tee: flexible shared memory pool creation
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>
This commit is contained in:
parent
50c4c4e268
commit
e2aca5d892
|
@ -21,68 +21,15 @@
|
|||
#include <linux/mutex.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
struct tee_device;
|
||||
|
||||
/**
|
||||
* struct tee_shm - shared memory object
|
||||
* @teedev: device used to allocate the object
|
||||
* @ctx: context using the object, if NULL the context is gone
|
||||
* @link link element
|
||||
* @paddr: physical address of the shared memory
|
||||
* @kaddr: virtual address of the shared memory
|
||||
* @size: size of shared memory
|
||||
* @dmabuf: dmabuf used to for exporting to user space
|
||||
* @flags: defined by TEE_SHM_* in tee_drv.h
|
||||
* @id: unique id of a shared memory object on this device
|
||||
*/
|
||||
struct tee_shm {
|
||||
struct tee_device *teedev;
|
||||
struct tee_context *ctx;
|
||||
struct list_head link;
|
||||
phys_addr_t paddr;
|
||||
void *kaddr;
|
||||
size_t size;
|
||||
struct dma_buf *dmabuf;
|
||||
u32 flags;
|
||||
int id;
|
||||
};
|
||||
|
||||
struct tee_shm_pool_mgr;
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool_mgr_ops - shared memory pool manager operations
|
||||
* @alloc: called when allocating shared memory
|
||||
* @free: called when freeing shared memory
|
||||
*/
|
||||
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);
|
||||
};
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool_mgr - shared memory manager
|
||||
* @ops: operations
|
||||
* @private_data: private data for the shared memory manager
|
||||
*/
|
||||
struct tee_shm_pool_mgr {
|
||||
const struct tee_shm_pool_mgr_ops *ops;
|
||||
void *private_data;
|
||||
};
|
||||
|
||||
/**
|
||||
* 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
|
||||
* @destroy: called when destroying the pool
|
||||
* @private_data: private data for the pool
|
||||
*/
|
||||
struct tee_shm_pool {
|
||||
struct tee_shm_pool_mgr private_mgr;
|
||||
struct tee_shm_pool_mgr dma_buf_mgr;
|
||||
void (*destroy)(struct tee_shm_pool *pool);
|
||||
void *private_data;
|
||||
struct tee_shm_pool_mgr *private_mgr;
|
||||
struct tee_shm_pool_mgr *dma_buf_mgr;
|
||||
};
|
||||
|
||||
#define TEE_DEVICE_FLAG_REGISTERED 0x1
|
||||
|
|
|
@ -32,9 +32,9 @@ static void tee_shm_release(struct tee_shm *shm)
|
|||
mutex_unlock(&teedev->mutex);
|
||||
|
||||
if (shm->flags & TEE_SHM_DMA_BUF)
|
||||
poolm = &teedev->pool->dma_buf_mgr;
|
||||
poolm = teedev->pool->dma_buf_mgr;
|
||||
else
|
||||
poolm = &teedev->pool->private_mgr;
|
||||
poolm = teedev->pool->private_mgr;
|
||||
|
||||
poolm->ops->free(poolm, shm);
|
||||
kfree(shm);
|
||||
|
@ -139,9 +139,9 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
|
|||
shm->teedev = teedev;
|
||||
shm->ctx = ctx;
|
||||
if (flags & TEE_SHM_DMA_BUF)
|
||||
poolm = &teedev->pool->dma_buf_mgr;
|
||||
poolm = teedev->pool->dma_buf_mgr;
|
||||
else
|
||||
poolm = &teedev->pool->private_mgr;
|
||||
poolm = teedev->pool->private_mgr;
|
||||
|
||||
rc = poolm->ops->alloc(poolm, shm, size);
|
||||
if (rc) {
|
||||
|
|
|
@ -44,49 +44,18 @@ static void pool_op_gen_free(struct tee_shm_pool_mgr *poolm,
|
|||
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,
|
||||
};
|
||||
|
||||
static void pool_res_mem_destroy(struct tee_shm_pool *pool)
|
||||
{
|
||||
gen_pool_destroy(pool->private_mgr.private_data);
|
||||
gen_pool_destroy(pool->dma_buf_mgr.private_data);
|
||||
}
|
||||
|
||||
static int pool_res_mem_mgr_init(struct tee_shm_pool_mgr *mgr,
|
||||
struct tee_shm_pool_mem_info *info,
|
||||
int min_alloc_order)
|
||||
{
|
||||
size_t page_mask = PAGE_SIZE - 1;
|
||||
struct gen_pool *genpool = NULL;
|
||||
int rc;
|
||||
|
||||
/*
|
||||
* Start and end must be page aligned
|
||||
*/
|
||||
if ((info->vaddr & page_mask) || (info->paddr & page_mask) ||
|
||||
(info->size & page_mask))
|
||||
return -EINVAL;
|
||||
|
||||
genpool = gen_pool_create(min_alloc_order, -1);
|
||||
if (!genpool)
|
||||
return -ENOMEM;
|
||||
|
||||
gen_pool_set_algo(genpool, gen_pool_best_fit, NULL);
|
||||
rc = gen_pool_add_virt(genpool, info->vaddr, info->paddr, info->size,
|
||||
-1);
|
||||
if (rc) {
|
