1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* Applied Micro X-Gene SoC Ethernet Driver 3 * 4 * Copyright (c) 2014, Applied Micro Circuits Corporation 5 * Authors: Iyappan Subramanian <isubramanian@apm.com> 6 * Ravi Patel <rapatel@apm.com> 7 * Keyur Chudgar <kchudgar@apm.com> 8 */ 9 10 #include <linux/gpio.h> 11 #include "xgene_enet_main.h" 12 #include "xgene_enet_hw.h" 13 #include "xgene_enet_sgmac.h" 14 #include "xgene_enet_xgmac.h" 15 16 #define RES_ENET_CSR 0 17 #define RES_RING_CSR 1 18 #define RES_RING_CMD 2 19 20 static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool) 21 { 22 struct xgene_enet_raw_desc16 *raw_desc; 23 int i; 24 25 if (!buf_pool) 26 return; 27 28 for (i = 0; i < buf_pool->slots; i++) { 29 raw_desc = &buf_pool->raw_desc16[i]; 30 31 /* Hardware expects descriptor in little endian format */ 32 raw_desc->m0 = cpu_to_le64(i | 33 SET_VAL(FPQNUM, buf_pool->dst_ring_num) | 34 SET_VAL(STASH, 3)); 35 } 36 } 37 38 static u16 xgene_enet_get_data_len(u64 bufdatalen) 39 { 40 u16 hw_len, mask; 41 42 hw_len = GET_VAL(BUFDATALEN, bufdatalen); 43 44 if (unlikely(hw_len == 0x7800)) { 45 return 0; 46 } else if (!(hw_len & BIT(14))) { 47 mask = GENMASK(13, 0); 48 return (hw_len & mask) ? (hw_len & mask) : SIZE_16K; 49 } else if (!(hw_len & GENMASK(13, 12))) { 50 mask = GENMASK(11, 0); 51 return (hw_len & mask) ? (hw_len & mask) : SIZE_4K; 52 } else { 53 mask = GENMASK(11, 0); 54 return (hw_len & mask) ? (hw_len & mask) : SIZE_2K; 55 } 56 } 57 58 static u16 xgene_enet_set_data_len(u32 size) 59 { 60 u16 hw_len; 61 62 hw_len = (size == SIZE_4K) ? BIT(14) : 0; 63 64 return hw_len; 65 } 66 67 static int xgene_enet_refill_pagepool(struct xgene_enet_desc_ring *buf_pool, 68 u32 nbuf) 69 { 70 struct xgene_enet_raw_desc16 *raw_desc; 71 struct xgene_enet_pdata *pdata; 72 struct net_device *ndev; 73 dma_addr_t dma_addr; 74 struct device *dev; 75 struct page *page; 76 u32 slots, tail; 77 u16 hw_len; 78 int i; 79 80 if (unlikely(!buf_pool)) 81 return 0; 82 83 ndev = buf_pool->ndev; 84 pdata = netdev_priv(ndev); 85 dev = ndev_to_dev(ndev); 86 slots = buf_pool->slots - 1; 87 tail = buf_pool->tail; 88 89 for (i = 0; i < nbuf; i++) { 90 raw_desc = &buf_pool->raw_desc16[tail]; 91 92 page = dev_alloc_page(); 93 if (unlikely(!page)) 94 return -ENOMEM; 95 96 dma_addr = dma_map_page(dev, page, 0, 97 PAGE_SIZE, DMA_FROM_DEVICE); 98 if (unlikely(dma_mapping_error(dev, dma_addr))) { 99 put_page(page); 100 return -ENOMEM; 101 } 102 103 hw_len = xgene_enet_set_data_len(PAGE_SIZE); 104 raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | 105 SET_VAL(BUFDATALEN, hw_len) | 106 SET_BIT(COHERENT)); 107 108 buf_pool->frag_page[tail] = page; 109 tail = (tail + 1) & slots; 110 } 111 112 pdata->ring_ops->wr_cmd(buf_pool, nbuf); 113 buf_pool->tail = tail; 114 115 return 0; 116 } 117 118 static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool, 119 u32 nbuf) 120 { 121 struct sk_buff *skb; 122 struct xgene_enet_raw_desc16 *raw_desc; 123 struct xgene_enet_pdata *pdata; 124 struct net_device *ndev; 125 struct device *dev; 126 dma_addr_t dma_addr; 127 u32 tail = buf_pool->tail; 128 u32 slots = buf_pool->slots - 1; 129 u16 bufdatalen, len; 130 int i; 131 132 ndev = buf_pool->ndev; 133 dev = ndev_to_dev(buf_pool->ndev); 134 pdata = netdev_priv(ndev); 135 136 bufdatalen = BUF_LEN_CODE_2K | (SKB_BUFFER_SIZE & GENMASK(11, 0)); 137 len = XGENE_ENET_STD_MTU; 138 139 for (i = 0; i < nbuf; i++) { 140 raw_desc = &buf_pool->raw_desc16[tail]; 141 142 skb = netdev_alloc_skb_ip_align(ndev, len); 143 if (unlikely(!skb)) 144 return -ENOMEM; 145 146 dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE); 147 if (dma_mapping_error(dev, dma_addr)) { 148 netdev_err(ndev, "DMA mapping error\n"); 149 dev_kfree_skb_any(skb); 150 return -EINVAL; 151 } 152 153 buf_pool->rx_skb[tail] = skb; 154 155 raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | 156 SET_VAL(BUFDATALEN, bufdatalen) | 157 SET_BIT(COHERENT)); 158 tail = (tail + 1) & slots; 159 } 160 161 pdata->ring_ops->wr_cmd(buf_pool, nbuf); 162 buf_pool->tail = tail; 163 164 return 0; 165 } 166 167 static u8 xgene_enet_hdr_len(const void *data) 168 { 169 const struct ethhdr *eth = data; 170 171 return (eth->h_proto == htons(ETH_P_8021Q)) ? VLAN_ETH_HLEN : ETH_HLEN; 172 } 173 174 static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool) 175 { 176 struct device *dev = ndev_to_dev(buf_pool->ndev); 177 struct xgene_enet_raw_desc16 *raw_desc; 178 dma_addr_t dma_addr; 179 int i; 180 181 /* Free up the buffers held by hardware */ 182 for (i = 0; i < buf_pool->slots; i++) { 183 if (buf_pool->rx_skb[i]) { 184 dev_kfree_skb_any(buf_pool->rx_skb[i]); 185 186 raw_desc = &buf_pool->raw_desc16[i]; 187 dma_addr = GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)); 188 dma_unmap_single(dev, dma_addr, XGENE_ENET_MAX_MTU, 189 DMA_FROM_DEVICE); 190 } 191 } 192 } 193 194 static void xgene_enet_delete_pagepool(struct xgene_enet_desc_ring *buf_pool) 195 { 196 struct device *dev = ndev_to_dev(buf_pool->ndev); 197 dma_addr_t dma_addr; 198 struct page *page; 199 int i; 200 201 /* Free up the buffers held by hardware */ 202 for (i = 0; i < buf_pool->slots; i++) { 203 page = buf_pool->frag_page[i]; 204 if (page) { 205 dma_addr = buf_pool->frag_dma_addr[i]; 206 dma_unmap_page(dev, dma_addr, PAGE_SIZE, 207 DMA_FROM_DEVICE); 208 put_page(page); 209 } 210 } 211 } 212 213 static irqreturn_t xgene_enet_rx_irq(const int irq, void *data) 214 { 215 struct xgene_enet_desc_ring *rx_ring = data; 216 217 if (napi_schedule_prep(&rx_ring->napi)) { 218 disable_irq_nosync(irq); 219 __napi_schedule(&rx_ring->napi); 220 } 221 222 return IRQ_HANDLED; 223 } 224 225 static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring, 226 struct xgene_enet_raw_desc *raw_desc) 227 { 228 struct xgene_enet_pdata *pdata = netdev_priv(cp_ring->ndev); 229 struct sk_buff *skb; 230 struct device *dev; 231 skb_frag_t *frag; 232 dma_addr_t *frag_dma_addr; 233 u16 skb_index; 234 u8 mss_index; 235 u8 status; 236 int i; 237 238 skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); 239 skb = cp_ring->cp_skb[skb_index]; 240 frag_dma_addr = &cp_ring->frag_dma_addr[skb_index * MAX_SKB_FRAGS]; 241 242 dev = ndev_to_dev(cp_ring->ndev); 243 dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)), 244 skb_headlen(skb), 245 DMA_TO_DEVICE); 246 247 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 248 frag = &skb_shinfo(skb)->frags[i]; 249 dma_unmap_page(dev, frag_dma_addr[i], skb_frag_size(frag), 250 DMA_TO_DEVICE); 251 } 252 253 if (GET_BIT(ET, le64_to_cpu(raw_desc->m3))) { 254 mss_index = GET_VAL(MSS, le64_to_cpu(raw_desc->m3)); 255 spin_lock(&pdata->mss_lock); 256 pdata->mss_refcnt[mss_index]--; 257 spin_unlock(&pdata->mss_lock); 258 } 259 260 /* Checking for error */ 261 status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); 262 if (unlikely(status > 2)) { 263 cp_ring->tx_dropped++; 264 cp_ring->tx_errors++; 265 } 266 267 if (likely(skb)) { 268 dev_kfree_skb_any(skb); 269 } else { 270 netdev_err(cp_ring->ndev, "completion skb is NULL\n"); 271 } 272 273 return 0; 274 } 275 276 static int xgene_enet_setup_mss(struct net_device *ndev, u32 mss) 277 { 278 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 279 int mss_index = -EBUSY; 280 int i; 281 282 spin_lock(&pdata->mss_lock); 283 284 /* Reuse the slot if MSS matches */ 285 for (i = 0; mss_index < 0 && i < NUM_MSS_REG; i++) { 286 if (pdata->mss[i] == mss) { 287 pdata->mss_refcnt[i]++; 288 mss_index = i; 289 } 290 } 291 292 /* Overwrite the slot with ref_count = 0 */ 293 for (i = 0; mss_index < 0 && i < NUM_MSS_REG; i++) { 294 if (!pdata->mss_refcnt[i]) { 295 pdata->mss_refcnt[i]++; 296 pdata->mac_ops->set_mss(pdata, mss, i); 297 pdata->mss[i] = mss; 298 mss_index = i; 299 } 300 } 301 302 spin_unlock(&pdata->mss_lock); 303 304 return mss_index; 305 } 306 307 static int xgene_enet_work_msg(struct sk_buff *skb, u64 *hopinfo) 308 { 309 struct net_device *ndev = skb->dev; 310 struct iphdr *iph; 311 u8 l3hlen = 0, l4hlen = 0; 312 u8 ethhdr, proto = 0, csum_enable = 0; 313 u32 hdr_len, mss = 0; 314 u32 i, len, nr_frags; 315 int mss_index; 316 317 ethhdr = xgene_enet_hdr_len(skb->data); 318 319 if (unlikely(skb->protocol != htons(ETH_P_IP)) && 320 unlikely(skb->protocol != htons(ETH_P_8021Q))) 321 goto out; 322 323 if (unlikely(!