--- old/usr/src/uts/intel/io/drm/i915_mem.c	Sun May 28 15:47:16 2017
+++ /dev/null	Sun May 28 15:44:56 2017
@@ -1,425 +0,0 @@
-/* BEGIN CSTYLED */
-
-/* i915_mem.c -- Simple agp/fb memory manager for i915 -*- linux-c -*-
- */
-/*
- * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
- * 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 above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- * 
- * 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 TUNGSTEN GRAPHICS 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.
- * 
- */
-
-/*
- * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
-/* This memory manager is integrated into the global/local lru
- * mechanisms used by the clients.  Specifically, it operates by
- * setting the 'in_use' fields of the global LRU to indicate whether
- * this region is privately allocated to a client.
- *
- * This does require the client to actually respect that field.
- *
- * Currently no effort is made to allocate 'private' memory in any
- * clever way - the LRU information isn't used to determine which
- * block to allocate, and the ring is drained prior to allocations --
- * in other words allocation is expensive.
- */
-
-#include "drmP.h"
-#include "drm.h"
-#include "i915_drm.h"
-#include "i915_drv.h"
-
-void mark_block(drm_device_t * dev, struct mem_block *p, int in_use)
-{
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	drm_i915_sarea_t *sarea_priv = dev_priv->sarea_priv;
-	drm_tex_region_t *list;
-	unsigned shift, nr;
-	unsigned start;
-	unsigned end;
-	unsigned i;
-	int age;
-
-	shift = dev_priv->tex_lru_log_granularity;
-	nr = I915_NR_TEX_REGIONS;
-
-	start = p->start >> shift;
-	end = (p->start + p->size - 1) >> shift;
-
-	age = ++sarea_priv->texAge;
-	list = sarea_priv->texList;
-
-	/* Mark the regions with the new flag and update their age.  Move
-	 * them to head of list to preserve LRU semantics.
-	 */
-	for (i = start; i <= end; i++) {
-		list[i].in_use = (unsigned char)in_use;
-		list[i].age = age;
-
-		/* remove_from_list(i)
-		 */
-		list[(unsigned)list[i].next].prev = list[i].prev;
-		list[(unsigned)list[i].prev].next = list[i].next;
-
-		/* insert_at_head(list, i)
-		 */
-		list[i].prev = (unsigned char)nr;
-		list[i].next = list[nr].next;
-		list[(unsigned)list[nr].next].prev = (unsigned char)i;
-		list[nr].next = (unsigned char)i;
-	}
-}
-
-/* Very simple allocator for agp memory, working on a static range
- * already mapped into each client's address space.
- */
-
-static struct mem_block *split_block(struct mem_block *p, int start, int size, drm_file_t *fpriv)
-{
-	/* Maybe cut off the start of an existing block */
-	if (start > p->start) {
-		struct mem_block *newblock =
-		    drm_alloc(sizeof(*newblock), DRM_MEM_BUFLISTS);
-		if (!newblock)
-			goto out;
-		newblock->start = start;
-		newblock->size = p->size - (start - p->start);
-		newblock->filp = NULL;
-		newblock->next = p->next;
-		newblock->prev = p;
-		p->next->prev = newblock;
-		p->next = newblock;
-		p->size -= newblock->size;
-		p = newblock;
-	}
-
-	/* Maybe cut off the end of an existing block */
-	if (size < p->size) {
-		struct mem_block *newblock =
-		    drm_alloc(sizeof(*newblock), DRM_MEM_BUFLISTS);
-		if (!newblock)
-			goto out;
-		newblock->start = start + size;
-		newblock->size = p->size - size;
-		newblock->filp = NULL;
-		newblock->next = p->next;
-		newblock->prev = p;
-		p->next->prev = newblock;
-		p->next = newblock;
-		p->size = size;
-	}
-
-      out:
-	/* Our block is in the middle */
-	p->filp = fpriv;
-	return (p);
-}
-
-static struct mem_block *alloc_block(struct mem_block *heap, int size,
-				     int align2, drm_file_t *fpriv)
-{
-	struct mem_block *p;
-	int mask = (1 << align2) - 1;
-
-	for (p = heap->next; p != heap; p = p->next) {
-		int start = (p->start + mask) & ~mask;
-		if (p->filp == NULL && start + size <= p->start + p->size)
-			return split_block(p, start, size, fpriv);
-	}
-
-	return NULL;
-}
-
-static struct mem_block *find_block(struct mem_block *heap, int start)
-{
-	struct mem_block *p;
-
-	for (p = heap->next; p != heap; p = p->next)
-		if (p->start == start)
-			return (p);
-
-	return (NULL);
-}
-
-struct mem_block *find_block_by_proc(struct mem_block *heap, drm_file_t *fpriv)
-{
-	struct mem_block *p;
-
-	for (p = heap->next; p != heap; p = p->next)
-		if (p->filp == fpriv)
-			return (p);
-
-	return (NULL);
-}
-
-void free_block(struct mem_block *p)
-{
-	p->filp = NULL;
-
-	/* Assumes a single contiguous range.  Needs a special filp in
-	 * 'heap' to stop it being subsumed.
