1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
5 #include <linux/if_ether.h>
7 #include <linux/if_vlan.h>
8 #include <generated/utsrelease.h>
9 #include <scsi/scsi_cmnd.h>
10 #include <scsi/scsi_device.h>
11 #include <scsi/fc/fc_fs.h>
12 #include <scsi/fc/fc_fcoe.h>
13 #include <scsi/libfc.h>
14 #include <scsi/libfcoe.h>
17 * ixgbe_fcoe_clear_ddp - clear the given ddp context
18 * @ddp: ptr to the ixgbe_fcoe_ddp
23 static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp)
34 * ixgbe_fcoe_ddp_put - free the ddp context for a given xid
35 * @netdev: the corresponding net_device
36 * @xid: the xid that corresponding ddp will be freed
38 * This is the implementation of net_device_ops.ndo_fcoe_ddp_done
39 * and it is expected to be called by ULD, i.e., FCP layer of libfc
40 * to release the corresponding ddp context when the I/O is done.
42 * Returns : data length already ddp-ed in bytes
44 int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
47 struct ixgbe_fcoe *fcoe;
48 struct ixgbe_adapter *adapter;
49 struct ixgbe_fcoe_ddp *ddp;
56 if (xid >= netdev->fcoe_ddp_xid)
59 adapter = netdev_priv(netdev);
60 fcoe = &adapter->fcoe;
61 ddp = &fcoe->ddp[xid];
67 /* if no error then skip ddp context invalidation */
71 if (hw->mac.type == ixgbe_mac_X550) {
72 /* X550 does not require DDP FCoE lock */
74 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), 0);
75 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid),
76 (xid | IXGBE_FCFLTRW_WE));
79 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), 0);
82 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
83 (xid | IXGBE_FCDMARW_WE));
85 /* read FCBUFF to check context invalidated */
86 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
87 (xid | IXGBE_FCDMARW_RE));
88 fcbuff = IXGBE_READ_REG(hw, IXGBE_FCDDC(2, xid));
90 /* other hardware requires DDP FCoE lock */
91 spin_lock_bh(&fcoe->lock);
92 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, 0);
93 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW,
94 (xid | IXGBE_FCFLTRW_WE));
95 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, 0);
96 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW,
97 (xid | IXGBE_FCDMARW_WE));
99 /* guaranteed to be invalidated after 100us */
100 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW,
101 (xid | IXGBE_FCDMARW_RE));
102 fcbuff = IXGBE_READ_REG(hw, IXGBE_FCBUFF);
103 spin_unlock_bh(&fcoe->lock);
106 if (fcbuff & IXGBE_FCBUFF_VALID)
107 usleep_range(100, 150);
111 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc,
114 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
118 ixgbe_fcoe_clear_ddp(ddp);
124 * ixgbe_fcoe_ddp_setup - called to set up ddp context
125 * @netdev: the corresponding net_device
126 * @xid: the exchange id requesting ddp
127 * @sgl: the scatter-gather list for this request
128 * @sgc: the number of scatter-gather items
129 * @target_mode: 1 to setup target mode, 0 to setup initiator mode
131 * Returns : 1 for success and 0 for no ddp
133 static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
134 struct scatterlist *sgl, unsigned int sgc,
137 struct ixgbe_adapter *adapter;
139 struct ixgbe_fcoe *fcoe;
140 struct ixgbe_fcoe_ddp *ddp;
141 struct ixgbe_fcoe_ddp_pool *ddp_pool;
142 struct scatterlist *sg;
143 unsigned int i, j, dmacount;
145 static const unsigned int bufflen = IXGBE_FCBUFF_MIN;
146 unsigned int firstoff = 0;
147 unsigned int lastsize;
148 unsigned int thisoff = 0;
149 unsigned int thislen = 0;
150 u32 fcbuff, fcdmarw, fcfltrw, fcrxctl;
156 adapter = netdev_priv(netdev);
157 if (xid >= netdev->fcoe_ddp_xid) {
158 e_warn(drv, "xid=0x%x out-of-range\n", xid);
162 /* no DDP if we are already down or resetting */
163 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
164 test_bit(__IXGBE_RESETTING, &adapter->state))
167 fcoe = &adapter->fcoe;
168 ddp = &fcoe->ddp[xid];
170 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
171 xid, ddp->sgl, ddp->sgc);
174 ixgbe_fcoe_clear_ddp(ddp);
177 if (!fcoe->ddp_pool) {
178 e_warn(drv, "No ddp_pool resources allocated\n");
182 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, get_cpu());
183 if (!ddp_pool->pool) {
184 e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);
188 /* setup dma from scsi command sgl */
189 dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
191 e_err(drv, "xid 0x%x DMA map error\n", xid);
195 /* alloc the udl from per cpu ddp pool */
196 ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp);
