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authorConrad Meyer <cem@FreeBSD.org>2015-08-24 19:32:03 +0000
committerConrad Meyer <cem@FreeBSD.org>2015-08-24 19:32:03 +0000
commite974f91c38cfb7a97b684082089d6dae948a68fd (patch)
treee39b5d8a8f10f490748aeb45dc074c2ddc3eb06b /tools/tools/ioat/ioatcontrol.c
parent3166be0fb42f6d600da7dd67bb1b2c6ce5bda529 (diff)
downloadsrc-e974f91c38cfb7a97b684082089d6dae948a68fd.tar.gz
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Import ioat(4) driver
I/OAT is also referred to as Crystal Beach DMA and is a Platform Storage Extension (PSE) on some Intel server platforms. This driver currently supports DMA descriptors only and is part of a larger effort to upstream an interconnect between multiple systems using the Non-Transparent Bridge (NTB) PSE. For now, this driver is only built on AMD64 platforms. It may be ported to work on i386 later, if that is desired. The hardware is exclusive to x86. Further documentation on ioat(4), including API documentation and usage, can be found in the new manual page. Bring in a test tool, ioatcontrol(8), in tools/tools/ioat. The test tool is not hooked up to the build and is not intended for end users. Submitted by: jimharris, Carl Delsey <carl.r.delsey@intel.com> Reviewed by: jimharris (reviewed my changes) Approved by: markj (mentor) Relnotes: yes Sponsored by: Intel Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D3456
Notes
Notes: svn path=/head/; revision=287117
Diffstat (limited to 'tools/tools/ioat/ioatcontrol.c')
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diff --git a/tools/tools/ioat/ioatcontrol.c b/tools/tools/ioat/ioatcontrol.c
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+/*-
+ * Copyright (C) 2012 Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+__FBSDID("$FreeBSD$");
+
+#include <sys/ioctl.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+#include "ioat_test.h"
+
+int
+main(int argc, char **argv)
+{
+ struct ioat_test t;
+ int fd;
+
+ if (argc < 3) {
+ printf("Usage: %s <channel #> <num_loops>\n", argv[0]);
+ return (EX_USAGE);
+ }
+
+ t.channel_index = atoi(argv[1]);
+ if (t.channel_index > 8) {
+ printf("Channel number must be between 0 and 7.\n");
+ return (EX_USAGE);
+ }
+
+ t.num_loops = atoi(argv[2]);
+
+ fd = open("/dev/ioat_test", O_RDWR);
+ if (fd < 0) {
+ printf("Cannot open /dev/ioat_test\n");
+ return (EX_UNAVAILABLE);
+ }
+
+ (void)ioctl(fd, IOAT_DMATEST, &t);
+ close(fd);
+
+ return (t.status);
+}