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| author | Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> | 2024-07-03 11:16:00 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2024-07-03 15:45:47 +0100 |
| commit | 52acd7d8a4130ad4dda6540dbbb821a92e1c0138 (patch) | |
| tree | d1a8cc37451404df7c37d31d1a3fcdd153b4202f /drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | |
| parent | 9796cf9b3eb9a0b9502dfe0b3acf63610090ef44 (diff) | |
| download | lwn-52acd7d8a4130ad4dda6540dbbb821a92e1c0138.tar.gz lwn-52acd7d8a4130ad4dda6540dbbb821a92e1c0138.zip | |
iommu/arm-smmu-v3: Add support for domain_alloc_user fn
This will be used by iommufd for allocating usr managed domains and is
also required when we add support for iommufd based dirty tracking
support.
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20240703101604.2576-2-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c')
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index fbb7eb152d82..c616a38ecf28 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -36,6 +36,8 @@ module_param(disable_msipolling, bool, 0444); MODULE_PARM_DESC(disable_msipolling, "Disable MSI-based polling for CMD_SYNC completion."); +static struct iommu_ops arm_smmu_ops; + enum arm_smmu_msi_index { EVTQ_MSI_INDEX, GERROR_MSI_INDEX, @@ -3020,6 +3022,34 @@ static struct iommu_domain arm_smmu_blocked_domain = { .ops = &arm_smmu_blocked_ops, }; +static struct iommu_domain * +arm_smmu_domain_alloc_user(struct device *dev, u32 flags, + struct iommu_domain *parent, + const struct iommu_user_data *user_data) +{ + struct arm_smmu_master *master = dev_iommu_priv_get(dev); + struct arm_smmu_domain *smmu_domain; + int ret; + + if (flags || parent || user_data) + return ERR_PTR(-EOPNOTSUPP); + + smmu_domain = arm_smmu_domain_alloc(); + if (!smmu_domain) + return ERR_PTR(-ENOMEM); + + smmu_domain->domain.type = IOMMU_DOMAIN_UNMANAGED; + smmu_domain->domain.ops = arm_smmu_ops.default_domain_ops; + ret = arm_smmu_domain_finalise(smmu_domain, master->smmu); + if (ret) + goto err_free; + return &smmu_domain->domain; + +err_free: + kfree(smmu_domain); + return ERR_PTR(ret); +} + static int arm_smmu_map_pages(struct iommu_domain *domain, unsigned long iova, phys_addr_t paddr, size_t pgsize, size_t pgcount, int prot, gfp_t gfp, size_t *mapped) @@ -3190,8 +3220,6 @@ static void arm_smmu_remove_master(struct arm_smmu_master *master) kfree(master->streams); } -static struct iommu_ops arm_smmu_ops; - static struct iommu_device *arm_smmu_probe_device(struct device *dev) { int ret; @@ -3399,6 +3427,7 @@ static struct iommu_ops arm_smmu_ops = { .capable = arm_smmu_capable, .domain_alloc_paging = arm_smmu_domain_alloc_paging, .domain_alloc_sva = arm_smmu_sva_domain_alloc, + .domain_alloc_user = arm_smmu_domain_alloc_user, .probe_device = arm_smmu_probe_device, .release_device = arm_smmu_release_device, .device_group = arm_smmu_device_group, |