]>
Commit | Line | Data |
---|---|---|
88ef16d8 TN |
1 | /* |
2 | * Copyright (C) 2016, Semihalf | |
3 | * Author: Tomasz Nowicki <tn@semihalf.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * This file implements early detection/parsing of I/O mapping | |
15 | * reported to OS through firmware via I/O Remapping Table (IORT) | |
16 | * IORT document number: ARM DEN 0049A | |
17 | */ | |
18 | ||
19 | #define pr_fmt(fmt) "ACPI: IORT: " fmt | |
20 | ||
21 | #include <linux/acpi_iort.h> | |
846f0e9e | 22 | #include <linux/iommu.h> |
88ef16d8 | 23 | #include <linux/kernel.h> |
7936df92 | 24 | #include <linux/list.h> |
88ef16d8 | 25 | #include <linux/pci.h> |
846f0e9e | 26 | #include <linux/platform_device.h> |
7936df92 | 27 | #include <linux/slab.h> |
88ef16d8 | 28 | |
4bf2efd2 TN |
29 | struct iort_its_msi_chip { |
30 | struct list_head list; | |
31 | struct fwnode_handle *fw_node; | |
32 | u32 translation_id; | |
33 | }; | |
34 | ||
7936df92 LP |
35 | struct iort_fwnode { |
36 | struct list_head list; | |
37 | struct acpi_iort_node *iort_node; | |
38 | struct fwnode_handle *fwnode; | |
39 | }; | |
40 | static LIST_HEAD(iort_fwnode_list); | |
41 | static DEFINE_SPINLOCK(iort_fwnode_lock); | |
42 | ||
43 | /** | |
44 | * iort_set_fwnode() - Create iort_fwnode and use it to register | |
45 | * iommu data in the iort_fwnode_list | |
46 | * | |
47 | * @node: IORT table node associated with the IOMMU | |
48 | * @fwnode: fwnode associated with the IORT node | |
49 | * | |
50 | * Returns: 0 on success | |
51 | * <0 on failure | |
52 | */ | |
53 | static inline int iort_set_fwnode(struct acpi_iort_node *iort_node, | |
54 | struct fwnode_handle *fwnode) | |
55 | { | |
56 | struct iort_fwnode *np; | |
57 | ||
58 | np = kzalloc(sizeof(struct iort_fwnode), GFP_ATOMIC); | |
59 | ||
60 | if (WARN_ON(!np)) | |
61 | return -ENOMEM; | |
62 | ||
63 | INIT_LIST_HEAD(&np->list); | |
64 | np->iort_node = iort_node; | |
65 | np->fwnode = fwnode; | |
66 | ||
67 | spin_lock(&iort_fwnode_lock); | |
68 | list_add_tail(&np->list, &iort_fwnode_list); | |
69 | spin_unlock(&iort_fwnode_lock); | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | /** | |
75 | * iort_get_fwnode() - Retrieve fwnode associated with an IORT node | |
76 | * | |
77 | * @node: IORT table node to be looked-up | |
78 | * | |
79 | * Returns: fwnode_handle pointer on success, NULL on failure | |
80 | */ | |
81 | static inline | |
82 | struct fwnode_handle *iort_get_fwnode(struct acpi_iort_node *node) | |
83 | { | |
84 | struct iort_fwnode *curr; | |
85 | struct fwnode_handle *fwnode = NULL; | |
86 | ||
87 | spin_lock(&iort_fwnode_lock); | |
88 | list_for_each_entry(curr, &iort_fwnode_list, list) { | |
89 | if (curr->iort_node == node) { | |
90 | fwnode = curr->fwnode; | |
91 | break; | |
92 | } | |
93 | } | |
94 | spin_unlock(&iort_fwnode_lock); | |
95 | ||
96 | return fwnode; | |
97 | } | |
98 | ||
99 | /** | |
100 | * iort_delete_fwnode() - Delete fwnode associated with an IORT node | |
101 | * | |
102 | * @node: IORT table node associated with fwnode to delete | |
103 | */ | |
104 | static inline void iort_delete_fwnode(struct acpi_iort_node *node) | |
105 | { | |
106 | struct iort_fwnode *curr, *tmp; | |
107 | ||
108 | spin_lock(&iort_fwnode_lock); | |
