Commit | Line | Data |
---|---|---|
b94d5230 DW |
1 | /* |
2 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | */ | |
13 | #include <linux/list_sort.h> | |
14 | #include <linux/libnvdimm.h> | |
15 | #include <linux/module.h> | |
047fc8a1 | 16 | #include <linux/mutex.h> |
62232e45 | 17 | #include <linux/ndctl.h> |
b94d5230 DW |
18 | #include <linux/list.h> |
19 | #include <linux/acpi.h> | |
eaf96153 | 20 | #include <linux/sort.h> |
047fc8a1 | 21 | #include <linux/io.h> |
b94d5230 DW |
22 | #include "nfit.h" |
23 | ||
047fc8a1 RZ |
24 | /* |
25 | * For readq() and writeq() on 32-bit builds, the hi-lo, lo-hi order is | |
26 | * irrelevant. | |
27 | */ | |
28 | #include <asm-generic/io-64-nonatomic-hi-lo.h> | |
29 | ||
4d88a97a DW |
30 | static bool force_enable_dimms; |
31 | module_param(force_enable_dimms, bool, S_IRUGO|S_IWUSR); | |
32 | MODULE_PARM_DESC(force_enable_dimms, "Ignore _STA (ACPI DIMM device) status"); | |
33 | ||
b94d5230 DW |
34 | static u8 nfit_uuid[NFIT_UUID_MAX][16]; |
35 | ||
6bc75619 | 36 | const u8 *to_nfit_uuid(enum nfit_uuids id) |
b94d5230 DW |
37 | { |
38 | return nfit_uuid[id]; | |
39 | } | |
6bc75619 | 40 | EXPORT_SYMBOL(to_nfit_uuid); |
b94d5230 | 41 | |
62232e45 DW |
42 | static struct acpi_nfit_desc *to_acpi_nfit_desc( |
43 | struct nvdimm_bus_descriptor *nd_desc) | |
44 | { | |
45 | return container_of(nd_desc, struct acpi_nfit_desc, nd_desc); | |
46 | } | |
47 | ||
48 | static struct acpi_device *to_acpi_dev(struct acpi_nfit_desc *acpi_desc) | |
49 | { | |
50 | struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc; | |
51 | ||
52 | /* | |
53 | * If provider == 'ACPI.NFIT' we can assume 'dev' is a struct | |
54 | * acpi_device. | |
55 | */ | |
56 | if (!nd_desc->provider_name | |
57 | || strcmp(nd_desc->provider_name, "ACPI.NFIT") != 0) | |
58 | return NULL; | |
59 | ||
60 | return to_acpi_device(acpi_desc->dev); | |
61 | } | |
62 | ||
b94d5230 DW |
63 | static int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, |
64 | struct nvdimm *nvdimm, unsigned int cmd, void *buf, | |
65 | unsigned int buf_len) | |
66 | { | |
62232e45 DW |
67 | struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc); |
68 | const struct nd_cmd_desc *desc = NULL; | |
69 | union acpi_object in_obj, in_buf, *out_obj; | |
70 | struct device *dev = acpi_desc->dev; | |
71 | const char *cmd_name, *dimm_name; | |
72 | unsigned long dsm_mask; | |
73 | acpi_handle handle; | |
74 | const u8 *uuid; | |
75 | u32 offset; | |
76 | int rc, i; | |
77 | ||
78 | if (nvdimm) { | |
79 | struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); | |
80 | struct acpi_device *adev = nfit_mem->adev; | |
81 | ||
82 | if (!adev) | |
83 | return -ENOTTY; | |
047fc8a1 | 84 | dimm_name = nvdimm_name(nvdimm); |
62232e45 DW |
85 | cmd_name = nvdimm_cmd_name(cmd); |
86 | dsm_mask = nfit_mem->dsm_mask; | |
87 | desc = nd_cmd_dimm_desc(cmd); | |
88 | uuid = to_nfit_uuid(NFIT_DEV_DIMM); | |
89 | handle = adev->handle; | |
90 | } else { | |
91 | struct acpi_device *adev = to_acpi_dev(acpi_desc); | |
92 | ||
93 | cmd_name = nvdimm_bus_cmd_name(cmd); | |
94 | dsm_mask = nd_desc->dsm_mask; | |
95 | desc = nd_cmd_bus_desc(cmd); | |
96 | uuid = to_nfit_uuid(NFIT_DEV_BUS); | |
97 | handle = adev->handle; | |
98 | dimm_name = "bus"; | |
99 | } | |
100 | ||
101 | if (!desc || (cmd && (desc->out_num + desc->in_num == 0))) | |
102 | return -ENOTTY; | |
103 | ||
104 | if (!test_bit(cmd, &dsm_mask)) | |
105 | return -ENOTTY; | |
106 | ||
107 | in_obj.type = ACPI_TYPE_PACKAGE; | |
108 | in_obj.package.count = 1; | |
109 | in_obj.package.elements = &in_buf; | |
110 | in_buf.type = ACPI_TYPE_BUFFER; | |
111 | in_buf.buffer.pointer = buf; | |
112 | in_buf.buffer.length = 0; | |
113 | ||
114 | /* libnvdimm has already validated the input envelope */ | |
115 | for (i = 0; i < desc->in_num; i++) | |
116 | in_buf.buffer.length += nd_cmd_in_size(nvdimm, cmd, desc, | |
117 | i, buf); | |
118 | ||
119 | if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG)) { | |
120 | dev_dbg(dev, "%s:%s cmd: %s input length: %d\n", __func__, | |
121 | dimm_name, cmd_name, in_buf.buffer.length); | |
122 | print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, | |
123 | 4, in_buf.buffer.pointer, min_t(u32, 128, | |
124 | in_buf.buffer.length), true); | |
125 | } | |
126 | ||
127 | out_obj = acpi_evaluate_dsm(handle, uuid, 1, cmd, &in_obj); | |
128 | if (!out_obj) { | |
129 | dev_dbg(dev, "%s:%s _DSM failed cmd: %s\n", __func__, dimm_name, | |
130 | cmd_name); | |
131 | return -EINVAL; | |
132 | } | |
133 | ||
134 | if (out_obj->package.type != ACPI_TYPE_BUFFER) { | |
135 | dev_dbg(dev, "%s:%s unexpected output object type cmd: %s type: %d\n", | |
136 | __func__, dimm_name, cmd_name, out_obj->type); | |
137 | rc = -EINVAL; | |
138 | goto out; | |
139 | } | |
140 | ||
141 | if (IS_ENABLED(CONFIG_ACPI_NFIT_DEBUG)) { | |
142 | dev_dbg(dev, "%s:%s cmd: %s output length: %d\n", __func__, | |
143 | dimm_name, cmd_name, out_obj->buffer.length); | |
144 | print_hex_dump_debug(cmd_name, DUMP_PREFIX_OFFSET, 4, | |
145 | 4, out_obj->buffer.pointer, min_t(u32, 128, | |
146 | out_obj->buffer.length), true); | |
147 | } | |
148 | ||
149 | for (i = 0, offset = 0; i < desc->out_num; i++) { | |
150 | u32 out_size = nd_cmd_out_size(nvdimm, cmd, desc, i, buf, | |
151 | (u32 *) out_obj->buffer.pointer); | |
152 | ||
153 | if (offset + out_size > out_obj->buffer.length) { | |
154 | dev_dbg(dev, "%s:%s output object underflow cmd: %s field: %d\n", | |
155 | __func__, dimm_name, cmd_name, i); | |
156 | break; | |
157 | } | |
158 | ||
159 | if (in_buf.buffer.length + offset + out_size > buf_len) { | |
160 | dev_dbg(dev, "%s:%s output overrun cmd: %s field: %d\n", | |
161 | __func__, dimm_name, cmd_name, i); | |
162 | rc = -ENXIO; | |
163 | goto out; | |
164 | } | |
165 | memcpy(buf + in_buf.buffer.length + offset, | |
166 | out_obj->buffer.pointer + offset, out_size); | |
167 | offset += out_size; | |
168 | } | |
169 | if (offset + in_buf.buffer.length < buf_len) { | |
170 | if (i >= 1) { | |
171 | /* | |
172 | * status valid, return the number of bytes left | |
173 | * unfilled in the output buffer | |
174 | */ | |
175 | rc = buf_len - offset - in_buf.buffer.length; | |
176 | } else { | |
177 | dev_err(dev, "%s:%s underrun cmd: %s buf_len: %d out_len: %d\n", | |
178 | __func__, dimm_name, cmd_name, buf_len, | |
179 | offset); | |
180 | rc = -ENXIO; | |
181 | } | |
182 | } else | |
183 | rc = 0; | |
184 | ||
185 | out: | |
186 | ACPI_FREE(out_obj); | |
187 | ||
188 | return rc; | |
b94d5230 DW |
189 | } |
190 | ||
191 | static const char *spa_type_name(u16 type) | |
192 | { | |
193 | static const char *to_name[] = { | |
194 | [NFIT_SPA_VOLATILE] = "volatile", | |
195 | [NFIT_SPA_PM] = "pmem", | |
196 | [NFIT_SPA_DCR] = "dimm-control-region", | |
197 | [NFIT_SPA_BDW] = "block-data-window", | |
198 | [NFIT_SPA_VDISK] = "volatile-disk", | |
199 | [NFIT_SPA_VCD] = "volatile-cd", | |
200 | [NFIT_SPA_PDISK] = "persistent-disk", | |
201 | [NFIT_SPA_PCD] = "persistent-cd", | |
202 | ||
203 | }; | |
204 | ||
205 | if (type > NFIT_SPA_PCD) | |
206 | return "unknown"; | |
207 | ||
208 | return to_name[type]; | |
209 | } | |
