1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Altera Triple-Speed Ethernet MAC driver 3 * Copyright (C) 2008-2014 Altera Corporation. All rights reserved 4 * 5 * Contributors: 6 * Dalon Westergreen 7 * Thomas Chou 8 * Ian Abbott 9 * Yuriy Kozlov 10 * Tobias Klauser 11 * Andriy Smolskyy 12 * Roman Bulgakov 13 * Dmytro Mytarchuk 14 * Matthew Gerlach 15 * 16 * Original driver contributed by SLS. 17 * Major updates contributed by GlobalLogic 18 */ 19 20 #include <linux/atomic.h> 21 #include <linux/delay.h> 22 #include <linux/etherdevice.h> 23 #include <linux/if_vlan.h> 24 #include <linux/init.h> 25 #include <linux/interrupt.h> 26 #include <linux/io.h> 27 #include <linux/kernel.h> 28 #include <linux/module.h> 29 #include <linux/mii.h> 30 #include <linux/mdio/mdio-regmap.h> 31 #include <linux/netdevice.h> 32 #include <linux/of_device.h> 33 #include <linux/of_mdio.h> 34 #include <linux/of_net.h> 35 #include <linux/of_platform.h> 36 #include <linux/pcs-lynx.h> 37 #include <linux/phy.h> 38 #include <linux/platform_device.h> 39 #include <linux/regmap.h> 40 #include <linux/skbuff.h> 41 #include <asm/cacheflush.h> 42 43 #include "altera_utils.h" 44 #include "altera_tse.h" 45 #include "altera_sgdma.h" 46 #include "altera_msgdma.h" 47 48 static atomic_t instance_count = ATOMIC_INIT(~0); 49 /* Module parameters */ 50 static int debug = -1; 51 module_param(debug, int, 0644); 52 MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)"); 53 54 static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 55 NETIF_MSG_LINK | NETIF_MSG_IFUP | 56 NETIF_MSG_IFDOWN); 57 58 #define RX_DESCRIPTORS 64 59 static int dma_rx_num = RX_DESCRIPTORS; 60 module_param(dma_rx_num, int, 0644); 61 MODULE_PARM_DESC(dma_rx_num, "Number of descriptors in the RX list"); 62 63 #define TX_DESCRIPTORS 64 64 static int dma_tx_num = TX_DESCRIPTORS; 65 module_param(dma_tx_num, int, 0644); 66 MODULE_PARM_DESC(dma_tx_num, "Number of descriptors in the TX list"); 67 68 69 #define POLL_PHY (-1) 70 71 /* Make sure DMA buffer size is larger than the max frame size 72 * plus some alignment offset and a VLAN header. If the max frame size is 73 * 1518, a VLAN header would be additional 4 bytes and additional 74 * headroom for alignment is 2 bytes, 2048 is just fine. 75 */ 76 #define ALTERA_RXDMABUFFER_SIZE 2048 77 78 /* Allow network stack to resume queuing packets after we've 79 * finished transmitting at least 1/4 of the packets in the queue. 80 */ 81 #define TSE_TX_THRESH(x) (x->tx_ring_size / 4) 82 83 #define TXQUEUESTOP_THRESHHOLD 2 84 85 static const struct of_device_id altera_tse_ids[]; 86 87 static inline u32 tse_tx_avail(struct altera_tse_private *priv) 88 { 89 return priv->tx_cons + priv->tx_ring_size - priv->tx_prod - 1; 90 } 91 92 /* MDIO specific functions 93 */ 94 static int altera_tse_mdio_read(struct mii_bus *bus, int mii_id, int regnum) 95 { 96 struct net_device *ndev = bus->priv; 97 struct altera_tse_private *priv = netdev_priv(ndev); 98 99 /* set MDIO address */ 100 csrwr32((mii_id & 0x1f), priv->mac_dev, 101 tse_csroffs(mdio_phy1_addr)); 102 103 /* get the data */ 104 return csrrd32(priv->mac_dev, 105 tse_csroffs(mdio_phy1) + regnum * 4) & 0xffff; 106 } 107 108 static int altera_tse_mdio_write(struct mii_bus *bus, int mii_id, int regnum, 109 u16 value) 110 { 111 struct net_device *ndev = bus->priv; 112 struct altera_tse_private *priv = netdev_priv(ndev); 113 114 /* set MDIO address */ 115 csrwr32((mii_id & 0x1f), priv->mac_dev, 116 tse_csroffs(mdio_phy1_addr)); 117 118 /* write the data */ 119 csrwr32(value, priv->mac_dev, tse_csroffs(mdio_phy1) + regnum * 4); 120 return 0; 121 } 122 123 static int altera_tse_mdio_create(struct net_device *dev, unsigned int id) 124 { 125 struct altera_tse_private *priv = netdev_priv(dev); 126 struct device_node *mdio_node = NULL; 127 struct device_node *child_node = NULL; 128 struct mii_bus *mdio = NULL; 129 int ret; 130 131 for_each_child_of_node(priv->device->of_node, child_node) { 132 if (of_device_is_compatible(child_node, "altr,tse-mdio")) { 133 mdio_node = child_node; 134 break; 135 } 136 } 137 138 if (mdio_node) { 139 netdev_dbg(dev, "FOUND MDIO subnode\n"); 140 } else { 141 netdev_dbg(dev, "NO MDIO subnode\n"); 142 return 0; 143 } 144 145 mdio = mdiobus_alloc(); 146 if (mdio == NULL) { 147 netdev_err(dev, "Error allocating MDIO bus\n"); 148 ret = -ENOMEM; 149 goto put_node; 150 } 151 152 mdio->name = ALTERA_TSE_RESOURCE_NAME; 153 mdio->read = &altera_tse_mdio_read; 154 mdio->write = &altera_tse_mdio_write; 155 snprintf(mdio->id, MII_BUS_ID_SIZE, "%s-%u", mdio->name, id); 156 157 mdio->priv = dev; 158 mdio->parent = priv->device; 159 160 ret = of_mdiobus_register(mdio, mdio_node); 161 if (ret != 0) { 162 netdev_err(dev, "Cannot register MDIO bus %s\n", 163 mdio->id); 164 goto out_free_mdio; 165 } 166 of_node_put(mdio_node); 167 168 if (netif_msg_drv(priv)) 169 netdev_info(dev, "MDIO bus %s: created\n", mdio->id); 170 171 priv->mdio = mdio; 172 return 0; 173 out_free_mdio: 174 mdiobus_free(mdio); 175 mdio = NULL; 176 put_node: 177 of_node_put(mdio_node); 178 return ret; 179 } 180 181 static void altera_tse_mdio_destroy(struct net_device *dev) 182 { 183 struct altera_tse_private *priv = netdev_priv(dev); 184 185 if (priv->mdio == NULL) 186 return; 187 188 if (netif_msg_drv(priv)) 189 netdev_info(dev, "MDIO bus %s: removed\n", 190 priv->mdio->id); 191 192 mdiobus_unregister(priv->mdio); 193 mdiobus_free(priv->mdio); 194 priv->mdio = NULL; 195 } 196 197 static int tse_init_rx_buffer(struct altera_tse_private *priv, 198 struct tse_buffer *rxbuffer, int len) 199 { 200 rxbuffer->skb = netdev_alloc_skb_ip_align(priv->dev, len); 201 if (!rxbuffer->skb) 202 return -ENOMEM; 203 204 rxbuffer->dma_addr = dma_map_single(priv->device, rxbuffer->skb->data, 205 len, 206 DMA_FROM_DEVICE); 207 208 if (dma_mapping_error(priv->device, rxbuffer->dma_addr)) { 209 netdev_err(priv->dev, "%s: DMA mapping error\n", __func__); 210 dev_kfree_skb_any(rxbuffer->skb); 211 return -EINVAL; 212 } 213 rxbuffer->dma_addr &= (dma_addr_t)~3; 214 rxbuffer->len = len; 215 return 0; 216 } 217 218 static void tse_free_rx_buffer(struct altera_tse_private *priv, 219 struct tse_buffer *rxbuffer) 220 { 221 dma_addr_t dma_addr = rxbuffer->dma_addr; 222 struct sk_buff *skb = rxbuffer->skb; 223 224 if (skb != NULL) { 225 if (dma_addr) 226 dma_unmap_single(priv->device, dma_addr, 227 rxbuffer->len, 228 DMA_FROM_DEVICE); 229 dev_kfree_skb_any(skb); 230 rxbuffer->skb = NULL; 231 rxbuffer->dma_addr = 0; 232 } 233 } 234 235 /* Unmap and free Tx buffer resources 236 */ 237 static void tse_free_tx_buffer(struct altera_tse_private *priv, 238 struct tse_buffer *buffer) 239 { 240 if (buffer->dma_addr) { 241 if (buffer->mapped_as_page) 242 dma_unmap_page(priv->device, buffer->dma_addr, 243 buffer->len, DMA_TO_DEVICE); 244 else 245 dma_unmap_single(priv->device, buffer->dma_addr, 246 buffer->len, DMA_TO_DEVICE); 247 buffer->dma_addr = 0; 248 } 249 if (buffer->skb) { 250 dev_kfree_skb_any(buffer->skb); 251 buffer->skb = NULL; 252 } 253 } 254 255 static int alloc_init_skbufs(struct altera_tse_private *priv) 256 { 257 unsigned int rx_descs = priv->rx_ring_size; 258 unsigned int tx_descs = priv->tx_ring_size; 259 int ret = -ENOMEM; 260 int i; 261 262 /* Create Rx ring buffer */ 263 priv->rx_ring = kcalloc(rx_descs, sizeof(struct tse_buffer), 264 GFP_KERNEL); 265 if (!priv->rx_ring) 266 goto err_rx_ring; 267 268 /* Create Tx ring buffer */ 269 priv->tx_ring = kcalloc(tx_descs, sizeof(struct tse_buffer), 270 GFP_KERNEL); 271 if (!priv->tx_ring) 272 goto err_tx_ring; 273 274 priv->tx_cons = 0; 275 priv->tx_prod = 0; 276 277 /* Init Rx ring */ 278 for (i = 0; i < rx_descs; i++) { 279 ret = tse_init_rx_buffer(priv, &priv->rx_ring[i], 280 priv->rx_dma_buf_sz); 281 if (ret) 282 goto err_init_rx_buffers; 283 } 284 285 priv->rx_cons = 0; 286 priv->rx_prod = 0; 287 288 return 0; 289 err_init_rx_buffers: 290 while (--i >= 0) 291 tse_free_rx_buffer(priv, &priv->rx_ring[i]); 292 kfree(priv->tx_ring); 293 err_tx_ring: 294 kfree(priv->rx_ring); 295 err_rx_ring: 296 return ret; 297 } 298 299 static void free_skbufs(struct net_device *dev) 300 { 301 struct altera_tse_private *priv = netdev_priv(dev); 302 unsigned int rx_descs = priv->rx_ring_size; 303 unsigned int tx_descs = priv->tx_ring_size; 304 int i; 305 306 /* Release the DMA TX/RX socket buffers */ 307 for (i = 0; i < rx_descs; i++) 308 tse_free_rx_buffer(priv, &priv->rx_ring[i]); 309 for (i = 0; i < tx_descs; i++) 310 tse_free_tx_buffer(priv, &priv->tx_ring[i]); 311 312 313 kfree(priv->tx_ring); 314 } 315 316 /* Reallocate the skb for the reception process 317 */ 318 static inline void tse_rx_refill(struct altera_tse_private *priv) 319 { 320 unsigned int rxsize = priv->rx_ring_size; 321 unsigned int entry; 322 int ret; 323 324 for (; priv->rx_cons - priv->rx_prod > 0; 325 priv->rx_prod++) { 326 entry = priv->rx_prod % rxsize; 327 if (likely(priv->rx_ring[entry].skb == NULL)) { 328 ret = tse_init_rx_buffer(priv, &priv->rx_ring[entry], 329 priv->rx_dma_buf_sz); 330 if (unlikely(ret != 0)) 331 break; 332 priv->dmaops->add_rx_desc(priv, &priv->rx_ring[entry]); 333 } 334 } 335 } 336 337 /* Pull out the VLAN tag and fix up the packet 338 */ 339 static inline void tse_rx_vlan(struct net_device *dev, struct sk_buff *skb) 340 { 341 struct ethhdr *eth_hdr; 342 u16 vid; 343 344 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) && 345 !__vlan_get_tag(skb, &vid)) { 346 eth_hdr = (struct ethhdr *)skb->data; 347 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 348 skb_pull(skb, VLAN_HLEN); 349 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 350 } 351 } 352 353 /* Receive a packet: retrieve and pass over to upper levels 354 */ 355 static int tse_rx(struct altera_tse_private *priv, int limit) 356 { 357 unsigned int entry = priv->rx_cons % priv->rx_ring_size; 358 unsigned int next_entry; 359 unsigned int count = 0; 360 struct sk_buff *skb; 361 u32 rxstatus; 362 u16 pktlength; 363 u16 pktstatus; 364 365 /* Check for count < limit first as get_rx_status is changing 366 * the response-fifo so we must process the next packet 367 * after calling get_rx_status if a response is pending. 368 * (reading the last byte of the response pops the value from the fifo.) 369 */ 370 while ((count < limit) && 371 ((rxstatus = priv->dmaops->get_rx_status(priv)) != 0)) { 372 pktstatus = rxstatus >> 16; 373 pktlength = rxstatus & 0xffff; 374 375 if ((pktstatus & 0xFF) || (pktlength == 0)) 376 netdev_err(priv->dev, 377 "RCV pktstatus %08X pktlength %08X\n", 378 pktstatus, pktlength); 379 380 /* DMA transfer from TSE starts with 2 additional bytes for 381 * IP payload alignment. Status returned by get_rx_status() 382 * contains DMA transfer length. Packet is 2 bytes shorter. 