1068 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.4 *5 * Copyright (c) 2003 Intracom S.A.6 * by Pantelis Antoniou <panto@intracom.gr>7 *8 * 2005 (c) MontaVista Software, Inc.9 * Vitaly Bordug <vbordug@ru.mvista.com>10 *11 * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>12 * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>13 */14 15#include <linux/module.h>16#include <linux/kernel.h>17#include <linux/types.h>18#include <linux/string.h>19#include <linux/ptrace.h>20#include <linux/errno.h>21#include <linux/ioport.h>22#include <linux/slab.h>23#include <linux/interrupt.h>24#include <linux/delay.h>25#include <linux/netdevice.h>26#include <linux/etherdevice.h>27#include <linux/skbuff.h>28#include <linux/spinlock.h>29#include <linux/ethtool.h>30#include <linux/bitops.h>31#include <linux/fs.h>32#include <linux/platform_device.h>33#include <linux/phy.h>34#include <linux/phylink.h>35#include <linux/property.h>36#include <linux/of.h>37#include <linux/of_mdio.h>38#include <linux/of_net.h>39#include <linux/pgtable.h>40#include <linux/rtnetlink.h>41 42#include <linux/vmalloc.h>43#include <asm/irq.h>44#include <linux/uaccess.h>45 46#include "fs_enet.h"47 48/*************************************************/49 50MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>");51MODULE_DESCRIPTION("Freescale Ethernet Driver");52MODULE_LICENSE("GPL");53 54static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */55module_param(fs_enet_debug, int, 0);56MODULE_PARM_DESC(fs_enet_debug,57 "Freescale bitmapped debugging message enable value");58 59#define RX_RING_SIZE 3260#define TX_RING_SIZE 6461 62#ifdef CONFIG_NET_POLL_CONTROLLER63static void fs_enet_netpoll(struct net_device *dev);64#endif65 66static void fs_set_multicast_list(struct net_device *dev)67{68 struct fs_enet_private *fep = netdev_priv(dev);69 70 (*fep->ops->set_multicast_list)(dev);71}72 73static int fs_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)74{75 struct fs_enet_private *fep = netdev_priv(dev);76 77 return phylink_mii_ioctl(fep->phylink, ifr, cmd);78}79 80static void skb_align(struct sk_buff *skb, int align)81{82 int off = ((unsigned long)skb->data) & (align - 1);83 84 if (off)85 skb_reserve(skb, align - off);86}87 88/* NAPI function */89static int fs_enet_napi(struct napi_struct *napi, int budget)90{91 struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);92 const struct fs_platform_info *fpi = fep->fpi;93 struct net_device *dev = fep->ndev;94 int curidx, dirtyidx, received = 0;95 int do_wake = 0, do_restart = 0;96 int tx_left = TX_RING_SIZE;97 struct sk_buff *skb, *skbn;98 cbd_t __iomem *bdp;99 u16 pkt_len, sc;100 101 spin_lock(&fep->tx_lock);102 bdp = fep->dirty_tx;103 104 /* clear status bits for napi*/105 (*fep->ops->napi_clear_event)(dev);106 107 while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0 && tx_left) {108 dirtyidx = bdp - fep->tx_bd_base;109 110 if (fep->tx_free == fep->tx_ring)111 break;112 113 skb = fep->tx_skbuff[dirtyidx];114 115 /* Check for errors. */116 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |117 BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {118 if (sc & BD_ENET_TX_HB) /* No heartbeat */119 dev->stats.tx_heartbeat_errors++;120 if (sc & BD_ENET_TX_LC) /* Late collision */121 dev->stats.tx_window_errors++;122 if (sc & BD_ENET_TX_RL) /* Retrans limit */123 dev->stats.tx_aborted_errors++;124 if (sc & BD_ENET_TX_UN) /* Underrun */125 dev->stats.tx_fifo_errors++;126 if (sc & BD_ENET_TX_CSL) /* Carrier lost */127 dev->stats.tx_carrier_errors++;128 129 if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {130 dev->stats.tx_errors++;131 do_restart = 1;132 }133 } else {134 dev->stats.tx_packets++;135 }136 137 if (sc & BD_ENET_TX_READY) {138 dev_warn(fep->dev,139 "HEY! Enet xmit interrupt and TX_READY.