linux-kernel - [PATCH v5 1/3] firmware: xilinx: Add fpga API's

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Date:   Mon, 15 Apr 2019 12:47:46 +0530
From:   Nava kishore Manne <nava.manne@...inx.com>
To:     <atull@...nel.org>, <mdf@...nel.org>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <michal.simek@...inx.com>,
        <rajanv@...inx.com>, <jollys@...inx.com>, <nava.manne@...inx.com>,
        <linux-fpga@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <chinnikishore369@...il.com>
Subject: [PATCH v5 1/3] firmware: xilinx: Add fpga API's

This Patch Adds fpga API's to support the Bitstream loading
by using firmware interface.

Signed-off-by: Nava kishore Manne <nava.manne@...inx.com>
Reviewed-by: Moritz Fischer <mdf@...nel.org>
---
Changes for v5:
		-Modified API's doc as suggested by Moritz.

 drivers/firmware/xilinx/zynqmp.c     | 45 ++++++++++++++++++++++++++++
 include/linux/firmware/xlnx-zynqmp.h | 12 ++++++++
 2 files changed, 57 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 98f936125643..f355ad42917c 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -537,6 +537,49 @@ static int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset,
 	return ret;
 }
 
+/*
+ * zynqmp_pm_fpga_load - Perform the fpga load
+ * @address:	Address to write to
+ * @size:	pl bitstream size
+ * @flags:	Bitstream type
+ *	-XILINX_ZYNQMP_PM_FPGA_FULL:  FPGA full reconfiguration
+ *	-XILINX_ZYNQMP_PM_FPGA_PARTIAL: FPGA partial reconfiguration
+ *
+ * This function provides access to pmufw. To transfer
+ * the required bitstream into PL.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_fpga_load(const u64 address, const u32 size,
+			       const u32 flags)
+{
+	return zynqmp_pm_invoke_fn(PM_FPGA_LOAD, lower_32_bits(address),
+				   upper_32_bits(address), size, flags, NULL);
+}
+
+/**
+ * zynqmp_pm_fpga_get_status - Read value from PCAP status register
+ * @value: Value to read
+ *
+ * This function provides access to the pmufw to get the PCAP
+ * status
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_fpga_get_status(u32 *value)
+{
+	u32 ret_payload[PAYLOAD_ARG_CNT];
+	int ret;
+
+	if (!value)
+		return -EINVAL;
+
+	ret = zynqmp_pm_invoke_fn(PM_FPGA_GET_STATUS, 0, 0, 0, 0, ret_payload);
+	*value = ret_payload[1];
+
+	return ret;
+}
+
 /**
  * zynqmp_pm_init_finalize() - PM call to inform firmware that the caller
  *			       master has initialized its own power management
@@ -640,6 +683,8 @@ static const struct zynqmp_eemi_ops eemi_ops = {
 	.request_node = zynqmp_pm_request_node,
 	.release_node = zynqmp_pm_release_node,
 	.set_requirement = zynqmp_pm_set_requirement,
+	.fpga_load = zynqmp_pm_fpga_load,
+	.fpga_get_status = zynqmp_pm_fpga_get_status,
 };
 
 /**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 642dab10f65d..1b1de5539036 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -48,6 +48,14 @@
 #define	ZYNQMP_PM_CAPABILITY_WAKEUP	0x4U
 #define	ZYNQMP_PM_CAPABILITY_POWER	0x8U
 
+/*
+ * Firmware FPGA Manager flags
+ * XILINX_ZYNQMP_PM_FPGA_FULL:	FPGA full reconfiguration
+ * XILINX_ZYNQMP_PM_FPGA_PARTIAL: FPGA partial reconfiguration
+ */
+#define XILINX_ZYNQMP_PM_FPGA_FULL	0x0U
+#define XILINX_ZYNQMP_PM_FPGA_PARTIAL	BIT(0)
+
 enum pm_api_id {
 	PM_GET_API_VERSION = 1,
 	PM_REQUEST_NODE = 13,
@@ -56,6 +64,8 @@ enum pm_api_id {
 	PM_RESET_ASSERT = 17,
 	PM_RESET_GET_STATUS,
 	PM_PM_INIT_FINALIZE = 21,
+	PM_FPGA_LOAD,
+	PM_FPGA_GET_STATUS,
 	PM_GET_CHIPID = 24,
 	PM_IOCTL = 34,
 	PM_QUERY_DATA,
@@ -258,6 +268,8 @@ struct zynqmp_pm_query_data {
 struct zynqmp_eemi_ops {
 	int (*get_api_version)(u32 *version);
 	int (*get_chipid)(u32 *idcode, u32 *version);
+	int (*fpga_load)(const u64 address, const u32 size, const u32 flags);
+	int (*fpga_get_status)(u32 *value);
 	int (*query_data)(struct zynqmp_pm_query_data qdata, u32 *out);
 	int (*clock_enable)(u32 clock_id);
 	int (*clock_disable)(u32 clock_id);
-- 
2.18.0