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->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                 DRM_ERROR("Illegal vmwgfx get param request: %d\n",
  73                           param->param);
  74                 return -EINVAL;
  75         }
  76
  77         return 0;
  78 }
  79
  80
  81 int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
  82                          struct drm_file *file_priv)
  83 {
  84         struct drm_vmw_get_3d_cap_arg *arg =
  85                 (struct drm_vmw_get_3d_cap_arg *) data;
  86         struct vmw_private *dev_priv = vmw_priv(dev);
  87         uint32_t size;
  88         __le32 __iomem *fifo_mem;
  89         void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
  90         void *bounce;
  91         int ret;
  92
  93         if (unlikely(arg->pad64 != 0)) {
  94                 DRM_ERROR("Illegal GET_3D_CAP argument.\n");
  95                 return -EINVAL;
  96         }
  97
  98         size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) << 2;
  99
 100         if (arg->max_size < size)
 101                 size = arg->max_size;
 102
 103         bounce = vmalloc(size);
 104         if (unlikely(bounce == NULL)) {
 105                 DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
 106                 return -ENOMEM;
 107         }
 108
 109         fifo_mem = dev_priv->mmio_virt;
 110         memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
 111
 112         ret = copy_to_user(buffer, bounce, size);
 113         vfree(bounce);
 114
 115         if (unlikely(ret != 0))
 116                 DRM_ERROR("Failed to report 3D caps info.\n");
 117
 118         return ret;
 119 }
 120
 121 int vmw_present_ioctl(struct drm_device *dev, void *data,
 122                       struct drm_file *file_priv)
 123 {
 124         struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
 125         struct vmw_private *dev_priv = vmw_priv(dev);
 126         struct drm_vmw_present_arg *arg =
 127                 (struct drm_vmw_present_arg *)data;
 128         struct vmw_surface *surface;
 129         struct vmw_master *vmaster = vmw_master(file_priv->master);
 130         struct drm_vmw_rect __user *clips_ptr;
 131         struct drm_vmw_rect *clips = NULL;
 132         struct drm_mode_object *obj;
 133         struct vmw_framebuffer *vfb;
 134         uint32_t num_clips;
 135         int ret;
 136
 137         num_clips = arg->num_clips;
 138         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 139
 140         if (unlikely(num_clips == 0))
 141                 return 0;
 142
 143         if (clips_ptr == NULL) {
 144                 DRM_ERROR("Variable clips_ptr must be specified.\n");
 145                 ret = -EINVAL;
 146                 goto out_clips;
 147         }
 148
 149         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 150         if (clips == NULL) {
 151                 DRM_ERROR("Failed to allocate clip rect list.\n");
 152                 ret = -ENOMEM;
 153                 goto out_clips;
 154         }
 155
 156         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 157         if (ret) {
 158                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 159                 ret = -EFAULT;
 160                 goto out_no_copy;
 161         }
 162
 163         ret = mutex_lock_interruptible(&dev->mode_config.mutex);
 164         if (unlikely(ret != 0)) {
 165                 ret = -ERESTARTSYS;
 166                 goto out_no_mode_mutex;
 167         }
 168
 169         obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
 170         if (!obj) {
 171                 DRM_ERROR("Invalid framebuffer id.\n");
 172                 ret = -EINVAL;
 173                 goto out_no_fb;
 174         }
 175         vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
 176
 177         ret = ttm_read_lock(&vmaster->lock, true);
 178         if (unlikely(ret != 0))
 179                 goto out_no_ttm_lock;
 180
 181         ret = vmw_user_surface_lookup_handle(dev_priv, tfile, arg->sid,
 182                                              &surface);
 183         if (ret)
 184                 goto out_no_surface;
 185
 186         ret = vmw_kms_present(dev_priv, file_priv,
 187                               vfb, surface, arg->sid,
 188                               arg->dest_x, arg->dest_y,
 189                               clips, num_clips);
 190
 191         /* vmw_user_surface_lookup takes one ref so does new_fb */
 192         vmw_surface_unreference(&surface);
 193
 194 out_no_surface:
 195         ttm_read_unlock(&vmaster->lock);
 196 out_no_ttm_lock:
 197 out_no_fb:
 198         mutex_unlock(&dev->mode_config.mutex);
