drivers/net/bnx2x/bnx2x_cmn.c

   1 /* bnx2x_cmn.c: Broadcom Everest network driver.
   2  *
   3  * Copyright (c) 2007-2011 Broadcom Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation.
   8  *
   9  * Maintained by: Eilon Greenstein <eilong@broadcom.com>
  10  * Written by: Eliezer Tamir
  11  * Based on code from Michael Chan's bnx2 driver
  12  * UDP CSUM errata workaround by Arik Gendelman
  13  * Slowpath and fastpath rework by Vladislav Zolotarov
  14  * Statistics and Link management by Yitchak Gertner
  15  *
  16  */
  17
  18 #include <linux/etherdevice.h>
  19 #include <linux/if_vlan.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/ip.h>
  22 #include <net/ipv6.h>
  23 #include <net/ip6_checksum.h>
  24 #include <linux/firmware.h>
  25 #include <linux/prefetch.h>
  26 #include "bnx2x_cmn.h"
  27 #include "bnx2x_init.h"
  28 #include "bnx2x_sp.h"
  29
  30
  31
  32 /**
  33  * bnx2x_bz_fp - zero content of the fastpath structure.
  34  *
  35  * @bp:         driver handle
  36  * @index:      fastpath index to be zeroed
  37  *
  38  * Makes sure the contents of the bp->fp[index].napi is kept
  39  * intact.
  40  */
  41 static inline void bnx2x_bz_fp(struct bnx2x *bp, int index)
  42 {
  43         struct bnx2x_fastpath *fp = &bp->fp[index];
  44         struct napi_struct orig_napi = fp->napi;
  45         /* bzero bnx2x_fastpath contents */
  46         memset(fp, 0, sizeof(*fp));
  47
  48         /* Restore the NAPI object as it has been already initialized */
  49         fp->napi = orig_napi;
  50
  51         fp->bp = bp;
  52         fp->index = index;
  53         if (IS_ETH_FP(fp))
  54                 fp->max_cos = bp->max_cos;
  55         else
  56                 /* Special queues support only one CoS */
  57                 fp->max_cos = 1;
  58
  59         /*
  60          * set the tpa flag for each queue. The tpa flag determines the queue
  61          * minimal size so it must be set prior to queue memory allocation
  62          */
  63         fp->disable_tpa = ((bp->flags & TPA_ENABLE_FLAG) == 0);
  64
  65 #ifdef BCM_CNIC
  66         /* We don't want TPA on FCoE, FWD and OOO L2 rings */
  67         bnx2x_fcoe(bp, disable_tpa) = 1;
  68 #endif
  69 }
  70
  71 /**
  72  * bnx2x_move_fp - move content of the fastpath structure.
  73  *
  74  * @bp:         driver handle
  75  * @from:       source FP index
  76  * @to:         destination FP index
  77  *
  78  * Makes sure the contents of the bp->fp[to].napi is kept
  79  * intact.
  80  */
  81 static inline void bnx2x_move_fp(struct bnx2x *bp, int from, int to)
  82 {
  83         struct bnx2x_fastpath *from_fp = &bp->fp[from];
  84         struct bnx2x_fastpath *to_fp = &bp->fp[to];
  85         struct napi_struct orig_napi = to_fp->napi;
  86         /* Move bnx2x_fastpath contents */
  87         memcpy(to_fp, from_fp, sizeof(*to_fp));
  88         to_fp->index = to;
  89
  90         /* Restore the NAPI object as it has been already initialized */
  91         to_fp->napi = orig_napi;
  92 }
  93
  94 int load_count[2][3] = { {0} }; /* per-path: 0-common, 1-port0, 2-port1 */
  95
  96 /* free skb in the packet ring at pos idx
  97  * return idx of last bd freed
  98  */
  99 static u16 bnx2x_free_tx_pkt(struct bnx2x *bp, struct bnx2x_fp_txdata *txdata,
 100                              u16 idx)
 101 {
 102         struct sw_tx_bd *tx_buf = &txdata->tx_buf_ring[idx];
 103         struct eth_tx_start_bd *tx_start_bd;
 104         struct eth_tx_bd *tx_data_bd;
 105         struct sk_buff *skb = tx_buf->skb;
 106         u16 bd_idx = TX_BD(tx_buf->first_bd), new_cons;
 107         int nbd;
 108
 109         /* prefetch skb end pointer to speedup dev_kfree_skb() */
 110         prefetch(&skb->end);
 111
 112         DP(BNX2X_MSG_FP, "fp[%d]: pkt_idx %d  buff @(%p)->skb %p\n",
 113            txdata->txq_index, idx, tx_buf, skb);
 114
 115         /* unmap first bd */
 116         DP(BNX2X_MSG_OFF, "free bd_idx %d\n", bd_idx);
 117         tx_start_bd = &txdata->tx_desc_ring[bd_idx].start_bd;
 118         dma_unmap_single(&bp->pdev->dev, BD_UNMAP_ADDR(tx_start_bd),
 119                          BD_UNMAP_LEN(tx_start_bd), DMA_TO_DEVICE);
 120
 121
 122         nbd = le16_to_cpu(tx_start_bd->nbd) - 1;
 123 #ifdef BNX2X_STOP_ON_ERROR
 124         if ((nbd - 1) > (MAX_SKB_FRAGS + 2)) {
 125                 BNX2X_ERR("BAD nbd!\n");
 126                 bnx2x_panic();
 127         }
 128 #endif
 129         new_cons = nbd + tx_buf->first_bd;
 130
 131         /* Get the next bd */
 132         bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
 133
 134         /* Skip a parse bd... */
 135         --nbd;
 136         bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
 137
 138         /* ...and the TSO split header bd since they have no mapping */
 139         if (tx_buf->flags & BNX2X_TSO_SPLIT_BD) {
 140                 --nbd;
 141                 bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
 142         }
 143
 144         /* now free frags */
 145         while (nbd > 0) {
 146
 147                 DP(BNX2X_MSG_OFF, "free frag bd_idx %d\n", bd_idx);
 148                 tx_data_bd = &txdata->tx_desc_ring[bd_idx].reg_bd;
 149                 dma_unmap_page(&bp->pdev->dev, BD_UNMAP_ADDR(tx_data_bd),
 150                                BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE);
 151                 if (--nbd)
 152                         bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
 153         }
 154
 155         /* release skb */
 156         WARN_ON(!skb);
 157         dev_kfree_skb_any(skb);
 158         tx_buf->first_bd = 0;
 159         tx_buf->skb = NULL;
 160
 161         return new_cons;
 162 }
 163
 164 int bnx2x_tx_int(struct bnx2x *bp, struct bnx2x_fp_txdata *txdata)
 165 {
 166         struct netdev_queue *txq;
 167         u16 hw_cons, sw_cons, bd_cons = txdata->tx_bd_cons;
 168
 169 #ifdef BNX2X_STOP_ON_ERROR
 170         if (unlikely(bp->panic))
 171                 return -1;
 172 #endif
 173
 174         txq = netdev_get_tx_queue(bp->dev, txdata->txq_index);
 175         hw_cons = le16_to_cpu(*txdata->tx_cons_sb);
 176         sw_cons = txdata->tx_pkt_cons;
 177
 178         while (sw_cons != hw_cons) {
 179                 u16 pkt_cons;
 180
 181                 pkt_cons = TX_BD(sw_cons);
 182
 183                 DP(NETIF_MSG_TX_DONE, "queue[%d]: hw_cons %u  sw_cons %u "
 184                                       " pkt_cons %u\n",
 185                    txdata->txq_index, hw_cons, sw_cons, pkt_cons);
 186
 187                 bd_cons = bnx2x_free_tx_pkt(bp, txdata, pkt_cons);
 188                 sw_cons++;
 189         }
 190
 191         txdata->tx_pkt_cons = sw_cons;
 192         txdata->tx_bd_cons = bd_cons;
 193
 194         /* Need to make the tx_bd_cons update visible to start_xmit()
 195          * before checking for netif_tx_queue_stopped().  Without the
 196          * memory barrier, there is a small possibility that
 197          * start_xmit() will miss it and cause the queue to be stopped
 198          * forever.
 199          * On the other hand we need an rmb() here to ensure the proper
 200          * ordering of bit testing in the following
 201          * netif_tx_queue_stopped(txq) call.
 202          */
 203         smp_mb();
 204
 205         if (unlikely(netif_tx_queue_stopped(txq))) {
 206                 /* Taking tx_lock() is needed to prevent reenabling the queue
 207                  * while it's empty. This could have happen if rx_action() gets
 208                  * suspended in bnx2x_tx_int() after the condition before
 209                  * netif_tx_wake_queue(), while tx_action (bnx2x_start_xmit()):
 210                  *
 211                  * stops the queue->sees fresh tx_bd_cons->releases the queue->
 212                  * sends some packets consuming the whole queue again->
 213                  * stops the queue
 214                  */
 215
 216                 __netif_tx_lock(txq, smp_processor_id());
 217
 218                 if ((netif_tx_queue_stopped(txq)) &&
 219                     (bp->state == BNX2X_STATE_OPEN) &&
 220                     (bnx2x_tx_avail(bp, txdata) >= MAX_SKB_FRAGS + 3))
 221                         netif_tx_wake_queue(txq);
 222
 223                 __netif_tx_unlock(txq);
 224         }
 225         return 0;
 226 }
 227
 228 static inline void bnx2x_update_last_max_sge(struct bnx2x_fastpath *fp,
 229                                              u16 idx)
 230 {
 231         u16 last_max = fp->last_max_sge;
 232
 233         if (SUB_S16(idx, last_max) > 0)
 234                 fp->last_max_sge = idx;
 235 }
 236
 237 static void bnx2x_update_sge_prod(struct bnx2x_fastpath *fp,
 238                                   struct eth_fast_path_rx_cqe *fp_cqe)
 239 {
 240         struct bnx2x *bp = fp->bp;
 241         u16 sge_len = SGE_PAGE_ALIGN(le16_to_cpu(fp_cqe->pkt_len) -
 242                                      le16_to_cpu(fp_cqe->len_on_bd)) >>
 243                       SGE_PAGE_SHIFT;
 244         u16 last_max, last_elem, first_elem;
 245         u16 delta = 0;
 246         u16 i;
 247
 248         if (!sge_len)
 249                 return;
 250
 251         /* First mark all used pages */
 252         for (i = 0; i < sge_len; i++)
 253                 BIT_VEC64_CLEAR_BIT(fp->sge_mask,
 254                         RX_SGE(le16_to_cpu(fp_cqe->sgl_or_raw_data.sgl[i])));
 255
 256         DP(NETIF_MSG_RX_STATUS, "fp_cqe->sgl[%d] = %d\n",
 257            sge_len - 1, le16_to_cpu(fp_cqe->sgl_or_raw_data.sgl[sge_len - 1]));
 258
 259         /* Here we assume that the last SGE index is the biggest */
 260         prefetch((void *)(fp->sge_mask));
 261         bnx2x_update_last_max_sge(fp,
 262                 le16_to_cpu(fp_cqe->sgl_or_raw_data.sgl[sge_len - 1]));
 263
 264         last_max = RX_SGE(fp->last_max_sge);
 265         last_elem = last_max >> BIT_VEC64_ELEM_SHIFT;
 266         first_elem = RX_SGE(fp->rx_sge_prod) >> BIT_VEC64_ELEM_SHIFT;
 267
 268         /* If ring is not full */
 269         if (last_elem + 1 != first_elem)
 270                 last_elem++;
 271
 272         /* Now update the prod */
 273         for (i = first_elem; i != last_elem; i = NEXT_SGE_MASK_ELEM(i)) {
 274                 if (likely(fp->sge_mask[i]))
 275                         break;
 276
 277                 fp->sge_mask[i] = BIT_VEC64_ELEM_ONE_MASK;
 278                 delta += BIT_VEC64_ELEM_SZ;
 279         }
 280
 281         if (delta > 0) {
 282                 fp->rx_sge_prod += delta;
 283                 /* clear page-end entries */
 284                 bnx2x_clear_sge_mask_next_elems(fp);
 285         }
 286
 287         DP(NETIF_MSG_RX_STATUS,
 288            "fp->last_max_sge = %d  fp->rx_sge_prod = %d\n",
 289            fp->last_max_sge, fp->rx_sge_prod);
 290 }
 291
 292 static void bnx2x_tpa_start(struct bnx2x_fastpath *fp, u16 queue,
 293                             struct sk_buff *skb, u16 cons, u16 prod,
 294                             struct eth_fast_path_rx_cqe *cqe)
 295 {
 296         struct bnx2x *bp = fp->bp;
 297         struct sw_rx_bd *cons_rx_buf = &fp->rx_buf_ring[cons];
 298         struct sw_rx_bd *prod_rx_buf = &fp->rx_buf_ring[prod];
 299         struct eth_rx_bd *prod_bd = &fp->rx_desc_ring[prod];
 300         dma_addr_t mapping;
 301         struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
 302         struct sw_rx_bd *first_buf = &tpa_info->first_buf;
 303
 304         /* print error if current state != stop */
 305         if (tpa_info->tpa_state != BNX2X_TPA_STOP)
 306                 BNX2X_ERR("start of bin not in stop [%d]\n", queue);
 307
 308         /* Try to map an empty skb from the aggregation info  */
 309         mapping = dma_map_single(&bp->pdev->dev,
 310                                  first_buf->skb->data,
 311                                  fp->rx_buf_size, DMA_FROM_DEVICE);
 312         /*
 313          *  ...if it fails - move the skb from the consumer to the producer
 314          *  and set the current aggregation state as ERROR to drop it
 315          *  when TPA_STOP arrives.
 316          */
 317
 318         if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
 319                 /* Move the BD from the consumer to the producer */
 320                 bnx2x_reuse_rx_skb(fp, cons, prod);
 321                 tpa_info->tpa_state = BNX2X_TPA_ERROR;
 322                 return;
 323         }
 324
 325         /* move empty skb from pool to prod */
 326         prod_rx_buf->skb = first_buf->skb;
 327         dma_unmap_addr_set(prod_rx_buf, mapping, mapping);
 328         /* point prod_bd to new skb */
 329         prod_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
 330         prod_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
 331
 332         /* move partial skb from cons to pool (don't unmap yet) */
 333         *first_buf = *cons_rx_buf;
 334
 335         /* mark bin state as START */
 336         tpa_info->parsing_flags =
 337                 le16_to_cpu(cqe->pars_flags.flags);
 338         tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag);
 339         tpa_info->tpa_state = BNX2X_TPA_START;
 340         tpa_info->len_on_bd = le16_to_cpu(cqe->len_on_bd);
 341         tpa_info->placement_offset = cqe->placement_offset;
 342
 343 #ifdef BNX2X_STOP_ON_ERROR
 344         fp->tpa_queue_used |= (1 << queue);
 345 #ifdef _ASM_GENERIC_INT_L64_H
 346         DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%lx\n",
 347 #else
 348         DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%llx\n",
 349 #endif
 350            fp->tpa_queue_used);
 351 #endif
 352 }
 353
 354 /* Timestamp option length allowed for TPA aggregation:
 355  *
 356  *              nop nop kind length echo val
 357  */
 358 #define TPA_TSTAMP_OPT_LEN      12
 359 /**
 360  * bnx2x_set_lro_mss - calculate the approximate value of the MSS
 361  *
 362  * @bp:                 driver handle
 363  * @parsing_flags:      parsing flags from the START CQE
 364  * @len_on_bd:          total length of the first packet for the
 365  *                      aggregation.
 366  *
 367  * Approximate value of the MSS for this aggregation calculated using
 368  * the first packet of it.
 369  */
 370 static inline u16 bnx2x_set_lro_mss(struct bnx2x *bp, u16 parsing_flags,
 371                                     u16 len_on_bd)
 372 {
 373         /*
 374          * TPA arrgregation won't have either IP options or TCP options
 375          * other than timestamp or IPv6 extension headers.
 376          */
 377         u16 hdrs_len = ETH_HLEN + sizeof(struct tcphdr);
 378
 379         if (GET_FLAG(parsing_flags, PARSING_FLAGS_OVER_ETHERNET_PROTOCOL) ==
 380             PRS_FLAG_OVERETH_IPV6)
 381                 hdrs_len += sizeof(struct ipv6hdr);
 382         else /* IPv4 */
 383                 hdrs_len += sizeof(struct iphdr);
 384
 385
 386         /* Check if there was a TCP timestamp, if there is it's will
 387          * always be 12 bytes length: nop nop kind length echo val.
 388          *
 389          * Otherwise FW would close the aggregation.
