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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>
5.4-rM2-2.2.x-imx-squashed
Laurentiu Tudor 2018-04-03 17:55:00 +03:00 committed by Dong Aisheng
parent 57ed5de24f
commit 20bdd9d0a8
1 changed files with 11 additions and 0 deletions
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11
drivers/soc/fsl/qbman/bman_ccsr.c
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@ -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 platform_device *pdev)
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 platform_device *pdev)
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);