NAME¶

cxl_afu_open_dev - open an AFU by device name

SYNOPSIS¶

#include <libcxl.h>

struct cxl_afu_h cxl_afu_open_dev(char *path);

DESCRIPTION¶

cxl_afu_open_dev() opens the device path and returns an AFU handle.

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¶

ENODEV

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

ENOENT

Device does not exist.

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_full(3), cxl_afu_attach_work(3), cxl_afu_dev_name(3), cxl_afu_fd(3), cxl_afu_fd_to_h(3), cxl_afu_free(3), cxl_afu_get_process_element(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)