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spi-topcliff-pch: add recovery processing in case wait-event timeout
[zen-stable.git] / drivers / infiniband / hw / cxgb3 / cxio_hal.c
blobc3f5aca4ef00672f8522548afa89d60d85534d71
1 /*
2 * Copyright (c) 2006 Chelsio, 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 #include <asm/delay.h>
33
34 #include <linux/mutex.h>
35 #include <linux/netdevice.h>
36 #include <linux/sched.h>
37 #include <linux/spinlock.h>
38 #include <linux/pci.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/slab.h>
41 #include <net/net_namespace.h>
42
43 #include "cxio_resource.h"
44 #include "cxio_hal.h"
45 #include "cxgb3_offload.h"
46 #include "sge_defs.h"
47
48 static LIST_HEAD(rdev_list);
49 static cxio_hal_ev_callback_func_t cxio_ev_cb = NULL;
50
51 static struct cxio_rdev *cxio_hal_find_rdev_by_name(char *dev_name)
52 {
53 struct cxio_rdev *rdev;
54
55 list_for_each_entry(rdev, &rdev_list, entry)
56 if (!strcmp(rdev->dev_name, dev_name))
57 return rdev;
58 return NULL;
59 }
60
61 static struct cxio_rdev *cxio_hal_find_rdev_by_t3cdev(struct t3cdev *tdev)
62 {
63 struct cxio_rdev *rdev;
64
65 list_for_each_entry(rdev, &rdev_list, entry)
66 if (rdev->t3cdev_p == tdev)
67 return rdev;
68 return NULL;
69 }
70
71 int cxio_hal_cq_op(struct cxio_rdev *rdev_p, struct t3_cq *cq,
72 enum t3_cq_opcode op, u32 credit)
73 {
74 int ret;
75 struct t3_cqe *cqe;
76 u32 rptr;
77
78 struct rdma_cq_op setup;
79 setup.id = cq->cqid;
80 setup.credits = (op == CQ_CREDIT_UPDATE) ? credit : 0;
81 setup.op = op;
82 ret = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_OP, &setup);
83
84 if ((ret < 0) || (op == CQ_CREDIT_UPDATE))
85 return ret;
86
87 /*
88 * If the rearm returned an index other than our current index,
89 * then there might be CQE's in flight (being DMA'd). We must wait
90 * here for them to complete or the consumer can miss a notification.
91 */
92 if (Q_PTR2IDX((cq->rptr), cq->size_log2) != ret) {
93 int i=0;
94
95 rptr = cq->rptr;
96
97 /*
98 * Keep the generation correct by bumping rptr until it
99 * matches the index returned by the rearm - 1.
100 */
101 while (Q_PTR2IDX((rptr+1), cq->size_log2) != ret)
102 rptr++;
103
104 /*
105 * Now rptr is the index for the (last) cqe that was
106 * in-flight at the time the HW rearmed the CQ. We
107 * spin until that CQE is valid.
