From a249dd200d03791cab23e47571f3e13d9c72af6c Mon Sep 17 00:00:00 2001 From: Sumit Garg Date: Fri, 8 Nov 2019 16:57:14 +0530 Subject: tee: optee: Fix dynamic shm pool allocations In case of dynamic shared memory pool, kernel memory allocated using dmabuf_mgr pool needs to be registered with OP-TEE prior to its usage during optee_open_session() or optee_invoke_func(). So fix dmabuf_mgr pool allocations via an additional call to optee_shm_register(). Also, allow kernel pages to be registered as shared memory with OP-TEE. Fixes: 9733b072a12a ("optee: allow to work without static shared memory") Signed-off-by: Sumit Garg Signed-off-by: Jens Wiklander --- drivers/tee/optee/shm_pool.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'drivers/tee/optee/shm_pool.c') diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c index de1d9b8fad90..0332a5301d61 100644 --- a/drivers/tee/optee/shm_pool.c +++ b/drivers/tee/optee/shm_pool.c @@ -17,6 +17,7 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm, { unsigned int order = get_order(size); struct page *page; + int rc = 0; page = alloc_pages(GFP_KERNEL | __GFP_ZERO, order); if (!page) @@ -26,12 +27,21 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm, shm->paddr = page_to_phys(page); shm->size = PAGE_SIZE << order; - return 0; + if (shm->flags & TEE_SHM_DMA_BUF) { + shm->flags |= TEE_SHM_REGISTER; + rc = optee_shm_register(shm->ctx, shm, &page, 1 << order, + (unsigned long)shm->kaddr); + } + + return rc; } static void pool_op_free(struct tee_shm_pool_mgr *poolm, struct tee_shm *shm) { + if (shm->flags & TEE_SHM_DMA_BUF) + optee_shm_unregister(shm->ctx, shm); + free_pages((unsigned long)shm->kaddr, get_order(shm->size)); shm->kaddr = NULL; } -- cgit v1.2.3-59-g8ed1b