?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / infiniband / hw / nes / nes_mgt.c
blobe96ffff61c3a631179baad3afaa710fcd5c6d6de
1 /*
2 * Copyright (c) 2006 - 2011 Intel-NE, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33
34 #include <linux/skbuff.h>
35 #include <linux/etherdevice.h>
36 #include <linux/kthread.h>
37 #include <linux/ip.h>
38 #include <linux/tcp.h>
39 #include <net/tcp.h>
40 #include "nes.h"
41 #include "nes_mgt.h"
42
43 atomic_t pau_qps_created;
44 atomic_t pau_qps_destroyed;
45
46 static void nes_replenish_mgt_rq(struct nes_vnic_mgt *mgtvnic)
47 {
48 unsigned long flags;
49 dma_addr_t bus_address;
50 struct sk_buff *skb;
51 struct nes_hw_nic_rq_wqe *nic_rqe;
52 struct nes_hw_mgt *nesmgt;
53 struct nes_device *nesdev;
54 struct nes_rskb_cb *cb;
55 u32 rx_wqes_posted = 0;
56
57 nesmgt = &mgtvnic->mgt;
58 nesdev = mgtvnic->nesvnic->nesdev;
59 spin_lock_irqsave(&nesmgt->rq_lock, flags);
60 if (nesmgt->replenishing_rq != 0) {
61 if (((nesmgt->rq_size - 1) == atomic_read(&mgtvnic->rx_skbs_needed)) &&
62 (atomic_read(&mgtvnic->rx_skb_timer_running) == 0)) {
63 atomic_set(&mgtvnic->rx_skb_timer_running, 1);
64 spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
65 mgtvnic->rq_wqes_timer.expires = jiffies + (HZ / 2); /* 1/2 second */
66 add_timer(&mgtvnic->rq_wqes_timer);
67 } else {
68 spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
69 }
70 return;
71 }
72 nesmgt->replenishing_rq = 1;
73 spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
74 do {
75 skb = dev_alloc_skb(mgtvnic->nesvnic->max_frame_size);
76 if (skb) {
77 skb->dev = mgtvnic->nesvnic->netdev;
78
79 bus_address = pci_map_single(nesdev->pcidev,
80 skb->data, mgtvnic->nesvnic->max_frame_size, PCI_DMA_FROMDEVICE);
81 cb = (struct nes_rskb_cb *)&skb->cb[0];
82 cb->busaddr = bus_address;
83 cb->maplen = mgtvnic->nesvnic->max_frame_size;
84
85 nic_rqe = &nesmgt->rq_vbase[mgtvnic->mgt.rq_head];
86 nic_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_1_0_IDX] =
87 cpu_to_le32(mgtvnic->nesvnic->max_frame_size);
88 nic_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_3_2_IDX] = 0;
89 nic_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_LOW_IDX] =
90 cpu_to_le32((u32)bus_address);
91 nic_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_HIGH_IDX] =
92 cpu_to_le32((u32)((u64)bus_address >> 32));
93 nesmgt->rx_skb[nesmgt->rq_head] = skb;
94 nesmgt->rq_head++;
95 nesmgt->rq_head &= nesmgt->rq_size - 1;
96 atomic_dec(&mgtvnic->rx_skbs_needed);
97 barrier();
98 if (++rx_wqes_posted == 255) {
99 nes_write32(nesdev->regs + NES_WQE_ALLOC, (rx_wqes_posted << 24) | nesmgt->qp_id);
100 rx_wqes_posted = 0;
101 }
102 } else {
103 spin_lock_irqsave(&nesmgt->rq_lock, flags);
104 if (((nesmgt->rq_size - 1) == atomic_read(&mgtvnic->rx_skbs_needed)) &&
105 (atomic_read(&mgtvnic->rx_skb_timer_running) == 0)) {
106 atomic_set(&mgtvnic->rx_skb_timer_running, 1);
107 spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
108 mgtvnic->rq_wqes_timer.expires = jiffies + (HZ / 2); /* 1/2 second */
109 add_timer(&mgtvnic->rq_wqes_timer);
110 } else {
111 spin_unlock_irqrestore(&nesmgt->rq_lock, flags);
112 }
113 break;
114 }
115 } while (atomic_read(&mgtvnic->rx_skbs_needed));
116 barrier();
117 if (rx_wqes_posted)
118 nes_write32(nesdev->regs + NES_WQE_ALLOC, (rx_wqes_posted << 24) | nesmgt->qp_id);
119 nesmgt->replenishing_rq = 0;
120 }
121
122 /**
123 * nes_mgt_rq_wqes_timeout
124 */
125 static void nes_mgt_rq_wqes_timeout(struct timer_list *t)
126 {
127 struct nes_vnic_mgt *mgtvnic = from_timer(mgtvnic, t,
128 rq_wqes_timer);
129
130 atomic_set(&mgtvnic->rx_skb_timer_running, 0);
131 if (atomic_read(&mgtvnic->rx_skbs_needed))
132 nes_replenish_mgt_rq(mgtvnic);
133 }
134
135 /**
136 * nes_mgt_free_skb - unmap and free skb
137 */
138 static void nes_mgt_free_skb(struct nes_device *nesdev, struct sk_buff *skb, u32 dir)
139 {
140 struct nes_rskb_cb *cb;
141
142 cb = (struct nes_rskb_cb *)&skb->cb[0];
143 pci_unmap_single(nesdev->pcidev, cb->busaddr, cb->maplen, dir);
144 cb->busaddr = 0;
145 dev_kfree_skb_any(skb);
146 }
147
148 /**
149 * nes_download_callback - handle download completions
150 */
151 static void nes_download_callback(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
152 {
153 struct pau_fpdu_info *fpdu_info = cqp_request->cqp_callback_pointer;
154 struct nes_qp *nesqp = fpdu_info->nesqp;
155 struct sk_buff *skb;
156 int i;
157
158 for (i = 0; i < fpdu_info->frag_cnt; i++) {
159 skb = fpdu_info->frags[i].skb;
160 if (fpdu_info->frags[i].cmplt) {
161 nes_mgt_free_skb(nesdev, skb, PCI_DMA_TODEVICE);
162 nes_rem_ref_cm_node(nesqp->cm_node);
163 }
164 }
165
166 if (fpdu_info->hdr_vbase)
167 pci_free_consistent(nesdev->pcidev, fpdu_info->hdr_len,
