1 /*******************************************************************************
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2014 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 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <linux/if_ether.h>
31 #include <linux/gfp.h>
32 #include <linux/if_vlan.h>
33 #include <scsi/scsi_cmnd.h>
34 #include <scsi/scsi_device.h>
35 #include <scsi/fc/fc_fs.h>
36 #include <scsi/fc/fc_fcoe.h>
37 #include <scsi/libfc.h>
38 #include <scsi/libfcoe.h>
41 * ixgbe_fcoe_clear_ddp - clear the given ddp context
42 * @ddp: ptr to the ixgbe_fcoe_ddp
47 static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp)
58 * ixgbe_fcoe_ddp_put - free the ddp context for a given xid
59 * @netdev: the corresponding net_device
60 * @xid: the xid that corresponding ddp will be freed
62 * This is the implementation of net_device_ops.ndo_fcoe_ddp_done
63 * and it is expected to be called by ULD, i.e., FCP layer of libfc
64 * to release the corresponding ddp context when the I/O is done.
66 * Returns : data length already ddp-ed in bytes
68 int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
71 struct ixgbe_fcoe *fcoe;
72 struct ixgbe_adapter *adapter;
73 struct ixgbe_fcoe_ddp *ddp;
80 if (xid >= netdev->fcoe_ddp_xid)
83 adapter = netdev_priv(netdev);
84 fcoe = &adapter->fcoe;
85 ddp = &fcoe->ddp[xid];
91 /* if no error then skip ddp context invalidation */
95 if (hw->mac.type == ixgbe_mac_X550) {
96 /* X550 does not require DDP FCoE lock */
98 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), 0);
99 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid),
100 (xid | IXGBE_FCFLTRW_WE));
103 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), 0);
105 /* program FCDMARW */
106 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
107 (xid | IXGBE_FCDMARW_WE));
109 /* read FCBUFF to check context invalidated */
110 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
111 (xid | IXGBE_FCDMARW_RE));
112 fcbuff = IXGBE_READ_REG(hw, IXGBE_FCDDC(2, xid));
114 /* other hardware requires DDP FCoE lock */
115 spin_lock_bh(&fcoe->lock);
116 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, 0);
117 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW,
118 (xid | IXGBE_FCFLTRW_WE));
119 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, 0);
120 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW,
121 (xid | IXGBE_FCDMARW_WE));
123 /* guaranteed to be invalidated after 100us */
124 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW,
125 (xid | IXGBE_FCDMARW_RE));
126 fcbuff = IXGBE_READ_REG(hw, IXGBE_FCBUFF);
127 spin_unlock_bh(&fcoe->lock);
130 if (fcbuff & IXGBE_FCBUFF_VALID)
131 usleep_range(100, 150);
135 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc,
138 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
142 ixgbe_fcoe_clear_ddp(ddp);
148 * ixgbe_fcoe_ddp_setup - called to set up ddp context
149 * @netdev: the corresponding net_device
150 * @xid: the exchange id requesting ddp
151 * @sgl: the scatter-gather list for this request
152 * @sgc: the number of scatter-gather items
153 * @target_mode: 1 to setup target mode, 0 to setup initiator mode
155 * Returns : 1 for success and 0 for no ddp
157 static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
158 struct scatterlist *sgl, unsigned int sgc,
161 struct ixgbe_adapter *adapter;
163 struct ixgbe_fcoe *fcoe;
164 struct ixgbe_fcoe_ddp *ddp;
165 struct ixgbe_fcoe_ddp_pool *ddp_pool;
166 struct scatterlist *sg;
167 unsigned int i, j, dmacount;
169 static const unsigned int bufflen = IXGBE_FCBUFF_MIN;
170 unsigned int firstoff = 0;
171 unsigned int lastsize;
172 unsigned int thisoff = 0;
173 unsigned int thislen = 0;
174 u32 fcbuff, fcdmarw, fcfltrw, fcrxctl;
180 adapter = netdev_priv(netdev);
181 if (xid >= netdev->fcoe_ddp_xid) {
182 e_warn(drv, "xid=0x%x out-of-range\n", xid);
186 /* no DDP if we are already down or resetting */
187 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
188 test_bit(__IXGBE_RESETTING, &adapter->state))
191 fcoe = &adapter->fcoe;
192 ddp = &fcoe->ddp[xid];
194 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
195 xid, ddp->sgl, ddp->sgc);
198 ixgbe_fcoe_clear_ddp(ddp);
201 if (!fcoe->ddp_pool) {
202 e_warn(drv, "No ddp_pool resources allocated\n");
206 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, get_cpu());
