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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2022 Oxide Computer Company
*/
/*
* Our goal is to create the /dev/dpio/%s links that need to exist for each
* dpio(7) related entry. The kgpio driver creates a minor node for each dpio of
* the form 'dpio:<name>' and uses the type DDI_NT_GPIO_DPIO. For exmaple, the
* name 'dpio:foobar' would cause us to create /dev/dpio/foobar.
*/
#include <devfsadm.h>
#include <string.h>
static int
dpio_link(di_minor_t minor, di_node_t node)
{
const char *name, *colon;
char buf[PATH_MAX];
name = di_minor_name(minor);
if (name == NULL) {
return (DEVFSADM_CONTINUE);
}
colon = strchr(name, ':');
if (colon == NULL) {
return (DEVFSADM_CONTINUE);
}
if (snprintf(buf, sizeof (buf), "dpio/%s", colon + 1) < sizeof (buf)) {
(void) devfsadm_mklink(buf, node, minor, 0);
}
return (DEVFSADM_CONTINUE);
}
static devfsadm_create_t dpio_create_cbt[] = {
{ "pseudo", DDI_NT_GPIO_DPIO, "kgpio", TYPE_EXACT | DRV_EXACT, ILEVEL_0,
dpio_link }
};
static devfsadm_remove_t dpio_remove_cbt[] = {
{ "pseudo", "^dpio/[A-Za-z0-9]+$", RM_POST | RM_HOT | RM_ALWAYS,
ILEVEL_0, devfsadm_rm_all },
};
DEVFSADM_CREATE_INIT_V0(dpio_create_cbt);
DEVFSADM_REMOVE_INIT_V0(dpio_remove_cbt);
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