RELEASE_FIRMWARE(9) Device drivers infrastructure RELEASE_FIRMWARE(9)NAME
release_firmware - release the resource associated with a firmware image
void release_firmware(const struct firmware * fw);
firmware resource to release
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 RELEASE_FIRMWARE(9)
Check Out this Related Man Page
FIRMLOAD(9) BSD Kernel Developer's Manual FIRMLOAD(9)NAME
firmload -- Firmware loader API for device drivers
firmware_open(const char *drvname, const char *imgname, firmware_handle_t *fhp);
firmware_read(firmware_handle_t fh, off_t offset, void *buf, size_t size);
firmware_free(void *buf, size_t size);
firmload provides a simple and convenient API for device drivers to load firmware images from files residing in the file system that are nec-
essary for the devices that they control. Firmware images reside in sub-directories, one for each driver, of a series of colon-separated
path prefixes specified by the sysctl variable hw.firmware.path.
The following functions are provided by the firmload API:
firmware_open(drvname, imgname, fhp)
Open then firmware image imgname for the driver drvname. The path to the firmware image file is constructed by appending the string
``/drvname/imgname'' to each configured path prefix until opening the firmware image file succeeds. Upon success, firmware_open()
returns 0 and stores a firmware image handle in the location pointed to by fhp. Otherwise, an error code is returned to indicate the
reason for failure.
Close the firmware image file associated with the firmware handle fh. Returns 0 upon success or an error code to indicate the reason
Returns the size of the image file associated with the firmware handle fh.
firmware_read(fh, offset, buf, size)
Reads from the image file associated with the firmware handle fh beginning at offset offset for length size. The firmware image data
is placed into the buffer specified by buf. Returns 0 upon success or an error code to indicate the reason for failure.
Allocates a region of wired kernel memory of size size. Note: firmware_malloc() may block.
Frees a region of memory previously allocated by firmware_malloc().
SEE ALSO autoconf(9), malloc(9), vnsubr(9)HISTORY
The firmload framework first appeared in NetBSD 4.0.
Jason Thorpe <thorpej@NetBSD.org>
BSD January 17, 2006 BSD
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