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Groups > linux.kernel > #1694411

[PATCH V3 2/3] iommu/rockchip: add multi irqs support

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RK3368 vpu mmu have two irqs, this patch support multi irqs

Signed-off-by: Simon Xue <xxm@rock-chips.com>
---
changes since V2:
use platform_irq_count to get irq nums

 drivers/iommu/rockchip-iommu.c | 35 ++++++++++++++++++++++++++---------
 1 file changed, 26 insertions(+), 9 deletions(-)

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 4ba48a2..e2852b0 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -90,7 +90,8 @@ struct rk_iommu {
 	struct device *dev;
 	void __iomem **bases;
 	int num_mmu;
-	int irq;
+	int *irq;
+	int num_irq;
 	struct iommu_device iommu;
 	struct list_head node; /* entry in rk_iommu_domain.iommus */
 	struct iommu_domain *domain; /* domain to which iommu is attached */
@@ -825,10 +826,12 @@ static int rk_iommu_attach_device(struct iommu_domain *domain,
 
 	iommu->domain = domain;
 
-	ret = devm_request_irq(iommu->dev, iommu->irq, rk_iommu_irq,
-			       IRQF_SHARED, dev_name(dev), iommu);
-	if (ret)
-		return ret;
+	for (i = 0; i < iommu->num_irq; i++) {
+		ret = devm_request_irq(iommu->dev, iommu->irq[i], rk_iommu_irq,
+				       IRQF_SHARED, dev_name(dev), iommu);
+		if (ret)
+			return ret;
+	}
 
 	for (i = 0; i < iommu->num_mmu; i++) {
 		rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR,
@@ -878,7 +881,8 @@ static void rk_iommu_detach_device(struct iommu_domain *domain,
 	}
 	rk_iommu_disable_stall(iommu);
 
-	devm_free_irq(iommu->dev, iommu->irq, iommu);
+	for (i = 0; i < iommu->num_irq; i++)
+		devm_free_irq(iommu->dev, iommu->irq[i], iommu);
 
 	iommu->domain = NULL;
 
@@ -1157,10 +1161,23 @@ static int rk_iommu_probe(struct platform_device *pdev)
 	if (iommu->num_mmu == 0)
 		return PTR_ERR(iommu->bases[0]);
 
-	iommu->irq = platform_get_irq(pdev, 0);
-	if (iommu->irq < 0) {
-		dev_err(dev, "Failed to get IRQ, %d\n", iommu->irq);
+	iommu->num_irq = platform_irq_count(pdev);
+	if (iommu->num_irq < 0)
+		return iommu->num_irq;
+	if (iommu->num_irq == 0)
 		return -ENXIO;
+
+	iommu->irq = devm_kcalloc(dev, iommu->num_irq, sizeof(*iommu->irq),
+				  GFP_KERNEL);
+	if (!iommu->irq)
+		return -ENOMEM;
+
+	for (i = 0; i < iommu->num_irq; i++) {
+		iommu->irq[i] = platform_get_irq(pdev, i);
+		if (iommu->irq[i] < 0) {
+			dev_err(dev, "Failed to get IRQ, %d\n", iommu->irq[i]);
+			return -ENXIO;
+		}
 	}
 
 	err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev));
-- 
1.9.1

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[PATCH V3 1/3] Docs: dt: rockchip: add rockchip,disable-mmu-reset property Simon Xue <xxm@rock-chips.com> - 2017-07-24 04:40 +0200
  [PATCH V3 2/3] iommu/rockchip: add multi irqs support Simon Xue <xxm@rock-chips.com> - 2017-07-24 04:40 +0200
  [PATCH V3 3/3] iommu/rockchip: ignore isp mmu reset operation Simon Xue <xxm@rock-chips.com> - 2017-07-24 04:40 +0200
  Re: [PATCH V3 1/3] Docs: dt: rockchip: add  rockchip,disable-mmu-reset property Joerg Roedel <joro@8bytes.org> - 2017-07-26 13:00 +0200

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