drivers/net/ethernet/freescale/gianfar.c

   1 /*
   2  * drivers/net/gianfar.c
   3  *
   4  * Gianfar Ethernet Driver
   5  * This driver is designed for the non-CPM ethernet controllers
   6  * on the 85xx and 83xx family of integrated processors
   7  * Based on 8260_io/fcc_enet.c
   8  *
   9  * Author: Andy Fleming
  10  * Maintainer: Kumar Gala
  11  * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
  12  *
  13  * Copyright 2002-2009, 2011 Freescale Semiconductor, Inc.
  14  * Copyright 2007 MontaVista Software, Inc.
  15  *
  16  * This program is free software; you can redistribute  it and/or modify it
  17  * under  the terms of  the GNU General  Public License as published by the
  18  * Free Software Foundation;  either version 2 of the  License, or (at your
  19  * option) any later version.
  20  *
  21  *  Gianfar:  AKA Lambda Draconis, "Dragon"
  22  *  RA 11 31 24.2
  23  *  Dec +69 19 52
  24  *  V 3.84
  25  *  B-V +1.62
  26  *
  27  *  Theory of operation
  28  *
  29  *  The driver is initialized through of_device. Configuration information
  30  *  is therefore conveyed through an OF-style device tree.
  31  *
  32  *  The Gianfar Ethernet Controller uses a ring of buffer
  33  *  descriptors.  The beginning is indicated by a register
  34  *  pointing to the physical address of the start of the ring.
  35  *  The end is determined by a "wrap" bit being set in the
  36  *  last descriptor of the ring.
  37  *
  38  *  When a packet is received, the RXF bit in the
  39  *  IEVENT register is set, triggering an interrupt when the
  40  *  corresponding bit in the IMASK register is also set (if
  41  *  interrupt coalescing is active, then the interrupt may not
  42  *  happen immediately, but will wait until either a set number
  43  *  of frames or amount of time have passed).  In NAPI, the
  44  *  interrupt handler will signal there is work to be done, and
  45  *  exit. This method will start at the last known empty
  46  *  descriptor, and process every subsequent descriptor until there
  47  *  are none left with data (NAPI will stop after a set number of
  48  *  packets to give time to other tasks, but will eventually
  49  *  process all the packets).  The data arrives inside a
  50  *  pre-allocated skb, and so after the skb is passed up to the
  51  *  stack, a new skb must be allocated, and the address field in
  52  *  the buffer descriptor must be updated to indicate this new
  53  *  skb.
  54  *
  55  *  When the kernel requests that a packet be transmitted, the
  56  *  driver starts where it left off last time, and points the
  57  *  descriptor at the buffer which was passed in.  The driver
  58  *  then informs the DMA engine that there are packets ready to
  59  *  be transmitted.  Once the controller is finished transmitting
  60  *  the packet, an interrupt may be triggered (under the same
  61  *  conditions as for reception, but depending on the TXF bit).
  62  *  The driver then cleans up the buffer.
  63  */
  64
  65 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  66 #define DEBUG
  67
  68 #include <linux/kernel.h>
  69 #include <linux/string.h>
  70 #include <linux/errno.h>
  71 #include <linux/unistd.h>
  72 #include <linux/slab.h>
  73 #include <linux/interrupt.h>
  74 #include <linux/init.h>
  75 #include <linux/delay.h>
  76 #include <linux/netdevice.h>
  77 #include <linux/etherdevice.h>
  78 #include <linux/skbuff.h>
  79 #include <linux/if_vlan.h>
  80 #include <linux/spinlock.h>
  81 #include <linux/mm.h>
  82 #include <linux/of_mdio.h>
  83 #include <linux/of_platform.h>
  84 #include <linux/ip.h>
  85 #include <linux/tcp.h>
  86 #include <linux/udp.h>
  87 #include <linux/in.h>
  88 #include <linux/net_tstamp.h>
  89
  90 #include <asm/io.h>
  91 #include <asm/reg.h>
  92 #include <asm/irq.h>
  93 #include <asm/uaccess.h>
  94 #include <linux/module.h>
  95 #include <linux/dma-mapping.h>
  96 #include <linux/crc32.h>
  97 #include <linux/mii.h>
  98 #include <linux/phy.h>
  99 #include <linux/phy_fixed.h>
 100 #include <linux/of.h>
 101 #include <linux/of_net.h>
 102
 103 #include "gianfar.h"
 104 #include "fsl_pq_mdio.h"
 105
 106 #define TX_TIMEOUT      (1*HZ)
 107 #undef BRIEF_GFAR_ERRORS
 108 #undef VERBOSE_GFAR_ERRORS
 109
 110 const char gfar_driver_name[] = "Gianfar Ethernet";
 111 const char gfar_driver_version[] = "1.3";
 112
 113 static int gfar_enet_open(struct net_device *dev);
 114 static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
 115 static void gfar_reset_task(struct work_struct *work);
 116 static void gfar_timeout(struct net_device *dev);
 117 static int gfar_close(struct net_device *dev);
 118 struct sk_buff *gfar_new_skb(struct net_device *dev);
 119 static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
 120                 struct sk_buff *skb);
 121 static int gfar_set_mac_address(struct net_device *dev);
 122 static int gfar_change_mtu(struct net_device *dev, int new_mtu);
 123 static irqreturn_t gfar_error(int irq, void *dev_id);
 124 static irqreturn_t gfar_transmit(int irq, void *dev_id);
 125 static irqreturn_t gfar_interrupt(int irq, void *dev_id);
 126 static void adjust_link(struct net_device *dev);
 127 static void init_registers(struct net_device *dev);
 128 static int init_phy(struct net_device *dev);
 129 static int gfar_probe(struct platform_device *ofdev);
 130 static int gfar_remove(struct platform_device *ofdev);
 131 static void free_skb_resources(struct gfar_private *priv);
 132 static void gfar_set_multi(struct net_device *dev);
 133 static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
 134 static void gfar_configure_serdes(struct net_device *dev);
 135 static int gfar_poll(struct napi_struct *napi, int budget);
 136 #ifdef CONFIG_NET_POLL_CONTROLLER
 137 static void gfar_netpoll(struct net_device *dev);
 138 #endif
 139 int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit);
 140 static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue);
 141 static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
 142                               int amount_pull);
 143 void gfar_halt(struct net_device *dev);
 144 static void gfar_halt_nodisable(struct net_device *dev);
 145 void gfar_start(struct net_device *dev);
 146 static void gfar_clear_exact_match(struct net_device *dev);
 147 static void gfar_set_mac_for_addr(struct net_device *dev, int num,
 148                                   const u8 *addr);
 149 static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 150
 151 MODULE_AUTHOR("Freescale Semiconductor, Inc");
 152 MODULE_DESCRIPTION("Gianfar Ethernet Driver");
 153 MODULE_LICENSE("GPL");
 154
 155 static void gfar_init_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
 156                             dma_addr_t buf)
 157 {
 158         u32 lstatus;
 159
 160         bdp->bufPtr = buf;
 161
 162         lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT);
 163         if (bdp == rx_queue->rx_bd_base + rx_queue->rx_ring_size - 1)
 164                 lstatus |= BD_LFLAG(RXBD_WRAP);
 165
 166         eieio();
 167
 168         bdp->lstatus = lstatus;
 169 }
 170
 171 static int gfar_init_bds(struct net_device *ndev)
 172 {
 173         struct gfar_private *priv = netdev_priv(ndev);
 174         struct gfar_priv_tx_q *tx_queue = NULL;
 175         struct gfar_priv_rx_q *rx_queue = NULL;
 176         struct txbd8 *txbdp;
 177         struct rxbd8 *rxbdp;
 178         int i, j;
 179
 180         for (i = 0; i < priv->num_tx_queues; i++) {
 181                 tx_queue = priv->tx_queue[i];
 182                 /* Initialize some variables in our dev structure */
 183                 tx_queue->num_txbdfree = tx_queue->tx_ring_size;
 184                 tx_queue->dirty_tx = tx_queue->tx_bd_base;
 185                 tx_queue->cur_tx = tx_queue->tx_bd_base;
 186                 tx_queue->skb_curtx = 0;
 187                 tx_queue->skb_dirtytx = 0;
 188
 189                 /* Initialize Transmit Descriptor Ring */
 190                 txbdp = tx_queue->tx_bd_base;
 191                 for (j = 0; j < tx_queue->tx_ring_size; j++) {
 192                         txbdp->lstatus = 0;
 193                         txbdp->bufPtr = 0;
 194                         txbdp++;
 195                 }
 196
 197                 /* Set the last descriptor in the ring to indicate wrap */
 198                 txbdp--;
 199                 txbdp->status |= TXBD_WRAP;
 200         }
 201
 202         for (i = 0; i < priv->num_rx_queues; i++) {
 203                 rx_queue = priv->rx_queue[i];
 204                 rx_queue->cur_rx = rx_queue->rx_bd_base;
 205                 rx_queue->skb_currx = 0;
 206                 rxbdp = rx_queue->rx_bd_base;
 207
 208                 for (j = 0; j < rx_queue->rx_ring_size; j++) {
 209                         struct sk_buff *skb = rx_queue->rx_skbuff[j];
 210
 211                         if (skb) {
 212                                 gfar_init_rxbdp(rx_queue, rxbdp,
 213                                                 rxbdp->bufPtr);
 214                         } else {
 215                                 skb = gfar_new_skb(ndev);
 216                                 if (!skb) {
 217                                         netdev_err(ndev, "Can't allocate RX buffers\n");
 218                                         goto err_rxalloc_fail;
 219                                 }
 220                                 rx_queue->rx_skbuff[j] = skb;
 221
 222                                 gfar_new_rxbdp(rx_queue, rxbdp, skb);
 223                         }
 224
 225                         rxbdp++;
 226                 }
 227
 228         }
 229
 230         return 0;
 231
 232 err_rxalloc_fail:
 233         free_skb_resources(priv);
 234         return -ENOMEM;
 235 }
 236
 237 static int gfar_alloc_skb_resources(struct net_device *ndev)
 238 {
 239         void *vaddr;
 240         dma_addr_t addr;
 241         int i, j, k;
 242         struct gfar_private *priv = netdev_priv(ndev);
 243         struct device *dev = &priv->ofdev->dev;
 244         struct gfar_priv_tx_q *tx_queue = NULL;
 245         struct gfar_priv_rx_q *rx_queue = NULL;
 246
 247         priv->total_tx_ring_size = 0;
 248         for (i = 0; i < priv->num_tx_queues; i++)
 249                 priv->total_tx_ring_size += priv->tx_queue[i]->tx_ring_size;
 250
 251         priv->total_rx_ring_size = 0;
 252         for (i = 0; i < priv->num_rx_queues; i++)
 253                 priv->total_rx_ring_size += priv->rx_queue[i]->rx_ring_size;
 254
 255         /* Allocate memory for the buffer descriptors */
 256         vaddr = dma_alloc_coherent(dev,
 257                         sizeof(struct txbd8) * priv->total_tx_ring_size +
 258                         sizeof(struct rxbd8) * priv->total_rx_ring_size,
 259                         &addr, GFP_KERNEL);
 260         if (!vaddr) {
 261                 netif_err(priv, ifup, ndev,
 262                           "Could not allocate buffer descriptors!\n");
 263                 return -ENOMEM;
 264         }
 265
 266         for (i = 0; i < priv->num_tx_queues; i++) {
 267                 tx_queue = priv->tx_queue[i];
 268                 tx_queue->tx_bd_base = vaddr;
 269                 tx_queue->tx_bd_dma_base = addr;
 270                 tx_queue->dev = ndev;
 271                 /* enet DMA only understands physical addresses */
 272                 addr    += sizeof(struct txbd8) *tx_queue->tx_ring_size;
 273                 vaddr   += sizeof(struct txbd8) *tx_queue->tx_ring_size;
 274         }
 275
 276         /* Start the rx descriptor ring where the tx ring leaves off */
 277         for (i = 0; i < priv->num_rx_queues; i++) {
 278                 rx_queue = priv->rx_queue[i];
 279                 rx_queue->rx_bd_base = vaddr;
 280                 rx_queue->rx_bd_dma_base = addr;
 281                 rx_queue->dev = ndev;
 282                 addr    += sizeof (struct rxbd8) * rx_queue->rx_ring_size;
 283                 vaddr   += sizeof (struct rxbd8) * rx_queue->rx_ring_size;
 284         }
 285
 286         /* Setup the skbuff rings */
 287         for (i = 0; i < priv->num_tx_queues; i++) {
 288                 tx_queue = priv->tx_queue[i];
 289                 tx_queue->tx_skbuff = kmalloc(sizeof(*tx_queue->tx_skbuff) *
 290                                   tx_queue->tx_ring_size, GFP_KERNEL);
 291                 if (!tx_queue->tx_skbuff) {
 292                         netif_err(priv, ifup, ndev,
 293                                   "Could not allocate tx_skbuff\n");
 294                         goto cleanup;
 295                 }
 296
 297                 for (k = 0; k < tx_queue->tx_ring_size; k++)
 298                         tx_queue->tx_skbuff[k] = NULL;
 299         }
 300
 301         for (i = 0; i < priv->num_rx_queues; i++) {
 302                 rx_queue = priv->rx_queue[i];
 303                 rx_queue->rx_skbuff = kmalloc(sizeof(*rx_queue->rx_skbuff) *
 304                                   rx_queue->rx_ring_size, GFP_KERNEL);
 305
 306                 if (!rx_queue->rx_skbuff) {
 307                         netif_err(priv, ifup, ndev,
 308                                   "Could not allocate rx_skbuff\n");
 309                         goto cleanup;
 310                 }
 311
 312                 for (j = 0; j < rx_queue->rx_ring_size; j++)
 313                         rx_queue->rx_skbuff[j] = NULL;
 314         }
 315
 316         if (gfar_init_bds(ndev))
 317                 goto cleanup;
 318
 319         return 0;
 320
 321 cleanup:
 322         free_skb_resources(priv);
 323         return -ENOMEM;
 324 }
 325
 326 static void gfar_init_tx_rx_base(struct gfar_private *priv)
 327 {
 328         struct gfar __iomem *regs = priv->gfargrp[0].regs;
 329         u32 __iomem *baddr;
 330         int i;
 331
 332         baddr = &regs->tbase0;
 333         for(i = 0; i < priv->num_tx_queues; i++) {
 334                 gfar_write(baddr, priv->tx_queue[i]->tx_bd_dma_base);
 335                 baddr   += 2;
 336         }
 337
 338         baddr = &regs->rbase0;
 339         for(i = 0; i < priv->num_rx_queues; i++) {
 340                 gfar_write(baddr, priv->rx_queue[i]->rx_bd_dma_base);
 341                 baddr   += 2;
 342         }
 343 }
 344
 345 static void gfar_init_mac(struct net_device *ndev)
 346 {
 347         struct gfar_private *priv = netdev_priv(ndev);
 348         struct gfar __iomem *regs = priv->gfargrp[0].regs;
 349         u32 rctrl = 0;
 350         u32 tctrl = 0;
 351         u32 attrs = 0;
 352
 353         /* write the tx/rx base registers */
 354         gfar_init_tx_rx_base(priv);
 355
 356         /* Configure the coalescing support */
 357         gfar_configure_coalescing(priv, 0xFF, 0xFF);
 358
 359         if (priv->rx_filer_enable) {
 360                 rctrl |= RCTRL_FILREN;
 361                 /* Program the RIR0 reg with the required distribution */
 362                 gfar_write(&regs->rir0, DEFAULT_RIR0);
 363         }
 364
 365         if (ndev->features & NETIF_F_RXCSUM)
 366                 rctrl |= RCTRL_CHECKSUMMING;
 367
 368         if (priv->extended_hash) {
 369                 rctrl |= RCTRL_EXTHASH;
 370
 371                 gfar_clear_exact_match(ndev);
 372                 rctrl |= RCTRL_EMEN;
 373         }
 374
 375         if (priv->padding) {
 376                 rctrl &= ~RCTRL_PAL_MASK;
 377                 rctrl |= RCTRL_PADDING(priv->padding);
 378         }
 379
 380         /* Insert receive time stamps into padding alignment bytes */
 381         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) {
 382                 rctrl &= ~RCTRL_PAL_MASK;
 383                 rctrl |= RCTRL_PADDING(8);
 384                 priv->padding = 8;
 385         }
 386
 387         /* Enable HW time stamping if requested from user space */
