drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

   1 /* bnx2x_cmn.c: Broadcom Everest network driver.
   2  *
   3  * Copyright (c) 2007-2012 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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  19
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_vlan.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/ip.h>
  24 #include <net/ipv6.h>
  25 #include <net/ip6_checksum.h>
  26 #include <linux/firmware.h>
  27 #include <linux/prefetch.h>
  28 #include "bnx2x_cmn.h"
  29 #include "bnx2x_init.h"
  30 #include "bnx2x_sp.h"
  31
  32
  33
  34 /**
  35  * bnx2x_move_fp - move content of the fastpath structure.
  36  *
  37  * @bp:         driver handle
  38  * @from:       source FP index
  39  * @to:         destination FP index
  40  *
  41  * Makes sure the contents of the bp->fp[to].napi is kept
  42  * intact. This is done by first copying the napi struct from
  43  * the target to the source, and then mem copying the entire
  44  * source onto the target
  45  */
  46 static inline void bnx2x_move_fp(struct bnx2x *bp, int from, int to)
  47 {
  48         struct bnx2x_fastpath *from_fp = &bp->fp[from];
  49         struct bnx2x_fastpath *to_fp = &bp->fp[to];
  50
  51         /* Copy the NAPI object as it has been already initialized */
  52         from_fp->napi = to_fp->napi;
  53
  54         /* Move bnx2x_fastpath contents */
  55         memcpy(to_fp, from_fp, sizeof(*to_fp));
  56         to_fp->index = to;
  57 }
  58
  59 int load_count[2][3] = { {0} }; /* per-path: 0-common, 1-port0, 2-port1 */
  60
  61 /* free skb in the packet ring at pos idx
  62  * return idx of last bd freed
  63  */
  64 static u16 bnx2x_free_tx_pkt(struct bnx2x *bp, struct bnx2x_fp_txdata *txdata,
  65                              u16 idx, unsigned int *pkts_compl,
  66                              unsigned int *bytes_compl)
  67 {
  68         struct sw_tx_bd *tx_buf = &txdata->tx_buf_ring[idx];
  69         struct eth_tx_start_bd *tx_start_bd;
  70         struct eth_tx_bd *tx_data_bd;
  71         struct sk_buff *skb = tx_buf->skb;
  72         u16 bd_idx = TX_BD(tx_buf->first_bd), new_cons;
  73         int nbd;
  74
  75         /* prefetch skb end pointer to speedup dev_kfree_skb() */
  76         prefetch(&skb->end);
  77
  78         DP(NETIF_MSG_TX_DONE, "fp[%d]: pkt_idx %d  buff @(%p)->skb %p\n",
  79            txdata->txq_index, idx, tx_buf, skb);
  80
  81         /* unmap first bd */
  82         tx_start_bd = &txdata->tx_desc_ring[bd_idx].start_bd;
  83         dma_unmap_single(&bp->pdev->dev, BD_UNMAP_ADDR(tx_start_bd),
  84                          BD_UNMAP_LEN(tx_start_bd), DMA_TO_DEVICE);
  85
  86
  87         nbd = le16_to_cpu(tx_start_bd->nbd) - 1;
  88 #ifdef BNX2X_STOP_ON_ERROR
  89         if ((nbd - 1) > (MAX_SKB_FRAGS + 2)) {
  90                 BNX2X_ERR("BAD nbd!\n");
  91                 bnx2x_panic();
  92         }
  93 #endif
  94         new_cons = nbd + tx_buf->first_bd;
  95
  96         /* Get the next bd */
  97         bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
  98
  99         /* Skip a parse bd... */
 100         --nbd;
 101         bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
 102
 103         /* ...and the TSO split header bd since they have no mapping */
 104         if (tx_buf->flags & BNX2X_TSO_SPLIT_BD) {
 105                 --nbd;
 106                 bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
 107         }
 108
 109         /* now free frags */
 110         while (nbd > 0) {
 111
 112                 tx_data_bd = &txdata->tx_desc_ring[bd_idx].reg_bd;
 113                 dma_unmap_page(&bp->pdev->dev, BD_UNMAP_ADDR(tx_data_bd),
 114                                BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE);
 115                 if (--nbd)
 116                         bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
 117         }
 118
 119         /* release skb */
 120         WARN_ON(!skb);
 121         if (likely(skb)) {
 122                 (*pkts_compl)++;
 123                 (*bytes_compl) += skb->len;
 124         }
 125
 126         dev_kfree_skb_any(skb);
 127         tx_buf->first_bd = 0;
 128         tx_buf->skb = NULL;
 129
 130         return new_cons;
 131 }
 132
 133 int bnx2x_tx_int(struct bnx2x *bp, struct bnx2x_fp_txdata *txdata)
 134 {
 135         struct netdev_queue *txq;
 136         u16 hw_cons, sw_cons, bd_cons = txdata->tx_bd_cons;
 137         unsigned int pkts_compl = 0, bytes_compl = 0;
 138
 139 #ifdef BNX2X_STOP_ON_ERROR
 140         if (unlikely(bp->panic))
 141                 return -1;
 142 #endif
 143
 144         txq = netdev_get_tx_queue(bp->dev, txdata->txq_index);
 145         hw_cons = le16_to_cpu(*txdata->tx_cons_sb);
 146         sw_cons = txdata->tx_pkt_cons;
 147
 148         while (sw_cons != hw_cons) {
 149                 u16 pkt_cons;
 150
 151                 pkt_cons = TX_BD(sw_cons);
 152
 153                 DP(NETIF_MSG_TX_DONE,
 154                    "queue[%d]: hw_cons %u  sw_cons %u  pkt_cons %u\n",
 155                    txdata->txq_index, hw_cons, sw_cons, pkt_cons);
 156
 157                 bd_cons = bnx2x_free_tx_pkt(bp, txdata, pkt_cons,
 158                     &pkts_compl, &bytes_compl);
 159
 160                 sw_cons++;
 161         }
 162
 163         netdev_tx_completed_queue(txq, pkts_compl, bytes_compl);
 164
 165         txdata->tx_pkt_cons = sw_cons;
 166         txdata->tx_bd_cons = bd_cons;
 167
 168         /* Need to make the tx_bd_cons update visible to start_xmit()
 169          * before checking for netif_tx_queue_stopped().  Without the
 170          * memory barrier, there is a small possibility that
 171          * start_xmit() will miss it and cause the queue to be stopped
 172          * forever.
 173          * On the other hand we need an rmb() here to ensure the proper
 174          * ordering of bit testing in the following
 175          * netif_tx_queue_stopped(txq) call.
 176          */
 177         smp_mb();
 178
 179         if (unlikely(netif_tx_queue_stopped(txq))) {
 180                 /* Taking tx_lock() is needed to prevent reenabling the queue
 181                  * while it's empty. This could have happen if rx_action() gets
 182                  * suspended in bnx2x_tx_int() after the condition before
 183                  * netif_tx_wake_queue(), while tx_action (bnx2x_start_xmit()):
 184                  *
 185                  * stops the queue->sees fresh tx_bd_cons->releases the queue->
 186                  * sends some packets consuming the whole queue again->
 187                  * stops the queue
 188                  */
 189
 190                 __netif_tx_lock(txq, smp_processor_id());
 191
 192                 if ((netif_tx_queue_stopped(txq)) &&
 193                     (bp->state == BNX2X_STATE_OPEN) &&
 194                     (bnx2x_tx_avail(bp, txdata) >= MAX_SKB_FRAGS + 3))
 195                         netif_tx_wake_queue(txq);
 196
 197                 __netif_tx_unlock(txq);
 198         }
 199         return 0;
 200 }
 201
 202 static inline void bnx2x_update_last_max_sge(struct bnx2x_fastpath *fp,
 203                                              u16 idx)
 204 {
 205         u16 last_max = fp->last_max_sge;
 206
 207         if (SUB_S16(idx, last_max) > 0)
 208                 fp->last_max_sge = idx;
 209 }
 210
 211 static inline void bnx2x_update_sge_prod(struct bnx2x_fastpath *fp,
 212                                          u16 sge_len,
 213                                          struct eth_end_agg_rx_cqe *cqe)
 214 {
 215         struct bnx2x *bp = fp->bp;
 216         u16 last_max, last_elem, first_elem;
 217         u16 delta = 0;
 218         u16 i;
 219
 220         if (!sge_len)
 221                 return;
 222
 223         /* First mark all used pages */
 224         for (i = 0; i < sge_len; i++)
 225                 BIT_VEC64_CLEAR_BIT(fp->sge_mask,
 226                         RX_SGE(le16_to_cpu(cqe->sgl_or_raw_data.sgl[i])));
 227
 228         DP(NETIF_MSG_RX_STATUS, "fp_cqe->sgl[%d] = %d\n",
 229            sge_len - 1, le16_to_cpu(cqe->sgl_or_raw_data.sgl[sge_len - 1]));
 230
 231         /* Here we assume that the last SGE index is the biggest */
 232         prefetch((void *)(fp->sge_mask));
 233         bnx2x_update_last_max_sge(fp,
 234                 le16_to_cpu(cqe->sgl_or_raw_data.sgl[sge_len - 1]));
 235
 236         last_max = RX_SGE(fp->last_max_sge);
 237         last_elem = last_max >> BIT_VEC64_ELEM_SHIFT;
 238         first_elem = RX_SGE(fp->rx_sge_prod) >> BIT_VEC64_ELEM_SHIFT;
 239
 240         /* If ring is not full */
 241         if (last_elem + 1 != first_elem)
 242                 last_elem++;
 243
 244         /* Now update the prod */
 245         for (i = first_elem; i != last_elem; i = NEXT_SGE_MASK_ELEM(i)) {
 246                 if (likely(fp->sge_mask[i]))
 247                         break;
 248
 249                 fp->sge_mask[i] = BIT_VEC64_ELEM_ONE_MASK;
 250                 delta += BIT_VEC64_ELEM_SZ;
 251         }
 252
 253         if (delta > 0) {
 254                 fp->rx_sge_prod += delta;
 255                 /* clear page-end entries */
 256                 bnx2x_clear_sge_mask_next_elems(fp);
 257         }
 258
 259         DP(NETIF_MSG_RX_STATUS,
 260            "fp->last_max_sge = %d  fp->rx_sge_prod = %d\n",
 261            fp->last_max_sge, fp->rx_sge_prod);
 262 }
 263
 264 /* Set Toeplitz hash value in the skb using the value from the
 265  * CQE (calculated by HW).
 266  */
 267 static u32 bnx2x_get_rxhash(const struct bnx2x *bp,
 268                             const struct eth_fast_path_rx_cqe *cqe)
 269 {
 270         /* Set Toeplitz hash from CQE */
 271         if ((bp->dev->features & NETIF_F_RXHASH) &&
 272             (cqe->status_flags & ETH_FAST_PATH_RX_CQE_RSS_HASH_FLG))
 273                 return le32_to_cpu(cqe->rss_hash_result);
 274         return 0;
 275 }
 276
 277 static void bnx2x_tpa_start(struct bnx2x_fastpath *fp, u16 queue,
 278                             u16 cons, u16 prod,
 279                             struct eth_fast_path_rx_cqe *cqe)
 280 {
 281         struct bnx2x *bp = fp->bp;
 282         struct sw_rx_bd *cons_rx_buf = &fp->rx_buf_ring[cons];
 283         struct sw_rx_bd *prod_rx_buf = &fp->rx_buf_ring[prod];
 284         struct eth_rx_bd *prod_bd = &fp->rx_desc_ring[prod];
 285         dma_addr_t mapping;
 286         struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
 287         struct sw_rx_bd *first_buf = &tpa_info->first_buf;
 288
 289         /* print error if current state != stop */
 290         if (tpa_info->tpa_state != BNX2X_TPA_STOP)
 291                 BNX2X_ERR("start of bin not in stop [%d]\n", queue);
 292
 293         /* Try to map an empty data buffer from the aggregation info  */
 294         mapping = dma_map_single(&bp->pdev->dev,
 295                                  first_buf->data + NET_SKB_PAD,
 296                                  fp->rx_buf_size, DMA_FROM_DEVICE);
 297         /*
 298          *  ...if it fails - move the skb from the consumer to the producer
 299          *  and set the current aggregation state as ERROR to drop it
 300          *  when TPA_STOP arrives.
 301          */
 302
 303         if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
 304                 /* Move the BD from the consumer to the producer */
 305                 bnx2x_reuse_rx_data(fp, cons, prod);
 306                 tpa_info->tpa_state = BNX2X_TPA_ERROR;
 307                 return;
 308         }
 309
 310         /* move empty data from pool to prod */
 311         prod_rx_buf->data = first_buf->data;
 312         dma_unmap_addr_set(prod_rx_buf, mapping, mapping);
 313         /* point prod_bd to new data */
 314         prod_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
 315         prod_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
 316
 317         /* move partial skb from cons to pool (don't unmap yet) */
 318         *first_buf = *cons_rx_buf;
 319
 320         /* mark bin state as START */
 321         tpa_info->parsing_flags =
 322                 le16_to_cpu(cqe->pars_flags.flags);
 323         tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag);
 324         tpa_info->tpa_state = BNX2X_TPA_START;
 325         tpa_info->len_on_bd = le16_to_cpu(cqe->len_on_bd);
 326         tpa_info->placement_offset = cqe->placement_offset;
 327         tpa_info->rxhash = bnx2x_get_rxhash(bp, cqe);
 328         if (fp->mode == TPA_MODE_GRO) {
 329                 u16 gro_size = le16_to_cpu(cqe->pkt_len_or_gro_seg_len);
 330                 tpa_info->full_page =
 331                         SGE_PAGE_SIZE * PAGES_PER_SGE / gro_size * gro_size;
 332                 /*
 333                  * FW 7.2.16 BUG workaround:
 334                  * if SGE size is (exactly) multiple gro_size
 335                  * fw will place one less frag on SGE.
 336                  * the calculation is done only for potentially
 337                  * dangerous MTUs.
 338                  */
 339                 if (unlikely(bp->gro_check))
 340                         if (!(SGE_PAGE_SIZE * PAGES_PER_SGE % gro_size))
 341                                 tpa_info->full_page -= gro_size;
 342                 tpa_info->gro_size = gro_size;
 343         }
 344
 345 #ifdef BNX2X_STOP_ON_ERROR
 346         fp->tpa_queue_used |= (1 << queue);
 347 #ifdef _ASM_GENERIC_INT_L64_H
 348         DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%lx\n",
 349 #else
 350         DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%llx\n",
 351 #endif
 352            fp->tpa_queue_used);
 353 #endif
 354 }
 355
 356 /* Timestamp option length allowed for TPA aggregation:
 357  *
 358  *              nop nop kind length echo val
 359  */
 360 #define TPA_TSTAMP_OPT_LEN      12
 361 /**
 362  * bnx2x_set_lro_mss - calculate the approximate value of the MSS
 363  *
 364  * @bp:                 driver handle
 365  * @parsing_flags:      parsing flags from the START CQE
 366  * @len_on_bd:          total length of the first packet for the
 367  *                      aggregation.
 368  *
 369  * Approximate value of the MSS for this aggregation calculated using
 370  * the first packet of it.
 371  */
 372 static inline u16 bnx2x_set_lro_mss(struct bnx2x *bp, u16 parsing_flags,
 373                                     u16 len_on_bd)
 374 {
 375         /*
 376          * TPA arrgregation won't have either IP options or TCP options
 377          * other than timestamp or IPv6 extension headers.
 378          */
 379         u16 hdrs_len = ETH_HLEN + sizeof(struct tcphdr);
 380
 381         if (GET_FLAG(parsing_flags, PARSING_FLAGS_OVER_ETHERNET_PROTOCOL) ==
 382             PRS_FLAG_OVERETH_IPV6)
 383                 hdrs_len += sizeof(struct ipv6hdr);
 384         else /* IPv4 */
 385                 hdrs_len += sizeof(struct iphdr);
 386
 387
 388         /* Check if there was a TCP timestamp, if there is it's will
 389          * always be 12 bytes length: nop nop kind length echo val.
 390          *
 391          * Otherwise FW would close the aggregation.
 392          */
 393         if (parsing_flags & PARSING_FLAGS_TIME_STAMP_EXIST_FLAG)
 394                 hdrs_len += TPA_TSTAMP_OPT_LEN;
 395
 396         return len_on_bd - hdrs_len;
 397 }
 398
 399 static int bnx2x_fill_frag_skb(struct bnx2x *bp, struct bnx2x_fastpath *fp,
 400                                struct bnx2x_agg_info *tpa_info,
 401                                u16 pages,
 402                                struct sk_buff *skb,
 403                                struct eth_end_agg_rx_cqe *cqe,
 404                                u16 cqe_idx)
 405 {
 406         struct sw_rx_page *rx_pg, old_rx_pg;
 407         u32 i, frag_len, frag_size;
 408         int err, j, frag_id = 0;
 409         u16 len_on_bd = tpa_info->len_on_bd;
 410         u16 full_page = 0, gro_size = 0;
 411
 412         frag_size = le16_to_cpu(cqe->pkt_len) - len_on_bd;
 413
 414         if (fp->mode == TPA_MODE_GRO) {
 415                 gro_size = tpa_info->gro_size;
 416                 full_page = tpa_info->full_page;
 417         }
 418
 419         /* This is needed in order to enable forwarding support */
 420         if (frag_size) {
 421                 skb_shinfo(skb)->gso_size = bnx2x_set_lro_mss(bp,
 422                                         tpa_info->parsing_flags, len_on_bd);
 423
 424                 /* set for GRO */
 425                 if (fp->mode == TPA_MODE_GRO)
 426                         skb_shinfo(skb)->gso_type =
 427                             (GET_FLAG(tpa_info->parsing_flags,
 428                                       PARSING_FLAGS_OVER_ETHERNET_PROTOCOL) ==
 429                                                 PRS_FLAG_OVERETH_IPV6) ?
 430                                 SKB_GSO_TCPV6 : SKB_GSO_TCPV4;
 431         }
 432
 433
 434 #ifdef BNX2X_STOP_ON_ERROR
 435         if (pages > min_t(u32, 8, MAX_SKB_FRAGS)*SGE_PAGE_SIZE*PAGES_PER_SGE) {
 436                 BNX2X_ERR("SGL length is too long: %d. CQE index is %d\n",
 437                           pages, cqe_idx);
 438                 BNX2X_ERR("cqe->pkt_len = %d\n", cqe->pkt_len);
 439                 bnx2x_panic();
 440                 return -EINVAL;
 441         }
 442 #endif
 443
 444         /* Run through the SGL and compose the fragmented skb */
 445         for (i = 0, j = 0; i < pages; i += PAGES_PER_SGE, j++) {
 446                 u16 sge_idx = RX_SGE(le16_to_cpu(cqe->sgl_or_raw_data.sgl[j]));
 447
 448                 /* FW gives the indices of the SGE as if the ring is an array
 449                    (meaning that "next" element will consume 2 indices) */
 450                 if (fp->mode == TPA_MODE_GRO)
 451                         frag_len = min_t(u32, frag_size, (u32)full_page);
 452                 else /* LRO */
 453                         frag_len = min_t(u32, frag_size,
 454                                          (u32)(SGE_PAGE_SIZE * PAGES_PER_SGE));
 455
 456                 rx_pg = &fp->rx_page_ring[sge_idx];
 457                 old_rx_pg = *rx_pg;
 458
 459                 /* If we fail to allocate a substitute page, we simply stop
 460                    where we are and drop the whole packet */
 461                 err = bnx2x_alloc_rx_sge(bp, fp, sge_idx);
 462                 if (unlikely(err)) {
 463                         fp->eth_q_stats.rx_skb_alloc_failed++;
 464                         return err;
 465                 }
 466
 467                 /* Unmap the page as we r going to pass it to the stack */
 468                 dma_unmap_page(&bp->pdev->dev,
 469                                dma_unmap_addr(&old_rx_pg, mapping),
 470                                SGE_PAGE_SIZE*PAGES_PER_SGE, DMA_FROM_DEVICE);
 471                 /* Add one frag and update the appropriate fields in the skb */
 472                 if (fp->mode == TPA_MODE_LRO)
 473                         skb_fill_page_desc(skb, j, old_rx_pg.page, 0, frag_len);
 474                 else { /* GRO */
 475                         int rem;
 476                         int offset = 0;
 477                         for (rem = frag_len; rem > 0; rem -= gro_size) {
 478                                 int len = rem > gro_size ? gro_size : rem;
 479                                 skb_fill_page_desc(skb, frag_id++,
 480                                                    old_rx_pg.page, offset, len);
 481                                 if (offset)
 482                                         get_page(old_rx_pg.page);
 483                                 offset += len;
 484                         }
 485                 }
 486
 487                 skb->data_len += frag_len;
 488                 skb->truesize += SGE_PAGE_SIZE * PAGES_PER_SGE;
 489                 skb->len += frag_len;
 490
 491                 frag_size -= frag_len;
 492         }
 493
 494         return 0;
 495 }
 496
 497 static inline void bnx2x_tpa_stop(struct bnx2x *bp, struct bnx2x_fastpath *fp,
 498                                   struct bnx2x_agg_info *tpa_info,
 499                                   u16 pages,
 500                                   struct eth_end_agg_rx_cqe *cqe,
 501                                   u16 cqe_idx)
 502 {
 503         struct sw_rx_bd *rx_buf = &tpa_info->first_buf;
 504         u8 pad = tpa_info->placement_offset;
 505         u16 len = tpa_info->len_on_bd;
 506         struct sk_buff *skb = NULL;
 507         u8 *new_data, *data = rx_buf->data;
 508         u8 old_tpa_state = tpa_info->tpa_state;
 509
 510         tpa_info->tpa_state = BNX2X_TPA_STOP;
 511
 512         /* If we there was an error during the handling of the TPA_START -
 513          * drop this aggregation.
