505 lines
12 KiB
C
505 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* Copyright (c) 2015, 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 QCOM_SCM_FNID(s, c) ((((s) & 0xFF) << 8) | ((c) & 0xFF))
|
|
|
|
#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 arginfo;
|
|
u64 args[MAX_QCOM_SCM_ARGS];
|
|
};
|
|
|
|
static u64 qcom_smccc_convention = -1;
|
|
static DEFINE_MUTEX(qcom_scm_lock);
|
|
|
|
#define QCOM_SCM_EBUSY_WAIT_MS 30
|
|
#define QCOM_SCM_EBUSY_MAX_RETRY 20
|
|
|
|
#define N_EXT_QCOM_SCM_ARGS 7
|
|
#define FIRST_EXT_ARG_IDX 3
|
|
#define N_REGISTER_ARGS (MAX_QCOM_SCM_ARGS - N_EXT_QCOM_SCM_ARGS + 1)
|
|
|
|
/**
|
|
* 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, u32 svc_id, u32 cmd_id,
|
|
const struct qcom_scm_desc *desc,
|
|
struct arm_smccc_res *res)
|
|
{
|
|
int arglen = desc->arginfo & 0xf;
|
|
int retry_count = 0, i;
|
|
u32 fn_id = QCOM_SCM_FNID(svc_id, cmd_id);
|
|
u64 cmd, x5 = desc->args[FIRST_EXT_ARG_IDX];
|
|
dma_addr_t args_phys = 0;
|
|
void *args_virt = NULL;
|
|
size_t alloc_len;
|
|
struct arm_smccc_quirk quirk = {.id = ARM_SMCCC_QUIRK_QCOM_A6};
|
|
|
|
if (unlikely(arglen > N_REGISTER_ARGS)) {
|
|
alloc_len = N_EXT_QCOM_SCM_ARGS * sizeof(u64);
|
|
args_virt = kzalloc(PAGE_ALIGN(alloc_len), GFP_KERNEL);
|
|
|
|
if (!args_virt)
|
|
return -ENOMEM;
|
|
|
|
if (qcom_smccc_convention == ARM_SMCCC_SMC_32) {
|
|
__le32 *args = args_virt;
|
|
|
|
for (i = 0; i < N_EXT_QCOM_SCM_ARGS; i++)
|
|
args[i] = cpu_to_le32(desc->args[i +
|
|
FIRST_EXT_ARG_IDX]);
|
|
} else {
|
|
__le64 *args = args_virt;
|
|
|
|
for (i = 0; i < N_EXT_QCOM_SCM_ARGS; i++)
|
|
args[i] = cpu_to_le64(desc->args[i +
|
|
FIRST_EXT_ARG_IDX]);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
x5 = args_phys;
|
|
}
|
|
|
|
do {
|
|
mutex_lock(&qcom_scm_lock);
|
|
|
|
cmd = ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL,
|
|
qcom_smccc_convention,
|
|
ARM_SMCCC_OWNER_SIP, fn_id);
|
|
|
|
quirk.state.a6 = 0;
|
|
|
|
do {
|
|
arm_smccc_smc_quirk(cmd, desc->arginfo, desc->args[0],
|
|
desc->args[1], desc->args[2], x5,
|
|
quirk.state.a6, 0, res, &quirk);
|
|
|
|
if (res->a0 == QCOM_SCM_INTERRUPTED)
|
|
cmd = res->a0;
|
|
|
|
} while (res->a0 == QCOM_SCM_INTERRUPTED);
|
|
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* 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(void *entry, const cpumask_t *cpus)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
/**
|
|
* 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(u32 flags)
|
|
{
|
|
}
|
|
|
|
int __qcom_scm_is_call_available(struct device *dev, u32 svc_id, u32 cmd_id)
|
|
{
|
|
int ret;
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
desc.arginfo = QCOM_SCM_ARGS(1);
|
|
desc.args[0] = QCOM_SCM_FNID(svc_id, cmd_id) |
|
|
(ARM_SMCCC_OWNER_SIP << ARM_SMCCC_OWNER_SHIFT);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_INFO, QCOM_IS_CALL_AVAIL_CMD,
|
|
&desc, &res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
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 = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
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, QCOM_SCM_SVC_HDCP, QCOM_SCM_CMD_HDCP, &desc,
|
|
&res);
|
|
*resp = res.a1;
|
|
|
|
return ret;
|
|
}
|
|
|
|
void __qcom_scm_init(void)
|
|
{
|
|
u64 cmd;
|
|
struct arm_smccc_res res;
|
|
u32 function = QCOM_SCM_FNID(QCOM_SCM_SVC_INFO, QCOM_IS_CALL_AVAIL_CMD);
|
|
|
|
/* First try a SMC64 call */
|
|
cmd = ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64,
|
|
ARM_SMCCC_OWNER_SIP, function);
|
|
|
|
arm_smccc_smc(cmd, QCOM_SCM_ARGS(1), cmd & (~BIT(ARM_SMCCC_TYPE_SHIFT)),
|
|
0, 0, 0, 0, 0, &res);
|
|
|
|
if (!res.a0 && res.a1)
|
|
qcom_smccc_convention = ARM_SMCCC_SMC_64;
|
|
else
|
|
qcom_smccc_convention = ARM_SMCCC_SMC_32;
|
|
}
|
|
|
|
bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral)
|
|
{
|
|
int ret;
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
desc.args[0] = peripheral;
|
|
desc.arginfo = QCOM_SCM_ARGS(1);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_PIL,
|
|
QCOM_SCM_PAS_IS_SUPPORTED_CMD,
|
|
&desc, &res);
|
|
|
|
return ret ? false : !!res.a1;
|
|
}
|
|
|
|
int __qcom_scm_pas_init_image(struct device *dev, u32 peripheral,
|
|
dma_addr_t metadata_phys)
|
|
{
|
|
int ret;
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