 388         if (priv->hwts_rx_en)
 389                 rctrl |= RCTRL_PRSDEP_INIT | RCTRL_TS_ENABLE;
 390
 391         if (ndev->features & NETIF_F_HW_VLAN_RX)
 392                 rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT;
 393
 394         /* Init rctrl based on our settings */
 395         gfar_write(&regs->rctrl, rctrl);
 396
 397         if (ndev->features & NETIF_F_IP_CSUM)
 398                 tctrl |= TCTRL_INIT_CSUM;
 399
 400         tctrl |= TCTRL_TXSCHED_PRIO;
 401
 402         gfar_write(&regs->tctrl, tctrl);
 403
 404         /* Set the extraction length and index */
 405         attrs = ATTRELI_EL(priv->rx_stash_size) |
 406                 ATTRELI_EI(priv->rx_stash_index);
 407
 408         gfar_write(&regs->attreli, attrs);
 409
 410         /* Start with defaults, and add stashing or locking
 411          * depending on the approprate variables */
 412         attrs = ATTR_INIT_SETTINGS;
 413
 414         if (priv->bd_stash_en)
 415                 attrs |= ATTR_BDSTASH;
 416
 417         if (priv->rx_stash_size != 0)
 418                 attrs |= ATTR_BUFSTASH;
 419
 420         gfar_write(&regs->attr, attrs);
 421
 422         gfar_write(&regs->fifo_tx_thr, priv->fifo_threshold);
 423         gfar_write(&regs->fifo_tx_starve, priv->fifo_starve);
 424         gfar_write(&regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
 425 }
 426
 427 static struct net_device_stats *gfar_get_stats(struct net_device *dev)
 428 {
 429         struct gfar_private *priv = netdev_priv(dev);
 430         unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0;
 431         unsigned long tx_packets = 0, tx_bytes = 0;
 432         int i = 0;
 433
 434         for (i = 0; i < priv->num_rx_queues; i++) {
 435                 rx_packets += priv->rx_queue[i]->stats.rx_packets;
 436                 rx_bytes += priv->rx_queue[i]->stats.rx_bytes;
 437                 rx_dropped += priv->rx_queue[i]->stats.rx_dropped;
 438         }
 439
 440         dev->stats.rx_packets = rx_packets;
 441         dev->stats.rx_bytes = rx_bytes;
 442         dev->stats.rx_dropped = rx_dropped;
 443
 444         for (i = 0; i < priv->num_tx_queues; i++) {
 445                 tx_bytes += priv->tx_queue[i]->stats.tx_bytes;
 446                 tx_packets += priv->tx_queue[i]->stats.tx_packets;
 447         }
 448
 449         dev->stats.tx_bytes = tx_bytes;
 450         dev->stats.tx_packets = tx_packets;
 451
 452         return &dev->stats;
 453 }
 454
 455 static const struct net_device_ops gfar_netdev_ops = {
 456         .ndo_open = gfar_enet_open,
 457         .ndo_start_xmit = gfar_start_xmit,
 458         .ndo_stop = gfar_close,
 459         .ndo_change_mtu = gfar_change_mtu,
 460         .ndo_set_features = gfar_set_features,
 461         .ndo_set_rx_mode = gfar_set_multi,
 462         .ndo_tx_timeout = gfar_timeout,
 463         .ndo_do_ioctl = gfar_ioctl,
 464         .ndo_get_stats = gfar_get_stats,
 465         .ndo_set_mac_address = eth_mac_addr,
 466         .ndo_validate_addr = eth_validate_addr,
 467 #ifdef CONFIG_NET_POLL_CONTROLLER
 468         .ndo_poll_controller = gfar_netpoll,
 469 #endif
 470 };
 471
 472 void lock_rx_qs(struct gfar_private *priv)
 473 {
 474         int i = 0x0;
 475
 476         for (i = 0; i < priv->num_rx_queues; i++)
 477                 spin_lock(&priv->rx_queue[i]->rxlock);
 478 }
 479
 480 void lock_tx_qs(struct gfar_private *priv)
 481 {
 482         int i = 0x0;
 483
 484         for (i = 0; i < priv->num_tx_queues; i++)
 485                 spin_lock(&priv->tx_queue[i]->txlock);
 486 }
 487
 488 void unlock_rx_qs(struct gfar_private *priv)
 489 {
 490         int i = 0x0;
 491
 492         for (i = 0; i < priv->num_rx_queues; i++)
 493                 spin_unlock(&priv->rx_queue[i]->rxlock);
 494 }
 495
 496 void unlock_tx_qs(struct gfar_private *priv)
 497 {
 498         int i = 0x0;
 499
 500         for (i = 0; i < priv->num_tx_queues; i++)
 501                 spin_unlock(&priv->tx_queue[i]->txlock);
 502 }
 503
 504 static bool gfar_is_vlan_on(struct gfar_private *priv)
 505 {
 506         return (priv->ndev->features & NETIF_F_HW_VLAN_RX) ||
 507                (priv->ndev->features & NETIF_F_HW_VLAN_TX);
 508 }
 509
 510 /* Returns 1 if incoming frames use an FCB */
 511 static inline int gfar_uses_fcb(struct gfar_private *priv)
 512 {
 513         return gfar_is_vlan_on(priv) ||
 514                 (priv->ndev->features & NETIF_F_RXCSUM) ||
 515                 (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER);
 516 }
 517
 518 static void free_tx_pointers(struct gfar_private *priv)
 519 {
 520         int i = 0;
 521
 522         for (i = 0; i < priv->num_tx_queues; i++)
 523                 kfree(priv->tx_queue[i]);
 524 }
 525
 526 static void free_rx_pointers(struct gfar_private *priv)
 527 {
 528         int i = 0;
 529
 530         for (i = 0; i < priv->num_rx_queues; i++)
 531                 kfree(priv->rx_queue[i]);
 532 }
 533
 534 static void unmap_group_regs(struct gfar_private *priv)
 535 {
 536         int i = 0;
 537
 538         for (i = 0; i < MAXGROUPS; i++)
 539                 if (priv->gfargrp[i].regs)
 540                         iounmap(priv->gfargrp[i].regs);
 541 }
 542
 543 static void disable_napi(struct gfar_private *priv)
 544 {
 545         int i = 0;
 546
 547         for (i = 0; i < priv->num_grps; i++)
 548                 napi_disable(&priv->gfargrp[i].napi);
 549 }
 550
 551 static void enable_napi(struct gfar_private *priv)
 552 {
 553         int i = 0;
 554
 555         for (i = 0; i < priv->num_grps; i++)
 556                 napi_enable(&priv->gfargrp[i].napi);
 557 }
 558
 559 static int gfar_parse_group(struct device_node *np,
 560                 struct gfar_private *priv, const char *model)
 561 {
 562         u32 *queue_mask;
 563
 564         priv->gfargrp[priv->num_grps].regs = of_iomap(np, 0);
 565         if (!priv->gfargrp[priv->num_grps].regs)
 566                 return -ENOMEM;
 567
 568         priv->gfargrp[priv->num_grps].interruptTransmit =
 569                         irq_of_parse_and_map(np, 0);
 570
 571         /* If we aren't the FEC we have multiple interrupts */
 572         if (model && strcasecmp(model, "FEC")) {
 573                 priv->gfargrp[priv->num_grps].interruptReceive =
 574                         irq_of_parse_and_map(np, 1);
 575                 priv->gfargrp[priv->num_grps].interruptError =
 576                         irq_of_parse_and_map(np,2);
 577                 if (priv->gfargrp[priv->num_grps].interruptTransmit == NO_IRQ ||
 578                     priv->gfargrp[priv->num_grps].interruptReceive  == NO_IRQ ||
 579                     priv->gfargrp[priv->num_grps].interruptError    == NO_IRQ)
 580                         return -EINVAL;
 581         }
 582
 583         priv->gfargrp[priv->num_grps].grp_id = priv->num_grps;
 584         priv->gfargrp[priv->num_grps].priv = priv;
 585         spin_lock_init(&priv->gfargrp[priv->num_grps].grplock);
 586         if(priv->mode == MQ_MG_MODE) {
 587                 queue_mask = (u32 *)of_get_property(np,
 588                                         "fsl,rx-bit-map", NULL);
 589                 priv->gfargrp[priv->num_grps].rx_bit_map =
 590                         queue_mask ?  *queue_mask :(DEFAULT_MAPPING >> priv->num_grps);
 591                 queue_mask = (u32 *)of_get_property(np,
 592                                         "fsl,tx-bit-map", NULL);
 593                 priv->gfargrp[priv->num_grps].tx_bit_map =
 594                         queue_mask ? *queue_mask : (DEFAULT_MAPPING >> priv->num_grps);
 595         } else {
 596                 priv->gfargrp[priv->num_grps].rx_bit_map = 0xFF;
 597                 priv->gfargrp[priv->num_grps].tx_bit_map = 0xFF;
 598         }
 599         priv->num_grps++;
 600
 601         return 0;
 602 }
 603
 604 static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
 605 {
 606         const char *model;
 607         const char *ctype;
 608         const void *mac_addr;
 609         int err = 0, i;
 610         struct net_device *dev = NULL;
 611         struct gfar_private *priv = NULL;
 612         struct device_node *np = ofdev->dev.of_node;
 613         struct device_node *child = NULL;
 614         const u32 *stash;
 615         const u32 *stash_len;
 616         const u32 *stash_idx;
 617         unsigned int num_tx_qs, num_rx_qs;
 618         u32 *tx_queues, *rx_queues;
 619
 620         if (!np || !of_device_is_available(np))
 621                 return -ENODEV;
 622
 623         /* parse the num of tx and rx queues */
 624         tx_queues = (u32 *)of_get_property(np, "fsl,num_tx_queues", NULL);
 625         num_tx_qs = tx_queues ? *tx_queues : 1;
 626
 627         if (num_tx_qs > MAX_TX_QS) {
 628                 pr_err("num_tx_qs(=%d) greater than MAX_TX_QS(=%d)\n",
 629                        num_tx_qs, MAX_TX_QS);
 630                 pr_err("Cannot do alloc_etherdev, aborting\n");
 631                 return -EINVAL;
 632         }
 633
 634         rx_queues = (u32 *)of_get_property(np, "fsl,num_rx_queues", NULL);
 635         num_rx_qs = rx_queues ? *rx_queues : 1;
 636
 637         if (num_rx_qs > MAX_RX_QS) {
 638                 pr_err("num_rx_qs(=%d) greater than MAX_RX_QS(=%d)\n",
 639                        num_rx_qs, MAX_RX_QS);
 640                 pr_err("Cannot do alloc_etherdev, aborting\n");
 641                 return -EINVAL;
 642         }
 643
 644         *pdev = alloc_etherdev_mq(sizeof(*priv), num_tx_qs);
 645         dev = *pdev;
 646         if (NULL == dev)
 647                 return -ENOMEM;
 648
 649         priv = netdev_priv(dev);
 650         priv->node = ofdev->dev.of_node;
 651         priv->ndev = dev;
 652
 653         priv->num_tx_queues = num_tx_qs;
 654         netif_set_real_num_rx_queues(dev, num_rx_qs);
 655         priv->num_rx_queues = num_rx_qs;
 656         priv->num_grps = 0x0;
 657
 658         /* Init Rx queue filer rule set linked list*/
 659         INIT_LIST_HEAD(&priv->rx_list.list);
 660         priv->rx_list.count = 0;
 661         mutex_init(&priv->rx_queue_access);
 662
 663         model = of_get_property(np, "model", NULL);
 664
 665         for (i = 0; i < MAXGROUPS; i++)
 666                 priv->gfargrp[i].regs = NULL;
 667
 668         /* Parse and initialize group specific information */
 669         if (of_device_is_compatible(np, "fsl,etsec2")) {
 670                 priv->mode = MQ_MG_MODE;
 671                 for_each_child_of_node(np, child) {
 672                         err = gfar_parse_group(child, priv, model);
 673                         if (err)
 674                                 goto err_grp_init;
 675                 }
 676         } else {
 677                 priv->mode = SQ_SG_MODE;
 678                 err = gfar_parse_group(np, priv, model);
 679                 if(err)
 680                         goto err_grp_init;
 681         }
 682
 683         for (i = 0; i < priv->num_tx_queues; i++)
 684                priv->tx_queue[i] = NULL;
 685         for (i = 0; i < priv->num_rx_queues; i++)
 686                 priv->rx_queue[i] = NULL;
 687
 688         for (i = 0; i < priv->num_tx_queues; i++) {
 689                 priv->tx_queue[i] = kzalloc(sizeof(struct gfar_priv_tx_q),
 690                                             GFP_KERNEL);
 691                 if (!priv->tx_queue[i]) {
 692                         err = -ENOMEM;
 693                         goto tx_alloc_failed;
 694                 }
 695                 priv->tx_queue[i]->tx_skbuff = NULL;
 696                 priv->tx_queue[i]->qindex = i;
 697                 priv->tx_queue[i]->dev = dev;
 698                 spin_lock_init(&(priv->tx_queue[i]->txlock));
 699         }
 700
 701         for (i = 0; i < priv->num_rx_queues; i++) {
 702                 priv->rx_queue[i] = kzalloc(sizeof(struct gfar_priv_rx_q),
 703                                             GFP_KERNEL);
 704                 if (!priv->rx_queue[i]) {
 705                         err = -ENOMEM;
 706                         goto rx_alloc_failed;
 707                 }
 708                 priv->rx_queue[i]->rx_skbuff = NULL;
 709                 priv->rx_queue[i]->qindex = i;
 710                 priv->rx_queue[i]->dev = dev;
 711                 spin_lock_init(&(priv->rx_queue[i]->rxlock));
 712         }
 713
 714
 715         stash = of_get_property(np, "bd-stash", NULL);
 716
 717         if (stash) {
 718                 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING;
 719                 priv->bd_stash_en = 1;
 720         }
 721
 722         stash_len = of_get_property(np, "rx-stash-len", NULL);
 723
 724         if (stash_len)
 725                 priv->rx_stash_size = *stash_len;
 726
 727         stash_idx = of_get_property(np, "rx-stash-idx", NULL);
 728
 729         if (stash_idx)
 730                 priv->rx_stash_index = *stash_idx;
 731
 732         if (stash_len || stash_idx)
 733                 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING;
 734
 735         mac_addr = of_get_mac_address(np);
 736         if (mac_addr)
 737                 memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
 738
 739         if (model && !strcasecmp(model, "TSEC"))
 740                 priv->device_flags =
 741                         FSL_GIANFAR_DEV_HAS_GIGABIT |
 742                         FSL_GIANFAR_DEV_HAS_COALESCE |
 743                         FSL_GIANFAR_DEV_HAS_RMON |
 744                         FSL_GIANFAR_DEV_HAS_MULTI_INTR;
 745         if (model && !strcasecmp(model, "eTSEC"))
 746                 priv->device_flags =
 747                         FSL_GIANFAR_DEV_HAS_GIGABIT |
 748                         FSL_GIANFAR_DEV_HAS_COALESCE |
 749                         FSL_GIANFAR_DEV_HAS_RMON |
 750                         FSL_GIANFAR_DEV_HAS_MULTI_INTR |
 751                         FSL_GIANFAR_DEV_HAS_PADDING |
 752                         FSL_GIANFAR_DEV_HAS_CSUM |
 753                         FSL_GIANFAR_DEV_HAS_VLAN |
 754                         FSL_GIANFAR_DEV_HAS_MAGIC_PACKET |
 755                         FSL_GIANFAR_DEV_HAS_EXTENDED_HASH |
 756                         FSL_GIANFAR_DEV_HAS_TIMER;
 757
 758         ctype = of_get_property(np, "phy-connection-type", NULL);
 759
 760         /* We only care about rgmii-id.  The rest are autodetected */
 761         if (ctype && !strcmp(ctype, "rgmii-id"))
 762                 priv->interface = PHY_INTERFACE_MODE_RGMII_ID;
 763         else
 764                 priv->interface = PHY_INTERFACE_MODE_MII;
 765
 766         if (of_get_property(np, "fsl,magic-packet", NULL))
 767                 priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET;
 768
 769         priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
 770
 771         /* Find the TBI PHY.  If it's not there, we don't support SGMII */
 772         priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0);
 773
 774         return 0;
 775
 776 rx_alloc_failed:
 777         free_rx_pointers(priv);
 778 tx_alloc_failed:
 779         free_tx_pointers(priv);
 780 err_grp_init:
 781         unmap_group_regs(priv);
 782         free_netdev(dev);
 783         return err;
 784 }
 785
 786 static int gfar_hwtstamp_ioctl(struct net_device *netdev,
 787                         struct ifreq *ifr, int cmd)
 788 {
 789         struct hwtstamp_config config;
 790         struct gfar_private *priv = netdev_priv(netdev);
 791
 792         if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
 793                 return -EFAULT;
 794
 795         /* reserved for future extensions */
 796         if (config.flags)
 797                 return -EINVAL;
 798
 799         switch (config.tx_type) {
 800         case HWTSTAMP_TX_OFF:
 801                 priv->hwts_tx_en = 0;
