linux/drivers/net/ethernet/toshiba/ps3_gelic_net.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  PS3 gelic network driver.
   4 *
   5 * Copyright (C) 2007 Sony Computer Entertainment Inc.
   6 * Copyright 2006, 2007 Sony Corporation
   7 *
   8 * This file is based on: spider_net.c
   9 *
  10 * (C) Copyright IBM Corp. 2005
  11 *
  12 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
  13 *           Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
  14 */
  15
  16#undef DEBUG
  17
  18#include <linux/interrupt.h>
  19#include <linux/kernel.h>
  20#include <linux/module.h>
  21#include <linux/slab.h>
  22
  23#include <linux/etherdevice.h>
  24#include <linux/ethtool.h>
  25#include <linux/if_vlan.h>
  26
  27#include <linux/in.h>
  28#include <linux/ip.h>
  29#include <linux/tcp.h>
  30
  31#include <linux/dma-mapping.h>
  32#include <net/checksum.h>
  33#include <asm/firmware.h>
  34#include <asm/ps3.h>
  35#include <asm/lv1call.h>
  36
  37#include "ps3_gelic_net.h"
  38#include "ps3_gelic_wireless.h"
  39
  40#define DRV_NAME "Gelic Network Driver"
  41#define DRV_VERSION "2.0"
  42
  43MODULE_AUTHOR("SCE Inc.");
  44MODULE_DESCRIPTION("Gelic Network driver");
  45MODULE_LICENSE("GPL");
  46
  47
  48/* set irq_mask */
  49int gelic_card_set_irq_mask(struct gelic_card *card, u64 mask)
  50{
  51        int status;
  52
  53        status = lv1_net_set_interrupt_mask(bus_id(card), dev_id(card),
  54                                            mask, 0);
  55        if (status)
  56                dev_info(ctodev(card),
  57                         "%s failed %d\n", __func__, status);
  58        return status;
  59}
  60
  61static void gelic_card_rx_irq_on(struct gelic_card *card)
  62{
  63        card->irq_mask |= GELIC_CARD_RXINT;
  64        gelic_card_set_irq_mask(card, card->irq_mask);
  65}
  66static void gelic_card_rx_irq_off(struct gelic_card *card)
  67{
  68        card->irq_mask &= ~GELIC_CARD_RXINT;
  69        gelic_card_set_irq_mask(card, card->irq_mask);
  70}
  71
  72static void gelic_card_get_ether_port_status(struct gelic_card *card,
  73                                             int inform)
  74{
  75        u64 v2;
  76        struct net_device *ether_netdev;
  77
  78        lv1_net_control(bus_id(card), dev_id(card),
  79                        GELIC_LV1_GET_ETH_PORT_STATUS,
  80                        GELIC_LV1_VLAN_TX_ETHERNET_0, 0, 0,
  81                        &card->ether_port_status, &v2);
  82
  83        if (inform) {
  84                ether_netdev = card->netdev[GELIC_PORT_ETHERNET_0];
  85                if (card->ether_port_status & GELIC_LV1_ETHER_LINK_UP)
  86                        netif_carrier_on(ether_netdev);
  87                else
  88                        netif_carrier_off(ether_netdev);
  89        }
  90}
  91
  92/**
  93 * gelic_descr_get_status -- returns the status of a descriptor
  94 * @descr: descriptor to look at
  95 *
  96 * returns the status as in the dmac_cmd_status field of the descriptor
  97 */
  98static enum gelic_descr_dma_status
  99gelic_descr_get_status(struct gelic_descr *descr)
 100{
 101        return be32_to_cpu(descr->dmac_cmd_status) & GELIC_DESCR_DMA_STAT_MASK;
 102}
 103
 104static int gelic_card_set_link_mode(struct gelic_card *card, int mode)
 105{
 106        int status;
 107        u64 v1, v2;
 108
 109        status = lv1_net_control(bus_id(card), dev_id(card),
 110                                 GELIC_LV1_SET_NEGOTIATION_MODE,
 111                                 GELIC_LV1_PHY_ETHERNET_0, mode, 0, &v1, &v2);
 112        if (status) {
 113                pr_info("%s: failed setting negotiation mode %d\n", __func__,
 114                        status);
 115                return -EBUSY;
 116        }
 117
 118        card->link_mode = mode;
 119        return 0;
 120}
 121
 122/**
 123 * gelic_card_disable_txdmac - disables the transmit DMA controller
 124 * @card: card structure
 125 *
 126 * gelic_card_disable_txdmac terminates processing on the DMA controller by
 127 * turing off DMA and issuing a force end
 128 */
 129static void gelic_card_disable_txdmac(struct gelic_card *card)
 130{
 131        int status;
 132
 133        /* this hvc blocks until the DMA in progress really stopped */
 134        status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card));
 135        if (status)
 136                dev_err(ctodev(card),
 137                        "lv1_net_stop_tx_dma failed, status=%d\n", status);
 138}
 139
 140/**
 141 * gelic_card_enable_rxdmac - enables the receive DMA controller
 142 * @card: card structure
 143 *
 144 * gelic_card_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
 145 * in the GDADMACCNTR register
 146 */
 147static void gelic_card_enable_rxdmac(struct gelic_card *card)
 148{
 149        int status;
 150
 151#ifdef DEBUG
 152        if (gelic_descr_get_status(card->rx_chain.head) !=
 153            GELIC_DESCR_DMA_CARDOWNED) {
 154                printk(KERN_ERR "%s: status=%x\n", __func__,
 155                       be32_to_cpu(card->rx_chain.head->dmac_cmd_status));
 156                printk(KERN_ERR "%s: nextphy=%x\n", __func__,
 157                       be32_to_cpu(card->rx_chain.head->next_descr_addr));
 158                printk(KERN_ERR "%s: head=%p\n", __func__,
 159                       card->rx_chain.head);
 160        }
 161#endif
 162        status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
 163                                card->rx_chain.head->bus_addr, 0);
 164        if (status)
 165                dev_info(ctodev(card),
 166                         "lv1_net_start_rx_dma failed, status=%d\n", status);
 167}
 168
 169/**
 170 * gelic_card_disable_rxdmac - disables the receive DMA controller
 171 * @card: card structure
 172 *
 173 * gelic_card_disable_rxdmac terminates processing on the DMA controller by
 174 * turing off DMA and issuing a force end
 175 */
 176static void gelic_card_disable_rxdmac(struct gelic_card *card)
 177{
 178        int status;
 179
 180        /* this hvc blocks until the DMA in progress really stopped */
 181        status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card));
 182        if (status)
 183                dev_err(ctodev(card),
 184                        "lv1_net_stop_rx_dma failed, %d\n", status);
 185}
 186
 187/**
 188 * gelic_descr_set_status -- sets the status of a descriptor
 189 * @descr: descriptor to change
 190 * @status: status to set in the descriptor
 191 *
 192 * changes the status to the specified value. Doesn't change other bits
 193 * in the status
 194 */
 195static void gelic_descr_set_status(struct gelic_descr *descr,
 196                                   enum gelic_descr_dma_status status)
 197{
 198        descr->dmac_cmd_status = cpu_to_be32(status |
 199                        (be32_to_cpu(descr->dmac_cmd_status) &
 200                         ~GELIC_DESCR_DMA_STAT_MASK));
 201        /*
 202         * dma_cmd_status field is used to indicate whether the descriptor
 203         * is valid or not.
 204         * Usually caller of this function wants to inform that to the
 205         * hardware, so we assure here the hardware sees the change.
