[2/5] arm-bsp/u-boot: corstone1000: introducing Arm FF-A and MM support

Message ID	20211129124002.18352-3-abdellatif.elkhlifi@arm.com
State	New
Headers	show Return-Path: <abdellatif.elkhlifi@arm.com> ip: 217.140.110.172, mailfrom: abdellatif.elkhlifi@arm.com) From: abdellatif.elkhlifi@arm.com To: meta-arm@lists.yoctoproject.org, Ross.Burton@arm.com Cc: nd@arm.com, Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> Subject: [PATCH 2/5] arm-bsp/u-boot: corstone1000: introducing Arm FF-A and MM support Date: Mon, 29 Nov 2021 12:39:59 +0000 Message-Id: <20211129124002.18352-3-abdellatif.elkhlifi@arm.com> In-Reply-To: <20211129124002.18352-1-abdellatif.elkhlifi@arm.com> References: <20211129124002.18352-1-abdellatif.elkhlifi@arm.com>
Series	Corstone1000: FF-A in u-boot , enabling secure partitions in Optee \| expand [0/5] Corstone1000: FF-A in u-boot , enabling secure partitions in Optee [1/5] arm-bsp/optee-os: add a rule in optee-os Makefile for secure partitions [2/5] arm-bsp/u-boot: corstone1000: introducing Arm FF-A and MM support [3/5] arm-bsp/u-boot: corstone1000: introducing EFI capsule update [4/5] arm-bsp/u-boot: corstone1000: adjust the environment and heap sizes [5/5] arm-bsp/linux: setting the FFA_VERSION compatibility checks

diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0018-arm_ffa-introducing-Arm-FF-A-low-level-driver.patch b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0018-arm_ffa-introducing-Arm-FF-A-low-level-driver.patch new file mode 100644 index 0000000..e46095e --- /dev/null +++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0018-arm_ffa-introducing-Arm-FF-A-low-level-driver.patch @@ -0,0 +1,2612 @@ +Upstream-Status: Pending [Not submitted to upstream yet] +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> + +From ebba432b1cfda2b6f0219a8ac220a9b9d3b42a22 Mon Sep 17 00:00:00 2001 +From: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +Date: Wed, 24 Nov 2021 21:04:41 +0000 +Subject: [PATCH 1/5] arm_ffa: introducing Arm FF-A low-level driver + +This driver implements Arm Firmware Framework for Armv8-A on u-boot + +The Firmware Framework for Arm A-profile processors (FF-A) +describes interfaces (ABIs) that standardize communication +between the Secure World and Normal World leveraging TrustZone +technology. + +This driver is based on FF-A specification v1.0 and uses SMC32 +calling convention. + +FF-A specification: + +https://developer.arm.com/documentation/den0077/a/?lang=en + +The driver provides helper FF-A interfaces for user layers. +These helper functions allow clients to pass data and select the +FF-A function to use for the communication with secure world. + +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +--- + MAINTAINERS | 8 + + arch/arm/cpu/armv8/smccc-call.S | 27 + + arch/arm/lib/asm-offsets.c | 6 + + common/board_r.c | 6 + + drivers/Kconfig | 2 + + drivers/Makefile | 1 + + drivers/arm-ffa/Kconfig | 26 + + drivers/arm-ffa/Makefile | 3 + + drivers/arm-ffa/arm-ffa-uclass.c | 67 ++ + drivers/arm-ffa/arm_ffa_prv.h | 199 ++++ + drivers/arm-ffa/core.c | 1484 ++++++++++++++++++++++++++++++ + include/arm_ffa.h | 191 ++++ + include/arm_ffa_helper.h | 45 + + include/dm/uclass-id.h | 1 + + include/linux/arm-smccc.h | 28 +- + lib/Kconfig | 1 + + lib/Makefile | 1 + + lib/arm-ffa/Kconfig | 6 + + lib/arm-ffa/Makefile | 8 + + lib/arm-ffa/arm_ffa_helper.c | 188 ++++ + lib/efi_loader/efi_boottime.c | 17 + + 21 files changed, 2314 insertions(+), 1 deletion(-) + create mode 100644 drivers/arm-ffa/Kconfig + create mode 100644 drivers/arm-ffa/Makefile + create mode 100644 drivers/arm-ffa/arm-ffa-uclass.c + create mode 100644 drivers/arm-ffa/arm_ffa_prv.h + create mode 100644 drivers/arm-ffa/core.c + create mode 100644 include/arm_ffa.h + create mode 100644 include/arm_ffa_helper.h + create mode 100644 lib/arm-ffa/Kconfig + create mode 100644 lib/arm-ffa/Makefile + create mode 100644 lib/arm-ffa/arm_ffa_helper.c + +diff --git a/MAINTAINERS b/MAINTAINERS +index 5370b55064..3f61e374aa 100644 +--- a/MAINTAINERS ++++ b/MAINTAINERS +@@ -215,6 +215,14 @@ F: board/CZ.NIC/ + F: configs/turris_*_defconfig + F: include/configs/turris_*.h + ++ARM FF-A ++M: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++S: Maintained ++F: drivers/arm-ffa/ ++F: include/arm_ffa.h ++F: include/arm_ffa_helper.h ++F: lib/arm-ffa/ ++ + ARM FREESCALE IMX + M: Stefano Babic <sbabic@denx.de> + M: Fabio Estevam <festevam@gmail.com> +diff --git a/arch/arm/cpu/armv8/smccc-call.S b/arch/arm/cpu/armv8/smccc-call.S +index dc92b28777..ffc39c9fef 100644 +--- a/arch/arm/cpu/armv8/smccc-call.S ++++ b/arch/arm/cpu/armv8/smccc-call.S +@@ -1,6 +1,8 @@ + /* SPDX-License-Identifier: GPL-2.0 */ + /* + * Copyright (c) 2015, Linaro Limited ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> + */ + #include <linux/linkage.h> + #include <linux/arm-smccc.h> +@@ -45,3 +47,28 @@ ENDPROC(__arm_smccc_smc) + ENTRY(__arm_smccc_hvc) + SMCCC hvc + ENDPROC(__arm_smccc_hvc) ++ ++#if (IS_ENABLED(CONFIG_ARM_FFA_TRANSPORT)) ++ ++ .macro FFASMCCC instr ++ .cfi_startproc ++ \instr #0 ++ ldr x9, [sp] ++ stp x0, x1, [x9, #ARM_SMCCC_RES_X0_OFFS] ++ stp x2, x3, [x9, #ARM_SMCCC_RES_X2_OFFS] ++ stp x4, x5, [x9, #ARM_SMCCC_RES_X4_OFFS] ++ stp x6, x7, [x9, #ARM_SMCCC_RES_X6_OFFS] ++ ret ++ .cfi_endproc ++ .endm ++ ++/* ++ * void arm_ffa_smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2, ++ * unsigned long a3, unsigned long a4, unsigned long a5, ++ * unsigned long a6, unsigned long a7, struct arm_smccc_res *res) ++ */ ++ENTRY(__arm_ffa_smccc_smc) ++ FFASMCCC smc ++ENDPROC(__arm_ffa_smccc_smc) ++ ++#endif +diff --git a/arch/arm/lib/asm-offsets.c b/arch/arm/lib/asm-offsets.c +index 1a306ec415..0a94eb6669 100644 +--- a/arch/arm/lib/asm-offsets.c ++++ b/arch/arm/lib/asm-offsets.c +@@ -9,6 +9,8 @@ + * generate asm statements containing #defines, + * compile this file to assembler, and then extract the + * #defines from the assembly-language output. ++ * ++ * (C) Copyright 2021 ARM Limited + */ + + #include <common.h> +@@ -201,6 +203,10 @@ int main(void) + #ifdef CONFIG_ARM_SMCCC + DEFINE(ARM_SMCCC_RES_X0_OFFS, offsetof(struct arm_smccc_res, a0)); + DEFINE(ARM_SMCCC_RES_X2_OFFS, offsetof(struct arm_smccc_res, a2)); ++#if (IS_ENABLED(CONFIG_ARM_FFA_TRANSPORT)) ++ DEFINE(ARM_SMCCC_RES_X4_OFFS, offsetof(struct arm_smccc_res, a4)); ++ DEFINE(ARM_SMCCC_RES_X6_OFFS, offsetof(struct arm_smccc_res, a6)); ++#endif + DEFINE(ARM_SMCCC_QUIRK_ID_OFFS, offsetof(struct arm_smccc_quirk, id)); + DEFINE(ARM_SMCCC_QUIRK_STATE_OFFS, offsetof(struct arm_smccc_quirk, state)); + #endif +diff --git a/common/board_r.c b/common/board_r.c +index 630c2451a2..3fde3acf62 100644 +--- a/common/board_r.c ++++ b/common/board_r.c +@@ -77,6 +77,9 @@ + #ifdef CONFIG_EFI_SETUP_EARLY + #include <efi_loader.h> + #endif ++#ifdef CONFIG_ARM_FFA_TRANSPORT ++#include <arm_ffa_helper.h> ++#endif + + DECLARE_GLOBAL_DATA_PTR; + +@@ -781,6 +784,9 @@ static init_fnc_t init_sequence_r[] = { + INIT_FUNC_WATCHDOG_RESET + initr_net, + #endif ++#ifdef CONFIG_ARM_FFA_TRANSPORT ++ ffa_helper_init_device, ++#endif + #ifdef CONFIG_POST + initr_post, + #endif +diff --git a/drivers/Kconfig b/drivers/Kconfig +index 417d6f88c2..75e78f339e 100644 +--- a/drivers/Kconfig ++++ b/drivers/Kconfig +@@ -6,6 +6,8 @@ source "drivers/core/Kconfig" + + source "drivers/adc/Kconfig" + ++source "drivers/arm-ffa/Kconfig" ++ + source "drivers/ata/Kconfig" + + source "drivers/axi/Kconfig" +diff --git a/drivers/Makefile b/drivers/Makefile +index fd218c9056..d006fe9d1c 100644 +--- a/drivers/Makefile ++++ b/drivers/Makefile +@@ -113,6 +113,7 @@ obj-y += input/ + obj-y += smem/ + obj-y += thermal/ + obj-$(CONFIG_TEE) += tee/ ++obj-$(CONFIG_ARM_FFA_TRANSPORT) += arm-ffa/ + obj-y += axi/ + obj-y += ufs/ + obj-$(CONFIG_W1) += w1/ +diff --git a/drivers/arm-ffa/Kconfig b/drivers/arm-ffa/Kconfig +new file mode 100644 +index 0000000000..d71444c1fa +--- /dev/null ++++ b/drivers/arm-ffa/Kconfig +@@ -0,0 +1,26 @@ ++# SPDX-License-Identifier: GPL-2.0 ++ ++config ARM_FFA_TRANSPORT ++ bool "Enable Arm Firmware Framework for Armv8-A driver" ++ depends on DM && ARM64 ++ select ARM_SMCCC ++ select LIB_UUID ++ select ARM_FFA_TRANSPORT_HELPERS ++ select CMD_ARMFFA ++ help ++ The Firmware Framework for Arm A-profile processors (FF-A) ++ describes interfaces (ABIs) that standardize communication ++ between the Secure World and Normal World leveraging TrustZone ++ technology. ++ ++ This driver is based on FF-A specification v1.0 and uses SMC32 ++ calling convention. ++ ++ FF-A specification: ++ ++ https://developer.arm.com/documentation/den0077/a/?lang=en ++ ++ In u-boot FF-A design, the Secure World is considered as one ++ entity to communicate with. FF-A communication is handled by ++ one device and one instance. This device takes care of ++ all the interactions between Normal world and Secure World. +diff --git a/drivers/arm-ffa/Makefile b/drivers/arm-ffa/Makefile +new file mode 100644 +index 0000000000..9fb5bea522 +--- /dev/null ++++ b/drivers/arm-ffa/Makefile +@@ -0,0 +1,3 @@ ++# SPDX-License-Identifier: GPL-2.0+ ++ ++obj-y += arm-ffa-uclass.o core.o +diff --git a/drivers/arm-ffa/arm-ffa-uclass.c b/drivers/arm-ffa/arm-ffa-uclass.c +new file mode 100644 +index 0000000000..43f6066281 +--- /dev/null ++++ b/drivers/arm-ffa/arm-ffa-uclass.c +@@ -0,0 +1,67 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#include <common.h> ++#include <dm.h> ++#include <arm_ffa.h> ++#include <errno.h> ++#include <log.h> ++#include <asm/global_data.h> ++ ++DECLARE_GLOBAL_DATA_PTR; ++ ++UCLASS_DRIVER(ffa) = { ++ .name = "ffa", ++ .id = UCLASS_FFA, ++}; ++ ++/** ++ * ffa_get_invoke_func - performs a call to the FF-A driver dispatcher ++ * @func_id: The FF-A function to be used ++ * @func_data: Pointer to the FF-A function arguments ++ * container structure. This also includes ++ * pointers to the returned data needed by ++ * clients. ++ * ++ * This runtime function passes the FF-A function ID and its arguments to ++ * the FF-A driver dispatcher. ++ * This function is called by the FF-A helper functions. ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++int __ffa_runtime ffa_get_invoke_func(u32 func_id, struct ffa_interface_data *func_data) ++{ ++ if (!ffa_device_get_ops()->invoke_func) ++ return -EINVAL; ++ ++ return ffa_device_get_ops()->invoke_func(func_id, func_data); ++} ++ ++/** ++ * ffa_init_device - probes the arm_ffa device ++ * ++ * This boot time function makes sure the arm_ffa device is probed ++ * and ready for use. ++ * This function is called automatically at initcalls ++ * level (after u-boot relocation). ++ * ++ * Arm FF-A transport is implemented through a single u-boot ++ * device (arm_ffa). So, there is only one device belonging to UCLASS_FFA. ++ * All FF-A clients should use the arm_ffa device to use the FF-A ++ * transport. ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++int ffa_init_device(void) ++{ ++ ffa_dbg("[%s]", __func__); ++ ++ return ffa_get_device(); ++} +diff --git a/drivers/arm-ffa/arm_ffa_prv.h b/drivers/arm-ffa/arm_ffa_prv.h +new file mode 100644 +index 0000000000..38ea4ba83e +--- /dev/null ++++ b/drivers/arm-ffa/arm_ffa_prv.h +@@ -0,0 +1,199 @@ ++/* SPDX-License-Identifier: GPL-2.0+ */ ++/* ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#ifndef __ARM_FFA_PRV_H ++#define __ARM_FFA_PRV_H ++ ++#include <arm_ffa.h> ++#include <linux/bitfield.h> ++#include <linux/bitops.h> ++ ++/* ++ * This header is private. It is exclusively used by the FF-A driver ++ */ ++ ++/* FF-A driver version definitions */ ++ ++#define MAJOR_VERSION_MASK GENMASK(30, 16) ++#define MINOR_VERSION_MASK GENMASK(15, 0) ++#define GET_FFA_MAJOR_VERSION(x) \ ++ ((u16)(FIELD_GET(MAJOR_VERSION_MASK, (x)))) ++#define GET_FFA_MINOR_VERSION(x) \ ++ ((u16)(FIELD_GET(MINOR_VERSION_MASK, (x)))) ++#define PACK_VERSION_INFO(major, minor) \ ++ (FIELD_PREP(MAJOR_VERSION_MASK, (major)) | \ ++ FIELD_PREP(MINOR_VERSION_MASK, (minor))) ++ ++#define FFA_MAJOR_VERSION (1) ++#define FFA_MINOR_VERSION (0) ++#define FFA_VERSION_1_0 \ ++ PACK_VERSION_INFO(FFA_MAJOR_VERSION, FFA_MINOR_VERSION) ++ ++/* Endpoint ID mask (u-boot endpoint ID) */ ++ ++#define GET_SELF_ENDPOINT_ID_MASK GENMASK(15, 0) ++#define GET_SELF_ENDPOINT_ID(x) \ ++ ((u16)(FIELD_GET(GET_SELF_ENDPOINT_ID_MASK, (x)))) ++ ++#define PREP_SELF_ENDPOINT_ID_MASK GENMASK(31, 16) ++#define PREP_SELF_ENDPOINT_ID(x) \ ++ ((u16)(FIELD_PREP(PREP_SELF_ENDPOINT_ID_MASK, (x)))) ++ ++/* Partition endpoint ID mask (partition with which u-boot communicates with) */ ++ ++#define PREP_PART_ENDPOINT_ID_MASK GENMASK(15, 0) ++#define PREP_PART_ENDPOINT_ID(x) \ ++ ((u16)(FIELD_PREP(PREP_PART_ENDPOINT_ID_MASK, (x)))) ++ ++/* The FF-A SMC function prototype definition */ ++ ++typedef void (*invoke_ffa_fn_t)(unsigned long a0, unsigned long a1, ++ unsigned long a2, unsigned long a3, unsigned long a4, ++ unsigned long a5, unsigned long a6, unsigned long a7, ++ struct arm_smccc_res *res); ++ ++/** ++ * enum ffa_conduit - Arm FF-A conduits supported by the Arm FF-A driver ++ * Currently only SMC32 is supported. ++ */ ++enum ffa_conduit { ++ FFA_CONDUIT_SMC = 0, ++}; ++ ++/** ++ * FFA_DECLARE_ARGS - FF-A functions local variables ++ * @a0-a7: local variables used to set registers x0-x7 ++ * @res: the structure hosting the FF-A function