drivers/net/ethernet/broadcom/bcm63xx_enet.c

   1 /*
   2  * Driver for BCM963xx builtin Ethernet mac
   3  *
   4  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20 #include <linux/init.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/module.h>
  23 #include <linux/clk.h>
  24 #include <linux/etherdevice.h>
  25 #include <linux/slab.h>
  26 #include <linux/delay.h>
  27 #include <linux/ethtool.h>
  28 #include <linux/crc32.h>
  29 #include <linux/err.h>
  30 #include <linux/dma-mapping.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/if_vlan.h>
  33
  34 #include <bcm63xx_dev_enet.h>
  35 #include "bcm63xx_enet.h"
  36
  37 static char bcm_enet_driver_name[] = "bcm63xx_enet";
  38 static char bcm_enet_driver_version[] = "1.0";
  39
  40 static int copybreak __read_mostly = 128;
  41 module_param(copybreak, int, 0);
  42 MODULE_PARM_DESC(copybreak, "Receive copy threshold");
  43
  44 /* io registers memory shared between all devices */
  45 static void __iomem *bcm_enet_shared_base[3];
  46
  47 /*
  48  * io helpers to access mac registers
  49  */
  50 static inline u32 enet_readl(struct bcm_enet_priv *priv, u32 off)
  51 {
  52         return bcm_readl(priv->base + off);
  53 }
  54
  55 static inline void enet_writel(struct bcm_enet_priv *priv,
  56                                u32 val, u32 off)
  57 {
  58         bcm_writel(val, priv->base + off);
  59 }
  60
  61 /*
  62  * io helpers to access switch registers
  63  */
  64 static inline u32 enetsw_readl(struct bcm_enet_priv *priv, u32 off)
  65 {
  66         return bcm_readl(priv->base + off);
  67 }
  68
  69 static inline void enetsw_writel(struct bcm_enet_priv *priv,
  70                                  u32 val, u32 off)
  71 {
  72         bcm_writel(val, priv->base + off);
  73 }
  74
  75 static inline u16 enetsw_readw(struct bcm_enet_priv *priv, u32 off)
  76 {
  77         return bcm_readw(priv->base + off);
  78 }
  79
  80 static inline void enetsw_writew(struct bcm_enet_priv *priv,
  81                                  u16 val, u32 off)
  82 {
  83         bcm_writew(val, priv->base + off);
  84 }
  85
  86 static inline u8 enetsw_readb(struct bcm_enet_priv *priv, u32 off)
  87 {
  88         return bcm_readb(priv->base + off);
  89 }
  90
  91 static inline void enetsw_writeb(struct bcm_enet_priv *priv,
  92                                  u8 val, u32 off)
  93 {
  94         bcm_writeb(val, priv->base + off);
  95 }
  96
  97
  98 /* io helpers to access shared registers */
  99 static inline u32 enet_dma_readl(struct bcm_enet_priv *priv, u32 off)
 100 {
 101         return bcm_readl(bcm_enet_shared_base[0] + off);
 102 }
 103
 104 static inline void enet_dma_writel(struct bcm_enet_priv *priv,
 105                                        u32 val, u32 off)
 106 {
 107         bcm_writel(val, bcm_enet_shared_base[0] + off);
 108 }
 109
 110 static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off, int chan)
 111 {
 112         return bcm_readl(bcm_enet_shared_base[1] +
 113                 bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
 114 }
 115
 116 static inline void enet_dmac_writel(struct bcm_enet_priv *priv,
 117                                        u32 val, u32 off, int chan)
 118 {
 119         bcm_writel(val, bcm_enet_shared_base[1] +
 120                 bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
 121 }
 122
 123 static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off, int chan)
 124 {
 125         return bcm_readl(bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
 126 }
 127
 128 static inline void enet_dmas_writel(struct bcm_enet_priv *priv,
 129                                        u32 val, u32 off, int chan)
 130 {
 131         bcm_writel(val, bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
 132 }
 133
 134 /*
 135  * write given data into mii register and wait for transfer to end
 136  * with timeout (average measured transfer time is 25us)
 137  */
 138 static int do_mdio_op(struct bcm_enet_priv *priv, unsigned int data)
 139 {
 140         int limit;
 141
 142         /* make sure mii interrupt status is cleared */
 143         enet_writel(priv, ENET_IR_MII, ENET_IR_REG);
 144
 145         enet_writel(priv, data, ENET_MIIDATA_REG);
 146         wmb();
 147
 148         /* busy wait on mii interrupt bit, with timeout */
 149         limit = 1000;
 150         do {
 151                 if (enet_readl(priv, ENET_IR_REG) & ENET_IR_MII)
 152                         break;
 153                 udelay(1);
 154         } while (limit-- > 0);
 155
 156         return (limit < 0) ? 1 : 0;
 157 }
 158
 159 /*
 160  * MII internal read callback
 161  */
 162 static int bcm_enet_mdio_read(struct bcm_enet_priv *priv, int mii_id,
 163                               int regnum)
 164 {
 165         u32 tmp, val;
 166
 167         tmp = regnum << ENET_MIIDATA_REG_SHIFT;
 168         tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
 169         tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
 170         tmp |= ENET_MIIDATA_OP_READ_MASK;
 171
 172         if (do_mdio_op(priv, tmp))
 173                 return -1;
 174
 175         val = enet_readl(priv, ENET_MIIDATA_REG);
 176         val &= 0xffff;
 177         return val;
 178 }
 179
 180 /*
 181  * MII internal write callback
 182  */
 183 static int bcm_enet_mdio_write(struct bcm_enet_priv *priv, int mii_id,
 184                                int regnum, u16 value)
 185 {
 186         u32 tmp;
 187
 188         tmp = (value & 0xffff) << ENET_MIIDATA_DATA_SHIFT;
 189         tmp |= 0x2 << ENET_MIIDATA_TA_SHIFT;
 190         tmp |= regnum << ENET_MIIDATA_REG_SHIFT;
 191         tmp |= mii_id << ENET_MIIDATA_PHYID_SHIFT;
 192         tmp |= ENET_MIIDATA_OP_WRITE_MASK;
 193
 194         (void)do_mdio_op(priv, tmp);
 195         return 0;
 196 }
 197
 198 /*
 199  * MII read callback from phylib
 200  */
 201 static int bcm_enet_mdio_read_phylib(struct mii_bus *bus, int mii_id,
 202                                      int regnum)
 203 {
 204         return bcm_enet_mdio_read(bus->priv, mii_id, regnum);
 205 }
 206
 207 /*
 208  * MII write callback from phylib
 209  */
 210 static int bcm_enet_mdio_write_phylib(struct mii_bus *bus, int mii_id,
 211                                       int regnum, u16 value)
 212 {
 213         return bcm_enet_mdio_write(bus->priv, mii_id, regnum, value);
 214 }
 215
 216 /*
 217  * MII read callback from mii core
 218  */
 219 static int bcm_enet_mdio_read_mii(struct net_device *dev, int mii_id,
 220                                   int regnum)
 221 {
 222         return bcm_enet_mdio_read(netdev_priv(dev), mii_id, regnum);
 223 }
 224
 225 /*
 226  * MII write callback from mii core
 227  */
 228 static void bcm_enet_mdio_write_mii(struct net_device *dev, int mii_id,
 229                                     int regnum, int value)
 230 {
 231         bcm_enet_mdio_write(netdev_priv(dev), mii_id, regnum, value);
 232 }
 233
 234 /*
 235  * refill rx queue
 236  */
 237 static int bcm_enet_refill_rx(struct net_device *dev)
 238 {
 239         struct bcm_enet_priv *priv;
 240
 241         priv = netdev_priv(dev);
 242
 243         while (priv->rx_desc_count < priv->rx_ring_size) {
 244                 struct bcm_enet_desc *desc;
 245                 struct sk_buff *skb;
 246                 dma_addr_t p;
 247                 int desc_idx;
 248                 u32 len_stat;
 249
 250                 desc_idx = priv->rx_dirty_desc;
 251                 desc = &priv->rx_desc_cpu[desc_idx];
 252
 253                 if (!priv->rx_skb[desc_idx]) {
 254                         skb = netdev_alloc_skb(dev, priv->rx_skb_size);
 255                         if (!skb)
 256                                 break;
 257                         priv->rx_skb[desc_idx] = skb;
 258                         p = dma_map_single(&priv->pdev->dev, skb->data,
 259                                            priv->rx_skb_size,
 260                                            DMA_FROM_DEVICE);
 261                         desc->address = p;
 262                 }
 263
 264                 len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
 265                 len_stat |= DMADESC_OWNER_MASK;
 266                 if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
 267                         len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
 268                         priv->rx_dirty_desc = 0;
 269                 } else {
 270                         priv->rx_dirty_desc++;
 271                 }
 272                 wmb();
 273                 desc->len_stat = len_stat;
 274
 275                 priv->rx_desc_count++;
 276
 277                 /* tell dma engine we allocated one buffer */
 278                 if (priv->dma_has_sram)
 279                         enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
 280                 else
 281                         enet_dmac_writel(priv, 1, ENETDMAC_BUFALLOC, priv->rx_chan);
 282         }
 283
 284         /* If rx ring is still empty, set a timer to try allocating
 285          * again at a later time. */
 286         if (priv->rx_desc_count == 0 && netif_running(dev)) {
 287                 dev_warn(&priv->pdev->dev, "unable to refill rx ring\n");
 288                 priv->rx_timeout.expires = jiffies + HZ;
 289                 add_timer(&priv->rx_timeout);
 290         }
 291
 292         return 0;
 293 }
 294
 295 /*
 296  * timer callback to defer refill rx queue in case we're OOM
 297  */
 298 static void bcm_enet_refill_rx_timer(unsigned long data)
 299 {
 300         struct net_device *dev;
 301         struct bcm_enet_priv *priv;
 302
 303         dev = (struct net_device *)data;
 304         priv = netdev_priv(dev);
 305
 306         spin_lock(&priv->rx_lock);
 307         bcm_enet_refill_rx((struct net_device *)data);
 308         spin_unlock(&priv->rx_lock);
 309 }
 310
 311 /*
 312  * extract packet from rx queue
 313  */
 314 static int bcm_enet_receive_queue(struct net_device *dev, int budget)
 315 {
 316         struct bcm_enet_priv *priv;
 317         struct device *kdev;
 318         int processed;
 319
 320         priv = netdev_priv(dev);
 321         kdev = &priv->pdev->dev;
 322         processed = 0;
 323
 324         /* don't scan ring further than number of refilled
 325          * descriptor */
 326         if (budget > priv->rx_desc_count)
 327                 budget = priv->rx_desc_count;
 328
 329         do {
 330                 struct bcm_enet_desc *desc;
 331                 struct sk_buff *skb;
 332                 int desc_idx;
 333                 u32 len_stat;
 334                 unsigned int len;
 335
 336                 desc_idx = priv->rx_curr_desc;
 337                 desc = &priv->rx_desc_cpu[desc_idx];
 338
 339                 /* make sure we actually read the descriptor status at
 340                  * each loop */
 341                 rmb();
 342
 343                 len_stat = desc->len_stat;
 344
 345                 /* break if dma ownership belongs to hw */
 346                 if (len_stat & DMADESC_OWNER_MASK)
 347                         break;
 348
 349                 processed++;
 350                 priv->rx_curr_desc++;
 351                 if (priv->rx_curr_desc == priv->rx_ring_size)
 352                         priv->rx_curr_desc = 0;
 353                 priv->rx_desc_count--;
 354
 355                 /* if the packet does not have start of packet _and_
 356                  * end of packet flag set, then just recycle it */
 357                 if ((len_stat & (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) !=
 358                         (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) {
 359                         dev->stats.rx_dropped++;
 360                         continue;
 361                 }
 362
 363                 /* recycle packet if it's marked as bad */
 364                 if (!priv->enet_is_sw &&
 365                     unlikely(len_stat & DMADESC_ERR_MASK)) {
 366                         dev->stats.rx_errors++;
 367
 368                         if (len_stat & DMADESC_OVSIZE_MASK)
 369                                 dev->stats.rx_length_errors++;
 370                         if (len_stat & DMADESC_CRC_MASK)
 371                                 dev->stats.rx_crc_errors++;
 372                         if (len_stat & DMADESC_UNDER_MASK)
 373                                 dev->stats.rx_frame_errors++;
 374                         if (len_stat & DMADESC_OV_MASK)
 375                                 dev->stats.rx_fifo_errors++;
 376                         continue;
 377                 }
 378
 379                 /* valid packet */
 380                 skb = priv->rx_skb[desc_idx];
 381                 len = (len_stat & DMADESC_LENGTH_MASK) >> DMADESC_LENGTH_SHIFT;
 382                 /* don't include FCS */
 383                 len -= 4;
 384
 385                 if (len < copybreak) {
 386                         struct sk_buff *nskb;
 387
 388                         nskb = napi_alloc_skb(&priv->napi, len);
 389                         if (!nskb) {
 390                                 /* forget packet, just rearm desc */
 391                                 dev->stats.rx_dropped++;
 392                                 continue;
 393                         }
 394
 395                         dma_sync_single_for_cpu(kdev, desc->address,
 396                                                 len, DMA_FROM_DEVICE);
 397                         memcpy(nskb->data, skb->data, len);
 398                         dma_sync_single_for_device(kdev, desc->address,
 399                                                    len, DMA_FROM_DEVICE);
 400                         skb = nskb;
 401                 } else {
 402                         dma_unmap_single(&priv->pdev->dev, desc->address,
 403                                          priv->rx_skb_size, DMA_FROM_DEVICE);
 404                         priv->rx_skb[desc_idx] = NULL;
 405                 }
 406
 407                 skb_put(skb, len);
 408                 skb->protocol = eth_type_trans(skb, dev);
 409                 dev->stats.rx_packets++;
 410                 dev->stats.rx_bytes += len;
 411                 netif_receive_skb(skb);
 412
 413         } while (--budget > 0);
 414
 415         if (processed || !priv->rx_desc_count) {
 416                 bcm_enet_refill_rx(dev);
 417
 418                 /* kick rx dma */
