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Message-Id: <1587421629-914-4-git-send-email-ben.levinsky@xilinx.com>
Date: Mon, 20 Apr 2020 15:27:07 -0700
From: Ben Levinsky <ben.levinsky@...inx.com>
To: ohad@...ery.com, bjorn.andersson@...aro.org,
michal.simek@...inx.com, jollys@...inx.com, rajan.vaja@...inx.com,
robh+dt@...nel.org, mark.rutland@....com
Cc: linux-remoteproc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v3 3/5] firmware: xilinx: Add RPU configuration APIs
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@...inx.com>
---
changes since v2:
- add xilinx-related platform mgmt fn's instead of wrapping around
function pointer in xilinx eemi ops struct
---
drivers/firmware/xilinx/zynqmp.c | 101 +++++++++++++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 30 +++++++++++
2 files changed, 131 insertions(+)
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index b0d140f..e0a906e 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -845,6 +845,63 @@ 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: Returns 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
* @target: Node ID of the targeted PU or subsystem
@@ -880,6 +937,50 @@ 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: Returns 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
* @capabilities: Requested capabilities of the slave
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 1235923..c123d1b 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)
{
@@ -546,6 +555,27 @@ 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__ */
--
2.7.4
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