1 /*******************************************************************************
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2011 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;
100 if (xid >= IXGBE_FCOE_DDP_MAX)
103 adapter = netdev_priv(netdev);
104 fcoe = &adapter->fcoe;
105 ddp = &fcoe->ddp[xid];
110 /* if there an error, force to invalidate ddp context */
112 spin_lock_bh(&fcoe->lock);
113 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLT, 0);
114 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCFLTRW,
115 (xid | IXGBE_FCFLTRW_WE));
116 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCBUFF, 0);
117 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW,
118 (xid | IXGBE_FCDMARW_WE));
120 /* guaranteed to be invalidated after 100us */
121 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCDMARW,
122 (xid | IXGBE_FCDMARW_RE));
123 fcbuff = IXGBE_READ_REG(&adapter->hw, IXGBE_FCBUFF);
124 spin_unlock_bh(&fcoe->lock);
125 if (fcbuff & IXGBE_FCBUFF_VALID)
129 pci_unmap_sg(adapter->pdev, ddp->sgl, ddp->sgc,
131 pci_pool_free(fcoe->pool, ddp->udl, ddp->udp);
132 ixgbe_fcoe_clear_ddp(ddp);
140 * ixgbe_fcoe_ddp_setup - called to set up ddp context
141 * @netdev: the corresponding net_device
142 * @xid: the exchange id requesting ddp
143 * @sgl: the scatter-gather list for this request
144 * @sgc: the number of scatter-gather items
146 * Returns : 1 for success and 0 for no ddp
148 static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
149 struct scatterlist *sgl, unsigned int sgc,
152 struct ixgbe_adapter *adapter;
154 struct ixgbe_fcoe *fcoe;
155 struct ixgbe_fcoe_ddp *ddp;
156 struct scatterlist *sg;
157 unsigned int i, j, dmacount;
159 static const unsigned int bufflen = IXGBE_FCBUFF_MIN;
160 unsigned int firstoff = 0;
161 unsigned int lastsize;
162 unsigned int thisoff = 0;
163 unsigned int thislen = 0;
164 u32 fcbuff, fcdmarw, fcfltrw, fcrxctl;
170 adapter = netdev_priv(netdev);
171 if (xid >= IXGBE_FCOE_DDP_MAX) {
172 e_warn(drv, "xid=0x%x out-of-range\n", xid);
176 /* no DDP if we are already down or resetting */
177 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
178 test_bit(__IXGBE_RESETTING, &adapter->state))
181 fcoe = &adapter->fcoe;
183 e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);
187 ddp = &fcoe->ddp[xid];
189 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
190 xid, ddp->sgl, ddp->sgc);
193 ixgbe_fcoe_clear_ddp(ddp);
195 /* setup dma from scsi command sgl */
196 dmacount = pci_map_sg(adapter->pdev, sgl, sgc, DMA_FROM_DEVICE);
198 e_err(drv, "xid 0x%x DMA map error\n", xid);
202 /* alloc the udl from our ddp pool */
203 ddp->udl = pci_pool_alloc(fcoe->pool, GFP_ATOMIC, &ddp->udp);
205 e_err(drv, "failed allocated ddp context\n");
206 goto out_noddp_unmap;
212 for_each_sg(sgl, sg, dmacount, i) {
213 addr = sg_dma_address(sg);
214 len = sg_dma_len(sg);
216 /* max number of buffers allowed in one DDP context */
217 if (j >= IXGBE_BUFFCNT_MAX) {
218 e_err(drv, "xid=%x:%d,%d,%d:addr=%llx "
219 "not enough descriptors\n",
220 xid, i, j, dmacount, (u64)addr);
224 /* get the offset of length of current buffer */
225 thisoff = addr & ((dma_addr_t)bufflen - 1);
226 thislen = min((bufflen - thisoff), len);
228 * all but the 1st buffer (j == 0)
229 * must be aligned on bufflen
231 if ((j != 0) && (thisoff))
234 * all but the last buffer
235 * ((i == (dmacount - 1)) && (thislen == len))
236 * must end at bufflen
238 if (((i != (dmacount - 1)) || (thislen != len))
239 && ((thislen + thisoff) != bufflen))
242 ddp->udl[j] = (u64)(addr - thisoff);
243 /* only the first buffer may have none-zero offset */
251 /* only the last buffer may have non-full bufflen */
252 lastsize = thisoff + thislen;
255 * lastsize can not be buffer len.
