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1/*
2 * Copyright 2014 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22
23#include <linux/types.h>
24#include <linux/kernel.h>
25#include <linux/pci.h>
26#include <linux/errno.h>
27#include <linux/acpi.h>
28#include <linux/hash.h>
29#include <linux/cpufreq.h>
30#include <linux/log2.h>
31
32#include "kfd_priv.h"
33#include "kfd_crat.h"
34#include "kfd_topology.h"
35
36static struct list_head topology_device_list;
37static int topology_crat_parsed;
38static struct kfd_system_properties sys_props;
39
40static DECLARE_RWSEM(topology_lock);
41
42struct kfd_dev *kfd_device_by_id(uint32_t gpu_id)
43{
44 struct kfd_topology_device *top_dev;
45 struct kfd_dev *device = NULL;
46
47 down_read(&topology_lock);
48
49 list_for_each_entry(top_dev, &topology_device_list, list)
50 if (top_dev->gpu_id == gpu_id) {
51 device = top_dev->gpu;
52 break;
53 }
54
55 up_read(&topology_lock);
56
57 return device;
58}
59
60struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
61{
62 struct kfd_topology_device *top_dev;
63 struct kfd_dev *device = NULL;
64
65 down_read(&topology_lock);
66
67 list_for_each_entry(top_dev, &topology_device_list, list)
68 if (top_dev->gpu->pdev == pdev) {
69 device = top_dev->gpu;
70 break;
71 }
72
73 up_read(&topology_lock);
74
75 return device;
76}
77
78static int kfd_topology_get_crat_acpi(void *crat_image, size_t *size)
79{
80 struct acpi_table_header *crat_table;
81 acpi_status status;
82
83 if (!size)
84 return -EINVAL;
85
86 /*
87 * Fetch the CRAT table from ACPI
88 */
89 status = acpi_get_table(CRAT_SIGNATURE, 0, &crat_table);
90 if (status == AE_NOT_FOUND) {
91 pr_warn("CRAT table not found\n");
92 return -ENODATA;
93 } else if (ACPI_FAILURE(status)) {
94 const char *err = acpi_format_exception(status);
95
96 pr_err("CRAT table error: %s\n", err);
97 return -EINVAL;
98 }
99
100 if (*size >= crat_table->length && crat_image != NULL)
101 memcpy(crat_image, crat_table, crat_table->length);
102
103 *size = crat_table->length;
104
105 return 0;
106}
107
108static void kfd_populated_cu_info_cpu(struct kfd_topology_device *dev,
109 struct crat_subtype_computeunit *cu)
110{
111 BUG_ON(!dev);
112 BUG_ON(!cu);
113
114 dev->node_props.cpu_cores_count = cu->num_cpu_cores;
115 dev->node_props.cpu_core_id_base = cu->processor_id_low;
116 if (cu->hsa_capability & CRAT_CU_FLAGS_IOMMU_PRESENT)
117 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
118
119 pr_info("CU CPU: cores=%d id_base=%d\n", cu->num_cpu_cores,
120 cu->processor_id_low);
121}
122
123static void kfd_populated_cu_info_gpu(struct kfd_topology_device *dev,
124 struct crat_subtype_computeunit *cu)
125{
126 BUG_ON(!dev);
127 BUG_ON(!cu);
128
129 dev->node_props.simd_id_base = cu->processor_id_low;
130 dev->node_props.simd_count = cu->num_simd_cores;
131 dev->node_props.lds_size_in_kb = cu->lds_size_in_kb;
132 dev->node_props.max_waves_per_simd = cu->max_waves_simd;
133 dev->node_props.wave_front_size = cu->wave_front_size;
134 dev->node_props.mem_banks_count = cu->num_banks;
135 dev->node_props.array_count = cu->num_arrays;
136 dev->node_props.cu_per_simd_array = cu->num_cu_per_array;
137 dev->node_props.simd_per_cu = cu->num_simd_per_cu;
138 dev->node_props.max_slots_scratch_cu = cu->max_slots_scatch_cu;
139 if (cu->hsa_capability & CRAT_CU_FLAGS_HOT_PLUGGABLE)
140 dev->node_props.capability |= HSA_CAP_HOT_PLUGGABLE;
141 pr_info("CU GPU: simds=%d id_base=%d\n", cu->num_simd_cores,
142 cu->processor_id_low);
143}
144
145/* kfd_parse_subtype_cu is called when the topology mutex is already acquired */
146static int kfd_parse_subtype_cu(struct crat_subtype_computeunit *cu)
147{
148 struct kfd_topology_device *dev;
149 int i = 0;
150
151 BUG_ON(!cu);
152
153 pr_info("Found CU entry in CRAT table with proximity_domain=%d caps=%x\n",
154 cu->proximity_domain, cu->hsa_capability);
155 list_for_each_entry(dev, &topology_device_list, list) {
156 if (cu->proximity_domain == i) {
157 if (cu->flags & CRAT_CU_FLAGS_CPU_PRESENT)
158 kfd_populated_cu_info_cpu(dev, cu);
159
160 if (cu->flags & CRAT_CU_FLAGS_GPU_PRESENT)
161 kfd_populated_cu_info_gpu(dev, cu);
162 break;
163 }
164 i++;
165 }
166
167 return 0;
168}
169
170/*
171 * kfd_parse_subtype_mem is called when the topology mutex is
172 * already acquired
173 */
174static int kfd_parse_subtype_mem(struct crat_subtype_memory *mem)
175{
