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48 lines
1.4 KiB
Diff
48 lines
1.4 KiB
Diff
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From 55705ace9136e1c24d92d7ab23e513439eb766e7 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 17:55:00 +0300
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Subject: [PATCH] soc/fsl/bman: map FBPR area in the iommu
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Add a one-to-one iommu mapping for bman private data memory (FBPR).
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This is required for BMAN to work without faults 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/bman_ccsr.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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--- a/drivers/soc/fsl/qbman/bman_ccsr.c
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+++ b/drivers/soc/fsl/qbman/bman_ccsr.c
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@@ -29,6 +29,7 @@
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*/
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#include "bman_priv.h"
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+#include <linux/iommu.h>
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u16 bman_ip_rev;
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EXPORT_SYMBOL(bman_ip_rev);
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@@ -210,6 +211,7 @@ static int fsl_bman_probe(struct platfor
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int ret, err_irq;
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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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u16 id, bm_pool_cnt;
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u8 major, minor;
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@@ -257,6 +259,15 @@ static int fsl_bman_probe(struct platfor
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dev_dbg(dev, "Allocated FBPR 0x%llx 0x%zx\n", fbpr_a, fbpr_sz);
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+ /* Create an 1-to-1 iommu mapping for FBPR area */
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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, fbpr_a, fbpr_a, fbpr_sz,
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+ IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE);
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+ if (ret)
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+ dev_warn(dev, "failed to iommu_map() %d\n", ret);
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+ }
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+
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bm_set_memory(fbpr_a, fbpr_sz);
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err_irq = platform_get_irq(pdev, 0);
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