Merge branch 'master' into crestline

Conflicts:

	shared-core/i915_dma.c

1 files changed, 145 insertions, 0 deletions

diff --git a/linux-core/drm_ttm.h b/linux-core/drm_ttm.h
new file mode 100644
index 00000000..11a13754
--- /dev/null
+++ b/linux-core/drm_ttm.h
@@ -0,0 +1,145 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * 
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
+ */
+
+#ifndef _DRM_TTM_H
+#define _DRM_TTM_H
+#define DRM_HAS_TTM
+
+/*
+ * The backend GART interface. (In our case AGP). Any similar type of device (PCIE?)
+ * needs only to implement these functions to be usable with the "TTM" interface.
+ * The AGP backend implementation lives in drm_agpsupport.c 
+ * basically maps these calls to available functions in agpgart. Each drm device driver gets an
+ * additional function pointer that creates these types, 
+ * so that the device can choose the correct aperture.
+ * (Multiple AGP apertures, etc.) 
+ * Most device drivers will let this point to the standard AGP implementation.
+ */
+
+#define DRM_BE_FLAG_NEEDS_FREE     0x00000001
+#define DRM_BE_FLAG_BOUND_CACHED   0x00000002
+#define DRM_BE_FLAG_CBA            0x00000004
+
+typedef struct drm_ttm_backend {
+	unsigned long aperture_base;
+	void *private;
+	uint32_t flags;
+	uint32_t drm_map_type;
+	int (*needs_ub_cache_adjust) (struct drm_ttm_backend * backend);
+	int (*populate) (struct drm_ttm_backend * backend,
+			 unsigned long num_pages, struct page ** pages);
+	void (*clear) (struct drm_ttm_backend * backend);
+	int (*bind) (struct drm_ttm_backend * backend,
+		     unsigned long offset, int cached);
+	int (*unbind) (struct drm_ttm_backend * backend);
+	void (*destroy) (struct drm_ttm_backend * backend);
+} drm_ttm_backend_t;
+
+typedef struct drm_ttm {
+	struct page **pages;
+	uint32_t page_flags;
+	unsigned long num_pages;
+	unsigned long aper_offset;
+	atomic_t vma_count;
+	struct drm_device *dev;
+	int destroy;
+	uint32_t mapping_offset;
+	drm_ttm_backend_t *be;
+	enum {
+		ttm_bound,
+		ttm_evicted,
+		ttm_unbound,
+		ttm_unpopulated,
+	} state;
+#ifdef DRM_ODD_MM_COMPAT
+	struct list_head vma_list;
+	struct list_head p_mm_list;
+#endif
+
+} drm_ttm_t;
+
+typedef struct drm_ttm_object {
+	atomic_t usage;
+	uint32_t flags;
+	drm_map_list_t map_list;
+} drm_ttm_object_t;
+
+extern int drm_ttm_object_create(struct drm_device *dev, unsigned long size,
+				 uint32_t flags,
+				 drm_ttm_object_t ** ttm_object);
+extern void drm_ttm_object_deref_locked(struct drm_device *dev,
+					drm_ttm_object_t * to);
+extern void drm_ttm_object_deref_unlocked(struct drm_device *dev,
+					  drm_ttm_object_t * to);
+extern drm_ttm_object_t *drm_lookup_ttm_object(drm_file_t * priv,
+					       uint32_t handle,
+					       int check_owner);
+extern int drm_bind_ttm(drm_ttm_t * ttm, int cached, unsigned long aper_offset);
+
+extern int drm_unbind_ttm(drm_ttm_t * ttm);
+
+/*
+ * Evict a ttm region. Keeps Aperture caching policy.
+ */
+
+extern int drm_evict_ttm(drm_ttm_t * ttm);
+extern void drm_fixup_ttm_caching(drm_ttm_t * ttm);
+
+/*
+ * Destroy a ttm. The user normally calls drmRmMap or a similar IOCTL to do this, 
+ * which calls this function iff there are no vmas referencing it anymore. Otherwise it is called
+ * when the last vma exits.
+ */
+
+extern int drm_destroy_ttm(drm_ttm_t * ttm);
+extern int drm_ttm_ioctl(DRM_IOCTL_ARGS);
+
+static __inline__ drm_ttm_t *drm_ttm_from_object(drm_ttm_object_t * to)
+{
+	return (drm_ttm_t *) to->map_list.map->offset;
+}
+
+#define DRM_MASK_VAL(dest, mask, val)			\
+  (dest) = ((dest) & ~(mask)) | ((val) & (mask));
+
+#define DRM_TTM_MASK_FLAGS ((1 << PAGE_SHIFT) - 1)
+#define DRM_TTM_MASK_PFN (0xFFFFFFFFU - DRM_TTM_MASK_FLAGS)
+
+/*
+ * Page flags.
+ */
+
+#define DRM_TTM_PAGE_UNCACHED 0x01
+#define DRM_TTM_PAGE_USED     0x02
+#define DRM_TTM_PAGE_BOUND    0x04
+#define DRM_TTM_PAGE_PRESENT  0x08
+
+#endif