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Message-Id: <20220125162938.838382-13-jens.wiklander@linaro.org>
Date: Tue, 25 Jan 2022 17:29:38 +0100
From: Jens Wiklander <jens.wiklander@...aro.org>
To: linux-kernel@...r.kernel.org, op-tee@...ts.trustedfirmware.org
Cc: Sumit Garg <sumit.garg@...aro.org>,
Herbert Xu <herbert@...dor.apana.org.au>,
Devaraj Rangasamy <Devaraj.Rangasamy@....com>,
Rijo Thomas <Rijo-john.Thomas@....com>,
David Howells <dhowells@...hat.com>,
Tyler Hicks <tyhicks@...ux.microsoft.com>,
Jens Wiklander <jens.wiklander@...aro.org>
Subject: [PATCH v3 12/12] tee: refactor TEE_SHM_* flags
Removes the redundant TEE_SHM_DMA_BUF, TEE_SHM_EXT_DMA_BUF,
TEE_SHM_MAPPED and TEE_SHM_KERNEL_MAPPED flags.
Assigns new values to the remaining flags to void gaps.
Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
---
drivers/tee/optee/smc_abi.c | 4 ++--
drivers/tee/tee_shm.c | 23 +++++++++++------------
drivers/tee/tee_shm_pool.c | 2 +-
include/linux/tee_drv.h | 21 +++++++++------------
4 files changed, 23 insertions(+), 27 deletions(-)
diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c
index 9c1c9cfb7488..0895c5146dfa 100644
--- a/drivers/tee/optee/smc_abi.c
+++ b/drivers/tee/optee/smc_abi.c
@@ -228,7 +228,7 @@ static int optee_to_msg_param(struct optee *optee,
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
- if (tee_shm_is_registered(p->u.memref.shm))
+ if (tee_shm_is_dynamic(p->u.memref.shm))
rc = to_msg_param_reg_mem(mp, p);
else
rc = to_msg_param_tmp_mem(mp, p);
@@ -669,7 +669,7 @@ static void handle_rpc_func_cmd_shm_alloc(struct tee_context *ctx,
sz = tee_shm_get_size(shm);
- if (tee_shm_is_registered(shm)) {
+ if (tee_shm_is_dynamic(shm)) {
struct page **pages;
u64 *pages_list;
size_t page_num;
diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
index c3a29022ec72..d9deb1f50022 100644
--- a/drivers/tee/tee_shm.c
+++ b/drivers/tee/tee_shm.c
@@ -58,7 +58,7 @@ static void tee_shm_release(struct tee_device *teedev, struct tee_shm *shm)
{
if (shm->flags & TEE_SHM_POOL) {
teedev->pool->ops->free(teedev->pool, shm);
- } else if (shm->flags & TEE_SHM_REGISTER) {
+ } else if (shm->flags & TEE_SHM_DYNAMIC) {
int rc = teedev->desc->ops->shm_unregister(shm->ctx, shm);
if (rc)
@@ -139,8 +139,7 @@ static struct tee_shm *shm_alloc_helper(struct tee_context *ctx, size_t size,
*/
struct tee_shm *tee_shm_alloc_user_buf(struct tee_context *ctx, size_t size)
{
- u32 flags = TEE_SHM_MAPPED | TEE_SHM_DMA_BUF | TEE_SHM_REGISTER |
- TEE_SHM_POOL;
+ u32 flags = TEE_SHM_DYNAMIC | TEE_SHM_POOL;
struct tee_device *teedev = ctx->teedev;
struct tee_shm *shm;
void *ret;
@@ -185,7 +184,7 @@ struct tee_shm *tee_shm_alloc_user_buf(struct tee_context *ctx, size_t size)
*/
struct tee_shm *tee_shm_alloc_kernel_buf(struct tee_context *ctx, size_t size)
{
- u32 flags = TEE_SHM_MAPPED | TEE_SHM_REGISTER | TEE_SHM_POOL;
+ u32 flags = TEE_SHM_DYNAMIC | TEE_SHM_POOL;
return shm_alloc_helper(ctx, size, PAGE_SIZE, flags, -1);
}
@@ -209,7 +208,7 @@ EXPORT_SYMBOL_GPL(tee_shm_alloc_kernel_buf);
*/
struct tee_shm *tee_shm_alloc_priv_buf(struct tee_context *ctx, size_t size)
{
- u32 flags = TEE_SHM_MAPPED | TEE_SHM_PRIV | TEE_SHM_POOL;
+ u32 flags = TEE_SHM_PRIV | TEE_SHM_POOL;
return shm_alloc_helper(ctx, size, sizeof(long) * 2, flags, -1);
}
@@ -306,7 +305,7 @@ register_shm_helper(struct tee_context *ctx, unsigned long addr,
struct tee_shm *tee_shm_register_user_buf(struct tee_context *ctx,
unsigned long addr, size_t length)
{
- u32 flags = TEE_SHM_DMA_BUF | TEE_SHM_USER_MAPPED | TEE_SHM_REGISTER;
+ u32 flags = TEE_SHM_USER_MAPPED | TEE_SHM_DYNAMIC;
struct tee_device *teedev = ctx->teedev;
struct tee_shm *shm;
void *ret;
