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                 u32 __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         case DRM_VMW_PARAM_MAX_MOB_SIZE:
 106                 param->value = dev_priv->max_mob_size;
 107                 break;
 108         case DRM_VMW_PARAM_SCREEN_TARGET:
 109                 param->value =
 110                         (dev_priv->active_display_unit == vmw_du_screen_target);
 111                 break;
 112         default:
 113                 DRM_ERROR("Illegal vmwgfx get param request: %d\n",
 114                           param->param);
 115                 return -EINVAL;
 116         }
 117
 118         return 0;
 119 }
 120
 121 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 122                                size_t size)
 123 {
 124         struct svga_3d_compat_cap *compat_cap =
 125                 (struct svga_3d_compat_cap *) bounce;
 126         unsigned int i;
 127         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 128         unsigned int max_size;
 129
 130         if (size < pair_offset)
 131                 return -EINVAL;
 132
 133         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 134
 135         if (max_size > SVGA3D_DEVCAP_MAX)
 136                 max_size = SVGA3D_DEVCAP_MAX;
 137
 138         compat_cap->header.length =
 139                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 140         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 141
 142         spin_lock(&dev_priv->cap_lock);
 143         for (i = 0; i < max_size; ++i) {
 144                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 145                 compat_cap->pairs[i][0] = i;
 146                 compat_cap->pairs[i][1] = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
 147         }
 148         spin_unlock(&dev_priv->cap_lock);
 149
 150         return 0;
 151 }
 152
 153
 154 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 155                          struct drm_file *file_priv)
 156 {
 157         struct drm_vmw_get_3d_cap_arg *arg =
 158                 (struct drm_vmw_get_3d_cap_arg *) data;
 159         struct vmw_private *dev_priv = vmw_priv(dev);
 160         uint32_t size;
 161         u32 __iomem *fifo_mem;
 162         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 163         void *bounce;
 164         int ret;
 165         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 166         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 167
 168         if (unlikely(arg->pad64 != 0)) {
 169                 DRM_ERROR("Illegal GET_3D_CAP argument.\n");
 170                 return -EINVAL;
 171         }
 172
 173         if (gb_objects && vmw_fp->gb_aware)
 174                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 175         else if (gb_objects)
 176                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 177         else
 178                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 179                         sizeof(uint32_t);
 180
 181         if (arg->max_size < size)
 182                 size = arg->max_size;
 183
 184         bounce = vzalloc(size);
 185         if (unlikely(bounce == NULL)) {
 186                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 187                 return -ENOMEM;
 188         }
 189
 190         if (gb_objects && vmw_fp->gb_aware) {
 191                 int i, num;
 192                 uint32_t *bounce32 = (uint32_t *) bounce;
 193
 194                 num = size / sizeof(uint32_t);
 195                 if (num > SVGA3D_DEVCAP_MAX)
 196                         num = SVGA3D_DEVCAP_MAX;
 197
 198                 spin_lock(&dev_priv->cap_lock);
 199                 for (i = 0; i < num; ++i) {
 200                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 201                         *bounce32++ = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
 202                 }
 203                 spin_unlock(&dev_priv->cap_lock);
 204         } else if (gb_objects) {
 205                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 206                 if (unlikely(ret != 0))
 207                         goto out_err;
 208         } else {
 209                 fifo_mem = dev_priv->mmio_virt;
 210                 memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 211         }
 212
 213         ret = copy_to_user(buffer, bounce, size);
 214         if (ret)
 215                 ret = -EFAULT;
 216 out_err:
 217         vfree(bounce);
 218
 219         if (unlikely(ret != 0))
 220                 DRM_ERROR("Failed to report 3D caps info.\n");
 221
 222         return ret;
 223 }
 224
 225 int vmw_present_ioctl(struct drm_device *dev, void *data,
 226                       struct drm_file *file_priv)
 227 {
 228         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 229         struct vmw_private *dev_priv = vmw_priv(dev);
 230         struct drm_vmw_present_arg *arg =
 231                 (struct drm_vmw_present_arg *)data;
 232         struct vmw_surface *surface;
 233         struct drm_vmw_rect __user *clips_ptr;
 234         struct drm_vmw_rect *clips = NULL;
 235         struct drm_framebuffer *fb;
 236         struct vmw_framebuffer *vfb;
 237         struct vmw_resource *res;
 238         uint32_t num_clips;
 239         int ret;
 240
 241         num_clips = arg->num_clips;
 242         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 243
 244         if (unlikely(num_clips == 0))
 245                 return 0;
 246
 247         if (clips_ptr == NULL) {
 248                 DRM_ERROR("Variable clips_ptr must be specified.\n");
 249                 ret = -EINVAL;
 250                 goto out_clips;
 251         }
 252
 253         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 254         if (clips == NULL) {
 255                 DRM_ERROR("Failed to allocate clip rect list.\n");
