Replaces the shared memory pool based on two pools with a single pool.
The alloc() function pointer in struct tee_shm_pool_ops gets another
parameter, align. This makes it possible to make less than page aligned
allocations from the optional reserved shared memory pool while still
making user space allocations page aligned. With in practice unchanged
behaviour using only a single pool for bookkeeping.
The allocation algorithm in the static OP-TEE shared memory pool is
changed from best-fit to first-fit since only the latter supports an
alignment parameter. The best-fit algorithm was previously the default
choice and not a conscious one.
The optee and amdtee drivers are updated as needed to work with this
changed pool handling.
This also removes OPTEE_SHM_NUM_PRIV_PAGES which becomes obsolete with
this change as the private pages can be mixed with the payload pages.
The OP-TEE driver changes minimum alignment for argument struct from 8
bytes to 512 bytes. A typical OP-TEE private shm allocation is 224 bytes
(argument struct with 6 parameters, needed for open session). So with an
alignment of 512 well waste a bit more than 50%. Before this we had a
single page reserved for this so worst case usage compared to that would
be 3 pages instead of 1 page. However, this worst case only occurs if
there is a high pressure from multiple threads on secure world. All in
all this should scale up and down better than fixed boundaries.
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
#include <linux/psp-sev.h>
#include "amdtee_private.h"
-static int pool_op_alloc(struct tee_shm_pool_mgr *poolm, struct tee_shm *shm,
- size_t size)
+static int pool_op_alloc(struct tee_shm_pool *pool, struct tee_shm *shm,
+ size_t size, size_t align)
{
unsigned int order = get_order(size);
unsigned long va;
int rc;
+ /*
+ * Ignore alignment since this is already going to be page aligned
+ * and there's no need for any larger alignment.
+ */
va = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!va)
return -ENOMEM;
return 0;
}
-static void pool_op_free(struct tee_shm_pool_mgr *poolm, struct tee_shm *shm)
+static void pool_op_free(struct tee_shm_pool *pool, struct tee_shm *shm)
{
/* Unmap the shared memory from TEE */
amdtee_unmap_shmem(shm);
shm->kaddr = NULL;
}
-static void pool_op_destroy_poolmgr(struct tee_shm_pool_mgr *poolm)
+static void pool_op_destroy_pool(struct tee_shm_pool *pool)
{
- kfree(poolm);
+ kfree(pool);
}
-static const struct tee_shm_pool_mgr_ops pool_ops = {
+static const struct tee_shm_pool_ops pool_ops = {
.alloc = pool_op_alloc,
.free = pool_op_free,
- .destroy_poolmgr = pool_op_destroy_poolmgr,
+ .destroy_pool = pool_op_destroy_pool,
};
-static struct tee_shm_pool_mgr *pool_mem_mgr_alloc(void)
-{
- struct tee_shm_pool_mgr *mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
-
- if (!mgr)
- return ERR_PTR(-ENOMEM);
-
- mgr->ops = &pool_ops;
-
- return mgr;
-}
-
struct tee_shm_pool *amdtee_config_shm(void)
{
- struct tee_shm_pool_mgr *priv_mgr;
- struct tee_shm_pool_mgr *dmabuf_mgr;
- void *rc;
+ struct tee_shm_pool *pool = kzalloc(sizeof(*pool), GFP_KERNEL);
- rc = pool_mem_mgr_alloc();
- if (IS_ERR(rc))
- return rc;
- priv_mgr = rc;
-
- rc = pool_mem_mgr_alloc();
- if (IS_ERR(rc)) {
- tee_shm_pool_mgr_destroy(priv_mgr);
- return rc;
- }
- dmabuf_mgr = rc;
+ if (!pool)
+ return ERR_PTR(-ENOMEM);
- rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
- if (IS_ERR(rc)) {
- tee_shm_pool_mgr_destroy(priv_mgr);
- tee_shm_pool_mgr_destroy(dmabuf_mgr);
- }
+ pool->ops = &pool_ops;
- return rc;
+ return pool;
}
help
This implements the OP-TEE Trusted Execution Environment (TEE)
driver.
