From patchwork Fri Jun 10 13:36:22 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: akash.goel@intel.com X-Patchwork-Id: 9169791 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5010960573 for ; Fri, 10 Jun 2016 13:23:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3FF5F2835E for ; Fri, 10 Jun 2016 13:23:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3437728366; Fri, 10 Jun 2016 13:23:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8B1062835E for ; Fri, 10 Jun 2016 13:23:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B92E46ED42; Fri, 10 Jun 2016 13:23:26 +0000 (UTC) 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 55A2F6ED1D for ; Fri, 10 Jun 2016 13:23:24 +0000 (UTC) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP; 10 Jun 2016 06:23:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,449,1459839600"; d="scan'208";a="825506993" Received: from akashgoe-desktop.iind.intel.com ([10.223.82.36]) by orsmga003.jf.intel.com with ESMTP; 10 Jun 2016 06:23:23 -0700 From: akash.goel@intel.com To: intel-gfx@lists.freedesktop.org Date: Fri, 10 Jun 2016 19:06:22 +0530 Message-Id: <1465565789-30570-5-git-send-email-akash.goel@intel.com> X-Mailer: git-send-email 1.9.2 In-Reply-To: <1465565789-30570-1-git-send-email-akash.goel@intel.com> References: <1465565789-30570-1-git-send-email-akash.goel@intel.com> Cc: sourab.gupta@intel.com, Akash Goel Subject: [Intel-gfx] [PATCH 04/11] drm/i915: Support for GuC interrupts 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-Virus-Scanned: ClamAV using ClamSMTP From: Sagar Arun Kamble There are certain types of interrupts which Host can recieve from GuC. GuC ukernel sends an interrupt to Host for certain events, like for example retrieve/consume the logs generated by ukernel. This patch adds support to receive interrupts from GuC but currently enables & partially handles only the interrupt sent by GuC ukernel. Future patches will add support for handling other interrupt types. v2: Use common low level routines for PM IER/IIR programming (Chris) Rename interrupt functions to gen9_xxx from gen8_xxx (Chris) Replace disabling of wake ref asserts with rpm get/put (Chris) Signed-off-by: Sagar Arun Kamble Signed-off-by: Akash Goel --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_guc_submission.c | 5 ++ drivers/gpu/drm/i915/i915_irq.c | 95 ++++++++++++++++++++++++++++-- drivers/gpu/drm/i915/i915_reg.h | 11 ++++ drivers/gpu/drm/i915/intel_drv.h | 3 + drivers/gpu/drm/i915/intel_guc.h | 5 ++ drivers/gpu/drm/i915/intel_guc_loader.c | 4 ++ 7 files changed, 120 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 021dbe5..18947ba 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1791,6 +1791,7 @@ struct drm_i915_private { u32 pm_irq_mask; u32 pm_ier_mask; u32 pm_rps_events; + u32 guc_events; u32 pipestat_irq_mask[I915_MAX_PIPES]; struct i915_hotplug hotplug; diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c index da7c242..ad7b409 100644 --- a/drivers/gpu/drm/i915/i915_guc_submission.c +++ b/drivers/gpu/drm/i915/i915_guc_submission.c @@ -990,6 +990,8 @@ int intel_guc_suspend(struct drm_device *dev) if (guc->guc_fw.guc_fw_load_status != GUC_FIRMWARE_SUCCESS) return 0; + gen9_disable_guc_interrupts(dev_priv); + ctx = dev_priv->kernel_context; data[0] = HOST2GUC_ACTION_ENTER_S_STATE; @@ -1016,6 +1018,9 @@ int intel_guc_resume(struct drm_device *dev) if (guc->guc_fw.guc_fw_load_status != GUC_FIRMWARE_SUCCESS) return 0; + if (i915.guc_log_level >= 0) + gen9_enable_guc_interrupts(dev_priv); + ctx = dev_priv->kernel_context; data[0] = HOST2GUC_ACTION_EXIT_S_STATE; diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 330d87b..4797bb3 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -170,6 +170,7 @@ static void gen5_assert_iir_is_zero(struct drm_i915_private *dev_priv, } while (0) static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir); +static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir); /* For display hotplug interrupt */ static inline void @@ -434,6 +435,42 @@ void gen6_disable_rps_interrupts(struct drm_i915_private *dev_priv) synchronize_irq(dev_priv->dev->irq); } +void gen9_reset_guc_interrupts(struct drm_i915_private *dev_priv) +{ + spin_lock_irq(&dev_priv->irq_lock); + gen6_reset_pm_interrupts(dev_priv, dev_priv->guc_events); + spin_unlock_irq(&dev_priv->irq_lock); +} + +void gen9_enable_guc_interrupts(struct drm_i915_private *dev_priv) +{ + spin_lock_irq(&dev_priv->irq_lock); + if (!dev_priv->guc.interrupts_enabled) { + WARN_ON(I915_READ(gen6_pm_iir(dev_priv)) & + dev_priv->guc_events); + dev_priv->guc.interrupts_enabled = true; + gen6_enable_pm_interrupts(dev_priv, dev_priv->guc_events); + } + spin_unlock_irq(&dev_priv->irq_lock); +} + +void gen9_disable_guc_interrupts(struct drm_i915_private *dev_priv) +{ + spin_lock_irq(&dev_priv->irq_lock); + dev_priv->guc.interrupts_enabled = false; + spin_unlock_irq(&dev_priv->irq_lock); + + cancel_work_sync(&dev_priv->guc.events_work); + + spin_lock_irq(&dev_priv->irq_lock); + + gen6_disable_pm_interrupts(dev_priv, dev_priv->guc_events); + + spin_unlock_irq(&dev_priv->irq_lock); + + synchronize_irq(dev_priv->dev->irq); +} + /** * bdw_update_port_irq - update DE port interrupt * @dev_priv: driver private @@ -1208,6 +1245,33 @@ out: ENABLE_RPM_WAKEREF_ASSERTS(dev_priv); } +static void gen9_guc2host_events_work(struct work_struct *work) +{ + struct drm_i915_private *dev_priv = + container_of(work, struct drm_i915_private, guc.events_work); + + spin_lock_irq(&dev_priv->irq_lock); + /* Speed up work cancelation during disabling guc interrupts. */ + if (!dev_priv->guc.interrupts_enabled) { + spin_unlock_irq(&dev_priv->irq_lock); + return; + } + + /* Though this work item gets synced during rpm suspend, but still need + * a rpm get/put to avoid the warning, as it could get executed in a + * window, where rpm ref count has dropped to zero but rpm suspend has + * not kicked in. Generally device is expected to be active only at this + * time so get/put should be really quick. + */ + intel_runtime_pm_get(dev_priv); + + gen6_enable_pm_irq(dev_priv, GEN9_GUC_TO_HOST_INT_EVENT); + spin_unlock_irq(&dev_priv->irq_lock); + + /* TODO: Handle the events for which GuC interrupted host */ + + intel_runtime_pm_put(dev_priv); +} /** * ivybridge_parity_work - Workqueue called when a parity error interrupt @@ -1383,11 +1447,13 @@ static irqreturn_t gen8_gt_irq_ack(struct drm_i915_private *dev_priv, DRM_ERROR("The master control interrupt lied (GT3)!\n"); } - if (master_ctl & GEN8_GT_PM_IRQ) { + if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) { gt_iir[2] = I915_READ_FW(GEN8_GT_IIR(2)); - if (gt_iir[2] & dev_priv->pm_rps_events) { + if (gt_iir[2] & (dev_priv->pm_rps_events | + dev_priv->guc_events)) { I915_WRITE_FW(GEN8_GT_IIR(2), - gt_iir[2] & dev_priv->pm_rps_events); + gt_iir[2] & (dev_priv->pm_rps_events | + dev_priv->guc_events)); ret = IRQ_HANDLED; } else DRM_ERROR("The master control interrupt lied (PM)!\n"); @@ -1419,6 +1485,9 @@ static void gen8_gt_irq_handler(struct drm_i915_private *dev_priv, if (gt_iir[2] & dev_priv->pm_rps_events) gen6_rps_irq_handler(dev_priv, gt_iir[2]); + + if (gt_iir[2] & dev_priv->guc_events) + gen9_guc_irq_handler(dev_priv, gt_iir[2]); } static bool bxt_port_hotplug_long_detect(enum port port, u32 val) @@ -1665,6 +1734,20 @@ static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir) } } +static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 gt_iir) +{ + if (gt_iir & GEN9_GUC_TO_HOST_INT_EVENT) { + spin_lock(&dev_priv->irq_lock); + if (dev_priv->guc.interrupts_enabled) { + /* Process all the GuC to Host events in bottom half */ + gen6_disable_pm_irq(dev_priv, + GEN9_GUC_TO_HOST_INT_EVENT); + queue_work(dev_priv->wq, &dev_priv->guc.events_work); + } + spin_unlock(&dev_priv->irq_lock); + } +} + static bool intel_pipe_handle_vblank(struct drm_i915_private *dev_priv, enum pipe pipe) { @@ -3820,7 +3903,7 @@ static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv) GEN8_IRQ_INIT_NDX(GT, 1, ~gt_interrupts[1], gt_interrupts[1]); /* * RPS interrupts will get enabled/disabled on demand when RPS itself - * is enabled/disabled. + * is enabled/disabled. Same wil be the case for GuC interrupts. */ GEN8_IRQ_INIT_NDX(GT, 2, dev_priv->pm_irq_mask, 0); GEN8_IRQ_INIT_NDX(GT, 3, ~gt_interrupts[3], gt_interrupts[3]); @@ -4605,6 +4688,10 @@ void intel_irq_init(struct drm_i915_private *dev_priv) INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work); INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work); + INIT_WORK(&dev_priv->guc.events_work, gen9_guc2host_events_work); + + if (HAS_GUC_UCODE(dev)) + dev_priv->guc_events = GEN9_GUC_TO_HOST_INT_EVENT; /* Let's track the enabled rps events */ if (IS_VALLEYVIEW(dev_priv)) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index e307725..087c043 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -5922,6 +5922,7 @@ enum skl_disp_power_wells { #define GEN8_DE_PIPE_A_IRQ (1<<16) #define GEN8_DE_PIPE_IRQ(pipe) (1<<(16+(pipe))) #define GEN8_GT_VECS_IRQ (1<<6) +#define GEN8_GT_GUC_IRQ (1<<5) #define GEN8_GT_PM_IRQ (1<<4) #define GEN8_GT_VCS2_IRQ (1<<3) #define GEN8_GT_VCS1_IRQ (1<<2) @@ -5933,6 +5934,16 @@ enum skl_disp_power_wells { #define GEN8_GT_IIR(which) _MMIO(0x44308 + (0x10 * (which))) #define GEN8_GT_IER(which) _MMIO(0x4430c + (0x10 * (which))) +#define GEN9_GUC_TO_HOST_INT_EVENT (1<<31) +#define GEN9_GUC_EXEC_ERROR_EVENT (1<<30) +#define GEN9_GUC_DISPLAY_EVENT (1<<29) +#define GEN9_GUC_SEMA_SIGNAL_EVENT (1<<28) +#define GEN9_GUC_IOMMU_MSG_EVENT (1<<27) +#define GEN9_GUC_DB_RING_EVENT (1<<26) +#define GEN9_GUC_DMA_DONE_EVENT (1<<25) +#define GEN9_GUC_FATAL_ERROR_EVENT (1<<24) +#define GEN9_GUC_NOTIFICATION_EVENT (1<<23) + #define GEN8_RCS_IRQ_SHIFT 0 #define GEN8_BCS_IRQ_SHIFT 16 #define GEN8_VCS1_IRQ_SHIFT 0 diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 2dae2e5..b4e1753 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1081,6 +1081,9 @@ void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv, unsigned int pipe_mask); void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv, unsigned int pipe_mask); +void gen9_reset_guc_interrupts(struct drm_i915_private *dev_priv); +void gen9_enable_guc_interrupts(struct drm_i915_private *dev_priv); +void gen9_disable_guc_interrupts(struct drm_i915_private *dev_priv); /* intel_crt.c */ void intel_crt_init(struct drm_device *dev); diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h index 41601c7..e20792d 100644 --- a/drivers/gpu/drm/i915/intel_guc.h +++ b/drivers/gpu/drm/i915/intel_guc.h @@ -125,6 +125,11 @@ struct intel_guc { struct intel_guc_fw guc_fw; uint32_t log_flags; struct drm_i915_gem_object *log_obj; + /* + * work, interrupts_enabled are protected by dev_priv->irq_lock + */ + struct work_struct events_work; + bool interrupts_enabled; struct drm_i915_gem_object *ads_obj; diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c index fdaeed8..f5ef136 100644 --- a/drivers/gpu/drm/i915/intel_guc_loader.c +++ b/drivers/gpu/drm/i915/intel_guc_loader.c @@ -433,6 +433,7 @@ int intel_guc_setup(struct drm_device *dev) } direct_interrupts_to_host(dev_priv); + gen9_reset_guc_interrupts(dev_priv); guc_fw->guc_fw_load_status = GUC_FIRMWARE_PENDING; @@ -479,6 +480,9 @@ int intel_guc_setup(struct drm_device *dev) intel_guc_fw_status_repr(guc_fw->guc_fw_load_status)); if (i915.enable_guc_submission) { + if (i915.guc_log_level >= 0) + gen9_enable_guc_interrupts(dev_priv); + /* The execbuf_client will be recreated. Release it first. */ i915_guc_submission_disable(dev);