1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright(c) 2021 Intel Corporation. All rights reserved.
3
4 #include <linux/platform_device.h>
5 #include <linux/genalloc.h>
6 #include <linux/module.h>
7 #include <linux/mutex.h>
8 #include <linux/acpi.h>
9 #include <linux/pci.h>
10 #include <linux/mm.h>
11 #include <cxlmem.h>
12
13 #include "../watermark.h"
14 #include "mock.h"
15
16 static int interleave_arithmetic;
17
18 #define NR_CXL_HOST_BRIDGES 2
19 #define NR_CXL_SINGLE_HOST 1
20 #define NR_CXL_RCH 1
21 #define NR_CXL_ROOT_PORTS 2
22 #define NR_CXL_SWITCH_PORTS 2
23 #define NR_CXL_PORT_DECODERS 8
24 #define NR_BRIDGES (NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST + NR_CXL_RCH)
25
26 static struct platform_device *cxl_acpi;
27 static struct platform_device *cxl_host_bridge[NR_CXL_HOST_BRIDGES];
28 #define NR_MULTI_ROOT (NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS)
29 static struct platform_device *cxl_root_port[NR_MULTI_ROOT];
30 static struct platform_device *cxl_switch_uport[NR_MULTI_ROOT];
31 #define NR_MEM_MULTI \
32 (NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS * NR_CXL_SWITCH_PORTS)
33 static struct platform_device *cxl_switch_dport[NR_MEM_MULTI];
34
35 static struct platform_device *cxl_hb_single[NR_CXL_SINGLE_HOST];
36 static struct platform_device *cxl_root_single[NR_CXL_SINGLE_HOST];
37 static struct platform_device *cxl_swu_single[NR_CXL_SINGLE_HOST];
38 #define NR_MEM_SINGLE (NR_CXL_SINGLE_HOST * NR_CXL_SWITCH_PORTS)
39 static struct platform_device *cxl_swd_single[NR_MEM_SINGLE];
40
41 struct platform_device *cxl_mem[NR_MEM_MULTI];
42 struct platform_device *cxl_mem_single[NR_MEM_SINGLE];
43
44 static struct platform_device *cxl_rch[NR_CXL_RCH];
45 static struct platform_device *cxl_rcd[NR_CXL_RCH];
46
is_multi_bridge(struct device * dev)47 static inline bool is_multi_bridge(struct device *dev)
48 {
49 int i;
50
51 for (i = 0; i < ARRAY_SIZE(cxl_host_bridge); i++)
52 if (&cxl_host_bridge[i]->dev == dev)
53 return true;
54 return false;
55 }
56
is_single_bridge(struct device * dev)57 static inline bool is_single_bridge(struct device *dev)
58 {
59 int i;
60
61 for (i = 0; i < ARRAY_SIZE(cxl_hb_single); i++)
62 if (&cxl_hb_single[i]->dev == dev)
63 return true;
64 return false;
65 }
66
67 static struct acpi_device acpi0017_mock;
68 static struct acpi_device host_bridge[NR_BRIDGES] = {
69 [0] = {
70 .handle = &host_bridge[0],
71 },
72 [1] = {
73 .handle = &host_bridge[1],
74 },
75 [2] = {
76 .handle = &host_bridge[2],
77 },
78 [3] = {
79 .handle = &host_bridge[3],
80 },
81 };
82
is_mock_dev(struct device * dev)83 static bool is_mock_dev(struct device *dev)
84 {
85 int i;
86
87 for (i = 0; i < ARRAY_SIZE(cxl_mem); i++)
88 if (dev == &cxl_mem[i]->dev)
89 return true;
90 for (i = 0; i < ARRAY_SIZE(cxl_mem_single); i++)
91 if (dev == &cxl_mem_single[i]->dev)
92 return true;
93 for (i = 0; i < ARRAY_SIZE(cxl_rcd); i++)
94 if (dev == &cxl_rcd[i]->dev)
95 return true;
96 if (dev == &cxl_acpi->dev)
97 return true;
98 return false;
99 }
100
is_mock_adev(struct acpi_device * adev)101 static bool is_mock_adev(struct acpi_device *adev)
102 {
103 int i;
104
105 if (adev == &acpi0017_mock)
106 return true;
107
108 for (i = 0; i < ARRAY_SIZE(host_bridge); i++)
109 if (adev == &host_bridge[i])
110 return true;
111
112 return false;
113 }
114
115 static struct {
116 struct acpi_table_cedt cedt;
117 struct acpi_cedt_chbs chbs[NR_BRIDGES];
118 struct {
119 struct acpi_cedt_cfmws cfmws;
120 u32 target[1];
121 } cfmws0;
122 struct {
123 struct acpi_cedt_cfmws cfmws;
124 u32 target[2];
125 } cfmws1;
126 struct {
127 struct acpi_cedt_cfmws cfmws;
128 u32 target[1];
129 } cfmws2;
130 struct {
131 struct acpi_cedt_cfmws cfmws;
132 u32 target[2];
133 } cfmws3;
134 struct {
135 struct acpi_cedt_cfmws cfmws;
136 u32 target[1];
137 } cfmws4;
138 struct {
139 struct acpi_cedt_cfmws cfmws;
140 u32 target[1];
141 } cfmws5;
142 struct {
143 struct acpi_cedt_cfmws cfmws;
144 u32 target[1];
145 } cfmws6;
146 struct {
147 struct acpi_cedt_cfmws cfmws;
148 u32 target[2];
149 } cfmws7;
150 struct {
151 struct acpi_cedt_cfmws cfmws;
152 u32 target[4];
153 } cfmws8;
154 struct {
155 struct acpi_cedt_cxims cxims;
156 u64 xormap_list[2];
157 } cxims0;
158 } __packed mock_cedt = {
159 .cedt = {
160 .header = {
161 .signature = "CEDT",
162 .length = sizeof(mock_cedt),
163 .revision = 1,
164 },
165 },
166 .chbs[0] = {
167 .header = {
168 .type = ACPI_CEDT_TYPE_CHBS,
169 .length = sizeof(mock_cedt.chbs[0]),
170 },
171 .uid = 0,
172 .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20,
173 },
174 .chbs[1] = {
175 .header = {
176 .type = ACPI_CEDT_TYPE_CHBS,
177 .length = sizeof(mock_cedt.chbs[0]),
178 },
179 .uid = 1,
180 .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20,
181 },
182 .chbs[2] = {
183 .header = {
184 .type = ACPI_CEDT_TYPE_CHBS,
185 .length = sizeof(mock_cedt.chbs[0]),
186 },
187 .uid = 2,
188 .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL20,
189 },
190 .chbs[3] = {
191 .header = {
192 .type = ACPI_CEDT_TYPE_CHBS,
193 .length = sizeof(mock_cedt.chbs[0]),
194 },
195 .uid = 3,
196 .cxl_version = ACPI_CEDT_CHBS_VERSION_CXL11,
197 },
198 .cfmws0 = {
199 .cfmws = {
200 .header = {
201 .type = ACPI_CEDT_TYPE_CFMWS,
