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