109 | list_for_each_entry_safe(curr, tmp, &iort_fwnode_list, list) { | |
110 | if (curr->iort_node == node) { | |
111 | list_del(&curr->list); | |
112 | kfree(curr); | |
113 | break; | |
114 | } | |
115 | } | |
116 | spin_unlock(&iort_fwnode_lock); | |
117 | } | |
118 | ||
88ef16d8 TN |
119 | typedef acpi_status (*iort_find_node_callback) |
120 | (struct acpi_iort_node *node, void *context); | |
121 | ||
122 | /* Root pointer to the mapped IORT table */ | |
123 | static struct acpi_table_header *iort_table; | |
124 | ||
125 | static LIST_HEAD(iort_msi_chip_list); | |
126 | static DEFINE_SPINLOCK(iort_msi_chip_lock); | |
127 | ||
4bf2efd2 TN |
128 | /** |
129 | * iort_register_domain_token() - register domain token and related ITS ID | |
130 | * to the list from where we can get it back later on. | |
131 | * @trans_id: ITS ID. | |
132 | * @fw_node: Domain token. | |
133 | * | |
134 | * Returns: 0 on success, -ENOMEM if no memory when allocating list element | |
135 | */ | |
136 | int iort_register_domain_token(int trans_id, struct fwnode_handle *fw_node) | |
137 | { | |
138 | struct iort_its_msi_chip *its_msi_chip; | |
139 | ||
140 | its_msi_chip = kzalloc(sizeof(*its_msi_chip), GFP_KERNEL); | |
141 | if (!its_msi_chip) | |
142 | return -ENOMEM; | |
143 | ||
144 | its_msi_chip->fw_node = fw_node; | |
145 | its_msi_chip->translation_id = trans_id; | |
146 | ||
147 | spin_lock(&iort_msi_chip_lock); | |
148 | list_add(&its_msi_chip->list, &iort_msi_chip_list); | |
149 | spin_unlock(&iort_msi_chip_lock); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | /** | |
155 | * iort_deregister_domain_token() - Deregister domain token based on ITS ID | |
156 | * @trans_id: ITS ID. | |
157 | * | |
158 | * Returns: none. | |
159 | */ | |
160 | void iort_deregister_domain_token(int trans_id) | |
161 | { | |
162 | struct iort_its_msi_chip *its_msi_chip, *t; | |
163 | ||
164 | spin_lock(&iort_msi_chip_lock); | |
165 | list_for_each_entry_safe(its_msi_chip, t, &iort_msi_chip_list, list) { | |
166 | if (its_msi_chip->translation_id == trans_id) { | |
167 | list_del(&its_msi_chip->list); | |
168 | kfree(its_msi_chip); | |
169 | break; | |
170 | } | |
171 | } | |
172 | spin_unlock(&iort_msi_chip_lock); | |
173 | } | |
174 | ||
175 | /** | |
176 | * iort_find_domain_token() - Find domain token based on given ITS ID | |
177 | * @trans_id: ITS ID. | |
178 | * | |
179 | * Returns: domain token when find on the list, NULL otherwise | |
180 | */ | |
181 | struct fwnode_handle *iort_find_domain_token(int trans_id) | |
182 | { | |
183 | struct fwnode_handle *fw_node = NULL; | |
184 | struct iort_its_msi_chip *its_msi_chip; | |
185 | ||
186 | spin_lock(&iort_msi_chip_lock); | |
187 | list_for_each_entry(its_msi_chip, &iort_msi_chip_list, list) { | |
188 | if (its_msi_chip->translation_id == trans_id) { | |
189 | fw_node = its_msi_chip->fw_node; | |
190 | break; | |
191 | } | |
192 | } | |
193 | spin_unlock(&iort_msi_chip_lock); | |
194 | ||
195 | return fw_node; | |
196 | } | |
197 | ||
88ef16d8 TN |
198 | static struct acpi_iort_node *iort_scan_node(enum acpi_iort_node_type type, |
199 | iort_find_node_callback callback, | |
200 | void *context) | |
201 | { | |
202 | struct acpi_iort_node *iort_node, *iort_end; | |