 514          */
 515         if (old_tpa_state == BNX2X_TPA_ERROR)
 516                 goto drop;
 517
 518         /* Try to allocate the new data */
 519         new_data = kmalloc(fp->rx_buf_size + NET_SKB_PAD, GFP_ATOMIC);
 520
 521         /* Unmap skb in the pool anyway, as we are going to change
 522            pool entry status to BNX2X_TPA_STOP even if new skb allocation
 523            fails. */
 524         dma_unmap_single(&bp->pdev->dev, dma_unmap_addr(rx_buf, mapping),
 525                          fp->rx_buf_size, DMA_FROM_DEVICE);
 526         if (likely(new_data))
 527                 skb = build_skb(data);
 528
 529         if (likely(skb)) {
 530 #ifdef BNX2X_STOP_ON_ERROR
 531                 if (pad + len > fp->rx_buf_size) {
 532                         BNX2X_ERR("skb_put is about to fail...  pad %d  len %d  rx_buf_size %d\n",
 533                                   pad, len, fp->rx_buf_size);
 534                         bnx2x_panic();
 535                         return;
 536                 }
 537 #endif
 538
 539                 skb_reserve(skb, pad + NET_SKB_PAD);
 540                 skb_put(skb, len);
 541                 skb->rxhash = tpa_info->rxhash;
 542
 543                 skb->protocol = eth_type_trans(skb, bp->dev);
 544                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 545
 546                 if (!bnx2x_fill_frag_skb(bp, fp, tpa_info, pages,
 547                                          skb, cqe, cqe_idx)) {
 548                         if (tpa_info->parsing_flags & PARSING_FLAGS_VLAN)
 549                                 __vlan_hwaccel_put_tag(skb, tpa_info->vlan_tag);
 550                         napi_gro_receive(&fp->napi, skb);
 551                 } else {
 552                         DP(NETIF_MSG_RX_STATUS,
 553                            "Failed to allocate new pages - dropping packet!\n");
 554                         dev_kfree_skb_any(skb);
 555                 }
 556
 557
 558                 /* put new data in bin */
 559                 rx_buf->data = new_data;
 560
 561                 return;
 562         }
 563         kfree(new_data);
 564 drop:
 565         /* drop the packet and keep the buffer in the bin */
 566         DP(NETIF_MSG_RX_STATUS,
 567            "Failed to allocate or map a new skb - dropping packet!\n");
 568         fp->eth_q_stats.rx_skb_alloc_failed++;
 569 }
 570
 571
 572 int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
 573 {
 574         struct bnx2x *bp = fp->bp;
 575         u16 bd_cons, bd_prod, bd_prod_fw, comp_ring_cons;
 576         u16 hw_comp_cons, sw_comp_cons, sw_comp_prod;
 577         int rx_pkt = 0;
 578
 579 #ifdef BNX2X_STOP_ON_ERROR
 580         if (unlikely(bp->panic))
 581                 return 0;
 582 #endif
 583
 584         /* CQ "next element" is of the size of the regular element,
 585            that's why it's ok here */
 586         hw_comp_cons = le16_to_cpu(*fp->rx_cons_sb);
 587         if ((hw_comp_cons & MAX_RCQ_DESC_CNT) == MAX_RCQ_DESC_CNT)
 588                 hw_comp_cons++;
 589
 590         bd_cons = fp->rx_bd_cons;
 591         bd_prod = fp->rx_bd_prod;
 592         bd_prod_fw = bd_prod;
 593         sw_comp_cons = fp->rx_comp_cons;
 594         sw_comp_prod = fp->rx_comp_prod;
 595
 596         /* Memory barrier necessary as speculative reads of the rx
 597          * buffer can be ahead of the index in the status block
 598          */
 599         rmb();
 600
 601         DP(NETIF_MSG_RX_STATUS,
 602            "queue[%d]:  hw_comp_cons %u  sw_comp_cons %u\n",
 603            fp->index, hw_comp_cons, sw_comp_cons);
 604
 605         while (sw_comp_cons != hw_comp_cons) {
 606                 struct sw_rx_bd *rx_buf = NULL;
 607                 struct sk_buff *skb;
 608                 union eth_rx_cqe *cqe;
 609                 struct eth_fast_path_rx_cqe *cqe_fp;
 610                 u8 cqe_fp_flags;
 611                 enum eth_rx_cqe_type cqe_fp_type;
 612                 u16 len, pad, queue;
 613                 u8 *data;
 614
 615 #ifdef BNX2X_STOP_ON_ERROR
 616                 if (unlikely(bp->panic))
 617                         return 0;
 618 #endif
 619
 620                 comp_ring_cons = RCQ_BD(sw_comp_cons);
 621                 bd_prod = RX_BD(bd_prod);
 622                 bd_cons = RX_BD(bd_cons);
 623
 624                 cqe = &fp->rx_comp_ring[comp_ring_cons];
 625                 cqe_fp = &cqe->fast_path_cqe;
 626                 cqe_fp_flags = cqe_fp->type_error_flags;
 627                 cqe_fp_type = cqe_fp_flags & ETH_FAST_PATH_RX_CQE_TYPE;
 628
 629                 DP(NETIF_MSG_RX_STATUS,
 630                    "CQE type %x  err %x  status %x  queue %x  vlan %x  len %u\n",
 631                    CQE_TYPE(cqe_fp_flags),
 632                    cqe_fp_flags, cqe_fp->status_flags,
 633                    le32_to_cpu(cqe_fp->rss_hash_result),
 634                    le16_to_cpu(cqe_fp->vlan_tag),
 635                    le16_to_cpu(cqe_fp->pkt_len_or_gro_seg_len));
 636
 637                 /* is this a slowpath msg? */
 638                 if (unlikely(CQE_TYPE_SLOW(cqe_fp_type))) {
 639                         bnx2x_sp_event(fp, cqe);
 640                         goto next_cqe;
 641                 }
 642
 643                 rx_buf = &fp->rx_buf_ring[bd_cons];
 644                 data = rx_buf->data;
 645
 646                 if (!CQE_TYPE_FAST(cqe_fp_type)) {
 647                         struct bnx2x_agg_info *tpa_info;
 648                         u16 frag_size, pages;
 649 #ifdef BNX2X_STOP_ON_ERROR
 650                         /* sanity check */
 651                         if (fp->disable_tpa &&
 652                             (CQE_TYPE_START(cqe_fp_type) ||
 653                              CQE_TYPE_STOP(cqe_fp_type)))
 654                                 BNX2X_ERR("START/STOP packet while disable_tpa type %x\n",
 655                                           CQE_TYPE(cqe_fp_type));
 656 #endif
 657
 658                         if (CQE_TYPE_START(cqe_fp_type)) {
 659                                 u16 queue = cqe_fp->queue_index;
 660                                 DP(NETIF_MSG_RX_STATUS,
 661                                    "calling tpa_start on queue %d\n",
 662                                    queue);
 663
 664                                 bnx2x_tpa_start(fp, queue,
 665                                                 bd_cons, bd_prod,
 666                                                 cqe_fp);
 667
 668                                 goto next_rx;
 669
 670                         }
 671                         queue = cqe->end_agg_cqe.queue_index;
 672                         tpa_info = &fp->tpa_info[queue];
 673                         DP(NETIF_MSG_RX_STATUS,
 674                            "calling tpa_stop on queue %d\n",
 675                            queue);
 676
 677                         frag_size = le16_to_cpu(cqe->end_agg_cqe.pkt_len) -
 678                                     tpa_info->len_on_bd;
 679
 680                         if (fp->mode == TPA_MODE_GRO)
 681                                 pages = (frag_size + tpa_info->full_page - 1) /
 682                                          tpa_info->full_page;
 683                         else
 684                                 pages = SGE_PAGE_ALIGN(frag_size) >>
 685                                         SGE_PAGE_SHIFT;
 686
 687                         bnx2x_tpa_stop(bp, fp, tpa_info, pages,
 688                                        &cqe->end_agg_cqe, comp_ring_cons);
 689 #ifdef BNX2X_STOP_ON_ERROR
 690                         if (bp->panic)
 691                                 return 0;
 692 #endif
 693
 694                         bnx2x_update_sge_prod(fp, pages, &cqe->end_agg_cqe);
 695                         goto next_cqe;
 696                 }
 697                 /* non TPA */
 698                 len = le16_to_cpu(cqe_fp->pkt_len_or_gro_seg_len);
 699                 pad = cqe_fp->placement_offset;
 700                 dma_sync_single_for_cpu(&bp->pdev->dev,
 701                                         dma_unmap_addr(rx_buf, mapping),
 702                                         pad + RX_COPY_THRESH,
 703                                         DMA_FROM_DEVICE);
 704                 pad += NET_SKB_PAD;
 705                 prefetch(data + pad); /* speedup eth_type_trans() */
 706                 /* is this an error packet? */
 707                 if (unlikely(cqe_fp_flags & ETH_RX_ERROR_FALGS)) {
 708                         DP(NETIF_MSG_RX_ERR | NETIF_MSG_RX_STATUS,
 709                            "ERROR  flags %x  rx packet %u\n",
 710                            cqe_fp_flags, sw_comp_cons);
 711                         fp->eth_q_stats.rx_err_discard_pkt++;
 712                         goto reuse_rx;
 713                 }
 714
 715                 /* Since we don't have a jumbo ring
 716                  * copy small packets if mtu > 1500
 717                  */
 718                 if ((bp->dev->mtu > ETH_MAX_PACKET_SIZE) &&
 719                     (len <= RX_COPY_THRESH)) {
 720                         skb = netdev_alloc_skb_ip_align(bp->dev, len);
 721                         if (skb == NULL) {
 722                                 DP(NETIF_MSG_RX_ERR | NETIF_MSG_RX_STATUS,
 723                                    "ERROR  packet dropped because of alloc failure\n");
 724                                 fp->eth_q_stats.rx_skb_alloc_failed++;
 725                                 goto reuse_rx;
 726                         }
 727                         memcpy(skb->data, data + pad, len);
 728                         bnx2x_reuse_rx_data(fp, bd_cons, bd_prod);
 729                 } else {
 730                         if (likely(bnx2x_alloc_rx_data(bp, fp, bd_prod) == 0)) {
 731                                 dma_unmap_single(&bp->pdev->dev,
 732                                                  dma_unmap_addr(rx_buf, mapping),
 733                                                  fp->rx_buf_size,
 734                                                  DMA_FROM_DEVICE);
 735                                 skb = build_skb(data);
 736                                 if (unlikely(!skb)) {
 737                                         kfree(data);
 738                                         fp->eth_q_stats.rx_skb_alloc_failed++;
 739                                         goto next_rx;
 740                                 }
 741                                 skb_reserve(skb, pad);
 742                         } else {
 743                                 DP(NETIF_MSG_RX_ERR | NETIF_MSG_RX_STATUS,
 744                                    "ERROR  packet dropped because of alloc failure\n");
 745                                 fp->eth_q_stats.rx_skb_alloc_failed++;
 746 reuse_rx:
 747                                 bnx2x_reuse_rx_data(fp, bd_cons, bd_prod);
 748                                 goto next_rx;
 749                         }
 750                 }
 751
 752                 skb_put(skb, len);
 753                 skb->protocol = eth_type_trans(skb, bp->dev);
 754
 755                 /* Set Toeplitz hash for a none-LRO skb */
 756                 skb->rxhash = bnx2x_get_rxhash(bp, cqe_fp);
 757
 758                 skb_checksum_none_assert(skb);
 759
 760                 if (bp->dev->features & NETIF_F_RXCSUM) {
 761
 762                         if (likely(BNX2X_RX_CSUM_OK(cqe)))
 763                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 764                         else
 765                                 fp->eth_q_stats.hw_csum_err++;
 766                 }
 767
 768                 skb_record_rx_queue(skb, fp->rx_queue);
 769
 770                 if (le16_to_cpu(cqe_fp->pars_flags.flags) &
 771                     PARSING_FLAGS_VLAN)
 772                         __vlan_hwaccel_put_tag(skb,
 773                                                le16_to_cpu(cqe_fp->vlan_tag));
 774                 napi_gro_receive(&fp->napi, skb);
 775
 776
 777 next_rx:
 778                 rx_buf->data = NULL;
 779
 780                 bd_cons = NEXT_RX_IDX(bd_cons);
 781                 bd_prod = NEXT_RX_IDX(bd_prod);
 782                 bd_prod_fw = NEXT_RX_IDX(bd_prod_fw);
 783                 rx_pkt++;
 784 next_cqe:
 785                 sw_comp_prod = NEXT_RCQ_IDX(sw_comp_prod);
 786                 sw_comp_cons = NEXT_RCQ_IDX(sw_comp_cons);
 787
 788                 if (rx_pkt == budget)
 789                         break;
 790         } /* while */
 791
 792         fp->rx_bd_cons = bd_cons;
 793         fp->rx_bd_prod = bd_prod_fw;
 794         fp->rx_comp_cons = sw_comp_cons;
 795         fp->rx_comp_prod = sw_comp_prod;
 796
 797         /* Update producers */
 798         bnx2x_update_rx_prod(bp, fp, bd_prod_fw, sw_comp_prod,
 799                              fp->rx_sge_prod);
 800
 801         fp->rx_pkt += rx_pkt;
 802         fp->rx_calls++;
 803
 804         return rx_pkt;
 805 }
 806
 807 static irqreturn_t bnx2x_msix_fp_int(int irq, void *fp_cookie)
 808 {
 809         struct bnx2x_fastpath *fp = fp_cookie;
 810         struct bnx2x *bp = fp->bp;
 811         u8 cos;
 812
 813         DP(NETIF_MSG_INTR,
 814            "got an MSI-X interrupt on IDX:SB [fp %d fw_sd %d igusb %d]\n",
 815            fp->index, fp->fw_sb_id, fp->igu_sb_id);
 816         bnx2x_ack_sb(bp, fp->igu_sb_id, USTORM_ID, 0, IGU_INT_DISABLE, 0);
 817
 818 #ifdef BNX2X_STOP_ON_ERROR
 819         if (unlikely(bp->panic))
 820                 return IRQ_HANDLED;
 821 #endif
 822
 823         /* Handle Rx and Tx according to MSI-X vector */
 824         prefetch(fp->rx_cons_sb);
 825
 826         for_each_cos_in_tx_queue(fp, cos)
 827                 prefetch(fp->txdata[cos].tx_cons_sb);
 828
 829         prefetch(&fp->sb_running_index[SM_RX_ID]);
 830         napi_schedule(&bnx2x_fp(bp, fp->index, napi));
 831
 832         return IRQ_HANDLED;
 833 }
 834
 835 /* HW Lock for shared dual port PHYs */
 836 void bnx2x_acquire_phy_lock(struct bnx2x *bp)
 837 {
 838         mutex_lock(&bp->port.phy_mutex);
 839
 840         if (bp->port.need_hw_lock)
 841                 bnx2x_acquire_hw_lock(bp, HW_LOCK_RESOURCE_MDIO);
 842 }
 843
 844 void bnx2x_release_phy_lock(struct bnx2x *bp)
 845 {
 846         if (bp->port.need_hw_lock)
 847                 bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_MDIO);
 848
 849         mutex_unlock(&bp->port.phy_mutex);
 850 }
 851
 852 /* calculates MF speed according to current linespeed and MF configuration */
 853 u16 bnx2x_get_mf_speed(struct bnx2x *bp)
 854 {
 855         u16 line_speed = bp->link_vars.line_speed;
 856         if (IS_MF(bp)) {
 857                 u16 maxCfg = bnx2x_extract_max_cfg(bp,
 858                                                    bp->mf_config[BP_VN(bp)]);
 859
 860                 /* Calculate the current MAX line speed limit for the MF
 861                  * devices
 862                  */
 863                 if (IS_MF_SI(bp))
 864                         line_speed = (line_speed * maxCfg) / 100;
 865                 else { /* SD mode */
 866                         u16 vn_max_rate = maxCfg * 100;
 867
 868                         if (vn_max_rate < line_speed)
 869                                 line_speed = vn_max_rate;
 870                 }
 871         }
 872
 873         return line_speed;
 874 }
 875
 876 /**
 877  * bnx2x_fill_report_data - fill link report data to report
 878  *
 879  * @bp:         driver handle
 880  * @data:       link state to update
 881  *
 882  * It uses a none-atomic bit operations because is called under the mutex.
 883  */
 884 static inline void bnx2x_fill_report_data(struct bnx2x *bp,
 885                                           struct bnx2x_link_report_data *data)
 886 {
 887         u16 line_speed = bnx2x_get_mf_speed(bp);
 888
 889         memset(data, 0, sizeof(*data));
 890
 891         /* Fill the report data: efective line speed */
 892         data->line_speed = line_speed;
 893
 894         /* Link is down */
 895         if (!bp->link_vars.link_up || (bp->flags & MF_FUNC_DIS))
 896                 __set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
 897                           &data->link_report_flags);
 898
 899         /* Full DUPLEX */
 900         if (bp->link_vars.duplex == DUPLEX_FULL)
 901                 __set_bit(BNX2X_LINK_REPORT_FD, &data->link_report_flags);
 902
 903         /* Rx Flow Control is ON */
 904         if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_RX)
 905                 __set_bit(BNX2X_LINK_REPORT_RX_FC_ON, &data->link_report_flags);
 906
 907         /* Tx Flow Control is ON */
 908         if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_TX)
 909                 __set_bit(BNX2X_LINK_REPORT_TX_FC_ON, &data->link_report_flags);
 910 }
 911
 912 /**
 913  * bnx2x_link_report - report link status to OS.
