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igc: use FIELD_PREP and GENMASK for existing RX packet buffer size

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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>
This commit is contained in:
Faizal Rahim 2025-03-17 23:07:36 -04:00 committed by Tony Nguyen
parent 0d58cdc902
commit 9cd87aafc7
1 changed files with 14 additions and 3 deletions
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17
drivers/net/ethernet/intel/igc/igc_defines.h
View File

@ -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)