return data ++ * ++ * A helper macro for declaring local variables for the FF-A functions arguments. ++ * The x0-x7 registers are used to exchange data with the secure world. ++ * But, only the bottom 32-bit of thes registers contains the data. ++ */ ++#define FFA_DECLARE_ARGS \ ++ unsigned long a0 = 0; \ ++ unsigned long a1 = 0; \ ++ unsigned long a2 = 0; \ ++ unsigned long a3 = 0; \ ++ unsigned long a4 = 0; \ ++ unsigned long a5 = 0; \ ++ unsigned long a6 = 0; \ ++ unsigned long a7 = 0; \ ++ struct arm_smccc_res res = {0} ++ ++/* FF-A error codes */ ++#define FFA_ERR_STAT_NOT_SUPPORTED (-1) ++#define FFA_ERR_STAT_INVALID_PARAMETERS (-2) ++#define FFA_ERR_STAT_NO_MEMORY (-3) ++#define FFA_ERR_STAT_BUSY (-4) ++#define FFA_ERR_STAT_INTERRUPTED (-5) ++#define FFA_ERR_STAT_DENIED (-6) ++#define FFA_ERR_STAT_RETRY (-7) ++#define FFA_ERR_STAT_ABORTED (-8) ++ ++/** ++ * struct ffa_features_desc - FF-A functions features ++ * @func_id: FF-A function ++ * @field1: features read from register w2 ++ * @field2: features read from register w3 ++ * ++ * Data structure describing the features of the FF-A functions queried by ++ * FFA_FEATURES ++ */ ++struct ffa_features_desc { ++ u32 func_id; ++ u32 field1; ++ u32 field2; ++}; ++ ++/** ++ * enum ffa_rxtx_buf_sizes - minimum sizes supported ++ * for the RX/TX buffers ++ */ ++enum ffa_rxtx_buf_sizes { ++ RXTX_4K, ++ RXTX_64K, ++ RXTX_16K ++}; ++ ++/* ++ * Number of the FF-A interfaces features descriptors ++ * currently only FFA_RXTX_MAP descriptor is supported ++ */ ++#define FFA_FEATURE_DESC_CNT (1) ++ ++/** ++ * struct ffa_pdata - platform data for the arm_ffa device ++ * @conduit: The FF-A conduit used ++ * ++ * Platform data structure read from the device tree ++ */ ++struct ffa_pdata { ++ enum ffa_conduit conduit; ++}; ++ ++/** ++ * struct ffa_rxtxpair - structure hosting the RX/TX buffers physical addresses ++ * @rxbuf: physical address of the RX buffer ++ * @txbuf: physical address of the TX buffer ++ * ++ * Data structure hosting the physical addresses of the mapped RX/TX buffers ++ * These physical address are used by the FF-A functions that use the RX/TX buffers ++ */ ++struct ffa_rxtxpair { ++ u64 rxbuf; /* physical address */ ++ u64 txbuf; /* physical address */ ++}; ++ ++/** ++ * struct ffa_partition_desc - the secure partition descriptor ++ * @info: partition information ++ * @UUID: UUID ++ * ++ * Each partition has its descriptor containing the partitions information and the UUID ++ */ ++struct ffa_partition_desc { ++ struct ffa_partition_info info; ++ union ffa_partition_uuid UUID; ++}; ++ ++/** ++ * struct ffa_partitions - descriptors for all secure partitions ++ * @count: The number of partitions descriptors ++ * @descs The partitions descriptors table ++ * ++ * This data structure contains the partitions descriptors table ++ */ ++struct ffa_partitions { ++ u32 count; ++ struct ffa_partition_desc *descs; /* virtual address */ ++}; ++ ++/** ++ * struct ffa_prvdata - the driver private data structure ++ * ++ * @dev: The arm_ffa device under u-boot driver model ++ * @fwk_version: FF-A framework version ++ * @id: u-boot endpoint ID ++ * @partitions: The partitions descriptors structure ++ * @pair: The RX/TX buffers pair ++ * @conduit: The selected conduit ++ * @invoke_ffa_fn: The function executing the FF-A function ++ * @features: Table of the FF-A functions having features ++ * ++ * The driver data structure hosting all resident data. ++ */ ++struct ffa_prvdata { ++ struct udevice *dev; ++ u32 fwk_version; ++ u16 id; ++ struct ffa_partitions partitions; ++ struct ffa_rxtxpair pair; ++ enum ffa_conduit conduit; ++ invoke_ffa_fn_t invoke_ffa_fn; ++ struct ffa_features_desc features[FFA_FEATURE_DESC_CNT]; ++}; ++ ++#endif +diff --git a/drivers/arm-ffa/core.c b/drivers/arm-ffa/core.c +new file mode 100644 +index 0000000000..98e2d2fa17 +--- /dev/null ++++ b/drivers/arm-ffa/core.c +@@ -0,0 +1,1484 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#include "arm_ffa_prv.h" ++#include <asm/global_data.h> ++#include <asm/io.h> ++#include <common.h> ++#include <dm.h> ++#include <fdtdec.h> ++#include <linux/errno.h> ++#include <linux/sizes.h> ++#include <log.h> ++#include <malloc.h> ++#include <mapmem.h> ++#include <string.h> ++ ++DECLARE_GLOBAL_DATA_PTR; ++ ++/** ++ * The device private data structure containing all the resident ++ * data read from secure world ++ */ ++struct ffa_prvdata __ffa_runtime_data ffa_priv_data = {0}; ++ ++/* ++ * Driver functions ++ */ ++ ++/** ++ * ffa_get_device - probes the arm_ffa device ++ * ++ * This boot time function makes sure the arm_ffa device is probed ++ * and ready for use. This is done using uclass_get_device. ++ * The arm_ffa driver belongs to UCLASS_FFA. ++ * This function should be called before using the driver. ++ * ++ * Arm FF-A transport is implemented through a single u-boot ++ * device (arm_ffa). So, there is only one device belonging to UCLASS_FFA. ++ * All FF-A clients should use the arm_ffa device to use the FF-A ++ * transport. ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++int ffa_get_device(void) ++{ ++ int ret; ++ int devnum = 0; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (ffa_priv_data.dev) ++ return FFA_ERR_STAT_SUCCESS; ++ ++ /* ++ * searching and probing the device ++ */ ++ ret = uclass_get_device(UCLASS_FFA, devnum, &ffa_priv_data.dev); ++ if (ret) { ++ ffa_err("can not find the device"); ++ ffa_priv_data.dev = NULL; ++ return -ENODEV; ++ } ++ ++ return FFA_ERR_STAT_SUCCESS; ++} ++ ++/** ++ * ffa_get_version - FFA_VERSION handler function ++ * ++ * This is the boot time function that implements FFA_VERSION FF-A function ++ * to get from the secure world the FF-A framework version ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_get_version(void) ++{ ++ u16 major, minor; ++ ++ FFA_DECLARE_ARGS; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!ffa_priv_data.invoke_ffa_fn) ++ panic("[FFA] no private data found\n"); ++ ++ a0 = FFA_VERSION; ++ a1 = FFA_VERSION_1_0; ++ ffa_priv_data.invoke_ffa_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res); ++ ++ if (res.a0 == FFA_ERR_STAT_NOT_SUPPORTED) { ++ ffa_err("A Firmware Framework implementation does not exist"); ++ return -EOPNOTSUPP; ++ } ++ ++ major = GET_FFA_MAJOR_VERSION(res.a0); ++ minor = GET_FFA_MINOR_VERSION(res.a0); ++ ++ ffa_info("FF-A driver %d.%d\nFF-A framework %d.%d", ++ FFA_MAJOR_VERSION, FFA_MINOR_VERSION, major, minor); ++ ++ if ((major == FFA_MAJOR_VERSION && minor >= FFA_MINOR_VERSION)) { ++ ffa_info("Versions are compatible "); ++ ++ ffa_priv_data.fwk_version = res.a0; ++ ++ return FFA_ERR_STAT_SUCCESS; ++ } ++ ++ ffa_info("Versions are incompatible "); ++ return -EPROTONOSUPPORT; ++} ++ ++/** ++ * ffa_get_endpoint_id - FFA_ID_GET handler function ++ * ++ * This is the boot time function that implements FFA_ID_GET FF-A function ++ * to get from the secure world u-boot endpoint ID ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_get_endpoint_id(void) ++{ ++ FFA_DECLARE_ARGS; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!ffa_priv_data.invoke_ffa_fn) ++ panic("[FFA] no private data found\n"); ++ ++ a0 = FFA_ID_GET; ++ ++ ffa_priv_data.invoke_ffa_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res); ++ ++ switch (res.a0) { ++ case FFA_ERROR: ++ { ++ if (((int)res.a2) == FFA_ERR_STAT_NOT_SUPPORTED) { ++ ffa_err("This function is not implemented at this FF-A instance"); ++ return -EOPNOTSUPP; ++ } ++ ++ ffa_err("Undefined error code (%d)", ((int)res.a2)); ++ return -EINVAL; ++ } ++ case FFA_SUCCESS: ++ { ++ ffa_priv_data.id = GET_SELF_ENDPOINT_ID(res.a2); ++ ffa_info("endpoint ID is %u", ffa_priv_data.id); ++ ++ return FFA_ERR_STAT_SUCCESS; ++ } ++ default: ++ { ++ ffa_err("Undefined response function (0x%lx)", res.a0); ++ return -EINVAL; ++ } ++ } ++} ++ ++/** ++ * ffa_get_features_desc - returns the features descriptor of the specified ++ * FF-A function ++ * @func_id: the FF-A function which the features are to be retrieved ++ * ++ * This is a boot time function that searches the features descriptor of the ++ * specified FF-A function ++ * ++ * Return: ++ * ++ * When found, the address of the features descriptor is returned. Otherwise, NULL. ++ */ ++static struct ffa_features_desc *ffa_get_features_desc(u32 func_id) ++{ ++ u32 desc_idx; ++ ++ /* ++ * search for the descriptor of the selected FF-A interface ++ */ ++ for (desc_idx = 0; desc_idx < FFA_FEATURE_DESC_CNT ; desc_idx++) ++ if (ffa_priv_data.features[desc_idx].func_id == func_id) ++ return &ffa_priv_data.features[desc_idx]; ++ ++ return NULL; ++} ++ ++/** ++ * ffa_get_rxtx_map_features - FFA_FEATURES handler function with FFA_RXTX_MAP ++ * argument ++ * ++ * This is the boot time function that implements FFA_FEATURES FF-A function ++ * to retrieve the FFA_RXTX_MAP features ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_get_rxtx_map_features(void) ++{ ++ FFA_DECLARE_ARGS; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!ffa_priv_data.invoke_ffa_fn) ++ panic("[FFA] no private data found\n"); ++ ++ a0 = FFA_FEATURES; ++ a1 = FFA_RXTX_MAP; ++ ++ ffa_priv_data.invoke_ffa_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res); ++ ++ switch (res.a0) { ++ case FFA_ERROR: ++ { ++ if (((int)res.a2) == FFA_ERR_STAT_NOT_SUPPORTED) { ++ ffa_err("FFA_RXTX_MAP is not implemented at this FF-A instance"); ++ return -EOPNOTSUPP; ++ } ++ ++ ffa_err("Undefined error code (%d)", ((int)res.a2)); ++ return -EINVAL; ++ } ++ case FFA_SUCCESS: ++ { ++ u32 desc_idx; ++ ++ /* ++ * search for an empty descriptor ++ */ ++ for (desc_idx = 0; desc_idx < FFA_FEATURE_DESC_CNT ; desc_idx++) ++ if (!ffa_priv_data.features[desc_idx].func_id) { ++ /* ++ * populate the descriptor with ++ * the interface features data ++ */ ++ ffa_priv_data.features[desc_idx].func_id = ++ FFA_RXTX_MAP; ++ ffa_priv_data.features[desc_idx].field1 = ++ res.a2; ++ ++ ffa_info("FFA_RXTX_MAP features data 0x%lx", ++ res.a2); ++ ++ return FFA_ERR_STAT_SUCCESS; ++ } ++ ++ ffa_err("Cannot save FFA_RXTX_MAP features data. Descriptors table full"); ++ return -ENOBUFS; ++ } ++ default: ++ { ++ ffa_err("Undefined response function (0x%lx)", ++ res.a0); ++ return -EINVAL; ++ } ++ } ++} ++ ++/** ++ * ffa_get_rxtx_buffers_pages_cnt - reads from the features data descriptors ++ * the minimum number of pages in each of the RX/TX ++ * buffers ++ * @buf_4k_pages: Pointer to the minimum number of pages ++ * ++ * This is the boot time function that returns the minimum number of pages ++ * in each of the RX/TX buffers ++ * ++ * Return: ++ * ++ * buf_4k_pages points to the returned number of pages ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_get_rxtx_buffers_pages_cnt(size_t *buf_4k_pages) ++{ ++ struct ffa_features_desc *desc = NULL; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!buf_4k_pages) ++ return -EINVAL; ++ ++ desc = ffa_get_features_desc(FFA_RXTX_MAP); ++ if (!desc) ++ return -EINVAL; ++ ++ ffa_dbg("FFA_RXTX_MAP descriptor found"); ++ ++ switch (desc->field1) { ++ case RXTX_4K: ++ *buf_4k_pages = 1; ++ break; ++ case RXTX_16K: ++ *buf_4k_pages = 4; ++ break; ++ case RXTX_64K: ++ *buf_4k_pages = 16; ++ break; ++ default: ++ ffa_err("RX/TX buffer size not supported"); ++ return -EINVAL; ++ } ++ ++ return FFA_ERR_STAT_SUCCESS; ++} ++ ++/** ++ * ffa_free_rxtx_buffers - frees the RX/TX buffers ++ * @buf_4k_pages: the minimum number of pages in each of the RX/TX ++ * buffers ++ * ++ * This is the boot time function used to free the RX/TX buffers ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_free_rxtx_buffers(size_t buf_4k_pages) ++{ ++ efi_status_t free_rxbuf_ret, free_txbuf_ret; ++ ++ ffa_info("Freeing RX/TX buffers"); ++ ++ free_rxbuf_ret = efi_free_pages(ffa_priv_data.pair.rxbuf, buf_4k_pages); ++ free_txbuf_ret = efi_free_pages(ffa_priv_data.pair.txbuf, buf_4k_pages); ++ ++ if (free_rxbuf_ret != EFI_SUCCESS || free_txbuf_ret != EFI_SUCCESS) { ++ ffa_err("Failed to free RX/TX buffers (rx: %lu , tx: %lu)", ++ free_rxbuf_ret, ++ free_txbuf_ret); ++ return -EINVAL; ++ } ++ ++ return FFA_ERR_STAT_SUCCESS; ++} ++ ++/** ++ * ffa_alloc_rxtx_buffers - allocates the RX/TX buffers ++ * @buf_4k_pages: the minimum number of pages in each of the RX/TX ++ * buffers ++ * ++ * This is the boot time function used by ffa_map_rxtx_buffers to allocate ++ * the RX/TX buffers before mapping them ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_alloc_rxtx_buffers(size_t buf_4k_pages) ++{ ++ ffa_dbg("[%s]", __func__); ++ ++#if CONFIG_IS_ENABLED(EFI_LOADER) ++ ++ efi_status_t efi_ret; ++ void *virt_txbuf; ++ void *virt_rxbuf; ++ ++ ffa_info("Using %lu 4KB page(s) for RX/TX buffers size", ++ buf_4k_pages); ++ ++ efi_ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, ++ EFI_BOOT_SERVICES_DATA, ++ buf_4k_pages, ++ &ffa_priv_data.pair.rxbuf); ++ ++ if (efi_ret != EFI_SUCCESS) { ++ ffa_priv_data.pair.rxbuf = 0; ++ ffa_err("Failure to allocate RX buffer (EFI error: 0x%lx)", ++ efi_ret); ++ ++ return -ENOBUFS; ++ } ++ ++ ffa_info("RX buffer at phys 0x%llx", ++ ffa_priv_data.pair.rxbuf); ++ ++ /* ++ * convert the RX buffer physical address to virtual address ++ */ ++ virt_rxbuf = (void *)map_sysmem((phys_addr_t)ffa_priv_data.pair.rxbuf, 0); ++ ++ /* ++ * make sure the buffer is clean before use ++ */ ++ memset(virt_rxbuf, 0, buf_4k_pages * SZ_4K); ++ ++ unmap_sysmem(virt_rxbuf); ++ ++ efi_ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, ++ EFI_RUNTIME_SERVICES_DATA, ++ buf_4k_pages, ++ &ffa_priv_data.pair.txbuf); ++ ++ if (efi_ret != EFI_SUCCESS) { ++ ffa_dbg("FFA_RXTX_MAP: freeing RX buffer"); ++ efi_free_pages(ffa_priv_data.pair.rxbuf, buf_4k_pages); ++ ffa_priv_data.pair.rxbuf = 0; ++ ffa_priv_data.pair.txbuf = 0; ++ ffa_err("Failure to allocate the TX buffer (EFI error: 0x%lx)" ++ , efi_ret); ++ ++ return -ENOBUFS; ++ } ++ ++ ffa_info("TX buffer at phys 0x%llx", ++ ffa_priv_data.pair.txbuf); ++ ++ /* ++ * convert the TX buffer physical address to virtual address ++ */ ++ virt_txbuf = (void *)map_sysmem((phys_addr_t)ffa_priv_data.pair.txbuf, 0); ++ ++ /* ++ * make sure the buffer is clean before use ++ */ ++ memset(virt_txbuf, 0, buf_4k_pages * SZ_4K); ++ ++ unmap_sysmem(virt_txbuf); ++ ++ return FFA_ERR_STAT_SUCCESS; ++ ++#else ++ return -ENOBUFS; ++#endif ++} ++ ++/** ++ * ffa_map_rxtx_buffers - FFA_RXTX_MAP handler function ++ * @buf_4k_pages: the minimum number of pages in each of the RX/TX ++ * buffers ++ * ++ * This is the boot time function that implements FFA_RXTX_MAP FF-A function ++ * to map the RX/TX buffers ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_map_rxtx_buffers(size_t buf_4k_pages) ++{ ++ int ret; ++ ++ FFA_DECLARE_ARGS; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!ffa_priv_data.invoke_ffa_fn) ++ panic("[FFA] no private data found\n"); ++ ++ ret = ffa_alloc_rxtx_buffers(buf_4k_pages); ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ return ret; ++ ++ a0 = FFA_RXTX_MAP; ++ a1 = ffa_priv_data.pair.txbuf; ++ a2 = ffa_priv_data.pair.rxbuf; ++ a3 = buf_4k_pages; ++ ++ ffa_priv_data.invoke_ffa_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res); ++ ++ switch (res.a0) { ++ case FFA_ERROR: ++ { ++ switch (((int)res.a2)) { ++ case FFA_ERR_STAT_INVALID_PARAMETERS: ++ ffa_err("One or more fields in input parameters is incorrectly encoded"); ++ ret = -EPERM; ++ break; ++ case FFA_ERR_STAT_NO_MEMORY: ++ ffa_err("Not enough memory"); ++ ret = -ENOMEM; ++ break; ++ case FFA_ERR_STAT_DENIED: ++ ffa_err("Buffer pair already registered"); ++ ret = -EACCES; ++ break; ++ case FFA_ERR_STAT_NOT_SUPPORTED: ++ ffa_err("This function is not implemented at this FF-A instance"); ++ ret = -EOPNOTSUPP; ++ break; ++ default: ++ ffa_err("Undefined error (%d)", ++ ((int)res.a2)); ++ ret = -EINVAL; ++ } ++ break; ++ } ++ case FFA_SUCCESS: ++ ffa_info("RX/TX buffers mapped"); ++ return FFA_ERR_STAT_SUCCESS; ++ default: ++ ffa_err("Undefined response function (0x%lx)", ++ res.a0); ++ ret = -EINVAL; ++ } ++ ++ ffa_free_rxtx_buffers(buf_4k_pages); ++ ++ return ret; ++} ++ ++/** ++ * ffa_unmap_rxtx_buffers - FFA_RXTX_UNMAP handler function ++ * ++ * This is the boot time function that implements FFA_RXTX_UNMAP FF-A function ++ * to unmap the RX/TX buffers ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_unmap_rxtx_buffers(void) ++{ ++ FFA_DECLARE_ARGS; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!ffa_priv_data.invoke_ffa_fn) ++ panic("[FFA] no private data found\n"); ++ ++ a0 = FFA_RXTX_UNMAP; ++ a1 = PREP_SELF_ENDPOINT_ID(ffa_priv_data.id); ++ ++ ffa_priv_data.invoke_ffa_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res); ++ ++ switch (res.a0) { ++ case FFA_ERROR: ++ { ++ if (((int)res.a2) == FFA_ERR_STAT_NOT_SUPPORTED) ++ panic("[FFA] FFA_RXTX_UNMAP is not implemented at this FF-A instance\n"); ++ else if (((int)res.a2) == FFA_ERR_STAT_INVALID_PARAMETERS) ++ panic("[FFA] There is no buffer pair registered on behalf of the caller\n"); ++ else ++ panic("[FFA] Undefined error (%d)\n", ((int)res.a2)); ++ } ++ case FFA_SUCCESS: ++ { ++ size_t buf_4k_pages = 0; ++ int ret; ++ ++ ret = ffa_get_rxtx_buffers_pages_cnt(&buf_4k_pages); ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ panic("[FFA] RX/TX buffers unmapped but failure in getting pages count\n"); ++ ++ ret = ffa_free_rxtx_buffers(buf_4k_pages); ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ panic("[FFA] RX/TX buffers unmapped but failure in freeing the memory\n"); ++ ++ ffa_info("RX/TX buffers unmapped and memory freed"); ++ ++ return FFA_ERR_STAT_SUCCESS; ++ } ++ default: ++ panic("[FFA] Undefined response function (0x%lx)", res.a0); ++ } ++} ++ ++/** ++ * ffa_release_rx_buffer - FFA_RX_RELEASE handler function ++ * ++ * This is the boot time function that invokes FFA_RX_RELEASE FF-A function ++ * to release the ownership of the RX buffer ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_release_rx_buffer(void) ++{ ++ FFA_DECLARE_ARGS; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!ffa_priv_data.invoke_ffa_fn) ++ panic("[FFA] no private data found\n"); ++ ++ a0 = FFA_RX_RELEASE; ++ ++ ffa_priv_data.invoke_ffa_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res); ++ ++ switch (res.a0) { ++ case FFA_ERROR: ++ { ++ if (((int)res.a2) == FFA_ERR_STAT_NOT_SUPPORTED) ++ panic("[FFA] FFA_RX_RELEASE is not implemented at this FF-A instance\n"); ++ else if (((int)res.a2) == FFA_ERR_STAT_DENIED) ++ panic("[FFA] Caller did not have ownership of the RX buffer\n"); ++ else ++ panic("[FFA] Undefined error (%d)\n", ((int)res.a2)); ++ } ++ case FFA_SUCCESS: ++ ffa_info("RX buffer released"); ++ return FFA_ERR_STAT_SUCCESS; ++ ++ default: ++ panic("[FFA] Undefined response function (0x%lx)\n", res.a0); ++ } ++} ++ ++/** ++ * ffa_uuid_are_identical - checks whether two given UUIDs are identical ++ * @uuid1: first UUID ++ * @uuid2: second UUID ++ * ++ * This is a boot time function used by ffa_read_partitions_info to search ++ * for a UUID in the partitions descriptors table ++ * ++ * Return: ++ * ++ * 1 when UUIDs match. Otherwise, 0 ++ */ ++int ffa_uuid_are_identical(const union ffa_partition_uuid *uuid1, ++ const union ffa_partition_uuid *uuid2) ++{ ++ if (!uuid1 || !uuid2) ++ return 0; ++ ++ return (!memcmp(uuid1, uuid2, sizeof(union ffa_partition_uuid))); ++} ++ ++/** ++ * ffa_read_partitions_info - reads the data queried by FFA_PARTITION_INFO_GET ++ * and saves it in the private structure ++ * @count: The number of partitions queried ++ * @part_uuid: Pointer to the partition(s) UUID ++ * ++ * This is the boot time function that reads the partitions information ++ * returned by the FFA_PARTITION_INFO_GET and saves it in the private ++ * data structure. ++ * ++ * Return: ++ * ++ * The private data structure is updated with the partition(s) information ++ * FFA_ERR_STAT_SUCCESS is returned on success. Otherwise, failure ++ */ ++static int ffa_read_partitions_info(u32 count, union ffa_partition_uuid *part_uuid) ++{ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!count) { ++ ffa_err("No partition detected"); ++ return -ENODATA; ++ } ++ ++ ffa_info("Reading partitions data from the RX buffer"); ++ ++#if CONFIG_IS_ENABLED(EFI_LOADER) ++ ++ if (!part_uuid) { ++ /* ++ * querying information of all partitions ++ */ ++ u64 data_pages; ++ u64 data_bytes; ++ efi_status_t efi_ret; ++ size_t buf_4k_pages = 0; ++ u32 desc_idx; ++ struct ffa_partition_info *parts_info; ++ int ret; ++ ++ data_bytes = count * sizeof(struct ffa_partition_desc); ++ data_pages = efi_size_in_pages(data_bytes); ++ ++ /* ++ * get the RX buffer size in pages ++ */ ++ ret = ffa_get_rxtx_buffers_pages_cnt(&buf_4k_pages); ++ if (ret != FFA_ERR_STAT_SUCCESS) { ++ ffa_err("Can not get the RX buffer size (error %d)", ret); ++ return ret; ++ } ++ ++ if (data_pages > buf_4k_pages) { ++ ffa_err("Partitions data size exceeds the RX buffer size:"); ++ ffa_err(" Sizes in pages: data %llu , RX buffer %lu ", ++ data_pages, ++ buf_4k_pages); ++ ++ return -ENOMEM; ++ } ++ ++ efi_ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, ++ EFI_RUNTIME_SERVICES_DATA, ++ data_pages, ++ (u64 *)&ffa_priv_data.partitions.descs); ++ ++ if (efi_ret != EFI_SUCCESS) { ++ ffa_priv_data.partitions.descs = NULL; ++ ++ ffa_err("Cannot allocate partitions data buffer (EFI error 0x%lx)", ++ efi_ret); ++ ++ return -ENOBUFS; ++ } ++ ++ /* ++ * convert the descs buffer physical address ++ * to virtual address ++ * This virtual address should not be unmapped ++ * descs is expected to be a virtual address ++ */ ++ ffa_priv_data.partitions.descs = ++ (struct ffa_partition_desc *) ++ map_sysmem((phys_addr_t) ++ ffa_priv_data.partitions.descs, 0); ++ ++ /* ++ * make sure the buffer is clean before use ++ */ ++ memset(ffa_priv_data.partitions.descs, 0, ++ data_pages * SZ_4K); ++ ++ ffa_info("Copying %lld page(s) of partitions data from RX buffer", ++ data_pages); ++ ++ /* ++ * convert the RX buffer physical address to ++ * virtual address ++ */ ++ parts_info = (struct ffa_partition_info *) ++ map_sysmem((phys_addr_t) ++ ffa_priv_data.pair.rxbuf, 0); ++ ++ for (desc_idx = 0 ; desc_idx < count ; desc_idx++) { ++ ffa_priv_data.partitions.descs[desc_idx].info = ++ parts_info[desc_idx]; ++ ++ ffa_info("Partition ID %x : info cached", ++ ffa_priv_data.partitions.descs[desc_idx].info.id); ++ } ++ unmap_sysmem(parts_info); ++ ++ ffa_priv_data.partitions.count = count; ++ ++ ffa_info("%d partition(s) found and cached", count); ++ ++ } else { ++ u32 rx_desc_idx, cached_desc_idx; ++ struct ffa_partition_info *parts_info; ++ u8 desc_found; ++ ++ /* ++ * convert the RX buffer physical address to virtual address ++ */ ++ parts_info = (struct ffa_partition_info *) ++ map_sysmem((phys_addr_t)ffa_priv_data.pair.rxbuf, 0); ++ ++ /* ++ * search for the SP IDs read from the RX buffer ++ * in the already cached SPs. ++ * Update the UUID when ID found. ++ */ ++ for (rx_desc_idx = 0; rx_desc_idx < count ; rx_desc_idx++) { ++ desc_found = 0; ++ ++ /* ++ * search the current ID in the cached partitions ++ */ ++ for (cached_desc_idx = 0; ++ cached_desc_idx < ffa_priv_data.partitions.count; ++ cached_desc_idx++) { ++ /* ++ * save the UUID ++ */ ++ if (ffa_priv_data.partitions.descs[cached_desc_idx].info.id == ++ parts_info[rx_desc_idx].id) { ++ ffa_priv_data.partitions.descs[cached_desc_idx].UUID = ++ *part_uuid; ++ ++ desc_found = 1; ++ break; ++ } ++ } ++ ++ if (!desc_found) { ++ unmap_sysmem(parts_info); ++ return -ENODATA; ++ } ++ } ++ unmap_sysmem(parts_info); ++ } ++#else ++#warning "arm_ffa: reading FFA_PARTITION_INFO_GET data not implemented" ++#endif ++ ++ return FFA_ERR_STAT_SUCCESS; ++} ++ ++/** ++ * ffa_query_partitions_info - invokes FFA_PARTITION_INFO_GET ++ * and saves partitions data ++ * @part_uuid: Pointer to the partition(s) UUID ++ * @pcount: Pointer to the number of partitions variable filled when querying ++ * ++ * This is the boot time function that executes the FFA_PARTITION_INFO_GET ++ * to query the partitions data. Then, it calls ffa_read_partitions_info ++ * to save the data in the private data structure. ++ * ++ * After reading the data the RX buffer is released using ffa_release_rx_buffer ++ * ++ * Return: ++ * ++ * When part_uuid is NULL, all partitions data are retrieved from secure world ++ * When part_uuid is non NULL, data for partitions matching the given UUID are ++ * retrieved and the number of partitions is returned ++ * FFA_ERR_STAT_SUCCESS is returned on success. Otherwise, failure ++ */ ++static int ffa_query_partitions_info(union ffa_partition_uuid *part_uuid, ++ u32 *pcount) ++{ ++ unsigned long a0 = 0; ++ union ffa_partition_uuid query_uuid = {0}; ++ unsigned long a5 = 0; ++ unsigned long a6 = 0; ++ unsigned long a7 = 0; ++ struct arm_smccc_res res = {0}; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!ffa_priv_data.invoke_ffa_fn) ++ panic("[FFA] no private data found\n"); ++ ++ a0 = FFA_PARTITION_INFO_GET; ++ ++ /* ++ * If a UUID is specified. Information for one or more ++ * partitions in the system is queried. Otherwise, information ++ * for all installed partitions is queried ++ */ ++ ++ if (part_uuid) { ++ if (!pcount) ++ return -EINVAL; ++ ++ query_uuid = *part_uuid; ++ } ++ ++ ffa_priv_data.invoke_ffa_fn(a0, query_uuid.words.a1, query_uuid.words.a2, ++ query_uuid.words.a3, query_uuid.words.a4, ++ a5, a6, a7, &res); ++ ++ switch (res.a0) { ++ case FFA_ERROR: ++ { ++ switch (((int)res.a2)) { ++ case FFA_ERR_STAT_INVALID_PARAMETERS: ++ ffa_err("Unrecognized UUID"); ++ return -EPERM; ++ case FFA_ERR_STAT_NO_MEMORY: ++ ffa_err("Results cannot fit in RX buffer of the caller"); ++ return -ENOMEM; ++ case FFA_ERR_STAT_DENIED: ++ ffa_err("Callee is not in a state to handle this request"); ++ return -EACCES; ++ case FFA_ERR_STAT_NOT_SUPPORTED: ++ ffa_err("This function is not implemented at this FF-A instance"); ++ return -EOPNOTSUPP; ++ case FFA_ERR_STAT_BUSY: ++ ffa_err("RX buffer of the caller is not free"); ++ return -EBUSY; ++ default: ++ ffa_err("Undefined error (%d)", ((int)res.a2)); ++ return -EINVAL; ++ } ++ } ++ case FFA_SUCCESS: ++ { ++ int ret; ++ ++ /* ++ * res.a2 contains the count of partition information descriptors ++ * populated in the RX buffer ++ */ ++ if (res.a2) { ++ ret = ffa_read_partitions_info(res.a2, part_uuid); ++ if (ret) ++ ffa_err("Failed to read partition(s) data , error (%d)", ret); ++ } ++ ++ /* ++ * return the SP count ++ */ ++ if (part_uuid) { ++ if (!ret) ++ *pcount = res.a2; ++ else ++ *pcount = 0; ++ } ++ /* ++ * After calling FFA_PARTITION_INFO_GET the buffer ownership ++ * is assigned to the consumer (u-boot). So, we need to