383 */ 384 pktlength -= 2; 385 386 count++; 387 next_entry = (++priv->rx_cons) % priv->rx_ring_size; 388 389 skb = priv->rx_ring[entry].skb; 390 if (unlikely(!skb)) { 391 netdev_err(priv->dev, 392 "%s: Inconsistent Rx descriptor chain\n", 393 __func__); 394 priv->dev->stats.rx_dropped++; 395 break; 396 } 397 priv->rx_ring[entry].skb = NULL; 398 399 skb_put(skb, pktlength); 400 401 dma_unmap_single(priv->device, priv->rx_ring[entry].dma_addr, 402 priv->rx_ring[entry].len, DMA_FROM_DEVICE); 403 404 if (netif_msg_pktdata(priv)) { 405 netdev_info(priv->dev, "frame received %d bytes\n", 406 pktlength); 407 print_hex_dump(KERN_ERR, "data: ", DUMP_PREFIX_OFFSET, 408 16, 1, skb->data, pktlength, true); 409 } 410 411 tse_rx_vlan(priv->dev, skb); 412 413 skb->protocol = eth_type_trans(skb, priv->dev); 414 skb_checksum_none_assert(skb); 415 416 napi_gro_receive(&priv->napi, skb); 417 418 priv->dev->stats.rx_packets++; 419 priv->dev->stats.rx_bytes += pktlength; 420 421 entry = next_entry; 422 423 tse_rx_refill(priv); 424 } 425 426 return count; 427 } 428 429 /* Reclaim resources after transmission completes 430 */ 431 static int tse_tx_complete(struct altera_tse_private *priv) 432 { 433 unsigned int txsize = priv->tx_ring_size; 434 struct tse_buffer *tx_buff; 435 unsigned int entry; 436 int txcomplete = 0; 437 u32 ready; 438 439 spin_lock(&priv->tx_lock); 440 441 ready = priv->dmaops->tx_completions(priv); 442 443 /* Free sent buffers */ 444 while (ready && (priv->tx_cons != priv->tx_prod)) { 445 entry = priv->tx_cons % txsize; 446 tx_buff = &priv->tx_ring[entry]; 447 448 if (netif_msg_tx_done(priv)) 449 netdev_dbg(priv->dev, "%s: curr %d, dirty %d\n", 450 __func__, priv->tx_prod, priv->tx_cons); 451 452 if (likely(tx_buff->skb)) 453 priv->dev->stats.tx_packets++; 454 455 tse_free_tx_buffer(priv, tx_buff); 456 priv->tx_cons++; 457 458 txcomplete++; 459 ready--; 460 } 461 462 if (unlikely(netif_queue_stopped(priv->dev) && 463 tse_tx_avail(priv) > TSE_TX_THRESH(priv))) { 464 if (netif_queue_stopped(priv->dev) && 465 tse_tx_avail(priv) > TSE_TX_THRESH(priv)) { 466 if (netif_msg_tx_done(priv)) 467 netdev_dbg(priv->dev, "%s: restart transmit\n", 468 __func__); 469 netif_wake_queue(priv->dev); 470 } 471 } 472 473 spin_unlock(&priv->tx_lock); 474 return txcomplete; 475 } 476 477 /* NAPI polling function 478 */ 479 static int tse_poll(struct napi_struct *napi, int budget) 480 { 481 struct altera_tse_private *priv = 482 container_of(napi, struct altera_tse_private, napi); 483 unsigned long int flags; 484 int rxcomplete = 0; 485 486 tse_tx_complete(priv); 487 488 rxcomplete = tse_rx(priv, budget); 489 490 if (rxcomplete < budget) { 491 492 napi_complete_done(napi, rxcomplete); 493 494 netdev_dbg(priv->dev, 495 "NAPI Complete, did %d packets with budget %d\n", 496 rxcomplete, budget); 497 498 spin_lock_irqsave(&priv->rxdma_irq_lock, flags); 499 priv->dmaops->enable_rxirq(priv); 500 priv->dmaops->enable_txirq(priv); 501 spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); 502 } 503 return rxcomplete; 504 } 505 506 /* DMA TX & RX FIFO interrupt routing 507 */ 508 static irqreturn_t altera_isr(int irq, void *dev_id) 509 { 510 struct net_device *dev = dev_id; 511 struct altera_tse_private *priv; 512 513 if (unlikely(!dev)) { 514 pr_err("%s: invalid dev pointer\n", __func__); 515 return IRQ_NONE; 516 } 517 priv = netdev_priv(dev); 518 519 spin_lock(&priv->rxdma_irq_lock); 520 /* reset IRQs */ 521 priv->dmaops->clear_rxirq(priv); 522 priv->dmaops->clear_txirq(priv); 523 spin_unlock(&priv->rxdma_irq_lock); 524 525 if (likely(napi_schedule_prep(&priv->napi))) { 526 spin_lock(&priv->rxdma_irq_lock); 527 priv->dmaops->disable_rxirq(priv); 528 priv->dmaops->disable_txirq(priv); 529 spin_unlock(&priv->rxdma_irq_lock); 530 __napi_schedule(&priv->napi); 531 } 532 533 534 return IRQ_HANDLED; 535 } 536 537 /* Transmit a packet (called by the kernel). Dispatches 538 * either the SGDMA method for transmitting or the 539 * MSGDMA method, assumes no scatter/gather support, 540 * implying an assumption that there's only one 541 * physically contiguous fragment starting at 542 * skb->data, for length of skb_headlen(skb). 543 */ 544 static netdev_tx_t tse_start_xmit(struct sk_buff *skb, struct net_device *dev) 545 { 546 struct altera_tse_private *priv = netdev_priv(dev); 547 unsigned int nopaged_len = skb_headlen(skb); 548 unsigned int txsize = priv->tx_ring_size; 549 int nfrags = skb_shinfo(skb)->nr_frags; 550 struct tse_buffer *buffer = NULL; 551 netdev_tx_t ret = NETDEV_TX_OK; 552 dma_addr_t dma_addr; 553 unsigned int entry; 554 555 spin_lock_bh(&priv->tx_lock); 556 557 if (unlikely(tse_tx_avail(priv) < nfrags + 1)) { 558 if (!netif_queue_stopped(dev)) { 559 netif_stop_queue(dev); 560 /* This is a hard error, log it. */ 561 netdev_err(priv->dev, 562 "%s: Tx list full when queue awake\n", 563 __func__); 564 } 565 ret = NETDEV_TX_BUSY; 566 goto out; 567 } 568 569 /* Map the first skb fragment */ 570 entry = priv->tx_prod % txsize; 571 buffer = &priv->tx_ring[entry]; 572 573 dma_addr = dma_map_single(priv->device, skb->data, nopaged_len, 574 DMA_TO_DEVICE); 575 if (dma_mapping_error(priv->device, dma_addr)) { 576 netdev_err(priv->dev, "%s: DMA mapping error\n", __func__); 577 ret = NETDEV_TX_OK; 578 goto out; 579 } 580 581 buffer->skb = skb; 582 buffer->dma_addr = dma_addr; 583 buffer->len = nopaged_len; 584 585 priv->dmaops->tx_buffer(priv, buffer); 586 587 skb_tx_timestamp(skb); 588 589 priv->tx_prod++; 590 dev->stats.tx_bytes += skb->len; 591 592 if (unlikely(tse_tx_avail(priv) <= TXQUEUESTOP_THRESHHOLD)) { 593 if (netif_msg_hw(priv)) 594 netdev_dbg(priv->dev, "%s: stop transmitted packets\n", 595 __func__); 596 netif_stop_queue(dev); 597 } 598 599 out: 600 spin_unlock_bh(&priv->tx_lock); 601 602 return ret; 603 } 604 605 static int altera_tse_phy_get_addr_mdio_create(struct net_device *dev) 606 { 607 struct altera_tse_private *priv = netdev_priv(dev); 608 struct device_node *np = priv->device->of_node; 609 int ret; 610 611 ret = of_get_phy_mode(np, &priv->phy_iface); 612 613 /* Avoid get phy addr and create mdio if no phy is present */ 614 if (ret) 615 return 0; 616 617 /* try to get PHY address from device tree, use PHY autodetection if 618 * no valid address is given 619 */ 620 621 if (of_property_read_u32(priv->device->of_node, "phy-addr", 622 &priv->phy_addr)) { 623 priv->phy_addr = POLL_PHY; 624 } 625 626 if (!