diff options
Diffstat (limited to 'drivers/tee')
| -rw-r--r-- | drivers/tee/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/tee/Makefile | 1 | ||||
| -rw-r--r-- | drivers/tee/amdtee/amdtee_private.h | 2 | ||||
| -rw-r--r-- | drivers/tee/amdtee/call.c | 2 | ||||
| -rw-r--r-- | drivers/tee/amdtee/core.c | 3 | ||||
| -rw-r--r-- | drivers/tee/amdtee/shm_pool.c | 2 | ||||
| -rw-r--r-- | drivers/tee/optee/call.c | 2 | ||||
| -rw-r--r-- | drivers/tee/optee/core.c | 66 | ||||
| -rw-r--r-- | drivers/tee/optee/device.c | 2 | ||||
| -rw-r--r-- | drivers/tee/optee/ffa_abi.c | 8 | ||||
| -rw-r--r-- | drivers/tee/optee/notif.c | 2 | ||||
| -rw-r--r-- | drivers/tee/optee/optee_private.h | 14 | ||||
| -rw-r--r-- | drivers/tee/optee/rpc.c | 2 | ||||
| -rw-r--r-- | drivers/tee/optee/smc_abi.c | 17 | ||||
| -rw-r--r-- | drivers/tee/tee_core.c | 2 | ||||
| -rw-r--r-- | drivers/tee/tee_private.h | 35 | ||||
| -rw-r--r-- | drivers/tee/tee_shm.c | 67 | ||||
| -rw-r--r-- | drivers/tee/tee_shm_pool.c | 2 | ||||
| -rw-r--r-- | drivers/tee/tstee/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/tee/tstee/Makefile | 3 | ||||
| -rw-r--r-- | drivers/tee/tstee/core.c | 480 | ||||
| -rw-r--r-- | drivers/tee/tstee/tstee_private.h | 92 |
22 files changed, 677 insertions, 139 deletions
diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig index 73a147202e..61b507c187 100644 --- a/drivers/tee/Kconfig +++ b/drivers/tee/Kconfig @@ -15,5 +15,6 @@ if TEE source "drivers/tee/optee/Kconfig" source "drivers/tee/amdtee/Kconfig" +source "drivers/tee/tstee/Kconfig" endif diff --git a/drivers/tee/Makefile b/drivers/tee/Makefile index 68da044afb..5488cba30b 100644 --- a/drivers/tee/Makefile +++ b/drivers/tee/Makefile @@ -5,3 +5,4 @@ tee-objs += tee_shm.o tee-objs += tee_shm_pool.o obj-$(CONFIG_OPTEE) += optee/ obj-$(CONFIG_AMDTEE) += amdtee/ +obj-$(CONFIG_ARM_TSTEE) += tstee/ diff --git a/drivers/tee/amdtee/amdtee_private.h b/drivers/tee/amdtee/amdtee_private.h index 6d0f7062bb..d870500338 100644 --- a/drivers/tee/amdtee/amdtee_private.h +++ b/drivers/tee/amdtee/amdtee_private.h @@ -9,7 +9,7 @@ #include <linux/mutex.h> #include <linux/spinlock.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/kref.h> #include <linux/types.h> #include "amdtee_if.h" diff --git a/drivers/tee/amdtee/call.c b/drivers/tee/amdtee/call.c index e9b63dcb31..4c21b02be4 100644 --- a/drivers/tee/amdtee/call.c +++ b/drivers/tee/amdtee/call.c @@ -5,7 +5,7 @@ #include <linux/device.h> #include <linux/tee.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/psp-tee.h> #include <linux/slab.h> #include <linux/psp.h> diff --git a/drivers/tee/amdtee/core.c b/drivers/tee/amdtee/core.c index 3c15f6a9e9..e487231d25 100644 --- a/drivers/tee/amdtee/core.c +++ b/drivers/tee/amdtee/core.c @@ -9,13 +9,12 @@ #include <linux/slab.h> #include <linux/string.h> #include <linux/device.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/types.h> #include <linux/mm.h> #include <linux/uaccess.h> #include <linux/firmware.h> #include "amdtee_private.h" -#include "../tee_private.h" #include <linux/psp-tee.h> static struct amdtee_driver_data *drv_data; diff --git a/drivers/tee/amdtee/shm_pool.c b/drivers/tee/amdtee/shm_pool.c index f0303126f1..6346e0bc8a 100644 --- a/drivers/tee/amdtee/shm_pool.c +++ b/drivers/tee/amdtee/shm_pool.c @@ -4,7 +4,7 @@ */ #include <linux/slab.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/psp.h> #include "amdtee_private.h" diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index a91e50be11..16eb953e14 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -7,7 +7,7 @@ #include <linux/errno.h> #include <linux/mm.h> #include <linux/slab.