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path: root/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
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Diffstat (limited to 'drivers/gpu/drm/i915/selftests/i915_gem_gtt.c')
-rw-r--r--drivers/gpu/drm/i915/selftests/i915_gem_gtt.c505
1 files changed, 413 insertions, 92 deletions
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
index 1a60b9fe8221..b342bef5e7c9 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
@@ -25,26 +25,21 @@
#include <linux/list_sort.h>
#include <linux/prime_numbers.h>
+#include "gem/i915_gem_context.h"
#include "gem/selftests/mock_context.h"
+#include "gt/intel_context.h"
#include "i915_random.h"
#include "i915_selftest.h"
#include "mock_drm.h"
#include "mock_gem_device.h"
+#include "mock_gtt.h"
+#include "igt_flush_test.h"
static void cleanup_freed_objects(struct drm_i915_private *i915)
{
- /*
- * As we may hold onto the struct_mutex for inordinate lengths of
- * time, the NMI khungtaskd detector may fire for the free objects
- * worker.
- */
- mutex_unlock(&i915->drm.struct_mutex);
-
i915_gem_drain_freed_objects(i915);
-
- mutex_lock(&i915->drm.struct_mutex);
}
static void fake_free_pages(struct drm_i915_gem_object *obj,
@@ -88,8 +83,6 @@ static int fake_get_pages(struct drm_i915_gem_object *obj)
}
GEM_BUG_ON(rem);
- obj->mm.madv = I915_MADV_DONTNEED;
-
__i915_gem_object_set_pages(obj, pages, sg_page_sizes);
return 0;
@@ -101,7 +94,6 @@ static void fake_put_pages(struct drm_i915_gem_object *obj,
{
fake_free_pages(obj, pages);
obj->mm.dirty = false;
- obj->mm.madv = I915_MADV_WILLNEED;
}
static const struct drm_i915_gem_object_ops fake_ops = {
@@ -113,6 +105,7 @@ static const struct drm_i915_gem_object_ops fake_ops = {
static struct drm_i915_gem_object *
fake_dma_object(struct drm_i915_private *i915, u64 size)
{
+ static struct lock_class_key lock_class;
struct drm_i915_gem_object *obj;
GEM_BUG_ON(!size);
@@ -126,7 +119,9 @@ fake_dma_object(struct drm_i915_private *i915, u64 size)
goto err;
drm_gem_private_object_init(&i915->drm, &obj->base, size);
- i915_gem_object_init(obj, &fake_ops);
+ i915_gem_object_init(obj, &fake_ops, &lock_class);
+
+ i915_gem_object_set_volatile(obj);
obj->write_domain = I915_GEM_DOMAIN_CPU;
obj->read_domains = I915_GEM_DOMAIN_CPU;
@@ -157,7 +152,7 @@ static int igt_ppgtt_alloc(void *arg)
if (!HAS_PPGTT(dev_priv))
return 0;
- ppgtt = __ppgtt_create(dev_priv);
+ ppgtt = i915_ppgtt_create(&dev_priv->gt);
if (IS_ERR(ppgtt))
return PTR_ERR(ppgtt);
@@ -208,22 +203,21 @@ static int igt_ppgtt_alloc(void *arg)
}
err_ppgtt_cleanup:
- mutex_lock(&dev_priv->drm.struct_mutex);
i915_vm_put(&ppgtt->vm);
- mutex_unlock(&dev_priv->drm.struct_mutex);
return err;
}
-static int lowlevel_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int lowlevel_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
I915_RND_STATE(seed_prng);
+ struct i915_vma *mock_vma;
unsigned int size;
- struct i915_vma mock_vma;
- memset(&mock_vma, 0, sizeof(struct i915_vma));
+ mock_vma = kzalloc(sizeof(*mock_vma), GFP_KERNEL);
+ if (!mock_vma)
+ return -ENOMEM;
/* Keep creating larger objects until one cannot fit into the hole */
for (size = 12; (hole_end - hole_start) >> size; size++) {
@@ -247,8 +241,10 @@ static int lowlevel_hole(struct drm_i915_private *i915,
if (order)
break;
} while (count >>= 1);
- if (!count)
+ if (!count) {
+ kfree(mock_vma);
return -ENOMEM;
+ }
GEM_BUG_ON(!order);
GEM_BUG_ON(count * BIT_ULL(size) > vm->total);
@@ -260,7 +256,7 @@ static int lowlevel_hole(struct drm_i915_private *i915,
* memory. We expect to hit -ENOMEM.
