Author: cem Date: Tue Jan 5 20:42:19 2016 New Revision: 293221 URL: https://svnweb.freebsd.org/changeset/base/293221
Log: ioat(4): Add ioat_get_max_io_size() KPI Consumers need to know the permitted IO size to send maximally sized chunks to the hardware. Sponsored by: EMC / Isilon Storage Division Modified: head/share/man/man4/ioat.4 head/sys/dev/ioat/ioat.c head/sys/dev/ioat/ioat.h Modified: head/share/man/man4/ioat.4 ============================================================================== --- head/share/man/man4/ioat.4 Tue Jan 5 20:37:36 2016 (r293220) +++ head/share/man/man4/ioat.4 Tue Jan 5 20:42:19 2016 (r293221) @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 17, 2015 +.Dd January 5, 2016 .Dt IOAT 4 .Os .Sh NAME @@ -65,6 +65,8 @@ In .Fn ioat_put_dmaengine "bus_dmaengine_t dmaengine" .Ft int .Fn ioat_get_hwversion "bus_dmaengine_t dmaengine" +.Ft size_t +.Fn ioat_get_max_io_size "bus_dmaengine_t dmaengine" .Ft int .Fn ioat_set_interrupt_coalesce "bus_dmaengine_t dmaengine" "uint16_t delay" .Ft uint16_t Modified: head/sys/dev/ioat/ioat.c ============================================================================== --- head/sys/dev/ioat/ioat.c Tue Jan 5 20:37:36 2016 (r293220) +++ head/sys/dev/ioat/ioat.c Tue Jan 5 20:42:19 2016 (r293221) @@ -744,6 +744,15 @@ ioat_get_hwversion(bus_dmaengine_t dmaen return (ioat->version); } +size_t +ioat_get_max_io_size(bus_dmaengine_t dmaengine) +{ + struct ioat_softc *ioat; + + ioat = to_ioat_softc(dmaengine); + return (ioat->max_xfer_size); +} + int ioat_set_interrupt_coalesce(bus_dmaengine_t dmaengine, uint16_t delay) { Modified: head/sys/dev/ioat/ioat.h ============================================================================== --- head/sys/dev/ioat/ioat.h Tue Jan 5 20:37:36 2016 (r293220) +++ head/sys/dev/ioat/ioat.h Tue Jan 5 20:42:19 2016 (r293221) @@ -70,6 +70,7 @@ void ioat_put_dmaengine(bus_dmaengine_t /* Check the DMA engine's HW version */ int ioat_get_hwversion(bus_dmaengine_t dmaengine); +size_t ioat_get_max_io_size(bus_dmaengine_t dmaengine); /* * Set interrupt coalescing on a DMA channel. _______________________________________________ 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"