168 fpdu_info->hdr_vbase, fpdu_info->hdr_pbase);
169 kfree(fpdu_info);
170 }
171
172 /**
173 * nes_get_seq - Get the seq, ack_seq and window from the packet
174 */
175 static u32 nes_get_seq(struct sk_buff *skb, u32 *ack, u16 *wnd, u32 *fin_rcvd, u32 *rst_rcvd)
176 {
177 struct nes_rskb_cb *cb = (struct nes_rskb_cb *)&skb->cb[0];
178 struct iphdr *iph = (struct iphdr *)(cb->data_start + ETH_HLEN);
179 struct tcphdr *tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
180
181 *ack = be32_to_cpu(tcph->ack_seq);
182 *wnd = be16_to_cpu(tcph->window);
183 *fin_rcvd = tcph->fin;
184 *rst_rcvd = tcph->rst;
185 return be32_to_cpu(tcph->seq);
186 }
187
188 /**
189 * nes_get_next_skb - Get the next skb based on where current skb is in the queue
190 */
191 static struct sk_buff *nes_get_next_skb(struct nes_device *nesdev, struct nes_qp *nesqp,
192 struct sk_buff *skb, u32 nextseq, u32 *ack,
193 u16 *wnd, u32 *fin_rcvd, u32 *rst_rcvd)
194 {
195 u32 seq;
196 bool processacks;
197 struct sk_buff *old_skb;
198
199 if (skb) {
200 /* Continue processing fpdu */
201 skb = skb_peek_next(skb, &nesqp->pau_list);
202 if (!skb)
203 goto out;
204 processacks = false;
205 } else {
206 /* Starting a new one */
207 if (skb_queue_empty(&nesqp->pau_list))
208 goto out;
209 skb = skb_peek(&nesqp->pau_list);
210 processacks = true;
211 }
212
213 while (1) {
214 if (skb_queue_empty(&nesqp->pau_list))
215 goto out;
216
217 seq = nes_get_seq(skb, ack, wnd, fin_rcvd, rst_rcvd);
218 if (seq == nextseq) {
219 if (skb->len || processacks)
220 break;
221 } else if (after(seq, nextseq)) {
222 goto out;
223 }
224
225 old_skb = skb;
226 skb = skb->next;
227 skb_unlink(old_skb, &nesqp->pau_list);
228 nes_mgt_free_skb(nesdev, old_skb, PCI_DMA_TODEVICE);
229 nes_rem_ref_cm_node(nesqp->cm_node);
230 if (skb == (struct sk_buff *)&nesqp->pau_list)
231 goto out;
232 }
233 return skb;
234
235 out:
236 return NULL;
237 }
238
239 /**
240 * get_fpdu_info - Find the next complete fpdu and return its fragments.
241 */
242 static int get_fpdu_info(struct nes_device *nesdev, struct nes_qp *nesqp,
243 struct pau_fpdu_info **pau_fpdu_info)
244 {
245 struct sk_buff *skb;
246 struct iphdr *iph;
247 struct tcphdr *tcph;
248 struct nes_rskb_cb *cb;
249 struct pau_fpdu_info *fpdu_info = NULL;
250 struct pau_fpdu_frag frags[MAX_FPDU_FRAGS];
251 u32 fpdu_len = 0;
252 u32 tmp_len;
253 int frag_cnt = 0;
254 u32 tot_len;
255 u32 frag_tot;
256 u32 ack;
257 u32 fin_rcvd;
258 u32 rst_rcvd;
259 u16 wnd;
260 int i;
261 int rc = 0;
262
263 *pau_fpdu_info = NULL;
264
265 skb = nes_get_next_skb(nesdev, nesqp, NULL, nesqp->pau_rcv_nxt, &ack, &wnd, &fin_rcvd, &rst_rcvd);
266 if (!skb)
267 goto out;
268
269 cb = (struct nes_rskb_cb *)&skb->cb[0];
270 if (skb->len) {
271 fpdu_len = be16_to_cpu(*(__be16 *) skb->data) + MPA_FRAMING;
272 fpdu_len = (fpdu_len + 3) & 0xfffffffc;
273 tmp_len = fpdu_len;
274
275 /* See if we have all of the fpdu */
276 frag_tot = 0;
277 memset(&frags, 0, sizeof frags);
278 for (i = 0; i < MAX_FPDU_FRAGS; i++) {
279 frags[i].physaddr = cb->busaddr;
280 frags[i].physaddr += skb->data - cb->data_start;
281 frags[i].frag_len = min(tmp_len, skb->len);
282 frags[i].skb = skb;
283 frags[i].cmplt = (skb->len == frags[i].frag_len);
284 frag_tot += frags[i].frag_len;
285 frag_cnt++;
286
287 tmp_len -= frags[i].frag_len;
288 if (tmp_len == 0)
289 break;
290
291 skb = nes_get_next_skb(nesdev, nesqp, skb,
292 nesqp->pau_rcv_nxt + frag_tot, &ack, &wnd, &fin_rcvd, &rst_rcvd);
293 if (!skb)
294 goto out;
295 if (rst_rcvd) {
296 /* rst received in the middle of fpdu */
297 for (; i >= 0; i--) {
298 skb_unlink(frags[i].skb, &nesqp->pau_list);
299 nes_mgt_free_skb(nesdev, frags[i].skb, PCI_DMA_TODEVICE);
300 }
301 cb = (struct nes_rskb_cb *)&skb->cb[0];
302 frags[0].physaddr = cb->busaddr;
303 frags[0].physaddr += skb->data - cb->data_start;
304 frags[0].frag_len = skb->len;
305 frags[0].skb = skb;
306 frags[0].cmplt = true;
307 frag_cnt = 1;
308 break;
309 }
310
311 cb = (struct nes_rskb_cb *)&skb->cb[0];
312 }
313 } else {
314 /* no data */
315 frags[0].physaddr = cb->busaddr;
316 frags[0].frag_len = 0;
317 frags[0].skb = skb;
318 frags[0].cmplt = true;
319 frag_cnt = 1;
320 }
321
322 /* Found one */
323 fpdu_info = kzalloc(sizeof(*fpdu_info), GFP_ATOMIC);
324 if (!fpdu_info) {
325 rc = -ENOMEM;
326 goto out;
327 }
328
329 fpdu_info->cqp_request = nes_get_cqp_request(nesdev);
330 if (fpdu_info->cqp_request == NULL) {
331 nes_debug(NES_DBG_PAU, "Failed to get a cqp_request.\n");
332 rc = -ENOMEM;
333 goto out;
334 }
335
336 cb = (struct nes_rskb_cb *)&frags[0].skb->cb[0];
337 iph = (struct iphdr *)(cb->data_start + ETH_HLEN);
338 tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