*/
- obj = fake_dma_object(i915, BIT_ULL(size));
+ obj = fake_dma_object(vm->i915, BIT_ULL(size));
if (IS_ERR(obj)) {
kfree(order);
break;
@@ -291,22 +287,24 @@ static int lowlevel_hole(struct drm_i915_private *i915,
vm->allocate_va_range(vm, addr, BIT_ULL(size)))
break;
- mock_vma.pages = obj->mm.pages;
- mock_vma.node.size = BIT_ULL(size);
- mock_vma.node.start = addr;
+ mock_vma->pages = obj->mm.pages;
+ mock_vma->node.size = BIT_ULL(size);
+ mock_vma->node.start = addr;
- wakeref = intel_runtime_pm_get(&i915->runtime_pm);
- vm->insert_entries(vm, &mock_vma, I915_CACHE_NONE, 0);
- intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+ with_intel_runtime_pm(vm->gt->uncore->rpm, wakeref)
+ vm->insert_entries(vm, mock_vma,
+ I915_CACHE_NONE, 0);
}
count = n;
i915_random_reorder(order, count, &prng);
for (n = 0; n < count; n++) {
u64 addr = hole_start + order[n] * BIT_ULL(size);
+ intel_wakeref_t wakeref;
GEM_BUG_ON(addr + BIT_ULL(size) > vm->total);
- vm->clear_range(vm, addr, BIT_ULL(size));
+ with_intel_runtime_pm(vm->gt->uncore->rpm, wakeref)
+ vm->clear_range(vm, addr, BIT_ULL(size));
}
i915_gem_object_unpin_pages(obj);
@@ -314,9 +312,10 @@ static int lowlevel_hole(struct drm_i915_private *i915,
kfree(order);
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
+ kfree(mock_vma);
return 0;
}
@@ -341,8 +340,7 @@ static void close_object_list(struct list_head *objects,
}
}
-static int fill_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int fill_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
@@ -375,7 +373,7 @@ static int fill_hole(struct drm_i915_private *i915,
{ }
}, *p;
- obj = fake_dma_object(i915, full_size);
+ obj = fake_dma_object(vm->i915, full_size);
if (IS_ERR(obj))
break;
@@ -543,7 +541,7 @@ static int fill_hole(struct drm_i915_private *i915,
}
close_object_list(&objects, vm);
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
return 0;
@@ -553,8 +551,7 @@ err:
return err;
}
-static int walk_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int walk_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
@@ -576,7 +573,7 @@ static int walk_hole(struct drm_i915_private *i915,
u64 addr;
int err = 0;
- obj = fake_dma_object(i915, size << PAGE_SHIFT);
+ obj = fake_dma_object(vm->i915, size << PAGE_SHIFT);
if (IS_ERR(obj))
break;
@@ -631,14 +628,13 @@ err_put:
if (err)
return err;
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
return 0;
}
-static int pot_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int pot_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
@@ -652,7 +648,7 @@ static int pot_hole(struct drm_i915_private *i915,
if (i915_is_ggtt(vm))
flags |= PIN_GLOBAL;
- obj = i915_gem_object_create_internal(i915, 2 * I915_GTT_PAGE_SIZE);
+ obj = i915_gem_object_create_internal(vm->i915, 2 * I915_GTT_PAGE_SIZE);
if (IS_ERR(obj))
return PTR_ERR(obj);
@@ -713,8 +709,7 @@ err_obj:
return err;
}
-static int drunk_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int drunk_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
@@ -759,7 +754,7 @@ static int drunk_hole(struct drm_i915_private *i915,
* memory. We expect to hit -ENOMEM.