 419                 enet_dmac_writel(priv, priv->dma_chan_en_mask,
 420                                          ENETDMAC_CHANCFG, priv->rx_chan);
 421         }
 422
 423         return processed;
 424 }
 425
 426
 427 /*
 428  * try to or force reclaim of transmitted buffers
 429  */
 430 static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
 431 {
 432         struct bcm_enet_priv *priv;
 433         int released;
 434
 435         priv = netdev_priv(dev);
 436         released = 0;
 437
 438         while (priv->tx_desc_count < priv->tx_ring_size) {
 439                 struct bcm_enet_desc *desc;
 440                 struct sk_buff *skb;
 441
 442                 /* We run in a bh and fight against start_xmit, which
 443                  * is called with bh disabled  */
 444                 spin_lock(&priv->tx_lock);
 445
 446                 desc = &priv->tx_desc_cpu[priv->tx_dirty_desc];
 447
 448                 if (!force && (desc->len_stat & DMADESC_OWNER_MASK)) {
 449                         spin_unlock(&priv->tx_lock);
 450                         break;
 451                 }
 452
 453                 /* ensure other field of the descriptor were not read
 454                  * before we checked ownership */
 455                 rmb();
 456
 457                 skb = priv->tx_skb[priv->tx_dirty_desc];
 458                 priv->tx_skb[priv->tx_dirty_desc] = NULL;
 459                 dma_unmap_single(&priv->pdev->dev, desc->address, skb->len,
 460                                  DMA_TO_DEVICE);
 461
 462                 priv->tx_dirty_desc++;
 463                 if (priv->tx_dirty_desc == priv->tx_ring_size)
 464                         priv->tx_dirty_desc = 0;
 465                 priv->tx_desc_count++;
 466
 467                 spin_unlock(&priv->tx_lock);
 468
 469                 if (desc->len_stat & DMADESC_UNDER_MASK)
 470                         dev->stats.tx_errors++;
 471
 472                 dev_kfree_skb(skb);
 473                 released++;
 474         }
 475
 476         if (netif_queue_stopped(dev) && released)
 477                 netif_wake_queue(dev);
 478
 479         return released;
 480 }
 481
 482 /*
 483  * poll func, called by network core
 484  */
 485 static int bcm_enet_poll(struct napi_struct *napi, int budget)
 486 {
 487         struct bcm_enet_priv *priv;
 488         struct net_device *dev;
 489         int rx_work_done;
 490
 491         priv = container_of(napi, struct bcm_enet_priv, napi);
 492         dev = priv->net_dev;
 493
 494         /* ack interrupts */
 495         enet_dmac_writel(priv, priv->dma_chan_int_mask,
 496                          ENETDMAC_IR, priv->rx_chan);
 497         enet_dmac_writel(priv, priv->dma_chan_int_mask,
 498                          ENETDMAC_IR, priv->tx_chan);
 499
 500         /* reclaim sent skb */
 501         bcm_enet_tx_reclaim(dev, 0);
 502
 503         spin_lock(&priv->rx_lock);
 504         rx_work_done = bcm_enet_receive_queue(dev, budget);
 505         spin_unlock(&priv->rx_lock);
 506
 507         if (rx_work_done >= budget) {
 508                 /* rx queue is not yet empty/clean */
 509                 return rx_work_done;
 510         }
 511
 512         /* no more packet in rx/tx queue, remove device from poll
 513          * queue */
 514         napi_complete(napi);
 515
 516         /* restore rx/tx interrupt */
 517         enet_dmac_writel(priv, priv->dma_chan_int_mask,
 518                          ENETDMAC_IRMASK, priv->rx_chan);
 519         enet_dmac_writel(priv, priv->dma_chan_int_mask,
 520                          ENETDMAC_IRMASK, priv->tx_chan);
 521
 522         return rx_work_done;
 523 }
 524
 525 /*
 526  * mac interrupt handler
 527  */
 528 static irqreturn_t bcm_enet_isr_mac(int irq, void *dev_id)
 529 {
 530         struct net_device *dev;
 531         struct bcm_enet_priv *priv;
 532         u32 stat;
 533
 534         dev = dev_id;
 535         priv = netdev_priv(dev);
 536
 537         stat = enet_readl(priv, ENET_IR_REG);
 538         if (!(stat & ENET_IR_MIB))
 539                 return IRQ_NONE;
 540
 541         /* clear & mask interrupt */
 542         enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
 543         enet_writel(priv, 0, ENET_IRMASK_REG);
 544
 545         /* read mib registers in workqueue */
 546         schedule_work(&priv->mib_update_task);
 547
 548         return IRQ_HANDLED;
 549 }
 550
 551 /*
 552  * rx/tx dma interrupt handler
 553  */
 554 static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
 555 {
 556         struct net_device *dev;
 557         struct bcm_enet_priv *priv;
 558
 559         dev = dev_id;
 560         priv = netdev_priv(dev);
 561
 562         /* mask rx/tx interrupts */
 563         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
 564         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
 565
 566         napi_schedule(&priv->napi);
 567
 568         return IRQ_HANDLED;
 569 }
 570
 571 /*
 572  * tx request callback
 573  */
 574 static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 575 {
 576         struct bcm_enet_priv *priv;
 577         struct bcm_enet_desc *desc;
 578         u32 len_stat;
 579         int ret;
 580
 581         priv = netdev_priv(dev);
 582
 583         /* lock against tx reclaim */
 584         spin_lock(&priv->tx_lock);
 585
 586         /* make sure  the tx hw queue  is not full,  should not happen
 587          * since we stop queue before it's the case */
 588         if (unlikely(!priv->tx_desc_count)) {
 589                 netif_stop_queue(dev);
 590                 dev_err(&priv->pdev->dev, "xmit called with no tx desc "
 591                         "available?\n");
 592                 ret = NETDEV_TX_BUSY;
 593                 goto out_unlock;
 594         }
 595
 596         /* pad small packets sent on a switch device */
 597         if (priv->enet_is_sw && skb->len < 64) {
 598                 int needed = 64 - skb->len;
 599                 char *data;
 600
 601                 if (unlikely(skb_tailroom(skb) < needed)) {
 602                         struct sk_buff *nskb;
 603
 604                         nskb = skb_copy_expand(skb, 0, needed, GFP_ATOMIC);
 605                         if (!nskb) {
 606                                 ret = NETDEV_TX_BUSY;
 607                                 goto out_unlock;
 608                         }
 609                         dev_kfree_skb(skb);
 610                         skb = nskb;
 611                 }
 612                 data = skb_put(skb, needed);
 613                 memset(data, 0, needed);
 614         }
 615
 616         /* point to the next available desc */
 617         desc = &priv->tx_desc_cpu[priv->tx_curr_desc];
 618         priv->tx_skb[priv->tx_curr_desc] = skb;
 619
 620         /* fill descriptor */
 621         desc->address = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
 622                                        DMA_TO_DEVICE);
 623
 624         len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
 625         len_stat |= (DMADESC_ESOP_MASK >> priv->dma_desc_shift) |
 626                 DMADESC_APPEND_CRC |
 627                 DMADESC_OWNER_MASK;
 628
 629         priv->tx_curr_desc++;
 630         if (priv->tx_curr_desc == priv->tx_ring_size) {
 631                 priv->tx_curr_desc = 0;
 632                 len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
 633         }
 634         priv->tx_desc_count--;
 635
 636         /* dma might be already polling, make sure we update desc
 637          * fields in correct order */
 638         wmb();
 639         desc->len_stat = len_stat;
 640         wmb();
 641
 642         /* kick tx dma */
 643         enet_dmac_writel(priv, priv->dma_chan_en_mask,
 644                                  ENETDMAC_CHANCFG, priv->tx_chan);
 645
 646         /* stop queue if no more desc available */
 647         if (!priv->tx_desc_count)
 648                 netif_stop_queue(dev);
 649
 650         dev->stats.tx_bytes += skb->len;
 651         dev->stats.tx_packets++;
 652         ret = NETDEV_TX_OK;
 653
 654 out_unlock:
 655         spin_unlock(&priv->tx_lock);
 656         return ret;
 657 }
 658
 659 /*
 660  * Change the interface's mac address.
 661  */
 662 static int bcm_enet_set_mac_address(struct net_device *dev, void *p)
 663 {
 664         struct bcm_enet_priv *priv;
 665         struct sockaddr *addr = p;
 666         u32 val;
 667
 668         priv = netdev_priv(dev);
 669         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
 670
 671         /* use perfect match register 0 to store my mac address */
 672         val = (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
 673                 (dev->dev_addr[4] << 8) | dev->dev_addr[5];
 674         enet_writel(priv, val, ENET_PML_REG(0));
 675
 676         val = (dev->dev_addr[0] << 8 | dev->dev_addr[1]);
 677         val |= ENET_PMH_DATAVALID_MASK;
 678         enet_writel(priv, val, ENET_PMH_REG(0));
 679
 680         return 0;
 681 }
 682
 683 /*
 684  * Change rx mode (promiscuous/allmulti) and update multicast list
 685  */
 686 static void bcm_enet_set_multicast_list(struct net_device *dev)
 687 {
 688         struct bcm_enet_priv *priv;
 689         struct netdev_hw_addr *ha;
 690         u32 val;
 691         int i;
 692
 693         priv = netdev_priv(dev);
 694
 695         val = enet_readl(priv, ENET_RXCFG_REG);
 696
 697         if (dev->flags & IFF_PROMISC)
 698                 val |= ENET_RXCFG_PROMISC_MASK;
 699         else
 700                 val &= ~ENET_RXCFG_PROMISC_MASK;
 701
 702         /* only 3 perfect match registers left, first one is used for
 703          * own mac address */
 704         if ((dev->flags & IFF_ALLMULTI) || netdev_mc_count(dev) > 3)
 705                 val |= ENET_RXCFG_ALLMCAST_MASK;
 706         else
 707                 val &= ~ENET_RXCFG_ALLMCAST_MASK;
 708
 709         /* no need to set perfect match registers if we catch all
 710          * multicast */
 711         if (val & ENET_RXCFG_ALLMCAST_MASK) {
 712                 enet_writel(priv, val, ENET_RXCFG_REG);
 713                 return;
 714         }
 715
 716         i = 0;
 717         netdev_for_each_mc_addr(ha, dev) {
 718                 u8 *dmi_addr;
 719                 u32 tmp;
 720
 721                 if (i == 3)
 722                         break;
 723                 /* update perfect match registers */
 724                 dmi_addr = ha->addr;
 725                 tmp = (dmi_addr[2] << 24) | (dmi_addr[3] << 16) |
 726                         (dmi_addr[4] << 8) | dmi_addr[5];
 727                 enet_writel(priv, tmp, ENET_PML_REG(i + 1));
 728
 729                 tmp = (dmi_addr[0] << 8 | dmi_addr[1]);
 730                 tmp |= ENET_PMH_DATAVALID_MASK;
 731                 enet_writel(priv, tmp, ENET_PMH_REG(i++ + 1));
 732         }
 733
 734         for (; i < 3; i++) {
 735                 enet_writel(priv, 0, ENET_PML_REG(i + 1));
 736                 enet_writel(priv, 0, ENET_PMH_REG(i + 1));
 737         }
 738
 739         enet_writel(priv, val, ENET_RXCFG_REG);
 740 }
 741
 742 /*
 743  * set mac duplex parameters
 744  */
 745 static void bcm_enet_set_duplex(struct bcm_enet_priv *priv, int fullduplex)
 746 {
 747         u32 val;
 748
 749         val = enet_readl(priv, ENET_TXCTL_REG);
 750         if (fullduplex)
 751                 val |= ENET_TXCTL_FD_MASK;
 752         else
 753                 val &= ~ENET_TXCTL_FD_MASK;
 754         enet_writel(priv, val, ENET_TXCTL_REG);
 755 }
 756
 757 /*
 758  * set mac flow control parameters
 759  */
 760 static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
 761 {
 762         u32 val;
 763
 764         /* rx flow control (pause frame handling) */
 765         val = enet_readl(priv, ENET_RXCFG_REG);
 766         if (rx_en)
 767                 val |= ENET_RXCFG_ENFLOW_MASK;
 768         else
 769                 val &= ~ENET_RXCFG_ENFLOW_MASK;
 770         enet_writel(priv, val, ENET_RXCFG_REG);
 771
 772         if (!priv->dma_has_sram)
 773                 return;
 774
 775         /* tx flow control (pause frame generation) */
 776         val = enet_dma_readl(priv, ENETDMA_CFG_REG);
 777         if (tx_en)
 778                 val |= ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
 779         else
 780                 val &= ~ENETDMA_CFG_FLOWCH_MASK(priv->rx_chan);
 781         enet_dma_writel(priv, val, ENETDMA_CFG_REG);
 782 }
 783
 784 /*
 785  * link changed callback (from phylib)
 786  */
 787 static void bcm_enet_adjust_phy_link(struct net_device *dev)
 788 {
 789         struct bcm_enet_priv *priv;
 790         struct phy_device *phydev;
 791         int status_changed;
 792
 793         priv = netdev_priv(dev);
 794         phydev = priv->phydev;
 795         status_changed = 0;
 796
 797         if (priv->old_link != phydev->link) {
 798                 status_changed = 1;
 799                 priv->old_link = phydev->link;
 800         }
 801
 802         /* reflect duplex change in mac configuration */
 803         if (phydev->link && phydev->duplex != priv->old_duplex) {
 804                 bcm_enet_set_duplex(priv,
 805                                     (phydev->duplex == DUPLEX_FULL) ? 1 : 0);
 806                 status_changed = 1;
 807                 priv->old_duplex = phydev->duplex;
 808         }
 809
 810         /* enable flow control if remote advertise it (trust phylib to
 811          * check that duplex is full */
 812         if (phydev->link && phydev->pause != priv->old_pause) {
 813                 int rx_pause_en, tx_pause_en;
 814
 815                 if (phydev->pause) {
 816                         /* pause was advertised by lpa and us */
 817                         rx_pause_en = 1;
 818                         tx_pause_en = 1;
 819                 } else if (!priv->pause_auto) {
 820                         /* pause setting overrided by user */
 821                         rx_pause_en = priv->pause_rx;
 822                         tx_pause_en = priv->pause_tx;
 823                 } else {
 824                         rx_pause_en = 0;
 825                         tx_pause_en = 0;
 826                 }
 827
 828                 bcm_enet_set_flow(priv, rx_pause_en, tx_pause_en);
 829                 status_changed = 1;
 830                 priv->old_pause = phydev->pause;
 831         }
 832
 833         if (status_changed) {
 834                 pr_info("%s: link %s", dev->name, phydev->link ?
