1
2
3
4#include <linux/kernel.h>
5#include <linux/bitops.h>
6
7#include "spectrum.h"
8
9#define MLXSW_SP1_KVDL_SINGLE_BASE 0
10#define MLXSW_SP1_KVDL_SINGLE_SIZE 16384
11#define MLXSW_SP1_KVDL_SINGLE_END \
12 (MLXSW_SP1_KVDL_SINGLE_SIZE + MLXSW_SP1_KVDL_SINGLE_BASE - 1)
13
14#define MLXSW_SP1_KVDL_CHUNKS_BASE \
15 (MLXSW_SP1_KVDL_SINGLE_BASE + MLXSW_SP1_KVDL_SINGLE_SIZE)
16#define MLXSW_SP1_KVDL_CHUNKS_SIZE 49152
17#define MLXSW_SP1_KVDL_CHUNKS_END \
18 (MLXSW_SP1_KVDL_CHUNKS_SIZE + MLXSW_SP1_KVDL_CHUNKS_BASE - 1)
19
20#define MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE \
21 (MLXSW_SP1_KVDL_CHUNKS_BASE + MLXSW_SP1_KVDL_CHUNKS_SIZE)
22#define MLXSW_SP1_KVDL_LARGE_CHUNKS_SIZE \
23 (MLXSW_SP_KVD_LINEAR_SIZE - MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE)
24#define MLXSW_SP1_KVDL_LARGE_CHUNKS_END \
25 (MLXSW_SP1_KVDL_LARGE_CHUNKS_SIZE + MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE - 1)
26
27#define MLXSW_SP1_KVDL_SINGLE_ALLOC_SIZE 1
28#define MLXSW_SP1_KVDL_CHUNKS_ALLOC_SIZE 32
29#define MLXSW_SP1_KVDL_LARGE_CHUNKS_ALLOC_SIZE 512
30
31struct mlxsw_sp1_kvdl_part_info {
32 unsigned int part_index;
33 unsigned int start_index;
34 unsigned int end_index;
35 unsigned int alloc_size;
36 enum mlxsw_sp_resource_id resource_id;
37};
38
39enum mlxsw_sp1_kvdl_part_id {
40 MLXSW_SP1_KVDL_PART_ID_SINGLE,
41 MLXSW_SP1_KVDL_PART_ID_CHUNKS,
42 MLXSW_SP1_KVDL_PART_ID_LARGE_CHUNKS,
43};
44
45#define MLXSW_SP1_KVDL_PART_INFO(id) \
46[MLXSW_SP1_KVDL_PART_ID_##id] = { \
47 .start_index = MLXSW_SP1_KVDL_##id##_BASE, \
48 .end_index = MLXSW_SP1_KVDL_##id##_END, \
49 .alloc_size = MLXSW_SP1_KVDL_##id##_ALLOC_SIZE, \
50 .resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_##id, \
51}
52
53static const struct mlxsw_sp1_kvdl_part_info mlxsw_sp1_kvdl_parts_info[] = {
54 MLXSW_SP1_KVDL_PART_INFO(SINGLE),
55 MLXSW_SP1_KVDL_PART_INFO(CHUNKS),
56 MLXSW_SP1_KVDL_PART_INFO(LARGE_CHUNKS),
57};
58
59#define MLXSW_SP1_KVDL_PARTS_INFO_LEN ARRAY_SIZE(mlxsw_sp1_kvdl_parts_info)
60
61struct mlxsw_sp1_kvdl_part {
62 struct mlxsw_sp1_kvdl_part_info info;
63 unsigned long usage[];
64};
65
66struct mlxsw_sp1_kvdl {
67 struct mlxsw_sp1_kvdl_part *parts[MLXSW_SP1_KVDL_PARTS_INFO_LEN];
68};
69
70static struct mlxsw_sp1_kvdl_part *
71mlxsw_sp1_kvdl_alloc_size_part(struct mlxsw_sp1_kvdl *kvdl,
72 unsigned int alloc_size)
73{
74 struct mlxsw_sp1_kvdl_part *part, *min_part = NULL;
75 int i;
76
77 for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++) {
78 part = kvdl->parts[i];
79 if (alloc_size <= part->info.alloc_size &&
80 (!min_part ||
81 part->info.alloc_size <= min_part->info.alloc_size))
82 min_part = part;
83 }
84
85 return min_part ?: ERR_PTR(-ENOBUFS);
86}
87
88static struct mlxsw_sp1_kvdl_part *
89mlxsw_sp1_kvdl_index_part(struct mlxsw_sp1_kvdl *kvdl, u32 kvdl_index)
90{
91 struct mlxsw_sp1_kvdl_part *part;
92 int i;
93
94 for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++) {
95 part = kvdl->parts[i];
96 if (kvdl_index >= part->info.start_index &&
97 kvdl_index <= part->info.end_index)
98 return part;
99 }
100
101 return ERR_PTR(-EINVAL);
102}
103
104static u32
105mlxsw_sp1_kvdl_to_kvdl_index(const struct mlxsw_sp1_kvdl_part_info *info,
106 unsigned int entry_index)
107{