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/types.h> #include "optee_private.h" diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index 3aed554bc8..39e688d4e9 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -9,77 +9,13 @@ #include <linux/crash_dump.h> #include <linux/errno.h> #include <linux/io.h> -#include <linux/mm.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/string.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/types.h> #include "optee_private.h" -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, - size_t num_pages, - unsigned long start)) -{ - size_t nr_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE; - struct page **pages; - unsigned int i; - int rc = 0; - - /* - * Ignore alignment since this is already going to be page aligned - * and there's no need for any larger alignment. - */ - shm->kaddr = alloc_pages_exact(nr_pages * PAGE_SIZE, - GFP_KERNEL | __GFP_ZERO); - if (!shm->kaddr) - return -ENOMEM; - - shm->paddr = virt_to_phys(shm->kaddr); - shm->size = nr_pages * PAGE_SIZE; - - pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL); - if (!pages) { - rc = -ENOMEM; - goto err; - } - - for (i = 0; i < nr_pages; i++) - pages[i] = virt_to_page((u8 *)shm->kaddr + i * PAGE_SIZE); - - shm->pages = pages; - shm->num_pages = nr_pages; - - if (shm_register) { - rc = shm_register(shm->ctx, shm, pages, nr_pages, - (unsigned long)shm->kaddr); - if (rc) - goto err; - } - - return 0; -err: - free_pages_exact(shm->kaddr, shm->size); - shm->kaddr = NULL; - return rc; -} - -void optee_pool_op_free_helper(struct tee_shm_pool *pool, struct tee_shm *shm, - int (*shm_unregister)(struct tee_context *ctx, - struct tee_shm *shm)) -{ - if (shm_unregister) - shm_unregister(shm->ctx, shm); - free_pages_exact(shm->kaddr, shm->size); - shm->kaddr = NULL; - kfree(shm->pages); - shm->pages = NULL; -} - static void optee_bus_scan(struct work_struct *work) { WARN_ON(optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP)); diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c index 1892e49a8e..d296c70ddf 100644 --- a/drivers/tee/optee/device.c +++ b/drivers/tee/optee/device.c @@ -7,7 +7,7 @@ #include <linux/kernel.h> #include <linux/slab.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/uuid.h> #include "optee_private.h" diff --git a/drivers/tee/optee/ffa_abi.c b/drivers/tee/optee/ffa_abi.c index c5a3e25c55..3e73efa51b 100644 --- a/drivers/tee/optee/ffa_abi.c +++ b/drivers/tee/optee/ffa_abi.c @@ -11,7 +11,7 @@ #include <linux/sched.h> #include <linux/slab.h> #include <linux/string.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/types.h> #include "optee_private.h" #include "optee_ffa.h" @@ -374,14 +374,14 @@ static int optee_ffa_shm_unregister_supp(struct tee_context *ctx, 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(pool, shm, size, align, - optee_ffa_shm_register); + return tee_dyn_shm_alloc_helper(shm, size, align, + optee_ffa_shm_register); } static void pool_ffa_op_free(struct tee_shm_pool *pool, struct tee_shm *shm) { - optee_pool_op_free_helper(pool, shm, optee_ffa_shm_unregister); + tee_dyn_shm_free_helper(shm, optee_ffa_shm_unregister); } static void pool_ffa_op_destroy_pool(struct tee_shm_pool *pool) diff --git a/drivers/tee/optee/notif.c b/drivers/tee/optee/notif.c index 05212842b0..0d7878e770 100644 --- a/drivers/tee/optee/notif.c +++ b/drivers/tee/optee/notif.c @@ -9,7 +9,7 @@ #include <linux/errno.h> #include <linux/slab.h> #include <linux/spinlock.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include "optee_private.h" struct notif_entry { diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index 7a5243c78b..429cc20be5 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -9,7 +9,7 @@ #include <linux/arm-smccc.h> #include <linux/rhashtable.h> #include <linux/semaphore.