||||
gen_pool_destroy(genpool);
|
||||
return rc;
|
||||
}
|
||||
|
||||
mgr->private_data = genpool;
|
||||
mgr->ops = &pool_ops_generic;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* tee_shm_pool_alloc_res_mem() - Create a shared memory pool from reserved
|
||||
* memory range
|
||||
|
@ -104,43 +73,110 @@ 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 *pool = NULL;
|
||||
int ret;
|
||||
|
||||
pool = kzalloc(sizeof(*pool), GFP_KERNEL);
|
||||
if (!pool) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
struct tee_shm_pool_mgr *priv_mgr;
|
||||
struct tee_shm_pool_mgr *dmabuf_mgr;
|
||||
void *rc;
|
||||
|
||||
/*
|
||||
* Create the pool for driver private shared memory
|
||||
*/
|
||||
ret = pool_res_mem_mgr_init(&pool->private_mgr, priv_info,
|
||||
3 /* 8 byte aligned */);
|
||||
if (ret)
|
||||
goto err;
|
||||
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
|
||||
*/
|
||||
ret = pool_res_mem_mgr_init(&pool->dma_buf_mgr, dmabuf_info,
|
||||
PAGE_SHIFT);
|
||||
if (ret)
|
||||
goto err;
|
||||
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;
|
||||
|
||||
pool->destroy = pool_res_mem_destroy;
|
||||
return pool;
|
||||
err:
|
||||
if (ret == -ENOMEM)
|
||||
pr_err("%s: can't allocate memory for res_mem shared memory pool\n", __func__);
|
||||
if (pool && pool->private_mgr.private_data)
|
||||
gen_pool_destroy(pool->private_mgr.private_data);
|
||||
kfree(pool);
|
||||
return ERR_PTR(ret);
|
||||
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
|
||||
|
@ -150,7 +186,10 @@ EXPORT_SYMBOL_GPL(tee_shm_pool_alloc_res_mem);
|
|||
*/
|
||||
void tee_shm_pool_free(struct tee_shm_pool *pool)
|
||||
{
|
||||
pool->destroy(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);
|
||||
|
|
|
@ -149,6 +149,97 @@ int tee_device_register(struct tee_device *teedev);
|
|||
*/
|
||||
void tee_device_unregister(struct tee_device *teedev);
|
||||
|
||||
/**
|
||||
* struct tee_shm - shared memory object
|
||||
* @teedev: device used to allocate the object
|
||||
* @ctx: context using the object, if NULL the context is gone
|
||||
* @link link element
|
||||
* @paddr: physical address of the shared memory
|
||||
* @kaddr: virtual address of the shared memory
|
||||
* @size: size of shared memory
|
||||
* @offset: offset of buffer in user space
|
||||
* @pages: locked pages from userspace
|
||||
* @num_pages: number of locked pages
|
||||
* @dmabuf: dmabuf used to for exporting to user space
|
||||
* @flags: defined by TEE_SHM_* in tee_drv.h
|
||||
* @id: unique id of a shared memory object on this device
|
||||
*
|
||||
* This pool is only supposed to be accessed directly from the TEE
|
||||
* subsystem and from drivers that implements their own shm pool manager.
|
||||
*/
|
||||
struct tee_shm {
|
||||
struct tee_device *teedev;
|
||||
struct tee_context *ctx;
|
||||
struct list_head link;
|
||||
phys_addr_t paddr;
|
||||
void *kaddr;
|
||||
size_t size;
|
||||
unsigned int offset;
|
||||
struct page **pages;
|
||||
size_t num_pages;
|
||||
struct dma_buf *dmabuf;
|
||||
u32 flags;
|
||||
int id;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool_mgr - shared memory manager
|
||||
* @ops: operations
|
||||
* @private_data: private data for the shared memory manager
|
||||
*/
|
||||
struct tee_shm_pool_mgr {
|
||||
const struct tee_shm_pool_mgr_ops *ops;
|
||||
void *private_data;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool_mgr_ops - shared memory pool manager operations
|
||||
* @alloc: called when allocating shared memory
|
||||
* @free: called when freeing shared memory
|
||||
* @destroy_poolmgr: called when destroying the pool manager
|
||||
*/
|
||||
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);
|
||||
};
|
||||
|
||||
/**
|
||||
* 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
|
||||
* @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
|
||||
*/
|
||||
static inline void tee_shm_pool_mgr_destroy(struct tee_shm_pool_mgr *poolm)
|
||||
{
|
||||
poolm->ops->destroy_poolmgr(poolm);
|
||||
}
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool_mem_info - holds information needed to create a shared
|
||||
* memory pool
|
||||
|
|
Loading…
Reference in a new issue