1 /* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12 /* 13 * Copyright 2022 Oxide Computer Company 14 */ 15 16 /* 17 * Our goal is to create the /dev/dpio/%s links that need to exist for each 18 * dpio(7) related entry. The kgpio driver creates a minor node for each dpio of 19 * the form 'dpio:<name>' and uses the type DDI_NT_GPIO_DPIO. For exmaple, the 20 * name 'dpio:foobar' would cause us to create /dev/dpio/foobar. 21 */ 22 23 #include <devfsadm.h> 24 #include <string.h> 25 26 static int 27 dpio_link(di_minor_t minor, di_node_t node) 28 { 29 const char *name, *colon; 30 char buf[PATH_MAX]; 31 32 name = di_minor_name(minor); 33 if (name == NULL) { 34 return (DEVFSADM_CONTINUE); 35 } 36 37 colon = strchr(name, ':'); 38 if (colon == NULL) { 39 return (DEVFSADM_CONTINUE); 40 } 41 42 if (snprintf(buf, sizeof (buf), "dpio/%s", colon + 1) < sizeof (buf)) { 43 (void) devfsadm_mklink(buf, node, minor, 0); 44 } 45 46 return (DEVFSADM_CONTINUE); 47 } 48 49 static devfsadm_create_t dpio_create_cbt[] = { 50 { "pseudo", DDI_NT_GPIO_DPIO, "kgpio", TYPE_EXACT | DRV_EXACT, ILEVEL_0, 51 dpio_link } 52 }; 53 54 static devfsadm_remove_t dpio_remove_cbt[] = { 55 { "pseudo", "^dpio/[A-Za-z0-9]+$", RM_POST | RM_HOT | RM_ALWAYS, 56 ILEVEL_0, devfsadm_rm_all }, 57 }; 58 59 DEVFSADM_CREATE_INIT_V0(dpio_create_cbt); 60 DEVFSADM_REMOVE_INIT_V0(dpio_remove_cbt); 61