linux-kernel - [PATCH v2] firmware: xilinx: Dont send linux address to get fpga config get status

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Message-ID: <20250207054951.1650534-1-nava.kishore.manne@amd.com>
Date: Fri, 7 Feb 2025 11:19:51 +0530
From: Nava kishore Manne <nava.kishore.manne@....com>
To: <michal.simek@....com>, <ronak.jain@....com>,
	<gregkh@...uxfoundation.org>, <jay.buddhabhatti@....com>,
	<srinivas.kandagatla@...aro.org>, <u.kleine-koenig@...libre.com>,
	<praveen.teja.kundanala@....com>, <siva.durga.prasad.paladugu@....com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] firmware: xilinx: Dont send linux address to get fpga config get status

From: Siva Durga Prasad Paladugu <siva.durga.prasad.paladugu@....com>

Fpga get config status just returns status through ret_payload and there
is no need to allocate local buf and send its address through SMC args.
Moreover, the address that is being passed till now is linux virtual
address and is incorrect.
Corresponding modification has been done in the firmware to avoid using the
address sent by linux.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.prasad.paladugu@....com>
Signed-off-by: Nava kishore Manne <nava.kishore.manne@....com>
---
Changes for v2:
 - Drop the specified patch:
   https://lore.kernel.org/lkml/DS7PR12MB6070A83267558A7D545E3383CDF72@DS7PR12MB6070.namprd12.prod.outlook.com/
 - Rebase the patch on v6.14-rc1 without any changes.

 drivers/firmware/xilinx/zynqmp.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 720fa8b5d8e9..7356e860e65c 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -1139,17 +1139,13 @@ EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);
 int zynqmp_pm_fpga_get_config_status(u32 *value)
 {
 	u32 ret_payload[PAYLOAD_ARG_CNT];
-	u32 buf, lower_addr, upper_addr;
 	int ret;
 
 	if (!value)
 		return -EINVAL;
 
-	lower_addr = lower_32_bits((u64)&buf);
-	upper_addr = upper_32_bits((u64)&buf);
-
 	ret = zynqmp_pm_invoke_fn(PM_FPGA_READ, ret_payload, 4,
-				  XILINX_ZYNQMP_PM_FPGA_CONFIG_STAT_OFFSET, lower_addr, upper_addr,
+				  XILINX_ZYNQMP_PM_FPGA_CONFIG_STAT_OFFSET, 0, 0,
 				  XILINX_ZYNQMP_PM_FPGA_READ_CONFIG_REG);
 
 	*value = ret_payload[1];
-- 
2.43.0