210 | ||
211 | static int nfit_spa_type(struct acpi_nfit_system_address *spa) | |
212 | { | |
213 | int i; | |
214 | ||
215 | for (i = 0; i < NFIT_UUID_MAX; i++) | |
216 | if (memcmp(to_nfit_uuid(i), spa->range_guid, 16) == 0) | |
217 | return i; | |
218 | return -1; | |
219 | } | |
220 | ||
221 | static bool add_spa(struct acpi_nfit_desc *acpi_desc, | |
222 | struct acpi_nfit_system_address *spa) | |
223 | { | |
224 | struct device *dev = acpi_desc->dev; | |
225 | struct nfit_spa *nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa), | |
226 | GFP_KERNEL); | |
227 | ||
228 | if (!nfit_spa) | |
229 | return false; | |
230 | INIT_LIST_HEAD(&nfit_spa->list); | |
231 | nfit_spa->spa = spa; | |
232 | list_add_tail(&nfit_spa->list, &acpi_desc->spas); | |
233 | dev_dbg(dev, "%s: spa index: %d type: %s\n", __func__, | |
234 | spa->range_index, | |
235 | spa_type_name(nfit_spa_type(spa))); | |
236 | return true; | |
237 | } | |
238 | ||
239 | static bool add_memdev(struct acpi_nfit_desc *acpi_desc, | |
240 | struct acpi_nfit_memory_map *memdev) | |
241 | { | |
242 | struct device *dev = acpi_desc->dev; | |
243 | struct nfit_memdev *nfit_memdev = devm_kzalloc(dev, | |
244 | sizeof(*nfit_memdev), GFP_KERNEL); | |
245 | ||
246 | if (!nfit_memdev) | |
247 | return false; | |
248 | INIT_LIST_HEAD(&nfit_memdev->list); | |
249 | nfit_memdev->memdev = memdev; | |
250 | list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs); | |
251 | dev_dbg(dev, "%s: memdev handle: %#x spa: %d dcr: %d\n", | |
252 | __func__, memdev->device_handle, memdev->range_index, | |
253 | memdev->region_index); | |
254 | return true; | |
255 | } | |
256 | ||
257 | static bool add_dcr(struct acpi_nfit_desc *acpi_desc, | |
258 | struct acpi_nfit_control_region *dcr) | |
259 | { | |
260 | struct device *dev = acpi_desc->dev; | |
261 | struct nfit_dcr *nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr), | |
262 | GFP_KERNEL); | |
263 | ||
264 | if (!nfit_dcr) | |
265 | return false; | |
266 | INIT_LIST_HEAD(&nfit_dcr->list); | |
267 | nfit_dcr->dcr = dcr; | |
268 | list_add_tail(&nfit_dcr->list, &acpi_desc->dcrs); | |
269 | dev_dbg(dev, "%s: dcr index: %d windows: %d\n", __func__, | |
270 | dcr->region_index, dcr->windows); | |
271 | return true; | |
272 | } | |
273 | ||
274 | static bool add_bdw(struct acpi_nfit_desc *acpi_desc, | |
275 | struct acpi_nfit_data_region *bdw) | |
276 | { | |
277 | struct device *dev = acpi_desc->dev; | |
278 | struct nfit_bdw *nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw), | |
279 | GFP_KERNEL); | |
280 | ||
281 | if (!nfit_bdw) | |
282 | return false; | |
283 | INIT_LIST_HEAD(&nfit_bdw->list); | |
284 | nfit_bdw->bdw = bdw; | |
285 | list_add_tail(&nfit_bdw->list, &acpi_desc->bdws); | |
286 | dev_dbg(dev, "%s: bdw dcr: %d windows: %d\n", __func__, | |
287 | bdw->region_index, bdw->windows); | |
288 | return true; | |
289 | } | |
290 | ||
047fc8a1 RZ |
291 | static bool add_idt(struct acpi_nfit_desc *acpi_desc, |
292 | struct acpi_nfit_interleave *idt) | |
293 | { | |
294 | struct device *dev = acpi_desc->dev; | |
295 | struct nfit_idt *nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt), | |
296 | GFP_KERNEL); | |
297 | ||
298 | if (!nfit_idt) | |
299 | return false; | |
300 | INIT_LIST_HEAD(&nfit_idt->list); | |
301 | nfit_idt->idt = idt; | |
302 | list_add_tail(&nfit_idt->list, &acpi_desc->idts); | |
303 | dev_dbg(dev, "%s: idt index: %d num_lines: %d\n", __func__, | |
304 | idt->interleave_index, idt->line_count); | |
305 | return true; | |
306 | } | |
307 | ||
b94d5230 DW |
308 | static void *add_table(struct acpi_nfit_desc *acpi_desc, void *table, |
309 | const void *end) | |
310 | { | |
311 | struct device *dev = acpi_desc->dev; | |
312 | struct acpi_nfit_header *hdr; | |
313 | void *err = ERR_PTR(-ENOMEM); | |
314 | ||
315 | if (table >= end) | |
316 | return NULL; | |
317 | ||
318 | hdr = table; | |
319 | switch (hdr->type) { | |
320 | case ACPI_NFIT_TYPE_SYSTEM_ADDRESS: | |
321 | if (!add_spa(acpi_desc, table)) | |
322 | return err; | |
323 | break; | |
324 | case ACPI_NFIT_TYPE_MEMORY_MAP: | |
325 | if (!add_memdev(acpi_desc, table)) | |
326 | return err; | |
327 | break; | |
328 | case ACPI_NFIT_TYPE_CONTROL_REGION: | |
329 | if (!add_dcr(acpi_desc, table)) | |
330 | return err; | |
331 | break; | |
332 | case ACPI_NFIT_TYPE_DATA_REGION: | |
333 | if (!add_bdw(acpi_desc, table)) | |
334 | return err; | |
335 | break; | |
b94d5230 | 336 | case ACPI_NFIT_TYPE_INTERLEAVE: |
047fc8a1 RZ |
337 | if (!add_idt(acpi_desc, table)) |
338 | return err; | |
b94d5230 DW |
339 | break; |
340 | case ACPI_NFIT_TYPE_FLUSH_ADDRESS: | |
341 | dev_dbg(dev, "%s: flush\n", __func__); | |
342 | break; | |
343 | case ACPI_NFIT_TYPE_SMBIOS: | |
344 | dev_dbg(dev, "%s: smbios\n", __func__); | |
345 | break; | |
346 | default: | |
347 | dev_err(dev, "unknown table '%d' parsing nfit\n", hdr->type); | |
348 | break; | |
349 | } | |
350 | ||
351 | return table + hdr->length; | |
352 | } | |
353 | ||
354 | static void nfit_mem_find_spa_bdw(struct acpi_nfit_desc *acpi_desc, | |
355 | struct nfit_mem *nfit_mem) | |
356 | { | |
357 | u32 device_handle = __to_nfit_memdev(nfit_mem)->device_handle; | |
358 | u16 dcr = nfit_mem->dcr->region_index; | |
359 | struct nfit_spa *nfit_spa; | |
360 | ||
361 | list_for_each_entry(nfit_spa, &acpi_desc->spas, list) { | |
362 | u16 range_index = nfit_spa->spa->range_index; | |
363 | int type = nfit_spa_type(nfit_spa->spa); | |
364 | struct nfit_memdev *nfit_memdev; | |
365 | ||
366 | if (type != NFIT_SPA_BDW) | |
367 | continue; | |
368 | ||
369 | list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) { | |
370 | if (nfit_memdev->memdev->range_index != range_index) | |
371 | continue; | |
372 | if (nfit_memdev->memdev->device_handle != device_handle) | |
373 | continue; | |
374 | if (nfit_memdev->memdev->region_index != dcr) | |
375 | continue; | |
376 | ||
377 | nfit_mem->spa_bdw = nfit_spa->spa; | |
378 | return; | |
379 | } | |
380 | } | |
381 | ||
382 | dev_dbg(acpi_desc->dev, "SPA-BDW not found for SPA-DCR %d\n", | |
383 | nfit_mem->spa_dcr->range_index); | |
384 | nfit_mem->bdw = NULL; | |
385 | } | |
386 | ||
387 | static int nfit_mem_add(struct acpi_nfit_desc *acpi_desc, | |
388 | struct nfit_mem *nfit_mem, struct acpi_nfit_system_address *spa) | |
389 | { | |
390 | u16 dcr = __to_nfit_memdev(nfit_mem)->region_index; | |
047fc8a1 | 391 | struct nfit_memdev *nfit_memdev; |
b94d5230 DW |
392 | struct nfit_dcr *nfit_dcr; |
393 | struct nfit_bdw *nfit_bdw; | |
047fc8a1 RZ |
394 | struct nfit_idt *nfit_idt; |
395 | u16 idt_idx, range_index; | |
b94d5230 DW |
396 | |
397 | list_for_each_entry(nfit_dcr, &acpi_desc->dcrs, list) { | |
398 | if (nfit_dcr->dcr->region_index != dcr) | |
399 | continue; | |
400 | nfit_mem->dcr = nfit_dcr->dcr; | |
401 | break; | |
402 | } | |
403 | ||
404 | if (!nfit_mem->dcr) { | |
405 | dev_dbg(acpi_desc->dev, "SPA %d missing:%s%s\n", | |
406 | spa->range_index, __to_nfit_memdev(nfit_mem) | |
407 | ? "" : " MEMDEV", nfit_mem->dcr ? "" : " DCR"); | |
408 | return -ENODEV; | |
409 | } | |
410 | ||
411 | /* | |
412 | * We've found enough to create an nvdimm, optionally | |
