2 * SPDX-License-Identifier: MIT
4 * Copyright © 2018 Intel Corporation
7 #include <linux/random.h>
9 #include "gem/selftests/igt_gem_utils.h"
10 #include "gem/selftests/mock_context.h"
11 #include "gt/intel_gt.h"
12 #include "gt/intel_gt_pm.h"
14 #include "i915_selftest.h"
16 #include "igt_flush_test.h"
19 static int switch_to_context(struct i915_gem_context
*ctx
)
21 struct i915_gem_engines_iter it
;
22 struct intel_context
*ce
;
25 for_each_gem_engine(ce
, i915_gem_context_lock_engines(ctx
), it
) {
26 struct i915_request
*rq
;
28 rq
= intel_context_create_request(ce
);
36 i915_gem_context_unlock_engines(ctx
);
41 static void trash_stolen(struct drm_i915_private
*i915
)
43 struct i915_ggtt
*ggtt
= &i915
->ggtt
;
44 const u64 slot
= ggtt
->error_capture
.start
;
45 const resource_size_t size
= resource_size(&i915
->dsm
);
47 u32 prng
= 0x12345678;
49 /* XXX: fsck. needs some more thought... */
50 if (!i915_ggtt_has_aperture(ggtt
))
53 for (page
= 0; page
< size
; page
+= PAGE_SIZE
) {
54 const dma_addr_t dma
= i915
->dsm
.start
+ page
;
58 ggtt
->vm
.insert_page(&ggtt
->vm
, dma
, slot
, I915_CACHE_NONE
, 0);
60 s
= io_mapping_map_atomic_wc(&ggtt
->iomap
, slot
);
61 for (x
= 0; x
< PAGE_SIZE
/ sizeof(u32
); x
++) {
62 prng
= next_pseudo_random32(prng
);
63 iowrite32(prng
, &s
[x
]);
65 io_mapping_unmap_atomic(s
);
68 ggtt
->vm
.clear_range(&ggtt
->vm
, slot
, PAGE_SIZE
);
71 static void simulate_hibernate(struct drm_i915_private
*i915
)
73 intel_wakeref_t wakeref
;
75 wakeref
= intel_runtime_pm_get(&i915
->runtime_pm
);
78 * As a final sting in the tail, invalidate stolen. Under a real S4,
79 * stolen is lost and needs to be refilled on resume. However, under
80 * CI we merely do S4-device testing (as full S4 is too unreliable
81 * for automated testing across a cluster), so to simulate the effect
82 * of stolen being trashed across S4, we trash it ourselves.
86 intel_runtime_pm_put(&i915
->runtime_pm
, wakeref
);
89 static int pm_prepare(struct drm_i915_private
*i915
)
91 i915_gem_suspend(i915
);
96 static void pm_suspend(struct drm_i915_private
*i915
)
98 intel_wakeref_t wakeref
;
100 with_intel_runtime_pm(&i915
->runtime_pm
, wakeref
) {
101 i915_ggtt_suspend(&i915
->ggtt
);
102 i915_gem_suspend_late(i915
);
106 static void pm_hibernate(struct drm_i915_private
*i915
)
108 intel_wakeref_t wakeref
;
110 with_intel_runtime_pm(&i915
->runtime_pm
, wakeref
) {
111 i915_ggtt_suspend(&i915
->ggtt
);
113 i915_gem_freeze(i915
);
114 i915_gem_freeze_late(i915
);
118 static void pm_resume(struct drm_i915_private
*i915
)
120 intel_wakeref_t wakeref
;
123 * Both suspend and hibernate follow the same wakeup path and assume
124 * that runtime-pm just works.
126 with_intel_runtime_pm(&i915
->runtime_pm
, wakeref
) {
127 i915_ggtt_resume(&i915
->ggtt
);
128 i915_gem_resume(i915
);
132 static int igt_gem_suspend(void *arg
)
134 struct drm_i915_private
*i915
= arg
;
135 struct i915_gem_context
*ctx
;
139 file
= mock_file(i915
);
141 return PTR_ERR(file
);
144 ctx
= live_context(i915
, file
);
146 err
= switch_to_context(ctx
);
150 err
= pm_prepare(i915
);
156 /* Here be dragons! Note that with S3RST any S3 may become S4! */
157 simulate_hibernate(i915
);
161 err
= switch_to_context(ctx
);
167 static int igt_gem_hibernate(void *arg
)
169 struct drm_i915_private
*i915
= arg
;
170 struct i915_gem_context
*ctx
;
174 file
= mock_file(i915
);
176 return PTR_ERR(file
);
179 ctx
= live_context(i915
, file
);
181 err
= switch_to_context(ctx
);
185 err
= pm_prepare(i915
);
191 /* Here be dragons! */
192 simulate_hibernate(i915
);
196 err
= switch_to_context(ctx
);
202 static int igt_gem_ww_ctx(void *arg
)
204 struct drm_i915_private
*i915
= arg
;
205 struct drm_i915_gem_object
*obj
, *obj2
;
206 struct i915_gem_ww_ctx ww
;
209 obj
= i915_gem_object_create_internal(i915
, PAGE_SIZE
);
213 obj2
= i915_gem_object_create_internal(i915
, PAGE_SIZE
);
219 i915_gem_ww_ctx_init(&ww
, true);
221 /* Lock the objects, twice for good measure (-EALREADY handling) */
222 err
= i915_gem_object_lock(obj
, &ww
);
224 err
= i915_gem_object_lock_interruptible(obj
, &ww
);
226 err
= i915_gem_object_lock_interruptible(obj2
, &ww
);
228 err
= i915_gem_object_lock(obj2
, &ww
);
230 if (err
== -EDEADLK
) {
231 err
= i915_gem_ww_ctx_backoff(&ww
);
235 i915_gem_ww_ctx_fini(&ww
);
236 i915_gem_object_put(obj2
);
238 i915_gem_object_put(obj
);
242 int i915_gem_live_selftests(struct drm_i915_private
*i915
)
244 static const struct i915_subtest tests
[] = {
245 SUBTEST(igt_gem_suspend
),
246 SUBTEST(igt_gem_hibernate
),
247 SUBTEST(igt_gem_ww_ctx
),
250 if (intel_gt_is_wedged(&i915
->gt
))
253 return i915_live_subtests(tests
, i915
);