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 "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->vram_size;
  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         default:
  72                 return -EINVAL;
  73         }
  74
  75         return 0;
  76 }
  77
  78
  79 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
  80                          struct drm_file *file_priv)
  81 {
  82         struct drm_vmw_get_3d_cap_arg *arg =
  83                 (struct drm_vmw_get_3d_cap_arg *) data;
  84         struct vmw_private *dev_priv = vmw_priv(dev);
  85         uint32_t size;
  86         __le32 __iomem *fifo_mem;
  87         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
  88         void *bounce;
  89         int ret;
  90
  91         if (unlikely(arg->pad64 != 0 || arg->max_size == 0)) {
  92                 DRM_ERROR("Illegal GET_3D_CAP argument.\n");
  93                 return -EINVAL;
  94         }
  95
  96         size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) << 2;
  97
  98         if (arg->max_size < size)
  99                 size = arg->max_size;
 100
 101         bounce = vmalloc(size);
 102         if (unlikely(bounce == NULL)) {
 103                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 104                 return -ENOMEM;
 105         }
 106
 107         fifo_mem = dev_priv->mmio_virt;
 108         memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 109
 110         ret = copy_to_user(buffer, bounce, size);
 111         vfree(bounce);
 112
 113         if (unlikely(ret != 0))
 114                 DRM_ERROR("Failed to report 3D caps info.\n");
 115
 116         return ret;
 117 }
 118
 119 int vmw_present_ioctl(struct drm_device *dev, void *data,
 120                       struct drm_file *file_priv)
 121 {
 122         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 123         struct vmw_private *dev_priv = vmw_priv(dev);
 124         struct drm_vmw_present_arg *arg =
 125                 (struct drm_vmw_present_arg *)data;
 126         struct vmw_surface *surface;
 127         struct vmw_master *vmaster = vmw_master(file_priv->master);
 128         struct drm_vmw_rect __user *clips_ptr;
 129         struct drm_vmw_rect *clips = NULL;
 130         struct drm_mode_object *obj;
 131         struct vmw_framebuffer *vfb;
 132         uint32_t num_clips;
 133         int ret;
 134
 135         num_clips = arg->num_clips;
 136         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 137
 138         if (unlikely(num_clips == 0))
 139                 return 0;
 140
 141         if (clips_ptr == NULL) {
 142                 DRM_ERROR("Variable clips_ptr must be specified.\n");
 143                 ret = -EINVAL;
 144                 goto out_clips;
 145         }
 146
 147         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 148         if (clips == NULL) {
 149                 DRM_ERROR("Failed to allocate clip rect list.\n");
 150                 ret = -ENOMEM;
 151                 goto out_clips;
 152         }
 153
 154         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 155         if (ret) {
 156                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 157                 ret = -EFAULT;
 158                 goto out_no_copy;
 159         }
 160
 161         ret = mutex_lock_interruptible(&dev->mode_config.mutex);
 162         if (unlikely(ret != 0)) {
 163                 ret = -ERESTARTSYS;
 164                 goto out_no_mode_mutex;
 165         }
 166
 167         obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
 168         if (!obj) {
 169                 DRM_ERROR("Invalid framebuffer id.\n");
 170                 ret = -EINVAL;
 171                 goto out_no_fb;
 172         }
 173         vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
 174
 175         ret = ttm_read_lock(&vmaster->lock, true);
 176         if (unlikely(ret != 0))
 177                 goto out_no_ttm_lock;
 178
 179         ret = vmw_user_surface_lookup_handle(dev_priv, tfile, arg->sid,
 180                                              &surface);
 181         if (ret)
 182                 goto out_no_surface;
 183
 184         ret = vmw_kms_present(dev_priv, file_priv,
 185                               vfb, surface, arg->sid,
 186                               arg->dest_x, arg->dest_y,
 187                               clips, num_clips);
 188
 189         /* vmw_user_surface_lookup takes one ref so does new_fb */
 190         vmw_surface_unreference(&surface);
 191
 192 out_no_surface:
 193         ttm_read_unlock(&vmaster->lock);
 194 out_no_ttm_lock:
 195 out_no_fb:
 196         mutex_unlock(&dev->mode_config.mutex);
