[PATCH v4 10/16] firmware: arm_scmi: Add per-device transport private info
From: Cristian Marussi <cristian.marussi@arm.com>
Date: 2021-06-11 17:01:04
Also in:
lkml
Subsystem:
system control & power/management interface (scpi/scmi) message protocol drivers, the rest · Maintainers:
Sudeep Holla, Linus Torvalds
From: Peter Hilber <redacted> The scmi-virtio transport will link a supplier device to the arm-scmi device in the link_supplier() op. The transport should then save a pointer to the linked device. To enable this, add a transport private info to the scmi_info. (The scmi_info is already reachable through the arm-scmi device driver_data.) Signed-off-by: Peter Hilber <redacted> --- drivers/firmware/arm_scmi/common.h | 2 ++ drivers/firmware/arm_scmi/driver.c | 35 ++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+)
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index a31194b3000a..7219970fc5eb 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h@@ -389,6 +389,8 @@ extern const struct scmi_desc scmi_mailbox_desc; extern const struct scmi_desc scmi_smc_desc; #endif +int scmi_set_transport_info(struct device *dev, void *transport_info); +void *scmi_get_transport_info(struct device *dev); void scmi_rx_callback(struct scmi_chan_info *cinfo, u32 msg_hdr); void scmi_free_channel(struct scmi_chan_info *cinfo, struct idr *idr, int id);
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 69fa97250d98..bb2de15554a9 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c@@ -138,6 +138,7 @@ struct scmi_protocol_instance { * @active_protocols: IDR storing device_nodes for protocols actually defined * in the DT and confirmed as implemented by fw. * @notify_priv: Pointer to private data structure specific to notifications. + * @transport_info: Transport private info * @node: List head * @users: Number of users of this instance */
@@ -156,6 +157,7 @@ struct scmi_info { u8 *protocols_imp; struct idr active_protocols; void *notify_priv; + void *transport_info; struct list_head node; int users; };
@@ -679,6 +681,39 @@ void scmi_rx_callback(struct scmi_chan_info *cinfo, u32 msg_hdr) } } +/** + * scmi_set_transport_info() - Set transport private info + * + * @dev: SCMI instance device + * @transport_info: transport private info + * + * Return: 0 on success, otherwise error. + */ +int scmi_set_transport_info(struct device *dev, void *transport_info) +{ + struct scmi_info *info = dev_get_drvdata(dev); + + if (!info) + return -EBADR; + + info->transport_info = transport_info; + return 0; +} + +/** + * scmi_get_transport_info() - Get transport private info + * + * @dev: SCMI instance device + * + * Return: transport private info on success, otherwise NULL. + */ +void *scmi_get_transport_info(struct device *dev) +{ + struct scmi_info *info = dev_get_drvdata(dev); + + return info ? info->transport_info : NULL; +} + /** * xfer_put() - Release a transmit message *
--
2.17.1
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