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Diffstat (limited to 'ANDROID_3.4.5/drivers/gpu/drm/drm_mm.c')
-rw-r--r--ANDROID_3.4.5/drivers/gpu/drm/drm_mm.c717
1 files changed, 0 insertions, 717 deletions
diff --git a/ANDROID_3.4.5/drivers/gpu/drm/drm_mm.c b/ANDROID_3.4.5/drivers/gpu/drm/drm_mm.c
deleted file mode 100644
index 961fb54f..00000000
--- a/ANDROID_3.4.5/drivers/gpu/drm/drm_mm.c
+++ /dev/null
@@ -1,717 +0,0 @@
-/**************************************************************************
- *
- * 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 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
- * 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.
- *
- *
- **************************************************************************/
-
-/*
- * Generic simple memory manager implementation. Intended to be used as a base
- * class implementation for more advanced memory managers.
- *
- * Note that the algorithm used is quite simple and there might be substantial
- * performance gains if a smarter free list is implemented. Currently it is just an
- * unordered stack of free regions. This could easily be improved if an RB-tree
- * is used instead. At least if we expect heavy fragmentation.
- *
- * Aligned allocations can also see improvement.
- *
- * Authors:
- * Thomas Hellström <thomas-at-tungstengraphics-dot-com>
- */
-
-#include "drmP.h"
-#include "drm_mm.h"
-#include <linux/slab.h>
-#include <linux/seq_file.h>
-#include <linux/export.h>
-
-#define MM_UNUSED_TARGET 4
-
-static struct drm_mm_node *drm_mm_kmalloc(struct drm_mm *mm, int atomic)
-{
- struct drm_mm_node *child;
-
- if (atomic)
- child = kzalloc(sizeof(*child), GFP_ATOMIC);
- else
- child = kzalloc(sizeof(*child), GFP_KERNEL);
-
- if (unlikely(child == NULL)) {
- spin_lock(&mm->unused_lock);
- if (list_empty(&mm->unused_nodes))
- child = NULL;
- else {
- child =
- list_entry(mm->unused_nodes.next,
- struct drm_mm_node, node_list);
- list_del(&child->node_list);
- --mm->num_unused;
- }
- spin_unlock(&mm->unused_lock);
- }
- return child;
-}
-
-/* drm_mm_pre_get() - pre allocate drm_mm_node structure
- * drm_mm: memory manager struct we are pre-allocating for
- *
- * Returns 0 on success or -ENOMEM if allocation fails.
- */
-int drm_mm_pre_get(struct drm_mm *mm)
-{
- struct drm_mm_node *node;
-
- spin_lock(&mm->unused_lock);
- while (mm->num_unused < MM_UNUSED_TARGET) {
- spin_unlock(&mm->unused_lock);
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- spin_lock(&mm->unused_lock);
-
- if (unlikely(node == NULL)) {
- int ret = (mm->num_unused < 2) ? -ENOMEM : 0;
- spin_unlock(&mm->unused_lock);
- return ret;
- }
- ++mm->num_unused;
- list_add_tail(&node->node_list, &mm->unused_nodes);
- }
- spin_unlock(&mm->unused_lock);
- return 0;
-}
-EXPORT_SYMBOL(drm_mm_pre_get);
-
-static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node)
-{
- return hole_node->start + hole_node->size;
-}
-
-static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
-{
- struct drm_mm_node *next_node =
- list_entry(hole_node->node_list.next, struct drm_mm_node,
- node_list);
-
- return next_node->start;
-}
-
-static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
- struct drm_mm_node *node,
- unsigned long size, unsigned alignment)
-{
- struct drm_mm *mm = hole_node->mm;
- unsigned long tmp = 0, wasted = 0;
- unsigned long hole_start = drm_mm_hole_node_start(hole_node);
- unsigned long hole_end = drm_mm_hole_node_end(hole_node);
-
- BUG_ON(!hole_node->hole_follows || node->allocated);
-
- if (alignment)
- tmp = hole_start % alignment;
-
- if (!tmp) {
- hole_node->hole_follows = 0;
- list_del_init(&hole_node->hole_stack);
- } else
- wasted = alignment - tmp;
-
- node->start = hole_start + wasted;
- node->size = size;
- node->mm = mm;
- node->allocated = 1;
-
- INIT_LIST_HEAD(&node->hole_stack);
- list_add(&node->node_list, &hole_node->node_list);
-
- BUG_ON(node->start + node->size > hole_end);
-
- if (node->start + node->size < hole_end) {
- list_add(&node->hole_stack, &mm->hole_stack);
- node->hole_follows = 1;
- } else {
- node->hole_follows = 0;
- }
-}
-
-struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node,
- unsigned long size,
- unsigned alignment,
- int atomic)
-{
- struct drm_mm_node *node;
-
- node = drm_mm_kmalloc(hole_node->mm, atomic);
- if (unlikely(node == NULL))
- return NULL;
-
- drm_mm_insert_helper(hole_node, node, size, alignment);
-
- return node;
-}
-EXPORT_SYMBOL(drm_mm_get_block_generic);
-
-/**
- * Search for free space and insert a preallocated memory node. Returns
- * -ENOSPC if no suitable free area is available. The preallocated memory node
- * must be cleared.