176 struct kfd_mem_properties *props;
177 struct kfd_topology_device *dev;
178 int i = 0;
179
180 BUG_ON(!mem);
181
182 pr_info("Found memory entry in CRAT table with proximity_domain=%d\n",
183 mem->promixity_domain);
184 list_for_each_entry(dev, &topology_device_list, list) {
185 if (mem->promixity_domain == i) {
186 props = kfd_alloc_struct(props);
187 if (props == NULL)
188 return -ENOMEM;
189
190 if (dev->node_props.cpu_cores_count == 0)
191 props->heap_type = HSA_MEM_HEAP_TYPE_FB_PRIVATE;
192 else
193 props->heap_type = HSA_MEM_HEAP_TYPE_SYSTEM;
194
195 if (mem->flags & CRAT_MEM_FLAGS_HOT_PLUGGABLE)
196 props->flags |= HSA_MEM_FLAGS_HOT_PLUGGABLE;
197 if (mem->flags & CRAT_MEM_FLAGS_NON_VOLATILE)
198 props->flags |= HSA_MEM_FLAGS_NON_VOLATILE;
199
200 props->size_in_bytes =
201 ((uint64_t)mem->length_high << 32) +
202 mem->length_low;
203 props->width = mem->width;
204
205 dev->mem_bank_count++;
206 list_add_tail(&props->list, &dev->mem_props);
207
208 break;
209 }
210 i++;
211 }
212
213 return 0;
214}
215
216/*
217 * kfd_parse_subtype_cache is called when the topology mutex
218 * is already acquired
219 */
220static int kfd_parse_subtype_cache(struct crat_subtype_cache *cache)
221{
222 struct kfd_cache_properties *props;
223 struct kfd_topology_device *dev;
224 uint32_t id;
225
226 BUG_ON(!cache);
227
228 id = cache->processor_id_low;
229
230 pr_info("Found cache entry in CRAT table with processor_id=%d\n", id);
231 list_for_each_entry(dev, &topology_device_list, list)
232 if (id == dev->node_props.cpu_core_id_base ||
233 id == dev->node_props.simd_id_base) {
234 props = kfd_alloc_struct(props);
235 if (props == NULL)
236 return -ENOMEM;
237
238 props->processor_id_low = id;
239 props->cache_level = cache->cache_level;
240 props->cache_size = cache->cache_size;
241 props->cacheline_size = cache->cache_line_size;
242 props->cachelines_per_tag = cache->lines_per_tag;
243 props->cache_assoc = cache->associativity;
244 props->cache_latency = cache->cache_latency;
245
246 if (cache->flags & CRAT_CACHE_FLAGS_DATA_CACHE)
247 props->cache_type |= HSA_CACHE_TYPE_DATA;
248 if (cache->flags & CRAT_CACHE_FLAGS_INST_CACHE)
249 props->cache_type |= HSA_CACHE_TYPE_INSTRUCTION;
250 if (cache->flags & CRAT_CACHE_FLAGS_CPU_CACHE)
251 props->cache_type |= HSA_CACHE_TYPE_CPU;
252 if (cache->flags & CRAT_CACHE_FLAGS_SIMD_CACHE)
253 props->cache_type |= HSA_CACHE_TYPE_HSACU;
254
255 dev->cache_count++;
256 dev->node_props.caches_count++;
257 list_add_tail(&props->list, &dev->cache_props);
258
259 break;
260 }
261
262 return 0;
263}
264
265/*
266 * kfd_parse_subtype_iolink is called when the topology mutex
267 * is already acquired
268 */
269static int kfd_parse_subtype_iolink(struct crat_subtype_iolink *iolink)
270{
271 struct kfd_iolink_properties *props;
272 struct kfd_topology_device *dev;
273 uint32_t i = 0;
274 uint32_t id_from;
275 uint32_t id_to;
276
277 BUG_ON(!iolink);
278
279 id_from = iolink->proximity_domain_from;
280 id_to = iolink->proximity_domain_to;
281
282 pr_info("Found IO link entry in CRAT table with id_from=%d\n", id_from);
283 list_for_each_entry(dev, &topology_device_list, list) {
284 if (id_from == i) {
285 props = kfd_alloc_struct(props);
286 if (props == NULL)
287 return -ENOMEM;
288
289 props->node_from = id_from;
290 props->node_to = id_to;
291 props->ver_maj = iolink->version_major;
292 props->ver_min = iolink->version_minor;
293
294 /*
295 * weight factor (derived from CDIR), currently always 1
296 */
297 props->weight = 1;
298
299 props->min_latency = iolink->minimum_latency;
300 props->max_latency = iolink->maximum_latency;
301 props->min_bandwidth = iolink->minimum_bandwidth_mbs;
302 props->max_bandwidth = iolink->maximum_bandwidth_mbs;
303 props->rec_transfer_size =
304 iolink->recommended_transfer_size;
305
306 dev->io_link_count++;
307 dev->node_props.io_links_count++;
308 list_add_tail(&props->list, &dev->io_link_props);
309
310 break;
311 }
312 i++;
313 }
314
315 return 0;
316}
317
318static int kfd_parse_subtype(struct crat_subtype_generic *sub_type_hdr)
319{
320 struct crat_subtype_computeunit *cu;
321 struct crat_subtype_memory *mem;
322 struct crat_subtype_cache *cache;
323 struct crat_subtype_iolink *iolink;
324 int ret = 0;
325
326 BUG_ON(!sub_type_hdr);
327
328 switch (sub_type_hdr->type) {
329 case CRAT_SUBTYPE_COMPUTEUNIT_AFFINITY:
330 cu = (struct crat_subtype_computeunit *)sub_type_hdr;
