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bnx2x: Prevent inner-reload while VFs exist
[deliverable/linux.git] / drivers / net / ethernet / broadcom / bnx2x / bnx2x_cmn.c
1 /* bnx2x_cmn.c: Broadcom Everest network driver.
2 *
3 * Copyright (c) 2007-2013 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: Ariel Elior <ariel.elior@qlogic.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 <linux/crash_dump.h>
25 #include <net/tcp.h>
26 #include <net/ipv6.h>
27 #include <net/ip6_checksum.h>
28 #include <net/busy_poll.h>
29 #include <linux/prefetch.h>
30 #include "bnx2x_cmn.h"
31 #include "bnx2x_init.h"
32 #include "bnx2x_sp.h"
33
34 static void bnx2x_free_fp_mem_cnic(struct bnx2x *bp);
35 static int bnx2x_alloc_fp_mem_cnic(struct bnx2x *bp);
36 static int bnx2x_alloc_fp_mem(struct bnx2x *bp);
37 static int bnx2x_poll(struct napi_struct *napi, int budget);
38
39 static void bnx2x_add_all_napi_cnic(struct bnx2x *bp)
40 {
41 int i;
42
43 /* Add NAPI objects */
44 for_each_rx_queue_cnic(bp, i) {
45 netif_napi_add(bp->dev, &bnx2x_fp(bp, i, napi),
46 bnx2x_poll, NAPI_POLL_WEIGHT);
47 napi_hash_add(&bnx2x_fp(bp, i, napi));
48 }
49 }
50
51 static void bnx2x_add_all_napi(struct bnx2x *bp)
52 {
53 int i;
54
55 /* Add NAPI objects */
56 for_each_eth_queue(bp, i) {
57 netif_napi_add(bp->dev, &bnx2x_fp(bp, i, napi),
58 bnx2x_poll, NAPI_POLL_WEIGHT);
59 napi_hash_add(&bnx2x_fp(bp, i, napi));
60 }
61 }
62
63 static int bnx2x_calc_num_queues(struct bnx2x *bp)
64 {
65 int nq = bnx2x_num_queues ? : netif_get_num_default_rss_queues();
66
67 /* Reduce memory usage in kdump environment by using only one queue */
68 if (is_kdump_kernel())
69 nq = 1;
70
71 nq = clamp(nq, 1, BNX2X_MAX_QUEUES(bp));
72 return nq;
73 }
74
75 /**
76 * bnx2x_move_fp - move content of the fastpath structure.
77 *
78 * @bp: driver handle
79 * @from: source FP index
80 * @to: destination FP index
81 *
82 * Makes sure the contents of the bp->fp[to].napi is kept
83 * intact. This is done by first copying the napi struct from
84 * the target to the source, and then mem copying the entire
85 * source onto the target. Update txdata pointers and related
86 * content.
87 */
88 static inline void bnx2x_move_fp(struct bnx2x *bp, int from, int to)
89 {
90 struct bnx2x_fastpath *from_fp = &bp->fp[from];
91 struct bnx2x_fastpath *to_fp = &bp->fp[to];
92 struct bnx2x_sp_objs *from_sp_objs = &bp->sp_objs[from];
93 struct bnx2x_sp_objs *to_sp_objs = &bp->sp_objs[to];
94 struct bnx2x_fp_stats *from_fp_stats = &bp->fp_stats[from];
95 struct bnx2x_fp_stats *to_fp_stats = &bp->fp_stats[to];
96 int old_max_eth_txqs, new_max_eth_txqs;
97 int old_txdata_index = 0, new_txdata_index = 0;
98 struct bnx2x_agg_info *old_tpa_info = to_fp->tpa_info;
99
100 /* Copy the NAPI object as it has been already initialized */
101 from_fp->napi = to_fp->napi;
102
103 /* Move bnx2x_fastpath contents */
104 memcpy(to_fp, from_fp, sizeof(*to_fp));
105 to_fp->index = to;
106
107 /* Retain the tpa_info of the original `to' version as we don't want
108 * 2 FPs to contain the same tpa_info pointer.
109 */
110 to_fp->tpa_info = old_tpa_info;
111
112 /* move sp_objs contents as well, as their indices match fp ones */
113 memcpy(to_sp_objs, from_sp_objs, sizeof(*to_sp_objs));
114
115 /* move fp_stats contents as well, as their indices match fp ones */
116 memcpy(to_fp_stats, from_fp_stats, sizeof(*to_fp_stats));
117
118 /* Update txdata pointers in fp and move txdata content accordingly:
119 * Each fp consumes 'max_cos' txdata structures, so the index should be
120 * decremented by max_cos x delta.
121 */
122
123 old_max_eth_txqs = BNX2X_NUM_ETH_QUEUES(bp) * (bp)->max_cos;
124 new_max_eth_txqs = (BNX2X_NUM_ETH_QUEUES(bp) - from + to) *
125 (bp)->max_cos;
126 if (from == FCOE_IDX(bp)) {
127 old_txdata_index = old_max_eth_txqs + FCOE_TXQ_IDX_OFFSET;
128 new_txdata_index = new_max_eth_txqs + FCOE_TXQ_IDX_OFFSET;
129 }
130
131 memcpy(&bp->bnx2x_txq[new_txdata_index],
132 &bp->bnx2x_txq[old_txdata_index],
133 sizeof(struct bnx2x_fp_txdata));
134 to_fp->txdata_ptr[0] = &bp->bnx2x_txq[new_txdata_index];
135 }
136
137 /**
138 * bnx2x_fill_fw_str - Fill buffer with FW version string.
139 *
140 * @bp: driver handle
141 * @buf: character buffer to fill with the fw name
142 * @buf_len: length of the above buffer
143 *
144 */
145 void bnx2x_fill_fw_str(struct bnx2x *bp, char *buf, size_t buf_len)
146 {
147 if (IS_PF(bp)) {
148 u8 phy_fw_ver[PHY_FW_VER_LEN];
149
150 phy_fw_ver[0] = '\0';
151 bnx2x_get_ext_phy_fw_version(&bp->link_params,
152 phy_fw_ver, PHY_FW_VER_LEN);
153 strlcpy(buf, bp->fw_ver, buf_len);
154 snprintf(buf + strlen(bp->fw_ver), 32 - strlen(bp->fw_ver),
155 "bc %d.%d.%d%s%s",
156 (bp->common.bc_ver & 0xff0000) >> 16,
157 (bp->common.bc_ver & 0xff00) >> 8,
158 (bp->common.bc_ver & 0xff),
159 ((phy_fw_ver[0] != '\0') ? " phy " : ""), phy_fw_ver);
160 } else {
161 bnx2x_vf_fill_fw_str(bp, buf, buf_len);
162 }
163 }
164
165 /**
166 * bnx2x_shrink_eth_fp - guarantees fastpath structures stay intact
167 *
168 * @bp: driver handle
169 * @delta: number of eth queues which were not allocated
170 */
171 static void bnx2x_shrink_eth_fp(struct bnx2x *bp, int delta)
172 {
173 int i, cos, old_eth_num = BNX2X_NUM_ETH_QUEUES(bp);
174
175 /* Queue pointer cannot be re-set on an fp-basis, as moving pointer
176 * backward along the array could cause memory to be overridden
177 */
178 for (cos = 1; cos < bp->max_cos; cos++) {
179 for (i = 0; i < old_eth_num - delta; i++) {
180 struct bnx2x_fastpath *fp = &bp->fp[i];
181 int new_idx = cos * (old_eth_num - delta) + i;
182
183 memcpy(&bp->bnx2x_txq[new_idx], fp->txdata_ptr[cos],
184 sizeof(struct bnx2x_fp_txdata));
185 fp->txdata_ptr[cos] = &bp->bnx2x_txq[new_idx];
186 }
187 }
188 }
189
190 int bnx2x_load_count[2][3] = { {0} }; /* per-path: 0-common, 1-port0, 2-port1 */
191
192 /* free skb in the packet ring at pos idx
193 * return idx of last bd freed
194 */
195 static u16 bnx2x_free_tx_pkt(struct bnx2x *bp, struct bnx2x_fp_txdata *txdata,
196 u16 idx, unsigned int *pkts_compl,
197 unsigned int *bytes_compl)
198 {
199 struct sw_tx_bd *tx_buf = &txdata->tx_buf_ring[idx];
200 struct eth_tx_start_bd *tx_start_bd;
201 struct eth_tx_bd *tx_data_bd;
202 struct sk_buff *skb = tx_buf->skb;
203 u16 bd_idx = TX_BD(tx_buf->first_bd), new_cons;
204 int nbd;
205 u16 split_bd_len = 0;
206
207 /* prefetch skb end pointer to speedup dev_kfree_skb() */
208 prefetch(&skb->end);
209
210 DP(NETIF_MSG_TX_DONE, "fp[%d]: pkt_idx %d buff @(%p)->skb %p\n",
211 txdata->txq_index, idx, tx_buf, skb);
212
213 tx_start_bd = &txdata->tx_desc_ring[bd_idx].start_bd;
214
215 nbd = le16_to_cpu(tx_start_bd->nbd) - 1;
216 #ifdef BNX2X_STOP_ON_ERROR
217 if ((nbd - 1) > (MAX_SKB_FRAGS + 2)) {
218 BNX2X_ERR("BAD nbd!\n");
219 bnx2x_panic();
220 }
221 #endif
222 new_cons = nbd + tx_buf->first_bd;
223
224 /* Get the next bd */
225 bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
226
227 /* Skip a parse bd... */
228 --nbd;
229 bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
230
231 if (tx_buf->flags & BNX2X_HAS_SECOND_PBD) {
232 /* Skip second parse bd... */
233 --nbd;
234 bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
235 }
236
237 /* TSO headers+data bds share a common mapping. See bnx2x_tx_split() */
238 if (tx_buf->flags & BNX2X_TSO_SPLIT_BD) {
239 tx_data_bd = &txdata->tx_desc_ring[bd_idx].reg_bd;
240 split_bd_len = BD_UNMAP_LEN(tx_data_bd);
241 --nbd;
242 bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
243 }
244
245 /* unmap first bd */
246 dma_unmap_single(&bp->pdev->dev, BD_UNMAP_ADDR(tx_start_bd),
247 BD_UNMAP_LEN(tx_start_bd) + split_bd_len,
248 DMA_TO_DEVICE);
249
250 /* now free frags */
251 while (nbd > 0) {
252
253 tx_data_bd = &txdata->tx_desc_ring[bd_idx].reg_bd;
254 dma_unmap_page(&bp->pdev->dev, BD_UNMAP_ADDR(tx_data_bd),
255 BD_UNMAP_LEN(tx_data_bd), DMA_TO_DEVICE);
256 if (--nbd)
257 bd_idx = TX_BD(NEXT_TX_IDX(bd_idx));
258 }
259
260 /* release skb */
261 WARN_ON(!skb);
262 if (likely(skb)) {
263 (*pkts_compl)++;
264 (*bytes_compl) += skb->len;
265 }
266
267 dev_kfree_skb_any(skb);
268 tx_buf->first_bd = 0;
269 tx_buf->skb = NULL;
270
271 return new_cons;
272 }
273
274 int bnx2x_tx_int(struct bnx2x *bp, struct bnx2x_fp_txdata *txdata)
275 {
276 struct netdev_queue *txq;
277 u16 hw_cons, sw_cons, bd_cons = txdata->tx_bd_cons;
278 unsigned int pkts_compl = 0, bytes_compl = 0;
279
280 #ifdef BNX2X_STOP_ON_ERROR
281 if (unlikely(bp->panic))
282 return -1;
283 #endif
284
285 txq = netdev_get_tx_queue(bp->dev, txdata->txq_index);
286 hw_cons = le16_to_cpu(*txdata->tx_cons_sb);
287 sw_cons = txdata->tx_pkt_cons;
288
289 while (sw_cons != hw_cons) {
290 u16 pkt_cons;
291
292 pkt_cons = TX_BD(sw_cons);
293
294 DP(NETIF_MSG_TX_DONE,
295 "queue[%d]: hw_cons %u sw_cons %u pkt_cons %u\n",
296 txdata->txq_index, hw_cons, sw_cons, pkt_cons);
297
298 bd_cons = bnx2x_free_tx_pkt(bp, txdata, pkt_cons,
299 &pkts_compl, &bytes_compl);
300
301 sw_cons++;
302 }
303
304 netdev_tx_completed_queue(txq, pkts_compl, bytes_compl);
305
306 txdata->tx_pkt_cons = sw_cons;
307 txdata->tx_bd_cons = bd_cons;
308
309 /* Need to make the tx_bd_cons update visible to start_xmit()
310 * before checking for netif_tx_queue_stopped(). Without the
311 * memory barrier, there is a small possibility that
312 * start_xmit() will miss it and cause the queue to be stopped
313 * forever.
314 * On the other hand we need an rmb() here to ensure the proper
315 * ordering of bit testing in the following
316 * netif_tx_queue_stopped(txq) call.
317 */
318 smp_mb();
319
320 if (unlikely(netif_tx_queue_stopped(txq))) {
321 /* Taking tx_lock() is needed to prevent re-enabling the queue
322 * while it's empty. This could have happen if rx_action() gets
323 * suspended in bnx2x_tx_int() after the condition before
324 * netif_tx_wake_queue(), while tx_action (bnx2x_start_xmit()):
325 *
326 * stops the queue->sees fresh tx_bd_cons->releases the queue->
327 * sends some packets consuming the whole queue again->
328 * stops the queue
329 */
330
331 __netif_tx_lock(txq, smp_processor_id());
332
333 if ((netif_tx_queue_stopped(txq)) &&
334 (bp->state == BNX2X_STATE_OPEN) &&
335 (bnx2x_tx_avail(bp, txdata) >= MAX_DESC_PER_TX_PKT))
336 netif_tx_wake_queue(txq);
337
338 __netif_tx_unlock(txq);
339 }
340 return 0;
341 }
342
343 static inline void bnx2x_update_last_max_sge(struct bnx2x_fastpath *fp,
344 u16 idx)
345 {
346 u16 last_max = fp->last_max_sge;
347
348 if (SUB_S16(idx, last_max) > 0)
349 fp->last_max_sge = idx;
350 }
351
352 static inline void bnx2x_update_sge_prod(struct bnx2x_fastpath *fp,
353 u16 sge_len,
354 struct eth_end_agg_rx_cqe *cqe)
355 {
356 struct bnx2x *bp = fp->bp;
357 u16 last_max, last_elem, first_elem;
358 u16 delta = 0;
359 u16 i;
360
361 if (!sge_len)
362 return;
363
364 /* First mark all used pages */
365 for (i = 0; i < sge_len; i++)
366 BIT_VEC64_CLEAR_BIT(fp->sge_mask,
367 RX_SGE(le16_to_cpu(cqe->sgl_or_raw_data.sgl[i])));
368
369 DP(NETIF_MSG_RX_STATUS, "fp_cqe->sgl[%d] = %d\n",
370 sge_len - 1, le16_to_cpu(cqe->sgl_or_raw_data.sgl[sge_len - 1]));
371
372 /* Here we assume that the last SGE index is the biggest */
373 prefetch((void *)(fp->sge_mask));
374 bnx2x_update_last_max_sge(fp,
375 le16_to_cpu(cqe->sgl_or_raw_data.sgl[sge_len - 1]));
376
377 last_max = RX_SGE(fp->last_max_sge);
378 last_elem = last_max >> BIT_VEC64_ELEM_SHIFT;
379 first_elem = RX_SGE(fp->rx_sge_prod) >> BIT_VEC64_ELEM_SHIFT;
380
381 /* If ring is not full */
382 if (last_elem + 1 != first_elem)
383 last_elem++;
384
385 /* Now update the prod */
386 for (i = first_elem; i != last_elem; i = NEXT_SGE_MASK_ELEM(i)) {
387 if (likely(fp->sge_mask[i]))
388 break;
389
390 fp->sge_mask[i] = BIT_VEC64_ELEM_ONE_MASK;
391 delta += BIT_VEC64_ELEM_SZ;
392 }
393
394 if (delta > 0) {
395 fp->rx_sge_prod += delta;
396 /* clear page-end entries */
397 bnx2x_clear_sge_mask_next_elems(fp);
398 }
399
400 DP(NETIF_MSG_RX_STATUS,
401 "fp->last_max_sge = %d fp->rx_sge_prod = %d\n",
402 fp->last_max_sge, fp->rx_sge_prod);
403 }
404
405 /* Get Toeplitz hash value in the skb using the value from the
406 * CQE (calculated by HW).
407 */
408 static u32 bnx2x_get_rxhash(const struct bnx2x *bp,
409 const struct eth_fast_path_rx_cqe *cqe,
410 enum pkt_hash_types *rxhash_type)
411 {
412 /* Get Toeplitz hash from CQE */
413 if ((bp->dev->features & NETIF_F_RXHASH) &&
414 (cqe->status_flags & ETH_FAST_PATH_RX_CQE_RSS_HASH_FLG)) {
415 enum eth_rss_hash_type htype;
416
417 htype = cqe->status_flags & ETH_FAST_PATH_RX_CQE_RSS_HASH_TYPE;
418 *rxhash_type = ((htype == TCP_IPV4_HASH_TYPE) ||
419 (htype == TCP_IPV6_HASH_TYPE)) ?
420 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3;
421
422 return le32_to_cpu(cqe->rss_hash_result);
423 }
424 *rxhash_type = PKT_HASH_TYPE_NONE;
425 return 0;
426 }
427
428 static void bnx2x_tpa_start(struct bnx2x_fastpath *fp, u16 queue,
429 u16 cons, u16 prod,
430 struct eth_fast_path_rx_cqe *cqe)
431 {
432 struct bnx2x *bp = fp->bp;
433 struct sw_rx_bd *cons_rx_buf = &fp->rx_buf_ring[cons];
434 struct sw_rx_bd *prod_rx_buf = &fp->rx_buf_ring[prod];
435 struct eth_rx_bd *prod_bd = &fp->rx_desc_ring[prod];
436 dma_addr_t mapping;
437 struct bnx2x_agg_info *tpa_info = &fp->tpa_info[queue];
438 struct sw_rx_bd *first_buf = &tpa_info->first_buf;
439
440 /* print error if current state != stop */
441 if (tpa_info->tpa_state != BNX2X_TPA_STOP)
442 BNX2X_ERR("start of bin not in stop [%d]\n", queue);
443
444 /* Try to map an empty data buffer from the aggregation info */
445 mapping = dma_map_single(&bp->pdev->dev,
446 first_buf->data + NET_SKB_PAD,
447 fp->rx_buf_size, DMA_FROM_DEVICE);
448 /*
449 * ...if it fails - move the skb from the consumer to the producer
450 * and set the current aggregation state as ERROR to drop it
451 * when TPA_STOP arrives.
452 */
453
454 if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
455 /* Move the BD from the consumer to the producer */
456 bnx2x_reuse_rx_data(fp, cons, prod);
457 tpa_info->tpa_state = BNX2X_TPA_ERROR;
458 return;
459 }
460
461 /* move empty data from pool to prod */
462 prod_rx_buf->data = first_buf->data;
463 dma_unmap_addr_set(prod_rx_buf, mapping, mapping);
464 /* point prod_bd to new data */
465 prod_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
466 prod_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
467
468 /* move partial skb from cons to pool (don't unmap yet) */
469 *first_buf = *cons_rx_buf;
470
471 /* mark bin state as START */
472 tpa_info->parsing_flags =
473 le16_to_cpu(cqe->pars_flags.flags);
474 tpa_info->vlan_tag = le16_to_cpu(cqe->vlan_tag);
475 tpa_info->tpa_state = BNX2X_TPA_START;
476 tpa_info->len_on_bd = le16_to_cpu(cqe->len_on_bd);
477 tpa_info->placement_offset = cqe->placement_offset;
478 tpa_info->rxhash = bnx2x_get_rxhash(bp, cqe, &tpa_info->rxhash_type);
479 if (fp->mode == TPA_MODE_GRO) {
480 u16 gro_size = le16_to_cpu(cqe->pkt_len_or_gro_seg_len);
481 tpa_info->full_page = SGE_PAGES / gro_size * gro_size;
482 tpa_info->gro_size = gro_size;
483 }
484
485 #ifdef BNX2X_STOP_ON_ERROR
486 fp->tpa_queue_used |= (1 << queue);
487 DP(NETIF_MSG_RX_STATUS, "fp->tpa_queue_used = 0x%llx\n",
488 fp->tpa_queue_used);
489 #endif
490 }
491
492 /* Timestamp option length allowed for TPA aggregation:
493 *
494 * nop nop kind length echo val
495 */
496 #define TPA_TSTAMP_OPT_LEN 12
497 /**
498 * bnx2x_set_gro_params - compute GRO values
499 *
500 * @skb: packet skb
501 * @parsing_flags: parsing flags from the START CQE
502 * @len_on_bd: total length of the first packet for the
503 * aggregation.
504 * @pkt_len: length of all segments
505 *
506 * Approximate value of the MSS for this aggregation calculated using
507 * the first packet of it.
508 * Compute number of aggregated segments, and gso_type.
509 */
510 static void bnx2x_set_gro_params(struct sk_buff *skb, u16 parsing_flags,
511 u16 len_on_bd, unsigned int pkt_len,
512 u16 num_of_coalesced_segs)
513 {
514 /* TPA aggregation won't have either IP options or TCP options
515 * other than timestamp or IPv6 extension headers.
516 */
517 u16 hdrs_len = ETH_HLEN + sizeof(struct tcphdr);
518
519 if (GET_FLAG(parsing_flags, PARSING_FLAGS_OVER_ETHERNET_PROTOCOL) ==
520 PRS_FLAG_OVERETH_IPV6) {
521 hdrs_len += sizeof(struct ipv6hdr);
522 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
523 } else {
524 hdrs_len += sizeof(struct iphdr);
525 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
526 }
527
528 /* Check if there was a TCP timestamp, if there is it's will
529 * always be 12 bytes length: nop nop kind length echo val.
530 *
531 * Otherwise FW would close the aggregation.
532 */
533 if (parsing_flags & PARSING_FLAGS_TIME_STAMP_EXIST_FLAG)
534 hdrs_len += TPA_TSTAMP_OPT_LEN;
535
536 skb_shinfo(skb)->gso_size = len_on_bd - hdrs_len;
537
538 /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count
539 * to skb_shinfo(skb)->gso_segs
540 */
541 NAPI_GRO_CB(skb)->count = num_of_coalesced_segs;
542 }
543
544 static int bnx2x_alloc_rx_sge(struct bnx2x *bp, struct bnx2x_fastpath *fp,
545 u16 index, gfp_t gfp_mask)
546 {
547 struct page *page = alloc_pages(gfp_mask, PAGES_PER_SGE_SHIFT);
548 struct sw_rx_page *sw_buf = &fp->rx_page_ring[index];
549 struct eth_rx_sge *sge = &fp->rx_sge_ring[index];
550 dma_addr_t mapping;
551
552 if (unlikely(page == NULL)) {
553 BNX2X_ERR("Can't alloc sge\n");
554 return -ENOMEM;
555 }
556
557 mapping = dma_map_page(&bp->pdev->dev, page, 0,
558 SGE_PAGES, DMA_FROM_DEVICE);
559 if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
560 __free_pages(page, PAGES_PER_SGE_SHIFT);
561 BNX2X_ERR("Can't map sge\n");
562 return -ENOMEM;
563 }
564
565 sw_buf->page = page;
566 dma_unmap_addr_set(sw_buf, mapping, mapping);
567
568 sge->addr_hi = cpu_to_le32(U64_HI(mapping));
569 sge->addr_lo = cpu_to_le32(U64_LO(mapping));
570
571 return 0;
572 }
573
574 static int bnx2x_fill_frag_skb(struct bnx2x *bp, struct bnx2x_fastpath *fp,
575 struct bnx2x_agg_info *tpa_info,
576 u16 pages,
577 struct sk_buff *skb,
578 struct eth_end_agg_rx_cqe *cqe,
579 u16 cqe_idx)
580 {
581 struct sw_rx_page *rx_pg, old_rx_pg;
582 u32 i, frag_len, frag_size;
583 int err, j, frag_id = 0;
584 u16 len_on_bd = tpa_info->len_on_bd;
585 u16 full_page = 0, gro_size = 0;
586
587 frag_size = le16_to_cpu(cqe->pkt_len) - len_on_bd;
588
589 if (fp->mode == TPA_MODE_GRO) {
590 gro_size = tpa_info->gro_size;
591 full_page = tpa_info->full_page;
592 }
593
594 /* This is needed in order to enable forwarding support */
595 if (frag_size)
596 bnx2x_set_gro_params(skb, tpa_info->parsing_flags, len_on_bd,
597 le16_to_cpu(cqe->pkt_len),
598 le16_to_cpu(cqe->num_of_coalesced_segs));
599
600 #ifdef BNX2X_STOP_ON_ERROR
601 if (pages > min_t(u32, 8, MAX_SKB_FRAGS) * SGE_PAGES) {
602 BNX2X_ERR("SGL length is too long: %d. CQE index is %d\n",
603 pages, cqe_idx);
604 BNX2X_ERR("cqe->pkt_len = %d\n", cqe->pkt_len);
605 bnx2x_panic();
606 return -EINVAL;
607 }
608 #endif
609
610 /* Run through the SGL and compose the fragmented skb */
611 for (i = 0, j = 0; i < pages; i += PAGES_PER_SGE, j++) {
612 u16 sge_idx = RX_SGE(le16_to_cpu(cqe->sgl_or_raw_data.sgl[j]));
613
614 /* FW gives the indices of the SGE as if the ring is an array
615 (meaning that "next" element will consume 2 indices) */
616 if (fp->mode == TPA_MODE_GRO)
617 frag_len = min_t(u32, frag_size, (u32)full_page);
618 else /* LRO */
619 frag_len = min_t(u32, frag_size, (u32)SGE_PAGES);
620
621 rx_pg = &fp->rx_page_ring[sge_idx];
622 old_rx_pg = *rx_pg;
623
624 /* If we fail to allocate a substitute page, we simply stop
625 where we are and drop the whole packet */
626 err = bnx2x_alloc_rx_sge(bp, fp, sge_idx, GFP_ATOMIC);
627 if (unlikely(err)) {
628 bnx2x_fp_qstats(bp, fp)->rx_skb_alloc_failed++;
629 return err;
630 }
631
632 /* Unmap the page as we're going to pass it to the stack */
633 dma_unmap_page(&bp->pdev->dev,
634 dma_unmap_addr(&old_rx_pg, mapping),
635 SGE_PAGES, DMA_FROM_DEVICE);
636 /* Add one frag and update the appropriate fields in the skb */
637 if (fp->mode == TPA_MODE_LRO)
638 skb_fill_page_desc(skb, j, old_rx_pg.page, 0, frag_len);
639 else { /* GRO */
640 int rem;
641 int offset = 0;
642 for (rem = frag_len; rem > 0; rem -= gro_size) {
643 int len = rem > gro_size ? gro_size : rem;
644 skb_fill_page_desc(skb, frag_id++,
645 old_rx_pg.page, offset, len);
646 if (offset)
647 get_page(old_rx_pg.page);
648 offset += len;
649 }
650 }
651
652 skb->data_len += frag_len;
653 skb->truesize += SGE_PAGES;
654 skb->len += frag_len;
655
656 frag_size -= frag_len;
657 }
658
659 return 0;
660 }
661
662 static void bnx2x_frag_free(const struct bnx2x_fastpath *fp, void *data)
663 {
664 if (fp->rx_frag_size)
665 put_page(virt_to_head_page(data));
666 else
667 kfree(data);
668 }
669
670 static void *bnx2x_frag_alloc(const struct bnx2x_fastpath *fp, gfp_t gfp_mask)
671 {
672 if (fp->rx_frag_size) {
673 /* GFP_KERNEL allocations are used only during initialization */
674 if (unlikely(gfp_mask & __GFP_WAIT))
675 return (void *)__get_free_page(gfp_mask);
676
677 return netdev_alloc_frag(fp->rx_frag_size);
678 }
679
680 return kmalloc(fp->rx_buf_size + NET_SKB_PAD, gfp_mask);
681 }
682
683 #ifdef CONFIG_INET
684 static void bnx2x_gro_ip_csum(struct bnx2x *bp, struct sk_buff *skb)
685 {
686 const struct iphdr *iph = ip_hdr(skb);
687 struct tcphdr *th;
688
689 skb_set_transport_header(skb, sizeof(struct iphdr));
690 th = tcp_hdr(skb);
691
692 th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb),
693 iph->saddr, iph->daddr, 0);
694 }
695
696 static void bnx2x_gro_ipv6_csum(struct bnx2x *bp, struct sk_buff *skb)
697 {
698 struct ipv6hdr *iph = ipv6_hdr(skb);
699 struct tcphdr *th;
700
701 skb_set_transport_header(skb, sizeof(struct ipv6hdr));
702 th = tcp_hdr(skb);
703
704 th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb),
705 &iph->saddr, &iph->daddr, 0);
706 }
707
708 static void bnx2x_gro_csum(struct bnx2x *bp, struct sk_buff *skb,
709 void (*gro_func)(struct bnx2x*, struct sk_buff*))
710 {
711 skb_set_network_header(skb, 0);
712 gro_func(bp, skb);
713 tcp_gro_complete(skb);
714 }
715 #endif
716
717 static void bnx2x_gro_receive(struct bnx2x *bp, struct bnx2x_fastpath *fp,
718 struct sk_buff *skb)
719 {
720 #ifdef CONFIG_INET
721 if (skb_shinfo(skb)->gso_size) {
722 switch (be16_to_cpu(skb->protocol)) {
723 case ETH_P_IP:
724 bnx2x_gro_csum(bp, skb, bnx2x_gro_ip_csum);
725 break;
726 case ETH_P_IPV6:
727 bnx2x_gro_csum(bp, skb, bnx2x_gro_ipv6_csum);
728 break;
729 default:
730 BNX2X_ERR("Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n",
731 be16_to_cpu(skb->protocol));
732 }
733 }
734 #endif
735 skb_record_rx_queue(skb, fp->rx_queue);
736 napi_gro_receive(&fp->napi, skb);
737 }
738
739 static void bnx2x_tpa_stop(struct bnx2x *bp, struct bnx2x_fastpath *fp,
740 struct bnx2x_agg_info *tpa_info,
741 u16 pages,
742 struct eth_end_agg_rx_cqe *cqe,
743 u16 cqe_idx)
744 {
745 struct sw_rx_bd *rx_buf = &tpa_info->first_buf;
746 u8 pad = tpa_info->placement_offset;
747 u16 len = tpa_info->len_on_bd;
748 struct sk_buff *skb = NULL;
749 u8 *new_data, *data = rx_buf->data;
750 u8 old_tpa_state = tpa_info->tpa_state;
751
752 tpa_info->tpa_state = BNX2X_TPA_STOP;
753
754 /* If we there was an error during the handling of the TPA_START -
755 * drop this aggregation.