- */
-int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
- unsigned long size, unsigned alignment)
-{
- struct drm_mm_node *hole_node;
-
- hole_node = drm_mm_search_free(mm, size, alignment, 0);
- if (!hole_node)
- return -ENOSPC;
-
- drm_mm_insert_helper(hole_node, node, size, alignment);
-
- return 0;
-}
-EXPORT_SYMBOL(drm_mm_insert_node);
-
-static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
- struct drm_mm_node *node,
- unsigned long size, unsigned alignment,
- unsigned long start, unsigned long end)
-{
- struct drm_mm *mm = hole_node->mm;
- unsigned long tmp = 0, wasted = 0;
- unsigned long hole_start = drm_mm_hole_node_start(hole_node);
- unsigned long hole_end = drm_mm_hole_node_end(hole_node);
-
- BUG_ON(!hole_node->hole_follows || node->allocated);
-
- if (hole_start < start)
- wasted += start - hole_start;
- if (alignment)
- tmp = (hole_start + wasted) % alignment;
-
- if (tmp)
- wasted += alignment - tmp;
-
- if (!wasted) {
- hole_node->hole_follows = 0;
- list_del_init(&hole_node->hole_stack);
- }
-
- node->start = hole_start + wasted;
- node->size = size;
- node->mm = mm;
- node->allocated = 1;
-
- INIT_LIST_HEAD(&node->hole_stack);
- list_add(&node->node_list, &hole_node->node_list);
-
- BUG_ON(node->start + node->size > hole_end);
- BUG_ON(node->start + node->size > end);
-
- if (node->start + node->size < hole_end) {
- list_add(&node->hole_stack, &mm->hole_stack);
- node->hole_follows = 1;
- } else {
- node->hole_follows = 0;
- }
-}
-
-struct drm_mm_node *drm_mm_get_block_range_generic(struct drm_mm_node *hole_node,
- unsigned long size,
- unsigned alignment,
- unsigned long start,
- unsigned long end,
- int atomic)
-{
- struct drm_mm_node *node;
-
- node = drm_mm_kmalloc(hole_node->mm, atomic);
- if (unlikely(node == NULL))
- return NULL;
-
- drm_mm_insert_helper_range(hole_node, node, size, alignment,
- start, end);
-
- return node;
-}
-EXPORT_SYMBOL(drm_mm_get_block_range_generic);
-
-/**
- * Search for free space and insert a preallocated memory node. Returns
- * -ENOSPC if no suitable free area is available. This is for range
- * restricted allocations. The preallocated memory node must be cleared.
- */
-int drm_mm_insert_node_in_range(struct drm_mm *mm, struct drm_mm_node *node,
- unsigned long size, unsigned alignment,
- unsigned long start, unsigned long end)
-{
- struct drm_mm_node *hole_node;
-
- hole_node = drm_mm_search_free_in_range(mm, size, alignment,
- start, end, 0);
- if (!hole_node)
- return -ENOSPC;
-
- drm_mm_insert_helper_range(hole_node, node, size, alignment,
- start, end);
-
- return 0;
-}
-EXPORT_SYMBOL(drm_mm_insert_node_in_range);
-
-/**
- * Remove a memory node from the allocator.