331 ret = kfd_parse_subtype_cu(cu);
332 break;
333 case CRAT_SUBTYPE_MEMORY_AFFINITY:
334 mem = (struct crat_subtype_memory *)sub_type_hdr;
335 ret = kfd_parse_subtype_mem(mem);
336 break;
337 case CRAT_SUBTYPE_CACHE_AFFINITY:
338 cache = (struct crat_subtype_cache *)sub_type_hdr;
339 ret = kfd_parse_subtype_cache(cache);
340 break;
341 case CRAT_SUBTYPE_TLB_AFFINITY:
342 /*
343 * For now, nothing to do here
344 */
345 pr_info("Found TLB entry in CRAT table (not processing)\n");
346 break;
347 case CRAT_SUBTYPE_CCOMPUTE_AFFINITY:
348 /*
349 * For now, nothing to do here
350 */
351 pr_info("Found CCOMPUTE entry in CRAT table (not processing)\n");
352 break;
353 case CRAT_SUBTYPE_IOLINK_AFFINITY:
354 iolink = (struct crat_subtype_iolink *)sub_type_hdr;
355 ret = kfd_parse_subtype_iolink(iolink);
356 break;
357 default:
358 pr_warn("Unknown subtype (%d) in CRAT\n",
359 sub_type_hdr->type);
360 }
361
362 return ret;
363}
364
365static void kfd_release_topology_device(struct kfd_topology_device *dev)
366{
367 struct kfd_mem_properties *mem;
368 struct kfd_cache_properties *cache;
369 struct kfd_iolink_properties *iolink;
370
371 BUG_ON(!dev);
372
373 list_del(&dev->list);
374
375 while (dev->mem_props.next != &dev->mem_props) {
376 mem = container_of(dev->mem_props.next,
377 struct kfd_mem_properties, list);
378 list_del(&mem->list);
379 kfree(mem);
380 }
381
382 while (dev->cache_props.next != &dev->cache_props) {
383 cache = container_of(dev->cache_props.next,
384 struct kfd_cache_properties, list);
385 list_del(&cache->list);
386 kfree(cache);
387 }
388
389 while (dev->io_link_props.next != &dev->io_link_props) {
390 iolink = container_of(dev->io_link_props.next,
391 struct kfd_iolink_properties, list);
392 list_del(&iolink->list);
393 kfree(iolink);
394 }
395
396 kfree(dev);
397
398 sys_props.num_devices--;
399}
400
401static void kfd_release_live_view(void)
402{
403 struct kfd_topology_device *dev;
404
405 while (topology_device_list.next != &topology_device_list) {
406 dev = container_of(topology_device_list.next,
407 struct kfd_topology_device, list);
408 kfd_release_topology_device(dev);
409}
410
411 memset(&sys_props, 0, sizeof(sys_props));
412}
413
414static struct kfd_topology_device *kfd_create_topology_device(void)
415{
416 struct kfd_topology_device *dev;
417
418 dev = kfd_alloc_struct(dev);
419 if (dev == NULL) {
420 pr_err("No memory to allocate a topology device");
421 return NULL;
422 }
423
424 INIT_LIST_HEAD(&dev->mem_props);
425 INIT_LIST_HEAD(&dev->cache_props);
426 INIT_LIST_HEAD(&dev->io_link_props);
427
428 list_add_tail(&dev->list, &topology_device_list);
429 sys_props.num_devices++;
430
431 return dev;
432}
433
434static int kfd_parse_crat_table(void *crat_image)
435{
436 struct kfd_topology_device *top_dev;
437 struct crat_subtype_generic *sub_type_hdr;
438 uint16_t node_id;
439 int ret;
440 struct crat_header *crat_table = (struct crat_header *)crat_image;
441 uint16_t num_nodes;
442 uint32_t image_len;
443
444 if (!crat_image)
445 return -EINVAL;
446
447 num_nodes = crat_table->num_domains;
448 image_len = crat_table->length;
449
450 pr_info("Parsing CRAT table with %d nodes\n", num_nodes);
451
452 for (node_id = 0; node_id < num_nodes; node_id++) {
453 top_dev = kfd_create_topology_device();
454 if (!top_dev) {
455 kfd_release_live_view();
456 return -ENOMEM;
457 }
458 }
459
460 sys_props.platform_id =
461 (*((uint64_t *)crat_table->oem_id)) & CRAT_OEMID_64BIT_MASK;
462 sys_props.platform_oem = *((uint64_t *)crat_table->oem_table_id);
463 sys_props.platform_rev = crat_table->revision;
464
465 sub_type_hdr = (struct crat_subtype_generic *)(crat_table+1);
466 while ((char *)sub_type_hdr + sizeof(struct crat_subtype_generic) <
467 ((char *)crat_image) + image_len) {
468 if (sub_type_hdr->flags & CRAT_SUBTYPE_FLAGS_ENABLED) {
469 ret = kfd_parse_subtype(sub_type_hdr);
470 if (ret != 0) {
471 kfd_release_live_view();
472 return ret;
473 }
474 }
475
476 sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
477 sub_type_hdr->length);
478 }
479
480 sys_props.generation_count++;
481 topology_crat_parsed = 1;
482
483 return 0;
484}
485
486
487#define sysfs_show_gen_prop(buffer, fmt, ...) \
488 snprintf(buffer, PAGE_SIZE, "%s"fmt, buffer, __VA_ARGS__)
489#define sysfs_show_32bit_prop(buffer, name, value) \
490 sysfs_show_gen_prop(buffer, "%s %u\n", name, value)