 914  *
 915  * @bp:         driver handle
 916  *
 917  * Calls the __bnx2x_link_report() under the same locking scheme
 918  * as a link/PHY state managing code to ensure a consistent link
 919  * reporting.
 920  */
 921
 922 void bnx2x_link_report(struct bnx2x *bp)
 923 {
 924         bnx2x_acquire_phy_lock(bp);
 925         __bnx2x_link_report(bp);
 926         bnx2x_release_phy_lock(bp);
 927 }
 928
 929 /**
 930  * __bnx2x_link_report - report link status to OS.
 931  *
 932  * @bp:         driver handle
 933  *
 934  * None atomic inmlementation.
 935  * Should be called under the phy_lock.
 936  */
 937 void __bnx2x_link_report(struct bnx2x *bp)
 938 {
 939         struct bnx2x_link_report_data cur_data;
 940
 941         /* reread mf_cfg */
 942         if (!CHIP_IS_E1(bp))
 943                 bnx2x_read_mf_cfg(bp);
 944
 945         /* Read the current link report info */
 946         bnx2x_fill_report_data(bp, &cur_data);
 947
 948         /* Don't report link down or exactly the same link status twice */
 949         if (!memcmp(&cur_data, &bp->last_reported_link, sizeof(cur_data)) ||
 950             (test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
 951                       &bp->last_reported_link.link_report_flags) &&
 952              test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
 953                       &cur_data.link_report_flags)))
 954                 return;
 955
 956         bp->link_cnt++;
 957
 958         /* We are going to report a new link parameters now -
 959          * remember the current data for the next time.
 960          */
 961         memcpy(&bp->last_reported_link, &cur_data, sizeof(cur_data));
 962
 963         if (test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
 964                      &cur_data.link_report_flags)) {
 965                 netif_carrier_off(bp->dev);
 966                 netdev_err(bp->dev, "NIC Link is Down\n");
 967                 return;
 968         } else {
 969                 const char *duplex;
 970                 const char *flow;
 971
 972                 netif_carrier_on(bp->dev);
 973
 974                 if (test_and_clear_bit(BNX2X_LINK_REPORT_FD,
 975                                        &cur_data.link_report_flags))
 976                         duplex = "full";
 977                 else
 978                         duplex = "half";
 979
 980                 /* Handle the FC at the end so that only these flags would be
 981                  * possibly set. This way we may easily check if there is no FC
 982                  * enabled.
 983                  */
 984                 if (cur_data.link_report_flags) {
 985                         if (test_bit(BNX2X_LINK_REPORT_RX_FC_ON,
 986                                      &cur_data.link_report_flags)) {
 987                                 if (test_bit(BNX2X_LINK_REPORT_TX_FC_ON,
 988                                      &cur_data.link_report_flags))
 989                                         flow = "ON - receive & transmit";
 990                                 else
 991                                         flow = "ON - receive";
 992                         } else {
 993                                 flow = "ON - transmit";
 994                         }
 995                 } else {
 996                         flow = "none";
 997                 }
 998                 netdev_info(bp->dev, "NIC Link is Up, %d Mbps %s duplex, Flow control: %s\n",
 999                             cur_data.line_speed, duplex, flow);
1000         }
1001 }
1002
1003 void bnx2x_init_rx_rings(struct bnx2x *bp)
1004 {
1005         int func = BP_FUNC(bp);
1006         u16 ring_prod;
1007         int i, j;
1008
1009         /* Allocate TPA resources */
1010         for_each_rx_queue(bp, j) {
1011                 struct bnx2x_fastpath *fp = &bp->fp[j];
1012
1013                 DP(NETIF_MSG_IFUP,
1014                    "mtu %d  rx_buf_size %d\n", bp->dev->mtu, fp->rx_buf_size);
1015
1016                 if (!fp->disable_tpa) {
1017                         /* Fill the per-aggregtion pool */
1018                         for (i = 0; i < MAX_AGG_QS(bp); i++) {
1019                                 struct bnx2x_agg_info *tpa_info =
1020                                         &fp->tpa_info[i];
1021                                 struct sw_rx_bd *first_buf =
1022                                         &tpa_info->first_buf;
1023
1024                                 first_buf->data = kmalloc(fp->rx_buf_size + NET_SKB_PAD,
1025                                                           GFP_ATOMIC);
1026                                 if (!first_buf->data) {
1027                                         BNX2X_ERR("Failed to allocate TPA skb pool for queue[%d] - disabling TPA on this queue!\n",
1028                                                   j);
1029                                         bnx2x_free_tpa_pool(bp, fp, i);
1030                                         fp->disable_tpa = 1;
1031                                         break;
1032                                 }
1033                                 dma_unmap_addr_set(first_buf, mapping, 0);
1034                                 tpa_info->tpa_state = BNX2X_TPA_STOP;
1035                         }
1036
1037                         /* "next page" elements initialization */
1038                         bnx2x_set_next_page_sgl(fp);
1039
1040                         /* set SGEs bit mask */
1041                         bnx2x_init_sge_ring_bit_mask(fp);
1042
1043                         /* Allocate SGEs and initialize the ring elements */
1044                         for (i = 0, ring_prod = 0;
1045                              i < MAX_RX_SGE_CNT*NUM_RX_SGE_PAGES; i++) {
1046
1047                                 if (bnx2x_alloc_rx_sge(bp, fp, ring_prod) < 0) {
1048                                         BNX2X_ERR("was only able to allocate %d rx sges\n",
1049                                                   i);
1050                                         BNX2X_ERR("disabling TPA for queue[%d]\n",
1051                                                   j);
1052                                         /* Cleanup already allocated elements */
1053                                         bnx2x_free_rx_sge_range(bp, fp,
1054                                                                 ring_prod);
1055                                         bnx2x_free_tpa_pool(bp, fp,
1056                                                             MAX_AGG_QS(bp));
1057                                         fp->disable_tpa = 1;
1058                                         ring_prod = 0;
1059                                         break;
1060                                 }
1061                                 ring_prod = NEXT_SGE_IDX(ring_prod);
1062                         }
1063
1064                         fp->rx_sge_prod = ring_prod;
1065                 }
1066         }
1067
1068         for_each_rx_queue(bp, j) {
1069                 struct bnx2x_fastpath *fp = &bp->fp[j];
1070
1071                 fp->rx_bd_cons = 0;
1072
1073                 /* Activate BD ring */
1074                 /* Warning!
1075                  * this will generate an interrupt (to the TSTORM)
1076                  * must only be done after chip is initialized
1077                  */
1078                 bnx2x_update_rx_prod(bp, fp, fp->rx_bd_prod, fp->rx_comp_prod,
1079                                      fp->rx_sge_prod);
1080
1081                 if (j != 0)
1082                         continue;
1083
1084                 if (CHIP_IS_E1(bp)) {
1085                         REG_WR(bp, BAR_USTRORM_INTMEM +
1086                                USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func),
1087                                U64_LO(fp->rx_comp_mapping));
1088                         REG_WR(bp, BAR_USTRORM_INTMEM +
1089                                USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func) + 4,
1090                                U64_HI(fp->rx_comp_mapping));
1091                 }
1092         }
1093 }
1094
1095 static void bnx2x_free_tx_skbs(struct bnx2x *bp)
1096 {
1097         int i;
1098         u8 cos;
1099
1100         for_each_tx_queue(bp, i) {
1101                 struct bnx2x_fastpath *fp = &bp->fp[i];
1102                 for_each_cos_in_tx_queue(fp, cos) {
1103                         struct bnx2x_fp_txdata *txdata = &fp->txdata[cos];
1104                         unsigned pkts_compl = 0, bytes_compl = 0;
1105
1106                         u16 sw_prod = txdata->tx_pkt_prod;
1107                         u16 sw_cons = txdata->tx_pkt_cons;
1108
1109                         while (sw_cons != sw_prod) {
1110                                 bnx2x_free_tx_pkt(bp, txdata, TX_BD(sw_cons),
1111                                     &pkts_compl, &bytes_compl);
1112                                 sw_cons++;
1113                         }
1114                         netdev_tx_reset_queue(
1115                             netdev_get_tx_queue(bp->dev, txdata->txq_index));
1116                 }
1117         }
1118 }
1119
1120 static void bnx2x_free_rx_bds(struct bnx2x_fastpath *fp)
1121 {
1122         struct bnx2x *bp = fp->bp;
1123         int i;
1124
1125         /* ring wasn't allocated */
1126         if (fp->rx_buf_ring == NULL)
1127                 return;
1128
1129         for (i = 0; i < NUM_RX_BD; i++) {
1130                 struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[i];
1131                 u8 *data = rx_buf->data;
1132
1133                 if (data == NULL)
1134                         continue;
1135                 dma_unmap_single(&bp->pdev->dev,
1136                                  dma_unmap_addr(rx_buf, mapping),
1137                                  fp->rx_buf_size, DMA_FROM_DEVICE);
1138
1139                 rx_buf->data = NULL;
1140                 kfree(data);
1141         }
1142 }
1143
1144 static void bnx2x_free_rx_skbs(struct bnx2x *bp)
1145 {
1146         int j;
1147
1148         for_each_rx_queue(bp, j) {
1149                 struct bnx2x_fastpath *fp = &bp->fp[j];
1150
1151                 bnx2x_free_rx_bds(fp);
1152
1153                 if (!fp->disable_tpa)
1154                         bnx2x_free_tpa_pool(bp, fp, MAX_AGG_QS(bp));
1155         }
1156 }
1157
1158 void bnx2x_free_skbs(struct bnx2x *bp)
1159 {
1160         bnx2x_free_tx_skbs(bp);
1161         bnx2x_free_rx_skbs(bp);
1162 }
1163
1164 void bnx2x_update_max_mf_config(struct bnx2x *bp, u32 value)
1165 {
1166         /* load old values */
1167         u32 mf_cfg = bp->mf_config[BP_VN(bp)];
1168
1169         if (value != bnx2x_extract_max_cfg(bp, mf_cfg)) {
1170                 /* leave all but MAX value */
1171                 mf_cfg &= ~FUNC_MF_CFG_MAX_BW_MASK;
1172
1173                 /* set new MAX value */
1174                 mf_cfg |= (value << FUNC_MF_CFG_MAX_BW_SHIFT)
1175                                 & FUNC_MF_CFG_MAX_BW_MASK;
1176
1177                 bnx2x_fw_command(bp, DRV_MSG_CODE_SET_MF_BW, mf_cfg);
1178         }
1179 }
1180
1181 /**
1182  * bnx2x_free_msix_irqs - free previously requested MSI-X IRQ vectors
1183  *
1184  * @bp:         driver handle
1185  * @nvecs:      number of vectors to be released
1186  */
1187 static void bnx2x_free_msix_irqs(struct bnx2x *bp, int nvecs)
1188 {
1189         int i, offset = 0;
1190
1191         if (nvecs == offset)
1192                 return;
1193         free_irq(bp->msix_table[offset].vector, bp->dev);
1194         DP(NETIF_MSG_IFDOWN, "released sp irq (%d)\n",
1195            bp->msix_table[offset].vector);
1196         offset++;
1197 #ifdef BCM_CNIC
1198         if (nvecs == offset)
1199                 return;
1200         offset++;
1201 #endif
1202
1203         for_each_eth_queue(bp, i) {
1204                 if (nvecs == offset)
1205                         return;
1206                 DP(NETIF_MSG_IFDOWN, "about to release fp #%d->%d irq\n",
1207                    i, bp->msix_table[offset].vector);
1208
1209                 free_irq(bp->msix_table[offset++].vector, &bp->fp[i]);
1210         }
1211 }
1212
1213 void bnx2x_free_irq(struct bnx2x *bp)
1214 {
1215         if (bp->flags & USING_MSIX_FLAG)
1216                 bnx2x_free_msix_irqs(bp, BNX2X_NUM_ETH_QUEUES(bp) +
1217                                      CNIC_PRESENT + 1);
1218         else if (bp->flags & USING_MSI_FLAG)
1219                 free_irq(bp->pdev->irq, bp->dev);
1220         else
1221                 free_irq(bp->pdev->irq, bp->dev);
1222 }
1223
1224 int bnx2x_enable_msix(struct bnx2x *bp)
1225 {
1226         int msix_vec = 0, i, rc, req_cnt;
1227
1228         bp->msix_table[msix_vec].entry = msix_vec;
1229         BNX2X_DEV_INFO("msix_table[0].entry = %d (slowpath)\n",
1230            bp->msix_table[0].entry);
1231         msix_vec++;
1232
1233 #ifdef BCM_CNIC
1234         bp->msix_table[msix_vec].entry = msix_vec;
1235         BNX2X_DEV_INFO("msix_table[%d].entry = %d (CNIC)\n",
1236            bp->msix_table[msix_vec].entry, bp->msix_table[msix_vec].entry);
1237         msix_vec++;
1238 #endif
1239         /* We need separate vectors for ETH queues only (not FCoE) */
1240         for_each_eth_queue(bp, i) {
1241                 bp->msix_table[msix_vec].entry = msix_vec;
1242                 BNX2X_DEV_INFO("msix_table[%d].entry = %d (fastpath #%u)\n",
1243                                msix_vec, msix_vec, i);
1244                 msix_vec++;
1245         }
1246
1247         req_cnt = BNX2X_NUM_ETH_QUEUES(bp) + CNIC_PRESENT + 1;
1248
1249         rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], req_cnt);
1250
1251         /*
1252          * reconfigure number of tx/rx queues according to available
1253          * MSI-X vectors
1254          */
1255         if (rc >= BNX2X_MIN_MSIX_VEC_CNT) {
1256                 /* how less vectors we will have? */
1257                 int diff = req_cnt - rc;
1258
1259                 BNX2X_DEV_INFO("Trying to use less MSI-X vectors: %d\n", rc);
1260
1261                 rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], rc);
1262
1263                 if (rc) {
1264                         BNX2X_DEV_INFO("MSI-X is not attainable  rc %d\n", rc);
1265                         return rc;
1266                 }
1267                 /*
1268                  * decrease number of queues by number of unallocated entries
1269                  */
1270                 bp->num_queues -= diff;
1271
1272                 BNX2X_DEV_INFO("New queue configuration set: %d\n",
1273                                   bp->num_queues);
1274         } else if (rc) {
1275                 /* fall to INTx if not enough memory */
1276                 if (rc == -ENOMEM)
1277                         bp->flags |= DISABLE_MSI_FLAG;
1278                 BNX2X_DEV_INFO("MSI-X is not attainable  rc %d\n", rc);
1279                 return rc;
1280         }
1281
1282         bp->flags |= USING_MSIX_FLAG;
1283
1284         return 0;
1285 }
1286
1287 static int bnx2x_req_msix_irqs(struct bnx2x *bp)
1288 {
1289         int i, rc, offset = 0;
1290
1291         rc = request_irq(bp->msix_table[offset++].vector,
1292                          bnx2x_msix_sp_int, 0,
1293                          bp->dev->name, bp->dev);
1294         if (rc) {
1295                 BNX2X_ERR("request sp irq failed\n");
1296                 return -EBUSY;
1297         }
1298
1299 #ifdef BCM_CNIC
1300         offset++;
1301 #endif
1302         for_each_eth_queue(bp, i) {
1303                 struct bnx2x_fastpath *fp = &bp->fp[i];
1304                 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
1305                          bp->dev->name, i);
1306
1307                 rc = request_irq(bp->msix_table[offset].vector,
1308                                  bnx2x_msix_fp_int, 0, fp->name, fp);
1309                 if (rc) {
1310                         BNX2X_ERR("request fp #%d irq (%d) failed  rc %d\n", i,
1311                               bp->msix_table[offset].vector, rc);
1312                         bnx2x_free_msix_irqs(bp, offset);
1313                         return -EBUSY;
1314                 }
1315
1316                 offset++;
1317         }
1318
1319         i = BNX2X_NUM_ETH_QUEUES(bp);
1320         offset = 1 + CNIC_PRESENT;
1321         netdev_info(bp->dev, "using MSI-X  IRQs: sp %d  fp[%d] %d ... fp[%d] %d\n",
1322                bp->msix_table[0].vector,
1323                0, bp->msix_table[offset].vector,
1324                i - 1, bp->msix_table[offset + i - 1].vector);
1325
1326         return 0;
1327 }
1328
1329 int bnx2x_enable_msi(struct bnx2x *bp)
1330 {
1331         int rc;
1332
1333         rc = pci_enable_msi(bp->pdev);
1334         if (rc) {
1335                 BNX2X_DEV_INFO("MSI is not attainable\n");
1336                 return -1;
1337         }
1338         bp->flags |= USING_MSI_FLAG;
1339
1340         return 0;
1341 }
1342
1343 static int bnx2x_req_irq(struct bnx2x *bp)
1344 {
1345         unsigned long flags;
1346         int rc;
1347
1348         if (bp->flags & USING_MSI_FLAG)
1349                 flags = 0;
1350         else
1351                 flags = IRQF_SHARED;
1352
1353         rc = request_irq(bp->pdev->irq, bnx2x_interrupt, flags,
1354                          bp->dev->name, bp->dev);
1355         return rc;
1356 }
1357
1358 static inline int bnx2x_setup_irqs(struct bnx2x *bp)
1359 {
1360         int rc = 0;
1361         if (bp->flags & USING_MSIX_FLAG) {
1362                 rc = bnx2x_req_msix_irqs(bp);
1363                 if (rc)
1364                         return rc;
1365         } else {
1366                 bnx2x_ack_int(bp);
1367                 rc = bnx2x_req_irq(bp);
1368                 if (rc) {
1369                         BNX2X_ERR("IRQ request failed  rc %d, aborting\n", rc);
1370                         return rc;
1371                 }
1372                 if (bp->flags & USING_MSI_FLAG) {
1373                         bp->dev->irq = bp->pdev->irq;
1374                         netdev_info(bp->dev, "using MSI  IRQ %d\n",
1375                                bp->pdev->irq);
1376                 }
1377         }
1378
1379         return 0;
1380 }
1381
1382 static inline void bnx2x_napi_enable(struct bnx2x *bp)
1383 {
1384         int i;
1385
1386         for_each_rx_queue(bp, i)
1387                 napi_enable(&bnx2x_fp(bp, i, napi));
1388 }
1389
1390 static inline void bnx2x_napi_disable(struct bnx2x *bp)
1391 {
1392         int i;
1393
1394         for_each_rx_queue(bp, i)
1395                 napi_disable(&bnx2x_fp(bp, i, napi));
1396 }
1397
1398 void bnx2x_netif_start(struct bnx2x *bp)
1399 {
1400         if (netif_running(bp->dev)) {
1401                 bnx2x_napi_enable(bp);
1402                 bnx2x_int_enable(bp);
1403                 if (bp->state == BNX2X_STATE_OPEN)
1404                         netif_tx_wake_all_queues(bp->dev);
1405         }
1406 }
1407
1408 void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw)
1409 {
1410         bnx2x_int_disable_sync(bp, disable_hw);
1411         bnx2x_napi_disable(bp);
1412 }
1413
1414 u16 bnx2x_select_queue(struct net_device *dev, struct sk_buff *skb)
1415 {
1416         struct bnx2x *bp = netdev_priv(dev);
1417
1418 #ifdef BCM_CNIC
1419         if (!NO_FCOE(bp)) {
1420                 struct ethhdr *hdr = (struct ethhdr *)skb->data;
1421                 u16 ether_type = ntohs(hdr->h_proto);
1422
1423                 /* Skip VLAN tag if present */
1424                 if (ether_type == ETH_P_8021Q) {
1425                         struct vlan_ethhdr *vhdr =
1426                                 (struct vlan_ethhdr *)skb->data;
1427
1428                         ether_type = ntohs(vhdr->h_vlan_encapsulated_proto);
1429                 }
1430
1431                 /* If ethertype is FCoE or FIP - use FCoE ring */
1432                 if ((ether_type == ETH_P_FCOE) || (ether_type == ETH_P_FIP))
1433                         return bnx2x_fcoe_tx(bp, txq_index);
1434         }
1435 #endif
1436         /* select a non-FCoE queue */
1437         return __skb_tx_hash(dev, skb, BNX2X_NUM_ETH_QUEUES(bp));
1438 }
1439
1440 void bnx2x_set_num_queues(struct bnx2x *bp)
1441 {
1442         switch (bp->multi_mode) {
1443         case ETH_RSS_MODE_DISABLED:
1444                 bp->num_queues = 1;
1445                 break;
1446         case ETH_RSS_MODE_REGULAR:
1447                 bp->num_queues = bnx2x_calc_num_queues(bp);
1448                 break;
1449
1450         default:
1451                 bp->num_queues = 1;
1452                 break;
1453         }
1454
1455 #ifdef BCM_CNIC
1456         /* override in STORAGE SD mode */
1457         if (IS_MF_STORAGE_SD(bp))
1458                 bp->num_queues = 1;
1459 #endif
1460         /* Add special queues */
1461         bp->num_queues += NON_ETH_CONTEXT_USE;
1462 }
1463
1464 /**
1465  * bnx2x_set_real_num_queues - configure netdev->real_num_[tx,rx]_queues
1466  *
1467  * @bp:         Driver handle
1468  *
1469  * We currently support for at most 16 Tx queues for each CoS thus we will
1470  * allocate a multiple of 16 for ETH L2 rings according to the value of the
1471  * bp->max_cos.