 835                         "UP" : "DOWN");
 836                 if (phydev->link)
 837                         pr_cont(" - %d/%s - flow control %s", phydev->speed,
 838                                DUPLEX_FULL == phydev->duplex ? "full" : "half",
 839                                phydev->pause == 1 ? "rx&tx" : "off");
 840
 841                 pr_cont("\n");
 842         }
 843 }
 844
 845 /*
 846  * link changed callback (if phylib is not used)
 847  */
 848 static void bcm_enet_adjust_link(struct net_device *dev)
 849 {
 850         struct bcm_enet_priv *priv;
 851
 852         priv = netdev_priv(dev);
 853         bcm_enet_set_duplex(priv, priv->force_duplex_full);
 854         bcm_enet_set_flow(priv, priv->pause_rx, priv->pause_tx);
 855         netif_carrier_on(dev);
 856
 857         pr_info("%s: link forced UP - %d/%s - flow control %s/%s\n",
 858                 dev->name,
 859                 priv->force_speed_100 ? 100 : 10,
 860                 priv->force_duplex_full ? "full" : "half",
 861                 priv->pause_rx ? "rx" : "off",
 862                 priv->pause_tx ? "tx" : "off");
 863 }
 864
 865 /*
 866  * open callback, allocate dma rings & buffers and start rx operation
 867  */
 868 static int bcm_enet_open(struct net_device *dev)
 869 {
 870         struct bcm_enet_priv *priv;
 871         struct sockaddr addr;
 872         struct device *kdev;
 873         struct phy_device *phydev;
 874         int i, ret;
 875         unsigned int size;
 876         char phy_id[MII_BUS_ID_SIZE + 3];
 877         void *p;
 878         u32 val;
 879
 880         priv = netdev_priv(dev);
 881         kdev = &priv->pdev->dev;
 882
 883         if (priv->has_phy) {
 884                 /* connect to PHY */
 885                 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
 886                          priv->mii_bus->id, priv->phy_id);
 887
 888                 phydev = phy_connect(dev, phy_id, bcm_enet_adjust_phy_link,
 889                                      PHY_INTERFACE_MODE_MII);
 890
 891                 if (IS_ERR(phydev)) {
 892                         dev_err(kdev, "could not attach to PHY\n");
 893                         return PTR_ERR(phydev);
 894                 }
 895
 896                 /* mask with MAC supported features */
 897                 phydev->supported &= (SUPPORTED_10baseT_Half |
 898                                       SUPPORTED_10baseT_Full |
 899                                       SUPPORTED_100baseT_Half |
 900                                       SUPPORTED_100baseT_Full |
 901                                       SUPPORTED_Autoneg |
 902                                       SUPPORTED_Pause |
 903                                       SUPPORTED_MII);
 904                 phydev->advertising = phydev->supported;
 905
 906                 if (priv->pause_auto && priv->pause_rx && priv->pause_tx)
 907                         phydev->advertising |= SUPPORTED_Pause;
 908                 else
 909                         phydev->advertising &= ~SUPPORTED_Pause;
 910
 911                 dev_info(kdev, "attached PHY at address %d [%s]\n",
 912                          phydev->addr, phydev->drv->name);
 913
 914                 priv->old_link = 0;
 915                 priv->old_duplex = -1;
 916                 priv->old_pause = -1;
 917                 priv->phydev = phydev;
 918         }
 919
 920         /* mask all interrupts and request them */
 921         enet_writel(priv, 0, ENET_IRMASK_REG);
 922         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
 923         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
 924
 925         ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
 926         if (ret)
 927                 goto out_phy_disconnect;
 928
 929         ret = request_irq(priv->irq_rx, bcm_enet_isr_dma, 0,
 930                           dev->name, dev);
 931         if (ret)
 932                 goto out_freeirq;
 933
 934         ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
 935                           0, dev->name, dev);
 936         if (ret)
 937                 goto out_freeirq_rx;
 938
 939         /* initialize perfect match registers */
 940         for (i = 0; i < 4; i++) {
 941                 enet_writel(priv, 0, ENET_PML_REG(i));
 942                 enet_writel(priv, 0, ENET_PMH_REG(i));
 943         }
 944
 945         /* write device mac address */
 946         memcpy(addr.sa_data, dev->dev_addr, ETH_ALEN);
 947         bcm_enet_set_mac_address(dev, &addr);
 948
 949         /* allocate rx dma ring */
 950         size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
 951         p = dma_zalloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
 952         if (!p) {
 953                 ret = -ENOMEM;
 954                 goto out_freeirq_tx;
 955         }
 956
 957         priv->rx_desc_alloc_size = size;
 958         priv->rx_desc_cpu = p;
 959
 960         /* allocate tx dma ring */
 961         size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
 962         p = dma_zalloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
 963         if (!p) {
 964                 ret = -ENOMEM;
 965                 goto out_free_rx_ring;
 966         }
 967
 968         priv->tx_desc_alloc_size = size;
 969         priv->tx_desc_cpu = p;
 970
 971         priv->tx_skb = kcalloc(priv->tx_ring_size, sizeof(struct sk_buff *),
 972                                GFP_KERNEL);
 973         if (!priv->tx_skb) {
 974                 ret = -ENOMEM;
 975                 goto out_free_tx_ring;
 976         }
 977
 978         priv->tx_desc_count = priv->tx_ring_size;
 979         priv->tx_dirty_desc = 0;
 980         priv->tx_curr_desc = 0;
 981         spin_lock_init(&priv->tx_lock);
 982
 983         /* init & fill rx ring with skbs */
 984         priv->rx_skb = kcalloc(priv->rx_ring_size, sizeof(struct sk_buff *),
 985                                GFP_KERNEL);
 986         if (!priv->rx_skb) {
 987                 ret = -ENOMEM;
 988                 goto out_free_tx_skb;
 989         }
 990
 991         priv->rx_desc_count = 0;
 992         priv->rx_dirty_desc = 0;
 993         priv->rx_curr_desc = 0;
 994
 995         /* initialize flow control buffer allocation */
 996         if (priv->dma_has_sram)
 997                 enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
 998                                 ENETDMA_BUFALLOC_REG(priv->rx_chan));
 999         else
1000                 enet_dmac_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
1001                                 ENETDMAC_BUFALLOC, priv->rx_chan);
1002
1003         if (bcm_enet_refill_rx(dev)) {
1004                 dev_err(kdev, "cannot allocate rx skb queue\n");
1005                 ret = -ENOMEM;
1006                 goto out;
1007         }
1008
1009         /* write rx & tx ring addresses */
1010         if (priv->dma_has_sram) {
1011                 enet_dmas_writel(priv, priv->rx_desc_dma,
1012                                  ENETDMAS_RSTART_REG, priv->rx_chan);
1013                 enet_dmas_writel(priv, priv->tx_desc_dma,
1014                          ENETDMAS_RSTART_REG, priv->tx_chan);
1015         } else {
1016                 enet_dmac_writel(priv, priv->rx_desc_dma,
1017                                 ENETDMAC_RSTART, priv->rx_chan);
1018                 enet_dmac_writel(priv, priv->tx_desc_dma,
1019                                 ENETDMAC_RSTART, priv->tx_chan);
1020         }
1021
1022         /* clear remaining state ram for rx & tx channel */
1023         if (priv->dma_has_sram) {
1024                 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
1025                 enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
1026                 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
1027                 enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
1028                 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
1029                 enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
1030         } else {
1031                 enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->rx_chan);
1032                 enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->tx_chan);
1033         }
1034
1035         /* set max rx/tx length */
1036         enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
1037         enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
1038
1039         /* set dma maximum burst len */
1040         enet_dmac_writel(priv, priv->dma_maxburst,
1041                          ENETDMAC_MAXBURST, priv->rx_chan);
1042         enet_dmac_writel(priv, priv->dma_maxburst,
1043                          ENETDMAC_MAXBURST, priv->tx_chan);
1044
1045         /* set correct transmit fifo watermark */
1046         enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
1047
1048         /* set flow control low/high threshold to 1/3 / 2/3 */
1049         if (priv->dma_has_sram) {
1050                 val = priv->rx_ring_size / 3;
1051                 enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
1052                 val = (priv->rx_ring_size * 2) / 3;
1053                 enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
1054         } else {
1055                 enet_dmac_writel(priv, 5, ENETDMAC_FC, priv->rx_chan);
1056                 enet_dmac_writel(priv, priv->rx_ring_size, ENETDMAC_LEN, priv->rx_chan);
1057                 enet_dmac_writel(priv, priv->tx_ring_size, ENETDMAC_LEN, priv->tx_chan);
1058         }
1059
1060         /* all set, enable mac and interrupts, start dma engine and
1061          * kick rx dma channel */
1062         wmb();
1063         val = enet_readl(priv, ENET_CTL_REG);
1064         val |= ENET_CTL_ENABLE_MASK;
1065         enet_writel(priv, val, ENET_CTL_REG);
1066         enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
1067         enet_dmac_writel(priv, priv->dma_chan_en_mask,
1068                          ENETDMAC_CHANCFG, priv->rx_chan);
1069
1070         /* watch "mib counters about to overflow" interrupt */
1071         enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
1072         enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1073
1074         /* watch "packet transferred" interrupt in rx and tx */
1075         enet_dmac_writel(priv, priv->dma_chan_int_mask,
1076                          ENETDMAC_IR, priv->rx_chan);
1077         enet_dmac_writel(priv, priv->dma_chan_int_mask,
1078                          ENETDMAC_IR, priv->tx_chan);
1079
1080         /* make sure we enable napi before rx interrupt  */
1081         napi_enable(&priv->napi);
1082
1083         enet_dmac_writel(priv, priv->dma_chan_int_mask,
1084                          ENETDMAC_IRMASK, priv->rx_chan);
1085         enet_dmac_writel(priv, priv->dma_chan_int_mask,
1086                          ENETDMAC_IRMASK, priv->tx_chan);
1087
1088         if (priv->has_phy)
1089                 phy_start(priv->phydev);
1090         else
1091                 bcm_enet_adjust_link(dev);
1092
1093         netif_start_queue(dev);
1094         return 0;
1095
1096 out:
1097         for (i = 0; i < priv->rx_ring_size; i++) {
1098                 struct bcm_enet_desc *desc;
1099
1100                 if (!priv->rx_skb[i])
1101                         continue;
1102
1103                 desc = &priv->rx_desc_cpu[i];
1104                 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1105                                  DMA_FROM_DEVICE);
1106                 kfree_skb(priv->rx_skb[i]);
1107         }
1108         kfree(priv->rx_skb);
1109
1110 out_free_tx_skb:
1111         kfree(priv->tx_skb);
1112
1113 out_free_tx_ring:
1114         dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1115                           priv->tx_desc_cpu, priv->tx_desc_dma);
1116
1117 out_free_rx_ring:
1118         dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1119                           priv->rx_desc_cpu, priv->rx_desc_dma);
1120
1121 out_freeirq_tx:
1122         free_irq(priv->irq_tx, dev);
1123
1124 out_freeirq_rx:
1125         free_irq(priv->irq_rx, dev);
1126
1127 out_freeirq:
1128         free_irq(dev->irq, dev);
1129
1130 out_phy_disconnect:
1131         phy_disconnect(priv->phydev);
1132
1133         return ret;
1134 }
1135
1136 /*
1137  * disable mac
1138  */
1139 static void bcm_enet_disable_mac(struct bcm_enet_priv *priv)
1140 {
1141         int limit;
1142         u32 val;
1143
1144         val = enet_readl(priv, ENET_CTL_REG);
1145         val |= ENET_CTL_DISABLE_MASK;
1146         enet_writel(priv, val, ENET_CTL_REG);
1147
1148         limit = 1000;
1149         do {
1150                 u32 val;
1151
1152                 val = enet_readl(priv, ENET_CTL_REG);
1153                 if (!(val & ENET_CTL_DISABLE_MASK))
