1// SPDX-License-Identifier: GPL-2.0 2/* Marvell RVU Ethernet driver 3 * 4 * Copyright (C) 2021 Marvell. 5 * 6 */ 7 8#include "cn10k.h" 9#include "otx2_reg.h" 10#include "otx2_struct.h" 11 12static struct dev_hw_ops otx2_hw_ops = { 13 .sq_aq_init = otx2_sq_aq_init, 14 .sqe_flush = otx2_sqe_flush, 15 .aura_freeptr = otx2_aura_freeptr, 16 .refill_pool_ptrs = otx2_refill_pool_ptrs, 17}; 18 19static struct dev_hw_ops cn10k_hw_ops = { 20 .sq_aq_init = cn10k_sq_aq_init, 21 .sqe_flush = cn10k_sqe_flush, 22 .aura_freeptr = cn10k_aura_freeptr, 23 .refill_pool_ptrs = cn10k_refill_pool_ptrs, 24}; 25 26int cn10k_lmtst_init(struct otx2_nic *pfvf) 27{ 28 29 struct lmtst_tbl_setup_req *req; 30 struct otx2_lmt_info *lmt_info; 31 int err, cpu; 32 33 if (!test_bit(CN10K_LMTST, &pfvf->hw.cap_flag)) { 34 pfvf->hw_ops = &otx2_hw_ops; 35 return 0; 36 } 37 38 pfvf->hw_ops = &cn10k_hw_ops; 39 /* Total LMTLINES = num_online_cpus() * 32 (For Burst flush).*/ 40 pfvf->tot_lmt_lines = (num_online_cpus() * LMT_BURST_SIZE); 41 pfvf->hw.lmt_info = alloc_percpu(struct otx2_lmt_info); 42 43 mutex_lock(&pfvf->mbox.lock); 44 req = otx2_mbox_alloc_msg_lmtst_tbl_setup(&pfvf->mbox); 45 if (!req) { 46 mutex_unlock(&pfvf->mbox.lock); 47 return -ENOMEM; 48 } 49 50 req->use_local_lmt_region = true; 51 52 err = qmem_alloc(pfvf->dev, &pfvf->dync_lmt, pfvf->tot_lmt_lines, 53 LMT_LINE_SIZE); 54 if (err) { 55 mutex_unlock(&pfvf->mbox.lock); 56 return err; 57 } 58 pfvf->hw.lmt_base = (u64 *)pfvf->dync_lmt->base; 59 req->lmt_iova = (u64)pfvf->dync_lmt->iova; 60 61 err = otx2_sync_mbox_msg(&pfvf->mbox); 62 mutex_unlock(&pfvf->mbox.lock); 63 64 for_each_possible_cpu(cpu) { 65 lmt_info = per_cpu_ptr(pfvf->hw.lmt_info, cpu); 66 lmt_info->lmt_addr = ((u64)pfvf->hw.lmt_base + 67 (cpu * LMT_BURST_SIZE * LMT_LINE_SIZE)); 68 lmt_info->lmt_id = cpu * LMT_BURST_SIZE; 69 } 70 71 return 0; 72} 73EXPORT_SYMBOL(cn10k_lmtst_init); 74 75int cn10k_sq_aq_init(void *dev, u16 qidx, u16 sqb_aura) 76{ 77 struct nix_cn10k_aq_enq_req *aq; 78 struct otx2_nic *pfvf = dev; 79 80 /* Get memory to put this msg */ 81 aq = otx2_mbox_alloc_msg_nix_cn10k_aq_enq(&pfvf->mbox); 82 if (!aq) 83 return -ENOMEM; 84 85 aq->sq.cq = pfvf->hw.rx_queues + qidx; 86 aq->sq.max_sqe_size = NIX_MAXSQESZ_W16; /* 128 byte */ 87 aq->sq.cq_ena = 1; 88 aq->sq.ena = 1; 89 aq->sq.smq = otx2_get_smq_idx(pfvf, qidx); 90 aq->sq.smq_rr_weight = mtu_to_dwrr_weight(pfvf, pfvf->tx_max_pktlen); 91 aq->sq.default_chan = pfvf->hw.tx_chan_base; 92 aq->sq.sqe_stype = NIX_STYPE_STF; /* Cache SQB */ 93 aq->sq.sqb_aura = sqb_aura; 94 aq->sq.sq_int_ena = NIX_SQINT_BITS; 95 aq->sq.qint_idx = 0; 96 /* Due pipelining impact minimum 2000 unused SQ CQE's 97 * need to maintain to avoid CQ overflow. 