1 /*******************************************************************************
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2010 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 #ifdef CONFIG_IXGBE_DCB
30 #include "ixgbe_dcb_82599.h"
31 #endif /* CONFIG_IXGBE_DCB */
32 #include <linux/if_ether.h>
33 #include <linux/gfp.h>
34 #include <linux/if_vlan.h>
35 #include <scsi/scsi_cmnd.h>
36 #include <scsi/scsi_device.h>
37 #include <scsi/fc/fc_fs.h>
38 #include <scsi/fc/fc_fcoe.h>
39 #include <scsi/libfc.h>
40 #include <scsi/libfcoe.h>
43 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
44 * @rx_desc: advanced rx descriptor
46 * Returns : true if it is FCoE pkt
48 static inline bool ixgbe_rx_is_fcoe(union ixgbe_adv_rx_desc *rx_desc)
52 p = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info);
53 if (p & IXGBE_RXDADV_PKTTYPE_ETQF) {
54 p &= IXGBE_RXDADV_PKTTYPE_ETQF_MASK;
55 p >>= IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT;
56 return p == IXGBE_ETQF_FILTER_FCOE;
62 * ixgbe_fcoe_clear_ddp - clear the given ddp context
63 * @ddp - ptr to the ixgbe_fcoe_ddp
68 static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp)
79 * ixgbe_fcoe_ddp_put - free the ddp context for a given xid
80 * @netdev: the corresponding net_device
81 * @xid: the xid that corresponding ddp will be freed
83 * This is the implementation of net_device_ops.ndo_fcoe_ddp_done
84 * and it is expected to be called by ULD, i.e., FCP layer of libfc
85 * to release the corresponding ddp context when the I/O is done.
87 * Returns : data length already ddp-ed in bytes
89 int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
92 struct ixgbe_fcoe *fcoe;
93 struct ixgbe_adapter *adapter;
94 struct ixgbe_fcoe_ddp *ddp;
99 if (xid >= IXGBE_FCOE_DDP_MAX)
102 adapter = netdev_priv(netdev);
103 fcoe = &adapter->fcoe;
104 ddp = &fcoe->ddp[xid];
109 /* if there an error, force to invalidate ddp context */
111 spin_lock_bh(&fcoe->lock);
112 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLT, 0);
113 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLTRW,
114 (xid | IXGBE_FCFLTRW_WE));
115 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCBUFF, 0);
116 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW,
117 (xid | IXGBE_FCDMARW_WE));
118 spin_unlock_bh(&fcoe->lock);
121 pci_unmap_sg(adapter->pdev, ddp->sgl, ddp->sgc,
123 pci_pool_free(fcoe->pool, ddp->udl, ddp->udp);
124 ixgbe_fcoe_clear_ddp(ddp);
131 * ixgbe_fcoe_ddp_get - called to set up ddp context
132 * @netdev: the corresponding net_device
133 * @xid: the exchange id requesting ddp
134 * @sgl: the scatter-gather list for this request
135 * @sgc: the number of scatter-gather items
137 * This is the implementation of net_device_ops.ndo_fcoe_ddp_setup
138 * and is expected to be called from ULD, e.g., FCP layer of libfc
139 * to set up ddp for the corresponding xid of the given sglist for
140 * the corresponding I/O.
