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// SPDX-License-Identifier: MIT
/*
* Copyright © 2020-2022 Intel Corporation
*/
#include <kunit/test.h>
#include "tests/xe_migrate_test.h"
#include "xe_pci.h"
static bool sanity_fence_failed(struct xe_device *xe, struct dma_fence *fence,
const char *str, struct kunit *test)
{
long ret;
if (IS_ERR(fence)) {
KUNIT_FAIL(test, "Failed to create fence for %s: %li\n", str,
PTR_ERR(fence));
return true;
}
if (!fence)
return true;
ret = dma_fence_wait_timeout(fence, false, 5 * HZ);
if (ret <= 0) {
KUNIT_FAIL(test, "Fence timed out for %s: %li\n", str, ret);
return true;
}
return false;
}
static int run_sanity_job(struct xe_migrate *m, struct xe_device *xe,
struct xe_bb *bb, u32 second_idx, const char *str,
struct kunit *test)
{
u64 batch_base = xe_migrate_batch_base(m, xe->info.supports_usm);
struct xe_sched_job *job = xe_bb_create_migration_job(m->eng, bb,
batch_base,
second_idx);
struct dma_fence *fence;
if (IS_ERR(job)) {
KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
PTR_ERR(job));
return PTR_ERR(job);
}
xe_sched_job_arm(job);
fence = dma_fence_get(&job->drm.s_fence->finished);
xe_sched_job_push(job);
if (sanity_fence_failed(xe, fence, str, test))
return -ETIMEDOUT;
dma_fence_put(fence);
kunit_info(test, "%s: Job completed\n", str);
return 0;
}
static void
sanity_populate_cb(struct xe_migrate_pt_update *pt_update,
struct xe_gt *gt, struct iosys_map *map, void *dst,
u32 qword_ofs, u32 num_qwords,
const struct xe_vm_pgtable_update *update)
{
struct migrate_test_params *p =
to_migrate_test_params(xe_cur_kunit_priv(XE_TEST_LIVE_MIGRATE));
int i;
u64 *ptr = dst;
u64 value;
for (i = 0; i < num_qwords; i++) {
value = (qword_ofs + i - update->ofs) * 0x1111111111111111ULL;
if (map)
xe_map_wr(gt_to_xe(gt), map, (qword_ofs + i) *
sizeof(u64), u64, value);
else
ptr[i] = value;
}
kunit_info(xe_cur_kunit(), "Used %s.\n", map ? "CPU" : "GPU");
if (p->force_gpu && map)
KUNIT_FAIL(xe_cur_kunit(), "GPU pagetable update used CPU.\n");
}
static const struct xe_migrate_pt_update_ops sanity_ops = {
.populate = sanity_populate_cb,
};
#define check(_retval, _expected, str, _test) \
do { if ((_retval) != (_expected)) { \
KUNIT_FAIL(_test, "Sanity check failed: " str \
" expected %llx, got %llx\n", \
(u64)(_expected), (u64)(_retval)); \
} } while (0)
static void test_copy(struct xe_migrate *m, struct xe_bo *bo,
struct kunit *test)
{
struct xe_device *xe = gt_to_xe(m->gt);
u64 retval, expected = 0;
bool big = bo->size >= SZ_2M;
struct dma_fence *fence;
const char *str = big ? "Copying big bo" : "Copying small bo";
int err;
struct xe_bo *sysmem = xe_bo_create_locked(xe, m->gt, NULL,
bo->size,
ttm_bo_type_kernel,
XE_BO_CREATE_SYSTEM_BIT);
if (IS_ERR(sysmem)) {
KUNIT_FAIL(test, "Failed to allocate sysmem bo for %s: %li\n",
str, PTR_ERR(sysmem));
return;
