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// SPDX-License-Identifier: GPL-2.0 AND MIT
/*
* Copyright © 2022 Intel Corporation
*/
#include <kunit/test.h>
#include <kunit/visibility.h>
#include "tests/xe_bo_test.h"
#include "tests/xe_pci_test.h"
#include "tests/xe_test.h"
#include "xe_bo_evict.h"
#include "xe_pci.h"
static int ccs_test_migrate(struct xe_gt *gt, struct xe_bo *bo,
bool clear, u64 get_val, u64 assign_val,
struct kunit *test)
{
struct dma_fence *fence;
struct ttm_tt *ttm;
struct page *page;
pgoff_t ccs_page;
long timeout;
u64 *cpu_map;
int ret;
u32 offset;
/* Move bo to VRAM if not already there. */
ret = xe_bo_validate(bo, NULL, false);
if (ret) {
KUNIT_FAIL(test, "Failed to validate bo.\n");
return ret;
}
/* Optionally clear bo *and* CCS data in VRAM. */
if (clear) {
fence = xe_migrate_clear(gt->migrate, bo, bo->ttm.resource);
if (IS_ERR(fence)) {
KUNIT_FAIL(test, "Failed to submit bo clear.\n");
return PTR_ERR(fence);
}
dma_fence_put(fence);
}
/* Evict to system. CCS data should be copied. */
ret = xe_bo_evict(bo, true);
if (ret) {
KUNIT_FAIL(test, "Failed to evict bo.\n");
return ret;
}
/* Sync all migration blits */
timeout = dma_resv_wait_timeout(bo->ttm.base.resv,
DMA_RESV_USAGE_KERNEL,
true,
5 * HZ);
if (timeout <= 0) {
KUNIT_FAIL(test, "Failed to sync bo eviction.\n");
return -ETIME;
}
/*
* Bo with CCS data is now in system memory. Verify backing store
* and data integrity. Then assign for the next testing round while
* we still have a CPU map.
*/
ttm = bo->ttm.ttm;
if (!ttm || !ttm_tt_is_populated(ttm)) {
KUNIT_FAIL(test, "Bo was not in expected placement.\n");
return -EINVAL;
}
ccs_page = xe_bo_ccs_pages_start(bo) >> PAGE_SHIFT;
if (ccs_page >= ttm->num_pages) {
KUNIT_FAIL(test, "No TTM CCS pages present.\n");
return -EINVAL;
}
page = ttm->pages[ccs_page];
cpu_map = kmap_local_page(page);
/* Check first CCS value */
if (cpu_map[0] != get_val) {
KUNIT_FAIL(test,
"Expected CCS readout 0x%016llx, got 0x%016llx.\n",
(unsigned long long)get_val,
(unsigned long long)cpu_map[0]);
ret = -EINVAL;
}
/* Check last CCS value, or at least last value in page. */
offset = xe_device_ccs_bytes(gt->xe, bo->size);
offset = min_t(u32, offset, PAGE_SIZE) / sizeof(u64) - 1;
if (cpu_map[offset] != get_val) {
KUNIT_FAIL(test,
"Expected CCS readout 0x%016llx, got 0x%016llx.\n",
(unsigned long long)get_val,
(unsigned long long)cpu_map[offset]);
ret = -EINVAL;
}
cpu_map[0] = assign_val;
cpu_map[offset] = assign_val;
kunmap_local(cpu_map);
return ret;
}
static void ccs_test_run_gt(struct xe_device *xe, struct xe_gt *gt,
struct kunit *test)
{
struct xe_bo *bo;
u32 vram_bit;
int ret;
/* TODO: Sanity check */
vram_bit = XE_BO_CREATE_VRAM0_BIT << gt->info.vram_id;
kunit_info(test, "Testing gt id %u vram id %u\n", gt->info.id,
gt->info.vram_id);
bo = xe_bo_create_locked(xe, NULL, NULL, SZ_1M, ttm_bo_type_device,
vram_bit);
if (IS_ERR(bo)) {
KUNIT_FAIL(test, "Failed to create bo.\n");
return;
}
kunit_info(test, "Verifying that CCS data is cleared on creation.\n");
ret = ccs_test_migrate(gt, bo, false, 0ULL, 0xdeadbeefdeadbeefULL,
test);
if (ret)
goto out_unlock;
kunit_info(test, "Verifying that CCS data survives migration.\n");
ret = ccs_test_migrate(gt, bo, false, 0xdeadbeefdeadbeefULL,
0xdeadbeefdeadbeefULL, test);
if (ret)
goto out_unlock;
kunit_info(test, "Verifying that CCS data can be properly cleared.\n");
