Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 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" |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 29 | #include <drm/vmwgfx_drm.h> |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 30 | #include "vmwgfx_kms.h" |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 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: |
Jakob Bornecrantz | 8e19a95 | 2010-01-30 03:38:06 +0000 | [diff] [blame] | 47 | param->value = vmw_fifo_have_3d(dev_priv) ? 1 : 0; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 48 | break; |
Thomas Hellstrom | f77cef3 | 2010-02-09 19:41:55 +0000 | [diff] [blame] | 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; |
Thomas Hellstrom | 30f47fc8 | 2010-10-05 12:43:06 +0200 | [diff] [blame] | 55 | case DRM_VMW_PARAM_MAX_FB_SIZE: |
Thomas Hellstrom | bc2d650 | 2012-11-21 10:32:36 +0100 | [diff] [blame] | 56 | param->value = dev_priv->prim_bb_mem; |
Thomas Hellstrom | 30f47fc8 | 2010-10-05 12:43:06 +0200 | [diff] [blame] | 57 | break; |
Thomas Hellstrom | f63f6a5 | 2011-09-01 20:18:41 +0000 | [diff] [blame] | 58 | case DRM_VMW_PARAM_FIFO_HW_VERSION: |
| 59 | { |
| 60 | __le32 __iomem *fifo_mem = dev_priv->mmio_virt; |
Thomas Hellstrom | ebd4c6f | 2011-11-28 13:19:08 +0100 | [diff] [blame] | 61 | const struct vmw_fifo_state *fifo = &dev_priv->fifo; |
Thomas Hellstrom | f63f6a5 | 2011-09-01 20:18:41 +0000 | [diff] [blame] | 62 | |
Thomas Hellstrom | ebd4c6f | 2011-11-28 13:19:08 +0100 | [diff] [blame] | 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)); |
Thomas Hellstrom | f63f6a5 | 2011-09-01 20:18:41 +0000 | [diff] [blame] | 69 | break; |
| 70 | } |
Thomas Hellstrom | 716a2fd | 2012-11-21 10:37:20 +0100 | [diff] [blame] | 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; |
Thomas Hellstrom | 311474d | 2012-11-21 12:34:47 +0100 | [diff] [blame] | 82 | case DRM_VMW_PARAM_MAX_MOB_MEMORY: |
| 83 | param->value = dev_priv->max_mob_pages * PAGE_SIZE; |
| 84 | break; |
Jakob Bornecrantz | fb1d973 | 2009-12-10 00:19:58 +0000 | [diff] [blame] | 85 | default: |
| 86 | DRM_ERROR("Illegal vmwgfx get param request: %d\n", |
| 87 | param->param); |
| 88 | return -EINVAL; |
| 89 | } |
| 90 | |
| 91 | return 0; |
| 92 | } |
Thomas Hellstrom | f63f6a5 | 2011-09-01 20:18:41 +0000 | [diff] [blame] | 93 | |
| 94 | |
| 95 | int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data, |
| 96 | struct drm_file *file_priv) |
| 97 | { |
| 98 | struct drm_vmw_get_3d_cap_arg *arg = |
| 99 | (struct drm_vmw_get_3d_cap_arg *) data; |
| 100 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 101 | uint32_t size; |
| 102 | __le32 __iomem *fifo_mem; |
| 103 | void __user *buffer = (void __user *)((unsigned long)(arg->buffer)); |
| 104 | void *bounce; |
| 105 | int ret; |
Thomas Hellstrom | 716a2fd | 2012-11-21 10:37:20 +0100 | [diff] [blame] | 106 | bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS); |
Thomas Hellstrom | f63f6a5 | 2011-09-01 20:18:41 +0000 | [diff] [blame] | 107 | |
| 108 | if (unlikely(arg->pad64 != 0)) { |
| 109 | DRM_ERROR("Illegal GET_3D_CAP argument.\n"); |
| 110 | return -EINVAL; |
| 111 | } |
| 112 | |
Thomas Hellstrom | 716a2fd | 2012-11-21 10:37:20 +0100 | [diff] [blame] | 113 | if (gb_objects) |
| 114 | size = SVGA3D_DEVCAP_MAX; |
| 115 | else |
| 116 | size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1); |
| 117 | |
| 118 | size *= sizeof(uint32_t); |
Thomas Hellstrom | f63f6a5 | 2011-09-01 20:18:41 +0000 | [diff] [blame] | 119 | |
| 120 | if (arg->max_size < size) |
| 121 | size = arg->max_size; |
| 122 | |
| 123 | bounce = vmalloc(size); |