- */
-void drm_mm_remove_node(struct drm_mm_node *node)
-{
- struct drm_mm *mm = node->mm;
- struct drm_mm_node *prev_node;
-
- BUG_ON(node->scanned_block || node->scanned_prev_free
- || node->scanned_next_free);
-
- prev_node =
- list_entry(node->node_list.prev, struct drm_mm_node, node_list);
-
- if (node->hole_follows) {
- BUG_ON(drm_mm_hole_node_start(node)
- == drm_mm_hole_node_end(node));
- list_del(&node->hole_stack);
- } else
- BUG_ON(drm_mm_hole_node_start(node)
- != drm_mm_hole_node_end(node));
-
- if (!prev_node->hole_follows) {
- prev_node->hole_follows = 1;
- list_add(&prev_node->hole_stack, &mm->hole_stack);
- } else
- list_move(&prev_node->hole_stack, &mm->hole_stack);
-
- list_del(&node->node_list);
- node->allocated = 0;
-}
-EXPORT_SYMBOL(drm_mm_remove_node);
-
-/*
- * Remove a memory node from the allocator and free the allocated struct
- * drm_mm_node. Only to be used on a struct drm_mm_node obtained by one of the
- * drm_mm_get_block functions.
- */
-void drm_mm_put_block(struct drm_mm_node *node)
-{
-
- struct drm_mm *mm = node->mm;
-
- drm_mm_remove_node(node);
-
- spin_lock(&mm->unused_lock);
- if (mm->num_unused < MM_UNUSED_TARGET) {
- list_add(&node->node_list, &mm->unused_nodes);
- ++mm->num_unused;
- } else
- kfree(node);
- spin_unlock(&mm->unused_lock);
-}
-EXPORT_SYMBOL(drm_mm_put_block);
-
-static int check_free_hole(unsigned long start, unsigned long end,
- unsigned long size, unsigned alignment)
-{
- unsigned wasted = 0;
-
- if (end - start < size)
- return 0;
-
- if (alignment) {
- unsigned tmp = start % alignment;
- if (tmp)
- wasted = alignment - tmp;
- }
-
- if (end >= start + size + wasted) {
- return 1;
- }
-
- return 0;
-}
-
-struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
- unsigned long size,
- unsigned alignment, int best_match)
-{
- struct drm_mm_node *entry;
- struct drm_mm_node *best;
- unsigned long best_size;
-
- BUG_ON(mm->scanned_blocks);
-
- best = NULL;
- best_size = ~0UL;
-
- list_for_each_entry(entry, &mm->hole_stack, hole_stack) {
- BUG_ON(!entry->hole_follows);
- if (!check_free_hole(drm_mm_hole_node_start(entry),
- drm_mm_hole_node_end(entry),
- size, alignment))
- continue;
-
- if (!best_match)
- return entry;
-
- if (entry->size < best_size) {
- best = entry;
- best_size = entry->size;
- }
- }
-
- return best;
-}
-EXPORT_SYMBOL(drm_mm_search_free);
-
-struct drm_mm_node *drm_mm_search_free_in_range(const struct drm_mm *mm,
- unsigned long size,
- unsigned alignment,
- unsigned long start,
- unsigned long end,
- int best_match)
-{
- struct drm_mm_node *entry;
- struct drm_mm_node *best;
- unsigned long best_size;
-
- BUG_ON(mm->scanned_blocks);
-
- best = NULL;
- best_size = ~0UL;
-
- list_for_each_entry(entry, &mm->hole_stack, hole_stack) {
- unsigned long adj_start = drm_mm_hole_node_start(entry) < start ?
- start : drm_mm_hole_node_start(entry);
- unsigned long adj_end = drm_mm_hole_node_end(entry) > end ?
- end : drm_mm_hole_node_end(entry);
-
- BUG_ON(!entry->hole_follows);
- if (!check_free_hole(adj_start, adj_end, size, alignment))
- continue;
-
- if (!best_match)
- return entry;
-
- if (entry->size < best_size) {
- best = entry;
- best_size = entry->size;
- }
- }
-
- return best;
-}
-EXPORT_SYMBOL(drm_mm_search_free_in_range);
-
-/**
- * Moves an allocation. To be used with embedded struct drm_mm_node.
- */
-void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new)
-{
- list_replace(&old->node_list, &new->node_list);
- list_replace(&old->hole_stack, &new->hole_stack);
- new->hole_follows = old->hole_follows;
- new->mm = old->mm;
- new->start = old->start;
- new->size = old->size;
-
- old->allocated = 0;
- new->allocated = 1;
-}
-EXPORT_SYMBOL(drm_mm_replace_node);
-
-/**
- * Initializa lru scanning.
- *
- * This simply sets up the scanning routines with the parameters for the desired
- * hole.
- *
- * Warning: As long as the scan list is non-empty, no other operations than
- * adding/removing nodes to/from the scan list are allowed.
