linux/drivers/net/ethernet/neterion/vxge/vxge-main.c
<<
>>
Prefs
   1/******************************************************************************
   2* This software may be used and distributed according to the terms of
   3* the GNU General Public License (GPL), incorporated herein by reference.
   4* Drivers based on or derived from this code fall under the GPL and must
   5* retain the authorship, copyright and license notice.  This file is not
   6* a complete program and may only be used when the entire operating
   7* system is licensed under the GPL.
   8* See the file COPYING in this distribution for more information.
   9*
  10* vxge-main.c: Driver for Exar Corp's X3100 Series 10GbE PCIe I/O
  11*              Virtualized Server Adapter.
  12* Copyright(c) 2002-2010 Exar Corp.
  13*
  14* The module loadable parameters that are supported by the driver and a brief
  15* explanation of all the variables:
  16* vlan_tag_strip:
  17*       Strip VLAN Tag enable/disable. Instructs the device to remove
  18*       the VLAN tag from all received tagged frames that are not
  19*       replicated at the internal L2 switch.
  20*               0 - Do not strip the VLAN tag.
  21*               1 - Strip the VLAN tag.
  22*
  23* addr_learn_en:
  24*       Enable learning the mac address of the guest OS interface in
  25*       a virtualization environment.
  26*               0 - DISABLE
  27*               1 - ENABLE
  28*
  29* max_config_port:
  30*       Maximum number of port to be supported.
  31*               MIN -1 and MAX - 2
  32*
  33* max_config_vpath:
  34*       This configures the maximum no of VPATH configures for each
  35*       device function.
  36*               MIN - 1 and MAX - 17
  37*
  38* max_config_dev:
  39*       This configures maximum no of Device function to be enabled.
  40*               MIN - 1 and MAX - 17
  41*
  42******************************************************************************/
  43
  44#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  45
  46#include <linux/bitops.h>
  47#include <linux/if_vlan.h>
  48#include <linux/interrupt.h>
  49#include <linux/pci.h>
  50#include <linux/slab.h>
  51#include <linux/tcp.h>
  52#include <net/ip.h>
  53#include <linux/netdevice.h>
  54#include <linux/etherdevice.h>
  55#include <linux/firmware.h>
  56#include <linux/net_tstamp.h>
  57#include <linux/prefetch.h>
  58#include <linux/module.h>
  59#include "vxge-main.h"
  60#include "vxge-reg.h"
  61
  62MODULE_LICENSE("Dual BSD/GPL");
  63MODULE_DESCRIPTION("Neterion's X3100 Series 10GbE PCIe I/O"
  64        "Virtualized Server Adapter");
  65
  66static const struct pci_device_id vxge_id_table[] = {
  67        {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_TITAN_WIN, PCI_ANY_ID,
  68        PCI_ANY_ID},
  69        {PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_TITAN_UNI, PCI_ANY_ID,
  70        PCI_ANY_ID},
  71        {0}
  72};
  73
  74MODULE_DEVICE_TABLE(pci, vxge_id_table);
  75
  76VXGE_MODULE_PARAM_INT(vlan_tag_strip, VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_ENABLE);
  77VXGE_MODULE_PARAM_INT(addr_learn_en, VXGE_HW_MAC_ADDR_LEARN_DEFAULT);
  78VXGE_MODULE_PARAM_INT(max_config_port, VXGE_MAX_CONFIG_PORT);
  79VXGE_MODULE_PARAM_INT(max_config_vpath, VXGE_USE_DEFAULT);
  80VXGE_MODULE_PARAM_INT(max_mac_vpath, VXGE_MAX_MAC_ADDR_COUNT);
  81VXGE_MODULE_PARAM_INT(max_config_dev, VXGE_MAX_CONFIG_DEV);
  82
  83static u16 vpath_selector[VXGE_HW_MAX_VIRTUAL_PATHS] =
  84                {0, 1, 3, 3, 7, 7, 7, 7, 15, 15, 15, 15, 15, 15, 15, 15, 31};
  85static unsigned int bw_percentage[VXGE_HW_MAX_VIRTUAL_PATHS] =
  86        {[0 ...(VXGE_HW_MAX_VIRTUAL_PATHS - 1)] = 0xFF};
  87module_param_array(bw_percentage, uint, NULL, 0);
  88
  89static struct vxge_drv_config *driver_config;
  90static enum vxge_hw_status vxge_reset_all_vpaths(struct vxgedev *vdev);
  91
  92static inline int is_vxge_card_up(struct vxgedev *vdev)
  93{
  94        return test_bit(__VXGE_STATE_CARD_UP, &vdev->state);
  95}
  96
  97static inline void VXGE_COMPLETE_VPATH_TX(struct vxge_fifo *fifo)
  98{
  99        struct sk_buff **skb_ptr = NULL;
 100        struct sk_buff **temp;
 101#define NR_SKB_COMPLETED 128
 102        struct sk_buff *completed[NR_SKB_COMPLETED];
 103        int more;
 104
 105        do {
 106                more = 0;
 107                skb_ptr = completed;
 108
 109                if (__netif_tx_trylock(fifo->txq)) {
 110                        vxge_hw_vpath_poll_tx(fifo->handle, &skb_ptr,
 111                                                NR_SKB_COMPLETED, &more);
 112                        __netif_tx_unlock(fifo->txq);
 113                }
 114
 115                /* free SKBs */
 116                for (temp = completed; temp != skb_ptr; temp++)
 117                        dev_kfree_skb_irq(*temp);
 118        } while (more);
 119}
 120
 121static inline void VXGE_COMPLETE_ALL_TX(struct vxgedev *vdev)
 122{
 123        int i;
 124
 125        /* Complete all transmits */
 126        for (i = 0; i < vdev->no_of_vpath; i++)
 127                VXGE_COMPLETE_VPATH_TX(&vdev->vpaths[i].fifo);
 128}
 129
 130static inline void VXGE_COMPLETE_ALL_RX(struct vxgedev *vdev)
 131{
 132        int i;
 133        struct vxge_ring *ring;
 134
 135        /* Complete all receives*/
 136        for (i = 0; i < vdev->no_of_vpath; i++) {
 137                ring = &vdev->vpaths[i].ring;
 138                vxge_hw_vpath_poll_rx(ring->handle);
 139        }
 140}
 141
 142/*
 143 * vxge_callback_link_up
 144 *
 145 * This function is called during interrupt context to notify link up state
 146 * change.
 147 */
 148static void vxge_callback_link_up(struct __vxge_hw_device *hldev)
 149{
 150        struct net_device *dev = hldev->ndev;
 151        struct vxgedev *vdev = netdev_priv(dev);
 152
 153        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
 154                vdev->ndev->name, __func__, __LINE__);
 155        netdev_notice(vdev->ndev, "Link Up\n");
 156        vdev->stats.link_up++;
 157
 158        netif_carrier_on(vdev->ndev);
 159        netif_tx_wake_all_queues(vdev->ndev);
 160
 161        vxge_debug_entryexit(VXGE_TRACE,
 162                "%s: %s:%d Exiting...", vdev->ndev->name, __func__, __LINE__);
 163}
 164
 165/*
 166 * vxge_callback_link_down
 167 *
 168 * This function is called during interrupt context to notify link down state
 169 * change.
 170 */
 171static void vxge_callback_link_down(struct __vxge_hw_device *hldev)
 172{
 173        struct net_device *dev = hldev->ndev;
 174        struct vxgedev *vdev = netdev_priv(dev);
 175
 176        vxge_debug_entryexit(VXGE_TRACE,
 177                "%s: %s:%d", vdev->ndev->name, __func__, __LINE__);
 178        netdev_notice(vdev->ndev, "Link Down\n");
 179
 180        vdev->stats.link_down++;
 181        netif_carrier_off(vdev->ndev);
 182        netif_tx_stop_all_queues(vdev->ndev);
 183
 184        vxge_debug_entryexit(VXGE_TRACE,
 185                "%s: %s:%d Exiting...", vdev->ndev->name, __func__, __LINE__);
 186}
 187
 188/*
 189 * vxge_rx_alloc
 190 *
 191 * Allocate SKB.
 192 */
 193static struct sk_buff *
 194vxge_rx_alloc(void *dtrh, struct vxge_ring *ring, const int skb_size)
 195{
 196        struct net_device    *dev;
 197        struct sk_buff       *skb;
 198        struct vxge_rx_priv *rx_priv;
 199
 200        dev = ring->ndev;
 201        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
 202                ring->ndev->name, __func__, __LINE__);
 203
 204        rx_priv = vxge_hw_ring_rxd_private_get(dtrh);
 205
 206        /* try to allocate skb first. this one may fail */
 207        skb = netdev_alloc_skb(dev, skb_size +
 208        VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);
 209        if (skb == NULL) {
 210                vxge_debug_mem(VXGE_ERR,
 211                        "%s: out of memory to allocate SKB", dev->name);
 212                ring->stats.skb_alloc_fail++;
 213                return NULL;
 214        }
 215
 216        vxge_debug_mem(VXGE_TRACE,
 217                "%s: %s:%d  Skb : 0x%p", ring->ndev->name,
 218                __func__, __LINE__, skb);
 219
 220        skb_reserve(skb, VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);
 221
 222        rx_priv->skb = skb;
 223        rx_priv->skb_data = NULL;
 224        rx_priv->data_size = skb_size;
 225        vxge_debug_entryexit(VXGE_TRACE,
 226                "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);
 227
 228        return skb;
 229}
 230
 231/*
 232 * vxge_rx_map
 233 */
 234static int vxge_rx_map(void *dtrh, struct vxge_ring *ring)
 235{
 236        struct vxge_rx_priv *rx_priv;
 237        dma_addr_t dma_addr;
 238
 239        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
 240                ring->ndev->name, __func__, __LINE__);
 241        rx_priv = vxge_hw_ring_rxd_private_get(dtrh);
 242
 243        rx_priv->skb_data = rx_priv->skb->data;
 244        dma_addr = pci_map_single(ring->pdev, rx_priv->skb_data,
 245                                rx_priv->data_size, PCI_DMA_FROMDEVICE);
 246
 247        if (unlikely(pci_dma_mapping_error(ring->pdev, dma_addr))) {
 248                ring->stats.pci_map_fail++;
 249                return -EIO;
 250        }
 251        vxge_debug_mem(VXGE_TRACE,
 252                "%s: %s:%d  1 buffer mode dma_addr = 0x%llx",
 253                ring->ndev->name, __func__, __LINE__,
 254                (unsigned long long)dma_addr);
 255        vxge_hw_ring_rxd_1b_set(dtrh, dma_addr, rx_priv->data_size);
 256
 257        rx_priv->data_dma = dma_addr;
 258        vxge_debug_entryexit(VXGE_TRACE,
 259                "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);
 260
 261        return 0;
 262}
 263
 264/*
 265 * vxge_rx_initial_replenish
 266 * Allocation of RxD as an initial replenish procedure.
 267 */
 268static enum vxge_hw_status
 269vxge_rx_initial_replenish(void *dtrh, void *userdata)
 270{
 271        struct vxge_ring *ring = (struct vxge_ring *)userdata;
 272        struct vxge_rx_priv *rx_priv;
 273
 274        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
 275                ring->ndev->name, __func__, __LINE__);
 276        if (vxge_rx_alloc(dtrh, ring,
 277                          VXGE_LL_MAX_FRAME_SIZE(ring->ndev)) == NULL)
 278                return VXGE_HW_FAIL;
 279
 280        if (vxge_rx_map(dtrh, ring)) {
 281                rx_priv = vxge_hw_ring_rxd_private_get(dtrh);
 282                dev_kfree_skb(rx_priv->skb);
 283
 284                return VXGE_HW_FAIL;
 285        }
 286        vxge_debug_entryexit(VXGE_TRACE,
 287                "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);
 288
 289        return VXGE_HW_OK;
 290}
 291
 292static inline void
 293vxge_rx_complete(struct vxge_ring *ring, struct sk_buff *skb, u16 vlan,
 294                 int pkt_length, struct vxge_hw_ring_rxd_info *ext_info)
 295{
 296
 297        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
 298                        ring->ndev->name, __func__, __LINE__);
 299        skb_record_rx_queue(skb, ring->driver_id);
 300        skb->protocol = eth_type_trans(skb, ring->ndev);
 301
 302        u64_stats_update_begin(&ring->stats.syncp);
 303        ring->stats.rx_frms++;
 304        ring->stats.rx_bytes += pkt_length;
 305
 306        if (skb->pkt_type == PACKET_MULTICAST)
 307                ring->stats.rx_mcast++;
 308        u64_stats_update_end(&ring->stats.syncp);
 309
 310        vxge_debug_rx(VXGE_TRACE,
 311                "%s: %s:%d  skb protocol = %d",
 312                ring->ndev->name, __func__, __LINE__, skb->protocol);
 313
 314        if (ext_info->vlan &&
 315            ring->vlan_tag_strip == VXGE_HW_VPATH_RPA_STRIP_VLAN_TAG_ENABLE)
 316                __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), ext_info->vlan);
 317        napi_gro_receive(ring->napi_p, skb);
 318
 319        vxge_debug_entryexit(VXGE_TRACE,
 320                "%s: %s:%d Exiting...", ring->ndev->name, __func__, __LINE__);
 321}
 322
 323static inline void vxge_re_pre_post(void *dtr, struct vxge_ring *ring,
 324                                    struct vxge_rx_priv *rx_priv)
 325{
 326        pci_dma_sync_single_for_device(ring->pdev,
 327                rx_priv->data_dma, rx_priv->data_size, PCI_DMA_FROMDEVICE);
 328
 329        vxge_hw_ring_rxd_1b_set(dtr, rx_priv->data_dma, rx_priv->data_size);
 330        vxge_hw_ring_rxd_pre_post(ring->handle, dtr);
 331}
 332
 333static inline void vxge_post(int *dtr_cnt, void **first_dtr,
 334                             void *post_dtr, struct __vxge_hw_ring *ringh)
 335{
 336        int dtr_count = *dtr_cnt;
 337        if ((*dtr_cnt % VXGE_HW_RXSYNC_FREQ_CNT) == 0) {
 338                if (*first_dtr)
 339                        vxge_hw_ring_rxd_post_post_wmb(ringh, *first_dtr);
 340                *first_dtr = post_dtr;
 341        } else
 342                vxge_hw_ring_rxd_post_post(ringh, post_dtr);
 343        dtr_count++;
 344        *dtr_cnt = dtr_count;
 345}
 346
 347/*
 348 * vxge_rx_1b_compl
 349 *
 350 * If the interrupt is because of a received frame or if the receive ring
 351 * contains fresh as yet un-processed frames, this function is called.
 352 */
 353static enum vxge_hw_status
 354vxge_rx_1b_compl(struct __vxge_hw_ring *ringh, void *dtr,
 355                 u8 t_code, void *userdata)
 356{
 357        struct vxge_ring *ring = (struct vxge_ring *)userdata;
 358        struct net_device *dev = ring->ndev;
 359        unsigned int dma_sizes;
 360        void *first_dtr = NULL;
 361        int dtr_cnt = 0;
 362        int data_size;
 363        dma_addr_t data_dma;
 364        int pkt_length;
 365        struct sk_buff *skb;
 366        struct vxge_rx_priv *rx_priv;
 367        struct vxge_hw_ring_rxd_info ext_info;
 368        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
 369                ring->ndev->name, __func__, __LINE__);
 370
 371        if (ring->budget <= 0)
 372                goto out;
 373
 374        do {
 375                prefetch((char *)dtr + L1_CACHE_BYTES);
 376                rx_priv = vxge_hw_ring_rxd_private_get(dtr);
 377                skb = rx_priv->skb;
 378                data_size = rx_priv->data_size;
 379                data_dma = rx_priv->data_dma;
 380                prefetch(rx_priv->skb_data);
 381
 382                vxge_debug_rx(VXGE_TRACE,
 383                        "%s: %s:%d  skb = 0x%p",
 384                        ring->ndev->name, __func__, __LINE__, skb);
 385
 386                vxge_hw_ring_rxd_1b_get(ringh, dtr, &dma_sizes);
 387                pkt_length = dma_sizes;
 388
 389                pkt_length -= ETH_FCS_LEN;
 390
 391                vxge_debug_rx(VXGE_TRACE,
 392                        "%s: %s:%d  Packet Length = %d",
 393                        ring->ndev->name, __func__, __LINE__, pkt_length);
 394
 395                vxge_hw_ring_rxd_1b_info_get(ringh, dtr, &ext_info);
 396
 397                /* check skb validity */
 398                vxge_assert(skb);
 399
 400                prefetch((char *)skb + L1_CACHE_BYTES);
 401                if (unlikely(t_code)) {
 402                        if (vxge_hw_ring_handle_tcode(ringh, dtr, t_code) !=
 403                                VXGE_HW_OK) {
 404
 405                                ring->stats.rx_errors++;
 406                                vxge_debug_rx(VXGE_TRACE,
 407                                        "%s: %s :%d Rx T_code is %d",
 408                                        ring->ndev->name, __func__,
 409                                        __LINE__, t_code);
 410
 411                                /* If the t_code is not supported and if the
 412                                 * t_code is other than 0x5 (unparseable packet
 413                                 * such as unknown UPV6 header), Drop it !!!
 414                                 */
 415                                vxge_re_pre_post(dtr, ring, rx_priv);
 416
 417                                vxge_post(&dtr_cnt, &first_dtr, dtr, ringh);
 418                                ring->stats.rx_dropped++;
 419                                continue;
 420                        }
 421                }
 422
 423                if (pkt_length > VXGE_LL_RX_COPY_THRESHOLD) {
 424                        if (vxge_rx_alloc(dtr, ring, data_size) != NULL) {
 425                                if (!vxge_rx_map(dtr, ring)) {
 426                                        skb_put(skb, pkt_length);
 427
 428                                        pci_unmap_single(ring->pdev, data_dma,
 429                                                data_size, PCI_DMA_FROMDEVICE);
 430
 431                                        vxge_hw_ring_rxd_pre_post(ringh, dtr);
 432                                        vxge_post(&dtr_cnt, &first_dtr, dtr,
 433                                                ringh);
 434                                } else {
 435                                        dev_kfree_skb(rx_priv->skb);
 436                                        rx_priv->skb = skb;
 437                                        rx_priv->data_size = data_size;
 438                                        vxge_re_pre_post(dtr, ring, rx_priv);
 439
 440                                        vxge_post(&dtr_cnt, &first_dtr, dtr,
 441                                                ringh);
 442                                        ring->stats.rx_dropped++;
 443                                        break;
 444                                }
 445                        } else {
 446                                vxge_re_pre_post(dtr, ring, rx_priv);
 447
 448                                vxge_post(&dtr_cnt, &first_dtr, dtr, ringh);
 449                                ring->stats.rx_dropped++;
 450                                break;
 451                        }
 452                } else {
 453                        struct sk_buff *skb_up;
 454
 455                        skb_up = netdev_alloc_skb(dev, pkt_length +
 456                                VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);
 457                        if (skb_up != NULL) {
 458                                skb_reserve(skb_up,
 459                                    VXGE_HW_HEADER_ETHERNET_II_802_3_ALIGN);
 460
 461                                pci_dma_sync_single_for_cpu(ring->pdev,
 462                                        data_dma, data_size,
 463                                        PCI_DMA_FROMDEVICE);
 464
 465                                vxge_debug_mem(VXGE_TRACE,
 466                                        "%s: %s:%d  skb_up = %p",
 467                                        ring->ndev->name, __func__,
 468                                        __LINE__, skb);
 469                                memcpy(skb_up->data, skb->data, pkt_length);
 470
 471                                vxge_re_pre_post(dtr, ring, rx_priv);
 472
 473                                vxge_post(&dtr_cnt, &first_dtr, dtr,
 474                                        ringh);
 475                                /* will netif_rx small SKB instead */
 476                                skb = skb_up;
 477                                skb_put(skb, pkt_length);
 478                        } else {
 479                                vxge_re_pre_post(dtr, ring, rx_priv);
 480
 481                                vxge_post(&dtr_cnt, &first_dtr, dtr, ringh);
 482                                vxge_debug_rx(VXGE_ERR,
 483                                        "%s: vxge_rx_1b_compl: out of "
 484                                        "memory", dev->name);
 485                                ring->stats.skb_alloc_fail++;
 486                                break;
 487                        }
 488                }
 489
 490                if ((ext_info.proto & VXGE_HW_FRAME_PROTO_TCP_OR_UDP) &&
 491                    !(ext_info.proto & VXGE_HW_FRAME_PROTO_IP_FRAG) &&
 492                    (dev->features & NETIF_F_RXCSUM) && /* Offload Rx side CSUM */
 493                    ext_info.l3_cksum == VXGE_HW_L3_CKSUM_OK &&
 494                    ext_info.l4_cksum == VXGE_HW_L4_CKSUM_OK)
 495                        skb->ip_summed = CHECKSUM_UNNECESSARY;
 496                else
 497                        skb_checksum_none_assert(skb);
 498
 499
 500                if (ring->rx_hwts) {
 501                        struct skb_shared_hwtstamps *skb_hwts;
 502                        u32 ns = *(u32 *)(skb->head + pkt_length);
 503
 504                        skb_hwts = skb_hwtstamps(skb);
 505                        skb_hwts->hwtstamp = ns_to_ktime(ns);
 506                }
 507
 508                /* rth_hash_type and rth_it_hit are non-zero regardless of
 509                 * whether rss is enabled.  Only the rth_value is zero/non-zero
 510                 * if rss is disabled/enabled, so key off of that.
 511                 */
 512                if (ext_info.rth_value)
 513                        skb_set_hash(skb, ext_info.rth_value,
 514                                     PKT_HASH_TYPE_L3);
 515
 516                vxge_rx_complete(ring, skb, ext_info.vlan,
 517                        pkt_length, &ext_info);
 518
 519                ring->budget--;
 520                ring->pkts_processed++;
 521                if (!ring->budget)
 522                        break;
 523
 524        } while (vxge_hw_ring_rxd_next_completed(ringh, &dtr,
 525                &t_code) == VXGE_HW_OK);
 526
 527        if (first_dtr)
 528                vxge_hw_ring_rxd_post_post_wmb(ringh, first_dtr);
 529
 530out:
 531        vxge_debug_entryexit(VXGE_TRACE,
 532                                "%s:%d  Exiting...",
 533                                __func__, __LINE__);
 534        return VXGE_HW_OK;
 535}
 536
 537/*
 538 * vxge_xmit_compl
 539 *
 540 * If an interrupt was raised to indicate DMA complete of the Tx packet,
 541 * this function is called. It identifies the last TxD whose buffer was
 542 * freed and frees all skbs whose data have already DMA'ed into the NICs
 543 * internal memory.
