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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4#include "ixgbe.h"
5#include <linux/if_ether.h>
6#include <linux/gfp.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>
15
16/**
17 * ixgbe_fcoe_clear_ddp - clear the given ddp context
18 * @ddp: ptr to the ixgbe_fcoe_ddp
19 *
20 * Returns : none
21 *
22 */
23static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp)
24{
25 ddp->len = 0;
26 ddp->err = 1;
27 ddp->udl = NULL;
28 ddp->udp = 0UL;
29 ddp->sgl = NULL;
30 ddp->sgc = 0;
31}
32
33/**
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
37 *
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.
41 *
42 * Returns : data length already ddp-ed in bytes
43 */
44int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
45{
46 int len;
47 struct ixgbe_fcoe *fcoe;
48 struct ixgbe_adapter *adapter;
49 struct ixgbe_fcoe_ddp *ddp;
50 struct ixgbe_hw *hw;
51 u32 fcbuff;
52
53 if (!netdev)
54 return 0;
55
56 if (xid >= netdev->fcoe_ddp_xid)
57 return 0;
58
59 adapter = netdev_priv(netdev);
60 fcoe = &adapter->fcoe;
61 ddp = &fcoe->ddp[xid];
62 if (!ddp->udl)
63 return 0;
64
65 hw = &adapter->hw;
66 len = ddp->len;
67 /* if no error then skip ddp context invalidation */
68 if (!ddp->err)
69 goto skip_ddpinv;
70
71 if (hw->mac.type == ixgbe_mac_X550) {
72 /* X550 does not require DDP FCoE lock */
73
74 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), 0);
75 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid),
76 (xid | IXGBE_FCFLTRW_WE));
77
78 /* program FCBUFF */
79 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), 0);
80
81 /* program FCDMARW */
82 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
83 (xid | IXGBE_FCDMARW_WE));
84
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));
89 } else {
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));
98
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);
104 }
105
106 if (fcbuff & IXGBE_FCBUFF_VALID)
107 usleep_range(100, 150);
108
109skip_ddpinv:
110 if (ddp->sgl)
111 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc,
112 DMA_FROM_DEVICE);
113 if (ddp->pool) {
114 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
115 ddp->pool = NULL;
116 }
117
118 ixgbe_fcoe_clear_ddp(ddp);
119
120 return len;
121}
122
123/**
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
130 *
131 * Returns : 1 for success and 0 for no ddp
132 */
133static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
134 struct scatterlist *sgl, unsigned int sgc,
135 int target_mode)
136{
137 struct ixgbe_adapter *adapter;
138 struct ixgbe_hw *hw;
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;
144 unsigned int len;
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;
151 dma_addr_t addr = 0;
152
153 if (!netdev || !sgl)
154 return 0;
155
156 adapter = netdev_priv(netdev);
157 if (xid >= netdev->fcoe_ddp_xid) {
158 e_warn(drv, "xid=0x%x out-of-range\n", xid);
159 return 0;
160 }
161
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))
165 return 0;
166
167 fcoe = &adapter->fcoe;
168 ddp = &fcoe->ddp[xid];
169 if (ddp->sgl) {
170 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
171 xid, ddp->sgl, ddp->sgc);
172 return 0;
173 }
174 ixgbe_fcoe_clear_ddp(ddp);
175
176
177 if (!fcoe->ddp_pool) {
178 e_warn(drv, "No ddp_pool resources allocated\n");
179 return 0;
180 }
181
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);
185 goto out_noddp;
186 }
187
188 /* setup dma from scsi command sgl */
189 dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
190 if (dmacount == 0) {
191 e_err(drv, "xid 0x%x DMA map error\n", xid);
192 goto out_noddp;
193 }
194
195 /* alloc the udl from per cpu ddp pool */
196 ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp);
197 if (!ddp->udl) {
198 e_err(drv, "failed allocated ddp context\n");
199 goto out_noddp_unmap;
200 }
201 ddp->pool = ddp_pool->pool;
202 ddp->sgl = sgl;
203 ddp->sgc = sgc;
204
205 j = 0;
206 for_each_sg(sgl, sg, dmacount, i) {
207 addr = sg_dma_address(sg);
208 len = sg_dma_len(sg);
209 while (len) {
210 /* max number of buffers allowed in one DDP context */
211 if (j >= IXGBE_BUFFCNT_MAX) {
212 ddp_pool->noddp++;
213 goto out_noddp_free;
214 }
215
216 /* get the offset of length of current buffer */
217 thisoff = addr & ((dma_addr_t)bufflen - 1);
218 thislen = min((bufflen - thisoff), len);
219 /*
220 * all but the 1st buffer (j == 0)
221 * must be aligned on bufflen
222 */
223 if ((j != 0) && (thisoff))
224 goto out_noddp_free;
225 /*
226 * all but the last buffer
227 * ((i == (dmacount - 1)) && (thislen == len))
228 * must end at bufflen
229 */
230 if (((i != (dmacount - 1)) || (thislen != len))
231 && ((thislen + thisoff) != bufflen))
232 goto out_noddp_free;
233
234 ddp->udl[j] = (u64)(addr - thisoff);
235 /* only the first buffer may have none-zero offset */
236 if (j == 0)
237 firstoff = thisoff;
238 len -= thislen;
239 addr += thislen;
240 j++;
241 }
242 }
243 /* only the last buffer may have non-full bufflen */
244 lastsize = thisoff + thislen;
245
246 /*
247 * lastsize can not be buffer len.
248 * If it is then adding another buffer with lastsize = 1.
249 */
250 if (lastsize == bufflen) {
251 if (j >= IXGBE_BUFFCNT_MAX) {
252 ddp_pool->noddp_ext_buff++;
253 goto out_noddp_free;
254 }
255
256 ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma);
257 j++;
258 lastsize = 1;
259 }
260 put_cpu();
261
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 */
266 if (target_mode)
267 fcbuff |= (IXGBE_FCBUFF_WRCONTX);
268 fcbuff |= (IXGBE_FCBUFF_VALID);
269
270 fcdmarw = xid;
271 fcdmarw |= IXGBE_FCDMARW_WE;
272 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT);
273
274 fcfltrw = xid;
275 fcfltrw |= IXGBE_FCFLTRW_WE;
276
277 /* program DMA context */
278 hw = &adapter->hw;
279
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);
287 }
288
289 if (hw->mac.type == ixgbe_mac_X550) {
290 /* X550 does not require DDP lock */
291
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);
301 } else {
302 /* DDP lock for indirect DDP context access */
303 spin_lock_bh(&fcoe->lock);
304
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);
313
314 spin_unlock_bh(&fcoe->lock);
315 }
316
317 return 1;
318
319out_noddp_free:
320 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
321 ixgbe_fcoe_clear_ddp(ddp);
322
323out_noddp_unmap:
324 dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
325out_noddp:
326 put_cpu();
327 return 0;
328}
329
330/**
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
336 *
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.
341 *
342 * Returns : 1 for success and 0 for no ddp
343 */
344int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
345 struct scatterlist *sgl, unsigned int sgc)
346{
347 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0);
348}
349
350/**
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
356 *
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.
362 *
363 * Returns : 1 for success and 0 for no ddp
364 */
365int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid,
366 struct scatterlist *sgl, unsigned int sgc)
367{
368 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1);
369}
370
371/**
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
376 *
377 * This checks ddp status.
378 *
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
381 * being ddped.
382 */
383int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
384 union ixgbe_adv_rx_desc *rx_desc,
385 struct sk_buff *skb)
386{
387 int rc = -EINVAL;
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);
393 __le32 ddp_err;
394 int ddp_max;
395 u32 fctl;
396 u16 xid;
397
398 if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC))
399 skb->ip_summed = CHECKSUM_NONE;
400 else
401 skb->ip_summed = CHECKSUM_UNNECESSARY;
402
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));
406 else
407 fh = (struct fc_frame_header *)(skb->data +
408 sizeof(struct fcoe_hdr));
409
410 fctl = ntoh24(fh->fh_f_ctl);
411 if (fctl & FC_FC_EX_CTX)
412 xid = be16_to_cpu(fh->fh_ox_id);
413 else
414 xid = be16_to_cpu(fh->fh_rx_id);
415
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;
420 if (xid >= ddp_max)
421 return -EINVAL;
422
423 fcoe = &adapter->fcoe;
424 ddp = &fcoe->ddp[xid];
425 if (!ddp->udl)
426 return -EINVAL;
427
428 ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE |
429 IXGBE_RXDADV_ERR_FCERR);
430 if (ddp_err)
431 return -EINVAL;
432
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);
438 rc = 0;
439 break;
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;
445 ddp->sgl = NULL;
446 ddp->sgc = 0;
447 fallthrough;
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);
452 if (ddp->len)
453 rc = ddp->len;
454 break;
455 /* no match will return as an error */
456 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH):
457 default:
458 break;
459 }
460
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.
467 */
468 if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) &&
469 (fctl & FC_FC_END_SEQ)) {
470 skb_linearize(skb);
471 crc = skb_put(skb, sizeof(*crc));
472 crc->fcoe_eof = FC_EOF_T;
473 }
474
475 return rc;
476}
477
478/**
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
483 *
484 * This sets up large send offload for FCoE
485 *
486 * Returns : 0 indicates success, < 0 for error
487 */
488int ixgbe_fso(struct ixgbe_ring *tx_ring,
489 struct ixgbe_tx_buffer *first,
490 u8 *hdr_len)
491{
492 struct sk_buff *skb = first->skb;
493 struct fc_frame_header *fh;
494 u32 vlan_macip_lens;
495 u32 fcoe_sof_eof = 0;
496 u32 mss_l4len_idx;
497 u32 type_tucmd = IXGBE_ADVTXT_TUCMD_FCOE;
498 u8 sof, eof;
499
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);
503 return -EINVAL;
504 }
505
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));
510
511 /* sets up SOF and ORIS */
512 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof;
513 switch (sof) {
514 case FC_SOF_I2:
515 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS;
516 break;
517 case FC_SOF_I3:
518 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF |
519 IXGBE_ADVTXD_FCOEF_ORIS;
520 break;
521 case FC_SOF_N2:
522 break;
523 case FC_SOF_N3:
524 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF;
525 break;
526 default:
527 dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof);
528 return -EINVAL;
529 }
530
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 */
534 switch (eof) {
535 case FC_EOF_N:
536 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
537 break;
538 case FC_EOF_T:
539 /* lso needs ORIE */
540 if (skb_is_gso(skb))
541 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N |
542 IXGBE_ADVTXD_FCOEF_ORIE;
543 else
544 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T;
545 break;
546 case FC_EOF_NI:
547 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI;
548 break;
549 case FC_EOF_A:
550 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A;
551 break;
552 default:
553 dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof);
554 return -EINVAL;
555 }
556
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;
561
562 /* include trailer in headlen as it is replicated per frame */
563 *hdr_len = sizeof(struct fcoe_crc_eof);
564
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;
576 }
577
578 /* set flag indicating FCOE to ixgbe_tx_map call */
579 first->tx_flags |= IXGBE_TX_FLAGS_FCOE | IXGBE_TX_FLAGS_CC;
580
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;
583
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;
590
591 /* write context desc */
592 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof,
593 type_tucmd, mss_l4len_idx);
594
595 return 0;
596}
597
598static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu)
599{
600 struct ixgbe_fcoe_ddp_pool *ddp_pool;
601
602 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
