git: aca67c37a521 - main - dwc: add transmit checksum offload for IPv6

The branch main has been updated by tuexen:

URL: https://cgit.FreeBSD.org/src/commit/?id=aca67c37a5215448828a2974a2ff44e75e9159bc

commit aca67c37a5215448828a2974a2ff44e75e9159bc
Author:     Michael Tuexen <tuexen@FreeBSD.org>
AuthorDate: 2026-01-17 20:01:54 +0000
Commit:     Michael Tuexen <tuexen@FreeBSD.org>
CommitDate: 2026-01-17 20:01:54 +0000

    dwc: add transmit checksum offload for IPv6
    
    This patch adds support for transmit checksum offload for TCP/IPv6
    and UDP/IPv6.
    
    Reviewed by:            Timo Völker
    MFC after:              3 days
    Differential Revision:  https://reviews.freebsd.org/D54754
---
 sys/dev/dwc/dwc1000_dma.c |  2 +-
 sys/dev/dwc/if_dwc.c      | 10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/sys/dev/dwc/dwc1000_dma.c b/sys/dev/dwc/dwc1000_dma.c
index 8cc145216c2d..a2a6fbc84e58 100644
--- a/sys/dev/dwc/dwc1000_dma.c
+++ b/sys/dev/dwc/dwc1000_dma.c
@@ -276,7 +276,7 @@ dma1000_setup_txbuf(struct dwc_softc *sc, int idx, struct mbuf **mp)
 
 	m = *mp;
 
-	if ((m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) != 0)
+	if ((m->m_pkthdr.csum_flags & (CSUM_DELAY_DATA | CSUM_DELAY_DATA_IPV6)) != 0)
 		flags = sc->dma_ext_desc ? ETDESC0_CIC_SEG : NTDESC1_CIC_SEG;
 	else if ((m->m_pkthdr.csum_flags & CSUM_IP) != 0)
 		flags = sc->dma_ext_desc ? ETDESC0_CIC_HDR : NTDESC1_CIC_HDR;
diff --git a/sys/dev/dwc/if_dwc.c b/sys/dev/dwc/if_dwc.c
index 458ee01536ef..ac6e440cf95c 100644
--- a/sys/dev/dwc/if_dwc.c
+++ b/sys/dev/dwc/if_dwc.c
@@ -271,6 +271,12 @@ dwc_ioctl(if_t ifp, u_long cmd, caddr_t data)
 			if_sethwassistbits(ifp, CSUM_IP | CSUM_DELAY_DATA, 0);
 		else
 			if_sethwassistbits(ifp, 0, CSUM_IP | CSUM_DELAY_DATA);
+		if (mask & IFCAP_TXCSUM_IPV6)
+			if_togglecapenable(ifp, IFCAP_TXCSUM_IPV6);
+		if ((if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6) != 0)
+			if_sethwassistbits(ifp, CSUM_DELAY_DATA_IPV6, 0);
+		else
+			if_sethwassistbits(ifp, 0, CSUM_DELAY_DATA_IPV6);
 
 		if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
 			DWC_LOCK(sc);
@@ -607,8 +613,8 @@ dwc_attach(device_t dev)
 	if_setinitfn(ifp, dwc_init);
 	if_setsendqlen(ifp, TX_MAP_COUNT - 1);
 	if_setsendqready(sc->ifp);
-	if_sethwassist(sc->ifp, CSUM_IP | CSUM_DELAY_DATA);
-	if_setcapabilities(sc->ifp, IFCAP_VLAN_MTU | IFCAP_HWCSUM);
+	if_sethwassist(sc->ifp, CSUM_IP | CSUM_DELAY_DATA | CSUM_DELAY_DATA_IPV6);
+	if_setcapabilities(sc->ifp, IFCAP_VLAN_MTU | IFCAP_HWCSUM | IFCAP_TXCSUM_IPV6);
 	if_setcapenable(sc->ifp, if_getcapabilities(sc->ifp));
 
 	/* Attach the mii driver. */