NAME

cxl_afu_fd_to_h - create an AFU handle from the file descriptor of an already open AFU

SYNOPSIS

#include <libcxl.h>

struct cxl_afu_h cxl_afu_fd_to_h(int fd);

DESCRIPTION

cxl_afu_fd_to_h() returns an AFU handle from the already open AFU device associated to the file descriptor fd.

A dedicated process mode AFU only has one context and only allows the device to be opened once. An AFU directed mode AFU can have many contexts, the device can be opened once for each context that is available.

RETURN VALUE

On success, an AFU handle is returned. On error, NULL is returned, and errno is set appropriately.

ERRORS

EBADF

Bad file descriptor.

ENODEV

Kernel does not support CXL devices, or device is not an AFU.

ENOMEM

Insufficient memory.

ENOSPC

No AFU context available.

EPROTO

Unsupported kernel CXL API version.

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_attach(3), cxl_afu_attach_work(3), cxl_afu_attach_full(3), cxl_afu_dev_name(3), cxl_afu_fd(3), cxl_afu_free(3), cxl_afu_get_process_element(3), cxl_afu_open_dev(3), cxl_afu_open_h(3), cxl_afu_opened(3), cxl_get_api_version(3), cxl_get_api_version_compatible(3), cxl_get_cr_class(3), cxl_get_cr_device(3), cxl_get_cr_vendor(3), cxl_get_mode(3), cxl_get_modes_supported(3), cxl_read_event(3), cxl_read_expected_event(3), cxl_set_mode(3), open(2)