((priv->phy_addr == POLL_PHY) || 627 ((priv->phy_addr >= 0) && (priv->phy_addr < PHY_MAX_ADDR)))) { 628 netdev_err(dev, "invalid phy-addr specified %d\n", 629 priv->phy_addr); 630 return -ENODEV; 631 } 632 633 /* Create/attach to MDIO bus */ 634 ret = altera_tse_mdio_create(dev, 635 atomic_add_return(1, &instance_count)); 636 637 if (ret) 638 return -ENODEV; 639 640 return 0; 641 } 642 643 static void tse_update_mac_addr(struct altera_tse_private *priv, const u8 *addr) 644 { 645 u32 msb; 646 u32 lsb; 647 648 msb = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0]; 649 lsb = ((addr[5] << 8) | addr[4]) & 0xffff; 650 651 /* Set primary MAC address */ 652 csrwr32(msb, priv->mac_dev, tse_csroffs(mac_addr_0)); 653 csrwr32(lsb, priv->mac_dev, tse_csroffs(mac_addr_1)); 654 } 655 656 /* MAC software reset. 657 * When reset is triggered, the MAC function completes the current 658 * transmission or reception, and subsequently disables the transmit and 659 * receive logic, flushes the receive FIFO buffer, and resets the statistics 660 * counters. 661 */ 662 static int reset_mac(struct altera_tse_private *priv) 663 { 664 int counter; 665 u32 dat; 666 667 dat = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 668 dat &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA); 669 dat |= MAC_CMDCFG_SW_RESET | MAC_CMDCFG_CNT_RESET; 670 csrwr32(dat, priv->mac_dev, tse_csroffs(command_config)); 671 672 counter = 0; 673 while (counter++ < ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) { 674 if (tse_bit_is_clear(priv->mac_dev, tse_csroffs(command_config), 675 MAC_CMDCFG_SW_RESET)) 676 break; 677 udelay(1); 678 } 679 680 if (counter >= ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) { 681 dat = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 682 dat &= ~MAC_CMDCFG_SW_RESET; 683 csrwr32(dat, priv->mac_dev, tse_csroffs(command_config)); 684 return -1; 685 } 686 return 0; 687 } 688 689 /* Initialize MAC core registers 690 */ 691 static int init_mac(struct altera_tse_private *priv) 692 { 693 unsigned int cmd = 0; 694 u32 frm_length; 695 696 /* Setup Rx FIFO */ 697 csrwr32(priv->rx_fifo_depth - ALTERA_TSE_RX_SECTION_EMPTY, 698 priv->mac_dev, tse_csroffs(rx_section_empty)); 699 700 csrwr32(ALTERA_TSE_RX_SECTION_FULL, priv->mac_dev, 701 tse_csroffs(rx_section_full)); 702 703 csrwr32(ALTERA_TSE_RX_ALMOST_EMPTY, priv->mac_dev, 704 tse_csroffs(rx_almost_empty)); 705 706 csrwr32(ALTERA_TSE_RX_ALMOST_FULL, priv->mac_dev, 707 tse_csroffs(rx_almost_full)); 708 709 /* Setup Tx FIFO */ 710 csrwr32(priv->tx_fifo_depth - ALTERA_TSE_TX_SECTION_EMPTY, 711 priv->mac_dev, tse_csroffs(tx_section_empty)); 712 713 csrwr32(ALTERA_TSE_TX_SECTION_FULL, priv->mac_dev, 714 tse_csroffs(tx_section_full)); 715 716 csrwr32(ALTERA_TSE_TX_ALMOST_EMPTY, priv->mac_dev, 717 tse_csroffs(tx_almost_empty)); 718 719 csrwr32(ALTERA_TSE_TX_ALMOST_FULL, priv->mac_dev, 720 tse_csroffs(tx_almost_full)); 721 722 /* MAC Address Configuration */ 723 tse_update_mac_addr(priv, priv->dev->dev_addr); 724 725 /* MAC Function Configuration */ 726 frm_length = ETH_HLEN + priv->dev->mtu + ETH_FCS_LEN; 727 csrwr32(frm_length, priv->mac_dev, tse_csroffs(frm_length)); 728 729 csrwr32(ALTERA_TSE_TX_IPG_LENGTH, priv->mac_dev, 730 tse_csroffs(tx_ipg_length)); 731 732 /* Disable RX/TX shift 16 for alignment of all received frames on 16-bit 733 * start address 734 */ 735 tse_set_bit(priv->mac_dev, tse_csroffs(rx_cmd_stat), 736 ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16); 737 738 tse_clear_bit(priv->mac_dev, tse_csroffs(tx_cmd_stat), 739 ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 | 740 ALTERA_TSE_TX_CMD_STAT_OMIT_CRC); 741 742 /* Set the MAC options */ 743 cmd = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 744 cmd &= ~MAC_CMDCFG_PAD_EN; /* No padding Removal on Receive */ 745 cmd &= ~MAC_CMDCFG_CRC_FWD; /* CRC Removal */ 746 cmd |= MAC_CMDCFG_RX_ERR_DISC; /* Automatically discard frames 747 * with CRC errors 748 */ 749 cmd |= MAC_CMDCFG_CNTL_FRM_ENA; 750 cmd &= ~MAC_CMDCFG_TX_ENA; 751 cmd &= ~MAC_CMDCFG_RX_ENA; 752 753 /* Default speed and duplex setting, full/100 */ 754 cmd &= ~MAC_CMDCFG_HD_ENA; 755 cmd &= ~MAC_CMDCFG_ETH_SPEED; 756 cmd &= ~MAC_CMDCFG_ENA_10; 757 758 csrwr32(cmd, priv->mac_dev, tse_csroffs(command_config)); 759 760 csrwr32(ALTERA_TSE_PAUSE_QUANTA, priv->mac_dev, 761 tse_csroffs(pause_quanta)); 762 763 if (netif_msg_hw(priv)) 764 dev_dbg(priv->device, 765 "MAC post-initialization: CMD_CONFIG = 0x%08x\n", cmd); 766 767 return 0; 768 } 769 770 /* Start/stop MAC transmission logic 771 */ 772 static void tse_set_mac(struct altera_tse_private *priv, bool enable) 773 { 774 u32 value = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 775 776 if (enable) 777 value |= MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA; 778 else 779 value &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA); 780 781 csrwr32(value, priv->mac_dev, tse_csroffs(command_config)); 782 } 783 784 /* Change the MTU 785 */ 786 static int tse_change_mtu(struct net_device *dev, int new_mtu) 787 { 788 if (netif_running(dev)) { 789 netdev_err(dev, "must be stopped to change its MTU\n"); 790 return -EBUSY; 791 } 792 793 dev->mtu = new_mtu; 794 netdev_update_features(dev); 795 796 return 0; 797 } 798 799 static void altera_tse_set_mcfilter(struct net_device *dev) 800 { 801 struct altera_tse_private *priv = netdev_priv(dev); 802 struct netdev_hw_addr *ha; 803 int i; 804 805 /* clear the hash filter */ 806 for (i = 0; i < 64; i++) 807 csrwr32(0, priv->mac_dev, tse_csroffs(hash_table) + i * 4); 808 809 netdev_for_each_mc_addr(ha, dev) { 810 unsigned int hash = 0; 811 int mac_octet; 812 