 390          */
 391         if (parsing_flags & PARSING_FLAGS_TIME_STAMP_EXIST_FLAG)
 392                 hdrs_len += TPA_TSTAMP_OPT_LEN;
 393
 394         return len_on_bd - hdrs_len;
 395 }
 396
 397 static int bnx2x_fill_frag_skb(struct bnx2x *bp, struct bnx2x_fastpath *fp,
 398                                u16 queue, struct sk_buff *skb,
 399                                struct eth_end_agg_rx_cqe *cqe,
 400                                u16 cqe_idx)
 401 {
 402         struct sw_rx_page *rx_pg, old_rx_pg;
 403         u32 i, frag_len, frag_size, pages;
 404         int err;
 405         int j;
 406         struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
 407         u16 len_on_bd = tpa_info->len_on_bd;
 408
 409         frag_size = le16_to_cpu(cqe->pkt_len) - len_on_bd;
 410         pages = SGE_PAGE_ALIGN(frag_size) >> SGE_PAGE_SHIFT;
 411
 412         /* This is needed in order to enable forwarding support */
 413         if (frag_size)
 414                 skb_shinfo(skb)->gso_size = bnx2x_set_lro_mss(bp,
 415                                         tpa_info->parsing_flags, len_on_bd);
 416
 417 #ifdef BNX2X_STOP_ON_ERROR
 418         if (pages > min_t(u32, 8, MAX_SKB_FRAGS)*SGE_PAGE_SIZE*PAGES_PER_SGE) {
 419                 BNX2X_ERR("SGL length is too long: %d. CQE index is %d\n",
 420                           pages, cqe_idx);
 421                 BNX2X_ERR("cqe->pkt_len = %d\n", cqe->pkt_len);
 422                 bnx2x_panic();
 423                 return -EINVAL;
 424         }
 425 #endif
 426
 427         /* Run through the SGL and compose the fragmented skb */
 428         for (i = 0, j = 0; i < pages; i += PAGES_PER_SGE, j++) {
 429                 u16 sge_idx = RX_SGE(le16_to_cpu(cqe->sgl_or_raw_data.sgl[j]));
 430
 431                 /* FW gives the indices of the SGE as if the ring is an array
 432                    (meaning that "next" element will consume 2 indices) */
 433                 frag_len = min(frag_size, (u32)(SGE_PAGE_SIZE*PAGES_PER_SGE));
 434                 rx_pg = &fp->rx_page_ring[sge_idx];
 435                 old_rx_pg = *rx_pg;
 436
 437                 /* If we fail to allocate a substitute page, we simply stop
 438                    where we are and drop the whole packet */
 439                 err = bnx2x_alloc_rx_sge(bp, fp, sge_idx);
 440                 if (unlikely(err)) {
 441                         fp->eth_q_stats.rx_skb_alloc_failed++;
 442                         return err;
 443                 }
 444
 445                 /* Unmap the page as we r going to pass it to the stack */
 446                 dma_unmap_page(&bp->pdev->dev,
 447                                dma_unmap_addr(&old_rx_pg, mapping),
 448                                SGE_PAGE_SIZE*PAGES_PER_SGE, DMA_FROM_DEVICE);
 449
 450                 /* Add one frag and update the appropriate fields in the skb */
 451                 skb_fill_page_desc(skb, j, old_rx_pg.page, 0, frag_len);
 452
 453                 skb->data_len += frag_len;
 454                 skb->truesize += frag_len;
 455                 skb->len += frag_len;
 456
 457                 frag_size -= frag_len;
 458         }
 459
 460         return 0;
 461 }
 462
 463 static void bnx2x_tpa_stop(struct bnx2x *bp, struct bnx2x_fastpath *fp,
 464                            u16 queue, struct eth_end_agg_rx_cqe *cqe,
 465                            u16 cqe_idx)
 466 {
 467         struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
 468         struct sw_rx_bd *rx_buf = &tpa_info->first_buf;
 469         u8 pad = tpa_info->placement_offset;
 470         u16 len = tpa_info->len_on_bd;
 471         struct sk_buff *skb = rx_buf->skb;
 472         /* alloc new skb */
 473         struct sk_buff *new_skb;
 474         u8 old_tpa_state = tpa_info->tpa_state;
 475
 476         tpa_info->tpa_state = BNX2X_TPA_STOP;
 477
 478         /* If we there was an error during the handling of the TPA_START -
 479          * drop this aggregation.
 480          */
 481         if (old_tpa_state == BNX2X_TPA_ERROR)
 482                 goto drop;
 483
 484         /* Try to allocate the new skb */
 485         new_skb = netdev_alloc_skb(bp->dev, fp->rx_buf_size);
 486
 487         /* Unmap skb in the pool anyway, as we are going to change
 488            pool entry status to BNX2X_TPA_STOP even if new skb allocation
 489            fails. */
 490         dma_unmap_single(&bp->pdev->dev, dma_unmap_addr(rx_buf, mapping),
 491                          fp->rx_buf_size, DMA_FROM_DEVICE);
 492
 493         if (likely(new_skb)) {
 494                 prefetch(skb);
 495                 prefetch(((char *)(skb)) + L1_CACHE_BYTES);
 496
 497 #ifdef BNX2X_STOP_ON_ERROR
 498                 if (pad + len > fp->rx_buf_size) {
 499                         BNX2X_ERR("skb_put is about to fail...  "
 500                                   "pad %d  len %d  rx_buf_size %d\n",
 501                                   pad, len, fp->rx_buf_size);
 502                         bnx2x_panic();
 503                         return;
 504                 }
 505 #endif
 506
 507                 skb_reserve(skb, pad);
 508                 skb_put(skb, len);
 509
 510                 skb->protocol = eth_type_trans(skb, bp->dev);
 511                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 512
 513                 if (!bnx2x_fill_frag_skb(bp, fp, queue, skb, cqe, cqe_idx)) {
 514                         if (tpa_info->parsing_flags & PARSING_FLAGS_VLAN)
 515                                 __vlan_hwaccel_put_tag(skb, tpa_info->vlan_tag);
 516                         napi_gro_receive(&fp->napi, skb);
 517                 } else {
 518                         DP(NETIF_MSG_RX_STATUS, "Failed to allocate new pages"
 519                            " - dropping packet!\n");
 520                         dev_kfree_skb_any(skb);
 521                 }
 522
 523
 524                 /* put new skb in bin */
 525                 rx_buf->skb = new_skb;
 526
 527                 return;
 528         }
 529
 530 drop:
 531         /* drop the packet and keep the buffer in the bin */
 532         DP(NETIF_MSG_RX_STATUS,
 533            "Failed to allocate or map a new skb - dropping packet!\n");
 534         fp->eth_q_stats.rx_skb_alloc_failed++;
 535 }
 536
 537 /* Set Toeplitz hash value in the skb using the value from the
 538  * CQE (calculated by HW).
 539  */
 540 static inline void bnx2x_set_skb_rxhash(struct bnx2x *bp, union eth_rx_cqe *cqe,
 541                                         struct sk_buff *skb)
 542 {
 543         /* Set Toeplitz hash from CQE */
 544         if ((bp->dev->features & NETIF_F_RXHASH) &&
 545             (cqe->fast_path_cqe.status_flags &
 546              ETH_FAST_PATH_RX_CQE_RSS_HASH_FLG))
 547                 skb->rxhash =
 548                 le32_to_cpu(cqe->fast_path_cqe.rss_hash_result);
 549 }
 550
 551 int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
 552 {
 553         struct bnx2x *bp = fp->bp;
 554         u16 bd_cons, bd_prod, bd_prod_fw, comp_ring_cons;
 555         u16 hw_comp_cons, sw_comp_cons, sw_comp_prod;
 556         int rx_pkt = 0;
 557
 558 #ifdef BNX2X_STOP_ON_ERROR
 559         if (unlikely(bp->panic))
 560                 return 0;
 561 #endif
 562
 563         /* CQ "next element" is of the size of the regular element,
 564            that's why it's ok here */
 565         hw_comp_cons = le16_to_cpu(*fp->rx_cons_sb);
 566         if ((hw_comp_cons & MAX_RCQ_DESC_CNT) == MAX_RCQ_DESC_CNT)
 567                 hw_comp_cons++;
 568
 569         bd_cons = fp->rx_bd_cons;
 570         bd_prod = fp->rx_bd_prod;
 571         bd_prod_fw = bd_prod;
 572         sw_comp_cons = fp->rx_comp_cons;
 573         sw_comp_prod = fp->rx_comp_prod;
 574
 575         /* Memory barrier necessary as speculative reads of the rx
 576          * buffer can be ahead of the index in the status block
 577          */
 578         rmb();
 579
 580         DP(NETIF_MSG_RX_STATUS,
 581            "queue[%d]:  hw_comp_cons %u  sw_comp_cons %u\n",
 582            fp->index, hw_comp_cons, sw_comp_cons);
 583
 584         while (sw_comp_cons != hw_comp_cons) {
 585                 struct sw_rx_bd *rx_buf = NULL;
 586                 struct sk_buff *skb;
 587                 union eth_rx_cqe *cqe;
 588                 struct eth_fast_path_rx_cqe *cqe_fp;
 589                 u8 cqe_fp_flags;
 590                 enum eth_rx_cqe_type cqe_fp_type;
 591                 u16 len, pad;
 592
 593 #ifdef BNX2X_STOP_ON_ERROR
 594                 if (unlikely(bp->panic))
 595                         return 0;
 596 #endif
 597
 598                 comp_ring_cons = RCQ_BD(sw_comp_cons);
 599                 bd_prod = RX_BD(bd_prod);
 600                 bd_cons = RX_BD(bd_cons);
 601
 602                 /* Prefetch the page containing the BD descriptor
 603                    at producer's index. It will be needed when new skb is
 604                    allocated */
 605                 prefetch((void *)(PAGE_ALIGN((unsigned long)
 606                                              (&fp->rx_desc_ring[bd_prod])) -
 607                                   PAGE_SIZE + 1));
 608
 609                 cqe = &fp->rx_comp_ring[comp_ring_cons];
 610                 cqe_fp = &cqe->fast_path_cqe;
 611                 cqe_fp_flags = cqe_fp->type_error_flags;
 612                 cqe_fp_type = cqe_fp_flags & ETH_FAST_PATH_RX_CQE_TYPE;
 613
 614                 DP(NETIF_MSG_RX_STATUS, "CQE type %x  err %x  status %x"
 615                    "  queue %x  vlan %x  len %u\n", CQE_TYPE(cqe_fp_flags),
 616                    cqe_fp_flags, cqe_fp->status_flags,
 617                    le32_to_cpu(cqe_fp->rss_hash_result),
 618                    le16_to_cpu(cqe_fp->vlan_tag), le16_to_cpu(cqe_fp->pkt_len));
 619
 620                 /* is this a slowpath msg? */
 621                 if (unlikely(CQE_TYPE_SLOW(cqe_fp_type))) {
 622                         bnx2x_sp_event(fp, cqe);
 623                         goto next_cqe;
 624
 625                 /* this is an rx packet */
 626                 } else {
 627                         rx_buf = &fp->rx_buf_ring[bd_cons];
 628                         skb = rx_buf->skb;
 629                         prefetch(skb);
 630
 631                         if (!CQE_TYPE_FAST(cqe_fp_type)) {
 632 #ifdef BNX2X_STOP_ON_ERROR
 633                                 /* sanity check */
 634                                 if (fp->disable_tpa &&
 635                                     (CQE_TYPE_START(cqe_fp_type) ||
 636                                      CQE_TYPE_STOP(cqe_fp_type)))
 637                                         BNX2X_ERR("START/STOP packet while "
 638                                                   "disable_tpa type %x\n",
 639                                                   CQE_TYPE(cqe_fp_type));
 640 #endif
 641
 642                                 if (CQE_TYPE_START(cqe_fp_type)) {
 643                                         u16 queue = cqe_fp->queue_index;
 644                                         DP(NETIF_MSG_RX_STATUS,
 645                                            "calling tpa_start on queue %d\n",
 646                                            queue);
 647
 648                                         bnx2x_tpa_start(fp, queue, skb,
 649                                                         bd_cons, bd_prod,
 650                                                         cqe_fp);
 651
 652                                         /* Set Toeplitz hash for LRO skb */
 653                                         bnx2x_set_skb_rxhash(bp, cqe, skb);
 654
 655                                         goto next_rx;
 656
 657                                 } else {
 658                                         u16 queue =
 659                                                 cqe->end_agg_cqe.queue_index;
 660                                         DP(NETIF_MSG_RX_STATUS,
 661                                            "calling tpa_stop on queue %d\n",
 662                                            queue);
 663
 664                                         bnx2x_tpa_stop(bp, fp, queue,
 665                                                        &cqe->end_agg_cqe,
 666                                                        comp_ring_cons);
 667 #ifdef BNX2X_STOP_ON_ERROR
 668                                         if (bp->panic)
 669                                                 return 0;
 670 #endif
 671
 672                                         bnx2x_update_sge_prod(fp, cqe_fp);
 673                                         goto next_cqe;
 674                                 }
 675                         }
 676                         /* non TPA */
 677                         len = le16_to_cpu(cqe_fp->pkt_len);
 678                         pad = cqe_fp->placement_offset;
 679                         dma_sync_single_for_cpu(&bp->pdev->dev,
 680                                         dma_unmap_addr(rx_buf, mapping),
 681                                                        pad + RX_COPY_THRESH,
 682                                                        DMA_FROM_DEVICE);
 683                         prefetch(((char *)(skb)) + L1_CACHE_BYTES);
 684
 685                         /* is this an error packet? */
 686                         if (unlikely(cqe_fp_flags & ETH_RX_ERROR_FALGS)) {
 687                                 DP(NETIF_MSG_RX_ERR,
 688                                    "ERROR  flags %x  rx packet %u\n",
 689                                    cqe_fp_flags, sw_comp_cons);
 690                                 fp->eth_q_stats.rx_err_discard_pkt++;
 691                                 goto reuse_rx;
 692                         }
 693
 694                         /* Since we don't have a jumbo ring
 695                          * copy small packets if mtu > 1500
 696                          */
 697                         if ((bp->dev->mtu > ETH_MAX_PACKET_SIZE) &&
 698                             (len <= RX_COPY_THRESH)) {
 699                                 struct sk_buff *new_skb;
 700
 701                                 new_skb = netdev_alloc_skb(bp->dev, len + pad);
 702                                 if (new_skb == NULL) {
 703                                         DP(NETIF_MSG_RX_ERR,
 704                                            "ERROR  packet dropped "
 705                                            "because of alloc failure\n");
 706                                         fp->eth_q_stats.rx_skb_alloc_failed++;
 707                                         goto reuse_rx;
 708                                 }
 709
 710                                 /* aligned copy */
 711                                 skb_copy_from_linear_data_offset(skb, pad,
 712                                                     new_skb->data + pad, len);
 713                                 skb_reserve(new_skb, pad);
 714                                 skb_put(new_skb, len);
 715
 716                                 bnx2x_reuse_rx_skb(fp, bd_cons, bd_prod);
 717
 718                                 skb = new_skb;
 719
 720                         } else
 721                         if (likely(bnx2x_alloc_rx_skb(bp, fp, bd_prod) == 0)) {
 722                                 dma_unmap_single(&bp->pdev->dev,
 723                                         dma_unmap_addr(rx_buf, mapping),
 724                                                  fp->rx_buf_size,
 725                                                  DMA_FROM_DEVICE);
 726                                 skb_reserve(skb, pad);
 727                                 skb_put(skb, len);
 728
 729                         } else {
 730                                 DP(NETIF_MSG_RX_ERR,
 731                                    "ERROR  packet dropped because "
 732                                    "of alloc failure\n");
 733                                 fp->eth_q_stats.rx_skb_alloc_failed++;
 734 reuse_rx:
 735                                 bnx2x_reuse_rx_skb(fp, bd_cons, bd_prod);
 736                                 goto next_rx;
 737                         }
 738
 739                         skb->protocol = eth_type_trans(skb, bp->dev);
 740
 741                         /* Set Toeplitz hash for a none-LRO skb */
 742                         bnx2x_set_skb_rxhash(bp, cqe, skb);
 743
 744                         skb_checksum_none_assert(skb);
 745
 746                         if (bp->dev->features & NETIF_F_RXCSUM) {
 747
 748                                 if (likely(BNX2X_RX_CSUM_OK(cqe)))
 749                                         skb->ip_summed = CHECKSUM_UNNECESSARY;
 750                                 else
 751                                         fp->eth_q_stats.hw_csum_err++;
 752                         }
 753                 }
 754
 755                 skb_record_rx_queue(skb, fp->index);
 756
 757                 if (le16_to_cpu(cqe_fp->pars_flags.flags) &
 758                     PARSING_FLAGS_VLAN)
 759                         __vlan_hwaccel_put_tag(skb,
 760                                                le16_to_cpu(cqe_fp->vlan_tag));
 761                 napi_gro_receive(&fp->napi, skb);
 762
 763
 764 next_rx:
 765                 rx_buf->skb = NULL;
 766
 767                 bd_cons = NEXT_RX_IDX(bd_cons);
 768                 bd_prod = NEXT_RX_IDX(bd_prod);
 769                 bd_prod_fw = NEXT_RX_IDX(bd_prod_fw);
 770                 rx_pkt++;
 771 next_cqe:
 772                 sw_comp_prod = NEXT_RCQ_IDX(sw_comp_prod);
 773                 sw_comp_cons = NEXT_RCQ_IDX(sw_comp_cons);
 774
 775                 if (rx_pkt == budget)
 776                         break;
 777         } /* while */
 778
 779         fp->rx_bd_cons = bd_cons;
 780         fp->rx_bd_prod = bd_prod_fw;
 781         fp->rx_comp_cons = sw_comp_cons;
 782         fp->rx_comp_prod = sw_comp_prod;
 783
 784         /* Update producers */
 785         bnx2x_update_rx_prod(bp, fp, bd_prod_fw, sw_comp_prod,
 786                              fp->rx_sge_prod);
 787
 788         fp->rx_pkt += rx_pkt;
 789         fp->rx_calls++;
 790
 791         return rx_pkt;
 792 }
 793
 794 static irqreturn_t bnx2x_msix_fp_int(int irq, void *fp_cookie)
 795 {
 796         struct bnx2x_fastpath *fp = fp_cookie;
 797         struct bnx2x *bp = fp->bp;
 798         u8 cos;
 799
 800         DP(BNX2X_MSG_FP, "got an MSI-X interrupt on IDX:SB "
 801                          "[fp %d fw_sd %d igusb %d]\n",
 802            fp->index, fp->fw_sb_id, fp->igu_sb_id);
 803         bnx2x_ack_sb(bp, fp->igu_sb_id, USTORM_ID, 0, IGU_INT_DISABLE, 0);
 804
 805 #ifdef BNX2X_STOP_ON_ERROR
 806         if (unlikely(bp->panic))
 807                 return IRQ_HANDLED;
 808 #endif
 809
 810         /* Handle Rx and Tx according to MSI-X vector */
 811         prefetch(fp->rx_cons_sb);
 812
 813         for_each_cos_in_tx_queue(fp, cos)
 814                 prefetch(fp->txdata[cos].tx_cons_sb);
 815
 816         prefetch(&fp->sb_running_index[SM_RX_ID]);
 817         napi_schedule(&bnx2x_fp(bp, fp->index, napi));
 818
 819         return IRQ_HANDLED;
 820 }
 821
 822 /* HW Lock for shared dual port PHYs */
 823 void bnx2x_acquire_phy_lock(struct bnx2x *bp)
 824 {
 825         mutex_lock(&bp->port.phy_mutex);
 826
 827         if (bp->port.need_hw_lock)
 828                 bnx2x_acquire_hw_lock(bp, HW_LOCK_RESOURCE_MDIO);
 829 }
 830
 831 void bnx2x_release_phy_lock(struct bnx2x *bp)
 832 {
 833         if (bp->port.need_hw_lock)
 834                 bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_MDIO);
 835
 836         mutex_unlock(&bp->port.phy_mutex);
 837 }
 838
 839 /* calculates MF speed according to current linespeed and MF configuration */
 840 u16 bnx2x_get_mf_speed(struct bnx2x *bp)
 841 {
 842         u16 line_speed = bp->link_vars.line_speed;
 843         if (IS_MF(bp)) {
 844                 u16 maxCfg = bnx2x_extract_max_cfg(bp,
 845                                                    bp->mf_config[BP_VN(bp)]);
 846
 847                 /* Calculate the current MAX line speed limit for the MF
 848                  * devices
 849                  */
 850                 if (IS_MF_SI(bp))
 851                         line_speed = (line_speed * maxCfg) / 100;
 852                 else { /* SD mode */
 853                         u16 vn_max_rate = maxCfg * 100;
 854
 855                         if (vn_max_rate < line_speed)
 856                                 line_speed = vn_max_rate;
 857                 }
 858         }
 859
 860         return line_speed;
 861 }
 862
 863 /**
 864  * bnx2x_fill_report_data - fill link report data to report
 865  *
 866  * @bp:         driver handle
 867  * @data:       link state to update
 868  *
 869  * It uses a none-atomic bit operations because is called under the mutex.