\n");140 }141 142 /* Deferred means some collisions occurred during transmit,143 * but we eventually sent the packet OK.144 */145 if (sc & BD_ENET_TX_DEF)146 dev->stats.collisions++;147 148 /* unmap */149 if (fep->mapped_as_page[dirtyidx])150 dma_unmap_page(fep->dev, CBDR_BUFADDR(bdp),151 CBDR_DATLEN(bdp), DMA_TO_DEVICE);152 else153 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),154 CBDR_DATLEN(bdp), DMA_TO_DEVICE);155 156 /* Free the sk buffer associated with this last transmit. */157 if (skb) {158 dev_kfree_skb(skb);159 fep->tx_skbuff[dirtyidx] = NULL;160 }161 162 /* Update pointer to next buffer descriptor to be transmitted.163 */164 if ((sc & BD_ENET_TX_WRAP) == 0)165 bdp++;166 else167 bdp = fep->tx_bd_base;168 169 /* Since we have freed up a buffer, the ring is no longer full.170 */171 if (++fep->tx_free == MAX_SKB_FRAGS)172 do_wake = 1;173 tx_left--;174 }175 176 fep->dirty_tx = bdp;177 178 if (do_restart)179 (*fep->ops->tx_restart)(dev);180 181 spin_unlock(&fep->tx_lock);182 183 if (do_wake)184 netif_wake_queue(dev);185 186 /* First, grab all of the stats for the incoming packet.187 * These get messed up if we get called due to a busy condition.188 */189 bdp = fep->cur_rx;190 191 while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0 &&192 received < budget) {193 curidx = bdp - fep->rx_bd_base;194 195 /* Since we have allocated space to hold a complete frame,196 * the last indicator should be set.197 */198 if ((sc & BD_ENET_RX_LAST) == 0)199 dev_warn(fep->dev, "rcv is not +last\n");200 201 /* Check for errors. */202 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |203 BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {204 dev->stats.rx_errors++;205 /* Frame too long or too short. */206 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))207 dev->stats.rx_length_errors++;208 /* Frame alignment */209 if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))210 dev->stats.rx_frame_errors++;211 /* CRC Error */212 if (sc & BD_ENET_RX_CR)213 dev->stats.rx_crc_errors++;214 /* FIFO overrun */215 if (sc & BD_ENET_RX_OV)216 dev->stats.rx_crc_errors++;217 218 skbn = fep->rx_skbuff[curidx];219 } else {220 skb = fep->rx_skbuff[curidx];221 222 /* Process the incoming frame */223 dev->stats.rx_packets++;224 pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */225 dev->stats.rx_bytes += pkt_len + 4;226 227 if (pkt_len <= fpi->rx_copybreak) {228 /* +2 to make IP header L1 cache aligned */229 skbn = netdev_alloc_skb(dev, pkt_len + 2);230 if (skbn) {231 skb_reserve(skbn, 2); /* align IP header */232 skb_copy_from_linear_data(skb, skbn->data,233 pkt_len);234 swap(skb, skbn);235 dma_sync_single_for_cpu(fep->dev,236 CBDR_BUFADDR(bdp),237 L1_CACHE_ALIGN(pkt_len),238 DMA_FROM_DEVICE);239 }240 } else {241 skbn = netdev_alloc_skb(dev, ENET_RX_FRSIZE);242 243 if (skbn) {244 dma_addr_t dma;245 246 skb_align(skbn, ENET_RX_ALIGN);247 248 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),249 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),250 