 802                 break;
 803         case HWTSTAMP_TX_ON:
 804                 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
 805                         return -ERANGE;
 806                 priv->hwts_tx_en = 1;
 807                 break;
 808         default:
 809                 return -ERANGE;
 810         }
 811
 812         switch (config.rx_filter) {
 813         case HWTSTAMP_FILTER_NONE:
 814                 if (priv->hwts_rx_en) {
 815                         stop_gfar(netdev);
 816                         priv->hwts_rx_en = 0;
 817                         startup_gfar(netdev);
 818                 }
 819                 break;
 820         default:
 821                 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
 822                         return -ERANGE;
 823                 if (!priv->hwts_rx_en) {
 824                         stop_gfar(netdev);
 825                         priv->hwts_rx_en = 1;
 826                         startup_gfar(netdev);
 827                 }
 828                 config.rx_filter = HWTSTAMP_FILTER_ALL;
 829                 break;
 830         }
 831
 832         return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
 833                 -EFAULT : 0;
 834 }
 835
 836 /* Ioctl MII Interface */
 837 static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 838 {
 839         struct gfar_private *priv = netdev_priv(dev);
 840
 841         if (!netif_running(dev))
 842                 return -EINVAL;
 843
 844         if (cmd == SIOCSHWTSTAMP)
 845                 return gfar_hwtstamp_ioctl(dev, rq, cmd);
 846
 847         if (!priv->phydev)
 848                 return -ENODEV;
 849
 850         return phy_mii_ioctl(priv->phydev, rq, cmd);
 851 }
 852
 853 static unsigned int reverse_bitmap(unsigned int bit_map, unsigned int max_qs)
 854 {
 855         unsigned int new_bit_map = 0x0;
 856         int mask = 0x1 << (max_qs - 1), i;
 857         for (i = 0; i < max_qs; i++) {
 858                 if (bit_map & mask)
 859                         new_bit_map = new_bit_map + (1 << i);
 860                 mask = mask >> 0x1;
 861         }
 862         return new_bit_map;
 863 }
 864
 865 static u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar,
 866                                    u32 class)
 867 {
 868         u32 rqfpr = FPR_FILER_MASK;
 869         u32 rqfcr = 0x0;
 870
 871         rqfar--;
 872         rqfcr = RQFCR_CLE | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
 873         priv->ftp_rqfpr[rqfar] = rqfpr;
 874         priv->ftp_rqfcr[rqfar] = rqfcr;
 875         gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
 876
 877         rqfar--;
 878         rqfcr = RQFCR_CMP_NOMATCH;
 879         priv->ftp_rqfpr[rqfar] = rqfpr;
 880         priv->ftp_rqfcr[rqfar] = rqfcr;
 881         gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
 882
 883         rqfar--;
 884         rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND;
 885         rqfpr = class;
 886         priv->ftp_rqfcr[rqfar] = rqfcr;
 887         priv->ftp_rqfpr[rqfar] = rqfpr;
 888         gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
 889
 890         rqfar--;
 891         rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND;
 892         rqfpr = class;
 893         priv->ftp_rqfcr[rqfar] = rqfcr;
 894         priv->ftp_rqfpr[rqfar] = rqfpr;
 895         gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
 896
 897         return rqfar;
 898 }
 899
 900 static void gfar_init_filer_table(struct gfar_private *priv)
 901 {
 902         int i = 0x0;
 903         u32 rqfar = MAX_FILER_IDX;
 904         u32 rqfcr = 0x0;
 905         u32 rqfpr = FPR_FILER_MASK;
 906
 907         /* Default rule */
 908         rqfcr = RQFCR_CMP_MATCH;
 909         priv->ftp_rqfcr[rqfar] = rqfcr;
 910         priv->ftp_rqfpr[rqfar] = rqfpr;
 911         gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
 912
 913         rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6);
 914         rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_UDP);
 915         rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_TCP);
 916         rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4);
 917         rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP);
 918         rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP);
 919
 920         /* cur_filer_idx indicated the first non-masked rule */
 921         priv->cur_filer_idx = rqfar;
 922
 923         /* Rest are masked rules */
 924         rqfcr = RQFCR_CMP_NOMATCH;
 925         for (i = 0; i < rqfar; i++) {
 926                 priv->ftp_rqfcr[i] = rqfcr;
 927                 priv->ftp_rqfpr[i] = rqfpr;
 928                 gfar_write_filer(priv, i, rqfcr, rqfpr);
 929         }
 930 }
 931
 932 static void gfar_detect_errata(struct gfar_private *priv)
 933 {
 934         struct device *dev = &priv->ofdev->dev;
 935         unsigned int pvr = mfspr(SPRN_PVR);
 936         unsigned int svr = mfspr(SPRN_SVR);
 937         unsigned int mod = (svr >> 16) & 0xfff6; /* w/o E suffix */
 938         unsigned int rev = svr & 0xffff;
 939
 940         /* MPC8313 Rev 2.0 and higher; All MPC837x */
 941         if ((pvr == 0x80850010 && mod == 0x80b0 && rev >= 0x0020) ||
 942                         (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
 943                 priv->errata |= GFAR_ERRATA_74;
 944
 945         /* MPC8313 and MPC837x all rev */
 946         if ((pvr == 0x80850010 && mod == 0x80b0) ||
 947                         (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
 948                 priv->errata |= GFAR_ERRATA_76;
 949
 950         /* MPC8313 and MPC837x all rev */
 951         if ((pvr == 0x80850010 && mod == 0x80b0) ||
 952                         (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
 953                 priv->errata |= GFAR_ERRATA_A002;
 954
 955         /* MPC8313 Rev < 2.0, MPC8548 rev 2.0 */
 956         if ((pvr == 0x80850010 && mod == 0x80b0 && rev < 0x0020) ||
 957                         (pvr == 0x80210020 && mod == 0x8030 && rev == 0x0020))
 958                 priv->errata |= GFAR_ERRATA_12;
 959
 960         if (priv->errata)
 961                 dev_info(dev, "enabled errata workarounds, flags: 0x%x\n",
 962                          priv->errata);
 963 }
 964
 965 /* Set up the ethernet device structure, private data,
 966  * and anything else we need before we start */
 967 static int gfar_probe(struct platform_device *ofdev)
 968 {
 969         u32 tempval;
 970         struct net_device *dev = NULL;
 971         struct gfar_private *priv = NULL;
 972         struct gfar __iomem *regs = NULL;
 973         int err = 0, i, grp_idx = 0;
 974         int len_devname;
 975         u32 rstat = 0, tstat = 0, rqueue = 0, tqueue = 0;
 976         u32 isrg = 0;
 977         u32 __iomem *baddr;
 978
 979         err = gfar_of_init(ofdev, &dev);
 980
 981         if (err)
 982                 return err;
 983
 984         priv = netdev_priv(dev);
 985         priv->ndev = dev;
 986         priv->ofdev = ofdev;
 987         priv->node = ofdev->dev.of_node;
 988         SET_NETDEV_DEV(dev, &ofdev->dev);
 989
 990         spin_lock_init(&priv->bflock);
 991         INIT_WORK(&priv->reset_task, gfar_reset_task);
 992
 993         dev_set_drvdata(&ofdev->dev, priv);
 994         regs = priv->gfargrp[0].regs;
 995
 996         gfar_detect_errata(priv);
 997
 998         /* Stop the DMA engine now, in case it was running before */
 999         /* (The firmware could have used it, and left it running). */
1000         gfar_halt(dev);
1001
1002         /* Reset MAC layer */
1003         gfar_write(&regs->maccfg1, MACCFG1_SOFT_RESET);
1004
1005         /* We need to delay at least 3 TX clocks */
1006         udelay(2);
1007
1008         tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
1009         gfar_write(&regs->maccfg1, tempval);
1010
1011         /* Initialize MACCFG2. */
1012         tempval = MACCFG2_INIT_SETTINGS;
1013         if (gfar_has_errata(priv, GFAR_ERRATA_74))
1014                 tempval |= MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK;
1015         gfar_write(&regs->maccfg2, tempval);
1016
1017         /* Initialize ECNTRL */
1018         gfar_write(&regs->ecntrl, ECNTRL_INIT_SETTINGS);
1019
1020         /* Set the dev->base_addr to the gfar reg region */
1021         dev->base_addr = (unsigned long) regs;
1022
1023         SET_NETDEV_DEV(dev, &ofdev->dev);
1024
1025         /* Fill in the dev structure */
1026         dev->watchdog_timeo = TX_TIMEOUT;
1027         dev->mtu = 1500;
1028         dev->netdev_ops = &gfar_netdev_ops;
1029         dev->ethtool_ops = &gfar_ethtool_ops;
1030
1031         /* Register for napi ...We are registering NAPI for each grp */
1032         for (i = 0; i < priv->num_grps; i++)
1033                 netif_napi_add(dev, &priv->gfargrp[i].napi, gfar_poll, GFAR_DEV_WEIGHT);
1034
1035         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
1036                 dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG |
1037                         NETIF_F_RXCSUM;
1038                 dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG |
1039                         NETIF_F_RXCSUM | NETIF_F_HIGHDMA;
1040         }
1041
1042         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) {
1043                 dev->hw_features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1044                 dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1045         }
1046
1047         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
1048                 priv->extended_hash = 1;
1049                 priv->hash_width = 9;
1050
1051                 priv->hash_regs[0] = &regs->igaddr0;
1052                 priv->hash_regs[1] = &regs->igaddr1;
1053                 priv->hash_regs[2] = &regs->igaddr2;
1054                 priv->hash_regs[3] = &regs->igaddr3;
1055                 priv->hash_regs[4] = &regs->igaddr4;
1056                 priv->hash_regs[5] = &regs->igaddr5;
1057                 priv->hash_regs[6] = &regs->igaddr6;
1058                 priv->hash_regs[7] = &regs->igaddr7;
1059                 priv->hash_regs[8] = &regs->gaddr0;
1060                 priv->hash_regs[9] = &regs->gaddr1;
1061                 priv->hash_regs[10] = &regs->gaddr2;
1062                 priv->hash_regs[11] = &regs->gaddr3;
1063                 priv->hash_regs[12] = &regs->gaddr4;
1064                 priv->hash_regs[13] = &regs->gaddr5;
1065                 priv->hash_regs[14] = &regs->gaddr6;
1066                 priv->hash_regs[15] = &regs->gaddr7;
1067
1068         } else {
1069                 priv->extended_hash = 0;
1070                 priv->hash_width = 8;
1071
1072                 priv->hash_regs[0] = &regs->gaddr0;
1073                 priv->hash_regs[1] = &regs->gaddr1;
1074                 priv->hash_regs[2] = &regs->gaddr2;
1075                 priv->hash_regs[3] = &regs->gaddr3;
1076                 priv->hash_regs[4] = &regs->gaddr4;
1077                 priv->hash_regs[5] = &regs->gaddr5;
1078                 priv->hash_regs[6] = &regs->gaddr6;
1079                 priv->hash_regs[7] = &regs->gaddr7;
1080         }
1081
1082         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING)
1083                 priv->padding = DEFAULT_PADDING;
1084         else
1085                 priv->padding = 0;
1086
1087         if (dev->features & NETIF_F_IP_CSUM ||
1088                         priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)
1089                 dev->hard_header_len += GMAC_FCB_LEN;
1090
1091         /* Program the isrg regs only if number of grps > 1 */
1092         if (priv->num_grps > 1) {
1093                 baddr = &regs->isrg0;
1094                 for (i = 0; i < priv->num_grps; i++) {
1095                         isrg |= (priv->gfargrp[i].rx_bit_map << ISRG_SHIFT_RX);
1096                         isrg |= (priv->gfargrp[i].tx_bit_map << ISRG_SHIFT_TX);
1097                         gfar_write(baddr, isrg);
1098                         baddr++;
1099                         isrg = 0x0;
1100                 }
1101         }
1102
1103         /* Need to reverse the bit maps as  bit_map's MSB is q0
1104          * but, for_each_set_bit parses from right to left, which
1105          * basically reverses the queue numbers */
1106         for (i = 0; i< priv->num_grps; i++) {
1107                 priv->gfargrp[i].tx_bit_map = reverse_bitmap(
1108                                 priv->gfargrp[i].tx_bit_map, MAX_TX_QS);
1109                 priv->gfargrp[i].rx_bit_map = reverse_bitmap(
1110                                 priv->gfargrp[i].rx_bit_map, MAX_RX_QS);
1111         }
1112
1113         /* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values,
1114          * also assign queues to groups */
1115         for (grp_idx = 0; grp_idx < priv->num_grps; grp_idx++) {
1116                 priv->gfargrp[grp_idx].num_rx_queues = 0x0;
1117                 for_each_set_bit(i, &priv->gfargrp[grp_idx].rx_bit_map,
1118                                 priv->num_rx_queues) {
1119                         priv->gfargrp[grp_idx].num_rx_queues++;
1120                         priv->rx_queue[i]->grp = &priv->gfargrp[grp_idx];
1121                         rstat = rstat | (RSTAT_CLEAR_RHALT >> i);
1122                         rqueue = rqueue | ((RQUEUE_EN0 | RQUEUE_EX0) >> i);
1123                 }
1124                 priv->gfargrp[grp_idx].num_tx_queues = 0x0;
1125                 for_each_set_bit(i, &priv->gfargrp[grp_idx].tx_bit_map,
1126                                 priv->num_tx_queues) {
1127                         priv->gfargrp[grp_idx].num_tx_queues++;
1128                         priv->tx_queue[i]->grp = &priv->gfargrp[grp_idx];
1129                         tstat = tstat | (TSTAT_CLEAR_THALT >> i);
1130                         tqueue = tqueue | (TQUEUE_EN0 >> i);
1131                 }
1132                 priv->gfargrp[grp_idx].rstat = rstat;
1133                 priv->gfargrp[grp_idx].tstat = tstat;
1134                 rstat = tstat =0;
1135         }
1136
1137         gfar_write(&regs->rqueue, rqueue);
1138         gfar_write(&regs->tqueue, tqueue);
1139
1140         priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
1141
1142         /* Initializing some of the rx/tx queue level parameters */
1143         for (i = 0; i < priv->num_tx_queues; i++) {
1144                 priv->tx_queue[i]->tx_ring_size = DEFAULT_TX_RING_SIZE;
1145                 priv->tx_queue[i]->num_txbdfree = DEFAULT_TX_RING_SIZE;
1146                 priv->tx_queue[i]->txcoalescing = DEFAULT_TX_COALESCE;
1147                 priv->tx_queue[i]->txic = DEFAULT_TXIC;
1148         }
1149
1150         for (i = 0; i < priv->num_rx_queues; i++) {
1151                 priv->rx_queue[i]->rx_ring_size = DEFAULT_RX_RING_SIZE;
1152                 priv->rx_queue[i]->rxcoalescing = DEFAULT_RX_COALESCE;
1153                 priv->rx_queue[i]->rxic = DEFAULT_RXIC;
1154         }
1155
1156         /* always enable rx filer*/
1157         priv->rx_filer_enable = 1;
1158         /* Enable most messages by default */
1159         priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1160
1161         /* Carrier starts down, phylib will bring it up */
1162         netif_carrier_off(dev);
1163
1164         err = register_netdev(dev);
1165
1166         if (err) {
1167                 pr_err("%s: Cannot register net device, aborting\n", dev->name);
1168                 goto register_fail;
1169         }
1170
1171         device_init_wakeup(&dev->dev,
1172                 priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1173
1174         /* fill out IRQ number and name fields */
1175         len_devname = strlen(dev->name);
1176         for (i = 0; i < priv->num_grps; i++) {
