Date: Wed, 21 Oct 2009 11:50:18 +0000 (UTC) From: Stanislav Sedov <stas@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r198318 - head/sys/dev/bge Message-ID: <200910211150.n9LBoI05098322@svn.freebsd.org>
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Author: stas Date: Wed Oct 21 11:50:18 2009 New Revision: 198318 URL: http://svn.freebsd.org/changeset/base/198318 Log: - On entrance to the rx_eof sync RX rings maps with POSTWRITE flag instead of POSTREAD: the hardware do not touch this memory (CPU updates it). It is already synchronized as PREWRITE after the processing is done. - Synchronize RX return ring memory in rx_eof. This is needed as the deviced updates this memory when receives packets. - Decouple the synchronization of BGE status block in the interrupt service routine: perfrom PREREAD synchronization only all accesses to this block are finished. This seems to be more natural. Reviewed by: yongari, marius MFC after: 2 weeks Modified: head/sys/dev/bge/if_bge.c Modified: head/sys/dev/bge/if_bge.c ============================================================================== --- head/sys/dev/bge/if_bge.c Wed Oct 21 11:10:34 2009 (r198317) +++ head/sys/dev/bge/if_bge.c Wed Oct 21 11:50:18 2009 (r198318) @@ -3122,10 +3122,10 @@ bge_rxeof(struct bge_softc *sc) bus_dmamap_sync(sc->bge_cdata.bge_rx_return_ring_tag, 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_POSTREAD); + sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_POSTWRITE); if (BGE_IS_JUMBO_CAPABLE(sc)) bus_dmamap_sync(sc->bge_cdata.bge_rx_jumbo_ring_tag, - sc->bge_cdata.bge_rx_jumbo_ring_map, BUS_DMASYNC_POSTREAD); + sc->bge_cdata.bge_rx_jumbo_ring_map, BUS_DMASYNC_POSTWRITE); while (rx_cons != rx_prod) { struct bge_rx_bd *cur_rx; @@ -3251,6 +3251,8 @@ bge_rxeof(struct bge_softc *sc) return (rx_npkts); } + bus_dmamap_sync(sc->bge_cdata.bge_rx_return_ring_tag, + sc->bge_cdata.bge_rx_return_ring_map, BUS_DMASYNC_PREREAD); if (stdcnt > 0) bus_dmamap_sync(sc->bge_cdata.bge_rx_std_ring_tag, sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_PREWRITE); @@ -3423,8 +3425,6 @@ bge_intr(void *xsc) /* Make sure the descriptor ring indexes are coherent. */ bus_dmamap_sync(sc->bge_cdata.bge_status_tag, sc->bge_cdata.bge_status_map, BUS_DMASYNC_POSTREAD); - bus_dmamap_sync(sc->bge_cdata.bge_status_tag, - sc->bge_cdata.bge_status_map, BUS_DMASYNC_PREREAD); if ((sc->bge_asicrev == BGE_ASICREV_BCM5700 && sc->bge_chipid != BGE_CHIPID_BCM5700_B2) || @@ -3445,6 +3445,9 @@ bge_intr(void *xsc) !IFQ_DRV_IS_EMPTY(&ifp->if_snd)) bge_start_locked(ifp); + bus_dmamap_sync(sc->bge_cdata.bge_status_tag, + sc->bge_cdata.bge_status_map, BUS_DMASYNC_PREREAD); + BGE_UNLOCK(sc); }
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