413 | * find an associated BDW | |
414 | */ | |
415 | list_add(&nfit_mem->list, &acpi_desc->dimms); | |
416 | ||
417 | list_for_each_entry(nfit_bdw, &acpi_desc->bdws, list) { | |
418 | if (nfit_bdw->bdw->region_index != dcr) | |
419 | continue; | |
420 | nfit_mem->bdw = nfit_bdw->bdw; | |
421 | break; | |
422 | } | |
423 | ||
424 | if (!nfit_mem->bdw) | |
425 | return 0; | |
426 | ||
427 | nfit_mem_find_spa_bdw(acpi_desc, nfit_mem); | |
047fc8a1 RZ |
428 | |
429 | if (!nfit_mem->spa_bdw) | |
430 | return 0; | |
431 | ||
432 | range_index = nfit_mem->spa_bdw->range_index; | |
433 | list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) { | |
434 | if (nfit_memdev->memdev->range_index != range_index || | |
435 | nfit_memdev->memdev->region_index != dcr) | |
436 | continue; | |
437 | nfit_mem->memdev_bdw = nfit_memdev->memdev; | |
438 | idt_idx = nfit_memdev->memdev->interleave_index; | |
439 | list_for_each_entry(nfit_idt, &acpi_desc->idts, list) { | |
440 | if (nfit_idt->idt->interleave_index != idt_idx) | |
441 | continue; | |
442 | nfit_mem->idt_bdw = nfit_idt->idt; | |
443 | break; | |
444 | } | |
445 | break; | |
446 | } | |
447 | ||
b94d5230 DW |
448 | return 0; |
449 | } | |
450 | ||
451 | static int nfit_mem_dcr_init(struct acpi_nfit_desc *acpi_desc, | |
452 | struct acpi_nfit_system_address *spa) | |
453 | { | |
454 | struct nfit_mem *nfit_mem, *found; | |
455 | struct nfit_memdev *nfit_memdev; | |
456 | int type = nfit_spa_type(spa); | |
457 | u16 dcr; | |
458 | ||
459 | switch (type) { | |
460 | case NFIT_SPA_DCR: | |
461 | case NFIT_SPA_PM: | |
462 | break; | |
463 | default: | |
464 | return 0; | |
465 | } | |
466 | ||
467 | list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) { | |
468 | int rc; | |
469 | ||
470 | if (nfit_memdev->memdev->range_index != spa->range_index) | |
471 | continue; | |
472 | found = NULL; | |
473 | dcr = nfit_memdev->memdev->region_index; | |
474 | list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) | |
475 | if (__to_nfit_memdev(nfit_mem)->region_index == dcr) { | |
476 | found = nfit_mem; | |
477 | break; | |
478 | } | |
479 | ||
480 | if (found) | |
481 | nfit_mem = found; | |
482 | else { | |
483 | nfit_mem = devm_kzalloc(acpi_desc->dev, | |
484 | sizeof(*nfit_mem), GFP_KERNEL); | |
485 | if (!nfit_mem) | |
486 | return -ENOMEM; | |
487 | INIT_LIST_HEAD(&nfit_mem->list); | |
488 | } | |
489 | ||
490 | if (type == NFIT_SPA_DCR) { | |
047fc8a1 RZ |
491 | struct nfit_idt *nfit_idt; |
492 | u16 idt_idx; | |
493 | ||
b94d5230 DW |
494 | /* multiple dimms may share a SPA when interleaved */ |
495 | nfit_mem->spa_dcr = spa; | |
496 | nfit_mem->memdev_dcr = nfit_memdev->memdev; | |
047fc8a1 RZ |
497 | idt_idx = nfit_memdev->memdev->interleave_index; |
498 | list_for_each_entry(nfit_idt, &acpi_desc->idts, list) { | |
499 | if (nfit_idt->idt->interleave_index != idt_idx) | |
500 | continue; | |
501 | nfit_mem->idt_dcr = nfit_idt->idt; | |
502 | break; | |
503 | } | |
b94d5230 DW |
504 | } else { |
505 | /* | |
506 | * A single dimm may belong to multiple SPA-PM | |
507 | * ranges, record at least one in addition to | |
508 | * any SPA-DCR range. | |
509 | */ | |
510 | nfit_mem->memdev_pmem = nfit_memdev->memdev; | |
511 | } | |
512 | ||
513 | if (found) | |
514 | continue; | |
515 | ||
516 | rc = nfit_mem_add(acpi_desc, nfit_mem, spa); | |
517 | if (rc) | |
518 | return rc; | |
519 | } | |
520 | ||
521 | return 0; | |
522 | } | |
523 | ||
524 | static int nfit_mem_cmp(void *priv, struct list_head *_a, struct list_head *_b) | |
525 | { | |
526 | struct nfit_mem *a = container_of(_a, typeof(*a), list); | |
527 | struct nfit_mem *b = container_of(_b, typeof(*b), list); | |
528 | u32 handleA, handleB; | |
529 | ||
530 | handleA = __to_nfit_memdev(a)->device_handle; | |
531 | handleB = __to_nfit_memdev(b)->device_handle; | |
532 | if (handleA < handleB) | |
533 | return -1; | |
534 | else if (handleA > handleB) | |
535 | return 1; | |
536 | return 0; | |
537 | } | |
538 | ||
539 | static int nfit_mem_init(struct acpi_nfit_desc *acpi_desc) | |
540 | { | |
541 | struct nfit_spa *nfit_spa; | |
542 | ||
543 | /* | |
544 | * For each SPA-DCR or SPA-PMEM address range find its | |
545 | * corresponding MEMDEV(s). From each MEMDEV find the | |
546 | * corresponding DCR. Then, if we're operating on a SPA-DCR, | |
547 | * try to find a SPA-BDW and a corresponding BDW that references | |
548 | * the DCR. Throw it all into an nfit_mem object. Note, that | |
549 | * BDWs are optional. | |
550 | */ | |
551 | list_for_each_entry(nfit_spa, &acpi_desc->spas, list) { | |
552 | int rc; | |
553 | ||
554 | rc = nfit_mem_dcr_init(acpi_desc, nfit_spa->spa); | |
555 | if (rc) | |
556 | return rc; | |
557 | } | |
558 | ||
559 | list_sort(NULL, &acpi_desc->dimms, nfit_mem_cmp); | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
45def22c DW |
564 | static ssize_t revision_show(struct device *dev, |
565 | struct device_attribute *attr, char *buf) | |
566 | { | |
567 | struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev); | |
568 | struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus); | |
569 | struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); | |
570 | ||
571 | return sprintf(buf, "%d\n", acpi_desc->nfit->header.revision); | |
572 | } | |
573 | static DEVICE_ATTR_RO(revision); | |
574 | ||
575 | static struct attribute *acpi_nfit_attributes[] = { | |
576 | &dev_attr_revision.attr, | |
577 | NULL, | |
578 | }; | |
579 | ||
580 | static struct attribute_group acpi_nfit_attribute_group = { | |
581 | .name = "nfit", | |
582 | .attrs = acpi_nfit_attributes, | |
583 | }; | |
584 | ||
6bc75619 | 585 | const struct attribute_group *acpi_nfit_attribute_groups[] = { |
45def22c DW |
586 | &nvdimm_bus_attribute_group, |
587 | &acpi_nfit_attribute_group, | |
588 | NULL, | |
589 | }; | |
6bc75619 | 590 | EXPORT_SYMBOL_GPL(acpi_nfit_attribute_groups); |
45def22c | 591 | |
e6dfb2de DW |
592 | static struct acpi_nfit_memory_map *to_nfit_memdev(struct device *dev) |
593 | { | |
594 | struct nvdimm *nvdimm = to_nvdimm(dev); | |
595 | struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); | |
596 | ||
597 | return __to_nfit_memdev(nfit_mem); | |
598 | } | |
599 | ||
600 | static struct acpi_nfit_control_region *to_nfit_dcr(struct device *dev) | |
601 | { | |
602 | struct nvdimm *nvdimm = to_nvdimm(dev); | |
603 | struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); | |
604 | ||
605 | return nfit_mem->dcr; | |
606 | } | |
607 | ||
608 | static ssize_t handle_show(struct device *dev, | |
609 | struct device_attribute *attr, char *buf) | |
610 | { | |
611 | struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev); | |
612 | ||
613 | return sprintf(buf, "%#x\n", memdev->device_handle); | |
614 | } | |
615 | static DEVICE_ATTR_RO(handle); | |
616 | ||
617 | static ssize_t phys_id_show(struct device *dev, | |
618 | struct device_attribute *attr, char *buf) | |
619 | { | |
620 | struct acpi_nfit_memory_map *memdev = to_nfit_memdev(dev); | |
621 | ||
622 | return sprintf(buf, "%#x\n", memdev->physical_id); | |
623 | } | |
624 | static DEVICE_ATTR_RO(phys_id); | |
625 | ||
626 | static ssize_t vendor_show(struct device *dev, | |
