1 /*******************************************************************************
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2012 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *******************************************************************************/
29 #include <linux/if_ether.h>
30 #include <linux/gfp.h>
31 #include <linux/if_vlan.h>
32 #include <scsi/scsi_cmnd.h>
33 #include <scsi/scsi_device.h>
34 #include <scsi/fc/fc_fs.h>
35 #include <scsi/fc/fc_fcoe.h>
36 #include <scsi/libfc.h>
37 #include <scsi/libfcoe.h>
40 * ixgbe_fcoe_clear_ddp - clear the given ddp context
41 * @ddp: ptr to the ixgbe_fcoe_ddp
46 static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp)
57 * ixgbe_fcoe_ddp_put - free the ddp context for a given xid
58 * @netdev: the corresponding net_device
59 * @xid: the xid that corresponding ddp will be freed
61 * This is the implementation of net_device_ops.ndo_fcoe_ddp_done
62 * and it is expected to be called by ULD, i.e., FCP layer of libfc
63 * to release the corresponding ddp context when the I/O is done.
65 * Returns : data length already ddp-ed in bytes
67 int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
70 struct ixgbe_fcoe *fcoe;
71 struct ixgbe_adapter *adapter;
72 struct ixgbe_fcoe_ddp *ddp;
78 if (xid >= IXGBE_FCOE_DDP_MAX)
81 adapter = netdev_priv(netdev);
82 fcoe = &adapter->fcoe;
83 ddp = &fcoe->ddp[xid];
88 /* if there an error, force to invalidate ddp context */
90 spin_lock_bh(&fcoe->lock);
91 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLT, 0);
92 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLTRW,
93 (xid | IXGBE_FCFLTRW_WE));
94 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCBUFF, 0);
95 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW,
96 (xid | IXGBE_FCDMARW_WE));
98 /* guaranteed to be invalidated after 100us */
99 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW,
100 (xid | IXGBE_FCDMARW_RE));
101 fcbuff = IXGBE_READ_REG(&adapter->hw, IXGBE_FCBUFF);
102 spin_unlock_bh(&fcoe->lock);
103 if (fcbuff & IXGBE_FCBUFF_VALID)
107 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc,
110 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
114 ixgbe_fcoe_clear_ddp(ddp);
121 * ixgbe_fcoe_ddp_setup - called to set up ddp context
122 * @netdev: the corresponding net_device
123 * @xid: the exchange id requesting ddp
124 * @sgl: the scatter-gather list for this request
125 * @sgc: the number of scatter-gather items
127 * Returns : 1 for success and 0 for no ddp
129 static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
130 struct scatterlist *sgl, unsigned int sgc,
133 struct ixgbe_adapter *adapter;
135 struct ixgbe_fcoe *fcoe;
136 struct ixgbe_fcoe_ddp *ddp;
137 struct ixgbe_fcoe_ddp_pool *ddp_pool;
138 struct scatterlist *sg;
139 unsigned int i, j, dmacount;
141 static const unsigned int bufflen = IXGBE_FCBUFF_MIN;
142 unsigned int firstoff = 0;
143 unsigned int lastsize;
144 unsigned int thisoff = 0;
145 unsigned int thislen = 0;
146 u32 fcbuff, fcdmarw, fcfltrw, fcrxctl;
152 adapter = netdev_priv(netdev);
153 if (xid >= IXGBE_FCOE_DDP_MAX) {
154 e_warn(drv, "xid=0x%x out-of-range\n", xid);
158 /* no DDP if we are already down or resetting */
159 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
160 test_bit(__IXGBE_RESETTING, &adapter->state))
163 fcoe = &adapter->fcoe;
164 ddp = &fcoe->ddp[xid];
166 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
167 xid, ddp->sgl, ddp->sgc);
170 ixgbe_fcoe_clear_ddp(ddp);
173 if (!fcoe->ddp_pool) {
174 e_warn(drv, "No ddp_pool resources allocated\n");
178 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, get_cpu());
179 if (!ddp_pool->pool) {
180 e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);
184 /* setup dma from scsi command sgl */
185 dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
187 e_err(drv, "xid 0x%x DMA map error\n", xid);
191 /* alloc the udl from per cpu ddp pool */
192 ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp);
