
 103                 param->value = dev_priv->max_mob_pages * PAGE_SIZE;
 104                 break;
 105         default:
 106                 DRM_ERROR("Illegal vmwgfx get param request: %d\n",
 107                           param->param);
 108                 return -EINVAL;
 109         }
 110
 111         return 0;
 112 }
 113
 114 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 115                                size_t size)
 116 {
 117         struct svga_3d_compat_cap *compat_cap =
 118                 (struct svga_3d_compat_cap *) bounce;
 119         unsigned int i;
 120         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 121         unsigned int max_size;
 122
 123         if (size < pair_offset)
 124                 return -EINVAL;
 125
 126         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 127
 128         if (max_size > SVGA3D_DEVCAP_MAX)
 129                 max_size = SVGA3D_DEVCAP_MAX;
 130
 131         compat_cap->header.length =
 132                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 133         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 134
 135         mutex_lock(&dev_priv->hw_mutex);
 136         for (i = 0; i < max_size; ++i) {
 137                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 138                 compat_cap->pairs[i][0] = i;
 139                 compat_cap->pairs[i][1] = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
 140         }
 141         mutex_unlock(&dev_priv->hw_mutex);
 142
 143         return 0;
 144 }
 145
 146
 147 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 148                          struct drm_file *file_priv)
 149 {
 150         struct drm_vmw_get_3d_cap_arg *arg =
 151                 (struct drm_vmw_get_3d_cap_arg *) data;
 152         struct vmw_private *dev_priv = vmw_priv(dev);
 153         uint32_t size;
 154         __le32 __iomem *fifo_mem;
 155         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 156         void *bounce;
 157         int ret;
 158         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 159         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 160
 161         if (unlikely(arg->pad64 != 0)) {
 162                 DRM_ERROR("Illegal GET_3D_CAP argument.\n");
 163                 return -EINVAL;
 164         }
 165
 166         if (gb_objects && vmw_fp->gb_aware)
 167                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 168         else if (gb_objects)
 169                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 170         else
 171                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 172                         sizeof(uint32_t);
 173
 174         if (arg->max_size < size)
 175                 size = arg->max_size;
 176
 177         bounce = vzalloc(size);
 178         if (unlikely(bounce == NULL)) {
 179                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 180                 return -ENOMEM;
 181         }
 182
 183         if (gb_objects && vmw_fp->gb_aware) {
 184                 int i, num;
 185                 uint32_t *bounce32 = (uint32_t *) bounce;
 186
 187                 num = size / sizeof(uint32_t);
 188                 if (num > SVGA3D_DEVCAP_MAX)
 189                         num = SVGA3D_DEVCAP_MAX;
 190
 191                 mutex_lock(&dev_priv->hw_mutex);
 192                 for (i = 0; i < num; ++i) {
 193                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 194                         *bounce32++ = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
 195                 }
 196                 mutex_unlock(&dev_priv->hw_mutex);
 197         } else if (gb_objects) {
 198                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 199                 if (unlikely(ret != 0))
 200                         goto out_err;
 201         } else {
 202                 fifo_mem = dev_priv->mmio_virt;
 203                 memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 204         }
 205
 206         ret = copy_to_user(buffer, bounce, size);
 207         if (ret)
 208                 ret = -EFAULT;
 209 out_err:
 210         vfree(bounce);
 211
 212         if (unlikely(ret != 0))
 213                 DRM_ERROR("Failed to report 3D caps info.\n");
 214
 215         return ret;
 216 }
 217
 218 int vmw_present_ioctl(struct drm_device *dev, void *data,
 219                       struct drm_file *file_priv)
 220 {
 221         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 222         struct vmw_private *dev_priv = vmw_priv(dev);
 223         struct drm_vmw_present_arg *arg =
 224                 (struct drm_vmw_present_arg *)data;
 225         struct vmw_surface *surface;
 226         struct vmw_master *vmaster = vmw_master(file_priv->master);
 227         struct drm_vmw_rect __user *clips_ptr;
 228         struct drm_vmw_rect *clips = NULL;
 229         struct drm_framebuffer *fb;
 230         struct vmw_framebuffer *vfb;
 231         struct vmw_resource *res;
 232         uint32_t num_clips;
 233         int ret;
 234
 235         num_clips = arg->num_clips;
 236         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 237
 238         if (unlikely(num_clips == 0))
 239                 return 0;
 240
 241         if (clips_ptr == NULL) {
 242                 DRM_ERROR("Variable clips_ptr must be specified.\n");
 243                 ret = -EINVAL;
 244                 goto out_clips;
 245         }
 246
 247         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 248         if (clips == NULL) {
 249                 DRM_ERROR("Failed to allocate clip rect list.\n");
 250                 ret = -ENOMEM;
 251                 goto out_clips;
 252         }
 253
 254         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 255         if (ret) {
 256                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 257                 ret = -EFAULT;
