Igt-dev Archive on lore.kernel.org
 help / color / mirror / Atom feed
From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Cc: igt-dev@lists.freedesktop.org, Chris Wilson <chris@chris-wilson.co.uk>
Subject: [igt-dev] [PATCH i-g-t 1/2] lib/i915: Report scheduler caps for timeslicing
Date: Wed, 13 May 2020 18:02:23 +0100	[thread overview]
Message-ID: <20200513170224.848726-1-chris@chris-wilson.co.uk> (raw)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 include/drm-uapi/i915_drm.h |  8 +++++---
 lib/i915/gem_scheduler.c    | 15 +++++++++++++++
 lib/i915/gem_scheduler.h    |  1 +
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/include/drm-uapi/i915_drm.h b/include/drm-uapi/i915_drm.h
index 2b55af13a..a222b6bfb 100644
--- a/include/drm-uapi/i915_drm.h
+++ b/include/drm-uapi/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
 
@@ -1040,9 +1041,10 @@ struct drm_i915_gem_exec_fence {
 	 */
 	__u32 handle;
 
-#define I915_EXEC_FENCE_WAIT            (1<<0)
-#define I915_EXEC_FENCE_SIGNAL          (1<<1)
-#define __I915_EXEC_FENCE_UNKNOWN_FLAGS (-(I915_EXEC_FENCE_SIGNAL << 1))
+#define I915_EXEC_FENCE_WAIT            (1u << 0)
+#define I915_EXEC_FENCE_SIGNAL          (1u << 1)
+#define I915_EXEC_FENCE_WAIT_SUBMIT     (1u << 2)
+#define __I915_EXEC_FENCE_UNKNOWN_FLAGS (-(I915_EXEC_FENCE_WAIT_SUBMIT << 1))
 	__u32 flags;
 };
 
diff --git a/lib/i915/gem_scheduler.c b/lib/i915/gem_scheduler.c
index 184da8436..7873766ae 100644
--- a/lib/i915/gem_scheduler.c
+++ b/lib/i915/gem_scheduler.c
@@ -129,6 +129,19 @@ bool gem_scheduler_has_engine_busy_stats(int fd)
 		I915_SCHEDULER_CAP_ENGINE_BUSY_STATS;
 }
 
+/**
+ * gem_scheduler_has_timeslicing:
+ * @fd: open i915 drm file descriptor
+ *
+ * Feature test macro to query whether the driver supports using HW preemption
+ * to implement timeslicing of userspace batches. This allows userspace to
+ * implement micro-level scheduling within their own batches.
+ */
+bool gem_scheduler_has_timeslicing(int fd)
+{
+	return gem_scheduler_capability(fd) & I915_SCHEDULER_CAP_TIMESLICING;
+}
+
 /**
  * gem_scheduler_print_capability:
  * @fd: open i915 drm file descriptor
@@ -149,6 +162,8 @@ void gem_scheduler_print_capability(int fd)
 		igt_info(" - With preemption enabled\n");
 	if (caps & I915_SCHEDULER_CAP_SEMAPHORES)
 		igt_info(" - With HW semaphores enabled\n");
+	if (caps & I915_SCHEDULER_CAP_TIMESLICING)
+		igt_info(" - With user timeslicing enabled\n");
 	if (caps & I915_SCHEDULER_CAP_ENGINE_BUSY_STATS)
 		igt_info(" - With engine busy statistics\n");
 }
diff --git a/lib/i915/gem_scheduler.h b/lib/i915/gem_scheduler.h
index 14bd4cac4..d43e84bd2 100644
--- a/lib/i915/gem_scheduler.h
+++ b/lib/i915/gem_scheduler.h
@@ -32,6 +32,7 @@ bool gem_scheduler_has_ctx_priority(int fd);
 bool gem_scheduler_has_preemption(int fd);
 bool gem_scheduler_has_semaphores(int fd);
 bool gem_scheduler_has_engine_busy_stats(int fd);
+bool gem_scheduler_has_timeslicing(int fd);
 void gem_scheduler_print_capability(int fd);
 
 #endif /* GEM_SCHEDULER_H */
-- 
2.26.2

_______________________________________________
igt-dev mailing list
igt-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/igt-dev

             reply	other threads:[~2020-05-13 17:02 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-13 17:02 Chris Wilson [this message]
2020-05-13 17:02 ` [igt-dev] [PATCH i-g-t 2/2] i915/gem_exec_fence: Teach invalid-wait about invalid future fences Chris Wilson
2020-05-13 18:10 ` [igt-dev] ✓ Fi.CI.BAT: success for series starting with [i-g-t,1/2] lib/i915: Report scheduler caps for timeslicing Patchwork
2020-05-13 21:47 ` [igt-dev] ✓ Fi.CI.IGT: " Patchwork
2020-05-14  3:41 ` [igt-dev] [PATCH i-g-t 1/2] " Petri Latvala
2020-05-15 11:44 ` [igt-dev] ✗ GitLab.Pipeline: failure for series starting with [i-g-t,1/2] " Patchwork
  -- strict thread matches above, loose matches on Subject: below --
2020-05-05 22:09 [igt-dev] [PATCH i-g-t 1/2] " Chris Wilson
2020-05-05 13:38 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=20200513170224.848726-1-chris@chris-wilson.co.uk \
    --to=chris@chris-wilson.co.uk \
    --cc=igt-dev@lists.freedesktop.org \
    --cc=intel-gfx@lists.freedesktop.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox