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 <scsi/scsi_cmnd.h>
9 #include <scsi/scsi_device.h>
10 #include <scsi/fc/fc_fs.h>
11 #include <scsi/fc/fc_fcoe.h>
12 #include <scsi/libfc.h>
13 #include <scsi/libfcoe.h>
16 * ixgbe_fcoe_clear_ddp - clear the given ddp context
17 * @ddp: ptr to the ixgbe_fcoe_ddp
22 static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp)
33 * ixgbe_fcoe_ddp_put - free the ddp context for a given xid
34 * @netdev: the corresponding net_device
35 * @xid: the xid that corresponding ddp will be freed
37 * This is the implementation of net_device_ops.ndo_fcoe_ddp_done
38 * and it is expected to be called by ULD, i.e., FCP layer of libfc
39 * to release the corresponding ddp context when the I/O is done.
41 * Returns : data length already ddp-ed in bytes
43 int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
46 struct ixgbe_fcoe *fcoe;
47 struct ixgbe_adapter *adapter;
48 struct ixgbe_fcoe_ddp *ddp;
55 if (xid >= netdev->fcoe_ddp_xid)
58 adapter = netdev_priv(netdev);
59 fcoe = &adapter->fcoe;
60 ddp = &fcoe->ddp[xid];
66 /* if no error then skip ddp context invalidation */
70 if (hw->mac.type == ixgbe_mac_X550) {
71 /* X550 does not require DDP FCoE lock */
73 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), 0);
74 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid),
75 (xid | IXGBE_FCFLTRW_WE));
78 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), 0);
81 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
82 (xid | IXGBE_FCDMARW_WE));
84 /* read FCBUFF to check context invalidated */
85 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
86 (xid | IXGBE_FCDMARW_RE));
87 fcbuff = IXGBE_READ_REG(hw, IXGBE_FCDDC(2, xid));
89 /* other hardware requires DDP FCoE lock */
90 spin_lock_bh(&fcoe->lock);
91 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, 0);
92 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW,
93 (xid | IXGBE_FCFLTRW_WE));
94 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, 0);
95 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW,
96 (xid | IXGBE_FCDMARW_WE));
98 /* guaranteed to be invalidated after 100us */
99 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW,
100 (xid | IXGBE_FCDMARW_RE));
101 fcbuff = IXGBE_READ_REG(hw, IXGBE_FCBUFF);
102 spin_unlock_bh(&fcoe->lock);
105 if (fcbuff & IXGBE_FCBUFF_VALID)
106 usleep_range(100, 150);
110 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc,
113 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
117 ixgbe_fcoe_clear_ddp(ddp);
123 * ixgbe_fcoe_ddp_setup - called to set up ddp context
124 * @netdev: the corresponding net_device
125 * @xid: the exchange id requesting ddp
126 * @sgl: the scatter-gather list for this request
127 * @sgc: the number of scatter-gather items
128 * @target_mode: 1 to setup target mode, 0 to setup initiator mode
130 * Returns : 1 for success and 0 for no ddp
132 static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
133 struct scatterlist *sgl, unsigned int sgc,
136 struct ixgbe_adapter *adapter;
138 struct ixgbe_fcoe *fcoe;
139 struct ixgbe_fcoe_ddp *ddp;
140 struct ixgbe_fcoe_ddp_pool *ddp_pool;
141 struct scatterlist *sg;
142 unsigned int i, j, dmacount;
144 static const unsigned int bufflen = IXGBE_FCBUFF_MIN;
145 unsigned int firstoff = 0;
146 unsigned int lastsize;
147 unsigned int thisoff = 0;
148 unsigned int thislen = 0;
149 u32 fcbuff, fcdmarw, fcfltrw, fcrxctl;
155 adapter = netdev_priv(netdev);
156 if (xid >= netdev->fcoe_ddp_xid) {
157 e_warn(drv, "xid=0x%x out-of-range\n", xid);
161 /* no DDP if we are already down or resetting */
162 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
163 test_bit(__IXGBE_RESETTING, &adapter->state))
166 fcoe = &adapter->fcoe;
167 ddp = &fcoe->ddp[xid];
169 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
170 xid, ddp->sgl, ddp->sgc);
173 ixgbe_fcoe_clear_ddp(ddp);
176 if (!fcoe->ddp_pool) {