1177                 strncpy(&priv->gfargrp[i].int_name_tx[0], dev->name,
1178                                 len_devname);
1179                 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1180                         strncpy(&priv->gfargrp[i].int_name_tx[len_devname],
1181                                 "_g", sizeof("_g"));
1182                         priv->gfargrp[i].int_name_tx[
1183                                 strlen(priv->gfargrp[i].int_name_tx)] = i+48;
1184                         strncpy(&priv->gfargrp[i].int_name_tx[strlen(
1185                                 priv->gfargrp[i].int_name_tx)],
1186                                 "_tx", sizeof("_tx") + 1);
1187
1188                         strncpy(&priv->gfargrp[i].int_name_rx[0], dev->name,
1189                                         len_devname);
1190                         strncpy(&priv->gfargrp[i].int_name_rx[len_devname],
1191                                         "_g", sizeof("_g"));
1192                         priv->gfargrp[i].int_name_rx[
1193                                 strlen(priv->gfargrp[i].int_name_rx)] = i+48;
1194                         strncpy(&priv->gfargrp[i].int_name_rx[strlen(
1195                                 priv->gfargrp[i].int_name_rx)],
1196                                 "_rx", sizeof("_rx") + 1);
1197
1198                         strncpy(&priv->gfargrp[i].int_name_er[0], dev->name,
1199                                         len_devname);
1200                         strncpy(&priv->gfargrp[i].int_name_er[len_devname],
1201                                 "_g", sizeof("_g"));
1202                         priv->gfargrp[i].int_name_er[strlen(
1203                                         priv->gfargrp[i].int_name_er)] = i+48;
1204                         strncpy(&priv->gfargrp[i].int_name_er[strlen(\
1205                                 priv->gfargrp[i].int_name_er)],
1206                                 "_er", sizeof("_er") + 1);
1207                 } else
1208                         priv->gfargrp[i].int_name_tx[len_devname] = '\0';
1209         }
1210
1211         /* Initialize the filer table */
1212         gfar_init_filer_table(priv);
1213
1214         /* Create all the sysfs files */
1215         gfar_init_sysfs(dev);
1216
1217         /* Print out the device info */
1218         netdev_info(dev, "mac: %pM\n", dev->dev_addr);
1219
1220         /* Even more device info helps when determining which kernel */
1221         /* provided which set of benchmarks. */
1222         netdev_info(dev, "Running with NAPI enabled\n");
1223         for (i = 0; i < priv->num_rx_queues; i++)
1224                 netdev_info(dev, "RX BD ring size for Q[%d]: %d\n",
1225                             i, priv->rx_queue[i]->rx_ring_size);
1226         for(i = 0; i < priv->num_tx_queues; i++)
1227                 netdev_info(dev, "TX BD ring size for Q[%d]: %d\n",
1228                             i, priv->tx_queue[i]->tx_ring_size);
1229
1230         return 0;
1231
1232 register_fail:
1233         unmap_group_regs(priv);
1234         free_tx_pointers(priv);
1235         free_rx_pointers(priv);
1236         if (priv->phy_node)
1237                 of_node_put(priv->phy_node);
1238         if (priv->tbi_node)
1239                 of_node_put(priv->tbi_node);
1240         free_netdev(dev);
1241         return err;
1242 }
1243
1244 static int gfar_remove(struct platform_device *ofdev)
1245 {
1246         struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
1247
1248         if (priv->phy_node)
1249                 of_node_put(priv->phy_node);
1250         if (priv->tbi_node)
1251                 of_node_put(priv->tbi_node);
1252
1253         dev_set_drvdata(&ofdev->dev, NULL);
1254
1255         unregister_netdev(priv->ndev);
1256         unmap_group_regs(priv);
1257         free_netdev(priv->ndev);
1258
1259         return 0;
1260 }
1261
1262 #ifdef CONFIG_PM
1263
1264 static int gfar_suspend(struct device *dev)
1265 {
1266         struct gfar_private *priv = dev_get_drvdata(dev);
1267         struct net_device *ndev = priv->ndev;
1268         struct gfar __iomem *regs = priv->gfargrp[0].regs;
1269         unsigned long flags;
1270         u32 tempval;
1271
1272         int magic_packet = priv->wol_en &&
1273                 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1274
1275         netif_device_detach(ndev);
1276
1277         if (netif_running(ndev)) {
1278
1279                 local_irq_save(flags);
1280                 lock_tx_qs(priv);
1281                 lock_rx_qs(priv);
1282
1283                 gfar_halt_nodisable(ndev);
1284
1285                 /* Disable Tx, and Rx if wake-on-LAN is disabled. */
1286                 tempval = gfar_read(&regs->maccfg1);
1287
1288                 tempval &= ~MACCFG1_TX_EN;
1289
1290                 if (!magic_packet)
1291                         tempval &= ~MACCFG1_RX_EN;
1292
1293                 gfar_write(&regs->maccfg1, tempval);
1294
1295                 unlock_rx_qs(priv);
1296                 unlock_tx_qs(priv);
1297                 local_irq_restore(flags);
1298
1299                 disable_napi(priv);
1300
1301                 if (magic_packet) {
1302                         /* Enable interrupt on Magic Packet */
1303                         gfar_write(&regs->imask, IMASK_MAG);
1304
1305                         /* Enable Magic Packet mode */
1306                         tempval = gfar_read(&regs->maccfg2);
1307                         tempval |= MACCFG2_MPEN;
1308                         gfar_write(&regs->maccfg2, tempval);
1309                 } else {
1310                         phy_stop(priv->phydev);
1311                 }
1312         }
1313
1314         return 0;
1315 }
1316
1317 static int gfar_resume(struct device *dev)
1318 {
1319         struct gfar_private *priv = dev_get_drvdata(dev);
1320         struct net_device *ndev = priv->ndev;
1321         struct gfar __iomem *regs = priv->gfargrp[0].regs;
1322         unsigned long flags;
1323         u32 tempval;
1324         int magic_packet = priv->wol_en &&
1325                 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1326
1327         if (!netif_running(ndev)) {
1328                 netif_device_attach(ndev);
1329                 return 0;
1330         }
1331
1332         if (!magic_packet && priv->phydev)
1333                 phy_start(priv->phydev);
1334
1335         /* Disable Magic Packet mode, in case something
1336          * else woke us up.
1337          */
1338         local_irq_save(flags);
1339         lock_tx_qs(priv);
1340         lock_rx_qs(priv);
1341
1342         tempval = gfar_read(&regs->maccfg2);
1343         tempval &= ~MACCFG2_MPEN;
1344         gfar_write(&regs->maccfg2, tempval);
1345
1346         gfar_start(ndev);
1347
1348         unlock_rx_qs(priv);
1349         unlock_tx_qs(priv);
1350         local_irq_restore(flags);
1351
1352         netif_device_attach(ndev);
1353
1354         enable_napi(priv);
1355
1356         return 0;
1357 }
1358
1359 static int gfar_restore(struct device *dev)
1360 {
1361         struct gfar_private *priv = dev_get_drvdata(dev);
1362         struct net_device *ndev = priv->ndev;
1363
1364         if (!netif_running(ndev))
1365                 return 0;
1366
1367         gfar_init_bds(ndev);
1368         init_registers(ndev);
1369         gfar_set_mac_address(ndev);
1370         gfar_init_mac(ndev);
1371         gfar_start(ndev);
1372
1373         priv->oldlink = 0;
1374         priv->oldspeed = 0;
1375         priv->oldduplex = -1;
1376
1377         if (priv->phydev)
1378                 phy_start(priv->phydev);
1379
1380         netif_device_attach(ndev);
1381         enable_napi(priv);
1382
1383         return 0;
1384 }
1385
1386 static struct dev_pm_ops gfar_pm_ops = {
1387         .suspend = gfar_suspend,
1388         .resume = gfar_resume,
1389         .freeze = gfar_suspend,
1390         .thaw = gfar_resume,
1391         .restore = gfar_restore,
1392 };
1393
1394 #define GFAR_PM_OPS (&gfar_pm_ops)
1395
1396 #else
1397
1398 #define GFAR_PM_OPS NULL
1399
1400 #endif
1401
1402 /* Reads the controller's registers to determine what interface
1403  * connects it to the PHY.
1404  */
1405 static phy_interface_t gfar_get_interface(struct net_device *dev)
1406 {
1407         struct gfar_private *priv = netdev_priv(dev);
1408         struct gfar __iomem *regs = priv->gfargrp[0].regs;
1409         u32 ecntrl;
1410
1411         ecntrl = gfar_read(&regs->ecntrl);
1412
1413         if (ecntrl & ECNTRL_SGMII_MODE)
1414                 return PHY_INTERFACE_MODE_SGMII;
1415
1416         if (ecntrl & ECNTRL_TBI_MODE) {
1417                 if (ecntrl & ECNTRL_REDUCED_MODE)
1418                         return PHY_INTERFACE_MODE_RTBI;
1419                 else
1420                         return PHY_INTERFACE_MODE_TBI;
1421         }
1422
1423         if (ecntrl & ECNTRL_REDUCED_MODE) {
1424                 if (ecntrl & ECNTRL_REDUCED_MII_MODE)
1425                         return PHY_INTERFACE_MODE_RMII;
1426                 else {
1427                         phy_interface_t interface = priv->interface;
1428
1429                         /*
1430                          * This isn't autodetected right now, so it must
1431                          * be set by the device tree or platform code.
1432                          */
1433                         if (interface == PHY_INTERFACE_MODE_RGMII_ID)
1434                                 return PHY_INTERFACE_MODE_RGMII_ID;
1435
1436                         return PHY_INTERFACE_MODE_RGMII;
1437                 }
1438         }
1439
1440         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
1441                 return PHY_INTERFACE_MODE_GMII;
1442
1443         return PHY_INTERFACE_MODE_MII;
1444 }
1445
1446
1447 /* Initializes driver's PHY state, and attaches to the PHY.
1448  * Returns 0 on success.
1449  */
1450 static int init_phy(struct net_device *dev)
1451 {
1452         struct gfar_private *priv = netdev_priv(dev);
1453         uint gigabit_support =
1454                 priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
1455                 SUPPORTED_1000baseT_Full : 0;
1456         phy_interface_t interface;
1457
1458         priv->oldlink = 0;
1459         priv->oldspeed = 0;
1460         priv->oldduplex = -1;
1461
1462         interface = gfar_get_interface(dev);
1463
1464         priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0,
1465                                       interface);
1466         if (!priv->phydev)
1467                 priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link,
1468                                                          interface);
1469         if (!priv->phydev) {
1470                 dev_err(&dev->dev, "could not attach to PHY\n");
1471                 return -ENODEV;
1472         }
1473
1474         if (interface == PHY_INTERFACE_MODE_SGMII)
1475                 gfar_configure_serdes(dev);
1476
1477         /* Remove any features not supported by the controller */
1478         priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
1479         priv->phydev->advertising = priv->phydev->supported;
1480
1481         return 0;
1482 }
1483
1484 /*
1485  * Initialize TBI PHY interface for communicating with the
1486  * SERDES lynx PHY on the chip.  We communicate with this PHY
1487  * through the MDIO bus on each controller, treating it as a
1488  * "normal" PHY at the address found in the TBIPA register.  We assume
1489  * that the TBIPA register is valid.  Either the MDIO bus code will set
1490  * it to a value that doesn't conflict with other PHYs on the bus, or the
1491  * value doesn't matter, as there are no other PHYs on the bus.
1492  */
1493 static void gfar_configure_serdes(struct net_device *dev)
1494 {
1495         struct gfar_private *priv = netdev_priv(dev);
1496         struct phy_device *tbiphy;
1497
1498         if (!priv->tbi_node) {
1499                 dev_warn(&dev->dev, "error: SGMII mode requires that the "
1500                                     "device tree specify a tbi-handle\n");
1501                 return;
1502         }
1503
1504         tbiphy = of_phy_find_device(priv->tbi_node);
1505         if (!tbiphy) {
1506                 dev_err(&dev->dev, "error: Could not get TBI device\n");
1507                 return;
1508         }
1509
1510         /*
1511          * If the link is already up, we must already be ok, and don't need to
1512          * configure and reset the TBI<->SerDes link.  Maybe U-Boot configured
1513          * everything for us?  Resetting it takes the link down and requires
1514          * several seconds for it to come back.
1515          */
1516         if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS)
1517                 return;
1518
1519         /* Single clk mode, mii mode off(for serdes communication) */
1520         phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT);
1521
1522         phy_write(tbiphy, MII_ADVERTISE,
1523                         ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1524                         ADVERTISE_1000XPSE_ASYM);
1525
1526         phy_write(tbiphy, MII_BMCR, BMCR_ANENABLE |
1527                         BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000);
1528 }
1529
1530 static void init_registers(struct net_device *dev)
1531 {
1532         struct gfar_private *priv = netdev_priv(dev);
1533         struct gfar __iomem *regs = NULL;
1534         int i = 0;
1535
1536         for (i = 0; i < priv->num_grps; i++) {
1537                 regs = priv->gfargrp[i].regs;
1538                 /* Clear IEVENT */
1539                 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
1540
1541                 /* Initialize IMASK */
1542                 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1543         }
1544
1545         regs = priv->gfargrp[0].regs;
1546         /* Init hash registers to zero */
1547         gfar_write(&regs->igaddr0, 0);
1548         gfar_write(&regs->igaddr1, 0);
1549         gfar_write(&regs->igaddr2, 0);
1550         gfar_write(&regs->igaddr3, 0);
1551         gfar_write(&regs->igaddr4, 0);
1552         gfar_write(&regs->igaddr5, 0);
1553         gfar_write(&regs->igaddr6, 0);
1554         gfar_write(&regs->igaddr7, 0);
1555
1556         gfar_write(&regs->gaddr0, 0);
1557         gfar_write(&regs->gaddr1, 0);
1558         gfar_write(&regs->gaddr2, 0);
1559         gfar_write(&regs->gaddr3, 0);
1560         gfar_write(&regs->gaddr4, 0);
1561         gfar_write(&regs->gaddr5, 0);
1562         gfar_write(&regs->gaddr6, 0);
1563         gfar_write(&regs->gaddr7, 0);
1564
1565         /* Zero out the rmon mib registers if it has them */
1566         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
1567                 memset_io(&(regs->rmon), 0, sizeof (struct rmon_mib));
1568
1569                 /* Mask off the CAM interrupts */
1570                 gfar_write(&regs->rmon.cam1, 0xffffffff);
1571                 gfar_write(&regs->rmon.cam2, 0xffffffff);
1572         }
1573
1574         /* Initialize the max receive buffer length */
1575         gfar_write(&regs->mrblr, priv->rx_buffer_size);
1576
1577         /* Initialize the Minimum Frame Length Register */
1578         gfar_write(&regs->minflr, MINFLR_INIT_SETTINGS);
1579 }
1580
1581 static int __gfar_is_rx_idle(struct gfar_private *priv)
1582 {
1583         u32 res;
1584
1585         /*
1586          * Normaly TSEC should not hang on GRS commands, so we should
1587          * actually wait for IEVENT_GRSC flag.
1588          */
1589         if (likely(!gfar_has_errata(priv, GFAR_ERRATA_A002)))
1590                 return 0;
1591
1592         /*
1593          * Read the eTSEC register at offset 0xD1C. If bits 7-14 are
1594          * the same as bits 23-30, the eTSEC Rx is assumed to be idle
1595          * and the Rx can be safely reset.
