1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015, Linaro Limited
4 * Copyright (c) 2017, EPAM Systems
6 #include <linux/device.h>
7 #include <linux/dma-buf.h>
8 #include <linux/genalloc.h>
9 #include <linux/slab.h>
10 #include <linux/tee_drv.h>
11 #include "optee_private.h"
12 #include "optee_smc.h"
15 static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
16 struct tee_shm *shm, size_t size)
18 unsigned int order = get_order(size);
21 page = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
25 shm->kaddr = page_address(page);
26 shm->paddr = page_to_phys(page);
27 shm->size = PAGE_SIZE << order;
32 static void pool_op_free(struct tee_shm_pool_mgr *poolm,
35 free_pages((unsigned long)shm->kaddr, get_order(shm->size));
39 static void pool_op_destroy_poolmgr(struct tee_shm_pool_mgr *poolm)
44 static const struct tee_shm_pool_mgr_ops pool_ops = {
45 .alloc = pool_op_alloc,
47 .destroy_poolmgr = pool_op_destroy_poolmgr,
51 * optee_shm_pool_alloc_pages() - create page-based allocator pool
53 * This pool is used when OP-TEE supports dymanic SHM. In this case
54 * command buffers and such are allocated from kernel's own memory.
56 struct tee_shm_pool_mgr *optee_shm_pool_alloc_pages(void)
58 struct tee_shm_pool_mgr *mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
61 return ERR_PTR(-ENOMEM);