177 e_warn(drv, "No ddp_pool resources allocated\n");
181 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, get_cpu());
182 if (!ddp_pool->pool) {
183 e_warn(drv, "xid=0x%x no ddp pool for fcoe\n", xid);
187 /* setup dma from scsi command sgl */
188 dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
190 e_err(drv, "xid 0x%x DMA map error\n", xid);
194 /* alloc the udl from per cpu ddp pool */
195 ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_KERNEL, &ddp->udp);
197 e_err(drv, "failed allocated ddp context\n");
198 goto out_noddp_unmap;
200 ddp->pool = ddp_pool->pool;
205 for_each_sg(sgl, sg, dmacount, i) {
206 addr = sg_dma_address(sg);
207 len = sg_dma_len(sg);
209 /* max number of buffers allowed in one DDP context */
210 if (j >= IXGBE_BUFFCNT_MAX) {
215 /* get the offset of length of current buffer */
216 thisoff = addr & ((dma_addr_t)bufflen - 1);
217 thislen = min((bufflen - thisoff), len);
219 * all but the 1st buffer (j == 0)
220 * must be aligned on bufflen
222 if ((j != 0) && (thisoff))
225 * all but the last buffer
226 * ((i == (dmacount - 1)) && (thislen == len))
227 * must end at bufflen
229 if (((i != (dmacount - 1)) || (thislen != len))
230 && ((thislen + thisoff) != bufflen))
233 ddp->udl[j] = (u64)(addr - thisoff);
234 /* only the first buffer may have none-zero offset */
242 /* only the last buffer may have non-full bufflen */
243 lastsize = thisoff + thislen;
246 * lastsize can not be buffer len.
247 * If it is then adding another buffer with lastsize = 1.
249 if (lastsize == bufflen) {
250 if (j >= IXGBE_BUFFCNT_MAX) {
251 ddp_pool->noddp_ext_buff++;
255 ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma);
261 fcbuff = (IXGBE_FCBUFF_4KB << IXGBE_FCBUFF_BUFFSIZE_SHIFT);
262 fcbuff |= ((j & 0xff) << IXGBE_FCBUFF_BUFFCNT_SHIFT);
263 fcbuff |= (firstoff << IXGBE_FCBUFF_OFFSET_SHIFT);
264 /* Set WRCONTX bit to allow DDP for target */
266 fcbuff |= (IXGBE_FCBUFF_WRCONTX);
267 fcbuff |= (IXGBE_FCBUFF_VALID);
270 fcdmarw |= IXGBE_FCDMARW_WE;
271 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT);
274 fcfltrw |= IXGBE_FCFLTRW_WE;
276 /* program DMA context */
279 /* turn on last frame indication for target mode as FCP_RSPtarget is
280 * supposed to send FCP_RSP when it is done. */
281 if (target_mode && !test_bit(__IXGBE_FCOE_TARGET, &fcoe->mode)) {
282 set_bit(__IXGBE_FCOE_TARGET, &fcoe->mode);
283 fcrxctl = IXGBE_READ_REG(hw, IXGBE_FCRXCTRL);
284 fcrxctl |= IXGBE_FCRXCTRL_LASTSEQH;
285 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL, fcrxctl);
288 if (hw->mac.type == ixgbe_mac_X550) {
289 /* X550 does not require DDP lock */
291 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(0, xid),
292 ddp->udp & DMA_BIT_MASK(32));
293 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(1, xid), (u64)ddp->udp >> 32);
294 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), fcbuff);
295 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid), fcdmarw);
296 /* program filter context */
297 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), IXGBE_FCFLT_VALID);
298 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(1, xid), 0);
299 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid), fcfltrw);
301 /* DDP lock for indirect DDP context access */
302 spin_lock_bh(&fcoe->lock);
304 IXGBE_WRITE_REG(hw, IXGBE_FCPTRL, ddp->udp & DMA_BIT_MASK(32));
305 IXGBE_WRITE_REG(hw, IXGBE_FCPTRH, (u64)ddp->udp >> 32);
306 IXGBE_WRITE_REG(hw, IXGBE_FCBUFF, fcbuff);
307 IXGBE_WRITE_REG(hw, IXGBE_FCDMARW, fcdmarw);
308 /* program filter context */
309 IXGBE_WRITE_REG(hw, IXGBE_FCPARAM, 0);
310 IXGBE_WRITE_REG(hw, IXGBE_FCFLT, IXGBE_FCFLT_VALID);
311 IXGBE_WRITE_REG(hw, IXGBE_FCFLTRW, fcfltrw);
313 spin_unlock_bh(&fcoe->lock);
319 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
320 ixgbe_fcoe_clear_ddp(ddp);
323 dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
