From: Tvrtko Ursulin <tursulin@ursulin.net>
To: Intel-gfx@lists.freedesktop.org
Subject: [RFC 08/10] drm/i915: Allow creating virtual contexts
Date: Thu, 25 Jan 2018 13:33:31 +0000 [thread overview]
Message-ID: <20180125133333.13425-9-tvrtko.ursulin@linux.intel.com> (raw)
In-Reply-To: <20180125133333.13425-1-tvrtko.ursulin@linux.intel.com>
From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Virtual context imply the target engine will be picked by the driver.
v2: Disallow legacy execbuf API.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
drivers/gpu/drm/i915/i915_gem_context.c | 15 ++++++++++-----
drivers/gpu/drm/i915/i915_gem_context.h | 2 ++
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 6 ++++++
include/uapi/drm/i915_drm.h | 2 +-
4 files changed, 19 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 22b0fa170fcf..8f5f23b0dd34 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -667,15 +667,18 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
unsigned int flags = CREATE_VM | CREATE_TIMELINE;
int err;
- if (!dev_priv->engine[RCS]->context_size)
- return -ENODEV;
-
- if (args->pad != 0)
+ if (args->flags & ~I915_GEM_CONTEXT_SHARE_GTT)
return -EINVAL;
- if (args->flags & ~I915_GEM_CONTEXT_SHARE_GTT)
+ if (args->virtual > 1)
return -EINVAL;
+ if (!dev_priv->engine[RCS]->context_size)
+ return -ENODEV;
+
+ if (args->virtual && !HAS_BSD2(dev_priv))
+ return -ENODEV;
+
if (client_is_banned(file_priv)) {
DRM_DEBUG("client %s[%d] banned from creating ctx\n",
current->comm,
@@ -716,6 +719,8 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
GEM_BUG_ON(i915_gem_context_is_kernel(ctx));
+ ctx->virtual = args->virtual;
+
args->ctx_id = ctx->user_handle;
DRM_DEBUG("HW context %d created\n", args->ctx_id);
diff --git a/drivers/gpu/drm/i915/i915_gem_context.h b/drivers/gpu/drm/i915/i915_gem_context.h
index cfa69b12a6b2..5afe050718b8 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.h
+++ b/drivers/gpu/drm/i915/i915_gem_context.h
@@ -149,6 +149,8 @@ struct i915_gem_context {
*/
int priority;
+ unsigned int virtual;
+
/** ggtt_offset_bias: placement restriction for context objects */
u32 ggtt_offset_bias;
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 78340ceb1105..fa1806ed9be6 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -2026,6 +2026,9 @@ static int eb_select_engine_class_instance(struct i915_execbuffer *eb)
I915_EXEC_ENGINE_CAP_SHIFT;
struct intel_engine_cs *engine;
+ if (instance && eb->ctx->virtual)
+ return -EINVAL;
+
engine = intel_engine_lookup_user(eb->i915, class, instance);
if (engine && ((caps & engine->caps) != caps))
@@ -2068,6 +2071,9 @@ static int eb_select_engine(struct i915_execbuffer *eb, struct drm_file *file)
return -EINVAL;
}
+ if (user_ring_id == I915_EXEC_BSD && eb->ctx->virtual)
+ return -EINVAL;
+
if (user_ring_id == I915_EXEC_BSD && HAS_BSD2(dev_priv)) {
unsigned int bsd_idx = flags & I915_EXEC_BSD_MASK;
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 8b8b70c5a50b..42eb34b9c014 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1431,7 +1431,7 @@ struct drm_i915_gem_context_create_v2 {
__u32 flags;
#define I915_GEM_CONTEXT_SHARE_GTT 0x1
__u32 share_ctx;
- __u32 pad;
+ __u32 virtual;
};
struct drm_i915_gem_context_destroy {
--
2.14.1
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2018-01-25 13:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-25 13:33 [RFC 00/10] Virtual queue/engine uAPI prototype Tvrtko Ursulin
2018-01-25 13:33 ` [RFC 01/10] move-timeline-to-ctx Tvrtko Ursulin
2018-01-25 13:33 ` [RFC 02/10] drm/i915: Extend CREATE_CONTEXT to allow inheritance ala clone() Tvrtko Ursulin
2018-01-25 13:33 ` [RFC 03/10] drm/i915: Select engines via class and instance in execbuffer2 Tvrtko Ursulin
2018-01-25 13:33 ` [RFC 04/10] drm/i915: Engine capabilities uAPI Tvrtko Ursulin
2018-01-25 13:33 ` [RFC 05/10] drm/i915: Re-arrange execbuf so context is known before engine Tvrtko Ursulin
2018-01-25 13:33 ` [RFC 06/10] drm/i915: Refactor eb_select_engine to take eb Tvrtko Ursulin
2018-01-25 13:33 ` [RFC 07/10] drm/i915: Track latest request per engine class Tvrtko Ursulin
2018-01-25 13:33 ` Tvrtko Ursulin [this message]
2018-01-25 13:33 ` [RFC 09/10] drm/i915: Trivial virtual engine implementation Tvrtko Ursulin
2018-01-25 13:57 ` Chris Wilson
2018-01-25 14:26 ` Tvrtko Ursulin
2018-01-25 14:32 ` Chris Wilson
2018-01-25 14:36 ` Tvrtko Ursulin
2018-01-25 13:33 ` [RFC 10/10] drm/i915: Naive engine busyness based load balancing Tvrtko Ursulin
2018-01-25 14:12 ` ✗ Fi.CI.BAT: failure for Virtual queue/engine uAPI prototype Patchwork
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=20180125133333.13425-9-tvrtko.ursulin@linux.intel.com \
--to=tursulin@ursulin.net \
--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