(skb->dev->features & NETIF_F_IP_CSUM))) 324 goto out; 325 326 iph = ip_hdr(skb); 327 if (unlikely(ip_is_fragment(iph))) 328 goto out; 329 330 if (likely(iph->protocol == IPPROTO_TCP)) { 331 l4hlen = tcp_hdrlen(skb) >> 2; 332 csum_enable = 1; 333 proto = TSO_IPPROTO_TCP; 334 if (ndev->features & NETIF_F_TSO) { 335 hdr_len = ethhdr + ip_hdrlen(skb) + tcp_hdrlen(skb); 336 mss = skb_shinfo(skb)->gso_size; 337 338 if (skb_is_nonlinear(skb)) { 339 len = skb_headlen(skb); 340 nr_frags = skb_shinfo(skb)->nr_frags; 341 342 for (i = 0; i < 2 && i < nr_frags; i++) 343 len += skb_frag_size( 344 &skb_shinfo(skb)->frags[i]); 345 346 /* HW requires header must reside in 3 buffer */ 347 if (unlikely(hdr_len > len)) { 348 if (skb_linearize(skb)) 349 return 0; 350 } 351 } 352 353 if (!mss || ((skb->len - hdr_len) <= mss)) 354 goto out; 355 356 mss_index = xgene_enet_setup_mss(ndev, mss); 357 if (unlikely(mss_index < 0)) 358 return -EBUSY; 359 360 *hopinfo |= SET_BIT(ET) | SET_VAL(MSS, mss_index); 361 } 362 } else if (iph->protocol == IPPROTO_UDP) { 363 l4hlen = UDP_HDR_SIZE; 364 csum_enable = 1; 365 } 366 out: 367 l3hlen = ip_hdrlen(skb) >> 2; 368 *hopinfo |= SET_VAL(TCPHDR, l4hlen) | 369 SET_VAL(IPHDR, l3hlen) | 370 SET_VAL(ETHHDR, ethhdr) | 371 SET_VAL(EC, csum_enable) | 372 SET_VAL(IS, proto) | 373 SET_BIT(IC) | 374 SET_BIT(TYPE_ETH_WORK_MESSAGE); 375 376 return 0; 377 } 378 379 static u16 xgene_enet_encode_len(u16 len) 380 { 381 return (len == BUFLEN_16K) ? 0 : len; 382 } 383 384 static void xgene_set_addr_len(__le64 *desc, u32 idx, dma_addr_t addr, u32 len) 385 { 386 desc[idx ^ 1] = cpu_to_le64(SET_VAL(DATAADDR, addr) | 387 SET_VAL(BUFDATALEN, len)); 388 } 389 390 static __le64 *xgene_enet_get_exp_bufs(struct xgene_enet_desc_ring *ring) 391 { 392 __le64 *exp_bufs; 393 394 exp_bufs = &ring->exp_bufs[ring->exp_buf_tail * MAX_EXP_BUFFS]; 395 memset(exp_bufs, 0, sizeof(__le64) * MAX_EXP_BUFFS); 396 ring->exp_buf_tail = (ring->exp_buf_tail + 1) & ((ring->slots / 2) - 1); 397 398 return exp_bufs; 399 } 400 401 static dma_addr_t *xgene_get_frag_dma_array(struct xgene_enet_desc_ring *ring) 402 { 403 return &ring->cp_ring->frag_dma_addr[ring->tail * MAX_SKB_FRAGS]; 404 } 405 406 static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring, 407 struct sk_buff *skb) 408 { 409 struct device *dev = ndev_to_dev(tx_ring->ndev); 410 struct xgene_enet_pdata *pdata = netdev_priv(tx_ring->ndev); 411 struct xgene_enet_raw_desc *raw_desc; 412 __le64 *exp_desc = NULL, *exp_bufs = NULL; 413 dma_addr_t dma_addr, pbuf_addr, *frag_dma_addr; 414 skb_frag_t *frag; 415 u16 tail = tx_ring->tail; 416 u64 hopinfo = 0; 417 u32 len, hw_len; 418 u8 ll = 0, nv = 0, idx = 0; 419 bool split = false; 420 u32 size, offset, ell_bytes = 0; 421 u32 i, fidx, nr_frags, count = 1; 422 int ret; 423 424 raw_desc = &tx_ring->raw_desc[tail]; 425 tail = (tail + 1) & (tx_ring->slots - 1); 426 memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc)); 427 428 ret = xgene_enet_work_msg(skb, &hopinfo); 429 if (ret) 430 return ret; 431 432 raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) | 433 hopinfo); 434 435 len = skb_headlen(skb); 436 hw_len = xgene_enet_encode_len(len); 437 438 dma_addr = dma_map_single(dev, skb->data, len, DMA_TO_DEVICE); 439 if (dma_mapping_error(dev, dma_addr)) { 440 netdev_err(tx_ring->ndev, "DMA mapping error\n"); 441 return -EINVAL; 442 } 443 444 /* Hardware expects descriptor in little endian format */ 445 raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | 446 SET_VAL(BUFDATALEN, hw_len) | 447 SET_BIT(COHERENT)); 448 449 if (!skb_is_nonlinear(skb)) 450 goto out; 451 452 /* scatter gather */ 453 nv = 1; 454 exp_desc = (void *)&tx_ring->raw_desc[tail]; 455 tail = (tail + 1) & (tx_ring->slots - 1); 456 memset(exp_desc, 0, sizeof(struct xgene_enet_raw_desc)); 457 458 nr_frags = skb_shinfo(skb)->nr_frags; 459 for (i = nr_frags; i < 4 ; i++) 460 exp_desc[i ^ 1] = cpu_to_le64(LAST_BUFFER); 461 462 frag_dma_addr = xgene_get_frag_dma_array(tx_ring); 463 464 for (i = 0, fidx = 0; split || (fidx < nr_frags); i++) { 465 if (!split) { 466 frag = &skb_shinfo(skb)->frags[fidx]; 467 size = skb_frag_size(frag); 468 offset = 0; 469 470 pbuf_addr = skb_frag_dma_map(dev, frag, 0, size, 471 DMA_TO_DEVICE); 472 if (dma_mapping_error(dev, pbuf_addr)) 473 return -EINVAL; 474 475 frag_dma_addr[fidx] = pbuf_addr; 476 fidx++; 477 478 if (size > BUFLEN_16K) 479 split = true; 480 } 481 482 if (size > BUFLEN_16K) { 483 len = BUFLEN_16K; 484 size -= BUFLEN_16K; 485 } else { 486 len = size; 487 split = false; 488 } 489 490 dma_addr = pbuf_addr + offset; 491 hw_len = xgene_enet_encode_len(len); 492 493 switch (i) { 494 case 0: 495 case 1: 496 case 2: 497 xgene_set_addr_len(exp_desc, i, dma_addr, hw_len); 498 break; 499 case 3: 500 if (split || (fidx != nr_frags)) { 501 exp_bufs = xgene_enet_get_exp_bufs(tx_ring); 502 xgene_set_addr_len(exp_bufs, idx, dma_addr, 503 hw_len); 504 idx++; 505 ell_bytes += len; 506 } else { 507 xgene_set_addr_len(exp_desc, i, dma_addr, 508 hw_len); 509 } 510 break; 511 default: 512 xgene_set_addr_len(exp_bufs, idx, dma_addr, hw_len); 513 idx++; 514 ell_bytes += len; 515 break; 516 } 517 518 if (split) 519 offset += BUFLEN_16K; 520 } 521 count++; 522 523 if (idx) { 524 ll = 1; 525 dma_addr = dma_map_single(dev, exp_bufs, 526 sizeof(u64) * MAX_EXP_BUFFS, 527 DMA_TO_DEVICE); 528 if (dma_mapping_error(dev, dma_addr)) { 529 dev_kfree_skb_any(skb); 530 return -EINVAL; 531 } 532 i = ell_bytes >> LL_BYTES_LSB_LEN; 533 exp_desc[2] = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | 534 SET_VAL(LL_BYTES_MSB, i) | 535 SET_VAL(LL_LEN, idx)); 536 raw_desc->m2 = cpu_to_le64(SET_VAL(LL_BYTES_LSB, ell_bytes)); 537 } 538 539 out: 540 raw_desc->m0 = cpu_to_le64(SET_VAL(LL, ll) | SET_VAL(NV, nv) | 541 SET_VAL(USERINFO, tx_ring->tail)); 542 tx_ring->cp_ring->cp_skb[tx_ring->tail] = skb; 543 pdata->tx_level[tx_ring->cp_ring->index] += count; 544 tx_ring->tail = tail; 545 546 return count; 547 } 548 549 static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, 550 struct net_device *ndev) 551 { 552 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 553 struct xgene_enet_desc_ring *tx_ring; 554 int index = skb->queue_mapping; 555 u32 tx_level = pdata->tx_level[index]; 556 int count; 557 558 tx_ring = pdata->tx_ring[index]; 559 if (tx_level < pdata->txc_level[index]) 560 tx_level += ((typeof(pdata->tx_level[index]))~0U); 561 562 if ((tx_level - pdata->txc_level[index]) > pdata->tx_qcnt_hi) { 563 netif_stop_subqueue(ndev, index); 564 return NETDEV_TX_BUSY; 565 } 566 567 if (skb_padto(skb, XGENE_MIN_ENET_FRAME_SIZE)) 568 return NETDEV_TX_OK; 569 570 count = xgene_enet_setup_tx_desc(tx_ring, skb); 571 if (count == -EBUSY) 572 return NETDEV_TX_BUSY; 573 574 if (count <= 0) { 575 dev_kfree_skb_any(skb); 576 return NETDEV_TX_OK; 577 } 578 579 skb_tx_timestamp(skb); 580 581 tx_ring->tx_packets++; 582 tx_ring->tx_bytes += skb->len; 583 584 pdata->ring_ops->wr_cmd(tx_ring, count); 585 return NETDEV_TX_OK; 586 } 587 588 static void xgene_enet_rx_csum(struct sk_buff *skb) 589 { 590 struct net_device *ndev = skb->dev; 591 struct iphdr *iph = ip_hdr(skb); 592 593 if (!