330 * ixgbe_fcoe_ddp_get - called to set up ddp context in initiator mode
331 * @netdev: the corresponding net_device
332 * @xid: the exchange id requesting ddp
333 * @sgl: the scatter-gather list for this request
334 * @sgc: the number of scatter-gather items
336 * This is the implementation of net_device_ops.ndo_fcoe_ddp_setup
337 * and is expected to be called from ULD, e.g., FCP layer of libfc
338 * to set up ddp for the corresponding xid of the given sglist for
339 * the corresponding I/O.
341 * Returns : 1 for success and 0 for no ddp
343 int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
344 struct scatterlist *sgl, unsigned int sgc)
346 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0);
350 * ixgbe_fcoe_ddp_target - called to set up ddp context in target mode
351 * @netdev: the corresponding net_device
352 * @xid: the exchange id requesting ddp
353 * @sgl: the scatter-gather list for this request
354 * @sgc: the number of scatter-gather items
356 * This is the implementation of net_device_ops.ndo_fcoe_ddp_target
357 * and is expected to be called from ULD, e.g., FCP layer of libfc
358 * to set up ddp for the corresponding xid of the given sglist for
359 * the corresponding I/O. The DDP in target mode is a write I/O request
360 * from the initiator.
362 * Returns : 1 for success and 0 for no ddp
364 int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid,
365 struct scatterlist *sgl, unsigned int sgc)
367 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1);
371 * ixgbe_fcoe_ddp - check ddp status and mark it done
372 * @adapter: ixgbe adapter
373 * @rx_desc: advanced rx descriptor
374 * @skb: the skb holding the received data
376 * This checks ddp status.
378 * Returns : < 0 indicates an error or not a FCiE ddp, 0 indicates
379 * not passing the skb to ULD, > 0 indicates is the length of data
382 int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
383 union ixgbe_adv_rx_desc *rx_desc,
387 struct ixgbe_fcoe *fcoe;
388 struct ixgbe_fcoe_ddp *ddp;
389 struct fc_frame_header *fh;
390 struct fcoe_crc_eof *crc;
391 __le32 fcerr = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCERR);
397 if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC))
398 skb->ip_summed = CHECKSUM_NONE;
400 skb->ip_summed = CHECKSUM_UNNECESSARY;
402 if (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q))
403 fh = (struct fc_frame_header *)(skb->data +
404 sizeof(struct vlan_hdr) + sizeof(struct fcoe_hdr));
406 fh = (struct fc_frame_header *)(skb->data +
407 sizeof(struct fcoe_hdr));
409 fctl = ntoh24(fh->fh_f_ctl);
410 if (fctl & FC_FC_EX_CTX)
411 xid = be16_to_cpu(fh->fh_ox_id);
413 xid = be16_to_cpu(fh->fh_rx_id);
415 ddp_max = IXGBE_FCOE_DDP_MAX;
416 /* X550 has different DDP Max limit */
417 if (adapter->hw.mac.type == ixgbe_mac_X550)
418 ddp_max = IXGBE_FCOE_DDP_MAX_X550;
422 fcoe = &adapter->fcoe;
423 ddp = &fcoe->ddp[xid];
427 ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE |
428 IXGBE_RXDADV_ERR_FCERR);
432 switch (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_FCSTAT)) {
433 /* return 0 to bypass going to ULD for DDPed data */
434 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_DDP):
435 /* update length of DDPed data */
436 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
439 /* unmap the sg list when FCPRSP is received */
440 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_FCPRSP):
441 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl,
442 ddp->sgc, DMA_FROM_DEVICE);
443 ddp->err = (__force u32)ddp_err;
447 /* if DDP length is present pass it through to ULD */
448 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NODDP):
449 /* update length of DDPed data */
450 ddp->len = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
454 /* no match will return as an error */
455 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH):
460 /* In target mode, check the last data frame of the sequence.
