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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-27 10:54:01 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-27 11:42:53 +0300 |
| commit | bafb0fced98c7c135389b455faab380beac47ccc (patch) | |
| tree | a8dae563fcee3662435a8cf9a86bb903ae16e1f0 /drivers/gpu/drm/i915/i915_guc_submission.c | |
| parent | f6407193dd9d9e29fc94b7f6943c517cbee314bb (diff) | |
| download | linux-bafb0fced98c7c135389b455faab380beac47ccc.tar.xz | |
drm/i915: Make for_each_engine_masked() more compact and quicker
Rather than walk the full array of engines checking whether each is in
the mask in turn, we can use the mask to jump to the right engines. This
should quicker for a sparse array of engines or mask, whilst generating
smaller code:
text data bss dec hex filename
1251010 4579 800 1256389 132bc5 drivers/gpu/drm/i915/i915.ko
1250530 4579 800 1255909 1329e5 drivers/gpu/drm/i915/i915.ko
The downside is that we have to pass in a temporary, alas no C99
iterators yet.
[P.S. Joonas doesn't like having to pass extra temporaries into the
macro, and even less that I called them tmp. As yet, we haven't found a
macro that avoids passing in a temporary that is smaller. We probably
will get C99 iterators first!]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160827075401.16470-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_guc_submission.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_guc_submission.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c index e4369411f07d..32699a744aca 100644 --- a/drivers/gpu/drm/i915/i915_guc_submission.c +++ b/drivers/gpu/drm/i915/i915_guc_submission.c @@ -330,6 +330,7 @@ static void guc_init_ctx_desc(struct intel_guc *guc, struct i915_gem_context *ctx = client->owner; struct guc_context_desc desc; struct sg_table *sg; + unsigned int tmp; u32 gfx_addr; memset(&desc, 0, sizeof(desc)); @@ -339,7 +340,7 @@ static void guc_init_ctx_desc(struct intel_guc *guc, desc.priority = client->priority; desc.db_id = client->doorbell_id; - for_each_engine_masked(engine, dev_priv, client->engines) { + for_each_engine_masked(engine, dev_priv, client->engines, tmp) { struct intel_context *ce = &ctx->engine[engine->id]; uint32_t guc_engine_id = engine->guc_id; struct guc_execlist_context *lrc = &desc.lrc[guc_engine_id]; |