*/
- obj = fake_dma_object(i915, BIT_ULL(size));
+ obj = fake_dma_object(vm->i915, BIT_ULL(size));
if (IS_ERR(obj)) {
kfree(order);
break;
@@ -817,14 +812,13 @@ err_obj:
if (err)
return err;
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
return 0;
}
-static int __shrink_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int __shrink_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
@@ -841,7 +835,7 @@ static int __shrink_hole(struct drm_i915_private *i915,
u64 size = BIT_ULL(order++);
size = min(size, hole_end - addr);
- obj = fake_dma_object(i915, size);
+ obj = fake_dma_object(vm->i915, size);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
break;
@@ -877,6 +871,15 @@ static int __shrink_hole(struct drm_i915_private *i915,
i915_vma_unpin(vma);
addr += size;
+ /*
+ * Since we are injecting allocation faults at random intervals,
+ * wait for this allocation to complete before we change the
+ * faultinjection.
+ */
+ err = i915_vma_sync(vma);
+ if (err)
+ break;
+
if (igt_timeout(end_time,
"%s timed out at ofset %llx [%llx - %llx]\n",
__func__, addr, hole_start, hole_end)) {
@@ -886,12 +889,11 @@ static int __shrink_hole(struct drm_i915_private *i915,
}
close_object_list(&objects, vm);
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
return err;
}
-static int shrink_hole(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int shrink_hole(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
@@ -903,7 +905,7 @@ static int shrink_hole(struct drm_i915_private *i915,
for_each_prime_number_from(prime, 0, ULONG_MAX - 1) {
vm->fault_attr.interval = prime;
- err = __shrink_hole(i915, vm, hole_start, hole_end, end_time);
+ err = __shrink_hole(vm, hole_start, hole_end, end_time);
if (err)
break;
}
@@ -913,8 +915,7 @@ static int shrink_hole(struct drm_i915_private *i915,
return err;
}
-static int shrink_boom(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+static int shrink_boom(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time)
{
@@ -936,7 +937,7 @@ static int shrink_boom(struct drm_i915_private *i915,
unsigned int size = sizes[i];
struct i915_vma *vma;
- purge = fake_dma_object(i915, size);
+ purge = fake_dma_object(vm->i915, size);
if (IS_ERR(purge))
return PTR_ERR(purge);
@@ -953,7 +954,7 @@ static int shrink_boom(struct drm_i915_private *i915,
/* Should now be ripe for purging */
i915_vma_unpin(vma);
- explode = fake_dma_object(i915, size);
+ explode = fake_dma_object(vm->i915, size);
if (IS_ERR(explode)) {
err = PTR_ERR(explode);
goto err_purge;
@@ -979,7 +980,7 @@ static int shrink_boom(struct drm_i915_private *i915,
i915_gem_object_put(explode);
memset(&vm->fault_attr, 0, sizeof(vm->fault_attr));
- cleanup_freed_objects(i915);
+ cleanup_freed_objects(vm->i915);
}
return 0;
@@ -993,14 +994,13 @@ err_purge:
}
static int exercise_ppgtt(struct drm_i915_private *dev_priv,
- int (*func)(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+ int (*func)(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
- struct drm_file *file;
struct i915_ppgtt *ppgtt;
IGT_TIMEOUT(end_time);
+ struct file *file;
int err;
