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 #include "device_include/svga3d_caps.h"
  32
  33 struct svga_3d_compat_cap {
  34         SVGA3dCapsRecordHeader header;
  35         SVGA3dCapPair pairs[SVGA3D_DEVCAP_MAX];
  36 };
  37
  38 int 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 __iomem *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                         ioread32(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                 DRM_ERROR("Illegal vmwgfx get param request: %d\n",
 118                           param->param);
 119                 return -EINVAL;
 120         }
 121
 122         return 0;
 123 }
 124
 125 static int vmw_fill_compat_cap(struct vmw_private *dev_priv, void *bounce,
 126                                size_t size)
 127 {
 128         struct svga_3d_compat_cap *compat_cap =
 129                 (struct svga_3d_compat_cap *) bounce;
 130         unsigned int i;
 131         size_t pair_offset = offsetof(struct svga_3d_compat_cap, pairs);
 132         unsigned int max_size;
 133
 134         if (size < pair_offset)
 135                 return -EINVAL;
 136
 137         max_size = (size - pair_offset) / sizeof(SVGA3dCapPair);
 138
 139         if (max_size > SVGA3D_DEVCAP_MAX)
 140                 max_size = SVGA3D_DEVCAP_MAX;
 141
 142         compat_cap->header.length =
 143                 (pair_offset + max_size * sizeof(SVGA3dCapPair)) / sizeof(u32);
 144         compat_cap->header.type = SVGA3DCAPS_RECORD_DEVCAPS;
 145
 146         spin_lock(&dev_priv->cap_lock);
 147         for (i = 0; i < max_size; ++i) {
 148                 vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 149                 compat_cap->pairs[i][0] = i;
 150                 compat_cap->pairs[i][1] = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
 151         }
 152         spin_unlock(&dev_priv->cap_lock);
 153
 154         return 0;
 155 }
 156
 157
 158 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
 159                          struct drm_file *file_priv)
 160 {
 161         struct drm_vmw_get_3d_cap_arg *arg =
 162                 (struct drm_vmw_get_3d_cap_arg *) data;
 163         struct vmw_private *dev_priv = vmw_priv(dev);
 164         uint32_t size;
 165         u32 __iomem *fifo_mem;
 166         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
 167         void *bounce;
 168         int ret;
 169         bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
 170         struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
 171
 172         if (unlikely(arg->pad64 != 0)) {
 173                 DRM_ERROR("Illegal GET_3D_CAP argument.\n");
 174                 return -EINVAL;
 175         }
 176
 177         if (gb_objects && vmw_fp->gb_aware)
 178                 size = SVGA3D_DEVCAP_MAX * sizeof(uint32_t);
 179         else if (gb_objects)
 180                 size = sizeof(struct svga_3d_compat_cap) + sizeof(uint32_t);
 181         else
 182                 size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) *
 183                         sizeof(uint32_t);
 184
 185         if (arg->max_size < size)
 186                 size = arg->max_size;
 187
 188         bounce = vzalloc(size);
 189         if (unlikely(bounce == NULL)) {
 190                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 191                 return -ENOMEM;
 192         }
 193
 194         if (gb_objects && vmw_fp->gb_aware) {
 195                 int i, num;
 196                 uint32_t *bounce32 = (uint32_t *) bounce;
 197
 198                 num = size / sizeof(uint32_t);
 199                 if (num > SVGA3D_DEVCAP_MAX)
 200                         num = SVGA3D_DEVCAP_MAX;
 201
 202                 spin_lock(&dev_priv->cap_lock);
 203                 for (i = 0; i < num; ++i) {
 204                         vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
 205                         *bounce32++ = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
 206                 }
 207                 spin_unlock(&dev_priv->cap_lock);
 208         } else if (gb_objects) {
 209                 ret = vmw_fill_compat_cap(dev_priv, bounce, size);
 210                 if (unlikely(ret != 0))
 211                         goto out_err;
 212         } else {
 213                 fifo_mem = dev_priv->mmio_virt;
 214                 memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 215         }
 216
 217         ret = copy_to_user(buffer, bounce, size);
 218         if (ret)
 219                 ret = -EFAULT;
 220 out_err:
 221         vfree(bounce);
 222
 223         if (unlikely(ret != 0))
 224                 DRM_ERROR("Failed to report 3D caps info.\n");
 225
 226         return ret;
 227 }
 228
 229 int vmw_present_ioctl(struct drm_device *dev, void *data,
 230                       struct drm_file *file_priv)
 231 {
 232         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 233         struct vmw_private *dev_priv = vmw_priv(dev);
 234         struct drm_vmw_present_arg *arg =
 235                 (struct drm_vmw_present_arg *)data;
 236         struct vmw_surface *surface;
 237         struct drm_vmw_rect __user *clips_ptr;
 238         struct drm_vmw_rect *clips = NULL;
 239         struct drm_framebuffer *fb;
 240         struct vmw_framebuffer *vfb;
 241         struct vmw_resource *res;
 242         uint32_t num_clips;
 243         int ret;
 244
 245         num_clips = arg->num_clips;
 246         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 247
 248         if (unlikely(num_clips == 0))
 249                 return 0;
 250
 251         if (clips_ptr == NULL) {
 252                 DRM_ERROR("Variable clips_ptr must be specified.\n");
 253                 ret = -EINVAL;
 254                 goto out_clips;
 255         }
 256
 257         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 258         if (clips == NULL) {
 259                 DRM_ERROR("Failed to allocate clip rect list.\n");
 260                 ret = -ENOMEM;
 261                 goto out_clips;
 262         }
