Hacking towards hooking up execbuffer.

linux-core/Makefile.kernel

@@ -20,7 +20,7 @@ r128-objs   := r128_drv.o r128_cce.o r128_state.o r128_irq.o
 mga-objs    := mga_drv.o mga_dma.o mga_state.o mga_warp.o mga_irq.o
 i810-objs   := i810_drv.o i810_dma.o
 i915-objs   := i915_drv.o i915_dma.o i915_irq.o i915_mem.o i915_fence.o \
-		i915_buffer.o i915_compat.o i915_execbuf.o
+		i915_buffer.o i915_compat.o i915_execbuf.o i915_mm.o
 nouveau-objs := nouveau_drv.o nouveau_state.o nouveau_fifo.o nouveau_mem.o \
 		nouveau_object.o nouveau_irq.o nouveau_notifier.o nouveau_swmthd.o \
 		nouveau_sgdma.o nouveau_dma.o nouveau_bo.o nouveau_fence.o \

linux-core/drmP.h

@@ -1278,6 +1278,10 @@ extern int drm_memrange_remove_space_from_tail(struct drm_memrange *mm,
 					       unsigned long size);
 extern int drm_memrange_add_space_to_tail(struct drm_memrange *mm,
 					  unsigned long size);
+extern int drm_memrange_for_each(struct drm_memrange *mm,
+				 int (*callback)(struct drm_memrange_node *node,
+						 void *data),
+				 void *data);
 
 static inline struct drm_memrange *drm_get_mm(struct drm_memrange_node *block)
 {

linux-core/drm_memrange.c

@@ -273,6 +273,31 @@ int drm_memrange_init(struct drm_memrange * mm, unsigned long start, unsigned lo
 	return drm_memrange_create_tail_node(mm, start, size);
 }
 
+/**
+ * Walks the list of allocated memory ranges and calls the callback on
+ * one.
+ */
+int drm_memrange_for_each(struct drm_memrange *mm,
+			  int (*callback)(struct drm_memrange_node *node,
+					  void *data),
+			  void *data)
+{
+	struct list_head *list, *next;
+
+	list_for_each_safe(list, next, &mm->ml_entry) {
+		struct drm_memrange_node *cur;
+		int ret;
+
+		cur = list_entry(list, struct drm_memrange_node, ml_entry);
+
+		ret = callback(cur, data);
+		if (ret != 0)
+			return ret;
+	}
+
+	return 0;
+}
+
 EXPORT_SYMBOL(drm_memrange_init);
 
 void drm_memrange_takedown(struct drm_memrange * mm)

shared-core/i915_dma.c

@@ -1124,6 +1124,8 @@ struct drm_ioctl_desc i915_ioctls[] = {
 #ifdef I915_HAVE_BUFFER
 	DRM_IOCTL_DEF(DRM_I915_EXECBUFFER, i915_execbuffer, DRM_AUTH),
 #endif
+	DRM_IOCTL_DEF(DRM_I915_MM_INIT, intel_mm_init_ioctl, DRM_AUTH),
+	DRM_IOCTL_DEF(DRM_I915_MM_EXECBUFFER, intel_mm_execbuffer, DRM_AUTH),
 };
 
 int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);

shared-core/i915_drm.h

@@ -176,6 +176,8 @@ typedef struct drm_i915_sarea {
 #define DRM_I915_MMIO		0x10
 #define DRM_I915_HWS_ADDR	0x11
 #define DRM_I915_EXECBUFFER	0x12
+#define DRM_I915_MM_INIT	0x13
+#define DRM_I915_MM_EXECBUFFER	0x14
 
 #define DRM_IOCTL_I915_INIT		DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
 #define DRM_IOCTL_I915_FLUSH		DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
@@ -195,6 +197,8 @@ typedef struct drm_i915_sarea {
 #define DRM_IOCTL_I915_VBLANK_SWAP	DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_VBLANK_SWAP, drm_i915_vblank_swap_t)
 #define DRM_IOCTL_I915_MMIO             DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_MMIO, drm_i915_mmio)
 #define DRM_IOCTL_I915_EXECBUFFER	DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_EXECBUFFER, struct drm_i915_execbuffer)
+#define DRM_IOCTL_I915_MM_INIT		DRM_IOW(DRM_COMMAND_BASE + DRM_I915_MM_INIT, struct drm_i915_mm_init)
+#define DRM_IOCTL_I915_MM_EXECBUFFER	DRM_IOW(DRM_COMMAND_BASE + DRM_I915_MM_INIT, struct drm_i915_mm_execbuffer)
 