198 e_err(drv, "failed allocated ddp context\n");
199 goto out_noddp_unmap;
201 ddp->pool = ddp_pool->pool;
206 for_each_sg(sgl, sg, dmacount, i) {
207 addr = sg_dma_address(sg);
208 len = sg_dma_len(sg);
210 /* max number of buffers allowed in one DDP context */
211 if (j >= IXGBE_BUFFCNT_MAX) {
216 /* get the offset of length of current buffer */
217 thisoff = addr & ((dma_addr_t)bufflen - 1);
218 thislen = min((bufflen - thisoff), len);
220 * all but the 1st buffer (j == 0)
221 * must be aligned on bufflen
223 if ((j != 0) && (thisoff))
226 * all but the last buffer
227 * ((i == (dmacount - 1)) && (thislen == len))
228 * must end at bufflen
230 if (((i != (dmacount - 1)) || (thislen != len))
231 && ((thislen + thisoff) != bufflen))
234 ddp->udl[j] = (u64)(addr - thisoff);
235 /* only the first buffer may have none-zero offset */
243 /* only the last buffer may have non-full bufflen */
244 lastsize = thisoff + thislen;
247 * lastsize can not be buffer len.
248 * If it is then adding another buffer with lastsize = 1.
250 if (lastsize == bufflen) {
251 if (j >= IXGBE_BUFFCNT_MAX) {
252 ddp_pool->noddp_ext_buff++;
256 ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma);
262 fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT);
263 fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT);
264 fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT);
265 /* Set WRCONTX bit to allow DDP for target */
267 fcbuff |= (IXGBE_FCBUFF_WRCONTX);
268 fcbuff |= (IXGBE_FCBUFF_VALID);
271 fcdmarw |= IXGBE_FCDMARW_WE;
272 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT);
275 fcfltrw |= IXGBE_FCFLTRW_WE;
277 /* program DMA context */
280 /* turn on last frame indication for target mode as FCP_RSPtarget is
281 * supposed to send FCP_RSP when it is done. */
282 if (target_mode && !test_bit(__IXGBE_FCOE_TARGET, &fcoe->mode)) {
283 set_bit(__IXGBE_FCOE_TARGET, &fcoe->mode);
284 fcrxctl = IXGBE_READ_REG(hw, IXGBE_FCRXCTRL);
285 fcrxctl |= IXGBE_FCRXCTRL_LASTSEQH;
286 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, fcrxctl);
289 if (hw->mac.type == ixgbe_mac_X550) {
290 /* X550 does not require DDP lock */
292 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(0, xid),
293 ddp->udp & DMA_BIT_MASK(32));
294 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(1, xid), (u64)ddp->udp >> 32);
295 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), fcbuff);
296 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), fcdmarw);
297 /* program filter context */
298 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), IXGBE_FCFLT_VALID);
299 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(1, xid), 0);
300 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid), fcfltrw);
302 /* DDP lock for indirect DDP context access */
303 spin_lock_bh(&fcoe->lock);
305 IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32));
306 IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32);
307 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff);
308 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw);
309 /* program filter context */
310 IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0);
311 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID);
312 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw);
314 spin_unlock_bh(&fcoe->lock);
320 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
321 ixgbe_fcoe_clear_ddp(ddp);
324 dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
331 * ixgbe_fcoe_ddp_get - called to set up ddp context in initiator 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_setup
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.
342 * Returns : 1 for success and 0 for no ddp
344 int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
345 struct scatterlist *sgl, unsigned int sgc)
347 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0);
351 * ixgbe_fcoe_ddp_target - called to set up ddp context in target mode
352 * @netdev: the corresponding net_device
353 * @xid: the exchange id requesting ddp
354 * @sgl: the scatter-gather list for this request
355 * @sgc: the number of scatter-gather items
357 * This is the implementation of net_device_ops.ndo_fcoe_ddp_target
358 * and is expected to be called from ULD, e.g., FCP layer of libfc
359 * to set up ddp for the corresponding xid of the given sglist for
360 * the corresponding I/O. The DDP in target mode is a write I/O request
361 * from the initiator.