339 fpdu_info->hdr_len = (((unsigned char *)tcph) + 4 * (tcph->doff)) - cb->data_start;
340 fpdu_info->data_len = fpdu_len;
341 tot_len = fpdu_info->hdr_len + fpdu_len - ETH_HLEN;
342
343 if (frags[0].cmplt) {
344 fpdu_info->hdr_pbase = cb->busaddr;
345 fpdu_info->hdr_vbase = NULL;
346 } else {
347 fpdu_info->hdr_vbase = pci_alloc_consistent(nesdev->pcidev,
348 fpdu_info->hdr_len, &fpdu_info->hdr_pbase);
349 if (!fpdu_info->hdr_vbase) {
350 nes_debug(NES_DBG_PAU, "Unable to allocate memory for pau first frag\n");
351 rc = -ENOMEM;
352 goto out;
353 }
354
355 /* Copy hdrs, adjusting len and seqnum */
356 memcpy(fpdu_info->hdr_vbase, cb->data_start, fpdu_info->hdr_len);
357 iph = (struct iphdr *)(fpdu_info->hdr_vbase + ETH_HLEN);
358 tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
359 }
360
361 iph->tot_len = cpu_to_be16(tot_len);
362 iph->saddr = cpu_to_be32(0x7f000001);
363
364 tcph->seq = cpu_to_be32(nesqp->pau_rcv_nxt);
365 tcph->ack_seq = cpu_to_be32(ack);
366 tcph->window = cpu_to_be16(wnd);
367
368 nesqp->pau_rcv_nxt += fpdu_len + fin_rcvd;
369
370 memcpy(fpdu_info->frags, frags, sizeof(fpdu_info->frags));
371 fpdu_info->frag_cnt = frag_cnt;
372 fpdu_info->nesqp = nesqp;
373 *pau_fpdu_info = fpdu_info;
374
375 /* Update skb's for next pass */
376 for (i = 0; i < frag_cnt; i++) {
377 cb = (struct nes_rskb_cb *)&frags[i].skb->cb[0];
378 skb_pull(frags[i].skb, frags[i].frag_len);
379
380 if (frags[i].skb->len == 0) {
381 /* Pull skb off the list - it will be freed in the callback */
382 if (!skb_queue_empty(&nesqp->pau_list))
383 skb_unlink(frags[i].skb, &nesqp->pau_list);
384 } else {
385 /* Last skb still has data so update the seq */
386 iph = (struct iphdr *)(cb->data_start + ETH_HLEN);
387 tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
388 tcph->seq = cpu_to_be32(nesqp->pau_rcv_nxt);
389 }
390 }
391
392 out:
393 if (rc) {
394 if (fpdu_info) {
395 if (fpdu_info->cqp_request)
396 nes_put_cqp_request(nesdev, fpdu_info->cqp_request);
397 kfree(fpdu_info);
398 }
399 }
400 return rc;
401 }
402
403 /**
404 * forward_fpdu - send complete fpdus, one at a time
405 */
406 static int forward_fpdus(struct nes_vnic *nesvnic, struct nes_qp *nesqp)
407 {
408 struct nes_device *nesdev = nesvnic->nesdev;
409 struct pau_fpdu_info *fpdu_info;
410 struct nes_hw_cqp_wqe *cqp_wqe;
411 struct nes_cqp_request *cqp_request;
412 unsigned long flags;
413 u64 u64tmp;
414 u32 u32tmp;
415 int rc;
416
417 while (1) {
418 spin_lock_irqsave(&nesqp->pau_lock, flags);
419 rc = get_fpdu_info(nesdev, nesqp, &fpdu_info);
420 if (rc || (fpdu_info == NULL)) {
421 spin_unlock_irqrestore(&nesqp->pau_lock, flags);
422 return rc;
423 }
424
425 cqp_request = fpdu_info->cqp_request;
426 cqp_wqe = &cqp_request->cqp_wqe;
427 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
428 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_DL_OPCODE_IDX,
429 NES_CQP_DOWNLOAD_SEGMENT |
430 (((u32)nesvnic->logical_port) << NES_CQP_OP_LOGICAL_PORT_SHIFT));
431
432 u32tmp = fpdu_info->hdr_len << 16;
433 u32tmp |= fpdu_info->hdr_len + (u32)fpdu_info->data_len;
434 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_DL_LENGTH_0_TOTAL_IDX,
435 u32tmp);
436
437 u32tmp = (fpdu_info->frags[1].frag_len << 16) | fpdu_info->frags[0].frag_len;
438 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_LENGTH_2_1_IDX,
439 u32tmp);
440
441 u32tmp = (fpdu_info->frags[3].frag_len << 16) | fpdu_info->frags[2].frag_len;
442 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_LENGTH_4_3_IDX,
443 u32tmp);
444
445 u64tmp = (u64)fpdu_info->hdr_pbase;
446 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG0_LOW_IDX,
447 lower_32_bits(u64tmp));
448 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG0_HIGH_IDX,
449 upper_32_bits(u64tmp));
450
451 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG1_LOW_IDX,
452 lower_32_bits(fpdu_info->frags[0].physaddr));
453 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG1_HIGH_IDX,
454 upper_32_bits(fpdu_info->frags[0].physaddr));
455
456 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG2_LOW_IDX,
457 lower_32_bits(fpdu_info->frags[1].physaddr));
458 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG2_HIGH_IDX,
459 upper_32_bits(fpdu_info->frags[1].physaddr));
460
461 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG3_LOW_IDX,
462 lower_32_bits(fpdu_info->frags[2].physaddr));
463 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG3_HIGH_IDX,
464 upper_32_bits(fpdu_info->frags[2].physaddr));
465
466 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG4_LOW_IDX,
467 lower_32_bits(fpdu_info->frags[3].physaddr));
468 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_NIC_SQ_WQE_FRAG4_HIGH_IDX,
469 upper_32_bits(fpdu_info->frags[3].physaddr));