(ndev->features & NETIF_F_RXCSUM)) 594 return; 595 596 if (skb->protocol != htons(ETH_P_IP)) 597 return; 598 599 if (ip_is_fragment(iph)) 600 return; 601 602 if (iph->protocol != IPPROTO_TCP && iph->protocol != IPPROTO_UDP) 603 return; 604 605 skb->ip_summed = CHECKSUM_UNNECESSARY; 606 } 607 608 static void xgene_enet_free_pagepool(struct xgene_enet_desc_ring *buf_pool, 609 struct xgene_enet_raw_desc *raw_desc, 610 struct xgene_enet_raw_desc *exp_desc) 611 { 612 __le64 *desc = (void *)exp_desc; 613 dma_addr_t dma_addr; 614 struct device *dev; 615 struct page *page; 616 u16 slots, head; 617 u32 frag_size; 618 int i; 619 620 if (!buf_pool || !raw_desc || !exp_desc || 621 (!GET_VAL(NV, le64_to_cpu(raw_desc->m0)))) 622 return; 623 624 dev = ndev_to_dev(buf_pool->ndev); 625 slots = buf_pool->slots - 1; 626 head = buf_pool->head; 627 628 for (i = 0; i < 4; i++) { 629 frag_size = xgene_enet_get_data_len(le64_to_cpu(desc[i ^ 1])); 630 if (!frag_size) 631 break; 632 633 dma_addr = GET_VAL(DATAADDR, le64_to_cpu(desc[i ^ 1])); 634 dma_unmap_page(dev, dma_addr, PAGE_SIZE, DMA_FROM_DEVICE); 635 636 page = buf_pool->frag_page[head]; 637 put_page(page); 638 639 buf_pool->frag_page[head] = NULL; 640 head = (head + 1) & slots; 641 } 642 buf_pool->head = head; 643 } 644 645 /* Errata 10GE_10 and ENET_15 - Fix duplicated HW statistic counters */ 646 static bool xgene_enet_errata_10GE_10(struct sk_buff *skb, u32 len, u8 status) 647 { 648 if (status == INGRESS_CRC && 649 len >= (ETHER_STD_PACKET + 1) && 650 len <= (ETHER_STD_PACKET + 4) && 651 skb->protocol == htons(ETH_P_8021Q)) 652 return true; 653 654 return false; 655 } 656 657 /* Errata 10GE_8 and ENET_11 - allow packet with length <=64B */ 658 static bool xgene_enet_errata_10GE_8(struct sk_buff *skb, u32 len, u8 status) 659 { 660 if (status == INGRESS_PKT_LEN && len == ETHER_MIN_PACKET) { 661 if (ntohs(eth_hdr(skb)->h_proto) < 46) 662 return true; 663 } 664 665 return false; 666 } 667 668 static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, 669 struct xgene_enet_raw_desc *raw_desc, 670 struct xgene_enet_raw_desc *exp_desc) 671 { 672 struct xgene_enet_desc_ring *buf_pool, *page_pool; 673 u32 datalen, frag_size, skb_index; 674 struct xgene_enet_pdata *pdata; 675 struct net_device *ndev; 676 dma_addr_t dma_addr; 677 struct sk_buff *skb; 678 struct device *dev; 679 struct page *page; 680 u16 slots, head; 681 int i, ret = 0; 682 __le64 *desc; 683 u8 status; 684 bool nv; 685 686 ndev = rx_ring->ndev; 687 pdata = netdev_priv(ndev); 688 dev = ndev_to_dev(rx_ring->ndev); 689 buf_pool = rx_ring->buf_pool; 690 page_pool = rx_ring->page_pool; 691 692 dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)), 693 XGENE_ENET_STD_MTU, DMA_FROM_DEVICE); 694 skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); 695 skb = buf_pool->rx_skb[skb_index]; 696 buf_pool->rx_skb[skb_index] = NULL; 697 698 datalen = xgene_enet_get_data_len(le64_to_cpu(raw_desc->m1)); 699 700 /* strip off CRC as HW isn't doing this */ 701 nv = GET_VAL(NV, le64_to_cpu(raw_desc->m0)); 702 if (!nv) 703 datalen -= 4; 704 705 skb_put(skb, datalen); 706 prefetch(skb->data - NET_IP_ALIGN); 707 skb->protocol = eth_type_trans(skb, ndev); 708 709 /* checking for error */ 710 status = (GET_VAL(ELERR, le64_to_cpu(raw_desc->m0)) << LERR_LEN) | 711 GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); 712 if (unlikely(status)) { 713 if (xgene_enet_errata_10GE_8(skb, datalen, status)) { 714 pdata->false_rflr++; 715 } else if (xgene_enet_errata_10GE_10(skb, datalen, status)) { 716 pdata->vlan_rjbr++; 717 } else { 718 dev_kfree_skb_any(skb); 719 xgene_enet_free_pagepool(page_pool, raw_desc, exp_desc); 720 xgene_enet_parse_error(rx_ring, status); 721 rx_ring->rx_dropped++; 722 goto out; 723 } 724 } 725 726 if (!nv) 727 goto skip_jumbo; 728 729 slots = page_pool->slots - 1; 730 head = page_pool->head; 731 desc = (void *)exp_desc; 732 733 for (i = 0; i < 4; i++) { 734 frag_size = xgene_enet_get_data_len(le64_to_cpu(desc[i ^ 1])); 735 if (!frag_size) 736 break; 737 738 dma_addr = GET_VAL(DATAADDR, le64_to_cpu(desc[i ^ 1])); 739 dma_unmap_page(dev, dma_addr, PAGE_SIZE, DMA_FROM_DEVICE); 740 741 page = page_pool->frag_page[head]; 742 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, 0, 743 frag_size, PAGE_SIZE); 744 745 datalen += frag_size; 746 747 page_pool->frag_page[head] = NULL; 748 head = (head + 1) & slots; 749 } 750 751 page_pool->head = head; 752 rx_ring->npagepool -= skb_shinfo(skb)->nr_frags; 753 754 skip_jumbo: 755 skb_checksum_none_assert(skb); 756 xgene_enet_rx_csum(skb); 757 758 rx_ring->rx_packets++; 759 rx_ring->rx_bytes += datalen; 760 napi_gro_receive(&rx_ring->napi, skb); 761 762 out: 763 if (rx_ring->npagepool <= 0) { 764 ret = xgene_enet_refill_pagepool(page_pool, NUM_NXTBUFPOOL); 765 rx_ring->npagepool = NUM_NXTBUFPOOL; 766 if (ret) 767 return ret; 768 } 769 770 if (--rx_ring->nbufpool == 0) { 771 ret = xgene_enet_refill_bufpool(buf_pool, NUM_BUFPOOL); 772 rx_ring->nbufpool = NUM_BUFPOOL; 773 } 774 775 return ret; 776 } 777 778 static bool is_rx_desc(struct xgene_enet_raw_desc *raw_desc) 779 { 780 return GET_VAL(FPQNUM, le64_to_cpu(raw_desc->m0)) ? true : false; 781 } 782 783 static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring, 784 int budget) 785 { 786 struct net_device *ndev = ring->ndev; 787 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 788 struct xgene_enet_raw_desc *raw_desc, *exp_desc; 789 u16 head = ring->head; 790 u16 slots = ring->slots - 1; 791 int ret, desc_count, count = 0, processed = 0; 792 bool is_completion; 793 794 do { 795 raw_desc = &ring->raw_desc[head]; 796 desc_count = 0; 797 is_completion = false; 798 exp_desc = NULL; 799 if (unlikely(xgene_enet_is_desc_slot_empty(raw_desc))) 800 break; 801 802 /* read fpqnum field after dataaddr field */ 803 dma_rmb(); 804 if (GET_BIT(NV, le64_to_cpu(raw_desc->m0))) { 805 head = (head + 1) & slots; 806 exp_desc = &ring->raw_desc[head]; 807 808 if (unlikely(xgene_enet_is_desc_slot_empty(exp_desc))) { 809 head = (head - 1) & slots; 810 break; 811 } 812 dma_rmb(); 813 count++; 814 desc_count++; 815 } 816 if (is_rx_desc(raw_desc)) { 817 ret = xgene_enet_rx_frame(ring, raw_desc, exp_desc); 818 } else { 819 ret = xgene_enet_tx_completion(ring, raw_desc); 820 is_completion = true; 821 } 822 xgene_enet_mark_desc_slot_empty(raw_desc); 823 if (exp_desc) 824 xgene_enet_mark_desc_slot_empty(exp_desc); 825 826 head = (head + 1) & slots; 827 count++; 828 desc_count++; 829 processed++; 830 if (is_completion) 831 pdata->txc_level[ring->index] += desc_count; 832 833 if (ret) 834 break; 835 } while (--budget); 836 837 if (likely(count)) { 838 pdata->ring_ops->wr_cmd(ring, -count); 839 ring->head = head; 840 841 if (__netif_subqueue_stopped(ndev, ring->index)) 842 netif_start_subqueue(ndev, ring->index); 843 } 844 845 return processed; 