This removes a RX offload hack similar to the one just deleted from
sk(4). These chips can only add 16-bit words starting from some
offset, and so the driver gives them the likely start of the TCP/UDP
payload and then tries to compensate and... ugh.
Affected drivers:
* gem(4)
* hme(4)
* another hme(4) driver for sparc
I've successfully tested gem(4) on a Blade 100. I don't have any
hme(4) hardware.
ok?
Index: dev/ic/gem.c
===================================================================
RCS file: /cvs/src/sys/dev/ic/gem.c,v
retrieving revision 1.102
diff -u -p -r1.102 gem.c
--- dev/ic/gem.c 14 Mar 2014 11:04:24 -0000 1.102
+++ dev/ic/gem.c 19 Apr 2014 19:00:01 -0000
@@ -120,7 +120,6 @@ int gem_eint(struct gem_softc *, u_int)
int gem_rint(struct gem_softc *);
int gem_tint(struct gem_softc *, u_int32_t);
int gem_pint(struct gem_softc *);
-void gem_rxcksum(struct mbuf *, u_int64_t);
#ifdef GEM_DEBUG
#define DPRINTF(sc, x) if ((sc)->sc_arpcom.ac_if.if_flags & IFF_DEBUG)
\
@@ -811,9 +810,6 @@ gem_init(struct ifnet *ifp)
/* Encode Receive Descriptor ring size: four possible values */
v = gem_ringsize(GEM_NRXDESC /*XXX*/);
- /* RX TCP/UDP checksum offset */
- v |= ((ETHER_HDR_LEN + sizeof(struct ip)) <<
- GEM_RX_CONFIG_CXM_START_SHFT);
/* Enable DMA */
bus_space_write_4(t, h, GEM_RX_CONFIG,
v|(GEM_THRSH_1024<<GEM_RX_CONFIG_FIFO_THRS_SHIFT)|
@@ -948,95 +944,6 @@ gem_init_regs(struct gem_softc *sc)
}
/*
- * RX TCP/UDP checksum
- */
-void
-gem_rxcksum(struct mbuf *m, u_int64_t rxstat)
-{
- struct ether_header *eh;
- struct ip *ip;
- struct udphdr *uh;
- int32_t hlen, len, pktlen;
- u_int16_t cksum, *opts;
- u_int32_t temp32;
- union pseudoh {
- struct hdr {
- u_int16_t len;
- u_int8_t ttl;
- u_int8_t proto;
- u_int32_t src;
- u_int32_t dst;
- } h;
- u_int16_t w[6];
- } ph;
-
- pktlen = m->m_pkthdr.len;
- if (pktlen < sizeof(struct ether_header))
- return;
- eh = mtod(m, struct ether_header *);
- if (eh->ether_type != htons(ETHERTYPE_IP))
- return;
- ip = (struct ip *)(eh + 1);
- if (ip->ip_v != IPVERSION)
- return;
-
- hlen = ip->ip_hl << 2;
- pktlen -= sizeof(struct ether_header);
- if (hlen < sizeof(struct ip))
- return;
- if (ntohs(ip->ip_len) < hlen)
- return;
- if (ntohs(ip->ip_len) != pktlen)
- return;
- if (ip->ip_off & htons(IP_MF | IP_OFFMASK))
- return; /* can't handle fragmented packet */
-
- switch (ip->ip_p) {
- case IPPROTO_TCP:
- if (pktlen < (hlen + sizeof(struct tcphdr)))
- return;
- break;
- case IPPROTO_UDP:
- if (pktlen < (hlen + sizeof(struct udphdr)))
- return;
- uh = (struct udphdr *)((caddr_t)ip + hlen);
- if (uh->uh_sum == 0)
- return; /* no checksum */
- break;
- default:
- return;
- }
-
- cksum = htons(~(rxstat & GEM_RD_CHECKSUM));
- /* cksum fixup for IP options */
- len = hlen - sizeof(struct ip);
- if (len > 0) {
- opts = (u_int16_t *)(ip + 1);
- for (; len > 0; len -= sizeof(u_int16_t), opts++) {
- temp32 = cksum - *opts;
- temp32 = (temp32 >> 16) + (temp32 & 65535);
- cksum = temp32 & 65535;
- }
- }
-
- ph.h.len = htons(ntohs(ip->ip_len) - hlen);
- ph.h.ttl = 0;
- ph.h.proto = ip->ip_p;
- ph.h.src = ip->ip_src.s_addr;
- ph.h.dst = ip->ip_dst.s_addr;
- temp32 = cksum;
- opts = &ph.w[0];
- temp32 += opts[0] + opts[1] + opts[2] + opts[3] + opts[4] + opts[5];
- temp32 = (temp32 >> 16) + (temp32 & 65535);
- temp32 += (temp32 >> 16);
- cksum = ~temp32;
- if (cksum == 0) {
- m->m_pkthdr.csum_flags |=
- M_TCP_CSUM_IN_OK | M_UDP_CSUM_IN_OK;
- }
-}
-
-/*
* Receive interrupt.