627 | struct device_attribute *attr, char *buf) | |
628 | { | |
629 | struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev); | |
630 | ||
631 | return sprintf(buf, "%#x\n", dcr->vendor_id); | |
632 | } | |
633 | static DEVICE_ATTR_RO(vendor); | |
634 | ||
635 | static ssize_t rev_id_show(struct device *dev, | |
636 | struct device_attribute *attr, char *buf) | |
637 | { | |
638 | struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev); | |
639 | ||
640 | return sprintf(buf, "%#x\n", dcr->revision_id); | |
641 | } | |
642 | static DEVICE_ATTR_RO(rev_id); | |
643 | ||
644 | static ssize_t device_show(struct device *dev, | |
645 | struct device_attribute *attr, char *buf) | |
646 | { | |
647 | struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev); | |
648 | ||
649 | return sprintf(buf, "%#x\n", dcr->device_id); | |
650 | } | |
651 | static DEVICE_ATTR_RO(device); | |
652 | ||
653 | static ssize_t format_show(struct device *dev, | |
654 | struct device_attribute *attr, char *buf) | |
655 | { | |
656 | struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev); | |
657 | ||
658 | return sprintf(buf, "%#x\n", dcr->code); | |
659 | } | |
660 | static DEVICE_ATTR_RO(format); | |
661 | ||
662 | static ssize_t serial_show(struct device *dev, | |
663 | struct device_attribute *attr, char *buf) | |
664 | { | |
665 | struct acpi_nfit_control_region *dcr = to_nfit_dcr(dev); | |
666 | ||
667 | return sprintf(buf, "%#x\n", dcr->serial_number); | |
668 | } | |
669 | static DEVICE_ATTR_RO(serial); | |
670 | ||
58138820 DW |
671 | static ssize_t flags_show(struct device *dev, |
672 | struct device_attribute *attr, char *buf) | |
673 | { | |
674 | u16 flags = to_nfit_memdev(dev)->flags; | |
675 | ||
676 | return sprintf(buf, "%s%s%s%s%s\n", | |
677 | flags & ACPI_NFIT_MEM_SAVE_FAILED ? "save " : "", | |
678 | flags & ACPI_NFIT_MEM_RESTORE_FAILED ? "restore " : "", | |
679 | flags & ACPI_NFIT_MEM_FLUSH_FAILED ? "flush " : "", | |
680 | flags & ACPI_NFIT_MEM_ARMED ? "arm " : "", | |
681 | flags & ACPI_NFIT_MEM_HEALTH_OBSERVED ? "smart " : ""); | |
682 | } | |
683 | static DEVICE_ATTR_RO(flags); | |
684 | ||
e6dfb2de DW |
685 | static struct attribute *acpi_nfit_dimm_attributes[] = { |
686 | &dev_attr_handle.attr, | |
687 | &dev_attr_phys_id.attr, | |
688 | &dev_attr_vendor.attr, | |
689 | &dev_attr_device.attr, | |
690 | &dev_attr_format.attr, | |
691 | &dev_attr_serial.attr, | |
692 | &dev_attr_rev_id.attr, | |
58138820 | 693 | &dev_attr_flags.attr, |
e6dfb2de DW |
694 | NULL, |
695 | }; | |
696 | ||
697 | static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj, | |
698 | struct attribute *a, int n) | |
699 | { | |
700 | struct device *dev = container_of(kobj, struct device, kobj); | |
701 | ||
702 | if (to_nfit_dcr(dev)) | |
703 | return a->mode; | |
704 | else | |
705 | return 0; | |
706 | } | |
707 | ||
708 | static struct attribute_group acpi_nfit_dimm_attribute_group = { | |
709 | .name = "nfit", | |
710 | .attrs = acpi_nfit_dimm_attributes, | |
711 | .is_visible = acpi_nfit_dimm_attr_visible, | |
712 | }; | |
713 | ||
714 | static const struct attribute_group *acpi_nfit_dimm_attribute_groups[] = { | |
62232e45 | 715 | &nvdimm_attribute_group, |
4d88a97a | 716 | &nd_device_attribute_group, |
e6dfb2de DW |
717 | &acpi_nfit_dimm_attribute_group, |
718 | NULL, | |
719 | }; | |
720 | ||
721 | static struct nvdimm *acpi_nfit_dimm_by_handle(struct acpi_nfit_desc *acpi_desc, | |
722 | u32 device_handle) | |
723 | { | |
724 | struct nfit_mem *nfit_mem; | |
725 | ||
726 | list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) | |
727 | if (__to_nfit_memdev(nfit_mem)->device_handle == device_handle) | |
728 | return nfit_mem->nvdimm; | |
729 | ||
730 | return NULL; | |
731 | } | |
732 | ||
62232e45 DW |
733 | static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, |
734 | struct nfit_mem *nfit_mem, u32 device_handle) | |
735 | { | |
736 | struct acpi_device *adev, *adev_dimm; | |
737 | struct device *dev = acpi_desc->dev; | |
738 | const u8 *uuid = to_nfit_uuid(NFIT_DEV_DIMM); | |
739 | unsigned long long sta; | |
740 | int i, rc = -ENODEV; | |
741 | acpi_status status; | |
742 | ||
743 | nfit_mem->dsm_mask = acpi_desc->dimm_dsm_force_en; | |
744 | adev = to_acpi_dev(acpi_desc); | |
745 | if (!adev) | |
746 | return 0; | |
747 | ||
748 | adev_dimm = acpi_find_child_device(adev, device_handle, false); | |
749 | nfit_mem->adev = adev_dimm; | |
750 | if (!adev_dimm) { | |
751 | dev_err(dev, "no ACPI.NFIT device with _ADR %#x, disabling...\n", | |
752 | device_handle); | |
4d88a97a | 753 | return force_enable_dimms ? 0 : -ENODEV; |
62232e45 DW |
754 | } |
755 | ||
756 | status = acpi_evaluate_integer(adev_dimm->handle, "_STA", NULL, &sta); | |
757 | if (status == AE_NOT_FOUND) { | |
758 | dev_dbg(dev, "%s missing _STA, assuming enabled...\n", | |
759 | dev_name(&adev_dimm->dev)); | |
760 | rc = 0; | |
761 | } else if (ACPI_FAILURE(status)) | |
762 | dev_err(dev, "%s failed to retrieve_STA, disabling...\n", | |
763 | dev_name(&adev_dimm->dev)); | |
764 | else if ((sta & ACPI_STA_DEVICE_ENABLED) == 0) | |
765 | dev_info(dev, "%s disabled by firmware\n", | |
766 | dev_name(&adev_dimm->dev)); | |
767 | else | |
768 | rc = 0; | |
769 | ||
770 | for (i = ND_CMD_SMART; i <= ND_CMD_VENDOR; i++) | |
771 | if (acpi_check_dsm(adev_dimm->handle, uuid, 1, 1ULL << i)) | |
772 | set_bit(i, &nfit_mem->dsm_mask); | |
773 | ||
4d88a97a | 774 | return force_enable_dimms ? 0 : rc; |
62232e45 DW |
775 | } |
776 | ||
e6dfb2de DW |
777 | static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) |
778 | { | |
779 | struct nfit_mem *nfit_mem; | |
4d88a97a | 780 | int dimm_count = 0; |
e6dfb2de DW |
781 | |
782 | list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) { | |
783 | struct nvdimm *nvdimm; | |
784 | unsigned long flags = 0; | |
785 | u32 device_handle; | |
58138820 | 786 | u16 mem_flags; |
62232e45 | 787 | int rc; |
e6dfb2de DW |
788 | |
789 | device_handle = __to_nfit_memdev(nfit_mem)->device_handle; | |
790 | nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, device_handle); | |
791 | if (nvdimm) { | |
792 | /* | |
793 | * If for some reason we find multiple DCRs the | |
794 | * first one wins | |
795 | */ | |
796 | dev_err(acpi_desc->dev, "duplicate DCR detected: %s\n", | |
797 | nvdimm_name(nvdimm)); | |
798 | continue; | |
799 | } | |
800 | ||
801 | if (nfit_mem->bdw && nfit_mem->memdev_pmem) | |
802 | flags |= NDD_ALIASING; | |
803 | ||
58138820 DW |
804 | mem_flags = __to_nfit_memdev(nfit_mem)->flags; |
805 | if (mem_flags & ACPI_NFIT_MEM_ARMED) | |
806 | flags |= NDD_UNARMED; | |
807 | ||
62232e45 DW |
808 | rc = acpi_nfit_add_dimm(acpi_desc, nfit_mem, device_handle); |
809 | if (rc) | |
810 | continue; | |
811 | ||
e6dfb2de | 812 | nvdimm = nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem, |
62232e45 DW |
813 | acpi_nfit_dimm_attribute_groups, |
814 | flags, &nfit_mem->dsm_mask); | |
e6dfb2de DW |
815 | if (!nvdimm) |
816 | return -ENOMEM; | |
817 | ||
818 | nfit_mem->nvdimm = nvdimm; | |
4d88a97a | 819 | dimm_count++; |
58138820 DW |
820 | |
821 | if ((mem_flags & ACPI_NFIT_MEM_FAILED_MASK) == 0) | |
822 | continue; | |
