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Message-Id: <1572378065-4490-18-git-send-email-eberman@codeaurora.org>
Date: Tue, 29 Oct 2019 12:41:05 -0700
From: Elliot Berman <eberman@...eaurora.org>
To: bjorn.andersson@...aro.org, saipraka@...eaurora.org,
agross@...nel.org
Cc: tsoni@...eaurora.org, sidgup@...eaurora.org,
psodagud@...eaurora.org, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org,
Elliot Berman <eberman@...eaurora.org>
Subject: [RFC 17/17] firmware: qcom_scm: Rename -64 -> -smc, remove -32
- Rename qcom_scm-64.c to qcom_scm-smc as it supports SMC-based calling conventions
for 32 and 64-bit targets
- Remove qcom_scm-32.c as it has been superceded by qcom_scm-smc.c
- Update Kconfig to select QCOM_SCM_TRANSPORT_SMC on ARM and ARM64
targets
Signed-off-by: Elliot Berman <eberman@...eaurora.org>
---
drivers/firmware/Kconfig | 18 +-
drivers/firmware/Makefile | 4 +-
drivers/firmware/qcom_scm-32.c | 660 ----------------------------
drivers/firmware/qcom_scm-64.c | 938 ----------------------------------------
drivers/firmware/qcom_scm-smc.c | 938 ++++++++++++++++++++++++++++++++++++++++
5 files changed, 950 insertions(+), 1608 deletions(-)
delete mode 100644 drivers/firmware/qcom_scm-32.c
delete mode 100644 drivers/firmware/qcom_scm-64.c
create mode 100644 drivers/firmware/qcom_scm-smc.c
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index e40a77b..ad477ca 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -236,16 +236,20 @@ config INTEL_STRATIX10_RSU
config QCOM_SCM
bool
- depends on ARM || ARM64
+ depends on QCOM_SCM_TRANSPORT_SMC
select RESET_CONTROLLER
+ help
+ This option enables support for communicating with
+ Qualcomm secure worlds.
-config QCOM_SCM_32
- def_bool y
- depends on QCOM_SCM && ARM
-
-config QCOM_SCM_64
+config QCOM_SCM_TRANSPORT_SMC
def_bool y
- depends on QCOM_SCM && ARM64
+ depends on ARM || ARM64
+ help
+ This option enables support for communicating with
+ Qualcomm secure worlds via the SMC instruction, using
+ either ARM SMCCC or legacy calling convention by querying
+ the Qualcomm secure world.
config QCOM_SCM_DOWNLOAD_MODE_DEFAULT
bool "Qualcomm download mode enabled by default"
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index 3fcb919..fc250f0 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -18,9 +18,7 @@ obj-$(CONFIG_FIRMWARE_MEMMAP) += memmap.o
obj-$(CONFIG_RASPBERRYPI_FIRMWARE) += raspberrypi.o
obj-$(CONFIG_FW_CFG_SYSFS) += qemu_fw_cfg.o
obj-$(CONFIG_QCOM_SCM) += qcom_scm.o
-obj-$(CONFIG_QCOM_SCM_64) += qcom_scm-64.o
-obj-$(CONFIG_QCOM_SCM_32) += qcom_scm-32.o
-CFLAGS_qcom_scm-32.o :=$(call as-instr,.arch armv7-a\n.arch_extension sec,-DREQUIRES_SEC=1) -march=armv7-a
+obj-$(CONFIG_QCOM_SCM_TRANSPORT_SMC) += qcom_scm-smc.o
obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o
obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o
obj-$(CONFIG_TURRIS_MOX_RWTM) += turris-mox-rwtm.o
diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
deleted file mode 100644
index a33fdf1..0000000
--- a/drivers/firmware/qcom_scm-32.c
+++ /dev/null
@@ -1,660 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2010,2015,2019 The Linux Foundation. All rights reserved.
- * Copyright (C) 2015 Linaro Ltd.
- */
-
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/qcom_scm.h>
-#include <linux/arm-smccc.h>
-#include <linux/dma-mapping.h>
-
-#include "qcom_scm.h"
-
-#define QCOM_SCM_FLAG_COLDBOOT_CPU0 0x00
-#define QCOM_SCM_FLAG_COLDBOOT_CPU1 0x01
-#define QCOM_SCM_FLAG_COLDBOOT_CPU2 0x08
-#define QCOM_SCM_FLAG_COLDBOOT_CPU3 0x20
-
-#define QCOM_SCM_FLAG_WARMBOOT_CPU0 0x04
-#define QCOM_SCM_FLAG_WARMBOOT_CPU1 0x02
-#define QCOM_SCM_FLAG_WARMBOOT_CPU2 0x10
-#define QCOM_SCM_FLAG_WARMBOOT_CPU3 0x40
-
-struct qcom_scm_entry {
- int flag;
- void *entry;
-};
-
-static struct qcom_scm_entry qcom_scm_wb[] = {
- { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU0 },
- { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU1 },
- { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU2 },
- { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU3 },
-};
-
-static DEFINE_MUTEX(qcom_scm_lock);
-
-#define MAX_QCOM_SCM_ARGS 10
-#define MAX_QCOM_SCM_RETS 3
-
-enum qcom_scm_arg_types {
- QCOM_SCM_VAL,
- QCOM_SCM_RO,
- QCOM_SCM_RW,
- QCOM_SCM_BUFVAL,
-};
-
-#define QCOM_SCM_ARGS_IMPL(num, a, b, c, d, e, f, g, h, i, j, ...) (\
- (((a) & 0x3) << 4) | \
- (((b) & 0x3) << 6) | \
- (((c) & 0x3) << 8) | \
- (((d) & 0x3) << 10) | \
- (((e) & 0x3) << 12) | \
- (((f) & 0x3) << 14) | \
- (((g) & 0x3) << 16) | \
- (((h) & 0x3) << 18) | \
- (((i) & 0x3) << 20) | \
- (((j) & 0x3) << 22) | \
- ((num) & 0xf))
-
-#define QCOM_SCM_ARGS(...) QCOM_SCM_ARGS_IMPL(__VA_ARGS__, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
-
-/**
- * struct qcom_scm_desc
- * @arginfo: Metadata describing the arguments in args[]
- * @args: The array of arguments for the secure syscall
- * @res: The values returned by the secure syscall
- */
-struct qcom_scm_desc {
- u32 svc;
- u32 cmd;
- u32 arginfo;
- u64 args[MAX_QCOM_SCM_ARGS];
- u64 res[MAX_QCOM_SCM_RETS];
- u32 owner;
-};
-struct arm_smccc_args {
- unsigned long a[8];
-};
-
-#define LEGACY_FUNCNUM(s, c) (((s) << 10) | ((c) & 0x3ff))
-
-/**
- * struct legacy_command - one SCM command buffer
- * @len: total available memory for command and response
- * @buf_offset: start of command buffer
- * @resp_hdr_offset: start of response buffer
- * @id: command to be executed
- * @buf: buffer returned from legacy_get_command_buffer()
- *
- * An SCM command is laid out in memory as follows:
- *
- * ------------------- <--- struct legacy_command
- * | command header |
- * ------------------- <--- legacy_get_command_buffer()
- * | command buffer |
- * ------------------- <--- struct legacy_response and
- * | response header | legacy_command_to_response()
- * ------------------- <--- legacy_get_response_buffer()
- * | response buffer |
- * -------------------
- *
- * There can be arbitrary padding between the headers and buffers so
- * you should always use the appropriate qcom_scm_get_*_buffer() routines
- * to access the buffers in a safe manner.
- */
-struct legacy_command {
- __le32 len;
- __le32 buf_offset;
- __le32 resp_hdr_offset;
- __le32 id;
- __le32 buf[0];
-};
-
-/**
- * struct legacy_response - one SCM response buffer
- * @len: total available memory for response
- * @buf_offset: start of response data relative to start of legacy_response
- * @is_complete: indicates if the command has finished processing
- */
-struct legacy_response {
- __le32 len;
- __le32 buf_offset;
- __le32 is_complete;
-};
-
-/**
- * legacy_command_to_response() - Get a pointer to a legacy_response
- * @cmd: command
- *
- * Returns a pointer to a response for a command.
- */
-static inline struct legacy_response *legacy_command_to_response(
- const struct legacy_command *cmd)
-{
- return (void *)cmd + le32_to_cpu(cmd->resp_hdr_offset);
-}
-
-/**
- * legacy_get_command_buffer() - Get a pointer to a command buffer
- * @cmd: command
- *
- * Returns a pointer to the command buffer of a command.
- */
-static inline void *legacy_get_command_buffer(const struct legacy_command *cmd)
-{
- return (void *)cmd->buf;
-}
-
-/**
- * legacy_get_response_buffer() - Get a pointer to a response buffer
- * @rsp: response
- *
- * Returns a pointer to a response buffer of a response.
- */
-static inline void *legacy_get_response_buffer(const struct legacy_response *rsp)
-{
- return (void *)rsp + le32_to_cpu(rsp->buf_offset);
-}
-
-static void __qcom_scm_call_do(const struct arm_smccc_args *smc,
- struct arm_smccc_res *res)
-{
- do {
- arm_smccc_smc(smc->a[0], smc->a[1], smc->a[2], smc->a[3],
- smc->a[4], smc->a[5], smc->a[6], smc->a[7], res);
- } while (res->a0 == QCOM_SCM_INTERRUPTED);
-}
-
-/**
- * qcom_scm_call() - Send an SCM command
- * @dev: struct device
- * @svc_id: service identifier
- * @cmd_id: command identifier
- * @cmd_buf: command buffer
- * @cmd_len: length of the command buffer
- * @resp_buf: response buffer
- * @resp_len: length of the response buffer
- *
- * Sends a command to the SCM and waits for the command to finish processing.
- *
- * A note on cache maintenance:
- * Note that any buffers that are expected to be accessed by the secure world
- * must be flushed before invoking qcom_scm_call and invalidated in the cache
- * immediately after qcom_scm_call returns. Cache maintenance on the command
- * and response buffers is taken care of by qcom_scm_call; however, callers are
- * responsible for any other cached buffers passed over to the secure world.
