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amdkfd: Fix sparse warnings in kfd_chardev.c
[linux-2.6-block.git] / drivers / gpu / drm / amd / amdkfd / kfd_topology.c
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5b5c4e40
EP		 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
31#include "kfd_priv.h"
32#include "kfd_crat.h"
33#include "kfd_topology.h"
34
35static struct list_head topology_device_list;
36static int topology_crat_parsed;
37static struct kfd_system_properties sys_props;
38
39static DECLARE_RWSEM(topology_lock);
40
41struct kfd_dev *kfd_device_by_id(uint32_t gpu_id)
42{
43 struct kfd_topology_device *top_dev;
44 struct kfd_dev *device = NULL;
45
46 down_read(&topology_lock);
47
48 list_for_each_entry(top_dev, &topology_device_list, list)
49 if (top_dev->gpu_id == gpu_id) {
50 device = top_dev->gpu;
51 break;
52 }
53
54 up_read(&topology_lock);
55
56 return device;
57}
58
59struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
60{
61 struct kfd_topology_device *top_dev;
62 struct kfd_dev *device = NULL;
63
64 down_read(&topology_lock);
65
66 list_for_each_entry(top_dev, &topology_device_list, list)
67 if (top_dev->gpu->pdev == pdev) {
68 device = top_dev->gpu;
69 break;
70 }
71
72 up_read(&topology_lock);
73
74 return device;
75}
76
77static int kfd_topology_get_crat_acpi(void *crat_image, size_t *size)
78{
79 struct acpi_table_header *crat_table;
80 acpi_status status;
81
82 if (!size)
83 return -EINVAL;
84
85 /*
86 * Fetch the CRAT table from ACPI
87 */
88 status = acpi_get_table(CRAT_SIGNATURE, 0, &crat_table);
89 if (status == AE_NOT_FOUND) {
90 pr_warn("CRAT table not found\n");
91 return -ENODATA;
92 } else if (ACPI_FAILURE(status)) {
93 const char *err = acpi_format_exception(status);
94
95 pr_err("CRAT table error: %s\n", err);
96 return -EINVAL;
97 }
98
99 if (*size >= crat_table->length && crat_image != 0)
100 memcpy(crat_image, crat_table, crat_table->length);
101
102 *size = crat_table->length;
103
104 return 0;
105}
106
107static void kfd_populated_cu_info_cpu(struct kfd_topology_device *dev,
108 struct crat_subtype_computeunit *cu)
109{
110 BUG_ON(!dev);
111 BUG_ON(!cu);
112
113 dev->node_props.cpu_cores_count = cu->num_cpu_cores;
114 dev->node_props.cpu_core_id_base = cu->processor_id_low;
115 if (cu->hsa_capability & CRAT_CU_FLAGS_IOMMU_PRESENT)
116 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
117
118 pr_info("CU CPU: cores=%d id_base=%d\n", cu->num_cpu_cores,
119 cu->processor_id_low);
120}
121
122static void kfd_populated_cu_info_gpu(struct kfd_topology_device *dev,
123 struct crat_subtype_computeunit *cu)
124{
125 BUG_ON(!dev);
126 BUG_ON(!cu);
127
128 dev->node_props.simd_id_base = cu->processor_id_low;
129 dev->node_props.simd_count = cu->num_simd_cores;
130 dev->node_props.lds_size_in_kb = cu->lds_size_in_kb;
131 dev->node_props.max_waves_per_simd = cu->max_waves_simd;
132 dev->node_props.wave_front_size = cu->wave_front_size;
133 dev->node_props.mem_banks_count = cu->num_banks;
134 dev->node_props.array_count = cu->num_arrays;
135 dev->node_props.cu_per_simd_array = cu->num_cu_per_array;
136 dev->node_props.simd_per_cu = cu->num_simd_per_cu;
137 dev->node_props.max_slots_scratch_cu = cu->max_slots_scatch_cu;
138 if (cu->hsa_capability & CRAT_CU_FLAGS_HOT_PLUGGABLE)
139 dev->node_props.capability |= HSA_CAP_HOT_PLUGGABLE;
140 pr_info("CU GPU: simds=%d id_base=%d\n", cu->num_simd_cores,
141 cu->processor_id_low);
142}
143
144/* kfd_parse_subtype_cu is called when the topology mutex is already acquired */
145static int kfd_parse_subtype_cu(struct crat_subtype_computeunit *cu)
146{
147 struct kfd_topology_device *dev;
148 int i = 0;
149
150 BUG_ON(!cu);
151
152 pr_info("Found CU entry in CRAT table with proximity_domain=%d caps=%x\n",
153 cu->proximity_domain, cu->hsa_capability);
154 list_for_each_entry(dev, &topology_device_list, list) {
155 if (cu->proximity_domain == i) {
156 if (cu->flags & CRAT_CU_FLAGS_CPU_PRESENT)
157 kfd_populated_cu_info_cpu(dev, cu);
158
159 if (cu->flags & CRAT_CU_FLAGS_GPU_PRESENT)
160 kfd_populated_cu_info_gpu(dev, cu);
161 break;
162 }
163 i++;
164 }
165
166 return 0;
167}
168
169/*
170 * kfd_parse_subtype_mem is called when the topology mutex is
171 * already acquired
172 */
173static int kfd_parse_subtype_mem(struct crat_subtype_memory *mem)
174{
175 struct kfd_mem_properties *props;