203 | struct acpi_table_iort *iort; | |
204 | int i; | |
205 | ||
206 | if (!iort_table) | |
207 | return NULL; | |
208 | ||
209 | /* Get the first IORT node */ | |
210 | iort = (struct acpi_table_iort *)iort_table; | |
211 | iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort, | |
212 | iort->node_offset); | |
213 | iort_end = ACPI_ADD_PTR(struct acpi_iort_node, iort_table, | |
214 | iort_table->length); | |
215 | ||
216 | for (i = 0; i < iort->node_count; i++) { | |
217 | if (WARN_TAINT(iort_node >= iort_end, TAINT_FIRMWARE_WORKAROUND, | |
218 | "IORT node pointer overflows, bad table!\n")) | |
219 | return NULL; | |
220 | ||
221 | if (iort_node->type == type && | |
222 | ACPI_SUCCESS(callback(iort_node, context))) | |
223 | return iort_node; | |
224 | ||
225 | iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort_node, | |
226 | iort_node->length); | |
227 | } | |
228 | ||
229 | return NULL; | |
230 | } | |
231 | ||
bdca0c07 LP |
232 | static acpi_status |
233 | iort_match_type_callback(struct acpi_iort_node *node, void *context) | |
234 | { | |
235 | return AE_OK; | |
236 | } | |
237 | ||
238 | bool iort_node_match(u8 type) | |
239 | { | |
240 | struct acpi_iort_node *node; | |
241 | ||
242 | node = iort_scan_node(type, iort_match_type_callback, NULL); | |
243 | ||
244 | return node != NULL; | |
245 | } | |
246 | ||
88ef16d8 TN |
247 | static acpi_status iort_match_node_callback(struct acpi_iort_node *node, |
248 | void *context) | |
249 | { | |
250 | struct device *dev = context; | |
251 | acpi_status status; | |
252 | ||
253 | if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT) { | |
254 | struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; | |
255 | struct acpi_device *adev = to_acpi_device_node(dev->fwnode); | |
256 | struct acpi_iort_named_component *ncomp; | |
257 | ||
258 | if (!adev) { | |
259 | status = AE_NOT_FOUND; | |
260 | goto out; | |
261 | } | |
262 | ||
263 | status = acpi_get_name(adev->handle, ACPI_FULL_PATHNAME, &buf); | |
264 | if (ACPI_FAILURE(status)) { | |
265 | dev_warn(dev, "Can't get device full path name\n"); | |
266 | goto out; | |
267 | } | |
268 | ||
269 | ncomp = (struct acpi_iort_named_component *)node->node_data; | |
270 | status = !strcmp(ncomp->device_name, buf.pointer) ? | |
271 | AE_OK : AE_NOT_FOUND; | |
272 | acpi_os_free(buf.pointer); | |
273 | } else if (node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) { | |
274 | struct acpi_iort_root_complex *pci_rc; | |
275 | struct pci_bus *bus; | |
276 | ||
277 | bus = to_pci_bus(dev); | |
278 | pci_rc = (struct acpi_iort_root_complex *)node->node_data; | |
279 | ||
280 | /* | |
281 | * It is assumed that PCI segment numbers maps one-to-one | |
282 | * with root complexes. Each segment number can represent only | |
283 | * one root complex. | |
284 | */ | |
285 | status = pci_rc->pci_segment_number == pci_domain_nr(bus) ? | |
286 | AE_OK : AE_NOT_FOUND; | |
287 | } else { | |
288 | status = AE_NOT_FOUND; | |
289 | } | |
290 | out: | |
291 | return status; | |
292 | } | |
293 | ||
294 | static int iort_id_map(struct acpi_iort_id_mapping *map, u8 type, u32 rid_in, | |
295 | u32 *rid_out) | |
296 | { | |
297 | /* Single mapping does not care for input id */ | |
298 | if (map->flags & ACPI_IORT_ID_SINGLE_MAPPING) { | |