108 */
109 cqe = cq->queue + Q_PTR2IDX(rptr, cq->size_log2);
110 while (!CQ_VLD_ENTRY(rptr, cq->size_log2, cqe)) {
111 udelay(1);
112 if (i++ > 1000000) {
113 printk(KERN_ERR "%s: stalled rnic\n",
114 rdev_p->dev_name);
115 return -EIO;
116 }
117 }
118
119 return 1;
120 }
121
122 return 0;
123 }
124
125 static int cxio_hal_clear_cq_ctx(struct cxio_rdev *rdev_p, u32 cqid)
126 {
127 struct rdma_cq_setup setup;
128 setup.id = cqid;
129 setup.base_addr = 0; /* NULL address */
130 setup.size = 0; /* disaable the CQ */
131 setup.credits = 0;
132 setup.credit_thres = 0;
133 setup.ovfl_mode = 0;
134 return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
135 }
136
137 static int cxio_hal_clear_qp_ctx(struct cxio_rdev *rdev_p, u32 qpid)
138 {
139 u64 sge_cmd;
140 struct t3_modify_qp_wr *wqe;
141 struct sk_buff *skb = alloc_skb(sizeof(*wqe), GFP_KERNEL);
142 if (!skb) {
143 PDBG("%s alloc_skb failed\n", __func__);
144 return -ENOMEM;
145 }
146 wqe = (struct t3_modify_qp_wr *) skb_put(skb, sizeof(*wqe));
147 memset(wqe, 0, sizeof(*wqe));
148 build_fw_riwrh((struct fw_riwrh *) wqe, T3_WR_QP_MOD,
149 T3_COMPLETION_FLAG | T3_NOTIFY_FLAG, 0, qpid, 7,
150 T3_SOPEOP);
151 wqe->flags = cpu_to_be32(MODQP_WRITE_EC);
152 sge_cmd = qpid << 8 | 3;
153 wqe->sge_cmd = cpu_to_be64(sge_cmd);
154 skb->priority = CPL_PRIORITY_CONTROL;
155 return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);
156 }
157
158 int cxio_create_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq, int kernel)
159 {
160 struct rdma_cq_setup setup;
161 int size = (1UL << (cq->size_log2)) * sizeof(struct t3_cqe);
162
163 size += 1; /* one extra page for storing cq-in-err state */
164 cq->cqid = cxio_hal_get_cqid(rdev_p->rscp);
165 if (!cq->cqid)
166 return -ENOMEM;
167 if (kernel) {
168 cq->sw_queue = kzalloc(size, GFP_KERNEL);
169 if (!cq->sw_queue)
170 return -ENOMEM;
171 }
172 cq->queue = dma_alloc_coherent(&(rdev_p->rnic_info.pdev->dev), size,
173 &(cq->dma_addr), GFP_KERNEL);
174 if (!cq->queue) {
175 kfree(cq->sw_queue);
176 return -ENOMEM;
177 }
178 dma_unmap_addr_set(cq, mapping, cq->dma_addr);
179 memset(cq->queue, 0, size);
180 setup.id = cq->cqid;
181 setup.base_addr = (u64) (cq->dma_addr);
182 setup.size = 1UL << cq->size_log2;
183 setup.credits = 65535;
184 setup.credit_thres = 1;
185 if (rdev_p->t3cdev_p->type != T3A)
186 setup.ovfl_mode = 0;
187 else
188 setup.ovfl_mode = 1;
189 return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
190 }
191
192 #ifdef notyet
193 int cxio_resize_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq)
194 {
195 struct rdma_cq_setup setup;
196 setup.id = cq->cqid;
197 setup.base_addr = (u64) (cq->dma_addr);
198 setup.size = 1UL << cq->size_log2;
199 setup.credits = setup.size;
200 setup.credit_thres = setup.size; /* TBD: overflow recovery */
201 setup.ovfl_mode = 1;
202 return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
203 }
204 #endif
205
206 static u32 get_qpid(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
207 {
208 struct cxio_qpid_list *entry;
209 u32 qpid;
210 int i;