756 */
757 if (old_tpa_state == BNX2X_TPA_ERROR)
758 goto drop;
759
760 /* Try to allocate the new data */
761 new_data = bnx2x_frag_alloc(fp, GFP_ATOMIC);
762 /* Unmap skb in the pool anyway, as we are going to change
763 pool entry status to BNX2X_TPA_STOP even if new skb allocation
764 fails. */
765 dma_unmap_single(&bp->pdev->dev, dma_unmap_addr(rx_buf, mapping),
766 fp->rx_buf_size, DMA_FROM_DEVICE);
767 if (likely(new_data))
768 skb = build_skb(data, fp->rx_frag_size);
769
770 if (likely(skb)) {
771 #ifdef BNX2X_STOP_ON_ERROR
772 if (pad + len > fp->rx_buf_size) {
773 BNX2X_ERR("skb_put is about to fail... pad %d len %d rx_buf_size %d\n",
774 pad, len, fp->rx_buf_size);
775 bnx2x_panic();
776 return;
777 }
778 #endif
779
780 skb_reserve(skb, pad + NET_SKB_PAD);
781 skb_put(skb, len);
782 skb_set_hash(skb, tpa_info->rxhash, tpa_info->rxhash_type);
783
784 skb->protocol = eth_type_trans(skb, bp->dev);
785 skb->ip_summed = CHECKSUM_UNNECESSARY;
786
787 if (!bnx2x_fill_frag_skb(bp, fp, tpa_info, pages,
788 skb, cqe, cqe_idx)) {
789 if (tpa_info->parsing_flags & PARSING_FLAGS_VLAN)
790 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tpa_info->vlan_tag);
791 bnx2x_gro_receive(bp, fp, skb);
792 } else {
793 DP(NETIF_MSG_RX_STATUS,
794 "Failed to allocate new pages - dropping packet!\n");
795 dev_kfree_skb_any(skb);
796 }
797
798 /* put new data in bin */
799 rx_buf->data = new_data;
800
801 return;
802 }
803 if (new_data)
804 bnx2x_frag_free(fp, new_data);
805 drop:
806 /* drop the packet and keep the buffer in the bin */
807 DP(NETIF_MSG_RX_STATUS,
808 "Failed to allocate or map a new skb - dropping packet!\n");
809 bnx2x_fp_stats(bp, fp)->eth_q_stats.rx_skb_alloc_failed++;
810 }
811
812 static int bnx2x_alloc_rx_data(struct bnx2x *bp, struct bnx2x_fastpath *fp,
813 u16 index, gfp_t gfp_mask)
814 {
815 u8 *data;
816 struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[index];
817 struct eth_rx_bd *rx_bd = &fp->rx_desc_ring[index];
818 dma_addr_t mapping;
819
820 data = bnx2x_frag_alloc(fp, gfp_mask);
821 if (unlikely(data == NULL))
822 return -ENOMEM;
823
824 mapping = dma_map_single(&bp->pdev->dev, data + NET_SKB_PAD,
825 fp->rx_buf_size,
826 DMA_FROM_DEVICE);
827 if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
828 bnx2x_frag_free(fp, data);
829 BNX2X_ERR("Can't map rx data\n");
830 return -ENOMEM;
831 }
832
833 rx_buf->data = data;
834 dma_unmap_addr_set(rx_buf, mapping, mapping);
835
836 rx_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
837 rx_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
838
839 return 0;
840 }
841
842 static
843 void bnx2x_csum_validate(struct sk_buff *skb, union eth_rx_cqe *cqe,
844 struct bnx2x_fastpath *fp,
845 struct bnx2x_eth_q_stats *qstats)
846 {
847 /* Do nothing if no L4 csum validation was done.
848 * We do not check whether IP csum was validated. For IPv4 we assume
849 * that if the card got as far as validating the L4 csum, it also
850 * validated the IP csum. IPv6 has no IP csum.
851 */
852 if (cqe->fast_path_cqe.status_flags &
853 ETH_FAST_PATH_RX_CQE_L4_XSUM_NO_VALIDATION_FLG)
854 return;
855
856 /* If L4 validation was done, check if an error was found. */
857
858 if (cqe->fast_path_cqe.type_error_flags &
859 (ETH_FAST_PATH_RX_CQE_IP_BAD_XSUM_FLG |
860 ETH_FAST_PATH_RX_CQE_L4_BAD_XSUM_FLG))
861 qstats->hw_csum_err++;
862 else
863 skb->ip_summed = CHECKSUM_UNNECESSARY;
864 }
865
866 static int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
867 {
868 struct bnx2x *bp = fp->bp;
869 u16 bd_cons, bd_prod, bd_prod_fw, comp_ring_cons;
870 u16 sw_comp_cons, sw_comp_prod;
871 int rx_pkt = 0;
872 union eth_rx_cqe *cqe;
873 struct eth_fast_path_rx_cqe *cqe_fp;
874
875 #ifdef BNX2X_STOP_ON_ERROR
876 if (unlikely(bp->panic))
877 return 0;
878 #endif
879 if (budget <= 0)
880 return rx_pkt;
881
882 bd_cons = fp->rx_bd_cons;
883 bd_prod = fp->rx_bd_prod;
884 bd_prod_fw = bd_prod;
885 sw_comp_cons = fp->rx_comp_cons;
886 sw_comp_prod = fp->rx_comp_prod;
887
888 comp_ring_cons = RCQ_BD(sw_comp_cons);
889 cqe = &fp->rx_comp_ring[comp_ring_cons];
890 cqe_fp = &cqe->fast_path_cqe;
891
892 DP(NETIF_MSG_RX_STATUS,
893 "queue[%d]: sw_comp_cons %u\n", fp->index, sw_comp_cons);
894
895 while (BNX2X_IS_CQE_COMPLETED(cqe_fp)) {
896 struct sw_rx_bd *rx_buf = NULL;
897 struct sk_buff *skb;
898 u8 cqe_fp_flags;
899 enum eth_rx_cqe_type cqe_fp_type;
900 u16 len, pad, queue;
901 u8 *data;
902 u32 rxhash;
903 enum pkt_hash_types rxhash_type;
904
905 #ifdef BNX2X_STOP_ON_ERROR
906 if (unlikely(bp->panic))
907 return 0;
908 #endif
909
910 bd_prod = RX_BD(bd_prod);
911 bd_cons = RX_BD(bd_cons);
912
913 /* A rmb() is required to ensure that the CQE is not read
914 * before it is written by the adapter DMA. PCI ordering
915 * rules will make sure the other fields are written before
916 * the marker at the end of struct eth_fast_path_rx_cqe
917 * but without rmb() a weakly ordered processor can process
918 * stale data. Without the barrier TPA state-machine might
919 * enter inconsistent state and kernel stack might be
920 * provided with incorrect packet description - these lead
921 * to various kernel crashed.
922 */
923 rmb();
924
925 cqe_fp_flags = cqe_fp->type_error_flags;
926 cqe_fp_type = cqe_fp_flags & ETH_FAST_PATH_RX_CQE_TYPE;
927
928 DP(NETIF_MSG_RX_STATUS,
929 "CQE type %x err %x status %x queue %x vlan %x len %u\n",
930 CQE_TYPE(cqe_fp_flags),
931 cqe_fp_flags, cqe_fp->status_flags,
932 le32_to_cpu(cqe_fp->rss_hash_result),
933 le16_to_cpu(cqe_fp->vlan_tag),
934 le16_to_cpu(cqe_fp->pkt_len_or_gro_seg_len));
935
936 /* is this a slowpath msg? */
937 if (unlikely(CQE_TYPE_SLOW(cqe_fp_type))) {
938 bnx2x_sp_event(fp, cqe);
939 goto next_cqe;
940 }
941
942 rx_buf = &fp->rx_buf_ring[bd_cons];
943 data = rx_buf->data;
944
945 if (!CQE_TYPE_FAST(cqe_fp_type)) {
946 struct bnx2x_agg_info *tpa_info;
947 u16 frag_size, pages;
948 #ifdef BNX2X_STOP_ON_ERROR
949 /* sanity check */
950 if (fp->disable_tpa &&
951 (CQE_TYPE_START(cqe_fp_type) ||
952 CQE_TYPE_STOP(cqe_fp_type)))
953 BNX2X_ERR("START/STOP packet while disable_tpa type %x\n",
954 CQE_TYPE(cqe_fp_type));
955 #endif
956
957 if (CQE_TYPE_START(cqe_fp_type)) {
958 u16 queue = cqe_fp->queue_index;
959 DP(NETIF_MSG_RX_STATUS,
960 "calling tpa_start on queue %d\n",
961 queue);
962
963 bnx2x_tpa_start(fp, queue,
964 bd_cons, bd_prod,
965 cqe_fp);
966
967 goto next_rx;
968 }
969 queue = cqe->end_agg_cqe.queue_index;
970 tpa_info = &fp->tpa_info[queue];
971 DP(NETIF_MSG_RX_STATUS,
972 "calling tpa_stop on queue %d\n",
973 queue);
974
975 frag_size = le16_to_cpu(cqe->end_agg_cqe.pkt_len) -
976 tpa_info->len_on_bd;
977
978 if (fp->mode == TPA_MODE_GRO)
979 pages = (frag_size + tpa_info->full_page - 1) /
980 tpa_info->full_page;
981 else
982 pages = SGE_PAGE_ALIGN(frag_size) >>
983 SGE_PAGE_SHIFT;
984
985 bnx2x_tpa_stop(bp, fp, tpa_info, pages,
986 &cqe->end_agg_cqe, comp_ring_cons);
987 #ifdef BNX2X_STOP_ON_ERROR
988 if (bp->panic)
989 return 0;
990 #endif
991
992 bnx2x_update_sge_prod(fp, pages, &cqe->end_agg_cqe);
993 goto next_cqe;
994 }
995 /* non TPA */
996 len = le16_to_cpu(cqe_fp->pkt_len_or_gro_seg_len);
997 pad = cqe_fp->placement_offset;
998 dma_sync_single_for_cpu(&bp->pdev->dev,
999 dma_unmap_addr(rx_buf, mapping),
1000 pad + RX_COPY_THRESH,
1001 DMA_FROM_DEVICE);
1002 pad += NET_SKB_PAD;
1003 prefetch(data + pad); /* speedup eth_type_trans() */
1004 /* is this an error packet? */
1005 if (unlikely(cqe_fp_flags & ETH_RX_ERROR_FALGS)) {
1006 DP(NETIF_MSG_RX_ERR | NETIF_MSG_RX_STATUS,
1007 "ERROR flags %x rx packet %u\n",
1008 cqe_fp_flags, sw_comp_cons);
1009 bnx2x_fp_qstats(bp, fp)->rx_err_discard_pkt++;
1010 goto reuse_rx;
1011 }
1012
1013 /* Since we don't have a jumbo ring
1014 * copy small packets if mtu > 1500
1015 */
1016 if ((bp->dev->mtu > ETH_MAX_PACKET_SIZE) &&
1017 (len <= RX_COPY_THRESH)) {
1018 skb = napi_alloc_skb(&fp->napi, len);
1019 if (skb == NULL) {
1020 DP(NETIF_MSG_RX_ERR | NETIF_MSG_RX_STATUS,
1021 "ERROR packet dropped because of alloc failure\n");
1022 bnx2x_fp_qstats(bp, fp)->rx_skb_alloc_failed++;
1023 goto reuse_rx;
1024 }
1025 memcpy(skb->data, data + pad, len);
1026 bnx2x_reuse_rx_data(fp, bd_cons, bd_prod);
1027 } else {
1028 if (likely(bnx2x_alloc_rx_data(bp, fp, bd_prod,
1029 GFP_ATOMIC) == 0)) {
1030 dma_unmap_single(&bp->pdev->dev,
1031 dma_unmap_addr(rx_buf, mapping),
1032 fp->rx_buf_size,
1033 DMA_FROM_DEVICE);
1034 skb = build_skb(data, fp->rx_frag_size);
1035 if (unlikely(!skb)) {
1036 bnx2x_frag_free(fp, data);
1037 bnx2x_fp_qstats(bp, fp)->
1038 rx_skb_alloc_failed++;
1039 goto next_rx;
1040 }
1041 skb_reserve(skb, pad);
1042 } else {
1043 DP(NETIF_MSG_RX_ERR | NETIF_MSG_RX_STATUS,
1044 "ERROR packet dropped because of alloc failure\n");
1045 bnx2x_fp_qstats(bp, fp)->rx_skb_alloc_failed++;
1046 reuse_rx:
1047 bnx2x_reuse_rx_data(fp, bd_cons, bd_prod);
1048 goto next_rx;
1049 }
1050 }
1051
1052 skb_put(skb, len);
1053 skb->protocol = eth_type_trans(skb, bp->dev);
1054
1055 /* Set Toeplitz hash for a none-LRO skb */
1056 rxhash = bnx2x_get_rxhash(bp, cqe_fp, &rxhash_type);
1057 skb_set_hash(skb, rxhash, rxhash_type);
1058
1059 skb_checksum_none_assert(skb);
1060
1061 if (bp->dev->features & NETIF_F_RXCSUM)
1062 bnx2x_csum_validate(skb, cqe, fp,
1063 bnx2x_fp_qstats(bp, fp));
1064
1065 skb_record_rx_queue(skb, fp->rx_queue);
1066
1067 /* Check if this packet was timestamped */
1068 if (unlikely(cqe->fast_path_cqe.type_error_flags &
1069 (1 << ETH_FAST_PATH_RX_CQE_PTP_PKT_SHIFT)))
1070 bnx2x_set_rx_ts(bp, skb);
1071
1072 if (le16_to_cpu(cqe_fp->pars_flags.flags) &
1073 PARSING_FLAGS_VLAN)
1074 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1075 le16_to_cpu(cqe_fp->vlan_tag));
1076
1077 skb_mark_napi_id(skb, &fp->napi);
1078
1079 if (bnx2x_fp_ll_polling(fp))
1080 netif_receive_skb(skb);
1081 else
1082 napi_gro_receive(&fp->napi, skb);
1083 next_rx:
1084 rx_buf->data = NULL;
1085
1086 bd_cons = NEXT_RX_IDX(bd_cons);
1087 bd_prod = NEXT_RX_IDX(bd_prod);
1088 bd_prod_fw = NEXT_RX_IDX(bd_prod_fw);
1089 rx_pkt++;
1090 next_cqe:
1091 sw_comp_prod = NEXT_RCQ_IDX(sw_comp_prod);
1092 sw_comp_cons = NEXT_RCQ_IDX(sw_comp_cons);
1093
1094 /* mark CQE as free */
1095 BNX2X_SEED_CQE(cqe_fp);
1096
1097 if (rx_pkt == budget)
1098 break;
1099
1100 comp_ring_cons = RCQ_BD(sw_comp_cons);
1101 cqe = &fp->rx_comp_ring[comp_ring_cons];
1102 cqe_fp = &cqe->fast_path_cqe;
1103 } /* while */
1104
1105 fp->rx_bd_cons = bd_cons;
1106 fp->rx_bd_prod = bd_prod_fw;
1107 fp->rx_comp_cons = sw_comp_cons;
1108 fp->rx_comp_prod = sw_comp_prod;
1109
1110 /* Update producers */
1111 bnx2x_update_rx_prod(bp, fp, bd_prod_fw, sw_comp_prod,
1112 fp->rx_sge_prod);
1113
1114 fp->rx_pkt += rx_pkt;
1115 fp->rx_calls++;
1116
1117 return rx_pkt;
1118 }
1119
1120 static irqreturn_t bnx2x_msix_fp_int(int irq, void *fp_cookie)
1121 {
1122 struct bnx2x_fastpath *fp = fp_cookie;
1123 struct bnx2x *bp = fp->bp;
1124 u8 cos;
1125
1126 DP(NETIF_MSG_INTR,
1127 "got an MSI-X interrupt on IDX:SB [fp %d fw_sd %d igusb %d]\n",
1128 fp->index, fp->fw_sb_id, fp->igu_sb_id);
1129
1130 bnx2x_ack_sb(bp, fp->igu_sb_id, USTORM_ID, 0, IGU_INT_DISABLE, 0);
1131
1132 #ifdef BNX2X_STOP_ON_ERROR
1133 if (unlikely(bp->panic))
1134 return IRQ_HANDLED;
1135 #endif
1136
1137 /* Handle Rx and Tx according to MSI-X vector */
1138 for_each_cos_in_tx_queue(fp, cos)
1139 prefetch(fp->txdata_ptr[cos]->tx_cons_sb);
1140
1141 prefetch(&fp->sb_running_index[SM_RX_ID]);
1142 napi_schedule_irqoff(&bnx2x_fp(bp, fp->index, napi));
1143
1144 return IRQ_HANDLED;
1145 }
1146
1147 /* HW Lock for shared dual port PHYs */
1148 void bnx2x_acquire_phy_lock(struct bnx2x *bp)
1149 {
1150 mutex_lock(&bp->port.phy_mutex);
1151
1152 bnx2x_acquire_hw_lock(bp, HW_LOCK_RESOURCE_MDIO);
1153 }
1154
1155 void bnx2x_release_phy_lock(struct bnx2x *bp)
1156 {
1157 bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_MDIO);
1158
1159 mutex_unlock(&bp->port.phy_mutex);
1160 }
1161
1162 /* calculates MF speed according to current linespeed and MF configuration */
1163 u16 bnx2x_get_mf_speed(struct bnx2x *bp)
1164 {
1165 u16 line_speed = bp->link_vars.line_speed;
1166 if (IS_MF(bp)) {
1167 u16 maxCfg = bnx2x_extract_max_cfg(bp,
1168 bp->mf_config[BP_VN(bp)]);
1169
1170 /* Calculate the current MAX line speed limit for the MF
1171 * devices
1172 */
1173 if (IS_MF_SI(bp))
1174 line_speed = (line_speed * maxCfg) / 100;
1175 else { /* SD mode */
1176 u16 vn_max_rate = maxCfg * 100;
1177
1178 if (vn_max_rate < line_speed)
1179 line_speed = vn_max_rate;
1180 }
1181 }
1182
1183 return line_speed;
1184 }
1185
1186 /**
1187 * bnx2x_fill_report_data - fill link report data to report
1188 *
1189 * @bp: driver handle
1190 * @data: link state to update
1191 *
1192 * It uses a none-atomic bit operations because is called under the mutex.
1193 */
1194 static void bnx2x_fill_report_data(struct bnx2x *bp,
1195 struct bnx2x_link_report_data *data)
1196 {
1197 memset(data, 0, sizeof(*data));
1198
1199 if (IS_PF(bp)) {
1200 /* Fill the report data: effective line speed */
1201 data->line_speed = bnx2x_get_mf_speed(bp);
1202
1203 /* Link is down */
1204 if (!bp->link_vars.link_up || (bp->flags & MF_FUNC_DIS))
1205 __set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
1206 &data->link_report_flags);
1207
1208 if (!BNX2X_NUM_ETH_QUEUES(bp))
1209 __set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
1210 &data->link_report_flags);
1211
1212 /* Full DUPLEX */
1213 if (bp->link_vars.duplex == DUPLEX_FULL)
1214 __set_bit(BNX2X_LINK_REPORT_FD,
1215 &data->link_report_flags);
1216
1217 /* Rx Flow Control is ON */
1218 if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_RX)
1219 __set_bit(BNX2X_LINK_REPORT_RX_FC_ON,
1220 &data->link_report_flags);
1221
1222 /* Tx Flow Control is ON */
1223 if (bp->link_vars.flow_ctrl & BNX2X_FLOW_CTRL_TX)
1224 __set_bit(BNX2X_LINK_REPORT_TX_FC_ON,
1225 &data->link_report_flags);
1226 } else { /* VF */
1227 *data = bp->vf_link_vars;
1228 }
1229 }
1230
1231 /**
1232 * bnx2x_link_report - report link status to OS.
1233 *
1234 * @bp: driver handle
1235 *
1236 * Calls the __bnx2x_link_report() under the same locking scheme
1237 * as a link/PHY state managing code to ensure a consistent link
1238 * reporting.
1239 */
1240
1241 void bnx2x_link_report(struct bnx2x *bp)
1242 {
1243 bnx2x_acquire_phy_lock(bp);
1244 __bnx2x_link_report(bp);
1245 bnx2x_release_phy_lock(bp);
1246 }
1247
1248 /**
1249 * __bnx2x_link_report - report link status to OS.
1250 *
1251 * @bp: driver handle
1252 *
1253 * None atomic implementation.
1254 * Should be called under the phy_lock.
1255 */
1256 void __bnx2x_link_report(struct bnx2x *bp)
1257 {
1258 struct bnx2x_link_report_data cur_data;
1259
1260 /* reread mf_cfg */
1261 if (IS_PF(bp) && !CHIP_IS_E1(bp))
1262 bnx2x_read_mf_cfg(bp);
1263
1264 /* Read the current link report info */
1265 bnx2x_fill_report_data(bp, &cur_data);
1266
1267 /* Don't report link down or exactly the same link status twice */
1268 if (!memcmp(&cur_data, &bp->last_reported_link, sizeof(cur_data)) ||
1269 (test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
1270 &bp->last_reported_link.link_report_flags) &&
1271 test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
1272 &cur_data.link_report_flags)))
1273 return;
1274
1275 bp->link_cnt++;
1276
1277 /* We are going to report a new link parameters now -
1278 * remember the current data for the next time.
1279 */
1280 memcpy(&bp->last_reported_link, &cur_data, sizeof(cur_data));
1281
1282 /* propagate status to VFs */
1283 if (IS_PF(bp))
1284 bnx2x_iov_link_update(bp);
1285
1286 if (test_bit(BNX2X_LINK_REPORT_LINK_DOWN,
1287 &cur_data.link_report_flags)) {
1288 netif_carrier_off(bp->dev);
1289 netdev_err(bp->dev, "NIC Link is Down\n");
1290 return;
1291 } else {
1292 const char *duplex;
1293 const char *flow;
1294
1295 netif_carrier_on(bp->dev);
1296
1297 if (test_and_clear_bit(BNX2X_LINK_REPORT_FD,
1298 &cur_data.link_report_flags))
1299 duplex = "full";
1300 else
1301 duplex = "half";
1302
1303 /* Handle the FC at the end so that only these flags would be
1304 * possibly set. This way we may easily check if there is no FC
1305 * enabled.