if (!HAS_FULL_PPGTT(dev_priv))
@@ -1010,22 +1010,20 @@ static int exercise_ppgtt(struct drm_i915_private *dev_priv,
if (IS_ERR(file))
return PTR_ERR(file);
- mutex_lock(&dev_priv->drm.struct_mutex);
- ppgtt = i915_ppgtt_create(dev_priv);
+ ppgtt = i915_ppgtt_create(&dev_priv->gt);
if (IS_ERR(ppgtt)) {
err = PTR_ERR(ppgtt);
- goto out_unlock;
+ goto out_free;
}
GEM_BUG_ON(offset_in_page(ppgtt->vm.total));
- GEM_BUG_ON(ppgtt->vm.closed);
+ GEM_BUG_ON(!atomic_read(&ppgtt->vm.open));
- err = func(dev_priv, &ppgtt->vm, 0, ppgtt->vm.total, end_time);
+ err = func(&ppgtt->vm, 0, ppgtt->vm.total, end_time);
i915_vm_put(&ppgtt->vm);
-out_unlock:
- mutex_unlock(&dev_priv->drm.struct_mutex);
- mock_file_free(dev_priv, file);
+out_free:
+ fput(file);
return err;
}
@@ -1076,8 +1074,7 @@ static int sort_holes(void *priv, struct list_head *A, struct list_head *B)
}
static int exercise_ggtt(struct drm_i915_private *i915,
- int (*func)(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+ int (*func)(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
@@ -1087,7 +1084,6 @@ static int exercise_ggtt(struct drm_i915_private *i915,
IGT_TIMEOUT(end_time);
int err = 0;
- mutex_lock(&i915->drm.struct_mutex);
restart:
list_sort(NULL, &ggtt->vm.mm.hole_stack, sort_holes);
drm_mm_for_each_hole(node, &ggtt->vm.mm, hole_start, hole_end) {
@@ -1100,7 +1096,7 @@ restart:
if (hole_start >= hole_end)
continue;
- err = func(i915, &ggtt->vm, hole_start, hole_end, end_time);
+ err = func(&ggtt->vm, hole_start, hole_end, end_time);
if (err)
break;
@@ -1108,7 +1104,6 @@ restart:
last = hole_end;
goto restart;
}
- mutex_unlock(&i915->drm.struct_mutex);
return err;
}
@@ -1150,24 +1145,25 @@ static int igt_ggtt_page(void *arg)
unsigned int *order, n;
int err;
- mutex_lock(&i915->drm.struct_mutex);
+ if (!i915_ggtt_has_aperture(ggtt))
+ return 0;
obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
- if (IS_ERR(obj)) {
- err = PTR_ERR(obj);
- goto out_unlock;
- }
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
err = i915_gem_object_pin_pages(obj);
if (err)
goto out_free;
memset(&tmp, 0, sizeof(tmp));
+ mutex_lock(&ggtt->vm.mutex);
err = drm_mm_insert_node_in_range(&ggtt->vm.mm, &tmp,
count * PAGE_SIZE, 0,
I915_COLOR_UNEVICTABLE,
0, ggtt->mappable_end,
DRM_MM_INSERT_LOW);
+ mutex_unlock(&ggtt->vm.mutex);
if (err)
goto out_unpin;
@@ -1195,7 +1191,7 @@ static int igt_ggtt_page(void *arg)
iowrite32(n, vaddr + n);
io_mapping_unmap_atomic(vaddr);
}
- i915_gem_flush_ggtt_writes(i915);
+ intel_gt_flush_ggtt_writes(ggtt->vm.gt);
i915_random_reorder(order, count, &prng);
for (n = 0; n < count; n++) {
@@ -1219,13 +1215,13 @@ static int igt_ggtt_page(void *arg)
out_remove:
ggtt->vm.clear_range(&ggtt->vm, tmp.start, tmp.size);
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+ mutex_lock(&ggtt->vm.mutex);
drm_mm_remove_node(&tmp);
+ mutex_unlock(&ggtt->vm.mutex);
out_unpin:
i915_gem_object_unpin_pages(obj);
out_free:
i915_gem_object_put(obj);
-out_unlock:
- mutex_unlock(&i915->drm.struct_mutex);
return err;
}
@@ -1236,20 +1232,23 @@ static void track_vma_bind(struct i915_vma *vma)
