diff options
| author | cem <cem@FreeBSD.org> | 2015-12-17 23:21:37 +0000 |
|---|---|---|
| committer | cem <cem@FreeBSD.org> | 2015-12-17 23:21:37 +0000 |
| commit | a12e9d2b9f45e8ba9e4392031bda53e5d047180d (patch) | |
| tree | 7d5f7b77f3523b642b84f070e2d00a3bbf190c25 | |
| parent | cdf1c8d7c1a6a32bb1374533b42a598de487eef7 (diff) | |
| download | FreeBSD-src-a12e9d2b9f45e8ba9e4392031bda53e5d047180d.zip FreeBSD-src-a12e9d2b9f45e8ba9e4392031bda53e5d047180d.tar.gz | |
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
| -rw-r--r-- | share/man/man4/ioat.4 | 4 | ||||
| -rw-r--r-- | sys/dev/ioat/ioat.c | 9 | ||||
| -rw-r--r-- | sys/dev/ioat/ioat.h | 11 | ||||
| -rw-r--r-- | sys/dev/ioat/ioat_hw.h | 3 |
4 files changed, 23 insertions, 4 deletions
diff --git a/share/man/man4/ioat.4 b/share/man/man4/ioat.4 index 7ba7768..dd467b2 100644 --- a/share/man/man4/ioat.4 +++ b/share/man/man4/ioat.4 @@ -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" diff --git a/sys/dev/ioat/ioat.c b/sys/dev/ioat/ioat.c index 12a6fe4..4b6d7df 100644 --- a/sys/dev/ioat/ioat.c +++ b/sys/dev/ioat/ioat.c @@ -736,6 +736,15 @@ ioat_put_dmaengine(bus_dmaengine_t dmaengine) } 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; diff --git a/sys/dev/ioat/ioat.h b/sys/dev/ioat/ioat.h index 5c64af1..e8f47ae 100644 --- a/sys/dev/ioat/ioat.h +++ b/sys/dev/ioat/ioat.h @@ -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(uint32_t channel_index); /* 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. * diff --git a/sys/dev/ioat/ioat_hw.h b/sys/dev/ioat/ioat_hw.h index 1aeee2d..46ffaeb 100644 --- a/sys/dev/ioat/ioat_hw.h +++ b/sys/dev/ioat/ioat_hw.h @@ -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) */ |