1154                         break;
1155                 udelay(1);
1156         } while (limit--);
1157 }
1158
1159 /*
1160  * disable dma in given channel
1161  */
1162 static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
1163 {
1164         int limit;
1165
1166         enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG, chan);
1167
1168         limit = 1000;
1169         do {
1170                 u32 val;
1171
1172                 val = enet_dmac_readl(priv, ENETDMAC_CHANCFG, chan);
1173                 if (!(val & ENETDMAC_CHANCFG_EN_MASK))
1174                         break;
1175                 udelay(1);
1176         } while (limit--);
1177 }
1178
1179 /*
1180  * stop callback
1181  */
1182 static int bcm_enet_stop(struct net_device *dev)
1183 {
1184         struct bcm_enet_priv *priv;
1185         struct device *kdev;
1186         int i;
1187
1188         priv = netdev_priv(dev);
1189         kdev = &priv->pdev->dev;
1190
1191         netif_stop_queue(dev);
1192         napi_disable(&priv->napi);
1193         if (priv->has_phy)
1194                 phy_stop(priv->phydev);
1195         del_timer_sync(&priv->rx_timeout);
1196
1197         /* mask all interrupts */
1198         enet_writel(priv, 0, ENET_IRMASK_REG);
1199         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
1200         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
1201
1202         /* make sure no mib update is scheduled */
1203         cancel_work_sync(&priv->mib_update_task);
1204
1205         /* disable dma & mac */
1206         bcm_enet_disable_dma(priv, priv->tx_chan);
1207         bcm_enet_disable_dma(priv, priv->rx_chan);
1208         bcm_enet_disable_mac(priv);
1209
1210         /* force reclaim of all tx buffers */
1211         bcm_enet_tx_reclaim(dev, 1);
1212
1213         /* free the rx skb ring */
1214         for (i = 0; i < priv->rx_ring_size; i++) {
1215                 struct bcm_enet_desc *desc;
1216
1217                 if (!priv->rx_skb[i])
1218                         continue;
1219
1220                 desc = &priv->rx_desc_cpu[i];
1221                 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
1222                                  DMA_FROM_DEVICE);
1223                 kfree_skb(priv->rx_skb[i]);
1224         }
1225
1226         /* free remaining allocated memory */
1227         kfree(priv->rx_skb);
1228         kfree(priv->tx_skb);
1229         dma_free_coherent(kdev, priv->rx_desc_alloc_size,
1230                           priv->rx_desc_cpu, priv->rx_desc_dma);
1231         dma_free_coherent(kdev, priv->tx_desc_alloc_size,
1232                           priv->tx_desc_cpu, priv->tx_desc_dma);
1233         free_irq(priv->irq_tx, dev);
1234         free_irq(priv->irq_rx, dev);
1235         free_irq(dev->irq, dev);
1236
1237         /* release phy */
1238         if (priv->has_phy) {
1239                 phy_disconnect(priv->phydev);
1240                 priv->phydev = NULL;
1241         }
1242
1243         return 0;
1244 }
1245
1246 /*
1247  * ethtool callbacks
1248  */
1249 struct bcm_enet_stats {
1250         char stat_string[ETH_GSTRING_LEN];
1251         int sizeof_stat;
1252         int stat_offset;
1253         int mib_reg;
1254 };
1255
1256 #define GEN_STAT(m) sizeof(((struct bcm_enet_priv *)0)->m),             \
1257                      offsetof(struct bcm_enet_priv, m)
1258 #define DEV_STAT(m) sizeof(((struct net_device_stats *)0)->m),          \
1259                      offsetof(struct net_device_stats, m)
1260
1261 static const struct bcm_enet_stats bcm_enet_gstrings_stats[] = {
1262         { "rx_packets", DEV_STAT(rx_packets), -1 },
1263         { "tx_packets", DEV_STAT(tx_packets), -1 },
1264         { "rx_bytes", DEV_STAT(rx_bytes), -1 },
1265         { "tx_bytes", DEV_STAT(tx_bytes), -1 },
1266         { "rx_errors", DEV_STAT(rx_errors), -1 },
1267         { "tx_errors", DEV_STAT(tx_errors), -1 },
1268         { "rx_dropped", DEV_STAT(rx_dropped), -1 },
1269         { "tx_dropped", DEV_STAT(tx_dropped), -1 },
1270
1271         { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETH_MIB_RX_GD_OCTETS},
1272         { "rx_good_pkts", GEN_STAT(mib.rx_gd_pkts), ETH_MIB_RX_GD_PKTS },
1273         { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETH_MIB_RX_BRDCAST },
1274         { "rx_multicast", GEN_STAT(mib.rx_mult), ETH_MIB_RX_MULT },
1275         { "rx_64_octets", GEN_STAT(mib.rx_64), ETH_MIB_RX_64 },
1276         { "rx_65_127_oct", GEN_STAT(mib.rx_65_127), ETH_MIB_RX_65_127 },
1277         { "rx_128_255_oct", GEN_STAT(mib.rx_128_255), ETH_MIB_RX_128_255 },
1278         { "rx_256_511_oct", GEN_STAT(mib.rx_256_511), ETH_MIB_RX_256_511 },
1279         { "rx_512_1023_oct", GEN_STAT(mib.rx_512_1023), ETH_MIB_RX_512_1023 },
1280         { "rx_1024_max_oct", GEN_STAT(mib.rx_1024_max), ETH_MIB_RX_1024_MAX },
1281         { "rx_jabber", GEN_STAT(mib.rx_jab), ETH_MIB_RX_JAB },
1282         { "rx_oversize", GEN_STAT(mib.rx_ovr), ETH_MIB_RX_OVR },
1283         { "rx_fragment", GEN_STAT(mib.rx_frag), ETH_MIB_RX_FRAG },
1284         { "rx_dropped", GEN_STAT(mib.rx_drop), ETH_MIB_RX_DROP },
1285         { "rx_crc_align", GEN_STAT(mib.rx_crc_align), ETH_MIB_RX_CRC_ALIGN },
1286         { "rx_undersize", GEN_STAT(mib.rx_und), ETH_MIB_RX_UND },
1287         { "rx_crc", GEN_STAT(mib.rx_crc), ETH_MIB_RX_CRC },
1288         { "rx_align", GEN_STAT(mib.rx_align), ETH_MIB_RX_ALIGN },
1289         { "rx_symbol_error", GEN_STAT(mib.rx_sym), ETH_MIB_RX_SYM },
1290         { "rx_pause", GEN_STAT(mib.rx_pause), ETH_MIB_RX_PAUSE },
1291         { "rx_control", GEN_STAT(mib.rx_cntrl), ETH_MIB_RX_CNTRL },
1292
1293         { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETH_MIB_TX_GD_OCTETS },
1294         { "tx_good_pkts", GEN_STAT(mib.tx_gd_pkts), ETH_MIB_TX_GD_PKTS },
1295         { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETH_MIB_TX_BRDCAST },
1296         { "tx_multicast", GEN_STAT(mib.tx_mult), ETH_MIB_TX_MULT },
1297         { "tx_64_oct", GEN_STAT(mib.tx_64), ETH_MIB_TX_64 },
1298         { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETH_MIB_TX_65_127 },
1299         { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETH_MIB_TX_128_255 },
1300         { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETH_MIB_TX_256_511 },
1301         { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETH_MIB_TX_512_1023},
1302         { "tx_1024_max_oct", GEN_STAT(mib.tx_1024_max), ETH_MIB_TX_1024_MAX },
1303         { "tx_jabber", GEN_STAT(mib.tx_jab), ETH_MIB_TX_JAB },
1304         { "tx_oversize", GEN_STAT(mib.tx_ovr), ETH_MIB_TX_OVR },
1305         { "tx_fragment", GEN_STAT(mib.tx_frag), ETH_MIB_TX_FRAG },
1306         { "tx_underrun", GEN_STAT(mib.tx_underrun), ETH_MIB_TX_UNDERRUN },
1307         { "tx_collisions", GEN_STAT(mib.tx_col), ETH_MIB_TX_COL },
1308         { "tx_single_collision", GEN_STAT(mib.tx_1_col), ETH_MIB_TX_1_COL },
1309         { "tx_multiple_collision", GEN_STAT(mib.tx_m_col), ETH_MIB_TX_M_COL },
1310         { "tx_excess_collision", GEN_STAT(mib.tx_ex_col), ETH_MIB_TX_EX_COL },
1311         { "tx_late_collision", GEN_STAT(mib.tx_late), ETH_MIB_TX_LATE },
1312         { "tx_deferred", GEN_STAT(mib.tx_def), ETH_MIB_TX_DEF },
1313         { "tx_carrier_sense", GEN_STAT(mib.tx_crs), ETH_MIB_TX_CRS },
1314         { "tx_pause", GEN_STAT(mib.tx_pause), ETH_MIB_TX_PAUSE },
1315
1316 };
1317
1318 #define BCM_ENET_STATS_LEN      ARRAY_SIZE(bcm_enet_gstrings_stats)
1319
1320 static const u32 unused_mib_regs[] = {
1321         ETH_MIB_TX_ALL_OCTETS,
1322         ETH_MIB_TX_ALL_PKTS,
1323         ETH_MIB_RX_ALL_OCTETS,
1324         ETH_MIB_RX_ALL_PKTS,
1325 };
1326
1327
1328 static void bcm_enet_get_drvinfo(struct net_device *netdev,
1329                                  struct ethtool_drvinfo *drvinfo)
1330 {
1331         strlcpy(drvinfo->driver, bcm_enet_driver_name, sizeof(drvinfo->driver));
1332         strlcpy(drvinfo->version, bcm_enet_driver_version,
1333                 sizeof(drvinfo->version));
1334         strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
1335         strlcpy(drvinfo->bus_info, "bcm63xx", sizeof(drvinfo->bus_info));
1336 }
1337
1338 static int bcm_enet_get_sset_count(struct net_device *netdev,
1339                                         int string_set)
1340 {
1341         switch (string_set) {
1342         case ETH_SS_STATS:
1343                 return BCM_ENET_STATS_LEN;
1344         default:
1345                 return -EINVAL;
1346         }
1347 }
1348
1349 static void bcm_enet_get_strings(struct net_device *netdev,
1350                                  u32 stringset, u8 *data)
1351 {
1352         int i;
1353
1354         switch (stringset) {
1355         case ETH_SS_STATS:
1356                 for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1357                         memcpy(data + i * ETH_GSTRING_LEN,
1358                                bcm_enet_gstrings_stats[i].stat_string,
1359                                ETH_GSTRING_LEN);
1360                 }
1361                 break;
1362         }
1363 }
1364
1365 static void update_mib_counters(struct bcm_enet_priv *priv)
1366 {
1367         int i;
1368
1369         for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1370                 const struct bcm_enet_stats *s;
1371                 u32 val;
1372                 char *p;
1373
1374                 s = &bcm_enet_gstrings_stats[i];
1375                 if (s->mib_reg == -1)
1376                         continue;
1377
1378                 val = enet_readl(priv, ENET_MIB_REG(s->mib_reg));
1379                 p = (char *)priv + s->stat_offset;
1380
1381                 if (s->sizeof_stat == sizeof(u64))
1382                         *(u64 *)p += val;
1383                 else
1384                         *(u32 *)p += val;
1385         }
1386
1387         /* also empty unused mib counters to make sure mib counter
1388          * overflow interrupt is cleared */
1389         for (i = 0; i < ARRAY_SIZE(unused_mib_regs); i++)
1390                 (void)enet_readl(priv, ENET_MIB_REG(unused_mib_regs[i]));
1391 }
1392
1393 static void bcm_enet_update_mib_counters_defer(struct work_struct *t)
1394 {
1395         struct bcm_enet_priv *priv;
1396
1397         priv = container_of(t, struct bcm_enet_priv, mib_update_task);
1398         mutex_lock(&priv->mib_update_lock);
1399         update_mib_counters(priv);
1400         mutex_unlock(&priv->mib_update_lock);
1401
1402         /* reenable mib interrupt */
1403         if (netif_running(priv->net_dev))
1404                 enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
1405 }
1406
1407 static void bcm_enet_get_ethtool_stats(struct net_device *netdev,
1408                                        struct ethtool_stats *stats,
1409                                        u64 *data)
1410 {
1411         struct bcm_enet_priv *priv;
1412         int i;
1413
1414         priv = netdev_priv(netdev);
1415
1416         mutex_lock(&priv->mib_update_lock);
1417         update_mib_counters(priv);
1418
1419         for (i = 0; i < BCM_ENET_STATS_LEN; i++) {
1420                 const struct bcm_enet_stats *s;
1421                 char *p;
1422
1423                 s = &bcm_enet_gstrings_stats[i];
1424                 if (s->mib_reg == -1)
1425                         p = (char *)&netdev->stats;
1426                 else
1427                         p = (char *)priv;
1428                 p += s->stat_offset;
1429                 data[i] = (s->sizeof_stat == sizeof(u64)) ?
1430                         *(u64 *)p : *(u32 *)p;
1431         }
1432         mutex_unlock(&priv->mib_update_lock);
1433 }
1434
1435 static int bcm_enet_nway_reset(struct net_device *dev)
1436 {
1437         struct bcm_enet_priv *priv;
1438
1439         priv = netdev_priv(dev);
1440         if (priv->has_phy) {
1441                 if (!priv->phydev)
1442                         return -ENODEV;
1443                 return genphy_restart_aneg(priv->phydev);
1444         }
1445
1446         return -EOPNOTSUPP;
1447 }
1448
1449 static int bcm_enet_get_settings(struct net_device *dev,
1450                                  struct ethtool_cmd *cmd)
1451 {
1452         struct bcm_enet_priv *priv;
1453
1454         priv = netdev_priv(dev);
1455
1456         cmd->maxrxpkt = 0;
1457         cmd->maxtxpkt = 0;
1458
1459         if (priv->has_phy) {
1460                 if (!priv->phydev)
1461                         return -ENODEV;
1462                 return phy_ethtool_gset(priv->phydev, cmd);
1463         } else {
1464                 cmd->autoneg = 0;
1465                 ethtool_cmd_speed_set(cmd, ((priv->force_speed_100)
1466                                             ? SPEED_100 : SPEED_10));
1467                 cmd->duplex = (priv->force_duplex_full) ?
