diff options
| -rw-r--r-- | arch/s390/include/asm/pci.h | 7 | ||||
| -rw-r--r-- | arch/s390/pci/pci.c | 9 | ||||
| -rw-r--r-- | drivers/iommu/s390-iommu.c | 35 |
3 files changed, 50 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index f36b4b726057..386df9adef0a 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -8,6 +8,7 @@ #include <linux/pci.h> #include <linux/mutex.h> +#include <linux/iommu.h> #include <asm-generic/pci.h> #include <asm/pci_clp.h> #include <asm/pci_debug.h> @@ -122,6 +123,8 @@ struct zpci_dev { unsigned long iommu_pages; unsigned int next_bit; + struct iommu_device iommu_dev; /* IOMMU core handle */ + char res_name[16]; struct zpci_bar_struct bars[PCI_BAR_COUNT]; @@ -174,6 +177,10 @@ int clp_enable_fh(struct zpci_dev *, u8); int clp_disable_fh(struct zpci_dev *); int clp_get_state(u32 fid, enum zpci_state *state); +/* IOMMU Interface */ +int zpci_init_iommu(struct zpci_dev *zdev); +void zpci_destroy_iommu(struct zpci_dev *zdev); + #ifdef CONFIG_PCI /* Error handling and recovery */ void zpci_event_error(void *); diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 7b30af5da222..001ca80fa2fe 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -776,6 +776,7 @@ void pcibios_remove_bus(struct pci_bus *bus) zpci_exit_slot(zdev); zpci_cleanup_bus_resources(zdev); + zpci_destroy_iommu(zdev); zpci_free_domain(zdev); spin_lock(&zpci_list_lock); @@ -848,11 +849,15 @@ int zpci_create_device(struct zpci_dev *zdev) if (rc) goto out; + rc = zpci_init_iommu(zdev); + if (rc) + goto out_free; + mutex_init(&zdev->lock); if (zdev->state == ZPCI_FN_STATE_CONFIGURED) { rc = zpci_enable_device(zdev); if (rc) - goto out_free; + goto out_destroy_iommu; } rc = zpci_scan_bus(zdev); if (rc) @@ -869,6 +874,8 @@ int zpci_create_device(struct zpci_dev *zdev) out_disable: if (zdev->state == ZPCI_FN_STATE_ONLINE) zpci_disable_device(zdev); +out_destroy_iommu: + zpci_destroy_iommu(zdev); out_free: zpci_free_domain(zdev); out: diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c index 8788640756a7..85f3bc52efc2 100644 --- a/drivers/iommu/s390-iommu.c +++ b/drivers/iommu/s390-iommu.c @@ -18,6 +18,8 @@ */ #define S390_IOMMU_PGSIZES (~0xFFFUL) +static struct iommu_ops s390_iommu_ops; + struct s390_domain { struct iommu_domain domain; struct list_head devices; @@ -166,11 +168,13 @@ static void s390_iommu_detach_device(struct iommu_domain *domain, static int s390_iommu_add_device(struct device *dev) { struct iommu_group *group = iommu_group_get_for_dev(dev); + struct zpci_dev *zdev = to_pci_dev(dev)->sysdata; if (IS_ERR(group)) return PTR_ERR(group); iommu_group_put(group); + iommu_device_link(&zdev->iommu_dev, dev); return 0; } @@ -197,6 +201,7 @@ static void s390_iommu_remove_device(struct device *dev) s390_iommu_detach_device(domain, dev); } + iommu_device_unlink(&zdev->iommu_dev, dev); iommu_group_remove_device(dev); } @@ -327,6 +332,36 @@ static size_t s390_iommu_unmap(struct iommu_domain *domain, return size; } +int zpci_init_iommu(struct zpci_dev *zdev) +{ + int rc = 0; + + rc = iommu_device_sysfs_add(&zdev->iommu_dev, NULL, NULL, + "s390-iommu.%08x", zdev->fid); + if (rc) + goto out_err; + + iommu_device_set_ops(&zdev->iommu_dev, &s390_iommu_ops); + + rc = iommu_device_register(&zdev->iommu_dev); + if (rc) + goto out_sysfs; + + return 0; + +out_sysfs: + iommu_device_sysfs_remove(&zdev->iommu_dev); + +out_err: + return rc; +} + +void zpci_destroy_iommu(struct zpci_dev *zdev) +{ + iommu_device_unregister(&zdev->iommu_dev); + iommu_device_sysfs_remove(&zdev->iommu_dev); +} + static struct iommu_ops s390_iommu_ops = { .capable = s390_iommu_capable, .domain_alloc = s390_domain_alloc, |