Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Derived from arch/i386/kernel/irq.c |
| 3 | * Copyright (C) 1992 Linus Torvalds |
| 4 | * Adapted from arch/i386 by Gary Thomas |
| 5 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) |
| 6 | * Updated and modified by Cort Dougan <cort@fsmlabs.com> |
| 7 | * Copyright (C) 1996-2001 Cort Dougan |
| 8 | * Adapted for Power Macintosh by Paul Mackerras |
| 9 | * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au) |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License |
| 13 | * as published by the Free Software Foundation; either version |
| 14 | * 2 of the License, or (at your option) any later version. |
| 15 | * |
| 16 | * This file contains the code used to make IRQ descriptions in the |
| 17 | * device tree to actual irq numbers on an interrupt controller |
| 18 | * driver. |
| 19 | */ |
| 20 | |
Marc Zyngier | c706c23 | 2015-07-28 14:46:15 +0100 | [diff] [blame] | 21 | #include <linux/device.h> |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 22 | #include <linux/errno.h> |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 23 | #include <linux/list.h> |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/of.h> |
| 26 | #include <linux/of_irq.h> |
| 27 | #include <linux/string.h> |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 28 | #include <linux/slab.h> |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 29 | |
| 30 | /** |
| 31 | * irq_of_parse_and_map - Parse and map an interrupt into linux virq space |
Yijing Wang | d84ff46 | 2013-08-31 09:44:10 +0800 | [diff] [blame] | 32 | * @dev: Device node of the device whose interrupt is to be mapped |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 33 | * @index: Index of the interrupt to map |
| 34 | * |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 35 | * This function is a wrapper that chains of_irq_parse_one() and |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 36 | * irq_create_of_mapping() to make things easier to callers |
| 37 | */ |
| 38 | unsigned int irq_of_parse_and_map(struct device_node *dev, int index) |
| 39 | { |
Grant Likely | 530210c | 2013-09-15 16:39:11 +0100 | [diff] [blame] | 40 | struct of_phandle_args oirq; |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 41 | |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 42 | if (of_irq_parse_one(dev, index, &oirq)) |
Anton Vorontsov | 77a7300 | 2011-12-07 03:16:26 +0400 | [diff] [blame] | 43 | return 0; |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 44 | |
Grant Likely | e6d30ab | 2013-09-15 16:55:53 +0100 | [diff] [blame] | 45 | return irq_create_of_mapping(&oirq); |
Grant Likely | e387344 | 2010-06-18 11:09:59 -0600 | [diff] [blame] | 46 | } |
| 47 | EXPORT_SYMBOL_GPL(irq_of_parse_and_map); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 48 | |
| 49 | /** |
| 50 | * of_irq_find_parent - Given a device node, find its interrupt parent node |
| 51 | * @child: pointer to device node |
| 52 | * |
| 53 | * Returns a pointer to the interrupt parent node, or NULL if the interrupt |
| 54 | * parent could not be determined. |
| 55 | */ |
Carlo Caione | 4c3141e | 2015-12-01 17:24:17 +0100 | [diff] [blame] | 56 | struct device_node *of_irq_find_parent(struct device_node *child) |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 57 | { |
Linus Torvalds | b4bbb02 | 2011-11-22 15:09:20 -0800 | [diff] [blame] | 58 | struct device_node *p; |
Grant Likely | 9a6b2e5 | 2010-07-23 01:48:25 -0600 | [diff] [blame] | 59 | const __be32 *parp; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 60 | |
Linus Torvalds | b4bbb02 | 2011-11-22 15:09:20 -0800 | [diff] [blame] | 61 | if (!of_node_get(child)) |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 62 | return NULL; |
| 63 | |
| 64 | do { |
Linus Torvalds | b4bbb02 | 2011-11-22 15:09:20 -0800 | [diff] [blame] | 65 | parp = of_get_property(child, "interrupt-parent", NULL); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 66 | if (parp == NULL) |
Linus Torvalds | b4bbb02 | 2011-11-22 15:09:20 -0800 | [diff] [blame] | 67 | p = of_get_parent(child); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 68 | else { |
| 69 | if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) |
| 70 | p = of_node_get(of_irq_dflt_pic); |
| 71 | else |
Grant Likely | 9a6b2e5 | 2010-07-23 01:48:25 -0600 | [diff] [blame] | 72 | p = of_find_node_by_phandle(be32_to_cpup(parp)); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 73 | } |
Linus Torvalds | b4bbb02 | 2011-11-22 15:09:20 -0800 | [diff] [blame] | 74 | of_node_put(child); |
| 75 | child = p; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 76 | } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL); |
| 77 | |
Linus Torvalds | b4bbb02 | 2011-11-22 15:09:20 -0800 | [diff] [blame] | 78 | return p; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 79 | } |
Carlo Caione | 4c3141e | 2015-12-01 17:24:17 +0100 | [diff] [blame] | 80 | EXPORT_SYMBOL_GPL(of_irq_find_parent); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 81 | |
