1 /* Altera Triple-Speed Ethernet MAC driver 2 * Copyright (C) 2008-2014 Altera Corporation. All rights reserved 3 * 4 * Contributors: 5 * Dalon Westergreen 6 * Thomas Chou 7 * Ian Abbott 8 * Yuriy Kozlov 9 * Tobias Klauser 10 * Andriy Smolskyy 11 * Roman Bulgakov 12 * Dmytro Mytarchuk 13 * Matthew Gerlach 14 * 15 * Original driver contributed by SLS. 16 * Major updates contributed by GlobalLogic 17 * 18 * This program is free software; you can redistribute it and/or modify it 19 * under the terms and conditions of the GNU General Public License, 20 * version 2, as published by the Free Software Foundation. 21 * 22 * This program is distributed in the hope it will be useful, but WITHOUT 23 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 24 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 25 * more details. 26 * 27 * You should have received a copy of the GNU General Public License along with 28 * this program. If not, see <http://www.gnu.org/licenses/>. 29 */ 30 31 #include <linux/atomic.h> 32 #include <linux/delay.h> 33 #include <linux/etherdevice.h> 34 #include <linux/if_vlan.h> 35 #include <linux/init.h> 36 #include <linux/interrupt.h> 37 #include <linux/io.h> 38 #include <linux/kernel.h> 39 #include <linux/module.h> 40 #include <linux/netdevice.h> 41 #include <linux/of_device.h> 42 #include <linux/of_mdio.h> 43 #include <linux/of_net.h> 44 #include <linux/of_platform.h> 45 #include <linux/phy.h> 46 #include <linux/platform_device.h> 47 #include <linux/skbuff.h> 48 #include <asm/cacheflush.h> 49 50 #include "altera_utils.h" 51 #include "altera_tse.h" 52 #include "altera_sgdma.h" 53 #include "altera_msgdma.h" 54 55 static atomic_t instance_count = ATOMIC_INIT(~0); 56 /* Module parameters */ 57 static int debug = -1; 58 module_param(debug, int, S_IRUGO | S_IWUSR); 59 MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)"); 60 61 static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE | 62 NETIF_MSG_LINK | NETIF_MSG_IFUP | 63 NETIF_MSG_IFDOWN); 64 65 #define RX_DESCRIPTORS 64 66 static int dma_rx_num = RX_DESCRIPTORS; 67 module_param(dma_rx_num, int, S_IRUGO | S_IWUSR); 68 MODULE_PARM_DESC(dma_rx_num, "Number of descriptors in the RX list"); 69 70 #define TX_DESCRIPTORS 64 71 static int dma_tx_num = TX_DESCRIPTORS; 72 module_param(dma_tx_num, int, S_IRUGO | S_IWUSR); 73 MODULE_PARM_DESC(dma_tx_num, "Number of descriptors in the TX list"); 74 75 76 #define POLL_PHY (-1) 77 78 /* Make sure DMA buffer size is larger than the max frame size 79 * plus some alignment offset and a VLAN header. If the max frame size is 80 * 1518, a VLAN header would be additional 4 bytes and additional 81 * headroom for alignment is 2 bytes, 2048 is just fine. 82 */ 83 #define ALTERA_RXDMABUFFER_SIZE 2048 84 85 /* Allow network stack to resume queueing packets after we've 86 * finished transmitting at least 1/4 of the packets in the queue. 87 */ 88 #define TSE_TX_THRESH(x) (x->tx_ring_size / 4) 89 90 #define TXQUEUESTOP_THRESHHOLD 2 91 92 static const struct of_device_id altera_tse_ids[]; 93 94 static inline u32 tse_tx_avail(struct altera_tse_private *priv) 95 { 96 return priv->tx_cons + priv->tx_ring_size - priv->tx_prod - 1; 97 } 98 99 /* MDIO specific functions 100 */ 101 static int altera_tse_mdio_read(struct mii_bus *bus, int mii_id, int regnum) 102 { 103 struct net_device *ndev = bus->priv; 104 struct altera_tse_private *priv = netdev_priv(ndev); 105 106 /* set MDIO address */ 107 csrwr32((mii_id & 0x1f), priv->mac_dev, 108 tse_csroffs(mdio_phy1_addr)); 109 110 /* get the data */ 111 return csrrd32(priv->mac_dev, 112 tse_csroffs(mdio_phy1) + regnum * 4) & 0xffff; 113 } 114 115 static int altera_tse_mdio_write(struct mii_bus *bus, int mii_id, int regnum, 116 u16 value) 117 { 118 struct net_device *ndev = bus->priv; 119 struct altera_tse_private *priv = netdev_priv(ndev); 120 121 /* set MDIO address */ 122 csrwr32((mii_id & 0x1f), priv->mac_dev, 123 tse_csroffs(mdio_phy1_addr)); 124 125 /* write the data */ 126 csrwr32(value, priv->mac_dev, tse_csroffs(mdio_phy1) + regnum * 4); 127 return 0; 128 } 129 130 static int altera_tse_mdio_create(struct net_device *dev, unsigned int id) 131 { 132 struct altera_tse_private *priv = netdev_priv(dev); 133 int ret; 134 struct device_node *mdio_node = NULL; 135 struct mii_bus *mdio = NULL; 136 struct device_node *child_node = NULL; 137 138 for_each_child_of_node(priv->device->of_node, child_node) { 139 if (of_device_is_compatible(child_node, "altr,tse-mdio")) { 140 mdio_node = child_node; 141 break; 142 } 143 } 144 145 if (mdio_node) { 146 netdev_dbg(dev, "FOUND MDIO subnode\n"); 147 } else { 148 netdev_dbg(dev, "NO MDIO subnode\n"); 149 return 0; 150 } 151 152 mdio = mdiobus_alloc(); 153 if (mdio == NULL) { 154 netdev_err(dev, "Error allocating MDIO bus\n"); 155 return -ENOMEM; 156 } 157 158 mdio->name = ALTERA_TSE_RESOURCE_NAME; 159 mdio->read = &altera_tse_mdio_read; 160 mdio->write = &altera_tse_mdio_write; 161 snprintf(mdio->id, MII_BUS_ID_SIZE, "%s-%u", mdio->name, id); 162 163 mdio->priv = dev; 164 mdio->parent = priv->device; 165 166 ret = of_mdiobus_register(mdio, mdio_node); 167 if (ret != 0) { 168 netdev_err(dev, "Cannot register MDIO bus %s\n", 169 mdio->id); 170 goto out_free_mdio; 171 } 172 173 if (netif_msg_drv(priv)) 174 netdev_info(dev, "MDIO bus %s: created\n", mdio->id); 175 176 priv->mdio = mdio; 177 return 0; 178 out_free_mdio: 179 mdiobus_free(mdio); 180 mdio = NULL; 181 return ret; 182 } 183 184 static void altera_tse_mdio_destroy(struct net_device *dev) 185 { 186 struct altera_tse_private *priv = netdev_priv(dev); 187 188 if (priv->mdio == NULL) 189 return; 190 191 if (netif_msg_drv(priv)) 192 netdev_info(dev, "MDIO bus %s: removed\n", 193 priv->mdio->id); 194 195 mdiobus_unregister(priv->mdio); 196 mdiobus_free(priv->mdio); 197 priv->mdio = NULL; 198 } 199 200 static int tse_init_rx_buffer(struct altera_tse_private *priv, 201 struct tse_buffer *rxbuffer, int len) 202 { 