atomic_inc(&obj->bind_count); /* track for eviction later */
__i915_gem_object_pin_pages(obj);
+ GEM_BUG_ON(vma->pages);
+ atomic_set(&vma->pages_count, I915_VMA_PAGES_ACTIVE);
+ __i915_gem_object_pin_pages(obj);
vma->pages = obj->mm.pages;
mutex_lock(&vma->vm->mutex);
- list_move_tail(&vma->vm_link, &vma->vm->bound_list);
+ list_add_tail(&vma->vm_link, &vma->vm->bound_list);
mutex_unlock(&vma->vm->mutex);
}
static int exercise_mock(struct drm_i915_private *i915,
- int (*func)(struct drm_i915_private *i915,
- struct i915_address_space *vm,
+ int (*func)(struct i915_address_space *vm,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
const u64 limit = totalram_pages() << PAGE_SHIFT;
+ struct i915_address_space *vm;
struct i915_gem_context *ctx;
IGT_TIMEOUT(end_time);
int err;
@@ -1258,7 +1257,9 @@ static int exercise_mock(struct drm_i915_private *i915,
if (!ctx)
return -ENOMEM;
- err = func(i915, ctx->vm, 0, min(ctx->vm->total, limit), end_time);
+ vm = i915_gem_context_get_vm_rcu(ctx);
+ err = func(vm, 0, min(vm->total, limit), end_time);
+ i915_vm_put(vm);
mock_context_close(ctx);
return err;
@@ -1296,6 +1297,7 @@ static int igt_gtt_reserve(void *arg)
{
struct i915_ggtt *ggtt = arg;
struct drm_i915_gem_object *obj, *on;
+ I915_RND_STATE(prng);
LIST_HEAD(objects);
u64 total;
int err = -ENODEV;
@@ -1332,11 +1334,13 @@ static int igt_gtt_reserve(void *arg)
goto out;
}
+ mutex_lock(&ggtt->vm.mutex);
err = i915_gem_gtt_reserve(&ggtt->vm, &vma->node,
obj->base.size,
total,
obj->cache_level,
0);
+ mutex_unlock(&ggtt->vm.mutex);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 1) failed at %llu/%llu with err=%d\n",
total, ggtt->vm.total, err);
@@ -1382,11 +1386,13 @@ static int igt_gtt_reserve(void *arg)
goto out;
}
+ mutex_lock(&ggtt->vm.mutex);
err = i915_gem_gtt_reserve(&ggtt->vm, &vma->node,
obj->base.size,
total,
obj->cache_level,
0);
+ mutex_unlock(&ggtt->vm.mutex);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 2) failed at %llu/%llu with err=%d\n",
total, ggtt->vm.total, err);
@@ -1422,15 +1428,18 @@ static int igt_gtt_reserve(void *arg)
goto out;
}
- offset = random_offset(0, ggtt->vm.total,
- 2*I915_GTT_PAGE_SIZE,
- I915_GTT_MIN_ALIGNMENT);
+ offset = igt_random_offset(&prng,
+ 0, ggtt->vm.total,
+ 2 * I915_GTT_PAGE_SIZE,
+ I915_GTT_MIN_ALIGNMENT);
+ mutex_lock(&ggtt->vm.mutex);
err = i915_gem_gtt_reserve(&ggtt->vm, &vma->node,
obj->base.size,
offset,
obj->cache_level,
0);
+ mutex_unlock(&ggtt->vm.mutex);
if (err) {
pr_err("i915_gem_gtt_reserve (pass 3) failed at %llu/%llu with err=%d\n",
total, ggtt->vm.total, err);
@@ -1499,11 +1508,13 @@ static int igt_gtt_insert(void *arg)
/* Check a couple of obviously invalid requests */
for (ii = invalid_insert; ii->size; ii++) {
+ mutex_lock(&ggtt->vm.mutex);
err = i915_gem_gtt_insert(&ggtt->vm, &tmp,
ii->size, ii->alignment,
I915_COLOR_UNEVICTABLE,
ii->start, ii->end,
0);
+ mutex_unlock(&ggtt->vm.mutex);
if (err != -ENOSPC) {
pr_err("Invalid i915_gem_gtt_insert(.size=%llx, .alignment=%llx, .start=%llx, .end=%llx) succeeded (err=%d)\n",
ii->size, ii->alignment, ii->start, ii->end,