 544 */
 545static enum vxge_hw_status
 546vxge_xmit_compl(struct __vxge_hw_fifo *fifo_hw, void *dtr,
 547                enum vxge_hw_fifo_tcode t_code, void *userdata,
 548                struct sk_buff ***skb_ptr, int nr_skb, int *more)
 549{
 550        struct vxge_fifo *fifo = (struct vxge_fifo *)userdata;
 551        struct sk_buff *skb, **done_skb = *skb_ptr;
 552        int pkt_cnt = 0;
 553
 554        vxge_debug_entryexit(VXGE_TRACE,
 555                "%s:%d Entered....", __func__, __LINE__);
 556
 557        do {
 558                int frg_cnt;
 559                skb_frag_t *frag;
 560                int i = 0, j;
 561                struct vxge_tx_priv *txd_priv =
 562                        vxge_hw_fifo_txdl_private_get(dtr);
 563
 564                skb = txd_priv->skb;
 565                frg_cnt = skb_shinfo(skb)->nr_frags;
 566                frag = &skb_shinfo(skb)->frags[0];
 567
 568                vxge_debug_tx(VXGE_TRACE,
 569                                "%s: %s:%d fifo_hw = %p dtr = %p "
 570                                "tcode = 0x%x", fifo->ndev->name, __func__,
 571                                __LINE__, fifo_hw, dtr, t_code);
 572                /* check skb validity */
 573                vxge_assert(skb);
 574                vxge_debug_tx(VXGE_TRACE,
 575                        "%s: %s:%d skb = %p itxd_priv = %p frg_cnt = %d",
 576                        fifo->ndev->name, __func__, __LINE__,
 577                        skb, txd_priv, frg_cnt);
 578                if (unlikely(t_code)) {
 579                        fifo->stats.tx_errors++;
 580                        vxge_debug_tx(VXGE_ERR,
 581                                "%s: tx: dtr %p completed due to "
 582                                "error t_code %01x", fifo->ndev->name,
 583                                dtr, t_code);
 584                        vxge_hw_fifo_handle_tcode(fifo_hw, dtr, t_code);
 585                }
 586
 587                /*  for unfragmented skb */
 588                pci_unmap_single(fifo->pdev, txd_priv->dma_buffers[i++],
 589                                skb_headlen(skb), PCI_DMA_TODEVICE);
 590
 591                for (j = 0; j < frg_cnt; j++) {
 592                        pci_unmap_page(fifo->pdev,
 593                                        txd_priv->dma_buffers[i++],
 594                                        skb_frag_size(frag), PCI_DMA_TODEVICE);
 595                        frag += 1;
 596                }
 597
 598                vxge_hw_fifo_txdl_free(fifo_hw, dtr);
 599
 600                /* Updating the statistics block */
 601                u64_stats_update_begin(&fifo->stats.syncp);
 602                fifo->stats.tx_frms++;
 603                fifo->stats.tx_bytes += skb->len;
 604                u64_stats_update_end(&fifo->stats.syncp);
 605
 606                *done_skb++ = skb;
 607
 608                if (--nr_skb <= 0) {
 609                        *more = 1;
 610                        break;
 611                }
 612
 613                pkt_cnt++;
 614                if (pkt_cnt > fifo->indicate_max_pkts)
 615                        break;
 616
 617        } while (vxge_hw_fifo_txdl_next_completed(fifo_hw,
 618                                &dtr, &t_code) == VXGE_HW_OK);
 619
 620        *skb_ptr = done_skb;
 621        if (netif_tx_queue_stopped(fifo->txq))
 622                netif_tx_wake_queue(fifo->txq);
 623
 624        vxge_debug_entryexit(VXGE_TRACE,
 625                                "%s: %s:%d  Exiting...",
 626                                fifo->ndev->name, __func__, __LINE__);
 627        return VXGE_HW_OK;
 628}
 629
 630/* select a vpath to transmit the packet */
 631static u32 vxge_get_vpath_no(struct vxgedev *vdev, struct sk_buff *skb)
 632{
 633        u16 queue_len, counter = 0;
 634        if (skb->protocol == htons(ETH_P_IP)) {
 635                struct iphdr *ip;
 636                struct tcphdr *th;
 637
 638                ip = ip_hdr(skb);
 639
 640                if (!ip_is_fragment(ip)) {
 641                        th = (struct tcphdr *)(((unsigned char *)ip) +
 642                                        ip->ihl*4);
 643
 644                        queue_len = vdev->no_of_vpath;
 645                        counter = (ntohs(th->source) +
 646                                ntohs(th->dest)) &
 647                                vdev->vpath_selector[queue_len - 1];
 648                        if (counter >= queue_len)
 649                                counter = queue_len - 1;
 650                }
 651        }
 652        return counter;
 653}
 654
 655static enum vxge_hw_status vxge_search_mac_addr_in_list(
 656        struct vxge_vpath *vpath, u64 del_mac)
 657{
 658        struct list_head *entry, *next;
 659        list_for_each_safe(entry, next, &vpath->mac_addr_list) {
 660                if (((struct vxge_mac_addrs *)entry)->macaddr == del_mac)
 661                        return TRUE;
 662        }
 663        return FALSE;
 664}
 665
 666static int vxge_mac_list_add(struct vxge_vpath *vpath, struct macInfo *mac)
 667{
 668        struct vxge_mac_addrs *new_mac_entry;
 669        u8 *mac_address = NULL;
 670
 671        if (vpath->mac_addr_cnt >= VXGE_MAX_LEARN_MAC_ADDR_CNT)
 672                return TRUE;
 673
 674        new_mac_entry = kzalloc(sizeof(struct vxge_mac_addrs), GFP_ATOMIC);
 675        if (!new_mac_entry) {
 676                vxge_debug_mem(VXGE_ERR,
 677                        "%s: memory allocation failed",
 678                        VXGE_DRIVER_NAME);
 679                return FALSE;
 680        }
 681
 682        list_add(&new_mac_entry->item, &vpath->mac_addr_list);
 683
 684        /* Copy the new mac address to the list */
 685        mac_address = (u8 *)&new_mac_entry->macaddr;
 686        memcpy(mac_address, mac->macaddr, ETH_ALEN);
 687
 688        new_mac_entry->state = mac->state;
 689        vpath->mac_addr_cnt++;
 690
 691        if (is_multicast_ether_addr(mac->macaddr))
 692                vpath->mcast_addr_cnt++;
 693
 694        return TRUE;
 695}
 696
 697/* Add a mac address to DA table */
 698static enum vxge_hw_status
 699vxge_add_mac_addr(struct vxgedev *vdev, struct macInfo *mac)
 700{
 701        enum vxge_hw_status status = VXGE_HW_OK;
 702        struct vxge_vpath *vpath;
 703        enum vxge_hw_vpath_mac_addr_add_mode duplicate_mode;
 704
 705        if (is_multicast_ether_addr(mac->macaddr))
 706                duplicate_mode = VXGE_HW_VPATH_MAC_ADDR_ADD_DUPLICATE;
 707        else
 708                duplicate_mode = VXGE_HW_VPATH_MAC_ADDR_REPLACE_DUPLICATE;
 709
 710        vpath = &vdev->vpaths[mac->vpath_no];
 711        status = vxge_hw_vpath_mac_addr_add(vpath->handle, mac->macaddr,
 712                                                mac->macmask, duplicate_mode);
 713        if (status != VXGE_HW_OK) {
 714                vxge_debug_init(VXGE_ERR,
 715                        "DA config add entry failed for vpath:%d",
 716                        vpath->device_id);
 717        } else
 718                if (FALSE == vxge_mac_list_add(vpath, mac))
 719                        status = -EPERM;
 720
 721        return status;
 722}
 723
 724static int vxge_learn_mac(struct vxgedev *vdev, u8 *mac_header)
 725{
 726        struct macInfo mac_info;
 727        u8 *mac_address = NULL;
 728        u64 mac_addr = 0, vpath_vector = 0;
 729        int vpath_idx = 0;
 730        enum vxge_hw_status status = VXGE_HW_OK;
 731        struct vxge_vpath *vpath = NULL;
 732
 733        mac_address = (u8 *)&mac_addr;
 734        memcpy(mac_address, mac_header, ETH_ALEN);
 735
 736        /* Is this mac address already in the list? */
 737        for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
 738                vpath = &vdev->vpaths[vpath_idx];
 739                if (vxge_search_mac_addr_in_list(vpath, mac_addr))
 740                        return vpath_idx;
 741        }
 742
 743        memset(&mac_info, 0, sizeof(struct macInfo));
 744        memcpy(mac_info.macaddr, mac_header, ETH_ALEN);
 745
 746        /* Any vpath has room to add mac address to its da table? */
 747        for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
 748                vpath = &vdev->vpaths[vpath_idx];
 749                if (vpath->mac_addr_cnt < vpath->max_mac_addr_cnt) {
 750                        /* Add this mac address to this vpath */
 751                        mac_info.vpath_no = vpath_idx;
 752                        mac_info.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE;
 753                        status = vxge_add_mac_addr(vdev, &mac_info);
 754                        if (status != VXGE_HW_OK)
 755                                return -EPERM;
 756                        return vpath_idx;
 757                }
 758        }
 759
 760        mac_info.state = VXGE_LL_MAC_ADDR_IN_LIST;
 761        vpath_idx = 0;
 762        mac_info.vpath_no = vpath_idx;
 763        /* Is the first vpath already selected as catch-basin ? */
 764        vpath = &vdev->vpaths[vpath_idx];
 765        if (vpath->mac_addr_cnt > vpath->max_mac_addr_cnt) {
 766                /* Add this mac address to this vpath */
 767                if (FALSE == vxge_mac_list_add(vpath, &mac_info))
 768                        return -EPERM;
 769                return vpath_idx;
 770        }
 771
 772        /* Select first vpath as catch-basin */
 773        vpath_vector = vxge_mBIT(vpath->device_id);
 774        status = vxge_hw_mgmt_reg_write(vpath->vdev->devh,
 775                                vxge_hw_mgmt_reg_type_mrpcim,
 776                                0,
 777                                (ulong)offsetof(
 778                                        struct vxge_hw_mrpcim_reg,
 779                                        rts_mgr_cbasin_cfg),
 780                                vpath_vector);
 781        if (status != VXGE_HW_OK) {
 782                vxge_debug_tx(VXGE_ERR,
 783                        "%s: Unable to set the vpath-%d in catch-basin mode",
 784                        VXGE_DRIVER_NAME, vpath->device_id);
 785                return -EPERM;
 786        }
 787
 788        if (FALSE == vxge_mac_list_add(vpath, &mac_info))
 789                return -EPERM;
 790
 791        return vpath_idx;
 792}
 793
 794/**
 795 * vxge_xmit
 796 * @skb : the socket buffer containing the Tx data.
 797 * @dev : device pointer.
 798 *
 799 * This function is the Tx entry point of the driver. Neterion NIC supports
 800 * certain protocol assist features on Tx side, namely  CSO, S/G, LSO.
 801*/
 802static netdev_tx_t
 803vxge_xmit(struct sk_buff *skb, struct net_device *dev)
 804{
 805        struct vxge_fifo *fifo = NULL;
 806        void *dtr_priv;
 807        void *dtr = NULL;
 808        struct vxgedev *vdev = NULL;
 809        enum vxge_hw_status status;
 810        int frg_cnt, first_frg_len;
 811        skb_frag_t *frag;
 812        int i = 0, j = 0, avail;
 813        u64 dma_pointer;
 814        struct vxge_tx_priv *txdl_priv = NULL;
 815        struct __vxge_hw_fifo *fifo_hw;
 816        int offload_type;
 817        int vpath_no = 0;
 818
 819        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
 820                        dev->name, __func__, __LINE__);
 821
 822        /* A buffer with no data will be dropped */
 823        if (unlikely(skb->len <= 0)) {
 824                vxge_debug_tx(VXGE_ERR,
 825                        "%s: Buffer has no data..", dev->name);
 826                dev_kfree_skb_any(skb);
 827                return NETDEV_TX_OK;
 828        }
 829
 830        vdev = netdev_priv(dev);
 831
 832        if (unlikely(!is_vxge_card_up(vdev))) {
 833                vxge_debug_tx(VXGE_ERR,
 834                        "%s: vdev not initialized", dev->name);
 835                dev_kfree_skb_any(skb);
 836                return NETDEV_TX_OK;
 837        }
 838
 839        if (vdev->config.addr_learn_en) {
 840                vpath_no = vxge_learn_mac(vdev, skb->data + ETH_ALEN);
 841                if (vpath_no == -EPERM) {
 842                        vxge_debug_tx(VXGE_ERR,
 843                                "%s: Failed to store the mac address",
 844                                dev->name);
 845                        dev_kfree_skb_any(skb);
 846                        return NETDEV_TX_OK;
 847                }
 848        }
 849
 850        if (vdev->config.tx_steering_type == TX_MULTIQ_STEERING)
 851                vpath_no = skb_get_queue_mapping(skb);
 852        else if (vdev->config.tx_steering_type == TX_PORT_STEERING)
 853                vpath_no = vxge_get_vpath_no(vdev, skb);
 854
 855        vxge_debug_tx(VXGE_TRACE, "%s: vpath_no= %d", dev->name, vpath_no);
 856
 857        if (vpath_no >= vdev->no_of_vpath)
 858                vpath_no = 0;
 859
 860        fifo = &vdev->vpaths[vpath_no].fifo;
 861        fifo_hw = fifo->handle;
 862
 863        if (netif_tx_queue_stopped(fifo->txq))
 864                return NETDEV_TX_BUSY;
 865
 866        avail = vxge_hw_fifo_free_txdl_count_get(fifo_hw);
 867        if (avail == 0) {
 868                vxge_debug_tx(VXGE_ERR,
 869                        "%s: No free TXDs available", dev->name);
 870                fifo->stats.txd_not_free++;
 871                goto _exit0;
 872        }
 873
 874        /* Last TXD?  Stop tx queue to avoid dropping packets.  TX
 875         * completion will resume the queue.
 876         */
 877        if (avail == 1)
 878                netif_tx_stop_queue(fifo->txq);
 879
 880        status = vxge_hw_fifo_txdl_reserve(fifo_hw, &dtr, &dtr_priv);
 881        if (unlikely(status != VXGE_HW_OK)) {
 882                vxge_debug_tx(VXGE_ERR,
 883                   "%s: Out of descriptors .", dev->name);
 884                fifo->stats.txd_out_of_desc++;
 885                goto _exit0;
 886        }
 887
 888        vxge_debug_tx(VXGE_TRACE,
 889                "%s: %s:%d fifo_hw = %p dtr = %p dtr_priv = %p",
 890                dev->name, __func__, __LINE__,
 891                fifo_hw, dtr, dtr_priv);
 892
 893        if (vlan_tx_tag_present(skb)) {
 894                u16 vlan_tag = vlan_tx_tag_get(skb);
 895                vxge_hw_fifo_txdl_vlan_set(dtr, vlan_tag);
 896        }
 897
 898        first_frg_len = skb_headlen(skb);
 899
 900        dma_pointer = pci_map_single(fifo->pdev, skb->data, first_frg_len,
 901                                PCI_DMA_TODEVICE);
 902
 903        if (unlikely(pci_dma_mapping_error(fifo->pdev, dma_pointer))) {
 904                vxge_hw_fifo_txdl_free(fifo_hw, dtr);
 905                fifo->stats.pci_map_fail++;
 906                goto _exit0;
 907        }
 908
 909        txdl_priv = vxge_hw_fifo_txdl_private_get(dtr);
 910        txdl_priv->skb = skb;
 911        txdl_priv->dma_buffers[j] = dma_pointer;
 912
 913        frg_cnt = skb_shinfo(skb)->nr_frags;
 914        vxge_debug_tx(VXGE_TRACE,
 915                        "%s: %s:%d skb = %p txdl_priv = %p "
 916                        "frag_cnt = %d dma_pointer = 0x%llx", dev->name,
 917                        __func__, __LINE__, skb, txdl_priv,
 918                        frg_cnt, (unsigned long long)dma_pointer);
 919
 920        vxge_hw_fifo_txdl_buffer_set(fifo_hw, dtr, j++, dma_pointer,
 921                first_frg_len);
 922
 923        frag = &skb_shinfo(skb)->frags[0];
 924        for (i = 0; i < frg_cnt; i++) {
 925                /* ignore 0 length fragment */
 926                if (!skb_frag_size(frag))
 927                        continue;
 928
 929                dma_pointer = (u64)skb_frag_dma_map(&fifo->pdev->dev, frag,
 930                                                    0, skb_frag_size(frag),
 931                                                    DMA_TO_DEVICE);
 932
 933                if (unlikely(dma_mapping_error(&fifo->pdev->dev, dma_pointer)))
 934                        goto _exit2;
 935                vxge_debug_tx(VXGE_TRACE,
 936                        "%s: %s:%d frag = %d dma_pointer = 0x%llx",
 937                                dev->name, __func__, __LINE__, i,
 938                                (unsigned long long)dma_pointer);
 939
 940                txdl_priv->dma_buffers[j] = dma_pointer;
 941                vxge_hw_fifo_txdl_buffer_set(fifo_hw, dtr, j++, dma_pointer,
 942                                        skb_frag_size(frag));
 943                frag += 1;
 944        }
 945
 946        offload_type = vxge_offload_type(skb);
 947
 948        if (offload_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
 949                int mss = vxge_tcp_mss(skb);
 950                if (mss) {
 951                        vxge_debug_tx(VXGE_TRACE, "%s: %s:%d mss = %d",
 952                                dev->name, __func__, __LINE__, mss);
 953                        vxge_hw_fifo_txdl_mss_set(dtr, mss);
 954                } else {
 955                        vxge_assert(skb->len <=
 956                                dev->mtu + VXGE_HW_MAC_HEADER_MAX_SIZE);
 957                        vxge_assert(0);
 958                        goto _exit1;
 959                }
 960        }
 961
 962        if (skb->ip_summed == CHECKSUM_PARTIAL)
 963                vxge_hw_fifo_txdl_cksum_set_bits(dtr,
 964                                        VXGE_HW_FIFO_TXD_TX_CKO_IPV4_EN |
 965                                        VXGE_HW_FIFO_TXD_TX_CKO_TCP_EN |
 966                                        VXGE_HW_FIFO_TXD_TX_CKO_UDP_EN);
 967
 968        vxge_hw_fifo_txdl_post(fifo_hw, dtr);
 969
 970        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d  Exiting...",
 971                dev->name, __func__, __LINE__);
 972        return NETDEV_TX_OK;
 973
 974_exit2:
 975        vxge_debug_tx(VXGE_TRACE, "%s: pci_map_page failed", dev->name);
 976_exit1:
 977        j = 0;
 978        frag = &skb_shinfo(skb)->frags[0];
 979
 980        pci_unmap_single(fifo->pdev, txdl_priv->dma_buffers[j++],
 981                        skb_headlen(skb), PCI_DMA_TODEVICE);
 982
 983        for (; j < i; j++) {
 984                pci_unmap_page(fifo->pdev, txdl_priv->dma_buffers[j],
 985                        skb_frag_size(frag), PCI_DMA_TODEVICE);
 986                frag += 1;
 987        }
 988
 989        vxge_hw_fifo_txdl_free(fifo_hw, dtr);
 990_exit0:
 991        netif_tx_stop_queue(fifo->txq);
 992        dev_kfree_skb_any(skb);
 993
 994        return NETDEV_TX_OK;
 995}
 996
 997/*
 998 * vxge_rx_term
 999 *
1000 * Function will be called by hw function to abort all outstanding receive
1001 * descriptors.
1002 */
1003static void
1004vxge_rx_term(void *dtrh, enum vxge_hw_rxd_state state, void *userdata)
1005{
1006        struct vxge_ring *ring = (struct vxge_ring *)userdata;
1007        struct vxge_rx_priv *rx_priv =
1008                vxge_hw_ring_rxd_private_get(dtrh);
1009
1010        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
1011                        ring->ndev->name, __func__, __LINE__);
1012        if (state != VXGE_HW_RXD_STATE_POSTED)
1013                return;
1014
1015        pci_unmap_single(ring->pdev, rx_priv->data_dma,
1016                rx_priv->data_size, PCI_DMA_FROMDEVICE);
1017
1018        dev_kfree_skb(rx_priv->skb);
1019        rx_priv->skb_data = NULL;
1020
1021        vxge_debug_entryexit(VXGE_TRACE,
1022                "%s: %s:%d  Exiting...",
1023                ring->ndev->name, __func__, __LINE__);
1024}
1025
1026/*
1027 * vxge_tx_term
1028 *
1029 * Function will be called to abort all outstanding tx descriptors
1030 */
1031static void
1032vxge_tx_term(void *dtrh, enum vxge_hw_txdl_state state, void *userdata)
1033{
1034        struct vxge_fifo *fifo = (struct vxge_fifo *)userdata;
1035        skb_frag_t *frag;
1036        int i = 0, j, frg_cnt;
1037        struct vxge_tx_priv *txd_priv = vxge_hw_fifo_txdl_private_get(dtrh);
1038        struct sk_buff *skb = txd_priv->skb;
1039
1040        vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);
1041
1042        if (state != VXGE_HW_TXDL_STATE_POSTED)
1043                return;
1044
1045        /* check skb validity */
1046        vxge_assert(skb);
1047        frg_cnt = skb_shinfo(skb)->nr_frags;
1048        frag = &skb_shinfo(skb)->frags[0];
1049
1050        /*  for unfragmented skb */
1051        pci_unmap_single(fifo->pdev, txd_priv->dma_buffers[i++],
1052                skb_headlen(skb), PCI_DMA_TODEVICE);
1053
1054        for (j = 0; j < frg_cnt; j++) {
1055                pci_unmap_page(fifo->pdev, txd_priv->dma_buffers[i++],
1056                               skb_frag_size(frag), PCI_DMA_TODEVICE);
1057                frag += 1;
1058        }
1059
1060        dev_kfree_skb(skb);
1061
1062        vxge_debug_entryexit(VXGE_TRACE,
1063                "%s:%d  Exiting...", __func__, __LINE__);
1064}
1065
1066static int vxge_mac_list_del(struct vxge_vpath *vpath, struct macInfo *mac)
1067{
1068        struct list_head *entry, *next;
1069        u64 del_mac = 0;
1070        u8 *mac_address = (u8 *) (&del_mac);
1071
1072        /* Copy the mac address to delete from the list */
1073        memcpy(mac_address, mac->macaddr, ETH_ALEN);
1074
1075        list_for_each_safe(entry, next, &vpath->mac_addr_list) {
1076                if (((struct vxge_mac_addrs *)entry)->macaddr == del_mac) {
1077                        list_del(entry);
1078                        kfree((struct vxge_mac_addrs *)entry);
1079                        vpath->mac_addr_cnt--;
1080
1081                        if (is_multicast_ether_addr(mac->macaddr))
1082                                vpath->mcast_addr_cnt--;
1083                        return TRUE;
1084                }
1085        }
1086
1087        return FALSE;
1088}
1089
1090/* delete a mac address from DA table */
1091static enum vxge_hw_status
1092vxge_del_mac_addr(struct vxgedev *vdev, struct macInfo *mac)
1093{
1094        enum vxge_hw_status status = VXGE_HW_OK;
1095        struct vxge_vpath *vpath;
1096
1097        vpath = &vdev->vpaths[mac->vpath_no];
1098        status = vxge_hw_vpath_mac_addr_delete(vpath->handle, mac->macaddr,
1099                                                mac->macmask);
1100        if (status != VXGE_HW_OK) {
1101                vxge_debug_init(VXGE_ERR,
1102                        "DA config delete entry failed for vpath:%d",
1103                        vpath->device_id);
1104        } else
1105                vxge_mac_list_del(vpath, mac);
1106        return status;
1107}
1108
1109/**
1110 * vxge_set_multicast
1111 * @dev: pointer to the device structure
1112 *
1113 * Entry point for multicast address enable/disable
1114 * This function is a driver entry point which gets called by the kernel
1115 * whenever multicast addresses must be enabled/disabled. This also gets
1116 * called to set/reset promiscuous mode. Depending on the deivce flag, we
1117 * determine, if multicast address must be enabled or if promiscuous mode
1118 * is to be disabled etc.