203 rxbuffer->skb = netdev_alloc_skb_ip_align(priv->dev, len); 204 if (!rxbuffer->skb) 205 return -ENOMEM; 206 207 rxbuffer->dma_addr = dma_map_single(priv->device, rxbuffer->skb->data, 208 len, 209 DMA_FROM_DEVICE); 210 211 if (dma_mapping_error(priv->device, rxbuffer->dma_addr)) { 212 netdev_err(priv->dev, "%s: DMA mapping error\n", __func__); 213 dev_kfree_skb_any(rxbuffer->skb); 214 return -EINVAL; 215 } 216 rxbuffer->dma_addr &= (dma_addr_t)~3; 217 rxbuffer->len = len; 218 return 0; 219 } 220 221 static void tse_free_rx_buffer(struct altera_tse_private *priv, 222 struct tse_buffer *rxbuffer) 223 { 224 struct sk_buff *skb = rxbuffer->skb; 225 dma_addr_t dma_addr = rxbuffer->dma_addr; 226 227 if (skb != NULL) { 228 if (dma_addr) 229 dma_unmap_single(priv->device, dma_addr, 230 rxbuffer->len, 231 DMA_FROM_DEVICE); 232 dev_kfree_skb_any(skb); 233 rxbuffer->skb = NULL; 234 rxbuffer->dma_addr = 0; 235 } 236 } 237 238 /* Unmap and free Tx buffer resources 239 */ 240 static void tse_free_tx_buffer(struct altera_tse_private *priv, 241 struct tse_buffer *buffer) 242 { 243 if (buffer->dma_addr) { 244 if (buffer->mapped_as_page) 245 dma_unmap_page(priv->device, buffer->dma_addr, 246 buffer->len, DMA_TO_DEVICE); 247 else 248 dma_unmap_single(priv->device, buffer->dma_addr, 249 buffer->len, DMA_TO_DEVICE); 250 buffer->dma_addr = 0; 251 } 252 if (buffer->skb) { 253 dev_kfree_skb_any(buffer->skb); 254 buffer->skb = NULL; 255 } 256 } 257 258 static int alloc_init_skbufs(struct altera_tse_private *priv) 259 { 260 unsigned int rx_descs = priv->rx_ring_size; 261 unsigned int tx_descs = priv->tx_ring_size; 262 int ret = -ENOMEM; 263 int i; 264 265 /* Create Rx ring buffer */ 266 priv->rx_ring = kcalloc(rx_descs, sizeof(struct tse_buffer), 267 GFP_KERNEL); 268 if (!priv->rx_ring) 269 goto err_rx_ring; 270 271 /* Create Tx ring buffer */ 272 priv->tx_ring = kcalloc(tx_descs, sizeof(struct tse_buffer), 273 GFP_KERNEL); 274 if (!priv->tx_ring) 275 goto err_tx_ring; 276 277 priv->tx_cons = 0; 278 priv->tx_prod = 0; 279 280 /* Init Rx ring */ 281 for (i = 0; i < rx_descs; i++) { 282 ret = tse_init_rx_buffer(priv, &priv->rx_ring[i], 283 priv->rx_dma_buf_sz); 284 if (ret) 285 goto err_init_rx_buffers; 286 } 287 288 priv->rx_cons = 0; 289 priv->rx_prod = 0; 290 291 return 0; 292 err_init_rx_buffers: 293 while (--i >= 0) 294 tse_free_rx_buffer(priv, &priv->rx_ring[i]); 295 kfree(priv->tx_ring); 296 err_tx_ring: 297 kfree(priv->rx_ring); 298 err_rx_ring: 299 return ret; 300 } 301 302 static void free_skbufs(struct net_device *dev) 303 { 304 struct altera_tse_private *priv = netdev_priv(dev); 305 unsigned int rx_descs = priv->rx_ring_size; 306 unsigned int tx_descs = priv->tx_ring_size; 307 int i; 308 309 /* Release the DMA TX/RX socket buffers */ 310 for (i = 0; i < rx_descs; i++) 311 tse_free_rx_buffer(priv, &priv->rx_ring[i]); 312 for (i = 0; i < tx_descs; i++) 313 tse_free_tx_buffer(priv, &priv->tx_ring[i]); 314 315 316 kfree(priv->tx_ring); 317 } 318 319 /* Reallocate the skb for the reception process 320 */ 321 static inline void tse_rx_refill(struct altera_tse_private *priv) 322 { 323 unsigned int rxsize = priv->rx_ring_size; 324 unsigned int entry; 325 int ret; 326 327 for (; priv->rx_cons - priv->rx_prod > 0; 328 priv->rx_prod++) { 329 entry = priv->rx_prod % rxsize; 330 if (likely(priv->rx_ring[entry].skb == NULL)) { 331 ret = tse_init_rx_buffer(priv, &priv->rx_ring[entry], 332 priv->rx_dma_buf_sz); 333 if (unlikely(ret != 0)) 334 break; 335 priv->dmaops->add_rx_desc(priv, &priv->rx_ring[entry]); 336 } 337 } 338 } 339 340 /* Pull out the VLAN tag and fix up the packet 341 */ 342 static inline void tse_rx_vlan(struct net_device *dev, struct sk_buff *skb) 343 { 344 struct ethhdr *eth_hdr; 345 u16 vid; 346 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) && 347 !__vlan_get_tag(skb, &vid)) { 348 eth_hdr = (struct ethhdr *)skb->data; 349 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2); 350 skb_pull(skb, VLAN_HLEN); 351 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); 352 } 353 } 354 355 /* Receive a packet: retrieve and pass over to upper levels 356 */ 357 static int tse_rx(struct altera_tse_private *priv, int limit) 358 { 359 unsigned int count = 0; 360 unsigned int next_entry; 361 struct sk_buff *skb; 362 unsigned int entry = priv->rx_cons % priv->rx_ring_size; 363 u32 rxstatus; 364 u16 pktlength; 365 u16 pktstatus; 366 367 /* Check for count < limit first as get_rx_status is changing 368 * the response-fifo so we must process the next packet 369 * after calling get_rx_status if a response is pending. 370 * (reading the last byte of the response pops the value from the fifo.) 371 */ 372 while ((count < limit) && 373 ((rxstatus = priv->dmaops->get_rx_status(priv)) != 0)) { 374 pktstatus = rxstatus >> 16; 375 pktlength = rxstatus & 0xffff; 376 377 if ((pktstatus & 0xFF) || (pktlength == 0)) 378 netdev_err(priv->dev, 379 "RCV pktstatus %08X pktlength %08X\n", 380 pktstatus, pktlength); 381 382 /* DMA trasfer from TSE starts with 2 aditional bytes for 383 * IP payload alignment. Status returned by get_rx_status() 384 * contains DMA transfer length. Packet is 2 bytes shorter. 