@@ -1539,10 +1550,12 @@ static int igt_gtt_insert(void *arg)
goto out;
}
+ mutex_lock(&ggtt->vm.mutex);
err = i915_gem_gtt_insert(&ggtt->vm, &vma->node,
obj->base.size, 0, obj->cache_level,
0, ggtt->vm.total,
0);
+ mutex_unlock(&ggtt->vm.mutex);
if (err == -ENOSPC) {
/* maxed out the GGTT space */
i915_gem_object_put(obj);
@@ -1597,10 +1610,12 @@ static int igt_gtt_insert(void *arg)
goto out;
}
+ mutex_lock(&ggtt->vm.mutex);
err = i915_gem_gtt_insert(&ggtt->vm, &vma->node,
obj->base.size, 0, obj->cache_level,
0, ggtt->vm.total,
0);
+ mutex_unlock(&ggtt->vm.mutex);
if (err) {
pr_err("i915_gem_gtt_insert (pass 2) failed at %llu/%llu with err=%d\n",
total, ggtt->vm.total, err);
@@ -1644,10 +1659,12 @@ static int igt_gtt_insert(void *arg)
goto out;
}
+ mutex_lock(&ggtt->vm.mutex);
err = i915_gem_gtt_insert(&ggtt->vm, &vma->node,
obj->base.size, 0, obj->cache_level,
0, ggtt->vm.total,
0);
+ mutex_unlock(&ggtt->vm.mutex);
if (err) {
pr_err("i915_gem_gtt_insert (pass 3) failed at %llu/%llu with err=%d\n",
total, ggtt->vm.total, err);
@@ -1691,13 +1708,10 @@ int i915_gem_gtt_mock_selftests(void)
}
mock_init_ggtt(i915, ggtt);
- mutex_lock(&i915->drm.struct_mutex);
err = i915_subtests(tests, ggtt);
- mock_device_flush(i915);
- mutex_unlock(&i915->drm.struct_mutex);
+ mock_device_flush(i915);
i915_gem_drain_freed_objects(i915);
-
mock_fini_ggtt(ggtt);
kfree(ggtt);
out_put:
@@ -1705,6 +1719,312 @@ out_put:
return err;
}
+static int context_sync(struct intel_context *ce)
+{
+ struct i915_request *rq;
+ long timeout;
+
+ rq = intel_context_create_request(ce);
+ if (IS_ERR(rq))
+ return PTR_ERR(rq);
+
+ i915_request_get(rq);
+ i915_request_add(rq);
+
+ timeout = i915_request_wait(rq, 0, HZ / 5);
+ i915_request_put(rq);
+
+ return timeout < 0 ? -EIO : 0;
+}
+
+static struct i915_request *
+submit_batch(struct intel_context *ce, u64 addr)
+{
+ struct i915_request *rq;
+ int err;
+
+ rq = intel_context_create_request(ce);
+ if (IS_ERR(rq))
+ return rq;
+
+ err = 0;
+ if (rq->engine->emit_init_breadcrumb) /* detect a hang */
+ err = rq->engine->emit_init_breadcrumb(rq);
+ if (err == 0)
+ err = rq->engine->emit_bb_start(rq, addr, 0, 0);
+
+ if (err == 0)
+ i915_request_get(rq);
+ i915_request_add(rq);
+
+ return err ? ERR_PTR(err) : rq;
+}
+
+static u32 *spinner(u32 *batch, int i)
+{
+ return batch + i * 64 / sizeof(*batch) + 4;
+}
+
+static void end_spin(u32 *batch, int i)
+{
+ *spinner(batch, i) = MI_BATCH_BUFFER_END;
+ wmb();
+}
+
+static int igt_cs_tlb(void *arg)
+{
+ const unsigned int count = PAGE_SIZE / 64;
+ const unsigned int chunk_size = count * PAGE_SIZE;
+ struct drm_i915_private *i915 = arg;
+ struct drm_i915_gem_object *bbe, *act, *out;
+ struct i915_gem_engines_iter it;
+ struct i915_address_space *vm;
+ struct i915_gem_context *ctx;
+ struct intel_context *ce;
+ struct i915_vma *vma;
+ I915_RND_STATE(prng);
+ struct file *file;
+ unsigned int i;
+ u32 *result;
+ u32 *batch;
+ int err = 0;
+
+ /*
+ * Our mission here is to fool the hardware to execute something
+ * from scratch as it has not seen the batch move (due to missing
+ * the TLB invalidate).
