1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /*
3  * Copyright 2014-2022 Advanced Micro Devices, Inc.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included in
13  * all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  */
23 
24 #include <linux/types.h>
25 #include <linux/kernel.h>
26 #include <linux/pci.h>
27 #include <linux/errno.h>
28 #include <linux/acpi.h>
29 #include <linux/hash.h>
30 #include <linux/cpufreq.h>
31 #include <linux/log2.h>
32 #include <linux/dmi.h>
33 #include <linux/atomic.h>
34 
35 #include "kfd_priv.h"
36 #include "kfd_crat.h"
37 #include "kfd_topology.h"
38 #include "kfd_device_queue_manager.h"
39 #include "kfd_svm.h"
40 #include "kfd_debug.h"
41 #include "amdgpu_amdkfd.h"
42 #include "amdgpu_ras.h"
43 #include "amdgpu.h"
44 
45 /* topology_device_list - Master list of all topology devices */
46 static struct list_head topology_device_list;
47 static struct kfd_system_properties sys_props;
48 
49 static DECLARE_RWSEM(topology_lock);
50 static uint32_t topology_crat_proximity_domain;
51 
52 struct kfd_topology_device *kfd_topology_device_by_proximity_domain_no_lock(
53 						uint32_t proximity_domain)
54 {
55 	struct kfd_topology_device *top_dev;
56 	struct kfd_topology_device *device = NULL;
57 
58 	list_for_each_entry(top_dev, &topology_device_list, list)
59 		if (top_dev->proximity_domain == proximity_domain) {
60 			device = top_dev;
61 			break;
62 		}
63 
64 	return device;
65 }
66 
67 struct kfd_topology_device *kfd_topology_device_by_proximity_domain(
68 						uint32_t proximity_domain)
69 {
70 	struct kfd_topology_device *device = NULL;
71 
72 	down_read(&topology_lock);
73 
74 	device = kfd_topology_device_by_proximity_domain_no_lock(
75 							proximity_domain);
76 	up_read(&topology_lock);
77 
78 	return device;
79 }
80 
81 struct kfd_topology_device *kfd_topology_device_by_id(uint32_t gpu_id)
82 {
83 	struct kfd_topology_device *top_dev = NULL;
84 	struct kfd_topology_device *ret = NULL;
85 
86 	down_read(&topology_lock);
87 
88 	list_for_each_entry(top_dev, &topology_device_list, list)
89 		if (top_dev->gpu_id == gpu_id) {
90 			ret = top_dev;
91 			break;
92 		}
93 
94 	up_read(&topology_lock);
95 
96 	return ret;
97 }
98 
99 struct kfd_node *kfd_device_by_id(uint32_t gpu_id)
100 {
101 	struct kfd_topology_device *top_dev;
102 
103 	top_dev = kfd_topology_device_by_id(gpu_id);
104 	if (!top_dev)
105 		return NULL;
106 
107 	return top_dev->gpu;
108 }
109 
110 struct kfd_node *kfd_device_by_pci_dev(const struct pci_dev *pdev)
111 {
112 	struct kfd_topology_device *top_dev;
113 	struct kfd_node *device = NULL;
114 
115 	down_read(&topology_lock);
116 
117 	list_for_each_entry(top_dev, &topology_device_list, list)
118 		if (top_dev->gpu && top_dev->gpu->adev->pdev == pdev) {
119 			device = top_dev->gpu;
120 			break;
121 		}
122 
123 	up_read(&topology_lock);
124 
125 	return device;
126 }
127 
128 /* Called with write topology_lock acquired */
129 static void kfd_release_topology_device(struct kfd_topology_device *dev)
130 {
131 	struct kfd_mem_properties *mem;
132 	struct kfd_cache_properties *cache;
133 	struct kfd_iolink_properties *iolink;
134 	struct kfd_iolink_properties *p2plink;
135 	struct kfd_perf_properties *perf;
136 
137 	list_del(&dev->list);
138 
139 	while (dev->mem_props.next != &dev->mem_props) {
140 		mem = container_of(dev->mem_props.next,
141 				struct kfd_mem_properties, list);
142 		list_del(&mem->list);
143 		kfree(mem);
144 	}
145 
146 	while (dev->cache_props.next != &dev->cache_props) {
147 		cache = container_of(dev->cache_props.next,
148 				struct kfd_cache_properties, list);
149 		list_del(&cache->list);
150 		kfree(cache);
151 	}
152 
153 	while (dev->io_link_props.next != &dev->io_link_props) {
154 		iolink = container_of(dev->io_link_props.next,
155 				struct kfd_iolink_properties, list);
156 		list_del(&iolink->list);
157 		kfree(iolink);
158 	}
159 
160 	while (dev->p2p_link_props.next != &dev->p2p_link_props) {
161 		p2plink = container_of(dev->p2p_link_props.next,
162 				struct kfd_iolink_properties, list);
163 		list_del(&p2plink->list);
164 		kfree(p2plink);
165 	}
166 
167 	while (dev->perf_props.next != &dev->perf_props) {
168 		perf = container_of(dev->perf_props.next,
169 				struct kfd_perf_properties, list);
170 		list_del(&perf->list);
171 		kfree(perf);
172 	}
173 
174 	kfree(dev);
175 }
176 
177 void kfd_release_topology_device_list(struct list_head *device_list)
178 {
179 	struct kfd_topology_device *dev;
180 
181 	while (!list_empty(device_list)) {
182 		dev = list_first_entry(device_list,
183 				       struct kfd_topology_device, list);
184 		kfd_release_topology_device(dev);
185 	}
186 }
187 
188 static void kfd_release_live_view(void)
189 {
190 	kfd_release_topology_device_list(&topology_device_list);
191 	memset(&sys_props, 0, sizeof(sys_props));
192 }
193 
194 struct kfd_topology_device *kfd_create_topology_device(
195 				struct list_head *device_list)
196 {
197 	struct kfd_topology_device *dev;
198 
199 	dev = kfd_alloc_struct(dev);
200 	if (!dev) {
201 		pr_err("No memory to allocate a topology device");
202 		return NULL;
203 	}
204 
205 	INIT_LIST_HEAD(&dev->mem_props);
206 	INIT_LIST_HEAD(&dev->cache_props);
207 	INIT_LIST_HEAD(&dev->io_link_props);
208 	INIT_LIST_HEAD(&dev->p2p_link_props);
209 	INIT_LIST_HEAD(&dev->perf_props);
210 
211 	list_add_tail(&dev->list, device_list);
212 
213 	return dev;
214 }
215 
216 
217 #define sysfs_show_gen_prop(buffer, offs, fmt, ...)		\
218 		(offs += snprintf(buffer+offs, PAGE_SIZE-offs,	\
219 				  fmt, __VA_ARGS__))
220 #define sysfs_show_32bit_prop(buffer, offs, name, value) \
221 		sysfs_show_gen_prop(buffer, offs, "%s %u\n", name, value)
222 #define sysfs_show_64bit_prop(buffer, offs, name, value) \
223 		sysfs_show_gen_prop(buffer, offs, "%s %llu\n", name, value)
224 #define sysfs_show_32bit_val(buffer, offs, value) \
225 		sysfs_show_gen_prop(buffer, offs, "%u\n", value)
226 #define sysfs_show_str_val(buffer, offs, value) \
227 		sysfs_show_gen_prop(buffer, offs, "%s\n", value)
228 
229 static ssize_t sysprops_show(struct kobject *kobj, struct attribute *attr,
230 		char *buffer)
231 {
232 	int offs = 0;
233 
234 	/* Making sure that the buffer is an empty string */
235 	buffer[0] = 0;
236 
237 	if (attr == &sys_props.attr_genid) {
238 		sysfs_show_32bit_val(buffer, offs,
239 				     sys_props.generation_count);
240 	} else if (attr == &sys_props.attr_props) {
241 		sysfs_show_64bit_prop(buffer, offs, "platform_oem",
242 				      sys_props.platform_oem);
243 		sysfs_show_64bit_prop(buffer, offs, "platform_id",
244 				      sys_props.platform_id);
245 		sysfs_show_64bit_prop(buffer, offs, "platform_rev",
246 				      sys_props.platform_rev);
247 	} else {
248 		offs = -EINVAL;
249 	}
250 
251 	return offs;
252 }
253 
254 static void kfd_topology_kobj_release(struct kobject *kobj)
255 {
256 	kfree(kobj);
257 }
258 
259 static const struct sysfs_ops sysprops_ops = {
260 	.show = sysprops_show,
261 };
262 
263 static const struct kobj_type sysprops_type = {
264 	.release = kfd_topology_kobj_release,
265 	.sysfs_ops = &sysprops_ops,
266 };
267 
268 static ssize_t iolink_show(struct kobject *kobj, struct attribute *attr,
269 		char *buffer)
270 {
271 	int offs = 0;
272 	struct kfd_iolink_properties *iolink;
273 
274 	/* Making sure that the buffer is an empty string */
275 	buffer[0] = 0;
276 
277 	iolink = container_of(attr, struct kfd_iolink_properties, attr);
278 	if (iolink->gpu && kfd_devcgroup_check_permission(iolink->gpu))
279 		return -EPERM;
280 	sysfs_show_32bit_prop(buffer, offs, "type", iolink->iolink_type);
281 	sysfs_show_32bit_prop(buffer, offs, "version_major", iolink->ver_maj);
282 	sysfs_show_32bit_prop(buffer, offs, "version_minor", iolink->ver_min);
283 	sysfs_show_32bit_prop(buffer, offs, "node_from", iolink->node_from);
284 	sysfs_show_32bit_prop(buffer, offs, "node_to", iolink->node_to);
285 	sysfs_show_32bit_prop(buffer, offs, "weight", iolink->weight);
286 	sysfs_show_32bit_prop(buffer, offs, "min_latency", iolink->min_latency);
287 	sysfs_show_32bit_prop(buffer, offs, "max_latency", iolink->max_latency);
288 	sysfs_show_32bit_prop(buffer, offs, "min_bandwidth",
289 			      iolink->min_bandwidth);
290 	sysfs_show_32bit_prop(buffer, offs, "max_bandwidth",
291 			      iolink->max_bandwidth);
292 	sysfs_show_32bit_prop(buffer, offs, "recommended_transfer_size",
293 			      iolink->rec_transfer_size);
294 	sysfs_show_32bit_prop(buffer, offs, "flags", iolink->flags);
295 
296 	return offs;
297 }
298 
299 static const struct sysfs_ops iolink_ops = {
300 	.show = iolink_show,
301 };
302 
303 static const struct kobj_type iolink_type = {
304 	.release = kfd_topology_kobj_release,
305 	.sysfs_ops = &iolink_ops,
306 };
307 
308 static ssize_t mem_show(struct kobject *kobj, struct attribute *attr,
309 		char *buffer)
310 {
311 	int offs = 0;
312 	struct kfd_mem_properties *mem;
313 
314 	/* Making sure that the buffer is an empty string */
315 	buffer[0] = 0;
316 
317 	mem = container_of(attr, struct kfd_mem_properties, attr);
318 	if (mem->gpu && kfd_devcgroup_check_permission(mem->gpu))
319 		return -EPERM;
320 	sysfs_show_32bit_prop(buffer, offs, "heap_type", mem->heap_type);
321 	sysfs_show_64bit_prop(buffer, offs, "size_in_bytes",
322 			      mem->size_in_bytes);
323 	sysfs_show_32bit_prop(buffer, offs, "flags", mem->flags);
324 	sysfs_show_32bit_prop(buffer, offs, "width", mem->width);
325 	sysfs_show_32bit_prop(buffer, offs, "mem_clk_max",
326 			      mem->mem_clk_max);
327 
328 	return offs;
329 }
330 
331 static const struct sysfs_ops mem_ops = {
332 	.show = mem_show,
333 };
334 
335 static const struct kobj_type mem_type = {
336 	.release = kfd_topology_kobj_release,
337 	.sysfs_ops = &mem_ops,
338 };
339 
340 static ssize_t kfd_cache_show(struct kobject *kobj, struct attribute *attr,
341 		char *buffer)
342 {
343 	int offs = 0;
344 	uint32_t i, j;
345 	struct kfd_cache_properties *cache;
346 
347 	/* Making sure that the buffer is an empty string */