470
471 cqp_request->cqp_callback_pointer = fpdu_info;
472 cqp_request->callback = 1;
473 cqp_request->cqp_callback = nes_download_callback;
474
475 atomic_set(&cqp_request->refcount, 1);
476 nes_post_cqp_request(nesdev, cqp_request);
477 spin_unlock_irqrestore(&nesqp->pau_lock, flags);
478 }
479
480 return 0;
481 }
482
483 static void process_fpdus(struct nes_vnic *nesvnic, struct nes_qp *nesqp)
484 {
485 int again = 1;
486 unsigned long flags;
487
488 do {
489 /* Ignore rc - if it failed, tcp retries will cause it to try again */
490 forward_fpdus(nesvnic, nesqp);
491
492 spin_lock_irqsave(&nesqp->pau_lock, flags);
493 if (nesqp->pau_pending) {
494 nesqp->pau_pending = 0;
495 } else {
496 nesqp->pau_busy = 0;
497 again = 0;
498 }
499
500 spin_unlock_irqrestore(&nesqp->pau_lock, flags);
501 } while (again);
502 }
503
504 /**
505 * queue_fpdus - Handle fpdu's that hw passed up to sw
506 */
507 static void queue_fpdus(struct sk_buff *skb, struct nes_vnic *nesvnic, struct nes_qp *nesqp)
508 {
509 struct sk_buff *tmpskb;
510 struct nes_rskb_cb *cb;
511 struct iphdr *iph;
512 struct tcphdr *tcph;
513 unsigned char *tcph_end;
514 u32 rcv_nxt;
515 u32 rcv_wnd;
516 u32 seqnum;
517 u32 len;
518 bool process_it = false;
519 unsigned long flags;
520
521 /* Move data ptr to after tcp header */
522 iph = (struct iphdr *)skb->data;
523 tcph = (struct tcphdr *)(((char *)iph) + (4 * iph->ihl));
524 seqnum = be32_to_cpu(tcph->seq);
525 tcph_end = (((char *)tcph) + (4 * tcph->doff));
526
527 len = be16_to_cpu(iph->tot_len);
528 if (skb->len > len)
529 skb_trim(skb, len);
530 skb_pull(skb, tcph_end - skb->data);
531
532 /* Initialize tracking values */
533 cb = (struct nes_rskb_cb *)&skb->cb[0];
534 cb->seqnum = seqnum;
535
536 /* Make sure data is in the receive window */
537 rcv_nxt = nesqp->pau_rcv_nxt;
538 rcv_wnd = le32_to_cpu(nesqp->nesqp_context->rcv_wnd);
539 if (!between(seqnum, rcv_nxt, (rcv_nxt + rcv_wnd))) {
540 nes_mgt_free_skb(nesvnic->nesdev, skb, PCI_DMA_TODEVICE);
541 nes_rem_ref_cm_node(nesqp->cm_node);
542 return;
543 }
544
545 spin_lock_irqsave(&nesqp->pau_lock, flags);
546
547 if (nesqp->pau_busy)
548 nesqp->pau_pending = 1;
549 else
550 nesqp->pau_busy = 1;
551
552 /* Queue skb by sequence number */
553 if (skb_queue_len(&nesqp->pau_list) == 0) {
554 skb_queue_head(&nesqp->pau_list, skb);
555 } else {
556 skb_queue_walk(&nesqp->pau_list, tmpskb) {
557 cb = (struct nes_rskb_cb *)&tmpskb->cb[0];
558 if (before(seqnum, cb->seqnum))
559 break;
560 }
561 skb_insert(tmpskb, skb, &nesqp->pau_list);
562 }
563 if (nesqp->pau_state == PAU_READY)
564 process_it = true;
565 spin_unlock_irqrestore(&nesqp->pau_lock, flags);
566
567 if (process_it)
568 process_fpdus(nesvnic, nesqp);
569
570 return;
571 }
572
573 /**
574 * mgt_thread - Handle mgt skbs in a safe context
575 */
576 static int mgt_thread(void *context)
577 {
578 struct nes_vnic *nesvnic = context;
579 struct sk_buff *skb;
580 struct nes_rskb_cb *cb;
581
582 while (!kthread_should_stop()) {
583 wait_event_interruptible(nesvnic->mgt_wait_queue,
584 skb_queue_len(&nesvnic->mgt_skb_list) || kthread_should_stop());
585 while ((skb_queue_len(&nesvnic->mgt_skb_list)) && !kthread_should_stop()) {
586 skb = skb_dequeue(&nesvnic->mgt_skb_list);
587 cb = (struct nes_rskb_cb *)&skb->cb[0];
588 cb->data_start = skb->data - ETH_HLEN;
589 cb->busaddr = pci_map_single(nesvnic->nesdev->pcidev, cb->data_start,
590 nesvnic->max_frame_size, PCI_DMA_TODEVICE);
591 queue_fpdus(skb, nesvnic, cb->nesqp);
592 }
593 }
594
595 /* Closing down so delete any entries on the queue */
596 while (skb_queue_len(&nesvnic->mgt_skb_list)) {
597 skb = skb_dequeue(&nesvnic->mgt_skb_list);
598 cb = (struct nes_rskb_cb *)&skb->cb[0];
599 nes_rem_ref_cm_node(cb->nesqp->cm_node);
600 dev_kfree_skb_any(skb);
601 }
602 return 0;
603 }
604
605 /**
606 * nes_queue_skbs - Queue skb so it can be handled in a thread context
607 */
608 void nes_queue_mgt_skbs(struct sk_buff *skb, struct nes_vnic *nesvnic, struct nes_qp *nesqp)
609 {
610 struct nes_rskb_cb *cb;
611
612 cb = (struct nes_rskb_cb *)&skb->cb[0];
613 cb->nesqp = nesqp;
614 skb_queue_tail(&nesvnic->mgt_skb_list, skb);
615 wake_up_interruptible(&nesvnic->mgt_wait_queue);
616 }
617
618 void nes_destroy_pau_qp(struct nes_device *nesdev, struct nes_qp *nesqp)
619 {
620 struct sk_buff *skb;
621 unsigned long flags;
622 atomic_inc(&pau_qps_destroyed);
623
624 /* Free packets that have not yet been forwarded */
625 /* Lock is acquired by skb_dequeue when removing the skb */
626 spin_lock_irqsave(&nesqp->pau_lock, flags);
627 while (skb_queue_len(&nesqp->pau_list)) {
628 skb = skb_dequeue(&nesqp->pau_list);
629 nes_mgt_free_skb(nesdev, skb, PCI_DMA_TODEVICE);