385 */ 386 pktlength -= 2; 387 388 count++; 389 next_entry = (++priv->rx_cons) % priv->rx_ring_size; 390 391 skb = priv->rx_ring[entry].skb; 392 if (unlikely(!skb)) { 393 netdev_err(priv->dev, 394 "%s: Inconsistent Rx descriptor chain\n", 395 __func__); 396 priv->dev->stats.rx_dropped++; 397 break; 398 } 399 priv->rx_ring[entry].skb = NULL; 400 401 skb_put(skb, pktlength); 402 403 /* make cache consistent with receive packet buffer */ 404 dma_sync_single_for_cpu(priv->device, 405 priv->rx_ring[entry].dma_addr, 406 priv->rx_ring[entry].len, 407 DMA_FROM_DEVICE); 408 409 dma_unmap_single(priv->device, priv->rx_ring[entry].dma_addr, 410 priv->rx_ring[entry].len, DMA_FROM_DEVICE); 411 412 if (netif_msg_pktdata(priv)) { 413 netdev_info(priv->dev, "frame received %d bytes\n", 414 pktlength); 415 print_hex_dump(KERN_ERR, "data: ", DUMP_PREFIX_OFFSET, 416 16, 1, skb->data, pktlength, true); 417 } 418 419 tse_rx_vlan(priv->dev, skb); 420 421 skb->protocol = eth_type_trans(skb, priv->dev); 422 skb_checksum_none_assert(skb); 423 424 napi_gro_receive(&priv->napi, skb); 425 426 priv->dev->stats.rx_packets++; 427 priv->dev->stats.rx_bytes += pktlength; 428 429 entry = next_entry; 430 431 tse_rx_refill(priv); 432 } 433 434 return count; 435 } 436 437 /* Reclaim resources after transmission completes 438 */ 439 static int tse_tx_complete(struct altera_tse_private *priv) 440 { 441 unsigned int txsize = priv->tx_ring_size; 442 u32 ready; 443 unsigned int entry; 444 struct tse_buffer *tx_buff; 445 int txcomplete = 0; 446 447 spin_lock(&priv->tx_lock); 448 449 ready = priv->dmaops->tx_completions(priv); 450 451 /* Free sent buffers */ 452 while (ready && (priv->tx_cons != priv->tx_prod)) { 453 entry = priv->tx_cons % txsize; 454 tx_buff = &priv->tx_ring[entry]; 455 456 if (netif_msg_tx_done(priv)) 457 netdev_dbg(priv->dev, "%s: curr %d, dirty %d\n", 458 __func__, priv->tx_prod, priv->tx_cons); 459 460 if (likely(tx_buff->skb)) 461 priv->dev->stats.tx_packets++; 462 463 tse_free_tx_buffer(priv, tx_buff); 464 priv->tx_cons++; 465 466 txcomplete++; 467 ready--; 468 } 469 470 if (unlikely(netif_queue_stopped(priv->dev) && 471 tse_tx_avail(priv) > TSE_TX_THRESH(priv))) { 472 netif_tx_lock(priv->dev); 473 if (netif_queue_stopped(priv->dev) && 474 tse_tx_avail(priv) > TSE_TX_THRESH(priv)) { 475 if (netif_msg_tx_done(priv)) 476 netdev_dbg(priv->dev, "%s: restart transmit\n", 477 __func__); 478 netif_wake_queue(priv->dev); 479 } 480 netif_tx_unlock(priv->dev); 481 } 482 483 spin_unlock(&priv->tx_lock); 484 return txcomplete; 485 } 486 487 /* NAPI polling function 488 */ 489 static int tse_poll(struct napi_struct *napi, int budget) 490 { 491 struct altera_tse_private *priv = 492 container_of(napi, struct altera_tse_private, napi); 493 int rxcomplete = 0; 494 unsigned long int flags; 495 496 tse_tx_complete(priv); 497 498 rxcomplete = tse_rx(priv, budget); 499 500 if (rxcomplete < budget) { 501 502 napi_complete(napi); 503 504 netdev_dbg(priv->dev, 505 "NAPI Complete, did %d packets with budget %d\n", 506 rxcomplete, budget); 507 508 spin_lock_irqsave(&priv->rxdma_irq_lock, flags); 509 priv->dmaops->enable_rxirq(priv); 510 priv->dmaops->enable_txirq(priv); 511 spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); 512 } 513 return rxcomplete; 514 } 515 516 /* DMA TX & RX FIFO interrupt routing 517 */ 518 static irqreturn_t altera_isr(int irq, void *dev_id) 519 { 520 struct net_device *dev = dev_id; 521 struct altera_tse_private *priv; 522 523 if (unlikely(!dev)) { 524 pr_err("%s: invalid dev pointer\n", __func__); 525 return IRQ_NONE; 526 } 527 priv = netdev_priv(dev); 528 529 spin_lock(&priv->rxdma_irq_lock); 530 /* reset IRQs */ 531 priv->dmaops->clear_rxirq(priv); 532 priv->dmaops->clear_txirq(priv); 533 spin_unlock(&priv->rxdma_irq_lock); 534 535 if (likely(napi_schedule_prep(&priv->napi))) { 536 spin_lock(&priv->rxdma_irq_lock); 537 priv->dmaops->disable_rxirq(priv); 538 priv->dmaops->disable_txirq(priv); 539 spin_unlock(&priv->rxdma_irq_lock); 540 __napi_schedule(&priv->napi); 541 } 542 543 544 return IRQ_HANDLED; 545 } 546 547 /* Transmit a packet (called by the kernel). Dispatches 548 * either the SGDMA method for transmitting or the 549 * MSGDMA method, assumes no scatter/gather support, 550 * implying an assumption that there's only one 551 * physically contiguous fragment starting at 552 * skb->data, for length of skb_headlen(skb). 553 */ 554 static int tse_start_xmit(struct sk_buff *skb, struct net_device *dev) 555 { 556 struct altera_tse_private *priv = netdev_priv(dev); 557 unsigned int txsize = priv->tx_ring_size; 558 unsigned int entry; 559 struct tse_buffer *buffer = NULL; 560 int nfrags = skb_shinfo(skb)->nr_frags; 561 unsigned int nopaged_len = skb_headlen(skb); 562 enum netdev_tx ret = NETDEV_TX_OK; 563 dma_addr_t dma_addr; 564 565 spin_lock_bh(&priv->tx_lock); 566 567 if (unlikely(tse_tx_avail(priv) < nfrags + 1)) { 568 if (!netif_queue_stopped(dev)) { 569 netif_stop_queue(dev); 570 /* This is a hard error, log it. */ 571 netdev_err(priv->dev, 572 "%s: Tx list full when queue awake\n", 573 __func__); 574 } 575 ret = NETDEV_TX_BUSY; 576 goto out; 577 } 578 579 /* Map the first skb fragment */ 580 entry = priv->tx_prod % txsize; 581 buffer = &priv->tx_ring[entry]; 582 583 dma_addr = dma_map_single(priv->device, skb->data, nopaged_len, 584 DMA_TO_DEVICE); 585 if (dma_mapping_error(priv->device, dma_addr)) { 586 netdev_err(priv->dev, "%s: DMA mapping error\n", __func__); 587 ret = NETDEV_TX_OK; 588 goto out; 589 } 590 591 buffer->skb = skb; 592 buffer->dma_addr = dma_addr; 593 buffer->len = nopaged_len; 594 595 /* Push data out of the cache hierarchy into main memory */ 596 dma_sync_single_for_device(priv->device, buffer->dma_addr, 597 buffer->len, DMA_TO_DEVICE); 598 599 priv->dmaops->tx_buffer(priv, buffer); 600 601 skb_tx_timestamp(skb); 602 603 priv->tx_prod++; 604 dev->stats.tx_bytes += skb->len; 605 606 if (unlikely(tse_tx_avail(priv) <= TXQUEUESTOP_THRESHHOLD)) { 607 if (netif_msg_hw(priv)) 608 netdev_dbg(priv->dev, "%s: stop transmitted packets\n", 609 __func__); 610 netif_stop_queue(dev); 611 } 612 613 out: 614 spin_unlock_bh(&priv->tx_lock); 615 616 return ret; 617 } 618 619 /* Called every time the controller might need to be made 620 * aware of new link state. The PHY code conveys this 621 * information through variables in the phydev structure, and this 622 * function converts those variables into the appropriate 623 * register values, and can bring down the device if needed. 