348 	buffer[0] = 0;
349 	cache = container_of(attr, struct kfd_cache_properties, attr);
350 	if (cache->gpu && kfd_devcgroup_check_permission(cache->gpu))
351 		return -EPERM;
352 	sysfs_show_32bit_prop(buffer, offs, "processor_id_low",
353 			cache->processor_id_low);
354 	sysfs_show_32bit_prop(buffer, offs, "level", cache->cache_level);
355 	sysfs_show_32bit_prop(buffer, offs, "size", cache->cache_size);
356 	sysfs_show_32bit_prop(buffer, offs, "cache_line_size",
357 			      cache->cacheline_size);
358 	sysfs_show_32bit_prop(buffer, offs, "cache_lines_per_tag",
359 			      cache->cachelines_per_tag);
360 	sysfs_show_32bit_prop(buffer, offs, "association", cache->cache_assoc);
361 	sysfs_show_32bit_prop(buffer, offs, "latency", cache->cache_latency);
362 	sysfs_show_32bit_prop(buffer, offs, "type", cache->cache_type);
363 
364 	offs += snprintf(buffer+offs, PAGE_SIZE-offs, "sibling_map ");
365 	for (i = 0; i < cache->sibling_map_size; i++)
366 		for (j = 0; j < sizeof(cache->sibling_map[0])*8; j++)
367 			/* Check each bit */
368 			offs += snprintf(buffer+offs, PAGE_SIZE-offs, "%d,",
369 						(cache->sibling_map[i] >> j) & 1);
370 
371 	/* Replace the last "," with end of line */
372 	buffer[offs-1] = '\n';
373 	return offs;
374 }
375 
376 static const struct sysfs_ops cache_ops = {
377 	.show = kfd_cache_show,
378 };
379 
380 static const struct kobj_type cache_type = {
381 	.release = kfd_topology_kobj_release,
382 	.sysfs_ops = &cache_ops,
383 };
384 
385 /****** Sysfs of Performance Counters ******/
386 
387 struct kfd_perf_attr {
388 	struct kobj_attribute attr;
389 	uint32_t data;
390 };
391 
392 static ssize_t perf_show(struct kobject *kobj, struct kobj_attribute *attrs,
393 			char *buf)
394 {
395 	int offs = 0;
396 	struct kfd_perf_attr *attr;
397 
398 	buf[0] = 0;
399 	attr = container_of(attrs, struct kfd_perf_attr, attr);
400 	if (!attr->data) /* invalid data for PMC */
401 		return 0;
402 	else
403 		return sysfs_show_32bit_val(buf, offs, attr->data);
404 }
405 
406 #define KFD_PERF_DESC(_name, _data)			\
407 {							\
408 	.attr  = __ATTR(_name, 0444, perf_show, NULL),	\
409 	.data = _data,					\
410 }
411 
412 static struct kfd_perf_attr perf_attr_iommu[] = {
413 	KFD_PERF_DESC(max_concurrent, 0),
414 	KFD_PERF_DESC(num_counters, 0),
415 	KFD_PERF_DESC(counter_ids, 0),
416 };
417 /****************************************/
418 
419 static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
420 		char *buffer)
421 {
422 	int offs = 0;
423 	struct kfd_topology_device *dev;
424 	uint32_t log_max_watch_addr;
425 
426 	/* Making sure that the buffer is an empty string */
427 	buffer[0] = 0;
428 
429 	if (strcmp(attr->name, "gpu_id") == 0) {
430 		dev = container_of(attr, struct kfd_topology_device,
431 				attr_gpuid);
432 		if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
433 			return -EPERM;
434 		return sysfs_show_32bit_val(buffer, offs, dev->gpu_id);
435 	}
436 
437 	if (strcmp(attr->name, "name") == 0) {
438 		dev = container_of(attr, struct kfd_topology_device,
439 				attr_name);
440 
441 		if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
442 			return -EPERM;
443 		return sysfs_show_str_val(buffer, offs, dev->node_props.name);
444 	}
445 
446 	dev = container_of(attr, struct kfd_topology_device,
447 			attr_props);
448 	if (dev->gpu && kfd_devcgroup_check_permission(dev->gpu))
449 		return -EPERM;
450 	sysfs_show_32bit_prop(buffer, offs, "cpu_cores_count",
451 			      dev->node_props.cpu_cores_count);
452 	sysfs_show_32bit_prop(buffer, offs, "simd_count",
453 			      dev->gpu ? dev->node_props.simd_count : 0);
454 	sysfs_show_32bit_prop(buffer, offs, "mem_banks_count",
455 			      dev->node_props.mem_banks_count);
456 	sysfs_show_32bit_prop(buffer, offs, "caches_count",
457 			      dev->node_props.caches_count);
458 	sysfs_show_32bit_prop(buffer, offs, "io_links_count",
459 			      dev->node_props.io_links_count);
460 	sysfs_show_32bit_prop(buffer, offs, "p2p_links_count",
461 			      dev->node_props.p2p_links_count);
462 	sysfs_show_32bit_prop(buffer, offs, "cpu_core_id_base",
463 			      dev->node_props.cpu_core_id_base);
464 	sysfs_show_32bit_prop(buffer, offs, "simd_id_base",
465 			      dev->node_props.simd_id_base);
466 	sysfs_show_32bit_prop(buffer, offs, "max_waves_per_simd",
467 			      dev->node_props.max_waves_per_simd);
468 	sysfs_show_32bit_prop(buffer, offs, "lds_size_in_kb",
469 			      dev->node_props.lds_size_in_kb);
470 	sysfs_show_32bit_prop(buffer, offs, "gds_size_in_kb",
471 			      dev->node_props.gds_size_in_kb);
472 	sysfs_show_32bit_prop(buffer, offs, "num_gws",
473 			      dev->node_props.num_gws);
474 	sysfs_show_32bit_prop(buffer, offs, "wave_front_size",
475 			      dev->node_props.wave_front_size);
476 	sysfs_show_32bit_prop(buffer, offs, "array_count",
477 			      dev->gpu ? (dev->node_props.array_count *
478 					  NUM_XCC(dev->gpu->xcc_mask)) : 0);
479 	sysfs_show_32bit_prop(buffer, offs, "simd_arrays_per_engine",
480 			      dev->node_props.simd_arrays_per_engine);
481 	sysfs_show_32bit_prop(buffer, offs, "cu_per_simd_array",
482 			      dev->node_props.cu_per_simd_array);
483 	sysfs_show_32bit_prop(buffer, offs, "simd_per_cu",
484 			      dev->node_props.simd_per_cu);
485 	sysfs_show_32bit_prop(buffer, offs, "max_slots_scratch_cu",
486 			      dev->node_props.max_slots_scratch_cu);
487 	sysfs_show_32bit_prop(buffer, offs, "gfx_target_version",
488 			      dev->node_props.gfx_target_version);
489 	sysfs_show_32bit_prop(buffer, offs, "vendor_id",
490 			      dev->node_props.vendor_id);
491 	sysfs_show_32bit_prop(buffer, offs, "device_id",
492 			      dev->node_props.device_id);
493 	sysfs_show_32bit_prop(buffer, offs, "location_id",
494 			      dev->node_props.location_id);
495 	sysfs_show_32bit_prop(buffer, offs, "domain",
496 			      dev->node_props.domain);
497 	sysfs_show_32bit_prop(buffer, offs, "drm_render_minor",
498 			      dev->node_props.drm_render_minor);
499 	sysfs_show_64bit_prop(buffer, offs, "hive_id",
500 			      dev->node_props.hive_id);
501 	sysfs_show_32bit_prop(buffer, offs, "num_sdma_engines",
502 			      dev->node_props.num_sdma_engines);
503 	sysfs_show_32bit_prop(buffer, offs, "num_sdma_xgmi_engines",
504 			      dev->node_props.num_sdma_xgmi_engines);
505 	sysfs_show_32bit_prop(buffer, offs, "num_sdma_queues_per_engine",
506 			      dev->node_props.num_sdma_queues_per_engine);
507 	sysfs_show_32bit_prop(buffer, offs, "num_cp_queues",
508 			      dev->node_props.num_cp_queues);
509 
510 	if (dev->gpu) {
511 		log_max_watch_addr =
512 			__ilog2_u32(dev->gpu->kfd->device_info.num_of_watch_points);
513 
514 		if (log_max_watch_addr) {
515 			dev->node_props.capability |=
516 					HSA_CAP_WATCH_POINTS_SUPPORTED;
517 
518 			dev->node_props.capability |=
519 				((log_max_watch_addr <<
520 					HSA_CAP_WATCH_POINTS_TOTALBITS_SHIFT) &
521 				HSA_CAP_WATCH_POINTS_TOTALBITS_MASK);
522 		}
523 
524 		if (dev->gpu->adev->asic_type == CHIP_TONGA)
525 			dev->node_props.capability |=
526 					HSA_CAP_AQL_QUEUE_DOUBLE_MAP;
527 
528 		sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_fcompute",
529 			dev->node_props.max_engine_clk_fcompute);
530 
531 		sysfs_show_64bit_prop(buffer, offs, "local_mem_size", 0ULL);
532 
533 		sysfs_show_32bit_prop(buffer, offs, "fw_version",
534 				      dev->gpu->kfd->mec_fw_version);
535 		sysfs_show_32bit_prop(buffer, offs, "capability",
536 				      dev->node_props.capability);
537 		sysfs_show_64bit_prop(buffer, offs, "debug_prop",
538 				      dev->node_props.debug_prop);
539 		sysfs_show_32bit_prop(buffer, offs, "sdma_fw_version",
540 				      dev->gpu->kfd->sdma_fw_version);
541 		sysfs_show_64bit_prop(buffer, offs, "unique_id",
542 				      dev->gpu->adev->unique_id);
543 		sysfs_show_32bit_prop(buffer, offs, "num_xcc",
544 				      NUM_XCC(dev->gpu->xcc_mask));
545 	}
546 
547 	return sysfs_show_32bit_prop(buffer, offs, "max_engine_clk_ccompute",
548 				     cpufreq_quick_get_max(0)/1000);
549 }
550 
551 static const struct sysfs_ops node_ops = {
552 	.show = node_show,
553 };
554 
555 static const struct kobj_type node_type = {
556 	.release = kfd_topology_kobj_release,
557 	.sysfs_ops = &node_ops,
558 };
559 
560 static void kfd_remove_sysfs_file(struct kobject *kobj, struct attribute *attr)
561 {
562 	sysfs_remove_file(kobj, attr);
563 	kobject_del(kobj);
564 	kobject_put(kobj);
565 }
566 
567 static void kfd_remove_sysfs_node_entry(struct kfd_topology_device *dev)
568 {
569 	struct kfd_iolink_properties *p2plink;
570 	struct kfd_iolink_properties *iolink;
571 	struct kfd_cache_properties *cache;
572 	struct kfd_mem_properties *mem;
573 	struct kfd_perf_properties *perf;
574 
575 	if (dev->kobj_iolink) {
576 		list_for_each_entry(iolink, &dev->io_link_props, list)
577 			if (iolink->kobj) {
578 				kfd_remove_sysfs_file(iolink->kobj,
579 							&iolink->attr);
580 				iolink->kobj = NULL;
581 			}
582 		kobject_del(dev->kobj_iolink);
583 		kobject_put(dev->kobj_iolink);
584 		dev->kobj_iolink = NULL;
585 	}
586 
587 	if (dev->kobj_p2plink) {
588 		list_for_each_entry(p2plink, &dev->p2p_link_props, list)
589 			if (p2plink->kobj) {
590 				kfd_remove_sysfs_file(p2plink->kobj,
591 							&p2plink->attr);
592 				p2plink->kobj = NULL;
593 			}
594 		kobject_del(dev->kobj_p2plink);
595 		kobject_put(dev->kobj_p2plink);
596 		dev->kobj_p2plink = NULL;
597 	}
598 
599 	if (dev->kobj_cache) {
600 		list_for_each_entry(cache, &dev->cache_props, list)
601 			if (cache->kobj) {
602 				kfd_remove_sysfs_file(cache->kobj,
603 							&cache->attr);
604 				cache->kobj = NULL;
605 			}
606 		kobject_del(dev->kobj_cache);
607 		kobject_put(dev->kobj_cache);
608 		dev->kobj_cache = NULL;
609 	}
610 
611 	if (dev->kobj_mem) {
612 		list_for_each_entry(mem, &dev->mem_props, list)
613 			if (mem->kobj) {
614 				kfd_remove_sysfs_file(mem->kobj, &mem->attr);
615 				mem->kobj = NULL;
616 			}
617 		kobject_del(dev->kobj_mem);
618 		kobject_put(dev->kobj_mem);