194 e_err(drv, "failed allocated ddp context\n");
195 goto out_noddp_unmap;
197 ddp->pool = ddp_pool->pool;
202 for_each_sg(sgl, sg, dmacount, i) {
203 addr = sg_dma_address(sg);
204 len = sg_dma_len(sg);
206 /* max number of buffers allowed in one DDP context */
207 if (j >= IXGBE_BUFFCNT_MAX) {
212 /* get the offset of length of current buffer */
213 thisoff = addr & ((dma_addr_t)bufflen - 1);
214 thislen = min((bufflen - thisoff), len);
216 * all but the 1st buffer (j == 0)
217 * must be aligned on bufflen
219 if ((j != 0) && (thisoff))
222 * all but the last buffer
223 * ((i == (dmacount - 1)) && (thislen == len))
224 * must end at bufflen
226 if (((i != (dmacount - 1)) || (thislen != len))
227 && ((thislen + thisoff) != bufflen))
230 ddp->udl[j] = (u64)(addr - thisoff);
231 /* only the first buffer may have none-zero offset */
239 /* only the last buffer may have non-full bufflen */
240 lastsize = thisoff + thislen;
243 * lastsize can not be buffer len.
244 * If it is then adding another buffer with lastsize = 1.
246 if (lastsize == bufflen) {
247 if (j >= IXGBE_BUFFCNT_MAX) {
248 ddp_pool->noddp_ext_buff++;
252 ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma);
258 fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT);
259 fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT);
260 fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT);
261 /* Set WRCONTX bit to allow DDP for target */
263 fcbuff |= (IXGBE_FCBUFF_WRCONTX);
264 fcbuff |= (IXGBE_FCBUFF_VALID);
267 fcdmarw |= IXGBE_FCDMARW_WE;
268 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT);
271 fcfltrw |= IXGBE_FCFLTRW_WE;
273 /* program DMA context */
275 spin_lock_bh(&fcoe->lock);
277 /* turn on last frame indication for target mode as FCP_RSPtarget is
278 * supposed to send FCP_RSP when it is done. */
279 if (target_mode && !test_bit(__IXGBE_FCOE_TARGET, &fcoe->mode)) {
280 set_bit(__IXGBE_FCOE_TARGET, &fcoe->mode);
281 fcrxctl = IXGBE_READ_REG(hw, IXGBE_FCRXCTRL);
282 fcrxctl |= IXGBE_FCRXCTRL_LASTSEQH;
283 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, fcrxctl);
286 IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32));
287 IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32);
288 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff);
289 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw);
290 /* program filter context */
291 IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0);
292 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID);
293 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw);
295 spin_unlock_bh(&fcoe->lock);
300 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
301 ixgbe_fcoe_clear_ddp(ddp);
304 dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
311 * ixgbe_fcoe_ddp_get - called to set up ddp context in initiator mode
312 * @netdev: the corresponding net_device
313 * @xid: the exchange id requesting ddp
314 * @sgl: the scatter-gather list for this request
315 * @sgc: the number of scatter-gather items
317 * This is the implementation of net_device_ops.ndo_fcoe_ddp_setup
318 * and is expected to be called from ULD, e.g., FCP layer of libfc
319 * to set up ddp for the corresponding xid of the given sglist for
320 * the corresponding I/O.
322 * Returns : 1 for success and 0 for no ddp
324 int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
325 struct scatterlist *sgl, unsigned int sgc)
327 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0);
331 * ixgbe_fcoe_ddp_target - called to set up ddp context in target mode
332 * @netdev: the corresponding net_device
333 * @xid: the exchange id requesting ddp
334 * @sgl: the scatter-gather list for this request
335 * @sgc: the number of scatter-gather items
337 * This is the implementation of net_device_ops.ndo_fcoe_ddp_target
338 * and is expected to be called from ULD, e.g., FCP layer of libfc
339 * to set up ddp for the corresponding xid of the given sglist for
340 * the corresponding I/O. The DDP in target mode is a write I/O request
341 * from the initiator.
