1 // SPDX-License-Identifier: GPL-2.0 2 /* Marvell OcteonTx2 RVU Physcial Function ethernet driver 3 * 4 * Copyright (C) 2020 Marvell International Ltd. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/interrupt.h> 13 #include <linux/pci.h> 14 #include <linux/etherdevice.h> 15 #include <linux/of.h> 16 #include <linux/if_vlan.h> 17 #include <linux/iommu.h> 18 #include <net/ip.h> 19 20 #include "otx2_reg.h" 21 #include "otx2_common.h" 22 #include "otx2_txrx.h" 23 #include "otx2_struct.h" 24 25 #define DRV_NAME "octeontx2-nicpf" 26 #define DRV_STRING "Marvell OcteonTX2 NIC Physical Function Driver" 27 28 /* Supported devices */ 29 static const struct pci_device_id otx2_pf_id_table[] = { 30 { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVID_OCTEONTX2_RVU_PF) }, 31 { 0, } /* end of table */ 32 }; 33 34 MODULE_AUTHOR("Sunil Goutham <sgoutham@marvell.com>"); 35 MODULE_DESCRIPTION(DRV_STRING); 36 MODULE_LICENSE("GPL v2"); 37 MODULE_DEVICE_TABLE(pci, otx2_pf_id_table); 38 39 enum { 40 TYPE_PFAF, 41 TYPE_PFVF, 42 }; 43 44 static int otx2_change_mtu(struct net_device *netdev, int new_mtu) 45 { 46 bool if_up = netif_running(netdev); 47 int err = 0; 48 49 if (if_up) 50 otx2_stop(netdev); 51 52 netdev_info(netdev, "Changing MTU from %d to %d\n", 53 netdev->mtu, new_mtu); 54 netdev->mtu = new_mtu; 55 56 if (if_up) 57 err = otx2_open(netdev); 58 59 return err; 60 } 61 62 static void otx2_disable_flr_me_intr(struct otx2_nic *pf) 63 { 64 int irq, vfs = pf->total_vfs; 65 66 /* Disable VFs ME interrupts */ 67 otx2_write64(pf, RVU_PF_VFME_INT_ENA_W1CX(0), INTR_MASK(vfs)); 68 irq = pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFME0); 69 free_irq(irq, pf); 70 71 /* Disable VFs FLR interrupts */ 72 otx2_write64(pf, RVU_PF_VFFLR_INT_ENA_W1CX(0), INTR_MASK(vfs)); 73 irq = pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFFLR0); 74 free_irq(irq, pf); 75 76 if (vfs <= 64) 77 return; 78 79 otx2_write64(pf, RVU_PF_VFME_INT_ENA_W1CX(1), INTR_MASK(vfs - 64)); 80 irq = pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFME1); 81 free_irq(irq, pf); 82 83 otx2_write64(pf, RVU_PF_VFFLR_INT_ENA_W1CX(1), INTR_MASK(vfs - 64)); 84 irq = pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFFLR1); 85 free_irq(irq, pf); 86 } 87 88 static void otx2_flr_wq_destroy(struct otx2_nic *pf) 89 { 90 if (!pf->flr_wq) 91 return; 92 destroy_workqueue(pf->flr_wq); 93 pf->flr_wq = NULL; 94 devm_kfree(pf->dev, pf->flr_wrk); 95 } 96 97 static void otx2_flr_handler(struct work_struct *work) 98 { 99 struct flr_work *flrwork = container_of(work, struct flr_work, work); 100 struct otx2_nic *pf = flrwork->pf; 101 struct mbox *mbox = &pf->mbox; 102 struct msg_req *req; 103 int vf, reg = 0; 104 105 vf = flrwork - pf->flr_wrk; 106 107 mutex_lock(&mbox->lock); 108 req = otx2_mbox_alloc_msg_vf_flr(mbox); 109 if (!req) { 110 mutex_unlock(&mbox->lock); 111 return; 112 } 113 req->hdr.pcifunc &= RVU_PFVF_FUNC_MASK; 114 req->hdr.pcifunc |= (vf + 1) & RVU_PFVF_FUNC_MASK; 115 116 if (!otx2_sync_mbox_msg(&pf->mbox)) { 117 if (vf >= 64) { 118 reg = 1; 119 vf = vf - 64; 120 } 121 /* clear transcation pending bit */ 122 otx2_write64(pf, RVU_PF_VFTRPENDX(reg), BIT_ULL(vf)); 123 otx2_write64(pf, RVU_PF_VFFLR_INT_ENA_W1SX(reg), BIT_ULL(vf)); 124 } 125 126 mutex_unlock(&mbox->lock); 127 } 128 129 static irqreturn_t otx2_pf_flr_intr_handler(int irq, void *pf_irq) 130 { 131 struct otx2_nic *pf = (struct otx2_nic *)pf_irq; 132 int reg, dev, vf, start_vf, num_reg = 1; 133 u64 intr; 134 135 if (pf->total_vfs > 64) 136 num_reg = 2; 137 138 for (reg = 0; reg < num_reg; reg++) { 139 intr = otx2_read64(pf, RVU_PF_VFFLR_INTX(reg)); 140 if (!intr) 141 continue; 142 start_vf = 64 * reg; 143 for (vf = 0; vf < 64; vf++) { 144 if (!(intr & BIT_ULL(vf))) 145 continue; 146 dev = vf + start_vf; 147 queue_work(pf->flr_wq, &pf->flr_wrk[dev].work); 148 /* Clear interrupt */ 149 otx2_write64(pf, RVU_PF_VFFLR_INTX(reg), BIT_ULL(vf)); 150 /* Disable the interrupt */ 151 otx2_write64(pf, RVU_PF_VFFLR_INT_ENA_W1CX(reg), 152 BIT_ULL(vf)); 153 } 154 } 155 return IRQ_HANDLED; 156 } 157 158 static irqreturn_t otx2_pf_me_intr_handler(int irq, void *pf_irq) 159 { 160 struct otx2_nic *pf = (struct otx2_nic *)pf_irq; 161 int vf, reg, num_reg = 1; 162 u64 intr; 163 164 if (pf->total_vfs > 64) 165 num_reg = 2; 166 167 for (reg = 0; reg < num_reg; reg++) { 168 intr = otx2_read64(pf, RVU_PF_VFME_INTX(reg)); 169 if (!intr) 170 continue; 171 for (vf = 0; vf < 64; vf++) { 172 if (!(intr & BIT_ULL(vf))) 173 continue; 174 /* clear trpend bit */ 175 otx2_write64(pf, RVU_PF_VFTRPENDX(reg), BIT_ULL(vf)); 176 /* clear interrupt */ 177 otx2_write64(pf, RVU_PF_VFME_INTX(reg), BIT_ULL(vf)); 178 } 179 } 180 return IRQ_HANDLED; 181 } 182 183 static int otx2_register_flr_me_intr(struct otx2_nic *pf, int numvfs) 184 { 185 struct otx2_hw *hw = &pf->hw; 186 char *irq_name; 187 int ret; 188 189 /* Register ME interrupt handler*/ 190 irq_name = &hw->irq_name[RVU_PF_INT_VEC_VFME0 * NAME_SIZE]; 191 snprintf(irq_name, NAME_SIZE, "RVUPF%d_ME0", rvu_get_pf(pf->pcifunc)); 192 ret = request_irq(pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFME0), 193 otx2_pf_me_intr_handler, 0, irq_name, pf); 194 if (ret) { 195 dev_err(pf->dev, 196 "RVUPF: IRQ registration failed for ME0\n"); 197 } 198 199 /* Register FLR interrupt handler */ 200 irq_name = &hw->irq_name[RVU_PF_INT_VEC_VFFLR0 * NAME_SIZE]; 201 snprintf(irq_name, NAME_SIZE, "RVUPF%d_FLR0", rvu_get_pf(pf->pcifunc)); 202 ret = request_irq(pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFFLR0), 203 otx2_pf_flr_intr_handler, 0, irq_name, pf); 204 if (ret) { 205 dev_err(pf->dev, 206 "RVUPF: IRQ registration failed for FLR0\n"); 207 return ret; 208 } 209 210 if (numvfs > 64) { 211 irq_name = &hw->irq_name[RVU_PF_INT_VEC_VFME1 * NAME_SIZE]; 212 snprintf(irq_name, NAME_SIZE, "RVUPF%d_ME1", 213 rvu_get_pf(pf->pcifunc)); 214 ret = request_irq(pci_irq_vector 215 (pf->pdev, RVU_PF_INT_VEC_VFME1), 216 otx2_pf_me_intr_handler, 0, irq_name, pf); 217 if (ret) { 218 dev_err(pf->dev, 219 "RVUPF: IRQ registration failed for ME1\n"); 220 } 221 irq_name = &hw->irq_name[RVU_PF_INT_VEC_VFFLR1 * NAME_SIZE]; 222 snprintf(irq_name, NAME_SIZE, "RVUPF%d_FLR1", 223 rvu_get_pf(pf->pcifunc)); 224 ret = request_irq(pci_irq_vector 225 (pf->pdev, RVU_PF_INT_VEC_VFFLR1), 226 otx2_pf_flr_intr_handler, 0, irq_name, pf); 227 if (ret) { 228 dev_err(pf->dev, 229 "RVUPF: IRQ registration failed for FLR1\n"); 230 return ret; 231 } 232 } 233 234 /* Enable ME interrupt for all VFs*/ 235 otx2_write64(pf, RVU_PF_VFME_INTX(0), INTR_MASK(numvfs)); 236 otx2_write64(pf, RVU_PF_VFME_INT_ENA_W1SX(0), INTR_MASK(numvfs)); 237 238 /* Enable FLR interrupt for all VFs*/ 239 otx2_write64(pf, RVU_PF_VFFLR_INTX(0), INTR_MASK(numvfs)); 240 otx2_write64(pf, RVU_PF_VFFLR_INT_ENA_W1SX(0), INTR_MASK(numvfs)); 241 242 if (numvfs > 64) { 243 numvfs -= 64; 244 245 otx2_write64(pf, RVU_PF_VFME_INTX(1), INTR_MASK(numvfs)); 246 otx2_write64(pf, RVU_PF_VFME_INT_ENA_W1SX(1), 247 INTR_MASK(numvfs)); 248 249 otx2_write64(pf, RVU_PF_VFFLR_INTX(1), INTR_MASK(numvfs)); 250 otx2_write64(pf, RVU_PF_VFFLR_INT_ENA_W1SX(1), 251 INTR_MASK(numvfs)); 252 } 253 return 0; 254 } 255 256 static int otx2_pf_flr_init(struct otx2_nic *pf, int num_vfs) 257 { 258 int vf; 259 260 pf->flr_wq = alloc_workqueue("otx2_pf_flr_wq", 261 WQ_UNBOUND | WQ_HIGHPRI, 1); 262 if (!pf->flr_wq) 263 return -ENOMEM; 264 265 pf->flr_wrk = devm_kcalloc(pf->dev, num_vfs, 266 sizeof(struct flr_work), GFP_KERNEL); 267 if (!pf->flr_wrk) { 268 destroy_workqueue(pf->flr_wq); 269 return -ENOMEM; 270 } 271 272 for (vf = 0; vf < num_vfs; vf++) { 273 pf->flr_wrk[vf].pf = pf; 274 INIT_WORK(&pf->flr_wrk[vf].work, otx2_flr_handler); 275 } 276 277 return 0; 278 } 279 280 static void otx2_queue_work(struct mbox *mw, struct workqueue_struct *mbox_wq, 281 int first, int mdevs, u64 intr, int type) 282 { 283 struct otx2_mbox_dev *mdev; 284 struct otx2_mbox *mbox; 285 struct mbox_hdr *hdr; 286 int i; 287 288 for (i = first; i < mdevs; i++) { 289 /* start from 0 */ 290 if (!