| 124 | if (unlikely(bounce == NULL)) { |
| 125 | DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n"); |
| 126 | return -ENOMEM; |
| 127 | } |
| 128 | |
Thomas Hellstrom | 716a2fd | 2012-11-21 10:37:20 +0100 | [diff] [blame] | 129 | if (gb_objects) { |
| 130 | int i; |
| 131 | uint32_t *bounce32 = (uint32_t *) bounce; |
| 132 | |
| 133 | mutex_lock(&dev_priv->hw_mutex); |
| 134 | for (i = 0; i < SVGA3D_DEVCAP_MAX; ++i) { |
| 135 | vmw_write(dev_priv, SVGA_REG_DEV_CAP, i); |
| 136 | *bounce32++ = vmw_read(dev_priv, SVGA_REG_DEV_CAP); |
| 137 | } |
| 138 | mutex_unlock(&dev_priv->hw_mutex); |
| 139 | |
| 140 | } else { |
| 141 | |
| 142 | fifo_mem = dev_priv->mmio_virt; |
| 143 | memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size); |
| 144 | } |
Thomas Hellstrom | f63f6a5 | 2011-09-01 20:18:41 +0000 | [diff] [blame] | 145 | |
| 146 | ret = copy_to_user(buffer, bounce, size); |
Dan Carpenter | 888155b | 2012-11-12 11:07:24 +0000 | [diff] [blame] | 147 | if (ret) |
| 148 | ret = -EFAULT; |
Thomas Hellstrom | f63f6a5 | 2011-09-01 20:18:41 +0000 | [diff] [blame] | 149 | vfree(bounce); |
| 150 | |
| 151 | if (unlikely(ret != 0)) |
| 152 | DRM_ERROR("Failed to report 3D caps info.\n"); |
| 153 | |
| 154 | return ret; |
| 155 | } |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 156 | |
| 157 | int vmw_present_ioctl(struct drm_device *dev, void *data, |
| 158 | struct drm_file *file_priv) |
| 159 | { |
| 160 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; |
| 161 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 162 | struct drm_vmw_present_arg *arg = |
| 163 | (struct drm_vmw_present_arg *)data; |
| 164 | struct vmw_surface *surface; |
| 165 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
| 166 | struct drm_vmw_rect __user *clips_ptr; |
| 167 | struct drm_vmw_rect *clips = NULL; |
Daniel Vetter | 786b99e | 2012-12-02 21:53:40 +0100 | [diff] [blame] | 168 | struct drm_framebuffer *fb; |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 169 | struct vmw_framebuffer *vfb; |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 170 | struct vmw_resource *res; |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 171 | uint32_t num_clips; |
| 172 | int ret; |
| 173 | |
| 174 | num_clips = arg->num_clips; |
| 175 | clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr; |
| 176 | |
| 177 | if (unlikely(num_clips == 0)) |
| 178 | return 0; |
| 179 | |
| 180 | if (clips_ptr == NULL) { |
| 181 | DRM_ERROR("Variable clips_ptr must be specified.\n"); |
| 182 | ret = -EINVAL; |
| 183 | goto out_clips; |
| 184 | } |
| 185 | |
Thomas Meyer | 24bb5a0 | 2011-11-29 22:08:00 +0100 | [diff] [blame] | 186 | clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 187 | if (clips == NULL) { |
| 188 | DRM_ERROR("Failed to allocate clip rect list.\n"); |
| 189 | ret = -ENOMEM; |
| 190 | goto out_clips; |
| 191 | } |
| 192 | |
| 193 | ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips)); |
| 194 | if (ret) { |
| 195 | DRM_ERROR("Failed to copy clip rects from userspace.\n"); |
Dan Carpenter | d2c184f | 2011-10-18 09:09:19 +0300 | [diff] [blame] | 196 | ret = -EFAULT; |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 197 | goto out_no_copy; |
| 198 | } |
| 199 | |
Daniel Vetter | bbe4b99 | 2012-12-02 01:48:38 +0100 | [diff] [blame] | 200 | drm_modeset_lock_all(dev); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 201 | |
Daniel Vetter | 786b99e | 2012-12-02 21:53:40 +0100 | [diff] [blame] | 202 | fb = drm_framebuffer_lookup(dev, arg->fb_id); |
