1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 // Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
3
4 #include <linux/math64.h>
5 #include "lib/aso.h"
6 #include "en/tc/post_act.h"
7 #include "meter.h"
8 #include "en/tc_priv.h"
9
10 #define MLX5_START_COLOR_SHIFT 28
11 #define MLX5_METER_MODE_SHIFT 24
12 #define MLX5_CBS_EXP_SHIFT 24
13 #define MLX5_CBS_MAN_SHIFT 16
14 #define MLX5_CIR_EXP_SHIFT 8
15
16 /* cir = 8*(10^9)*cir_mantissa/(2^cir_exponent)) bits/s */
17 #define MLX5_CONST_CIR 8000000000ULL
18 #define MLX5_CALC_CIR(m, e) ((MLX5_CONST_CIR * (m)) >> (e))
19 #define MLX5_MAX_CIR ((MLX5_CONST_CIR * 0x100) - 1)
20
21 /* cbs = cbs_mantissa*2^cbs_exponent */
22 #define MLX5_CALC_CBS(m, e) ((m) << (e))
23 #define MLX5_MAX_CBS ((0x100ULL << 0x1F) - 1)
24 #define MLX5_MAX_HW_CBS 0x7FFFFFFF
25
26 struct mlx5e_flow_meter_aso_obj {
27 struct list_head entry;
28 int base_id;
29 int total_meters;
30
31 unsigned long meters_map[0]; /* must be at the end of this struct */
32 };
33
34 struct mlx5e_flow_meters {
35 enum mlx5_flow_namespace_type ns_type;
36 struct mlx5_aso *aso;
37 struct mutex aso_lock; /* Protects aso operations */
38 int log_granularity;
39 u32 pdn;
40
41 DECLARE_HASHTABLE(hashtbl, 8);
42
43 struct mutex sync_lock; /* protect flow meter operations */
44 struct list_head partial_list;
45 struct list_head full_list;
46
47 struct mlx5_core_dev *mdev;
48 struct mlx5e_post_act *post_act;
49 };
50
51 static void
mlx5e_flow_meter_cir_calc(u64 cir,u8 * man,u8 * exp)52 mlx5e_flow_meter_cir_calc(u64 cir, u8 *man, u8 *exp)
53 {
54 s64 _cir, _delta, delta = S64_MAX;
55 u8 e, _man = 0, _exp = 0;
56 u64 m;
57
58 for (e = 0; e <= 0x1F; e++) { /* exp width 5bit */
59 m = cir << e;
60 if ((s64)m < 0) /* overflow */
61 break;
62 m = div64_u64(m, MLX5_CONST_CIR);
63 if (m > 0xFF) /* man width 8 bit */
64 continue;
65 _cir = MLX5_CALC_CIR(m, e);
66 _delta = cir - _cir;
67 if (_delta < delta) {
68 _man = m;
69 _exp = e;
70 if (!_delta)
71 goto found;
72 delta = _delta;
73 }
74 }
75
76 found:
77 *man = _man;
78 *exp = _exp;
79 }
80
81 static void
mlx5e_flow_meter_cbs_calc(u64 cbs,u8 * man,u8 * exp)82 mlx5e_flow_meter_cbs_calc(u64 cbs, u8 *man, u8 *exp)
83 {
84 s64 _cbs, _delta, delta = S64_MAX;
85 u8 e, _man = 0, _exp = 0;
86 u64 m;
87
88 for (e = 0; e <= 0x1F; e++) { /* exp width 5bit */
89 m = cbs >> e;
90 if (m > 0xFF) /* man width 8 bit */
91 continue;
92 _cbs = MLX5_CALC_CBS(m, e);
93 _delta = cbs - _cbs;
94 if (_delta < delta) {
95 _man = m;
96 _exp = e;
97 if (!_delta)
98 goto found;
99 delta = _delta;
100 }
101 }
102
103 found:
104 *man = _man;
105 *exp = _exp;
106 }
107
108 int
mlx5e_tc_meter_modify(struct mlx5_core_dev * mdev,struct mlx5e_flow_meter_handle * meter,struct mlx5e_flow_meter_params * meter_params)109 mlx5e_tc_meter_modify(struct mlx5_core_dev *mdev,
110 struct mlx5e_flow_meter_handle *meter,
111 struct mlx5e_flow_meter_params *meter_params)
112 {
113 struct mlx5_wqe_aso_ctrl_seg *aso_ctrl;
114 struct mlx5_wqe_aso_data_seg *aso_data;
115 struct mlx5e_flow_meters *flow_meters;
116 u8 cir_man, cir_exp, cbs_man, cbs_exp;
117 struct mlx5_aso_wqe *aso_wqe;
118 unsigned long expires;