202 .length = sizeof(mock_cedt.cfmws0),
203 },
204 .interleave_ways = 0,
205 .granularity = 4,
206 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
207 ACPI_CEDT_CFMWS_RESTRICT_VOLATILE,
208 .qtg_id = 0,
209 .window_size = SZ_256M * 4UL,
210 },
211 .target = { 0 },
212 },
213 .cfmws1 = {
214 .cfmws = {
215 .header = {
216 .type = ACPI_CEDT_TYPE_CFMWS,
217 .length = sizeof(mock_cedt.cfmws1),
218 },
219 .interleave_ways = 1,
220 .granularity = 4,
221 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
222 ACPI_CEDT_CFMWS_RESTRICT_VOLATILE,
223 .qtg_id = 1,
224 .window_size = SZ_256M * 8UL,
225 },
226 .target = { 0, 1, },
227 },
228 .cfmws2 = {
229 .cfmws = {
230 .header = {
231 .type = ACPI_CEDT_TYPE_CFMWS,
232 .length = sizeof(mock_cedt.cfmws2),
233 },
234 .interleave_ways = 0,
235 .granularity = 4,
236 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
237 ACPI_CEDT_CFMWS_RESTRICT_PMEM,
238 .qtg_id = 2,
239 .window_size = SZ_256M * 4UL,
240 },
241 .target = { 0 },
242 },
243 .cfmws3 = {
244 .cfmws = {
245 .header = {
246 .type = ACPI_CEDT_TYPE_CFMWS,
247 .length = sizeof(mock_cedt.cfmws3),
248 },
249 .interleave_ways = 1,
250 .granularity = 4,
251 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
252 ACPI_CEDT_CFMWS_RESTRICT_PMEM,
253 .qtg_id = 3,
254 .window_size = SZ_256M * 8UL,
255 },
256 .target = { 0, 1, },
257 },
258 .cfmws4 = {
259 .cfmws = {
260 .header = {
261 .type = ACPI_CEDT_TYPE_CFMWS,
262 .length = sizeof(mock_cedt.cfmws4),
263 },
264 .interleave_ways = 0,
265 .granularity = 4,
266 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
267 ACPI_CEDT_CFMWS_RESTRICT_PMEM,
268 .qtg_id = 4,
269 .window_size = SZ_256M * 4UL,
270 },
271 .target = { 2 },
272 },
273 .cfmws5 = {
274 .cfmws = {
275 .header = {
276 .type = ACPI_CEDT_TYPE_CFMWS,
277 .length = sizeof(mock_cedt.cfmws5),
278 },
279 .interleave_ways = 0,
280 .granularity = 4,
281 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
282 ACPI_CEDT_CFMWS_RESTRICT_VOLATILE,
283 .qtg_id = 5,
284 .window_size = SZ_256M,
285 },
286 .target = { 3 },
287 },
288 /* .cfmws6,7,8 use ACPI_CEDT_CFMWS_ARITHMETIC_XOR */
289 .cfmws6 = {
290 .cfmws = {
291 .header = {
292 .type = ACPI_CEDT_TYPE_CFMWS,
293 .length = sizeof(mock_cedt.cfmws6),
294 },
295 .interleave_arithmetic = ACPI_CEDT_CFMWS_ARITHMETIC_XOR,
296 .interleave_ways = 0,
297 .granularity = 4,
298 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
299 ACPI_CEDT_CFMWS_RESTRICT_PMEM,
300 .qtg_id = 0,
301 .window_size = SZ_256M * 8UL,
302 },
303 .target = { 0, },
304 },
305 .cfmws7 = {
306 .cfmws = {
307 .header = {
308 .type = ACPI_CEDT_TYPE_CFMWS,
309 .length = sizeof(mock_cedt.cfmws7),
310 },
311 .interleave_arithmetic = ACPI_CEDT_CFMWS_ARITHMETIC_XOR,
312 .interleave_ways = 1,
313 .granularity = 0,
314 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
315 ACPI_CEDT_CFMWS_RESTRICT_PMEM,
316 .qtg_id = 1,
317 .window_size = SZ_256M * 8UL,
318 },
319 .target = { 0, 1, },
320 },
321 .cfmws8 = {
322 .cfmws = {
323 .header = {
324 .type = ACPI_CEDT_TYPE_CFMWS,
325 .length = sizeof(mock_cedt.cfmws8),
326 },
327 .interleave_arithmetic = ACPI_CEDT_CFMWS_ARITHMETIC_XOR,
328 .interleave_ways = 2,
329 .granularity = 0,
330 .restrictions = ACPI_CEDT_CFMWS_RESTRICT_TYPE3 |
331 ACPI_CEDT_CFMWS_RESTRICT_PMEM,
332 .qtg_id = 0,
333 .window_size = SZ_256M * 16UL,
334 },
335 .target = { 0, 1, 0, 1, },
336 },
337 .cxims0 = {
338 .cxims = {
339 .header = {
340 .type = ACPI_CEDT_TYPE_CXIMS,
341 .length = sizeof(mock_cedt.cxims0),
342 },
343 .hbig = 0,
344 .nr_xormaps = 2,
345 },
346 .xormap_list = { 0x404100, 0x808200, },
347 },
348 };
349
350 struct acpi_cedt_cfmws *mock_cfmws[] = {
351 [0] = &mock_cedt.cfmws0.cfmws,
352 [1] = &mock_cedt.cfmws1.cfmws,
353 [2] = &mock_cedt.cfmws2.cfmws,
354 [3] = &mock_cedt.cfmws3.cfmws,
355 [4] = &mock_cedt.cfmws4.cfmws,
356 [5] = &mock_cedt.cfmws5.cfmws,
357 /* Modulo Math above, XOR Math below */
358 [6] = &mock_cedt.cfmws6.cfmws,
359 [7] = &mock_cedt.cfmws7.cfmws,
360 [8] = &mock_cedt.cfmws8.cfmws,
361 };
362
363 static int cfmws_start;
364 static int cfmws_end;
365 #define CFMWS_MOD_ARRAY_START 0
366 #define CFMWS_MOD_ARRAY_END 5
367 #define CFMWS_XOR_ARRAY_START 6
368 #define CFMWS_XOR_ARRAY_END 8
369
370 struct acpi_cedt_cxims *mock_cxims[1] = {
371 [0] = &mock_cedt.cxims0.cxims,
372 };
373
374 struct cxl_mock_res {
375 struct list_head list;
376 struct range range;
377 };
378
379 static LIST_HEAD(mock_res);
380 static DEFINE_MUTEX(mock_res_lock);
381 static struct gen_pool *cxl_mock_pool;
382
depopulate_all_mock_resources(void)383 static void depopulate_all_mock_resources(void)
384 {
385 struct cxl_mock_res *res, *_res;
386
387 mutex_lock(&mock_res_lock);
388 list_for_each_entry_safe(res, _res, &mock_res, list) {
389 gen_pool_free(cxl_mock_pool, res->range.start,
390 range_len(&res->range));
391 list_del(&res->list);
392 kfree(res);
393 }
394 mutex_unlock(&mock_res_lock);
395 }
396
alloc_mock_res(resource_size_t size,int align)397 static struct cxl_mock_res *alloc_mock_res(resource_size_t size, int align)
398 {
399 struct cxl_mock_res *res = kzalloc(sizeof(*res), GFP_KERNEL);
400 struct genpool_data_align data = {
401 .align = align,
402 };
403 unsigned long phys;
404
405 INIT_LIST_HEAD(&res->list);
406 phys = gen_pool_alloc_algo(cxl_mock_pool, size,