619 		dev->kobj_mem = NULL;
620 	}
621 
622 	if (dev->kobj_perf) {
623 		list_for_each_entry(perf, &dev->perf_props, list) {
624 			kfree(perf->attr_group);
625 			perf->attr_group = NULL;
626 		}
627 		kobject_del(dev->kobj_perf);
628 		kobject_put(dev->kobj_perf);
629 		dev->kobj_perf = NULL;
630 	}
631 
632 	if (dev->kobj_node) {
633 		sysfs_remove_file(dev->kobj_node, &dev->attr_gpuid);
634 		sysfs_remove_file(dev->kobj_node, &dev->attr_name);
635 		sysfs_remove_file(dev->kobj_node, &dev->attr_props);
636 		kobject_del(dev->kobj_node);
637 		kobject_put(dev->kobj_node);
638 		dev->kobj_node = NULL;
639 	}
640 }
641 
642 static int kfd_build_sysfs_node_entry(struct kfd_topology_device *dev,
643 		uint32_t id)
644 {
645 	struct kfd_iolink_properties *p2plink;
646 	struct kfd_iolink_properties *iolink;
647 	struct kfd_cache_properties *cache;
648 	struct kfd_mem_properties *mem;
649 	struct kfd_perf_properties *perf;
650 	int ret;
651 	uint32_t i, num_attrs;
652 	struct attribute **attrs;
653 
654 	if (WARN_ON(dev->kobj_node))
655 		return -EEXIST;
656 
657 	/*
658 	 * Creating the sysfs folders
659 	 */
660 	dev->kobj_node = kfd_alloc_struct(dev->kobj_node);
661 	if (!dev->kobj_node)
662 		return -ENOMEM;
663 
664 	ret = kobject_init_and_add(dev->kobj_node, &node_type,
665 			sys_props.kobj_nodes, "%d", id);
666 	if (ret < 0) {
667 		kobject_put(dev->kobj_node);
668 		return ret;
669 	}
670 
671 	dev->kobj_mem = kobject_create_and_add("mem_banks", dev->kobj_node);
672 	if (!dev->kobj_mem)
673 		return -ENOMEM;
674 
675 	dev->kobj_cache = kobject_create_and_add("caches", dev->kobj_node);
676 	if (!dev->kobj_cache)
677 		return -ENOMEM;
678 
679 	dev->kobj_iolink = kobject_create_and_add("io_links", dev->kobj_node);
680 	if (!dev->kobj_iolink)
681 		return -ENOMEM;
682 
683 	dev->kobj_p2plink = kobject_create_and_add("p2p_links", dev->kobj_node);
684 	if (!dev->kobj_p2plink)
685 		return -ENOMEM;
686 
687 	dev->kobj_perf = kobject_create_and_add("perf", dev->kobj_node);
688 	if (!dev->kobj_perf)
689 		return -ENOMEM;
690 
691 	/*
692 	 * Creating sysfs files for node properties
693 	 */
694 	dev->attr_gpuid.name = "gpu_id";
695 	dev->attr_gpuid.mode = KFD_SYSFS_FILE_MODE;
696 	sysfs_attr_init(&dev->attr_gpuid);
697 	dev->attr_name.name = "name";
698 	dev->attr_name.mode = KFD_SYSFS_FILE_MODE;
699 	sysfs_attr_init(&dev->attr_name);
700 	dev->attr_props.name = "properties";
701 	dev->attr_props.mode = KFD_SYSFS_FILE_MODE;
702 	sysfs_attr_init(&dev->attr_props);
703 	ret = sysfs_create_file(dev->kobj_node, &dev->attr_gpuid);
704 	if (ret < 0)
705 		return ret;
706 	ret = sysfs_create_file(dev->kobj_node, &dev->attr_name);
707 	if (ret < 0)
708 		return ret;
709 	ret = sysfs_create_file(dev->kobj_node, &dev->attr_props);
710 	if (ret < 0)
711 		return ret;
712 
713 	i = 0;
714 	list_for_each_entry(mem, &dev->mem_props, list) {
715 		mem->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
716 		if (!mem->kobj)
717 			return -ENOMEM;
718 		ret = kobject_init_and_add(mem->kobj, &mem_type,
719 				dev->kobj_mem, "%d", i);
720 		if (ret < 0) {
721 			kobject_put(mem->kobj);
722 			return ret;
723 		}
724 
725 		mem->attr.name = "properties";
726 		mem->attr.mode = KFD_SYSFS_FILE_MODE;
727 		sysfs_attr_init(&mem->attr);
728 		ret = sysfs_create_file(mem->kobj, &mem->attr);
729 		if (ret < 0)
730 			return ret;
731 		i++;
732 	}
733 
734 	i = 0;
735 	list_for_each_entry(cache, &dev->cache_props, list) {
736 		cache->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
737 		if (!cache->kobj)
738 			return -ENOMEM;
739 		ret = kobject_init_and_add(cache->kobj, &cache_type,
740 				dev->kobj_cache, "%d", i);
741 		if (ret < 0) {
742 			kobject_put(cache->kobj);
743 			return ret;
744 		}
745 
746 		cache->attr.name = "properties";
747 		cache->attr.mode = KFD_SYSFS_FILE_MODE;
748 		sysfs_attr_init(&cache->attr);
749 		ret = sysfs_create_file(cache->kobj, &cache->attr);
750 		if (ret < 0)
751 			return ret;
752 		i++;
753 	}
754 
755 	i = 0;
756 	list_for_each_entry(iolink, &dev->io_link_props, list) {
757 		iolink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
758 		if (!iolink->kobj)
759 			return -ENOMEM;
760 		ret = kobject_init_and_add(iolink->kobj, &iolink_type,
761 				dev->kobj_iolink, "%d", i);
762 		if (ret < 0) {
763 			kobject_put(iolink->kobj);
764 			return ret;
765 		}
766 
767 		iolink->attr.name = "properties";
768 		iolink->attr.mode = KFD_SYSFS_FILE_MODE;
769 		sysfs_attr_init(&iolink->attr);
770 		ret = sysfs_create_file(iolink->kobj, &iolink->attr);
771 		if (ret < 0)
772 			return ret;
773 		i++;
774 	}
775 
776 	i = 0;
777 	list_for_each_entry(p2plink, &dev->p2p_link_props, list) {
778 		p2plink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
779 		if (!p2plink->kobj)
780 			return -ENOMEM;
781 		ret = kobject_init_and_add(p2plink->kobj, &iolink_type,
782 				dev->kobj_p2plink, "%d", i);
783 		if (ret < 0) {
784 			kobject_put(p2plink->kobj);
785 			return ret;
786 		}
787 
788 		p2plink->attr.name = "properties";
789 		p2plink->attr.mode = KFD_SYSFS_FILE_MODE;
790 		sysfs_attr_init(&p2plink->attr);
791 		ret = sysfs_create_file(p2plink->kobj, &p2plink->attr);
792 		if (ret < 0)
793 			return ret;
794 		i++;
795 	}
796 
797 	/* All hardware blocks have the same number of attributes. */
798 	num_attrs = ARRAY_SIZE(perf_attr_iommu);
799 	list_for_each_entry(perf, &dev->perf_props, list) {
800 		perf->attr_group = kzalloc(sizeof(struct kfd_perf_attr)
801 			* num_attrs + sizeof(struct attribute_group),
802 			GFP_KERNEL);
803 		if (!perf->attr_group)
804 			return -ENOMEM;
805 
806 		attrs = (struct attribute **)(perf->attr_group + 1);
807 		if (!strcmp(perf->block_name, "iommu")) {
808 		/* Information of IOMMU's num_counters and counter_ids is shown
809 		 * under /sys/bus/event_source/devices/amd_iommu. We don't
810 		 * duplicate here.
811 		 */
812 			perf_attr_iommu[0].data = perf->max_concurrent;
813 			for (i = 0; i < num_attrs; i++)
814 				attrs[i] = &perf_attr_iommu[i].attr.attr;
815 		}
816 		perf->attr_group->name = perf->block_name;
817 		perf->attr_group->attrs = attrs;
818 		ret = sysfs_create_group(dev->kobj_perf, perf->attr_group);
819 		if (ret < 0)
820 			return ret;
821 	}
822 
823 	return 0;
824 }
825 
826 /* Called with write topology lock acquired */
827 static int kfd_build_sysfs_node_tree(void)
828 {
829 	struct kfd_topology_device *dev;
830 	int ret;
831 	uint32_t i = 0;
832 
833 	list_for_each_entry(dev, &topology_device_list, list) {
834 		ret = kfd_build_sysfs_node_entry(dev, i);
835 		if (ret < 0)
836 			return ret;
837 		i++;
838 	}
839 
840 	return 0;
841 }
842 
843 /* Called with write topology lock acquired */
844 static void kfd_remove_sysfs_node_tree(void)
845 {
846 	struct kfd_topology_device *dev;
847 
848 	list_for_each_entry(dev, &topology_device_list, list)
849 		kfd_remove_sysfs_node_entry(dev);
850 }
851 
852 static int kfd_topology_update_sysfs(void)
853 {
854 	int ret;
855 
856 	if (!sys_props.kobj_topology) {
857 		sys_props.kobj_topology =
858 				kfd_alloc_struct(sys_props.kobj_topology);
859 		if (!sys_props.kobj_topology)
860 			return -ENOMEM;
861 
862 		ret = kobject_init_and_add(sys_props.kobj_topology,
863 				&sysprops_type,  &kfd_device->kobj,
864 				"topology");
865 		if (ret < 0) {
866 			kobject_put(sys_props.kobj_topology);
867 			return ret;
868 		}
869 
870 		sys_props.kobj_nodes = kobject_create_and_add("nodes",
871 				sys_props.kobj_topology);
872 		if (!sys_props.kobj_nodes)
873 			return -ENOMEM;
874 
875 		sys_props.attr_genid.name = "generation_id";
876 		sys_props.attr_genid.mode = KFD_SYSFS_FILE_MODE;
877 		sysfs_attr_init(&sys_props.attr_genid);
878 		ret = sysfs_create_file(sys_props.kobj_topology,
879 				&sys_props.attr_genid);
880 		if (ret < 0)
881 			return ret;
882 
883 		sys_props.attr_props.name = "system_properties";
884 		sys_props.attr_props.mode = KFD_SYSFS_FILE_MODE;
885 		sysfs_attr_init(&sys_props.attr_props);
886 		ret = sysfs_create_file(sys_props.kobj_topology,
887 				&sys_props.attr_props);
888 		if (ret < 0)
889 			return ret;
890 	}
891 
892 	kfd_remove_sysfs_node_tree();
893 
894 	return kfd_build_sysfs_node_tree();
895 }
896 
897 static void kfd_topology_release_sysfs(void)
898 {
899 	kfd_remove_sysfs_node_tree();
900 	if (sys_props.kobj_topology) {
901 		sysfs_remove_file(sys_props.kobj_topology,
902 				&sys_props.attr_genid);
903 		sysfs_remove_file(sys_props.kobj_topology,
904 				&sys_props.attr_props);
905 		if (sys_props.kobj_nodes) {
906 			kobject_del(sys_props.kobj_nodes);
907 			kobject_put(sys_props.kobj_nodes);
908 			sys_props.kobj_nodes = NULL;
909 		}
910 		kobject_del(sys_props.kobj_topology);
911 		kobject_put(sys_props.kobj_topology);
912 		sys_props.kobj_topology = NULL;
913 	}
914 }
915 
916 /* Called with write topology_lock acquired */
917 static void kfd_topology_update_device_list(struct list_head *temp_list,
918 					struct list_head *master_list)
919 {
920 	while (!list_empty(temp_list)) {
921 		list_move_tail(temp_list->next, master_list);
922 		sys_props.num_devices++;
923 	}
924 }
925 
926 static void kfd_debug_print_topology(void)
927 {
928 	struct kfd_topology_device *dev;
929 
930 	down_read(&topology_lock);
931 
932 	dev = list_last_entry(&topology_device_list,
933 			struct kfd_topology_device, list);
934 	if (dev) {
935 		if (dev->node_props.cpu_cores_count &&
936 				dev->node_props.simd_count) {
937 			pr_info("Topology: Add APU node [0x%0x:0x%0x]\n",
938 				dev->node_props.device_id,
939 				dev->node_props.vendor_id);
940 		} else if (dev->node_props.cpu_cores_count)
941 			pr_info("Topology: Add CPU node\n");
942 		else if (dev->node_props.simd_count)
943 			pr_info("Topology: Add dGPU node [0x%0x:0x%0x]\n",
944 				dev->node_props.device_id,
945 				dev->node_props.vendor_id);
946 	}
947 	up_read(&topology_lock);
948 }
949 
950 /* Helper function for intializing platform_xx members of
951  * kfd_system_properties. Uses OEM info from the last CPU/APU node.
