diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/pci/if_nxe.c | 97 |
1 files changed, 96 insertions, 1 deletions
diff --git a/sys/dev/pci/if_nxe.c b/sys/dev/pci/if_nxe.c index aa2798aa0a3..8cb66315221 100644 --- a/sys/dev/pci/if_nxe.c +++ b/sys/dev/pci/if_nxe.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_nxe.c,v 1.25 2007/08/15 03:18:44 dlg Exp $ */ +/* $OpenBSD: if_nxe.c,v 1.26 2007/08/15 03:52:50 dlg Exp $ */ /* * Copyright (c) 2007 David Gwynne <dlg@openbsd.org> @@ -547,6 +547,19 @@ struct nxe_dmamem { #define NXE_DMA_DVA(_ndm) ((_ndm)->ndm_map->dm_segs[0].ds_addr) #define NXE_DMA_KVA(_ndm) ((void *)(_ndm)->ndm_kva) +struct nxe_pkt { + u_int16_t pkt_id; + bus_dmamap_t pkt_dmap; + struct mbuf *pkt_m; + TAILQ_ENTRY(nxe_pkt) pkt_link; +}; + +struct nxe_pkt_list { + struct nxe_pkt *npl_pkts; + TAILQ_HEAD(, nxe_pkt) npl_free; + TAILQ_HEAD(, nxe_pkt) npl_used; +}; + /* * autoconf glue */ @@ -626,6 +639,15 @@ void nxe_watchdog(struct ifnet *); int nxe_media_change(struct ifnet *); void nxe_media_status(struct ifnet *, struct ifmediareq *); +/* pkts */ +struct nxe_pkt_list *nxe_pkt_alloc(struct nxe_softc *, u_int, int); +void nxe_pkt_free(struct nxe_softc *, + struct nxe_pkt_list *); +void nxe_pkt_put(struct nxe_pkt_list *, struct nxe_pkt *); +struct nxe_pkt *nxe_pkt_get(struct nxe_pkt_list *); +struct nxe_pkt *nxe_pkt_used(struct nxe_pkt_list *); + + /* wrapper around dmaable memory allocations */ struct nxe_dmamem *nxe_dmamem_alloc(struct nxe_softc *, bus_size_t, bus_size_t); @@ -1113,6 +1135,79 @@ nxe_tick(void *xsc) timeout_add(&sc->sc_tick, hz * 5); } +struct nxe_pkt_list * +nxe_pkt_alloc(struct nxe_softc *sc, u_int npkts, int nsegs) +{ + struct nxe_pkt_list *npl; + struct nxe_pkt *pkt; + int i; + + npl = malloc(sizeof(struct nxe_pkt_list), M_DEVBUF, M_WAITOK); + bzero(npl, sizeof(struct nxe_pkt_list)); + + pkt = malloc(sizeof(struct nxe_pkt) * npkts, M_DEVBUF, M_WAITOK); + bzero(pkt, sizeof(struct nxe_pkt) * npkts); + + npl->npl_pkts = pkt; + TAILQ_INIT(&npl->npl_free); + TAILQ_INIT(&npl->npl_used); + for (i = 0; i < npkts; i++) { + pkt = &npl->npl_pkts[i]; + + pkt->pkt_id = i; + if (bus_dmamap_create(sc->sc_dmat, NXE_MAX_PKTLEN, nsegs, + NXE_MAX_PKTLEN, 0, BUS_DMA_WAITOK | BUS_DMA_ALLOCNOW, + &pkt->pkt_dmap) != 0) { + nxe_pkt_free(sc, npl); + return (NULL); + } + + TAILQ_INSERT_TAIL(&npl->npl_free, pkt, pkt_link); + } + + return (npl); +} + +void +nxe_pkt_free(struct nxe_softc *sc, struct nxe_pkt_list *npl) +{ + struct nxe_pkt *pkt; + + while ((pkt = nxe_pkt_get(npl)) != NULL) + bus_dmamap_destroy(sc->sc_dmat, pkt->pkt_dmap); + + free(npl->npl_pkts, M_DEVBUF); + free(npl, M_DEVBUF); +} + +struct nxe_pkt * +nxe_pkt_get(struct nxe_pkt_list *npl) +{ + struct nxe_pkt *pkt; + + pkt = TAILQ_FIRST(&npl->npl_free); + if (pkt != NULL) { + TAILQ_REMOVE(&npl->npl_free, pkt, pkt_link); + TAILQ_INSERT_TAIL(&npl->npl_used, pkt, pkt_link); + } + + return (pkt); +} + +void +nxe_pkt_put(struct nxe_pkt_list *npl, struct nxe_pkt *pkt) +{ + TAILQ_REMOVE(&npl->npl_used, pkt, pkt_link); + TAILQ_INSERT_TAIL(&npl->npl_free, pkt, pkt_link); + +} + +struct nxe_pkt * +nxe_pkt_used(struct nxe_pkt_list *npl) +{ + return (TAILQ_FIRST(&npl->npl_used)); +} + struct nxe_dmamem * nxe_dmamem_alloc(struct nxe_softc *sc, bus_size_t size, bus_size_t align) { |