108 return info->start_index + entry_index * info->alloc_size;
109}
110
111static unsigned int
112mlxsw_sp1_kvdl_to_entry_index(const struct mlxsw_sp1_kvdl_part_info *info,
113 u32 kvdl_index)
114{
115 return (kvdl_index - info->start_index) / info->alloc_size;
116}
117
118static int mlxsw_sp1_kvdl_part_alloc(struct mlxsw_sp1_kvdl_part *part,
119 u32 *p_kvdl_index)
120{
121 const struct mlxsw_sp1_kvdl_part_info *info = &part->info;
122 unsigned int entry_index, nr_entries;
123
124 nr_entries = (info->end_index - info->start_index + 1) /
125 info->alloc_size;
126 entry_index = find_first_zero_bit(part->usage, nr_entries);
127 if (entry_index == nr_entries)
128 return -ENOBUFS;
129 __set_bit(entry_index, part->usage);
130
131 *p_kvdl_index = mlxsw_sp1_kvdl_to_kvdl_index(info, entry_index);
132
133 return 0;
134}
135
136static void mlxsw_sp1_kvdl_part_free(struct mlxsw_sp1_kvdl_part *part,
137 u32 kvdl_index)
138{
139 const struct mlxsw_sp1_kvdl_part_info *info = &part->info;
140 unsigned int entry_index;
141
142 entry_index = mlxsw_sp1_kvdl_to_entry_index(info, kvdl_index);
143 __clear_bit(entry_index, part->usage);
144}
145
146static int mlxsw_sp1_kvdl_alloc(struct mlxsw_sp *mlxsw_sp, void *priv,
147 enum mlxsw_sp_kvdl_entry_type type,
148 unsigned int entry_count,
149 u32 *p_entry_index)
150{
151 struct mlxsw_sp1_kvdl *kvdl = priv;
152 struct mlxsw_sp1_kvdl_part *part;
153
154
155
156
157 part = mlxsw_sp1_kvdl_alloc_size_part(kvdl, entry_count);
158 if (IS_ERR(part))
159 return PTR_ERR(part);
160
161 return mlxsw_sp1_kvdl_part_alloc(part, p_entry_index);
162}
163
164static void mlxsw_sp1_kvdl_free(struct mlxsw_sp *mlxsw_sp, void *priv,
165 enum mlxsw_sp_kvdl_entry_type type,
166 unsigned int entry_count, int entry_index)
167{
168 struct mlxsw_sp1_kvdl *kvdl = priv;
169 struct mlxsw_sp1_kvdl_part *part;
170
171 part = mlxsw_sp1_kvdl_index_part(kvdl, entry_index);
172 if (IS_ERR(part))
173 return;
174 mlxsw_sp1_kvdl_part_free(part, entry_index);
175}
176
177static int mlxsw_sp1_kvdl_alloc_size_query(struct mlxsw_sp *mlxsw_sp,
178 void *priv,
179 enum mlxsw_sp_kvdl_entry_type type,
180 unsigned int entry_count,
181 unsigned int *p_alloc_size)
182{
183 struct mlxsw_sp1_kvdl *kvdl = priv;
184 struct mlxsw_sp1_kvdl_part *part;
185
186 part = mlxsw_sp1_kvdl_alloc_size_part(kvdl, entry_count);
187 if (IS_ERR(part))
188 return PTR_ERR(part);
189
190 *p_alloc_size = part->info.alloc_size;
191
192 return 0;
193}
194
195static void mlxsw_sp1_kvdl_part_update(struct mlxsw_sp1_kvdl_part *part,
196 struct mlxsw_sp1_kvdl_part *part_prev,
197 unsigned int size)
198{
199 if (!part_prev) {
200 part->info.end_index = size - 1;
201 } else {
202 part->info.start_index = part_prev->info.end_index + 1;
203 part->info.end_index = part->info.start_index + size - 1;
204 }
205}
206
207static struct mlxsw_sp1_kvdl_part *
208mlxsw_sp1_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
209 const struct mlxsw_sp1_kvdl_part_info *info,
210 struct mlxsw_sp1_kvdl_part *part_prev)
211{
212 struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
213 struct mlxsw_sp1_kvdl_part *part;
214 bool need_update = true;
215 unsigned int nr_entries;
216 size_t usage_size;
217 u64 resource_size;
218 int err;
219
220 err = devlink_resource_size_get(devlink, info->resource_id,