1468                         DUPLEX_FULL : DUPLEX_HALF;
1469                 cmd->supported = ADVERTISED_10baseT_Half  |
1470                         ADVERTISED_10baseT_Full |
1471                         ADVERTISED_100baseT_Half |
1472                         ADVERTISED_100baseT_Full;
1473                 cmd->advertising = 0;
1474                 cmd->port = PORT_MII;
1475                 cmd->transceiver = XCVR_EXTERNAL;
1476         }
1477         return 0;
1478 }
1479
1480 static int bcm_enet_set_settings(struct net_device *dev,
1481                                  struct ethtool_cmd *cmd)
1482 {
1483         struct bcm_enet_priv *priv;
1484
1485         priv = netdev_priv(dev);
1486         if (priv->has_phy) {
1487                 if (!priv->phydev)
1488                         return -ENODEV;
1489                 return phy_ethtool_sset(priv->phydev, cmd);
1490         } else {
1491
1492                 if (cmd->autoneg ||
1493                     (cmd->speed != SPEED_100 && cmd->speed != SPEED_10) ||
1494                     cmd->port != PORT_MII)
1495                         return -EINVAL;
1496
1497                 priv->force_speed_100 = (cmd->speed == SPEED_100) ? 1 : 0;
1498                 priv->force_duplex_full = (cmd->duplex == DUPLEX_FULL) ? 1 : 0;
1499
1500                 if (netif_running(dev))
1501                         bcm_enet_adjust_link(dev);
1502                 return 0;
1503         }
1504 }
1505
1506 static void bcm_enet_get_ringparam(struct net_device *dev,
1507                                    struct ethtool_ringparam *ering)
1508 {
1509         struct bcm_enet_priv *priv;
1510
1511         priv = netdev_priv(dev);
1512
1513         /* rx/tx ring is actually only limited by memory */
1514         ering->rx_max_pending = 8192;
1515         ering->tx_max_pending = 8192;
1516         ering->rx_pending = priv->rx_ring_size;
1517         ering->tx_pending = priv->tx_ring_size;
1518 }
1519
1520 static int bcm_enet_set_ringparam(struct net_device *dev,
1521                                   struct ethtool_ringparam *ering)
1522 {
1523         struct bcm_enet_priv *priv;
1524         int was_running;
1525
1526         priv = netdev_priv(dev);
1527
1528         was_running = 0;
1529         if (netif_running(dev)) {
1530                 bcm_enet_stop(dev);
1531                 was_running = 1;
1532         }
1533
1534         priv->rx_ring_size = ering->rx_pending;
1535         priv->tx_ring_size = ering->tx_pending;
1536
1537         if (was_running) {
1538                 int err;
1539
1540                 err = bcm_enet_open(dev);
1541                 if (err)
1542                         dev_close(dev);
1543                 else
1544                         bcm_enet_set_multicast_list(dev);
1545         }
1546         return 0;
1547 }
1548
1549 static void bcm_enet_get_pauseparam(struct net_device *dev,
1550                                     struct ethtool_pauseparam *ecmd)
1551 {
1552         struct bcm_enet_priv *priv;
1553
1554         priv = netdev_priv(dev);
1555         ecmd->autoneg = priv->pause_auto;
1556         ecmd->rx_pause = priv->pause_rx;
1557         ecmd->tx_pause = priv->pause_tx;
1558 }
1559
1560 static int bcm_enet_set_pauseparam(struct net_device *dev,
1561                                    struct ethtool_pauseparam *ecmd)
1562 {
1563         struct bcm_enet_priv *priv;
1564
1565         priv = netdev_priv(dev);
1566
1567         if (priv->has_phy) {
1568                 if (ecmd->autoneg && (ecmd->rx_pause != ecmd->tx_pause)) {
1569                         /* asymetric pause mode not supported,
1570                          * actually possible but integrated PHY has RO
1571                          * asym_pause bit */
1572                         return -EINVAL;
1573                 }
1574         } else {
1575                 /* no pause autoneg on direct mii connection */
1576                 if (ecmd->autoneg)
1577                         return -EINVAL;
1578         }
1579
1580         priv->pause_auto = ecmd->autoneg;
1581         priv->pause_rx = ecmd->rx_pause;
1582         priv->pause_tx = ecmd->tx_pause;
1583
1584         return 0;
1585 }
1586
1587 static const struct ethtool_ops bcm_enet_ethtool_ops = {
1588         .get_strings            = bcm_enet_get_strings,
1589         .get_sset_count         = bcm_enet_get_sset_count,
1590         .get_ethtool_stats      = bcm_enet_get_ethtool_stats,
1591         .nway_reset             = bcm_enet_nway_reset,
1592         .get_settings           = bcm_enet_get_settings,
1593         .set_settings           = bcm_enet_set_settings,
1594         .get_drvinfo            = bcm_enet_get_drvinfo,
1595         .get_link               = ethtool_op_get_link,
1596         .get_ringparam          = bcm_enet_get_ringparam,
1597         .set_ringparam          = bcm_enet_set_ringparam,
1598         .get_pauseparam         = bcm_enet_get_pauseparam,
1599         .set_pauseparam         = bcm_enet_set_pauseparam,
1600 };
1601
1602 static int bcm_enet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1603 {
1604         struct bcm_enet_priv *priv;
1605
1606         priv = netdev_priv(dev);
1607         if (priv->has_phy) {
1608                 if (!priv->phydev)
1609                         return -ENODEV;
1610                 return phy_mii_ioctl(priv->phydev, rq, cmd);
1611         } else {
1612                 struct mii_if_info mii;
1613
1614                 mii.dev = dev;
1615                 mii.mdio_read = bcm_enet_mdio_read_mii;
1616                 mii.mdio_write = bcm_enet_mdio_write_mii;
1617                 mii.phy_id = 0;
1618                 mii.phy_id_mask = 0x3f;
1619                 mii.reg_num_mask = 0x1f;
1620                 return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
1621         }
1622 }
1623
1624 /*
1625  * calculate actual hardware mtu
1626  */
1627 static int compute_hw_mtu(struct bcm_enet_priv *priv, int mtu)
1628 {
1629         int actual_mtu;
1630
1631         actual_mtu = mtu;
1632
1633         /* add ethernet header + vlan tag size */
1634         actual_mtu += VLAN_ETH_HLEN;
1635
1636         if (actual_mtu < 64 || actual_mtu > BCMENET_MAX_MTU)
1637                 return -EINVAL;
1638
1639         /*
1640          * setup maximum size before we get overflow mark in
1641          * descriptor, note that this will not prevent reception of
1642          * big frames, they will be split into multiple buffers
1643          * anyway
1644          */
1645         priv->hw_mtu = actual_mtu;
1646
1647         /*
1648          * align rx buffer size to dma burst len, account FCS since
1649          * it's appended
1650          */
1651         priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
1652                                   priv->dma_maxburst * 4);
1653         return 0;
1654 }
1655
1656 /*
1657  * adjust mtu, can't be called while device is running
1658  */
1659 static int bcm_enet_change_mtu(struct net_device *dev, int new_mtu)
1660 {
1661         int ret;
1662
1663         if (netif_running(dev))
1664                 return -EBUSY;
1665
1666         ret = compute_hw_mtu(netdev_priv(dev), new_mtu);
1667         if (ret)
1668                 return ret;
1669         dev->mtu = new_mtu;
1670         return 0;
1671 }
1672
1673 /*
1674  * preinit hardware to allow mii operation while device is down
1675  */
1676 static void bcm_enet_hw_preinit(struct bcm_enet_priv *priv)
1677 {
1678         u32 val;
1679         int limit;
1680
1681         /* make sure mac is disabled */
1682         bcm_enet_disable_mac(priv);
1683
1684         /* soft reset mac */
1685         val = ENET_CTL_SRESET_MASK;
1686         enet_writel(priv, val, ENET_CTL_REG);
1687         wmb();
1688
1689         limit = 1000;
1690         do {
1691                 val = enet_readl(priv, ENET_CTL_REG);
1692                 if (!(val & ENET_CTL_SRESET_MASK))
1693                         break;
1694                 udelay(1);
1695         } while (limit--);
1696
1697         /* select correct mii interface */
1698         val = enet_readl(priv, ENET_CTL_REG);
1699         if (priv->use_external_mii)
1700                 val |= ENET_CTL_EPHYSEL_MASK;
1701         else
1702                 val &= ~ENET_CTL_EPHYSEL_MASK;
1703         enet_writel(priv, val, ENET_CTL_REG);
1704
1705         /* turn on mdc clock */
1706         enet_writel(priv, (0x1f << ENET_MIISC_MDCFREQDIV_SHIFT) |
1707                     ENET_MIISC_PREAMBLEEN_MASK, ENET_MIISC_REG);
1708
1709         /* set mib counters to self-clear when read */
1710         val = enet_readl(priv, ENET_MIBCTL_REG);
1711         val |= ENET_MIBCTL_RDCLEAR_MASK;
1712         enet_writel(priv, val, ENET_MIBCTL_REG);
1713 }
1714
1715 static const struct net_device_ops bcm_enet_ops = {
1716         .ndo_open               = bcm_enet_open,
1717         .ndo_stop               = bcm_enet_stop,
1718         .ndo_start_xmit         = bcm_enet_start_xmit,
1719         .ndo_set_mac_address    = bcm_enet_set_mac_address,
1720         .ndo_set_rx_mode        = bcm_enet_set_multicast_list,
1721         .ndo_do_ioctl           = bcm_enet_ioctl,
1722         .ndo_change_mtu         = bcm_enet_change_mtu,
1723 };
1724
1725 /*
1726  * allocate netdevice, request register memory and register device.
1727  */
1728 static int bcm_enet_probe(struct platform_device *pdev)
1729 {
1730         struct bcm_enet_priv *priv;
1731         struct net_device *dev;
1732         struct bcm63xx_enet_platform_data *pd;
1733         struct resource *res_mem, *res_irq, *res_irq_rx, *res_irq_tx;
1734         struct mii_bus *bus;
1735         const char *clk_name;
1736         int i, ret;
1737
1738         /* stop if shared driver failed, assume driver->probe will be
1739          * called in the same order we register devices (correct ?) */
1740         if (!bcm_enet_shared_base[0])
1741                 return -ENODEV;
1742
1743         res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1744         res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
1745         res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
1746         if (!res_irq || !res_irq_rx || !res_irq_tx)
1747                 return -ENODEV;
1748
1749         ret = 0;
1750         dev = alloc_etherdev(sizeof(*priv));
1751         if (!dev)
1752                 return -ENOMEM;
1753         priv = netdev_priv(dev);
1754
1755         priv->enet_is_sw = false;
1756         priv->dma_maxburst = BCMENET_DMA_MAXBURST;
1757
1758         ret = compute_hw_mtu(priv, dev->mtu);
1759         if (ret)
1760                 goto out;
1761
1762         res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1763         priv->base = devm_ioremap_resource(&pdev->dev, res_mem);
1764         if (IS_ERR(priv->base)) {
1765                 ret = PTR_ERR(priv->base);
1766                 goto out;
1767         }
1768
1769         dev->irq = priv->irq = res_irq->start;
1770         priv->irq_rx = res_irq_rx->start;
1771         priv->irq_tx = res_irq_tx->start;
1772         priv->mac_id = pdev->id;
1773
1774         /* get rx & tx dma channel id for this mac */
1775         if (priv->mac_id == 0) {
1776                 priv->rx_chan = 0;
1777                 priv->tx_chan = 1;
1778                 clk_name = "enet0";
1779         } else {
1780                 priv->rx_chan = 2;
1781                 priv->tx_chan = 3;
1782                 clk_name = "enet1";
1783         }
1784
1785         priv->mac_clk = clk_get(&pdev->dev, clk_name);
1786         if (IS_ERR(priv->mac_clk)) {
1787                 ret = PTR_ERR(priv->mac_clk);
1788                 goto out;
1789         }
1790         clk_prepare_enable(priv->mac_clk);
1791
1792         /* initialize default and fetch platform data */
1793         priv->rx_ring_size = BCMENET_DEF_RX_DESC;
1794         priv->tx_ring_size = BCMENET_DEF_TX_DESC;
1795
1796         pd = dev_get_platdata(&pdev->dev);
1797         if (pd) {
1798                 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
1799                 priv->has_phy = pd->has_phy;
1800                 priv->phy_id = pd->phy_id;
1801                 priv->has_phy_interrupt = pd->has_phy_interrupt;
1802                 priv->phy_interrupt = pd->phy_interrupt;
1803                 priv->use_external_mii = !pd->use_internal_phy;
1804                 priv->pause_auto = pd->pause_auto;
1805                 priv->pause_rx = pd->pause_rx;
1806                 priv->pause_tx = pd->pause_tx;
1807                 priv->force_duplex_full = pd->force_duplex_full;
1808                 priv->force_speed_100 = pd->force_speed_100;
1809                 priv->dma_chan_en_mask = pd->dma_chan_en_mask;
1810                 priv->dma_chan_int_mask = pd->dma_chan_int_mask;
1811                 priv->dma_chan_width = pd->dma_chan_width;
1812                 priv->dma_has_sram = pd->dma_has_sram;
1813                 priv->dma_desc_shift = pd->dma_desc_shift;
1814         }
1815
1816         if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
1817                 /* using internal PHY, enable clock */
1818                 priv->phy_clk = clk_get(&pdev->dev, "ephy");
1819                 if (IS_ERR(priv->phy_clk)) {
1820                         ret = PTR_ERR(priv->phy_clk);
1821                         priv->phy_clk = NULL;
1822                         goto out_put_clk_mac;
1823                 }
1824                 clk_prepare_enable(priv->phy_clk);
1825         }
1826
1827         /* do minimal hardware init to be able to probe mii bus */
1828         bcm_enet_hw_preinit(priv);
1829
1830         /* MII bus registration */
1831         if (priv->has_phy) {
1832
1833                 priv->mii_bus = mdiobus_alloc();
1834                 if (!priv->mii_bus) {
1835                         ret = -ENOMEM;
1836                         goto out_uninit_hw;
1837                 }
1838
1839                 bus = priv->mii_bus;
1840                 bus->name = "bcm63xx_enet MII bus";
1841                 bus->parent = &pdev->dev;
1842                 bus->priv = priv;
1843                 bus->read = bcm_enet_mdio_read_phylib;
1844                 bus->write = bcm_enet_mdio_write_phylib;
1845                 sprintf(bus->id, "%s-%d", pdev->name, priv->mac_id);
1846
1847                 /* only probe bus where we think the PHY is, because
1848                  * the mdio read operation return 0 instead of 0xffff
1849                  * if a slave is not present on hw */
1850                 bus->phy_mask = ~(1 << priv->phy_id);
1851
1852                 bus->irq = devm_kzalloc(&pdev->dev, sizeof(int) * PHY_MAX_ADDR,
1853                                         GFP_KERNEL);
1854                 if (!bus->irq) {
1855                         ret = -ENOMEM;
1856                         goto out_free_mdio;
1857                 }
1858
1859                 if (priv->has_phy_interrupt)
1860                         bus->irq[priv->phy_id] = priv->phy_interrupt;
1861                 else
1862                         bus->irq[priv->phy_id] = PHY_POLL;
1863
1864                 ret = mdiobus_register(bus);
1865                 if (ret) {
1866                         dev_err(&pdev->dev, "unable to register mdio bus\n");
1867                         goto out_free_mdio;
1868                 }
1869         } else {
1870