823 | ||
824 | dev_info(acpi_desc->dev, "%s: failed: %s%s%s%s\n", | |
825 | nvdimm_name(nvdimm), | |
826 | mem_flags & ACPI_NFIT_MEM_SAVE_FAILED ? "save " : "", | |
827 | mem_flags & ACPI_NFIT_MEM_RESTORE_FAILED ? "restore " : "", | |
828 | mem_flags & ACPI_NFIT_MEM_FLUSH_FAILED ? "flush " : "", | |
829 | mem_flags & ACPI_NFIT_MEM_ARMED ? "arm " : ""); | |
830 | ||
e6dfb2de DW |
831 | } |
832 | ||
4d88a97a | 833 | return nvdimm_bus_check_dimm_count(acpi_desc->nvdimm_bus, dimm_count); |
e6dfb2de DW |
834 | } |
835 | ||
62232e45 DW |
836 | static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc) |
837 | { | |
838 | struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc; | |
839 | const u8 *uuid = to_nfit_uuid(NFIT_DEV_BUS); | |
840 | struct acpi_device *adev; | |
841 | int i; | |
842 | ||
843 | adev = to_acpi_dev(acpi_desc); | |
844 | if (!adev) | |
845 | return; | |
846 | ||
847 | for (i = ND_CMD_ARS_CAP; i <= ND_CMD_ARS_STATUS; i++) | |
848 | if (acpi_check_dsm(adev->handle, uuid, 1, 1ULL << i)) | |
849 | set_bit(i, &nd_desc->dsm_mask); | |
850 | } | |
851 | ||
1f7df6f8 DW |
852 | static ssize_t range_index_show(struct device *dev, |
853 | struct device_attribute *attr, char *buf) | |
854 | { | |
855 | struct nd_region *nd_region = to_nd_region(dev); | |
856 | struct nfit_spa *nfit_spa = nd_region_provider_data(nd_region); | |
857 | ||
858 | return sprintf(buf, "%d\n", nfit_spa->spa->range_index); | |
859 | } | |
860 | static DEVICE_ATTR_RO(range_index); | |
861 | ||
862 | static struct attribute *acpi_nfit_region_attributes[] = { | |
863 | &dev_attr_range_index.attr, | |
864 | NULL, | |
865 | }; | |
866 | ||
867 | static struct attribute_group acpi_nfit_region_attribute_group = { | |
868 | .name = "nfit", | |
869 | .attrs = acpi_nfit_region_attributes, | |
870 | }; | |
871 | ||
872 | static const struct attribute_group *acpi_nfit_region_attribute_groups[] = { | |
873 | &nd_region_attribute_group, | |
874 | &nd_mapping_attribute_group, | |
3d88002e | 875 | &nd_device_attribute_group, |
1f7df6f8 DW |
876 | &acpi_nfit_region_attribute_group, |
877 | NULL, | |
878 | }; | |
879 | ||
eaf96153 DW |
880 | /* enough info to uniquely specify an interleave set */ |
881 | struct nfit_set_info { | |
882 | struct nfit_set_info_map { | |
883 | u64 region_offset; | |
884 | u32 serial_number; | |
885 | u32 pad; | |
886 | } mapping[0]; | |
887 | }; | |
888 | ||
889 | static size_t sizeof_nfit_set_info(int num_mappings) | |
890 | { | |
891 | return sizeof(struct nfit_set_info) | |
892 | + num_mappings * sizeof(struct nfit_set_info_map); | |
893 | } | |
894 | ||
895 | static int cmp_map(const void *m0, const void *m1) | |
896 | { | |
897 | const struct nfit_set_info_map *map0 = m0; | |
898 | const struct nfit_set_info_map *map1 = m1; | |
899 | ||
900 | return memcmp(&map0->region_offset, &map1->region_offset, | |
901 | sizeof(u64)); | |
902 | } | |
903 | ||
904 | /* Retrieve the nth entry referencing this spa */ | |
905 | static struct acpi_nfit_memory_map *memdev_from_spa( | |
906 | struct acpi_nfit_desc *acpi_desc, u16 range_index, int n) | |
907 | { | |
908 | struct nfit_memdev *nfit_memdev; | |
909 | ||
910 | list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) | |
911 | if (nfit_memdev->memdev->range_index == range_index) | |
912 | if (n-- == 0) | |
913 | return nfit_memdev->memdev; | |
914 | return NULL; | |
915 | } | |
916 | ||
917 | static int acpi_nfit_init_interleave_set(struct acpi_nfit_desc *acpi_desc, | |
918 | struct nd_region_desc *ndr_desc, | |
919 | struct acpi_nfit_system_address *spa) | |
920 | { | |
921 | int i, spa_type = nfit_spa_type(spa); | |
922 | struct device *dev = acpi_desc->dev; | |
923 | struct nd_interleave_set *nd_set; | |
924 | u16 nr = ndr_desc->num_mappings; | |
925 | struct nfit_set_info *info; | |
926 | ||
927 | if (spa_type == NFIT_SPA_PM || spa_type == NFIT_SPA_VOLATILE) | |
928 | /* pass */; | |
929 | else | |
930 | return 0; | |
931 | ||
932 | nd_set = devm_kzalloc(dev, sizeof(*nd_set), GFP_KERNEL); | |
933 | if (!nd_set) | |
934 | return -ENOMEM; | |
935 | ||
936 | info = devm_kzalloc(dev, sizeof_nfit_set_info(nr), GFP_KERNEL); | |
937 | if (!info) | |
938 | return -ENOMEM; | |
939 | for (i = 0; i < nr; i++) { | |
940 | struct nd_mapping *nd_mapping = &ndr_desc->nd_mapping[i]; | |
941 | struct nfit_set_info_map *map = &info->mapping[i]; | |
942 | struct nvdimm *nvdimm = nd_mapping->nvdimm; | |
943 | struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); | |
944 | struct acpi_nfit_memory_map *memdev = memdev_from_spa(acpi_desc, | |
945 | spa->range_index, i); | |
946 | ||
947 | if (!memdev || !nfit_mem->dcr) { | |
948 | dev_err(dev, "%s: failed to find DCR\n", __func__); | |
949 | return -ENODEV; | |
950 | } | |
951 | ||
952 | map->region_offset = memdev->region_offset; | |
953 | map->serial_number = nfit_mem->dcr->serial_number; | |
954 | } | |
955 | ||
956 | sort(&info->mapping[0], nr, sizeof(struct nfit_set_info_map), | |
957 | cmp_map, NULL); | |
958 | nd_set->cookie = nd_fletcher64(info, sizeof_nfit_set_info(nr), 0); | |
959 | ndr_desc->nd_set = nd_set; | |
960 | devm_kfree(dev, info); | |
961 | ||
962 | return 0; | |
963 | } | |
964 | ||
047fc8a1 RZ |
965 | static u64 to_interleave_offset(u64 offset, struct nfit_blk_mmio *mmio) |
966 | { | |
967 | struct acpi_nfit_interleave *idt = mmio->idt; | |
968 | u32 sub_line_offset, line_index, line_offset; | |
969 | u64 line_no, table_skip_count, table_offset; | |
970 | ||
971 | line_no = div_u64_rem(offset, mmio->line_size, &sub_line_offset); | |
972 | table_skip_count = div_u64_rem(line_no, mmio->num_lines, &line_index); | |
973 | line_offset = idt->line_offset[line_index] | |
974 | * mmio->line_size; | |
975 | table_offset = table_skip_count * mmio->table_size; | |
976 | ||
977 | return mmio->base_offset + line_offset + table_offset + sub_line_offset; | |
978 | } | |
979 | ||
980 | static u64 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw) | |
981 | { | |
982 | struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR]; | |
983 | u64 offset = nfit_blk->stat_offset + mmio->size * bw; | |
984 | ||
985 | if (mmio->num_lines) | |
986 | offset = to_interleave_offset(offset, mmio); | |
987 | ||
988 | return readq(mmio->base + offset); | |
989 | } | |
990 | ||
991 | static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw, | |
992 | resource_size_t dpa, unsigned int len, unsigned int write) | |
993 | { | |
994 | u64 cmd, offset; | |
995 | struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR]; | |
996 | ||
997 | enum { | |
998 | BCW_OFFSET_MASK = (1ULL << 48)-1, | |
999 | BCW_LEN_SHIFT = 48, | |
1000 | BCW_LEN_MASK = (1ULL << 8) - 1, | |
1001 | BCW_CMD_SHIFT = 56, | |
1002 | }; | |
1003 | ||
1004 | cmd = (dpa >> L1_CACHE_SHIFT) & BCW_OFFSET_MASK; | |
1005 | len = len >> L1_CACHE_SHIFT; | |
1006 | cmd |= ((u64) len & BCW_LEN_MASK) << BCW_LEN_SHIFT; | |
1007 | cmd |= ((u64) write) << BCW_CMD_SHIFT; | |
1008 | ||
1009 | offset = nfit_blk->cmd_offset + mmio->size * bw; | |
1010 | if (mmio->num_lines) | |
1011 | offset = to_interleave_offset(offset, mmio); | |
1012 | ||
1013 | writeq(cmd, mmio->base + offset); | |
