[Intel-gfx] [PATCH] intel: Export pooled EU and min no. of eus in a pool.

[Yang, Rong R]

Yes, it is libdrm patch. I have merged the beignet patch right now, but still depend on the libdrm patch, I will resend it to libdrm now. Thanks.

> -----Original Message-----
> From: Arun Siluvery [mailto:arun.siluvery at linux.intel.com]
> Sent: Tuesday, July 5, 2016 18:01
> To: Yang, Rong R <rong.r.yang at intel.com>; beignet at lists.freedesktop.org;
> intel-gfx at lists.freedesktop.org
> Subject: Re: [PATCH] intel: Export pooled EU and min no. of eus in a pool.
> 
> On 15/06/2016 09:19, Yang Rong wrote:
> > Update kernel interface with new I915_GETPARAM ioctl entries for
> > pooled EU and min no. of eus in a pool. Add a wrapping function for
> > each parameter. Userspace drivers need these values when decide the
> > thread count. This kernel enabled pooled eu by default for BXT and for
> > fused down 2x6 parts it is advised to turn it off.
> >
> > But there is another HW issue in these parts (fused down 2x6 parts)
> > before C0 that requires Pooled EU to be enabled as a workaround. In
> > this case the pool configuration changes depending upon which subslice
> > is disabled and the no. of eus in a pool is different, So userspace
> > need to know min no. of eus in a pool.
> >
> > Signed-off-by: Yang Rong <rong.r.yang at intel.com>
> > ---
> >   include/drm/i915_drm.h   |  2 ++
> >   intel/intel_bufmgr.h     |  3 +++
> >   intel/intel_bufmgr_gem.c | 32 ++++++++++++++++++++++++++++++++
> >   3 files changed, 37 insertions(+)
> >
> > diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h index
> > c4ce6b2..eb611a7 100644
> > --- a/include/drm/i915_drm.h
> > +++ b/include/drm/i915_drm.h
> > @@ -357,6 +357,8 @@ typedef struct drm_i915_irq_wait {
> >   #define I915_PARAM_HAS_GPU_RESET	 35
> >   #define I915_PARAM_HAS_RESOURCE_STREAMER 36
> >   #define I915_PARAM_HAS_EXEC_SOFTPIN	 37
> > +#define I915_PARAM_HAS_POOLED_EU         38
> > +#define I915_PARAM_MIN_EU_IN_POOL        39
> >
> 
> Is this patch meant for libdrm or is there a i915_drm.h included in beignet?
> would you be sending a patch to libdrm?
> 
> Please note that these are now added to kernel so userspace can start using
> them.
> 
> Please let me know when these changes are going to be merged to beignet
> repo.
> 
> regards
> Arun
> 
> >   typedef struct drm_i915_getparam {
> >   	__s32 param;
> > diff --git a/intel/intel_bufmgr.h b/intel/intel_bufmgr.h index
> > a1abbcd..8370694 100644
> > --- a/intel/intel_bufmgr.h
> > +++ b/intel/intel_bufmgr.h
> > @@ -273,6 +273,9 @@ int drm_intel_get_reset_stats(drm_intel_context
> *ctx,
> >   int drm_intel_get_subslice_total(int fd, unsigned int *subslice_total);
> >   int drm_intel_get_eu_total(int fd, unsigned int *eu_total);
> >
> > +int drm_intel_get_pooled_eu(int fd, unsigned int *has_pooled_eu); int
> > +drm_intel_get_min_eu_in_pool(int fd, unsigned int *min_eu);
> > +
> >   /** @{ Compatibility defines to keep old code building despite the symbol
> rename
> >    * from dri_* to drm_intel_*
> >    */
> > diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c index
> > 0a4012b..b8bb654 100644
> > --- a/intel/intel_bufmgr_gem.c
> > +++ b/intel/intel_bufmgr_gem.c
> > @@ -3237,6 +3237,38 @@ drm_intel_get_eu_total(int fd, unsigned int
> *eu_total)
> >   	return 0;
> >   }
> >
> > +int
> > +drm_intel_get_pooled_eu(int fd, unsigned int *has_pooled_eu) {
> > +	drm_i915_getparam_t gp;
> > +	int ret;
> > +
> > +	memclear(gp);
> > +	gp.value = (int*)has_pooled_eu;
> > +	gp.param = I915_PARAM_HAS_POOLED_EU;
> > +	ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
> > +	if (ret)
> > +		return -errno;
> > +
> > +	return 0;
> > +}
> > +
> > +int
> > +drm_intel_get_min_eu_in_pool(int fd, unsigned int *min_eu) {
> > +	drm_i915_getparam_t gp;
> > +	int ret;
> > +
> > +	memclear(gp);
> > +	gp.value = (int*)min_eu;
> > +	gp.param = I915_PARAM_MIN_EU_IN_POOL;
> > +	ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
> > +	if (ret)
> > +		return -errno;
> > +
> > +	return 0;
> > +}
> > +
> >   /**
> >    * Annotate the given bo for use in aub dumping.
> >    *
> >