221 &resource_size);
222 if (err) {
223 need_update = false;
224 resource_size = info->end_index - info->start_index + 1;
225 }
226
227 nr_entries = div_u64(resource_size, info->alloc_size);
228 usage_size = BITS_TO_LONGS(nr_entries) * sizeof(unsigned long);
229 part = kzalloc(sizeof(*part) + usage_size, GFP_KERNEL);
230 if (!part)
231 return ERR_PTR(-ENOMEM);
232
233 memcpy(&part->info, info, sizeof(part->info));
234
235 if (need_update)
236 mlxsw_sp1_kvdl_part_update(part, part_prev, resource_size);
237 return part;
238}
239
240static void mlxsw_sp1_kvdl_part_fini(struct mlxsw_sp1_kvdl_part *part)
241{
242 kfree(part);
243}
244
245static int mlxsw_sp1_kvdl_parts_init(struct mlxsw_sp *mlxsw_sp,
246 struct mlxsw_sp1_kvdl *kvdl)
247{
248 const struct mlxsw_sp1_kvdl_part_info *info;
249 struct mlxsw_sp1_kvdl_part *part_prev = NULL;
250 int err, i;
251
252 for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++) {
253 info = &mlxsw_sp1_kvdl_parts_info[i];
254 kvdl->parts[i] = mlxsw_sp1_kvdl_part_init(mlxsw_sp, info,
255 part_prev);
256 if (IS_ERR(kvdl->parts[i])) {
257 err = PTR_ERR(kvdl->parts[i]);
258 goto err_kvdl_part_init;
259 }
260 part_prev = kvdl->parts[i];
261 }
262 return 0;
263
264err_kvdl_part_init:
265 for (i--; i >= 0; i--)
266 mlxsw_sp1_kvdl_part_fini(kvdl->parts[i]);
267 return err;
268}
269
270static void mlxsw_sp1_kvdl_parts_fini(struct mlxsw_sp1_kvdl *kvdl)
271{
272 int i;
273
274 for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++)
275 mlxsw_sp1_kvdl_part_fini(kvdl->parts[i]);
276}
277
278static u64 mlxsw_sp1_kvdl_part_occ(struct mlxsw_sp1_kvdl_part *part)
279{
280 const struct mlxsw_sp1_kvdl_part_info *info = &part->info;
281 unsigned int nr_entries;
282 int bit = -1;
283 u64 occ = 0;
284
285 nr_entries = (info->end_index -
286 info->start_index + 1) /
287 info->alloc_size;
288 while ((bit = find_next_bit(part->usage, nr_entries, bit + 1))
289 < nr_entries)
290 occ += info->alloc_size;
291 return occ;
292}
293
294static u64 mlxsw_sp1_kvdl_occ_get(void *priv)
295{
296 const struct mlxsw_sp1_kvdl *kvdl = priv;
297 u64 occ = 0;
298 int i;
299
300 for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++)
301 occ += mlxsw_sp1_kvdl_part_occ(kvdl->parts[i]);
302
303 return occ;
304}
305
306static u64 mlxsw_sp1_kvdl_single_occ_get(void *priv)
307{
308 const struct mlxsw_sp1_kvdl *kvdl = priv;
309 struct mlxsw_sp1_kvdl_part *part;
310
311 part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_SINGLE];
312 return mlxsw_sp1_kvdl_part_occ(part);
313}
314
315static u64 mlxsw_sp1_kvdl_chunks_occ_get(void *priv)
316{
317 const struct mlxsw_sp1_kvdl *kvdl = priv;
318 struct mlxsw_sp1_kvdl_part *part;
319
320 part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_CHUNKS];
321 return mlxsw_sp1_kvdl_part_occ(part);
322}
323
324static u64 mlxsw_sp1_kvdl_large_chunks_occ_get(void *priv)
325{
326 const struct mlxsw_sp1_kvdl *kvdl = priv;
327 struct mlxsw_sp1_kvdl_part *part;
328
329 part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_LARGE_CHUNKS];
330 return mlxsw_sp1_kvdl_part_occ(part);
331}
332
333static int mlxsw_sp1_kvdl_init(struct mlxsw_sp *mlxsw_sp, void *priv)
334{
335 struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
336 struct mlxsw_sp1_kvdl *kvdl = priv;