1014 | /* FIXME: conditionally perform read-back if mandated by firmware */ | |
1015 | } | |
1016 | ||
1017 | static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk, | |
1018 | resource_size_t dpa, void *iobuf, size_t len, int rw, | |
1019 | unsigned int lane) | |
1020 | { | |
1021 | struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW]; | |
1022 | unsigned int copied = 0; | |
1023 | u64 base_offset; | |
1024 | int rc; | |
1025 | ||
1026 | base_offset = nfit_blk->bdw_offset + dpa % L1_CACHE_BYTES | |
1027 | + lane * mmio->size; | |
1028 | /* TODO: non-temporal access, flush hints, cache management etc... */ | |
1029 | write_blk_ctl(nfit_blk, lane, dpa, len, rw); | |
1030 | while (len) { | |
1031 | unsigned int c; | |
1032 | u64 offset; | |
1033 | ||
1034 | if (mmio->num_lines) { | |
1035 | u32 line_offset; | |
1036 | ||
1037 | offset = to_interleave_offset(base_offset + copied, | |
1038 | mmio); | |
1039 | div_u64_rem(offset, mmio->line_size, &line_offset); | |
1040 | c = min_t(size_t, len, mmio->line_size - line_offset); | |
1041 | } else { | |
1042 | offset = base_offset + nfit_blk->bdw_offset; | |
1043 | c = len; | |
1044 | } | |
1045 | ||
1046 | if (rw) | |
1047 | memcpy(mmio->aperture + offset, iobuf + copied, c); | |
1048 | else | |
1049 | memcpy(iobuf + copied, mmio->aperture + offset, c); | |
1050 | ||
1051 | copied += c; | |
1052 | len -= c; | |
1053 | } | |
1054 | rc = read_blk_stat(nfit_blk, lane) ? -EIO : 0; | |
1055 | return rc; | |
1056 | } | |
1057 | ||
1058 | static int acpi_nfit_blk_region_do_io(struct nd_blk_region *ndbr, | |
1059 | resource_size_t dpa, void *iobuf, u64 len, int rw) | |
1060 | { | |
1061 | struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr); | |
1062 | struct nfit_blk_mmio *mmio = &nfit_blk->mmio[BDW]; | |
1063 | struct nd_region *nd_region = nfit_blk->nd_region; | |
1064 | unsigned int lane, copied = 0; | |
1065 | int rc = 0; | |
1066 | ||
1067 | lane = nd_region_acquire_lane(nd_region); | |
1068 | while (len) { | |
1069 | u64 c = min(len, mmio->size); | |
1070 | ||
1071 | rc = acpi_nfit_blk_single_io(nfit_blk, dpa + copied, | |
1072 | iobuf + copied, c, rw, lane); | |
1073 | if (rc) | |
1074 | break; | |
1075 | ||
1076 | copied += c; | |
1077 | len -= c; | |
1078 | } | |
1079 | nd_region_release_lane(nd_region, lane); | |
1080 | ||
1081 | return rc; | |
1082 | } | |
1083 | ||
1084 | static void nfit_spa_mapping_release(struct kref *kref) | |
1085 | { | |
1086 | struct nfit_spa_mapping *spa_map = to_spa_map(kref); | |
1087 | struct acpi_nfit_system_address *spa = spa_map->spa; | |
1088 | struct acpi_nfit_desc *acpi_desc = spa_map->acpi_desc; | |
1089 | ||
1090 | WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex)); | |
1091 | dev_dbg(acpi_desc->dev, "%s: SPA%d\n", __func__, spa->range_index); | |
1092 | iounmap(spa_map->iomem); | |
1093 | release_mem_region(spa->address, spa->length); | |
1094 | list_del(&spa_map->list); | |
1095 | kfree(spa_map); | |
1096 | } | |
1097 | ||
1098 | static struct nfit_spa_mapping *find_spa_mapping( | |
1099 | struct acpi_nfit_desc *acpi_desc, | |
1100 | struct acpi_nfit_system_address *spa) | |
1101 | { | |
1102 | struct nfit_spa_mapping *spa_map; | |
1103 | ||
1104 | WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex)); | |
1105 | list_for_each_entry(spa_map, &acpi_desc->spa_maps, list) | |
1106 | if (spa_map->spa == spa) | |
1107 | return spa_map; | |
1108 | ||
1109 | return NULL; | |
1110 | } | |
1111 | ||
1112 | static void nfit_spa_unmap(struct acpi_nfit_desc *acpi_desc, | |
1113 | struct acpi_nfit_system_address *spa) | |
1114 | { | |
1115 | struct nfit_spa_mapping *spa_map; | |
1116 | ||
1117 | mutex_lock(&acpi_desc->spa_map_mutex); | |
1118 | spa_map = find_spa_mapping(acpi_desc, spa); | |
1119 | ||
1120 | if (spa_map) | |
1121 | kref_put(&spa_map->kref, nfit_spa_mapping_release); | |
1122 | mutex_unlock(&acpi_desc->spa_map_mutex); | |
1123 | } | |
1124 | ||
1125 | static void __iomem *__nfit_spa_map(struct acpi_nfit_desc *acpi_desc, | |
1126 | struct acpi_nfit_system_address *spa) | |
1127 | { | |
1128 | resource_size_t start = spa->address; | |
1129 | resource_size_t n = spa->length; | |
1130 | struct nfit_spa_mapping *spa_map; | |
1131 | struct resource *res; | |
1132 | ||
1133 | WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex)); | |
1134 | ||
1135 | spa_map = find_spa_mapping(acpi_desc, spa); | |
1136 | if (spa_map) { | |
1137 | kref_get(&spa_map->kref); | |
1138 | return spa_map->iomem; | |
1139 | } | |
1140 | ||
1141 | spa_map = kzalloc(sizeof(*spa_map), GFP_KERNEL); | |
1142 | if (!spa_map) | |
1143 | return NULL; | |
1144 | ||
1145 | INIT_LIST_HEAD(&spa_map->list); | |
1146 | spa_map->spa = spa; | |
1147 | kref_init(&spa_map->kref); | |
1148 | spa_map->acpi_desc = acpi_desc; | |
1149 | ||
1150 | res = request_mem_region(start, n, dev_name(acpi_desc->dev)); | |
1151 | if (!res) | |
1152 | goto err_mem; | |
1153 | ||
1154 | /* TODO: cacheability based on the spa type */ | |
1155 | spa_map->iomem = ioremap_nocache(start, n); | |
1156 | if (!spa_map->iomem) | |
1157 | goto err_map; | |
1158 | ||
1159 | list_add_tail(&spa_map->list, &acpi_desc->spa_maps); | |
1160 | return spa_map->iomem; | |
1161 | ||
1162 | err_map: | |
1163 | release_mem_region(start, n); | |
1164 | err_mem: | |
1165 | kfree(spa_map); | |
1166 | return NULL; | |
1167 | } | |
1168 | ||
1169 | /** | |
1170 | * nfit_spa_map - interleave-aware managed-mappings of acpi_nfit_system_address ranges | |
1171 | * @nvdimm_bus: NFIT-bus that provided the spa table entry | |
1172 | * @nfit_spa: spa table to map | |
1173 | * | |
1174 | * In the case where block-data-window apertures and | |
1175 | * dimm-control-regions are interleaved they will end up sharing a | |
1176 | * single request_mem_region() + ioremap() for the address range. In | |
1177 | * the style of devm nfit_spa_map() mappings are automatically dropped | |
1178 | * when all region devices referencing the same mapping are disabled / | |
1179 | * unbound. | |
1180 | */ | |
1181 | static void __iomem *nfit_spa_map(struct acpi_nfit_desc *acpi_desc, | |
1182 | struct acpi_nfit_system_address *spa) | |
1183 | { | |
1184 | void __iomem *iomem; | |
1185 | ||
1186 | mutex_lock(&acpi_desc->spa_map_mutex); | |
1187 | iomem = __nfit_spa_map(acpi_desc, spa); | |
1188 | mutex_unlock(&acpi_desc->spa_map_mutex); | |
1189 | ||
1190 | return iomem; | |
1191 | } | |
1192 | ||
1193 | static int nfit_blk_init_interleave(struct nfit_blk_mmio *mmio, | |
1194 | struct acpi_nfit_interleave *idt, u16 interleave_ways) | |
1195 | { | |
1196 | if (idt) { | |
1197 | mmio->num_lines = idt->line_count; | |
1198 | mmio->line_size = idt->line_size; | |
1199 | if (interleave_ways == 0) | |
1200 | return -ENXIO; | |
1201 | mmio->table_size = mmio->num_lines * interleave_ways | |
1202 | * mmio->line_size; | |
1203 | } | |
1204 | ||
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus, | |
1209 | struct device *dev) | |
1210 | { | |
1211 | struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus); | |
1212 | struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); | |
1213 | struct nd_blk_region *ndbr = to_nd_blk_region(dev); | |
1214 | struct nfit_blk_mmio *mmio; | |