211
212 mutex_lock(&uctx->lock);
213 if (!list_empty(&uctx->qpids)) {
214 entry = list_entry(uctx->qpids.next, struct cxio_qpid_list,
215 entry);
216 list_del(&entry->entry);
217 qpid = entry->qpid;
218 kfree(entry);
219 } else {
220 qpid = cxio_hal_get_qpid(rdev_p->rscp);
221 if (!qpid)
222 goto out;
223 for (i = qpid+1; i & rdev_p->qpmask; i++) {
224 entry = kmalloc(sizeof *entry, GFP_KERNEL);
225 if (!entry)
226 break;
227 entry->qpid = i;
228 list_add_tail(&entry->entry, &uctx->qpids);
229 }
230 }
231 out:
232 mutex_unlock(&uctx->lock);
233 PDBG("%s qpid 0x%x\n", __func__, qpid);
234 return qpid;
235 }
236
237 static void put_qpid(struct cxio_rdev *rdev_p, u32 qpid,
238 struct cxio_ucontext *uctx)
239 {
240 struct cxio_qpid_list *entry;
241
242 entry = kmalloc(sizeof *entry, GFP_KERNEL);
243 if (!entry)
244 return;
245 PDBG("%s qpid 0x%x\n", __func__, qpid);
246 entry->qpid = qpid;
247 mutex_lock(&uctx->lock);
248 list_add_tail(&entry->entry, &uctx->qpids);
249 mutex_unlock(&uctx->lock);
250 }
251
252 void cxio_release_ucontext(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
253 {
254 struct list_head *pos, *nxt;
255 struct cxio_qpid_list *entry;
256
257 mutex_lock(&uctx->lock);
258 list_for_each_safe(pos, nxt, &uctx->qpids) {
259 entry = list_entry(pos, struct cxio_qpid_list, entry);
260 list_del_init(&entry->entry);
261 if (!(entry->qpid & rdev_p->qpmask))
262 cxio_hal_put_qpid(rdev_p->rscp, entry->qpid);
263 kfree(entry);
264 }
265 mutex_unlock(&uctx->lock);
266 }
267
268 void cxio_init_ucontext(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
269 {
270 INIT_LIST_HEAD(&uctx->qpids);
271 mutex_init(&uctx->lock);
272 }
273
274 int cxio_create_qp(struct cxio_rdev *rdev_p, u32 kernel_domain,
275 struct t3_wq *wq, struct cxio_ucontext *uctx)
276 {
277 int depth = 1UL << wq->size_log2;
278 int rqsize = 1UL << wq->rq_size_log2;
279
280 wq->qpid = get_qpid(rdev_p, uctx);
281 if (!wq->qpid)
282 return -ENOMEM;
283
284 wq->rq = kzalloc(depth * sizeof(struct t3_swrq), GFP_KERNEL);
285 if (!wq->rq)
286 goto err1;
287
288 wq->rq_addr = cxio_hal_rqtpool_alloc(rdev_p, rqsize);
289 if (!wq->rq_addr)
290 goto err2;
291
292 wq->sq = kzalloc(depth * sizeof(struct t3_swsq), GFP_KERNEL);
293 if (!wq->sq)
294 goto err3;
295
296 wq->queue = dma_alloc_coherent(&(rdev_p->rnic_info.pdev->dev),
297 depth * sizeof(union t3_wr),
298 &(wq->dma_addr), GFP_KERNEL);
299 if (!wq->queue)
300 goto err4;
301
302 memset(wq->queue, 0, depth * sizeof(union t3_wr));
303 dma_unmap_addr_set(wq, mapping, wq->dma_addr);
304 wq->doorbell = (void __iomem *)rdev_p->rnic_info.kdb_addr;
305 if (!kernel_domain)
306 wq->udb = (u64)rdev_p->rnic_info.udbell_physbase +
307 (wq->qpid << rdev_p->qpshift);
308 wq->rdev = rdev_p;
309 PDBG("%s qpid 0x%x doorbell 0x%p udb 0x%llx\n", __func__,
310 wq->qpid, wq->doorbell, (unsigned long long) wq->udb);
311 return 0;
312 err4:
313 kfree(wq->sq);
314 err3:
315 cxio_hal_rqtpool_free(rdev_p, wq->rq_addr, rqsize);
316 err2:
317 kfree(wq->rq);
318 err1:
319 put_qpid(rdev_p, wq->qpid, uctx);