DMA_FROM_DEVICE);251 252 dma = dma_map_single(fep->dev, skbn->data,253 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),254 DMA_FROM_DEVICE);255 CBDW_BUFADDR(bdp, dma);256 }257 }258 259 if (skbn) {260 skb_put(skb, pkt_len); /* Make room */261 skb->protocol = eth_type_trans(skb, dev);262 received++;263 netif_receive_skb(skb);264 } else {265 dev->stats.rx_dropped++;266 skbn = skb;267 }268 }269 270 fep->rx_skbuff[curidx] = skbn;271 CBDW_DATLEN(bdp, 0);272 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);273 274 /* Update BD pointer to next entry */275 if ((sc & BD_ENET_RX_WRAP) == 0)276 bdp++;277 else278 bdp = fep->rx_bd_base;279 280 (*fep->ops->rx_bd_done)(dev);281 }282 283 fep->cur_rx = bdp;284 285 if (received < budget && tx_left) {286 /* done */287 napi_complete_done(napi, received);288 (*fep->ops->napi_enable)(dev);289 290 return received;291 }292 293 return budget;294}295 296/* The interrupt handler.297 * This is called from the MPC core interrupt.298 */299static irqreturn_t300fs_enet_interrupt(int irq, void *dev_id)301{302 struct net_device *dev = dev_id;303 u32 int_events, int_clr_events;304 struct fs_enet_private *fep;305 int nr, napi_ok, handled;306 307 fep = netdev_priv(dev);308 309 nr = 0;310 while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {311 nr++;312 313 int_clr_events = int_events;314 int_clr_events &= ~fep->ev_napi;315 316 (*fep->ops->clear_int_events)(dev, int_clr_events);317 318 if (int_events & fep->ev_err)319 (*fep->ops->ev_error)(dev, int_events);320 321 if (int_events & fep->ev) {322 napi_ok = napi_schedule_prep(&fep->napi);323 324 (*fep->ops->napi_disable)(dev);325 (*fep->ops->clear_int_events)(dev, fep->ev_napi);326 327 /* NOTE: it is possible for FCCs in NAPI mode328 * to submit a spurious interrupt while in poll329 */330 if (napi_ok)331 __napi_schedule(&fep->napi);332 }333 }334 335 handled = nr > 0;336 return IRQ_RETVAL(handled);337}338 339void fs_init_bds(struct net_device *dev)340{341 struct fs_enet_private *fep = netdev_priv(dev);342 struct sk_buff *skb;343 cbd_t __iomem *bdp;344 int i;345 346 fs_cleanup_bds(dev);347 348 fep->dirty_tx = fep->tx_bd_base;349 fep->cur_tx = fep->tx_bd_base;350 fep->tx_free = fep->tx_ring;351 fep->cur_rx = fep->rx_bd_base;352 353 /* Initialize the receive buffer descriptors */354 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {355 skb = netdev_alloc_skb(dev, ENET_RX_FRSIZE);356 if (!skb)357 break;358 359 skb_align(skb, ENET_RX_ALIGN);360 fep->rx_skbuff[i] = skb;361 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skb->data,362 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),363 DMA_FROM_DEVICE));364 CBDW_DATLEN(bdp, 0); /* zero */365 CBDW_SC(bdp, BD_ENET_RX_EMPTY |366 ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));367 }368 369 /* if we failed, fillup remainder */370 for (; i < fep->rx_ring; i++, bdp++) {371 fep->rx_skbuff[i] = NULL;372 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);373 }374 375 /* ...and the same for transmit. */376 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {377 fep->tx_skbuff[i] = NULL;378 CBDW_BUFADDR(bdp, 0);379 CBDW_DATLEN(bdp, 0);380 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);381 }382}383 384void fs_cleanup_bds(struct net_device *dev)385{386 struct fs_enet_private *fep = netdev_priv(dev);387 struct sk_buff *skb;388 cbd_t __iomem *bdp;389 int i;390 391 /* Reset SKB transmit buffers. */392 