| 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); |