 256                 ret = -ENOMEM;
 257                 goto out_clips;
 258         }
 259
 260         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 261         if (ret) {
 262                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 263                 ret = -EFAULT;
 264                 goto out_no_copy;
 265         }
 266
 267         drm_modeset_lock_all(dev);
 268
 269         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 270         if (!fb) {
 271                 DRM_ERROR("Invalid framebuffer id.\n");
 272                 ret = -ENOENT;
 273                 goto out_no_fb;
 274         }
 275         vfb = vmw_framebuffer_to_vfb(fb);
 276
 277         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 278         if (unlikely(ret != 0))
 279                 goto out_no_ttm_lock;
 280
 281         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 282                                               user_surface_converter,
 283                                               &res);
 284         if (ret)
 285                 goto out_no_surface;
 286
 287         surface = vmw_res_to_srf(res);
 288         ret = vmw_kms_present(dev_priv, file_priv,
 289                               vfb, surface, arg->sid,
 290                               arg->dest_x, arg->dest_y,
 291                               clips, num_clips);
 292
 293         /* vmw_user_surface_lookup takes one ref so does new_fb */
 294         vmw_surface_unreference(&surface);
 295
 296 out_no_surface:
 297         ttm_read_unlock(&dev_priv->reservation_sem);
 298 out_no_ttm_lock:
 299         drm_framebuffer_unreference(fb);
 300 out_no_fb:
 301         drm_modeset_unlock_all(dev);
 302 out_no_copy:
 303         kfree(clips);
 304 out_clips:
 305         return ret;
 306 }
 307
 308 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 309                                struct drm_file *file_priv)
 310 {
 311         struct vmw_private *dev_priv = vmw_priv(dev);
 312         struct drm_vmw_present_readback_arg *arg =
 313                 (struct drm_vmw_present_readback_arg *)data;
 314         struct drm_vmw_fence_rep __user *user_fence_rep =
 315                 (struct drm_vmw_fence_rep __user *)
 316                 (unsigned long)arg->fence_rep;
 317         struct drm_vmw_rect __user *clips_ptr;
 318         struct drm_vmw_rect *clips = NULL;
 319         struct drm_framebuffer *fb;
 320         struct vmw_framebuffer *vfb;
 321         uint32_t num_clips;
 322         int ret;
 323
 324         num_clips = arg->num_clips;
 325         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 326
 327         if (unlikely(num_clips == 0))
 328                 return 0;
 329
 330         if (clips_ptr == NULL) {
 331                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 332                 ret = -EINVAL;
 333                 goto out_clips;
 334         }
 335
 336         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 337         if (clips == NULL) {
 338                 DRM_ERROR("Failed to allocate clip rect list.\n");
 339                 ret = -ENOMEM;
 340                 goto out_clips;
 341         }
 342
 343         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 344         if (ret) {
 345                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 346                 ret = -EFAULT;
 347                 goto out_no_copy;
 348         }
 349
 350         drm_modeset_lock_all(dev);
 351
 352         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 353         if (!fb) {
 354                 DRM_ERROR("Invalid framebuffer id.\n");
 355                 ret = -ENOENT;
 356                 goto out_no_fb;
 357         }
 358
 359         vfb = vmw_framebuffer_to_vfb(fb);
 360         if (!vfb->dmabuf) {
 361                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 362                 ret = -EINVAL;
 363                 goto out_no_ttm_lock;
 364         }
 365
 366         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 367         if (unlikely(ret != 0))
 368                 goto out_no_ttm_lock;
 369
 370         ret = vmw_kms_readback(dev_priv, file_priv,
 371                                vfb, user_fence_rep,
 372                                clips, num_clips);
 373
 374         ttm_read_unlock(&dev_priv->reservation_sem);
 375 out_no_ttm_lock:
 376         drm_framebuffer_unreference(fb);
 377 out_no_fb:
 378         drm_modeset_unlock_all(dev);
 379 out_no_copy:
 380         kfree(clips);
 381 out_clips:
 382         return ret;
 383 }
 384
 385
 386 /**
 387  * vmw_fops_poll - wrapper around the drm_poll function
 388  *
 389  * @filp: See the linux fops poll documentation.
 390  * @wait: See the linux fops poll documentation.
 391  *
 392  * Wrapper around the drm_poll function that makes sure the device is
 393  * processing the fifo if drm_poll decides to wait.
 394  */
 395 unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 396 {
 397         struct drm_file *file_priv = filp->private_data;
 398         struct vmw_private *dev_priv =
 399                 vmw_priv(file_priv->minor->dev);
 400
 401         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 402         return drm_poll(filp, wait);
 403 }
 404
 405
 406 /**
 407  * vmw_fops_read - wrapper around the drm_read function
 408  *
 409  * @filp: See the linux fops read documentation.
 410  * @buffer: See the linux fops read documentation.
 411  * @count: See the linux fops read documentation.
 412  * offset: See the linux fops read documentation.
 413  *
 414  * Wrapper around the drm_read function that makes sure the device is
 415  * processing the fifo if drm_read decides to wait.
 416  */
 417 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 418                       size_t count, loff_t *offset)
 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_read(filp, buffer, count, offset);
 426 }