[Intel-gfx] [PATCH 12/25] drm/i915: Use HWS for seqno tracking everywhere
Chris Wilson
chris at chris-wilson.co.uk
Sat Jun 25 10:12:55 UTC 2016
By using the same address for storing the HWS on every platform, we can
remove the platform specific vfuncs and reduce the get-seqno routine to
a single read of a cached memory location.
v2: Fix semaphore_passed() to look at the signaling engine (not the
waiter's)
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_debugfs.c | 6 +--
drivers/gpu/drm/i915/i915_drv.h | 4 +-
drivers/gpu/drm/i915/i915_gpu_error.c | 2 +-
drivers/gpu/drm/i915/i915_irq.c | 4 +-
drivers/gpu/drm/i915/i915_trace.h | 2 +-
drivers/gpu/drm/i915/intel_breadcrumbs.c | 4 +-
drivers/gpu/drm/i915/intel_lrc.c | 26 +---------
drivers/gpu/drm/i915/intel_ringbuffer.c | 83 ++++++++------------------------
drivers/gpu/drm/i915/intel_ringbuffer.h | 7 +--
9 files changed, 36 insertions(+), 102 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index dba298c7a8b8..30dcae2bf303 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -662,7 +662,7 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data)
engine->name,
i915_gem_request_get_seqno(work->flip_queued_req),
dev_priv->next_seqno,
- engine->get_seqno(engine),
+ intel_engine_get_seqno(engine),
i915_gem_request_completed(work->flip_queued_req));
} else
seq_printf(m, "Flip not associated with any ring\n");
@@ -792,7 +792,7 @@ static void i915_ring_seqno_info(struct seq_file *m,
struct rb_node *rb;
seq_printf(m, "Current sequence (%s): %x\n",
- engine->name, engine->get_seqno(engine));
+ engine->name, intel_engine_get_seqno(engine));
seq_printf(m, "Current user interrupts (%s): %x\n",
engine->name, READ_ONCE(engine->user_interrupts));
@@ -1417,7 +1417,7 @@ static int i915_hangcheck_info(struct seq_file *m, void *unused)
for_each_engine_id(engine, dev_priv, id) {
acthd[id] = intel_ring_get_active_head(engine);
- seqno[id] = engine->get_seqno(engine);
+ seqno[id] = intel_engine_get_seqno(engine);
}
i915_get_extra_instdone(dev_priv, instdone);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4cc372df3534..f4b883a58b68 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3279,13 +3279,13 @@ i915_seqno_passed(uint32_t seq1, uint32_t seq2)
static inline bool i915_gem_request_started(const struct drm_i915_gem_request *req)
{
- return i915_seqno_passed(req->engine->get_seqno(req->engine),
+ return i915_seqno_passed(intel_engine_get_seqno(req->engine),
req->previous_seqno);
}
static inline bool i915_gem_request_completed(const struct drm_i915_gem_request *req)
{
- return i915_seqno_passed(req->engine->get_seqno(req->engine),
+ return i915_seqno_passed(intel_engine_get_seqno(req->engine),
req->seqno);
}
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 606f74e15208..bf0851d13916 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -983,7 +983,7 @@ static void i915_record_ring_state(struct drm_i915_private *dev_priv,
ering->waiting = intel_engine_has_waiter(engine);
ering->instpm = I915_READ(RING_INSTPM(engine->mmio_base));
ering->acthd = intel_ring_get_active_head(engine);
- ering->seqno = engine->get_seqno(engine);
+ ering->seqno = intel_engine_get_seqno(engine);
ering->last_seqno = engine->last_submitted_seqno;
ering->start = I915_READ_START(engine);
ering->head = I915_READ_HEAD(engine);
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index a11ab00cdee0..7c379afcff2f 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2952,7 +2952,7 @@ static int semaphore_passed(struct intel_engine_cs *engine)
if (signaller->hangcheck.deadlock >= I915_NUM_ENGINES)