320 return -ENOMEM;
321 }
322
323 int cxio_destroy_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq)
324 {
325 int err;
326 err = cxio_hal_clear_cq_ctx(rdev_p, cq->cqid);
327 kfree(cq->sw_queue);
328 dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
329 (1UL << (cq->size_log2))
330 * sizeof(struct t3_cqe), cq->queue,
331 dma_unmap_addr(cq, mapping));
332 cxio_hal_put_cqid(rdev_p->rscp, cq->cqid);
333 return err;
334 }
335
336 int cxio_destroy_qp(struct cxio_rdev *rdev_p, struct t3_wq *wq,
337 struct cxio_ucontext *uctx)
338 {
339 dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
340 (1UL << (wq->size_log2))
341 * sizeof(union t3_wr), wq->queue,
342 dma_unmap_addr(wq, mapping));
343 kfree(wq->sq);
344 cxio_hal_rqtpool_free(rdev_p, wq->rq_addr, (1UL << wq->rq_size_log2));
345 kfree(wq->rq);
346 put_qpid(rdev_p, wq->qpid, uctx);
347 return 0;
348 }
349
350 static void insert_recv_cqe(struct t3_wq *wq, struct t3_cq *cq)
351 {
352 struct t3_cqe cqe;
353
354 PDBG("%s wq %p cq %p sw_rptr 0x%x sw_wptr 0x%x\n", __func__,
355 wq, cq, cq->sw_rptr, cq->sw_wptr);
356 memset(&cqe, 0, sizeof(cqe));
357 cqe.header = cpu_to_be32(V_CQE_STATUS(TPT_ERR_SWFLUSH) |
358 V_CQE_OPCODE(T3_SEND) |
359 V_CQE_TYPE(0) |
360 V_CQE_SWCQE(1) |
361 V_CQE_QPID(wq->qpid) |
362 V_CQE_GENBIT(Q_GENBIT(cq->sw_wptr,
363 cq->size_log2)));
364 *(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2)) = cqe;
365 cq->sw_wptr++;
366 }
367
368 int cxio_flush_rq(struct t3_wq *wq, struct t3_cq *cq, int count)
369 {
370 u32 ptr;
371 int flushed = 0;
372
373 PDBG("%s wq %p cq %p\n", __func__, wq, cq);
374
375 /* flush RQ */
376 PDBG("%s rq_rptr %u rq_wptr %u skip count %u\n", __func__,
377 wq->rq_rptr, wq->rq_wptr, count);
378 ptr = wq->rq_rptr + count;
379 while (ptr++ != wq->rq_wptr) {
380 insert_recv_cqe(wq, cq);
381 flushed++;
382 }
383 return flushed;
384 }
385
386 static void insert_sq_cqe(struct t3_wq *wq, struct t3_cq *cq,
387 struct t3_swsq *sqp)
388 {
389 struct t3_cqe cqe;
390
391 PDBG("%s wq %p cq %p sw_rptr 0x%x sw_wptr 0x%x\n", __func__,
392 wq, cq, cq->sw_rptr, cq->sw_wptr);
393 memset(&cqe, 0, sizeof(cqe));
394 cqe.header = cpu_to_be32(V_CQE_STATUS(TPT_ERR_SWFLUSH) |
395 V_CQE_OPCODE(sqp->opcode) |
396 V_CQE_TYPE(1) |
397 V_CQE_SWCQE(1) |
398 V_CQE_QPID(wq->qpid) |
399 V_CQE_GENBIT(Q_GENBIT(cq->sw_wptr,
400 cq->size_log2)));
401 cqe.u.scqe.wrid_hi = sqp->sq_wptr;
402
403 *(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2)) = cqe;
404 cq->sw_wptr++;
405 }
406
407 int cxio_flush_sq(struct t3_wq *wq, struct t3_cq *cq, int count)
408 {
409 __u32 ptr;
410 int flushed = 0;
411 struct t3_swsq *sqp = wq->sq + Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2);
412
413 ptr = wq->sq_rptr + count;
414 sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
415 while (ptr != wq->sq_wptr) {
416 sqp->signaled = 0;
417 insert_sq_cqe(wq, cq, sqp);
418 ptr++;
419 sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
420 flushed++;
421 }
422 return flushed;
423 }
424
425 /*
426 * Move all CQEs from the HWCQ into the SWCQ.