256 * If it is then adding another buffer with lastsize = 1.
258 if (lastsize == bufflen) {
259 if (j >= IXGBE_BUFFCNT_MAX) {
260 e_err(drv, "xid=%x:%d,%d,%d:addr=%llx "
261 "not enough user buffers. We need an extra "
262 "buffer because lastsize is bufflen.\n",
263 xid, i, j, dmacount, (u64)addr);
267 ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma);
272 fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT);
273 fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT);
274 fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT);
275 /* Set WRCONTX bit to allow DDP for target */
277 fcbuff |= (IXGBE_FCBUFF_WRCONTX);
278 fcbuff |= (IXGBE_FCBUFF_VALID);
281 fcdmarw |= IXGBE_FCDMARW_WE;
282 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT);
285 fcfltrw |= IXGBE_FCFLTRW_WE;
287 /* program DMA context */
289 spin_lock_bh(&fcoe->lock);
291 /* turn on last frame indication for target mode as FCP_RSPtarget is
292 * supposed to send FCP_RSP when it is done. */
293 if (target_mode && !test_bit(__IXGBE_FCOE_TARGET, &fcoe->mode)) {
294 set_bit(__IXGBE_FCOE_TARGET, &fcoe->mode);
295 fcrxctl = IXGBE_READ_REG(hw, IXGBE_FCRXCTRL);
296 fcrxctl |= IXGBE_FCRXCTRL_LASTSEQH;
297 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, fcrxctl);
300 IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32));
301 IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32);
302 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff);
303 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw);
304 /* program filter context */
305 IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0);
306 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID);
307 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw);
309 spin_unlock_bh(&fcoe->lock);
314 pci_pool_free(fcoe->pool, ddp->udl, ddp->udp);
315 ixgbe_fcoe_clear_ddp(ddp);
318 pci_unmap_sg(adapter->pdev, sgl, sgc, DMA_FROM_DEVICE);
323 * ixgbe_fcoe_ddp_get - called to set up ddp context in initiator mode
324 * @netdev: the corresponding net_device
325 * @xid: the exchange id requesting ddp
326 * @sgl: the scatter-gather list for this request
327 * @sgc: the number of scatter-gather items
329 * This is the implementation of net_device_ops.ndo_fcoe_ddp_setup
330 * and is expected to be called from ULD, e.g., FCP layer of libfc
331 * to set up ddp for the corresponding xid of the given sglist for
332 * the corresponding I/O.
334 * Returns : 1 for success and 0 for no ddp
336 int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
337 struct scatterlist *sgl, unsigned int sgc)
339 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0);
343 * ixgbe_fcoe_ddp_target - called to set up ddp context in target mode
344 * @netdev: the corresponding net_device
345 * @xid: the exchange id requesting ddp
346 * @sgl: the scatter-gather list for this request
347 * @sgc: the number of scatter-gather items
349 * This is the implementation of net_device_ops.ndo_fcoe_ddp_target
350 * and is expected to be called from ULD, e.g., FCP layer of libfc
351 * to set up ddp for the corresponding xid of the given sglist for
352 * the corresponding I/O. The DDP in target mode is a write I/O request
353 * from the initiator.
355 * Returns : 1 for success and 0 for no ddp
357 int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid,
358 struct scatterlist *sgl, unsigned int sgc)
360 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1);
364 * ixgbe_fcoe_ddp - check ddp status and mark it done
365 * @adapter: ixgbe adapter
366 * @rx_desc: advanced rx descriptor
367 * @skb: the skb holding the received data
369 * This checks ddp status.
