diff options
| author | Antonios Motakis <a.motakis@virtualopensystems.com> | 2014-05-12 11:44:59 +0530 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2014-05-13 19:12:58 +0200 |
| commit | bf4a1c920286076609779c2c70c5a2bf69169fc7 (patch) | |
| tree | 63c13531824d2e32739cd9c87ce4ec6691a0eddd /drivers/iommu | |
| parent | d09d78fc986be8355928256d1b86b713588999d7 (diff) | |
iommu/exynos: Add devices attached to the System MMU to an IOMMU group
Patch written by Antonios Motakis <a.motakis@virtualopensystems.com>:
IOMMU groups are expected by certain users of the IOMMU API,
e.g. VFIO. Since each device is behind its own System MMU, we
can allocate a new IOMMU group for each device.
Reviewed-by: Cho KyongHo <pullip.cho@samsung.com>
Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Shaik Ameeer Basha <shaik.ameer@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 3291619c9db0..d18dc379f536 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -964,6 +964,32 @@ static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *domain, return phys; } +static int exynos_iommu_add_device(struct device *dev) +{ + struct iommu_group *group; + int ret; + + group = iommu_group_get(dev); + + if (!group) { + group = iommu_group_alloc(); + if (IS_ERR(group)) { + dev_err(dev, "Failed to allocate IOMMU group\n"); + return PTR_ERR(group); + } + } + + ret = iommu_group_add_device(group, dev); + iommu_group_put(group); + + return ret; +} + +static void exynos_iommu_remove_device(struct device *dev) +{ + iommu_group_remove_device(dev); +} + static struct iommu_ops exynos_iommu_ops = { .domain_init = &exynos_iommu_domain_init, .domain_destroy = &exynos_iommu_domain_destroy, @@ -972,6 +998,8 @@ static struct iommu_ops exynos_iommu_ops = { .map = &exynos_iommu_map, .unmap = &exynos_iommu_unmap, .iova_to_phys = &exynos_iommu_iova_to_phys, + .add_device = &exynos_iommu_add_device, + .remove_device = &exynos_iommu_remove_device, .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE, }; |