Some drivers (like ftpm) can operate only after tee-supplicant runs becase of tee-supplicant provides things like storage services. This patch splits probe of non tee-supplicant dependable drivers to early stage, and after tee-supplicant run probe other drivers.
Signed-off-by: Maxim Uvarov maxim.uvarov@linaro.org Suggested-by: Sumit Garg sumit.garg@linaro.org Suggested-by: Arnd Bergmann arnd@linaro.org --- drivers/tee/optee/core.c | 28 +++++++++++++++++++++++++--- drivers/tee/optee/device.c | 17 +++++++++++------ drivers/tee/optee/optee_private.h | 10 +++++++++- 3 files changed, 45 insertions(+), 10 deletions(-)
diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c index 99698b8a3a74..d059e3ac491c 100644 --- a/drivers/tee/optee/core.c +++ b/drivers/tee/optee/core.c @@ -17,6 +17,7 @@ #include <linux/tee_drv.h> #include <linux/types.h> #include <linux/uaccess.h> +#include <linux/workqueue.h> #include "optee_private.h" #include "optee_smc.h" #include "shm_pool.h" @@ -218,6 +219,15 @@ static void optee_get_version(struct tee_device *teedev, *vers = v; }
+static void optee_bus_scan(struct work_struct *work) +{ + int rc; + + rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES_SUPP); + if (rc) + pr_err("optee_enumerate_devices failed %d\n", rc); +} + static int optee_open(struct tee_context *ctx) { struct optee_context_data *ctxdata; @@ -241,8 +251,18 @@ static int optee_open(struct tee_context *ctx) kfree(ctxdata); return -EBUSY; } - }
+ if (!optee->scan_bus_done) { + INIT_WORK(&optee->scan_bus_work, optee_bus_scan); + optee->scan_bus_wq = create_workqueue("optee_bus_scan"); + if (!optee->scan_bus_wq) { + pr_err("optee: couldn't create workqueue\n"); + return -ECHILD; + } + queue_work(optee->scan_bus_wq, &optee->scan_bus_work); + optee->scan_bus_done = true; + } + } mutex_init(&ctxdata->mutex); INIT_LIST_HEAD(&ctxdata->sess_list);
@@ -296,8 +316,10 @@ static void optee_release(struct tee_context *ctx)
ctx->data = NULL;
- if (teedev == optee->supp_teedev) + if (teedev == optee->supp_teedev) { + destroy_workqueue(optee->scan_bus_wq); optee_supp_release(&optee->supp); + } }
static const struct tee_driver_ops optee_ops = { @@ -675,7 +697,7 @@ static int optee_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, optee);
- rc = optee_enumerate_devices(); + rc = optee_enumerate_devices(PTA_CMD_GET_DEVICES); if (rc) { optee_remove(pdev); return rc; diff --git a/drivers/tee/optee/device.c b/drivers/tee/optee/device.c index e3a148521ec1..d4931dad07aa 100644 --- a/drivers/tee/optee/device.c +++ b/drivers/tee/optee/device.c @@ -21,7 +21,6 @@ * TEE_ERROR_BAD_PARAMETERS - Incorrect input param * TEE_ERROR_SHORT_BUFFER - Output buffer size less than required */ -#define PTA_CMD_GET_DEVICES 0x0
static int optee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) { @@ -32,7 +31,8 @@ static int optee_ctx_match(struct tee_ioctl_version_data *ver, const void *data) }
static int get_devices(struct tee_context *ctx, u32 session, - struct tee_shm *device_shm, u32 *shm_size) + struct tee_shm *device_shm, u32 *shm_size, + u32 func) { int ret = 0; struct tee_ioctl_invoke_arg inv_arg; @@ -42,7 +42,7 @@ static int get_devices(struct tee_context *ctx, u32 session, memset(¶m, 0, sizeof(param));
/* Invoke PTA_CMD_GET_DEVICES function */ - inv_arg.func = PTA_CMD_GET_DEVICES; + inv_arg.func = func; inv_arg.session = session; inv_arg.num_params = 4;
@@ -87,7 +87,7 @@ static int optee_register_device(const uuid_t *device_uuid, u32 device_id) return rc; }
-int optee_enumerate_devices(void) +static int __optee_enumerate_devices(u32 func) { const uuid_t pta_uuid = UUID_INIT(0x7011a688, 0xddde, 0x4053, @@ -118,7 +118,7 @@ int optee_enumerate_devices(void) goto out_ctx; }
- rc = get_devices(ctx, sess_arg.session, NULL, &shm_size); + rc = get_devices(ctx, sess_arg.session, NULL, &shm_size, func); if (rc < 0 || !shm_size) goto out_sess;
@@ -130,7 +130,7 @@ int optee_enumerate_devices(void) goto out_sess; }
- rc = get_devices(ctx, sess_arg.session, device_shm, &shm_size); + rc = get_devices(ctx, sess_arg.session, device_shm, &shm_size, func); if (rc < 0) goto out_shm;
@@ -158,3 +158,8 @@ int optee_enumerate_devices(void)
return rc; } + +int optee_enumerate_devices(u32 func) +{ + return __optee_enumerate_devices(func); +} diff --git a/drivers/tee/optee/optee_private.h b/drivers/tee/optee/optee_private.h index d9c5037b4e03..8b71839a357e 100644 --- a/drivers/tee/optee/optee_private.h +++ b/drivers/tee/optee/optee_private.h @@ -78,6 +78,9 @@ struct optee_supp { * @memremaped_shm virtual address of memory in shared memory pool * @sec_caps: secure world capabilities defined by * OPTEE_SMC_SEC_CAP_* in optee_smc.h + * @scan_bus_done flag if device registation was already done. + * @scan_bus_wq workqueue to scan optee bus and register optee drivers + * @scan_bus_work workq to scan optee bus and register optee drivers */ struct optee { struct tee_device *supp_teedev; @@ -89,6 +92,9 @@ struct optee { struct tee_shm_pool *pool; void *memremaped_shm; u32 sec_caps; + bool scan_bus_done; + struct workqueue_struct *scan_bus_wq; + struct work_struct scan_bus_work; };
struct optee_session { @@ -173,7 +179,9 @@ void optee_free_pages_list(void *array, size_t num_entries); void optee_fill_pages_list(u64 *dst, struct page **pages, int num_pages, size_t page_offset);
-int optee_enumerate_devices(void); +#define PTA_CMD_GET_DEVICES 0x0 +#define PTA_CMD_GET_DEVICES_SUPP 0x1 +int optee_enumerate_devices(u32 func);
/* * Small helpers