| 82 | /** |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 83 | * of_irq_parse_raw - Low level interrupt tree parsing |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 84 | * @parent: the device interrupt parent |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 85 | * @addr: address specifier (start of "reg" property of the device) in be32 format |
| 86 | * @out_irq: structure of_irq updated by this function |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 87 | * |
| 88 | * Returns 0 on success and a negative number on error |
| 89 | * |
| 90 | * This function is a low-level interrupt tree walking function. It |
| 91 | * can be used to do a partial walk with synthetized reg and interrupts |
| 92 | * properties, for example when resolving PCI interrupts when no device |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 93 | * node exist for the parent. It takes an interrupt specifier structure as |
| 94 | * input, walks the tree looking for any interrupt-map properties, translates |
| 95 | * the specifier for each map, and then returns the translated map. |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 96 | */ |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 97 | int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq) |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 98 | { |
| 99 | struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL; |
Grant Likely | 355e62f | 2013-11-02 00:11:02 -0700 | [diff] [blame] | 100 | __be32 initial_match_array[MAX_PHANDLE_ARGS]; |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 101 | const __be32 *match_array = initial_match_array; |
Grant Likely | 355e62f | 2013-11-02 00:11:02 -0700 | [diff] [blame] | 102 | const __be32 *tmp, *imap, *imask, dummy_imask[] = { [0 ... MAX_PHANDLE_ARGS] = ~0 }; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 103 | u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0; |
| 104 | int imaplen, match, i; |
| 105 | |
Grant Likely | 624cfca | 2013-10-11 22:05:10 +0100 | [diff] [blame] | 106 | #ifdef DEBUG |
| 107 | of_print_phandle_args("of_irq_parse_raw: ", out_irq); |
| 108 | #endif |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 109 | |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 110 | ipar = of_node_get(out_irq->np); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 111 | |
| 112 | /* First get the #interrupt-cells property of the current cursor |
| 113 | * that tells us how to interpret the passed-in intspec. If there |
| 114 | * is none, we are nice and just walk up the tree |
| 115 | */ |
| 116 | do { |
| 117 | tmp = of_get_property(ipar, "#interrupt-cells", NULL); |
| 118 | if (tmp != NULL) { |
Rob Herring | a7c194b | 2010-06-08 07:48:08 -0600 | [diff] [blame] | 119 | intsize = be32_to_cpu(*tmp); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 120 | break; |
| 121 | } |
| 122 | tnode = ipar; |
| 123 | ipar = of_irq_find_parent(ipar); |
| 124 | of_node_put(tnode); |
| 125 | } while (ipar); |
| 126 | if (ipar == NULL) { |
| 127 | pr_debug(" -> no parent found !\n"); |
| 128 | goto fail; |
| 129 | } |
| 130 | |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 131 | pr_debug("of_irq_parse_raw: ipar=%s, size=%d\n", of_node_full_name(ipar), intsize); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 132 | |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 133 | if (out_irq->args_count != intsize) |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 134 | return -EINVAL; |
| 135 | |
| 136 | /* Look for this #address-cells. We have to implement the old linux |
| 137 | * trick of looking for the parent here as some device-trees rely on it |
| 138 | */ |
| 139 | old = of_node_get(ipar); |
| 140 | do { |
| 141 | tmp = of_get_property(old, "#address-cells", NULL); |
| 142 | tnode = of_get_parent(old); |
| 143 | of_node_put(old); |
| 144 | old = tnode; |
| 145 | } while (old && tmp == NULL); |
| 146 | of_node_put(old); |
| 147 | old = NULL; |
Rob Herring | a7c194b | 2010-06-08 07:48:08 -0600 | [diff] [blame] | 148 | addrsize = (tmp == NULL) ? 2 : be32_to_cpu(*tmp); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 149 | |
| 150 | pr_debug(" -> addrsize=%d\n", addrsize); |
| 151 | |
Grant Likely | 355e62f | 2013-11-02 00:11:02 -0700 | [diff] [blame] | 152 | /* Range check so that the temporary buffer doesn't overflow */ |
| 153 | if (WARN_ON(addrsize + intsize > MAX_PHANDLE_ARGS)) |
| 154 | goto fail; |
| 155 | |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 156 | /* Precalculate the match array - this simplifies match loop */ |
| 157 | for (i = 0; i < addrsize; i++) |
Grant Likely | 78119fd | 2013-11-01 10:50:50 -0700 | [diff] [blame] | 158 | initial_match_array[i] = addr ? addr[i] : 0; |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 159 | for (i = 0; i < intsize; i++) |
| 160 | initial_match_array[addrsize + i] = cpu_to_be32(out_irq->args[i]); |
| 161 | |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 162 | /* Now start the actual "proper" walk of the interrupt tree */ |