return -1;
- if (i915_seqno_passed(signaller->get_seqno(signaller), seqno))
+ if (i915_seqno_passed(intel_engine_get_seqno(signaller), seqno))
return 1;
/* cursory check for an unkickable deadlock */
@@ -3140,7 +3140,7 @@ static void i915_hangcheck_elapsed(struct work_struct *work)
engine->irq_seqno_barrier(engine);
acthd = intel_ring_get_active_head(engine);
- seqno = engine->get_seqno(engine);
+ seqno = intel_engine_get_seqno(engine);
/* Reset stuck interrupts between batch advances */
user_interrupts = 0;
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 6768db032f84..3d13fde95fdf 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -558,7 +558,7 @@ TRACE_EVENT(i915_gem_request_notify,
TP_fast_assign(
__entry->dev = engine->i915->dev->primary->index;
__entry->ring = engine->id;
- __entry->seqno = engine->get_seqno(engine);
+ __entry->seqno = intel_engine_get_seqno(engine);
),
TP_printk("dev=%u, ring=%u, seqno=%u",
diff --git a/drivers/gpu/drm/i915/intel_breadcrumbs.c b/drivers/gpu/drm/i915/intel_breadcrumbs.c
index 11ec077660a1..cb5e85192669 100644
--- a/drivers/gpu/drm/i915/intel_breadcrumbs.c
+++ b/drivers/gpu/drm/i915/intel_breadcrumbs.c
@@ -146,7 +146,7 @@ static bool __intel_engine_add_wait(struct intel_engine_cs *engine,
first = true;
parent = NULL;
completed = NULL;
- seqno = engine->get_seqno(engine);
+ seqno = intel_engine_get_seqno(engine);
/* If the request completed before we managed to grab the spinlock,
* return now before adding ourselves to the rbtree. We let the
@@ -294,7 +294,7 @@ void intel_engine_remove_wait(struct intel_engine_cs *engine,
* the first_waiter. This is undesirable if that
* waiter is a high priority task.
*/
- u32 seqno = engine->get_seqno(engine);
+ u32 seqno = intel_engine_get_seqno(engine);
while (i915_seqno_passed(seqno, to_wait(next)->seqno)) {
struct rb_node *n = rb_next(next);
__intel_breadcrumbs_finish(b, to_wait(next));
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index faa62d626211..97dc2ea59632 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1780,16 +1780,6 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
return 0;
}
-static u32 gen8_get_seqno(struct intel_engine_cs *engine)
-{
- return intel_read_status_page(engine, I915_GEM_HWS_INDEX);
-}
-
-static void gen8_set_seqno(struct intel_engine_cs *engine, u32 seqno)
-{
- intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno);
-}
-
static void bxt_a_seqno_barrier(struct intel_engine_cs *engine)
{
/*
@@ -1805,14 +1795,6 @@ static void bxt_a_seqno_barrier(struct intel_engine_cs *engine)
intel_flush_status_page(engine, I915_GEM_HWS_INDEX);
}
-static void bxt_a_set_seqno(struct intel_engine_cs *engine, u32 seqno)
-{
- intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno);
-
- /* See bxt_a_get_seqno() explaining the reason for the clflush. */
- intel_flush_status_page(engine, I915_GEM_HWS_INDEX);
-}
-
/*
* Reserve space for 2 NOOPs at the end of each request to be
* used as a workaround for not being allowed to do lite
@@ -1838,7 +1820,7 @@ static int gen8_emit_request(struct drm_i915_gem_request *request)
intel_hws_seqno_address(request->engine) |
MI_FLUSH_DW_USE_GTT);
intel_logical_ring_emit(ringbuf, 0);
- intel_logical_ring_emit(ringbuf, i915_gem_request_get_seqno(request));
+ intel_logical_ring_emit(ringbuf, request->seqno);
intel_logical_ring_emit(ringbuf, MI_USER_INTERRUPT);
intel_logical_ring_emit(ringbuf, MI_NOOP);
return intel_logical_ring_advance_and_submit(request);
@@ -1984,12 +1966,8 @@ logical_ring_default_vfuncs(struct intel_engine_cs *engine)