 206         */
 207        wmb();
 208}
 209
 210/**
 211 * gelic_card_reset_chain - reset status of a descriptor chain
 212 * @card: card structure
 213 * @chain: address of chain
 214 * @start_descr: address of descriptor array
 215 *
 216 * Reset the status of dma descriptors to ready state
 217 * and re-initialize the hardware chain for later use
 218 */
 219static void gelic_card_reset_chain(struct gelic_card *card,
 220                                   struct gelic_descr_chain *chain,
 221                                   struct gelic_descr *start_descr)
 222{
 223        struct gelic_descr *descr;
 224
 225        for (descr = start_descr; start_descr != descr->next; descr++) {
 226                gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
 227                descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
 228        }
 229
 230        chain->head = start_descr;
 231        chain->tail = (descr - 1);
 232
 233        (descr - 1)->next_descr_addr = 0;
 234}
 235
 236void gelic_card_up(struct gelic_card *card)
 237{
 238        pr_debug("%s: called\n", __func__);
 239        mutex_lock(&card->updown_lock);
 240        if (atomic_inc_return(&card->users) == 1) {
 241                pr_debug("%s: real do\n", __func__);
 242                /* enable irq */
 243                gelic_card_set_irq_mask(card, card->irq_mask);
 244                /* start rx */
 245                gelic_card_enable_rxdmac(card);
 246
 247                napi_enable(&card->napi);
 248        }
 249        mutex_unlock(&card->updown_lock);
 250        pr_debug("%s: done\n", __func__);
 251}
 252
 253void gelic_card_down(struct gelic_card *card)
 254{
 255        u64 mask;
 256        pr_debug("%s: called\n", __func__);
 257        mutex_lock(&card->updown_lock);
 258        if (atomic_dec_if_positive(&card->users) == 0) {
 259                pr_debug("%s: real do\n", __func__);
 260                napi_disable(&card->napi);
 261                /*
 262                 * Disable irq. Wireless interrupts will
 263                 * be disabled later if any
 264                 */
 265                mask = card->irq_mask & (GELIC_CARD_WLAN_EVENT_RECEIVED |
 266                                         GELIC_CARD_WLAN_COMMAND_COMPLETED);
 267                gelic_card_set_irq_mask(card, mask);
 268                /* stop rx */
 269                gelic_card_disable_rxdmac(card);
 270                gelic_card_reset_chain(card, &card->rx_chain,
 271                                       card->descr + GELIC_NET_TX_DESCRIPTORS);
 272                /* stop tx */
 273                gelic_card_disable_txdmac(card);
 274        }
 275        mutex_unlock(&card->updown_lock);
 276        pr_debug("%s: done\n", __func__);
 277}
 278
 279/**
 280 * gelic_card_free_chain - free descriptor chain
 281 * @card: card structure
 282 * @descr_in: address of desc
 283 */
 284static void gelic_card_free_chain(struct gelic_card *card,
 285                                  struct gelic_descr *descr_in)
 286{
 287        struct gelic_descr *descr;
 288
 289        for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) {
 290                dma_unmap_single(ctodev(card), descr->bus_addr,
 291                                 GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
 292                descr->bus_addr = 0;
 293        }
 294}
 295
 296/**
 297 * gelic_card_init_chain - links descriptor chain
 298 * @card: card structure
 299 * @chain: address of chain
 300 * @start_descr: address of descriptor array
 301 * @no: number of descriptors
 302 *
 303 * we manage a circular list that mirrors the hardware structure,
 304 * except that the hardware uses bus addresses.
 305 *
 306 * returns 0 on success, <0 on failure
 307 */
 308static int gelic_card_init_chain(struct gelic_card *card,
 309                                 struct gelic_descr_chain *chain,
 310                                 struct gelic_descr *start_descr, int no)
 311{
 312        int i;
 313        struct gelic_descr *descr;
 314
 315        descr = start_descr;
 316        memset(descr, 0, sizeof(*descr) * no);
 317
 318        /* set up the hardware pointers in each descriptor */
 319        for (i = 0; i < no; i++, descr++) {
 320                gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
 321                descr->bus_addr =
 322                        dma_map_single(ctodev(card), descr,
 323                                       GELIC_DESCR_SIZE,
 324                                       DMA_BIDIRECTIONAL);
 325
 326                if (!descr->bus_addr)
 327                        goto iommu_error;
 328
 329                descr->next = descr + 1;
 330                descr->prev = descr - 1;
 331        }
 332        /* make them as ring */
 333        (descr - 1)->next = start_descr;
 334        start_descr->prev = (descr - 1);
 335
 336        /* chain bus addr of hw descriptor */
 337        descr = start_descr;
 338        for (i = 0; i < no; i++, descr++) {
 339                descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
 340        }
 341
 342        chain->head = start_descr;
 343        chain->tail = start_descr;
 344
 345        /* do not chain last hw descriptor */
 346        (descr - 1)->next_descr_addr = 0;
 347
 348        return 0;
 349
 350iommu_error:
 351        for (i--, descr--; 0 <= i; i--, descr--)
 352                if (descr->bus_addr)
 353                        dma_unmap_single(ctodev(card), descr->bus_addr,
 354                                         GELIC_DESCR_SIZE,
 355                                         DMA_BIDIRECTIONAL);
 356        return -ENOMEM;
 357}
 358
 359/**
 360 * gelic_descr_prepare_rx - reinitializes a rx descriptor
 361 * @card: card structure
 362 * @descr: descriptor to re-init
 363 *
 364 * return 0 on success, <0 on failure
 365 *
 366 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
 367 * Activate the descriptor state-wise
 368 */
 369static int gelic_descr_prepare_rx(struct gelic_card *card,
 370                                  struct gelic_descr *descr)
 371{
 372        int offset;
 373        unsigned int bufsize;
 374
 375        if (gelic_descr_get_status(descr) !=  GELIC_DESCR_DMA_NOT_IN_USE)
 376                dev_info(ctodev(card), "%s: ERROR status\n", __func__);
 377        /* we need to round up the buffer size to a multiple of 128 */
 378        bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN);
 379
 380        /* and we need to have it 128 byte aligned, therefore we allocate a
 381         * bit more */
 382        descr->skb = dev_alloc_skb(bufsize + GELIC_NET_RXBUF_ALIGN - 1);
 383        if (!descr->skb) {
 384                descr->buf_addr = 0; /* tell DMAC don't touch memory */
 385                dev_info(ctodev(card),
 386                         "%s:allocate skb failed !!\n", __func__);
 387                return -ENOMEM;
 388        }
 389        descr->buf_size = cpu_to_be32(bufsize);
 390        descr->dmac_cmd_status = 0;
 391        descr->result_size = 0;
 392        descr->valid_size = 0;
 393        descr->data_error = 0;
 394
 395        offset = ((unsigned long)descr->skb->data) &
 396                (GELIC_NET_RXBUF_ALIGN - 1);
 397        if (offset)
 398                skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
 399        /* io-mmu-map the skb */
 400        descr->buf_addr = cpu_to_be32(dma_map_single(ctodev(card),
 401                                                     descr->skb->data,
 402                                                     GELIC_NET_MAX_MTU,
 403                                                     DMA_FROM_DEVICE));
 404        if (!descr->buf_addr) {
 405                dev_kfree_skb_any(descr->skb);
 406                descr->skb = NULL;
 407                dev_info(ctodev(card),
 408                         "%s:Could not iommu-map rx buffer\n", __func__);
 409                gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
 410                return -ENOMEM;
 411        } else {
 412                gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
 413                return 0;
 414        }
 415}
 416
 417/**
 418 * gelic_card_release_rx_chain - free all skb of rx descr
 419 * @card: card structure
 420 *
 421 */
 422static void gelic_card_release_rx_chain(struct gelic_card *card)
 423{
 424        struct gelic_descr *descr = card->rx_chain.head;
 425
 426        do {
 427                if (descr->skb) {
 428                        dma_unmap_single(ctodev(card),
 429                                         be32_to_cpu(descr->buf_addr),
 430                                         descr->skb->len,
 431                                         DMA_FROM_DEVICE);
 432                        descr->buf_addr = 0;
 433                        dev_kfree_skb_any(descr->skb);
 434                        descr->skb = NULL;
 435                        gelic_descr_set_status(descr,
 436                                               GELIC_DESCR_DMA_NOT_IN_USE);
 437                }
 438                descr = descr->next;
 439        } while (descr != card->rx_chain.head);
 440}
 441
 442/**
 443 * gelic_card_fill_rx_chain - fills descriptors/skbs in the rx chains
 444 * @card: card structure
 445 *
 446 * fills all descriptors in the rx chain: allocates skbs
 447 * and iommu-maps them.