176 struct kfd_topology_device *dev;
177 int i = 0;
178
179 BUG_ON(!mem);
180
181 pr_info("Found memory entry in CRAT table with proximity_domain=%d\n",
182 mem->promixity_domain);
183 list_for_each_entry(dev, &topology_device_list, list) {
184 if (mem->promixity_domain == i) {
185 props = kfd_alloc_struct(props);
186 if (props == 0)
187 return -ENOMEM;
188
189 if (dev->node_props.cpu_cores_count == 0)
190 props->heap_type = HSA_MEM_HEAP_TYPE_FB_PRIVATE;
191 else
192 props->heap_type = HSA_MEM_HEAP_TYPE_SYSTEM;
193
194 if (mem->flags & CRAT_MEM_FLAGS_HOT_PLUGGABLE)
195 props->flags |= HSA_MEM_FLAGS_HOT_PLUGGABLE;
196 if (mem->flags & CRAT_MEM_FLAGS_NON_VOLATILE)
197 props->flags |= HSA_MEM_FLAGS_NON_VOLATILE;
198
199 props->size_in_bytes =
200 ((uint64_t)mem->length_high << 32) +
201 mem->length_low;
202 props->width = mem->width;
203
204 dev->mem_bank_count++;
205 list_add_tail(&props->list, &dev->mem_props);
206
207 break;
208 }
209 i++;
210 }
211
212 return 0;
213}
214
215/*
216 * kfd_parse_subtype_cache is called when the topology mutex
217 * is already acquired
218 */
219static int kfd_parse_subtype_cache(struct crat_subtype_cache *cache)
220{
221 struct kfd_cache_properties *props;
222 struct kfd_topology_device *dev;
223 uint32_t id;
224
225 BUG_ON(!cache);
226
227 id = cache->processor_id_low;
228
229 pr_info("Found cache entry in CRAT table with processor_id=%d\n", id);
230 list_for_each_entry(dev, &topology_device_list, list)
231 if (id == dev->node_props.cpu_core_id_base ||
232 id == dev->node_props.simd_id_base) {
233 props = kfd_alloc_struct(props);
234 if (props == 0)
235 return -ENOMEM;
236
237 props->processor_id_low = id;
238 props->cache_level = cache->cache_level;
239 props->cache_size = cache->cache_size;
240 props->cacheline_size = cache->cache_line_size;
241 props->cachelines_per_tag = cache->lines_per_tag;
242 props->cache_assoc = cache->associativity;
243 props->cache_latency = cache->cache_latency;
244
245 if (cache->flags & CRAT_CACHE_FLAGS_DATA_CACHE)
246 props->cache_type |= HSA_CACHE_TYPE_DATA;
247 if (cache->flags & CRAT_CACHE_FLAGS_INST_CACHE)
248 props->cache_type |= HSA_CACHE_TYPE_INSTRUCTION;
249 if (cache->flags & CRAT_CACHE_FLAGS_CPU_CACHE)
250 props->cache_type |= HSA_CACHE_TYPE_CPU;
251 if (cache->flags & CRAT_CACHE_FLAGS_SIMD_CACHE)
252 props->cache_type |= HSA_CACHE_TYPE_HSACU;
253
254 dev->cache_count++;
255 dev->node_props.caches_count++;
256 list_add_tail(&props->list, &dev->cache_props);
257
258 break;
259 }
260
261 return 0;
262}
263
264/*
265 * kfd_parse_subtype_iolink is called when the topology mutex
266 * is already acquired
267 */
268static int kfd_parse_subtype_iolink(struct crat_subtype_iolink *iolink)
269{
270 struct kfd_iolink_properties *props;
271 struct kfd_topology_device *dev;
272 uint32_t i = 0;
273 uint32_t id_from;
274 uint32_t id_to;
275
276 BUG_ON(!iolink);
277
278 id_from = iolink->proximity_domain_from;
279 id_to = iolink->proximity_domain_to;
280
281 pr_info("Found IO link entry in CRAT table with id_from=%d\n", id_from);
282 list_for_each_entry(dev, &topology_device_list, list) {
283 if (id_from == i) {
284 props = kfd_alloc_struct(props);
285 if (props == 0)
286 return -ENOMEM;
287
288 props->node_from = id_from;
289 props->node_to = id_to;
290 props->ver_maj = iolink->version_major;
291 props->ver_min = iolink->version_minor;
292
293 /*
294 * weight factor (derived from CDIR), currently always 1
295 */
296 props->weight = 1;
297
298 props->min_latency = iolink->minimum_latency;
299 props->max_latency = iolink->maximum_latency;
300 props->min_bandwidth = iolink->minimum_bandwidth_mbs;
301 props->max_bandwidth = iolink->maximum_bandwidth_mbs;
302 props->rec_transfer_size =
303 iolink->recommended_transfer_size;
304
305 dev->io_link_count++;
306 dev->node_props.io_links_count++;
307 list_add_tail(&props->list, &dev->io_link_props);
308
309 break;
310 }
311 i++;
312 }
313
314 return 0;
315}
316
317static int kfd_parse_subtype(struct crat_subtype_generic *sub_type_hdr)
318{
319 struct crat_subtype_computeunit *cu;
320 struct crat_subtype_memory *mem;
321 struct crat_subtype_cache *cache;
322 struct crat_subtype_iolink *iolink;
323 int ret = 0;
324
325 BUG_ON(!sub_type_hdr);
326
327 switch (sub_type_hdr->type) {
328 case CRAT_SUBTYPE_COMPUTEUNIT_AFFINITY:
329 cu = (struct crat_subtype_computeunit *)sub_type_hdr;
