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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#include <linux/dmi.h>
32#include <linux/atomic.h>
33
34#include "kfd_priv.h"
35#include "kfd_crat.h"
36#include "kfd_topology.h"
37#include "kfd_device_queue_manager.h"
38#include "kfd_iommu.h"
39#include "amdgpu_amdkfd.h"
40#include "amdgpu_ras.h"
41
42/* topology_device_list - Master list of all topology devices */
43static struct list_head topology_device_list;
44static struct kfd_system_properties sys_props;
45
46static DECLARE_RWSEM(topology_lock);
47static atomic_t topology_crat_proximity_domain;
48
49struct kfd_topology_device *kfd_topology_device_by_proximity_domain(
50 uint32_t proximity_domain)
51{
52 struct kfd_topology_device *top_dev;
53 struct kfd_topology_device *device = NULL;
54
55 down_read(&topology_lock);
56
57 list_for_each_entry(top_dev, &topology_device_list, list)
58 if (top_dev->proximity_domain == proximity_domain) {
59 device = top_dev;
60 break;
61 }
62
63 up_read(&topology_lock);
64
65 return device;
66}
67
68struct kfd_topology_device *kfd_topology_device_by_id(uint32_t gpu_id)
69{
70 struct kfd_topology_device *top_dev = NULL;
71 struct kfd_topology_device *ret = NULL;
72
73 down_read(&topology_lock);
74
75 list_for_each_entry(top_dev, &topology_device_list, list)
76 if (top_dev->gpu_id == gpu_id) {
77 ret = top_dev;
78 break;
79 }
80
81 up_read(&topology_lock);
82
83 return ret;
84}
85
86struct kfd_dev *kfd_device_by_id(uint32_t gpu_id)
87{
88 struct kfd_topology_device *top_dev;
89
90 top_dev = kfd_topology_device_by_id(gpu_id);
91 if (!top_dev)
92 return NULL;
93
94 return top_dev->gpu;
95}
96
97struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
98{
99 struct kfd_topology_device *top_dev;
100 struct kfd_dev *device = NULL;
101
102 down_read(&topology_lock);
103
104 list_for_each_entry(top_dev, &topology_device_list, list)
105 if (top_dev->gpu && top_dev->gpu->pdev == pdev) {
106 device = top_dev->gpu;
107 break;
108 }
109
110 up_read(&topology_lock);
111
112 return device;
113}
114
115struct kfd_dev *kfd_device_by_kgd(const struct kgd_dev *kgd)
116{
117 struct kfd_topology_device *top_dev;
118 struct kfd_dev *device = NULL;
119
120 down_read(&topology_lock);
121
122 list_for_each_entry(top_dev, &topology_device_list, list)
123 if (top_dev->gpu && top_dev->gpu->kgd == kgd) {
124 device = top_dev->gpu;
125 break;
126 }
127
128 up_read(&topology_lock);
129
130 return device;
131}
132
133/* Called with write topology_lock acquired */
134static void kfd_release_topology_device(struct kfd_topology_device *dev)
135{
136 struct kfd_mem_properties *mem;
137 struct kfd_cache_properties *cache;
138 struct kfd_iolink_properties *iolink;
139 struct kfd_perf_properties *perf;
140
141 list_del(&dev->list);
142
143 while (dev->mem_props.next != &dev->mem_props) {
144 mem = container_of(dev->mem_props.next,
145 struct kfd_mem_properties, list);
146 list_del(&mem->list);
147 kfree(mem);
148 }
149
150 while (dev->cache_props.next != &dev->cache_props) {
151 cache = container_of(dev->cache_props.next,
152 struct kfd_cache_properties, list);
153 list_del(&cache->list);
154 kfree(cache);
155 }
156
157 while (dev->io_link_props.next != &dev->io_link_props) {
158 iolink = container_of(dev->io_link_props.next,
159 struct kfd_iolink_properties, list);
160 list_del(&iolink->list);
161 kfree(iolink);
162 }
163
164 while (dev->perf_props.next != &dev->perf_props) {
165 perf = container_of(dev->perf_props.next,
166 struct kfd_perf_properties, list);
167 list_del(&perf->list);
168 kfree(perf);
169 }
170
171 kfree(dev);
172}
173
174void kfd_release_topology_device_list(struct list_head *device_list)
175{
176 struct kfd_topology_device *dev;
177
178 while (!list_empty(device_list)) {
179 dev = list_first_entry(device_list,
180 struct kfd_topology_device, list);
181 kfd_release_topology_device(dev);
182 }
183}
184
185static void kfd_release_live_view(void)
186{
187 kfd_release_topology_device_list(&topology_device_list);
188 memset(&sys_props, 0, sizeof(sys_props));
189}
190
191struct kfd_topology_device *kfd_create_topology_device(
192 struct list_head *device_list)
193{
194 struct kfd_topology_device *dev;
195
196 dev = kfd_alloc_struct(dev);
197 if (!dev) {
198 pr_err("No memory to allocate a topology device");
199 return NULL;
200 }
201
202 INIT_LIST_HEAD(&dev->mem_props);
203 INIT_LIST_HEAD(&dev->cache_props);
204 INIT_LIST_HEAD(&dev->io_link_props);
205 INIT_LIST_HEAD(&dev->perf_props);
206
207 list_add_tail(&dev->list, device_list);
208
209 return dev;
210}
211
212
213#define sysfs_show_gen_prop(buffer, offs, fmt, ...) \
214 (offs += snprintf(buffer+offs, PAGE_SIZE-offs, \
215 fmt, __VA_ARGS__))
216#define sysfs_show_32bit_prop(buffer, offs, name, value) \
217 sysfs_show_gen_prop(buffer, offs, "%s %u\n", name, value)
218#define sysfs_show_64bit_prop(buffer, offs, name, value) \
219 sysfs_show_gen_prop(buffer, offs, "%s %llu\n", name, value)
220#define sysfs_show_32bit_val(buffer, offs, value) \
221 sysfs_show_gen_prop(buffer, offs, "%u\n", value)
222#define sysfs_show_str_val(buffer, offs, value) \
223 sysfs_show_gen_prop(buffer, offs, "%s\n", value)
224
225static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
226 char *buffer)
227{
228 int offs = 0;
229
230 /* Making sure that the buffer is an empty string */
231 buffer[0] = 0;
232
233 if (attr == &sys_props.attr_genid) {
234 sysfs_show_32bit_val(buffer, offs,
235 sys_props.generation_count);
236 } else if (attr == &sys_props.attr_props) {