119 struct mlx5_aso *aso;
120 u64 rate, burst;
121 u8 ds_cnt;
122 int err;
123
124 rate = meter_params->rate;
125 burst = meter_params->burst;
126
127 /* HW treats each packet as 128 bytes in PPS mode */
128 if (meter_params->mode == MLX5_RATE_LIMIT_PPS) {
129 rate <<= 10;
130 burst <<= 7;
131 }
132
133 if (!rate || rate > MLX5_MAX_CIR || !burst || burst > MLX5_MAX_CBS)
134 return -EINVAL;
135
136 /* HW has limitation of total 31 bits for cbs */
137 if (burst > MLX5_MAX_HW_CBS) {
138 mlx5_core_warn(mdev,
139 "burst(%lld) is too large, use HW allowed value(%d)\n",
140 burst, MLX5_MAX_HW_CBS);
141 burst = MLX5_MAX_HW_CBS;
142 }
143
144 mlx5_core_dbg(mdev, "meter mode=%d\n", meter_params->mode);
145 mlx5e_flow_meter_cir_calc(rate, &cir_man, &cir_exp);
146 mlx5_core_dbg(mdev, "rate=%lld, cir=%lld, exp=%d, man=%d\n",
147 rate, MLX5_CALC_CIR(cir_man, cir_exp), cir_exp, cir_man);
148 mlx5e_flow_meter_cbs_calc(burst, &cbs_man, &cbs_exp);
149 mlx5_core_dbg(mdev, "burst=%lld, cbs=%lld, exp=%d, man=%d\n",
150 burst, MLX5_CALC_CBS((u64)cbs_man, cbs_exp), cbs_exp, cbs_man);
151
152 if (!cir_man || !cbs_man)
153 return -EINVAL;
154
155 flow_meters = meter->flow_meters;
156 aso = flow_meters->aso;
157
158 mutex_lock(&flow_meters->aso_lock);
159 aso_wqe = mlx5_aso_get_wqe(aso);
160 ds_cnt = DIV_ROUND_UP(sizeof(struct mlx5_aso_wqe_data), MLX5_SEND_WQE_DS);
161 mlx5_aso_build_wqe(aso, ds_cnt, aso_wqe, meter->obj_id,
162 MLX5_ACCESS_ASO_OPC_MOD_FLOW_METER);
163
164 aso_ctrl = &aso_wqe->aso_ctrl;
165 memset(aso_ctrl, 0, sizeof(*aso_ctrl));
166 aso_ctrl->data_mask_mode = MLX5_ASO_DATA_MASK_MODE_BYTEWISE_64BYTE << 6;
167 aso_ctrl->condition_1_0_operand = MLX5_ASO_ALWAYS_TRUE |
168 MLX5_ASO_ALWAYS_TRUE << 4;
169 aso_ctrl->data_offset_condition_operand = MLX5_ASO_LOGICAL_OR << 6;
170 aso_ctrl->data_mask = cpu_to_be64(0x80FFFFFFULL << (meter->idx ? 0 : 32));
171
172 aso_data = (struct mlx5_wqe_aso_data_seg *)(aso_wqe + 1);
173 memset(aso_data, 0, sizeof(*aso_data));
174 aso_data->bytewise_data[meter->idx * 8] = cpu_to_be32((0x1 << 31) | /* valid */
175 (MLX5_FLOW_METER_COLOR_GREEN << MLX5_START_COLOR_SHIFT));
176 if (meter_params->mode == MLX5_RATE_LIMIT_PPS)
177 aso_data->bytewise_data[meter->idx * 8] |=
178 cpu_to_be32(MLX5_FLOW_METER_MODE_NUM_PACKETS << MLX5_METER_MODE_SHIFT);
179 else
180 aso_data->bytewise_data[meter->idx * 8] |=
181 cpu_to_be32(MLX5_FLOW_METER_MODE_BYTES_IP_LENGTH << MLX5_METER_MODE_SHIFT);
182
183 aso_data->bytewise_data[meter->idx * 8 + 2] = cpu_to_be32((cbs_exp << MLX5_CBS_EXP_SHIFT) |
184 (cbs_man << MLX5_CBS_MAN_SHIFT) |
185 (cir_exp << MLX5_CIR_EXP_SHIFT) |
186 cir_man);
187
188 mlx5_aso_post_wqe(aso, true, &aso_wqe->ctrl);
189
190 /* With newer FW, the wait for the first ASO WQE is more than 2us, put the wait 10ms. */
191 expires = jiffies + msecs_to_jiffies(10);
192 do {
193 err = mlx5_aso_poll_cq(aso, true);
194 if (err)
195 usleep_range(2, 10);
196 } while (err && time_is_after_jiffies(expires));
197 mutex_unlock(&flow_meters->aso_lock);
198
199 return err;
200 }
201
202 static int
mlx5e_flow_meter_create_aso_obj(struct mlx5e_flow_meters * flow_meters,int * obj_id)203 mlx5e_flow_meter_create_aso_obj(struct mlx5e_flow_meters *flow_meters, int *obj_id)
