netdev - [PATCH iwl-next v2 1/2] ixgbe: e610: Convert ACI descriptor buffer to little endian

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Message-ID: <20260122164632.112607-1-piotr.kwapulinski@intel.com>
Date: Thu, 22 Jan 2026 17:46:32 +0100
From: Piotr Kwapulinski <piotr.kwapulinski@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	dan.carpenter@...aro.org,
	horms@...nel.org,
	pmenzel@...gen.mpg.de,
	Piotr Kwapulinski <piotr.kwapulinski@...el.com>,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Subject: [PATCH iwl-next v2 1/2] ixgbe: e610: Convert ACI descriptor buffer to little endian

The ixgbe device registers/descriptors expect little-endian ordering. Make
the code aware that the e610 adapter operates on data with little endian
ordering. The extra conversion is required on big-endian hosts. In most
scenarios this conversion is not required.

Fixes: 46761fd52a88 ("ixgbe: Add support for E610 FW Admin Command Interface")
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Signed-off-by: Piotr Kwapulinski <piotr.kwapulinski@...el.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c
index c2f8189..f494e90 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c
@@ -113,7 +113,8 @@ static int ixgbe_aci_send_cmd_execute(struct ixgbe_hw *hw,
 
 	/* Descriptor is written to specific registers */
 	for (i = 0; i < IXGBE_ACI_DESC_SIZE_IN_DWORDS; i++)
-		IXGBE_WRITE_REG(hw, IXGBE_PF_HIDA(i), raw_desc[i]);
+		IXGBE_WRITE_REG(hw, IXGBE_PF_HIDA(i),
+				le32_to_cpu(raw_desc[i]));
 
 	/* SW has to set PF_HICR.C bit and clear PF_HICR.SV and
 	 * PF_HICR_EV
@@ -145,7 +146,7 @@ static int ixgbe_aci_send_cmd_execute(struct ixgbe_hw *hw,
 	if ((hicr & IXGBE_PF_HICR_SV)) {
 		for (i = 0; i < IXGBE_ACI_DESC_SIZE_IN_DWORDS; i++) {
 			raw_desc[i] = IXGBE_READ_REG(hw, IXGBE_PF_HIDA(i));
-			raw_desc[i] = raw_desc[i];
+			raw_desc[i] = cpu_to_le32(raw_desc[i]);
 		}
 	}
 
@@ -153,7 +154,7 @@ static int ixgbe_aci_send_cmd_execute(struct ixgbe_hw *hw,
 	if ((hicr & IXGBE_PF_HICR_EV) && !(hicr & IXGBE_PF_HICR_C)) {
 		for (i = 0; i < IXGBE_ACI_DESC_SIZE_IN_DWORDS; i++) {
 			raw_desc[i] = IXGBE_READ_REG(hw, IXGBE_PF_HIDA_2(i));
-			raw_desc[i] = raw_desc[i];
+			raw_desc[i] = cpu_to_le32(raw_desc[i]);
 		}
 	}
 
-- 
2.47.1