371 * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates
372 * not passing the skb to ULD, > 0 indicates is the length of data
375 int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
376 union ixgbe_adv_rx_desc *rx_desc,
381 u32 sterr, fceofe, fcerr, fcstat;
383 struct ixgbe_fcoe *fcoe;
384 struct ixgbe_fcoe_ddp *ddp;
385 struct fc_frame_header *fh;
386 struct fcoe_crc_eof *crc;
388 if (!ixgbe_rx_is_fcoe(rx_desc))
391 sterr = le32_to_cpu(rx_desc->wb.upper.status_error);
392 fcerr = (sterr & IXGBE_RXDADV_ERR_FCERR);
393 fceofe = (sterr & IXGBE_RXDADV_ERR_FCEOFE);
394 if (fcerr == IXGBE_FCERR_BADCRC)
395 skb_checksum_none_assert(skb);
397 skb->ip_summed = CHECKSUM_UNNECESSARY;
399 if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
400 fh = (struct fc_frame_header *)(skb->data +
401 sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr));
403 fh = (struct fc_frame_header *)(skb->data +
404 sizeof(struct fcoe_hdr));
405 fctl = ntoh24(fh->fh_f_ctl);
406 if (fctl & FC_FC_EX_CTX)
407 xid = be16_to_cpu(fh->fh_ox_id);
409 xid = be16_to_cpu(fh->fh_rx_id);
411 if (xid >= IXGBE_FCOE_DDP_MAX)
414 fcoe = &adapter->fcoe;
415 ddp = &fcoe->ddp[xid];
419 ddp->err = (fcerr | fceofe);
423 fcstat = (sterr & IXGBE_RXDADV_STAT_FCSTAT);
425 /* update length of DDPed data */
426 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
427 /* unmap the sg list when FCP_RSP is received */
428 if (fcstat == IXGBE_RXDADV_STAT_FCSTAT_FCPRSP) {
429 pci_unmap_sg(adapter->pdev, ddp->sgl,
430 ddp->sgc, DMA_FROM_DEVICE);
434 /* return 0 to bypass going to ULD for DDPed data */
435 if (fcstat == IXGBE_RXDADV_STAT_FCSTAT_DDP)
440 /* In target mode, check the last data frame of the sequence.
441 * For DDP in target mode, data is already DDPed but the header
442 * indication of the last data frame ould allow is to tell if we
443 * got all the data and the ULP can send FCP_RSP back, as this is
444 * not a full fcoe frame, we fill the trailer here so it won't be
445 * dropped by the ULP stack.
447 if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) &&
448 (fctl & FC_FC_END_SEQ)) {
449 crc = (struct fcoe_crc_eof *)skb_put(skb, sizeof(*crc));
450 crc->fcoe_eof = FC_EOF_T;
457 * ixgbe_fso - ixgbe FCoE Sequence Offload (FSO)
458 * @adapter: ixgbe adapter
459 * @tx_ring: tx desc ring
460 * @skb: associated skb
461 * @tx_flags: tx flags
462 * @hdr_len: hdr_len to be returned
464 * This sets up large send offload for FCoE
466 * Returns : 0 indicates no FSO, > 0 for FSO, < 0 for error
468 int ixgbe_fso(struct ixgbe_adapter *adapter,
469 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
470 u32 tx_flags, u8 *hdr_len)
479 struct ixgbe_tx_buffer *tx_buffer_info;
480 struct ixgbe_adv_tx_context_desc *context_desc;
481 struct fc_frame_header *fh;
483 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) {
484 e_err(drv, "Wrong gso type %d:expecting SKB_GSO_FCOE\n",
485 skb_shinfo(skb)->gso_type);
489 /* resets the header to point fcoe/fc */
490 skb_set_network_header(skb, skb->mac_len);
491 skb_set_transport_header(skb, skb->mac_len +
492 sizeof(struct fcoe_hdr));
494 /* sets up SOF and ORIS */
496 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof;
499 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_ORIS;
502 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_SOF;
503 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_ORIS;
508 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_SOF;
511 e_warn(drv, "unknown sof = 0x%x\n", sof);
515 /* the first byte of the last dword is EOF */
