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// SPDX-License-Identifier: MIT
/*
* Copyright © 2019 Intel Corporation
*/
#include "i915_selftest.h"
#include "gt/intel_gt.h"
#include "selftests/igt_flush_test.h"
#include "selftests/mock_drm.h"
#include "huge_gem_object.h"
#include "mock_context.h"
static int igt_client_fill(void *arg)
{
struct drm_i915_private *i915 = arg;
struct intel_context *ce = i915->engine[BCS0]->kernel_context;
struct drm_i915_gem_object *obj;
struct rnd_state prng;
IGT_TIMEOUT(end);
u32 *vaddr;
int err = 0;
prandom_seed_state(&prng, i915_selftest.random_seed);
do {
const u32 max_block_size = S16_MAX * PAGE_SIZE;
u32 sz = min_t(u64, ce->vm->total >> 4, prandom_u32_state(&prng));
u32 phys_sz = sz % (max_block_size + 1);
u32 val = prandom_u32_state(&prng);
u32 i;
sz = round_up(sz, PAGE_SIZE);
phys_sz = round_up(phys_sz, PAGE_SIZE);
pr_debug("%s with phys_sz= %x, sz=%x, val=%x\n", __func__,
phys_sz, sz, val);
obj = huge_gem_object(i915, phys_sz, sz);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
goto err_flush;
}
vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_put;
}
/*
* XXX: The goal is move this to get_pages, so try to dirty the
* CPU cache first to check that we do the required clflush
* before scheduling the blt for !llc platforms. This matches
* some version of reality where at get_pages the pages
* themselves may not yet be coherent with the GPU(swap-in). If
* we are missing the flush then we should see the stale cache
* values after we do the set_to_cpu_domain and pick it up as a
* test failure.
*/
memset32(vaddr, val ^ 0xdeadbeaf,
huge_gem_object_phys_size(obj) / sizeof(u32));
if (!(obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE))
obj->cache_dirty = true;
err = i915_gem_schedule_fill_pages_blt(obj, ce, obj->mm.pages,
&obj->mm.page_sizes,
val);
if (err)
goto err_unpin;
i915_gem_object_lock(obj);
err = i915_gem_object_set_to_cpu_domain(obj, false);
i915_gem_object_unlock(obj);
if (err)
goto err_unpin;
for (i = 0; i < huge_gem_object_phys_size(obj) / sizeof(u32); ++i) {
if (vaddr[i] != val) {
pr_err("vaddr[%u]=%x, expected=%x\n", i,
vaddr[i], val);
err = -EINVAL;
goto err_unpin;
}
}
i915_gem_object_unpin_map(obj);
i915_gem_object_put(obj);
} while (!time_after(jiffies, end));
goto err_flush;
err_unpin:
i915_gem_object_unpin_map(obj);
err_put:
i915_gem_object_put(obj);
err_flush:
if (err == -ENOMEM)
err = 0;
return err;
}
int i915_gem_client_blt_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_client_fill),
};
if (intel_gt_is_wedged(&i915->gt))
return 0;
if (!HAS_ENGINE(i915, BCS0))
return 0;
return i915_live_subtests(tests, i915);
}
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