On 07/16/2014 10:20 AM, Gavin Shan wrote:
> This updates kernel header (vfio.h) for EEH support on VFIO PCI
> devices.
Has this reached kernel upstream? The way linux headers update normally
happens is you have to run scripts/update-linux-headers.sh against some
linux kernel tag which you know that it won't change (like v3.16-rc5) and
post all the changes as a single patch. It is never a header update for a
specific feature, it is just an update.
>
> Signed-off-by: Gavin Shan <gws...@linux.vnet.ibm.com>
> ---
> linux-headers/linux/vfio.h | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h
> index 26c218e..95b591b 100644
> --- a/linux-headers/linux/vfio.h
> +++ b/linux-headers/linux/vfio.h
> @@ -30,6 +30,9 @@
> */
> #define VFIO_DMA_CC_IOMMU 4
>
> +/* Check if EEH is supported */
> +#define VFIO_EEH 5
> +
> /*
> * The IOCTL interface is designed for extensibility by embedding the
> * structure length (argsz) and flags into structures passed between
> @@ -455,6 +458,37 @@ struct vfio_iommu_spapr_tce_info {
>
> #define VFIO_IOMMU_SPAPR_TCE_GET_INFO _IO(VFIO_TYPE, VFIO_BASE + 12)
>
> +/*
> + * EEH PE operation struct provides ways to:
> + * - enable/disable EEH functionality;
> + * - unfreeze IO/DMA for frozen PE;
> + * - read PE state;
> + * - reset PE;
> + * - configure PE.
> + */
> +struct vfio_eeh_pe_op {
> + __u32 argsz;
> + __u32 flags;
> + __u32 op;
> +};
> +
> +#define VFIO_EEH_PE_DISABLE 0 /* Disable EEH functionality */
> +#define VFIO_EEH_PE_ENABLE 1 /* Enable EEH functionality */
> +#define VFIO_EEH_PE_UNFREEZE_IO 2 /* Enable IO for frozen
> PE */
> +#define VFIO_EEH_PE_UNFREEZE_DMA 3 /* Enable DMA for frozen PE */
> +#define VFIO_EEH_PE_GET_STATE 4 /* PE state retrieval
> */
> +#define VFIO_EEH_PE_STATE_NORMAL 0 /* PE in functional state */
> +#define VFIO_EEH_PE_STATE_RESET 1 /* PE reset in progress */
> +#define VFIO_EEH_PE_STATE_STOPPED 2 /* Stopped DMA and IO */
> +#define VFIO_EEH_PE_STATE_STOPPED_DMA 4 /* Stopped DMA only
> */
> +#define VFIO_EEH_PE_STATE_UNAVAIL 5 /* State unavailable */
> +#define VFIO_EEH_PE_RESET_DEACTIVATE 5 /* Deassert PE reset */
> +#define VFIO_EEH_PE_RESET_HOT 6 /* Assert hot reset
> */
> +#define VFIO_EEH_PE_RESET_FUNDAMENTAL 7 /* Assert fundamental
> reset */
> +#define VFIO_EEH_PE_CONFIGURE 8 /* PE configuration
> */
> +
> +#define VFIO_EEH_PE_OP _IO(VFIO_TYPE, VFIO_BASE + 21)
> +
> /* ***************************************************************** */
>
> #endif /* VFIO_H */
>
--
Alexey
