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soc/fsl/qman: map FQD and PFDR areas in the iommu 

Add a one-to-one iommu mapping for qman private data memory areas
(FQD and PFDR). This is required for QMAN 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 18:08:48 +03:00 committed by Dong Aisheng
parent 20bdd9d0a8
commit 8c0225ba64
1 changed files with 15 additions and 0 deletions
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15
drivers/soc/fsl/qbman/qman_ccsr.c
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@ -29,6 +29,7 @@
*/
#include "qman_priv.h"
#include <linux/iommu.h>
u16 qman_ip_rev;
EXPORT_SYMBOL(qman_ip_rev);
@ -755,6 +756,7 @@ static int fsl_qman_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct iommu_domain *domain;
struct resource *res;
int ret, err_irq;
u16 id;
@ -834,6 +836,19 @@ static int fsl_qman_probe(struct platform_device *pdev)
}
dev_dbg(dev, "Allocated PFDR 0x%llx 0x%zx\n", pfdr_a, pfdr_sz);
/* Create an 1-to-1 iommu mapping for fqd and pfdr areas */
domain = iommu_get_domain_for_dev(dev);
if (domain) {
ret = iommu_map(domain, fqd_a, fqd_a, fqd_sz,
IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE);
if (ret)
dev_warn(dev, "iommu_map(fqd) failed %d\n", ret);
ret = iommu_map(domain, pfdr_a, pfdr_a, pfdr_sz,
IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE);
if (ret)
dev_warn(dev, "iommu_map(pfdr) failed %d\n", ret);
}
ret = qman_init_ccsr(dev);
if (ret) {
dev_err(dev, "CCSR setup failed\n");