*/
int
@@ -1100,8 +1007,6 @@ gem_rint(struct gem_softc *sc)
ifp->if_ipackets++;
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = m->m_len = len;
-
- gem_rxcksum(m, rxstat);
#if NBPFILTER > 0
if (ifp->if_bpf)
Index: dev/ic/hme.c
===================================================================
RCS file: /cvs/src/sys/dev/ic/hme.c,v
retrieving revision 1.63
diff -u -p -r1.63 hme.c
--- dev/ic/hme.c 7 Aug 2013 01:06:29 -0000 1.63
+++ dev/ic/hme.c 19 Apr 2014 19:12:29 -0000
@@ -105,8 +105,6 @@ void hme_mediastatus(struct ifnet *, st
int hme_eint(struct hme_softc *, u_int);
int hme_rint(struct hme_softc *);
int hme_tint(struct hme_softc *);
-/* TCP/UDP checksum offload support */
-void hme_rxcksum(struct mbuf *, u_int32_t);
void
hme_config(sc)
@@ -516,7 +514,7 @@ hme_init(sc)
bus_space_handle_t erx = sc->sc_erx;
bus_space_handle_t mac = sc->sc_mac;
u_int8_t *ea;
- u_int32_t v, n;
+ u_int32_t v;
/*
* Initialization sequence. The numbered steps below correspond
@@ -625,10 +623,6 @@ hme_init(sc)
#endif
/* Enable DMA */
v |= HME_ERX_CFG_DMAENABLE | (HME_RX_OFFSET << 3);
- /* RX TCP/UDP cksum offset */
- n = (ETHER_HDR_LEN + sizeof(struct ip)) / 2;
- n = (n << HME_ERX_CFG_CSUM_SHIFT) & HME_ERX_CFG_CSUMSTART;
- v |= n;
bus_space_write_4(t, erx, HME_ERXI_CFG, v);
/* step 11. XIF Configuration */
@@ -831,101 +825,6 @@ hme_tint(sc)
}
/*
- * XXX layering violation
- *
- * If we can have additional csum data member in 'struct pkthdr' for
- * these incomplete checksum offload capable hardware, things would be
- * much simpler. That member variable will carry partial checksum
- * data and it may be evaluated in TCP/UDP input handler after
- * computing pseudo header checksumming.