| 203 | if (!fb) { |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 204 | DRM_ERROR("Invalid framebuffer id.\n"); |
Ville Syrjälä | 43789b9 | 2013-10-17 13:35:06 +0300 | [diff] [blame] | 205 | ret = -ENOENT; |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 206 | goto out_no_fb; |
| 207 | } |
Daniel Vetter | 786b99e | 2012-12-02 21:53:40 +0100 | [diff] [blame] | 208 | vfb = vmw_framebuffer_to_vfb(fb); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 209 | |
| 210 | ret = ttm_read_lock(&vmaster->lock, true); |
| 211 | if (unlikely(ret != 0)) |
| 212 | goto out_no_ttm_lock; |
| 213 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 214 | ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid, |
| 215 | user_surface_converter, |
| 216 | &res); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 217 | if (ret) |
| 218 | goto out_no_surface; |
| 219 | |
Thomas Hellstrom | c0951b7 | 2012-11-20 12:19:35 +0000 | [diff] [blame] | 220 | surface = vmw_res_to_srf(res); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 221 | ret = vmw_kms_present(dev_priv, file_priv, |
| 222 | vfb, surface, arg->sid, |
| 223 | arg->dest_x, arg->dest_y, |
| 224 | clips, num_clips); |
| 225 | |
| 226 | /* vmw_user_surface_lookup takes one ref so does new_fb */ |
| 227 | vmw_surface_unreference(&surface); |
| 228 | |
| 229 | out_no_surface: |
| 230 | ttm_read_unlock(&vmaster->lock); |
| 231 | out_no_ttm_lock: |
Daniel Vetter | 2fd5eab | 2012-12-11 16:28:34 +0100 | [diff] [blame] | 232 | drm_framebuffer_unreference(fb); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 233 | out_no_fb: |
Daniel Vetter | bbe4b99 | 2012-12-02 01:48:38 +0100 | [diff] [blame] | 234 | drm_modeset_unlock_all(dev); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 235 | out_no_copy: |
| 236 | kfree(clips); |
| 237 | out_clips: |
| 238 | return ret; |
| 239 | } |
| 240 | |
| 241 | int vmw_present_readback_ioctl(struct drm_device *dev, void *data, |
| 242 | struct drm_file *file_priv) |
| 243 | { |
| 244 | struct vmw_private *dev_priv = vmw_priv(dev); |
| 245 | struct drm_vmw_present_readback_arg *arg = |
| 246 | (struct drm_vmw_present_readback_arg *)data; |
| 247 | struct drm_vmw_fence_rep __user *user_fence_rep = |
| 248 | (struct drm_vmw_fence_rep __user *) |
| 249 | (unsigned long)arg->fence_rep; |
| 250 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
| 251 | struct drm_vmw_rect __user *clips_ptr; |
| 252 | struct drm_vmw_rect *clips = NULL; |
Daniel Vetter | 786b99e | 2012-12-02 21:53:40 +0100 | [diff] [blame] | 253 | struct drm_framebuffer *fb; |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 254 | struct vmw_framebuffer *vfb; |
| 255 | uint32_t num_clips; |
| 256 | int ret; |
| 257 | |
| 258 | num_clips = arg->num_clips; |
| 259 | clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr; |
| 260 | |
| 261 | if (unlikely(num_clips == 0)) |
| 262 | return 0; |
| 263 | |
| 264 | if (clips_ptr == NULL) { |
| 265 | DRM_ERROR("Argument clips_ptr must be specified.\n"); |
| 266 | ret = -EINVAL; |
| 267 | goto out_clips; |
| 268 | } |
| 269 | |
Thomas Meyer | 24bb5a0 | 2011-11-29 22:08:00 +0100 | [diff] [blame] | 270 | clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 271 | if (clips == NULL) { |
| 272 | DRM_ERROR("Failed to allocate clip rect list.\n"); |
| 273 | ret = -ENOMEM; |
| 274 | goto out_clips; |
| 275 | } |
| 276 | |
| 277 | ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips)); |
| 278 | if (ret) { |
| 279 | DRM_ERROR("Failed to copy clip rects from userspace.\n"); |
Dan Carpenter | d2c184f | 2011-10-18 09:09:19 +0300 | [diff] [blame] | 280 | ret = -EFAULT; |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 281 | goto out_no_copy; |