207 if (!ddp_pool->pool) {
208 e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);
212 /* setup dma from scsi command sgl */
213 dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
215 e_err(drv, "xid 0x%x DMA map error\n", xid);
219 /* alloc the udl from per cpu ddp pool */
220 ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp);
222 e_err(drv, "failed allocated ddp context\n");
223 goto out_noddp_unmap;
225 ddp->pool = ddp_pool->pool;
230 for_each_sg(sgl, sg, dmacount, i) {
231 addr = sg_dma_address(sg);
232 len = sg_dma_len(sg);
234 /* max number of buffers allowed in one DDP context */
235 if (j >= IXGBE_BUFFCNT_MAX) {
240 /* get the offset of length of current buffer */
241 thisoff = addr & ((dma_addr_t)bufflen - 1);
242 thislen = min((bufflen - thisoff), len);
244 * all but the 1st buffer (j == 0)
245 * must be aligned on bufflen
247 if ((j != 0) && (thisoff))
250 * all but the last buffer
251 * ((i == (dmacount - 1)) && (thislen == len))
252 * must end at bufflen
254 if (((i != (dmacount - 1)) || (thislen != len))
255 && ((thislen + thisoff) != bufflen))
258 ddp->udl[j] = (u64)(addr - thisoff);
259 /* only the first buffer may have none-zero offset */
267 /* only the last buffer may have non-full bufflen */
268 lastsize = thisoff + thislen;
271 * lastsize can not be buffer len.
272 * If it is then adding another buffer with lastsize = 1.
274 if (lastsize == bufflen) {
275 if (j >= IXGBE_BUFFCNT_MAX) {
276 ddp_pool->noddp_ext_buff++;
280 ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma);
286 fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT);
287 fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT);
288 fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT);
289 /* Set WRCONTX bit to allow DDP for target */
291 fcbuff |= (IXGBE_FCBUFF_WRCONTX);
292 fcbuff |= (IXGBE_FCBUFF_VALID);
295 fcdmarw |= IXGBE_FCDMARW_WE;
296 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT);
299 fcfltrw |= IXGBE_FCFLTRW_WE;
301 /* program DMA context */
304 /* turn on last frame indication for target mode as FCP_RSPtarget is
305 * supposed to send FCP_RSP when it is done. */
306 if (target_mode && !test_bit(__IXGBE_FCOE_TARGET, &fcoe->mode)) {
307 set_bit(__IXGBE_FCOE_TARGET, &fcoe->mode);
308 fcrxctl = IXGBE_READ_REG(hw, IXGBE_FCRXCTRL);
309 fcrxctl |= IXGBE_FCRXCTRL_LASTSEQH;
310 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, fcrxctl);
313 if (hw->mac.type == ixgbe_mac_X550) {
314 /* X550 does not require DDP lock */
316 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(0, xid),
317 ddp->udp & DMA_BIT_MASK(32));
318 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(1, xid), (u64)ddp->udp >> 32);
319 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), fcbuff);
320 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), fcdmarw);
321 /* program filter context */
322 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), IXGBE_FCFLT_VALID);
323 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(1, xid), 0);
324 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid), fcfltrw);
326 /* DDP lock for indirect DDP context access */
327 spin_lock_bh(&fcoe->lock);
329 IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32));
330 IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32);
331 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff);
332 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw);
333 /* program filter context */
334 IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0);
335 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID);
336 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw);
338 spin_unlock_bh(&fcoe->lock);
344 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
345 ixgbe_fcoe_clear_ddp(ddp);
348 dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
355 * ixgbe_fcoe_ddp_get - called to set up ddp context in initiator mode
356 * @netdev: the corresponding net_device
357 * @xid: the exchange id requesting ddp
358 * @sgl: the scatter-gather list for this request
359 * @sgc: the number of scatter-gather items
361 * This is the implementation of net_device_ops.ndo_fcoe_ddp_setup
362 * and is expected to be called from ULD, e.g., FCP layer of libfc
363 * to set up ddp for the corresponding xid of the given sglist for
364 * the corresponding I/O.