330 ret = kfd_parse_subtype_cu(cu);
331 break;
332 case CRAT_SUBTYPE_MEMORY_AFFINITY:
333 mem = (struct crat_subtype_memory *)sub_type_hdr;
334 ret = kfd_parse_subtype_mem(mem);
335 break;
336 case CRAT_SUBTYPE_CACHE_AFFINITY:
337 cache = (struct crat_subtype_cache *)sub_type_hdr;
338 ret = kfd_parse_subtype_cache(cache);
339 break;
340 case CRAT_SUBTYPE_TLB_AFFINITY:
341 /*
342 * For now, nothing to do here
343 */
344 pr_info("Found TLB entry in CRAT table (not processing)\n");
345 break;
346 case CRAT_SUBTYPE_CCOMPUTE_AFFINITY:
347 /*
348 * For now, nothing to do here
349 */
350 pr_info("Found CCOMPUTE entry in CRAT table (not processing)\n");
351 break;
352 case CRAT_SUBTYPE_IOLINK_AFFINITY:
353 iolink = (struct crat_subtype_iolink *)sub_type_hdr;
354 ret = kfd_parse_subtype_iolink(iolink);
355 break;
356 default:
357 pr_warn("Unknown subtype (%d) in CRAT\n",
358 sub_type_hdr->type);
359 }
360
361 return ret;
362}
363
364static void kfd_release_topology_device(struct kfd_topology_device *dev)
365{
366 struct kfd_mem_properties *mem;
367 struct kfd_cache_properties *cache;
368 struct kfd_iolink_properties *iolink;
369
370 BUG_ON(!dev);
371
372 list_del(&dev->list);
373
374 while (dev->mem_props.next != &dev->mem_props) {
375 mem = container_of(dev->mem_props.next,
376 struct kfd_mem_properties, list);
377 list_del(&mem->list);
378 kfree(mem);
379 }
380
381 while (dev->cache_props.next != &dev->cache_props) {
382 cache = container_of(dev->cache_props.next,
383 struct kfd_cache_properties, list);
384 list_del(&cache->list);
385 kfree(cache);
386 }
387
388 while (dev->io_link_props.next != &dev->io_link_props) {
389 iolink = container_of(dev->io_link_props.next,
390 struct kfd_iolink_properties, list);
391 list_del(&iolink->list);
392 kfree(iolink);
393 }
394
395 kfree(dev);
396
397 sys_props.num_devices--;
398}
399
400static void kfd_release_live_view(void)
401{
402 struct kfd_topology_device *dev;
403
404 while (topology_device_list.next != &topology_device_list) {
405 dev = container_of(topology_device_list.next,
406 struct kfd_topology_device, list);
407 kfd_release_topology_device(dev);
408}
409
410 memset(&sys_props, 0, sizeof(sys_props));
411}
412
413static struct kfd_topology_device *kfd_create_topology_device(void)
414{
415 struct kfd_topology_device *dev;
416
417 dev = kfd_alloc_struct(dev);
418 if (dev == 0) {
419 pr_err("No memory to allocate a topology device");
420 return 0;
421 }
422
423 INIT_LIST_HEAD(&dev->mem_props);
424 INIT_LIST_HEAD(&dev->cache_props);
425 INIT_LIST_HEAD(&dev->io_link_props);
426
427 list_add_tail(&dev->list, &topology_device_list);
428 sys_props.num_devices++;
429
430 return dev;
431 }
432
433static int kfd_parse_crat_table(void *crat_image)
434{
435 struct kfd_topology_device *top_dev;
436 struct crat_subtype_generic *sub_type_hdr;
437 uint16_t node_id;
438 int ret;
439 struct crat_header *crat_table = (struct crat_header *)crat_image;
440 uint16_t num_nodes;
441 uint32_t image_len;
442
443 if (!crat_image)
444 return -EINVAL;
445
446 num_nodes = crat_table->num_domains;
447 image_len = crat_table->length;
448
449 pr_info("Parsing CRAT table with %d nodes\n", num_nodes);
450
451 for (node_id = 0; node_id < num_nodes; node_id++) {
452 top_dev = kfd_create_topology_device();
453 if (!top_dev) {
454 kfd_release_live_view();
455 return -ENOMEM;
456 }
457 }
458
459 sys_props.platform_id =
460 (*((uint64_t *)crat_table->oem_id)) & CRAT_OEMID_64BIT_MASK;
461 sys_props.platform_oem = *((uint64_t *)crat_table->oem_table_id);
462 sys_props.platform_rev = crat_table->revision;
463
464 sub_type_hdr = (struct crat_subtype_generic *)(crat_table+1);
465 while ((char *)sub_type_hdr + sizeof(struct crat_subtype_generic) <
466 ((char *)crat_image) + image_len) {
467 if (sub_type_hdr->flags & CRAT_SUBTYPE_FLAGS_ENABLED) {
468 ret = kfd_parse_subtype(sub_type_hdr);
469 if (ret != 0) {
470 kfd_release_live_view();
471 return ret;
472 }
473 }
474
475 sub_type_hdr = (typeof(sub_type_hdr))((char *)sub_type_hdr +
476 sub_type_hdr->length);
477 }
478
479 sys_props.generation_count++;
480 topology_crat_parsed = 1;
481
482 return 0;
483}
484
485
486#define sysfs_show_gen_prop(buffer, fmt, ...) \
487 snprintf(buffer, PAGE_SIZE, "%s"fmt, buffer, __VA_ARGS__)
488#define sysfs_show_32bit_prop(buffer, name, value) \
489 sysfs_show_gen_prop(buffer, "%s %u\n", name, value)