407 gen_pool_first_fit_align, &data);
408 if (!phys)
409 return NULL;
410
411 res->range = (struct range) {
412 .start = phys,
413 .end = phys + size - 1,
414 };
415 mutex_lock(&mock_res_lock);
416 list_add(&res->list, &mock_res);
417 mutex_unlock(&mock_res_lock);
418
419 return res;
420 }
421
populate_cedt(void)422 static int populate_cedt(void)
423 {
424 struct cxl_mock_res *res;
425 int i;
426
427 for (i = 0; i < ARRAY_SIZE(mock_cedt.chbs); i++) {
428 struct acpi_cedt_chbs *chbs = &mock_cedt.chbs[i];
429 resource_size_t size;
430
431 if (chbs->cxl_version == ACPI_CEDT_CHBS_VERSION_CXL20)
432 size = ACPI_CEDT_CHBS_LENGTH_CXL20;
433 else
434 size = ACPI_CEDT_CHBS_LENGTH_CXL11;
435
436 res = alloc_mock_res(size, size);
437 if (!res)
438 return -ENOMEM;
439 chbs->base = res->range.start;
440 chbs->length = size;
441 }
442
443 for (i = cfmws_start; i <= cfmws_end; i++) {
444 struct acpi_cedt_cfmws *window = mock_cfmws[i];
445
446 res = alloc_mock_res(window->window_size, SZ_256M);
447 if (!res)
448 return -ENOMEM;
449 window->base_hpa = res->range.start;
450 }
451
452 return 0;
453 }
454
455 static bool is_mock_port(struct device *dev);
456
457 /*
458 * WARNING, this hack assumes the format of 'struct cxl_cfmws_context'
459 * and 'struct cxl_chbs_context' share the property that the first
460 * struct member is a cxl_test device being probed by the cxl_acpi
461 * driver.
462 */
463 struct cxl_cedt_context {
464 struct device *dev;
465 };
466
mock_acpi_table_parse_cedt(enum acpi_cedt_type id,acpi_tbl_entry_handler_arg handler_arg,void * arg)467 static int mock_acpi_table_parse_cedt(enum acpi_cedt_type id,
468 acpi_tbl_entry_handler_arg handler_arg,
469 void *arg)
470 {
471 struct cxl_cedt_context *ctx = arg;
472 struct device *dev = ctx->dev;
473 union acpi_subtable_headers *h;
474 unsigned long end;
475 int i;
476
477 if (!is_mock_port(dev) && !is_mock_dev(dev))
478 return acpi_table_parse_cedt(id, handler_arg, arg);
479
480 if (id == ACPI_CEDT_TYPE_CHBS)
481 for (i = 0; i < ARRAY_SIZE(mock_cedt.chbs); i++) {
482 h = (union acpi_subtable_headers *)&mock_cedt.chbs[i];
483 end = (unsigned long)&mock_cedt.chbs[i + 1];
484 handler_arg(h, arg, end);
485 }
486
487 if (id == ACPI_CEDT_TYPE_CFMWS)
488 for (i = cfmws_start; i <= cfmws_end; i++) {
489 h = (union acpi_subtable_headers *) mock_cfmws[i];
490 end = (unsigned long) h + mock_cfmws[i]->header.length;
491 handler_arg(h, arg, end);
492 }
493
494 if (id == ACPI_CEDT_TYPE_CXIMS)
495 for (i = 0; i < ARRAY_SIZE(mock_cxims); i++) {
496 h = (union acpi_subtable_headers *)mock_cxims[i];
497 end = (unsigned long)h + mock_cxims[i]->header.length;
498 handler_arg(h, arg, end);
499 }
500
501 return 0;
502 }
503
is_mock_bridge(struct device * dev)504 static bool is_mock_bridge(struct device *dev)
505 {
506 int i;
507
508 for (i = 0; i < ARRAY_SIZE(cxl_host_bridge); i++)
509 if (dev == &cxl_host_bridge[i]->dev)
510 return true;
511 for (i = 0; i < ARRAY_SIZE(cxl_hb_single); i++)
512 if (dev == &cxl_hb_single[i]->dev)
513 return true;
514 for (i = 0; i < ARRAY_SIZE(cxl_rch); i++)
515 if (dev == &cxl_rch[i]->dev)
516 return true;
517
518 return false;
519 }
520
is_mock_port(struct device * dev)521 static bool is_mock_port(struct device *dev)
522 {
523 int i;
524
525 if (is_mock_bridge(dev))
526 return true;
527
528 for (i = 0; i < ARRAY_SIZE(cxl_root_port); i++)
529 if (dev == &cxl_root_port[i]->dev)
530 return true;
531
532 for (i = 0; i < ARRAY_SIZE(cxl_switch_uport); i++)
533 if (dev == &cxl_switch_uport[i]->dev)
534 return true;
535
536 for (i = 0; i < ARRAY_SIZE(cxl_switch_dport); i++)
537 if (dev == &cxl_switch_dport[i]->dev)
538 return true;
539
540 for (i = 0; i < ARRAY_SIZE(cxl_root_single); i++)
541 if (dev == &cxl_root_single[i]->dev)
542 return true;
543
544 for (i = 0; i < ARRAY_SIZE(cxl_swu_single); i++)
545 if (dev == &cxl_swu_single[i]->dev)
546 return true;
547
548 for (i = 0; i < ARRAY_SIZE(cxl_swd_single); i++)
549 if (dev == &cxl_swd_single[i]->dev)
550 return true;
551
552 if (is_cxl_memdev(dev))
553 return is_mock_dev(dev->parent);
554
555 return false;
556 }
557
host_bridge_index(struct acpi_device * adev)558 static int host_bridge_index(struct acpi_device *adev)
559 {
560 return adev - host_bridge;
561 }
562
find_host_bridge(acpi_handle handle)563 static struct acpi_device *find_host_bridge(acpi_handle handle)
564 {
565 int i;
566
567 for (i = 0; i < ARRAY_SIZE(host_bridge); i++)
568 if (handle == host_bridge[i].handle)
569 return &host_bridge[i];
570 return NULL;
571 }
572
573 static acpi_status
mock_acpi_evaluate_integer(acpi_handle handle,acpi_string pathname,struct acpi_object_list * arguments,unsigned long long * data)574 mock_acpi_evaluate_integer(acpi_handle handle, acpi_string pathname,
575 struct acpi_object_list *arguments,
576 unsigned long long *data)
577 {
578 struct acpi_device *adev = find_host_bridge(handle);
579
580 if (!adev || strcmp(pathname, METHOD_NAME__UID) != 0)
581 return acpi_evaluate_integer(handle, pathname, arguments, data);
582
583 *data = host_bridge_index(adev);
584 return AE_OK;
585 }
586
587 static struct pci_bus mock_pci_bus[NR_BRIDGES];
588 static struct acpi_pci_root mock_pci_root[ARRAY_SIZE(mock_pci_bus)] = {
589 [0] = {
590 .bus = &mock_pci_bus[0],