1306 */
1307 if (cur_data.link_report_flags) {
1308 if (test_bit(BNX2X_LINK_REPORT_RX_FC_ON,
1309 &cur_data.link_report_flags)) {
1310 if (test_bit(BNX2X_LINK_REPORT_TX_FC_ON,
1311 &cur_data.link_report_flags))
1312 flow = "ON - receive & transmit";
1313 else
1314 flow = "ON - receive";
1315 } else {
1316 flow = "ON - transmit";
1317 }
1318 } else {
1319 flow = "none";
1320 }
1321 netdev_info(bp->dev, "NIC Link is Up, %d Mbps %s duplex, Flow control: %s\n",
1322 cur_data.line_speed, duplex, flow);
1323 }
1324 }
1325
1326 static void bnx2x_set_next_page_sgl(struct bnx2x_fastpath *fp)
1327 {
1328 int i;
1329
1330 for (i = 1; i <= NUM_RX_SGE_PAGES; i++) {
1331 struct eth_rx_sge *sge;
1332
1333 sge = &fp->rx_sge_ring[RX_SGE_CNT * i - 2];
1334 sge->addr_hi =
1335 cpu_to_le32(U64_HI(fp->rx_sge_mapping +
1336 BCM_PAGE_SIZE*(i % NUM_RX_SGE_PAGES)));
1337
1338 sge->addr_lo =
1339 cpu_to_le32(U64_LO(fp->rx_sge_mapping +
1340 BCM_PAGE_SIZE*(i % NUM_RX_SGE_PAGES)));
1341 }
1342 }
1343
1344 static void bnx2x_free_tpa_pool(struct bnx2x *bp,
1345 struct bnx2x_fastpath *fp, int last)
1346 {
1347 int i;
1348
1349 for (i = 0; i < last; i++) {
1350 struct bnx2x_agg_info *tpa_info = &fp->tpa_info[i];
1351 struct sw_rx_bd *first_buf = &tpa_info->first_buf;
1352 u8 *data = first_buf->data;
1353
1354 if (data == NULL) {
1355 DP(NETIF_MSG_IFDOWN, "tpa bin %d empty on free\n", i);
1356 continue;
1357 }
1358 if (tpa_info->tpa_state == BNX2X_TPA_START)
1359 dma_unmap_single(&bp->pdev->dev,
1360 dma_unmap_addr(first_buf, mapping),
1361 fp->rx_buf_size, DMA_FROM_DEVICE);
1362 bnx2x_frag_free(fp, data);
1363 first_buf->data = NULL;
1364 }
1365 }
1366
1367 void bnx2x_init_rx_rings_cnic(struct bnx2x *bp)
1368 {
1369 int j;
1370
1371 for_each_rx_queue_cnic(bp, j) {
1372 struct bnx2x_fastpath *fp = &bp->fp[j];
1373
1374 fp->rx_bd_cons = 0;
1375
1376 /* Activate BD ring */
1377 /* Warning!
1378 * this will generate an interrupt (to the TSTORM)
1379 * must only be done after chip is initialized
1380 */
1381 bnx2x_update_rx_prod(bp, fp, fp->rx_bd_prod, fp->rx_comp_prod,
1382 fp->rx_sge_prod);
1383 }
1384 }
1385
1386 void bnx2x_init_rx_rings(struct bnx2x *bp)
1387 {
1388 int func = BP_FUNC(bp);
1389 u16 ring_prod;
1390 int i, j;
1391
1392 /* Allocate TPA resources */
1393 for_each_eth_queue(bp, j) {
1394 struct bnx2x_fastpath *fp = &bp->fp[j];
1395
1396 DP(NETIF_MSG_IFUP,
1397 "mtu %d rx_buf_size %d\n", bp->dev->mtu, fp->rx_buf_size);
1398
1399 if (!fp->disable_tpa) {
1400 /* Fill the per-aggregation pool */
1401 for (i = 0; i < MAX_AGG_QS(bp); i++) {
1402 struct bnx2x_agg_info *tpa_info =
1403 &fp->tpa_info[i];
1404 struct sw_rx_bd *first_buf =
1405 &tpa_info->first_buf;
1406
1407 first_buf->data =
1408 bnx2x_frag_alloc(fp, GFP_KERNEL);
1409 if (!first_buf->data) {
1410 BNX2X_ERR("Failed to allocate TPA skb pool for queue[%d] - disabling TPA on this queue!\n",
1411 j);
1412 bnx2x_free_tpa_pool(bp, fp, i);
1413 fp->disable_tpa = 1;
1414 break;
1415 }
1416 dma_unmap_addr_set(first_buf, mapping, 0);
1417 tpa_info->tpa_state = BNX2X_TPA_STOP;
1418 }
1419
1420 /* "next page" elements initialization */
1421 bnx2x_set_next_page_sgl(fp);
1422
1423 /* set SGEs bit mask */
1424 bnx2x_init_sge_ring_bit_mask(fp);
1425
1426 /* Allocate SGEs and initialize the ring elements */
1427 for (i = 0, ring_prod = 0;
1428 i < MAX_RX_SGE_CNT*NUM_RX_SGE_PAGES; i++) {
1429
1430 if (bnx2x_alloc_rx_sge(bp, fp, ring_prod,
1431 GFP_KERNEL) < 0) {
1432 BNX2X_ERR("was only able to allocate %d rx sges\n",
1433 i);
1434 BNX2X_ERR("disabling TPA for queue[%d]\n",
1435 j);
1436 /* Cleanup already allocated elements */
1437 bnx2x_free_rx_sge_range(bp, fp,
1438 ring_prod);
1439 bnx2x_free_tpa_pool(bp, fp,
1440 MAX_AGG_QS(bp));
1441 fp->disable_tpa = 1;
1442 ring_prod = 0;
1443 break;
1444 }
1445 ring_prod = NEXT_SGE_IDX(ring_prod);
1446 }
1447
1448 fp->rx_sge_prod = ring_prod;
1449 }
1450 }
1451
1452 for_each_eth_queue(bp, j) {
1453 struct bnx2x_fastpath *fp = &bp->fp[j];
1454
1455 fp->rx_bd_cons = 0;
1456
1457 /* Activate BD ring */
1458 /* Warning!
1459 * this will generate an interrupt (to the TSTORM)
1460 * must only be done after chip is initialized
1461 */
1462 bnx2x_update_rx_prod(bp, fp, fp->rx_bd_prod, fp->rx_comp_prod,
1463 fp->rx_sge_prod);
1464
1465 if (j != 0)
1466 continue;
1467
1468 if (CHIP_IS_E1(bp)) {
1469 REG_WR(bp, BAR_USTRORM_INTMEM +
1470 USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func),
1471 U64_LO(fp->rx_comp_mapping));
1472 REG_WR(bp, BAR_USTRORM_INTMEM +
1473 USTORM_MEM_WORKAROUND_ADDRESS_OFFSET(func) + 4,
1474 U64_HI(fp->rx_comp_mapping));
1475 }
1476 }
1477 }
1478
1479 static void bnx2x_free_tx_skbs_queue(struct bnx2x_fastpath *fp)
1480 {
1481 u8 cos;
1482 struct bnx2x *bp = fp->bp;
1483
1484 for_each_cos_in_tx_queue(fp, cos) {
1485 struct bnx2x_fp_txdata *txdata = fp->txdata_ptr[cos];
1486 unsigned pkts_compl = 0, bytes_compl = 0;
1487
1488 u16 sw_prod = txdata->tx_pkt_prod;
1489 u16 sw_cons = txdata->tx_pkt_cons;
1490
1491 while (sw_cons != sw_prod) {
1492 bnx2x_free_tx_pkt(bp, txdata, TX_BD(sw_cons),
1493 &pkts_compl, &bytes_compl);
1494 sw_cons++;
1495 }
1496
1497 netdev_tx_reset_queue(
1498 netdev_get_tx_queue(bp->dev,
1499 txdata->txq_index));
1500 }
1501 }
1502
1503 static void bnx2x_free_tx_skbs_cnic(struct bnx2x *bp)
1504 {
1505 int i;
1506
1507 for_each_tx_queue_cnic(bp, i) {
1508 bnx2x_free_tx_skbs_queue(&bp->fp[i]);
1509 }
1510 }
1511
1512 static void bnx2x_free_tx_skbs(struct bnx2x *bp)
1513 {
1514 int i;
1515
1516 for_each_eth_queue(bp, i) {
1517 bnx2x_free_tx_skbs_queue(&bp->fp[i]);
1518 }
1519 }
1520
1521 static void bnx2x_free_rx_bds(struct bnx2x_fastpath *fp)
1522 {
1523 struct bnx2x *bp = fp->bp;
1524 int i;
1525
1526 /* ring wasn't allocated */
1527 if (fp->rx_buf_ring == NULL)
1528 return;
1529
1530 for (i = 0; i < NUM_RX_BD; i++) {
1531 struct sw_rx_bd *rx_buf = &fp->rx_buf_ring[i];
1532 u8 *data = rx_buf->data;
1533
1534 if (data == NULL)
1535 continue;
1536 dma_unmap_single(&bp->pdev->dev,
1537 dma_unmap_addr(rx_buf, mapping),
1538 fp->rx_buf_size, DMA_FROM_DEVICE);
1539
1540 rx_buf->data = NULL;
1541 bnx2x_frag_free(fp, data);
1542 }
1543 }
1544
1545 static void bnx2x_free_rx_skbs_cnic(struct bnx2x *bp)
1546 {
1547 int j;
1548
1549 for_each_rx_queue_cnic(bp, j) {
1550 bnx2x_free_rx_bds(&bp->fp[j]);
1551 }
1552 }
1553
1554 static void bnx2x_free_rx_skbs(struct bnx2x *bp)
1555 {
1556 int j;
1557
1558 for_each_eth_queue(bp, j) {
1559 struct bnx2x_fastpath *fp = &bp->fp[j];
1560
1561 bnx2x_free_rx_bds(fp);
1562
1563 if (!fp->disable_tpa)
1564 bnx2x_free_tpa_pool(bp, fp, MAX_AGG_QS(bp));
1565 }
1566 }
1567
1568 static void bnx2x_free_skbs_cnic(struct bnx2x *bp)
1569 {
1570 bnx2x_free_tx_skbs_cnic(bp);
1571 bnx2x_free_rx_skbs_cnic(bp);
1572 }
1573
1574 void bnx2x_free_skbs(struct bnx2x *bp)
1575 {
1576 bnx2x_free_tx_skbs(bp);
1577 bnx2x_free_rx_skbs(bp);
1578 }
1579
1580 void bnx2x_update_max_mf_config(struct bnx2x *bp, u32 value)
1581 {
1582 /* load old values */
1583 u32 mf_cfg = bp->mf_config[BP_VN(bp)];
1584
1585 if (value != bnx2x_extract_max_cfg(bp, mf_cfg)) {
1586 /* leave all but MAX value */
1587 mf_cfg &= ~FUNC_MF_CFG_MAX_BW_MASK;
1588
1589 /* set new MAX value */
1590 mf_cfg |= (value << FUNC_MF_CFG_MAX_BW_SHIFT)
1591 & FUNC_MF_CFG_MAX_BW_MASK;
1592
1593 bnx2x_fw_command(bp, DRV_MSG_CODE_SET_MF_BW, mf_cfg);
1594 }
1595 }
1596
1597 /**
1598 * bnx2x_free_msix_irqs - free previously requested MSI-X IRQ vectors
1599 *
1600 * @bp: driver handle
1601 * @nvecs: number of vectors to be released
1602 */
1603 static void bnx2x_free_msix_irqs(struct bnx2x *bp, int nvecs)
1604 {
1605 int i, offset = 0;
1606
1607 if (nvecs == offset)
1608 return;
1609
1610 /* VFs don't have a default SB */
1611 if (IS_PF(bp)) {
1612 free_irq(bp->msix_table[offset].vector, bp->dev);
1613 DP(NETIF_MSG_IFDOWN, "released sp irq (%d)\n",
1614 bp->msix_table[offset].vector);
1615 offset++;
1616 }
1617
1618 if (CNIC_SUPPORT(bp)) {
1619 if (nvecs == offset)
1620 return;
1621 offset++;
1622 }
1623
1624 for_each_eth_queue(bp, i) {
1625 if (nvecs == offset)
1626 return;
1627 DP(NETIF_MSG_IFDOWN, "about to release fp #%d->%d irq\n",
1628 i, bp->msix_table[offset].vector);
1629
1630 free_irq(bp->msix_table[offset++].vector, &bp->fp[i]);
1631 }
1632 }
1633
1634 void bnx2x_free_irq(struct bnx2x *bp)
1635 {
1636 if (bp->flags & USING_MSIX_FLAG &&
1637 !(bp->flags & USING_SINGLE_MSIX_FLAG)) {
1638 int nvecs = BNX2X_NUM_ETH_QUEUES(bp) + CNIC_SUPPORT(bp);
1639
1640 /* vfs don't have a default status block */
1641 if (IS_PF(bp))
1642 nvecs++;
1643
1644 bnx2x_free_msix_irqs(bp, nvecs);
1645 } else {
1646 free_irq(bp->dev->irq, bp->dev);
1647 }
1648 }
1649
1650 int bnx2x_enable_msix(struct bnx2x *bp)
1651 {
1652 int msix_vec = 0, i, rc;
1653
1654 /* VFs don't have a default status block */
1655 if (IS_PF(bp)) {
1656 bp->msix_table[msix_vec].entry = msix_vec;
1657 BNX2X_DEV_INFO("msix_table[0].entry = %d (slowpath)\n",
1658 bp->msix_table[0].entry);
1659 msix_vec++;
1660 }
1661
1662 /* Cnic requires an msix vector for itself */
1663 if (CNIC_SUPPORT(bp)) {
1664 bp->msix_table[msix_vec].entry = msix_vec;
1665 BNX2X_DEV_INFO("msix_table[%d].entry = %d (CNIC)\n",
1666 msix_vec, bp->msix_table[msix_vec].entry);
1667 msix_vec++;
1668 }
1669
1670 /* We need separate vectors for ETH queues only (not FCoE) */
1671 for_each_eth_queue(bp, i) {
1672 bp->msix_table[msix_vec].entry = msix_vec;
1673 BNX2X_DEV_INFO("msix_table[%d].entry = %d (fastpath #%u)\n",
1674 msix_vec, msix_vec, i);
1675 msix_vec++;
1676 }
1677
1678 DP(BNX2X_MSG_SP, "about to request enable msix with %d vectors\n",
1679 msix_vec);
1680
1681 rc = pci_enable_msix_range(bp->pdev, &bp->msix_table[0],
1682 BNX2X_MIN_MSIX_VEC_CNT(bp), msix_vec);
1683 /*
1684 * reconfigure number of tx/rx queues according to available
1685 * MSI-X vectors
1686 */
1687 if (rc == -ENOSPC) {
1688 /* Get by with single vector */
1689 rc = pci_enable_msix_range(bp->pdev, &bp->msix_table[0], 1, 1);
1690 if (rc < 0) {
1691 BNX2X_DEV_INFO("Single MSI-X is not attainable rc %d\n",
1692 rc);
1693 goto no_msix;
1694 }
1695
1696 BNX2X_DEV_INFO("Using single MSI-X vector\n");
1697 bp->flags |= USING_SINGLE_MSIX_FLAG;
1698
1699 BNX2X_DEV_INFO("set number of queues to 1\n");
1700 bp->num_ethernet_queues = 1;
1701 bp->num_queues = bp->num_ethernet_queues + bp->num_cnic_queues;
1702 } else if (rc < 0) {
1703 BNX2X_DEV_INFO("MSI-X is not attainable rc %d\n", rc);
1704 goto no_msix;
1705 } else if (rc < msix_vec) {
1706 /* how less vectors we will have? */
1707 int diff = msix_vec - rc;
1708
1709 BNX2X_DEV_INFO("Trying to use less MSI-X vectors: %d\n", rc);
1710
1711 /*
1712 * decrease number of queues by number of unallocated entries
1713 */
1714 bp->num_ethernet_queues -= diff;
1715 bp->num_queues = bp->num_ethernet_queues + bp->num_cnic_queues;
1716
1717 BNX2X_DEV_INFO("New queue configuration set: %d\n",
1718 bp->num_queues);
1719 }
1720
1721 bp->flags |= USING_MSIX_FLAG;
1722
1723 return 0;
1724
1725 no_msix:
1726 /* fall to INTx if not enough memory */
1727 if (rc == -ENOMEM)
1728 bp->flags |= DISABLE_MSI_FLAG;
1729
1730 return rc;
1731 }
1732
1733 static int bnx2x_req_msix_irqs(struct bnx2x *bp)
1734 {
1735 int i, rc, offset = 0;
1736
1737 /* no default status block for vf */
1738 if (IS_PF(bp)) {
1739 rc = request_irq(bp->msix_table[offset++].vector,
1740 bnx2x_msix_sp_int, 0,
1741 bp->dev->name, bp->dev);
1742 if (rc) {
1743 BNX2X_ERR("request sp irq failed\n");
1744 return -EBUSY;
1745 }
1746 }
1747
1748 if (CNIC_SUPPORT(bp))
1749 offset++;
1750
1751 for_each_eth_queue(bp, i) {
1752 struct bnx2x_fastpath *fp = &bp->fp[i];
1753 snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
1754 bp->dev->name, i);
1755
1756 rc = request_irq(bp->msix_table[offset].vector,
1757 bnx2x_msix_fp_int, 0, fp->name, fp);
1758 if (rc) {
1759 BNX2X_ERR("request fp #%d irq (%d) failed rc %d\n", i,
1760 bp->msix_table[offset].vector, rc);
1761 bnx2x_free_msix_irqs(bp, offset);
1762 return -EBUSY;
1763 }
1764
1765 offset++;
1766 }
1767
1768 i = BNX2X_NUM_ETH_QUEUES(bp);
1769 if (IS_PF(bp)) {
1770 offset = 1 + CNIC_SUPPORT(bp);
1771 netdev_info(bp->dev,
1772 "using MSI-X IRQs: sp %d fp[%d] %d ... fp[%d] %d\n",
1773 bp->msix_table[0].vector,
1774 0, bp->msix_table[offset].vector,
1775 i - 1, bp->msix_table[offset + i - 1].vector);
1776 } else {
1777 offset = CNIC_SUPPORT(bp);
1778 netdev_info(bp->dev,
1779 "using MSI-X IRQs: fp[%d] %d ... fp[%d] %d\n",
1780 0, bp->msix_table[offset].vector,
1781 i - 1, bp->msix_table[offset + i - 1].vector);
1782 }
1783 return 0;
1784 }
1785
1786 int bnx2x_enable_msi(struct bnx2x *bp)
1787 {
1788 int rc;
1789
1790 rc = pci_enable_msi(bp->pdev);
1791 if (rc) {
1792 BNX2X_DEV_INFO("MSI is not attainable\n");
1793 return -1;
1794 }
1795 bp->flags |= USING_MSI_FLAG;
1796
1797 return 0;
1798 }
1799
1800 static int bnx2x_req_irq(struct bnx2x *bp)
1801 {
1802 unsigned long flags;
1803 unsigned int irq;
1804
1805 if (bp->flags & (USING_MSI_FLAG | USING_MSIX_FLAG))
1806 flags = 0;
1807 else
1808 flags = IRQF_SHARED;
1809
1810 if (bp->flags & USING_MSIX_FLAG)
1811 irq = bp->msix_table[0].vector;
1812 else
1813 irq = bp->pdev->irq;
1814
1815 return request_irq(irq, bnx2x_interrupt, flags, bp->dev->name, bp->dev);
1816 }
1817
1818 static int bnx2x_setup_irqs(struct bnx2x *bp)
1819 {
1820 int rc = 0;
1821 if (bp->flags & USING_MSIX_FLAG &&
1822 !(bp->flags & USING_SINGLE_MSIX_FLAG)) {
1823 rc = bnx2x_req_msix_irqs(bp);
1824 if (rc)
1825 return rc;
1826 } else {
1827 rc = bnx2x_req_irq(bp);
1828 if (rc) {
1829 BNX2X_ERR("IRQ request failed rc %d, aborting\n", rc);
1830 return rc;
1831 }
1832 if (bp->flags & USING_MSI_FLAG) {
1833 bp->dev->irq = bp->pdev->irq;
1834 netdev_info(bp->dev, "using MSI IRQ %d\n",
1835 bp->dev->irq);
1836 }
1837 if (bp->flags & USING_MSIX_FLAG) {
1838 bp->dev->irq = bp->msix_table[0].vector;
1839 netdev_info(bp->dev, "using MSIX IRQ %d\n",
1840 bp->dev->irq);
1841 }
1842 }
1843
1844 return 0;
1845 }
1846
1847 static void bnx2x_napi_enable_cnic(struct bnx2x *bp)
1848 {
1849 int i;
1850
1851 for_each_rx_queue_cnic(bp, i) {
1852 bnx2x_fp_busy_poll_init(&bp->fp[i]);
1853 napi_enable(&bnx2x_fp(bp, i, napi));
1854 }
1855 }
1856
1857 static void bnx2x_napi_enable(struct bnx2x *bp)
1858 {
1859 int i;
1860
1861 for_each_eth_queue(bp, i) {
1862 bnx2x_fp_busy_poll_init(&bp->fp[i]);
1863 napi_enable(&bnx2x_fp(bp, i, napi));
1864 }
1865 }
1866
1867 static void bnx2x_napi_disable_cnic(struct bnx2x *bp)
1868 {
1869 int i;
1870
1871 for_each_rx_queue_cnic(bp, i) {
1872 napi_disable(&bnx2x_fp(bp, i, napi));
1873 while (!bnx2x_fp_ll_disable(&bp->fp[i]))
1874 usleep_range(1000, 2000);
1875 }
1876 }
1877
1878 static void bnx2x_napi_disable(struct bnx2x *bp)
1879 {
1880 int i;
1881
1882 for_each_eth_queue(bp, i) {
1883 napi_disable(&bnx2x_fp(bp, i, napi));
1884 while (!bnx2x_fp_ll_disable(&bp->fp[i]))
1885 usleep_range(1000, 2000);
1886 }
1887 }
1888
1889 void bnx2x_netif_start(struct bnx2x *bp)
1890 {
1891 if (netif_running(bp->dev)) {
1892 bnx2x_napi_enable(bp);
1893 if (CNIC_LOADED(bp))
1894 bnx2x_napi_enable_cnic(bp);
1895 bnx2x_int_enable(bp);
1896 if (bp->state == BNX2X_STATE_OPEN)
1897 netif_tx_wake_all_queues(bp->dev);
1898 }
1899 }
1900
1901 void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw)
1902 {
1903 bnx2x_int_disable_sync(bp, disable_hw);
1904 bnx2x_napi_disable(bp);
1905 if (CNIC_LOADED(bp))
1906 bnx2x_napi_disable_cnic(bp);
1907 }
1908
1909 u16 bnx2x_select_queue(struct net_device *dev, struct sk_buff *skb,
1910 void *accel_priv, select_queue_fallback_t fallback)
1911 {
1912 struct bnx2x *bp = netdev_priv(dev);
1913
1914 if (CNIC_LOADED(bp) && !NO_FCOE(bp)) {
1915 struct ethhdr *hdr = (struct ethhdr *)skb->data;
1916 u16 ether_type = ntohs(hdr->h_proto);
1917
1918 /* Skip VLAN tag if present */
1919 if (ether_type == ETH_P_8021Q) {
1920 struct vlan_ethhdr *vhdr =
1921 (struct vlan_ethhdr *)skb->data;
1922
1923 ether_type = ntohs(vhdr->h_vlan_encapsulated_proto);
1924 }
1925
1926 /* If ethertype is FCoE or FIP - use FCoE ring */
1927 if ((ether_type == ETH_P_FCOE) || (ether_type == ETH_P_FIP))
1928 return bnx2x_fcoe_tx(bp, txq_index);
1929 }
1930
1931 /* select a non-FCoE queue */
1932 return fallback(dev, skb) % BNX2X_NUM_ETH_QUEUES(bp);
1933 }
1934
1935 void bnx2x_set_num_queues(struct bnx2x *bp)
1936 {
1937 /* RSS queues */
1938 bp->num_ethernet_queues = bnx2x_calc_num_queues(bp);
1939
1940 /* override in STORAGE SD modes */
1941 if (IS_MF_STORAGE_ONLY(bp))
1942 bp->num_ethernet_queues = 1;
1943
1944 /* Add special queues */
1945 bp->num_cnic_queues = CNIC_SUPPORT(bp); /* For FCOE */
1946 bp->num_queues = bp->num_ethernet_queues + bp->num_cnic_queues;
1947
1948 BNX2X_DEV_INFO("set number of queues to %d\n", bp->num_queues);
1949 }
1950
1951 /**
1952 * bnx2x_set_real_num_queues - configure netdev->real_num_[tx,rx]_queues
1953 *
1954 * @bp: Driver handle
1955 *
1956 * We currently support for at most 16 Tx queues for each CoS thus we will
1957 * allocate a multiple of 16 for ETH L2 rings according to the value of the
1958 * bp->max_cos.
1959 *
1960 * If there is an FCoE L2 queue the appropriate Tx queue will have the next
1961 * index after all ETH L2 indices.
1962 *
1963 * If the actual number of Tx queues (for each CoS) is less than 16 then there
1964 * will be the holes at the end of each group of 16 ETh L2 indices (0..15,
1965 * 16..31,...) with indices that are not coupled with any real Tx queue.
1966 *
1967 * The proper configuration of skb->queue_mapping is handled by
1968 * bnx2x_select_queue() and __skb_tx_hash().
1969 *
1970 * bnx2x_setup_tc() takes care of the proper TC mappings so that __skb_tx_hash()
1971 * will return a proper Tx index if TC is enabled (netdev->num_tc > 0).