engine->irq_get = gen8_logical_ring_get_irq;
engine->irq_put = gen8_logical_ring_put_irq;
engine->emit_bb_start = gen8_emit_bb_start;
- engine->get_seqno = gen8_get_seqno;
- engine->set_seqno = gen8_set_seqno;
- if (IS_BXT_REVID(engine->i915, 0, BXT_REVID_A1)) {
+ if (IS_BXT_REVID(engine->i915, 0, BXT_REVID_A1))
engine->irq_seqno_barrier = bxt_a_seqno_barrier;
- engine->set_seqno = bxt_a_set_seqno;
- }
}
static inline void
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index d9dc6bc98194..96a80e96dbcf 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1362,19 +1362,17 @@ static int gen8_rcs_signal(struct drm_i915_gem_request *signaller_req,
return ret;
for_each_engine_id(waiter, dev_priv, id) {
- u32 seqno;
u64 gtt_offset = signaller->semaphore.signal_ggtt[id];
if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID)
continue;
- seqno = i915_gem_request_get_seqno(signaller_req);
intel_ring_emit(signaller, GFX_OP_PIPE_CONTROL(6));
intel_ring_emit(signaller, PIPE_CONTROL_GLOBAL_GTT_IVB |
PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_CS_STALL);
intel_ring_emit(signaller, lower_32_bits(gtt_offset));
intel_ring_emit(signaller, upper_32_bits(gtt_offset));
- intel_ring_emit(signaller, seqno);
+ intel_ring_emit(signaller, signaller_req->seqno);
intel_ring_emit(signaller, 0);
intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL |
MI_SEMAPHORE_TARGET(waiter->hw_id));
@@ -1403,18 +1401,16 @@ static int gen8_xcs_signal(struct drm_i915_gem_request *signaller_req,
return ret;
for_each_engine_id(waiter, dev_priv, id) {
- u32 seqno;
u64 gtt_offset = signaller->semaphore.signal_ggtt[id];
if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID)
continue;
- seqno = i915_gem_request_get_seqno(signaller_req);
intel_ring_emit(signaller, (MI_FLUSH_DW + 1) |
MI_FLUSH_DW_OP_STOREDW);
intel_ring_emit(signaller, lower_32_bits(gtt_offset) |
MI_FLUSH_DW_USE_GTT);
intel_ring_emit(signaller, upper_32_bits(gtt_offset));
- intel_ring_emit(signaller, seqno);
+ intel_ring_emit(signaller, signaller_req->seqno);
intel_ring_emit(signaller, MI_SEMAPHORE_SIGNAL |
MI_SEMAPHORE_TARGET(waiter->hw_id));
intel_ring_emit(signaller, 0);
@@ -1445,11 +1441,9 @@ static int gen6_signal(struct drm_i915_gem_request *signaller_req,
i915_reg_t mbox_reg = signaller->semaphore.mbox.signal[id];
if (i915_mmio_reg_valid(mbox_reg)) {
- u32 seqno = i915_gem_request_get_seqno(signaller_req);
-
intel_ring_emit(signaller, MI_LOAD_REGISTER_IMM(1));
intel_ring_emit_reg(signaller, mbox_reg);
- intel_ring_emit(signaller, seqno);
+ intel_ring_emit(signaller, signaller_req->seqno);
}
}
@@ -1485,7 +1479,7 @@ gen6_add_request(struct drm_i915_gem_request *req)
intel_ring_emit(engine, MI_STORE_DWORD_INDEX);
intel_ring_emit(engine,
I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
- intel_ring_emit(engine, i915_gem_request_get_seqno(req));
+ intel_ring_emit(engine, req->seqno);
intel_ring_emit(engine, MI_USER_INTERRUPT);
__intel_ring_advance(engine);
@@ -1624,7 +1618,9 @@ static int
pc_render_add_request(struct drm_i915_gem_request *req)
{
struct intel_engine_cs *engine = req->engine;
- u32 scratch_addr = engine->scratch.gtt_offset + 2 * CACHELINE_BYTES;
+ u32 addr = engine->status_page.gfx_addr +
+ (I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
+ u32 scratch_addr = addr;
int ret;
/* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently
@@ -1640,12 +1636,12 @@ pc_render_add_request(struct drm_i915_gem_request *req)
return ret;
intel_ring_emit(engine,
- GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
+ GFX_OP_PIPE_CONTROL(4) |
+ PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_WRITE_FLUSH |
PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE);
- intel_ring_emit(engine,
- engine->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
- intel_ring_emit(engine, i915_gem_request_get_seqno(req));
+ intel_ring_emit(engine, addr | PIPE_CONTROL_GLOBAL_GTT);
+ intel_ring_emit(engine, req->seqno);
intel_ring_emit(engine, 0);
PIPE_CONTROL_FLUSH(engine, scratch_addr);
scratch_addr += 2 * CACHELINE_BYTES; /* write to separate cachelines */
@@ -1660,13 +1656,12 @@ pc_render_add_request(struct drm_i915_gem_request *req)
PIPE_CONTROL_FLUSH(engine, scratch_addr);
intel_ring_emit(engine,
- GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
+ GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
PIPE_CONTROL_WRITE_FLUSH |
PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE |
PIPE_CONTROL_NOTIFY);
- intel_ring_emit(engine,
- engine->scratch.gtt_offset | PIPE_CONTROL_GLOBAL_GTT);
- intel_ring_emit(engine, i915_gem_request_get_seqno(req));
+ intel_ring_emit(engine, addr | PIPE_CONTROL_GLOBAL_GTT);
+ intel_ring_emit(engine, req->seqno);
intel_ring_emit(engine, 0);
__intel_ring_advance(engine);
@@ -1698,30 +1693,6 @@ gen6_seqno_barrier(struct intel_engine_cs *engine)
spin_unlock_irq(&dev_priv->uncore.lock);
}
-static u32
-ring_get_seqno(struct intel_engine_cs *engine)
-{
- return intel_read_status_page(engine, I915_GEM_HWS_INDEX);
-}
-
-static void
-ring_set_seqno(struct intel_engine_cs *engine, u32 seqno)
-{
- intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno);
-}
-
-static u32
-pc_render_get_seqno(struct intel_engine_cs *engine)
-{
- return engine->scratch.cpu_page[0];
-}
-
-static void
-pc_render_set_seqno(struct intel_engine_cs *engine, u32 seqno)
-{
- engine->scratch.cpu_page[0] = seqno;
-}
-
static bool
gen5_ring_get_irq(struct intel_engine_cs *engine)
{
@@ -1851,8 +1822,8 @@ i9xx_add_request(struct drm_i915_gem_request *req)
intel_ring_emit(engine, MI_STORE_DWORD_INDEX);
intel_ring_emit(engine,
- I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
- intel_ring_emit(engine, i915_gem_request_get_seqno(req));
+ I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
+ intel_ring_emit(engine, req->seqno);
intel_ring_emit(engine, MI_USER_INTERRUPT);
__intel_ring_advance(engine);
@@ -2671,7 +2642,9 @@ void intel_ring_init_seqno(struct intel_engine_cs *engine, u32 seqno)
memset(engine->semaphore.sync_seqno, 0,
sizeof(engine->semaphore.sync_seqno));
- engine->set_seqno(engine, seqno);
+ intel_write_status_page(engine, I915_GEM_HWS_INDEX, seqno);
+ if (engine->irq_seqno_barrier)
+ engine->irq_seqno_barrier(engine);
engine->last_submitted_seqno = seqno;
engine->hangcheck.seqno = seqno;
@@ -2920,8 +2893,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
engine->irq_get = gen8_ring_get_irq;
engine->irq_put = gen8_ring_put_irq;
engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT;
- engine->get_seqno = ring_get_seqno;
- engine->set_seqno = ring_set_seqno;
if (i915_semaphore_is_enabled(dev_priv)) {
WARN_ON(!dev_priv->semaphore_obj);
engine->semaphore.sync_to = gen8_ring_sync;
@@ -2938,8 +2909,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
engine->irq_put = gen6_ring_put_irq;
engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT;
engine->irq_seqno_barrier = gen6_seqno_barrier;
- engine->get_seqno = ring_get_seqno;
- engine->set_seqno = ring_set_seqno;
if (i915_semaphore_is_enabled(dev_priv)) {
engine->semaphore.sync_to = gen6_ring_sync;
engine->semaphore.signal = gen6_signal;