491#define sysfs_show_64bit_prop(buffer, name, value) \
492 sysfs_show_gen_prop(buffer, "%s %llu\n", name, value)
493#define sysfs_show_32bit_val(buffer, value) \
494 sysfs_show_gen_prop(buffer, "%u\n", value)
495#define sysfs_show_str_val(buffer, value) \
496 sysfs_show_gen_prop(buffer, "%s\n", value)
497
498static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
499 char *buffer)
500{
501 ssize_t ret;
502
503 /* Making sure that the buffer is an empty string */
504 buffer[0] = 0;
505
506 if (attr == &sys_props.attr_genid) {
507 ret = sysfs_show_32bit_val(buffer, sys_props.generation_count);
508 } else if (attr == &sys_props.attr_props) {
509 sysfs_show_64bit_prop(buffer, "platform_oem",
510 sys_props.platform_oem);
511 sysfs_show_64bit_prop(buffer, "platform_id",
512 sys_props.platform_id);
513 ret = sysfs_show_64bit_prop(buffer, "platform_rev",
514 sys_props.platform_rev);
515 } else {
516 ret = -EINVAL;
517 }
518
519 return ret;
520}
521
522static const struct sysfs_ops sysprops_ops = {
523 .show = sysprops_show,
524};
525
526static struct kobj_type sysprops_type = {
527 .sysfs_ops = &sysprops_ops,
528};
529
530static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
531 char *buffer)
532{
533 ssize_t ret;
534 struct kfd_iolink_properties *iolink;
535
536 /* Making sure that the buffer is an empty string */
537 buffer[0] = 0;
538
539 iolink = container_of(attr, struct kfd_iolink_properties, attr);
540 sysfs_show_32bit_prop(buffer, "type", iolink->iolink_type);
541 sysfs_show_32bit_prop(buffer, "version_major", iolink->ver_maj);
542 sysfs_show_32bit_prop(buffer, "version_minor", iolink->ver_min);
543 sysfs_show_32bit_prop(buffer, "node_from", iolink->node_from);
544 sysfs_show_32bit_prop(buffer, "node_to", iolink->node_to);
545 sysfs_show_32bit_prop(buffer, "weight", iolink->weight);
546 sysfs_show_32bit_prop(buffer, "min_latency", iolink->min_latency);
547 sysfs_show_32bit_prop(buffer, "max_latency", iolink->max_latency);
548 sysfs_show_32bit_prop(buffer, "min_bandwidth", iolink->min_bandwidth);
549 sysfs_show_32bit_prop(buffer, "max_bandwidth", iolink->max_bandwidth);
550 sysfs_show_32bit_prop(buffer, "recommended_transfer_size",
551 iolink->rec_transfer_size);
552 ret = sysfs_show_32bit_prop(buffer, "flags", iolink->flags);
553
554 return ret;
555}
556
557static const struct sysfs_ops iolink_ops = {
558 .show = iolink_show,
559};
560
561static struct kobj_type iolink_type = {
562 .sysfs_ops = &iolink_ops,
563};
564
565static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
566 char *buffer)
567{
568 ssize_t ret;
569 struct kfd_mem_properties *mem;
570
571 /* Making sure that the buffer is an empty string */
572 buffer[0] = 0;
573
574 mem = container_of(attr, struct kfd_mem_properties, attr);
575 sysfs_show_32bit_prop(buffer, "heap_type", mem->heap_type);
576 sysfs_show_64bit_prop(buffer, "size_in_bytes", mem->size_in_bytes);
577 sysfs_show_32bit_prop(buffer, "flags", mem->flags);
578 sysfs_show_32bit_prop(buffer, "width", mem->width);
579 ret = sysfs_show_32bit_prop(buffer, "mem_clk_max", mem->mem_clk_max);
580
581 return ret;
582}
583
584static const struct sysfs_ops mem_ops = {
585 .show = mem_show,
586};
587
588static struct kobj_type mem_type = {
589 .sysfs_ops = &mem_ops,
590};
591
592static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
593 char *buffer)
594{
595 ssize_t ret;
596 uint32_t i;
597 struct kfd_cache_properties *cache;
598
599 /* Making sure that the buffer is an empty string */
600 buffer[0] = 0;
601
602 cache = container_of(attr, struct kfd_cache_properties, attr);
603 sysfs_show_32bit_prop(buffer, "processor_id_low",
604 cache->processor_id_low);
605 sysfs_show_32bit_prop(buffer, "level", cache->cache_level);
606 sysfs_show_32bit_prop(buffer, "size", cache->cache_size);
607 sysfs_show_32bit_prop(buffer, "cache_line_size", cache->cacheline_size);
608 sysfs_show_32bit_prop(buffer, "cache_lines_per_tag",
609 cache->cachelines_per_tag);
610 sysfs_show_32bit_prop(buffer, "association", cache->cache_assoc);
611 sysfs_show_32bit_prop(buffer, "latency", cache->cache_latency);
612 sysfs_show_32bit_prop(buffer, "type", cache->cache_type);
613 snprintf(buffer, PAGE_SIZE, "%ssibling_map ", buffer);
614 for (i = 0; i < KFD_TOPOLOGY_CPU_SIBLINGS; i++)
615 ret = snprintf(buffer, PAGE_SIZE, "%s%d%s",
616 buffer, cache->sibling_map[i],
617 (i == KFD_TOPOLOGY_CPU_SIBLINGS-1) ?