@@ -350,7 +349,7 @@ struct tee_shm *tee_shm_register_user_buf(struct tee_context *ctx,
struct tee_shm *tee_shm_register_kernel_buf(struct tee_context *ctx,
void *addr, size_t length)
{
- u32 flags = TEE_SHM_REGISTER | TEE_SHM_KERNEL_MAPPED;
+ u32 flags = TEE_SHM_DYNAMIC;
return register_shm_helper(ctx, (unsigned long)addr, length, flags, -1);
}
@@ -394,7 +393,7 @@ int tee_shm_get_fd(struct tee_shm *shm)
{
int fd;
- if (!(shm->flags & TEE_SHM_DMA_BUF))
+ if (shm->id < 0)
return -EINVAL;
/* matched by tee_shm_put() in tee_shm_op_release() */
@@ -424,7 +423,7 @@ EXPORT_SYMBOL_GPL(tee_shm_free);
*/
int tee_shm_va2pa(struct tee_shm *shm, void *va, phys_addr_t *pa)
{
- if (!(shm->flags & TEE_SHM_MAPPED))
+ if (!shm->kaddr)
return -EINVAL;
/* Check that we're in the range of the shm */
if ((char *)va < (char *)shm->kaddr)
@@ -446,7 +445,7 @@ EXPORT_SYMBOL_GPL(tee_shm_va2pa);
*/
int tee_shm_pa2va(struct tee_shm *shm, phys_addr_t pa, void **va)
{
- if (!(shm->flags & TEE_SHM_MAPPED))
+ if (!shm->kaddr)
return -EINVAL;
/* Check that we're in the range of the shm */
if (pa < shm->paddr)
@@ -474,7 +473,7 @@ EXPORT_SYMBOL_GPL(tee_shm_pa2va);
*/
void *tee_shm_get_va(struct tee_shm *shm, size_t offs)
{
- if (!(shm->flags & TEE_SHM_MAPPED))
+ if (!shm->kaddr)
return ERR_PTR(-EINVAL);
if (offs >= shm->size)
return ERR_PTR(-EINVAL);
@@ -549,7 +548,7 @@ void tee_shm_put(struct tee_shm *shm)
* the refcount_inc() in tee_shm_get_from_id() never starts
* from 0.
*/
- if (shm->flags & TEE_SHM_DMA_BUF)
+ if (shm->id >= 0)
idr_remove(&teedev->idr, shm->id);
do_release = true;
}
diff --git a/drivers/tee/tee_shm_pool.c b/drivers/tee/tee_shm_pool.c
index 71e0f8ae69aa..058bfbac657a 100644
--- a/drivers/tee/tee_shm_pool.c
+++ b/drivers/tee/tee_shm_pool.c
@@ -30,7 +30,7 @@ static int pool_op_gen_alloc(struct tee_shm_pool *pool, struct tee_shm *shm,
* 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;
+ shm->flags &= ~TEE_SHM_DYNAMIC;
return 0;
}
diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
index a3b663ef0694..911cad324acc 100644
--- a/include/linux/tee_drv.h
+++ b/include/linux/tee_drv.h
@@ -20,14 +20,11 @@
* specific TEE driver.
*/
-#define TEE_SHM_MAPPED BIT(0) /* Memory mapped by the kernel */
-#define TEE_SHM_DMA_BUF BIT(1) /* Memory with dma-buf handle */
-#define TEE_SHM_EXT_DMA_BUF BIT(2) /* Memory with dma-buf handle */
-#define TEE_SHM_REGISTER BIT(3) /* Memory registered in secure world */
-#define TEE_SHM_USER_MAPPED BIT(4) /* Memory mapped in user space */
-#define TEE_SHM_POOL BIT(5) /* Memory allocated from pool */
-#define TEE_SHM_KERNEL_MAPPED BIT(6) /* Memory mapped in kernel space */
-#define TEE_SHM_PRIV BIT(7) /* Memory private to TEE driver */
+#define TEE_SHM_DYNAMIC BIT(0) /* Dynamic shared memory registered */
+ /* in secure world */
+#define TEE_SHM_USER_MAPPED BIT(1) /* Memory mapped in user space */
+#define TEE_SHM_POOL BIT(2) /* Memory allocated from pool */
+#define TEE_SHM_PRIV BIT(3) /* Memory private to TEE driver */
struct device;
struct tee_device;
@@ -280,13 +277,13 @@ struct tee_shm *tee_shm_register_kernel_buf(struct tee_context *ctx,
void *addr, size_t length);
/**
- * tee_shm_is_registered() - Check if shared memory object in registered in TEE
+ * tee_shm_is_dynamic() - Check if shared memory object is of the dynamic kind
* @shm: Shared memory handle
- * @returns true if object is registered in TEE
+ * @returns true if object is dynamic shared memory
*/
-static inline bool tee_shm_is_registered(struct tee_shm *shm)
+static inline bool tee_shm_is_dynamic(struct tee_shm *shm)
{
- return shm && (shm->flags & TEE_SHM_REGISTER);
+ return shm && (shm->flags & TEE_SHM_DYNAMIC);
}
/**
--
2.31.1
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