@@ -2964,8 +2933,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
} else if (IS_GEN5(dev_priv)) {
engine->add_request = pc_render_add_request;
engine->flush = gen4_render_ring_flush;
- engine->get_seqno = pc_render_get_seqno;
- engine->set_seqno = pc_render_set_seqno;
engine->irq_get = gen5_ring_get_irq;
engine->irq_put = gen5_ring_put_irq;
engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT |
@@ -2976,8 +2943,6 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
engine->flush = gen2_render_ring_flush;
else
engine->flush = gen4_render_ring_flush;
- engine->get_seqno = ring_get_seqno;
- engine->set_seqno = ring_set_seqno;
if (IS_GEN2(dev_priv)) {
engine->irq_get = i8xx_ring_get_irq;
engine->irq_put = i8xx_ring_put_irq;
@@ -3055,8 +3020,6 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
engine->flush = gen6_bsd_ring_flush;
engine->add_request = gen6_add_request;
engine->irq_seqno_barrier = gen6_seqno_barrier;
- engine->get_seqno = ring_get_seqno;
- engine->set_seqno = ring_set_seqno;
if (INTEL_GEN(dev_priv) >= 8) {
engine->irq_enable_mask =
GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT;
@@ -3094,8 +3057,6 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
engine->mmio_base = BSD_RING_BASE;
engine->flush = bsd_ring_flush;
engine->add_request = i9xx_add_request;
- engine->get_seqno = ring_get_seqno;
- engine->set_seqno = ring_set_seqno;
if (IS_GEN5(dev_priv)) {
engine->irq_enable_mask = ILK_BSD_USER_INTERRUPT;
engine->irq_get = gen5_ring_get_irq;
@@ -3130,8 +3091,6 @@ int intel_init_bsd2_ring_buffer(struct drm_device *dev)
engine->flush = gen6_bsd_ring_flush;
engine->add_request = gen6_add_request;
engine->irq_seqno_barrier = gen6_seqno_barrier;
- engine->get_seqno = ring_get_seqno;
- engine->set_seqno = ring_set_seqno;
engine->irq_enable_mask =
GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT;
engine->irq_get = gen8_ring_get_irq;
@@ -3163,8 +3122,6 @@ int intel_init_blt_ring_buffer(struct drm_device *dev)
engine->flush = gen6_ring_flush;
engine->add_request = gen6_add_request;
engine->irq_seqno_barrier = gen6_seqno_barrier;
- engine->get_seqno = ring_get_seqno;
- engine->set_seqno = ring_set_seqno;
if (INTEL_GEN(dev_priv) >= 8) {
engine->irq_enable_mask =
GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT;
@@ -3223,8 +3180,6 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev)
engine->flush = gen6_ring_flush;
engine->add_request = gen6_add_request;
engine->irq_seqno_barrier = gen6_seqno_barrier;
- engine->get_seqno = ring_get_seqno;
- engine->set_seqno = ring_set_seqno;
if (INTEL_GEN(dev_priv) >= 8) {
engine->irq_enable_mask =
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 601d6549d0db..76e1efd87533 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -219,9 +219,6 @@ struct intel_engine_cs {
* monotonic, even if not coherent.
*/
void (*irq_seqno_barrier)(struct intel_engine_cs *ring);
- u32 (*get_seqno)(struct intel_engine_cs *ring);
- void (*set_seqno)(struct intel_engine_cs *ring,
- u32 seqno);
int (*dispatch_execbuffer)(struct drm_i915_gem_request *req,
u64 offset, u32 length,
unsigned dispatch_flags);
@@ -497,6 +494,10 @@ int intel_init_blt_ring_buffer(struct drm_device *dev);
int intel_init_vebox_ring_buffer(struct drm_device *dev);
u64 intel_ring_get_active_head(struct intel_engine_cs *engine);
+static inline u32 intel_engine_get_seqno(struct intel_engine_cs *engine)
+{
+ return intel_read_status_page(engine, I915_GEM_HWS_INDEX);
+}
int init_workarounds_ring(struct intel_engine_cs *engine);
--
2.8.1
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