Date: Thu, 17 Dec 2015 23:21:38 +0000 (UTC) From: "Conrad E. Meyer" <cem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r292413 - in head: share/man/man4 sys/dev/ioat Message-ID: <201512172321.tBHNLcbd040524@repo.freebsd.org>
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Author: cem Date: Thu Dec 17 23:21:37 2015 New Revision: 292413 URL: https://svnweb.freebsd.org/changeset/base/292413 Log: ioat(4): Add an API to get HW revision Different revisions support different operations. Refer to Intel External Design Specifications to figure out what your hardware supports. 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 head/sys/dev/ioat/ioat_hw.h Modified: head/share/man/man4/ioat.4 ============================================================================== --- head/share/man/man4/ioat.4 Thu Dec 17 23:13:04 2015 (r292412) +++ head/share/man/man4/ioat.4 Thu Dec 17 23:21:37 2015 (r292413) @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 14, 2015 +.Dd December 17, 2015 .Dt IOAT 4 .Os .Sh NAME @@ -64,6 +64,8 @@ In .Ft void .Fn ioat_put_dmaengine "bus_dmaengine_t dmaengine" .Ft int +.Fn ioat_get_hwversion "bus_dmaengine_t dmaengine" +.Ft int .Fn ioat_set_interrupt_coalesce "bus_dmaengine_t dmaengine" "uint16_t delay" .Ft uint16_t .Fn ioat_get_max_coalesce_period "bus_dmaengine_t dmaengine" Modified: head/sys/dev/ioat/ioat.c ============================================================================== --- head/sys/dev/ioat/ioat.c Thu Dec 17 23:13:04 2015 (r292412) +++ head/sys/dev/ioat/ioat.c Thu Dec 17 23:21:37 2015 (r292413) @@ -736,6 +736,15 @@ ioat_put_dmaengine(bus_dmaengine_t dmaen } int +ioat_get_hwversion(bus_dmaengine_t dmaengine) +{ + struct ioat_softc *ioat; + + ioat = to_ioat_softc(dmaengine); + return (ioat->version); +} + +int ioat_set_interrupt_coalesce(bus_dmaengine_t dmaengine, uint16_t delay) { struct ioat_softc *ioat; Modified: head/sys/dev/ioat/ioat.h ============================================================================== --- head/sys/dev/ioat/ioat.h Thu Dec 17 23:13:04 2015 (r292412) +++ head/sys/dev/ioat/ioat.h Thu Dec 17 23:21:37 2015 (r292413) @@ -48,6 +48,14 @@ __FBSDID("$FreeBSD$"); #define DMA_NO_WAIT 0x2 #define DMA_ALL_FLAGS (DMA_INT_EN | DMA_NO_WAIT) +/* + * Hardware revision number. Different hardware revisions support different + * features. For example, 3.2 cannot read from MMIO space, while 3.3 can. + */ +#define IOAT_VER_3_0 0x30 +#define IOAT_VER_3_2 0x32 +#define IOAT_VER_3_3 0x33 + typedef void *bus_dmaengine_t; struct bus_dmadesc; typedef void (*bus_dmaengine_callback_t)(void *arg, int error); @@ -60,6 +68,9 @@ bus_dmaengine_t ioat_get_dmaengine(uint3 /* Release the DMA channel */ void ioat_put_dmaengine(bus_dmaengine_t dmaengine); +/* Check the DMA engine's HW version */ +int ioat_get_hwversion(bus_dmaengine_t dmaengine); + /* * Set interrupt coalescing on a DMA channel. * Modified: head/sys/dev/ioat/ioat_hw.h ============================================================================== --- head/sys/dev/ioat/ioat_hw.h Thu Dec 17 23:13:04 2015 (r292412) +++ head/sys/dev/ioat/ioat_hw.h Thu Dec 17 23:21:37 2015 (r292413) @@ -46,9 +46,6 @@ __FBSDID("$FreeBSD$"); #define IOAT_CBVER_OFFSET 0x08 -#define IOAT_VER_3_0 0x30 -#define IOAT_VER_3_3 0x33 - #define IOAT_INTRDELAY_OFFSET 0x0C #define IOAT_INTRDELAY_SUPPORTED (1 << 15) /* Reserved. (1 << 14) */
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