630 nes_rem_ref_cm_node(nesqp->cm_node);
631 }
632 spin_unlock_irqrestore(&nesqp->pau_lock, flags);
633 }
634
635 static void nes_chg_qh_handler(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
636 {
637 struct pau_qh_chg *qh_chg = cqp_request->cqp_callback_pointer;
638 struct nes_cqp_request *new_request;
639 struct nes_hw_cqp_wqe *cqp_wqe;
640 struct nes_adapter *nesadapter;
641 struct nes_qp *nesqp;
642 struct nes_v4_quad nes_quad;
643 u32 crc_value;
644 u64 u64temp;
645
646 nesadapter = nesdev->nesadapter;
647 nesqp = qh_chg->nesqp;
648
649 /* Should we handle the bad completion */
650 if (cqp_request->major_code)
651 WARN(1, PFX "Invalid cqp_request major_code=0x%x\n",
652 cqp_request->major_code);
653
654 switch (nesqp->pau_state) {
655 case PAU_DEL_QH:
656 /* Old hash code deleted, now set the new one */
657 nesqp->pau_state = PAU_ADD_LB_QH;
658 new_request = nes_get_cqp_request(nesdev);
659 if (new_request == NULL) {
660 nes_debug(NES_DBG_PAU, "Failed to get a new_request.\n");
661 WARN_ON(1);
662 return;
663 }
664
665 memset(&nes_quad, 0, sizeof(nes_quad));
666 nes_quad.DstIpAdrIndex =
667 cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) << 24);
668 nes_quad.SrcIpadr = cpu_to_be32(0x7f000001);
669 nes_quad.TcpPorts[0] = swab16(nesqp->nesqp_context->tcpPorts[1]);
670 nes_quad.TcpPorts[1] = swab16(nesqp->nesqp_context->tcpPorts[0]);
671
672 /* Produce hash key */
673 crc_value = get_crc_value(&nes_quad);
674 nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
675 nes_debug(NES_DBG_PAU, "new HTE Index = 0x%08X, CRC = 0x%08X\n",
676 nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);
677
678 nesqp->hte_index &= nesadapter->hte_index_mask;
679 nesqp->nesqp_context->hte_index = cpu_to_le32(nesqp->hte_index);
680 nesqp->nesqp_context->ip0 = cpu_to_le32(0x7f000001);
681 nesqp->nesqp_context->rcv_nxt = cpu_to_le32(nesqp->pau_rcv_nxt);
682
683 cqp_wqe = &new_request->cqp_wqe;
684 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
685 set_wqe_32bit_value(cqp_wqe->wqe_words,
686 NES_CQP_WQE_OPCODE_IDX, NES_CQP_MANAGE_QUAD_HASH |
687 NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_CONTEXT_VALID | NES_CQP_QP_IWARP_STATE_RTS);
688 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
689 u64temp = (u64)nesqp->nesqp_context_pbase;
690 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
691
692 nes_debug(NES_DBG_PAU, "Waiting for CQP completion for adding the quad hash.\n");
693
694 new_request->cqp_callback_pointer = qh_chg;
695 new_request->callback = 1;
696 new_request->cqp_callback = nes_chg_qh_handler;
697 atomic_set(&new_request->refcount, 1);
698 nes_post_cqp_request(nesdev, new_request);
699 break;
700
701 case PAU_ADD_LB_QH:
702 /* Start processing the queued fpdu's */
703 nesqp->pau_state = PAU_READY;
704 process_fpdus(qh_chg->nesvnic, qh_chg->nesqp);
705 kfree(qh_chg);
706 break;
707 }
708 }
709
710 /**
711 * nes_change_quad_hash
712 */
713 static int nes_change_quad_hash(struct nes_device *nesdev,
714 struct nes_vnic *nesvnic, struct nes_qp *nesqp)
715 {
716 struct nes_cqp_request *cqp_request = NULL;
717 struct pau_qh_chg *qh_chg = NULL;
718 u64 u64temp;
719 struct nes_hw_cqp_wqe *cqp_wqe;
720 int ret = 0;
721
722 cqp_request = nes_get_cqp_request(nesdev);
723 if (cqp_request == NULL) {
724 nes_debug(NES_DBG_PAU, "Failed to get a cqp_request.\n");
725 ret = -ENOMEM;
726 goto chg_qh_err;
727 }
728
729 qh_chg = kmalloc(sizeof *qh_chg, GFP_ATOMIC);
730 if (!qh_chg) {
731 ret = -ENOMEM;
732 goto chg_qh_err;
733 }
734 qh_chg->nesdev = nesdev;
735 qh_chg->nesvnic = nesvnic;
736 qh_chg->nesqp = nesqp;
737 nesqp->pau_state = PAU_DEL_QH;
738
739 cqp_wqe = &cqp_request->cqp_wqe;
740 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
741 set_wqe_32bit_value(cqp_wqe->wqe_words,
742 NES_CQP_WQE_OPCODE_IDX, NES_CQP_MANAGE_QUAD_HASH | NES_CQP_QP_DEL_HTE |
743 NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_CONTEXT_VALID | NES_CQP_QP_IWARP_STATE_RTS);
744 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
745 u64temp = (u64)nesqp->nesqp_context_pbase;
746 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
747
748 nes_debug(NES_DBG_PAU, "Waiting for CQP completion for deleting the quad hash.\n");
749
750 cqp_request->cqp_callback_pointer = qh_chg;
751 cqp_request->callback = 1;
752 cqp_request->cqp_callback = nes_chg_qh_handler;
753 atomic_set(&cqp_request->refcount, 1);
754 nes_post_cqp_request(nesdev, cqp_request);
755
756 return ret;
757
758 chg_qh_err:
759 kfree(qh_chg);
760 if (cqp_request)
761 nes_put_cqp_request(nesdev, cqp_request);
762 return ret;
763 }
764
765 /**
766 * nes_mgt_ce_handler
767 * This management code deals with any packed and unaligned (pau) fpdu's
768 * that the hardware cannot handle.