142 * Returns : 1 for success and 0 for no ddp
144 int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
145 struct scatterlist *sgl, unsigned int sgc)
147 struct ixgbe_adapter *adapter;
149 struct ixgbe_fcoe *fcoe;
150 struct ixgbe_fcoe_ddp *ddp;
151 struct scatterlist *sg;
152 unsigned int i, j, dmacount;
154 static const unsigned int bufflen = 4096;
155 unsigned int firstoff = 0;
156 unsigned int lastsize;
157 unsigned int thisoff = 0;
158 unsigned int thislen = 0;
159 u32 fcbuff, fcdmarw, fcfltrw;
165 adapter = netdev_priv(netdev);
166 if (xid >= IXGBE_FCOE_DDP_MAX) {
167 e_warn(drv, "xid=0x%x out-of-range\n", xid);
171 fcoe = &adapter->fcoe;
173 e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);
177 ddp = &fcoe->ddp[xid];
179 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
180 xid, ddp->sgl, ddp->sgc);
183 ixgbe_fcoe_clear_ddp(ddp);
185 /* setup dma from scsi command sgl */
186 dmacount = pci_map_sg(adapter->pdev, sgl, sgc, DMA_FROM_DEVICE);
188 e_err(drv, "xid 0x%x DMA map error\n", xid);
192 /* alloc the udl from our ddp pool */
193 ddp->udl = pci_pool_alloc(fcoe->pool, GFP_ATOMIC, &ddp->udp);
195 e_err(drv, "failed allocated ddp context\n");
196 goto out_noddp_unmap;
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) {
208 e_err(drv, "xid=%x:%d,%d,%d:addr=%llx "
209 "not enough descriptors\n",
210 xid, i, j, dmacount, (u64)addr);
214 /* get the offset of length of current buffer */
215 thisoff = addr & ((dma_addr_t)bufflen - 1);
216 thislen = min((bufflen - thisoff), len);
218 * all but the 1st buffer (j == 0)
219 * must be aligned on bufflen
221 if ((j != 0) && (thisoff))
224 * all but the last buffer
225 * ((i == (dmacount - 1)) && (thislen == len))
226 * must end at bufflen
228 if (((i != (dmacount - 1)) || (thislen != len))
229 && ((thislen + thisoff) != bufflen))
232 ddp->udl[j] = (u64)(addr - thisoff);
233 /* only the first buffer may have none-zero offset */
241 /* only the last buffer may have non-full bufflen */
242 lastsize = thisoff + thislen;
244 fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT);
245 fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT);
246 fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT);
247 fcbuff |= (IXGBE_FCBUFF_VALID);
250 fcdmarw |= IXGBE_FCDMARW_WE;
251 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT);
254 fcfltrw |= IXGBE_FCFLTRW_WE;
256 /* program DMA context */
258 spin_lock_bh(&fcoe->lock);
259 IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32));
260 IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32);
261 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff);
262 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw);
263 /* program filter context */
264 IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0);
265 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID);
266 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw);
267 spin_unlock_bh(&fcoe->lock);
272 pci_pool_free(fcoe->pool, ddp->udl, ddp->udp);
273 ixgbe_fcoe_clear_ddp(ddp);
276 pci_unmap_sg(adapter->pdev, sgl, sgc, DMA_FROM_DEVICE);
281 * ixgbe_fcoe_ddp - check ddp status and mark it done
282 * @adapter: ixgbe adapter
283 * @rx_desc: advanced rx descriptor
284 * @skb: the skb holding the received data
286 * This checks ddp status.
288 * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates
289 * not passing the skb to ULD, > 0 indicates is the length of data
292 int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
293 union ixgbe_adv_rx_desc *rx_desc,
298 u32 sterr, fceofe, fcerr, fcstat;
300 struct ixgbe_fcoe *fcoe;
301 struct ixgbe_fcoe_ddp *ddp;
302 struct fc_frame_header *fh;
304 if (!ixgbe_rx_is_fcoe(rx_desc))
307 skb->ip_summed = CHECKSUM_UNNECESSARY;
308 sterr = le32_to_cpu(rx_desc->wb.upper.status_error);
309 fcerr = (sterr & IXGBE_RXDADV_ERR_FCERR);
310 fceofe = (sterr & IXGBE_RXDADV_ERR_FCEOFE);
311 if (fcerr == IXGBE_FCERR_BADCRC)
312 skb->ip_summed = CHECKSUM_NONE;
314 if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
315 fh = (struct fc_frame_header *)(skb->data +
316 sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr));
318 fh = (struct fc_frame_header *)(skb->data +