1972 */
1973 static int bnx2x_set_real_num_queues(struct bnx2x *bp, int include_cnic)
1974 {
1975 int rc, tx, rx;
1976
1977 tx = BNX2X_NUM_ETH_QUEUES(bp) * bp->max_cos;
1978 rx = BNX2X_NUM_ETH_QUEUES(bp);
1979
1980 /* account for fcoe queue */
1981 if (include_cnic && !NO_FCOE(bp)) {
1982 rx++;
1983 tx++;
1984 }
1985
1986 rc = netif_set_real_num_tx_queues(bp->dev, tx);
1987 if (rc) {
1988 BNX2X_ERR("Failed to set real number of Tx queues: %d\n", rc);
1989 return rc;
1990 }
1991 rc = netif_set_real_num_rx_queues(bp->dev, rx);
1992 if (rc) {
1993 BNX2X_ERR("Failed to set real number of Rx queues: %d\n", rc);
1994 return rc;
1995 }
1996
1997 DP(NETIF_MSG_IFUP, "Setting real num queues to (tx, rx) (%d, %d)\n",
1998 tx, rx);
1999
2000 return rc;
2001 }
2002
2003 static void bnx2x_set_rx_buf_size(struct bnx2x *bp)
2004 {
2005 int i;
2006
2007 for_each_queue(bp, i) {
2008 struct bnx2x_fastpath *fp = &bp->fp[i];
2009 u32 mtu;
2010
2011 /* Always use a mini-jumbo MTU for the FCoE L2 ring */
2012 if (IS_FCOE_IDX(i))
2013 /*
2014 * Although there are no IP frames expected to arrive to
2015 * this ring we still want to add an
2016 * IP_HEADER_ALIGNMENT_PADDING to prevent a buffer
2017 * overrun attack.
2018 */
2019 mtu = BNX2X_FCOE_MINI_JUMBO_MTU;
2020 else
2021 mtu = bp->dev->mtu;
2022 fp->rx_buf_size = BNX2X_FW_RX_ALIGN_START +
2023 IP_HEADER_ALIGNMENT_PADDING +
2024 ETH_OVREHEAD +
2025 mtu +
2026 BNX2X_FW_RX_ALIGN_END;
2027 /* Note : rx_buf_size doesn't take into account NET_SKB_PAD */
2028 if (fp->rx_buf_size + NET_SKB_PAD <= PAGE_SIZE)
2029 fp->rx_frag_size = fp->rx_buf_size + NET_SKB_PAD;
2030 else
2031 fp->rx_frag_size = 0;
2032 }
2033 }
2034
2035 static int bnx2x_init_rss(struct bnx2x *bp)
2036 {
2037 int i;
2038 u8 num_eth_queues = BNX2X_NUM_ETH_QUEUES(bp);
2039
2040 /* Prepare the initial contents for the indirection table if RSS is
2041 * enabled
2042 */
2043 for (i = 0; i < sizeof(bp->rss_conf_obj.ind_table); i++)
2044 bp->rss_conf_obj.ind_table[i] =
2045 bp->fp->cl_id +
2046 ethtool_rxfh_indir_default(i, num_eth_queues);
2047
2048 /*
2049 * For 57710 and 57711 SEARCHER configuration (rss_keys) is
2050 * per-port, so if explicit configuration is needed , do it only
2051 * for a PMF.
2052 *
2053 * For 57712 and newer on the other hand it's a per-function
2054 * configuration.
2055 */
2056 return bnx2x_config_rss_eth(bp, bp->port.pmf || !CHIP_IS_E1x(bp));
2057 }
2058
2059 int bnx2x_rss(struct bnx2x *bp, struct bnx2x_rss_config_obj *rss_obj,
2060 bool config_hash, bool enable)
2061 {
2062 struct bnx2x_config_rss_params params = {NULL};
2063
2064 /* Although RSS is meaningless when there is a single HW queue we
2065 * still need it enabled in order to have HW Rx hash generated.
2066 *
2067 * if (!is_eth_multi(bp))
2068 * bp->multi_mode = ETH_RSS_MODE_DISABLED;
2069 */
2070
2071 params.rss_obj = rss_obj;
2072
2073 __set_bit(RAMROD_COMP_WAIT, &params.ramrod_flags);
2074
2075 if (enable) {
2076 __set_bit(BNX2X_RSS_MODE_REGULAR, &params.rss_flags);
2077
2078 /* RSS configuration */
2079 __set_bit(BNX2X_RSS_IPV4, &params.rss_flags);
2080 __set_bit(BNX2X_RSS_IPV4_TCP, &params.rss_flags);
2081 __set_bit(BNX2X_RSS_IPV6, &params.rss_flags);
2082 __set_bit(BNX2X_RSS_IPV6_TCP, &params.rss_flags);
2083 if (rss_obj->udp_rss_v4)
2084 __set_bit(BNX2X_RSS_IPV4_UDP, &params.rss_flags);
2085 if (rss_obj->udp_rss_v6)
2086 __set_bit(BNX2X_RSS_IPV6_UDP, &params.rss_flags);
2087
2088 if (!CHIP_IS_E1x(bp))
2089 /* valid only for TUNN_MODE_GRE tunnel mode */
2090 __set_bit(BNX2X_RSS_GRE_INNER_HDRS, &params.rss_flags);
2091 } else {
2092 __set_bit(BNX2X_RSS_MODE_DISABLED, &params.rss_flags);
2093 }
2094
2095 /* Hash bits */
2096 params.rss_result_mask = MULTI_MASK;
2097
2098 memcpy(params.ind_table, rss_obj->ind_table, sizeof(params.ind_table));
2099
2100 if (config_hash) {
2101 /* RSS keys */
2102 netdev_rss_key_fill(params.rss_key, T_ETH_RSS_KEY * 4);
2103 __set_bit(BNX2X_RSS_SET_SRCH, &params.rss_flags);
2104 }
2105
2106 if (IS_PF(bp))
2107 return bnx2x_config_rss(bp, &params);
2108 else
2109 return bnx2x_vfpf_config_rss(bp, &params);
2110 }
2111
2112 static int bnx2x_init_hw(struct bnx2x *bp, u32 load_code)
2113 {
2114 struct bnx2x_func_state_params func_params = {NULL};
2115
2116 /* Prepare parameters for function state transitions */
2117 __set_bit(RAMROD_COMP_WAIT, &func_params.ramrod_flags);
2118
2119 func_params.f_obj = &bp->func_obj;
2120 func_params.cmd = BNX2X_F_CMD_HW_INIT;
2121
2122 func_params.params.hw_init.load_phase = load_code;
2123
2124 return bnx2x_func_state_change(bp, &func_params);
2125 }
2126
2127 /*
2128 * Cleans the object that have internal lists without sending
2129 * ramrods. Should be run when interrupts are disabled.
2130 */
2131 void bnx2x_squeeze_objects(struct bnx2x *bp)
2132 {
2133 int rc;
2134 unsigned long ramrod_flags = 0, vlan_mac_flags = 0;
2135 struct bnx2x_mcast_ramrod_params rparam = {NULL};
2136 struct bnx2x_vlan_mac_obj *mac_obj = &bp->sp_objs->mac_obj;
2137
2138 /***************** Cleanup MACs' object first *************************/
2139
2140 /* Wait for completion of requested */
2141 __set_bit(RAMROD_COMP_WAIT, &ramrod_flags);
2142 /* Perform a dry cleanup */
2143 __set_bit(RAMROD_DRV_CLR_ONLY, &ramrod_flags);
2144
2145 /* Clean ETH primary MAC */
2146 __set_bit(BNX2X_ETH_MAC, &vlan_mac_flags);
2147 rc = mac_obj->delete_all(bp, &bp->sp_objs->mac_obj, &vlan_mac_flags,
2148 &ramrod_flags);
2149 if (rc != 0)
2150 BNX2X_ERR("Failed to clean ETH MACs: %d\n", rc);
2151
2152 /* Cleanup UC list */
2153 vlan_mac_flags = 0;
2154 __set_bit(BNX2X_UC_LIST_MAC, &vlan_mac_flags);
2155 rc = mac_obj->delete_all(bp, mac_obj, &vlan_mac_flags,
2156 &ramrod_flags);
2157 if (rc != 0)
2158 BNX2X_ERR("Failed to clean UC list MACs: %d\n", rc);
2159
2160 /***************** Now clean mcast object *****************************/
2161 rparam.mcast_obj = &bp->mcast_obj;
2162 __set_bit(RAMROD_DRV_CLR_ONLY, &rparam.ramrod_flags);
2163
2164 /* Add a DEL command... - Since we're doing a driver cleanup only,
2165 * we take a lock surrounding both the initial send and the CONTs,
2166 * as we don't want a true completion to disrupt us in the middle.
2167 */
2168 netif_addr_lock_bh(bp->dev);
2169 rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_DEL);
2170 if (rc < 0)
2171 BNX2X_ERR("Failed to add a new DEL command to a multi-cast object: %d\n",
2172 rc);
2173
2174 /* ...and wait until all pending commands are cleared */
2175 rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_CONT);
2176 while (rc != 0) {
2177 if (rc < 0) {
2178 BNX2X_ERR("Failed to clean multi-cast object: %d\n",
2179 rc);
2180 netif_addr_unlock_bh(bp->dev);
2181 return;
2182 }
2183
2184 rc = bnx2x_config_mcast(bp, &rparam, BNX2X_MCAST_CMD_CONT);
2185 }
2186 netif_addr_unlock_bh(bp->dev);
2187 }
2188
2189 #ifndef BNX2X_STOP_ON_ERROR
2190 #define LOAD_ERROR_EXIT(bp, label) \
2191 do { \
2192 (bp)->state = BNX2X_STATE_ERROR; \
2193 goto label; \
2194 } while (0)
2195
2196 #define LOAD_ERROR_EXIT_CNIC(bp, label) \
2197 do { \
2198 bp->cnic_loaded = false; \
2199 goto label; \
2200 } while (0)
2201 #else /*BNX2X_STOP_ON_ERROR*/
2202 #define LOAD_ERROR_EXIT(bp, label) \
2203 do { \
2204 (bp)->state = BNX2X_STATE_ERROR; \
2205 (bp)->panic = 1; \
2206 return -EBUSY; \
2207 } while (0)
2208 #define LOAD_ERROR_EXIT_CNIC(bp, label) \
2209 do { \
2210 bp->cnic_loaded = false; \
2211 (bp)->panic = 1; \
2212 return -EBUSY; \
2213 } while (0)
2214 #endif /*BNX2X_STOP_ON_ERROR*/
2215
2216 static void bnx2x_free_fw_stats_mem(struct bnx2x *bp)
2217 {
2218 BNX2X_PCI_FREE(bp->fw_stats, bp->fw_stats_mapping,
2219 bp->fw_stats_data_sz + bp->fw_stats_req_sz);
2220 return;
2221 }
2222
2223 static int bnx2x_alloc_fw_stats_mem(struct bnx2x *bp)
2224 {
2225 int num_groups, vf_headroom = 0;
2226 int is_fcoe_stats = NO_FCOE(bp) ? 0 : 1;
2227
2228 /* number of queues for statistics is number of eth queues + FCoE */
2229 u8 num_queue_stats = BNX2X_NUM_ETH_QUEUES(bp) + is_fcoe_stats;
2230
2231 /* Total number of FW statistics requests =
2232 * 1 for port stats + 1 for PF stats + potential 2 for FCoE (fcoe proper
2233 * and fcoe l2 queue) stats + num of queues (which includes another 1
2234 * for fcoe l2 queue if applicable)
2235 */
2236 bp->fw_stats_num = 2 + is_fcoe_stats + num_queue_stats;
2237
2238 /* vf stats appear in the request list, but their data is allocated by
2239 * the VFs themselves. We don't include them in the bp->fw_stats_num as
2240 * it is used to determine where to place the vf stats queries in the
2241 * request struct
2242 */
2243 if (IS_SRIOV(bp))
2244 vf_headroom = bnx2x_vf_headroom(bp);
2245
2246 /* Request is built from stats_query_header and an array of
2247 * stats_query_cmd_group each of which contains
2248 * STATS_QUERY_CMD_COUNT rules. The real number or requests is
2249 * configured in the stats_query_header.
2250 */
2251 num_groups =
2252 (((bp->fw_stats_num + vf_headroom) / STATS_QUERY_CMD_COUNT) +
2253 (((bp->fw_stats_num + vf_headroom) % STATS_QUERY_CMD_COUNT) ?
2254 1 : 0));
2255
2256 DP(BNX2X_MSG_SP, "stats fw_stats_num %d, vf headroom %d, num_groups %d\n",
2257 bp->fw_stats_num, vf_headroom, num_groups);
2258 bp->fw_stats_req_sz = sizeof(struct stats_query_header) +
2259 num_groups * sizeof(struct stats_query_cmd_group);
2260
2261 /* Data for statistics requests + stats_counter
2262 * stats_counter holds per-STORM counters that are incremented
2263 * when STORM has finished with the current request.
2264 * memory for FCoE offloaded statistics are counted anyway,
2265 * even if they will not be sent.
2266 * VF stats are not accounted for here as the data of VF stats is stored
2267 * in memory allocated by the VF, not here.
2268 */
2269 bp->fw_stats_data_sz = sizeof(struct per_port_stats) +
2270 sizeof(struct per_pf_stats) +
2271 sizeof(struct fcoe_statistics_params) +
2272 sizeof(struct per_queue_stats) * num_queue_stats +
2273 sizeof(struct stats_counter);
2274
2275 bp->fw_stats = BNX2X_PCI_ALLOC(&bp->fw_stats_mapping,
2276 bp->fw_stats_data_sz + bp->fw_stats_req_sz);
2277 if (!bp->fw_stats)
2278 goto alloc_mem_err;
2279
2280 /* Set shortcuts */
2281 bp->fw_stats_req = (struct bnx2x_fw_stats_req *)bp->fw_stats;
2282 bp->fw_stats_req_mapping = bp->fw_stats_mapping;
2283 bp->fw_stats_data = (struct bnx2x_fw_stats_data *)
2284 ((u8 *)bp->fw_stats + bp->fw_stats_req_sz);
2285 bp->fw_stats_data_mapping = bp->fw_stats_mapping +
2286 bp->fw_stats_req_sz;
2287
2288 DP(BNX2X_MSG_SP, "statistics request base address set to %x %x\n",
2289 U64_HI(bp->fw_stats_req_mapping),
2290 U64_LO(bp->fw_stats_req_mapping));
2291 DP(BNX2X_MSG_SP, "statistics data base address set to %x %x\n",
2292 U64_HI(bp->fw_stats_data_mapping),
2293 U64_LO(bp->fw_stats_data_mapping));
2294 return 0;
2295
2296 alloc_mem_err:
2297 bnx2x_free_fw_stats_mem(bp);
2298 BNX2X_ERR("Can't allocate FW stats memory\n");
2299 return -ENOMEM;
2300 }
2301
2302 /* send load request to mcp and analyze response */
2303 static int bnx2x_nic_load_request(struct bnx2x *bp, u32 *load_code)
2304 {
2305 u32 param;
2306
2307 /* init fw_seq */
2308 bp->fw_seq =
2309 (SHMEM_RD(bp, func_mb[BP_FW_MB_IDX(bp)].drv_mb_header) &
2310 DRV_MSG_SEQ_NUMBER_MASK);
2311 BNX2X_DEV_INFO("fw_seq 0x%08x\n", bp->fw_seq);
2312
2313 /* Get current FW pulse sequence */
2314 bp->fw_drv_pulse_wr_seq =
2315 (SHMEM_RD(bp, func_mb[BP_FW_MB_IDX(bp)].drv_pulse_mb) &
2316 DRV_PULSE_SEQ_MASK);
2317 BNX2X_DEV_INFO("drv_pulse 0x%x\n", bp->fw_drv_pulse_wr_seq);
2318
2319 param = DRV_MSG_CODE_LOAD_REQ_WITH_LFA;
2320
2321 if (IS_MF_SD(bp) && bnx2x_port_after_undi(bp))
2322 param |= DRV_MSG_CODE_LOAD_REQ_FORCE_LFA;
2323
2324 /* load request */
2325 (*load_code) = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_REQ, param);
2326
2327 /* if mcp fails to respond we must abort */
2328 if (!(*load_code)) {
2329 BNX2X_ERR("MCP response failure, aborting\n");
2330 return -EBUSY;
2331 }
2332
2333 /* If mcp refused (e.g. other port is in diagnostic mode) we
2334 * must abort
2335 */
2336 if ((*load_code) == FW_MSG_CODE_DRV_LOAD_REFUSED) {
2337 BNX2X_ERR("MCP refused load request, aborting\n");
2338 return -EBUSY;
2339 }
2340 return 0;
2341 }
2342
2343 /* check whether another PF has already loaded FW to chip. In
2344 * virtualized environments a pf from another VM may have already
2345 * initialized the device including loading FW
2346 */
2347 int bnx2x_compare_fw_ver(struct bnx2x *bp, u32 load_code, bool print_err)
2348 {
2349 /* is another pf loaded on this engine? */
2350 if (load_code != FW_MSG_CODE_DRV_LOAD_COMMON_CHIP &&
2351 load_code != FW_MSG_CODE_DRV_LOAD_COMMON) {
2352 /* build my FW version dword */
2353 u32 my_fw = (BCM_5710_FW_MAJOR_VERSION) +
2354 (BCM_5710_FW_MINOR_VERSION << 8) +
2355 (BCM_5710_FW_REVISION_VERSION << 16) +
2356 (BCM_5710_FW_ENGINEERING_VERSION << 24);
2357
2358 /* read loaded FW from chip */
2359 u32 loaded_fw = REG_RD(bp, XSEM_REG_PRAM);
2360
2361 DP(BNX2X_MSG_SP, "loaded fw %x, my fw %x\n",
2362 loaded_fw, my_fw);
2363
2364 /* abort nic load if version mismatch */
2365 if (my_fw != loaded_fw) {
2366 if (print_err)
2367 BNX2X_ERR("bnx2x with FW %x was already loaded which mismatches my %x FW. Aborting\n",
2368 loaded_fw, my_fw);
2369 else
2370 BNX2X_DEV_INFO("bnx2x with FW %x was already loaded which mismatches my %x FW, possibly due to MF UNDI\n",
2371 loaded_fw, my_fw);
2372 return -EBUSY;
2373 }
2374 }
2375 return 0;
2376 }
2377
2378 /* returns the "mcp load_code" according to global load_count array */
2379 static int bnx2x_nic_load_no_mcp(struct bnx2x *bp, int port)
2380 {
2381 int path = BP_PATH(bp);
2382
2383 DP(NETIF_MSG_IFUP, "NO MCP - load counts[%d] %d, %d, %d\n",
2384 path, bnx2x_load_count[path][0], bnx2x_load_count[path][1],
2385 bnx2x_load_count[path][2]);
2386 bnx2x_load_count[path][0]++;
2387 bnx2x_load_count[path][1 + port]++;
2388 DP(NETIF_MSG_IFUP, "NO MCP - new load counts[%d] %d, %d, %d\n",
2389 path, bnx2x_load_count[path][0], bnx2x_load_count[path][1],
2390 bnx2x_load_count[path][2]);
2391 if (bnx2x_load_count[path][0] == 1)
2392 return FW_MSG_CODE_DRV_LOAD_COMMON;
2393 else if (bnx2x_load_count[path][1 + port] == 1)
2394 return FW_MSG_CODE_DRV_LOAD_PORT;
2395 else
2396 return FW_MSG_CODE_DRV_LOAD_FUNCTION;
2397 }
2398
2399 /* mark PMF if applicable */
2400 static void bnx2x_nic_load_pmf(struct bnx2x *bp, u32 load_code)
2401 {
2402 if ((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) ||
2403 (load_code == FW_MSG_CODE_DRV_LOAD_COMMON_CHIP) ||
2404 (load_code == FW_MSG_CODE_DRV_LOAD_PORT)) {
2405 bp->port.pmf = 1;
2406 /* We need the barrier to ensure the ordering between the
2407 * writing to bp->port.pmf here and reading it from the
2408 * bnx2x_periodic_task().
2409 */
2410 smp_mb();
2411 } else {
2412 bp->port.pmf = 0;
2413 }
2414
2415 DP(NETIF_MSG_LINK, "pmf %d\n", bp->port.pmf);
2416 }
2417
2418 static void bnx2x_nic_load_afex_dcc(struct bnx2x *bp, int load_code)
2419 {
2420 if (((load_code == FW_MSG_CODE_DRV_LOAD_COMMON) ||
2421 (load_code == FW_MSG_CODE_DRV_LOAD_COMMON_CHIP)) &&
2422 (bp->common.shmem2_base)) {
2423 if (SHMEM2_HAS(bp, dcc_support))
2424 SHMEM2_WR(bp, dcc_support,
2425 (SHMEM_DCC_SUPPORT_DISABLE_ENABLE_PF_TLV |
2426 SHMEM_DCC_SUPPORT_BANDWIDTH_ALLOCATION_TLV));
2427 if (SHMEM2_HAS(bp, afex_driver_support))
2428 SHMEM2_WR(bp, afex_driver_support,
2429 SHMEM_AFEX_SUPPORTED_VERSION_ONE);
2430 }
2431
2432 /* Set AFEX default VLAN tag to an invalid value */
2433 bp->afex_def_vlan_tag = -1;
2434 }
2435
2436 /**
2437 * bnx2x_bz_fp - zero content of the fastpath structure.
2438 *
2439 * @bp: driver handle
2440 * @index: fastpath index to be zeroed
2441 *
2442 * Makes sure the contents of the bp->fp[index].napi is kept
2443 * intact.
2444 */
2445 static void bnx2x_bz_fp(struct bnx2x *bp, int index)
2446 {
2447 struct bnx2x_fastpath *fp = &bp->fp[index];
2448 int cos;
2449 struct napi_struct orig_napi = fp->napi;
2450 struct bnx2x_agg_info *orig_tpa_info = fp->tpa_info;
2451
2452 /* bzero bnx2x_fastpath contents */
2453 if (fp->tpa_info)
2454 memset(fp->tpa_info, 0, ETH_MAX_AGGREGATION_QUEUES_E1H_E2 *
2455 sizeof(struct bnx2x_agg_info));
2456 memset(fp, 0, sizeof(*fp));
2457
2458 /* Restore the NAPI object as it has been already initialized */
2459 fp->napi = orig_napi;
2460 fp->tpa_info = orig_tpa_info;
2461 fp->bp = bp;
2462 fp->index = index;
2463 if (IS_ETH_FP(fp))
2464 fp->max_cos = bp->max_cos;
2465 else
2466 /* Special queues support only one CoS */
2467 fp->max_cos = 1;
2468
2469 /* Init txdata pointers */
2470 if (IS_FCOE_FP(fp))
2471 fp->txdata_ptr[0] = &bp->bnx2x_txq[FCOE_TXQ_IDX(bp)];
2472 if (IS_ETH_FP(fp))
2473 for_each_cos_in_tx_queue(fp, cos)
2474 fp->txdata_ptr[cos] = &bp->bnx2x_txq[cos *
2475 BNX2X_NUM_ETH_QUEUES(bp) + index];
2476
2477 /* set the tpa flag for each queue. The tpa flag determines the queue
2478 * minimal size so it must be set prior to queue memory allocation
2479 */
2480 fp->disable_tpa = !(bp->flags & TPA_ENABLE_FLAG ||
2481 (bp->flags & GRO_ENABLE_FLAG &&
2482 bnx2x_mtu_allows_gro(bp->dev->mtu)));
2483 if (bp->flags & TPA_ENABLE_FLAG)
2484 fp->mode = TPA_MODE_LRO;
2485 else if (bp->flags & GRO_ENABLE_FLAG)
2486 fp->mode = TPA_MODE_GRO;
2487
2488 /* We don't want TPA on an FCoE L2 ring */
2489 if (IS_FCOE_FP(fp))
2490 fp->disable_tpa = 1;
2491 }
2492
2493 int bnx2x_load_cnic(struct bnx2x *bp)
2494 {
2495 int i, rc, port = BP_PORT(bp);
2496
2497 DP(NETIF_MSG_IFUP, "Starting CNIC-related load\n");
2498
2499 mutex_init(&bp->cnic_mutex);
2500
2501 if (IS_PF(bp)) {
2502 rc = bnx2x_alloc_mem_cnic(bp);
2503 if (rc) {
2504 BNX2X_ERR("Unable to allocate bp memory for cnic\n");
2505 LOAD_ERROR_EXIT_CNIC(bp, load_error_cnic0);
2506 }
2507 }
2508
2509 rc = bnx2x_alloc_fp_mem_cnic(bp);
2510 if (rc) {
2511 BNX2X_ERR("Unable to allocate memory for cnic fps\n");
2512 LOAD_ERROR_EXIT_CNIC(bp, load_error_cnic0);
2513 }
2514
2515 /* Update the number of queues with the cnic queues */
2516 rc = bnx2x_set_real_num_queues(bp, 1);
2517 if (rc) {
2518 BNX2X_ERR("Unable to set real_num_queues including cnic\n");
2519 LOAD_ERROR_EXIT_CNIC(bp, load_error_cnic0);
2520 }
2521
2522 /* Add all CNIC NAPI objects */
2523 bnx2x_add_all_napi_cnic(bp);
2524 DP(NETIF_MSG_IFUP, "cnic napi added\n");
2525 bnx2x_napi_enable_cnic(bp);
2526
2527 rc = bnx2x_init_hw_func_cnic(bp);
2528 if (rc)
2529 LOAD_ERROR_EXIT_CNIC(bp, load_error_cnic1);
2530
2531 bnx2x_nic_init_cnic(bp);
2532
2533 if (IS_PF(bp)) {
2534 /* Enable Timer scan */
2535 REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + port*4, 1);
2536
2537 /* setup cnic queues */
2538 for_each_cnic_queue(bp, i) {
2539 rc = bnx2x_setup_queue(bp, &bp->fp[i], 0);
2540 if (rc) {
2541 BNX2X_ERR("Queue setup failed\n");
2542 LOAD_ERROR_EXIT(bp, load_error_cnic2);
2543 }
2544 }
2545 }
2546
2547 /* Initialize Rx filter. */
2548 bnx2x_set_rx_mode_inner(bp);
2549
2550 /* re-read iscsi info */
2551 bnx2x_get_iscsi_info(bp);
2552 bnx2x_setup_cnic_irq_info(bp);
2553 bnx2x_setup_cnic_info(bp);
2554 bp->cnic_loaded = true;
2555 if (bp->state == BNX2X_STATE_OPEN)
2556 bnx2x_cnic_notify(bp, CNIC_CTL_START_CMD);
2557
2558 DP(NETIF_MSG_IFUP, "Ending successfully CNIC-related load\n");
2559
2560 return 0;
2561
2562 #ifndef BNX2X_STOP_ON_ERROR
2563 load_error_cnic2:
2564 /* Disable Timer scan */
2565 REG_WR(bp, TM_REG_EN_LINEAR0_TIMER + port*4, 0);
2566
2567 load_error_cnic1:
2568 bnx2x_napi_disable_cnic(bp);
2569 /* Update the number of queues without the cnic queues */
2570 if (bnx2x_set_real_num_queues(bp, 0))
2571 BNX2X_ERR("Unable to set real_num_queues not including cnic\n");
2572 load_error_cnic0:
2573 BNX2X_ERR("CNIC-related load failed\n");
2574 bnx2x_free_fp_mem_cnic(bp);
2575 bnx2x_free_mem_cnic(bp);
2576 return rc;
2577 #endif /* ! BNX2X_STOP_ON_ERROR */
2578 }
2579
2580 /* must be called with rtnl_lock */
2581 int bnx2x_nic_load(struct bnx2x *bp, int load_mode)
2582 {
2583 int port = BP_PORT(bp);
2584 int i, rc = 0, load_code = 0;
2585
2586 DP(NETIF_MSG_IFUP, "Starting NIC load\n");
2587 DP(NETIF_MSG_IFUP,
2588 "CNIC is %s\n", CNIC_ENABLED(bp) ? "enabled" : "disabled");
2589
2590 #ifdef BNX2X_STOP_ON_ERROR
2591 if (unlikely(bp->panic)) {
2592 BNX2X_ERR("Can't load NIC when there is panic\n");
2593 return -EPERM;
2594 }
2595 #endif
2596
2597 bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD;
2598
2599 /* zero the structure w/o any lock, before SP handler is initialized */
2600 memset(&bp->last_reported_link, 0, sizeof(bp->last_reported_link));
2601 __set_bit(BNX2X_LINK_REPORT_LINK_DOWN,
2602 &bp->last_reported_link.link_report_flags);
2603
2604 if (IS_PF(bp))
2605 /* must be called before memory allocation and HW init */
2606 bnx2x_ilt_set_info(bp);
2607
2608 /*
2609 * Zero fastpath structures preserving invariants like napi, which are
2610 * allocated only once, fp index, max_cos, bp pointer.