952  */
953 static void kfd_update_system_properties(void)
954 {
955 	struct kfd_topology_device *dev;
956 
957 	down_read(&topology_lock);
958 	dev = list_last_entry(&topology_device_list,
959 			struct kfd_topology_device, list);
960 	if (dev) {
961 		sys_props.platform_id =
962 			(*((uint64_t *)dev->oem_id)) & CRAT_OEMID_64BIT_MASK;
963 		sys_props.platform_oem = *((uint64_t *)dev->oem_table_id);
964 		sys_props.platform_rev = dev->oem_revision;
965 	}
966 	up_read(&topology_lock);
967 }
968 
969 static void find_system_memory(const struct dmi_header *dm,
970 	void *private)
971 {
972 	struct kfd_mem_properties *mem;
973 	u16 mem_width, mem_clock;
974 	struct kfd_topology_device *kdev =
975 		(struct kfd_topology_device *)private;
976 	const u8 *dmi_data = (const u8 *)(dm + 1);
977 
978 	if (dm->type == DMI_ENTRY_MEM_DEVICE && dm->length >= 0x15) {
979 		mem_width = (u16)(*(const u16 *)(dmi_data + 0x6));
980 		mem_clock = (u16)(*(const u16 *)(dmi_data + 0x11));
981 		list_for_each_entry(mem, &kdev->mem_props, list) {
982 			if (mem_width != 0xFFFF && mem_width != 0)
983 				mem->width = mem_width;
984 			if (mem_clock != 0)
985 				mem->mem_clk_max = mem_clock;
986 		}
987 	}
988 }
989 
990 /* kfd_add_non_crat_information - Add information that is not currently
991  *	defined in CRAT but is necessary for KFD topology
992  * @dev - topology device to which addition info is added
993  */
994 static void kfd_add_non_crat_information(struct kfd_topology_device *kdev)
995 {
996 	/* Check if CPU only node. */
997 	if (!kdev->gpu) {
998 		/* Add system memory information */
999 		dmi_walk(find_system_memory, kdev);
1000 	}
1001 	/* TODO: For GPU node, rearrange code from kfd_topology_add_device */
1002 }
1003 
1004 int kfd_topology_init(void)
1005 {
1006 	void *crat_image = NULL;
1007 	size_t image_size = 0;
1008 	int ret;
1009 	struct list_head temp_topology_device_list;
1010 	int cpu_only_node = 0;
1011 	struct kfd_topology_device *kdev;
1012 	int proximity_domain;
1013 
1014 	/* topology_device_list - Master list of all topology devices
1015 	 * temp_topology_device_list - temporary list created while parsing CRAT
1016 	 * or VCRAT. Once parsing is complete the contents of list is moved to
1017 	 * topology_device_list
1018 	 */
1019 
1020 	/* Initialize the head for the both the lists */
1021 	INIT_LIST_HEAD(&topology_device_list);
1022 	INIT_LIST_HEAD(&temp_topology_device_list);
1023 	init_rwsem(&topology_lock);
1024 
1025 	memset(&sys_props, 0, sizeof(sys_props));
1026 
1027 	/* Proximity domains in ACPI CRAT tables start counting at
1028 	 * 0. The same should be true for virtual CRAT tables created
1029 	 * at this stage. GPUs added later in kfd_topology_add_device
1030 	 * use a counter.
1031 	 */
1032 	proximity_domain = 0;
1033 
1034 	ret = kfd_create_crat_image_virtual(&crat_image, &image_size,
1035 					    COMPUTE_UNIT_CPU, NULL,
1036 					    proximity_domain);
1037 	cpu_only_node = 1;
1038 	if (ret) {
1039 		pr_err("Error creating VCRAT table for CPU\n");
1040 		return ret;
1041 	}
1042 
1043 	ret = kfd_parse_crat_table(crat_image,
1044 				   &temp_topology_device_list,
1045 				   proximity_domain);
1046 	if (ret) {
1047 		pr_err("Error parsing VCRAT table for CPU\n");
1048 		goto err;
1049 	}
1050 
1051 	kdev = list_first_entry(&temp_topology_device_list,
1052 				struct kfd_topology_device, list);
1053 
1054 	down_write(&topology_lock);
1055 	kfd_topology_update_device_list(&temp_topology_device_list,
1056 					&topology_device_list);
1057 	topology_crat_proximity_domain = sys_props.num_devices-1;
1058 	ret = kfd_topology_update_sysfs();
1059 	up_write(&topology_lock);
1060 
1061 	if (!ret) {
1062 		sys_props.generation_count++;
1063 		kfd_update_system_properties();
1064 		kfd_debug_print_topology();
1065 	} else
1066 		pr_err("Failed to update topology in sysfs ret=%d\n", ret);
1067 
1068 	/* For nodes with GPU, this information gets added
1069 	 * when GPU is detected (kfd_topology_add_device).
1070 	 */
1071 	if (cpu_only_node) {
1072 		/* Add additional information to CPU only node created above */
1073 		down_write(&topology_lock);
1074 		kdev = list_first_entry(&topology_device_list,
1075 				struct kfd_topology_device, list);
1076 		up_write(&topology_lock);
1077 		kfd_add_non_crat_information(kdev);
1078 	}
1079 
1080 err:
1081 	kfd_destroy_crat_image(crat_image);
1082 	return ret;
1083 }
1084 
1085 void kfd_topology_shutdown(void)
1086 {
1087 	down_write(&topology_lock);
1088 	kfd_topology_release_sysfs();
1089 	kfd_release_live_view();
1090 	up_write(&topology_lock);
1091 }
1092 
1093 static uint32_t kfd_generate_gpu_id(struct kfd_node *gpu)
1094 {
1095 	uint32_t hashout;
1096 	uint32_t buf[8];
1097 	uint64_t local_mem_size;
1098 	int i;
1099 
1100 	if (!gpu)
1101 		return 0;
1102 
1103 	local_mem_size = gpu->local_mem_info.local_mem_size_private +
1104 			gpu->local_mem_info.local_mem_size_public;
1105 	buf[0] = gpu->adev->pdev->devfn;
1106 	buf[1] = gpu->adev->pdev->subsystem_vendor |
1107 		(gpu->adev->pdev->subsystem_device << 16);
1108 	buf[2] = pci_domain_nr(gpu->adev->pdev->bus);
1109 	buf[3] = gpu->adev->pdev->device;
1110 	buf[4] = gpu->adev->pdev->bus->number;
1111 	buf[5] = lower_32_bits(local_mem_size);
1112 	buf[6] = upper_32_bits(local_mem_size);
1113 	buf[7] = (ffs(gpu->xcc_mask) - 1) | (NUM_XCC(gpu->xcc_mask) << 16);
1114 
1115 	for (i = 0, hashout = 0; i < 8; i++)
1116 		hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);
1117 
1118 	return hashout;
1119 }
1120 /* kfd_assign_gpu - Attach @gpu to the correct kfd topology device. If
1121  *		the GPU device is not already present in the topology device
1122  *		list then return NULL. This means a new topology device has to
1123  *		be created for this GPU.
1124  */
1125 static struct kfd_topology_device *kfd_assign_gpu(struct kfd_node *gpu)
1126 {
1127 	struct kfd_topology_device *dev;
1128 	struct kfd_topology_device *out_dev = NULL;
1129 	struct kfd_mem_properties *mem;
1130 	struct kfd_cache_properties *cache;
1131 	struct kfd_iolink_properties *iolink;
1132 	struct kfd_iolink_properties *p2plink;
1133 
1134 	list_for_each_entry(dev, &topology_device_list, list) {
1135 		/* Discrete GPUs need their own topology device list
1136 		 * entries. Don't assign them to CPU/APU nodes.
1137 		 */
1138 		if (dev->node_props.cpu_cores_count)
1139 			continue;
1140 
1141 		if (!dev->gpu && (dev->node_props.simd_count > 0)) {
1142 			dev->gpu = gpu;
1143 			out_dev = dev;
1144 
1145 			list_for_each_entry(mem, &dev->mem_props, list)
1146 				mem->gpu = dev->gpu;
1147 			list_for_each_entry(cache, &dev->cache_props, list)
1148 				cache->gpu = dev->gpu;
1149 			list_for_each_entry(iolink, &dev->io_link_props, list)
1150 				iolink->gpu = dev->gpu;
1151 			list_for_each_entry(p2plink, &dev->p2p_link_props, list)
1152 				p2plink->gpu = dev->gpu;
1153 			break;
1154 		}
1155 	}
1156 	return out_dev;
1157 }
1158 
1159 static void kfd_notify_gpu_change(uint32_t gpu_id, int arrival)
1160 {
1161 	/*
1162 	 * TODO: Generate an event for thunk about the arrival/removal
1163 	 * of the GPU
1164 	 */
1165 }
1166 
1167 /* kfd_fill_mem_clk_max_info - Since CRAT doesn't have memory clock info,
1168  *		patch this after CRAT parsing.
1169  */
1170 static void kfd_fill_mem_clk_max_info(struct kfd_topology_device *dev)
1171 {
1172 	struct kfd_mem_properties *mem;
1173 	struct kfd_local_mem_info local_mem_info;
1174 
1175 	if (!dev)
1176 		return;
1177 
1178 	/* Currently, amdgpu driver (amdgpu_mc) deals only with GPUs with
1179 	 * single bank of VRAM local memory.