| 163 | while (ipar != NULL) { |
| 164 | /* Now check if cursor is an interrupt-controller and if it is |
| 165 | * then we are done |
| 166 | */ |
| 167 | if (of_get_property(ipar, "interrupt-controller", NULL) != |
| 168 | NULL) { |
| 169 | pr_debug(" -> got it !\n"); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 170 | return 0; |
| 171 | } |
| 172 | |
Grant Likely | 78119fd | 2013-11-01 10:50:50 -0700 | [diff] [blame] | 173 | /* |
| 174 | * interrupt-map parsing does not work without a reg |
| 175 | * property when #address-cells != 0 |
| 176 | */ |
| 177 | if (addrsize && !addr) { |
| 178 | pr_debug(" -> no reg passed in when needed !\n"); |
| 179 | goto fail; |
| 180 | } |
| 181 | |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 182 | /* Now look for an interrupt-map */ |
| 183 | imap = of_get_property(ipar, "interrupt-map", &imaplen); |
| 184 | /* No interrupt map, check for an interrupt parent */ |
| 185 | if (imap == NULL) { |
| 186 | pr_debug(" -> no map, getting parent\n"); |
| 187 | newpar = of_irq_find_parent(ipar); |
| 188 | goto skiplevel; |
| 189 | } |
| 190 | imaplen /= sizeof(u32); |
| 191 | |
| 192 | /* Look for a mask */ |
| 193 | imask = of_get_property(ipar, "interrupt-map-mask", NULL); |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 194 | if (!imask) |
| 195 | imask = dummy_imask; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 196 | |
| 197 | /* Parse interrupt-map */ |
| 198 | match = 0; |
| 199 | while (imaplen > (addrsize + intsize + 1) && !match) { |
| 200 | /* Compare specifiers */ |
| 201 | match = 1; |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 202 | for (i = 0; i < (addrsize + intsize); i++, imaplen--) |
Tomasz Figa | 74dac2e | 2013-11-05 16:21:18 +0100 | [diff] [blame] | 203 | match &= !((match_array[i] ^ *imap++) & imask[i]); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 204 | |
| 205 | pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen); |
| 206 | |
| 207 | /* Get the interrupt parent */ |
| 208 | if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) |
| 209 | newpar = of_node_get(of_irq_dflt_pic); |
| 210 | else |
Grant Likely | 9a6b2e5 | 2010-07-23 01:48:25 -0600 | [diff] [blame] | 211 | newpar = of_find_node_by_phandle(be32_to_cpup(imap)); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 212 | imap++; |
| 213 | --imaplen; |
| 214 | |
| 215 | /* Check if not found */ |
| 216 | if (newpar == NULL) { |
| 217 | pr_debug(" -> imap parent not found !\n"); |
| 218 | goto fail; |
| 219 | } |
| 220 | |
Peter Crosthwaite | 1ca56e7 | 2013-11-27 23:26:12 -0800 | [diff] [blame] | 221 | if (!of_device_is_available(newpar)) |
| 222 | match = 0; |
| 223 | |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 224 | /* Get #interrupt-cells and #address-cells of new |
| 225 | * parent |
| 226 | */ |
| 227 | tmp = of_get_property(newpar, "#interrupt-cells", NULL); |
| 228 | if (tmp == NULL) { |
| 229 | pr_debug(" -> parent lacks #interrupt-cells!\n"); |
| 230 | goto fail; |
| 231 | } |
Rob Herring | a7c194b | 2010-06-08 07:48:08 -0600 | [diff] [blame] | 232 | newintsize = be32_to_cpu(*tmp); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 233 | tmp = of_get_property(newpar, "#address-cells", NULL); |
Rob Herring | a7c194b | 2010-06-08 07:48:08 -0600 | [diff] [blame] | 234 | newaddrsize = (tmp == NULL) ? 0 : be32_to_cpu(*tmp); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 235 | |
| 236 | pr_debug(" -> newintsize=%d, newaddrsize=%d\n", |
| 237 | newintsize, newaddrsize); |
| 238 | |
| 239 | /* Check for malformed properties */ |
Grant Likely | 355e62f | 2013-11-02 00:11:02 -0700 | [diff] [blame] | 240 | if (WARN_ON(newaddrsize + newintsize > MAX_PHANDLE_ARGS)) |
| 241 | goto fail; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 242 | if (imaplen < (newaddrsize + newintsize)) |
| 243 | goto fail; |
| 244 | |
| 245 | imap += newaddrsize + newintsize; |
| 246 | imaplen -= newaddrsize + newintsize; |
| 247 | |
| 248 | pr_debug(" -> imaplen=%d\n", imaplen); |
| 249 | } |
| 250 | if (!match) |
| 251 | goto fail; |
| 252 | |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 253 | /* |
| 254 | * Successfully parsed an interrrupt-map translation; copy new |
| 255 | * interrupt specifier into the out_irq structure |
| 256 | */ |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 257 | match_array = imap - newaddrsize - newintsize; |
| 258 | for (i = 0; i < newintsize; i++) |
| 259 | out_irq->args[i] = be32_to_cpup(imap - newintsize + i); |
| 260 | out_irq->args_count = intsize = newintsize; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 261 | addrsize = newaddrsize; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 262 | |
| 263 | skiplevel: |
| 264 | /* Iterate again with new parent */ |
Jeremy Linton | d23b251 | 2015-06-29 18:50:55 -0500 | [diff] [blame] | 265 | out_irq->np = newpar; |
Grant Likely | 74a7f08 | 2012-06-15 11:50:25 -0600 | [diff] [blame] | 266 | pr_debug(" -> new parent: %s\n", of_node_full_name(newpar)); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 267 | of_node_put(ipar); |