ret = ccs_test_migrate(gt, bo, true, 0ULL, 0ULL, test);
out_unlock:
xe_bo_unlock_no_vm(bo);
xe_bo_put(bo);
}
static int ccs_test_run_device(struct xe_device *xe)
{
struct kunit *test = xe_cur_kunit();
struct xe_gt *gt;
int id;
if (!xe_device_has_flat_ccs(xe)) {
kunit_info(test, "Skipping non-flat-ccs device.\n");
return 0;
}
for_each_gt(gt, xe, id)
ccs_test_run_gt(xe, gt, test);
return 0;
}
void xe_ccs_migrate_kunit(struct kunit *test)
{
xe_call_for_each_device(ccs_test_run_device);
}
EXPORT_SYMBOL_IF_KUNIT(xe_ccs_migrate_kunit);
static int evict_test_run_gt(struct xe_device *xe, struct xe_gt *gt, struct kunit *test)
{
struct xe_bo *bo, *external;
unsigned int bo_flags = XE_BO_CREATE_USER_BIT |
XE_BO_CREATE_VRAM_IF_DGFX(gt);
struct xe_vm *vm = xe_migrate_get_vm(xe_device_get_root_tile(xe)->primary_gt.migrate);
struct ww_acquire_ctx ww;
int err, i;
kunit_info(test, "Testing device %s gt id %u vram id %u\n",
dev_name(xe->drm.dev), gt->info.id, gt->info.vram_id);
for (i = 0; i < 2; ++i) {
xe_vm_lock(vm, &ww, 0, false);
bo = xe_bo_create(xe, NULL, vm, 0x10000, ttm_bo_type_device,
bo_flags);
xe_vm_unlock(vm, &ww);
if (IS_ERR(bo)) {
KUNIT_FAIL(test, "bo create err=%pe\n", bo);
break;
}
external = xe_bo_create(xe, NULL, NULL, 0x10000,
ttm_bo_type_device, bo_flags);
if (IS_ERR(external)) {
KUNIT_FAIL(test, "external bo create err=%pe\n", external);
goto cleanup_bo;
}
xe_bo_lock(external, &ww, 0, false);
err = xe_bo_pin_external(external);
xe_bo_unlock(external, &ww);
if (err) {
KUNIT_FAIL(test, "external bo pin err=%pe\n",
ERR_PTR(err));
goto cleanup_external;
}
err = xe_bo_evict_all(xe);
if (err) {
KUNIT_FAIL(test, "evict err=%pe\n", ERR_PTR(err));
goto cleanup_all;
}
err = xe_bo_restore_kernel(xe);
if (err) {
KUNIT_FAIL(test, "restore kernel err=%pe\n",
ERR_PTR(err));
goto cleanup_all;
}
err = xe_bo_restore_user(xe);
if (err) {
KUNIT_FAIL(test, "restore user err=%pe\n", ERR_PTR(err));
goto cleanup_all;
}
if (!xe_bo_is_vram(external)) {
KUNIT_FAIL(test, "external bo is not vram\n");
err = -EPROTO;
goto cleanup_all;
}
if (xe_bo_is_vram(bo)) {
KUNIT_FAIL(test, "bo is vram\n");
err = -EPROTO;
goto cleanup_all;
}
if (i) {
down_read(&vm->lock);
xe_vm_lock(vm, &ww, 0, false);
err = xe_bo_validate(bo, bo->vm, false);
xe_vm_unlock(vm, &ww);
up_read(&vm->lock);
if (err) {
KUNIT_FAIL(test, "bo valid err=%pe\n",
ERR_PTR(err));
goto cleanup_all;
}
xe_bo_lock(external, &ww, 0, false);
err = xe_bo_validate(external, NULL, false);
xe_bo_unlock(external, &ww);
if (err) {
KUNIT_FAIL(test, "external bo valid err=%pe\n",
ERR_PTR(err));
goto cleanup_all;
}
}
xe_bo_lock(external, &ww, 0, false);
xe_bo_unpin_external(external);
xe_bo_unlock(external, &ww);
xe_bo_put(external);
xe_bo_put(bo);
continue;
cleanup_all:
xe_bo_lock(external, &ww, 0, false);
xe_bo_unpin_external(external);
xe_bo_unlock(external, &ww);
cleanup_external:
xe_bo_put(external);
cleanup_bo:
xe_bo_put(bo);
break;
}
xe_vm_put(vm);
return 0;
}
static int evict_test_run_device(struct xe_device *xe)
{
struct kunit *test = xe_cur_kunit();
struct xe_gt *gt;
int id;
if (!IS_DGFX(xe)) {
kunit_info(test, "Skipping non-discrete device %s.\n",
dev_name(xe->drm.dev));
return 0;
}
for_each_gt(gt, xe, id)
evict_test_run_gt(xe, gt, test);
return 0;
}
void xe_bo_evict_kunit(struct kunit *test)
{
xe_call_for_each_device(evict_test_run_device);
}
EXPORT_SYMBOL_IF_KUNIT(xe_bo_evict_kunit);
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