mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-23 01:50:07 +03:00
55295c6087
Remove functions that are not used in gk20a allocator. Bug 1523403 Change-Id: I36b2b236258d61602cb3283b59c43b40f237d514 Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: http://git-master/r/432174
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
|
|
* gk20a allocator
|
|
*
|
|
* Copyright (c) 2011-2014, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __NVHOST_ALLOCATOR_H__
|
|
#define __NVHOST_ALLOCATOR_H__
|
|
|
|
#include <linux/rbtree.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/slab.h>
|
|
|
|
/* #define ALLOCATOR_DEBUG */
|
|
|
|
/* main struct */
|
|
struct gk20a_allocator {
|
|
|
|
char name[32]; /* name for allocator */
|
|
struct rb_root rb_root; /* rb tree root for blocks */
|
|
|
|
u32 base; /* min value of this linear space */
|
|
u32 limit; /* max value = limit - 1 */
|
|
u32 align; /* alignment size, power of 2 */
|
|
|
|
struct gk20a_alloc_block *block_first; /* first block in list */
|
|
struct gk20a_alloc_block *block_recent; /* last visited block */
|
|
|
|
u32 first_free_addr; /* first free addr, non-contigous
|
|
allocation preferred start,
|
|
in order to pick up small holes */
|
|
u32 last_free_addr; /* last free addr, contiguous
|
|
allocation preferred start */
|
|
u32 cached_hole_size; /* max free hole size up to
|
|
last_free_addr */
|
|
u32 block_count; /* number of blocks */
|
|
|
|
struct rw_semaphore rw_sema; /* lock */
|
|
struct kmem_cache *block_cache; /* slab cache */
|
|
|
|
/* if enabled, constrain to [base, limit) */
|
|
struct {
|
|
bool enable;
|
|
u32 base;
|
|
u32 limit;
|
|
} constraint;
|
|
|
|
int (*alloc)(struct gk20a_allocator *allocator,
|
|
u32 *addr, u32 len);
|
|
int (*free)(struct gk20a_allocator *allocator,
|
|
u32 addr, u32 len);
|
|
|
|
};
|
|
|
|
/* a block of linear space range [start, end) */
|
|
struct gk20a_alloc_block {
|
|
struct gk20a_allocator *allocator; /* parent allocator */
|
|
struct rb_node rb; /* rb tree node */
|
|
|
|
u32 start; /* linear space range
|
|
[start, end) */
|
|
u32 end;
|
|
|
|
void *priv; /* backing structure for this
|
|
linear space block
|
|
page table, comp tag, etc */
|
|
|
|
struct gk20a_alloc_block *prev; /* prev block with lower address */
|
|
struct gk20a_alloc_block *next; /* next block with higher address */
|
|
|
|
bool nc_block;
|
|
struct gk20a_alloc_block *nc_prev; /* prev block for
|
|
non-contiguous allocation */
|
|
struct gk20a_alloc_block *nc_next; /* next block for
|
|
non-contiguous allocation */
|
|
};
|
|
|
|
int gk20a_allocator_init(struct gk20a_allocator *allocator,
|
|
const char *name, u32 base, u32 size, u32 align);
|
|
void gk20a_allocator_destroy(struct gk20a_allocator *allocator);
|
|
|
|
int gk20a_allocator_block_alloc(struct gk20a_allocator *allocator,
|
|
u32 *addr, u32 len);
|
|
|
|
int gk20a_allocator_block_free(struct gk20a_allocator *allocator,
|
|
u32 addr, u32 len);
|
|
|
|
#if defined(ALLOCATOR_DEBUG)
|
|
|
|
#define allocator_dbg(alloctor, format, arg...) \
|
|
do { \
|
|
if (1) \
|
|
pr_debug("gk20a_allocator (%s) %s: " format "\n",\
|
|
alloctor->name, __func__, ##arg);\
|
|
} while (0)
|
|
|
|
#else /* ALLOCATOR_DEBUG */
|
|
|
|
#define allocator_dbg(format, arg...)
|
|
|
|
#endif /* ALLOCATOR_DEBUG */
|
|
|
|
#endif /*__NVHOST_ALLOCATOR_H__ */
|