[src/trunk]: src/sys/dev/pci ixl(4) supports IFCAP_CSUM_*_Rx

[yamaguchi <yamaguchi%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/1661774e3158
branches:  trunk
changeset: 466553:1661774e3158
user:      yamaguchi <yamaguchi%NetBSD.org@localhost>
date:      Thu Dec 26 03:17:01 2019 +0000

description:
ixl(4) supports IFCAP_CSUM_*_Rx

OKed by msaitoh@n.o.

diffstat:

 sys/dev/pci/if_ixl.c    |  63 +++++++++++++++++++++++++++++++++++++++++++++---
 sys/dev/pci/if_ixlvar.h |  18 +++++++++++++-
 2 files changed, 76 insertions(+), 5 deletions(-)

diffs (131 lines):

diff -r 4599800efdb7 -r 1661774e3158 sys/dev/pci/if_ixl.c
--- a/sys/dev/pci/if_ixl.c      Thu Dec 26 03:08:19 2019 +0000
+++ b/sys/dev/pci/if_ixl.c      Thu Dec 26 03:17:01 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_ixl.c,v 1.13 2019/12/26 03:08:19 yamaguchi Exp $    */
+/*     $NetBSD: if_ixl.c,v 1.14 2019/12/26 03:17:01 yamaguchi Exp $    */
 
 /*
  * Copyright (c) 2013-2015, Intel Corporation
@@ -592,6 +592,12 @@
 #define IXL_TX_INTR_PROCESS_LIMIT      256
 #define IXL_RX_INTR_PROCESS_LIMIT      0U
 
+#define IXL_IFCAP_RXCSUM       (IFCAP_CSUM_IPv4_Rx|    \
+                                IFCAP_CSUM_TCPv4_Rx|   \
+                                IFCAP_CSUM_UDPv4_Rx|   \
+                                IFCAP_CSUM_TCPv6_Rx|   \
+                                IFCAP_CSUM_UDPv6_Rx)
+
 #define delaymsec(_x)  DELAY(1000 * (_x))
 #ifdef IXL_DEBUG
 #define DDPRINTF(sc, fmt, args...)                     \
@@ -1195,10 +1201,9 @@
        ifp->if_stop = ixl_stop;
        IFQ_SET_MAXLEN(&ifp->if_snd, sc->sc_tx_ring_ndescs);
        IFQ_SET_READY(&ifp->if_snd);
+       ifp->if_capabilities |= IXL_IFCAP_RXCSUM;
 #if 0
-       ifp->if_capabilities |= IFCAP_CSUM_IPv4_Rx |
-           IFCAP_CSUM_TCPv4_Tx | IFCAP_CSUM_TCPv4_Rx |
-           IFCAP_CSUM_UDPv4_Tx | IFCAP_CSUM_UDPv4_Rx;
+       ifp->if_capabilities |= IFCAP_CSUM_TCPv4_Tx | IFCAP_CSUM_UDPv4_Tx;
 #endif
        ether_set_vlan_cb(&sc->sc_ec, ixl_vlan_cb);
        sc->sc_ec.ec_capabilities |= ETHERCAP_VLAN_MTU;
@@ -2838,6 +2843,53 @@
        kmem_free(rxr, sizeof(*rxr));
 }
 