624 */ 625 static void altera_tse_adjust_link(struct net_device *dev) 626 { 627 struct altera_tse_private *priv = netdev_priv(dev); 628 struct phy_device *phydev = priv->phydev; 629 int new_state = 0; 630 631 /* only change config if there is a link */ 632 spin_lock(&priv->mac_cfg_lock); 633 if (phydev->link) { 634 /* Read old config */ 635 u32 cfg_reg = ioread32(&priv->mac_dev->command_config); 636 637 /* Check duplex */ 638 if (phydev->duplex != priv->oldduplex) { 639 new_state = 1; 640 if (!(phydev->duplex)) 641 cfg_reg |= MAC_CMDCFG_HD_ENA; 642 else 643 cfg_reg &= ~MAC_CMDCFG_HD_ENA; 644 645 netdev_dbg(priv->dev, "%s: Link duplex = 0x%x\n", 646 dev->name, phydev->duplex); 647 648 priv->oldduplex = phydev->duplex; 649 } 650 651 /* Check speed */ 652 if (phydev->speed != priv->oldspeed) { 653 new_state = 1; 654 switch (phydev->speed) { 655 case 1000: 656 cfg_reg |= MAC_CMDCFG_ETH_SPEED; 657 cfg_reg &= ~MAC_CMDCFG_ENA_10; 658 break; 659 case 100: 660 cfg_reg &= ~MAC_CMDCFG_ETH_SPEED; 661 cfg_reg &= ~MAC_CMDCFG_ENA_10; 662 break; 663 case 10: 664 cfg_reg &= ~MAC_CMDCFG_ETH_SPEED; 665 cfg_reg |= MAC_CMDCFG_ENA_10; 666 break; 667 default: 668 if (netif_msg_link(priv)) 669 netdev_warn(dev, "Speed (%d) is not 10/100/1000!\n", 670 phydev->speed); 671 break; 672 } 673 priv->oldspeed = phydev->speed; 674 } 675 iowrite32(cfg_reg, &priv->mac_dev->command_config); 676 677 if (!priv->oldlink) { 678 new_state = 1; 679 priv->oldlink = 1; 680 } 681 } else if (priv->oldlink) { 682 new_state = 1; 683 priv->oldlink = 0; 684 priv->oldspeed = 0; 685 priv->oldduplex = -1; 686 } 687 688 if (new_state && netif_msg_link(priv)) 689 phy_print_status(phydev); 690 691 spin_unlock(&priv->mac_cfg_lock); 692 } 693 static struct phy_device *connect_local_phy(struct net_device *dev) 694 { 695 struct altera_tse_private *priv = netdev_priv(dev); 696 struct phy_device *phydev = NULL; 697 char phy_id_fmt[MII_BUS_ID_SIZE + 3]; 698 699 if (priv->phy_addr != POLL_PHY) { 700 snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT, 701 priv->mdio->id, priv->phy_addr); 702 703 netdev_dbg(dev, "trying to attach to %s\n", phy_id_fmt); 704 705 phydev = phy_connect(dev, phy_id_fmt, &altera_tse_adjust_link, 706 priv->phy_iface); 707 if (IS_ERR(phydev)) 708 netdev_err(dev, "Could not attach to PHY\n"); 709 710 } else { 711 int ret; 712 phydev = phy_find_first(priv->mdio); 713 if (phydev == NULL) { 714 netdev_err(dev, "No PHY found\n"); 715 return phydev; 716 } 717 718 ret = phy_connect_direct(dev, phydev, &altera_tse_adjust_link, 719 priv->phy_iface); 720 if (ret != 0) { 721 netdev_err(dev, "Could not attach to PHY\n"); 722 phydev = NULL; 723 } 724 } 725 return phydev; 726 } 727 728 static int altera_tse_phy_get_addr_mdio_create(struct net_device *dev) 729 { 730 struct altera_tse_private *priv = netdev_priv(dev); 731 struct device_node *np = priv->device->of_node; 732 int ret = 0; 733 734 priv->phy_iface = of_get_phy_mode(np); 735 736 /* Avoid get phy addr and create mdio if no phy is present */ 737 if (!priv->phy_iface) 738 return 0; 739 740 /* try to get PHY address from device tree, use PHY autodetection if 741 * no valid address is given 742 */ 743 744 if (of_property_read_u32(priv->device->of_node, "phy-addr", 745 &priv->phy_addr)) { 746 priv->phy_addr = POLL_PHY; 747 } 748 749 if (!((priv->phy_addr == POLL_PHY) || 750 ((priv->phy_addr >= 0) && (priv->phy_addr < PHY_MAX_ADDR)))) { 751 netdev_err(dev, "invalid phy-addr specified %d\n", 752 priv->phy_addr); 753 return -ENODEV; 754 } 755 756 /* Create/attach to MDIO bus */ 757 ret = altera_tse_mdio_create(dev, 758 atomic_add_return(1, &instance_count)); 759 760 if (ret) 761 return -ENODEV; 762 763 return 0; 764 } 765 766 /* Initialize driver's PHY state, and attach to the PHY 767 */ 768 static int init_phy(struct net_device *dev) 769 { 770 struct altera_tse_private *priv = netdev_priv(dev); 771 struct phy_device *phydev; 772 struct device_node *phynode; 773 bool fixed_link = false; 774 int rc = 0; 775 776 /* Avoid init phy in case of no phy present */ 777 if (!priv->phy_iface) 778 return 0; 779 780 priv->oldlink = 0; 781 priv->oldspeed = 0; 782 priv->oldduplex = -1; 783 784 phynode = of_parse_phandle(priv->device->of_node, "phy-handle", 0); 785 786 if (!phynode) { 787 /* check if a fixed-link is defined in device-tree */ 788 if (of_phy_is_fixed_link(priv->device->of_node)) { 789 rc = of_phy_register_fixed_link(priv->device->of_node); 790 if (rc < 0) { 791 netdev_err(dev, "cannot register fixed PHY\n"); 792 return rc; 793 } 794 795 /* In the case of a fixed PHY, the DT node associated 796 * to the PHY is the Ethernet MAC DT node. 797 */ 798 phynode = of_node_get(priv->device->of_node); 799 fixed_link = true; 800 801 netdev_dbg(dev, "fixed-link detected\n"); 802 phydev = of_phy_connect(dev, phynode, 803 &altera_tse_adjust_link, 804 0, priv->phy_iface); 805 } else { 806 netdev_dbg(dev, "no phy-handle found\n"); 807 if (!priv->mdio) { 808 netdev_err(dev, "No phy-handle nor local mdio specified\n"); 809 return -ENODEV; 810 } 811 phydev = connect_local_phy(dev); 812 } 813 } else { 814 netdev_dbg(dev, "phy-handle found\n"); 815 phydev = of_phy_connect(dev, phynode, 816 &altera_tse_adjust_link, 0, priv->phy_iface); 817 } 818 819 if (!phydev) { 820 netdev_err(dev, "Could not find the PHY\n"); 821 return -ENODEV; 822 } 823 824 /* Stop Advertising 1000BASE Capability if interface is not GMII 825 * Note: Checkpatch throws CHECKs for the camel case defines below, 826 * it's ok to ignore. 827 */ 828 if ((priv->phy_iface == PHY_INTERFACE_MODE_MII) || 829 (priv->phy_iface == PHY_INTERFACE_MODE_RMII)) 830 phydev->advertising &= ~(SUPPORTED_1000baseT_Half | 831 SUPPORTED_1000baseT_Full); 832 833 /* Broken HW is sometimes missing the pull-up resistor on the 834 * MDIO line, which results in reads to non-existent devices returning 835 * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent 836 * device as well. If a fixed-link is used the phy_id is always 0. 837 * Note: phydev->phy_id is the result of reading the UID PHY registers. 