 870  */
 871 static inline void bnx2x_fill_report_data(struct bnx2x *bp,
 872                                           struct bnx2x_link_report_data *data)
 873 {
 874         u16 line_speed = bnx2x_get_mf_speed(bp);
 875
 876         memset(data, 0, sizeof(*data));
 877
 878         /* Fill the report data: efective line speed */
 879         data->line_speed = line_speed;
 880
 881         /* Link is down */
 882         if (!bp->link_vars.link_up || (bp->flags & MF_FUNC_DIS))
 883                 __set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
 884                           &data->link_report_flags);
 885
 886         /* Full DUPLEX */
 887         if (bp->link_vars.duplex == DUPLEX_FULL)
 888                 __set_bit(BNX2X_LINK_REPORT_FD, &data->link_report_flags);
 889
 890         /* Rx Flow Control is ON */
 891         if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_RX)
 892                 __set_bit(BNX2X_LINK_REPORT_RX_FC_ON, &data->link_report_flags);
 893
 894         /* Tx Flow Control is ON */
 895         if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_TX)
 896                 __set_bit(BNX2X_LINK_REPORT_TX_FC_ON, &data->link_report_flags);
 897 }
 898
 899 /**
 900  * bnx2x_link_report - report link status to OS.
 901  *
 902  * @bp:         driver handle
 903  *
 904  * Calls the __bnx2x_link_report() under the same locking scheme
 905  * as a link/PHY state managing code to ensure a consistent link
 906  * reporting.
 907  */
 908
 909 void bnx2x_link_report(struct bnx2x *bp)
 910 {
 911         bnx2x_acquire_phy_lock(bp);
 912         __bnx2x_link_report(bp);
 913         bnx2x_release_phy_lock(bp);
 914 }
 915
 916 /**
 917  * __bnx2x_link_report - report link status to OS.
 918  *
 919  * @bp:         driver handle
 920  *
 921  * None atomic inmlementation.
 922  * Should be called under the phy_lock.
 923  */
 924 void __bnx2x_link_report(struct bnx2x *bp)
 925 {
 926         struct bnx2x_link_report_data cur_data;
 927
 928         /* reread mf_cfg */
 929         if (!CHIP_IS_E1(bp))
 930                 bnx2x_read_mf_cfg(bp);
 931
 932         /* Read the current link report info */
 933         bnx2x_fill_report_data(bp, &cur_data);
 934
 935         /* Don't report link down or exactly the same link status twice */
 936         if (!memcmp(&cur_data, &bp->last_reported_link, sizeof(cur_data)) ||
 937             (test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
 938                       &bp->last_reported_link.link_report_flags) &&
 939              test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
 940                       &cur_data.link_report_flags)))
 941                 return;
 942
 943         bp->link_cnt++;
 944
 945         /* We are going to report a new link parameters now -
 946          * remember the current data for the next time.
 947          */
 948         memcpy(&bp->last_reported_link, &cur_data, sizeof(cur_data));
 949
 950         if (test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
 951                      &cur_data.link_report_flags)) {
 952                 netif_carrier_off(bp->dev);
 953                 netdev_err(bp->dev, "NIC Link is Down\n");
 954                 return;
 955         } else {
 956                 netif_carrier_on(bp->dev);
 957                 netdev_info(bp->dev, "NIC Link is Up, ");
 958                 pr_cont("%d Mbps ", cur_data.line_speed);
 959
 960                 if (test_and_clear_bit(BNX2X_LINK_REPORT_FD,
 961                                        &cur_data.link_report_flags))
 962                         pr_cont("full duplex");
 963                 else
 964                         pr_cont("half duplex");
 965
 966                 /* Handle the FC at the end so that only these flags would be
 967                  * possibly set. This way we may easily check if there is no FC
 968                  * enabled.
 969                  */
 970                 if (cur_data.link_report_flags) {
 971                         if (test_bit(BNX2X_LINK_REPORT_RX_FC_ON,
 972                                      &cur_data.link_report_flags)) {
 973                                 pr_cont(", receive ");
 974                                 if (test_bit(BNX2X_LINK_REPORT_TX_FC_ON,
 975                                      &cur_data.link_report_flags))
 976                                         pr_cont("& transmit ");
 977                         } else {
 978                                 pr_cont(", transmit ");
 979                         }
 980                         pr_cont("flow control ON");
 981                 }
 982                 pr_cont("\n");
 983         }
 984 }
 985
 986 void bnx2x_init_rx_rings(struct bnx2x *bp)
 987 {
 988         int func = BP_FUNC(bp);
 989         int max_agg_queues = CHIP_IS_E1(bp) ? ETH_MAX_AGGREGATION_QUEUES_E1 :
 990                                               ETH_MAX_AGGREGATION_QUEUES_E1H_E2;
 991         u16 ring_prod;
 992         int i, j;
 993
 994         /* Allocate TPA resources */
 995         for_each_rx_queue(bp, j) {
 996                 struct bnx2x_fastpath *fp = &bp->fp[j];
 997
 998                 DP(NETIF_MSG_IFUP,
 999                    "mtu %d  rx_buf_size %d\n", bp->dev->mtu, fp->rx_buf_size);
1000
1001                 if (!fp->disable_tpa) {
1002                         /* Fill the per-aggregtion pool */
1003                         for (i = 0; i < max_agg_queues; i++) {
1004                                 struct bnx2x_agg_info *tpa_info =
1005                                         &fp->tpa_info[i];
1006                                 struct sw_rx_bd *first_buf =
1007                                         &tpa_info->first_buf;
1008
1009                                 first_buf->skb = netdev_alloc_skb(bp->dev,
1010                                                        fp->rx_buf_size);
1011                                 if (!first_buf->skb) {
1012                                         BNX2X_ERR("Failed to allocate TPA "
1013                                                   "skb pool for queue[%d] - "
1014                                                   "disabling TPA on this "
1015                                                   "queue!\n", j);
1016                                         bnx2x_free_tpa_pool(bp, fp, i);
1017                                         fp->disable_tpa = 1;
1018                                         break;
1019                                 }
1020                                 dma_unmap_addr_set(first_buf, mapping, 0);
1021                                 tpa_info->tpa_state = BNX2X_TPA_STOP;
1022                         }
1023
1024                         /* "next page" elements initialization */
1025                         bnx2x_set_next_page_sgl(fp);
1026
1027                         /* set SGEs bit mask */
1028                         bnx2x_init_sge_ring_bit_mask(fp);
1029
1030                         /* Allocate SGEs and initialize the ring elements */
1031                         for (i = 0, ring_prod = 0;
1032                              i < MAX_RX_SGE_CNT*NUM_RX_SGE_PAGES; i++) {
1033
1034                                 if (bnx2x_alloc_rx_sge(bp, fp, ring_prod) < 0) {
1035                                         BNX2X_ERR("was only able to allocate "
1036                                                   "%d rx sges\n", i);
1037                                         BNX2X_ERR("disabling TPA for "
1038                                                   "queue[%d]\n", j);
1039                                         /* Cleanup already allocated elements */
1040                                         bnx2x_free_rx_sge_range(bp, fp,
1041                                                                 ring_prod);
1042                                         bnx2x_free_tpa_pool(bp, fp,
1043                                                             max_agg_queues);
1044                                         fp->disable_tpa = 1;
1045                                         ring_prod = 0;
1046                                         break;
1047                                 }
1048                                 ring_prod = NEXT_SGE_IDX(ring_prod);
1049                         }
1050
1051                         fp->rx_sge_prod = ring_prod;
1052                 }
1053         }
1054
1055         for_each_rx_queue(bp, j) {
1056                 struct bnx2x_fastpath *fp = &bp->fp[j];
1057
1058                 fp->rx_bd_cons = 0;
1059
1060                 /* Activate BD ring */
1061                 /* Warning!
1062                  * this will generate an interrupt (to the TSTORM)
1063                  * must only be done after chip is initialized
1064                  */
1065                 bnx2x_update_rx_prod(bp, fp, fp->rx_bd_prod, fp->rx_comp_prod,
1066                                      fp->rx_sge_prod);
1067
1068                 if (j != 0)
1069                         continue;
1070
1071                 if (CHIP_IS_E1(bp)) {
1072                         REG_WR(bp, BAR_USTRORM_INTMEM +
1073                                USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func),
1074                                U64_LO(fp->rx_comp_mapping));
1075                         REG_WR(bp, BAR_USTRORM_INTMEM +
1076                                USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func) + 4,
1077                                U64_HI(fp->rx_comp_mapping));
1078                 }
1079         }
1080 }
1081
1082 static void bnx2x_free_tx_skbs(struct bnx2x *bp)
1083 {
1084         int i;
1085         u8 cos;
1086
1087         for_each_tx_queue(bp, i) {
1088                 struct bnx2x_fastpath *fp = &bp->fp[i];
1089                 for_each_cos_in_tx_queue(fp, cos) {
1090                         struct bnx2x_fp_txdata *txdata = &fp->txdata[cos];
1091
1092                         u16 bd_cons = txdata->tx_bd_cons;
1093                         u16 sw_prod = txdata->tx_pkt_prod;
1094                         u16 sw_cons = txdata->tx_pkt_cons;
1095
1096                         while (sw_cons != sw_prod) {
1097                                 bd_cons = bnx2x_free_tx_pkt(bp, txdata,
1098                                                             TX_BD(sw_cons));
1099                                 sw_cons++;
1100                         }
1101                 }
1102         }
1103 }
1104
1105 static void bnx2x_free_rx_bds(struct bnx2x_fastpath *fp)
1106 {
1107         struct bnx2x *bp = fp->bp;
1108         int i;
1109
1110         /* ring wasn't allocated */
1111         if (fp->rx_buf_ring == NULL)
1112                 return;
1113
1114         for (i = 0; i < NUM_RX_BD; i++) {
1115                 struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[i];
1116                 struct sk_buff *skb = rx_buf->skb;
1117
1118                 if (skb == NULL)
1119                         continue;
1120                 dma_unmap_single(&bp->pdev->dev,
1121                                  dma_unmap_addr(rx_buf, mapping),
1122                                  fp->rx_buf_size, DMA_FROM_DEVICE);
1123
1124                 rx_buf->skb = NULL;
1125                 dev_kfree_skb(skb);
1126         }
1127 }
1128
1129 static void bnx2x_free_rx_skbs(struct bnx2x *bp)
1130 {
1131         int j;
1132
1133         for_each_rx_queue(bp, j) {
1134                 struct bnx2x_fastpath *fp = &bp->fp[j];
1135
1136                 bnx2x_free_rx_bds(fp);
1137
1138                 if (!fp->disable_tpa)
1139                         bnx2x_free_tpa_pool(bp, fp, CHIP_IS_E1(bp) ?
1140                                             ETH_MAX_AGGREGATION_QUEUES_E1 :
1141                                             ETH_MAX_AGGREGATION_QUEUES_E1H_E2);
1142         }
1143 }
1144
1145 void bnx2x_free_skbs(struct bnx2x *bp)
1146 {
1147         bnx2x_free_tx_skbs(bp);
1148         bnx2x_free_rx_skbs(bp);
1149 }
1150
1151 void bnx2x_update_max_mf_config(struct bnx2x *bp, u32 value)
1152 {
1153         /* load old values */
1154         u32 mf_cfg = bp->mf_config[BP_VN(bp)];
1155
1156         if (value != bnx2x_extract_max_cfg(bp, mf_cfg)) {
1157                 /* leave all but MAX value */
1158                 mf_cfg &= ~FUNC_MF_CFG_MAX_BW_MASK;
1159
1160                 /* set new MAX value */
1161                 mf_cfg |= (value << FUNC_MF_CFG_MAX_BW_SHIFT)
1162                                 & FUNC_MF_CFG_MAX_BW_MASK;
1163
1164                 bnx2x_fw_command(bp, DRV_MSG_CODE_SET_MF_BW, mf_cfg);
1165         }
1166 }
1167
1168 /**
1169  * bnx2x_free_msix_irqs - free previously requested MSI-X IRQ vectors
1170  *
1171  * @bp:         driver handle
1172  * @nvecs:      number of vectors to be released
1173  */
1174 static void bnx2x_free_msix_irqs(struct bnx2x *bp, int nvecs)
1175 {
1176         int i, offset = 0;
1177
1178         if (nvecs == offset)
1179                 return;
1180         free_irq(bp->msix_table[offset].vector, bp->dev);
1181         DP(NETIF_MSG_IFDOWN, "released sp irq (%d)\n",
1182            bp->msix_table[offset].vector);
1183         offset++;
1184 #ifdef BCM_CNIC
1185         if (nvecs == offset)
1186                 return;
1187         offset++;
1188 #endif
1189
1190         for_each_eth_queue(bp, i) {
1191                 if (nvecs == offset)
1192                         return;
1193                 DP(NETIF_MSG_IFDOWN, "about to release fp #%d->%d "
1194                    "irq\n", i, bp->msix_table[offset].vector);
1195
1196                 free_irq(bp->msix_table[offset++].vector, &bp->fp[i]);
1197         }
1198 }
1199
1200 void bnx2x_free_irq(struct bnx2x *bp)
1201 {
1202         if (bp->flags & USING_MSIX_FLAG)
1203                 bnx2x_free_msix_irqs(bp, BNX2X_NUM_ETH_QUEUES(bp) +
1204                                      CNIC_PRESENT + 1);
1205         else if (bp->flags & USING_MSI_FLAG)
1206                 free_irq(bp->pdev->irq, bp->dev);
1207         else
1208                 free_irq(bp->pdev->irq, bp->dev);
1209 }
1210
1211 int bnx2x_enable_msix(struct bnx2x *bp)
1212 {
1213         int msix_vec = 0, i, rc, req_cnt;
1214
1215         bp->msix_table[msix_vec].entry = msix_vec;
1216         DP(NETIF_MSG_IFUP, "msix_table[0].entry = %d (slowpath)\n",
1217            bp->msix_table[0].entry);
1218         msix_vec++;
1219
1220 #ifdef BCM_CNIC
1221         bp->msix_table[msix_vec].entry = msix_vec;
1222         DP(NETIF_MSG_IFUP, "msix_table[%d].entry = %d (CNIC)\n",
1223            bp->msix_table[msix_vec].entry, bp->msix_table[msix_vec].entry);
1224         msix_vec++;
1225 #endif
1226         /* We need separate vectors for ETH queues only (not FCoE) */
1227         for_each_eth_queue(bp, i) {
1228                 bp->msix_table[msix_vec].entry = msix_vec;
1229                 DP(NETIF_MSG_IFUP, "msix_table[%d].entry = %d "
1230                    "(fastpath #%u)\n", msix_vec, msix_vec, i);
1231                 msix_vec++;
1232         }
1233
1234         req_cnt = BNX2X_NUM_ETH_QUEUES(bp) + CNIC_PRESENT + 1;
1235
1236         rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], req_cnt);
1237
1238         /*
1239          * reconfigure number of tx/rx queues according to available
1240          * MSI-X vectors
1241          */
1242         if (rc >= BNX2X_MIN_MSIX_VEC_CNT) {
1243                 /* how less vectors we will have? */
1244                 int diff = req_cnt - rc;
1245
1246                 DP(NETIF_MSG_IFUP,
1247                    "Trying to use less MSI-X vectors: %d\n", rc);
1248
1249                 rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], rc);
1250
1251                 if (rc) {
1252                         DP(NETIF_MSG_IFUP,
1253                            "MSI-X is not attainable  rc %d\n", rc);
1254                         return rc;
1255                 }
1256                 /*
1257                  * decrease number of queues by number of unallocated entries
1258                  */
1259                 bp->num_queues -= diff;
1260
1261                 DP(NETIF_MSG_IFUP, "New queue configuration set: %d\n",
1262                                   bp->num_queues);
1263         } else if (rc) {
1264                 /* fall to INTx if not enough memory */
1265                 if (rc == -ENOMEM)
1266                         bp->flags |= DISABLE_MSI_FLAG;
1267                 DP(NETIF_MSG_IFUP, "MSI-X is not attainable  rc %d\n", rc);
1268                 return rc;
1269         }
1270
1271         bp->flags |= USING_MSIX_FLAG;
1272
1273         return 0;
1274 }
1275
1276 static int bnx2x_req_msix_irqs(struct bnx2x *bp)
1277 {
1278         int i, rc, offset = 0;
1279
1280         rc = request_irq(bp->msix_table[offset++].vector,
1281                          bnx2x_msix_sp_int, 0,
1282                          bp->dev->name, bp->dev);
1283         if (rc) {
1284                 BNX2X_ERR("request sp irq failed\n");
1285                 return -EBUSY;
1286         }
1287
1288 #ifdef BCM_CNIC
1289         offset++;
1290 #endif
1291         for_each_eth_queue(bp, i) {
1292                 struct bnx2x_fastpath *fp = &bp->fp[i];
1293                 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
1294                          bp->dev->name, i);
1295
1296                 rc = request_irq(bp->msix_table[offset].vector,
1297                                  bnx2x_msix_fp_int, 0, fp->name, fp);
1298                 if (rc) {
1299                         BNX2X_ERR("request fp #%d irq (%d) failed  rc %d\n", i,
1300                               bp->msix_table[offset].vector, rc);
1301                         bnx2x_free_msix_irqs(bp, offset);
1302                         return -EBUSY;
1303                 }
1304
1305                 offset++;
1306         }
1307
1308         i = BNX2X_NUM_ETH_QUEUES(bp);
1309         offset = 1 + CNIC_PRESENT;
1310         netdev_info(bp->dev, "using MSI-X  IRQs: sp %d  fp[%d] %d"
1311                " ... fp[%d] %d\n",