1119 */
1120static void vxge_set_multicast(struct net_device *dev)
1121{
1122        struct netdev_hw_addr *ha;
1123        struct vxgedev *vdev;
1124        int i, mcast_cnt = 0;
1125        struct __vxge_hw_device *hldev;
1126        struct vxge_vpath *vpath;
1127        enum vxge_hw_status status = VXGE_HW_OK;
1128        struct macInfo mac_info;
1129        int vpath_idx = 0;
1130        struct vxge_mac_addrs *mac_entry;
1131        struct list_head *list_head;
1132        struct list_head *entry, *next;
1133        u8 *mac_address = NULL;
1134
1135        vxge_debug_entryexit(VXGE_TRACE,
1136                "%s:%d", __func__, __LINE__);
1137
1138        vdev = netdev_priv(dev);
1139        hldev = vdev->devh;
1140
1141        if (unlikely(!is_vxge_card_up(vdev)))
1142                return;
1143
1144        if ((dev->flags & IFF_ALLMULTI) && (!vdev->all_multi_flg)) {
1145                for (i = 0; i < vdev->no_of_vpath; i++) {
1146                        vpath = &vdev->vpaths[i];
1147                        vxge_assert(vpath->is_open);
1148                        status = vxge_hw_vpath_mcast_enable(vpath->handle);
1149                        if (status != VXGE_HW_OK)
1150                                vxge_debug_init(VXGE_ERR, "failed to enable "
1151                                                "multicast, status %d", status);
1152                        vdev->all_multi_flg = 1;
1153                }
1154        } else if (!(dev->flags & IFF_ALLMULTI) && (vdev->all_multi_flg)) {
1155                for (i = 0; i < vdev->no_of_vpath; i++) {
1156                        vpath = &vdev->vpaths[i];
1157                        vxge_assert(vpath->is_open);
1158                        status = vxge_hw_vpath_mcast_disable(vpath->handle);
1159                        if (status != VXGE_HW_OK)
1160                                vxge_debug_init(VXGE_ERR, "failed to disable "
1161                                                "multicast, status %d", status);
1162                        vdev->all_multi_flg = 0;
1163                }
1164        }
1165
1166
1167        if (!vdev->config.addr_learn_en) {
1168                for (i = 0; i < vdev->no_of_vpath; i++) {
1169                        vpath = &vdev->vpaths[i];
1170                        vxge_assert(vpath->is_open);
1171
1172                        if (dev->flags & IFF_PROMISC)
1173                                status = vxge_hw_vpath_promisc_enable(
1174                                        vpath->handle);
1175                        else
1176                                status = vxge_hw_vpath_promisc_disable(
1177                                        vpath->handle);
1178                        if (status != VXGE_HW_OK)
1179                                vxge_debug_init(VXGE_ERR, "failed to %s promisc"
1180                                        ", status %d", dev->flags&IFF_PROMISC ?
1181                                        "enable" : "disable", status);
1182                }
1183        }
1184
1185        memset(&mac_info, 0, sizeof(struct macInfo));
1186        /* Update individual M_CAST address list */
1187        if ((!vdev->all_multi_flg) && netdev_mc_count(dev)) {
1188                mcast_cnt = vdev->vpaths[0].mcast_addr_cnt;
1189                list_head = &vdev->vpaths[0].mac_addr_list;
1190                if ((netdev_mc_count(dev) +
1191                        (vdev->vpaths[0].mac_addr_cnt - mcast_cnt)) >
1192                                vdev->vpaths[0].max_mac_addr_cnt)
1193                        goto _set_all_mcast;
1194
1195                /* Delete previous MC's */
1196                for (i = 0; i < mcast_cnt; i++) {
1197                        list_for_each_safe(entry, next, list_head) {
1198                                mac_entry = (struct vxge_mac_addrs *)entry;
1199                                /* Copy the mac address to delete */
1200                                mac_address = (u8 *)&mac_entry->macaddr;
1201                                memcpy(mac_info.macaddr, mac_address, ETH_ALEN);
1202
1203                                if (is_multicast_ether_addr(mac_info.macaddr)) {
1204                                        for (vpath_idx = 0; vpath_idx <
1205                                                vdev->no_of_vpath;
1206                                                vpath_idx++) {
1207                                                mac_info.vpath_no = vpath_idx;
1208                                                status = vxge_del_mac_addr(
1209                                                                vdev,
1210                                                                &mac_info);
1211                                        }
1212                                }
1213                        }
1214                }
1215
1216                /* Add new ones */
1217                netdev_for_each_mc_addr(ha, dev) {
1218                        memcpy(mac_info.macaddr, ha->addr, ETH_ALEN);
1219                        for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath;
1220                                        vpath_idx++) {
1221                                mac_info.vpath_no = vpath_idx;
1222                                mac_info.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE;
1223                                status = vxge_add_mac_addr(vdev, &mac_info);
1224                                if (status != VXGE_HW_OK) {
1225                                        vxge_debug_init(VXGE_ERR,
1226                                                "%s:%d Setting individual"
1227                                                "multicast address failed",
1228                                                __func__, __LINE__);
1229                                        goto _set_all_mcast;
1230                                }
1231                        }
1232                }
1233
1234                return;
1235_set_all_mcast:
1236                mcast_cnt = vdev->vpaths[0].mcast_addr_cnt;
1237                /* Delete previous MC's */
1238                for (i = 0; i < mcast_cnt; i++) {
1239                        list_for_each_safe(entry, next, list_head) {
1240                                mac_entry = (struct vxge_mac_addrs *)entry;
1241                                /* Copy the mac address to delete */
1242                                mac_address = (u8 *)&mac_entry->macaddr;
1243                                memcpy(mac_info.macaddr, mac_address, ETH_ALEN);
1244
1245                                if (is_multicast_ether_addr(mac_info.macaddr))
1246                                        break;
1247                        }
1248
1249                        for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath;
1250                                        vpath_idx++) {
1251                                mac_info.vpath_no = vpath_idx;
1252                                status = vxge_del_mac_addr(vdev, &mac_info);
1253                        }
1254                }
1255
1256                /* Enable all multicast */
1257                for (i = 0; i < vdev->no_of_vpath; i++) {
1258                        vpath = &vdev->vpaths[i];
1259                        vxge_assert(vpath->is_open);
1260
1261                        status = vxge_hw_vpath_mcast_enable(vpath->handle);
1262                        if (status != VXGE_HW_OK) {
1263                                vxge_debug_init(VXGE_ERR,
1264                                        "%s:%d Enabling all multicasts failed",
1265                                         __func__, __LINE__);
1266                        }
1267                        vdev->all_multi_flg = 1;
1268                }
1269                dev->flags |= IFF_ALLMULTI;
1270        }
1271
1272        vxge_debug_entryexit(VXGE_TRACE,
1273                "%s:%d  Exiting...", __func__, __LINE__);
1274}
1275
1276/**
1277 * vxge_set_mac_addr
1278 * @dev: pointer to the device structure
1279 *
1280 * Update entry "0" (default MAC addr)
1281 */
1282static int vxge_set_mac_addr(struct net_device *dev, void *p)
1283{
1284        struct sockaddr *addr = p;
1285        struct vxgedev *vdev;
1286        struct __vxge_hw_device *hldev;
1287        enum vxge_hw_status status = VXGE_HW_OK;
1288        struct macInfo mac_info_new, mac_info_old;
1289        int vpath_idx = 0;
1290
1291        vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);
1292
1293        vdev = netdev_priv(dev);
1294        hldev = vdev->devh;
1295
1296        if (!is_valid_ether_addr(addr->sa_data))
1297                return -EINVAL;
1298
1299        memset(&mac_info_new, 0, sizeof(struct macInfo));
1300        memset(&mac_info_old, 0, sizeof(struct macInfo));
1301
1302        vxge_debug_entryexit(VXGE_TRACE, "%s:%d  Exiting...",
1303                __func__, __LINE__);
1304
1305        /* Get the old address */
1306        memcpy(mac_info_old.macaddr, dev->dev_addr, dev->addr_len);
1307
1308        /* Copy the new address */
1309        memcpy(mac_info_new.macaddr, addr->sa_data, dev->addr_len);
1310
1311        /* First delete the old mac address from all the vpaths
1312        as we can't specify the index while adding new mac address */
1313        for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
1314                struct vxge_vpath *vpath = &vdev->vpaths[vpath_idx];
1315                if (!vpath->is_open) {
1316                        /* This can happen when this interface is added/removed
1317                        to the bonding interface. Delete this station address
1318                        from the linked list */
1319                        vxge_mac_list_del(vpath, &mac_info_old);
1320
1321                        /* Add this new address to the linked list
1322                        for later restoring */
1323                        vxge_mac_list_add(vpath, &mac_info_new);
1324
1325                        continue;
1326                }
1327                /* Delete the station address */
1328                mac_info_old.vpath_no = vpath_idx;
1329                status = vxge_del_mac_addr(vdev, &mac_info_old);
1330        }
1331
1332        if (unlikely(!is_vxge_card_up(vdev))) {
1333                memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1334                return VXGE_HW_OK;
1335        }
1336
1337        /* Set this mac address to all the vpaths */
1338        for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
1339                mac_info_new.vpath_no = vpath_idx;
1340                mac_info_new.state = VXGE_LL_MAC_ADDR_IN_DA_TABLE;
1341                status = vxge_add_mac_addr(vdev, &mac_info_new);
1342                if (status != VXGE_HW_OK)
1343                        return -EINVAL;
1344        }
1345
1346        memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1347
1348        return status;
1349}
1350
1351/*
1352 * vxge_vpath_intr_enable
1353 * @vdev: pointer to vdev
1354 * @vp_id: vpath for which to enable the interrupts
1355 *
1356 * Enables the interrupts for the vpath
1357*/
1358static void vxge_vpath_intr_enable(struct vxgedev *vdev, int vp_id)
1359{
1360        struct vxge_vpath *vpath = &vdev->vpaths[vp_id];
1361        int msix_id = 0;
1362        int tim_msix_id[4] = {0, 1, 0, 0};
1363        int alarm_msix_id = VXGE_ALARM_MSIX_ID;
1364
1365        vxge_hw_vpath_intr_enable(vpath->handle);
1366
1367        if (vdev->config.intr_type == INTA)
1368                vxge_hw_vpath_inta_unmask_tx_rx(vpath->handle);
1369        else {
1370                vxge_hw_vpath_msix_set(vpath->handle, tim_msix_id,
1371                        alarm_msix_id);
1372
1373                msix_id = vpath->device_id * VXGE_HW_VPATH_MSIX_ACTIVE;
1374                vxge_hw_vpath_msix_unmask(vpath->handle, msix_id);
1375                vxge_hw_vpath_msix_unmask(vpath->handle, msix_id + 1);
1376
1377                /* enable the alarm vector */
1378                msix_id = (vpath->handle->vpath->hldev->first_vp_id *
1379                        VXGE_HW_VPATH_MSIX_ACTIVE) + alarm_msix_id;
1380                vxge_hw_vpath_msix_unmask(vpath->handle, msix_id);
1381        }
1382}
1383
1384/*
1385 * vxge_vpath_intr_disable
1386 * @vdev: pointer to vdev
1387 * @vp_id: vpath for which to disable the interrupts
1388 *
1389 * Disables the interrupts for the vpath
1390*/
1391static void vxge_vpath_intr_disable(struct vxgedev *vdev, int vp_id)
1392{
1393        struct vxge_vpath *vpath = &vdev->vpaths[vp_id];
1394        struct __vxge_hw_device *hldev;
1395        int msix_id;
1396
1397        hldev = pci_get_drvdata(vdev->pdev);
1398
1399        vxge_hw_vpath_wait_receive_idle(hldev, vpath->device_id);
1400
1401        vxge_hw_vpath_intr_disable(vpath->handle);
1402
1403        if (vdev->config.intr_type == INTA)
1404                vxge_hw_vpath_inta_mask_tx_rx(vpath->handle);
1405        else {
1406                msix_id = vpath->device_id * VXGE_HW_VPATH_MSIX_ACTIVE;
1407                vxge_hw_vpath_msix_mask(vpath->handle, msix_id);
1408                vxge_hw_vpath_msix_mask(vpath->handle, msix_id + 1);
1409
1410                /* disable the alarm vector */
1411                msix_id = (vpath->handle->vpath->hldev->first_vp_id *
1412                        VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID;
1413                vxge_hw_vpath_msix_mask(vpath->handle, msix_id);
1414        }
1415}
1416
1417/* list all mac addresses from DA table */
1418static enum vxge_hw_status
1419vxge_search_mac_addr_in_da_table(struct vxge_vpath *vpath, struct macInfo *mac)
1420{
1421        enum vxge_hw_status status = VXGE_HW_OK;
1422        unsigned char macmask[ETH_ALEN];
1423        unsigned char macaddr[ETH_ALEN];
1424
1425        status = vxge_hw_vpath_mac_addr_get(vpath->handle,
1426                                macaddr, macmask);
1427        if (status != VXGE_HW_OK) {
1428                vxge_debug_init(VXGE_ERR,
1429                        "DA config list entry failed for vpath:%d",
1430                        vpath->device_id);
1431                return status;
1432        }
1433
1434        while (!ether_addr_equal(mac->macaddr, macaddr)) {
1435                status = vxge_hw_vpath_mac_addr_get_next(vpath->handle,
1436                                macaddr, macmask);
1437                if (status != VXGE_HW_OK)
1438                        break;
1439        }
1440
1441        return status;
1442}
1443
1444/* Store all mac addresses from the list to the DA table */
1445static enum vxge_hw_status vxge_restore_vpath_mac_addr(struct vxge_vpath *vpath)
1446{
1447        enum vxge_hw_status status = VXGE_HW_OK;
1448        struct macInfo mac_info;
1449        u8 *mac_address = NULL;
1450        struct list_head *entry, *next;
1451
1452        memset(&mac_info, 0, sizeof(struct macInfo));
1453
1454        if (vpath->is_open) {
1455                list_for_each_safe(entry, next, &vpath->mac_addr_list) {
1456                        mac_address =
1457                                (u8 *)&
1458                                ((struct vxge_mac_addrs *)entry)->macaddr;
1459                        memcpy(mac_info.macaddr, mac_address, ETH_ALEN);
1460                        ((struct vxge_mac_addrs *)entry)->state =
1461                                VXGE_LL_MAC_ADDR_IN_DA_TABLE;
1462                        /* does this mac address already exist in da table? */
1463                        status = vxge_search_mac_addr_in_da_table(vpath,
1464                                &mac_info);
1465                        if (status != VXGE_HW_OK) {
1466                                /* Add this mac address to the DA table */
1467                                status = vxge_hw_vpath_mac_addr_add(
1468                                        vpath->handle, mac_info.macaddr,
1469                                        mac_info.macmask,
1470                                    VXGE_HW_VPATH_MAC_ADDR_ADD_DUPLICATE);
1471                                if (status != VXGE_HW_OK) {
1472                                        vxge_debug_init(VXGE_ERR,
1473                                            "DA add entry failed for vpath:%d",
1474                                            vpath->device_id);
1475                                        ((struct vxge_mac_addrs *)entry)->state
1476                                                = VXGE_LL_MAC_ADDR_IN_LIST;
1477                                }
1478                        }
1479                }
1480        }
1481
1482        return status;
1483}
1484
1485/* Store all vlan ids from the list to the vid table */
1486static enum vxge_hw_status
1487vxge_restore_vpath_vid_table(struct vxge_vpath *vpath)
1488{
1489        enum vxge_hw_status status = VXGE_HW_OK;
1490        struct vxgedev *vdev = vpath->vdev;
1491        u16 vid;
1492
1493        if (!vpath->is_open)
1494                return status;
1495
1496        for_each_set_bit(vid, vdev->active_vlans, VLAN_N_VID)
1497                status = vxge_hw_vpath_vid_add(vpath->handle, vid);
1498
1499        return status;
1500}
1501
1502/*
1503 * vxge_reset_vpath
1504 * @vdev: pointer to vdev
1505 * @vp_id: vpath to reset
1506 *
1507 * Resets the vpath
1508*/
1509static int vxge_reset_vpath(struct vxgedev *vdev, int vp_id)
1510{
1511        enum vxge_hw_status status = VXGE_HW_OK;
1512        struct vxge_vpath *vpath = &vdev->vpaths[vp_id];
1513        int ret = 0;
1514
1515        /* check if device is down already */
1516        if (unlikely(!is_vxge_card_up(vdev)))
1517                return 0;
1518
1519        /* is device reset already scheduled */
1520        if (test_bit(__VXGE_STATE_RESET_CARD, &vdev->state))
1521                return 0;
1522
1523        if (vpath->handle) {
1524                if (vxge_hw_vpath_reset(vpath->handle) == VXGE_HW_OK) {
1525                        if (is_vxge_card_up(vdev) &&
1526                                vxge_hw_vpath_recover_from_reset(vpath->handle)
1527                                        != VXGE_HW_OK) {
1528                                vxge_debug_init(VXGE_ERR,
1529                                        "vxge_hw_vpath_recover_from_reset"
1530                                        "failed for vpath:%d", vp_id);
1531                                return status;
1532                        }
1533                } else {
1534                        vxge_debug_init(VXGE_ERR,
1535                                "vxge_hw_vpath_reset failed for"
1536                                "vpath:%d", vp_id);
1537                                return status;
1538                }
1539        } else
1540                return VXGE_HW_FAIL;
1541
1542        vxge_restore_vpath_mac_addr(vpath);
1543        vxge_restore_vpath_vid_table(vpath);
1544
1545        /* Enable all broadcast */
1546        vxge_hw_vpath_bcast_enable(vpath->handle);
1547
1548        /* Enable all multicast */
1549        if (vdev->all_multi_flg) {
1550                status = vxge_hw_vpath_mcast_enable(vpath->handle);
1551                if (status != VXGE_HW_OK)
1552                        vxge_debug_init(VXGE_ERR,
1553                                "%s:%d Enabling multicast failed",
1554                                __func__, __LINE__);
1555        }
1556
1557        /* Enable the interrupts */
1558        vxge_vpath_intr_enable(vdev, vp_id);
1559
1560        smp_wmb();
1561
1562        /* Enable the flow of traffic through the vpath */
1563        vxge_hw_vpath_enable(vpath->handle);
1564
1565        smp_wmb();
1566        vxge_hw_vpath_rx_doorbell_init(vpath->handle);
1567        vpath->ring.last_status = VXGE_HW_OK;
1568
1569        /* Vpath reset done */
1570        clear_bit(vp_id, &vdev->vp_reset);
1571
1572        /* Start the vpath queue */
1573        if (netif_tx_queue_stopped(vpath->fifo.txq))
1574                netif_tx_wake_queue(vpath->fifo.txq);
1575
1576        return ret;
1577}
1578
1579/* Configure CI */
1580static void vxge_config_ci_for_tti_rti(struct vxgedev *vdev)
1581{
1582        int i = 0;
1583
1584        /* Enable CI for RTI */
1585        if (vdev->config.intr_type == MSI_X) {
1586                for (i = 0; i < vdev->no_of_vpath; i++) {
1587                        struct __vxge_hw_ring *hw_ring;
1588
1589                        hw_ring = vdev->vpaths[i].ring.handle;
1590                        vxge_hw_vpath_dynamic_rti_ci_set(hw_ring);
1591                }
1592        }
1593
1594        /* Enable CI for TTI */
1595        for (i = 0; i < vdev->no_of_vpath; i++) {
1596                struct __vxge_hw_fifo *hw_fifo = vdev->vpaths[i].fifo.handle;
1597                vxge_hw_vpath_tti_ci_set(hw_fifo);
1598                /*
1599                 * For Inta (with or without napi), Set CI ON for only one
1600                 * vpath. (Have only one free running timer).