 448 * returns 0 on success, < 0 on failure
 449 */
 450static int gelic_card_fill_rx_chain(struct gelic_card *card)
 451{
 452        struct gelic_descr *descr = card->rx_chain.head;
 453        int ret;
 454
 455        do {
 456                if (!descr->skb) {
 457                        ret = gelic_descr_prepare_rx(card, descr);
 458                        if (ret)
 459                                goto rewind;
 460                }
 461                descr = descr->next;
 462        } while (descr != card->rx_chain.head);
 463
 464        return 0;
 465rewind:
 466        gelic_card_release_rx_chain(card);
 467        return ret;
 468}
 469
 470/**
 471 * gelic_card_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
 472 * @card: card structure
 473 *
 474 * returns 0 on success, < 0 on failure
 475 */
 476static int gelic_card_alloc_rx_skbs(struct gelic_card *card)
 477{
 478        struct gelic_descr_chain *chain;
 479        int ret;
 480        chain = &card->rx_chain;
 481        ret = gelic_card_fill_rx_chain(card);
 482        chain->tail = card->rx_top->prev; /* point to the last */
 483        return ret;
 484}
 485
 486/**
 487 * gelic_descr_release_tx - processes a used tx descriptor
 488 * @card: card structure
 489 * @descr: descriptor to release
 490 *
 491 * releases a used tx descriptor (unmapping, freeing of skb)
 492 */
 493static void gelic_descr_release_tx(struct gelic_card *card,
 494                                       struct gelic_descr *descr)
 495{
 496        struct sk_buff *skb = descr->skb;
 497
 498        BUG_ON(!(be32_to_cpu(descr->data_status) & GELIC_DESCR_TX_TAIL));
 499
 500        dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr), skb->len,
 501                         DMA_TO_DEVICE);
 502        dev_kfree_skb_any(skb);
 503
 504        descr->buf_addr = 0;
 505        descr->buf_size = 0;
 506        descr->next_descr_addr = 0;
 507        descr->result_size = 0;
 508        descr->valid_size = 0;
 509        descr->data_status = 0;
 510        descr->data_error = 0;
 511        descr->skb = NULL;
 512
 513        /* set descr status */
 514        gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
 515}
 516
 517static void gelic_card_stop_queues(struct gelic_card *card)
 518{
 519        netif_stop_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
 520
 521        if (card->netdev[GELIC_PORT_WIRELESS])
 522                netif_stop_queue(card->netdev[GELIC_PORT_WIRELESS]);
 523}
 524static void gelic_card_wake_queues(struct gelic_card *card)
 525{
 526        netif_wake_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
 527
 528        if (card->netdev[GELIC_PORT_WIRELESS])
 529                netif_wake_queue(card->netdev[GELIC_PORT_WIRELESS]);
 530}
 531/**
 532 * gelic_card_release_tx_chain - processes sent tx descriptors
 533 * @card: adapter structure
 534 * @stop: net_stop sequence
 535 *
 536 * releases the tx descriptors that gelic has finished with
 537 */
 538static void gelic_card_release_tx_chain(struct gelic_card *card, int stop)
 539{
 540        struct gelic_descr_chain *tx_chain;
 541        enum gelic_descr_dma_status status;
 542        struct net_device *netdev;
 543        int release = 0;
 544
 545        for (tx_chain = &card->tx_chain;
 546             tx_chain->head != tx_chain->tail && tx_chain->tail;
 547             tx_chain->tail = tx_chain->tail->next) {
 548                status = gelic_descr_get_status(tx_chain->tail);
 549                netdev = tx_chain->tail->skb->dev;
 550                switch (status) {
 551                case GELIC_DESCR_DMA_RESPONSE_ERROR:
 552                case GELIC_DESCR_DMA_PROTECTION_ERROR:
 553                case GELIC_DESCR_DMA_FORCE_END:
 554                        if (printk_ratelimit())
 555                                dev_info(ctodev(card),
 556                                         "%s: forcing end of tx descriptor " \
 557                                         "with status %x\n",
 558                                         __func__, status);
 559                        netdev->stats.tx_dropped++;
 560                        break;
 561
 562                case GELIC_DESCR_DMA_COMPLETE:
 563                        if (tx_chain->tail->skb) {
 564                                netdev->stats.tx_packets++;
 565                                netdev->stats.tx_bytes +=
 566                                        tx_chain->tail->skb->len;
 567                        }
 568                        break;
 569
 570                case GELIC_DESCR_DMA_CARDOWNED:
 571                        /* pending tx request */
 572                default:
 573                        /* any other value (== GELIC_DESCR_DMA_NOT_IN_USE) */
 574                        if (!stop)
 575                                goto out;
 576                }
 577                gelic_descr_release_tx(card, tx_chain->tail);
 578                release ++;
 579        }
 580out:
 581        if (!stop && release)
 582                gelic_card_wake_queues(card);
 583}
 584
 585/**
 586 * gelic_net_set_multi - sets multicast addresses and promisc flags
 587 * @netdev: interface device structure
 588 *
 589 * gelic_net_set_multi configures multicast addresses as needed for the
 590 * netdev interface. It also sets up multicast, allmulti and promisc
 591 * flags appropriately
 592 */
 593void gelic_net_set_multi(struct net_device *netdev)
 594{
 595        struct gelic_card *card = netdev_card(netdev);
 596        struct netdev_hw_addr *ha;
 597        unsigned int i;
 598        uint8_t *p;
 599        u64 addr;
 600        int status;
 601
 602        /* clear all multicast address */
 603        status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
 604                                                  0, 1);
 605        if (status)
 606                dev_err(ctodev(card),
 607                        "lv1_net_remove_multicast_address failed %d\n",
 608                        status);
 609        /* set broadcast address */
 610        status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
 611                                               GELIC_NET_BROADCAST_ADDR, 0);
 612        if (status)
 613                dev_err(ctodev(card),
 614                        "lv1_net_add_multicast_address failed, %d\n",
 615                        status);
 616
 617        if ((netdev->flags & IFF_ALLMULTI) ||
 618            (netdev_mc_count(netdev) > GELIC_NET_MC_COUNT_MAX)) {
 619                status = lv1_net_add_multicast_address(bus_id(card),
 620                                                       dev_id(card),
 621                                                       0, 1);
 622                if (status)
 623                        dev_err(ctodev(card),
 624                                "lv1_net_add_multicast_address failed, %d\n",
 625                                status);
 626                return;
 627        }
 628
 629        /* set multicast addresses */
 630        netdev_for_each_mc_addr(ha, netdev) {
 631                addr = 0;
 632                p = ha->addr;
 633                for (i = 0; i < ETH_ALEN; i++) {
 634                        addr <<= 8;
 635                        addr |= *p++;
 636                }
 637                status = lv1_net_add_multicast_address(bus_id(card),
 638                                                       dev_id(card),
 639                                                       addr, 0);
 640                if (status)
 641                        dev_err(ctodev(card),
 642                                "lv1_net_add_multicast_address failed, %d\n",
 643                                status);
 644        }
 645}
 646
 647/**
 648 * gelic_net_stop - called upon ifconfig down
 649 * @netdev: interface device structure
 650 *
 651 * always returns 0
 652 */
 653int gelic_net_stop(struct net_device *netdev)
 654{
 655        struct gelic_card *card;
 656
 657        pr_debug("%s: start\n", __func__);
 658
 659        netif_stop_queue(netdev);
 660        netif_carrier_off(netdev);
 661
 662        card = netdev_card(netdev);
 663        gelic_card_down(card);
 664
 665        pr_debug("%s: done\n", __func__);
 666        return 0;
 667}
 668
 669/**
 670 * gelic_card_get_next_tx_descr - returns the next available tx descriptor
 671 * @card: device structure to get descriptor from
 672 *
 673 * returns the address of the next descriptor, or NULL if not available.
 674 */
 675static struct gelic_descr *
 676gelic_card_get_next_tx_descr(struct gelic_card *card)
 677{
 678        if (!card->tx_chain.head)
 679                return NULL;
 680        /*  see if the next descriptor is free */
 681        if (card->tx_chain.tail != card->tx_chain.head->next &&
 682            gelic_descr_get_status(card->tx_chain.head) ==
 683            GELIC_DESCR_DMA_NOT_IN_USE)
 684                return card->tx_chain.head;
 685        else
 686                return NULL;
 687
 688}
 689
 690/**
 691 * gelic_net_set_txdescr_cmdstat - sets the tx descriptor command field
 692 * @descr: descriptor structure to fill out
 693 * @skb: packet to consider
 694 *
 695 * fills out the command and status field of the descriptor structure,
 696 * depending on hardware checksum settings. This function assumes a wmb()
 697 * has executed before.
 698 */
 699static void gelic_descr_set_tx_cmdstat(struct gelic_descr *descr,
 700                                       struct sk_buff *skb)
 701{
 702        if (skb->ip_summed != CHECKSUM_PARTIAL)
 703                descr->dmac_cmd_status =
 704                        cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
 705                                    GELIC_DESCR_TX_DMA_FRAME_TAIL);
 706        else {
 707                /* is packet ip?