366 * Returns : 1 for success and 0 for no ddp
368 int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
369 struct scatterlist *sgl, unsigned int sgc)
371 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0);
375 * ixgbe_fcoe_ddp_target - called to set up ddp context in target mode
376 * @netdev: the corresponding net_device
377 * @xid: the exchange id requesting ddp
378 * @sgl: the scatter-gather list for this request
379 * @sgc: the number of scatter-gather items
381 * This is the implementation of net_device_ops.ndo_fcoe_ddp_target
382 * and is expected to be called from ULD, e.g., FCP layer of libfc
383 * to set up ddp for the corresponding xid of the given sglist for
384 * the corresponding I/O. The DDP in target mode is a write I/O request
385 * from the initiator.
387 * Returns : 1 for success and 0 for no ddp
389 int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid,
390 struct scatterlist *sgl, unsigned int sgc)
392 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1);
396 * ixgbe_fcoe_ddp - check ddp status and mark it done
397 * @adapter: ixgbe adapter
398 * @rx_desc: advanced rx descriptor
399 * @skb: the skb holding the received data
401 * This checks ddp status.
403 * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates
404 * not passing the skb to ULD, > 0 indicates is the length of data
407 int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
408 union ixgbe_adv_rx_desc *rx_desc,
412 struct ixgbe_fcoe *fcoe;
413 struct ixgbe_fcoe_ddp *ddp;
414 struct fc_frame_header *fh;
415 struct fcoe_crc_eof *crc;
416 __le32 fcerr = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCERR);
422 if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC))
423 skb->ip_summed = CHECKSUM_NONE;
425 skb->ip_summed = CHECKSUM_UNNECESSARY;
427 if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
428 fh = (struct fc_frame_header *)(skb->data +
429 sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr));
431 fh = (struct fc_frame_header *)(skb->data +
432 sizeof(struct fcoe_hdr));
434 fctl = ntoh24(fh->fh_f_ctl);
435 if (fctl & FC_FC_EX_CTX)
436 xid = be16_to_cpu(fh->fh_ox_id);
438 xid = be16_to_cpu(fh->fh_rx_id);
440 ddp_max = IXGBE_FCOE_DDP_MAX;
441 /* X550 has different DDP Max limit */
442 if (adapter->hw.mac.type == ixgbe_mac_X550)
443 ddp_max = IXGBE_FCOE_DDP_MAX_X550;
447 fcoe = &adapter->fcoe;
448 ddp = &fcoe->ddp[xid];
452 ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE |
453 IXGBE_RXDADV_ERR_FCERR);
457 switch (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_FCSTAT)) {
458 /* return 0 to bypass going to ULD for DDPed data */
459 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_DDP):
460 /* update length of DDPed data */
461 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
464 /* unmap the sg list when FCPRSP is received */
465 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_FCPRSP):
466 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl,
467 ddp->sgc, DMA_FROM_DEVICE);
472 /* if DDP length is present pass it through to ULD */
473 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NODDP):
474 /* update length of DDPed data */
475 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
479 /* no match will return as an error */
480 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH):
485 /* In target mode, check the last data frame of the sequence.
486 * For DDP in target mode, data is already DDPed but the header
487 * indication of the last data frame ould allow is to tell if we
488 * got all the data and the ULP can send FCP_RSP back, as this is
489 * not a full fcoe frame, we fill the trailer here so it won't be
490 * dropped by the ULP stack.
492 if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) &&
493 (fctl & FC_FC_END_SEQ)) {
495 crc = skb_put(skb, sizeof(*crc));
496 crc->fcoe_eof = FC_EOF_T;
503 * ixgbe_fso - ixgbe FCoE Sequence Offload (FSO)
504 * @tx_ring: tx desc ring
505 * @first: first tx_buffer structure containing skb, tx_flags, and protocol
506 * @hdr_len: hdr_len to be returned
508 * This sets up large send offload for FCoE
510 * Returns : 0 indicates success, < 0 for error
512 int ixgbe_fso(struct ixgbe_ring *tx_ring,
513 struct ixgbe_tx_buffer *first,
516 struct sk_buff *skb = first->skb;
517 struct fc_frame_header *fh;
519 u32 fcoe_sof_eof = 0;
521 u32 type_tucmd = IXGBE_ADVTXT_TUCMD_FCOE;
524 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) {
525 dev_err(tx_ring->dev, "Wrong gso type %d:expecting SKB_GSO_FCOE\n",
526 skb_shinfo(skb)->gso_type);
530 /* resets the header to point fcoe/fc */
531 skb_set_network_header(skb, skb->mac_len);
532 skb_set_transport_header(skb, skb->mac_len +
533 sizeof(struct fcoe_hdr));
535 /* sets up SOF and ORIS */
