1 files changed, 444 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/tests/xe_migrate.c b/drivers/gpu/drm/xe/tests/xe_migrate.c
new file mode 100644
index 000000000000..7a32faa2f688
--- /dev/null
+++ b/drivers/gpu/drm/xe/tests/xe_migrate.c
@@ -0,0 +1,444 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020-2022 Intel Corporation
+ */
+
+#include <kunit/test.h>
+#include <kunit/visibility.h>
+
+#include "tests/xe_migrate_test.h"
+#include "tests/xe_pci_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.has_usm);
+	struct xe_sched_job *job = xe_bb_create_migration_job(m->q, 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_tile *tile, 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(tile_to_xe(tile), 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, u32 region)
+{
+	struct xe_device *xe = tile_to_xe(m->tile);
+	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 *remote = xe_bo_create_locked(xe, m->tile, NULL,
+						   bo->size,
+						   ttm_bo_type_kernel,
+						   region |
+						   XE_BO_NEEDS_CPU_ACCESS);
+	if (IS_ERR(remote)) {
+		KUNIT_FAIL(test, "Failed to allocate remote bo for %s: %li\n",
+			   str, PTR_ERR(remote));
+		return;
+	}
+
+	err = xe_bo_validate(remote, 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(remote);
+	if (err) {
+		KUNIT_FAIL(test, "Failed to vmap system bo for %s: %li\n",
+			   str, err);
+		goto out_unlock;
+	}
+
+	xe_map_memset(xe, &remote->vmap, 0, 0xd0, remote->size);
+	fence = xe_migrate_clear(m, remote, remote->ttm.resource);
+	if (!sanity_fence_failed(xe, fence, big ? "Clearing remote big bo" :
+				 "Clearing remote small bo", test)) {
+		retval = xe_map_rd(xe, &remote->vmap, 0, u64);
+		check(retval, expected, "remote first offset should be cleared",
+		      test);
+		retval = xe_map_rd(xe, &remote->vmap, remote->size - 8, u64);
+		check(retval, expected, "remote last offset should be cleared",
+		      test);
+	}
+	dma_fence_put(fence);
+
+	/* Try to copy 0xc0 from remote to vram with 2MB or 64KiB/4KiB pages */
+	xe_map_memset(xe, &remote->vmap, 0, 0xc0, remote->size);
+	xe_map_memset(xe, &bo->vmap, 0, 0xd0, bo->size);
+
+	expected = 0xc0c0c0c0c0c0c0c0;
+	fence = xe_migrate_copy(m, remote, bo, remote->ttm.resource,
+				bo->ttm.resource, false);
+	if (!sanity_fence_failed(xe, fence, big ? "Copying big bo remote -> vram" :
+				 "Copying small bo remote -> vram", test)) {
+		retval = xe_map_rd(xe, &bo->vmap, 0, u64);
+		check(retval, expected,
+		      "remote -> vram bo first offset should be copied", test);
+		retval = xe_map_rd(xe, &bo->vmap, bo->size - 8, u64);
+		check(retval, expected,
+		      "remote -> vram bo offset should be copied", test);
+	}
+	dma_fence_put(fence);
+
+	/* And other way around.. slightly hacky.. */
+	xe_map_memset(xe, &remote->vmap, 0, 0xd0, remote->size);
+	xe_map_memset(xe, &bo->vmap, 0, 0xc0, bo->size);
+
+	fence = xe_migrate_copy(m, bo, remote, bo->ttm.resource,
+				remote->ttm.resource, false);
+	if (!sanity_fence_failed(xe, fence, big ? "Copying big bo vram -> remote" :
+				 "Copying small bo vram -> remote", test)) {
+		retval = xe_map_rd(xe, &remote->vmap, 0, u64);
+		check(retval, expected,
+		      "vram -> remote bo first offset should be copied", test);
+		retval = xe_map_rd(xe, &remote->vmap, bo->size - 8, u64);
+		check(retval, expected,
+		      "vram -> remote bo last offset should be copied", test);
+	}
+	dma_fence_put(fence);
+
+	xe_bo_vunmap(remote);
+out_unlock:
+	xe_bo_unlock(remote);