769 */
770 static void nes_mgt_ce_handler(struct nes_device *nesdev, struct nes_hw_nic_cq *cq)
771 {
772 struct nes_vnic_mgt *mgtvnic = container_of(cq, struct nes_vnic_mgt, mgt_cq);
773 struct nes_adapter *nesadapter = nesdev->nesadapter;
774 u32 head;
775 u32 cq_size;
776 u32 cqe_count = 0;
777 u32 cqe_misc;
778 u32 qp_id = 0;
779 u32 skbs_needed;
780 unsigned long context;
781 struct nes_qp *nesqp;
782 struct sk_buff *rx_skb;
783 struct nes_rskb_cb *cb;
784
785 head = cq->cq_head;
786 cq_size = cq->cq_size;
787
788 while (1) {
789 cqe_misc = le32_to_cpu(cq->cq_vbase[head].cqe_words[NES_NIC_CQE_MISC_IDX]);
790 if (!(cqe_misc & NES_NIC_CQE_VALID))
791 break;
792
793 nesqp = NULL;
794 if (cqe_misc & NES_NIC_CQE_ACCQP_VALID) {
795 qp_id = le32_to_cpu(cq->cq_vbase[head].cqe_words[NES_NIC_CQE_ACCQP_ID_IDX]);
796 qp_id &= 0x001fffff;
797 if (qp_id < nesadapter->max_qp) {
798 context = (unsigned long)nesadapter->qp_table[qp_id - NES_FIRST_QPN];
799 nesqp = (struct nes_qp *)context;
800 }
801 }
802
803 if (nesqp) {
804 if (nesqp->pau_mode == false) {
805 nesqp->pau_mode = true; /* First time for this qp */
806 nesqp->pau_rcv_nxt = le32_to_cpu(
807 cq->cq_vbase[head].cqe_words[NES_NIC_CQE_HASH_RCVNXT]);
808 skb_queue_head_init(&nesqp->pau_list);
809 spin_lock_init(&nesqp->pau_lock);
810 atomic_inc(&pau_qps_created);
811 nes_change_quad_hash(nesdev, mgtvnic->nesvnic, nesqp);
812 }
813
814 rx_skb = mgtvnic->mgt.rx_skb[mgtvnic->mgt.rq_tail];
815 rx_skb->len = 0;
816 skb_put(rx_skb, cqe_misc & 0x0000ffff);
817 rx_skb->protocol = eth_type_trans(rx_skb, mgtvnic->nesvnic->netdev);
818 cb = (struct nes_rskb_cb *)&rx_skb->cb[0];
819 pci_unmap_single(nesdev->pcidev, cb->busaddr, cb->maplen, PCI_DMA_FROMDEVICE);
820 cb->busaddr = 0;
821 mgtvnic->mgt.rq_tail++;
822 mgtvnic->mgt.rq_tail &= mgtvnic->mgt.rq_size - 1;
823
824 nes_add_ref_cm_node(nesqp->cm_node);
825 nes_queue_mgt_skbs(rx_skb, mgtvnic->nesvnic, nesqp);
826 } else {
827 printk(KERN_ERR PFX "Invalid QP %d for packed/unaligned handling\n", qp_id);
828 }
829
830 cq->cq_vbase[head].cqe_words[NES_NIC_CQE_MISC_IDX] = 0;
831 cqe_count++;
832 if (++head >= cq_size)
833 head = 0;
834
835 if (cqe_count == 255) {
836 /* Replenish mgt CQ */
837 nes_write32(nesdev->regs + NES_CQE_ALLOC, cq->cq_number | (cqe_count << 16));
838 nesdev->currcq_count += cqe_count;
839 cqe_count = 0;
840 }
841
842 skbs_needed = atomic_inc_return(&mgtvnic->rx_skbs_needed);
843 if (skbs_needed > (mgtvnic->mgt.rq_size >> 1))
844 nes_replenish_mgt_rq(mgtvnic);
845 }
846
847 cq->cq_head = head;
848 nes_write32(nesdev->regs + NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
849 cq->cq_number | (cqe_count << 16));
850 nes_read32(nesdev->regs + NES_CQE_ALLOC);
851 nesdev->currcq_count += cqe_count;
852 }
853
854 /**
855 * nes_init_mgt_qp
856 */
857 int nes_init_mgt_qp(struct nes_device *nesdev, struct net_device *netdev, struct nes_vnic *nesvnic)
858 {
859 struct nes_vnic_mgt *mgtvnic;
860 u32 counter;
861 void *vmem;
862 dma_addr_t pmem;
863 struct nes_hw_cqp_wqe *cqp_wqe;
864 u32 cqp_head;
865 unsigned long flags;
866 struct nes_hw_nic_qp_context *mgt_context;
867 u64 u64temp;
868 struct nes_hw_nic_rq_wqe *mgt_rqe;
869 struct sk_buff *skb;
870 u32 wqe_count;
871 struct nes_rskb_cb *cb;
872 u32 mgt_mem_size;
873 void *mgt_vbase;
874 dma_addr_t mgt_pbase;
875 int i;
876 int ret;
877
878 /* Allocate space the all mgt QPs once */
879 mgtvnic = kcalloc(NES_MGT_QP_COUNT, sizeof(struct nes_vnic_mgt),
880 GFP_KERNEL);
881 if (!mgtvnic)
882 return -ENOMEM;
883
884 /* Allocate fragment, RQ, and CQ; Reuse CEQ based on the PCI function */
885 /* We are not sending from this NIC so sq is not allocated */
886 mgt_mem_size = 256 +
887 (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe)) +
888 (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_cqe)) +
889 sizeof(struct nes_hw_nic_qp_context);
890 mgt_mem_size = (mgt_mem_size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
891 mgt_vbase = pci_alloc_consistent(nesdev->pcidev, NES_MGT_QP_COUNT * mgt_mem_size, &mgt_pbase);
892 if (!mgt_vbase) {
893 kfree(mgtvnic);
894 nes_debug(NES_DBG_INIT, "Unable to allocate memory for mgt host descriptor rings\n");
895 return -ENOMEM;
896 }
897
898 nesvnic->mgt_mem_size = NES_MGT_QP_COUNT * mgt_mem_size;
899 nesvnic->mgt_vbase = mgt_vbase;
900 nesvnic->mgt_pbase = mgt_pbase;
901
902 skb_queue_head_init(&nesvnic->mgt_skb_list);
903 init_waitqueue_head(&nesvnic->mgt_wait_queue);
904 nesvnic->mgt_thread = kthread_run(mgt_thread, nesvnic, "nes_mgt_thread");
905
906 for (i = 0; i < NES_MGT_QP_COUNT; i++) {
907 mgtvnic->nesvnic = nesvnic;
908 mgtvnic->mgt.qp_id = nesdev->mac_index + NES_MGT_QP_OFFSET + i;
909 memset(mgt_vbase, 0, mgt_mem_size);