343 * Returns : 1 for success and 0 for no ddp
345 int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid,
346 struct scatterlist *sgl, unsigned int sgc)
348 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1);
352 * ixgbe_fcoe_ddp - check ddp status and mark it done
353 * @adapter: ixgbe adapter
354 * @rx_desc: advanced rx descriptor
355 * @skb: the skb holding the received data
357 * This checks ddp status.
359 * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates
360 * not passing the skb to ULD, > 0 indicates is the length of data
363 int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
364 union ixgbe_adv_rx_desc *rx_desc,
368 struct ixgbe_fcoe *fcoe;
369 struct ixgbe_fcoe_ddp *ddp;
370 struct fc_frame_header *fh;
371 struct fcoe_crc_eof *crc;
372 __le32 fcerr = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCERR);
377 if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC))
378 skb->ip_summed = CHECKSUM_NONE;
380 skb->ip_summed = CHECKSUM_UNNECESSARY;
382 if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
383 fh = (struct fc_frame_header *)(skb->data +
384 sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr));
386 fh = (struct fc_frame_header *)(skb->data +
387 sizeof(struct fcoe_hdr));
389 fctl = ntoh24(fh->fh_f_ctl);
390 if (fctl & FC_FC_EX_CTX)
391 xid = be16_to_cpu(fh->fh_ox_id);
393 xid = be16_to_cpu(fh->fh_rx_id);
395 if (xid >= IXGBE_FCOE_DDP_MAX)
398 fcoe = &adapter->fcoe;
399 ddp = &fcoe->ddp[xid];
403 ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE |
404 IXGBE_RXDADV_ERR_FCERR);
408 switch (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_FCSTAT)) {
409 /* return 0 to bypass going to ULD for DDPed data */
410 case __constant_cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_DDP):
411 /* update length of DDPed data */
412 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
415 /* unmap the sg list when FCPRSP is received */
416 case __constant_cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_FCPRSP):
417 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl,
418 ddp->sgc, DMA_FROM_DEVICE);
423 /* if DDP length is present pass it through to ULD */
424 case __constant_cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NODDP):
425 /* update length of DDPed data */
426 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
430 /* no match will return as an error */
431 case __constant_cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH):
436 /* In target mode, check the last data frame of the sequence.
437 * For DDP in target mode, data is already DDPed but the header
438 * indication of the last data frame ould allow is to tell if we
439 * got all the data and the ULP can send FCP_RSP back, as this is
440 * not a full fcoe frame, we fill the trailer here so it won't be
441 * dropped by the ULP stack.
443 if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) &&
444 (fctl & FC_FC_END_SEQ)) {
446 crc = (struct fcoe_crc_eof *)skb_put(skb, sizeof(*crc));
447 crc->fcoe_eof = FC_EOF_T;
454 * ixgbe_fso - ixgbe FCoE Sequence Offload (FSO)
455 * @tx_ring: tx desc ring
456 * @first: first tx_buffer structure containing skb, tx_flags, and protocol
457 * @hdr_len: hdr_len to be returned
459 * This sets up large send offload for FCoE
461 * Returns : 0 indicates success, < 0 for error
463 int ixgbe_fso(struct ixgbe_ring *tx_ring,
464 struct ixgbe_tx_buffer *first,
467 struct sk_buff *skb = first->skb;
468 struct fc_frame_header *fh;
470 u32 fcoe_sof_eof = 0;
474 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) {
475 dev_err(tx_ring->dev, "Wrong gso type %d:expecting SKB_GSO_FCOE\n",
476 skb_shinfo(skb)->gso_type);
480 /* resets the header to point fcoe/fc */
481 skb_set_network_header(skb, skb->mac_len);
482 skb_set_transport_header(skb, skb->mac_len +
483 sizeof(struct fcoe_hdr));
485 /* sets up SOF and ORIS */
486 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof;
489 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS;
492 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF |
493 IXGBE_ADVTXD_FCOEF_ORIS;
498 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF;
501 dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof);
505 /* the first byte of the last dword is EOF */