237 sysfs_show_64bit_prop(buffer, offs, "platform_oem",
238 sys_props.platform_oem);
239 sysfs_show_64bit_prop(buffer, offs, "platform_id",
240 sys_props.platform_id);
241 sysfs_show_64bit_prop(buffer, offs, "platform_rev",
242 sys_props.platform_rev);
243 } else {
244 offs = -EINVAL;
245 }
246
247 return offs;
248}
249
250static void kfd_topology_kobj_release(struct kobject *kobj)
251{
252 kfree(kobj);
253}
254
255static const struct sysfs_ops sysprops_ops = {
256 .show = sysprops_show,
257};
258
259static struct kobj_type sysprops_type = {
260 .release = kfd_topology_kobj_release,
261 .sysfs_ops = &sysprops_ops,
262};
263
264static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
265 char *buffer)
266{
267 int offs = 0;
268 struct kfd_iolink_properties *iolink;
269
270 /* Making sure that the buffer is an empty string */
271 buffer[0] = 0;
272
273 iolink = container_of(attr, struct kfd_iolink_properties, attr);
274 if (iolink->gpu && kfd_devcgroup_check_permission(iolink->gpu))
275 return -EPERM;
276 sysfs_show_32bit_prop(buffer, offs, "type", iolink->iolink_type);
277 sysfs_show_32bit_prop(buffer, offs, "version_major", iolink->ver_maj);
278 sysfs_show_32bit_prop(buffer, offs, "version_minor", iolink->ver_min);
279 sysfs_show_32bit_prop(buffer, offs, "node_from", iolink->node_from);
280 sysfs_show_32bit_prop(buffer, offs, "node_to", iolink->node_to);
281 sysfs_show_32bit_prop(buffer, offs, "weight", iolink->weight);
282 sysfs_show_32bit_prop(buffer, offs, "min_latency", iolink->min_latency);
283 sysfs_show_32bit_prop(buffer, offs, "max_latency", iolink->max_latency);
284 sysfs_show_32bit_prop(buffer, offs, "min_bandwidth",
285 iolink->min_bandwidth);
286 sysfs_show_32bit_prop(buffer, offs, "max_bandwidth",
287 iolink->max_bandwidth);
288 sysfs_show_32bit_prop(buffer, offs, "recommended_transfer_size",
289 iolink->rec_transfer_size);
290 sysfs_show_32bit_prop(buffer, offs, "flags", iolink->flags);
291
292 return offs;
293}
294
295static const struct sysfs_ops iolink_ops = {
296 .show = iolink_show,
297};
298
299static struct kobj_type iolink_type = {
300 .release = kfd_topology_kobj_release,
301 .sysfs_ops = &iolink_ops,
302};
303
304static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
305 char *buffer)
306{
307 int offs = 0;
308 struct kfd_mem_properties *mem;
309
310 /* Making sure that the buffer is an empty string */
311 buffer[0] = 0;
312
313 mem = container_of(attr, struct kfd_mem_properties, attr);
314 if (mem->gpu && kfd_devcgroup_check_permission(mem->gpu))
315 return -EPERM;
316 sysfs_show_32bit_prop(buffer, offs, "heap_type", mem->heap_type);
317 sysfs_show_64bit_prop(buffer, offs, "size_in_bytes",
318 mem->size_in_bytes);
319 sysfs_show_32bit_prop(buffer, offs, "flags", mem->flags);
320 sysfs_show_32bit_prop(buffer, offs, "width", mem->width);
321 sysfs_show_32bit_prop(buffer, offs, "mem_clk_max",
322 mem->mem_clk_max);
323
324 return offs;
325}
326
327static const struct sysfs_ops mem_ops = {
328 .show = mem_show,
329};
330
331static struct kobj_type mem_type = {
332 .release = kfd_topology_kobj_release,
333 .sysfs_ops = &mem_ops,
334};
335
336static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
337 char *buffer)
338{
339 int offs = 0;
340 uint32_t i, j;
341 struct kfd_cache_properties *cache;
342
343 /* Making sure that the buffer is an empty string */
344 buffer[0] = 0;
345
346 cache = container_of(attr, struct kfd_cache_properties, attr);
347 if (cache->gpu && kfd_devcgroup_check_permission(cache->gpu))
348 return -EPERM;
349 sysfs_show_32bit_prop(buffer, offs, "processor_id_low",
350 cache->processor_id_low);
351 sysfs_show_32bit_prop(buffer, offs, "level", cache->cache_level);
352 sysfs_show_32bit_prop(buffer, offs, "size", cache->cache_size);
353 sysfs_show_32bit_prop(buffer, offs, "cache_line_size",
354 cache->cacheline_size);
355 sysfs_show_32bit_prop(buffer, offs, "cache_lines_per_tag",
356 cache->cachelines_per_tag);
357 sysfs_show_32bit_prop(buffer, offs, "association", cache->cache_assoc);
358 sysfs_show_32bit_prop(buffer, offs, "latency", cache->cache_latency);
359 sysfs_show_32bit_prop(buffer, offs, "type", cache->cache_type);
360 offs += snprintf(buffer+offs, PAGE_SIZE-offs, "sibling_map ");
361 for (i = 0; i < CRAT_SIBLINGMAP_SIZE; i++)
362 for (j = 0; j < sizeof(cache->sibling_map[0])*8; j++)
363 /* Check each bit */
364 offs += snprintf(buffer+offs, PAGE_SIZE-offs, "%d,",
365 (cache->sibling_map[i] >> j) & 1);
366
367 /* Replace the last "," with end of line */
368 buffer[offs-1] = '\n';
369 return offs;
370}
371
372static const struct sysfs_ops cache_ops = {
373 .show = kfd_cache_show,
374};
375
376static struct kobj_type cache_type = {
377 .release = kfd_topology_kobj_release,
378 .sysfs_ops = &cache_ops,
379};
380
381/****** Sysfs of Performance Counters ******/
382
383struct kfd_perf_attr {
384 struct kobj_attribute attr;
385 uint32_t data;
386};
387
388static ssize_t perf_show(struct kobject *kobj, struct kobj_attribute *attrs,
389 char *buf)
390{
391 int offs = 0;
392 struct kfd_perf_attr *attr;
393
394 buf[0] = 0;
395 attr = container_of(attrs, struct kfd_perf_attr, attr);
396 if (!attr->data) /* invalid data for PMC */
397 return 0;
398 else
399 return sysfs_show_32bit_val(buf, offs, attr->data);
400}
401
402#define KFD_PERF_DESC(_name, _data) \
403{ \
404 .attr = __ATTR(_name, 0444, perf_show, NULL), \
405 .data = _data, \
406}
407
408static struct kfd_perf_attr perf_attr_iommu[] = {
409 KFD_PERF_DESC(max_concurrent, 0),