1312                bp->msix_table[0].vector,
1313                0, bp->msix_table[offset].vector,
1314                i - 1, bp->msix_table[offset + i - 1].vector);
1315
1316         return 0;
1317 }
1318
1319 int bnx2x_enable_msi(struct bnx2x *bp)
1320 {
1321         int rc;
1322
1323         rc = pci_enable_msi(bp->pdev);
1324         if (rc) {
1325                 DP(NETIF_MSG_IFUP, "MSI is not attainable\n");
1326                 return -1;
1327         }
1328         bp->flags |= USING_MSI_FLAG;
1329
1330         return 0;
1331 }
1332
1333 static int bnx2x_req_irq(struct bnx2x *bp)
1334 {
1335         unsigned long flags;
1336         int rc;
1337
1338         if (bp->flags & USING_MSI_FLAG)
1339                 flags = 0;
1340         else
1341                 flags = IRQF_SHARED;
1342
1343         rc = request_irq(bp->pdev->irq, bnx2x_interrupt, flags,
1344                          bp->dev->name, bp->dev);
1345         return rc;
1346 }
1347
1348 static inline int bnx2x_setup_irqs(struct bnx2x *bp)
1349 {
1350         int rc = 0;
1351         if (bp->flags & USING_MSIX_FLAG) {
1352                 rc = bnx2x_req_msix_irqs(bp);
1353                 if (rc)
1354                         return rc;
1355         } else {
1356                 bnx2x_ack_int(bp);
1357                 rc = bnx2x_req_irq(bp);
1358                 if (rc) {
1359                         BNX2X_ERR("IRQ request failed  rc %d, aborting\n", rc);
1360                         return rc;
1361                 }
1362                 if (bp->flags & USING_MSI_FLAG) {
1363                         bp->dev->irq = bp->pdev->irq;
1364                         netdev_info(bp->dev, "using MSI  IRQ %d\n",
1365                                bp->pdev->irq);
1366                 }
1367         }
1368
1369         return 0;
1370 }
1371
1372 static inline void bnx2x_napi_enable(struct bnx2x *bp)
1373 {
1374         int i;
1375
1376         for_each_rx_queue(bp, i)
1377                 napi_enable(&bnx2x_fp(bp, i, napi));
1378 }
1379
1380 static inline void bnx2x_napi_disable(struct bnx2x *bp)
1381 {
1382         int i;
1383
1384         for_each_rx_queue(bp, i)
1385                 napi_disable(&bnx2x_fp(bp, i, napi));
1386 }
1387
1388 void bnx2x_netif_start(struct bnx2x *bp)
1389 {
1390         if (netif_running(bp->dev)) {
1391                 bnx2x_napi_enable(bp);
1392                 bnx2x_int_enable(bp);
1393                 if (bp->state == BNX2X_STATE_OPEN)
1394                         netif_tx_wake_all_queues(bp->dev);
1395         }
1396 }
1397
1398 void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw)
1399 {
1400         bnx2x_int_disable_sync(bp, disable_hw);
1401         bnx2x_napi_disable(bp);
1402 }
1403
1404 u16 bnx2x_select_queue(struct net_device *dev, struct sk_buff *skb)
1405 {
1406         struct bnx2x *bp = netdev_priv(dev);
1407 #ifdef BCM_CNIC
1408         if (NO_FCOE(bp))
1409                 return skb_tx_hash(dev, skb);
1410         else {
1411                 struct ethhdr *hdr = (struct ethhdr *)skb->data;
1412                 u16 ether_type = ntohs(hdr->h_proto);
1413
1414                 /* Skip VLAN tag if present */
1415                 if (ether_type == ETH_P_8021Q) {
1416                         struct vlan_ethhdr *vhdr =
1417                                 (struct vlan_ethhdr *)skb->data;
1418
1419                         ether_type = ntohs(vhdr->h_vlan_encapsulated_proto);
1420                 }
1421
1422                 /* If ethertype is FCoE or FIP - use FCoE ring */
1423                 if ((ether_type == ETH_P_FCOE) || (ether_type == ETH_P_FIP))
1424                         return bnx2x_fcoe_tx(bp, txq_index);
1425         }
1426 #endif
1427         /* Select a none-FCoE queue:  if FCoE is enabled, exclude FCoE L2 ring
1428          */
1429         return __skb_tx_hash(dev, skb, BNX2X_NUM_ETH_QUEUES(bp));
1430 }
1431
1432 void bnx2x_set_num_queues(struct bnx2x *bp)
1433 {
1434         switch (bp->multi_mode) {
1435         case ETH_RSS_MODE_DISABLED:
1436                 bp->num_queues = 1;
1437                 break;
1438         case ETH_RSS_MODE_REGULAR:
1439                 bp->num_queues = bnx2x_calc_num_queues(bp);
1440                 break;
1441
1442         default:
1443                 bp->num_queues = 1;
1444                 break;
1445         }
1446
1447         /* Add special queues */
1448         bp->num_queues += NON_ETH_CONTEXT_USE;
1449 }
1450
1451 static inline int bnx2x_set_real_num_queues(struct bnx2x *bp)
1452 {
1453         int rc, tx, rx;
1454
1455         tx = MAX_TXQS_PER_COS * bp->max_cos;
1456         rx = BNX2X_NUM_ETH_QUEUES(bp);
1457
1458 /* account for fcoe queue */
1459 #ifdef BCM_CNIC
1460         if (!NO_FCOE(bp)) {
1461                 rx += FCOE_PRESENT;
1462                 tx += FCOE_PRESENT;
1463         }
1464 #endif
1465
1466         rc = netif_set_real_num_tx_queues(bp->dev, tx);
1467         if (rc) {
1468                 BNX2X_ERR("Failed to set real number of Tx queues: %d\n", rc);
1469                 return rc;
1470         }
1471         rc = netif_set_real_num_rx_queues(bp->dev, rx);
1472         if (rc) {
1473                 BNX2X_ERR("Failed to set real number of Rx queues: %d\n", rc);
1474                 return rc;
1475         }
1476
1477         DP(NETIF_MSG_DRV, "Setting real num queues to (tx, rx) (%d, %d)\n",
1478                           tx, rx);
1479
1480         return rc;
1481 }
1482
1483 static inline void bnx2x_set_rx_buf_size(struct bnx2x *bp)
1484 {
1485         int i;
1486
1487         for_each_queue(bp, i) {
1488                 struct bnx2x_fastpath *fp = &bp->fp[i];
1489
1490                 /* Always use a mini-jumbo MTU for the FCoE L2 ring */
1491                 if (IS_FCOE_IDX(i))
1492                         /*
1493                          * Although there are no IP frames expected to arrive to
1494                          * this ring we still want to add an
1495                          * IP_HEADER_ALIGNMENT_PADDING to prevent a buffer
1496                          * overrun attack.
1497                          */
1498                         fp->rx_buf_size =
1499                                 BNX2X_FCOE_MINI_JUMBO_MTU + ETH_OVREHEAD +
1500                                 BNX2X_FW_RX_ALIGN + IP_HEADER_ALIGNMENT_PADDING;
1501                 else
1502                         fp->rx_buf_size =
1503                                 bp->dev->mtu + ETH_OVREHEAD +
1504                                 BNX2X_FW_RX_ALIGN + IP_HEADER_ALIGNMENT_PADDING;
1505         }
1506 }
1507
1508 static inline int bnx2x_init_rss_pf(struct bnx2x *bp)
1509 {
1510         int i;
1511         u8 ind_table[T_ETH_INDIRECTION_TABLE_SIZE] = {0};
1512         u8 num_eth_queues = BNX2X_NUM_ETH_QUEUES(bp);
1513
1514         /*
1515          * Prepare the inital contents fo the indirection table if RSS is
1516          * enabled
1517          */
1518         if (bp->multi_mode != ETH_RSS_MODE_DISABLED) {
1519                 for (i = 0; i < sizeof(ind_table); i++)
1520                         ind_table[i] =
1521                                 bp->fp->cl_id + (i % num_eth_queues);
1522         }
1523
1524         /*
1525          * For 57710 and 57711 SEARCHER configuration (rss_keys) is
1526          * per-port, so if explicit configuration is needed , do it only
1527          * for a PMF.
1528          *
1529          * For 57712 and newer on the other hand it's a per-function
1530          * configuration.
1531          */
1532         return bnx2x_config_rss_pf(bp, ind_table,
1533                                    bp->port.pmf || !CHIP_IS_E1x(bp));
1534 }
1535
1536 int bnx2x_config_rss_pf(struct bnx2x *bp, u8 *ind_table, bool config_hash)
1537 {
1538         struct bnx2x_config_rss_params params = {0};
1539         int i;
1540
1541         /* Although RSS is meaningless when there is a single HW queue we
1542          * still need it enabled in order to have HW Rx hash generated.
1543          *
1544          * if (!is_eth_multi(bp))
1545          *      bp->multi_mode = ETH_RSS_MODE_DISABLED;
1546          */
1547
1548         params.rss_obj = &bp->rss_conf_obj;
1549
1550         __set_bit(RAMROD_COMP_WAIT, &params.ramrod_flags);
1551
1552         /* RSS mode */
1553         switch (bp->multi_mode) {
1554         case ETH_RSS_MODE_DISABLED:
1555                 __set_bit(BNX2X_RSS_MODE_DISABLED, &params.rss_flags);
1556                 break;
1557         case ETH_RSS_MODE_REGULAR:
1558                 __set_bit(BNX2X_RSS_MODE_REGULAR, &params.rss_flags);
1559                 break;
1560         case ETH_RSS_MODE_VLAN_PRI:
1561                 __set_bit(BNX2X_RSS_MODE_VLAN_PRI, &params.rss_flags);
1562                 break;
1563         case ETH_RSS_MODE_E1HOV_PRI:
1564                 __set_bit(BNX2X_RSS_MODE_E1HOV_PRI, &params.rss_flags);
1565                 break;
1566         case ETH_RSS_MODE_IP_DSCP:
1567                 __set_bit(BNX2X_RSS_MODE_IP_DSCP, &params.rss_flags);
1568                 break;
1569         default:
1570                 BNX2X_ERR("Unknown multi_mode: %d\n", bp->multi_mode);
1571                 return -EINVAL;
1572         }
1573
1574         /* If RSS is enabled */
1575         if (bp->multi_mode != ETH_RSS_MODE_DISABLED) {
1576                 /* RSS configuration */
1577                 __set_bit(BNX2X_RSS_IPV4, &params.rss_flags);
1578                 __set_bit(BNX2X_RSS_IPV4_TCP, &params.rss_flags);
1579                 __set_bit(BNX2X_RSS_IPV6, &params.rss_flags);
1580                 __set_bit(BNX2X_RSS_IPV6_TCP, &params.rss_flags);
1581
1582                 /* Hash bits */
1583                 params.rss_result_mask = MULTI_MASK;
1584
1585                 memcpy(params.ind_table, ind_table, sizeof(params.ind_table));
1586
1587                 if (config_hash) {
1588                         /* RSS keys */
1589                         for (i = 0; i < sizeof(params.rss_key) / 4; i++)
1590                                 params.rss_key[i] = random32();
1591
1592                         __set_bit(BNX2X_RSS_SET_SRCH, &params.rss_flags);
1593                 }
1594         }
1595
1596         return bnx2x_config_rss(bp, &params);
1597 }
1598
1599 static inline int bnx2x_init_hw(struct bnx2x *bp, u32 load_code)
1600 {
1601         struct bnx2x_func_state_params func_params = {0};
1602
1603         /* Prepare parameters for function state transitions */
1604         __set_bit(RAMROD_COMP_WAIT, &func_params.ramrod_flags);
1605
1606         func_params.f_obj = &bp->func_obj;
1607         func_params.cmd = BNX2X_F_CMD_HW_INIT;
1608
1609         func_params.params.hw_init.load_phase = load_code;
1610
1611         return bnx2x_func_state_change(bp, &func_params);
1612 }
1613
1614 /*
1615  * Cleans the object that have internal lists without sending
1616  * ramrods. Should be run when interrutps are disabled.
1617  */
1618 static void bnx2x_squeeze_objects(struct bnx2x *bp)
1619 {
1620         int rc;
1621         unsigned long ramrod_flags = 0, vlan_mac_flags = 0;
1622         struct bnx2x_mcast_ramrod_params rparam = {0};
1623         struct bnx2x_vlan_mac_obj *mac_obj = &bp->fp->mac_obj;
1624
1625         /***************** Cleanup MACs' object first *************************/
1626
1627         /* Wait for completion of requested */
1628         __set_bit(RAMROD_COMP_WAIT, &ramrod_flags);
1629         /* Perform a dry cleanup */
1630         __set_bit(RAMROD_DRV_CLR_ONLY, &ramrod_flags);
1631
1632         /* Clean ETH primary MAC */
1633         __set_bit(BNX2X_ETH_MAC, &vlan_mac_flags);
1634         rc = mac_obj->delete_all(bp, &bp->fp->mac_obj, &vlan_mac_flags,
1635                                  &ramrod_flags);
1636         if (rc != 0)
1637                 BNX2X_ERR("Failed to clean ETH MACs: %d\n", rc);
1638
1639         /* Cleanup UC list */
1640         vlan_mac_flags = 0;
1641         __set_bit(BNX2X_UC_LIST_MAC, &vlan_mac_flags);
1642         rc = mac_obj->delete_all(bp, mac_obj, &vlan_mac_flags,
1643                                  &ramrod_flags);
1644         if (rc != 0)
1645                 BNX2X_ERR("Failed to clean UC list MACs: %d\n", rc);
1646
1647         /***************** Now clean mcast object *****************************/
1648         rparam.mcast_obj = &bp->mcast_obj;
1649         __set_bit(RAMROD_DRV_CLR_ONLY, &rparam.ramrod_flags);
1650
1651         /* Add a DEL command... */
1652         rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_DEL);
1653         if (rc < 0)
1654                 BNX2X_ERR("Failed to add a new DEL command to a multi-cast "
1655                           "object: %d\n", rc);
1656
1657         /* ...and wait until all pending commands are cleared */
1658         rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_CONT);
1659         while (rc != 0) {
1660                 if (rc < 0) {
1661                         BNX2X_ERR("Failed to clean multi-cast object: %d\n",
1662                                   rc);
1663                         return;
1664                 }
1665
1666                 rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_CONT);
1667         }
1668 }
1669
1670 #ifndef BNX2X_STOP_ON_ERROR
1671 #define LOAD_ERROR_EXIT(bp, label) \
1672         do { \
1673                 (bp)->state = BNX2X_STATE_ERROR; \
1674                 goto label; \
1675         } while (0)
1676 #else
1677 #define LOAD_ERROR_EXIT(bp, label) \
1678         do { \
1679                 (bp)->state = BNX2X_STATE_ERROR; \
1680                 (bp)->panic = 1; \
1681                 return -EBUSY; \
1682         } while (0)
1683 #endif
1684
1685 /* must be called with rtnl_lock */
1686 int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
1687 {
1688         int port = BP_PORT(bp);
1689         u32 load_code;
1690         int i, rc;
1691
1692 #ifdef BNX2X_STOP_ON_ERROR
1693         if (unlikely(bp->panic))
1694                 return -EPERM;
1695 #endif
1696
1697         bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD;
1698
1699         /* Set the initial link reported state to link down */
1700         bnx2x_acquire_phy_lock(bp);
1701         memset(&bp->last_reported_link, 0, sizeof(bp->last_reported_link));
1702         __set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
1703                 &bp->last_reported_link.link_report_flags);
1704         bnx2x_release_phy_lock(bp);
1705
1706         /* must be called before memory allocation and HW init */
1707         bnx2x_ilt_set_info(bp);
1708
1709         /*
1710          * Zero fastpath structures preserving invariants like napi, which are
1711          * allocated only once, fp index, max_cos, bp pointer.
1712          * Also set fp->disable_tpa.
1713          */
1714         for_each_queue(bp, i)
1715                 bnx2x_bz_fp(bp, i);
1716
1717
1718         /* Set the receive queues buffer size */
1719         bnx2x_set_rx_buf_size(bp);
1720
1721         if (bnx2x_alloc_mem(bp))
1722                 return -ENOMEM;
1723
1724         /* As long as bnx2x_alloc_mem() may possibly update
1725          * bp->num_queues, bnx2x_set_real_num_queues() should always
1726          * come after it.
1727          */
1728         rc = bnx2x_set_real_num_queues(bp);
1729         if (rc) {
1730                 BNX2X_ERR("Unable to set real_num_queues\n");
1731                 LOAD_ERROR_EXIT(bp, load_error0);
1732         }
1733
1734         /* configure multi cos mappings in kernel.
1735          * this configuration may be overriden by a multi class queue discipline
1736          * or by a dcbx negotiation result.
1737          */
1738         bnx2x_setup_tc(bp->dev, bp->max_cos);
1739
1740         bnx2x_napi_enable(bp);
1741
1742         /* Send LOAD_REQUEST command to MCP
1743          * Returns the type of LOAD command:
1744          * if it is the first port to be initialized
1745          * common blocks should be initialized, otherwise - not
1746          */
1747         if (!BP_NOMCP(bp)) {
1748                 load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_REQ, 0);
1749                 if (!load_code) {
1750                         BNX2X_ERR("MCP response failure, aborting\n");
1751                         rc = -EBUSY;
1752                         LOAD_ERROR_EXIT(bp, load_error1);
1753                 }
1754                 if (load_code == FW_MSG_CODE_DRV_LOAD_REFUSED) {
1755                         rc = -EBUSY; /* other port in diagnostic mode */
1756                         LOAD_ERROR_EXIT(bp, load_error1);
1757                 }
1758
1759         } else {
1760                 int path = BP_PATH(bp);
1761
1762                 DP(NETIF_MSG_IFUP, "NO MCP - load counts[%d]      %d, %d, %d\n",
1763                    path, load_count[path][0], load_count[path][1],
1764                    load_count[path][2]);
1765                 load_count[path][0]++;
1766                 load_count[path][1 + port]++;
1767                 DP(NETIF_MSG_IFUP, "NO MCP - new load counts[%d]  %d, %d, %d\n",
1768                    path, load_count[path][0], load_count[path][1],
1769                    load_count[path][2]);
1770                 if (load_count[path][0] == 1)
1771                         load_code = FW_MSG_CODE_DRV_LOAD_COMMON;
1772                 else if (load_count[path][1 + port] == 1)
1773                         load_code = FW_MSG_CODE_DRV_LOAD_PORT;
1774                 else
1775                         load_code = FW_MSG_CODE_DRV_LOAD_FUNCTION;
1776         }
1777
1778         if ((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) ||
1779             (load_code == FW_MSG_CODE_DRV_LOAD_COMMON_CHIP) ||
1780             (load_code == FW_MSG_CODE_DRV_LOAD_PORT)) {
1781                 bp->port.pmf = 1;
1782                 /*
1783                  * We need the barrier to ensure the ordering between the
1784                  * writing to bp->port.pmf here and reading it from the
1785                  * bnx2x_periodic_task().
