LXR linux/drivers/gpu/drm/vmwgfx/vmwgfx

   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
  32int 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
  81int 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
 121int 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
 194out_no_surface:
 195        ttm_read_unlock(&vmaster->lock);
 196out_no_ttm_lock:
 197out_no_fb:
 198        mutex_unlock(&dev->mode_config.mutex);
 199out_no_mode_mutex:
 200out_no_copy:
 201        kfree(clips);
 202out_clips:
 203        return ret;
 204}
 205
 206int 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);
 278out_no_ttm_lock:
 279out_no_fb:
 280        mutex_unlock(&dev->mode_config.mutex);
 281out_no_mode_mutex:
 282out_no_copy:
 283        kfree(clips);
 284out_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 */
 298unsigned 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 */
 320ssize_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}
 330