1601                 */
1602                if ((vdev->config.intr_type == INTA) && (i == 0))
1603                        break;
1604        }
1605
1606        return;
1607}
1608
1609static int do_vxge_reset(struct vxgedev *vdev, int event)
1610{
1611        enum vxge_hw_status status;
1612        int ret = 0, vp_id, i;
1613
1614        vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);
1615
1616        if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_START_RESET)) {
1617                /* check if device is down already */
1618                if (unlikely(!is_vxge_card_up(vdev)))
1619                        return 0;
1620
1621                /* is reset already scheduled */
1622                if (test_and_set_bit(__VXGE_STATE_RESET_CARD, &vdev->state))
1623                        return 0;
1624        }
1625
1626        if (event == VXGE_LL_FULL_RESET) {
1627                netif_carrier_off(vdev->ndev);
1628
1629                /* wait for all the vpath reset to complete */
1630                for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
1631                        while (test_bit(vp_id, &vdev->vp_reset))
1632                                msleep(50);
1633                }
1634
1635                netif_carrier_on(vdev->ndev);
1636
1637                /* if execution mode is set to debug, don't reset the adapter */
1638                if (unlikely(vdev->exec_mode)) {
1639                        vxge_debug_init(VXGE_ERR,
1640                                "%s: execution mode is debug, returning..",
1641                                vdev->ndev->name);
1642                        clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
1643                        netif_tx_stop_all_queues(vdev->ndev);
1644                        return 0;
1645                }
1646        }
1647
1648        if (event == VXGE_LL_FULL_RESET) {
1649                vxge_hw_device_wait_receive_idle(vdev->devh);
1650                vxge_hw_device_intr_disable(vdev->devh);
1651
1652                switch (vdev->cric_err_event) {
1653                case VXGE_HW_EVENT_UNKNOWN:
1654                        netif_tx_stop_all_queues(vdev->ndev);
1655                        vxge_debug_init(VXGE_ERR,
1656                                "fatal: %s: Disabling device due to"
1657                                "unknown error",
1658                                vdev->ndev->name);
1659                        ret = -EPERM;
1660                        goto out;
1661                case VXGE_HW_EVENT_RESET_START:
1662                        break;
1663                case VXGE_HW_EVENT_RESET_COMPLETE:
1664                case VXGE_HW_EVENT_LINK_DOWN:
1665                case VXGE_HW_EVENT_LINK_UP:
1666                case VXGE_HW_EVENT_ALARM_CLEARED:
1667                case VXGE_HW_EVENT_ECCERR:
1668                case VXGE_HW_EVENT_MRPCIM_ECCERR:
1669                        ret = -EPERM;
1670                        goto out;
1671                case VXGE_HW_EVENT_FIFO_ERR:
1672                case VXGE_HW_EVENT_VPATH_ERR:
1673                        break;
1674                case VXGE_HW_EVENT_CRITICAL_ERR:
1675                        netif_tx_stop_all_queues(vdev->ndev);
1676                        vxge_debug_init(VXGE_ERR,
1677                                "fatal: %s: Disabling device due to"
1678                                "serious error",
1679                                vdev->ndev->name);
1680                        /* SOP or device reset required */
1681                        /* This event is not currently used */
1682                        ret = -EPERM;
1683                        goto out;
1684                case VXGE_HW_EVENT_SERR:
1685                        netif_tx_stop_all_queues(vdev->ndev);
1686                        vxge_debug_init(VXGE_ERR,
1687                                "fatal: %s: Disabling device due to"
1688                                "serious error",
1689                                vdev->ndev->name);
1690                        ret = -EPERM;
1691                        goto out;
1692                case VXGE_HW_EVENT_SRPCIM_SERR:
1693                case VXGE_HW_EVENT_MRPCIM_SERR:
1694                        ret = -EPERM;
1695                        goto out;
1696                case VXGE_HW_EVENT_SLOT_FREEZE:
1697                        netif_tx_stop_all_queues(vdev->ndev);
1698                        vxge_debug_init(VXGE_ERR,
1699                                "fatal: %s: Disabling device due to"
1700                                "slot freeze",
1701                                vdev->ndev->name);
1702                        ret = -EPERM;
1703                        goto out;
1704                default:
1705                        break;
1706
1707                }
1708        }
1709
1710        if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_START_RESET))
1711                netif_tx_stop_all_queues(vdev->ndev);
1712
1713        if (event == VXGE_LL_FULL_RESET) {
1714                status = vxge_reset_all_vpaths(vdev);
1715                if (status != VXGE_HW_OK) {
1716                        vxge_debug_init(VXGE_ERR,
1717                                "fatal: %s: can not reset vpaths",
1718                                vdev->ndev->name);
1719                        ret = -EPERM;
1720                        goto out;
1721                }
1722        }
1723
1724        if (event == VXGE_LL_COMPL_RESET) {
1725                for (i = 0; i < vdev->no_of_vpath; i++)
1726                        if (vdev->vpaths[i].handle) {
1727                                if (vxge_hw_vpath_recover_from_reset(
1728                                        vdev->vpaths[i].handle)
1729                                                != VXGE_HW_OK) {
1730                                        vxge_debug_init(VXGE_ERR,
1731                                                "vxge_hw_vpath_recover_"
1732                                                "from_reset failed for vpath: "
1733                                                "%d", i);
1734                                        ret = -EPERM;
1735                                        goto out;
1736                                }
1737                                } else {
1738                                        vxge_debug_init(VXGE_ERR,
1739                                        "vxge_hw_vpath_reset failed for "
1740                                                "vpath:%d", i);
1741                                        ret = -EPERM;
1742                                        goto out;
1743                                }
1744        }
1745
1746        if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_COMPL_RESET)) {
1747                /* Reprogram the DA table with populated mac addresses */
1748                for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
1749                        vxge_restore_vpath_mac_addr(&vdev->vpaths[vp_id]);
1750                        vxge_restore_vpath_vid_table(&vdev->vpaths[vp_id]);
1751                }
1752
1753                /* enable vpath interrupts */
1754                for (i = 0; i < vdev->no_of_vpath; i++)
1755                        vxge_vpath_intr_enable(vdev, i);
1756
1757                vxge_hw_device_intr_enable(vdev->devh);
1758
1759                smp_wmb();
1760
1761                /* Indicate card up */
1762                set_bit(__VXGE_STATE_CARD_UP, &vdev->state);
1763
1764                /* Get the traffic to flow through the vpaths */
1765                for (i = 0; i < vdev->no_of_vpath; i++) {
1766                        vxge_hw_vpath_enable(vdev->vpaths[i].handle);
1767                        smp_wmb();
1768                        vxge_hw_vpath_rx_doorbell_init(vdev->vpaths[i].handle);
1769                }
1770
1771                netif_tx_wake_all_queues(vdev->ndev);
1772        }
1773
1774        /* configure CI */
1775        vxge_config_ci_for_tti_rti(vdev);
1776
1777out:
1778        vxge_debug_entryexit(VXGE_TRACE,
1779                "%s:%d  Exiting...", __func__, __LINE__);
1780
1781        /* Indicate reset done */
1782        if ((event == VXGE_LL_FULL_RESET) || (event == VXGE_LL_COMPL_RESET))
1783                clear_bit(__VXGE_STATE_RESET_CARD, &vdev->state);
1784        return ret;
1785}
1786
1787/*
1788 * vxge_reset
1789 * @vdev: pointer to ll device
1790 *
1791 * driver may reset the chip on events of serr, eccerr, etc
1792 */
1793static void vxge_reset(struct work_struct *work)
1794{
1795        struct vxgedev *vdev = container_of(work, struct vxgedev, reset_task);
1796
1797        if (!netif_running(vdev->ndev))
1798                return;
1799
1800        do_vxge_reset(vdev, VXGE_LL_FULL_RESET);
1801}
1802
1803/**
1804 * vxge_poll - Receive handler when Receive Polling is used.
1805 * @dev: pointer to the device structure.
1806 * @budget: Number of packets budgeted to be processed in this iteration.
1807 *
1808 * This function comes into picture only if Receive side is being handled
1809 * through polling (called NAPI in linux). It mostly does what the normal
1810 * Rx interrupt handler does in terms of descriptor and packet processing
1811 * but not in an interrupt context. Also it will process a specified number
1812 * of packets at most in one iteration. This value is passed down by the
1813 * kernel as the function argument 'budget'.
1814 */
1815static int vxge_poll_msix(struct napi_struct *napi, int budget)
1816{
1817        struct vxge_ring *ring = container_of(napi, struct vxge_ring, napi);
1818        int pkts_processed;
1819        int budget_org = budget;
1820
1821        ring->budget = budget;
1822        ring->pkts_processed = 0;
1823        vxge_hw_vpath_poll_rx(ring->handle);
1824        pkts_processed = ring->pkts_processed;
1825
1826        if (ring->pkts_processed < budget_org) {
1827                napi_complete(napi);
1828
1829                /* Re enable the Rx interrupts for the vpath */
1830                vxge_hw_channel_msix_unmask(
1831                                (struct __vxge_hw_channel *)ring->handle,
1832                                ring->rx_vector_no);
1833                mmiowb();
1834        }
1835
1836        /* We are copying and returning the local variable, in case if after
1837         * clearing the msix interrupt above, if the interrupt fires right
1838         * away which can preempt this NAPI thread */
1839        return pkts_processed;
1840}
1841
1842static int vxge_poll_inta(struct napi_struct *napi, int budget)
1843{
1844        struct vxgedev *vdev = container_of(napi, struct vxgedev, napi);
1845        int pkts_processed = 0;
1846        int i;
1847        int budget_org = budget;
1848        struct vxge_ring *ring;
1849
1850        struct __vxge_hw_device *hldev = pci_get_drvdata(vdev->pdev);
1851
1852        for (i = 0; i < vdev->no_of_vpath; i++) {
1853                ring = &vdev->vpaths[i].ring;
1854                ring->budget = budget;
1855                ring->pkts_processed = 0;
1856                vxge_hw_vpath_poll_rx(ring->handle);
1857                pkts_processed += ring->pkts_processed;
1858                budget -= ring->pkts_processed;
1859                if (budget <= 0)
1860                        break;
1861        }
1862
1863        VXGE_COMPLETE_ALL_TX(vdev);
1864
1865        if (pkts_processed < budget_org) {
1866                napi_complete(napi);
1867                /* Re enable the Rx interrupts for the ring */
1868                vxge_hw_device_unmask_all(hldev);
1869                vxge_hw_device_flush_io(hldev);
1870        }
1871
1872        return pkts_processed;
1873}
1874
1875#ifdef CONFIG_NET_POLL_CONTROLLER
1876/**
1877 * vxge_netpoll - netpoll event handler entry point
1878 * @dev : pointer to the device structure.
1879 * Description:
1880 *      This function will be called by upper layer to check for events on the
1881 * interface in situations where interrupts are disabled. It is used for
1882 * specific in-kernel networking tasks, such as remote consoles and kernel
1883 * debugging over the network (example netdump in RedHat).
1884 */
1885static void vxge_netpoll(struct net_device *dev)
1886{
1887        struct vxgedev *vdev = netdev_priv(dev);
1888        struct pci_dev *pdev = vdev->pdev;
1889        struct __vxge_hw_device *hldev = pci_get_drvdata(pdev);
1890        const int irq = pdev->irq;
1891
1892        vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);
1893
1894        if (pci_channel_offline(pdev))
1895                return;
1896
1897        disable_irq(irq);
1898        vxge_hw_device_clear_tx_rx(hldev);
1899
1900        vxge_hw_device_clear_tx_rx(hldev);
1901        VXGE_COMPLETE_ALL_RX(vdev);
1902        VXGE_COMPLETE_ALL_TX(vdev);
1903
1904        enable_irq(irq);
1905
1906        vxge_debug_entryexit(VXGE_TRACE,
1907                "%s:%d  Exiting...", __func__, __LINE__);
1908}
1909#endif
1910
1911/* RTH configuration */
1912static enum vxge_hw_status vxge_rth_configure(struct vxgedev *vdev)
1913{
1914        enum vxge_hw_status status = VXGE_HW_OK;
1915        struct vxge_hw_rth_hash_types hash_types;
1916        u8 itable[256] = {0}; /* indirection table */
1917        u8 mtable[256] = {0}; /* CPU to vpath mapping  */
1918        int index;
1919
1920        /*
1921         * Filling
1922         *      - itable with bucket numbers
1923         *      - mtable with bucket-to-vpath mapping
1924         */
1925        for (index = 0; index < (1 << vdev->config.rth_bkt_sz); index++) {
1926                itable[index] = index;
1927                mtable[index] = index % vdev->no_of_vpath;
1928        }
1929
1930        /* set indirection table, bucket-to-vpath mapping */
1931        status = vxge_hw_vpath_rts_rth_itable_set(vdev->vp_handles,
1932                                                vdev->no_of_vpath,
1933                                                mtable, itable,
1934                                                vdev->config.rth_bkt_sz);
1935        if (status != VXGE_HW_OK) {
1936                vxge_debug_init(VXGE_ERR,
1937                        "RTH indirection table configuration failed "
1938                        "for vpath:%d", vdev->vpaths[0].device_id);
1939                return status;
1940        }
1941
1942        /* Fill RTH hash types */
1943        hash_types.hash_type_tcpipv4_en   = vdev->config.rth_hash_type_tcpipv4;
1944        hash_types.hash_type_ipv4_en      = vdev->config.rth_hash_type_ipv4;
1945        hash_types.hash_type_tcpipv6_en   = vdev->config.rth_hash_type_tcpipv6;
1946        hash_types.hash_type_ipv6_en      = vdev->config.rth_hash_type_ipv6;
1947        hash_types.hash_type_tcpipv6ex_en =
1948                                        vdev->config.rth_hash_type_tcpipv6ex;
1949        hash_types.hash_type_ipv6ex_en    = vdev->config.rth_hash_type_ipv6ex;
1950
1951        /*
1952         * Because the itable_set() method uses the active_table field
1953         * for the target virtual path the RTH config should be updated
1954         * for all VPATHs. The h/w only uses the lowest numbered VPATH
1955         * when steering frames.
1956         */
1957         for (index = 0; index < vdev->no_of_vpath; index++) {
1958                status = vxge_hw_vpath_rts_rth_set(
1959                                vdev->vpaths[index].handle,
1960                                vdev->config.rth_algorithm,
1961                                &hash_types,
1962                                vdev->config.rth_bkt_sz);
1963                 if (status != VXGE_HW_OK) {
1964                        vxge_debug_init(VXGE_ERR,
1965                                "RTH configuration failed for vpath:%d",
1966                                vdev->vpaths[index].device_id);
1967                        return status;
1968                 }
1969         }
1970
1971        return status;
1972}
1973
1974/* reset vpaths */
1975static enum vxge_hw_status vxge_reset_all_vpaths(struct vxgedev *vdev)
1976{
1977        enum vxge_hw_status status = VXGE_HW_OK;
1978        struct vxge_vpath *vpath;
1979        int i;
1980
1981        for (i = 0; i < vdev->no_of_vpath; i++) {
1982                vpath = &vdev->vpaths[i];
1983                if (vpath->handle) {
1984                        if (vxge_hw_vpath_reset(vpath->handle) == VXGE_HW_OK) {
1985                                if (is_vxge_card_up(vdev) &&
1986                                        vxge_hw_vpath_recover_from_reset(
1987                                                vpath->handle) != VXGE_HW_OK) {
1988                                        vxge_debug_init(VXGE_ERR,
1989                                                "vxge_hw_vpath_recover_"
1990                                                "from_reset failed for vpath: "
1991                                                "%d", i);
1992                                        return status;
1993                                }
1994                        } else {
1995                                vxge_debug_init(VXGE_ERR,
1996                                        "vxge_hw_vpath_reset failed for "
1997                                        "vpath:%d", i);
1998                                        return status;
1999                        }
2000                }
2001        }
2002
2003        return status;
2004}
2005
2006/* close vpaths */
2007static void vxge_close_vpaths(struct vxgedev *vdev, int index)
2008{
2009        struct vxge_vpath *vpath;
2010        int i;
2011
2012        for (i = index; i < vdev->no_of_vpath; i++) {
2013                vpath = &vdev->vpaths[i];
2014
2015                if (vpath->handle && vpath->is_open) {
2016                        vxge_hw_vpath_close(vpath->handle);
2017                        vdev->stats.vpaths_open--;
2018                }
2019                vpath->is_open = 0;
2020                vpath->handle = NULL;
2021        }
2022}
2023
2024/* open vpaths */
2025static int vxge_open_vpaths(struct vxgedev *vdev)
2026{
2027        struct vxge_hw_vpath_attr attr;
2028        enum vxge_hw_status status;
2029        struct vxge_vpath *vpath;
2030        u32 vp_id = 0;
2031        int i;
2032
2033        for (i = 0; i < vdev->no_of_vpath; i++) {
2034                vpath = &vdev->vpaths[i];
2035                vxge_assert(vpath->is_configured);
2036
2037                if (!vdev->titan1) {
2038                        struct vxge_hw_vp_config *vcfg;
2039                        vcfg = &vdev->devh->config.vp_config[vpath->device_id];
2040
2041                        vcfg->rti.urange_a = RTI_T1A_RX_URANGE_A;
2042                        vcfg->rti.urange_b = RTI_T1A_RX_URANGE_B;
2043                        vcfg->rti.urange_c = RTI_T1A_RX_URANGE_C;
2044                        vcfg->tti.uec_a = TTI_T1A_TX_UFC_A;
2045                        vcfg->tti.uec_b = TTI_T1A_TX_UFC_B;
2046                        vcfg->tti.uec_c = TTI_T1A_TX_UFC_C(vdev->mtu);
2047                        vcfg->tti.uec_d = TTI_T1A_TX_UFC_D(vdev->mtu);
2048                        vcfg->tti.ltimer_val = VXGE_T1A_TTI_LTIMER_VAL;
2049                        vcfg->tti.rtimer_val = VXGE_T1A_TTI_RTIMER_VAL;
2050                }
2051
2052                attr.vp_id = vpath->device_id;
2053                attr.fifo_attr.callback = vxge_xmit_compl;
2054                attr.fifo_attr.txdl_term = vxge_tx_term;
2055                attr.fifo_attr.per_txdl_space = sizeof(struct vxge_tx_priv);
2056                attr.fifo_attr.userdata = &vpath->fifo;
2057
2058                attr.ring_attr.callback = vxge_rx_1b_compl;
2059                attr.ring_attr.rxd_init = vxge_rx_initial_replenish;
2060                attr.ring_attr.rxd_term = vxge_rx_term;
2061                attr.ring_attr.per_rxd_space = sizeof(struct vxge_rx_priv);
2062                attr.ring_attr.userdata = &vpath->ring;
2063
2064                vpath->ring.ndev = vdev->ndev;
2065                vpath->ring.pdev = vdev->pdev;
2066
2067                status = vxge_hw_vpath_open(vdev->devh, &attr, &vpath->handle);
2068                if (status == VXGE_HW_OK) {
2069                        vpath->fifo.handle =
2070                            (struct __vxge_hw_fifo *)attr.fifo_attr.userdata;
2071                        vpath->ring.handle =
2072                            (struct __vxge_hw_ring *)attr.ring_attr.userdata;
2073                        vpath->fifo.tx_steering_type =
2074                                vdev->config.tx_steering_type;
2075                        vpath->fifo.ndev = vdev->ndev;
2076                        vpath->fifo.pdev = vdev->pdev;
2077
2078                        u64_stats_init(&vpath->fifo.stats.syncp);
2079                        u64_stats_init(&vpath->ring.stats.syncp);
2080
2081                        if (vdev->config.tx_steering_type)
2082                                vpath->fifo.txq =
2083                                        netdev_get_tx_queue(vdev->ndev, i);
2084                        else
2085                                vpath->fifo.txq =
2086                                        netdev_get_tx_queue(vdev->ndev, 0);
2087                        vpath->fifo.indicate_max_pkts =
2088                                vdev->config.fifo_indicate_max_pkts;
2089                        vpath->fifo.tx_vector_no = 0;
2090                        vpath->ring.rx_vector_no = 0;
2091                        vpath->ring.rx_hwts = vdev->rx_hwts;
2092                        vpath->is_open = 1;
2093                        vdev->vp_handles[i] = vpath->handle;
2094                        vpath->ring.vlan_tag_strip = vdev->vlan_tag_strip;
2095                        vdev->stats.vpaths_open++;
2096                } else {
2097                        vdev->stats.vpath_open_fail++;
2098                        vxge_debug_init(VXGE_ERR, "%s: vpath: %d failed to "
2099                                        "open with status: %d",
2100                                        vdev->ndev->name, vpath->device_id,
2101                                        status);
2102                        vxge_close_vpaths(vdev, 0);
2103                        return -EPERM;
2104                }
2105
2106                vp_id = vpath->handle->vpath->vp_id;
2107                vdev->vpaths_deployed |= vxge_mBIT(vp_id);
2108        }
2109
2110        return VXGE_HW_OK;
2111}
2112
2113/**
2114 *  adaptive_coalesce_tx_interrupts - Changes the interrupt coalescing
2115 *  if the interrupts are not within a range
2116 *  @fifo: pointer to transmit fifo structure
2117 *  Description: The function changes boundary timer and restriction timer
2118 *  value depends on the traffic
2119 *  Return Value: None
2120 */
2121static void adaptive_coalesce_tx_interrupts(struct vxge_fifo *fifo)
2122{
2123        fifo->interrupt_count++;
2124        if (time_before(fifo->jiffies + HZ / 100, jiffies)) {
2125                struct __vxge_hw_fifo *hw_fifo = fifo->handle;
2126
2127                fifo->jiffies = jiffies;
2128                if (fifo->interrupt_count > VXGE_T1A_MAX_TX_INTERRUPT_COUNT &&
2129                    hw_fifo->rtimer != VXGE_TTI_RTIMER_ADAPT_VAL) {
2130                        hw_fifo->rtimer = VXGE_TTI_RTIMER_ADAPT_VAL;
2131                        vxge_hw_vpath_dynamic_tti_rtimer_set(hw_fifo);
2132                } else if (hw_fifo->rtimer != 0) {
2133                        hw_fifo->rtimer = 0;
2134                        vxge_hw_vpath_dynamic_tti_rtimer_set(hw_fifo);
2135                }
2136                fifo->interrupt_count = 0;
2137        }
2138}
2139
2140/**
2141 *  adaptive_coalesce_rx_interrupts - Changes the interrupt coalescing
2142 *  if the interrupts are not within a range
2143 *  @ring: pointer to receive ring structure
2144 *  Description: The function increases of decreases the packet counts within
2145 *  the ranges of traffic utilization, if the interrupts due to this ring are
2146 *  not within a fixed range.
2147 *  Return Value: Nothing
2148 */
2149static void adaptive_coalesce_rx_interrupts(struct vxge_ring *ring)
2150{
2151        ring->interrupt_count++;
2152        if (time_before(ring->jiffies + HZ / 100, jiffies)) {
2153                struct __vxge_hw_ring *hw_ring = ring->handle;
2154
2155                ring->jiffies = jiffies;
2156                if (ring->interrupt_count > VXGE_T1A_MAX_INTERRUPT_COUNT &&
2157                    hw_ring->rtimer != VXGE_RTI_RTIMER_ADAPT_VAL) {
2158                        hw_ring->rtimer = VXGE_RTI_RTIMER_ADAPT_VAL;
2159                        vxge_hw_vpath_dynamic_rti_rtimer_set(hw_ring);
2160                } else if (hw_ring->rtimer != 0) {
2161                        hw_ring->rtimer = 0;
2162                        vxge_hw_vpath_dynamic_rti_rtimer_set(hw_ring);
2163                }
2164                ring->interrupt_count = 0;
2165        }
2166}
2167
2168/*
2169 *  vxge_isr_napi
2170 *  @irq: the irq of the device.
2171 *  @dev_id: a void pointer to the hldev structure of the Titan device
2172 *  @ptregs: pointer to the registers pushed on the stack.
2173 *
2174 *  This function is the ISR handler of the device when napi is enabled. It
2175 *  identifies the reason for the interrupt and calls the relevant service
2176 *  routines.