591 },
592 [1] = {
593 .bus = &mock_pci_bus[1],
594 },
595 [2] = {
596 .bus = &mock_pci_bus[2],
597 },
598 [3] = {
599 .bus = &mock_pci_bus[3],
600 },
601
602 };
603
is_mock_bus(struct pci_bus * bus)604 static bool is_mock_bus(struct pci_bus *bus)
605 {
606 int i;
607
608 for (i = 0; i < ARRAY_SIZE(mock_pci_bus); i++)
609 if (bus == &mock_pci_bus[i])
610 return true;
611 return false;
612 }
613
mock_acpi_pci_find_root(acpi_handle handle)614 static struct acpi_pci_root *mock_acpi_pci_find_root(acpi_handle handle)
615 {
616 struct acpi_device *adev = find_host_bridge(handle);
617
618 if (!adev)
619 return acpi_pci_find_root(handle);
620 return &mock_pci_root[host_bridge_index(adev)];
621 }
622
mock_cxl_setup_hdm(struct cxl_port * port,struct cxl_endpoint_dvsec_info * info)623 static struct cxl_hdm *mock_cxl_setup_hdm(struct cxl_port *port,
624 struct cxl_endpoint_dvsec_info *info)
625 {
626 struct cxl_hdm *cxlhdm = devm_kzalloc(&port->dev, sizeof(*cxlhdm), GFP_KERNEL);
627 struct device *dev = &port->dev;
628
629 if (!cxlhdm)
630 return ERR_PTR(-ENOMEM);
631
632 cxlhdm->port = port;
633 cxlhdm->interleave_mask = ~0U;
634 cxlhdm->iw_cap_mask = ~0UL;
635 dev_set_drvdata(dev, cxlhdm);
636 return cxlhdm;
637 }
638
mock_cxl_add_passthrough_decoder(struct cxl_port * port)639 static int mock_cxl_add_passthrough_decoder(struct cxl_port *port)
640 {
641 dev_err(&port->dev, "unexpected passthrough decoder for cxl_test\n");
642 return -EOPNOTSUPP;
643 }
644
645
646 struct target_map_ctx {
647 int *target_map;
648 int index;
649 int target_count;
650 };
651
map_targets(struct device * dev,void * data)652 static int map_targets(struct device *dev, void *data)
653 {
654 struct platform_device *pdev = to_platform_device(dev);
655 struct target_map_ctx *ctx = data;
656
657 ctx->target_map[ctx->index++] = pdev->id;
658
659 if (ctx->index > ctx->target_count) {
660 dev_WARN_ONCE(dev, 1, "too many targets found?\n");
661 return -ENXIO;
662 }
663
664 return 0;
665 }
666
mock_decoder_commit(struct cxl_decoder * cxld)667 static int mock_decoder_commit(struct cxl_decoder *cxld)
668 {
669 struct cxl_port *port = to_cxl_port(cxld->dev.parent);
670 int id = cxld->id;
671
672 if (cxld->flags & CXL_DECODER_F_ENABLE)
673 return 0;
674
675 dev_dbg(&port->dev, "%s commit\n", dev_name(&cxld->dev));
676 if (cxl_num_decoders_committed(port) != id) {
677 dev_dbg(&port->dev,
678 "%s: out of order commit, expected decoder%d.%d\n",
679 dev_name(&cxld->dev), port->id,
680 cxl_num_decoders_committed(port));
681 return -EBUSY;
682 }
683
684 port->commit_end++;
685 cxld->flags |= CXL_DECODER_F_ENABLE;
686
687 return 0;
688 }
689
mock_decoder_reset(struct cxl_decoder * cxld)690 static void mock_decoder_reset(struct cxl_decoder *cxld)
691 {
692 struct cxl_port *port = to_cxl_port(cxld->dev.parent);
693 int id = cxld->id;
694
695 if ((cxld->flags & CXL_DECODER_F_ENABLE) == 0)
696 return;
697
698 dev_dbg(&port->dev, "%s reset\n", dev_name(&cxld->dev));
699 if (port->commit_end == id)
700 cxl_port_commit_reap(cxld);
701 else
702 dev_dbg(&port->dev,
703 "%s: out of order reset, expected decoder%d.%d\n",
704 dev_name(&cxld->dev), port->id, port->commit_end);
705 cxld->flags &= ~CXL_DECODER_F_ENABLE;
706 }
707
default_mock_decoder(struct cxl_decoder * cxld)708 static void default_mock_decoder(struct cxl_decoder *cxld)
709 {
710 cxld->hpa_range = (struct range){
711 .start = 0,
712 .end = -1,
713 };
714
715 cxld->interleave_ways = 1;
716 cxld->interleave_granularity = 256;
717 cxld->target_type = CXL_DECODER_HOSTONLYMEM;
718 cxld->commit = mock_decoder_commit;
719 cxld->reset = mock_decoder_reset;
720 }
721
first_decoder(struct device * dev,void * data)722 static int first_decoder(struct device *dev, void *data)
723 {
724 struct cxl_decoder *cxld;
725
726 if (!is_switch_decoder(dev))
727 return 0;
728 cxld = to_cxl_decoder(dev);
729 if (cxld->id == 0)
730 return 1;
731 return 0;
732 }
733
mock_init_hdm_decoder(struct cxl_decoder * cxld)734 static void mock_init_hdm_decoder(struct cxl_decoder *cxld)
735 {
736 struct acpi_cedt_cfmws *window = mock_cfmws[0];
737 struct platform_device *pdev = NULL;
738 struct cxl_endpoint_decoder *cxled;
739 struct cxl_switch_decoder *cxlsd;
740 struct cxl_port *port, *iter;
741 const int size = SZ_512M;
742 struct cxl_memdev *cxlmd;
743 struct cxl_dport *dport;
744 struct device *dev;
745 bool hb0 = false;
746 u64 base;
747 int i;
748
749 if (is_endpoint_decoder(&cxld->dev)) {
750 cxled = to_cxl_endpoint_decoder(&cxld->dev);
751 cxlmd = cxled_to_memdev(cxled);
752 WARN_ON(!dev_is_platform(cxlmd->dev.parent));
753 pdev = to_platform_device(cxlmd->dev.parent);
754
755 /* check is endpoint is attach to host-bridge0 */
756 port = cxled_to_port(cxled);
757 do {
758 if (port->uport_dev == &cxl_host_bridge[0]->dev) {
759 hb0 = true;
760 break;
761 }
762 if (is_cxl_port(port->dev.parent))
763 port = to_cxl_port(port->dev.parent);
764 else
765 port = NULL;
766 } while (port);
767 port = cxled_to_port(cxled);
768 }
769
770 /*
771 * The first decoder on the first 2 devices on the first switch
772 * attached to host-bridge0 mock a fake / static RAM region. All
773 * other decoders are default disabled. Given the round robin
774 * assignment those devices are named cxl_mem.0, and cxl_mem.4.