490#define sysfs_show_64bit_prop(buffer, name, value) \
491 sysfs_show_gen_prop(buffer, "%s %llu\n", name, value)
492#define sysfs_show_32bit_val(buffer, value) \
493 sysfs_show_gen_prop(buffer, "%u\n", value)
494#define sysfs_show_str_val(buffer, value) \
495 sysfs_show_gen_prop(buffer, "%s\n", value)
496
497static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
498 char *buffer)
499{
500 ssize_t ret;
501
502 /* Making sure that the buffer is an empty string */
503 buffer[0] = 0;
504
505 if (attr == &sys_props.attr_genid) {
506 ret = sysfs_show_32bit_val(buffer, sys_props.generation_count);
507 } else if (attr == &sys_props.attr_props) {
508 sysfs_show_64bit_prop(buffer, "platform_oem",
509 sys_props.platform_oem);
510 sysfs_show_64bit_prop(buffer, "platform_id",
511 sys_props.platform_id);
512 ret = sysfs_show_64bit_prop(buffer, "platform_rev",
513 sys_props.platform_rev);
514 } else {
515 ret = -EINVAL;
516 }
517
518 return ret;
519}
520
521static const struct sysfs_ops sysprops_ops = {
522 .show = sysprops_show,
523};
524
525static struct kobj_type sysprops_type = {
526 .sysfs_ops = &sysprops_ops,
527};
528
529static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
530 char *buffer)
531{
532 ssize_t ret;
533 struct kfd_iolink_properties *iolink;
534
535 /* Making sure that the buffer is an empty string */
536 buffer[0] = 0;
537
538 iolink = container_of(attr, struct kfd_iolink_properties, attr);
539 sysfs_show_32bit_prop(buffer, "type", iolink->iolink_type);
540 sysfs_show_32bit_prop(buffer, "version_major", iolink->ver_maj);
541 sysfs_show_32bit_prop(buffer, "version_minor", iolink->ver_min);
542 sysfs_show_32bit_prop(buffer, "node_from", iolink->node_from);
543 sysfs_show_32bit_prop(buffer, "node_to", iolink->node_to);
544 sysfs_show_32bit_prop(buffer, "weight", iolink->weight);
545 sysfs_show_32bit_prop(buffer, "min_latency", iolink->min_latency);
546 sysfs_show_32bit_prop(buffer, "max_latency", iolink->max_latency);
547 sysfs_show_32bit_prop(buffer, "min_bandwidth", iolink->min_bandwidth);
548 sysfs_show_32bit_prop(buffer, "max_bandwidth", iolink->max_bandwidth);
549 sysfs_show_32bit_prop(buffer, "recommended_transfer_size",
550 iolink->rec_transfer_size);
551 ret = sysfs_show_32bit_prop(buffer, "flags", iolink->flags);
552
553 return ret;
554}
555
556static const struct sysfs_ops iolink_ops = {
557 .show = iolink_show,
558};
559
560static struct kobj_type iolink_type = {
561 .sysfs_ops = &iolink_ops,
562};
563
564static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
565 char *buffer)
566{
567 ssize_t ret;
568 struct kfd_mem_properties *mem;
569
570 /* Making sure that the buffer is an empty string */
571 buffer[0] = 0;
572
573 mem = container_of(attr, struct kfd_mem_properties, attr);
574 sysfs_show_32bit_prop(buffer, "heap_type", mem->heap_type);
575 sysfs_show_64bit_prop(buffer, "size_in_bytes", mem->size_in_bytes);
576 sysfs_show_32bit_prop(buffer, "flags", mem->flags);
577 sysfs_show_32bit_prop(buffer, "width", mem->width);
578 ret = sysfs_show_32bit_prop(buffer, "mem_clk_max", mem->mem_clk_max);
579
580 return ret;
581}
582
583static const struct sysfs_ops mem_ops = {
584 .show = mem_show,
585};
586
587static struct kobj_type mem_type = {
588 .sysfs_ops = &mem_ops,
589};
590
591static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
592 char *buffer)
593{
594 ssize_t ret;
595 uint32_t i;
596 struct kfd_cache_properties *cache;
597
598 /* Making sure that the buffer is an empty string */
599 buffer[0] = 0;
600
601 cache = container_of(attr, struct kfd_cache_properties, attr);
602 sysfs_show_32bit_prop(buffer, "processor_id_low",
603 cache->processor_id_low);
604 sysfs_show_32bit_prop(buffer, "level", cache->cache_level);
605 sysfs_show_32bit_prop(buffer, "size", cache->cache_size);
606 sysfs_show_32bit_prop(buffer, "cache_line_size", cache->cacheline_size);
607 sysfs_show_32bit_prop(buffer, "cache_lines_per_tag",
608 cache->cachelines_per_tag);
609 sysfs_show_32bit_prop(buffer, "association", cache->cache_assoc);
610 sysfs_show_32bit_prop(buffer, "latency", cache->cache_latency);
611 sysfs_show_32bit_prop(buffer, "type", cache->cache_type);
612 snprintf(buffer, PAGE_SIZE, "%ssibling_map ", buffer);
613 for (i = 0; i < KFD_TOPOLOGY_CPU_SIBLINGS; i++)
614 ret = snprintf(buffer, PAGE_SIZE, "%s%d%s",
615 buffer, cache->sibling_map[i],
616 (i == KFD_TOPOLOGY_CPU_SIBLINGS-1) ?