461 * For DDP in target mode, data is already DDPed but the header
462 * indication of the last data frame ould allow is to tell if we
463 * got all the data and the ULP can send FCP_RSP back, as this is
464 * not a full fcoe frame, we fill the trailer here so it won't be
465 * dropped by the ULP stack.
467 if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) &&
468 (fctl & FC_FC_END_SEQ)) {
470 crc = skb_put(skb, sizeof(*crc));
471 crc->fcoe_eof = FC_EOF_T;
478 * ixgbe_fso - ixgbe FCoE Sequence Offload (FSO)
479 * @tx_ring: tx desc ring
480 * @first: first tx_buffer structure containing skb, tx_flags, and protocol
481 * @hdr_len: hdr_len to be returned
483 * This sets up large send offload for FCoE
485 * Returns : 0 indicates success, < 0 for error
487 int ixgbe_fso(struct ixgbe_ring *tx_ring,
488 struct ixgbe_tx_buffer *first,
491 struct sk_buff *skb = first->skb;
492 struct fc_frame_header *fh;
494 u32 fcoe_sof_eof = 0;
496 u32 type_tucmd = IXGBE_ADVTXT_TUCMD_FCOE;
499 if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_type != SKB_GSO_FCOE)) {
500 dev_err(tx_ring->dev, "Wrong gso type %d:expecting SKB_GSO_FCOE\n",
501 skb_shinfo(skb)->gso_type);
505 /* resets the header to point fcoe/fc */
506 skb_set_network_header(skb, skb->mac_len);
507 skb_set_transport_header(skb, skb->mac_len +
508 sizeof(struct fcoe_hdr));
510 /* sets up SOF and ORIS */
511 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof;
514 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS;
517 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF |
518 IXGBE_ADVTXD_FCOEF_ORIS;
523 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF;
526 dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof);
530 /* the first byte of the last dword is EOF */
531 skb_copy_bits(skb, skb->len - 4, &eof, 1);
532 /* sets up EOF and ORIE */
535 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
540 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N |
541 IXGBE_ADVTXD_FCOEF_ORIE;
543 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T;
546 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI;
549 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A;
552 dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof);
556 /* sets up PARINC indicating data offset */
557 fh = (struct fc_frame_header *)skb_transport_header(skb);
558 if (fh->fh_f_ctl[2] & FC_FC_REL_OFF)
559 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_PARINC;
561 /* include trailer in headlen as it is replicated per frame */
562 *hdr_len = sizeof(struct fcoe_crc_eof);
564 /* hdr_len includes fc_hdr if FCoE LSO is enabled */
565 if (skb_is_gso(skb)) {
566 *hdr_len += skb_transport_offset(skb) +
567 sizeof(struct fc_frame_header);
568 /* update gso_segs and bytecount */
569 first->gso_segs = DIV_ROUND_UP(skb->len - *hdr_len,
570 skb_shinfo(skb)->gso_size);
571 first->bytecount += (first->gso_segs - 1) * *hdr_len;
572 first->tx_flags |= IXGBE_TX_FLAGS_TSO;
573 /* Hardware expects L4T to be RSV for FCoE TSO */
574 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_RSV;
577 /* set flag indicating FCOE to ixgbe_tx_map call */
578 first->tx_flags |= IXGBE_TX_FLAGS_FCOE | IXGBE_TX_FLAGS_CC;
580 /* mss_l4len_id: use 0 for FSO as TSO, no need for L4LEN */
581 mss_l4len_idx = skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
583 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
584 vlan_macip_lens = skb_transport_offset(skb) +
585 sizeof(struct fc_frame_header);
586 vlan_macip_lens |= (skb_transport_offset(skb) - 4)
587 << IXGBE_ADVTXD_MACLEN_SHIFT;
588 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
590 /* write context desc */