427 */
428 void cxio_flush_hw_cq(struct t3_cq *cq)
429 {
430 struct t3_cqe *cqe, *swcqe;
431
432 PDBG("%s cq %p cqid 0x%x\n", __func__, cq, cq->cqid);
433 cqe = cxio_next_hw_cqe(cq);
434 while (cqe) {
435 PDBG("%s flushing hwcq rptr 0x%x to swcq wptr 0x%x\n",
436 __func__, cq->rptr, cq->sw_wptr);
437 swcqe = cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2);
438 *swcqe = *cqe;
439 swcqe->header |= cpu_to_be32(V_CQE_SWCQE(1));
440 cq->sw_wptr++;
441 cq->rptr++;
442 cqe = cxio_next_hw_cqe(cq);
443 }
444 }
445
446 static int cqe_completes_wr(struct t3_cqe *cqe, struct t3_wq *wq)
447 {
448 if (CQE_OPCODE(*cqe) == T3_TERMINATE)
449 return 0;
450
451 if ((CQE_OPCODE(*cqe) == T3_RDMA_WRITE) && RQ_TYPE(*cqe))
452 return 0;
453
454 if ((CQE_OPCODE(*cqe) == T3_READ_RESP) && SQ_TYPE(*cqe))
455 return 0;
456
457 if (CQE_SEND_OPCODE(*cqe) && RQ_TYPE(*cqe) &&
458 Q_EMPTY(wq->rq_rptr, wq->rq_wptr))
459 return 0;
460
461 return 1;
462 }
463
464 void cxio_count_scqes(struct t3_cq *cq, struct t3_wq *wq, int *count)
465 {
466 struct t3_cqe *cqe;
467 u32 ptr;
468
469 *count = 0;
470 ptr = cq->sw_rptr;
471 while (!Q_EMPTY(ptr, cq->sw_wptr)) {
472 cqe = cq->sw_queue + (Q_PTR2IDX(ptr, cq->size_log2));
473 if ((SQ_TYPE(*cqe) ||
474 ((CQE_OPCODE(*cqe) == T3_READ_RESP) && wq->oldest_read)) &&
475 (CQE_QPID(*cqe) == wq->qpid))
476 (*count)++;
477 ptr++;
478 }
479 PDBG("%s cq %p count %d\n", __func__, cq, *count);
480 }
481
482 void cxio_count_rcqes(struct t3_cq *cq, struct t3_wq *wq, int *count)
483 {
484 struct t3_cqe *cqe;
485 u32 ptr;
486
487 *count = 0;
488 PDBG("%s count zero %d\n", __func__, *count);
489 ptr = cq->sw_rptr;
490 while (!Q_EMPTY(ptr, cq->sw_wptr)) {
491 cqe = cq->sw_queue + (Q_PTR2IDX(ptr, cq->size_log2));
492 if (RQ_TYPE(*cqe) && (CQE_OPCODE(*cqe) != T3_READ_RESP) &&
493 (CQE_QPID(*cqe) == wq->qpid) && cqe_completes_wr(cqe, wq))
494 (*count)++;
495 ptr++;
496 }
497 PDBG("%s cq %p count %d\n", __func__, cq, *count);
498 }
499
500 static int cxio_hal_init_ctrl_cq(struct cxio_rdev *rdev_p)
501 {
502 struct rdma_cq_setup setup;
503 setup.id = 0;
504 setup.base_addr = 0; /* NULL address */
505 setup.size = 1; /* enable the CQ */
506 setup.credits = 0;
507
508 /* force SGE to redirect to RspQ and interrupt */
509 setup.credit_thres = 0;
510 setup.ovfl_mode = 1;
511 return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
512 }
513
514 static int cxio_hal_init_ctrl_qp(struct cxio_rdev *rdev_p)
515 {
516 int err;
517 u64 sge_cmd, ctx0, ctx1;
518 u64 base_addr;
519 struct t3_modify_qp_wr *wqe;
520 struct sk_buff *skb;
521
