NAME¶

cxl_read_event - read one CXL event from an AFU

SYNOPSIS¶

#include <libcxl.h>

int cxl_read_event(struct cxl_afu_h *afu, struct cxl_event *event);

DESCRIPTION¶

cxl_read_event() reads one CXL event from afu, and copies it to the structure pointed to by event.

RETURN VALUE¶

On success, 0 is returned. On error, -1 is returned and errno is set appropriately.

ERRORS¶

EAGAIN

AFU device opened with O_NONBLOCK, and no data immediately available.

EINTR

Interrupted read() system call.

EINVAL

Invalid argument value, or AFU not opened.

EIO

Unrecoverable error.

ENODATA

No data returned by read().

ENOMEM

Insufficient memory.

FILES¶

/dev/cxl/afu<i>.<j>d

AFU device in dedicated process mode.

/dev/cxl/afu<i>.<j>m

AFU device in AFU directed mode, master context.

/dev/cxl/afu<i>.<j>s

AFU device in AFU directed mode, slave context.

SEE ALSO¶

cxl(3), cxl_afu_fd_to_h(3), cxl_afu_open_dev(3), cxl_afu_open_h(3), cxl_afu_opened(3), cxl_fprint_event(3), cxl_fprint_unknown_event(3), cxl_event_pending(3), cxl_read_expected_event(3), open(2), read(2)