2611 * Also set fp->disable_tpa and txdata_ptr.
2612 */
2613 DP(NETIF_MSG_IFUP, "num queues: %d", bp->num_queues);
2614 for_each_queue(bp, i)
2615 bnx2x_bz_fp(bp, i);
2616 memset(bp->bnx2x_txq, 0, (BNX2X_MAX_RSS_COUNT(bp) * BNX2X_MULTI_TX_COS +
2617 bp->num_cnic_queues) *
2618 sizeof(struct bnx2x_fp_txdata));
2619
2620 bp->fcoe_init = false;
2621
2622 /* Set the receive queues buffer size */
2623 bnx2x_set_rx_buf_size(bp);
2624
2625 if (IS_PF(bp)) {
2626 rc = bnx2x_alloc_mem(bp);
2627 if (rc) {
2628 BNX2X_ERR("Unable to allocate bp memory\n");
2629 return rc;
2630 }
2631 }
2632
2633 /* need to be done after alloc mem, since it's self adjusting to amount
2634 * of memory available for RSS queues
2635 */
2636 rc = bnx2x_alloc_fp_mem(bp);
2637 if (rc) {
2638 BNX2X_ERR("Unable to allocate memory for fps\n");
2639 LOAD_ERROR_EXIT(bp, load_error0);
2640 }
2641
2642 /* Allocated memory for FW statistics */
2643 if (bnx2x_alloc_fw_stats_mem(bp))
2644 LOAD_ERROR_EXIT(bp, load_error0);
2645
2646 /* request pf to initialize status blocks */
2647 if (IS_VF(bp)) {
2648 rc = bnx2x_vfpf_init(bp);
2649 if (rc)
2650 LOAD_ERROR_EXIT(bp, load_error0);
2651 }
2652
2653 /* As long as bnx2x_alloc_mem() may possibly update
2654 * bp->num_queues, bnx2x_set_real_num_queues() should always
2655 * come after it. At this stage cnic queues are not counted.
2656 */
2657 rc = bnx2x_set_real_num_queues(bp, 0);
2658 if (rc) {
2659 BNX2X_ERR("Unable to set real_num_queues\n");
2660 LOAD_ERROR_EXIT(bp, load_error0);
2661 }
2662
2663 /* configure multi cos mappings in kernel.
2664 * this configuration may be overridden by a multi class queue
2665 * discipline or by a dcbx negotiation result.
2666 */
2667 bnx2x_setup_tc(bp->dev, bp->max_cos);
2668
2669 /* Add all NAPI objects */
2670 bnx2x_add_all_napi(bp);
2671 DP(NETIF_MSG_IFUP, "napi added\n");
2672 bnx2x_napi_enable(bp);
2673
2674 if (IS_PF(bp)) {
2675 /* set pf load just before approaching the MCP */
2676 bnx2x_set_pf_load(bp);
2677
2678 /* if mcp exists send load request and analyze response */
2679 if (!BP_NOMCP(bp)) {
2680 /* attempt to load pf */
2681 rc = bnx2x_nic_load_request(bp, &load_code);
2682 if (rc)
2683 LOAD_ERROR_EXIT(bp, load_error1);
2684
2685 /* what did mcp say? */
2686 rc = bnx2x_compare_fw_ver(bp, load_code, true);
2687 if (rc) {
2688 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
2689 LOAD_ERROR_EXIT(bp, load_error2);
2690 }
2691 } else {
2692 load_code = bnx2x_nic_load_no_mcp(bp, port);
2693 }
2694
2695 /* mark pmf if applicable */
2696 bnx2x_nic_load_pmf(bp, load_code);
2697
2698 /* Init Function state controlling object */
2699 bnx2x__init_func_obj(bp);
2700
2701 /* Initialize HW */
2702 rc = bnx2x_init_hw(bp, load_code);
2703 if (rc) {
2704 BNX2X_ERR("HW init failed, aborting\n");
2705 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
2706 LOAD_ERROR_EXIT(bp, load_error2);
2707 }
2708 }
2709
2710 bnx2x_pre_irq_nic_init(bp);
2711
2712 /* Connect to IRQs */
2713 rc = bnx2x_setup_irqs(bp);
2714 if (rc) {
2715 BNX2X_ERR("setup irqs failed\n");
2716 if (IS_PF(bp))
2717 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
2718 LOAD_ERROR_EXIT(bp, load_error2);
2719 }
2720
2721 /* Init per-function objects */
2722 if (IS_PF(bp)) {
2723 /* Setup NIC internals and enable interrupts */
2724 bnx2x_post_irq_nic_init(bp, load_code);
2725
2726 bnx2x_init_bp_objs(bp);
2727 bnx2x_iov_nic_init(bp);
2728
2729 /* Set AFEX default VLAN tag to an invalid value */
2730 bp->afex_def_vlan_tag = -1;
2731 bnx2x_nic_load_afex_dcc(bp, load_code);
2732 bp->state = BNX2X_STATE_OPENING_WAIT4_PORT;
2733 rc = bnx2x_func_start(bp);
2734 if (rc) {
2735 BNX2X_ERR("Function start failed!\n");
2736 bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE, 0);
2737
2738 LOAD_ERROR_EXIT(bp, load_error3);
2739 }
2740
2741 /* Send LOAD_DONE command to MCP */
2742 if (!BP_NOMCP(bp)) {
2743 load_code = bnx2x_fw_command(bp,
2744 DRV_MSG_CODE_LOAD_DONE, 0);
2745 if (!load_code) {
2746 BNX2X_ERR("MCP response failure, aborting\n");
2747 rc = -EBUSY;
2748 LOAD_ERROR_EXIT(bp, load_error3);
2749 }
2750 }
2751
2752 /* initialize FW coalescing state machines in RAM */
2753 bnx2x_update_coalesce(bp);
2754 }
2755
2756 /* setup the leading queue */
2757 rc = bnx2x_setup_leading(bp);
2758 if (rc) {
2759 BNX2X_ERR("Setup leading failed!\n");
2760 LOAD_ERROR_EXIT(bp, load_error3);
2761 }
2762
2763 /* set up the rest of the queues */
2764 for_each_nondefault_eth_queue(bp, i) {
2765 if (IS_PF(bp))
2766 rc = bnx2x_setup_queue(bp, &bp->fp[i], false);
2767 else /* VF */
2768 rc = bnx2x_vfpf_setup_q(bp, &bp->fp[i], false);
2769 if (rc) {
2770 BNX2X_ERR("Queue %d setup failed\n", i);
2771 LOAD_ERROR_EXIT(bp, load_error3);
2772 }
2773 }
2774
2775 /* setup rss */
2776 rc = bnx2x_init_rss(bp);
2777 if (rc) {
2778 BNX2X_ERR("PF RSS init failed\n");
2779 LOAD_ERROR_EXIT(bp, load_error3);
2780 }
2781
2782 /* Now when Clients are configured we are ready to work */
2783 bp->state = BNX2X_STATE_OPEN;
2784
2785 /* Configure a ucast MAC */
2786 if (IS_PF(bp))
2787 rc = bnx2x_set_eth_mac(bp, true);
2788 else /* vf */
2789 rc = bnx2x_vfpf_config_mac(bp, bp->dev->dev_addr, bp->fp->index,
2790 true);
2791 if (rc) {
2792 BNX2X_ERR("Setting Ethernet MAC failed\n");
2793 LOAD_ERROR_EXIT(bp, load_error3);
2794 }
2795
2796 if (IS_PF(bp) && bp->pending_max) {
2797 bnx2x_update_max_mf_config(bp, bp->pending_max);
2798 bp->pending_max = 0;
2799 }
2800
2801 if (bp->port.pmf) {
2802 rc = bnx2x_initial_phy_init(bp, load_mode);
2803 if (rc)
2804 LOAD_ERROR_EXIT(bp, load_error3);
2805 }
2806 bp->link_params.feature_config_flags &= ~FEATURE_CONFIG_BOOT_FROM_SAN;
2807
2808 /* Start fast path */
2809
2810 /* Initialize Rx filter. */
2811 bnx2x_set_rx_mode_inner(bp);
2812
2813 if (bp->flags & PTP_SUPPORTED) {
2814 bnx2x_init_ptp(bp);
2815 bnx2x_configure_ptp_filters(bp);
2816 }
2817 /* Start Tx */
2818 switch (load_mode) {
2819 case LOAD_NORMAL:
2820 /* Tx queue should be only re-enabled */
2821 netif_tx_wake_all_queues(bp->dev);
2822 break;
2823
2824 case LOAD_OPEN:
2825 netif_tx_start_all_queues(bp->dev);
2826 smp_mb__after_atomic();
2827 break;
2828
2829 case LOAD_DIAG:
2830 case LOAD_LOOPBACK_EXT:
2831 bp->state = BNX2X_STATE_DIAG;
2832 break;
2833
2834 default:
2835 break;
2836 }
2837
2838 if (bp->port.pmf)
2839 bnx2x_update_drv_flags(bp, 1 << DRV_FLAGS_PORT_MASK, 0);
2840 else
2841 bnx2x__link_status_update(bp);
2842
2843 /* start the timer */
2844 mod_timer(&bp->timer, jiffies + bp->current_interval);
2845
2846 if (CNIC_ENABLED(bp))
2847 bnx2x_load_cnic(bp);
2848
2849 if (IS_PF(bp))
2850 bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_GET_DRV_VERSION, 0);
2851
2852 if (IS_PF(bp) && SHMEM2_HAS(bp, drv_capabilities_flag)) {
2853 /* mark driver is loaded in shmem2 */
2854 u32 val;
2855 val = SHMEM2_RD(bp, drv_capabilities_flag[BP_FW_MB_IDX(bp)]);
2856 SHMEM2_WR(bp, drv_capabilities_flag[BP_FW_MB_IDX(bp)],
2857 val | DRV_FLAGS_CAPABILITIES_LOADED_SUPPORTED |
2858 DRV_FLAGS_CAPABILITIES_LOADED_L2);
2859 }
2860
2861 /* Wait for all pending SP commands to complete */
2862 if (IS_PF(bp) && !bnx2x_wait_sp_comp(bp, ~0x0UL)) {
2863 BNX2X_ERR("Timeout waiting for SP elements to complete\n");
2864 bnx2x_nic_unload(bp, UNLOAD_CLOSE, false);
2865 return -EBUSY;
2866 }
2867
2868 /* If PMF - send ADMIN DCBX msg to MFW to initiate DCBX FSM */
2869 if (bp->port.pmf && (bp->state != BNX2X_STATE_DIAG))
2870 bnx2x_dcbx_init(bp, false);
2871
2872 DP(NETIF_MSG_IFUP, "Ending successfully NIC load\n");
2873
2874 return 0;
2875
2876 #ifndef BNX2X_STOP_ON_ERROR
2877 load_error3:
2878 if (IS_PF(bp)) {
2879 bnx2x_int_disable_sync(bp, 1);
2880
2881 /* Clean queueable objects */
2882 bnx2x_squeeze_objects(bp);
2883 }
2884
2885 /* Free SKBs, SGEs, TPA pool and driver internals */
2886 bnx2x_free_skbs(bp);
2887 for_each_rx_queue(bp, i)
2888 bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);
2889
2890 /* Release IRQs */
2891 bnx2x_free_irq(bp);
2892 load_error2:
2893 if (IS_PF(bp) && !BP_NOMCP(bp)) {
2894 bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP, 0);
2895 bnx2x_fw_command(bp, DRV_MSG_CODE_UNLOAD_DONE, 0);
2896 }
2897
2898 bp->port.pmf = 0;
2899 load_error1:
2900 bnx2x_napi_disable(bp);
2901 bnx2x_del_all_napi(bp);
2902
2903 /* clear pf_load status, as it was already set */
2904 if (IS_PF(bp))
2905 bnx2x_clear_pf_load(bp);
2906 load_error0:
2907 bnx2x_free_fw_stats_mem(bp);
2908 bnx2x_free_fp_mem(bp);
2909 bnx2x_free_mem(bp);
2910
2911 return rc;
2912 #endif /* ! BNX2X_STOP_ON_ERROR */
2913 }
2914
2915 int bnx2x_drain_tx_queues(struct bnx2x *bp)
2916 {
2917 u8 rc = 0, cos, i;
2918
2919 /* Wait until tx fastpath tasks complete */
2920 for_each_tx_queue(bp, i) {
2921 struct bnx2x_fastpath *fp = &bp->fp[i];
2922
2923 for_each_cos_in_tx_queue(fp, cos)
2924 rc = bnx2x_clean_tx_queue(bp, fp->txdata_ptr[cos]);
2925 if (rc)
2926 return rc;
2927 }
2928 return 0;
2929 }
2930
2931 /* must be called with rtnl_lock */
2932 int bnx2x_nic_unload(struct bnx2x *bp, int unload_mode, bool keep_link)
2933 {
2934 int i;
2935 bool global = false;
2936
2937 DP(NETIF_MSG_IFUP, "Starting NIC unload\n");
2938
2939 /* mark driver is unloaded in shmem2 */
2940 if (IS_PF(bp) && SHMEM2_HAS(bp, drv_capabilities_flag)) {
2941 u32 val;
2942 val = SHMEM2_RD(bp, drv_capabilities_flag[BP_FW_MB_IDX(bp)]);
2943 SHMEM2_WR(bp, drv_capabilities_flag[BP_FW_MB_IDX(bp)],
2944 val & ~DRV_FLAGS_CAPABILITIES_LOADED_L2);
2945 }
2946
2947 if (IS_PF(bp) && bp->recovery_state != BNX2X_RECOVERY_DONE &&
2948 (bp->state == BNX2X_STATE_CLOSED ||
2949 bp->state == BNX2X_STATE_ERROR)) {
2950 /* We can get here if the driver has been unloaded
2951 * during parity error recovery and is either waiting for a
2952 * leader to complete or for other functions to unload and
2953 * then ifdown has been issued. In this case we want to
2954 * unload and let other functions to complete a recovery
2955 * process.
2956 */
2957 bp->recovery_state = BNX2X_RECOVERY_DONE;
2958 bp->is_leader = 0;
2959 bnx2x_release_leader_lock(bp);
2960 smp_mb();
2961
2962 DP(NETIF_MSG_IFDOWN, "Releasing a leadership...\n");
2963 BNX2X_ERR("Can't unload in closed or error state\n");
2964 return -EINVAL;
2965 }
2966
2967 /* Nothing to do during unload if previous bnx2x_nic_load()
2968 * have not completed successfully - all resources are released.
2969 *
2970 * we can get here only after unsuccessful ndo_* callback, during which
2971 * dev->IFF_UP flag is still on.
2972 */
2973 if (bp->state == BNX2X_STATE_CLOSED || bp->state == BNX2X_STATE_ERROR)
2974 return 0;
2975
2976 /* It's important to set the bp->state to the value different from
2977 * BNX2X_STATE_OPEN and only then stop the Tx. Otherwise bnx2x_tx_int()
2978 * may restart the Tx from the NAPI context (see bnx2x_tx_int()).
2979 */
2980 bp->state = BNX2X_STATE_CLOSING_WAIT4_HALT;
2981 smp_mb();
2982
2983 /* indicate to VFs that the PF is going down */
2984 bnx2x_iov_channel_down(bp);
2985
2986 if (CNIC_LOADED(bp))
2987 bnx2x_cnic_notify(bp, CNIC_CTL_STOP_CMD);
2988
2989 /* Stop Tx */
2990 bnx2x_tx_disable(bp);
2991 netdev_reset_tc(bp->dev);
2992
2993 bp->rx_mode = BNX2X_RX_MODE_NONE;
2994
2995 del_timer_sync(&bp->timer);
2996
2997 if (IS_PF(bp)) {
2998 /* Set ALWAYS_ALIVE bit in shmem */
2999 bp->fw_drv_pulse_wr_seq |= DRV_PULSE_ALWAYS_ALIVE;
3000 bnx2x_drv_pulse(bp);
3001 bnx2x_stats_handle(bp, STATS_EVENT_STOP);
3002 bnx2x_save_statistics(bp);
3003 }
3004
3005 /* wait till consumers catch up with producers in all queues */
3006 bnx2x_drain_tx_queues(bp);
3007
3008 /* if VF indicate to PF this function is going down (PF will delete sp
3009 * elements and clear initializations
3010 */
3011 if (IS_VF(bp))
3012 bnx2x_vfpf_close_vf(bp);
3013 else if (unload_mode != UNLOAD_RECOVERY)
3014 /* if this is a normal/close unload need to clean up chip*/
3015 bnx2x_chip_cleanup(bp, unload_mode, keep_link);
3016 else {
3017 /* Send the UNLOAD_REQUEST to the MCP */
3018 bnx2x_send_unload_req(bp, unload_mode);
3019
3020 /* Prevent transactions to host from the functions on the
3021 * engine that doesn't reset global blocks in case of global
3022 * attention once global blocks are reset and gates are opened
3023 * (the engine which leader will perform the recovery
3024 * last).
3025 */
3026 if (!CHIP_IS_E1x(bp))
3027 bnx2x_pf_disable(bp);
3028
3029 /* Disable HW interrupts, NAPI */
3030 bnx2x_netif_stop(bp, 1);
3031 /* Delete all NAPI objects */
3032 bnx2x_del_all_napi(bp);
3033 if (CNIC_LOADED(bp))
3034 bnx2x_del_all_napi_cnic(bp);
3035 /* Release IRQs */
3036 bnx2x_free_irq(bp);
3037
3038 /* Report UNLOAD_DONE to MCP */
3039 bnx2x_send_unload_done(bp, false);
3040 }
3041
3042 /*
3043 * At this stage no more interrupts will arrive so we may safely clean
3044 * the queueable objects here in case they failed to get cleaned so far.
3045 */
3046 if (IS_PF(bp))
3047 bnx2x_squeeze_objects(bp);
3048
3049 /* There should be no more pending SP commands at this stage */
3050 bp->sp_state = 0;
3051
3052 bp->port.pmf = 0;
3053
3054 /* clear pending work in rtnl task */
3055 bp->sp_rtnl_state = 0;
3056 smp_mb();
3057
3058 /* Free SKBs, SGEs, TPA pool and driver internals */
3059 bnx2x_free_skbs(bp);
3060 if (CNIC_LOADED(bp))
3061 bnx2x_free_skbs_cnic(bp);
3062 for_each_rx_queue(bp, i)
3063 bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);
3064
3065 bnx2x_free_fp_mem(bp);
3066 if (CNIC_LOADED(bp))
3067 bnx2x_free_fp_mem_cnic(bp);
3068
3069 if (IS_PF(bp)) {
3070 if (CNIC_LOADED(bp))
3071 bnx2x_free_mem_cnic(bp);
3072 }
3073 bnx2x_free_mem(bp);
3074
3075 bp->state = BNX2X_STATE_CLOSED;
3076 bp->cnic_loaded = false;
3077
3078 /* Clear driver version indication in shmem */
3079 if (IS_PF(bp))
3080 bnx2x_update_mng_version(bp);
3081
3082 /* Check if there are pending parity attentions. If there are - set
3083 * RECOVERY_IN_PROGRESS.
3084 */
3085 if (IS_PF(bp) && bnx2x_chk_parity_attn(bp, &global, false)) {
3086 bnx2x_set_reset_in_progress(bp);
3087
3088 /* Set RESET_IS_GLOBAL if needed */
3089 if (global)
3090 bnx2x_set_reset_global(bp);
3091 }
3092
3093 /* The last driver must disable a "close the gate" if there is no
3094 * parity attention or "process kill" pending.
3095 */
3096 if (IS_PF(bp) &&
3097 !bnx2x_clear_pf_load(bp) &&
3098 bnx2x_reset_is_done(bp, BP_PATH(bp)))
3099 bnx2x_disable_close_the_gate(bp);
3100
3101 DP(NETIF_MSG_IFUP, "Ending NIC unload\n");
3102
3103 return 0;
3104 }
3105
3106 int bnx2x_set_power_state(struct bnx2x *bp, pci_power_t state)
3107 {
3108 u16 pmcsr;
3109
3110 /* If there is no power capability, silently succeed */
3111 if (!bp->pdev->pm_cap) {
3112 BNX2X_DEV_INFO("No power capability. Breaking.\n");
3113 return 0;
3114 }
3115
3116 pci_read_config_word(bp->pdev, bp->pdev->pm_cap + PCI_PM_CTRL, &pmcsr);
3117
3118 switch (state) {
3119 case PCI_D0:
3120 pci_write_config_word(bp->pdev, bp->pdev->pm_cap + PCI_PM_CTRL,
3121 ((pmcsr & ~PCI_PM_CTRL_STATE_MASK) |
3122 PCI_PM_CTRL_PME_STATUS));
3123
3124 if (pmcsr & PCI_PM_CTRL_STATE_MASK)
3125 /* delay required during transition out of D3hot */
3126 msleep(20);
3127 break;
3128
3129 case PCI_D3hot:
3130 /* If there are other clients above don't
3131 shut down the power */
3132 if (atomic_read(&bp->pdev->enable_cnt) != 1)
3133 return 0;
3134 /* Don't shut down the power for emulation and FPGA */
3135 if (CHIP_REV_IS_SLOW(bp))
3136 return 0;
3137
3138 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
3139 pmcsr |= 3;
3140
3141 if (bp->wol)
3142 pmcsr |= PCI_PM_CTRL_PME_ENABLE;
3143
3144 pci_write_config_word(bp->pdev, bp->pdev->pm_cap + PCI_PM_CTRL,
3145 pmcsr);
3146
3147 /* No more memory access after this point until
3148 * device is brought back to D0.
3149 */
3150 break;
3151
3152 default:
3153 dev_err(&bp->pdev->dev, "Can't support state = %d\n", state);
3154 return -EINVAL;
3155 }
3156 return 0;
3157 }
3158
3159 /*
3160 * net_device service functions
3161 */
3162 static int bnx2x_poll(struct napi_struct *napi, int budget)
3163 {
3164 int work_done = 0;
3165 u8 cos;
3166 struct bnx2x_fastpath *fp = container_of(napi, struct bnx2x_fastpath,
3167 napi);
3168 struct bnx2x *bp = fp->bp;
3169
3170 while (1) {
3171 #ifdef BNX2X_STOP_ON_ERROR
3172 if (unlikely(bp->panic)) {
3173 napi_complete(napi);
3174 return 0;
3175 }
3176 #endif
3177 if (!bnx2x_fp_lock_napi(fp))
3178 return budget;
3179
3180 for_each_cos_in_tx_queue(fp, cos)
3181 if (bnx2x_tx_queue_has_work(fp->txdata_ptr[cos]))
3182 bnx2x_tx_int(bp, fp->txdata_ptr[cos]);
3183
3184 if (bnx2x_has_rx_work(fp)) {
3185 work_done += bnx2x_rx_int(fp, budget - work_done);
3186
3187 /* must not complete if we consumed full budget */
3188 if (work_done >= budget) {
3189 bnx2x_fp_unlock_napi(fp);
3190 break;
3191 }
3192 }
3193
3194 bnx2x_fp_unlock_napi(fp);
3195
3196 /* Fall out from the NAPI loop if needed */
3197 if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) {
3198
3199 /* No need to update SB for FCoE L2 ring as long as
3200 * it's connected to the default SB and the SB
3201 * has been updated when NAPI was scheduled.
3202 */
3203 if (IS_FCOE_FP(fp)) {
3204 napi_complete(napi);
3205 break;
3206 }
3207 bnx2x_update_fpsb_idx(fp);
3208 /* bnx2x_has_rx_work() reads the status block,
3209 * thus we need to ensure that status block indices
3210 * have been actually read (bnx2x_update_fpsb_idx)
3211 * prior to this check (bnx2x_has_rx_work) so that
3212 * we won't write the "newer" value of the status block
3213 * to IGU (if there was a DMA right after
3214 * bnx2x_has_rx_work and if there is no rmb, the memory
3215 * reading (bnx2x_update_fpsb_idx) may be postponed
3216 * to right before bnx2x_ack_sb). In this case there
3217 * will never be another interrupt until there is
3218 * another update of the status block, while there
3219 * is still unhandled work.