}
err = xe_bo_validate(sysmem, NULL, false);
if (err) {
KUNIT_FAIL(test, "Failed to validate system bo for %s: %li\n",
str, err);
goto out_unlock;
}
err = xe_bo_vmap(sysmem);
if (err) {
KUNIT_FAIL(test, "Failed to vmap system bo for %s: %li\n",
str, err);
goto out_unlock;
}
xe_map_memset(xe, &sysmem->vmap, 0, 0xd0, sysmem->size);
fence = xe_migrate_clear(m, sysmem, sysmem->ttm.resource);
if (!sanity_fence_failed(xe, fence, big ? "Clearing sysmem big bo" :
"Clearing sysmem small bo", test)) {
retval = xe_map_rd(xe, &sysmem->vmap, 0, u64);
check(retval, expected, "sysmem first offset should be cleared",
test);
retval = xe_map_rd(xe, &sysmem->vmap, sysmem->size - 8, u64);
check(retval, expected, "sysmem last offset should be cleared",
test);
}
dma_fence_put(fence);
/* Try to copy 0xc0 from sysmem to vram with 2MB or 64KiB/4KiB pages */
xe_map_memset(xe, &sysmem->vmap, 0, 0xc0, sysmem->size);
xe_map_memset(xe, &bo->vmap, 0, 0xd0, bo->size);
expected = 0xc0c0c0c0c0c0c0c0;
fence = xe_migrate_copy(m, sysmem, sysmem->ttm.resource,
bo->ttm.resource);
if (!sanity_fence_failed(xe, fence, big ? "Copying big bo sysmem -> vram" :
"Copying small bo sysmem -> vram", test)) {
retval = xe_map_rd(xe, &bo->vmap, 0, u64);
check(retval, expected,
"sysmem -> vram bo first offset should be copied", test);
retval = xe_map_rd(xe, &bo->vmap, bo->size - 8, u64);
check(retval, expected,
"sysmem -> vram bo offset should be copied", test);
}
dma_fence_put(fence);
/* And other way around.. slightly hacky.. */
xe_map_memset(xe, &sysmem->vmap, 0, 0xd0, sysmem->size);
xe_map_memset(xe, &bo->vmap, 0, 0xc0, bo->size);
fence = xe_migrate_copy(m, sysmem, bo->ttm.resource,
sysmem->ttm.resource);
if (!sanity_fence_failed(xe, fence, big ? "Copying big bo vram -> sysmem" :
"Copying small bo vram -> sysmem", test)) {
retval = xe_map_rd(xe, &sysmem->vmap, 0, u64);
check(retval, expected,
"vram -> sysmem bo first offset should be copied", test);
retval = xe_map_rd(xe, &sysmem->vmap, bo->size - 8, u64);
check(retval, expected,
"vram -> sysmem bo last offset should be copied", test);
}
dma_fence_put(fence);
xe_bo_vunmap(sysmem);
out_unlock:
xe_bo_unlock_no_vm(sysmem);
xe_bo_put(sysmem);
}
static void test_pt_update(struct xe_migrate *m, struct xe_bo *pt,
struct kunit *test, bool force_gpu)
{
struct xe_device *xe = gt_to_xe(m->gt);
struct dma_fence *fence;
u64 retval, expected;
ktime_t then, now;
int i;
struct xe_vm_pgtable_update update = {
.ofs = 1,
.qwords = 0x10,
.pt_bo = pt,
};
struct xe_migrate_pt_update pt_update = {
.ops = &sanity_ops,
};
struct migrate_test_params p = {
.base.id = XE_TEST_LIVE_MIGRATE,
.force_gpu = force_gpu,
};
test->priv = &p;
/* Test xe_migrate_update_pgtables() updates the pagetable as expected */
expected = 0xf0f0f0f0f0f0f0f0ULL;
xe_map_memset(xe, &pt->vmap, 0, (u8)expected, pt->size);
then = ktime_get();
