diff options
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 102 |
1 files changed, 77 insertions, 25 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index a2e418cba0ff..6d1cbdfc9b2a 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -83,6 +83,8 @@ static struct iommu_ops amd_iommu_ops; static ATOMIC_NOTIFIER_HEAD(ppr_notifier); int amd_iommu_max_glx_val = -1; +static struct dma_map_ops amd_iommu_dma_ops; + /* * general struct to manage commands send to an IOMMU */ @@ -254,11 +256,21 @@ static bool check_device(struct device *dev) return true; } +static void swap_pci_ref(struct pci_dev **from, struct pci_dev *to) +{ + pci_dev_put(*from); + *from = to; +} + +#define REQ_ACS_FLAGS (PCI_ACS_SV | PCI_ACS_RR | PCI_ACS_CR | PCI_ACS_UF) + static int iommu_init_device(struct device *dev) { - struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *dma_pdev, *pdev = to_pci_dev(dev); struct iommu_dev_data *dev_data; + struct iommu_group *group; u16 alias; + int ret; if (dev->archdata.iommu) return 0; @@ -279,8 +291,43 @@ static int iommu_init_device(struct device *dev) return -ENOTSUPP; } dev_data->alias_data = alias_data; + + dma_pdev = pci_get_bus_and_slot(alias >> 8, alias & 0xff); + } else + dma_pdev = pci_dev_get(pdev); + + swap_pci_ref(&dma_pdev, pci_get_dma_source(dma_pdev)); + + if (dma_pdev->multifunction && + !pci_acs_enabled(dma_pdev, REQ_ACS_FLAGS)) + swap_pci_ref(&dma_pdev, + pci_get_slot(dma_pdev->bus, + PCI_DEVFN(PCI_SLOT(dma_pdev->devfn), + 0))); + + while (!pci_is_root_bus(dma_pdev->bus)) { + if (pci_acs_path_enabled(dma_pdev->bus->self, + NULL, REQ_ACS_FLAGS)) + break; + + swap_pci_ref(&dma_pdev, pci_dev_get(dma_pdev->bus->self)); + } + + group = iommu_group_get(&dma_pdev->dev); + pci_dev_put(dma_pdev); + if (!group) { + group = iommu_group_alloc(); + if (IS_ERR(group)) + return PTR_ERR(group); } + ret = iommu_group_add_device(group, dev); + + iommu_group_put(group); + + if (ret) + return ret; + if (pci_iommuv2_capable(pdev)) { struct amd_iommu *iommu; @@ -309,6 +356,8 @@ static void iommu_ignore_device(struct device *dev) static void iommu_uninit_device(struct device *dev) { + iommu_group_remove_device(dev); + /* * Nothing to do here - we keep dev_data around for unplugged devices * and reuse it when the device is re-plugged - not doing so would @@ -382,7 +431,6 @@ DECLARE_STATS_COUNTER(invalidate_iotlb); DECLARE_STATS_COUNTER(invalidate_iotlb_all); DECLARE_STATS_COUNTER(pri_requests); - static struct dentry *stats_dir; static struct dentry *de_fflush; @@ -402,7 +450,7 @@ static void amd_iommu_stats_init(void) return; de_fflush = debugfs_create_bool("fullflush", 0444, stats_dir, - (u32 *)&amd_iommu_unmap_flush); + &amd_iommu_unmap_flush); amd_iommu_stats_add(&compl_wait); amd_iommu_stats_add(&cnt_map_single); @@ -2071,7 +2119,7 @@ out_err: /* FIXME: Move this to PCI code */ #define PCI_PRI_TLP_OFF (1 << 15) -bool pci_pri_tlp_required(struct pci_dev *pdev) +static bool pci_pri_tlp_required(struct pci_dev *pdev) { u16 status; int pos; @@ -2252,6 +2300,18 @@ static int device_change_notifier(struct notifier_block *nb, iommu_init_device(dev); + /* + * dev_data is still NULL and + * got initialized in iommu_init_device + */ + dev_data = get_dev_data(dev); + + if (iommu_pass_through || dev_data->iommu_v2) { + dev_data->passthrough = true; + attach_device(dev, pt_domain); + break; + } + domain = domain_for_device(dev); /* allocate a protection domain if a device is added */ @@ -2267,6 +2327,10 @@ static int device_change_notifier(struct notifier_block *nb, list_add_tail(&dma_domain->list, &iommu_pd_list); spin_unlock_irqrestore(&iommu_pd_list_lock, flags); + dev_data = get_dev_data(dev); + + dev->archdata.dma_ops = &amd_iommu_dma_ops; + break; case BUS_NOTIFY_DEL_DEVICE: @@ -2963,6 +3027,11 @@ int __init amd_iommu_init_dma_ops(void) amd_iommu_stats_init(); + if (amd_iommu_unmap_flush) + pr_info("AMD-Vi: IO/TLB flush on unmap enabled\n"); + else + pr_info("AMD-Vi: Lazy IO/TLB flushing enabled\n"); + return 0; free_domains: @@ -3069,6 +3138,10 @@ static int amd_iommu_domain_init(struct iommu_domain *dom) dom->priv = domain; + dom->geometry.aperture_start = 0; + dom->geometry.aperture_end = ~0ULL; + dom->geometry.force_aperture = true; + return 0; out_free: @@ -3227,26 +3300,6 @@ static int amd_iommu_domain_has_cap(struct iommu_domain *domain, return 0; } -static int amd_iommu_device_group(struct device *dev, unsigned int *groupid) -{ - struct iommu_dev_data *dev_data = dev->archdata.iommu; - struct pci_dev *pdev = to_pci_dev(dev); - u16 devid; - - if (!dev_data) - return -ENODEV; - - if (pdev->is_virtfn || !iommu_group_mf) - devid = dev_data->devid; - else - devid = calc_devid(pdev->bus->number, - PCI_DEVFN(PCI_SLOT(pdev->devfn), 0)); - - *groupid = amd_iommu_alias_table[devid]; - - return 0; -} - static struct iommu_ops amd_iommu_ops = { .domain_init = amd_iommu_domain_init, .domain_destroy = amd_iommu_domain_destroy, @@ -3256,7 +3309,6 @@ static struct iommu_ops amd_iommu_ops = { .unmap = amd_iommu_unmap, .iova_to_phys = amd_iommu_iova_to_phys, .domain_has_cap = amd_iommu_domain_has_cap, - .device_group = amd_iommu_device_group, .pgsize_bitmap = AMD_IOMMU_PGSIZES, }; |