591 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof,
592 type_tucmd, mss_l4len_idx);
597 static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu)
599 struct ixgbe_fcoe_ddp_pool *ddp_pool;
601 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
602 dma_pool_destroy(ddp_pool->pool);
603 ddp_pool->pool = NULL;
606 static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe,
610 struct ixgbe_fcoe_ddp_pool *ddp_pool;
611 struct dma_pool *pool;
614 snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%u", cpu);
616 pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX,
617 IXGBE_FCPTR_ALIGN, PAGE_SIZE);
621 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
622 ddp_pool->pool = pool;
624 ddp_pool->noddp_ext_buff = 0;
630 * ixgbe_configure_fcoe - configures registers for fcoe at start
631 * @adapter: ptr to ixgbe adapter
633 * This sets up FCoE related registers
637 void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
639 struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE];
640 struct ixgbe_hw *hw = &adapter->hw;
641 int i, fcoe_q, fcoe_i, fcoe_q_h = 0;
645 /* Minimal functionality for FCoE requires at least CRC offloads */
646 if (!(adapter->netdev->features & NETIF_F_FCOE_CRC))
649 /* Enable L2 EtherType filter for FCoE, needed for FCoE CRC and DDP */
650 etqf = ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN;
651 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
652 etqf |= IXGBE_ETQF_POOL_ENABLE;
653 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT;
655 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf);
656 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0);
658 /* leave registers un-configured if FCoE is disabled */
659 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
662 /* Use one or more Rx queues for FCoE by redirection table */
663 fcreta_size = IXGBE_FCRETA_SIZE;
664 if (adapter->hw.mac.type == ixgbe_mac_X550)
665 fcreta_size = IXGBE_FCRETA_SIZE_X550;
667 for (i = 0; i < fcreta_size; i++) {
668 if (adapter->hw.mac.type == ixgbe_mac_X550) {
669 int fcoe_i_h = fcoe->offset + ((i + fcreta_size) %
671 fcoe_q_h = adapter->rx_ring[fcoe_i_h]->reg_idx;
672 fcoe_q_h = (fcoe_q_h << IXGBE_FCRETA_ENTRY_HIGH_SHIFT) &
673 IXGBE_FCRETA_ENTRY_HIGH_MASK;
676 fcoe_i = fcoe->offset + (i % fcoe->indices);
677 fcoe_i &= IXGBE_FCRETA_ENTRY_MASK;
678 fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
680 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
682 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA);
684 /* Enable L2 EtherType filter for FIP */
685 etqf = ETH_P_FIP | IXGBE_ETQF_FILTER_EN;
686 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
687 etqf |= IXGBE_ETQF_POOL_ENABLE;
688 etqf |= VMDQ_P(0) << IXGBE_ETQF_POOL_SHIFT;
690 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf);
692 /* Send FIP frames to the first FCoE queue */
693 fcoe_q = adapter->rx_ring[fcoe->offset]->reg_idx;
694 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP),
695 IXGBE_ETQS_QUEUE_EN |
696 (fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
698 /* Configure FCoE Rx control */
699 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
700 IXGBE_FCRXCTRL_FCCRCBO |
701 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
705 * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources
706 * @adapter : ixgbe adapter
708 * Cleans up outstanding ddp context resources
712 void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
714 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
717 /* do nothing if no DDP pools were allocated */
721 ddp_max = IXGBE_FCOE_DDP_MAX;
722 /* X550 has different DDP Max limit */
