[Intel-gfx] [PATCH v5 02/63] drm/i915: Pin timeline map after first timeline pin, v3.
Maarten Lankhorst
maarten.lankhorst at linux.intel.com
Wed Nov 25 10:39:10 UTC 2020
We're starting to require the reservation lock for pinning,
so wait until we have that.
Update the selftests to handle this correctly, and ensure pin is
called in live_hwsp_rollover_user() and mock_hwsp_freelist().
Changes since v1:
- Fix NULL + XX arithmatic, use casts. (kbuild)
Changes since v2:
- Clear entire cacheline when pinning.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Reported-by: kernel test robot <lkp at intel.com>
---
drivers/gpu/drm/i915/gt/intel_timeline.c | 40 +++++++++----
drivers/gpu/drm/i915/gt/intel_timeline.h | 2 +
drivers/gpu/drm/i915/gt/mock_engine.c | 22 ++++++-
drivers/gpu/drm/i915/gt/selftest_timeline.c | 63 +++++++++++----------
drivers/gpu/drm/i915/i915_selftest.h | 2 +
5 files changed, 84 insertions(+), 45 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.c b/drivers/gpu/drm/i915/gt/intel_timeline.c
index 789530a6115f..d1f67c58ac78 100644
--- a/drivers/gpu/drm/i915/gt/intel_timeline.c
+++ b/drivers/gpu/drm/i915/gt/intel_timeline.c
@@ -53,14 +53,29 @@ static int __timeline_active(struct i915_active *active)
return 0;
}
+I915_SELFTEST_EXPORT int
+intel_timeline_pin_map(struct intel_timeline *timeline)
+{
+ struct drm_i915_gem_object *obj = timeline->hwsp_ggtt->obj;
+ u32 ofs = offset_in_page(timeline->hwsp_offset);
+ void *vaddr;
+
+ vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB);
+ if (IS_ERR(vaddr))
+ return PTR_ERR(vaddr);
+
+ timeline->hwsp_map = vaddr;
+ timeline->hwsp_seqno = memset(vaddr + ofs, 0, CACHELINE_BYTES);
+ clflush(vaddr + ofs);
+
+ return 0;
+}
+
static int intel_timeline_init(struct intel_timeline *timeline,
struct intel_gt *gt,
struct i915_vma *hwsp,
unsigned int offset)
{
- void *vaddr;
- u32 *seqno;
-
kref_init(&timeline->kref);
atomic_set(&timeline->pin_count, 0);
@@ -77,14 +92,8 @@ static int intel_timeline_init(struct intel_timeline *timeline,
timeline->hwsp_ggtt = hwsp;
}
- vaddr = i915_gem_object_pin_map(hwsp->obj, I915_MAP_WB);
- if (IS_ERR(vaddr))
- return PTR_ERR(vaddr);
-
- timeline->hwsp_map = vaddr;
- seqno = vaddr + timeline->hwsp_offset;
- WRITE_ONCE(*seqno, 0);
- timeline->hwsp_seqno = seqno;
+ timeline->hwsp_map = NULL;
+ timeline->hwsp_seqno = (void *)(long)timeline->hwsp_offset;
GEM_BUG_ON(timeline->hwsp_offset >= hwsp->size);
@@ -115,7 +124,8 @@ static void intel_timeline_fini(struct intel_timeline *timeline)
GEM_BUG_ON(!list_empty(&timeline->requests));
GEM_BUG_ON(timeline->retire);
- i915_gem_object_unpin_map(timeline->hwsp_ggtt->obj);
+ if (timeline->hwsp_map)
+ i915_gem_object_unpin_map(timeline->hwsp_ggtt->obj);
i915_vma_put(timeline->hwsp_ggtt);
i915_active_fini(&timeline->active);
@@ -155,6 +165,12 @@ int intel_timeline_pin(struct intel_timeline *tl, struct i915_gem_ww_ctx *ww)
if (atomic_add_unless(&tl->pin_count, 1, 0))
return 0;
+ if (!tl->hwsp_map) {
+ err = intel_timeline_pin_map(tl);
+ if (err)
+ return err;
+ }
+
err = i915_ggtt_pin(tl->hwsp_ggtt, ww, 0, PIN_HIGH);
if (err)
return err;
diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.h b/drivers/gpu/drm/i915/gt/intel_timeline.h
index 634acebd0c4b..6cbd17677005 100644
--- a/drivers/gpu/drm/i915/gt/intel_timeline.h
+++ b/drivers/gpu/drm/i915/gt/intel_timeline.h
@@ -115,4 +115,6 @@ void intel_gt_show_timelines(struct intel_gt *gt,