1180 	 * for dGPUs - VCRAT reports only one bank of Local Memory
1181 	 * for APUs - If CRAT from ACPI reports more than one bank, then
1182 	 *	all the banks will report the same mem_clk_max information
1183 	 */
1184 	amdgpu_amdkfd_get_local_mem_info(dev->gpu->adev, &local_mem_info,
1185 					 dev->gpu->xcp);
1186 
1187 	list_for_each_entry(mem, &dev->mem_props, list)
1188 		mem->mem_clk_max = local_mem_info.mem_clk_max;
1189 }
1190 
1191 static void kfd_set_iolink_no_atomics(struct kfd_topology_device *dev,
1192 					struct kfd_topology_device *target_gpu_dev,
1193 					struct kfd_iolink_properties *link)
1194 {
1195 	/* xgmi always supports atomics between links. */
1196 	if (link->iolink_type == CRAT_IOLINK_TYPE_XGMI)
1197 		return;
1198 
1199 	/* check pcie support to set cpu(dev) flags for target_gpu_dev link. */
1200 	if (target_gpu_dev) {
1201 		uint32_t cap;
1202 
1203 		pcie_capability_read_dword(target_gpu_dev->gpu->adev->pdev,
1204 				PCI_EXP_DEVCAP2, &cap);
1205 
1206 		if (!(cap & (PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
1207 			     PCI_EXP_DEVCAP2_ATOMIC_COMP64)))
1208 			link->flags |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1209 				CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1210 	/* set gpu (dev) flags. */
1211 	} else {
1212 		if (!dev->gpu->kfd->pci_atomic_requested ||
1213 				dev->gpu->adev->asic_type == CHIP_HAWAII)
1214 			link->flags |= CRAT_IOLINK_FLAGS_NO_ATOMICS_32_BIT |
1215 				CRAT_IOLINK_FLAGS_NO_ATOMICS_64_BIT;
1216 	}
1217 }
1218 
1219 static void kfd_set_iolink_non_coherent(struct kfd_topology_device *to_dev,
1220 		struct kfd_iolink_properties *outbound_link,
1221 		struct kfd_iolink_properties *inbound_link)
1222 {
1223 	/* CPU -> GPU with PCIe */
1224 	if (!to_dev->gpu &&
1225 	    inbound_link->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS)
1226 		inbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1227 
1228 	if (to_dev->gpu) {
1229 		/* GPU <-> GPU with PCIe and
1230 		 * Vega20 with XGMI
1231 		 */
1232 		if (inbound_link->iolink_type == CRAT_IOLINK_TYPE_PCIEXPRESS ||
1233 		    (inbound_link->iolink_type == CRAT_IOLINK_TYPE_XGMI &&
1234 		    KFD_GC_VERSION(to_dev->gpu) == IP_VERSION(9, 4, 0))) {
1235 			outbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1236 			inbound_link->flags |= CRAT_IOLINK_FLAGS_NON_COHERENT;
1237 		}
1238 	}
1239 }
1240 
1241 static void kfd_fill_iolink_non_crat_info(struct kfd_topology_device *dev)
1242 {
1243 	struct kfd_iolink_properties *link, *inbound_link;
1244 	struct kfd_topology_device *peer_dev;
1245 
1246 	if (!dev || !dev->gpu)
1247 		return;
1248 
1249 	/* GPU only creates direct links so apply flags setting to all */
1250 	list_for_each_entry(link, &dev->io_link_props, list) {
1251 		link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1252 		kfd_set_iolink_no_atomics(dev, NULL, link);
1253 		peer_dev = kfd_topology_device_by_proximity_domain(
1254 				link->node_to);
1255 
1256 		if (!peer_dev)
1257 			continue;
1258 
1259 		/* Include the CPU peer in GPU hive if connected over xGMI. */
1260 		if (!peer_dev->gpu &&
1261 		    link->iolink_type == CRAT_IOLINK_TYPE_XGMI) {
1262 			/*
1263 			 * If the GPU is not part of a GPU hive, use its pci
1264 			 * device location as the hive ID to bind with the CPU.
1265 			 */
1266 			if (!dev->node_props.hive_id)
1267 				dev->node_props.hive_id = pci_dev_id(dev->gpu->adev->pdev);
1268 			peer_dev->node_props.hive_id = dev->node_props.hive_id;
1269 		}
1270 
1271 		list_for_each_entry(inbound_link, &peer_dev->io_link_props,
1272 									list) {
1273 			if (inbound_link->node_to != link->node_from)
1274 				continue;
1275 
1276 			inbound_link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1277 			kfd_set_iolink_no_atomics(peer_dev, dev, inbound_link);
1278 			kfd_set_iolink_non_coherent(peer_dev, link, inbound_link);
1279 		}
1280 	}
1281 
1282 	/* Create indirect links so apply flags setting to all */
1283 	list_for_each_entry(link, &dev->p2p_link_props, list) {
1284 		link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1285 		kfd_set_iolink_no_atomics(dev, NULL, link);
1286 		peer_dev = kfd_topology_device_by_proximity_domain(
1287 				link->node_to);
1288 
1289 		if (!peer_dev)
1290 			continue;
1291 
1292 		list_for_each_entry(inbound_link, &peer_dev->p2p_link_props,
1293 									list) {
1294 			if (inbound_link->node_to != link->node_from)
1295 				continue;
1296 
1297 			inbound_link->flags = CRAT_IOLINK_FLAGS_ENABLED;
1298 			kfd_set_iolink_no_atomics(peer_dev, dev, inbound_link);
1299 			kfd_set_iolink_non_coherent(peer_dev, link, inbound_link);
1300 		}
1301 	}
1302 }
1303 
1304 static int kfd_build_p2p_node_entry(struct kfd_topology_device *dev,
1305 				struct kfd_iolink_properties *p2plink)
1306 {
1307 	int ret;
1308 
1309 	p2plink->kobj = kzalloc(sizeof(struct kobject), GFP_KERNEL);
1310 	if (!p2plink->kobj)
1311 		return -ENOMEM;
1312 
1313 	ret = kobject_init_and_add(p2plink->kobj, &iolink_type,
1314 			dev->kobj_p2plink, "%d", dev->node_props.p2p_links_count - 1);
1315 	if (ret < 0) {
1316 		kobject_put(p2plink->kobj);
1317 		return ret;
1318 	}
1319 
1320 	p2plink->attr.name = "properties";
1321 	p2plink->attr.mode = KFD_SYSFS_FILE_MODE;
1322 	sysfs_attr_init(&p2plink->attr);
1323 	ret = sysfs_create_file(p2plink->kobj, &p2plink->attr);
1324 	if (ret < 0)
1325 		return ret;
1326 
1327 	return 0;
1328 }
1329 
1330 static int kfd_create_indirect_link_prop(struct kfd_topology_device *kdev, int gpu_node)
1331 {
1332 	struct kfd_iolink_properties *gpu_link, *tmp_link, *cpu_link;
1333 	struct kfd_iolink_properties *props = NULL, *props2 = NULL;
1334 	struct kfd_topology_device *cpu_dev;
1335 	int ret = 0;
1336 	int i, num_cpu;
1337 
1338 	num_cpu = 0;
1339 	list_for_each_entry(cpu_dev, &topology_device_list, list) {
1340 		if (cpu_dev->gpu)
1341 			break;
1342 		num_cpu++;
1343 	}
1344 
1345 	gpu_link = list_first_entry(&kdev->io_link_props,
1346 					struct kfd_iolink_properties, list);
1347 	if (!gpu_link)
1348 		return -ENOMEM;
1349 
1350 	for (i = 0; i < num_cpu; i++) {
1351 		/* CPU <--> GPU */
1352 		if (gpu_link->node_to == i)
1353 			continue;
1354 
1355 		/* find CPU <-->  CPU links */
1356 		cpu_link = NULL;
1357 		cpu_dev = kfd_topology_device_by_proximity_domain(i);
1358 		if (cpu_dev) {
1359 			list_for_each_entry(tmp_link,
1360 					&cpu_dev->io_link_props, list) {
1361 				if (tmp_link->node_to == gpu_link->node_to) {
1362 					cpu_link = tmp_link;
1363 					break;
1364 				}
1365 			}
1366 		}
1367 
1368 		if (!cpu_link)
1369 			return -ENOMEM;
1370 
1371 		/* CPU <--> CPU <--> GPU, GPU node*/
1372 		props = kfd_alloc_struct(props);
1373 		if (!props)
1374 			return -ENOMEM;
1375 
1376 		memcpy(props, gpu_link, sizeof(struct kfd_iolink_properties));
1377 		props->weight = gpu_link->weight + cpu_link->weight;
1378 		props->min_latency = gpu_link->min_latency + cpu_link->min_latency;
1379 		props->max_latency = gpu_link->max_latency + cpu_link->max_latency;
1380 		props->min_bandwidth = min(gpu_link->min_bandwidth, cpu_link->min_bandwidth);
1381 		props->max_bandwidth = min(gpu_link->max_bandwidth, cpu_link->max_bandwidth);
1382 
1383 		props->node_from = gpu_node;
1384 		props->node_to = i;
1385 		kdev->node_props.p2p_links_count++;
1386 		list_add_tail(&props->list, &kdev->p2p_link_props);
1387 		ret = kfd_build_p2p_node_entry(kdev, props);
1388 		if (ret < 0)
1389 			return ret;
1390 
1391 		/* for small Bar, no CPU --> GPU in-direct links */
1392 		if (kfd_dev_is_large_bar(kdev->gpu)) {
1393 			/* CPU <--> CPU <--> GPU, CPU node*/
1394 			props2 = kfd_alloc_struct(props2);
1395 			if (!props2)
1396 				return -ENOMEM;
1397 
1398 			memcpy(props2, props, sizeof(struct kfd_iolink_properties));
1399 			props2->node_from = i;
1400 			props2->node_to = gpu_node;
1401 			props2->kobj = NULL;
1402 			cpu_dev->node_props.p2p_links_count++;
1403 			list_add_tail(&props2->list, &cpu_dev->p2p_link_props);
1404 			ret = kfd_build_p2p_node_entry(cpu_dev, props2);
1405 			if (ret < 0)
1406 				return ret;
1407 		}
1408 	}
1409 	return ret;
1410 }
1411 
1412 #if defined(CONFIG_HSA_AMD_P2P)
1413 static int kfd_add_peer_prop(struct kfd_topology_device *kdev,
1414 		struct kfd_topology_device *peer, int from, int to)
1415 {
1416 	struct kfd_iolink_properties *props = NULL;
1417 	struct kfd_iolink_properties *iolink1, *iolink2, *iolink3;
1418 	struct kfd_topology_device *cpu_dev;
1419 	int ret = 0;
1420 
1421 	if (!amdgpu_device_is_peer_accessible(
1422 				kdev->gpu->adev,
1423 				peer->gpu->adev))
1424 		return ret;
1425 
1426 	iolink1 = list_first_entry(&kdev->io_link_props,
1427 							struct kfd_iolink_properties, list);
1428 	if (!iolink1)
1429 		return -ENOMEM;
1430 
1431 	iolink2 = list_first_entry(&peer->io_link_props,
1432 							struct kfd_iolink_properties, list);
1433 	if (!iolink2)
1434 		return -ENOMEM;
1435 
1436 	props = kfd_alloc_struct(props);
1437 	if (!props)
1438 		return -ENOMEM;
1439 
1440 	memcpy(props, iolink1, sizeof(struct kfd_iolink_properties));
1441 
1442 	props->weight = iolink1->weight + iolink2->weight;
1443 	props->min_latency = iolink1->min_latency + iolink2->min_latency;
1444 	props->max_latency = iolink1->max_latency + iolink2->max_latency;
1445 	props->min_bandwidth = min(iolink1->min_bandwidth, iolink2->min_bandwidth);
1446 	props->max_bandwidth = min(iolink2->max_bandwidth, iolink2->max_bandwidth);
1447 
1448 	if (iolink1->node_to != iolink2->node_to) {
1449 		/* CPU->CPU  link*/
1450 		cpu_dev = kfd_topology_device_by_proximity_domain(iolink1->node_to);
1451 		if (cpu_dev) {
1452 			list_for_each_entry(iolink3, &cpu_dev->io_link_props, list)
1453 				if (iolink3->node_to == iolink2->node_to)
1454 					break;
1455 
1456 			props->weight += iolink3->weight;
1457 			props->min_latency += iolink3->min_latency;