813 for (mac_octet = 5; mac_octet >= 0; mac_octet--) { 814 unsigned char xor_bit = 0; 815 unsigned char octet = ha->addr[mac_octet]; 816 unsigned int bitshift; 817 818 for (bitshift = 0; bitshift < 8; bitshift++) 819 xor_bit ^= ((octet >> bitshift) & 0x01); 820 821 hash = (hash << 1) | xor_bit; 822 } 823 csrwr32(1, priv->mac_dev, tse_csroffs(hash_table) + hash * 4); 824 } 825 } 826 827 828 static void altera_tse_set_mcfilterall(struct net_device *dev) 829 { 830 struct altera_tse_private *priv = netdev_priv(dev); 831 int i; 832 833 /* set the hash filter */ 834 for (i = 0; i < 64; i++) 835 csrwr32(1, priv->mac_dev, tse_csroffs(hash_table) + i * 4); 836 } 837 838 /* Set or clear the multicast filter for this adapter 839 */ 840 static void tse_set_rx_mode_hashfilter(struct net_device *dev) 841 { 842 struct altera_tse_private *priv = netdev_priv(dev); 843 844 spin_lock(&priv->mac_cfg_lock); 845 846 if (dev->flags & IFF_PROMISC) 847 tse_set_bit(priv->mac_dev, tse_csroffs(command_config), 848 MAC_CMDCFG_PROMIS_EN); 849 850 if (dev->flags & IFF_ALLMULTI) 851 altera_tse_set_mcfilterall(dev); 852 else 853 altera_tse_set_mcfilter(dev); 854 855 spin_unlock(&priv->mac_cfg_lock); 856 } 857 858 /* Set or clear the multicast filter for this adapter 859 */ 860 static void tse_set_rx_mode(struct net_device *dev) 861 { 862 struct altera_tse_private *priv = netdev_priv(dev); 863 864 spin_lock(&priv->mac_cfg_lock); 865 866 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || 867 !netdev_mc_empty(dev) || !netdev_uc_empty(dev)) 868 tse_set_bit(priv->mac_dev, tse_csroffs(command_config), 869 MAC_CMDCFG_PROMIS_EN); 870 else 871 tse_clear_bit(priv->mac_dev, tse_csroffs(command_config), 872 MAC_CMDCFG_PROMIS_EN); 873 874 spin_unlock(&priv->mac_cfg_lock); 875 } 876 877 /* Open and initialize the interface 878 */ 879 static int tse_open(struct net_device *dev) 880 { 881 struct altera_tse_private *priv = netdev_priv(dev); 882 unsigned long flags; 883 int ret = 0; 884 int i; 885 886 /* Reset and configure TSE MAC and probe associated PHY */ 887 ret = priv->dmaops->init_dma(priv); 888 if (ret != 0) { 889 netdev_err(dev, "Cannot initialize DMA\n"); 890 goto phy_error; 891 } 892 893 if (netif_msg_ifup(priv)) 894 netdev_warn(dev, "device MAC address %pM\n", 895 dev->dev_addr); 896 897 if ((priv->revision < 0xd00) || (priv->revision > 0xe00)) 898 netdev_warn(dev, "TSE revision %x\n", priv->revision); 899 900 spin_lock(&priv->mac_cfg_lock); 901 902 ret = reset_mac(priv); 903 /* Note that reset_mac will fail if the clocks are gated by the PHY 904 * due to the PHY being put into isolation or power down mode. 905 * This is not an error if reset fails due to no clock. 906 */ 907 if (ret) 908 netdev_dbg(dev, "Cannot reset MAC core (error: %d)\n", ret); 909 910 ret = init_mac(priv); 911 spin_unlock(&priv->mac_cfg_lock); 912 if (ret) { 913 netdev_err(dev, "Cannot init MAC core (error: %d)\n", ret); 914 goto alloc_skbuf_error; 915 } 916 917 priv->dmaops->reset_dma(priv); 918 919 /* Create and initialize the TX/RX descriptors chains. */ 920 priv->rx_ring_size = dma_rx_num; 921 priv->tx_ring_size = dma_tx_num; 922 ret = alloc_init_skbufs(priv); 923 if (ret) { 924 netdev_err(dev, "DMA descriptors initialization failed\n"); 925 goto alloc_skbuf_error; 926 } 927 928 929 /* Register RX interrupt */ 930 ret = request_irq(priv->rx_irq, altera_isr, IRQF_SHARED, 931 dev->name, dev); 932 if (ret) { 933 netdev_err(dev, "Unable to register RX interrupt %d\n", 934 priv->rx_irq); 935 goto init_error; 936 } 937 938 /* Register TX interrupt */ 939 ret = request_irq(priv->tx_irq, altera_isr, IRQF_SHARED, 940 dev->name, dev); 941 if (ret) { 942 netdev_err(dev, "Unable to register TX interrupt %d\n", 943 priv->tx_irq); 944 goto tx_request_irq_error; 945 } 946 947 /* Enable DMA interrupts */ 948 spin_lock_irqsave(&priv->rxdma_irq_lock, flags); 949 priv->dmaops->enable_rxirq(priv); 950 priv->dmaops->enable_txirq(priv); 951 952 /* Setup RX descriptor chain */ 953 for (i = 0; i < priv->rx_ring_size; i++) 954 priv->dmaops->add_rx_desc(priv, &priv->rx_ring[i]); 955 956 spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); 957 958 ret = phylink_of_phy_connect(priv->phylink, priv->device->of_node, 0); 959 if (ret) { 960 netdev_err(dev, "could not connect phylink (%d)\n", ret); 961 goto tx_request_irq_error; 962 } 963 phylink_start(priv->phylink); 964 965 napi_enable(&priv->napi); 966 netif_start_queue(dev); 967 968 priv->dmaops->start_rxdma(priv); 969 970 /* Start MAC Rx/Tx */ 971 spin_lock(&priv->mac_cfg_lock); 972 tse_set_mac(priv, true); 973 spin_unlock(&priv->mac_cfg_lock); 974 975 return 0; 976 977 tx_request_irq_error: 978 free_irq(priv->rx_irq, dev); 979 init_error: 980 free_skbufs(dev); 981 alloc_skbuf_error: 982 phy_error: 983 return ret; 984 } 985 986 /* Stop TSE MAC interface and put the device in an inactive state 987 */ 988 static int tse_shutdown(struct net_device *dev) 989 { 990 struct altera_tse_private *priv = netdev_priv(dev); 991 unsigned long int flags; 992 int ret; 993 994 phylink_stop(priv->phylink); 995 phylink_disconnect_phy(priv->phylink); 996 netif_stop_queue(dev); 997 napi_disable(&priv->napi); 998 999 /* Disable DMA interrupts */ 1000 spin_lock_irqsave(&priv->rxdma_irq_lock, flags); 1001 priv->dmaops->disable_rxirq(priv); 1002 priv->dmaops->disable_txirq(priv); 1003 spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); 1004 1005 /* Free the IRQ lines */ 1006 free_irq(priv->rx_irq, dev); 1007 free_irq(priv->tx_irq, dev); 1008 1009 /* disable and reset the MAC, empties fifo */ 1010 spin_lock(&priv->mac_cfg_lock); 1011 spin_lock(&priv->tx_lock); 1012 1013 ret = reset_mac(priv); 1014 /* Note that reset_mac will fail if the clocks are gated by the PHY 1015 * due to the PHY being put into isolation or power down mode. 1016 * This is not an error if reset fails due to no clock. 