299 | if (type == ACPI_IORT_NODE_NAMED_COMPONENT || | |
300 | type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) { | |
301 | *rid_out = map->output_base; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | pr_warn(FW_BUG "[map %p] SINGLE MAPPING flag not allowed for node type %d, skipping ID map\n", | |
306 | map, type); | |
307 | return -ENXIO; | |
308 | } | |
309 | ||
310 | if (rid_in < map->input_base || | |
311 | (rid_in >= map->input_base + map->id_count)) | |
312 | return -ENXIO; | |
313 | ||
314 | *rid_out = map->output_base + (rid_in - map->input_base); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | static struct acpi_iort_node *iort_node_map_rid(struct acpi_iort_node *node, | |
319 | u32 rid_in, u32 *rid_out, | |
320 | u8 type) | |
321 | { | |
322 | u32 rid = rid_in; | |
323 | ||
324 | /* Parse the ID mapping tree to find specified node type */ | |
325 | while (node) { | |
326 | struct acpi_iort_id_mapping *map; | |
327 | int i; | |
328 | ||
329 | if (node->type == type) { | |
330 | if (rid_out) | |
331 | *rid_out = rid; | |
332 | return node; | |
333 | } | |
334 | ||
335 | if (!node->mapping_offset || !node->mapping_count) | |
336 | goto fail_map; | |
337 | ||
338 | map = ACPI_ADD_PTR(struct acpi_iort_id_mapping, node, | |
339 | node->mapping_offset); | |
340 | ||
341 | /* Firmware bug! */ | |
342 | if (!map->output_reference) { | |
343 | pr_err(FW_BUG "[node %p type %d] ID map has NULL parent reference\n", | |
344 | node, node->type); | |
345 | goto fail_map; | |
346 | } | |
347 | ||
348 | /* Do the RID translation */ | |
349 | for (i = 0; i < node->mapping_count; i++, map++) { | |
350 | if (!iort_id_map(map, node->type, rid, &rid)) | |
351 | break; | |
352 | } | |
353 | ||
354 | if (i == node->mapping_count) | |
355 | goto fail_map; | |
356 | ||
357 | node = ACPI_ADD_PTR(struct acpi_iort_node, iort_table, | |
358 | map->output_reference); | |
359 | } | |
360 | ||
361 | fail_map: | |
362 | /* Map input RID to output RID unchanged on mapping failure*/ | |
363 | if (rid_out) | |
364 | *rid_out = rid_in; | |
365 | ||
366 | return NULL; | |
367 | } | |
368 | ||
369 | static struct acpi_iort_node *iort_find_dev_node(struct device *dev) | |
370 | { | |
371 | struct pci_bus *pbus; | |
372 | ||
373 | if (!dev_is_pci(dev)) | |
374 | return iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT, | |
375 | iort_match_node_callback, dev); | |
376 | ||
377 | /* Find a PCI root bus */ | |
378 | pbus = to_pci_dev(dev)->bus; | |
379 | while (!pci_is_root_bus(pbus)) | |
380 | pbus = pbus->parent; | |
381 | ||
382 | return iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, | |
383 | iort_match_node_callback, &pbus->dev); | |
384 | } | |
385 | ||
4bf2efd2 TN |
386 | /** |
387 | * iort_msi_map_rid() - Map a MSI requester ID for a device | |
388 | * @dev: The device for which the mapping is to be done. | |
389 | * @req_id: The device requester ID. | |
390 | * | |
391 | * Returns: mapped MSI RID on success, input requester ID otherwise | |
392 | */ | |
393 | u32 iort_msi_map_rid(struct device *dev, u32 req_id) | |
394 | { | |
395 | struct acpi_iort_node *node; | |
396 | u32 dev_id; | |
397 | ||
398 | node = iort_find_dev_node(dev); | |
399 | if (!node) | |
400 | return req_id; | |
