Provide armffa command showcasing the use of the FF-A driver
The armffa command allows to query secure partitions data from the secure world and exchanging messages with the partitions using 64-bit FF-A direct messaging.
Signed-off-by: Abdellatif El Khlifi abdellatif.elkhlifi@arm.com Cc: Tom Rini trini@konsulko.com Cc: Simon Glass sjg@chromium.org Cc: Ilias Apalodimas ilias.apalodimas@linaro.org Cc: Jens Wiklander jens.wiklander@linaro.org
---
Changelog: ===============
v7:
* adapt do_ffa_dev_list() following the recent update on uclass_first_device/uclass_next_device functions (they return void now) * set armffa command to use 64-bit direct messaging
v4:
* remove pattern data in do_ffa_msg_send_direct_req
v3:
* use the new driver interfaces (partition_info_get, sync_send_receive) in armffa command
v2:
* replace use of ffa_helper_init_device function by ffa_helper_bus_discover
v1:
* introduce armffa command
MAINTAINERS | 1 + cmd/Kconfig | 10 ++ cmd/Makefile | 2 + cmd/armffa.c | 239 +++++++++++++++++++++++++++++++ drivers/firmware/arm-ffa/Kconfig | 1 + 5 files changed, 253 insertions(+) create mode 100644 cmd/armffa.c
diff --git a/MAINTAINERS b/MAINTAINERS index 450b5725ce..e86ba068ad 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -266,6 +266,7 @@ F: configs/cortina_presidio-asic-pnand_defconfig ARM FF-A M: Abdellatif El Khlifi abdellatif.elkhlifi@arm.com S: Maintained +F: cmd/armffa.c F: doc/arch/arm64.ffa.rst F: drivers/firmware/arm-ffa/ F: include/arm_ffa.h diff --git a/cmd/Kconfig b/cmd/Kconfig index 3f6bc70d43..16505361d5 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -918,6 +918,16 @@ 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 ca9ed1054d..adb4728b65 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..964a5e1b34 --- /dev/null +++ b/cmd/armffa.c @@ -0,0 +1,239 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2022 ARM Limited + * Abdellatif El Khlifi abdellatif.elkhlifi@arm.com + */ + +#include <arm_ffa.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 partition_info_get operation + * 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[]) +{ + u32 count = 0, size = 0; + int ret; + struct ffa_partition_info *parts_info; + u32 info_idx; + + if (argc != 1) + return -EINVAL; + + /* Mode 1: getting the number of secure partitions */ + ret = ffa_bus_ops_get()->partition_info_get(argv[0], &count, NULL); + if (ret != 0) { + 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 + */ + + ffa_info("Pre-allocating %d partition(s) info structures", count); + + parts_info = calloc(count, sizeof(struct ffa_partition_info)); + if (!parts_info) + return -EINVAL; + + size = count * sizeof(struct ffa_partition_info); + + /* + * ask the driver to fill the buffer with the SPs info + */ + + ret = ffa_bus_ops_get()->partition_info_get(argv[0], &size, parts_info); + if (ret != 0) { + 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 sync_send_receive operation + * 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_send_direct_data msg = { + .data0 = 0xaaaaaaaa, + .data1 = 0xbbbbbbbb, + .data2 = 0xcccccccc, + .data3 = 0xdddddddd, + .data4 = 0xeeeeeeee, + }; + 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; + } + + ret = ffa_bus_ops_get()->sync_send_receive(part_id, &msg, 1); + if (ret == 0) { + u8 cnt; + + ffa_info("SP response:\n[LSB]"); + for (cnt = 0; + cnt < sizeof(struct ffa_send_direct_data) / sizeof(u64); + cnt++) + ffa_info("0x%llx", ((u64 *)&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; + + ffa_info("arm_ffa uclass entries:"); + + for (i = 0, uclass_first_device(UCLASS_FFA, &dev); + dev; + uclass_next_device(&dev), i++) { + 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 0; +} + +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_bus_discover(); + if (ret != 0) + return cmd_process_error(cmdtp, ret); + + if (!ffa_bus_ops_get()) + return -EINVAL; + + 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"); diff --git a/drivers/firmware/arm-ffa/Kconfig b/drivers/firmware/arm-ffa/Kconfig index e4914b9bc7..be4df89d23 100644 --- a/drivers/firmware/arm-ffa/Kconfig +++ b/drivers/firmware/arm-ffa/Kconfig @@ -4,6 +4,7 @@ config ARM_FFA_TRANSPORT bool "Enable Arm Firmware Framework for Armv8-A driver" depends on DM && ARM64 select ARM_SMCCC + select CMD_ARMFFA select LIB_UUID select DEVRES help