| Message ID | 20240710173153.4060457-6-cristian.marussi@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Make SCMI transport as standalone drivers | expand |
On 7/10/2024 10:31 AM, Cristian Marussi wrote: > Make SCMI SMC transport a standalone driver that can be optionally > loaded as a module. > > CC: Peng Fan <peng.fan@nxp.com> > CC: Nikunj Kela <quic_nkela@quicinc.com> > Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> > --- Tested-by: Nikunj Kela <quic_nkela@quicinc.com> Tested this series on SA8775p Qualcomm platform that uses Qualcomm SMC transport. > v1 --> v2 > - make scmi_smc_desc static > --- > drivers/firmware/arm_scmi/Kconfig | 4 ++- > drivers/firmware/arm_scmi/Makefile | 2 +- > drivers/firmware/arm_scmi/common.h | 3 -- > drivers/firmware/arm_scmi/driver.c | 5 --- > .../arm_scmi/{smc.c => scmi_transport_smc.c} | 33 +++++++++++++++---- > 5 files changed, 30 insertions(+), 17 deletions(-) > rename drivers/firmware/arm_scmi/{smc.c => scmi_transport_smc.c} (89%) > > diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/Kconfig > index 135e34aefd70..a4d44ef8bf45 100644 > --- a/drivers/firmware/arm_scmi/Kconfig > +++ b/drivers/firmware/arm_scmi/Kconfig > @@ -102,7 +102,7 @@ config ARM_SCMI_TRANSPORT_OPTEE > transport based on OP-TEE SCMI service, answer Y. > > config ARM_SCMI_TRANSPORT_SMC > - bool "SCMI transport based on SMC" > + tristate "SCMI transport based on SMC" > depends on HAVE_ARM_SMCCC_DISCOVERY > select ARM_SCMI_HAVE_TRANSPORT > select ARM_SCMI_HAVE_SHMEM > @@ -112,6 +112,8 @@ config ARM_SCMI_TRANSPORT_SMC > > If you want the ARM SCMI PROTOCOL stack to include support for a > transport based on SMC, answer Y. > + This driver can also be built as a module. If so, the module > + will be called scmi_transport_smc. > > config ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE > bool "Enable atomic mode support for SCMI SMC transport" > diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile > index 121612d75f0b..6868a47fa4ab 100644 > --- a/drivers/firmware/arm_scmi/Makefile > +++ b/drivers/firmware/arm_scmi/Makefile > @@ -5,7 +5,6 @@ scmi-core-objs := $(scmi-bus-y) > scmi-driver-y = driver.o notify.o > scmi-driver-$(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT) += raw_mode.o > scmi-transport-$(CONFIG_ARM_SCMI_HAVE_SHMEM) = shmem.o > -scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_SMC) += smc.o > scmi-transport-$(CONFIG_ARM_SCMI_HAVE_MSG) += msg.o > scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_VIRTIO) += virtio.o > scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_OPTEE) += optee.o > @@ -13,6 +12,7 @@ scmi-protocols-y := base.o clock.o perf.o power.o reset.o sensors.o system.o vol > scmi-protocols-y += pinctrl.o > scmi-module-objs := $(scmi-driver-y) $(scmi-protocols-y) $(scmi-transport-y) > > +obj-$(CONFIG_ARM_SCMI_TRANSPORT_SMC) += scmi_transport_smc.o > obj-$(CONFIG_ARM_SCMI_TRANSPORT_MAILBOX) += scmi_transport_mailbox.o > > obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-core.o > diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h > index 0f2256a61622..edb786cde25c 100644 > --- a/drivers/firmware/arm_scmi/common.h > +++ b/drivers/firmware/arm_scmi/common.h > @@ -286,9 +286,6 @@ int scmi_xfer_raw_inflight_register(const struct scmi_handle *handle, > int scmi_xfer_raw_wait_for_message_response(struct scmi_chan_info *cinfo, > struct scmi_xfer *xfer, > unsigned int timeout_ms); > -#ifdef CONFIG_ARM_SCMI_TRANSPORT_SMC > -extern const struct scmi_desc scmi_smc_desc; > -#endif > #ifdef CONFIG_ARM_SCMI_TRANSPORT_VIRTIO > extern const struct scmi_desc scmi_virtio_desc; > #endif > diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c > index 96cf8ab4421e..b14c5326930a 100644 > --- a/drivers/firmware/arm_scmi/driver.c > +++ b/drivers/firmware/arm_scmi/driver.c > @@ -3254,11 +3254,6 @@ static const struct of_device_id scmi_of_match[] = { > #ifdef CONFIG_ARM_SCMI_TRANSPORT_OPTEE > { .compatible = "linaro,scmi-optee", .data = &scmi_optee_desc }, > #endif > -#ifdef CONFIG_ARM_SCMI_TRANSPORT_SMC > - { .compatible = "arm,scmi-smc", .data = &scmi_smc_desc}, > - { .compatible = "arm,scmi-smc-param", .data = &scmi_smc_desc}, > - { .compatible = "qcom,scmi-smc", .data = &scmi_smc_desc}, > -#endif > #ifdef CONFIG_ARM_SCMI_TRANSPORT_VIRTIO > { .compatible = "arm,scmi-virtio", .data = &scmi_virtio_desc}, > #endif > diff --git a/drivers/firmware/arm_scmi/smc.c b/drivers/firmware/arm_scmi/scmi_transport_smc.c > similarity index 89% > rename from drivers/firmware/arm_scmi/smc.c > rename to drivers/firmware/arm_scmi/scmi_transport_smc.c > index 4cb86386c490..291e33207536 100644 > --- a/drivers/firmware/arm_scmi/smc.c > +++ b/drivers/firmware/arm_scmi/scmi_transport_smc.c > @@ -3,7 +3,7 @@ > * System Control and Management Interface (SCMI) Message SMC/HVC > * Transport driver > * > - * Copyright 2020 NXP > + * Copyright 2020-2024 NXP > */ > > #include <linux/arm-smccc.h> > @@ -16,6 +16,7 @@ > #include <linux/of_address.h> > #include <linux/of_irq.h> > #include <linux/limits.h> > +#include <linux/platform_device.h> > #include <linux/processor.h> > #include <linux/slab.h> > > @@ -69,12 +70,14 @@ struct scmi_smc { > unsigned long cap_id; > }; > > +static struct scmi_transport_core_operations *core; > + > static irqreturn_t smc_msg_done_isr(int irq, void *data) > { > struct scmi_smc *scmi_info = data; > > - scmi_rx_callback(scmi_info->cinfo, > - scmi_shmem_ops.read_header(scmi_info->shmem), NULL); > + core->rx_callback(scmi_info->cinfo, > + core->shmem->read_header(scmi_info->shmem), NULL); > > return IRQ_HANDLED; > } > @@ -141,7 +144,7 @@ static int smc_chan_setup(struct scmi_chan_info *cinfo, struct device *dev, > if (!scmi_info) > return -ENOMEM; > > - scmi_info->shmem = scmi_shmem_ops.setup_iomap(cinfo, dev, tx, &res); > + scmi_info->shmem = core->shmem->setup_iomap(cinfo, dev, tx, &res); > if (IS_ERR(scmi_info->shmem)) > return PTR_ERR(scmi_info->shmem); > > @@ -226,7 +229,7 @@ static int smc_send_message(struct scmi_chan_info *cinfo, > */ > smc_channel_lock_acquire(scmi_info, xfer); > > - scmi_shmem_ops.tx_prepare(scmi_info->shmem, xfer, cinfo); > + core->shmem->tx_prepare(scmi_info->shmem, xfer, cinfo); > > if (scmi_info->cap_id != ULONG_MAX) > arm_smccc_1_1_invoke(scmi_info->func_id, scmi_info->cap_id, 0, > @@ -250,7 +253,7 @@ static void smc_fetch_response(struct scmi_chan_info *cinfo, > { > struct scmi_smc *scmi_info = cinfo->transport_info; > > - scmi_shmem_ops.fetch_response(scmi_info->shmem, xfer); > + core->shmem->fetch_response(scmi_info->shmem, xfer); > } > > static void smc_mark_txdone(struct scmi_chan_info *cinfo, int ret, > @@ -270,7 +273,7 @@ static const struct scmi_transport_ops scmi_smc_ops = { > .fetch_response = smc_fetch_response, > }; > > -const struct scmi_desc scmi_smc_desc = { > +static const struct scmi_desc scmi_smc_desc = { > .ops = &scmi_smc_ops, > .max_rx_timeout_ms = 30, > .max_msg = 20, > @@ -286,3 +289,19 @@ const struct scmi_desc scmi_smc_desc = { > .sync_cmds_completed_on_ret = true, > .atomic_enabled = IS_ENABLED(CONFIG_ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE), > }; > + > +static const struct of_device_id scmi_of_match[] = { > + { .compatible = "arm,scmi-smc" }, > + { .compatible = "arm,scmi-smc-param" }, > + { .compatible = "qcom,scmi-smc" }, > + { /* Sentinel */ }, > +}; > + > +DEFINE_SCMI_TRANSPORT_DRIVER(scmi_smc, scmi_of_match, &core); > +module_platform_driver(scmi_smc_driver); > + > +MODULE_ALIAS("scmi-transport-smc"); > +MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>"); > +MODULE_AUTHOR("Nikunj Kela <quic_nkela@quicinc.com>"); > +MODULE_DESCRIPTION("SCMI SMC Transport driver"); > +MODULE_LICENSE("GPL");