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/types.h> #include "optee_msg.h" @@ -283,18 +283,6 @@ int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session); int optee_enumerate_devices(u32 func); void optee_unregister_devices(void); -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, - size_t num_pages, - unsigned long start)); -void optee_pool_op_free_helper(struct tee_shm_pool *pool, struct tee_shm *shm, - int (*shm_unregister)(struct tee_context *ctx, - struct tee_shm *shm)); - - void optee_remove_common(struct optee *optee); int optee_open(struct tee_context *ctx, bool cap_memref_null); void optee_release(struct tee_context *ctx); diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c index e69bc63806..f086812f11 100644 --- a/drivers/tee/optee/rpc.c +++ b/drivers/tee/optee/rpc.c @@ -8,7 +8,7 @@ #include <linux/delay.h> #include <linux/i2c.h> #include <linux/slab.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include "optee_private.h" #include "optee_rpc_cmd.h" diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c index a37f87087e..844285d4f0 100644 --- a/drivers/tee/optee/smc_abi.c +++ b/drivers/tee/optee/smc_abi.c @@ -23,7 +23,7 @@ #include <linux/sched.h> #include <linux/slab.h> #include <linux/string.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/types.h> #include <linux/workqueue.h> #include "optee_private.h" @@ -592,19 +592,18 @@ static int pool_op_alloc(struct tee_shm_pool *pool, * to be registered with OP-TEE. */ if (shm->flags & TEE_SHM_PRIV) - return optee_pool_op_alloc_helper(pool, shm, size, align, NULL); + return tee_dyn_shm_alloc_helper(shm, size, align, NULL); - return optee_pool_op_alloc_helper(pool, shm, size, align, - optee_shm_register); + return tee_dyn_shm_alloc_helper(shm, size, align, optee_shm_register); } static void pool_op_free(struct tee_shm_pool *pool, struct tee_shm *shm) { if (!(shm->flags & TEE_SHM_PRIV)) - optee_pool_op_free_helper(pool, shm, optee_shm_unregister); + tee_dyn_shm_free_helper(shm, optee_shm_unregister); else - optee_pool_op_free_helper(pool, shm, NULL); + tee_dyn_shm_free_helper(shm, NULL); } static void pool_op_destroy_pool(struct tee_shm_pool *pool) @@ -1433,7 +1432,7 @@ static optee_invoke_fn *get_invoke_func(struct device *dev) * optee_remove is called by platform subsystem to alert the driver * that it should release the device */ -static int optee_smc_remove(struct platform_device *pdev) +static void optee_smc_remove(struct platform_device *pdev) { struct optee *optee = platform_get_drvdata(pdev); @@ -1453,8 +1452,6 @@ static int optee_smc_remove(struct platform_device *pdev) memunmap(optee->smc.memremaped_shm); kfree(optee); - - return 0; } /* optee_shutdown - Device Removal Routine @@ -1806,7 +1803,7 @@ MODULE_DEVICE_TABLE(of, optee_dt_match); static struct platform_driver optee_driver = { .probe = optee_probe, - .remove = optee_smc_remove, + .remove_new = optee_smc_remove, .shutdown = optee_shutdown, .driver = { .name = "optee", diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index e59c20d74b..82ad095d2b 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -11,7 +11,7 @@ #include <linux/idr.h> #include <linux/module.h> #include <linux/slab.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/uaccess.h> #include <crypto/hash.h> #include <crypto/sha1.h> diff --git a/drivers/tee/tee_private.h b/drivers/tee/tee_private.h index 754e11dcb2..9bc5060522 100644 --- a/drivers/tee/tee_private.h +++ b/drivers/tee/tee_private.h @@ -12,41 +12,6 @@ #include <linux/mutex.h> #include <linux/types.h> -#define TEE_DEVICE_FLAG_REGISTERED 0x1 -#define TEE_MAX_DEV_NAME_LEN 32 - -/** - * struct tee_device - TEE Device representation - * @name: name of device - * @desc: description of device - * @id: unique id of device - * @flags: represented by TEE_DEVICE_FLAG_REGISTERED above - * @dev: embedded basic device structure - * @cdev: embedded cdev - * @num_users: number of active users of this device - * @c_no_user: completion used when unregistering the