-	 */
-	if (p->next->filp == NULL) {
-		struct mem_block *q = p->next;
-		p->size += q->size;
-		p->next = q->next;
-		p->next->prev = p;
-		drm_free(q, sizeof(*q), DRM_MEM_BUFLISTS);
-	}
-
-	if (p->prev->filp == NULL) {
-		struct mem_block *q = p->prev;
-		q->size += p->size;
-		q->next = p->next;
-		q->next->prev = q;
-		drm_free(p, sizeof(*q), DRM_MEM_BUFLISTS);
-	}
-}
-
-/* Initialize.  How to check for an uninitialized heap?
- */
-static int init_heap(struct mem_block **heap, int start, int size)
-{
-	struct mem_block *blocks = drm_alloc(sizeof(*blocks), DRM_MEM_BUFLISTS);
-
-	if (!blocks)
-		return (ENOMEM);
-
-	*heap = drm_alloc(sizeof(**heap), DRM_MEM_BUFLISTS);
-	if (!*heap) {
-		drm_free(blocks, sizeof(*blocks), DRM_MEM_BUFLISTS);
-		return (ENOMEM);
-	}
-
-	blocks->start = start;
-	blocks->size = size;
-	blocks->filp = NULL;
-	blocks->next = blocks->prev = *heap;
-
-	(void) memset(*heap, 0, sizeof(**heap));
-	(*heap)->filp = (drm_file_t *) - 1;
-	(*heap)->next = (*heap)->prev = blocks;
-	return (0);
-}
-
-/* Free all blocks associated with the releasing file.
- */
-void i915_mem_release(drm_device_t * dev, drm_file_t *fpriv, struct mem_block *heap)
-{
-	struct mem_block *p;
-
-	if (!heap || !heap->next)
-		return;
-
-	for (p = heap->next; p != heap; p = p->next) {
-		if (p->filp == fpriv) {
-			p->filp = NULL;
-			mark_block(dev, p, 0);
-		}
-	}
-
-	/* Assumes a single contiguous range.  Needs a special filp in
-	 * 'heap' to stop it being subsumed.
-	 */
-	for (p = heap->next; p != heap; p = p->next) {
-		while (p->filp == NULL && p->next->filp == NULL) {
-			struct mem_block *q = p->next;
-			p->size += q->size;
-			p->next = q->next;
-			p->next->prev = p;
-			drm_free(q, sizeof(*q), DRM_MEM_BUFLISTS);
-		}
-	}
-}
-
-/* Shutdown.