410 KFD_PERF_DESC(num_counters, 0),
411 KFD_PERF_DESC(counter_ids, 0),
412};
413/****************************************/
414
415static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
416 char *buffer)
417{
418 int offs = 0;
419 struct kfd_topology_device *dev;
420 uint32_t log_max_watch_addr;
421
422 /* Making sure that the buffer is an empty string */
423 buffer[0] = 0;
424
425 if (strcmp(attr->name, "gpu_id") == 0) {
426 dev = container_of(attr, struct kfd_topology_device,
427 attr_gpuid);
428 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
429 return -EPERM;
430 return sysfs_show_32bit_val(buffer, offs, dev->gpu_id);
431 }
432
433 if (strcmp(attr->name, "name") == 0) {
434 dev = container_of(attr, struct kfd_topology_device,
435 attr_name);
436
437 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
438 return -EPERM;
439 return sysfs_show_str_val(buffer, offs, dev->node_props.name);
440 }
441
442 dev = container_of(attr, struct kfd_topology_device,
443 attr_props);
444 if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
445 return -EPERM;
446 sysfs_show_32bit_prop(buffer, offs, "cpu_cores_count",
447 dev->node_props.cpu_cores_count);
448 sysfs_show_32bit_prop(buffer, offs, "simd_count",
449 dev->node_props.simd_count);
450 sysfs_show_32bit_prop(buffer, offs, "mem_banks_count",
451 dev->node_props.mem_banks_count);
452 sysfs_show_32bit_prop(buffer, offs, "caches_count",
453 dev->node_props.caches_count);
454 sysfs_show_32bit_prop(buffer, offs, "io_links_count",
455 dev->node_props.io_links_count);
456 sysfs_show_32bit_prop(buffer, offs, "cpu_core_id_base",
457 dev->node_props.cpu_core_id_base);
458 sysfs_show_32bit_prop(buffer, offs, "simd_id_base",
459 dev->node_props.simd_id_base);
460 sysfs_show_32bit_prop(buffer, offs, "max_waves_per_simd",
461 dev->node_props.max_waves_per_simd);
462 sysfs_show_32bit_prop(buffer, offs, "lds_size_in_kb",
463 dev->node_props.lds_size_in_kb);
464 sysfs_show_32bit_prop(buffer, offs, "gds_size_in_kb",
465 dev->node_props.gds_size_in_kb);
466 sysfs_show_32bit_prop(buffer, offs, "num_gws",
467 dev->node_props.num_gws);
468 sysfs_show_32bit_prop(buffer, offs, "wave_front_size",
469 dev->node_props.wave_front_size);
470 sysfs_show_32bit_prop(buffer, offs, "array_count",
471 dev->node_props.array_count);
472 sysfs_show_32bit_prop(buffer, offs, "simd_arrays_per_engine",
473 dev->node_props.simd_arrays_per_engine);
474 sysfs_show_32bit_prop(buffer, offs, "cu_per_simd_array",
475 dev->node_props.cu_per_simd_array);
476 sysfs_show_32bit_prop(buffer, offs, "simd_per_cu",
477 dev->node_props.simd_per_cu);
478 sysfs_show_32bit_prop(buffer, offs, "max_slots_scratch_cu",
479 dev->node_props.max_slots_scratch_cu);
480 sysfs_show_32bit_prop(buffer, offs, "vendor_id",
481 dev->node_props.vendor_id);
482 sysfs_show_32bit_prop(buffer, offs, "device_id",
483 dev->node_props.device_id);
484 sysfs_show_32bit_prop(buffer, offs, "location_id",
485 dev->node_props.location_id);
486 sysfs_show_32bit_prop(buffer, offs, "domain",
487 dev->node_props.domain);
488 sysfs_show_32bit_prop(buffer, offs, "drm_render_minor",
489 dev->node_props.drm_render_minor);
490 sysfs_show_64bit_prop(buffer, offs, "hive_id",
491 dev->node_props.hive_id);
492 sysfs_show_32bit_prop(buffer, offs, "num_sdma_engines",
493 dev->node_props.num_sdma_engines);
494 sysfs_show_32bit_prop(buffer, offs, "num_sdma_xgmi_engines",
495 dev->node_props.num_sdma_xgmi_engines);
496 sysfs_show_32bit_prop(buffer, offs, "num_sdma_queues_per_engine",
497 dev->node_props.num_sdma_queues_per_engine);
498 sysfs_show_32bit_prop(buffer, offs, "num_cp_queues",
499 dev->node_props.num_cp_queues);
500 sysfs_show_64bit_prop(buffer, offs, "unique_id",
501 dev->node_props.unique_id);
502
503 if (dev->gpu) {
504 log_max_watch_addr =
505 __ilog2_u32(dev->gpu->device_info->num_of_watch_points);
506
507 if (log_max_watch_addr) {
508 dev->node_props.capability |=
509 HSA_CAP_WATCH_POINTS_SUPPORTED;
510
511 dev->node_props.capability |=
512 ((log_max_watch_addr <<
513 HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) &
514 HSA_CAP_WATCH_POINTS_TOTALBITS_MASK);
515 }
516
517 if (dev->gpu->device_info->asic_family == CHIP_TONGA)
518 dev->node_props.capability |=
519 HSA_CAP_AQL_QUEUE_DOUBLE_MAP;
520
521 sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_fcompute",
522 dev->node_props.max_engine_clk_fcompute);
523
524 sysfs_show_64bit_prop(buffer, offs, "local_mem_size", 0ULL);
525
526 sysfs_show_32bit_prop(buffer, offs, "fw_version",
527 dev->gpu->mec_fw_version);
528 sysfs_show_32bit_prop(buffer, offs, "capability",
529 dev->node_props.capability);
530 sysfs_show_32bit_prop(buffer, offs, "sdma_fw_version",
531 dev->gpu->sdma_fw_version);
532 }
533
534 return sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_ccompute",
535 cpufreq_quick_get_max(0)/1000);
536}
537
538static const struct sysfs_ops node_ops = {
539 .show = node_show,
540};
541
542static struct kobj_type node_type = {
543 .release = kfd_topology_kobj_release,
544 .sysfs_ops = &node_ops,
545};
546
547static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
548{
549 sysfs_remove_file(kobj, attr);
550 kobject_del(kobj);
551 kobject_put(kobj);
552}
553
554static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
555{
556 struct kfd_iolink_properties *iolink;
557 struct kfd_cache_properties *cache;
558 struct kfd_mem_properties *mem;
559 struct kfd_perf_properties *perf;
560
561 if (dev->kobj_iolink) {
562 list_for_each_entry(iolink, &dev->io_link_props, list)