1458 			props->max_latency += iolink3->max_latency;
1459 			props->min_bandwidth = min(props->min_bandwidth,
1460 							iolink3->min_bandwidth);
1461 			props->max_bandwidth = min(props->max_bandwidth,
1462 							iolink3->max_bandwidth);
1463 		} else {
1464 			WARN(1, "CPU node not found");
1465 		}
1466 	}
1467 
1468 	props->node_from = from;
1469 	props->node_to = to;
1470 	peer->node_props.p2p_links_count++;
1471 	list_add_tail(&props->list, &peer->p2p_link_props);
1472 	ret = kfd_build_p2p_node_entry(peer, props);
1473 
1474 	return ret;
1475 }
1476 #endif
1477 
1478 static int kfd_dev_create_p2p_links(void)
1479 {
1480 	struct kfd_topology_device *dev;
1481 	struct kfd_topology_device *new_dev;
1482 #if defined(CONFIG_HSA_AMD_P2P)
1483 	uint32_t i;
1484 #endif
1485 	uint32_t k;
1486 	int ret = 0;
1487 
1488 	k = 0;
1489 	list_for_each_entry(dev, &topology_device_list, list)
1490 		k++;
1491 	if (k < 2)
1492 		return 0;
1493 
1494 	new_dev = list_last_entry(&topology_device_list, struct kfd_topology_device, list);
1495 	if (WARN_ON(!new_dev->gpu))
1496 		return 0;
1497 
1498 	k--;
1499 
1500 	/* create in-direct links */
1501 	ret = kfd_create_indirect_link_prop(new_dev, k);
1502 	if (ret < 0)
1503 		goto out;
1504 
1505 	/* create p2p links */
1506 #if defined(CONFIG_HSA_AMD_P2P)
1507 	i = 0;
1508 	list_for_each_entry(dev, &topology_device_list, list) {
1509 		if (dev == new_dev)
1510 			break;
1511 		if (!dev->gpu || !dev->gpu->adev ||
1512 		    (dev->gpu->kfd->hive_id &&
1513 		     dev->gpu->kfd->hive_id == new_dev->gpu->kfd->hive_id))
1514 			goto next;
1515 
1516 		/* check if node(s) is/are peer accessible in one direction or bi-direction */
1517 		ret = kfd_add_peer_prop(new_dev, dev, i, k);
1518 		if (ret < 0)
1519 			goto out;
1520 
1521 		ret = kfd_add_peer_prop(dev, new_dev, k, i);
1522 		if (ret < 0)
1523 			goto out;
1524 next:
1525 		i++;
1526 	}
1527 #endif
1528 
1529 out:
1530 	return ret;
1531 }
1532 
1533 /* Helper function. See kfd_fill_gpu_cache_info for parameter description */
1534 static int fill_in_l1_pcache(struct kfd_cache_properties **props_ext,
1535 				struct kfd_gpu_cache_info *pcache_info,
1536 				struct kfd_cu_info *cu_info,
1537 				int cu_bitmask,
1538 				int cache_type, unsigned int cu_processor_id,
1539 				int cu_block)
1540 {
1541 	unsigned int cu_sibling_map_mask;
1542 	int first_active_cu;
1543 	struct kfd_cache_properties *pcache = NULL;
1544 
1545 	cu_sibling_map_mask = cu_bitmask;
1546 	cu_sibling_map_mask >>= cu_block;
1547 	cu_sibling_map_mask &= ((1 << pcache_info[cache_type].num_cu_shared) - 1);
1548 	first_active_cu = ffs(cu_sibling_map_mask);
1549 
1550 	/* CU could be inactive. In case of shared cache find the first active
1551 	 * CU. and incase of non-shared cache check if the CU is inactive. If
1552 	 * inactive active skip it
1553 	 */
1554 	if (first_active_cu) {
1555 		pcache = kfd_alloc_struct(pcache);
1556 		if (!pcache)
1557 			return -ENOMEM;
1558 
1559 		memset(pcache, 0, sizeof(struct kfd_cache_properties));
1560 		pcache->processor_id_low = cu_processor_id + (first_active_cu - 1);
1561 		pcache->cache_level = pcache_info[cache_type].cache_level;
1562 		pcache->cache_size = pcache_info[cache_type].cache_size;
1563 
1564 		if (pcache_info[cache_type].flags & CRAT_CACHE_FLAGS_DATA_CACHE)
1565 			pcache->cache_type |= HSA_CACHE_TYPE_DATA;
1566 		if (pcache_info[cache_type].flags & CRAT_CACHE_FLAGS_INST_CACHE)
1567 			pcache->cache_type |= HSA_CACHE_TYPE_INSTRUCTION;
1568 		if (pcache_info[cache_type].flags & CRAT_CACHE_FLAGS_CPU_CACHE)
1569 			pcache->cache_type |= HSA_CACHE_TYPE_CPU;
1570 		if (pcache_info[cache_type].flags & CRAT_CACHE_FLAGS_SIMD_CACHE)
1571 			pcache->cache_type |= HSA_CACHE_TYPE_HSACU;
1572 
1573 		/* Sibling map is w.r.t processor_id_low, so shift out
1574 		 * inactive CU
1575 		 */
1576 		cu_sibling_map_mask =
1577 			cu_sibling_map_mask >> (first_active_cu - 1);
1578 
1579 		pcache->sibling_map[0] = (uint8_t)(cu_sibling_map_mask & 0xFF);
1580 		pcache->sibling_map[1] =
1581 				(uint8_t)((cu_sibling_map_mask >> 8) & 0xFF);
1582 		pcache->sibling_map[2] =
1583 				(uint8_t)((cu_sibling_map_mask >> 16) & 0xFF);
1584 		pcache->sibling_map[3] =
1585 				(uint8_t)((cu_sibling_map_mask >> 24) & 0xFF);
1586 
1587 		pcache->sibling_map_size = 4;
1588 		*props_ext = pcache;
1589 
1590 		return 0;
1591 	}
1592 	return 1;
1593 }
1594 
1595 /* Helper function. See kfd_fill_gpu_cache_info for parameter description */
1596 static int fill_in_l2_l3_pcache(struct kfd_cache_properties **props_ext,
1597 				struct kfd_gpu_cache_info *pcache_info,
1598 				struct kfd_cu_info *cu_info,
1599 				int cache_type, unsigned int cu_processor_id,
1600 				struct kfd_node *knode)
1601 {
1602 	unsigned int cu_sibling_map_mask;
1603 	int first_active_cu;
1604 	int i, j, k, xcc, start, end;
1605 	struct kfd_cache_properties *pcache = NULL;
1606 
1607 	start = ffs(knode->xcc_mask) - 1;
1608 	end = start + NUM_XCC(knode->xcc_mask);
1609 	cu_sibling_map_mask = cu_info->cu_bitmap[start][0][0];
1610 	cu_sibling_map_mask &=
1611 		((1 << pcache_info[cache_type].num_cu_shared) - 1);
1612 	first_active_cu = ffs(cu_sibling_map_mask);
1613 
1614 	/* CU could be inactive. In case of shared cache find the first active
1615 	 * CU. and incase of non-shared cache check if the CU is inactive. If
1616 	 * inactive active skip it
1617 	 */
1618 	if (first_active_cu) {
1619 		pcache = kfd_alloc_struct(pcache);
1620 		if (!pcache)
1621 			return -ENOMEM;
1622 
1623 		memset(pcache, 0, sizeof(struct kfd_cache_properties));
1624 		pcache->processor_id_low = cu_processor_id
1625 					+ (first_active_cu - 1);
1626 		pcache->cache_level = pcache_info[cache_type].cache_level;
1627 		pcache->cache_size = pcache_info[cache_type].cache_size;
1628 
1629 		if (pcache_info[cache_type].flags & CRAT_CACHE_FLAGS_DATA_CACHE)
1630 			pcache->cache_type |= HSA_CACHE_TYPE_DATA;
1631 		if (pcache_info[cache_type].flags & CRAT_CACHE_FLAGS_INST_CACHE)
1632 			pcache->cache_type |= HSA_CACHE_TYPE_INSTRUCTION;
1633 		if (pcache_info[cache_type].flags & CRAT_CACHE_FLAGS_CPU_CACHE)
1634 			pcache->cache_type |= HSA_CACHE_TYPE_CPU;
1635 		if (pcache_info[cache_type].flags & CRAT_CACHE_FLAGS_SIMD_CACHE)
1636 			pcache->cache_type |= HSA_CACHE_TYPE_HSACU;
1637 
1638 		/* Sibling map is w.r.t processor_id_low, so shift out
1639 		 * inactive CU
1640 		 */
1641 		cu_sibling_map_mask = cu_sibling_map_mask >> (first_active_cu - 1);
1642 		k = 0;
1643 
1644 		for (xcc = start; xcc < end; xcc++) {
1645 			for (i = 0; i < cu_info->num_shader_engines; i++) {
1646 				for (j = 0; j < cu_info->num_shader_arrays_per_engine; j++) {
1647 					pcache->sibling_map[k] = (uint8_t)(cu_sibling_map_mask & 0xFF);
1648 					pcache->sibling_map[k+1] = (uint8_t)((cu_sibling_map_mask >> 8) & 0xFF);
1649 					pcache->sibling_map[k+2] = (uint8_t)((cu_sibling_map_mask >> 16) & 0xFF);
1650 					pcache->sibling_map[k+3] = (uint8_t)((cu_sibling_map_mask >> 24) & 0xFF);
1651 					k += 4;
1652 
1653 					cu_sibling_map_mask = cu_info->cu_bitmap[xcc][i % 4][j + i / 4];
1654 					cu_sibling_map_mask &= ((1 << pcache_info[cache_type].num_cu_shared) - 1);
1655 				}
1656 			}
1657 		}
1658 		pcache->sibling_map_size = k;
1659 		*props_ext = pcache;
1660 		return 0;
1661 	}
1662 	return 1;
1663 }
1664 
1665 #define KFD_MAX_CACHE_TYPES 6
1666 
1667 /* kfd_fill_cache_non_crat_info - Fill GPU cache info using kfd_gpu_cache_info
1668  * tables
1669  */
1670 static void kfd_fill_cache_non_crat_info(struct kfd_topology_device *dev, struct kfd_node *kdev)
1671 {
1672 	struct kfd_gpu_cache_info *pcache_info = NULL;
1673 	int i, j, k, xcc, start, end;
1674 	int ct = 0;
1675 	unsigned int cu_processor_id;
1676 	int ret;
1677 	unsigned int num_cu_shared;
1678 	struct kfd_cu_info cu_info;
1679 	struct kfd_cu_info *pcu_info;
1680 	int gpu_processor_id;
1681 	struct kfd_cache_properties *props_ext;
1682 	int num_of_entries = 0;
1683 	int num_of_cache_types = 0;
1684 	struct kfd_gpu_cache_info cache_info[KFD_MAX_CACHE_TYPES];
1685 
1686 	amdgpu_amdkfd_get_cu_info(kdev->adev, &cu_info);
1687 	pcu_info = &cu_info;
1688 
1689 	gpu_processor_id = dev->node_props.simd_id_base;
1690 
1691 	pcache_info = cache_info;
1692 	num_of_cache_types = kfd_get_gpu_cache_info(kdev, &pcache_info);
1693 	if (!num_of_cache_types) {
1694 		pr_warn("no cache info found\n");
1695 		return;
1696 	}
1697 
1698 	/* For each type of cache listed in the kfd_gpu_cache_info table,
1699 	 * go through all available Compute Units.
1700 	 * The [i,j,k] loop will
1701 	 *		if kfd_gpu_cache_info.num_cu_shared = 1
1702 	 *			will parse through all available CU
1703 	 *		If (kfd_gpu_cache_info.num_cu_shared != 1)
1704 	 *			then it will consider only one CU from
1705 	 *			the shared unit
1706 	 */
1707 	start = ffs(kdev->xcc_mask) - 1;
1708 	end = start + NUM_XCC(kdev->xcc_mask);
1709 
1710 	for (ct = 0; ct < num_of_cache_types; ct++) {
1711 		cu_processor_id = gpu_processor_id;
1712 		if (pcache_info[ct].cache_level == 1) {
1713 			for (xcc = start; xcc < end; xcc++) {
1714 				for (i = 0; i < pcu_info->num_shader_engines; i++) {
1715 					for (j = 0; j < pcu_info->num_shader_arrays_per_engine; j++) {
1716 						for (k = 0; k < pcu_info->num_cu_per_sh; k += pcache_info[ct].num_cu_shared) {
1717 
1718 							ret = fill_in_l1_pcache(&props_ext, pcache_info, pcu_info,
1719 										pcu_info->cu_bitmap[xcc][i % 4][j + i / 4], ct,
1720 										cu_processor_id, k);
1721 
1722 							if (ret < 0)
1723 								break;
1724 
1725 							if (!ret) {
1726 								num_of_entries++;
1727 								list_add_tail(&props_ext->list, &dev->cache_props);
1728 							}
1729 
1730 							/* Move to next CU block */
1731 							num_cu_shared = ((k + pcache_info[ct].num_cu_shared) <=
1732 								pcu_info->num_cu_per_sh) ?