846 } 847 848 static int xgene_enet_napi(struct napi_struct *napi, const int budget) 849 { 850 struct xgene_enet_desc_ring *ring; 851 int processed; 852 853 ring = container_of(napi, struct xgene_enet_desc_ring, napi); 854 processed = xgene_enet_process_ring(ring, budget); 855 856 if (processed != budget) { 857 napi_complete_done(napi, processed); 858 enable_irq(ring->irq); 859 } 860 861 return processed; 862 } 863 864 static void xgene_enet_timeout(struct net_device *ndev, unsigned int txqueue) 865 { 866 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 867 struct netdev_queue *txq; 868 int i; 869 870 pdata->mac_ops->reset(pdata); 871 872 for (i = 0; i < pdata->txq_cnt; i++) { 873 txq = netdev_get_tx_queue(ndev, i); 874 txq_trans_cond_update(txq); 875 netif_tx_start_queue(txq); 876 } 877 } 878 879 static void xgene_enet_set_irq_name(struct net_device *ndev) 880 { 881 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 882 struct xgene_enet_desc_ring *ring; 883 int i; 884 885 for (i = 0; i < pdata->rxq_cnt; i++) { 886 ring = pdata->rx_ring[i]; 887 if (!pdata->cq_cnt) { 888 snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-rx-txc", 889 ndev->name); 890 } else { 891 snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-rx-%d", 892 ndev->name, i); 893 } 894 } 895 896 for (i = 0; i < pdata->cq_cnt; i++) { 897 ring = pdata->tx_ring[i]->cp_ring; 898 snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-txc-%d", 899 ndev->name, i); 900 } 901 } 902 903 static int xgene_enet_register_irq(struct net_device *ndev) 904 { 905 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 906 struct device *dev = ndev_to_dev(ndev); 907 struct xgene_enet_desc_ring *ring; 908 int ret = 0, i; 909 910 xgene_enet_set_irq_name(ndev); 911 for (i = 0; i < pdata->rxq_cnt; i++) { 912 ring = pdata->rx_ring[i]; 913 irq_set_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); 914 ret = devm_request_irq(dev, ring->irq, xgene_enet_rx_irq, 915 0, ring->irq_name, ring); 916 if (ret) { 917 netdev_err(ndev, "Failed to request irq %s\n", 918 ring->irq_name); 919 } 920 } 921 922 for (i = 0; i < pdata->cq_cnt; i++) { 923 ring = pdata->tx_ring[i]->cp_ring; 924 irq_set_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); 925 ret = devm_request_irq(dev, ring->irq, xgene_enet_rx_irq, 926 0, ring->irq_name, ring); 927 if (ret) { 928 netdev_err(ndev, "Failed to request irq %s\n", 929 ring->irq_name); 930 } 931 } 932 933 return ret; 934 } 935 936 static void xgene_enet_free_irq(struct net_device *ndev) 937 { 938 struct xgene_enet_pdata *pdata; 939 struct xgene_enet_desc_ring *ring; 940 struct device *dev; 941 int i; 942 943 pdata = netdev_priv(ndev); 944 dev = ndev_to_dev(ndev); 945 946 for (i = 0; i < pdata->rxq_cnt; i++) { 947 ring = pdata->rx_ring[i]; 948 irq_clear_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); 949 devm_free_irq(dev, ring->irq, ring); 950 } 951 952 for (i = 0; i < pdata->cq_cnt; i++) { 953 ring = pdata->tx_ring[i]->cp_ring; 954 irq_clear_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); 955 devm_free_irq(dev, ring->irq, ring); 956 } 957 } 958 959 static void xgene_enet_napi_enable(struct xgene_enet_pdata *pdata) 960 { 961 struct napi_struct *napi; 962 int i; 963 964 for (i = 0; i < pdata->rxq_cnt; i++) { 965 napi = &pdata->rx_ring[i]->napi; 966 napi_enable(napi); 967 } 968 969 for (i = 0; i < pdata->cq_cnt; i++) { 970 napi = &pdata->tx_ring[i]->cp_ring->napi; 971 napi_enable(napi); 972 } 973 } 974 975 static void xgene_enet_napi_disable(struct xgene_enet_pdata *pdata) 976 { 977 struct napi_struct *napi; 978 int i; 979 980 for (i = 0; i < pdata->rxq_cnt; i++) { 981 napi = &pdata->rx_ring[i]->napi; 982 napi_disable(napi); 983 } 984 985 for (i = 0; i < pdata->cq_cnt; i++) { 986 napi = &pdata->tx_ring[i]->cp_ring->napi; 987 napi_disable(napi); 988 } 989 } 990 991 static int xgene_enet_open(struct net_device *ndev) 992 { 993 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 994 const struct xgene_mac_ops *mac_ops = pdata->mac_ops; 995 int ret; 996 997 ret = netif_set_real_num_tx_queues(ndev, pdata->txq_cnt); 998 if (ret) 999 return ret; 1000 1001 ret = netif_set_real_num_rx_queues(ndev, pdata->rxq_cnt); 1002 if (ret) 1003 return ret; 1004 1005 xgene_enet_napi_enable(pdata); 1006 ret = xgene_enet_register_irq(ndev); 1007 if (ret) 1008 return ret; 1009 1010 if (ndev->phydev) { 1011 phy_start(ndev->phydev); 1012 } else { 1013 schedule_delayed_work(&pdata->link_work, PHY_POLL_LINK_OFF); 1014 netif_carrier_off(ndev); 1015 } 1016 1017 mac_ops->tx_enable(pdata); 1018 mac_ops->rx_enable(pdata); 1019 netif_tx_start_all_queues(ndev); 1020 1021 return ret; 1022 } 1023 1024 static int xgene_enet_close(struct net_device *ndev) 1025 { 1026 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 1027 const struct xgene_mac_ops *mac_ops = pdata->mac_ops; 1028 int i; 1029 1030 netif_tx_stop_all_queues(ndev); 1031 mac_ops->tx_disable(pdata); 1032 mac_ops->rx_disable(pdata); 1033 1034 if (ndev->phydev) 1035 phy_stop(ndev->phydev); 1036 else 1037 cancel_delayed_work_sync(&pdata->link_work); 1038 1039 xgene_enet_free_irq(ndev); 1040 xgene_enet_napi_disable(pdata); 1041 for (i = 0; i < pdata->rxq_cnt; i++) 1042 xgene_enet_process_ring(pdata->rx_ring[i], -1); 1043 1044 return 0; 1045 } 1046 static void xgene_enet_delete_ring(struct xgene_enet_desc_ring *ring) 1047 { 1048 struct xgene_enet_pdata *pdata; 1049 struct device *dev; 1050 1051 pdata = netdev_priv(ring->ndev); 1052 dev = ndev_to_dev(ring->ndev); 1053 1054 pdata->ring_ops->clear(ring); 1055 dmam_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); 1056 } 1057 1058 static void xgene_enet_delete_desc_rings(struct xgene_enet_pdata *pdata) 1059 { 1060 struct xgene_enet_desc_ring *buf_pool, *page_pool; 1061 struct xgene_enet_desc_ring *ring; 1062 int i; 1063 1064 for (i = 0; i < pdata->txq_cnt; i++) { 1065 ring = pdata->tx_ring[i]; 1066 if (ring) { 1067 xgene_enet_delete_ring(ring); 1068 pdata->port_ops->clear(pdata, ring); 1069 if (pdata->cq_cnt) 1070 xgene_enet_delete_ring(ring->cp_ring); 1071 pdata->tx_ring[i] = NULL; 1072 } 1073 1074 } 1075 1076 for (i = 0; i < pdata->rxq_cnt; i++) { 1077 ring = pdata->rx_ring[i]; 1078 if (ring) { 1079 page_pool = ring->page_pool; 1080 if (page_pool) { 1081 xgene_enet_delete_pagepool(page_pool); 1082 xgene_enet_delete_ring(page_pool); 1083 pdata->port_ops->clear(pdata, page_pool); 1084 } 1085 1086 buf_pool = ring->buf_pool; 1087 xgene_enet_delete_bufpool(buf_pool); 1088 xgene_enet_delete_ring(buf_pool); 1089 pdata->port_ops->clear(pdata, buf_pool); 1090 1091 xgene_enet_delete_ring(ring); 1092 pdata->rx_ring[i] = NULL; 1093 } 1094 1095 } 1096 } 1097 1098 static int xgene_enet_get_ring_size(struct device *dev, 1099 enum xgene_enet_ring_cfgsize cfgsize) 1100 { 1101 int size = -EINVAL; 1102 1103 switch (cfgsize) { 1104 case RING_CFGSIZE_512B: 1105 size = 0x200; 1106 break; 1107 case RING_CFGSIZE_2KB: 1108 size = 0x800; 1109 break; 1110 case RING_CFGSIZE_16KB: 1111 size = 0x4000; 1112 break; 1113 case RING_CFGSIZE_64KB: 1114 size = 0x10000; 1115 break; 1116 case RING_CFGSIZE_512KB: 1117 size = 0x80000; 1118 break; 1119 default: 1120 dev_err(dev, "Unsupported cfg ring size %d\n", cfgsize); 1121 break; 1122 } 1123 1124 return size; 1125 } 1126 1127 static void xgene_enet_free_desc_ring(struct xgene_enet_desc_ring *ring) 1128 { 1129 struct xgene_enet_pdata *pdata; 1130 struct device *dev; 1131 1132 if (!ring) 1133 return; 