1472  *
1473  * If there is an FCoE L2 queue the appropriate Tx queue will have the next
1474  * index after all ETH L2 indices.
1475  *
1476  * If the actual number of Tx queues (for each CoS) is less than 16 then there
1477  * will be the holes at the end of each group of 16 ETh L2 indices (0..15,
1478  * 16..31,...) with indicies that are not coupled with any real Tx queue.
1479  *
1480  * The proper configuration of skb->queue_mapping is handled by
1481  * bnx2x_select_queue() and __skb_tx_hash().
1482  *
1483  * bnx2x_setup_tc() takes care of the proper TC mappings so that __skb_tx_hash()
1484  * will return a proper Tx index if TC is enabled (netdev->num_tc > 0).
1485  */
1486 static inline int bnx2x_set_real_num_queues(struct bnx2x *bp)
1487 {
1488         int rc, tx, rx;
1489
1490         tx = MAX_TXQS_PER_COS * bp->max_cos;
1491         rx = BNX2X_NUM_ETH_QUEUES(bp);
1492
1493 /* account for fcoe queue */
1494 #ifdef BCM_CNIC
1495         if (!NO_FCOE(bp)) {
1496                 rx += FCOE_PRESENT;
1497                 tx += FCOE_PRESENT;
1498         }
1499 #endif
1500
1501         rc = netif_set_real_num_tx_queues(bp->dev, tx);
1502         if (rc) {
1503                 BNX2X_ERR("Failed to set real number of Tx queues: %d\n", rc);
1504                 return rc;
1505         }
1506         rc = netif_set_real_num_rx_queues(bp->dev, rx);
1507         if (rc) {
1508                 BNX2X_ERR("Failed to set real number of Rx queues: %d\n", rc);
1509                 return rc;
1510         }
1511
1512         DP(NETIF_MSG_IFUP, "Setting real num queues to (tx, rx) (%d, %d)\n",
1513                           tx, rx);
1514
1515         return rc;
1516 }
1517
1518 static inline void bnx2x_set_rx_buf_size(struct bnx2x *bp)
1519 {
1520         int i;
1521
1522         for_each_queue(bp, i) {
1523                 struct bnx2x_fastpath *fp = &bp->fp[i];
1524                 u32 mtu;
1525
1526                 /* Always use a mini-jumbo MTU for the FCoE L2 ring */
1527                 if (IS_FCOE_IDX(i))
1528                         /*
1529                          * Although there are no IP frames expected to arrive to
1530                          * this ring we still want to add an
1531                          * IP_HEADER_ALIGNMENT_PADDING to prevent a buffer
1532                          * overrun attack.
1533                          */
1534                         mtu = BNX2X_FCOE_MINI_JUMBO_MTU;
1535                 else
1536                         mtu = bp->dev->mtu;
1537                 fp->rx_buf_size = BNX2X_FW_RX_ALIGN_START +
1538                                   IP_HEADER_ALIGNMENT_PADDING +
1539                                   ETH_OVREHEAD +
1540                                   mtu +
1541                                   BNX2X_FW_RX_ALIGN_END;
1542                 /* Note : rx_buf_size doesnt take into account NET_SKB_PAD */
1543         }
1544 }
1545
1546 static inline int bnx2x_init_rss_pf(struct bnx2x *bp)
1547 {
1548         int i;
1549         u8 ind_table[T_ETH_INDIRECTION_TABLE_SIZE] = {0};
1550         u8 num_eth_queues = BNX2X_NUM_ETH_QUEUES(bp);
1551
1552         /*
1553          * Prepare the inital contents fo the indirection table if RSS is
1554          * enabled
1555          */
1556         if (bp->multi_mode != ETH_RSS_MODE_DISABLED) {
1557                 for (i = 0; i < sizeof(ind_table); i++)
1558                         ind_table[i] =
1559                                 bp->fp->cl_id +
1560                                 ethtool_rxfh_indir_default(i, num_eth_queues);
1561         }
1562
1563         /*
1564          * For 57710 and 57711 SEARCHER configuration (rss_keys) is
1565          * per-port, so if explicit configuration is needed , do it only
1566          * for a PMF.
1567          *
1568          * For 57712 and newer on the other hand it's a per-function
1569          * configuration.
1570          */
1571         return bnx2x_config_rss_pf(bp, ind_table,
1572                                    bp->port.pmf || !CHIP_IS_E1x(bp));
1573 }
1574
1575 int bnx2x_config_rss_pf(struct bnx2x *bp, u8 *ind_table, bool config_hash)
1576 {
1577         struct bnx2x_config_rss_params params = {NULL};
1578         int i;
1579
1580         /* Although RSS is meaningless when there is a single HW queue we
1581          * still need it enabled in order to have HW Rx hash generated.
1582          *
1583          * if (!is_eth_multi(bp))
1584          *      bp->multi_mode = ETH_RSS_MODE_DISABLED;
1585          */
1586
1587         params.rss_obj = &bp->rss_conf_obj;
1588
1589         __set_bit(RAMROD_COMP_WAIT, &params.ramrod_flags);
1590
1591         /* RSS mode */
1592         switch (bp->multi_mode) {
1593         case ETH_RSS_MODE_DISABLED:
1594                 __set_bit(BNX2X_RSS_MODE_DISABLED, &params.rss_flags);
1595                 break;
1596         case ETH_RSS_MODE_REGULAR:
1597                 __set_bit(BNX2X_RSS_MODE_REGULAR, &params.rss_flags);
1598                 break;
1599         case ETH_RSS_MODE_VLAN_PRI:
1600                 __set_bit(BNX2X_RSS_MODE_VLAN_PRI, &params.rss_flags);
1601                 break;
1602         case ETH_RSS_MODE_E1HOV_PRI:
1603                 __set_bit(BNX2X_RSS_MODE_E1HOV_PRI, &params.rss_flags);
1604                 break;
1605         case ETH_RSS_MODE_IP_DSCP:
1606                 __set_bit(BNX2X_RSS_MODE_IP_DSCP, &params.rss_flags);
1607                 break;
1608         default:
1609                 BNX2X_ERR("Unknown multi_mode: %d\n", bp->multi_mode);
1610                 return -EINVAL;
1611         }
1612
1613         /* If RSS is enabled */
1614         if (bp->multi_mode != ETH_RSS_MODE_DISABLED) {
1615                 /* RSS configuration */
1616                 __set_bit(BNX2X_RSS_IPV4, &params.rss_flags);
1617                 __set_bit(BNX2X_RSS_IPV4_TCP, &params.rss_flags);
1618                 __set_bit(BNX2X_RSS_IPV6, &params.rss_flags);
1619                 __set_bit(BNX2X_RSS_IPV6_TCP, &params.rss_flags);
1620
1621                 /* Hash bits */
1622                 params.rss_result_mask = MULTI_MASK;
1623
1624                 memcpy(params.ind_table, ind_table, sizeof(params.ind_table));
1625
1626                 if (config_hash) {
1627                         /* RSS keys */
1628                         for (i = 0; i < sizeof(params.rss_key) / 4; i++)
1629                                 params.rss_key[i] = random32();
1630
1631                         __set_bit(BNX2X_RSS_SET_SRCH, &params.rss_flags);
1632                 }
1633         }
1634
1635         return bnx2x_config_rss(bp, &params);
1636 }
1637
1638 static inline int bnx2x_init_hw(struct bnx2x *bp, u32 load_code)
1639 {
1640         struct bnx2x_func_state_params func_params = {NULL};
1641
1642         /* Prepare parameters for function state transitions */
1643         __set_bit(RAMROD_COMP_WAIT, &func_params.ramrod_flags);
1644
1645         func_params.f_obj = &bp->func_obj;
1646         func_params.cmd = BNX2X_F_CMD_HW_INIT;
1647
1648         func_params.params.hw_init.load_phase = load_code;
1649
1650         return bnx2x_func_state_change(bp, &func_params);
1651 }
1652
1653 /*
1654  * Cleans the object that have internal lists without sending
1655  * ramrods. Should be run when interrutps are disabled.
1656  */
1657 static void bnx2x_squeeze_objects(struct bnx2x *bp)
1658 {
1659         int rc;
1660         unsigned long ramrod_flags = 0, vlan_mac_flags = 0;
1661         struct bnx2x_mcast_ramrod_params rparam = {NULL};
1662         struct bnx2x_vlan_mac_obj *mac_obj = &bp->fp->mac_obj;
1663
1664         /***************** Cleanup MACs' object first *************************/
1665
1666         /* Wait for completion of requested */
1667         __set_bit(RAMROD_COMP_WAIT, &ramrod_flags);
1668         /* Perform a dry cleanup */
1669         __set_bit(RAMROD_DRV_CLR_ONLY, &ramrod_flags);
1670
1671         /* Clean ETH primary MAC */
1672         __set_bit(BNX2X_ETH_MAC, &vlan_mac_flags);
1673         rc = mac_obj->delete_all(bp, &bp->fp->mac_obj, &vlan_mac_flags,
1674                                  &ramrod_flags);
1675         if (rc != 0)
1676                 BNX2X_ERR("Failed to clean ETH MACs: %d\n", rc);
1677
1678         /* Cleanup UC list */
1679         vlan_mac_flags = 0;
1680         __set_bit(BNX2X_UC_LIST_MAC, &vlan_mac_flags);
1681         rc = mac_obj->delete_all(bp, mac_obj, &vlan_mac_flags,
1682                                  &ramrod_flags);
1683         if (rc != 0)
1684                 BNX2X_ERR("Failed to clean UC list MACs: %d\n", rc);
1685
1686         /***************** Now clean mcast object *****************************/
1687         rparam.mcast_obj = &bp->mcast_obj;
1688         __set_bit(RAMROD_DRV_CLR_ONLY, &rparam.ramrod_flags);
1689
1690         /* Add a DEL command... */
1691         rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_DEL);
1692         if (rc < 0)
1693                 BNX2X_ERR("Failed to add a new DEL command to a multi-cast object: %d\n",
1694                           rc);
1695
1696         /* ...and wait until all pending commands are cleared */
1697         rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_CONT);
1698         while (rc != 0) {
1699                 if (rc < 0) {
1700                         BNX2X_ERR("Failed to clean multi-cast object: %d\n",
1701                                   rc);
1702                         return;
1703                 }
1704
1705                 rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_CONT);
1706         }
1707 }
1708
1709 #ifndef BNX2X_STOP_ON_ERROR
1710 #define LOAD_ERROR_EXIT(bp, label) \
1711         do { \
1712                 (bp)->state = BNX2X_STATE_ERROR; \
1713                 goto label; \
1714         } while (0)
1715 #else
1716 #define LOAD_ERROR_EXIT(bp, label) \
1717         do { \
1718                 (bp)->state = BNX2X_STATE_ERROR; \
1719                 (bp)->panic = 1; \
1720                 return -EBUSY; \
1721         } while (0)
1722 #endif
1723
1724 /* must be called with rtnl_lock */
1725 int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
1726 {
1727         int port = BP_PORT(bp);
1728         u32 load_code;
1729         int i, rc;
1730
1731 #ifdef BNX2X_STOP_ON_ERROR
1732         if (unlikely(bp->panic)) {
1733                 BNX2X_ERR("Can't load NIC when there is panic\n");
1734                 return -EPERM;
1735         }
1736 #endif
1737
1738         bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD;
1739
1740         /* Set the initial link reported state to link down */
1741         bnx2x_acquire_phy_lock(bp);
1742         memset(&bp->last_reported_link, 0, sizeof(bp->last_reported_link));
1743         __set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
1744                 &bp->last_reported_link.link_report_flags);
1745         bnx2x_release_phy_lock(bp);
1746
1747         /* must be called before memory allocation and HW init */
1748         bnx2x_ilt_set_info(bp);
1749
1750         /*
1751          * Zero fastpath structures preserving invariants like napi, which are
1752          * allocated only once, fp index, max_cos, bp pointer.
1753          * Also set fp->disable_tpa.
1754          */
1755         DP(NETIF_MSG_IFUP, "num queues: %d", bp->num_queues);
1756         for_each_queue(bp, i)
1757                 bnx2x_bz_fp(bp, i);
1758
1759
1760         /* Set the receive queues buffer size */
1761         bnx2x_set_rx_buf_size(bp);
1762
1763         if (bnx2x_alloc_mem(bp))
1764                 return -ENOMEM;
1765
1766         /* As long as bnx2x_alloc_mem() may possibly update
1767          * bp->num_queues, bnx2x_set_real_num_queues() should always
1768          * come after it.
1769          */
1770         rc = bnx2x_set_real_num_queues(bp);
1771         if (rc) {
1772                 BNX2X_ERR("Unable to set real_num_queues\n");
1773                 LOAD_ERROR_EXIT(bp, load_error0);
1774         }
1775
1776         /* configure multi cos mappings in kernel.
1777          * this configuration may be overriden by a multi class queue discipline
1778          * or by a dcbx negotiation result.
1779          */
1780         bnx2x_setup_tc(bp->dev, bp->max_cos);
1781
1782         bnx2x_napi_enable(bp);
1783
1784         /* set pf load just before approaching the MCP */
1785         bnx2x_set_pf_load(bp);
1786
1787         /* Send LOAD_REQUEST command to MCP
1788          * Returns the type of LOAD command:
1789          * if it is the first port to be initialized
1790          * common blocks should be initialized, otherwise - not
1791          */
1792         if (!BP_NOMCP(bp)) {
1793                 /* init fw_seq */
1794                 bp->fw_seq =
1795                         (SHMEM_RD(bp, func_mb[BP_FW_MB_IDX(bp)].drv_mb_header) &
1796                          DRV_MSG_SEQ_NUMBER_MASK);
1797                 BNX2X_DEV_INFO("fw_seq 0x%08x\n", bp->fw_seq);
1798
1799                 /* Get current FW pulse sequence */
1800                 bp->fw_drv_pulse_wr_seq =
1801                         (SHMEM_RD(bp, func_mb[BP_FW_MB_IDX(bp)].drv_pulse_mb) &
1802                          DRV_PULSE_SEQ_MASK);
1803                 BNX2X_DEV_INFO("drv_pulse 0x%x\n", bp->fw_drv_pulse_wr_seq);
1804
1805                 load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_REQ, 0);
1806                 if (!load_code) {
1807                         BNX2X_ERR("MCP response failure, aborting\n");
1808                         rc = -EBUSY;
1809                         LOAD_ERROR_EXIT(bp, load_error1);
1810                 }
1811                 if (load_code == FW_MSG_CODE_DRV_LOAD_REFUSED) {
1812                         BNX2X_ERR("Driver load refused\n");
1813                         rc = -EBUSY; /* other port in diagnostic mode */
1814                         LOAD_ERROR_EXIT(bp, load_error1);
1815                 }
1816                 if (load_code != FW_MSG_CODE_DRV_LOAD_COMMON_CHIP &&
1817                     load_code != FW_MSG_CODE_DRV_LOAD_COMMON) {
1818                         /* build FW version dword */
1819                         u32 my_fw = (BCM_5710_FW_MAJOR_VERSION) +
1820                                         (BCM_5710_FW_MINOR_VERSION << 8) +
1821                                         (BCM_5710_FW_REVISION_VERSION << 16) +
1822                                         (BCM_5710_FW_ENGINEERING_VERSION << 24);
1823
1824                         /* read loaded FW from chip */
1825                         u32 loaded_fw = REG_RD(bp, XSEM_REG_PRAM);
1826
1827                         DP(BNX2X_MSG_SP, "loaded fw %x, my fw %x",
1828                            loaded_fw, my_fw);
1829
1830                         /* abort nic load if version mismatch */
1831                         if (my_fw != loaded_fw) {
1832                                 BNX2X_ERR("bnx2x with FW %x already loaded, "
1833                                           "which mismatches my %x FW. aborting",
1834                                           loaded_fw, my_fw);
1835                                 rc = -EBUSY;
1836                                 LOAD_ERROR_EXIT(bp, load_error2);
1837                         }
1838                 }
1839
1840         } else {
1841                 int path = BP_PATH(bp);
1842
1843                 DP(NETIF_MSG_IFUP, "NO MCP - load counts[%d]      %d, %d, %d\n",
1844                    path, load_count[path][0], load_count[path][1],
1845                    load_count[path][2]);
1846                 load_count[path][0]++;
1847                 load_count[path][1 + port]++;
1848                 DP(NETIF_MSG_IFUP, "NO MCP - new load counts[%d]  %d, %d, %d\n",
1849                    path, load_count[path][0], load_count[path][1],
1850                    load_count[path][2]);
1851                 if (load_count[path][0] == 1)
1852                         load_code = FW_MSG_CODE_DRV_LOAD_COMMON;
1853                 else if (load_count[path][1 + port] == 1)
1854                         load_code = FW_MSG_CODE_DRV_LOAD_PORT;
1855                 else
1856                         load_code = FW_MSG_CODE_DRV_LOAD_FUNCTION;
1857         }
1858
1859         if ((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) ||
1860             (load_code == FW_MSG_CODE_DRV_LOAD_COMMON_CHIP) ||
1861             (load_code == FW_MSG_CODE_DRV_LOAD_PORT)) {
1862                 bp->port.pmf = 1;
1863                 /*
1864                  * We need the barrier to ensure the ordering between the
1865                  * writing to bp->port.pmf here and reading it from the
1866                  * bnx2x_periodic_task().