1733 								pcache_info[ct].num_cu_shared :
1734 								(pcu_info->num_cu_per_sh - k);
1735 							cu_processor_id += num_cu_shared;
1736 						}
1737 					}
1738 				}
1739 			}
1740 		} else {
1741 			ret = fill_in_l2_l3_pcache(&props_ext, pcache_info,
1742 					pcu_info, ct, cu_processor_id, kdev);
1743 
1744 			if (ret < 0)
1745 				break;
1746 
1747 			if (!ret) {
1748 				num_of_entries++;
1749 				list_add_tail(&props_ext->list, &dev->cache_props);
1750 			}
1751 		}
1752 	}
1753 	dev->node_props.caches_count += num_of_entries;
1754 	pr_debug("Added [%d] GPU cache entries\n", num_of_entries);
1755 }
1756 
1757 static int kfd_topology_add_device_locked(struct kfd_node *gpu, uint32_t gpu_id,
1758 					  struct kfd_topology_device **dev)
1759 {
1760 	int proximity_domain = ++topology_crat_proximity_domain;
1761 	struct list_head temp_topology_device_list;
1762 	void *crat_image = NULL;
1763 	size_t image_size = 0;
1764 	int res;
1765 
1766 	res = kfd_create_crat_image_virtual(&crat_image, &image_size,
1767 					    COMPUTE_UNIT_GPU, gpu,
1768 					    proximity_domain);
1769 	if (res) {
1770 		pr_err("Error creating VCRAT for GPU (ID: 0x%x)\n",
1771 		       gpu_id);
1772 		topology_crat_proximity_domain--;
1773 		goto err;
1774 	}
1775 
1776 	INIT_LIST_HEAD(&temp_topology_device_list);
1777 
1778 	res = kfd_parse_crat_table(crat_image,
1779 				   &temp_topology_device_list,
1780 				   proximity_domain);
1781 	if (res) {
1782 		pr_err("Error parsing VCRAT for GPU (ID: 0x%x)\n",
1783 		       gpu_id);
1784 		topology_crat_proximity_domain--;
1785 		goto err;
1786 	}
1787 
1788 	kfd_topology_update_device_list(&temp_topology_device_list,
1789 					&topology_device_list);
1790 
1791 	*dev = kfd_assign_gpu(gpu);
1792 	if (WARN_ON(!*dev)) {
1793 		res = -ENODEV;
1794 		goto err;
1795 	}
1796 
1797 	/* Fill the cache affinity information here for the GPUs
1798 	 * using VCRAT
1799 	 */
1800 	kfd_fill_cache_non_crat_info(*dev, gpu);
1801 
1802 	/* Update the SYSFS tree, since we added another topology
1803 	 * device
1804 	 */
1805 	res = kfd_topology_update_sysfs();
1806 	if (!res)
1807 		sys_props.generation_count++;
1808 	else
1809 		pr_err("Failed to update GPU (ID: 0x%x) to sysfs topology. res=%d\n",
1810 		       gpu_id, res);
1811 
1812 err:
1813 	kfd_destroy_crat_image(crat_image);
1814 	return res;
1815 }
1816 
1817 static void kfd_topology_set_dbg_firmware_support(struct kfd_topology_device *dev)
1818 {
1819 	bool firmware_supported = true;
1820 
1821 	if (KFD_GC_VERSION(dev->gpu) >= IP_VERSION(11, 0, 0) &&
1822 			KFD_GC_VERSION(dev->gpu) < IP_VERSION(12, 0, 0)) {
1823 		uint32_t mes_api_rev = (dev->gpu->adev->mes.sched_version &
1824 						AMDGPU_MES_API_VERSION_MASK) >>
1825 						AMDGPU_MES_API_VERSION_SHIFT;
1826 		uint32_t mes_rev = dev->gpu->adev->mes.sched_version &
1827 						AMDGPU_MES_VERSION_MASK;
1828 
1829 		firmware_supported = (mes_api_rev >= 14) && (mes_rev >= 64);
1830 		goto out;
1831 	}
1832 
1833 	/*
1834 	 * Note: Any unlisted devices here are assumed to support exception handling.
1835 	 * Add additional checks here as needed.
1836 	 */
1837 	switch (KFD_GC_VERSION(dev->gpu)) {
1838 	case IP_VERSION(9, 0, 1):
1839 		firmware_supported = dev->gpu->kfd->mec_fw_version >= 459 + 32768;
1840 		break;
1841 	case IP_VERSION(9, 1, 0):
1842 	case IP_VERSION(9, 2, 1):
1843 	case IP_VERSION(9, 2, 2):
1844 	case IP_VERSION(9, 3, 0):
1845 	case IP_VERSION(9, 4, 0):
1846 		firmware_supported = dev->gpu->kfd->mec_fw_version >= 459;
1847 		break;
1848 	case IP_VERSION(9, 4, 1):
1849 		firmware_supported = dev->gpu->kfd->mec_fw_version >= 60;
1850 		break;
1851 	case IP_VERSION(9, 4, 2):
1852 		firmware_supported = dev->gpu->kfd->mec_fw_version >= 51;
1853 		break;
1854 	case IP_VERSION(10, 1, 10):
1855 	case IP_VERSION(10, 1, 2):
1856 	case IP_VERSION(10, 1, 1):
1857 		firmware_supported = dev->gpu->kfd->mec_fw_version >= 144;
1858 		break;
1859 	case IP_VERSION(10, 3, 0):
1860 	case IP_VERSION(10, 3, 2):
1861 	case IP_VERSION(10, 3, 1):
1862 	case IP_VERSION(10, 3, 4):
1863 	case IP_VERSION(10, 3, 5):
1864 		firmware_supported = dev->gpu->kfd->mec_fw_version >= 89;
1865 		break;
1866 	case IP_VERSION(10, 1, 3):
1867 	case IP_VERSION(10, 3, 3):
1868 		firmware_supported = false;
1869 		break;
1870 	default:
1871 		break;
1872 	}
1873 
1874 out:
1875 	if (firmware_supported)
1876 		dev->node_props.capability |= HSA_CAP_TRAP_DEBUG_FIRMWARE_SUPPORTED;
1877 }
1878 
1879 static void kfd_topology_set_capabilities(struct kfd_topology_device *dev)
1880 {
1881 	dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_2_0 <<
1882 				HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
1883 				HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
1884 
1885 	dev->node_props.capability |= HSA_CAP_TRAP_DEBUG_SUPPORT |
1886 			HSA_CAP_TRAP_DEBUG_WAVE_LAUNCH_TRAP_OVERRIDE_SUPPORTED |
1887 			HSA_CAP_TRAP_DEBUG_WAVE_LAUNCH_MODE_SUPPORTED;
1888 
1889 	if (kfd_dbg_has_ttmps_always_setup(dev->gpu))
1890 		dev->node_props.debug_prop |= HSA_DBG_DISPATCH_INFO_ALWAYS_VALID;
1891 
1892 	if (KFD_GC_VERSION(dev->gpu) < IP_VERSION(10, 0, 0)) {
1893 		if (KFD_GC_VERSION(dev->gpu) == IP_VERSION(9, 4, 3))
1894 			dev->node_props.debug_prop |=
1895 				HSA_DBG_WATCH_ADDR_MASK_LO_BIT_GFX9_4_3 |
1896 				HSA_DBG_WATCH_ADDR_MASK_HI_BIT_GFX9_4_3;
1897 		else
1898 			dev->node_props.debug_prop |=
1899 				HSA_DBG_WATCH_ADDR_MASK_LO_BIT_GFX9 |
1900 				HSA_DBG_WATCH_ADDR_MASK_HI_BIT;
1901 
1902 		if (KFD_GC_VERSION(dev->gpu) >= IP_VERSION(9, 4, 2))
1903 			dev->node_props.capability |=
1904 				HSA_CAP_TRAP_DEBUG_PRECISE_MEMORY_OPERATIONS_SUPPORTED;
1905 	} else {
1906 		dev->node_props.debug_prop |= HSA_DBG_WATCH_ADDR_MASK_LO_BIT_GFX10 |
1907 					HSA_DBG_WATCH_ADDR_MASK_HI_BIT;
1908 
1909 		if (KFD_GC_VERSION(dev->gpu) >= IP_VERSION(11, 0, 0))
1910 			dev->node_props.capability |=
1911 				HSA_CAP_TRAP_DEBUG_PRECISE_MEMORY_OPERATIONS_SUPPORTED;
1912 	}
1913 
1914 	kfd_topology_set_dbg_firmware_support(dev);
1915 }
1916 
1917 int kfd_topology_add_device(struct kfd_node *gpu)
1918 {
1919 	uint32_t gpu_id;
1920 	struct kfd_topology_device *dev;
1921 	struct kfd_cu_info cu_info;
1922 	int res = 0;
1923 	int i;
1924 	const char *asic_name = amdgpu_asic_name[gpu->adev->asic_type];
1925 
1926 	gpu_id = kfd_generate_gpu_id(gpu);
1927 	if (gpu->xcp && !gpu->xcp->ddev) {
1928 		dev_warn(gpu->adev->dev,
1929 		"Won't add GPU (ID: 0x%x) to topology since it has no drm node assigned.",
1930 		gpu_id);
1931 		return 0;
1932 	} else {
1933 		pr_debug("Adding new GPU (ID: 0x%x) to topology\n", gpu_id);
1934 	}
1935 
1936 	/* Check to see if this gpu device exists in the topology_device_list.
1937 	 * If so, assign the gpu to that device,
1938 	 * else create a Virtual CRAT for this gpu device and then parse that
1939 	 * CRAT to create a new topology device. Once created assign the gpu to
1940 	 * that topology device
1941 	 */
1942 	down_write(&topology_lock);
1943 	dev = kfd_assign_gpu(gpu);
1944 	if (!dev)
1945 		res = kfd_topology_add_device_locked(gpu, gpu_id, &dev);
1946 	up_write(&topology_lock);
1947 	if (res)
1948 		return res;
1949 
1950 	dev->gpu_id = gpu_id;
1951 	gpu->id = gpu_id;
1952 
1953 	kfd_dev_create_p2p_links();
1954 
1955 	/* TODO: Move the following lines to function
1956 	 *	kfd_add_non_crat_information
1957 	 */
1958 
1959 	/* Fill-in additional information that is not available in CRAT but
1960 	 * needed for the topology
1961 	 */
1962 
1963 	amdgpu_amdkfd_get_cu_info(dev->gpu->adev, &cu_info);
1964 
1965 	for (i = 0; i < KFD_TOPOLOGY_PUBLIC_NAME_SIZE-1; i++) {
1966 		dev->node_props.name[i] = __tolower(asic_name[i]);
1967 		if (asic_name[i] == '\0')
1968 			break;
1969 	}
1970 	dev->node_props.name[i] = '\0';
1971 
1972 	dev->node_props.simd_arrays_per_engine =
1973 		cu_info.num_shader_arrays_per_engine;
1974 
1975 	dev->node_props.gfx_target_version =
1976 				gpu->kfd->device_info.gfx_target_version;
1977 	dev->node_props.vendor_id = gpu->adev->pdev->vendor;
1978 	dev->node_props.device_id = gpu->adev->pdev->device;
1979 	dev->node_props.capability |=
1980 		((dev->gpu->adev->rev_id << HSA_CAP_ASIC_REVISION_SHIFT) &
1981 			HSA_CAP_ASIC_REVISION_MASK);
1982 
1983 	dev->node_props.location_id = pci_dev_id(gpu->adev->pdev);
1984 	if (KFD_GC_VERSION(dev->gpu->kfd) == IP_VERSION(9, 4, 3))
1985 		dev->node_props.location_id |= dev->gpu->node_id;
1986 
1987 	dev->node_props.domain = pci_domain_nr(gpu->adev->pdev->bus);
1988 	dev->node_props.max_engine_clk_fcompute =
1989 		amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->adev);
1990 	dev->node_props.max_engine_clk_ccompute =
1991 		cpufreq_quick_get_max(0) / 1000;
1992 
1993 	if (gpu->xcp)
1994 		dev->node_props.drm_render_minor = gpu->xcp->ddev->render->index;
1995 	else
1996 		dev->node_props.drm_render_minor =
1997 				gpu->kfd->shared_resources.drm_render_minor;
1998 
1999 	dev->node_props.hive_id = gpu->kfd->hive_id;
2000 	dev->node_props.num_sdma_engines = kfd_get_num_sdma_engines(gpu);
2001 	dev->node_props.num_sdma_xgmi_engines =
2002 					kfd_get_num_xgmi_sdma_engines(gpu);
2003 	dev->node_props.num_sdma_queues_per_engine =
2004 				gpu->kfd->device_info.num_sdma_queues_per_engine -
2005 				gpu->kfd->device_info.num_reserved_sdma_queues_per_engine;
2006 	dev->node_props.num_gws = (dev->gpu->gws &&
2007 		dev->gpu->dqm->sched_policy != KFD_SCHED_POLICY_NO_HWS) ?