- */
-void
-hme_rxcksum(struct mbuf *m, u_int32_t flags)
-{
- struct ether_header *eh;
- struct ip *ip;
- struct udphdr *uh;
- int32_t hlen, len, pktlen;
- u_int16_t cksum, *opts;
- u_int32_t temp32;
- union pseudoh {
- struct hdr {
- u_int16_t len;
- u_int8_t ttl;
- u_int8_t proto;
- u_int32_t src;
- u_int32_t dst;
- } h;
- u_int16_t w[6];
- } ph;
-
- pktlen = m->m_pkthdr.len;
- if (pktlen < sizeof(struct ether_header))
- return;
- eh = mtod(m, struct ether_header *);
- if (eh->ether_type != htons(ETHERTYPE_IP))
- return;
- ip = (struct ip *)(eh + 1);
- if (ip->ip_v != IPVERSION)
- return;
-
- hlen = ip->ip_hl << 2;
- pktlen -= sizeof(struct ether_header);
- if (hlen < sizeof(struct ip))
- return;
- if (ntohs(ip->ip_len) < hlen)
- return;
- if (ntohs(ip->ip_len) != pktlen)
- return;
- if (ip->ip_off & htons(IP_MF | IP_OFFMASK))
- return; /* can't handle fragmented packet */
-
- switch (ip->ip_p) {
- case IPPROTO_TCP:
- if (pktlen < (hlen + sizeof(struct tcphdr)))
- return;
- break;
- case IPPROTO_UDP:
- if (pktlen < (hlen + sizeof(struct udphdr)))
- return;
- uh = (struct udphdr *)((caddr_t)ip + hlen);
- if (uh->uh_sum == 0)
- return; /* no checksum */
- break;
- default:
- return;
- }
-
- cksum = htons(~(flags & HME_XD_RXCKSUM));
- /* cksum fixup for IP options */
- len = hlen - sizeof(struct ip);
- if (len > 0) {
- opts = (u_int16_t *)(ip + 1);
- for (; len > 0; len -= sizeof(u_int16_t), opts++) {
- temp32 = cksum - *opts;
- temp32 = (temp32 >> 16) + (temp32 & 65535);
- cksum = temp32 & 65535;
- }
- }
- /* cksum fixup for pseudo-header, replace with in_cksum_phdr()? */
- ph.h.len = htons(ntohs(ip->ip_len) - hlen);
- ph.h.ttl = 0;
- ph.h.proto = ip->ip_p;
- ph.h.src = ip->ip_src.s_addr;
- ph.h.dst = ip->ip_dst.s_addr;
- temp32 = cksum;
- opts = &ph.w[0];
- temp32 += opts[0] + opts[1] + opts[2] + opts[3] + opts[4] + opts[5];
- temp32 = (temp32 >> 16) + (temp32 & 65535);
- temp32 += (temp32 >> 16);
- cksum = ~temp32;
- if (cksum == 0) {
- m->m_pkthdr.csum_flags |=
- M_TCP_CSUM_IN_OK | M_UDP_CSUM_IN_OK;
- }
-}
-
-/*
* Receive interrupt.
*/
int
@@ -975,7 +874,6 @@ hme_rint(sc)
m->m_pkthdr.len = m->m_len = len;
ifp->if_ipackets++;
- hme_rxcksum(m, flags);
#if NBPFILTER > 0
if (ifp->if_bpf)
Index: arch/sparc/dev/hme.c
===================================================================
RCS file: /cvs/src/sys/arch/sparc/dev/hme.c,v
retrieving revision 1.64
diff -u -p -r1.64 hme.c
--- arch/sparc/dev/hme.c 5 Sep 2013 20:55:58 -0000 1.64
+++ arch/sparc/dev/hme.c 19 Apr 2014 19:15:08 -0000
@@ -103,9 +103,6 @@ int hme_tint(struct hme_softc *);
int hme_mint(struct hme_softc *, u_int32_t);
int hme_eint(struct hme_softc *, u_int32_t);
-/* TCP/UDP checksum offload support */
-void hme_rxcksum(struct mbuf *, u_int32_t);
-
void hme_reset_rx(struct hme_softc *);
void hme_reset_tx(struct hme_softc *);
@@ -494,7 +491,7 @@ void
hmeinit(sc)
struct hme_softc *sc;
{
- u_int32_t c, n;
+ u_int32_t c;
struct ifnet *ifp = &sc->sc_arpcom.ac_if;
struct hme_tcvr *tcvr = sc->sc_tcvr;
struct hme_cr *cr = sc->sc_cr;
@@ -553,10 +550,6 @@ hmeinit(sc)
txr->cfg |= TXR_CFG_DMAENABLE;
c = RXR_CFG_DMAENABLE | (HME_RX_OFFSET << 3);
- /* RX TCP/UDP cksum offset */
- n = (ETHER_HDR_LEN + sizeof(struct ip)) / 2;
- n = (n << RXR_CFG_CSUM_SHIFT) & RXR_CFG_CSUMSTART;
- c |= n;
#if HME_RX_RING_SIZE == 32
c |= RXR_CFG_RINGSIZE32;
#elif HME_RX_RING_SIZE == 64
@@ -709,101 +702,6 @@ hme_tint(sc)
return (1);
}
-/*
- * XXX layering violation
- *
- * If we can have additional csum data member in 'struct pkthdr' for
- * these incomplete checksum offload capable hardware, things would be
- * much simpler. That member variable will carry partial checksum
- * data and it may be evaluated in TCP/UDP input handler after
- * computing pseudo header checksumming.