723 if (adapter->hw.mac.type == ixgbe_mac_X550)
724 ddp_max = IXGBE_FCOE_DDP_MAX_X550;
726 for (i = 0; i < ddp_max; i++)
727 ixgbe_fcoe_ddp_put(adapter->netdev, i);
729 for_each_possible_cpu(cpu)
730 ixgbe_fcoe_dma_pool_free(fcoe, cpu);
732 dma_unmap_single(&adapter->pdev->dev,
733 fcoe->extra_ddp_buffer_dma,
736 kfree(fcoe->extra_ddp_buffer);
738 fcoe->extra_ddp_buffer = NULL;
739 fcoe->extra_ddp_buffer_dma = 0;
743 * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources
744 * @adapter: ixgbe adapter
746 * Sets up ddp context resouces
748 * Returns : 0 indicates success or -EINVAL on failure
750 int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
752 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
753 struct device *dev = &adapter->pdev->dev;
758 /* do nothing if no DDP pools were allocated */
762 /* Extra buffer to be shared by all DDPs for HW work around */
763 buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_KERNEL);
767 dma = dma_map_single(dev, buffer, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE);
768 if (dma_mapping_error(dev, dma)) {
769 e_err(drv, "failed to map extra DDP buffer\n");
774 fcoe->extra_ddp_buffer = buffer;
775 fcoe->extra_ddp_buffer_dma = dma;
777 /* allocate pci pool for each cpu */
778 for_each_possible_cpu(cpu) {
779 int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu);
783 e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu);
784 ixgbe_free_fcoe_ddp_resources(adapter);
791 static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter)
793 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
795 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
798 fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool);
800 if (!fcoe->ddp_pool) {
801 e_err(drv, "failed to allocate percpu DDP resources\n");
805 adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
806 /* X550 has different DDP Max limit */
807 if (adapter->hw.mac.type == ixgbe_mac_X550)
808 adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX_X550 - 1;
813 static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter)
815 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
817 adapter->netdev->fcoe_ddp_xid = 0;
822 free_percpu(fcoe->ddp_pool);
823 fcoe->ddp_pool = NULL;
827 * ixgbe_fcoe_enable - turn on FCoE offload feature
828 * @netdev: the corresponding netdev
830 * Turns on FCoE offload feature in 82599.
832 * Returns : 0 indicates success or -EINVAL on failure
834 int ixgbe_fcoe_enable(struct net_device *netdev)
836 struct ixgbe_adapter *adapter = netdev_priv(netdev);
837 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
839 atomic_inc(&fcoe->refcnt);
841 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
844 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
847 e_info(drv, "Enabling FCoE offload features.\n");
849 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
850 e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n");
852 if (netif_running(netdev))
853 netdev->netdev_ops->ndo_stop(netdev);
855 /* Allocate per CPU memory to track DDP pools */
856 ixgbe_fcoe_ddp_enable(adapter);
858 /* enable FCoE and notify stack */
859 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
860 netdev->features |= NETIF_F_FCOE_MTU;
861 netdev_features_change(netdev);
863 /* release existing queues and reallocate them */
864 ixgbe_clear_interrupt_scheme(adapter);
865 ixgbe_init_interrupt_scheme(adapter);
867 if (netif_running(netdev))
868 netdev->netdev_ops->ndo_open(netdev);
874 * ixgbe_fcoe_disable - turn off FCoE offload feature
875 * @netdev: the corresponding netdev
877 * Turns off FCoE offload feature in 82599.