2008 		dev->gpu->adev->gds.gws_size : 0;
2009 	dev->node_props.num_cp_queues = get_cp_queues_num(dev->gpu->dqm);
2010 
2011 	kfd_fill_mem_clk_max_info(dev);
2012 	kfd_fill_iolink_non_crat_info(dev);
2013 
2014 	switch (dev->gpu->adev->asic_type) {
2015 	case CHIP_KAVERI:
2016 	case CHIP_HAWAII:
2017 	case CHIP_TONGA:
2018 		dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_PRE_1_0 <<
2019 			HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
2020 			HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
2021 		break;
2022 	case CHIP_CARRIZO:
2023 	case CHIP_FIJI:
2024 	case CHIP_POLARIS10:
2025 	case CHIP_POLARIS11:
2026 	case CHIP_POLARIS12:
2027 	case CHIP_VEGAM:
2028 		pr_debug("Adding doorbell packet type capability\n");
2029 		dev->node_props.capability |= ((HSA_CAP_DOORBELL_TYPE_1_0 <<
2030 			HSA_CAP_DOORBELL_TYPE_TOTALBITS_SHIFT) &
2031 			HSA_CAP_DOORBELL_TYPE_TOTALBITS_MASK);
2032 		break;
2033 	default:
2034 		if (KFD_GC_VERSION(dev->gpu) < IP_VERSION(9, 0, 1))
2035 			WARN(1, "Unexpected ASIC family %u",
2036 			     dev->gpu->adev->asic_type);
2037 		else
2038 			kfd_topology_set_capabilities(dev);
2039 	}
2040 
2041 	/*
2042 	 * Overwrite ATS capability according to needs_iommu_device to fix
2043 	 * potential missing corresponding bit in CRAT of BIOS.
2044 	 */
2045 	dev->node_props.capability &= ~HSA_CAP_ATS_PRESENT;
2046 
2047 	/* Fix errors in CZ CRAT.
2048 	 * simd_count: Carrizo CRAT reports wrong simd_count, probably
2049 	 *		because it doesn't consider masked out CUs
2050 	 * max_waves_per_simd: Carrizo reports wrong max_waves_per_simd
2051 	 */
2052 	if (dev->gpu->adev->asic_type == CHIP_CARRIZO) {
2053 		dev->node_props.simd_count =
2054 			cu_info.simd_per_cu * cu_info.cu_active_number;
2055 		dev->node_props.max_waves_per_simd = 10;
2056 	}
2057 
2058 	/* kfd only concerns sram ecc on GFX and HBM ecc on UMC */
2059 	dev->node_props.capability |=
2060 		((dev->gpu->adev->ras_enabled & BIT(AMDGPU_RAS_BLOCK__GFX)) != 0) ?
2061 		HSA_CAP_SRAM_EDCSUPPORTED : 0;
2062 	dev->node_props.capability |=
2063 		((dev->gpu->adev->ras_enabled & BIT(AMDGPU_RAS_BLOCK__UMC)) != 0) ?
2064 		HSA_CAP_MEM_EDCSUPPORTED : 0;
2065 
2066 	if (KFD_GC_VERSION(dev->gpu) != IP_VERSION(9, 0, 1))
2067 		dev->node_props.capability |= (dev->gpu->adev->ras_enabled != 0) ?
2068 			HSA_CAP_RASEVENTNOTIFY : 0;
2069 
2070 	if (KFD_IS_SVM_API_SUPPORTED(dev->gpu->adev))
2071 		dev->node_props.capability |= HSA_CAP_SVMAPI_SUPPORTED;
2072 
2073 	if (dev->gpu->adev->gmc.is_app_apu ||
2074 		dev->gpu->adev->gmc.xgmi.connected_to_cpu)
2075 		dev->node_props.capability |= HSA_CAP_FLAGS_COHERENTHOSTACCESS;
2076 
2077 	kfd_debug_print_topology();
2078 
2079 	kfd_notify_gpu_change(gpu_id, 1);
2080 
2081 	return 0;
2082 }
2083 
2084 /**
2085  * kfd_topology_update_io_links() - Update IO links after device removal.
2086  * @proximity_domain: Proximity domain value of the dev being removed.
2087  *
2088  * The topology list currently is arranged in increasing order of
2089  * proximity domain.
2090  *
2091  * Two things need to be done when a device is removed:
2092  * 1. All the IO links to this device need to be removed.
2093  * 2. All nodes after the current device node need to move
2094  *    up once this device node is removed from the topology
2095  *    list. As a result, the proximity domain values for
2096  *    all nodes after the node being deleted reduce by 1.
2097  *    This would also cause the proximity domain values for
2098  *    io links to be updated based on new proximity domain
2099  *    values.
2100  *
2101  * Context: The caller must hold write topology_lock.
2102  */
2103 static void kfd_topology_update_io_links(int proximity_domain)
2104 {
2105 	struct kfd_topology_device *dev;
2106 	struct kfd_iolink_properties *iolink, *p2plink, *tmp;
2107 
2108 	list_for_each_entry(dev, &topology_device_list, list) {
2109 		if (dev->proximity_domain > proximity_domain)
2110 			dev->proximity_domain--;
2111 
2112 		list_for_each_entry_safe(iolink, tmp, &dev->io_link_props, list) {
2113 			/*
2114 			 * If there is an io link to the dev being deleted
2115 			 * then remove that IO link also.
2116 			 */
2117 			if (iolink->node_to == proximity_domain) {
2118 				list_del(&iolink->list);
2119 				dev->node_props.io_links_count--;
2120 			} else {
2121 				if (iolink->node_from > proximity_domain)
2122 					iolink->node_from--;
2123 				if (iolink->node_to > proximity_domain)
2124 					iolink->node_to--;
2125 			}
2126 		}
2127 
2128 		list_for_each_entry_safe(p2plink, tmp, &dev->p2p_link_props, list) {
2129 			/*
2130 			 * If there is a p2p link to the dev being deleted
2131 			 * then remove that p2p link also.
2132 			 */
2133 			if (p2plink->node_to == proximity_domain) {
2134 				list_del(&p2plink->list);
2135 				dev->node_props.p2p_links_count--;
2136 			} else {
2137 				if (p2plink->node_from > proximity_domain)
2138 					p2plink->node_from--;
2139 				if (p2plink->node_to > proximity_domain)
2140 					p2plink->node_to--;
2141 			}
2142 		}
2143 	}
2144 }
2145 
2146 int kfd_topology_remove_device(struct kfd_node *gpu)
2147 {
2148 	struct kfd_topology_device *dev, *tmp;
2149 	uint32_t gpu_id;
2150 	int res = -ENODEV;
2151 	int i = 0;
2152 
2153 	down_write(&topology_lock);
2154 
2155 	list_for_each_entry_safe(dev, tmp, &topology_device_list, list) {
2156 		if (dev->gpu == gpu) {
2157 			gpu_id = dev->gpu_id;
2158 			kfd_remove_sysfs_node_entry(dev);
2159 			kfd_release_topology_device(dev);
2160 			sys_props.num_devices--;
2161 			kfd_topology_update_io_links(i);
2162 			topology_crat_proximity_domain = sys_props.num_devices-1;
2163 			sys_props.generation_count++;
2164 			res = 0;
2165 			if (kfd_topology_update_sysfs() < 0)
2166 				kfd_topology_release_sysfs();
2167 			break;
2168 		}
2169 		i++;
2170 	}
2171 
2172 	up_write(&topology_lock);
2173 
2174 	if (!res)
2175 		kfd_notify_gpu_change(gpu_id, 0);
2176 
2177 	return res;
2178 }
2179 
2180 /* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD
2181  *	topology. If GPU device is found @idx, then valid kfd_dev pointer is
2182  *	returned through @kdev
2183  * Return -	0: On success (@kdev will be NULL for non GPU nodes)
2184  *		-1: If end of list
2185  */
2186 int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_node **kdev)
2187 {
2188 
2189 	struct kfd_topology_device *top_dev;
2190 	uint8_t device_idx = 0;
2191 
2192 	*kdev = NULL;
2193 	down_read(&topology_lock);
2194 
2195 	list_for_each_entry(top_dev, &topology_device_list, list) {
2196 		if (device_idx == idx) {
2197 			*kdev = top_dev->gpu;
2198 			up_read(&topology_lock);
2199 			return 0;
2200 		}
2201 
2202 		device_idx++;
2203 	}
2204 
2205 	up_read(&topology_lock);
2206 
2207 	return -1;
2208 
2209 }
2210 
2211 static int kfd_cpumask_to_apic_id(const struct cpumask *cpumask)
2212 {
2213 	int first_cpu_of_numa_node;
2214 
2215 	if (!cpumask || cpumask == cpu_none_mask)
2216 		return -1;
2217 	first_cpu_of_numa_node = cpumask_first(cpumask);
2218 	if (first_cpu_of_numa_node >= nr_cpu_ids)
2219 		return -1;
2220 #ifdef CONFIG_X86_64
2221 	return cpu_data(first_cpu_of_numa_node).apicid;
2222 #else
2223 	return first_cpu_of_numa_node;
2224 #endif
2225 }
2226 
2227 /* kfd_numa_node_to_apic_id - Returns the APIC ID of the first logical processor
2228  *	of the given NUMA node (numa_node_id)
2229  * Return -1 on failure
2230  */
2231 int kfd_numa_node_to_apic_id(int numa_node_id)
2232 {
2233 	if (numa_node_id == -1) {
2234 		pr_warn("Invalid NUMA Node. Use online CPU mask\n");
2235 		return kfd_cpumask_to_apic_id(cpu_online_mask);
2236 	}
2237 	return kfd_cpumask_to_apic_id(cpumask_of_node(numa_node_id));
2238 }
2239 
2240 #if defined(CONFIG_DEBUG_FS)
2241 
2242 int kfd_debugfs_hqds_by_device(struct seq_file *m, void *data)
2243 {
2244 	struct kfd_topology_device *dev;
2245 	unsigned int i = 0;
2246 	int r = 0;
2247 
2248 	down_read(&topology_lock);
2249 
2250 	list_for_each_entry(dev, &topology_device_list, list) {
2251 		if (!dev->gpu) {
2252 			i++;
2253 			continue;
2254 		}
2255 
2256 		seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
2257 		r = dqm_debugfs_hqds(m, dev->gpu->dqm);
2258 		if (r)
2259 			break;
2260 	}
2261 
2262 	up_read(&topology_lock);
2263 
2264 	return r;
2265 }
2266 
2267 int kfd_debugfs_rls_by_device(struct seq_file *m, void *data)
2268 {
2269 	struct kfd_topology_device *dev;
2270 	unsigned int i = 0;
2271 	int r = 0;
2272 
2273 	down_read(&topology_lock);
2274 
2275 	list_for_each_entry(dev, &topology_device_list, list) {
2276 		if (!dev->gpu) {
2277 			i++;
2278 			continue;
2279 		}
2280 
2281 		seq_printf(m, "Node %u, gpu_id %x:\n", i++, dev->gpu->id);
2282 		r = pm_debugfs_runlist(m, &dev->gpu->dqm->packet_mgr);
2283 		if (r)
2284 			break;
2285 	}
2286 
2287 	up_read(&topology_lock);
2288 
2289 	return r;
2290 }
2291 
2292 #endif
2293