618 "\n" : ",");
619
620 return ret;
621}
622
623static const struct sysfs_ops cache_ops = {
624 .show = kfd_cache_show,
625};
626
627static struct kobj_type cache_type = {
628 .sysfs_ops = &cache_ops,
629};
630
631static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
632 char *buffer)
633{
634 struct kfd_topology_device *dev;
635 char public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE];
636 uint32_t i;
637 uint32_t log_max_watch_addr;
638
639 /* Making sure that the buffer is an empty string */
640 buffer[0] = 0;
641
642 if (strcmp(attr->name, "gpu_id") == 0) {
643 dev = container_of(attr, struct kfd_topology_device,
644 attr_gpuid);
645 return sysfs_show_32bit_val(buffer, dev->gpu_id);
646 }
647
648 if (strcmp(attr->name, "name") == 0) {
649 dev = container_of(attr, struct kfd_topology_device,
650 attr_name);
651 for (i = 0; i < KFD_TOPOLOGY_PUBLIC_NAME_SIZE; i++) {
652 public_name[i] =
653 (char)dev->node_props.marketing_name[i];
654 if (dev->node_props.marketing_name[i] == 0)
655 break;
656 }
657 public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE-1] = 0x0;
658 return sysfs_show_str_val(buffer, public_name);
659 }
660
661 dev = container_of(attr, struct kfd_topology_device,
662 attr_props);
663 sysfs_show_32bit_prop(buffer, "cpu_cores_count",
664 dev->node_props.cpu_cores_count);
665 sysfs_show_32bit_prop(buffer, "simd_count",
666 dev->node_props.simd_count);
667
668 if (dev->mem_bank_count < dev->node_props.mem_banks_count) {
669 pr_info_once("kfd: mem_banks_count truncated from %d to %d\n",
670 dev->node_props.mem_banks_count,
671 dev->mem_bank_count);
672 sysfs_show_32bit_prop(buffer, "mem_banks_count",
673 dev->mem_bank_count);
674 } else {
675 sysfs_show_32bit_prop(buffer, "mem_banks_count",
676 dev->node_props.mem_banks_count);
677 }
678
679 sysfs_show_32bit_prop(buffer, "caches_count",
680 dev->node_props.caches_count);
681 sysfs_show_32bit_prop(buffer, "io_links_count",
682 dev->node_props.io_links_count);
683 sysfs_show_32bit_prop(buffer, "cpu_core_id_base",
684 dev->node_props.cpu_core_id_base);
685 sysfs_show_32bit_prop(buffer, "simd_id_base",
686 dev->node_props.simd_id_base);
687 sysfs_show_32bit_prop(buffer, "max_waves_per_simd",
688 dev->node_props.max_waves_per_simd);
689 sysfs_show_32bit_prop(buffer, "lds_size_in_kb",
690 dev->node_props.lds_size_in_kb);
691 sysfs_show_32bit_prop(buffer, "gds_size_in_kb",
692 dev->node_props.gds_size_in_kb);
693 sysfs_show_32bit_prop(buffer, "wave_front_size",
694 dev->node_props.wave_front_size);
695 sysfs_show_32bit_prop(buffer, "array_count",
696 dev->node_props.array_count);
697 sysfs_show_32bit_prop(buffer, "simd_arrays_per_engine",
698 dev->node_props.simd_arrays_per_engine);
699 sysfs_show_32bit_prop(buffer, "cu_per_simd_array",
700 dev->node_props.cu_per_simd_array);
701 sysfs_show_32bit_prop(buffer, "simd_per_cu",
702 dev->node_props.simd_per_cu);
703 sysfs_show_32bit_prop(buffer, "max_slots_scratch_cu",
704 dev->node_props.max_slots_scratch_cu);
705 sysfs_show_32bit_prop(buffer, "vendor_id",
706 dev->node_props.vendor_id);
707 sysfs_show_32bit_prop(buffer, "device_id",
708 dev->node_props.device_id);
709 sysfs_show_32bit_prop(buffer, "location_id",
710 dev->node_props.location_id);
711
712 if (dev->gpu) {
713 log_max_watch_addr =
714 __ilog2_u32(dev->gpu->device_info->num_of_watch_points);
715
716 if (log_max_watch_addr) {
717 dev->node_props.capability |=
718 HSA_CAP_WATCH_POINTS_SUPPORTED;
719
720 dev->node_props.capability |=
721 ((log_max_watch_addr <<
722 HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) &
723 HSA_CAP_WATCH_POINTS_TOTALBITS_MASK);
724 }
725
726 sysfs_show_32bit_prop(buffer, "max_engine_clk_fcompute",
727 dev->gpu->kfd2kgd->get_max_engine_clock_in_mhz(
728 dev->gpu->kgd));
729
730 sysfs_show_64bit_prop(buffer, "local_mem_size",
731 (unsigned long long int) 0);
732
733 sysfs_show_32bit_prop(buffer, "fw_version",
734 dev->gpu->kfd2kgd->get_fw_version(
735 dev->gpu->kgd,
736 KGD_ENGINE_MEC1));
737 sysfs_show_32bit_prop(buffer, "capability",
738 dev->node_props.capability);
739 }
740
741 return sysfs_show_32bit_prop(buffer, "max_engine_clk_ccompute",
742 cpufreq_quick_get_max(0)/1000);
743}
744
745static const struct sysfs_ops node_ops = {
746 .show = node_show,
747};
748
749static struct kobj_type node_type = {
750 .sysfs_ops = &node_ops,
751};
752