+ */
+
+ file = mock_file(i915);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ ctx = live_context(i915, file);
+ if (IS_ERR(ctx)) {
+ err = PTR_ERR(ctx);
+ goto out_unlock;
+ }
+
+ vm = i915_gem_context_get_vm_rcu(ctx);
+ if (i915_is_ggtt(vm))
+ goto out_vm;
+
+ /* Create two pages; dummy we prefill the TLB, and intended */
+ bbe = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(bbe)) {
+ err = PTR_ERR(bbe);
+ goto out_vm;
+ }
+
+ batch = i915_gem_object_pin_map(bbe, I915_MAP_WC);
+ if (IS_ERR(batch)) {
+ err = PTR_ERR(batch);
+ goto out_put_bbe;
+ }
+ memset32(batch, MI_BATCH_BUFFER_END, PAGE_SIZE / sizeof(u32));
+ i915_gem_object_flush_map(bbe);
+ i915_gem_object_unpin_map(bbe);
+
+ act = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(act)) {
+ err = PTR_ERR(act);
+ goto out_put_bbe;
+ }
+
+ /* Track the execution of each request by writing into different slot */
+ batch = i915_gem_object_pin_map(act, I915_MAP_WC);
+ if (IS_ERR(batch)) {
+ err = PTR_ERR(batch);
+ goto out_put_act;
+ }
+ for (i = 0; i < count; i++) {
+ u32 *cs = batch + i * 64 / sizeof(*cs);
+ u64 addr = (vm->total - PAGE_SIZE) + i * sizeof(u32);
+
+ GEM_BUG_ON(INTEL_GEN(i915) < 6);
+ cs[0] = MI_STORE_DWORD_IMM_GEN4;
+ if (INTEL_GEN(i915) >= 8) {
+ cs[1] = lower_32_bits(addr);
+ cs[2] = upper_32_bits(addr);
+ cs[3] = i;
+ cs[4] = MI_NOOP;
+ cs[5] = MI_BATCH_BUFFER_START_GEN8;
+ } else {
+ cs[1] = 0;
+ cs[2] = lower_32_bits(addr);
+ cs[3] = i;
+ cs[4] = MI_NOOP;
+ cs[5] = MI_BATCH_BUFFER_START;
+ }
+ }
+
+ out = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(out)) {
+ err = PTR_ERR(out);
+ goto out_put_batch;
+ }
+ i915_gem_object_set_cache_coherency(out, I915_CACHING_CACHED);
+
+ vma = i915_vma_instance(out, vm, NULL);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto out_put_batch;
+ }
+
+ err = i915_vma_pin(vma, 0, 0,
+ PIN_USER |
+ PIN_OFFSET_FIXED |
+ (vm->total - PAGE_SIZE));
+ if (err)
+ goto out_put_out;
+ GEM_BUG_ON(vma->node.start != vm->total - PAGE_SIZE);
+
+ result = i915_gem_object_pin_map(out, I915_MAP_WB);
+ if (IS_ERR(result)) {
+ err = PTR_ERR(result);
+ goto out_put_out;
+ }
+
+ for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
+ IGT_TIMEOUT(end_time);
+ unsigned long pass = 0;
+
+ if (!intel_engine_can_store_dword(ce->engine))
+ continue;
+
+ while (!__igt_timeout(end_time, NULL)) {
+ struct i915_request *rq;
+ u64 offset;
+
+ offset = igt_random_offset(&prng,
+ 0, vm->total - PAGE_SIZE,
+ chunk_size, PAGE_SIZE);
+
+ err = vm->allocate_va_range(vm, offset, chunk_size);
+ if (err)
+ goto end;
+
+ memset32(result, STACK_MAGIC, PAGE_SIZE / sizeof(u32));
+
