linux-kernel - [PATCH v5 1/4] drivers: firmware: Add PDI load API support

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Message-ID: <20210512125042.30973-2-nava.manne@xilinx.com>
Date:   Wed, 12 May 2021 18:20:39 +0530
From:   Nava kishore Manne <nava.manne@...inx.com>
To:     <robh+dt@...nel.org>, <michal.simek@...inx.com>, <mdf@...nel.org>,
        <trix@...hat.com>, <nava.manne@...inx.com>, <arnd@...db.de>,
        <rajan.vaja@...inx.com>, <gregkh@...uxfoundation.org>,
        <amit.sunil.dhamne@...inx.com>, <tejas.patel@...inx.com>,
        <zou_wei@...wei.com>, <lakshmi.sai.krishna.potthuri@...inx.com>,
        <ravi.patel@...inx.com>, <iwamatsu@...auri.org>,
        <wendy.liang@...inx.com>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-fpga@...r.kernel.org>,
        <git@...inx.com>, <chinnikishore369@...il.com>
Subject: [PATCH v5 1/4] drivers: firmware: Add PDI load API support

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

Signed-off-by: Nava kishore Manne <nava.manne@...inx.com>
---
Changes for v2:
                -Updated API Doc and commit msg.
                 No functional changes.
Changes for v3:
                -None.
Changes for v4:
                -Rebased the changes on linux-next.
                 No functional changes
Changes for v5:
                -None.

 drivers/firmware/xilinx/zynqmp.c     | 17 +++++++++++++++++
 include/linux/firmware/xlnx-zynqmp.h | 10 ++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 15b138326ecc..2db571da9ad8 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -1011,6 +1011,23 @@ 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 9d1a5c175065..56b426fe020c 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -52,6 +52,10 @@
 #define	ZYNQMP_PM_CAPABILITY_WAKEUP	0x4U
 #define	ZYNQMP_PM_CAPABILITY_UNUSABLE	0x8U
 
+/* Loader commands */
+#define PM_LOAD_PDI	0x701
+#define PDI_SRC_DDR	0xF
+
 /*
  * Firmware FPGA Manager flags
  * XILINX_ZYNQMP_PM_FPGA_FULL:	FPGA full reconfiguration
@@ -411,6 +415,7 @@ int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param,
 				 u32 *value);
 int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
 				 u32 value);
+int zynqmp_pm_load_pdi(const u32 src, const u64 address);
 #else
 static inline int zynqmp_pm_get_api_version(u32 *version)
 {
@@ -622,6 +627,11 @@ static inline int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param,
 {
 	return -ENODEV;
 }
+
+static inline int zynqmp_pm_load_pdi(const u32 src, const u64 address)
+{
+	return -ENODEV;
+}
 #endif
 
 #endif /* __FIRMWARE_ZYNQMP_H__ */
-- 
2.17.1