summaryrefslogtreecommitdiff
AgeCommit message (Expand)Author
2006-04-09Revert a change that accidentally went in with whitespace changes fromEric Anholt
2006-04-08Compile fixes for FreeBSD.Eric Anholt
2006-04-05coverity bugfix from the kernelDave Airlie
2006-04-05remove stupid init and exit flags..Dave Airlie
2006-04-03make add context non master...Dave Airlie
2006-03-25radeon fix up the PCI ids for new memory map like the kernel one.. notDave Airlie
2006-03-20Bump driver date to reflect airlied's last fix.Adam Jackson
2006-03-19fix issue in mga from kernelDave Airlie
2006-03-19make some functions static in via driverDave Airlie
2006-03-17Add missing pci ids for new radeons (most but not all are pcie, r420,Roland Scheidegger
2006-03-15Avoid walking off the end of the hash table. (Coverity report #465)Adam Jackson
2006-03-08Fix bug I reintroducedDave Airlie
2006-03-08fix some use before NULL checkDave Airlie
2006-03-07ia64 support for r300_scratch. (not tested)Aapo Tahkola
2006-03-06Add general-purpose packet for manipulating scratch registers (r300)Aapo Tahkola
2006-03-01file xf86mm.c was initially added on branch drm-ttm-branch.Thomas Hellstrom
2006-03-01file xf86mm.h was initially added on branch drm-ttm-branch.Thomas Hellstrom
2006-02-25Add all radeon pci ids known by ddx, but only r350/rv350 and below (newRoland Scheidegger
2006-02-21set dma pages reservedDave Airlie
2006-02-21use coherent memory for PCI allocations with COMP flagDave Airlie
2006-02-20Formatting cleanup, dead code removal. Remove N() namespacing macro,Adam Jackson
2006-02-19experimental PCI DMA fixes use proper Linux interfacesDave Airlie
2006-02-19missed a piece of benh patchDave Airlie
2006-02-18make some functions static from the kernelDave Airlie
2006-02-18fix brace placementDave Airlie
2006-02-18always enable and set master on pci deviceDave Airlie
2006-02-18clear i915 interrupts sources on server exitDave Airlie
2006-02-18add proper checking for bitblt multiDave Airlie
2006-02-18add benh's memory management patchDave Airlie
2006-02-18fix build wrong function callDave Airlie
2006-02-18major realigment of DRM CVS with kernel code, makes integration much easierDave Airlie
2006-02-18fix card unloadDave Airlie
2006-02-18Fixup test for memory at end of memory spaceDave Airlie
2006-02-17via: Change via_drm.h versioning scheme after lenghty discussion onThomas Hellstrom
2006-02-17file i915_ttm.c was initially added on branch drm-ttm-branch.Thomas Hellstrom
2006-02-09Update the hardware breadcrumb in the sarea on irq reception so thatKeith Whitwell
2006-02-01file drm_mm.c was initially added on branch drm-ttm-branch.Thomas Hellstrom
2006-01-26add missing name, desc, date, major, minor and patchlevel entriesAlan Hourihane
2006-01-24fix an error message typo Unkown -> UnknownAlan Hourihane
2006-01-24other part of revertAlan Hourihane
2006-01-24put back some of Dave's code related to vblank support - accidentallyAlan Hourihane
2006-01-24file Makefile.am was initially added on branch drm-ttm-branch.Thomas Hellstrom
2006-01-24file drm_hashtab.c was initially added on branch drm-ttm-branch.Thomas Hellstrom
2006-01-23Fix CMDBUFFER path, add heap destroy and flesh out sarea for rotationAlan Hourihane
2006-01-20Add support for texture cache flushes (R300_TX_CNTL)Aapo Tahkola
2006-01-20Sync from r300_reg.h from Mesa.Aapo Tahkola
2006-01-19add Intel i945GM supportAlan Hourihane
2006-01-12via: direction bug in get_user_pages call in via_dmablit.c fixed. BumpedThomas Hellstrom
2006-01-06via: Version via_drm.h Alter the drm_via_dmablit_t IOCTL arg.Thomas Hellstrom
2006-01-06via: Last commit really required a bump of minor. Fix.Thomas Hellstrom
generated by cgit v1.2.3 (git 2.25.1) at 2025-09-11 17:10:10 +0000
81' href='#n381'>381 382 383 384 385 386 387 
/* 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.
 *
 */

#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(struct drm_device * dev, struct mem_block *p, int in_use)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
	struct drm_i915_sarea *sarea_priv = master_priv->sarea_priv;
	struct drm_tex_region *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,
				     struct drm_file *file_priv)
{
	/* 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->file_priv = 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->file_priv = 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->file_priv = file_priv;
	return p;
}

static struct mem_block *alloc_block(struct mem_block *heap, int size,
				     int align2, struct drm_file *file_priv)
{
	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->file_priv == NULL && start + size <= p->start + p->size)
			return split_block(p, start, size, file_priv);
	}

	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->file_priv = NULL;

	/* Assumes a single contiguous range.  Needs a special file_priv in
	 * 'heap' to stop it being subsumed.
	 */
	if (p->next->file_priv == 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->file_priv == 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->file_priv = NULL;
	blocks->next = blocks->prev = *heap;

	memset(*heap, 0, sizeof(**heap));
	(*heap)->file_priv = (struct drm_file *) - 1;
	(*heap)->next = (*heap)->prev = blocks;
	return 0;
}

/* Free all blocks associated with the releasing file.
 */
void i915_mem_release(struct drm_device * dev, struct drm_file *file_priv,
		      struct mem_block *heap)
{
	struct mem_block *p;

	if (!heap || !heap->next)
		return;

	for (p = heap->next; p != heap; p = p->next) {
		if (p->file_priv == file_priv) {
			p->file_priv = NULL;
			mark_block(dev, p, 0);
		}
	}

	/* Assumes a single contiguous range.  Needs a special file_priv in
	 * 'heap' to stop it being subsumed.
	 */
	for (p = heap->next; p != heap; p = p->next) {
		while (p->file_priv == NULL && p->next->file_priv == 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(struct drm_i915_private * 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(struct drm_device *dev, void *data,
		   struct drm_file *file_priv)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_i915_mem_alloc *alloc = data;
	struct mem_block *block, **heap;

	if (!dev_priv) {
		DRM_ERROR("called with no initialization\n");
		return -EINVAL;
	}

	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, file_priv);

	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;
}

int i915_mem_free(struct drm_device *dev, void *data,
		  struct drm_file *file_priv)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_i915_mem_free *memfree = data;
	struct mem_block *block, **heap;

	if (!dev_priv) {
		DRM_ERROR("called with no initialization\n");
		return -EINVAL;
	}

	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->file_priv != file_priv)
		return -EPERM;

	mark_block(dev, block, 0);
	free_block(block);
	return 0;
}

int i915_mem_init_heap(struct drm_device *dev, void *data,
		       struct drm_file *file_priv)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_i915_mem_init_heap *initheap = data;
	struct mem_block **heap;

	if (!dev_priv) {
		DRM_ERROR("called with no initialization\n");
		return -EINVAL;
	}

	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);
}

int i915_mem_destroy_heap( struct drm_device *dev, void *data,
			   struct drm_file *file_priv )
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_i915_mem_destroy_heap *destroyheap = data;
	struct mem_block **heap;

	if ( !dev_priv ) {
		DRM_ERROR( "called with no initialization\n" );
		return -EINVAL;
	}

	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;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-09-11 17:10:09 +0000