536 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof;
539 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS;
542 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF |
543 IXGBE_ADVTXD_FCOEF_ORIS;
548 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF;
551 dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof);
555 /* the first byte of the last dword is EOF */
556 skb_copy_bits(skb, skb->len - 4, &eof, 1);
557 /* sets up EOF and ORIE */
560 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
565 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N |
566 IXGBE_ADVTXD_FCOEF_ORIE;
568 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T;
571 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI;
574 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A;
577 dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof);
581 /* sets up PARINC indicating data offset */
582 fh = (struct fc_frame_header *)skb_transport_header(skb);
583 if (fh->fh_f_ctl[2] & FC_FC_REL_OFF)
584 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC;
586 /* include trailer in headlen as it is replicated per frame */
587 *hdr_len = sizeof(struct fcoe_crc_eof);
589 /* hdr_len includes fc_hdr if FCoE LSO is enabled */
590 if (skb_is_gso(skb)) {
591 *hdr_len += skb_transport_offset(skb) +
592 sizeof(struct fc_frame_header);
593 /* update gso_segs and bytecount */
594 first->gso_segs = DIV_ROUND_UP(skb->len - *hdr_len,
595 skb_shinfo(skb)->gso_size);
596 first->bytecount += (first->gso_segs - 1) * *hdr_len;
597 first->tx_flags |= IXGBE_TX_FLAGS_TSO;
598 /* Hardware expects L4T to be RSV for FCoE TSO */
599 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_RSV;
602 /* set flag indicating FCOE to ixgbe_tx_map call */
603 first->tx_flags |= IXGBE_TX_FLAGS_FCOE | IXGBE_TX_FLAGS_CC;
605 /* mss_l4len_id: use 0 for FSO as TSO, no need for L4LEN */
606 mss_l4len_idx = skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
608 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
609 vlan_macip_lens = skb_transport_offset(skb) +
610 sizeof(struct fc_frame_header);
611 vlan_macip_lens |= (skb_transport_offset(skb) - 4)
612 << IXGBE_ADVTXD_MACLEN_SHIFT;
613 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
615 /* write context desc */
616 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof,
617 type_tucmd, mss_l4len_idx);
622 static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu)
624 struct ixgbe_fcoe_ddp_pool *ddp_pool;
626 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
627 dma_pool_destroy(ddp_pool->pool);
628 ddp_pool->pool = NULL;
631 static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe,
635 struct ixgbe_fcoe_ddp_pool *ddp_pool;
636 struct dma_pool *pool;
639 snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%u", cpu);
641 pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX,
642 IXGBE_FCPTR_ALIGN, PAGE_SIZE);
646 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
647 ddp_pool->pool = pool;
649 ddp_pool->noddp_ext_buff = 0;
655 * ixgbe_configure_fcoe - configures registers for fcoe at start
656 * @adapter: ptr to ixgbe adapter
658 * This sets up FCoE related registers
662 void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
664 struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE];
665 struct ixgbe_hw *hw = &adapter->hw;
666 int i, fcoe_q, fcoe_i, fcoe_q_h = 0;
670 /* Minimal functionality for FCoE requires at least CRC offloads */
671 if (!(adapter->netdev->features & NETIF_F_FCOE_CRC))
674 /* Enable L2 EtherType filter for FCoE, needed for FCoE CRC and DDP */
675 etqf = ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN;
676 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
677 etqf |= IXGBE_ETQF_POOL_ENABLE;
678 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT;
680 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf);
681 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0);
683 /* leave registers un-configured if FCoE is disabled */
684 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
687 /* Use one or more Rx queues for FCoE by redirection table */
688 fcreta_size = IXGBE_FCRETA_SIZE;
689 if (adapter->hw.mac.type == ixgbe_mac_X550)
690 fcreta_size = IXGBE_FCRETA_SIZE_X550;
692 for (i = 0; i < fcreta_size; i++) {
693 if (adapter->hw.mac.type == ixgbe_mac_X550) {
694 int fcoe_i_h = fcoe->offset + ((i + fcreta_size) %
696 fcoe_q_h = adapter->rx_ring[fcoe_i_h]->reg_idx;
697 fcoe_q_h = (fcoe_q_h << IXGBE_FCRETA_ENTRY_HIGH_SHIFT) &
698 IXGBE_FCRETA_ENTRY_HIGH_MASK;
701 fcoe_i = fcoe->offset + (i % fcoe->indices);
702 fcoe_i &= IXGBE_FCRETA_ENTRY_MASK;
703 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
705 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
707 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA);