(intr & BIT_ULL(i - first))) 291 continue; 292 293 mbox = &mw->mbox; 294 mdev = &mbox->dev[i]; 295 if (type == TYPE_PFAF) 296 otx2_sync_mbox_bbuf(mbox, i); 297 hdr = mdev->mbase + mbox->rx_start; 298 /* The hdr->num_msgs is set to zero immediately in the interrupt 299 * handler to ensure that it holds a correct value next time 300 * when the interrupt handler is called. 301 * pf->mbox.num_msgs holds the data for use in pfaf_mbox_handler 302 * pf>mbox.up_num_msgs holds the data for use in 303 * pfaf_mbox_up_handler. 304 */ 305 if (hdr->num_msgs) { 306 mw[i].num_msgs = hdr->num_msgs; 307 hdr->num_msgs = 0; 308 if (type == TYPE_PFAF) 309 memset(mbox->hwbase + mbox->rx_start, 0, 310 ALIGN(sizeof(struct mbox_hdr), 311 sizeof(u64))); 312 313 queue_work(mbox_wq, &mw[i].mbox_wrk); 314 } 315 316 mbox = &mw->mbox_up; 317 mdev = &mbox->dev[i]; 318 if (type == TYPE_PFAF) 319 otx2_sync_mbox_bbuf(mbox, i); 320 hdr = mdev->mbase + mbox->rx_start; 321 if (hdr->num_msgs) { 322 mw[i].up_num_msgs = hdr->num_msgs; 323 hdr->num_msgs = 0; 324 if (type == TYPE_PFAF) 325 memset(mbox->hwbase + mbox->rx_start, 0, 326 ALIGN(sizeof(struct mbox_hdr), 327 sizeof(u64))); 328 329 queue_work(mbox_wq, &mw[i].mbox_up_wrk); 330 } 331 } 332 } 333 334 static void otx2_forward_msg_pfvf(struct otx2_mbox_dev *mdev, 335 struct otx2_mbox *pfvf_mbox, void *bbuf_base, 336 int devid) 337 { 338 struct otx2_mbox_dev *src_mdev = mdev; 339 int offset; 340 341 /* Msgs are already copied, trigger VF's mbox irq */ 342 smp_wmb(); 343 344 offset = pfvf_mbox->trigger | (devid << pfvf_mbox->tr_shift); 345 writeq(1, (void __iomem *)pfvf_mbox->reg_base + offset); 346 347 /* Restore VF's mbox bounce buffer region address */ 348 src_mdev->mbase = bbuf_base; 349 } 350 351 static int otx2_forward_vf_mbox_msgs(struct otx2_nic *pf, 352 struct otx2_mbox *src_mbox, 353 int dir, int vf, int num_msgs) 354 { 355 struct otx2_mbox_dev *src_mdev, *dst_mdev; 356 struct mbox_hdr *mbox_hdr; 357 struct mbox_hdr *req_hdr; 358 struct mbox *dst_mbox; 359 int dst_size, err; 360 361 if (dir == MBOX_DIR_PFAF) { 362 /* Set VF's mailbox memory as PF's bounce buffer memory, so 363 * that explicit copying of VF's msgs to PF=>AF mbox region 364 * and AF=>PF responses to VF's mbox region can be avoided. 365 */ 366 src_mdev = &src_mbox->dev[vf]; 367 mbox_hdr = src_mbox->hwbase + 368 src_mbox->rx_start + (vf * MBOX_SIZE); 369 370 dst_mbox = &pf->mbox; 371 dst_size = dst_mbox->mbox.tx_size - 372 ALIGN(sizeof(*mbox_hdr), MBOX_MSG_ALIGN); 373 /* Check if msgs fit into destination area */ 374 if (mbox_hdr->msg_size > dst_size) 375 return -EINVAL; 376 377 dst_mdev = &dst_mbox->mbox.dev[0]; 378 379 mutex_lock(&pf->mbox.lock); 380 dst_mdev->mbase = src_mdev->mbase; 381 dst_mdev->msg_size = mbox_hdr->msg_size; 382 dst_mdev->num_msgs = num_msgs; 383 err = otx2_sync_mbox_msg(dst_mbox); 384 if (err) { 385 dev_warn(pf->dev, 386 "AF not responding to VF%d messages\n", vf); 387 /* restore PF mbase and exit */ 388 dst_mdev->mbase = pf->mbox.bbuf_base; 389 mutex_unlock(&pf->mbox.lock); 390 return err; 391 } 392 /* At this point, all the VF messages sent to AF are acked 393 * with proper responses and responses are copied to VF 394 * mailbox hence raise interrupt to VF. 395 */ 396 req_hdr = (struct mbox_hdr *)(dst_mdev->mbase + 397 dst_mbox->mbox.rx_start); 398 req_hdr->num_msgs = num_msgs; 399 400 otx2_forward_msg_pfvf(dst_mdev, &pf->mbox_pfvf[0].mbox, 401 pf->mbox.bbuf_base, vf); 402 mutex_unlock(&pf->mbox.lock); 403 } else if (dir == MBOX_DIR_PFVF_UP) { 404 src_mdev = &src_mbox->dev[0]; 405 mbox_hdr = src_mbox->hwbase + src_mbox->rx_start; 406 req_hdr = (struct mbox_hdr *)(src_mdev->mbase + 407 src_mbox->rx_start); 408 req_hdr->num_msgs = num_msgs; 409 410 dst_mbox = &pf->mbox_pfvf[0]; 411 dst_size = dst_mbox->mbox_up.tx_size - 412 ALIGN(sizeof(*mbox_hdr), MBOX_MSG_ALIGN); 413 /* Check if msgs fit into destination area */ 414 if (mbox_hdr->msg_size > dst_size) 415 return -EINVAL; 416 417 dst_mdev = &dst_mbox->mbox_up.dev[vf]; 418 dst_mdev->mbase = src_mdev->mbase; 419 dst_mdev->msg_size = mbox_hdr->msg_size; 420 dst_mdev->num_msgs = mbox_hdr->num_msgs; 421 err = otx2_sync_mbox_up_msg(dst_mbox, vf); 422 if (err) { 423 dev_warn(pf->dev, 424 "VF%d is not responding to mailbox\n", vf); 425 return err; 426 } 427 } else if (dir == MBOX_DIR_VFPF_UP) { 428 req_hdr = (struct mbox_hdr *)(src_mbox->dev[0].mbase + 429 src_mbox->rx_start); 430 req_hdr->num_msgs = num_msgs; 431 otx2_forward_msg_pfvf(&pf->mbox_pfvf->mbox_up.dev[vf], 432 &pf->mbox.mbox_up, 433 pf->mbox_pfvf[vf].bbuf_base, 434 0); 435 } 436 437 return 0; 438 } 439 440 static void otx2_pfvf_mbox_handler(struct work_struct *work) 441 { 442 struct mbox_msghdr *msg = NULL; 443 int offset, vf_idx, id, err; 444 struct otx2_mbox_dev *mdev; 445 struct mbox_hdr *req_hdr; 446 struct otx2_mbox *mbox; 447 struct mbox *vf_mbox; 448 struct otx2_nic *pf; 449 450 vf_mbox = container_of(work, struct mbox, mbox_wrk); 451 pf = vf_mbox->pfvf; 452 vf_idx = vf_mbox - pf->mbox_pfvf; 453 454 mbox = &pf->mbox_pfvf[0].mbox; 455 mdev = &mbox->dev[vf_idx]; 456 req_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start); 457 458 offset = ALIGN(sizeof(*req_hdr), MBOX_MSG_ALIGN); 459 460 for (id = 0; id < vf_mbox->num_msgs; id++) { 461 msg = (struct mbox_msghdr *)(mdev->mbase + mbox->rx_start + 462 offset); 463 464 if (msg->sig != OTX2_MBOX_REQ_SIG) 465 goto inval_msg; 466 467 /* Set VF's number in each of the msg */ 468 msg->pcifunc &= RVU_PFVF_FUNC_MASK; 469 msg->pcifunc |= (vf_idx + 1) & RVU_PFVF_FUNC_MASK; 470 offset = msg->next_msgoff; 471 } 472 err = otx2_forward_vf_mbox_msgs(pf, mbox, MBOX_DIR_PFAF, vf_idx, 473 vf_mbox->num_msgs); 474 if (err) 475 goto inval_msg; 476 return; 477 478 inval_msg: 479 otx2_reply_invalid_msg(mbox, vf_idx, 0, msg->id); 480 otx2_mbox_msg_send(mbox, vf_idx); 481 } 482 483 static void otx2_pfvf_mbox_up_handler(struct work_struct *work) 484 { 485 struct mbox *vf_mbox = container_of(work, struct mbox, mbox_up_wrk); 486 struct otx2_nic *pf = vf_mbox->pfvf; 487 struct otx2_mbox_dev *mdev; 488 int offset, id, vf_idx = 0; 489 struct mbox_hdr *rsp_hdr; 490 struct mbox_msghdr *msg; 491 struct otx2_mbox *mbox; 492 493 vf_idx = vf_mbox - pf->mbox_pfvf; 494 mbox = &pf->mbox_pfvf[0].mbox_up; 495 mdev = &mbox->dev[vf_idx]; 496 497 rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start); 498 offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN); 499 500 for (id = 0; id < vf_mbox->up_num_msgs; id++) { 501 msg = mdev->mbase + offset; 502 503 if (msg->id >= MBOX_MSG_MAX) { 504 dev_err(pf->dev, 505 "Mbox msg with unknown ID 0x%x\n", msg->id); 506 goto end; 507 } 508 509 if (msg->sig != OTX2_MBOX_RSP_SIG) { 510 dev_err(pf->dev, 511 "Mbox msg with wrong signature %x, ID 0x%x\n", 512 msg->sig, msg->id); 513 goto end; 514 } 515 516 switch (msg->id) { 517 case MBOX_MSG_CGX_LINK_EVENT: 518 break; 519 default: 520 if (msg->rc) 521 dev_err(pf->dev, 522 "Mbox msg response has err %d, ID 0x%x\n", 523 msg->rc, msg->id); 524 break; 525 } 526 527 end: 528 offset = mbox->rx_start + msg->next_msgoff; 529 mdev->msgs_acked++; 530 } 531 532 otx2_mbox_reset(mbox, vf_idx); 533 } 534 535 static irqreturn_t