- */
-void
-hme_rxcksum(struct mbuf *m, u_int32_t flags)
-{
- struct ether_header *eh;
- struct ip *ip;
- struct udphdr *uh;
- int32_t hlen, len, pktlen;
- u_int16_t cksum, *opts;
- u_int32_t temp32;
- union pseudoh {
- struct hdr {
- u_int16_t len;
- u_int8_t ttl;
- u_int8_t proto;
- u_int32_t src;
- u_int32_t dst;
- } h;
- u_int16_t w[6];
- } ph;
-
- pktlen = m->m_pkthdr.len;
- if (pktlen < sizeof(struct ether_header))
- return;
- eh = mtod(m, struct ether_header *);
- if (eh->ether_type != htons(ETHERTYPE_IP))
- return;
- ip = (struct ip *)(eh + 1);
- if (ip->ip_v != IPVERSION)
- return;
-
- hlen = ip->ip_hl << 2;
- pktlen -= sizeof(struct ether_header);
- if (hlen < sizeof(struct ip))
- return;
- if (ntohs(ip->ip_len) < hlen)
- return;
- if (ntohs(ip->ip_len) != pktlen)
- return;
- if (ip->ip_off & htons(IP_MF | IP_OFFMASK))
- return; /* can't handle fragmented packet */
-
- switch (ip->ip_p) {
- case IPPROTO_TCP:
- if (pktlen < (hlen + sizeof(struct tcphdr)))
- return;
- break;
- case IPPROTO_UDP:
- if (pktlen < (hlen + sizeof(struct udphdr)))
- return;
- uh = (struct udphdr *)((caddr_t)ip + hlen);
- if (uh->uh_sum == 0)
- return; /* no checksum */
- break;
- default:
- return;
- }
-
- cksum = htons(~(flags & HME_RXD_CSUM));
- /* cksum fixup for IP options */
- len = hlen - sizeof(struct ip);
- if (len > 0) {
- opts = (u_int16_t *)(ip + 1);
- for (; len > 0; len -= sizeof(u_int16_t), opts++) {
- temp32 = cksum - *opts;
- temp32 = (temp32 >> 16) + (temp32 & 65535);
- cksum = temp32 & 65535;
- }
- }
- /* cksum fixup for pseudo-header, replace with in_cksum_phdr()? */
- ph.h.len = htons(ntohs(ip->ip_len) - hlen);
- ph.h.ttl = 0;
- ph.h.proto = ip->ip_p;
- ph.h.src = ip->ip_src.s_addr;
- ph.h.dst = ip->ip_dst.s_addr;
- temp32 = cksum;
- opts = &ph.w[0];
- temp32 += opts[0] + opts[1] + opts[2] + opts[3] + opts[4] + opts[5];
- temp32 = (temp32 >> 16) + (temp32 & 65535);
- temp32 += (temp32 >> 16);
- cksum = ~temp32;
- if (cksum == 0) {
- m->m_pkthdr.csum_flags |=
- M_TCP_CSUM_IN_OK | M_UDP_CSUM_IN_OK;
- }
-}
-
int
hme_rint(sc)
struct hme_softc *sc;
@@ -944,7 +842,6 @@ hme_read(sc, idx, len, flags)
}
ifp->if_ipackets++;
- hme_rxcksum(m, flags);
#if NBPFILTER > 0
/*
--
Christian "naddy" Weisgerber na...@mips.inka.de