516 skb_copy_bits(skb, skb->len - 4, &eof, 1);
517 /* sets up EOF and ORIE */
520 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
524 if (skb_is_gso(skb)) {
525 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
526 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_ORIE;
528 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T;
532 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI;
535 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A;
538 e_warn(drv, "unknown eof = 0x%x\n", eof);
542 /* sets up PARINC indicating data offset */
543 fh = (struct fc_frame_header *)skb_transport_header(skb);
544 if (fh->fh_f_ctl[2] & FC_FC_REL_OFF)
545 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC;
547 /* hdr_len includes fc_hdr if FCoE lso is enabled */
548 *hdr_len = sizeof(struct fcoe_crc_eof);
550 *hdr_len += (skb_transport_offset(skb) +
551 sizeof(struct fc_frame_header));
552 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
553 vlan_macip_lens = (skb_transport_offset(skb) +
554 sizeof(struct fc_frame_header));
555 vlan_macip_lens |= ((skb_transport_offset(skb) - 4)
556 << IXGBE_ADVTXD_MACLEN_SHIFT);
557 vlan_macip_lens |= (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
559 /* type_tycmd and mss: set TUCMD.FCoE to enable offload */
560 type_tucmd = IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT |
561 IXGBE_ADVTXT_TUCMD_FCOE;
563 mss = skb_shinfo(skb)->gso_size;
564 /* mss_l4len_id: use 1 for FSO as TSO, no need for L4LEN */
565 mss_l4len_idx = (mss << IXGBE_ADVTXD_MSS_SHIFT) |
566 (1 << IXGBE_ADVTXD_IDX_SHIFT);
568 /* write context desc */
569 i = tx_ring->next_to_use;
570 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
571 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
572 context_desc->seqnum_seed = cpu_to_le32(fcoe_sof_eof);
573 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
574 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
576 tx_buffer_info = &tx_ring->tx_buffer_info[i];
577 tx_buffer_info->time_stamp = jiffies;
578 tx_buffer_info->next_to_watch = i;
581 if (i == tx_ring->count)
583 tx_ring->next_to_use = i;
585 return skb_is_gso(skb);
589 * ixgbe_configure_fcoe - configures registers for fcoe at start
590 * @adapter: ptr to ixgbe adapter
592 * This sets up FCoE related registers
596 void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
598 int i, fcoe_q, fcoe_i;
599 struct ixgbe_hw *hw = &adapter->hw;
600 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
601 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
602 #ifdef CONFIG_IXGBE_DCB
607 /* create the pool for ddp if not created yet */
609 /* allocate ddp pool */
610 fcoe->pool = pci_pool_create("ixgbe_fcoe_ddp",
611 adapter->pdev, IXGBE_FCPTR_MAX,
612 IXGBE_FCPTR_ALIGN, PAGE_SIZE);
614 e_err(drv, "failed to allocated FCoE DDP pool\n");
616 spin_lock_init(&fcoe->lock);
618 /* Extra buffer to be shared by all DDPs for HW work around */
619 fcoe->extra_ddp_buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_ATOMIC);
620 if (fcoe->extra_ddp_buffer == NULL) {
621 e_err(drv, "failed to allocated extra DDP buffer\n");
622 goto out_extra_ddp_buffer_alloc;
625 fcoe->extra_ddp_buffer_dma =
626 dma_map_single(&adapter->pdev->dev,
627 fcoe->extra_ddp_buffer,
630 if (dma_mapping_error(&adapter->pdev->dev,
631 fcoe->extra_ddp_buffer_dma)) {
632 e_err(drv, "failed to map extra DDP buffer\n");
633 goto out_extra_ddp_buffer_dma;
637 /* Enable L2 eth type filter for FCoE */
638 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE),
639 (ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN));
