111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
|
/*
|
||
|
|
* 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/module.h>
|
||
|
|
#include <linux/uaccess.h>
|
||
|
|
#include <linux/vfio.h>
|
||
|
|
#include <asm/eeh.h>
|
||
|
|
|
||
|
|
#define DRIVER_VERSION "0.1"
|
||
|
|
#define DRIVER_AUTHOR "Gavin Shan, IBM Corporation"
|
||
|
|
#define DRIVER_DESC "VFIO IOMMU SPAPR EEH"
|
||
|
|
|
||
|
|
/* We might build address mapping here for "fast" path later */
|
||
|
|
void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
|
||
|
|
{
|
||
|
|
eeh_dev_open(pdev);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_open);
|
||
|
|
|
||
|
|
void vfio_spapr_pci_eeh_release(struct pci_dev *pdev)
|
||
|
|
{
|
||
|
|
eeh_dev_release(pdev);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_release);
|
||
|
|
|
||
|
|
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;
|
||
|
|
case VFIO_EEH_PE_INJECT_ERR:
|
||
|
|
minsz = offsetofend(struct vfio_eeh_pe_op, err.mask);
|
||
|
|
if (op.argsz < minsz)
|
||
|
|
return -EINVAL;
|
||
|
|
if (copy_from_user(&op, (void __user *)arg, minsz))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
ret = eeh_pe_inject_err(pe, op.err.type, op.err.func,
|
||
|
|
op.err.addr, op.err.mask);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
ret = -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vfio_spapr_iommu_eeh_ioctl);
|
||
|
|
|
||
|
|
MODULE_VERSION(DRIVER_VERSION);
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|