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author | Joerg Roedel <jroedel@suse.de> | 2015-05-28 18:41:37 +0200 |
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committer | Joerg Roedel <jroedel@suse.de> | 2015-06-11 09:42:20 +0200 |
commit | 35cf248f8860b8d2956516d6cdf7e57ff4ed4cbb (patch) | |
tree | ae5e169684a65da2a2b8eb28f20fc8e6559c8d36 /drivers/iommu | |
parent | iommu: Introduce iommu_request_dm_for_dev() (diff) | |
download | linux-35cf248f8860b8d2956516d6cdf7e57ff4ed4cbb.tar.xz linux-35cf248f8860b8d2956516d6cdf7e57ff4ed4cbb.zip |
iommu/amd: Implement dm_region call-backs
Add the get_dm_regions and put_dm_regions callbacks to the
iommu_ops of the AMD IOMMU driver.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r-- | drivers/iommu/amd_iommu.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index e43d48956dea..22d38e3cdc7a 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3412,6 +3412,47 @@ static bool amd_iommu_capable(enum iommu_cap cap) return false; } +static void amd_iommu_get_dm_regions(struct device *dev, + struct list_head *head) +{ + struct unity_map_entry *entry; + u16 devid; + + devid = get_device_id(dev); + + list_for_each_entry(entry, &amd_iommu_unity_map, list) { + struct iommu_dm_region *region; + + if (devid < entry->devid_start || devid > entry->devid_end) + continue; + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) { + pr_err("Out of memory allocating dm-regions for %s\n", + dev_name(dev)); + return; + } + + region->start = entry->address_start; + region->length = entry->address_end - entry->address_start; + if (entry->prot & IOMMU_PROT_IR) + region->prot |= IOMMU_READ; + if (entry->prot & IOMMU_PROT_IW) + region->prot |= IOMMU_WRITE; + + list_add_tail(®ion->list, head); + } +} + +static void amd_iommu_put_dm_regions(struct device *dev, + struct list_head *head) +{ + struct iommu_dm_region *entry, *next; + + list_for_each_entry_safe(entry, next, head, list) + kfree(entry); +} + static const struct iommu_ops amd_iommu_ops = { .capable = amd_iommu_capable, .domain_alloc = amd_iommu_domain_alloc, @@ -3422,6 +3463,8 @@ static const struct iommu_ops amd_iommu_ops = { .unmap = amd_iommu_unmap, .map_sg = default_iommu_map_sg, .iova_to_phys = amd_iommu_iova_to_phys, + .get_dm_regions = amd_iommu_get_dm_regions, + .put_dm_regions = amd_iommu_put_dm_regions, .pgsize_bitmap = AMD_IOMMU_PGSIZES, }; |