879 * Returns : 0 indicates success or -EINVAL on failure
881 int ixgbe_fcoe_disable(struct net_device *netdev)
883 struct ixgbe_adapter *adapter = netdev_priv(netdev);
885 if (!atomic_dec_and_test(&adapter->fcoe.refcnt))
888 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
891 e_info(drv, "Disabling FCoE offload features.\n");
892 if (netif_running(netdev))
893 netdev->netdev_ops->ndo_stop(netdev);
895 /* Free per CPU memory to track DDP pools */
896 ixgbe_fcoe_ddp_disable(adapter);
898 /* disable FCoE and notify stack */
899 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
900 netdev->features &= ~NETIF_F_FCOE_MTU;
902 netdev_features_change(netdev);
904 /* release existing queues and reallocate them */
905 ixgbe_clear_interrupt_scheme(adapter);
906 ixgbe_init_interrupt_scheme(adapter);
908 if (netif_running(netdev))
909 netdev->netdev_ops->ndo_open(netdev);
915 * ixgbe_fcoe_get_wwn - get world wide name for the node or the port
916 * @netdev : ixgbe adapter
917 * @wwn : the world wide name
918 * @type: the type of world wide name
920 * Returns the node or port world wide name if both the prefix and the san
921 * mac address are valid, then the wwn is formed based on the NAA-2 for
922 * IEEE Extended name identifier (ref. to T10 FC-LS Spec., Sec. 15.3).
924 * Returns : 0 on success
926 int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
929 struct ixgbe_adapter *adapter = netdev_priv(netdev);
930 struct ixgbe_mac_info *mac = &adapter->hw.mac;
933 case NETDEV_FCOE_WWNN:
934 prefix = mac->wwnn_prefix;
936 case NETDEV_FCOE_WWPN:
937 prefix = mac->wwpn_prefix;
943 if ((prefix != 0xffff) &&
944 is_valid_ether_addr(mac->san_addr)) {
945 *wwn = ((u64) prefix << 48) |
946 ((u64) mac->san_addr[0] << 40) |
947 ((u64) mac->san_addr[1] << 32) |
948 ((u64) mac->san_addr[2] << 24) |
949 ((u64) mac->san_addr[3] << 16) |
950 ((u64) mac->san_addr[4] << 8) |
951 ((u64) mac->san_addr[5]);
958 * ixgbe_fcoe_get_hbainfo - get FCoE HBA information
959 * @netdev : ixgbe adapter
960 * @info : HBA information
962 * Returns ixgbe HBA information
964 * Returns : 0 on success
966 int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
967 struct netdev_fcoe_hbainfo *info)
969 struct ixgbe_adapter *adapter = netdev_priv(netdev);
970 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 pos = pci_find_ext_capability(adapter->pdev, PCI_EXT_CAP_ID_DSN);
991 for (i = 0; i < 8; i++)
992 pci_read_config_byte(adapter->pdev, pos + i, &buf[i]);
994 snprintf(info->serial_number, sizeof(info->serial_number),
995 "%02X%02X%02X%02X%02X%02X%02X%02X",
996 buf[7], buf[6], buf[5], buf[4],
997 buf[3], buf[2], buf[1], buf[0]);
999 snprintf(info->serial_number, sizeof(info->serial_number),
1002 /* Hardware Version */
1003 snprintf(info->hardware_version,
1004 sizeof(info->hardware_version),
1005 "Rev %d", hw->revision_id);
1006 /* Driver Name/Version */
1007 snprintf(info->driver_version,
1008 sizeof(info->driver_version),
1011 ixgbe_driver_version);
1012 /* Firmware Version */
1013 strlcpy(info->firmware_version, adapter->eeprom_id,
1014 sizeof(info->firmware_version));
1017 if (hw->mac.type == ixgbe_mac_82599EB) {
1018 snprintf(info->model,
1019 sizeof(info->model),
1021 } else if (hw->mac.type == ixgbe_mac_X550) {
1022 snprintf(info->model,
1023 sizeof(info->model),
1026 snprintf(info->model,
1027 sizeof(info->model),
1031 /* Model Description */
1032 snprintf(info->model_description,
1033 sizeof(info->model_description),
1035 ixgbe_default_device_descr);
1041 * ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to
1042 * @adapter: pointer to the device adapter structure
1044 * Return : TC that FCoE is mapped to
1046 u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter)
1048 #ifdef CONFIG_IXGBE_DCB
1049 return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up);