603 dma_pool_destroy(ddp_pool->pool);
604 ddp_pool->pool = NULL;
605}
606
607static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe,
608 struct device *dev,
609 unsigned int cpu)
610{
611 struct ixgbe_fcoe_ddp_pool *ddp_pool;
612 struct dma_pool *pool;
613 char pool_name[32];
614
615 snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%u", cpu);
616
617 pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX,
618 IXGBE_FCPTR_ALIGN, PAGE_SIZE);
619 if (!pool)
620 return -ENOMEM;
621
622 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
623 ddp_pool->pool = pool;
624 ddp_pool->noddp = 0;
625 ddp_pool->noddp_ext_buff = 0;
626
627 return 0;
628}
629
630/**
631 * ixgbe_configure_fcoe - configures registers for fcoe at start
632 * @adapter: ptr to ixgbe adapter
633 *
634 * This sets up FCoE related registers
635 *
636 * Returns : none
637 */
638void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
639{
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;
643 int fcreta_size;
644 u32 etqf;
645
646 /* Minimal functionality for FCoE requires at least CRC offloads */
647 if (!(adapter->netdev->features & NETIF_F_FCOE_CRC))
648 return;
649
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;
655 }
656 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf);
657 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0);
658
659 /* leave registers un-configured if FCoE is disabled */
660 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
661 return;
662
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;
667
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) %
671 fcoe->indices);
672 fcoe_q_h = adapter->rx_ring[fcoe_i_h]->reg_idx;
673 fcoe_q_h = FIELD_PREP(IXGBE_FCRETA_ENTRY_HIGH_MASK,
674 fcoe_q_h);
675 }
676
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;
680 fcoe_q |= fcoe_q_h;
681 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
682 }
683 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA);
684
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;
690 }
691 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf);
692
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));
698
699 /* Configure FCoE Rx control */
700 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
701 IXGBE_FCRXCTRL_FCCRCBO |
702 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
703}
704
705/**
706 * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources
707 * @adapter : ixgbe adapter
708 *
709 * Cleans up outstanding ddp context resources
710 *
711 * Returns : none
712 */
713void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
714{
715 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
716 int cpu, i, ddp_max;
717
718 /* do nothing if no DDP pools were allocated */
719 if (!fcoe->ddp_pool)
720 return;
721
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;
726
727 for (i = 0; i < ddp_max; i++)
728 ixgbe_fcoe_ddp_put(adapter->netdev, i);
729
730 for_each_possible_cpu(cpu)
731 ixgbe_fcoe_dma_pool_free(fcoe, cpu);
732
733 dma_unmap_single(&adapter->pdev->dev,
734 fcoe->extra_ddp_buffer_dma,
735 IXGBE_FCBUFF_MIN,
736 DMA_FROM_DEVICE);
737 kfree(fcoe->extra_ddp_buffer);
738
739 fcoe->extra_ddp_buffer = NULL;
740 fcoe->extra_ddp_buffer_dma = 0;
741}
742
743/**
744 * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources
745 * @adapter: ixgbe adapter
746 *
747 * Sets up ddp context resouces
748 *
749 * Returns : 0 indicates success or -EINVAL on failure
750 */
751int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
752{
753 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
754 struct device *dev = &adapter->pdev->dev;
755 void *buffer;
756 dma_addr_t dma;
757 unsigned int cpu;
758
759 /* do nothing if no DDP pools were allocated */
760 if (!fcoe->ddp_pool)
761 return 0;
762
763 /* Extra buffer to be shared by all DDPs for HW work around */
764 buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_KERNEL);
765 if (!buffer)
766 return -ENOMEM;
767
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");
771 kfree(buffer);
772 return -ENOMEM;
773 }
774
775 fcoe->extra_ddp_buffer = buffer;
776 fcoe->extra_ddp_buffer_dma = dma;
777
778 /* allocate pci pool for each cpu */
779 for_each_possible_cpu(cpu) {
780 int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu);
781 if (!err)
782 continue;
783
784 e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu);
785 ixgbe_free_fcoe_ddp_resources(adapter);
786 return -ENOMEM;
787 }
788
789 return 0;
790}
791
792static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter)
793{
794 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
795
796 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
797 return -EINVAL;
798
799 fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool);
800
801 if (!fcoe->ddp_pool) {
802 e_err(drv, "failed to allocate percpu DDP resources\n");
803 return -ENOMEM;
804 }
805
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;
810
811 return 0;
812}
813
814static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter)
815{
816 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
817
818 adapter->netdev->fcoe_ddp_xid = 0;
819
820 if (!fcoe->ddp_pool)
821 return;
822
823 free_percpu(fcoe->ddp_pool);
824 fcoe->ddp_pool = NULL;
825}
826
827/**
828 * ixgbe_fcoe_enable - turn on FCoE offload feature
829 * @netdev: the corresponding netdev
830 *
831 * Turns on FCoE offload feature in 82599.
832 *
833 * Returns : 0 indicates success or -EINVAL on failure
834 */
835int ixgbe_fcoe_enable(struct net_device *netdev)
836{
837 struct ixgbe_adapter *adapter = netdev_priv(netdev);
838 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
839
840 atomic_inc(&fcoe->refcnt);
841
842 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
843 return -EINVAL;
844
845 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
846 return -EINVAL;
847
848 e_info(drv, "Enabling FCoE offload features.\n");
849
850 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
851 e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n");
852
853 if (netif_running(netdev))
854 netdev->netdev_ops->ndo_stop(netdev);
855
856 /* Allocate per CPU memory to track DDP pools */
857 ixgbe_fcoe_ddp_enable(adapter);
858
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);
863
864 /* release existing queues and reallocate them */
865 ixgbe_clear_interrupt_scheme(adapter);
866 ixgbe_init_interrupt_scheme(adapter);
867
868 if (netif_running(netdev))
869 netdev->netdev_ops->ndo_open(netdev);
870
871 return 0;
872}
873
874/**
875 * ixgbe_fcoe_disable - turn off FCoE offload feature
876 * @netdev: the corresponding netdev
877 *
878 * Turns off FCoE offload feature in 82599.