401 | ||
402 | iort_node_map_rid(node, req_id, &dev_id, ACPI_IORT_NODE_ITS_GROUP); | |
403 | return dev_id; | |
404 | } | |
405 | ||
406 | /** | |
407 | * iort_dev_find_its_id() - Find the ITS identifier for a device | |
408 | * @dev: The device. | |
409 | * @idx: Index of the ITS identifier list. | |
410 | * @its_id: ITS identifier. | |
411 | * | |
412 | * Returns: 0 on success, appropriate error value otherwise | |
413 | */ | |
414 | static int iort_dev_find_its_id(struct device *dev, u32 req_id, | |
415 | unsigned int idx, int *its_id) | |
416 | { | |
417 | struct acpi_iort_its_group *its; | |
418 | struct acpi_iort_node *node; | |
419 | ||
420 | node = iort_find_dev_node(dev); | |
421 | if (!node) | |
422 | return -ENXIO; | |
423 | ||
424 | node = iort_node_map_rid(node, req_id, NULL, ACPI_IORT_NODE_ITS_GROUP); | |
425 | if (!node) | |
426 | return -ENXIO; | |
427 | ||
428 | /* Move to ITS specific data */ | |
429 | its = (struct acpi_iort_its_group *)node->node_data; | |
430 | if (idx > its->its_count) { | |
431 | dev_err(dev, "requested ITS ID index [%d] is greater than available [%d]\n", | |
432 | idx, its->its_count); | |
433 | return -ENXIO; | |
434 | } | |
435 | ||
436 | *its_id = its->identifiers[idx]; | |
437 | return 0; | |
438 | } | |
439 | ||
440 | /** | |
441 | * iort_get_device_domain() - Find MSI domain related to a device | |
442 | * @dev: The device. | |
443 | * @req_id: Requester ID for the device. | |
444 | * | |
445 | * Returns: the MSI domain for this device, NULL otherwise | |
446 | */ | |
447 | struct irq_domain *iort_get_device_domain(struct device *dev, u32 req_id) | |
448 | { | |
449 | struct fwnode_handle *handle; | |
450 | int its_id; | |
451 | ||
452 | if (iort_dev_find_its_id(dev, req_id, 0, &its_id)) | |
453 | return NULL; | |
454 | ||
455 | handle = iort_find_domain_token(its_id); | |
456 | if (!handle) | |
457 | return NULL; | |
458 | ||
459 | return irq_find_matching_fwnode(handle, DOMAIN_BUS_PCI_MSI); | |
460 | } | |
461 | ||
e4dadfa8 LP |
462 | static void __init acpi_iort_register_irq(int hwirq, const char *name, |
463 | int trigger, | |
464 | struct resource *res) | |
465 | { | |
466 | int irq = acpi_register_gsi(NULL, hwirq, trigger, | |
467 | ACPI_ACTIVE_HIGH); | |
468 | ||
469 | if (irq <= 0) { | |
470 | pr_err("could not register gsi hwirq %d name [%s]\n", hwirq, | |
471 | name); | |
472 | return; | |
473 | } | |
474 | ||
475 | res->start = irq; | |
476 | res->end = irq; | |
477 | res->flags = IORESOURCE_IRQ; | |
478 | res->name = name; | |
479 | } | |
480 | ||
481 | static int __init arm_smmu_v3_count_resources(struct acpi_iort_node *node) | |
482 | { | |
483 | struct acpi_iort_smmu_v3 *smmu; | |
484 | /* Always present mem resource */ | |
485 | int num_res = 1; | |
486 | ||
487 | /* Retrieve SMMUv3 specific data */ | |
488 | smmu = (struct acpi_iort_smmu_v3 *)node->node_data; | |
489 | ||
490 | if (smmu->event_gsiv) | |
491 | num_res++; | |
492 | ||
493 | if (smmu->pri_gsiv) | |
494 | num_res++; | |
495 | ||
496 | if (smmu->gerr_gsiv) | |
497 | num_res++; | |
498 | ||
499 | if (smmu->sync_gsiv) | |
500 | num_res++; | |
501 | ||
502 | return num_res; | |
503 | } | |
504 | ||
505 | static void __init arm_smmu_v3_init_resources(struct resource *res, | |