device - * @mutex: mutex protecting @num_users and @idr - * @idr: register of user space shared memory objects allocated or - * registered on this device - * @pool: shared memory pool - */ -struct tee_device { - char name[TEE_MAX_DEV_NAME_LEN]; - const struct tee_desc *desc; - int id; - unsigned int flags; - - struct device dev; - struct cdev cdev; - - size_t num_users; - struct completion c_no_users; - struct mutex mutex; /* protects num_users and idr */ - - struct idr idr; - struct tee_shm_pool *pool; -}; - int tee_shm_get_fd(struct tee_shm *shm); bool tee_device_get(struct tee_device *teedev); diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 731d9028b6..daf6e5cfd5 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -5,10 +5,11 @@ #include <linux/anon_inodes.h> #include <linux/device.h> #include <linux/idr.h> +#include <linux/io.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/slab.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include <linux/uaccess.h> #include <linux/uio.h> #include <linux/highmem.h> @@ -202,6 +203,70 @@ struct tee_shm *tee_shm_alloc_priv_buf(struct tee_context *ctx, size_t size) } EXPORT_SYMBOL_GPL(tee_shm_alloc_priv_buf); +int tee_dyn_shm_alloc_helper(struct tee_shm *shm, size_t size, size_t align, + int (*shm_register)(struct tee_context *ctx, + struct tee_shm *shm, + struct page **pages, + size_t num_pages, + unsigned long start)) +{ + size_t nr_pages = roundup(size, PAGE_SIZE) / PAGE_SIZE; + struct page **pages; + unsigned int i; + int rc = 0; + + /* + * Ignore alignment since this is already going to be page aligned + * and there's no need for any larger alignment. + */ + shm->kaddr = alloc_pages_exact(nr_pages * PAGE_SIZE, + GFP_KERNEL | __GFP_ZERO); + if (!shm->kaddr) + return -ENOMEM; + + shm->paddr = virt_to_phys(shm->kaddr); + shm->size = nr_pages * PAGE_SIZE; + + pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL); + if (!pages) { + rc = -ENOMEM; + goto err; + } + + for (i = 0; i < nr_pages; i++) + pages[i] = virt_to_page((u8 *)shm->kaddr + i * PAGE_SIZE); + + shm->pages = pages; + shm->num_pages = nr_pages; + + if (shm_register) { + rc = shm_register(shm->ctx, shm, pages, nr_pages, + (unsigned long)shm->kaddr); + if (rc) + goto err; + } + + return 0; +err: + free_pages_exact(shm->kaddr, shm->size); + shm->kaddr = NULL; + return rc; +} +EXPORT_SYMBOL_GPL(tee_dyn_shm_alloc_helper); + +void tee_dyn_shm_free_helper(struct tee_shm *shm, + int (*shm_unregister)(struct tee_context *ctx, + struct tee_shm *shm)) +{ + if (shm_unregister) + shm_unregister(shm->ctx, shm); + free_pages_exact(shm->kaddr, shm->size); + shm->kaddr = NULL; + kfree(shm->pages); + shm->pages = NULL; +} +EXPORT_SYMBOL_GPL(tee_dyn_shm_free_helper); + static struct tee_shm * register_shm_helper(struct tee_context *ctx, struct iov_iter *iter, u32 flags, int id) diff --git a/drivers/tee/tee_shm_pool.c b/drivers/tee/tee_shm_pool.c index 058bfbac65..80004b5562 100644 --- a/drivers/tee/tee_shm_pool.c +++ b/drivers/tee/tee_shm_pool.c @@ -6,7 +6,7 @@ #include <linux/dma-buf.h> #include <linux/genalloc.h> #include <linux/slab.h> -#include <linux/tee_drv.h> +#include <linux/tee_core.h> #include "tee_private.h" static int pool_op_gen_alloc(struct tee_shm_pool *pool, struct tee_shm *shm, diff --git a/drivers/tee/tstee/Kconfig b/drivers/tee/tstee/Kconfig new file mode 100644 index 0000000000..d32f91d473 --- /dev/null +++ b/drivers/tee/tstee/Kconfig @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0-only +config ARM_TSTEE + tristate "Arm Trusted Services TEE driver" + depends on ARM_FFA_TRANSPORT + default n + help + The Trusted Services project provides a framework for developing and + deploying device Root of Trust services in FF-A Secure Partitions. + This driver provides an interface to make Trusted Services Secure + Partitions accessible for