1871                 /* run platform code to initialize PHY device */
1872                 if (pd->mii_config &&
1873                     pd->mii_config(dev, 1, bcm_enet_mdio_read_mii,
1874                                    bcm_enet_mdio_write_mii)) {
1875                         dev_err(&pdev->dev, "unable to configure mdio bus\n");
1876                         goto out_uninit_hw;
1877                 }
1878         }
1879
1880         spin_lock_init(&priv->rx_lock);
1881
1882         /* init rx timeout (used for oom) */
1883         init_timer(&priv->rx_timeout);
1884         priv->rx_timeout.function = bcm_enet_refill_rx_timer;
1885         priv->rx_timeout.data = (unsigned long)dev;
1886
1887         /* init the mib update lock&work */
1888         mutex_init(&priv->mib_update_lock);
1889         INIT_WORK(&priv->mib_update_task, bcm_enet_update_mib_counters_defer);
1890
1891         /* zero mib counters */
1892         for (i = 0; i < ENET_MIB_REG_COUNT; i++)
1893                 enet_writel(priv, 0, ENET_MIB_REG(i));
1894
1895         /* register netdevice */
1896         dev->netdev_ops = &bcm_enet_ops;
1897         netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
1898
1899         dev->ethtool_ops = &bcm_enet_ethtool_ops;
1900         SET_NETDEV_DEV(dev, &pdev->dev);
1901
1902         ret = register_netdev(dev);
1903         if (ret)
1904                 goto out_unregister_mdio;
1905
1906         netif_carrier_off(dev);
1907         platform_set_drvdata(pdev, dev);
1908         priv->pdev = pdev;
1909         priv->net_dev = dev;
1910
1911         return 0;
1912
1913 out_unregister_mdio:
1914         if (priv->mii_bus)
1915                 mdiobus_unregister(priv->mii_bus);
1916
1917 out_free_mdio:
1918         if (priv->mii_bus)
1919                 mdiobus_free(priv->mii_bus);
1920
1921 out_uninit_hw:
1922         /* turn off mdc clock */
1923         enet_writel(priv, 0, ENET_MIISC_REG);
1924         if (priv->phy_clk) {
1925                 clk_disable_unprepare(priv->phy_clk);
1926                 clk_put(priv->phy_clk);
1927         }
1928
1929 out_put_clk_mac:
1930         clk_disable_unprepare(priv->mac_clk);
1931         clk_put(priv->mac_clk);
1932 out:
1933         free_netdev(dev);
1934         return ret;
1935 }
1936
1937
1938 /*
1939  * exit func, stops hardware and unregisters netdevice
1940  */
1941 static int bcm_enet_remove(struct platform_device *pdev)
1942 {
1943         struct bcm_enet_priv *priv;
1944         struct net_device *dev;
1945
1946         /* stop netdevice */
1947         dev = platform_get_drvdata(pdev);
1948         priv = netdev_priv(dev);
1949         unregister_netdev(dev);
1950
1951         /* turn off mdc clock */
1952         enet_writel(priv, 0, ENET_MIISC_REG);
1953
1954         if (priv->has_phy) {
1955                 mdiobus_unregister(priv->mii_bus);
1956                 mdiobus_free(priv->mii_bus);
1957         } else {
1958                 struct bcm63xx_enet_platform_data *pd;
1959
1960                 pd = dev_get_platdata(&pdev->dev);
1961                 if (pd && pd->mii_config)
1962                         pd->mii_config(dev, 0, bcm_enet_mdio_read_mii,
1963                                        bcm_enet_mdio_write_mii);
1964         }
1965
1966         /* disable hw block clocks */
1967         if (priv->phy_clk) {
1968                 clk_disable_unprepare(priv->phy_clk);
1969                 clk_put(priv->phy_clk);
1970         }
1971         clk_disable_unprepare(priv->mac_clk);
1972         clk_put(priv->mac_clk);
1973
1974         free_netdev(dev);
1975         return 0;
1976 }
1977
1978 struct platform_driver bcm63xx_enet_driver = {
1979         .probe  = bcm_enet_probe,
1980         .remove = bcm_enet_remove,
1981         .driver = {
1982                 .name   = "bcm63xx_enet",
1983                 .owner  = THIS_MODULE,
1984         },
1985 };
1986
1987 /*
1988  * switch mii access callbacks
1989  */
1990 static int bcmenet_sw_mdio_read(struct bcm_enet_priv *priv,
1991                                 int ext, int phy_id, int location)
1992 {
1993         u32 reg;
1994         int ret;
1995
1996         spin_lock_bh(&priv->enetsw_mdio_lock);
1997         enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
1998
1999         reg = ENETSW_MDIOC_RD_MASK |
2000                 (phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
2001                 (location << ENETSW_MDIOC_REG_SHIFT);
2002
2003         if (ext)
2004                 reg |= ENETSW_MDIOC_EXT_MASK;
2005
2006         enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
2007         udelay(50);
2008         ret = enetsw_readw(priv, ENETSW_MDIOD_REG);
2009         spin_unlock_bh(&priv->enetsw_mdio_lock);
2010         return ret;
2011 }
2012
2013 static void bcmenet_sw_mdio_write(struct bcm_enet_priv *priv,
2014                                  int ext, int phy_id, int location,
2015                                  uint16_t data)
2016 {
2017         u32 reg;
2018
2019         spin_lock_bh(&priv->enetsw_mdio_lock);
2020         enetsw_writel(priv, 0, ENETSW_MDIOC_REG);
2021
2022         reg = ENETSW_MDIOC_WR_MASK |
2023                 (phy_id << ENETSW_MDIOC_PHYID_SHIFT) |
2024                 (location << ENETSW_MDIOC_REG_SHIFT);
2025
2026         if (ext)
2027                 reg |= ENETSW_MDIOC_EXT_MASK;
2028
2029         reg |= data;
2030
2031         enetsw_writel(priv, reg, ENETSW_MDIOC_REG);
2032         udelay(50);
2033         spin_unlock_bh(&priv->enetsw_mdio_lock);
2034 }
2035
2036 static inline int bcm_enet_port_is_rgmii(int portid)
2037 {
2038         return portid >= ENETSW_RGMII_PORT0;
2039 }
2040
2041 /*
2042  * enet sw PHY polling
2043  */
2044 static void swphy_poll_timer(unsigned long data)
2045 {
2046         struct bcm_enet_priv *priv = (struct bcm_enet_priv *)data;
2047         unsigned int i;
2048
2049         for (i = 0; i < priv->num_ports; i++) {
2050                 struct bcm63xx_enetsw_port *port;
2051                 int val, j, up, advertise, lpa, speed, duplex, media;
2052                 int external_phy = bcm_enet_port_is_rgmii(i);
2053                 u8 override;
2054
2055                 port = &priv->used_ports[i];
2056                 if (!port->used)
2057                         continue;
2058
2059                 if (port->bypass_link)
2060                         continue;
2061
2062                 /* dummy read to clear */
2063                 for (j = 0; j < 2; j++)
2064                         val = bcmenet_sw_mdio_read(priv, external_phy,
2065                                                    port->phy_id, MII_BMSR);
2066
2067                 if (val == 0xffff)
2068                         continue;
2069
2070                 up = (val & BMSR_LSTATUS) ? 1 : 0;
2071                 if (!(up ^ priv->sw_port_link[i]))
2072                         continue;
2073
2074                 priv->sw_port_link[i] = up;
2075
2076                 /* link changed */
2077                 if (!up) {
2078                         dev_info(&priv->pdev->dev, "link DOWN on %s\n",
2079                                  port->name);
2080                         enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
2081                                       ENETSW_PORTOV_REG(i));
2082                         enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
2083                                       ENETSW_PTCTRL_TXDIS_MASK,
2084                                       ENETSW_PTCTRL_REG(i));
2085                         continue;
2086                 }
2087
2088                 advertise = bcmenet_sw_mdio_read(priv, external_phy,
2089                                                  port->phy_id, MII_ADVERTISE);
2090
2091                 lpa = bcmenet_sw_mdio_read(priv, external_phy, port->phy_id,
2092                                            MII_LPA);
2093
2094                 /* figure out media and duplex from advertise and LPA values */
2095                 media = mii_nway_result(lpa & advertise);
2096                 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
2097
2098                 if (media & (ADVERTISE_100FULL | ADVERTISE_100HALF))
2099                         speed = 100;
2100                 else
2101                         speed = 10;
2102
2103                 if (val & BMSR_ESTATEN) {
2104                         advertise = bcmenet_sw_mdio_read(priv, external_phy,
2105                                                 port->phy_id, MII_CTRL1000);
2106
2107                         lpa = bcmenet_sw_mdio_read(priv, external_phy,
2108                                                 port->phy_id, MII_STAT1000);
2109
2110                         if (advertise & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)
2111                                         && lpa & (LPA_1000FULL | LPA_1000HALF)) {
2112                                 speed = 1000;
2113                                 duplex = (lpa & LPA_1000FULL);
2114                         }
2115                 }
2116
2117                 dev_info(&priv->pdev->dev,
2118                          "link UP on %s, %dMbps, %s-duplex\n",
2119                          port->name, speed, duplex ? "full" : "half");
2120
2121                 override = ENETSW_PORTOV_ENABLE_MASK |
2122                         ENETSW_PORTOV_LINKUP_MASK;
2123
2124                 if (speed == 1000)
2125                         override |= ENETSW_IMPOV_1000_MASK;
2126                 else if (speed == 100)
2127                         override |= ENETSW_IMPOV_100_MASK;
2128                 if (duplex)
2129                         override |= ENETSW_IMPOV_FDX_MASK;
2130
2131                 enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
2132                 enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
2133         }
2134
2135         priv->swphy_poll.expires = jiffies + HZ;
2136         add_timer(&priv->swphy_poll);
2137 }
2138
2139 /*
2140  * open callback, allocate dma rings & buffers and start rx operation
2141  */
2142 static int bcm_enetsw_open(struct net_device *dev)
2143 {
2144         struct bcm_enet_priv *priv;
2145         struct device *kdev;
2146         int i, ret;
2147         unsigned int size;
2148         void *p;
2149         u32 val;
2150
2151         priv = netdev_priv(dev);
2152         kdev = &priv->pdev->dev;
2153
2154         /* mask all interrupts and request them */
2155         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
2156         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
2157
2158         ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
2159                           0, dev->name, dev);
2160         if (ret)
2161                 goto out_freeirq;
2162
2163         if (priv->irq_tx != -1) {
2164                 ret = request_irq(priv->irq_tx, bcm_enet_isr_dma,
2165                                   0, dev->name, dev);
2166                 if (ret)
2167                         goto out_freeirq_rx;
2168         }
2169
2170         /* allocate rx dma ring */
2171         size = priv->rx_ring_size * sizeof(struct bcm_enet_desc);
2172         p = dma_alloc_coherent(kdev, size, &priv->rx_desc_dma, GFP_KERNEL);
2173         if (!p) {
2174                 dev_err(kdev, "cannot allocate rx ring %u\n", size);
2175                 ret = -ENOMEM;
2176                 goto out_freeirq_tx;
2177         }
2178
2179         memset(p, 0, size);
2180         priv->rx_desc_alloc_size = size;
2181         priv->rx_desc_cpu = p;
2182
2183         /* allocate tx dma ring */
2184         size = priv->tx_ring_size * sizeof(struct bcm_enet_desc);
2185         p = dma_alloc_coherent(kdev, size, &priv->tx_desc_dma, GFP_KERNEL);
2186         if (!p) {
2187                 dev_err(kdev, "cannot allocate tx ring\n");
2188                 ret = -ENOMEM;
2189                 goto out_free_rx_ring;
2190         }
2191
2192         memset(p, 0, size);
2193         priv->tx_desc_alloc_size = size;
2194         priv->tx_desc_cpu = p;
2195
2196         priv->tx_skb = kzalloc(sizeof(struct sk_buff *) * priv->tx_ring_size,
2197                                GFP_KERNEL);
2198         if (!priv->tx_skb) {
2199                 dev_err(kdev, "cannot allocate rx skb queue\n");
2200                 ret = -ENOMEM;
2201                 goto out_free_tx_ring;
2202         }
2203
2204         priv->tx_desc_count = priv->tx_ring_size;
2205         priv->tx_dirty_desc = 0;
2206         priv->tx_curr_desc = 0;
2207         spin_lock_init(&priv->tx_lock);
2208
2209         /* init & fill rx ring with skbs */
2210         priv->rx_skb = kzalloc(sizeof(struct sk_buff *) * priv->rx_ring_size,
2211                                GFP_KERNEL);
2212         if (!priv->rx_skb) {
2213                 dev_err(kdev, "cannot allocate rx skb queue\n");
2214                 ret = -ENOMEM;
2215                 goto out_free_tx_skb;
2216         }
2217
2218         priv->rx_desc_count = 0;
2219         priv->rx_dirty_desc = 0;
2220         priv->rx_curr_desc = 0;
2221
2222         /* disable all ports */
2223         for (i = 0; i < priv->num_ports; i++) {
2224                 enetsw_writeb(priv, ENETSW_PORTOV_ENABLE_MASK,
2225                               ENETSW_PORTOV_REG(i));
2226                 enetsw_writeb(priv, ENETSW_PTCTRL_RXDIS_MASK |
2227                               ENETSW_PTCTRL_TXDIS_MASK,
2228                               ENETSW_PTCTRL_REG(i));
2229
2230                 priv->sw_port_link[i] = 0;
2231         }
2232
2233         /* reset mib */
2234         val = enetsw_readb(priv, ENETSW_GMCR_REG);
2235         val |= ENETSW_GMCR_RST_MIB_MASK;
2236         enetsw_writeb(priv, val, ENETSW_GMCR_REG);
2237         mdelay(1);
2238         val &= ~ENETSW_GMCR_RST_MIB_MASK;
2239         enetsw_writeb(priv, val, ENETSW_GMCR_REG);
2240         mdelay(1);
2241
2242         /* force CPU port state */
2243         val = enetsw_readb(priv, ENETSW_IMPOV_REG);
2244         val |= ENETSW_IMPOV_FORCE_MASK | ENETSW_IMPOV_LINKUP_MASK;
2245         enetsw_writeb(priv, val, ENETSW_IMPOV_REG);
2246
2247         /* enable switch forward engine */
2248         val = enetsw_readb(priv, ENETSW_SWMODE_REG);
2249         val |= ENETSW_SWMODE_FWD_EN_MASK;
2250         enetsw_writeb(priv, val, ENETSW_SWMODE_REG);
2251
2252         /* enable jumbo on all ports */
2253         enetsw_writel(priv, 0x1ff, ENETSW_JMBCTL_PORT_REG);
2254         enetsw_writew(priv, 9728, ENETSW_JMBCTL_MAXSIZE_REG);
2255
2256         /* initialize flow control buffer allocation */
2257         enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
2258                         ENETDMA_BUFALLOC_REG(priv->rx_chan));
2259
2260         if (bcm_enet_refill_rx(dev)) {
2261                 dev_err(kdev, "cannot allocate rx skb queue\n");
2262                 ret = -ENOMEM;
2263                 goto out;
2264         }
2265
2266         /* write rx & tx ring addresses */
2267         enet_dmas_writel(priv, priv->rx_desc_dma,
2268                          ENETDMAS_RSTART_REG, priv->rx_chan);
2269         enet_dmas_writel(priv, priv->tx_desc_dma,
2270                          ENETDMAS_RSTART_REG, priv->tx_chan);
2271
2272         /* clear remaining state ram for rx & tx channel */
2273         enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
2274         enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
