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