mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
e2aca5d892
Makes creation of shm pools more flexible by adding new more primitive functions to allocate a shm pool. This makes it easier to add driver specific shm pool management. Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com>
196 lines
4.9 KiB
C
196 lines
4.9 KiB
C
/*
|
|
* Copyright (c) 2015, Linaro Limited
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that 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.
|
|
*
|
|
*/
|
|
#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_mgr *poolm,
|
|
struct tee_shm *shm, size_t size)
|
|
{
|
|
unsigned long va;
|
|
struct gen_pool *genpool = poolm->private_data;
|
|
size_t s = roundup(size, 1 << genpool->min_alloc_order);
|
|
|
|
va = gen_pool_alloc(genpool, s);
|
|
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;
|
|
return 0;
|
|
}
|
|
|
|
static void pool_op_gen_free(struct tee_shm_pool_mgr *poolm,
|
|
struct tee_shm *shm)
|
|
{
|
|
gen_pool_free(poolm->private_data, (unsigned long)shm->kaddr,
|
|
shm->size);
|
|
shm->kaddr = NULL;
|
|
}
|
|
|
|
static void pool_op_gen_destroy_poolmgr(struct tee_shm_pool_mgr *poolm)
|
|
{
|
|
gen_pool_destroy(poolm->private_data);
|
|
kfree(poolm);
|
|
}
|
|
|
|
static const struct tee_shm_pool_mgr_ops pool_ops_generic = {
|
|
.alloc = pool_op_gen_alloc,
|
|
.free = pool_op_gen_free,
|
|
.destroy_poolmgr = pool_op_gen_destroy_poolmgr,
|
|
};
|
|
|
|
/**
|
|
* tee_shm_pool_alloc_res_mem() - Create a shared memory pool from reserved
|
|
* memory range
|
|
* @priv_info: Information for driver private shared memory pool
|
|
* @dmabuf_info: Information for dma-buf shared memory pool
|
|
*
|
|
* Start and end of pools will must be page aligned.
|
|
*
|
|
* Allocation with the flag TEE_SHM_DMA_BUF set will use the range supplied
|
|
* in @dmabuf, others will use the range provided by @priv.
|
|
*
|
|
* @returns pointer to a 'struct tee_shm_pool' or an ERR_PTR on failure.
|
|
*/
|
|
struct tee_shm_pool *
|
|
tee_shm_pool_alloc_res_mem(struct tee_shm_pool_mem_info *priv_info,
|
|
struct tee_shm_pool_mem_info *dmabuf_info)
|
|
{
|
|
struct tee_shm_pool_mgr *priv_mgr;
|
|
struct tee_shm_pool_mgr *dmabuf_mgr;
|
|
void *rc;
|
|
|
|
/*
|
|
* Create the pool for driver private shared memory
|
|
*/
|
|
rc = tee_shm_pool_mgr_alloc_res_mem(priv_info->vaddr, priv_info->paddr,
|
|
priv_info->size,
|
|
3 /* 8 byte aligned */);
|
|
if (IS_ERR(rc))
|
|
return rc;
|
|
priv_mgr = rc;
|
|
|
|
/*
|
|
* Create the pool for dma_buf shared memory
|
|
*/
|
|
rc = tee_shm_pool_mgr_alloc_res_mem(dmabuf_info->vaddr,
|
|
dmabuf_info->paddr,
|
|
dmabuf_info->size, PAGE_SHIFT);
|
|
if (IS_ERR(rc))
|
|
goto err_free_priv_mgr;
|
|
dmabuf_mgr = rc;
|
|
|
|
rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
|
|
if (IS_ERR(rc))
|
|
goto err_free_dmabuf_mgr;
|
|
|
|
return rc;
|
|
|
|
err_free_dmabuf_mgr:
|
|
tee_shm_pool_mgr_destroy(dmabuf_mgr);
|
|
err_free_priv_mgr:
|
|
tee_shm_pool_mgr_destroy(priv_mgr);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tee_shm_pool_alloc_res_mem);
|
|
|
|
struct tee_shm_pool_mgr *tee_shm_pool_mgr_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_mgr *mgr;
|
|
int rc;
|
|
|
|
/* Start and end must be page aligned */
|
|
if (vaddr & page_mask || paddr & page_mask || size & page_mask)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
|
|
if (!mgr)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
mgr->private_data = gen_pool_create(min_alloc_order, -1);
|
|
if (!mgr->private_data) {
|
|
rc = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
gen_pool_set_algo(mgr->private_data, gen_pool_best_fit, NULL);
|
|
rc = gen_pool_add_virt(mgr->private_data, vaddr, paddr, size, -1);
|
|
if (rc) {
|
|
gen_pool_destroy(mgr->private_data);
|
|
goto err;
|
|
}
|
|
|
|
mgr->ops = &pool_ops_generic;
|
|
|
|
return mgr;
|
|
err:
|
|
kfree(mgr);
|
|
|
|
return ERR_PTR(rc);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tee_shm_pool_mgr_alloc_res_mem);
|
|
|
|
static bool check_mgr_ops(struct tee_shm_pool_mgr *mgr)
|
|
{
|
|
return mgr && mgr->ops && mgr->ops->alloc && mgr->ops->free &&
|
|
mgr->ops->destroy_poolmgr;
|
|
}
|
|
|
|
struct tee_shm_pool *tee_shm_pool_alloc(struct tee_shm_pool_mgr *priv_mgr,
|
|
struct tee_shm_pool_mgr *dmabuf_mgr)
|
|
{
|
|
struct tee_shm_pool *pool;
|
|
|
|
if (!check_mgr_ops(priv_mgr) || !check_mgr_ops(dmabuf_mgr))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
pool = kzalloc(sizeof(*pool), GFP_KERNEL);
|
|
if (!pool)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
pool->private_mgr = priv_mgr;
|
|
pool->dma_buf_mgr = dmabuf_mgr;
|
|
|
|
return pool;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tee_shm_pool_alloc);
|
|
|
|
/**
|
|
* tee_shm_pool_free() - Free a shared memory pool
|
|
* @pool: The shared memory pool to free
|
|
*
|
|
* There must be no remaining shared memory allocated from this pool when
|
|
* this function is called.
|
|
*/
|
|
void tee_shm_pool_free(struct tee_shm_pool *pool)
|
|
{
|
|
if (pool->private_mgr)
|
|
tee_shm_pool_mgr_destroy(pool->private_mgr);
|
|
if (pool->dma_buf_mgr)
|
|
tee_shm_pool_mgr_destroy(pool->dma_buf_mgr);
|
|
kfree(pool);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tee_shm_pool_free);
|