-
-config OPTEE_SHM_NUM_PRIV_PAGES
- int "Private Shared Memory Pages"
- default 1
- depends on OPTEE
- help
- This sets the number of private shared memory pages to be
- used by OP-TEE TEE driver.
#include <linux/workqueue.h>
#include "optee_private.h"
-int optee_pool_op_alloc_helper(struct tee_shm_pool_mgr *poolm,
- struct tee_shm *shm, size_t size,
+int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
+ size_t size, size_t align,
int (*shm_register)(struct tee_context *ctx,
struct tee_shm *shm,
struct page **pages,
struct page *page;
int rc = 0;
+ /*
+ * Ignore alignment since this is already going to be page aligned
+ * and there's no need for any larger alignment.
+ */
page = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!page)
return -ENOMEM;
for (i = 0; i < nr_pages; i++)
pages[i] = page + i;
- shm->flags |= TEE_SHM_REGISTER;
rc = shm_register(shm->ctx, shm, pages, nr_pages,
(unsigned long)shm->kaddr);
kfree(pages);
return 0;
err:
- __free_pages(page, order);
+ free_pages((unsigned long)shm->kaddr, order);
return rc;
}
* The main function is optee_ffa_shm_pool_alloc_pages().
*/
-static int pool_ffa_op_alloc(struct tee_shm_pool_mgr *poolm,
- struct tee_shm *shm, size_t size)
+static int pool_ffa_op_alloc(struct tee_shm_pool *pool,
+ struct tee_shm *shm, size_t size, size_t align)
{
- return optee_pool_op_alloc_helper(poolm, shm, size,
+ return optee_pool_op_alloc_helper(pool, shm, size, align,
optee_ffa_shm_register);
}
-static void pool_ffa_op_free(struct tee_shm_pool_mgr *poolm,
+static void pool_ffa_op_free(struct tee_shm_pool *pool,
struct tee_shm *shm)
{
optee_ffa_shm_unregister(shm->ctx, shm);
shm->kaddr = NULL;
}
-static void pool_ffa_op_destroy_poolmgr(struct tee_shm_pool_mgr *poolm)
+static void pool_ffa_op_destroy_pool(struct tee_shm_pool *pool)
{
- kfree(poolm);
+ kfree(pool);
}
-static const struct tee_shm_pool_mgr_ops pool_ffa_ops = {
+static const struct tee_shm_pool_ops pool_ffa_ops = {
.alloc = pool_ffa_op_alloc,
.free = pool_ffa_op_free,
- .destroy_poolmgr = pool_ffa_op_destroy_poolmgr,
+ .destroy_pool = pool_ffa_op_destroy_pool,
};
/**
* This pool is used with OP-TEE over FF-A. In this case command buffers
* and such are allocated from kernel's own memory.