- */
-void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
- unsigned alignment)
-{
- mm->scan_alignment = alignment;
- mm->scan_size = size;
- mm->scanned_blocks = 0;
- mm->scan_hit_start = 0;
- mm->scan_hit_size = 0;
- mm->scan_check_range = 0;
- mm->prev_scanned_node = NULL;
-}
-EXPORT_SYMBOL(drm_mm_init_scan);
-
-/**
- * Initializa lru scanning.
- *
- * This simply sets up the scanning routines with the parameters for the desired
- * hole. This version is for range-restricted scans.
- *
- * Warning: As long as the scan list is non-empty, no other operations than
- * adding/removing nodes to/from the scan list are allowed.
- */
-void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size,
- unsigned alignment,
- unsigned long start,
- unsigned long end)
-{
- mm->scan_alignment = alignment;
- mm->scan_size = size;
- mm->scanned_blocks = 0;
- mm->scan_hit_start = 0;
- mm->scan_hit_size = 0;
- mm->scan_start = start;
- mm->scan_end = end;
- mm->scan_check_range = 1;
- mm->prev_scanned_node = NULL;
-}
-EXPORT_SYMBOL(drm_mm_init_scan_with_range);
-
-/**
- * Add a node to the scan list that might be freed to make space for the desired
- * hole.
- *
- * Returns non-zero, if a hole has been found, zero otherwise.
- */
-int drm_mm_scan_add_block(struct drm_mm_node *node)
-{
- struct drm_mm *mm = node->mm;
- struct drm_mm_node *prev_node;
- unsigned long hole_start, hole_end;
- unsigned long adj_start;
- unsigned long adj_end;
-
- mm->scanned_blocks++;
-
- BUG_ON(node->scanned_block);
- node->scanned_block = 1;
-
- prev_node = list_entry(node->node_list.prev, struct drm_mm_node,
- node_list);
-
- node->scanned_preceeds_hole = prev_node->hole_follows;
- prev_node->hole_follows = 1;
- list_del(&node->node_list);
- node->node_list.prev = &prev_node->node_list;
- node->node_list.next = &mm->prev_scanned_node->node_list;
- mm->prev_scanned_node = node;
-
- hole_start = drm_mm_hole_node_start(prev_node);
- hole_end = drm_mm_hole_node_end(prev_node);
- if (mm->scan_check_range) {
- adj_start = hole_start < mm->scan_start ?
- mm->scan_start : hole_start;
- adj_end = hole_end > mm->scan_end ?
- mm->scan_end : hole_end;
- } else {
- adj_start = hole_start;
- adj_end = hole_end;
- }
-
- if (check_free_hole(adj_start , adj_end,
- mm->scan_size, mm->scan_alignment)) {
- mm->scan_hit_start = hole_start;
- mm->scan_hit_size = hole_end;
-
- return 1;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(drm_mm_scan_add_block);
-
-/**
- * Remove a node from the scan list.
- *
- * Nodes _must_ be removed in the exact same order from the scan list as they
- * have been added, otherwise the internal state of the memory manager will be
- * corrupted.
- *
- * When the scan list is empty, the selected memory nodes can be freed. An
- * immediately following drm_mm_search_free with best_match = 0 will then return
- * the just freed block (because its at the top of the free_stack list).
- *
- * Returns one if this block should be evicted, zero otherwise. Will always
- * return zero when no hole has been found.