| 268 | ipar = newpar; |
| 269 | newpar = NULL; |
| 270 | } |
| 271 | fail: |
| 272 | of_node_put(ipar); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 273 | of_node_put(newpar); |
| 274 | |
| 275 | return -EINVAL; |
| 276 | } |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 277 | EXPORT_SYMBOL_GPL(of_irq_parse_raw); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 278 | |
| 279 | /** |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 280 | * of_irq_parse_one - Resolve an interrupt for a device |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 281 | * @device: the device whose interrupt is to be resolved |
| 282 | * @index: index of the interrupt to resolve |
| 283 | * @out_irq: structure of_irq filled by this function |
| 284 | * |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 285 | * This function resolves an interrupt for a node by walking the interrupt tree, |
| 286 | * finding which interrupt controller node it is attached to, and returning the |
| 287 | * interrupt specifier that can be used to retrieve a Linux IRQ number. |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 288 | */ |
Grant Likely | 530210c | 2013-09-15 16:39:11 +0100 | [diff] [blame] | 289 | int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_args *out_irq) |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 290 | { |
| 291 | struct device_node *p; |
Grant Likely | d2f7183 | 2010-07-23 16:56:19 -0600 | [diff] [blame] | 292 | const __be32 *intspec, *tmp, *addr; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 293 | u32 intsize, intlen; |
Laurent Pinchart | d7c1460 | 2015-03-18 00:21:32 +0200 | [diff] [blame] | 294 | int i, res; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 295 | |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 296 | pr_debug("of_irq_parse_one: dev=%s, index=%d\n", of_node_full_name(device), index); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 297 | |
| 298 | /* OldWorld mac stuff is "special", handle out of line */ |
| 299 | if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 300 | return of_irq_parse_oldworld(device, index, out_irq); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 301 | |
Grant Likely | 79d9701 | 2013-09-19 16:47:37 -0500 | [diff] [blame] | 302 | /* Get the reg property (if any) */ |
| 303 | addr = of_get_property(device, "reg", NULL); |
| 304 | |
Florian Fainelli | a9ecdc0 | 2014-08-06 13:02:27 -0700 | [diff] [blame] | 305 | /* Try the new-style interrupts-extended first */ |
| 306 | res = of_parse_phandle_with_args(device, "interrupts-extended", |
| 307 | "#interrupt-cells", index, out_irq); |
| 308 | if (!res) |
| 309 | return of_irq_parse_raw(addr, out_irq); |
| 310 | |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 311 | /* Get the interrupts property */ |
| 312 | intspec = of_get_property(device, "interrupts", &intlen); |
Florian Fainelli | a9ecdc0 | 2014-08-06 13:02:27 -0700 | [diff] [blame] | 313 | if (intspec == NULL) |
| 314 | return -EINVAL; |
| 315 | |
Grant Likely | d2f7183 | 2010-07-23 16:56:19 -0600 | [diff] [blame] | 316 | intlen /= sizeof(*intspec); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 317 | |
Grant Likely | d2f7183 | 2010-07-23 16:56:19 -0600 | [diff] [blame] | 318 | pr_debug(" intspec=%d intlen=%d\n", be32_to_cpup(intspec), intlen); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 319 | |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 320 | /* Look for the interrupt parent. */ |
| 321 | p = of_irq_find_parent(device); |
| 322 | if (p == NULL) |
| 323 | return -EINVAL; |
| 324 | |
| 325 | /* Get size of interrupt specifier */ |
| 326 | tmp = of_get_property(p, "#interrupt-cells", NULL); |
Laurent Pinchart | d7c1460 | 2015-03-18 00:21:32 +0200 | [diff] [blame] | 327 | if (tmp == NULL) { |
| 328 | res = -EINVAL; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 329 | goto out; |
Laurent Pinchart | d7c1460 | 2015-03-18 00:21:32 +0200 | [diff] [blame] | 330 | } |
Rob Herring | a7c194b | 2010-06-08 07:48:08 -0600 | [diff] [blame] | 331 | intsize = be32_to_cpu(*tmp); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 332 | |
| 333 | pr_debug(" intsize=%d intlen=%d\n", intsize, intlen); |
| 334 | |
| 335 | /* Check index */ |
Laurent Pinchart | d7c1460 | 2015-03-18 00:21:32 +0200 | [diff] [blame] | 336 | if ((index + 1) * intsize > intlen) { |
| 337 | res = -EINVAL; |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 338 | goto out; |
Laurent Pinchart | d7c1460 | 2015-03-18 00:21:32 +0200 | [diff] [blame] | 339 | } |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 340 | |
Grant Likely | 2361613 | 2013-09-15 22:32:39 +0100 | [diff] [blame] | 341 | /* Copy intspec into irq structure */ |
| 342 | intspec += index * intsize; |
| 343 | out_irq->np = p; |
| 344 | out_irq->args_count = intsize; |
| 345 | for (i = 0; i < intsize; i++) |
| 346 | out_irq->args[i] = be32_to_cpup(intspec++); |
| 347 | |
