From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Widawsky Subject: [PATCH 07/10] drm/i915: Calculate correct stolen size for GEN7+ Date: Mon, 22 Oct 2012 18:34:12 -0700 Message-ID: <1350956055-3224-8-git-send-email-ben@bwidawsk.net> References: <1350956055-3224-1-git-send-email-ben@bwidawsk.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from shiva.chad-versace.us (209-20-75-48.static.cloud-ips.com [209.20.75.48]) by gabe.freedesktop.org (Postfix) with ESMTP id ACC5C9E776 for ; Mon, 22 Oct 2012 18:34:41 -0700 (PDT) In-Reply-To: <1350956055-3224-1-git-send-email-ben@bwidawsk.net> 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: intel-gfx@lists.freedesktop.org Cc: Ben Widawsky List-Id: intel-gfx@lists.freedesktop.org This bug existed in the old code, but was easier to fix here in the rework. Unfortunately gen7 doesn't have a nice way to figure out the size and we must use a lookup table. Signed-off-by: Ben Widawsky --- drivers/gpu/drm/i915/i915_gem_gtt.c | 14 +++++++++++++- drivers/gpu/drm/i915/i915_reg.h | 2 ++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 7d3ec42..16fe960 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -528,6 +528,15 @@ static inline unsigned int gen6_get_stolen_size(u16 snb_gmch_ctl) return snb_gmch_ctl << 25; /* 32 MB units */ } +static inline unsigned int gen7_get_stolen_size(u16 snb_gmch_ctl) +{ + static const int stolen_decoder[] = { + 0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352}; + snb_gmch_ctl >>= IVB_GMCH_GMS_SHIFT; + snb_gmch_ctl &= IVB_GMCH_GMS_MASK; + return stolen_decoder[snb_gmch_ctl] << 20; +} + int i915_gem_gtt_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -575,7 +584,10 @@ int i915_gem_gtt_init(struct drm_device *dev) pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &snb_gmch_ctl); dev_priv->mm.gtt->gtt_total_entries = gen6_get_total_gtt_size(snb_gmch_ctl) / sizeof(gtt_pte_t); - dev_priv->mm.gtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl); + if (INTEL_INFO(dev)->gen < 7) + dev_priv->mm.gtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl); + else + dev_priv->mm.gtt->stolen_size = gen7_get_stolen_size(snb_gmch_ctl); ret = setup_scratch_page(dev); if (ret) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 10a6e9b..1d54328 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -45,6 +45,8 @@ #define SNB_GMCH_GGMS_MASK 0x3 #define SNB_GMCH_GMS_SHIFT 3 /* Graphics Mode Select */ #define SNB_GMCH_GMS_MASK 0x1f +#define IVB_GMCH_GMS_SHIFT 4 +#define IVB_GMCH_GMS_MASK 0xf /* PCI config space */ -- 1.7.12.4