1867                  */
1868                 smp_mb();
1869                 queue_delayed_work(bnx2x_wq, &bp->period_task, 0);
1870         } else
1871                 bp->port.pmf = 0;
1872
1873         DP(NETIF_MSG_IFUP, "pmf %d\n", bp->port.pmf);
1874
1875         /* Init Function state controlling object */
1876         bnx2x__init_func_obj(bp);
1877
1878         /* Initialize HW */
1879         rc = bnx2x_init_hw(bp, load_code);
1880         if (rc) {
1881                 BNX2X_ERR("HW init failed, aborting\n");
1882                 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
1883                 LOAD_ERROR_EXIT(bp, load_error2);
1884         }
1885
1886         /* Connect to IRQs */
1887         rc = bnx2x_setup_irqs(bp);
1888         if (rc) {
1889                 BNX2X_ERR("IRQs setup failed\n");
1890                 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
1891                 LOAD_ERROR_EXIT(bp, load_error2);
1892         }
1893
1894         /* Setup NIC internals and enable interrupts */
1895         bnx2x_nic_init(bp, load_code);
1896
1897         /* Init per-function objects */
1898         bnx2x_init_bp_objs(bp);
1899
1900         if (((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) ||
1901             (load_code == FW_MSG_CODE_DRV_LOAD_COMMON_CHIP)) &&
1902             (bp->common.shmem2_base)) {
1903                 if (SHMEM2_HAS(bp, dcc_support))
1904                         SHMEM2_WR(bp, dcc_support,
1905                                   (SHMEM_DCC_SUPPORT_DISABLE_ENABLE_PF_TLV |
1906                                    SHMEM_DCC_SUPPORT_BANDWIDTH_ALLOCATION_TLV));
1907         }
1908
1909         bp->state = BNX2X_STATE_OPENING_WAIT4_PORT;
1910         rc = bnx2x_func_start(bp);
1911         if (rc) {
1912                 BNX2X_ERR("Function start failed!\n");
1913                 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
1914                 LOAD_ERROR_EXIT(bp, load_error3);
1915         }
1916
1917         /* Send LOAD_DONE command to MCP */
1918         if (!BP_NOMCP(bp)) {
1919                 load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
1920                 if (!load_code) {
1921                         BNX2X_ERR("MCP response failure, aborting\n");
1922                         rc = -EBUSY;
1923                         LOAD_ERROR_EXIT(bp, load_error3);
1924                 }
1925         }
1926
1927         rc = bnx2x_setup_leading(bp);
1928         if (rc) {
1929                 BNX2X_ERR("Setup leading failed!\n");
1930                 LOAD_ERROR_EXIT(bp, load_error3);
1931         }
1932
1933 #ifdef BCM_CNIC
1934         /* Enable Timer scan */
1935         REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + port*4, 1);
1936 #endif
1937
1938         for_each_nondefault_queue(bp, i) {
1939                 rc = bnx2x_setup_queue(bp, &bp->fp[i], 0);
1940                 if (rc) {
1941                         BNX2X_ERR("Queue setup failed\n");
1942                         LOAD_ERROR_EXIT(bp, load_error4);
1943                 }
1944         }
1945
1946         rc = bnx2x_init_rss_pf(bp);
1947         if (rc) {
1948                 BNX2X_ERR("PF RSS init failed\n");
1949                 LOAD_ERROR_EXIT(bp, load_error4);
1950         }
1951
1952         /* Now when Clients are configured we are ready to work */
1953         bp->state = BNX2X_STATE_OPEN;
1954
1955         /* Configure a ucast MAC */
1956         rc = bnx2x_set_eth_mac(bp, true);
1957         if (rc) {
1958                 BNX2X_ERR("Setting Ethernet MAC failed\n");
1959                 LOAD_ERROR_EXIT(bp, load_error4);
1960         }
1961
1962         if (bp->pending_max) {
1963                 bnx2x_update_max_mf_config(bp, bp->pending_max);
1964                 bp->pending_max = 0;
1965         }
1966
1967         if (bp->port.pmf)
1968                 bnx2x_initial_phy_init(bp, load_mode);
1969
1970         /* Start fast path */
1971
1972         /* Initialize Rx filter. */
1973         netif_addr_lock_bh(bp->dev);
1974         bnx2x_set_rx_mode(bp->dev);
1975         netif_addr_unlock_bh(bp->dev);
1976
1977         /* Start the Tx */
1978         switch (load_mode) {
1979         case LOAD_NORMAL:
1980                 /* Tx queue should be only reenabled */
1981                 netif_tx_wake_all_queues(bp->dev);
1982                 break;
1983
1984         case LOAD_OPEN:
1985                 netif_tx_start_all_queues(bp->dev);
1986                 smp_mb__after_clear_bit();
1987                 break;
1988
1989         case LOAD_DIAG:
1990                 bp->state = BNX2X_STATE_DIAG;
1991                 break;
1992
1993         default:
1994                 break;
1995         }
1996
1997         if (bp->port.pmf)
1998                 bnx2x_update_drv_flags(bp, 1 << DRV_FLAGS_DCB_CONFIGURED, 0);
1999         else
2000                 bnx2x__link_status_update(bp);
2001
2002         /* start the timer */
2003         mod_timer(&bp->timer, jiffies + bp->current_interval);
2004
2005 #ifdef BCM_CNIC
2006         /* re-read iscsi info */
2007         bnx2x_get_iscsi_info(bp);
2008         bnx2x_setup_cnic_irq_info(bp);
2009         if (bp->state == BNX2X_STATE_OPEN)
2010                 bnx2x_cnic_notify(bp, CNIC_CTL_START_CMD);
2011 #endif
2012
2013         /* mark driver is loaded in shmem2 */
2014         if (SHMEM2_HAS(bp, drv_capabilities_flag)) {
2015                 u32 val;
2016                 val = SHMEM2_RD(bp, drv_capabilities_flag[BP_FW_MB_IDX(bp)]);
2017                 SHMEM2_WR(bp, drv_capabilities_flag[BP_FW_MB_IDX(bp)],
2018                           val | DRV_FLAGS_CAPABILITIES_LOADED_SUPPORTED |
2019                           DRV_FLAGS_CAPABILITIES_LOADED_L2);
2020         }
2021
2022         /* Wait for all pending SP commands to complete */
2023         if (!bnx2x_wait_sp_comp(bp, ~0x0UL)) {
2024                 BNX2X_ERR("Timeout waiting for SP elements to complete\n");
2025                 bnx2x_nic_unload(bp, UNLOAD_CLOSE);
2026                 return -EBUSY;
2027         }
2028
2029         bnx2x_dcbx_init(bp);
2030         return 0;
2031
2032 #ifndef BNX2X_STOP_ON_ERROR
2033 load_error4:
2034 #ifdef BCM_CNIC
2035         /* Disable Timer scan */
2036         REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + port*4, 0);
2037 #endif
2038 load_error3:
2039         bnx2x_int_disable_sync(bp, 1);
2040
2041         /* Clean queueable objects */
2042         bnx2x_squeeze_objects(bp);
2043
2044         /* Free SKBs, SGEs, TPA pool and driver internals */
2045         bnx2x_free_skbs(bp);
2046         for_each_rx_queue(bp, i)
2047                 bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);
2048
2049         /* Release IRQs */
2050         bnx2x_free_irq(bp);
2051 load_error2:
2052         if (!BP_NOMCP(bp)) {
2053                 bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP, 0);
2054                 bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_DONE, 0);
2055         }
2056
2057         bp->port.pmf = 0;
2058 load_error1:
2059         bnx2x_napi_disable(bp);
2060         /* clear pf_load status, as it was already set */
2061         bnx2x_clear_pf_load(bp);
2062 load_error0:
2063         bnx2x_free_mem(bp);
2064
2065         return rc;
2066 #endif /* ! BNX2X_STOP_ON_ERROR */
2067 }
2068
2069 /* must be called with rtnl_lock */
2070 int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode)
2071 {
2072         int i;
2073         bool global = false;
2074
2075         /* mark driver is unloaded in shmem2 */
2076         if (SHMEM2_HAS(bp, drv_capabilities_flag)) {
2077                 u32 val;
2078                 val = SHMEM2_RD(bp, drv_capabilities_flag[BP_FW_MB_IDX(bp)]);
2079                 SHMEM2_WR(bp, drv_capabilities_flag[BP_FW_MB_IDX(bp)],
2080                           val & ~DRV_FLAGS_CAPABILITIES_LOADED_L2);
2081         }
2082
2083         if ((bp->state == BNX2X_STATE_CLOSED) ||
2084             (bp->state == BNX2X_STATE_ERROR)) {
2085                 /* We can get here if the driver has been unloaded
2086                  * during parity error recovery and is either waiting for a
2087                  * leader to complete or for other functions to unload and
2088                  * then ifdown has been issued. In this case we want to
2089                  * unload and let other functions to complete a recovery
2090                  * process.
2091                  */
2092                 bp->recovery_state = BNX2X_RECOVERY_DONE;
2093                 bp->is_leader = 0;
2094                 bnx2x_release_leader_lock(bp);
2095                 smp_mb();
2096
2097                 DP(NETIF_MSG_IFDOWN, "Releasing a leadership...\n");
2098                 BNX2X_ERR("Can't unload in closed or error state\n");
2099                 return -EINVAL;
2100         }
2101
2102         /*
2103          * It's important to set the bp->state to the value different from
2104          * BNX2X_STATE_OPEN and only then stop the Tx. Otherwise bnx2x_tx_int()
2105          * may restart the Tx from the NAPI context (see bnx2x_tx_int()).
2106          */
2107         bp->state = BNX2X_STATE_CLOSING_WAIT4_HALT;
2108         smp_mb();
2109
2110         /* Stop Tx */
2111         bnx2x_tx_disable(bp);
2112
2113 #ifdef BCM_CNIC
2114         bnx2x_cnic_notify(bp, CNIC_CTL_STOP_CMD);
2115 #endif
2116
2117         bp->rx_mode = BNX2X_RX_MODE_NONE;
2118
2119         del_timer_sync(&bp->timer);
2120
2121         /* Set ALWAYS_ALIVE bit in shmem */
2122         bp->fw_drv_pulse_wr_seq |= DRV_PULSE_ALWAYS_ALIVE;
2123
2124         bnx2x_drv_pulse(bp);
2125
2126         bnx2x_stats_handle(bp, STATS_EVENT_STOP);
2127         bnx2x_save_statistics(bp);
2128
2129         /* Cleanup the chip if needed */
2130         if (unload_mode != UNLOAD_RECOVERY)
2131                 bnx2x_chip_cleanup(bp, unload_mode);
2132         else {
2133                 /* Send the UNLOAD_REQUEST to the MCP */
2134                 bnx2x_send_unload_req(bp, unload_mode);
2135
2136                 /*
2137                  * Prevent transactions to host from the functions on the
2138                  * engine that doesn't reset global blocks in case of global
2139                  * attention once gloabl blocks are reset and gates are opened
2140                  * (the engine which leader will perform the recovery
2141                  * last).
2142                  */
2143                 if (!CHIP_IS_E1x(bp))
2144                         bnx2x_pf_disable(bp);
2145
2146                 /* Disable HW interrupts, NAPI */
2147                 bnx2x_netif_stop(bp, 1);
2148
2149                 /* Release IRQs */
2150                 bnx2x_free_irq(bp);
2151
2152                 /* Report UNLOAD_DONE to MCP */
2153                 bnx2x_send_unload_done(bp);
2154         }
2155
2156         /*
2157          * At this stage no more interrupts will arrive so we may safly clean
2158          * the queueable objects here in case they failed to get cleaned so far.
2159          */
2160         bnx2x_squeeze_objects(bp);
2161
2162         /* There should be no more pending SP commands at this stage */
2163         bp->sp_state = 0;
2164
2165         bp->port.pmf = 0;
2166
2167         /* Free SKBs, SGEs, TPA pool and driver internals */
2168         bnx2x_free_skbs(bp);
2169         for_each_rx_queue(bp, i)
2170                 bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);
2171
2172         bnx2x_free_mem(bp);
2173
2174         bp->state = BNX2X_STATE_CLOSED;
2175
2176         /* Check if there are pending parity attentions. If there are - set
2177          * RECOVERY_IN_PROGRESS.
2178          */
2179         if (bnx2x_chk_parity_attn(bp, &global, false)) {
2180                 bnx2x_set_reset_in_progress(bp);
2181
2182                 /* Set RESET_IS_GLOBAL if needed */
2183                 if (global)
2184                         bnx2x_set_reset_global(bp);
2185         }
2186
2187
2188         /* The last driver must disable a "close the gate" if there is no
2189          * parity attention or "process kill" pending.
2190          */
2191         if (!bnx2x_clear_pf_load(bp) && bnx2x_reset_is_done(bp, BP_PATH(bp)))
2192                 bnx2x_disable_close_the_gate(bp);
2193
2194         return 0;
2195 }
2196
2197 int bnx2x_set_power_state(struct bnx2x *bp, pci_power_t state)
2198 {
2199         u16 pmcsr;
2200
2201         /* If there is no power capability, silently succeed */
2202         if (!bp->pm_cap) {
2203                 BNX2X_DEV_INFO("No power capability. Breaking.\n");
2204                 return 0;
2205         }
2206
2207         pci_read_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL, &pmcsr);
2208
2209         switch (state) {
2210         case PCI_D0:
2211                 pci_write_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL,
2212                                       ((pmcsr & ~PCI_PM_CTRL_STATE_MASK) |
2213                                        PCI_PM_CTRL_PME_STATUS));
2214
2215                 if (pmcsr & PCI_PM_CTRL_STATE_MASK)
2216                         /* delay required during transition out of D3hot */
2217                         msleep(20);
2218                 break;
2219
2220         case PCI_D3hot:
2221                 /* If there are other clients above don't
2222                    shut down the power */
2223                 if (atomic_read(&bp->pdev->enable_cnt) != 1)
2224                         return 0;
2225                 /* Don't shut down the power for emulation and FPGA */
2226                 if (CHIP_REV_IS_SLOW(bp))
2227                         return 0;
2228
2229                 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
2230                 pmcsr |= 3;
2231
2232                 if (bp->wol)
2233                         pmcsr |= PCI_PM_CTRL_PME_ENABLE;
2234
2235                 pci_write_config_word(bp->pdev, bp->pm_cap + PCI_PM_CTRL,
2236                                       pmcsr);
2237
2238                 /* No more memory access after this point until
2239                 * device is brought back to D0.
2240                 */
2241                 break;
2242
2243         default:
2244                 dev_err(&bp->pdev->dev, "Can't support state = %d\n", state);
2245                 return -EINVAL;
2246         }
2247         return 0;
2248 }
2249
2250 /*
2251  * net_device service functions
2252  */
2253 int bnx2x_poll(struct napi_struct *napi, int budget)
2254 {
2255         int work_done = 0;
2256         u8 cos;
2257         struct bnx2x_fastpath *fp = container_of(napi, struct bnx2x_fastpath,
2258                                                  napi);
2259         struct bnx2x *bp = fp->bp;
2260
2261         while (1) {
2262 #ifdef BNX2X_STOP_ON_ERROR
2263                 if (unlikely(bp->panic)) {
2264                         napi_complete(napi);
2265                         return 0;
2266                 }
2267 #endif
2268
2269                 for_each_cos_in_tx_queue(fp, cos)
2270                         if (bnx2x_tx_queue_has_work(&fp->txdata[cos]))
2271                                 bnx2x_tx_int(bp, &fp->txdata[cos]);
2272
2273
2274                 if (bnx2x_has_rx_work(fp)) {
2275                         work_done += bnx2x_rx_int(fp, budget - work_done);
2276
2277                         /* must not complete if we consumed full budget */
2278                         if (work_done >= budget)
2279                                 break;
2280                 }
2281
2282                 /* Fall out from the NAPI loop if needed */
2283                 if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) {
2284 #ifdef BCM_CNIC
2285                         /* No need to update SB for FCoE L2 ring as long as
2286                          * it's connected to the default SB and the SB
2287                          * has been updated when NAPI was scheduled.
2288                          */
2289                         if (IS_FCOE_FP(fp)) {
2290                                 napi_complete(napi);
2291                                 break;
2292                         }
2293 #endif
2294
2295                         bnx2x_update_fpsb_idx(fp);
2296                         /* bnx2x_has_rx_work() reads the status block,
2297                          * thus we need to ensure that status block indices
2298                          * have been actually read (bnx2x_update_fpsb_idx)
2299                          * prior to this check (bnx2x_has_rx_work) so that
2300                          * we won't write the "newer" value of the status block
2301                          * to IGU (if there was a DMA right after
2302                          * bnx2x_has_rx_work and if there is no rmb, the memory
2303                          * reading (bnx2x_update_fpsb_idx) may be postponed
2304                          * to right before bnx2x_ack_sb). In this case there
2305                          * will never be another interrupt until there is
2306                          * another update of the status block, while there
2307                          * is still unhandled work.