1786                  */
1787                 smp_mb();
1788                 queue_delayed_work(bnx2x_wq, &bp->period_task, 0);
1789         } else
1790                 bp->port.pmf = 0;
1791
1792         DP(NETIF_MSG_LINK, "pmf %d\n", bp->port.pmf);
1793
1794         /* Init Function state controlling object */
1795         bnx2x__init_func_obj(bp);
1796
1797         /* Initialize HW */
1798         rc = bnx2x_init_hw(bp, load_code);
1799         if (rc) {
1800                 BNX2X_ERR("HW init failed, aborting\n");
1801                 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
1802                 LOAD_ERROR_EXIT(bp, load_error2);
1803         }
1804
1805         /* Connect to IRQs */
1806         rc = bnx2x_setup_irqs(bp);
1807         if (rc) {
1808                 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
1809                 LOAD_ERROR_EXIT(bp, load_error2);
1810         }
1811
1812         /* Setup NIC internals and enable interrupts */
1813         bnx2x_nic_init(bp, load_code);
1814
1815         /* Init per-function objects */
1816         bnx2x_init_bp_objs(bp);
1817
1818         if (((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) ||
1819             (load_code == FW_MSG_CODE_DRV_LOAD_COMMON_CHIP)) &&
1820             (bp->common.shmem2_base)) {
1821                 if (SHMEM2_HAS(bp, dcc_support))
1822                         SHMEM2_WR(bp, dcc_support,
1823                                   (SHMEM_DCC_SUPPORT_DISABLE_ENABLE_PF_TLV |
1824                                    SHMEM_DCC_SUPPORT_BANDWIDTH_ALLOCATION_TLV));
1825         }
1826
1827         bp->state = BNX2X_STATE_OPENING_WAIT4_PORT;
1828         rc = bnx2x_func_start(bp);
1829         if (rc) {
1830                 BNX2X_ERR("Function start failed!\n");
1831                 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
1832                 LOAD_ERROR_EXIT(bp, load_error3);
1833         }
1834
1835         /* Send LOAD_DONE command to MCP */
1836         if (!BP_NOMCP(bp)) {
1837                 load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
1838                 if (!load_code) {
1839                         BNX2X_ERR("MCP response failure, aborting\n");
1840                         rc = -EBUSY;
1841                         LOAD_ERROR_EXIT(bp, load_error3);
1842                 }
1843         }
1844
1845         rc = bnx2x_setup_leading(bp);
1846         if (rc) {
1847                 BNX2X_ERR("Setup leading failed!\n");
1848                 LOAD_ERROR_EXIT(bp, load_error3);
1849         }
1850
1851 #ifdef BCM_CNIC
1852         /* Enable Timer scan */
1853         REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + port*4, 1);
1854 #endif
1855
1856         for_each_nondefault_queue(bp, i) {
1857                 rc = bnx2x_setup_queue(bp, &bp->fp[i], 0);
1858                 if (rc)
1859                         LOAD_ERROR_EXIT(bp, load_error4);
1860         }
1861
1862         rc = bnx2x_init_rss_pf(bp);
1863         if (rc)
1864                 LOAD_ERROR_EXIT(bp, load_error4);
1865
1866         /* Now when Clients are configured we are ready to work */
1867         bp->state = BNX2X_STATE_OPEN;
1868
1869         /* Configure a ucast MAC */
1870         rc = bnx2x_set_eth_mac(bp, true);
1871         if (rc)
1872                 LOAD_ERROR_EXIT(bp, load_error4);
1873
1874         if (bp->pending_max) {
1875                 bnx2x_update_max_mf_config(bp, bp->pending_max);
1876                 bp->pending_max = 0;
1877         }
1878
1879         if (bp->port.pmf)
1880                 bnx2x_initial_phy_init(bp, load_mode);
1881
1882         /* Start fast path */
1883
1884         /* Initialize Rx filter. */
1885         netif_addr_lock_bh(bp->dev);
1886         bnx2x_set_rx_mode(bp->dev);
1887         netif_addr_unlock_bh(bp->dev);
1888
1889         /* Start the Tx */
1890         switch (load_mode) {
1891         case LOAD_NORMAL:
1892                 /* Tx queue should be only reenabled */
1893                 netif_tx_wake_all_queues(bp->dev);
1894                 break;
1895
1896         case LOAD_OPEN:
1897                 netif_tx_start_all_queues(bp->dev);
1898                 smp_mb__after_clear_bit();
1899                 break;
1900
1901         case LOAD_DIAG:
1902                 bp->state = BNX2X_STATE_DIAG;
1903                 break;
1904
1905         default:
1906                 break;
1907         }
1908
1909         if (!bp->port.pmf)
1910                 bnx2x__link_status_update(bp);
1911
1912         /* start the timer */
1913         mod_timer(&bp->timer, jiffies + bp->current_interval);
1914
1915 #ifdef BCM_CNIC
1916         bnx2x_setup_cnic_irq_info(bp);
1917         if (bp->state == BNX2X_STATE_OPEN)
1918                 bnx2x_cnic_notify(bp, CNIC_CTL_START_CMD);
1919 #endif
1920         bnx2x_inc_load_cnt(bp);
1921
1922         /* Wait for all pending SP commands to complete */
1923         if (!bnx2x_wait_sp_comp(bp, ~0x0UL)) {
1924                 BNX2X_ERR("Timeout waiting for SP elements to complete\n");
1925                 bnx2x_nic_unload(bp, UNLOAD_CLOSE);
1926                 return -EBUSY;
1927         }
1928
1929         bnx2x_dcbx_init(bp);
1930         return 0;
1931
1932 #ifndef BNX2X_STOP_ON_ERROR
1933 load_error4:
1934 #ifdef BCM_CNIC
1935         /* Disable Timer scan */
1936         REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + port*4, 0);
1937 #endif
1938 load_error3:
1939         bnx2x_int_disable_sync(bp, 1);
1940
1941         /* Clean queueable objects */
1942         bnx2x_squeeze_objects(bp);
1943
1944         /* Free SKBs, SGEs, TPA pool and driver internals */
1945         bnx2x_free_skbs(bp);
1946         for_each_rx_queue(bp, i)
1947                 bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);
1948
1949         /* Release IRQs */
1950         bnx2x_free_irq(bp);
1951 load_error2:
1952         if (!BP_NOMCP(bp)) {
1953                 bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP, 0);
1954                 bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_DONE, 0);
1955         }
1956
1957         bp->port.pmf = 0;
1958 load_error1:
1959         bnx2x_napi_disable(bp);
1960 load_error0:
1961         bnx2x_free_mem(bp);
1962
1963         return rc;
1964 #endif /* ! BNX2X_STOP_ON_ERROR */
1965 }
1966
1967 /* must be called with rtnl_lock */
1968 int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode)
1969 {
1970         int i;
1971         bool global = false;
1972
1973         if ((bp->state == BNX2X_STATE_CLOSED) ||
1974             (bp->state == BNX2X_STATE_ERROR)) {
1975                 /* We can get here if the driver has been unloaded
1976                  * during parity error recovery and is either waiting for a
1977                  * leader to complete or for other functions to unload and
1978                  * then ifdown has been issued. In this case we want to
1979                  * unload and let other functions to complete a recovery
1980                  * process.
1981                  */
1982                 bp->recovery_state = BNX2X_RECOVERY_DONE;
1983                 bp->is_leader = 0;
1984                 bnx2x_release_leader_lock(bp);
1985                 smp_mb();
1986
1987                 DP(NETIF_MSG_HW, "Releasing a leadership...\n");
1988
1989                 return -EINVAL;
1990         }
1991
1992         /* Stop Tx */
1993         bnx2x_tx_disable(bp);
1994
1995 #ifdef BCM_CNIC
1996         bnx2x_cnic_notify(bp, CNIC_CTL_STOP_CMD);
1997 #endif
1998         bp->state = BNX2X_STATE_CLOSING_WAIT4_HALT;
1999         smp_mb();
2000
2001         bp->rx_mode = BNX2X_RX_MODE_NONE;
2002
2003         del_timer_sync(&bp->timer);
2004
2005         /* Set ALWAYS_ALIVE bit in shmem */
2006         bp->fw_drv_pulse_wr_seq |= DRV_PULSE_ALWAYS_ALIVE;
2007
2008         bnx2x_drv_pulse(bp);
2009
2010         bnx2x_stats_handle(bp, STATS_EVENT_STOP);
2011
2012         /* Cleanup the chip if needed */
2013         if (unload_mode != UNLOAD_RECOVERY)
2014                 bnx2x_chip_cleanup(bp, unload_mode);
2015         else {
2016                 /* Send the UNLOAD_REQUEST to the MCP */
2017                 bnx2x_send_unload_req(bp, unload_mode);
2018
2019                 /*
2020                  * Prevent transactions to host from the functions on the
2021                  * engine that doesn't reset global blocks in case of global
2022                  * attention once gloabl blocks are reset and gates are opened
2023                  * (the engine which leader will perform the recovery
2024                  * last).
2025                  */
2026                 if (!CHIP_IS_E1x(bp))
2027                         bnx2x_pf_disable(bp);
2028
2029                 /* Disable HW interrupts, NAPI */
2030                 bnx2x_netif_stop(bp, 1);
2031
2032                 /* Release IRQs */
2033                 bnx2x_free_irq(bp);
2034
2035                 /* Report UNLOAD_DONE to MCP */
2036                 bnx2x_send_unload_done(bp);
2037         }
2038
2039         /*
2040          * At this stage no more interrupts will arrive so we may safly clean
2041          * the queueable objects here in case they failed to get cleaned so far.
2042          */
2043         bnx2x_squeeze_objects(bp);
2044
2045         /* There should be no more pending SP commands at this stage */
2046         bp->sp_state = 0;
2047
2048         bp->port.pmf = 0;
2049
2050         /* Free SKBs, SGEs, TPA pool and driver internals */
2051         bnx2x_free_skbs(bp);
2052         for_each_rx_queue(bp, i)
2053                 bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);
2054
2055         bnx2x_free_mem(bp);
2056
2057         bp->state = BNX2X_STATE_CLOSED;
2058
2059         /* Check if there are pending parity attentions. If there are - set
2060          * RECOVERY_IN_PROGRESS.
2061          */
2062         if (bnx2x_chk_parity_attn(bp, &global, false)) {
2063                 bnx2x_set_reset_in_progress(bp);
2064
2065                 /* Set RESET_IS_GLOBAL if needed */
2066                 if (global)
2067                         bnx2x_set_reset_global(bp);
2068         }
2069
2070
2071         /* The last driver must disable a "close the gate" if there is no
2072          * parity attention or "process kill" pending.
2073          */
2074         if (!bnx2x_dec_load_cnt(bp) && bnx2x_reset_is_done(bp, BP_PATH(bp)))
2075                 bnx2x_disable_close_the_gate(bp);
2076
2077         return 0;
2078 }
2079
2080 int bnx2x_set_power_state(struct bnx2x *bp, pci_power_t state)
2081 {
2082         u16 pmcsr;
2083
2084         /* If there is no power capability, silently succeed */
2085         if (!bp->pm_cap) {
2086                 DP(NETIF_MSG_HW, "No power capability. Breaking.\n");
2087                 return 0;
2088         }
2089
2090         pci_read_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL, &pmcsr);
2091
2092         switch (state) {
2093         case PCI_D0:
2094                 pci_write_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL,
2095                                       ((pmcsr & ~PCI_PM_CTRL_STATE_MASK) |
2096                                        PCI_PM_CTRL_PME_STATUS));
2097
2098                 if (pmcsr & PCI_PM_CTRL_STATE_MASK)
2099                         /* delay required during transition out of D3hot */
2100                         msleep(20);
2101                 break;
2102
2103         case PCI_D3hot:
2104                 /* If there are other clients above don't
2105                    shut down the power */
2106                 if (atomic_read(&bp->pdev->enable_cnt) != 1)
2107                         return 0;
2108                 /* Don't shut down the power for emulation and FPGA */
2109                 if (CHIP_REV_IS_SLOW(bp))
2110                         return 0;
2111
2112                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
2113                 pmcsr |= 3;
2114
2115                 if (bp->wol)
2116                         pmcsr |= PCI_PM_CTRL_PME_ENABLE;
2117
2118                 pci_write_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL,
2119                                       pmcsr);
2120
2121                 /* No more memory access after this point until
2122                 * device is brought back to D0.
2123                 */
2124                 break;
2125
2126         default:
2127                 return -EINVAL;
2128         }
2129         return 0;
2130 }
2131
2132 /*
2133  * net_device service functions
2134  */
2135 int bnx2x_poll(struct napi_struct *napi, int budget)
2136 {
2137         int work_done = 0;
2138         u8 cos;
2139         struct bnx2x_fastpath *fp = container_of(napi, struct bnx2x_fastpath,
2140                                                  napi);
2141         struct bnx2x *bp = fp->bp;
2142
2143         while (1) {
2144 #ifdef BNX2X_STOP_ON_ERROR
2145                 if (unlikely(bp->panic)) {
2146                         napi_complete(napi);
2147                         return 0;
2148                 }
2149 #endif
2150
2151                 for_each_cos_in_tx_queue(fp, cos)
2152                         if (bnx2x_tx_queue_has_work(&fp->txdata[cos]))
2153                                 bnx2x_tx_int(bp, &fp->txdata[cos]);
2154
2155
2156                 if (bnx2x_has_rx_work(fp)) {
2157                         work_done += bnx2x_rx_int(fp, budget - work_done);
2158
2159                         /* must not complete if we consumed full budget */
2160                         if (work_done >= budget)
2161                                 break;
2162                 }
2163
2164                 /* Fall out from the NAPI loop if needed */
2165                 if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) {
2166 #ifdef BCM_CNIC
2167                         /* No need to update SB for FCoE L2 ring as long as
2168                          * it's connected to the default SB and the SB
2169                          * has been updated when NAPI was scheduled.
2170                          */
2171                         if (IS_FCOE_FP(fp)) {
2172                                 napi_complete(napi);
2173                                 break;
2174                         }
2175 #endif
2176
2177                         bnx2x_update_fpsb_idx(fp);
2178                         /* bnx2x_has_rx_work() reads the status block,
2179                          * thus we need to ensure that status block indices
2180                          * have been actually read (bnx2x_update_fpsb_idx)
2181                          * prior to this check (bnx2x_has_rx_work) so that
2182                          * we won't write the "newer" value of the status block
2183                          * to IGU (if there was a DMA right after
2184                          * bnx2x_has_rx_work and if there is no rmb, the memory
2185                          * reading (bnx2x_update_fpsb_idx) may be postponed
2186                          * to right before bnx2x_ack_sb). In this case there
2187                          * will never be another interrupt until there is
2188                          * another update of the status block, while there
2189                          * is still unhandled work.