2275         enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
2276         enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
2277         enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
2278         enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
2279
2280         /* set dma maximum burst len */
2281         enet_dmac_writel(priv, priv->dma_maxburst,
2282                          ENETDMAC_MAXBURST, priv->rx_chan);
2283         enet_dmac_writel(priv, priv->dma_maxburst,
2284                          ENETDMAC_MAXBURST, priv->tx_chan);
2285
2286         /* set flow control low/high threshold to 1/3 / 2/3 */
2287         val = priv->rx_ring_size / 3;
2288         enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
2289         val = (priv->rx_ring_size * 2) / 3;
2290         enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
2291
2292         /* all set, enable mac and interrupts, start dma engine and
2293          * kick rx dma channel
2294          */
2295         wmb();
2296         enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
2297         enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
2298                          ENETDMAC_CHANCFG, priv->rx_chan);
2299
2300         /* watch "packet transferred" interrupt in rx and tx */
2301         enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2302                          ENETDMAC_IR, priv->rx_chan);
2303         enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2304                          ENETDMAC_IR, priv->tx_chan);
2305
2306         /* make sure we enable napi before rx interrupt  */
2307         napi_enable(&priv->napi);
2308
2309         enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2310                          ENETDMAC_IRMASK, priv->rx_chan);
2311         enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
2312                          ENETDMAC_IRMASK, priv->tx_chan);
2313
2314         netif_carrier_on(dev);
2315         netif_start_queue(dev);
2316
2317         /* apply override config for bypass_link ports here. */
2318         for (i = 0; i < priv->num_ports; i++) {
2319                 struct bcm63xx_enetsw_port *port;
2320                 u8 override;
2321                 port = &priv->used_ports[i];
2322                 if (!port->used)
2323                         continue;
2324
2325                 if (!port->bypass_link)
2326                         continue;
2327
2328                 override = ENETSW_PORTOV_ENABLE_MASK |
2329                         ENETSW_PORTOV_LINKUP_MASK;
2330
2331                 switch (port->force_speed) {
2332                 case 1000:
2333                         override |= ENETSW_IMPOV_1000_MASK;
2334                         break;
2335                 case 100:
2336                         override |= ENETSW_IMPOV_100_MASK;
2337                         break;
2338                 case 10:
2339                         break;
2340                 default:
2341                         pr_warn("invalid forced speed on port %s: assume 10\n",
2342                                port->name);
2343                         break;
2344                 }
2345
2346                 if (port->force_duplex_full)
2347                         override |= ENETSW_IMPOV_FDX_MASK;
2348
2349
2350                 enetsw_writeb(priv, override, ENETSW_PORTOV_REG(i));
2351                 enetsw_writeb(priv, 0, ENETSW_PTCTRL_REG(i));
2352         }
2353
2354         /* start phy polling timer */
2355         init_timer(&priv->swphy_poll);
2356         priv->swphy_poll.function = swphy_poll_timer;
2357         priv->swphy_poll.data = (unsigned long)priv;
2358         priv->swphy_poll.expires = jiffies;
2359         add_timer(&priv->swphy_poll);
2360         return 0;
2361
2362 out:
2363         for (i = 0; i < priv->rx_ring_size; i++) {
2364                 struct bcm_enet_desc *desc;
2365
2366                 if (!priv->rx_skb[i])
2367                         continue;
2368
2369                 desc = &priv->rx_desc_cpu[i];
2370                 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
2371                                  DMA_FROM_DEVICE);
2372                 kfree_skb(priv->rx_skb[i]);
2373         }
2374         kfree(priv->rx_skb);
2375
2376 out_free_tx_skb:
2377         kfree(priv->tx_skb);
2378
2379 out_free_tx_ring:
2380         dma_free_coherent(kdev, priv->tx_desc_alloc_size,
2381                           priv->tx_desc_cpu, priv->tx_desc_dma);
2382
2383 out_free_rx_ring:
2384         dma_free_coherent(kdev, priv->rx_desc_alloc_size,
2385                           priv->rx_desc_cpu, priv->rx_desc_dma);
2386
2387 out_freeirq_tx:
2388         if (priv->irq_tx != -1)
2389                 free_irq(priv->irq_tx, dev);
2390
2391 out_freeirq_rx:
2392         free_irq(priv->irq_rx, dev);
2393
2394 out_freeirq:
2395         return ret;
2396 }
2397
2398 /* stop callback */
2399 static int bcm_enetsw_stop(struct net_device *dev)
2400 {
2401         struct bcm_enet_priv *priv;
2402         struct device *kdev;
2403         int i;
2404
2405         priv = netdev_priv(dev);
2406         kdev = &priv->pdev->dev;
2407
2408         del_timer_sync(&priv->swphy_poll);
2409         netif_stop_queue(dev);
2410         napi_disable(&priv->napi);
2411         del_timer_sync(&priv->rx_timeout);
2412
2413         /* mask all interrupts */
2414         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
2415         enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
2416
2417         /* disable dma & mac */
2418         bcm_enet_disable_dma(priv, priv->tx_chan);
2419         bcm_enet_disable_dma(priv, priv->rx_chan);
2420
2421         /* force reclaim of all tx buffers */
2422         bcm_enet_tx_reclaim(dev, 1);
2423
2424         /* free the rx skb ring */
2425         for (i = 0; i < priv->rx_ring_size; i++) {
2426                 struct bcm_enet_desc *desc;
2427
2428                 if (!priv->rx_skb[i])
2429                         continue;
2430
2431                 desc = &priv->rx_desc_cpu[i];
2432                 dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
2433                                  DMA_FROM_DEVICE);
2434                 kfree_skb(priv->rx_skb[i]);
2435         }
2436
2437         /* free remaining allocated memory */
2438         kfree(priv->rx_skb);
2439         kfree(priv->tx_skb);
2440         dma_free_coherent(kdev, priv->rx_desc_alloc_size,
2441                           priv->rx_desc_cpu, priv->rx_desc_dma);
2442         dma_free_coherent(kdev, priv->tx_desc_alloc_size,
2443                           priv->tx_desc_cpu, priv->tx_desc_dma);
2444         if (priv->irq_tx != -1)
2445                 free_irq(priv->irq_tx, dev);
2446         free_irq(priv->irq_rx, dev);
2447
2448         return 0;
2449 }
2450
2451 /* try to sort out phy external status by walking the used_port field
2452  * in the bcm_enet_priv structure. in case the phy address is not
2453  * assigned to any physical port on the switch, assume it is external
2454  * (and yell at the user).
2455  */
2456 static int bcm_enetsw_phy_is_external(struct bcm_enet_priv *priv, int phy_id)
2457 {
2458         int i;
2459
2460         for (i = 0; i < priv->num_ports; ++i) {
2461                 if (!priv->used_ports[i].used)
2462                         continue;
2463                 if (priv->used_ports[i].phy_id == phy_id)
2464                         return bcm_enet_port_is_rgmii(i);
2465         }
2466
2467         printk_once(KERN_WARNING  "bcm63xx_enet: could not find a used port with phy_id %i, assuming phy is external\n",
2468                     phy_id);
2469         return 1;
2470 }
2471
2472 /* can't use bcmenet_sw_mdio_read directly as we need to sort out
2473  * external/internal status of the given phy_id first.
2474  */
2475 static int bcm_enetsw_mii_mdio_read(struct net_device *dev, int phy_id,
2476                                     int location)
2477 {
2478         struct bcm_enet_priv *priv;
2479
2480         priv = netdev_priv(dev);
2481         return bcmenet_sw_mdio_read(priv,
2482                                     bcm_enetsw_phy_is_external(priv, phy_id),
2483                                     phy_id, location);
2484 }
2485
2486 /* can't use bcmenet_sw_mdio_write directly as we need to sort out
2487  * external/internal status of the given phy_id first.
2488  */
2489 static void bcm_enetsw_mii_mdio_write(struct net_device *dev, int phy_id,
2490                                       int location,
2491                                       int val)
2492 {
2493         struct bcm_enet_priv *priv;
2494
2495         priv = netdev_priv(dev);
2496         bcmenet_sw_mdio_write(priv, bcm_enetsw_phy_is_external(priv, phy_id),
2497                               phy_id, location, val);
2498 }
2499
2500 static int bcm_enetsw_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2501 {
2502         struct mii_if_info mii;
2503
2504         mii.dev = dev;
2505         mii.mdio_read = bcm_enetsw_mii_mdio_read;
2506         mii.mdio_write = bcm_enetsw_mii_mdio_write;
2507         mii.phy_id = 0;
2508         mii.phy_id_mask = 0x3f;
2509         mii.reg_num_mask = 0x1f;
2510         return generic_mii_ioctl(&mii, if_mii(rq), cmd, NULL);
2511
2512 }
2513
2514 static const struct net_device_ops bcm_enetsw_ops = {
2515         .ndo_open               = bcm_enetsw_open,
2516         .ndo_stop               = bcm_enetsw_stop,
2517         .ndo_start_xmit         = bcm_enet_start_xmit,
2518         .ndo_change_mtu         = bcm_enet_change_mtu,
2519         .ndo_do_ioctl           = bcm_enetsw_ioctl,
2520 };
2521
2522
2523 static const struct bcm_enet_stats bcm_enetsw_gstrings_stats[] = {
2524         { "rx_packets", DEV_STAT(rx_packets), -1 },
2525         { "tx_packets", DEV_STAT(tx_packets), -1 },
2526         { "rx_bytes", DEV_STAT(rx_bytes), -1 },
2527         { "tx_bytes", DEV_STAT(tx_bytes), -1 },
2528         { "rx_errors", DEV_STAT(rx_errors), -1 },
2529         { "tx_errors", DEV_STAT(tx_errors), -1 },
2530         { "rx_dropped", DEV_STAT(rx_dropped), -1 },
2531         { "tx_dropped", DEV_STAT(tx_dropped), -1 },
2532
2533         { "tx_good_octets", GEN_STAT(mib.tx_gd_octets), ETHSW_MIB_RX_GD_OCT },
2534         { "tx_unicast", GEN_STAT(mib.tx_unicast), ETHSW_MIB_RX_BRDCAST },
2535         { "tx_broadcast", GEN_STAT(mib.tx_brdcast), ETHSW_MIB_RX_BRDCAST },
2536         { "tx_multicast", GEN_STAT(mib.tx_mult), ETHSW_MIB_RX_MULT },
2537         { "tx_64_octets", GEN_STAT(mib.tx_64), ETHSW_MIB_RX_64 },
2538         { "tx_65_127_oct", GEN_STAT(mib.tx_65_127), ETHSW_MIB_RX_65_127 },
2539         { "tx_128_255_oct", GEN_STAT(mib.tx_128_255), ETHSW_MIB_RX_128_255 },
2540         { "tx_256_511_oct", GEN_STAT(mib.tx_256_511), ETHSW_MIB_RX_256_511 },
2541         { "tx_512_1023_oct", GEN_STAT(mib.tx_512_1023), ETHSW_MIB_RX_512_1023},
2542         { "tx_1024_1522_oct", GEN_STAT(mib.tx_1024_max),
2543           ETHSW_MIB_RX_1024_1522 },
2544         { "tx_1523_2047_oct", GEN_STAT(mib.tx_1523_2047),
2545           ETHSW_MIB_RX_1523_2047 },
2546         { "tx_2048_4095_oct", GEN_STAT(mib.tx_2048_4095),
2547           ETHSW_MIB_RX_2048_4095 },
2548         { "tx_4096_8191_oct", GEN_STAT(mib.tx_4096_8191),
2549           ETHSW_MIB_RX_4096_8191 },
2550         { "tx_8192_9728_oct", GEN_STAT(mib.tx_8192_9728),
2551           ETHSW_MIB_RX_8192_9728 },
2552         { "tx_oversize", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR },
2553         { "tx_oversize_drop", GEN_STAT(mib.tx_ovr), ETHSW_MIB_RX_OVR_DISC },
2554         { "tx_dropped", GEN_STAT(mib.tx_drop), ETHSW_MIB_RX_DROP },
2555         { "tx_undersize", GEN_STAT(mib.tx_underrun), ETHSW_MIB_RX_UND },
2556         { "tx_pause", GEN_STAT(mib.tx_pause), ETHSW_MIB_RX_PAUSE },
2557
2558         { "rx_good_octets", GEN_STAT(mib.rx_gd_octets), ETHSW_MIB_TX_ALL_OCT },
2559         { "rx_broadcast", GEN_STAT(mib.rx_brdcast), ETHSW_MIB_TX_BRDCAST },
2560         { "rx_multicast", GEN_STAT(mib.rx_mult), ETHSW_MIB_TX_MULT },
2561         { "rx_unicast", GEN_STAT(mib.rx_unicast), ETHSW_MIB_TX_MULT },
2562         { "rx_pause", GEN_STAT(mib.rx_pause), ETHSW_MIB_TX_PAUSE },
2563         { "rx_dropped", GEN_STAT(mib.rx_drop), ETHSW_MIB_TX_DROP_PKTS },
2564
2565 };
2566
2567 #define BCM_ENETSW_STATS_LEN    \
2568         (sizeof(bcm_enetsw_gstrings_stats) / sizeof(struct bcm_enet_stats))
2569
2570 static void bcm_enetsw_get_strings(struct net_device *netdev,
2571                                    u32 stringset, u8 *data)
2572 {
2573         int i;
2574
2575         switch (stringset) {
2576         case ETH_SS_STATS:
2577                 for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2578                         memcpy(data + i * ETH_GSTRING_LEN,
2579                                bcm_enetsw_gstrings_stats[i].stat_string,
2580                                ETH_GSTRING_LEN);
2581                 }
2582                 break;
2583         }
2584 }
2585
2586 static int bcm_enetsw_get_sset_count(struct net_device *netdev,
2587                                      int string_set)
2588 {
2589         switch (string_set) {
2590         case ETH_SS_STATS:
2591                 return BCM_ENETSW_STATS_LEN;
2592         default:
2593                 return -EINVAL;
2594         }
2595 }
2596
2597 static void bcm_enetsw_get_drvinfo(struct net_device *netdev,
2598                                    struct ethtool_drvinfo *drvinfo)
2599 {
2600         strncpy(drvinfo->driver, bcm_enet_driver_name, 32);
2601         strncpy(drvinfo->version, bcm_enet_driver_version, 32);
2602         strncpy(drvinfo->fw_version, "N/A", 32);
2603         strncpy(drvinfo->bus_info, "bcm63xx", 32);
2604 }
2605
2606 static void bcm_enetsw_get_ethtool_stats(struct net_device *netdev,
2607                                          struct ethtool_stats *stats,
2608                                          u64 *data)
2609 {
2610         struct bcm_enet_priv *priv;
2611         int i;
2612
2613         priv = netdev_priv(netdev);
2614
2615         for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2616                 const struct bcm_enet_stats *s;
2617                 u32 lo, hi;
2618                 char *p;
2619                 int reg;
2620
2621                 s = &bcm_enetsw_gstrings_stats[i];
2622
2623                 reg = s->mib_reg;
2624                 if (reg == -1)
2625                         continue;
2626
2627                 lo = enetsw_readl(priv, ENETSW_MIB_REG(reg));
2628                 p = (char *)priv + s->stat_offset;
2629
2630                 if (s->sizeof_stat == sizeof(u64)) {
2631                         hi = enetsw_readl(priv, ENETSW_MIB_REG(reg + 1));
2632                         *(u64 *)p = ((u64)hi << 32 | lo);
2633                 } else {
2634                         *(u32 *)p = lo;
2635                 }
2636         }
2637
2638         for (i = 0; i < BCM_ENETSW_STATS_LEN; i++) {
2639                 const struct bcm_enet_stats *s;
2640                 char *p;
2641
2642                 s = &bcm_enetsw_gstrings_stats[i];
2643
2644                 if (s->mib_reg == -1)
2645                         p = (char *)&netdev->stats + s->stat_offset;
2646                 else
2647                         p = (char *)priv + s->stat_offset;
2648
2649                 data[i] = (s->sizeof_stat == sizeof(u64)) ?