- */
-static int qcom_scm_call(struct device *dev, struct qcom_scm_desc *desc)
-{
- int arglen = desc->arginfo & 0xf;
- int ret = 0, context_id;
- size_t i;
- struct legacy_command *cmd;
- struct legacy_response *rsp;
- struct arm_smccc_args smc = {0};
- struct arm_smccc_res res;
- const size_t cmd_len = arglen * sizeof(__le32);
- const size_t resp_len = MAX_QCOM_SCM_RETS * sizeof(__le32);
- size_t alloc_len = sizeof(*cmd) + cmd_len + sizeof(*rsp) + resp_len;
- dma_addr_t cmd_phys;
- __le32 *arg_buf;
- __le32 *res_buf;
-
- cmd = kzalloc(PAGE_ALIGN(alloc_len), GFP_KERNEL);
- if (!cmd)
- return -ENOMEM;
-
- cmd->len = cpu_to_le32(alloc_len);
- cmd->buf_offset = cpu_to_le32(sizeof(*cmd));
- cmd->resp_hdr_offset = cpu_to_le32(sizeof(*cmd) + cmd_len);
- cmd->id = cpu_to_le32(LEGACY_FUNCNUM(desc->svc, desc->cmd));
-
- arg_buf = legacy_get_command_buffer(cmd);
- for (i = 0; i < arglen; i++)
- arg_buf[i] = cpu_to_le32(desc->args[i]);
-
- rsp = legacy_command_to_response(cmd);
-
- cmd_phys = dma_map_single(dev, cmd, alloc_len, DMA_TO_DEVICE);
- if (dma_mapping_error(dev, cmd_phys)) {
- kfree(cmd);
- return -ENOMEM;
- }
-
- smc.a[0] = 1;
- smc.a[1] = (unsigned long)&context_id;
- smc.a[2] = cmd_phys;
-
- mutex_lock(&qcom_scm_lock);
- __qcom_scm_call_do(&smc, &res);
- if (res.a0 < 0)
- ret = qcom_scm_remap_error(res.a0);
- mutex_unlock(&qcom_scm_lock);
- if (ret)
- goto out;
-
- do {
- dma_sync_single_for_cpu(dev, cmd_phys + sizeof(*cmd) + cmd_len,
- sizeof(*rsp), DMA_FROM_DEVICE);
- } while (!rsp->is_complete);
-
- dma_sync_single_for_cpu(dev, cmd_phys + sizeof(*cmd) + cmd_len +
- le32_to_cpu(rsp->buf_offset),
- resp_len, DMA_FROM_DEVICE);
-
- res_buf = legacy_get_response_buffer(rsp);
- for (i = 0; i < MAX_QCOM_SCM_RETS; i++)
- desc->res[i] = le32_to_cpu(res_buf[i]);
-out:
- dma_unmap_single(dev, cmd_phys, alloc_len, DMA_TO_DEVICE);
- kfree(cmd);
- return ret;
-}
-
-#define LEGACY_ATOMIC_N_REG_ARGS 5
-#define LEGACY_ATOMIC_FIRST_REG_IDX 2
-#define LEGACY_CLASS_REGISTER (0x2 << 8)
-#define LEGACY_MASK_IRQS BIT(5)
-#define LEGACY_ATOMIC(svc, cmd, n) ((LEGACY_FUNCNUM(svc, cmd) << 12) | \
- LEGACY_CLASS_REGISTER | \
- LEGACY_MASK_IRQS | \
- (n & 0xf))
-
-/**
- * qcom_scm_call_atomic() - Send an atomic SCM command with up to 5 arguments
- * and 3 return values
- *
- * This shall only be used with commands that are guaranteed to be
- * uninterruptable, atomic and SMP safe.
- */
-static int qcom_scm_call_atomic(struct device *dev, struct qcom_scm_desc *desc)
-{
- int context_id;
- struct arm_smccc_args smc = {0};
- struct arm_smccc_res res;
- size_t i, arglen = desc->arginfo & 0xf;
-
- BUG_ON(arglen > LEGACY_ATOMIC_N_REG_ARGS);
-
- smc.a[0] = LEGACY_ATOMIC(desc->svc, desc->cmd, arglen);
- smc.a[1] = (unsigned long)&context_id;
-
- for(i = 0; i < arglen; i++)
- smc.a[i + LEGACY_ATOMIC_FIRST_REG_IDX] = desc->args[i];
-
- arm_smccc_smc(smc.a[0], smc.a[1], smc.a[2], smc.a[3],
- smc.a[4], smc.a[5], smc.a[6], smc.a[7], &res);
-
- desc->res[0] = res.a1;
- desc->res[1] = res.a2;
- desc->res[2] = res.a3;
-
- return res.a0;
-}
-
-/**
- * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
- * @entry: Entry point function for the cpus
- * @cpus: The cpumask of cpus that will use the entry point
- *
- * Set the cold boot address of the cpus. Any cpu outside the supported
- * range would be removed from the cpu present mask.
- */
-int __qcom_scm_set_cold_boot_addr(struct device *dev, void *entry,
- const cpumask_t *cpus)
-{
- int flags = 0;
- int cpu;
- int scm_cb_flags[] = {
- QCOM_SCM_FLAG_COLDBOOT_CPU0,
- QCOM_SCM_FLAG_COLDBOOT_CPU1,
- QCOM_SCM_FLAG_COLDBOOT_CPU2,
- QCOM_SCM_FLAG_COLDBOOT_CPU3,
- };
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_SET_ADDR,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- if (!cpus || (cpus && cpumask_empty(cpus)))
- return -EINVAL;
-
- for_each_cpu(cpu, cpus) {
- if (cpu < ARRAY_SIZE(scm_cb_flags))
- flags |= scm_cb_flags[cpu];
- else
- set_cpu_present(cpu, false);
- }
-
- desc.args[0] = flags;
- desc.args[1] = virt_to_phys(entry);
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- return qcom_scm_call_atomic(dev, &desc);
-}
-
-/**
- * qcom_scm_set_warm_boot_addr() - Set the warm boot address for cpus
- * @entry: Entry point function for the cpus
- * @cpus: The cpumask of cpus that will use the entry point
- *
- * Set the Linux entry point for the SCM to transfer control to when coming
- * out of a power down. CPU power down may be executed on cpuidle or hotplug.
- */
-int __qcom_scm_set_warm_boot_addr(struct device *dev, void *entry,
- const cpumask_t *cpus)
-{
- int ret;
- int flags = 0;
- int cpu;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_SET_ADDR,
- };
-
- /*
- * Reassign only if we are switching from hotplug entry point
- * to cpuidle entry point or vice versa.
- */
- for_each_cpu(cpu, cpus) {
- if (entry == qcom_scm_wb[cpu].entry)
- continue;
- flags |= qcom_scm_wb[cpu].flag;
- }
-
- /* No change in entry function */
- if (!flags)
- return 0;
-
- desc.args[0] = virt_to_phys(entry);
- desc.args[1] = flags;
- ret = qcom_scm_call(dev, &desc);
- if (!ret) {
- for_each_cpu(cpu, cpus)
- qcom_scm_wb[cpu].entry = entry;
- }
-
- return ret;
-}
-
-/**
- * qcom_scm_cpu_power_down() - Power down the cpu
- * @flags - Flags to flush cache
- *
- * This is an end point to power down cpu. If there was a pending interrupt,
- * the control would return from this function, otherwise, the cpu jumps to the
- * warm boot entry point set for this cpu upon reset.
- */
-void __qcom_scm_cpu_power_down(struct device *dev, u32 flags)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_TERMINATE_PC,
- .args[0] = flags & QCOM_SCM_FLUSH_FLAG_MASK,
- .arginfo = QCOM_SCM_ARGS(1),
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- qcom_scm_call_atomic(dev, &desc);
-}
-
-int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_SET_REMOTE_STATE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = state;
- desc.args[1] = id;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_SET_DLOAD_MODE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = QCOM_SCM_BOOT_SET_DLOAD_MODE;
- desc.args[1] = enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- return qcom_scm_call_atomic(dev, &desc);
-}
-
-bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_IS_SUPPORTED,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = peripheral;
- desc.arginfo = QCOM_SCM_ARGS(1);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? false : !!desc.res[0];
-}
-
-int __qcom_scm_pas_init_image(struct device *dev, u32 peripheral,
- dma_addr_t metadata_phys)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_INIT_IMAGE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = peripheral;
- desc.args[1] = metadata_phys;
- desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_VAL, QCOM_SCM_RW);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_pas_mem_setup(struct device *dev, u32 peripheral,
- phys_addr_t addr, phys_addr_t size)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_MEM_SETUP,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = peripheral;
- desc.args[1] = addr;
- desc.args[2] = size;
- desc.arginfo = QCOM_SCM_ARGS(3);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_pas_auth_and_reset(struct device *dev, u32 peripheral)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_AUTH_AND_RESET,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_pas_shutdown(struct device *dev, u32 peripheral)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_SHUTDOWN,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = peripheral;
- desc.arginfo = QCOM_SCM_ARGS(1);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_MSS_RESET,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = reset;
- desc.args[1] = 0;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr,
- unsigned int *val)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_IO,
- .cmd = QCOM_SCM_IO_READ,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = addr;
- desc.arginfo = QCOM_SCM_ARGS(1);
-
- ret = qcom_scm_call_atomic(dev, &desc);
- if (ret >= 0)
- *val = desc.res[0];
-
- return ret < 0 ? ret : 0;
-
-}
-
-int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_IO,
- .cmd = QCOM_SCM_IO_WRITE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = addr;
- desc.args[1] = val;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- return qcom_scm_call_atomic(dev, &desc);
-}
-
-int __qcom_scm_is_call_available(struct device *dev, u32 svc_id, u32 cmd_id)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_INFO,
- .cmd = QCOM_INFO_IS_CALL_AVAIL,
- .args[0] = (svc_id << 10) | cmd_id,
- .arginfo = QCOM_SCM_ARGS(1),
- };
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id,
- u32 spare)
-{
- return -ENODEV;
-}
-
-int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
- size_t *size)
-{
- return -ENODEV;
-}
-
-int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
- u32 spare)
-{
- return -ENODEV;
-}
-
-int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
- size_t mem_sz, phys_addr_t src, size_t src_sz,
- phys_addr_t dest, size_t dest_sz)
-{
- return -ENODEV;
-}
-
-int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
- u32 req_cnt, u32 *resp)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_HDCP,
- .cmd = QCOM_SCM_HDCP_INVOKE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT)
- return -ERANGE;
-
- desc.args[0] = req[0].addr;
- desc.args[1] = req[0].val;
- desc.args[2] = req[1].addr;
- desc.args[3] = req[1].val;
- desc.args[4] = req[2].addr;
- desc.args[5] = req[2].val;
- desc.args[6] = req[3].addr;
- desc.args[7] = req[3].val;
- desc.args[8] = req[4].addr;
- desc.args[9] = req[4].val;
- desc.arginfo = QCOM_SCM_ARGS(req_cnt * 2);
-
- ret = qcom_scm_call(dev, &desc);
- *resp = desc.res[0];
-
- return ret;
-}
-
-int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev, bool enable)
-{
- return -ENODEV;
-}
-
-void __qcom_scm_init(void)
-{
-}
\ No newline at end of file
diff --git a/drivers/firmware/qcom_scm-64.c b/drivers/firmware/qcom_scm-64.c
deleted file mode 100644
index 18f0bf5..0000000
--- a/drivers/firmware/qcom_scm-64.c
+++ /dev/null
@@ -1,938 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2015,2019 The Linux Foundation. All rights reserved.