*/
-static struct tee_shm_pool_mgr *optee_ffa_shm_pool_alloc_pages(void)
+static struct tee_shm_pool *optee_ffa_shm_pool_alloc_pages(void)
{
- struct tee_shm_pool_mgr *mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
+ struct tee_shm_pool *pool = kzalloc(sizeof(*pool), GFP_KERNEL);
- if (!mgr)
+ if (!pool)
return ERR_PTR(-ENOMEM);
- mgr->ops = &pool_ffa_ops;
+ pool->ops = &pool_ffa_ops;
- return mgr;
+ return pool;
}
/*
return true;
}
-static struct tee_shm_pool *optee_ffa_config_dyn_shm(void)
-{
- struct tee_shm_pool_mgr *priv_mgr;
- struct tee_shm_pool_mgr *dmabuf_mgr;
- void *rc;
-
- rc = optee_ffa_shm_pool_alloc_pages();
- if (IS_ERR(rc))
- return rc;
- priv_mgr = rc;
-
- rc = optee_ffa_shm_pool_alloc_pages();
- if (IS_ERR(rc)) {
- tee_shm_pool_mgr_destroy(priv_mgr);
- return rc;
- }
- dmabuf_mgr = rc;
-
- rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
- if (IS_ERR(rc)) {
- tee_shm_pool_mgr_destroy(priv_mgr);
- tee_shm_pool_mgr_destroy(dmabuf_mgr);
- }
-
- return rc;
-}
-
static void optee_ffa_get_version(struct tee_device *teedev,
struct tee_ioctl_version_data *vers)
{
if (!optee)
return -ENOMEM;
- pool = optee_ffa_config_dyn_shm();
+ pool = optee_ffa_shm_pool_alloc_pages();
if (IS_ERR(pool)) {
rc = PTR_ERR(pool);
goto err_free_optee;
int optee_enumerate_devices(u32 func);
void optee_unregister_devices(void);
-int optee_pool_op_alloc_helper(struct tee_shm_pool_mgr *poolm,
- struct tee_shm *shm, size_t size,
+int optee_pool_op_alloc_helper(struct tee_shm_pool *pool, struct tee_shm *shm,
+ size_t size, size_t align,
int (*shm_register)(struct tee_context *ctx,
struct tee_shm *shm,
struct page **pages,
* 6. Driver initialization.
*/
-#define OPTEE_SHM_NUM_PRIV_PAGES CONFIG_OPTEE_SHM_NUM_PRIV_PAGES
+/*
+ * A typical OP-TEE private shm allocation is 224 bytes (argument struct
+ * with 6 parameters, needed for open session). So with an alignment of 512
+ * we'll waste a bit more than 50%. However, it's only expected that we'll
+ * have a handful of these structs allocated at a time. Most memory will
+ * be allocated aligned to the page size, So all in all this should scale
+ * up and down quite well.
+ */
+#define OPTEE_MIN_STATIC_POOL_ALIGN 9 /* 512 bytes aligned */
/*
* 1. Convert between struct tee_param and struct optee_msg_param
* The main function is optee_shm_pool_alloc_pages().
*/
-static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
- struct tee_shm *shm, size_t size)
+static int pool_op_alloc(struct tee_shm_pool *pool,
+ struct tee_shm *shm, size_t size, size_t align)
{
/*
* Shared memory private to the OP-TEE driver doesn't need
* to be registered with OP-TEE.
*/
if (shm->flags & TEE_SHM_PRIV)
- return optee_pool_op_alloc_helper(poolm, shm, size, NULL);
+ return optee_pool_op_alloc_helper(pool, shm, size, align, NULL);
- return optee_pool_op_alloc_helper(poolm, shm, size, optee_shm_register);
+ return optee_pool_op_alloc_helper(pool, shm, size, align,
+ optee_shm_register);
}
-static void pool_op_free(struct tee_shm_pool_mgr *poolm,
+static void pool_op_free(struct tee_shm_pool *pool,
struct tee_shm *shm)
{
if (!(shm->flags & TEE_SHM_PRIV))
shm->kaddr = NULL;
}
-static void pool_op_destroy_poolmgr(struct tee_shm_pool_mgr *poolm)
+static void pool_op_destroy_pool(struct tee_shm_pool *pool)
{
- kfree(poolm);
+ kfree(pool);
}
-static const struct tee_shm_pool_mgr_ops pool_ops = {
+static const struct tee_shm_pool_ops pool_ops = {
.alloc = pool_op_alloc,
.free = pool_op_free,
- .destroy_poolmgr = pool_op_destroy_poolmgr,
+ .destroy_pool = pool_op_destroy_pool,
};
/**
* This pool is used when OP-TEE supports dymanic SHM. In this case
* command buffers and such are allocated from kernel's own memory.