879 *
880 * Returns : 0 indicates success or -EINVAL on failure
881 */
882int ixgbe_fcoe_disable(struct net_device *netdev)
883{
884 struct ixgbe_adapter *adapter = netdev_priv(netdev);
885
886 if (!atomic_dec_and_test(&adapter->fcoe.refcnt))
887 return -EINVAL;
888
889 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
890 return -EINVAL;
891
892 e_info(drv, "Disabling FCoE offload features.\n");
893 if (netif_running(netdev))
894 netdev->netdev_ops->ndo_stop(netdev);
895
896 /* Free per CPU memory to track DDP pools */
897 ixgbe_fcoe_ddp_disable(adapter);
898
899 /* disable FCoE and notify stack */
900 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
901 netdev->features &= ~NETIF_F_FCOE_MTU;
902
903 netdev_features_change(netdev);
904
905 /* release existing queues and reallocate them */
906 ixgbe_clear_interrupt_scheme(adapter);
907 ixgbe_init_interrupt_scheme(adapter);
908
909 if (netif_running(netdev))
910 netdev->netdev_ops->ndo_open(netdev);
911
912 return 0;
913}
914
915/**
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
920 *
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).
924 *
925 * Returns : 0 on success
926 */
927int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
928{
929 u16 prefix = 0xffff;
930 struct ixgbe_adapter *adapter = netdev_priv(netdev);
931 struct ixgbe_mac_info *mac = &adapter->hw.mac;
932
933 switch (type) {
934 case NETDEV_FCOE_WWNN:
935 prefix = mac->wwnn_prefix;
936 break;
937 case NETDEV_FCOE_WWPN:
938 prefix = mac->wwpn_prefix;
939 break;
940 default:
941 break;
942 }
943
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]);
953 return 0;
954 }
955 return -EINVAL;
956}
957
958/**
959 * ixgbe_fcoe_get_hbainfo - get FCoE HBA information
960 * @netdev : ixgbe adapter
961 * @info : HBA information
962 *
963 * Returns ixgbe HBA information
964 *
965 * Returns : 0 on success
966 */
967int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
968 struct netdev_fcoe_hbainfo *info)
969{
970 struct ixgbe_adapter *adapter = netdev_priv(netdev);
971 struct ixgbe_hw *hw = &adapter->hw;
972 u64 dsn;
973
974 if (!info)
975 return -EINVAL;
976
977 /* Don't return information on unsupported devices */
978 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
979 return -EINVAL;
980
981 /* Manufacturer */
982 snprintf(info->manufacturer, sizeof(info->manufacturer),
983 "Intel Corporation");
984
985 /* Serial Number */
986
987 /* Get the PCI-e Device Serial Number Capability */
988 dsn = pci_get_dsn(adapter->pdev);
989 if (dsn)
990 snprintf(info->serial_number, sizeof(info->serial_number),
991 "%016llX", dsn);
992 else
993 snprintf(info->serial_number, sizeof(info->serial_number),
994 "Unknown");
995
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),
1003 "%s v%s",
1004 ixgbe_driver_name,
1005 UTS_RELEASE);
1006 /* Firmware Version */
1007 strscpy(info->firmware_version, adapter->eeprom_id,
1008 sizeof(info->firmware_version));
1009
1010 /* Model */
1011 if (hw->mac.type == ixgbe_mac_82599EB) {
1012 snprintf(info->model,
1013 sizeof(info->model),
1014 "Intel 82599");
1015 } else if (hw->mac.type == ixgbe_mac_X550) {
1016 snprintf(info->model,
1017 sizeof(info->model),
1018 "Intel X550");
1019 } else {
1020 snprintf(info->model,
1021 sizeof(info->model),
1022 "Intel X540");
1023 }
1024
1025 /* Model Description */
1026 snprintf(info->model_description,
1027 sizeof(info->model_description),
1028 "%s",
1029 ixgbe_default_device_descr);
1030
1031 return 0;
1032}
1033
1034/**
1035 * ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to
1036 * @adapter: pointer to the device adapter structure
1037 *
1038 * Return : TC that FCoE is mapped to
1039 */
1040u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter)
1041{
1042#ifdef CONFIG_IXGBE_DCB
1043 return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up);
1044#else
1045 return 0;
1046#endif
1047}
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4#include "ixgbe.h"
5#include <linux/if_ether.h>
6#include <linux/gfp.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>
14
15/**
16 * ixgbe_fcoe_clear_ddp - clear the given ddp context
17 * @ddp: ptr to the ixgbe_fcoe_ddp
18 *
19 * Returns : none
20 *
21 */
22static inline void ixgbe_fcoe_clear_ddp(struct ixgbe_fcoe_ddp *ddp)
23{
24 ddp->len = 0;
25 ddp->err = 1;
26 ddp->udl = NULL;
27 ddp->udp = 0UL;
28 ddp->sgl = NULL;
29 ddp->sgc = 0;
30}
31
32/**
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
36 *
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.