1596          */
1597         res = gfar_read((void __iomem *)priv->gfargrp[0].regs + 0xd1c);
1598         res &= 0x7f807f80;
1599         if ((res & 0xffff) == (res >> 16))
1600                 return 1;
1601
1602         return 0;
1603 }
1604
1605 /* Halt the receive and transmit queues */
1606 static void gfar_halt_nodisable(struct net_device *dev)
1607 {
1608         struct gfar_private *priv = netdev_priv(dev);
1609         struct gfar __iomem *regs = NULL;
1610         u32 tempval;
1611         int i = 0;
1612
1613         for (i = 0; i < priv->num_grps; i++) {
1614                 regs = priv->gfargrp[i].regs;
1615                 /* Mask all interrupts */
1616                 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1617
1618                 /* Clear all interrupts */
1619                 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
1620         }
1621
1622         regs = priv->gfargrp[0].regs;
1623         /* Stop the DMA, and wait for it to stop */
1624         tempval = gfar_read(&regs->dmactrl);
1625         if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
1626             != (DMACTRL_GRS | DMACTRL_GTS)) {
1627                 int ret;
1628
1629                 tempval |= (DMACTRL_GRS | DMACTRL_GTS);
1630                 gfar_write(&regs->dmactrl, tempval);
1631
1632                 do {
1633                         ret = spin_event_timeout(((gfar_read(&regs->ievent) &
1634                                  (IEVENT_GRSC | IEVENT_GTSC)) ==
1635                                  (IEVENT_GRSC | IEVENT_GTSC)), 1000000, 0);
1636                         if (!ret && !(gfar_read(&regs->ievent) & IEVENT_GRSC))
1637                                 ret = __gfar_is_rx_idle(priv);
1638                 } while (!ret);
1639         }
1640 }
1641
1642 /* Halt the receive and transmit queues */
1643 void gfar_halt(struct net_device *dev)
1644 {
1645         struct gfar_private *priv = netdev_priv(dev);
1646         struct gfar __iomem *regs = priv->gfargrp[0].regs;
1647         u32 tempval;
1648
1649         gfar_halt_nodisable(dev);
1650
1651         /* Disable Rx and Tx */
1652         tempval = gfar_read(&regs->maccfg1);
1653         tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
1654         gfar_write(&regs->maccfg1, tempval);
1655 }
1656
1657 static void free_grp_irqs(struct gfar_priv_grp *grp)
1658 {
1659         free_irq(grp->interruptError, grp);
1660         free_irq(grp->interruptTransmit, grp);
1661         free_irq(grp->interruptReceive, grp);
1662 }
1663
1664 void stop_gfar(struct net_device *dev)
1665 {
1666         struct gfar_private *priv = netdev_priv(dev);
1667         unsigned long flags;
1668         int i;
1669
1670         phy_stop(priv->phydev);
1671
1672
1673         /* Lock it down */
1674         local_irq_save(flags);
1675         lock_tx_qs(priv);
1676         lock_rx_qs(priv);
1677
1678         gfar_halt(dev);
1679
1680         unlock_rx_qs(priv);
1681         unlock_tx_qs(priv);
1682         local_irq_restore(flags);
1683
1684         /* Free the IRQs */
1685         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1686                 for (i = 0; i < priv->num_grps; i++)
1687                         free_grp_irqs(&priv->gfargrp[i]);
1688         } else {
1689                 for (i = 0; i < priv->num_grps; i++)
1690                         free_irq(priv->gfargrp[i].interruptTransmit,
1691                                         &priv->gfargrp[i]);
1692         }
1693
1694         free_skb_resources(priv);
1695 }
1696
1697 static void free_skb_tx_queue(struct gfar_priv_tx_q *tx_queue)
1698 {
1699         struct txbd8 *txbdp;
1700         struct gfar_private *priv = netdev_priv(tx_queue->dev);
1701         int i, j;
1702
1703         txbdp = tx_queue->tx_bd_base;
1704
1705         for (i = 0; i < tx_queue->tx_ring_size; i++) {
1706                 if (!tx_queue->tx_skbuff[i])
1707                         continue;
1708
1709                 dma_unmap_single(&priv->ofdev->dev, txbdp->bufPtr,
1710                                 txbdp->length, DMA_TO_DEVICE);
1711                 txbdp->lstatus = 0;
1712                 for (j = 0; j < skb_shinfo(tx_queue->tx_skbuff[i])->nr_frags;
1713                                 j++) {
1714                         txbdp++;
1715                         dma_unmap_page(&priv->ofdev->dev, txbdp->bufPtr,
1716                                         txbdp->length, DMA_TO_DEVICE);
1717                 }
1718                 txbdp++;
1719                 dev_kfree_skb_any(tx_queue->tx_skbuff[i]);
1720                 tx_queue->tx_skbuff[i] = NULL;
1721         }
1722         kfree(tx_queue->tx_skbuff);
1723 }
1724
1725 static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue)
1726 {
1727         struct rxbd8 *rxbdp;
1728         struct gfar_private *priv = netdev_priv(rx_queue->dev);
1729         int i;
1730
1731         rxbdp = rx_queue->rx_bd_base;
1732
1733         for (i = 0; i < rx_queue->rx_ring_size; i++) {
1734                 if (rx_queue->rx_skbuff[i]) {
1735                         dma_unmap_single(&priv->ofdev->dev,
1736                                         rxbdp->bufPtr, priv->rx_buffer_size,
1737                                         DMA_FROM_DEVICE);
1738                         dev_kfree_skb_any(rx_queue->rx_skbuff[i]);
1739                         rx_queue->rx_skbuff[i] = NULL;
1740                 }
1741                 rxbdp->lstatus = 0;
1742                 rxbdp->bufPtr = 0;
1743                 rxbdp++;
1744         }
1745         kfree(rx_queue->rx_skbuff);
1746 }
1747
1748 /* If there are any tx skbs or rx skbs still around, free them.
1749  * Then free tx_skbuff and rx_skbuff */
1750 static void free_skb_resources(struct gfar_private *priv)
1751 {
1752         struct gfar_priv_tx_q *tx_queue = NULL;
1753         struct gfar_priv_rx_q *rx_queue = NULL;
1754         int i;
1755
1756         /* Go through all the buffer descriptors and free their data buffers */
1757         for (i = 0; i < priv->num_tx_queues; i++) {
1758                 tx_queue = priv->tx_queue[i];
1759                 if(tx_queue->tx_skbuff)
1760                         free_skb_tx_queue(tx_queue);
1761         }
1762
1763         for (i = 0; i < priv->num_rx_queues; i++) {
1764                 rx_queue = priv->rx_queue[i];
1765                 if(rx_queue->rx_skbuff)
1766                         free_skb_rx_queue(rx_queue);
1767         }
1768
1769         dma_free_coherent(&priv->ofdev->dev,
1770                         sizeof(struct txbd8) * priv->total_tx_ring_size +
1771                         sizeof(struct rxbd8) * priv->total_rx_ring_size,
1772                         priv->tx_queue[0]->tx_bd_base,
1773                         priv->tx_queue[0]->tx_bd_dma_base);
1774         skb_queue_purge(&priv->rx_recycle);
1775 }
1776
1777 void gfar_start(struct net_device *dev)
1778 {
1779         struct gfar_private *priv = netdev_priv(dev);
1780         struct gfar __iomem *regs = priv->gfargrp[0].regs;
1781         u32 tempval;
1782         int i = 0;
1783
1784         /* Enable Rx and Tx in MACCFG1 */
1785         tempval = gfar_read(&regs->maccfg1);
1786         tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
1787         gfar_write(&regs->maccfg1, tempval);
1788
1789         /* Initialize DMACTRL to have WWR and WOP */
1790         tempval = gfar_read(&regs->dmactrl);
1791         tempval |= DMACTRL_INIT_SETTINGS;
1792         gfar_write(&regs->dmactrl, tempval);
1793
1794         /* Make sure we aren't stopped */
1795         tempval = gfar_read(&regs->dmactrl);
1796         tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
1797         gfar_write(&regs->dmactrl, tempval);
1798
1799         for (i = 0; i < priv->num_grps; i++) {
1800                 regs = priv->gfargrp[i].regs;
1801                 /* Clear THLT/RHLT, so that the DMA starts polling now */
1802                 gfar_write(&regs->tstat, priv->gfargrp[i].tstat);
1803                 gfar_write(&regs->rstat, priv->gfargrp[i].rstat);
1804                 /* Unmask the interrupts we look for */
1805                 gfar_write(&regs->imask, IMASK_DEFAULT);
1806         }
1807
1808         dev->trans_start = jiffies; /* prevent tx timeout */
1809 }
1810
1811 void gfar_configure_coalescing(struct gfar_private *priv,
1812         unsigned long tx_mask, unsigned long rx_mask)
1813 {
1814         struct gfar __iomem *regs = priv->gfargrp[0].regs;
1815         u32 __iomem *baddr;
1816         int i = 0;
1817
1818         /* Backward compatible case ---- even if we enable
1819          * multiple queues, there's only single reg to program
1820          */
1821         gfar_write(&regs->txic, 0);
1822         if(likely(priv->tx_queue[0]->txcoalescing))
1823                 gfar_write(&regs->txic, priv->tx_queue[0]->txic);
1824
1825         gfar_write(&regs->rxic, 0);
1826         if(unlikely(priv->rx_queue[0]->rxcoalescing))
1827                 gfar_write(&regs->rxic, priv->rx_queue[0]->rxic);
1828
1829         if (priv->mode == MQ_MG_MODE) {
1830                 baddr = &regs->txic0;
1831                 for_each_set_bit(i, &tx_mask, priv->num_tx_queues) {
1832                         if (likely(priv->tx_queue[i]->txcoalescing)) {
1833                                 gfar_write(baddr + i, 0);
1834                                 gfar_write(baddr + i, priv->tx_queue[i]->txic);
1835                         }
1836                 }
1837
1838                 baddr = &regs->rxic0;
1839                 for_each_set_bit(i, &rx_mask, priv->num_rx_queues) {
1840                         if (likely(priv->rx_queue[i]->rxcoalescing)) {
1841                                 gfar_write(baddr + i, 0);
1842                                 gfar_write(baddr + i, priv->rx_queue[i]->rxic);
1843                         }
1844                 }
1845         }
1846 }
1847
1848 static int register_grp_irqs(struct gfar_priv_grp *grp)
1849 {
1850         struct gfar_private *priv = grp->priv;
1851         struct net_device *dev = priv->ndev;
1852         int err;
1853
1854         /* If the device has multiple interrupts, register for
1855          * them.  Otherwise, only register for the one */
1856         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1857                 /* Install our interrupt handlers for Error,
1858                  * Transmit, and Receive */
1859                 if ((err = request_irq(grp->interruptError, gfar_error, 0,
1860                                 grp->int_name_er,grp)) < 0) {
1861                         netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1862                                   grp->interruptError);
1863
1864                         goto err_irq_fail;
1865                 }
1866
1867                 if ((err = request_irq(grp->interruptTransmit, gfar_transmit,
1868                                 0, grp->int_name_tx, grp)) < 0) {
1869                         netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1870                                   grp->interruptTransmit);
1871                         goto tx_irq_fail;
1872                 }
1873
1874                 if ((err = request_irq(grp->interruptReceive, gfar_receive, 0,
1875                                 grp->int_name_rx, grp)) < 0) {
1876                         netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1877                                   grp->interruptReceive);
1878                         goto rx_irq_fail;
1879                 }
1880         } else {
1881                 if ((err = request_irq(grp->interruptTransmit, gfar_interrupt, 0,
1882                                 grp->int_name_tx, grp)) < 0) {
1883                         netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1884                                   grp->interruptTransmit);
1885                         goto err_irq_fail;
1886                 }
1887         }
1888
1889         return 0;
1890
1891 rx_irq_fail:
1892         free_irq(grp->interruptTransmit, grp);
1893 tx_irq_fail:
1894         free_irq(grp->interruptError, grp);
1895 err_irq_fail:
1896         return err;
1897
1898 }
1899
1900 /* Bring the controller up and running */
1901 int startup_gfar(struct net_device *ndev)
1902 {
1903         struct gfar_private *priv = netdev_priv(ndev);
1904         struct gfar __iomem *regs = NULL;
1905         int err, i, j;
1906
1907         for (i = 0; i < priv->num_grps; i++) {
1908                 regs= priv->gfargrp[i].regs;
1909                 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1910         }
1911
1912         regs= priv->gfargrp[0].regs;
1913         err = gfar_alloc_skb_resources(ndev);
1914         if (err)
1915                 return err;
1916
1917         gfar_init_mac(ndev);
1918
1919         for (i = 0; i < priv->num_grps; i++) {
1920                 err = register_grp_irqs(&priv->gfargrp[i]);
1921                 if (err) {
1922                         for (j = 0; j < i; j++)
1923                                 free_grp_irqs(&priv->gfargrp[j]);
1924                         goto irq_fail;
1925                 }
1926         }
1927
1928         /* Start the controller */
1929         gfar_start(ndev);
1930
1931         phy_start(priv->phydev);
1932
1933         gfar_configure_coalescing(priv, 0xFF, 0xFF);
1934
1935         return 0;
1936
1937 irq_fail:
1938         free_skb_resources(priv);
1939         return err;
1940 }
1941
1942 /* Called when something needs to use the ethernet device */
1943 /* Returns 0 for success. */
1944 static int gfar_enet_open(struct net_device *dev)
1945 {
1946         struct gfar_private *priv = netdev_priv(dev);
1947         int err;
1948
1949         enable_napi(priv);
1950
1951         skb_queue_head_init(&priv->rx_recycle);
1952
1953         /* Initialize a bunch of registers */
1954         init_registers(dev);
1955
1956         gfar_set_mac_address(dev);
1957
1958         err = init_phy(dev);
1959
1960         if (err) {
1961                 disable_napi(priv);
1962                 return err;
1963         }
1964
1965         err = startup_gfar(dev);
1966         if (err) {
1967                 disable_napi(priv);
1968                 return err;
1969         }
1970
1971         netif_tx_start_all_queues(dev);
1972
1973         device_set_wakeup_enable(&dev->dev, priv->wol_en);
1974
1975         return err;
1976 }
1977
1978 static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb)
1979 {
1980         struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN);
1981
1982         memset(fcb, 0, GMAC_FCB_LEN);
1983
1984         return fcb;
1985 }
1986
1987 static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb,
1988                 int fcb_length)
1989 {
1990         u8 flags = 0;
1991
1992         /* If we're here, it's a IP packet with a TCP or UDP
1993          * payload.  We set it to checksum, using a pseudo-header
1994          * we provide
1995          */
1996         flags = TXFCB_DEFAULT;
1997
1998         /* Tell the controller what the protocol is */
1999         /* And provide the already calculated phcs */
2000         if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
2001                 flags |= TXFCB_UDP;
2002                 fcb->phcs = udp_hdr(skb)->check;
2003         } else
2004                 fcb->phcs = tcp_hdr(skb)->check;
2005
2006         /* l3os is the distance between the start of the
2007          * frame (skb->data) and the start of the IP hdr.
2008          * l4os is the distance between the start of the
2009          * l3 hdr and the l4 hdr */
2010         fcb->l3os = (u16)(skb_network_offset(skb) - fcb_length);
2011         fcb->l4os = skb_network_header_len(skb);
2012
2013         fcb->flags = flags;
2014 }
2015
2016 void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb)
2017 {
2018         fcb->flags |= TXFCB_VLN;
2019         fcb->vlctl = vlan_tx_tag_get(skb);
2020 }
2021
2022 static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride,
2023                                struct txbd8 *base, int ring_size)
2024 {
2025         struct txbd8 *new_bd = bdp + stride;
2026
2027         return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd;
2028 }
2029
2030 static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base,
2031                 int ring_size)
2032 {
2033         return skip_txbd(bdp, 1, base, ring_size);
2034 }
2035
2036 /* This is called by the kernel when a frame is ready for transmission. */
2037 /* It is pointed to by the dev->hard_start_xmit function pointer */
2038 static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
2039 {
2040         struct gfar_private *priv = netdev_priv(dev);
2041         struct gfar_priv_tx_q *tx_queue = NULL;
2042         struct netdev_queue *txq;
2043         struct gfar __iomem *regs = NULL;
2044         struct txfcb *fcb = NULL;
2045         struct txbd8 *txbdp, *txbdp_start, *base, *txbdp_tstamp = NULL;
2046         u32 lstatus;
2047         int i, rq = 0, do_tstamp = 0;
2048         u32 bufaddr;
2049         unsigned long flags;
2050         unsigned int nr_frags, nr_txbds, length, fcb_length = GMAC_FCB_LEN;
2051
2052         /*
2053          * TOE=1 frames larger than 2500 bytes may see excess delays
2054          * before start of transmission.