775 *
776 * See 'cxl list -BMPu -m cxl_mem.0,cxl_mem.4'
777 */
778 if (!hb0 || pdev->id % 4 || pdev->id > 4 || cxld->id > 0) {
779 default_mock_decoder(cxld);
780 return;
781 }
782
783 base = window->base_hpa;
784 cxld->hpa_range = (struct range) {
785 .start = base,
786 .end = base + size - 1,
787 };
788
789 cxld->interleave_ways = 2;
790 eig_to_granularity(window->granularity, &cxld->interleave_granularity);
791 cxld->target_type = CXL_DECODER_HOSTONLYMEM;
792 cxld->flags = CXL_DECODER_F_ENABLE;
793 cxled->state = CXL_DECODER_STATE_AUTO;
794 port->commit_end = cxld->id;
795 devm_cxl_dpa_reserve(cxled, 0, size / cxld->interleave_ways, 0);
796 cxld->commit = mock_decoder_commit;
797 cxld->reset = mock_decoder_reset;
798
799 /*
800 * Now that endpoint decoder is set up, walk up the hierarchy
801 * and setup the switch and root port decoders targeting @cxlmd.
802 */
803 iter = port;
804 for (i = 0; i < 2; i++) {
805 dport = iter->parent_dport;
806 iter = dport->port;
807 dev = device_find_child(&iter->dev, NULL, first_decoder);
808 /*
809 * Ancestor ports are guaranteed to be enumerated before
810 * @port, and all ports have at least one decoder.
811 */
812 if (WARN_ON(!dev))
813 continue;
814 cxlsd = to_cxl_switch_decoder(dev);
815 if (i == 0) {
816 /* put cxl_mem.4 second in the decode order */
817 if (pdev->id == 4)
818 cxlsd->target[1] = dport;
819 else
820 cxlsd->target[0] = dport;
821 } else
822 cxlsd->target[0] = dport;
823 cxld = &cxlsd->cxld;
824 cxld->target_type = CXL_DECODER_HOSTONLYMEM;
825 cxld->flags = CXL_DECODER_F_ENABLE;
826 iter->commit_end = 0;
827 /*
828 * Switch targets 2 endpoints, while host bridge targets
829 * one root port
830 */
831 if (i == 0)
832 cxld->interleave_ways = 2;
833 else
834 cxld->interleave_ways = 1;
835 cxld->interleave_granularity = 4096;
836 cxld->hpa_range = (struct range) {
837 .start = base,
838 .end = base + size - 1,
839 };
840 put_device(dev);
841 }
842 }
843
mock_cxl_enumerate_decoders(struct cxl_hdm * cxlhdm,struct cxl_endpoint_dvsec_info * info)844 static int mock_cxl_enumerate_decoders(struct cxl_hdm *cxlhdm,
845 struct cxl_endpoint_dvsec_info *info)
846 {
847 struct cxl_port *port = cxlhdm->port;
848 struct cxl_port *parent_port = to_cxl_port(port->dev.parent);
849 int target_count, i;
850
851 if (is_cxl_endpoint(port))
852 target_count = 0;
853 else if (is_cxl_root(parent_port))
854 target_count = NR_CXL_ROOT_PORTS;
855 else
856 target_count = NR_CXL_SWITCH_PORTS;
857
858 for (i = 0; i < NR_CXL_PORT_DECODERS; i++) {
859 int target_map[CXL_DECODER_MAX_INTERLEAVE] = { 0 };
860 struct target_map_ctx ctx = {
861 .target_map = target_map,
862 .target_count = target_count,
863 };
864 struct cxl_decoder *cxld;
865 int rc;
866
867 if (target_count) {
868 struct cxl_switch_decoder *cxlsd;
869
870 cxlsd = cxl_switch_decoder_alloc(port, target_count);
871 if (IS_ERR(cxlsd)) {
872 dev_warn(&port->dev,
873 "Failed to allocate the decoder\n");
874 return PTR_ERR(cxlsd);
875 }
876 cxld = &cxlsd->cxld;
877 } else {
878 struct cxl_endpoint_decoder *cxled;
879
880 cxled = cxl_endpoint_decoder_alloc(port);
881
882 if (IS_ERR(cxled)) {
883 dev_warn(&port->dev,
884 "Failed to allocate the decoder\n");
885 return PTR_ERR(cxled);
886 }
887 cxld = &cxled->cxld;
888 }
889
890 mock_init_hdm_decoder(cxld);
891
892 if (target_count) {
893 rc = device_for_each_child(port->uport_dev, &ctx,
894 map_targets);
895 if (rc) {
896 put_device(&cxld->dev);
897 return rc;
898 }
899 }
900
901 rc = cxl_decoder_add_locked(cxld, target_map);
902 if (rc) {
903 put_device(&cxld->dev);
904 dev_err(&port->dev, "Failed to add decoder\n");
905 return rc;
906 }
907
908 rc = cxl_decoder_autoremove(&port->dev, cxld);
909 if (rc)
910 return rc;
911 dev_dbg(&cxld->dev, "Added to port %s\n", dev_name(&port->dev));
912 }
913
914 return 0;
915 }
916
mock_cxl_port_enumerate_dports(struct cxl_port * port)917 static int mock_cxl_port_enumerate_dports(struct cxl_port *port)
918 {
919 struct platform_device **array;
920 int i, array_size;
921
922 if (port->depth == 1) {
923 if (is_multi_bridge(port->uport_dev)) {
924 array_size = ARRAY_SIZE(cxl_root_port);
925 array = cxl_root_port;
926 } else if (is_single_bridge(port->uport_dev)) {
927 array_size = ARRAY_SIZE(cxl_root_single);
928 array = cxl_root_single;
929 } else {
930 dev_dbg(&port->dev, "%s: unknown bridge type\n",
931 dev_name(port->uport_dev));
932 return -ENXIO;
933 }
934 } else if (port->depth == 2) {
935 struct cxl_port *parent = to_cxl_port(port->dev.parent);
936
937 if (is_multi_bridge(parent->uport_dev)) {
938 array_size = ARRAY_SIZE(cxl_switch_dport);
939 array = cxl_switch_dport;
940 } else if (is_single_bridge(parent->uport_dev)) {
941 array_size = ARRAY_SIZE(cxl_swd_single);
942 array = cxl_swd_single;
943 } else {
944 dev_dbg(&port->dev, "%s: unknown bridge type\n",
