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Release 4.11 drivers/vfio/vfio_spapr_eeh.c

Directory: drivers/vfio
/*
 * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Gavin Shan1386.67%150.00%
Alexey Kardashevskiy213.33%150.00%
Total15100.00%2100.00%

EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_open);
void vfio_spapr_pci_eeh_release(struct pci_dev *pdev) { eeh_dev_release(pdev); }

Contributors

PersonTokensPropCommitsCommitProp
Gavin Shan15100.00%1100.00%
Total15100.00%1100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Gavin Shan343100.00%2100.00%
Total343100.00%2100.00%

EXPORT_SYMBOL_GPL(vfio_spapr_iommu_eeh_ioctl); MODULE_VERSION(DRIVER_VERSION); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC);

Overall Contributors

PersonTokensPropCommitsCommitProp
Gavin Shan39791.47%466.67%
Alexey Kardashevskiy378.53%233.33%
Total434100.00%6100.00%
Directory: drivers/vfio
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