838 */ 839 if ((phydev->phy_id == 0) && !fixed_link) { 840 netdev_err(dev, "Bad PHY UID 0x%08x\n", phydev->phy_id); 841 phy_disconnect(phydev); 842 return -ENODEV; 843 } 844 845 netdev_dbg(dev, "attached to PHY %d UID 0x%08x Link = %d\n", 846 phydev->mdio.addr, phydev->phy_id, phydev->link); 847 848 priv->phydev = phydev; 849 return 0; 850 } 851 852 static void tse_update_mac_addr(struct altera_tse_private *priv, u8 *addr) 853 { 854 u32 msb; 855 u32 lsb; 856 857 msb = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0]; 858 lsb = ((addr[5] << 8) | addr[4]) & 0xffff; 859 860 /* Set primary MAC address */ 861 csrwr32(msb, priv->mac_dev, tse_csroffs(mac_addr_0)); 862 csrwr32(lsb, priv->mac_dev, tse_csroffs(mac_addr_1)); 863 } 864 865 /* MAC software reset. 866 * When reset is triggered, the MAC function completes the current 867 * transmission or reception, and subsequently disables the transmit and 868 * receive logic, flushes the receive FIFO buffer, and resets the statistics 869 * counters. 870 */ 871 static int reset_mac(struct altera_tse_private *priv) 872 { 873 int counter; 874 u32 dat; 875 876 dat = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 877 dat &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA); 878 dat |= MAC_CMDCFG_SW_RESET | MAC_CMDCFG_CNT_RESET; 879 csrwr32(dat, priv->mac_dev, tse_csroffs(command_config)); 880 881 counter = 0; 882 while (counter++ < ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) { 883 if (tse_bit_is_clear(priv->mac_dev, tse_csroffs(command_config), 884 MAC_CMDCFG_SW_RESET)) 885 break; 886 udelay(1); 887 } 888 889 if (counter >= ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) { 890 dat = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 891 dat &= ~MAC_CMDCFG_SW_RESET; 892 csrwr32(dat, priv->mac_dev, tse_csroffs(command_config)); 893 return -1; 894 } 895 return 0; 896 } 897 898 /* Initialize MAC core registers 899 */ 900 static int init_mac(struct altera_tse_private *priv) 901 { 902 unsigned int cmd = 0; 903 u32 frm_length; 904 905 /* Setup Rx FIFO */ 906 csrwr32(priv->rx_fifo_depth - ALTERA_TSE_RX_SECTION_EMPTY, 907 priv->mac_dev, tse_csroffs(rx_section_empty)); 908 909 csrwr32(ALTERA_TSE_RX_SECTION_FULL, priv->mac_dev, 910 tse_csroffs(rx_section_full)); 911 912 csrwr32(ALTERA_TSE_RX_ALMOST_EMPTY, priv->mac_dev, 913 tse_csroffs(rx_almost_empty)); 914 915 csrwr32(ALTERA_TSE_RX_ALMOST_FULL, priv->mac_dev, 916 tse_csroffs(rx_almost_full)); 917 918 /* Setup Tx FIFO */ 919 csrwr32(priv->tx_fifo_depth - ALTERA_TSE_TX_SECTION_EMPTY, 920 priv->mac_dev, tse_csroffs(tx_section_empty)); 921 922 csrwr32(ALTERA_TSE_TX_SECTION_FULL, priv->mac_dev, 923 tse_csroffs(tx_section_full)); 924 925 csrwr32(ALTERA_TSE_TX_ALMOST_EMPTY, priv->mac_dev, 926 tse_csroffs(tx_almost_empty)); 927 928 csrwr32(ALTERA_TSE_TX_ALMOST_FULL, priv->mac_dev, 929 tse_csroffs(tx_almost_full)); 930 931 /* MAC Address Configuration */ 932 tse_update_mac_addr(priv, priv->dev->dev_addr); 933 934 /* MAC Function Configuration */ 935 frm_length = ETH_HLEN + priv->dev->mtu + ETH_FCS_LEN; 936 csrwr32(frm_length, priv->mac_dev, tse_csroffs(frm_length)); 937 938 csrwr32(ALTERA_TSE_TX_IPG_LENGTH, priv->mac_dev, 939 tse_csroffs(tx_ipg_length)); 940 941 /* Disable RX/TX shift 16 for alignment of all received frames on 16-bit 942 * start address 943 */ 944 tse_set_bit(priv->mac_dev, tse_csroffs(rx_cmd_stat), 945 ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16); 946 947 tse_clear_bit(priv->mac_dev, tse_csroffs(tx_cmd_stat), 948 ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 | 949 ALTERA_TSE_TX_CMD_STAT_OMIT_CRC); 950 951 /* Set the MAC options */ 952 cmd = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 953 cmd &= ~MAC_CMDCFG_PAD_EN; /* No padding Removal on Receive */ 954 cmd &= ~MAC_CMDCFG_CRC_FWD; /* CRC Removal */ 955 cmd |= MAC_CMDCFG_RX_ERR_DISC; /* Automatically discard frames 956 * with CRC errors 957 */ 958 cmd |= MAC_CMDCFG_CNTL_FRM_ENA; 959 cmd &= ~MAC_CMDCFG_TX_ENA; 960 cmd &= ~MAC_CMDCFG_RX_ENA; 961 962 /* Default speed and duplex setting, full/100 */ 963 cmd &= ~MAC_CMDCFG_HD_ENA; 964 cmd &= ~MAC_CMDCFG_ETH_SPEED; 965 cmd &= ~MAC_CMDCFG_ENA_10; 966 967 csrwr32(cmd, priv->mac_dev, tse_csroffs(command_config)); 968 969 csrwr32(ALTERA_TSE_PAUSE_QUANTA, priv->mac_dev, 970 tse_csroffs(pause_quanta)); 971 972 if (netif_msg_hw(priv)) 973 dev_dbg(priv->device, 974 "MAC post-initialization: CMD_CONFIG = 0x%08x\n", cmd); 975 976 return 0; 977 } 978 979 /* Start/stop MAC transmission logic 980 */ 981 static void tse_set_mac(struct altera_tse_private *priv, bool enable) 982 { 983 u32 value = csrrd32(priv->mac_dev, tse_csroffs(command_config)); 984 985 if (enable) 986 value |= MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA; 987 else 988 value &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA); 989 990 csrwr32(value, priv->mac_dev, tse_csroffs(command_config)); 991 } 992 993 /* Change the MTU 994 */ 995 static int tse_change_mtu(struct net_device *dev, int new_mtu) 996 { 997 struct altera_tse_private *priv = netdev_priv(dev); 998 unsigned int max_mtu = priv->max_mtu; 999 unsigned int min_mtu = ETH_ZLEN + ETH_FCS_LEN; 1000 1001 if (netif_running(dev)) { 1002 netdev_err(dev, "must be stopped to change its MTU\n"); 1003 return -EBUSY; 1004 } 1005 1006 if ((new_mtu < min_mtu) || (new_mtu > max_mtu)) { 1007 netdev_err(dev, "invalid MTU, max MTU is: %u\n", max_mtu); 1008 return -EINVAL; 1009 } 1010 1011 dev->mtu = new_mtu; 1012 netdev_update_features(dev); 1013 1014 return 0; 1015 } 1016 1017 static void altera_tse_set_mcfilter(struct net_device *dev) 1018 { 1019 struct altera_tse_private *priv = netdev_priv(dev); 1020 int i; 1021 struct netdev_hw_addr *ha; 1022 1023 /* clear the hash filter */ 1024 for (i = 0; i < 64; i++) 1025 csrwr32(0, priv->mac_dev, tse_csroffs(hash_table) + i * 4); 1026 1027 netdev_for_each_mc_addr(ha, dev) { 1028 unsigned int hash = 0; 1029 int mac_octet; 1030 1031 for (mac_octet = 5; mac_octet >= 0; mac_octet--) { 1032 unsigned char xor_bit = 0; 1033 unsigned char octet = ha->addr[mac_octet]; 1034 unsigned int bitshift; 1035 1036 for (bitshift = 0; bitshift < 8; bitshift++) 1037 xor_bit ^= ((octet >> bitshift) & 0x01); 1038 1039 hash = (hash << 1) | xor_bit; 1040 } 1041 csrwr32(1, priv->mac_dev, tse_csroffs(hash_table) + hash * 4); 1042 } 1043 } 1044 1045 1046 static void altera_tse_set_mcfilterall(struct net_device *dev) 1047 { 1048 struct altera_tse_private *priv = netdev_priv(dev); 1049 int i; 1050 1051 /* set the hash filter */ 1052 for (i = 0; i < 64; i++) 1053 csrwr32(1, priv->mac_dev, tse_csroffs(hash_table) + i * 4); 1054 } 1055 1056 /* Set or clear the multicast filter for this adaptor 1057 */ 1058 static void tse_set_rx_mode_hashfilter(struct net_device *dev) 1059 { 1060 struct altera_tse_private *priv = netdev_priv(dev); 1061 1062 spin_lock(&priv->mac_cfg_lock); 1063 1064 if (dev->flags & IFF_PROMISC) 1065 tse_set_bit(priv->mac_dev, tse_csroffs(command_config), 1066 MAC_CMDCFG_PROMIS_EN); 1067 1068 if (dev->flags & IFF_ALLMULTI) 1069 altera_tse_set_mcfilterall(dev); 1070 else 1071 altera_tse_set_mcfilter(dev); 1072 1073 spin_unlock(&priv->mac_cfg_lock); 1074 } 1075 1076 /* Set or clear the multicast filter for this adaptor 1077 */ 1078 static void tse_set_rx_mode(struct net_device *dev) 1079 { 1080 struct altera_tse_private *priv = netdev_priv(dev); 1081 1082 spin_lock(&priv->mac_cfg_lock); 1083 1084 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) || 1085 !netdev_mc_empty(dev) || !netdev_uc_empty(dev)) 1086 tse_set_bit(priv->mac_dev, tse_csroffs(command_config), 1087 MAC_CMDCFG_PROMIS_EN); 1088 else 1089 tse_clear_bit(priv->mac_dev, tse_csroffs(command_config), 1090 MAC_CMDCFG_PROMIS_EN); 1091 1092 spin_unlock(&priv->mac_cfg_lock); 1093 } 1094 1095 /* Open and initialize the interface 1096 */ 1097 static int tse_open(struct net_device *dev) 1098 { 1099 struct altera_tse_private *priv = netdev_priv(dev); 1100 int ret = 0; 1101 int i; 1102 unsigned long int flags; 1103 1104 /* Reset and configure TSE MAC and probe associated PHY */ 1105 ret = priv->dmaops->init_dma(priv); 1106 if (ret != 0) { 1107 netdev_err(dev, "Cannot initialize DMA\n"); 1108 goto phy_error; 1109 } 1110 1111 if (netif_msg_ifup(priv)) 1112 netdev_warn(dev, "device MAC address %pM\n", 1113 dev->dev_addr); 1114 1115 if ((priv->revision < 0xd00) || (priv->revision > 0xe00)) 1116 netdev_warn(dev, "TSE revision %x\n", priv->revision); 1117 1118 spin_lock(&priv->mac_cfg_lock); 1119 ret = reset_mac(priv); 1120 /* Note that reset_mac will fail if the clocks are gated by the PHY 1121 * due to the PHY being put into isolation or power down mode. 1122 * This is not an error if reset fails due to no clock. 1123 */ 1124 if (ret) 1125 netdev_dbg(dev, "Cannot reset MAC core (error: %d)\n", ret); 1126 1127 ret = init_mac(priv); 1128 spin_unlock(&priv->mac_cfg_lock); 1129 if (ret) { 1130 netdev_err(dev, "Cannot init MAC core (error: %d)\n", ret); 1131 goto alloc_skbuf_error; 1132 } 1133 1134 priv->dmaops->reset_dma(priv); 1135 1136 /* Create and initialize the TX/RX descriptors chains. */ 1137 priv->rx_ring_size = dma_rx_num; 1138 priv->tx_ring_size = dma_tx_num; 1139 ret = alloc_init_skbufs(priv); 1140 if (ret) { 1141 netdev_err(dev, "DMA descriptors initialization failed\n"); 1142 goto alloc_skbuf_error; 1143 } 1144 1145 1146 /* Register RX interrupt */ 1147 ret = request_irq(priv->rx_irq, altera_isr, IRQF_SHARED, 1148 dev->name, dev); 1149 if (ret) { 1150 netdev_err(dev, "Unable to register RX interrupt %d\n", 1151 priv->rx_irq); 1152 goto init_error; 1153 } 1154 1155 /* Register TX interrupt */ 1156 ret = request_irq(priv->tx_irq, altera_isr, IRQF_SHARED, 1157 dev->name, dev); 1158 if (ret) { 1159 netdev_err(dev, "Unable to register TX interrupt %d\n", 1160 priv->tx_irq); 1161 goto tx_request_irq_error; 1162 } 1163 1164 /* Enable DMA interrupts */ 1165 spin_lock_irqsave(&priv->rxdma_irq_lock, flags); 1166 priv->dmaops->enable_rxirq(priv); 1167 priv->dmaops->enable_txirq(priv); 1168 1169 /* Setup RX descriptor chain */ 1170 for (i = 0; i < priv->rx_ring_size; i++) 1171 priv->dmaops->add_rx_desc(priv, &priv->rx_ring[i]); 1172 1173 spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); 1174 1175 if (priv->phydev) 1176 phy_start(priv->phydev); 1177 1178 napi_enable(&priv->napi); 1179 netif_start_queue(dev); 1180 1181 priv->dmaops->start_rxdma(priv); 1182 1183 /* Start MAC Rx/Tx */ 1184 spin_lock(&priv->mac_cfg_lock); 1185 tse_set_mac(priv, true); 1186 spin_unlock(&priv->mac_cfg_lock); 1187 1188 return 0; 1189 1190 tx_request_irq_error: 1191 free_irq(priv->rx_irq, dev); 1192 init_error: 1193 free_skbufs(dev); 1194 alloc_skbuf_error: 1195 phy_error: 1196 return ret; 1197 } 1198 1199 /* Stop TSE MAC interface and put the device in an inactive state 1200 */ 1201 static int tse_shutdown(struct net_device *dev) 1202 { 1203 struct altera_tse_private *priv = netdev_priv(dev); 1204 int ret; 1205 unsigned long int flags; 1206 1207 /* Stop the PHY */ 1208 if (priv->phydev) 1209 phy_stop(priv->phydev); 1210 1211 netif_stop_queue(dev); 1212 napi_disable(&priv->napi); 1213 1214 /* Disable DMA interrupts */ 1215 spin_lock_irqsave(&priv->rxdma_irq_lock, flags); 1216 priv->dmaops->disable_rxirq(priv); 1217 priv->dmaops->disable_txirq(priv); 1218 spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags); 1219 1220 /* Free the IRQ lines */ 1221 free_irq(priv->rx_irq, dev); 1222 free_irq(priv->tx_irq, dev); 1223 1224 /* disable and reset the MAC, empties fifo */ 1225 spin_lock(&priv->mac_cfg_lock); 1226 spin_lock(&priv->tx_lock); 1227 1228 ret = reset_mac(priv); 1229 /* Note that reset_mac will fail if the clocks are gated by the PHY 1230 * due to the PHY being put into isolation or power down mode. 1231 * This is not an error if reset fails due to no clock. 