204 {
205 u32 in[MLX5_ST_SZ_DW(create_flow_meter_aso_obj_in)] = {};
206 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
207 struct mlx5_core_dev *mdev = flow_meters->mdev;
208 void *obj;
209 int err;
210
211 MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_CREATE_GENERAL_OBJECT);
212 MLX5_SET(general_obj_in_cmd_hdr, in, obj_type,
213 MLX5_GENERAL_OBJECT_TYPES_FLOW_METER_ASO);
214 MLX5_SET(general_obj_in_cmd_hdr, in, log_obj_range, flow_meters->log_granularity);
215
216 obj = MLX5_ADDR_OF(create_flow_meter_aso_obj_in, in, flow_meter_aso_obj);
217 MLX5_SET(flow_meter_aso_obj, obj, meter_aso_access_pd, flow_meters->pdn);
218
219 err = mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out));
220 if (!err) {
221 *obj_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id);
222 mlx5_core_dbg(mdev, "flow meter aso obj(0x%x) created\n", *obj_id);
223 }
224
225 return err;
226 }
227
228 static void
mlx5e_flow_meter_destroy_aso_obj(struct mlx5_core_dev * mdev,u32 obj_id)229 mlx5e_flow_meter_destroy_aso_obj(struct mlx5_core_dev *mdev, u32 obj_id)
230 {
231 u32 in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {};
232 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)];
233
234 MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT);
235 MLX5_SET(general_obj_in_cmd_hdr, in, obj_type,
236 MLX5_GENERAL_OBJECT_TYPES_FLOW_METER_ASO);
237 MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, obj_id);
238
239 mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out));
240 mlx5_core_dbg(mdev, "flow meter aso obj(0x%x) destroyed\n", obj_id);
241 }
242
243 static struct mlx5e_flow_meter_handle *
__mlx5e_flow_meter_alloc(struct mlx5e_flow_meters * flow_meters)244 __mlx5e_flow_meter_alloc(struct mlx5e_flow_meters *flow_meters)
245 {
246 struct mlx5_core_dev *mdev = flow_meters->mdev;
247 struct mlx5e_flow_meter_aso_obj *meters_obj;
248 struct mlx5e_flow_meter_handle *meter;
249 struct mlx5_fc *counter;
250 int err, pos, total;
251 u32 id;
252
253 meter = kzalloc(sizeof(*meter), GFP_KERNEL);
254 if (!meter)
255 return ERR_PTR(-ENOMEM);
256
257 counter = mlx5_fc_create(mdev, true);
258 if (IS_ERR(counter)) {
259 err = PTR_ERR(counter);
260 goto err_red_counter;
261 }
262 meter->red_counter = counter;
263
264 counter = mlx5_fc_create(mdev, true);
265 if (IS_ERR(counter)) {
266 err = PTR_ERR(counter);
267 goto err_green_counter;
268 }
269 meter->green_counter = counter;
270
271 meters_obj = list_first_entry_or_null(&flow_meters->partial_list,
272 struct mlx5e_flow_meter_aso_obj,
273 entry);
274 /* 2 meters in one object */
275 total = 1 << (flow_meters->log_granularity + 1);
276 if (!meters_obj) {
277 err = mlx5e_flow_meter_create_aso_obj(flow_meters, &id);
278 if (err) {
279 mlx5_core_err(mdev, "Failed to create flow meter ASO object\n");
280 goto err_create;
281 }
282
283 meters_obj = kzalloc(sizeof(*meters_obj) + BITS_TO_BYTES(total),
284 GFP_KERNEL);
285 if (!meters_obj) {
286 err = -ENOMEM;
287 goto err_mem;
288 }
289
290 meters_obj->base_id = id;
291 meters_obj->total_meters = total;
292 list_add(&meters_obj->entry, &flow_meters->partial_list);