 199 out_no_mode_mutex:
 200 out_no_copy:
 201         kfree(clips);
 202 out_clips:
 203         return ret;
 204 }
 205
 206 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 207                                struct drm_file *file_priv)
 208 {
 209         struct vmw_private *dev_priv = vmw_priv(dev);
 210         struct drm_vmw_present_readback_arg *arg =
 211                 (struct drm_vmw_present_readback_arg *)data;
 212         struct drm_vmw_fence_rep __user *user_fence_rep =
 213                 (struct drm_vmw_fence_rep __user *)
 214                 (unsigned long)arg->fence_rep;
 215         struct vmw_master *vmaster = vmw_master(file_priv->master);
 216         struct drm_vmw_rect __user *clips_ptr;
 217         struct drm_vmw_rect *clips = NULL;
 218         struct drm_mode_object *obj;
 219         struct vmw_framebuffer *vfb;
 220         uint32_t num_clips;
 221         int ret;
 222
 223         num_clips = arg->num_clips;
 224         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 225
 226         if (unlikely(num_clips == 0))
 227                 return 0;
 228
 229         if (clips_ptr == NULL) {
 230                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 231                 ret = -EINVAL;
 232                 goto out_clips;
 233         }
 234
 235         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 236         if (clips == NULL) {
 237                 DRM_ERROR("Failed to allocate clip rect list.\n");
 238                 ret = -ENOMEM;
 239                 goto out_clips;
 240         }
 241
 242         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 243         if (ret) {
 244                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 245                 ret = -EFAULT;
 246                 goto out_no_copy;
 247         }
 248
 249         ret = mutex_lock_interruptible(&dev->mode_config.mutex);
 250         if (unlikely(ret != 0)) {
 251                 ret = -ERESTARTSYS;
 252                 goto out_no_mode_mutex;
 253         }
 254
 255         obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
 256         if (!obj) {
 257                 DRM_ERROR("Invalid framebuffer id.\n");
 258                 ret = -EINVAL;
 259                 goto out_no_fb;
 260         }
 261
 262         vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
 263         if (!vfb->dmabuf) {
 264                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 265                 ret = -EINVAL;
 266                 goto out_no_fb;
 267         }
 268
 269         ret = ttm_read_lock(&vmaster->lock, true);
 270         if (unlikely(ret != 0))
 271                 goto out_no_ttm_lock;
 272
 273         ret = vmw_kms_readback(dev_priv, file_priv,
 274                                vfb, user_fence_rep,
 275                                clips, num_clips);
 276
 277         ttm_read_unlock(&vmaster->lock);
 278 out_no_ttm_lock:
 279 out_no_fb:
 280         mutex_unlock(&dev->mode_config.mutex);
 281 out_no_mode_mutex:
 282 out_no_copy:
 283         kfree(clips);
 284 out_clips:
 285         return ret;
 286 }
 287
 288
 289 /**
 290  * vmw_fops_poll - wrapper around the drm_poll function
 291  *
 292  * @filp: See the linux fops poll documentation.
 293  * @wait: See the linux fops poll documentation.
 294  *
 295  * Wrapper around the drm_poll function that makes sure the device is
 296  * processing the fifo if drm_poll decides to wait.
 297  */
 298 unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 299 {
 300         struct drm_file *file_priv = filp->private_data;
 301         struct vmw_private *dev_priv =
 302                 vmw_priv(file_priv->minor->dev);
 303
 304         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 305         return drm_poll(filp, wait);
 306 }
 307
 308
 309 /**
 310  * vmw_fops_read - wrapper around the drm_read function
 311  *
 312  * @filp: See the linux fops read documentation.
 313  * @buffer: See the linux fops read documentation.
 314  * @count: See the linux fops read documentation.
 315  * offset: See the linux fops read documentation.
 316  *
 317  * Wrapper around the drm_read function that makes sure the device is
 318  * processing the fifo if drm_read decides to wait.
 319  */
 320 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 321                       size_t count, loff_t *offset)
 322 {
 323         struct drm_file *file_priv = filp->private_data;
 324         struct vmw_private *dev_priv =
 325                 vmw_priv(file_priv->minor->dev);
 326
 327         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 328         return drm_read(filp, buffer, count, offset);
 329 }