diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 133 | ||||
| -rw-r--r-- | drivers/iommu/amd_iommu_types.h | 2 |
2 files changed, 62 insertions, 73 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 69458d309be0..bb2df2b304a9 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -204,71 +204,61 @@ static struct iommu_dev_data *search_dev_data(u16 devid) return NULL; } -static int __last_alias(struct pci_dev *pdev, u16 alias, void *data) +static int clone_alias(struct pci_dev *pdev, u16 alias, void *data) { - *(u16 *)data = alias; - return 0; -} - -static u16 get_alias(struct device *dev) -{ - struct pci_dev *pdev = to_pci_dev(dev); - u16 devid, ivrs_alias, pci_alias; + u16 devid = pci_dev_id(pdev); - /* The callers make sure that get_device_id() does not fail here */ - devid = get_device_id(dev); - - /* For ACPI HID devices, we simply return the devid as such */ - if (!dev_is_pci(dev)) - return devid; + if (devid == alias) + return 0; - ivrs_alias = amd_iommu_alias_table[devid]; + amd_iommu_rlookup_table[alias] = + amd_iommu_rlookup_table[devid]; + memcpy(amd_iommu_dev_table[alias].data, + amd_iommu_dev_table[devid].data, + sizeof(amd_iommu_dev_table[alias].data)); - pci_for_each_dma_alias(pdev, __last_alias, &pci_alias); + return 0; +} - if (ivrs_alias == pci_alias) - return ivrs_alias; +static void clone_aliases(struct pci_dev *pdev) +{ + if (!pdev) + return; /* - * DMA alias showdown - * - * The IVRS is fairly reliable in telling us about aliases, but it - * can't know about every screwy device. If we don't have an IVRS - * reported alias, use the PCI reported alias. In that case we may - * still need to initialize the rlookup and dev_table entries if the - * alias is to a non-existent device. + * The IVRS alias stored in the alias table may not be + * part of the PCI DMA aliases if it's bus differs + * from the original device. */ - if (ivrs_alias == devid) { - if (!amd_iommu_rlookup_table[pci_alias]) { - amd_iommu_rlookup_table[pci_alias] = - amd_iommu_rlookup_table[devid]; - memcpy(amd_iommu_dev_table[pci_alias].data, - amd_iommu_dev_table[devid].data, - sizeof(amd_iommu_dev_table[pci_alias].data)); - } + clone_alias(pdev, amd_iommu_alias_table[pci_dev_id(pdev)], NULL); - return pci_alias; - } + pci_for_each_dma_alias(pdev, clone_alias, NULL); +} - pci_info(pdev, "Using IVRS reported alias %02x:%02x.%d " - "for device [%04x:%04x], kernel reported alias " - "%02x:%02x.%d\n", PCI_BUS_NUM(ivrs_alias), PCI_SLOT(ivrs_alias), - PCI_FUNC(ivrs_alias), pdev->vendor, pdev->device, - PCI_BUS_NUM(pci_alias), PCI_SLOT(pci_alias), - PCI_FUNC(pci_alias)); +static struct pci_dev *setup_aliases(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + u16 ivrs_alias; + + /* For ACPI HID devices, there are no aliases */ + if (!dev_is_pci(dev)) + return NULL; /* - * If we don't have a PCI DMA alias and the IVRS alias is on the same - * bus, then the IVRS table may know about a quirk that we don't. + * Add the IVRS alias to the pci aliases if it is on the same + * bus. The IVRS table may know about a quirk that we don't. */ - if (pci_alias == devid && + ivrs_alias = amd_iommu_alias_table[pci_dev_id(pdev)]; + if (ivrs_alias != pci_dev_id(pdev) && PCI_BUS_NUM(ivrs_alias) == pdev->bus->number) { pci_add_dma_alias(pdev, ivrs_alias & 0xff); pci_info(pdev, "Added PCI DMA alias %02x.