 258                 goto out_no_copy;
 259         }
 260
 261         drm_modeset_lock_all(dev);
 262
 263         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 264         if (!fb) {
 265                 DRM_ERROR("Invalid framebuffer id.\n");
 266                 ret = -ENOENT;
 267                 goto out_no_fb;
 268         }
 269         vfb = vmw_framebuffer_to_vfb(fb);
 270
 271         ret = ttm_read_lock(&vmaster->lock, true);
 272         if (unlikely(ret != 0))
 273                 goto out_no_ttm_lock;
 274
 275         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 276                                               user_surface_converter,
 277                                               &res);
 278         if (ret)
 279                 goto out_no_surface;
 280
 281         surface = vmw_res_to_srf(res);
 282         ret = vmw_kms_present(dev_priv, file_priv,
 283                               vfb, surface, arg->sid,
 284                               arg->dest_x, arg->dest_y,
 285                               clips, num_clips);
 286
 287         /* vmw_user_surface_lookup takes one ref so does new_fb */
 288         vmw_surface_unreference(&surface);
 289
 290 out_no_surface:
 291         ttm_read_unlock(&vmaster->lock);
 292 out_no_ttm_lock:
 293         drm_framebuffer_unreference(fb);
 294 out_no_fb:
 295         drm_modeset_unlock_all(dev);
 296 out_no_copy:
 297         kfree(clips);
 298 out_clips:
 299         return ret;
 300 }
 301
 302 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 303                                struct drm_file *file_priv)
 304 {
 305         struct vmw_private *dev_priv = vmw_priv(dev);
 306         struct drm_vmw_present_readback_arg *arg =
 307                 (struct drm_vmw_present_readback_arg *)data;
 308         struct drm_vmw_fence_rep __user *user_fence_rep =
 309                 (struct drm_vmw_fence_rep __user *)
 310                 (unsigned long)arg->fence_rep;
 311         struct vmw_master *vmaster = vmw_master(file_priv->master);
 312         struct drm_vmw_rect __user *clips_ptr;
 313         struct drm_vmw_rect *clips = NULL;
 314         struct drm_framebuffer *fb;
 315         struct vmw_framebuffer *vfb;
 316         uint32_t num_clips;
 317         int ret;
 318
 319         num_clips = arg->num_clips;
 320         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 321
 322         if (unlikely(num_clips == 0))
 323                 return 0;
 324
 325         if (clips_ptr == NULL) {
 326                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 327                 ret = -EINVAL;
 328                 goto out_clips;
 329         }
 330
 331         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 332         if (clips == NULL) {
 333                 DRM_ERROR("Failed to allocate clip rect list.\n");
 334                 ret = -ENOMEM;
 335                 goto out_clips;
 336         }
 337
 338         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 339         if (ret) {
 340                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 341                 ret = -EFAULT;
 342                 goto out_no_copy;
 343         }
 344
 345         drm_modeset_lock_all(dev);
 346
 347         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 348         if (!fb) {
 349                 DRM_ERROR("Invalid framebuffer id.\n");
 350                 ret = -ENOENT;
 351                 goto out_no_fb;
 352         }
 353
 354         vfb = vmw_framebuffer_to_vfb(fb);
 355         if (!vfb->dmabuf) {
 356                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 357                 ret = -EINVAL;
 358                 goto out_no_ttm_lock;
 359         }
 360
 361         ret = ttm_read_lock(&vmaster->lock, true);
 362         if (unlikely(ret != 0))
 363                 goto out_no_ttm_lock;
 364
 365         ret = vmw_kms_readback(dev_priv, file_priv,
 366                                vfb, user_fence_rep,
 367                                clips, num_clips);
 368
 369         ttm_read_unlock(&vmaster->lock);
 370 out_no_ttm_lock:
 371         drm_framebuffer_unreference(fb);
 372 out_no_fb:
 373         drm_modeset_unlock_all(dev);
 374 out_no_copy:
 375         kfree(clips);
 376 out_clips:
 377         return ret;
 378 }
 379
 380
 381 /**
 382  * vmw_fops_poll - wrapper around the drm_poll function
 383  *
 384  * @filp: See the linux fops poll documentation.
 385  * @wait: See the linux fops poll documentation.
 386  *
 387  * Wrapper around the drm_poll function that makes sure the device is
 388  * processing the fifo if drm_poll decides to wait.
 389  */
 390 unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 391 {
 392         struct drm_file *file_priv = filp->private_data;
 393         struct vmw_private *dev_priv =
 394                 vmw_priv(file_priv->minor->dev);
 395
 396         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 397         return drm_poll(filp, wait);
 398 }
 399
 400
 401 /**
 402  * vmw_fops_read - wrapper around the drm_read function
 403  *
 404  * @filp: See the linux fops read documentation.
 405  * @buffer: See the linux fops read documentation.
 406  * @count: See the linux fops read documentation.
 407  * offset: See the linux fops read documentation.
 408  *
 409  * Wrapper around the drm_read function that makes sure the device is
 410  * processing the fifo if drm_read decides to wait.
 411  */
 412 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 413                       size_t count, loff_t *offset)
 414 {
 415         struct drm_file *file_priv = filp->private_data;
 416         struct vmw_private *dev_priv =
 417                 vmw_priv(file_priv->minor->dev);
 418
 419         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 420         return drm_read(filp, buffer, count, offset);
 421 }