319 sizeof(struct fcoe_hdr));
320 fctl = ntoh24(fh->fh_f_ctl);
321 if (fctl & FC_FC_EX_CTX)
322 xid = be16_to_cpu(fh->fh_ox_id);
324 xid = be16_to_cpu(fh->fh_rx_id);
326 if (xid >= IXGBE_FCOE_DDP_MAX)
329 fcoe = &adapter->fcoe;
330 ddp = &fcoe->ddp[xid];
334 ddp->err = (fcerr | fceofe);
338 fcstat = (sterr & IXGBE_RXDADV_STAT_FCSTAT);
340 /* update length of DDPed data */
341 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
342 /* unmap the sg list when FCP_RSP is received */
343 if (fcstat == IXGBE_RXDADV_STAT_FCSTAT_FCPRSP) {
344 pci_unmap_sg(adapter->pdev, ddp->sgl,
345 ddp->sgc, DMA_FROM_DEVICE);
349 /* return 0 to bypass going to ULD for DDPed data */
350 if (fcstat == IXGBE_RXDADV_STAT_FCSTAT_DDP)
361 * ixgbe_fso - ixgbe FCoE Sequence Offload (FSO)
362 * @adapter: ixgbe adapter
363 * @tx_ring: tx desc ring
364 * @skb: associated skb
365 * @tx_flags: tx flags
366 * @hdr_len: hdr_len to be returned
368 * This sets up large send offload for FCoE
370 * Returns : 0 indicates no FSO, > 0 for FSO, < 0 for error
372 int ixgbe_fso(struct ixgbe_adapter *adapter,
373 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
374 u32 tx_flags, u8 *hdr_len)
383 struct ixgbe_tx_buffer *tx_buffer_info;
384 struct ixgbe_adv_tx_context_desc *context_desc;
385 struct fc_frame_header *fh;
387 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) {
388 e_err(drv, "Wrong gso type %d:expecting SKB_GSO_FCOE\n",
389 skb_shinfo(skb)->gso_type);
393 /* resets the header to point fcoe/fc */
394 skb_set_network_header(skb, skb->mac_len);
395 skb_set_transport_header(skb, skb->mac_len +
396 sizeof(struct fcoe_hdr));
398 /* sets up SOF and ORIS */
400 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof;
403 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_ORIS;
406 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_SOF;
407 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_ORIS;
412 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_SOF;
415 e_warn(drv, "unknown sof = 0x%x\n", sof);
419 /* the first byte of the last dword is EOF */
420 skb_copy_bits(skb, skb->len - 4, &eof, 1);
421 /* sets up EOF and ORIE */
424 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
428 if (skb_is_gso(skb)) {
429 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
430 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_ORIE;
432 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T;
436 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI;
439 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A;
442 e_warn(drv, "unknown eof = 0x%x\n", eof);
446 /* sets up PARINC indicating data offset */
447 fh = (struct fc_frame_header *)skb_transport_header(skb);
448 if (fh->fh_f_ctl[2] & FC_FC_REL_OFF)
449 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC;
451 /* hdr_len includes fc_hdr if FCoE lso is enabled */
452 *hdr_len = sizeof(struct fcoe_crc_eof);
454 *hdr_len += (skb_transport_offset(skb) +
455 sizeof(struct fc_frame_header));
456 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
457 vlan_macip_lens = (skb_transport_offset(skb) +
458 sizeof(struct fc_frame_header));
459 vlan_macip_lens |= ((skb_transport_offset(skb) - 4)
460 << IXGBE_ADVTXD_MACLEN_SHIFT);
461 vlan_macip_lens |= (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
463 /* type_tycmd and mss: set TUCMD.FCoE to enable offload */
464 type_tucmd = IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT |
465 IXGBE_ADVTXT_TUCMD_FCOE;
467 mss = skb_shinfo(skb)->gso_size;
468 /* mss_l4len_id: use 1 for FSO as TSO, no need for L4LEN */
469 mss_l4len_idx = (mss << IXGBE_ADVTXD_MSS_SHIFT) |
470 (1 << IXGBE_ADVTXD_IDX_SHIFT);
472 /* write context desc */
473 i = tx_ring->next_to_use;
474 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
475 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
476 context_desc->seqnum_seed = cpu_to_le32(fcoe_sof_eof);
477 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
478 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
480 tx_buffer_info = &tx_ring->tx_buffer_info[i];
481 tx_buffer_info->time_stamp = jiffies;
482 tx_buffer_info->next_to_watch = i;
485 if (i == tx_ring->count)