2308                          */
2309                         rmb();
2310
2311                         if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) {
2312                                 napi_complete(napi);
2313                                 /* Re-enable interrupts */
2314                                 DP(NETIF_MSG_RX_STATUS,
2315                                    "Update index to %d\n", fp->fp_hc_idx);
2316                                 bnx2x_ack_sb(bp, fp->igu_sb_id, USTORM_ID,
2317                                              le16_to_cpu(fp->fp_hc_idx),
2318                                              IGU_INT_ENABLE, 1);
2319                                 break;
2320                         }
2321                 }
2322         }
2323
2324         return work_done;
2325 }
2326
2327 /* we split the first BD into headers and data BDs
2328  * to ease the pain of our fellow microcode engineers
2329  * we use one mapping for both BDs
2330  * So far this has only been observed to happen
2331  * in Other Operating Systems(TM)
2332  */
2333 static noinline u16 bnx2x_tx_split(struct bnx2x *bp,
2334                                    struct bnx2x_fp_txdata *txdata,
2335                                    struct sw_tx_bd *tx_buf,
2336                                    struct eth_tx_start_bd **tx_bd, u16 hlen,
2337                                    u16 bd_prod, int nbd)
2338 {
2339         struct eth_tx_start_bd *h_tx_bd = *tx_bd;
2340         struct eth_tx_bd *d_tx_bd;
2341         dma_addr_t mapping;
2342         int old_len = le16_to_cpu(h_tx_bd->nbytes);
2343
2344         /* first fix first BD */
2345         h_tx_bd->nbd = cpu_to_le16(nbd);
2346         h_tx_bd->nbytes = cpu_to_le16(hlen);
2347
2348         DP(NETIF_MSG_TX_QUEUED, "TSO split header size is %d (%x:%x) nbd %d\n",
2349            h_tx_bd->nbytes, h_tx_bd->addr_hi, h_tx_bd->addr_lo, h_tx_bd->nbd);
2350
2351         /* now get a new data BD
2352          * (after the pbd) and fill it */
2353         bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
2354         d_tx_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
2355
2356         mapping = HILO_U64(le32_to_cpu(h_tx_bd->addr_hi),
2357                            le32_to_cpu(h_tx_bd->addr_lo)) + hlen;
2358
2359         d_tx_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
2360         d_tx_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
2361         d_tx_bd->nbytes = cpu_to_le16(old_len - hlen);
2362
2363         /* this marks the BD as one that has no individual mapping */
2364         tx_buf->flags |= BNX2X_TSO_SPLIT_BD;
2365
2366         DP(NETIF_MSG_TX_QUEUED,
2367            "TSO split data size is %d (%x:%x)\n",
2368            d_tx_bd->nbytes, d_tx_bd->addr_hi, d_tx_bd->addr_lo);
2369
2370         /* update tx_bd */
2371         *tx_bd = (struct eth_tx_start_bd *)d_tx_bd;
2372
2373         return bd_prod;
2374 }
2375
2376 static inline u16 bnx2x_csum_fix(unsigned char *t_header, u16 csum, s8 fix)
2377 {
2378         if (fix > 0)
2379                 csum = (u16) ~csum_fold(csum_sub(csum,
2380                                 csum_partial(t_header - fix, fix, 0)));
2381
2382         else if (fix < 0)
2383                 csum = (u16) ~csum_fold(csum_add(csum,
2384                                 csum_partial(t_header, -fix, 0)));
2385
2386         return swab16(csum);
2387 }
2388
2389 static inline u32 bnx2x_xmit_type(struct bnx2x *bp, struct sk_buff *skb)
2390 {
2391         u32 rc;
2392
2393         if (skb->ip_summed != CHECKSUM_PARTIAL)
2394                 rc = XMIT_PLAIN;
2395
2396         else {
2397                 if (vlan_get_protocol(skb) == htons(ETH_P_IPV6)) {
2398                         rc = XMIT_CSUM_V6;
2399                         if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2400                                 rc |= XMIT_CSUM_TCP;
2401
2402                 } else {
2403                         rc = XMIT_CSUM_V4;
2404                         if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2405                                 rc |= XMIT_CSUM_TCP;
2406                 }
2407         }
2408
2409         if (skb_is_gso_v6(skb))
2410                 rc |= XMIT_GSO_V6 | XMIT_CSUM_TCP | XMIT_CSUM_V6;
2411         else if (skb_is_gso(skb))
2412                 rc |= XMIT_GSO_V4 | XMIT_CSUM_V4 | XMIT_CSUM_TCP;
2413
2414         return rc;
2415 }
2416
2417 #if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3)
2418 /* check if packet requires linearization (packet is too fragmented)
2419    no need to check fragmentation if page size > 8K (there will be no
2420    violation to FW restrictions) */
2421 static int bnx2x_pkt_req_lin(struct bnx2x *bp, struct sk_buff *skb,
2422                              u32 xmit_type)
2423 {
2424         int to_copy = 0;
2425         int hlen = 0;
2426         int first_bd_sz = 0;
2427
2428         /* 3 = 1 (for linear data BD) + 2 (for PBD and last BD) */
2429         if (skb_shinfo(skb)->nr_frags >= (MAX_FETCH_BD - 3)) {
2430
2431                 if (xmit_type & XMIT_GSO) {
2432                         unsigned short lso_mss = skb_shinfo(skb)->gso_size;
2433                         /* Check if LSO packet needs to be copied:
2434                            3 = 1 (for headers BD) + 2 (for PBD and last BD) */
2435                         int wnd_size = MAX_FETCH_BD - 3;
2436                         /* Number of windows to check */
2437                         int num_wnds = skb_shinfo(skb)->nr_frags - wnd_size;
2438                         int wnd_idx = 0;
2439                         int frag_idx = 0;
2440                         u32 wnd_sum = 0;
2441
2442                         /* Headers length */
2443                         hlen = (int)(skb_transport_header(skb) - skb->data) +
2444                                 tcp_hdrlen(skb);
2445
2446                         /* Amount of data (w/o headers) on linear part of SKB*/
2447                         first_bd_sz = skb_headlen(skb) - hlen;
2448
2449                         wnd_sum  = first_bd_sz;
2450
2451                         /* Calculate the first sum - it's special */
2452                         for (frag_idx = 0; frag_idx < wnd_size - 1; frag_idx++)
2453                                 wnd_sum +=
2454                                         skb_frag_size(&skb_shinfo(skb)->frags[frag_idx]);
2455
2456                         /* If there was data on linear skb data - check it */
2457                         if (first_bd_sz > 0) {
2458                                 if (unlikely(wnd_sum < lso_mss)) {
2459                                         to_copy = 1;
2460                                         goto exit_lbl;
2461                                 }
2462
2463                                 wnd_sum -= first_bd_sz;
2464                         }
2465
2466                         /* Others are easier: run through the frag list and
2467                            check all windows */
2468                         for (wnd_idx = 0; wnd_idx <= num_wnds; wnd_idx++) {
2469                                 wnd_sum +=
2470                           skb_frag_size(&skb_shinfo(skb)->frags[wnd_idx + wnd_size - 1]);
2471
2472                                 if (unlikely(wnd_sum < lso_mss)) {
2473                                         to_copy = 1;
2474                                         break;
2475                                 }
2476                                 wnd_sum -=
2477                                         skb_frag_size(&skb_shinfo(skb)->frags[wnd_idx]);
2478                         }
2479                 } else {
2480                         /* in non-LSO too fragmented packet should always
2481                            be linearized */
2482                         to_copy = 1;
2483                 }
2484         }
2485
2486 exit_lbl:
2487         if (unlikely(to_copy))
2488                 DP(NETIF_MSG_TX_QUEUED,
2489                    "Linearization IS REQUIRED for %s packet. num_frags %d  hlen %d  first_bd_sz %d\n",
2490                    (xmit_type & XMIT_GSO) ? "LSO" : "non-LSO",
2491                    skb_shinfo(skb)->nr_frags, hlen, first_bd_sz);
2492
2493         return to_copy;
2494 }
2495 #endif
2496
2497 static inline void bnx2x_set_pbd_gso_e2(struct sk_buff *skb, u32 *parsing_data,
2498                                         u32 xmit_type)
2499 {
2500         *parsing_data |= (skb_shinfo(skb)->gso_size <<
2501                               ETH_TX_PARSE_BD_E2_LSO_MSS_SHIFT) &
2502                               ETH_TX_PARSE_BD_E2_LSO_MSS;
2503         if ((xmit_type & XMIT_GSO_V6) &&
2504             (ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
2505                 *parsing_data |= ETH_TX_PARSE_BD_E2_IPV6_WITH_EXT_HDR;
2506 }
2507
2508 /**
2509  * bnx2x_set_pbd_gso - update PBD in GSO case.
2510  *
2511  * @skb:        packet skb
2512  * @pbd:        parse BD
2513  * @xmit_type:  xmit flags
2514  */
2515 static inline void bnx2x_set_pbd_gso(struct sk_buff *skb,
2516                                      struct eth_tx_parse_bd_e1x *pbd,
2517                                      u32 xmit_type)
2518 {
2519         pbd->lso_mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
2520         pbd->tcp_send_seq = swab32(tcp_hdr(skb)->seq);
2521         pbd->tcp_flags = pbd_tcp_flags(skb);
2522
2523         if (xmit_type & XMIT_GSO_V4) {
2524                 pbd->ip_id = swab16(ip_hdr(skb)->id);
2525                 pbd->tcp_pseudo_csum =
2526                         swab16(~csum_tcpudp_magic(ip_hdr(skb)->saddr,
2527                                                   ip_hdr(skb)->daddr,
2528                                                   0, IPPROTO_TCP, 0));
2529
2530         } else
2531                 pbd->tcp_pseudo_csum =
2532                         swab16(~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2533                                                 &ipv6_hdr(skb)->daddr,
2534                                                 0, IPPROTO_TCP, 0));
2535
2536         pbd->global_data |= ETH_TX_PARSE_BD_E1X_PSEUDO_CS_WITHOUT_LEN;
2537 }
2538
2539 /**
2540  * bnx2x_set_pbd_csum_e2 - update PBD with checksum and return header length
2541  *
2542  * @bp:                 driver handle
2543  * @skb:                packet skb
2544  * @parsing_data:       data to be updated
2545  * @xmit_type:          xmit flags
2546  *
2547  * 57712 related
2548  */
2549 static inline  u8 bnx2x_set_pbd_csum_e2(struct bnx2x *bp, struct sk_buff *skb,
2550         u32 *parsing_data, u32 xmit_type)
2551 {
2552         *parsing_data |=
2553                         ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) <<
2554                         ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W_SHIFT) &
2555                         ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W;
2556
2557         if (xmit_type & XMIT_CSUM_TCP) {
2558                 *parsing_data |= ((tcp_hdrlen(skb) / 4) <<
2559                         ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW_SHIFT) &
2560                         ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW;
2561
2562                 return skb_transport_header(skb) + tcp_hdrlen(skb) - skb->data;
2563         } else
2564                 /* We support checksum offload for TCP and UDP only.
2565                  * No need to pass the UDP header length - it's a constant.
2566                  */
2567                 return skb_transport_header(skb) +
2568                                 sizeof(struct udphdr) - skb->data;
2569 }
2570
2571 static inline void bnx2x_set_sbd_csum(struct bnx2x *bp, struct sk_buff *skb,
2572         struct eth_tx_start_bd *tx_start_bd, u32 xmit_type)
2573 {
2574         tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_L4_CSUM;
2575
2576         if (xmit_type & XMIT_CSUM_V4)
2577                 tx_start_bd->bd_flags.as_bitfield |=
2578                                         ETH_TX_BD_FLAGS_IP_CSUM;
2579         else
2580                 tx_start_bd->bd_flags.as_bitfield |=
2581                                         ETH_TX_BD_FLAGS_IPV6;
2582
2583         if (!(xmit_type & XMIT_CSUM_TCP))
2584                 tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_IS_UDP;
2585 }
2586
2587 /**
2588  * bnx2x_set_pbd_csum - update PBD with checksum and return header length
2589  *
2590  * @bp:         driver handle
2591  * @skb:        packet skb
2592  * @pbd:        parse BD to be updated
2593  * @xmit_type:  xmit flags
2594  */
2595 static inline u8 bnx2x_set_pbd_csum(struct bnx2x *bp, struct sk_buff *skb,
2596         struct eth_tx_parse_bd_e1x *pbd,
2597         u32 xmit_type)
2598 {
2599         u8 hlen = (skb_network_header(skb) - skb->data) >> 1;
2600
2601         /* for now NS flag is not used in Linux */
2602         pbd->global_data =
2603                 (hlen | ((skb->protocol == cpu_to_be16(ETH_P_8021Q)) <<
2604                          ETH_TX_PARSE_BD_E1X_LLC_SNAP_EN_SHIFT));
2605
2606         pbd->ip_hlen_w = (skb_transport_header(skb) -
2607                         skb_network_header(skb)) >> 1;
2608
2609         hlen += pbd->ip_hlen_w;
2610
2611         /* We support checksum offload for TCP and UDP only */
2612         if (xmit_type & XMIT_CSUM_TCP)
2613                 hlen += tcp_hdrlen(skb) / 2;
2614         else
2615                 hlen += sizeof(struct udphdr) / 2;
2616
2617         pbd->total_hlen_w = cpu_to_le16(hlen);
2618         hlen = hlen*2;
2619
2620         if (xmit_type & XMIT_CSUM_TCP) {
2621                 pbd->tcp_pseudo_csum = swab16(tcp_hdr(skb)->check);
2622
2623         } else {
2624                 s8 fix = SKB_CS_OFF(skb); /* signed! */
2625
2626                 DP(NETIF_MSG_TX_QUEUED,
2627                    "hlen %d  fix %d  csum before fix %x\n",
2628                    le16_to_cpu(pbd->total_hlen_w), fix, SKB_CS(skb));
2629
2630                 /* HW bug: fixup the CSUM */
2631                 pbd->tcp_pseudo_csum =
2632                         bnx2x_csum_fix(skb_transport_header(skb),
2633                                        SKB_CS(skb), fix);
2634
2635                 DP(NETIF_MSG_TX_QUEUED, "csum after fix %x\n",
2636                    pbd->tcp_pseudo_csum);
2637         }
2638
2639         return hlen;
2640 }
2641
2642 /* called with netif_tx_lock
2643  * bnx2x_tx_int() runs without netif_tx_lock unless it needs to call
2644  * netif_wake_queue()
2645  */
2646 netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev)
2647 {
2648         struct bnx2x *bp = netdev_priv(dev);
2649
2650         struct bnx2x_fastpath *fp;
2651         struct netdev_queue *txq;
2652         struct bnx2x_fp_txdata *txdata;
2653         struct sw_tx_bd *tx_buf;
2654         struct eth_tx_start_bd *tx_start_bd, *first_bd;
2655         struct eth_tx_bd *tx_data_bd, *total_pkt_bd = NULL;
2656         struct eth_tx_parse_bd_e1x *pbd_e1x = NULL;
2657         struct eth_tx_parse_bd_e2 *pbd_e2 = NULL;
2658         u32 pbd_e2_parsing_data = 0;
2659         u16 pkt_prod, bd_prod;
2660         int nbd, txq_index, fp_index, txdata_index;
2661         dma_addr_t mapping;
2662         u32 xmit_type = bnx2x_xmit_type(bp, skb);
2663         int i;
2664         u8 hlen = 0;
2665         __le16 pkt_size = 0;
2666         struct ethhdr *eth;
2667         u8 mac_type = UNICAST_ADDRESS;
2668
2669 #ifdef BNX2X_STOP_ON_ERROR
2670         if (unlikely(bp->panic))
2671                 return NETDEV_TX_BUSY;
2672 #endif
2673
2674         txq_index = skb_get_queue_mapping(skb);
2675         txq = netdev_get_tx_queue(dev, txq_index);
2676
2677         BUG_ON(txq_index >= MAX_ETH_TXQ_IDX(bp) + FCOE_PRESENT);
2678
2679         /* decode the fastpath index and the cos index from the txq */
2680         fp_index = TXQ_TO_FP(txq_index);
2681         txdata_index = TXQ_TO_COS(txq_index);
2682
2683 #ifdef BCM_CNIC
2684         /*
2685          * Override the above for the FCoE queue:
2686          *   - FCoE fp entry is right after the ETH entries.
2687          *   - FCoE L2 queue uses bp->txdata[0] only.
2688          */
2689         if (unlikely(!NO_FCOE(bp) && (txq_index ==
2690                                       bnx2x_fcoe_tx(bp, txq_index)))) {
2691                 fp_index = FCOE_IDX;
2692                 txdata_index = 0;
2693         }
2694 #endif
2695
2696         /* enable this debug print to view the transmission queue being used
2697         DP(NETIF_MSG_TX_QUEUED, "indices: txq %d, fp %d, txdata %d\n",
2698            txq_index, fp_index, txdata_index); */
2699
2700         /* locate the fastpath and the txdata */
2701         fp = &bp->fp[fp_index];
2702         txdata = &fp->txdata[txdata_index];
2703
2704         /* enable this debug print to view the tranmission details
2705         DP(NETIF_MSG_TX_QUEUED,
2706            "transmitting packet cid %d fp index %d txdata_index %d tx_data ptr %p fp pointer %p\n",
2707            txdata->cid, fp_index, txdata_index, txdata, fp); */
2708
2709         if (unlikely(bnx2x_tx_avail(bp, txdata) <
2710                      (skb_shinfo(skb)->nr_frags + 3))) {
2711                 fp->eth_q_stats.driver_xoff++;
2712                 netif_tx_stop_queue(txq);
2713                 BNX2X_ERR("BUG! Tx ring full when queue awake!\n");
2714                 return NETDEV_TX_BUSY;
2715         }
2716
2717         DP(NETIF_MSG_TX_QUEUED,
2718            "queue[%d]: SKB: summed %x  protocol %x protocol(%x,%x) gso type %x  xmit_type %x\n",
2719            txq_index, skb->ip_summed, skb->protocol, ipv6_hdr(skb)->nexthdr,
2720            ip_hdr(skb)->protocol, skb_shinfo(skb)->gso_type, xmit_type);
2721
2722         eth = (struct ethhdr *)skb->data;
2723
2724         /* set flag according to packet type (UNICAST_ADDRESS is default)*/
2725         if (unlikely(is_multicast_ether_addr(eth->h_dest))) {
2726                 if (is_broadcast_ether_addr(eth->h_dest))
2727                         mac_type = BROADCAST_ADDRESS;
2728                 else
2729                         mac_type = MULTICAST_ADDRESS;
2730         }
2731
2732 #if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3)
2733         /* First, check if we need to linearize the skb (due to FW
2734            restrictions). No need to check fragmentation if page size > 8K
2735            (there will be no violation to FW restrictions) */
2736         if (bnx2x_pkt_req_lin(bp, skb, xmit_type)) {
2737                 /* Statistics of linearization */
2738                 bp->lin_cnt++;
2739                 if (skb_linearize(skb) != 0) {
2740                         DP(NETIF_MSG_TX_QUEUED,
2741                            "SKB linearization failed - silently dropping this SKB\n");
2742                         dev_kfree_skb_any(skb);
2743                         return NETDEV_TX_OK;
2744                 }
2745         }
2746 #endif
2747         /* Map skb linear data for DMA */
2748         mapping = dma_map_single(&bp->pdev->dev, skb->data,
2749                                  skb_headlen(skb), DMA_TO_DEVICE);
2750         if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
2751                 DP(NETIF_MSG_TX_QUEUED,
2752                    "SKB mapping failed - silently dropping this SKB\n");
2753                 dev_kfree_skb_any(skb);
2754                 return NETDEV_TX_OK;
2755         }
2756         /*
2757         Please read carefully. First we use one BD which we mark as start,
2758         then we have a parsing info BD (used for TSO or xsum),
2759         and only then we have the rest of the TSO BDs.
2760         (don't forget to mark the last one as last,
2761         and to unmap only AFTER you write to the BD ...)