910 nes_debug(NES_DBG_INIT, "Allocated mgt QP structures at %p (phys = %016lX), size = %u.\n",
911 mgt_vbase, (unsigned long)mgt_pbase, mgt_mem_size);
912
913 vmem = (void *)(((unsigned long)mgt_vbase + (256 - 1)) &
914 ~(unsigned long)(256 - 1));
915 pmem = (dma_addr_t)(((unsigned long long)mgt_pbase + (256 - 1)) &
916 ~(unsigned long long)(256 - 1));
917
918 spin_lock_init(&mgtvnic->mgt.rq_lock);
919
920 /* setup the RQ */
921 mgtvnic->mgt.rq_vbase = vmem;
922 mgtvnic->mgt.rq_pbase = pmem;
923 mgtvnic->mgt.rq_head = 0;
924 mgtvnic->mgt.rq_tail = 0;
925 mgtvnic->mgt.rq_size = NES_MGT_WQ_COUNT;
926
927 /* setup the CQ */
928 vmem += (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe));
929 pmem += (NES_MGT_WQ_COUNT * sizeof(struct nes_hw_nic_rq_wqe));
930
931 mgtvnic->mgt_cq.cq_number = mgtvnic->mgt.qp_id;
932 mgtvnic->mgt_cq.cq_vbase = vmem;
933 mgtvnic->mgt_cq.cq_pbase = pmem;
934 mgtvnic->mgt_cq.cq_head = 0;
935 mgtvnic->mgt_cq.cq_size = NES_MGT_WQ_COUNT;
936
937 mgtvnic->mgt_cq.ce_handler = nes_mgt_ce_handler;
938
939 /* Send CreateCQ request to CQP */
940 spin_lock_irqsave(&nesdev->cqp.lock, flags);
941 cqp_head = nesdev->cqp.sq_head;
942
943 cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head];
944 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
945
946 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] = cpu_to_le32(
947 NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
948 ((u32)mgtvnic->mgt_cq.cq_size << 16));
949 cqp_wqe->wqe_words[NES_CQP_WQE_ID_IDX] = cpu_to_le32(
950 mgtvnic->mgt_cq.cq_number | ((u32)nesdev->ceq_index << 16));
951 u64temp = (u64)mgtvnic->mgt_cq.cq_pbase;
952 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
953 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
954 u64temp = (unsigned long)&mgtvnic->mgt_cq;
955 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] = cpu_to_le32((u32)(u64temp >> 1));
956 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
957 cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
958 cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
959
960 if (++cqp_head >= nesdev->cqp.sq_size)
961 cqp_head = 0;
962 cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head];
963 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
964
965 /* Send CreateQP request to CQP */
966 mgt_context = (void *)(&mgtvnic->mgt_cq.cq_vbase[mgtvnic->mgt_cq.cq_size]);
967 mgt_context->context_words[NES_NIC_CTX_MISC_IDX] =
968 cpu_to_le32((u32)NES_MGT_CTX_SIZE |
969 ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 12));
970 nes_debug(NES_DBG_INIT, "RX_WINDOW_BUFFER_PAGE_TABLE_SIZE = 0x%08X, RX_WINDOW_BUFFER_SIZE = 0x%08X\n",
971 nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_PAGE_TABLE_SIZE),
972 nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_SIZE));
973 if (nes_read_indexed(nesdev, NES_IDX_RX_WINDOW_BUFFER_SIZE) != 0)
974 mgt_context->context_words[NES_NIC_CTX_MISC_IDX] |= cpu_to_le32(NES_NIC_BACK_STORE);
975
976 u64temp = (u64)mgtvnic->mgt.rq_pbase;
977 mgt_context->context_words[NES_NIC_CTX_SQ_LOW_IDX] = cpu_to_le32((u32)u64temp);
978 mgt_context->context_words[NES_NIC_CTX_SQ_HIGH_IDX] = cpu_to_le32((u32)(u64temp >> 32));
979 u64temp = (u64)mgtvnic->mgt.rq_pbase;
980 mgt_context->context_words[NES_NIC_CTX_RQ_LOW_IDX] = cpu_to_le32((u32)u64temp);
981 mgt_context->context_words[NES_NIC_CTX_RQ_HIGH_IDX] = cpu_to_le32((u32)(u64temp >> 32));
982
983 cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] = cpu_to_le32(NES_CQP_CREATE_QP |
984 NES_CQP_QP_TYPE_NIC);
985 cqp_wqe->wqe_words[NES_CQP_WQE_ID_IDX] = cpu_to_le32(mgtvnic->mgt.qp_id);
986 u64temp = (u64)mgtvnic->mgt_cq.cq_pbase +
987 (mgtvnic->mgt_cq.cq_size * sizeof(struct nes_hw_nic_cqe));
988 set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
989
990 if (++cqp_head >= nesdev->cqp.sq_size)
991 cqp_head = 0;
992 nesdev->cqp.sq_head = cqp_head;
993
994 barrier();
995
996 /* Ring doorbell (2 WQEs) */
997 nes_write32(nesdev->regs + NES_WQE_ALLOC, 0x02800000 | nesdev->cqp.qp_id);
998
999 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1000 nes_debug(NES_DBG_INIT, "Waiting for create MGT QP%u to complete.\n",
1001 mgtvnic->mgt.qp_id);
1002
1003 ret = wait_event_timeout(nesdev->cqp.waitq, (nesdev->cqp.sq_tail == cqp_head),
1004 NES_EVENT_TIMEOUT);
1005 nes_debug(NES_DBG_INIT, "Create MGT QP%u completed, wait_event_timeout ret = %u.\n",
1006 mgtvnic->mgt.qp_id, ret);
1007 if (!ret) {
1008 nes_debug(NES_DBG_INIT, "MGT QP%u create timeout expired\n", mgtvnic->mgt.qp_id);
1009 if (i == 0) {
1010 pci_free_consistent(nesdev->pcidev, nesvnic->mgt_mem_size, nesvnic->mgt_vbase,
1011 nesvnic->mgt_pbase);
1012 kfree(mgtvnic);
1013 } else {
1014 nes_destroy_mgt(nesvnic);
1015 }
1016 return -EIO;
1017 }
1018
1019 /* Populate the RQ */