const char *prefix,
int indent));
+I915_SELFTEST_DECLARE(int intel_timeline_pin_map(struct intel_timeline *tl));
+
#endif
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index 2f830017c51d..effbac877eec 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -32,9 +32,20 @@
#include "mock_engine.h"
#include "selftests/mock_request.h"
-static void mock_timeline_pin(struct intel_timeline *tl)
+static int mock_timeline_pin(struct intel_timeline *tl)
{
+ int err;
+
+ if (WARN_ON(!i915_gem_object_trylock(tl->hwsp_ggtt->obj)))
+ return -EBUSY;
+
+ err = intel_timeline_pin_map(tl);
+ i915_gem_object_unlock(tl->hwsp_ggtt->obj);
+ if (err)
+ return err;
+
atomic_inc(&tl->pin_count);
+ return 0;
}
static void mock_timeline_unpin(struct intel_timeline *tl)
@@ -152,6 +163,8 @@ static void mock_context_destroy(struct kref *ref)
static int mock_context_alloc(struct intel_context *ce)
{
+ int err;
+
ce->ring = mock_ring(ce->engine);
if (!ce->ring)
return -ENOMEM;
@@ -162,7 +175,12 @@ static int mock_context_alloc(struct intel_context *ce)
return PTR_ERR(ce->timeline);
}
- mock_timeline_pin(ce->timeline);
+ err = mock_timeline_pin(ce->timeline);
+ if (err) {
+ intel_timeline_put(ce->timeline);
+ ce->timeline = NULL;
+ return err;
+ }
return 0;
}
diff --git a/drivers/gpu/drm/i915/gt/selftest_timeline.c b/drivers/gpu/drm/i915/gt/selftest_timeline.c
index 365ba1d088ba..c8d7552501a7 100644
--- a/drivers/gpu/drm/i915/gt/selftest_timeline.c
+++ b/drivers/gpu/drm/i915/gt/selftest_timeline.c
@@ -34,7 +34,7 @@ static unsigned long hwsp_cacheline(struct intel_timeline *tl)
{
unsigned long address = (unsigned long)page_address(hwsp_page(tl));
- return (address + tl->hwsp_offset) / CACHELINE_BYTES;
+ return (address + offset_in_page(tl->hwsp_offset)) / CACHELINE_BYTES;
}
#define CACHELINES_PER_PAGE (PAGE_SIZE / CACHELINE_BYTES)
@@ -58,6 +58,7 @@ static void __mock_hwsp_record(struct mock_hwsp_freelist *state,
tl = xchg(&state->history[idx], tl);
if (tl) {
radix_tree_delete(&state->cachelines, hwsp_cacheline(tl));
+ intel_timeline_unpin(tl);
intel_timeline_put(tl);
}
}
@@ -77,6 +78,12 @@ static int __mock_hwsp_timeline(struct mock_hwsp_freelist *state,
if (IS_ERR(tl))
return PTR_ERR(tl);
+ err = intel_timeline_pin(tl, NULL);
+ if (err) {
+ intel_timeline_put(tl);
+ return err;
+ }
+
cacheline = hwsp_cacheline(tl);
err = radix_tree_insert(&state->cachelines, cacheline, tl);
if (err) {
@@ -84,6 +91,7 @@ static int __mock_hwsp_timeline(struct mock_hwsp_freelist *state,
pr_err("HWSP cacheline %lu already used; duplicate allocation!\n",
cacheline);
}
+ intel_timeline_unpin(tl);
intel_timeline_put(tl);
return err;
}
@@ -451,7 +459,7 @@ static int emit_ggtt_store_dw(struct i915_request *rq, u32 addr, u32 value)
}
static struct i915_request *
-tl_write(struct intel_timeline *tl, struct intel_engine_cs *engine, u32 value)
+checked_tl_write(struct intel_timeline *tl, struct intel_engine_cs *engine, u32 value)
{
struct i915_request *rq;
int err;
@@ -462,6 +470,13 @@ tl_write(struct intel_timeline *tl, struct intel_engine_cs *engine, u32 value)
goto out;
}
+ if (READ_ONCE(*tl->hwsp_seqno) != tl->seqno) {
+ pr_err("Timeline created with incorrect breadcrumb, found %x, expected %x\n",
+ *tl->hwsp_seqno, tl->seqno);
+ intel_timeline_unpin(tl);
+ return ERR_PTR(-EINVAL);
+ }
+
rq = intel_engine_create_kernel_request(engine);
if (IS_ERR(rq))
goto out_unpin;