617 "\n" : ",");
618
619 return ret;
620}
621
622static const struct sysfs_ops cache_ops = {
623 .show = kfd_cache_show,
624};
625
626static struct kobj_type cache_type = {
627 .sysfs_ops = &cache_ops,
628};
629
630static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
631 char *buffer)
632{
633 ssize_t ret;
634 struct kfd_topology_device *dev;
635 char public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE];
636 uint32_t i;
637
638 /* Making sure that the buffer is an empty string */
639 buffer[0] = 0;
640
641 if (strcmp(attr->name, "gpu_id") == 0) {
642 dev = container_of(attr, struct kfd_topology_device,
643 attr_gpuid);
644 ret = sysfs_show_32bit_val(buffer, dev->gpu_id);
645 } else if (strcmp(attr->name, "name") == 0) {
646 dev = container_of(attr, struct kfd_topology_device,
647 attr_name);
648 for (i = 0; i < KFD_TOPOLOGY_PUBLIC_NAME_SIZE; i++) {
649 public_name[i] =
650 (char)dev->node_props.marketing_name[i];
651 if (dev->node_props.marketing_name[i] == 0)
652 break;
653 }
654 public_name[KFD_TOPOLOGY_PUBLIC_NAME_SIZE-1] = 0x0;
655 ret = sysfs_show_str_val(buffer, public_name);
656 } else {
657 dev = container_of(attr, struct kfd_topology_device,
658 attr_props);
659 sysfs_show_32bit_prop(buffer, "cpu_cores_count",
660 dev->node_props.cpu_cores_count);
661 sysfs_show_32bit_prop(buffer, "simd_count",
662 dev->node_props.simd_count);
663
664 if (dev->mem_bank_count < dev->node_props.mem_banks_count) {
665 pr_warn("kfd: mem_banks_count truncated from %d to %d\n",
666 dev->node_props.mem_banks_count,
667 dev->mem_bank_count);
668 sysfs_show_32bit_prop(buffer, "mem_banks_count",
669 dev->mem_bank_count);
670 } else {
671 sysfs_show_32bit_prop(buffer, "mem_banks_count",
672 dev->node_props.mem_banks_count);
673 }
674
675 sysfs_show_32bit_prop(buffer, "caches_count",
676 dev->node_props.caches_count);
677 sysfs_show_32bit_prop(buffer, "io_links_count",
678 dev->node_props.io_links_count);
679 sysfs_show_32bit_prop(buffer, "cpu_core_id_base",
680 dev->node_props.cpu_core_id_base);
681 sysfs_show_32bit_prop(buffer, "simd_id_base",
682 dev->node_props.simd_id_base);
683 sysfs_show_32bit_prop(buffer, "capability",
684 dev->node_props.capability);
685 sysfs_show_32bit_prop(buffer, "max_waves_per_simd",
686 dev->node_props.max_waves_per_simd);
687 sysfs_show_32bit_prop(buffer, "lds_size_in_kb",
688 dev->node_props.lds_size_in_kb);
689 sysfs_show_32bit_prop(buffer, "gds_size_in_kb",
690 dev->node_props.gds_size_in_kb);
691 sysfs_show_32bit_prop(buffer, "wave_front_size",
692 dev->node_props.wave_front_size);
693 sysfs_show_32bit_prop(buffer, "array_count",
694 dev->node_props.array_count);
695 sysfs_show_32bit_prop(buffer, "simd_arrays_per_engine",
696 dev->node_props.simd_arrays_per_engine);
697 sysfs_show_32bit_prop(buffer, "cu_per_simd_array",
698 dev->node_props.cu_per_simd_array);
699 sysfs_show_32bit_prop(buffer, "simd_per_cu",
700 dev->node_props.simd_per_cu);
701 sysfs_show_32bit_prop(buffer, "max_slots_scratch_cu",
702 dev->node_props.max_slots_scratch_cu);
703 sysfs_show_32bit_prop(buffer, "engine_id",
704 dev->node_props.engine_id);
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 sysfs_show_32bit_prop(buffer, "max_engine_clk_fcompute",
714 kfd2kgd->get_max_engine_clock_in_mhz(
715 dev->gpu->kgd));
716 sysfs_show_64bit_prop(buffer, "local_mem_size",
717 kfd2kgd->get_vmem_size(dev->gpu->kgd));
718 }
719
720 ret = sysfs_show_32bit_prop(buffer, "max_engine_clk_ccompute",
721 cpufreq_quick_get_max(0)/1000);
722 }
723
724 return ret;
725}
726
727static const struct sysfs_ops node_ops = {
728 .show = node_show,
729};
730
731static struct kobj_type node_type = {
732 .sysfs_ops = &node_ops,
733};
734
735static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
736{
737 sysfs_remove_file(kobj, attr);
738 kobject_del(kobj);
739 kobject_put(kobj);
740}
741
742static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
743{
744 struct kfd_iolink_properties *iolink;
745 struct kfd_cache_properties *cache;
746 struct kfd_mem_properties *mem;
747
748 BUG_ON(!dev);
749
750 if (dev->kobj_iolink) {
751 list_for_each_entry(iolink, &dev->io_link_props, list)
