mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-30 15:44:13 +08:00
a45ea4efa3
Removes the redundant TEE_SHM_DMA_BUF, TEE_SHM_EXT_DMA_BUF, TEE_SHM_MAPPED and TEE_SHM_KERNEL_MAPPED flags. TEE_SHM_REGISTER is renamed to TEE_SHM_DYNAMIC in order to better match its usage. Assigns new values to the remaining flags to void gaps. Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2015, 2017, 2022 Linaro Limited
|
|
*/
|
|
#include <linux/device.h>
|
|
#include <linux/dma-buf.h>
|
|
#include <linux/genalloc.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/tee_drv.h>
|
|
#include "tee_private.h"
|
|
|
|
static int pool_op_gen_alloc(struct tee_shm_pool *pool, struct tee_shm *shm,
|
|
size_t size, size_t align)
|
|
{
|
|
unsigned long va;
|
|
struct gen_pool *genpool = pool->private_data;
|
|
size_t a = max_t(size_t, align, BIT(genpool->min_alloc_order));
|
|
struct genpool_data_align data = { .align = a };
|
|
size_t s = roundup(size, a);
|
|
|
|
va = gen_pool_alloc_algo(genpool, s, gen_pool_first_fit_align, &data);
|
|
if (!va)
|
|
return -ENOMEM;
|
|
|
|
memset((void *)va, 0, s);
|
|
shm->kaddr = (void *)va;
|
|
shm->paddr = gen_pool_virt_to_phys(genpool, va);
|
|
shm->size = s;
|
|
/*
|
|
* This is from a static shared memory pool so no need to register
|
|
* each chunk, and no need to unregister later either.
|
|
*/
|
|
shm->flags &= ~TEE_SHM_DYNAMIC;
|
|
return 0;
|
|
}
|
|
|
|
static void pool_op_gen_free(struct tee_shm_pool *pool, struct tee_shm *shm)
|
|
{
|
|
gen_pool_free(pool->private_data, (unsigned long)shm->kaddr,
|
|
shm->size);
|
|
shm->kaddr = NULL;
|
|
}
|
|
|
|
static void pool_op_gen_destroy_pool(struct tee_shm_pool *pool)
|
|
{
|
|
gen_pool_destroy(pool->private_data);
|
|
kfree(pool);
|
|
}
|
|
|
|
static const struct tee_shm_pool_ops pool_ops_generic = {
|
|
.alloc = pool_op_gen_alloc,
|
|
.free = pool_op_gen_free,
|
|
.destroy_pool = pool_op_gen_destroy_pool,
|
|
};
|
|
|
|
struct tee_shm_pool *tee_shm_pool_alloc_res_mem(unsigned long vaddr,
|
|
phys_addr_t paddr, size_t size,
|
|
int min_alloc_order)
|
|
{
|
|
const size_t page_mask = PAGE_SIZE - 1;
|
|
struct tee_shm_pool *pool;
|
|
int rc;
|
|
|
|
/* Start and end must be page aligned */
|
|
if (vaddr & page_mask || paddr & page_mask || size & page_mask)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
pool = kzalloc(sizeof(*pool), GFP_KERNEL);
|
|
if (!pool)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
pool->private_data = gen_pool_create(min_alloc_order, -1);
|
|
if (!pool->private_data) {
|
|
rc = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
rc = gen_pool_add_virt(pool->private_data, vaddr, paddr, size, -1);
|
|
if (rc) {
|
|
gen_pool_destroy(pool->private_data);
|
|
goto err;
|
|
}
|
|
|
|
pool->ops = &pool_ops_generic;
|
|
|
|
return pool;
|
|
err:
|
|
kfree(pool);
|
|
|
|
return ERR_PTR(rc);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tee_shm_pool_alloc_res_mem);
|