- */
-void i915_mem_takedown(struct mem_block **heap)
-{
-	struct mem_block *p;
-
-	if (!*heap)
-		return;
-
-	for (p = (*heap)->next; p != *heap;) {
-		struct mem_block *q = p;
-		p = p->next;
-		drm_free(q, sizeof(*q), DRM_MEM_BUFLISTS);
-	}
-
-	drm_free(*heap, sizeof(**heap), DRM_MEM_BUFLISTS);
-	*heap = NULL;
-}
-
-struct mem_block **get_heap(drm_i915_private_t * dev_priv, int region)
-{
-	switch (region) {
-	case I915_MEM_REGION_AGP:
-		return (&dev_priv->agp_heap);
-	default:
-		return (NULL);
-	}
-}
-
-/* IOCTL HANDLERS */
-
-/*ARGSUSED*/
-int i915_mem_alloc(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	drm_i915_mem_alloc_t alloc;
-	struct mem_block *block, **heap;
-
-	if (!dev_priv) {
-		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
-		return (EINVAL);
-	}
-
-	if (ddi_model_convert_from(mode & FMODELS) == DDI_MODEL_ILP32) {
-		drm_i915_mem_alloc32_t	alloc32;
-
-		DRM_COPYFROM_WITH_RETURN(&alloc32, (void *)data, sizeof (alloc32));
-		alloc.region = alloc32.region;
-		alloc.alignment = alloc32.alignment;
-		alloc.size = alloc32.size;
-		alloc.region_offset = (int *)(uintptr_t)alloc32.region_offset;
-	} else
-		DRM_COPYFROM_WITH_RETURN(&alloc, (void *) data, sizeof(alloc));
-
-	heap = get_heap(dev_priv, alloc.region);
-	if (!heap || !*heap)
-		return (EFAULT);
-
-	/* Make things easier on ourselves: all allocations at least
-	 * 4k aligned.
-	 */
-	if (alloc.alignment < 12)
-		alloc.alignment = 12;
-
-	block = alloc_block(*heap, alloc.size, alloc.alignment, fpriv);
-
-	if (!block)
-		return (ENOMEM);
-
-	mark_block(dev, block, 1);
-
-	if (DRM_COPY_TO_USER(alloc.region_offset, &block->start, sizeof(int))) {
-		DRM_ERROR("copy_to_user\n");
-		return (EFAULT);
-	}
-
-	return (0);
-}
-
-/*ARGSUSED*/
-int i915_mem_free(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	drm_i915_mem_free_t memfree;
-	struct mem_block *block, **heap;
-
-	if (!dev_priv) {
-		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
-		return (EINVAL);
-	}
-
-	DRM_COPYFROM_WITH_RETURN(&memfree, (void *)data, sizeof(memfree));
-
-	heap = get_heap(dev_priv, memfree.region);
-	if (!heap || !*heap)
-		return (EFAULT);
-
-	block = find_block(*heap, memfree.region_offset);
-	if (!block)
-		return (EFAULT);
-
-	if (block->filp != fpriv)
-		return (EPERM);
-
-	mark_block(dev, block, 0);
-	free_block(block);
-	return (0);
-}
-
-/*ARGSUSED*/
-int i915_mem_init_heap(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	drm_i915_mem_init_heap_t initheap;
-	struct mem_block **heap;
-
-	if (!dev_priv) {
-		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
-		return (EINVAL);
-	}
-
-	DRM_COPYFROM_WITH_RETURN(&initheap, (void *)data, sizeof(initheap));
-
-	heap = get_heap(dev_priv, initheap.region);
-	if (!heap)
-		return (EFAULT);
-
-	if (*heap) {
-		DRM_ERROR("heap already initialized?");
-		return (EFAULT);
-	}
-
-	return init_heap(heap, initheap.start, initheap.size);
-}
-
-/*ARGSUSED*/
-int i915_mem_destroy_heap(DRM_IOCTL_ARGS)
-{
-	DRM_DEVICE;
-	drm_i915_private_t *dev_priv = dev->dev_private;
-	drm_i915_mem_destroy_heap_t destroyheap;
-	struct mem_block **heap;
-
-	if (!dev_priv) {
-		DRM_ERROR("%s called with no initialization\n", __FUNCTION__);
-		return (EINVAL);
-	}
-
-	DRM_COPYFROM_WITH_RETURN(&destroyheap, (void *)data, sizeof(destroyheap));
-
-	heap = get_heap(dev_priv, destroyheap.region);
-	if (!heap) {
-		DRM_ERROR("get_heap failed");
-		return (EFAULT);
-	}
-	
-	if (!*heap) {
-		DRM_ERROR("heap not initialized?");
-		return (EFAULT);
-	}
-
-	i915_mem_takedown(heap);
-	return (0);
-}
