From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Subject: Re: [PATCH 12/24] drm/i915: Delay allocation of stolen space for FBC Date: Thu, 11 Oct 2012 11:49:36 -0700 Message-ID: <20121011114936.20de2c39@jbarnes-desktop> References: <1346788996-19080-1-git-send-email-chris@chris-wilson.co.uk> <1346788996-19080-13-git-send-email-chris@chris-wilson.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from oproxy8-pub.bluehost.com (oproxy8-pub.bluehost.com [69.89.22.20]) by gabe.freedesktop.org (Postfix) with SMTP id C7FC19E782 for ; Thu, 11 Oct 2012 11:48:56 -0700 (PDT) In-Reply-To: <1346788996-19080-13-git-send-email-chris@chris-wilson.co.uk> 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: Chris Wilson Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org On Tue, 4 Sep 2012 21:03:04 +0100 Chris Wilson wrote: > As we may wish to wrap regions preallocated by the BIOS, we need to do > that before carving out contiguous chunks of stolen space for FBC. > > Signed-off-by: Chris Wilson > --- > drivers/gpu/drm/i915/i915_drv.h | 1 + > drivers/gpu/drm/i915/i915_gem_stolen.c | 110 ++++++++++++++++---------------- > drivers/gpu/drm/i915/intel_display.c | 3 + > 3 files changed, 59 insertions(+), 55 deletions(-) > > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h > index 533361e..31d3a9f 100644 > --- a/drivers/gpu/drm/i915/i915_drv.h > +++ b/drivers/gpu/drm/i915/i915_drv.h > @@ -1491,6 +1491,7 @@ int i915_gem_evict_everything(struct drm_device *dev); > > /* i915_gem_stolen.c */ > int i915_gem_init_stolen(struct drm_device *dev); > +int i915_gem_stolen_setup_compression(struct drm_device *dev); > void i915_gem_cleanup_stolen(struct drm_device *dev); > > /* i915_gem_tiling.c */ > diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c > index a528e4a..17119d7 100644 > --- a/drivers/gpu/drm/i915/i915_gem_stolen.c > +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c > @@ -86,21 +86,13 @@ static unsigned long i915_stolen_to_physical(struct drm_device *dev) > return base; > } > > -static void i915_warn_stolen(struct drm_device *dev) > -{ > - DRM_INFO("not enough stolen space for compressed buffer, disabling\n"); > - DRM_INFO("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n"); > -} > - > -static void i915_setup_compression(struct drm_device *dev, int size) > +static int i915_setup_compression(struct drm_device *dev, int size) > { > struct drm_i915_private *dev_priv = dev->dev_private; > struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb); > - unsigned long cfb_base; > - unsigned long ll_base = 0; > > - /* Just in case the BIOS is doing something questionable. */ > - intel_disable_fbc(dev); > + DRM_DEBUG_KMS("reserving %d bytes of contiguous stolen space for FBC\n", > + size); > > compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0); > if (compressed_fb) > @@ -108,11 +100,11 @@ static void i915_setup_compression(struct drm_device *dev, int size) > if (!compressed_fb) > goto err; > > - cfb_base = dev_priv->mm.stolen_base + compressed_fb->start; > - if (!cfb_base) > - goto err_fb; > - > - if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) { > + if (HAS_PCH_SPLIT(dev)) > + I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start); > + else if (IS_GM45(dev)) { > + I915_WRITE(DPFC_CB_BASE, compressed_fb->start); > + } else { > compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen, > 4096, 4096, 0); > if (compressed_llb) > @@ -121,56 +113,78 @@ static void i915_setup_compression(struct drm_device *dev, int size) > if (!compressed_llb) > goto err_fb; > > - ll_base = dev_priv->mm.stolen_base + compressed_llb->start; > - if (!ll_base) > - goto err_llb; > - } > + dev_priv->compressed_llb = compressed_llb; > > - dev_priv->cfb_size = size; > + I915_WRITE(FBC_CFB_BASE, > + dev_priv->mm.stolen_base + compressed_fb->start); > + I915_WRITE(FBC_LL_BASE, > + dev_priv->mm.stolen_base + compressed_llb->start); > + } > > dev_priv->compressed_fb = compressed_fb; > - if (HAS_PCH_SPLIT(dev)) > - I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start); > - else if (IS_GM45(dev)) { > - I915_WRITE(DPFC_CB_BASE, compressed_fb->start); > - } else { > - I915_WRITE(FBC_CFB_BASE, cfb_base); > - I915_WRITE(FBC_LL_BASE, ll_base); > - dev_priv->compressed_llb = compressed_llb; > - } > + dev_priv->cfb_size = size; > > - DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", > - (long)cfb_base, (long)ll_base, size >> 20); > - return; > + return size; > > -err_llb: > - drm_mm_put_block(compressed_llb); > err_fb: > drm_mm_put_block(compressed_fb); > err: > dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; > - i915_warn_stolen(dev); > + DRM_INFO("not enough stolen space for compressed buffer (need %d bytes), disabling\n", size); > + DRM_INFO("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n"); > + return 0; > +} > + > +int i915_gem_stolen_setup_compression(struct drm_device *dev) > +{ > + struct drm_i915_private *dev_priv = dev->dev_private; > + struct drm_mm_node *node; > + unsigned long hole_start, hole_end, size; > + > + if (dev_priv->mm.stolen_base == 0) > + return 0; > + > + if (dev_priv->cfb_size) > + return dev_priv->cfb_size; > + > + /* Try to set up FBC with a reasonable compressed buffer size */ > + size = 0; > + drm_mm_for_each_hole(node, &dev_priv->mm.stolen, hole_start, hole_end) { > + unsigned long hole_size = hole_end - hole_start; > + if (hole_size > size) > + size = hole_size; > + } > + > + /* Try to get a 32M buffer... */ > + if (size > (36*1024*1024)) > + size = 32*1024*1024; > + else /* fall back to 3/4 of the stolen space */ > + size = size * 3 / 4; > + > + return i915_setup_compression(dev, size); > } > > static void i915_cleanup_compression(struct drm_device *dev) > { > struct drm_i915_private *dev_priv = dev->dev_private; > > - drm_mm_put_block(dev_priv->compressed_fb); > + if (dev_priv->compressed_fb) > + drm_mm_put_block(dev_priv->compressed_fb); > + > if (dev_priv->compressed_llb) > drm_mm_put_block(dev_priv->compressed_llb); > + > + dev_priv->cfb_size = 0; > } > > void i915_gem_cleanup_stolen(struct drm_device *dev) > { > - if (I915_HAS_FBC(dev) && i915_powersave) > - i915_cleanup_compression(dev); > + i915_cleanup_compression(dev); > } > > int i915_gem_init_stolen(struct drm_device *dev) > { > struct drm_i915_private *dev_priv = dev->dev_private; > - unsigned long prealloc_size = dev_priv->mm.gtt->stolen_size; > > dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); > if (dev_priv->mm.stolen_base == 0) > @@ -180,21 +194,7 @@ int i915_gem_init_stolen(struct drm_device *dev) > dev_priv->mm.gtt->stolen_size, dev_priv->mm.stolen_base); > > /* Basic memrange allocator for stolen space */ > - drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size); > - > - /* Try to set up FBC with a reasonable compressed buffer size */ > - if (I915_HAS_FBC(dev) && i915_powersave) { > - int cfb_size; > - > - /* Leave 1M for line length buffer & misc. */ > - > - /* Try to get a 32M buffer... */ > - if (prealloc_size > (36*1024*1024)) > - cfb_size = 32*1024*1024; > - else /* fall back to 7/8 of the stolen space */ > - cfb_size = prealloc_size * 7 / 8; > - i915_setup_compression(dev, cfb_size); > - } > + drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->mm.gtt->stolen_size); > > return 0; > } > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c > index 778cbb8..221d035 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -7231,6 +7231,9 @@ void intel_modeset_init(struct drm_device *dev) > /* Just disable it once at startup */ > i915_disable_vga(dev); > intel_setup_outputs(dev); > + > + /* Just in case the BIOS is doing something questionable. */ > + intel_disable_fbc(dev); > } > > void intel_modeset_gem_init(struct drm_device *dev) Assuming you actually call this function in a later patch: Reviewed-by: Jesse Barnes -- Jesse Barnes, Intel Open Source Technology Center