506 | struct acpi_iort_node *node) | |
507 | { | |
508 | struct acpi_iort_smmu_v3 *smmu; | |
509 | int num_res = 0; | |
510 | ||
511 | /* Retrieve SMMUv3 specific data */ | |
512 | smmu = (struct acpi_iort_smmu_v3 *)node->node_data; | |
513 | ||
514 | res[num_res].start = smmu->base_address; | |
515 | res[num_res].end = smmu->base_address + SZ_128K - 1; | |
516 | res[num_res].flags = IORESOURCE_MEM; | |
517 | ||
518 | num_res++; | |
519 | ||
520 | if (smmu->event_gsiv) | |
521 | acpi_iort_register_irq(smmu->event_gsiv, "eventq", | |
522 | ACPI_EDGE_SENSITIVE, | |
523 | &res[num_res++]); | |
524 | ||
525 | if (smmu->pri_gsiv) | |
526 | acpi_iort_register_irq(smmu->pri_gsiv, "priq", | |
527 | ACPI_EDGE_SENSITIVE, | |
528 | &res[num_res++]); | |
529 | ||
530 | if (smmu->gerr_gsiv) | |
531 | acpi_iort_register_irq(smmu->gerr_gsiv, "gerror", | |
532 | ACPI_EDGE_SENSITIVE, | |
533 | &res[num_res++]); | |
534 | ||
535 | if (smmu->sync_gsiv) | |
536 | acpi_iort_register_irq(smmu->sync_gsiv, "cmdq-sync", | |
537 | ACPI_EDGE_SENSITIVE, | |
538 | &res[num_res++]); | |
539 | } | |
540 | ||
541 | static bool __init arm_smmu_v3_is_coherent(struct acpi_iort_node *node) | |
542 | { | |
543 | struct acpi_iort_smmu_v3 *smmu; | |
544 | ||
545 | /* Retrieve SMMUv3 specific data */ | |
546 | smmu = (struct acpi_iort_smmu_v3 *)node->node_data; | |
547 | ||
548 | return smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE; | |
549 | } | |
550 | ||
d6fcd3b1 LP |
551 | static int __init arm_smmu_count_resources(struct acpi_iort_node *node) |
552 | { | |
553 | struct acpi_iort_smmu *smmu; | |
554 | ||
555 | /* Retrieve SMMU specific data */ | |
556 | smmu = (struct acpi_iort_smmu *)node->node_data; | |
557 | ||
558 | /* | |
559 | * Only consider the global fault interrupt and ignore the | |
560 | * configuration access interrupt. | |
561 | * | |
562 | * MMIO address and global fault interrupt resources are always | |
563 | * present so add them to the context interrupt count as a static | |
564 | * value. | |
565 | */ | |
566 | return smmu->context_interrupt_count + 2; | |
567 | } | |
568 | ||
569 | static void __init arm_smmu_init_resources(struct resource *res, | |
570 | struct acpi_iort_node *node) | |
571 | { | |
572 | struct acpi_iort_smmu *smmu; | |
573 | int i, hw_irq, trigger, num_res = 0; | |
574 | u64 *ctx_irq, *glb_irq; | |
575 | ||
576 | /* Retrieve SMMU specific data */ | |
577 | smmu = (struct acpi_iort_smmu *)node->node_data; | |
578 | ||
579 | res[num_res].start = smmu->base_address; | |
580 | res[num_res].end = smmu->base_address + smmu->span - 1; | |
581 | res[num_res].flags = IORESOURCE_MEM; | |
582 | num_res++; | |
583 | ||
584 | glb_irq = ACPI_ADD_PTR(u64, node, smmu->global_interrupt_offset); | |
585 | /* Global IRQs */ | |
586 | hw_irq = IORT_IRQ_MASK(glb_irq[0]); | |
587 | trigger = IORT_IRQ_TRIGGER_MASK(glb_irq[0]); | |
588 | ||
589 | acpi_iort_register_irq(hw_irq, "arm-smmu-global", trigger, | |
590 | &res[num_res++]); | |
591 | ||
592 | /* Context IRQs */ | |
593 | ctx_irq = ACPI_ADD_PTR(u64, node, smmu->context_interrupt_offset); | |
594 | for (i = 0; i < smmu->context_interrupt_count; i++) { | |
595 | hw_irq = IORT_IRQ_MASK(ctx_irq[i]); | |
596 | trigger = IORT_IRQ_TRIGGER_MASK(ctx_irq[i]); | |
