resync to git master

This reverts a private patch which is causing issues with many Intel chipsets.
I will review that patch and see what we need to do to fix it up later, but
for the time being, we will just get these chips working again.

This update contains a lot of code cleanup and is post gem merge
(no, we don't have gem support).  It should prove much easier to read the
code now.  A lot of thanks goes to vehemens for that work.  I have adapted
the code to use cdevpriv for tracking per open file data.  That alleviates
the old ugly hack that we used to try and accomplish the task and helped to
clean up the open / close behavior a good bit.  This also replaces the hack
that was put in place a year or so ago to prevent radeons from locking up
with AIGLX enabled.  I have had a couple of radeon testers report that it
still works as expected, though I no longer have radeon hardware to test with
myself.  Other various fixes from the linux crew and Intel, many of
which are muddled in with the gem merge.

Approved by:	jhb (mentor)
Obtained from:	mesa/drm git master
MFC after:	2 weeks

1 files changed, 2 insertions, 25 deletions

diff --git a/sys/dev/drm/drm_pci.c b/sys/dev/drm/drm_pci.c
index 4aa6d03..7f8bc9f 100644
--- a/sys/dev/drm/drm_pci.c
+++ b/sys/dev/drm/drm_pci.c
@@ -37,7 +37,6 @@ __FBSDID("$FreeBSD$");
 /** \name PCI memory */
 /*@{*/
 
-#if defined(__FreeBSD__)
 static void
 drm_pci_busdma_callback(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
 {
@@ -49,7 +48,6 @@ drm_pci_busdma_callback(void *arg, bus_dma_segment_t *segs, int nsegs, int error
 	KASSERT(nsegs == 1, ("drm_pci_busdma_callback: bad dma segment count"));
 	dmah->busaddr = segs[0].ds_addr;
 }
-#endif
 
 /**
  * \brief Allocate a physically contiguous DMA-accessible consistent 
@@ -73,10 +71,11 @@ drm_pci_alloc(struct drm_device *dev, size_t size,
 	if (dmah == NULL)
 		return NULL;
 
-#ifdef __FreeBSD__
 	/* Make sure we aren't holding locks here */
+	mtx_assert(&dev->dev_lock, MA_NOTOWNED);
 	if (mtx_owned(&dev->dev_lock))
 	    DRM_ERROR("called while holding dev_lock\n");
+	mtx_assert(&dev->dma_lock, MA_NOTOWNED);
 	if (mtx_owned(&dev->dma_lock))
 	    DRM_ERROR("called while holding dma_lock\n");
 
@@ -107,24 +106,6 @@ drm_pci_alloc(struct drm_device *dev, size_t size,
 		free(dmah, M_DRM);
 		return NULL;
 	}
-#elif defined(__NetBSD__)
-	ret = bus_dmamem_alloc(dev->dma_tag, size, align, PAGE_SIZE,
-	    &dmah->seg, 1, &nsegs, BUS_DMA_NOWAIT);
-	if ((ret != 0) || (nsegs != 1)) {
-		free(dmah, M_DRM);
-		return NULL;
-	}
-
-	ret = bus_dmamem_map(dev->dma_tag, &dmah->seg, 1, size, &dmah->addr,
-	    BUS_DMA_NOWAIT);
-	if (ret != 0) {
-		bus_dmamem_free(dev->dma_tag, &dmah->seg, 1);
-		free(dmah, M_DRM);
-		return NULL;
-	}
-
-	dmah->dmaaddr = h->seg.ds_addr;
-#endif
 
 	return dmah;
 }
@@ -138,12 +119,8 @@ drm_pci_free(struct drm_device *dev, drm_dma_handle_t *dmah)
 	if (dmah == NULL)
 		return;
 
-#if defined(__FreeBSD__)
 	bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
 	bus_dma_tag_destroy(dmah->tag);
-#elif defined(__NetBSD__)
-	bus_dmamem_free(dev->dma_tag, &dmah->seg, 1);
-#endif
 
 	free(dmah, M_DRM);
 }