From patchwork Tue Mar 8 11:38:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: arun.siluvery@linux.intel.com X-Patchwork-Id: 8532581 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B5928C0553 for ; Tue, 8 Mar 2016 11:38:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B4C62200ED for ; Tue, 8 Mar 2016 11:38:36 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 98BB7201D3 for ; Tue, 8 Mar 2016 11:38:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1A58D6E65F; Tue, 8 Mar 2016 11:38:33 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTP id 2E2126E01C for ; Tue, 8 Mar 2016 11:38:28 +0000 (UTC) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga102.fm.intel.com with ESMTP; 08 Mar 2016 03:38:29 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,556,1449561600"; d="scan'208";a="904858146" Received: from asiluver-linux.isw.intel.com ([10.102.226.117]) by orsmga001.jf.intel.com with ESMTP; 08 Mar 2016 03:38:26 -0800 From: Arun Siluvery To: intel-gfx@lists.freedesktop.org Date: Tue, 8 Mar 2016 11:38:18 +0000 Message-Id: <1457437098-21689-3-git-send-email-arun.siluvery@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1457437098-21689-1-git-send-email-arun.siluvery@linux.intel.com> References: <1457437098-21689-1-git-send-email-arun.siluvery@linux.intel.com> Cc: Mika Kuoppala Subject: [Intel-gfx] [PATCH v2 2/2] drm/i915/guc: Reset GuC and retry on firmware load failure X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.2 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 Due to timing issues in the HW some of the status bits required for GuC authentication doesn't get set occassionally, when that happens, GuC cannot be initialized and we will be left with a wedged GPU. The WA suggested is to perform a soft reset of GuC and attempt to reload the fw again for few times before giving up. As the failure is dependent on timing, tests performed by triggering manual full gpu reset (i915_wedged) showed that we could sometimes hit this after several thousand iterations but sometimes tests ran even longer without any issues. Reset and reload mechanism proved helpful when we indeed hit fw load failure so it is better to include this to improve driver stability. This change implements the following WA, WaEnableuKernelHeaderValidFix:skl,bxt WaEnableGuCBootHashCheckNotSet:skl,bxt Cc: Dave Gordon Cc: Alex Dai Signed-off-by: Arun Siluvery --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_guc_reg.h | 1 + drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_guc_loader.c | 49 +++++++++++++++++++++++++++++++-- drivers/gpu/drm/i915/intel_uncore.c | 19 +++++++++++++ 5 files changed, 69 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index f37ac12..0df7c82 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2757,6 +2757,7 @@ extern long i915_compat_ioctl(struct file *filp, unsigned int cmd, extern int intel_gpu_reset(struct drm_device *dev); extern bool intel_has_gpu_reset(struct drm_device *dev); extern int i915_reset(struct drm_device *dev); +extern int intel_guc_reset(struct drm_i915_private *dev_priv); extern unsigned long i915_chipset_val(struct drm_i915_private *dev_priv); extern unsigned long i915_mch_val(struct drm_i915_private *dev_priv); extern unsigned long i915_gfx_val(struct drm_i915_private *dev_priv); diff --git a/drivers/gpu/drm/i915/i915_guc_reg.h b/drivers/gpu/drm/i915/i915_guc_reg.h index e4ba582..94ceee5 100644 --- a/drivers/gpu/drm/i915/i915_guc_reg.h +++ b/drivers/gpu/drm/i915/i915_guc_reg.h @@ -27,6 +27,7 @@ /* Definitions of GuC H/W registers, bits, etc */ #define GUC_STATUS _MMIO(0xc000) +#define GS_MIA_IN_RESET (1 << 0) #define GS_BOOTROM_SHIFT 1 #define GS_BOOTROM_MASK (0x7F << GS_BOOTROM_SHIFT) #define GS_BOOTROM_RSA_FAILED (0x50 << GS_BOOTROM_SHIFT) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 7dfc400..48a23de 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -164,6 +164,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg) #define GEN6_GRDOM_RENDER (1 << 1) #define GEN6_GRDOM_MEDIA (1 << 2) #define GEN6_GRDOM_BLT (1 << 3) +#define GEN9_GRDOM_GUC (1 << 5) #define RING_PP_DIR_BASE(ring) _MMIO((ring)->mmio_base+0x228) #define RING_PP_DIR_BASE_READ(ring) _MMIO((ring)->mmio_base+0x518) diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c index 82a3c03..f9cb814 100644 --- a/drivers/gpu/drm/i915/intel_guc_loader.c +++ b/drivers/gpu/drm/i915/intel_guc_loader.c @@ -353,6 +353,24 @@ static int guc_ucode_xfer(struct drm_i915_private *dev_priv) return ret; } +static int i915_reset_guc(struct drm_i915_private *dev_priv) +{ + int ret; + u32 guc_status; + + ret = intel_guc_reset(dev_priv); + if (ret) { + DRM_ERROR("GuC reset failed, ret = %d\n", ret); + return ret; + } + + guc_status = I915_READ(GUC_STATUS); + WARN(!(guc_status & GS_MIA_IN_RESET), + "GuC status: 0x%x, MIA core expected to be in reset\n", guc_status); + + return ret; +} + /** * intel_guc_ucode_load() - load GuC uCode into the device * @dev: drm device @@ -417,9 +435,36 @@ int intel_guc_ucode_load(struct drm_device *dev) if (err) goto fail; + /* + * WaEnableuKernelHeaderValidFix:skl,bxt + * For BXT, this is only upto B0 but below WA is required for later + * steppings also so this is extended as well. + */ + /* WaEnableGuCBootHashCheckNotSet:skl,bxt */ err = guc_ucode_xfer(dev_priv); - if (err) - goto fail; + if (err) { + int retries = 3; + + DRM_ERROR("GuC fw load failed, err=%d, attempting reset and retry\n", err); + + while (retries--) { + err = i915_reset_guc(dev_priv); + if (err) + break; + + err = guc_ucode_xfer(dev_priv); + if (!err) { + DRM_DEBUG_DRIVER("GuC fw reload succeeded after reset\n"); + break; + } + DRM_DEBUG_DRIVER("GuC fw reload retries left: %d\n", retries); + } + + if (err) { + DRM_ERROR("GuC fw reload attempt failed, ret=%d\n", err); + goto fail; + } + } guc_fw->guc_fw_load_status = GUC_FIRMWARE_SUCCESS; diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 80e38d5..92be76a 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -1647,6 +1647,25 @@ bool intel_has_gpu_reset(struct drm_device *dev) return intel_get_gpu_reset(dev) != NULL; } +int intel_guc_reset(struct drm_i915_private *dev_priv) +{ + int ret; + unsigned long irqflags; + + if (!i915.enable_guc_submission) + return -EINVAL; + + intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); + spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); + + ret = gen6_domain_reset(dev_priv, GEN9_GRDOM_GUC); + + spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); + intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); + + return ret; +} + bool intel_uncore_unclaimed_mmio(struct drm_i915_private *dev_priv) { return check_for_unclaimed_mmio(dev_priv);