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igt/gem_streaming_writes: Bind into the GTT early

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If we are using a streaming GGTT write into the source, we need to
trigger an early fault in order to obtain a mappable offset. This is
required when later we start reserving execbuf object top-down to try
and avoid mappable space!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2015-07-28 18:59:47 +01:00
parent cd306d4e65
commit 40ebf95163
2 changed files with 36 additions and 4 deletions
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tests/gem_streaming_writes.c
+9 -4
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@@ -103,6 +103,7 @@ static void test_streaming(int fd, int mode, int sync)
break;
}
igt_assert(s);
*s = 0; /* fault the object into the mappable range first (for GTT) */
d = gem_mmap__cpu(fd, dst, 0, OBJECT_SIZE, PROT_READ);
igt_assert(d);
@@ -138,6 +139,9 @@ static void test_streaming(int fd, int mode, int sync)
reloc[2*i+1].read_domains = I915_GEM_DOMAIN_RENDER;
reloc[2*i+1].write_domain = 0;
}
igt_assert(__gem_execbuf(fd, &execbuf) == 0);
igt_assert_eq_u64(__src_offset, src_offset);
igt_assert_eq_u64(__dst_offset, dst_offset);
exec[2].relocation_count = 2;
execbuf.buffer_count = 3;
@@ -212,8 +216,8 @@ static void test_streaming(int fd, int mode, int sync)
execbuf.batch_start_offset = 64*n;
gem_execbuf(fd, &execbuf);
igt_assert(__src_offset == src_offset);
igt_assert(__dst_offset == dst_offset);
igt_assert_eq_u64(__src_offset, src_offset);
igt_assert_eq_u64(__dst_offset, dst_offset);
batch[b].offset = exec[2].offset;
}
@@ -292,6 +296,7 @@ static void test_batch(int fd, int mode, int reverse)
break;
}
igt_assert(base);
*base = 0; /* fault the object into the mappable range first */
gem_write(fd, exec[2].handle, 0, tmp, sizeof(tmp));
memset(&execbuf, 0, sizeof(execbuf));
@@ -349,8 +354,8 @@ static void test_batch(int fd, int mode, int reverse)
base[k++] = MI_BATCH_BUFFER_END;
gem_execbuf(fd, &execbuf);
igt_assert(__src_offset == src_offset);
igt_assert(__dst_offset == dst_offset);
igt_assert_eq_u64(__src_offset, src_offset);
igt_assert_eq_u64(__dst_offset, dst_offset);
}
gem_set_domain(fd, dst, I915_GEM_DOMAIN_CPU, 0);