- */
-
-#include <linux/io.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/qcom_scm.h>
-#include <linux/arm-smccc.h>
-#include <linux/dma-mapping.h>
-
-#include "qcom_scm.h"
-
-#define MAX_QCOM_SCM_ARGS 10
-#define MAX_QCOM_SCM_RETS 3
-
-enum qcom_scm_arg_types {
- QCOM_SCM_VAL,
- QCOM_SCM_RO,
- QCOM_SCM_RW,
- QCOM_SCM_BUFVAL,
-};
-
-#define QCOM_SCM_ARGS_IMPL(num, a, b, c, d, e, f, g, h, i, j, ...) (\
- (((a) & 0x3) << 4) | \
- (((b) & 0x3) << 6) | \
- (((c) & 0x3) << 8) | \
- (((d) & 0x3) << 10) | \
- (((e) & 0x3) << 12) | \
- (((f) & 0x3) << 14) | \
- (((g) & 0x3) << 16) | \
- (((h) & 0x3) << 18) | \
- (((i) & 0x3) << 20) | \
- (((j) & 0x3) << 22) | \
- ((num) & 0xf))
-
-#define QCOM_SCM_ARGS(...) QCOM_SCM_ARGS_IMPL(__VA_ARGS__, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
-
-/**
- * struct qcom_scm_desc
- * @arginfo: Metadata describing the arguments in args[]
- * @args: The array of arguments for the secure syscall
- * @res: The values returned by the secure syscall
- */
-struct qcom_scm_desc {
- u32 svc;
- u32 cmd;
- u32 arginfo;
- u64 args[MAX_QCOM_SCM_ARGS];
- u64 res[MAX_QCOM_SCM_RETS];
- u32 owner;
-};
-
-struct arm_smccc_args {
- unsigned long a[8];
-};
-
-enum qcom_smc_convention {
- SMC_CONVENTION_UNKNOWN,
- SMC_CONVENTION_LEGACY,
- SMC_CONVENTION_ARM_32,
- SMC_CONVENTION_ARM_64,
-};
-
-static enum qcom_smc_convention qcom_smc_convention = SMC_CONVENTION_UNKNOWN;
-static DEFINE_MUTEX(qcom_scm_lock);
-
-#define QCOM_SCM_EBUSY_WAIT_MS 30
-#define QCOM_SCM_EBUSY_MAX_RETRY 20
-
-#define SMCCC_FUNCNUM(s, c) ((((s) & 0xFF) << 8) | ((c) & 0xFF))
-#define SMCCC_N_REG_ARGS 4
-#define SMCCC_FIRST_REG_IDX 2
-#define SMCCC_N_EXT_ARGS (MAX_QCOM_SCM_ARGS - SMCCC_N_REG_ARGS + 1)
-#define SMCCC_LAST_REG_IDX (SMCCC_FIRST_REG_IDX + SMCCC_N_REG_ARGS - 1)
-
-static void __qcom_scm_call_do_quirk(const struct arm_smccc_args *smc,
- struct arm_smccc_res *res)
-{
- unsigned long a0 = smc->a[0];
- struct arm_smccc_quirk quirk = { .id = ARM_SMCCC_QUIRK_QCOM_A6 };
-
- quirk.state.a6 = 0;
-
- do {
- arm_smccc_smc_quirk(a0, smc->a[1], smc->a[2], smc->a[3],
- smc->a[4], smc->a[5], quirk.state.a6,
- smc->a[7], res, &quirk);
-
- if (res->a0 == QCOM_SCM_INTERRUPTED)
- a0 = res->a0;
-
- } while (res->a0 == QCOM_SCM_INTERRUPTED);
-}
-
-static int qcom_scm_call_smccc(struct device *dev,
- struct qcom_scm_desc *desc, bool atomic)
-{
- int arglen = desc->arginfo & 0xf;
- int i;
- dma_addr_t args_phys = 0;
- void *args_virt = NULL;
- size_t alloc_len;
- gfp_t flag = atomic ? GFP_ATOMIC : GFP_KERNEL;
- struct arm_smccc_res res;
- struct arm_smccc_args smc = {0};
-
- smc.a[0] = ARM_SMCCC_CALL_VAL(
- atomic ? ARM_SMCCC_FAST_CALL : ARM_SMCCC_STD_CALL,
- (qcom_smc_convention == SMC_CONVENTION_ARM_64) ?
- ARM_SMCCC_SMC_64 :
- ARM_SMCCC_SMC_32,
- desc->owner,
- SMCCC_FUNCNUM(desc->svc, desc->cmd));
- smc.a[1] = desc->arginfo;
- for (i = 0; i < SMCCC_N_REG_ARGS; i++)
- smc.a[i + SMCCC_FIRST_REG_IDX] = desc->args[i];
-
- if (unlikely(arglen > SMCCC_N_REG_ARGS)) {
- alloc_len = SMCCC_N_EXT_ARGS * sizeof(u64);
- args_virt = kzalloc(PAGE_ALIGN(alloc_len), flag);
-
- if (!args_virt)
- return -ENOMEM;
-
- if (qcom_smc_convention == SMC_CONVENTION_ARM_32) {
- __le32 *args = args_virt;
-
- for (i = 0; i < SMCCC_N_EXT_ARGS; i++)
- args[i] = cpu_to_le32(desc->args[i +
- SMCCC_N_REG_ARGS - 1]);
- } else {
- __le64 *args = args_virt;
-
- for (i = 0; i < SMCCC_N_EXT_ARGS; i++)
- args[i] = cpu_to_le64(desc->args[i +
- SMCCC_N_REG_ARGS - 1]);
- }
-
- args_phys = dma_map_single(dev, args_virt, alloc_len,
- DMA_TO_DEVICE);
-
- if (dma_mapping_error(dev, args_phys)) {
- kfree(args_virt);
- return -ENOMEM;
- }
-
- smc.a[SMCCC_LAST_REG_IDX] = args_phys;
- }
-
- if (atomic) {
- __qcom_scm_call_do_quirk(&smc, &res);
- } else {
- int retry_count = 0;
-
- do {
- mutex_lock(&qcom_scm_lock);
-
- __qcom_scm_call_do_quirk(&smc, &res);
-
- mutex_unlock(&qcom_scm_lock);
-
- if (res.a0 == QCOM_SCM_V2_EBUSY) {
- if (retry_count++ > QCOM_SCM_EBUSY_MAX_RETRY)
- break;
- msleep(QCOM_SCM_EBUSY_WAIT_MS);
- }
- } while (res.a0 == QCOM_SCM_V2_EBUSY);
- }
-
- if (args_virt) {
- dma_unmap_single(dev, args_phys, alloc_len, DMA_TO_DEVICE);
- kfree(args_virt);
- }
-
- if (res.a0 < 0)
- return qcom_scm_remap_error(res.a0);
-
- return 0;
-}
-
-#define LEGACY_FUNCNUM(s, c) (((s) << 10) | ((c) & 0x3ff))
-
-/**
- * struct legacy_command - one SCM command buffer
- * @len: total available memory for command and response
- * @buf_offset: start of command buffer
- * @resp_hdr_offset: start of response buffer
- * @id: command to be executed
- * @buf: buffer returned from legacy_get_command_buffer()
- *
- * An SCM command is laid out in memory as follows:
- *
- * ------------------- <--- struct legacy_command
- * | command header |
- * ------------------- <--- legacy_get_command_buffer()
- * | command buffer |
- * ------------------- <--- struct legacy_response and
- * | response header | legacy_command_to_response()
- * ------------------- <--- legacy_get_response_buffer()
- * | response buffer |
- * -------------------
- *
- * There can be arbitrary padding between the headers and buffers so
- * you should always use the appropriate qcom_scm_get_*_buffer() routines
- * to access the buffers in a safe manner.
- */
-struct legacy_command {
- __le32 len;
- __le32 buf_offset;
- __le32 resp_hdr_offset;
- __le32 id;
- __le32 buf[0];
-};
-
-/**
- * struct legacy_response - one SCM response buffer
- * @len: total available memory for response
- * @buf_offset: start of response data relative to start of legacy_response
- * @is_complete: indicates if the command has finished processing
- */
-struct legacy_response {
- __le32 len;
- __le32 buf_offset;
- __le32 is_complete;
-};
-
-/**
- * legacy_command_to_response() - Get a pointer to a legacy_response
- * @cmd: command
- *
- * Returns a pointer to a response for a command.
