[PATCH 15/25] drm/i915: Ensure gem_contexts selftests work with unbind changes.
Maarten Lankhorst
maarten.lankhorst at linux.intel.com
Mon Oct 4 07:30:07 UTC 2021
In the next commit, we don't evict when refcount = 0.
Instead of adding evictions everywhere in this test,
give each subtest its own clean VM, so lack of cleanup will not
affect other tests. This only requires a convenience function to
create a gem context, which can be duplicated where needed.
As an additional benefit, we can use i915_live_subtests(), which
does some setup and teardown preparations between each subtest.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
.../gpu/drm/i915/gem/selftests/huge_pages.c | 125 +++++++++++-------
.../drm/i915/gem/selftests/i915_gem_context.c | 54 +++++---
2 files changed, 109 insertions(+), 70 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
index 2a99052b638e..3c952ce5c5fc 100644
--- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
+++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
@@ -22,6 +22,21 @@
#include "selftests/mock_region.h"
#include "selftests/i915_random.h"
+struct i915_gem_context *hugepage_ctx(struct drm_i915_private *i915, struct file *file)
+{
+ struct i915_gem_context *ctx = live_context(i915, file);
+ struct i915_address_space *vm;
+
+ if (IS_ERR(ctx))
+ return ctx;
+
+ vm = ctx->vm;
+ if (vm)
+ WRITE_ONCE(vm->scrub_64K, true);
+
+ return ctx;
+}
+
static const unsigned int page_sizes[] = {
I915_GTT_PAGE_SIZE_2M,
I915_GTT_PAGE_SIZE_64K,
@@ -1077,10 +1092,6 @@ static int __igt_write_huge(struct intel_context *ce,
if (IS_ERR(vma))
return PTR_ERR(vma);
- err = i915_vma_unbind(vma);
- if (err)
- return err;
-
err = i915_vma_pin(vma, size, 0, flags | offset);
if (err) {
/*
@@ -1114,7 +1125,7 @@ static int __igt_write_huge(struct intel_context *ce,
return err;
}
-static int igt_write_huge(struct i915_gem_context *ctx,
+static int igt_write_huge(struct drm_i915_private *i915,
struct drm_i915_gem_object *obj)
{
struct i915_gem_engines *engines;
@@ -1124,6 +1135,8 @@ static int igt_write_huge(struct i915_gem_context *ctx,
IGT_TIMEOUT(end_time);
unsigned int max_page_size;
unsigned int count;
+ struct i915_gem_context *ctx;
+ struct file *file;
u64 max;
u64 num;
u64 size;
@@ -1131,6 +1144,16 @@ static int igt_write_huge(struct i915_gem_context *ctx,
int i, n;
int err = 0;
+ file = mock_file(i915);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ ctx = hugepage_ctx(i915, file);
+ if (IS_ERR(ctx)) {
+ err = PTR_ERR(ctx);
+ goto out;
+ }
+
GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj));
size = obj->base.size;
@@ -1150,7 +1173,7 @@ static int igt_write_huge(struct i915_gem_context *ctx,
}
i915_gem_context_unlock_engines(ctx);
if (!n)
- return 0;
+ goto out;
/*
* To keep things interesting when alternating between engines in our
@@ -1212,6 +1235,8 @@ static int igt_write_huge(struct i915_gem_context *ctx,
kfree(order);
+out:
+ fput(file);
return err;
}
@@ -1274,8 +1299,7 @@ static u32 igt_random_size(struct rnd_state *prng,
static int igt_ppgtt_smoke_huge(void *arg)
{
- struct i915_gem_context *ctx = arg;
- struct drm_i915_private *i915 = ctx->i915;
+ struct drm_i915_private *i915 = arg;
struct drm_i915_gem_object *obj;
I915_RND_STATE(prng);
struct {
@@ -1299,6 +1323,7 @@ static int igt_ppgtt_smoke_huge(void *arg)
u32 min = backends[i].min;
u32 max = backends[i].max;
u32 size = max;
+
try_again:
size = igt_random_size(&prng, min, rounddown_pow_of_two(size));
@@ -1333,7 +1358,7 @@ static int igt_ppgtt_smoke_huge(void *arg)
goto out_unpin;
}
- err = igt_write_huge(ctx, obj);
+ err = igt_write_huge(i915, obj);
if (err) {
pr_err("%s write-huge failed with size=%u, i=%d\n",
__func__, size, i);
@@ -1352,7 +1377,6 @@ static int igt_ppgtt_smoke_huge(void *arg)