1134 1135 dev = ndev_to_dev(ring->ndev); 1136 pdata = netdev_priv(ring->ndev); 1137 1138 if (ring->desc_addr) { 1139 pdata->ring_ops->clear(ring); 1140 dmam_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); 1141 } 1142 devm_kfree(dev, ring); 1143 } 1144 1145 static void xgene_enet_free_desc_rings(struct xgene_enet_pdata *pdata) 1146 { 1147 struct xgene_enet_desc_ring *page_pool; 1148 struct device *dev = &pdata->pdev->dev; 1149 struct xgene_enet_desc_ring *ring; 1150 void *p; 1151 int i; 1152 1153 for (i = 0; i < pdata->txq_cnt; i++) { 1154 ring = pdata->tx_ring[i]; 1155 if (ring) { 1156 if (ring->cp_ring && ring->cp_ring->cp_skb) 1157 devm_kfree(dev, ring->cp_ring->cp_skb); 1158 1159 if (ring->cp_ring && pdata->cq_cnt) 1160 xgene_enet_free_desc_ring(ring->cp_ring); 1161 1162 xgene_enet_free_desc_ring(ring); 1163 } 1164 1165 } 1166 1167 for (i = 0; i < pdata->rxq_cnt; i++) { 1168 ring = pdata->rx_ring[i]; 1169 if (ring) { 1170 if (ring->buf_pool) { 1171 if (ring->buf_pool->rx_skb) 1172 devm_kfree(dev, ring->buf_pool->rx_skb); 1173 1174 xgene_enet_free_desc_ring(ring->buf_pool); 1175 } 1176 1177 page_pool = ring->page_pool; 1178 if (page_pool) { 1179 p = page_pool->frag_page; 1180 if (p) 1181 devm_kfree(dev, p); 1182 1183 p = page_pool->frag_dma_addr; 1184 if (p) 1185 devm_kfree(dev, p); 1186 } 1187 1188 xgene_enet_free_desc_ring(ring); 1189 } 1190 } 1191 } 1192 1193 static bool is_irq_mbox_required(struct xgene_enet_pdata *pdata, 1194 struct xgene_enet_desc_ring *ring) 1195 { 1196 if ((pdata->enet_id == XGENE_ENET2) && 1197 (xgene_enet_ring_owner(ring->id) == RING_OWNER_CPU)) { 1198 return true; 1199 } 1200 1201 return false; 1202 } 1203 1204 static void __iomem *xgene_enet_ring_cmd_base(struct xgene_enet_pdata *pdata, 1205 struct xgene_enet_desc_ring *ring) 1206 { 1207 u8 num_ring_id_shift = pdata->ring_ops->num_ring_id_shift; 1208 1209 return pdata->ring_cmd_addr + (ring->num << num_ring_id_shift); 1210 } 1211 1212 static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring( 1213 struct net_device *ndev, u32 ring_num, 1214 enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id) 1215 { 1216 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 1217 struct device *dev = ndev_to_dev(ndev); 1218 struct xgene_enet_desc_ring *ring; 1219 void *irq_mbox_addr; 1220 int size; 1221 1222 size = xgene_enet_get_ring_size(dev, cfgsize); 1223 if (size < 0) 1224 return NULL; 1225 1226 ring = devm_kzalloc(dev, sizeof(struct xgene_enet_desc_ring), 1227 GFP_KERNEL); 1228 if (!ring) 1229 return NULL; 1230 1231 ring->ndev = ndev; 1232 ring->num = ring_num; 1233 ring->cfgsize = cfgsize; 1234 ring->id = ring_id; 1235 1236 ring->desc_addr = dmam_alloc_coherent(dev, size, &ring->dma, 1237 GFP_KERNEL | __GFP_ZERO); 1238 if (!ring->desc_addr) { 1239 devm_kfree(dev, ring); 1240 return NULL; 1241 } 1242 ring->size = size; 1243 1244 if (is_irq_mbox_required(pdata, ring)) { 1245 irq_mbox_addr = dmam_alloc_coherent(dev, INTR_MBOX_SIZE, 1246 &ring->irq_mbox_dma, 1247 GFP_KERNEL | __GFP_ZERO); 1248 if (!irq_mbox_addr) { 1249 dmam_free_coherent(dev, size, ring->desc_addr, 1250 ring->dma); 1251 devm_kfree(dev, ring); 1252 return NULL; 1253 } 1254 ring->irq_mbox_addr = irq_mbox_addr; 1255 } 1256 1257 ring->cmd_base = xgene_enet_ring_cmd_base(pdata, ring); 1258 ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR; 1259 ring = pdata->ring_ops->setup(ring); 1260 netdev_dbg(ndev, "ring info: num=%d size=%d id=%d slots=%d\n", 1261 ring->num, ring->size, ring->id, ring->slots); 1262 1263 return ring; 1264 } 1265 1266 static u16 xgene_enet_get_ring_id(enum xgene_ring_owner owner, u8 bufnum) 1267 { 1268 return (owner << 6) | (bufnum & GENMASK(5, 0)); 1269 } 1270 1271 static enum xgene_ring_owner xgene_derive_ring_owner(struct xgene_enet_pdata *p) 1272 { 1273 enum xgene_ring_owner owner; 1274 1275 if (p->enet_id == XGENE_ENET1) { 1276 switch (p->phy_mode) { 1277 case PHY_INTERFACE_MODE_SGMII: 1278 owner = RING_OWNER_ETH0; 1279 break; 1280 default: 1281 owner = (!p->port_id) ? RING_OWNER_ETH0 : 1282 RING_OWNER_ETH1; 1283 break; 1284 } 1285 } else { 1286 owner = (!p->port_id) ? RING_OWNER_ETH0 : RING_OWNER_ETH1; 1287 } 1288 1289 return owner; 1290 } 1291 1292 static u8 xgene_start_cpu_bufnum(struct xgene_enet_pdata *pdata) 1293 { 1294 struct device *dev = &pdata->pdev->dev; 1295 u32 cpu_bufnum; 1296 int ret; 1297 1298 ret = device_property_read_u32(dev, "channel", &cpu_bufnum); 1299 1300 return (!ret) ? cpu_bufnum : pdata->cpu_bufnum; 1301 } 1302 1303 static int xgene_enet_create_desc_rings(struct net_device *ndev) 1304 { 1305 struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring; 1306 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 1307 struct xgene_enet_desc_ring *page_pool = NULL; 1308 struct xgene_enet_desc_ring *buf_pool = NULL; 1309 struct device *dev = ndev_to_dev(ndev); 1310 u8 eth_bufnum = pdata->eth_bufnum; 1311 u8 bp_bufnum = pdata->bp_bufnum; 1312 u16 ring_num = pdata->ring_num; 1313 enum xgene_ring_owner owner; 1314 dma_addr_t dma_exp_bufs; 1315 u16 ring_id, slots; 1316 __le64 *exp_bufs; 1317 int i, ret, size; 1318 u8 cpu_bufnum; 1319 1320 cpu_bufnum = xgene_start_cpu_bufnum(pdata); 1321 1322 for (i = 0; i < pdata->rxq_cnt; i++) { 1323 /* allocate rx descriptor ring */ 1324 owner = xgene_derive_ring_owner(pdata); 1325 ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, cpu_bufnum++); 1326 rx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, 1327 RING_CFGSIZE_16KB, 1328 ring_id); 1329 if (!rx_ring) { 1330 ret = -ENOMEM; 1331 goto err; 1332 } 1333 1334 /* allocate buffer pool for receiving packets */ 1335 owner = xgene_derive_ring_owner(pdata); 1336 ring_id = xgene_enet_get_ring_id(owner, bp_bufnum++); 1337 buf_pool = xgene_enet_create_desc_ring(ndev, ring_num++, 1338 RING_CFGSIZE_16KB, 1339 ring_id); 1340 if (!buf_pool) { 1341 ret = -ENOMEM; 1342 goto err; 1343 } 1344 1345 rx_ring->nbufpool = NUM_BUFPOOL; 1346 rx_ring->npagepool = NUM_NXTBUFPOOL; 1347 rx_ring->irq = pdata->irqs[i]; 1348 buf_pool->rx_skb = devm_kcalloc(dev, buf_pool->slots, 1349 sizeof(struct sk_buff *), 1350 GFP_KERNEL); 1351 if (!buf_pool->rx_skb) { 1352 ret = -ENOMEM; 1353 goto err; 1354 } 1355 1356 buf_pool->dst_ring_num = xgene_enet_dst_ring_num(buf_pool); 1357 rx_ring->buf_pool = buf_pool; 1358 pdata->rx_ring[i] = rx_ring; 1359 1360 if ((pdata->enet_id == XGENE_ENET1 && pdata->rxq_cnt > 4) || 1361 (pdata->enet_id == XGENE_ENET2 && pdata->rxq_cnt > 16)) { 1362 break; 1363 } 1364 1365 /* allocate next buffer pool for jumbo packets */ 1366 owner = xgene_derive_ring_owner(pdata); 1367 ring_id = xgene_enet_get_ring_id(owner, bp_bufnum++); 1368 page_pool = xgene_enet_create_desc_ring(ndev, ring_num++, 1369 RING_CFGSIZE_16KB, 1370 ring_id); 1371 if (!page_pool) { 1372 ret = -ENOMEM; 1373 goto err; 1374 } 1375 1376 slots = page_pool->slots; 1377 page_pool->frag_page = devm_kcalloc(dev, slots, 1378 sizeof(struct page *), 1379 GFP_KERNEL); 1380 if (!page_pool->frag_page) { 1381 ret = -ENOMEM; 1382 goto err; 1383 } 1384 1385 page_pool->frag_dma_addr = devm_kcalloc(dev, slots, 1386 sizeof(dma_addr_t), 1387 GFP_KERNEL); 1388 if (!page_pool->frag_dma_addr) { 1389 ret = -ENOMEM; 1390 goto err; 1391 } 1392 1393 page_pool->dst_ring_num = xgene_enet_dst_ring_num(page_pool); 1394 rx_ring->page_pool = page_pool; 1395 } 1396 1397 for (i = 0; i < pdata->txq_cnt; i++) { 1398 /* allocate tx descriptor ring */ 1399 owner = xgene_derive_ring_owner(pdata); 1400 ring_id = xgene_enet_get_ring_id(owner, eth_bufnum++); 1401 tx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, 1402 RING_CFGSIZE_16KB, 1403 ring_id); 1404 if (!tx_ring) { 1405 ret = -ENOMEM; 1406 goto err; 1407 } 1408 1409 size = (tx_ring->slots / 2) * sizeof(__le64) * MAX_EXP_BUFFS; 1410 exp_bufs = dmam_alloc_coherent(dev, size, &dma_exp_bufs, 1411 GFP_KERNEL | __GFP_ZERO); 1412 if (!exp_bufs) { 1413 ret = -ENOMEM; 1414 goto err; 1415 } 1416 tx_ring->exp_bufs = exp_bufs; 1417 1418 pdata->tx_ring[i] = tx_ring; 1419 1420 if (!pdata->cq_cnt) { 1421 cp_ring = pdata->rx_ring[i]; 1422 } else { 1423 /* allocate tx completion descriptor ring */ 1424 ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, 1425 cpu_bufnum++); 1426 cp_ring = xgene_enet_create_desc_ring(ndev, ring_num++, 1427 RING_CFGSIZE_16KB, 1428 ring_id); 1429 if (!cp_ring) { 1430 ret = -ENOMEM; 1431 goto err; 1432 } 1433 1434 cp_ring->irq = pdata->irqs[pdata->rxq_cnt + i]; 1435 cp_ring->index = i; 1436 } 1437 1438 cp_ring->cp_skb = devm_kcalloc(dev, tx_ring->slots, 1439 sizeof(struct sk_buff *), 1440 GFP_KERNEL); 1441 if (!cp_ring->cp_skb) { 1442 ret = -ENOMEM; 1443 goto err; 1444 } 1445 1446 size = sizeof(dma_addr_t) * MAX_SKB_FRAGS; 1447 cp_ring->frag_dma_addr = devm_kcalloc(dev, tx_ring->slots, 1448 size, GFP_KERNEL); 1449 if (!cp_ring->frag_dma_addr) { 1450 devm_kfree(dev, cp_ring->cp_skb); 1451 ret = -ENOMEM; 1452 goto err; 1453 } 1454 1455 tx_ring->cp_ring = cp_ring; 1456 tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring); 1457 } 1458 1459 if (pdata->ring_ops->coalesce) 1460 pdata->ring_ops->coalesce(pdata->tx_ring[0]); 1461 pdata->tx_qcnt_hi = pdata->tx_ring[0]->slots - 128; 1462 1463 return 0; 1464 1465 err: 1466 xgene_enet_free_desc_rings(pdata); 1467 return ret; 1468 } 1469 1470 static void xgene_enet_get_stats64( 1471 struct net_device *ndev, 1472 struct rtnl_link_stats64 *stats) 1473 { 1474 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 1475 struct xgene_enet_desc_ring *ring; 1476 int i; 1477 1478 for (i = 0; i < pdata->txq_cnt; i++) { 1479 ring = pdata->tx_ring[i]; 1480 if (ring) { 1481 stats->tx_packets += ring->tx_packets; 1482 stats->tx_bytes += ring->tx_bytes; 1483 stats->tx_dropped += ring->tx_dropped; 1484 stats->tx_errors += ring->tx_errors; 1485 } 1486 } 1487 1488 for (i = 0; i < pdata->rxq_cnt; i++) { 1489 ring = pdata->rx_ring[i]; 1490 if (ring) { 1491 stats->rx_packets += ring->rx_packets; 1492 stats->rx_bytes += ring->rx_bytes; 1493 stats->rx_dropped += ring->rx_dropped; 1494 stats->rx_errors += ring->rx_errors + 1495 ring->rx_length_errors + 1496 ring->rx_crc_errors + 1497 ring->rx_frame_errors + 1498 ring->rx_fifo_errors; 1499 stats->rx_length_errors += ring->rx_length_errors; 1500 stats->rx_crc_errors += ring->rx_crc_errors; 1501 stats->rx_frame_errors += ring->rx_frame_errors; 1502 stats->rx_fifo_errors += ring->rx_fifo_errors; 1503 } 1504 } 1505 } 1506 1507 static int xgene_enet_set_mac_address(struct net_device *ndev, void *addr) 1508 { 1509 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 1510 int ret; 1511 1512 ret = eth_mac_addr(ndev, addr); 1513 if (ret) 1514 return ret; 1515 pdata->mac_ops->set_mac_addr(pdata); 1516 1517 return ret; 1518 } 1519 1520 static int xgene_change_mtu(struct net_device *ndev, int new_mtu) 1521 { 1522 struct xgene_enet_pdata *pdata = netdev_priv(ndev); 1523 int frame_size; 1524 1525 if (!netif_running(ndev)) 1526 return 0; 1527 1528 frame_size = (new_mtu > ETH_DATA_LEN) ? (new_mtu + 18) : 0x600; 1529 1530 xgene_enet_close(ndev); 1531 ndev->mtu = new_mtu; 1532 pdata->mac_ops->set_framesize(pdata, frame_size); 1533 xgene_enet_open(ndev); 1534 1535 return 0; 1536 } 1537 1538 static const struct net_device_ops xgene_ndev_ops = { 1539 .ndo_open = xgene_enet_open, 1540 .ndo_stop = xgene_enet_close, 1541 .ndo_start_xmit = xgene_enet_start_xmit, 1542 .ndo_tx_timeout = xgene_enet_timeout, 1543 .ndo_get_stats64 = xgene_enet_get_stats64, 1544 .ndo_change_mtu = xgene_change_mtu, 1545 .ndo_set_mac_address = xgene_enet_set_mac_address, 1546 }; 1547 1548 #ifdef CONFIG_ACPI 1549 static void xgene_get_port_id_acpi(struct device *dev, 1550 struct xgene_enet_pdata *pdata) 1551 { 1552 acpi_status status; 1553 u64 temp; 1554 1555 status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_SUN", NULL, &temp); 1556 if (ACPI_FAILURE(status)) { 1557 pdata->port_id = 0; 1558 } else { 1559 pdata->port_id = temp; 1560 } 1561 1562 return; 1563 } 1564 #endif 1565 1566 static void xgene_get_port_id_dt(struct device *dev, struct xgene_enet_pdata *pdata) 1567 { 1568 u32 id = 0; 1569 1570 of_property_read_u32(dev->of_node, "port-id", &id); 1571 1572 pdata->port_id = id & BIT(0); 1573 1574 return; 1575 } 1576 1577 static int xgene_get_tx_delay(struct xgene_enet_pdata *pdata) 1578 { 1579 struct device *dev = &pdata->pdev->dev; 1580 int delay, ret; 1581 1582 ret = device_property_read_u32(dev, "tx-delay", &delay); 1583 if (ret) { 1584 pdata->tx_delay = 4; 1585 return 0; 1586 } 1587 1588 if (delay < 0 || delay > 7) { 1589 dev_err(dev, "Invalid tx-delay specified\n"); 1590 return -EINVAL; 1591 } 1592 1593 pdata->tx_delay = delay; 1594 1595 return 0; 1596 } 1597 1598 static int xgene_get_rx_delay(struct xgene_enet_pdata *pdata) 1599 { 1600 struct device *dev = &pdata->pdev->dev; 1601 int delay, ret; 1602 1603 ret = device_property_read_u32(dev, "rx-delay", &delay); 1604 if (ret) { 1605 pdata->rx_delay = 2; 1606 return 0; 1607 } 1608 1609 if (delay < 0 || delay > 7) { 1610 dev_err(dev, "Invalid rx-delay specified\n"); 1611 return -EINVAL; 1612 } 1613 1614 pdata->rx_delay = delay; 1615 1616 return 0; 1617 } 1618 1619 static int xgene_enet_get_irqs(struct xgene_enet_pdata *pdata) 1620 { 1621 struct platform_device *pdev = pdata->pdev; 1622 int i, ret, max_irqs; 1623 1624 if (phy_interface_mode_is_rgmii(pdata->phy_mode)) 1625 max_irqs = 1; 1626 else if (pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) 1627 max_irqs = 2; 1628 else 1629 max_irqs = XGENE_MAX_ENET_IRQ; 1630 1631 for (i = 0; i < max_irqs; i++) { 1632 ret = platform_get_irq(pdev, i); 1633 if (ret <= 0) { 1634 if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { 1635 max_irqs = i; 1636 pdata->rxq_cnt = max_irqs / 2; 1637 pdata->txq_cnt = max_irqs / 2; 1638 pdata->cq_cnt = max_irqs / 2; 1639 break; 1640 } 1641 return ret ? : -ENXIO; 1642 } 1643 pdata->irqs[i] = ret; 1644 } 1645 1646 return 0; 1647 } 1648 1649 static void xgene_enet_check_phy_handle(struct xgene_enet_pdata *pdata) 1650 { 1651 int ret; 1652 1653 if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) 1654 return; 1655 1656 if (!IS_ENABLED(CONFIG_MDIO_XGENE)) 1657 return; 1658 1659 ret = xgene_enet_phy_connect(pdata->ndev); 1660 if (!ret) 1661 pdata->mdio_driver = true; 1662 } 1663 1664 static void xgene_enet_gpiod_get(struct xgene_enet_pdata *pdata) 1665 { 1666 struct device *dev = &pdata->pdev->dev; 1667 1668 pdata->sfp_gpio_en = false; 1669 if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII || 1670 (!device_property_present(dev, "sfp-gpios") && 1671 !device_property_present(dev, "rxlos-gpios"))) 1672 return; 1673 1674 pdata->sfp_gpio_en = true; 1675 pdata->sfp_rdy = gpiod_get(dev, "rxlos", GPIOD_IN); 1676 if (IS_ERR(pdata->sfp_rdy)) 1677 pdata->sfp_rdy = gpiod_get(dev, "sfp", GPIOD_IN); 1678 } 1679 1680 static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) 1681 { 1682 struct platform_device *pdev; 1683 struct