337 int err;
338
339 err = mlxsw_sp1_kvdl_parts_init(mlxsw_sp, kvdl);
340 if (err)
341 return err;
342 devlink_resource_occ_get_register(devlink,
343 MLXSW_SP_RESOURCE_KVD_LINEAR,
344 mlxsw_sp1_kvdl_occ_get,
345 kvdl);
346 devlink_resource_occ_get_register(devlink,
347 MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE,
348 mlxsw_sp1_kvdl_single_occ_get,
349 kvdl);
350 devlink_resource_occ_get_register(devlink,
351 MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS,
352 mlxsw_sp1_kvdl_chunks_occ_get,
353 kvdl);
354 devlink_resource_occ_get_register(devlink,
355 MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS,
356 mlxsw_sp1_kvdl_large_chunks_occ_get,
357 kvdl);
358 return 0;
359}
360
361static void mlxsw_sp1_kvdl_fini(struct mlxsw_sp *mlxsw_sp, void *priv)
362{
363 struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
364 struct mlxsw_sp1_kvdl *kvdl = priv;
365
366 devlink_resource_occ_get_unregister(devlink,
367 MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS);
368 devlink_resource_occ_get_unregister(devlink,
369 MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS);
370 devlink_resource_occ_get_unregister(devlink,
371 MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE);
372 devlink_resource_occ_get_unregister(devlink,
373 MLXSW_SP_RESOURCE_KVD_LINEAR);
374 mlxsw_sp1_kvdl_parts_fini(kvdl);
375}
376
377const struct mlxsw_sp_kvdl_ops mlxsw_sp1_kvdl_ops = {
378 .priv_size = sizeof(struct mlxsw_sp1_kvdl),
379 .init = mlxsw_sp1_kvdl_init,
380 .fini = mlxsw_sp1_kvdl_fini,
381 .alloc = mlxsw_sp1_kvdl_alloc,
382 .free = mlxsw_sp1_kvdl_free,
383 .alloc_size_query = mlxsw_sp1_kvdl_alloc_size_query,
384};
385
386int mlxsw_sp1_kvdl_resources_register(struct mlxsw_core *mlxsw_core)
387{
388 struct devlink *devlink = priv_to_devlink(mlxsw_core);
389 static struct devlink_resource_size_params size_params;
390 u32 kvdl_max_size;
391 int err;
392
393 kvdl_max_size = MLXSW_CORE_RES_GET(mlxsw_core, KVD_SIZE) -
394 MLXSW_CORE_RES_GET(mlxsw_core, KVD_SINGLE_MIN_SIZE) -
395 MLXSW_CORE_RES_GET(mlxsw_core, KVD_DOUBLE_MIN_SIZE);
396
397 devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
398 MLXSW_SP1_KVDL_SINGLE_ALLOC_SIZE,
399 DEVLINK_RESOURCE_UNIT_ENTRY);
400 err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_SINGLES,
401 MLXSW_SP1_KVDL_SINGLE_SIZE,
402 MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE,
403 MLXSW_SP_RESOURCE_KVD_LINEAR,
404 &size_params);
405 if (err)
406 return err;
407
408 devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
409 MLXSW_SP1_KVDL_CHUNKS_ALLOC_SIZE,
410 DEVLINK_RESOURCE_UNIT_ENTRY);
411 err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_CHUNKS,
412 MLXSW_SP1_KVDL_CHUNKS_SIZE,
413 MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS,
414 MLXSW_SP_RESOURCE_KVD_LINEAR,
415 &size_params);
416 if (err)
417 return err;
418
419 devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
420 MLXSW_SP1_KVDL_LARGE_CHUNKS_ALLOC_SIZE,
421 DEVLINK_RESOURCE_UNIT_ENTRY);
422 err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_LARGE_CHUNKS,
423 MLXSW_SP1_KVDL_LARGE_CHUNKS_SIZE,
424 MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS,
425 MLXSW_SP_RESOURCE_KVD_LINEAR,
426 &size_params);
427 return err;
428}
429