597 | ||
598 | acpi_iort_register_irq(hw_irq, "arm-smmu-context", trigger, | |
599 | &res[num_res++]); | |
600 | } | |
601 | } | |
602 | ||
603 | static bool __init arm_smmu_is_coherent(struct acpi_iort_node *node) | |
604 | { | |
605 | struct acpi_iort_smmu *smmu; | |
606 | ||
607 | /* Retrieve SMMU specific data */ | |
608 | smmu = (struct acpi_iort_smmu *)node->node_data; | |
609 | ||
610 | return smmu->flags & ACPI_IORT_SMMU_COHERENT_WALK; | |
611 | } | |
612 | ||
846f0e9e LP |
613 | struct iort_iommu_config { |
614 | const char *name; | |
615 | int (*iommu_init)(struct acpi_iort_node *node); | |
616 | bool (*iommu_is_coherent)(struct acpi_iort_node *node); | |
617 | int (*iommu_count_resources)(struct acpi_iort_node *node); | |
618 | void (*iommu_init_resources)(struct resource *res, | |
619 | struct acpi_iort_node *node); | |
620 | }; | |
621 | ||
e4dadfa8 LP |
622 | static const struct iort_iommu_config iort_arm_smmu_v3_cfg __initconst = { |
623 | .name = "arm-smmu-v3", | |
624 | .iommu_is_coherent = arm_smmu_v3_is_coherent, | |
625 | .iommu_count_resources = arm_smmu_v3_count_resources, | |
626 | .iommu_init_resources = arm_smmu_v3_init_resources | |
627 | }; | |
628 | ||
d6fcd3b1 LP |
629 | static const struct iort_iommu_config iort_arm_smmu_cfg __initconst = { |
630 | .name = "arm-smmu", | |
631 | .iommu_is_coherent = arm_smmu_is_coherent, | |
632 | .iommu_count_resources = arm_smmu_count_resources, | |
633 | .iommu_init_resources = arm_smmu_init_resources | |
634 | }; | |
635 | ||
846f0e9e LP |
636 | static __init |
637 | const struct iort_iommu_config *iort_get_iommu_cfg(struct acpi_iort_node *node) | |
638 | { | |
e4dadfa8 LP |
639 | switch (node->type) { |
640 | case ACPI_IORT_NODE_SMMU_V3: | |
641 | return &iort_arm_smmu_v3_cfg; | |
d6fcd3b1 LP |
642 | case ACPI_IORT_NODE_SMMU: |
643 | return &iort_arm_smmu_cfg; | |
e4dadfa8 LP |
644 | default: |
645 | return NULL; | |
646 | } | |
846f0e9e LP |
647 | } |
648 | ||
649 | /** | |
650 | * iort_add_smmu_platform_device() - Allocate a platform device for SMMU | |
651 | * @node: Pointer to SMMU ACPI IORT node | |
652 | * | |
653 | * Returns: 0 on success, <0 failure | |
654 | */ | |
655 | static int __init iort_add_smmu_platform_device(struct acpi_iort_node *node) | |
656 | { | |
657 | struct fwnode_handle *fwnode; | |
658 | struct platform_device *pdev; | |
659 | struct resource *r; | |
660 | enum dev_dma_attr attr; | |
661 | int ret, count; | |
662 | const struct iort_iommu_config *ops = iort_get_iommu_cfg(node); | |
663 | ||
664 | if (!ops) | |
665 | return -ENODEV; | |
666 | ||
667 | pdev = platform_device_alloc(ops->name, PLATFORM_DEVID_AUTO); | |
668 | if (!pdev) | |
669 | return PTR_ERR(pdev); | |
670 | ||
671 | count = ops->iommu_count_resources(node); | |
672 | ||
673 | r = kcalloc(count, sizeof(*r), GFP_KERNEL); | |
674 | if (!r) { | |
675 | ret = -ENOMEM; | |
676 | goto dev_put; | |
677 | } | |
678 | ||
679 | ops->iommu_init_resources(r, node); | |
680 | ||
681 | ret = platform_device_add_resources(pdev, r, count); | |
682 | /* | |
683 | * Resources are duplicated in platform_device_add_resources, | |
684 | * free their allocated memory | |
685 | */ | |
686 | kfree(r); | |
687 | ||
688 | if (ret) | |
689 | goto dev_put; | |
690 | ||