40 *
41 * Returns : data length already ddp-ed in bytes
42 */
43int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid)
44{
45 int len;
46 struct ixgbe_fcoe *fcoe;
47 struct ixgbe_adapter *adapter;
48 struct ixgbe_fcoe_ddp *ddp;
49 struct ixgbe_hw *hw;
50 u32 fcbuff;
51
52 if (!netdev)
53 return 0;
54
55 if (xid >= netdev->fcoe_ddp_xid)
56 return 0;
57
58 adapter = netdev_priv(netdev);
59 fcoe = &adapter->fcoe;
60 ddp = &fcoe->ddp[xid];
61 if (!ddp->udl)
62 return 0;
63
64 hw = &adapter->hw;
65 len = ddp->len;
66 /* if no error then skip ddp context invalidation */
67 if (!ddp->err)
68 goto skip_ddpinv;
69
70 if (hw->mac.type == ixgbe_mac_X550) {
71 /* X550 does not require DDP FCoE lock */
72
73 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(0, xid), 0);
74 IXGBE_WRITE_REG(hw, IXGBE_FCDFC(3, xid),
75 (xid | IXGBE_FCFLTRW_WE));
76
77 /* program FCBUFF */
78 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(2, xid), 0);
79
80 /* program FCDMARW */
81 IXGBE_WRITE_REG(hw, IXGBE_FCDDC(3, xid),
82 (xid | IXGBE_FCDMARW_WE));
83
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));
88 } else {
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));
97
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);
103 }
104
105 if (fcbuff & IXGBE_FCBUFF_VALID)
106 usleep_range(100, 150);
107
108skip_ddpinv:
109 if (ddp->sgl)
110 dma_unmap_sg(&adapter->pdev->dev, ddp->sgl, ddp->sgc,
111 DMA_FROM_DEVICE);
112 if (ddp->pool) {
113 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
114 ddp->pool = NULL;
115 }
116
117 ixgbe_fcoe_clear_ddp(ddp);
118
119 return len;
120}
121
122/**
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
129 *
130 * Returns : 1 for success and 0 for no ddp
131 */
132static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
133 struct scatterlist *sgl, unsigned int sgc,
134 int target_mode)
135{
136 struct ixgbe_adapter *adapter;
137 struct ixgbe_hw *hw;
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;
143 unsigned int len;
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;
150 dma_addr_t addr = 0;
151
152 if (!netdev || !sgl)
153 return 0;
154
155 adapter = netdev_priv(netdev);
156 if (xid >= netdev->fcoe_ddp_xid) {
157 e_warn(drv, "xid=0x%x out-of-range\n", xid);
158 return 0;
159 }
160
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))
164 return 0;
165
166 fcoe = &adapter->fcoe;
167 ddp = &fcoe->ddp[xid];
168 if (ddp->sgl) {
169 e_err(drv, "xid 0x%x w/ non-null sgl=%p nents=%d\n",
170 xid, ddp->sgl, ddp->sgc);
171 return 0;
172 }
173 ixgbe_fcoe_clear_ddp(ddp);
174
175
176 if (!fcoe->ddp_pool) {
177 e_warn(drv, "No ddp_pool resources allocated\n");
178 return 0;
179 }
180
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);
184 goto out_noddp;
185 }
186
187 /* setup dma from scsi command sgl */
188 dmacount = dma_map_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
189 if (dmacount == 0) {
190 e_err(drv, "xid 0x%x DMA map error\n", xid);
191 goto out_noddp;
192 }
193
194 /* alloc the udl from per cpu ddp pool */
195 ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_KERNEL, &ddp->udp);
196 if (!ddp->udl) {
197 e_err(drv, "failed allocated ddp context\n");
198 goto out_noddp_unmap;
199 }
200 ddp->pool = ddp_pool->pool;
201 ddp->sgl = sgl;
202 ddp->sgc = sgc;
203
204 j = 0;
205 for_each_sg(sgl, sg, dmacount, i) {
206 addr = sg_dma_address(sg);
207 len = sg_dma_len(sg);
208 while (len) {
209 /* max number of buffers allowed in one DDP context */
210 if (j >= IXGBE_BUFFCNT_MAX) {
211 ddp_pool->noddp++;
212 goto out_noddp_free;
213 }
214
215 /* get the offset of length of current buffer */
216 thisoff = addr & ((dma_addr_t)bufflen - 1);
217 thislen = min((bufflen - thisoff), len);
218 /*
219 * all but the 1st buffer (j == 0)
220 * must be aligned on bufflen
221 */
222 if ((j != 0) && (thisoff))
223 goto out_noddp_free;
224 /*
225 * all but the last buffer
226 * ((i == (dmacount - 1)) && (thislen == len))
227 * must end at bufflen
228 */
229 if (((i != (dmacount - 1)) || (thislen != len))
230 && ((thislen + thisoff) != bufflen))
231 goto out_noddp_free;
232
233 ddp->udl[j] = (u64)(addr - thisoff);
234 /* only the first buffer may have none-zero offset */
235 if (j == 0)
236 firstoff = thisoff;
237 len -= thislen;
238 addr += thislen;
239 j++;
240 }
241 }
242 /* only the last buffer may have non-full bufflen */
243 lastsize = thisoff + thislen;
244
245 /*
246 * lastsize can not be buffer len.
247 * If it is then adding another buffer with lastsize = 1.