*/
-static struct tee_shm_pool_mgr *optee_shm_pool_alloc_pages(void)
+static struct tee_shm_pool *optee_shm_pool_alloc_pages(void)
{
- struct tee_shm_pool_mgr *mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
+ struct tee_shm_pool *pool = kzalloc(sizeof(*pool), GFP_KERNEL);
- if (!mgr)
+ if (!pool)
return ERR_PTR(-ENOMEM);
- mgr->ops = &pool_ops;
+ pool->ops = &pool_ops;
- return mgr;
+ return pool;
}
/*
return true;
}
-static struct tee_shm_pool *optee_config_dyn_shm(void)
-{
- struct tee_shm_pool_mgr *priv_mgr;
- struct tee_shm_pool_mgr *dmabuf_mgr;
- void *rc;
-
- rc = optee_shm_pool_alloc_pages();
- if (IS_ERR(rc))
- return rc;
- priv_mgr = rc;
-
- rc = optee_shm_pool_alloc_pages();
- if (IS_ERR(rc)) {
- tee_shm_pool_mgr_destroy(priv_mgr);
- return rc;
- }
- dmabuf_mgr = rc;
-
- rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
- if (IS_ERR(rc)) {
- tee_shm_pool_mgr_destroy(priv_mgr);
- tee_shm_pool_mgr_destroy(dmabuf_mgr);
- }
-
- return rc;
-}
-
static struct tee_shm_pool *
optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm)
{
phys_addr_t begin;
phys_addr_t end;
void *va;
- struct tee_shm_pool_mgr *priv_mgr;
- struct tee_shm_pool_mgr *dmabuf_mgr;
void *rc;
- const int sz = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE;
invoke_fn(OPTEE_SMC_GET_SHM_CONFIG, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
if (res.result.status != OPTEE_SMC_RETURN_OK) {
paddr = begin;
size = end - begin;
- if (size < 2 * OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE) {
- pr_err("too small shared memory area\n");
- return ERR_PTR(-EINVAL);
- }
-
va = memremap(paddr, size, MEMREMAP_WB);
if (!va) {
pr_err("shared memory ioremap failed\n");
}
vaddr = (unsigned long)va;
- rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, sz,
- 3 /* 8 bytes aligned */);
- if (IS_ERR(rc))
- goto err_memunmap;
- priv_mgr = rc;
-
- vaddr += sz;
- paddr += sz;
- size -= sz;
-
- rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, size, PAGE_SHIFT);
- if (IS_ERR(rc))
- goto err_free_priv_mgr;
- dmabuf_mgr = rc;
-
- rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
+ rc = tee_shm_pool_alloc_res_mem(vaddr, paddr, size,
+ OPTEE_MIN_STATIC_POOL_ALIGN);
if (IS_ERR(rc))
- goto err_free_dmabuf_mgr;
-
- *memremaped_shm = va;
-
- return rc;
+ memunmap(va);
+ else
+ *memremaped_shm = va;
-err_free_dmabuf_mgr:
- tee_shm_pool_mgr_destroy(dmabuf_mgr);
-err_free_priv_mgr:
- tee_shm_pool_mgr_destroy(priv_mgr);
-err_memunmap:
- memunmap(va);
return rc;
}
* Try to use dynamic shared memory if possible
*/
if (sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
- pool = optee_config_dyn_shm();
+ pool = optee_shm_pool_alloc_pages();
/*
* If dynamic shared memory is not available or failed - try static one
#include <linux/mutex.h>
#include <linux/types.h>
-/**
- * struct tee_shm_pool - shared memory pool
- * @private_mgr: pool manager for shared memory only between kernel
- * and secure world
- * @dma_buf_mgr: pool manager for shared memory exported to user space
- */
-struct tee_shm_pool {
- struct tee_shm_pool_mgr *private_mgr;
- struct tee_shm_pool_mgr *dma_buf_mgr;
-};
-
#define TEE_DEVICE_FLAG_REGISTERED 0x1
#define TEE_MAX_DEV_NAME_LEN 32
static void tee_shm_release(struct tee_device *teedev, struct tee_shm *shm)