3220 */
3221 rmb();
3222
3223 if (!(bnx2x_has_rx_work(fp) || bnx2x_has_tx_work(fp))) {
3224 napi_complete(napi);
3225 /* Re-enable interrupts */
3226 DP(NETIF_MSG_RX_STATUS,
3227 "Update index to %d\n", fp->fp_hc_idx);
3228 bnx2x_ack_sb(bp, fp->igu_sb_id, USTORM_ID,
3229 le16_to_cpu(fp->fp_hc_idx),
3230 IGU_INT_ENABLE, 1);
3231 break;
3232 }
3233 }
3234 }
3235
3236 return work_done;
3237 }
3238
3239 #ifdef CONFIG_NET_RX_BUSY_POLL
3240 /* must be called with local_bh_disable()d */
3241 int bnx2x_low_latency_recv(struct napi_struct *napi)
3242 {
3243 struct bnx2x_fastpath *fp = container_of(napi, struct bnx2x_fastpath,
3244 napi);
3245 struct bnx2x *bp = fp->bp;
3246 int found = 0;
3247
3248 if ((bp->state == BNX2X_STATE_CLOSED) ||
3249 (bp->state == BNX2X_STATE_ERROR) ||
3250 (bp->flags & (TPA_ENABLE_FLAG | GRO_ENABLE_FLAG)))
3251 return LL_FLUSH_FAILED;
3252
3253 if (!bnx2x_fp_lock_poll(fp))
3254 return LL_FLUSH_BUSY;
3255
3256 if (bnx2x_has_rx_work(fp))
3257 found = bnx2x_rx_int(fp, 4);
3258
3259 bnx2x_fp_unlock_poll(fp);
3260
3261 return found;
3262 }
3263 #endif
3264
3265 /* we split the first BD into headers and data BDs
3266 * to ease the pain of our fellow microcode engineers
3267 * we use one mapping for both BDs
3268 */
3269 static u16 bnx2x_tx_split(struct bnx2x *bp,
3270 struct bnx2x_fp_txdata *txdata,
3271 struct sw_tx_bd *tx_buf,
3272 struct eth_tx_start_bd **tx_bd, u16 hlen,
3273 u16 bd_prod)
3274 {
3275 struct eth_tx_start_bd *h_tx_bd = *tx_bd;
3276 struct eth_tx_bd *d_tx_bd;
3277 dma_addr_t mapping;
3278 int old_len = le16_to_cpu(h_tx_bd->nbytes);
3279
3280 /* first fix first BD */
3281 h_tx_bd->nbytes = cpu_to_le16(hlen);
3282
3283 DP(NETIF_MSG_TX_QUEUED, "TSO split header size is %d (%x:%x)\n",
3284 h_tx_bd->nbytes, h_tx_bd->addr_hi, h_tx_bd->addr_lo);
3285
3286 /* now get a new data BD
3287 * (after the pbd) and fill it */
3288 bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
3289 d_tx_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
3290
3291 mapping = HILO_U64(le32_to_cpu(h_tx_bd->addr_hi),
3292 le32_to_cpu(h_tx_bd->addr_lo)) + hlen;
3293
3294 d_tx_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
3295 d_tx_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
3296 d_tx_bd->nbytes = cpu_to_le16(old_len - hlen);
3297
3298 /* this marks the BD as one that has no individual mapping */
3299 tx_buf->flags |= BNX2X_TSO_SPLIT_BD;
3300
3301 DP(NETIF_MSG_TX_QUEUED,
3302 "TSO split data size is %d (%x:%x)\n",
3303 d_tx_bd->nbytes, d_tx_bd->addr_hi, d_tx_bd->addr_lo);
3304
3305 /* update tx_bd */
3306 *tx_bd = (struct eth_tx_start_bd *)d_tx_bd;
3307
3308 return bd_prod;
3309 }
3310
3311 #define bswab32(b32) ((__force __le32) swab32((__force __u32) (b32)))
3312 #define bswab16(b16) ((__force __le16) swab16((__force __u16) (b16)))
3313 static __le16 bnx2x_csum_fix(unsigned char *t_header, u16 csum, s8 fix)
3314 {
3315 __sum16 tsum = (__force __sum16) csum;
3316
3317 if (fix > 0)
3318 tsum = ~csum_fold(csum_sub((__force __wsum) csum,
3319 csum_partial(t_header - fix, fix, 0)));
3320
3321 else if (fix < 0)
3322 tsum = ~csum_fold(csum_add((__force __wsum) csum,
3323 csum_partial(t_header, -fix, 0)));
3324
3325 return bswab16(tsum);
3326 }
3327
3328 static u32 bnx2x_xmit_type(struct bnx2x *bp, struct sk_buff *skb)
3329 {
3330 u32 rc;
3331 __u8 prot = 0;
3332 __be16 protocol;
3333
3334 if (skb->ip_summed != CHECKSUM_PARTIAL)
3335 return XMIT_PLAIN;
3336
3337 protocol = vlan_get_protocol(skb);
3338 if (protocol == htons(ETH_P_IPV6)) {
3339 rc = XMIT_CSUM_V6;
3340 prot = ipv6_hdr(skb)->nexthdr;
3341 } else {
3342 rc = XMIT_CSUM_V4;
3343 prot = ip_hdr(skb)->protocol;
3344 }
3345
3346 if (!CHIP_IS_E1x(bp) && skb->encapsulation) {
3347 if (inner_ip_hdr(skb)->version == 6) {
3348 rc |= XMIT_CSUM_ENC_V6;
3349 if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3350 rc |= XMIT_CSUM_TCP;
3351 } else {
3352 rc |= XMIT_CSUM_ENC_V4;
3353 if (inner_ip_hdr(skb)->protocol == IPPROTO_TCP)
3354 rc |= XMIT_CSUM_TCP;
3355 }
3356 }
3357 if (prot == IPPROTO_TCP)
3358 rc |= XMIT_CSUM_TCP;
3359
3360 if (skb_is_gso(skb)) {
3361 if (skb_is_gso_v6(skb)) {
3362 rc |= (XMIT_GSO_V6 | XMIT_CSUM_TCP);
3363 if (rc & XMIT_CSUM_ENC)
3364 rc |= XMIT_GSO_ENC_V6;
3365 } else {
3366 rc |= (XMIT_GSO_V4 | XMIT_CSUM_TCP);
3367 if (rc & XMIT_CSUM_ENC)
3368 rc |= XMIT_GSO_ENC_V4;
3369 }
3370 }
3371
3372 return rc;
3373 }
3374
3375 #if (MAX_SKB_FRAGS >= MAX_FETCH_BD - 3)
3376 /* check if packet requires linearization (packet is too fragmented)
3377 no need to check fragmentation if page size > 8K (there will be no
3378 violation to FW restrictions) */
3379 static int bnx2x_pkt_req_lin(struct bnx2x *bp, struct sk_buff *skb,
3380 u32 xmit_type)
3381 {
3382 int to_copy = 0;
3383 int hlen = 0;
3384 int first_bd_sz = 0;
3385
3386 /* 3 = 1 (for linear data BD) + 2 (for PBD and last BD) */
3387 if (skb_shinfo(skb)->nr_frags >= (MAX_FETCH_BD - 3)) {
3388
3389 if (xmit_type & XMIT_GSO) {
3390 unsigned short lso_mss = skb_shinfo(skb)->gso_size;
3391 /* Check if LSO packet needs to be copied:
3392 3 = 1 (for headers BD) + 2 (for PBD and last BD) */
3393 int wnd_size = MAX_FETCH_BD - 3;
3394 /* Number of windows to check */
3395 int num_wnds = skb_shinfo(skb)->nr_frags - wnd_size;
3396 int wnd_idx = 0;
3397 int frag_idx = 0;
3398 u32 wnd_sum = 0;
3399
3400 /* Headers length */
3401 hlen = (int)(skb_transport_header(skb) - skb->data) +
3402 tcp_hdrlen(skb);
3403
3404 /* Amount of data (w/o headers) on linear part of SKB*/
3405 first_bd_sz = skb_headlen(skb) - hlen;
3406
3407 wnd_sum = first_bd_sz;
3408
3409 /* Calculate the first sum - it's special */
3410 for (frag_idx = 0; frag_idx < wnd_size - 1; frag_idx++)
3411 wnd_sum +=
3412 skb_frag_size(&skb_shinfo(skb)->frags[frag_idx]);
3413
3414 /* If there was data on linear skb data - check it */
3415 if (first_bd_sz > 0) {
3416 if (unlikely(wnd_sum < lso_mss)) {
3417 to_copy = 1;
3418 goto exit_lbl;
3419 }
3420
3421 wnd_sum -= first_bd_sz;
3422 }
3423
3424 /* Others are easier: run through the frag list and
3425 check all windows */
3426 for (wnd_idx = 0; wnd_idx <= num_wnds; wnd_idx++) {
3427 wnd_sum +=
3428 skb_frag_size(&skb_shinfo(skb)->frags[wnd_idx + wnd_size - 1]);
3429
3430 if (unlikely(wnd_sum < lso_mss)) {
3431 to_copy = 1;
3432 break;
3433 }
3434 wnd_sum -=
3435 skb_frag_size(&skb_shinfo(skb)->frags[wnd_idx]);
3436 }
3437 } else {
3438 /* in non-LSO too fragmented packet should always
3439 be linearized */
3440 to_copy = 1;
3441 }
3442 }
3443
3444 exit_lbl:
3445 if (unlikely(to_copy))
3446 DP(NETIF_MSG_TX_QUEUED,
3447 "Linearization IS REQUIRED for %s packet. num_frags %d hlen %d first_bd_sz %d\n",
3448 (xmit_type & XMIT_GSO) ? "LSO" : "non-LSO",
3449 skb_shinfo(skb)->nr_frags, hlen, first_bd_sz);
3450
3451 return to_copy;
3452 }
3453 #endif
3454
3455 /**
3456 * bnx2x_set_pbd_gso - update PBD in GSO case.
3457 *
3458 * @skb: packet skb
3459 * @pbd: parse BD
3460 * @xmit_type: xmit flags
3461 */
3462 static void bnx2x_set_pbd_gso(struct sk_buff *skb,
3463 struct eth_tx_parse_bd_e1x *pbd,
3464 u32 xmit_type)
3465 {
3466 pbd->lso_mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
3467 pbd->tcp_send_seq = bswab32(tcp_hdr(skb)->seq);
3468 pbd->tcp_flags = pbd_tcp_flags(tcp_hdr(skb));
3469
3470 if (xmit_type & XMIT_GSO_V4) {
3471 pbd->ip_id = bswab16(ip_hdr(skb)->id);
3472 pbd->tcp_pseudo_csum =
3473 bswab16(~csum_tcpudp_magic(ip_hdr(skb)->saddr,
3474 ip_hdr(skb)->daddr,
3475 0, IPPROTO_TCP, 0));
3476 } else {
3477 pbd->tcp_pseudo_csum =
3478 bswab16(~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3479 &ipv6_hdr(skb)->daddr,
3480 0, IPPROTO_TCP, 0));
3481 }
3482
3483 pbd->global_data |=
3484 cpu_to_le16(ETH_TX_PARSE_BD_E1X_PSEUDO_CS_WITHOUT_LEN);
3485 }
3486
3487 /**
3488 * bnx2x_set_pbd_csum_enc - update PBD with checksum and return header length
3489 *
3490 * @bp: driver handle
3491 * @skb: packet skb
3492 * @parsing_data: data to be updated
3493 * @xmit_type: xmit flags
3494 *
3495 * 57712/578xx related, when skb has encapsulation
3496 */
3497 static u8 bnx2x_set_pbd_csum_enc(struct bnx2x *bp, struct sk_buff *skb,
3498 u32 *parsing_data, u32 xmit_type)
3499 {
3500 *parsing_data |=
3501 ((((u8 *)skb_inner_transport_header(skb) - skb->data) >> 1) <<
3502 ETH_TX_PARSE_BD_E2_L4_HDR_START_OFFSET_W_SHIFT) &
3503 ETH_TX_PARSE_BD_E2_L4_HDR_START_OFFSET_W;
3504
3505 if (xmit_type & XMIT_CSUM_TCP) {
3506 *parsing_data |= ((inner_tcp_hdrlen(skb) / 4) <<
3507 ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW_SHIFT) &
3508 ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW;
3509
3510 return skb_inner_transport_header(skb) +
3511 inner_tcp_hdrlen(skb) - skb->data;
3512 }
3513
3514 /* We support checksum offload for TCP and UDP only.
3515 * No need to pass the UDP header length - it's a constant.
3516 */
3517 return skb_inner_transport_header(skb) +
3518 sizeof(struct udphdr) - skb->data;
3519 }
3520
3521 /**
3522 * bnx2x_set_pbd_csum_e2 - update PBD with checksum and return header length
3523 *
3524 * @bp: driver handle
3525 * @skb: packet skb
3526 * @parsing_data: data to be updated
3527 * @xmit_type: xmit flags
3528 *
3529 * 57712/578xx related
3530 */
3531 static u8 bnx2x_set_pbd_csum_e2(struct bnx2x *bp, struct sk_buff *skb,
3532 u32 *parsing_data, u32 xmit_type)
3533 {
3534 *parsing_data |=
3535 ((((u8 *)skb_transport_header(skb) - skb->data) >> 1) <<
3536 ETH_TX_PARSE_BD_E2_L4_HDR_START_OFFSET_W_SHIFT) &
3537 ETH_TX_PARSE_BD_E2_L4_HDR_START_OFFSET_W;
3538
3539 if (xmit_type & XMIT_CSUM_TCP) {
3540 *parsing_data |= ((tcp_hdrlen(skb) / 4) <<
3541 ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW_SHIFT) &
3542 ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW;
3543
3544 return skb_transport_header(skb) + tcp_hdrlen(skb) - skb->data;
3545 }
3546 /* We support checksum offload for TCP and UDP only.
3547 * No need to pass the UDP header length - it's a constant.
3548 */
3549 return skb_transport_header(skb) + sizeof(struct udphdr) - skb->data;
3550 }
3551
3552 /* set FW indication according to inner or outer protocols if tunneled */
3553 static void bnx2x_set_sbd_csum(struct bnx2x *bp, struct sk_buff *skb,
3554 struct eth_tx_start_bd *tx_start_bd,
3555 u32 xmit_type)
3556 {
3557 tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_L4_CSUM;
3558
3559 if (xmit_type & (XMIT_CSUM_ENC_V6 | XMIT_CSUM_V6))
3560 tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_IPV6;
3561
3562 if (!(xmit_type & XMIT_CSUM_TCP))
3563 tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_IS_UDP;
3564 }
3565
3566 /**
3567 * bnx2x_set_pbd_csum - update PBD with checksum and return header length
3568 *
3569 * @bp: driver handle
3570 * @skb: packet skb
3571 * @pbd: parse BD to be updated
3572 * @xmit_type: xmit flags
3573 */
3574 static u8 bnx2x_set_pbd_csum(struct bnx2x *bp, struct sk_buff *skb,
3575 struct eth_tx_parse_bd_e1x *pbd,
3576 u32 xmit_type)
3577 {
3578 u8 hlen = (skb_network_header(skb) - skb->data) >> 1;
3579
3580 /* for now NS flag is not used in Linux */
3581 pbd->global_data =
3582 cpu_to_le16(hlen |
3583 ((skb->protocol == cpu_to_be16(ETH_P_8021Q)) <<
3584 ETH_TX_PARSE_BD_E1X_LLC_SNAP_EN_SHIFT));
3585
3586 pbd->ip_hlen_w = (skb_transport_header(skb) -
3587 skb_network_header(skb)) >> 1;
3588
3589 hlen += pbd->ip_hlen_w;
3590
3591 /* We support checksum offload for TCP and UDP only */
3592 if (xmit_type & XMIT_CSUM_TCP)
3593 hlen += tcp_hdrlen(skb) / 2;
3594 else
3595 hlen += sizeof(struct udphdr) / 2;
3596
3597 pbd->total_hlen_w = cpu_to_le16(hlen);
3598 hlen = hlen*2;
3599
3600 if (xmit_type & XMIT_CSUM_TCP) {
3601 pbd->tcp_pseudo_csum = bswab16(tcp_hdr(skb)->check);
3602
3603 } else {
3604 s8 fix = SKB_CS_OFF(skb); /* signed! */
3605
3606 DP(NETIF_MSG_TX_QUEUED,
3607 "hlen %d fix %d csum before fix %x\n",
3608 le16_to_cpu(pbd->total_hlen_w), fix, SKB_CS(skb));
3609
3610 /* HW bug: fixup the CSUM */
3611 pbd->tcp_pseudo_csum =
3612 bnx2x_csum_fix(skb_transport_header(skb),
3613 SKB_CS(skb), fix);
3614
3615 DP(NETIF_MSG_TX_QUEUED, "csum after fix %x\n",
3616 pbd->tcp_pseudo_csum);
3617 }
3618
3619 return hlen;
3620 }
3621
3622 static void bnx2x_update_pbds_gso_enc(struct sk_buff *skb,
3623 struct eth_tx_parse_bd_e2 *pbd_e2,
3624 struct eth_tx_parse_2nd_bd *pbd2,
3625 u16 *global_data,
3626 u32 xmit_type)
3627 {
3628 u16 hlen_w = 0;
3629 u8 outerip_off, outerip_len = 0;
3630
3631 /* from outer IP to transport */
3632 hlen_w = (skb_inner_transport_header(skb) -
3633 skb_network_header(skb)) >> 1;
3634
3635 /* transport len */
3636 hlen_w += inner_tcp_hdrlen(skb) >> 1;
3637
3638 pbd2->fw_ip_hdr_to_payload_w = hlen_w;
3639
3640 /* outer IP header info */
3641 if (xmit_type & XMIT_CSUM_V4) {
3642 struct iphdr *iph = ip_hdr(skb);
3643 u32 csum = (__force u32)(~iph->check) -
3644 (__force u32)iph->tot_len -
3645 (__force u32)iph->frag_off;
3646
3647 outerip_len = iph->ihl << 1;
3648
3649 pbd2->fw_ip_csum_wo_len_flags_frag =
3650 bswab16(csum_fold((__force __wsum)csum));
3651 } else {
3652 pbd2->fw_ip_hdr_to_payload_w =
3653 hlen_w - ((sizeof(struct ipv6hdr)) >> 1);
3654 pbd_e2->data.tunnel_data.flags |=
3655 ETH_TUNNEL_DATA_IP_HDR_TYPE_OUTER;
3656 }
3657
3658 pbd2->tcp_send_seq = bswab32(inner_tcp_hdr(skb)->seq);
3659
3660 pbd2->tcp_flags = pbd_tcp_flags(inner_tcp_hdr(skb));
3661
3662 /* inner IP header info */
3663 if (xmit_type & XMIT_CSUM_ENC_V4) {
3664 pbd2->hw_ip_id = bswab16(inner_ip_hdr(skb)->id);
3665
3666 pbd_e2->data.tunnel_data.pseudo_csum =
3667 bswab16(~csum_tcpudp_magic(
3668 inner_ip_hdr(skb)->saddr,
3669 inner_ip_hdr(skb)->daddr,
3670 0, IPPROTO_TCP, 0));
3671 } else {
3672 pbd_e2->data.tunnel_data.pseudo_csum =
3673 bswab16(~csum_ipv6_magic(
3674 &inner_ipv6_hdr(skb)->saddr,
3675 &inner_ipv6_hdr(skb)->daddr,
3676 0, IPPROTO_TCP, 0));
3677 }
3678
3679 outerip_off = (skb_network_header(skb) - skb->data) >> 1;
3680
3681 *global_data |=
3682 outerip_off |
3683 (outerip_len <<
3684 ETH_TX_PARSE_2ND_BD_IP_HDR_LEN_OUTER_W_SHIFT) |
3685 ((skb->protocol == cpu_to_be16(ETH_P_8021Q)) <<
3686 ETH_TX_PARSE_2ND_BD_LLC_SNAP_EN_SHIFT);
3687
3688 if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
3689 SET_FLAG(*global_data, ETH_TX_PARSE_2ND_BD_TUNNEL_UDP_EXIST, 1);
3690 pbd2->tunnel_udp_hdr_start_w = skb_transport_offset(skb) >> 1;
3691 }
3692 }
3693
3694 static inline void bnx2x_set_ipv6_ext_e2(struct sk_buff *skb, u32 *parsing_data,
3695 u32 xmit_type)
3696 {
3697 struct ipv6hdr *ipv6;
3698
3699 if (!(xmit_type & (XMIT_GSO_ENC_V6 | XMIT_GSO_V6)))
3700 return;
3701
3702 if (xmit_type & XMIT_GSO_ENC_V6)
3703 ipv6 = inner_ipv6_hdr(skb);
3704 else /* XMIT_GSO_V6 */
3705 ipv6 = ipv6_hdr(skb);
3706
3707 if (ipv6->nexthdr == NEXTHDR_IPV6)
3708 *parsing_data |= ETH_TX_PARSE_BD_E2_IPV6_WITH_EXT_HDR;
3709 }
3710
3711 /* called with netif_tx_lock
3712 * bnx2x_tx_int() runs without netif_tx_lock unless it needs to call
3713 * netif_wake_queue()
3714 */
3715 netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev)
3716 {
3717 struct bnx2x *bp = netdev_priv(dev);
3718
3719 struct netdev_queue *txq;
3720 struct bnx2x_fp_txdata *txdata;
3721 struct sw_tx_bd *tx_buf;
3722 struct eth_tx_start_bd *tx_start_bd, *first_bd;
3723 struct eth_tx_bd *tx_data_bd, *total_pkt_bd = NULL;
3724 struct eth_tx_parse_bd_e1x *pbd_e1x = NULL;
3725 struct eth_tx_parse_bd_e2 *pbd_e2 = NULL;
3726 struct eth_tx_parse_2nd_bd *pbd2 = NULL;
3727 u32 pbd_e2_parsing_data = 0;
3728 u16 pkt_prod, bd_prod;
3729 int nbd, txq_index;
3730 dma_addr_t mapping;
3731 u32 xmit_type = bnx2x_xmit_type(bp, skb);
3732 int i;
3733 u8 hlen = 0;
3734 __le16 pkt_size = 0;
3735 struct ethhdr *eth;
3736 u8 mac_type = UNICAST_ADDRESS;
3737
3738 #ifdef BNX2X_STOP_ON_ERROR
3739 if (unlikely(bp->panic))
3740 return NETDEV_TX_BUSY;
3741 #endif
3742
3743 txq_index = skb_get_queue_mapping(skb);
3744 txq = netdev_get_tx_queue(dev, txq_index);
3745
3746 BUG_ON(txq_index >= MAX_ETH_TXQ_IDX(bp) + (CNIC_LOADED(bp) ? 1 : 0));
3747
3748 txdata = &bp->bnx2x_txq[txq_index];
3749
3750 /* enable this debug print to view the transmission queue being used
3751 DP(NETIF_MSG_TX_QUEUED, "indices: txq %d, fp %d, txdata %d\n",
3752 txq_index, fp_index, txdata_index); */
3753
3754 /* enable this debug print to view the transmission details
3755 DP(NETIF_MSG_TX_QUEUED,
3756 "transmitting packet cid %d fp index %d txdata_index %d tx_data ptr %p fp pointer %p\n",
3757 txdata->cid, fp_index, txdata_index, txdata, fp); */
3758
3759 if (unlikely(bnx2x_tx_avail(bp, txdata) <
3760 skb_shinfo(skb)->nr_frags +
3761 BDS_PER_TX_PKT +
3762 NEXT_CNT_PER_TX_PKT(MAX_BDS_PER_TX_PKT))) {
3763 /* Handle special storage cases separately */
3764 if (txdata->tx_ring_size == 0) {
3765 struct bnx2x_eth_q_stats *q_stats =
3766 bnx2x_fp_qstats(bp, txdata->parent_fp);
3767 q_stats->driver_filtered_tx_pkt++;
3768 dev_kfree_skb(skb);
3769 return NETDEV_TX_OK;
3770 }
3771 bnx2x_fp_qstats(bp, txdata->parent_fp)->driver_xoff++;
3772 netif_tx_stop_queue(txq);
3773 BNX2X_ERR("BUG! Tx ring full when queue awake!\n");
3774
3775 return NETDEV_TX_BUSY;
3776 }
3777
3778 DP(NETIF_MSG_TX_QUEUED,
3779 "queue[%d]: SKB: summed %x protocol %x protocol(%x,%x) gso type %x xmit_type %x len %d\n",
3780 txq_index, skb->ip_summed, skb->protocol, ipv6_hdr(skb)->nexthdr,
3781 ip_hdr(skb)->protocol, skb_shinfo(skb)->gso_type, xmit_type,
3782 skb->len);
3783
3784 eth = (struct ethhdr *)skb->data;
3785
3786 /* set flag according to packet type (UNICAST_ADDRESS is default)*/
3787 if (unlikely(is_multicast_ether_addr(eth->h_dest))) {
3788 if (is_broadcast_ether_addr(eth->h_dest))
3789 mac_type = BROADCAST_ADDRESS;
3790 else
3791 mac_type = MULTICAST_ADDRESS;
3792 }
3793
3794 #if (MAX_SKB_FRAGS >= MAX_FETCH_BD - BDS_PER_TX_PKT)
3795 /* First, check if we need to linearize the skb (due to FW
3796 restrictions). No need to check fragmentation if page size > 8K
3797 (there will be no violation to FW restrictions) */
3798 if (bnx2x_pkt_req_lin(bp, skb, xmit_type)) {
3799 /* Statistics of linearization */
3800 bp->lin_cnt++;
3801 if (skb_linearize(skb) != 0) {
3802 DP(NETIF_MSG_TX_QUEUED,
3803 "SKB linearization failed - silently dropping this SKB\n");
3804 dev_kfree_skb_any(skb);
3805 return NETDEV_TX_OK;
3806 }
3807 }
3808 #endif
3809 /* Map skb linear data for DMA */
3810 mapping = dma_map_single(&bp->pdev->dev, skb->data,
3811 skb_headlen(skb), DMA_TO_DEVICE);
3812 if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
3813 DP(NETIF_MSG_TX_QUEUED,
3814 "SKB mapping failed - silently dropping this SKB\n");
3815 dev_kfree_skb_any(skb);
3816 return NETDEV_TX_OK;
3817 }
3818 /*
3819 Please read carefully. First we use one BD which we mark as start,
3820 then we have a parsing info BD (used for TSO or xsum),
3821 and only then we have the rest of the TSO BDs.
3822 (don't forget to mark the last one as last,
3823 and to unmap only AFTER you write to the BD ...)