752 if (iolink->kobj) {
753 kfd_remove_sysfs_file(iolink->kobj,
754 &iolink->attr);
755 iolink->kobj = 0;
756 }
757 kobject_del(dev->kobj_iolink);
758 kobject_put(dev->kobj_iolink);
759 dev->kobj_iolink = 0;
760 }
761
762 if (dev->kobj_cache) {
763 list_for_each_entry(cache, &dev->cache_props, list)
764 if (cache->kobj) {
765 kfd_remove_sysfs_file(cache->kobj,
766 &cache->attr);
767 cache->kobj = 0;
768 }
769 kobject_del(dev->kobj_cache);
770 kobject_put(dev->kobj_cache);
771 dev->kobj_cache = 0;
772 }
773
774 if (dev->kobj_mem) {
775 list_for_each_entry(mem, &dev->mem_props, list)
776 if (mem->kobj) {
777 kfd_remove_sysfs_file(mem->kobj, &mem->attr);
778 mem->kobj = 0;
779 }
780 kobject_del(dev->kobj_mem);
781 kobject_put(dev->kobj_mem);
782 dev->kobj_mem = 0;
783 }
784
785 if (dev->kobj_node) {
786 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
787 sysfs_remove_file(dev->kobj_node, &dev->attr_name);
788 sysfs_remove_file(dev->kobj_node, &dev->attr_props);
789 kobject_del(dev->kobj_node);
790 kobject_put(dev->kobj_node);
791 dev->kobj_node = 0;
792 }
793}
794
795static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
796 uint32_t id)
797{
798 struct kfd_iolink_properties *iolink;
799 struct kfd_cache_properties *cache;
800 struct kfd_mem_properties *mem;
801 int ret;
802 uint32_t i;
803
804 BUG_ON(!dev);
805
806 /*
807 * Creating the sysfs folders
808 */
809 BUG_ON(dev->kobj_node);
810 dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
811 if (!dev->kobj_node)
812 return -ENOMEM;
813
814 ret = kobject_init_and_add(dev->kobj_node, &node_type,
815 sys_props.kobj_nodes, "%d", id);
816 if (ret < 0)
817 return ret;
818
819 dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
820 if (!dev->kobj_mem)
821 return -ENOMEM;
822
823 dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
824 if (!dev->kobj_cache)
825 return -ENOMEM;
826
827 dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
828 if (!dev->kobj_iolink)
829 return -ENOMEM;
830
831 /*
832 * Creating sysfs files for node properties
833 */
834 dev->attr_gpuid.name = "gpu_id";
835 dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
836 sysfs_attr_init(&dev->attr_gpuid);
837 dev->attr_name.name = "name";
838 dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
839 sysfs_attr_init(&dev->attr_name);
840 dev->attr_props.name = "properties";
841 dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
842 sysfs_attr_init(&dev->attr_props);
843 ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
844 if (ret < 0)
845 return ret;
846 ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
847 if (ret < 0)
848 return ret;
849 ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
850 if (ret < 0)
851 return ret;
852
853 i = 0;
854 list_for_each_entry(mem, &dev->mem_props, list) {
855 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
856 if (!mem->kobj)
857 return -ENOMEM;
858 ret = kobject_init_and_add(mem->kobj, &mem_type,
859 dev->kobj_mem, "%d", i);
860 if (ret < 0)
861 return ret;
862
863 mem->attr.name = "properties";
864 mem->attr.mode = KFD_SYSFS_FILE_MODE;
865 sysfs_attr_init(&mem->attr);
866 ret = sysfs_create_file(mem->kobj, &mem->attr);
867 if (ret < 0)
868 return ret;
869 i++;
870 }
871
872 i = 0;
873 list_for_each_entry(cache, &dev->cache_props, list) {
874 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
875 if (!cache->kobj)
876 return -ENOMEM;
877 ret = kobject_init_and_add(cache->kobj, &cache_type,
878 dev->kobj_cache, "%d", i);
879 if (ret < 0)
880 return ret;
881
882 cache->attr.name = "properties";
883 cache->attr.mode = KFD_SYSFS_FILE_MODE;
884 sysfs_attr_init(&cache->attr);
885 ret = sysfs_create_file(cache->kobj, &cache->attr);
886 if (ret < 0)
887 return ret;
888 i++;
889 }
890
891 i = 0;
892 list_for_each_entry(iolink, &dev->io_link_props, list) {
893 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
894 if (!iolink->kobj)
895 return -ENOMEM;
896 ret = kobject_init_and_add(iolink->kobj, &iolink_type,
897 dev->kobj_iolink, "%d", i);
898 if (ret < 0)
899 return ret;
900
901 iolink->attr.name = "properties";
902 iolink->attr.mode = KFD_SYSFS_FILE_MODE;