| 348 | /* Check if there are any interrupt-map translations to process */ |
| 349 | res = of_irq_parse_raw(addr, out_irq); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 350 | out: |
| 351 | of_node_put(p); |
| 352 | return res; |
| 353 | } |
Grant Likely | 0c02c80 | 2013-09-19 11:22:36 -0500 | [diff] [blame] | 354 | EXPORT_SYMBOL_GPL(of_irq_parse_one); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 355 | |
| 356 | /** |
| 357 | * of_irq_to_resource - Decode a node's IRQ and return it as a resource |
| 358 | * @dev: pointer to device tree node |
| 359 | * @index: zero-based index of the irq |
| 360 | * @r: pointer to resource structure to return result into. |
| 361 | */ |
| 362 | int of_irq_to_resource(struct device_node *dev, int index, struct resource *r) |
| 363 | { |
| 364 | int irq = irq_of_parse_and_map(dev, index); |
| 365 | |
| 366 | /* Only dereference the resource if both the |
| 367 | * resource and the irq are valid. */ |
Anton Vorontsov | 77a7300 | 2011-12-07 03:16:26 +0400 | [diff] [blame] | 368 | if (r && irq) { |
Benoit Cousson | 661db79 | 2011-12-05 15:23:56 +0100 | [diff] [blame] | 369 | const char *name = NULL; |
| 370 | |
Sebastian Andrzej Siewior | cf9e236 | 2013-07-18 12:24:10 +0200 | [diff] [blame] | 371 | memset(r, 0, sizeof(*r)); |
Benoit Cousson | 661db79 | 2011-12-05 15:23:56 +0100 | [diff] [blame] | 372 | /* |
Geert Uytterhoeven | ae107d0 | 2014-04-22 20:40:25 +0200 | [diff] [blame] | 373 | * Get optional "interrupt-names" property to add a name |
Benoit Cousson | 661db79 | 2011-12-05 15:23:56 +0100 | [diff] [blame] | 374 | * to the resource. |
| 375 | */ |
| 376 | of_property_read_string_index(dev, "interrupt-names", index, |
| 377 | &name); |
| 378 | |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 379 | r->start = r->end = irq; |
Tomasz Figa | 4a43d68 | 2013-09-28 19:52:51 +0200 | [diff] [blame] | 380 | r->flags = IORESOURCE_IRQ | irqd_get_trigger_type(irq_get_irq_data(irq)); |
Grant Likely | 8804827 | 2013-09-19 11:01:52 -0500 | [diff] [blame] | 381 | r->name = name ? name : of_node_full_name(dev); |
Grant Likely | 7dc2e11 | 2010-06-08 07:48:06 -0600 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | return irq; |
| 385 | } |
| 386 | EXPORT_SYMBOL_GPL(of_irq_to_resource); |
Andres Salomon | 52f6537 | 2010-10-10 21:35:05 -0600 | [diff] [blame] | 387 | |
| 388 | /** |
Rob Herring | 9ec36ca | 2014-04-23 17:57:41 -0500 | [diff] [blame] | 389 | * of_irq_get - Decode a node's IRQ and return it as a Linux irq number |
| 390 | * @dev: pointer to device tree node |
| 391 | * @index: zero-based index of the irq |
| 392 | * |
| 393 | * Returns Linux irq number on success, or -EPROBE_DEFER if the irq domain |
| 394 | * is not yet created. |
| 395 | * |
| 396 | */ |
| 397 | int of_irq_get(struct device_node *dev, int index) |
| 398 | { |
| 399 | int rc; |
| 400 | struct of_phandle_args oirq; |
| 401 | struct irq_domain *domain; |
| 402 | |
| 403 | rc = of_irq_parse_one(dev, index, &oirq); |
| 404 | if (rc) |
| 405 | return rc; |
| 406 | |
| 407 | domain = irq_find_host(oirq.np); |
| 408 | if (!domain) |
| 409 | return -EPROBE_DEFER; |
| 410 | |
| 411 | return irq_create_of_mapping(&oirq); |
| 412 | } |
Laurent Pinchart | 9eb08fb | 2014-10-30 15:59:36 +0200 | [diff] [blame] | 413 | EXPORT_SYMBOL_GPL(of_irq_get); |
Rob Herring | 9ec36ca | 2014-04-23 17:57:41 -0500 | [diff] [blame] | 414 | |
| 415 | /** |
Grygorii Strashko | ad69674 | 2014-05-20 13:42:02 +0300 | [diff] [blame] | 416 | * of_irq_get_byname - Decode a node's IRQ and return it as a Linux irq number |
| 417 | * @dev: pointer to device tree node |
| 418 | * @name: irq name |
| 419 | * |
| 420 | * Returns Linux irq number on success, or -EPROBE_DEFER if the irq domain |
| 421 | * is not yet created, or error code in case of any other failure. |
| 422 | */ |
| 423 | int of_irq_get_byname(struct device_node *dev, const char *name) |
| 424 | { |
| 425 | int index; |
| 426 | |
| 427 | if (unlikely(!name)) |
| 428 | return -EINVAL; |
| 429 | |
| 430 | index = of_property_match_string(dev, "interrupt-names", name); |
| 431 | if (index < 0) |
| 432 | return index; |
| 433 | |
| 434 | return of_irq_get(dev, index); |
| 435 | } |
Dmitry Torokhov | 6602c45 | 2015-08-25 17:04:02 -0700 | [diff] [blame] | 436 | EXPORT_SYMBOL_GPL(of_irq_get_byname); |
Grygorii Strashko | ad69674 | 2014-05-20 13:42:02 +0300 | [diff] [blame] | 437 | |
| 438 | /** |
Andres Salomon | 52f6537 | 2010-10-10 21:35:05 -0600 | [diff] [blame] | 439 | * of_irq_count - Count the number of IRQs a node uses |
| 440 | * @dev: pointer to device tree node |
| 441 | */ |
| 442 | int of_irq_count(struct device_node *dev) |
| 443 | { |
Thierry Reding | 3da5278 | 2013-09-18 15:24:43 +0200 | [diff] [blame] | 444 | struct of_phandle_args irq; |
Andres Salomon | 52f6537 | 2010-10-10 21:35:05 -0600 | [diff] [blame] | 445 | int nr = 0; |
| 446 | |
Thierry Reding | 3da5278 | 2013-09-18 15:24:43 +0200 | [diff] [blame] | 447 | while (of_irq_parse_one(dev, nr, &irq) == 0) |
Andres Salomon | 52f6537 | 2010-10-10 21:35:05 -0600 | [diff] [blame] | 448 | nr++; |