709 /* Enable L2 EtherType filter for FIP */
710 etqf = ETH_P_FIP | IXGBE_ETQF_FILTER_EN;
711 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
712 etqf |= IXGBE_ETQF_POOL_ENABLE;
713 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT;
715 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf);
717 /* Send FIP frames to the first FCoE queue */
718 fcoe_q = adapter->rx_ring[fcoe->offset]->reg_idx;
719 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP),
720 IXGBE_ETQS_QUEUE_EN |
721 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
723 /* Configure FCoE Rx control */
724 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
725 IXGBE_FCRXCTRL_FCCRCBO |
726 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
730 * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources
731 * @adapter : ixgbe adapter
733 * Cleans up outstanding ddp context resources
737 void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
739 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
742 /* do nothing if no DDP pools were allocated */
746 ddp_max = IXGBE_FCOE_DDP_MAX;
747 /* X550 has different DDP Max limit */
748 if (adapter->hw.mac.type == ixgbe_mac_X550)
749 ddp_max = IXGBE_FCOE_DDP_MAX_X550;
751 for (i = 0; i < ddp_max; i++)
752 ixgbe_fcoe_ddp_put(adapter->netdev, i);
754 for_each_possible_cpu(cpu)
755 ixgbe_fcoe_dma_pool_free(fcoe, cpu);
757 dma_unmap_single(&adapter->pdev->dev,
758 fcoe->extra_ddp_buffer_dma,
761 kfree(fcoe->extra_ddp_buffer);
763 fcoe->extra_ddp_buffer = NULL;
764 fcoe->extra_ddp_buffer_dma = 0;
768 * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources
769 * @adapter: ixgbe adapter
771 * Sets up ddp context resouces
773 * Returns : 0 indicates success or -EINVAL on failure
775 int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
777 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
778 struct device *dev = &adapter->pdev->dev;
783 /* do nothing if no DDP pools were allocated */
787 /* Extra buffer to be shared by all DDPs for HW work around */
788 buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_ATOMIC);
792 dma = dma_map_single(dev, buffer, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE);
793 if (dma_mapping_error(dev, dma)) {
794 e_err(drv, "failed to map extra DDP buffer\n");
799 fcoe->extra_ddp_buffer = buffer;
800 fcoe->extra_ddp_buffer_dma = dma;
802 /* allocate pci pool for each cpu */
803 for_each_possible_cpu(cpu) {
804 int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu);
808 e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu);
809 ixgbe_free_fcoe_ddp_resources(adapter);
816 static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter)
818 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
820 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
823 fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool);
825 if (!fcoe->ddp_pool) {
826 e_err(drv, "failed to allocate percpu DDP resources\n");
830 adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
831 /* X550 has different DDP Max limit */
832 if (adapter->hw.mac.type == ixgbe_mac_X550)
833 adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX_X550 - 1;
838 static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter)
840 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
842 adapter->netdev->fcoe_ddp_xid = 0;
847 free_percpu(fcoe->ddp_pool);
848 fcoe->ddp_pool = NULL;
852 * ixgbe_fcoe_enable - turn on FCoE offload feature
853 * @netdev: the corresponding netdev
855 * Turns on FCoE offload feature in 82599.
857 * Returns : 0 indicates success or -EINVAL on failure
859 int ixgbe_fcoe_enable(struct net_device *netdev)
861 struct ixgbe_adapter *adapter = netdev_priv(netdev);
862 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
864 atomic_inc(&fcoe->refcnt);
866 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
869 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
872 e_info(drv, "Enabling FCoE offload features.\n");
874 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
875 e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n");
877 if (netif_running(netdev))
878 netdev->netdev_ops->ndo_stop(netdev);
880 /* Allocate per CPU memory to track DDP pools */
881 ixgbe_fcoe_ddp_enable(adapter);
883 /* enable FCoE and notify stack */
884 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
885 netdev->features |= NETIF_F_FCOE_MTU;
886 netdev_features_change(netdev);
888 /* release existing queues and reallocate them */
889 ixgbe_clear_interrupt_scheme(adapter);
890 ixgbe_init_interrupt_scheme(adapter);
892 if (netif_running(netdev))
893 netdev->netdev_ops->ndo_open(netdev);
899 * ixgbe_fcoe_disable - turn off FCoE offload feature
900 * @netdev: the corresponding netdev
902 * Turns off FCoE offload feature in 82599.