{
if (shm->flags & TEE_SHM_POOL) {
- struct tee_shm_pool_mgr *poolm;
-
- if (shm->flags & TEE_SHM_DMA_BUF)
- poolm = teedev->pool->dma_buf_mgr;
- else
- poolm = teedev->pool->private_mgr;
-
- poolm->ops->free(poolm, shm);
+ teedev->pool->ops->free(teedev->pool, shm);
} else if (shm->flags & TEE_SHM_REGISTER) {
int rc = teedev->desc->ops->shm_unregister(shm->ctx, shm);
struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
{
struct tee_device *teedev = ctx->teedev;
- struct tee_shm_pool_mgr *poolm = NULL;
struct tee_shm *shm;
+ size_t align;
void *ret;
int rc;
refcount_set(&shm->refcount, 1);
shm->flags = flags | TEE_SHM_POOL;
shm->ctx = ctx;
- if (flags & TEE_SHM_DMA_BUF)
- poolm = teedev->pool->dma_buf_mgr;
- else
- poolm = teedev->pool->private_mgr;
+ if (flags & TEE_SHM_DMA_BUF) {
+ align = PAGE_SIZE;
+ /*
+ * Request to register the shm in the pool allocator below
+ * if supported.
+ */
+ shm->flags |= TEE_SHM_REGISTER;
+ } else {
+ align = 2 * sizeof(long);
+ }
- rc = poolm->ops->alloc(poolm, shm, size);
+ rc = teedev->pool->ops->alloc(teedev->pool, shm, size, align);
if (rc) {
ret = ERR_PTR(rc);
goto err_kfree;
return shm;
err_pool_free:
- poolm->ops->free(poolm, shm);
+ teedev->pool->ops->free(teedev->pool, shm);
err_kfree:
kfree(shm);
err_dev_put:
// SPDX-License-Identifier: GPL-2.0-only
/*
- * Copyright (c) 2015 Linaro Limited
+ * Copyright (c) 2015, 2017, 2022 Linaro Limited
*/
#include <linux/device.h>
#include <linux/dma-buf.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)
+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 = poolm->private_data;
- size_t s = roundup(size, 1 << genpool->min_alloc_order);
+ 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(genpool, s);
+ va = gen_pool_alloc_algo(genpool, s, gen_pool_first_fit_align, &data);
if (!va)
return -ENOMEM;
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_REGISTER;
return 0;
}
-static void pool_op_gen_free(struct tee_shm_pool_mgr *poolm,
- struct tee_shm *shm)
+static void pool_op_gen_free(struct tee_shm_pool *pool, struct tee_shm *shm)
{
- gen_pool_free(poolm->private_data, (unsigned long)shm->kaddr,
+ gen_pool_free(pool->private_data, (unsigned long)shm->kaddr,
shm->size);
shm->kaddr = NULL;
}
-static void pool_op_gen_destroy_poolmgr(struct tee_shm_pool_mgr *poolm)
+static void pool_op_gen_destroy_pool(struct tee_shm_pool *pool)
{
- gen_pool_destroy(poolm->private_data);
- kfree(poolm);
+ gen_pool_destroy(pool->private_data);
+ kfree(pool);
}
-static const struct tee_shm_pool_mgr_ops pool_ops_generic = {
+static const struct tee_shm_pool_ops pool_ops_generic = {
.alloc = pool_op_gen_alloc,
.free = pool_op_gen_free,
- .destroy_poolmgr = pool_op_gen_destroy_poolmgr,
+ .destroy_pool = pool_op_gen_destroy_pool,
};
-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)
+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_mgr *mgr;
+ 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);
- mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
- if (!mgr)
+ pool = kzalloc(sizeof(*pool), GFP_KERNEL);
+ if (!pool)
return ERR_PTR(-ENOMEM);
- mgr->private_data = gen_pool_create(min_alloc_order, -1);
- if (!mgr->private_data) {
+ pool->private_data = gen_pool_create(min_alloc_order, -1);
