Date: Tue, 5 Apr 2011 17:41:54 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r220368 - head/sys/dev/bge Message-ID: <201104051741.p35HfsKf025656@svn.freebsd.org>
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Author: yongari Date: Tue Apr 5 17:41:54 2011 New Revision: 220368 URL: http://svn.freebsd.org/changeset/base/220368 Log: Add initial jumbo frame support for BCM5714/BCM5715 and BCM5780. Unlike other controllers which have more advanced jumbo support, these controllers have one send ring, one standard receive producer ring and one receive return ring. In order to receive jumbo frames on the controllers, driver now will increase Rx buffer size to 9k. Two Rx modes are supported on these controllers and I chose standard Rx BDs over extended Rx BDs. The extended Rx BD mode allows up to 4 segmentations for each Rx BDs such that kernel does not have to allocate large buffer of contiguous memory for receiving. The extended Rx BD mode is already used on controllers that have separate jumbo receive ring. However, using extended Rx BDs on BCM5714/BCM5715/BCM5780 reduces the number of Rx BDs to 256 entries which in turn may reduce the performance. Also UMA backed page allocator for jumbo frame returns contiguous memory so using extended Rx BD has no advantage on FreeBSD unless highly customized local allocator implemented in driver is used. To use jumbo buffers in standard receive ring, Rx buffer allocation handler was changed to allocate MJUM9BYTES sized mbuf. PR: kern/155192 Tested by: Vijay Singh <vijju.singh <> gmail dot com> Submitted by: mjacob (initial version) Modified: head/sys/dev/bge/if_bge.c head/sys/dev/bge/if_bgereg.h Modified: head/sys/dev/bge/if_bge.c ============================================================================== --- head/sys/dev/bge/if_bge.c Tue Apr 5 16:14:54 2011 (r220367) +++ head/sys/dev/bge/if_bge.c Tue Apr 5 17:41:54 2011 (r220368) @@ -943,10 +943,19 @@ bge_newbuf_std(struct bge_softc *sc, int bus_dmamap_t map; int error, nsegs; - m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); - if (m == NULL) - return (ENOBUFS); - m->m_len = m->m_pkthdr.len = MCLBYTES; + if (sc->bge_flags & BGE_FLAG_JUMBO_STD && + (sc->bge_ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + + ETHER_VLAN_ENCAP_LEN > (MCLBYTES - ETHER_ALIGN))) { + m = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, MJUM9BYTES); + if (m == NULL) + return (ENOBUFS); + m->m_len = m->m_pkthdr.len = MJUM9BYTES; + } else { + m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); + if (m == NULL) + return (ENOBUFS); + m->m_len = m->m_pkthdr.len = MCLBYTES; + } if ((sc->bge_flags & BGE_FLAG_RX_ALIGNBUG) == 0) m_adj(m, ETHER_ALIGN); @@ -2385,7 +2394,7 @@ static int bge_dma_alloc(struct bge_softc *sc) { bus_addr_t lowaddr; - bus_size_t boundary, sbsz, txsegsz, txmaxsegsz; + bus_size_t boundary, sbsz, rxmaxsegsz, txsegsz, txmaxsegsz; int i, error; lowaddr = BUS_SPACE_MAXADDR; @@ -2513,9 +2522,13 @@ bge_dma_alloc(struct bge_softc *sc) } /* Create tag for Rx mbufs. */ + if (sc->bge_flags & BGE_FLAG_JUMBO_STD) + rxmaxsegsz = MJUM9BYTES; + else + rxmaxsegsz = MCLBYTES; error = bus_dma_tag_create(sc->bge_cdata.bge_buffer_tag, 1, 0, - BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, - MCLBYTES, 0, NULL, NULL, &sc->bge_cdata.bge_rx_mtag); + BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, rxmaxsegsz, 1, + rxmaxsegsz, 0, NULL, NULL, &sc->bge_cdata.bge_rx_mtag); if (error) { device_printf(sc->bge_dev, "could not allocate RX dma tag\n"); @@ -2759,7 +2772,7 @@ bge_attach(device_t dev) case BGE_ASICREV_BCM5714_A0: case BGE_ASICREV_BCM5780: case BGE_ASICREV_BCM5714: - sc->bge_flags |= BGE_FLAG_5714_FAMILY /* | BGE_FLAG_JUMBO */; + sc->bge_flags |= BGE_FLAG_5714_FAMILY | BGE_FLAG_JUMBO_STD; /* FALLTHROUGH */ case BGE_ASICREV_BCM5750: case BGE_ASICREV_BCM5752: @@ -3560,7 +3573,8 @@ bge_rxeof(struct bge_softc *sc, uint16_t sc->bge_cdata.bge_rx_return_ring_map, BUS_DMASYNC_POSTREAD); bus_dmamap_sync(sc->bge_cdata.bge_rx_std_ring_tag, sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_POSTWRITE); - if (ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ETHER_VLAN_ENCAP_LEN > + if (BGE_IS_JUMBO_CAPABLE(sc) && + ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ETHER_VLAN_ENCAP_LEN > (MCLBYTES - ETHER_ALIGN)) bus_dmamap_sync(sc->bge_cdata.bge_rx_jumbo_ring_tag, sc->bge_cdata.bge_rx_jumbo_ring_map, BUS_DMASYNC_POSTWRITE); @@ -4689,7 +4703,8 @@ bge_init_locked(struct bge_softc *sc) } /* Init jumbo RX ring. */ - if (ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ETHER_VLAN_ENCAP_LEN > + if (BGE_IS_JUMBO_CAPABLE(sc) && + ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ETHER_VLAN_ENCAP_LEN > (MCLBYTES - ETHER_ALIGN)) { if (bge_init_rx_ring_jumbo(sc) != 0) { device_printf(sc->bge_dev, @@ -4914,14 +4929,19 @@ bge_ioctl(struct ifnet *ifp, u_long comm switch (command) { case SIOCSIFMTU: + if (BGE_IS_JUMBO_CAPABLE(sc) || + (sc->bge_flags & BGE_FLAG_JUMBO_STD)) { + if (ifr->ifr_mtu < ETHERMIN || + ifr->ifr_mtu > BGE_JUMBO_MTU) { + error = EINVAL; + break; + } + } else if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > ETHERMTU) { + error = EINVAL; + break; + } BGE_LOCK(sc); - if (ifr->ifr_mtu < ETHERMIN || - ((BGE_IS_JUMBO_CAPABLE(sc)) && - ifr->ifr_mtu > BGE_JUMBO_MTU) || - ((!BGE_IS_JUMBO_CAPABLE(sc)) && - ifr->ifr_mtu > ETHERMTU)) - error = EINVAL; - else if (ifp->if_mtu != ifr->ifr_mtu) { + if (ifp->if_mtu != ifr->ifr_mtu) { ifp->if_mtu = ifr->ifr_mtu; if (ifp->if_drv_flags & IFF_DRV_RUNNING) { ifp->if_drv_flags &= ~IFF_DRV_RUNNING; Modified: head/sys/dev/bge/if_bgereg.h ============================================================================== --- head/sys/dev/bge/if_bgereg.h Tue Apr 5 16:14:54 2011 (r220367) +++ head/sys/dev/bge/if_bgereg.h Tue Apr 5 17:41:54 2011 (r220368) @@ -2748,6 +2748,7 @@ struct bge_softc { uint32_t bge_flags; #define BGE_FLAG_TBI 0x00000001 #define BGE_FLAG_JUMBO 0x00000002 +#define BGE_FLAG_JUMBO_STD 0x00000004 #define BGE_FLAG_EADDR 0x00000008 #define BGE_FLAG_MII_SERDES 0x00000010 #define BGE_FLAG_CPMU_PRESENT 0x00000020
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