[src/trunk]: src/sys/dev/pci Add SIOCSIFMTU support for ixl(4)

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

details:   https://anonhg.NetBSD.org/src/rev/55d8fab0c95a
branches:  trunk
changeset: 1006895:55d8fab0c95a
user:      yamaguchi <yamaguchi%NetBSD.org@localhost>
date:      Thu Jan 30 09:53:49 2020 +0000

description:
Add SIOCSIFMTU support for ixl(4)

diffstat:

 sys/dev/pci/if_ixl.c |  48 ++++++++++++++++++++++++++++++++++++++----------
 1 files changed, 38 insertions(+), 10 deletions(-)

diffs (122 lines):

diff -r 3776ee2574bd -r 55d8fab0c95a sys/dev/pci/if_ixl.c
--- a/sys/dev/pci/if_ixl.c      Thu Jan 30 07:58:33 2020 +0000
+++ b/sys/dev/pci/if_ixl.c      Thu Jan 30 09:53:49 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_ixl.c,v 1.28 2020/01/27 09:40:43 yamaguchi Exp $    */
+/*     $NetBSD: if_ixl.c,v 1.29 2020/01/30 09:53:49 yamaguchi Exp $    */
 
 /*
  * Copyright (c) 2013-2015, Intel Corporation
@@ -175,10 +175,20 @@
        I40E_PFINT_ICR0_PE_CRITERR_MASK)
 
 #define IXL_TX_PKT_DESCS               8
+#define IXL_TX_PKT_MAXSIZE             (MCLBYTES * IXL_TX_PKT_DESCS)
 #define IXL_TX_QUEUE_ALIGN             128
 #define IXL_RX_QUEUE_ALIGN             128
 
-#define IXL_HARDMTU                    9712 /* 9726 - ETHER_HDR_LEN */
+#define IXL_MCLBYTES                   (MCLBYTES - ETHER_ALIGN)
+#define IXL_MTU_ETHERLEN               ETHER_HDR_LEN           \
+                                       + ETHER_CRC_LEN
+#if 0
+#define IXL_MAX_MTU                    (9728 - IXL_MTU_ETHERLEN)
+#else
+/* (dbuff * 5) - ETHER_HDR_LEN - ETHER_CRC_LEN */
+#define IXL_MAX_MTU                    (9600 - IXL_MTU_ETHERLEN)
+#endif
+#define IXL_MIN_MTU                    (ETHER_MIN_LEN - ETHER_CRC_LEN)
 
 #define IXL_PCIREG                     PCI_MAPREG_START
 
@@ -1356,7 +1366,7 @@
        ifp->if_capabilities |= IFCAP_TSOv4 | IFCAP_TSOv6;
 #endif
        ether_set_vlan_cb(&sc->sc_ec, ixl_vlan_cb);
-       sc->sc_ec.ec_capabilities |= ETHERCAP_VLAN_MTU;
+       sc->sc_ec.ec_capabilities |= ETHERCAP_JUMBO_MTU;
        sc->sc_ec.ec_capabilities |= ETHERCAP_VLAN_HWTAGGING;
        sc->sc_ec.ec_capabilities |= ETHERCAP_VLAN_HWFILTER;
 
@@ -1758,9 +1768,24 @@
        const struct sockaddr *sa;
        uint8_t addrhi[ETHER_ADDR_LEN], addrlo[ETHER_ADDR_LEN];
        int s, error = 0;
-       unsigned int i;
+       unsigned int i, nmtu;
 
        switch (cmd) {
+       case SIOCSIFMTU:
+               nmtu = ifr->ifr_mtu;
+
+               if (nmtu < IXL_MIN_MTU || nmtu > IXL_MAX_MTU) {
+                       error = EINVAL;
+                       break;
+               }
+               if (ifp->if_mtu != nmtu) {
+                       s = splnet();
+                       error = ether_ioctl(ifp, cmd, data);
+                       splx(s);
+                       if (error == ENETRESET)
+                               error = ixl_init(ifp);
+               }
+               break;
        case SIOCADDMULTI:
                sa = ifreq_getaddr(SIOCADDMULTI, ifr);
                if (ether_addmulti(sa, &sc->sc_ec) == ENETRESET) {
@@ -2342,8 +2367,8 @@
        for (i = 0; i < sc->sc_tx_ring_ndescs; i++) {
                txm = &maps[i];
 
-               if (bus_dmamap_create(sc->sc_dmat,
-                   IXL_HARDMTU, IXL_TX_PKT_DESCS, IXL_HARDMTU, 0,
+               if (bus_dmamap_create(sc->sc_dmat, IXL_TX_PKT_MAXSIZE,
+                   IXL_TX_PKT_DESCS, IXL_TX_PKT_MAXSIZE, 0,
                    BUS_DMA_WAITOK | BUS_DMA_ALLOCNOW, &txm->txm_map) != 0)
                        goto uncreate;
 
@@ -2908,7 +2933,7 @@
                rxm = &maps[i];
 
                if (bus_dmamap_create(sc->sc_dmat,
-                   IXL_HARDMTU, 1, IXL_HARDMTU, 0,
+                   IXL_MCLBYTES, 1, IXL_MCLBYTES, 0,
                    BUS_DMA_WAITOK | BUS_DMA_ALLOCNOW, &rxm->rxm_map) != 0)
                        goto uncreate;
 
@@ -3016,21 +3041,24 @@
 ixl_rxr_config(struct ixl_softc *sc, struct ixl_rx_ring *rxr)
 {
        struct ixl_hmc_rxq rxq;
+       struct ifnet *ifp = &sc->sc_ec.ec_if;
+       uint16_t rxmax;
        void *hmc;
 
        memset(&rxq, 0, sizeof(rxq));
+       rxmax = ifp->if_mtu + IXL_MTU_ETHERLEN;
 
        rxq.head = htole16(rxr->rxr_cons);
        rxq.base = htole64(IXL_DMA_DVA(&rxr->rxr_mem) / IXL_HMC_RXQ_BASE_UNIT);
        rxq.qlen = htole16(sc->sc_rx_ring_ndescs);
-       rxq.dbuff = htole16(MCLBYTES / IXL_HMC_RXQ_DBUFF_UNIT);
+       rxq.dbuff = htole16(IXL_MCLBYTES / IXL_HMC_RXQ_DBUFF_UNIT);
        rxq.hbuff = 0;
        rxq.dtype = IXL_HMC_RXQ_DTYPE_NOSPLIT;
        rxq.dsize = IXL_HMC_RXQ_DSIZE_32;
        rxq.crcstrip = 1;
        rxq.l2sel = 1;
        rxq.showiv = 1;
-       rxq.rxmax = htole16(IXL_HARDMTU);
+       rxq.rxmax = htole16(rxmax);
        rxq.tphrdesc_ena = 0;
        rxq.tphwdesc_ena = 0;
        rxq.tphdata_ena = 0;
@@ -3274,7 +3302,7 @@
                        break;
                }
 
-               m->m_len = m->m_pkthdr.len = MCLBYTES + ETHER_ALIGN;
+               m->m_len = m->m_pkthdr.len = MCLBYTES;
                m_adj(m, ETHER_ALIGN);
 
                map = rxm->rxm_map;