293 pos = 0;
294 } else {
295 pos = find_first_zero_bit(meters_obj->meters_map, total);
296 if (bitmap_weight(meters_obj->meters_map, total) == total - 1) {
297 list_del(&meters_obj->entry);
298 list_add(&meters_obj->entry, &flow_meters->full_list);
299 }
300 }
301
302 bitmap_set(meters_obj->meters_map, pos, 1);
303 meter->flow_meters = flow_meters;
304 meter->meters_obj = meters_obj;
305 meter->obj_id = meters_obj->base_id + pos / 2;
306 meter->idx = pos % 2;
307
308 mlx5_core_dbg(mdev, "flow meter allocated, obj_id=0x%x, index=%d\n",
309 meter->obj_id, meter->idx);
310
311 return meter;
312
313 err_mem:
314 mlx5e_flow_meter_destroy_aso_obj(mdev, id);
315 err_create:
316 mlx5_fc_destroy(mdev, meter->green_counter);
317 err_green_counter:
318 mlx5_fc_destroy(mdev, meter->red_counter);
319 err_red_counter:
320 kfree(meter);
321 return ERR_PTR(err);
322 }
323
324 static void
__mlx5e_flow_meter_free(struct mlx5e_flow_meter_handle * meter)325 __mlx5e_flow_meter_free(struct mlx5e_flow_meter_handle *meter)
326 {
327 struct mlx5e_flow_meters *flow_meters = meter->flow_meters;
328 struct mlx5_core_dev *mdev = flow_meters->mdev;
329 struct mlx5e_flow_meter_aso_obj *meters_obj;
330 int n, pos;
331
332 mlx5_fc_destroy(mdev, meter->green_counter);
333 mlx5_fc_destroy(mdev, meter->red_counter);
334
335 meters_obj = meter->meters_obj;
336 pos = (meter->obj_id - meters_obj->base_id) * 2 + meter->idx;
337 bitmap_clear(meters_obj->meters_map, pos, 1);
338 n = bitmap_weight(meters_obj->meters_map, meters_obj->total_meters);
339 if (n == 0) {
340 list_del(&meters_obj->entry);
341 mlx5e_flow_meter_destroy_aso_obj(mdev, meters_obj->base_id);
342 kfree(meters_obj);
343 } else if (n == meters_obj->total_meters - 1) {
344 list_del(&meters_obj->entry);
345 list_add(&meters_obj->entry, &flow_meters->partial_list);
346 }
347
348 mlx5_core_dbg(mdev, "flow meter freed, obj_id=0x%x, index=%d\n",
349 meter->obj_id, meter->idx);
350 kfree(meter);
351 }
352
353 static struct mlx5e_flow_meter_handle *
__mlx5e_tc_meter_get(struct mlx5e_flow_meters * flow_meters,u32 index)354 __mlx5e_tc_meter_get(struct mlx5e_flow_meters *flow_meters, u32 index)
355 {
356 struct mlx5e_flow_meter_handle *meter;
357
358 hash_for_each_possible(flow_meters->hashtbl, meter, hlist, index)
359 if (meter->params.index == index)
360 goto add_ref;
361
362 return ERR_PTR(-ENOENT);
363
364 add_ref:
365 meter->refcnt++;
366
367 return meter;
368 }
369
370 struct mlx5e_flow_meter_handle *
mlx5e_tc_meter_get(struct mlx5_core_dev * mdev,struct mlx5e_flow_meter_params * params)371 mlx5e_tc_meter_get(struct mlx5_core_dev *mdev, struct mlx5e_flow_meter_params *params)
372 {
373 struct mlx5e_flow_meters *flow_meters;
374 struct mlx5e_flow_meter_handle *meter;
375
376 flow_meters = mlx5e_get_flow_meters(mdev);
377 if (!flow_meters)
378 return ERR_PTR(-EOPNOTSUPP);
379
380 mutex_lock(&flow_meters->sync_lock);
381 meter = __mlx5e_tc_meter_get(flow_meters, params->index);
382 mutex_unlock(&flow_meters->sync_lock);
383
384 return meter;
385 }
386
387 static void
__mlx5e_tc_meter_put(struct mlx5e_flow_meter_handle * meter)388 __mlx5e_tc_meter_put(struct mlx5e_flow_meter_handle *meter)
389 {