1232 */ 1233 if (ret) 1234 netdev_dbg(dev, "Cannot reset MAC core (error: %d)\n", ret); 1235 priv->dmaops->reset_dma(priv); 1236 free_skbufs(dev); 1237 1238 spin_unlock(&priv->tx_lock); 1239 spin_unlock(&priv->mac_cfg_lock); 1240 1241 priv->dmaops->uninit_dma(priv); 1242 1243 return 0; 1244 } 1245 1246 static struct net_device_ops altera_tse_netdev_ops = { 1247 .ndo_open = tse_open, 1248 .ndo_stop = tse_shutdown, 1249 .ndo_start_xmit = tse_start_xmit, 1250 .ndo_set_mac_address = eth_mac_addr, 1251 .ndo_set_rx_mode = tse_set_rx_mode, 1252 .ndo_change_mtu = tse_change_mtu, 1253 .ndo_validate_addr = eth_validate_addr, 1254 }; 1255 1256 static int request_and_map(struct platform_device *pdev, const char *name, 1257 struct resource **res, void __iomem **ptr) 1258 { 1259 struct resource *region; 1260 struct device *device = &pdev->dev; 1261 1262 *res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); 1263 if (*res == NULL) { 1264 dev_err(device, "resource %s not defined\n", name); 1265 return -ENODEV; 1266 } 1267 1268 region = devm_request_mem_region(device, (*res)->start, 1269 resource_size(*res), dev_name(device)); 1270 if (region == NULL) { 1271 dev_err(device, "unable to request %s\n", name); 1272 return -EBUSY; 1273 } 1274 1275 *ptr = devm_ioremap_nocache(device, region->start, 1276 resource_size(region)); 1277 if (*ptr == NULL) { 1278 dev_err(device, "ioremap_nocache of %s failed!", name); 1279 return -ENOMEM; 1280 } 1281 1282 return 0; 1283 } 1284 1285 /* Probe Altera TSE MAC device 1286 */ 1287 static int altera_tse_probe(struct platform_device *pdev) 1288 { 1289 struct net_device *ndev; 1290 int ret = -ENODEV; 1291 struct resource *control_port; 1292 struct resource *dma_res; 1293 struct altera_tse_private *priv; 1294 const unsigned char *macaddr; 1295 void __iomem *descmap; 1296 const struct of_device_id *of_id = NULL; 1297 1298 ndev = alloc_etherdev(sizeof(struct altera_tse_private)); 1299 if (!ndev) { 1300 dev_err(&pdev->dev, "Could not allocate network device\n"); 1301 return -ENODEV; 1302 } 1303 1304 SET_NETDEV_DEV(ndev, &pdev->dev); 1305 1306 priv = netdev_priv(ndev); 1307 priv->device = &pdev->dev; 1308 priv->dev = ndev; 1309 priv->msg_enable = netif_msg_init(debug, default_msg_level); 1310 1311 of_id = of_match_device(altera_tse_ids, &pdev->dev); 1312 1313 if (of_id) 1314 priv->dmaops = (struct altera_dmaops *)of_id->data; 1315 1316 1317 if (priv->dmaops && 1318 priv->dmaops->altera_dtype == ALTERA_DTYPE_SGDMA) { 1319 /* Get the mapped address to the SGDMA descriptor memory */ 1320 ret = request_and_map(pdev, "s1", &dma_res, &descmap); 1321 if (ret) 1322 goto err_free_netdev; 1323 1324 /* Start of that memory is for transmit descriptors */ 1325 priv->tx_dma_desc = descmap; 1326 1327 /* First half is for tx descriptors, other half for tx */ 1328 priv->txdescmem = resource_size(dma_res)/2; 1329 1330 priv->txdescmem_busaddr = (dma_addr_t)dma_res->start; 1331 1332 priv->rx_dma_desc = (void __iomem *)((uintptr_t)(descmap + 1333 priv->txdescmem)); 1334 priv->rxdescmem = resource_size(dma_res)/2; 1335 priv->rxdescmem_busaddr = dma_res->start; 1336 priv->rxdescmem_busaddr += priv->txdescmem; 1337 1338 if (upper_32_bits(priv->rxdescmem_busaddr)) { 1339 dev_dbg(priv->device, 1340 "SGDMA bus addresses greater than 32-bits\n"); 1341 goto err_free_netdev; 1342 } 1343 if (upper_32_bits(priv->txdescmem_busaddr)) { 1344 dev_dbg(priv->device, 1345 "SGDMA bus addresses greater than 32-bits\n"); 1346 goto err_free_netdev; 1347 } 1348 } else if (priv->dmaops && 1349 priv->dmaops->altera_dtype == ALTERA_DTYPE_MSGDMA) { 1350 ret = request_and_map(pdev, "rx_resp", &dma_res, 1351 &priv->rx_dma_resp); 1352 if (ret) 1353 goto err_free_netdev; 1354 1355 ret = request_and_map(pdev, "tx_desc", &dma_res, 1356 &priv->tx_dma_desc); 1357 if (ret) 1358 goto err_free_netdev; 1359 1360 priv->txdescmem = resource_size(dma_res); 1361 priv->txdescmem_busaddr = dma_res->start; 1362 1363 ret = request_and_map(pdev, "rx_desc", &dma_res, 1364 &priv->rx_dma_desc); 1365 if (ret) 1366 goto err_free_netdev; 1367 1368 priv->rxdescmem = resource_size(dma_res); 1369 priv->rxdescmem_busaddr = dma_res->start; 1370 1371 } else { 1372 goto err_free_netdev; 1373 } 1374 1375 if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask))) 1376 dma_set_coherent_mask(priv->device, 1377 DMA_BIT_MASK(priv->dmaops->dmamask)); 1378 else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32))) 1379 dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32)); 1380 else 1381 goto err_free_netdev; 1382 1383 /* MAC address space */ 1384 ret = request_and_map(pdev, "control_port", &control_port, 1385 (void __iomem **)&priv->mac_dev); 1386 if (ret) 1387 goto err_free_netdev; 1388 1389 /* xSGDMA Rx Dispatcher address space */ 1390 ret = request_and_map(pdev, "rx_csr", &dma_res, 1391 &priv->rx_dma_csr); 1392 if (ret) 1393 goto err_free_netdev; 1394 1395 1396 /* xSGDMA Tx Dispatcher address space */ 1397 ret = request_and_map(pdev, "tx_csr", &dma_res, 1398 &priv->tx_dma_csr); 1399 if (ret) 1400 goto err_free_netdev; 1401 1402 1403 /* Rx IRQ */ 1404 priv->rx_irq = platform_get_irq_byname(pdev, "rx_irq"); 1405 if (priv->rx_irq == -ENXIO) { 1406 dev_err(&pdev->dev, "cannot obtain Rx IRQ\n"); 1407 ret = -ENXIO; 1408 goto err_free_netdev; 1409 } 1410 1411 /* Tx IRQ */ 1412 priv->tx_irq = platform_get_irq_byname(pdev, "tx_irq"); 1413 if (priv->tx_irq == -ENXIO) { 1414 dev_err(&pdev->dev, "cannot obtain Tx IRQ\n"); 1415 ret = -ENXIO; 1416 goto err_free_netdev; 1417 } 1418 1419 /* get FIFO depths from device tree */ 1420 if (of_property_read_u32(pdev->dev.of_node, "rx-fifo-depth", 1421 &priv->rx_fifo_depth)) { 1422 dev_err(&pdev->dev, "cannot obtain rx-fifo-depth\n"); 1423 ret = -ENXIO; 1424 goto err_free_netdev; 1425 } 1426 1427 if (of_property_read_u32(pdev->dev.of_node, "tx-fifo-depth", 1428 &priv->tx_fifo_depth)) { 1429 dev_err(&pdev->dev, "cannot obtain tx-fifo-depth\n"); 1430 ret = -ENXIO; 1431 goto err_free_netdev; 1432 } 1433 1434 /* get hash filter settings for this instance */ 1435 priv->hash_filter = 1436 of_property_read_bool(pdev->dev.of_node, 1437 "altr,has-hash-multicast-filter"); 1438 1439 /* Set hash filter to not set for now until the 1440 * multicast filter receive issue is debugged 1441 */ 1442 priv->hash_filter = 0; 1443 1444 /* get supplemental address settings for this instance */ 1445 priv->added_unicast = 1446 of_property_read_bool(pdev->dev.of_node, 1447 "altr,has-supplementary-unicast"); 1448 1449 /* Max MTU is 1500, ETH_DATA_LEN */ 1450 priv->max_mtu = ETH_DATA_LEN; 1451 1452 /* Get the max mtu from the device tree. Note that the 1453 * "max-frame-size" parameter is actually max mtu. Definition 1454 * in the ePAPR v1.1 spec and usage differ, so go with usage. 