| 282 | } |
| 283 | |
Daniel Vetter | bbe4b99 | 2012-12-02 01:48:38 +0100 | [diff] [blame] | 284 | drm_modeset_lock_all(dev); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 285 | |
Daniel Vetter | 786b99e | 2012-12-02 21:53:40 +0100 | [diff] [blame] | 286 | fb = drm_framebuffer_lookup(dev, arg->fb_id); |
| 287 | if (!fb) { |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 288 | DRM_ERROR("Invalid framebuffer id.\n"); |
Ville Syrjälä | 43789b9 | 2013-10-17 13:35:06 +0300 | [diff] [blame] | 289 | ret = -ENOENT; |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 290 | goto out_no_fb; |
| 291 | } |
| 292 | |
Daniel Vetter | 786b99e | 2012-12-02 21:53:40 +0100 | [diff] [blame] | 293 | vfb = vmw_framebuffer_to_vfb(fb); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 294 | if (!vfb->dmabuf) { |
| 295 | DRM_ERROR("Framebuffer not dmabuf backed.\n"); |
| 296 | ret = -EINVAL; |
Daniel Vetter | 2fd5eab | 2012-12-11 16:28:34 +0100 | [diff] [blame] | 297 | goto out_no_ttm_lock; |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | ret = ttm_read_lock(&vmaster->lock, true); |
| 301 | if (unlikely(ret != 0)) |
| 302 | goto out_no_ttm_lock; |
| 303 | |
| 304 | ret = vmw_kms_readback(dev_priv, file_priv, |
| 305 | vfb, user_fence_rep, |
| 306 | clips, num_clips); |
| 307 | |
| 308 | ttm_read_unlock(&vmaster->lock); |
| 309 | out_no_ttm_lock: |
Daniel Vetter | 2fd5eab | 2012-12-11 16:28:34 +0100 | [diff] [blame] | 310 | drm_framebuffer_unreference(fb); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 311 | out_no_fb: |
Daniel Vetter | bbe4b99 | 2012-12-02 01:48:38 +0100 | [diff] [blame] | 312 | drm_modeset_unlock_all(dev); |
Jakob Bornecrantz | 2fcd5a7 | 2011-10-04 20:13:26 +0200 | [diff] [blame] | 313 | out_no_copy: |
| 314 | kfree(clips); |
| 315 | out_clips: |
| 316 | return ret; |
| 317 | } |
Thomas Hellstrom | 5438ae8 | 2011-10-10 12:23:27 +0200 | [diff] [blame] | 318 | |
| 319 | |
| 320 | /** |
| 321 | * vmw_fops_poll - wrapper around the drm_poll function |
| 322 | * |
| 323 | * @filp: See the linux fops poll documentation. |
| 324 | * @wait: See the linux fops poll documentation. |
| 325 | * |
| 326 | * Wrapper around the drm_poll function that makes sure the device is |
| 327 | * processing the fifo if drm_poll decides to wait. |
| 328 | */ |
| 329 | unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait) |
| 330 | { |
| 331 | struct drm_file *file_priv = filp->private_data; |
| 332 | struct vmw_private *dev_priv = |
| 333 | vmw_priv(file_priv->minor->dev); |
| 334 | |
| 335 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); |
| 336 | return drm_poll(filp, wait); |
| 337 | } |
| 338 | |
| 339 | |
| 340 | /** |
| 341 | * vmw_fops_read - wrapper around the drm_read function |
| 342 | * |
| 343 | * @filp: See the linux fops read documentation. |
| 344 | * @buffer: See the linux fops read documentation. |
| 345 | * @count: See the linux fops read documentation. |
| 346 | * offset: See the linux fops read documentation. |
| 347 | * |
| 348 | * Wrapper around the drm_read function that makes sure the device is |
| 349 | * processing the fifo if drm_read decides to wait. |
| 350 | */ |
| 351 | ssize_t vmw_fops_read(struct file *filp, char __user *buffer, |
| 352 | size_t count, loff_t *offset) |
| 353 | { |
| 354 | struct drm_file *file_priv = filp->private_data; |
| 355 | struct vmw_private *dev_priv = |
| 356 | vmw_priv(file_priv->minor->dev); |
| 357 | |
| 358 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); |
| 359 | return drm_read(filp, buffer, count, offset); |
| 360 | } |