98 */ 99 aq->sq.cq_limit = ((SEND_CQ_SKID * 256) / (pfvf->qset.sqe_cnt)); 100 101 /* Fill AQ info */ 102 aq->qidx = qidx; 103 aq->ctype = NIX_AQ_CTYPE_SQ; 104 aq->op = NIX_AQ_INSTOP_INIT; 105 106 return otx2_sync_mbox_msg(&pfvf->mbox); 107} 108 109#define NPA_MAX_BURST 16 110int cn10k_refill_pool_ptrs(void *dev, struct otx2_cq_queue *cq) 111{ 112 struct otx2_nic *pfvf = dev; 113 int cnt = cq->pool_ptrs; 114 u64 ptrs[NPA_MAX_BURST]; 115 dma_addr_t bufptr; 116 int num_ptrs = 1; 117 118 /* Refill pool with new buffers */ 119 while (cq->pool_ptrs) { 120 if (otx2_alloc_buffer(pfvf, cq, &bufptr)) { 121 if (num_ptrs--) 122 __cn10k_aura_freeptr(pfvf, cq->cq_idx, ptrs, 123 num_ptrs); 124 break; 125 } 126 cq->pool_ptrs--; 127 ptrs[num_ptrs] = (u64)bufptr + OTX2_HEAD_ROOM; 128 num_ptrs++; 129 if (num_ptrs == NPA_MAX_BURST || cq->pool_ptrs == 0) { 130 __cn10k_aura_freeptr(pfvf, cq->cq_idx, ptrs, 131 num_ptrs); 132 num_ptrs = 1; 133 } 134 } 135 return cnt - cq->pool_ptrs; 136} 137 138void cn10k_sqe_flush(void *dev, struct otx2_snd_queue *sq, int size, int qidx) 139{ 140 struct otx2_lmt_info *lmt_info; 141 struct otx2_nic *pfvf = dev; 142 u64 val = 0, tar_addr = 0; 143 144 lmt_info = per_cpu_ptr(pfvf->hw.lmt_info, smp_processor_id()); 145 /* FIXME: val[0:10] LMT_ID. 146 * [12:15] no of LMTST - 1 in the burst. 147 * [19:63] data size of each LMTST in the burst except first. 148 */ 149 val = (lmt_info->lmt_id & 0x7FF); 150 /* Target address for LMTST flush tells HW how many 128bit 151 * words are present. 152 * tar_addr[6:4] size of first LMTST - 1 in units of 128b. 153 */ 154 tar_addr |= sq->io_addr | (((size / 16) - 1) & 0x7) << 4; 155 dma_wmb(); 156 memcpy((u64 *)lmt_info->lmt_addr, sq->sqe_base, size); 157 cn10k_lmt_flush(val, tar_addr); 158 159 sq->head++; 160 sq->head &= (sq->sqe_cnt - 1); 161} 162 163int cn10k_free_all_ipolicers(struct otx2_nic *pfvf) 164{ 165 struct nix_bandprof_free_req *req; 166 int rc; 167 168 if (is_dev_otx2(pfvf->pdev)) 169 return 0; 170 171 mutex_lock(&pfvf->mbox.lock); 172 173 req = otx2_mbox_alloc_msg_nix_bandprof_free(&pfvf->mbox); 174 if (!req) { 175 rc = -ENOMEM; 176 goto out; 177 } 178 179 /* Free all bandwidth profiles allocated */ 180 req->free_all = true; 181 182 rc = otx2_sync_mbox_msg(&pfvf->mbox); 183out: 184 mutex_unlock(&pfvf->mbox.lock); 185 return rc; 186} 187 188int cn10k_alloc_leaf_profile(struct otx2_nic *pfvf, u16 *leaf) 189{ 190 struct nix_bandprof_alloc_req *req; 191 struct nix_bandprof_alloc_rsp *rsp; 192 int rc; 193 194 req = otx2_mbox_alloc_msg_nix_bandprof_alloc(&pfvf->mbox); 195 if (!req) 196 