363 * Returns : 1 for success and 0 for no ddp
365 int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid,
366 struct scatterlist *sgl, unsigned int sgc)
368 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1);
372 * ixgbe_fcoe_ddp - check ddp status and mark it done
373 * @adapter: ixgbe adapter
374 * @rx_desc: advanced rx descriptor
375 * @skb: the skb holding the received data
377 * This checks ddp status.
379 * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates
380 * not passing the skb to ULD, > 0 indicates is the length of data
383 int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
384 union ixgbe_adv_rx_desc *rx_desc,
388 struct ixgbe_fcoe *fcoe;
389 struct ixgbe_fcoe_ddp *ddp;
390 struct fc_frame_header *fh;
391 struct fcoe_crc_eof *crc;
392 __le32 fcerr = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCERR);
398 if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC))
399 skb->ip_summed = CHECKSUM_NONE;
401 skb->ip_summed = CHECKSUM_UNNECESSARY;
403 if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
404 fh = (struct fc_frame_header *)(skb->data +
405 sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr));
407 fh = (struct fc_frame_header *)(skb->data +
408 sizeof(struct fcoe_hdr));
410 fctl = ntoh24(fh->fh_f_ctl);
411 if (fctl & FC_FC_EX_CTX)
412 xid = be16_to_cpu(fh->fh_ox_id);
414 xid = be16_to_cpu(fh->fh_rx_id);
416 ddp_max = IXGBE_FCOE_DDP_MAX;
417 /* X550 has different DDP Max limit */
418 if (adapter->hw.mac.type == ixgbe_mac_X550)
419 ddp_max = IXGBE_FCOE_DDP_MAX_X550;
423 fcoe = &adapter->fcoe;
424 ddp = &fcoe->ddp[xid];
428 ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE |
429 IXGBE_RXDADV_ERR_FCERR);
433 switch (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_FCSTAT)) {
434 /* return 0 to bypass going to ULD for DDPed data */
435 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_DDP):
436 /* update length of DDPed data */
437 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
440 /* unmap the sg list when FCPRSP is received */
441 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_FCPRSP):
442 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl,
443 ddp->sgc, DMA_FROM_DEVICE);
444 ddp->err = (__force u32)ddp_err;
448 /* if DDP length is present pass it through to ULD */
449 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NODDP):
450 /* update length of DDPed data */
451 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
455 /* no match will return as an error */
456 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH):
461 /* In target mode, check the last data frame of the sequence.
462 * For DDP in target mode, data is already DDPed but the header
463 * indication of the last data frame ould allow is to tell if we
464 * got all the data and the ULP can send FCP_RSP back, as this is
465 * not a full fcoe frame, we fill the trailer here so it won't be
466 * dropped by the ULP stack.
468 if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) &&
469 (fctl & FC_FC_END_SEQ)) {
471 crc = skb_put(skb, sizeof(*crc));
472 crc->fcoe_eof = FC_EOF_T;
479 * ixgbe_fso - ixgbe FCoE Sequence Offload (FSO)
480 * @tx_ring: tx desc ring
481 * @first: first tx_buffer structure containing skb, tx_flags, and protocol
482 * @hdr_len: hdr_len to be returned
484 * This sets up large send offload for FCoE
486 * Returns : 0 indicates success, < 0 for error
488 int ixgbe_fso(struct ixgbe_ring *tx_ring,
489 struct ixgbe_tx_buffer *first,
492 struct sk_buff *skb = first->skb;
493 struct fc_frame_header *fh;
495 u32 fcoe_sof_eof = 0;
497 u32 type_tucmd = IXGBE_ADVTXT_TUCMD_FCOE;
500 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) {
501 dev_err(tx_ring->dev, "Wrong gso type %d:expecting SKB_GSO_FCOE\n",
502 skb_shinfo(skb)->gso_type);
506 /* resets the header to point fcoe/fc */
507 skb_set_network_header(skb, skb->mac_len);
508 skb_set_transport_header(skb, skb->mac_len +
509 sizeof(struct fcoe_hdr));
511 /* sets up SOF and ORIS */
512 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof;
515 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS;
518 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF |
519 IXGBE_ADVTXD_FCOEF_ORIS;
524 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF;
527 dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof);
531 /* the first byte of the last dword is EOF */
532 skb_copy_bits(skb, skb->len - 4, &eof, 1);
533 /* sets up EOF and ORIE */
536 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