- */
-static inline struct legacy_response *legacy_command_to_response(
- const struct legacy_command *cmd)
-{
- return (void *)cmd + le32_to_cpu(cmd->resp_hdr_offset);
-}
-
-/**
- * legacy_get_command_buffer() - Get a pointer to a command buffer
- * @cmd: command
- *
- * Returns a pointer to the command buffer of a command.
- */
-static inline void *legacy_get_command_buffer(const struct legacy_command *cmd)
-{
- return (void *)cmd->buf;
-}
-
-/**
- * legacy_get_response_buffer() - Get a pointer to a response buffer
- * @rsp: response
- *
- * Returns a pointer to a response buffer of a response.
- */
-static inline void *legacy_get_response_buffer(const struct legacy_response *rsp)
-{
- return (void *)rsp + le32_to_cpu(rsp->buf_offset);
-}
-
-static void __qcom_scm_call_do(const struct arm_smccc_args *smc,
- struct arm_smccc_res *res)
-{
- do {
- arm_smccc_smc(smc->a[0], smc->a[1], smc->a[2], smc->a[3],
- smc->a[4], smc->a[5], smc->a[6], smc->a[7], res);
- } while (res->a0 == QCOM_SCM_INTERRUPTED);
-}
-
-/**
- * qcom_scm_call_legacy() - Send an SCM command
- * @dev: struct device
- * @svc_id: service identifier
- * @cmd_id: command identifier
- * @cmd_buf: command buffer
- * @cmd_len: length of the command buffer
- * @resp_buf: response buffer
- * @resp_len: length of the response buffer
- *
- * Sends a command to the SCM and waits for the command to finish processing.
- *
- * A note on cache maintenance:
- * Note that any buffers that are expected to be accessed by the secure world
- * must be flushed before invoking qcom_scm_call and invalidated in the cache
- * immediately after qcom_scm_call returns. Cache maintenance on the command
- * and response buffers is taken care of by qcom_scm_call; however, callers are
- * responsible for any other cached buffers passed over to the secure world.
- */
-static int qcom_scm_call_legacy(struct device *dev, struct qcom_scm_desc *desc)
-{
- int arglen = desc->arginfo & 0xf;
- int ret = 0, context_id;
- size_t i;
- struct legacy_command *cmd;
- struct legacy_response *rsp;
- struct arm_smccc_args smc = {0};
- struct arm_smccc_res res;
- const size_t cmd_len = arglen * sizeof(__le32);
- const size_t resp_len = MAX_QCOM_SCM_RETS * sizeof(__le32);
- size_t alloc_len = sizeof(*cmd) + cmd_len + sizeof(*rsp) + resp_len;
- dma_addr_t cmd_phys;
- __le32 *arg_buf;
- __le32 *res_buf;
-
- cmd = kzalloc(PAGE_ALIGN(alloc_len), GFP_KERNEL);
- if (!cmd)
- return -ENOMEM;
-
- cmd->len = cpu_to_le32(alloc_len);
- cmd->buf_offset = cpu_to_le32(sizeof(*cmd));
- cmd->resp_hdr_offset = cpu_to_le32(sizeof(*cmd) + cmd_len);
- cmd->id = cpu_to_le32(LEGACY_FUNCNUM(desc->svc, desc->cmd));
-
- arg_buf = legacy_get_command_buffer(cmd);
- for (i = 0; i < arglen; i++)
- arg_buf[i] = cpu_to_le32(desc->args[i]);
-
- rsp = legacy_command_to_response(cmd);
-
- cmd_phys = dma_map_single(dev, cmd, alloc_len, DMA_TO_DEVICE);
- if (dma_mapping_error(dev, cmd_phys)) {
- kfree(cmd);
- return -ENOMEM;
- }
-
- smc.a[0] = 1;
- smc.a[1] = (unsigned long)&context_id;
- smc.a[2] = cmd_phys;
-
- mutex_lock(&qcom_scm_lock);
- __qcom_scm_call_do(&smc, &res);
- if (res.a0 < 0)
- ret = qcom_scm_remap_error(res.a0);
- mutex_unlock(&qcom_scm_lock);
- if (ret)
- goto out;
-
- do {
- dma_sync_single_for_cpu(dev, cmd_phys + sizeof(*cmd) + cmd_len,
- sizeof(*rsp), DMA_FROM_DEVICE);
- } while (!rsp->is_complete);
-
- dma_sync_single_for_cpu(dev, cmd_phys + sizeof(*cmd) + cmd_len +
- le32_to_cpu(rsp->buf_offset),
- resp_len, DMA_FROM_DEVICE);
-
- res_buf = legacy_get_response_buffer(rsp);
- for (i = 0; i < MAX_QCOM_SCM_RETS; i++)
- desc->res[i] = le32_to_cpu(res_buf[i]);
-out:
- dma_unmap_single(dev, cmd_phys, alloc_len, DMA_TO_DEVICE);
- kfree(cmd);
- return ret;
-}
-
-#define LEGACY_ATOMIC_N_REG_ARGS 5
-#define LEGACY_ATOMIC_FIRST_REG_IDX 2
-#define LEGACY_CLASS_REGISTER (0x2 << 8)
-#define LEGACY_MASK_IRQS BIT(5)
-#define LEGACY_ATOMIC(svc, cmd, n) ((LEGACY_FUNCNUM(svc, cmd) << 12) | \
- LEGACY_CLASS_REGISTER | \
- LEGACY_MASK_IRQS | \
- (n & 0xf))
-
-/**
- * qcom_scm_call_atomic_legacy() - Send an atomic SCM command with up to
- * 5 arguments and 3 return values
- *
- * This shall only be used with commands that are guaranteed to be
- * uninterruptable, atomic and SMP safe.
- */
-static int qcom_scm_call_atomic_legacy(struct device *dev,
- struct qcom_scm_desc *desc)
-{
- int context_id;
- struct arm_smccc_args smc = {0};
- struct arm_smccc_res res;
- size_t i, arglen = desc->arginfo & 0xf;
-
- BUG_ON(arglen > LEGACY_ATOMIC_N_REG_ARGS);
-
- smc.a[0] = LEGACY_ATOMIC(desc->svc, desc->cmd, arglen);
- smc.a[1] = (unsigned long)&context_id;
-
- for(i = 0; i < arglen; i++)
- smc.a[i + LEGACY_ATOMIC_FIRST_REG_IDX] = desc->args[i];
-
- arm_smccc_smc(smc.a[0], smc.a[1], smc.a[2], smc.a[3],
- smc.a[4], smc.a[5], smc.a[6], smc.a[7], &res);
-
- desc->res[0] = res.a1;
- desc->res[1] = res.a2;
- desc->res[2] = res.a3;
-
- return res.a0;
-}
-
-/**
- * qcom_scm_call() - Invoke a syscall in the secure world
- * @dev: device
- * @svc_id: service identifier
- * @cmd_id: command identifier
- * @desc: Descriptor structure containing arguments and return values
- *
- * Sends a command to the SCM and waits for the command to finish processing.
- * This should *only* be called in pre-emptible context.
- */
-static int qcom_scm_call(struct device *dev, struct qcom_scm_desc *desc)
-{
- might_sleep();
- switch (qcom_smc_convention) {
- case SMC_CONVENTION_ARM_32:
- case SMC_CONVENTION_ARM_64:
- return qcom_scm_call_smccc(dev, desc, false);
- case SMC_CONVENTION_LEGACY:
- return qcom_scm_call_legacy(dev, desc);
- default:
- pr_err("Unknown current SCM calling convention.\n");
- return -EINVAL;
- }
-}
-
-/**
- * qcom_scm_call_atomic() - atomic variation of qcom_scm_call()
- * @dev: device
- * @svc_id: service identifier
- * @cmd_id: command identifier
- * @desc: Descriptor structure containing arguments and return values
- * @res: Structure containing results from SMC/HVC call
- *
- * Sends a command to the SCM and waits for the command to finish processing.
- * This can be called in atomic context.
- */
-static int qcom_scm_call_atomic(struct device *dev, struct qcom_scm_desc *desc)
-{
- switch (qcom_smc_convention) {
- case SMC_CONVENTION_ARM_32:
- case SMC_CONVENTION_ARM_64:
- return qcom_scm_call_smccc(dev, desc, true);
- case SMC_CONVENTION_LEGACY:
- return qcom_scm_call_atomic_legacy(dev, desc);
- default:
- pr_err("Unknown current SCM calling convention.\n");
- return -EINVAL;
- }
-}
-
-#define QCOM_SCM_FLAG_COLDBOOT_CPU0 0x00
-#define QCOM_SCM_FLAG_COLDBOOT_CPU1 0x01
-#define QCOM_SCM_FLAG_COLDBOOT_CPU2 0x08
-#define QCOM_SCM_FLAG_COLDBOOT_CPU3 0x20
-
-/**
- * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
- * @entry: Entry point function for the cpus
- * @cpus: The cpumask of cpus that will use the entry point
- *
- * Set the cold boot address of the cpus. Any cpu outside the supported
- * range would be removed from the cpu present mask.