2650                         *(u64 *)p : *(u32 *)p;
2651         }
2652 }
2653
2654 static void bcm_enetsw_get_ringparam(struct net_device *dev,
2655                                      struct ethtool_ringparam *ering)
2656 {
2657         struct bcm_enet_priv *priv;
2658
2659         priv = netdev_priv(dev);
2660
2661         /* rx/tx ring is actually only limited by memory */
2662         ering->rx_max_pending = 8192;
2663         ering->tx_max_pending = 8192;
2664         ering->rx_mini_max_pending = 0;
2665         ering->rx_jumbo_max_pending = 0;
2666         ering->rx_pending = priv->rx_ring_size;
2667         ering->tx_pending = priv->tx_ring_size;
2668 }
2669
2670 static int bcm_enetsw_set_ringparam(struct net_device *dev,
2671                                     struct ethtool_ringparam *ering)
2672 {
2673         struct bcm_enet_priv *priv;
2674         int was_running;
2675
2676         priv = netdev_priv(dev);
2677
2678         was_running = 0;
2679         if (netif_running(dev)) {
2680                 bcm_enetsw_stop(dev);
2681                 was_running = 1;
2682         }
2683
2684         priv->rx_ring_size = ering->rx_pending;
2685         priv->tx_ring_size = ering->tx_pending;
2686
2687         if (was_running) {
2688                 int err;
2689
2690                 err = bcm_enetsw_open(dev);
2691                 if (err)
2692                         dev_close(dev);
2693         }
2694         return 0;
2695 }
2696
2697 static struct ethtool_ops bcm_enetsw_ethtool_ops = {
2698         .get_strings            = bcm_enetsw_get_strings,
2699         .get_sset_count         = bcm_enetsw_get_sset_count,
2700         .get_ethtool_stats      = bcm_enetsw_get_ethtool_stats,
2701         .get_drvinfo            = bcm_enetsw_get_drvinfo,
2702         .get_ringparam          = bcm_enetsw_get_ringparam,
2703         .set_ringparam          = bcm_enetsw_set_ringparam,
2704 };
2705
2706 /* allocate netdevice, request register memory and register device. */
2707 static int bcm_enetsw_probe(struct platform_device *pdev)
2708 {
2709         struct bcm_enet_priv *priv;
2710         struct net_device *dev;
2711         struct bcm63xx_enetsw_platform_data *pd;
2712         struct resource *res_mem;
2713         int ret, irq_rx, irq_tx;
2714
2715         /* stop if shared driver failed, assume driver->probe will be
2716          * called in the same order we register devices (correct ?)
2717          */
2718         if (!bcm_enet_shared_base[0])
2719                 return -ENODEV;
2720
2721         res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2722         irq_rx = platform_get_irq(pdev, 0);
2723         irq_tx = platform_get_irq(pdev, 1);
2724         if (!res_mem || irq_rx < 0)
2725                 return -ENODEV;
2726
2727         ret = 0;
2728         dev = alloc_etherdev(sizeof(*priv));
2729         if (!dev)
2730                 return -ENOMEM;
2731         priv = netdev_priv(dev);
2732         memset(priv, 0, sizeof(*priv));
2733
2734         /* initialize default and fetch platform data */
2735         priv->enet_is_sw = true;
2736         priv->irq_rx = irq_rx;
2737         priv->irq_tx = irq_tx;
2738         priv->rx_ring_size = BCMENET_DEF_RX_DESC;
2739         priv->tx_ring_size = BCMENET_DEF_TX_DESC;
2740         priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
2741
2742         pd = dev_get_platdata(&pdev->dev);
2743         if (pd) {
2744                 memcpy(dev->dev_addr, pd->mac_addr, ETH_ALEN);
2745                 memcpy(priv->used_ports, pd->used_ports,
2746                        sizeof(pd->used_ports));
2747                 priv->num_ports = pd->num_ports;
2748                 priv->dma_has_sram = pd->dma_has_sram;
2749                 priv->dma_chan_en_mask = pd->dma_chan_en_mask;
2750                 priv->dma_chan_int_mask = pd->dma_chan_int_mask;
2751                 priv->dma_chan_width = pd->dma_chan_width;
2752         }
2753
2754         ret = compute_hw_mtu(priv, dev->mtu);
2755         if (ret)
2756                 goto out;
2757
2758         if (!request_mem_region(res_mem->start, resource_size(res_mem),
2759                                 "bcm63xx_enetsw")) {
2760                 ret = -EBUSY;
2761                 goto out;
2762         }
2763
2764         priv->base = ioremap(res_mem->start, resource_size(res_mem));
2765         if (priv->base == NULL) {
2766                 ret = -ENOMEM;
2767                 goto out_release_mem;
2768         }
2769
2770         priv->mac_clk = clk_get(&pdev->dev, "enetsw");
2771         if (IS_ERR(priv->mac_clk)) {
2772                 ret = PTR_ERR(priv->mac_clk);
2773                 goto out_unmap;
2774         }
2775         clk_enable(priv->mac_clk);
2776
2777         priv->rx_chan = 0;
2778         priv->tx_chan = 1;
2779         spin_lock_init(&priv->rx_lock);
2780
2781         /* init rx timeout (used for oom) */
2782         init_timer(&priv->rx_timeout);
2783         priv->rx_timeout.function = bcm_enet_refill_rx_timer;
2784         priv->rx_timeout.data = (unsigned long)dev;
2785
2786         /* register netdevice */
2787         dev->netdev_ops = &bcm_enetsw_ops;
2788         netif_napi_add(dev, &priv->napi, bcm_enet_poll, 16);
2789         dev->ethtool_ops = &bcm_enetsw_ethtool_ops;
2790         SET_NETDEV_DEV(dev, &pdev->dev);
2791
2792         spin_lock_init(&priv->enetsw_mdio_lock);
2793
2794         ret = register_netdev(dev);
2795         if (ret)
2796                 goto out_put_clk;
2797
2798         netif_carrier_off(dev);
2799         platform_set_drvdata(pdev, dev);
2800         priv->pdev = pdev;
2801         priv->net_dev = dev;
2802
2803         return 0;
2804
2805 out_put_clk:
2806         clk_put(priv->mac_clk);
2807
2808 out_unmap:
2809         iounmap(priv->base);
2810
2811 out_release_mem:
2812         release_mem_region(res_mem->start, resource_size(res_mem));
2813 out:
2814         free_netdev(dev);
2815         return ret;
2816 }
2817
2818
2819 /* exit func, stops hardware and unregisters netdevice */
2820 static int bcm_enetsw_remove(struct platform_device *pdev)
2821 {
2822         struct bcm_enet_priv *priv;
2823         struct net_device *dev;
2824         struct resource *res;
2825
2826         /* stop netdevice */
2827         dev = platform_get_drvdata(pdev);
2828         priv = netdev_priv(dev);
2829         unregister_netdev(dev);
2830
2831         /* release device resources */
2832         iounmap(priv->base);
2833         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2834         release_mem_region(res->start, resource_size(res));
2835
2836         free_netdev(dev);
2837         return 0;
2838 }
2839
2840 struct platform_driver bcm63xx_enetsw_driver = {
2841         .probe  = bcm_enetsw_probe,
2842         .remove = bcm_enetsw_remove,
2843         .driver = {
2844                 .name   = "bcm63xx_enetsw",
2845                 .owner  = THIS_MODULE,
2846         },
2847 };
2848
2849 /* reserve & remap memory space shared between all macs */
2850 static int bcm_enet_shared_probe(struct platform_device *pdev)
2851 {
2852         struct resource *res;
2853         void __iomem *p[3];
2854         unsigned int i;
2855
2856         memset(bcm_enet_shared_base, 0, sizeof(bcm_enet_shared_base));
2857
2858         for (i = 0; i < 3; i++) {
2859                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
2860                 p[i] = devm_ioremap_resource(&pdev->dev, res);
2861                 if (IS_ERR(p[i]))
2862                         return PTR_ERR(p[i]);
2863         }
2864
2865         memcpy(bcm_enet_shared_base, p, sizeof(bcm_enet_shared_base));
2866
2867         return 0;
2868 }
2869
2870 static int bcm_enet_shared_remove(struct platform_device *pdev)
2871 {
2872         return 0;
2873 }
2874
2875 /* this "shared" driver is needed because both macs share a single
2876  * address space
2877  */
2878 struct platform_driver bcm63xx_enet_shared_driver = {
2879         .probe  = bcm_enet_shared_probe,
2880         .remove = bcm_enet_shared_remove,
2881         .driver = {
2882                 .name   = "bcm63xx_enet_shared",
2883                 .owner  = THIS_MODULE,
2884         },
2885 };
2886
2887 /* entry point */
2888 static int __init bcm_enet_init(void)
2889 {
2890         int ret;
2891
2892         ret = platform_driver_register(&bcm63xx_enet_shared_driver);
2893         if (ret)
2894                 return ret;
2895
2896         ret = platform_driver_register(&bcm63xx_enet_driver);
2897         if (ret)
2898                 platform_driver_unregister(&bcm63xx_enet_shared_driver);
2899
2900         ret = platform_driver_register(&bcm63xx_enetsw_driver);
2901         if (ret) {
2902                 platform_driver_unregister(&bcm63xx_enet_driver);
2903                 platform_driver_unregister(&bcm63xx_enet_shared_driver);
2904         }
2905
2906         return ret;
2907 }
2908
2909 static void __exit bcm_enet_exit(void)
2910 {
2911         platform_driver_unregister(&bcm63xx_enet_driver);
2912         platform_driver_unregister(&bcm63xx_enetsw_driver);
2913         platform_driver_unregister(&bcm63xx_enet_shared_driver);
2914 }
2915
2916
2917 module_init(bcm_enet_init);
2918 module_exit(bcm_enet_exit);
2919
2920 MODULE_DESCRIPTION("BCM63xx internal ethernet mac driver");
2921 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
2922 MODULE_LICENSE("GPL");