323 lines
10 KiB
C
Executable File
323 lines
10 KiB
C
Executable File
/**************************************************************************
|
|
*
|
|
* Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. 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.
|
|
*
|
|
*
|
|
**************************************************************************/
|
|
/*
|
|
* Authors:
|
|
* Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
|
|
*/
|
|
|
|
#ifndef _DRM_MM_H_
|
|
#define _DRM_MM_H_
|
|
|
|
/*
|
|
* Generic range manager structs
|
|
*/
|
|
#include <linux/bug.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/list.h>
|
|
#include <linux/spinlock.h>
|
|
#ifdef CONFIG_DEBUG_FS
|
|
#include <linux/seq_file.h>
|
|
#endif
|
|
|
|
enum drm_mm_search_flags {
|
|
DRM_MM_SEARCH_DEFAULT = 0,
|
|
DRM_MM_SEARCH_BEST = 1 << 0,
|
|
DRM_MM_SEARCH_BELOW = 1 << 1,
|
|
};
|
|
|
|
enum drm_mm_allocator_flags {
|
|
DRM_MM_CREATE_DEFAULT = 0,
|
|
DRM_MM_CREATE_TOP = 1 << 0,
|
|
};
|
|
|
|
#define DRM_MM_BOTTOMUP DRM_MM_SEARCH_DEFAULT, DRM_MM_CREATE_DEFAULT
|
|
#define DRM_MM_TOPDOWN DRM_MM_SEARCH_BELOW, DRM_MM_CREATE_TOP
|
|
|
|
struct drm_mm_node {
|
|
struct list_head node_list;
|
|
struct list_head hole_stack;
|
|
unsigned hole_follows : 1;
|
|
unsigned scanned_block : 1;
|
|
unsigned scanned_prev_free : 1;
|
|
unsigned scanned_next_free : 1;
|
|
unsigned scanned_preceeds_hole : 1;
|
|
unsigned allocated : 1;
|
|
unsigned long color;
|
|
unsigned long start;
|
|
unsigned long size;
|
|
struct drm_mm *mm;
|
|
};
|
|
|
|
struct drm_mm {
|
|
/* List of all memory nodes that immediately precede a free hole. */
|
|
struct list_head hole_stack;
|
|
/* head_node.node_list is the list of all memory nodes, ordered
|
|
* according to the (increasing) start address of the memory node. */
|
|
struct drm_mm_node head_node;
|
|
unsigned int scan_check_range : 1;
|
|
unsigned scan_alignment;
|
|
unsigned long scan_color;
|
|
unsigned long scan_size;
|
|
unsigned long scan_hit_start;
|
|
unsigned long scan_hit_end;
|
|
unsigned scanned_blocks;
|
|
unsigned long scan_start;
|
|
unsigned long scan_end;
|
|
struct drm_mm_node *prev_scanned_node;
|
|
|
|
void (*color_adjust)(struct drm_mm_node *node, unsigned long color,
|
|
unsigned long *start, unsigned long *end);
|
|
};
|
|
|
|
/**
|
|
* drm_mm_node_allocated - checks whether a node is allocated
|
|
* @node: drm_mm_node to check
|
|
*
|
|
* Drivers should use this helpers for proper encapusulation of drm_mm
|
|
* internals.
|
|
*
|
|
* Returns:
|
|
* True if the @node is allocated.
|
|
*/
|
|
static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
|
|
{
|
|
return node->allocated;
|
|
}
|
|
|
|
/**
|
|
* drm_mm_initialized - checks whether an allocator is initialized
|
|
* @mm: drm_mm to check
|
|
*
|
|
* Drivers should use this helpers for proper encapusulation of drm_mm
|
|
* internals.
|
|
*
|
|
* Returns:
|
|
* True if the @mm is initialized.