1017 */ 1018 if (ret) 1019 netdev_dbg(dev, "Cannot reset MAC core (error: %d)\n", ret); 1020 priv->dmaops->reset_dma(priv); 1021 free_skbufs(dev); 1022 1023 spin_unlock(&priv->tx_lock); 1024 spin_unlock(&priv->mac_cfg_lock); 1025 1026 priv->dmaops->uninit_dma(priv); 1027 1028 return 0; 1029 } 1030 1031 static struct net_device_ops altera_tse_netdev_ops = { 1032 .ndo_open = tse_open, 1033 .ndo_stop = tse_shutdown, 1034 .ndo_start_xmit = tse_start_xmit, 1035 .ndo_set_mac_address = eth_mac_addr, 1036 .ndo_set_rx_mode = tse_set_rx_mode, 1037 .ndo_change_mtu = tse_change_mtu, 1038 .ndo_validate_addr = eth_validate_addr, 1039 }; 1040 1041 static void alt_tse_mac_config(struct phylink_config *config, unsigned int mode, 1042 const struct phylink_link_state *state) 1043 { 1044 struct net_device *ndev = to_net_dev(config->dev); 1045 struct altera_tse_private *priv = netdev_priv(ndev); 1046 1047 spin_lock(&priv->mac_cfg_lock); 1048 reset_mac(priv); 1049 tse_set_mac(priv, true); 1050 spin_unlock(&priv->mac_cfg_lock); 1051 } 1052 1053 static void alt_tse_mac_link_down(struct phylink_config *config, 1054 unsigned int mode, phy_interface_t interface) 1055 { 1056 } 1057 1058 static void alt_tse_mac_link_up(struct phylink_config *config, 1059 struct phy_device *phy, unsigned int mode, 1060 phy_interface_t interface, int speed, 1061 int duplex, bool tx_pause, bool rx_pause) 1062 { 1063 struct net_device *ndev = to_net_dev(config->dev); 1064 struct altera_tse_private *priv = netdev_priv(ndev); 1065 u32 ctrl; 1066 1067 ctrl = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 1068 ctrl &= ~(MAC_CMDCFG_ENA_10 | MAC_CMDCFG_ETH_SPEED | MAC_CMDCFG_HD_ENA); 1069 1070 if (duplex == DUPLEX_HALF) 1071 ctrl |= MAC_CMDCFG_HD_ENA; 1072 1073 if (speed == SPEED_1000) 1074 ctrl |= MAC_CMDCFG_ETH_SPEED; 1075 else if (speed == SPEED_10) 1076 ctrl |= MAC_CMDCFG_ENA_10; 1077 1078 spin_lock(&priv->mac_cfg_lock); 1079 csrwr32(ctrl, priv->mac_dev, tse_csroffs(command_config)); 1080 spin_unlock(&priv->mac_cfg_lock); 1081 } 1082 1083 static struct phylink_pcs *alt_tse_select_pcs(struct phylink_config *config, 1084 phy_interface_t interface) 1085 { 1086 struct net_device *ndev = to_net_dev(config->dev); 1087 struct altera_tse_private *priv = netdev_priv(ndev); 1088 1089 if (interface == PHY_INTERFACE_MODE_SGMII || 1090 interface == PHY_INTERFACE_MODE_1000BASEX) 1091 return priv->pcs; 1092 else 1093 return NULL; 1094 } 1095 1096 static const struct phylink_mac_ops alt_tse_phylink_ops = { 1097 .mac_config = alt_tse_mac_config, 1098 .mac_link_down = alt_tse_mac_link_down, 1099 .mac_link_up = alt_tse_mac_link_up, 1100 .mac_select_pcs = alt_tse_select_pcs, 1101 }; 1102 1103 static int request_and_map(struct platform_device *pdev, const char *name, 1104 struct resource **res, void __iomem **ptr) 1105 { 1106 struct device *device = &pdev->dev; 1107 struct resource *region; 1108 1109 *res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); 1110 if (*res == NULL) { 1111 dev_err(device, "resource %s not defined\n", name); 1112 return -ENODEV; 1113 } 1114 1115 region = devm_request_mem_region(device, (*res)->start, 1116 resource_size(*res), dev_name(device)); 1117 if (region == NULL) { 1118 dev_err(device, "unable to request %s\n", name); 1119 return -EBUSY; 1120 } 1121 1122 *ptr = devm_ioremap(device, region->start, 1123 resource_size(region)); 1124 if (*ptr == NULL) { 1125 dev_err(device, "ioremap of %s failed!", name); 1126 return -ENOMEM; 1127 } 1128 1129 return 0; 1130 } 1131 1132 /* Probe Altera TSE MAC device 1133 */ 1134 static int altera_tse_probe(struct platform_device *pdev) 1135 { 1136 const struct of_device_id *of_id = NULL; 1137 struct regmap_config pcs_regmap_cfg; 1138 struct altera_tse_private *priv; 1139 struct mdio_regmap_config mrc; 1140 struct resource *control_port; 1141 struct regmap *pcs_regmap; 1142 struct resource *dma_res; 1143 struct resource *pcs_res; 1144 struct mii_bus *pcs_bus; 1145 struct net_device *ndev; 1146 void __iomem *descmap; 1147 int ret = -ENODEV; 1148 1149 ndev = alloc_etherdev(sizeof(struct altera_tse_private)); 1150 if (!ndev) { 1151 dev_err(&pdev->dev, "Could not allocate network device\n"); 1152 return -ENODEV; 1153 } 1154 1155 SET_NETDEV_DEV(ndev, &pdev->dev); 1156 1157 priv = netdev_priv(ndev); 1158 priv->device = &pdev->dev; 1159 priv->dev = ndev; 1160 priv->msg_enable = netif_msg_init(debug, default_msg_level); 1161 1162 of_id = of_match_device(altera_tse_ids, &pdev->dev); 1163 1164 if (of_id) 1165 priv->dmaops = (struct altera_dmaops *)of_id->data; 1166 1167 1168 if (priv->dmaops && 1169 priv->dmaops->altera_dtype == ALTERA_DTYPE_SGDMA) { 1170 /* Get the mapped address to the SGDMA descriptor memory */ 1171 ret = request_and_map(pdev, "s1", &dma_res, &descmap); 1172 if (ret) 1173 goto err_free_netdev; 1174 1175 /* Start of that memory is for transmit descriptors */ 1176 priv->tx_dma_desc = descmap; 1177 1178 /* First half is for tx descriptors, other half for tx */ 1179 priv->txdescmem = resource_size(dma_res)/2; 1180 1181 priv->txdescmem_busaddr = (dma_addr_t)dma_res->start; 1182 1183 priv->rx_dma_desc = (void __iomem *)((uintptr_t)(descmap + 1184 priv->txdescmem)); 1185 priv->rxdescmem = resource_size(dma_res)/2; 1186 priv->rxdescmem_busaddr = dma_res->start; 1187 priv->rxdescmem_busaddr += priv->txdescmem; 1188 1189 if (upper_32_bits(priv->rxdescmem_busaddr)) { 1190 dev_dbg(priv->device, 1191 "SGDMA bus addresses greater than 32-bits\n"); 1192 ret = -EINVAL; 1193 goto err_free_netdev; 1194 } 1195 if (upper_32_bits(priv->txdescmem_busaddr)) { 