otx2_pfvf_mbox_intr_handler(int irq, void *pf_irq) 536 { 537 struct otx2_nic *pf = (struct otx2_nic *)(pf_irq); 538 int vfs = pf->total_vfs; 539 struct mbox *mbox; 540 u64 intr; 541 542 mbox = pf->mbox_pfvf; 543 /* Handle VF interrupts */ 544 if (vfs > 64) { 545 intr = otx2_read64(pf, RVU_PF_VFPF_MBOX_INTX(1)); 546 otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(1), intr); 547 otx2_queue_work(mbox, pf->mbox_pfvf_wq, 64, vfs, intr, 548 TYPE_PFVF); 549 vfs -= 64; 550 } 551 552 intr = otx2_read64(pf, RVU_PF_VFPF_MBOX_INTX(0)); 553 otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(0), intr); 554 555 otx2_queue_work(mbox, pf->mbox_pfvf_wq, 0, vfs, intr, TYPE_PFVF); 556 557 return IRQ_HANDLED; 558 } 559 560 static int otx2_pfvf_mbox_init(struct otx2_nic *pf, int numvfs) 561 { 562 void __iomem *hwbase; 563 struct mbox *mbox; 564 int err, vf; 565 u64 base; 566 567 if (!numvfs) 568 return -EINVAL; 569 570 pf->mbox_pfvf = devm_kcalloc(&pf->pdev->dev, numvfs, 571 sizeof(struct mbox), GFP_KERNEL); 572 if (!pf->mbox_pfvf) 573 return -ENOMEM; 574 575 pf->mbox_pfvf_wq = alloc_workqueue("otx2_pfvf_mailbox", 576 WQ_UNBOUND | WQ_HIGHPRI | 577 WQ_MEM_RECLAIM, 1); 578 if (!pf->mbox_pfvf_wq) 579 return -ENOMEM; 580 581 base = readq((void __iomem *)((u64)pf->reg_base + RVU_PF_VF_BAR4_ADDR)); 582 hwbase = ioremap_wc(base, MBOX_SIZE * pf->total_vfs); 583 584 if (!hwbase) { 585 err = -ENOMEM; 586 goto free_wq; 587 } 588 589 mbox = &pf->mbox_pfvf[0]; 590 err = otx2_mbox_init(&mbox->mbox, hwbase, pf->pdev, pf->reg_base, 591 MBOX_DIR_PFVF, numvfs); 592 if (err) 593 goto free_iomem; 594 595 err = otx2_mbox_init(&mbox->mbox_up, hwbase, pf->pdev, pf->reg_base, 596 MBOX_DIR_PFVF_UP, numvfs); 597 if (err) 598 goto free_iomem; 599 600 for (vf = 0; vf < numvfs; vf++) { 601 mbox->pfvf = pf; 602 INIT_WORK(&mbox->mbox_wrk, otx2_pfvf_mbox_handler); 603 INIT_WORK(&mbox->mbox_up_wrk, otx2_pfvf_mbox_up_handler); 604 mbox++; 605 } 606 607 return 0; 608 609 free_iomem: 610 if (hwbase) 611 iounmap(hwbase); 612 free_wq: 613 destroy_workqueue(pf->mbox_pfvf_wq); 614 return err; 615 } 616 617 static void otx2_pfvf_mbox_destroy(struct otx2_nic *pf) 618 { 619 struct mbox *mbox = &pf->mbox_pfvf[0]; 620 621 if (!mbox) 622 return; 623 624 if (pf->mbox_pfvf_wq) { 625 destroy_workqueue(pf->mbox_pfvf_wq); 626 pf->mbox_pfvf_wq = NULL; 627 } 628 629 if (mbox->mbox.hwbase) 630 iounmap(mbox->mbox.hwbase); 631 632 otx2_mbox_destroy(&mbox->mbox); 633 } 634 635 static void otx2_enable_pfvf_mbox_intr(struct otx2_nic *pf, int numvfs) 636 { 637 /* Clear PF <=> VF mailbox IRQ */ 638 otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(0), ~0ull); 639 otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(1), ~0ull); 640 641 /* Enable PF <=> VF mailbox IRQ */ 642 otx2_write64(pf, RVU_PF_VFPF_MBOX_INT_ENA_W1SX(0), INTR_MASK(numvfs)); 643 if (numvfs > 64) { 644 numvfs -= 64; 645 otx2_write64(pf, RVU_PF_VFPF_MBOX_INT_ENA_W1SX(1), 646 INTR_MASK(numvfs)); 647 } 648 } 649 650 static void otx2_disable_pfvf_mbox_intr(struct otx2_nic *pf, int numvfs) 651 { 652 int vector; 653 654 /* Disable PF <=> VF mailbox IRQ */ 655 otx2_write64(pf, RVU_PF_VFPF_MBOX_INT_ENA_W1CX(0), ~0ull); 656 otx2_write64(pf, RVU_PF_VFPF_MBOX_INT_ENA_W1CX(1), ~0ull); 657 658 otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(0), ~0ull); 659 vector = pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFPF_MBOX0); 660 free_irq(vector, pf); 661 662 if (numvfs > 64) { 663 otx2_write64(pf, RVU_PF_VFPF_MBOX_INTX(1), ~0ull); 664 vector = pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFPF_MBOX1); 665 free_irq(vector, pf); 666 } 667 } 668 669 static int otx2_register_pfvf_mbox_intr(struct otx2_nic *pf, int numvfs) 670 { 671 struct otx2_hw *hw = &pf->hw; 672 char *irq_name; 673 int err; 674 675 /* Register MBOX0 interrupt handler */ 676 irq_name = &hw->irq_name[RVU_PF_INT_VEC_VFPF_MBOX0 * NAME_SIZE]; 677 if (pf->pcifunc) 678 snprintf(irq_name, NAME_SIZE, 679 "RVUPF%d_VF Mbox0", rvu_get_pf(pf->pcifunc)); 680 else 681 snprintf(irq_name, NAME_SIZE, "RVUPF_VF Mbox0"); 682 err = request_irq(pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_VFPF_MBOX0), 683 otx2_pfvf_mbox_intr_handler, 0, irq_name, pf); 684 if (err) { 685 dev_err(pf->dev, 686 "RVUPF: IRQ registration failed for PFVF mbox0 irq\n"); 687 return err; 688 } 689 690 if (numvfs > 64) { 691 /* Register MBOX1 interrupt handler */ 692 irq_name = &hw->irq_name[RVU_PF_INT_VEC_VFPF_MBOX1 * NAME_SIZE]; 693 if (pf->pcifunc) 694 snprintf(irq_name, NAME_SIZE, 695 "RVUPF%d_VF Mbox1", rvu_get_pf(pf->pcifunc)); 696 else 697 snprintf(irq_name, NAME_SIZE, "RVUPF_VF Mbox1"); 698 err = request_irq(pci_irq_vector(pf->pdev, 699 RVU_PF_INT_VEC_VFPF_MBOX1), 700 otx2_pfvf_mbox_intr_handler, 701 0, irq_name, pf); 702 if (err) { 703 dev_err(pf->dev, 704 "RVUPF: IRQ registration failed for PFVF mbox1 irq\n"); 705 return err; 706 } 707 } 708 709 otx2_enable_pfvf_mbox_intr(pf, numvfs); 710 711 return 0; 712 } 713 714 static void otx2_process_pfaf_mbox_msg(struct otx2_nic *pf, 715 struct mbox_msghdr *msg) 716 { 717 int devid; 718 719 if (msg->id >= MBOX_MSG_MAX) { 720 dev_err(pf->dev, 721 "Mbox msg with unknown ID 0x%x\n", msg->id); 722 return; 723 } 724 725 if (msg->sig != OTX2_MBOX_RSP_SIG) { 726 dev_err(pf->dev, 727 "Mbox msg with wrong signature %x, ID 0x%x\n", 728 msg->sig, msg->id); 729 return; 730 } 731 732 /* message response heading VF */ 733 devid = msg->pcifunc & RVU_PFVF_FUNC_MASK; 734 if (devid) { 735 struct otx2_vf_config *config = &pf->vf_configs[devid - 1]; 736 struct delayed_work *dwork; 737 738 switch (msg->id) { 739 case MBOX_MSG_NIX_LF_START_RX: 740 config->intf_down = false; 741 dwork = &config->link_event_work; 742 schedule_delayed_work(dwork, msecs_to_jiffies(100)); 743 break; 744 case MBOX_MSG_NIX_LF_STOP_RX: 745 config->intf_down = true; 746 break; 747 } 748 749 return; 750 } 751 752 switch (msg->id) { 753 case MBOX_MSG_READY: 754 pf->pcifunc = msg->pcifunc; 755 break; 756 case MBOX_MSG_MSIX_OFFSET: 757 mbox_handler_msix_offset(pf, (struct msix_offset_rsp *)msg); 758 break; 759 case MBOX_MSG_NPA_LF_ALLOC: 760 mbox_handler_npa_lf_alloc(pf, (struct npa_lf_alloc_rsp *)msg); 761 break; 762 case MBOX_MSG_NIX_LF_ALLOC: 763 mbox_handler_nix_lf_alloc(pf, (struct nix_lf_alloc_rsp *)msg); 764 break; 765 case MBOX_MSG_NIX_TXSCH_ALLOC: 766 mbox_handler_nix_txsch_alloc(pf, 767 (struct nix_txsch_alloc_rsp *)msg); 768 break; 769 case MBOX_MSG_NIX_BP_ENABLE: 770 mbox_handler_nix_bp_enable(pf, (struct nix_bp_cfg_rsp *)msg); 771 break; 772 case MBOX_MSG_CGX_STATS: 773 mbox_handler_cgx_stats(pf, (struct cgx_stats_rsp *)msg); 774 break; 775 default: 776 if (msg->rc) 777 dev_err(pf->dev, 778 "Mbox msg response has err %d, ID 0x%x\n", 779 msg->rc, msg->id); 780 break; 781 } 782 } 783 784 static void otx2_pfaf_mbox_handler(struct work_struct *work) 785 { 786 struct otx2_mbox_dev *mdev; 787 struct mbox_hdr *rsp_hdr; 788 struct mbox_msghdr *msg; 789 struct otx2_mbox *mbox; 790 struct mbox *af_mbox; 791 struct otx2_nic *pf; 792 int offset, id; 793 794 af_mbox = container_of(work, struct mbox, mbox_wrk); 795 mbox = &af_mbox->mbox; 796 mdev = &mbox->dev[0]; 797 rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start); 798 799 offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN); 800 pf = af_mbox->pfvf; 801 802 for (id = 0; id < af_mbox->num_msgs; id++) { 803 msg = (struct mbox_msghdr *)(mdev->mbase + offset); 804 otx2_process_pfaf_mbox_msg(pf, msg); 805 offset = mbox->rx_start + msg->next_msgoff; 806 mdev->msgs_acked++; 807 } 808 809 otx2_mbox_reset(mbox, 0); 810 } 811 812 static void otx2_handle_link_event(struct otx2_nic *pf) 813 { 814 struct cgx_link_user_info *linfo = &pf->linfo; 815 struct net_device *netdev = pf->netdev; 816 817 pr_info("%s NIC Link is %s %d Mbps %s duplex\n", netdev->name, 818 linfo->link_up ? "UP" : "DOWN", linfo->speed, 819 linfo->full_duplex ? "Full" : "Half"); 820 if (linfo->link_up) { 821 netif_carrier_on(netdev); 822 netif_tx_start_all_queues(netdev); 823 } else { 824 netif_tx_stop_all_queues(netdev); 825 netif_carrier_off(netdev); 826 } 827 } 828 829 int otx2_mbox_up_handler_cgx_link_event(struct otx2_nic *pf, 830 struct cgx_link_info_msg *msg, 831 struct msg_rsp *rsp) 832 { 833 int i; 834 835 /* Copy the link info sent by AF */ 836 pf->linfo = msg->link_info; 837 838 /* notify VFs about link event */ 839 for (i = 0; i < pci_num_vf(pf->pdev); i++) { 840 struct otx2_vf_config *config = &pf->vf_configs[i]; 841 struct delayed_work *dwork = &config->link_event_work; 842 843 if (config->intf_down) 844 continue; 845 846 schedule_delayed_work(dwork, msecs_to_jiffies(100)); 847 } 848 849 /* interface has not been fully configured yet */ 850 if (pf->flags & OTX2_FLAG_INTF_DOWN) 851 return 0; 852 853 otx2_handle_link_event(pf); 854 return 0; 855 } 856 857 static int otx2_process_mbox_msg_up(struct otx2_nic *pf, 858 struct mbox_msghdr *req) 859 { 860 /* Check if valid, if not reply with a invalid msg */ 861 if (req->sig != OTX2_MBOX_REQ_SIG) { 862 otx2_reply_invalid_msg(&pf->mbox.mbox_up, 0, 0, req->id); 863 return -ENODEV; 864 } 865 866 switch (req->id) { 867 #define M(_name, _id, _fn_name, _req_type, _rsp_type) \ 868 case _id: { \ 869 struct _rsp_type *rsp; \ 870 int err; \ 871 \ 872 rsp = (struct _rsp_type *)otx2_mbox_alloc_msg( \ 873 &pf->mbox.mbox_up, 0, \ 874 sizeof(struct _rsp_type)); \ 875 if (!rsp) \ 876 return -ENOMEM; \ 877 \ 878 rsp->hdr.id = _id; \ 879 rsp->hdr.sig = OTX2_MBOX_RSP_SIG; \ 880 rsp->hdr.pcifunc = 0; \ 881 rsp->hdr.rc = 0; \ 882 \ 883 err = otx2_mbox_up_handler_ ## _fn_name( \ 884 pf, (struct _req_type *)req, rsp); \ 885 return err; \ 886 } 887 MBOX_UP_CGX_MESSAGES 888 #undef M 889 break; 890 default: 891 otx2_reply_invalid_msg(&pf->mbox.mbox_up, 0, 0, req->id); 892 return -ENODEV; 893 } 894 return 0; 895 } 896 897 static void otx2_pfaf_mbox_up_handler(struct work_struct *work) 898 { 899 struct mbox *af_mbox = container_of(work, struct mbox, mbox_up_wrk); 900 struct otx2_mbox *mbox = &af_mbox->mbox_up; 901 struct otx2_mbox_dev *mdev = &mbox->dev[0]; 902 struct otx2_nic *pf = af_mbox->pfvf; 903 int offset, id, devid = 0; 904 struct mbox_hdr *rsp_hdr; 905 struct mbox_msghdr *msg; 906 907 rsp_hdr = (struct mbox_hdr *)(mdev->mbase + mbox->rx_start); 908 909 offset = mbox->rx_start + ALIGN(sizeof(*rsp_hdr), MBOX_MSG_ALIGN); 910 911 for (id = 0; id < af_mbox->up_num_msgs; id++) { 912 msg = (struct mbox_msghdr *)(mdev->mbase + offset); 913 914 devid = msg->pcifunc & RVU_PFVF_FUNC_MASK; 915 /* Skip processing VF's messages */ 916 if (!devid) 917 otx2_process_mbox_msg_up(pf, msg); 918 offset = mbox->rx_start + msg->next_msgoff; 919 } 920 if (devid) { 921 otx2_forward_vf_mbox_msgs(pf, &pf->mbox.mbox_up, 922 MBOX_DIR_PFVF_UP, devid - 1, 923 af_mbox->up_num_msgs); 924 return; 925 } 926 927 otx2_mbox_msg_send(mbox, 0); 928 } 929 930 static irqreturn_t otx2_pfaf_mbox_intr_handler(int irq, void *pf_irq) 931 { 932 struct otx2_nic *pf = (struct otx2_nic *)pf_irq; 933 struct mbox *mbox; 934 935 /* Clear the IRQ */ 936 otx2_write64(pf, RVU_PF_INT, BIT_ULL(0)); 937 938 mbox = &pf->mbox; 939 otx2_queue_work(mbox, pf->mbox_wq, 0, 1, 1, TYPE_PFAF); 940 941 return IRQ_HANDLED; 942 } 943 944 static void otx2_disable_mbox_intr(struct otx2_nic *pf) 945 { 946 int vector = pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_AFPF_MBOX); 947 948 /* Disable AF => PF mailbox IRQ */ 949 otx2_write64(pf, RVU_PF_INT_ENA_W1C, BIT_ULL(0)); 950 free_irq(vector, pf); 951 } 952 953 static int otx2_register_mbox_intr(struct otx2_nic *pf, bool probe_af) 954 { 955 struct otx2_hw *hw = &pf->hw; 956 struct msg_req *req; 957 char *irq_name; 958 int err; 959 960 /* Register mailbox interrupt handler */ 961 irq_name = &hw->irq_name[RVU_PF_INT_VEC_AFPF_MBOX * NAME_SIZE]; 962 snprintf(irq_name, NAME_SIZE, "RVUPFAF Mbox"); 963 err = request_irq(pci_irq_vector(pf->pdev, RVU_PF_INT_VEC_AFPF_MBOX), 964 otx2_pfaf_mbox_intr_handler, 0, irq_name, pf); 965 if (err) { 966 dev_err(pf->dev, 967 "RVUPF: IRQ registration failed for PFAF mbox irq\n"); 968 return err; 969 } 970 971 /* Enable mailbox interrupt for msgs coming from AF. 972 * First clear to avoid spurious interrupts, if any. 973 */ 974 otx2_write64(pf, RVU_PF_INT, BIT_ULL(0)); 975 otx2_write64(pf, RVU_PF_INT_ENA_W1S, BIT_ULL(0)); 976 977 if (!probe_af) 978 return 0; 979 980 /* Check mailbox communication with AF */ 981 req = otx2_mbox_alloc_msg_ready(&pf->mbox); 982 if (!req) { 983 otx2_disable_mbox_intr(pf); 984 return -ENOMEM; 985 } 986 err = otx2_sync_mbox_msg(&pf->mbox); 987 if (err) { 988 dev_warn(pf->dev, 989 "AF not responding to mailbox, deferring probe\n"); 990 otx2_disable_mbox_intr(pf); 991 return -EPROBE_DEFER; 992 } 993 994 return 0; 995 } 996 997 static void otx2_pfaf_mbox_destroy(struct otx2_nic *pf) 998 { 999 struct mbox *mbox = &pf->mbox; 1000 1001 if (pf->mbox_wq) { 1002 destroy_workqueue(pf->mbox_wq); 1003 pf->mbox_wq = NULL; 1004 } 1005 1006 if (mbox->mbox.hwbase) 1007 iounmap((void __iomem *)mbox->mbox.hwbase); 1008 1009 otx2_mbox_destroy(&mbox->mbox); 1010 otx2_mbox_destroy(&mbox->mbox_up); 1011 } 1012 1013 static int otx2_pfaf_mbox_init(struct otx2_nic *pf) 1014 { 1015 struct mbox *mbox = &pf->mbox; 1016 void __iomem *hwbase; 1017 int err; 1018 1019 mbox->pfvf = pf; 1020 pf->mbox_wq = alloc_workqueue("otx2_pfaf_mailbox", 1021 WQ_UNBOUND | WQ_HIGHPRI | 1022 WQ_MEM_RECLAIM, 1); 1023 if (!pf->mbox_wq) 1024 return -ENOMEM; 1025 1026 /* Mailbox is a reserved memory (in RAM) region shared between 1027 * admin function (i.e AF) and this PF, shouldn't be mapped as 1028 * device memory to allow unaligned accesses. 1029 */ 1030 hwbase = ioremap_wc(pci_resource_start(pf->pdev, PCI_MBOX_BAR_NUM), 1031 pci_resource_len(pf->pdev, PCI_MBOX_BAR_NUM)); 1032 if (!hwbase) { 1033 dev_err(pf->dev, "Unable to map PFAF mailbox region\n"); 1034 err = -ENOMEM; 1035 goto exit; 1036 } 1037 1038 err = otx2_mbox_init(&mbox->mbox, hwbase, pf->pdev, pf->reg_base, 1039 MBOX_DIR_PFAF, 1); 1040 if (err) 1041 goto exit; 1042 1043 err = otx2_mbox_init(&mbox->mbox_up, hwbase, pf->pdev, pf->reg_base, 1044 MBOX_DIR_PFAF_UP, 1); 1045 if (err) 1046 goto exit; 1047 1048 err = otx2_mbox_bbuf_init(mbox, pf->pdev); 1049 if (err) 1050 goto exit; 1051 1052 INIT_WORK(&mbox->mbox_wrk, otx2_pfaf_mbox_handler); 1053 INIT_WORK(&mbox->mbox_up_wrk, otx2_pfaf_mbox_up_handler); 1054 mutex_init(&mbox->lock); 1055 1056 return 0; 1057 exit: 1058 otx2_pfaf_mbox_destroy(pf); 1059 return err; 1060 } 1061 1062 static int otx2_cgx_config_linkevents(struct otx2_nic *pf, bool enable) 1063 { 1064 struct msg_req *msg; 1065 int err; 1066 1067 mutex_lock(&pf->mbox.lock); 1068 if (enable) 1069 msg = otx2_mbox_alloc_msg_cgx_start_linkevents(&pf->mbox); 1070 else 1071 msg = otx2_mbox_alloc_msg_cgx_stop_linkevents(&pf->mbox); 1072 1073 if (!msg) { 1074 mutex_unlock(&pf->mbox.lock); 1075 return -ENOMEM; 1076 } 1077 1078 err = otx2_sync_mbox_msg(&pf->mbox); 1079 mutex_unlock(&pf->mbox.lock); 1080 return err; 1081 } 1082 1083 static int otx2_cgx_config_loopback(struct otx2_nic *pf, bool enable) 1084 { 1085 struct msg_req *msg; 1086 int err; 1087 1088 mutex_lock(&pf->mbox.lock); 1089 if (enable) 1090 msg = otx2_mbox_alloc_msg_cgx_intlbk_enable(&pf->mbox); 1091 else 1092 msg = otx2_mbox_alloc_msg_cgx_intlbk_disable(&pf->mbox); 1093 1094 if (!msg) { 1095 mutex_unlock(&pf->mbox.lock); 1096 return -ENOMEM; 1097 } 1098 1099 err = otx2_sync_mbox_msg(&pf->mbox); 1100 mutex_unlock(&pf->mbox.lock); 1101 return err; 1102 } 1103 1104 int otx2_set_real_num_queues(struct net_device *netdev, 1105 int tx_queues, int rx_queues) 1106 { 1107 int err; 1108 1109 err = netif_set_real_num_tx_queues(netdev, tx_queues); 1110 if (err) { 1111 netdev_err(netdev, 1112 "Failed to set no of Tx queues: %d\n", tx_queues); 1113 return err; 1114 } 1115 1116 err = netif_set_real_num_rx_queues(netdev, rx_queues); 1117 if (err) 1118 netdev_err(netdev, 1119 "Failed to set no of Rx queues: %d\n", rx_queues); 1120 return err; 1121 } 1122 EXPORT_SYMBOL(otx2_set_real_num_queues); 1123 1124 static irqreturn_t otx2_q_intr_handler(int irq, void *data) 1125 { 1126 struct otx2_nic *pf = data; 1127 u64 val, *ptr; 1128 u64 qidx = 0; 1129 1130 /* CQ */ 1131 for (qidx = 0; qidx < pf->qset.cq_cnt; qidx++) { 1132 ptr = otx2_get_regaddr(pf, NIX_LF_CQ_OP_INT); 1133 val = otx2_atomic64_add((qidx << 44), ptr); 1134 1135 otx2_write64(pf, NIX_LF_CQ_OP_INT, (qidx << 44) | 1136 (val & NIX_CQERRINT_BITS)); 1137 if (!(val & (NIX_CQERRINT_BITS | BIT_ULL(42)))) 1138 continue; 1139 1140 if (val & BIT_ULL(42)) { 1141 netdev_err(pf->netdev, "CQ%lld: error reading NIX_LF_CQ_OP_INT, NIX_LF_ERR_INT 0x%llx\n", 1142 qidx, otx2_read64(pf, NIX_LF_ERR_INT)); 1143 } else { 1144 if (val & BIT_ULL(NIX_CQERRINT_DOOR_ERR)) 1145 netdev_err(pf->netdev, "CQ%lld: Doorbell error", 1146 qidx); 1147 if (val & BIT_ULL(NIX_CQERRINT_CQE_FAULT)) 1148 netdev_err(pf->netdev, "CQ%lld: Memory fault on CQE write to LLC/DRAM", 1149 qidx); 1150 } 1151 1152 schedule_work(&pf->reset_task); 1153 } 1154 1155 /* SQ */ 1156 for (qidx = 0; qidx < pf->hw.tx_queues; qidx++) { 1157 ptr = otx2_get_regaddr(pf, NIX_LF_SQ_OP_INT); 1158 val = otx2_atomic64_add((qidx << 44), ptr); 1159 otx2_write64(pf, NIX_LF_SQ_OP_INT, (qidx << 44) | 1160 (val & NIX_SQINT_BITS)); 1161 1162 if (!(val & (NIX_SQINT_BITS | BIT_ULL(42)))) 1163 continue; 1164 1165 if (val & BIT_ULL(42)) { 1166 netdev_err(pf->netdev, "SQ%lld: error reading NIX_LF_SQ_OP_INT, NIX_LF_ERR_INT 0x%llx\n", 1167 qidx, otx2_read64(pf, NIX_LF_ERR_INT)); 1168 } else { 1169 if (val & BIT_ULL(NIX_SQINT_LMT_ERR)) { 1170 netdev_err(pf->netdev, "SQ%lld: LMT store error NIX_LF_SQ_OP_ERR_DBG:0x%llx", 1171 qidx, 1172 otx2_read64(pf, 1173 NIX_LF_SQ_OP_ERR_DBG)); 1174 otx2_write64(pf, NIX_LF_SQ_OP_ERR_DBG, 1175 BIT_ULL(44)); 1176 } 1177 if (val & BIT_ULL(NIX_SQINT_MNQ_ERR)) { 1178 netdev_err(pf->netdev, "SQ%lld: Meta-descriptor enqueue error NIX_LF_MNQ_ERR_DGB:0x%llx\n", 1179 qidx, 1180 otx2_read64(pf, NIX_LF_MNQ_ERR_DBG)); 1181 otx2_write64(pf, NIX_LF_MNQ_ERR_DBG, 1182 BIT_ULL(44)); 1183 } 1184 if (val & BIT_ULL(NIX_SQINT_SEND_ERR)) { 1185 netdev_err(pf->netdev, "SQ%lld: Send error, NIX_LF_SEND_ERR_DBG 0x%llx", 1186 qidx, 1187 otx2_read64(pf, 1188 NIX_LF_SEND_ERR_DBG)); 1189 otx2_write64(pf, NIX_LF_SEND_ERR_DBG, 1190 BIT_ULL(44)); 1191 } 1192 if (val & BIT_ULL(NIX_SQINT_SQB_ALLOC_FAIL)) 1193 netdev_err(pf->netdev, "SQ%lld: SQB allocation failed", 1194 qidx); 1195 } 1196 1197 schedule_work(&pf->reset_task); 1198 } 1199 1200 return IRQ_HANDLED; 1201 } 1202 1203 static irqreturn_t otx2_cq_intr_handler(int irq, void *cq_irq) 1204 { 1205 struct otx2_cq_poll *cq_poll = (struct otx2_cq_poll *)cq_irq; 1206 struct otx2_nic *pf = (struct otx2_nic *)cq_poll->dev; 1207 int qidx = cq_poll->cint_idx; 1208 1209 /* Disable interrupts. 1210 * 1211 * Completion interrupts behave in a level-triggered interrupt 1212 * fashion, and hence have to be cleared only after it is serviced. 1213 */ 1214 otx2_write64(pf, NIX_LF_CINTX_ENA_W1C(qidx), BIT_ULL(0)); 1215 1216 /* Schedule NAPI */ 1217 napi_schedule_irqoff(&cq_poll->napi); 1218 1219 return IRQ_HANDLED; 1220 } 1221 1222 static void otx2_disable_napi(struct otx2_nic *pf) 1223 { 1224 struct otx2_qset *qset = &pf->qset; 1225 struct otx2_cq_poll *cq_poll; 1226 int qidx; 1227 1228 for (qidx = 0; qidx < pf->hw.cint_cnt; qidx++) { 1229 cq_poll = &qset->napi[qidx]; 1230 napi_disable(&cq_poll->napi); 1231 netif_napi_del(&cq_poll->napi); 1232 } 1233 } 1234 1235 static void otx2_free_cq_res(struct otx2_nic *pf) 1236 { 1237 struct otx2_qset *qset = &pf->qset; 1238 struct otx2_cq_queue *cq; 1239 int qidx; 1240 1241 /* Disable CQs */ 1242 otx2_ctx_disable(&pf->mbox, NIX_AQ_CTYPE_CQ, false); 1243 for (qidx = 0; qidx < qset->cq_cnt; qidx++) { 1244 cq = &qset->cq[qidx]; 1245 qmem_free(pf->dev, cq->cqe); 1246 } 1247 } 1248 1249 static void otx2_free_sq_res(struct otx2_nic *pf) 1250 { 1251 struct otx2_qset *qset = &pf->qset; 1252 struct otx2_snd_queue *sq; 1253 int qidx; 1254 1255 /* Disable SQs */ 1256 otx2_ctx_disable(&pf->mbox, NIX_AQ_CTYPE_SQ, false); 1257 /* Free SQB pointers */ 1258 otx2_sq_free_sqbs(pf); 1259 for (qidx = 0; qidx < pf->hw.tx_queues; qidx++) { 1260 sq = &qset->sq[qidx]; 1261 qmem_free(pf->dev, sq->sqe); 1262 qmem_free(pf->dev, sq->tso_hdrs); 1263 kfree(sq->sg); 1264 kfree(sq->sqb_ptrs); 1265 } 1266 } 1267 1268 static int otx2_init_hw_resources(struct otx2_nic *pf) 1269 { 1270 struct mbox *mbox = &pf->mbox; 1271 struct otx2_hw *hw = &pf->hw; 1272 struct msg_req *req; 1273 int err = 0, lvl; 1274 1275 /* Set required NPA LF's pool counts 1276 * Auras and Pools are used in a 1:1 mapping, 1277 * so, aura count = pool count. 1278 */ 1279 hw->rqpool_cnt = hw->rx_queues; 1280 hw->sqpool_cnt = hw->tx_queues; 1281 hw->pool_cnt = hw->rqpool_cnt + hw->sqpool_cnt; 1282 1283 /* Get the size of receive buffers to allocate */ 1284 pf->rbsize = RCV_FRAG_LEN(pf->netdev->mtu + OTX2_ETH_HLEN); 1285 1286 mutex_lock(&mbox->lock); 1287 /* NPA init */ 1288 err = otx2_config_npa(pf); 1289 if (err) 1290 goto exit; 1291 1292 /* NIX init */ 1293 err = otx2_config_nix(pf); 1294 if (err) 1295 goto err_free_npa_lf; 1296 1297 /* Enable backpressure */ 1298 otx2_nix_config_bp(pf, true); 1299 1300 /* Init Auras and pools used by NIX RQ, for free buffer ptrs */ 1301 err = otx2_rq_aura_pool_init(pf); 1302 if (err) { 1303 mutex_unlock(&mbox->lock); 1304 goto err_free_nix_lf; 1305 } 1306 /* Init Auras and pools used by NIX SQ, for queueing SQEs */ 1307 err = otx2_sq_aura_pool_init(pf); 1308 if (err) { 1309 mutex_unlock(&mbox->lock); 1310 goto err_free_rq_ptrs; 1311 } 1312 1313 err = otx2_txsch_alloc(pf); 1314 if (err) { 1315 mutex_unlock(&mbox->lock); 1316 goto err_free_sq_ptrs; 1317 } 1318 1319 err = otx2_config_nix_queues(pf); 1320 if (err) { 1321 mutex_unlock(&mbox->lock); 1322 goto err_free_txsch; 1323 } 1324 for (lvl = 0; lvl < NIX_TXSCH_LVL_CNT; lvl++) { 1325 err = otx2_txschq_config(pf, lvl); 1326 if (err) { 1327 mutex_unlock(&mbox->lock); 1328 goto err_free_nix_queues; 1329 } 1330 } 1331 mutex_unlock(&mbox->lock); 1332 return err; 1333 1334 err_free_nix_queues: 1335 otx2_free_sq_res(pf); 1336 otx2_free_cq_res(pf); 1337 otx2_ctx_disable(mbox, NIX_AQ_CTYPE_RQ, false); 1338 err_free_txsch: 1339 if (otx2_txschq_stop(pf)) 1340 dev_err(pf->dev, "%s failed to stop TX schedulers\n", __func__); 1341 err_free_sq_ptrs: 1342 otx2_sq_free_sqbs(pf); 1343 err_free_rq_ptrs: 1344 otx2_free_aura_ptr(pf, AURA_NIX_RQ); 1345 otx2_ctx_disable(mbox, NPA_AQ_CTYPE_POOL, true); 1346 otx2_ctx_disable(mbox, NPA_AQ_CTYPE_AURA, true); 1347 otx2_aura_pool_free(pf); 1348 err_free_nix_lf: 1349 mutex_lock(&mbox->lock); 1350 req = otx2_mbox_alloc_msg_nix_lf_free(mbox); 1351 if (req) { 1352 if (otx2_sync_mbox_msg(mbox)) 1353 dev_err(pf->dev, "%s failed to free nixlf\n", __func__); 1354 } 1355 err_free_npa_lf: 1356 /* Reset NPA LF */ 1357 req = otx2_mbox_alloc_msg_npa_lf_free(mbox); 1358 if (req) { 1359 if (otx2_sync_mbox_msg(mbox)) 1360 dev_err(pf->dev, "%s failed to free npalf\n", __func__); 1361 } 1362 exit: 1363 mutex_unlock(&mbox->lock); 1364 return err; 1365 } 1366 1367 static void otx2_free_hw_resources(struct otx2_nic *pf) 1368 { 1369 struct otx2_qset *qset = &pf->qset; 1370 struct mbox *mbox = &pf->mbox; 1371 struct otx2_cq_queue *cq; 1372 struct msg_req *req; 1373 int qidx, err; 1374 1375 /* Ensure all SQE are processed */ 1376 otx2_sqb_flush(pf); 1377 1378 /* Stop transmission */ 1379 err = otx2_txschq_stop(pf); 1380 if (err) 1381 dev_err(pf->dev, "RVUPF: Failed to stop/free TX schedulers\n"); 1382 1383 mutex_lock(&mbox->lock); 1384 /* Disable backpressure */ 1385 if (!