- */
-int __qcom_scm_set_cold_boot_addr(struct device *dev, void *entry,
- const cpumask_t *cpus)
-{
- int flags = 0;
- int cpu;
- int scm_cb_flags[] = {
- QCOM_SCM_FLAG_COLDBOOT_CPU0,
- QCOM_SCM_FLAG_COLDBOOT_CPU1,
- QCOM_SCM_FLAG_COLDBOOT_CPU2,
- QCOM_SCM_FLAG_COLDBOOT_CPU3,
- };
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_SET_ADDR,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- if (!cpus || (cpus && cpumask_empty(cpus)))
- return -EINVAL;
-
- for_each_cpu(cpu, cpus) {
- if (cpu < ARRAY_SIZE(scm_cb_flags))
- flags |= scm_cb_flags[cpu];
- else
- set_cpu_present(cpu, false);
- }
-
- desc.args[0] = flags;
- desc.args[1] = virt_to_phys(entry);
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- return qcom_scm_call_atomic(dev, &desc);
-}
-
-#define QCOM_SCM_FLAG_WARMBOOT_CPU0 0x04
-#define QCOM_SCM_FLAG_WARMBOOT_CPU1 0x02
-#define QCOM_SCM_FLAG_WARMBOOT_CPU2 0x10
-#define QCOM_SCM_FLAG_WARMBOOT_CPU3 0x40
-
-struct qcom_scm_entry {
- int flag;
- void *entry;
-};
-
-static struct qcom_scm_entry qcom_scm_wb[] = {
- { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU0 },
- { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU1 },
- { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU2 },
- { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU3 },
-};
-
-/**
- * qcom_scm_set_warm_boot_addr() - Set the warm boot address for cpus
- * @dev: Device pointer
- * @entry: Entry point function for the cpus
- * @cpus: The cpumask of cpus that will use the entry point
- *
- * Set the Linux entry point for the SCM to transfer control to when coming
- * out of a power down. CPU power down may be executed on cpuidle or hotplug.
- */
-int __qcom_scm_set_warm_boot_addr(struct device *dev, void *entry,
- const cpumask_t *cpus)
-{
- int ret;
- int flags = 0;
- int cpu;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_SET_ADDR,
- };
-
- /*
- * Reassign only if we are switching from hotplug entry point
- * to cpuidle entry point or vice versa.
- */
- for_each_cpu(cpu, cpus) {
- if (entry == qcom_scm_wb[cpu].entry)
- continue;
- flags |= qcom_scm_wb[cpu].flag;
- }
-
- /* No change in entry function */
- if (!flags)
- return 0;
-
- desc.args[0] = virt_to_phys(entry);
- desc.args[1] = flags;
- ret = qcom_scm_call(dev, &desc);
- if (!ret) {
- for_each_cpu(cpu, cpus)
- qcom_scm_wb[cpu].entry = entry;
- }
-
- return ret;
-}
-
-/**
- * qcom_scm_cpu_power_down() - Power down the cpu
- * @flags - Flags to flush cache
- *
- * This is an end point to power down cpu. If there was a pending interrupt,
- * the control would return from this function, otherwise, the cpu jumps to the
- * warm boot entry point set for this cpu upon reset.
- */
-void __qcom_scm_cpu_power_down(struct device *dev, u32 flags)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_TERMINATE_PC,
- .args[0] = flags & QCOM_SCM_FLUSH_FLAG_MASK,
- .arginfo = QCOM_SCM_ARGS(1),
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- qcom_scm_call_atomic(dev, &desc);
-}
-
-int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_SET_REMOTE_STATE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = state;
- desc.args[1] = id;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_BOOT,
- .cmd = QCOM_SCM_BOOT_SET_DLOAD_MODE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = QCOM_SCM_BOOT_SET_DLOAD_MODE;
- desc.args[1] = enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- return qcom_scm_call_atomic(dev, &desc);
-}
-
-bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_IS_SUPPORTED,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = peripheral;
- desc.arginfo = QCOM_SCM_ARGS(1);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? false : !!desc.res[0];
-}
-
-int __qcom_scm_pas_init_image(struct device *dev, u32 peripheral,
- dma_addr_t metadata_phys)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_INIT_IMAGE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = peripheral;
- desc.args[1] = metadata_phys;
- desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_VAL, QCOM_SCM_RW);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_pas_mem_setup(struct device *dev, u32 peripheral,
- phys_addr_t addr, phys_addr_t size)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_MEM_SETUP,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = peripheral;
- desc.args[1] = addr;
- desc.args[2] = size;
- desc.arginfo = QCOM_SCM_ARGS(3);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_pas_auth_and_reset(struct device *dev, u32 peripheral)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_AUTH_AND_RESET,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = peripheral;
- desc.arginfo = QCOM_SCM_ARGS(1);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_pas_shutdown(struct device *dev, u32 peripheral)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_SHUTDOWN,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = peripheral;
- desc.arginfo = QCOM_SCM_ARGS(1);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_PIL,
- .cmd = QCOM_SCM_PIL_PAS_MSS_RESET,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = reset;
- desc.args[1] = 0;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr,
- unsigned int *val)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_IO,
- .cmd = QCOM_SCM_IO_READ,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = addr;
- desc.arginfo = QCOM_SCM_ARGS(1);
-
- ret = qcom_scm_call_atomic(dev, &desc);
- if (ret >= 0)
- *val = desc.res[0];
-
- return ret < 0 ? ret : 0;
-}
-
-int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_IO,
- .cmd = QCOM_SCM_IO_WRITE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = addr;
- desc.args[1] = val;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- return qcom_scm_call_atomic(dev, &desc);
-}
-
-int __qcom_scm_is_call_available(struct device *dev, u32 svc_id, u32 cmd_id)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_INFO,
- .cmd = QCOM_INFO_IS_CALL_AVAIL,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.arginfo = QCOM_SCM_ARGS(1);
- switch (qcom_smc_convention) {
- case SMC_CONVENTION_ARM_32:
- case SMC_CONVENTION_ARM_64:
- desc.args[0] = SMCCC_FUNCNUM(svc_id, cmd_id) |
- (ARM_SMCCC_OWNER_SIP << ARM_SMCCC_OWNER_SHIFT);
- break;
- case SMC_CONVENTION_LEGACY:
- desc.args[0] = LEGACY_FUNCNUM(svc_id, cmd_id);
- break;
- default:
- pr_err("Unknown SMC convention being used\n");
- return -EINVAL;
- }
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id, u32 spare)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_MP,
- .cmd = QCOM_SCM_MP_RESTORE_SEC_CFG,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = device_id;
- desc.args[1] = spare;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
- size_t *size)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_MP,
- .cmd = QCOM_SCM_MP_IOMMU_SECURE_PTBL_SIZE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = spare;
- desc.arginfo = QCOM_SCM_ARGS(1);
-
- ret = qcom_scm_call(dev, &desc);
-
- if (size)
- *size = desc.res[0];
-
- return ret ? : desc.res[1];
-}
-
-int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
- u32 spare)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_MP,
- .cmd = QCOM_SCM_MP_IOMMU_SECURE_PTBL_INIT,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
- int ret;
-
- desc.args[0] = addr;
- desc.args[1] = size;
- desc.args[2] = spare;
- desc.arginfo = QCOM_SCM_ARGS(3, QCOM_SCM_RW, QCOM_SCM_VAL,
- QCOM_SCM_VAL);
-
- ret = qcom_scm_call(dev, &desc);
-
- /* the pg table has been initialized already, ignore the error */
- if (ret == -EPERM)
- ret = 0;
-
- return ret;
-}
-
-int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
- size_t mem_sz, phys_addr_t src, size_t src_sz,
- phys_addr_t dest, size_t dest_sz)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_MP,
- .cmd = QCOM_MP_ASSIGN,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = mem_region;
- desc.args[1] = mem_sz;
- desc.args[2] = src;
- desc.args[3] = src_sz;
- desc.args[4] = dest;
- desc.args[5] = dest_sz;
- desc.args[6] = 0;
-
- desc.arginfo = QCOM_SCM_ARGS(7, QCOM_SCM_RO, QCOM_SCM_VAL,
- QCOM_SCM_RO, QCOM_SCM_VAL, QCOM_SCM_RO,
- QCOM_SCM_VAL, QCOM_SCM_VAL);
-
- ret = qcom_scm_call(dev, &desc);
-
- return ret ? : desc.res[0];
-}
-
-int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
- u32 req_cnt, u32 *resp)
-{
- int ret;
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_HDCP,
- .cmd = QCOM_SCM_HDCP_INVOKE,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT)
- return -ERANGE;
-
- desc.args[0] = req[0].addr;
- desc.args[1] = req[0].val;
- desc.args[2] = req[1].addr;
- desc.args[3] = req[1].val;