1196 dev_dbg(priv->device, 1197 "SGDMA bus addresses greater than 32-bits\n"); 1198 ret = -EINVAL; 1199 goto err_free_netdev; 1200 } 1201 } else if (priv->dmaops && 1202 priv->dmaops->altera_dtype == ALTERA_DTYPE_MSGDMA) { 1203 ret = request_and_map(pdev, "rx_resp", &dma_res, 1204 &priv->rx_dma_resp); 1205 if (ret) 1206 goto err_free_netdev; 1207 1208 ret = request_and_map(pdev, "tx_desc", &dma_res, 1209 &priv->tx_dma_desc); 1210 if (ret) 1211 goto err_free_netdev; 1212 1213 priv->txdescmem = resource_size(dma_res); 1214 priv->txdescmem_busaddr = dma_res->start; 1215 1216 ret = request_and_map(pdev, "rx_desc", &dma_res, 1217 &priv->rx_dma_desc); 1218 if (ret) 1219 goto err_free_netdev; 1220 1221 priv->rxdescmem = resource_size(dma_res); 1222 priv->rxdescmem_busaddr = dma_res->start; 1223 1224 } else { 1225 ret = -ENODEV; 1226 goto err_free_netdev; 1227 } 1228 1229 if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask))) { 1230 dma_set_coherent_mask(priv->device, 1231 DMA_BIT_MASK(priv->dmaops->dmamask)); 1232 } else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32))) { 1233 dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32)); 1234 } else { 1235 ret = -EIO; 1236 goto err_free_netdev; 1237 } 1238 1239 /* MAC address space */ 1240 ret = request_and_map(pdev, "control_port", &control_port, 1241 (void __iomem **)&priv->mac_dev); 1242 if (ret) 1243 goto err_free_netdev; 1244 1245 /* xSGDMA Rx Dispatcher address space */ 1246 ret = request_and_map(pdev, "rx_csr", &dma_res, 1247 &priv->rx_dma_csr); 1248 if (ret) 1249 goto err_free_netdev; 1250 1251 1252 /* xSGDMA Tx Dispatcher address space */ 1253 ret = request_and_map(pdev, "tx_csr", &dma_res, 1254 &priv->tx_dma_csr); 1255 if (ret) 1256 goto err_free_netdev; 1257 1258 memset(&pcs_regmap_cfg, 0, sizeof(pcs_regmap_cfg)); 1259 memset(&mrc, 0, sizeof(mrc)); 1260 /* SGMII PCS address space. The location can vary depending on how the 1261 * IP is integrated. We can have a resource dedicated to it at a specific 1262 * address space, but if it's not the case, we fallback to the mdiophy0 1263 * from the MAC's address space 1264 */ 1265 ret = request_and_map(pdev, "pcs", &pcs_res, &priv->pcs_base); 1266 if (ret) { 1267 /* If we can't find a dedicated resource for the PCS, fallback 1268 * to the internal PCS, that has a different address stride 1269 */ 1270 priv->pcs_base = priv->mac_dev + tse_csroffs(mdio_phy0); 1271 pcs_regmap_cfg.reg_bits = 32; 1272 /* Values are MDIO-like values, on 16 bits */ 1273 pcs_regmap_cfg.val_bits = 16; 1274 pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(2); 1275 } else { 1276 pcs_regmap_cfg.reg_bits = 16; 1277 pcs_regmap_cfg.val_bits = 16; 1278 pcs_regmap_cfg.reg_shift = REGMAP_UPSHIFT(1); 1279 } 1280 1281 /* Create a regmap for the PCS so that it can be used by the PCS driver */ 1282 pcs_regmap = devm_regmap_init_mmio(&pdev->dev, priv->pcs_base, 1283 &pcs_regmap_cfg); 1284 if (IS_ERR(pcs_regmap)) { 1285 ret = PTR_ERR(pcs_regmap); 1286 goto err_free_netdev; 1287 } 1288 mrc.regmap = pcs_regmap; 1289 mrc.parent = &pdev->dev; 1290 mrc.valid_addr = 0x0; 1291 mrc.autoscan = false; 1292 1293 /* Rx IRQ */ 1294 priv->rx_irq = platform_get_irq_byname(pdev, "rx_irq"); 1295 if (priv->rx_irq == -ENXIO) { 1296 dev_err(&pdev->dev, "cannot obtain Rx IRQ\n"); 1297 ret = -ENXIO; 1298 goto err_free_netdev; 1299 } 1300 1301 /* Tx IRQ */ 1302 priv->tx_irq = platform_get_irq_byname(pdev, "tx_irq"); 1303 if (priv->tx_irq == -ENXIO) { 1304 dev_err(&pdev->dev, "cannot obtain Tx IRQ\n"); 1305 ret = -ENXIO; 1306 goto err_free_netdev; 1307 } 1308 1309 /* get FIFO depths from device tree */ 1310 if (of_property_read_u32(pdev->dev.of_node, "rx-fifo-depth", 1311 &priv->rx_fifo_depth)) { 1312 dev_err(&pdev->dev, "cannot obtain rx-fifo-depth\n"); 1313 ret = -ENXIO; 1314 goto err_free_netdev; 1315 } 1316 1317 if (of_property_read_u32(pdev->dev.of_node, "tx-fifo-depth", 1318 &priv->tx_fifo_depth)) { 1319 dev_err(&pdev->dev, "cannot obtain tx-fifo-depth\n"); 1320 ret = -ENXIO; 1321 goto err_free_netdev; 1322 } 1323 1324 /* get hash filter settings for this instance */ 1325 priv->hash_filter = 1326 of_property_read_bool(pdev->dev.of_node, 1327 "altr,has-hash-multicast-filter"); 1328 1329 /* Set hash filter to not set for now until the 1330 * multicast filter receive issue is debugged 1331 */ 1332 priv->hash_filter = 0; 1333 1334 /* get supplemental address settings for this instance */ 1335 priv->added_unicast = 1336 of_property_read_bool(pdev->dev.of_node, 1337 "altr,has-supplementary-unicast"); 1338 1339 priv->dev->min_mtu = ETH_ZLEN + ETH_FCS_LEN; 1340 /* Max MTU is 1500, ETH_DATA_LEN */ 1341 priv->dev->max_mtu = ETH_DATA_LEN; 1342 1343 /* Get the max mtu from the device tree. Note that the 1344 * "max-frame-size" parameter is actually max mtu. Definition 1345 * in the ePAPR v1.1 spec and usage differ, so go with usage. 