3824 And above all, all pdb sizes are in words - NOT DWORDS!
3825 */
3826
3827 /* get current pkt produced now - advance it just before sending packet
3828 * since mapping of pages may fail and cause packet to be dropped
3829 */
3830 pkt_prod = txdata->tx_pkt_prod;
3831 bd_prod = TX_BD(txdata->tx_bd_prod);
3832
3833 /* get a tx_buf and first BD
3834 * tx_start_bd may be changed during SPLIT,
3835 * but first_bd will always stay first
3836 */
3837 tx_buf = &txdata->tx_buf_ring[TX_BD(pkt_prod)];
3838 tx_start_bd = &txdata->tx_desc_ring[bd_prod].start_bd;
3839 first_bd = tx_start_bd;
3840
3841 tx_start_bd->bd_flags.as_bitfield = ETH_TX_BD_FLAGS_START_BD;
3842
3843 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
3844 if (!(bp->flags & TX_TIMESTAMPING_EN)) {
3845 BNX2X_ERR("Tx timestamping was not enabled, this packet will not be timestamped\n");
3846 } else if (bp->ptp_tx_skb) {
3847 BNX2X_ERR("The device supports only a single outstanding packet to timestamp, this packet will not be timestamped\n");
3848 } else {
3849 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
3850 /* schedule check for Tx timestamp */
3851 bp->ptp_tx_skb = skb_get(skb);
3852 bp->ptp_tx_start = jiffies;
3853 schedule_work(&bp->ptp_task);
3854 }
3855 }
3856
3857 /* header nbd: indirectly zero other flags! */
3858 tx_start_bd->general_data = 1 << ETH_TX_START_BD_HDR_NBDS_SHIFT;
3859
3860 /* remember the first BD of the packet */
3861 tx_buf->first_bd = txdata->tx_bd_prod;
3862 tx_buf->skb = skb;
3863 tx_buf->flags = 0;
3864
3865 DP(NETIF_MSG_TX_QUEUED,
3866 "sending pkt %u @%p next_idx %u bd %u @%p\n",
3867 pkt_prod, tx_buf, txdata->tx_pkt_prod, bd_prod, tx_start_bd);
3868
3869 if (skb_vlan_tag_present(skb)) {
3870 tx_start_bd->vlan_or_ethertype =
3871 cpu_to_le16(skb_vlan_tag_get(skb));
3872 tx_start_bd->bd_flags.as_bitfield |=
3873 (X_ETH_OUTBAND_VLAN << ETH_TX_BD_FLAGS_VLAN_MODE_SHIFT);
3874 } else {
3875 /* when transmitting in a vf, start bd must hold the ethertype
3876 * for fw to enforce it
3877 */
3878 #ifndef BNX2X_STOP_ON_ERROR
3879 if (IS_VF(bp))
3880 #endif
3881 tx_start_bd->vlan_or_ethertype =
3882 cpu_to_le16(ntohs(eth->h_proto));
3883 #ifndef BNX2X_STOP_ON_ERROR
3884 else
3885 /* used by FW for packet accounting */
3886 tx_start_bd->vlan_or_ethertype = cpu_to_le16(pkt_prod);
3887 #endif
3888 }
3889
3890 nbd = 2; /* start_bd + pbd + frags (updated when pages are mapped) */
3891
3892 /* turn on parsing and get a BD */
3893 bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
3894
3895 if (xmit_type & XMIT_CSUM)
3896 bnx2x_set_sbd_csum(bp, skb, tx_start_bd, xmit_type);
3897
3898 if (!CHIP_IS_E1x(bp)) {
3899 pbd_e2 = &txdata->tx_desc_ring[bd_prod].parse_bd_e2;
3900 memset(pbd_e2, 0, sizeof(struct eth_tx_parse_bd_e2));
3901
3902 if (xmit_type & XMIT_CSUM_ENC) {
3903 u16 global_data = 0;
3904
3905 /* Set PBD in enc checksum offload case */
3906 hlen = bnx2x_set_pbd_csum_enc(bp, skb,
3907 &pbd_e2_parsing_data,
3908 xmit_type);
3909
3910 /* turn on 2nd parsing and get a BD */
3911 bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
3912
3913 pbd2 = &txdata->tx_desc_ring[bd_prod].parse_2nd_bd;
3914
3915 memset(pbd2, 0, sizeof(*pbd2));
3916
3917 pbd_e2->data.tunnel_data.ip_hdr_start_inner_w =
3918 (skb_inner_network_header(skb) -
3919 skb->data) >> 1;
3920
3921 if (xmit_type & XMIT_GSO_ENC)
3922 bnx2x_update_pbds_gso_enc(skb, pbd_e2, pbd2,
3923 &global_data,
3924 xmit_type);
3925
3926 pbd2->global_data = cpu_to_le16(global_data);
3927
3928 /* add addition parse BD indication to start BD */
3929 SET_FLAG(tx_start_bd->general_data,
3930 ETH_TX_START_BD_PARSE_NBDS, 1);
3931 /* set encapsulation flag in start BD */
3932 SET_FLAG(tx_start_bd->general_data,
3933 ETH_TX_START_BD_TUNNEL_EXIST, 1);
3934
3935 tx_buf->flags |= BNX2X_HAS_SECOND_PBD;
3936
3937 nbd++;
3938 } else if (xmit_type & XMIT_CSUM) {
3939 /* Set PBD in checksum offload case w/o encapsulation */
3940 hlen = bnx2x_set_pbd_csum_e2(bp, skb,
3941 &pbd_e2_parsing_data,
3942 xmit_type);
3943 }
3944
3945 bnx2x_set_ipv6_ext_e2(skb, &pbd_e2_parsing_data, xmit_type);
3946 /* Add the macs to the parsing BD if this is a vf or if
3947 * Tx Switching is enabled.
3948 */
3949 if (IS_VF(bp)) {
3950 /* override GRE parameters in BD */
3951 bnx2x_set_fw_mac_addr(&pbd_e2->data.mac_addr.src_hi,
3952 &pbd_e2->data.mac_addr.src_mid,
3953 &pbd_e2->data.mac_addr.src_lo,
3954 eth->h_source);
3955
3956 bnx2x_set_fw_mac_addr(&pbd_e2->data.mac_addr.dst_hi,
3957 &pbd_e2->data.mac_addr.dst_mid,
3958 &pbd_e2->data.mac_addr.dst_lo,
3959 eth->h_dest);
3960 } else {
3961 if (bp->flags & TX_SWITCHING)
3962 bnx2x_set_fw_mac_addr(
3963 &pbd_e2->data.mac_addr.dst_hi,
3964 &pbd_e2->data.mac_addr.dst_mid,
3965 &pbd_e2->data.mac_addr.dst_lo,
3966 eth->h_dest);
3967 #ifdef BNX2X_STOP_ON_ERROR
3968 /* Enforce security is always set in Stop on Error -
3969 * source mac should be present in the parsing BD
3970 */
3971 bnx2x_set_fw_mac_addr(&pbd_e2->data.mac_addr.src_hi,
3972 &pbd_e2->data.mac_addr.src_mid,
3973 &pbd_e2->data.mac_addr.src_lo,
3974 eth->h_source);
3975 #endif
3976 }
3977
3978 SET_FLAG(pbd_e2_parsing_data,
3979 ETH_TX_PARSE_BD_E2_ETH_ADDR_TYPE, mac_type);
3980 } else {
3981 u16 global_data = 0;
3982 pbd_e1x = &txdata->tx_desc_ring[bd_prod].parse_bd_e1x;
3983 memset(pbd_e1x, 0, sizeof(struct eth_tx_parse_bd_e1x));
3984 /* Set PBD in checksum offload case */
3985 if (xmit_type & XMIT_CSUM)
3986 hlen = bnx2x_set_pbd_csum(bp, skb, pbd_e1x, xmit_type);
3987
3988 SET_FLAG(global_data,
3989 ETH_TX_PARSE_BD_E1X_ETH_ADDR_TYPE, mac_type);
3990 pbd_e1x->global_data |= cpu_to_le16(global_data);
3991 }
3992
3993 /* Setup the data pointer of the first BD of the packet */
3994 tx_start_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
3995 tx_start_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
3996 tx_start_bd->nbytes = cpu_to_le16(skb_headlen(skb));
3997 pkt_size = tx_start_bd->nbytes;
3998
3999 DP(NETIF_MSG_TX_QUEUED,
4000 "first bd @%p addr (%x:%x) nbytes %d flags %x vlan %x\n",
4001 tx_start_bd, tx_start_bd->addr_hi, tx_start_bd->addr_lo,
4002 le16_to_cpu(tx_start_bd->nbytes),
4003 tx_start_bd->bd_flags.as_bitfield,
4004 le16_to_cpu(tx_start_bd->vlan_or_ethertype));
4005
4006 if (xmit_type & XMIT_GSO) {
4007
4008 DP(NETIF_MSG_TX_QUEUED,
4009 "TSO packet len %d hlen %d total len %d tso size %d\n",
4010 skb->len, hlen, skb_headlen(skb),
4011 skb_shinfo(skb)->gso_size);
4012
4013 tx_start_bd->bd_flags.as_bitfield |= ETH_TX_BD_FLAGS_SW_LSO;
4014
4015 if (unlikely(skb_headlen(skb) > hlen)) {
4016 nbd++;
4017 bd_prod = bnx2x_tx_split(bp, txdata, tx_buf,
4018 &tx_start_bd, hlen,
4019 bd_prod);
4020 }
4021 if (!CHIP_IS_E1x(bp))
4022 pbd_e2_parsing_data |=
4023 (skb_shinfo(skb)->gso_size <<
4024 ETH_TX_PARSE_BD_E2_LSO_MSS_SHIFT) &
4025 ETH_TX_PARSE_BD_E2_LSO_MSS;
4026 else
4027 bnx2x_set_pbd_gso(skb, pbd_e1x, xmit_type);
4028 }
4029
4030 /* Set the PBD's parsing_data field if not zero
4031 * (for the chips newer than 57711).
4032 */
4033 if (pbd_e2_parsing_data)
4034 pbd_e2->parsing_data = cpu_to_le32(pbd_e2_parsing_data);
4035
4036 tx_data_bd = (struct eth_tx_bd *)tx_start_bd;
4037
4038 /* Handle fragmented skb */
4039 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
4040 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
4041
4042 mapping = skb_frag_dma_map(&bp->pdev->dev, frag, 0,
4043 skb_frag_size(frag), DMA_TO_DEVICE);
4044 if (unlikely(dma_mapping_error(&bp->pdev->dev, mapping))) {
4045 unsigned int pkts_compl = 0, bytes_compl = 0;
4046
4047 DP(NETIF_MSG_TX_QUEUED,
4048 "Unable to map page - dropping packet...\n");
4049
4050 /* we need unmap all buffers already mapped
4051 * for this SKB;
4052 * first_bd->nbd need to be properly updated
4053 * before call to bnx2x_free_tx_pkt
4054 */
4055 first_bd->nbd = cpu_to_le16(nbd);
4056 bnx2x_free_tx_pkt(bp, txdata,
4057 TX_BD(txdata->tx_pkt_prod),
4058 &pkts_compl, &bytes_compl);
4059 return NETDEV_TX_OK;
4060 }
4061
4062 bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
4063 tx_data_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
4064 if (total_pkt_bd == NULL)
4065 total_pkt_bd = &txdata->tx_desc_ring[bd_prod].reg_bd;
4066
4067 tx_data_bd->addr_hi = cpu_to_le32(U64_HI(mapping));
4068 tx_data_bd->addr_lo = cpu_to_le32(U64_LO(mapping));
4069 tx_data_bd->nbytes = cpu_to_le16(skb_frag_size(frag));
4070 le16_add_cpu(&pkt_size, skb_frag_size(frag));
4071 nbd++;
4072
4073 DP(NETIF_MSG_TX_QUEUED,
4074 "frag %d bd @%p addr (%x:%x) nbytes %d\n",
4075 i, tx_data_bd, tx_data_bd->addr_hi, tx_data_bd->addr_lo,
4076 le16_to_cpu(tx_data_bd->nbytes));
4077 }
4078
4079 DP(NETIF_MSG_TX_QUEUED, "last bd @%p\n", tx_data_bd);
4080
4081 /* update with actual num BDs */
4082 first_bd->nbd = cpu_to_le16(nbd);
4083
4084 bd_prod = TX_BD(NEXT_TX_IDX(bd_prod));
4085
4086 /* now send a tx doorbell, counting the next BD
4087 * if the packet contains or ends with it
4088 */
4089 if (TX_BD_POFF(bd_prod) < nbd)
4090 nbd++;
4091
4092 /* total_pkt_bytes should be set on the first data BD if
4093 * it's not an LSO packet and there is more than one
4094 * data BD. In this case pkt_size is limited by an MTU value.
4095 * However we prefer to set it for an LSO packet (while we don't
4096 * have to) in order to save some CPU cycles in a none-LSO
4097 * case, when we much more care about them.
4098 */
4099 if (total_pkt_bd != NULL)
4100 total_pkt_bd->total_pkt_bytes = pkt_size;
4101
4102 if (pbd_e1x)
4103 DP(NETIF_MSG_TX_QUEUED,
4104 "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",
4105 pbd_e1x, pbd_e1x->global_data, pbd_e1x->ip_hlen_w,
4106 pbd_e1x->ip_id, pbd_e1x->lso_mss, pbd_e1x->tcp_flags,
4107 pbd_e1x->tcp_pseudo_csum, pbd_e1x->tcp_send_seq,
4108 le16_to_cpu(pbd_e1x->total_hlen_w));
4109 if (pbd_e2)
4110 DP(NETIF_MSG_TX_QUEUED,
4111 "PBD (E2) @%p dst %x %x %x src %x %x %x parsing_data %x\n",
4112 pbd_e2,
4113 pbd_e2->data.mac_addr.dst_hi,
4114 pbd_e2->data.mac_addr.dst_mid,
4115 pbd_e2->data.mac_addr.dst_lo,
4116 pbd_e2->data.mac_addr.src_hi,
4117 pbd_e2->data.mac_addr.src_mid,
4118 pbd_e2->data.mac_addr.src_lo,
4119 pbd_e2->parsing_data);
4120 DP(NETIF_MSG_TX_QUEUED, "doorbell: nbd %d bd %u\n", nbd, bd_prod);
4121
4122 netdev_tx_sent_queue(txq, skb->len);
4123
4124 skb_tx_timestamp(skb);
4125
4126 txdata->tx_pkt_prod++;
4127 /*
4128 * Make sure that the BD data is updated before updating the producer
4129 * since FW might read the BD right after the producer is updated.
4130 * This is only applicable for weak-ordered memory model archs such
4131 * as IA-64. The following barrier is also mandatory since FW will
4132 * assumes packets must have BDs.
4133 */
4134 wmb();
4135
4136 txdata->tx_db.data.prod += nbd;
4137 barrier();
4138
4139 DOORBELL(bp, txdata->cid, txdata->tx_db.raw);
4140
4141 mmiowb();
4142
4143 txdata->tx_bd_prod += nbd;
4144
4145 if (unlikely(bnx2x_tx_avail(bp, txdata) < MAX_DESC_PER_TX_PKT)) {
4146 netif_tx_stop_queue(txq);
4147
4148 /* paired memory barrier is in bnx2x_tx_int(), we have to keep
4149 * ordering of set_bit() in netif_tx_stop_queue() and read of
4150 * fp->bd_tx_cons */
4151 smp_mb();
4152
4153 bnx2x_fp_qstats(bp, txdata->parent_fp)->driver_xoff++;
4154 if (bnx2x_tx_avail(bp, txdata) >= MAX_DESC_PER_TX_PKT)
4155 netif_tx_wake_queue(txq);
4156 }
4157 txdata->tx_pkt++;
4158
4159 return NETDEV_TX_OK;
4160 }
4161
4162 /**
4163 * bnx2x_setup_tc - routine to configure net_device for multi tc
4164 *
4165 * @netdev: net device to configure
4166 * @tc: number of traffic classes to enable
4167 *
4168 * callback connected to the ndo_setup_tc function pointer
4169 */
4170 int bnx2x_setup_tc(struct net_device *dev, u8 num_tc)
4171 {
4172 int cos, prio, count, offset;
4173 struct bnx2x *bp = netdev_priv(dev);
4174
4175 /* setup tc must be called under rtnl lock */
4176 ASSERT_RTNL();
4177
4178 /* no traffic classes requested. Aborting */
4179 if (!num_tc) {
4180 netdev_reset_tc(dev);
4181 return 0;
4182 }
4183
4184 /* requested to support too many traffic classes */
4185 if (num_tc > bp->max_cos) {
4186 BNX2X_ERR("support for too many traffic classes requested: %d. Max supported is %d\n",
4187 num_tc, bp->max_cos);
4188 return -EINVAL;
4189 }
4190
4191 /* declare amount of supported traffic classes */
4192 if (netdev_set_num_tc(dev, num_tc)) {
4193 BNX2X_ERR("failed to declare %d traffic classes\n", num_tc);
4194 return -EINVAL;
4195 }
4196
4197 /* configure priority to traffic class mapping */
4198 for (prio = 0; prio < BNX2X_MAX_PRIORITY; prio++) {
4199 netdev_set_prio_tc_map(dev, prio, bp->prio_to_cos[prio]);
4200 DP(BNX2X_MSG_SP | NETIF_MSG_IFUP,
4201 "mapping priority %d to tc %d\n",
4202 prio, bp->prio_to_cos[prio]);
4203 }
4204
4205 /* Use this configuration to differentiate tc0 from other COSes
4206 This can be used for ets or pfc, and save the effort of setting
4207 up a multio class queue disc or negotiating DCBX with a switch
4208 netdev_set_prio_tc_map(dev, 0, 0);
4209 DP(BNX2X_MSG_SP, "mapping priority %d to tc %d\n", 0, 0);
4210 for (prio = 1; prio < 16; prio++) {
4211 netdev_set_prio_tc_map(dev, prio, 1);
4212 DP(BNX2X_MSG_SP, "mapping priority %d to tc %d\n", prio, 1);
4213 } */
4214
4215 /* configure traffic class to transmission queue mapping */
4216 for (cos = 0; cos < bp->max_cos; cos++) {
4217 count = BNX2X_NUM_ETH_QUEUES(bp);
4218 offset = cos * BNX2X_NUM_NON_CNIC_QUEUES(bp);
4219 netdev_set_tc_queue(dev, cos, count, offset);
4220 DP(BNX2X_MSG_SP | NETIF_MSG_IFUP,
4221 "mapping tc %d to offset %d count %d\n",
4222 cos, offset, count);
4223 }
4224
4225 return 0;
4226 }
4227
4228 /* called with rtnl_lock */
4229 int bnx2x_change_mac_addr(struct net_device *dev, void *p)
4230 {
4231 struct sockaddr *addr = p;
4232 struct bnx2x *bp = netdev_priv(dev);
4233 int rc = 0;
4234
4235 if (!is_valid_ether_addr(addr->sa_data)) {
4236 BNX2X_ERR("Requested MAC address is not valid\n");
4237 return -EINVAL;
4238 }
4239
4240 if (IS_MF_STORAGE_ONLY(bp)) {
4241 BNX2X_ERR("Can't change address on STORAGE ONLY function\n");
4242 return -EINVAL;
4243 }
4244
4245 if (netif_running(dev)) {
4246 rc = bnx2x_set_eth_mac(bp, false);
4247 if (rc)
4248 return rc;
4249 }
4250
4251 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
4252
4253 if (netif_running(dev))
4254 rc = bnx2x_set_eth_mac(bp, true);
4255
4256 return rc;
4257 }
4258
4259 static void bnx2x_free_fp_mem_at(struct bnx2x *bp, int fp_index)
4260 {
4261 union host_hc_status_block *sb = &bnx2x_fp(bp, fp_index, status_blk);
4262 struct bnx2x_fastpath *fp = &bp->fp[fp_index];
4263 u8 cos;
4264
4265 /* Common */
4266
4267 if (IS_FCOE_IDX(fp_index)) {
4268 memset(sb, 0, sizeof(union host_hc_status_block));
4269 fp->status_blk_mapping = 0;
4270 } else {
4271 /* status blocks */
4272 if (!CHIP_IS_E1x(bp))
4273 BNX2X_PCI_FREE(sb->e2_sb,
4274 bnx2x_fp(bp, fp_index,
4275 status_blk_mapping),
4276 sizeof(struct host_hc_status_block_e2));
4277 else
4278 BNX2X_PCI_FREE(sb->e1x_sb,
4279 bnx2x_fp(bp, fp_index,
4280 status_blk_mapping),
4281 sizeof(struct host_hc_status_block_e1x));
4282 }
4283
4284 /* Rx */
4285 if (!skip_rx_queue(bp, fp_index)) {
4286 bnx2x_free_rx_bds(fp);
4287
4288 /* fastpath rx rings: rx_buf rx_desc rx_comp */
4289 BNX2X_FREE(bnx2x_fp(bp, fp_index, rx_buf_ring));
4290 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_desc_ring),
4291 bnx2x_fp(bp, fp_index, rx_desc_mapping),
4292 sizeof(struct eth_rx_bd) * NUM_RX_BD);
4293
4294 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_comp_ring),
4295 bnx2x_fp(bp, fp_index, rx_comp_mapping),
4296 sizeof(struct eth_fast_path_rx_cqe) *
4297 NUM_RCQ_BD);
4298
4299 /* SGE ring */
4300 BNX2X_FREE(bnx2x_fp(bp, fp_index, rx_page_ring));
4301 BNX2X_PCI_FREE(bnx2x_fp(bp, fp_index, rx_sge_ring),
4302 bnx2x_fp(bp, fp_index, rx_sge_mapping),
4303 BCM_PAGE_SIZE * NUM_RX_SGE_PAGES);
4304 }
4305
4306 /* Tx */
4307 if (!skip_tx_queue(bp, fp_index)) {
4308 /* fastpath tx rings: tx_buf tx_desc */
4309 for_each_cos_in_tx_queue(fp, cos) {
4310 struct bnx2x_fp_txdata *txdata = fp->txdata_ptr[cos];
4311
4312 DP(NETIF_MSG_IFDOWN,
4313 "freeing tx memory of fp %d cos %d cid %d\n",
4314 fp_index, cos, txdata->cid);
4315
4316 BNX2X_FREE(txdata->tx_buf_ring);
4317 BNX2X_PCI_FREE(txdata->tx_desc_ring,
4318 txdata->tx_desc_mapping,
4319 sizeof(union eth_tx_bd_types) * NUM_TX_BD);
4320 }
4321 }
4322 /* end of fastpath */
4323 }
4324
4325 static void bnx2x_free_fp_mem_cnic(struct bnx2x *bp)
4326 {
4327 int i;
4328 for_each_cnic_queue(bp, i)
4329 bnx2x_free_fp_mem_at(bp, i);
4330 }
4331
4332 void bnx2x_free_fp_mem(struct bnx2x *bp)
4333 {
4334 int i;
4335 for_each_eth_queue(bp, i)
4336 bnx2x_free_fp_mem_at(bp, i);
4337 }
4338
4339 static void set_sb_shortcuts(struct bnx2x *bp, int index)
4340 {
4341 union host_hc_status_block status_blk = bnx2x_fp(bp, index, status_blk);
4342 if (!CHIP_IS_E1x(bp)) {
4343 bnx2x_fp(bp, index, sb_index_values) =
4344 (__le16 *)status_blk.e2_sb->sb.index_values;
4345 bnx2x_fp(bp, index, sb_running_index) =
4346 (__le16 *)status_blk.e2_sb->sb.running_index;
4347 } else {
4348 bnx2x_fp(bp, index, sb_index_values) =
4349 (__le16 *)status_blk.e1x_sb->sb.index_values;
4350 bnx2x_fp(bp, index, sb_running_index) =
4351 (__le16 *)status_blk.e1x_sb->sb.running_index;
4352 }
4353 }
4354
4355 /* Returns the number of actually allocated BDs */
4356 static int bnx2x_alloc_rx_bds(struct bnx2x_fastpath *fp,
4357 int rx_ring_size)
4358 {
4359 struct bnx2x *bp = fp->bp;
4360 u16 ring_prod, cqe_ring_prod;
4361 int i, failure_cnt = 0;
4362
4363 fp->rx_comp_cons = 0;
4364 cqe_ring_prod = ring_prod = 0;
4365
4366 /* This routine is called only during fo init so
4367 * fp->eth_q_stats.rx_skb_alloc_failed = 0
4368 */
4369 for (i = 0; i < rx_ring_size; i++) {
4370 if (bnx2x_alloc_rx_data(bp, fp, ring_prod, GFP_KERNEL) < 0) {
4371 failure_cnt++;
4372 continue;
4373 }
4374 ring_prod = NEXT_RX_IDX(ring_prod);
4375 cqe_ring_prod = NEXT_RCQ_IDX(cqe_ring_prod);
4376 WARN_ON(ring_prod <= (i - failure_cnt));
4377 }
4378
4379 if (failure_cnt)
4380 BNX2X_ERR("was only able to allocate %d rx skbs on queue[%d]\n",
4381 i - failure_cnt, fp->index);
4382
4383 fp->rx_bd_prod = ring_prod;
4384 /* Limit the CQE producer by the CQE ring size */
4385 fp->rx_comp_prod = min_t(u16, NUM_RCQ_RINGS*RCQ_DESC_CNT,
4386 cqe_ring_prod);
4387 fp->rx_pkt = fp->rx_calls = 0;
4388
4389 bnx2x_fp_stats(bp, fp)->eth_q_stats.rx_skb_alloc_failed += failure_cnt;
4390
4391 return i - failure_cnt;
4392 }
4393
4394 static void bnx2x_set_next_page_rx_cq(struct bnx2x_fastpath *fp)
4395 {
4396 int i;
4397
4398 for (i = 1; i <= NUM_RCQ_RINGS; i++) {
4399 struct eth_rx_cqe_next_page *nextpg;
4400
4401 nextpg = (struct eth_rx_cqe_next_page *)
4402 &fp->rx_comp_ring[RCQ_DESC_CNT * i - 1];
4403 nextpg->addr_hi =
4404 cpu_to_le32(U64_HI(fp->rx_comp_mapping +
4405 BCM_PAGE_SIZE*(i % NUM_RCQ_RINGS)));
4406 nextpg->addr_lo =
4407 cpu_to_le32(U64_LO(fp->rx_comp_mapping +
4408 BCM_PAGE_SIZE*(i % NUM_RCQ_RINGS)));
4409 }
4410 }
4411
4412 static int bnx2x_alloc_fp_mem_at(struct bnx2x *bp, int index)
4413 {
4414 union host_hc_status_block *sb;
4415 struct bnx2x_fastpath *fp = &bp->fp[index];
4416 int ring_size = 0;
4417 u8 cos;
4418 int rx_ring_size = 0;
4419
4420 if (!bp->rx_ring_size && IS_MF_STORAGE_ONLY(bp)) {
4421 rx_ring_size = MIN_RX_SIZE_NONTPA;
4422 bp->rx_ring_size = rx_ring_size;
4423 } else if (!bp->rx_ring_size) {
4424 rx_ring_size = MAX_RX_AVAIL/BNX2X_NUM_RX_QUEUES(bp);
4425
4426 if (CHIP_IS_E3(bp)) {
4427 u32 cfg = SHMEM_RD(bp,
4428 dev_info.port_hw_config[BP_PORT(bp)].