 /* Asynchronous page flipping:
  */
@@ -394,4 +398,85 @@ struct drm_i915_execbuffer {
 	struct drm_fence_arg fence_arg;
 };
 
+struct drm_i915_mm_init {
+	/**
+	 * Beginning offset in the GTT to be managed by the DRM memory
+	 * manager.
+	 */
+	off_t gtt_start;
+	/**
+	 * Ending offset in the GTT to be managed by the DRM memory
+	 * manager.
+	 */
+	off_t gtt_end;
+};
+
+struct drm_i915_relocation_entry {
+	/**
+	 * Handle of the buffer being pointed to by this relocation entry.
+	 *
+	 * It's appealing to make this be an index into the mm_validate_entry
+	 * list to refer to the buffer, but handle lookup should be O(1) anyway,
+	 * and prevents O(n) search in userland to find what that index is.
+	 */
+	uint32_t target_buffer;
+
+	/** Offset in the buffer the relocation entry will be written into */
+	uint32_t offset;
+
+	/**
+	 * Value to be added to the offset of the target buffer to make up
+	 * the relocation entry.
+	 */
+	uint32_t delta;
+
+	/**
+	 * Offset value of the target buffer that the relocation entry was last
+	 * written as.
+	 *
+	 * If the buffer has the same offset as last time, we can skip syncing
+	 * and writing the relocation.  This value is written back out by
+	 * the execbuffer ioctl when the relocation is written.
+	 */
+	uint32_t presumed_offset;
+};
+
+struct drm_i915_mm_validate_entry {
+	/**
+	 * User's handle for a buffer to be bound into the GTT for this
+	 * operation.
+	 */
+	uint32_t buffer_handle;
+	/**
+	 * Returned value of the updated offset of the buffer, for future
+	 * presumed_offset writes.
+	 */
+	uint32_t buffer_offset;
+	/** List of relocations to be performed on this buffer */
+	struct drm_i915_relocation_entry *relocs;
+	uint32_t relocation_count;
+};
+
+struct drm_i915_mm_execbuffer {
+	/**
+	 * List of buffers to be validated wit their relocations to be
+	 * performend on them.
+	 *
+	 * These buffers must be listed in an order such that all relocations
+	 * a buffer is performing refer to buffers that have already appeared
+	 * in the validate list.
+	 */
+	struct drm_i915_mm_validate_entry *buffers;
+	uint32_t buffer_count;
+
+	/** Offset in the batchbuffer to start execution from. */
+	uint32_t batch_start_offset;
+	/** Bytes used in batchbuffer from batch_start_offset */
+	uint32_t batch_len;
+	uint32_t DR1;
+	uint32_t DR4;
+	uint32_t num_cliprects;
+	struct drm_clip_rect *cliprects;
+};
+
 #endif				/* _I915_DRM_H_ */

shared-core/i915_drv.h

@@ -241,6 +241,10 @@ typedef struct drm_i915_private {
 	u8 saveDACMASK;
 	u8 saveDACDATA[256*3]; /* 256 3-byte colors */
 	u8 saveCR[36];
+
+	struct {
+		struct drm_memrange gtt_space;
+	} mm;
 } drm_i915_private_t;
 
 enum intel_chip_family {
@@ -329,6 +333,11 @@ void i915_flush_ttm(struct drm_ttm *ttm);
 /* i915_execbuf.c */
 int i915_execbuffer(struct drm_device *dev, void *data,
 				   struct drm_file *file_priv);
+/* i915_mm.c */
+int intel_mm_init_ioctl(struct drm_device *dev, void *data,
+			struct drm_file *file_priv);
+int intel_mm_execbuffer(struct drm_device *dev, void *data,
+			struct drm_file *file_priv);
 
 #endif