diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0002-soc-fsl-bman-map-FBPR-area-in-the-iommu.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0002-soc-fsl-bman-map-FBPR-area-in-the-iommu.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0002-soc-fsl-bman-map-FBPR-area-in-the-iommu.patch b/target/linux/layerscape/patches-5.4/701-net-0002-soc-fsl-bman-map-FBPR-area-in-the-iommu.patch new file mode 100644 index 0000000000..afafe928e4 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0002-soc-fsl-bman-map-FBPR-area-in-the-iommu.patch @@ -0,0 +1,47 @@ +From 55705ace9136e1c24d92d7ab23e513439eb766e7 Mon Sep 17 00:00:00 2001 +From: Laurentiu Tudor <laurentiu.tudor@nxp.com> +Date: Tue, 3 Apr 2018 17:55:00 +0300 +Subject: [PATCH] soc/fsl/bman: map FBPR area in the iommu + +Add a one-to-one iommu mapping for bman private data memory (FBPR). +This is required for BMAN to work without faults behind an iommu. + +Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> +--- + drivers/soc/fsl/qbman/bman_ccsr.c | 11 +++++++++++ + 1 file changed, 11 insertions(+) + +--- a/drivers/soc/fsl/qbman/bman_ccsr.c ++++ b/drivers/soc/fsl/qbman/bman_ccsr.c +@@ -29,6 +29,7 @@ + */ + + #include "bman_priv.h" ++#include <linux/iommu.h> + + u16 bman_ip_rev; + EXPORT_SYMBOL(bman_ip_rev); +@@ -210,6 +211,7 @@ static int fsl_bman_probe(struct platfor + int ret, err_irq; + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; ++ struct iommu_domain *domain; + struct resource *res; + u16 id, bm_pool_cnt; + u8 major, minor; +@@ -257,6 +259,15 @@ static int fsl_bman_probe(struct platfor + + dev_dbg(dev, "Allocated FBPR 0x%llx 0x%zx\n", fbpr_a, fbpr_sz); + ++ /* Create an 1-to-1 iommu mapping for FBPR area */ ++ domain = iommu_get_domain_for_dev(dev); ++ if (domain) { ++ ret = iommu_map(domain, fbpr_a, fbpr_a, fbpr_sz, ++ IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE); ++ if (ret) ++ dev_warn(dev, "failed to iommu_map() %d\n", ret); ++ } ++ + bm_set_memory(fbpr_a, fbpr_sz); + + err_irq = platform_get_irq(pdev, 0); |