541 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N |
542 IXGBE_ADVTXD_FCOEF_ORIE;
544 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T;
547 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI;
550 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A;
553 dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof);
557 /* sets up PARINC indicating data offset */
558 fh = (struct fc_frame_header *)skb_transport_header(skb);
559 if (fh->fh_f_ctl[2] & FC_FC_REL_OFF)
560 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC;
562 /* include trailer in headlen as it is replicated per frame */
563 *hdr_len = sizeof(struct fcoe_crc_eof);
565 /* hdr_len includes fc_hdr if FCoE LSO is enabled */
566 if (skb_is_gso(skb)) {
567 *hdr_len += skb_transport_offset(skb) +
568 sizeof(struct fc_frame_header);
569 /* update gso_segs and bytecount */
570 first->gso_segs = DIV_ROUND_UP(skb->len - *hdr_len,
571 skb_shinfo(skb)->gso_size);
572 first->bytecount += (first->gso_segs - 1) * *hdr_len;
573 first->tx_flags |= IXGBE_TX_FLAGS_TSO;
574 /* Hardware expects L4T to be RSV for FCoE TSO */
575 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_RSV;
578 /* set flag indicating FCOE to ixgbe_tx_map call */
579 first->tx_flags |= IXGBE_TX_FLAGS_FCOE | IXGBE_TX_FLAGS_CC;
581 /* mss_l4len_id: use 0 for FSO as TSO, no need for L4LEN */
582 mss_l4len_idx = skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
584 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
585 vlan_macip_lens = skb_transport_offset(skb) +
586 sizeof(struct fc_frame_header);
587 vlan_macip_lens |= (skb_transport_offset(skb) - 4)
588 << IXGBE_ADVTXD_MACLEN_SHIFT;
589 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
591 /* write context desc */
592 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof,
593 type_tucmd, mss_l4len_idx);
598 static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu)
600 struct ixgbe_fcoe_ddp_pool *ddp_pool;
602 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
603 dma_pool_destroy(ddp_pool->pool);
604 ddp_pool->pool = NULL;
607 static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe,
611 struct ixgbe_fcoe_ddp_pool *ddp_pool;
612 struct dma_pool *pool;
615 snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%u", cpu);
617 pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX,
618 IXGBE_FCPTR_ALIGN, PAGE_SIZE);
622 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
623 ddp_pool->pool = pool;
625 ddp_pool->noddp_ext_buff = 0;
631 * ixgbe_configure_fcoe - configures registers for fcoe at start
632 * @adapter: ptr to ixgbe adapter
634 * This sets up FCoE related registers
638 void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
640 struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE];
641 struct ixgbe_hw *hw = &adapter->hw;
642 int i, fcoe_q, fcoe_i, fcoe_q_h = 0;
646 /* Minimal functionality for FCoE requires at least CRC offloads */
647 if (!(adapter->netdev->features & NETIF_F_FCOE_CRC))
650 /* Enable L2 EtherType filter for FCoE, needed for FCoE CRC and DDP */
651 etqf = ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN;
652 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
653 etqf |= IXGBE_ETQF_POOL_ENABLE;
654 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT;
656 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf);
657 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0);
659 /* leave registers un-configured if FCoE is disabled */
660 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
663 /* Use one or more Rx queues for FCoE by redirection table */
664 fcreta_size = IXGBE_FCRETA_SIZE;
665 if (adapter->hw.mac.type == ixgbe_mac_X550)
666 fcreta_size = IXGBE_FCRETA_SIZE_X550;
668 for (i = 0; i < fcreta_size; i++) {
669 if (adapter->hw.mac.type == ixgbe_mac_X550) {
670 int fcoe_i_h = fcoe->offset + ((i + fcreta_size) %
672 fcoe_q_h = adapter->rx_ring[fcoe_i_h]->reg_idx;
673 fcoe_q_h = FIELD_PREP(IXGBE_FCRETA_ENTRY_HIGH_MASK,
677 fcoe_i = fcoe->offset + (i % fcoe->indices);
678 fcoe_i &= IXGBE_FCRETA_ENTRY_MASK;
679 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
681 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
683 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA);
685 /* Enable L2 EtherType filter for FIP */
686 etqf = ETH_P_FIP | IXGBE_ETQF_FILTER_EN;
687 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
688 etqf |= IXGBE_ETQF_POOL_ENABLE;
689 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT;