563 if (iolink->kobj) {
564 kfd_remove_sysfs_file(iolink->kobj,
565 &iolink->attr);
566 iolink->kobj = NULL;
567 }
568 kobject_del(dev->kobj_iolink);
569 kobject_put(dev->kobj_iolink);
570 dev->kobj_iolink = NULL;
571 }
572
573 if (dev->kobj_cache) {
574 list_for_each_entry(cache, &dev->cache_props, list)
575 if (cache->kobj) {
576 kfd_remove_sysfs_file(cache->kobj,
577 &cache->attr);
578 cache->kobj = NULL;
579 }
580 kobject_del(dev->kobj_cache);
581 kobject_put(dev->kobj_cache);
582 dev->kobj_cache = NULL;
583 }
584
585 if (dev->kobj_mem) {
586 list_for_each_entry(mem, &dev->mem_props, list)
587 if (mem->kobj) {
588 kfd_remove_sysfs_file(mem->kobj, &mem->attr);
589 mem->kobj = NULL;
590 }
591 kobject_del(dev->kobj_mem);
592 kobject_put(dev->kobj_mem);
593 dev->kobj_mem = NULL;
594 }
595
596 if (dev->kobj_perf) {
597 list_for_each_entry(perf, &dev->perf_props, list) {
598 kfree(perf->attr_group);
599 perf->attr_group = NULL;
600 }
601 kobject_del(dev->kobj_perf);
602 kobject_put(dev->kobj_perf);
603 dev->kobj_perf = NULL;
604 }
605
606 if (dev->kobj_node) {
607 sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
608 sysfs_remove_file(dev->kobj_node, &dev->attr_name);
609 sysfs_remove_file(dev->kobj_node, &dev->attr_props);
610 kobject_del(dev->kobj_node);
611 kobject_put(dev->kobj_node);
612 dev->kobj_node = NULL;
613 }
614}
615
616static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
617 uint32_t id)
618{
619 struct kfd_iolink_properties *iolink;
620 struct kfd_cache_properties *cache;
621 struct kfd_mem_properties *mem;
622 struct kfd_perf_properties *perf;
623 int ret;
624 uint32_t i, num_attrs;
625 struct attribute **attrs;
626
627 if (WARN_ON(dev->kobj_node))
628 return -EEXIST;
629
630 /*
631 * Creating the sysfs folders
632 */
633 dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
634 if (!dev->kobj_node)
635 return -ENOMEM;
636
637 ret = kobject_init_and_add(dev->kobj_node, &node_type,
638 sys_props.kobj_nodes, "%d", id);
639 if (ret < 0) {
640 kobject_put(dev->kobj_node);
641 return ret;
642 }
643
644 dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
645 if (!dev->kobj_mem)
646 return -ENOMEM;
647
648 dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
649 if (!dev->kobj_cache)
650 return -ENOMEM;
651
652 dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
653 if (!dev->kobj_iolink)
654 return -ENOMEM;
655
656 dev->kobj_perf = kobject_create_and_add("perf", dev->kobj_node);
657 if (!dev->kobj_perf)
658 return -ENOMEM;
659
660 /*
661 * Creating sysfs files for node properties
662 */
663 dev->attr_gpuid.name = "gpu_id";
664 dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
665 sysfs_attr_init(&dev->attr_gpuid);
666 dev->attr_name.name = "name";
667 dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
668 sysfs_attr_init(&dev->attr_name);
669 dev->attr_props.name = "properties";
670 dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
671 sysfs_attr_init(&dev->attr_props);
672 ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
673 if (ret < 0)
674 return ret;
675 ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
676 if (ret < 0)
677 return ret;
678 ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
679 if (ret < 0)
680 return ret;
681
682 i = 0;
683 list_for_each_entry(mem, &dev->mem_props, list) {
684 mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
685 if (!mem->kobj)
686 return -ENOMEM;
687 ret = kobject_init_and_add(mem->kobj, &mem_type,
688 dev->kobj_mem, "%d", i);
689 if (ret < 0) {
690 kobject_put(mem->kobj);
691 return ret;
692 }
693
694 mem->attr.name = "properties";
695 mem->attr.mode = KFD_SYSFS_FILE_MODE;
696 sysfs_attr_init(&mem->attr);
697 ret = sysfs_create_file(mem->kobj, &mem->attr);
698 if (ret < 0)
699 return ret;
700 i++;
701 }
702
703 i = 0;
704 list_for_each_entry(cache, &dev->cache_props, list) {
705 cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
706 if (!cache->kobj)
707 return -ENOMEM;
708 ret = kobject_init_and_add(cache->kobj, &cache_type,
709 dev->kobj_cache, "%d", i);
710 if (ret < 0) {
711 kobject_put(cache->kobj);
712 return ret;
713 }
714
715 cache->attr.name = "properties";
716 cache->attr.mode = KFD_SYSFS_FILE_MODE;
717 sysfs_attr_init(&cache->attr);
718 ret = sysfs_create_file(cache->kobj, &cache->attr);
719 if (ret < 0)
720 return ret;
721 i++;
722 }
723
724 i = 0;
725 list_for_each_entry(iolink, &dev->io_link_props, list) {
726 iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
727 if (!iolink->kobj)
728 return -ENOMEM;
729 ret = kobject_init_and_add(iolink->kobj, &iolink_type,
730 dev->kobj_iolink, "%d", i);
731 if (ret < 0) {
732 kobject_put(iolink->kobj);
733 return ret;
734 }
735
736 iolink->attr.name = "properties";
737 iolink->attr.mode = KFD_SYSFS_FILE_MODE;
738 sysfs_attr_init(&iolink->attr);
739 ret = sysfs_create_file(iolink->kobj, &iolink->attr);
740 if (ret < 0)
741 return ret;
742 i++;
743 }
744
745 /* All hardware blocks have the same number of attributes. */
746 num_attrs = ARRAY_SIZE(perf_attr_iommu);
747 list_for_each_entry(perf, &dev->perf_props, list) {
748 perf->attr_group = kzalloc(sizeof(struct kfd_perf_attr)
749 * num_attrs + sizeof(struct attribute_group),
750 GFP_KERNEL);
751 if (!perf->attr_group)
752 return -ENOMEM;
753
754 attrs = (struct attribute **)(perf->attr_group + 1);
755 if (!strcmp(perf->block_name, "iommu")) {
756 /* Information of IOMMU's num_counters and counter_ids is shown
757 * under /sys/bus/event_source/devices/amd_iommu. We don't
758 * duplicate here.