2762         And above all, all pdb sizes are in words - NOT DWORDS!
2763         */
2764
2765         /* get current pkt produced now - advance it just before sending packet
2766          * since mapping of pages may fail and cause packet to be dropped
2767          */
2768         pkt_prod = txdata->tx_pkt_prod;
2769         bd_prod = TX_BD(txdata->tx_bd_prod);
2770
2771         /* get a tx_buf and first BD
2772          * tx_start_bd may be changed during SPLIT,
2773          * but first_bd will always stay first
2774          */
2775         tx_buf = &txdata->tx_buf_ring[TX_BD(pkt_prod)];
2776         tx_start_bd = &txdata->tx_desc_ring[bd_prod].start_bd;
2777         first_bd = tx_start_bd;
2778
2779         tx_start_bd->bd_flags.as_bitfield = ETH_TX_BD_FLAGS_START_BD;
2780         SET_FLAG(tx_start_bd->general_data, ETH_TX_START_BD_ETH_ADDR_TYPE,
2781                  mac_type);
2782
2783         /* header nbd */
2784         SET_FLAG(tx_start_bd->general_data, ETH_TX_START_BD_HDR_NBDS, 1);
2785
2786         /* remember the first BD of the packet */
2787         tx_buf->first_bd = txdata->tx_bd_prod;
2788         tx_buf->skb = skb;
2789         tx_buf->flags = 0;
2790
2791         DP(NETIF_MSG_TX_QUEUED,
2792            "sending pkt %u @%p  next_idx %u  bd %u @%p\n",
2793            pkt_prod, tx_buf, txdata->tx_pkt_prod, bd_prod, tx_start_bd);
2794
2795         if (vlan_tx_tag_present(skb)) {
2796                 tx_start_bd->vlan_or_ethertype =
2797                     cpu_to_le16(vlan_tx_tag_get(skb));
2798                 tx_start_bd->bd_flags.as_bitfield |=
2799                     (X_ETH_OUTBAND_VLAN << ETH_TX_BD_FLAGS_VLAN_MODE_SHIFT);
2800         } else
2801                 tx_start_bd->vlan_or_ethertype = cpu_to_le16(pkt_prod);
2802
2803         /* turn on parsing and get a BD */
2804         bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
2805
2806         if (xmit_type & XMIT_CSUM)
2807                 bnx2x_set_sbd_csum(bp, skb, tx_start_bd, xmit_type);
2808
2809         if (!CHIP_IS_E1x(bp)) {
2810                 pbd_e2 = &txdata->tx_desc_ring[bd_prod].parse_bd_e2;
2811                 memset(pbd_e2, 0, sizeof(struct eth_tx_parse_bd_e2));
2812                 /* Set PBD in checksum offload case */
2813                 if (xmit_type & XMIT_CSUM)
2814                         hlen = bnx2x_set_pbd_csum_e2(bp, skb,
2815                                                      &pbd_e2_parsing_data,
2816                                                      xmit_type);
2817                 if (IS_MF_SI(bp)) {
2818                         /*
2819                          * fill in the MAC addresses in the PBD - for local
2820                          * switching
2821                          */
2822                         bnx2x_set_fw_mac_addr(&pbd_e2->src_mac_addr_hi,
2823                                               &pbd_e2->src_mac_addr_mid,
2824                                               &pbd_e2->src_mac_addr_lo,
2825                                               eth->h_source);
2826                         bnx2x_set_fw_mac_addr(&pbd_e2->dst_mac_addr_hi,
2827                                               &pbd_e2->dst_mac_addr_mid,
2828                                               &pbd_e2->dst_mac_addr_lo,
2829                                               eth->h_dest);
2830                 }
2831         } else {
2832                 pbd_e1x = &txdata->tx_desc_ring[bd_prod].parse_bd_e1x;
2833                 memset(pbd_e1x, 0, sizeof(struct eth_tx_parse_bd_e1x));
2834                 /* Set PBD in checksum offload case */
2835                 if (xmit_type & XMIT_CSUM)
2836                         hlen = bnx2x_set_pbd_csum(bp, skb, pbd_e1x, xmit_type);
2837
2838         }
2839
2840         /* Setup the data pointer of the first BD of the packet */
2841         tx_start_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
2842         tx_start_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
2843         nbd = 2; /* start_bd + pbd + frags (updated when pages are mapped) */
2844         tx_start_bd->nbytes = cpu_to_le16(skb_headlen(skb));
2845         pkt_size = tx_start_bd->nbytes;
2846
2847         DP(NETIF_MSG_TX_QUEUED,
2848            "first bd @%p  addr (%x:%x)  nbd %d  nbytes %d  flags %x  vlan %x\n",
2849            tx_start_bd, tx_start_bd->addr_hi, tx_start_bd->addr_lo,
2850            le16_to_cpu(tx_start_bd->nbd), le16_to_cpu(tx_start_bd->nbytes),
2851            tx_start_bd->bd_flags.as_bitfield,
2852            le16_to_cpu(tx_start_bd->vlan_or_ethertype));
2853
2854         if (xmit_type & XMIT_GSO) {
2855
2856                 DP(NETIF_MSG_TX_QUEUED,
2857                    "TSO packet len %d  hlen %d  total len %d  tso size %d\n",
2858                    skb->len, hlen, skb_headlen(skb),
2859                    skb_shinfo(skb)->gso_size);
2860
2861                 tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_SW_LSO;
2862
2863                 if (unlikely(skb_headlen(skb) > hlen))
2864                         bd_prod = bnx2x_tx_split(bp, txdata, tx_buf,
2865                                                  &tx_start_bd, hlen,
2866                                                  bd_prod, ++nbd);
2867                 if (!CHIP_IS_E1x(bp))
2868                         bnx2x_set_pbd_gso_e2(skb, &pbd_e2_parsing_data,
2869                                              xmit_type);
2870                 else
2871                         bnx2x_set_pbd_gso(skb, pbd_e1x, xmit_type);
2872         }
2873
2874         /* Set the PBD's parsing_data field if not zero
2875          * (for the chips newer than 57711).
2876          */
2877         if (pbd_e2_parsing_data)
2878                 pbd_e2->parsing_data = cpu_to_le32(pbd_e2_parsing_data);
2879
2880         tx_data_bd = (struct eth_tx_bd *)tx_start_bd;
2881
2882         /* Handle fragmented skb */
2883         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2884                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2885
2886                 mapping = skb_frag_dma_map(&bp->pdev->dev, frag, 0,
2887                                            skb_frag_size(frag), DMA_TO_DEVICE);
2888                 if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
2889                         unsigned int pkts_compl = 0, bytes_compl = 0;
2890
2891                         DP(NETIF_MSG_TX_QUEUED,
2892                            "Unable to map page - dropping packet...\n");
2893
2894                         /* we need unmap all buffers already mapped
2895                          * for this SKB;
2896                          * first_bd->nbd need to be properly updated
2897                          * before call to bnx2x_free_tx_pkt
2898                          */
2899                         first_bd->nbd = cpu_to_le16(nbd);
2900                         bnx2x_free_tx_pkt(bp, txdata,
2901                                           TX_BD(txdata->tx_pkt_prod),
2902                                           &pkts_compl, &bytes_compl);
2903                         return NETDEV_TX_OK;
2904                 }
2905
2906                 bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
2907                 tx_data_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
2908                 if (total_pkt_bd == NULL)
2909                         total_pkt_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
2910
2911                 tx_data_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
2912                 tx_data_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
2913                 tx_data_bd->nbytes = cpu_to_le16(skb_frag_size(frag));
2914                 le16_add_cpu(&pkt_size, skb_frag_size(frag));
2915                 nbd++;
2916
2917                 DP(NETIF_MSG_TX_QUEUED,
2918                    "frag %d  bd @%p  addr (%x:%x)  nbytes %d\n",
2919                    i, tx_data_bd, tx_data_bd->addr_hi, tx_data_bd->addr_lo,
2920                    le16_to_cpu(tx_data_bd->nbytes));
2921         }
2922
2923         DP(NETIF_MSG_TX_QUEUED, "last bd @%p\n", tx_data_bd);
2924
2925         /* update with actual num BDs */
2926         first_bd->nbd = cpu_to_le16(nbd);
2927
2928         bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
2929
2930         /* now send a tx doorbell, counting the next BD
2931          * if the packet contains or ends with it
2932          */
2933         if (TX_BD_POFF(bd_prod) < nbd)
2934                 nbd++;
2935
2936         /* total_pkt_bytes should be set on the first data BD if
2937          * it's not an LSO packet and there is more than one
2938          * data BD. In this case pkt_size is limited by an MTU value.
2939          * However we prefer to set it for an LSO packet (while we don't
2940          * have to) in order to save some CPU cycles in a none-LSO
2941          * case, when we much more care about them.
2942          */
2943         if (total_pkt_bd != NULL)
2944                 total_pkt_bd->total_pkt_bytes = pkt_size;
2945
2946         if (pbd_e1x)
2947                 DP(NETIF_MSG_TX_QUEUED,
2948                    "PBD (E1X) @%p  ip_data %x  ip_hlen %u  ip_id %u  lso_mss %u  tcp_flags %x  xsum %x  seq %u  hlen %u\n",
2949                    pbd_e1x, pbd_e1x->global_data, pbd_e1x->ip_hlen_w,
2950                    pbd_e1x->ip_id, pbd_e1x->lso_mss, pbd_e1x->tcp_flags,
2951                    pbd_e1x->tcp_pseudo_csum, pbd_e1x->tcp_send_seq,
2952                     le16_to_cpu(pbd_e1x->total_hlen_w));
2953         if (pbd_e2)
2954                 DP(NETIF_MSG_TX_QUEUED,
2955                    "PBD (E2) @%p  dst %x %x %x src %x %x %x parsing_data %x\n",
2956                    pbd_e2, pbd_e2->dst_mac_addr_hi, pbd_e2->dst_mac_addr_mid,
2957                    pbd_e2->dst_mac_addr_lo, pbd_e2->src_mac_addr_hi,
2958                    pbd_e2->src_mac_addr_mid, pbd_e2->src_mac_addr_lo,
2959                    pbd_e2->parsing_data);
2960         DP(NETIF_MSG_TX_QUEUED, "doorbell: nbd %d  bd %u\n", nbd, bd_prod);
2961
2962         netdev_tx_sent_queue(txq, skb->len);
2963
2964         txdata->tx_pkt_prod++;
2965         /*
2966          * Make sure that the BD data is updated before updating the producer
2967          * since FW might read the BD right after the producer is updated.
2968          * This is only applicable for weak-ordered memory model archs such
2969          * as IA-64. The following barrier is also mandatory since FW will
2970          * assumes packets must have BDs.
2971          */
2972         wmb();
2973
2974         txdata->tx_db.data.prod += nbd;
2975         barrier();
2976
2977         DOORBELL(bp, txdata->cid, txdata->tx_db.raw);
2978
2979         mmiowb();
2980
2981         txdata->tx_bd_prod += nbd;
2982
2983         if (unlikely(bnx2x_tx_avail(bp, txdata) < MAX_SKB_FRAGS + 3)) {
2984                 netif_tx_stop_queue(txq);
2985
2986                 /* paired memory barrier is in bnx2x_tx_int(), we have to keep
2987                  * ordering of set_bit() in netif_tx_stop_queue() and read of
2988                  * fp->bd_tx_cons */
2989                 smp_mb();
2990
2991                 fp->eth_q_stats.driver_xoff++;
2992                 if (bnx2x_tx_avail(bp, txdata) >= MAX_SKB_FRAGS + 3)
2993                         netif_tx_wake_queue(txq);
2994         }
2995         txdata->tx_pkt++;
2996
2997         return NETDEV_TX_OK;
2998 }
2999
3000 /**
3001  * bnx2x_setup_tc - routine to configure net_device for multi tc
3002  *
3003  * @netdev: net device to configure
3004  * @tc: number of traffic classes to enable
3005  *
3006  * callback connected to the ndo_setup_tc function pointer
3007  */
3008 int bnx2x_setup_tc(struct net_device *dev, u8 num_tc)
3009 {
3010         int cos, prio, count, offset;
3011         struct bnx2x *bp = netdev_priv(dev);
3012
3013         /* setup tc must be called under rtnl lock */
3014         ASSERT_RTNL();
3015
3016         /* no traffic classes requested. aborting */
3017         if (!num_tc) {
3018                 netdev_reset_tc(dev);
3019                 return 0;
3020         }
3021
3022         /* requested to support too many traffic classes */
3023         if (num_tc > bp->max_cos) {
3024                 BNX2X_ERR("support for too many traffic classes requested: %d. max supported is %d\n",
3025                           num_tc, bp->max_cos);
3026                 return -EINVAL;
3027         }
3028
3029         /* declare amount of supported traffic classes */
3030         if (netdev_set_num_tc(dev, num_tc)) {
3031                 BNX2X_ERR("failed to declare %d traffic classes\n", num_tc);
3032                 return -EINVAL;
3033         }
3034
3035         /* configure priority to traffic class mapping */
3036         for (prio = 0; prio < BNX2X_MAX_PRIORITY; prio++) {
3037                 netdev_set_prio_tc_map(dev, prio, bp->prio_to_cos[prio]);
3038                 DP(BNX2X_MSG_SP | NETIF_MSG_IFUP,
3039                    "mapping priority %d to tc %d\n",
3040                    prio, bp->prio_to_cos[prio]);
3041         }
3042
3043
3044         /* Use this configuration to diffrentiate tc0 from other COSes
3045            This can be used for ets or pfc, and save the effort of setting
3046            up a multio class queue disc or negotiating DCBX with a switch
3047         netdev_set_prio_tc_map(dev, 0, 0);
3048         DP(BNX2X_MSG_SP, "mapping priority %d to tc %d\n", 0, 0);
3049         for (prio = 1; prio < 16; prio++) {
3050                 netdev_set_prio_tc_map(dev, prio, 1);
3051                 DP(BNX2X_MSG_SP, "mapping priority %d to tc %d\n", prio, 1);
3052         } */
3053
3054         /* configure traffic class to transmission queue mapping */
3055         for (cos = 0; cos < bp->max_cos; cos++) {
3056                 count = BNX2X_NUM_ETH_QUEUES(bp);
3057                 offset = cos * MAX_TXQS_PER_COS;
3058                 netdev_set_tc_queue(dev, cos, count, offset);
3059                 DP(BNX2X_MSG_SP | NETIF_MSG_IFUP,
3060                    "mapping tc %d to offset %d count %d\n",
3061                    cos, offset, count);
3062         }
3063
3064         return 0;
3065 }
3066
3067 /* called with rtnl_lock */
3068 int bnx2x_change_mac_addr(struct net_device *dev, void *p)
3069 {
3070         struct sockaddr *addr = p;
3071         struct bnx2x *bp = netdev_priv(dev);
3072         int rc = 0;
3073
3074         if (!bnx2x_is_valid_ether_addr(bp, addr->sa_data)) {
3075                 BNX2X_ERR("Requested MAC address is not valid\n");
3076                 return -EINVAL;
3077         }
3078
3079 #ifdef BCM_CNIC
3080         if (IS_MF_STORAGE_SD(bp) && !is_zero_ether_addr(addr->sa_data)) {
3081                 BNX2X_ERR("Can't configure non-zero address on iSCSI or FCoE functions in MF-SD mode\n");
3082                 return -EINVAL;
3083         }
3084 #endif
3085
3086         if (netif_running(dev))  {
3087                 rc = bnx2x_set_eth_mac(bp, false);
3088                 if (rc)
3089                         return rc;
3090         }
3091
3092         dev->addr_assign_type &= ~NET_ADDR_RANDOM;
3093         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
3094
3095         if (netif_running(dev))
3096                 rc = bnx2x_set_eth_mac(bp, true);
3097
3098         return rc;
3099 }
3100
3101 static void bnx2x_free_fp_mem_at(struct bnx2x *bp, int fp_index)
3102 {
3103         union host_hc_status_block *sb = &bnx2x_fp(bp, fp_index, status_blk);
3104         struct bnx2x_fastpath *fp = &bp->fp[fp_index];
3105         u8 cos;
3106
3107         /* Common */
3108 #ifdef BCM_CNIC
3109         if (IS_FCOE_IDX(fp_index)) {
3110                 memset(sb, 0, sizeof(union host_hc_status_block));
3111                 fp->status_blk_mapping = 0;
3112
3113         } else {
3114 #endif
3115                 /* status blocks */
3116                 if (!CHIP_IS_E1x(bp))
3117                         BNX2X_PCI_FREE(sb->e2_sb,
3118                                        bnx2x_fp(bp, fp_index,
3119                                                 status_blk_mapping),
3120                                        sizeof(struct host_hc_status_block_e2));
3121                 else
3122                         BNX2X_PCI_FREE(sb->e1x_sb,
3123                                        bnx2x_fp(bp, fp_index,
3124                                                 status_blk_mapping),
3125                                        sizeof(struct host_hc_status_block_e1x));
3126 #ifdef BCM_CNIC
3127         }
3128 #endif
3129         /* Rx */
3130         if (!skip_rx_queue(bp, fp_index)) {
3131                 bnx2x_free_rx_bds(fp);
3132
3133                 /* fastpath rx rings: rx_buf rx_desc rx_comp */
3134                 BNX2X_FREE(bnx2x_fp(bp, fp_index, rx_buf_ring));
3135                 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_desc_ring),
3136                                bnx2x_fp(bp, fp_index, rx_desc_mapping),
3137                                sizeof(struct eth_rx_bd) * NUM_RX_BD);
3138
3139                 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_comp_ring),
3140                                bnx2x_fp(bp, fp_index, rx_comp_mapping),
3141                                sizeof(struct eth_fast_path_rx_cqe) *
3142                                NUM_RCQ_BD);
3143
3144                 /* SGE ring */
3145                 BNX2X_FREE(bnx2x_fp(bp, fp_index, rx_page_ring));
3146                 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_sge_ring),
3147                                bnx2x_fp(bp, fp_index, rx_sge_mapping),
3148                                BCM_PAGE_SIZE * NUM_RX_SGE_PAGES);
3149         }
3150
3151         /* Tx */
3152         if (!skip_tx_queue(bp, fp_index)) {
3153                 /* fastpath tx rings: tx_buf tx_desc */
3154                 for_each_cos_in_tx_queue(fp, cos) {
3155                         struct bnx2x_fp_txdata *txdata = &fp->txdata[cos];
3156
3157                         DP(NETIF_MSG_IFDOWN,
3158                            "freeing tx memory of fp %d cos %d cid %d\n",
3159                            fp_index, cos, txdata->cid);
3160
3161                         BNX2X_FREE(txdata->tx_buf_ring);
3162                         BNX2X_PCI_FREE(txdata->tx_desc_ring,
3163                                 txdata->tx_desc_mapping,
3164                                 sizeof(union eth_tx_bd_types) * NUM_TX_BD);
3165                 }
3166         }
3167         /* end of fastpath */
3168 }
3169
3170 void bnx2x_free_fp_mem(struct bnx2x *bp)
3171 {
3172         int i;
3173         for_each_queue(bp, i)
3174                 bnx2x_free_fp_mem_at(bp, i);
3175 }
3176
3177 static inline void set_sb_shortcuts(struct bnx2x *bp, int index)
3178 {
3179         union host_hc_status_block status_blk = bnx2x_fp(bp, index, status_blk);
3180         if (!CHIP_IS_E1x(bp)) {
3181                 bnx2x_fp(bp, index, sb_index_values) =
3182                         (__le16 *)status_blk.e2_sb->sb.index_values;
3183                 bnx2x_fp(bp, index, sb_running_index) =
3184                         (__le16 *)status_blk.e2_sb->sb.running_index;
3185         } else {
3186                 bnx2x_fp(bp, index, sb_index_values) =
3187                         (__le16 *)status_blk.e1x_sb->sb.index_values;
3188                 bnx2x_fp(bp, index, sb_running_index) =
3189                         (__le16 *)status_blk.e1x_sb->sb.running_index;
3190         }
3191 }
3192
3193 static int bnx2x_alloc_fp_mem_at(struct bnx2x *bp, int index)
3194 {
3195         union host_hc_status_block *sb;
3196         struct bnx2x_fastpath *fp = &bp->fp[index];
3197         int ring_size = 0;
3198         u8 cos;
3199         int rx_ring_size = 0;
3200
3201 #ifdef BCM_CNIC
3202         if (!bp->rx_ring_size && IS_MF_STORAGE_SD(bp)) {
3203                 rx_ring_size = MIN_RX_SIZE_NONTPA;
3204                 bp->rx_ring_size = rx_ring_size;
3205         } else
3206 #endif
3207         if (!bp->rx_ring_size) {
3208                 u32 cfg = SHMEM_RD(bp,
3209                              dev_info.port_hw_config[BP_PORT(bp)].default_cfg);
3210
3211                 rx_ring_size = MAX_RX_AVAIL/BNX2X_NUM_RX_QUEUES(bp);
3212
3213                 /* Dercease ring size for 1G functions */
3214                 if ((cfg & PORT_HW_CFG_NET_SERDES_IF_MASK) ==
3215                     PORT_HW_CFG_NET_SERDES_IF_SGMII)
3216                         rx_ring_size /= 10;
3217
3218                 /* allocate at least number of buffers required by FW */
3219                 rx_ring_size = max_t(int, bp->disable_tpa ? MIN_RX_SIZE_NONTPA :
3220                                      MIN_RX_SIZE_TPA, rx_ring_size);
3221
3222                 bp->rx_ring_size = rx_ring_size;
3223         } else /* if rx_ring_size specified - use it */
3224                 rx_ring_size = bp->rx_ring_size;
3225
3226         /* Common */
3227         sb = &bnx2x_fp(bp, index, status_blk);
3228 #ifdef BCM_CNIC
3229         if (!IS_FCOE_IDX(index)) {
3230 #endif
3231                 /* status blocks */
3232                 if (!CHIP_IS_E1x(bp))
3233                         BNX2X_PCI_ALLOC(sb->e2_sb,
3234                                 &bnx2x_fp(bp, index, status_blk_mapping),
3235                                 sizeof(struct host_hc_status_block_e2));
3236                 else
3237                         BNX2X_PCI_ALLOC(sb->e1x_sb,
3238                                 &bnx2x_fp(bp, index, status_blk_mapping),
3239                             sizeof(struct host_hc_status_block_e1x));
3240 #ifdef BCM_CNIC
3241         }
3242 #endif
3243
3244         /* FCoE Queue uses Default SB and doesn't ACK the SB, thus no need to
3245          * set shortcuts for it.
