diff options
| author | Suravee Suthikulpanit | 2022-07-06 17:07:54 +0530 |
|---|---|---|
| committer | Joerg Roedel | 2022-07-07 09:37:34 +0200 |
| commit | eda797a2779509280c84c557a9caf568b23db4e6 (patch) | |
| tree | b7bd8efbdf929289bde2661a4210d3c30c651fb9 /drivers/iommu/amd/init.c | |
| parent | 04230c119930299f2a30de783c0a643481a66eed (diff) | |
iommu/amd: Introduce per PCI segment rlookup table
This will replace global rlookup table (amd_iommu_rlookup_table).
Add helper functions to set/get rlookup table for the given device.
Also add macros to get seg/devid from sbdf.
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/20220706113825.25582-5-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd/init.c')
| -rw-r--r-- | drivers/iommu/amd/init.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 9f26601368eb..35863ba9f86e 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -665,6 +665,26 @@ static inline void free_dev_table(struct amd_iommu_pci_seg *pci_seg) pci_seg->dev_table = NULL; } +/* Allocate per PCI segment IOMMU rlookup table. */ +static inline int __init alloc_rlookup_table(struct amd_iommu_pci_seg *pci_seg) +{ + pci_seg->rlookup_table = (void *)__get_free_pages( + GFP_KERNEL | __GFP_ZERO, + get_order(rlookup_table_size)); + if (pci_seg->rlookup_table == NULL) + return -ENOMEM; + + return 0; +} + +static inline void free_rlookup_table(struct amd_iommu_pci_seg *pci_seg) +{ + free_pages((unsigned long)pci_seg->rlookup_table, + get_order(rlookup_table_size)); + pci_seg->rlookup_table = NULL; +} + + /* * Allocates the command buffer. This buffer is per AMD IOMMU. We can * write commands to that buffer later and the IOMMU will execute them @@ -1491,6 +1511,8 @@ static struct amd_iommu_pci_seg *__init alloc_pci_segment(u16 id) if (alloc_dev_table(pci_seg)) return NULL; + if (alloc_rlookup_table(pci_seg)) + return NULL; return pci_seg; } @@ -1513,6 +1535,7 @@ static void __init free_pci_segments(void) for_each_pci_segment_safe(pci_seg, next) { list_del(&pci_seg->list); + free_rlookup_table(pci_seg); free_dev_table(pci_seg); kfree(pci_seg); } |