759 */
760 perf_attr_iommu[0].data = perf->max_concurrent;
761 for (i = 0; i < num_attrs; i++)
762 attrs[i] = &perf_attr_iommu[i].attr.attr;
763 }
764 perf->attr_group->name = perf->block_name;
765 perf->attr_group->attrs = attrs;
766 ret = sysfs_create_group(dev->kobj_perf, perf->attr_group);
767 if (ret < 0)
768 return ret;
769 }
770
771 return 0;
772}
773
774/* Called with write topology lock acquired */
775static int kfd_build_sysfs_node_tree(void)
776{
777 struct kfd_topology_device *dev;
778 int ret;
779 uint32_t i = 0;
780
781 list_for_each_entry(dev, &topology_device_list, list) {
782 ret = kfd_build_sysfs_node_entry(dev, i);
783 if (ret < 0)
784 return ret;
785 i++;
786 }
787
788 return 0;
789}
790
791/* Called with write topology lock acquired */
792static void kfd_remove_sysfs_node_tree(void)
793{
794 struct kfd_topology_device *dev;
795
796 list_for_each_entry(dev, &topology_device_list, list)
797 kfd_remove_sysfs_node_entry(dev);
798}
799
800static int kfd_topology_update_sysfs(void)
801{
802 int ret;
803
804 if (!sys_props.kobj_topology) {
805 sys_props.kobj_topology =
806 kfd_alloc_struct(sys_props.kobj_topology);
807 if (!sys_props.kobj_topology)
808 return -ENOMEM;
809
810 ret = kobject_init_and_add(sys_props.kobj_topology,
811 &sysprops_type, &kfd_device->kobj,
812 "topology");
813 if (ret < 0) {
814 kobject_put(sys_props.kobj_topology);
815 return ret;
816 }
817
818 sys_props.kobj_nodes = kobject_create_and_add("nodes",
819 sys_props.kobj_topology);
820 if (!sys_props.kobj_nodes)
821 return -ENOMEM;
822
823 sys_props.attr_genid.name = "generation_id";
824 sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
825 sysfs_attr_init(&sys_props.attr_genid);
826 ret = sysfs_create_file(sys_props.kobj_topology,
827 &sys_props.attr_genid);
828 if (ret < 0)
829 return ret;
830
831 sys_props.attr_props.name = "system_properties";
832 sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
833 sysfs_attr_init(&sys_props.attr_props);
834 ret = sysfs_create_file(sys_props.kobj_topology,
835 &sys_props.attr_props);
836 if (ret < 0)
837 return ret;
838 }
839
840 kfd_remove_sysfs_node_tree();
841
842 return kfd_build_sysfs_node_tree();
843}
844
845static void kfd_topology_release_sysfs(void)
846{
847 kfd_remove_sysfs_node_tree();
848 if (sys_props.kobj_topology) {
849 sysfs_remove_file(sys_props.kobj_topology,
850 &sys_props.attr_genid);
851 sysfs_remove_file(sys_props.kobj_topology,
852 &sys_props.attr_props);
853 if (sys_props.kobj_nodes) {
854 kobject_del(sys_props.kobj_nodes);
855 kobject_put(sys_props.kobj_nodes);
856 sys_props.kobj_nodes = NULL;
857 }
858 kobject_del(sys_props.kobj_topology);
859 kobject_put(sys_props.kobj_topology);
860 sys_props.kobj_topology = NULL;
861 }
862}
863
864/* Called with write topology_lock acquired */
865static void kfd_topology_update_device_list(struct list_head *temp_list,
866 struct list_head *master_list)
867{
868 while (!list_empty(temp_list)) {
869 list_move_tail(temp_list->next, master_list);
870 sys_props.num_devices++;
871 }
872}
873
874static void kfd_debug_print_topology(void)
875{
876 struct kfd_topology_device *dev;
877
878 down_read(&topology_lock);
879
880 dev = list_last_entry(&topology_device_list,
881 struct kfd_topology_device, list);
882 if (dev) {
883 if (dev->node_props.cpu_cores_count &&
884 dev->node_props.simd_count) {
885 pr_info("Topology: Add APU node [0x%0x:0x%0x]\n",
886 dev->node_props.device_id,
887 dev->node_props.vendor_id);
888 } else if (dev->node_props.cpu_cores_count)
889 pr_info("Topology: Add CPU node\n");
890 else if (dev->node_props.simd_count)
891 pr_info("Topology: Add dGPU node [0x%0x:0x%0x]\n",
892 dev->node_props.device_id,
893 dev->node_props.vendor_id);
894 }
895 up_read(&topology_lock);
896}
897
898/* Helper function for intializing platform_xx members of
899 * kfd_system_properties. Uses OEM info from the last CPU/APU node.
900 */
901static void kfd_update_system_properties(void)
902{
903 struct kfd_topology_device *dev;
904
905 down_read(&topology_lock);
906 dev = list_last_entry(&topology_device_list,
907 struct kfd_topology_device, list);
908 if (dev) {
909 sys_props.platform_id =
910 (*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK;
911 sys_props.platform_oem = *((uint64_t *)dev->oem_table_id);
912 sys_props.platform_rev = dev->oem_revision;
913 }
914 up_read(&topology_lock);
915}
916
917static void find_system_memory(const struct dmi_header *dm,
918 void *private)
919{
920 struct kfd_mem_properties *mem;
921 u16 mem_width, mem_clock;
922 struct kfd_topology_device *kdev =
923 (struct kfd_topology_device *)private;
924 const u8 *dmi_data = (const u8 *)(dm + 1);
925
926 if (dm->type == DMI_ENTRY_MEM_DEVICE && dm->length >= 0x15) {
927 mem_width = (u16)(*(const u16 *)(dmi_data + 0x6));
928 mem_clock = (u16)(*(const u16 *)(dmi_data + 0x11));
929 list_for_each_entry(mem, &kdev->mem_props, list) {
930 if (mem_width != 0xFFFF && mem_width != 0)
931 mem->width = mem_width;
932 if (mem_clock != 0)
933 mem->mem_clk_max = mem_clock;
934 }
935 }
936}
937
938/*
939 * Performance counters information is not part of CRAT but we would like to
940 * put them in the sysfs under topology directory for Thunk to get the data.
941 * This function is called before updating the sysfs.
942 */
943static int kfd_add_perf_to_topology(struct kfd_topology_device *kdev)
944{
945 /* These are the only counters supported so far */
946 return kfd_iommu_add_perf_counters(kdev);
947}
948
949/* kfd_add_non_crat_information - Add information that is not currently
950 * defined in CRAT but is necessary for KFD topology
951 * @dev - topology device to which addition info is added
952 */
953static void kfd_add_non_crat_information(struct kfd_topology_device *kdev)
954{
955 /* Check if CPU only node. */
956 if (!kdev->gpu) {
957 /* Add system memory information */
958 dmi_walk(find_system_memory, kdev);
959 }
960 /* TODO: For GPU node, rearrange code from kfd_topology_add_device */
961}
962
963/* kfd_is_acpi_crat_invalid - CRAT from ACPI is valid only for AMD APU devices.
964 * Ignore CRAT for all other devices. AMD APU is identified if both CPU
965 * and GPU cores are present.
966 * @device_list - topology device list created by parsing ACPI CRAT table.
967 * @return - TRUE if invalid, FALSE is valid.
968 */
969static bool kfd_is_acpi_crat_invalid(struct list_head *device_list)
970{
971 struct kfd_topology_device *dev;
972
973 list_for_each_entry(dev, device_list, list) {
974 if (dev->node_props.cpu_cores_count &&
975 dev->node_props.simd_count)
976 return false;
977 }
978 pr_info("Ignoring ACPI CRAT on non-APU system\n");
979 return true;
980}
981
982int kfd_topology_init(void)
983{
984 void *crat_image = NULL;
985 size_t image_size = 0;
986 int ret;
987 struct list_head temp_topology_device_list;
988 int cpu_only_node = 0;
989 struct kfd_topology_device *kdev;
990 int proximity_domain;
991
992 /* topology_device_list - Master list of all topology devices
993 * temp_topology_device_list - temporary list created while parsing CRAT
994 * or VCRAT. Once parsing is complete the contents of list is moved to
995 * topology_device_list
996 */
997
998 /* Initialize the head for the both the lists */
999 INIT_LIST_HEAD(&topology_device_list);
1000 INIT_LIST_HEAD(&temp_topology_device_list);
1001 init_rwsem(&topology_lock);
1002
1003 memset(&sys_props, 0, sizeof(sys_props));
1004
1005 /* Proximity domains in ACPI CRAT tables start counting at
1006 * 0. The same should be true for virtual CRAT tables created
1007 * at this stage. GPUs added later in kfd_topology_add_device
1008 * use a counter.