640 /* Enable L2 eth type filter for FIP */
641 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP),
642 (ETH_P_FIP | IXGBE_ETQF_FILTER_EN));
643 if (adapter->ring_feature[RING_F_FCOE].indices) {
644 /* Use multiple rx queues for FCoE by redirection table */
645 for (i = 0; i < IXGBE_FCRETA_SIZE; i++) {
646 fcoe_i = f->mask + i % f->indices;
647 fcoe_i &= IXGBE_FCRETA_ENTRY_MASK;
648 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
649 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
651 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA);
652 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0);
654 /* Use single rx queue for FCoE */
656 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
657 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, 0);
658 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE),
659 IXGBE_ETQS_QUEUE_EN |
660 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
662 /* send FIP frames to the first FCoE queue */
664 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
665 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP),
666 IXGBE_ETQS_QUEUE_EN |
667 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
669 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
670 IXGBE_FCRXCTRL_FCOELLI |
671 IXGBE_FCRXCTRL_FCCRCBO |
672 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
673 #ifdef CONFIG_IXGBE_DCB
674 up2tc = IXGBE_READ_REG(&adapter->hw, IXGBE_RTTUP2TC);
675 for (i = 0; i < MAX_USER_PRIORITY; i++) {
676 tc = (u8)(up2tc >> (i * IXGBE_RTTUP2TC_UP_SHIFT));
677 tc &= (MAX_TRAFFIC_CLASS - 1);
678 if (fcoe->tc == tc) {
687 out_extra_ddp_buffer_dma:
688 kfree(fcoe->extra_ddp_buffer);
689 out_extra_ddp_buffer_alloc:
690 pci_pool_destroy(fcoe->pool);
695 * ixgbe_cleanup_fcoe - release all fcoe ddp context resources
696 * @adapter : ixgbe adapter
698 * Cleans up outstanding ddp context resources
702 void ixgbe_cleanup_fcoe(struct ixgbe_adapter *adapter)
705 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
707 /* release ddp resource */
709 for (i = 0; i < IXGBE_FCOE_DDP_MAX; i++)
710 ixgbe_fcoe_ddp_put(adapter->netdev, i);
711 dma_unmap_single(&adapter->pdev->dev,
712 fcoe->extra_ddp_buffer_dma,
715 kfree(fcoe->extra_ddp_buffer);
716 pci_pool_destroy(fcoe->pool);
722 * ixgbe_fcoe_enable - turn on FCoE offload feature
723 * @netdev: the corresponding netdev
725 * Turns on FCoE offload feature in 82599.
727 * Returns : 0 indicates success or -EINVAL on failure
729 int ixgbe_fcoe_enable(struct net_device *netdev)
732 struct ixgbe_adapter *adapter = netdev_priv(netdev);
733 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
736 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
739 atomic_inc(&fcoe->refcnt);
740 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
743 e_info(drv, "Enabling FCoE offload features.\n");
744 if (netif_running(netdev))
745 netdev->netdev_ops->ndo_stop(netdev);
747 ixgbe_clear_interrupt_scheme(adapter);
749 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
750 adapter->ring_feature[RING_F_FCOE].indices = IXGBE_FCRETA_SIZE;
751 netdev->features |= NETIF_F_FCOE_CRC;
752 netdev->features |= NETIF_F_FSO;
753 netdev->features |= NETIF_F_FCOE_MTU;
754 netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
756 ixgbe_init_interrupt_scheme(adapter);
757 netdev_features_change(netdev);
759 if (netif_running(netdev))
760 netdev->netdev_ops->ndo_open(netdev);
768 * ixgbe_fcoe_disable - turn off FCoE offload feature
769 * @netdev: the corresponding netdev
771 * Turns off FCoE offload feature in 82599.