903 sysfs_attr_init(&iolink->attr);
904 ret = sysfs_create_file(iolink->kobj, &iolink->attr);
905 if (ret < 0)
906 return ret;
907 i++;
908}
909
910 return 0;
911}
912
913static int kfd_build_sysfs_node_tree(void)
914{
915 struct kfd_topology_device *dev;
916 int ret;
917 uint32_t i = 0;
918
919 list_for_each_entry(dev, &topology_device_list, list) {
920 ret = kfd_build_sysfs_node_entry(dev, 0);
921 if (ret < 0)
922 return ret;
923 i++;
924 }
925
926 return 0;
927}
928
929static void kfd_remove_sysfs_node_tree(void)
930{
931 struct kfd_topology_device *dev;
932
933 list_for_each_entry(dev, &topology_device_list, list)
934 kfd_remove_sysfs_node_entry(dev);
935}
936
937static int kfd_topology_update_sysfs(void)
938{
939 int ret;
940
941 pr_info("Creating topology SYSFS entries\n");
942 if (sys_props.kobj_topology == 0) {
943 sys_props.kobj_topology =
944 kfd_alloc_struct(sys_props.kobj_topology);
945 if (!sys_props.kobj_topology)
946 return -ENOMEM;
947
948 ret = kobject_init_and_add(sys_props.kobj_topology,
949 &sysprops_type, &kfd_device->kobj,
950 "topology");
951 if (ret < 0)
952 return ret;
953
954 sys_props.kobj_nodes = kobject_create_and_add("nodes",
955 sys_props.kobj_topology);
956 if (!sys_props.kobj_nodes)
957 return -ENOMEM;
958
959 sys_props.attr_genid.name = "generation_id";
960 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
961 sysfs_attr_init(&sys_props.attr_genid);
962 ret = sysfs_create_file(sys_props.kobj_topology,
963 &sys_props.attr_genid);
964 if (ret < 0)
965 return ret;
966
967 sys_props.attr_props.name = "system_properties";
968 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
969 sysfs_attr_init(&sys_props.attr_props);
970 ret = sysfs_create_file(sys_props.kobj_topology,
971 &sys_props.attr_props);
972 if (ret < 0)
973 return ret;
974 }
975
976 kfd_remove_sysfs_node_tree();
977
978 return kfd_build_sysfs_node_tree();
979}
980
981static void kfd_topology_release_sysfs(void)
982{
983 kfd_remove_sysfs_node_tree();
984 if (sys_props.kobj_topology) {
985 sysfs_remove_file(sys_props.kobj_topology,
986 &sys_props.attr_genid);
987 sysfs_remove_file(sys_props.kobj_topology,
988 &sys_props.attr_props);
989 if (sys_props.kobj_nodes) {
990 kobject_del(sys_props.kobj_nodes);
991 kobject_put(sys_props.kobj_nodes);
992 sys_props.kobj_nodes = 0;
993 }
994 kobject_del(sys_props.kobj_topology);
995 kobject_put(sys_props.kobj_topology);
996 sys_props.kobj_topology = 0;
997 }
998}
999
1000int kfd_topology_init(void)
1001{
1002 void *crat_image = 0;
1003 size_t image_size = 0;
1004 int ret;
1005
1006 /*
1007 * Initialize the head for the topology device list
1008 */
1009 INIT_LIST_HEAD(&topology_device_list);
1010 init_rwsem(&topology_lock);
1011 topology_crat_parsed = 0;
1012
1013 memset(&sys_props, 0, sizeof(sys_props));
1014
1015 /*
1016 * Get the CRAT image from the ACPI
1017 */
1018 ret = kfd_topology_get_crat_acpi(crat_image, &image_size);
1019 if (ret == 0 && image_size > 0) {
1020 pr_info("Found CRAT image with size=%zd\n", image_size);
1021 crat_image = kmalloc(image_size, GFP_KERNEL);
1022 if (!crat_image) {
1023 ret = -ENOMEM;
1024 pr_err("No memory for allocating CRAT image\n");
1025 goto err;
1026 }
1027 ret = kfd_topology_get_crat_acpi(crat_image, &image_size);
1028
1029 if (ret == 0) {
1030 down_write(&topology_lock);
1031 ret = kfd_parse_crat_table(crat_image);
1032 if (ret == 0)
1033 ret = kfd_topology_update_sysfs();
1034 up_write(&topology_lock);
1035 } else {
1036 pr_err("Couldn't get CRAT table size from ACPI\n");
1037 }
1038 kfree(crat_image);
1039 } else if (ret == -ENODATA) {
1040 ret = 0;
1041 } else {
1042 pr_err("Couldn't get CRAT table size from ACPI\n");
1043 }
1044
1045err:
1046 pr_info("Finished initializing topology ret=%d\n", ret);
1047 return ret;
1048}
1049
1050void kfd_topology_shutdown(void)
1051{
1052 kfd_topology_release_sysfs();
1053 kfd_release_live_view();
1054}
1055
1056static void kfd_debug_print_topology(void)
1057{
1058 struct kfd_topology_device *dev;
1059 uint32_t i = 0;
1060
1061 pr_info("DEBUG PRINT OF TOPOLOGY:");
1062 list_for_each_entry(dev, &topology_device_list, list) {
1063 pr_info("Node: %d\n", i);