give ++ * the ownership back to the secure world ++ */ ++ ret = ffa_release_rx_buffer(); ++ ++ if (!part_uuid && !res.a2) { ++ ffa_err("[FFA] no partition installed in the system"); ++ return -ENODEV; ++ } ++ ++ return ret; ++ } ++ default: ++ ffa_err("Undefined response function (0x%lx)", res.a0); ++ return -EINVAL; ++ } ++} ++ ++/** ++ * ffa_get_partitions_info - FFA_PARTITION_INFO_GET handler function ++ * @func_data: Pointer to the FF-A function arguments container structure. ++ * The passed arguments: ++ * Mode 1: When getting from the driver the number of ++ * secure partitions: ++ * @data0_size: UUID size ++ * @data0: pointer to the UUID (little endian) ++ * @data1_size: size of the number of partitions ++ * variable ++ * @data1: pointer to the number of partitions ++ * variable. The variable will be set ++ * by the driver ++ * Mode 2: When requesting the driver to return the ++ * partitions information: ++ * @data0_size: UUID size ++ * @data0: pointer to the UUID (little endian) ++ * @data1_size: size of the SPs information buffer ++ * @data1: pointer to SPs information buffer ++ * (allocated by the client). ++ * The buffer will be filled by the driver ++ * ++ * This is the boot time function that queries the secure partition data from ++ * the private data structure. If not found, it invokes FFA_PARTITION_INFO_GET ++ * FF-A function to query the partition information from secure world. ++ * ++ * A client of the FF-A driver should know the UUID of the service it wants to ++ * access. It should use the UUID to request the FF-A driver to provide the ++ * partition(s) information of the service. The FF-A driver uses ++ * PARTITION_INFO_GET to obtain this information. This is implemented through ++ * ffa_get_partitions_info function. ++ * A new FFA_PARTITION_INFO_GET call is issued (first one performed through ++ * ffa_cache_partitions_info) allowing to retrieve the partition(s) information. ++ * They are not saved (already done). We only update the UUID in the cached area. ++ * This assumes that partitions data does not change in the secure world. ++ * Otherwise u-boot will have an outdated partition data. The benefit of caching ++ * the information in the FF-A driver is to accommodate discovery after ++ * ExitBootServices(). ++ * ++ * When invoked through a client request, ffa_get_partitions_info should be ++ * called twice. First call is to get from the driver the number of secure ++ * partitions (SPs) associated to a particular UUID. ++ * Then, the caller (client) allocates the buffer to host the SPs data and ++ * issues a 2nd call. Then, the driver fills the SPs data in the pre-allocated ++ * buffer. ++ * ++ * To achieve the mechanism described above, ffa_get_partitions_info uses the ++ * following functions: ++ * ffa_read_partitions_info ++ * ffa_query_partitions_info ++ * ++ * Return: ++ * ++ * @data1: When pointing to the number of partitions variable, the number is ++ * set by the driver. ++ * When pointing to the partitions information buffer, the buffer will be ++ * filled by the driver. ++ * ++ * On success FFA_ERR_STAT_SUCCESS is returned. Otherwise, failure ++ */ ++static int ffa_get_partitions_info(struct ffa_interface_data *func_data) ++{ ++ /* ++ * fill_data: ++ * 0: return the SP count ++ * 1: fill SP data and return it to the caller ++ * -1: undefined mode ++ */ ++ int fill_data = -1; ++ u32 desc_idx, client_desc_idx; ++ union ffa_partition_uuid *part_uuid; ++ u32 client_desc_max_cnt; ++ u32 parts_found = 0; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!func_data) { ++ ffa_err("No function data provided"); ++ return -EINVAL; ++ } ++ ++ if (!ffa_priv_data.partitions.count || !ffa_priv_data.partitions.descs) ++ panic("[FFA] No partition installed\n"); ++ ++ if (func_data->data0_size == sizeof(union ffa_partition_uuid) && ++ func_data->data0 && ++ func_data->data1_size == sizeof(u32) && ++ func_data->data1) { ++ /* ++ * data0 (in): pointer to UUID ++ * data1 (in): pointer to SP count ++ * Out: SP count returned in the count variable pointed by data1 ++ */ ++ ++ fill_data = 0; ++ ++ ffa_info("Preparing for checking partitions count"); ++ ++ } else if ((func_data->data0_size == sizeof(union ffa_partition_uuid)) && ++ func_data->data0 && ++ (func_data->data1_size >= sizeof(struct ffa_partition_info)) && ++ !(func_data->data1_size % sizeof(struct ffa_partition_info)) && ++ func_data->data1) { ++ /* ++ * data0 (in): pointer to UUID ++ * data1 (in): pointer to SPs descriptors buffer ++ * (created by the client) ++ * Out: SPs descriptors returned in the buffer ++ * pointed by data1 ++ */ ++ ++ fill_data = 1; ++ ++ client_desc_idx = 0; ++ ++ /* ++ * number of empty descriptors preallocated by the caller ++ */ ++ client_desc_max_cnt = ++ func_data->data1_size / sizeof(struct ffa_partition_info); ++ ++ ffa_info("Preparing for filling partitions info"); ++ ++ } else { ++ ffa_err("Invalid function arguments provided"); ++ return -EINVAL; ++ } ++ ++ part_uuid = (union ffa_partition_uuid *)func_data->data0; ++ ++ ffa_info("Searching partitions using the provided UUID"); ++ ++#ifdef DEBUG ++ { ++ u32 dbg_uuid_cnt; ++ ++ ffa_dbg("UUID: [LSB]"); ++ ++ for (dbg_uuid_cnt = 0 ; dbg_uuid_cnt < UUID_SIZE ; dbg_uuid_cnt++) ++ ffa_dbg(" %02x", part_uuid->bytes[dbg_uuid_cnt]); ++ } ++#endif ++ ++ /* ++ * search in the cached partitions ++ */ ++ for (desc_idx = 0; ++ desc_idx < ffa_priv_data.partitions.count; ++ desc_idx++) { ++ if (ffa_uuid_are_identical(&ffa_priv_data.partitions.descs[desc_idx].UUID, ++ part_uuid)) { ++ ffa_info("Partition ID %x matches the provided UUID", ++ ffa_priv_data.partitions.descs[desc_idx].info.id); ++ ++ parts_found++; ++ ++ if (fill_data) { ++ /* ++ * trying to fill the partition info in data1 ++ */ ++ ++ if (client_desc_idx < client_desc_max_cnt) { ++ ((struct ffa_partition_info *) ++ func_data->data1)[client_desc_idx++] = ++ ffa_priv_data.partitions.descs[desc_idx].info; ++ continue; ++ } ++ ++ ffa_err("Failed to fill the current descriptor client buffer full"); ++ return -ENOBUFS; ++ } ++ } ++ } ++ ++ if (!parts_found) { ++ int ret; ++ ++ ffa_info("No partition found. Querying framework ..."); ++ ++ ret = ffa_query_partitions_info(part_uuid, &parts_found); ++ ++ if (ret == FFA_ERR_STAT_SUCCESS) { ++ if (!fill_data) { ++ *((u32 *)func_data->data1) = parts_found; ++ ++ ffa_info("Number of partition(s) found matching the UUID: %d", ++ parts_found); ++ } else { ++ /* ++ * we want to read SPs info ++ */ ++ ++ /* ++ * If SPs data filled, retry searching SP info again ++ */ ++ if (parts_found) ++ ret = ffa_get_partitions_info(func_data); ++ else ++ ret = -ENODATA; ++ } ++ } ++ ++ return ret; ++ } ++ ++ /* partition(s) found */ ++ if (!fill_data) ++ *((u32 *)func_data->data1) = parts_found; ++ ++ return FFA_ERR_STAT_SUCCESS; ++} ++ ++/** ++ * ffa_cache_partitions_info - Queries and saves all secure partitions data ++ * ++ * This is a boot time function that invokes FFA_PARTITION_INFO_GET FF-A ++ * function to query from secure world all partitions information. ++ * ++ * The FFA_PARTITION_INFO_GET call is issued with nil UUID as an argument. ++ * All installed partitions information are returned. We cache them in the ++ * resident private data structure and we keep the UUID field empty ++ * (in FF-A 1.0 UUID is not provided by the partition descriptor) ++ * ++ * This function is called at the device probing level. ++ * ffa_cache_partitions_info uses ffa_query_partitions_info to get the data ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_cache_partitions_info(void) ++{ ++ ffa_dbg("[%s]", __func__); ++ return ffa_query_partitions_info(NULL, NULL); ++} ++ ++/** ++ * ffa_msg_send_direct_req - FFA_MSG_SEND_DIRECT_{REQ,RESP} handler function ++ * @func_data: Pointer to the FF-A function arguments container structure. ++ * The passed arguments: ++ * @data0_size: partition ID size ++ * @data0: pointer to the partition ID ++ * @data1_size: exchanged data size ++ * @data1: pointer to the data buffer preallocated by ++ * the client (in/out) ++ * ++ * This is the runtime function that implements FFA_MSG_SEND_DIRECT_{REQ,RESP} ++ * FF-A functions. ++ * ++ * FFA_MSG_SEND_DIRECT_REQ is used to send the data to the secure partition. ++ * The response from the secure partition is handled by reading the ++ * FFA_MSG_SEND_DIRECT_RESP arguments. ++ * ++ * The maximum size of the data that can be exchanged is 20 bytes which is ++ * sizeof(struct ffa_send_direct_data) as defined by the FF-A specification 1.0 ++ * in the section relevant to FFA_MSG_SEND_DIRECT_{REQ,RESP} ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int __ffa_runtime ffa_msg_send_direct_req(struct ffa_interface_data ++ *func_data) ++{ ++ u16 dst_part_id; ++ unsigned long a0 = 0; ++ unsigned long a1 = 0; ++ unsigned long a2 = 0; ++ struct ffa_send_direct_data *msg; ++ struct arm_smccc_res res = {0}; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ if (!ffa_priv_data.invoke_ffa_fn) ++ panic("[FFA] no private data found\n"); ++ ++ if (!func_data) ++ return -EINVAL; ++ ++ if (!ffa_priv_data.partitions.count || !ffa_priv_data.partitions.descs) ++ panic("[FFA] no partition installed\n"); ++ ++ if (func_data->data0_size != sizeof(u16) || ++ !func_data->data0 || ++ func_data->data1_size != FFA_MSG_SEND_DIRECT_MAX_SIZE || ++ !func_data->data1) { ++ ffa_err("Undefined interface parameters"); ++ return -EINVAL; ++ } ++ ++ dst_part_id = *((u16 *)func_data->data0); ++ msg = func_data->data1; ++ ++ ffa_dbg("Sending data to partition ID 0x%x", dst_part_id); ++ ++ a0 = FFA_MSG_SEND_DIRECT_REQ; ++ ++ a1 = PREP_SELF_ENDPOINT_ID(ffa_priv_data.id) | ++ PREP_PART_ENDPOINT_ID(dst_part_id); ++ ++ ffa_priv_data.invoke_ffa_fn(a0, a1, a2, ++ msg->a3, ++ msg->a4, ++ msg->a5, ++ msg->a6, ++ msg->a7, ++ &res); ++ ++ while (res.a0 == FFA_INTERRUPT) ++ ffa_priv_data.invoke_ffa_fn(FFA_RUN, res.a1, ++ 0, 0, 0, 0, 0, 0, ++ &res); ++ ++ switch (res.a0) { ++ case FFA_ERROR: ++ { ++ switch (((int)res.a2)) { ++ case FFA_ERR_STAT_INVALID_PARAMETERS: ++ ffa_err("Invalid endpoint ID or non-zero reserved register"); ++ return -EPERM; ++ case FFA_ERR_STAT_ABORTED: ++ panic("[FFA] Message target ran into unexpected error and has aborted\n"); ++ case FFA_ERR_STAT_DENIED: ++ panic("[FFA] Callee is not in a state to handle this request\n"); ++ case FFA_ERR_STAT_NOT_SUPPORTED: ++ panic("[FFA] This function is not implemented at this FF-A instance\n"); ++ case FFA_ERR_STAT_BUSY: ++ panic("[FFA] Message target is busy\n"); ++ default: ++ panic("[FFA] Undefined error (%d)\n", ((int)res.a2)); ++ } ++ } ++ case FFA_SUCCESS: ++ ++ ffa_dbg("Message sent with no response"); ++ return FFA_ERR_STAT_SUCCESS; ++ ++ case FFA_MSG_SEND_DIRECT_RESP: ++ ++ ffa_dbg("Message sent with response"); ++ ++ /* ++ * extract the 32-bit wide return data ++ */ ++ msg->a3 = (u32)res.a3; ++ msg->a4 = (u32)res.a4; ++ msg->a5 = (u32)res.a5; ++ msg->a6 = (u32)res.a6; ++ msg->a7 = (u32)res.a7; ++ ++ return FFA_ERR_STAT_SUCCESS; ++ ++ default: ++ panic("[FFA] Undefined response function (0x%lx)\n", res.a0); ++ } ++} ++ ++/** ++ * invoke_ffa_drv_api - The driver dispatcher function ++ * @func_id: The FF-A function to be used ++ * @func_data: Pointer to the FF-A function arguments container ++ * structure. This also includes pointers to the ++ * returned data needed by clients. ++ * The dispatcher is a runtime function that selects the FF-A function handler ++ * based on the input FF-A function ID. ++ * The input arguments are passed to the handler function. ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++int __ffa_runtime invoke_ffa_drv_api(u32 func_id, ++ struct ffa_interface_data *func_data) ++{ ++ if (!ffa_priv_data.dev) ++ panic("[FFA] no device found\n"); ++ ++ switch (func_id) { ++ case FFA_PARTITION_INFO_GET: ++ return ffa_get_partitions_info(func_data); ++ case FFA_RXTX_UNMAP: ++ return ffa_unmap_rxtx_buffers(); ++ case FFA_MSG_SEND_DIRECT_REQ: ++ return ffa_msg_send_direct_req(func_data); ++ default: ++ ++ ffa_err("Undefined FF-A interface (%d)", func_id); ++ ++ return -EINVAL; ++ } ++} ++ ++/** ++ * ffa_init_private_data - Initialization of the private data ++ * @dev: the arm_ffa device ++ * ++ * This boot time function reads data from the platform data structure ++ * and populates the private data structure ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_init_private_data(struct udevice *dev) ++{ ++ struct ffa_pdata *pdata = dev_get_plat(dev); ++ ++ ffa_priv_data.conduit = pdata->conduit; ++ ++ if (ffa_priv_data.conduit == FFA_CONDUIT_SMC) { ++ ffa_priv_data.invoke_ffa_fn = arm_ffa_smccc_smc; ++ } else { ++ ffa_err("Undefined FF-A conduit (%d)", ffa_priv_data.conduit); ++ return -EINVAL; ++ } ++ ++ ffa_info("Conduit is %s", ++ ((ffa_priv_data.conduit == FFA_CONDUIT_SMC) ? ++ "SMC" : "NOT SUPPORTED")); ++ ++ return FFA_ERR_STAT_SUCCESS; ++} ++ ++/** ++ * ffa_probe - The driver probe function ++ * @dev: the arm_ffa device ++ * ++ * Probing is done at boot time and triggered by the uclass device discovery. ++ * At probe level the following actions are done: ++ * - initialization of the driver private data structure ++ * - querying from secure world the FF-A framework version ++ * - querying from secure world the u-boot endpoint ID ++ * - querying from secure world the supported features of the specified FF-A calls ++ * - mapping the RX/TX buffers ++ * - querying from secure world all the partitions information ++ * ++ * All data queried from secure world is saved in the resident private data structure. ++ * ++ * The probe will fail if either FF-A framework is not detected or the ++ * FF-A requests are not behaving correctly. This ensures that the ++ * driver is not installed and its operations are not exported to the clients. ++ * However, once the driver is successfully probed and an FF-A anomaly is ++ * detected when clients invoke the driver operations, the driver cause ++ * u-boot to panic because the client would not know what to do in such conditions. ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_probe(struct udevice *dev) ++{ ++ int ret; ++ size_t buf_4k_pages = 0; ++ ++ ffa_dbg("[%s]: initializing the FF-A driver", __func__); ++ ++ ret = ffa_init_private_data(dev); ++ ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ return ret; ++ ++ ret = ffa_get_version(); ++ ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ return ret; ++ ++ ret = ffa_get_endpoint_id(); ++ ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ return ret; ++ ++ ret = ffa_get_rxtx_map_features(); ++ ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ return ret; ++ ++ ret = ffa_get_rxtx_buffers_pages_cnt(&buf_4k_pages); ++ ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ return ret; ++ ++ ret = ffa_map_rxtx_buffers(buf_4k_pages); ++ ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ return ret; ++ ++ ret = ffa_cache_partitions_info(); ++ ++ if (ret != FFA_ERR_STAT_SUCCESS) { ++ ffa_free_rxtx_buffers(buf_4k_pages); ++ return ret; ++ } ++ ++ ffa_dbg("[%s]: initialization done", __func__); ++ ++ return FFA_ERR_STAT_SUCCESS; ++} ++ ++/** ++ * ffa_of_to_plat - Reads the device tree node ++ * @dev: the arm_ffa device ++ * ++ * This boot time function reads data from the device tree node and populates ++ * the platform data structure ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++static int ffa_of_to_plat(struct udevice *dev) ++{ ++ struct ffa_pdata *pdata = dev_get_plat(dev); ++ const char *conduit; ++ ++ ffa_dbg("[%s]", __func__); ++ ++ conduit = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "method", NULL); ++ ++ if (strcmp("smc", conduit)) { ++ ffa_err("Unsupported conduit"); ++ return -EINVAL; ++ } ++ ++ pdata->conduit = FFA_CONDUIT_SMC; ++ ++ return FFA_ERR_STAT_SUCCESS; ++} ++ ++/** ++ * ffa_drv_ops - The driver operations runtime structure ++ * @invoke_func: The driver dispatcher ++ */ ++struct ffa_ops __ffa_runtime_data ffa_drv_ops = { ++ .invoke_func = invoke_ffa_drv_api ++}; ++ ++/** ++ * ffa_device_get_ops - driver operations getter ++ * ++ * Return: ++ * This runtime function returns a pointer to the driver operations structure ++ */ ++const struct ffa_ops * __ffa_runtime ffa_device_get_ops(void) ++{ ++ return &ffa_drv_ops; ++} ++ ++/** ++ * Defining the device tree compatible string ++ */ ++ ++static const struct udevice_id ffa_match_id[] = { ++ {"arm,ffa", 0}, ++ {}, ++}; ++ ++/** ++ * Declaring the arm_ffa driver under UCLASS_FFA ++ */ ++ ++U_BOOT_DRIVER(arm_ffa) = { ++ .name = "arm_ffa", ++ .of_match = ffa_match_id, ++ .id = UCLASS_FFA, ++ .of_to_plat = ffa_of_to_plat, ++ .probe = ffa_probe, ++ .plat_auto = sizeof(struct ffa_pdata), ++}; +diff --git a/include/arm_ffa.h b/include/arm_ffa.h +new file mode 100644 +index 0000000000..313f46f747 +--- /dev/null ++++ b/include/arm_ffa.h +@@ -0,0 +1,191 @@ ++/* SPDX-License-Identifier: GPL-2.0+ */ ++/* ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#ifndef __ARM_FFA_H ++#define __ARM_FFA_H ++ ++#include <linux/arm-smccc.h> ++#include <linux/printk.h> ++ ++/* ++ * This header is public. It can be used by clients to access ++ * data structures and definitions they need ++ */ ++ ++/* ++ * Macros for displaying logs ++ */ ++ ++#define ffa_dbg(fmt, ...) pr_debug("[FFA] " fmt "\n", ##__VA_ARGS__) ++#define ffa_info(fmt, ...) pr_info("[FFA] " fmt "\n", ##__VA_ARGS__) ++#define ffa_err(fmt, ...) pr_err("[FFA] " fmt "\n", ##__VA_ARGS__) ++ ++/* ++ * The driver operations success error code ++ */ ++#define FFA_ERR_STAT_SUCCESS (0) ++ ++#if CONFIG_IS_ENABLED(EFI_LOADER) ++ ++#include <efi_loader.h> ++ ++/* ++ * __ffa_runtime_data and __ffa_runtime - controls whether data/code are ++ * available after calling the EFI ExitBootServices service. ++ * Data/code tagged with these keywords are resident (available at boot time and ++ * at runtime) ++ */ ++ ++#define __ffa_runtime_data __efi_runtime_data ++#define __ffa_runtime __efi_runtime ++ ++#else ++ ++#define __ffa_runtime_data ++#define __ffa_runtime ++ ++#endif ++ ++/* ++ * Definitions of the Arm FF-A interfaces supported by the Arm FF-A driver ++ */ ++ ++#define FFA_SMC(calling_convention, func_num) \ ++ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, (calling_convention), \ ++ ARM_SMCCC_OWNER_STANDARD, (func_num)) ++ ++#define FFA_SMC_32(func_num) FFA_SMC(ARM_SMCCC_SMC_32, (func_num)) ++ ++#define FFA_VERSION FFA_SMC_32(0x63) ++#define FFA_ID_GET FFA_SMC_32(0x69) ++#define FFA_FEATURES FFA_SMC_32(0x64) ++#define FFA_PARTITION_INFO_GET FFA_SMC_32(0x68) ++#define FFA_RXTX_MAP FFA_SMC_32(0x66) ++#define FFA_RXTX_UNMAP FFA_SMC_32(0x67) ++#define FFA_RX_RELEASE FFA_SMC_32(0x65) ++#define FFA_MSG_SEND_DIRECT_REQ FFA_SMC_32(0x6F) ++#define FFA_MSG_SEND_DIRECT_RESP FFA_SMC_32(0x70) ++#define FFA_RUN FFA_SMC_32(0x6D) ++#define FFA_ERROR FFA_SMC_32(0x60) ++#define FFA_SUCCESS FFA_SMC_32(0x61) ++#define FFA_INTERRUPT FFA_SMC_32(0x62) ++ ++/* ++ * struct ffa_partition_info - Partition information descriptor ++ * @id: Partition ID ++ * @exec_ctxt: Execution context count ++ * @properties: Partition properties ++ * ++ * Data structure containing information about partitions instantiated in the system ++ * This structure is filled with the data queried by FFA_PARTITION_INFO_GET ++ */ ++struct __packed ffa_partition_info { ++ u16 id; ++ u16 exec_ctxt; ++/* partition supports receipt of direct requests */ ++#define FFA_PARTITION_DIRECT_RECV BIT(0) ++/* partition can send direct requests. */ ++#define FFA_PARTITION_DIRECT_SEND BIT(1) ++/* partition can send and receive indirect messages. */ ++#define FFA_PARTITION_INDIRECT_MSG BIT(2) ++ u32 properties; ++}; ++ ++/* ++ * struct ffa_send_direct_data - Data structure hosting the data ++ * used by FFA_MSG_SEND_DIRECT_{REQ,RESP} ++ * @a3-a7: Data read/written from/to w3-w7 registers ++ * ++ * Data structure containing the data to be sent by FFA_MSG_SEND_DIRECT_REQ ++ * or read from FFA_MSG_SEND_DIRECT_RESP ++ */ ++struct __packed ffa_send_direct_data { ++ u32 a3; /* w3 */ ++ u32 a4; /* w4 */ ++ u32 a5; /* w5 */ ++ u32 a6; /* w6 */ ++ u32 a7; /* w7 */ ++}; ++ ++#define FFA_MSG_SEND_DIRECT_MAX_SIZE (sizeof(struct ffa_send_direct_data)) ++ ++/* UUID data size */ ++#define UUID_SIZE (16) ++ ++/* ++ * union ffa_partition_uuid - Data union hosting the UUID ++ * transmitted by FFA_PARTITION_INFO_GET ++ * @words: data structure giving 32-bit words access to the UUID data ++ * @bytes: data structure giving byte access to the UUID data ++ * ++ * The structure holds little-endian UUID data. ++ */ ++union ffa_partition_uuid { ++ struct __packed words { ++ u32 a1; /* w1 */ ++ u32 a2; /* w2 */ ++ u32 a3; /* w3 */ ++ u32 a4; /* w4 */ ++ } words; ++ u8 bytes[UUID_SIZE]; ++}; ++ ++/** ++ * struct ffa_interface_data - generic FF-A interface data structure used to exchange ++ * data between user layers and the driver ++ * @data0_size: size of the first argument ++ * @data0: pointer to the first argument ++ * @data1_size>: size of the second argument ++ * @data1: pointer to the second argument ++ * ++ * Using this structure user layers can pass various types of data with different sizes. ++ * The driver internal functions can detect the nature of this data, verfy compliance ++ * then execute the request when appropriate. ++ */ ++struct ffa_interface_data { ++ u32 data0_size; /* size of the first argument */ ++ void *data0; /* pointer to the first argument */ ++ u32 data1_size; /* size of the second argument */ ++ void *data1; /* pointer to the second argument */ ++}; ++ ++/** ++ * struct ffa_ops - The driver operations structure ++ * @invoke_func: function pointer to the invoke function ++ * ++ * The data structure providing all the operations supported by the driver. ++ * This structure is resident. ++ */ ++struct ffa_ops { ++ /* the driver dispatcher */ ++ int (*invoke_func)(u32 func_id, struct ffa_interface_data *func_data); ++}; ++ ++/** ++ * The device driver and the Uclass driver public functions ++ */ ++ ++/** ++ * ffa_get_invoke_func - performs a call to the FF-A driver dispatcher ++ */ ++int __ffa_runtime ffa_get_invoke_func(u32 func_id, ++ struct ffa_interface_data *func_data); ++ ++/** ++ * ffa_device_get_ops - driver operations getter ++ */ ++const struct ffa_ops * __ffa_runtime ffa_device_get_ops(void); ++ ++/** ++ * ffa_get_device - probes the arm_ffa device ++ */ ++int ffa_get_device(void); ++ ++/** ++ * ffa_init_device - probes the arm_ffa device ++ */ ++int ffa_init_device(void); ++#endif +diff --git a/include/arm_ffa_helper.h b/include/arm_ffa_helper.h +new file mode 100644 +index 0000000000..0e143e5451 +--- /dev/null ++++ b/include/arm_ffa_helper.h +@@ -0,0 +1,45 @@ ++/* SPDX-License-Identifier: GPL-2.0+ */ ++/* ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#ifndef __ARM_FFA_HELPER_H ++#define __ARM_FFA_HELPER_H ++ ++#include <arm_ffa.h> ++ ++/* ++ * This header is public. Including this header provides all data structures ++ * and definitions needed by clients to use the FF-A transport driver ++ * ++ * It also provides helper functions allowing to pass data and invoke FF-A functions ++ */ ++ ++/** ++ * ffa_helper_get_partitions_info - Wrapper function for FFA_PARTITION_INFO_GET ++ */ ++int ffa_helper_get_partitions_info(struct ffa_interface_data *func_data); ++ ++/** ++ * ffa_helper_unmap_rxtx_buffers - Wrapper function for FFA_RXTX_UNMAP ++ */ ++int ffa_helper_unmap_rxtx_buffers(void); ++ ++/** ++ * ffa_helper_msg_send_direct_req - Wrapper function for ++ * FFA_MSG_SEND_DIRECT_{REQ,RESP} ++ */ ++int __ffa_runtime ffa_helper_msg_send_direct_req(struct ffa_interface_data ++ *func_data); ++ ++/** ++ * ffa_helper_init_device - Wrapper function for probing the arm_ffa device ++ */ ++int ffa_helper_init_device(void); ++ ++/** ++ * ffa_uuid_str_to_bin - Converts a big endian UUID string to a little endian buffer ++ */ ++int ffa_uuid_str_to_bin(const char *uuid_str, unsigned char *uuid_bin); ++#endif +diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h +index e7edd409f3..fc7de08add 100644 +--- a/include/dm/uclass-id.h ++++ b/include/dm/uclass-id.h +@@ -51,6 +51,7 @@ enum uclass_id { + UCLASS_EFI, /* EFI managed devices */ + UCLASS_ETH, /* Ethernet device */ + UCLASS_ETH_PHY, /* Ethernet PHY device */ ++ UCLASS_FFA, /* Arm Firmware Framework for Armv8-A */ + UCLASS_FIRMWARE, /* Firmware */ + UCLASS_FS_FIRMWARE_LOADER, /* Generic loader */ + UCLASS_GPIO, /* Bank of general-purpose I/O pins */ +diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h +index 7f2be23394..54980a130f 100644 +--- a/include/linux/arm-smccc.h ++++ b/include/linux/arm-smccc.h +@@ -1,6 +1,8 @@ + /* SPDX-License-Identifier: GPL-2.0 */ + /* + * Copyright (c) 2015, Linaro Limited ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> + */ + #ifndef __LINUX_ARM_SMCCC_H + #define __LINUX_ARM_SMCCC_H +@@ -57,13 +59,17 @@ + #include <linux/types.h> + /** + * struct arm_smccc_res - Result from SMC/HVC call +- * @a0-a3 result values from registers 0 to 3 ++ * @a0-a7 result values from registers 0 to 7 + */ + struct arm_smccc_res { + unsigned long a0; + unsigned long a1; + unsigned long a2; + unsigned long a3; ++ unsigned long a4; ++ unsigned long a5; ++ unsigned long a6; ++ unsigned long a7; + }; + + /** +@@ -113,6 +119,26 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, + unsigned long a5, unsigned long a6, unsigned long a7, + struct arm_smccc_res *res, struct arm_smccc_quirk *quirk); + ++#if (IS_ENABLED(CONFIG_ARM_FFA_TRANSPORT)) ++/** ++ * __arm_ffa_smccc_smc() - make SMC calls used for FF-A transport ++ * @a0-a7: arguments passed in 64-bit registers x0 to x7 ++ * @res: result values from 64-bit registers x0 to x7 ++ * ++ * This function is used to make SMC calls following SMC32 Calling Convention. ++ * The content of the supplied parameters is copied to registers x0 to x7 prior ++ * to the SMC instruction. The SMC call return data is 32-bit data read from ++ * registers x0 tp x7. ++ */ ++asmlinkage void __arm_ffa_smccc_smc(unsigned long a0, unsigned long a1, ++ unsigned long a2, unsigned long a3, unsigned long a4, ++ unsigned long a5, unsigned long a6, unsigned long a7, ++ struct arm_smccc_res *res); ++ ++#define arm_ffa_smccc_smc __arm_ffa_smccc_smc ++ ++#endif ++ + #define arm_smccc_smc(...) __arm_smccc_smc(__VA_ARGS__, NULL) + + #define arm_smccc_smc_quirk(...) __arm_smccc_smc(__VA_ARGS__) +diff --git a/lib/Kconfig b/lib/Kconfig +index 130fa0630a..58d313cb13 100644 +--- a/lib/Kconfig ++++ b/lib/Kconfig +@@ -709,6 +709,7 @@ config SMBIOS_PARSER + source lib/efi/Kconfig + source lib/efi_loader/Kconfig + source lib/optee/Kconfig ++source lib/arm-ffa/Kconfig + + config