return -ENOMEM; 197 198 req->prof_count[BAND_PROF_LEAF_LAYER] = 1; 199 200 rc = otx2_sync_mbox_msg(&pfvf->mbox); 201 if (rc) 202 goto out; 203 204 rsp = (struct nix_bandprof_alloc_rsp *) 205 otx2_mbox_get_rsp(&pfvf->mbox.mbox, 0, &req->hdr); 206 if (!rsp->prof_count[BAND_PROF_LEAF_LAYER]) { 207 rc = -EIO; 208 goto out; 209 } 210 211 *leaf = rsp->prof_idx[BAND_PROF_LEAF_LAYER][0]; 212out: 213 if (rc) { 214 dev_warn(pfvf->dev, 215 "Failed to allocate ingress bandwidth policer\n"); 216 } 217 218 return rc; 219} 220 221int cn10k_alloc_matchall_ipolicer(struct otx2_nic *pfvf) 222{ 223 struct otx2_hw *hw = &pfvf->hw; 224 int ret; 225 226 mutex_lock(&pfvf->mbox.lock); 227 228 ret = cn10k_alloc_leaf_profile(pfvf, &hw->matchall_ipolicer); 229 230 mutex_unlock(&pfvf->mbox.lock); 231 232 return ret; 233} 234 235#define POLICER_TIMESTAMP 1 /* 1 second */ 236#define MAX_RATE_EXP 22 /* Valid rate exponent range: 0 - 22 */ 237 238static void cn10k_get_ingress_burst_cfg(u32 burst, u32 *burst_exp, 239 u32 *burst_mantissa) 240{ 241 int tmp; 242 243 /* Burst is calculated as 244 * (1+[BURST_MANTISSA]/256)*2^[BURST_EXPONENT] 245 * This is the upper limit on number tokens (bytes) that 246 * can be accumulated in the bucket. 247 */ 248 *burst_exp = ilog2(burst); 249 if (burst < 256) { 250 /* No float: can't express mantissa in this case */ 251 *burst_mantissa = 0; 252 return; 253 } 254 255 if (*burst_exp > MAX_RATE_EXP) 256 *burst_exp = MAX_RATE_EXP; 257 258 /* Calculate mantissa 259 * Find remaining bytes 'burst - 2^burst_exp' 260 * mantissa = (remaining bytes) / 2^ (burst_exp - 8) 261 */ 262 tmp = burst - rounddown_pow_of_two(burst); 263 *burst_mantissa = tmp / (1UL << (*burst_exp - 8)); 264} 265 266static void cn10k_get_ingress_rate_cfg(u64 rate, u32 *rate_exp, 267 u32 *rate_mantissa, u32 *rdiv) 268{ 269 u32 div = 0; 270 u32 exp = 0; 271 u64 tmp; 272 273 /* Figure out mantissa, exponent and divider from given max pkt rate 274 * 275 * To achieve desired rate HW adds 276 * (1+[RATE_MANTISSA]/256)*2^[RATE_EXPONENT] tokens (bytes) at every 277 * policer timeunit * 2^rdiv ie 2 * 2^rdiv usecs, to the token bucket. 278 * Here policer timeunit is 2 usecs and rate is in bits per sec. 279 * Since floating point cannot be used below algorithm uses 1000000 280 * scale factor to support rates upto 100Gbps. 281 */ 282 tmp = rate * 32 * 2; 283 if (tmp < 256000000) { 284 while (tmp < 256000000) { 285 tmp = tmp * 2; 286 div++; 287 } 288 } else { 289 for (exp = 0; tmp >= 512000000 && exp <= MAX_RATE_EXP; exp++) 290 tmp = tmp / 2; 291 292 if (exp > MAX_RATE_EXP) 293 exp = MAX_RATE_EXP; 294 } 295 296 *rate_mantissa = (tmp - 256000000) / 