506 skb_copy_bits(skb, skb->len - 4, &eof, 1);
507 /* sets up EOF and ORIE */
510 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
515 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N |
516 IXGBE_ADVTXD_FCOEF_ORIE;
518 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T;
521 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI;
524 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A;
527 dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof);
531 /* sets up PARINC indicating data offset */
532 fh = (struct fc_frame_header *)skb_transport_header(skb);
533 if (fh->fh_f_ctl[2] & FC_FC_REL_OFF)
534 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC;
536 /* include trailer in headlen as it is replicated per frame */
537 *hdr_len = sizeof(struct fcoe_crc_eof);
539 /* hdr_len includes fc_hdr if FCoE LSO is enabled */
540 if (skb_is_gso(skb)) {
541 *hdr_len += skb_transport_offset(skb) +
542 sizeof(struct fc_frame_header);
543 /* update gso_segs and bytecount */
544 first->gso_segs = DIV_ROUND_UP(skb->len - *hdr_len,
545 skb_shinfo(skb)->gso_size);
546 first->bytecount += (first->gso_segs - 1) * *hdr_len;
547 first->tx_flags |= IXGBE_TX_FLAGS_FSO;
550 /* set flag indicating FCOE to ixgbe_tx_map call */
551 first->tx_flags |= IXGBE_TX_FLAGS_FCOE;
553 /* mss_l4len_id: use 1 for FSO as TSO, no need for L4LEN */
554 mss_l4len_idx = skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
555 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
557 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
558 vlan_macip_lens = skb_transport_offset(skb) +
559 sizeof(struct fc_frame_header);
560 vlan_macip_lens |= (skb_transport_offset(skb) - 4)
561 << IXGBE_ADVTXD_MACLEN_SHIFT;
562 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
564 /* write context desc */
565 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof,
566 IXGBE_ADVTXT_TUCMD_FCOE, mss_l4len_idx);
571 static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu)
573 struct ixgbe_fcoe_ddp_pool *ddp_pool;
575 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
577 dma_pool_destroy(ddp_pool->pool);
578 ddp_pool->pool = NULL;
581 static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe,
585 struct ixgbe_fcoe_ddp_pool *ddp_pool;
586 struct dma_pool *pool;
589 snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%d", cpu);
591 pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX,
592 IXGBE_FCPTR_ALIGN, PAGE_SIZE);
596 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
597 ddp_pool->pool = pool;
599 ddp_pool->noddp_ext_buff = 0;
605 * ixgbe_configure_fcoe - configures registers for fcoe at start
606 * @adapter: ptr to ixgbe adapter
608 * This sets up FCoE related registers
612 void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
614 struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE];
615 struct ixgbe_hw *hw = &adapter->hw;
616 int i, fcoe_q, fcoe_i;
619 /* Minimal functionality for FCoE requires at least CRC offloads */
620 if (!(adapter->netdev->features & NETIF_F_FCOE_CRC))
623 /* Enable L2 EtherType filter for FCoE, needed for FCoE CRC and DDP */
624 etqf = ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN;
625 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
626 etqf |= IXGBE_ETQF_POOL_ENABLE;
627 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT;
629 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf);
630 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0);
632 /* leave registers un-configured if FCoE is disabled */
633 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
636 /* Use one or more Rx queues for FCoE by redirection table */
637 for (i = 0; i < IXGBE_FCRETA_SIZE; i++) {
638 fcoe_i = fcoe->offset + (i % fcoe->indices);
639 fcoe_i &= IXGBE_FCRETA_ENTRY_MASK;
640 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
641 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
643 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA);
645 /* Enable L2 EtherType filter for FIP */
646 etqf = ETH_P_FIP | IXGBE_ETQF_FILTER_EN;
647 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
648 etqf |= IXGBE_ETQF_POOL_ENABLE;
649 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT;