|
|
*/
|
|
static inline bool drm_mm_initialized(struct drm_mm *mm)
|
|
{
|
|
return mm->hole_stack.next;
|
|
}
|
|
|
|
static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_node)
|
|
{
|
|
return hole_node->start + hole_node->size;
|
|
}
|
|
|
|
/**
|
|
* drm_mm_hole_node_start - computes the start of the hole following @node
|
|
* @hole_node: drm_mm_node which implicitly tracks the following hole
|
|
*
|
|
* This is useful for driver-sepific debug dumpers. Otherwise drivers should not
|
|
* inspect holes themselves. Drivers must check first whether a hole indeed
|
|
* follows by looking at node->hole_follows.
|
|
*
|
|
* Returns:
|
|
* Start of the subsequent hole.
|
|
*/
|
|
static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node)
|
|
{
|
|
BUG_ON(!hole_node->hole_follows);
|
|
return __drm_mm_hole_node_start(hole_node);
|
|
}
|
|
|
|
static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node)
|
|
{
|
|
return list_entry(hole_node->node_list.next,
|
|
struct drm_mm_node, node_list)->start;
|
|
}
|
|
|
|
/**
|
|
* drm_mm_hole_node_end - computes the end of the hole following @node
|
|
* @hole_node: drm_mm_node which implicitly tracks the following hole
|
|
*
|
|
* This is useful for driver-sepific debug dumpers. Otherwise drivers should not
|
|
* inspect holes themselves. Drivers must check first whether a hole indeed
|
|
* follows by looking at node->hole_follows.
|
|
*
|
|
* Returns:
|
|
* End of the subsequent hole.
|
|
*/
|
|
static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
|
|
{
|
|
return __drm_mm_hole_node_end(hole_node);
|
|
}
|
|
|
|
/**
|
|
* drm_mm_for_each_node - iterator to walk over all allocated nodes
|
|
* @entry: drm_mm_node structure to assign to in each iteration step
|
|
* @mm: drm_mm allocator to walk
|
|
*
|
|
* This iterator walks over all nodes in the range allocator. It is implemented
|
|
* with list_for_each, so not save against removal of elements.
|
|
*/
|
|
#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
|
|
&(mm)->head_node.node_list, \
|
|
node_list)
|
|
|
|
/**
|
|
* drm_mm_for_each_hole - iterator to walk over all holes
|
|
* @entry: drm_mm_node used internally to track progress
|
|
* @mm: drm_mm allocator to walk
|
|
* @hole_start: ulong variable to assign the hole start to on each iteration
|
|
* @hole_end: ulong variable to assign the hole end to on each iteration
|
|
*
|
|
* This iterator walks over all holes in the range allocator. It is implemented
|
|
* with list_for_each, so not save against removal of elements. @entry is used
|
|
* internally and will not reflect a real drm_mm_node for the very first hole.
|
|
* Hence users of this iterator may not access it.
|
|
*
|
|
* Implementation Note:
|
|
* We need to inline list_for_each_entry in order to be able to set hole_start
|
|
* and hole_end on each iteration while keeping the macro sane.
|
|
*
|
|
* The __drm_mm_for_each_hole version is similar, but with added support for
|
|
* going backwards.
|
|
*/
|
|
#define drm_mm_for_each_hole(entry, mm, hole_start, hole_end) \
|
|
for (entry = list_entry((mm)->hole_stack.next, struct drm_mm_node, hole_stack); \
|
|
&entry->hole_stack != &(mm)->hole_stack ? \
|
|
hole_start = drm_mm_hole_node_start(entry), \
|
|
hole_end = drm_mm_hole_node_end(entry), \
|
|
1 : 0; \
|
|
entry = list_entry(entry->hole_stack.next, struct drm_mm_node, hole_stack))
|
|
|
|
#define __drm_mm_for_each_hole(entry, mm, hole_start, hole_end, backwards) \
|
|
for (entry = list_entry((backwards) ? (mm)->hole_stack.prev : (mm)->hole_stack.next, struct drm_mm_node, hole_stack); \
|
|
&entry->hole_stack != &(mm)->hole_stack ? \
|
|
hole_start = drm_mm_hole_node_start(entry), \
|
|
hole_end = drm_mm_hole_node_end(entry), \
|
|
1 : 0; \
|
|
entry = list_entry((backwards) ? entry->hole_stack.prev : entry->hole_stack.next, struct drm_mm_node, hole_stack))
|
|
|
|
/*
|
|
* Basic range manager support (drm_mm.c)
|
|
*/
|
|
int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node);
|
|
|
|
int drm_mm_insert_node_generic(struct drm_mm *mm,
|
|
struct drm_mm_node *node,
|
|
unsigned long size,
|
|
unsigned alignment,
|
|
unsigned long color,
|
|
enum drm_mm_search_flags sflags,
|
|
enum drm_mm_allocator_flags aflags);
|
|
/**
|
|
* drm_mm_insert_node - search for space and insert @node
|
|
* @mm: drm_mm to allocate from
|
|
* @node: preallocate node to insert
|
|
* @size: size of the allocation
|
|
* @alignment: alignment of the allocation
|
|
* @flags: flags to fine-tune the allocation
|
|
*
|
|
* This is a simplified version of drm_mm_insert_node_generic() with @color set
|
|
* to 0.
