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_mode_object *obj;
 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         ret = mutex_lock_interruptible(&dev->mode_config.mutex);
 167         if (unlikely(ret != 0)) {
 168                 ret = -ERESTARTSYS;
 169                 goto out_no_mode_mutex;
 170         }
 171
 172         obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
 173         if (!obj) {
 174                 DRM_ERROR("Invalid framebuffer id.\n");
 175                 ret = -EINVAL;
 176                 goto out_no_fb;
 177         }
 178         vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
 179
 180         ret = ttm_read_lock(&vmaster->lock, true);
 181         if (unlikely(ret != 0))
 182                 goto out_no_ttm_lock;
 183
 184         ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
 185                                               user_surface_converter,
 186                                               &res);
 187         if (ret)
 188                 goto out_no_surface;
 189
 190         surface = vmw_res_to_srf(res);
 191         ret = vmw_kms_present(dev_priv, file_priv,
 192                               vfb, surface, arg->sid,
 193                               arg->dest_x, arg->dest_y,
 194                               clips, num_clips);
 195
 196         /* vmw_user_surface_lookup takes one ref so does new_fb */
 197         vmw_surface_unreference(&surface);
 198
 199 out_no_surface:
 200         ttm_read_unlock(&vmaster->lock);
 201 out_no_ttm_lock:
 202 out_no_fb:
 203         mutex_unlock(&dev->mode_config.mutex);
 204 out_no_mode_mutex:
 205 out_no_copy:
 206         kfree(clips);
 207 out_clips:
 208         return ret;
 209 }
 210
 211 int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 212                                struct drm_file *file_priv)
 213 {
 214         struct vmw_private *dev_priv = vmw_priv(dev);
 215         struct drm_vmw_present_readback_arg *arg =
 216                 (struct drm_vmw_present_readback_arg *)data;
 217         struct drm_vmw_fence_rep __user *user_fence_rep =
 218                 (struct drm_vmw_fence_rep __user *)
 219                 (unsigned long)arg->fence_rep;
 220         struct vmw_master *vmaster = vmw_master(file_priv->master);
 221         struct drm_vmw_rect __user *clips_ptr;
 222         struct drm_vmw_rect *clips = NULL;
 223         struct drm_mode_object *obj;
 224         struct vmw_framebuffer *vfb;
 225         uint32_t num_clips;
 226         int ret;
 227
 228         num_clips = arg->num_clips;
 229         clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
 230
 231         if (unlikely(num_clips == 0))
 232                 return 0;
 233
 234         if (clips_ptr == NULL) {
 235                 DRM_ERROR("Argument clips_ptr must be specified.\n");
 236                 ret = -EINVAL;
 237                 goto out_clips;
 238         }
 239
 240         clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
 241         if (clips == NULL) {
 242                 DRM_ERROR("Failed to allocate clip rect list.\n");
 243                 ret = -ENOMEM;
 244                 goto out_clips;
 245         }
 246
 247         ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
 248         if (ret) {
 249                 DRM_ERROR("Failed to copy clip rects from userspace.\n");
 250                 ret = -EFAULT;
 251                 goto out_no_copy;
 252         }
 253
 254         ret = mutex_lock_interruptible(&dev->mode_config.mutex);
 255         if (unlikely(ret != 0)) {
 256                 ret = -ERESTARTSYS;
 257                 goto out_no_mode_mutex;
 258         }
 259
 260         obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
 261         if (!obj) {
 262                 DRM_ERROR("Invalid framebuffer id.\n");
 263                 ret = -EINVAL;
 264                 goto out_no_fb;
 265         }
 266
 267         vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
 268         if (!vfb->dmabuf) {
 269                 DRM_ERROR("Framebuffer not dmabuf backed.\n");
 270                 ret = -EINVAL;
 271                 goto out_no_fb;
 272         }
 273
 274         ret = ttm_read_lock(&vmaster->lock, true);
 275         if (unlikely(ret != 0))
 276                 goto out_no_ttm_lock;
 277
 278         ret = vmw_kms_readback(dev_priv, file_priv,
 279                                vfb, user_fence_rep,
 280                                clips, num_clips);
 281
 282         ttm_read_unlock(&vmaster->lock);
 283 out_no_ttm_lock:
 284 out_no_fb:
 285         mutex_unlock(&dev->mode_config.mutex);
 286 out_no_mode_mutex:
 287 out_no_copy:
 288         kfree(clips);
 289 out_clips:
 290         return ret;
 291 }
 292
 293
 294 /**
 295  * vmw_fops_poll - wrapper around the drm_poll function
 296  *
 297  * @filp: See the linux fops poll documentation.
 298  * @wait: See the linux fops poll documentation.
 299  *
 300  * Wrapper around the drm_poll function that makes sure the device is
 301  * processing the fifo if drm_poll decides to wait.
 302  */
 303 unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
 304 {
 305         struct drm_file *file_priv = filp->private_data;
 306         struct vmw_private *dev_priv =
 307                 vmw_priv(file_priv->minor->dev);
 308
 309         vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
 310         return drm_poll(filp, wait);
 311 }
 312
 313
 314 /**
 315  * vmw_fops_read - wrapper around the drm_read function
 316  *
 317  * @filp: See the linux fops read documentation.
 318  * @buffer: See the linux fops read documentation.
 319  * @count: See the linux fops read documentation.
 320  * offset: See the linux fops read documentation.
 321  *
 322  * Wrapper around the drm_read function that makes sure the device is
 323  * processing the fifo if drm_read decides to wait.
 324  */
 325 ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
 326                       size_t count, loff_t *offset)
 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_read(filp, buffer, count, offset);
 334 }