for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {393 skb = fep->tx_skbuff[i];394 if (!skb)395 continue;396 397 /* unmap */398 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),399 skb->len, DMA_TO_DEVICE);400 401 fep->tx_skbuff[i] = NULL;402 dev_kfree_skb(skb);403 }404 405 /* Reset SKB receive buffers */406 for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {407 skb = fep->rx_skbuff[i];408 if (!skb)409 continue;410 411 /* unmap */412 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),413 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),414 DMA_FROM_DEVICE);415 416 fep->rx_skbuff[i] = NULL;417 418 dev_kfree_skb(skb);419 }420}421 422#ifdef CONFIG_FS_ENET_MPC5121_FEC423/* MPC5121 FEC requires 4-byte alignment for TX data buffer! */424static struct sk_buff *tx_skb_align_workaround(struct net_device *dev,425 struct sk_buff *skb)426{427 struct sk_buff *new_skb;428 429 if (skb_linearize(skb))430 return NULL;431 432 /* Alloc new skb */433 new_skb = netdev_alloc_skb(dev, skb->len + 4);434 if (!new_skb)435 return NULL;436 437 /* Make sure new skb is properly aligned */438 skb_align(new_skb, 4);439 440 /* Copy data to new skb ... */441 skb_copy_from_linear_data(skb, new_skb->data, skb->len);442 skb_put(new_skb, skb->len);443 444 /* ... and free an old one */445 dev_kfree_skb_any(skb);446 447 return new_skb;448}449#endif450 451static netdev_tx_t452fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)453{454 struct fs_enet_private *fep = netdev_priv(dev);455 int curidx, nr_frags, len;456 cbd_t __iomem *bdp;457 skb_frag_t *frag;458 u16 sc;459#ifdef CONFIG_FS_ENET_MPC5121_FEC460 int i, is_aligned = 1;461 462 if (!IS_ALIGNED((unsigned long)skb->data, 4)) {463 is_aligned = 0;464 } else {465 nr_frags = skb_shinfo(skb)->nr_frags;466 frag = skb_shinfo(skb)->frags;467 for (i = 0; i < nr_frags; i++, frag++) {468 if (!IS_ALIGNED(skb_frag_off(frag), 4)) {469 is_aligned = 0;470 break;471 }472 }473 }474 475 if (!is_aligned) {476 skb = tx_skb_align_workaround(dev, skb);477 if (!skb) {478 /* We have lost packet due to memory allocation error479 * in tx_skb_align_workaround(). Hopefully original480 * skb is still valid, so try transmit it later.481 */482 return NETDEV_TX_BUSY;483 }484 }485#endif486 487 spin_lock(&fep->tx_lock);488 489 /* Fill in a Tx ring entry */490 bdp = fep->cur_tx;491 492 nr_frags = skb_shinfo(skb)->nr_frags;493 if (fep->tx_free <= nr_frags || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {494 netif_stop_queue(dev);495 spin_unlock(&fep->tx_lock);496 497 /* Ooops. All transmit buffers are full. Bail out.498 * This should not happen, since the tx queue should be stopped.499 */500 dev_warn(fep->dev, "tx queue full!.\n");501 return NETDEV_TX_BUSY;502 }503 504 curidx = bdp - fep->tx_bd_base;505 506 len = skb->len;507 dev->stats.tx_bytes += len;508 if (nr_frags)509 len -= skb->data_len;510 511 fep->tx_free -= nr_frags + 1;512 /* Push the data cache so the CPM does not get stale memory data.513 */514 CBDW_BUFADDR(bdp, dma_map_single(fep->dev,515 skb->data, len, DMA_TO_DEVICE));516 CBDW_DATLEN(bdp, len);517 518 fep->mapped_as_page[curidx] = 0;519 frag = skb_shinfo(skb)->frags;520 while (nr_frags) {521 CBDC_SC(bdp,522 BD_ENET_TX_STATS | BD_ENET_TX_INTR | BD_ENET_TX_LAST |523 BD_ENET_TX_TC);524 CBDS_SC(bdp, BD_ENET_TX_READY);525 526 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0) {527 bdp++;528 curidx++;529 } else {530 