%d\n", PCI_SLOT(ivrs_alias), PCI_FUNC(ivrs_alias)); } - return ivrs_alias; + clone_aliases(pdev); + + return pdev; } static struct iommu_dev_data *find_dev_data(u16 devid) @@ -406,7 +396,7 @@ static int iommu_init_device(struct device *dev) if (!dev_data) return -ENOMEM; - dev_data->alias = get_alias(dev); + dev_data->pdev = setup_aliases(dev); /* * By default we use passthrough mode for IOMMUv2 capable device. @@ -431,20 +421,16 @@ static int iommu_init_device(struct device *dev) static void iommu_ignore_device(struct device *dev) { - u16 alias; int devid; devid = get_device_id(dev); if (devid < 0) return; - alias = get_alias(dev); - + amd_iommu_rlookup_table[devid] = NULL; memset(&amd_iommu_dev_table[devid], 0, sizeof(struct dev_table_entry)); - memset(&amd_iommu_dev_table[alias], 0, sizeof(struct dev_table_entry)); - amd_iommu_rlookup_table[devid] = NULL; - amd_iommu_rlookup_table[alias] = NULL; + setup_aliases(dev); } static void iommu_uninit_device(struct device *dev) @@ -1213,6 +1199,13 @@ static int device_flush_iotlb(struct iommu_dev_data *dev_data, return iommu_queue_command(iommu, &cmd); } +static int device_flush_dte_alias(struct pci_dev *pdev, u16 alias, void *data) +{ + struct amd_iommu *iommu = data; + + return iommu_flush_dte(iommu, alias); +} + /* * Command send function for invalidating a device table entry */ @@ -1223,14 +1216,22 @@ static int device_flush_dte(struct iommu_dev_data *dev_data) int ret; iommu = amd_iommu_rlookup_table[dev_data->devid]; - alias = dev_data->alias; - ret = iommu_flush_dte(iommu, dev_data->devid); - if (!ret && alias != dev_data->devid) - ret = iommu_flush_dte(iommu, alias); + if (dev_data->pdev) + ret = pci_for_each_dma_alias(dev_data->pdev, + device_flush_dte_alias, iommu); + else + ret = iommu_flush_dte(iommu, dev_data->devid); if (ret) return ret; + alias = amd_iommu_alias_table[dev_data->devid]; + if (alias != dev_data->devid) { + ret = iommu_flush_dte(iommu, alias); + if (ret) + return ret; + } + if (dev_data->ats.enabled) ret = device_flush_iotlb(dev_data, 0, ~0UL); @@ -1944,11 +1945,9 @@ static void do_attach(struct iommu_dev_data *dev_data, struct protection_domain *domain) { struct amd_iommu *iommu; - u16 alias; bool ats; iommu = amd_iommu_rlookup_table[dev_data->devid]; - alias = dev_data->alias; ats = dev_data->ats.enabled; /* Update data structures */ @@ -1961,8 +1960,7 @@ static void do_attach(struct iommu_dev_data *dev_data, /* Update device table */ set_dte_entry(dev_data->devid, domain, ats, dev_data->iommu_v2); - if (alias != dev_data->devid) - set_dte_entry(alias, domain, ats, dev_data->iommu_v2); + clone_aliases(dev_data->pdev); device_flush_dte(dev_data); } @@ -1971,17 +1969,14 @@ static void do_detach(struct iommu_dev_data *dev_data) { struct protection_domain *domain = dev_data->domain; struct amd_iommu *iommu; - u16 alias; iommu = amd_iommu_rlookup_table[dev_data->devid]; - alias = dev_data->alias; /* Update data structures */ dev_data->domain = NULL; list_del(&dev_data->list); clear_dte_entry(dev_data->devid); - if (alias != dev_data->devid) - clear_dte_entry(alias); + clone_aliases(dev_data->pdev); /* Flush the DTE entry */ device_flush_dte(dev_data); @@ -2282,13 +2277,7 @@ static void update_device_table(struct protection_domain *domain) list_for_each_entry(dev_data, &domain->dev_list, list) { set_dte_entry(dev_data->devid, domain, dev_data->ats.enabled, dev_data->iommu_v2); - - if (dev_data->devid == dev_data->alias) - continue; - - /* There is an alias, update device table entry for it */ - set_dte_entry(dev_data->alias, domain, dev_data->ats.enabled, - dev_data->iommu_v2); + clone_aliases(dev_data->pdev); } } diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index becbd3bd9180..b611459f369a 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -638,8 +638,8 @@ struct iommu_dev_data { struct list_head list; /* For domain->dev_list */ struct llist_node dev_data_list; /* For global dev_data_list */ struct protection_domain *domain; /* Domain the device is bound to */ + struct pci_dev *pdev; u16 devid; /* PCI Device ID */ - u16 alias; /* Alias Device ID */ bool iommu_v2; /* Device can make use of IOMMUv2 */ bool passthrough; /* Device is identity mapped */ struct { |