522 skb = alloc_skb(sizeof(*wqe), GFP_KERNEL);
523 if (!skb) {
524 PDBG("%s alloc_skb failed\n", __func__);
525 return -ENOMEM;
526 }
527 err = cxio_hal_init_ctrl_cq(rdev_p);
528 if (err) {
529 PDBG("%s err %d initializing ctrl_cq\n", __func__, err);
530 goto err;
531 }
532 rdev_p->ctrl_qp.workq = dma_alloc_coherent(
533 &(rdev_p->rnic_info.pdev->dev),
534 (1 << T3_CTRL_QP_SIZE_LOG2) *
535 sizeof(union t3_wr),
536 &(rdev_p->ctrl_qp.dma_addr),
537 GFP_KERNEL);
538 if (!rdev_p->ctrl_qp.workq) {
539 PDBG("%s dma_alloc_coherent failed\n", __func__);
540 err = -ENOMEM;
541 goto err;
542 }
543 dma_unmap_addr_set(&rdev_p->ctrl_qp, mapping,
544 rdev_p->ctrl_qp.dma_addr);
545 rdev_p->ctrl_qp.doorbell = (void __iomem *)rdev_p->rnic_info.kdb_addr;
546 memset(rdev_p->ctrl_qp.workq, 0,
547 (1 << T3_CTRL_QP_SIZE_LOG2) * sizeof(union t3_wr));
548
549 mutex_init(&rdev_p->ctrl_qp.lock);
550 init_waitqueue_head(&rdev_p->ctrl_qp.waitq);
551
552 /* update HW Ctrl QP context */
553 base_addr = rdev_p->ctrl_qp.dma_addr;
554 base_addr >>= 12;
555 ctx0 = (V_EC_SIZE((1 << T3_CTRL_QP_SIZE_LOG2)) |
556 V_EC_BASE_LO((u32) base_addr & 0xffff));
557 ctx0 <<= 32;
558 ctx0 |= V_EC_CREDITS(FW_WR_NUM);
559 base_addr >>= 16;
560 ctx1 = (u32) base_addr;
561 base_addr >>= 32;
562 ctx1 |= ((u64) (V_EC_BASE_HI((u32) base_addr & 0xf) | V_EC_RESPQ(0) |
563 V_EC_TYPE(0) | V_EC_GEN(1) |
564 V_EC_UP_TOKEN(T3_CTL_QP_TID) | F_EC_VALID)) << 32;
565 wqe = (struct t3_modify_qp_wr *) skb_put(skb, sizeof(*wqe));
566 memset(wqe, 0, sizeof(*wqe));
567 build_fw_riwrh((struct fw_riwrh *) wqe, T3_WR_QP_MOD, 0, 0,
568 T3_CTL_QP_TID, 7, T3_SOPEOP);
569 wqe->flags = cpu_to_be32(MODQP_WRITE_EC);
570 sge_cmd = (3ULL << 56) | FW_RI_SGEEC_START << 8 | 3;
571 wqe->sge_cmd = cpu_to_be64(sge_cmd);
572 wqe->ctx1 = cpu_to_be64(ctx1);
573 wqe->ctx0 = cpu_to_be64(ctx0);
574 PDBG("CtrlQP dma_addr 0x%llx workq %p size %d\n",
575 (unsigned long long) rdev_p->ctrl_qp.dma_addr,
576 rdev_p->ctrl_qp.workq, 1 << T3_CTRL_QP_SIZE_LOG2);
577 skb->priority = CPL_PRIORITY_CONTROL;
578 return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);
579 err:
580 kfree_skb(skb);
581 return err;
582 }
583
584 static int cxio_hal_destroy_ctrl_qp(struct cxio_rdev *rdev_p)
585 {
586 dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
587 (1UL << T3_CTRL_QP_SIZE_LOG2)
588 * sizeof(union t3_wr), rdev_p->ctrl_qp.workq,
589 dma_unmap_addr(&rdev_p->ctrl_qp, mapping));
590 return cxio_hal_clear_qp_ctx(rdev_p, T3_CTRL_QP_ID);
591 }
592
593 /* write len bytes of data into addr (32B aligned address)
594 * If data is NULL, clear len byte of memory to zero.