2055          */
2056         if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_76) &&
2057                         skb->ip_summed == CHECKSUM_PARTIAL &&
2058                         skb->len > 2500)) {
2059                 int ret;
2060
2061                 ret = skb_checksum_help(skb);
2062                 if (ret)
2063                         return ret;
2064         }
2065
2066         rq = skb->queue_mapping;
2067         tx_queue = priv->tx_queue[rq];
2068         txq = netdev_get_tx_queue(dev, rq);
2069         base = tx_queue->tx_bd_base;
2070         regs = tx_queue->grp->regs;
2071
2072         /* check if time stamp should be generated */
2073         if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
2074                         priv->hwts_tx_en)) {
2075                 do_tstamp = 1;
2076                 fcb_length = GMAC_FCB_LEN + GMAC_TXPAL_LEN;
2077         }
2078
2079         /* make space for additional header when fcb is needed */
2080         if (((skb->ip_summed == CHECKSUM_PARTIAL) ||
2081                         vlan_tx_tag_present(skb) ||
2082                         unlikely(do_tstamp)) &&
2083                         (skb_headroom(skb) < fcb_length)) {
2084                 struct sk_buff *skb_new;
2085
2086                 skb_new = skb_realloc_headroom(skb, fcb_length);
2087                 if (!skb_new) {
2088                         dev->stats.tx_errors++;
2089                         kfree_skb(skb);
2090                         return NETDEV_TX_OK;
2091                 }
2092
2093                 /* Steal sock reference for processing TX time stamps */
2094                 swap(skb_new->sk, skb->sk);
2095                 swap(skb_new->destructor, skb->destructor);
2096                 kfree_skb(skb);
2097                 skb = skb_new;
2098         }
2099
2100         /* total number of fragments in the SKB */
2101         nr_frags = skb_shinfo(skb)->nr_frags;
2102
2103         /* calculate the required number of TxBDs for this skb */
2104         if (unlikely(do_tstamp))
2105                 nr_txbds = nr_frags + 2;
2106         else
2107                 nr_txbds = nr_frags + 1;
2108
2109         /* check if there is space to queue this packet */
2110         if (nr_txbds > tx_queue->num_txbdfree) {
2111                 /* no space, stop the queue */
2112                 netif_tx_stop_queue(txq);
2113                 dev->stats.tx_fifo_errors++;
2114                 return NETDEV_TX_BUSY;
2115         }
2116
2117         /* Update transmit stats */
2118         tx_queue->stats.tx_bytes += skb->len;
2119         tx_queue->stats.tx_packets++;
2120
2121         txbdp = txbdp_start = tx_queue->cur_tx;
2122         lstatus = txbdp->lstatus;
2123
2124         /* Time stamp insertion requires one additional TxBD */
2125         if (unlikely(do_tstamp))
2126                 txbdp_tstamp = txbdp = next_txbd(txbdp, base,
2127                                 tx_queue->tx_ring_size);
2128
2129         if (nr_frags == 0) {
2130                 if (unlikely(do_tstamp))
2131                         txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_LAST |
2132                                         TXBD_INTERRUPT);
2133                 else
2134                         lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
2135         } else {
2136                 /* Place the fragment addresses and lengths into the TxBDs */
2137                 for (i = 0; i < nr_frags; i++) {
2138                         /* Point at the next BD, wrapping as needed */
2139                         txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size);
2140
2141                         length = skb_shinfo(skb)->frags[i].size;
2142
2143                         lstatus = txbdp->lstatus | length |
2144                                 BD_LFLAG(TXBD_READY);
2145
2146                         /* Handle the last BD specially */
2147                         if (i == nr_frags - 1)
2148                                 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
2149
2150                         bufaddr = skb_frag_dma_map(&priv->ofdev->dev,
2151                                                    &skb_shinfo(skb)->frags[i],
2152                                                    0,
2153                                                    length,
2154                                                    DMA_TO_DEVICE);
2155
2156                         /* set the TxBD length and buffer pointer */
2157                         txbdp->bufPtr = bufaddr;
2158                         txbdp->lstatus = lstatus;
2159                 }
2160
2161                 lstatus = txbdp_start->lstatus;
2162         }
2163
2164         /* Add TxPAL between FCB and frame if required */
2165         if (unlikely(do_tstamp)) {
2166                 skb_push(skb, GMAC_TXPAL_LEN);
2167                 memset(skb->data, 0, GMAC_TXPAL_LEN);
2168         }
2169
2170         /* Set up checksumming */
2171         if (CHECKSUM_PARTIAL == skb->ip_summed) {
2172                 fcb = gfar_add_fcb(skb);
2173                 /* as specified by errata */
2174                 if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_12)
2175                              && ((unsigned long)fcb % 0x20) > 0x18)) {
2176                         __skb_pull(skb, GMAC_FCB_LEN);
2177                         skb_checksum_help(skb);
2178                 } else {
2179                         lstatus |= BD_LFLAG(TXBD_TOE);
2180                         gfar_tx_checksum(skb, fcb, fcb_length);
2181                 }
2182         }
2183
2184         if (vlan_tx_tag_present(skb)) {
2185                 if (unlikely(NULL == fcb)) {
2186                         fcb = gfar_add_fcb(skb);
2187                         lstatus |= BD_LFLAG(TXBD_TOE);
2188                 }
2189
2190                 gfar_tx_vlan(skb, fcb);
2191         }
2192
2193         /* Setup tx hardware time stamping if requested */
2194         if (unlikely(do_tstamp)) {
2195                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
2196                 if (fcb == NULL)
2197                         fcb = gfar_add_fcb(skb);
2198                 fcb->ptp = 1;
2199                 lstatus |= BD_LFLAG(TXBD_TOE);
2200         }
2201
2202         txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data,
2203                         skb_headlen(skb), DMA_TO_DEVICE);
2204
2205         /*
2206          * If time stamping is requested one additional TxBD must be set up. The
2207          * first TxBD points to the FCB and must have a data length of
2208          * GMAC_FCB_LEN. The second TxBD points to the actual frame data with
2209          * the full frame length.
2210          */
2211         if (unlikely(do_tstamp)) {
2212                 txbdp_tstamp->bufPtr = txbdp_start->bufPtr + fcb_length;
2213                 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_READY) |
2214                                 (skb_headlen(skb) - fcb_length);
2215                 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | GMAC_FCB_LEN;
2216         } else {
2217                 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
2218         }
2219
2220         /*
2221          * We can work in parallel with gfar_clean_tx_ring(), except
2222          * when modifying num_txbdfree. Note that we didn't grab the lock
2223          * when we were reading the num_txbdfree and checking for available
2224          * space, that's because outside of this function it can only grow,
2225          * and once we've got needed space, it cannot suddenly disappear.
2226          *
2227          * The lock also protects us from gfar_error(), which can modify
2228          * regs->tstat and thus retrigger the transfers, which is why we
2229          * also must grab the lock before setting ready bit for the first
2230          * to be transmitted BD.
2231          */
2232         spin_lock_irqsave(&tx_queue->txlock, flags);
2233
2234         /*
2235          * The powerpc-specific eieio() is used, as wmb() has too strong
2236          * semantics (it requires synchronization between cacheable and
2237          * uncacheable mappings, which eieio doesn't provide and which we
2238          * don't need), thus requiring a more expensive sync instruction.  At
2239          * some point, the set of architecture-independent barrier functions
2240          * should be expanded to include weaker barriers.
2241          */
2242         eieio();
2243
2244         txbdp_start->lstatus = lstatus;
2245
2246         eieio(); /* force lstatus write before tx_skbuff */
2247
2248         tx_queue->tx_skbuff[tx_queue->skb_curtx] = skb;
2249
2250         /* Update the current skb pointer to the next entry we will use
2251          * (wrapping if necessary) */
2252         tx_queue->skb_curtx = (tx_queue->skb_curtx + 1) &
2253                 TX_RING_MOD_MASK(tx_queue->tx_ring_size);
2254
2255         tx_queue->cur_tx = next_txbd(txbdp, base, tx_queue->tx_ring_size);
2256
2257         /* reduce TxBD free count */
2258         tx_queue->num_txbdfree -= (nr_txbds);
2259
2260         /* If the next BD still needs to be cleaned up, then the bds
2261            are full.  We need to tell the kernel to stop sending us stuff. */
2262         if (!tx_queue->num_txbdfree) {
2263                 netif_tx_stop_queue(txq);
2264
2265                 dev->stats.tx_fifo_errors++;
2266         }
2267
2268         /* Tell the DMA to go go go */
2269         gfar_write(&regs->tstat, TSTAT_CLEAR_THALT >> tx_queue->qindex);
2270
2271         /* Unlock priv */
2272         spin_unlock_irqrestore(&tx_queue->txlock, flags);
2273
2274         return NETDEV_TX_OK;
2275 }
2276
2277 /* Stops the kernel queue, and halts the controller */
2278 static int gfar_close(struct net_device *dev)
2279 {
2280         struct gfar_private *priv = netdev_priv(dev);
2281
2282         disable_napi(priv);
2283
2284         cancel_work_sync(&priv->reset_task);
2285         stop_gfar(dev);
2286
2287         /* Disconnect from the PHY */
2288         phy_disconnect(priv->phydev);
2289         priv->phydev = NULL;
2290
2291         netif_tx_stop_all_queues(dev);
2292
2293         return 0;
2294 }
2295
2296 /* Changes the mac address if the controller is not running. */
2297 static int gfar_set_mac_address(struct net_device *dev)
2298 {
2299         gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
2300
2301         return 0;
2302 }
2303
2304 /* Check if rx parser should be activated */
2305 void gfar_check_rx_parser_mode(struct gfar_private *priv)
2306 {
2307         struct gfar __iomem *regs;
2308         u32 tempval;
2309
2310         regs = priv->gfargrp[0].regs;
2311
2312         tempval = gfar_read(&regs->rctrl);
2313         /* If parse is no longer required, then disable parser */
2314         if (tempval & RCTRL_REQ_PARSER)
2315                 tempval |= RCTRL_PRSDEP_INIT;
2316         else
2317                 tempval &= ~RCTRL_PRSDEP_INIT;
2318         gfar_write(&regs->rctrl, tempval);
2319 }
2320
2321 /* Enables and disables VLAN insertion/extraction */
2322 void gfar_vlan_mode(struct net_device *dev, netdev_features_t features)
2323 {
2324         struct gfar_private *priv = netdev_priv(dev);
2325         struct gfar __iomem *regs = NULL;
2326         unsigned long flags;
2327         u32 tempval;
2328
2329         regs = priv->gfargrp[0].regs;
2330         local_irq_save(flags);
2331         lock_rx_qs(priv);
2332
2333         if (features & NETIF_F_HW_VLAN_TX) {
2334                 /* Enable VLAN tag insertion */
2335                 tempval = gfar_read(&regs->tctrl);
2336                 tempval |= TCTRL_VLINS;
2337                 gfar_write(&regs->tctrl, tempval);
2338         } else {
2339                 /* Disable VLAN tag insertion */
2340                 tempval = gfar_read(&regs->tctrl);
2341                 tempval &= ~TCTRL_VLINS;
2342                 gfar_write(&regs->tctrl, tempval);
2343         }
2344
2345         if (features & NETIF_F_HW_VLAN_RX) {
2346                 /* Enable VLAN tag extraction */
2347                 tempval = gfar_read(&regs->rctrl);
2348                 tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT);
2349                 gfar_write(&regs->rctrl, tempval);
2350         } else {
2351                 /* Disable VLAN tag extraction */
2352                 tempval = gfar_read(&regs->rctrl);
2353                 tempval &= ~RCTRL_VLEX;
2354                 gfar_write(&regs->rctrl, tempval);
2355
2356                 gfar_check_rx_parser_mode(priv);
2357         }
2358
2359         gfar_change_mtu(dev, dev->mtu);
2360
2361         unlock_rx_qs(priv);
2362         local_irq_restore(flags);
2363 }
2364
2365 static int gfar_change_mtu(struct net_device *dev, int new_mtu)
2366 {
2367         int tempsize, tempval;
2368         struct gfar_private *priv = netdev_priv(dev);
2369         struct gfar __iomem *regs = priv->gfargrp[0].regs;
2370         int oldsize = priv->rx_buffer_size;
2371         int frame_size = new_mtu + ETH_HLEN;
2372
2373         if (gfar_is_vlan_on(priv))
2374                 frame_size += VLAN_HLEN;
2375
2376         if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
2377                 netif_err(priv, drv, dev, "Invalid MTU setting\n");
2378                 return -EINVAL;
2379         }
2380
2381         if (gfar_uses_fcb(priv))
2382                 frame_size += GMAC_FCB_LEN;
2383
2384         frame_size += priv->padding;
2385
2386         tempsize =
2387             (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
2388             INCREMENTAL_BUFFER_SIZE;
2389
2390         /* Only stop and start the controller if it isn't already
2391          * stopped, and we changed something */
2392         if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2393                 stop_gfar(dev);
2394
2395         priv->rx_buffer_size = tempsize;
2396
2397         dev->mtu = new_mtu;
2398
2399         gfar_write(&regs->mrblr, priv->rx_buffer_size);
2400         gfar_write(&regs->maxfrm, priv->rx_buffer_size);
2401
2402         /* If the mtu is larger than the max size for standard
2403          * ethernet frames (ie, a jumbo frame), then set maccfg2
2404          * to allow huge frames, and to check the length */
2405         tempval = gfar_read(&regs->maccfg2);
2406
2407         if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE ||
2408                         gfar_has_errata(priv, GFAR_ERRATA_74))
2409                 tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2410         else
2411                 tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2412
2413         gfar_write(&regs->maccfg2, tempval);
2414
2415         if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2416                 startup_gfar(dev);
2417
2418         return 0;
2419 }
2420
2421 /* gfar_reset_task gets scheduled when a packet has not been
2422  * transmitted after a set amount of time.
2423  * For now, assume that clearing out all the structures, and
2424  * starting over will fix the problem.
2425  */
2426 static void gfar_reset_task(struct work_struct *work)
2427 {
2428         struct gfar_private *priv = container_of(work, struct gfar_private,
2429                         reset_task);
2430         struct net_device *dev = priv->ndev;
2431
2432         if (dev->flags & IFF_UP) {
2433                 netif_tx_stop_all_queues(dev);
2434                 stop_gfar(dev);
2435                 startup_gfar(dev);
2436                 netif_tx_start_all_queues(dev);
2437         }
2438
2439         netif_tx_schedule_all(dev);
2440 }
2441
2442 static void gfar_timeout(struct net_device *dev)
2443 {
2444         struct gfar_private *priv = netdev_priv(dev);
2445
2446         dev->stats.tx_errors++;
2447         schedule_work(&priv->reset_task);
2448 }
2449
2450 static void gfar_align_skb(struct sk_buff *skb)
2451 {
2452         /* We need the data buffer to be aligned properly.  We will reserve
2453          * as many bytes as needed to align the data properly
2454          */
2455         skb_reserve(skb, RXBUF_ALIGNMENT -
2456                 (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)));
2457 }
2458
2459 /* Interrupt Handler for Transmit complete */
2460 static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
2461 {
2462         struct net_device *dev = tx_queue->dev;
2463         struct gfar_private *priv = netdev_priv(dev);
2464         struct gfar_priv_rx_q *rx_queue = NULL;
2465         struct txbd8 *bdp, *next = NULL;
2466         struct txbd8 *lbdp = NULL;
2467         struct txbd8 *base = tx_queue->tx_bd_base;
2468         struct sk_buff *skb;
2469         int skb_dirtytx;
2470         int tx_ring_size = tx_queue->tx_ring_size;
2471         int frags = 0, nr_txbds = 0;
2472         int i;
2473         int howmany = 0;
2474         u32 lstatus;
2475         size_t buflen;
2476
2477         rx_queue = priv->rx_queue[tx_queue->qindex];
2478         bdp = tx_queue->dirty_tx;
2479         skb_dirtytx = tx_queue->skb_dirtytx;
2480
2481         while ((skb = tx_queue->tx_skbuff[skb_dirtytx])) {
2482                 unsigned long flags;
2483
2484                 frags = skb_shinfo(skb)->nr_frags;
2485
2486                 /*
2487                  * When time stamping, one additional TxBD must be freed.