- desc.args[4] = req[2].addr;
- desc.args[5] = req[2].val;
- desc.args[6] = req[3].addr;
- desc.args[7] = req[3].val;
- desc.args[8] = req[4].addr;
- desc.args[9] = req[4].val;
- desc.arginfo = QCOM_SCM_ARGS(10);
-
- ret = qcom_scm_call(dev, &desc);
- *resp = desc.res[0];
-
- return ret;
-}
-
-int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev, bool en)
-{
- struct qcom_scm_desc desc = {
- .svc = QCOM_SCM_SVC_SMMU_PROGRAM,
- .cmd = QCOM_SCM_SMMU_CONFIG_ERRATA1,
- .owner = ARM_SMCCC_OWNER_SIP,
- };
-
- desc.args[0] = QCOM_SCM_SMMU_CONFIG_ERRATA1_CLIENT_ALL;
- desc.args[1] = en;
- desc.arginfo = QCOM_SCM_ARGS(2);
-
- return qcom_scm_call_atomic(dev, &desc);
-}
-
-void __qcom_scm_init(void)
-{
- /* First try a SMC64 call */
- qcom_smc_convention = SMC_CONVENTION_ARM_64;
- if (__qcom_scm_is_call_available(NULL, QCOM_SCM_SVC_INFO,
- QCOM_INFO_IS_CALL_AVAIL) <= 0) {
- /* Now try a SMC32 call */
- qcom_smc_convention = SMC_CONVENTION_ARM_32;
- if (__qcom_scm_is_call_available(NULL, QCOM_SCM_SVC_INFO,
- QCOM_INFO_IS_CALL_AVAIL) <= 0) {
- qcom_smc_convention = SMC_CONVENTION_LEGACY;
- }
- }
-}
diff --git a/drivers/firmware/qcom_scm-smc.c b/drivers/firmware/qcom_scm-smc.c
new file mode 100644
index 0000000..18f0bf5
--- /dev/null
+++ b/drivers/firmware/qcom_scm-smc.c
@@ -0,0 +1,938 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2015,2019 The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/qcom_scm.h>
+#include <linux/arm-smccc.h>
+#include <linux/dma-mapping.h>
+
+#include "qcom_scm.h"
+
+#define MAX_QCOM_SCM_ARGS 10
+#define MAX_QCOM_SCM_RETS 3
+
+enum qcom_scm_arg_types {
+ QCOM_SCM_VAL,
+ QCOM_SCM_RO,
+ QCOM_SCM_RW,
+ QCOM_SCM_BUFVAL,
+};
+
+#define QCOM_SCM_ARGS_IMPL(num, a, b, c, d, e, f, g, h, i, j, ...) (\
+ (((a) & 0x3) << 4) | \
+ (((b) & 0x3) << 6) | \
+ (((c) & 0x3) << 8) | \
+ (((d) & 0x3) << 10) | \
+ (((e) & 0x3) << 12) | \
+ (((f) & 0x3) << 14) | \
+ (((g) & 0x3) << 16) | \
+ (((h) & 0x3) << 18) | \
+ (((i) & 0x3) << 20) | \
+ (((j) & 0x3) << 22) | \
+ ((num) & 0xf))
+
+#define QCOM_SCM_ARGS(...) QCOM_SCM_ARGS_IMPL(__VA_ARGS__, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+/**
+ * struct qcom_scm_desc
+ * @arginfo: Metadata describing the arguments in args[]
+ * @args: The array of arguments for the secure syscall
+ * @res: The values returned by the secure syscall
+ */
+struct qcom_scm_desc {
+ u32 svc;
+ u32 cmd;
+ u32 arginfo;
+ u64 args[MAX_QCOM_SCM_ARGS];
+ u64 res[MAX_QCOM_SCM_RETS];
+ u32 owner;
+};
+
+struct arm_smccc_args {
+ unsigned long a[8];
+};
+
+enum qcom_smc_convention {
+ SMC_CONVENTION_UNKNOWN,
+ SMC_CONVENTION_LEGACY,
+ SMC_CONVENTION_ARM_32,
+ SMC_CONVENTION_ARM_64,
+};
+
+static enum qcom_smc_convention qcom_smc_convention = SMC_CONVENTION_UNKNOWN;
+static DEFINE_MUTEX(qcom_scm_lock);
+
+#define QCOM_SCM_EBUSY_WAIT_MS 30
+#define QCOM_SCM_EBUSY_MAX_RETRY 20
+
+#define SMCCC_FUNCNUM(s, c) ((((s) & 0xFF) << 8) | ((c) & 0xFF))
+#define SMCCC_N_REG_ARGS 4
+#define SMCCC_FIRST_REG_IDX 2
+#define SMCCC_N_EXT_ARGS (MAX_QCOM_SCM_ARGS - SMCCC_N_REG_ARGS + 1)
+#define SMCCC_LAST_REG_IDX (SMCCC_FIRST_REG_IDX + SMCCC_N_REG_ARGS - 1)
+
+static void __qcom_scm_call_do_quirk(const struct arm_smccc_args *smc,
+ struct arm_smccc_res *res)
+{
+ unsigned long a0 = smc->a[0];
+ struct arm_smccc_quirk quirk = { .id = ARM_SMCCC_QUIRK_QCOM_A6 };
+
+ quirk.state.a6 = 0;
+
+ do {
+ arm_smccc_smc_quirk(a0, smc->a[1], smc->a[2], smc->a[3],
+ smc->a[4], smc->a[5], quirk.state.a6,
+ smc->a[7], res, &quirk);
+
+ if (res->a0 == QCOM_SCM_INTERRUPTED)
+ a0 = res->a0;
+
+ } while (res->a0 == QCOM_SCM_INTERRUPTED);
+}
+
+static int qcom_scm_call_smccc(struct device *dev,
+ struct qcom_scm_desc *desc, bool atomic)
+{
+ int arglen = desc->arginfo & 0xf;
+ int i;
+ dma_addr_t args_phys = 0;
+ void *args_virt = NULL;
+ size_t alloc_len;
+ gfp_t flag = atomic ? GFP_ATOMIC : GFP_KERNEL;
+ struct arm_smccc_res res;
+ struct arm_smccc_args smc = {0};
+
+ smc.a[0] = ARM_SMCCC_CALL_VAL(
+ atomic ? ARM_SMCCC_FAST_CALL : ARM_SMCCC_STD_CALL,
+ (qcom_smc_convention == SMC_CONVENTION_ARM_64) ?
+ ARM_SMCCC_SMC_64 :
+ ARM_SMCCC_SMC_32,
+ desc->owner,
+ SMCCC_FUNCNUM(desc->svc, desc->cmd));
+ smc.a[1] = desc->arginfo;
+ for (i = 0; i < SMCCC_N_REG_ARGS; i++)
+ smc.a[i + SMCCC_FIRST_REG_IDX] = desc->args[i];
+
+ if (unlikely(arglen > SMCCC_N_REG_ARGS)) {
+ alloc_len = SMCCC_N_EXT_ARGS * sizeof(u64);
+ args_virt = kzalloc(PAGE_ALIGN(alloc_len), flag);
+
+ if (!args_virt)
+ return -ENOMEM;
+
+ if (qcom_smc_convention == SMC_CONVENTION_ARM_32) {
+ __le32 *args = args_virt;
+
+ for (i = 0; i < SMCCC_N_EXT_ARGS; i++)
+ args[i] = cpu_to_le32(desc->args[i +
+ SMCCC_N_REG_ARGS - 1]);
+ } else {
+ __le64 *args = args_virt;
+
+ for (i = 0; i < SMCCC_N_EXT_ARGS; i++)
+ args[i] = cpu_to_le64(desc->args[i +
+ SMCCC_N_REG_ARGS - 1]);
+ }
+
+ args_phys = dma_map_single(dev, args_virt, alloc_len,
+ DMA_TO_DEVICE);
+
+ if (dma_mapping_error(dev, args_phys)) {
+ kfree(args_virt);
+ return -ENOMEM;
+ }
+
+ smc.a[SMCCC_LAST_REG_IDX] = args_phys;
+ }
+
+ if (atomic) {
+ __qcom_scm_call_do_quirk(&smc, &res);
+ } else {
+ int retry_count = 0;
+
+ do {
+ mutex_lock(&qcom_scm_lock);
+
+ __qcom_scm_call_do_quirk(&smc, &res);
+
+ mutex_unlock(&qcom_scm_lock);
+
+ if (res.a0 == QCOM_SCM_V2_EBUSY) {
+ if (retry_count++ > QCOM_SCM_EBUSY_MAX_RETRY)
+ break;
+ msleep(QCOM_SCM_EBUSY_WAIT_MS);
+ }
+ } while (res.a0 == QCOM_SCM_V2_EBUSY);
+ }
+
+ if (args_virt) {
+ dma_unmap_single(dev, args_phys, alloc_len, DMA_TO_DEVICE);
+ kfree(args_virt);
+ }
+
+ if (res.a0 < 0)
+ return qcom_scm_remap_error(res.a0);
+
+ return 0;
+}
+
+#define LEGACY_FUNCNUM(s, c) (((s) << 10) | ((c) & 0x3ff))
+
+/**
+ * struct legacy_command - one SCM command buffer
+ * @len: total available memory for command and response
+ * @buf_offset: start of command buffer
+ * @resp_hdr_offset: start of response buffer
+ * @id: command to be executed
+ * @buf: buffer returned from legacy_get_command_buffer()
+ *
+ * An SCM command is laid out in memory as follows:
+ *
+ * ------------------- <--- struct legacy_command
+ * | command header |
+ * ------------------- <--- legacy_get_command_buffer()
+ * | command buffer |
+ * ------------------- <--- struct legacy_response and
+ * | response header | legacy_command_to_response()
+ * ------------------- <--- legacy_get_response_buffer()
+ * | response buffer |
+ * -------------------
+ *
+ * There can be arbitrary padding between the headers and buffers so
+ * you should always use the appropriate qcom_scm_get_*_buffer() routines
+ * to access the buffers in a safe manner.
+ */
+struct legacy_command {
+ __le32 len;
+ __le32 buf_offset;
+ __le32 resp_hdr_offset;
+ __le32 id;
+ __le32 buf[0];
+};
+
+/**
+ * struct legacy_response - one SCM response buffer
+ * @len: total available memory for response
+ * @buf_offset: start of response data relative to start of legacy_response
+ * @is_complete: indicates if the command has finished processing
+ */
+struct legacy_response {
+ __le32 len;
+ __le32 buf_offset;
+ __le32 is_complete;
+};
+
+/**
+ * legacy_command_to_response() - Get a pointer to a legacy_response
+ * @cmd: command
+ *
+ * Returns a pointer to a response for a command.
+ */
+static inline struct legacy_response *legacy_command_to_response(
+ const struct legacy_command *cmd)
+{
+ return (void *)cmd + le32_to_cpu(cmd->resp_hdr_offset);
+}
+
+/**
+ * legacy_get_command_buffer() - Get a pointer to a command buffer
+ * @cmd: command
+ *
+ * Returns a pointer to the command buffer of a command.
+ */
+static inline void *legacy_get_command_buffer(const struct legacy_command *cmd)
+{
+ return (void *)cmd->buf;
+}
+
+/**
+ * legacy_get_response_buffer() - Get a pointer to a response buffer
+ * @rsp: response
+ *
+ * Returns a pointer to a response buffer of a response.
+ */
+static inline void *legacy_get_response_buffer(const struct legacy_response *rsp)
+{
+ return (void *)rsp + le32_to_cpu(rsp->buf_offset);
+}
+
+static void __qcom_scm_call_do(const struct arm_smccc_args *smc,
+ struct arm_smccc_res *res)
+{
+ do {
+ arm_smccc_smc(smc->a[0], smc->a[1], smc->a[2], smc->a[3],
+ smc->a[4], smc->a[5], smc->a[6], smc->a[7], res);
+ } while (res->a0 == QCOM_SCM_INTERRUPTED);
+}
+
+/**
+ * qcom_scm_call_legacy() - Send an SCM command
+ * @dev: struct device
+ * @svc_id: service identifier
+ * @cmd_id: command identifier
+ * @cmd_buf: command buffer
+ * @cmd_len: length of the command buffer
+ * @resp_buf: response buffer
+ * @resp_len: length of the response buffer
+ *
+ * Sends a command to the SCM and waits for the command to finish processing.