 708                 * if yes: tcp? udp? */
 709                if (skb->protocol == htons(ETH_P_IP)) {
 710                        if (ip_hdr(skb)->protocol == IPPROTO_TCP)
 711                                descr->dmac_cmd_status =
 712                                cpu_to_be32(GELIC_DESCR_DMA_CMD_TCP_CHKSUM |
 713                                            GELIC_DESCR_TX_DMA_FRAME_TAIL);
 714
 715                        else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
 716                                descr->dmac_cmd_status =
 717                                cpu_to_be32(GELIC_DESCR_DMA_CMD_UDP_CHKSUM |
 718                                            GELIC_DESCR_TX_DMA_FRAME_TAIL);
 719                        else    /*
 720                                 * the stack should checksum non-tcp and non-udp
 721                                 * packets on his own: NETIF_F_IP_CSUM
 722                                 */
 723                                descr->dmac_cmd_status =
 724                                cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
 725                                            GELIC_DESCR_TX_DMA_FRAME_TAIL);
 726                }
 727        }
 728}
 729
 730static struct sk_buff *gelic_put_vlan_tag(struct sk_buff *skb,
 731                                                 unsigned short tag)
 732{
 733        struct vlan_ethhdr *veth;
 734        static unsigned int c;
 735
 736        if (skb_headroom(skb) < VLAN_HLEN) {
 737                struct sk_buff *sk_tmp = skb;
 738                pr_debug("%s: hd=%d c=%ud\n", __func__, skb_headroom(skb), c);
 739                skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
 740                if (!skb)
 741                        return NULL;
 742                dev_kfree_skb_any(sk_tmp);
 743        }
 744        veth = skb_push(skb, VLAN_HLEN);
 745
 746        /* Move the mac addresses to the top of buffer */
 747        memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
 748
 749        veth->h_vlan_proto = cpu_to_be16(ETH_P_8021Q);
 750        veth->h_vlan_TCI = htons(tag);
 751
 752        return skb;
 753}
 754
 755/**
 756 * gelic_descr_prepare_tx - setup a descriptor for sending packets
 757 * @card: card structure
 758 * @descr: descriptor structure
 759 * @skb: packet to use
 760 *
 761 * returns 0 on success, <0 on failure.
 762 *
 763 */
 764static int gelic_descr_prepare_tx(struct gelic_card *card,
 765                                  struct gelic_descr *descr,
 766                                  struct sk_buff *skb)
 767{
 768        dma_addr_t buf;
 769
 770        if (card->vlan_required) {
 771                struct sk_buff *skb_tmp;
 772                enum gelic_port_type type;
 773
 774                type = netdev_port(skb->dev)->type;
 775                skb_tmp = gelic_put_vlan_tag(skb,
 776                                             card->vlan[type].tx);
 777                if (!skb_tmp)
 778                        return -ENOMEM;
 779                skb = skb_tmp;
 780        }
 781
 782        buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE);
 783
 784        if (!buf) {
 785                dev_err(ctodev(card),
 786                        "dma map 2 failed (%p, %i). Dropping packet\n",
 787                        skb->data, skb->len);
 788                return -ENOMEM;
 789        }
 790
 791        descr->buf_addr = cpu_to_be32(buf);
 792        descr->buf_size = cpu_to_be32(skb->len);
 793        descr->skb = skb;
 794        descr->data_status = 0;
 795        descr->next_descr_addr = 0; /* terminate hw descr */
 796        gelic_descr_set_tx_cmdstat(descr, skb);
 797
 798        /* bump free descriptor pointer */
 799        card->tx_chain.head = descr->next;
 800        return 0;
 801}
 802
 803/**
 804 * gelic_card_kick_txdma - enables TX DMA processing
 805 * @card: card structure
 806 * @descr: descriptor address to enable TX processing at
 807 *
 808 */
 809static int gelic_card_kick_txdma(struct gelic_card *card,
 810                                 struct gelic_descr *descr)
 811{
 812        int status = 0;
 813
 814        if (card->tx_dma_progress)
 815                return 0;
 816
 817        if (gelic_descr_get_status(descr) == GELIC_DESCR_DMA_CARDOWNED) {
 818                card->tx_dma_progress = 1;
 819                status = lv1_net_start_tx_dma(bus_id(card), dev_id(card),
 820                                              descr->bus_addr, 0);
 821                if (status) {
 822                        card->tx_dma_progress = 0;
 823                        dev_info(ctodev(card), "lv1_net_start_txdma failed," \
 824                                 "status=%d\n", status);
 825                }
 826        }
 827        return status;
 828}
 829
 830/**
 831 * gelic_net_xmit - transmits a frame over the device
 832 * @skb: packet to send out
 833 * @netdev: interface device structure
 834 *
 835 * returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure
 836 */
 837netdev_tx_t gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
 838{
 839        struct gelic_card *card = netdev_card(netdev);
 840        struct gelic_descr *descr;
 841        int result;
 842        unsigned long flags;
 843
 844        spin_lock_irqsave(&card->tx_lock, flags);
 845
 846        gelic_card_release_tx_chain(card, 0);
 847
 848        descr = gelic_card_get_next_tx_descr(card);
 849        if (!descr) {
 850                /*
 851                 * no more descriptors free
 852                 */
 853                gelic_card_stop_queues(card);
 854                spin_unlock_irqrestore(&card->tx_lock, flags);
 855                return NETDEV_TX_BUSY;
 856        }
 857
 858        result = gelic_descr_prepare_tx(card, descr, skb);
 859        if (result) {
 860                /*
 861                 * DMA map failed.  As chances are that failure
 862                 * would continue, just release skb and return
 863                 */
 864                netdev->stats.tx_dropped++;
 865                dev_kfree_skb_any(skb);
 866                spin_unlock_irqrestore(&card->tx_lock, flags);
 867                return NETDEV_TX_OK;
 868        }
 869        /*
 870         * link this prepared descriptor to previous one
 871         * to achieve high performance
 872         */
 873        descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
 874        /*
 875         * as hardware descriptor is modified in the above lines,
 876         * ensure that the hardware sees it
 877         */
 878        wmb();
 879        if (gelic_card_kick_txdma(card, descr)) {
 880                /*
 881                 * kick failed.
 882                 * release descriptor which was just prepared
 883                 */
 884                netdev->stats.tx_dropped++;
 885                /* don't trigger BUG_ON() in gelic_descr_release_tx */
 886                descr->data_status = cpu_to_be32(GELIC_DESCR_TX_TAIL);
 887                gelic_descr_release_tx(card, descr);
 888                /* reset head */
 889                card->tx_chain.head = descr;
 890                /* reset hw termination */
 891                descr->prev->next_descr_addr = 0;
 892                dev_info(ctodev(card), "%s: kick failure\n", __func__);
 893        }
 894
 895        spin_unlock_irqrestore(&card->tx_lock, flags);
 896        return NETDEV_TX_OK;
 897}
 898
 899/**
 900 * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
 901 * @descr: descriptor to process
 902 * @card: card structure
 903 * @netdev: net_device structure to be passed packet
 904 *
 905 * iommu-unmaps the skb, fills out skb structure and passes the data to the
 906 * stack. The descriptor state is not changed.
 907 */
 908static void gelic_net_pass_skb_up(struct gelic_descr *descr,
 909                                  struct gelic_card *card,
 910                                  struct net_device *netdev)
 911
 912{
 913        struct sk_buff *skb = descr->skb;
 914        u32 data_status, data_error;
 915
 916        data_status = be32_to_cpu(descr->data_status);
 917        data_error = be32_to_cpu(descr->data_error);
 918        /* unmap skb buffer */
 919        dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
 920                         GELIC_NET_MAX_MTU,
 921                         DMA_FROM_DEVICE);
 922
 923        skb_put(skb, be32_to_cpu(descr->valid_size)?