1009 */
1010 proximity_domain = 0;
1011
1012 /*
1013 * Get the CRAT image from the ACPI. If ACPI doesn't have one
1014 * or if ACPI CRAT is invalid create a virtual CRAT.
1015 * NOTE: The current implementation expects all AMD APUs to have
1016 * CRAT. If no CRAT is available, it is assumed to be a CPU
1017 */
1018 ret = kfd_create_crat_image_acpi(&crat_image, &image_size);
1019 if (!ret) {
1020 ret = kfd_parse_crat_table(crat_image,
1021 &temp_topology_device_list,
1022 proximity_domain);
1023 if (ret ||
1024 kfd_is_acpi_crat_invalid(&temp_topology_device_list)) {
1025 kfd_release_topology_device_list(
1026 &temp_topology_device_list);
1027 kfd_destroy_crat_image(crat_image);
1028 crat_image = NULL;
1029 }
1030 }
1031
1032 if (!crat_image) {
1033 ret = kfd_create_crat_image_virtual(&crat_image, &image_size,
1034 COMPUTE_UNIT_CPU, NULL,
1035 proximity_domain);
1036 cpu_only_node = 1;
1037 if (ret) {
1038 pr_err("Error creating VCRAT table for CPU\n");
1039 return ret;
1040 }
1041
1042 ret = kfd_parse_crat_table(crat_image,
1043 &temp_topology_device_list,
1044 proximity_domain);
1045 if (ret) {
1046 pr_err("Error parsing VCRAT table for CPU\n");
1047 goto err;
1048 }
1049 }
1050
1051 kdev = list_first_entry(&temp_topology_device_list,
1052 struct kfd_topology_device, list);
1053 kfd_add_perf_to_topology(kdev);
1054
1055 down_write(&topology_lock);
1056 kfd_topology_update_device_list(&temp_topology_device_list,
1057 &topology_device_list);
1058 atomic_set(&topology_crat_proximity_domain, sys_props.num_devices-1);
1059 ret = kfd_topology_update_sysfs();
1060 up_write(&topology_lock);
1061
1062 if (!ret) {
1063 sys_props.generation_count++;
1064 kfd_update_system_properties();
1065 kfd_debug_print_topology();
1066 } else
1067 pr_err("Failed to update topology in sysfs ret=%d\n", ret);
1068
1069 /* For nodes with GPU, this information gets added
1070 * when GPU is detected (kfd_topology_add_device).
1071 */
1072 if (cpu_only_node) {
1073 /* Add additional information to CPU only node created above */
1074 down_write(&topology_lock);
1075 kdev = list_first_entry(&topology_device_list,
1076 struct kfd_topology_device, list);
1077 up_write(&topology_lock);
1078 kfd_add_non_crat_information(kdev);
1079 }
1080
1081err:
1082 kfd_destroy_crat_image(crat_image);
1083 return ret;
1084}
1085
1086void kfd_topology_shutdown(void)
1087{
1088 down_write(&topology_lock);
1089 kfd_topology_release_sysfs();
1090 kfd_release_live_view();
1091 up_write(&topology_lock);
1092}
1093
1094static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
1095{
1096 uint32_t hashout;
1097 uint32_t buf[7];
1098 uint64_t local_mem_size;
1099 int i;
1100 struct kfd_local_mem_info local_mem_info;
1101
1102 if (!gpu)
1103 return 0;
1104
1105 amdgpu_amdkfd_get_local_mem_info(gpu->kgd, &local_mem_info);
1106
1107 local_mem_size = local_mem_info.local_mem_size_private +
1108 local_mem_info.local_mem_size_public;
1109
1110 buf[0] = gpu->pdev->devfn;
1111 buf[1] = gpu->pdev->subsystem_vendor |
1112 (gpu->pdev->subsystem_device << 16);
1113 buf[2] = pci_domain_nr(gpu->pdev->bus);
1114 buf[3] = gpu->pdev->device;
1115 buf[4] = gpu->pdev->bus->number;
1116 buf[5] = lower_32_bits(local_mem_size);
1117 buf[6] = upper_32_bits(local_mem_size);
1118
1119 for (i = 0, hashout = 0; i < 7; i++)
1120 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1121
1122 return hashout;
1123}
1124/* kfd_assign_gpu - Attach @gpu to the correct kfd topology device. If
1125 * the GPU device is not already present in the topology device
1126 * list then return NULL. This means a new topology device has to
1127 * be created for this GPU.
1128 */
1129static struct kfd_topology_device *kfd_assign_gpu(struct kfd_dev *gpu)
1130{
1131 struct kfd_topology_device *dev;
1132 struct kfd_topology_device *out_dev = NULL;
1133 struct kfd_mem_properties *mem;
1134 struct kfd_cache_properties *cache;
1135 struct kfd_iolink_properties *iolink;
1136
1137 down_write(&topology_lock);
1138 list_for_each_entry(dev, &topology_device_list, list) {
1139 /* Discrete GPUs need their own topology device list
1140 * entries. Don't assign them to CPU/APU nodes.
1141 */
1142 if (!gpu->device_info->needs_iommu_device &&
1143 dev->node_props.cpu_cores_count)
1144 continue;
1145
1146 if (!dev->gpu && (dev->node_props.simd_count > 0)) {
1147 dev->gpu = gpu;
1148 out_dev = dev;
1149
1150 list_for_each_entry(mem, &dev->mem_props, list)
1151 mem->gpu = dev->gpu;
1152 list_for_each_entry(cache, &dev->cache_props, list)
1153 cache->gpu = dev->gpu;
1154 list_for_each_entry(iolink, &dev->io_link_props, list)
1155 iolink->gpu = dev->gpu;
1156 break;
1157 }
1158 }
1159 up_write(&topology_lock);
1160 return out_dev;
1161}
1162
1163static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1164{
1165 /*
1166 * TODO: Generate an event for thunk about the arrival/removal
1167 * of the GPU
1168 */
1169}
1170
1171/* kfd_fill_mem_clk_max_info - Since CRAT doesn't have memory clock info,
1172 * patch this after CRAT parsing.
1173 */
1174static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev)
1175{
1176 struct kfd_mem_properties *mem;
1177 struct kfd_local_mem_info local_mem_info;
1178
1179 if (!dev)
1180 return;
1181
1182 /* Currently, amdgpu driver (amdgpu_mc) deals only with GPUs with
1183 * single bank of VRAM local memory.