773 * Returns : 0 indicates success or -EINVAL on failure
775 int ixgbe_fcoe_disable(struct net_device *netdev)
778 struct ixgbe_adapter *adapter = netdev_priv(netdev);
779 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
781 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
784 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
787 if (!atomic_dec_and_test(&fcoe->refcnt))
790 e_info(drv, "Disabling FCoE offload features.\n");
791 netdev->features &= ~NETIF_F_FCOE_CRC;
792 netdev->features &= ~NETIF_F_FSO;
793 netdev->features &= ~NETIF_F_FCOE_MTU;
794 netdev->fcoe_ddp_xid = 0;
795 netdev_features_change(netdev);
797 if (netif_running(netdev))
798 netdev->netdev_ops->ndo_stop(netdev);
800 ixgbe_clear_interrupt_scheme(adapter);
801 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
802 adapter->ring_feature[RING_F_FCOE].indices = 0;
803 ixgbe_cleanup_fcoe(adapter);
804 ixgbe_init_interrupt_scheme(adapter);
806 if (netif_running(netdev))
807 netdev->netdev_ops->ndo_open(netdev);
814 #ifdef CONFIG_IXGBE_DCB
816 * ixgbe_fcoe_getapp - retrieves current user priority bitmap for FCoE
817 * @adapter : ixgbe adapter
819 * Finds out the corresponding user priority bitmap from the current
820 * traffic class that FCoE belongs to. Returns 0 as the invalid user
821 * priority bitmap to indicate an error.
823 * Returns : 802.1p user priority bitmap for FCoE
825 u8 ixgbe_fcoe_getapp(struct ixgbe_adapter *adapter)
827 return 1 << adapter->fcoe.up;
831 * ixgbe_fcoe_setapp - sets the user priority bitmap for FCoE
832 * @adapter : ixgbe adapter
833 * @up : 802.1p user priority bitmap
835 * Finds out the traffic class from the input user priority
838 * Returns : 0 on success otherwise returns 1 on error
840 u8 ixgbe_fcoe_setapp(struct ixgbe_adapter *adapter, u8 up)
845 /* valid user priority bitmap must not be 0 */
847 /* from user priority to the corresponding traffic class */
848 up2tc = IXGBE_READ_REG(&adapter->hw, IXGBE_RTTUP2TC);
849 for (i = 0; i < MAX_USER_PRIORITY; i++) {
851 up2tc >>= (i * IXGBE_RTTUP2TC_UP_SHIFT);
852 up2tc &= (MAX_TRAFFIC_CLASS - 1);
853 adapter->fcoe.tc = (u8)up2tc;
854 adapter->fcoe.up = i;
862 #endif /* CONFIG_IXGBE_DCB */
865 * ixgbe_fcoe_get_wwn - get world wide name for the node or the port
866 * @netdev : ixgbe adapter
867 * @wwn : the world wide name
868 * @type: the type of world wide name
870 * Returns the node or port world wide name if both the prefix and the san
871 * mac address are valid, then the wwn is formed based on the NAA-2 for
872 * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3).
874 * Returns : 0 on success
876 int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
880 struct ixgbe_adapter *adapter = netdev_priv(netdev);
881 struct ixgbe_mac_info *mac = &adapter->hw.mac;
884 case NETDEV_FCOE_WWNN:
885 prefix = mac->wwnn_prefix;
887 case NETDEV_FCOE_WWPN:
888 prefix = mac->wwpn_prefix;
894 if ((prefix != 0xffff) &&
895 is_valid_ether_addr(mac->san_addr)) {
896 *wwn = ((u64) prefix << 48) |
897 ((u64) mac->san_addr[0] << 40) |
898 ((u64) mac->san_addr[1] << 32) |
899 ((u64) mac->san_addr[2] << 24) |
900 ((u64) mac->san_addr[3] << 16) |
901 ((u64) mac->san_addr[4] << 8) |
902 ((u64) mac->san_addr[5]);