(pf->pcifunc & RVU_PFVF_FUNC_MASK)) 1386 otx2_nix_config_bp(pf, false); 1387 mutex_unlock(&mbox->lock); 1388 1389 /* Disable RQs */ 1390 otx2_ctx_disable(mbox, NIX_AQ_CTYPE_RQ, false); 1391 1392 /*Dequeue all CQEs */ 1393 for (qidx = 0; qidx < qset->cq_cnt; qidx++) { 1394 cq = &qset->cq[qidx]; 1395 if (cq->cq_type == CQ_RX) 1396 otx2_cleanup_rx_cqes(pf, cq); 1397 else 1398 otx2_cleanup_tx_cqes(pf, cq); 1399 } 1400 1401 otx2_free_sq_res(pf); 1402 1403 /* Free RQ buffer pointers*/ 1404 otx2_free_aura_ptr(pf, AURA_NIX_RQ); 1405 1406 otx2_free_cq_res(pf); 1407 1408 mutex_lock(&mbox->lock); 1409 /* Reset NIX LF */ 1410 req = otx2_mbox_alloc_msg_nix_lf_free(mbox); 1411 if (req) { 1412 if (otx2_sync_mbox_msg(mbox)) 1413 dev_err(pf->dev, "%s failed to free nixlf\n", __func__); 1414 } 1415 mutex_unlock(&mbox->lock); 1416 1417 /* Disable NPA Pool and Aura hw context */ 1418 otx2_ctx_disable(mbox, NPA_AQ_CTYPE_POOL, true); 1419 otx2_ctx_disable(mbox, NPA_AQ_CTYPE_AURA, true); 1420 otx2_aura_pool_free(pf); 1421 1422 mutex_lock(&mbox->lock); 1423 /* Reset NPA LF */ 1424 req = otx2_mbox_alloc_msg_npa_lf_free(mbox); 1425 if (req) { 1426 if (otx2_sync_mbox_msg(mbox)) 1427 dev_err(pf->dev, "%s failed to free npalf\n", __func__); 1428 } 1429 mutex_unlock(&mbox->lock); 1430 } 1431 1432 int otx2_open(struct net_device *netdev) 1433 { 1434 struct otx2_nic *pf = netdev_priv(netdev); 1435 struct otx2_cq_poll *cq_poll = NULL; 1436 struct otx2_qset *qset = &pf->qset; 1437 int err = 0, qidx, vec; 1438 char *irq_name; 1439 1440 netif_carrier_off(netdev); 1441 1442 pf->qset.cq_cnt = pf->hw.rx_queues + pf->hw.tx_queues; 1443 /* RQ and SQs are mapped to different CQs, 1444 * so find out max CQ IRQs (i.e CINTs) needed. 1445 */ 1446 pf->hw.cint_cnt = max(pf->hw.rx_queues, pf->hw.tx_queues); 1447 qset->napi = kcalloc(pf->hw.cint_cnt, sizeof(*cq_poll), GFP_KERNEL); 1448 if (!qset->napi) 1449 return -ENOMEM; 1450 1451 /* CQ size of RQ */ 1452 qset->rqe_cnt = qset->rqe_cnt ? qset->rqe_cnt : Q_COUNT(Q_SIZE_256); 1453 /* CQ size of SQ */ 1454 qset->sqe_cnt = qset->sqe_cnt ? qset->sqe_cnt : Q_COUNT(Q_SIZE_4K); 1455 1456 err = -ENOMEM; 1457 qset->cq = kcalloc(pf->qset.cq_cnt, 1458 sizeof(struct otx2_cq_queue), GFP_KERNEL); 1459 if (!qset->cq) 1460 goto err_free_mem; 1461 1462 qset->sq = kcalloc(pf->hw.tx_queues, 1463 sizeof(struct otx2_snd_queue), GFP_KERNEL); 1464 if (!qset->sq) 1465 goto err_free_mem; 1466 1467 qset->rq = kcalloc(pf->hw.rx_queues, 1468 sizeof(struct otx2_rcv_queue), GFP_KERNEL); 1469 if (!qset->rq) 1470 goto err_free_mem; 1471 1472 err = otx2_init_hw_resources(pf); 1473 if (err) 1474 goto err_free_mem; 1475 1476 /* Register NAPI handler */ 1477 for (qidx = 0; qidx < pf->hw.cint_cnt; qidx++) { 1478 cq_poll = &qset->napi[qidx]; 1479 cq_poll->cint_idx = qidx; 1480 /* RQ0 & SQ0 are mapped to CINT0 and so on.. 1481 * 'cq_ids[0]' points to RQ's CQ and 1482 * 'cq_ids[1]' points to SQ's CQ and 1483 */ 1484 cq_poll->cq_ids[CQ_RX] = 1485 (qidx < pf->hw.rx_queues) ? qidx : CINT_INVALID_CQ; 1486 cq_poll->cq_ids[CQ_TX] = (qidx < pf->hw.tx_queues) ? 1487 qidx + pf->hw.rx_queues : CINT_INVALID_CQ; 1488 cq_poll->dev = (void *)pf; 1489 netif_napi_add(netdev, &cq_poll->napi, 1490 otx2_napi_handler, NAPI_POLL_WEIGHT); 1491 napi_enable(&cq_poll->napi); 1492 } 1493 1494 /* Set maximum frame size allowed in HW */ 1495 err = otx2_hw_set_mtu(pf, netdev->mtu); 1496 if (err) 1497 goto err_disable_napi; 1498 1499 /* Initialize RSS */ 1500 err = otx2_rss_init(pf); 1501 if (err) 1502 goto err_disable_napi; 1503 1504 /* Register Queue IRQ handlers */ 1505 vec = pf->hw.nix_msixoff + NIX_LF_QINT_VEC_START; 1506 irq_name = &pf->hw.irq_name[vec * NAME_SIZE]; 1507 1508 snprintf(irq_name, NAME_SIZE, "%s-qerr", pf->netdev->name); 1509 1510 err = request_irq(pci_irq_vector(pf->pdev, vec), 1511 otx2_q_intr_handler, 0, irq_name, pf); 1512 if (err) { 1513 dev_err(pf->dev, 1514 "RVUPF%d: IRQ registration failed for QERR\n", 1515 rvu_get_pf(pf->pcifunc)); 1516 goto err_disable_napi; 1517 } 1518 1519 /* Enable QINT IRQ */ 1520 otx2_write64(pf, NIX_LF_QINTX_ENA_W1S(0), BIT_ULL(0)); 1521 1522 /* Register CQ IRQ handlers */ 1523 vec = pf->hw.nix_msixoff + NIX_LF_CINT_VEC_START; 1524 for (qidx = 0; qidx < pf->hw.cint_cnt; qidx++) { 1525 irq_name = &pf->hw.irq_name[vec * NAME_SIZE]; 1526 1527 snprintf(irq_name, NAME_SIZE, "%s-rxtx-%d", pf->netdev->name, 1528 qidx); 1529 1530 err = request_irq(pci_irq_vector(pf->pdev, vec), 1531 otx2_cq_intr_handler, 0, irq_name, 1532 &qset->napi[qidx]); 1533 if (err) { 1534 dev_err(pf->dev, 1535 "RVUPF%d: IRQ registration failed for CQ%d\n", 1536 rvu_get_pf(pf->pcifunc), qidx); 1537 goto err_free_cints; 1538 } 1539 vec++; 1540 1541 otx2_config_irq_coalescing(pf, qidx); 1542 1543 /* Enable CQ IRQ */ 1544 otx2_write64(pf, NIX_LF_CINTX_INT(qidx), BIT_ULL(0)); 1545 otx2_write64(pf, NIX_LF_CINTX_ENA_W1S(qidx), BIT_ULL(0)); 1546 } 1547 1548 otx2_set_cints_affinity(pf); 1549 1550 pf->flags &= ~OTX2_FLAG_INTF_DOWN; 1551 /* 'intf_down' may be checked on any cpu */ 1552 smp_wmb(); 1553 1554 /* we have already received link status notification */ 1555 if (pf->linfo.link_up && !(pf->pcifunc & RVU_PFVF_FUNC_MASK)) 1556 otx2_handle_link_event(pf); 1557 1558 /* Restore pause frame settings */ 1559 otx2_config_pause_frm(pf); 1560 1561 err = otx2_rxtx_enable(pf, true); 1562 if (err) 1563 goto err_free_cints; 1564 1565 return 0; 1566 1567 err_free_cints: 1568 otx2_free_cints(pf, qidx); 1569 vec = pci_irq_vector(pf->pdev, 1570 pf->hw.nix_msixoff + NIX_LF_QINT_VEC_START); 1571 otx2_write64(pf, NIX_LF_QINTX_ENA_W1C(0), BIT_ULL(0)); 1572 synchronize_irq(vec); 1573 free_irq(vec, pf); 1574 err_disable_napi: 1575 otx2_disable_napi(pf); 1576 otx2_free_hw_resources(pf); 1577 err_free_mem: 1578 kfree(qset->sq); 1579 kfree(qset->cq); 1580 kfree(qset->rq); 1581 kfree(qset->napi); 1582 return err; 1583 } 1584 EXPORT_SYMBOL(otx2_open); 1585 1586 int otx2_stop(struct net_device *netdev) 1587 { 1588 struct otx2_nic *pf = netdev_priv(netdev); 1589 struct otx2_cq_poll *cq_poll = NULL; 1590 struct otx2_qset *qset = &pf->qset; 1591 int qidx, vec, wrk; 1592 1593 netif_carrier_off(netdev); 1594 netif_tx_stop_all_queues(netdev); 1595 1596 pf->flags |= OTX2_FLAG_INTF_DOWN; 1597 /* 'intf_down' may be checked on any cpu */ 1598 smp_wmb(); 1599 1600 /* First stop packet Rx/Tx */ 1601 otx2_rxtx_enable(pf, false); 1602 1603 /* Cleanup Queue IRQ */ 1604 vec = pci_irq_vector(pf->pdev, 1605 pf->hw.nix_msixoff + NIX_LF_QINT_VEC_START); 1606 otx2_write64(pf, NIX_LF_QINTX_ENA_W1C(0), BIT_ULL(0)); 1607 synchronize_irq(vec); 1608 free_irq(vec, pf); 1609 1610 /* Cleanup CQ NAPI and IRQ */ 1611 vec = pf->hw.nix_msixoff + NIX_LF_CINT_VEC_START; 1612 for (qidx = 0; qidx < pf->hw.cint_cnt; qidx++) { 1613 /* Disable interrupt */ 1614 otx2_write64(pf, NIX_LF_CINTX_ENA_W1C(qidx), BIT_ULL(0)); 1615 1616 synchronize_irq(pci_irq_vector(pf->pdev, vec)); 