diff options
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/vfio/pci/vfio_pci.c | 18 | ||||
| -rw-r--r-- | drivers/vfio/vfio_iommu_spapr_tce.c | 17 | ||||
| -rw-r--r-- | drivers/vfio/vfio_spapr_eeh.c | 87 |
4 files changed, 118 insertions, 5 deletions
diff --git a/drivers/vfio/Makefile b/drivers/vfio/Makefile index 72bfabc8629..50e30bc75e8 100644 --- a/drivers/vfio/Makefile +++ b/drivers/vfio/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_VFIO) += vfio.o obj-$(CONFIG_VFIO_IOMMU_TYPE1) += vfio_iommu_type1.o obj-$(CONFIG_VFIO_IOMMU_SPAPR_TCE) += vfio_iommu_spapr_tce.o +obj-$(CONFIG_EEH) += vfio_spapr_eeh.o obj-$(CONFIG_VFIO_PCI) += pci/ diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 010e0f8b8e4..e2ee80f36e3 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -157,8 +157,10 @@ static void vfio_pci_release(void *device_data) { struct vfio_pci_device *vdev = device_data; - if (atomic_dec_and_test(&vdev->refcnt)) + if (atomic_dec_and_test(&vdev->refcnt)) { + vfio_spapr_pci_eeh_release(vdev->pdev); vfio_pci_disable(vdev); + } module_put(THIS_MODULE); } @@ -166,19 +168,27 @@ static void vfio_pci_release(void *device_data) static int vfio_pci_open(void *device_data) { struct vfio_pci_device *vdev = device_data; + int ret; if (!try_module_get(THIS_MODULE)) return -ENODEV; if (atomic_inc_return(&vdev->refcnt) == 1) { - int ret = vfio_pci_enable(vdev); + ret = vfio_pci_enable(vdev); + if (ret) + goto error; + + ret = vfio_spapr_pci_eeh_open(vdev->pdev); if (ret) { - module_put(THIS_MODULE); - return ret; + vfio_pci_disable(vdev); + goto error; } } return 0; +error: + module_put(THIS_MODULE); + return ret; } static int vfio_pci_get_irq_count(struct vfio_pci_device *vdev, int irq_type) diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c index a84788ba662..730b4ef3e0c 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -156,7 +156,16 @@ static long tce_iommu_ioctl(void *iommu_data, switch (cmd) { case VFIO_CHECK_EXTENSION: - return (arg == VFIO_SPAPR_TCE_IOMMU) ? 1 : 0; + switch (arg) { + case VFIO_SPAPR_TCE_IOMMU: + ret = 1; + break; + default: + ret = vfio_spapr_iommu_eeh_ioctl(NULL, cmd, arg); + break; + } + + return (ret < 0) ? 0 : ret; case VFIO_IOMMU_SPAPR_TCE_GET_INFO: { struct vfio_iommu_spapr_tce_info info; @@ -283,6 +292,12 @@ static long tce_iommu_ioctl(void *iommu_data, tce_iommu_disable(container); mutex_unlock(&container->lock); return 0; + case VFIO_EEH_PE_OP: + if (!container->tbl || !container->tbl->it_group) + return -ENODEV; + + return vfio_spapr_iommu_eeh_ioctl(container->tbl->it_group, + cmd, arg); } return -ENOTTY; diff --git a/drivers/vfio/vfio_spapr_eeh.c b/drivers/vfio/vfio_spapr_eeh.c new file mode 100644 index 00000000000..f834b4ce143 --- /dev/null +++ b/drivers/vfio/vfio_spapr_eeh.c @@ -0,0 +1,87 @@ +/* + * EEH functionality support for VFIO devices. The feature is only + * available on sPAPR compatible platforms. + * + * Copyright Gavin Shan, IBM Corporation 2014. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/uaccess.h> +#include <linux/vfio.h> +#include <asm/eeh.h> + +/* We might build address mapping here for "fast" path later */ +int vfio_spapr_pci_eeh_open(struct pci_dev *pdev) +{ + return eeh_dev_open(pdev); +} + +void vfio_spapr_pci_eeh_release(struct pci_dev *pdev) +{ + eeh_dev_release(pdev); +} + +long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group, + unsigned int cmd, unsigned long arg) +{ + struct eeh_pe *pe; + struct vfio_eeh_pe_op op; + unsigned long minsz; + long ret = -EINVAL; + + switch (cmd) { + case VFIO_CHECK_EXTENSION: + if (arg == VFIO_EEH) + ret = eeh_enabled() ? 1 : 0; + else + ret = 0; + break; + case VFIO_EEH_PE_OP: + pe = eeh_iommu_group_to_pe(group); + if (!pe) + return -ENODEV; + + minsz = offsetofend(struct vfio_eeh_pe_op, op); + if (copy_from_user(&op, (void __user *)arg, minsz)) + return -EFAULT; + if (op.argsz < minsz || op.flags) + return -EINVAL; + + switch (op.op) { + case VFIO_EEH_PE_DISABLE: + ret = eeh_pe_set_option(pe, EEH_OPT_DISABLE); + break; + case VFIO_EEH_PE_ENABLE: + ret = eeh_pe_set_option(pe, EEH_OPT_ENABLE); + break; + case VFIO_EEH_PE_UNFREEZE_IO: + ret = eeh_pe_set_option(pe, EEH_OPT_THAW_MMIO); + break; + case VFIO_EEH_PE_UNFREEZE_DMA: + ret = eeh_pe_set_option(pe, EEH_OPT_THAW_DMA); + break; + case VFIO_EEH_PE_GET_STATE: + ret = eeh_pe_get_state(pe); + break; + case VFIO_EEH_PE_RESET_DEACTIVATE: + ret = eeh_pe_reset(pe, EEH_RESET_DEACTIVATE); + break; + case VFIO_EEH_PE_RESET_HOT: + ret = eeh_pe_reset(pe, EEH_RESET_HOT); + break; + case VFIO_EEH_PE_RESET_FUNDAMENTAL: + ret = eeh_pe_reset(pe, EEH_RESET_FUNDAMENTAL); + break; + case VFIO_EEH_PE_CONFIGURE: + ret = eeh_pe_configure(pe); + break; + default: + ret = -EINVAL; + } + } + + return ret; +} |