bdp = fep->tx_bd_base;531 curidx = 0;532 }533 534 len = skb_frag_size(frag);535 CBDW_BUFADDR(bdp, skb_frag_dma_map(fep->dev, frag, 0, len,536 DMA_TO_DEVICE));537 CBDW_DATLEN(bdp, len);538 539 fep->tx_skbuff[curidx] = NULL;540 fep->mapped_as_page[curidx] = 1;541 542 frag++;543 nr_frags--;544 }545 546 /* Trigger transmission start */547 sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |548 BD_ENET_TX_LAST | BD_ENET_TX_TC;549 550 /* note that while FEC does not have this bit551 * it marks it as available for software use552 * yay for hw reuse :)553 */554 if (skb->len <= 60)555 sc |= BD_ENET_TX_PAD;556 557 CBDC_SC(bdp, BD_ENET_TX_STATS);558 CBDS_SC(bdp, sc);559 560 /* Save skb pointer. */561 fep->tx_skbuff[curidx] = skb;562 563 /* If this was the last BD in the ring, start at the beginning again. */564 if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)565 bdp++;566 else567 bdp = fep->tx_bd_base;568 569 fep->cur_tx = bdp;570 571 if (fep->tx_free < MAX_SKB_FRAGS)572 netif_stop_queue(dev);573 574 skb_tx_timestamp(skb);575 576 (*fep->ops->tx_kickstart)(dev);577 578 spin_unlock(&fep->tx_lock);579 580 return NETDEV_TX_OK;581}582 583static void fs_timeout_work(struct work_struct *work)584{585 struct fs_enet_private *fep = container_of(work, struct fs_enet_private,586 timeout_work);587 struct net_device *dev = fep->ndev;588 unsigned long flags;589 int wake = 0;590 591 dev->stats.tx_errors++;592 593 /* In the event a timeout was detected, but the netdev is brought down594 * shortly after, it no longer makes sense to try to recover from the595 * timeout. netif_running() will return false when called from the596 * .ndo_close() callback. Calling the following recovery code while597 * called from .ndo_close() could deadlock on rtnl.598 */599 if (!netif_running(dev))600 return;601 602 rtnl_lock();603 phylink_stop(fep->phylink);604 phylink_start(fep->phylink);605 rtnl_unlock();606 607 spin_lock_irqsave(&fep->lock, flags);608 wake = fep->tx_free >= MAX_SKB_FRAGS &&609 !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);610 spin_unlock_irqrestore(&fep->lock, flags);611 612 if (wake)613 netif_wake_queue(dev);614}615 616static void fs_timeout(struct net_device *dev, unsigned int txqueue)617{618 struct fs_enet_private *fep = netdev_priv(dev);619 620 schedule_work(&fep->timeout_work);621}622 623static void fs_mac_link_up(struct phylink_config *config,624 struct phy_device *phy,625 unsigned int mode, phy_interface_t interface,626 int speed, int duplex,627 bool tx_pause, bool rx_pause)628{629 struct net_device *ndev = to_net_dev(config->dev);630 struct fs_enet_private *fep = netdev_priv(ndev);631 unsigned long flags;632 633 spin_lock_irqsave(&fep->lock, flags);634 fep->ops->restart(ndev, interface, speed, duplex);635 spin_unlock_irqrestore(&fep->lock, flags);636}637 638static void fs_mac_link_down(struct phylink_config *config,639 unsigned int mode, phy_interface_t interface)640{641 struct net_device *ndev = to_net_dev(config->dev);642 struct fs_enet_private *fep = netdev_priv(ndev);643 unsigned long flags;644 645 spin_lock_irqsave(&fep->lock, flags);646 fep->ops->stop(ndev);647 spin_unlock_irqrestore(&fep->lock, flags);648}649 650static void fs_mac_config(struct phylink_config *config, unsigned int mode,651 const struct phylink_link_state *state)652{653 /* Nothing to do */654}655 656static int fs_enet_open(struct net_device *dev)657{658 struct fs_enet_private *fep = netdev_priv(dev);659 int r;660 int err;661 662 /* to initialize the fep->cur_rx,...663 * not doing this, will cause a crash in fs_enet_napi664 */665 fs_init_bds(fep->ndev);666 667 napi_enable(&fep->napi);668 669 /* Install our interrupt handler. */670 r = request_irq(fep->interrupt, fs_enet_interrupt, IRQF_SHARED,671 "fs_enet-mac", dev);672 if (r != 0) {673 dev_err(fep->dev, "Could not allocate FS_ENET IRQ!");674 napi_disable(&fep->napi);675 return -EINVAL;676 }677 678 err = phylink_of_phy_connect(fep->phylink, fep->dev->of_node, 0);679 if (err) {680 free_irq(fep->interrupt, dev);681 napi_disable(&fep->napi);682 return err;683 }684 phylink_start(fep->phylink);685 686 netif_start_queue(dev);687 688 return 0;689}690 691static int fs_enet_close(struct net_device *dev)692{693 struct fs_enet_private *fep = netdev_priv(dev);694 unsigned long flags;695 696 netif_stop_queue(dev);697 napi_disable(&fep->napi);698 cancel_work(&fep->timeout_work);699 phylink_stop(fep->phylink);700 701 spin_lock_irqsave(&fep->lock, flags);702 spin_lock(&fep->tx_lock);703 (*fep->ops->stop)(dev);704 spin_unlock(&fep->tx_lock);705 spin_unlock_irqrestore(&fep->lock, flags);706 phylink_disconnect_phy(fep->phylink);707 708 /* release any irqs */709 free_irq(fep->interrupt, dev);710 711 return 0;712}713 714static void fs_get_drvinfo(struct net_device *dev,715 struct ethtool_drvinfo *info)716{717 strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));718}719 720static int fs_get_regs_len(struct net_device *dev)721{722 struct fs_enet_private *fep = netdev_priv(dev);723 724 return (*fep->ops->get_regs_len)(dev);725}726 727static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,728 void *p)729{730 struct fs_enet_private *fep = netdev_priv(dev);731 unsigned long flags;732 int r, len;733 734 len = regs->len;735 736 spin_lock_irqsave(&fep->lock, flags);737 r = (*fep->ops->get_regs)(dev, p, &len);738 spin_unlock_irqrestore(&fep->lock, flags);739 740 if (r == 0)741 regs->version = 0;742}743 744static u32 fs_get_msglevel(struct net_device *dev)745{746 struct fs_enet_private *fep = netdev_priv(dev);747 748 return fep->msg_enable;749}750 751static void fs_set_msglevel(struct net_device *dev, u32 value)752{753 struct fs_enet_private *fep = netdev_priv(dev);754 755 fep->msg_enable = value;756}757 758static int fs_get_tunable(struct net_device *dev,759 const struct ethtool_tunable *tuna, void *data)760{761 struct fs_enet_private *fep = netdev_priv(dev);762 struct fs_platform_info *fpi = fep->fpi;763 int ret = 0;764 765 switch (tuna->id) {766 case ETHTOOL_RX_COPYBREAK:767 *(u32 *)data = fpi->rx_copybreak;768 break;769 default:770 ret = -EINVAL;771 break;772 }773 774 return ret;775}776 777static int fs_set_tunable(struct net_device *dev,778 const struct ethtool_tunable *tuna, const void *data)779{780 struct fs_enet_private *fep = netdev_priv(dev);781 struct fs_platform_info *fpi = fep->fpi;782 int ret = 0;783 784 switch (tuna->id) {785 case ETHTOOL_RX_COPYBREAK:786 fpi->rx_copybreak = *(u32 *)data;787 break;788 default:789 ret = -EINVAL;790 break;791 }792 793 return ret;794}795 796static int fs_ethtool_set_link_ksettings(struct net_device *dev,797 const struct ethtool_link_ksettings *cmd)798{799 struct fs_enet_private *fep = netdev_priv(dev);800 801 return phylink_ethtool_ksettings_set(fep->phylink, cmd);802}803 804static int fs_ethtool_get_link_ksettings(struct net_device *dev,805 struct ethtool_link_ksettings *cmd)806{807 struct fs_enet_private *fep = netdev_priv(dev);808 809 return phylink_ethtool_ksettings_get(fep->phylink, cmd);810}811 812static const struct ethtool_ops fs_ethtool_ops = {813 .get_drvinfo = fs_get_drvinfo,814 .get_regs_len = fs_get_regs_len,815 .nway_reset = phy_ethtool_nway_reset,816 .get_link = ethtool_op_get_link,817 .get_msglevel = fs_get_msglevel,818 .set_msglevel = fs_set_msglevel,819 .get_regs = fs_get_regs,820 .get_ts_info = ethtool_op_get_ts_info,821 .get_link_ksettings = fs_ethtool_get_link_ksettings,822 .set_link_ksettings = fs_ethtool_set_link_ksettings,823 .get_tunable = fs_get_tunable,824 .set_tunable = fs_set_tunable,825};826 827#ifdef CONFIG_FS_ENET_HAS_FEC828#define IS_FEC(ops) ((ops) == &fs_fec_ops)829#else830#define IS_FEC(ops) 0831#endif832 833static const struct net_device_ops fs_enet_netdev_ops = {834 .ndo_open = fs_enet_open,835 .ndo_stop = fs_enet_close,836 .ndo_start_xmit = fs_enet_start_xmit,837 .ndo_tx_timeout = fs_timeout,838 .ndo_set_rx_mode = fs_set_multicast_list,839 .ndo_eth_ioctl = fs_eth_ioctl,840 .ndo_validate_addr = eth_validate_addr,841 .ndo_set_mac_address = eth_mac_addr,842#ifdef CONFIG_NET_POLL_CONTROLLER843 .ndo_poll_controller = fs_enet_netpoll,844#endif845};846 847static const struct phylink_mac_ops fs_enet_phylink_mac_ops = {848 .mac_config = fs_mac_config,849 .mac_link_down = fs_mac_link_down,850 .mac_link_up = fs_mac_link_up,851};852 853static int fs_enet_probe(struct platform_device *ofdev)854{855 int privsize, len, ret = -ENODEV;856 struct fs_platform_info *fpi;857 struct fs_enet_private *fep;858 phy_interface_t phy_mode;859 const struct fs_ops *ops;860 struct net_device *ndev;861 struct phylink *phylink;862 const u32 *data;863 struct clk *clk;864 865 ops = device_get_match_data(&ofdev->dev);866 if (!ops)867 return -EINVAL;868 869 fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);870 if (!fpi)871 return -ENOMEM;872 873 if (!IS_FEC(ops)) {874 data = of_get_property(ofdev->dev.of_node, "fsl,cpm-command", &len);875 if (!data || len != 4)876 goto out_free_fpi;877 878 fpi->cp_command = *data;879 }880 881 ret = of_get_phy_mode(ofdev->dev.of_node, &phy_mode);882 if (ret) {883 /* For compatibility, if the mode isn't specified in DT,884 * assume MII885 */886 phy_mode = PHY_INTERFACE_MODE_MII;887 }888 889 fpi->rx_ring = RX_RING_SIZE;890 fpi->tx_ring = TX_RING_SIZE;891 fpi->rx_copybreak = 240;892 fpi->napi_weight = 17;893 894 /* make clock lookup non-fatal (the driver is shared among platforms),895 * but require enable to succeed when a clock was specified/found,896 * keep a reference to the clock upon successful acquisition897 */898 clk = devm_clk_get_optional_enabled(&ofdev->dev, "per");899 if (IS_ERR(clk))900 goto out_free_fpi;901 902 privsize = sizeof(*fep) +903 sizeof(struct sk_buff **) *904 (fpi->rx_ring + fpi->tx_ring) +905 sizeof(char) * fpi->tx_ring;906 907 ndev = alloc_etherdev(privsize);908 if (!ndev) {909 ret = -ENOMEM;910 goto out_free_fpi;911 }912 913 SET_NETDEV_DEV(ndev, &ofdev->dev);914 platform_set_drvdata(ofdev, ndev);915 916 fep = netdev_priv(ndev);917 fep->dev = &ofdev->dev;918 fep->ndev = ndev;919 fep->fpi = fpi;920 fep->ops = ops;921 922 fep->phylink_config.dev = &ndev->dev;923 fep->phylink_config.type = PHYLINK_NETDEV;924 fep->phylink_config.mac_capabilities = MAC_10 | MAC_100;925 926 __set_bit(PHY_INTERFACE_MODE_MII,927 