The branch main has been updated by kbowling: URL: https://cgit.FreeBSD.org/src/commit/?id=ab540d44ba3201ff8313b90ba0096004603b2e34
commit ab540d44ba3201ff8313b90ba0096004603b2e34 Author: Kevin Bowling <[email protected]> AuthorDate: 2024-11-21 02:38:01 +0000 Commit: Kevin Bowling <[email protected]> CommitDate: 2024-11-21 02:38:01 +0000 igc: sysctl for TCP flag handling during TSO Add tso_tcp_flags_mask_first_segment, tso_tcp_flags_mask_middle_segment, and tso_tcp_flags_mask_last_segment sysctl-variables to control the handling of TCP flags during TSO. This allows to change the masks appropriate for classical ECN and to configure appropriate masks for accurate ECN. MFC after: 3 days Sponsored by: Netflix --- sys/dev/igc/if_igc.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++ sys/dev/igc/igc_regs.h | 2 ++ 2 files changed, 61 insertions(+) diff --git a/sys/dev/igc/if_igc.c b/sys/dev/igc/if_igc.c index 38fb1406b1c1..9a4d0b2dd0ac 100644 --- a/sys/dev/igc/if_igc.c +++ b/sys/dev/igc/if_igc.c @@ -127,6 +127,7 @@ static void igc_print_debug_info(struct igc_softc *); static int igc_is_valid_ether_addr(u8 *); static void igc_neweitr(struct igc_softc *, struct igc_rx_queue *, struct tx_ring *, struct rx_ring *); +static int igc_sysctl_tso_tcp_flags_mask(SYSCTL_HANDLER_ARGS); /* Management and WOL Support */ static void igc_get_hw_control(struct igc_softc *); static void igc_release_hw_control(struct igc_softc *); @@ -497,6 +498,27 @@ igc_if_attach_pre(if_ctx_t ctx) CTLTYPE_INT | CTLFLAG_RW, sc, 0, igc_sysctl_dmac, "I", "DMA Coalesce"); + SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), + SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), + OID_AUTO, "tso_tcp_flags_mask_first_segment", + CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, + sc, 0, igc_sysctl_tso_tcp_flags_mask, "IU", + "TSO TCP flags mask for first segment"); + + SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), + SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), + OID_AUTO, "tso_tcp_flags_mask_middle_segment", + CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, + sc, 1, igc_sysctl_tso_tcp_flags_mask, "IU", + "TSO TCP flags mask for middle segment"); + + SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), + SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), + OID_AUTO, "tso_tcp_flags_mask_last_segment", + CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, + sc, 2, igc_sysctl_tso_tcp_flags_mask, "IU", + "TSO TCP flags mask for last segment"); + /* Determine hardware and mac info */ igc_identify_hardware(ctx); @@ -3013,6 +3035,43 @@ igc_print_nvm_info(struct igc_softc *sc) printf("\n"); } +static int +igc_sysctl_tso_tcp_flags_mask(SYSCTL_HANDLER_ARGS) +{ + struct igc_softc *sc; + u32 reg, val, shift; + int error, mask; + + sc = oidp->oid_arg1; + switch (oidp->oid_arg2) { + case 0: + reg = IGC_DTXTCPFLGL; + shift = 0; + break; + case 1: + reg = IGC_DTXTCPFLGL; + shift = 16; + break; + case 2: + reg = IGC_DTXTCPFLGH; + shift = 0; + break; + default: + return (EINVAL); + break; + } + val = IGC_READ_REG(&sc->hw, reg); + mask = (val >> shift) & 0xfff; + error = sysctl_handle_int(oidp, &mask, 0, req); + if (error != 0 || req->newptr == NULL) + return (error); + if (mask < 0 || mask > 0xfff) + return (EINVAL); + val = (val & ~(0xfff << shift)) | (mask << shift); + IGC_WRITE_REG(&sc->hw, reg, val); + return (0); +} + /* * Set flow control using sysctl: * Flow control values: diff --git a/sys/dev/igc/igc_regs.h b/sys/dev/igc/igc_regs.h index 26614dc33df6..17fa89e492e8 100644 --- a/sys/dev/igc/igc_regs.h +++ b/sys/dev/igc/igc_regs.h @@ -145,6 +145,8 @@ #define IGC_FFVT_REG(_i) (0x09800 + ((_i) * 8)) #define IGC_FFLT_REG(_i) (0x05F00 + ((_i) * 8)) #define IGC_TXPBS 0x03404 /* Tx Packet Buffer Size - RW */ +#define IGC_DTXTCPFLGL 0x0359C /* DMA Tx Control flag low - RW */ +#define IGC_DTXTCPFLGH 0x035A0 /* DMA Tx Control flag high - RW */ /* Statistics Register Descriptions */ #define IGC_CRCERRS 0x04000 /* CRC Error Count - R/clr */ #define IGC_ALGNERRC 0x04004 /* Alignment Error Count - R/clr */