595 * caller acquires the ctrl_qp lock before the call
596 */
597 static int cxio_hal_ctrl_qp_write_mem(struct cxio_rdev *rdev_p, u32 addr,
598 u32 len, void *data)
599 {
600 u32 i, nr_wqe, copy_len;
601 u8 *copy_data;
602 u8 wr_len, utx_len; /* length in 8 byte flit */
603 enum t3_wr_flags flag;
604 __be64 *wqe;
605 u64 utx_cmd;
606 addr &= 0x7FFFFFF;
607 nr_wqe = len % 96 ? len / 96 + 1 : len / 96; /* 96B max per WQE */
608 PDBG("%s wptr 0x%x rptr 0x%x len %d, nr_wqe %d data %p addr 0x%0x\n",
609 __func__, rdev_p->ctrl_qp.wptr, rdev_p->ctrl_qp.rptr, len,
610 nr_wqe, data, addr);
611 utx_len = 3; /* in 32B unit */
612 for (i = 0; i < nr_wqe; i++) {
613 if (Q_FULL(rdev_p->ctrl_qp.rptr, rdev_p->ctrl_qp.wptr,
614 T3_CTRL_QP_SIZE_LOG2)) {
615 PDBG("%s ctrl_qp full wtpr 0x%0x rptr 0x%0x, "
616 "wait for more space i %d\n", __func__,
617 rdev_p->ctrl_qp.wptr, rdev_p->ctrl_qp.rptr, i);
618 if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
619 !Q_FULL(rdev_p->ctrl_qp.rptr,
620 rdev_p->ctrl_qp.wptr,
621 T3_CTRL_QP_SIZE_LOG2))) {
622 PDBG("%s ctrl_qp workq interrupted\n",
623 __func__);
624 return -ERESTARTSYS;
625 }
626 PDBG("%s ctrl_qp wakeup, continue posting work request "
627 "i %d\n", __func__, i);
628 }
629 wqe = (__be64 *)(rdev_p->ctrl_qp.workq + (rdev_p->ctrl_qp.wptr %
630 (1 << T3_CTRL_QP_SIZE_LOG2)));
631 flag = 0;
632 if (i == (nr_wqe - 1)) {
633 /* last WQE */
634 flag = T3_COMPLETION_FLAG;
635 if (len % 32)
636 utx_len = len / 32 + 1;
637 else
638 utx_len = len / 32;
639 }
640
641 /*
642 * Force a CQE to return the credit to the workq in case
643 * we posted more than half the max QP size of WRs
644 */
645 if ((i != 0) &&
646 (i % (((1 << T3_CTRL_QP_SIZE_LOG2)) >> 1) == 0)) {
647 flag = T3_COMPLETION_FLAG;
648 PDBG("%s force completion at i %d\n", __func__, i);
649 }
650
651 /* build the utx mem command */
652 wqe += (sizeof(struct t3_bypass_wr) >> 3);
653 utx_cmd = (T3_UTX_MEM_WRITE << 28) | (addr + i * 3);
654 utx_cmd <<= 32;
655 utx_cmd |= (utx_len << 28) | ((utx_len << 2) + 1);
656 *wqe = cpu_to_be64(utx_cmd);
657 wqe++;
658 copy_data = (u8 *) data + i * 96;
659 copy_len = len > 96 ? 96 : len;
660
661 /* clear memory content if data is NULL */
662 if (data)
663 memcpy(wqe, copy_data, copy_len);
664 else
665 memset(wqe, 0, copy_len);
666 if (copy_len % 32)
667 memset(((u8 *) wqe) + copy_len, 0,
668 32 - (copy_len % 32));
669 wr_len = ((sizeof(struct t3_bypass_wr)) >> 3) + 1 +
670 (utx_len << 2);