2488                  * Also, we need to dma_unmap_single() the TxPAL.
2489                  */
2490                 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))
2491                         nr_txbds = frags + 2;
2492                 else
2493                         nr_txbds = frags + 1;
2494
2495                 lbdp = skip_txbd(bdp, nr_txbds - 1, base, tx_ring_size);
2496
2497                 lstatus = lbdp->lstatus;
2498
2499                 /* Only clean completed frames */
2500                 if ((lstatus & BD_LFLAG(TXBD_READY)) &&
2501                                 (lstatus & BD_LENGTH_MASK))
2502                         break;
2503
2504                 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
2505                         next = next_txbd(bdp, base, tx_ring_size);
2506                         buflen = next->length + GMAC_FCB_LEN + GMAC_TXPAL_LEN;
2507                 } else
2508                         buflen = bdp->length;
2509
2510                 dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
2511                                 buflen, DMA_TO_DEVICE);
2512
2513                 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
2514                         struct skb_shared_hwtstamps shhwtstamps;
2515                         u64 *ns = (u64*) (((u32)skb->data + 0x10) & ~0x7);
2516                         memset(&shhwtstamps, 0, sizeof(shhwtstamps));
2517                         shhwtstamps.hwtstamp = ns_to_ktime(*ns);
2518                         skb_pull(skb, GMAC_FCB_LEN + GMAC_TXPAL_LEN);
2519                         skb_tstamp_tx(skb, &shhwtstamps);
2520                         bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2521                         bdp = next;
2522                 }
2523
2524                 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2525                 bdp = next_txbd(bdp, base, tx_ring_size);
2526
2527                 for (i = 0; i < frags; i++) {
2528                         dma_unmap_page(&priv->ofdev->dev,
2529                                         bdp->bufPtr,
2530                                         bdp->length,
2531                                         DMA_TO_DEVICE);
2532                         bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2533                         bdp = next_txbd(bdp, base, tx_ring_size);
2534                 }
2535
2536                 /*
2537                  * If there's room in the queue (limit it to rx_buffer_size)
2538                  * we add this skb back into the pool, if it's the right size
2539                  */
2540                 if (skb_queue_len(&priv->rx_recycle) < rx_queue->rx_ring_size &&
2541                                 skb_recycle_check(skb, priv->rx_buffer_size +
2542                                         RXBUF_ALIGNMENT)) {
2543                         gfar_align_skb(skb);
2544                         skb_queue_head(&priv->rx_recycle, skb);
2545                 } else
2546                         dev_kfree_skb_any(skb);
2547
2548                 tx_queue->tx_skbuff[skb_dirtytx] = NULL;
2549
2550                 skb_dirtytx = (skb_dirtytx + 1) &
2551                         TX_RING_MOD_MASK(tx_ring_size);
2552
2553                 howmany++;
2554                 spin_lock_irqsave(&tx_queue->txlock, flags);
2555                 tx_queue->num_txbdfree += nr_txbds;
2556                 spin_unlock_irqrestore(&tx_queue->txlock, flags);
2557         }
2558
2559         /* If we freed a buffer, we can restart transmission, if necessary */
2560         if (__netif_subqueue_stopped(dev, tx_queue->qindex) && tx_queue->num_txbdfree)
2561                 netif_wake_subqueue(dev, tx_queue->qindex);
2562
2563         /* Update dirty indicators */
2564         tx_queue->skb_dirtytx = skb_dirtytx;
2565         tx_queue->dirty_tx = bdp;
2566
2567         return howmany;
2568 }
2569
2570 static void gfar_schedule_cleanup(struct gfar_priv_grp *gfargrp)
2571 {
2572         unsigned long flags;
2573
2574         spin_lock_irqsave(&gfargrp->grplock, flags);
2575         if (napi_schedule_prep(&gfargrp->napi)) {
2576                 gfar_write(&gfargrp->regs->imask, IMASK_RTX_DISABLED);
2577                 __napi_schedule(&gfargrp->napi);
2578         } else {
2579                 /*
2580                  * Clear IEVENT, so interrupts aren't called again
2581                  * because of the packets that have already arrived.
2582                  */
2583                 gfar_write(&gfargrp->regs->ievent, IEVENT_RTX_MASK);
2584         }
2585         spin_unlock_irqrestore(&gfargrp->grplock, flags);
2586
2587 }
2588
2589 /* Interrupt Handler for Transmit complete */
2590 static irqreturn_t gfar_transmit(int irq, void *grp_id)
2591 {
2592         gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
2593         return IRQ_HANDLED;
2594 }
2595
2596 static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
2597                 struct sk_buff *skb)
2598 {
2599         struct net_device *dev = rx_queue->dev;
2600         struct gfar_private *priv = netdev_priv(dev);
2601         dma_addr_t buf;
2602
2603         buf = dma_map_single(&priv->ofdev->dev, skb->data,
2604                              priv->rx_buffer_size, DMA_FROM_DEVICE);
2605         gfar_init_rxbdp(rx_queue, bdp, buf);
2606 }
2607
2608 static struct sk_buff * gfar_alloc_skb(struct net_device *dev)
2609 {
2610         struct gfar_private *priv = netdev_priv(dev);
2611         struct sk_buff *skb = NULL;
2612
2613         skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
2614         if (!skb)
2615                 return NULL;
2616
2617         gfar_align_skb(skb);
2618
2619         return skb;
2620 }
2621
2622 struct sk_buff * gfar_new_skb(struct net_device *dev)
2623 {
2624         struct gfar_private *priv = netdev_priv(dev);
2625         struct sk_buff *skb = NULL;
2626
2627         skb = skb_dequeue(&priv->rx_recycle);
2628         if (!skb)
2629                 skb = gfar_alloc_skb(dev);
2630
2631         return skb;
2632 }
2633
2634 static inline void count_errors(unsigned short status, struct net_device *dev)
2635 {
2636         struct gfar_private *priv = netdev_priv(dev);
2637         struct net_device_stats *stats = &dev->stats;
2638         struct gfar_extra_stats *estats = &priv->extra_stats;
2639
2640         /* If the packet was truncated, none of the other errors
2641          * matter */
2642         if (status & RXBD_TRUNCATED) {
2643                 stats->rx_length_errors++;
2644
2645                 estats->rx_trunc++;
2646
2647                 return;
2648         }
2649         /* Count the errors, if there were any */
2650         if (status & (RXBD_LARGE | RXBD_SHORT)) {
2651                 stats->rx_length_errors++;
2652
2653                 if (status & RXBD_LARGE)
2654                         estats->rx_large++;
2655                 else
2656                         estats->rx_short++;
2657         }
2658         if (status & RXBD_NONOCTET) {
2659                 stats->rx_frame_errors++;
2660                 estats->rx_nonoctet++;
2661         }
2662         if (status & RXBD_CRCERR) {
2663                 estats->rx_crcerr++;
2664                 stats->rx_crc_errors++;
2665         }
2666         if (status & RXBD_OVERRUN) {
2667                 estats->rx_overrun++;
2668                 stats->rx_crc_errors++;
2669         }
2670 }
2671
2672 irqreturn_t gfar_receive(int irq, void *grp_id)
2673 {
2674         gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
2675         return IRQ_HANDLED;
2676 }
2677
2678 static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb)
2679 {
2680         /* If valid headers were found, and valid sums
2681          * were verified, then we tell the kernel that no
2682          * checksumming is necessary.  Otherwise, it is */
2683         if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU))
2684                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2685         else
2686                 skb_checksum_none_assert(skb);
2687 }
2688
2689
2690 /* gfar_process_frame() -- handle one incoming packet if skb
2691  * isn't NULL.  */
2692 static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
2693                               int amount_pull)
2694 {
2695         struct gfar_private *priv = netdev_priv(dev);
2696         struct rxfcb *fcb = NULL;
2697
2698         int ret;
2699
2700         /* fcb is at the beginning if exists */
2701         fcb = (struct rxfcb *)skb->data;
2702
2703         /* Remove the FCB from the skb */
2704         /* Remove the padded bytes, if there are any */
2705         if (amount_pull) {
2706                 skb_record_rx_queue(skb, fcb->rq);
2707                 skb_pull(skb, amount_pull);
2708         }
2709
2710         /* Get receive timestamp from the skb */
2711         if (priv->hwts_rx_en) {
2712                 struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb);
2713                 u64 *ns = (u64 *) skb->data;
2714                 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
2715                 shhwtstamps->hwtstamp = ns_to_ktime(*ns);
2716         }
2717
2718         if (priv->padding)
2719                 skb_pull(skb, priv->padding);
2720
2721         if (dev->features & NETIF_F_RXCSUM)
2722                 gfar_rx_checksum(skb, fcb);
2723
2724         /* Tell the skb what kind of packet this is */
2725         skb->protocol = eth_type_trans(skb, dev);
2726
2727         /*
2728          * There's need to check for NETIF_F_HW_VLAN_RX here.
2729          * Even if vlan rx accel is disabled, on some chips
2730          * RXFCB_VLN is pseudo randomly set.
2731          */
2732         if (dev->features & NETIF_F_HW_VLAN_RX &&
2733             fcb->flags & RXFCB_VLN)
2734                 __vlan_hwaccel_put_tag(skb, fcb->vlctl);
2735
2736         /* Send the packet up the stack */
2737         ret = netif_receive_skb(skb);
2738
2739         if (NET_RX_DROP == ret)
2740                 priv->extra_stats.kernel_dropped++;
2741
2742         return 0;
2743 }
2744
2745 /* gfar_clean_rx_ring() -- Processes each frame in the rx ring
2746  *   until the budget/quota has been reached. Returns the number
2747  *   of frames handled
2748  */
2749 int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit)
2750 {
2751         struct net_device *dev = rx_queue->dev;
2752         struct rxbd8 *bdp, *base;
2753         struct sk_buff *skb;
2754         int pkt_len;
2755         int amount_pull;
2756         int howmany = 0;
2757         struct gfar_private *priv = netdev_priv(dev);
2758
2759         /* Get the first full descriptor */
2760         bdp = rx_queue->cur_rx;
2761         base = rx_queue->rx_bd_base;
2762
2763         amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0);
2764
2765         while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) {
2766                 struct sk_buff *newskb;
2767                 rmb();
2768
2769                 /* Add another skb for the future */
2770                 newskb = gfar_new_skb(dev);
2771
2772                 skb = rx_queue->rx_skbuff[rx_queue->skb_currx];
2773
2774                 dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
2775                                 priv->rx_buffer_size, DMA_FROM_DEVICE);
2776
2777                 if (unlikely(!(bdp->status & RXBD_ERR) &&
2778                                 bdp->length > priv->rx_buffer_size))
2779                         bdp->status = RXBD_LARGE;
2780
2781                 /* We drop the frame if we failed to allocate a new buffer */
2782                 if (unlikely(!newskb || !(bdp->status & RXBD_LAST) ||
2783                                  bdp->status & RXBD_ERR)) {
2784                         count_errors(bdp->status, dev);
2785
2786                         if (unlikely(!newskb))
2787                                 newskb = skb;
2788                         else if (skb)
2789                                 skb_queue_head(&priv->rx_recycle, skb);
2790                 } else {
2791                         /* Increment the number of packets */
2792                         rx_queue->stats.rx_packets++;
2793                         howmany++;
2794
2795                         if (likely(skb)) {
2796                                 pkt_len = bdp->length - ETH_FCS_LEN;
2797                                 /* Remove the FCS from the packet length */
2798                                 skb_put(skb, pkt_len);
2799                                 rx_queue->stats.rx_bytes += pkt_len;
2800                                 skb_record_rx_queue(skb, rx_queue->qindex);
2801                                 gfar_process_frame(dev, skb, amount_pull);
2802
2803                         } else {
2804                                 netif_warn(priv, rx_err, dev, "Missing skb!\n");
2805                                 rx_queue->stats.rx_dropped++;
2806                                 priv->extra_stats.rx_skbmissing++;
2807                         }
2808
2809                 }
2810
2811                 rx_queue->rx_skbuff[rx_queue->skb_currx] = newskb;
2812
2813                 /* Setup the new bdp */
2814                 gfar_new_rxbdp(rx_queue, bdp, newskb);
2815
2816                 /* Update to the next pointer */
2817                 bdp = next_bd(bdp, base, rx_queue->rx_ring_size);
2818
2819                 /* update to point at the next skb */
2820                 rx_queue->skb_currx =
2821                     (rx_queue->skb_currx + 1) &
2822                     RX_RING_MOD_MASK(rx_queue->rx_ring_size);
2823         }
2824
2825         /* Update the current rxbd pointer to be the next one */
2826         rx_queue->cur_rx = bdp;
2827
2828         return howmany;
2829 }
2830
2831 static int gfar_poll(struct napi_struct *napi, int budget)
2832 {
2833         struct gfar_priv_grp *gfargrp = container_of(napi,
2834                         struct gfar_priv_grp, napi);
2835         struct gfar_private *priv = gfargrp->priv;
2836         struct gfar __iomem *regs = gfargrp->regs;
2837         struct gfar_priv_tx_q *tx_queue = NULL;
2838         struct gfar_priv_rx_q *rx_queue = NULL;
2839         int rx_cleaned = 0, budget_per_queue = 0, rx_cleaned_per_queue = 0;
2840         int tx_cleaned = 0, i, left_over_budget = budget;
2841         unsigned long serviced_queues = 0;
2842         int num_queues = 0;
2843
2844         num_queues = gfargrp->num_rx_queues;
2845         budget_per_queue = budget/num_queues;
2846
2847         /* Clear IEVENT, so interrupts aren't called again
2848          * because of the packets that have already arrived */
2849         gfar_write(&regs->ievent, IEVENT_RTX_MASK);
2850
2851         while (num_queues && left_over_budget) {
2852
2853                 budget_per_queue = left_over_budget/num_queues;
2854                 left_over_budget = 0;
2855
2856                 for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
2857                         if (test_bit(i, &serviced_queues))
2858                                 continue;
2859                         rx_queue = priv->rx_queue[i];
2860                         tx_queue = priv->tx_queue[rx_queue->qindex];
2861
2862                         tx_cleaned += gfar_clean_tx_ring(tx_queue);
2863                         rx_cleaned_per_queue = gfar_clean_rx_ring(rx_queue,
2864                                                         budget_per_queue);
2865                         rx_cleaned += rx_cleaned_per_queue;
2866                         if(rx_cleaned_per_queue < budget_per_queue) {
2867                                 left_over_budget = left_over_budget +
2868                                         (budget_per_queue - rx_cleaned_per_queue);
2869                                 set_bit(i, &serviced_queues);
2870                                 num_queues--;
2871                         }
2872                 }
2873         }
2874
2875         if (tx_cleaned)
2876                 return budget;
2877
2878         if (rx_cleaned < budget) {
2879                 napi_complete(napi);
2880
2881                 /* Clear the halt bit in RSTAT */
2882                 gfar_write(&regs->rstat, gfargrp->rstat);
2883
2884                 gfar_write(&regs->imask, IMASK_DEFAULT);
2885
2886                 /* If we are coalescing interrupts, update the timer */
2887                 /* Otherwise, clear it */
2888                 gfar_configure_coalescing(priv,
2889                                 gfargrp->rx_bit_map, gfargrp->tx_bit_map);
2890         }
2891
2892         return rx_cleaned;
2893 }
2894
2895 #ifdef CONFIG_NET_POLL_CONTROLLER
2896 /*
2897  * Polling 'interrupt' - used by things like netconsole to send skbs
2898  * without having to re-enable interrupts. It's not called while
2899  * the interrupt routine is executing.