691 | /* | |
692 | * Add a copy of IORT node pointer to platform_data to | |
693 | * be used to retrieve IORT data information. | |
694 | */ | |
695 | ret = platform_device_add_data(pdev, &node, sizeof(node)); | |
696 | if (ret) | |
697 | goto dev_put; | |
698 | ||
699 | /* | |
700 | * We expect the dma masks to be equivalent for | |
701 | * all SMMUs set-ups | |
702 | */ | |
703 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; | |
704 | ||
705 | fwnode = iort_get_fwnode(node); | |
706 | ||
707 | if (!fwnode) { | |
708 | ret = -ENODEV; | |
709 | goto dev_put; | |
710 | } | |
711 | ||
712 | pdev->dev.fwnode = fwnode; | |
713 | ||
714 | attr = ops->iommu_is_coherent(node) ? | |
715 | DEV_DMA_COHERENT : DEV_DMA_NON_COHERENT; | |
716 | ||
717 | /* Configure DMA for the page table walker */ | |
718 | acpi_dma_configure(&pdev->dev, attr); | |
719 | ||
720 | ret = platform_device_add(pdev); | |
721 | if (ret) | |
722 | goto dma_deconfigure; | |
723 | ||
724 | return 0; | |
725 | ||
726 | dma_deconfigure: | |
727 | acpi_dma_deconfigure(&pdev->dev); | |
728 | dev_put: | |
729 | platform_device_put(pdev); | |
730 | ||
731 | return ret; | |
732 | } | |
733 | ||
734 | static void __init iort_init_platform_devices(void) | |
735 | { | |
736 | struct acpi_iort_node *iort_node, *iort_end; | |
737 | struct acpi_table_iort *iort; | |
738 | struct fwnode_handle *fwnode; | |
739 | int i, ret; | |
740 | ||
741 | /* | |
742 | * iort_table and iort both point to the start of IORT table, but | |
743 | * have different struct types | |
744 | */ | |
745 | iort = (struct acpi_table_iort *)iort_table; | |
746 | ||
747 | /* Get the first IORT node */ | |
748 | iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort, | |
749 | iort->node_offset); | |
750 | iort_end = ACPI_ADD_PTR(struct acpi_iort_node, iort, | |
751 | iort_table->length); | |
752 | ||
753 | for (i = 0; i < iort->node_count; i++) { | |
754 | if (iort_node >= iort_end) { | |
755 | pr_err("iort node pointer overflows, bad table\n"); | |
756 | return; | |
757 | } | |
758 | ||
759 | if ((iort_node->type == ACPI_IORT_NODE_SMMU) || | |
760 | (iort_node->type == ACPI_IORT_NODE_SMMU_V3)) { | |
761 | ||
762 | fwnode = acpi_alloc_fwnode_static(); | |
763 | if (!fwnode) | |
764 | return; | |
765 | ||
766 | iort_set_fwnode(iort_node, fwnode); | |
767 | ||
768 | ret = iort_add_smmu_platform_device(iort_node); | |
769 | if (ret) { | |
770 | iort_delete_fwnode(iort_node); | |
771 | acpi_free_fwnode_static(fwnode); | |
772 | return; | |
773 | } | |
774 | } | |
775 | ||
776 | iort_node = ACPI_ADD_PTR(struct acpi_iort_node, iort_node, | |
777 | iort_node->length); | |
778 | } | |
779 | } | |
780 | ||
88ef16d8 TN |
781 | void __init acpi_iort_init(void) |
782 | { | |
783 | acpi_status status; | |
784 | ||
785 | status = acpi_get_table(ACPI_SIG_IORT, 0, &iort_table); | |
34ceea27 LP |
786 | if (ACPI_FAILURE(status)) { |
787 | if (status != AE_NOT_FOUND) { | |
788 | const char *msg = acpi_format_exception(status); | |
789 | ||
790 | pr_err("Failed to get table, %s\n", msg); | |
791 | } | |
792 | ||
793 | return; | |
88ef16d8 | 794 | } |
34ceea27 | 795 | |
846f0e9e LP |
796 | iort_init_platform_devices(); |
797 | ||
34ceea27 | 798 | acpi_probe_device_table(iort); |
88ef16d8 | 799 | } |