3246          */
3247         if (!IS_FCOE_IDX(index))
3248                 set_sb_shortcuts(bp, index);
3249
3250         /* Tx */
3251         if (!skip_tx_queue(bp, index)) {
3252                 /* fastpath tx rings: tx_buf tx_desc */
3253                 for_each_cos_in_tx_queue(fp, cos) {
3254                         struct bnx2x_fp_txdata *txdata = &fp->txdata[cos];
3255
3256                         DP(NETIF_MSG_IFUP,
3257                            "allocating tx memory of fp %d cos %d\n",
3258                            index, cos);
3259
3260                         BNX2X_ALLOC(txdata->tx_buf_ring,
3261                                 sizeof(struct sw_tx_bd) * NUM_TX_BD);
3262                         BNX2X_PCI_ALLOC(txdata->tx_desc_ring,
3263                                 &txdata->tx_desc_mapping,
3264                                 sizeof(union eth_tx_bd_types) * NUM_TX_BD);
3265                 }
3266         }
3267
3268         /* Rx */
3269         if (!skip_rx_queue(bp, index)) {
3270                 /* fastpath rx rings: rx_buf rx_desc rx_comp */
3271                 BNX2X_ALLOC(bnx2x_fp(bp, index, rx_buf_ring),
3272                                 sizeof(struct sw_rx_bd) * NUM_RX_BD);
3273                 BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_desc_ring),
3274                                 &bnx2x_fp(bp, index, rx_desc_mapping),
3275                                 sizeof(struct eth_rx_bd) * NUM_RX_BD);
3276
3277                 BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_comp_ring),
3278                                 &bnx2x_fp(bp, index, rx_comp_mapping),
3279                                 sizeof(struct eth_fast_path_rx_cqe) *
3280                                 NUM_RCQ_BD);
3281
3282                 /* SGE ring */
3283                 BNX2X_ALLOC(bnx2x_fp(bp, index, rx_page_ring),
3284                                 sizeof(struct sw_rx_page) * NUM_RX_SGE);
3285                 BNX2X_PCI_ALLOC(bnx2x_fp(bp, index, rx_sge_ring),
3286                                 &bnx2x_fp(bp, index, rx_sge_mapping),
3287                                 BCM_PAGE_SIZE * NUM_RX_SGE_PAGES);
3288                 /* RX BD ring */
3289                 bnx2x_set_next_page_rx_bd(fp);
3290
3291                 /* CQ ring */
3292                 bnx2x_set_next_page_rx_cq(fp);
3293
3294                 /* BDs */
3295                 ring_size = bnx2x_alloc_rx_bds(fp, rx_ring_size);
3296                 if (ring_size < rx_ring_size)
3297                         goto alloc_mem_err;
3298         }
3299
3300         return 0;
3301
3302 /* handles low memory cases */
3303 alloc_mem_err:
3304         BNX2X_ERR("Unable to allocate full memory for queue %d (size %d)\n",
3305                                                 index, ring_size);
3306         /* FW will drop all packets if queue is not big enough,
3307          * In these cases we disable the queue
3308          * Min size is different for OOO, TPA and non-TPA queues
3309          */
3310         if (ring_size < (fp->disable_tpa ?
3311                                 MIN_RX_SIZE_NONTPA : MIN_RX_SIZE_TPA)) {
3312                         /* release memory allocated for this queue */
3313                         bnx2x_free_fp_mem_at(bp, index);
3314                         return -ENOMEM;
3315         }
3316         return 0;
3317 }
3318
3319 int bnx2x_alloc_fp_mem(struct bnx2x *bp)
3320 {
3321         int i;
3322
3323         /**
3324          * 1. Allocate FP for leading - fatal if error
3325          * 2. {CNIC} Allocate FCoE FP - fatal if error
3326          * 3. {CNIC} Allocate OOO + FWD - disable OOO if error
3327          * 4. Allocate RSS - fix number of queues if error
3328          */
3329
3330         /* leading */
3331         if (bnx2x_alloc_fp_mem_at(bp, 0))
3332                 return -ENOMEM;
3333
3334 #ifdef BCM_CNIC
3335         if (!NO_FCOE(bp))
3336                 /* FCoE */
3337                 if (bnx2x_alloc_fp_mem_at(bp, FCOE_IDX))
3338                         /* we will fail load process instead of mark
3339                          * NO_FCOE_FLAG
3340                          */
3341                         return -ENOMEM;
3342 #endif
3343
3344         /* RSS */
3345         for_each_nondefault_eth_queue(bp, i)
3346                 if (bnx2x_alloc_fp_mem_at(bp, i))
3347                         break;
3348
3349         /* handle memory failures */
3350         if (i != BNX2X_NUM_ETH_QUEUES(bp)) {
3351                 int delta = BNX2X_NUM_ETH_QUEUES(bp) - i;
3352
3353                 WARN_ON(delta < 0);
3354 #ifdef BCM_CNIC
3355                 /**
3356                  * move non eth FPs next to last eth FP
3357                  * must be done in that order
3358                  * FCOE_IDX < FWD_IDX < OOO_IDX
3359                  */
3360
3361                 /* move FCoE fp even NO_FCOE_FLAG is on */
3362                 bnx2x_move_fp(bp, FCOE_IDX, FCOE_IDX - delta);
3363 #endif
3364                 bp->num_queues -= delta;
3365                 BNX2X_ERR("Adjusted num of queues from %d to %d\n",
3366                           bp->num_queues + delta, bp->num_queues);
3367         }
3368
3369         return 0;
3370 }
3371
3372 void bnx2x_free_mem_bp(struct bnx2x *bp)
3373 {
3374         kfree(bp->fp);
3375         kfree(bp->msix_table);
3376         kfree(bp->ilt);
3377 }
3378
3379 int __devinit bnx2x_alloc_mem_bp(struct bnx2x *bp)
3380 {
3381         struct bnx2x_fastpath *fp;
3382         struct msix_entry *tbl;
3383         struct bnx2x_ilt *ilt;
3384         int msix_table_size = 0;
3385
3386         /*
3387          * The biggest MSI-X table we might need is as a maximum number of fast
3388          * path IGU SBs plus default SB (for PF).
3389          */
3390         msix_table_size = bp->igu_sb_cnt + 1;
3391
3392         /* fp array: RSS plus CNIC related L2 queues */
3393         fp = kcalloc(BNX2X_MAX_RSS_COUNT(bp) + NON_ETH_CONTEXT_USE,
3394                      sizeof(*fp), GFP_KERNEL);
3395         if (!fp)
3396                 goto alloc_err;
3397         bp->fp = fp;
3398
3399         /* msix table */
3400         tbl = kcalloc(msix_table_size, sizeof(*tbl), GFP_KERNEL);
3401         if (!tbl)
3402                 goto alloc_err;
3403         bp->msix_table = tbl;
3404
3405         /* ilt */
3406         ilt = kzalloc(sizeof(*ilt), GFP_KERNEL);
3407         if (!ilt)
3408                 goto alloc_err;
3409         bp->ilt = ilt;
3410
3411         return 0;
3412 alloc_err:
3413         bnx2x_free_mem_bp(bp);
3414         return -ENOMEM;
3415
3416 }
3417
3418 int bnx2x_reload_if_running(struct net_device *dev)
3419 {
3420         struct bnx2x *bp = netdev_priv(dev);
3421
3422         if (unlikely(!netif_running(dev)))
3423                 return 0;
3424
3425         bnx2x_nic_unload(bp, UNLOAD_NORMAL);
3426         return bnx2x_nic_load(bp, LOAD_NORMAL);
3427 }
3428
3429 int bnx2x_get_cur_phy_idx(struct bnx2x *bp)
3430 {
3431         u32 sel_phy_idx = 0;
3432         if (bp->link_params.num_phys <= 1)
3433                 return INT_PHY;
3434
3435         if (bp->link_vars.link_up) {
3436                 sel_phy_idx = EXT_PHY1;
3437                 /* In case link is SERDES, check if the EXT_PHY2 is the one */
3438                 if ((bp->link_vars.link_status & LINK_STATUS_SERDES_LINK) &&
3439                     (bp->link_params.phy[EXT_PHY2].supported & SUPPORTED_FIBRE))
3440                         sel_phy_idx = EXT_PHY2;
3441         } else {
3442
3443                 switch (bnx2x_phy_selection(&bp->link_params)) {
3444                 case PORT_HW_CFG_PHY_SELECTION_HARDWARE_DEFAULT:
3445                 case PORT_HW_CFG_PHY_SELECTION_FIRST_PHY:
3446                 case PORT_HW_CFG_PHY_SELECTION_FIRST_PHY_PRIORITY:
3447                        sel_phy_idx = EXT_PHY1;
3448                        break;
3449                 case PORT_HW_CFG_PHY_SELECTION_SECOND_PHY:
3450                 case PORT_HW_CFG_PHY_SELECTION_SECOND_PHY_PRIORITY:
3451                        sel_phy_idx = EXT_PHY2;
3452                        break;
3453                 }
3454         }
3455
3456         return sel_phy_idx;
3457
3458 }
3459 int bnx2x_get_link_cfg_idx(struct bnx2x *bp)
3460 {
3461         u32 sel_phy_idx = bnx2x_get_cur_phy_idx(bp);
3462         /*
3463          * The selected actived PHY is always after swapping (in case PHY
3464          * swapping is enabled). So when swapping is enabled, we need to reverse
3465          * the configuration
3466          */
3467
3468         if (bp->link_params.multi_phy_config &
3469             PORT_HW_CFG_PHY_SWAPPED_ENABLED) {
3470                 if (sel_phy_idx == EXT_PHY1)
3471                         sel_phy_idx = EXT_PHY2;
3472                 else if (sel_phy_idx == EXT_PHY2)
3473                         sel_phy_idx = EXT_PHY1;
3474         }
3475         return LINK_CONFIG_IDX(sel_phy_idx);
3476 }
3477
3478 #if defined(NETDEV_FCOE_WWNN) && defined(BCM_CNIC)
3479 int bnx2x_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
3480 {
3481         struct bnx2x *bp = netdev_priv(dev);
3482         struct cnic_eth_dev *cp = &bp->cnic_eth_dev;
3483
3484         switch (type) {
3485         case NETDEV_FCOE_WWNN:
3486                 *wwn = HILO_U64(cp->fcoe_wwn_node_name_hi,
3487                                 cp->fcoe_wwn_node_name_lo);
3488                 break;
3489         case NETDEV_FCOE_WWPN:
3490                 *wwn = HILO_U64(cp->fcoe_wwn_port_name_hi,
3491                                 cp->fcoe_wwn_port_name_lo);
3492                 break;
3493         default:
3494                 BNX2X_ERR("Wrong WWN type requested - %d\n", type);
3495                 return -EINVAL;
3496         }
3497
3498         return 0;
3499 }
3500 #endif
3501
3502 /* called with rtnl_lock */
3503 int bnx2x_change_mtu(struct net_device *dev, int new_mtu)
3504 {
3505         struct bnx2x *bp = netdev_priv(dev);
3506
3507         if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
3508                 BNX2X_ERR("Can't perform change MTU during parity recovery\n");
3509                 return -EAGAIN;
3510         }
3511
3512         if ((new_mtu > ETH_MAX_JUMBO_PACKET_SIZE) ||
3513             ((new_mtu + ETH_HLEN) < ETH_MIN_PACKET_SIZE)) {
3514                 BNX2X_ERR("Can't support requested MTU size\n");
3515                 return -EINVAL;
3516         }
3517
3518         /* This does not race with packet allocation
3519          * because the actual alloc size is
3520          * only updated as part of load
3521          */
3522         dev->mtu = new_mtu;
3523
3524         bp->gro_check = bnx2x_need_gro_check(new_mtu);
3525
3526         return bnx2x_reload_if_running(dev);
3527 }
3528
3529 netdev_features_t bnx2x_fix_features(struct net_device *dev,
3530                                      netdev_features_t features)
3531 {
3532         struct bnx2x *bp = netdev_priv(dev);
3533
3534         /* TPA requires Rx CSUM offloading */
3535         if (!(features & NETIF_F_RXCSUM) || bp->disable_tpa) {
3536                 features &= ~NETIF_F_LRO;
3537                 features &= ~NETIF_F_GRO;
3538         }
3539
3540         return features;
3541 }
3542
3543 int bnx2x_set_features(struct net_device *dev, netdev_features_t features)
3544 {
3545         struct bnx2x *bp = netdev_priv(dev);
3546         u32 flags = bp->flags;
3547         bool bnx2x_reload = false;
3548
3549         if (features & NETIF_F_LRO)
3550                 flags |= TPA_ENABLE_FLAG;
3551         else
3552                 flags &= ~TPA_ENABLE_FLAG;
3553
3554         if (features & NETIF_F_GRO)
3555                 flags |= GRO_ENABLE_FLAG;
3556         else
3557                 flags &= ~GRO_ENABLE_FLAG;
3558
3559         if (features & NETIF_F_LOOPBACK) {
3560                 if (bp->link_params.loopback_mode != LOOPBACK_BMAC) {
3561                         bp->link_params.loopback_mode = LOOPBACK_BMAC;
3562                         bnx2x_reload = true;
3563                 }
3564         } else {
3565                 if (bp->link_params.loopback_mode != LOOPBACK_NONE) {
3566                         bp->link_params.loopback_mode = LOOPBACK_NONE;
3567                         bnx2x_reload = true;
3568                 }
3569         }
3570
3571         if (flags ^ bp->flags) {
3572                 bp->flags = flags;
3573                 bnx2x_reload = true;
3574         }
3575
3576         if (bnx2x_reload) {
3577                 if (bp->recovery_state == BNX2X_RECOVERY_DONE)
3578                         return bnx2x_reload_if_running(dev);
3579                 /* else: bnx2x_nic_load() will be called at end of recovery */
3580         }
3581
3582         return 0;
3583 }
3584
3585 void bnx2x_tx_timeout(struct net_device *dev)
3586 {
3587         struct bnx2x *bp = netdev_priv(dev);
3588
3589 #ifdef BNX2X_STOP_ON_ERROR
3590         if (!bp->panic)
3591                 bnx2x_panic();
3592 #endif
3593
3594         smp_mb__before_clear_bit();
3595         set_bit(BNX2X_SP_RTNL_TX_TIMEOUT, &bp->sp_rtnl_state);
3596         smp_mb__after_clear_bit();
3597
3598         /* This allows the netif to be shutdown gracefully before resetting */
3599         schedule_delayed_work(&bp->sp_rtnl_task, 0);
3600 }
3601
3602 int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
3603 {
3604         struct net_device *dev = pci_get_drvdata(pdev);
3605         struct bnx2x *bp;
3606
3607         if (!dev) {
3608                 dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n");
3609                 return -ENODEV;
3610         }
3611         bp = netdev_priv(dev);
3612
3613         rtnl_lock();
3614
3615         pci_save_state(pdev);
3616
3617         if (!netif_running(dev)) {
3618                 rtnl_unlock();
3619                 return 0;
3620         }
3621
3622         netif_device_detach(dev);
3623
3624         bnx2x_nic_unload(bp, UNLOAD_CLOSE);
3625
3626         bnx2x_set_power_state(bp, pci_choose_state(pdev, state));
3627
3628         rtnl_unlock();
3629
3630         return 0;
3631 }
3632
3633 int bnx2x_resume(struct pci_dev *pdev)
3634 {
3635         struct net_device *dev = pci_get_drvdata(pdev);
3636         struct bnx2x *bp;
3637         int rc;
3638
3639         if (!dev) {
3640                 dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n");
3641                 return -ENODEV;
3642         }
3643         bp = netdev_priv(dev);
3644
3645         if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
3646                 BNX2X_ERR("Handling parity error recovery. Try again later\n");
3647                 return -EAGAIN;
3648         }
3649
3650         rtnl_lock();
3651
3652         pci_restore_state(pdev);
3653
3654         if (!netif_running(dev)) {
3655                 rtnl_unlock();
3656                 return 0;
3657         }
3658
3659         bnx2x_set_power_state(bp, PCI_D0);
3660         netif_device_attach(dev);
3661
3662         rc = bnx2x_nic_load(bp, LOAD_OPEN);
3663
3664         rtnl_unlock();
3665
3666         return rc;
3667 }
3668
3669
3670 void bnx2x_set_ctx_validation(struct bnx2x *bp, struct eth_context *cxt,
3671                               u32 cid)
3672 {
3673         /* ustorm cxt validation */
3674         cxt->ustorm_ag_context.cdu_usage =
3675                 CDU_RSRVD_VALUE_TYPE_A(HW_CID(bp, cid),
3676                         CDU_REGION_NUMBER_UCM_AG, ETH_CONNECTION_TYPE);
3677         /* xcontext validation */
3678         cxt->xstorm_ag_context.cdu_reserved =
3679                 CDU_RSRVD_VALUE_TYPE_A(HW_CID(bp, cid),
3680                         CDU_REGION_NUMBER_XCM_AG, ETH_CONNECTION_TYPE);
3681 }
3682
3683 static inline void storm_memset_hc_timeout(struct bnx2x *bp, u8 port,
3684                                              u8 fw_sb_id, u8 sb_index,
3685                                              u8 ticks)
3686 {
3687
3688         u32 addr = BAR_CSTRORM_INTMEM +
3689                    CSTORM_STATUS_BLOCK_DATA_TIMEOUT_OFFSET(fw_sb_id, sb_index);
3690         REG_WR8(bp, addr, ticks);
3691         DP(NETIF_MSG_IFUP,
3692            "port %x fw_sb_id %d sb_index %d ticks %d\n",
3693            port, fw_sb_id, sb_index, ticks);
3694 }
3695
3696 static inline void storm_memset_hc_disable(struct bnx2x *bp, u8 port,
3697                                              u16 fw_sb_id, u8 sb_index,
3698                                              u8 disable)
3699 {
3700         u32 enable_flag = disable ? 0 : (1 << HC_INDEX_DATA_HC_ENABLED_SHIFT);
3701         u32 addr = BAR_CSTRORM_INTMEM +
3702                    CSTORM_STATUS_BLOCK_DATA_FLAGS_OFFSET(fw_sb_id, sb_index);
3703         u16 flags = REG_RD16(bp, addr);
3704         /* clear and set */
3705         flags &= ~HC_INDEX_DATA_HC_ENABLED;
3706         flags |= enable_flag;
3707         REG_WR16(bp, addr, flags);
3708         DP(NETIF_MSG_IFUP,
3709            "port %x fw_sb_id %d sb_index %d disable %d\n",
3710            port, fw_sb_id, sb_index, disable);
3711 }
3712
3713 void bnx2x_update_coalesce_sb_index(struct bnx2x *bp, u8 fw_sb_id,
3714                                     u8 sb_index, u8 disable, u16 usec)
3715 {
3716         int port = BP_PORT(bp);
3717         u8 ticks = usec / BNX2X_BTR;
3718
3719         storm_memset_hc_timeout(bp, port, fw_sb_id, sb_index, ticks);
3720
3721         disable = disable ? 1 : (usec ? 0 : 1);
3722         storm_memset_hc_disable(bp, port, fw_sb_id, sb_index, disable);
3723 }