Revision e3818697e1d9140d0b990fecf4429d40c41ca0b5 authored by Chris Wilson on 09 January 2017, 11:19:32 UTC, committed by Jani Nikula on 08 February 2017, 11:10:24 UTC
On a non-llc system, the objects are created with .cache_level = CACHE_NONE and so the transition to uncached for scanout is a no-op. However, if the object was never written to, it will still be in the CPU domain (having been zeroed out by shmemfs). Those cachelines need to be flushed prior to display. Reported-and-tested-by: Vito Caputo Fixes: a6a7cc4b7db6 ("drm/i915: Always flush the dirty CPU cache when pinning the scanout") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.10-rc1+ Link: http://patchwork.freedesktop.org/patch/msgid/20170109111932.6342-1-chris@chris-wilson.co.uk Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> (cherry picked from commit 69aeafeae9b30d797c439a30d1a4ccc8dc5b0eb0) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
1 parent 5351fbb
test_uuid.c
/*
* Test cases for lib/uuid.c module.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/uuid.h>
struct test_uuid_data {
const char *uuid;
uuid_le le;
uuid_be be;
};
static const struct test_uuid_data test_uuid_test_data[] = {
{
.uuid = "c33f4995-3701-450e-9fbf-206a2e98e576",
.le = UUID_LE(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
.be = UUID_BE(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76),
},
{
.uuid = "64b4371c-77c1-48f9-8221-29f054fc023b",
.le = UUID_LE(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
.be = UUID_BE(0x64b4371c, 0x77c1, 0x48f9, 0x82, 0x21, 0x29, 0xf0, 0x54, 0xfc, 0x02, 0x3b),
},
{
.uuid = "0cb4ddff-a545-4401-9d06-688af53e7f84",
.le = UUID_LE(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
.be = UUID_BE(0x0cb4ddff, 0xa545, 0x4401, 0x9d, 0x06, 0x68, 0x8a, 0xf5, 0x3e, 0x7f, 0x84),
},
};
static const char * const test_uuid_wrong_data[] = {
"c33f4995-3701-450e-9fbf206a2e98e576 ", /* no hyphen(s) */
"64b4371c-77c1-48f9-8221-29f054XX023b", /* invalid character(s) */
"0cb4ddff-a545-4401-9d06-688af53e", /* not enough data */
};
static unsigned total_tests __initdata;
static unsigned failed_tests __initdata;
static void __init test_uuid_failed(const char *prefix, bool wrong, bool be,
const char *data, const char *actual)
{
pr_err("%s test #%u %s %s data: '%s'\n",
prefix,
total_tests,
wrong ? "passed on wrong" : "failed on",
be ? "BE" : "LE",
data);
if (actual && *actual)
pr_err("%s test #%u actual data: '%s'\n",
prefix,
total_tests,
actual);
failed_tests++;
}
static void __init test_uuid_test(const struct test_uuid_data *data)
{
uuid_le le;
uuid_be be;
char buf[48];
/* LE */
total_tests++;
if (uuid_le_to_bin(data->uuid, &le))
test_uuid_failed("conversion", false, false, data->uuid, NULL);
total_tests++;
if (uuid_le_cmp(data->le, le)) {
sprintf(buf, "%pUl", &le);
test_uuid_failed("cmp", false, false, data->uuid, buf);
}
/* BE */
total_tests++;
if (uuid_be_to_bin(data->uuid, &be))
test_uuid_failed("conversion", false, true, data->uuid, NULL);
total_tests++;
if (uuid_be_cmp(data->be, be)) {
sprintf(buf, "%pUb", &be);
test_uuid_failed("cmp", false, true, data->uuid, buf);
}
}
static void __init test_uuid_wrong(const char *data)
{
uuid_le le;
uuid_be be;
/* LE */
total_tests++;
if (!uuid_le_to_bin(data, &le))
test_uuid_failed("negative", true, false, data, NULL);
/* BE */
total_tests++;
if (!uuid_be_to_bin(data, &be))
test_uuid_failed("negative", true, true, data, NULL);
}
static int __init test_uuid_init(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(test_uuid_test_data); i++)
test_uuid_test(&test_uuid_test_data[i]);
for (i = 0; i < ARRAY_SIZE(test_uuid_wrong_data); i++)
test_uuid_wrong(test_uuid_wrong_data[i]);
if (failed_tests == 0)
pr_info("all %u tests passed\n", total_tests);
else
pr_err("failed %u out of %u tests\n", failed_tests, total_tests);
return failed_tests ? -EINVAL : 0;
}
module_init(test_uuid_init);
static void __exit test_uuid_exit(void)
{
/* do nothing */
}
module_exit(test_uuid_exit);
MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
MODULE_LICENSE("Dual BSD/GPL");
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