| 449 | |
| 450 | return nr; |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * of_irq_to_resource_table - Fill in resource table with node's IRQ info |
| 455 | * @dev: pointer to device tree node |
| 456 | * @res: array of resources to fill in |
| 457 | * @nr_irqs: the number of IRQs (and upper bound for num of @res elements) |
| 458 | * |
| 459 | * Returns the size of the filled in table (up to @nr_irqs). |
| 460 | */ |
| 461 | int of_irq_to_resource_table(struct device_node *dev, struct resource *res, |
| 462 | int nr_irqs) |
| 463 | { |
| 464 | int i; |
| 465 | |
| 466 | for (i = 0; i < nr_irqs; i++, res++) |
Anton Vorontsov | 77a7300 | 2011-12-07 03:16:26 +0400 | [diff] [blame] | 467 | if (!of_irq_to_resource(dev, i, res)) |
Andres Salomon | 52f6537 | 2010-10-10 21:35:05 -0600 | [diff] [blame] | 468 | break; |
| 469 | |
| 470 | return i; |
| 471 | } |
John Crispin | a4f8bf2 | 2012-08-26 09:13:09 +0200 | [diff] [blame] | 472 | EXPORT_SYMBOL_GPL(of_irq_to_resource_table); |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 473 | |
Geert Uytterhoeven | 48a9b73 | 2015-06-26 14:42:45 +0200 | [diff] [blame] | 474 | struct of_intc_desc { |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 475 | struct list_head list; |
Masahiro Yamada | 264041e | 2015-11-24 22:10:26 +0900 | [diff] [blame] | 476 | of_irq_init_cb_t irq_init_cb; |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 477 | struct device_node *dev; |
| 478 | struct device_node *interrupt_parent; |
| 479 | }; |
| 480 | |
| 481 | /** |
| 482 | * of_irq_init - Scan and init matching interrupt controllers in DT |
| 483 | * @matches: 0 terminated array of nodes to match and init function to call |
| 484 | * |
| 485 | * This function scans the device tree for matching interrupt controller nodes, |
| 486 | * and calls their initialization functions in order with parents first. |
| 487 | */ |
| 488 | void __init of_irq_init(const struct of_device_id *matches) |
| 489 | { |
Masahiro Yamada | 264041e | 2015-11-24 22:10:26 +0900 | [diff] [blame] | 490 | const struct of_device_id *match; |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 491 | struct device_node *np, *parent = NULL; |
Geert Uytterhoeven | 48a9b73 | 2015-06-26 14:42:45 +0200 | [diff] [blame] | 492 | struct of_intc_desc *desc, *temp_desc; |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 493 | struct list_head intc_desc_list, intc_parent_list; |
| 494 | |
| 495 | INIT_LIST_HEAD(&intc_desc_list); |
| 496 | INIT_LIST_HEAD(&intc_parent_list); |
| 497 | |
Masahiro Yamada | 264041e | 2015-11-24 22:10:26 +0900 | [diff] [blame] | 498 | for_each_matching_node_and_match(np, matches, &match) { |
Peter Crosthwaite | bf49be0 | 2013-11-27 23:26:13 -0800 | [diff] [blame] | 499 | if (!of_find_property(np, "interrupt-controller", NULL) || |
| 500 | !of_device_is_available(np)) |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 501 | continue; |
Masahiro Yamada | 264041e | 2015-11-24 22:10:26 +0900 | [diff] [blame] | 502 | |
| 503 | if (WARN(!match->data, "of_irq_init: no init function for %s\n", |
| 504 | match->compatible)) |
| 505 | continue; |
| 506 | |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 507 | /* |
Geert Uytterhoeven | 48a9b73 | 2015-06-26 14:42:45 +0200 | [diff] [blame] | 508 | * Here, we allocate and populate an of_intc_desc with the node |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 509 | * pointer, interrupt-parent device_node etc. |
| 510 | */ |
| 511 | desc = kzalloc(sizeof(*desc), GFP_KERNEL); |
Julia Lawall | 8363ccb | 2015-10-22 11:02:51 +0200 | [diff] [blame] | 512 | if (WARN_ON(!desc)) { |
| 513 | of_node_put(np); |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 514 | goto err; |
Julia Lawall | 8363ccb | 2015-10-22 11:02:51 +0200 | [diff] [blame] | 515 | } |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 516 | |
Masahiro Yamada | 264041e | 2015-11-24 22:10:26 +0900 | [diff] [blame] | 517 | desc->irq_init_cb = match->data; |
Julia Lawall | 8363ccb | 2015-10-22 11:02:51 +0200 | [diff] [blame] | 518 | desc->dev = of_node_get(np); |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 519 | desc->interrupt_parent = of_irq_find_parent(np); |
Rob Herring | d7fb6d0 | 2011-11-27 20:16:33 -0600 | [diff] [blame] | 520 | if (desc->interrupt_parent == np) |
| 521 | desc->interrupt_parent = NULL; |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 522 | list_add_tail(&desc->list, &intc_desc_list); |
| 523 | } |
| 524 | |
| 525 | /* |
| 526 | * The root irq controller is the one without an interrupt-parent. |
| 527 | * That one goes first, followed by the controllers that reference it, |
| 528 | * followed by the ones that reference the 2nd level controllers, etc. |
| 529 | */ |
| 530 | while (!list_empty(&intc_desc_list)) { |
| 531 | /* |
| 532 | * Process all controllers with the current 'parent'. |
| 533 | * First pass will be looking for NULL as the parent. |
| 534 | * The assumption is that NULL parent means a root controller. |