net_device *ndev; 1684 struct device *dev; 1685 struct resource *res; 1686 void __iomem *base_addr; 1687 u32 offset; 1688 int ret = 0; 1689 1690 pdev = pdata->pdev; 1691 dev = &pdev->dev; 1692 ndev = pdata->ndev; 1693 1694 res = platform_get_resource(pdev, IORESOURCE_MEM, RES_ENET_CSR); 1695 if (!res) { 1696 dev_err(dev, "Resource enet_csr not defined\n"); 1697 return -ENODEV; 1698 } 1699 pdata->base_addr = devm_ioremap(dev, res->start, resource_size(res)); 1700 if (!pdata->base_addr) { 1701 dev_err(dev, "Unable to retrieve ENET Port CSR region\n"); 1702 return -ENOMEM; 1703 } 1704 1705 res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CSR); 1706 if (!res) { 1707 dev_err(dev, "Resource ring_csr not defined\n"); 1708 return -ENODEV; 1709 } 1710 pdata->ring_csr_addr = devm_ioremap(dev, res->start, 1711 resource_size(res)); 1712 if (!pdata->ring_csr_addr) { 1713 dev_err(dev, "Unable to retrieve ENET Ring CSR region\n"); 1714 return -ENOMEM; 1715 } 1716 1717 res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CMD); 1718 if (!res) { 1719 dev_err(dev, "Resource ring_cmd not defined\n"); 1720 return -ENODEV; 1721 } 1722 pdata->ring_cmd_addr = devm_ioremap(dev, res->start, 1723 resource_size(res)); 1724 if (!pdata->ring_cmd_addr) { 1725 dev_err(dev, "Unable to retrieve ENET Ring command region\n"); 1726 return -ENOMEM; 1727 } 1728 1729 if (dev->of_node) 1730 xgene_get_port_id_dt(dev, pdata); 1731 #ifdef CONFIG_ACPI 1732 else 1733 xgene_get_port_id_acpi(dev, pdata); 1734 #endif 1735 1736 if (device_get_ethdev_address(dev, ndev)) 1737 eth_hw_addr_random(ndev); 1738 1739 memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); 1740 1741 pdata->phy_mode = device_get_phy_mode(dev); 1742 if (pdata->phy_mode < 0) { 1743 dev_err(dev, "Unable to get phy-connection-type\n"); 1744 return pdata->phy_mode; 1745 } 1746 if (!phy_interface_mode_is_rgmii(pdata->phy_mode) && 1747 pdata->phy_mode != PHY_INTERFACE_MODE_SGMII && 1748 pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) { 1749 dev_err(dev, "Incorrect phy-connection-type specified\n"); 1750 return -ENODEV; 1751 } 1752 1753 ret = xgene_get_tx_delay(pdata); 1754 if (ret) 1755 return ret; 1756 1757 ret = xgene_get_rx_delay(pdata); 1758 if (ret) 1759 return ret; 1760 1761 ret = xgene_enet_get_irqs(pdata); 1762 if (ret) 1763 return ret; 1764 1765 xgene_enet_gpiod_get(pdata); 1766 1767 pdata->clk = devm_clk_get(&pdev->dev, NULL); 1768 if (IS_ERR(pdata->clk)) { 1769 if (pdata->phy_mode != PHY_INTERFACE_MODE_SGMII) { 1770 /* Abort if the clock is defined but couldn't be 1771 * retrived. Always abort if the clock is missing on 1772 * DT system as the driver can't cope with this case. 1773 */ 1774 if (PTR_ERR(pdata->clk) != -ENOENT || dev->of_node) 1775 return PTR_ERR(pdata->clk); 1776 /* Firmware may have set up the clock already. */ 1777 dev_info(dev, "clocks have been setup already\n"); 1778 } 1779 } 1780 1781 if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) 1782 base_addr = pdata->base_addr - (pdata->port_id * MAC_OFFSET); 1783 else 1784 base_addr = pdata->base_addr; 1785 pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET; 1786 pdata->cle.base = base_addr + BLOCK_ETH_CLE_CSR_OFFSET; 1787 pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET; 1788 pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET; 1789 if (phy_interface_mode_is_rgmii(pdata->phy_mode) || 1790 pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) { 1791 pdata->mcx_mac_addr = pdata->base_addr + BLOCK_ETH_MAC_OFFSET; 1792 pdata->mcx_stats_addr = 1793 pdata->base_addr + BLOCK_ETH_STATS_OFFSET; 1794 offset = (pdata->enet_id == XGENE_ENET1) ? 1795 BLOCK_ETH_MAC_CSR_OFFSET : 1796 X2_BLOCK_ETH_MAC_CSR_OFFSET; 1797 pdata->mcx_mac_csr_addr = base_addr + offset; 1798 } else { 1799 pdata->mcx_mac_addr = base_addr + BLOCK_AXG_MAC_OFFSET; 1800 pdata->mcx_stats_addr = base_addr + BLOCK_AXG_STATS_OFFSET; 1801 pdata->mcx_mac_csr_addr = base_addr + BLOCK_AXG_MAC_CSR_OFFSET; 1802 pdata->pcs_addr = base_addr + BLOCK_PCS_OFFSET; 1803 } 1804 pdata->rx_buff_cnt = NUM_PKT_BUF; 1805 1806 return 0; 1807 } 1808 1809 static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata) 1810 { 1811 struct xgene_enet_cle *enet_cle = &pdata->cle; 1812 struct xgene_enet_desc_ring *page_pool; 1813 struct net_device *ndev = pdata->ndev; 1814 struct xgene_enet_desc_ring *buf_pool; 1815 u16 dst_ring_num, ring_id; 1816 int i, ret; 1817 u32 count; 1818 1819 ret = pdata->port_ops->reset(pdata); 1820 if (ret) 1821 return ret; 1822 1823 ret = xgene_enet_create_desc_rings(ndev); 1824 if (ret) { 1825 netdev_err(ndev, "Error in ring configuration\n"); 1826 return ret; 1827 } 1828 1829 /* setup buffer pool */ 1830 for (i = 0; i < pdata->rxq_cnt; i++) { 1831 buf_pool = pdata->rx_ring[i]->buf_pool; 1832 xgene_enet_init_bufpool(buf_pool); 1833 page_pool = pdata->rx_ring[i]->page_pool; 1834 xgene_enet_init_bufpool(page_pool); 1835 1836 count = pdata->rx_buff_cnt; 1837 ret = xgene_enet_refill_bufpool(buf_pool, count); 1838 if (ret) 1839 goto err; 1840 1841 ret = xgene_enet_refill_pagepool(page_pool, count); 1842 if (ret) 1843 goto err; 1844 1845 } 1846 1847 dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring[0]); 1848 buf_pool = pdata->rx_ring[0]->buf_pool; 1849 if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { 1850 /* Initialize and Enable PreClassifier Tree */ 1851 enet_cle->max_nodes = 512; 1852 enet_cle->max_dbptrs = 1024; 1853 enet_cle->parsers = 3; 1854 enet_cle->active_parser = PARSER_ALL; 1855 enet_cle->ptree.start_node = 0; 1856 enet_cle->ptree.start_dbptr = 0; 1857 enet_cle->jump_bytes = 8; 1858 ret = pdata->cle_ops->cle_init(pdata); 1859 if (ret) { 1860 netdev_err(ndev, "Preclass Tree init error\n"); 1861 goto err; 1862 } 1863 1864 } else { 1865 dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring[0]); 1866 buf_pool = pdata->rx_ring[0]->buf_pool; 1867 page_pool = pdata->rx_ring[0]->page_pool; 1868 ring_id = (page_pool) ? page_pool->id : 0; 1869 pdata->port_ops->cle_bypass(pdata, dst_ring_num, 1870 buf_pool->id, ring_id); 1871 } 1872 1873 ndev->max_mtu = XGENE_ENET_MAX_MTU; 1874 pdata->phy_speed = SPEED_UNKNOWN; 1875 pdata->mac_ops->init(pdata); 1876 1877 return ret; 1878 1879 err: 1880 xgene_enet_delete_desc_rings(pdata); 1881 return ret; 1882 } 1883 1884 static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata) 1885 { 1886 switch (pdata->phy_mode) { 1887 case PHY_INTERFACE_MODE_RGMII: 1888 case PHY_INTERFACE_MODE_RGMII_ID: 1889 case PHY_INTERFACE_MODE_RGMII_RXID: 1890 case PHY_INTERFACE_MODE_RGMII_TXID: 1891 pdata->mac_ops = &xgene_gmac_ops; 1892 pdata->port_ops = &xgene_gport_ops; 1893 pdata->rm = RM3; 1894 pdata->rxq_cnt = 1; 1895 pdata->txq_cnt = 1; 1896 pdata->cq_cnt = 0; 1897 break; 1898 case PHY_INTERFACE_MODE_SGMII: 1899 pdata->mac_ops = &xgene_sgmac_ops; 1900 pdata->port_ops = &xgene_sgport_ops; 1901 pdata->rm = RM1; 1902 pdata->rxq_cnt = 1; 1903 pdata->txq_cnt = 1; 1904 pdata->cq_cnt = 1; 1905 break; 1906 default: 1907 pdata->mac_ops = &xgene_xgmac_ops; 1908 pdata->port_ops = &xgene_xgport_ops; 1909 pdata->cle_ops = &xgene_cle3in_ops; 1910 pdata->rm = RM0; 1911 if (!pdata->rxq_cnt) { 1912 pdata->rxq_cnt = XGENE_NUM_RX_RING; 1913 pdata->txq_cnt = XGENE_NUM_TX_RING; 1914 pdata->cq_cnt = XGENE_NUM_TXC_RING; 1915 } 1916 break; 1917 } 1918 1919 if (pdata->enet_id == XGENE_ENET1) { 1920 switch (pdata->port_id) { 1921 case 0: 1922 if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { 1923 pdata->cpu_bufnum = X2_START_CPU_BUFNUM_0; 1924 pdata->eth_bufnum = X2_START_ETH_BUFNUM_0; 1925 pdata->bp_bufnum = X2_START_BP_BUFNUM_0; 1926 pdata->ring_num = START_RING_NUM_0; 1927 } else { 1928 pdata->cpu_bufnum = START_CPU_BUFNUM_0; 1929 pdata->eth_bufnum = START_ETH_BUFNUM_0; 1930 pdata->bp_bufnum = START_BP_BUFNUM_0; 1931 pdata->ring_num = START_RING_NUM_0; 1932 } 1933 break; 1934 case 1: 1935 if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { 1936 pdata->cpu_bufnum = XG_START_CPU_BUFNUM_1; 1937 pdata->eth_bufnum = XG_START_ETH_BUFNUM_1; 1938 pdata->bp_bufnum = XG_START_BP_BUFNUM_1; 1939 pdata->ring_num = XG_START_RING_NUM_1; 1940 } else { 1941 pdata->cpu_bufnum = START_CPU_BUFNUM_1; 1942 pdata->eth_bufnum = START_ETH_BUFNUM_1; 1943 pdata->bp_bufnum = START_BP_BUFNUM_1; 1944 pdata->ring_num = START_RING_NUM_1; 1945 } 1946 break; 1947 default: 1948 break; 1949 } 1950 pdata->ring_ops = &xgene_ring1_ops; 1951 } else { 1952 switch (pdata->port_id) { 1953 case 0: 1954 pdata->cpu_bufnum = X2_START_CPU_BUFNUM_0; 1955 pdata->eth_bufnum = X2_START_ETH_BUFNUM_0; 1956 pdata->bp_bufnum = X2_START_BP_BUFNUM_0; 1957 pdata->ring_num = X2_START_RING_NUM_0; 1958 break; 1959 case 1: 1960 pdata->cpu_bufnum = X2_START_CPU_BUFNUM_1; 1961 pdata->eth_bufnum = X2_START_ETH_BUFNUM_1; 1962 pdata->bp_bufnum = X2_START_BP_BUFNUM_1; 1963 pdata->ring_num = X2_START_RING_NUM_1; 1964 break; 1965 default: 1966 break; 1967 } 1968 pdata->rm = RM0; 1969 pdata->ring_ops = &xgene_ring2_ops; 1970 } 1971 } 1972 1973 static void xgene_enet_napi_add(struct xgene_enet_pdata *pdata) 1974 { 1975 struct napi_struct *napi; 1976 int i; 1977 1978 for (i = 0; i < pdata->rxq_cnt; i++) { 1979 napi = &pdata->rx_ring[i]->napi; 1980 netif_napi_add(pdata->ndev, napi, xgene_enet_napi); 1981 } 1982 1983 for (i = 0; i < pdata->cq_cnt; i++) { 1984 napi = &pdata->tx_ring[i]->cp_ring->napi; 1985 netif_napi_add(pdata->ndev, napi, xgene_enet_napi); 1986 } 1987 } 1988 1989 #ifdef CONFIG_ACPI 1990 static const struct acpi_device_id xgene_enet_acpi_match[] = { 1991 { "APMC0D05", XGENE_ENET1}, 1992 { "APMC0D30", XGENE_ENET1}, 1993 { "APMC0D31", XGENE_ENET1}, 1994 { "APMC0D3F", XGENE_ENET1}, 1995 { "APMC0D26", XGENE_ENET2}, 1996 { "APMC0D25", XGENE_ENET2}, 1997 { } 1998 }; 1999 MODULE_DEVICE_TABLE(acpi, xgene_enet_acpi_match); 2000 #endif 2001 2002 static const struct of_device_id xgene_enet_of_match[] = { 2003 {.compatible = "apm,xgene-enet", .data = (void *)XGENE_ENET1}, 2004 {.compatible = "apm,xgene1-sgenet", .data = (void *)XGENE_ENET1}, 2005 {.compatible = "apm,xgene1-xgenet", .data = (void *)XGENE_ENET1}, 2006 {.compatible = "apm,xgene2-sgenet", .data = (void *)XGENE_ENET2}, 2007 {.compatible = "apm,xgene2-xgenet", .data = (void *)XGENE_ENET2}, 2008 {}, 2009 }; 2010 2011 MODULE_DEVICE_TABLE(of, xgene_enet_of_match); 2012 2013 static int xgene_enet_probe(struct platform_device *pdev) 2014 { 2015 struct net_device *ndev; 2016 struct xgene_enet_pdata *pdata; 2017 struct device *dev = &pdev->dev; 2018 void (*link_state)(struct work_struct *); 2019 const struct of_device_id *of_id; 2020 int ret; 2021 2022 ndev = alloc_etherdev_mqs(sizeof(struct xgene_enet_pdata), 2023 XGENE_NUM_TX_RING, XGENE_NUM_RX_RING); 2024 if (!ndev) 2025 return -ENOMEM; 2026 2027 pdata = netdev_priv(ndev); 2028 2029 pdata->pdev = pdev; 2030 pdata->ndev = ndev; 2031 SET_NETDEV_DEV(ndev, dev); 2032 platform_set_drvdata(pdev, pdata); 2033 ndev->netdev_ops = &xgene_ndev_ops; 2034 xgene_enet_set_ethtool_ops(ndev); 2035 ndev->features |= NETIF_F_IP_CSUM | 2036 NETIF_F_GSO | 2037 NETIF_F_GRO | 2038 NETIF_F_SG; 2039 2040 of_id = of_match_device(xgene_enet_of_match, &pdev->dev); 2041 if (of_id) { 2042 pdata->enet_id = (enum xgene_enet_id)of_id->data; 2043 } 2044 #ifdef CONFIG_ACPI 2045 else { 2046 const struct acpi_device_id *acpi_id; 2047 2048 acpi_id = acpi_match_device(xgene_enet_acpi_match, &pdev->dev); 2049 if (acpi_id) 2050 pdata->enet_id = (enum xgene_enet_id) acpi_id->driver_data; 2051 } 2052 #endif 2053 if (!pdata->enet_id) { 2054 ret = -ENODEV; 2055 goto err; 2056 } 2057 2058 ret = xgene_enet_get_resources(pdata); 2059 if (ret) 2060 goto err; 2061 2062 xgene_enet_setup_ops(pdata); 2063 spin_lock_init(&pdata->mac_lock); 2064 2065 if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { 2066 ndev->features |= NETIF_F_TSO | NETIF_F_RXCSUM; 2067 spin_lock_init(&pdata->mss_lock); 2068 } 2069 ndev->hw_features = ndev->features; 2070 2071 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); 2072 if (ret) { 2073 netdev_err(ndev, "No usable DMA configuration\n"); 2074 goto err; 2075 } 2076 2077 xgene_enet_check_phy_handle(pdata); 2078 2079 ret = xgene_enet_init_hw(pdata); 2080 if (ret) 2081 goto err2; 2082 2083 link_state = pdata->mac_ops->link_state; 2084 if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { 2085 INIT_DELAYED_WORK(&pdata->link_work, link_state); 2086 } else if (!pdata->mdio_driver) { 2087 if (phy_interface_mode_is_rgmii(pdata->phy_mode)) 2088 ret = xgene_enet_mdio_config(pdata); 2089 else 2090 INIT_DELAYED_WORK(&pdata->link_work, link_state); 2091 2092 if (ret) 2093 goto err1; 2094 } 2095 2096 spin_lock_init(&pdata->stats_lock); 2097 ret = xgene_extd_stats_init(pdata); 2098 if (ret) 2099 goto err1; 2100 2101 xgene_enet_napi_add(pdata); 2102 ret = register_netdev(ndev); 2103 if (ret) { 2104 netdev_err(ndev, "Failed to register netdev\n"); 2105 goto err1; 2106 } 2107 2108 return 0; 2109 2110 err1: 2111 /* 2112 * If necessary, free_netdev() will call netif_napi_del() and undo 2113 * the effects of xgene_enet_napi_add()'s calls to netif_napi_add(). 2114 */ 2115 2116 xgene_enet_delete_desc_rings(pdata); 2117 2118 err2: 2119 if (pdata->mdio_driver) 2120 xgene_enet_phy_disconnect(pdata); 2121 else if (phy_interface_mode_is_rgmii(pdata->phy_mode)) 2122 xgene_enet_mdio_remove(pdata); 2123 err: 2124 free_netdev(ndev); 2125 return ret; 2126 } 2127 2128 static int xgene_enet_remove(struct platform_device *pdev) 2129 { 2130 struct xgene_enet_pdata *pdata; 2131 struct net_device *ndev; 2132 2133 pdata = platform_get_drvdata(pdev); 2134 ndev = pdata->ndev; 2135 2136 rtnl_lock(); 2137 if (netif_running(ndev)) 2138 dev_close(ndev); 2139 rtnl_unlock(); 2140 2141 if (pdata->mdio_driver) 2142 xgene_enet_phy_disconnect(pdata); 2143 else if (phy_interface_mode_is_rgmii(pdata->phy_mode)) 2144 xgene_enet_mdio_remove(pdata); 2145 2146 unregister_netdev(ndev); 2147 xgene_enet_delete_desc_rings(pdata); 2148 pdata->port_ops->shutdown(pdata); 2149 free_netdev(ndev); 2150 2151 return 0; 2152 } 2153 2154 static void xgene_enet_shutdown(struct platform_device *pdev) 2155 { 2156 struct xgene_enet_pdata *pdata; 2157 2158 pdata = platform_get_drvdata(pdev); 2159 if (!pdata) 2160 return; 2161 2162 if (!pdata->ndev) 2163 return; 2164 2165 xgene_enet_remove(pdev); 2166 } 2167 2168 static struct platform_driver xgene_enet_driver = { 2169 .driver = { 2170 .name = "xgene-enet", 2171 .of_match_table = of_match_ptr(xgene_enet_of_match), 2172 .acpi_match_table = ACPI_PTR(xgene_enet_acpi_match), 2173 }, 2174 .probe = xgene_enet_probe, 2175 .remove = xgene_enet_remove, 2176 .shutdown = xgene_enet_shutdown, 2177 }; 2178 2179 module_platform_driver(xgene_enet_driver); 2180 2181 MODULE_DESCRIPTION("APM X-Gene SoC Ethernet driver"); 2182 MODULE_AUTHOR("Iyappan Subramanian <isubramanian@apm.com>"); 2183 MODULE_AUTHOR("Keyur Chudgar <kchudgar@apm.com>"); 2184 MODULE_LICENSE("GPL"); 2185