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Date:   Mon, 18 Jan 2021 08:13:16 +0530
From:   Nava kishore Manne <nava.manne@...inx.com>
To:     <mdf@...nel.org>, <trix@...hat.com>, <robh+dt@...nel.org>,
        <michal.simek@...inx.com>, <linux-fpga@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <git@...inx.com>, <chinnikishore369@...il.com>,
        Nava kishore Manne <nava.manne@...inx.com>
Subject: [PATCH 1/3] drivers: firmware: Add Pdi load API support

This patch adds load pdi api support to enable pdi/partial loading from
linux. Programmable Device Image (PDI) is combination of headers, images
and bitstream files to be loaded. Partial PDI is partial set of image/
images to be loaded.

Signed-off-by: Nava kishore Manne <nava.manne@...inx.com>
---
 drivers/firmware/xilinx/zynqmp.c     | 17 +++++++++++++++++
 include/linux/firmware/xlnx-zynqmp.h |  9 +++++++++
 2 files changed, 26 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 7eb9958662dd..a466225b9f9e 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -897,6 +897,23 @@ int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
 }
 EXPORT_SYMBOL_GPL(zynqmp_pm_set_requirement);
 
+/**
+ * zynqmp_pm_load_pdi - Load and process pdi
+ * @src:       Source device where PDI is located
+ * @address:   Pdi src address
+ *
+ * This function provides support to load pdi from linux
+ *
+ * Return: Returns status, either success or error+reason
+ */
+int zynqmp_pm_load_pdi(const u32 src, const u64 address)
+{
+	return zynqmp_pm_invoke_fn(PM_LOAD_PDI, src,
+				   lower_32_bits(address),
+				   upper_32_bits(address), 0, NULL);
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_load_pdi);
+
 /**
  * zynqmp_pm_aes - Access AES hardware to encrypt/decrypt the data using
  * AES-GCM core.
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 2a0da841c942..87114ee645b1 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -52,6 +52,9 @@
 #define	ZYNQMP_PM_CAPABILITY_WAKEUP	0x4U
 #define	ZYNQMP_PM_CAPABILITY_UNUSABLE	0x8U
 
+/* Loader commands */
+#define PM_LOAD_PDI	0x701
+
 /*
  * Firmware FPGA Manager flags
  * XILINX_ZYNQMP_PM_FPGA_FULL:	FPGA full reconfiguration
@@ -354,6 +357,7 @@ int zynqmp_pm_write_pggs(u32 index, u32 value);
 int zynqmp_pm_read_pggs(u32 index, u32 *value);
 int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype);
 int zynqmp_pm_set_boot_health_status(u32 value);
+int zynqmp_pm_load_pdi(const u32 src, const u64 address);
 #else
 static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void)
 {
@@ -538,6 +542,11 @@ static inline int zynqmp_pm_set_boot_health_status(u32 value)
 {
 	return -ENODEV;
 }
+
+static inline int zynqmp_pm_load_pdi(const u32 src, const u64 address)
+{
+	return -ENODEV;
+}
 #endif
 
 #endif /* __FIRMWARE_ZYNQMP_H__ */
-- 
2.18.0

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