| 535 | */ |
| 536 | list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) { |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 537 | int ret; |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 538 | |
| 539 | if (desc->interrupt_parent != parent) |
| 540 | continue; |
| 541 | |
| 542 | list_del(&desc->list); |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 543 | |
Masahiro Yamada | 264041e | 2015-11-24 22:10:26 +0900 | [diff] [blame] | 544 | pr_debug("of_irq_init: init %s (%p), parent %p\n", |
| 545 | desc->dev->full_name, |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 546 | desc->dev, desc->interrupt_parent); |
Masahiro Yamada | 264041e | 2015-11-24 22:10:26 +0900 | [diff] [blame] | 547 | ret = desc->irq_init_cb(desc->dev, |
| 548 | desc->interrupt_parent); |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 549 | if (ret) { |
| 550 | kfree(desc); |
| 551 | continue; |
| 552 | } |
| 553 | |
| 554 | /* |
| 555 | * This one is now set up; add it to the parent list so |
| 556 | * its children can get processed in a subsequent pass. |
| 557 | */ |
| 558 | list_add_tail(&desc->list, &intc_parent_list); |
| 559 | } |
| 560 | |
| 561 | /* Get the next pending parent that might have children */ |
Axel Lin | c0cdfaa | 2013-06-23 15:50:07 +0800 | [diff] [blame] | 562 | desc = list_first_entry_or_null(&intc_parent_list, |
| 563 | typeof(*desc), list); |
| 564 | if (!desc) { |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 565 | pr_err("of_irq_init: children remain, but no parents\n"); |
| 566 | break; |
| 567 | } |
| 568 | list_del(&desc->list); |
| 569 | parent = desc->dev; |
| 570 | kfree(desc); |
| 571 | } |
| 572 | |
| 573 | list_for_each_entry_safe(desc, temp_desc, &intc_parent_list, list) { |
| 574 | list_del(&desc->list); |
| 575 | kfree(desc); |
| 576 | } |
| 577 | err: |
| 578 | list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) { |
| 579 | list_del(&desc->list); |
Julia Lawall | 8363ccb | 2015-10-22 11:02:51 +0200 | [diff] [blame] | 580 | of_node_put(desc->dev); |
Rob Herring | c71a54b | 2011-09-20 15:13:50 -0500 | [diff] [blame] | 581 | kfree(desc); |
| 582 | } |
| 583 | } |
Marc Zyngier | c706c23 | 2015-07-28 14:46:15 +0100 | [diff] [blame] | 584 | |
Marc Zyngier | a251b26 | 2015-10-01 17:05:45 +0100 | [diff] [blame] | 585 | static u32 __of_msi_map_rid(struct device *dev, struct device_node **np, |
| 586 | u32 rid_in) |
David Daney | 8db02d8 | 2015-10-08 15:10:48 -0700 | [diff] [blame] | 587 | { |
| 588 | struct device *parent_dev; |
| 589 | struct device_node *msi_controller_node; |
Marc Zyngier | a251b26 | 2015-10-01 17:05:45 +0100 | [diff] [blame] | 590 | struct device_node *msi_np = *np; |
David Daney | 8db02d8 | 2015-10-08 15:10:48 -0700 | [diff] [blame] | 591 | u32 map_mask, masked_rid, rid_base, msi_base, rid_len, phandle; |
| 592 | int msi_map_len; |
| 593 | bool matched; |
| 594 | u32 rid_out = rid_in; |
| 595 | const __be32 *msi_map = NULL; |
| 596 | |
| 597 | /* |
| 598 | * Walk up the device parent links looking for one with a |
| 599 | * "msi-map" property. |
| 600 | */ |
| 601 | for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent) { |
| 602 | if (!parent_dev->of_node) |
| 603 | continue; |
| 604 | |
| 605 | msi_map = of_get_property(parent_dev->of_node, |
| 606 | "msi-map", &msi_map_len); |
| 607 | if (!msi_map) |
| 608 | continue; |
| 609 | |
| 610 | if (msi_map_len % (4 * sizeof(__be32))) { |
| 611 | dev_err(parent_dev, "Error: Bad msi-map length: %d\n", |
| 612 | msi_map_len); |
| 613 | return rid_out; |
| 614 | } |
| 615 | /* We have a good parent_dev and msi_map, let's use them. */ |
| 616 | break; |
| 617 | } |
| 618 | if (!msi_map) |
| 619 | return rid_out; |
| 620 | |
| 621 | /* The default is to select all bits. */ |
| 622 | map_mask = 0xffffffff; |
| 623 | |
| 624 | /* |
| 625 | * Can be overridden by "msi-map-mask" property. If |
| 626 | * of_property_read_u32() fails, the default is used. |
| 627 | */ |
| 628 | of_property_read_u32(parent_dev->of_node, "msi-map-mask", &map_mask); |
| 629 | |
| 630 | masked_rid = map_mask & rid_in; |
| 631 | matched = false; |
| 632 | while (!matched && msi_map_len >= 4 * sizeof(__be32)) { |
| 633 | rid_base = be32_to_cpup(msi_map + 0); |
| 634 | phandle = be32_to_cpup(msi_map + 1); |
| 635 | msi_base = be32_to_cpup(msi_map + 2); |
| 636 | rid_len = be32_to_cpup(msi_map + 3); |
| 637 | |
Robin Murphy | 5d589d8 | 2016-02-09 11:04:45 +0000 | [diff] [blame^] | 638 | if (rid_base & ~map_mask) { |
| 639 | dev_err(parent_dev, |
| 640 | "Invalid msi-map translation - msi-map-mask (0x%x) ignores rid-base (0x%x)\n", |
| 641 | map_mask, rid_base); |
| 642 | return rid_out; |
| 643 | } |
| 644 | |
David Daney | 8db02d8 | 2015-10-08 15:10:48 -0700 | [diff] [blame] | 645 | msi_controller_node = of_find_node_by_phandle(phandle); |
| 646 | |
Marc Zyngier | a251b26 | 2015-10-01 17:05:45 +0100 | [diff] [blame] | 647 | matched = (masked_rid >= rid_base && |
| 648 | masked_rid < rid_base + rid_len); |
| 649 | if (msi_np) |