945 dev_name(port->uport_dev));
946 return -ENXIO;
947 }
948 } else {
949 dev_WARN_ONCE(&port->dev, 1, "unexpected depth %d\n",
950 port->depth);
951 return -ENXIO;
952 }
953
954 for (i = 0; i < array_size; i++) {
955 struct platform_device *pdev = array[i];
956 struct cxl_dport *dport;
957
958 if (pdev->dev.parent != port->uport_dev) {
959 dev_dbg(&port->dev, "%s: mismatch parent %s\n",
960 dev_name(port->uport_dev),
961 dev_name(pdev->dev.parent));
962 continue;
963 }
964
965 dport = devm_cxl_add_dport(port, &pdev->dev, pdev->id,
966 CXL_RESOURCE_NONE);
967
968 if (IS_ERR(dport))
969 return PTR_ERR(dport);
970 }
971
972 return 0;
973 }
974
975 static struct cxl_mock_ops cxl_mock_ops = {
976 .is_mock_adev = is_mock_adev,
977 .is_mock_bridge = is_mock_bridge,
978 .is_mock_bus = is_mock_bus,
979 .is_mock_port = is_mock_port,
980 .is_mock_dev = is_mock_dev,
981 .acpi_table_parse_cedt = mock_acpi_table_parse_cedt,
982 .acpi_evaluate_integer = mock_acpi_evaluate_integer,
983 .acpi_pci_find_root = mock_acpi_pci_find_root,
984 .devm_cxl_port_enumerate_dports = mock_cxl_port_enumerate_dports,
985 .devm_cxl_setup_hdm = mock_cxl_setup_hdm,
986 .devm_cxl_add_passthrough_decoder = mock_cxl_add_passthrough_decoder,
987 .devm_cxl_enumerate_decoders = mock_cxl_enumerate_decoders,
988 .list = LIST_HEAD_INIT(cxl_mock_ops.list),
989 };
990
mock_companion(struct acpi_device * adev,struct device * dev)991 static void mock_companion(struct acpi_device *adev, struct device *dev)
992 {
993 device_initialize(&adev->dev);
994 fwnode_init(&adev->fwnode, NULL);
995 dev->fwnode = &adev->fwnode;
996 adev->fwnode.dev = dev;
997 }
998
999 #ifndef SZ_64G
1000 #define SZ_64G (SZ_32G * 2)
1001 #endif
1002
cxl_rch_init(void)1003 static __init int cxl_rch_init(void)
1004 {
1005 int rc, i;
1006
1007 for (i = 0; i < ARRAY_SIZE(cxl_rch); i++) {
1008 int idx = NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST + i;
1009 struct acpi_device *adev = &host_bridge[idx];
1010 struct platform_device *pdev;
1011
1012 pdev = platform_device_alloc("cxl_host_bridge", idx);
1013 if (!pdev)
1014 goto err_bridge;
1015
1016 mock_companion(adev, &pdev->dev);
1017 rc = platform_device_add(pdev);
1018 if (rc) {
1019 platform_device_put(pdev);
1020 goto err_bridge;
1021 }
1022
1023 cxl_rch[i] = pdev;
1024 mock_pci_bus[idx].bridge = &pdev->dev;
1025 rc = sysfs_create_link(&pdev->dev.kobj, &pdev->dev.kobj,
1026 "firmware_node");
1027 if (rc)
1028 goto err_bridge;
1029 }
1030
1031 for (i = 0; i < ARRAY_SIZE(cxl_rcd); i++) {
1032 int idx = NR_MEM_MULTI + NR_MEM_SINGLE + i;
1033 struct platform_device *rch = cxl_rch[i];
1034 struct platform_device *pdev;
1035
1036 pdev = platform_device_alloc("cxl_rcd", idx);
1037 if (!pdev)
1038 goto err_mem;
1039 pdev->dev.parent = &rch->dev;
1040 set_dev_node(&pdev->dev, i % 2);
1041
1042 rc = platform_device_add(pdev);
1043 if (rc) {
1044 platform_device_put(pdev);
1045 goto err_mem;
1046 }
1047 cxl_rcd[i] = pdev;
1048 }
1049
1050 return 0;
1051
1052 err_mem:
1053 for (i = ARRAY_SIZE(cxl_rcd) - 1; i >= 0; i--)
1054 platform_device_unregister(cxl_rcd[i]);
1055 err_bridge:
1056 for (i = ARRAY_SIZE(cxl_rch) - 1; i >= 0; i--) {
1057 struct platform_device *pdev = cxl_rch[i];
1058
1059 if (!pdev)
1060 continue;
1061 sysfs_remove_link(&pdev->dev.kobj, "firmware_node");
1062 platform_device_unregister(cxl_rch[i]);
1063 }
1064
1065 return rc;
1066 }
1067
cxl_rch_exit(void)1068 static void cxl_rch_exit(void)
1069 {
1070 int i;
1071
1072 for (i = ARRAY_SIZE(cxl_rcd) - 1; i >= 0; i--)
1073 platform_device_unregister(cxl_rcd[i]);
1074 for (i = ARRAY_SIZE(cxl_rch) - 1; i >= 0; i--) {
1075 struct platform_device *pdev = cxl_rch[i];
1076
1077 if (!pdev)
1078 continue;
1079 sysfs_remove_link(&pdev->dev.kobj, "firmware_node");
1080 platform_device_unregister(cxl_rch[i]);
1081 }
1082 }
1083
cxl_single_init(void)1084 static __init int cxl_single_init(void)
1085 {
1086 int i, rc;
1087
1088 for (i = 0; i < ARRAY_SIZE(cxl_hb_single); i++) {
1089 struct acpi_device *adev =
1090 &host_bridge[NR_CXL_HOST_BRIDGES + i];
1091 struct platform_device *pdev;
1092
1093 pdev = platform_device_alloc("cxl_host_bridge",
1094 NR_CXL_HOST_BRIDGES + i);
1095 if (!pdev)
1096 goto err_bridge;
1097
1098 mock_companion(adev, &pdev->dev);
1099 rc = platform_device_add(pdev);
1100 if (rc) {
1101 platform_device_put(pdev);
1102 goto err_bridge;
1103 }
1104
1105 cxl_hb_single[i] = pdev;
1106 mock_pci_bus[i + NR_CXL_HOST_BRIDGES].bridge = &pdev->dev;
1107 rc = sysfs_create_link(&pdev->dev.kobj, &pdev->dev.kobj,
1108 "physical_node");
1109 if (rc)
1110 goto err_bridge;
1111 }
1112
1113 for (i = 0; i < ARRAY_SIZE(cxl_root_single); i++) {
1114 struct platform_device *bridge =
1115 cxl_hb_single[i % ARRAY_SIZE(cxl_hb_single)];
1116 struct platform_device *pdev;
1117
1118 pdev = platform_device_alloc("cxl_root_port",
