If you want the ARM SCMI PROTOCOL stack to include support for a
transport based on OP-TEE SCMI service, answer Y.
-config ARM_SCMI_TRANSPORT_SMC
- bool "SCMI transport based on SMC"
- depends on HAVE_ARM_SMCCC_DISCOVERY
- select ARM_SCMI_HAVE_TRANSPORT
- select ARM_SCMI_HAVE_SHMEM
- default y
- help
- Enable SMC based transport for SCMI.
-
- If you want the ARM SCMI PROTOCOL stack to include support for a
- transport based on SMC, answer Y.
-
-config ARM_SCMI_TRANSPORT_SMC_ATOMIC_ENABLE
- bool "Enable atomic mode support for SCMI SMC transport"
- depends on ARM_SCMI_TRANSPORT_SMC
- help
- Enable support of atomic operation for SCMI SMC based transport.
-
- If you want the SCMI SMC based transport to operate in atomic
- mode, avoiding any kind of sleeping behaviour for selected
- transactions on the TX path, answer Y.
- Enabling atomic mode operations allows any SCMI driver using this
- transport to optionally ask for atomic SCMI transactions and operate
- in atomic context too, at the price of using a number of busy-waiting
- primitives all over instead. If unsure say N.
-
config ARM_SCMI_TRANSPORT_VIRTIO
bool "SCMI transport based on VirtIO"
depends on VIRTIO=y || VIRTIO=ARM_SCMI_PROTOCOL
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
obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-module.o
obj-$(CONFIG_ARM_SCMI_POWER_CONTROL) += scmi_power_control.o
-
-ifeq ($(CONFIG_THUMB2_KERNEL)$(CONFIG_CC_IS_CLANG),yy)
-# The use of R7 in the SMCCC conflicts with the compiler's use of R7 as a frame
-# pointer in Thumb2 mode, which is forcibly enabled by Clang when profiling
-# hooks are inserted via the -pg switch.
-CFLAGS_REMOVE_smc.o += $(CC_FLAGS_FTRACE)
-endif
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
#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
This driver can also be built as a module. If so, the module
will be called scmi_transport_mailbox.
+config ARM_SCMI_TRANSPORT_SMC
+ tristate "SCMI transport based on SMC"
+ depends on HAVE_ARM_SMCCC_DISCOVERY
+ select ARM_SCMI_HAVE_TRANSPORT
+ select ARM_SCMI_HAVE_SHMEM
+ default y
+ help
+ Enable SMC based transport for SCMI.
+
+ 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"
+ depends on ARM_SCMI_TRANSPORT_SMC
+ help
+ Enable support of atomic operation for SCMI SMC based transport.
+
+ If you want the SCMI SMC based transport to operate in atomic
+ mode, avoiding any kind of sleeping behaviour for selected
+ transactions on the TX path, answer Y.
+ Enabling atomic mode operations allows any SCMI driver using this
+ transport to optionally ask for atomic SCMI transactions and operate
+ in atomic context too, at the price of using a number of busy-waiting
+ primitives all over instead. If unsure say N.
+
endmenu
# SPDX-License-Identifier: GPL-2.0-only
scmi_transport_mailbox-objs := mailbox.o
obj-$(CONFIG_ARM_SCMI_TRANSPORT_MAILBOX) += scmi_transport_mailbox.o
+scmi_transport_smc-objs := smc.o
+obj-$(CONFIG_ARM_SCMI_TRANSPORT_SMC) += scmi_transport_smc.o
+ifeq ($(CONFIG_THUMB2_KERNEL)$(CONFIG_CC_IS_CLANG),yy)
+# The use of R7 in the SMCCC conflicts with the compiler's use of R7 as a frame
+# pointer in Thumb2 mode, which is forcibly enabled by Clang when profiling
+# hooks are inserted via the -pg switch.
+CFLAGS_REMOVE_smc.o += $(CC_FLAGS_FTRACE)
+endif
#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>
-#include "common.h"
+#include "../common.h"
/*
* The shmem address is split into 4K page and offset.
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;
}
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);
*/
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,
{
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,
.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,
.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_smc_driver, scmi_smc_desc,
+ scmi_of_match, core);
+module_platform_driver(scmi_smc_driver);
+
+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");
projects / thirdparty / kernel / linux.git / commitdiff