| 650 | matched &= msi_np == msi_controller_node; |
| 651 | |
| 652 | if (matched && !msi_np) { |
| 653 | *np = msi_np = msi_controller_node; |
| 654 | break; |
| 655 | } |
David Daney | 8db02d8 | 2015-10-08 15:10:48 -0700 | [diff] [blame] | 656 | |
| 657 | of_node_put(msi_controller_node); |
| 658 | msi_map_len -= 4 * sizeof(__be32); |
| 659 | msi_map += 4; |
| 660 | } |
| 661 | if (!matched) |
| 662 | return rid_out; |
| 663 | |
Robin Murphy | 5d589d8 | 2016-02-09 11:04:45 +0000 | [diff] [blame^] | 664 | rid_out = masked_rid - rid_base + msi_base; |
David Daney | 8db02d8 | 2015-10-08 15:10:48 -0700 | [diff] [blame] | 665 | dev_dbg(dev, |
| 666 | "msi-map at: %s, using mask %08x, rid-base: %08x, msi-base: %08x, length: %08x, rid: %08x -> %08x\n", |
| 667 | dev_name(parent_dev), map_mask, rid_base, msi_base, |
| 668 | rid_len, rid_in, rid_out); |
| 669 | |
| 670 | return rid_out; |
| 671 | } |
Marc Zyngier | 48ae34f | 2015-09-18 14:07:40 +0100 | [diff] [blame] | 672 | |
Marc Zyngier | a251b26 | 2015-10-01 17:05:45 +0100 | [diff] [blame] | 673 | /** |
| 674 | * of_msi_map_rid - Map a MSI requester ID for a device. |
| 675 | * @dev: device for which the mapping is to be done. |
| 676 | * @msi_np: device node of the expected msi controller. |
| 677 | * @rid_in: unmapped MSI requester ID for the device. |
| 678 | * |
| 679 | * Walk up the device hierarchy looking for devices with a "msi-map" |
| 680 | * property. If found, apply the mapping to @rid_in. |
| 681 | * |
| 682 | * Returns the mapped MSI requester ID. |
| 683 | */ |
| 684 | u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in) |
| 685 | { |
| 686 | return __of_msi_map_rid(dev, &msi_np, rid_in); |
| 687 | } |
| 688 | |
Marc Zyngier | 48ae34f | 2015-09-18 14:07:40 +0100 | [diff] [blame] | 689 | /** |
Marc Zyngier | 82b9b42 | 2015-10-02 14:38:55 +0100 | [diff] [blame] | 690 | * of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain |
| 691 | * @dev: device for which the mapping is to be done. |
| 692 | * @rid: Requester ID for the device. |
| 693 | * |
| 694 | * Walk up the device hierarchy looking for devices with a "msi-map" |
| 695 | * property. |
| 696 | * |
| 697 | * Returns: the MSI domain for this device (or NULL on failure) |
| 698 | */ |
| 699 | struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 rid) |
| 700 | { |
| 701 | struct device_node *np = NULL; |
| 702 | |
| 703 | __of_msi_map_rid(dev, &np, rid); |
Marc Zyngier | 14a0db3 | 2016-01-26 13:52:26 +0000 | [diff] [blame] | 704 | return irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI); |
Marc Zyngier | 82b9b42 | 2015-10-02 14:38:55 +0100 | [diff] [blame] | 705 | } |
| 706 | |
| 707 | /** |
Marc Zyngier | 48ae34f | 2015-09-18 14:07:40 +0100 | [diff] [blame] | 708 | * of_msi_get_domain - Use msi-parent to find the relevant MSI domain |
| 709 | * @dev: device for which the domain is requested |
| 710 | * @np: device node for @dev |
| 711 | * @token: bus type for this domain |
| 712 | * |
| 713 | * Parse the msi-parent property (both the simple and the complex |
| 714 | * versions), and returns the corresponding MSI domain. |
| 715 | * |
| 716 | * Returns: the MSI domain for this device (or NULL on failure). |
| 717 | */ |
| 718 | struct irq_domain *of_msi_get_domain(struct device *dev, |
| 719 | struct device_node *np, |
| 720 | enum irq_domain_bus_token token) |
| 721 | { |
| 722 | struct device_node *msi_np; |
| 723 | struct irq_domain *d; |
| 724 | |
| 725 | /* Check for a single msi-parent property */ |
| 726 | msi_np = of_parse_phandle(np, "msi-parent", 0); |
| 727 | if (msi_np && !of_property_read_bool(msi_np, "#msi-cells")) { |
Marc Zyngier | 14a0db3 | 2016-01-26 13:52:26 +0000 | [diff] [blame] | 728 | d = irq_find_matching_host(msi_np, token); |
Marc Zyngier | 48ae34f | 2015-09-18 14:07:40 +0100 | [diff] [blame] | 729 | if (!d) |
| 730 | of_node_put(msi_np); |
| 731 | return d; |
| 732 | } |
| 733 | |
| 734 | if (token == DOMAIN_BUS_PLATFORM_MSI) { |
| 735 | /* Check for the complex msi-parent version */ |
| 736 | struct of_phandle_args args; |
| 737 | int index = 0; |
| 738 | |
| 739 | while (!of_parse_phandle_with_args(np, "msi-parent", |
| 740 | "#msi-cells", |
| 741 | index, &args)) { |
Marc Zyngier | 14a0db3 | 2016-01-26 13:52:26 +0000 | [diff] [blame] | 742 | d = irq_find_matching_host(args.np, token); |
Marc Zyngier | 48ae34f | 2015-09-18 14:07:40 +0100 | [diff] [blame] | 743 | if (d) |
| 744 | return d; |
| 745 | |
| 746 | of_node_put(args.np); |
| 747 | index++; |
| 748 | } |
| 749 | } |
| 750 | |
| 751 | return NULL; |
| 752 | } |
Marc Zyngier | 61c0824 | 2015-09-18 14:07:40 +0100 | [diff] [blame] | 753 | |
| 754 | /** |
| 755 | * of_msi_configure - Set the msi_domain field of a device |
| 756 | * @dev: device structure to associate with an MSI irq domain |
| 757 | * @np: device node for that device |
| 758 | */ |
| 759 | void of_msi_configure(struct device *dev, struct device_node *np) |
| 760 | { |
| 761 | dev_set_msi_domain(dev, |
| 762 | of_msi_get_domain(dev, np, DOMAIN_BUS_PLATFORM_MSI)); |
| 763 | } |