From 6677e2a10b820a5ccfd375cc627b8e41453a71da Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@theobromine.nwnk.net>
Date: Wed, 19 Jul 2006 16:19:25 -0400
Subject: Delete the pre-core DRM code with extreme prejudice.

---
 shared/i915_mem.c | 347 ------------------------------------------------------
 1 file changed, 347 deletions(-)
 delete mode 100644 shared/i915_mem.c

(limited to 'shared/i915_mem.c')

diff --git a/shared/i915_mem.c b/shared/i915_mem.c
deleted file mode 100644
index c6115b7e..00000000
--- a/shared/i915_mem.c
+++ /dev/null
@@ -1,347 +0,0 @@
-/* i915_mem.c -- Simple agp/fb memory manager for i915 -*- linux-c -*-
- */
-/**************************************************************************
- * 
- * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
- * All Rights Reserved.
- * 
- **************************************************************************/
-
-#include "i915.h"
-#include "drmP.h"
-#include "drm.h"
-#include "i915_drm.h"
-#include "i915_drv.h"
-
-/* 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.
- */
-static 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 = 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 = nr;
-		list[i].next = list[nr].next;
-		list[(unsigned)list[nr].next].prev = i;
-		list[nr].next = 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,
-				     DRMFILE filp)
-{
-	/* 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 = filp;
-	return p;
-}
-
-static struct mem_block *alloc_block(struct mem_block *heap, int size,
-				     int align2, DRMFILE filp)
-{
-	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, filp);
-	}
-
-	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;
-}
-
-static 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;
-
-	memset(*heap, 0, sizeof(**heap));
-	(*heap)->filp = (DRMFILE) - 1;
-	(*heap)->next = (*heap)->prev = blocks;
-	return 0;
-}
-
-/* Free all blocks associated with the releasing file.
- */
-void i915_mem_release(drm_device_t * dev, DRMFILE filp, 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 == filp) {
-			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;
-}
-
-static 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 */
-
-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 DRM_ERR(EINVAL);
-	}
-
-	DRM_COPY_FROM_USER_IOCTL(alloc, (drm_i915_mem_alloc_t __user *) data,
-				 sizeof(alloc));
-
-	heap = get_heap(dev_priv, alloc.region);
-	if (!heap || !*heap)
-		return DRM_ERR(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, filp);
-
-	if (!block)
-		return DRM_ERR(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 DRM_ERR(EFAULT);
-	}
-
-	return 0;
-}
-
-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 DRM_ERR(EINVAL);
-	}
-
-	DRM_COPY_FROM_USER_IOCTL(memfree, (drm_i915_mem_free_t __user *) data,
-				 sizeof(memfree));
-
-	heap = get_heap(dev_priv, memfree.region);
-	if (!heap || !*heap)
-		return DRM_ERR(EFAULT);
-
-	block = find_block(*heap, memfree.region_offset);
-	if (!block)
-		return DRM_ERR(EFAULT);
-
-	if (block->filp != filp)
-		return DRM_ERR(EPERM);
-
-	mark_block(dev, block, 0);
-	free_block(block);
-	return 0;
-}
-
-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 DRM_ERR(EINVAL);
-	}
-
-	DRM_COPY_FROM_USER_IOCTL(initheap,
-				 (drm_i915_mem_init_heap_t __user *) data,
-				 sizeof(initheap));
-
-	heap = get_heap(dev_priv, initheap.region);
-	if (!heap)
-		return DRM_ERR(EFAULT);
-
-	if (*heap) {
-		DRM_ERROR("heap already initialized?");
-		return DRM_ERR(EFAULT);
-	}
-
-	return init_heap(heap, initheap.start, initheap.size);
-}
-- 
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