- */
-int drm_mm_scan_remove_block(struct drm_mm_node *node)
-{
- struct drm_mm *mm = node->mm;
- struct drm_mm_node *prev_node;
-
- mm->scanned_blocks--;
-
- BUG_ON(!node->scanned_block);
- node->scanned_block = 0;
-
- prev_node = list_entry(node->node_list.prev, struct drm_mm_node,
- node_list);
-
- prev_node->hole_follows = node->scanned_preceeds_hole;
- INIT_LIST_HEAD(&node->node_list);
- list_add(&node->node_list, &prev_node->node_list);
-
- /* Only need to check for containement because start&size for the
- * complete resulting free block (not just the desired part) is
- * stored. */
- if (node->start >= mm->scan_hit_start &&
- node->start + node->size
- <= mm->scan_hit_start + mm->scan_hit_size) {
- return 1;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(drm_mm_scan_remove_block);
-
-int drm_mm_clean(struct drm_mm * mm)
-{
- struct list_head *head = &mm->head_node.node_list;
-
- return (head->next->next == head);
-}
-EXPORT_SYMBOL(drm_mm_clean);
-
-int drm_mm_init(struct drm_mm * mm, unsigned long start, unsigned long size)
-{
- INIT_LIST_HEAD(&mm->hole_stack);
- INIT_LIST_HEAD(&mm->unused_nodes);
- mm->num_unused = 0;
- mm->scanned_blocks = 0;
- spin_lock_init(&mm->unused_lock);
-
- /* Clever trick to avoid a special case in the free hole tracking. */
- INIT_LIST_HEAD(&mm->head_node.node_list);
- INIT_LIST_HEAD(&mm->head_node.hole_stack);
- mm->head_node.hole_follows = 1;
- mm->head_node.scanned_block = 0;
- mm->head_node.scanned_prev_free = 0;
- mm->head_node.scanned_next_free = 0;
- mm->head_node.mm = mm;
- mm->head_node.start = start + size;
- mm->head_node.size = start - mm->head_node.start;
- list_add_tail(&mm->head_node.hole_stack, &mm->hole_stack);
-
- return 0;
-}
-EXPORT_SYMBOL(drm_mm_init);
-
-void drm_mm_takedown(struct drm_mm * mm)
-{
- struct drm_mm_node *entry, *next;
-
- if (!list_empty(&mm->head_node.node_list)) {
- DRM_ERROR("Memory manager not clean. Delaying takedown\n");
- return;
- }
-
- spin_lock(&mm->unused_lock);
- list_for_each_entry_safe(entry, next, &mm->unused_nodes, node_list) {
- list_del(&entry->node_list);
- kfree(entry);
- --mm->num_unused;
- }
- spin_unlock(&mm->unused_lock);
-
- BUG_ON(mm->num_unused != 0);
-}
-EXPORT_SYMBOL(drm_mm_takedown);
-
-void drm_mm_debug_table(struct drm_mm *mm, const char *prefix)
-{
- struct drm_mm_node *entry;
- unsigned long total_used = 0, total_free = 0, total = 0;
- unsigned long hole_start, hole_end, hole_size;
-
- hole_start = drm_mm_hole_node_start(&mm->head_node);
- hole_end = drm_mm_hole_node_end(&mm->head_node);
- hole_size = hole_end - hole_start;
- if (hole_size)
- printk(KERN_DEBUG "%s 0x%08lx-0x%08lx: %8lu: free\n",
- prefix, hole_start, hole_end,
- hole_size);
- total_free += hole_size;
-
- drm_mm_for_each_node(entry, mm) {
- printk(KERN_DEBUG "%s 0x%08lx-0x%08lx: %8lu: used\n",
- prefix, entry->start, entry->start + entry->size,
- entry->size);
- total_used += entry->size;
-
- if (entry->hole_follows) {
- hole_start = drm_mm_hole_node_start(entry);
- hole_end = drm_mm_hole_node_end(entry);
- hole_size = hole_end - hole_start;
- printk(KERN_DEBUG "%s 0x%08lx-0x%08lx: %8lu: free\n",
- prefix, hole_start, hole_end,
- hole_size);
- total_free += hole_size;
- }
- }
- total = total_free + total_used;
-
- printk(KERN_DEBUG "%s total: %lu, used %lu free %lu\n", prefix, total,
- total_used, total_free);
-}
-EXPORT_SYMBOL(drm_mm_debug_table);
-
-#if defined(CONFIG_DEBUG_FS)
-int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm)
-{
- struct drm_mm_node *entry;
- unsigned long total_used = 0, total_free = 0, total = 0;
- unsigned long hole_start, hole_end, hole_size;
-
- hole_start = drm_mm_hole_node_start(&mm->head_node);
- hole_end = drm_mm_hole_node_end(&mm->head_node);
- hole_size = hole_end - hole_start;
- if (hole_size)
- seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: free\n",
- hole_start, hole_end, hole_size);
- total_free += hole_size;
-
- drm_mm_for_each_node(entry, mm) {
- seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: used\n",
- entry->start, entry->start + entry->size,
- entry->size);
- total_used += entry->size;
- if (entry->hole_follows) {
- hole_start = drm_mm_hole_node_start(entry);
- hole_end = drm_mm_hole_node_end(entry);
- hole_size = hole_end - hole_start;
- seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: free\n",
- hole_start, hole_end, hole_size);
- total_free += hole_size;
- }
- }
- total = total_free + total_used;
-
- seq_printf(m, "total: %lu, used %lu free %lu\n", total, total_used, total_free);
- return 0;
-}
-EXPORT_SYMBOL(drm_mm_dump_table);
-#endif