904 * Returns : 0 indicates success or -EINVAL on failure
906 int ixgbe_fcoe_disable(struct net_device *netdev)
908 struct ixgbe_adapter *adapter = netdev_priv(netdev);
910 if (!atomic_dec_and_test(&adapter->fcoe.refcnt))
913 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
916 e_info(drv, "Disabling FCoE offload features.\n");
917 if (netif_running(netdev))
918 netdev->netdev_ops->ndo_stop(netdev);
920 /* Free per CPU memory to track DDP pools */
921 ixgbe_fcoe_ddp_disable(adapter);
923 /* disable FCoE and notify stack */
924 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
925 netdev->features &= ~NETIF_F_FCOE_MTU;
927 netdev_features_change(netdev);
929 /* release existing queues and reallocate them */
930 ixgbe_clear_interrupt_scheme(adapter);
931 ixgbe_init_interrupt_scheme(adapter);
933 if (netif_running(netdev))
934 netdev->netdev_ops->ndo_open(netdev);
940 * ixgbe_fcoe_get_wwn - get world wide name for the node or the port
941 * @netdev : ixgbe adapter
942 * @wwn : the world wide name
943 * @type: the type of world wide name
945 * Returns the node or port world wide name if both the prefix and the san
946 * mac address are valid, then the wwn is formed based on the NAA-2 for
947 * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3).
949 * Returns : 0 on success
951 int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
954 struct ixgbe_adapter *adapter = netdev_priv(netdev);
955 struct ixgbe_mac_info *mac = &adapter->hw.mac;
958 case NETDEV_FCOE_WWNN:
959 prefix = mac->wwnn_prefix;
961 case NETDEV_FCOE_WWPN:
962 prefix = mac->wwpn_prefix;
968 if ((prefix != 0xffff) &&
969 is_valid_ether_addr(mac->san_addr)) {
970 *wwn = ((u64) prefix << 48) |
971 ((u64) mac->san_addr[0] << 40) |
972 ((u64) mac->san_addr[1] << 32) |
973 ((u64) mac->san_addr[2] << 24) |
974 ((u64) mac->san_addr[3] << 16) |
975 ((u64) mac->san_addr[4] << 8) |
976 ((u64) mac->san_addr[5]);
983 * ixgbe_fcoe_get_hbainfo - get FCoE HBA information
984 * @netdev : ixgbe adapter
985 * @info : HBA information
987 * Returns ixgbe HBA information
989 * Returns : 0 on success
991 int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
992 struct netdev_fcoe_hbainfo *info)
994 struct ixgbe_adapter *adapter = netdev_priv(netdev);
995 struct ixgbe_hw *hw = &adapter->hw;
1002 /* Don't return information on unsupported devices */
1003 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
1007 snprintf(info->manufacturer, sizeof(info->manufacturer),
1008 "Intel Corporation");
1012 /* Get the PCI-e Device Serial Number Capability */
1013 pos = pci_find_ext_capability(adapter->pdev, PCI_EXT_CAP_ID_DSN);
1016 for (i = 0; i < 8; i++)
1017 pci_read_config_byte(adapter->pdev, pos + i, &buf[i]);
1019 snprintf(info->serial_number, sizeof(info->serial_number),
1020 "%02X%02X%02X%02X%02X%02X%02X%02X",
1021 buf[7], buf[6], buf[5], buf[4],
1022 buf[3], buf[2], buf[1], buf[0]);
1024 snprintf(info->serial_number, sizeof(info->serial_number),
1027 /* Hardware Version */
1028 snprintf(info->hardware_version,
1029 sizeof(info->hardware_version),
1030 "Rev %d", hw->revision_id);
1031 /* Driver Name/Version */
1032 snprintf(info->driver_version,
1033 sizeof(info->driver_version),
1036 ixgbe_driver_version);
1037 /* Firmware Version */
1038 strlcpy(info->firmware_version, adapter->eeprom_id,
1039 sizeof(info->firmware_version));
1042 if (hw->mac.type == ixgbe_mac_82599EB) {
1043 snprintf(info->model,
1044 sizeof(info->model),
1046 } else if (hw->mac.type == ixgbe_mac_X550) {
1047 snprintf(info->model,
1048 sizeof(info->model),
1051 snprintf(info->model,
1052 sizeof(info->model),
1056 /* Model Description */
1057 snprintf(info->model_description,
1058 sizeof(info->model_description),
1060 ixgbe_default_device_descr);
1066 * ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to
1067 * @adapter: pointer to the device adapter structure
1069 * Return : TC that FCoE is mapped to
1071 u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter)
1073 #ifdef CONFIG_IXGBE_DCB
1074 return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up);