390 if (--meter->refcnt == 0) {
391 hash_del(&meter->hlist);
392 __mlx5e_flow_meter_free(meter);
393 }
394 }
395
396 void
mlx5e_tc_meter_put(struct mlx5e_flow_meter_handle * meter)397 mlx5e_tc_meter_put(struct mlx5e_flow_meter_handle *meter)
398 {
399 struct mlx5e_flow_meters *flow_meters = meter->flow_meters;
400
401 mutex_lock(&flow_meters->sync_lock);
402 __mlx5e_tc_meter_put(meter);
403 mutex_unlock(&flow_meters->sync_lock);
404 }
405
406 static struct mlx5e_flow_meter_handle *
mlx5e_tc_meter_alloc(struct mlx5e_flow_meters * flow_meters,struct mlx5e_flow_meter_params * params)407 mlx5e_tc_meter_alloc(struct mlx5e_flow_meters *flow_meters,
408 struct mlx5e_flow_meter_params *params)
409 {
410 struct mlx5e_flow_meter_handle *meter;
411
412 meter = __mlx5e_flow_meter_alloc(flow_meters);
413 if (IS_ERR(meter))
414 return meter;
415
416 hash_add(flow_meters->hashtbl, &meter->hlist, params->index);
417 meter->params.index = params->index;
418 meter->refcnt++;
419
420 return meter;
421 }
422
423 static int
__mlx5e_tc_meter_update(struct mlx5e_flow_meter_handle * meter,struct mlx5e_flow_meter_params * params)424 __mlx5e_tc_meter_update(struct mlx5e_flow_meter_handle *meter,
425 struct mlx5e_flow_meter_params *params)
426 {
427 struct mlx5_core_dev *mdev = meter->flow_meters->mdev;
428 int err = 0;
429
430 if (meter->params.mode != params->mode || meter->params.rate != params->rate ||
431 meter->params.burst != params->burst) {
432 err = mlx5e_tc_meter_modify(mdev, meter, params);
433 if (err)
434 goto out;
435
436 meter->params.mode = params->mode;
437 meter->params.rate = params->rate;
438 meter->params.burst = params->burst;
439 }
440
441 out:
442 return err;
443 }
444
445 int
mlx5e_tc_meter_update(struct mlx5e_flow_meter_handle * meter,struct mlx5e_flow_meter_params * params)446 mlx5e_tc_meter_update(struct mlx5e_flow_meter_handle *meter,
447 struct mlx5e_flow_meter_params *params)
448 {
449 struct mlx5_core_dev *mdev = meter->flow_meters->mdev;
450 struct mlx5e_flow_meters *flow_meters;
451 int err;
452
453 flow_meters = mlx5e_get_flow_meters(mdev);
454 if (!flow_meters)
455 return -EOPNOTSUPP;
456
457 mutex_lock(&flow_meters->sync_lock);
458 err = __mlx5e_tc_meter_update(meter, params);
459 mutex_unlock(&flow_meters->sync_lock);
460 return err;
461 }
462
463 struct mlx5e_flow_meter_handle *
mlx5e_tc_meter_replace(struct mlx5_core_dev * mdev,struct mlx5e_flow_meter_params * params)464 mlx5e_tc_meter_replace(struct mlx5_core_dev *mdev, struct mlx5e_flow_meter_params *params)
465 {
466 struct mlx5e_flow_meters *flow_meters;
467 struct mlx5e_flow_meter_handle *meter;
468 int err;
469
470 flow_meters = mlx5e_get_flow_meters(mdev);
471 if (!flow_meters)
472 return ERR_PTR(-EOPNOTSUPP);
473
474 mutex_lock(&flow_meters->sync_lock);
475 meter = __mlx5e_tc_meter_get(flow_meters, params->index);
476 if (IS_ERR(meter)) {
477 meter = mlx5e_tc_meter_alloc(flow_meters, params);
478 if (IS_ERR(meter)) {
479 err = PTR_ERR(meter);
480 goto err_get;
481 }
482 }
483
484 err = __mlx5e_tc_meter_update(meter, params);
485 if (err)
486 goto err_update;
487
488 mutex_unlock(&flow_meters->sync_lock);