753static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
754{
755 sysfs_remove_file(kobj, attr);
756 kobject_del(kobj);
757 kobject_put(kobj);
758}
759
760static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
761{
762 struct kfd_iolink_properties *iolink;
763 struct kfd_cache_properties *cache;
764 struct kfd_mem_properties *mem;
765
766 BUG_ON(!dev);
767
768 if (dev->kobj_iolink) {
769 list_for_each_entry(iolink, &dev->io_link_props, list)
770 if (iolink->kobj) {
771 kfd_remove_sysfs_file(iolink->kobj,
772 &iolink->attr);
773 iolink->kobj = NULL;
774 }
775 kobject_del(dev->kobj_iolink);
776 kobject_put(dev->kobj_iolink);
777 dev->kobj_iolink = NULL;
778 }
779
780 if (dev->kobj_cache) {
781 list_for_each_entry(cache, &dev->cache_props, list)
782 if (cache->kobj) {
783 kfd_remove_sysfs_file(cache->kobj,
784 &cache->attr);
785 cache->kobj = NULL;
786 }
787 kobject_del(dev->kobj_cache);
788 kobject_put(dev->kobj_cache);
789 dev->kobj_cache = NULL;
790 }
791
792 if (dev->kobj_mem) {
793 list_for_each_entry(mem, &dev->mem_props, list)
794 if (mem->kobj) {
795 kfd_remove_sysfs_file(mem->kobj, &mem->attr);
796 mem->kobj = NULL;
797 }
798 kobject_del(dev->kobj_mem);
799 kobject_put(dev->kobj_mem);
800 dev->kobj_mem = NULL;
801 }
802
803 if (dev->kobj_node) {
804 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
805 sysfs_remove_file(dev->kobj_node, &dev->attr_name);
806 sysfs_remove_file(dev->kobj_node, &dev->attr_props);
807 kobject_del(dev->kobj_node);
808 kobject_put(dev->kobj_node);
809 dev->kobj_node = NULL;
810 }
811}
812
813static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
814 uint32_t id)
815{
816 struct kfd_iolink_properties *iolink;
817 struct kfd_cache_properties *cache;
818 struct kfd_mem_properties *mem;
819 int ret;
820 uint32_t i;
821
822 BUG_ON(!dev);
823
824 /*
825 * Creating the sysfs folders
826 */
827 BUG_ON(dev->kobj_node);
828 dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
829 if (!dev->kobj_node)
830 return -ENOMEM;
831
832 ret = kobject_init_and_add(dev->kobj_node, &node_type,
833 sys_props.kobj_nodes, "%d", id);
834 if (ret < 0)
835 return ret;
836
837 dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
838 if (!dev->kobj_mem)
839 return -ENOMEM;
840
841 dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
842 if (!dev->kobj_cache)
843 return -ENOMEM;
844
845 dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
846 if (!dev->kobj_iolink)
847 return -ENOMEM;
848
849 /*
850 * Creating sysfs files for node properties
851 */
852 dev->attr_gpuid.name = "gpu_id";
853 dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
854 sysfs_attr_init(&dev->attr_gpuid);
855 dev->attr_name.name = "name";
856 dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
857 sysfs_attr_init(&dev->attr_name);
858 dev->attr_props.name = "properties";
859 dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
860 sysfs_attr_init(&dev->attr_props);
861 ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
862 if (ret < 0)
863 return ret;
864 ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
865 if (ret < 0)
866 return ret;
867 ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
868 if (ret < 0)
869 return ret;
870
871 i = 0;
872 list_for_each_entry(mem, &dev->mem_props, list) {
873 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
874 if (!mem->kobj)
875 return -ENOMEM;
876 ret = kobject_init_and_add(mem->kobj, &mem_type,
877 dev->kobj_mem, "%d", i);
878 if (ret < 0)
879 return ret;
880
881 mem->attr.name = "properties";
882 mem->attr.mode = KFD_SYSFS_FILE_MODE;
883 sysfs_attr_init(&mem->attr);
884 ret = sysfs_create_file(mem->kobj, &mem->attr);
885 if (ret < 0)
886 return ret;
887 i++;
888 }
889
890 i = 0;
891 list_for_each_entry(cache, &dev->cache_props, list) {
892 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
893 if (!cache->kobj)
894 return -ENOMEM;
895 ret = kobject_init_and_add(cache->kobj, &cache_type,
896 dev->kobj_cache, "%d", i);
897 if (ret < 0)
898 return ret;
899
900 cache->attr.name = "properties";
901 cache->attr.mode = KFD_SYSFS_FILE_MODE;
902 sysfs_attr_init(&cache->attr);
903 ret = sysfs_create_file(cache->kobj, &cache->attr);
904 if (ret < 0)
905 return ret;
906 i++;
907 }
908
909 i = 0;
910 list_for_each_entry(iolink, &dev->io_link_props, list) {
911 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
912 if (!iolink->kobj)
913 return -ENOMEM;