+ *
+ * A note on cache maintenance:
+ * Note that any buffers that are expected to be accessed by the secure world
+ * must be flushed before invoking qcom_scm_call and invalidated in the cache
+ * immediately after qcom_scm_call returns. Cache maintenance on the command
+ * and response buffers is taken care of by qcom_scm_call; however, callers are
+ * responsible for any other cached buffers passed over to the secure world.
+ */
+static int qcom_scm_call_legacy(struct device *dev, struct qcom_scm_desc *desc)
+{
+ int arglen = desc->arginfo & 0xf;
+ int ret = 0, context_id;
+ size_t i;
+ struct legacy_command *cmd;
+ struct legacy_response *rsp;
+ struct arm_smccc_args smc = {0};
+ struct arm_smccc_res res;
+ const size_t cmd_len = arglen * sizeof(__le32);
+ const size_t resp_len = MAX_QCOM_SCM_RETS * sizeof(__le32);
+ size_t alloc_len = sizeof(*cmd) + cmd_len + sizeof(*rsp) + resp_len;
+ dma_addr_t cmd_phys;
+ __le32 *arg_buf;
+ __le32 *res_buf;
+
+ cmd = kzalloc(PAGE_ALIGN(alloc_len), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ cmd->len = cpu_to_le32(alloc_len);
+ cmd->buf_offset = cpu_to_le32(sizeof(*cmd));
+ cmd->resp_hdr_offset = cpu_to_le32(sizeof(*cmd) + cmd_len);
+ cmd->id = cpu_to_le32(LEGACY_FUNCNUM(desc->svc, desc->cmd));
+
+ arg_buf = legacy_get_command_buffer(cmd);
+ for (i = 0; i < arglen; i++)
+ arg_buf[i] = cpu_to_le32(desc->args[i]);
+
+ rsp = legacy_command_to_response(cmd);
+
+ cmd_phys = dma_map_single(dev, cmd, alloc_len, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, cmd_phys)) {
+ kfree(cmd);
+ return -ENOMEM;
+ }
+
+ smc.a[0] = 1;
+ smc.a[1] = (unsigned long)&context_id;
+ smc.a[2] = cmd_phys;
+
+ mutex_lock(&qcom_scm_lock);
+ __qcom_scm_call_do(&smc, &res);
+ if (res.a0 < 0)
+ ret = qcom_scm_remap_error(res.a0);
+ mutex_unlock(&qcom_scm_lock);
+ if (ret)
+ goto out;
+
+ do {
+ dma_sync_single_for_cpu(dev, cmd_phys + sizeof(*cmd) + cmd_len,
+ sizeof(*rsp), DMA_FROM_DEVICE);
+ } while (!rsp->is_complete);
+
+ dma_sync_single_for_cpu(dev, cmd_phys + sizeof(*cmd) + cmd_len +
+ le32_to_cpu(rsp->buf_offset),
+ resp_len, DMA_FROM_DEVICE);
+
+ res_buf = legacy_get_response_buffer(rsp);
+ for (i = 0; i < MAX_QCOM_SCM_RETS; i++)
+ desc->res[i] = le32_to_cpu(res_buf[i]);
+out:
+ dma_unmap_single(dev, cmd_phys, alloc_len, DMA_TO_DEVICE);
+ kfree(cmd);
+ return ret;
+}
+
+#define LEGACY_ATOMIC_N_REG_ARGS 5
+#define LEGACY_ATOMIC_FIRST_REG_IDX 2
+#define LEGACY_CLASS_REGISTER (0x2 << 8)
+#define LEGACY_MASK_IRQS BIT(5)
+#define LEGACY_ATOMIC(svc, cmd, n) ((LEGACY_FUNCNUM(svc, cmd) << 12) | \
+ LEGACY_CLASS_REGISTER | \
+ LEGACY_MASK_IRQS | \
+ (n & 0xf))
+
+/**
+ * qcom_scm_call_atomic_legacy() - Send an atomic SCM command with up to
+ * 5 arguments and 3 return values
+ *
+ * This shall only be used with commands that are guaranteed to be
+ * uninterruptable, atomic and SMP safe.
+ */
+static int qcom_scm_call_atomic_legacy(struct device *dev,
+ struct qcom_scm_desc *desc)
+{
+ int context_id;
+ struct arm_smccc_args smc = {0};
+ struct arm_smccc_res res;
+ size_t i, arglen = desc->arginfo & 0xf;
+
+ BUG_ON(arglen > LEGACY_ATOMIC_N_REG_ARGS);
+
+ smc.a[0] = LEGACY_ATOMIC(desc->svc, desc->cmd, arglen);
+ smc.a[1] = (unsigned long)&context_id;
+
+ for(i = 0; i < arglen; i++)
+ smc.a[i + LEGACY_ATOMIC_FIRST_REG_IDX] = desc->args[i];
+
+ arm_smccc_smc(smc.a[0], smc.a[1], smc.a[2], smc.a[3],
+ smc.a[4], smc.a[5], smc.a[6], smc.a[7], &res);
+
+ desc->res[0] = res.a1;
+ desc->res[1] = res.a2;
+ desc->res[2] = res.a3;
+
+ return res.a0;
+}
+
+/**
+ * qcom_scm_call() - Invoke a syscall in the secure world
+ * @dev: device
+ * @svc_id: service identifier
+ * @cmd_id: command identifier
+ * @desc: Descriptor structure containing arguments and return values
+ *
+ * Sends a command to the SCM and waits for the command to finish processing.
+ * This should *only* be called in pre-emptible context.
+ */
+static int qcom_scm_call(struct device *dev, struct qcom_scm_desc *desc)
+{
+ might_sleep();
+ switch (qcom_smc_convention) {
+ case SMC_CONVENTION_ARM_32:
+ case SMC_CONVENTION_ARM_64:
+ return qcom_scm_call_smccc(dev, desc, false);
+ case SMC_CONVENTION_LEGACY:
+ return qcom_scm_call_legacy(dev, desc);
+ default:
+ pr_err("Unknown current SCM calling convention.\n");
+ return -EINVAL;
+ }
+}
+
+/**
+ * qcom_scm_call_atomic() - atomic variation of qcom_scm_call()
+ * @dev: device
+ * @svc_id: service identifier
+ * @cmd_id: command identifier
+ * @desc: Descriptor structure containing arguments and return values
+ * @res: Structure containing results from SMC/HVC call
+ *
+ * Sends a command to the SCM and waits for the command to finish processing.
+ * This can be called in atomic context.
+ */
+static int qcom_scm_call_atomic(struct device *dev, struct qcom_scm_desc *desc)
+{
+ switch (qcom_smc_convention) {
+ case SMC_CONVENTION_ARM_32:
+ case SMC_CONVENTION_ARM_64:
+ return qcom_scm_call_smccc(dev, desc, true);
+ case SMC_CONVENTION_LEGACY:
+ return qcom_scm_call_atomic_legacy(dev, desc);
+ default:
+ pr_err("Unknown current SCM calling convention.\n");
+ return -EINVAL;
+ }
+}
+
+#define QCOM_SCM_FLAG_COLDBOOT_CPU0 0x00
+#define QCOM_SCM_FLAG_COLDBOOT_CPU1 0x01
+#define QCOM_SCM_FLAG_COLDBOOT_CPU2 0x08
+#define QCOM_SCM_FLAG_COLDBOOT_CPU3 0x20
+
+/**
+ * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
+ * @entry: Entry point function for the cpus
+ * @cpus: The cpumask of cpus that will use the entry point
+ *
+ * Set the cold boot address of the cpus. Any cpu outside the supported
+ * range would be removed from the cpu present mask.
+ */
+int __qcom_scm_set_cold_boot_addr(struct device *dev, void *entry,
+ const cpumask_t *cpus)
+{
+ int flags = 0;
+ int cpu;
+ int scm_cb_flags[] = {
+ QCOM_SCM_FLAG_COLDBOOT_CPU0,
+ QCOM_SCM_FLAG_COLDBOOT_CPU1,
+ QCOM_SCM_FLAG_COLDBOOT_CPU2,
+ QCOM_SCM_FLAG_COLDBOOT_CPU3,
+ };
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_BOOT,
+ .cmd = QCOM_SCM_BOOT_SET_ADDR,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ if (!cpus || (cpus && cpumask_empty(cpus)))
+ return -EINVAL;
+
+ for_each_cpu(cpu, cpus) {
+ if (cpu < ARRAY_SIZE(scm_cb_flags))
+ flags |= scm_cb_flags[cpu];
+ else
+ set_cpu_present(cpu, false);
+ }
+
+ desc.args[0] = flags;
+ desc.args[1] = virt_to_phys(entry);
+ desc.arginfo = QCOM_SCM_ARGS(2);
+
+ return qcom_scm_call_atomic(dev, &desc);
+}
+
+#define QCOM_SCM_FLAG_WARMBOOT_CPU0 0x04
+#define QCOM_SCM_FLAG_WARMBOOT_CPU1 0x02
+#define QCOM_SCM_FLAG_WARMBOOT_CPU2 0x10
+#define QCOM_SCM_FLAG_WARMBOOT_CPU3 0x40
+
+struct qcom_scm_entry {
+ int flag;
+ void *entry;
+};
+
+static struct qcom_scm_entry qcom_scm_wb[] = {
+ { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU0 },
+ { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU1 },
+ { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU2 },
+ { .flag = QCOM_SCM_FLAG_WARMBOOT_CPU3 },
+};
+
+/**
+ * qcom_scm_set_warm_boot_addr() - Set the warm boot address for cpus
+ * @dev: Device pointer
+ * @entry: Entry point function for the cpus
+ * @cpus: The cpumask of cpus that will use the entry point
+ *
+ * Set the Linux entry point for the SCM to transfer control to when coming
+ * out of a power down. CPU power down may be executed on cpuidle or hotplug.