489 return meter;
490
491 err_update:
492 __mlx5e_tc_meter_put(meter);
493 err_get:
494 mutex_unlock(&flow_meters->sync_lock);
495 return ERR_PTR(err);
496 }
497
498 enum mlx5_flow_namespace_type
mlx5e_tc_meter_get_namespace(struct mlx5e_flow_meters * flow_meters)499 mlx5e_tc_meter_get_namespace(struct mlx5e_flow_meters *flow_meters)
500 {
501 return flow_meters->ns_type;
502 }
503
504 struct mlx5e_flow_meters *
mlx5e_flow_meters_init(struct mlx5e_priv * priv,enum mlx5_flow_namespace_type ns_type,struct mlx5e_post_act * post_act)505 mlx5e_flow_meters_init(struct mlx5e_priv *priv,
506 enum mlx5_flow_namespace_type ns_type,
507 struct mlx5e_post_act *post_act)
508 {
509 struct mlx5_core_dev *mdev = priv->mdev;
510 struct mlx5e_flow_meters *flow_meters;
511 int err;
512
513 if (!(MLX5_CAP_GEN_64(mdev, general_obj_types) &
514 MLX5_HCA_CAP_GENERAL_OBJECT_TYPES_FLOW_METER_ASO))
515 return ERR_PTR(-EOPNOTSUPP);
516
517 if (IS_ERR_OR_NULL(post_act)) {
518 netdev_dbg(priv->netdev,
519 "flow meter offload is not supported, post action is missing\n");
520 return ERR_PTR(-EOPNOTSUPP);
521 }
522
523 flow_meters = kzalloc(sizeof(*flow_meters), GFP_KERNEL);
524 if (!flow_meters)
525 return ERR_PTR(-ENOMEM);
526
527 err = mlx5_core_alloc_pd(mdev, &flow_meters->pdn);
528 if (err) {
529 mlx5_core_err(mdev, "Failed to alloc pd for flow meter aso, err=%d\n", err);
530 goto err_out;
531 }
532
533 flow_meters->aso = mlx5_aso_create(mdev, flow_meters->pdn);
534 if (IS_ERR(flow_meters->aso)) {
535 mlx5_core_warn(mdev, "Failed to create aso wqe for flow meter\n");
536 err = PTR_ERR(flow_meters->aso);
537 goto err_sq;
538 }
539
540 mutex_init(&flow_meters->sync_lock);
541 INIT_LIST_HEAD(&flow_meters->partial_list);
542 INIT_LIST_HEAD(&flow_meters->full_list);
543
544 flow_meters->ns_type = ns_type;
545 flow_meters->mdev = mdev;
546 flow_meters->post_act = post_act;
547 mutex_init(&flow_meters->aso_lock);
548 flow_meters->log_granularity = min_t(int, 6,
549 MLX5_CAP_QOS(mdev, log_meter_aso_max_alloc));
550
551 return flow_meters;
552
553 err_sq:
554 mlx5_core_dealloc_pd(mdev, flow_meters->pdn);
555 err_out:
556 kfree(flow_meters);
557 return ERR_PTR(err);
558 }
559
560 void
mlx5e_flow_meters_cleanup(struct mlx5e_flow_meters * flow_meters)561 mlx5e_flow_meters_cleanup(struct mlx5e_flow_meters *flow_meters)
562 {
563 if (IS_ERR_OR_NULL(flow_meters))
564 return;
565
566 mlx5_aso_destroy(flow_meters->aso);
567 mlx5_core_dealloc_pd(flow_meters->mdev, flow_meters->pdn);
568 kfree(flow_meters);
569 }
570
571 void
mlx5e_tc_meter_get_stats(struct mlx5e_flow_meter_handle * meter,u64 * bytes,u64 * packets,u64 * drops,u64 * lastuse)572 mlx5e_tc_meter_get_stats(struct mlx5e_flow_meter_handle *meter,
573 u64 *bytes, u64 *packets, u64 *drops, u64 *lastuse)
574 {
575 u64 bytes1, packets1, lastuse1;
576 u64 bytes2, packets2, lastuse2;
577
578 mlx5_fc_query_cached(meter->green_counter, &bytes1, &packets1, &lastuse1);
579 mlx5_fc_query_cached(meter->red_counter, &bytes2, &packets2, &lastuse2);
580
581 *bytes = bytes1 + bytes2;
582 *packets = packets1 + packets2;
583 *drops = packets2;
584 *lastuse = max_t(u64, lastuse1, lastuse2);
585 }
586