2177 */
2178static irqreturn_t vxge_isr_napi(int irq, void *dev_id)
2179{
2180        struct net_device *dev;
2181        struct __vxge_hw_device *hldev;
2182        u64 reason;
2183        enum vxge_hw_status status;
2184        struct vxgedev *vdev = (struct vxgedev *)dev_id;
2185
2186        vxge_debug_intr(VXGE_TRACE, "%s:%d", __func__, __LINE__);
2187
2188        dev = vdev->ndev;
2189        hldev = pci_get_drvdata(vdev->pdev);
2190
2191        if (pci_channel_offline(vdev->pdev))
2192                return IRQ_NONE;
2193
2194        if (unlikely(!is_vxge_card_up(vdev)))
2195                return IRQ_HANDLED;
2196
2197        status = vxge_hw_device_begin_irq(hldev, vdev->exec_mode, &reason);
2198        if (status == VXGE_HW_OK) {
2199                vxge_hw_device_mask_all(hldev);
2200
2201                if (reason &
2202                        VXGE_HW_TITAN_GENERAL_INT_STATUS_VPATH_TRAFFIC_INT(
2203                        vdev->vpaths_deployed >>
2204                        (64 - VXGE_HW_MAX_VIRTUAL_PATHS))) {
2205
2206                        vxge_hw_device_clear_tx_rx(hldev);
2207                        napi_schedule(&vdev->napi);
2208                        vxge_debug_intr(VXGE_TRACE,
2209                                "%s:%d  Exiting...", __func__, __LINE__);
2210                        return IRQ_HANDLED;
2211                } else
2212                        vxge_hw_device_unmask_all(hldev);
2213        } else if (unlikely((status == VXGE_HW_ERR_VPATH) ||
2214                (status == VXGE_HW_ERR_CRITICAL) ||
2215                (status == VXGE_HW_ERR_FIFO))) {
2216                vxge_hw_device_mask_all(hldev);
2217                vxge_hw_device_flush_io(hldev);
2218                return IRQ_HANDLED;
2219        } else if (unlikely(status == VXGE_HW_ERR_SLOT_FREEZE))
2220                return IRQ_HANDLED;
2221
2222        vxge_debug_intr(VXGE_TRACE, "%s:%d  Exiting...", __func__, __LINE__);
2223        return IRQ_NONE;
2224}
2225
2226#ifdef CONFIG_PCI_MSI
2227
2228static irqreturn_t vxge_tx_msix_handle(int irq, void *dev_id)
2229{
2230        struct vxge_fifo *fifo = (struct vxge_fifo *)dev_id;
2231
2232        adaptive_coalesce_tx_interrupts(fifo);
2233
2234        vxge_hw_channel_msix_mask((struct __vxge_hw_channel *)fifo->handle,
2235                                  fifo->tx_vector_no);
2236
2237        vxge_hw_channel_msix_clear((struct __vxge_hw_channel *)fifo->handle,
2238                                   fifo->tx_vector_no);
2239
2240        VXGE_COMPLETE_VPATH_TX(fifo);
2241
2242        vxge_hw_channel_msix_unmask((struct __vxge_hw_channel *)fifo->handle,
2243                                    fifo->tx_vector_no);
2244
2245        mmiowb();
2246
2247        return IRQ_HANDLED;
2248}
2249
2250static irqreturn_t vxge_rx_msix_napi_handle(int irq, void *dev_id)
2251{
2252        struct vxge_ring *ring = (struct vxge_ring *)dev_id;
2253
2254        adaptive_coalesce_rx_interrupts(ring);
2255
2256        vxge_hw_channel_msix_mask((struct __vxge_hw_channel *)ring->handle,
2257                                  ring->rx_vector_no);
2258
2259        vxge_hw_channel_msix_clear((struct __vxge_hw_channel *)ring->handle,
2260                                   ring->rx_vector_no);
2261
2262        napi_schedule(&ring->napi);
2263        return IRQ_HANDLED;
2264}
2265
2266static irqreturn_t
2267vxge_alarm_msix_handle(int irq, void *dev_id)
2268{
2269        int i;
2270        enum vxge_hw_status status;
2271        struct vxge_vpath *vpath = (struct vxge_vpath *)dev_id;
2272        struct vxgedev *vdev = vpath->vdev;
2273        int msix_id = (vpath->handle->vpath->vp_id *
2274                VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID;
2275
2276        for (i = 0; i < vdev->no_of_vpath; i++) {
2277                /* Reduce the chance of losing alarm interrupts by masking
2278                 * the vector. A pending bit will be set if an alarm is
2279                 * generated and on unmask the interrupt will be fired.
2280                 */
2281                vxge_hw_vpath_msix_mask(vdev->vpaths[i].handle, msix_id);
2282                vxge_hw_vpath_msix_clear(vdev->vpaths[i].handle, msix_id);
2283                mmiowb();
2284
2285                status = vxge_hw_vpath_alarm_process(vdev->vpaths[i].handle,
2286                        vdev->exec_mode);
2287                if (status == VXGE_HW_OK) {
2288                        vxge_hw_vpath_msix_unmask(vdev->vpaths[i].handle,
2289                                                  msix_id);
2290                        mmiowb();
2291                        continue;
2292                }
2293                vxge_debug_intr(VXGE_ERR,
2294                        "%s: vxge_hw_vpath_alarm_process failed %x ",
2295                        VXGE_DRIVER_NAME, status);
2296        }
2297        return IRQ_HANDLED;
2298}
2299
2300static int vxge_alloc_msix(struct vxgedev *vdev)
2301{
2302        int j, i, ret = 0;
2303        int msix_intr_vect = 0, temp;
2304        vdev->intr_cnt = 0;
2305
2306start:
2307        /* Tx/Rx MSIX Vectors count */
2308        vdev->intr_cnt = vdev->no_of_vpath * 2;
2309
2310        /* Alarm MSIX Vectors count */
2311        vdev->intr_cnt++;
2312
2313        vdev->entries = kcalloc(vdev->intr_cnt, sizeof(struct msix_entry),
2314                                GFP_KERNEL);
2315        if (!vdev->entries) {
2316                vxge_debug_init(VXGE_ERR,
2317                        "%s: memory allocation failed",
2318                        VXGE_DRIVER_NAME);
2319                ret = -ENOMEM;
2320                goto alloc_entries_failed;
2321        }
2322
2323        vdev->vxge_entries = kcalloc(vdev->intr_cnt,
2324                                     sizeof(struct vxge_msix_entry),
2325                                     GFP_KERNEL);
2326        if (!vdev->vxge_entries) {
2327                vxge_debug_init(VXGE_ERR, "%s: memory allocation failed",
2328                        VXGE_DRIVER_NAME);
2329                ret = -ENOMEM;
2330                goto alloc_vxge_entries_failed;
2331        }
2332
2333        for (i = 0, j = 0; i < vdev->no_of_vpath; i++) {
2334
2335                msix_intr_vect = i * VXGE_HW_VPATH_MSIX_ACTIVE;
2336
2337                /* Initialize the fifo vector */
2338                vdev->entries[j].entry = msix_intr_vect;
2339                vdev->vxge_entries[j].entry = msix_intr_vect;
2340                vdev->vxge_entries[j].in_use = 0;
2341                j++;
2342
2343                /* Initialize the ring vector */
2344                vdev->entries[j].entry = msix_intr_vect + 1;
2345                vdev->vxge_entries[j].entry = msix_intr_vect + 1;
2346                vdev->vxge_entries[j].in_use = 0;
2347                j++;
2348        }
2349
2350        /* Initialize the alarm vector */
2351        vdev->entries[j].entry = VXGE_ALARM_MSIX_ID;
2352        vdev->vxge_entries[j].entry = VXGE_ALARM_MSIX_ID;
2353        vdev->vxge_entries[j].in_use = 0;
2354
2355        ret = pci_enable_msix_range(vdev->pdev,
2356                                    vdev->entries, 3, vdev->intr_cnt);
2357        if (ret < 0) {
2358                ret = -ENODEV;
2359                goto enable_msix_failed;
2360        } else if (ret < vdev->intr_cnt) {
2361                pci_disable_msix(vdev->pdev);
2362
2363                vxge_debug_init(VXGE_ERR,
2364                        "%s: MSI-X enable failed for %d vectors, ret: %d",
2365                        VXGE_DRIVER_NAME, vdev->intr_cnt, ret);
2366                if (max_config_vpath != VXGE_USE_DEFAULT) {
2367                        ret = -ENODEV;
2368                        goto enable_msix_failed;
2369                }
2370
2371                kfree(vdev->entries);
2372                kfree(vdev->vxge_entries);
2373                vdev->entries = NULL;
2374                vdev->vxge_entries = NULL;
2375                /* Try with less no of vector by reducing no of vpaths count */
2376                temp = (ret - 1)/2;
2377                vxge_close_vpaths(vdev, temp);
2378                vdev->no_of_vpath = temp;
2379                goto start;
2380        }
2381        return 0;
2382
2383enable_msix_failed:
2384        kfree(vdev->vxge_entries);
2385alloc_vxge_entries_failed:
2386        kfree(vdev->entries);
2387alloc_entries_failed:
2388        return ret;
2389}
2390
2391static int vxge_enable_msix(struct vxgedev *vdev)
2392{
2393
2394        int i, ret = 0;
2395        /* 0 - Tx, 1 - Rx  */
2396        int tim_msix_id[4] = {0, 1, 0, 0};
2397
2398        vdev->intr_cnt = 0;
2399
2400        /* allocate msix vectors */
2401        ret = vxge_alloc_msix(vdev);
2402        if (!ret) {
2403                for (i = 0; i < vdev->no_of_vpath; i++) {
2404                        struct vxge_vpath *vpath = &vdev->vpaths[i];
2405
2406                        /* If fifo or ring are not enabled, the MSIX vector for
2407                         * it should be set to 0.
2408                         */
2409                        vpath->ring.rx_vector_no = (vpath->device_id *
2410                                                VXGE_HW_VPATH_MSIX_ACTIVE) + 1;
2411
2412                        vpath->fifo.tx_vector_no = (vpath->device_id *
2413                                                VXGE_HW_VPATH_MSIX_ACTIVE);
2414
2415                        vxge_hw_vpath_msix_set(vpath->handle, tim_msix_id,
2416                                               VXGE_ALARM_MSIX_ID);
2417                }
2418        }
2419
2420        return ret;
2421}
2422
2423static void vxge_rem_msix_isr(struct vxgedev *vdev)
2424{
2425        int intr_cnt;
2426
2427        for (intr_cnt = 0; intr_cnt < (vdev->no_of_vpath * 2 + 1);
2428                intr_cnt++) {
2429                if (vdev->vxge_entries[intr_cnt].in_use) {
2430                        synchronize_irq(vdev->entries[intr_cnt].vector);
2431                        free_irq(vdev->entries[intr_cnt].vector,
2432                                vdev->vxge_entries[intr_cnt].arg);
2433                        vdev->vxge_entries[intr_cnt].in_use = 0;
2434                }
2435        }
2436
2437        kfree(vdev->entries);
2438        kfree(vdev->vxge_entries);
2439        vdev->entries = NULL;
2440        vdev->vxge_entries = NULL;
2441
2442        if (vdev->config.intr_type == MSI_X)
2443                pci_disable_msix(vdev->pdev);
2444}
2445#endif
2446
2447static void vxge_rem_isr(struct vxgedev *vdev)
2448{
2449#ifdef CONFIG_PCI_MSI
2450        if (vdev->config.intr_type == MSI_X) {
2451                vxge_rem_msix_isr(vdev);
2452        } else
2453#endif
2454        if (vdev->config.intr_type == INTA) {
2455                        synchronize_irq(vdev->pdev->irq);
2456                        free_irq(vdev->pdev->irq, vdev);
2457        }
2458}
2459
2460static int vxge_add_isr(struct vxgedev *vdev)
2461{
2462        int ret = 0;
2463#ifdef CONFIG_PCI_MSI
2464        int vp_idx = 0, intr_idx = 0, intr_cnt = 0, msix_idx = 0, irq_req = 0;
2465        int pci_fun = PCI_FUNC(vdev->pdev->devfn);
2466
2467        if (vdev->config.intr_type == MSI_X)
2468                ret = vxge_enable_msix(vdev);
2469
2470        if (ret) {
2471                vxge_debug_init(VXGE_ERR,
2472                        "%s: Enabling MSI-X Failed", VXGE_DRIVER_NAME);
2473                vxge_debug_init(VXGE_ERR,
2474                        "%s: Defaulting to INTA", VXGE_DRIVER_NAME);
2475                vdev->config.intr_type = INTA;
2476        }
2477
2478        if (vdev->config.intr_type == MSI_X) {
2479                for (intr_idx = 0;
2480                     intr_idx < (vdev->no_of_vpath *
2481                        VXGE_HW_VPATH_MSIX_ACTIVE); intr_idx++) {
2482
2483                        msix_idx = intr_idx % VXGE_HW_VPATH_MSIX_ACTIVE;
2484                        irq_req = 0;
2485
2486                        switch (msix_idx) {
2487                        case 0:
2488                                snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN,
2489                                "%s:vxge:MSI-X %d - Tx - fn:%d vpath:%d",
2490                                        vdev->ndev->name,
2491                                        vdev->entries[intr_cnt].entry,
2492                                        pci_fun, vp_idx);
2493                                ret = request_irq(
2494                                    vdev->entries[intr_cnt].vector,
2495                                        vxge_tx_msix_handle, 0,
2496                                        vdev->desc[intr_cnt],
2497                                        &vdev->vpaths[vp_idx].fifo);
2498                                        vdev->vxge_entries[intr_cnt].arg =
2499                                                &vdev->vpaths[vp_idx].fifo;
2500                                irq_req = 1;
2501                                break;
2502                        case 1:
2503                                snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN,
2504                                "%s:vxge:MSI-X %d - Rx - fn:%d vpath:%d",
2505                                        vdev->ndev->name,
2506                                        vdev->entries[intr_cnt].entry,
2507                                        pci_fun, vp_idx);
2508                                ret = request_irq(
2509                                    vdev->entries[intr_cnt].vector,
2510                                        vxge_rx_msix_napi_handle,
2511                                        0,
2512                                        vdev->desc[intr_cnt],
2513                                        &vdev->vpaths[vp_idx].ring);
2514                                        vdev->vxge_entries[intr_cnt].arg =
2515                                                &vdev->vpaths[vp_idx].ring;
2516                                irq_req = 1;
2517                                break;
2518                        }
2519
2520                        if (ret) {
2521                                vxge_debug_init(VXGE_ERR,
2522                                        "%s: MSIX - %d  Registration failed",
2523                                        vdev->ndev->name, intr_cnt);
2524                                vxge_rem_msix_isr(vdev);
2525                                vdev->config.intr_type = INTA;
2526                                vxge_debug_init(VXGE_ERR,
2527                                        "%s: Defaulting to INTA"
2528                                        , vdev->ndev->name);
2529                                        goto INTA_MODE;
2530                        }
2531
2532                        if (irq_req) {
2533                                /* We requested for this msix interrupt */
2534                                vdev->vxge_entries[intr_cnt].in_use = 1;
2535                                msix_idx +=  vdev->vpaths[vp_idx].device_id *
2536                                        VXGE_HW_VPATH_MSIX_ACTIVE;
2537                                vxge_hw_vpath_msix_unmask(
2538                                        vdev->vpaths[vp_idx].handle,
2539                                        msix_idx);
2540                                intr_cnt++;
2541                        }
2542
2543                        /* Point to next vpath handler */
2544                        if (((intr_idx + 1) % VXGE_HW_VPATH_MSIX_ACTIVE == 0) &&
2545                            (vp_idx < (vdev->no_of_vpath - 1)))
2546                                vp_idx++;
2547                }
2548
2549                intr_cnt = vdev->no_of_vpath * 2;
2550                snprintf(vdev->desc[intr_cnt], VXGE_INTR_STRLEN,
2551                        "%s:vxge:MSI-X %d - Alarm - fn:%d",
2552                        vdev->ndev->name,
2553                        vdev->entries[intr_cnt].entry,
2554                        pci_fun);
2555                /* For Alarm interrupts */
2556                ret = request_irq(vdev->entries[intr_cnt].vector,
2557                                        vxge_alarm_msix_handle, 0,
2558                                        vdev->desc[intr_cnt],
2559                                        &vdev->vpaths[0]);
2560                if (ret) {
2561                        vxge_debug_init(VXGE_ERR,
2562                                "%s: MSIX - %d Registration failed",
2563                                vdev->ndev->name, intr_cnt);
2564                        vxge_rem_msix_isr(vdev);
2565                        vdev->config.intr_type = INTA;
2566                        vxge_debug_init(VXGE_ERR,
2567                                "%s: Defaulting to INTA",
2568                                vdev->ndev->name);
2569                                goto INTA_MODE;
2570                }
2571
2572                msix_idx = (vdev->vpaths[0].handle->vpath->vp_id *
2573                        VXGE_HW_VPATH_MSIX_ACTIVE) + VXGE_ALARM_MSIX_ID;
2574                vxge_hw_vpath_msix_unmask(vdev->vpaths[vp_idx].handle,
2575                                        msix_idx);
2576                vdev->vxge_entries[intr_cnt].in_use = 1;
2577                vdev->vxge_entries[intr_cnt].arg = &vdev->vpaths[0];
2578        }
2579INTA_MODE:
2580#endif
2581
2582        if (vdev->config.intr_type == INTA) {
2583                snprintf(vdev->desc[0], VXGE_INTR_STRLEN,
2584                        "%s:vxge:INTA", vdev->ndev->name);
2585                vxge_hw_device_set_intr_type(vdev->devh,
2586                        VXGE_HW_INTR_MODE_IRQLINE);
2587
2588                vxge_hw_vpath_tti_ci_set(vdev->vpaths[0].fifo.handle);
2589
2590                ret = request_irq((int) vdev->pdev->irq,
2591                        vxge_isr_napi,
2592                        IRQF_SHARED, vdev->desc[0], vdev);
2593                if (ret) {
2594                        vxge_debug_init(VXGE_ERR,
2595                                "%s %s-%d: ISR registration failed",
2596                                VXGE_DRIVER_NAME, "IRQ", vdev->pdev->irq);
2597                        return -ENODEV;
2598                }
2599                vxge_debug_init(VXGE_TRACE,
2600                        "new %s-%d line allocated",
2601                        "IRQ", vdev->pdev->irq);
2602        }
2603
2604        return VXGE_HW_OK;
2605}
2606
2607static void vxge_poll_vp_reset(unsigned long data)
2608{
2609        struct vxgedev *vdev = (struct vxgedev *)data;
2610        int i, j = 0;
2611
2612        for (i = 0; i < vdev->no_of_vpath; i++) {
2613                if (test_bit(i, &vdev->vp_reset)) {
2614                        vxge_reset_vpath(vdev, i);
2615                        j++;
2616                }
2617        }
2618        if (j && (vdev->config.intr_type != MSI_X)) {
2619                vxge_hw_device_unmask_all(vdev->devh);
2620                vxge_hw_device_flush_io(vdev->devh);
2621        }
2622
2623        mod_timer(&vdev->vp_reset_timer, jiffies + HZ / 2);
2624}
2625
2626static void vxge_poll_vp_lockup(unsigned long data)
2627{
2628        struct vxgedev *vdev = (struct vxgedev *)data;
2629        enum vxge_hw_status status = VXGE_HW_OK;
2630        struct vxge_vpath *vpath;
2631        struct vxge_ring *ring;
2632        int i;
2633        unsigned long rx_frms;
2634
2635        for (i = 0; i < vdev->no_of_vpath; i++) {
2636                ring = &vdev->vpaths[i].ring;
2637
2638                /* Truncated to machine word size number of frames */
2639                rx_frms = ACCESS_ONCE(ring->stats.rx_frms);
2640
2641                /* Did this vpath received any packets */
2642                if (ring->stats.prev_rx_frms == rx_frms) {
2643                        status = vxge_hw_vpath_check_leak(ring->handle);
2644
2645                        /* Did it received any packets last time */
2646                        if ((VXGE_HW_FAIL == status) &&
2647                                (VXGE_HW_FAIL == ring->last_status)) {
2648
2649                                /* schedule vpath reset */
2650                                if (!test_and_set_bit(i, &vdev->vp_reset)) {
2651                                        vpath = &vdev->vpaths[i];
2652
2653                                        /* disable interrupts for this vpath */
2654                                        vxge_vpath_intr_disable(vdev, i);
2655
2656                                        /* stop the queue for this vpath */
2657                                        netif_tx_stop_queue(vpath->fifo.txq);
2658                                        continue;
2659                                }
2660                        }
2661                }
2662                ring->stats.prev_rx_frms = rx_frms;
2663                ring->last_status = status;
2664        }
2665
2666        /* Check every 1 milli second */
2667        mod_timer(&vdev->vp_lockup_timer, jiffies + HZ / 1000);
2668}
2669
2670static netdev_features_t vxge_fix_features(struct net_device *dev,
2671        netdev_features_t features)
2672{
2673        netdev_features_t changed = dev->features ^ features;
2674
2675        /* Enabling RTH requires some of the logic in vxge_device_register and a
2676         * vpath reset.  Due to these restrictions, only allow modification
2677         * while the interface is down.
2678         */
2679        if ((changed & NETIF_F_RXHASH) && netif_running(dev))
2680                features ^= NETIF_F_RXHASH;
2681
2682        return features;
2683}
2684
2685static int vxge_set_features(struct net_device *dev, netdev_features_t features)
2686{
2687        struct vxgedev *vdev = netdev_priv(dev);
2688        netdev_features_t changed = dev->features ^ features;
2689
2690        if (!(changed & NETIF_F_RXHASH))
2691                return 0;
2692
2693        /* !netif_running() ensured by vxge_fix_features() */
2694
2695        vdev->devh->config.rth_en = !!(features & NETIF_F_RXHASH);
2696        if (vxge_reset_all_vpaths(vdev) != VXGE_HW_OK) {
2697                dev->features = features ^ NETIF_F_RXHASH;
2698                vdev->devh->config.rth_en = !!(dev->features & NETIF_F_RXHASH);
2699                return -EIO;
2700        }
2701
2702        return 0;
2703}
2704
2705/**
2706 * vxge_open
2707 * @dev: pointer to the device structure.
2708 *
2709 * This function is the open entry point of the driver. It mainly calls a
2710 * function to allocate Rx buffers and inserts them into the buffer
2711 * descriptors and then enables the Rx part of the NIC.
2712 * Return value: '0' on success and an appropriate (-)ve integer as
2713 * defined in errno.h file on failure.