914 ret = kobject_init_and_add(iolink->kobj, &iolink_type,
915 dev->kobj_iolink, "%d", i);
916 if (ret < 0)
917 return ret;
918
919 iolink->attr.name = "properties";
920 iolink->attr.mode = KFD_SYSFS_FILE_MODE;
921 sysfs_attr_init(&iolink->attr);
922 ret = sysfs_create_file(iolink->kobj, &iolink->attr);
923 if (ret < 0)
924 return ret;
925 i++;
926}
927
928 return 0;
929}
930
931static int kfd_build_sysfs_node_tree(void)
932{
933 struct kfd_topology_device *dev;
934 int ret;
935 uint32_t i = 0;
936
937 list_for_each_entry(dev, &topology_device_list, list) {
938 ret = kfd_build_sysfs_node_entry(dev, i);
939 if (ret < 0)
940 return ret;
941 i++;
942 }
943
944 return 0;
945}
946
947static void kfd_remove_sysfs_node_tree(void)
948{
949 struct kfd_topology_device *dev;
950
951 list_for_each_entry(dev, &topology_device_list, list)
952 kfd_remove_sysfs_node_entry(dev);
953}
954
955static int kfd_topology_update_sysfs(void)
956{
957 int ret;
958
959 pr_info("Creating topology SYSFS entries\n");
960 if (sys_props.kobj_topology == NULL) {
961 sys_props.kobj_topology =
962 kfd_alloc_struct(sys_props.kobj_topology);
963 if (!sys_props.kobj_topology)
964 return -ENOMEM;
965
966 ret = kobject_init_and_add(sys_props.kobj_topology,
967 &sysprops_type, &kfd_device->kobj,
968 "topology");
969 if (ret < 0)
970 return ret;
971
972 sys_props.kobj_nodes = kobject_create_and_add("nodes",
973 sys_props.kobj_topology);
974 if (!sys_props.kobj_nodes)
975 return -ENOMEM;
976
977 sys_props.attr_genid.name = "generation_id";
978 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
979 sysfs_attr_init(&sys_props.attr_genid);
980 ret = sysfs_create_file(sys_props.kobj_topology,
981 &sys_props.attr_genid);
982 if (ret < 0)
983 return ret;
984
985 sys_props.attr_props.name = "system_properties";
986 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
987 sysfs_attr_init(&sys_props.attr_props);
988 ret = sysfs_create_file(sys_props.kobj_topology,
989 &sys_props.attr_props);
990 if (ret < 0)
991 return ret;
992 }
993
994 kfd_remove_sysfs_node_tree();
995
996 return kfd_build_sysfs_node_tree();
997}
998
999static void kfd_topology_release_sysfs(void)
1000{
1001 kfd_remove_sysfs_node_tree();
1002 if (sys_props.kobj_topology) {
1003 sysfs_remove_file(sys_props.kobj_topology,
1004 &sys_props.attr_genid);
1005 sysfs_remove_file(sys_props.kobj_topology,
1006 &sys_props.attr_props);
1007 if (sys_props.kobj_nodes) {
1008 kobject_del(sys_props.kobj_nodes);
1009 kobject_put(sys_props.kobj_nodes);
1010 sys_props.kobj_nodes = NULL;
1011 }
1012 kobject_del(sys_props.kobj_topology);
1013 kobject_put(sys_props.kobj_topology);
1014 sys_props.kobj_topology = NULL;
1015 }
1016}
1017
1018int kfd_topology_init(void)
1019{
1020 void *crat_image = NULL;
1021 size_t image_size = 0;
1022 int ret;
1023
1024 /*
1025 * Initialize the head for the topology device list
1026 */
1027 INIT_LIST_HEAD(&topology_device_list);
1028 init_rwsem(&topology_lock);
1029 topology_crat_parsed = 0;
1030
1031 memset(&sys_props, 0, sizeof(sys_props));
1032
1033 /*
1034 * Get the CRAT image from the ACPI
1035 */
1036 ret = kfd_topology_get_crat_acpi(crat_image, &image_size);
1037 if (ret == 0 && image_size > 0) {
1038 pr_info("Found CRAT image with size=%zd\n", image_size);
1039 crat_image = kmalloc(image_size, GFP_KERNEL);
1040 if (!crat_image) {
1041 ret = -ENOMEM;
1042 pr_err("No memory for allocating CRAT image\n");
1043 goto err;
1044 }
1045 ret = kfd_topology_get_crat_acpi(crat_image, &image_size);
1046
1047 if (ret == 0) {
1048 down_write(&topology_lock);
1049 ret = kfd_parse_crat_table(crat_image);
1050 if (ret == 0)
1051 ret = kfd_topology_update_sysfs();
1052 up_write(&topology_lock);
1053 } else {
1054 pr_err("Couldn't get CRAT table size from ACPI\n");
1055 }
1056 kfree(crat_image);
1057 } else if (ret == -ENODATA) {
1058 ret = 0;
1059 } else {
1060 pr_err("Couldn't get CRAT table size from ACPI\n");
1061 }
1062
1063err:
1064 pr_info("Finished initializing topology ret=%d\n", ret);
1065 return ret;
1066}
1067
1068void kfd_topology_shutdown(void)
1069{
1070 kfd_topology_release_sysfs();
1071 kfd_release_live_view();
1072}
1073
1074static void kfd_debug_print_topology(void)
1075{
1076 struct kfd_topology_device *dev;
1077 uint32_t i = 0;
1078
1079 pr_info("DEBUG PRINT OF TOPOLOGY:");
1080 list_for_each_entry(dev, &topology_device_list, list) {
1081 pr_info("Node: %d\n", i);