1215 | struct nfit_blk *nfit_blk; | |
1216 | struct nfit_mem *nfit_mem; | |
1217 | struct nvdimm *nvdimm; | |
1218 | int rc; | |
1219 | ||
1220 | nvdimm = nd_blk_region_to_dimm(ndbr); | |
1221 | nfit_mem = nvdimm_provider_data(nvdimm); | |
1222 | if (!nfit_mem || !nfit_mem->dcr || !nfit_mem->bdw) { | |
1223 | dev_dbg(dev, "%s: missing%s%s%s\n", __func__, | |
1224 | nfit_mem ? "" : " nfit_mem", | |
1225 | nfit_mem->dcr ? "" : " dcr", | |
1226 | nfit_mem->bdw ? "" : " bdw"); | |
1227 | return -ENXIO; | |
1228 | } | |
1229 | ||
1230 | nfit_blk = devm_kzalloc(dev, sizeof(*nfit_blk), GFP_KERNEL); | |
1231 | if (!nfit_blk) | |
1232 | return -ENOMEM; | |
1233 | nd_blk_region_set_provider_data(ndbr, nfit_blk); | |
1234 | nfit_blk->nd_region = to_nd_region(dev); | |
1235 | ||
1236 | /* map block aperture memory */ | |
1237 | nfit_blk->bdw_offset = nfit_mem->bdw->offset; | |
1238 | mmio = &nfit_blk->mmio[BDW]; | |
1239 | mmio->base = nfit_spa_map(acpi_desc, nfit_mem->spa_bdw); | |
1240 | if (!mmio->base) { | |
1241 | dev_dbg(dev, "%s: %s failed to map bdw\n", __func__, | |
1242 | nvdimm_name(nvdimm)); | |
1243 | return -ENOMEM; | |
1244 | } | |
1245 | mmio->size = nfit_mem->bdw->size; | |
1246 | mmio->base_offset = nfit_mem->memdev_bdw->region_offset; | |
1247 | mmio->idt = nfit_mem->idt_bdw; | |
1248 | mmio->spa = nfit_mem->spa_bdw; | |
1249 | rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_bdw, | |
1250 | nfit_mem->memdev_bdw->interleave_ways); | |
1251 | if (rc) { | |
1252 | dev_dbg(dev, "%s: %s failed to init bdw interleave\n", | |
1253 | __func__, nvdimm_name(nvdimm)); | |
1254 | return rc; | |
1255 | } | |
1256 | ||
1257 | /* map block control memory */ | |
1258 | nfit_blk->cmd_offset = nfit_mem->dcr->command_offset; | |
1259 | nfit_blk->stat_offset = nfit_mem->dcr->status_offset; | |
1260 | mmio = &nfit_blk->mmio[DCR]; | |
1261 | mmio->base = nfit_spa_map(acpi_desc, nfit_mem->spa_dcr); | |
1262 | if (!mmio->base) { | |
1263 | dev_dbg(dev, "%s: %s failed to map dcr\n", __func__, | |
1264 | nvdimm_name(nvdimm)); | |
1265 | return -ENOMEM; | |
1266 | } | |
1267 | mmio->size = nfit_mem->dcr->window_size; | |
1268 | mmio->base_offset = nfit_mem->memdev_dcr->region_offset; | |
1269 | mmio->idt = nfit_mem->idt_dcr; | |
1270 | mmio->spa = nfit_mem->spa_dcr; | |
1271 | rc = nfit_blk_init_interleave(mmio, nfit_mem->idt_dcr, | |
1272 | nfit_mem->memdev_dcr->interleave_ways); | |
1273 | if (rc) { | |
1274 | dev_dbg(dev, "%s: %s failed to init dcr interleave\n", | |
1275 | __func__, nvdimm_name(nvdimm)); | |
1276 | return rc; | |
1277 | } | |
1278 | ||
1279 | if (mmio->line_size == 0) | |
1280 | return 0; | |
1281 | ||
1282 | if ((u32) nfit_blk->cmd_offset % mmio->line_size | |
1283 | + 8 > mmio->line_size) { | |
1284 | dev_dbg(dev, "cmd_offset crosses interleave boundary\n"); | |
1285 | return -ENXIO; | |
1286 | } else if ((u32) nfit_blk->stat_offset % mmio->line_size | |
1287 | + 8 > mmio->line_size) { | |
1288 | dev_dbg(dev, "stat_offset crosses interleave boundary\n"); | |
1289 | return -ENXIO; | |
1290 | } | |
1291 | ||
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | static void acpi_nfit_blk_region_disable(struct nvdimm_bus *nvdimm_bus, | |
1296 | struct device *dev) | |
1297 | { | |
1298 | struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus); | |
1299 | struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); | |
1300 | struct nd_blk_region *ndbr = to_nd_blk_region(dev); | |
1301 | struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr); | |
1302 | int i; | |
1303 | ||
1304 | if (!nfit_blk) | |
1305 | return; /* never enabled */ | |
1306 | ||
1307 | /* auto-free BLK spa mappings */ | |
1308 | for (i = 0; i < 2; i++) { | |
1309 | struct nfit_blk_mmio *mmio = &nfit_blk->mmio[i]; | |
1310 | ||
1311 | if (mmio->base) | |
1312 | nfit_spa_unmap(acpi_desc, mmio->spa); | |
1313 | } | |
1314 | nd_blk_region_set_provider_data(ndbr, NULL); | |
1315 | /* devm will free nfit_blk */ | |
1316 | } | |
1317 | ||
1f7df6f8 DW |
1318 | static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc, |
1319 | struct nd_mapping *nd_mapping, struct nd_region_desc *ndr_desc, | |
1320 | struct acpi_nfit_memory_map *memdev, | |
1321 | struct acpi_nfit_system_address *spa) | |
1322 | { | |
1323 | struct nvdimm *nvdimm = acpi_nfit_dimm_by_handle(acpi_desc, | |
1324 | memdev->device_handle); | |
047fc8a1 | 1325 | struct nd_blk_region_desc *ndbr_desc; |
1f7df6f8 DW |
1326 | struct nfit_mem *nfit_mem; |
1327 | int blk_valid = 0; | |
1328 | ||
1329 | if (!nvdimm) { | |
1330 | dev_err(acpi_desc->dev, "spa%d dimm: %#x not found\n", | |
1331 | spa->range_index, memdev->device_handle); | |
1332 | return -ENODEV; | |
1333 | } | |
1334 | ||
1335 | nd_mapping->nvdimm = nvdimm; | |
1336 | switch (nfit_spa_type(spa)) { | |
1337 | case NFIT_SPA_PM: | |
1338 | case NFIT_SPA_VOLATILE: | |
1339 | nd_mapping->start = memdev->address; | |
1340 | nd_mapping->size = memdev->region_size; | |
1341 | break; | |
1342 | case NFIT_SPA_DCR: | |
1343 | nfit_mem = nvdimm_provider_data(nvdimm); | |
1344 | if (!nfit_mem || !nfit_mem->bdw) { | |
1345 | dev_dbg(acpi_desc->dev, "spa%d %s missing bdw\n", | |
1346 | spa->range_index, nvdimm_name(nvdimm)); | |
1347 | } else { | |
1348 | nd_mapping->size = nfit_mem->bdw->capacity; | |
1349 | nd_mapping->start = nfit_mem->bdw->start_address; | |
5212e11f | 1350 | ndr_desc->num_lanes = nfit_mem->bdw->windows; |
1f7df6f8 DW |
1351 | blk_valid = 1; |
1352 | } | |
1353 | ||
1354 | ndr_desc->nd_mapping = nd_mapping; | |
1355 | ndr_desc->num_mappings = blk_valid; | |
047fc8a1 RZ |
1356 | ndbr_desc = to_blk_region_desc(ndr_desc); |
1357 | ndbr_desc->enable = acpi_nfit_blk_region_enable; | |
1358 | ndbr_desc->disable = acpi_nfit_blk_region_disable; | |
6bc75619 | 1359 | ndbr_desc->do_io = acpi_desc->blk_do_io; |
1f7df6f8 DW |
1360 | if (!nvdimm_blk_region_create(acpi_desc->nvdimm_bus, ndr_desc)) |
1361 | return -ENOMEM; | |
1362 | break; | |
1363 | } | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, | |
1369 | struct nfit_spa *nfit_spa) | |
1370 | { | |
1371 | static struct nd_mapping nd_mappings[ND_MAX_MAPPINGS]; | |
1372 | struct acpi_nfit_system_address *spa = nfit_spa->spa; | |
047fc8a1 RZ |
1373 | struct nd_blk_region_desc ndbr_desc; |
1374 | struct nd_region_desc *ndr_desc; | |
1f7df6f8 | 1375 | struct nfit_memdev *nfit_memdev; |
1f7df6f8 DW |
1376 | struct nvdimm_bus *nvdimm_bus; |
1377 | struct resource res; | |
eaf96153 | 1378 | int count = 0, rc; |
1f7df6f8 DW |
1379 | |
1380 | if (spa->range_index == 0) { | |
1381 | dev_dbg(acpi_desc->dev, "%s: detected invalid spa index\n", | |
1382 | __func__); | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | memset(&res, 0, sizeof(res)); | |
1387 | memset(&nd_mappings, 0, sizeof(nd_mappings)); | |
047fc8a1 | 1388 | memset(&ndbr_desc, 0, sizeof(ndbr_desc)); |
1f7df6f8 DW |
1389 | res.start = spa->address; |
1390 | res.end = res.start + spa->length - 1; | |
047fc8a1 RZ |
1391 | ndr_desc = &ndbr_desc.ndr_desc; |
1392 | ndr_desc->res = &res; | |
1393 | ndr_desc->provider_data = nfit_spa; | |
1394 | ndr_desc->attr_groups = acpi_nfit_region_attribute_groups; | |
1f7df6f8 DW |