2190                          */
2191                         rmb();
2192
2193                         if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) {
2194                                 napi_complete(napi);
2195                                 /* Re-enable interrupts */
2196                                 DP(NETIF_MSG_HW,
2197                                    "Update index to %d\n", fp->fp_hc_idx);
2198                                 bnx2x_ack_sb(bp, fp->igu_sb_id, USTORM_ID,
2199                                              le16_to_cpu(fp->fp_hc_idx),
2200                                              IGU_INT_ENABLE, 1);
2201                                 break;
2202                         }
2203                 }
2204         }
2205
2206         return work_done;
2207 }
2208
2209 /* we split the first BD into headers and data BDs
2210  * to ease the pain of our fellow microcode engineers
2211  * we use one mapping for both BDs
2212  * So far this has only been observed to happen
2213  * in Other Operating Systems(TM)
2214  */
2215 static noinline u16 bnx2x_tx_split(struct bnx2x *bp,
2216                                    struct bnx2x_fp_txdata *txdata,
2217                                    struct sw_tx_bd *tx_buf,
2218                                    struct eth_tx_start_bd **tx_bd, u16 hlen,
2219                                    u16 bd_prod, int nbd)
2220 {
2221         struct eth_tx_start_bd *h_tx_bd = *tx_bd;
2222         struct eth_tx_bd *d_tx_bd;
2223         dma_addr_t mapping;
2224         int old_len = le16_to_cpu(h_tx_bd->nbytes);
2225
2226         /* first fix first BD */
2227         h_tx_bd->nbd = cpu_to_le16(nbd);
2228         h_tx_bd->nbytes = cpu_to_le16(hlen);
2229
2230         DP(NETIF_MSG_TX_QUEUED, "TSO split header size is %d "
2231            "(%x:%x) nbd %d\n", h_tx_bd->nbytes, h_tx_bd->addr_hi,
2232            h_tx_bd->addr_lo, h_tx_bd->nbd);
2233
2234         /* now get a new data BD
2235          * (after the pbd) and fill it */
2236         bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
2237         d_tx_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
2238
2239         mapping = HILO_U64(le32_to_cpu(h_tx_bd->addr_hi),
2240                            le32_to_cpu(h_tx_bd->addr_lo)) + hlen;
2241
2242         d_tx_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
2243         d_tx_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
2244         d_tx_bd->nbytes = cpu_to_le16(old_len - hlen);
2245
2246         /* this marks the BD as one that has no individual mapping */
2247         tx_buf->flags |= BNX2X_TSO_SPLIT_BD;
2248
2249         DP(NETIF_MSG_TX_QUEUED,
2250            "TSO split data size is %d (%x:%x)\n",
2251            d_tx_bd->nbytes, d_tx_bd->addr_hi, d_tx_bd->addr_lo);
2252
2253         /* update tx_bd */
2254         *tx_bd = (struct eth_tx_start_bd *)d_tx_bd;
2255
2256         return bd_prod;
2257 }
2258
2259 static inline u16 bnx2x_csum_fix(unsigned char *t_header, u16 csum, s8 fix)
2260 {
2261         if (fix > 0)
2262                 csum = (u16) ~csum_fold(csum_sub(csum,
2263                                 csum_partial(t_header - fix, fix, 0)));
2264
2265         else if (fix < 0)
2266                 csum = (u16) ~csum_fold(csum_add(csum,
2267                                 csum_partial(t_header, -fix, 0)));
2268
2269         return swab16(csum);
2270 }
2271
2272 static inline u32 bnx2x_xmit_type(struct bnx2x *bp, struct sk_buff *skb)
2273 {
2274         u32 rc;
2275
2276         if (skb->ip_summed != CHECKSUM_PARTIAL)
2277                 rc = XMIT_PLAIN;
2278
2279         else {
2280                 if (vlan_get_protocol(skb) == htons(ETH_P_IPV6)) {
2281                         rc = XMIT_CSUM_V6;
2282                         if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2283                                 rc |= XMIT_CSUM_TCP;
2284
2285                 } else {
2286                         rc = XMIT_CSUM_V4;
2287                         if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2288                                 rc |= XMIT_CSUM_TCP;
2289                 }
2290         }
2291
2292         if (skb_is_gso_v6(skb))
2293                 rc |= XMIT_GSO_V6 | XMIT_CSUM_TCP | XMIT_CSUM_V6;
2294         else if (skb_is_gso(skb))
2295                 rc |= XMIT_GSO_V4 | XMIT_CSUM_V4 | XMIT_CSUM_TCP;
2296
2297         return rc;
2298 }
2299
2300 #if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3)
2301 /* check if packet requires linearization (packet is too fragmented)
2302    no need to check fragmentation if page size > 8K (there will be no
2303    violation to FW restrictions) */
2304 static int bnx2x_pkt_req_lin(struct bnx2x *bp, struct sk_buff *skb,
2305                              u32 xmit_type)
2306 {
2307         int to_copy = 0;
2308         int hlen = 0;
2309         int first_bd_sz = 0;
2310
2311         /* 3 = 1 (for linear data BD) + 2 (for PBD and last BD) */
2312         if (skb_shinfo(skb)->nr_frags >= (MAX_FETCH_BD - 3)) {
2313
2314                 if (xmit_type & XMIT_GSO) {
2315                         unsigned short lso_mss = skb_shinfo(skb)->gso_size;
2316                         /* Check if LSO packet needs to be copied:
2317                            3 = 1 (for headers BD) + 2 (for PBD and last BD) */
2318                         int wnd_size = MAX_FETCH_BD - 3;
2319                         /* Number of windows to check */
2320                         int num_wnds = skb_shinfo(skb)->nr_frags - wnd_size;
2321                         int wnd_idx = 0;
2322                         int frag_idx = 0;
2323                         u32 wnd_sum = 0;
2324
2325                         /* Headers length */
2326                         hlen = (int)(skb_transport_header(skb) - skb->data) +
2327                                 tcp_hdrlen(skb);
2328
2329                         /* Amount of data (w/o headers) on linear part of SKB*/
2330                         first_bd_sz = skb_headlen(skb) - hlen;
2331
2332                         wnd_sum  = first_bd_sz;
2333
2334                         /* Calculate the first sum - it's special */
2335                         for (frag_idx = 0; frag_idx < wnd_size - 1; frag_idx++)
2336                                 wnd_sum +=
2337                                         skb_shinfo(skb)->frags[frag_idx].size;
2338
2339                         /* If there was data on linear skb data - check it */
2340                         if (first_bd_sz > 0) {
2341                                 if (unlikely(wnd_sum < lso_mss)) {
2342                                         to_copy = 1;
2343                                         goto exit_lbl;
2344                                 }
2345
2346                                 wnd_sum -= first_bd_sz;
2347                         }
2348
2349                         /* Others are easier: run through the frag list and
2350                            check all windows */
2351                         for (wnd_idx = 0; wnd_idx <= num_wnds; wnd_idx++) {
2352                                 wnd_sum +=
2353                           skb_shinfo(skb)->frags[wnd_idx + wnd_size - 1].size;
2354
2355                                 if (unlikely(wnd_sum < lso_mss)) {
2356                                         to_copy = 1;
2357                                         break;
2358                                 }
2359                                 wnd_sum -=
2360                                         skb_shinfo(skb)->frags[wnd_idx].size;
2361                         }
2362                 } else {
2363                         /* in non-LSO too fragmented packet should always
2364                            be linearized */
2365                         to_copy = 1;
2366                 }
2367         }
2368
2369 exit_lbl:
2370         if (unlikely(to_copy))
2371                 DP(NETIF_MSG_TX_QUEUED,
2372                    "Linearization IS REQUIRED for %s packet. "
2373                    "num_frags %d  hlen %d  first_bd_sz %d\n",
2374                    (xmit_type & XMIT_GSO) ? "LSO" : "non-LSO",
2375                    skb_shinfo(skb)->nr_frags, hlen, first_bd_sz);
2376
2377         return to_copy;
2378 }
2379 #endif
2380
2381 static inline void bnx2x_set_pbd_gso_e2(struct sk_buff *skb, u32 *parsing_data,
2382                                         u32 xmit_type)
2383 {
2384         *parsing_data |= (skb_shinfo(skb)->gso_size <<
2385                               ETH_TX_PARSE_BD_E2_LSO_MSS_SHIFT) &
2386                               ETH_TX_PARSE_BD_E2_LSO_MSS;
2387         if ((xmit_type & XMIT_GSO_V6) &&
2388             (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2389                 *parsing_data |= ETH_TX_PARSE_BD_E2_IPV6_WITH_EXT_HDR;
2390 }
2391
2392 /**
2393  * bnx2x_set_pbd_gso - update PBD in GSO case.
2394  *
2395  * @skb:        packet skb
2396  * @pbd:        parse BD
2397  * @xmit_type:  xmit flags
2398  */
2399 static inline void bnx2x_set_pbd_gso(struct sk_buff *skb,
2400                                      struct eth_tx_parse_bd_e1x *pbd,
2401                                      u32 xmit_type)
2402 {
2403         pbd->lso_mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
2404         pbd->tcp_send_seq = swab32(tcp_hdr(skb)->seq);
2405         pbd->tcp_flags = pbd_tcp_flags(skb);
2406
2407         if (xmit_type & XMIT_GSO_V4) {
2408                 pbd->ip_id = swab16(ip_hdr(skb)->id);
2409                 pbd->tcp_pseudo_csum =
2410                         swab16(~csum_tcpudp_magic(ip_hdr(skb)->saddr,
2411                                                   ip_hdr(skb)->daddr,
2412                                                   0, IPPROTO_TCP, 0));
2413
2414         } else
2415                 pbd->tcp_pseudo_csum =
2416                         swab16(~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2417                                                 &ipv6_hdr(skb)->daddr,
2418                                                 0, IPPROTO_TCP, 0));
2419
2420         pbd->global_data |= ETH_TX_PARSE_BD_E1X_PSEUDO_CS_WITHOUT_LEN;
2421 }
2422
2423 /**
2424  * bnx2x_set_pbd_csum_e2 - update PBD with checksum and return header length
2425  *
2426  * @bp:                 driver handle
2427  * @skb:                packet skb
2428  * @parsing_data:       data to be updated
2429  * @xmit_type:          xmit flags
2430  *
2431  * 57712 related
2432  */
2433 static inline  u8 bnx2x_set_pbd_csum_e2(struct bnx2x *bp, struct sk_buff *skb,
2434         u32 *parsing_data, u32 xmit_type)
2435 {
2436         *parsing_data |=
2437                         ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) <<
2438                         ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W_SHIFT) &
2439                         ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W;
2440
2441         if (xmit_type & XMIT_CSUM_TCP) {
2442                 *parsing_data |= ((tcp_hdrlen(skb) / 4) <<
2443                         ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW_SHIFT) &
2444                         ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW;
2445
2446                 return skb_transport_header(skb) + tcp_hdrlen(skb) - skb->data;
2447         } else
2448                 /* We support checksum offload for TCP and UDP only.
2449                  * No need to pass the UDP header length - it's a constant.
2450                  */
2451                 return skb_transport_header(skb) +
2452                                 sizeof(struct udphdr) - skb->data;
2453 }
2454
2455 static inline void bnx2x_set_sbd_csum(struct bnx2x *bp, struct sk_buff *skb,
2456         struct eth_tx_start_bd *tx_start_bd, u32 xmit_type)
2457 {
2458         tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_L4_CSUM;
2459
2460         if (xmit_type & XMIT_CSUM_V4)
2461                 tx_start_bd->bd_flags.as_bitfield |=
2462                                         ETH_TX_BD_FLAGS_IP_CSUM;
2463         else
2464                 tx_start_bd->bd_flags.as_bitfield |=
2465                                         ETH_TX_BD_FLAGS_IPV6;
2466
2467         if (!(xmit_type & XMIT_CSUM_TCP))
2468                 tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_IS_UDP;
2469 }
2470
2471 /**
2472  * bnx2x_set_pbd_csum - update PBD with checksum and return header length
2473  *
2474  * @bp:         driver handle
2475  * @skb:        packet skb
2476  * @pbd:        parse BD to be updated
2477  * @xmit_type:  xmit flags
2478  */
2479 static inline u8 bnx2x_set_pbd_csum(struct bnx2x *bp, struct sk_buff *skb,
2480         struct eth_tx_parse_bd_e1x *pbd,
2481         u32 xmit_type)
2482 {
2483         u8 hlen = (skb_network_header(skb) - skb->data) >> 1;
2484
2485         /* for now NS flag is not used in Linux */
2486         pbd->global_data =
2487                 (hlen | ((skb->protocol == cpu_to_be16(ETH_P_8021Q)) <<
2488                          ETH_TX_PARSE_BD_E1X_LLC_SNAP_EN_SHIFT));
2489
2490         pbd->ip_hlen_w = (skb_transport_header(skb) -
2491                         skb_network_header(skb)) >> 1;
2492
2493         hlen += pbd->ip_hlen_w;
2494
2495         /* We support checksum offload for TCP and UDP only */
2496         if (xmit_type & XMIT_CSUM_TCP)
2497                 hlen += tcp_hdrlen(skb) / 2;
2498         else
2499                 hlen += sizeof(struct udphdr) / 2;
2500
2501         pbd->total_hlen_w = cpu_to_le16(hlen);
2502         hlen = hlen*2;
2503
2504         if (xmit_type & XMIT_CSUM_TCP) {
2505                 pbd->tcp_pseudo_csum = swab16(tcp_hdr(skb)->check);
2506
2507         } else {
2508                 s8 fix = SKB_CS_OFF(skb); /* signed! */
2509
2510                 DP(NETIF_MSG_TX_QUEUED,
2511                    "hlen %d  fix %d  csum before fix %x\n",
2512                    le16_to_cpu(pbd->total_hlen_w), fix, SKB_CS(skb));
2513
2514                 /* HW bug: fixup the CSUM */
2515                 pbd->tcp_pseudo_csum =
2516                         bnx2x_csum_fix(skb_transport_header(skb),
2517                                        SKB_CS(skb), fix);
2518
2519                 DP(NETIF_MSG_TX_QUEUED, "csum after fix %x\n",
2520                    pbd->tcp_pseudo_csum);
2521         }
2522
2523         return hlen;
2524 }
2525
2526 /* called with netif_tx_lock
2527  * bnx2x_tx_int() runs without netif_tx_lock unless it needs to call
2528  * netif_wake_queue()
2529  */
2530 netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev)
2531 {
2532         struct bnx2x *bp = netdev_priv(dev);
2533
2534         struct bnx2x_fastpath *fp;
2535         struct netdev_queue *txq;
2536         struct bnx2x_fp_txdata *txdata;
2537         struct sw_tx_bd *tx_buf;
2538         struct eth_tx_start_bd *tx_start_bd, *first_bd;
2539         struct eth_tx_bd *tx_data_bd, *total_pkt_bd = NULL;
2540         struct eth_tx_parse_bd_e1x *pbd_e1x = NULL;
2541         struct eth_tx_parse_bd_e2 *pbd_e2 = NULL;
2542         u32 pbd_e2_parsing_data = 0;
2543         u16 pkt_prod, bd_prod;
2544         int nbd, txq_index, fp_index, txdata_index;
2545         dma_addr_t mapping;
2546         u32 xmit_type = bnx2x_xmit_type(bp, skb);
2547         int i;
2548         u8 hlen = 0;
2549         __le16 pkt_size = 0;
2550         struct ethhdr *eth;
2551         u8 mac_type = UNICAST_ADDRESS;
2552
2553 #ifdef BNX2X_STOP_ON_ERROR
2554         if (unlikely(bp->panic))
2555                 return NETDEV_TX_BUSY;
2556 #endif
2557
2558         txq_index = skb_get_queue_mapping(skb);
2559         txq = netdev_get_tx_queue(dev, txq_index);
2560
2561         BUG_ON(txq_index >= MAX_ETH_TXQ_IDX(bp) + FCOE_PRESENT);
2562
2563         /* decode the fastpath index and the cos index from the txq */
2564         fp_index = TXQ_TO_FP(txq_index);
2565         txdata_index = TXQ_TO_COS(txq_index);
2566
2567 #ifdef BCM_CNIC
2568         /*
2569          * Override the above for the FCoE queue:
2570          *   - FCoE fp entry is right after the ETH entries.
2571          *   - FCoE L2 queue uses bp->txdata[0] only.
2572          */
2573         if (unlikely(!NO_FCOE(bp) && (txq_index ==
2574                                       bnx2x_fcoe_tx(bp, txq_index)))) {
2575                 fp_index = FCOE_IDX;
2576                 txdata_index = 0;
2577         }
2578 #endif
2579
2580         /* enable this debug print to view the transmission queue being used
2581         DP(BNX2X_MSG_FP, "indices: txq %d, fp %d, txdata %d",
2582            txq_index, fp_index, txdata_index); */
2583
2584         /* locate the fastpath and the txdata */
2585         fp = &bp->fp[fp_index];
2586         txdata = &fp->txdata[txdata_index];
2587
2588         /* enable this debug print to view the tranmission details
2589         DP(BNX2X_MSG_FP,"transmitting packet cid %d fp index %d txdata_index %d"
2590                         " tx_data ptr %p fp pointer %p",
2591            txdata->cid, fp_index, txdata_index, txdata, fp); */
2592
2593         if (unlikely(bnx2x_tx_avail(bp, txdata) <
2594                      (skb_shinfo(skb)->nr_frags + 3))) {
2595                 fp->eth_q_stats.driver_xoff++;
2596                 netif_tx_stop_queue(txq);
2597                 BNX2X_ERR("BUG! Tx ring full when queue awake!\n");
2598                 return NETDEV_TX_BUSY;
2599         }
2600
2601         DP(NETIF_MSG_TX_QUEUED, "queue[%d]: SKB: summed %x  protocol %x  "
2602                                 "protocol(%x,%x) gso type %x  xmit_type %x\n",
2603            txq_index, skb->ip_summed, skb->protocol, ipv6_hdr(skb)->nexthdr,
2604            ip_hdr(skb)->protocol, skb_shinfo(skb)->gso_type, xmit_type);
2605
2606         eth = (struct ethhdr *)skb->data;
2607
2608         /* set flag according to packet type (UNICAST_ADDRESS is default)*/
2609         if (unlikely(is_multicast_ether_addr(eth->h_dest))) {
2610                 if (is_broadcast_ether_addr(eth->h_dest))
2611                         mac_type = BROADCAST_ADDRESS;
2612                 else
2613                         mac_type = MULTICAST_ADDRESS;
2614         }
2615
2616 #if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3)
2617         /* First, check if we need to linearize the skb (due to FW
2618            restrictions). No need to check fragmentation if page size > 8K
2619            (there will be no violation to FW restrictions) */
2620         if (bnx2x_pkt_req_lin(bp, skb, xmit_type)) {
2621                 /* Statistics of linearization */
2622                 bp->lin_cnt++;
2623                 if (skb_linearize(skb) != 0) {
2624                         DP(NETIF_MSG_TX_QUEUED, "SKB linearization failed - "
2625                            "silently dropping this SKB\n");
2626                         dev_kfree_skb_any(skb);
2627                         return NETDEV_TX_OK;
2628                 }
2629         }
2630 #endif
2631         /* Map skb linear data for DMA */
2632         mapping = dma_map_single(&bp->pdev->dev, skb->data,
2633                                  skb_headlen(skb), DMA_TO_DEVICE);
2634         if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
2635                 DP(NETIF_MSG_TX_QUEUED, "SKB mapping failed - "
2636                    "silently dropping this SKB\n");
2637                 dev_kfree_skb_any(skb);
2638                 return NETDEV_TX_OK;
2639         }
2640         /*
2641         Please read carefully. First we use one BD which we mark as start,
2642         then we have a parsing info BD (used for TSO or xsum),
2643         and only then we have the rest of the TSO BDs.
2644         (don't forget to mark the last one as last,
2645         and to unmap only AFTER you write to the BD ...)
