diff options
Diffstat (limited to 'sys/dev/pci/drm/i915_drv.c')
| -rw-r--r-- | sys/dev/pci/drm/i915_drv.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sys/dev/pci/drm/i915_drv.c b/sys/dev/pci/drm/i915_drv.c index 3a63b4d29e9..96ec2ce995a 100644 --- a/sys/dev/pci/drm/i915_drv.c +++ b/sys/dev/pci/drm/i915_drv.c @@ -244,3 +244,25 @@ inteldrm_ioctl(struct drm_device *dev, u_long cmd, caddr_t data, } return (EINVAL); } + +u_int32_t +inteldrm_read_hws(struct drm_i915_private *dev_priv, int reg) +{ + struct drm_device *dev = (struct drm_device *)dev_priv->drmdev; + u_int32_t val; + + /* + * When we eventually go GEM only we'll always have a dmamap, so this + * madness won't be for long. + */ + if (dev_priv->hws_dmamem) + bus_dmamap_sync(dev->dmat, dev_priv->hws_dmamem->map, 0, + PAGE_SIZE, BUS_DMASYNC_POSTREAD); + + val = ((volatile u_int32_t *)(dev_priv->hw_status_page))[reg]; + + if (dev_priv->hws_dmamem) + bus_dmamap_sync(dev->dmat, dev_priv->hws_dmamem->map, 0, + PAGE_SIZE, BUS_DMASYNC_PREREAD); + return (val); +} |