diff mbox series

[net-next,08/14] igc: use FIELD_PREP and GENMASK for existing RX packet buffer size

Message ID 20250418163822.3519810-9-anthony.l.nguyen@intel.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series igc: Add support for Frame Preemption | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 2 this patch: 2
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: line length of 89 exceeds 80 columns WARNING: line length of 99 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2025-04-19--18-00 (tests: 916)

Commit Message

Tony Nguyen April 18, 2025, 4:38 p.m. UTC 
From: Faizal Rahim <faizal.abdul.rahim@linux.intel.com>

Prepare for an upcoming patch that modifies the RX buffer size in TSN mode.
Refactor IGC_RXPBSIZE_EXP_BMC_DEFAULT and IGC_RXPBS_CFG_TS_EN using
FIELD_PREP and GENMASK to improve clarity and maintainability. Refactor
both macros for consistency, even though the upcoming patch only use
IGC_RXPBSIZE_EXP_BMC_DEFAULT.

The newly introduced macros follow the naming from the i226 SW User Manual
for easy reference.

I've tested IGC_RXPBSIZE_EXP_BMC_DEFAULT and IGC_RXPBS_CFG_TS_EN before
and after the refactoring, and their values remain unchanged.

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Faizal Rahim <faizal.abdul.rahim@linux.intel.com>
Tested-by: Mor Bar-Gabay <morx.bar.gabay@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_defines.h | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h
index 5502edd6261f..12a16a7acb03 100644
--- a/drivers/net/ethernet/intel/igc/igc_defines.h
+++ b/drivers/net/ethernet/intel/igc/igc_defines.h
@@ -396,9 +396,20 @@ 
 #define IGC_RCTL_PMCF		0x00800000 /* pass MAC control frames */
 #define IGC_RCTL_SECRC		0x04000000 /* Strip Ethernet CRC */
 
-/* RXPBSIZE default value for Express and BMC buffer */
-#define IGC_RXPBSIZE_EXP_BMC_DEFAULT	0x000000A2
-#define IGC_RXPBS_CFG_TS_EN		0x80000000 /* Timestamp in Rx buffer */
+/* Mask for RX packet buffer size */
+#define IGC_RXPBSIZE_EXP_MASK		GENMASK(5, 0)
+#define IGC_BMC2OSPBSIZE_MASK		GENMASK(11, 6)
+/* Mask for timestamp in RX buffer */
+#define IGC_RXPBS_CFG_TS_EN_MASK	GENMASK(31, 31)
+/* High-priority RX packet buffer size (KB). Used for Express traffic when preemption is enabled */
+#define IGC_RXPBSIZE_EXP(x)		FIELD_PREP(IGC_RXPBSIZE_EXP_MASK, (x))
+/* BMC to OS packet buffer size in KB */
+#define IGC_BMC2OSPBSIZE(x)		FIELD_PREP(IGC_BMC2OSPBSIZE_MASK, (x))
+/* Enable RX packet buffer for timestamp descriptor, saving 16 bytes per packet if set */
+#define IGC_RXPBS_CFG_TS_EN		FIELD_PREP(IGC_RXPBS_CFG_TS_EN_MASK, 1)
+/* Default value following I225/I226 SW User Manual Section 8.3.1 */
+#define IGC_RXPBSIZE_EXP_BMC_DEFAULT ( \
+	IGC_RXPBSIZE_EXP(34) | IGC_BMC2OSPBSIZE(2))
 
 /* Mask for TX packet buffer size */
 #define IGC_TXPB0SIZE_MASK		GENMASK(5, 0)