1064 pr_info("\tGPU assigned: %s\n", (dev->gpu ? "yes" : "no"));
1065 pr_info("\tCPU count: %d\n", dev->node_props.cpu_cores_count);
1066 pr_info("\tSIMD count: %d", dev->node_props.simd_count);
1067 i++;
1068 }
1069}
1070
1071static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
1072{
1073 uint32_t hashout;
1074 uint32_t buf[7];
1075 int i;
1076
1077 if (!gpu)
1078 return 0;
1079
1080 buf[0] = gpu->pdev->devfn;
1081 buf[1] = gpu->pdev->subsystem_vendor;
1082 buf[2] = gpu->pdev->subsystem_device;
1083 buf[3] = gpu->pdev->device;
1084 buf[4] = gpu->pdev->bus->number;
1085 buf[5] = (uint32_t)(kfd2kgd->get_vmem_size(gpu->kgd) & 0xffffffff);
1086 buf[6] = (uint32_t)(kfd2kgd->get_vmem_size(gpu->kgd) >> 32);
1087
1088 for (i = 0, hashout = 0; i < 7; i++)
1089 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1090
1091 return hashout;
1092}
1093
1094static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
1095{
1096 struct kfd_topology_device *dev;
1097 struct kfd_topology_device *out_dev = 0;
1098
1099 BUG_ON(!gpu);
1100
1101 list_for_each_entry(dev, &topology_device_list, list)
1102 if (dev->gpu == 0 && dev->node_props.simd_count > 0) {
1103 dev->gpu = gpu;
1104 out_dev = dev;
1105 break;
1106 }
1107
1108 return out_dev;
1109}
1110
1111static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1112{
1113 /*
1114 * TODO: Generate an event for thunk about the arrival/removal
1115 * of the GPU
1116 */
1117}
1118
1119int kfd_topology_add_device(struct kfd_dev *gpu)
1120{
1121 uint32_t gpu_id;
1122 struct kfd_topology_device *dev;
1123 int res;
1124
1125 BUG_ON(!gpu);
1126
1127 gpu_id = kfd_generate_gpu_id(gpu);
1128
1129 pr_debug("kfd: Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1130
1131 down_write(&topology_lock);
1132 /*
1133 * Try to assign the GPU to existing topology device (generated from
1134 * CRAT table
1135 */
1136 dev = kfd_assign_gpu(gpu);
1137 if (!dev) {
1138 pr_info("GPU was not found in the current topology. Extending.\n");
1139 kfd_debug_print_topology();
1140 dev = kfd_create_topology_device();
1141 if (!dev) {
1142 res = -ENOMEM;
1143 goto err;
1144 }
1145 dev->gpu = gpu;
1146
1147 /*
1148 * TODO: Make a call to retrieve topology information from the
1149 * GPU vBIOS
1150 */
1151
1152 /*
1153 * Update the SYSFS tree, since we added another topology device
1154 */
1155 if (kfd_topology_update_sysfs() < 0)
1156 kfd_topology_release_sysfs();
1157
1158 }
1159
1160 dev->gpu_id = gpu_id;
1161 gpu->id = gpu_id;
1162 dev->node_props.vendor_id = gpu->pdev->vendor;
1163 dev->node_props.device_id = gpu->pdev->device;
1164 dev->node_props.location_id = (gpu->pdev->bus->number << 24) +
1165 (gpu->pdev->devfn & 0xffffff);
1166 /*
1167 * TODO: Retrieve max engine clock values from KGD
1168 */
1169
1170 res = 0;
1171
1172err:
1173 up_write(&topology_lock);
1174
1175 if (res == 0)
1176 kfd_notify_gpu_change(gpu_id, 1);
1177
1178 return res;
1179}
1180
1181int kfd_topology_remove_device(struct kfd_dev *gpu)
1182{
1183 struct kfd_topology_device *dev;
1184 uint32_t gpu_id;
1185 int res = -ENODEV;
1186
1187 BUG_ON(!gpu);
1188
1189 down_write(&topology_lock);
1190
1191 list_for_each_entry(dev, &topology_device_list, list)
1192 if (dev->gpu == gpu) {
1193 gpu_id = dev->gpu_id;
1194 kfd_remove_sysfs_node_entry(dev);
1195 kfd_release_topology_device(dev);
1196 res = 0;
1197 if (kfd_topology_update_sysfs() < 0)
1198 kfd_topology_release_sysfs();
1199 break;
1200 }
1201
1202 up_write(&topology_lock);
1203
1204 if (res == 0)
1205 kfd_notify_gpu_change(gpu_id, 0);
1206
1207 return res;
1208}
1209
1210/*
1211 * When idx is out of bounds, the function will return NULL
1212 */
1213struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx)
1214{
1215
1216 struct kfd_topology_device *top_dev;
1217 struct kfd_dev *device = NULL;
1218 uint8_t device_idx = 0;
1219
1220 down_read(&topology_lock);
1221
1222 list_for_each_entry(top_dev, &topology_device_list, list) {
1223 if (device_idx == idx) {
1224 device = top_dev->gpu;
1225 break;
1226 }
1227
1228 device_idx++;
1229 }
1230
1231 up_read(&topology_lock);
1232
1233 return device;
1234
1235}
Linux 6.x block layer and io_uring tree(s)