such useful debug counters. This can be helpful for debugging and
SCMI monitoring.
-config ARM_SCMI_HAVE_TRANSPORT
- bool
- help
- This declares whether at least one SCMI transport has been configured.
- Used to trigger a build bug when trying to build SCMI without any
- configured transport.
-
-config ARM_SCMI_HAVE_SHMEM
- bool
- help
- This declares whether a shared memory based transport for SCMI is
- available.
-
-config ARM_SCMI_HAVE_MSG
- bool
- help
- This declares whether a message passing based transport for SCMI is
- available.
-
-config ARM_SCMI_TRANSPORT_MAILBOX
- bool "SCMI transport based on Mailbox"
- depends on MAILBOX
- select ARM_SCMI_HAVE_TRANSPORT
- select ARM_SCMI_HAVE_SHMEM
- default y
- help
- Enable mailbox based transport for SCMI.
-
- If you want the ARM SCMI PROTOCOL stack to include support for a
- transport based on mailboxes, answer Y.
+source "drivers/firmware/arm_scmi/transports/Kconfig"
config ARM_SCMI_TRANSPORT_OPTEE
bool "SCMI transport based on OP-TEE service"
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0-only
+menu "SCMI Transport Drivers"
+
+config ARM_SCMI_HAVE_TRANSPORT
+ bool
+ help
+ This declares whether at least one SCMI transport has been configured.
+ Used to trigger a build bug when trying to build SCMI without any
+ configured transport.
+
+config ARM_SCMI_HAVE_SHMEM
+ bool
+ help
+ This declares whether a shared memory based transport for SCMI is
+ available.
+
+config ARM_SCMI_HAVE_MSG
+ bool
+ help
+ This declares whether a message passing based transport for SCMI is
+ available.
+
+config ARM_SCMI_TRANSPORT_MAILBOX
+ tristate "SCMI transport based on Mailbox"
+ depends on MAILBOX
+ select ARM_SCMI_HAVE_TRANSPORT
+ select ARM_SCMI_HAVE_SHMEM
+ default y
+ help
+ Enable mailbox based transport for SCMI.
+
+ If you want the ARM SCMI PROTOCOL stack to include support for a
+ transport based on mailboxes, answer Y.
+ This driver can also be built as a module. If so, the module
+ will be called scmi_transport_mailbox.
+
+endmenu
* System Control and Management Interface (SCMI) Message Mailbox Transport
* driver.
*
- * Copyright (C) 2019 ARM Ltd.
+ * Copyright (C) 2019-2024 ARM Ltd.
*/
#include <linux/err.h>
#include <linux/mailbox_client.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>
-#include "common.h"
+#include "../common.h"
/**
* struct scmi_mailbox - Structure representing a SCMI mailbox transport
#define client_to_scmi_mailbox(c) container_of(c, struct scmi_mailbox, cl)
+static struct scmi_transport_core_operations *core;
+
static void tx_prepare(struct mbox_client *cl, void *m)
{
struct scmi_mailbox *smbox = client_to_scmi_mailbox(cl);
- scmi_shmem_ops.tx_prepare(smbox->shmem, m, smbox->cinfo);
+ core->shmem->tx_prepare(smbox->shmem, m, smbox->cinfo);
}
static void rx_callback(struct mbox_client *cl, void *m)
* a previous timed-out reply which arrived late could be wrongly
* associated with the next pending transaction.
*/
- if (cl->knows_txdone && !scmi_shmem_ops.channel_free(smbox->shmem)) {
+ if (cl->knows_txdone &&
+ !core->shmem->channel_free(smbox->shmem)) {
dev_warn(smbox->cinfo->dev, "Ignoring spurious A2P IRQ !\n");
- scmi_bad_message_trace(smbox->cinfo,
- scmi_shmem_ops.read_header(smbox->shmem),
- MSG_MBOX_SPURIOUS);
+ core->bad_message_trace(smbox->cinfo,
+ core->shmem->read_header(smbox->shmem),
+ MSG_MBOX_SPURIOUS);
return;
}
- scmi_rx_callback(smbox->cinfo, scmi_shmem_ops.read_header(smbox->shmem), NULL);
+ core->rx_callback(smbox->cinfo,
+ core->shmem->read_header(smbox->shmem), NULL);
}
static bool mailbox_chan_available(struct device_node *of_node, int idx)
if (!smbox)
return -ENOMEM;
- smbox->shmem = scmi_shmem_ops.setup_iomap(cinfo, dev, tx, NULL);
+ smbox->shmem = core->shmem->setup_iomap(cinfo, dev, tx, NULL);
if (IS_ERR(smbox->shmem))
return PTR_ERR(smbox->shmem);
{
struct scmi_mailbox *smbox = cinfo->transport_info;
- scmi_shmem_ops.fetch_response(smbox->shmem, xfer);
+ core->shmem->fetch_response(smbox->shmem, xfer);
}
static void mailbox_fetch_notification(struct scmi_chan_info *cinfo,
{
struct scmi_mailbox *smbox = cinfo->transport_info;
- scmi_shmem_ops.fetch_notification(smbox->shmem, max_len, xfer);
+ core->shmem->fetch_notification(smbox->shmem, max_len, xfer);
}
static void mailbox_clear_channel(struct scmi_chan_info *cinfo)
struct mbox_chan *intr_chan;
int ret;
- scmi_shmem_ops.clear_channel(smbox->shmem);
+ core->shmem->clear_channel(smbox->shmem);
- if (!scmi_shmem_ops.channel_intr_enabled(smbox->shmem))
+ if (!core->shmem->channel_intr_enabled(smbox->shmem))
return;
if (smbox->chan_platform_receiver)
{
struct scmi_mailbox *smbox = cinfo->transport_info;
- return scmi_shmem_ops.poll_done(smbox->shmem, xfer);
+ return core->shmem->poll_done(smbox->shmem, xfer);
}
static const struct scmi_transport_ops scmi_mailbox_ops = {
.poll_done = mailbox_poll_done,
};
-const struct scmi_desc scmi_mailbox_desc = {
+static const struct scmi_desc scmi_mailbox_desc = {
.ops = &scmi_mailbox_ops,
.max_rx_timeout_ms = 30, /* We may increase this if required */
.max_msg = 20, /* Limited by MBOX_TX_QUEUE_LEN */
.max_msg_size = 128,
};
+
+static const struct of_device_id scmi_of_match[] = {
+ { .compatible = "arm,scmi" },
+ { /* Sentinel */ },
+};
+
+DEFINE_SCMI_TRANSPORT_DRIVER(scmi_mailbox, scmi_mailbox_driver,
+ scmi_mailbox_desc, scmi_of_match, core);
+module_platform_driver(scmi_mailbox_driver);
+
+MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>");
+MODULE_DESCRIPTION("SCMI Mailbox Transport driver");
+MODULE_LICENSE("GPL");
projects / users / hch / misc.git / commitdiff