2714 */
2715static int vxge_open(struct net_device *dev)
2716{
2717        enum vxge_hw_status status;
2718        struct vxgedev *vdev;
2719        struct __vxge_hw_device *hldev;
2720        struct vxge_vpath *vpath;
2721        int ret = 0;
2722        int i;
2723        u64 val64, function_mode;
2724
2725        vxge_debug_entryexit(VXGE_TRACE,
2726                "%s: %s:%d", dev->name, __func__, __LINE__);
2727
2728        vdev = netdev_priv(dev);
2729        hldev = pci_get_drvdata(vdev->pdev);
2730        function_mode = vdev->config.device_hw_info.function_mode;
2731
2732        /* make sure you have link off by default every time Nic is
2733         * initialized */
2734        netif_carrier_off(dev);
2735
2736        /* Open VPATHs */
2737        status = vxge_open_vpaths(vdev);
2738        if (status != VXGE_HW_OK) {
2739                vxge_debug_init(VXGE_ERR,
2740                        "%s: fatal: Vpath open failed", vdev->ndev->name);
2741                ret = -EPERM;
2742                goto out0;
2743        }
2744
2745        vdev->mtu = dev->mtu;
2746
2747        status = vxge_add_isr(vdev);
2748        if (status != VXGE_HW_OK) {
2749                vxge_debug_init(VXGE_ERR,
2750                        "%s: fatal: ISR add failed", dev->name);
2751                ret = -EPERM;
2752                goto out1;
2753        }
2754
2755        if (vdev->config.intr_type != MSI_X) {
2756                netif_napi_add(dev, &vdev->napi, vxge_poll_inta,
2757                        vdev->config.napi_weight);
2758                napi_enable(&vdev->napi);
2759                for (i = 0; i < vdev->no_of_vpath; i++) {
2760                        vpath = &vdev->vpaths[i];
2761                        vpath->ring.napi_p = &vdev->napi;
2762                }
2763        } else {
2764                for (i = 0; i < vdev->no_of_vpath; i++) {
2765                        vpath = &vdev->vpaths[i];
2766                        netif_napi_add(dev, &vpath->ring.napi,
2767                            vxge_poll_msix, vdev->config.napi_weight);
2768                        napi_enable(&vpath->ring.napi);
2769                        vpath->ring.napi_p = &vpath->ring.napi;
2770                }
2771        }
2772
2773        /* configure RTH */
2774        if (vdev->config.rth_steering) {
2775                status = vxge_rth_configure(vdev);
2776                if (status != VXGE_HW_OK) {
2777                        vxge_debug_init(VXGE_ERR,
2778                                "%s: fatal: RTH configuration failed",
2779                                dev->name);
2780                        ret = -EPERM;
2781                        goto out2;
2782                }
2783        }
2784        printk(KERN_INFO "%s: Receive Hashing Offload %s\n", dev->name,
2785               hldev->config.rth_en ? "enabled" : "disabled");
2786
2787        for (i = 0; i < vdev->no_of_vpath; i++) {
2788                vpath = &vdev->vpaths[i];
2789
2790                /* set initial mtu before enabling the device */
2791                status = vxge_hw_vpath_mtu_set(vpath->handle, vdev->mtu);
2792                if (status != VXGE_HW_OK) {
2793                        vxge_debug_init(VXGE_ERR,
2794                                "%s: fatal: can not set new MTU", dev->name);
2795                        ret = -EPERM;
2796                        goto out2;
2797                }
2798        }
2799
2800        VXGE_DEVICE_DEBUG_LEVEL_SET(VXGE_TRACE, VXGE_COMPONENT_LL, vdev);
2801        vxge_debug_init(vdev->level_trace,
2802                "%s: MTU is %d", vdev->ndev->name, vdev->mtu);
2803        VXGE_DEVICE_DEBUG_LEVEL_SET(VXGE_ERR, VXGE_COMPONENT_LL, vdev);
2804
2805        /* Restore the DA, VID table and also multicast and promiscuous mode
2806         * states
2807         */
2808        if (vdev->all_multi_flg) {
2809                for (i = 0; i < vdev->no_of_vpath; i++) {
2810                        vpath = &vdev->vpaths[i];
2811                        vxge_restore_vpath_mac_addr(vpath);
2812                        vxge_restore_vpath_vid_table(vpath);
2813
2814                        status = vxge_hw_vpath_mcast_enable(vpath->handle);
2815                        if (status != VXGE_HW_OK)
2816                                vxge_debug_init(VXGE_ERR,
2817                                        "%s:%d Enabling multicast failed",
2818                                        __func__, __LINE__);
2819                }
2820        }
2821
2822        /* Enable vpath to sniff all unicast/multicast traffic that not
2823         * addressed to them. We allow promiscuous mode for PF only
2824         */
2825
2826        val64 = 0;
2827        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++)
2828                val64 |= VXGE_HW_RXMAC_AUTHORIZE_ALL_ADDR_VP(i);
2829
2830        vxge_hw_mgmt_reg_write(vdev->devh,
2831                vxge_hw_mgmt_reg_type_mrpcim,
2832                0,
2833                (ulong)offsetof(struct vxge_hw_mrpcim_reg,
2834                        rxmac_authorize_all_addr),
2835                val64);
2836
2837        vxge_hw_mgmt_reg_write(vdev->devh,
2838                vxge_hw_mgmt_reg_type_mrpcim,
2839                0,
2840                (ulong)offsetof(struct vxge_hw_mrpcim_reg,
2841                        rxmac_authorize_all_vid),
2842                val64);
2843
2844        vxge_set_multicast(dev);
2845
2846        /* Enabling Bcast and mcast for all vpath */
2847        for (i = 0; i < vdev->no_of_vpath; i++) {
2848                vpath = &vdev->vpaths[i];
2849                status = vxge_hw_vpath_bcast_enable(vpath->handle);
2850                if (status != VXGE_HW_OK)
2851                        vxge_debug_init(VXGE_ERR,
2852                                "%s : Can not enable bcast for vpath "
2853                                "id %d", dev->name, i);
2854                if (vdev->config.addr_learn_en) {
2855                        status = vxge_hw_vpath_mcast_enable(vpath->handle);
2856                        if (status != VXGE_HW_OK)
2857                                vxge_debug_init(VXGE_ERR,
2858                                        "%s : Can not enable mcast for vpath "
2859                                        "id %d", dev->name, i);
2860                }
2861        }
2862
2863        vxge_hw_device_setpause_data(vdev->devh, 0,
2864                vdev->config.tx_pause_enable,
2865                vdev->config.rx_pause_enable);
2866
2867        if (vdev->vp_reset_timer.function == NULL)
2868                vxge_os_timer(&vdev->vp_reset_timer, vxge_poll_vp_reset, vdev,
2869                              HZ / 2);
2870
2871        /* There is no need to check for RxD leak and RxD lookup on Titan1A */
2872        if (vdev->titan1 && vdev->vp_lockup_timer.function == NULL)
2873                vxge_os_timer(&vdev->vp_lockup_timer, vxge_poll_vp_lockup, vdev,
2874                              HZ / 2);
2875
2876        set_bit(__VXGE_STATE_CARD_UP, &vdev->state);
2877
2878        smp_wmb();
2879
2880        if (vxge_hw_device_link_state_get(vdev->devh) == VXGE_HW_LINK_UP) {
2881                netif_carrier_on(vdev->ndev);
2882                netdev_notice(vdev->ndev, "Link Up\n");
2883                vdev->stats.link_up++;
2884        }
2885
2886        vxge_hw_device_intr_enable(vdev->devh);
2887
2888        smp_wmb();
2889
2890        for (i = 0; i < vdev->no_of_vpath; i++) {
2891                vpath = &vdev->vpaths[i];
2892
2893                vxge_hw_vpath_enable(vpath->handle);
2894                smp_wmb();
2895                vxge_hw_vpath_rx_doorbell_init(vpath->handle);
2896        }
2897
2898        netif_tx_start_all_queues(vdev->ndev);
2899
2900        /* configure CI */
2901        vxge_config_ci_for_tti_rti(vdev);
2902
2903        goto out0;
2904
2905out2:
2906        vxge_rem_isr(vdev);
2907
2908        /* Disable napi */
2909        if (vdev->config.intr_type != MSI_X)
2910                napi_disable(&vdev->napi);
2911        else {
2912                for (i = 0; i < vdev->no_of_vpath; i++)
2913                        napi_disable(&vdev->vpaths[i].ring.napi);
2914        }
2915
2916out1:
2917        vxge_close_vpaths(vdev, 0);
2918out0:
2919        vxge_debug_entryexit(VXGE_TRACE,
2920                                "%s: %s:%d  Exiting...",
2921                                dev->name, __func__, __LINE__);
2922        return ret;
2923}
2924
2925/* Loop through the mac address list and delete all the entries */
2926static void vxge_free_mac_add_list(struct vxge_vpath *vpath)
2927{
2928
2929        struct list_head *entry, *next;
2930        if (list_empty(&vpath->mac_addr_list))
2931                return;
2932
2933        list_for_each_safe(entry, next, &vpath->mac_addr_list) {
2934                list_del(entry);
2935                kfree((struct vxge_mac_addrs *)entry);
2936        }
2937}
2938
2939static void vxge_napi_del_all(struct vxgedev *vdev)
2940{
2941        int i;
2942        if (vdev->config.intr_type != MSI_X)
2943                netif_napi_del(&vdev->napi);
2944        else {
2945                for (i = 0; i < vdev->no_of_vpath; i++)
2946                        netif_napi_del(&vdev->vpaths[i].ring.napi);
2947        }
2948}
2949
2950static int do_vxge_close(struct net_device *dev, int do_io)
2951{
2952        enum vxge_hw_status status;
2953        struct vxgedev *vdev;
2954        struct __vxge_hw_device *hldev;
2955        int i;
2956        u64 val64, vpath_vector;
2957        vxge_debug_entryexit(VXGE_TRACE, "%s: %s:%d",
2958                dev->name, __func__, __LINE__);
2959
2960        vdev = netdev_priv(dev);
2961        hldev = pci_get_drvdata(vdev->pdev);
2962
2963        if (unlikely(!is_vxge_card_up(vdev)))
2964                return 0;
2965
2966        /* If vxge_handle_crit_err task is executing,
2967         * wait till it completes. */
2968        while (test_and_set_bit(__VXGE_STATE_RESET_CARD, &vdev->state))
2969                msleep(50);
2970
2971        if (do_io) {
2972                /* Put the vpath back in normal mode */
2973                vpath_vector = vxge_mBIT(vdev->vpaths[0].device_id);
2974                status = vxge_hw_mgmt_reg_read(vdev->devh,
2975                                vxge_hw_mgmt_reg_type_mrpcim,
2976                                0,
2977                                (ulong)offsetof(
2978                                        struct vxge_hw_mrpcim_reg,
2979                                        rts_mgr_cbasin_cfg),
2980                                &val64);
2981                if (status == VXGE_HW_OK) {
2982                        val64 &= ~vpath_vector;
2983                        status = vxge_hw_mgmt_reg_write(vdev->devh,
2984                                        vxge_hw_mgmt_reg_type_mrpcim,
2985                                        0,
2986                                        (ulong)offsetof(
2987                                                struct vxge_hw_mrpcim_reg,
2988                                                rts_mgr_cbasin_cfg),
2989                                        val64);
2990                }
2991
2992                /* Remove the function 0 from promiscuous mode */
2993                vxge_hw_mgmt_reg_write(vdev->devh,
2994                        vxge_hw_mgmt_reg_type_mrpcim,
2995                        0,
2996                        (ulong)offsetof(struct vxge_hw_mrpcim_reg,
2997                                rxmac_authorize_all_addr),
2998                        0);
2999
3000                vxge_hw_mgmt_reg_write(vdev->devh,
3001                        vxge_hw_mgmt_reg_type_mrpcim,
3002                        0,
3003                        (ulong)offsetof(struct vxge_hw_mrpcim_reg,
3004                                rxmac_authorize_all_vid),
3005                        0);
3006
3007                smp_wmb();
3008        }
3009
3010        if (vdev->titan1)
3011                del_timer_sync(&vdev->vp_lockup_timer);
3012
3013        del_timer_sync(&vdev->vp_reset_timer);
3014
3015        if (do_io)
3016                vxge_hw_device_wait_receive_idle(hldev);
3017
3018        clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
3019
3020        /* Disable napi */
3021        if (vdev->config.intr_type != MSI_X)
3022                napi_disable(&vdev->napi);
3023        else {
3024                for (i = 0; i < vdev->no_of_vpath; i++)
3025                        napi_disable(&vdev->vpaths[i].ring.napi);
3026        }
3027
3028        netif_carrier_off(vdev->ndev);
3029        netdev_notice(vdev->ndev, "Link Down\n");
3030        netif_tx_stop_all_queues(vdev->ndev);
3031
3032        /* Note that at this point xmit() is stopped by upper layer */
3033        if (do_io)
3034                vxge_hw_device_intr_disable(vdev->devh);
3035
3036        vxge_rem_isr(vdev);
3037
3038        vxge_napi_del_all(vdev);
3039
3040        if (do_io)
3041                vxge_reset_all_vpaths(vdev);
3042
3043        vxge_close_vpaths(vdev, 0);
3044
3045        vxge_debug_entryexit(VXGE_TRACE,
3046                "%s: %s:%d  Exiting...", dev->name, __func__, __LINE__);
3047
3048        clear_bit(__VXGE_STATE_RESET_CARD, &vdev->state);
3049
3050        return 0;
3051}
3052
3053/**
3054 * vxge_close
3055 * @dev: device pointer.
3056 *
3057 * This is the stop entry point of the driver. It needs to undo exactly
3058 * whatever was done by the open entry point, thus it's usually referred to
3059 * as the close function.Among other things this function mainly stops the
3060 * Rx side of the NIC and frees all the Rx buffers in the Rx rings.
3061 * Return value: '0' on success and an appropriate (-)ve integer as
3062 * defined in errno.h file on failure.
3063 */
3064static int vxge_close(struct net_device *dev)
3065{
3066        do_vxge_close(dev, 1);
3067        return 0;
3068}
3069
3070/**
3071 * vxge_change_mtu
3072 * @dev: net device pointer.
3073 * @new_mtu :the new MTU size for the device.
3074 *
3075 * A driver entry point to change MTU size for the device. Before changing
3076 * the MTU the device must be stopped.
3077 */
3078static int vxge_change_mtu(struct net_device *dev, int new_mtu)
3079{
3080        struct vxgedev *vdev = netdev_priv(dev);
3081
3082        vxge_debug_entryexit(vdev->level_trace,
3083                "%s:%d", __func__, __LINE__);
3084        if ((new_mtu < VXGE_HW_MIN_MTU) || (new_mtu > VXGE_HW_MAX_MTU)) {
3085                vxge_debug_init(vdev->level_err,
3086                        "%s: mtu size is invalid", dev->name);
3087                return -EPERM;
3088        }
3089
3090        /* check if device is down already */
3091        if (unlikely(!is_vxge_card_up(vdev))) {
3092                /* just store new value, will use later on open() */
3093                dev->mtu = new_mtu;
3094                vxge_debug_init(vdev->level_err,
3095                        "%s", "device is down on MTU change");
3096                return 0;
3097        }
3098
3099        vxge_debug_init(vdev->level_trace,
3100                "trying to apply new MTU %d", new_mtu);
3101
3102        if (vxge_close(dev))
3103                return -EIO;
3104
3105        dev->mtu = new_mtu;
3106        vdev->mtu = new_mtu;
3107
3108        if (vxge_open(dev))
3109                return -EIO;
3110
3111        vxge_debug_init(vdev->level_trace,
3112                "%s: MTU changed to %d", vdev->ndev->name, new_mtu);
3113
3114        vxge_debug_entryexit(vdev->level_trace,
3115                "%s:%d  Exiting...", __func__, __LINE__);
3116
3117        return 0;
3118}
3119
3120/**
3121 * vxge_get_stats64
3122 * @dev: pointer to the device structure
3123 * @stats: pointer to struct rtnl_link_stats64
3124 *
3125 */
3126static struct rtnl_link_stats64 *
3127vxge_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *net_stats)
3128{
3129        struct vxgedev *vdev = netdev_priv(dev);
3130        int k;
3131
3132        /* net_stats already zeroed by caller */
3133        for (k = 0; k < vdev->no_of_vpath; k++) {
3134                struct vxge_ring_stats *rxstats = &vdev->vpaths[k].ring.stats;
3135                struct vxge_fifo_stats *txstats = &vdev->vpaths[k].fifo.stats;
3136                unsigned int start;
3137                u64 packets, bytes, multicast;
3138
3139                do {
3140                        start = u64_stats_fetch_begin_irq(&rxstats->syncp);
3141
3142                        packets   = rxstats->rx_frms;
3143                        multicast = rxstats->rx_mcast;
3144                        bytes     = rxstats->rx_bytes;
3145                } while (u64_stats_fetch_retry_irq(&rxstats->syncp, start));
3146
3147                net_stats->rx_packets += packets;
3148                net_stats->rx_bytes += bytes;
3149                net_stats->multicast += multicast;
3150
3151                net_stats->rx_errors += rxstats->rx_errors;
3152                net_stats->rx_dropped += rxstats->rx_dropped;
3153
3154                do {
3155                        start = u64_stats_fetch_begin_irq(&txstats->syncp);
3156
3157                        packets = txstats->tx_frms;
3158                        bytes   = txstats->tx_bytes;
3159                } while (u64_stats_fetch_retry_irq(&txstats->syncp, start));
3160
3161                net_stats->tx_packets += packets;
3162                net_stats->tx_bytes += bytes;
3163                net_stats->tx_errors += txstats->tx_errors;
3164        }
3165
3166        return net_stats;
3167}
3168
3169static enum vxge_hw_status vxge_timestamp_config(struct __vxge_hw_device *devh)
3170{
3171        enum vxge_hw_status status;
3172        u64 val64;
3173
3174        /* Timestamp is passed to the driver via the FCS, therefore we
3175         * must disable the FCS stripping by the adapter.  Since this is
3176         * required for the driver to load (due to a hardware bug),
3177         * there is no need to do anything special here.
3178         */
3179        val64 = VXGE_HW_XMAC_TIMESTAMP_EN |
3180                VXGE_HW_XMAC_TIMESTAMP_USE_LINK_ID(0) |
3181                VXGE_HW_XMAC_TIMESTAMP_INTERVAL(0);
3182
3183        status = vxge_hw_mgmt_reg_write(devh,
3184                                        vxge_hw_mgmt_reg_type_mrpcim,
3185                                        0,
3186                                        offsetof(struct vxge_hw_mrpcim_reg,
3187                                                 xmac_timestamp),
3188                                        val64);
3189        vxge_hw_device_flush_io(devh);
3190        devh->config.hwts_en = VXGE_HW_HWTS_ENABLE;
3191        return status;
3192}
3193
3194static int vxge_hwtstamp_set(struct vxgedev *vdev, void __user *data)
3195{
3196        struct hwtstamp_config config;
3197        int i;
3198
3199        if (copy_from_user(&config, data, sizeof(config)))
3200                return -EFAULT;
3201
3202        /* reserved for future extensions */
3203        if (config.flags)
3204                return -EINVAL;
3205
3206        /* Transmit HW Timestamp not supported */
3207        switch (config.tx_type) {
3208        case HWTSTAMP_TX_OFF:
3209                break;
3210        case HWTSTAMP_TX_ON:
3211        default:
3212                return -ERANGE;
3213        }
3214
3215        switch (config.rx_filter) {
3216        case HWTSTAMP_FILTER_NONE:
3217                vdev->rx_hwts = 0;
3218                config.rx_filter = HWTSTAMP_FILTER_NONE;
3219                break;
3220
3221        case HWTSTAMP_FILTER_ALL:
3222        case HWTSTAMP_FILTER_SOME:
3223        case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
3224        case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
3225        case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
3226        case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
3227        case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
3228        case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
3229        case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
3230        case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
3231        case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
3232        case HWTSTAMP_FILTER_PTP_V2_EVENT:
3233        case HWTSTAMP_FILTER_PTP_V2_SYNC:
3234        case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
3235                if (vdev->devh->config.hwts_en != VXGE_HW_HWTS_ENABLE)
3236                        return -EFAULT;
3237
3238                vdev->rx_hwts = 1;
3239                config.rx_filter = HWTSTAMP_FILTER_ALL;
3240                break;
3241
3242        default:
3243                 return -ERANGE;
3244        }
3245
3246        for (i = 0; i < vdev->no_of_vpath; i++)
3247                vdev->vpaths[i].ring.rx_hwts = vdev->rx_hwts;
3248
3249        if (copy_to_user(data, &config, sizeof(config)))
3250                return -EFAULT;
3251
3252        return 0;
3253}
3254
3255static int vxge_hwtstamp_get(struct vxgedev *vdev, void __user *data)
3256{
3257        struct hwtstamp_config config;
3258
3259        config.flags = 0;
3260        config.tx_type = HWTSTAMP_TX_OFF;
3261        config.rx_filter = (vdev->rx_hwts ?
3262                            HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE);
3263
3264        if (copy_to_user(data, &config, sizeof(config)))
3265                return -EFAULT;
3266
3267        return 0;
3268}
3269
3270/**
3271 * vxge_ioctl
3272 * @dev: Device pointer.
3273 * @ifr: An IOCTL specific structure, that can contain a pointer to
3274 *       a proprietary structure used to pass information to the driver.
3275 * @cmd: This is used to distinguish between the different commands that
3276 *       can be passed to the IOCTL functions.
3277 *
3278 * Entry point for the Ioctl.
3279 */
3280static int vxge_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
3281{
3282        struct vxgedev *vdev = netdev_priv(dev);
3283
3284        switch (cmd) {
3285        case SIOCSHWTSTAMP:
3286                return vxge_hwtstamp_set(vdev, rq->ifr_data);
3287        case SIOCGHWTSTAMP:
3288                return vxge_hwtstamp_get(vdev, rq->ifr_data);
3289        default:
3290                return -EOPNOTSUPP;
3291        }
3292}
3293
3294/**
3295 * vxge_tx_watchdog
3296 * @dev: pointer to net device structure
3297 *
3298 * Watchdog for transmit side.
3299 * This function is triggered if the Tx Queue is stopped
3300 * for a pre-defined amount of time when the Interface is still up.
3301 */
3302static void vxge_tx_watchdog(struct net_device *dev)
3303{
3304        struct vxgedev *vdev;
3305
3306        vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);
3307
3308        vdev = netdev_priv(dev);
3309
3310        vdev->cric_err_event = VXGE_HW_EVENT_RESET_START;
3311
3312        schedule_work(&vdev->reset_task);
3313        vxge_debug_entryexit(VXGE_TRACE,
3314                "%s:%d  Exiting...", __func__, __LINE__);
3315}
3316
3317/**
3318 * vxge_vlan_rx_add_vid
3319 * @dev: net device pointer.
3320 * @proto: vlan protocol
3321 * @vid: vid
3322 *
3323 * Add the vlan id to the devices vlan id table
3324 */
3325static int
3326vxge_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
3327{
3328        struct vxgedev *vdev = netdev_priv(dev);
3329        struct vxge_vpath *vpath;
3330        int vp_id;
3331
3332        /* Add these vlan to the vid table */
3333        for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
3334                vpath = &vdev->vpaths[vp_id];
3335                if (!vpath->is_open)
3336                        continue;
3337                vxge_hw_vpath_vid_add(vpath->handle, vid);
3338        }
3339        set_bit(vid, vdev->active_vlans);
3340        return 0;
3341}
3342
3343/**
3344 * vxge_vlan_rx_kill_vid
3345 * @dev: net device pointer.