TEST_FDTDEC + bool "enable fdtdec test" +diff --git a/lib/Makefile b/lib/Makefile +index 93be86c34a..28e56c710b 100644 +--- a/lib/Makefile ++++ b/lib/Makefile +@@ -9,6 +9,7 @@ obj-$(CONFIG_EFI) += efi/ + obj-$(CONFIG_EFI_LOADER) += efi_driver/ + obj-$(CONFIG_EFI_LOADER) += efi_loader/ + obj-$(CONFIG_CMD_BOOTEFI_SELFTEST) += efi_selftest/ ++obj-$(CONFIG_ARM_FFA_TRANSPORT_HELPERS) += arm-ffa/ + obj-$(CONFIG_LZMA) += lzma/ + obj-$(CONFIG_BZIP2) += bzip2/ + obj-$(CONFIG_TIZEN) += tizen/ +diff --git a/lib/arm-ffa/Kconfig b/lib/arm-ffa/Kconfig +new file mode 100644 +index 0000000000..79acbc5a8f +--- /dev/null ++++ b/lib/arm-ffa/Kconfig +@@ -0,0 +1,6 @@ ++config ARM_FFA_TRANSPORT_HELPERS ++ bool "Enable interface helpers for Arm Firmware Framework for Armv8-A" ++ depends on ARM_FFA_TRANSPORT ++ help ++ User layers call FF-A interfaces using helper functions which ++ pass the data and the FF-A function ID to the low level driver +diff --git a/lib/arm-ffa/Makefile b/lib/arm-ffa/Makefile +new file mode 100644 +index 0000000000..c30c0f3981 +--- /dev/null ++++ b/lib/arm-ffa/Makefile +@@ -0,0 +1,8 @@ ++# SPDX-License-Identifier: GPL-2.0+ ++# ++# (C) Copyright 2021 Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++# ++ ++# This file only gets included when CONFIG_ARM_FFA_TRANSPORT_HELPERS is set ++ ++obj-y += arm_ffa_helper.o +diff --git a/lib/arm-ffa/arm_ffa_helper.c b/lib/arm-ffa/arm_ffa_helper.c +new file mode 100644 +index 0000000000..623899d380 +--- /dev/null ++++ b/lib/arm-ffa/arm_ffa_helper.c +@@ -0,0 +1,188 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#include <common.h> ++#include <arm_ffa_helper.h> ++#include <uuid.h> ++ ++/** ++ * ffa_helper_get_partitions_info - Wrapper function for FFA_PARTITION_INFO_GET ++ * ++ * @func_data: Pointer to the FF-A function arguments container ++ * structure. ++ * The passed arguments: ++ * Mode 1: When getting from the driver the number of ++ * secure partitions: ++ * @data0_size: UUID size ++ * @data0: pointer to the UUID (little endian) ++ * @data1_size: size of the number of partitions ++ * variable ++ * @data1: pointer to the number of partitions ++ * variable. The variable will be set ++ * by the driver ++ * Mode 2: When requesting the driver to return the ++ * partitions information: ++ * @data0_size: UUID size ++ * @data0: pointer to the UUID (little endian) ++ * @data1_size: size of the SPs information buffer ++ * @data1: pointer to SPs information buffer ++ * (allocated by the client). ++ * The buffer will be filled by the driver ++ * ++ * This is the boot time function used by clients who wants to get from secure ++ * world the partition(s) information. ++ * ++ * A client of the FF-A driver should know the UUID of the service it wants to ++ * access. It should use the UUID to request the FF-A driver to provide the ++ * partition(s) information of the service. The client should use ++ * ffa_helper_get_partitions_info to pass the UUID information to the driver ++ * which uses PARTITION_INFO_GET to obtain the partition(s) information. ++ * ++ * ffa_helper_get_partitions_info should be called twice. First call is to get ++ * from the driver the number of secure partitions (SPs) associated to a ++ * particular UUID. Then, the caller (client) allocates the buffer to host the ++ * SPs data and issues a 2nd call. Then, the driver fills the SPs data in the ++ * pre-allocated buffer. ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++int ffa_helper_get_partitions_info(struct ffa_interface_data *func_data) ++{ ++ return ffa_get_invoke_func(FFA_PARTITION_INFO_GET, func_data); ++} ++ ++/** ++ * ffa_helper_unmap_rxtx_buffers - Wrapper function for FFA_RXTX_UNMAP ++ * ++ * This is the boot time function that allows clients to unmap the RX/TX ++ * buffers ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++int ffa_helper_unmap_rxtx_buffers(void) ++{ ++ return ffa_get_invoke_func(FFA_RXTX_UNMAP, NULL); ++} ++ ++/** ++ * ffa_helper_msg_send_direct_req - Wrapper function for ++ * FFA_MSG_SEND_DIRECT_{REQ,RESP} ++ * @func_data: Pointer to the FF-A function arguments container structure. ++ * The passed arguments: ++ * @data0_size: partition ID size ++ * @data0: pointer to the partition ID ++ * @data1_size: exchanged data size ++ * @data1: pointer to the data buffer preallocated by the client (in/out) ++ * ++ * This is the runtime function that allows clients to send data to the secure ++ * world partitions. The arm_ffa driver uses FFA_MSG_SEND_DIRECT_REQ to send the ++ * data to the secure partition. The response from the secure partition is ++ * handled internally by the driver using FFA_MSG_SEND_DIRECT_RESP and returned ++ * to ffa_helper_msg_send_direct_req through @func_data ++ * ++ * The maximum size of the data that can be exchanged is 20 bytes which is ++ * sizeof(struct ffa_send_direct_data) as defined by the FF-A specification 1.0 ++ * in the section relevant to FFA_MSG_SEND_DIRECT_{REQ,RESP} ++ * ++ * The client should pre-allocate a buffer pointed by @data1 which the size ++ * is sizeof(struct ffa_send_direct_data) ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++int __ffa_runtime ffa_helper_msg_send_direct_req(struct ffa_interface_data ++ *func_data) ++{ ++ return ffa_get_invoke_func(FFA_MSG_SEND_DIRECT_REQ, func_data); ++} ++ ++/** ++ * ffa_helper_init_device - Wrapper function for probing the arm_ffa device ++ * ++ * This boot time function should be called to probe the arm_ffa device so ++ * it becomes ready for use. ++ * To achieve that, this function is called automatically at initcalls ++ * level (after u-boot relocation). ++ * ++ * Return: ++ * ++ * FFA_ERR_STAT_SUCCESS on success. Otherwise, failure ++ */ ++int ffa_helper_init_device(void) ++{ ++ return ffa_init_device(); ++} ++ ++/** ++ * ffa_uuid_str_to_bin - Converts a big endian UUID string to a little endian buffer ++ * @uuid_str: UUID string in big endian format (36 bytes wide + '/0') ++ * @uuid_bin: preallocated 16 bytes UUID buffer in little endian format ++ * ++ * UUID binary format used by the FF-A framework (16 bytes): ++ * ++ * [LSB] 4B-2B-2B-2B-6B (little endian data fields) ++ * ++ * UUID string is 36 length of characters (36 bytes): ++ * ++ * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx ++ * be be be be be ++ * ++ * where x is a hexadecimal character. Fields are separated by '-'s. ++ * When converting to a binary UUID, these endianness rules apply: ++ * be: means the field in the string is considered a big endian hex number ++ * and should be converted to little endian binary format ++ * ++ * Return: ++ * ++ * uuid_bin filled with little endian UUID data ++ * On success 0 is returned. Otherwise, failure code. ++ */ ++int ffa_uuid_str_to_bin(const char *uuid_str, unsigned char *uuid_bin) ++{ ++ u16 tmp16 = 0; ++ u32 tmp32 = 0; ++ u64 tmp64 = 0; ++ ++ if (!uuid_str_valid(uuid_str) || !uuid_bin) ++ return -EINVAL; ++ ++ /* ++ * reverse bytes from big to little endian ++ */ ++ tmp32 = simple_strtoul(uuid_str, NULL, 16); ++ memcpy(uuid_bin, &tmp32, 4); ++ ++ /* ++ * reverse bytes from big to little endian ++ */ ++ tmp16 = simple_strtoul(uuid_str + 9, NULL, 16); ++ memcpy(uuid_bin + 4, &tmp16, 2); ++ ++ /* ++ * reverse bytes from big to little endian ++ */ ++ tmp16 = simple_strtoul(uuid_str + 14, NULL, 16); ++ memcpy(uuid_bin + 6, &tmp16, 2); ++ ++ /* ++ * reverse bytes from big to little endian ++ */ ++ tmp16 = simple_strtoul(uuid_str + 19, NULL, 16); ++ memcpy(uuid_bin + 8, &tmp16, 2); ++ ++ /* ++ * reverse bytes from big to little endian ++ */ ++ tmp64 = simple_strtoull(uuid_str + 24, NULL, 16); ++ memcpy(uuid_bin + 10, (char *)&tmp64, 6); ++ ++ return 0; ++} +diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c +index f0283b539e..6f5f32b903 100644 +--- a/lib/efi_loader/efi_boottime.c ++++ b/lib/efi_loader/efi_boottime.c +@@ -23,6 +23,10 @@ + #include <asm/setjmp.h> + #include <linux/libfdt_env.h> + ++#if defined(CONFIG_ARM_FFA_TRANSPORT) ++#include <arm_ffa_helper.h> ++#endif ++ + DECLARE_GLOBAL_DATA_PTR; + + /* Task priority level */ +@@ -2108,6 +2112,10 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, + struct efi_event *evt, *next_event; + efi_status_t ret = EFI_SUCCESS; + ++#if defined(CONFIG_ARM_FFA_TRANSPORT) ++ int ffa_ret; ++#endif ++ + EFI_ENTRY("%p, %zx", image_handle, map_key); + + /* Check that the caller has read the current memory map */ +@@ -2157,6 +2165,15 @@ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, + dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL); + } + ++#if defined(CONFIG_ARM_FFA_TRANSPORT) ++ /* unmap FF-A RX/TX buffers */ ++ ffa_ret = ffa_helper_unmap_rxtx_buffers(); ++ if (ffa_ret) ++ debug("[efi_boottime][ERROR]: can not unmap FF-A RX/TX buffers\n"); ++ else ++ debug("[efi_boottime][INFO]: FF-A RX/TX buffers unmapped\n"); ++#endif ++ + /* Patch out unsupported runtime function */ + efi_runtime_detach(); + +-- +2.17.1 + diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0019-arm_ffa-introducing-armffa-command.patch b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0019-arm_ffa-introducing-armffa-command.patch new file mode 100644 index 0000000..373b84a --- /dev/null +++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0019-arm_ffa-introducing-armffa-command.patch @@ -0,0 +1,344 @@ +Upstream-Status: Pending [Not submitted to upstream yet] +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> + +From fcb1d508e144b6239cf97dddfcb62d5f1e91ccd2 Mon Sep 17 00:00:00 2001 +From: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +Date: Tue, 16 Nov 2021 12:36:27 +0000 +Subject: [PATCH 2/5] arm_ffa: introducing armffa command + +A new armffa command is provided as an example of how to use +the FF-A helper functions to communicate with secure world. + +The armffa command allows to query secure partitions data from +the secure world and exchanging messages with the partitions. + +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +--- + MAINTAINERS | 1 + + cmd/Kconfig | 10 ++ + cmd/Makefile | 2 + + cmd/armffa.c | 266 +++++++++++++++++++++++++++++++++++++++++++++++++++ + 4 files changed, 279 insertions(+) + create mode 100644 cmd/armffa.c + +diff --git a/MAINTAINERS b/MAINTAINERS +index 3f61e374aa..7db7b7d637 100644 +--- a/MAINTAINERS ++++ b/MAINTAINERS +@@ -218,6 +218,7 @@ F: include/configs/turris_*.h + ARM FF-A + M: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> + S: Maintained ++F: cmd/armffa.c + F: drivers/arm-ffa/ + F: include/arm_ffa.h + F: include/arm_ffa_helper.h +diff --git a/cmd/Kconfig b/cmd/Kconfig +index a33b2a2a12..c34cf6dc8d 100644 +--- a/cmd/Kconfig ++++ b/cmd/Kconfig +@@ -785,6 +785,16 @@ endmenu + + menu "Device access commands" + ++config CMD_ARMFFA ++ bool "Arm FF-A test command" ++ depends on ARM_FFA_TRANSPORT ++ help ++ Provides a test command for the Arm FF-A driver ++ supported options: ++ - Listing the partition(s) info ++ - Sending a data pattern to the specified partition ++ - Displaying the arm_ffa device info ++ + config CMD_ARMFLASH + #depends on FLASH_CFI_DRIVER + bool "armflash" +diff --git a/cmd/Makefile b/cmd/Makefile +index ed3669411e..ccd4882676 100644 +--- a/cmd/Makefile ++++ b/cmd/Makefile +@@ -12,6 +12,8 @@ obj-y += panic.o + obj-y += version.o + + # command ++ ++obj-$(CONFIG_CMD_ARMFFA) += armffa.o + obj-$(CONFIG_CMD_ACPI) += acpi.o + obj-$(CONFIG_CMD_ADDRMAP) += addrmap.o + obj-$(CONFIG_CMD_AES) += aes.o +diff --git a/cmd/armffa.c b/cmd/armffa.c +new file mode 100644 +index 0000000000..71a6ebb656 +--- /dev/null ++++ b/cmd/armffa.c +@@ -0,0 +1,266 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#include <arm_ffa_helper.h> ++#include <asm/io.h> ++#include <common.h> ++#include <command.h> ++#include <dm.h> ++#include <mapmem.h> ++#include <stdlib.h> ++ ++/** ++ * do_ffa_get_singular_partition_info - implementation of the getpart subcommand ++ * @cmdtp: Command Table ++ * @flag: flags ++ * @argc: number of arguments ++ * @argv: arguments ++ * ++ * This function queries the secure partition information which the UUID is provided ++ * as an argument. The function uses the arm_ffa driver helper function ++ * to retrieve the data. ++ * The input UUID string is expected to be in big endian format. ++ * ++ * Return: ++ * ++ * CMD_RET_SUCCESS: on success, otherwise failure ++ */ ++static int do_ffa_get_singular_partition_info(struct cmd_tbl *cmdtp, int flag, int argc, ++ char *const argv[]) ++{ ++ struct ffa_interface_data func_data = {0}; ++ u32 count = 0; ++ int ret; ++ union ffa_partition_uuid service_uuid = {0}; ++ struct ffa_partition_info *parts_info; ++ u32 info_idx; ++ ++ if (argc != 1) ++ return -EINVAL; ++ ++ if (ffa_uuid_str_to_bin(argv[0], (unsigned char *)&service_uuid)) { ++ ffa_err("Invalid UUID"); ++ return -EINVAL; ++ } ++ ++ /* ++ * get from the driver the count of the SPs matching the UUID ++ */ ++ func_data.data0_size = sizeof(service_uuid); ++ func_data.data0 = &service_uuid; ++ func_data.data1_size = sizeof(count); ++ func_data.data1 = &count; ++ ++ ret = ffa_helper_get_partitions_info(&func_data); ++ if (ret != FFA_ERR_STAT_SUCCESS) { ++ ffa_err("Failure in querying partitions count (error code: %d)", ret); ++ return ret; ++ } ++ ++ if (!count) { ++ ffa_info("No secure partition found"); ++ return ret; ++ } ++ ++ /* ++ * pre-allocate a buffer to be filled