248 */
249 if (lastsize == bufflen) {
250 if (j >= IXGBE_BUFFCNT_MAX) {
251 ddp_pool->noddp_ext_buff++;
252 goto out_noddp_free;
253 }
254
255 ddp->udl[j] = (u64)(fcoe->extra_ddp_buffer_dma);
256 j++;
257 lastsize = 1;
258 }
259 put_cpu();
260
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 */
265 if (target_mode)
266 fcbuff |= (IXGBE_FCBUFF_WRCONTX);
267 fcbuff |= (IXGBE_FCBUFF_VALID);
268
269 fcdmarw = xid;
270 fcdmarw |= IXGBE_FCDMARW_WE;
271 fcdmarw |= (lastsize << IXGBE_FCDMARW_LASTSIZE_SHIFT);
272
273 fcfltrw = xid;
274 fcfltrw |= IXGBE_FCFLTRW_WE;
275
276 /* program DMA context */
277 hw = &adapter->hw;
278
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);
286 }
287
288 if (hw->mac.type == ixgbe_mac_X550) {
289 /* X550 does not require DDP lock */
290
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);
300 } else {
301 /* DDP lock for indirect DDP context access */
302 spin_lock_bh(&fcoe->lock);
303
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);
312
313 spin_unlock_bh(&fcoe->lock);
314 }
315
316 return 1;
317
318out_noddp_free:
319 dma_pool_free(ddp->pool, ddp->udl, ddp->udp);
320 ixgbe_fcoe_clear_ddp(ddp);
321
322out_noddp_unmap:
323 dma_unmap_sg(&adapter->pdev->dev, sgl, sgc, DMA_FROM_DEVICE);
324out_noddp:
325 put_cpu();
326 return 0;
327}
328
329/**
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
335 *
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.
340 *
341 * Returns : 1 for success and 0 for no ddp
342 */
343int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
344 struct scatterlist *sgl, unsigned int sgc)
345{
346 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 0);
347}
348
349/**
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
355 *
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.
361 *
362 * Returns : 1 for success and 0 for no ddp
363 */
364int ixgbe_fcoe_ddp_target(struct net_device *netdev, u16 xid,
365 struct scatterlist *sgl, unsigned int sgc)
366{
367 return ixgbe_fcoe_ddp_setup(netdev, xid, sgl, sgc, 1);
368}
369
370/**
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
375 *
376 * This checks ddp status.
377 *
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
380 * being ddped.
381 */
382int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
383 union ixgbe_adv_rx_desc *rx_desc,
384 struct sk_buff *skb)
385{
386 int rc = -EINVAL;
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);
392 __le32 ddp_err;
393 int ddp_max;
394 u32 fctl;
395 u16 xid;
396
397 if (fcerr == cpu_to_le32(IXGBE_FCERR_BADCRC))
398 skb->ip_summed = CHECKSUM_NONE;
399 else
400 skb->ip_summed = CHECKSUM_UNNECESSARY;
401
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));
405 else
406 fh = (struct fc_frame_header *)(skb->data +
407 sizeof(struct fcoe_hdr));
408
409 fctl = ntoh24(fh->fh_f_ctl);
410 if (fctl & FC_FC_EX_CTX)
411 xid = be16_to_cpu(fh->fh_ox_id);
412 else
413 xid = be16_to_cpu(fh->fh_rx_id);
414
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;
419 if (xid >= ddp_max)
420 return -EINVAL;
421
422 fcoe = &adapter->fcoe;
423 ddp = &fcoe->ddp[xid];
424 if (!ddp->udl)
425 return -EINVAL;
426
427 ddp_err = ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FCEOFE |
428 IXGBE_RXDADV_ERR_FCERR);
429 if (ddp_err)
430 return -EINVAL;
431
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);
437 rc = 0;
438 break;
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;
444 ddp->sgl = NULL;
445 ddp->sgc = 0;
446 /* fall through */
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);
451 if (ddp->len)
452 rc = ddp->len;
453 break;
454 /* no match will return as an error */
455 case cpu_to_le32(IXGBE_RXDADV_STAT_FCSTAT_NOMTCH):
456 default:
457 break;
458 }
459
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.
466 */
467 if ((fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA) &&
468 (fctl & FC_FC_END_SEQ)) {
469 skb_linearize(skb);
470 crc = skb_put(skb, sizeof(*crc));
471 crc->fcoe_eof = FC_EOF_T;
472 }
473
474 return rc;
475}
476
477/**
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
482 *
483 * This sets up large send offload for FCoE
484 *
485 * Returns : 0 indicates success, < 0 for error
486 */
487int ixgbe_fso(struct ixgbe_ring *tx_ring,
488 struct ixgbe_tx_buffer *first,
489 u8 *hdr_len)
490{
491 struct sk_buff *skb = first->skb;
492 struct fc_frame_header *fh;
493 u32 vlan_macip_lens;
494 u32 fcoe_sof_eof = 0;
495 u32 mss_l4len_idx;
496 u32 type_tucmd = IXGBE_ADVTXT_TUCMD_FCOE;
497 u8 sof, eof;
498
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);
502 return -EINVAL;
503 }
504
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));
509
510 /* sets up SOF and ORIS */
511 sof = ((struct fcoe_hdr *)skb_network_header(skb))->fcoe_sof;
512 switch (sof) {
513 case FC_SOF_I2:
514 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_ORIS;
515 break;
516 case FC_SOF_I3:
517 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF |
518 IXGBE_ADVTXD_FCOEF_ORIS;
519 break;
520 case FC_SOF_N2:
521 break;
522 case FC_SOF_N3:
523 fcoe_sof_eof = IXGBE_ADVTXD_FCOEF_SOF;
524 break;
525 default:
526 dev_warn(tx_ring->dev, "unknown sof = 0x%x\n", sof);
527 return -EINVAL;
528 }
529
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 */
533 switch (eof) {
534 case FC_EOF_N:
535 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N;
536 break;
537 case FC_EOF_T:
538 /* lso needs ORIE */
539 if (skb_is_gso(skb))
540 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_N |
541 IXGBE_ADVTXD_FCOEF_ORIE;
542 else
543 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_T;
544 break;
545 case FC_EOF_NI:
546 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_NI;
547 break;
548 case FC_EOF_A:
549 fcoe_sof_eof |= IXGBE_ADVTXD_FCOEF_EOF_A;
550 break;
551 default:
552 dev_warn(tx_ring->dev, "unknown eof = 0x%x\n", eof);
553 return -EINVAL;
554 }
555
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;
560
561 /* include trailer in headlen as it is replicated per frame */
562 *hdr_len = sizeof(struct fcoe_crc_eof);
