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git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Cornelia Huck
d5afd5d135
Add a region to the vfio-ccw device that can be used to submit asynchronous I/O instructions. ssch continues to be handled by the existing I/O region; the new region handles hsch and csch. Interrupt status continues to be reported through the same channels as for ssch. Acked-by: Eric Farman <[email protected]> Reviewed-by: Farhan Ali <[email protected]> Signed-off-by: Cornelia Huck <[email protected]>
38 lines
806 B
C
38 lines
806 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Interfaces for vfio-ccw
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*
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* Copyright IBM Corp. 2017
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*
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* Author(s): Dong Jia Shi <[email protected]>
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*/
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#ifndef _VFIO_CCW_H_
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#define _VFIO_CCW_H_
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#include <linux/types.h>
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/* used for START SUBCHANNEL, always present */
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struct ccw_io_region {
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#define ORB_AREA_SIZE 12
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__u8 orb_area[ORB_AREA_SIZE];
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#define SCSW_AREA_SIZE 12
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__u8 scsw_area[SCSW_AREA_SIZE];
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#define IRB_AREA_SIZE 96
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__u8 irb_area[IRB_AREA_SIZE];
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__u32 ret_code;
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} __packed;
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/*
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* used for processing commands that trigger asynchronous actions
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* Note: this is controlled by a capability
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*/
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#define VFIO_CCW_ASYNC_CMD_HSCH (1 << 0)
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#define VFIO_CCW_ASYNC_CMD_CSCH (1 << 1)
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struct ccw_cmd_region {
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__u32 command;
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__u32 ret_code;
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} __packed;
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#endif
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