by the driver ++ * with ffa_partition_info structs ++ */ ++ ++ parts_info = calloc(count, sizeof(struct ffa_partition_info)); ++ if (!parts_info) ++ return -EINVAL; ++ ++ ffa_info("Pre-allocating %d partition(s) info structures", count); ++ ++ func_data.data1_size = count * sizeof(struct ffa_partition_info); ++ func_data.data1 = parts_info; ++ ++ /* ++ * ask the driver to fill the buffer with the SPs info ++ */ ++ ret = ffa_helper_get_partitions_info(&func_data); ++ if (ret != FFA_ERR_STAT_SUCCESS) { ++ ffa_err("Failure in querying partition(s) info (error code: %d)", ret); ++ free(parts_info); ++ return ret; ++ } ++ ++ /* ++ * SPs found , show the partition information ++ */ ++ for (info_idx = 0; info_idx < count ; info_idx++) { ++ ffa_info("Partition: id = 0x%x , exec_ctxt 0x%x , properties 0x%x", ++ parts_info[info_idx].id, ++ parts_info[info_idx].exec_ctxt, ++ parts_info[info_idx].properties); ++ } ++ ++ free(parts_info); ++ ++ return 0; ++} ++ ++/** ++ * do_ffa_msg_send_direct_req - implementation of the ping subcommand ++ * @cmdtp: Command Table ++ * @flag: flags ++ * @argc: number of arguments ++ * @argv: arguments ++ * ++ * This function sends data to the secure partition which the ID is provided ++ * as an argument. The function uses the arm_ffa driver helper function ++ * to send data. ++ * ++ * Return: ++ * ++ * CMD_RET_SUCCESS: on success, otherwise failure ++ */ ++int do_ffa_msg_send_direct_req(struct cmd_tbl *cmdtp, int flag, int argc, ++ char *const argv[]) ++{ ++ struct ffa_interface_data func_data = {0}; ++ struct ffa_send_direct_data msg = {0}; ++ u32 pattern = 0xaabbccd0; ++ u16 part_id; ++ int ret; ++ ++ if (argc != 1) ++ return -EINVAL; ++ ++ errno = 0; ++ part_id = strtoul(argv[0], NULL, 16); ++ ++ if (errno) { ++ ffa_err("Invalid partition ID"); ++ return -EINVAL; ++ } ++ ++ /* ++ * telling the driver which partition to use ++ */ ++ func_data.data0_size = sizeof(part_id); ++ func_data.data0 = &part_id; ++ ++ /* ++ * filling the message data ++ */ ++ msg.a3 = ++pattern; ++ msg.a4 = ++pattern; ++ msg.a5 = ++pattern; ++ msg.a6 = ++pattern; ++ msg.a7 = ++pattern; ++ func_data.data1_size = sizeof(msg); ++ func_data.data1 = &msg; ++ ++ ret = ffa_helper_msg_send_direct_req(&func_data); ++ if (ret == FFA_ERR_STAT_SUCCESS) { ++ u8 cnt; ++ ++ ffa_info("SP response:\n[LSB]"); ++ for (cnt = 0; ++ cnt < sizeof(struct ffa_send_direct_data) / sizeof(u32); ++ cnt++) ++ ffa_info("0x%x", ((u32 *)&msg)[cnt]); ++ } else { ++ ffa_err("Sending direct request error (%d)", ret); ++ } ++ ++ return ret; ++} ++ ++/** ++ *do_ffa_dev_list - implementation of the devlist subcommand ++ * @cmdtp: [in] Command Table ++ * @flag: flags ++ * @argc: number of arguments ++ * @argv: arguments ++ * ++ * This function queries the devices belonging to the UCLASS_FFA ++ * class. Currently, one device is expected to show up: the arm_ffa device ++ * ++ * Return: ++ * ++ * CMD_RET_SUCCESS: on success, otherwise failure ++ */ ++int do_ffa_dev_list(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) ++{ ++ struct udevice *dev = NULL; ++ int i, ret; ++ ++ ffa_info("arm_ffa uclass entries:"); ++ ++ for (i = 0, ret = uclass_first_device(UCLASS_FFA, &dev); ++ dev; ++ ret = uclass_next_device(&dev), i++) { ++ if (ret) ++ break; ++ ++ ffa_info("entry %d - instance %08x, ops %08x, plat %08x", ++ i, ++ (u32)map_to_sysmem(dev), ++ (u32)map_to_sysmem(dev->driver->ops), ++ (u32)map_to_sysmem(dev_get_plat(dev))); ++ } ++ ++ return cmd_process_error(cmdtp, ret); ++} ++ ++static struct cmd_tbl armffa_commands[] = { ++ U_BOOT_CMD_MKENT(getpart, 1, 1, do_ffa_get_singular_partition_info, "", ""), ++ U_BOOT_CMD_MKENT(ping, 1, 1, do_ffa_msg_send_direct_req, "", ""), ++ U_BOOT_CMD_MKENT(devlist, 0, 1, do_ffa_dev_list, "", ""), ++}; ++ ++/** ++ * do_armffa - the armffa command main function ++ * @cmdtp: Command Table ++ * @flag: flags ++ * @argc: number of arguments ++ * @argv: arguments ++ * ++ * This function identifies which armffa subcommand to run. ++ * Then, it makes sure the arm_ffa device is probed and ++ * ready for use. ++ * Then, it runs the subcommand. ++ * ++ * Return: ++ * ++ * CMD_RET_SUCCESS: on success, otherwise failure ++ */ ++static int do_armffa(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) ++{ ++ struct cmd_tbl *armffa_cmd; ++ int ret; ++ ++ if (argc < 2) ++ return CMD_RET_USAGE; ++ ++ armffa_cmd = find_cmd_tbl(argv[1], armffa_commands, ARRAY_SIZE(armffa_commands)); ++ ++ argc -= 2; ++ argv += 2; ++ ++ if (!armffa_cmd || argc > armffa_cmd->maxargs) ++ return CMD_RET_USAGE; ++ ++ ret = ffa_helper_init_device(); ++ if (ret != FFA_ERR_STAT_SUCCESS) ++ return cmd_process_error(cmdtp, ret); ++ ++ ret = armffa_cmd->cmd(armffa_cmd, flag, argc, argv); ++ ++ return cmd_process_error(armffa_cmd, ret); ++} ++ ++U_BOOT_CMD(armffa, 4, 1, do_armffa, ++ "Arm FF-A operations test command", ++ "getpart <partition UUID>\n" ++ " - lists the partition(s) info\n" ++ "ping <partition ID>\n" ++ " - sends a data pattern to the specified partition\n" ++ "devlist\n" ++ " - displays the arm_ffa device info\n"); +-- +2.17.1 + diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0020-arm_ffa-introducing-test-module-for-UCLASS_FFA.patch b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0020-arm_ffa-introducing-test-module-for-UCLASS_FFA.patch new file mode 100644 index 0000000..9685a46 --- /dev/null +++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0020-arm_ffa-introducing-test-module-for-UCLASS_FFA.patch @@ -0,0 +1,134 @@ +Upstream-Status: Pending [Not submitted to upstream yet] +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> + +From 236c75ffffd580427c52e1a4dcaf4b058d4b0891 Mon Sep 17 00:00:00 2001 +From: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +Date: Tue, 16 Nov 2021 12:38:48 +0000 +Subject: [PATCH 3/5] arm_ffa: introducing test module for UCLASS_FFA + +This is the test module for the UCLASS_FFA class. + +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +--- + MAINTAINERS | 1 + + test/dm/Makefile | 1 + + test/dm/ffa.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++ + test/dm/ffa.h | 19 ++++++++++++++++ + 4 files changed, 77 insertions(+) + create mode 100644 test/dm/ffa.c + create mode 100644 test/dm/ffa.h + +diff --git a/MAINTAINERS b/MAINTAINERS +index 7db7b7d637..c2762ad5d0 100644 +--- a/MAINTAINERS ++++ b/MAINTAINERS +@@ -223,6 +223,7 @@ F: drivers/arm-ffa/ + F: include/arm_ffa.h + F: include/arm_ffa_helper.h + F: lib/arm-ffa/ ++F: test/dm/ffa.c + + ARM FREESCALE IMX + M: Stefano Babic <sbabic@denx.de> +diff --git a/test/dm/Makefile b/test/dm/Makefile +index 55162e9499..0403b3c622 100644 +--- a/test/dm/Makefile ++++ b/test/dm/Makefile +@@ -77,6 +77,7 @@ obj-$(CONFIG_POWER_DOMAIN) += power-domain.o + obj-$(CONFIG_ACPI_PMC) += pmc.o + obj-$(CONFIG_DM_PMIC) += pmic.o + obj-$(CONFIG_DM_PWM) += pwm.o ++obj-$(CONFIG_ARM_FFA_TRANSPORT) += ffa.o + obj-$(CONFIG_QFW) += qfw.o + obj-$(CONFIG_RAM) += ram.o + obj-y += regmap.o +diff --git a/test/dm/ffa.c b/test/dm/ffa.c +new file mode 100644 +index 0000000000..b937cea57b +--- /dev/null ++++ b/test/dm/ffa.c +@@ -0,0 +1,56 @@ ++// SPDX-License-Identifier: GPL-2.0+ ++/* ++ * Test for UCLASS_FFA class ++ * ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#include <common.h> ++#include <dm.h> ++#include <dm/test.h> ++#include <test/test.h> ++#include <test/ut.h> ++#include <arm_ffa_helper.h> ++#include "ffa.h" ++ ++/* Basic test of 'armffa' command */ ++static int dm_test_armffa_cmd(struct unit_test_state *uts) ++{ ++ ut_assertok(ffa_helper_init_device()); ++ ++ ut_assertok(console_record_reset_enable()); ++ ++ /* armffa getpart <UUID> */ ++ ut_assertok(run_command("armffa getpart " SE_PROXY_PARTITION_UUID, 0)); ++ ut_assert_console_end(); ++ ++ /* armffa ping <ID> */ ++ ut_assertok(run_command("armffa ping " SE_PROXY_PARTITION_ID, 0)); ++ ut_assert_console_end(); ++ ++ /* armffa devlist */ ++ ut_assertok(run_command("armffa devlist", 0)); ++ ut_assert_console_end(); ++ ++ return 0; ++} ++ ++DM_TEST(dm_test_armffa_cmd, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT | UT_TESTF_CONSOLE_REC); ++ ++static int test_ffa_msg_send_direct_req(void) ++{ ++ char *const argv[1] = {SE_PROXY_PARTITION_ID}; /* Corstone1000 SE Proxy ID */ ++ ++ return do_ffa_msg_send_direct_req(NULL, 0, 1, argv); ++} ++ ++/* Basic test of the FFA uclass */ ++static int dm_test_ffa_uclass(struct unit_test_state *uts) ++{ ++ ut_assertok(ffa_init_device()); ++ ut_assertok(test_ffa_msg_send_direct_req()); ++ return 0; ++} ++ ++DM_TEST(dm_test_ffa_uclass, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT); +diff --git a/test/dm/ffa.h b/test/dm/ffa.h +new file mode 100644 +index 0000000000..a0802bd692 +--- /dev/null ++++ b/test/dm/ffa.h +@@ -0,0 +1,19 @@ ++/* SPDX-License-Identifier: GPL-2.0+ */ ++/* ++ * (C) Copyright 2021 ARM Limited ++ * Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> ++ */ ++ ++#ifndef __TEST_DM_FFA_H ++#define __TEST_DM_FFA_H ++ ++#define SE_PROXY_PARTITION_ID "0x8002" ++#define SE_PROXY_PARTITION_UUID "46bb39d1-b4d9-45b5-88ff-040027dab249" ++ ++/** ++ * do_ffa_msg_send_direct_req - implementation of the ping subcommand ++ */ ++int do_ffa_msg_send_direct_req(struct cmd_tbl *cmdtp, int flag, int argc, ++ char *const argv[]); ++ ++#endif /*__TEST_DM_FFA_H */ +-- +2.17.1 + diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0021-arm_ffa-introducing-MM-communication-with-FF-A.patch b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0021-arm_ffa-introducing-MM-communication-with-FF-A.patch new file mode 100644 index 0000000..551a26e --- /dev/null +++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0021-arm_ffa-introducing-MM-communication-with-FF-A.patch @@ -0,0 +1,383 @@ +Upstream-Status: Pending [Not submitted to upstream yet] +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> + +From aa7d7298547c5e1c0e1c2aaafc28f3fdb5084780 Mon Sep 17 00:00:00 2001 +From: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +Date: Wed, 13 Oct 2021 17:51:44 +0100 +Subject: [PATCH 4/5] arm_ffa: introducing MM communication with FF-A + +This commit allows to perform MM communication using FF-A transport. + +The MM SP (also called partition) can be StandAlonneMM or smm-gateway. +Both partitions run in OP-TEE. + +When using the u-boot FF-A driver, StandAlonneMM and smm-gateway are +supported. + +On EFI services such as GetVariable()/SetVariable(), the data +is copied from the communication buffer to the MM shared buffer. + +Then, notifies the MM SP about data availability in the MM shared buffer. +Communication with the MM SP is performed using FF-A transport. + +On such event, MM SP can read the data and updates the MM shared buffer +with response data. + +The response data is copied back to the communication buffer. + +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +--- + lib/efi_loader/Kconfig | 14 +- + lib/efi_loader/efi_variable_tee.c | 255 +++++++++++++++++++++++++++++- + 2 files changed, 263 insertions(+), 6 deletions(-) + +diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig +index f48d9e8b51..5a31a42456 100644 +--- a/lib/efi_loader/Kconfig ++++ b/lib/efi_loader/Kconfig +@@ -55,13 +55,23 @@ config EFI_VARIABLE_FILE_STORE + stored as file /ubootefi.var on the EFI system partition. + + config EFI_MM_COMM_TEE +- bool "UEFI variables storage service via OP-TEE" +- depends on OPTEE ++ bool "UEFI variables storage service via the trusted world" ++ depends on OPTEE || ARM_FFA_TRANSPORT + help ++ The MM SP (also called partition) can be StandAlonneMM or smm-gateway. ++ When using the u-boot OP-TEE driver, StandAlonneMM is supported. ++ When using the u-boot FF-A driver, StandAlonneMM and smm-gateway are supported. ++ + If OP-TEE is present and running StandAloneMM, dispatch all UEFI + variable related operations to that. The application will verify, + authenticate and store the variables on an RPMB. + ++ When ARM_FFA_TRANSPORT is used, dispatch all UEFI variable related ++ operations to the MM SP running under Optee in the trusted world. ++ A door bell mechanism is used to notify the SP when there is data in the shared ++ MM buffer. The data is copied by u-boot to thea shared buffer before issuing ++ the door bell event. ++ + endchoice + + config EFI_VARIABLES_PRESEED +diff --git a/lib/efi_loader/efi_variable_tee.c b/lib/efi_loader/efi_variable_tee.c +index 51920bcb51..b363ec92bf 100644 +--- a/lib/efi_loader/efi_variable_tee.c ++++ b/lib/efi_loader/efi_variable_tee.c +@@ -15,7 +15,28 @@ + #include <malloc.h> + #include <mm_communication.h> + ++#if (IS_ENABLED(CONFIG_OPTEE)) + #define OPTEE_PAGE_SIZE BIT(12) ++#endif ++ ++#if (IS_ENABLED(CONFIG_ARM_FFA_TRANSPORT)) ++ ++#include <arm_ffa_helper.h> ++#include <mapmem.h> ++ ++/* MM return codes */ ++#define MM_SUCCESS (0) ++ ++#define ARM_SVC_ID_SP_EVENT_COMPLETE_AARCH64 (0xC4000061) ++#define ARM_SVC_ID_SP_EVENT_COMPLETE ARM_SVC_ID_SP_EVENT_COMPLETE_AARCH64 ++ ++/* MM_SP_UUID_DATA defined by the platform */ ++union ffa_partition_uuid mm_sp_svc_uuid = {.bytes = {MM_SP_UUID_DATA}}; ++ ++static u16 __efi_runtime_data mm_sp_id; ++ ++#endif ++ + extern struct efi_var_file __efi_runtime_data *efi_var_buf; + static efi_uintn_t max_buffer_size; /* comm + var + func + data */ + static efi_uintn_t max_payload_size; /* func + data */ +@@ -25,6 +46,7 @@ struct mm_connection { + u32 session; + }; + ++#if (IS_ENABLED(CONFIG_OPTEE)) + /** + * get_connection() - Retrieve OP-TEE session for a specific UUID. + * +@@ -140,16 +162,229 @@ static efi_status_t optee_mm_communicate(void *comm_buf, ulong dsize) + + return ret; + } ++#endif ++ ++#if (IS_ENABLED(CONFIG_ARM_FFA_TRANSPORT)) ++ ++/** ++ * ffa_notify_mm_sp() - Announce there is data in the shared buffer ++ * ++ * Notifies the MM partition in the trusted world that ++ * data is available in the shared buffer. ++ * This is a blocking call during which trusted world has exclusive access ++ * to the MM shared buffer. ++ * ++ * Return: ++ * ++ * 0 on success ++ */ ++static int __efi_runtime ffa_notify_mm_sp(void) ++{ ++ struct ffa_interface_data func_data = {0}; ++ struct ffa_send_direct_data msg = {0}; ++ int ret; ++ u32 sp_event_complete; ++ int sp_event_ret; ++ ++ func_data.data0_size = sizeof(mm_sp_id); ++ func_data.data0 = &mm_sp_id; ++ ++ msg.a3 = FFA_SHARED_MM_BUFFER_ADDR; ++ msg.a4 = FFA_SHARED_MM_BUFFER_SIZE; ++ func_data.data1_size = sizeof(msg); ++ func_data.data1 = &msg; ++ ++ ret = ffa_helper_msg_send_direct_req(&func_data); ++ if (ret != FFA_ERR_STAT_SUCCESS) { ++ log_err("EFI: Failure to notify the MM SP , FF-A error (%d)\n", ret); ++ return ret; ++ } ++ ++ sp_event_complete = msg.a3; ++ sp_event_ret = (int)msg.a4; ++ ++ if (sp_event_complete == ARM_SVC_ID_SP_EVENT_COMPLETE && sp_event_ret == MM_SUCCESS) ++ return 0; ++ ++ log_err("EFI: Failure to notify the MM SP (0x%x , %d)\n", ++ sp_event_complete, ++ sp_event_ret); ++ ++ return -EACCES; ++} ++ ++/** ++ * ffa_discover_mm_sp_id() - Query the MM partition ID ++ * ++ * Use the FF-A driver to get the MM partition ID. ++ * If multiple partitions are found, use the first one ++ * ++ * Return: ++ * ++ * 0 on success ++ */ ++static int __efi_runtime ffa_discover_mm_sp_id(void) ++{ ++ struct ffa_interface_data func_data = {0}; ++ u32 count = 0; ++ int ret; ++ struct ffa_partition_info *parts_info; ++ ++ /* ++ * get from the driver the count of the SPs matching the UUID ++ */ ++ func_data.data0_size = sizeof(mm_sp_svc_uuid); ++ func_data.data0 = &mm_sp_svc_uuid; ++ func_data.data1_size = sizeof(count); ++ func_data.data1 = &count; ++ ++ ret = ffa_helper_get_partitions_info(&func_data); ++ if (ret != FFA_ERR_STAT_SUCCESS) { ++ log_err("EFI: Failure in querying partitions count (error code: %d)\n", ret); ++ return ret; ++ } ++ ++ if (!count) { ++ log_info("EFI: No MM partition found\n"); ++ return ret; ++ } ++ ++ /* ++ * pre-allocate a buffer to be filled by the driver ++ * with ffa_partition_info structs ++ */ ++ ++ parts_info = calloc(count, sizeof(struct ffa_partition_info)); ++ if (!parts_info) ++ return -EINVAL; ++ ++ log_info("EFI: Pre-allocating %d partition(s) info structures\n", count); ++ ++ func_data.data1_size = count * ++ sizeof(struct ffa_partition_info); ++ func_data.data1 = parts_info; ++ ++ /* ++ * ask the driver to fill the ++ * buffer with the SPs info ++ */ ++ ret = ffa_helper_get_partitions_info(&func_data); ++ if (ret != FFA_ERR_STAT_SUCCESS) { ++ log_err("EFI: Failure in querying partition(s) info (error code: %d)\n", ret); ++ free(parts_info); ++ return ret; ++ } ++ ++ /* ++ * MM SPs found , use the first one ++ */ ++ ++ mm_sp_id = parts_info[0].id; ++ ++ log_info("EFI: MM partition ID 0x%x\n", mm_sp_id); ++ ++ free(parts_info); ++ ++ return 0; ++} ++ ++/** ++ * ffa_mm_communicate() - Exchange EFI services data with the MM partition using FF-A ++ * @comm_buf: locally allocated communication buffer used for for rx/tx ++ * @dsize: communication buffer size ++ * ++ * Issues a door bell event to notify the MM partition (SP) running in OP-TEE ++ * that there is data to read from the shared buffer. ++ * Communication with the MM SP is performed using FF-A transport. ++ * On the event, MM SP can read the data from the buffer and ++ * update the MM shared buffer with response data. ++ * The response data is copied back to the communication buffer. ++ * ++ * Return: ++ * ++ * EFI status code ++ */ ++static efi_status_t __efi_runtime ffa_mm_communicate(void *comm_buf, ulong comm_buf_size) ++{ ++ ulong tx_data_size; ++ int ffa_ret; ++ struct efi_mm_communicate_header *mm_hdr; ++ void *virt_shared_buf; ++ ++ if (!comm_buf) ++ return EFI_INVALID_PARAMETER; ++ ++ /* Discover MM partition ID */ ++ if (!mm_sp_id && ffa_discover_mm_sp_id() != FFA_ERR_STAT_SUCCESS) { ++ log_err("EFI: Failure to discover MM partition ID\n"); ++ return EFI_UNSUPPORTED; ++ } ++ ++ mm_hdr = (struct efi_mm_communicate_header *)comm_buf; ++ tx_data_size = mm_hdr->message_len + sizeof(efi_guid_t) + sizeof(size_t); ++ ++ if (comm_buf_size != tx_data_size || tx_data_size > FFA_SHARED_MM_BUFFER_SIZE) ++ return EFI_INVALID_PARAMETER; ++ ++ /* Copy the data to the shared buffer */ ++ ++ virt_shared_buf = (void *)map_sysmem((phys_addr_t)FFA_SHARED_MM_BUFFER_ADDR, 0); ++ efi_memcpy_runtime(virt_shared_buf, comm_buf, tx_data_size); ++ ++ /* Announce there is data in the shared buffer */ ++ ++ ffa_ret = ffa_notify_mm_sp(); ++ if (ffa_ret) ++ unmap_sysmem(virt_shared_buf); ++ ++ switch (ffa_ret) { ++ case 0: ++ { ++ ulong rx_data_size; ++ /* Copy the MM SP response from the shared buffer to the communication buffer */ ++ rx_data_size = ((struct efi_mm_communicate_header *)virt_shared_buf)->message_len + ++ sizeof(efi_guid_t) + ++ sizeof(size_t); ++ ++ if (rx_data_size > comm_buf_size) { ++ unmap_sysmem(virt_shared_buf); ++ return EFI_OUT_OF_RESOURCES; ++ } ++ ++ efi_memcpy_runtime(comm_buf, virt_shared_buf, rx_data_size); ++ unmap_sysmem(virt_shared_buf); ++ ++ return EFI_SUCCESS; ++ } ++ case -EINVAL: ++ return EFI_DEVICE_ERROR; ++ case -EPERM: ++ return EFI_INVALID_PARAMETER; ++ case -EACCES: ++ return EFI_ACCESS_DENIED; ++ case -EBUSY: ++ return EFI_OUT_OF_RESOURCES; ++ default: ++ return EFI_ACCESS_DENIED; ++ } ++} ++#endif + + /** +- * mm_communicate() - Adjust the cmonnucation buffer to StandAlonneMM and send ++ * mm_communicate() - Adjust the communication buffer to the MM SP and send + * it to OP-TEE + * +- * @comm_buf: locally allocted communcation buffer ++ * @comm_buf: locally allocted communication buffer + * @dsize: buffer size ++ * ++ * The MM SP (also called partition) can be StandAlonneMM or smm-gateway. ++ * The comm_buf format is the same for both partitions. ++ * When using the u-boot OP-TEE driver, StandAlonneMM is supported. ++ * When using the u-boot FF-A driver, StandAlonneMM and smm-gateway are supported. ++ * + * Return: status code + */ +-static efi_status_t mm_communicate(u8 *comm_buf, efi_uintn_t dsize) ++static efi_status_t __efi_runtime mm_communicate(u8 *comm_buf, efi_uintn_t dsize) + { + efi_status_t ret; + struct efi_mm_communicate_header *mm_hdr; +@@ -159,7 +394,11 @@ static efi_status_t mm_communicate(u8 *comm_buf, efi_uintn_t dsize) + mm_hdr = (struct efi_mm_communicate_header *)comm_buf; + var_hdr = (struct smm_variable_communicate_header *)mm_hdr->data; + ++ #if (IS_ENABLED(CONFIG_OPTEE)) + ret = optee_mm_communicate(comm_buf, dsize); ++ #elif (IS_ENABLED(CONFIG_ARM_FFA_TRANSPORT)) ++ ret = ffa_mm_communicate(comm_buf, dsize); ++ #endif + if (ret != EFI_SUCCESS) { + log_err("%s failed!\n", __func__); + return ret; +@@ -255,6 +494,8 @@ efi_status_t EFIAPI get_max_payload(efi_uintn_t *size) + goto out; + } + *size = var_payload->size; ++ ++ #if (IS_ENABLED(CONFIG_OPTEE)) + /* + * Although the max payload is configurable on StMM, we only share a + * single page from OP-TEE for the non-secure buffer used to communicate +@@ -264,6 +505,12 @@ efi_status_t EFIAPI get_max_payload(efi_uintn_t *size) + if (*size > OPTEE_PAGE_SIZE) + *size = OPTEE_PAGE_SIZE - MM_COMMUNICATE_HEADER_SIZE - + MM_VARIABLE_COMMUNICATE_SIZE; ++ #elif (IS_ENABLED(CONFIG_ARM_FFA_TRANSPORT)) ++ if (*size > FFA_SHARED_MM_BUFFER_SIZE) ++ *size = FFA_SHARED_MM_BUFFER_SIZE - MM_COMMUNICATE_HEADER_SIZE - ++ MM_VARIABLE_COMMUNICATE_SIZE; ++ #endif ++ + /* + * There seems to be a bug in EDK2 miscalculating the boundaries and + * size checks, so deduct 2 more bytes to fulfill this requirement. Fix +@@ -690,7 +937,7 @@ void efi_variables_boot_exit_notify(void) + ret = EFI_NOT_FOUND; + + if (ret != EFI_SUCCESS) +- log_err("Unable to notify StMM for ExitBootServices\n"); ++ log_err("Unable to notify the MM partition for ExitBootServices\n"); + free(comm_buf); + + /* +-- +2.17.1 + diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0022-arm_ffa-corstone1000-enable-FF-A-and-MM-support.patch b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0022-arm_ffa-corstone1000-enable-FF-A-and-MM-support.patch new file mode 100644 index 0000000..be82d1c --- /dev/null +++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot/corstone1000/0022-arm_ffa-corstone1000-enable-FF-A-and-MM-support.patch @@ -0,0 +1,112 @@ +Upstream-Status: Pending [Not submitted to upstream yet] +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> + +From 202f8d5783b8bcf1119574fd1b3a47ec6ff4f520 Mon Sep 17 00:00:00 2001 +From: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +Date: Wed, 24 Nov 2021 21:07:44 +0000 +Subject: [PATCH] arm_ffa: corstone1000: enable FF-A and MM support + +This commit allows corstone1000 platform to perform +MM communication between u-boot and the secure world +using FF-A transport. + +Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> +--- + arch/arm/dts/corstone1000-fvp.dts | 4 ++++ + arch/arm/dts/corstone1000-mps3.dts | 4 ++++ + arch/arm/dts/corstone1000.dtsi | 7 +++++++ + configs/corstone1000_defconfig | 5 +++++ + include/configs/corstone1000.h | 14 ++++++++++++++ + 5 files changed, 34 insertions(+) + +diff --git a/arch/arm/dts/corstone1000-fvp.dts b/arch/arm/dts/corstone1000-fvp.dts +index 2188ca5e0e..92da15df4e 100644 +--- a/arch/arm/dts/corstone1000-fvp.dts ++++ b/arch/arm/dts/corstone1000-fvp.dts +@@ -26,3 +26,7 @@ + &refclk { + clock-frequency = <50000000>; + }; ++ ++&arm_ffa { ++ status = "okay"; ++}; +diff --git a/arch/arm/dts/corstone1000-mps3.dts b/arch/arm/dts/corstone1000-mps3.dts +index a3726f1e1f..6842395405 100644 +--- a/arch/arm/dts/corstone1000-mps3.dts ++++ b/arch/arm/dts/corstone1000-mps3.dts +@@ -40,3 +40,7 @@ + &refclk { + clock-frequency = <50000000>; + }; ++ ++&arm_ffa { ++ status = "okay"; ++}; +diff --git a/arch/arm/dts/corstone1000.dtsi b/arch/arm/dts/corstone1000.dtsi +index da1725e01f..97dfac9ae7 100644 +--- a/arch/arm/dts/corstone1000.dtsi ++++ b/arch/arm/dts/corstone1000.dtsi +@@ -153,4 +153,11 @@ + compatible = "arm,psci-1.0", "arm,psci-0.2"; + method = "smc"; + }; ++ ++ arm_ffa: arm_ffa { ++ compatible = "arm,ffa"; ++ method = "smc"; ++ status = "disabled"; ++ }; ++ + }; +diff --git a/configs/corstone1000_defconfig b/configs/corstone1000_defconfig +index dd85193c0f..48ec37f641 100644 +--- a/configs/corstone1000_defconfig ++++ b/configs/corstone1000_defconfig +@@ -9,6 +9,7 @@ CONFIG_FIT=y + CONFIG_BOOTDELAY=3 + CONFIG_USE_BOOTARGS=y + CONFIG_BOOTARGS="console=ttyAMA0 loglevel=9 ip=dhcp earlyprintk" ++CONFIG_LOGLEVEL=7 + # CONFIG_DISPLAY_CPUINFO is not set + # CONFIG_DISPLAY_BOARDINFO is not set + CONFIG_HUSH_PARSER=y +@@ -44,6 +45,10 @@ CONFIG_DM_SERIAL=y + CONFIG_USB=y + CONFIG_USB_ISP1760=y + CONFIG_USB_STORAGE=y ++CONFIG_ARM_FFA_TRANSPORT=y ++CONFIG_EFI_MM_COMM_TEE=y ++# CONFIG_OPTEE is not set ++# CONFIG_GENERATE_SMBIOS_TABLE is not set + # CONFIG_HEXDUMP is not set + CONFIG_EFI_RUNTIME_UPDATE_CAPSULE=y + CONFIG_EFI_CAPSULE_ON_DISK=y +diff --git a/include/configs/corstone1000.h b/include/configs/corstone1000.h +index 5e22e075ad..8014b2f688 100644 +--- a/include/configs/corstone1000.h ++++ b/include/configs/corstone1000.h +@@ -12,6 +12,20 @@ + #ifndef __CORSTONE1000_H + #define __CORSTONE1000_H + ++#include <linux/sizes.h> ++ ++/* MM SP UUID binary data (little-endian format) */ ++#define MM_SP_UUID_DATA \ ++ 0xed, 0x32, 0xd5, 0x33, \ ++ 0x99, 0xe6, 0x42, 0x09, \ ++ 0x9c, 0xc0, 0x2d, 0x72, \ ++ 0xcd, 0xd9, 0x98, 0xa7 ++ ++#define FFA_SHARED_MM_BUFFER_SIZE SZ_4K /* 4 KB */ ++ ++/* shared buffer physical address used for communication between u-boot and the MM SP */ ++#define FFA_SHARED_MM_BUFFER_ADDR (0x023F8000) ++ + #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + 0x03f00000) + #define CONFIG_SKIP_LOWLEVEL_INIT + +-- +2.17.1 + diff --git a/meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend b/meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend index c75eec3..c9bcbe1 100644 --- a/meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend +++ b/meta-arm-bsp/recipes-bsp/u-boot/u-boot_%.bbappend @@ -27,7 +27,12 @@ SRC_URI:append:corstone1000 = " \ file://0015-arm-dts-add-initial-devicetree-corstone1000-mps3.patch \ file://0016-arm-corstone1000-adding-PSCI-device-tree-node.patch \ file://0017-arm-corstone1000-amend-kernel-bootargs-with-ip-dhcp-.patch \ - " + file://0018-arm_ffa-introducing-Arm-FF-A-low-level-driver.patch \ + file://0019-arm_ffa-introducing-armffa-command.patch \ + file://0020-arm_ffa-introducing-test-module-for-UCLASS_FFA.patch \ + file://0021-arm_ffa-introducing-MM-communication-with-FF-A.patch \ + file://0022-arm_ffa-corstone1000-enable-FF-A-and-MM-support.patch \ + " # # FVP BASE

[2/5] arm-bsp/u-boot: corstone1000: introducing Arm FF-A and MM support

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