+static inline void
+ixl_rx_csum(struct mbuf *m, uint64_t qword)
+{
+       int flags_mask;
+
+       if (!ISSET(qword, IXL_RX_DESC_L3L4P)) {
+               /* No L3 or L4 checksum was calculated */
+               return;
+       }
+
+       switch (__SHIFTOUT(qword, IXL_RX_DESC_PTYPE_MASK)) {
+       case IXL_RX_DESC_PTYPE_IPV4FRAG:
+       case IXL_RX_DESC_PTYPE_IPV4:
+       case IXL_RX_DESC_PTYPE_SCTPV4:
+       case IXL_RX_DESC_PTYPE_ICMPV4:
+               flags_mask = M_CSUM_IPv4 | M_CSUM_IPv4_BAD;
+               break;
+       case IXL_RX_DESC_PTYPE_TCPV4:
+               flags_mask = M_CSUM_IPv4 | M_CSUM_IPv4_BAD;
+               flags_mask |= M_CSUM_TCPv4 | M_CSUM_TCP_UDP_BAD;
+               break;
+       case IXL_RX_DESC_PTYPE_UDPV4:
+               flags_mask = M_CSUM_IPv4 | M_CSUM_IPv4_BAD;
+               flags_mask |= M_CSUM_UDPv4 | M_CSUM_TCP_UDP_BAD;
+               break;
+       case IXL_RX_DESC_PTYPE_TCPV6:
+               flags_mask = M_CSUM_TCPv6 | M_CSUM_TCP_UDP_BAD;
+               break;
+       case IXL_RX_DESC_PTYPE_UDPV6:
+               flags_mask = M_CSUM_UDPv6 | M_CSUM_TCP_UDP_BAD;
+               break;
+       default:
+               flags_mask = 0;
+       }
+
+       m->m_pkthdr.csum_flags |= (flags_mask & (M_CSUM_IPv4 |
+           M_CSUM_TCPv4 | M_CSUM_TCPv6 | M_CSUM_UDPv4 | M_CSUM_UDPv6));
+
+       if (ISSET(qword, IXL_RX_DESC_IPE)) {
+               m->m_pkthdr.csum_flags |= (flags_mask & M_CSUM_IPv4_BAD);
+       }
+
+       if (ISSET(qword, IXL_RX_DESC_L4E)) {
+               m->m_pkthdr.csum_flags |= (flags_mask & M_CSUM_TCP_UDP_BAD);
+       }
+}
+
 static int
 ixl_rxeof(struct ixl_softc *sc, struct ixl_rx_ring *rxr, u_int rxlimit)
 {
@@ -2914,6 +2966,9 @@
                                    __SHIFTOUT(word0, IXL_RX_DESC_L2TAG1_MASK));
                        }
 
+                       if ((ifp->if_capenable & IXL_IFCAP_RXCSUM) != 0)
+                               ixl_rx_csum(m, word);
+
                        if (!ISSET(word,
                            IXL_RX_DESC_RXE | IXL_RX_DESC_OVERSIZE)) {
                                m_set_rcvif(m, ifp);
diff -r 4599800efdb7 -r 1661774e3158 sys/dev/pci/if_ixlvar.h
--- a/sys/dev/pci/if_ixlvar.h   Thu Dec 26 03:08:19 2019 +0000
+++ b/sys/dev/pci/if_ixlvar.h   Thu Dec 26 03:17:01 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_ixlvar.h,v 1.2 2019/12/20 02:12:31 yamaguchi Exp $  */
+/*     $NetBSD: if_ixlvar.h,v 1.3 2019/12/26 03:17:01 yamaguchi Exp $  */
 
 /*
  * Copyright (c) 2019 Internet Initiative Japan, Inc.
@@ -788,6 +788,22 @@
 #define IXL_RX_DESC_HLEN_MASK          (0x7ffULL << IXL_RX_DESC_HLEN_SHIFT)
 } __packed __aligned(16);
 
+enum ixl_rx_desc_ptype {
+       IXL_RX_DESC_PTYPE_IPV4FRAG      = 22,
+       IXL_RX_DESC_PTYPE_IPV4          = 23,
+       IXL_RX_DESC_PTYPE_UDPV4         = 24,
+       IXL_RX_DESC_PTYPE_TCPV4         = 26,
+       IXL_RX_DESC_PTYPE_SCTPV4        = 27,
+       IXL_RX_DESC_PTYPE_ICMPV4        = 28,
+
+       IXL_RX_DESC_PTYPE_IPV6FRAG      = 88,
+       IXL_RX_DESC_PTYPE_IPV6          = 89,
+       IXL_RX_DESC_PTYPE_UDPV6         = 90,
+       IXL_RX_DESC_PTYPE_TCPV6         = 92,
+       IXL_RX_DESC_PTYPE_SCTPV6        = 93,
+       IXL_RX_DESC_PTYPE_ICMPV6        = 94,
+};
+
 struct ixl_rx_wb_desc_32 {
        uint64_t                qword0;
        uint64_t                qword1;