1119 NR_MULTI_ROOT + i);
1120 if (!pdev)
1121 goto err_port;
1122 pdev->dev.parent = &bridge->dev;
1123
1124 rc = platform_device_add(pdev);
1125 if (rc) {
1126 platform_device_put(pdev);
1127 goto err_port;
1128 }
1129 cxl_root_single[i] = pdev;
1130 }
1131
1132 for (i = 0; i < ARRAY_SIZE(cxl_swu_single); i++) {
1133 struct platform_device *root_port = cxl_root_single[i];
1134 struct platform_device *pdev;
1135
1136 pdev = platform_device_alloc("cxl_switch_uport",
1137 NR_MULTI_ROOT + i);
1138 if (!pdev)
1139 goto err_uport;
1140 pdev->dev.parent = &root_port->dev;
1141
1142 rc = platform_device_add(pdev);
1143 if (rc) {
1144 platform_device_put(pdev);
1145 goto err_uport;
1146 }
1147 cxl_swu_single[i] = pdev;
1148 }
1149
1150 for (i = 0; i < ARRAY_SIZE(cxl_swd_single); i++) {
1151 struct platform_device *uport =
1152 cxl_swu_single[i % ARRAY_SIZE(cxl_swu_single)];
1153 struct platform_device *pdev;
1154
1155 pdev = platform_device_alloc("cxl_switch_dport",
1156 i + NR_MEM_MULTI);
1157 if (!pdev)
1158 goto err_dport;
1159 pdev->dev.parent = &uport->dev;
1160
1161 rc = platform_device_add(pdev);
1162 if (rc) {
1163 platform_device_put(pdev);
1164 goto err_dport;
1165 }
1166 cxl_swd_single[i] = pdev;
1167 }
1168
1169 for (i = 0; i < ARRAY_SIZE(cxl_mem_single); i++) {
1170 struct platform_device *dport = cxl_swd_single[i];
1171 struct platform_device *pdev;
1172
1173 pdev = platform_device_alloc("cxl_mem", NR_MEM_MULTI + i);
1174 if (!pdev)
1175 goto err_mem;
1176 pdev->dev.parent = &dport->dev;
1177 set_dev_node(&pdev->dev, i % 2);
1178
1179 rc = platform_device_add(pdev);
1180 if (rc) {
1181 platform_device_put(pdev);
1182 goto err_mem;
1183 }
1184 cxl_mem_single[i] = pdev;
1185 }
1186
1187 return 0;
1188
1189 err_mem:
1190 for (i = ARRAY_SIZE(cxl_mem_single) - 1; i >= 0; i--)
1191 platform_device_unregister(cxl_mem_single[i]);
1192 err_dport:
1193 for (i = ARRAY_SIZE(cxl_swd_single) - 1; i >= 0; i--)
1194 platform_device_unregister(cxl_swd_single[i]);
1195 err_uport:
1196 for (i = ARRAY_SIZE(cxl_swu_single) - 1; i >= 0; i--)
1197 platform_device_unregister(cxl_swu_single[i]);
1198 err_port:
1199 for (i = ARRAY_SIZE(cxl_root_single) - 1; i >= 0; i--)
1200 platform_device_unregister(cxl_root_single[i]);
1201 err_bridge:
1202 for (i = ARRAY_SIZE(cxl_hb_single) - 1; i >= 0; i--) {
1203 struct platform_device *pdev = cxl_hb_single[i];
1204
1205 if (!pdev)
1206 continue;
1207 sysfs_remove_link(&pdev->dev.kobj, "physical_node");
1208 platform_device_unregister(cxl_hb_single[i]);
1209 }
1210
1211 return rc;
1212 }
1213
cxl_single_exit(void)1214 static void cxl_single_exit(void)
1215 {
1216 int i;
1217
1218 for (i = ARRAY_SIZE(cxl_mem_single) - 1; i >= 0; i--)
1219 platform_device_unregister(cxl_mem_single[i]);
1220 for (i = ARRAY_SIZE(cxl_swd_single) - 1; i >= 0; i--)
1221 platform_device_unregister(cxl_swd_single[i]);
1222 for (i = ARRAY_SIZE(cxl_swu_single) - 1; i >= 0; i--)
1223 platform_device_unregister(cxl_swu_single[i]);
1224 for (i = ARRAY_SIZE(cxl_root_single) - 1; i >= 0; i--)
1225 platform_device_unregister(cxl_root_single[i]);
1226 for (i = ARRAY_SIZE(cxl_hb_single) - 1; i >= 0; i--) {
1227 struct platform_device *pdev = cxl_hb_single[i];
1228
1229 if (!pdev)
1230 continue;
1231 sysfs_remove_link(&pdev->dev.kobj, "physical_node");
1232 platform_device_unregister(cxl_hb_single[i]);
1233 }
1234 }
1235
cxl_test_init(void)1236 static __init int cxl_test_init(void)
1237 {
1238 int rc, i;
1239
1240 cxl_acpi_test();
1241 cxl_core_test();
1242 cxl_mem_test();
1243 cxl_pmem_test();
1244 cxl_port_test();
1245
1246 register_cxl_mock_ops(&cxl_mock_ops);
1247
1248 cxl_mock_pool = gen_pool_create(ilog2(SZ_2M), NUMA_NO_NODE);
1249 if (!cxl_mock_pool) {
1250 rc = -ENOMEM;
1251 goto err_gen_pool_create;
1252 }
1253
1254 rc = gen_pool_add(cxl_mock_pool, iomem_resource.end + 1 - SZ_64G,
1255 SZ_64G, NUMA_NO_NODE);
1256 if (rc)
1257 goto err_gen_pool_add;
1258
1259 if (interleave_arithmetic == 1) {
1260 cfmws_start = CFMWS_XOR_ARRAY_START;
1261 cfmws_end = CFMWS_XOR_ARRAY_END;
1262 } else {
1263 cfmws_start = CFMWS_MOD_ARRAY_START;
1264 cfmws_end = CFMWS_MOD_ARRAY_END;
1265 }
1266
1267 rc = populate_cedt();
1268 if (rc)
1269 goto err_populate;
1270
1271 for (i = 0; i < ARRAY_SIZE(cxl_host_bridge); i++) {
1272 struct acpi_device *adev = &host_bridge[i];
1273 struct platform_device *pdev;
1274
1275 pdev = platform_device_alloc("cxl_host_bridge", i);
1276 if (!pdev)
1277 goto err_bridge;
1278
1279 mock_companion(adev, &pdev->dev);
1280 rc = platform_device_add(pdev);
1281 if (rc) {
1282 platform_device_put(pdev);
1283 goto err_bridge;
1284 }
1285
1286 cxl_host_bridge[i] = pdev;
1287 mock_pci_bus[i].bridge = &pdev->dev;
1288 rc = sysfs_create_link(&pdev->dev.kobj, &pdev->dev.kobj,
1289 "physical_node");
1290 if (rc)
1291 goto err_bridge;
1292 }
