From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756171AbcJGFhY (ORCPT ); Fri, 7 Oct 2016 01:37:24 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:33375 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752294AbcJGFgk (ORCPT ); Fri, 7 Oct 2016 01:36:40 -0400 DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 0B8C661AC2 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=okaya@codeaurora.org From: Sinan Kaya To: dmaengine@vger.kernel.org, timur@codeaurora.org, devicetree@vger.kernel.org, cov@codeaurora.org, vinod.koul@intel.com, jcm@redhat.com Cc: agross@codeaurora.org, arnd@arndb.de, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Sinan Kaya , Dan Williams , linux-kernel@vger.kernel.org Subject: [PATCH V5 06/10] dmaengine: qcom_hidma: bring out interrupt cause Date: Fri, 7 Oct 2016 01:25:11 -0400 Message-Id: <1475817915-11976-7-git-send-email-okaya@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1475817915-11976-1-git-send-email-okaya@codeaurora.org> References: <1475817915-11976-1-git-send-email-okaya@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Bring out the interrupt cause to the top level so that MSI interrupts can be hooked at a later stage. Signed-off-by: Sinan Kaya --- drivers/dma/qcom/hidma_ll.c | 57 ++++++++++++++++++++++++++------------------- 1 file changed, 33 insertions(+), 24 deletions(-) diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c index a4fc941..015df4b 100644 --- a/drivers/dma/qcom/hidma_ll.c +++ b/drivers/dma/qcom/hidma_ll.c @@ -432,12 +432,24 @@ static void hidma_ll_abort(unsigned long arg) * requests traditionally to the destination, this concept does not apply * here for this HW. */ -irqreturn_t hidma_ll_inthandler(int chirq, void *arg) +static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause) { - struct hidma_lldev *lldev = arg; - u32 status; - u32 enable; - u32 cause; + if (cause & HIDMA_ERR_INT_MASK) { + dev_err(lldev->dev, "error 0x%x, disabling...\n", + cause); + + /* Clear out pending interrupts */ + writel(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG); + + /* No further submissions. */ + hidma_ll_disable(lldev); + + /* Driver completes the txn and intimates the client.*/ + hidma_cleanup_pending_tre(lldev, 0xFF, + HIDMA_EVRE_STATUS_ERROR); + + return; + } /* * Fine tuned for this HW... @@ -446,30 +458,28 @@ irqreturn_t hidma_ll_inthandler(int chirq, void *arg) * read and write accessors are used for performance reasons due to * interrupt delivery guarantees. Do not copy this code blindly and * expect that to work. + * + * Try to consume as many EVREs as possible. */ + hidma_handle_tre_completion(lldev); + + /* We consumed TREs or there are pending TREs or EVREs. */ + writel_relaxed(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG); +} + +irqreturn_t hidma_ll_inthandler(int chirq, void *arg) +{ + struct hidma_lldev *lldev = arg; + u32 status; + u32 enable; + u32 cause; + status = readl_relaxed(lldev->evca + HIDMA_EVCA_IRQ_STAT_REG); enable = readl_relaxed(lldev->evca + HIDMA_EVCA_IRQ_EN_REG); cause = status & enable; while (cause) { - if (cause & HIDMA_ERR_INT_MASK) { - dev_err(lldev->dev, "error 0x%x, resetting...\n", - cause); - - /* Clear out pending interrupts */ - writel(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG); - - tasklet_schedule(&lldev->rst_task); - goto out; - } - - /* - * Try to consume as many EVREs as possible. - */ - hidma_handle_tre_completion(lldev); - - /* We consumed TREs or there are pending TREs or EVREs. */ - writel_relaxed(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG); + hidma_ll_int_handler_internal(lldev, cause); /* * Another interrupt might have arrived while we are @@ -480,7 +490,6 @@ irqreturn_t hidma_ll_inthandler(int chirq, void *arg) cause = status & enable; } -out: return IRQ_HANDLED; } -- 1.9.1