fep->phylink_config.supported_interfaces);928 929 if (of_device_is_compatible(ofdev->dev.of_node, "fsl,mpc5125-fec"))930 __set_bit(PHY_INTERFACE_MODE_RMII,931 fep->phylink_config.supported_interfaces);932 933 phylink = phylink_create(&fep->phylink_config, dev_fwnode(fep->dev),934 phy_mode, &fs_enet_phylink_mac_ops);935 if (IS_ERR(phylink)) {936 ret = PTR_ERR(phylink);937 goto out_free_dev;938 }939 940 fep->phylink = phylink;941 942 ret = fep->ops->setup_data(ndev);943 if (ret)944 goto out_phylink;945 946 fep->rx_skbuff = (struct sk_buff **)&fep[1];947 fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;948 fep->mapped_as_page = (char *)(fep->rx_skbuff + fpi->rx_ring +949 fpi->tx_ring);950 951 spin_lock_init(&fep->lock);952 spin_lock_init(&fep->tx_lock);953 954 of_get_ethdev_address(ofdev->dev.of_node, ndev);955 956 ret = fep->ops->allocate_bd(ndev);957 if (ret)958 goto out_cleanup_data;959 960 fep->rx_bd_base = fep->ring_base;961 fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;962 963 fep->tx_ring = fpi->tx_ring;964 fep->rx_ring = fpi->rx_ring;965 966 ndev->netdev_ops = &fs_enet_netdev_ops;967 ndev->watchdog_timeo = 2 * HZ;968 INIT_WORK(&fep->timeout_work, fs_timeout_work);969 netif_napi_add_weight(ndev, &fep->napi, fs_enet_napi,970 fpi->napi_weight);971 972 ndev->ethtool_ops = &fs_ethtool_ops;973 974 ndev->features |= NETIF_F_SG;975 976 ret = register_netdev(ndev);977 if (ret)978 goto out_free_bd;979 980 pr_info("%s: fs_enet: %pM\n", ndev->name, ndev->dev_addr);981 982 return 0;983 984out_free_bd:985 fep->ops->free_bd(ndev);986out_cleanup_data:987 fep->ops->cleanup_data(ndev);988out_phylink:989 phylink_destroy(fep->phylink);990out_free_dev:991 free_netdev(ndev);992out_free_fpi:993 kfree(fpi);994 return ret;995}996 997static void fs_enet_remove(struct platform_device *ofdev)998{999 struct net_device *ndev = platform_get_drvdata(ofdev);1000 struct fs_enet_private *fep = netdev_priv(ndev);1001 1002 unregister_netdev(ndev);1003 1004 fep->ops->free_bd(ndev);1005 fep->ops->cleanup_data(ndev);1006 dev_set_drvdata(fep->dev, NULL);1007 phylink_destroy(fep->phylink);1008 free_netdev(ndev);1009}1010 1011static const struct of_device_id fs_enet_match[] = {1012#ifdef CONFIG_FS_ENET_HAS_SCC1013 {1014 .compatible = "fsl,cpm1-scc-enet",1015 .data = (void *)&fs_scc_ops,1016 },1017 {1018 .compatible = "fsl,cpm2-scc-enet",1019 .data = (void *)&fs_scc_ops,1020 },1021#endif1022#ifdef CONFIG_FS_ENET_HAS_FCC1023 {1024 .compatible = "fsl,cpm2-fcc-enet",1025 .data = (void *)&fs_fcc_ops,1026 },1027#endif1028#ifdef CONFIG_FS_ENET_HAS_FEC1029#ifdef CONFIG_FS_ENET_MPC5121_FEC1030 {1031 .compatible = "fsl,mpc5121-fec",1032 .data = (void *)&fs_fec_ops,1033 },1034 {1035 .compatible = "fsl,mpc5125-fec",1036 .data = (void *)&fs_fec_ops,1037 },1038#else1039 {1040 .compatible = "fsl,pq1-fec-enet",1041 .data = (void *)&fs_fec_ops,1042 },1043#endif1044#endif1045 {}1046};1047MODULE_DEVICE_TABLE(of, fs_enet_match);1048 1049static struct platform_driver fs_enet_driver = {1050 .driver = {1051 .name = "fs_enet",1052 .of_match_table = fs_enet_match,1053 },1054 .probe = fs_enet_probe,1055 .remove_new = fs_enet_remove,1056};1057 1058#ifdef CONFIG_NET_POLL_CONTROLLER1059static void fs_enet_netpoll(struct net_device *dev)1060{1061 disable_irq(dev->irq);1062 fs_enet_interrupt(dev->irq, dev);1063 enable_irq(dev->irq);1064}1065#endif1066 1067module_platform_driver(fs_enet_driver);1068