diff options
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index b938a4ac3a37..e7825b25c62f 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -39,6 +39,7 @@ #include <linux/dma-contiguous.h> #include <linux/irqdomain.h> #include <linux/percpu.h> +#include <linux/iova.h> #include <asm/irq_remapping.h> #include <asm/io_apic.h> #include <asm/apic.h> @@ -57,6 +58,11 @@ #define LOOP_TIMEOUT 100000 +/* IO virtual address start page frame number */ +#define IOVA_START_PFN (1) +#define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) +#define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) + /* * This bitmap is used to advertise the page sizes our hardware support * to the IOMMU core, which will then use this information to split @@ -158,6 +164,9 @@ struct dma_ops_domain { /* address space relevant data */ struct aperture_range *aperture[APERTURE_MAX_RANGES]; + + /* IOVA RB-Tree */ + struct iova_domain iovad; }; /**************************************************************************** @@ -1969,6 +1978,8 @@ static void dma_ops_domain_free(struct dma_ops_domain *dom) if (!dom) return; + put_iova_domain(&dom->iovad); + free_percpu(dom->next_index); del_domain_from_list(&dom->domain); @@ -2044,6 +2055,9 @@ static struct dma_ops_domain *dma_ops_domain_alloc(void) for_each_possible_cpu(cpu) *per_cpu_ptr(dma_dom->next_index, cpu) = 0; + init_iova_domain(&dma_dom->iovad, PAGE_SIZE, + IOVA_START_PFN, DMA_32BIT_PFN); + return dma_dom; free_dma_dom: @@ -2951,7 +2965,11 @@ static struct dma_map_ops amd_iommu_dma_ops = { int __init amd_iommu_init_api(void) { - int err = 0; + int ret, err = 0; + + ret = iova_cache_get(); + if (ret) + return ret; err = bus_set_iommu(&pci_bus_type, &amd_iommu_ops); if (err) |