@@ -483,25 +498,6 @@ tl_write(struct intel_timeline *tl, struct intel_engine_cs *engine, u32 value)
return rq;
}
-static struct intel_timeline *
-checked_intel_timeline_create(struct intel_gt *gt)
-{
- struct intel_timeline *tl;
-
- tl = intel_timeline_create(gt);
- if (IS_ERR(tl))
- return tl;
-
- if (READ_ONCE(*tl->hwsp_seqno) != tl->seqno) {
- pr_err("Timeline created with incorrect breadcrumb, found %x, expected %x\n",
- *tl->hwsp_seqno, tl->seqno);
- intel_timeline_put(tl);
- return ERR_PTR(-EINVAL);
- }
-
- return tl;
-}
-
static int live_hwsp_engine(void *arg)
{
#define NUM_TIMELINES 4096
@@ -534,13 +530,13 @@ static int live_hwsp_engine(void *arg)
struct intel_timeline *tl;
struct i915_request *rq;
- tl = checked_intel_timeline_create(gt);
+ tl = intel_timeline_create(gt);
if (IS_ERR(tl)) {
err = PTR_ERR(tl);
break;
}
- rq = tl_write(tl, engine, count);
+ rq = checked_tl_write(tl, engine, count);
if (IS_ERR(rq)) {
intel_timeline_put(tl);
err = PTR_ERR(rq);
@@ -607,14 +603,14 @@ static int live_hwsp_alternate(void *arg)
if (!intel_engine_can_store_dword(engine))
continue;
- tl = checked_intel_timeline_create(gt);
+ tl = intel_timeline_create(gt);
if (IS_ERR(tl)) {
err = PTR_ERR(tl);
goto out;
}
intel_engine_pm_get(engine);
- rq = tl_write(tl, engine, count);
+ rq = checked_tl_write(tl, engine, count);
intel_engine_pm_put(engine);
if (IS_ERR(rq)) {
intel_timeline_put(tl);
@@ -1257,6 +1253,10 @@ static int live_hwsp_rollover_user(void *arg)
if (!tl->has_initial_breadcrumb)
goto out;
+ err = intel_context_pin(ce);
+ if (err)
+ goto out;
+
tl->seqno = -4u;
WRITE_ONCE(*(u32 *)tl->hwsp_seqno, tl->seqno);
@@ -1266,7 +1266,7 @@ static int live_hwsp_rollover_user(void *arg)
this = intel_context_create_request(ce);
if (IS_ERR(this)) {
err = PTR_ERR(this);
- goto out;
+ goto out_unpin;
}
pr_debug("%s: create fence.seqnp:%d\n",
@@ -1285,17 +1285,18 @@ static int live_hwsp_rollover_user(void *arg)
if (i915_request_wait(rq[2], 0, HZ / 5) < 0) {
pr_err("Wait for timeline wrap timed out!\n");
err = -EIO;
- goto out;
+ goto out_unpin;
}
for (i = 0; i < ARRAY_SIZE(rq); i++) {
if (!i915_request_completed(rq[i])) {
pr_err("Pre-wrap request not completed!\n");
err = -EINVAL;
- goto out;
+ goto out_unpin;
}
}
-
+out_unpin:
+ intel_context_unpin(ce);
out:
for (i = 0; i < ARRAY_SIZE(rq); i++)
i915_request_put(rq[i]);
@@ -1337,13 +1338,13 @@ static int live_hwsp_recycle(void *arg)
struct intel_timeline *tl;
struct i915_request *rq;
- tl = checked_intel_timeline_create(gt);
+ tl = intel_timeline_create(gt);
if (IS_ERR(tl)) {
err = PTR_ERR(tl);
break;
}
- rq = tl_write(tl, engine, count);
+ rq = checked_tl_write(tl, engine, count);
if (IS_ERR(rq)) {
intel_timeline_put(tl);
err = PTR_ERR(rq);
diff --git a/drivers/gpu/drm/i915/i915_selftest.h b/drivers/gpu/drm/i915/i915_selftest.h
index d53d207ab6eb..f54de0499be7 100644
--- a/drivers/gpu/drm/i915/i915_selftest.h
+++ b/drivers/gpu/drm/i915/i915_selftest.h
@@ -107,6 +107,7 @@ int __i915_subtests(const char *caller,
#define I915_SELFTEST_DECLARE(x) x
#define I915_SELFTEST_ONLY(x) unlikely(x)
+#define I915_SELFTEST_EXPORT
#else /* !IS_ENABLED(CONFIG_DRM_I915_SELFTEST) */
@@ -116,6 +117,7 @@ static inline int i915_perf_selftests(struct pci_dev *pdev) { return 0; }
#define I915_SELFTEST_DECLARE(x)
#define I915_SELFTEST_ONLY(x) 0
+#define I915_SELFTEST_EXPORT static
#endif
--
2.29.2.222.g5d2a92d10f8
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