On Wed, Jul 10, 2024 at 02:04:16PM -0700, Nikunj Kela wrote: > > On 7/10/2024 10:31 AM, Cristian Marussi wrote: > > Make SCMI SMC transport a standalone driver that can be optionally > > loaded as a module. > > > > CC: Peng Fan <peng.fan@nxp.com> > > CC: Nikunj Kela <quic_nkela@quicinc.com> > > Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> > > --- > > Tested-by: Nikunj Kela <quic_nkela@quicinc.com> > > Tested this series on SA8775p Qualcomm platform that uses Qualcomm SMC > transport. > Thanks Nikunj ! Cristian
diff --git a/drivers/firmware/arm_scmi/Kconfig b/drivers/firmware/arm_scmi/Kconfig index 135e34aefd70..a4d44ef8bf45 100644 --- a/drivers/firmware/arm_scmi/Kconfig +++ b/drivers/firmware/arm_scmi/Kconfig @@ -102,7 +102,7 @@ config ARM_SCMI_TRANSPORT_OPTEE transport based on OP-TEE SCMI service, answer Y. config ARM_SCMI_TRANSPORT_SMC - bool "SCMI transport based on SMC" + tristate "SCMI transport based on SMC" depends on HAVE_ARM_SMCCC_DISCOVERY select ARM_SCMI_HAVE_TRANSPORT select ARM_SCMI_HAVE_SHMEM @@ -112,6 +112,8 @@ config ARM_SCMI_TRANSPORT_SMC If you want the ARM SCMI PROTOCOL stack to include support for a transport based on SMC, answer Y. + This driver can also be built as a module. If so, the module + will be called scmi_transport_smc. config ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE bool "Enable atomic mode support for SCMI SMC transport" diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile index 121612d75f0b..6868a47fa4ab 100644 --- a/drivers/firmware/arm_scmi/Makefile +++ b/drivers/firmware/arm_scmi/Makefile @@ -5,7 +5,6 @@ scmi-core-objs := $(scmi-bus-y) scmi-driver-y = driver.o notify.o scmi-driver-$(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT) += raw_mode.o scmi-transport-$(CONFIG_ARM_SCMI_HAVE_SHMEM) = shmem.o -scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_SMC) += smc.o scmi-transport-$(CONFIG_ARM_SCMI_HAVE_MSG) += msg.o scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_VIRTIO) += virtio.o scmi-transport-$(CONFIG_ARM_SCMI_TRANSPORT_OPTEE) += optee.o @@ -13,6 +12,7 @@ scmi-protocols-y := base.o clock.o perf.o power.o reset.o sensors.o system.o vol scmi-protocols-y += pinctrl.o scmi-module-objs := $(scmi-driver-y) $(scmi-protocols-y) $(scmi-transport-y) +obj-$(CONFIG_ARM_SCMI_TRANSPORT_SMC) += scmi_transport_smc.o obj-$(CONFIG_ARM_SCMI_TRANSPORT_MAILBOX) += scmi_transport_mailbox.o obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-core.o diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index 0f2256a61622..edb786cde25c 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -286,9 +286,6 @@ int scmi_xfer_raw_inflight_register(const struct scmi_handle *handle, int scmi_xfer_raw_wait_for_message_response(struct scmi_chan_info *cinfo, struct scmi_xfer *xfer, unsigned int timeout_ms); -#ifdef CONFIG_ARM_SCMI_TRANSPORT_SMC -extern const struct scmi_desc scmi_smc_desc; -#endif #ifdef CONFIG_ARM_SCMI_TRANSPORT_VIRTIO extern const struct scmi_desc scmi_virtio_desc; #endif diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 96cf8ab4421e..b14c5326930a 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -3254,11 +3254,6 @@ static const struct of_device_id scmi_of_match[] = { #ifdef CONFIG_ARM_SCMI_TRANSPORT_OPTEE { .compatible = "linaro,scmi-optee", .data = &scmi_optee_desc }, #endif -#ifdef CONFIG_ARM_SCMI_TRANSPORT_SMC - { .compatible = "arm,scmi-smc", .data = &scmi_smc_desc}, - { .compatible = "arm,scmi-smc-param", .data = &scmi_smc_desc}, - { .compatible = "qcom,scmi-smc", .data = &scmi_smc_desc}, -#endif #ifdef CONFIG_ARM_SCMI_TRANSPORT_VIRTIO { .compatible = "arm,scmi-virtio", .data = &scmi_virtio_desc}, #endif diff --git a/drivers/firmware/arm_scmi/smc.c b/drivers/firmware/arm_scmi/scmi_transport_smc.c similarity index 89% rename from drivers/firmware/arm_scmi/smc.c rename to drivers/firmware/arm_scmi/scmi_transport_smc.c index 4cb86386c490..291e33207536 100644 --- a/drivers/firmware/arm_scmi/smc.c +++ b/drivers/firmware/arm_scmi/scmi_transport_smc.c @@ -3,7 +3,7 @@ * System Control and Management Interface (SCMI) Message SMC/HVC * Transport driver * - * Copyright 2020 NXP + * Copyright 2020-2024 NXP */ #include <linux/arm-smccc.h> @@ -16,6 +16,7 @@ #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/limits.h> +#include <linux/platform_device.h> #include <linux/processor.h> #include <linux/slab.h> @@ -69,12 +70,14 @@ struct scmi_smc { unsigned long cap_id; }; +static struct scmi_transport_core_operations *core; + static irqreturn_t smc_msg_done_isr(int irq, void *data) { struct scmi_smc *scmi_info = data; - scmi_rx_callback(scmi_info->cinfo, - scmi_shmem_ops.read_header(scmi_info->shmem), NULL); + core->rx_callback(scmi_info->cinfo, + core->shmem->read_header(scmi_info->shmem), NULL); return IRQ_HANDLED; } @@ -141,7 +144,7 @@ static int smc_chan_setup(struct scmi_chan_info *cinfo, struct device *dev, if (!scmi_info) return -ENOMEM; - scmi_info->shmem = scmi_shmem_ops.setup_iomap(cinfo, dev, tx, &res); + scmi_info->shmem = core->shmem->setup_iomap(cinfo, dev, tx, &res); if (IS_ERR(scmi_info->shmem)) return PTR_ERR(scmi_info->shmem); @@ -226,7 +229,7 @@ static int smc_send_message(struct scmi_chan_info *cinfo, */ smc_channel_lock_acquire(scmi_info, xfer); - scmi_shmem_ops.tx_prepare(scmi_info->shmem, xfer, cinfo); + core->shmem->tx_prepare(scmi_info->shmem, xfer, cinfo); if (scmi_info->cap_id != ULONG_MAX) arm_smccc_1_1_invoke(scmi_info->func_id, scmi_info->cap_id, 0, @@ -250,7 +253,7 @@ static void smc_fetch_response(struct scmi_chan_info *cinfo, { struct scmi_smc *scmi_info = cinfo->transport_info; - scmi_shmem_ops.fetch_response(scmi_info->shmem, xfer); + core->shmem->fetch_response(scmi_info->shmem, xfer); } static void smc_mark_txdone(struct scmi_chan_info *cinfo, int ret, @@ -270,7 +273,7 @@ static const struct scmi_transport_ops scmi_smc_ops = { .fetch_response = smc_fetch_response, }; -const struct scmi_desc scmi_smc_desc = { +static const struct scmi_desc scmi_smc_desc = { .ops = &scmi_smc_ops, .max_rx_timeout_ms = 30, .max_msg = 20, @@ -286,3 +289,19 @@ const struct scmi_desc scmi_smc_desc = { .sync_cmds_completed_on_ret = true, .atomic_enabled = IS_ENABLED(CONFIG_ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE), }; + +static const struct of_device_id scmi_of_match[] = { + { .compatible = "arm,scmi-smc" }, + { .compatible = "arm,scmi-smc-param" }, + { .compatible = "qcom,scmi-smc" }, + { /* Sentinel */ }, +}; + +DEFINE_SCMI_TRANSPORT_DRIVER(scmi_smc, scmi_of_match, &core); +module_platform_driver(scmi_smc_driver); + +MODULE_ALIAS("scmi-transport-smc"); +MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>"); +MODULE_AUTHOR("Nikunj Kela <quic_nkela@quicinc.com>"); +MODULE_DESCRIPTION("SCMI SMC Transport driver"); +MODULE_LICENSE("GPL");
Make SCMI SMC transport a standalone driver that can be optionally loaded as a module. CC: Peng Fan <peng.fan@nxp.com> CC: Nikunj Kela <quic_nkela@quicinc.com> Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> --- v1 --> v2 - make scmi_smc_desc static --- drivers/firmware/arm_scmi/Kconfig | 4 ++- drivers/firmware/arm_scmi/Makefile | 2 +- drivers/firmware/arm_scmi/common.h | 3 -- drivers/firmware/arm_scmi/driver.c | 5 --- .../arm_scmi/{smc.c => scmi_transport_smc.c} | 33 +++++++++++++++---- 5 files changed, 30 insertions(+), 17 deletions(-) rename drivers/firmware/arm_scmi/{smc.c => scmi_transport_smc.c} (89%)