user space clients, since the FF-A driver + doesn't implement a user space interface directly. diff --git a/drivers/tee/tstee/Makefile b/drivers/tee/tstee/Makefile new file mode 100644 index 0000000000..5227020ebd --- /dev/null +++ b/drivers/tee/tstee/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0-only +arm-tstee-objs := core.o +obj-$(CONFIG_ARM_TSTEE) = arm-tstee.o diff --git a/drivers/tee/tstee/core.c b/drivers/tee/tstee/core.c new file mode 100644 index 0000000000..533425e9e9 --- /dev/null +++ b/drivers/tee/tstee/core.c @@ -0,0 +1,480 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2023, Arm Limited + */ + +#include <linux/arm_ffa.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/limits.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/scatterlist.h> +#include <linux/slab.h> +#include <linux/tee_core.h> +#include <linux/types.h> +#include <linux/uuid.h> +#include <linux/xarray.h> +#include "tstee_private.h" + +#define FFA_DIRECT_REQ_ARG_NUM 5 +#define FFA_INVALID_MEM_HANDLE U64_MAX + +static void arg_list_to_ffa_data(const u32 *args, + struct ffa_send_direct_data *data) +{ + data->data0 = args[0]; + data->data1 = args[1]; + data->data2 = args[2]; + data->data3 = args[3]; + data->data4 = args[4]; +} + +static void arg_list_from_ffa_data(const struct ffa_send_direct_data *data, + u32 *args) +{ + args[0] = lower_32_bits(data->data0); + args[1] = lower_32_bits(data->data1); + args[2] = lower_32_bits(data->data2); + args[3] = lower_32_bits(data->data3); + args[4] = lower_32_bits(data->data4); +} + +static void tstee_get_version(struct tee_device *teedev, + struct tee_ioctl_version_data *vers) +{ + struct tstee *tstee = tee_get_drvdata(teedev); + struct tee_ioctl_version_data v = { + .impl_id = TEE_IMPL_ID_TSTEE, + /* FF-A endpoint ID only uses the lower 16 bits */ + .impl_caps = lower_16_bits(tstee->ffa_dev->vm_id), + .gen_caps = 0, + }; + + *vers = v; +} + +static int tstee_open(struct tee_context *ctx) +{ + struct ts_context_data *ctxdata; + + ctxdata = kzalloc(sizeof(*ctxdata), GFP_KERNEL); + if (!ctxdata) + return -ENOMEM; + + xa_init_flags(&ctxdata->sess_list, XA_FLAGS_ALLOC); + + ctx->data = ctxdata; + + return 0; +} + +static void tstee_release(struct tee_context *ctx) +{ + struct ts_context_data *ctxdata = ctx->data; + struct ts_session *sess; + unsigned long idx; + + if (!ctxdata) + return; + + xa_for_each(&ctxdata->sess_list, idx, sess) { + xa_erase(&ctxdata->sess_list, idx); + kfree(sess); + } + + xa_destroy(&ctxdata->sess_list); + + kfree(ctxdata); + ctx->data = NULL; +} + +static int tstee_open_session(struct tee_context *ctx, + struct tee_ioctl_open_session_arg *arg, + struct tee_param *param __always_unused) +{ + struct tstee *tstee = tee_get_drvdata(ctx->teedev); + struct ffa_device *ffa_dev = tstee->ffa_dev; + struct ts_context_data *ctxdata = ctx->data; + struct ffa_send_direct_data ffa_data; + struct ts_session *sess = NULL; + u32 ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {}; + u32 sess_id; + int rc; + + ffa_args[TS_RPC_CTRL_REG] = + TS_RPC_CTRL_PACK_IFACE_OPCODE(TS_RPC_MGMT_IFACE_ID, + TS_RPC_OP_SERVICE_INFO); + + memcpy(ffa_args + TS_RPC_SERVICE_INFO_UUID0, arg->uuid, UUID_SIZE); + + arg_list_to_ffa_data(ffa_args, &ffa_data); + rc = ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data); + if (rc) + return rc; + + arg_list_from_ffa_data(&ffa_data, ffa_args); + + if (ffa_args[TS_RPC_SERVICE_INFO_RPC_STATUS] != TS_RPC_OK) + return -ENODEV; + + if (ffa_args[TS_RPC_SERVICE_INFO_IFACE] > U8_MAX) + return -EINVAL; + + sess = kzalloc(sizeof(*sess), GFP_KERNEL); + if (!sess) + return -ENOMEM; + + sess->iface_id = ffa_args[TS_RPC_SERVICE_INFO_IFACE]; + + rc = xa_alloc(&ctxdata->sess_list, &sess_id, sess, xa_limit_32b, + GFP_KERNEL); + if (rc) { + kfree(sess); + return rc; + } + + arg->session = sess_id; + arg->ret = 0; + + return 0; +} + +static int tstee_close_session(struct tee_context *ctx, u32 session) +{ + struct ts_context_data *ctxdata = ctx->data; + struct ts_session *sess; + + /* Calls xa_lock() internally */ + sess = xa_erase(&ctxdata->sess_list, session); + if (!sess) + return -EINVAL; + + kfree(sess); + + return 0; +} + +static int tstee_invoke_func(struct tee_context *ctx, + struct tee_ioctl_invoke_arg *arg, + struct tee_param *param) +{ + struct tstee *tstee = tee_get_drvdata(ctx->teedev); + struct ffa_device *ffa_dev = tstee->ffa_dev; + struct ts_context_data *ctxdata = ctx->data; + struct ffa_send_direct_data ffa_data; + struct tee_shm *shm = NULL; + struct ts_session *sess; + u32 req_len, ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {}; + int shm_id, rc; + u8 iface_id; + u64 handle; + u16 opcode; + + xa_lock(&ctxdata->sess_list); + sess = xa_load(&ctxdata->sess_list, arg->session); + + /* + * Do this while holding the lock to make sure that the session wasn't + * closed meanwhile + */ + if (sess) + iface_id = sess->iface_id; + + xa_unlock(&ctxdata->sess_list); + if (!sess) + return -EINVAL; + + opcode = lower_16_bits(arg->func); + shm_id = lower_32_bits(param[0].u.value.a); + req_len = lower_32_bits(param[0].u.value.b); + + if (shm_id != 0) { + shm = tee_shm_get_from_id(ctx, shm_id); + if (IS_ERR(shm)) + return PTR_ERR(shm); + + if (shm->size < req_len) { + dev_err(&ffa_dev->dev, + "request doesn't fit into shared memory buffer\n"); + rc = -EINVAL; + goto out; + } + + handle = shm->sec_world_id; + } else { + handle = FFA_INVALID_MEM_HANDLE; + } + + ffa_args[TS_RPC_CTRL_REG] = TS_RPC_CTRL_PACK_IFACE_OPCODE(iface_id, + opcode); + ffa_args[TS_RPC_SERVICE_MEM_HANDLE_LSW] = lower_32_bits(handle); + ffa_args[TS_RPC_SERVICE_MEM_HANDLE_MSW] = upper_32_bits(handle); + ffa_args[TS_RPC_SERVICE_REQ_LEN] = req_len; + ffa_args[TS_RPC_SERVICE_CLIENT_ID] = 0; + + arg_list_to_ffa_data(ffa_args, &ffa_data); + rc = ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data); + if (rc) + goto out; + + arg_list_from_ffa_data(&ffa_data, ffa_args); + + if (ffa_args[TS_RPC_SERVICE_RPC_STATUS] != TS_RPC_OK) { + dev_err(&ffa_dev->dev, "invoke_func rpc status: %d\n", + ffa_args[TS_RPC_SERVICE_RPC_STATUS]); + rc = -EINVAL; + goto out; + } + + arg->ret = ffa_args[TS_RPC_SERVICE_STATUS]; + if (shm && shm->size >= ffa_args[TS_RPC_SERVICE_RESP_LEN]) + param[0].u.value.a = ffa_args[TS_RPC_SERVICE_RESP_LEN]; + +out: + if (shm) + tee_shm_put(shm); + + return rc; +} + +static int tstee_shm_register(struct tee_context *ctx, struct tee_shm *shm, + struct page **pages, size_t num_pages, + unsigned long start __always_unused) +{ + struct tstee *tstee = tee_get_drvdata(ctx->teedev); + struct ffa_device *ffa_dev = tstee->ffa_dev; + struct ffa_mem_region_attributes mem_attr = { + .receiver = tstee->ffa_dev->vm_id, + .attrs = FFA_MEM_RW, + .flag = 0, + }; + struct ffa_mem_ops_args mem_args = { + .attrs = &mem_attr, + .use_txbuf = true, + .nattrs = 1, + .flags = 0, + }; + struct ffa_send_direct_data ffa_data; + struct sg_table sgt; + u32 ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {}; + int rc; + + rc = sg_alloc_table_from_pages(&sgt, pages, num_pages, 0, + num_pages * PAGE_SIZE, GFP_KERNEL); + if (rc) + return rc; + + mem_args.sg = sgt.sgl; + rc = ffa_dev->ops->mem_ops->memory_share(&mem_args); + sg_free_table(&sgt); + if (rc) + return rc; + + shm->sec_world_id = mem_args.g_handle; + + ffa_args[TS_RPC_CTRL_REG] = + TS_RPC_CTRL_PACK_IFACE_OPCODE(TS_RPC_MGMT_IFACE_ID, + TS_RPC_OP_RETRIEVE_MEM); + ffa_args[TS_RPC_RETRIEVE_MEM_HANDLE_LSW] = + lower_32_bits(shm->sec_world_id); + ffa_args[TS_RPC_RETRIEVE_MEM_HANDLE_MSW] = + upper_32_bits(shm->sec_world_id); + ffa_args[TS_RPC_RETRIEVE_MEM_TAG_LSW] = 0; + ffa_args[TS_RPC_RETRIEVE_MEM_TAG_MSW] = 0; + + arg_list_to_ffa_data(ffa_args, &ffa_data); + rc = ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data); + if (rc) { + (void)ffa_dev->ops->mem_ops->memory_reclaim(shm->sec_world_id, + 0); + return rc; + } + + arg_list_from_ffa_data(&ffa_data, ffa_args); + + if (ffa_args[TS_RPC_RETRIEVE_MEM_RPC_STATUS] != TS_RPC_OK) { + dev_err(&ffa_dev->dev, "shm_register rpc status: %d\n", + ffa_args[TS_RPC_RETRIEVE_MEM_RPC_STATUS]); + ffa_dev->ops->mem_ops->memory_reclaim(shm->sec_world_id, 0); + return -EINVAL; + } + + return 0; +} + +static int tstee_shm_unregister(struct tee_context *ctx, struct tee_shm *shm) +{ + struct tstee *tstee = tee_get_drvdata(ctx->teedev); + struct ffa_device *ffa_dev = tstee->ffa_dev; + struct ffa_send_direct_data ffa_data; + u32 ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {}; + int rc; + + ffa_args[TS_RPC_CTRL_REG] = + TS_RPC_CTRL_PACK_IFACE_OPCODE(TS_RPC_MGMT_IFACE_ID, + TS_RPC_OP_RELINQ_MEM); + ffa_args[TS_RPC_RELINQ_MEM_HANDLE_LSW] = + lower_32_bits(shm->sec_world_id); + ffa_args[TS_RPC_RELINQ_MEM_HANDLE_MSW] = + upper_32_bits(shm->sec_world_id); + + arg_list_to_ffa_data(ffa_args, &ffa_data); + rc = ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data); + if (rc) + return rc; + arg_list_from_ffa_data(&ffa_data, ffa_args); + + if (ffa_args[TS_RPC_RELINQ_MEM_RPC_STATUS] != TS_RPC_OK) { + dev_err(&ffa_dev->dev, "shm_unregister rpc status: %d\n", + ffa_args[TS_RPC_RELINQ_MEM_RPC_STATUS]); + return -EINVAL; + } + + rc = ffa_dev->ops->mem_ops->memory_reclaim(shm->sec_world_id, 0); + + return rc; +} + +static const struct tee_driver_ops tstee_ops = { + .get_version = tstee_get_version, + .open = tstee_open, + .release = tstee_release, + .open_session = tstee_open_session, + .close_session = tstee_close_session, + .invoke_func = tstee_invoke_func, +}; + +static const struct tee_desc tstee_desc = { + .name = "tstee-clnt", + .ops = &tstee_ops, + .owner = THIS_MODULE, +}; + +static int pool_op_alloc(struct tee_shm_pool *pool, struct tee_shm *shm, + size_t size, size_t align) +{ + return tee_dyn_shm_alloc_helper(shm, size, align, tstee_shm_register); +} + +static void pool_op_free(struct tee_shm_pool *pool, struct tee_shm *shm) +{ + tee_dyn_shm_free_helper(shm, tstee_shm_unregister); +} + +static void pool_op_destroy_pool(struct tee_shm_pool *pool) +{ + kfree(pool); +} + +static const struct tee_shm_pool_ops pool_ops = { + .alloc = pool_op_alloc, + .free = pool_op_free, + .destroy_pool = pool_op_destroy_pool, +}; + +static struct tee_shm_pool *tstee_create_shm_pool(void) +{ + struct tee_shm_pool *pool = kzalloc(sizeof(*pool), GFP_KERNEL); + + if (!pool) + return ERR_PTR(-ENOMEM); + + pool->ops = &pool_ops; + + return pool; +} + +static bool tstee_check_rpc_compatible(struct ffa_device *ffa_dev) +{ + struct ffa_send_direct_data ffa_data; + u32 ffa_args[FFA_DIRECT_REQ_ARG_NUM] = {}; + + ffa_args[TS_RPC_CTRL_REG] = + TS_RPC_CTRL_PACK_IFACE_OPCODE(TS_RPC_MGMT_IFACE_ID, + TS_RPC_OP_GET_VERSION); + + arg_list_to_ffa_data(ffa_args, &ffa_data); + if (ffa_dev->ops->msg_ops->sync_send_receive(ffa_dev, &ffa_data)) + return false; + + arg_list_from_ffa_data(&ffa_data, ffa_args); + + return ffa_args[TS_RPC_GET_VERSION_RESP] == TS_RPC_PROTOCOL_VERSION; +} + +static int tstee_probe(struct ffa_device *ffa_dev) +{ + struct tstee *tstee; + int rc; + + ffa_dev->ops->msg_ops->mode_32bit_set(ffa_dev); + + if (!tstee_check_rpc_compatible(ffa_dev)) + return -EINVAL; + + tstee = kzalloc(sizeof(*tstee), GFP_KERNEL); + if (!tstee) + return -ENOMEM; + + tstee->ffa_dev = ffa_dev; + + tstee->pool = tstee_create_shm_pool(); + if (IS_ERR(tstee->pool)) { + rc = PTR_ERR(tstee->pool); + tstee->pool = NULL; + goto err_free_tstee; + } + + tstee->teedev = tee_device_alloc(&tstee_desc, NULL, tstee->pool, tstee); + if (IS_ERR(tstee->teedev)) { + rc = PTR_ERR(tstee->teedev); + tstee->teedev = NULL; + goto err_free_pool; + } + + rc = tee_device_register(tstee->teedev); + if (rc) + goto err_unreg_teedev; + + ffa_dev_set_drvdata(ffa_dev, tstee); + + return 0; + +err_unreg_teedev: + tee_device_unregister(tstee->teedev); +err_free_pool: + tee_shm_pool_free(tstee->pool); +err_free_tstee: + kfree(tstee); + return rc; +} + +static void tstee_remove(struct ffa_device *ffa_dev) +{ + struct tstee *tstee = ffa_dev->dev.driver_data; + + tee_device_unregister(tstee->teedev); + tee_shm_pool_free(tstee->pool); + kfree(tstee); +} + +static const struct ffa_device_id tstee_device_ids[] = { + /* TS RPC protocol UUID: bdcd76d7-825e-4751-963b-86d4f84943ac */ + { TS_RPC_UUID }, + {} +}; + +static struct ffa_driver tstee_driver = { + .name = "arm_tstee", + .probe = tstee_probe, + .remove = tstee_remove, + .id_table = tstee_device_ids, +}; + +module_ffa_driver(tstee_driver); + +MODULE_AUTHOR("Balint Dobszay <balint.dobszay@arm.com>"); +MODULE_DESCRIPTION("Arm Trusted Services TEE driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/tee/tstee/tstee_private.h b/drivers/tee/tstee/tstee_private.h new file mode 100644 index 0000000000..8e58725b57 --- /dev/null +++ b/drivers/tee/tstee/tstee_private.h @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2023, Arm Limited + */ + +#ifndef TSTEE_PRIVATE_H +#define TSTEE_PRIVATE_H + +#include <linux/arm_ffa.h> +#include <linux/bitops.h> +#include <linux/tee_core.h> +#include <linux/types.h> +#include <linux/uuid.h> +#include <linux/xarray.h> + +/* + * The description of the ABI implemented in this file is available at + * https://trusted-services.readthedocs.io/en/v1.0.0/developer/service-access-protocols.html#abi + */ + +/* UUID of this protocol */ +#define TS_RPC_UUID UUID_INIT(0xbdcd76d7, 0x825e, 0x4751, \ + 0x96, 0x3b, 0x86, 0xd4, 0xf8, 0x49, 0x43, 0xac) + +/* Protocol version*/ +#define TS_RPC_PROTOCOL_VERSION (1) + +/* Status codes */ +#define TS_RPC_OK (0) + +/* RPC control register */ +#define TS_RPC_CTRL_REG (0) +#define OPCODE_MASK GENMASK(15, 0) +#define IFACE_ID_MASK GENMASK(23, 16) +#define TS_RPC_CTRL_OPCODE(x) ((u16)(FIELD_GET(OPCODE_MASK, (x)))) +#define TS_RPC_CTRL_IFACE_ID(x) ((u8)(FIELD_GET(IFACE_ID_MASK, (x)))) +#define TS_RPC_CTRL_PACK_IFACE_OPCODE(i, o) \ + (FIELD_PREP(IFACE_ID_MASK, (i)) | FIELD_PREP(OPCODE_MASK, (o))) +#define TS_RPC_CTRL_SAP_RC BIT(30) +#define TS_RPC_CTRL_SAP_ERR BIT(31) + +/* Interface ID for RPC management operations */ +#define TS_RPC_MGMT_IFACE_ID (0xff) + +/* Management calls */ +#define TS_RPC_OP_GET_VERSION (0x0000) +#define TS_RPC_GET_VERSION_RESP (1) + +#define TS_RPC_OP_RETRIEVE_MEM (0x0001) +#define TS_RPC_RETRIEVE_MEM_HANDLE_LSW (1) +#define TS_RPC_RETRIEVE_MEM_HANDLE_MSW (2) +#define TS_RPC_RETRIEVE_MEM_TAG_LSW (3) +#define TS_RPC_RETRIEVE_MEM_TAG_MSW (4) +#define TS_RPC_RETRIEVE_MEM_RPC_STATUS (1) + +#define TS_RPC_OP_RELINQ_MEM (0x0002) +#define TS_RPC_RELINQ_MEM_HANDLE_LSW (1) +#define TS_RPC_RELINQ_MEM_HANDLE_MSW (2) +#define TS_RPC_RELINQ_MEM_RPC_STATUS (1) + +#define TS_RPC_OP_SERVICE_INFO (0x0003) +#define TS_RPC_SERVICE_INFO_UUID0 (1) +#define TS_RPC_SERVICE_INFO_UUID1 (2) +#define TS_RPC_SERVICE_INFO_UUID2 (3) +#define TS_RPC_SERVICE_INFO_UUID3 (4) +#define TS_RPC_SERVICE_INFO_RPC_STATUS (1) +#define TS_RPC_SERVICE_INFO_IFACE (2) + +/* Service call */ +#define TS_RPC_SERVICE_MEM_HANDLE_LSW (1) +#define TS_RPC_SERVICE_MEM_HANDLE_MSW (2) +#define TS_RPC_SERVICE_REQ_LEN (3) +#define TS_RPC_SERVICE_CLIENT_ID (4) +#define TS_RPC_SERVICE_RPC_STATUS (1) +#define TS_RPC_SERVICE_STATUS (2) +#define TS_RPC_SERVICE_RESP_LEN (3) + +struct tstee { + struct ffa_device *ffa_dev; + struct tee_device *teedev; + struct tee_shm_pool *pool; +}; + +struct ts_session { + u8 iface_id; +}; + +struct ts_context_data { + struct xarray sess_list; +}; + +#endif /* TSTEE_PRIVATE_H */ |