1020 for (counter = 0; counter < (NES_MGT_WQ_COUNT - 1); counter++) {
1021 skb = dev_alloc_skb(nesvnic->max_frame_size);
1022 if (!skb) {
1023 nes_debug(NES_DBG_INIT, "%s: out of memory for receive skb\n", netdev->name);
1024 return -ENOMEM;
1025 }
1026
1027 skb->dev = netdev;
1028
1029 pmem = pci_map_single(nesdev->pcidev, skb->data,
1030 nesvnic->max_frame_size, PCI_DMA_FROMDEVICE);
1031 cb = (struct nes_rskb_cb *)&skb->cb[0];
1032 cb->busaddr = pmem;
1033 cb->maplen = nesvnic->max_frame_size;
1034
1035 mgt_rqe = &mgtvnic->mgt.rq_vbase[counter];
1036 mgt_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_1_0_IDX] = cpu_to_le32((u32)nesvnic->max_frame_size);
1037 mgt_rqe->wqe_words[NES_NIC_RQ_WQE_LENGTH_3_2_IDX] = 0;
1038 mgt_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_LOW_IDX] = cpu_to_le32((u32)pmem);
1039 mgt_rqe->wqe_words[NES_NIC_RQ_WQE_FRAG0_HIGH_IDX] = cpu_to_le32((u32)((u64)pmem >> 32));
1040 mgtvnic->mgt.rx_skb[counter] = skb;
1041 }
1042
1043 timer_setup(&mgtvnic->rq_wqes_timer, nes_mgt_rq_wqes_timeout,
1044 0);
1045
1046 wqe_count = NES_MGT_WQ_COUNT - 1;
1047 mgtvnic->mgt.rq_head = wqe_count;
1048 barrier();
1049 do {
1050 counter = min(wqe_count, ((u32)255));
1051 wqe_count -= counter;
1052 nes_write32(nesdev->regs + NES_WQE_ALLOC, (counter << 24) | mgtvnic->mgt.qp_id);
1053 } while (wqe_count);
1054
1055 nes_write32(nesdev->regs + NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
1056 mgtvnic->mgt_cq.cq_number);
1057 nes_read32(nesdev->regs + NES_CQE_ALLOC);
1058
1059 mgt_vbase += mgt_mem_size;
1060 mgt_pbase += mgt_mem_size;
1061 nesvnic->mgtvnic[i] = mgtvnic++;
1062 }
1063 return 0;
1064 }
1065
1066
1067 void nes_destroy_mgt(struct nes_vnic *nesvnic)
1068 {
1069 struct nes_device *nesdev = nesvnic->nesdev;
1070 struct nes_vnic_mgt *mgtvnic;
1071 struct nes_vnic_mgt *first_mgtvnic;
1072 unsigned long flags;
1073 struct nes_hw_cqp_wqe *cqp_wqe;
1074 u32 cqp_head;
1075 struct sk_buff *rx_skb;
1076 int i;
1077 int ret;
1078
1079 kthread_stop(nesvnic->mgt_thread);
1080
1081 /* Free remaining NIC receive buffers */
1082 first_mgtvnic = nesvnic->mgtvnic[0];
1083 for (i = 0; i < NES_MGT_QP_COUNT; i++) {
1084 mgtvnic = nesvnic->mgtvnic[i];
1085 if (mgtvnic == NULL)
1086 continue;
1087
1088 while (mgtvnic->mgt.rq_head != mgtvnic->mgt.rq_tail) {
1089 rx_skb = mgtvnic->mgt.rx_skb[mgtvnic->mgt.rq_tail];
1090 nes_mgt_free_skb(nesdev, rx_skb, PCI_DMA_FROMDEVICE);
1091 mgtvnic->mgt.rq_tail++;
1092 mgtvnic->mgt.rq_tail &= (mgtvnic->mgt.rq_size - 1);
1093 }
1094
1095 spin_lock_irqsave(&nesdev->cqp.lock, flags);
1096
1097 /* Destroy NIC QP */
1098 cqp_head = nesdev->cqp.sq_head;
1099 cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head];
1100 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1101
1102 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
1103 (NES_CQP_DESTROY_QP | NES_CQP_QP_TYPE_NIC));
1104 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1105 mgtvnic->mgt.qp_id);
1106
1107 if (++cqp_head >= nesdev->cqp.sq_size)
1108 cqp_head = 0;
1109
1110 cqp_wqe = &nesdev->cqp.sq_vbase[cqp_head];
1111
1112 /* Destroy NIC CQ */
1113 nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
1114 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
1115 (NES_CQP_DESTROY_CQ | ((u32)mgtvnic->mgt_cq.cq_size << 16)));
1116 set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
1117 (mgtvnic->mgt_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
1118
1119 if (++cqp_head >= nesdev->cqp.sq_size)
1120 cqp_head = 0;
1121
1122 nesdev->cqp.sq_head = cqp_head;
1123 barrier();
1124
1125 /* Ring doorbell (2 WQEs) */
1126 nes_write32(nesdev->regs + NES_WQE_ALLOC, 0x02800000 | nesdev->cqp.qp_id);
1127
1128 spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
1129 nes_debug(NES_DBG_SHUTDOWN, "Waiting for CQP, cqp_head=%u, cqp.sq_head=%u,"
1130 " cqp.sq_tail=%u, cqp.sq_size=%u\n",
1131 cqp_head, nesdev->cqp.sq_head,
1132 nesdev->cqp.sq_tail, nesdev->cqp.sq_size);
1133
1134 ret = wait_event_timeout(nesdev->cqp.waitq, (nesdev->cqp.sq_tail == cqp_head),
1135 NES_EVENT_TIMEOUT);
1136
1137 nes_debug(NES_DBG_SHUTDOWN, "Destroy MGT QP returned, wait_event_timeout ret = %u, cqp_head=%u,"
1138 " cqp.sq_head=%u, cqp.sq_tail=%u\n",
1139 ret, cqp_head, nesdev->cqp.sq_head, nesdev->cqp.sq_tail);
1140 if (!ret)
1141 nes_debug(NES_DBG_SHUTDOWN, "MGT QP%u destroy timeout expired\n",
1142 mgtvnic->mgt.qp_id);
1143
1144 nesvnic->mgtvnic[i] = NULL;
1145 }
1146
1147 if (nesvnic->mgt_vbase) {
1148 pci_free_consistent(nesdev->pcidev, nesvnic->mgt_mem_size, nesvnic->mgt_vbase,
1149 nesvnic->mgt_pbase);
1150 nesvnic->mgt_vbase = NULL;
1151 nesvnic->mgt_pbase = 0;
1152 }
1153
1154 kfree(first_mgtvnic);
1155 }
Linux with added FPC-III support