1395 | list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) { |
1396 | struct acpi_nfit_memory_map *memdev = nfit_memdev->memdev; | |
1397 | struct nd_mapping *nd_mapping; | |
1f7df6f8 DW |
1398 | |
1399 | if (memdev->range_index != spa->range_index) | |
1400 | continue; | |
1401 | if (count >= ND_MAX_MAPPINGS) { | |
1402 | dev_err(acpi_desc->dev, "spa%d exceeds max mappings %d\n", | |
1403 | spa->range_index, ND_MAX_MAPPINGS); | |
1404 | return -ENXIO; | |
1405 | } | |
1406 | nd_mapping = &nd_mappings[count++]; | |
047fc8a1 | 1407 | rc = acpi_nfit_init_mapping(acpi_desc, nd_mapping, ndr_desc, |
1f7df6f8 DW |
1408 | memdev, spa); |
1409 | if (rc) | |
1410 | return rc; | |
1411 | } | |
1412 | ||
047fc8a1 RZ |
1413 | ndr_desc->nd_mapping = nd_mappings; |
1414 | ndr_desc->num_mappings = count; | |
1415 | rc = acpi_nfit_init_interleave_set(acpi_desc, ndr_desc, spa); | |
eaf96153 DW |
1416 | if (rc) |
1417 | return rc; | |
1418 | ||
1f7df6f8 DW |
1419 | nvdimm_bus = acpi_desc->nvdimm_bus; |
1420 | if (nfit_spa_type(spa) == NFIT_SPA_PM) { | |
047fc8a1 | 1421 | if (!nvdimm_pmem_region_create(nvdimm_bus, ndr_desc)) |
1f7df6f8 DW |
1422 | return -ENOMEM; |
1423 | } else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE) { | |
047fc8a1 | 1424 | if (!nvdimm_volatile_region_create(nvdimm_bus, ndr_desc)) |
1f7df6f8 DW |
1425 | return -ENOMEM; |
1426 | } | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc) | |
1431 | { | |
1432 | struct nfit_spa *nfit_spa; | |
1433 | ||
1434 | list_for_each_entry(nfit_spa, &acpi_desc->spas, list) { | |
1435 | int rc = acpi_nfit_register_region(acpi_desc, nfit_spa); | |
1436 | ||
1437 | if (rc) | |
1438 | return rc; | |
1439 | } | |
1440 | return 0; | |
1441 | } | |
1442 | ||
6bc75619 | 1443 | int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz) |
b94d5230 DW |
1444 | { |
1445 | struct device *dev = acpi_desc->dev; | |
1446 | const void *end; | |
1447 | u8 *data; | |
1f7df6f8 | 1448 | int rc; |
b94d5230 | 1449 | |
047fc8a1 | 1450 | INIT_LIST_HEAD(&acpi_desc->spa_maps); |
b94d5230 DW |
1451 | INIT_LIST_HEAD(&acpi_desc->spas); |
1452 | INIT_LIST_HEAD(&acpi_desc->dcrs); | |
1453 | INIT_LIST_HEAD(&acpi_desc->bdws); | |
047fc8a1 | 1454 | INIT_LIST_HEAD(&acpi_desc->idts); |
b94d5230 DW |
1455 | INIT_LIST_HEAD(&acpi_desc->memdevs); |
1456 | INIT_LIST_HEAD(&acpi_desc->dimms); | |
047fc8a1 | 1457 | mutex_init(&acpi_desc->spa_map_mutex); |
b94d5230 DW |
1458 | |
1459 | data = (u8 *) acpi_desc->nfit; | |
1460 | end = data + sz; | |
1461 | data += sizeof(struct acpi_table_nfit); | |
1462 | while (!IS_ERR_OR_NULL(data)) | |
1463 | data = add_table(acpi_desc, data, end); | |
1464 | ||
1465 | if (IS_ERR(data)) { | |
1466 | dev_dbg(dev, "%s: nfit table parsing error: %ld\n", __func__, | |
1467 | PTR_ERR(data)); | |
1468 | return PTR_ERR(data); | |
1469 | } | |
1470 | ||
1471 | if (nfit_mem_init(acpi_desc) != 0) | |
1472 | return -ENOMEM; | |
1473 | ||
62232e45 DW |
1474 | acpi_nfit_init_dsms(acpi_desc); |
1475 | ||
1f7df6f8 DW |
1476 | rc = acpi_nfit_register_dimms(acpi_desc); |
1477 | if (rc) | |
1478 | return rc; | |
1479 | ||
1480 | return acpi_nfit_register_regions(acpi_desc); | |
b94d5230 | 1481 | } |
6bc75619 | 1482 | EXPORT_SYMBOL_GPL(acpi_nfit_init); |
b94d5230 DW |
1483 | |
1484 | static int acpi_nfit_add(struct acpi_device *adev) | |
1485 | { | |
1486 | struct nvdimm_bus_descriptor *nd_desc; | |
1487 | struct acpi_nfit_desc *acpi_desc; | |
1488 | struct device *dev = &adev->dev; | |
1489 | struct acpi_table_header *tbl; | |
1490 | acpi_status status = AE_OK; | |
1491 | acpi_size sz; | |
1492 | int rc; | |
1493 | ||
1494 | status = acpi_get_table_with_size("NFIT", 0, &tbl, &sz); | |
1495 | if (ACPI_FAILURE(status)) { | |
1496 | dev_err(dev, "failed to find NFIT\n"); | |
1497 | return -ENXIO; | |
1498 | } | |
1499 | ||
1500 | acpi_desc = devm_kzalloc(dev, sizeof(*acpi_desc), GFP_KERNEL); | |
1501 | if (!acpi_desc) | |
1502 | return -ENOMEM; | |
1503 | ||
1504 | dev_set_drvdata(dev, acpi_desc); | |
1505 | acpi_desc->dev = dev; | |
1506 | acpi_desc->nfit = (struct acpi_table_nfit *) tbl; | |
6bc75619 | 1507 | acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io; |
b94d5230 DW |
1508 | nd_desc = &acpi_desc->nd_desc; |
1509 | nd_desc->provider_name = "ACPI.NFIT"; | |
1510 | nd_desc->ndctl = acpi_nfit_ctl; | |
45def22c | 1511 | nd_desc->attr_groups = acpi_nfit_attribute_groups; |
b94d5230 DW |
1512 | |
1513 | acpi_desc->nvdimm_bus = nvdimm_bus_register(dev, nd_desc); | |
1514 | if (!acpi_desc->nvdimm_bus) | |
1515 | return -ENXIO; | |
1516 | ||
1517 | rc = acpi_nfit_init(acpi_desc, sz); | |
1518 | if (rc) { | |
1519 | nvdimm_bus_unregister(acpi_desc->nvdimm_bus); | |
1520 | return rc; | |
1521 | } | |
1522 | return 0; | |
1523 | } | |
1524 | ||
1525 | static int acpi_nfit_remove(struct acpi_device *adev) | |
1526 | { | |
1527 | struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(&adev->dev); | |
1528 | ||
1529 | nvdimm_bus_unregister(acpi_desc->nvdimm_bus); | |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | static const struct acpi_device_id acpi_nfit_ids[] = { | |
1534 | { "ACPI0012", 0 }, | |
1535 | { "", 0 }, | |
1536 | }; | |
1537 | MODULE_DEVICE_TABLE(acpi, acpi_nfit_ids); | |
1538 | ||
1539 | static struct acpi_driver acpi_nfit_driver = { | |
1540 | .name = KBUILD_MODNAME, | |
1541 | .ids = acpi_nfit_ids, | |
1542 | .ops = { | |
1543 | .add = acpi_nfit_add, | |
1544 | .remove = acpi_nfit_remove, | |
1545 | }, | |
1546 | }; | |
1547 | ||
1548 | static __init int nfit_init(void) | |
1549 | { | |
1550 | BUILD_BUG_ON(sizeof(struct acpi_table_nfit) != 40); | |
1551 | BUILD_BUG_ON(sizeof(struct acpi_nfit_system_address) != 56); | |
1552 | BUILD_BUG_ON(sizeof(struct acpi_nfit_memory_map) != 48); | |
1553 | BUILD_BUG_ON(sizeof(struct acpi_nfit_interleave) != 20); | |
1554 | BUILD_BUG_ON(sizeof(struct acpi_nfit_smbios) != 9); | |
1555 | BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80); | |
1556 | BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40); | |
1557 | ||
1558 | acpi_str_to_uuid(UUID_VOLATILE_MEMORY, nfit_uuid[NFIT_SPA_VOLATILE]); | |
1559 | acpi_str_to_uuid(UUID_PERSISTENT_MEMORY, nfit_uuid[NFIT_SPA_PM]); | |
1560 | acpi_str_to_uuid(UUID_CONTROL_REGION, nfit_uuid[NFIT_SPA_DCR]); | |
1561 | acpi_str_to_uuid(UUID_DATA_REGION, nfit_uuid[NFIT_SPA_BDW]); | |
1562 | acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_VDISK]); | |
1563 | acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_CD, nfit_uuid[NFIT_SPA_VCD]); | |
1564 | acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_PDISK]); | |
1565 | acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_CD, nfit_uuid[NFIT_SPA_PCD]); | |
1566 | acpi_str_to_uuid(UUID_NFIT_BUS, nfit_uuid[NFIT_DEV_BUS]); | |
1567 | acpi_str_to_uuid(UUID_NFIT_DIMM, nfit_uuid[NFIT_DEV_DIMM]); | |
1568 | ||
1569 | return acpi_bus_register_driver(&acpi_nfit_driver); | |
1570 | } | |
1571 | ||
1572 | static __exit void nfit_exit(void) | |
1573 | { | |
1574 | acpi_bus_unregister_driver(&acpi_nfit_driver); | |
1575 | } | |
1576 | ||
1577 | module_init(nfit_init); | |
1578 | module_exit(nfit_exit); | |
1579 | MODULE_LICENSE("GPL v2"); | |
1580 | MODULE_AUTHOR("Intel Corporation"); |