3346 * @proto: vlan protocol
3347 * @vid: vid
3348 *
3349 * Remove the vlan id from the device's vlan id table
3350 */
3351static int
3352vxge_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
3353{
3354        struct vxgedev *vdev = netdev_priv(dev);
3355        struct vxge_vpath *vpath;
3356        int vp_id;
3357
3358        vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);
3359
3360        /* Delete this vlan from the vid table */
3361        for (vp_id = 0; vp_id < vdev->no_of_vpath; vp_id++) {
3362                vpath = &vdev->vpaths[vp_id];
3363                if (!vpath->is_open)
3364                        continue;
3365                vxge_hw_vpath_vid_delete(vpath->handle, vid);
3366        }
3367        vxge_debug_entryexit(VXGE_TRACE,
3368                "%s:%d  Exiting...", __func__, __LINE__);
3369        clear_bit(vid, vdev->active_vlans);
3370        return 0;
3371}
3372
3373static const struct net_device_ops vxge_netdev_ops = {
3374        .ndo_open               = vxge_open,
3375        .ndo_stop               = vxge_close,
3376        .ndo_get_stats64        = vxge_get_stats64,
3377        .ndo_start_xmit         = vxge_xmit,
3378        .ndo_validate_addr      = eth_validate_addr,
3379        .ndo_set_rx_mode        = vxge_set_multicast,
3380        .ndo_do_ioctl           = vxge_ioctl,
3381        .ndo_set_mac_address    = vxge_set_mac_addr,
3382        .ndo_change_mtu         = vxge_change_mtu,
3383        .ndo_fix_features       = vxge_fix_features,
3384        .ndo_set_features       = vxge_set_features,
3385        .ndo_vlan_rx_kill_vid   = vxge_vlan_rx_kill_vid,
3386        .ndo_vlan_rx_add_vid    = vxge_vlan_rx_add_vid,
3387        .ndo_tx_timeout         = vxge_tx_watchdog,
3388#ifdef CONFIG_NET_POLL_CONTROLLER
3389        .ndo_poll_controller    = vxge_netpoll,
3390#endif
3391};
3392
3393static int vxge_device_register(struct __vxge_hw_device *hldev,
3394                                struct vxge_config *config, int high_dma,
3395                                int no_of_vpath, struct vxgedev **vdev_out)
3396{
3397        struct net_device *ndev;
3398        enum vxge_hw_status status = VXGE_HW_OK;
3399        struct vxgedev *vdev;
3400        int ret = 0, no_of_queue = 1;
3401        u64 stat;
3402
3403        *vdev_out = NULL;
3404        if (config->tx_steering_type)
3405                no_of_queue = no_of_vpath;
3406
3407        ndev = alloc_etherdev_mq(sizeof(struct vxgedev),
3408                        no_of_queue);
3409        if (ndev == NULL) {
3410                vxge_debug_init(
3411                        vxge_hw_device_trace_level_get(hldev),
3412                "%s : device allocation failed", __func__);
3413                ret = -ENODEV;
3414                goto _out0;
3415        }
3416
3417        vxge_debug_entryexit(
3418                vxge_hw_device_trace_level_get(hldev),
3419                "%s: %s:%d  Entering...",
3420                ndev->name, __func__, __LINE__);
3421
3422        vdev = netdev_priv(ndev);
3423        memset(vdev, 0, sizeof(struct vxgedev));
3424
3425        vdev->ndev = ndev;
3426        vdev->devh = hldev;
3427        vdev->pdev = hldev->pdev;
3428        memcpy(&vdev->config, config, sizeof(struct vxge_config));
3429        vdev->rx_hwts = 0;
3430        vdev->titan1 = (vdev->pdev->revision == VXGE_HW_TITAN1_PCI_REVISION);
3431
3432        SET_NETDEV_DEV(ndev, &vdev->pdev->dev);
3433
3434        ndev->hw_features = NETIF_F_RXCSUM | NETIF_F_SG |
3435                NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
3436                NETIF_F_TSO | NETIF_F_TSO6 |
3437                NETIF_F_HW_VLAN_CTAG_TX;
3438        if (vdev->config.rth_steering != NO_STEERING)
3439                ndev->hw_features |= NETIF_F_RXHASH;
3440
3441        ndev->features |= ndev->hw_features |
3442                NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_FILTER;
3443
3444
3445        ndev->netdev_ops = &vxge_netdev_ops;
3446
3447        ndev->watchdog_timeo = VXGE_LL_WATCH_DOG_TIMEOUT;
3448        INIT_WORK(&vdev->reset_task, vxge_reset);
3449
3450        vxge_initialize_ethtool_ops(ndev);
3451
3452        /* Allocate memory for vpath */
3453        vdev->vpaths = kzalloc((sizeof(struct vxge_vpath)) *
3454                                no_of_vpath, GFP_KERNEL);
3455        if (!vdev->vpaths) {
3456                vxge_debug_init(VXGE_ERR,
3457                        "%s: vpath memory allocation failed",
3458                        vdev->ndev->name);
3459                ret = -ENOMEM;
3460                goto _out1;
3461        }
3462
3463        vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
3464                "%s : checksumming enabled", __func__);
3465
3466        if (high_dma) {
3467                ndev->features |= NETIF_F_HIGHDMA;
3468                vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
3469                        "%s : using High DMA", __func__);
3470        }
3471
3472        ret = register_netdev(ndev);
3473        if (ret) {
3474                vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
3475                        "%s: %s : device registration failed!",
3476                        ndev->name, __func__);
3477                goto _out2;
3478        }
3479
3480        /*  Set the factory defined MAC address initially */
3481        ndev->addr_len = ETH_ALEN;
3482
3483        /* Make Link state as off at this point, when the Link change
3484         * interrupt comes the state will be automatically changed to
3485         * the right state.
3486         */
3487        netif_carrier_off(ndev);
3488
3489        vxge_debug_init(vxge_hw_device_trace_level_get(hldev),
3490                "%s: Ethernet device registered",
3491                ndev->name);
3492
3493        hldev->ndev = ndev;
3494        *vdev_out = vdev;
3495
3496        /* Resetting the Device stats */
3497        status = vxge_hw_mrpcim_stats_access(
3498                                hldev,
3499                                VXGE_HW_STATS_OP_CLEAR_ALL_STATS,
3500                                0,
3501                                0,
3502                                &stat);
3503
3504        if (status == VXGE_HW_ERR_PRIVILAGED_OPEARATION)
3505                vxge_debug_init(
3506                        vxge_hw_device_trace_level_get(hldev),
3507                        "%s: device stats clear returns"
3508                        "VXGE_HW_ERR_PRIVILAGED_OPEARATION", ndev->name);
3509
3510        vxge_debug_entryexit(vxge_hw_device_trace_level_get(hldev),
3511                "%s: %s:%d  Exiting...",
3512                ndev->name, __func__, __LINE__);
3513
3514        return ret;
3515_out2:
3516        kfree(vdev->vpaths);
3517_out1:
3518        free_netdev(ndev);
3519_out0:
3520        return ret;
3521}
3522
3523/*
3524 * vxge_device_unregister
3525 *
3526 * This function will unregister and free network device
3527 */
3528static void vxge_device_unregister(struct __vxge_hw_device *hldev)
3529{
3530        struct vxgedev *vdev;
3531        struct net_device *dev;
3532        char buf[IFNAMSIZ];
3533
3534        dev = hldev->ndev;
3535        vdev = netdev_priv(dev);
3536
3537        vxge_debug_entryexit(vdev->level_trace, "%s: %s:%d", vdev->ndev->name,
3538                             __func__, __LINE__);
3539
3540        strlcpy(buf, dev->name, IFNAMSIZ);
3541
3542        flush_work(&vdev->reset_task);
3543
3544        /* in 2.6 will call stop() if device is up */
3545        unregister_netdev(dev);
3546
3547        kfree(vdev->vpaths);
3548
3549        /* we are safe to free it now */
3550        free_netdev(dev);
3551
3552        vxge_debug_init(vdev->level_trace, "%s: ethernet device unregistered",
3553                        buf);
3554        vxge_debug_entryexit(vdev->level_trace, "%s: %s:%d  Exiting...", buf,
3555                             __func__, __LINE__);
3556}
3557
3558/*
3559 * vxge_callback_crit_err
3560 *
3561 * This function is called by the alarm handler in interrupt context.
3562 * Driver must analyze it based on the event type.
3563 */
3564static void
3565vxge_callback_crit_err(struct __vxge_hw_device *hldev,
3566                        enum vxge_hw_event type, u64 vp_id)
3567{
3568        struct net_device *dev = hldev->ndev;
3569        struct vxgedev *vdev = netdev_priv(dev);
3570        struct vxge_vpath *vpath = NULL;
3571        int vpath_idx;
3572
3573        vxge_debug_entryexit(vdev->level_trace,
3574                "%s: %s:%d", vdev->ndev->name, __func__, __LINE__);
3575
3576        /* Note: This event type should be used for device wide
3577         * indications only - Serious errors, Slot freeze and critical errors
3578         */
3579        vdev->cric_err_event = type;
3580
3581        for (vpath_idx = 0; vpath_idx < vdev->no_of_vpath; vpath_idx++) {
3582                vpath = &vdev->vpaths[vpath_idx];
3583                if (vpath->device_id == vp_id)
3584                        break;
3585        }
3586
3587        if (!test_bit(__VXGE_STATE_RESET_CARD, &vdev->state)) {
3588                if (type == VXGE_HW_EVENT_SLOT_FREEZE) {
3589                        vxge_debug_init(VXGE_ERR,
3590                                "%s: Slot is frozen", vdev->ndev->name);
3591                } else if (type == VXGE_HW_EVENT_SERR) {
3592                        vxge_debug_init(VXGE_ERR,
3593                                "%s: Encountered Serious Error",
3594                                vdev->ndev->name);
3595                } else if (type == VXGE_HW_EVENT_CRITICAL_ERR)
3596                        vxge_debug_init(VXGE_ERR,
3597                                "%s: Encountered Critical Error",
3598                                vdev->ndev->name);
3599        }
3600
3601        if ((type == VXGE_HW_EVENT_SERR) ||
3602                (type == VXGE_HW_EVENT_SLOT_FREEZE)) {
3603                if (unlikely(vdev->exec_mode))
3604                        clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
3605        } else if (type == VXGE_HW_EVENT_CRITICAL_ERR) {
3606                vxge_hw_device_mask_all(hldev);
3607                if (unlikely(vdev->exec_mode))
3608                        clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
3609        } else if ((type == VXGE_HW_EVENT_FIFO_ERR) ||
3610                  (type == VXGE_HW_EVENT_VPATH_ERR)) {
3611
3612                if (unlikely(vdev->exec_mode))
3613                        clear_bit(__VXGE_STATE_CARD_UP, &vdev->state);
3614                else {
3615                        /* check if this vpath is already set for reset */
3616                        if (!test_and_set_bit(vpath_idx, &vdev->vp_reset)) {
3617
3618                                /* disable interrupts for this vpath */
3619                                vxge_vpath_intr_disable(vdev, vpath_idx);
3620
3621                                /* stop the queue for this vpath */
3622                                netif_tx_stop_queue(vpath->fifo.txq);
3623                        }
3624                }
3625        }
3626
3627        vxge_debug_entryexit(vdev->level_trace,
3628                "%s: %s:%d  Exiting...",
3629                vdev->ndev->name, __func__, __LINE__);
3630}
3631
3632static void verify_bandwidth(void)
3633{
3634        int i, band_width, total = 0, equal_priority = 0;
3635
3636        /* 1. If user enters 0 for some fifo, give equal priority to all */
3637        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
3638                if (bw_percentage[i] == 0) {
3639                        equal_priority = 1;
3640                        break;
3641                }
3642        }
3643
3644        if (!equal_priority) {
3645                /* 2. If sum exceeds 100, give equal priority to all */
3646                for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
3647                        if (bw_percentage[i] == 0xFF)
3648                                break;
3649
3650                        total += bw_percentage[i];
3651                        if (total > VXGE_HW_VPATH_BANDWIDTH_MAX) {
3652                                equal_priority = 1;
3653                                break;
3654                        }
3655                }
3656        }
3657
3658        if (!equal_priority) {
3659                /* Is all the bandwidth consumed? */
3660                if (total < VXGE_HW_VPATH_BANDWIDTH_MAX) {
3661                        if (i < VXGE_HW_MAX_VIRTUAL_PATHS) {
3662                                /* Split rest of bw equally among next VPs*/
3663                                band_width =
3664                                  (VXGE_HW_VPATH_BANDWIDTH_MAX  - total) /
3665                                        (VXGE_HW_MAX_VIRTUAL_PATHS - i);
3666                                if (band_width < 2) /* min of 2% */
3667                                        equal_priority = 1;
3668                                else {
3669                                        for (; i < VXGE_HW_MAX_VIRTUAL_PATHS;
3670                                                i++)
3671                                                bw_percentage[i] =
3672                                                        band_width;
3673                                }
3674                        }
3675                } else if (i < VXGE_HW_MAX_VIRTUAL_PATHS)
3676                        equal_priority = 1;
3677        }
3678
3679        if (equal_priority) {
3680                vxge_debug_init(VXGE_ERR,
3681                        "%s: Assigning equal bandwidth to all the vpaths",
3682                        VXGE_DRIVER_NAME);
3683                bw_percentage[0] = VXGE_HW_VPATH_BANDWIDTH_MAX /
3684                                        VXGE_HW_MAX_VIRTUAL_PATHS;
3685                for (i = 1; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++)
3686                        bw_percentage[i] = bw_percentage[0];
3687        }
3688}
3689
3690/*
3691 * Vpath configuration
3692 */
3693static int vxge_config_vpaths(struct vxge_hw_device_config *device_config,
3694                              u64 vpath_mask, struct vxge_config *config_param)
3695{
3696        int i, no_of_vpaths = 0, default_no_vpath = 0, temp;
3697        u32 txdl_size, txdl_per_memblock;
3698
3699        temp = driver_config->vpath_per_dev;
3700        if ((driver_config->vpath_per_dev == VXGE_USE_DEFAULT) &&
3701                (max_config_dev == VXGE_MAX_CONFIG_DEV)) {
3702                /* No more CPU. Return vpath number as zero.*/
3703                if (driver_config->g_no_cpus == -1)
3704                        return 0;
3705
3706                if (!driver_config->g_no_cpus)
3707                        driver_config->g_no_cpus =
3708                                netif_get_num_default_rss_queues();
3709
3710                driver_config->vpath_per_dev = driver_config->g_no_cpus >> 1;
3711                if (!driver_config->vpath_per_dev)
3712                        driver_config->vpath_per_dev = 1;
3713
3714                for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++)
3715                        if (!vxge_bVALn(vpath_mask, i, 1))
3716                                continue;
3717                        else
3718                                default_no_vpath++;
3719                if (default_no_vpath < driver_config->vpath_per_dev)
3720                        driver_config->vpath_per_dev = default_no_vpath;
3721
3722                driver_config->g_no_cpus = driver_config->g_no_cpus -
3723                                (driver_config->vpath_per_dev * 2);
3724                if (driver_config->g_no_cpus <= 0)
3725                        driver_config->g_no_cpus = -1;
3726        }
3727
3728        if (driver_config->vpath_per_dev == 1) {
3729                vxge_debug_ll_config(VXGE_TRACE,
3730                        "%s: Disable tx and rx steering, "
3731                        "as single vpath is configured", VXGE_DRIVER_NAME);
3732                config_param->rth_steering = NO_STEERING;
3733                config_param->tx_steering_type = NO_STEERING;
3734                device_config->rth_en = 0;
3735        }
3736
3737        /* configure bandwidth */
3738        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++)
3739                device_config->vp_config[i].min_bandwidth = bw_percentage[i];
3740
3741        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
3742                device_config->vp_config[i].vp_id = i;
3743                device_config->vp_config[i].mtu = VXGE_HW_DEFAULT_MTU;
3744                if (no_of_vpaths < driver_config->vpath_per_dev) {
3745                        if (!vxge_bVALn(vpath_mask, i, 1)) {
3746                                vxge_debug_ll_config(VXGE_TRACE,
3747                                        "%s: vpath: %d is not available",
3748                                        VXGE_DRIVER_NAME, i);
3749                                continue;
3750                        } else {
3751                                vxge_debug_ll_config(VXGE_TRACE,
3752                                        "%s: vpath: %d available",
3753                                        VXGE_DRIVER_NAME, i);
3754                                no_of_vpaths++;
3755                        }
3756                } else {
3757                        vxge_debug_ll_config(VXGE_TRACE,
3758                                "%s: vpath: %d is not configured, "
3759                                "max_config_vpath exceeded",
3760                                VXGE_DRIVER_NAME, i);
3761                        break;
3762                }
3763
3764                /* Configure Tx fifo's */
3765                device_config->vp_config[i].fifo.enable =
3766                                                VXGE_HW_FIFO_ENABLE;
3767                device_config->vp_config[i].fifo.max_frags =
3768                                MAX_SKB_FRAGS + 1;
3769                device_config->vp_config[i].fifo.memblock_size =
3770                        VXGE_HW_MIN_FIFO_MEMBLOCK_SIZE;
3771
3772                txdl_size = device_config->vp_config[i].fifo.max_frags *
3773                                sizeof(struct vxge_hw_fifo_txd);
3774                txdl_per_memblock = VXGE_HW_MIN_FIFO_MEMBLOCK_SIZE / txdl_size;
3775
3776                device_config->vp_config[i].fifo.fifo_blocks =
3777                        ((VXGE_DEF_FIFO_LENGTH - 1) / txdl_per_memblock) + 1;
3778
3779                device_config->vp_config[i].fifo.intr =
3780                                VXGE_HW_FIFO_QUEUE_INTR_DISABLE;
3781
3782                /* Configure tti properties */
3783                device_config->vp_config[i].tti.intr_enable =
3784                                        VXGE_HW_TIM_INTR_ENABLE;
3785
3786                device_config->vp_config[i].tti.btimer_val =
3787                        (VXGE_TTI_BTIMER_VAL * 1000) / 272;
3788
3789                device_config->vp_config[i].tti.timer_ac_en =
3790                                VXGE_HW_TIM_TIMER_AC_ENABLE;
3791
3792                /* For msi-x with napi (each vector has a handler of its own) -
3793                 * Set CI to OFF for all vpaths
3794                 */
3795                device_config->vp_config[i].tti.timer_ci_en =
3796                        VXGE_HW_TIM_TIMER_CI_DISABLE;
3797
3798                device_config->vp_config[i].tti.timer_ri_en =
3799                                VXGE_HW_TIM_TIMER_RI_DISABLE;
3800
3801                device_config->vp_config[i].tti.util_sel =
3802                        VXGE_HW_TIM_UTIL_SEL_LEGACY_TX_NET_UTIL;
3803
3804                device_config->vp_config[i].tti.ltimer_val =
3805                        (VXGE_TTI_LTIMER_VAL * 1000) / 272;
3806
3807                device_config->vp_config[i].tti.rtimer_val =
3808                        (VXGE_TTI_RTIMER_VAL * 1000) / 272;
3809
3810                device_config->vp_config[i].tti.urange_a = TTI_TX_URANGE_A;
3811                device_config->vp_config[i].tti.urange_b = TTI_TX_URANGE_B;
3812                device_config->vp_config[i].tti.urange_c = TTI_TX_URANGE_C;
3813                device_config->vp_config[i].tti.uec_a = TTI_TX_UFC_A;
3814                device_config->vp_config[i].tti.uec_b = TTI_TX_UFC_B;
3815                device_config->vp_config[i].tti.uec_c = TTI_TX_UFC_C;
3816                device_config->vp_config[i].tti.uec_d = TTI_TX_UFC_D;
3817
3818                /* Configure Rx rings */
3819                device_config->vp_config[i].ring.enable  =
3820                                                VXGE_HW_RING_ENABLE;
3821
3822                device_config->vp_config[i].ring.ring_blocks  =
3823                                                VXGE_HW_DEF_RING_BLOCKS;
3824
3825                device_config->vp_config[i].ring.buffer_mode =
3826                        VXGE_HW_RING_RXD_BUFFER_MODE_1;
3827
3828                device_config->vp_config[i].ring.rxds_limit  =
3829                                VXGE_HW_DEF_RING_RXDS_LIMIT;
3830
3831                device_config->vp_config[i].ring.scatter_mode =
3832                                        VXGE_HW_RING_SCATTER_MODE_A;
3833
3834                /* Configure rti properties */
3835                device_config->vp_config[i].rti.intr_enable =
3836                                        VXGE_HW_TIM_INTR_ENABLE;
3837
3838                device_config->vp_config[i].rti.btimer_val =
3839                        (VXGE_RTI_BTIMER_VAL * 1000)/272;
3840
3841                device_config->vp_config[i].rti.timer_ac_en =
3842                                                VXGE_HW_TIM_TIMER_AC_ENABLE;
3843
3844                device_config->vp_config[i].rti.timer_ci_en =
3845                                                VXGE_HW_TIM_TIMER_CI_DISABLE;
3846
3847                device_config->vp_config[i].rti.timer_ri_en =
3848                                                VXGE_HW_TIM_TIMER_RI_DISABLE;
3849
3850                device_config->vp_config[i].rti.util_sel =
3851                                VXGE_HW_TIM_UTIL_SEL_LEGACY_RX_NET_UTIL;
3852
3853                device_config->vp_config[i].rti.urange_a =
3854                                                RTI_RX_URANGE_A;
3855                device_config->vp_config[i].rti.urange_b =
3856                                                RTI_RX_URANGE_B;
3857                device_config->vp_config[i].rti.urange_c =
3858                                                RTI_RX_URANGE_C;
3859                device_config->vp_config[i].rti.uec_a = RTI_RX_UFC_A;
3860                device_config->vp_config[i].rti.uec_b = RTI_RX_UFC_B;
3861                device_config->vp_config[i].rti.uec_c = RTI_RX_UFC_C;
3862                device_config->vp_config[i].rti.uec_d = RTI_RX_UFC_D;
3863
3864                device_config->vp_config[i].rti.rtimer_val =
3865                        (VXGE_RTI_RTIMER_VAL * 1000) / 272;
3866
3867                device_config->vp_config[i].rti.ltimer_val =
3868                        (VXGE_RTI_LTIMER_VAL * 1000) / 272;
3869
3870                device_config->vp_config[i].rpa_strip_vlan_tag =
3871                        vlan_tag_strip;
3872        }
3873
3874        driver_config->vpath_per_dev = temp;
3875        return no_of_vpaths;
3876}
3877
3878/* initialize device configuratrions */
3879static void vxge_device_config_init(struct vxge_hw_device_config *device_config,
3880                                    int *intr_type)
3881{
3882        /* Used for CQRQ/SRQ. */
3883        device_config->dma_blockpool_initial =
3884                        VXGE_HW_INITIAL_DMA_BLOCK_POOL_SIZE;
3885
3886        device_config->dma_blockpool_max =
3887                        VXGE_HW_MAX_DMA_BLOCK_POOL_SIZE;
3888
3889        if (max_mac_vpath > VXGE_MAX_MAC_ADDR_COUNT)
3890                max_mac_vpath = VXGE_MAX_MAC_ADDR_COUNT;
3891
3892#ifndef CONFIG_PCI_MSI
3893        vxge_debug_init(VXGE_ERR,
3894                "%s: This Kernel does not support "
3895                "MSI-X. Defaulting to INTA", VXGE_DRIVER_NAME);
3896        *intr_type = INTA;
3897#endif
3898
3899        /* Configure whether MSI-X or IRQL. */
3900        switch (*intr_type) {
3901        case INTA:
3902                device_config->intr_mode = VXGE_HW_INTR_MODE_IRQLINE;
3903                break;
3904
3905        case MSI_X:
3906                device_config->intr_mode = VXGE_HW_INTR_MODE_MSIX_ONE_SHOT;
3907                break;
3908        }
3909
3910        /* Timer period between device poll */
3911        device_config->device_poll_millis = VXGE_TIMER_DELAY;
3912
3913        /* Configure mac based steering. */
3914        device_config->rts_mac_en = addr_learn_en;
3915
3916        /* Configure Vpaths */
3917        device_config->rth_it_type = VXGE_HW_RTH_IT_TYPE_MULTI_IT;
3918
3919        vxge_debug_ll_config(VXGE_TRACE, "%s : Device Config Params ",
3920                        __func__);
3921        vxge_debug_ll_config(VXGE_TRACE, "intr_mode : %d",
3922                        device_config->intr_mode);
3923        vxge_debug_ll_config(VXGE_TRACE, "device_poll_millis : %d",
3924                        device_config->device_poll_millis);
3925        vxge_debug_ll_config(VXGE_TRACE, "rth_en : %d",
3926                        device_config->rth_en);
3927        vxge_debug_ll_config(VXGE_TRACE, "rth_it_type : %d",
3928                        device_config->rth_it_type);
3929}
3930
3931static void vxge_print_parm(struct vxgedev *vdev, u64 vpath_mask)
3932{
3933        int i;
3934
3935        vxge_debug_init(VXGE_TRACE,
3936                "%s: %d Vpath(s) opened",
3937                vdev->ndev->name, vdev->no_of_vpath);
3938
3939        switch (vdev->config.intr_type) {
3940        case INTA:
3941                vxge_debug_init(VXGE_TRACE,
3942                        "%s: Interrupt type INTA", vdev->ndev->name);
3943                break;
3944
3945        case MSI_X:
3946                vxge_debug_init(VXGE_TRACE,
3947                        "%s: Interrupt type MSI-X", vdev->ndev->name);
3948                break;
3949        }
3950
3951        if (vdev->config.rth_steering) {
3952                vxge_debug_init(VXGE_TRACE,
3953                        "%s: RTH steering enabled for TCP_IPV4",
3954                        vdev->ndev->name);
3955        } else {
3956                vxge_debug_init(VXGE_TRACE,
3957                        "%s: RTH steering disabled", vdev->ndev->name);
3958        }
3959
3960        switch (vdev->config.tx_steering_type) {
3961        case NO_STEERING:
3962                vxge_debug_init(VXGE_TRACE,
3963                        "%s: Tx steering disabled", vdev->ndev->name);
3964                break;
3965        case TX_PRIORITY_STEERING:
3966                vxge_debug_init(VXGE_TRACE,
3967                        "%s: Unsupported tx steering option",
3968                        vdev->ndev->name);
3969                vxge_debug_init(VXGE_TRACE,
3970                        "%s: Tx steering disabled", vdev->ndev->name);
3971                vdev->config.tx_steering_type = 0;
3972                break;
3973        case TX_VLAN_STEERING:
3974                vxge_debug_init(VXGE_TRACE,
3975                        "%s: Unsupported tx steering option",
3976                        vdev->ndev->name);
3977                vxge_debug_init(VXGE_TRACE,
3978                        "%s: Tx steering disabled", vdev->ndev->name);
3979                vdev->config.tx_steering_type = 0;
3980                break;
3981        case TX_MULTIQ_STEERING:
3982                vxge_debug_init(VXGE_TRACE,
3983                        "%s: Tx multiqueue steering enabled",
3984                        vdev->ndev->name);
3985                break;
3986        case TX_PORT_STEERING:
3987                vxge_debug_init(VXGE_TRACE,
3988                        "%s: Tx port steering enabled",
3989                        vdev->ndev->name);
3990                break;
3991        default:
3992                vxge_debug_init(VXGE_ERR,
3993                        "%s: Unsupported tx steering type",
3994                        vdev->ndev->name);
3995                vxge_debug_init(VXGE_TRACE,
3996                        "%s: Tx steering disabled", vdev->ndev->name);
3997                vdev->config.tx_steering_type = 0;
3998        }
3999
4000        if (vdev->config.addr_learn_en)
4001                vxge_debug_init(VXGE_TRACE,
4002                        "%s: MAC Address learning enabled", vdev->ndev->name);
4003
4004        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
4005                if (!vxge_bVALn(vpath_mask, i, 1))
4006                        continue;
4007                vxge_debug_ll_config(VXGE_TRACE,
4008                        "%s: MTU size - %d", vdev->ndev->name,
4009                        ((vdev->devh))->
4010                                config.vp_config[i].mtu);
4011                vxge_debug_init(VXGE_TRACE,
4012                        "%s: VLAN tag stripping %s", vdev->ndev->name,
4013                        ((vdev->devh))->
4014                                config.vp_config[i].rpa_strip_vlan_tag
4015                        ? "Enabled" : "Disabled");
4016                vxge_debug_ll_config(VXGE_TRACE,
4017                        "%s: Max frags : %d", vdev->ndev->name,
4018                        ((vdev->devh))->
4019                                config.vp_config[i].fifo.max_frags);
4020                break;
4021        }
4022}
4023
4024#ifdef CONFIG_PM
4025/**
4026 * vxge_pm_suspend - vxge power management suspend entry point
4027 *
4028 */
4029static int vxge_pm_suspend(struct pci_dev *pdev, pm_message_t state)
4030{
4031        return -ENOSYS;
4032}
4033/**
4034 * vxge_pm_resume - vxge power management resume entry point
4035 *
4036 */
4037static int vxge_pm_resume(struct pci_dev *pdev)
4038{
4039        return -ENOSYS;
4040}
4041
4042#endif
4043
4044/**
4045 * vxge_io_error_detected - called when PCI error is detected
4046 * @pdev: Pointer to PCI device
4047 * @state: The current pci connection state
4048 *
4049 * This function is called after a PCI bus error affecting
4050 * this device has been detected.