+ */
+int __qcom_scm_set_warm_boot_addr(struct device *dev, void *entry,
+ const cpumask_t *cpus)
+{
+ int ret;
+ int flags = 0;
+ int cpu;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_BOOT,
+ .cmd = QCOM_SCM_BOOT_SET_ADDR,
+ };
+
+ /*
+ * Reassign only if we are switching from hotplug entry point
+ * to cpuidle entry point or vice versa.
+ */
+ for_each_cpu(cpu, cpus) {
+ if (entry == qcom_scm_wb[cpu].entry)
+ continue;
+ flags |= qcom_scm_wb[cpu].flag;
+ }
+
+ /* No change in entry function */
+ if (!flags)
+ return 0;
+
+ desc.args[0] = virt_to_phys(entry);
+ desc.args[1] = flags;
+ ret = qcom_scm_call(dev, &desc);
+ if (!ret) {
+ for_each_cpu(cpu, cpus)
+ qcom_scm_wb[cpu].entry = entry;
+ }
+
+ return ret;
+}
+
+/**
+ * qcom_scm_cpu_power_down() - Power down the cpu
+ * @flags - Flags to flush cache
+ *
+ * This is an end point to power down cpu. If there was a pending interrupt,
+ * the control would return from this function, otherwise, the cpu jumps to the
+ * warm boot entry point set for this cpu upon reset.
+ */
+void __qcom_scm_cpu_power_down(struct device *dev, u32 flags)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_BOOT,
+ .cmd = QCOM_SCM_BOOT_TERMINATE_PC,
+ .args[0] = flags & QCOM_SCM_FLUSH_FLAG_MASK,
+ .arginfo = QCOM_SCM_ARGS(1),
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ qcom_scm_call_atomic(dev, &desc);
+}
+
+int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_BOOT,
+ .cmd = QCOM_SCM_BOOT_SET_REMOTE_STATE,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+ int ret;
+
+ desc.args[0] = state;
+ desc.args[1] = id;
+ desc.arginfo = QCOM_SCM_ARGS(2);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_BOOT,
+ .cmd = QCOM_SCM_BOOT_SET_DLOAD_MODE,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = QCOM_SCM_BOOT_SET_DLOAD_MODE;
+ desc.args[1] = enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0;
+ desc.arginfo = QCOM_SCM_ARGS(2);
+
+ return qcom_scm_call_atomic(dev, &desc);
+}
+
+bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_PIL,
+ .cmd = QCOM_SCM_PIL_PAS_IS_SUPPORTED,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = peripheral;
+ desc.arginfo = QCOM_SCM_ARGS(1);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? false : !!desc.res[0];
+}
+
+int __qcom_scm_pas_init_image(struct device *dev, u32 peripheral,
+ dma_addr_t metadata_phys)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_PIL,
+ .cmd = QCOM_SCM_PIL_PAS_INIT_IMAGE,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = peripheral;
+ desc.args[1] = metadata_phys;
+ desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_VAL, QCOM_SCM_RW);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_pas_mem_setup(struct device *dev, u32 peripheral,
+ phys_addr_t addr, phys_addr_t size)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_PIL,
+ .cmd = QCOM_SCM_PIL_PAS_MEM_SETUP,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = peripheral;
+ desc.args[1] = addr;
+ desc.args[2] = size;
+ desc.arginfo = QCOM_SCM_ARGS(3);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_pas_auth_and_reset(struct device *dev, u32 peripheral)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_PIL,
+ .cmd = QCOM_SCM_PIL_PAS_AUTH_AND_RESET,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = peripheral;
+ desc.arginfo = QCOM_SCM_ARGS(1);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_pas_shutdown(struct device *dev, u32 peripheral)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_PIL,
+ .cmd = QCOM_SCM_PIL_PAS_SHUTDOWN,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = peripheral;
+ desc.arginfo = QCOM_SCM_ARGS(1);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_PIL,
+ .cmd = QCOM_SCM_PIL_PAS_MSS_RESET,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+ int ret;
+
+ desc.args[0] = reset;
+ desc.args[1] = 0;
+ desc.arginfo = QCOM_SCM_ARGS(2);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr,
+ unsigned int *val)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_IO,
+ .cmd = QCOM_SCM_IO_READ,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+ int ret;
+
+ desc.args[0] = addr;
+ desc.arginfo = QCOM_SCM_ARGS(1);
+
+ ret = qcom_scm_call_atomic(dev, &desc);
+ if (ret >= 0)
+ *val = desc.res[0];
+
+ return ret < 0 ? ret : 0;
+}
+
+int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_IO,
+ .cmd = QCOM_SCM_IO_WRITE,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = addr;
+ desc.args[1] = val;
+ desc.arginfo = QCOM_SCM_ARGS(2);
+
+ return qcom_scm_call_atomic(dev, &desc);
+}
+
+int __qcom_scm_is_call_available(struct device *dev, u32 svc_id, u32 cmd_id)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_INFO,
+ .cmd = QCOM_INFO_IS_CALL_AVAIL,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.arginfo = QCOM_SCM_ARGS(1);
+ switch (qcom_smc_convention) {
+ case SMC_CONVENTION_ARM_32:
+ case SMC_CONVENTION_ARM_64:
+ desc.args[0] = SMCCC_FUNCNUM(svc_id, cmd_id) |
+ (ARM_SMCCC_OWNER_SIP << ARM_SMCCC_OWNER_SHIFT);
+ break;
+ case SMC_CONVENTION_LEGACY:
+ desc.args[0] = LEGACY_FUNCNUM(svc_id, cmd_id);
+ break;
+ default:
+ pr_err("Unknown SMC convention being used\n");
+ return -EINVAL;
+ }
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id, u32 spare)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_MP,
+ .cmd = QCOM_SCM_MP_RESTORE_SEC_CFG,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+ int ret;
+
+ desc.args[0] = device_id;
+ desc.args[1] = spare;
+ desc.arginfo = QCOM_SCM_ARGS(2);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
+ size_t *size)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_MP,
+ .cmd = QCOM_SCM_MP_IOMMU_SECURE_PTBL_SIZE,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+ int ret;
+
+ desc.args[0] = spare;
+ desc.arginfo = QCOM_SCM_ARGS(1);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ if (size)
+ *size = desc.res[0];
+
+ return ret ? : desc.res[1];
+}
+
+int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
+ u32 spare)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_MP,
+ .cmd = QCOM_SCM_MP_IOMMU_SECURE_PTBL_INIT,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+ int ret;
+
+ desc.args[0] = addr;
+ desc.args[1] = size;
+ desc.args[2] = spare;
+ desc.arginfo = QCOM_SCM_ARGS(3, QCOM_SCM_RW, QCOM_SCM_VAL,
+ QCOM_SCM_VAL);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ /* the pg table has been initialized already, ignore the error */
+ if (ret == -EPERM)
+ ret = 0;
+
+ return ret;
+}
+
+int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
+ size_t mem_sz, phys_addr_t src, size_t src_sz,
+ phys_addr_t dest, size_t dest_sz)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_MP,
+ .cmd = QCOM_MP_ASSIGN,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = mem_region;
+ desc.args[1] = mem_sz;
+ desc.args[2] = src;
+ desc.args[3] = src_sz;
+ desc.args[4] = dest;
+ desc.args[5] = dest_sz;
+ desc.args[6] = 0;
+
+ desc.arginfo = QCOM_SCM_ARGS(7, QCOM_SCM_RO, QCOM_SCM_VAL,
+ QCOM_SCM_RO, QCOM_SCM_VAL, QCOM_SCM_RO,
+ QCOM_SCM_VAL, QCOM_SCM_VAL);
+
+ ret = qcom_scm_call(dev, &desc);
+
+ return ret ? : desc.res[0];
+}
+
+int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
+ u32 req_cnt, u32 *resp)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_HDCP,
+ .cmd = QCOM_SCM_HDCP_INVOKE,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT)
+ return -ERANGE;
+
+ desc.args[0] = req[0].addr;
+ desc.args[1] = req[0].val;
+ desc.args[2] = req[1].addr;
+ desc.args[3] = req[1].val;
+ desc.args[4] = req[2].addr;
+ desc.args[5] = req[2].val;
+ desc.args[6] = req[3].addr;
+ desc.args[7] = req[3].val;
+ desc.args[8] = req[4].addr;
+ desc.args[9] = req[4].val;
+ desc.arginfo = QCOM_SCM_ARGS(10);
+
+ ret = qcom_scm_call(dev, &desc);
+ *resp = desc.res[0];
+
+ return ret;
+}
+
+int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev, bool en)
+{
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_SMMU_PROGRAM,
+ .cmd = QCOM_SCM_SMMU_CONFIG_ERRATA1,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+
+ desc.args[0] = QCOM_SCM_SMMU_CONFIG_ERRATA1_CLIENT_ALL;
+ desc.args[1] = en;
+ desc.arginfo = QCOM_SCM_ARGS(2);
+
+ return qcom_scm_call_atomic(dev, &desc);
+}
+
+void __qcom_scm_init(void)
+{
+ /* First try a SMC64 call */
+ qcom_smc_convention = SMC_CONVENTION_ARM_64;
+ if (__qcom_scm_is_call_available(NULL, QCOM_SCM_SVC_INFO,
+ QCOM_INFO_IS_CALL_AVAIL) <= 0) {
+ /* Now try a SMC32 call */
+ qcom_smc_convention = SMC_CONVENTION_ARM_32;
+ if (__qcom_scm_is_call_available(NULL, QCOM_SCM_SVC_INFO,
+ QCOM_INFO_IS_CALL_AVAIL) <= 0) {
+ qcom_smc_convention = SMC_CONVENTION_LEGACY;
+ }
+ }
+}
--
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a Linux Foundation Collaborative Project
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