diff options
Diffstat (limited to 'meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0033-ANDROID-trusty-Add-trusty-ffa-driver.patch')
| -rw-r--r-- | meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0033-ANDROID-trusty-Add-trusty-ffa-driver.patch | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0033-ANDROID-trusty-Add-trusty-ffa-driver.patch b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0033-ANDROID-trusty-Add-trusty-ffa-driver.patch new file mode 100644 index 0000000000..4c70e34d12 --- /dev/null +++ b/meta-arm/meta-arm-bsp/recipes-kernel/linux/linux-arm64-ack-5.15/tc/0033-ANDROID-trusty-Add-trusty-ffa-driver.patch @@ -0,0 +1,313 @@ +From 34236d8df51d00d1167481760fda5abb56850765 Mon Sep 17 00:00:00 2001 +From: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com> +Date: Fri, 14 Jan 2022 18:47:08 +0000 +Subject: [PATCH 33/40] ANDROID: trusty: Add trusty-ffa driver + +Initial changes related to FFA transport support + - Adds FFA transport descriptor + - Defines Trusty UUID + - Initializes FFA transport does probe, sets ffa_ops + - Defers Trusty probe if ARM FF-A driver is not initialized or + Trusty SP not found. + - Link FF-A device as the supplier for Trusty platform device. + +Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com> +Change-Id: I78f72b85c20e4bad4c24cf0826e96f27dcf2ee1d +Upstream-Status: Pending [Not submitted to upstream yet] +Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com +--- + drivers/trusty/Makefile | 1 + + drivers/trusty/trusty-ffa.c | 196 ++++++++++++++++++++++++++++++++ + drivers/trusty/trusty-ffa.h | 28 +++++ + drivers/trusty/trusty-private.h | 1 + + drivers/trusty/trusty.c | 6 + + 5 files changed, 232 insertions(+) + create mode 100644 drivers/trusty/trusty-ffa.c + create mode 100644 drivers/trusty/trusty-ffa.h + +diff --git a/drivers/trusty/Makefile b/drivers/trusty/Makefile +index fbb53ee93003..797d61bf68ef 100644 +--- a/drivers/trusty/Makefile ++++ b/drivers/trusty/Makefile +@@ -6,6 +6,7 @@ + obj-$(CONFIG_TRUSTY) += trusty-core.o + trusty-core-objs += trusty.o trusty-mem.o + trusty-core-objs += trusty-smc.o ++trusty-core-objs += trusty-ffa.o + trusty-core-$(CONFIG_ARM) += trusty-smc-arm.o + trusty-core-$(CONFIG_ARM64) += trusty-smc-arm64.o + obj-$(CONFIG_TRUSTY_IRQ) += trusty-irq.o +diff --git a/drivers/trusty/trusty-ffa.c b/drivers/trusty/trusty-ffa.c +new file mode 100644 +index 000000000000..c8c16a1fc700 +--- /dev/null ++++ b/drivers/trusty/trusty-ffa.c +@@ -0,0 +1,196 @@ ++/* SPDX-License-Identifier: GPL-2.0-only */ ++/* ++ * Copyright (C) 2022 ARM Ltd. ++ */ ++ ++#include <linux/platform_device.h> ++#include <linux/slab.h> ++#include <linux/trusty/smcall.h> ++#include <linux/arm_ffa.h> ++#include <linux/trusty/trusty.h> ++ ++#include <linux/scatterlist.h> ++#include <linux/dma-mapping.h> ++ ++#include "trusty-ffa.h" ++#include "trusty-private.h" ++ ++static const struct trusty_mem_ops trusty_ffa_mem_ops = { ++ .desc = &trusty_ffa_transport, ++}; ++ ++static const struct ffa_device_id trusty_ffa_device_id[] = { ++ /* ++ * Trusty UID: RFC-4122 compliant UUID version 4 ++ * 40ee25f0-a2bc-304c-8c4ca173c57d8af1 ++ */ ++ { UUID_INIT(0x40ee25f0, 0xa2bc, 0x304c, ++ 0x8c, 0x4c, 0xa1, 0x73, 0xc5, 0x7d, 0x8a, 0xf1) }, ++ {} ++}; ++ ++static int trusty_ffa_dev_match(struct device *dev, const void *uuid) ++{ ++ struct ffa_device *ffa_dev; ++ ++ ffa_dev = to_ffa_dev(dev); ++ if (uuid_equal(&ffa_dev->uuid, uuid)) ++ return 1; ++ ++ return 0; ++} ++ ++static struct ffa_device *trusty_ffa_dev_find(void) ++{ ++ const void *data; ++ struct device *dev; ++ ++ /* currently only one trusty instance is probed */ ++ data = &trusty_ffa_device_id[0].uuid; ++ ++ dev = bus_find_device(&ffa_bus_type, NULL, data, trusty_ffa_dev_match); ++ if (dev) { ++ /* drop reference count */ ++ put_device(dev); ++ return to_ffa_dev(dev); ++ } ++ ++ return NULL; ++} ++ ++static int trusty_ffa_link_supplier(struct device *c_dev, struct device *s_dev) ++{ ++ if (!c_dev || !s_dev) ++ return -EINVAL; ++ ++ if (!device_link_add(c_dev, s_dev, DL_FLAG_AUTOREMOVE_CONSUMER)) { ++ return -ENODEV; ++ } ++ ++ return 0; ++} ++ ++/* ++ * called from trusty probe ++ */ ++static int trusty_ffa_transport_setup(struct device *dev) ++{ ++ int rc; ++ struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); ++ struct trusty_ffa_state *ffa_state; ++ struct ffa_device *ffa_dev; ++ ++ /* ffa transport not required for lower api versions */ ++ if (s->api_version != 0 && s->api_version < TRUSTY_API_VERSION_MEM_OBJ) { ++ return -EINVAL; ++ } ++ ++ ffa_dev = trusty_ffa_dev_find(); ++ if (!ffa_dev) { ++ dev_dbg(dev, "FFA: Trusty device not found defer probe\n"); ++ return -EPROBE_DEFER; ++ } ++ ++ ffa_state = ffa_dev_get_drvdata(ffa_dev); ++ if (!ffa_state) ++ return -EINVAL; ++ ++ rc = trusty_ffa_link_supplier(dev, &ffa_dev->dev); ++ if (rc != 0) ++ return rc; ++ ++ /* FFA used only for memory sharing operations */ ++ if (s->api_version == TRUSTY_API_VERSION_MEM_OBJ) { ++ s->ffa = ffa_state; ++ s->mem_ops = &trusty_ffa_mem_ops; ++ return 0; ++ } ++ ++ return -EINVAL; ++} ++ ++static void trusty_ffa_transport_cleanup(struct device *dev) ++{ ++ struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); ++ ++ /* ffa transport not setup for lower api versions */ ++ if (s->api_version < TRUSTY_API_VERSION_MEM_OBJ) { ++ return; ++ } ++ ++ s->ffa = NULL; ++ s->mem_ops = NULL; ++} ++ ++static int trusty_ffa_probe(struct ffa_device *ffa_dev) ++{ ++ const struct ffa_dev_ops *ffa_ops; ++ struct trusty_ffa_state *s; ++ u32 ffa_drv_version; ++ ++ ffa_ops = ffa_dev_ops_get(ffa_dev); ++ if (!ffa_ops) { ++ dev_dbg(&ffa_dev->dev, "ffa_dev_ops_get: failed\n"); ++ return -ENOENT; ++ } ++ ++ /* check ffa driver version compatibility */ ++ ffa_drv_version = ffa_ops->api_version_get(); ++ if (TO_TRUSTY_FFA_MAJOR(ffa_drv_version) != TRUSTY_FFA_VERSION_MAJOR || ++ TO_TRUSTY_FFA_MINOR(ffa_drv_version) < TRUSTY_FFA_VERSION_MINOR) ++ return -EINVAL; ++ ++ s = kzalloc(sizeof(*s), GFP_KERNEL); ++ if (!s) ++ return -ENOMEM; ++ ++ s->dev = &ffa_dev->dev; ++ s->ops = ffa_ops; ++ mutex_init(&s->share_memory_msg_lock); ++ ffa_dev_set_drvdata(ffa_dev, s); ++ ++ ffa_ops->mode_32bit_set(ffa_dev); ++ ++ return 0; ++} ++ ++static void trusty_ffa_remove(struct ffa_device *ffa_dev) ++{ ++ struct trusty_ffa_state *s; ++ ++ s = ffa_dev_get_drvdata(ffa_dev); ++ ++ mutex_destroy(&s->share_memory_msg_lock); ++ memset(s, 0, sizeof(struct trusty_ffa_state)); ++ kfree(s); ++} ++ ++static struct ffa_driver trusty_ffa_driver = { ++ .name = "trusty-ffa", ++ .probe = trusty_ffa_probe, ++ .remove = trusty_ffa_remove, ++ .id_table = trusty_ffa_device_id, ++}; ++ ++static int __init trusty_ffa_transport_init(void) ++{ ++ if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)) { ++ return ffa_register(&trusty_ffa_driver); ++ } else ++ return -ENODEV; ++} ++ ++static void __exit trusty_ffa_transport_exit(void) ++{ ++ if (IS_REACHABLE(CONFIG_ARM_FFA_TRANSPORT)) ++ ffa_unregister(&trusty_ffa_driver); ++} ++ ++const struct trusty_transport_desc trusty_ffa_transport = { ++ .name = "ffa", ++ .setup = trusty_ffa_transport_setup, ++ .cleanup = trusty_ffa_transport_cleanup, ++}; ++ ++module_init(trusty_ffa_transport_init); ++module_exit(trusty_ffa_transport_exit); +diff --git a/drivers/trusty/trusty-ffa.h b/drivers/trusty/trusty-ffa.h +new file mode 100644 +index 000000000000..267ca2c5db29 +--- /dev/null ++++ b/drivers/trusty/trusty-ffa.h +@@ -0,0 +1,28 @@ ++/* SPDX-License-Identifier: GPL-2.0-only */ ++/* ++ * Copyright (C) 2022 ARM Ltd. ++ */ ++ ++#ifndef __LINUX_TRUSTY_FFA_H ++#define __LINUX_TRUSTY_FFA_H ++ ++#include <linux/types.h> ++#include <linux/uuid.h> ++#include <linux/arm_ffa.h> ++ ++#define TRUSTY_FFA_VERSION_MAJOR (1U) ++#define TRUSTY_FFA_VERSION_MINOR (0U) ++#define TRUSTY_FFA_VERSION_MAJOR_SHIFT (16U) ++#define TRUSTY_FFA_VERSION_MAJOR_MASK (0x7fffU) ++#define TRUSTY_FFA_VERSION_MINOR_SHIFT (0U) ++#define TRUSTY_FFA_VERSION_MINOR_MASK (0U) ++ ++#define TO_TRUSTY_FFA_MAJOR(v) \ ++ ((u16)((v >> TRUSTY_FFA_VERSION_MAJOR_SHIFT) & \ ++ TRUSTY_FFA_VERSION_MAJOR_MASK)) ++ ++#define TO_TRUSTY_FFA_MINOR(v) \ ++ ((u16)((v >> TRUSTY_FFA_VERSION_MINOR_SHIFT) & \ ++ TRUSTY_FFA_VERSION_MINOR_MASK)) ++ ++#endif /* __LINUX_TRUSTY_FFA_H */ +diff --git a/drivers/trusty/trusty-private.h b/drivers/trusty/trusty-private.h +index 74b88bb8f83b..2496f397e5d2 100644 +--- a/drivers/trusty/trusty-private.h ++++ b/drivers/trusty/trusty-private.h +@@ -73,5 +73,6 @@ int trusty_init_api_version(struct trusty_state *s, struct device *dev, + typedef const struct trusty_transport_desc *trusty_transports_t; + + extern const struct trusty_transport_desc trusty_smc_transport; ++extern const struct trusty_transport_desc trusty_ffa_transport; + + #endif /* _TRUSTY_PRIVATE_H */ +diff --git a/drivers/trusty/trusty.c b/drivers/trusty/trusty.c +index ec0fccfaa24c..4686b0d34f61 100644 +--- a/drivers/trusty/trusty.c ++++ b/drivers/trusty/trusty.c +@@ -509,6 +509,11 @@ trusty_transports_setup(const trusty_transports_t *transports, + return -EINVAL; + + ret = transport->setup(dev); ++ if (ret == -EPROBE_DEFER) { ++ dev_notice(dev, "transport %s: defer probe\n", ++ transport->name); ++ return ret; ++ } + transports_ret &= ret; + } + +@@ -672,6 +677,7 @@ static int trusty_remove(struct platform_device *pdev) + */ + static const trusty_transports_t trusty_transports[] = { + &trusty_smc_transport, ++ &trusty_ffa_transport, + NULL, + }; + +-- +2.34.1 + |