563
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;
575 }
576
577 /* set flag indicating FCOE to ixgbe_tx_map call */
578 first->tx_flags |= IXGBE_TX_FLAGS_FCOE | IXGBE_TX_FLAGS_CC;
579
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;
582
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;
589
590 /* write context desc */
591 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, fcoe_sof_eof,
592 type_tucmd, mss_l4len_idx);
593
594 return 0;
595}
596
597static void ixgbe_fcoe_dma_pool_free(struct ixgbe_fcoe *fcoe, unsigned int cpu)
598{
599 struct ixgbe_fcoe_ddp_pool *ddp_pool;
600
601 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
602 dma_pool_destroy(ddp_pool->pool);
603 ddp_pool->pool = NULL;
604}
605
606static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe,
607 struct device *dev,
608 unsigned int cpu)
609{
610 struct ixgbe_fcoe_ddp_pool *ddp_pool;
611 struct dma_pool *pool;
612 char pool_name[32];
613
614 snprintf(pool_name, 32, "ixgbe_fcoe_ddp_%u", cpu);
615
616 pool = dma_pool_create(pool_name, dev, IXGBE_FCPTR_MAX,
617 IXGBE_FCPTR_ALIGN, PAGE_SIZE);
618 if (!pool)
619 return -ENOMEM;
620
621 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
622 ddp_pool->pool = pool;
623 ddp_pool->noddp = 0;
624 ddp_pool->noddp_ext_buff = 0;
625
626 return 0;
627}
628
629/**
630 * ixgbe_configure_fcoe - configures registers for fcoe at start
631 * @adapter: ptr to ixgbe adapter
632 *
633 * This sets up FCoE related registers
634 *
635 * Returns : none
636 */
637void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
638{
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;
642 int fcreta_size;
643 u32 etqf;
644
645 /* Minimal functionality for FCoE requires at least CRC offloads */
646 if (!(adapter->netdev->features & NETIF_F_FCOE_CRC))
647 return;
648
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;
654 }
655 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FCOE), etqf);
656 IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FCOE), 0);
657
658 /* leave registers un-configured if FCoE is disabled */
659 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
660 return;
661
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;
666
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) %
670 fcoe->indices);
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;
674 }
675
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;
679 fcoe_q |= fcoe_q_h;
680 IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
681 }
682 IXGBE_WRITE_REG(hw, IXGBE_FCRECTL, IXGBE_FCRECTL_ENA);
683
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;
689 }
690 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf);
691
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));
697
698 /* Configure FCoE Rx control */
699 IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
700 IXGBE_FCRXCTRL_FCCRCBO |
701 (FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
702}
703
704/**
705 * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources
706 * @adapter : ixgbe adapter
707 *
708 * Cleans up outstanding ddp context resources
709 *
710 * Returns : none
711 */
712void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
713{
714 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
715 int cpu, i, ddp_max;
716
717 /* do nothing if no DDP pools were allocated */
718 if (!fcoe->ddp_pool)
719 return;
720
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;
725
726 for (i = 0; i < ddp_max; i++)
727 ixgbe_fcoe_ddp_put(adapter->netdev, i);
728
729 for_each_possible_cpu(cpu)
730 ixgbe_fcoe_dma_pool_free(fcoe, cpu);
731
732 dma_unmap_single(&adapter->pdev->dev,
733 fcoe->extra_ddp_buffer_dma,
734 IXGBE_FCBUFF_MIN,
735 DMA_FROM_DEVICE);
736 kfree(fcoe->extra_ddp_buffer);
737
738 fcoe->extra_ddp_buffer = NULL;
739 fcoe->extra_ddp_buffer_dma = 0;
740}
741
742/**
743 * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources
744 * @adapter: ixgbe adapter
745 *
746 * Sets up ddp context resouces
747 *
748 * Returns : 0 indicates success or -EINVAL on failure
749 */
750int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
751{
752 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
753 struct device *dev = &adapter->pdev->dev;
754 void *buffer;
755 dma_addr_t dma;
756 unsigned int cpu;
757
758 /* do nothing if no DDP pools were allocated */
759 if (!fcoe->ddp_pool)
760 return 0;
761
762 /* Extra buffer to be shared by all DDPs for HW work around */
763 buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_KERNEL);
764 if (!buffer)
765 return -ENOMEM;
766
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");
770 kfree(buffer);
771 return -ENOMEM;
772 }
773
774 fcoe->extra_ddp_buffer = buffer;
775 fcoe->extra_ddp_buffer_dma = dma;
776
777 /* allocate pci pool for each cpu */
778 for_each_possible_cpu(cpu) {
779 int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu);
780 if (!err)
781 continue;
782
783 e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu);
784 ixgbe_free_fcoe_ddp_resources(adapter);
785 return -ENOMEM;
786 }
787
788 return 0;
789}
790
791static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter)
792{
793 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
794
795 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
796 return -EINVAL;
797
798 fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool);
799
800 if (!fcoe->ddp_pool) {
801 e_err(drv, "failed to allocate percpu DDP resources\n");
802 return -ENOMEM;
803 }
804
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;
809
810 return 0;
811}
812
813static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter)
814{
815 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
816
817 adapter->netdev->fcoe_ddp_xid = 0;
818
819 if (!fcoe->ddp_pool)
820 return;
821
822 free_percpu(fcoe->ddp_pool);
823 fcoe->ddp_pool = NULL;
824}
825
826/**
827 * ixgbe_fcoe_enable - turn on FCoE offload feature
828 * @netdev: the corresponding netdev
829 *
830 * Turns on FCoE offload feature in 82599.