 197 out_no_mode_mutex:
 198 out_no_copy:
 199         kfree(clips);
 200 out_clips:
 201         return ret;
 202 }
 203
 204 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 205                                struct drm_file *file_priv)
 206 {
 207         struct vmw_private *dev_priv = vmw_priv(dev);
 208         struct drm_vmw_present_readback_arg *arg =
 209                 (struct drm_vmw_present_readback_arg *)data;
 210         struct drm_vmw_fence_rep __user *user_fence_rep =
 211                 (struct drm_vmw_fence_rep __user *)
 212                 (unsigned long)arg->fence_rep;
 213         struct vmw_master *vmaster = vmw_master(file_priv->master);
 214         struct drm_vmw_rect __user *clips_ptr;
 215         struct drm_vmw_rect *clips = NULL;
 216         struct drm_mode_object *obj;
 217         struct vmw_framebuffer *vfb;
 218         uint32_t num_clips;
 219         int ret;
 220
 221         num_clips = arg->num_clips;
 222         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 223
 224         if (unlikely(num_clips == 0))
 225                 return 0;
 226
 227         if (clips_ptr == NULL) {
 228                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 229                 ret = -EINVAL;
 230                 goto out_clips;
 231         }
 232
 233         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 234         if (clips == NULL) {
 235                 DRM_ERROR("Failed to allocate clip rect list.\n");
 236                 ret = -ENOMEM;
 237                 goto out_clips;
 238         }
 239
 240         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 241         if (ret) {
 242                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 243                 ret = -EFAULT;
 244                 goto out_no_copy;
 245         }
 246
 247         ret = mutex_lock_interruptible(&dev->mode_config.mutex);
 248         if (unlikely(ret != 0)) {
 249                 ret = -ERESTARTSYS;
 250                 goto out_no_mode_mutex;
 251         }
 252
 253         obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
 254         if (!obj) {
 255                 DRM_ERROR("Invalid framebuffer id.\n");
 256                 ret = -EINVAL;
 257                 goto out_no_fb;
 258         }
 259
 260         vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
 261         if (!vfb->dmabuf) {
 262                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 263                 ret = -EINVAL;
 264                 goto out_no_fb;
 265         }
 266
 267         ret = ttm_read_lock(&vmaster->lock, true);
 268         if (unlikely(ret != 0))
 269                 goto out_no_ttm_lock;
 270
 271         ret = vmw_kms_readback(dev_priv, file_priv,
 272                                vfb, user_fence_rep,
 273                                clips, num_clips);
 274
 275         ttm_read_unlock(&vmaster->lock);
 276 out_no_ttm_lock:
 277 out_no_fb:
 278         mutex_unlock(&dev->mode_config.mutex);
 279 out_no_mode_mutex:
 280 out_no_copy:
 281         kfree(clips);
 282 out_clips:
 283         return ret;
 284 }
 285
 286
 287 /**
 288  * vmw_fops_poll - wrapper around the drm_poll function
 289  *
 290  * @filp: See the linux fops poll documentation.
 291  * @wait: See the linux fops poll documentation.
 292  *
 293  * Wrapper around the drm_poll function that makes sure the device is
 294  * processing the fifo if drm_poll decides to wait.
 295  */
 296 unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 297 {
 298         struct drm_file *file_priv = filp->private_data;
 299         struct vmw_private *dev_priv =
 300                 vmw_priv(file_priv->minor->dev);
 301
 302         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 303         return drm_poll(filp, wait);
 304 }
 305
 306
 307 /**
 308  * vmw_fops_read - wrapper around the drm_read function
 309  *
 310  * @filp: See the linux fops read documentation.
 311  * @buffer: See the linux fops read documentation.
 312  * @count: See the linux fops read documentation.
 313  * offset: See the linux fops read documentation.
 314  *
 315  * Wrapper around the drm_read function that makes sure the device is
 316  * processing the fifo if drm_read decides to wait.
 317  */
 318 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 319                       size_t count, loff_t *offset)
 320 {
 321         struct drm_file *file_priv = filp->private_data;
 322         struct vmw_private *dev_priv =
 323                 vmw_priv(file_priv->minor->dev);
 324
 325         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 326         return drm_read(filp, buffer, count, offset);
 327 }