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53 lines
1.6 KiB
Diff
53 lines
1.6 KiB
Diff
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From 02638b2627104cd02aff7484bb250d029e05dc5f Mon Sep 17 00:00:00 2001
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From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
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Date: Tue, 3 Apr 2018 18:08:48 +0300
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Subject: [PATCH] soc/fsl/qman: map FQD and PFDR areas in the iommu
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Add a one-to-one iommu mapping for qman private data memory areas
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(FQD and PFDR). This is required for QMAN to work without faults
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behind an iommu.
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Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
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---
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drivers/soc/fsl/qbman/qman_ccsr.c | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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--- a/drivers/soc/fsl/qbman/qman_ccsr.c
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+++ b/drivers/soc/fsl/qbman/qman_ccsr.c
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@@ -29,6 +29,7 @@
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*/
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#include "qman_priv.h"
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+#include <linux/iommu.h>
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u16 qman_ip_rev;
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EXPORT_SYMBOL(qman_ip_rev);
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@@ -755,6 +756,7 @@ static int fsl_qman_probe(struct platfor
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{
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struct device *dev = &pdev->dev;
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struct device_node *node = dev->of_node;
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+ struct iommu_domain *domain;
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struct resource *res;
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int ret, err_irq;
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u16 id;
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@@ -834,6 +836,19 @@ static int fsl_qman_probe(struct platfor
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}
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dev_dbg(dev, "Allocated PFDR 0x%llx 0x%zx\n", pfdr_a, pfdr_sz);
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+ /* Create an 1-to-1 iommu mapping for fqd and pfdr areas */
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+ domain = iommu_get_domain_for_dev(dev);
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+ if (domain) {
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+ ret = iommu_map(domain, fqd_a, fqd_a, fqd_sz,
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+ IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE);
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+ if (ret)
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+ dev_warn(dev, "iommu_map(fqd) failed %d\n", ret);
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+ ret = iommu_map(domain, pfdr_a, pfdr_a, pfdr_sz,
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+ IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE);
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+ if (ret)
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+ dev_warn(dev, "iommu_map(pfdr) failed %d\n", ret);
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+ }
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+
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ret = qman_init_ccsr(dev);
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if (ret) {
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dev_err(dev, "CCSR setup failed\n");
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