fence = xe_migrate_update_pgtables(m, NULL, NULL, m->eng, &update, 1,
NULL, 0, &pt_update);
now = ktime_get();
if (sanity_fence_failed(xe, fence, "Migration pagetable update", test))
return;
kunit_info(test, "Updating without syncing took %llu us,\n",
(unsigned long long)ktime_to_us(ktime_sub(now, then)));
dma_fence_put(fence);
retval = xe_map_rd(xe, &pt->vmap, 0, u64);
check(retval, expected, "PTE[0] must stay untouched", test);
for (i = 0; i < update.qwords; i++) {
retval = xe_map_rd(xe, &pt->vmap, (update.ofs + i) * 8, u64);
check(retval, i * 0x1111111111111111ULL, "PTE update", test);
}
retval = xe_map_rd(xe, &pt->vmap, 8 * (update.ofs + update.qwords),
u64);
check(retval, expected, "PTE[0x11] must stay untouched", test);
}
static void xe_migrate_sanity_test(struct xe_migrate *m, struct kunit *test)
{
struct xe_gt *gt = m->gt;
struct xe_device *xe = gt_to_xe(gt);
struct xe_bo *pt, *bo = m->pt_bo, *big, *tiny;
struct xe_res_cursor src_it;
struct dma_fence *fence;
u64 retval, expected;
struct xe_bb *bb;
int err;
u8 id = gt->info.id;
err = xe_bo_vmap(bo);
if (err) {
KUNIT_FAIL(test, "Failed to vmap our pagetables: %li\n",
PTR_ERR(bo));
return;
}
big = xe_bo_create_pin_map(xe, m->gt, m->eng->vm, SZ_4M,
ttm_bo_type_kernel,
XE_BO_CREATE_VRAM_IF_DGFX(m->gt) |
XE_BO_CREATE_PINNED_BIT);
if (IS_ERR(big)) {
KUNIT_FAIL(test, "Failed to allocate bo: %li\n", PTR_ERR(big));
goto vunmap;
}
pt = xe_bo_create_pin_map(xe, m->gt, m->eng->vm, GEN8_PAGE_SIZE,
ttm_bo_type_kernel,
XE_BO_CREATE_VRAM_IF_DGFX(m->gt) |
XE_BO_CREATE_PINNED_BIT);
if (IS_ERR(pt)) {
KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
PTR_ERR(pt));
goto free_big;
}
tiny = xe_bo_create_pin_map(xe, m->gt, m->eng->vm,
2 * SZ_4K,
ttm_bo_type_kernel,
XE_BO_CREATE_VRAM_IF_DGFX(m->gt) |
XE_BO_CREATE_PINNED_BIT);
if (IS_ERR(tiny)) {
KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
PTR_ERR(pt));
goto free_pt;
}
bb = xe_bb_new(m->gt, 32, xe->info.supports_usm);
if (IS_ERR(bb)) {
KUNIT_FAIL(test, "Failed to create batchbuffer: %li\n",
PTR_ERR(bb));
goto free_tiny;
}
kunit_info(test, "Starting tests, top level PT addr: %lx, special pagetable base addr: %lx\n",
(unsigned long)xe_bo_main_addr(m->eng->vm->pt_root[id]->bo, GEN8_PAGE_SIZE),
(unsigned long)xe_bo_main_addr(m->pt_bo, GEN8_PAGE_SIZE));
/* First part of the test, are we updating our pagetable bo with a new entry? */
xe_map_wr(xe, &bo->vmap, GEN8_PAGE_SIZE * (NUM_KERNEL_PDE - 1), u64, 0xdeaddeadbeefbeef);
expected = gen8_pte_encode(NULL, pt, 0, XE_CACHE_WB, 0, 0);
if (m->eng->vm->flags & XE_VM_FLAGS_64K)
expected |= GEN12_PTE_PS64;
xe_res_first(pt->ttm.resource, 0, pt->size, &src_it);
emit_pte(m, bb, NUM_KERNEL_PDE - 1, xe_bo_is_vram(pt),
&src_it, GEN8_PAGE_SIZE, pt);
run_sanity_job(m, xe, bb, bb->len, "Writing PTE for our fake PT", test);