4051 */
4052static pci_ers_result_t vxge_io_error_detected(struct pci_dev *pdev,
4053                                                pci_channel_state_t state)
4054{
4055        struct __vxge_hw_device *hldev = pci_get_drvdata(pdev);
4056        struct net_device *netdev = hldev->ndev;
4057
4058        netif_device_detach(netdev);
4059
4060        if (state == pci_channel_io_perm_failure)
4061                return PCI_ERS_RESULT_DISCONNECT;
4062
4063        if (netif_running(netdev)) {
4064                /* Bring down the card, while avoiding PCI I/O */
4065                do_vxge_close(netdev, 0);
4066        }
4067
4068        pci_disable_device(pdev);
4069
4070        return PCI_ERS_RESULT_NEED_RESET;
4071}
4072
4073/**
4074 * vxge_io_slot_reset - called after the pci bus has been reset.
4075 * @pdev: Pointer to PCI device
4076 *
4077 * Restart the card from scratch, as if from a cold-boot.
4078 * At this point, the card has exprienced a hard reset,
4079 * followed by fixups by BIOS, and has its config space
4080 * set up identically to what it was at cold boot.
4081 */
4082static pci_ers_result_t vxge_io_slot_reset(struct pci_dev *pdev)
4083{
4084        struct __vxge_hw_device *hldev = pci_get_drvdata(pdev);
4085        struct net_device *netdev = hldev->ndev;
4086
4087        struct vxgedev *vdev = netdev_priv(netdev);
4088
4089        if (pci_enable_device(pdev)) {
4090                netdev_err(netdev, "Cannot re-enable device after reset\n");
4091                return PCI_ERS_RESULT_DISCONNECT;
4092        }
4093
4094        pci_set_master(pdev);
4095        do_vxge_reset(vdev, VXGE_LL_FULL_RESET);
4096
4097        return PCI_ERS_RESULT_RECOVERED;
4098}
4099
4100/**
4101 * vxge_io_resume - called when traffic can start flowing again.
4102 * @pdev: Pointer to PCI device
4103 *
4104 * This callback is called when the error recovery driver tells
4105 * us that its OK to resume normal operation.
4106 */
4107static void vxge_io_resume(struct pci_dev *pdev)
4108{
4109        struct __vxge_hw_device *hldev = pci_get_drvdata(pdev);
4110        struct net_device *netdev = hldev->ndev;
4111
4112        if (netif_running(netdev)) {
4113                if (vxge_open(netdev)) {
4114                        netdev_err(netdev,
4115                                   "Can't bring device back up after reset\n");
4116                        return;
4117                }
4118        }
4119
4120        netif_device_attach(netdev);
4121}
4122
4123static inline u32 vxge_get_num_vfs(u64 function_mode)
4124{
4125        u32 num_functions = 0;
4126
4127        switch (function_mode) {
4128        case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION:
4129        case VXGE_HW_FUNCTION_MODE_SRIOV_8:
4130                num_functions = 8;
4131                break;
4132        case VXGE_HW_FUNCTION_MODE_SINGLE_FUNCTION:
4133                num_functions = 1;
4134                break;
4135        case VXGE_HW_FUNCTION_MODE_SRIOV:
4136        case VXGE_HW_FUNCTION_MODE_MRIOV:
4137        case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION_17:
4138                num_functions = 17;
4139                break;
4140        case VXGE_HW_FUNCTION_MODE_SRIOV_4:
4141                num_functions = 4;
4142                break;
4143        case VXGE_HW_FUNCTION_MODE_MULTI_FUNCTION_2:
4144                num_functions = 2;
4145                break;
4146        case VXGE_HW_FUNCTION_MODE_MRIOV_8:
4147                num_functions = 8; /* TODO */
4148                break;
4149        }
4150        return num_functions;
4151}
4152
4153int vxge_fw_upgrade(struct vxgedev *vdev, char *fw_name, int override)
4154{
4155        struct __vxge_hw_device *hldev = vdev->devh;
4156        u32 maj, min, bld, cmaj, cmin, cbld;
4157        enum vxge_hw_status status;
4158        const struct firmware *fw;
4159        int ret;
4160
4161        ret = request_firmware(&fw, fw_name, &vdev->pdev->dev);
4162        if (ret) {
4163                vxge_debug_init(VXGE_ERR, "%s: Firmware file '%s' not found",
4164                                VXGE_DRIVER_NAME, fw_name);
4165                goto out;
4166        }
4167
4168        /* Load the new firmware onto the adapter */
4169        status = vxge_update_fw_image(hldev, fw->data, fw->size);
4170        if (status != VXGE_HW_OK) {
4171                vxge_debug_init(VXGE_ERR,
4172                                "%s: FW image download to adapter failed '%s'.",
4173                                VXGE_DRIVER_NAME, fw_name);
4174                ret = -EIO;
4175                goto out;
4176        }
4177
4178        /* Read the version of the new firmware */
4179        status = vxge_hw_upgrade_read_version(hldev, &maj, &min, &bld);
4180        if (status != VXGE_HW_OK) {
4181                vxge_debug_init(VXGE_ERR,
4182                                "%s: Upgrade read version failed '%s'.",
4183                                VXGE_DRIVER_NAME, fw_name);
4184                ret = -EIO;
4185                goto out;
4186        }
4187
4188        cmaj = vdev->config.device_hw_info.fw_version.major;
4189        cmin = vdev->config.device_hw_info.fw_version.minor;
4190        cbld = vdev->config.device_hw_info.fw_version.build;
4191        /* It's possible the version in /lib/firmware is not the latest version.
4192         * If so, we could get into a loop of trying to upgrade to the latest
4193         * and flashing the older version.
4194         */
4195        if (VXGE_FW_VER(maj, min, bld) == VXGE_FW_VER(cmaj, cmin, cbld) &&
4196            !override) {
4197                ret = -EINVAL;
4198                goto out;
4199        }
4200
4201        printk(KERN_NOTICE "Upgrade to firmware version %d.%d.%d commencing\n",
4202               maj, min, bld);
4203
4204        /* Flash the adapter with the new firmware */
4205        status = vxge_hw_flash_fw(hldev);
4206        if (status != VXGE_HW_OK) {
4207                vxge_debug_init(VXGE_ERR, "%s: Upgrade commit failed '%s'.",
4208                                VXGE_DRIVER_NAME, fw_name);
4209                ret = -EIO;
4210                goto out;
4211        }
4212
4213        printk(KERN_NOTICE "Upgrade of firmware successful!  Adapter must be "
4214               "hard reset before using, thus requiring a system reboot or a "
4215               "hotplug event.\n");
4216
4217out:
4218        release_firmware(fw);
4219        return ret;
4220}
4221
4222static int vxge_probe_fw_update(struct vxgedev *vdev)
4223{
4224        u32 maj, min, bld;
4225        int ret, gpxe = 0;
4226        char *fw_name;
4227
4228        maj = vdev->config.device_hw_info.fw_version.major;
4229        min = vdev->config.device_hw_info.fw_version.minor;
4230        bld = vdev->config.device_hw_info.fw_version.build;
4231
4232        if (VXGE_FW_VER(maj, min, bld) == VXGE_CERT_FW_VER)
4233                return 0;
4234
4235        /* Ignore the build number when determining if the current firmware is
4236         * "too new" to load the driver
4237         */
4238        if (VXGE_FW_VER(maj, min, 0) > VXGE_CERT_FW_VER) {
4239                vxge_debug_init(VXGE_ERR, "%s: Firmware newer than last known "
4240                                "version, unable to load driver\n",
4241                                VXGE_DRIVER_NAME);
4242                return -EINVAL;
4243        }
4244
4245        /* Firmware 1.4.4 and older cannot be upgraded, and is too ancient to
4246         * work with this driver.
4247         */
4248        if (VXGE_FW_VER(maj, min, bld) <= VXGE_FW_DEAD_VER) {
4249                vxge_debug_init(VXGE_ERR, "%s: Firmware %d.%d.%d cannot be "
4250                                "upgraded\n", VXGE_DRIVER_NAME, maj, min, bld);
4251                return -EINVAL;
4252        }
4253
4254        /* If file not specified, determine gPXE or not */
4255        if (VXGE_FW_VER(maj, min, bld) >= VXGE_EPROM_FW_VER) {
4256                int i;
4257                for (i = 0; i < VXGE_HW_MAX_ROM_IMAGES; i++)
4258                        if (vdev->devh->eprom_versions[i]) {
4259                                gpxe = 1;
4260                                break;
4261                        }
4262        }
4263        if (gpxe)
4264                fw_name = "vxge/X3fw-pxe.ncf";
4265        else
4266                fw_name = "vxge/X3fw.ncf";
4267
4268        ret = vxge_fw_upgrade(vdev, fw_name, 0);
4269        /* -EINVAL and -ENOENT are not fatal errors for flashing firmware on
4270         * probe, so ignore them
4271         */
4272        if (ret != -EINVAL && ret != -ENOENT)
4273                return -EIO;
4274        else
4275                ret = 0;
4276
4277        if (VXGE_FW_VER(VXGE_CERT_FW_VER_MAJOR, VXGE_CERT_FW_VER_MINOR, 0) >
4278            VXGE_FW_VER(maj, min, 0)) {
4279                vxge_debug_init(VXGE_ERR, "%s: Firmware %d.%d.%d is too old to"
4280                                " be used with this driver.",
4281                                VXGE_DRIVER_NAME, maj, min, bld);
4282                return -EINVAL;
4283        }
4284
4285        return ret;
4286}
4287
4288static int is_sriov_initialized(struct pci_dev *pdev)
4289{
4290        int pos;
4291        u16 ctrl;
4292
4293        pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
4294        if (pos) {
4295                pci_read_config_word(pdev, pos + PCI_SRIOV_CTRL, &ctrl);
4296                if (ctrl & PCI_SRIOV_CTRL_VFE)
4297                        return 1;
4298        }
4299        return 0;
4300}
4301
4302static const struct vxge_hw_uld_cbs vxge_callbacks = {
4303        .link_up = vxge_callback_link_up,
4304        .link_down = vxge_callback_link_down,
4305        .crit_err = vxge_callback_crit_err,
4306};
4307
4308/**
4309 * vxge_probe
4310 * @pdev : structure containing the PCI related information of the device.
4311 * @pre: List of PCI devices supported by the driver listed in vxge_id_table.
4312 * Description:
4313 * This function is called when a new PCI device gets detected and initializes
4314 * it.
4315 * Return value:
4316 * returns 0 on success and negative on failure.
4317 *
4318 */
4319static int
4320vxge_probe(struct pci_dev *pdev, const struct pci_device_id *pre)
4321{
4322        struct __vxge_hw_device *hldev;
4323        enum vxge_hw_status status;
4324        int ret;
4325        int high_dma = 0;
4326        u64 vpath_mask = 0;
4327        struct vxgedev *vdev;
4328        struct vxge_config *ll_config = NULL;
4329        struct vxge_hw_device_config *device_config = NULL;
4330        struct vxge_hw_device_attr attr;
4331        int i, j, no_of_vpath = 0, max_vpath_supported = 0;
4332        u8 *macaddr;
4333        struct vxge_mac_addrs *entry;
4334        static int bus = -1, device = -1;
4335        u32 host_type;
4336        u8 new_device = 0;
4337        enum vxge_hw_status is_privileged;
4338        u32 function_mode;
4339        u32 num_vfs = 0;
4340
4341        vxge_debug_entryexit(VXGE_TRACE, "%s:%d", __func__, __LINE__);
4342        attr.pdev = pdev;
4343
4344        /* In SRIOV-17 mode, functions of the same adapter
4345         * can be deployed on different buses
4346         */
4347        if (((bus != pdev->bus->number) || (device != PCI_SLOT(pdev->devfn))) &&
4348            !pdev->is_virtfn)
4349                new_device = 1;
4350
4351        bus = pdev->bus->number;
4352        device = PCI_SLOT(pdev->devfn);
4353
4354        if (new_device) {
4355                if (driver_config->config_dev_cnt &&
4356                   (driver_config->config_dev_cnt !=
4357                        driver_config->total_dev_cnt))
4358                        vxge_debug_init(VXGE_ERR,
4359                                "%s: Configured %d of %d devices",
4360                                VXGE_DRIVER_NAME,
4361                                driver_config->config_dev_cnt,
4362                                driver_config->total_dev_cnt);
4363                driver_config->config_dev_cnt = 0;
4364                driver_config->total_dev_cnt = 0;
4365        }
4366
4367        /* Now making the CPU based no of vpath calculation
4368         * applicable for individual functions as well.
4369         */
4370        driver_config->g_no_cpus = 0;
4371        driver_config->vpath_per_dev = max_config_vpath;
4372
4373        driver_config->total_dev_cnt++;
4374        if (++driver_config->config_dev_cnt > max_config_dev) {
4375                ret = 0;
4376                goto _exit0;
4377        }
4378
4379        device_config = kzalloc(sizeof(struct vxge_hw_device_config),
4380                GFP_KERNEL);
4381        if (!device_config) {
4382                ret = -ENOMEM;
4383                vxge_debug_init(VXGE_ERR,
4384                        "device_config : malloc failed %s %d",
4385                        __FILE__, __LINE__);
4386                goto _exit0;
4387        }
4388
4389        ll_config = kzalloc(sizeof(struct vxge_config), GFP_KERNEL);
4390        if (!ll_config) {
4391                ret = -ENOMEM;
4392                vxge_debug_init(VXGE_ERR,
4393                        "device_config : malloc failed %s %d",
4394                        __FILE__, __LINE__);
4395                goto _exit0;
4396        }
4397        ll_config->tx_steering_type = TX_MULTIQ_STEERING;
4398        ll_config->intr_type = MSI_X;
4399        ll_config->napi_weight = NEW_NAPI_WEIGHT;
4400        ll_config->rth_steering = RTH_STEERING;
4401
4402        /* get the default configuration parameters */
4403        vxge_hw_device_config_default_get(device_config);
4404
4405        /* initialize configuration parameters */
4406        vxge_device_config_init(device_config, &ll_config->intr_type);
4407
4408        ret = pci_enable_device(pdev);
4409        if (ret) {
4410                vxge_debug_init(VXGE_ERR,
4411                        "%s : can not enable PCI device", __func__);
4412                goto _exit0;
4413        }
4414
4415        if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
4416                vxge_debug_ll_config(VXGE_TRACE,
4417                        "%s : using 64bit DMA", __func__);
4418
4419                high_dma = 1;
4420
4421                if (pci_set_consistent_dma_mask(pdev,
4422                                                DMA_BIT_MASK(64))) {
4423                        vxge_debug_init(VXGE_ERR,
4424                                "%s : unable to obtain 64bit DMA for "
4425                                "consistent allocations", __func__);
4426                        ret = -ENOMEM;
4427                        goto _exit1;
4428                }
4429        } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
4430                vxge_debug_ll_config(VXGE_TRACE,
4431                        "%s : using 32bit DMA", __func__);
4432        } else {
4433                ret = -ENOMEM;
4434                goto _exit1;
4435        }
4436
4437        ret = pci_request_region(pdev, 0, VXGE_DRIVER_NAME);
4438        if (ret) {
4439                vxge_debug_init(VXGE_ERR,
4440                        "%s : request regions failed", __func__);
4441                goto _exit1;
4442        }
4443
4444        pci_set_master(pdev);
4445
4446        attr.bar0 = pci_ioremap_bar(pdev, 0);
4447        if (!attr.bar0) {
4448                vxge_debug_init(VXGE_ERR,
4449                        "%s : cannot remap io memory bar0", __func__);
4450                ret = -ENODEV;
4451                goto _exit2;
4452        }
4453        vxge_debug_ll_config(VXGE_TRACE,
4454                "pci ioremap bar0: %p:0x%llx",
4455                attr.bar0,
4456                (unsigned long long)pci_resource_start(pdev, 0));
4457
4458        status = vxge_hw_device_hw_info_get(attr.bar0,
4459                        &ll_config->device_hw_info);
4460        if (status != VXGE_HW_OK) {
4461                vxge_debug_init(VXGE_ERR,
4462                        "%s: Reading of hardware info failed."
4463                        "Please try upgrading the firmware.", VXGE_DRIVER_NAME);
4464                ret = -EINVAL;
4465                goto _exit3;
4466        }
4467
4468        vpath_mask = ll_config->device_hw_info.vpath_mask;
4469        if (vpath_mask == 0) {
4470                vxge_debug_ll_config(VXGE_TRACE,
4471                        "%s: No vpaths available in device", VXGE_DRIVER_NAME);
4472                ret = -EINVAL;
4473                goto _exit3;
4474        }
4475
4476        vxge_debug_ll_config(VXGE_TRACE,
4477                "%s:%d  Vpath mask = %llx", __func__, __LINE__,
4478                (unsigned long long)vpath_mask);
4479
4480        function_mode = ll_config->device_hw_info.function_mode;
4481        host_type = ll_config->device_hw_info.host_type;
4482        is_privileged = __vxge_hw_device_is_privilaged(host_type,
4483                ll_config->device_hw_info.func_id);
4484
4485        /* Check how many vpaths are available */
4486        for (i = 0; i < VXGE_HW_MAX_VIRTUAL_PATHS; i++) {
4487                if (!((vpath_mask) & vxge_mBIT(i)))
4488                        continue;
4489                max_vpath_supported++;
4490        }
4491
4492        if (new_device)
4493                num_vfs = vxge_get_num_vfs(function_mode) - 1;
4494
4495        /* Enable SRIOV mode, if firmware has SRIOV support and if it is a PF */