 924                be32_to_cpu(descr->valid_size) :
 925                be32_to_cpu(descr->result_size));
 926        if (!descr->valid_size)
 927                dev_info(ctodev(card), "buffer full %x %x %x\n",
 928                         be32_to_cpu(descr->result_size),
 929                         be32_to_cpu(descr->buf_size),
 930                         be32_to_cpu(descr->dmac_cmd_status));
 931
 932        descr->skb = NULL;
 933        /*
 934         * the card put 2 bytes vlan tag in front
 935         * of the ethernet frame
 936         */
 937        skb_pull(skb, 2);
 938        skb->protocol = eth_type_trans(skb, netdev);
 939
 940        /* checksum offload */
 941        if (netdev->features & NETIF_F_RXCSUM) {
 942                if ((data_status & GELIC_DESCR_DATA_STATUS_CHK_MASK) &&
 943                    (!(data_error & GELIC_DESCR_DATA_ERROR_CHK_MASK)))
 944                        skb->ip_summed = CHECKSUM_UNNECESSARY;
 945                else
 946                        skb_checksum_none_assert(skb);
 947        } else
 948                skb_checksum_none_assert(skb);
 949
 950        /* update netdevice statistics */
 951        netdev->stats.rx_packets++;
 952        netdev->stats.rx_bytes += skb->len;
 953
 954        /* pass skb up to stack */
 955        netif_receive_skb(skb);
 956}
 957
 958/**
 959 * gelic_card_decode_one_descr - processes an rx descriptor
 960 * @card: card structure
 961 *
 962 * returns 1 if a packet has been sent to the stack, otherwise 0
 963 *
 964 * processes an rx descriptor by iommu-unmapping the data buffer and passing
 965 * the packet up to the stack
 966 */
 967static int gelic_card_decode_one_descr(struct gelic_card *card)
 968{
 969        enum gelic_descr_dma_status status;
 970        struct gelic_descr_chain *chain = &card->rx_chain;
 971        struct gelic_descr *descr = chain->head;
 972        struct net_device *netdev = NULL;
 973        int dmac_chain_ended;
 974
 975        status = gelic_descr_get_status(descr);
 976
 977        if (status == GELIC_DESCR_DMA_CARDOWNED)
 978                return 0;
 979
 980        if (status == GELIC_DESCR_DMA_NOT_IN_USE) {
 981                dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
 982                return 0;
 983        }
 984
 985        /* netdevice select */
 986        if (card->vlan_required) {
 987                unsigned int i;
 988                u16 vid;
 989                vid = *(u16 *)(descr->skb->data) & VLAN_VID_MASK;
 990                for (i = 0; i < GELIC_PORT_MAX; i++) {
 991                        if (card->vlan[i].rx == vid) {
 992                                netdev = card->netdev[i];
 993                                break;
 994                        }
 995                }
 996                if (GELIC_PORT_MAX <= i) {
 997                        pr_info("%s: unknown packet vid=%x\n", __func__, vid);
 998                        goto refill;
 999                }
1000        } else
1001                netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1002
1003        if ((status == GELIC_DESCR_DMA_RESPONSE_ERROR) ||
1004            (status == GELIC_DESCR_DMA_PROTECTION_ERROR) ||
1005            (status == GELIC_DESCR_DMA_FORCE_END)) {
1006                dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
1007                         status);
1008                netdev->stats.rx_dropped++;
1009                goto refill;
1010        }
1011
1012        if (status == GELIC_DESCR_DMA_BUFFER_FULL) {
1013                /*
1014                 * Buffer full would occur if and only if
1015                 * the frame length was longer than the size of this
1016                 * descriptor's buffer.  If the frame length was equal
1017                 * to or shorter than buffer'size, FRAME_END condition
1018                 * would occur.
1019                 * Anyway this frame was longer than the MTU,
1020                 * just drop it.
1021                 */
1022                dev_info(ctodev(card), "overlength frame\n");
1023                goto refill;
1024        }
1025        /*
1026         * descriptors any other than FRAME_END here should
1027         * be treated as error.
1028         */
1029        if (status != GELIC_DESCR_DMA_FRAME_END) {
1030                dev_dbg(ctodev(card), "RX descriptor with state %x\n",
1031                        status);
1032                goto refill;
1033        }
1034
1035        /* ok, we've got a packet in descr */
1036        gelic_net_pass_skb_up(descr, card, netdev);
1037refill:
1038
1039        /* is the current descriptor terminated with next_descr == NULL? */
1040        dmac_chain_ended =
1041                be32_to_cpu(descr->dmac_cmd_status) &
1042                GELIC_DESCR_RX_DMA_CHAIN_END;
1043        /*
1044         * So that always DMAC can see the end
1045         * of the descriptor chain to avoid
1046         * from unwanted DMAC overrun.
1047         */
1048        descr->next_descr_addr = 0;
1049
1050        /* change the descriptor state: */
1051        gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
1052
1053        /*
1054         * this call can fail, but for now, just leave this
1055         * descriptor without skb
1056         */
1057        gelic_descr_prepare_rx(card, descr);
1058
1059        chain->tail = descr;
1060        chain->head = descr->next;
1061
1062        /*
1063         * Set this descriptor the end of the chain.
1064         */
1065        descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
1066
1067        /*
1068         * If dmac chain was met, DMAC stopped.
1069         * thus re-enable it
1070         */
1071
1072        if (dmac_chain_ended)
1073                gelic_card_enable_rxdmac(card);
1074
1075        return 1;
1076}
1077
1078/**
1079 * gelic_net_poll - NAPI poll function called by the stack to return packets
1080 * @napi: napi structure
1081 * @budget: number of packets we can pass to the stack at most
1082 *
1083 * returns the number of the processed packets
1084 *
1085 */
1086static int gelic_net_poll(struct napi_struct *napi, int budget)
1087{
1088        struct gelic_card *card = container_of(napi, struct gelic_card, napi);
1089        int packets_done = 0;
1090
1091        while (packets_done < budget) {
1092                if (!gelic_card_decode_one_descr(card))
1093                        break;
1094
1095                packets_done++;
1096        }
1097
1098        if (packets_done < budget) {
1099                napi_complete_done(napi, packets_done);
1100                gelic_card_rx_irq_on(card);
1101        }
1102        return packets_done;
1103}
1104
1105/**
1106 * gelic_card_interrupt - event handler for gelic_net
1107 */
1108static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
1109{
1110        unsigned long flags;
1111        struct gelic_card *card = ptr;
1112        u64 status;
1113
1114        status = card->irq_status;
1115
1116        if (!status)
1117                return IRQ_NONE;
1118
1119        status &= card->irq_mask;
1120
1121        if (status & GELIC_CARD_RXINT) {
1122                gelic_card_rx_irq_off(card);
1123                napi_schedule(&card->napi);
1124        }
1125
1126        if (status & GELIC_CARD_TXINT) {
1127                spin_lock_irqsave(&card->tx_lock, flags);
1128                card->tx_dma_progress = 0;
1129                gelic_card_release_tx_chain(card, 0);
1130                /* kick outstanding tx descriptor if any */
1131                gelic_card_kick_txdma(card, card->tx_chain.tail);
1132                spin_unlock_irqrestore(&card->tx_lock, flags);
1133        }
1134
1135        /* ether port status changed */
1136        if (status & GELIC_CARD_PORT_STATUS_CHANGED)
1137                gelic_card_get_ether_port_status(card, 1);
1138
1139#ifdef CONFIG_GELIC_WIRELESS
1140        if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
1141                      GELIC_CARD_WLAN_COMMAND_COMPLETED))
1142                gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
1143#endif
1144
1145        return IRQ_HANDLED;
1146}
1147
1148#ifdef CONFIG_NET_POLL_CONTROLLER
1149/**
1150 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1151 * @netdev: interface device structure
1152 *
1153 * see Documentation/networking/netconsole.txt
1154 */
1155void gelic_net_poll_controller(struct net_device *netdev)
1156{
1157        struct gelic_card *card = netdev_card(netdev);
1158
1159        gelic_card_set_irq_mask(card, 0);
1160        gelic_card_interrupt(netdev->irq, netdev);
1161        gelic_card_set_irq_mask(card, card->irq_mask);
1162}
1163#endif /* CONFIG_NET_POLL_CONTROLLER */
1164
1165/**
1166 * gelic_net_open - called upon ifconfig up
1167 * @netdev: interface device structure
1168 *
1169 * returns 0 on success, <0 on failure
1170 *
1171 * gelic_net_open allocates all the descriptors and memory needed for
1172 * operation, sets up multicast list and enables interrupts
1173 */
1174int gelic_net_open(struct net_device *netdev)
1175{
1176        struct gelic_card *card = netdev_card(netdev);
1177
1178        dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
1179
1180        gelic_card_up(card);
1181
1182        netif_start_queue(netdev);
1183        gelic_card_get_ether_port_status(card, 1);
1184
1185        dev_dbg(ctodev(card), " <- %s\n", __func__);
1186        return 0;
1187}
1188
1189void gelic_net_get_drvinfo(struct net_device *netdev,
1190                           struct ethtool_drvinfo *info)
1191{
1192        strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1193        strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1194}
1195
1196static int gelic_ether_get_link_ksettings(struct net_device *netdev,
1197                                          struct ethtool_link_ksettings *cmd)
1198{
1199        struct gelic_card *card = netdev_card(netdev);
1200        u32 supported, advertising;
1201
1202        gelic_card_get_ether_port_status(card, 0);
1203
1204        if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
