From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [PATCH 2/2] drm/i915: Increase max fence pitch limit to 256KB on IVB+ Date: Tue, 9 Apr 2013 15:03:28 +0300 Message-ID: <20130409120328.GP4469@intel.com> References: <1365497105-13105-1-git-send-email-ville.syrjala@linux.intel.com> <1365497105-13105-2-git-send-email-ville.syrjala@linux.intel.com> <20130409115401.GV2228@phenom.ffwll.local> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 8C52BE5BF0 for ; Tue, 9 Apr 2013 05:03:42 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20130409115401.GV2228@phenom.ffwll.local> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Daniel Vetter Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org On Tue, Apr 09, 2013 at 01:54:01PM +0200, Daniel Vetter wrote: > On Tue, Apr 09, 2013 at 11:45:05AM +0300, ville.syrjala@linux.intel.com w= rote: > > From: Ville Syrj=E4l=E4 > > = > > BSpec contains several scattered notes which state that the maximum > > fence stride was increased to 256KB on IVB. > > = > > Testing on real hardware agrees. > > = > > Signed-off-by: Ville Syrj=E4l=E4 > > --- > > drivers/gpu/drm/i915/i915_gem_tiling.c | 9 ++++++--- > > drivers/gpu/drm/i915/i915_reg.h | 1 + > > 2 files changed, 7 insertions(+), 3 deletions(-) > > = > > diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i= 915/i915_gem_tiling.c > > index c807eb9..139d17d 100644 > > --- a/drivers/gpu/drm/i915/i915_gem_tiling.c > > +++ b/drivers/gpu/drm/i915/i915_gem_tiling.c > > @@ -217,9 +217,12 @@ i915_tiling_ok(struct drm_device *dev, int stride,= int size, int tiling_mode) > > tile_width =3D 512; > > = > > /* check maximum stride & object size */ > > - if (INTEL_INFO(dev)->gen >=3D 4) { > > - /* i965 stores the end address of the gtt mapping in the fence > > - * reg, so dont bother to check the size */ > > + /* i965+ stores the end address of the gtt mapping in the fence > > + * reg, so dont bother to check the size */ > > + if (INTEL_INFO(dev)->gen >=3D 7) { > = > I've thought that his does not apply to vlv? Or has that now changed? The docs are telling me that VLV also has 256KB max stride. > -Daniel > = > > + if (stride / 128 > GEN7_FENCE_MAX_PITCH_VAL) > > + return false; > > + } else if (INTEL_INFO(dev)->gen >=3D 4) { > > if (stride / 128 > I965_FENCE_MAX_PITCH_VAL) > > return false; > > } else { > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i91= 5_reg.h > > index 0e4b7fb..ec4e054 100644 > > --- a/drivers/gpu/drm/i915/i915_reg.h > > +++ b/drivers/gpu/drm/i915/i915_reg.h > > @@ -424,6 +424,7 @@ > > = > > #define FENCE_REG_SANDYBRIDGE_0 0x100000 > > #define SANDYBRIDGE_FENCE_PITCH_SHIFT 32 > > +#define GEN7_FENCE_MAX_PITCH_VAL 0x0800 > > = > > /* control register for cpu gtt access */ > > #define TILECTL 0x101000 > > -- = > > 1.8.1.5 > > = > > _______________________________________________ > > Intel-gfx mailing list > > Intel-gfx@lists.freedesktop.org > > http://lists.freedesktop.org/mailman/listinfo/intel-gfx > = > -- = > Daniel Vetter > Software Engineer, Intel Corporation > +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- = Ville Syrj=E4l=E4 Intel OTC