1617 1618 cq_poll = &qset->napi[qidx]; 1619 napi_synchronize(&cq_poll->napi); 1620 vec++; 1621 } 1622 1623 netif_tx_disable(netdev); 1624 1625 otx2_free_hw_resources(pf); 1626 otx2_free_cints(pf, pf->hw.cint_cnt); 1627 otx2_disable_napi(pf); 1628 1629 for (qidx = 0; qidx < netdev->num_tx_queues; qidx++) 1630 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, qidx)); 1631 1632 for (wrk = 0; wrk < pf->qset.cq_cnt; wrk++) 1633 cancel_delayed_work_sync(&pf->refill_wrk[wrk].pool_refill_work); 1634 devm_kfree(pf->dev, pf->refill_wrk); 1635 1636 kfree(qset->sq); 1637 kfree(qset->cq); 1638 kfree(qset->rq); 1639 kfree(qset->napi); 1640 /* Do not clear RQ/SQ ringsize settings */ 1641 memset((void *)qset + offsetof(struct otx2_qset, sqe_cnt), 0, 1642 sizeof(*qset) - offsetof(struct otx2_qset, sqe_cnt)); 1643 return 0; 1644 } 1645 EXPORT_SYMBOL(otx2_stop); 1646 1647 static netdev_tx_t otx2_xmit(struct sk_buff *skb, struct net_device *netdev) 1648 { 1649 struct otx2_nic *pf = netdev_priv(netdev); 1650 int qidx = skb_get_queue_mapping(skb); 1651 struct otx2_snd_queue *sq; 1652 struct netdev_queue *txq; 1653 1654 /* Check for minimum and maximum packet length */ 1655 if (skb->len <= ETH_HLEN || 1656 (!skb_shinfo(skb)->gso_size && skb->len > pf->max_frs)) { 1657 dev_kfree_skb(skb); 1658 return NETDEV_TX_OK; 1659 } 1660 1661 sq = &pf->qset.sq[qidx]; 1662 txq = netdev_get_tx_queue(netdev, qidx); 1663 1664 if (!otx2_sq_append_skb(netdev, sq, skb, qidx)) { 1665 netif_tx_stop_queue(txq); 1666 1667 /* Check again, incase SQBs got freed up */ 1668 smp_mb(); 1669 if (((sq->num_sqbs - *sq->aura_fc_addr) * sq->sqe_per_sqb) 1670 > sq->sqe_thresh) 1671 netif_tx_wake_queue(txq); 1672 1673 return NETDEV_TX_BUSY; 1674 } 1675 1676 return NETDEV_TX_OK; 1677 } 1678 1679 static void otx2_set_rx_mode(struct net_device *netdev) 1680 { 1681 struct otx2_nic *pf = netdev_priv(netdev); 1682 1683 queue_work(pf->otx2_wq, &pf->rx_mode_work); 1684 } 1685 1686 static void otx2_do_set_rx_mode(struct work_struct *work) 1687 { 1688 struct otx2_nic *pf = container_of(work, struct otx2_nic, rx_mode_work); 1689 struct net_device *netdev = pf->netdev; 1690 struct nix_rx_mode *req; 1691 1692 if (!(netdev->flags & IFF_UP)) 1693 return; 1694 1695 mutex_lock(&pf->mbox.lock); 1696 req = otx2_mbox_alloc_msg_nix_set_rx_mode(&pf->mbox); 1697 if (!req) { 1698 mutex_unlock(&pf->mbox.lock); 1699 return; 1700 } 1701 1702 req->mode = NIX_RX_MODE_UCAST; 1703 1704 /* We don't support MAC address filtering yet */ 1705 if (netdev->flags & IFF_PROMISC) 1706 req->mode |= NIX_RX_MODE_PROMISC; 1707 else if (netdev->flags & (IFF_ALLMULTI | IFF_MULTICAST)) 1708 req->mode |= NIX_RX_MODE_ALLMULTI; 1709 1710 otx2_sync_mbox_msg(&pf->mbox); 1711 mutex_unlock(&pf->mbox.lock); 1712 } 1713 1714 static int otx2_set_features(struct net_device *netdev, 1715 netdev_features_t features) 1716 { 1717 netdev_features_t changed = features ^ netdev->features; 1718 struct otx2_nic *pf = netdev_priv(netdev); 1719 1720 if ((changed & NETIF_F_LOOPBACK) && netif_running(netdev)) 1721 return otx2_cgx_config_loopback(pf, 1722 features & NETIF_F_LOOPBACK); 1723 return 0; 1724 } 1725 1726 static void otx2_reset_task(struct work_struct *work) 1727 { 1728 struct otx2_nic *pf = container_of(work, struct otx2_nic, reset_task); 1729 1730 if (!netif_running(pf->netdev)) 1731 return; 1732 1733 rtnl_lock(); 1734 otx2_stop(pf->netdev); 1735 pf->reset_count++; 1736 otx2_open(pf->netdev); 1737 netif_trans_update(pf->netdev); 1738 rtnl_unlock(); 1739 } 1740 1741 static const struct net_device_ops otx2_netdev_ops = { 1742 .ndo_open = otx2_open, 1743 .ndo_stop = otx2_stop, 1744 .ndo_start_xmit = otx2_xmit, 1745 .ndo_set_mac_address = otx2_set_mac_address, 1746 .ndo_change_mtu = otx2_change_mtu, 1747 .ndo_set_rx_mode = otx2_set_rx_mode, 1748 .ndo_set_features = otx2_set_features, 1749 .ndo_tx_timeout = otx2_tx_timeout, 1750 .ndo_get_stats64 = otx2_get_stats64, 1751 }; 1752 1753 static int otx2_wq_init(struct otx2_nic *pf) 1754 { 1755 pf->otx2_wq = create_singlethread_workqueue("otx2_wq"); 1756 if (!pf->otx2_wq) 1757 return -ENOMEM; 1758 1759 INIT_WORK(&pf->rx_mode_work, otx2_do_set_rx_mode); 1760 INIT_WORK(&pf->reset_task, otx2_reset_task); 1761 return 0; 1762 } 1763 1764 static int otx2_check_pf_usable(struct otx2_nic *nic) 1765 { 1766 u64 rev; 1767 1768 rev = otx2_read64(nic, RVU_PF_BLOCK_ADDRX_DISC(BLKADDR_RVUM)); 1769 rev = (rev >> 12) & 0xFF; 1770 /* Check if AF has setup revision for RVUM block, 1771 * otherwise this driver probe should be deferred 1772 * until AF driver comes up. 1773 */ 1774 if (!rev) { 1775 dev_warn(nic->dev, 1776 "AF is not initialized, deferring probe\n"); 1777 return -EPROBE_DEFER; 1778 } 1779 return 0; 1780 } 1781 1782 static int otx2_realloc_msix_vectors(struct otx2_nic *pf) 1783 { 1784 struct otx2_hw *hw = &pf->hw; 1785 int num_vec, err; 1786 1787 /* NPA interrupts are inot registered, so alloc only 1788 * upto NIX vector offset. 1789 */ 1790 num_vec = hw->nix_msixoff; 1791 num_vec += NIX_LF_CINT_VEC_START + hw->max_queues; 1792 1793 otx2_disable_mbox_intr(pf); 1794 pci_free_irq_vectors(hw->pdev); 1795 err = pci_alloc_irq_vectors(hw->pdev, num_vec, num_vec, PCI_IRQ_MSIX); 1796 if (err < 0) { 1797 dev_err(pf->dev, "%s: Failed to realloc %d IRQ vectors\n", 1798 __func__, num_vec); 1799 return err; 1800 } 1801 1802 return otx2_register_mbox_intr(pf, false); 1803 } 1804 1805 static int otx2_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1806 { 1807 struct device *dev = &pdev->dev; 1808 struct net_device *netdev; 1809 struct otx2_nic *pf; 1810 struct otx2_hw *hw; 1811 int err, qcount; 1812 int num_vec; 1813 1814 err = pcim_enable_device(pdev); 1815 if (err) { 1816 dev_err(dev, "Failed to enable PCI device\n"); 1817 return err; 1818 } 1819 1820 err = pci_request_regions(pdev, DRV_NAME); 1821 if (err) { 1822 dev_err(dev, "PCI request regions failed 0x%x\n", err); 1823 return err; 1824 } 1825 1826 err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)); 1827 if (err) { 1828 dev_err(dev, "DMA mask config failed, abort\n"); 1829 goto err_release_regions; 1830 } 1831 1832 pci_set_master(pdev); 1833 1834 /* Set number of queues */ 1835 qcount = min_t(int, num_online_cpus(), OTX2_MAX_CQ_CNT); 1836 1837 netdev = alloc_etherdev_mqs(sizeof(*pf), qcount, qcount); 1838 if (!netdev) { 1839 err = -ENOMEM; 1840 goto err_release_regions; 1841 } 1842 1843 pci_set_drvdata(pdev, netdev); 1844 SET_NETDEV_DEV(netdev, &pdev->dev); 1845 pf = netdev_priv(netdev); 1846 pf->netdev = netdev; 1847 pf->pdev = pdev; 1848 pf->dev = dev; 1849 pf->total_vfs = pci_sriov_get_totalvfs(pdev); 1850 pf->flags |= OTX2_FLAG_INTF_DOWN; 1851 1852 hw = &pf->hw; 1853 hw->pdev = pdev; 1854 hw->rx_queues = qcount; 1855 hw->tx_queues = qcount; 1856 hw->max_queues = qcount; 1857 1858 num_vec = pci_msix_vec_count(pdev); 1859 hw->irq_name = devm_kmalloc_array(&hw->pdev->dev, num_vec, NAME_SIZE, 1860 GFP_KERNEL); 1861 if (!hw->irq_name) { 1862 err = -ENOMEM; 1863 goto err_free_netdev; 1864 } 1865 1866 hw->affinity_mask = devm_kcalloc(&hw->pdev->dev, num_vec, 1867 sizeof(cpumask_var_t), GFP_KERNEL); 1868 if (!hw->affinity_mask) { 1869 err = -ENOMEM; 1870 goto err_free_netdev; 1871 } 1872 1873 /* Map CSRs */ 1874 pf->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); 1875 if (!pf->reg_base) { 1876 dev_err(dev, "Unable to map physical function CSRs, aborting\n"); 1877 err = -ENOMEM; 1878 goto err_free_netdev; 1879 } 1880 1881 err = otx2_check_pf_usable(pf); 1882 if (err) 1883 goto err_free_netdev; 1884 1885 err = pci_alloc_irq_vectors(hw->pdev, RVU_PF_INT_VEC_CNT, 1886 