On Mon, Jan 16, 2017 at 11:56:18PM -0600, Andy Gross wrote:
> This patch adds a set remote state SCM API. This will be used by the
> Venus and GPU subsystems to set state on the remote processors.
>
> This work was based on two patch sets by Jordan Crouse and Stanimir
> Varbanov.
>
> Signed-off-by: Andy Gross <andy.gross@xxxxxxxxxx>
Acked-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
> ---
> drivers/firmware/qcom_scm-32.c | 18 ++++++++++++++++++
> drivers/firmware/qcom_scm-64.c | 16 ++++++++++++++++
> drivers/firmware/qcom_scm.c | 6 ++++++
> drivers/firmware/qcom_scm.h | 2 ++
> include/linux/qcom_scm.h | 4 +++-
> 5 files changed, 45 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
> index c6aeedb..8ad226c 100644
> --- a/drivers/firmware/qcom_scm-32.c
> +++ b/drivers/firmware/qcom_scm-32.c
> @@ -560,3 +560,21 @@ int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
>
> return ret ? : le32_to_cpu(out);
> }
> +
> +int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
> +{
> + struct {
> + __le32 state;
> + __le32 id;
> + } req;
> + __le32 scm_ret = 0;
> + int ret;
> +
> + req.state = cpu_to_le32(state);
> + req.id = cpu_to_le32(id);
> +
> + ret = qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_SET_REMOTE_STATE,
> + &req, sizeof(req), &scm_ret, sizeof(scm_ret));
> +
> + return ret ? : le32_to_cpu(scm_ret);
> +}
> diff --git a/drivers/firmware/qcom_scm-64.c b/drivers/firmware/qcom_scm-64.c
> index 4a0f5ea..4b220ab 100644
> --- a/drivers/firmware/qcom_scm-64.c
> +++ b/drivers/firmware/qcom_scm-64.c
> @@ -358,3 +358,19 @@ int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
>
> 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;
> +}
> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> index 65d0d9d..d987bcc 100644
> --- a/drivers/firmware/qcom_scm.c
> +++ b/drivers/firmware/qcom_scm.c
> @@ -324,6 +324,12 @@ bool qcom_scm_is_available(void)
> }
> EXPORT_SYMBOL(qcom_scm_is_available);
>
> +int qcom_scm_set_remote_state(u32 state, u32 id)
> +{
> + return __qcom_scm_set_remote_state(__scm->dev, state, id);
> +}
> +EXPORT_SYMBOL(qcom_scm_set_remote_state);
> +
> static int qcom_scm_probe(struct platform_device *pdev)
> {
> struct qcom_scm *scm;
> diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
> index 3584b00..6a0f154 100644
> --- a/drivers/firmware/qcom_scm.h
> +++ b/drivers/firmware/qcom_scm.h
> @@ -15,6 +15,8 @@
> #define QCOM_SCM_SVC_BOOT 0x1
> #define QCOM_SCM_BOOT_ADDR 0x1
> #define QCOM_SCM_BOOT_ADDR_MC 0x11
> +#define QCOM_SCM_SET_REMOTE_STATE 0xa
> +extern int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id);
>
> #define QCOM_SCM_FLAG_HLOS 0x01
> #define QCOM_SCM_FLAG_COLDBOOT_MC 0x02
> diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
> index 7e004fb..d32f6f1 100644
> --- a/include/linux/qcom_scm.h
> +++ b/include/linux/qcom_scm.h
> @@ -39,6 +39,7 @@ extern int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr,
> extern int qcom_scm_pas_shutdown(u32 peripheral);
> extern void qcom_scm_cpu_power_down(u32 flags);
> extern u32 qcom_scm_get_version(void);
> +extern int qcom_scm_set_remote_state(u32 state, u32 id);
> #else
> static inline
> int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus)
> @@ -64,6 +65,7 @@ static inline int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr,
> static inline int qcom_scm_pas_shutdown(u32 peripheral) { return -ENODEV; }
> static inline void qcom_scm_cpu_power_down(u32 flags) {}
> static inline u32 qcom_scm_get_version(void) { return 0; }
> +static inline u32
> +qcom_scm_set_remote_state(u32 state,u32 id) { return -ENODEV; }
> #endif
> -
> #endif
> --
> 1.9.1
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