diff options
| author | Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> | 2022-08-25 09:39:38 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-09-07 17:12:37 +0300 |
| commit | 4db6c41f09469ab8ca5d30f5d4731f299d25ff1c (patch) | |
| tree | 57a4ee32b5140a38e2f6d5c3f8634fec20e04f58 /drivers/iommu | |
| parent | 643feb0072d5aad9bf5f38eca3fb78c2f8d9f140 (diff) | |
| download | linux-4db6c41f09469ab8ca5d30f5d4731f299d25ff1c.tar.xz | |
iommu/amd: Add support for using AMD IOMMU v2 page table for DMA-API
Introduce init function for setting up DMA domain for DMA-API with
the IOMMU v2 page table.
Co-developed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20220825063939.8360-9-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 6abc338dc207..6bfcac8de1f4 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1653,6 +1653,10 @@ static void do_attach(struct iommu_dev_data *dev_data, domain->dev_iommu[iommu->index] += 1; domain->dev_cnt += 1; + /* Override supported page sizes */ + if (domain->flags & PD_GIOV_MASK) + domain->domain.pgsize_bitmap = AMD_IOMMU_PGSIZES_V2; + /* Update device table */ set_dte_entry(iommu, dev_data->devid, domain, ats, dev_data->iommu_v2); @@ -2032,6 +2036,24 @@ static int protection_domain_init_v1(struct protection_domain *domain, int mode) return 0; } +static int protection_domain_init_v2(struct protection_domain *domain) +{ + spin_lock_init(&domain->lock); + domain->id = domain_id_alloc(); + if (!domain->id) + return -ENOMEM; + INIT_LIST_HEAD(&domain->dev_list); + + domain->flags |= PD_GIOV_MASK; + + if (domain_enable_v2(domain, 1)) { + domain_id_free(domain->id); + return -ENOMEM; + } + + return 0; +} + static struct protection_domain *protection_domain_alloc(unsigned int type) { struct io_pgtable_ops *pgtbl_ops; @@ -2059,6 +2081,9 @@ static struct protection_domain *protection_domain_alloc(unsigned int type) case AMD_IOMMU_V1: ret = protection_domain_init_v1(domain, mode); break; + case AMD_IOMMU_V2: + ret = protection_domain_init_v2(domain); + break; default: ret = -EINVAL; } |