831 *
832 * Returns : 0 indicates success or -EINVAL on failure
833 */
834int ixgbe_fcoe_enable(struct net_device *netdev)
835{
836 struct ixgbe_adapter *adapter = netdev_priv(netdev);
837 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
838
839 atomic_inc(&fcoe->refcnt);
840
841 if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
842 return -EINVAL;
843
844 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
845 return -EINVAL;
846
847 e_info(drv, "Enabling FCoE offload features.\n");
848
849 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
850 e_warn(probe, "Enabling FCoE on PF will disable legacy VFs\n");
851
852 if (netif_running(netdev))
853 netdev->netdev_ops->ndo_stop(netdev);
854
855 /* Allocate per CPU memory to track DDP pools */
856 ixgbe_fcoe_ddp_enable(adapter);
857
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);
862
863 /* release existing queues and reallocate them */
864 ixgbe_clear_interrupt_scheme(adapter);
865 ixgbe_init_interrupt_scheme(adapter);
866
867 if (netif_running(netdev))
868 netdev->netdev_ops->ndo_open(netdev);
869
870 return 0;
871}
872
873/**
874 * ixgbe_fcoe_disable - turn off FCoE offload feature
875 * @netdev: the corresponding netdev
876 *
877 * Turns off FCoE offload feature in 82599.
878 *
879 * Returns : 0 indicates success or -EINVAL on failure
880 */
881int ixgbe_fcoe_disable(struct net_device *netdev)
882{
883 struct ixgbe_adapter *adapter = netdev_priv(netdev);
884
885 if (!atomic_dec_and_test(&adapter->fcoe.refcnt))
886 return -EINVAL;
887
888 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
889 return -EINVAL;
890
891 e_info(drv, "Disabling FCoE offload features.\n");
892 if (netif_running(netdev))
893 netdev->netdev_ops->ndo_stop(netdev);
894
895 /* Free per CPU memory to track DDP pools */
896 ixgbe_fcoe_ddp_disable(adapter);
897
898 /* disable FCoE and notify stack */
899 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
900 netdev->features &= ~NETIF_F_FCOE_MTU;
901
902 netdev_features_change(netdev);
903
904 /* release existing queues and reallocate them */
905 ixgbe_clear_interrupt_scheme(adapter);
906 ixgbe_init_interrupt_scheme(adapter);
907
908 if (netif_running(netdev))
909 netdev->netdev_ops->ndo_open(netdev);
910
911 return 0;
912}
913
914/**
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
919 *
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).
923 *
924 * Returns : 0 on success
925 */
926int ixgbe_fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
927{
928 u16 prefix = 0xffff;
929 struct ixgbe_adapter *adapter = netdev_priv(netdev);
930 struct ixgbe_mac_info *mac = &adapter->hw.mac;
931
932 switch (type) {
933 case NETDEV_FCOE_WWNN:
934 prefix = mac->wwnn_prefix;
935 break;
936 case NETDEV_FCOE_WWPN:
937 prefix = mac->wwpn_prefix;
938 break;
939 default:
940 break;
941 }
942
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]);
952 return 0;
953 }
954 return -EINVAL;
955}
956
957/**
958 * ixgbe_fcoe_get_hbainfo - get FCoE HBA information
959 * @netdev : ixgbe adapter
960 * @info : HBA information
961 *
962 * Returns ixgbe HBA information
963 *
964 * Returns : 0 on success
965 */
966int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
967 struct netdev_fcoe_hbainfo *info)
968{
969 struct ixgbe_adapter *adapter = netdev_priv(netdev);
970 struct ixgbe_hw *hw = &adapter->hw;
971 int i, pos;
972 u8 buf[8];
973
974 if (!info)
975 return -EINVAL;
976
977 /* Don't return information on unsupported devices */
978 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
979 return -EINVAL;
980
981 /* Manufacturer */
982 snprintf(info->manufacturer, sizeof(info->manufacturer),
983 "Intel Corporation");
984
985 /* Serial Number */
986
987 /* Get the PCI-e Device Serial Number Capability */
988 pos = pci_find_ext_capability(adapter->pdev, PCI_EXT_CAP_ID_DSN);
989 if (pos) {
990 pos += 4;
991 for (i = 0; i < 8; i++)
992 pci_read_config_byte(adapter->pdev, pos + i, &buf[i]);
993
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]);
998 } else
999 snprintf(info->serial_number, sizeof(info->serial_number),
1000 "Unknown");
1001
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),
1009 "%s v%s",
1010 ixgbe_driver_name,
1011 ixgbe_driver_version);
1012 /* Firmware Version */
1013 strlcpy(info->firmware_version, adapter->eeprom_id,
1014 sizeof(info->firmware_version));
1015
1016 /* Model */
1017 if (hw->mac.type == ixgbe_mac_82599EB) {
1018 snprintf(info->model,
1019 sizeof(info->model),
1020 "Intel 82599");
1021 } else if (hw->mac.type == ixgbe_mac_X550) {
1022 snprintf(info->model,
1023 sizeof(info->model),
1024 "Intel X550");
1025 } else {
1026 snprintf(info->model,
1027 sizeof(info->model),
1028 "Intel X540");
1029 }
1030
1031 /* Model Description */
1032 snprintf(info->model_description,
1033 sizeof(info->model_description),
1034 "%s",
1035 ixgbe_default_device_descr);
1036
1037 return 0;
1038}
1039
1040/**
1041 * ixgbe_fcoe_get_tc - get the current TC that fcoe is mapped to
1042 * @adapter: pointer to the device adapter structure
1043 *
1044 * Return : TC that FCoE is mapped to
1045 */
1046u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter)
1047{
1048#ifdef CONFIG_IXGBE_DCB
1049 return netdev_get_prio_tc_map(adapter->netdev, adapter->fcoe.up);
1050#else
1051 return 0;
1052#endif
1053}