651 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf);
653 /* Send FIP frames to the first FCoE queue */
654 fcoe_q = adapter->rx_ring[fcoe->offset]->reg_idx;
655 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP),
656 IXGBE_ETQS_QUEUE_EN |
657 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
659 /* Configure FCoE Rx control */
660 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
661 IXGBE_FCRXCTRL_FCCRCBO |
662 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
666 * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources
667 * @adapter : ixgbe adapter
669 * Cleans up outstanding ddp context resources
673 void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
675 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
678 /* do nothing if no DDP pools were allocated */
682 for (i = 0; i < IXGBE_FCOE_DDP_MAX; i++)
683 ixgbe_fcoe_ddp_put(adapter->netdev, i);
685 for_each_possible_cpu(cpu)
686 ixgbe_fcoe_dma_pool_free(fcoe, cpu);
688 dma_unmap_single(&adapter->pdev->dev,
689 fcoe->extra_ddp_buffer_dma,
692 kfree(fcoe->extra_ddp_buffer);
694 fcoe->extra_ddp_buffer = NULL;
695 fcoe->extra_ddp_buffer_dma = 0;
699 * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources
700 * @adapter: ixgbe adapter
702 * Sets up ddp context resouces
704 * Returns : 0 indicates success or -EINVAL on failure
706 int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
708 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
709 struct device *dev = &adapter->pdev->dev;
714 /* do nothing if no DDP pools were allocated */
718 /* Extra buffer to be shared by all DDPs for HW work around */
719 buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_ATOMIC);
721 e_err(drv, "failed to allocate extra DDP buffer\n");
725 dma = dma_map_single(dev, buffer, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE);
726 if (dma_mapping_error(dev, dma)) {
727 e_err(drv, "failed to map extra DDP buffer\n");
732 fcoe->extra_ddp_buffer = buffer;
733 fcoe->extra_ddp_buffer_dma = dma;
735 /* allocate pci pool for each cpu */
736 for_each_possible_cpu(cpu) {
737 int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu);
741 e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu);
742 ixgbe_free_fcoe_ddp_resources(adapter);
749 static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter)
751 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
753 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
756 fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool);
758 if (!fcoe->ddp_pool) {
759 e_err(drv, "failed to allocate percpu DDP resources\n");
763 adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
768 static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter)
770 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
772 adapter->netdev->fcoe_ddp_xid = 0;
777 free_percpu(fcoe->ddp_pool);
778 fcoe->ddp_pool = NULL;
782 * ixgbe_fcoe_enable - turn on FCoE offload feature
783 * @netdev: the corresponding netdev
785 * Turns on FCoE offload feature in 82599.
787 * Returns : 0 indicates success or -EINVAL on failure
789 int ixgbe_fcoe_enable(struct net_device *netdev)
791 struct ixgbe_adapter *adapter = netdev_priv(netdev);
792 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
794 atomic_inc(&fcoe->refcnt);
796 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
799 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
802 e_info(drv, "Enabling FCoE offload features.\n");
804 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
805 e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n");
807 if (netif_running(netdev))
808 netdev->netdev_ops->ndo_stop(netdev);
810 /* Allocate per CPU memory to track DDP pools */
811 ixgbe_fcoe_ddp_enable(adapter);
813 /* enable FCoE and notify stack */
814 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
815 netdev->features |= NETIF_F_FCOE_MTU;
816 netdev_features_change(netdev);
818 /* release existing queues and reallocate them */
819 ixgbe_clear_interrupt_scheme(adapter);
820 ixgbe_init_interrupt_scheme(adapter);
822 if (netif_running(netdev))
823 netdev->netdev_ops->ndo_open(netdev);
829 * ixgbe_fcoe_disable - turn off FCoE offload feature
830 * @netdev: the corresponding netdev
832 * Turns off FCoE offload feature in 82599.
