diff options
Diffstat (limited to 'meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0032-ANDROID-trusty-Add-transport-descriptor.patch')
| -rw-r--r-- | meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0032-ANDROID-trusty-Add-transport-descriptor.patch | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0032-ANDROID-trusty-Add-transport-descriptor.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0032-ANDROID-trusty-Add-transport-descriptor.patch new file mode 100644 index 0000000000..340e12dc64 --- /dev/null +++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0032-ANDROID-trusty-Add-transport-descriptor.patch @@ -0,0 +1,210 @@ +From e7fe12a5a7e3eac7a7d549ef9a7d88e9baba1832 Mon Sep 17 00:00:00 2001 +From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com> +Date: Fri, 14 Jan 2022 17:52:33 +0000 +Subject: [PATCH 32/40] ANDROID: trusty: Add transport descriptor + +Use transport descriptor to hold transport specific operations. This +helps to add new transport to Trusty core. + +Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com> +Change-Id: Ibbde50de0302f6d259a7d572f0910067ce712b37 +Upstream-Status: Pending [Not submitted to upstream yet] +Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com +--- + drivers/trusty/trusty-private.h | 20 +++++++++- + drivers/trusty/trusty-smc.c | 6 +++ + drivers/trusty/trusty.c | 71 ++++++++++++++++++++++++++++++--- + 3 files changed, 90 insertions(+), 7 deletions(-) + +diff --git a/drivers/trusty/trusty-private.h b/drivers/trusty/trusty-private.h +index 4d73c6ae35d4..74b88bb8f83b 100644 +--- a/drivers/trusty/trusty-private.h ++++ b/drivers/trusty/trusty-private.h +@@ -14,12 +14,14 @@ struct trusty_work { + }; + + struct trusty_msg_ops { ++ const struct trusty_transport_desc *desc; + u32 (*send_direct_msg)(struct device *dev, unsigned long fid, + unsigned long a0, unsigned long a1, + unsigned long a2); + }; + + struct trusty_mem_ops { ++ const struct trusty_transport_desc *desc; + int (*trusty_share_memory)(struct device *dev, u64 *id, + struct scatterlist *sglist, + unsigned int nents, pgprot_t pgprot, u64 tag); +@@ -46,6 +48,19 @@ struct trusty_state { + struct device_dma_parameters dma_parms; + const struct trusty_msg_ops *msg_ops; + const struct trusty_mem_ops *mem_ops; ++ struct trusty_ffa_state *ffa; ++}; ++ ++struct trusty_ffa_state { ++ struct device *dev; /* ffa device */ ++ const struct ffa_dev_ops *ops; ++ struct mutex share_memory_msg_lock; /* protects share_memory_msg */ ++}; ++ ++struct trusty_transport_desc { ++ const char *name; ++ int (*setup)(struct device *dev); ++ void (*cleanup)(struct device *dev); + }; + + int trusty_init_api_version(struct trusty_state *s, struct device *dev, +@@ -55,7 +70,8 @@ int trusty_init_api_version(struct trusty_state *s, struct device *dev, + unsigned long a1, + unsigned long a2)); + +-int trusty_smc_transport_setup(struct device *dev); +-void trusty_smc_transport_cleanup(struct device *dev); ++typedef const struct trusty_transport_desc *trusty_transports_t; ++ ++extern const struct trusty_transport_desc trusty_smc_transport; + + #endif /* _TRUSTY_PRIVATE_H */ +diff --git a/drivers/trusty/trusty-smc.c b/drivers/trusty/trusty-smc.c +index 8fa841e0e253..62d1d7060744 100644 +--- a/drivers/trusty/trusty-smc.c ++++ b/drivers/trusty/trusty-smc.c +@@ -134,3 +134,9 @@ void trusty_smc_transport_cleanup(struct device *dev) + if (s->mem_ops == &trusty_smc_mem_ops) + s->mem_ops = NULL; + } ++ ++const struct trusty_transport_desc trusty_smc_transport = { ++ .name = "smc", ++ .setup = trusty_smc_transport_setup, ++ .cleanup = trusty_smc_transport_cleanup, ++}; +diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c +index 757dd7b2c527..ec0fccfaa24c 100644 +--- a/drivers/trusty/trusty.c ++++ b/drivers/trusty/trusty.c +@@ -493,6 +493,46 @@ void trusty_dequeue_nop(struct device *dev, struct trusty_nop *nop) + } + EXPORT_SYMBOL(trusty_dequeue_nop); + ++static int ++trusty_transports_setup(const trusty_transports_t *transports, ++ struct device *dev) ++{ ++ const struct trusty_transport_desc *transport; ++ int ret; ++ int transports_ret = -ENODEV; ++ ++ if (!transports) ++ return -EINVAL; ++ ++ for (; (transport = *transports); transports++) { ++ if (!transport->setup) ++ return -EINVAL; ++ ++ ret = transport->setup(dev); ++ transports_ret &= ret; ++ } ++ ++ /* One transport needs to complete setup without error. */ ++ if (transports_ret < 0) ++ return -ENODEV; ++ ++ return 0; ++} ++ ++static void ++trusty_transports_cleanup(const trusty_transports_t *transports, ++ struct device *dev) ++{ ++ const struct trusty_transport_desc *transport; ++ ++ for (; (transport = *transports); transports++) { ++ if (!transport->cleanup) ++ continue; ++ ++ transport->cleanup(dev); ++ } ++} ++ + static int trusty_probe(struct platform_device *pdev) + { + int ret; +@@ -500,6 +540,7 @@ static int trusty_probe(struct platform_device *pdev) + work_func_t work_func; + struct trusty_state *s; + struct device_node *node = pdev->dev.of_node; ++ const trusty_transports_t *descs; + + if (!node) { + dev_err(&pdev->dev, "of_node required\n"); +@@ -529,8 +570,12 @@ static int trusty_probe(struct platform_device *pdev) + + platform_set_drvdata(pdev, s); + +- /* Initialize SMC transport */ +- ret = trusty_smc_transport_setup(s->dev); ++ /* ++ * Initialize Trusty transport. Trusty msg and mem ops has to be ++ * initialized as part of transport setup. ++ */ ++ descs = of_device_get_match_data(&pdev->dev); ++ ret = trusty_transports_setup(descs, s->dev); + if (ret != 0 || s->msg_ops == NULL || s->mem_ops == NULL) + goto err_transport_setup; + +@@ -581,7 +626,7 @@ static int trusty_probe(struct platform_device *pdev) + destroy_workqueue(s->nop_wq); + err_create_nop_wq: + kfree(s->version_str); +- trusty_smc_transport_cleanup(s->dev); ++ trusty_transports_cleanup(descs, s->dev); + err_transport_setup: + s->dev->dma_parms = NULL; + device_for_each_child(&pdev->dev, NULL, trusty_remove_child); +@@ -595,6 +640,7 @@ static int trusty_remove(struct platform_device *pdev) + { + unsigned int cpu; + struct trusty_state *s = platform_get_drvdata(pdev); ++ const trusty_transports_t *descs; + + device_for_each_child(&pdev->dev, NULL, trusty_remove_child); + +@@ -606,7 +652,10 @@ static int trusty_remove(struct platform_device *pdev) + free_percpu(s->nop_works); + destroy_workqueue(s->nop_wq); + +- trusty_smc_transport_cleanup(s->dev); ++ /* call transport cleanup */ ++ descs = of_device_get_match_data(&pdev->dev); ++ trusty_transports_cleanup(descs, s->dev); ++ + mutex_destroy(&s->smc_lock); + s->dev->dma_parms = NULL; + kfree(s->version_str); +@@ -614,8 +663,20 @@ static int trusty_remove(struct platform_device *pdev) + return 0; + } + ++/* ++ * Trusty probe will try all compiled in transports and will use the transport ++ * supported by the Trusty kernel. ++ * ++ * For Trusty API version < TRUSTY_API_VERSION_MEM_OBJ: ++ * trusty_smc_transport used for messaging. ++ */ ++static const trusty_transports_t trusty_transports[] = { ++ &trusty_smc_transport, ++ NULL, ++}; ++ + static const struct of_device_id trusty_of_match[] = { +- { .compatible = "android,trusty-v1", }, ++ { .compatible = "android,trusty-v1", .data = trusty_transports }, + {}, + }; + +-- +2.34.1 + |