if (err)
break;
- i915_gem_drain_freed_objects(i915);
cond_resched();
}
@@ -1361,8 +1385,7 @@ static int igt_ppgtt_smoke_huge(void *arg)
static int igt_ppgtt_sanity_check(void *arg)
{
- struct i915_gem_context *ctx = arg;
- struct drm_i915_private *i915 = ctx->i915;
+ struct drm_i915_private *i915 = arg;
unsigned int supported = INTEL_INFO(i915)->page_sizes;
struct {
igt_create_fn fn;
@@ -1429,7 +1452,7 @@ static int igt_ppgtt_sanity_check(void *arg)
if (pages)
obj->mm.page_sizes.sg = pages;
- err = igt_write_huge(ctx, obj);
+ err = igt_write_huge(i915, obj);
i915_gem_object_lock(obj, NULL);
i915_gem_object_unpin_pages(obj);
@@ -1456,15 +1479,27 @@ static int igt_ppgtt_sanity_check(void *arg)
static int igt_tmpfs_fallback(void *arg)
{
- struct i915_gem_context *ctx = arg;
- struct drm_i915_private *i915 = ctx->i915;
+ struct drm_i915_private *i915 = arg;
+ struct i915_address_space *vm;
+ struct i915_gem_context *ctx;
struct vfsmount *gemfs = i915->mm.gemfs;
- struct i915_address_space *vm = i915_gem_context_get_eb_vm(ctx);
struct drm_i915_gem_object *obj;
struct i915_vma *vma;
+ struct file *file;
u32 *vaddr;
int err = 0;
+ file = mock_file(i915);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ ctx = hugepage_ctx(i915, file);
+ if (IS_ERR(ctx)) {
+ err = PTR_ERR(ctx);
+ goto out;
+ }
+ vm = i915_gem_context_get_eb_vm(ctx);
+
/*
* Make sure that we don't burst into a ball of flames upon falling back
* to tmpfs, which we rely on if on the off-chance we encouter a failure
@@ -1508,33 +1543,47 @@ static int igt_tmpfs_fallback(void *arg)
i915->mm.gemfs = gemfs;
i915_vm_put(vm);
+out:
+ fput(file);
return err;
}
static int igt_shrink_thp(void *arg)
{
- struct i915_gem_context *ctx = arg;
- struct drm_i915_private *i915 = ctx->i915;
- struct i915_address_space *vm = i915_gem_context_get_eb_vm(ctx);
+ struct drm_i915_private *i915 = arg;
+ struct i915_address_space *vm;
+ struct i915_gem_context *ctx;
struct drm_i915_gem_object *obj;
struct i915_gem_engines_iter it;
struct intel_context *ce;
struct i915_vma *vma;
+ struct file *file;
unsigned int flags = PIN_USER;
unsigned int n;
bool should_swap;
- int err = 0;
+ int err;
+
+ if (!igt_can_allocate_thp(i915)) {
+ pr_info("missing THP support, skipping\n");
+ return 0;
+ }
+
+ file = mock_file(i915);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ ctx = hugepage_ctx(i915, file);
+ if (IS_ERR(ctx)) {
+ err = PTR_ERR(ctx);
+ goto out;
+ }
+ vm = i915_gem_context_get_eb_vm(ctx);
/*
* Sanity check shrinking huge-paged object -- make sure nothing blows
* up.
*/
- if (!igt_can_allocate_thp(i915)) {
- pr_info("missing THP support, skipping\n");
- goto out_vm;
- }
-
obj = i915_gem_object_create_shmem(i915, SZ_2M);
if (IS_ERR(obj)) {
err = PTR_ERR(obj);
@@ -1624,7 +1673,8 @@ static int igt_shrink_thp(void *arg)
i915_gem_object_put(obj);
out_vm:
i915_vm_put(vm);
-
+out:
+ fput(file);
return err;
}
@@ -1685,9 +1735,6 @@ int i915_gem_huge_page_live_selftests(struct drm_i915_private *i915)
SUBTEST(igt_ppgtt_smoke_huge),
SUBTEST(igt_ppgtt_sanity_check),
};
- struct i915_gem_context *ctx;
- struct i915_address_space *vm;
- struct file *file;
int err;
if (!HAS_PPGTT(i915)) {
@@ -1698,23 +1745,5 @@ int i915_gem_huge_page_live_selftests(struct drm_i915_private *i915)
if (intel_gt_is_wedged(&i915->gt))
return 0;
- 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_file;
- }
-
- vm = ctx->vm;
- if (vm)
- WRITE_ONCE(vm->scrub_64K, true);
-
- err = i915_subtests(tests, ctx);
-
-out_file:
- fput(file);
- return err;
+ return i915_live_subtests(tests, i915);
}
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index b32f7fed2d9c..3fc595b57cf4 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -1481,10 +1481,10 @@ static int check_scratch(struct i915_address_space *vm, u64 offset)