487 tx_ring->next_to_use = i;
489 return skb_is_gso(skb);
493 * ixgbe_configure_fcoe - configures registers for fcoe at start
494 * @adapter: ptr to ixgbe adapter
496 * This sets up FCoE related registers
500 void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
502 int i, fcoe_q, fcoe_i;
503 struct ixgbe_hw *hw = &adapter->hw;
504 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
505 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
506 #ifdef CONFIG_IXGBE_DCB
511 /* create the pool for ddp if not created yet */
513 /* allocate ddp pool */
514 fcoe->pool = pci_pool_create("ixgbe_fcoe_ddp",
515 adapter->pdev, IXGBE_FCPTR_MAX,
516 IXGBE_FCPTR_ALIGN, PAGE_SIZE);
518 e_err(drv, "failed to allocated FCoE DDP pool\n");
520 spin_lock_init(&fcoe->lock);
523 /* Enable L2 eth type filter for FCoE */
524 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE),
525 (ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN));
526 /* Enable L2 eth type filter for FIP */
527 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP),
528 (ETH_P_FIP | IXGBE_ETQF_FILTER_EN));
529 if (adapter->ring_feature[RING_F_FCOE].indices) {
530 /* Use multiple rx queues for FCoE by redirection table */
531 for (i = 0; i < IXGBE_FCRETA_SIZE; i++) {
532 fcoe_i = f->mask + i % f->indices;
533 fcoe_i &= IXGBE_FCRETA_ENTRY_MASK;
534 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
535 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
537 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA);
538 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0);
540 /* Use single rx queue for FCoE */
542 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
543 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, 0);
544 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE),
545 IXGBE_ETQS_QUEUE_EN |
546 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
548 /* send FIP frames to the first FCoE queue */
550 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
551 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP),
552 IXGBE_ETQS_QUEUE_EN |
553 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
555 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
556 IXGBE_FCRXCTRL_FCOELLI |
557 IXGBE_FCRXCTRL_FCCRCBO |
558 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
559 #ifdef CONFIG_IXGBE_DCB
560 up2tc = IXGBE_READ_REG(&adapter->hw, IXGBE_RTTUP2TC);
561 for (i = 0; i < MAX_USER_PRIORITY; i++) {
562 tc = (u8)(up2tc >> (i * IXGBE_RTTUP2TC_UP_SHIFT));
563 tc &= (MAX_TRAFFIC_CLASS - 1);
564 if (fcoe->tc == tc) {
573 * ixgbe_cleanup_fcoe - release all fcoe ddp context resources
574 * @adapter : ixgbe adapter
576 * Cleans up outstanding ddp context resources
580 void ixgbe_cleanup_fcoe(struct ixgbe_adapter *adapter)
583 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
585 /* release ddp resource */
587 for (i = 0; i < IXGBE_FCOE_DDP_MAX; i++)
588 ixgbe_fcoe_ddp_put(adapter->netdev, i);
589 pci_pool_destroy(fcoe->pool);
595 * ixgbe_fcoe_enable - turn on FCoE offload feature
596 * @netdev: the corresponding netdev
598 * Turns on FCoE offload feature in 82599.
600 * Returns : 0 indicates success or -EINVAL on failure
602 int ixgbe_fcoe_enable(struct net_device *netdev)
605 struct ixgbe_adapter *adapter = netdev_priv(netdev);
608 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
611 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
614 e_info(drv, "Enabling FCoE offload features.\n");
615 if (netif_running(netdev))
616 netdev->netdev_ops->ndo_stop(netdev);
618 ixgbe_clear_interrupt_scheme(adapter);
620 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
621 adapter->ring_feature[RING_F_FCOE].indices = IXGBE_FCRETA_SIZE;
622 netdev->features |= NETIF_F_FCOE_CRC;
623 netdev->features |= NETIF_F_FSO;
624 netdev->features |= NETIF_F_FCOE_MTU;
625 netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
627 ixgbe_init_interrupt_scheme(adapter);
628 netdev_features_change(netdev);
630 if (netif_running(netdev))
631 netdev->netdev_ops->ndo_open(netdev);
639 * ixgbe_fcoe_disable - turn off FCoE offload feature
640 * @netdev: the corresponding netdev
642 * Turns off FCoE offload feature in 82599.