+ vma = i915_vma_instance(bbe, vm, NULL);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto end;
+ }
+
+ err = vma->ops->set_pages(vma);
+ if (err)
+ goto end;
+
+ /* Prime the TLB with the dummy pages */
+ for (i = 0; i < count; i++) {
+ vma->node.start = offset + i * PAGE_SIZE;
+ vm->insert_entries(vm, vma, I915_CACHE_NONE, 0);
+
+ rq = submit_batch(ce, vma->node.start);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto end;
+ }
+ i915_request_put(rq);
+ }
+
+ vma->ops->clear_pages(vma);
+
+ err = context_sync(ce);
+ if (err) {
+ pr_err("%s: dummy setup timed out\n",
+ ce->engine->name);
+ goto end;
+ }
+
+ vma = i915_vma_instance(act, vm, NULL);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto end;
+ }
+
+ err = vma->ops->set_pages(vma);
+ if (err)
+ goto end;
+
+ /* Replace the TLB with target batches */
+ for (i = 0; i < count; i++) {
+ struct i915_request *rq;
+ u32 *cs = batch + i * 64 / sizeof(*cs);
+ u64 addr;
+
+ vma->node.start = offset + i * PAGE_SIZE;
+ vm->insert_entries(vm, vma, I915_CACHE_NONE, 0);
+
+ addr = vma->node.start + i * 64;
+ cs[4] = MI_NOOP;
+ cs[6] = lower_32_bits(addr);
+ cs[7] = upper_32_bits(addr);
+ wmb();
+
+ rq = submit_batch(ce, addr);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto end;
+ }
+
+ /* Wait until the context chain has started */
+ if (i == 0) {
+ while (READ_ONCE(result[i]) &&
+ !i915_request_completed(rq))
+ cond_resched();
+ } else {
+ end_spin(batch, i - 1);
+ }
+
+ i915_request_put(rq);
+ }
+ end_spin(batch, count - 1);
+
+ vma->ops->clear_pages(vma);
+
+ err = context_sync(ce);
+ if (err) {
+ pr_err("%s: writes timed out\n",
+ ce->engine->name);
+ goto end;
+ }
+
+ for (i = 0; i < count; i++) {
+ if (result[i] != i) {
+ pr_err("%s: Write lost on pass %lu, at offset %llx, index %d, found %x, expected %x\n",
+ ce->engine->name, pass,
+ offset, i, result[i], i);
+ err = -EINVAL;
+ goto end;
+ }
+ }
+
+ vm->clear_range(vm, offset, chunk_size);
+ pass++;
+ }
+ }
+end:
+ if (igt_flush_test(i915))
+ err = -EIO;
+ i915_gem_context_unlock_engines(ctx);
+ i915_gem_object_unpin_map(out);
+out_put_out:
+ i915_gem_object_put(out);
+out_put_batch:
+ i915_gem_object_unpin_map(act);
+out_put_act:
+ i915_gem_object_put(act);
+out_put_bbe:
+ i915_gem_object_put(bbe);
+out_vm:
+ i915_vm_put(vm);
+out_unlock:
+ fput(file);
+ return err;
+}
+
int i915_gem_gtt_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
@@ -1722,6 +2042,7 @@ int i915_gem_gtt_live_selftests(struct drm_i915_private *i915)
SUBTEST(igt_ggtt_pot),
SUBTEST(igt_ggtt_fill),
SUBTEST(igt_ggtt_page),
+ SUBTEST(igt_cs_tlb),
};
GEM_BUG_ON(offset_in_page(i915->ggtt.vm.total));
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