2900  */
2901 static void gfar_netpoll(struct net_device *dev)
2902 {
2903         struct gfar_private *priv = netdev_priv(dev);
2904         int i = 0;
2905
2906         /* If the device has multiple interrupts, run tx/rx */
2907         if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
2908                 for (i = 0; i < priv->num_grps; i++) {
2909                         disable_irq(priv->gfargrp[i].interruptTransmit);
2910                         disable_irq(priv->gfargrp[i].interruptReceive);
2911                         disable_irq(priv->gfargrp[i].interruptError);
2912                         gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2913                                                 &priv->gfargrp[i]);
2914                         enable_irq(priv->gfargrp[i].interruptError);
2915                         enable_irq(priv->gfargrp[i].interruptReceive);
2916                         enable_irq(priv->gfargrp[i].interruptTransmit);
2917                 }
2918         } else {
2919                 for (i = 0; i < priv->num_grps; i++) {
2920                         disable_irq(priv->gfargrp[i].interruptTransmit);
2921                         gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2922                                                 &priv->gfargrp[i]);
2923                         enable_irq(priv->gfargrp[i].interruptTransmit);
2924                 }
2925         }
2926 }
2927 #endif
2928
2929 /* The interrupt handler for devices with one interrupt */
2930 static irqreturn_t gfar_interrupt(int irq, void *grp_id)
2931 {
2932         struct gfar_priv_grp *gfargrp = grp_id;
2933
2934         /* Save ievent for future reference */
2935         u32 events = gfar_read(&gfargrp->regs->ievent);
2936
2937         /* Check for reception */
2938         if (events & IEVENT_RX_MASK)
2939                 gfar_receive(irq, grp_id);
2940
2941         /* Check for transmit completion */
2942         if (events & IEVENT_TX_MASK)
2943                 gfar_transmit(irq, grp_id);
2944
2945         /* Check for errors */
2946         if (events & IEVENT_ERR_MASK)
2947                 gfar_error(irq, grp_id);
2948
2949         return IRQ_HANDLED;
2950 }
2951
2952 /* Called every time the controller might need to be made
2953  * aware of new link state.  The PHY code conveys this
2954  * information through variables in the phydev structure, and this
2955  * function converts those variables into the appropriate
2956  * register values, and can bring down the device if needed.
2957  */
2958 static void adjust_link(struct net_device *dev)
2959 {
2960         struct gfar_private *priv = netdev_priv(dev);
2961         struct gfar __iomem *regs = priv->gfargrp[0].regs;
2962         unsigned long flags;
2963         struct phy_device *phydev = priv->phydev;
2964         int new_state = 0;
2965
2966         local_irq_save(flags);
2967         lock_tx_qs(priv);
2968
2969         if (phydev->link) {
2970                 u32 tempval = gfar_read(&regs->maccfg2);
2971                 u32 ecntrl = gfar_read(&regs->ecntrl);
2972
2973                 /* Now we make sure that we can be in full duplex mode.
2974                  * If not, we operate in half-duplex mode. */
2975                 if (phydev->duplex != priv->oldduplex) {
2976                         new_state = 1;
2977                         if (!(phydev->duplex))
2978                                 tempval &= ~(MACCFG2_FULL_DUPLEX);
2979                         else
2980                                 tempval |= MACCFG2_FULL_DUPLEX;
2981
2982                         priv->oldduplex = phydev->duplex;
2983                 }
2984
2985                 if (phydev->speed != priv->oldspeed) {
2986                         new_state = 1;
2987                         switch (phydev->speed) {
2988                         case 1000:
2989                                 tempval =
2990                                     ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
2991
2992                                 ecntrl &= ~(ECNTRL_R100);
2993                                 break;
2994                         case 100:
2995                         case 10:
2996                                 tempval =
2997                                     ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
2998
2999                                 /* Reduced mode distinguishes
3000                                  * between 10 and 100 */
3001                                 if (phydev->speed == SPEED_100)
3002                                         ecntrl |= ECNTRL_R100;
3003                                 else
3004                                         ecntrl &= ~(ECNTRL_R100);
3005                                 break;
3006                         default:
3007                                 netif_warn(priv, link, dev,
3008                                            "Ack!  Speed (%d) is not 10/100/1000!\n",
3009                                            phydev->speed);
3010                                 break;
3011                         }
3012
3013                         priv->oldspeed = phydev->speed;
3014                 }
3015
3016                 gfar_write(&regs->maccfg2, tempval);
3017                 gfar_write(&regs->ecntrl, ecntrl);
3018
3019                 if (!priv->oldlink) {
3020                         new_state = 1;
3021                         priv->oldlink = 1;
3022                 }
3023         } else if (priv->oldlink) {
3024                 new_state = 1;
3025                 priv->oldlink = 0;
3026                 priv->oldspeed = 0;
3027                 priv->oldduplex = -1;
3028         }
3029
3030         if (new_state && netif_msg_link(priv))
3031                 phy_print_status(phydev);
3032         unlock_tx_qs(priv);
3033         local_irq_restore(flags);
3034 }
3035
3036 /* Update the hash table based on the current list of multicast
3037  * addresses we subscribe to.  Also, change the promiscuity of
3038  * the device based on the flags (this function is called
3039  * whenever dev->flags is changed */
3040 static void gfar_set_multi(struct net_device *dev)
3041 {
3042         struct netdev_hw_addr *ha;
3043         struct gfar_private *priv = netdev_priv(dev);
3044         struct gfar __iomem *regs = priv->gfargrp[0].regs;
3045         u32 tempval;
3046
3047         if (dev->flags & IFF_PROMISC) {
3048                 /* Set RCTRL to PROM */
3049                 tempval = gfar_read(&regs->rctrl);
3050                 tempval |= RCTRL_PROM;
3051                 gfar_write(&regs->rctrl, tempval);
3052         } else {
3053                 /* Set RCTRL to not PROM */
3054                 tempval = gfar_read(&regs->rctrl);
3055                 tempval &= ~(RCTRL_PROM);
3056                 gfar_write(&regs->rctrl, tempval);
3057         }
3058
3059         if (dev->flags & IFF_ALLMULTI) {
3060                 /* Set the hash to rx all multicast frames */
3061                 gfar_write(&regs->igaddr0, 0xffffffff);
3062                 gfar_write(&regs->igaddr1, 0xffffffff);
3063                 gfar_write(&regs->igaddr2, 0xffffffff);
3064                 gfar_write(&regs->igaddr3, 0xffffffff);
3065                 gfar_write(&regs->igaddr4, 0xffffffff);
3066                 gfar_write(&regs->igaddr5, 0xffffffff);
3067                 gfar_write(&regs->igaddr6, 0xffffffff);
3068                 gfar_write(&regs->igaddr7, 0xffffffff);
3069                 gfar_write(&regs->gaddr0, 0xffffffff);
3070                 gfar_write(&regs->gaddr1, 0xffffffff);
3071                 gfar_write(&regs->gaddr2, 0xffffffff);
3072                 gfar_write(&regs->gaddr3, 0xffffffff);
3073                 gfar_write(&regs->gaddr4, 0xffffffff);
3074                 gfar_write(&regs->gaddr5, 0xffffffff);
3075                 gfar_write(&regs->gaddr6, 0xffffffff);
3076                 gfar_write(&regs->gaddr7, 0xffffffff);
3077         } else {
3078                 int em_num;
3079                 int idx;
3080
3081                 /* zero out the hash */
3082                 gfar_write(&regs->igaddr0, 0x0);
3083                 gfar_write(&regs->igaddr1, 0x0);
3084                 gfar_write(&regs->igaddr2, 0x0);
3085                 gfar_write(&regs->igaddr3, 0x0);
3086                 gfar_write(&regs->igaddr4, 0x0);
3087                 gfar_write(&regs->igaddr5, 0x0);
3088                 gfar_write(&regs->igaddr6, 0x0);
3089                 gfar_write(&regs->igaddr7, 0x0);
3090                 gfar_write(&regs->gaddr0, 0x0);
3091                 gfar_write(&regs->gaddr1, 0x0);
3092                 gfar_write(&regs->gaddr2, 0x0);
3093                 gfar_write(&regs->gaddr3, 0x0);
3094                 gfar_write(&regs->gaddr4, 0x0);
3095                 gfar_write(&regs->gaddr5, 0x0);
3096                 gfar_write(&regs->gaddr6, 0x0);
3097                 gfar_write(&regs->gaddr7, 0x0);
3098
3099                 /* If we have extended hash tables, we need to
3100                  * clear the exact match registers to prepare for
3101                  * setting them */
3102                 if (priv->extended_hash) {
3103                         em_num = GFAR_EM_NUM + 1;
3104                         gfar_clear_exact_match(dev);
3105                         idx = 1;
3106                 } else {
3107                         idx = 0;
3108                         em_num = 0;
3109                 }
3110
3111                 if (netdev_mc_empty(dev))
3112                         return;
3113
3114                 /* Parse the list, and set the appropriate bits */
3115                 netdev_for_each_mc_addr(ha, dev) {
3116                         if (idx < em_num) {
3117                                 gfar_set_mac_for_addr(dev, idx, ha->addr);
3118                                 idx++;
3119                         } else
3120                                 gfar_set_hash_for_addr(dev, ha->addr);
3121                 }
3122         }
3123 }
3124
3125
3126 /* Clears each of the exact match registers to zero, so they
3127  * don't interfere with normal reception */
3128 static void gfar_clear_exact_match(struct net_device *dev)
3129 {
3130         int idx;
3131         static const u8 zero_arr[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
3132
3133         for(idx = 1;idx < GFAR_EM_NUM + 1;idx++)
3134                 gfar_set_mac_for_addr(dev, idx, zero_arr);
3135 }
3136
3137 /* Set the appropriate hash bit for the given addr */
3138 /* The algorithm works like so:
3139  * 1) Take the Destination Address (ie the multicast address), and
3140  * do a CRC on it (little endian), and reverse the bits of the
3141  * result.
3142  * 2) Use the 8 most significant bits as a hash into a 256-entry
3143  * table.  The table is controlled through 8 32-bit registers:
3144  * gaddr0-7.  gaddr0's MSB is entry 0, and gaddr7's LSB is
3145  * gaddr7.  This means that the 3 most significant bits in the
3146  * hash index which gaddr register to use, and the 5 other bits
3147  * indicate which bit (assuming an IBM numbering scheme, which
3148  * for PowerPC (tm) is usually the case) in the register holds
3149  * the entry. */
3150 static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
3151 {
3152         u32 tempval;
3153         struct gfar_private *priv = netdev_priv(dev);
3154         u32 result = ether_crc(ETH_ALEN, addr);
3155         int width = priv->hash_width;
3156         u8 whichbit = (result >> (32 - width)) & 0x1f;
3157         u8 whichreg = result >> (32 - width + 5);
3158         u32 value = (1 << (31-whichbit));
3159
3160         tempval = gfar_read(priv->hash_regs[whichreg]);
3161         tempval |= value;
3162         gfar_write(priv->hash_regs[whichreg], tempval);
3163 }
3164
3165
3166 /* There are multiple MAC Address register pairs on some controllers
3167  * This function sets the numth pair to a given address
3168  */
3169 static void gfar_set_mac_for_addr(struct net_device *dev, int num,
3170                                   const u8 *addr)
3171 {
3172         struct gfar_private *priv = netdev_priv(dev);
3173         struct gfar __iomem *regs = priv->gfargrp[0].regs;
3174         int idx;
3175         char tmpbuf[ETH_ALEN];
3176         u32 tempval;
3177         u32 __iomem *macptr = &regs->macstnaddr1;
3178
3179         macptr += num*2;
3180
3181         /* Now copy it into the mac registers backwards, cuz */
3182         /* little endian is silly */
3183         for (idx = 0; idx < ETH_ALEN; idx++)
3184                 tmpbuf[ETH_ALEN - 1 - idx] = addr[idx];
3185
3186         gfar_write(macptr, *((u32 *) (tmpbuf)));
3187
3188         tempval = *((u32 *) (tmpbuf + 4));
3189
3190         gfar_write(macptr+1, tempval);
3191 }
3192
3193 /* GFAR error interrupt handler */
3194 static irqreturn_t gfar_error(int irq, void *grp_id)
3195 {
3196         struct gfar_priv_grp *gfargrp = grp_id;
3197         struct gfar __iomem *regs = gfargrp->regs;
3198         struct gfar_private *priv= gfargrp->priv;
3199         struct net_device *dev = priv->ndev;
3200
3201         /* Save ievent for future reference */
3202         u32 events = gfar_read(&regs->ievent);
3203
3204         /* Clear IEVENT */
3205         gfar_write(&regs->ievent, events & IEVENT_ERR_MASK);
3206
3207         /* Magic Packet is not an error. */
3208         if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
3209             (events & IEVENT_MAG))
3210                 events &= ~IEVENT_MAG;
3211
3212         /* Hmm... */
3213         if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv))
3214                 netdev_dbg(dev, "error interrupt (ievent=0x%08x imask=0x%08x)\n",
3215                            events, gfar_read(&regs->imask));
3216
3217         /* Update the error counters */
3218         if (events & IEVENT_TXE) {
3219                 dev->stats.tx_errors++;
3220
3221                 if (events & IEVENT_LC)
3222                         dev->stats.tx_window_errors++;
3223                 if (events & IEVENT_CRL)
3224                         dev->stats.tx_aborted_errors++;
3225                 if (events & IEVENT_XFUN) {
3226                         unsigned long flags;
3227
3228                         netif_dbg(priv, tx_err, dev,
3229                                   "TX FIFO underrun, packet dropped\n");
3230                         dev->stats.tx_dropped++;
3231                         priv->extra_stats.tx_underrun++;
3232
3233                         local_irq_save(flags);
3234                         lock_tx_qs(priv);
3235
3236                         /* Reactivate the Tx Queues */
3237                         gfar_write(&regs->tstat, gfargrp->tstat);
3238
3239                         unlock_tx_qs(priv);
3240                         local_irq_restore(flags);
3241                 }
3242                 netif_dbg(priv, tx_err, dev, "Transmit Error\n");
3243         }
3244         if (events & IEVENT_BSY) {
3245                 dev->stats.rx_errors++;
3246                 priv->extra_stats.rx_bsy++;
3247
3248                 gfar_receive(irq, grp_id);
3249
3250                 netif_dbg(priv, rx_err, dev, "busy error (rstat: %x)\n",
3251                           gfar_read(&regs->rstat));
3252         }
3253         if (events & IEVENT_BABR) {
3254                 dev->stats.rx_errors++;
3255                 priv->extra_stats.rx_babr++;
3256
3257                 netif_dbg(priv, rx_err, dev, "babbling RX error\n");
3258         }
3259         if (events & IEVENT_EBERR) {
3260                 priv->extra_stats.eberr++;
3261                 netif_dbg(priv, rx_err, dev, "bus error\n");
3262         }
3263         if (events & IEVENT_RXC)
3264                 netif_dbg(priv, rx_status, dev, "control frame\n");
3265
3266         if (events & IEVENT_BABT) {
3267                 priv->extra_stats.tx_babt++;
3268                 netif_dbg(priv, tx_err, dev, "babbling TX error\n");
3269         }
3270         return IRQ_HANDLED;
3271 }
3272
3273 static struct of_device_id gfar_match[] =
3274 {
3275         {
3276                 .type = "network",
3277                 .compatible = "gianfar",
3278         },
3279         {
3280                 .compatible = "fsl,etsec2",
3281         },
3282         {},
3283 };
3284 MODULE_DEVICE_TABLE(of, gfar_match);
3285
3286 /* Structure for a device driver */
3287 static struct platform_driver gfar_driver = {
3288         .driver = {
3289                 .name = "fsl-gianfar",
3290                 .owner = THIS_MODULE,
3291                 .pm = GFAR_PM_OPS,
3292                 .of_match_table = gfar_match,
3293         },
3294         .probe = gfar_probe,
3295         .remove = gfar_remove,
3296 };
3297
3298 module_platform_driver(gfar_driver);