1184 * for dGPUs - VCRAT reports only one bank of Local Memory
1185 * for APUs - If CRAT from ACPI reports more than one bank, then
1186 * all the banks will report the same mem_clk_max information
1187 */
1188 amdgpu_amdkfd_get_local_mem_info(dev->gpu->kgd, &local_mem_info);
1189
1190 list_for_each_entry(mem, &dev->mem_props, list)
1191 mem->mem_clk_max = local_mem_info.mem_clk_max;
1192}
1193
1194static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev)
1195{
1196 struct kfd_iolink_properties *link, *cpu_link;
1197 struct kfd_topology_device *cpu_dev;
1198 uint32_t cap;
1199 uint32_t cpu_flag = CRAT_IOLINK_FLAGS_ENABLED;
1200 uint32_t flag = CRAT_IOLINK_FLAGS_ENABLED;
1201
1202 if (!dev || !dev->gpu)
1203 return;
1204
1205 pcie_capability_read_dword(dev->gpu->pdev,
1206 PCI_EXP_DEVCAP2, &cap);
1207
1208 if (!(cap & (PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
1209 PCI_EXP_DEVCAP2_ATOMIC_COMP64)))
1210 cpu_flag |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1211 CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1212
1213 if (!dev->gpu->pci_atomic_requested ||
1214 dev->gpu->device_info->asic_family == CHIP_HAWAII)
1215 flag |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1216 CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1217
1218 /* GPU only creates direct links so apply flags setting to all */
1219 list_for_each_entry(link, &dev->io_link_props, list) {
1220 link->flags = flag;
1221 cpu_dev = kfd_topology_device_by_proximity_domain(
1222 link->node_to);
1223 if (cpu_dev) {
1224 list_for_each_entry(cpu_link,
1225 &cpu_dev->io_link_props, list)
1226 if (cpu_link->node_to == link->node_from)
1227 cpu_link->flags = cpu_flag;
1228 }
1229 }
1230}
1231
1232int kfd_topology_add_device(struct kfd_dev *gpu)
1233{
1234 uint32_t gpu_id;
1235 struct kfd_topology_device *dev;
1236 struct kfd_cu_info cu_info;
1237 int res = 0;
1238 struct list_head temp_topology_device_list;
1239 void *crat_image = NULL;
1240 size_t image_size = 0;
1241 int proximity_domain;
1242 struct amdgpu_ras *ctx;
1243
1244 INIT_LIST_HEAD(&temp_topology_device_list);
1245
1246 gpu_id = kfd_generate_gpu_id(gpu);
1247
1248 pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1249
1250 proximity_domain = atomic_inc_return(&topology_crat_proximity_domain);
1251
1252 /* Check to see if this gpu device exists in the topology_device_list.
1253 * If so, assign the gpu to that device,
1254 * else create a Virtual CRAT for this gpu device and then parse that
1255 * CRAT to create a new topology device. Once created assign the gpu to
1256 * that topology device
1257 */
1258 dev = kfd_assign_gpu(gpu);
1259 if (!dev) {
1260 res = kfd_create_crat_image_virtual(&crat_image, &image_size,
1261 COMPUTE_UNIT_GPU, gpu,
1262 proximity_domain);
1263 if (res) {
1264 pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
1265 gpu_id);
1266 return res;
1267 }
1268 res = kfd_parse_crat_table(crat_image,
1269 &temp_topology_device_list,
1270 proximity_domain);
1271 if (res) {
1272 pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
1273 gpu_id);
1274 goto err;
1275 }
1276
1277 down_write(&topology_lock);
1278 kfd_topology_update_device_list(&temp_topology_device_list,
1279 &topology_device_list);
1280
1281 /* Update the SYSFS tree, since we added another topology
1282 * device
1283 */
1284 res = kfd_topology_update_sysfs();
1285 up_write(&topology_lock);
1286
1287 if (!res)
1288 sys_props.generation_count++;
1289 else
1290 pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology. res=%d\n",
1291 gpu_id, res);
1292 dev = kfd_assign_gpu(gpu);
1293 if (WARN_ON(!dev)) {
1294 res = -ENODEV;
1295 goto err;
1296 }
1297 }
1298
1299 dev->gpu_id = gpu_id;
1300 gpu->id = gpu_id;
1301
1302 /* TODO: Move the following lines to function
1303 * kfd_add_non_crat_information
1304 */
1305
1306 /* Fill-in additional information that is not available in CRAT but
1307 * needed for the topology
1308 */
1309
1310 amdgpu_amdkfd_get_cu_info(dev->gpu->kgd, &cu_info);
1311
1312 strncpy(dev->node_props.name, gpu->device_info->asic_name,
1313 KFD_TOPOLOGY_PUBLIC_NAME_SIZE);
1314
1315 dev->node_props.simd_arrays_per_engine =
1316 cu_info.num_shader_arrays_per_engine;
1317
1318 dev->node_props.vendor_id = gpu->pdev->vendor;
1319 dev->node_props.device_id = gpu->pdev->device;
1320 dev->node_props.capability |=
1321 ((amdgpu_amdkfd_get_asic_rev_id(dev->gpu->kgd) <<
1322 HSA_CAP_ASIC_REVISION_SHIFT) &
1323 HSA_CAP_ASIC_REVISION_MASK);
1324 dev->node_props.location_id = pci_dev_id(gpu->pdev);
1325 dev->node_props.domain = pci_domain_nr(gpu->pdev->bus);
1326 dev->node_props.max_engine_clk_fcompute =
1327 amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->kgd);
1328 dev->node_props.max_engine_clk_ccompute =
1329 cpufreq_quick_get_max(0) / 1000;
1330 dev->node_props.drm_render_minor =
1331 gpu->shared_resources.drm_render_minor;
1332
1333 dev->node_props.hive_id = gpu->hive_id;
1334 dev->node_props.num_sdma_engines = gpu->device_info->num_sdma_engines;
1335 dev->node_props.num_sdma_xgmi_engines =
1336 gpu->device_info->num_xgmi_sdma_engines;
1337 dev->node_props.num_sdma_queues_per_engine =
1338 gpu->device_info->num_sdma_queues_per_engine;
1339 dev->node_props.num_gws = (dev->gpu->gws &&
1340 dev->gpu->dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS) ?