1455 */ 1456 of_property_read_u32(pdev->dev.of_node, "max-frame-size", 1457 &priv->max_mtu); 1458 1459 /* The DMA buffer size already accounts for an alignment bias 1460 * to avoid unaligned access exceptions for the NIOS processor, 1461 */ 1462 priv->rx_dma_buf_sz = ALTERA_RXDMABUFFER_SIZE; 1463 1464 /* get default MAC address from device tree */ 1465 macaddr = of_get_mac_address(pdev->dev.of_node); 1466 if (macaddr) 1467 ether_addr_copy(ndev->dev_addr, macaddr); 1468 else 1469 eth_hw_addr_random(ndev); 1470 1471 /* get phy addr and create mdio */ 1472 ret = altera_tse_phy_get_addr_mdio_create(ndev); 1473 1474 if (ret) 1475 goto err_free_netdev; 1476 1477 /* initialize netdev */ 1478 ndev->mem_start = control_port->start; 1479 ndev->mem_end = control_port->end; 1480 ndev->netdev_ops = &altera_tse_netdev_ops; 1481 altera_tse_set_ethtool_ops(ndev); 1482 1483 altera_tse_netdev_ops.ndo_set_rx_mode = tse_set_rx_mode; 1484 1485 if (priv->hash_filter) 1486 altera_tse_netdev_ops.ndo_set_rx_mode = 1487 tse_set_rx_mode_hashfilter; 1488 1489 /* Scatter/gather IO is not supported, 1490 * so it is turned off 1491 */ 1492 ndev->hw_features &= ~NETIF_F_SG; 1493 ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA; 1494 1495 /* VLAN offloading of tagging, stripping and filtering is not 1496 * supported by hardware, but driver will accommodate the 1497 * extra 4-byte VLAN tag for processing by upper layers 1498 */ 1499 ndev->features |= NETIF_F_HW_VLAN_CTAG_RX; 1500 1501 /* setup NAPI interface */ 1502 netif_napi_add(ndev, &priv->napi, tse_poll, NAPI_POLL_WEIGHT); 1503 1504 spin_lock_init(&priv->mac_cfg_lock); 1505 spin_lock_init(&priv->tx_lock); 1506 spin_lock_init(&priv->rxdma_irq_lock); 1507 1508 netif_carrier_off(ndev); 1509 ret = register_netdev(ndev); 1510 if (ret) { 1511 dev_err(&pdev->dev, "failed to register TSE net device\n"); 1512 goto err_register_netdev; 1513 } 1514 1515 platform_set_drvdata(pdev, ndev); 1516 1517 priv->revision = ioread32(&priv->mac_dev->megacore_revision); 1518 1519 if (netif_msg_probe(priv)) 1520 dev_info(&pdev->dev, "Altera TSE MAC version %d.%d at 0x%08lx irq %d/%d\n", 1521 (priv->revision >> 8) & 0xff, 1522 priv->revision & 0xff, 1523 (unsigned long) control_port->start, priv->rx_irq, 1524 priv->tx_irq); 1525 1526 ret = init_phy(ndev); 1527 if (ret != 0) { 1528 netdev_err(ndev, "Cannot attach to PHY (error: %d)\n", ret); 1529 goto err_init_phy; 1530 } 1531 return 0; 1532 1533 err_init_phy: 1534 unregister_netdev(ndev); 1535 err_register_netdev: 1536 netif_napi_del(&priv->napi); 1537 altera_tse_mdio_destroy(ndev); 1538 err_free_netdev: 1539 free_netdev(ndev); 1540 return ret; 1541 } 1542 1543 /* Remove Altera TSE MAC device 1544 */ 1545 static int altera_tse_remove(struct platform_device *pdev) 1546 { 1547 struct net_device *ndev = platform_get_drvdata(pdev); 1548 struct altera_tse_private *priv = netdev_priv(ndev); 1549 1550 if (priv->phydev) 1551 phy_disconnect(priv->phydev); 1552 1553 platform_set_drvdata(pdev, NULL); 1554 altera_tse_mdio_destroy(ndev); 1555 unregister_netdev(ndev); 1556 free_netdev(ndev); 1557 1558 return 0; 1559 } 1560 1561 static const struct altera_dmaops altera_dtype_sgdma = { 1562 .altera_dtype = ALTERA_DTYPE_SGDMA, 1563 .dmamask = 32, 1564 .reset_dma = sgdma_reset, 1565 .enable_txirq = sgdma_enable_txirq, 1566 .enable_rxirq = sgdma_enable_rxirq, 1567 .disable_txirq = sgdma_disable_txirq, 1568 .disable_rxirq = sgdma_disable_rxirq, 1569 .clear_txirq = sgdma_clear_txirq, 1570 .clear_rxirq = sgdma_clear_rxirq, 1571 .tx_buffer = sgdma_tx_buffer, 1572 .tx_completions = sgdma_tx_completions, 1573 .add_rx_desc = sgdma_add_rx_desc, 1574 .get_rx_status = sgdma_rx_status, 1575 .init_dma = sgdma_initialize, 1576 .uninit_dma = sgdma_uninitialize, 1577 .start_rxdma = sgdma_start_rxdma, 1578 }; 1579 1580 static const struct altera_dmaops altera_dtype_msgdma = { 1581 .altera_dtype = ALTERA_DTYPE_MSGDMA, 1582 .dmamask = 64, 1583 .reset_dma = msgdma_reset, 1584 .enable_txirq = msgdma_enable_txirq, 1585 .enable_rxirq = msgdma_enable_rxirq, 1586 .disable_txirq = msgdma_disable_txirq, 1587 .disable_rxirq = msgdma_disable_rxirq, 1588 .clear_txirq = msgdma_clear_txirq, 1589 .clear_rxirq = msgdma_clear_rxirq, 1590 .tx_buffer = msgdma_tx_buffer, 1591 .tx_completions = msgdma_tx_completions, 1592 .add_rx_desc = msgdma_add_rx_desc, 1593 .get_rx_status = msgdma_rx_status, 1594 .init_dma = msgdma_initialize, 1595 .uninit_dma = msgdma_uninitialize, 1596 .start_rxdma = msgdma_start_rxdma, 1597 }; 1598 1599 static const struct of_device_id altera_tse_ids[] = { 1600 { .compatible = "altr,tse-msgdma-1.0", .data = &altera_dtype_msgdma, }, 1601 { .compatible = "altr,tse-1.0", .data = &altera_dtype_sgdma, }, 1602 { .compatible = "ALTR,tse-1.0", .data = &altera_dtype_sgdma, }, 1603 {}, 1604 }; 1605 MODULE_DEVICE_TABLE(of, altera_tse_ids); 1606 1607 static struct platform_driver altera_tse_driver = { 1608 .probe = altera_tse_probe, 1609 .remove = altera_tse_remove, 1610 .suspend = NULL, 1611 .resume = NULL, 1612 .driver = { 1613 .name = ALTERA_TSE_RESOURCE_NAME, 1614 .of_match_table = altera_tse_ids, 1615 }, 1616 }; 1617 1618 module_platform_driver(altera_tse_driver); 1619 1620 MODULE_AUTHOR("Altera Corporation"); 1621 MODULE_DESCRIPTION("Altera Triple Speed Ethernet MAC driver"); 1622 MODULE_LICENSE("GPL v2"); 1623