firmware: xilinx: Add RPU configuration APIs

This patch adds APIs to access to configure RPU and its
processor-specific memory.

That is query the run-time mode of RPU as either split or lockstep as well
as API to set this mode. In addition add APIs to access configuration of
the RPUs' tightly coupled memory (TCM).

Signed-off-by: Ben Levinsky <[email protected]>
Signed-off-by: Tanmay Shah <[email protected]>
Acked-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mathieu Poirier <[email protected]>

Author: bentheredonethat

drivers/firmware/xilinx/zynqmp.c

@@ -1159,6 +1159,68 @@ 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
+ * @rpu_mode:	return by reference value
+ *		either split or lockstep
+ *
+ * Return:	return 0 on success or error+reason.
+ *		if success, then  rpu_mode will be set
+ *		to current rpu mode.
+ */
+int zynqmp_pm_get_rpu_mode(u32 node_id, enum rpu_oper_mode *rpu_mode)
+{
+	u32 ret_payload[PAYLOAD_ARG_CNT];
+	int ret;
+
+	ret = zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
+				  IOCTL_GET_RPU_OPER_MODE, 0, 0, ret_payload);
+
+	/* only set rpu_mode if no error */
+	if (ret == XST_PM_SUCCESS)
+		*rpu_mode = ret_payload[0];
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_get_rpu_mode);
+
+/**
+ * zynqmp_pm_set_rpu_mode() - Set RPU mode
+ * @node_id:	Node ID of the device
+ * @rpu_mode:	Argument 1 to requested IOCTL call. either split or lockstep
+ *
+ *		This function is used to set RPU mode to split or
+ *		lockstep
+ *
+ * Return:	Returns status, either success or error+reason
+ */
+int zynqmp_pm_set_rpu_mode(u32 node_id, enum rpu_oper_mode rpu_mode)
+{
+	return zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
+				   IOCTL_SET_RPU_OPER_MODE, (u32)rpu_mode,
+				   0, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_rpu_mode);
+
+/**
+ * zynqmp_pm_set_tcm_config - configure TCM
+ * @node_id:	Firmware specific TCM subsystem ID
+ * @tcm_mode:	Argument 1 to requested IOCTL call
+ *              either PM_RPU_TCM_COMB or PM_RPU_TCM_SPLIT
+ *
+ * This function is used to set RPU mode to split or combined
+ *
+ * Return: status: 0 for success, else failure
+ */
+int zynqmp_pm_set_tcm_config(u32 node_id, enum rpu_tcm_comb tcm_mode)
+{
+	return zynqmp_pm_invoke_fn(PM_IOCTL, node_id,
+				   IOCTL_TCM_COMB_CONFIG, (u32)tcm_mode, 0,
+				   NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_set_tcm_config);
+
 /**
  * zynqmp_pm_force_pwrdwn - PM call to request for another PU or subsystem to
  *             be powered down forcefully

include/linux/firmware/xlnx-zynqmp.h

@@ -530,6 +530,9 @@ int zynqmp_pm_request_wake(const u32 node,
 			   const bool set_addr,
 			   const u64 address,
 			   const enum zynqmp_pm_request_ack ack);
+int zynqmp_pm_get_rpu_mode(u32 node_id, enum rpu_oper_mode *rpu_mode);
+int zynqmp_pm_set_rpu_mode(u32 node_id, u32 arg1);
+int zynqmp_pm_set_tcm_config(u32 node_id, u32 arg1);
 int zynqmp_pm_set_sd_config(u32 node, enum pm_sd_config_type config, u32 value);
 int zynqmp_pm_set_gem_config(u32 node, enum pm_gem_config_type config,
 			     u32 value);
@@ -818,6 +821,21 @@ static inline int zynqmp_pm_request_wake(const u32 node,
 	return -ENODEV;
 }
 
+static inline int zynqmp_pm_get_rpu_mode(u32 node_id, enum rpu_oper_mode *rpu_mode)
+{
+	return -ENODEV;
+}
+
+static inline int zynqmp_pm_set_rpu_mode(u32 node_id, u32 arg1)
+{
+	return -ENODEV;
+}
+
+static inline int zynqmp_pm_set_tcm_config(u32 node_id, u32 arg1)
+{
+	return -ENODEV;
+}
+
 static inline int zynqmp_pm_set_sd_config(u32 node,
 					  enum pm_sd_config_type config,
 					  u32 value)