RVU_PF_INT_VEC_CNT, PCI_IRQ_MSIX); 1887 if (err < 0) { 1888 dev_err(dev, "%s: Failed to alloc %d IRQ vectors\n", 1889 __func__, num_vec); 1890 goto err_free_netdev; 1891 } 1892 1893 /* Init PF <=> AF mailbox stuff */ 1894 err = otx2_pfaf_mbox_init(pf); 1895 if (err) 1896 goto err_free_irq_vectors; 1897 1898 /* Register mailbox interrupt */ 1899 err = otx2_register_mbox_intr(pf, true); 1900 if (err) 1901 goto err_mbox_destroy; 1902 1903 /* Request AF to attach NPA and NIX LFs to this PF. 1904 * NIX and NPA LFs are needed for this PF to function as a NIC. 1905 */ 1906 err = otx2_attach_npa_nix(pf); 1907 if (err) 1908 goto err_disable_mbox_intr; 1909 1910 err = otx2_realloc_msix_vectors(pf); 1911 if (err) 1912 goto err_detach_rsrc; 1913 1914 err = otx2_set_real_num_queues(netdev, hw->tx_queues, hw->rx_queues); 1915 if (err) 1916 goto err_detach_rsrc; 1917 1918 otx2_setup_dev_hw_settings(pf); 1919 1920 /* Assign default mac address */ 1921 otx2_get_mac_from_af(netdev); 1922 1923 /* NPA's pool is a stack to which SW frees buffer pointers via Aura. 1924 * HW allocates buffer pointer from stack and uses it for DMA'ing 1925 * ingress packet. In some scenarios HW can free back allocated buffer 1926 * pointers to pool. This makes it impossible for SW to maintain a 1927 * parallel list where physical addresses of buffer pointers (IOVAs) 1928 * given to HW can be saved for later reference. 1929 * 1930 * So the only way to convert Rx packet's buffer address is to use 1931 * IOMMU's iova_to_phys() handler which translates the address by 1932 * walking through the translation tables. 1933 */ 1934 pf->iommu_domain = iommu_get_domain_for_dev(dev); 1935 1936 netdev->hw_features = (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | 1937 NETIF_F_IPV6_CSUM | NETIF_F_RXHASH | 1938 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6); 1939 netdev->features |= netdev->hw_features; 1940 1941 netdev->hw_features |= NETIF_F_LOOPBACK | NETIF_F_RXALL; 1942 1943 netdev->gso_max_segs = OTX2_MAX_GSO_SEGS; 1944 netdev->watchdog_timeo = OTX2_TX_TIMEOUT; 1945 1946 netdev->netdev_ops = &otx2_netdev_ops; 1947 1948 /* MTU range: 64 - 9190 */ 1949 netdev->min_mtu = OTX2_MIN_MTU; 1950 netdev->max_mtu = OTX2_MAX_MTU; 1951 1952 err = register_netdev(netdev); 1953 if (err) { 1954 dev_err(dev, "Failed to register netdevice\n"); 1955 goto err_detach_rsrc; 1956 } 1957 1958 err = otx2_wq_init(pf); 1959 if (err) 1960 goto err_unreg_netdev; 1961 1962 otx2_set_ethtool_ops(netdev); 1963 1964 /* Enable link notifications */ 1965 otx2_cgx_config_linkevents(pf, true); 1966 1967 /* Enable pause frames by default */ 1968 pf->flags |= OTX2_FLAG_RX_PAUSE_ENABLED; 1969 pf->flags |= OTX2_FLAG_TX_PAUSE_ENABLED; 1970 1971 return 0; 1972 1973 err_unreg_netdev: 1974 unregister_netdev(netdev); 1975 err_detach_rsrc: 1976 otx2_detach_resources(&pf->mbox); 1977 err_disable_mbox_intr: 1978 otx2_disable_mbox_intr(pf); 1979 err_mbox_destroy: 1980 otx2_pfaf_mbox_destroy(pf); 1981 err_free_irq_vectors: 1982 pci_free_irq_vectors(hw->pdev); 1983 err_free_netdev: 1984 pci_set_drvdata(pdev, NULL); 1985 free_netdev(netdev); 1986 err_release_regions: 1987 pci_release_regions(pdev); 1988 return err; 1989 } 1990 1991 static void otx2_vf_link_event_task(struct work_struct *work) 1992 { 1993 struct otx2_vf_config *config; 1994 struct cgx_link_info_msg *req; 1995 struct mbox_msghdr *msghdr; 1996 struct otx2_nic *pf; 1997 int vf_idx; 1998 1999 config = container_of(work, struct otx2_vf_config, 2000 link_event_work.work); 2001 vf_idx = config - config->pf->vf_configs; 2002 pf = config->pf; 2003 2004 msghdr = otx2_mbox_alloc_msg_rsp(&pf->mbox_pfvf[0].mbox_up, vf_idx, 2005 sizeof(*req), sizeof(struct msg_rsp)); 2006 if (!msghdr) { 2007 dev_err(pf->dev, "Failed to create VF%d link event\n", vf_idx); 2008 return; 2009 } 2010 2011 req = (struct cgx_link_info_msg *)msghdr; 2012 req->hdr.id = MBOX_MSG_CGX_LINK_EVENT; 2013 req->hdr.sig = OTX2_MBOX_REQ_SIG; 2014 memcpy(&req->link_info, &pf->linfo, sizeof(req->link_info)); 2015 2016 otx2_sync_mbox_up_msg(&pf->mbox_pfvf[0], vf_idx); 2017 } 2018 2019 static int otx2_sriov_enable(struct pci_dev *pdev, int numvfs) 2020 { 2021 struct net_device *netdev = pci_get_drvdata(pdev); 2022 struct otx2_nic *pf = netdev_priv(netdev); 2023 int ret, i; 2024 2025 /* Init PF <=> VF mailbox stuff */ 2026 ret = otx2_pfvf_mbox_init(pf, numvfs); 2027 if (ret) 2028 return ret; 2029 2030 ret = otx2_register_pfvf_mbox_intr(pf, numvfs); 2031 if (ret) 2032 goto free_mbox; 2033 2034 pf->vf_configs = kcalloc(numvfs, sizeof(struct otx2_vf_config), 2035 GFP_KERNEL); 2036 if (!pf->vf_configs) { 2037 ret = -ENOMEM; 2038 goto free_intr; 2039 } 2040 2041 for (i = 0; i < numvfs; i++) { 2042 pf->vf_configs[i].pf = pf; 2043 pf->vf_configs[i].intf_down = true; 2044 INIT_DELAYED_WORK(&pf->vf_configs[i].link_event_work, 2045 otx2_vf_link_event_task); 2046 } 2047 2048 ret = otx2_pf_flr_init(pf, numvfs); 2049 if (ret) 2050 goto free_configs; 2051 2052 ret = otx2_register_flr_me_intr(pf, numvfs); 2053 if (ret) 2054 goto free_flr; 2055 2056 ret = pci_enable_sriov(pdev, numvfs); 2057 if (ret) 2058 goto free_flr_intr; 2059 2060 return numvfs; 2061 free_flr_intr: 2062 otx2_disable_flr_me_intr(pf); 2063 free_flr: 2064 otx2_flr_wq_destroy(pf); 2065 free_configs: 2066 kfree(pf->vf_configs); 2067 free_intr: 2068 otx2_disable_pfvf_mbox_intr(pf, numvfs); 2069 free_mbox: 2070 otx2_pfvf_mbox_destroy(pf); 2071 return ret; 2072 } 2073 2074 static int otx2_sriov_disable(struct pci_dev *pdev) 2075 { 2076 struct net_device *netdev = pci_get_drvdata(pdev); 2077 struct otx2_nic *pf = netdev_priv(netdev); 2078 int numvfs = pci_num_vf(pdev); 2079 int i; 2080 2081 if (!numvfs) 2082 return 0; 2083 2084 pci_disable_sriov(pdev); 2085 2086 for (i = 0; i < pci_num_vf(pdev); i++) 2087 cancel_delayed_work_sync(&pf->vf_configs[i].link_event_work); 2088 kfree(pf->vf_configs); 2089 2090 otx2_disable_flr_me_intr(pf); 2091 otx2_flr_wq_destroy(pf); 2092 otx2_disable_pfvf_mbox_intr(pf, numvfs); 2093 otx2_pfvf_mbox_destroy(pf); 2094 2095 return 0; 2096 } 2097 2098 static int otx2_sriov_configure(struct pci_dev *pdev, int numvfs) 2099 { 2100 if (numvfs == 0) 2101 return otx2_sriov_disable(pdev); 2102 else 2103 return otx2_sriov_enable(pdev, numvfs); 2104 } 2105 2106 static void otx2_remove(struct pci_dev *pdev) 2107 { 2108 struct net_device *netdev = pci_get_drvdata(pdev); 2109 struct otx2_nic *pf; 2110 2111 if (!netdev) 2112 return; 2113 2114 pf = netdev_priv(netdev); 2115 2116 cancel_work_sync(&pf->reset_task); 2117 /* Disable link notifications */ 2118 otx2_cgx_config_linkevents(pf, false); 2119 2120 unregister_netdev(netdev); 2121 otx2_sriov_disable(pf->pdev); 2122 if (pf->otx2_wq) 2123 destroy_workqueue(pf->otx2_wq); 2124 2125 otx2_detach_resources(&pf->mbox); 2126 otx2_disable_mbox_intr(pf); 2127 otx2_pfaf_mbox_destroy(pf); 2128 pci_free_irq_vectors(pf->pdev); 2129 pci_set_drvdata(pdev, NULL); 2130 free_netdev(netdev); 2131 2132 pci_release_regions(pdev); 2133 } 2134 2135 static struct pci_driver otx2_pf_driver = { 2136 .name = DRV_NAME, 2137 .id_table = otx2_pf_id_table, 2138 .probe = otx2_probe, 2139 .shutdown = otx2_remove, 2140 .remove = otx2_remove, 2141 .sriov_configure = otx2_sriov_configure 2142 }; 2143 2144 static int __init otx2_rvupf_init_module(void) 2145 { 2146 pr_info("%s: %s\n", DRV_NAME, DRV_STRING); 2147 2148 return pci_register_driver(&otx2_pf_driver); 2149 } 2150 2151 static void __exit otx2_rvupf_cleanup_module(void) 2152 { 2153 pci_unregister_driver(&otx2_pf_driver); 2154 } 2155 2156 module_init(otx2_rvupf_init_module); 2157 module_exit(otx2_rvupf_cleanup_module); 2158