1205                cmd->base.duplex = DUPLEX_FULL;
1206        else
1207                cmd->base.duplex = DUPLEX_HALF;
1208
1209        switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
1210        case GELIC_LV1_ETHER_SPEED_10:
1211                cmd->base.speed = SPEED_10;
1212                break;
1213        case GELIC_LV1_ETHER_SPEED_100:
1214                cmd->base.speed = SPEED_100;
1215                break;
1216        case GELIC_LV1_ETHER_SPEED_1000:
1217                cmd->base.speed = SPEED_1000;
1218                break;
1219        default:
1220                pr_info("%s: speed unknown\n", __func__);
1221                cmd->base.speed = SPEED_10;
1222                break;
1223        }
1224
1225        supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1226                        SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1227                        SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1228                        SUPPORTED_1000baseT_Full;
1229        advertising = supported;
1230        if (card->link_mode & GELIC_LV1_ETHER_AUTO_NEG) {
1231                cmd->base.autoneg = AUTONEG_ENABLE;
1232        } else {
1233                cmd->base.autoneg = AUTONEG_DISABLE;
1234                advertising &= ~ADVERTISED_Autoneg;
1235        }
1236        cmd->base.port = PORT_TP;
1237
1238        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1239                                                supported);
1240        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1241                                                advertising);
1242
1243        return 0;
1244}
1245
1246static int
1247gelic_ether_set_link_ksettings(struct net_device *netdev,
1248                               const struct ethtool_link_ksettings *cmd)
1249{
1250        struct gelic_card *card = netdev_card(netdev);
1251        u64 mode;
1252        int ret;
1253
1254        if (cmd->base.autoneg == AUTONEG_ENABLE) {
1255                mode = GELIC_LV1_ETHER_AUTO_NEG;
1256        } else {
1257                switch (cmd->base.speed) {
1258                case SPEED_10:
1259                        mode = GELIC_LV1_ETHER_SPEED_10;
1260                        break;
1261                case SPEED_100:
1262                        mode = GELIC_LV1_ETHER_SPEED_100;
1263                        break;
1264                case SPEED_1000:
1265                        mode = GELIC_LV1_ETHER_SPEED_1000;
1266                        break;
1267                default:
1268                        return -EINVAL;
1269                }
1270                if (cmd->base.duplex == DUPLEX_FULL) {
1271                        mode |= GELIC_LV1_ETHER_FULL_DUPLEX;
1272                } else if (cmd->base.speed == SPEED_1000) {
1273                        pr_info("1000 half duplex is not supported.\n");
1274                        return -EINVAL;
1275                }
1276        }
1277
1278        ret = gelic_card_set_link_mode(card, mode);
1279
1280        if (ret)
1281                return ret;
1282
1283        return 0;
1284}
1285
1286static void gelic_net_get_wol(struct net_device *netdev,
1287                              struct ethtool_wolinfo *wol)
1288{
1289        if (0 <= ps3_compare_firmware_version(2, 2, 0))
1290                wol->supported = WAKE_MAGIC;
1291        else
1292                wol->supported = 0;
1293
1294        wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
1295        memset(&wol->sopass, 0, sizeof(wol->sopass));
1296}
1297static int gelic_net_set_wol(struct net_device *netdev,
1298                             struct ethtool_wolinfo *wol)
1299{
1300        int status;
1301        struct gelic_card *card;
1302        u64 v1, v2;
1303
1304        if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
1305            !capable(CAP_NET_ADMIN))
1306                return -EPERM;
1307
1308        if (wol->wolopts & ~WAKE_MAGIC)
1309                return -EINVAL;
1310
1311        card = netdev_card(netdev);
1312        if (wol->wolopts & WAKE_MAGIC) {
1313                status = lv1_net_control(bus_id(card), dev_id(card),
1314                                         GELIC_LV1_SET_WOL,
1315                                         GELIC_LV1_WOL_MAGIC_PACKET,
1316                                         0, GELIC_LV1_WOL_MP_ENABLE,
1317                                         &v1, &v2);
1318                if (status) {
1319                        pr_info("%s: enabling WOL failed %d\n", __func__,
1320                                status);
1321                        status = -EIO;
1322                        goto done;
1323                }
1324                status = lv1_net_control(bus_id(card), dev_id(card),
1325                                         GELIC_LV1_SET_WOL,
1326                                         GELIC_LV1_WOL_ADD_MATCH_ADDR,
1327                                         0, GELIC_LV1_WOL_MATCH_ALL,
1328                                         &v1, &v2);
1329                if (!status)
1330                        ps3_sys_manager_set_wol(1);
1331                else {
1332                        pr_info("%s: enabling WOL filter failed %d\n",
1333                                __func__, status);
1334                        status = -EIO;
1335                }
1336        } else {
1337                status = lv1_net_control(bus_id(card), dev_id(card),
1338                                         GELIC_LV1_SET_WOL,
1339                                         GELIC_LV1_WOL_MAGIC_PACKET,
1340                                         0, GELIC_LV1_WOL_MP_DISABLE,
1341                                         &v1, &v2);
1342                if (status) {
1343                        pr_info("%s: disabling WOL failed %d\n", __func__,
1344                                status);
1345                        status = -EIO;
1346                        goto done;
1347                }
1348                status = lv1_net_control(bus_id(card), dev_id(card),
1349                                         GELIC_LV1_SET_WOL,
1350                                         GELIC_LV1_WOL_DELETE_MATCH_ADDR,
1351                                         0, GELIC_LV1_WOL_MATCH_ALL,
1352                                         &v1, &v2);
1353                if (!status)
1354                        ps3_sys_manager_set_wol(0);
1355                else {
1356                        pr_info("%s: removing WOL filter failed %d\n",
1357                                __func__, status);
1358                        status = -EIO;
1359                }
1360        }
1361done:
1362        return status;
1363}
1364
1365static const struct ethtool_ops gelic_ether_ethtool_ops = {
1366        .get_drvinfo    = gelic_net_get_drvinfo,
1367        .get_link       = ethtool_op_get_link,
1368        .get_wol        = gelic_net_get_wol,
1369        .set_wol        = gelic_net_set_wol,
1370        .get_link_ksettings = gelic_ether_get_link_ksettings,
1371        .set_link_ksettings = gelic_ether_set_link_ksettings,
1372};
1373
1374/**
1375 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1376 * function (to be called not under interrupt status)
1377 * @work: work is context of tx timout task
1378 *
1379 * called as task when tx hangs, resets interface (if interface is up)
1380 */
1381static void gelic_net_tx_timeout_task(struct work_struct *work)
1382{
1383        struct gelic_card *card =
1384                container_of(work, struct gelic_card, tx_timeout_task);
1385        struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1386
1387        dev_info(ctodev(card), "%s:Timed out. Restarting...\n", __func__);
1388
1389        if (!(netdev->flags & IFF_UP))
1390                goto out;
1391
1392        netif_device_detach(netdev);
1393        gelic_net_stop(netdev);
1394
1395        gelic_net_open(netdev);
1396        netif_device_attach(netdev);
1397
1398out:
1399        atomic_dec(&card->tx_timeout_task_counter);
1400}
1401
1402/**
1403 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1404 * @netdev: interface device structure
1405 *
1406 * called, if tx hangs. Schedules a task that resets the interface
1407 */
1408void gelic_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1409{
1410        struct gelic_card *card;
1411
1412        card = netdev_card(netdev);
1413        atomic_inc(&card->tx_timeout_task_counter);
1414        if (netdev->flags & IFF_UP)
1415                schedule_work(&card->tx_timeout_task);
1416        else
1417                atomic_dec(&card->tx_timeout_task_counter);
1418}
1419
1420static const struct net_device_ops gelic_netdevice_ops = {
1421        .ndo_open = gelic_net_open,
1422        .ndo_stop = gelic_net_stop,
1423        .ndo_start_xmit = gelic_net_xmit,
1424        .ndo_set_rx_mode = gelic_net_set_multi,
1425        .ndo_tx_timeout = gelic_net_tx_timeout,
1426        .ndo_set_mac_address = eth_mac_addr,
1427        .ndo_validate_addr = eth_validate_addr,
1428#ifdef CONFIG_NET_POLL_CONTROLLER
1429        .ndo_poll_controller = gelic_net_poll_controller,
1430#endif
1431};
1432
1433/**
1434 * gelic_ether_setup_netdev_ops - initialization of net_device operations
1435 * @netdev: net_device structure
1436 *
1437 * fills out function pointers in the net_device structure
1438 */
1439static void gelic_ether_setup_netdev_ops(struct net_device *netdev,
1440                                         struct napi_struct *napi)
1441{
1442        netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
1443        /* NAPI */
1444        netif_napi_add(netdev, napi, gelic_net_poll, NAPI_POLL_WEIGHT);
1445        netdev->ethtool_ops = &gelic_ether_ethtool_ops;
1446        netdev->netdev_ops = &gelic_netdevice_ops;
1447}
1448
1449/**
1450 * gelic_ether_setup_netdev - initialization of net_device
1451 * @netdev: net_device structure
1452 * @card: card structure
1453 *
1454 * Returns 0 on success or <0 on failure
1455 *
1456 * gelic_ether_setup_netdev initializes the net_device structure
1457 * and register it.