691 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf);
693 /* Send FIP frames to the first FCoE queue */
694 fcoe_q = adapter->rx_ring[fcoe->offset]->reg_idx;
695 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP),
696 IXGBE_ETQS_QUEUE_EN |
697 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
699 /* Configure FCoE Rx control */
700 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
701 IXGBE_FCRXCTRL_FCCRCBO |
702 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
706 * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources
707 * @adapter : ixgbe adapter
709 * Cleans up outstanding ddp context resources
713 void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
715 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
718 /* do nothing if no DDP pools were allocated */
722 ddp_max = IXGBE_FCOE_DDP_MAX;
723 /* X550 has different DDP Max limit */
724 if (adapter->hw.mac.type == ixgbe_mac_X550)
725 ddp_max = IXGBE_FCOE_DDP_MAX_X550;
727 for (i = 0; i < ddp_max; i++)
728 ixgbe_fcoe_ddp_put(adapter->netdev, i);
730 for_each_possible_cpu(cpu)
731 ixgbe_fcoe_dma_pool_free(fcoe, cpu);
733 dma_unmap_single(&adapter->pdev->dev,
734 fcoe->extra_ddp_buffer_dma,
737 kfree(fcoe->extra_ddp_buffer);
739 fcoe->extra_ddp_buffer = NULL;
740 fcoe->extra_ddp_buffer_dma = 0;
744 * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources
745 * @adapter: ixgbe adapter
747 * Sets up ddp context resouces
749 * Returns : 0 indicates success or -EINVAL on failure
751 int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
753 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
754 struct device *dev = &adapter->pdev->dev;
759 /* do nothing if no DDP pools were allocated */
763 /* Extra buffer to be shared by all DDPs for HW work around */
764 buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_KERNEL);
768 dma = dma_map_single(dev, buffer, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE);
769 if (dma_mapping_error(dev, dma)) {
770 e_err(drv, "failed to map extra DDP buffer\n");
775 fcoe->extra_ddp_buffer = buffer;
776 fcoe->extra_ddp_buffer_dma = dma;
778 /* allocate pci pool for each cpu */
779 for_each_possible_cpu(cpu) {
780 int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu);
784 e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu);
785 ixgbe_free_fcoe_ddp_resources(adapter);
792 static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter)
794 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
796 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
799 fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool);
801 if (!fcoe->ddp_pool) {
802 e_err(drv, "failed to allocate percpu DDP resources\n");
806 adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
807 /* X550 has different DDP Max limit */
808 if (adapter->hw.mac.type == ixgbe_mac_X550)
809 adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX_X550 - 1;
814 static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter)
816 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
818 adapter->netdev->fcoe_ddp_xid = 0;
823 free_percpu(fcoe->ddp_pool);
824 fcoe->ddp_pool = NULL;
828 * ixgbe_fcoe_enable - turn on FCoE offload feature
829 * @netdev: the corresponding netdev
831 * Turns on FCoE offload feature in 82599.
833 * Returns : 0 indicates success or -EINVAL on failure
835 int ixgbe_fcoe_enable(struct net_device *netdev)
837 struct ixgbe_adapter *adapter = netdev_priv(netdev);
838 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
840 atomic_inc(&fcoe->refcnt);
842 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
845 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
848 e_info(drv, "Enabling FCoE offload features.\n");
850 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
851 e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n");
853 if (netif_running(netdev))
854 netdev->netdev_ops->ndo_stop(netdev);
856 /* Allocate per CPU memory to track DDP pools */
857 ixgbe_fcoe_ddp_enable(adapter);
859 /* enable FCoE and notify stack */
860 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
861 netdev->features |= NETIF_F_FCOE_MTU;
862 netdev_features_change(netdev);
864 /* release existing queues and reallocate them */
865 ixgbe_clear_interrupt_scheme(adapter);
866 ixgbe_init_interrupt_scheme(adapter);
868 if (netif_running(netdev))
869 netdev->netdev_ops->ndo_open(netdev);
875 * ixgbe_fcoe_disable - turn off FCoE offload feature
876 * @netdev: the corresponding netdev
878 * Turns off FCoE offload feature in 82599.
