diff options
Diffstat (limited to 'drivers/firmware/qcom_scm-64.c')
| -rw-r--r-- | drivers/firmware/qcom_scm-64.c | 165 |
1 files changed, 120 insertions, 45 deletions
diff --git a/drivers/firmware/qcom_scm-64.c b/drivers/firmware/qcom_scm-64.c index 91d5ad7cf58b..3c5850350974 100644 --- a/drivers/firmware/qcom_scm-64.c +++ b/drivers/firmware/qcom_scm-64.c @@ -62,32 +62,72 @@ static DEFINE_MUTEX(qcom_scm_lock); #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) +static void __qcom_scm_call_do(const struct qcom_scm_desc *desc, + struct arm_smccc_res *res, u32 fn_id, + u64 x5, u32 type) +{ + u64 cmd; + struct arm_smccc_quirk quirk = { .id = ARM_SMCCC_QUIRK_QCOM_A6 }; + + cmd = ARM_SMCCC_CALL_VAL(type, 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); +} + +static void qcom_scm_call_do(const struct qcom_scm_desc *desc, + struct arm_smccc_res *res, u32 fn_id, + u64 x5, bool atomic) +{ + int retry_count = 0; + + if (atomic) { + __qcom_scm_call_do(desc, res, fn_id, x5, ARM_SMCCC_FAST_CALL); + return; + } + + do { + mutex_lock(&qcom_scm_lock); + + __qcom_scm_call_do(desc, res, fn_id, x5, + ARM_SMCCC_STD_CALL); + + 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); +} + +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, bool atomic) { int arglen = desc->arginfo & 0xf; - int retry_count = 0, i; + int i; u32 fn_id = QCOM_SCM_FNID(svc_id, cmd_id); - u64 cmd, x5 = desc->args[FIRST_EXT_ARG_IDX]; + u64 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}; + gfp_t flag = atomic ? GFP_ATOMIC : GFP_KERNEL; if (unlikely(arglen > N_REGISTER_ARGS)) { alloc_len = N_EXT_QCOM_SCM_ARGS * sizeof(u64); - args_virt = kzalloc(PAGE_ALIGN(alloc_len), GFP_KERNEL); + args_virt = kzalloc(PAGE_ALIGN(alloc_len), flag); if (!args_virt) return -ENOMEM; @@ -117,46 +157,56 @@ static int qcom_scm_call(struct device *dev, u32 svc_id, u32 cmd_id, 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); + qcom_scm_call_do(desc, res, fn_id, x5, atomic); if (args_virt) { dma_unmap_single(dev, args_phys, alloc_len, DMA_TO_DEVICE); kfree(args_virt); } - if (res->a0 < 0) + if ((long)res->a0 < 0) return qcom_scm_remap_error(res->a0); return 0; } /** + * 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) +{ + might_sleep(); + return ___qcom_scm_call(dev, svc_id, cmd_id, desc, res, false); +} + +/** + * 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, u32 svc_id, u32 cmd_id, + const struct qcom_scm_desc *desc, + struct arm_smccc_res *res) +{ + return ___qcom_scm_call(dev, svc_id, cmd_id, desc, res, true); +} + +/** * 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 @@ -241,6 +291,18 @@ int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req, return ret; } +int __qcom_scm_ocmem_lock(struct device *dev, uint32_t id, uint32_t offset, + uint32_t size, uint32_t mode) +{ + return -ENOTSUPP; +} + +int __qcom_scm_ocmem_unlock(struct device *dev, uint32_t id, uint32_t offset, + uint32_t size) +{ + return -ENOTSUPP; +} + void __qcom_scm_init(void) { u64 cmd; @@ -502,3 +564,16 @@ int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val) return qcom_scm_call(dev, QCOM_SCM_SVC_IO, QCOM_SCM_IO_WRITE, &desc, &res); } + +int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev, bool en) +{ + struct qcom_scm_desc desc = {0}; + struct arm_smccc_res res; + + desc.args[0] = QCOM_SCM_CONFIG_ERRATA1_CLIENT_ALL; + desc.args[1] = en; + desc.arginfo = QCOM_SCM_ARGS(2); + + return qcom_scm_call_atomic(dev, QCOM_SCM_SVC_SMMU_PROGRAM, + QCOM_SCM_CONFIG_ERRATA1, &desc, &res); +} |