1458 **/
1459int gelic_net_setup_netdev(struct net_device *netdev, struct gelic_card *card)
1460{
1461        int status;
1462        u64 v1, v2;
1463
1464        netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1465
1466        netdev->features = NETIF_F_IP_CSUM;
1467        if (GELIC_CARD_RX_CSUM_DEFAULT)
1468                netdev->features |= NETIF_F_RXCSUM;
1469
1470        status = lv1_net_control(bus_id(card), dev_id(card),
1471                                 GELIC_LV1_GET_MAC_ADDRESS,
1472                                 0, 0, 0, &v1, &v2);
1473        v1 <<= 16;
1474        if (status || !is_valid_ether_addr((u8 *)&v1)) {
1475                dev_info(ctodev(card),
1476                         "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
1477                         __func__, status);
1478                return -EINVAL;
1479        }
1480        memcpy(netdev->dev_addr, &v1, ETH_ALEN);
1481
1482        if (card->vlan_required) {
1483                netdev->hard_header_len += VLAN_HLEN;
1484                /*
1485                 * As vlan is internally used,
1486                 * we can not receive vlan packets
1487                 */
1488                netdev->features |= NETIF_F_VLAN_CHALLENGED;
1489        }
1490
1491        /* MTU range: 64 - 1518 */
1492        netdev->min_mtu = GELIC_NET_MIN_MTU;
1493        netdev->max_mtu = GELIC_NET_MAX_MTU;
1494
1495        status = register_netdev(netdev);
1496        if (status) {
1497                dev_err(ctodev(card), "%s:Couldn't register %s %d\n",
1498                        __func__, netdev->name, status);
1499                return status;
1500        }
1501        dev_info(ctodev(card), "%s: MAC addr %pM\n",
1502                 netdev->name, netdev->dev_addr);
1503
1504        return 0;
1505}
1506
1507/**
1508 * gelic_alloc_card_net - allocates net_device and card structure
1509 *
1510 * returns the card structure or NULL in case of errors
1511 *
1512 * the card and net_device structures are linked to each other
1513 */
1514#define GELIC_ALIGN (32)
1515static struct gelic_card *gelic_alloc_card_net(struct net_device **netdev)
1516{
1517        struct gelic_card *card;
1518        struct gelic_port *port;
1519        void *p;
1520        size_t alloc_size;
1521        /*
1522         * gelic requires dma descriptor is 32 bytes aligned and
1523         * the hypervisor requires irq_status is 8 bytes aligned.
1524         */
1525        BUILD_BUG_ON(offsetof(struct gelic_card, irq_status) % 8);
1526        BUILD_BUG_ON(offsetof(struct gelic_card, descr) % 32);
1527        alloc_size =
1528                sizeof(struct gelic_card) +
1529                sizeof(struct gelic_descr) * GELIC_NET_RX_DESCRIPTORS +
1530                sizeof(struct gelic_descr) * GELIC_NET_TX_DESCRIPTORS +
1531                GELIC_ALIGN - 1;
1532
1533        p  = kzalloc(alloc_size, GFP_KERNEL);
1534        if (!p)
1535                return NULL;
1536        card = PTR_ALIGN(p, GELIC_ALIGN);
1537        card->unalign = p;
1538
1539        /*
1540         * alloc netdev
1541         */
1542        *netdev = alloc_etherdev(sizeof(struct gelic_port));
1543        if (!*netdev) {
1544                kfree(card->unalign);
1545                return NULL;
1546        }
1547        port = netdev_priv(*netdev);
1548
1549        /* gelic_port */
1550        port->netdev = *netdev;
1551        port->card = card;
1552        port->type = GELIC_PORT_ETHERNET_0;
1553
1554        /* gelic_card */
1555        card->netdev[GELIC_PORT_ETHERNET_0] = *netdev;
1556
1557        INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
1558        init_waitqueue_head(&card->waitq);
1559        atomic_set(&card->tx_timeout_task_counter, 0);
1560        mutex_init(&card->updown_lock);
1561        atomic_set(&card->users, 0);
1562
1563        return card;
1564}
1565
1566static void gelic_card_get_vlan_info(struct gelic_card *card)
1567{
1568        u64 v1, v2;
1569        int status;
1570        unsigned int i;
1571        struct {
1572                int tx;
1573                int rx;
1574        } vlan_id_ix[2] = {
1575                [GELIC_PORT_ETHERNET_0] = {
1576                        .tx = GELIC_LV1_VLAN_TX_ETHERNET_0,
1577                        .rx = GELIC_LV1_VLAN_RX_ETHERNET_0
1578                },
1579                [GELIC_PORT_WIRELESS] = {
1580                        .tx = GELIC_LV1_VLAN_TX_WIRELESS,
1581                        .rx = GELIC_LV1_VLAN_RX_WIRELESS
1582                }
1583        };
1584
1585        for (i = 0; i < ARRAY_SIZE(vlan_id_ix); i++) {
1586                /* tx tag */
1587                status = lv1_net_control(bus_id(card), dev_id(card),
1588                                         GELIC_LV1_GET_VLAN_ID,
1589                                         vlan_id_ix[i].tx,
1590                                         0, 0, &v1, &v2);
1591                if (status || !v1) {
1592                        if (status != LV1_NO_ENTRY)
1593                                dev_dbg(ctodev(card),
1594                                        "get vlan id for tx(%d) failed(%d)\n",
1595                                        vlan_id_ix[i].tx, status);
1596                        card->vlan[i].tx = 0;
1597                        card->vlan[i].rx = 0;
1598                        continue;
1599                }
1600                card->vlan[i].tx = (u16)v1;
1601
1602                /* rx tag */
1603                status = lv1_net_control(bus_id(card), dev_id(card),
1604                                         GELIC_LV1_GET_VLAN_ID,
1605                                         vlan_id_ix[i].rx,
1606                                         0, 0, &v1, &v2);
1607                if (status || !v1) {
1608                        if (status != LV1_NO_ENTRY)
1609                                dev_info(ctodev(card),
1610                                         "get vlan id for rx(%d) failed(%d)\n",
1611                                         vlan_id_ix[i].rx, status);
1612                        card->vlan[i].tx = 0;
1613                        card->vlan[i].rx = 0;
1614                        continue;
1615                }
1616                card->vlan[i].rx = (u16)v1;
1617
1618                dev_dbg(ctodev(card), "vlan_id[%d] tx=%02x rx=%02x\n",
1619                        i, card->vlan[i].tx, card->vlan[i].rx);
1620        }
1621
1622        if (card->vlan[GELIC_PORT_ETHERNET_0].tx) {
1623                BUG_ON(!card->vlan[GELIC_PORT_WIRELESS].tx);
1624                card->vlan_required = 1;
1625        } else
1626                card->vlan_required = 0;
1627
1628        /* check wirelss capable firmware */
1629        if (ps3_compare_firmware_version(1, 6, 0) < 0) {
1630                card->vlan[GELIC_PORT_WIRELESS].tx = 0;
1631                card->vlan[GELIC_PORT_WIRELESS].rx = 0;
1632        }
1633
1634        dev_info(ctodev(card), "internal vlan %s\n",
1635                 card->vlan_required? "enabled" : "disabled");
1636}
1637/**
1638 * ps3_gelic_driver_probe - add a device to the control of this driver
1639 */
1640static int ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
1641{
1642        struct gelic_card *card;
1643        struct net_device *netdev;
1644        int result;
1645
1646        pr_debug("%s: called\n", __func__);
1647
1648        udbg_shutdown_ps3gelic();
1649
1650        result = ps3_open_hv_device(dev);
1651
1652        if (result) {
1653                dev_dbg(&dev->core, "%s:ps3_open_hv_device failed\n",
1654                        __func__);
1655                goto fail_open;
1656        }
1657
1658        result = ps3_dma_region_create(dev->d_region);
1659
1660        if (result) {
