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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