834 * Returns : 0 indicates success or -EINVAL on failure
836 int ixgbe_fcoe_disable(struct net_device *netdev)
838 struct ixgbe_adapter *adapter = netdev_priv(netdev);
840 if (!atomic_dec_and_test(&adapter->fcoe.refcnt))
843 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
846 e_info(drv, "Disabling FCoE offload features.\n");
847 if (netif_running(netdev))
848 netdev->netdev_ops->ndo_stop(netdev);
850 /* Free per CPU memory to track DDP pools */
851 ixgbe_fcoe_ddp_disable(adapter);
853 /* disable FCoE and notify stack */
854 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
855 netdev->features &= ~NETIF_F_FCOE_MTU;
857 netdev_features_change(netdev);
859 /* release existing queues and reallocate them */
860 ixgbe_clear_interrupt_scheme(adapter);
861 ixgbe_init_interrupt_scheme(adapter);
863 if (netif_running(netdev))
864 netdev->netdev_ops->ndo_open(netdev);
870 * ixgbe_fcoe_get_wwn - get world wide name for the node or the port
871 * @netdev : ixgbe adapter
872 * @wwn : the world wide name
873 * @type: the type of world wide name
875 * Returns the node or port world wide name if both the prefix and the san
876 * mac address are valid, then the wwn is formed based on the NAA-2 for
877 * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3).
879 * Returns : 0 on success
881 int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
885 struct ixgbe_adapter *adapter = netdev_priv(netdev);
886 struct ixgbe_mac_info *mac = &adapter->hw.mac;
889 case NETDEV_FCOE_WWNN:
890 prefix = mac->wwnn_prefix;
892 case NETDEV_FCOE_WWPN:
893 prefix = mac->wwpn_prefix;
899 if ((prefix != 0xffff) &&
900 is_valid_ether_addr(mac->san_addr)) {
901 *wwn = ((u64) prefix << 48) |
902 ((u64) mac->san_addr[0] << 40) |
903 ((u64) mac->san_addr[1] << 32) |
904 ((u64) mac->san_addr[2] << 24) |
905 ((u64) mac->san_addr[3] << 16) |
906 ((u64) mac->san_addr[4] << 8) |
907 ((u64) mac->san_addr[5]);
914 * ixgbe_fcoe_get_hbainfo - get FCoE HBA information
915 * @netdev : ixgbe adapter
916 * @info : HBA information
918 * Returns ixgbe HBA information
920 * Returns : 0 on success
922 int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
923 struct netdev_fcoe_hbainfo *info)
925 struct ixgbe_adapter *adapter = netdev_priv(netdev);
926 struct ixgbe_hw *hw = &adapter->hw;
933 /* Don't return information on unsupported devices */
934 if (hw->mac.type != ixgbe_mac_82599EB &&
935 hw->mac.type != ixgbe_mac_X540)
939 snprintf(info->manufacturer, sizeof(info->manufacturer),
940 "Intel Corporation");
944 /* Get the PCI-e Device Serial Number Capability */
945 pos = pci_find_ext_capability(adapter->pdev, PCI_EXT_CAP_ID_DSN);
948 for (i = 0; i < 8; i++)
949 pci_read_config_byte(adapter->pdev, pos + i, &buf[i]);
951 snprintf(info->serial_number, sizeof(info->serial_number),
952 "%02X%02X%02X%02X%02X%02X%02X%02X",
953 buf[7], buf[6], buf[5], buf[4],
954 buf[3], buf[2], buf[1], buf[0]);
956 snprintf(info->serial_number, sizeof(info->serial_number),
959 /* Hardware Version */
960 snprintf(info->hardware_version,
961 sizeof(info->hardware_version),
962 "Rev %d", hw->revision_id);
963 /* Driver Name/Version */
964 snprintf(info->driver_version,
965 sizeof(info->driver_version),
968 ixgbe_driver_version);
969 /* Firmware Version */
970 snprintf(info->firmware_version,
971 sizeof(info->firmware_version),
973 (adapter->eeprom_verh << 16) |
974 adapter->eeprom_verl);
977 if (hw->mac.type == ixgbe_mac_82599EB) {
978 snprintf(info->model,
982 snprintf(info->model,
987 /* Model Description */
988 snprintf(info->model_description,
989 sizeof(info->model_description),
991 ixgbe_default_device_descr);
997 * ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to
998 * @adapter - pointer to the device adapter structure
1000 * Return : TC that FCoE is mapped to
1002 u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter)
1004 #ifdef CONFIG_IXGBE_DCB
1005 return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up);