Hi Tom,

	Please fix my response inline.

-----Original Message-----
From: Tom Rix <trix@redhat.com>
Sent: Wednesday, July 7, 2021 2:34 AM
To: Nava kishore Manne <redacted>; robh+dt@kernel.org; Michal
Simek [off-list ref]; mdf@kernel.org; arnd@arndb.de; Rajan Vaja
[off-list ref]; gregkh@linuxfoundation.org; Amit Sunil Dhamne
[off-list ref]; Tejas Patel [off-list ref];
zou_wei@huawei.com; Sai Krishna Potthuri [off-list ref]; Ravi
Patel [off-list ref]; iwamatsu@nigauri.org; Jiaying Liang
[off-list ref]; devicetree@vger.kernel.org; linux-arm-
kernel@lists.infradead.org; linux-kernel@vger.kernel.org; linux-
fpga@vger.kernel.org; git [off-list ref]; chinnikishore369@gmail.com
Subject: Re: [PATCH v8 1/5] drivers: firmware: Add PDI load API support


On 6/26/21 8:52 AM, Nava kishore Manne wrote:

quoted

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 <redacted>
Reviewed-by: Moritz Fischer <mdf@kernel.org>
---
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.

Changes for v6:
               -None.

Changes for v7:
               -None.

Changes for v8:
                -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,

quoted

  }
  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

quoted

   * 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

This should be defined in enum pm_api_id

quoted

+#define PDI_SRC_DDR	0xF

This is only used by versal_fpga_ops_write(), consider moving the #define to
versal-fpga.c

Yes, currently only versal_fpga_write() is using this #define but it’s a generic thing for Versal platform
That’s why we placed it here.

Regards,
Navakishore. 

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