1661                dev_dbg(&dev->core, "%s:ps3_dma_region_create failed(%d)\n",
1662                        __func__, result);
1663                BUG_ON("check region type");
1664                goto fail_dma_region;
1665        }
1666
1667        /* alloc card/netdevice */
1668        card = gelic_alloc_card_net(&netdev);
1669        if (!card) {
1670                dev_info(&dev->core, "%s:gelic_net_alloc_card failed\n",
1671                         __func__);
1672                result = -ENOMEM;
1673                goto fail_alloc_card;
1674        }
1675        ps3_system_bus_set_drvdata(dev, card);
1676        card->dev = dev;
1677
1678        /* get internal vlan info */
1679        gelic_card_get_vlan_info(card);
1680
1681        card->link_mode = GELIC_LV1_ETHER_AUTO_NEG;
1682
1683        /* setup interrupt */
1684        result = lv1_net_set_interrupt_status_indicator(bus_id(card),
1685                                                        dev_id(card),
1686                ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
1687                0);
1688
1689        if (result) {
1690                dev_dbg(&dev->core,
1691                        "%s:set_interrupt_status_indicator failed: %s\n",
1692                        __func__, ps3_result(result));
1693                result = -EIO;
1694                goto fail_status_indicator;
1695        }
1696
1697        result = ps3_sb_event_receive_port_setup(dev, PS3_BINDING_CPU_ANY,
1698                &card->irq);
1699
1700        if (result) {
1701                dev_info(ctodev(card),
1702                         "%s:gelic_net_open_device failed (%d)\n",
1703                         __func__, result);
1704                result = -EPERM;
1705                goto fail_alloc_irq;
1706        }
1707        result = request_irq(card->irq, gelic_card_interrupt,
1708                             0, netdev->name, card);
1709
1710        if (result) {
1711                dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
1712                        __func__, result);
1713                goto fail_request_irq;
1714        }
1715
1716        /* setup card structure */
1717        card->irq_mask = GELIC_CARD_RXINT | GELIC_CARD_TXINT |
1718                GELIC_CARD_PORT_STATUS_CHANGED;
1719
1720
1721        result = gelic_card_init_chain(card, &card->tx_chain,
1722                                       card->descr, GELIC_NET_TX_DESCRIPTORS);
1723        if (result)
1724                goto fail_alloc_tx;
1725        result = gelic_card_init_chain(card, &card->rx_chain,
1726                                       card->descr + GELIC_NET_TX_DESCRIPTORS,
1727                                       GELIC_NET_RX_DESCRIPTORS);
1728        if (result)
1729                goto fail_alloc_rx;
1730
1731        /* head of chain */
1732        card->tx_top = card->tx_chain.head;
1733        card->rx_top = card->rx_chain.head;
1734        dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
1735                card->rx_top, card->tx_top, sizeof(struct gelic_descr),
1736                GELIC_NET_RX_DESCRIPTORS);
1737        /* allocate rx skbs */
1738        result = gelic_card_alloc_rx_skbs(card);
1739        if (result)
1740                goto fail_alloc_skbs;
1741
1742        spin_lock_init(&card->tx_lock);
1743        card->tx_dma_progress = 0;
1744
1745        /* setup net_device structure */
1746        netdev->irq = card->irq;
1747        SET_NETDEV_DEV(netdev, &card->dev->core);
1748        gelic_ether_setup_netdev_ops(netdev, &card->napi);
1749        result = gelic_net_setup_netdev(netdev, card);
1750        if (result) {
1751                dev_dbg(&dev->core, "%s: setup_netdev failed %d\n",
1752                        __func__, result);
1753                goto fail_setup_netdev;
1754        }
1755
1756#ifdef CONFIG_GELIC_WIRELESS
1757        result = gelic_wl_driver_probe(card);
1758        if (result) {
1759                dev_dbg(&dev->core, "%s: WL init failed\n", __func__);
1760                goto fail_setup_netdev;
1761        }
1762#endif
1763        pr_debug("%s: done\n", __func__);
1764        return 0;
1765
1766fail_setup_netdev:
1767fail_alloc_skbs:
1768        gelic_card_free_chain(card, card->rx_chain.head);
1769fail_alloc_rx:
1770        gelic_card_free_chain(card, card->tx_chain.head);
1771fail_alloc_tx:
1772        free_irq(card->irq, card);
1773        netdev->irq = 0;
1774fail_request_irq:
1775        ps3_sb_event_receive_port_destroy(dev, card->irq);
1776fail_alloc_irq:
1777        lv1_net_set_interrupt_status_indicator(bus_id(card),
1778                                               bus_id(card),
1779                                               0, 0);
1780fail_status_indicator:
1781        ps3_system_bus_set_drvdata(dev, NULL);
1782        kfree(netdev_card(netdev)->unalign);
1783        free_netdev(netdev);
1784fail_alloc_card:
1785        ps3_dma_region_free(dev->d_region);
1786fail_dma_region:
1787        ps3_close_hv_device(dev);
1788fail_open:
1789        return result;
1790}
1791
1792/**
1793 * ps3_gelic_driver_remove - remove a device from the control of this driver
1794 */
1795
1796static int ps3_gelic_driver_remove(struct ps3_system_bus_device *dev)
1797{
1798        struct gelic_card *card = ps3_system_bus_get_drvdata(dev);
1799        struct net_device *netdev0;
1800        pr_debug("%s: called\n", __func__);
1801
1802        /* set auto-negotiation */
1803        gelic_card_set_link_mode(card, GELIC_LV1_ETHER_AUTO_NEG);
1804
1805#ifdef CONFIG_GELIC_WIRELESS
1806        gelic_wl_driver_remove(card);
1807#endif
1808        /* stop interrupt */
1809        gelic_card_set_irq_mask(card, 0);
1810
1811        /* turn off DMA, force end */
1812        gelic_card_disable_rxdmac(card);
1813        gelic_card_disable_txdmac(card);
1814
1815        /* release chains */
1816        gelic_card_release_tx_chain(card, 1);
1817        gelic_card_release_rx_chain(card);
1818
1819        gelic_card_free_chain(card, card->tx_top);
1820        gelic_card_free_chain(card, card->rx_top);
1821
1822        netdev0 = card->netdev[GELIC_PORT_ETHERNET_0];
1823        /* disconnect event port */
1824        free_irq(card->irq, card);
1825        netdev0->irq = 0;
1826        ps3_sb_event_receive_port_destroy(card->dev, card->irq);
1827
1828        wait_event(card->waitq,
1829                   atomic_read(&card->tx_timeout_task_counter) == 0);
1830
1831        lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
1832                                               0 , 0);
1833
1834        unregister_netdev(netdev0);
1835        kfree(netdev_card(netdev0)->unalign);
1836        free_netdev(netdev0);
1837
1838        ps3_system_bus_set_drvdata(dev, NULL);
1839
1840        ps3_dma_region_free(dev->d_region);
1841
1842        ps3_close_hv_device(dev);
1843
1844        pr_debug("%s: done\n", __func__);
1845        return 0;
1846}
1847
1848static struct ps3_system_bus_driver ps3_gelic_driver = {
1849        .match_id = PS3_MATCH_ID_GELIC,
1850        .probe = ps3_gelic_driver_probe,
1851        .remove = ps3_gelic_driver_remove,
1852        .shutdown = ps3_gelic_driver_remove,
1853        .core.name = "ps3_gelic_driver",
1854        .core.owner = THIS_MODULE,
1855};
1856
1857static int __init ps3_gelic_driver_init (void)
1858{
1859        return firmware_has_feature(FW_FEATURE_PS3_LV1)
1860                ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1861                : -ENODEV;
1862}
1863
1864static void __exit ps3_gelic_driver_exit (void)
1865{
1866        ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1867}
1868
1869module_init(ps3_gelic_driver_init);
1870module_exit(ps3_gelic_driver_exit);
1871
1872MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1873
1874