|
|
*
|
|
* The preallocated node must be cleared to 0.
|
|
*
|
|
* Returns:
|
|
* 0 on success, -ENOSPC if there's no suitable hole.
|
|
*/
|
|
static inline int drm_mm_insert_node(struct drm_mm *mm,
|
|
struct drm_mm_node *node,
|
|
unsigned long size,
|
|
unsigned alignment,
|
|
enum drm_mm_search_flags flags)
|
|
{
|
|
return drm_mm_insert_node_generic(mm, node, size, alignment, 0, flags,
|
|
DRM_MM_CREATE_DEFAULT);
|
|
}
|
|
|
|
int drm_mm_insert_node_in_range_generic(struct drm_mm *mm,
|
|
struct drm_mm_node *node,
|
|
unsigned long size,
|
|
unsigned alignment,
|
|
unsigned long color,
|
|
unsigned long start,
|
|
unsigned long end,
|
|
enum drm_mm_search_flags sflags,
|
|
enum drm_mm_allocator_flags aflags);
|
|
/**
|
|
* drm_mm_insert_node_in_range - ranged search for space and insert @node
|
|
* @mm: drm_mm to allocate from
|
|
* @node: preallocate node to insert
|
|
* @size: size of the allocation
|
|
* @alignment: alignment of the allocation
|
|
* @start: start of the allowed range for this node
|
|
* @end: end of the allowed range for this node
|
|
* @flags: flags to fine-tune the allocation
|
|
*
|
|
* This is a simplified version of drm_mm_insert_node_in_range_generic() with
|
|
* @color set to 0.
|
|
*
|
|
* The preallocated node must be cleared to 0.
|
|
*
|
|
* Returns:
|
|
* 0 on success, -ENOSPC if there's no suitable hole.
|
|
*/
|
|
static inline 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,
|
|
enum drm_mm_search_flags flags)
|
|
{
|
|
return drm_mm_insert_node_in_range_generic(mm, node, size, alignment,
|
|
0, start, end, flags,
|
|
DRM_MM_CREATE_DEFAULT);
|
|
}
|
|
|
|
void drm_mm_remove_node(struct drm_mm_node *node);
|
|
void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
|
|
void drm_mm_init(struct drm_mm *mm,
|
|
unsigned long start,
|
|
unsigned long size);
|
|
void drm_mm_takedown(struct drm_mm *mm);
|
|
bool drm_mm_clean(struct drm_mm *mm);
|
|
|
|
void drm_mm_init_scan(struct drm_mm *mm,
|
|
unsigned long size,
|
|
unsigned alignment,
|
|
unsigned long color);
|
|
void drm_mm_init_scan_with_range(struct drm_mm *mm,
|
|
unsigned long size,
|
|
unsigned alignment,
|
|
unsigned long color,
|
|
unsigned long start,
|
|
unsigned long end);
|
|
bool drm_mm_scan_add_block(struct drm_mm_node *node);
|
|
bool drm_mm_scan_remove_block(struct drm_mm_node *node);
|
|
|
|
void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
|
|
#ifdef CONFIG_DEBUG_FS
|
|
int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
|
|
#endif
|
|
|
|
#endif
|