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