Author: sephe Date: Thu Oct 27 05:04:54 2016 New Revision: 307988 URL: https://svnweb.freebsd.org/changeset/base/307988
Log: hyperv/hn: Shuffle chimney sending buffer alloc/free around. This paves way for more chimney sending buffer reorganization. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8343 Modified: head/sys/dev/hyperv/netvsc/hv_net_vsc.c head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c head/sys/dev/hyperv/netvsc/if_hnvar.h Modified: head/sys/dev/hyperv/netvsc/hv_net_vsc.c ============================================================================== --- head/sys/dev/hyperv/netvsc/hv_net_vsc.c Thu Oct 27 04:55:19 2016 (r307987) +++ head/sys/dev/hyperv/netvsc/hv_net_vsc.c Thu Oct 27 05:04:54 2016 (r307988) @@ -73,33 +73,6 @@ static const uint32_t hn_nvs_version[] HN_NVS_VERSION_1 }; -uint32_t -hn_chim_alloc(struct hn_softc *sc) -{ - int i, bmap_cnt = sc->hn_chim_bmap_cnt; - u_long *bmap = sc->hn_chim_bmap; - uint32_t ret = HN_NVS_CHIM_IDX_INVALID; - - for (i = 0; i < bmap_cnt; ++i) { - int idx; - - idx = ffsl(~bmap[i]); - if (idx == 0) - continue; - - --idx; /* ffsl is 1-based */ - KASSERT(i * LONG_BIT + idx < sc->hn_chim_cnt, - ("invalid i %d and idx %d", i, idx)); - - if (atomic_testandset_long(&bmap[i], idx)) - continue; - - ret = i * LONG_BIT + idx; - break; - } - return (ret); -} - static const void * hn_nvs_xact_execute(struct hn_softc *sc, struct vmbus_xact *xact, void *req, int reqlen, size_t *resplen0, uint32_t type) @@ -648,25 +621,6 @@ hn_nvs_sent_none(struct hn_send_ctx *snd /* EMPTY */ } -void -hn_chim_free(struct hn_softc *sc, uint32_t chim_idx) -{ - u_long mask; - uint32_t idx; - - idx = chim_idx / LONG_BIT; - KASSERT(idx < sc->hn_chim_bmap_cnt, - ("invalid chimney index 0x%x", chim_idx)); - - mask = 1UL << (chim_idx % LONG_BIT); - KASSERT(sc->hn_chim_bmap[idx] & mask, - ("index bitmap 0x%lx, chimney index %u, " - "bitmap idx %d, bitmask 0x%lx", - sc->hn_chim_bmap[idx], chim_idx, idx, mask)); - - atomic_clear_long(&sc->hn_chim_bmap[idx], mask); -} - int hn_nvs_alloc_subchans(struct hn_softc *sc, int *nsubch0) { Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c ============================================================================== --- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Thu Oct 27 04:55:19 2016 (r307987) +++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Thu Oct 27 05:04:54 2016 (r307988) @@ -61,6 +61,7 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/sockio.h> +#include <sys/limits.h> #include <sys/mbuf.h> #include <sys/malloc.h> #include <sys/module.h> @@ -457,6 +458,52 @@ hn_sendpkt_rndis_chim(struct hn_tx_ring &rndis, sizeof(rndis), &txd->send_ctx)); } +static __inline uint32_t +hn_chim_alloc(struct hn_softc *sc) +{ + int i, bmap_cnt = sc->hn_chim_bmap_cnt; + u_long *bmap = sc->hn_chim_bmap; + uint32_t ret = HN_NVS_CHIM_IDX_INVALID; + + for (i = 0; i < bmap_cnt; ++i) { + int idx; + + idx = ffsl(~bmap[i]); + if (idx == 0) + continue; + + --idx; /* ffsl is 1-based */ + KASSERT(i * LONG_BIT + idx < sc->hn_chim_cnt, + ("invalid i %d and idx %d", i, idx)); + + if (atomic_testandset_long(&bmap[i], idx)) + continue; + + ret = i * LONG_BIT + idx; + break; + } + return (ret); +} + +static __inline void +hn_chim_free(struct hn_softc *sc, uint32_t chim_idx) +{ + u_long mask; + uint32_t idx; + + idx = chim_idx / LONG_BIT; + KASSERT(idx < sc->hn_chim_bmap_cnt, + ("invalid chimney index 0x%x", chim_idx)); + + mask = 1UL << (chim_idx % LONG_BIT); + KASSERT(sc->hn_chim_bmap[idx] & mask, + ("index bitmap 0x%lx, chimney index %u, " + "bitmap idx %d, bitmask 0x%lx", + sc->hn_chim_bmap[idx], chim_idx, idx, mask)); + + atomic_clear_long(&sc->hn_chim_bmap[idx], mask); +} + static int hn_set_rxfilter(struct hn_softc *sc) { Modified: head/sys/dev/hyperv/netvsc/if_hnvar.h ============================================================================== --- head/sys/dev/hyperv/netvsc/if_hnvar.h Thu Oct 27 04:55:19 2016 (r307987) +++ head/sys/dev/hyperv/netvsc/if_hnvar.h Thu Oct 27 05:04:54 2016 (r307988) @@ -94,9 +94,6 @@ hn_nvs_send_sglist(struct vmbus_channel struct vmbus_xact; struct rndis_packet_msg; -uint32_t hn_chim_alloc(struct hn_softc *sc); -void hn_chim_free(struct hn_softc *sc, uint32_t chim_idx); - int hn_rndis_attach(struct hn_softc *sc, int mtu); void hn_rndis_detach(struct hn_softc *sc); int hn_rndis_conf_rss(struct hn_softc *sc, uint16_t flags); _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