1341 amdgpu_amdkfd_get_num_gws(dev->gpu->kgd) : 0;
1342 dev->node_props.num_cp_queues = get_cp_queues_num(dev->gpu->dqm);
1343 dev->node_props.unique_id = gpu->unique_id;
1344
1345 kfd_fill_mem_clk_max_info(dev);
1346 kfd_fill_iolink_non_crat_info(dev);
1347
1348 switch (dev->gpu->device_info->asic_family) {
1349 case CHIP_KAVERI:
1350 case CHIP_HAWAII:
1351 case CHIP_TONGA:
1352 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_PRE_1_0 <<
1353 HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1354 HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1355 break;
1356 case CHIP_CARRIZO:
1357 case CHIP_FIJI:
1358 case CHIP_POLARIS10:
1359 case CHIP_POLARIS11:
1360 case CHIP_POLARIS12:
1361 case CHIP_VEGAM:
1362 pr_debug("Adding doorbell packet type capability\n");
1363 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_1_0 <<
1364 HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1365 HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1366 break;
1367 case CHIP_VEGA10:
1368 case CHIP_VEGA12:
1369 case CHIP_VEGA20:
1370 case CHIP_RAVEN:
1371 case CHIP_RENOIR:
1372 case CHIP_ARCTURUS:
1373 case CHIP_NAVI10:
1374 case CHIP_NAVI12:
1375 case CHIP_NAVI14:
1376 case CHIP_SIENNA_CICHLID:
1377 case CHIP_NAVY_FLOUNDER:
1378 dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_2_0 <<
1379 HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1380 HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1381 break;
1382 default:
1383 WARN(1, "Unexpected ASIC family %u",
1384 dev->gpu->device_info->asic_family);
1385 }
1386
1387 /*
1388 * Overwrite ATS capability according to needs_iommu_device to fix
1389 * potential missing corresponding bit in CRAT of BIOS.
1390 */
1391 if (dev->gpu->device_info->needs_iommu_device)
1392 dev->node_props.capability |= HSA_CAP_ATS_PRESENT;
1393 else
1394 dev->node_props.capability &= ~HSA_CAP_ATS_PRESENT;
1395
1396 /* Fix errors in CZ CRAT.
1397 * simd_count: Carrizo CRAT reports wrong simd_count, probably
1398 * because it doesn't consider masked out CUs
1399 * max_waves_per_simd: Carrizo reports wrong max_waves_per_simd
1400 */
1401 if (dev->gpu->device_info->asic_family == CHIP_CARRIZO) {
1402 dev->node_props.simd_count =
1403 cu_info.simd_per_cu * cu_info.cu_active_number;
1404 dev->node_props.max_waves_per_simd = 10;
1405 }
1406
1407 ctx = amdgpu_ras_get_context((struct amdgpu_device *)(dev->gpu->kgd));
1408 if (ctx) {
1409 /* kfd only concerns sram ecc on GFX/SDMA and HBM ecc on UMC */
1410 dev->node_props.capability |=
1411 (((ctx->features & BIT(AMDGPU_RAS_BLOCK__SDMA)) != 0) ||
1412 ((ctx->features & BIT(AMDGPU_RAS_BLOCK__GFX)) != 0)) ?
1413 HSA_CAP_SRAM_EDCSUPPORTED : 0;
1414 dev->node_props.capability |= ((ctx->features & BIT(AMDGPU_RAS_BLOCK__UMC)) != 0) ?
1415 HSA_CAP_MEM_EDCSUPPORTED : 0;
1416
1417 dev->node_props.capability |= (ctx->features != 0) ?
1418 HSA_CAP_RASEVENTNOTIFY : 0;
1419 }
1420
1421 kfd_debug_print_topology();
1422
1423 if (!res)
1424 kfd_notify_gpu_change(gpu_id, 1);
1425err:
1426 kfd_destroy_crat_image(crat_image);
1427 return res;
1428}
1429
1430int kfd_topology_remove_device(struct kfd_dev *gpu)
1431{
1432 struct kfd_topology_device *dev, *tmp;
1433 uint32_t gpu_id;
1434 int res = -ENODEV;
1435
1436 down_write(&topology_lock);
1437
1438 list_for_each_entry_safe(dev, tmp, &topology_device_list, list)
1439 if (dev->gpu == gpu) {
1440 gpu_id = dev->gpu_id;
1441 kfd_remove_sysfs_node_entry(dev);
1442 kfd_release_topology_device(dev);
1443 sys_props.num_devices--;
1444 res = 0;
1445 if (kfd_topology_update_sysfs() < 0)
1446 kfd_topology_release_sysfs();
1447 break;
1448 }
1449
1450 up_write(&topology_lock);
1451
1452 if (!res)
1453 kfd_notify_gpu_change(gpu_id, 0);
1454
1455 return res;
1456}
1457
1458/* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD
1459 * topology. If GPU device is found @idx, then valid kfd_dev pointer is
1460 * returned through @kdev
1461 * Return - 0: On success (@kdev will be NULL for non GPU nodes)
1462 * -1: If end of list
1463 */
1464int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_dev **kdev)
1465{
1466
1467 struct kfd_topology_device *top_dev;
1468 uint8_t device_idx = 0;
1469
1470 *kdev = NULL;
1471 down_read(&topology_lock);
1472
1473 list_for_each_entry(top_dev, &topology_device_list, list) {
1474 if (device_idx == idx) {
1475 *kdev = top_dev->gpu;
1476 up_read(&topology_lock);
1477 return 0;
1478 }
1479
1480 device_idx++;
1481 }
1482
1483 up_read(&topology_lock);
1484
1485 return -1;
1486
1487}
1488
1489static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
1490{
1491 int first_cpu_of_numa_node;
1492
1493 if (!cpumask || cpumask == cpu_none_mask)
1494 return -1;
1495 first_cpu_of_numa_node = cpumask_first(cpumask);
1496 if (first_cpu_of_numa_node >= nr_cpu_ids)
1497 return -1;
1498#ifdef CONFIG_X86_64
1499 return cpu_data(first_cpu_of_numa_node).apicid;
1500#else
1501 return first_cpu_of_numa_node;
1502#endif
1503}
1504
1505/* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor
1506 * of the given NUMA node (numa_node_id)
1507 * Return -1 on failure
1508 */
1509int kfd_numa_node_to_apic_id(int numa_node_id)
1510{
1511 if (numa_node_id == -1) {
1512 pr_warn("Invalid NUMA Node. Use online CPU mask\n");
1513 return kfd_cpumask_to_apic_id(cpu_online_mask);
1514 }
1515 return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id));
1516}
1517
1518#if defined(CONFIG_DEBUG_FS)
1519
1520int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data)
1521{
1522 struct kfd_topology_device *dev;
1523 unsigned int i = 0;
1524 int r = 0;
1525
1526 down_read(&topology_lock);
1527
1528 list_for_each_entry(dev, &topology_device_list, list) {
1529 if (!dev->gpu) {
1530 i++;
1531 continue;
1532 }
1533
1534 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1535 r = dqm_debugfs_hqds(m, dev->gpu->dqm);
1536 if (r)
1537 break;
1538 }
1539
1540 up_read(&topology_lock);
1541
1542 return r;
1543}
1544
1545int kfd_debugfs_rls_by_device(struct seq_file *m, void *data)
1546{
1547 struct kfd_topology_device *dev;
1548 unsigned int i = 0;
1549 int r = 0;
1550
1551 down_read(&topology_lock);
1552
1553 list_for_each_entry(dev, &topology_device_list, list) {
1554 if (!dev->gpu) {
1555 i++;
1556 continue;
1557 }
1558
1559 seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
1560 r = pm_debugfs_runlist(m, &dev->gpu->dqm->packets);
1561 if (r)
1562 break;
1563 }
1564
1565 up_read(&topology_lock);
1566
1567 return r;
1568}
1569
1570#endif
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}