retval = xe_map_rd(xe, &bo->vmap, GEN8_PAGE_SIZE * (NUM_KERNEL_PDE - 1),
u64);
check(retval, expected, "PTE entry write", test);
/* Now try to write data to our newly mapped 'pagetable', see if it succeeds */
bb->len = 0;
bb->cs[bb->len++] = MI_BATCH_BUFFER_END;
xe_map_wr(xe, &pt->vmap, 0, u32, 0xdeaddead);
expected = 0;
emit_clear(m->gt, bb, xe_migrate_vm_addr(NUM_KERNEL_PDE - 1, 0), 4, 4,
IS_DGFX(xe));
run_sanity_job(m, xe, bb, 1, "Writing to our newly mapped pagetable",
test);
retval = xe_map_rd(xe, &pt->vmap, 0, u32);
check(retval, expected, "Write to PT after adding PTE", test);
/* Sanity checks passed, try the full ones! */
/* Clear a small bo */
kunit_info(test, "Clearing small buffer object\n");
xe_map_memset(xe, &tiny->vmap, 0, 0x22, tiny->size);
expected = 0;
fence = xe_migrate_clear(m, tiny, tiny->ttm.resource);
if (sanity_fence_failed(xe, fence, "Clearing small bo", test))
goto out;
dma_fence_put(fence);
retval = xe_map_rd(xe, &tiny->vmap, 0, u32);
check(retval, expected, "Command clear small first value", test);
retval = xe_map_rd(xe, &tiny->vmap, tiny->size - 4, u32);
check(retval, expected, "Command clear small last value", test);
if (IS_DGFX(xe)) {
kunit_info(test, "Copying small buffer object to system\n");
test_copy(m, tiny, test);
}
/* Clear a big bo */
kunit_info(test, "Clearing big buffer object\n");
xe_map_memset(xe, &big->vmap, 0, 0x11, big->size);
expected = 0;
fence = xe_migrate_clear(m, big, big->ttm.resource);
if (sanity_fence_failed(xe, fence, "Clearing big bo", test))
goto out;
dma_fence_put(fence);
retval = xe_map_rd(xe, &big->vmap, 0, u32);
check(retval, expected, "Command clear big first value", test);
retval = xe_map_rd(xe, &big->vmap, big->size - 4, u32);
check(retval, expected, "Command clear big last value", test);
if (IS_DGFX(xe)) {
kunit_info(test, "Copying big buffer object to system\n");
test_copy(m, big, test);
}
kunit_info(test, "Testing page table update using CPU if GPU idle.\n");
test_pt_update(m, pt, test, false);
kunit_info(test, "Testing page table update using GPU\n");
test_pt_update(m, pt, test, true);
out:
xe_bb_free(bb, NULL);
free_tiny:
xe_bo_unpin(tiny);
xe_bo_put(tiny);
free_pt:
xe_bo_unpin(pt);
xe_bo_put(pt);
free_big:
xe_bo_unpin(big);
xe_bo_put(big);
vunmap:
xe_bo_vunmap(m->pt_bo);
}
static int migrate_test_run_device(struct xe_device *xe)
{
struct kunit *test = xe_cur_kunit();
struct xe_gt *gt;
int id;
for_each_gt(gt, xe, id) {
struct xe_migrate *m = gt->migrate;
struct ww_acquire_ctx ww;
kunit_info(test, "Testing gt id %d.\n", id);
xe_vm_lock(m->eng->vm, &ww, 0, true);
xe_device_mem_access_get(xe);
xe_migrate_sanity_test(m, test);
xe_device_mem_access_put(xe);
xe_vm_unlock(m->eng->vm, &ww);
}
return 0;
}
void xe_migrate_sanity_kunit(struct kunit *test)
{
xe_call_for_each_device(migrate_test_run_device);
}
EXPORT_SYMBOL(xe_migrate_sanity_kunit);
|