1293
1294 for (i = 0; i < ARRAY_SIZE(cxl_root_port); i++) {
1295 struct platform_device *bridge =
1296 cxl_host_bridge[i % ARRAY_SIZE(cxl_host_bridge)];
1297 struct platform_device *pdev;
1298
1299 pdev = platform_device_alloc("cxl_root_port", i);
1300 if (!pdev)
1301 goto err_port;
1302 pdev->dev.parent = &bridge->dev;
1303
1304 rc = platform_device_add(pdev);
1305 if (rc) {
1306 platform_device_put(pdev);
1307 goto err_port;
1308 }
1309 cxl_root_port[i] = pdev;
1310 }
1311
1312 BUILD_BUG_ON(ARRAY_SIZE(cxl_switch_uport) != ARRAY_SIZE(cxl_root_port));
1313 for (i = 0; i < ARRAY_SIZE(cxl_switch_uport); i++) {
1314 struct platform_device *root_port = cxl_root_port[i];
1315 struct platform_device *pdev;
1316
1317 pdev = platform_device_alloc("cxl_switch_uport", i);
1318 if (!pdev)
1319 goto err_uport;
1320 pdev->dev.parent = &root_port->dev;
1321
1322 rc = platform_device_add(pdev);
1323 if (rc) {
1324 platform_device_put(pdev);
1325 goto err_uport;
1326 }
1327 cxl_switch_uport[i] = pdev;
1328 }
1329
1330 for (i = 0; i < ARRAY_SIZE(cxl_switch_dport); i++) {
1331 struct platform_device *uport =
1332 cxl_switch_uport[i % ARRAY_SIZE(cxl_switch_uport)];
1333 struct platform_device *pdev;
1334
1335 pdev = platform_device_alloc("cxl_switch_dport", i);
1336 if (!pdev)
1337 goto err_dport;
1338 pdev->dev.parent = &uport->dev;
1339
1340 rc = platform_device_add(pdev);
1341 if (rc) {
1342 platform_device_put(pdev);
1343 goto err_dport;
1344 }
1345 cxl_switch_dport[i] = pdev;
1346 }
1347
1348 for (i = 0; i < ARRAY_SIZE(cxl_mem); i++) {
1349 struct platform_device *dport = cxl_switch_dport[i];
1350 struct platform_device *pdev;
1351
1352 pdev = platform_device_alloc("cxl_mem", i);
1353 if (!pdev)
1354 goto err_mem;
1355 pdev->dev.parent = &dport->dev;
1356 set_dev_node(&pdev->dev, i % 2);
1357
1358 rc = platform_device_add(pdev);
1359 if (rc) {
1360 platform_device_put(pdev);
1361 goto err_mem;
1362 }
1363 cxl_mem[i] = pdev;
1364 }
1365
1366 rc = cxl_single_init();
1367 if (rc)
1368 goto err_mem;
1369
1370 rc = cxl_rch_init();
1371 if (rc)
1372 goto err_single;
1373
1374 cxl_acpi = platform_device_alloc("cxl_acpi", 0);
1375 if (!cxl_acpi)
1376 goto err_rch;
1377
1378 mock_companion(&acpi0017_mock, &cxl_acpi->dev);
1379 acpi0017_mock.dev.bus = &platform_bus_type;
1380
1381 rc = platform_device_add(cxl_acpi);
1382 if (rc)
1383 goto err_add;
1384
1385 return 0;
1386
1387 err_add:
1388 platform_device_put(cxl_acpi);
1389 err_rch:
1390 cxl_rch_exit();
1391 err_single:
1392 cxl_single_exit();
1393 err_mem:
1394 for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--)
1395 platform_device_unregister(cxl_mem[i]);
1396 err_dport:
1397 for (i = ARRAY_SIZE(cxl_switch_dport) - 1; i >= 0; i--)
1398 platform_device_unregister(cxl_switch_dport[i]);
1399 err_uport:
1400 for (i = ARRAY_SIZE(cxl_switch_uport) - 1; i >= 0; i--)
1401 platform_device_unregister(cxl_switch_uport[i]);
1402 err_port:
1403 for (i = ARRAY_SIZE(cxl_root_port) - 1; i >= 0; i--)
1404 platform_device_unregister(cxl_root_port[i]);
1405 err_bridge:
1406 for (i = ARRAY_SIZE(cxl_host_bridge) - 1; i >= 0; i--) {
1407 struct platform_device *pdev = cxl_host_bridge[i];
1408
1409 if (!pdev)
1410 continue;
1411 sysfs_remove_link(&pdev->dev.kobj, "physical_node");
1412 platform_device_unregister(cxl_host_bridge[i]);
1413 }
1414 err_populate:
1415 depopulate_all_mock_resources();
1416 err_gen_pool_add:
1417 gen_pool_destroy(cxl_mock_pool);
1418 err_gen_pool_create:
1419 unregister_cxl_mock_ops(&cxl_mock_ops);
1420 return rc;
1421 }
1422
cxl_test_exit(void)1423 static __exit void cxl_test_exit(void)
1424 {
1425 int i;
1426
1427 platform_device_unregister(cxl_acpi);
1428 cxl_rch_exit();
1429 cxl_single_exit();
1430 for (i = ARRAY_SIZE(cxl_mem) - 1; i >= 0; i--)
1431 platform_device_unregister(cxl_mem[i]);
1432 for (i = ARRAY_SIZE(cxl_switch_dport) - 1; i >= 0; i--)
1433 platform_device_unregister(cxl_switch_dport[i]);
1434 for (i = ARRAY_SIZE(cxl_switch_uport) - 1; i >= 0; i--)
1435 platform_device_unregister(cxl_switch_uport[i]);
1436 for (i = ARRAY_SIZE(cxl_root_port) - 1; i >= 0; i--)
1437 platform_device_unregister(cxl_root_port[i]);
1438 for (i = ARRAY_SIZE(cxl_host_bridge) - 1; i >= 0; i--) {
1439 struct platform_device *pdev = cxl_host_bridge[i];
1440
1441 if (!pdev)
1442 continue;
1443 sysfs_remove_link(&pdev->dev.kobj, "physical_node");
1444 platform_device_unregister(cxl_host_bridge[i]);
1445 }
1446 depopulate_all_mock_resources();
1447 gen_pool_destroy(cxl_mock_pool);
1448 unregister_cxl_mock_ops(&cxl_mock_ops);
1449 }
1450
1451 module_param(interleave_arithmetic, int, 0444);
1452 MODULE_PARM_DESC(interleave_arithmetic, "Modulo:0, XOR:1");
1453 module_init(cxl_test_init);
1454 module_exit(cxl_test_exit);
1455 MODULE_LICENSE("GPL v2");
1456 MODULE_IMPORT_NS(ACPI);
1457 MODULE_IMPORT_NS(CXL);
1458