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, QCOM_SCM_SVC_PIL, QCOM_SCM_PAS_INIT_IMAGE_CMD,
|
|
&desc, &res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
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 = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
desc.args[0] = peripheral;
|
|
desc.args[1] = addr;
|
|
desc.args[2] = size;
|
|
desc.arginfo = QCOM_SCM_ARGS(3);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_PIL, QCOM_SCM_PAS_MEM_SETUP_CMD,
|
|
&desc, &res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
int __qcom_scm_pas_auth_and_reset(struct device *dev, u32 peripheral)
|
|
{
|
|
int ret;
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
desc.args[0] = peripheral;
|
|
desc.arginfo = QCOM_SCM_ARGS(1);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_PIL,
|
|
QCOM_SCM_PAS_AUTH_AND_RESET_CMD,
|
|
&desc, &res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
int __qcom_scm_pas_shutdown(struct device *dev, u32 peripheral)
|
|
{
|
|
int ret;
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
desc.args[0] = peripheral;
|
|
desc.arginfo = QCOM_SCM_ARGS(1);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_PIL, QCOM_SCM_PAS_SHUTDOWN_CMD,
|
|
&desc, &res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
|
|
{
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
int ret;
|
|
|
|
desc.args[0] = reset;
|
|
desc.args[1] = 0;
|
|
desc.arginfo = QCOM_SCM_ARGS(2);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_PIL, QCOM_SCM_PAS_MSS_RESET, &desc,
|
|
&res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
|
|
{
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
int ret;
|
|
|
|
desc.args[0] = state;
|
|
desc.args[1] = id;
|
|
desc.arginfo = QCOM_SCM_ARGS(2);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_SET_REMOTE_STATE,
|
|
&desc, &res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
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 = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
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, QCOM_SCM_SVC_MP,
|
|
QCOM_MEM_PROT_ASSIGN_ID,
|
|
&desc, &res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id, u32 spare)
|
|
{
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
int ret;
|
|
|
|
desc.args[0] = device_id;
|
|
desc.args[1] = spare;
|
|
desc.arginfo = QCOM_SCM_ARGS(2);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP, QCOM_SCM_RESTORE_SEC_CFG,
|
|
&desc, &res);
|
|
|
|
return ret ? : res.a1;
|
|
}
|
|
|
|
int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
|
|
size_t *size)
|
|
{
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
int ret;
|
|
|
|
desc.args[0] = spare;
|
|
desc.arginfo = QCOM_SCM_ARGS(1);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP,
|
|
QCOM_SCM_IOMMU_SECURE_PTBL_SIZE, &desc, &res);
|
|
|
|
if (size)
|
|
*size = res.a1;
|
|
|
|
return ret ? : res.a2;
|
|
}
|
|
|
|
int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
|
|
u32 spare)
|
|
{
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
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, QCOM_SCM_SVC_MP,
|
|
QCOM_SCM_IOMMU_SECURE_PTBL_INIT, &desc, &res);
|
|
|
|
/* the pg table has been initialized already, ignore the error */
|
|
if (ret == -EPERM)
|
|
ret = 0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
|
|
{
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
desc.args[0] = QCOM_SCM_SET_DLOAD_MODE;
|
|
desc.args[1] = enable ? QCOM_SCM_SET_DLOAD_MODE : 0;
|
|
desc.arginfo = QCOM_SCM_ARGS(2);
|
|
|
|
return qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_SET_DLOAD_MODE,
|
|
&desc, &res);
|
|
}
|
|
|
|
int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr,
|
|
unsigned int *val)
|
|
{
|
|
struct qcom_scm_desc desc = {0};
|
|
struct arm_smccc_res res;
|
|
int ret;
|
|
|
|
desc.args[0] = addr;
|
|
desc.arginfo = QCOM_SCM_ARGS(1);
|
|
|
|
ret = qcom_scm_call(dev, QCOM_SCM_SVC_IO, QCOM_SCM_IO_READ,
|
|
&desc, &res);
|
|
if (ret >= 0)
|
|
*val = res.a1;
|
|
|
|
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 = {0};
|
|
struct arm_smccc_res res;
|
|
|
|
desc.args[0] = addr;
|
|
desc.args[1] = val;
|
|
desc.arginfo = QCOM_SCM_ARGS(2);
|
|
|
|
return qcom_scm_call(dev, QCOM_SCM_SVC_IO, QCOM_SCM_IO_WRITE,
|
|
&desc, &res);
|
|
}
|