1000000; 297 *rate_exp = exp; 298 *rdiv = div; 299} 300 301int cn10k_map_unmap_rq_policer(struct otx2_nic *pfvf, int rq_idx, 302 u16 policer, bool map) 303{ 304 struct nix_cn10k_aq_enq_req *aq; 305 306 aq = otx2_mbox_alloc_msg_nix_cn10k_aq_enq(&pfvf->mbox); 307 if (!aq) 308 return -ENOMEM; 309 310 /* Enable policing and set the bandwidth profile (policer) index */ 311 if (map) 312 aq->rq.policer_ena = 1; 313 else 314 aq->rq.policer_ena = 0; 315 aq->rq_mask.policer_ena = 1; 316 317 aq->rq.band_prof_id = policer; 318 aq->rq_mask.band_prof_id = GENMASK(9, 0); 319 320 /* Fill AQ info */ 321 aq->qidx = rq_idx; 322 aq->ctype = NIX_AQ_CTYPE_RQ; 323 aq->op = NIX_AQ_INSTOP_WRITE; 324 325 return otx2_sync_mbox_msg(&pfvf->mbox); 326} 327 328int cn10k_free_leaf_profile(struct otx2_nic *pfvf, u16 leaf) 329{ 330 struct nix_bandprof_free_req *req; 331 332 req = otx2_mbox_alloc_msg_nix_bandprof_free(&pfvf->mbox); 333 if (!req) 334 return -ENOMEM; 335 336 req->prof_count[BAND_PROF_LEAF_LAYER] = 1; 337 req->prof_idx[BAND_PROF_LEAF_LAYER][0] = leaf; 338 339 return otx2_sync_mbox_msg(&pfvf->mbox); 340} 341 342int cn10k_free_matchall_ipolicer(struct otx2_nic *pfvf) 343{ 344 struct otx2_hw *hw = &pfvf->hw; 345 int qidx, rc; 346 347 mutex_lock(&pfvf->mbox.lock); 348 349 /* Remove RQ's policer mapping */ 350 for (qidx = 0; qidx < hw->rx_queues; qidx++) 351 cn10k_map_unmap_rq_policer(pfvf, qidx, 352 hw->matchall_ipolicer, false); 353 354 rc = cn10k_free_leaf_profile(pfvf, hw->matchall_ipolicer); 355 356 mutex_unlock(&pfvf->mbox.lock); 357 return rc; 358} 359 360int cn10k_set_ipolicer_rate(struct otx2_nic *pfvf, u16 profile, 361 u32 burst, u64 rate, bool pps) 362{ 363 struct nix_cn10k_aq_enq_req *aq; 364 u32 burst_exp, burst_mantissa; 365 u32 rate_exp, rate_mantissa; 366 u32 rdiv; 367 368 /* Get exponent and mantissa values for the desired rate */ 369 cn10k_get_ingress_burst_cfg(burst, &burst_exp, &burst_mantissa); 370 cn10k_get_ingress_rate_cfg(rate, &rate_exp, &rate_mantissa, &rdiv); 371 372 /* Init bandwidth profile */ 373 aq = otx2_mbox_alloc_msg_nix_cn10k_aq_enq(&pfvf->mbox); 374 if (!aq) 375 return -ENOMEM; 376 377 /* Set initial color mode to blind */ 378 aq->prof.icolor = 0x03; 379 aq->prof_mask.icolor = 0x03; 380 381 /* Set rate and burst values */ 382 aq->prof.cir_exponent = rate_exp; 383 aq->prof_mask.cir_exponent = 0x1F; 384 385 aq->prof.cir_mantissa = rate_mantissa; 386 aq->prof_mask.cir_mantissa = 0xFF; 387 388 aq->prof.cbs_exponent = burst_exp; 389 aq->prof_mask.cbs_exponent = 0x1F; 390 391 aq->prof.cbs_mantissa = burst_mantissa; 392 aq->prof_mask.cbs_mantissa = 0xFF; 393 394 aq->prof.rdiv = rdiv; 395 aq->prof_mask.rdiv = 0xF; 396 397 if (pps) { 398 /* The amount of decremented tokens is calculated according to 399 * the following equation: 400 * max([ LMODE ? 