880 * Returns : 0 indicates success or -EINVAL on failure
882 int ixgbe_fcoe_disable(struct net_device *netdev)
884 struct ixgbe_adapter *adapter = netdev_priv(netdev);
886 if (!atomic_dec_and_test(&adapter->fcoe.refcnt))
889 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
892 e_info(drv, "Disabling FCoE offload features.\n");
893 if (netif_running(netdev))
894 netdev->netdev_ops->ndo_stop(netdev);
896 /* Free per CPU memory to track DDP pools */
897 ixgbe_fcoe_ddp_disable(adapter);
899 /* disable FCoE and notify stack */
900 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
901 netdev->features &= ~NETIF_F_FCOE_MTU;
903 netdev_features_change(netdev);
905 /* release existing queues and reallocate them */
906 ixgbe_clear_interrupt_scheme(adapter);
907 ixgbe_init_interrupt_scheme(adapter);
909 if (netif_running(netdev))
910 netdev->netdev_ops->ndo_open(netdev);
916 * ixgbe_fcoe_get_wwn - get world wide name for the node or the port
917 * @netdev : ixgbe adapter
918 * @wwn : the world wide name
919 * @type: the type of world wide name
921 * Returns the node or port world wide name if both the prefix and the san
922 * mac address are valid, then the wwn is formed based on the NAA-2 for
923 * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3).
925 * Returns : 0 on success
927 int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
930 struct ixgbe_adapter *adapter = netdev_priv(netdev);
931 struct ixgbe_mac_info *mac = &adapter->hw.mac;
934 case NETDEV_FCOE_WWNN:
935 prefix = mac->wwnn_prefix;
937 case NETDEV_FCOE_WWPN:
938 prefix = mac->wwpn_prefix;
944 if ((prefix != 0xffff) &&
945 is_valid_ether_addr(mac->san_addr)) {
946 *wwn = ((u64) prefix << 48) |
947 ((u64) mac->san_addr[0] << 40) |
948 ((u64) mac->san_addr[1] << 32) |
949 ((u64) mac->san_addr[2] << 24) |
950 ((u64) mac->san_addr[3] << 16) |
951 ((u64) mac->san_addr[4] << 8) |
952 ((u64) mac->san_addr[5]);
959 * ixgbe_fcoe_get_hbainfo - get FCoE HBA information
960 * @netdev : ixgbe adapter
961 * @info : HBA information
963 * Returns ixgbe HBA information
965 * Returns : 0 on success
967 int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
968 struct netdev_fcoe_hbainfo *info)
970 struct ixgbe_adapter *adapter = netdev_priv(netdev);
971 struct ixgbe_hw *hw = &adapter->hw;
977 /* Don't return information on unsupported devices */
978 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
982 snprintf(info->manufacturer, sizeof(info->manufacturer),
983 "Intel Corporation");
987 /* Get the PCI-e Device Serial Number Capability */
988 dsn = pci_get_dsn(adapter->pdev);
990 snprintf(info->serial_number, sizeof(info->serial_number),
993 snprintf(info->serial_number, sizeof(info->serial_number),
996 /* Hardware Version */
997 snprintf(info->hardware_version,
998 sizeof(info->hardware_version),
999 "Rev %d", hw->revision_id);
1000 /* Driver Name/Version */
1001 snprintf(info->driver_version,
1002 sizeof(info->driver_version),
1006 /* Firmware Version */
1007 strscpy(info->firmware_version, adapter->eeprom_id,
1008 sizeof(info->firmware_version));
1011 if (hw->mac.type == ixgbe_mac_82599EB) {
1012 snprintf(info->model,
1013 sizeof(info->model),
1015 } else if (hw->mac.type == ixgbe_mac_X550) {
1016 snprintf(info->model,
1017 sizeof(info->model),
1020 snprintf(info->model,
1021 sizeof(info->model),
1025 /* Model Description */
1026 snprintf(info->model_description,
1027 sizeof(info->model_description),
1029 ixgbe_default_device_descr);
1035 * ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to
1036 * @adapter: pointer to the device adapter structure
1038 * Return : TC that FCoE is mapped to
1040 u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter)
1042 #ifdef CONFIG_IXGBE_DCB
1043 return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up);