From 9483d9ae09452ad4cdf7f0bb0c0fae2775278c85 Mon Sep 17 00:00:00 2001 From: Sinan Kaya Date: Fri, 21 Oct 2016 12:37:57 -0400 Subject: dmaengine: qcom_hidma: bring out interrupt cause 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 Signed-off-by: Vinod Koul --- drivers/dma/qcom/hidma_ll.c | 62 ++++++++++++++++++++++++--------------------- 1 file changed, 33 insertions(+), 29 deletions(-) (limited to 'drivers/dma/qcom') diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c index 114409e7eec1..9193f466c9e7 100644 --- a/drivers/dma/qcom/hidma_ll.c +++ b/drivers/dma/qcom/hidma_ll.c @@ -418,12 +418,24 @@ static int hidma_ll_reset(struct hidma_lldev *lldev) * 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... @@ -432,35 +444,28 @@ 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, 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); - 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 @@ -471,7 +476,6 @@ irqreturn_t hidma_ll_inthandler(int chirq, void *arg) cause = status & enable; } -out: return IRQ_HANDLED; } -- cgit v1.2.3