From patchwork Mon Mar 31 12:10:44 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Imre Deak X-Patchwork-Id: 3913921 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 052209F370 for ; Mon, 31 Mar 2014 12:12:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0EDE0203AC for ; Mon, 31 Mar 2014 12:12:13 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id D3B0E20386 for ; Mon, 31 Mar 2014 12:12:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F3B386E25E; Mon, 31 Mar 2014 05:12:10 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 1D25D6E25F for ; Mon, 31 Mar 2014 05:12:10 -0700 (PDT) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP; 31 Mar 2014 05:06:07 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,764,1389772800"; d="scan'208";a="503476429" Received: from intelbox.fi.intel.com (HELO localhost) ([10.237.72.105]) by fmsmga001.fm.intel.com with ESMTP; 31 Mar 2014 05:10:45 -0700 From: Imre Deak To: intel-gfx@lists.freedesktop.org Date: Mon, 31 Mar 2014 15:10:44 +0300 Message-Id: <1396267844-9235-1-git-send-email-imre.deak@intel.com> X-Mailer: git-send-email 1.8.4 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH] drm/i915: vlv: reserve the GT power context only once during driver init X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Atm we reserve/allocate and free the power context during GT power enable/disable time. There is no need to do this, we can reserve/allocate the buffer once during driver loading and free it during driver cleanup. The re-reservation can also fail in case the driver previously manages to allocate something on the given fixed address. The buffer isn't exepected to move even if allocated by the BIOS, for safety add an assert to check this assumption. This also fixed a bug for Ville, where re-reserving the context failed during a GPU reset (I assume because something else got allocated on its fixed address). Tested-by: Ville Syrjälä Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä --- drivers/gpu/drm/i915/intel_display.c | 8 +++++++ drivers/gpu/drm/i915/intel_drv.h | 2 ++ drivers/gpu/drm/i915/intel_pm.c | 41 ++++++++++++++++++++++++++++++------ 3 files changed, 44 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index ecc01f5..0684215 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11759,6 +11759,10 @@ void intel_modeset_gem_init(struct drm_device *dev) struct drm_crtc *c; struct intel_framebuffer *fb; + mutex_lock(&dev->struct_mutex); + intel_init_gt_powersave(dev); + mutex_unlock(&dev->struct_mutex); + intel_modeset_init_hw(dev); intel_setup_overlay(dev); @@ -11845,6 +11849,10 @@ void intel_modeset_cleanup(struct drm_device *dev) drm_mode_config_cleanup(dev); intel_cleanup_overlay(dev); + + mutex_lock(&dev->struct_mutex); + intel_cleanup_gt_powersave(dev); + mutex_unlock(&dev->struct_mutex); } /* diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 9002e77..7b21571 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -897,6 +897,8 @@ void intel_display_power_get(struct drm_i915_private *dev_priv, void intel_display_power_put(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain); void intel_power_domains_init_hw(struct drm_i915_private *dev_priv); +void intel_init_gt_powersave(struct drm_device *dev); +void intel_cleanup_gt_powersave(struct drm_device *dev); void intel_enable_gt_powersave(struct drm_device *dev); void intel_disable_gt_powersave(struct drm_device *dev); void ironlake_teardown_rc6(struct drm_device *dev); diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 8482a5b..1095b3e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3201,11 +3201,6 @@ static void valleyview_disable_rps(struct drm_device *dev) I915_WRITE(GEN6_RC_CONTROL, 0); gen6_disable_rps_interrupts(dev); - - if (dev_priv->vlv_pctx) { - drm_gem_object_unreference(&dev_priv->vlv_pctx->base); - dev_priv->vlv_pctx = NULL; - } } static void intel_print_rc6_info(struct drm_device *dev, u32 mode) @@ -3549,6 +3544,15 @@ int valleyview_rps_min_freq(struct drm_i915_private *dev_priv) return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff; } +/* Check that the pctx buffer wasn't move under us. */ +static void valleyview_check_pctx(struct drm_i915_private *dev_priv) +{ + unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095; + + WARN_ON(pctx_addr != dev_priv->mm.stolen_base + + dev_priv->vlv_pctx->stolen->start); +} + static void valleyview_setup_pctx(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -3593,6 +3597,17 @@ out: dev_priv->vlv_pctx = pctx; } +static void valleyview_cleanup_pctx(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (WARN_ON(!dev_priv->vlv_pctx)) + return; + + drm_gem_object_unreference(&dev_priv->vlv_pctx->base); + dev_priv->vlv_pctx = NULL; +} + static void valleyview_enable_rps(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -3602,6 +3617,8 @@ static void valleyview_enable_rps(struct drm_device *dev) WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock)); + valleyview_check_pctx(dev_priv); + if ((gtfifodbg = I915_READ(GTFIFODBG))) { DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n", gtfifodbg); @@ -4418,6 +4435,18 @@ static void intel_init_emon(struct drm_device *dev) dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK); } +void intel_init_gt_powersave(struct drm_device *dev) +{ + if (IS_VALLEYVIEW(dev)) + valleyview_setup_pctx(dev); +} + +void intel_cleanup_gt_powersave(struct drm_device *dev) +{ + if (IS_VALLEYVIEW(dev)) + valleyview_cleanup_pctx(dev); +} + void intel_disable_gt_powersave(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -4472,8 +4501,6 @@ void intel_enable_gt_powersave(struct drm_device *dev) ironlake_enable_rc6(dev); intel_init_emon(dev); } else if (IS_GEN6(dev) || IS_GEN7(dev)) { - if (IS_VALLEYVIEW(dev)) - valleyview_setup_pctx(dev); /* * PCU communication is slow and this doesn't need to be * done at any specific time, so do this out of our fast path