644 * Returns : 0 indicates success or -EINVAL on failure
646 int ixgbe_fcoe_disable(struct net_device *netdev)
649 struct ixgbe_adapter *adapter = netdev_priv(netdev);
651 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
654 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
657 e_info(drv, "Disabling FCoE offload features.\n");
658 netdev->features &= ~NETIF_F_FCOE_CRC;
659 netdev->features &= ~NETIF_F_FSO;
660 netdev->features &= ~NETIF_F_FCOE_MTU;
661 netdev->fcoe_ddp_xid = 0;
662 netdev_features_change(netdev);
664 if (netif_running(netdev))
665 netdev->netdev_ops->ndo_stop(netdev);
667 ixgbe_clear_interrupt_scheme(adapter);
668 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
669 adapter->ring_feature[RING_F_FCOE].indices = 0;
670 ixgbe_cleanup_fcoe(adapter);
671 ixgbe_init_interrupt_scheme(adapter);
673 if (netif_running(netdev))
674 netdev->netdev_ops->ndo_open(netdev);
681 #ifdef CONFIG_IXGBE_DCB
683 * ixgbe_fcoe_getapp - retrieves current user priority bitmap for FCoE
684 * @adapter : ixgbe adapter
686 * Finds out the corresponding user priority bitmap from the current
687 * traffic class that FCoE belongs to. Returns 0 as the invalid user
688 * priority bitmap to indicate an error.
690 * Returns : 802.1p user priority bitmap for FCoE
692 u8 ixgbe_fcoe_getapp(struct ixgbe_adapter *adapter)
694 return 1 << adapter->fcoe.up;
698 * ixgbe_fcoe_setapp - sets the user priority bitmap for FCoE
699 * @adapter : ixgbe adapter
700 * @up : 802.1p user priority bitmap
702 * Finds out the traffic class from the input user priority
705 * Returns : 0 on success otherwise returns 1 on error
707 u8 ixgbe_fcoe_setapp(struct ixgbe_adapter *adapter, u8 up)
712 /* valid user priority bitmap must not be 0 */
714 /* from user priority to the corresponding traffic class */
715 up2tc = IXGBE_READ_REG(&adapter->hw, IXGBE_RTTUP2TC);
716 for (i = 0; i < MAX_USER_PRIORITY; i++) {
718 up2tc >>= (i * IXGBE_RTTUP2TC_UP_SHIFT);
719 up2tc &= (MAX_TRAFFIC_CLASS - 1);
720 adapter->fcoe.tc = (u8)up2tc;
721 adapter->fcoe.up = i;
729 #endif /* CONFIG_IXGBE_DCB */
732 * ixgbe_fcoe_get_wwn - get world wide name for the node or the port
733 * @netdev : ixgbe adapter
734 * @wwn : the world wide name
735 * @type: the type of world wide name
737 * Returns the node or port world wide name if both the prefix and the san
738 * mac address are valid, then the wwn is formed based on the NAA-2 for
739 * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3).
741 * Returns : 0 on success
743 int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
747 struct ixgbe_adapter *adapter = netdev_priv(netdev);
748 struct ixgbe_mac_info *mac = &adapter->hw.mac;
751 case NETDEV_FCOE_WWNN:
752 prefix = mac->wwnn_prefix;
754 case NETDEV_FCOE_WWPN:
755 prefix = mac->wwpn_prefix;
761 if ((prefix != 0xffff) &&
762 is_valid_ether_addr(mac->san_addr)) {
763 *wwn = ((u64) prefix << 48) |
764 ((u64) mac->san_addr[0] << 40) |
765 ((u64) mac->san_addr[1] << 32) |
766 ((u64) mac->san_addr[2] << 24) |
767 ((u64) mac->san_addr[3] << 16) |
768 ((u64) mac->san_addr[4] << 8) |
769 ((u64) mac->san_addr[5]);