2646         And above all, all pdb sizes are in words - NOT DWORDS!
2647         */
2648
2649         /* get current pkt produced now - advance it just before sending packet
2650          * since mapping of pages may fail and cause packet to be dropped
2651          */
2652         pkt_prod = txdata->tx_pkt_prod;
2653         bd_prod = TX_BD(txdata->tx_bd_prod);
2654
2655         /* get a tx_buf and first BD
2656          * tx_start_bd may be changed during SPLIT,
2657          * but first_bd will always stay first
2658          */
2659         tx_buf = &txdata->tx_buf_ring[TX_BD(pkt_prod)];
2660         tx_start_bd = &txdata->tx_desc_ring[bd_prod].start_bd;
2661         first_bd = tx_start_bd;
2662
2663         tx_start_bd->bd_flags.as_bitfield = ETH_TX_BD_FLAGS_START_BD;
2664         SET_FLAG(tx_start_bd->general_data, ETH_TX_START_BD_ETH_ADDR_TYPE,
2665                  mac_type);
2666
2667         /* header nbd */
2668         SET_FLAG(tx_start_bd->general_data, ETH_TX_START_BD_HDR_NBDS, 1);
2669
2670         /* remember the first BD of the packet */
2671         tx_buf->first_bd = txdata->tx_bd_prod;
2672         tx_buf->skb = skb;
2673         tx_buf->flags = 0;
2674
2675         DP(NETIF_MSG_TX_QUEUED,
2676            "sending pkt %u @%p  next_idx %u  bd %u @%p\n",
2677            pkt_prod, tx_buf, txdata->tx_pkt_prod, bd_prod, tx_start_bd);
2678
2679         if (vlan_tx_tag_present(skb)) {
2680                 tx_start_bd->vlan_or_ethertype =
2681                     cpu_to_le16(vlan_tx_tag_get(skb));
2682                 tx_start_bd->bd_flags.as_bitfield |=
2683                     (X_ETH_OUTBAND_VLAN << ETH_TX_BD_FLAGS_VLAN_MODE_SHIFT);
2684         } else
2685                 tx_start_bd->vlan_or_ethertype = cpu_to_le16(pkt_prod);
2686
2687         /* turn on parsing and get a BD */
2688         bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
2689
2690         if (xmit_type & XMIT_CSUM)
2691                 bnx2x_set_sbd_csum(bp, skb, tx_start_bd, xmit_type);
2692
2693         if (!CHIP_IS_E1x(bp)) {
2694                 pbd_e2 = &txdata->tx_desc_ring[bd_prod].parse_bd_e2;
2695                 memset(pbd_e2, 0, sizeof(struct eth_tx_parse_bd_e2));
2696                 /* Set PBD in checksum offload case */
2697                 if (xmit_type & XMIT_CSUM)
2698                         hlen = bnx2x_set_pbd_csum_e2(bp, skb,
2699                                                      &pbd_e2_parsing_data,
2700                                                      xmit_type);
2701                 if (IS_MF_SI(bp)) {
2702                         /*
2703                          * fill in the MAC addresses in the PBD - for local
2704                          * switching
2705                          */
2706                         bnx2x_set_fw_mac_addr(&pbd_e2->src_mac_addr_hi,
2707                                               &pbd_e2->src_mac_addr_mid,
2708                                               &pbd_e2->src_mac_addr_lo,
2709                                               eth->h_source);
2710                         bnx2x_set_fw_mac_addr(&pbd_e2->dst_mac_addr_hi,
2711                                               &pbd_e2->dst_mac_addr_mid,
2712                                               &pbd_e2->dst_mac_addr_lo,
2713                                               eth->h_dest);
2714                 }
2715         } else {
2716                 pbd_e1x = &txdata->tx_desc_ring[bd_prod].parse_bd_e1x;
2717                 memset(pbd_e1x, 0, sizeof(struct eth_tx_parse_bd_e1x));
2718                 /* Set PBD in checksum offload case */
2719                 if (xmit_type & XMIT_CSUM)
2720                         hlen = bnx2x_set_pbd_csum(bp, skb, pbd_e1x, xmit_type);
2721
2722         }
2723
2724         /* Setup the data pointer of the first BD of the packet */
2725         tx_start_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
2726         tx_start_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
2727         nbd = 2; /* start_bd + pbd + frags (updated when pages are mapped) */
2728         tx_start_bd->nbytes = cpu_to_le16(skb_headlen(skb));
2729         pkt_size = tx_start_bd->nbytes;
2730
2731         DP(NETIF_MSG_TX_QUEUED, "first bd @%p  addr (%x:%x)  nbd %d"
2732            "  nbytes %d  flags %x  vlan %x\n",
2733            tx_start_bd, tx_start_bd->addr_hi, tx_start_bd->addr_lo,
2734            le16_to_cpu(tx_start_bd->nbd), le16_to_cpu(tx_start_bd->nbytes),
2735            tx_start_bd->bd_flags.as_bitfield,
2736            le16_to_cpu(tx_start_bd->vlan_or_ethertype));
2737
2738         if (xmit_type & XMIT_GSO) {
2739
2740                 DP(NETIF_MSG_TX_QUEUED,
2741                    "TSO packet len %d  hlen %d  total len %d  tso size %d\n",
2742                    skb->len, hlen, skb_headlen(skb),
2743                    skb_shinfo(skb)->gso_size);
2744
2745                 tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_SW_LSO;
2746
2747                 if (unlikely(skb_headlen(skb) > hlen))
2748                         bd_prod = bnx2x_tx_split(bp, txdata, tx_buf,
2749                                                  &tx_start_bd, hlen,
2750                                                  bd_prod, ++nbd);
2751                 if (!CHIP_IS_E1x(bp))
2752                         bnx2x_set_pbd_gso_e2(skb, &pbd_e2_parsing_data,
2753                                              xmit_type);
2754                 else
2755                         bnx2x_set_pbd_gso(skb, pbd_e1x, xmit_type);
2756         }
2757
2758         /* Set the PBD's parsing_data field if not zero
2759          * (for the chips newer than 57711).
2760          */
2761         if (pbd_e2_parsing_data)
2762                 pbd_e2->parsing_data = cpu_to_le32(pbd_e2_parsing_data);
2763
2764         tx_data_bd = (struct eth_tx_bd *)tx_start_bd;
2765
2766         /* Handle fragmented skb */
2767         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2768                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2769
2770                 mapping = dma_map_page(&bp->pdev->dev, frag->page,
2771                                        frag->page_offset, frag->size,
2772                                        DMA_TO_DEVICE);
2773                 if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
2774
2775                         DP(NETIF_MSG_TX_QUEUED, "Unable to map page - "
2776                                                 "dropping packet...\n");
2777
2778                         /* we need unmap all buffers already mapped
2779                          * for this SKB;
2780                          * first_bd->nbd need to be properly updated
2781                          * before call to bnx2x_free_tx_pkt
2782                          */
2783                         first_bd->nbd = cpu_to_le16(nbd);
2784                         bnx2x_free_tx_pkt(bp, txdata,
2785                                           TX_BD(txdata->tx_pkt_prod));
2786                         return NETDEV_TX_OK;
2787                 }
2788
2789                 bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
2790                 tx_data_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
2791                 if (total_pkt_bd == NULL)
2792                         total_pkt_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
2793
2794                 tx_data_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
2795                 tx_data_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
2796                 tx_data_bd->nbytes = cpu_to_le16(frag->size);
2797                 le16_add_cpu(&pkt_size, frag->size);
2798                 nbd++;
2799
2800                 DP(NETIF_MSG_TX_QUEUED,
2801                    "frag %d  bd @%p  addr (%x:%x)  nbytes %d\n",
2802                    i, tx_data_bd, tx_data_bd->addr_hi, tx_data_bd->addr_lo,
2803                    le16_to_cpu(tx_data_bd->nbytes));
2804         }
2805
2806         DP(NETIF_MSG_TX_QUEUED, "last bd @%p\n", tx_data_bd);
2807
2808         /* update with actual num BDs */
2809         first_bd->nbd = cpu_to_le16(nbd);
2810
2811         bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
2812
2813         /* now send a tx doorbell, counting the next BD
2814          * if the packet contains or ends with it
2815          */
2816         if (TX_BD_POFF(bd_prod) < nbd)
2817                 nbd++;
2818
2819         /* total_pkt_bytes should be set on the first data BD if
2820          * it's not an LSO packet and there is more than one
2821          * data BD. In this case pkt_size is limited by an MTU value.
2822          * However we prefer to set it for an LSO packet (while we don't
2823          * have to) in order to save some CPU cycles in a none-LSO
2824          * case, when we much more care about them.
2825          */
2826         if (total_pkt_bd != NULL)
2827                 total_pkt_bd->total_pkt_bytes = pkt_size;
2828
2829         if (pbd_e1x)
2830                 DP(NETIF_MSG_TX_QUEUED,
2831                    "PBD (E1X) @%p  ip_data %x  ip_hlen %u  ip_id %u  lso_mss %u"
2832                    "  tcp_flags %x  xsum %x  seq %u  hlen %u\n",
2833                    pbd_e1x, pbd_e1x->global_data, pbd_e1x->ip_hlen_w,
2834                    pbd_e1x->ip_id, pbd_e1x->lso_mss, pbd_e1x->tcp_flags,
2835                    pbd_e1x->tcp_pseudo_csum, pbd_e1x->tcp_send_seq,
2836                     le16_to_cpu(pbd_e1x->total_hlen_w));
2837         if (pbd_e2)
2838                 DP(NETIF_MSG_TX_QUEUED,
2839                    "PBD (E2) @%p  dst %x %x %x src %x %x %x parsing_data %x\n",
2840                    pbd_e2, pbd_e2->dst_mac_addr_hi, pbd_e2->dst_mac_addr_mid,
2841                    pbd_e2->dst_mac_addr_lo, pbd_e2->src_mac_addr_hi,
2842                    pbd_e2->src_mac_addr_mid, pbd_e2->src_mac_addr_lo,
2843                    pbd_e2->parsing_data);
2844         DP(NETIF_MSG_TX_QUEUED, "doorbell: nbd %d  bd %u\n", nbd, bd_prod);
2845
2846         txdata->tx_pkt_prod++;
2847         /*
2848          * Make sure that the BD data is updated before updating the producer
2849          * since FW might read the BD right after the producer is updated.
2850          * This is only applicable for weak-ordered memory model archs such
2851          * as IA-64. The following barrier is also mandatory since FW will
2852          * assumes packets must have BDs.
2853          */
2854         wmb();
2855
2856         txdata->tx_db.data.prod += nbd;
2857         barrier();
2858
2859         DOORBELL(bp, txdata->cid, txdata->tx_db.raw);
2860
2861         mmiowb();
2862
2863         txdata->tx_bd_prod += nbd;
2864
2865         if (unlikely(bnx2x_tx_avail(bp, txdata) < MAX_SKB_FRAGS + 3)) {
2866                 netif_tx_stop_queue(txq);
2867
2868                 /* paired memory barrier is in bnx2x_tx_int(), we have to keep
2869                  * ordering of set_bit() in netif_tx_stop_queue() and read of
2870                  * fp->bd_tx_cons */
2871                 smp_mb();
2872
2873                 fp->eth_q_stats.driver_xoff++;
2874                 if (bnx2x_tx_avail(bp, txdata) >= MAX_SKB_FRAGS + 3)
2875                         netif_tx_wake_queue(txq);
2876         }
2877         txdata->tx_pkt++;
2878
2879         return NETDEV_TX_OK;
2880 }
2881
2882 /**
2883  * bnx2x_setup_tc - routine to configure net_device for multi tc
2884  *
2885  * @netdev: net device to configure
2886  * @tc: number of traffic classes to enable
2887  *
2888  * callback connected to the ndo_setup_tc function pointer
2889  */
2890 int bnx2x_setup_tc(struct net_device *dev, u8 num_tc)
2891 {
2892         int cos, prio, count, offset;
2893         struct bnx2x *bp = netdev_priv(dev);
2894
2895         /* setup tc must be called under rtnl lock */
2896         ASSERT_RTNL();
2897
2898         /* no traffic classes requested. aborting */
2899         if (!num_tc) {
2900                 netdev_reset_tc(dev);
2901                 return 0;
2902         }
2903
2904         /* requested to support too many traffic classes */
2905         if (num_tc > bp->max_cos) {
2906                 DP(NETIF_MSG_TX_ERR, "support for too many traffic classes"
2907                                      " requested: %d. max supported is %d",
2908                                      num_tc, bp->max_cos);
2909                 return -EINVAL;
2910         }
2911
2912         /* declare amount of supported traffic classes */
2913         if (netdev_set_num_tc(dev, num_tc)) {
2914                 DP(NETIF_MSG_TX_ERR, "failed to declare %d traffic classes",
2915                                      num_tc);
2916                 return -EINVAL;
2917         }
2918
2919         /* configure priority to traffic class mapping */
2920         for (prio = 0; prio < BNX2X_MAX_PRIORITY; prio++) {
2921                 netdev_set_prio_tc_map(dev, prio, bp->prio_to_cos[prio]);
2922                 DP(BNX2X_MSG_SP, "mapping priority %d to tc %d",
2923                    prio, bp->prio_to_cos[prio]);
2924         }
2925
2926
2927         /* Use this configuration to diffrentiate tc0 from other COSes
2928            This can be used for ets or pfc, and save the effort of setting
2929            up a multio class queue disc or negotiating DCBX with a switch
2930         netdev_set_prio_tc_map(dev, 0, 0);
2931         DP(BNX2X_MSG_SP, "mapping priority %d to tc %d", 0, 0);
2932         for (prio = 1; prio < 16; prio++) {
2933                 netdev_set_prio_tc_map(dev, prio, 1);
2934                 DP(BNX2X_MSG_SP, "mapping priority %d to tc %d", prio, 1);
2935         } */
2936
2937         /* configure traffic class to transmission queue mapping */
2938         for (cos = 0; cos < bp->max_cos; cos++) {
2939                 count = BNX2X_NUM_ETH_QUEUES(bp);
2940                 offset = cos * MAX_TXQS_PER_COS;
2941                 netdev_set_tc_queue(dev, cos, count, offset);
2942                 DP(BNX2X_MSG_SP, "mapping tc %d to offset %d count %d",
2943                    cos, offset, count);
2944         }
2945
2946         return 0;
2947 }
2948
2949 /* called with rtnl_lock */
2950 int bnx2x_change_mac_addr(struct net_device *dev, void *p)
2951 {
2952         struct sockaddr *addr = p;
2953         struct bnx2x *bp = netdev_priv(dev);
2954         int rc = 0;
2955
2956         if (!is_valid_ether_addr((u8 *)(addr->sa_data)))
2957                 return -EINVAL;
2958
2959         if (netif_running(dev))  {
2960                 rc = bnx2x_set_eth_mac(bp, false);
2961                 if (rc)
2962                         return rc;
2963         }
2964
2965         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
2966
2967         if (netif_running(dev))
2968                 rc = bnx2x_set_eth_mac(bp, true);
2969
2970         return rc;
2971 }
2972
2973 static void bnx2x_free_fp_mem_at(struct bnx2x *bp, int fp_index)
2974 {
2975         union host_hc_status_block *sb = &bnx2x_fp(bp, fp_index, status_blk);
2976         struct bnx2x_fastpath *fp = &bp->fp[fp_index];
2977         u8 cos;
2978
2979         /* Common */
2980 #ifdef BCM_CNIC
2981         if (IS_FCOE_IDX(fp_index)) {
2982                 memset(sb, 0, sizeof(union host_hc_status_block));
2983                 fp->status_blk_mapping = 0;
2984
2985         } else {
2986 #endif
2987                 /* status blocks */
2988                 if (!CHIP_IS_E1x(bp))
2989                         BNX2X_PCI_FREE(sb->e2_sb,
2990                                        bnx2x_fp(bp, fp_index,
2991                                                 status_blk_mapping),
2992                                        sizeof(struct host_hc_status_block_e2));
2993                 else
2994                         BNX2X_PCI_FREE(sb->e1x_sb,
2995                                        bnx2x_fp(bp, fp_index,
2996                                                 status_blk_mapping),
2997                                        sizeof(struct host_hc_status_block_e1x));
2998 #ifdef BCM_CNIC
2999         }
3000 #endif
3001         /* Rx */
3002         if (!skip_rx_queue(bp, fp_index)) {
3003                 bnx2x_free_rx_bds(fp);
3004
3005                 /* fastpath rx rings: rx_buf rx_desc rx_comp */
3006                 BNX2X_FREE(bnx2x_fp(bp, fp_index, rx_buf_ring));
3007                 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_desc_ring),
3008                                bnx2x_fp(bp, fp_index, rx_desc_mapping),
3009                                sizeof(struct eth_rx_bd) * NUM_RX_BD);
3010
3011                 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_comp_ring),
3012                                bnx2x_fp(bp, fp_index, rx_comp_mapping),
3013                                sizeof(struct eth_fast_path_rx_cqe) *
3014                                NUM_RCQ_BD);
3015
3016                 /* SGE ring */
3017                 BNX2X_FREE(bnx2x_fp(bp, fp_index, rx_page_ring));
3018                 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_sge_ring),
3019                                bnx2x_fp(bp, fp_index, rx_sge_mapping),
3020                                BCM_PAGE_SIZE * NUM_RX_SGE_PAGES);
3021         }
3022
3023         /* Tx */
3024         if (!skip_tx_queue(bp, fp_index)) {
3025                 /* fastpath tx rings: tx_buf tx_desc */
3026                 for_each_cos_in_tx_queue(fp, cos) {
3027                         struct bnx2x_fp_txdata *txdata = &fp->txdata[cos];
3028
3029                         DP(BNX2X_MSG_SP,
3030                            "freeing tx memory of fp %d cos %d cid %d",
3031                            fp_index, cos, txdata->cid);
3032
3033                         BNX2X_FREE(txdata->tx_buf_ring);
3034                         BNX2X_PCI_FREE(txdata->tx_desc_ring,
3035                                 txdata->tx_desc_mapping,
3036                                 sizeof(union eth_tx_bd_types) * NUM_TX_BD);
3037                 }
3038         }
3039         /* end of fastpath */
3040 }
3041
3042 void bnx2x_free_fp_mem(struct bnx2x *bp)
3043 {
3044         int i;
3045         for_each_queue(bp, i)
3046                 bnx2x_free_fp_mem_at(bp, i);
3047 }
3048
3049 static inline void set_sb_shortcuts(struct bnx2x *bp, int index)
3050 {
3051         union host_hc_status_block status_blk = bnx2x_fp(bp, index, status_blk);
3052         if (!CHIP_IS_E1x(bp)) {
3053                 bnx2x_fp(bp, index, sb_index_values) =
3054                         (__le16 *)status_blk.e2_sb->sb.index_values;
3055                 bnx2x_fp(bp, index, sb_running_index) =
3056                         (__le16 *)status_blk.e2_sb->sb.running_index;
3057         } else {
3058                 bnx2x_fp(bp, index, sb_index_values) =
3059                         (__le16 *)status_blk.e1x_sb->sb.index_values;
3060                 bnx2x_fp(bp, index, sb_running_index) =
3061                         (__le16 *)status_blk.e1x_sb->sb.running_index;
3062         }
3063 }
3064
3065 static int bnx2x_alloc_fp_mem_at(struct bnx2x *bp, int index)
3066 {
3067         union host_hc_status_block *sb;
3068         struct bnx2x_fastpath *fp = &bp->fp[index];
3069         int ring_size = 0;
3070         u8 cos;
3071
3072         /* if rx_ring_size specified - use it */
3073         int rx_ring_size = bp->rx_ring_size ? bp->rx_ring_size :
3074                            MAX_RX_AVAIL/BNX2X_NUM_RX_QUEUES(bp);
3075
3076         /* allocate at least number of buffers required by FW */
3077         rx_ring_size = max_t(int, bp->disable_tpa ? MIN_RX_SIZE_NONTPA :
3078                                                     MIN_RX_SIZE_TPA,
3079                                   rx_ring_size);
3080
3081         /* Common */
3082         sb = &bnx2x_fp(bp, index, status_blk);
3083 #ifdef BCM_CNIC
3084         if (!IS_FCOE_IDX(index)) {
3085 #endif
3086                 /* status blocks */
3087                 if (!CHIP_IS_E1x(bp))
3088                         BNX2X_PCI_ALLOC(sb->e2_sb,
3089                                 &bnx2x_fp(bp, index, status_blk_mapping),
3090                                 sizeof(struct host_hc_status_block_e2));
3091                 else
3092                         BNX2X_PCI_ALLOC(sb->e1x_sb,
3093                                 &bnx2x_fp(bp, index, status_blk_mapping),
3094                             sizeof(struct host_hc_status_block_e1x));
3095 #ifdef BCM_CNIC
3096         }
3097 #endif
3098
3099         /* FCoE Queue uses Default SB and doesn't ACK the SB, thus no need to
3100          * set shortcuts for it.
