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| author | Robin Murphy <robin.murphy@arm.com> | 2021-08-11 13:21:30 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-08-18 13:27:49 +0200 |
| commit | bf3aed4660c6e3c44c69f07d8927ee5a22a952ac (patch) | |
| tree | d85dbe18b0004a7359904f61342e81aebf40abcd /drivers/iommu/iommu.c | |
| parent | a8e5f04458c4e496eada2b029ce96713bb6c388d (diff) | |
| download | lwn-bf3aed4660c6e3c44c69f07d8927ee5a22a952ac.tar.gz lwn-bf3aed4660c6e3c44c69f07d8927ee5a22a952ac.zip | |
iommu: Introduce explicit type for non-strict DMA domains
Promote the difference between strict and non-strict DMA domains from an
internal detail to a distinct domain feature and type, to pave the road
for exposing it through the sysfs default domain interface.
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/08cd2afaf6b63c58ad49acec3517c9b32c2bb946.1628682049.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/iommu.c')
| -rw-r--r-- | drivers/iommu/iommu.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index b65fcc66ffa4..17d6728f5a09 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -115,6 +115,7 @@ static const char *iommu_domain_type_str(unsigned int t) case IOMMU_DOMAIN_UNMANAGED: return "Unmanaged"; case IOMMU_DOMAIN_DMA: + case IOMMU_DOMAIN_DMA_FQ: return "Translated"; default: return "Unknown"; @@ -552,6 +553,9 @@ static ssize_t iommu_group_show_type(struct iommu_group *group, case IOMMU_DOMAIN_DMA: type = "DMA\n"; break; + case IOMMU_DOMAIN_DMA_FQ: + type = "DMA-FQ\n"; + break; } } mutex_unlock(&group->mutex); @@ -765,7 +769,7 @@ static int iommu_create_device_direct_mappings(struct iommu_group *group, unsigned long pg_size; int ret = 0; - if (!domain || domain->type != IOMMU_DOMAIN_DMA) + if (!domain || !iommu_is_dma_domain(domain)) return 0; BUG_ON(!domain->pgsize_bitmap); @@ -1948,7 +1952,7 @@ static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus, domain->pgsize_bitmap = bus->iommu_ops->pgsize_bitmap; /* Temporarily avoid -EEXIST while drivers still get their own cookies */ - if (type == IOMMU_DOMAIN_DMA && !domain->iova_cookie && iommu_get_dma_cookie(domain)) { + if (iommu_is_dma_domain(domain) && !domain->iova_cookie && iommu_get_dma_cookie(domain)) { iommu_domain_free(domain); domain = NULL; } |