+ if (!pool->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);
+ rc = gen_pool_add_virt(pool->private_data, vaddr, paddr, size, -1);
if (rc) {
- gen_pool_destroy(mgr->private_data);
+ gen_pool_destroy(pool->private_data);
goto err;
}
- mgr->ops = &pool_ops_generic;
+ pool->ops = &pool_ops_generic;
- return mgr;
+ return pool;
err:
- kfree(mgr);
+ kfree(pool);
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);
+EXPORT_SYMBOL_GPL(tee_shm_pool_alloc_res_mem);
/* SPDX-License-Identifier: GPL-2.0-only */
/*
- * Copyright (c) 2015-2016 Linaro Limited
+ * Copyright (c) 2015-2022 Linaro Limited
*/
#ifndef __TEE_DRV_H
};
/**
- * struct tee_shm_pool_mgr - shared memory manager
+ * struct tee_shm_pool - shared memory pool
* @ops: operations
* @private_data: private data for the shared memory manager
*/
-struct tee_shm_pool_mgr {
- const struct tee_shm_pool_mgr_ops *ops;
+struct tee_shm_pool {
+ const struct tee_shm_pool_ops *ops;
void *private_data;
};
/**
- * struct tee_shm_pool_mgr_ops - shared memory pool manager operations
+ * struct tee_shm_pool_ops - shared memory pool operations
* @alloc: called when allocating shared memory
* @free: called when freeing shared memory
- * @destroy_poolmgr: called when destroying the pool manager
+ * @destroy_pool: called when destroying the pool
*/
-struct tee_shm_pool_mgr_ops {
- int (*alloc)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm,
- size_t size);
- void (*free)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm);
- void (*destroy_poolmgr)(struct tee_shm_pool_mgr *poolmgr);
+struct tee_shm_pool_ops {
+ int (*alloc)(struct tee_shm_pool *pool, struct tee_shm *shm,
+ size_t size, size_t align);
+ void (*free)(struct tee_shm_pool *pool, struct tee_shm *shm);
+ void (*destroy_pool)(struct tee_shm_pool *pool);
};
-/**
- * tee_shm_pool_alloc() - Create a shared memory pool from shm managers
- * @priv_mgr: manager for driver private shared memory allocations
- * @dmabuf_mgr: manager for dma-buf shared memory allocations
- *
- * 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(struct tee_shm_pool_mgr *priv_mgr,
- struct tee_shm_pool_mgr *dmabuf_mgr);
-
/*
- * tee_shm_pool_mgr_alloc_res_mem() - Create a shm manager for reserved
- * memory
+ * tee_shm_pool_alloc_res_mem() - Create a shm manager for reserved memory
* @vaddr: Virtual address of start of pool
* @paddr: Physical address of start of pool
* @size: Size in bytes of the pool
*
- * @returns pointer to a 'struct tee_shm_pool_mgr' or an ERR_PTR on failure.
- */
-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);
-
-/**
- * tee_shm_pool_mgr_destroy() - Free a shared memory manager
+ * @returns pointer to a 'struct tee_shm_pool' or an ERR_PTR on failure.
*/
-static inline void tee_shm_pool_mgr_destroy(struct tee_shm_pool_mgr *poolm)
-{
- poolm->ops->destroy_poolmgr(poolm);
-}
+struct tee_shm_pool *tee_shm_pool_alloc_res_mem(unsigned long vaddr,
+ phys_addr_t paddr, size_t size,
+ int min_alloc_order);
/**
* tee_shm_pool_free() - Free a shared memory pool
* The 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);
+static inline void tee_shm_pool_free(struct tee_shm_pool *pool)
+{
+ pool->ops->destroy_pool(pool);
+}
/**
* tee_get_drvdata() - Return driver_data pointer
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