From: Faizal Rahim Date: Tue, 18 Mar 2025 03:07:35 +0000 (-0400) Subject: igc: optimize TX packet buffer utilization for TSN mode X-Git-Tag: v6.16-rc1~132^2~230^2~7 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d58cdc902dace2298406b3972def04f55e3d775;p=thirdparty%2Flinux.git igc: optimize TX packet buffer utilization for TSN mode In preparation for upcoming frame preemption patches, optimize the TX packet buffer size. The total packet buffer size (RX + TX) is 64KB, with a maximum of 34KB for either RX or TX. Split the buffer evenly, allocating 32KB to each. For TX, assign 7KB to each of the four TX packet buffers (total 28KB) and reserve 4KB for BMC. References: I225/I226 SW User Manual Section 4.7.9, Section 8.3.2 Co-developed-by: Vinicius Costa Gomes Signed-off-by: Vinicius Costa Gomes Signed-off-by: Faizal Rahim Tested-by: Mor Bar-Gabay Signed-off-by: Tony Nguyen --- diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h index ec8f926362eb3..5502edd6261f4 100644 --- a/drivers/net/ethernet/intel/igc/igc_defines.h +++ b/drivers/net/ethernet/intel/igc/igc_defines.h @@ -419,8 +419,8 @@ IGC_TXPB0SIZE(20) | IGC_TXPB1SIZE(0) | IGC_TXPB2SIZE(0) | \ IGC_TXPB3SIZE(0) | IGC_OS2BMCPBSIZE(4)) #define IGC_TXPBSIZE_TSN ( \ - IGC_TXPB0SIZE(5) | IGC_TXPB1SIZE(5) | IGC_TXPB2SIZE(5) | \ - IGC_TXPB3SIZE(5) | IGC_OS2BMCPBSIZE(4)) + IGC_TXPB0SIZE(7) | IGC_TXPB1SIZE(7) | IGC_TXPB2SIZE(7) | \ + IGC_TXPB3SIZE(7) | IGC_OS2BMCPBSIZE(4)) #define IGC_DTXMXPKTSZ_TSN 0x19 /* 1600 bytes of max TX DMA packet size */ #define IGC_DTXMXPKTSZ_DEFAULT 0x98 /* 9728-byte Jumbo frames */