4429 default_cfg);
4430
4431 /* Decrease ring size for 1G functions */
4432 if ((cfg & PORT_HW_CFG_NET_SERDES_IF_MASK) ==
4433 PORT_HW_CFG_NET_SERDES_IF_SGMII)
4434 rx_ring_size /= 10;
4435 }
4436
4437 /* allocate at least number of buffers required by FW */
4438 rx_ring_size = max_t(int, bp->disable_tpa ? MIN_RX_SIZE_NONTPA :
4439 MIN_RX_SIZE_TPA, rx_ring_size);
4440
4441 bp->rx_ring_size = rx_ring_size;
4442 } else /* if rx_ring_size specified - use it */
4443 rx_ring_size = bp->rx_ring_size;
4444
4445 DP(BNX2X_MSG_SP, "calculated rx_ring_size %d\n", rx_ring_size);
4446
4447 /* Common */
4448 sb = &bnx2x_fp(bp, index, status_blk);
4449
4450 if (!IS_FCOE_IDX(index)) {
4451 /* status blocks */
4452 if (!CHIP_IS_E1x(bp)) {
4453 sb->e2_sb = BNX2X_PCI_ALLOC(&bnx2x_fp(bp, index, status_blk_mapping),
4454 sizeof(struct host_hc_status_block_e2));
4455 if (!sb->e2_sb)
4456 goto alloc_mem_err;
4457 } else {
4458 sb->e1x_sb = BNX2X_PCI_ALLOC(&bnx2x_fp(bp, index, status_blk_mapping),
4459 sizeof(struct host_hc_status_block_e1x));
4460 if (!sb->e1x_sb)
4461 goto alloc_mem_err;
4462 }
4463 }
4464
4465 /* FCoE Queue uses Default SB and doesn't ACK the SB, thus no need to
4466 * set shortcuts for it.
4467 */
4468 if (!IS_FCOE_IDX(index))
4469 set_sb_shortcuts(bp, index);
4470
4471 /* Tx */
4472 if (!skip_tx_queue(bp, index)) {
4473 /* fastpath tx rings: tx_buf tx_desc */
4474 for_each_cos_in_tx_queue(fp, cos) {
4475 struct bnx2x_fp_txdata *txdata = fp->txdata_ptr[cos];
4476
4477 DP(NETIF_MSG_IFUP,
4478 "allocating tx memory of fp %d cos %d\n",
4479 index, cos);
4480
4481 txdata->tx_buf_ring = kcalloc(NUM_TX_BD,
4482 sizeof(struct sw_tx_bd),
4483 GFP_KERNEL);
4484 if (!txdata->tx_buf_ring)
4485 goto alloc_mem_err;
4486 txdata->tx_desc_ring = BNX2X_PCI_ALLOC(&txdata->tx_desc_mapping,
4487 sizeof(union eth_tx_bd_types) * NUM_TX_BD);
4488 if (!txdata->tx_desc_ring)
4489 goto alloc_mem_err;
4490 }
4491 }
4492
4493 /* Rx */
4494 if (!skip_rx_queue(bp, index)) {
4495 /* fastpath rx rings: rx_buf rx_desc rx_comp */
4496 bnx2x_fp(bp, index, rx_buf_ring) =
4497 kcalloc(NUM_RX_BD, sizeof(struct sw_rx_bd), GFP_KERNEL);
4498 if (!bnx2x_fp(bp, index, rx_buf_ring))
4499 goto alloc_mem_err;
4500 bnx2x_fp(bp, index, rx_desc_ring) =
4501 BNX2X_PCI_ALLOC(&bnx2x_fp(bp, index, rx_desc_mapping),
4502 sizeof(struct eth_rx_bd) * NUM_RX_BD);
4503 if (!bnx2x_fp(bp, index, rx_desc_ring))
4504 goto alloc_mem_err;
4505
4506 /* Seed all CQEs by 1s */
4507 bnx2x_fp(bp, index, rx_comp_ring) =
4508 BNX2X_PCI_FALLOC(&bnx2x_fp(bp, index, rx_comp_mapping),
4509 sizeof(struct eth_fast_path_rx_cqe) * NUM_RCQ_BD);
4510 if (!bnx2x_fp(bp, index, rx_comp_ring))
4511 goto alloc_mem_err;
4512
4513 /* SGE ring */
4514 bnx2x_fp(bp, index, rx_page_ring) =
4515 kcalloc(NUM_RX_SGE, sizeof(struct sw_rx_page),
4516 GFP_KERNEL);
4517 if (!bnx2x_fp(bp, index, rx_page_ring))
4518 goto alloc_mem_err;
4519 bnx2x_fp(bp, index, rx_sge_ring) =
4520 BNX2X_PCI_ALLOC(&bnx2x_fp(bp, index, rx_sge_mapping),
4521 BCM_PAGE_SIZE * NUM_RX_SGE_PAGES);
4522 if (!bnx2x_fp(bp, index, rx_sge_ring))
4523 goto alloc_mem_err;
4524 /* RX BD ring */
4525 bnx2x_set_next_page_rx_bd(fp);
4526
4527 /* CQ ring */
4528 bnx2x_set_next_page_rx_cq(fp);
4529
4530 /* BDs */
4531 ring_size = bnx2x_alloc_rx_bds(fp, rx_ring_size);
4532 if (ring_size < rx_ring_size)
4533 goto alloc_mem_err;
4534 }
4535
4536 return 0;
4537
4538 /* handles low memory cases */
4539 alloc_mem_err:
4540 BNX2X_ERR("Unable to allocate full memory for queue %d (size %d)\n",
4541 index, ring_size);
4542 /* FW will drop all packets if queue is not big enough,
4543 * In these cases we disable the queue
4544 * Min size is different for OOO, TPA and non-TPA queues
4545 */
4546 if (ring_size < (fp->disable_tpa ?
4547 MIN_RX_SIZE_NONTPA : MIN_RX_SIZE_TPA)) {
4548 /* release memory allocated for this queue */
4549 bnx2x_free_fp_mem_at(bp, index);
4550 return -ENOMEM;
4551 }
4552 return 0;
4553 }
4554
4555 static int bnx2x_alloc_fp_mem_cnic(struct bnx2x *bp)
4556 {
4557 if (!NO_FCOE(bp))
4558 /* FCoE */
4559 if (bnx2x_alloc_fp_mem_at(bp, FCOE_IDX(bp)))
4560 /* we will fail load process instead of mark
4561 * NO_FCOE_FLAG
4562 */
4563 return -ENOMEM;
4564
4565 return 0;
4566 }
4567
4568 static int bnx2x_alloc_fp_mem(struct bnx2x *bp)
4569 {
4570 int i;
4571
4572 /* 1. Allocate FP for leading - fatal if error
4573 * 2. Allocate RSS - fix number of queues if error
4574 */
4575
4576 /* leading */
4577 if (bnx2x_alloc_fp_mem_at(bp, 0))
4578 return -ENOMEM;
4579
4580 /* RSS */
4581 for_each_nondefault_eth_queue(bp, i)
4582 if (bnx2x_alloc_fp_mem_at(bp, i))
4583 break;
4584
4585 /* handle memory failures */
4586 if (i != BNX2X_NUM_ETH_QUEUES(bp)) {
4587 int delta = BNX2X_NUM_ETH_QUEUES(bp) - i;
4588
4589 WARN_ON(delta < 0);
4590 bnx2x_shrink_eth_fp(bp, delta);
4591 if (CNIC_SUPPORT(bp))
4592 /* move non eth FPs next to last eth FP
4593 * must be done in that order
4594 * FCOE_IDX < FWD_IDX < OOO_IDX
4595 */
4596
4597 /* move FCoE fp even NO_FCOE_FLAG is on */
4598 bnx2x_move_fp(bp, FCOE_IDX(bp), FCOE_IDX(bp) - delta);
4599 bp->num_ethernet_queues -= delta;
4600 bp->num_queues = bp->num_ethernet_queues +
4601 bp->num_cnic_queues;
4602 BNX2X_ERR("Adjusted num of queues from %d to %d\n",
4603 bp->num_queues + delta, bp->num_queues);
4604 }
4605
4606 return 0;
4607 }
4608
4609 void bnx2x_free_mem_bp(struct bnx2x *bp)
4610 {
4611 int i;
4612
4613 for (i = 0; i < bp->fp_array_size; i++)
4614 kfree(bp->fp[i].tpa_info);
4615 kfree(bp->fp);
4616 kfree(bp->sp_objs);
4617 kfree(bp->fp_stats);
4618 kfree(bp->bnx2x_txq);
4619 kfree(bp->msix_table);
4620 kfree(bp->ilt);
4621 }
4622
4623 int bnx2x_alloc_mem_bp(struct bnx2x *bp)
4624 {
4625 struct bnx2x_fastpath *fp;
4626 struct msix_entry *tbl;
4627 struct bnx2x_ilt *ilt;
4628 int msix_table_size = 0;
4629 int fp_array_size, txq_array_size;
4630 int i;
4631
4632 /*
4633 * The biggest MSI-X table we might need is as a maximum number of fast
4634 * path IGU SBs plus default SB (for PF only).
4635 */
4636 msix_table_size = bp->igu_sb_cnt;
4637 if (IS_PF(bp))
4638 msix_table_size++;
4639 BNX2X_DEV_INFO("msix_table_size %d\n", msix_table_size);
4640
4641 /* fp array: RSS plus CNIC related L2 queues */
4642 fp_array_size = BNX2X_MAX_RSS_COUNT(bp) + CNIC_SUPPORT(bp);
4643 bp->fp_array_size = fp_array_size;
4644 BNX2X_DEV_INFO("fp_array_size %d\n", bp->fp_array_size);
4645
4646 fp = kcalloc(bp->fp_array_size, sizeof(*fp), GFP_KERNEL);
4647 if (!fp)
4648 goto alloc_err;
4649 for (i = 0; i < bp->fp_array_size; i++) {
4650 fp[i].tpa_info =
4651 kcalloc(ETH_MAX_AGGREGATION_QUEUES_E1H_E2,
4652 sizeof(struct bnx2x_agg_info), GFP_KERNEL);
4653 if (!(fp[i].tpa_info))
4654 goto alloc_err;
4655 }
4656
4657 bp->fp = fp;
4658
4659 /* allocate sp objs */
4660 bp->sp_objs = kcalloc(bp->fp_array_size, sizeof(struct bnx2x_sp_objs),
4661 GFP_KERNEL);
4662 if (!bp->sp_objs)
4663 goto alloc_err;
4664
4665 /* allocate fp_stats */
4666 bp->fp_stats = kcalloc(bp->fp_array_size, sizeof(struct bnx2x_fp_stats),
4667 GFP_KERNEL);
4668 if (!bp->fp_stats)
4669 goto alloc_err;
4670
4671 /* Allocate memory for the transmission queues array */
4672 txq_array_size =
4673 BNX2X_MAX_RSS_COUNT(bp) * BNX2X_MULTI_TX_COS + CNIC_SUPPORT(bp);
4674 BNX2X_DEV_INFO("txq_array_size %d", txq_array_size);
4675
4676 bp->bnx2x_txq = kcalloc(txq_array_size, sizeof(struct bnx2x_fp_txdata),
4677 GFP_KERNEL);
4678 if (!bp->bnx2x_txq)
4679 goto alloc_err;
4680
4681 /* msix table */
4682 tbl = kcalloc(msix_table_size, sizeof(*tbl), GFP_KERNEL);
4683 if (!tbl)
4684 goto alloc_err;
4685 bp->msix_table = tbl;
4686
4687 /* ilt */
4688 ilt = kzalloc(sizeof(*ilt), GFP_KERNEL);
4689 if (!ilt)
4690 goto alloc_err;
4691 bp->ilt = ilt;
4692
4693 return 0;
4694 alloc_err:
4695 bnx2x_free_mem_bp(bp);
4696 return -ENOMEM;
4697 }
4698
4699 int bnx2x_reload_if_running(struct net_device *dev)
4700 {
4701 struct bnx2x *bp = netdev_priv(dev);
4702
4703 if (unlikely(!netif_running(dev)))
4704 return 0;
4705
4706 bnx2x_nic_unload(bp, UNLOAD_NORMAL, true);
4707 return bnx2x_nic_load(bp, LOAD_NORMAL);
4708 }
4709
4710 int bnx2x_get_cur_phy_idx(struct bnx2x *bp)
4711 {
4712 u32 sel_phy_idx = 0;
4713 if (bp->link_params.num_phys <= 1)
4714 return INT_PHY;
4715
4716 if (bp->link_vars.link_up) {
4717 sel_phy_idx = EXT_PHY1;
4718 /* In case link is SERDES, check if the EXT_PHY2 is the one */
4719 if ((bp->link_vars.link_status & LINK_STATUS_SERDES_LINK) &&
4720 (bp->link_params.phy[EXT_PHY2].supported & SUPPORTED_FIBRE))
4721 sel_phy_idx = EXT_PHY2;
4722 } else {
4723
4724 switch (bnx2x_phy_selection(&bp->link_params)) {
4725 case PORT_HW_CFG_PHY_SELECTION_HARDWARE_DEFAULT:
4726 case PORT_HW_CFG_PHY_SELECTION_FIRST_PHY:
4727 case PORT_HW_CFG_PHY_SELECTION_FIRST_PHY_PRIORITY:
4728 sel_phy_idx = EXT_PHY1;
4729 break;
4730 case PORT_HW_CFG_PHY_SELECTION_SECOND_PHY:
4731 case PORT_HW_CFG_PHY_SELECTION_SECOND_PHY_PRIORITY:
4732 sel_phy_idx = EXT_PHY2;
4733 break;
4734 }
4735 }
4736
4737 return sel_phy_idx;
4738 }
4739 int bnx2x_get_link_cfg_idx(struct bnx2x *bp)
4740 {
4741 u32 sel_phy_idx = bnx2x_get_cur_phy_idx(bp);
4742 /*
4743 * The selected activated PHY is always after swapping (in case PHY
4744 * swapping is enabled). So when swapping is enabled, we need to reverse
4745 * the configuration
4746 */
4747
4748 if (bp->link_params.multi_phy_config &
4749 PORT_HW_CFG_PHY_SWAPPED_ENABLED) {
4750 if (sel_phy_idx == EXT_PHY1)
4751 sel_phy_idx = EXT_PHY2;
4752 else if (sel_phy_idx == EXT_PHY2)
4753 sel_phy_idx = EXT_PHY1;
4754 }
4755 return LINK_CONFIG_IDX(sel_phy_idx);
4756 }
4757
4758 #ifdef NETDEV_FCOE_WWNN
4759 int bnx2x_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type)
4760 {
4761 struct bnx2x *bp = netdev_priv(dev);
4762 struct cnic_eth_dev *cp = &bp->cnic_eth_dev;
4763
4764 switch (type) {
4765 case NETDEV_FCOE_WWNN:
4766 *wwn = HILO_U64(cp->fcoe_wwn_node_name_hi,
4767 cp->fcoe_wwn_node_name_lo);
4768 break;
4769 case NETDEV_FCOE_WWPN:
4770 *wwn = HILO_U64(cp->fcoe_wwn_port_name_hi,
4771 cp->fcoe_wwn_port_name_lo);
4772 break;
4773 default:
4774 BNX2X_ERR("Wrong WWN type requested - %d\n", type);
4775 return -EINVAL;
4776 }
4777
4778 return 0;
4779 }
4780 #endif
4781
4782 /* called with rtnl_lock */
4783 int bnx2x_change_mtu(struct net_device *dev, int new_mtu)
4784 {
4785 struct bnx2x *bp = netdev_priv(dev);
4786
4787 if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
4788 BNX2X_ERR("Can't perform change MTU during parity recovery\n");
4789 return -EAGAIN;
4790 }
4791
4792 if ((new_mtu > ETH_MAX_JUMBO_PACKET_SIZE) ||
4793 ((new_mtu + ETH_HLEN) < ETH_MIN_PACKET_SIZE)) {
4794 BNX2X_ERR("Can't support requested MTU size\n");
4795 return -EINVAL;
4796 }
4797
4798 /* This does not race with packet allocation
4799 * because the actual alloc size is
4800 * only updated as part of load
4801 */
4802 dev->mtu = new_mtu;
4803
4804 return bnx2x_reload_if_running(dev);
4805 }
4806
4807 netdev_features_t bnx2x_fix_features(struct net_device *dev,
4808 netdev_features_t features)
4809 {
4810 struct bnx2x *bp = netdev_priv(dev);
4811
4812 if (pci_num_vf(bp->pdev)) {
4813 netdev_features_t changed = dev->features ^ features;
4814
4815 /* Revert the requested changes in features if they
4816 * would require internal reload of PF in bnx2x_set_features().
4817 */
4818 if (!(features & NETIF_F_RXCSUM) && !bp->disable_tpa) {
4819 features &= ~NETIF_F_RXCSUM;
4820 features |= dev->features & NETIF_F_RXCSUM;
4821 }
4822
4823 if (changed & NETIF_F_LOOPBACK) {
4824 features &= ~NETIF_F_LOOPBACK;
4825 features |= dev->features & NETIF_F_LOOPBACK;
4826 }
4827 }
4828
4829 /* TPA requires Rx CSUM offloading */
4830 if (!(features & NETIF_F_RXCSUM)) {
4831 features &= ~NETIF_F_LRO;
4832 features &= ~NETIF_F_GRO;
4833 }
4834
4835 /* Note: do not disable SW GRO in kernel when HW GRO is off */
4836 if (bp->disable_tpa)
4837 features &= ~NETIF_F_LRO;
4838
4839 return features;
4840 }
4841
4842 int bnx2x_set_features(struct net_device *dev, netdev_features_t features)
4843 {
4844 struct bnx2x *bp = netdev_priv(dev);
4845 u32 flags = bp->flags;
4846 u32 changes;
4847 bool bnx2x_reload = false;
4848
4849 if (features & NETIF_F_LRO)
4850 flags |= TPA_ENABLE_FLAG;
4851 else
4852 flags &= ~TPA_ENABLE_FLAG;
4853
4854 if (features & NETIF_F_GRO)
4855 flags |= GRO_ENABLE_FLAG;
4856 else
4857 flags &= ~GRO_ENABLE_FLAG;
4858
4859 /* VFs or non SRIOV PFs should be able to change loopback feature */
4860 if (!pci_num_vf(bp->pdev)) {
4861 if (features & NETIF_F_LOOPBACK) {
4862 if (bp->link_params.loopback_mode != LOOPBACK_BMAC) {
4863 bp->link_params.loopback_mode = LOOPBACK_BMAC;
4864 bnx2x_reload = true;
4865 }
4866 } else {
4867 if (bp->link_params.loopback_mode != LOOPBACK_NONE) {
4868 bp->link_params.loopback_mode = LOOPBACK_NONE;
4869 bnx2x_reload = true;
4870 }
4871 }
4872 }
4873
4874 changes = flags ^ bp->flags;
4875
4876 /* if GRO is changed while LRO is enabled, don't force a reload */
4877 if ((changes & GRO_ENABLE_FLAG) && (flags & TPA_ENABLE_FLAG))
4878 changes &= ~GRO_ENABLE_FLAG;
4879
4880 /* if GRO is changed while HW TPA is off, don't force a reload */
4881 if ((changes & GRO_ENABLE_FLAG) && bp->disable_tpa)
4882 changes &= ~GRO_ENABLE_FLAG;
4883
4884 if (changes)
4885 bnx2x_reload = true;
4886
4887 bp->flags = flags;
4888
4889 if (bnx2x_reload) {
4890 if (bp->recovery_state == BNX2X_RECOVERY_DONE)
4891 return bnx2x_reload_if_running(dev);
4892 /* else: bnx2x_nic_load() will be called at end of recovery */
4893 }
4894
4895 return 0;
4896 }
4897
4898 void bnx2x_tx_timeout(struct net_device *dev)
4899 {
4900 struct bnx2x *bp = netdev_priv(dev);
4901
4902 #ifdef BNX2X_STOP_ON_ERROR
4903 if (!bp->panic)
4904 bnx2x_panic();
4905 #endif
4906
4907 /* This allows the netif to be shutdown gracefully before resetting */
4908 bnx2x_schedule_sp_rtnl(bp, BNX2X_SP_RTNL_TX_TIMEOUT, 0);
4909 }
4910
4911 int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
4912 {
4913 struct net_device *dev = pci_get_drvdata(pdev);
4914 struct bnx2x *bp;
4915
4916 if (!dev) {
4917 dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n");
4918 return -ENODEV;
4919 }
4920 bp = netdev_priv(dev);
4921
4922 rtnl_lock();
4923
4924 pci_save_state(pdev);
4925
4926 if (!netif_running(dev)) {
4927 rtnl_unlock();
4928 return 0;
4929 }
4930
4931 netif_device_detach(dev);
4932
4933 bnx2x_nic_unload(bp, UNLOAD_CLOSE, false);
4934
4935 bnx2x_set_power_state(bp, pci_choose_state(pdev, state));
4936
4937 rtnl_unlock();
4938
4939 return 0;
4940 }
4941
4942 int bnx2x_resume(struct pci_dev *pdev)
4943 {
4944 struct net_device *dev = pci_get_drvdata(pdev);
4945 struct bnx2x *bp;
4946 int rc;
4947
4948 if (!dev) {
4949 dev_err(&pdev->dev, "BAD net device from bnx2x_init_one\n");
4950 return -ENODEV;
4951 }
4952 bp = netdev_priv(dev);
4953
4954 if (pci_num_vf(bp->pdev)) {
4955 DP(BNX2X_MSG_IOV, "VFs are enabled, can not change MTU\n");
4956 return -EPERM;
4957 }
4958
4959 if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
4960 BNX2X_ERR("Handling parity error recovery. Try again later\n");
4961 return -EAGAIN;
4962 }
4963
4964 rtnl_lock();
4965
4966 pci_restore_state(pdev);
4967
4968 if (!netif_running(dev)) {
4969 rtnl_unlock();
4970 return 0;
4971 }
4972
4973 bnx2x_set_power_state(bp, PCI_D0);
4974 netif_device_attach(dev);
4975
4976 rc = bnx2x_nic_load(bp, LOAD_OPEN);
4977
4978 rtnl_unlock();
4979
4980 return rc;
4981 }
4982
4983 void bnx2x_set_ctx_validation(struct bnx2x *bp, struct eth_context *cxt,
4984 u32 cid)
4985 {
4986 if (!cxt) {
4987 BNX2X_ERR("bad context pointer %p\n", cxt);
4988 return;
4989 }
4990
4991 /* ustorm cxt validation */
4992 cxt->ustorm_ag_context.cdu_usage =
4993 CDU_RSRVD_VALUE_TYPE_A(HW_CID(bp, cid),
4994 CDU_REGION_NUMBER_UCM_AG, ETH_CONNECTION_TYPE);
4995 /* xcontext validation */
4996 cxt->xstorm_ag_context.cdu_reserved =
4997 CDU_RSRVD_VALUE_TYPE_A(HW_CID(bp, cid),
4998 CDU_REGION_NUMBER_XCM_AG, ETH_CONNECTION_TYPE);
4999 }
5000
5001 static void storm_memset_hc_timeout(struct bnx2x *bp, u8 port,
5002 u8 fw_sb_id, u8 sb_index,
5003 u8 ticks)
5004 {
5005 u32 addr = BAR_CSTRORM_INTMEM +
5006 CSTORM_STATUS_BLOCK_DATA_TIMEOUT_OFFSET(fw_sb_id, sb_index);
5007 REG_WR8(bp, addr, ticks);
5008 DP(NETIF_MSG_IFUP,
5009 "port %x fw_sb_id %d sb_index %d ticks %d\n",
5010 port, fw_sb_id, sb_index, ticks);
5011 }
5012
5013 static void storm_memset_hc_disable(struct bnx2x *bp, u8 port,
5014 u16 fw_sb_id, u8 sb_index,
5015 u8 disable)
5016 {
5017 u32 enable_flag = disable ? 0 : (1 << HC_INDEX_DATA_HC_ENABLED_SHIFT);
5018 u32 addr = BAR_CSTRORM_INTMEM +
5019 CSTORM_STATUS_BLOCK_DATA_FLAGS_OFFSET(fw_sb_id, sb_index);
5020 u8 flags = REG_RD8(bp, addr);
5021 /* clear and set */
5022 flags &= ~HC_INDEX_DATA_HC_ENABLED;
5023 flags |= enable_flag;
5024 REG_WR8(bp, addr, flags);
5025 DP(NETIF_MSG_IFUP,
5026 "port %x fw_sb_id %d sb_index %d disable %d\n",
5027 port, fw_sb_id, sb_index, disable);
5028 }
5029
5030 void bnx2x_update_coalesce_sb_index(struct bnx2x *bp, u8 fw_sb_id,
5031 u8 sb_index, u8 disable, u16 usec)
5032 {
5033 int port = BP_PORT(bp);
5034 u8 ticks = usec / BNX2X_BTR;
5035
5036 storm_memset_hc_timeout(bp, port, fw_sb_id, sb_index, ticks);
5037
5038 disable = disable ? 1 : (usec ? 0 : 1);
5039 storm_memset_hc_disable(bp, port, fw_sb_id, sb_index, disable);
5040 }
5041
5042 void bnx2x_schedule_sp_rtnl(struct bnx2x *bp, enum sp_rtnl_flag flag,
5043 u32 verbose)
5044 {
5045 smp_mb__before_atomic();
5046 set_bit(flag, &bp->sp_rtnl_state);
5047 smp_mb__after_atomic();
5048 DP((BNX2X_MSG_SP | verbose), "Scheduling sp_rtnl task [Flag: %d]\n",
5049 flag);
5050 schedule_delayed_work(&bp->sp_rtnl_task, 0);
5051 }
5052 EXPORT_SYMBOL(bnx2x_schedule_sp_rtnl);
Linux kernel - Deliverables
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