static int write_to_scratch(struct i915_gem_context *ctx,
struct intel_engine_cs *engine,
+ struct drm_i915_gem_object *obj,
u64 offset, u32 value)
{
struct drm_i915_private *i915 = ctx->i915;
- struct drm_i915_gem_object *obj;
struct i915_address_space *vm;
struct i915_request *rq;
struct i915_vma *vma;
@@ -1497,15 +1497,9 @@ static int write_to_scratch(struct i915_gem_context *ctx,
if (err)
return err;
- obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
- if (IS_ERR(obj))
- return PTR_ERR(obj);
-
cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
- if (IS_ERR(cmd)) {
- err = PTR_ERR(cmd);
- goto out;
- }
+ if (IS_ERR(cmd))
+ return PTR_ERR(cmd);
*cmd++ = MI_STORE_DWORD_IMM_GEN4;
if (GRAPHICS_VER(i915) >= 8) {
@@ -1569,17 +1563,19 @@ static int write_to_scratch(struct i915_gem_context *ctx,
i915_vma_unpin(vma);
out_vm:
i915_vm_put(vm);
-out:
- i915_gem_object_put(obj);
+
+ if (!err)
+ err = i915_gem_object_wait(obj, 0, MAX_SCHEDULE_TIMEOUT);
+
return err;
}
static int read_from_scratch(struct i915_gem_context *ctx,
struct intel_engine_cs *engine,
+ struct drm_i915_gem_object *obj,
u64 offset, u32 *value)
{
struct drm_i915_private *i915 = ctx->i915;
- struct drm_i915_gem_object *obj;
struct i915_address_space *vm;
const u32 result = 0x100;
struct i915_request *rq;
@@ -1594,10 +1590,6 @@ static int read_from_scratch(struct i915_gem_context *ctx,
if (err)
return err;
- obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
- if (IS_ERR(obj))
- return PTR_ERR(obj);
-
if (GRAPHICS_VER(i915) >= 8) {
const u32 GPR0 = engine->mmio_base + 0x600;
@@ -1615,7 +1607,7 @@ static int read_from_scratch(struct i915_gem_context *ctx,
cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
if (IS_ERR(cmd)) {
err = PTR_ERR(cmd);
- goto out;
+ goto err_unpin;
}
memset(cmd, POISON_INUSE, PAGE_SIZE);
@@ -1651,7 +1643,7 @@ static int read_from_scratch(struct i915_gem_context *ctx,
cmd = i915_gem_object_pin_map_unlocked(obj, I915_MAP_WB);
if (IS_ERR(cmd)) {
err = PTR_ERR(cmd);
- goto out;
+ goto err_unpin;
}
memset(cmd, POISON_INUSE, PAGE_SIZE);
@@ -1722,8 +1714,10 @@ static int read_from_scratch(struct i915_gem_context *ctx,
i915_vma_unpin(vma);
out_vm:
i915_vm_put(vm);
-out:
- i915_gem_object_put(obj);
+
+ if (!err)
+ err = i915_gem_object_wait(obj, 0, MAX_SCHEDULE_TIMEOUT);
+
return err;
}
@@ -1765,6 +1759,7 @@ static int igt_vm_isolation(void *arg)
u64 vm_total;
u32 expected;
int err;
+ struct drm_i915_gem_object *obj_a, *obj_b;
if (GRAPHICS_VER(i915) < 7)
return 0;
@@ -1810,6 +1805,18 @@ static int igt_vm_isolation(void *arg)
vm_total = ctx_a->vm->total;
GEM_BUG_ON(ctx_b->vm->total != vm_total);
+ obj_a = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(obj_a)) {
+ err = PTR_ERR(obj_a);
+ goto out_file;
+ }
+
+ obj_b = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(obj_b)) {
+ err = PTR_ERR(obj_b);
+ goto put_a;
+ }
+
count = 0;
num_engines = 0;
for_each_uabi_engine(engine, i915) {
@@ -1832,10 +1839,10 @@ static int igt_vm_isolation(void *arg)
I915_GTT_PAGE_SIZE, vm_total,
sizeof(u32), alignof_dword);
- err = write_to_scratch(ctx_a, engine,
+ err = write_to_scratch(ctx_a, engine, obj_a,
offset, 0xdeadbeef);
if (err == 0)
- err = read_from_scratch(ctx_b, engine,
+ err = read_from_scratch(ctx_b, engine, obj_b,
offset, &value);
if (err)
goto out_file;
@@ -1858,6 +1865,9 @@ static int igt_vm_isolation(void *arg)
pr_info("Checked %lu scratch offsets across %lu engines\n",
count, num_engines);
+ i915_gem_object_put(obj_b);
+put_a:
+ i915_gem_object_put(obj_a);
out_file:
if (igt_live_test_end(&t))
err = -EIO;
--
2.33.0
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