1082 pr_info("\tGPU assigned: %s\n", (dev->gpu ? "yes" : "no"));
1083 pr_info("\tCPU count: %d\n", dev->node_props.cpu_cores_count);
1084 pr_info("\tSIMD count: %d", dev->node_props.simd_count);
1085 i++;
1086 }
1087}
1088
1089static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
1090{
1091 uint32_t hashout;
1092 uint32_t buf[7];
1093 uint64_t local_mem_size;
1094 int i;
1095
1096 if (!gpu)
1097 return 0;
1098
1099 local_mem_size = gpu->kfd2kgd->get_vmem_size(gpu->kgd);
1100
1101 buf[0] = gpu->pdev->devfn;
1102 buf[1] = gpu->pdev->subsystem_vendor;
1103 buf[2] = gpu->pdev->subsystem_device;
1104 buf[3] = gpu->pdev->device;
1105 buf[4] = gpu->pdev->bus->number;
1106 buf[5] = lower_32_bits(local_mem_size);
1107 buf[6] = upper_32_bits(local_mem_size);
1108
1109 for (i = 0, hashout = 0; i < 7; i++)
1110 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1111
1112 return hashout;
1113}
1114
1115static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
1116{
1117 struct kfd_topology_device *dev;
1118 struct kfd_topology_device *out_dev = NULL;
1119
1120 BUG_ON(!gpu);
1121
1122 list_for_each_entry(dev, &topology_device_list, list)
1123 if (dev->gpu == NULL && dev->node_props.simd_count > 0) {
1124 dev->gpu = gpu;
1125 out_dev = dev;
1126 break;
1127 }
1128
1129 return out_dev;
1130}
1131
1132static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1133{
1134 /*
1135 * TODO: Generate an event for thunk about the arrival/removal
1136 * of the GPU
1137 */
1138}
1139
1140int kfd_topology_add_device(struct kfd_dev *gpu)
1141{
1142 uint32_t gpu_id;
1143 struct kfd_topology_device *dev;
1144 int res;
1145
1146 BUG_ON(!gpu);
1147
1148 gpu_id = kfd_generate_gpu_id(gpu);
1149
1150 pr_debug("kfd: Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1151
1152 down_write(&topology_lock);
1153 /*
1154 * Try to assign the GPU to existing topology device (generated from
1155 * CRAT table
1156 */
1157 dev = kfd_assign_gpu(gpu);
1158 if (!dev) {
1159 pr_info("GPU was not found in the current topology. Extending.\n");
1160 kfd_debug_print_topology();
1161 dev = kfd_create_topology_device();
1162 if (!dev) {
1163 res = -ENOMEM;
1164 goto err;
1165 }
1166 dev->gpu = gpu;
1167
1168 /*
1169 * TODO: Make a call to retrieve topology information from the
1170 * GPU vBIOS
1171 */
1172
1173 /*
1174 * Update the SYSFS tree, since we added another topology device
1175 */
1176 if (kfd_topology_update_sysfs() < 0)
1177 kfd_topology_release_sysfs();
1178
1179 }
1180
1181 dev->gpu_id = gpu_id;
1182 gpu->id = gpu_id;
1183 dev->node_props.vendor_id = gpu->pdev->vendor;
1184 dev->node_props.device_id = gpu->pdev->device;
1185 dev->node_props.location_id = (gpu->pdev->bus->number << 24) +
1186 (gpu->pdev->devfn & 0xffffff);
1187 /*
1188 * TODO: Retrieve max engine clock values from KGD
1189 */
1190
1191 if (dev->gpu->device_info->asic_family == CHIP_CARRIZO) {
1192 dev->node_props.capability |= HSA_CAP_DOORBELL_PACKET_TYPE;
1193 pr_info("amdkfd: adding doorbell packet type capability\n");
1194 }
1195
1196 res = 0;
1197
1198err:
1199 up_write(&topology_lock);
1200
1201 if (res == 0)
1202 kfd_notify_gpu_change(gpu_id, 1);
1203
1204 return res;
1205}
1206
1207int kfd_topology_remove_device(struct kfd_dev *gpu)
1208{
1209 struct kfd_topology_device *dev;
1210 uint32_t gpu_id;
1211 int res = -ENODEV;
1212
1213 BUG_ON(!gpu);
1214
1215 down_write(&topology_lock);
1216
1217 list_for_each_entry(dev, &topology_device_list, list)
1218 if (dev->gpu == gpu) {
1219 gpu_id = dev->gpu_id;
1220 kfd_remove_sysfs_node_entry(dev);
1221 kfd_release_topology_device(dev);
1222 res = 0;
1223 if (kfd_topology_update_sysfs() < 0)
1224 kfd_topology_release_sysfs();
1225 break;
1226 }
1227
1228 up_write(&topology_lock);
1229
1230 if (res == 0)
1231 kfd_notify_gpu_change(gpu_id, 0);
1232
1233 return res;
1234}
1235
1236/*
1237 * When idx is out of bounds, the function will return NULL
1238 */
1239struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx)
1240{
1241
1242 struct kfd_topology_device *top_dev;
1243 struct kfd_dev *device = NULL;
1244 uint8_t device_idx = 0;
1245
1246 down_read(&topology_lock);
1247
1248 list_for_each_entry(top_dev, &topology_device_list, list) {
1249 if (device_idx == idx) {
1250 device = top_dev->gpu;
1251 break;
1252 }
1253
1254 device_idx++;
1255 }
1256
1257 up_read(&topology_lock);
1258
1259 return device;
1260
1261}