From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Cc: Kenneth Graunke <kenneth@whitecape.org>,
Chris Wilson <chris@chris-wilson.co.uk>
Subject: [Intel-gfx] [PATCH 10/10] drm/i915/gt: Declare when we enabled timeslicing
Date: Tue, 31 Mar 2020 22:26:00 +0100 [thread overview]
Message-ID: <20200331212600.16654-10-chris@chris-wilson.co.uk> (raw)
In-Reply-To: <20200331212600.16654-1-chris@chris-wilson.co.uk>
Let userspace know if they can trust timeslicing by including it as part
of the I915_PARAM_HAS_SCHEDULER::I915_SCHEDULER_CAP_TIMESLICING
v2: Only declare timeslicing if we can safely preempt userspace.
Fixes: 8ee36e048c98 ("drm/i915/execlists: Minimalistic timeslicing")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kenneth Graunke <kenneth@whitecape.org>
---
drivers/gpu/drm/i915/gt/intel_engine.h | 3 ++-
drivers/gpu/drm/i915/gt/intel_engine_user.c | 5 +++++
include/uapi/drm/i915_drm.h | 1 +
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
index b469de0dd9b6..424672ee7874 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -339,7 +339,8 @@ intel_engine_has_timeslices(const struct intel_engine_cs *engine)
if (!IS_ACTIVE(CONFIG_DRM_I915_TIMESLICE_DURATION))
return false;
- return intel_engine_has_semaphores(engine);
+ return (intel_engine_has_semaphores(engine) &&
+ intel_engine_has_preemption(engine));
}
#endif /* _INTEL_RINGBUFFER_H_ */
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_user.c b/drivers/gpu/drm/i915/gt/intel_engine_user.c
index 848decee9066..b84fdd722781 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_user.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_user.c
@@ -121,6 +121,11 @@ static void set_scheduler_caps(struct drm_i915_private *i915)
else
disabled |= BIT(map[i].sched);
}
+
+ if (intel_engine_has_timeslices(engine))
+ enabled |= I915_SCHEDULER_CAP_TIMESLICING;
+ else
+ disabled |= I915_SCHEDULER_CAP_TIMESLICING;
}
i915->caps.scheduler = enabled & ~disabled;
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 704dd0e3bc1d..1ee227b5131a 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -523,6 +523,7 @@ typedef struct drm_i915_irq_wait {
#define I915_SCHEDULER_CAP_PREEMPTION (1ul << 2)
#define I915_SCHEDULER_CAP_SEMAPHORES (1ul << 3)
#define I915_SCHEDULER_CAP_ENGINE_BUSY_STATS (1ul << 4)
+#define I915_SCHEDULER_CAP_TIMESLICING (1ul << 5)
#define I915_PARAM_HUC_STATUS 42
--
2.20.1
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2020-03-31 21:26 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-31 21:25 [Intel-gfx] [PATCH 01/10] drm/i915/selftests: Add request throughput measurement to perf Chris Wilson
2020-03-31 21:25 ` [Intel-gfx] [PATCH 02/10] drm/i915/gt: Yield the timeslice if caught waiting on a user semaphore Chris Wilson
2020-03-31 21:25 ` [Intel-gfx] [PATCH 03/10] dma-buf: Prettify typecasts for dma-fence-chain Chris Wilson
2020-03-31 21:25 ` [Intel-gfx] [PATCH 04/10] dma-buf: Report signaled links inside dma-fence-chain Chris Wilson
2020-03-31 21:25 ` [Intel-gfx] [PATCH 05/10] dma-buf: Exercise dma-fence-chain under selftests Chris Wilson
2020-03-31 21:25 ` [Intel-gfx] [PATCH 06/10] dma-buf: Proxy fence, an unsignaled fence placeholder Chris Wilson
2020-03-31 21:25 ` [Intel-gfx] [PATCH 07/10] drm/syncobj: Allow use of dma-fence-proxy Chris Wilson
2020-03-31 21:25 ` [Intel-gfx] [PATCH 08/10] drm/i915/gem: Teach execbuf how to wait on future syncobj Chris Wilson
2020-03-31 21:25 ` [Intel-gfx] [PATCH 09/10] drm/i915/gem: Allow combining submit-fences with syncobj Chris Wilson
2020-03-31 21:26 ` Chris Wilson [this message]
2020-03-31 23:58 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [01/10] drm/i915/selftests: Add request throughput measurement to perf Patchwork
2020-04-01 0:27 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
2020-04-03 9:12 [Intel-gfx] [PATCH 01/10] " Chris Wilson
2020-04-03 9:13 ` [Intel-gfx] [PATCH 10/10] drm/i915/gt: Declare when we enabled timeslicing Chris Wilson
2020-04-07 10:50 ` Tvrtko Ursulin
2020-04-07 10:55 ` Chris Wilson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200331212600.16654-10-chris@chris-wilson.co.uk \
--to=chris@chris-wilson.co.uk \
--cc=intel-gfx@lists.freedesktop.org \
--cc=kenneth@whitecape.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.