+	xe_bo_put(remote);
+}
+
+static void test_copy_sysmem(struct xe_migrate *m, struct xe_bo *bo,
+			     struct kunit *test)
+{
+	test_copy(m, bo, test, XE_BO_CREATE_SYSTEM_BIT);
+}
+
+static void test_copy_vram(struct xe_migrate *m, struct xe_bo *bo,
+			   struct kunit *test)
+{
+	u32 region;
+
+	if (bo->ttm.resource->mem_type == XE_PL_SYSTEM)
+		return;
+
+	if (bo->ttm.resource->mem_type == XE_PL_VRAM0)
+		region = XE_BO_CREATE_VRAM1_BIT;
+	else
+		region = XE_BO_CREATE_VRAM0_BIT;
+	test_copy(m, bo, test, region);
+}
+
+static void test_pt_update(struct xe_migrate *m, struct xe_bo *pt,
+			   struct kunit *test, bool force_gpu)
+{
+	struct xe_device *xe = tile_to_xe(m->tile);
+	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, m->q->vm, NULL, m->q, &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_tile *tile = m->tile;
+	struct xe_device *xe = tile_to_xe(tile);
+	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 = tile->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, tile, m->q->vm, SZ_4M,
+				   ttm_bo_type_kernel,
+				   XE_BO_CREATE_VRAM_IF_DGFX(tile) |
+				   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, tile, m->q->vm, XE_PAGE_SIZE,
+				  ttm_bo_type_kernel,
+				  XE_BO_CREATE_VRAM_IF_DGFX(tile) |
+				  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, tile, m->q->vm,
+				    2 * SZ_4K,
+				    ttm_bo_type_kernel,
+				    XE_BO_CREATE_VRAM_IF_DGFX(tile) |
+				    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(tile->primary_gt, 32, xe->info.has_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->q->vm->pt_root[id]->bo, XE_PAGE_SIZE),
+		   (unsigned long)xe_bo_main_addr(m->pt_bo, XE_PAGE_SIZE));
+
+	/* First part of the test, are we updating our pagetable bo with a new entry? */
+	xe_map_wr(xe, &bo->vmap, XE_PAGE_SIZE * (NUM_KERNEL_PDE - 1), u64,
+		  0xdeaddeadbeefbeef);
+	expected = m->q->vm->pt_ops->pte_encode_bo(pt, 0, xe->pat.idx[XE_CACHE_WB], 0);
+	if (m->q->vm->flags & XE_VM_FLAG_64K)
+		expected |= XE_PTE_PS64;
+	if (xe_bo_is_vram(pt))
+		xe_res_first(pt->ttm.resource, 0, pt->size, &src_it);
+	else
+		xe_res_first_sg(xe_bo_sg(pt), 0, pt->size, &src_it);
+
+	emit_pte(m, bb, NUM_KERNEL_PDE - 1, xe_bo_is_vram(pt), false,
+		 &src_it, XE_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, XE_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(tile->primary_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);
+
+	kunit_info(test, "Copying small buffer object to system\n");
+	test_copy_sysmem(m, tiny, test);
+	if (xe->info.tile_count > 1) {
+		kunit_info(test, "Copying small buffer object to other vram\n");
+		test_copy_vram(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);
+
+	kunit_info(test, "Copying big buffer object to system\n");
+	test_copy_sysmem(m, big, test);
+	if (xe->info.tile_count > 1) {
+		kunit_info(test, "Copying big buffer object to other vram\n");
+		test_copy_vram(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_tile *tile;
+	int id;
+
+	for_each_tile(tile, xe, id) {
+		struct xe_migrate *m = tile->migrate;
+
+		kunit_info(test, "Testing tile id %d.\n", id);
+		xe_vm_lock(m->q->vm, true);
+		xe_device_mem_access_get(xe);
+		xe_migrate_sanity_test(m, test);
+		xe_device_mem_access_put(xe);
+		xe_vm_unlock(m->q->vm);
+	}
+
+	return 0;
+}
+
+void xe_migrate_sanity_kunit(struct kunit *test)
+{
+	xe_call_for_each_device(migrate_test_run_device);
+}
+EXPORT_SYMBOL_IF_KUNIT(xe_migrate_sanity_kunit);