3101          */
3102         if (!IS_FCOE_IDX(index))
3103                 set_sb_shortcuts(bp, index);
3104
3105         /* Tx */
3106         if (!skip_tx_queue(bp, index)) {
3107                 /* fastpath tx rings: tx_buf tx_desc */
3108                 for_each_cos_in_tx_queue(fp, cos) {
3109                         struct bnx2x_fp_txdata *txdata = &fp->txdata[cos];
3110
3111                         DP(BNX2X_MSG_SP, "allocating tx memory of "
3112                                          "fp %d cos %d",
3113                            index, cos);
3114
3115                         BNX2X_ALLOC(txdata->tx_buf_ring,
3116                                 sizeof(struct sw_tx_bd) * NUM_TX_BD);
3117                         BNX2X_PCI_ALLOC(txdata->tx_desc_ring,
3118                                 &txdata->tx_desc_mapping,
3119                                 sizeof(union eth_tx_bd_types) * NUM_TX_BD);
3120                 }
3121         }
3122
3123         /* Rx */
3124         if (!skip_rx_queue(bp, index)) {
3125                 /* fastpath rx rings: rx_buf rx_desc rx_comp */
3126                 BNX2X_ALLOC(bnx2x_fp(bp, index, rx_buf_ring),
3127                                 sizeof(struct sw_rx_bd) * NUM_RX_BD);
3128                 BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_desc_ring),
3129                                 &bnx2x_fp(bp, index, rx_desc_mapping),
3130                                 sizeof(struct eth_rx_bd) * NUM_RX_BD);
3131
3132                 BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_comp_ring),
3133                                 &bnx2x_fp(bp, index, rx_comp_mapping),
3134                                 sizeof(struct eth_fast_path_rx_cqe) *
3135                                 NUM_RCQ_BD);
3136
3137                 /* SGE ring */
3138                 BNX2X_ALLOC(bnx2x_fp(bp, index, rx_page_ring),
3139                                 sizeof(struct sw_rx_page) * NUM_RX_SGE);
3140                 BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_sge_ring),
3141                                 &bnx2x_fp(bp, index, rx_sge_mapping),
3142                                 BCM_PAGE_SIZE * NUM_RX_SGE_PAGES);
3143                 /* RX BD ring */
3144                 bnx2x_set_next_page_rx_bd(fp);
3145
3146                 /* CQ ring */
3147                 bnx2x_set_next_page_rx_cq(fp);
3148
3149                 /* BDs */
3150                 ring_size = bnx2x_alloc_rx_bds(fp, rx_ring_size);
3151                 if (ring_size < rx_ring_size)
3152                         goto alloc_mem_err;
3153         }
3154
3155         return 0;
3156
3157 /* handles low memory cases */
3158 alloc_mem_err:
3159         BNX2X_ERR("Unable to allocate full memory for queue %d (size %d)\n",
3160                                                 index, ring_size);
3161         /* FW will drop all packets if queue is not big enough,
3162          * In these cases we disable the queue
3163          * Min size is different for OOO, TPA and non-TPA queues
3164          */
3165         if (ring_size < (fp->disable_tpa ?
3166                                 MIN_RX_SIZE_NONTPA : MIN_RX_SIZE_TPA)) {
3167                         /* release memory allocated for this queue */
3168                         bnx2x_free_fp_mem_at(bp, index);
3169                         return -ENOMEM;
3170         }
3171         return 0;
3172 }
3173
3174 int bnx2x_alloc_fp_mem(struct bnx2x *bp)
3175 {
3176         int i;
3177
3178         /**
3179          * 1. Allocate FP for leading - fatal if error
3180          * 2. {CNIC} Allocate FCoE FP - fatal if error
3181          * 3. {CNIC} Allocate OOO + FWD - disable OOO if error
3182          * 4. Allocate RSS - fix number of queues if error
3183          */
3184
3185         /* leading */
3186         if (bnx2x_alloc_fp_mem_at(bp, 0))
3187                 return -ENOMEM;
3188
3189 #ifdef BCM_CNIC
3190         if (!NO_FCOE(bp))
3191                 /* FCoE */
3192                 if (bnx2x_alloc_fp_mem_at(bp, FCOE_IDX))
3193                         /* we will fail load process instead of mark
3194                          * NO_FCOE_FLAG
3195                          */
3196                         return -ENOMEM;
3197 #endif
3198
3199         /* RSS */
3200         for_each_nondefault_eth_queue(bp, i)
3201                 if (bnx2x_alloc_fp_mem_at(bp, i))
3202                         break;
3203
3204         /* handle memory failures */
3205         if (i != BNX2X_NUM_ETH_QUEUES(bp)) {
3206                 int delta = BNX2X_NUM_ETH_QUEUES(bp) - i;
3207
3208                 WARN_ON(delta < 0);
3209 #ifdef BCM_CNIC
3210                 /**
3211                  * move non eth FPs next to last eth FP
3212                  * must be done in that order
3213                  * FCOE_IDX < FWD_IDX < OOO_IDX
3214                  */
3215
3216                 /* move FCoE fp even NO_FCOE_FLAG is on */
3217                 bnx2x_move_fp(bp, FCOE_IDX, FCOE_IDX - delta);
3218 #endif
3219                 bp->num_queues -= delta;
3220                 BNX2X_ERR("Adjusted num of queues from %d to %d\n",
3221                           bp->num_queues + delta, bp->num_queues);
3222         }
3223
3224         return 0;
3225 }
3226
3227 void bnx2x_free_mem_bp(struct bnx2x *bp)
3228 {
3229         kfree(bp->fp);
3230         kfree(bp->msix_table);
3231         kfree(bp->ilt);
3232 }
3233
3234 int __devinit bnx2x_alloc_mem_bp(struct bnx2x *bp)
3235 {
3236         struct bnx2x_fastpath *fp;
3237         struct msix_entry *tbl;
3238         struct bnx2x_ilt *ilt;
3239         int msix_table_size = 0;
3240
3241         /*
3242          * The biggest MSI-X table we might need is as a maximum number of fast
3243          * path IGU SBs plus default SB (for PF).
3244          */
3245         msix_table_size = bp->igu_sb_cnt + 1;
3246
3247         /* fp array: RSS plus CNIC related L2 queues */
3248         fp = kzalloc((BNX2X_MAX_RSS_COUNT(bp) + NON_ETH_CONTEXT_USE) *
3249                      sizeof(*fp), GFP_KERNEL);
3250         if (!fp)
3251                 goto alloc_err;
3252         bp->fp = fp;
3253
3254         /* msix table */
3255         tbl = kzalloc(msix_table_size * sizeof(*tbl), GFP_KERNEL);
3256         if (!tbl)
3257                 goto alloc_err;
3258         bp->msix_table = tbl;
3259
3260         /* ilt */
3261         ilt = kzalloc(sizeof(*ilt), GFP_KERNEL);
3262         if (!ilt)
3263                 goto alloc_err;
3264         bp->ilt = ilt;
3265
3266         return 0;
3267 alloc_err:
3268         bnx2x_free_mem_bp(bp);
3269         return -ENOMEM;
3270
3271 }
3272
3273 int bnx2x_reload_if_running(struct net_device *dev)
3274 {
3275         struct bnx2x *bp = netdev_priv(dev);
3276
3277         if (unlikely(!netif_running(dev)))
3278                 return 0;
3279
3280         bnx2x_nic_unload(bp, UNLOAD_NORMAL);
3281         return bnx2x_nic_load(bp, LOAD_NORMAL);
3282 }
3283
3284 int bnx2x_get_cur_phy_idx(struct bnx2x *bp)
3285 {
3286         u32 sel_phy_idx = 0;
3287         if (bp->link_params.num_phys <= 1)
3288                 return INT_PHY;
3289
3290         if (bp->link_vars.link_up) {
3291                 sel_phy_idx = EXT_PHY1;
3292                 /* In case link is SERDES, check if the EXT_PHY2 is the one */
3293                 if ((bp->link_vars.link_status & LINK_STATUS_SERDES_LINK) &&
3294                     (bp->link_params.phy[EXT_PHY2].supported & SUPPORTED_FIBRE))
3295                         sel_phy_idx = EXT_PHY2;
3296         } else {
3297
3298                 switch (bnx2x_phy_selection(&bp->link_params)) {
3299                 case PORT_HW_CFG_PHY_SELECTION_HARDWARE_DEFAULT:
3300                 case PORT_HW_CFG_PHY_SELECTION_FIRST_PHY:
3301                 case PORT_HW_CFG_PHY_SELECTION_FIRST_PHY_PRIORITY:
3302                        sel_phy_idx = EXT_PHY1;
3303                        break;
3304                 case PORT_HW_CFG_PHY_SELECTION_SECOND_PHY:
3305                 case PORT_HW_CFG_PHY_SELECTION_SECOND_PHY_PRIORITY:
3306                        sel_phy_idx = EXT_PHY2;
3307                        break;
3308                 }
3309         }
3310
3311         return sel_phy_idx;
3312
3313 }
3314 int bnx2x_get_link_cfg_idx(struct bnx2x *bp)
3315 {
3316         u32 sel_phy_idx = bnx2x_get_cur_phy_idx(bp);
3317         /*
3318          * The selected actived PHY is always after swapping (in case PHY
3319          * swapping is enabled). So when swapping is enabled, we need to reverse
3320          * the configuration
3321          */
3322
3323         if (bp->link_params.multi_phy_config &
3324             PORT_HW_CFG_PHY_SWAPPED_ENABLED) {
3325                 if (sel_phy_idx == EXT_PHY1)
3326                         sel_phy_idx = EXT_PHY2;
3327                 else if (sel_phy_idx == EXT_PHY2)
3328                         sel_phy_idx = EXT_PHY1;
3329         }
3330         return LINK_CONFIG_IDX(sel_phy_idx);
3331 }
3332
3333 #if defined(NETDEV_FCOE_WWNN) && defined(BCM_CNIC)
3334 int bnx2x_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
3335 {
3336         struct bnx2x *bp = netdev_priv(dev);
3337         struct cnic_eth_dev *cp = &bp->cnic_eth_dev;
3338
3339         switch (type) {
3340         case NETDEV_FCOE_WWNN:
3341                 *wwn = HILO_U64(cp->fcoe_wwn_node_name_hi,
3342                                 cp->fcoe_wwn_node_name_lo);
3343                 break;
3344         case NETDEV_FCOE_WWPN:
3345                 *wwn = HILO_U64(cp->fcoe_wwn_port_name_hi,
3346                                 cp->fcoe_wwn_port_name_lo);
3347                 break;
3348         default:
3349                 return -EINVAL;
3350         }
3351
3352         return 0;
3353 }
3354 #endif
3355
3356 /* called with rtnl_lock */
3357 int bnx2x_change_mtu(struct net_device *dev, int new_mtu)
3358 {
3359         struct bnx2x *bp = netdev_priv(dev);
3360
3361         if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
3362                 printk(KERN_ERR "Handling parity error recovery. Try again later\n");
3363                 return -EAGAIN;
3364         }
3365
3366         if ((new_mtu > ETH_MAX_JUMBO_PACKET_SIZE) ||
3367             ((new_mtu + ETH_HLEN) < ETH_MIN_PACKET_SIZE))
3368                 return -EINVAL;
3369
3370         /* This does not race with packet allocation
3371          * because the actual alloc size is
3372          * only updated as part of load
3373          */
3374         dev->mtu = new_mtu;
3375
3376         return bnx2x_reload_if_running(dev);
3377 }
3378
3379 u32 bnx2x_fix_features(struct net_device *dev, u32 features)
3380 {
3381         struct bnx2x *bp = netdev_priv(dev);
3382
3383         /* TPA requires Rx CSUM offloading */
3384         if (!(features & NETIF_F_RXCSUM) || bp->disable_tpa)
3385                 features &= ~NETIF_F_LRO;
3386
3387         return features;
3388 }
3389
3390 int bnx2x_set_features(struct net_device *dev, u32 features)
3391 {
3392         struct bnx2x *bp = netdev_priv(dev);
3393         u32 flags = bp->flags;
3394         bool bnx2x_reload = false;
3395
3396         if (features & NETIF_F_LRO)
3397                 flags |= TPA_ENABLE_FLAG;
3398         else
3399                 flags &= ~TPA_ENABLE_FLAG;
3400
3401         if (features & NETIF_F_LOOPBACK) {
3402                 if (bp->link_params.loopback_mode != LOOPBACK_BMAC) {
3403                         bp->link_params.loopback_mode = LOOPBACK_BMAC;
3404                         bnx2x_reload = true;
3405                 }
3406         } else {
3407                 if (bp->link_params.loopback_mode != LOOPBACK_NONE) {
3408                         bp->link_params.loopback_mode = LOOPBACK_NONE;
3409                         bnx2x_reload = true;
3410                 }
3411         }
3412
3413         if (flags ^ bp->flags) {
3414                 bp->flags = flags;
3415                 bnx2x_reload = true;
3416         }
3417
3418         if (bnx2x_reload) {
3419                 if (bp->recovery_state == BNX2X_RECOVERY_DONE)
3420                         return bnx2x_reload_if_running(dev);
3421                 /* else: bnx2x_nic_load() will be called at end of recovery */
3422         }
3423
3424         return 0;
3425 }
3426
3427 void bnx2x_tx_timeout(struct net_device *dev)
3428 {
3429         struct bnx2x *bp = netdev_priv(dev);
3430
3431 #ifdef BNX2X_STOP_ON_ERROR
3432         if (!bp->panic)
3433                 bnx2x_panic();
3434 #endif
3435
3436         smp_mb__before_clear_bit();
3437         set_bit(BNX2X_SP_RTNL_TX_TIMEOUT, &bp->sp_rtnl_state);
3438         smp_mb__after_clear_bit();
3439
3440         /* This allows the netif to be shutdown gracefully before resetting */
3441         schedule_delayed_work(&bp->sp_rtnl_task, 0);
3442 }
3443
3444 int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
3445 {
3446         struct net_device *dev = pci_get_drvdata(pdev);
3447         struct bnx2x *bp;
3448
3449         if (!dev) {
3450                 dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n");
3451                 return -ENODEV;
3452         }
3453         bp = netdev_priv(dev);
3454
3455         rtnl_lock();
3456
3457         pci_save_state(pdev);
3458
3459         if (!netif_running(dev)) {
3460                 rtnl_unlock();
3461                 return 0;
3462         }
3463
3464         netif_device_detach(dev);
3465
3466         bnx2x_nic_unload(bp, UNLOAD_CLOSE);
3467
3468         bnx2x_set_power_state(bp, pci_choose_state(pdev, state));
3469
3470         rtnl_unlock();
3471
3472         return 0;
3473 }
3474
3475 int bnx2x_resume(struct pci_dev *pdev)
3476 {
3477         struct net_device *dev = pci_get_drvdata(pdev);
3478         struct bnx2x *bp;
3479         int rc;
3480
3481         if (!dev) {
3482                 dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n");
3483                 return -ENODEV;
3484         }
3485         bp = netdev_priv(dev);
3486
3487         if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
3488                 printk(KERN_ERR "Handling parity error recovery. Try again later\n");
3489                 return -EAGAIN;
3490         }
3491
3492         rtnl_lock();
3493
3494         pci_restore_state(pdev);
3495
3496         if (!netif_running(dev)) {
3497                 rtnl_unlock();
3498                 return 0;
3499         }
3500
3501         bnx2x_set_power_state(bp, PCI_D0);
3502         netif_device_attach(dev);
3503
3504         /* Since the chip was reset, clear the FW sequence number */
3505         bp->fw_seq = 0;
3506         rc = bnx2x_nic_load(bp, LOAD_OPEN);
3507
3508         rtnl_unlock();
3509
3510         return rc;
3511 }
3512
3513
3514 void bnx2x_set_ctx_validation(struct bnx2x *bp, struct eth_context *cxt,
3515                               u32 cid)
3516 {
3517         /* ustorm cxt validation */
3518         cxt->ustorm_ag_context.cdu_usage =
3519                 CDU_RSRVD_VALUE_TYPE_A(HW_CID(bp, cid),
3520                         CDU_REGION_NUMBER_UCM_AG, ETH_CONNECTION_TYPE);
3521         /* xcontext validation */
3522         cxt->xstorm_ag_context.cdu_reserved =
3523                 CDU_RSRVD_VALUE_TYPE_A(HW_CID(bp, cid),
3524                         CDU_REGION_NUMBER_XCM_AG, ETH_CONNECTION_TYPE);
3525 }
3526
3527 static inline void storm_memset_hc_timeout(struct bnx2x *bp, u8 port,
3528                                              u8 fw_sb_id, u8 sb_index,
3529                                              u8 ticks)
3530 {
3531
3532         u32 addr = BAR_CSTRORM_INTMEM +
3533                    CSTORM_STATUS_BLOCK_DATA_TIMEOUT_OFFSET(fw_sb_id, sb_index);
3534         REG_WR8(bp, addr, ticks);
3535         DP(NETIF_MSG_HW, "port %x fw_sb_id %d sb_index %d ticks %d\n",
3536                           port, fw_sb_id, sb_index, ticks);
3537 }
3538
3539 static inline void storm_memset_hc_disable(struct bnx2x *bp, u8 port,
3540                                              u16 fw_sb_id, u8 sb_index,
3541                                              u8 disable)
3542 {
3543         u32 enable_flag = disable ? 0 : (1 << HC_INDEX_DATA_HC_ENABLED_SHIFT);
3544         u32 addr = BAR_CSTRORM_INTMEM +
3545                    CSTORM_STATUS_BLOCK_DATA_FLAGS_OFFSET(fw_sb_id, sb_index);
3546         u16 flags = REG_RD16(bp, addr);
3547         /* clear and set */
3548         flags &= ~HC_INDEX_DATA_HC_ENABLED;
3549         flags |= enable_flag;
3550         REG_WR16(bp, addr, flags);
3551         DP(NETIF_MSG_HW, "port %x fw_sb_id %d sb_index %d disable %d\n",
3552                           port, fw_sb_id, sb_index, disable);
3553 }
3554
3555 void bnx2x_update_coalesce_sb_index(struct bnx2x *bp, u8 fw_sb_id,
3556                                     u8 sb_index, u8 disable, u16 usec)
3557 {
3558         int port = BP_PORT(bp);
3559         u8 ticks = usec / BNX2X_BTR;
3560
3561         storm_memset_hc_timeout(bp, port, fw_sb_id, sb_index, ticks);
3562
3563         disable = disable ? 1 : (usec ? 0 : 1);
3564         storm_memset_hc_disable(bp, port, fw_sb_id, sb_index, disable);
3565 }