[PATCH v6 3/5] firmware: xilinx: Add RPU configuration APIs

Ben Levinsky
2020-07-15T15:33:44Z

This patch adds APIs to provide access and a configuration interface
to the current power state of a sub-system on Zynqmp sub-system.

Signed-off-by: Ben Levinsky <ben.levinsky@xilinx.com>
---
v3:
- add xilinx-related platform mgmt fn's instead of wrapping around
function pointer in xilinx eemi ops struct
v4:
- add default values for enums
---
drivers/firmware/xilinx/zynqmp.c | 99 ++++++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 34 ++++++++++
2 files changed, 133 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index f1a0bd35deeb..fdd61d258e55 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -846,6 +846,61 @@ int zynqmp_pm_release_node(const u32 node)
}
EXPORT_SYMBOL_GPL(zynqmp_pm_release_node);

+/**
+ * zynqmp_pm_get_rpu_mode() - Get RPU mode
+ * @node_id: Node ID of the device
+ * @arg1: Argument 1 to requested IOCTL call
+ * @arg2: Argument 2 to requested IOCTL call
+ * @out: Returned output value
+ *
+ * Return: RPU mode
+ */
+int zynqmp_pm_get_rpu_mode(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out)
+{
+ return zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
+ IOCTL_GET_RPU_OPER_MODE, 0, 0, out);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_get_rpu_mode);
+
+/**
+ * zynqmp_pm_set_rpu_mode() - Set RPU mode
+ * @node_id: Node ID of the device
+ * @ioctl_id: ID of the requested IOCTL
+ * @arg2: Argument 2 to requested IOCTL call
+ * @out: Returned output value
+ *
+ * This function is used to set RPU mode.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_set_rpu_mode(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out)
+{
+ return zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
+ IOCTL_SET_RPU_OPER_MODE, 0, 0, out);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_rpu_mode);
+
+/**
+ * zynqmp_pm_tcm_comb_config - configure TCM
+ * @node_id: Node ID of the device
+ * @arg1: Argument 1 to requested IOCTL call
+ * @arg2: Argument 2 to requested IOCTL call
+ * @out: Returned output value
+ *
+ * This function is used to set RPU mode.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_set_tcm_config(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out)
+{
+ return zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
+ IOCTL_TCM_COMB_CONFIG, 0, 0, out);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_tcm_config);
+
/**
* zynqmp_pm_force_powerdown - PM call to request for another PU or subsystem to
* be powered down forcefully
@@ -881,6 +936,50 @@ int zynqmp_pm_request_wakeup(const u32 node,
}
EXPORT_SYMBOL_GPL(zynqmp_pm_request_wakeup);

+/**
+ * zynqmp_pm_get_node_status - PM call to request a node's current power state
+ * @node: ID of the component or sub-system in question
+ * @status: Current operating state of the requested node
+ * @requirements: Current requirements asserted on the node,
+ * used for slave nodes only.
+ * @usage: Usage information, used for slave nodes only:
+ * PM_USAGE_NO_MASTER - No master is currently using
+ * the node
+ * PM_USAGE_CURRENT_MASTER - Only requesting master is
+ * currently using the node
+ * PM_USAGE_OTHER_MASTER - Only other masters are
+ * currently using the node
+ * PM_USAGE_BOTH_MASTERS - Both the current and at least
+ * one other master is currently
+ * using the node
+ *
+ * Return: status, either success or error+reason
+ */
+int zynqmp_pm_get_node_status(const u32 node,
+ u32 *status, u32 *requirements,
+ u32 *usage)
+
+{
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ if (!status)
+ return -EINVAL;
+
+ ret = zynqmp_pm_invoke_fn(PM_GET_NODE_STATUS, node, 0, 0, 0,
+ ret_payload);
+ if (ret_payload[0] == XST_PM_SUCCESS) {
+ *status = ret_payload[1];
+ if (requirements)
+ *requirements = ret_payload[2];
+ if (usage)
+ *usage = ret_payload[3];
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_get_node_status);
+
/**
* zynqmp_pm_set_requirement() - PM call to set requirement for PM slaves
* @node: Node ID of the slave
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 4d83a7d69c4c..0caca9e2223a 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -64,6 +64,7 @@

enum pm_api_id {
PM_GET_API_VERSION = 1,
+ PM_GET_NODE_STATUS = 3,
PM_FORCE_POWERDOWN = 8,
PM_REQUEST_WAKEUP = 10,
PM_SYSTEM_SHUTDOWN = 12,
@@ -384,6 +385,14 @@ int zynqmp_pm_request_wakeup(const u32 node,
const bool set_addr,
const u64 address,
const enum zynqmp_pm_request_ack ack);
+int zynqmp_pm_get_node_status(const u32 node, u32 *status,
+ u32 *requirements, u32 *usage);
+int zynqmp_pm_get_rpu_mode(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out);
+int zynqmp_pm_set_rpu_mode(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out);
+int zynqmp_pm_set_tcm_config(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out);
#else
static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
{
@@ -548,6 +557,31 @@ static inline int zynqmp_pm_request_wakeup(const u32 node,
{
return -ENODEV;
}
+
+static inline int zynqmp_pm_get_node_status(const u32 node,
+ u32 *status, u32 *requirements,
+ u32 *usage)
+{
+ return -ENODEV;
+}
+
+static inline int zynqmp_pm_get_rpu_mode(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out)
+{
+ return -ENODEV;
+}
+
+static inline int zynqmp_pm_set_rpu_mode(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out)
+{
+ return -ENODEV;
+}
+
+static inline int zynqmp_pm_set_tcm_config(u32 node_id,
+ u32 arg1, u32 arg2, u32 *out)
+{
+ return -ENODEV;
+}
#endif

#endif /* __FIRMWARE_ZYNQMP_H__ */
--
2.17.1