1346 */ 1347 of_property_read_u32(pdev->dev.of_node, "max-frame-size", 1348 &priv->dev->max_mtu); 1349 1350 /* The DMA buffer size already accounts for an alignment bias 1351 * to avoid unaligned access exceptions for the NIOS processor, 1352 */ 1353 priv->rx_dma_buf_sz = ALTERA_RXDMABUFFER_SIZE; 1354 1355 /* get default MAC address from device tree */ 1356 ret = of_get_ethdev_address(pdev->dev.of_node, ndev); 1357 if (ret) 1358 eth_hw_addr_random(ndev); 1359 1360 /* get phy addr and create mdio */ 1361 ret = altera_tse_phy_get_addr_mdio_create(ndev); 1362 1363 if (ret) 1364 goto err_free_netdev; 1365 1366 /* initialize netdev */ 1367 ndev->mem_start = control_port->start; 1368 ndev->mem_end = control_port->end; 1369 ndev->netdev_ops = &altera_tse_netdev_ops; 1370 altera_tse_set_ethtool_ops(ndev); 1371 1372 altera_tse_netdev_ops.ndo_set_rx_mode = tse_set_rx_mode; 1373 1374 if (priv->hash_filter) 1375 altera_tse_netdev_ops.ndo_set_rx_mode = 1376 tse_set_rx_mode_hashfilter; 1377 1378 /* Scatter/gather IO is not supported, 1379 * so it is turned off 1380 */ 1381 ndev->hw_features &= ~NETIF_F_SG; 1382 ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA; 1383 1384 /* VLAN offloading of tagging, stripping and filtering is not 1385 * supported by hardware, but driver will accommodate the 1386 * extra 4-byte VLAN tag for processing by upper layers 1387 */ 1388 ndev->features |= NETIF_F_HW_VLAN_CTAG_RX; 1389 1390 /* setup NAPI interface */ 1391 netif_napi_add(ndev, &priv->napi, tse_poll); 1392 1393 spin_lock_init(&priv->mac_cfg_lock); 1394 spin_lock_init(&priv->tx_lock); 1395 spin_lock_init(&priv->rxdma_irq_lock); 1396 1397 netif_carrier_off(ndev); 1398 ret = register_netdev(ndev); 1399 if (ret) { 1400 dev_err(&pdev->dev, "failed to register TSE net device\n"); 1401 goto err_register_netdev; 1402 } 1403 1404 platform_set_drvdata(pdev, ndev); 1405 1406 priv->revision = ioread32(&priv->mac_dev->megacore_revision); 1407 1408 if (netif_msg_probe(priv)) 1409 dev_info(&pdev->dev, "Altera TSE MAC version %d.%d at 0x%08lx irq %d/%d\n", 1410 (priv->revision >> 8) & 0xff, 1411 priv->revision & 0xff, 1412 (unsigned long) control_port->start, priv->rx_irq, 1413 priv->tx_irq); 1414 1415 snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-pcs-mii", ndev->name); 1416 pcs_bus = devm_mdio_regmap_register(&pdev->dev, &mrc); 1417 if (IS_ERR(pcs_bus)) { 1418 ret = PTR_ERR(pcs_bus); 1419 goto err_init_pcs; 1420 } 1421 1422 priv->pcs = lynx_pcs_create_mdiodev(pcs_bus, 0); 1423 if (IS_ERR(priv->pcs)) { 1424 ret = PTR_ERR(priv->pcs); 1425 goto err_init_pcs; 1426 } 1427 1428 priv->phylink_config.dev = &ndev->dev; 1429 priv->phylink_config.type = PHYLINK_NETDEV; 1430 priv->phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_10 | 1431 MAC_100 | MAC_1000FD; 1432 1433 phy_interface_set_rgmii(priv->phylink_config.supported_interfaces); 1434 __set_bit(PHY_INTERFACE_MODE_MII, 1435 priv->phylink_config.supported_interfaces); 1436 __set_bit(PHY_INTERFACE_MODE_GMII, 1437 priv->phylink_config.supported_interfaces); 1438 __set_bit(PHY_INTERFACE_MODE_SGMII, 1439 priv->phylink_config.supported_interfaces); 1440 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 1441 priv->phylink_config.supported_interfaces); 1442 1443 priv->phylink = phylink_create(&priv->phylink_config, 1444 of_fwnode_handle(priv->device->of_node), 1445 priv->phy_iface, &alt_tse_phylink_ops); 1446 if (IS_ERR(priv->phylink)) { 1447 dev_err(&pdev->dev, "failed to create phylink\n"); 1448 ret = PTR_ERR(priv->phylink); 1449 goto err_init_phylink; 1450 } 1451 1452 return 0; 1453 err_init_phylink: 1454 lynx_pcs_destroy(priv->pcs); 1455 err_init_pcs: 1456 unregister_netdev(ndev); 1457 err_register_netdev: 1458 netif_napi_del(&priv->napi); 1459 altera_tse_mdio_destroy(ndev); 1460 err_free_netdev: 1461 free_netdev(ndev); 1462 return ret; 1463 } 1464 1465 /* Remove Altera TSE MAC device 1466 */ 1467 static int altera_tse_remove(struct platform_device *pdev) 1468 { 1469 struct net_device *ndev = platform_get_drvdata(pdev); 1470 struct altera_tse_private *priv = netdev_priv(ndev); 1471 1472 platform_set_drvdata(pdev, NULL); 1473 altera_tse_mdio_destroy(ndev); 1474 unregister_netdev(ndev); 1475 phylink_destroy(priv->phylink); 1476 lynx_pcs_destroy(priv->pcs); 1477 1478 free_netdev(ndev); 1479 1480 return 0; 1481 } 1482 1483 static const struct altera_dmaops altera_dtype_sgdma = { 1484 .altera_dtype = ALTERA_DTYPE_SGDMA, 1485 .dmamask = 32, 1486 .reset_dma = sgdma_reset, 1487 .enable_txirq = sgdma_enable_txirq, 1488 .enable_rxirq = sgdma_enable_rxirq, 1489 .disable_txirq = sgdma_disable_txirq, 1490 .disable_rxirq = sgdma_disable_rxirq, 1491 .clear_txirq = sgdma_clear_txirq, 1492 .clear_rxirq = sgdma_clear_rxirq, 1493 .tx_buffer = sgdma_tx_buffer, 1494 .tx_completions = sgdma_tx_completions, 1495 .add_rx_desc = sgdma_add_rx_desc, 1496 .get_rx_status = sgdma_rx_status, 1497 .init_dma = sgdma_initialize, 1498 .uninit_dma = sgdma_uninitialize, 1499 .start_rxdma = sgdma_start_rxdma, 1500 }; 1501 1502 static const struct altera_dmaops altera_dtype_msgdma = { 1503 .altera_dtype = ALTERA_DTYPE_MSGDMA, 1504 .dmamask = 64, 1505 .reset_dma = msgdma_reset, 1506 .enable_txirq = msgdma_enable_txirq, 1507 .enable_rxirq = msgdma_enable_rxirq, 1508 .disable_txirq = msgdma_disable_txirq, 1509 .disable_rxirq = msgdma_disable_rxirq, 1510 .clear_txirq = msgdma_clear_txirq, 1511 .clear_rxirq = msgdma_clear_rxirq, 1512 .tx_buffer = msgdma_tx_buffer, 1513 .tx_completions = msgdma_tx_completions, 1514 .add_rx_desc = msgdma_add_rx_desc, 1515 .get_rx_status = msgdma_rx_status, 1516 .init_dma = msgdma_initialize, 1517 .uninit_dma = msgdma_uninitialize, 1518 .start_rxdma = msgdma_start_rxdma, 1519 }; 1520 1521 static const struct of_device_id altera_tse_ids[] = { 1522 { .compatible = "altr,tse-msgdma-1.0", .data = &altera_dtype_msgdma, }, 1523 { .compatible = "altr,tse-1.0", .data = &altera_dtype_sgdma, }, 1524 { .compatible = "ALTR,tse-1.0", .data = &altera_dtype_sgdma, }, 1525 {}, 1526 }; 1527 MODULE_DEVICE_TABLE(of, altera_tse_ids); 1528 1529 static struct platform_driver altera_tse_driver = { 1530 .probe = altera_tse_probe, 1531 .remove = altera_tse_remove, 1532 .suspend = NULL, 1533 .resume = NULL, 1534 .driver = { 1535 .name = ALTERA_TSE_RESOURCE_NAME, 1536 .of_match_table = altera_tse_ids, 1537 }, 1538 }; 1539 1540 module_platform_driver(altera_tse_driver); 1541 1542 MODULE_AUTHOR("Altera Corporation"); 1543 MODULE_DESCRIPTION("Altera Triple Speed Ethernet MAC driver"); 1544 MODULE_LICENSE("GPL v2"); 1545