0 : (packet_length - LXPTR)] + 401 * ([ADJUST_MANTISSA]/256 - 1) * 2^[ADJUST_EXPONENT], 402 * 1/256) 403 * if LMODE is 1 then rate limiting will be based on 404 * PPS otherwise bps. 405 * The aim of the ADJUST value is to specify a token cost per 406 * packet in contrary to the packet length that specifies a 407 * cost per byte. To rate limit based on PPS adjust mantissa 408 * is set as 384 and exponent as 1 so that number of tokens 409 * decremented becomes 1 i.e, 1 token per packeet. 410 */ 411 aq->prof.adjust_exponent = 1; 412 aq->prof_mask.adjust_exponent = 0x1F; 413 414 aq->prof.adjust_mantissa = 384; 415 aq->prof_mask.adjust_mantissa = 0x1FF; 416 417 aq->prof.lmode = 0x1; 418 aq->prof_mask.lmode = 0x1; 419 } 420 421 /* Two rate three color marker 422 * With PEIR/EIR set to zero, color will be either green or red 423 */ 424 aq->prof.meter_algo = 2; 425 aq->prof_mask.meter_algo = 0x3; 426 427 aq->prof.rc_action = NIX_RX_BAND_PROF_ACTIONRESULT_DROP; 428 aq->prof_mask.rc_action = 0x3; 429 430 aq->prof.yc_action = NIX_RX_BAND_PROF_ACTIONRESULT_PASS; 431 aq->prof_mask.yc_action = 0x3; 432 433 aq->prof.gc_action = NIX_RX_BAND_PROF_ACTIONRESULT_PASS; 434 aq->prof_mask.gc_action = 0x3; 435 436 /* Setting exponent value as 24 and mantissa as 0 configures 437 * the bucket with zero values making bucket unused. Peak 438 * information rate and Excess information rate buckets are 439 * unused here. 440 */ 441 aq->prof.peir_exponent = 24; 442 aq->prof_mask.peir_exponent = 0x1F; 443 444 aq->prof.peir_mantissa = 0; 445 aq->prof_mask.peir_mantissa = 0xFF; 446 447 aq->prof.pebs_exponent = 24; 448 aq->prof_mask.pebs_exponent = 0x1F; 449 450 aq->prof.pebs_mantissa = 0; 451 aq->prof_mask.pebs_mantissa = 0xFF; 452 453 aq->prof.hl_en = 0; 454 aq->prof_mask.hl_en = 1; 455 456 /* Fill AQ info */ 457 aq->qidx = profile; 458 aq->ctype = NIX_AQ_CTYPE_BANDPROF; 459 aq->op = NIX_AQ_INSTOP_WRITE; 460 461 return otx2_sync_mbox_msg(&pfvf->mbox); 462} 463 464int cn10k_set_matchall_ipolicer_rate(struct otx2_nic *pfvf, 465 u32 burst, u64 rate) 466{ 467 struct otx2_hw *hw = &pfvf->hw; 468 int qidx, rc; 469 470 mutex_lock(&pfvf->mbox.lock); 471 472 rc = cn10k_set_ipolicer_rate(pfvf, hw->matchall_ipolicer, burst, 473 rate, false); 474 if (rc) 475 goto out; 476 477 for (qidx = 0; qidx < hw->rx_queues; qidx++) { 478 rc = cn10k_map_unmap_rq_policer(pfvf, qidx, 479 hw->matchall_ipolicer, true); 480 if (rc) 481 break; 482 } 483 484out: 485 mutex_unlock(&pfvf->mbox.lock); 486 return rc; 487} 488