 263
 264         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 265         if (ret) {
 266                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 267                 ret = -EFAULT;
 268                 goto out_no_copy;
 269         }
 270
 271         drm_modeset_lock_all(dev);
 272
 273         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 274         if (!fb) {
 275                 DRM_ERROR("Invalid framebuffer id.\n");
 276                 ret = -ENOENT;
 277                 goto out_no_fb;
 278         }
 279         vfb = vmw_framebuffer_to_vfb(fb);
 280
 281         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 282         if (unlikely(ret != 0))
 283                 goto out_no_ttm_lock;
 284
 285         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 286                                               user_surface_converter,
 287                                               &res);
 288         if (ret)
 289                 goto out_no_surface;
 290
 291         surface = vmw_res_to_srf(res);
 292         ret = vmw_kms_present(dev_priv, file_priv,
 293                               vfb, surface, arg->sid,
 294                               arg->dest_x, arg->dest_y,
 295                               clips, num_clips);
 296
 297         /* vmw_user_surface_lookup takes one ref so does new_fb */
 298         vmw_surface_unreference(&surface);
 299
 300 out_no_surface:
 301         ttm_read_unlock(&dev_priv->reservation_sem);
 302 out_no_ttm_lock:
 303         drm_framebuffer_unreference(fb);
 304 out_no_fb:
 305         drm_modeset_unlock_all(dev);
 306 out_no_copy:
 307         kfree(clips);
 308 out_clips:
 309         return ret;
 310 }
 311
 312 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 313                                struct drm_file *file_priv)
 314 {
 315         struct vmw_private *dev_priv = vmw_priv(dev);
 316         struct drm_vmw_present_readback_arg *arg =
 317                 (struct drm_vmw_present_readback_arg *)data;
 318         struct drm_vmw_fence_rep __user *user_fence_rep =
 319                 (struct drm_vmw_fence_rep __user *)
 320                 (unsigned long)arg->fence_rep;
 321         struct drm_vmw_rect __user *clips_ptr;
 322         struct drm_vmw_rect *clips = NULL;
 323         struct drm_framebuffer *fb;
 324         struct vmw_framebuffer *vfb;
 325         uint32_t num_clips;
 326         int ret;
 327
 328         num_clips = arg->num_clips;
 329         clips_ptr = (struct drm_vmw_rect __user *)(unsigned long)arg->clips_ptr;
 330
 331         if (unlikely(num_clips == 0))
 332                 return 0;
 333
 334         if (clips_ptr == NULL) {
 335                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 336                 ret = -EINVAL;
 337                 goto out_clips;
 338         }
 339
 340         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 341         if (clips == NULL) {
 342                 DRM_ERROR("Failed to allocate clip rect list.\n");
 343                 ret = -ENOMEM;
 344                 goto out_clips;
 345         }
 346
 347         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 348         if (ret) {
 349                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 350                 ret = -EFAULT;
 351                 goto out_no_copy;
 352         }
 353
 354         drm_modeset_lock_all(dev);
 355
 356         fb = drm_framebuffer_lookup(dev, arg->fb_id);
 357         if (!fb) {
 358                 DRM_ERROR("Invalid framebuffer id.\n");
 359                 ret = -ENOENT;
 360                 goto out_no_fb;
 361         }
 362
 363         vfb = vmw_framebuffer_to_vfb(fb);
 364         if (!vfb->dmabuf) {
 365                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 366                 ret = -EINVAL;
 367                 goto out_no_ttm_lock;
 368         }
 369
 370         ret = ttm_read_lock(&dev_priv->reservation_sem, true);
 371         if (unlikely(ret != 0))
 372                 goto out_no_ttm_lock;
 373
 374         ret = vmw_kms_readback(dev_priv, file_priv,
 375                                vfb, user_fence_rep,
 376                                clips, num_clips);
 377
 378         ttm_read_unlock(&dev_priv->reservation_sem);
 379 out_no_ttm_lock:
 380         drm_framebuffer_unreference(fb);
 381 out_no_fb:
 382         drm_modeset_unlock_all(dev);
 383 out_no_copy:
 384         kfree(clips);
 385 out_clips:
 386         return ret;
 387 }
 388
 389
 390 /**
 391  * vmw_fops_poll - wrapper around the drm_poll function
 392  *
 393  * @filp: See the linux fops poll documentation.
 394  * @wait: See the linux fops poll documentation.
 395  *
 396  * Wrapper around the drm_poll function that makes sure the device is
 397  * processing the fifo if drm_poll decides to wait.
 398  */
 399 unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 400 {
 401         struct drm_file *file_priv = filp->private_data;
 402         struct vmw_private *dev_priv =
 403                 vmw_priv(file_priv->minor->dev);
 404
 405         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 406         return drm_poll(filp, wait);
 407 }
 408
 409
 410 /**
 411  * vmw_fops_read - wrapper around the drm_read function
 412  *
 413  * @filp: See the linux fops read documentation.
 414  * @buffer: See the linux fops read documentation.
 415  * @count: See the linux fops read documentation.
 416  * offset: See the linux fops read documentation.
 417  *
 418  * Wrapper around the drm_read function that makes sure the device is
 419  * processing the fifo if drm_read decides to wait.
 420  */
 421 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 422                       size_t count, loff_t *offset)
 423 {
 424         struct drm_file *file_priv = filp->private_data;
 425         struct vmw_private *dev_priv =
 426                 vmw_priv(file_priv->minor->dev);
 427
 428         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 429         return drm_read(filp, buffer, count, offset);
 430 }