671 wqe = (__be64 *)(rdev_p->ctrl_qp.workq + (rdev_p->ctrl_qp.wptr %
672 (1 << T3_CTRL_QP_SIZE_LOG2)));
673
674 /* wptr in the WRID[31:0] */
675 ((union t3_wrid *)(wqe+1))->id0.low = rdev_p->ctrl_qp.wptr;
676
677 /*
678 * This must be the last write with a memory barrier
679 * for the genbit
680 */
681 build_fw_riwrh((struct fw_riwrh *) wqe, T3_WR_BP, flag,
682 Q_GENBIT(rdev_p->ctrl_qp.wptr,
683 T3_CTRL_QP_SIZE_LOG2), T3_CTRL_QP_ID,
684 wr_len, T3_SOPEOP);
685 if (flag == T3_COMPLETION_FLAG)
686 ring_doorbell(rdev_p->ctrl_qp.doorbell, T3_CTRL_QP_ID);
687 len -= 96;
688 rdev_p->ctrl_qp.wptr++;
689 }
690 return 0;
691 }
692
693 /* IN: stag key, pdid, perm, zbva, to, len, page_size, pbl_size and pbl_addr
694 * OUT: stag index
695 * TBD: shared memory region support
696 */
697 static int __cxio_tpt_op(struct cxio_rdev *rdev_p, u32 reset_tpt_entry,
698 u32 *stag, u8 stag_state, u32 pdid,
699 enum tpt_mem_type type, enum tpt_mem_perm perm,
700 u32 zbva, u64 to, u32 len, u8 page_size,
701 u32 pbl_size, u32 pbl_addr)
702 {
703 int err;
704 struct tpt_entry tpt;
705 u32 stag_idx;
706 u32 wptr;
707
708 if (cxio_fatal_error(rdev_p))
709 return -EIO;
710
711 stag_state = stag_state > 0;
712 stag_idx = (*stag) >> 8;
713
714 if ((!reset_tpt_entry) && !(*stag != T3_STAG_UNSET)) {
715 stag_idx = cxio_hal_get_stag(rdev_p->rscp);
716 if (!stag_idx)
717 return -ENOMEM;
718 *stag = (stag_idx << 8) | ((*stag) & 0xFF);
719 }
720 PDBG("%s stag_state 0x%0x type 0x%0x pdid 0x%0x, stag_idx 0x%x\n",
721 __func__, stag_state, type, pdid, stag_idx);
722
723 mutex_lock(&rdev_p->ctrl_qp.lock);
724
725 /* write TPT entry */
726 if (reset_tpt_entry)
727 memset(&tpt, 0, sizeof(tpt));
728 else {
729 tpt.valid_stag_pdid = cpu_to_be32(F_TPT_VALID |
730 V_TPT_STAG_KEY((*stag) & M_TPT_STAG_KEY) |
731 V_TPT_STAG_STATE(stag_state) |
732 V_TPT_STAG_TYPE(type) | V_TPT_PDID(pdid));
733 BUG_ON(page_size >= 28);
734 tpt.flags_pagesize_qpid = cpu_to_be32(V_TPT_PERM(perm) |
735 ((perm & TPT_MW_BIND) ? F_TPT_MW_BIND_ENABLE : 0) |
736 V_TPT_ADDR_TYPE((zbva ? TPT_ZBTO : TPT_VATO)) |
737 V_TPT_PAGE_SIZE(page_size));
738 tpt.rsvd_pbl_addr = reset_tpt_entry ? 0 :
739 cpu_to_be32(V_TPT_PBL_ADDR(PBL_OFF(rdev_p, pbl_addr)>>3));
740 tpt.len = cpu_to_be32(len);
741 tpt.va_hi = cpu_to_be32((u32) (to >> 32));
742 tpt.va_low_or_fbo = cpu_to_be32((u32) (to & 0xFFFFFFFFULL));
743 tpt.rsvd_bind_cnt_or_pstag = 0;
744 tpt.rsvd_pbl_size = reset_tpt_entry ? 0 :
745 cpu_to_be32(V_TPT_PBL_SIZE(pbl_size >> 2));
746 }
747 err = cxio_hal_ctrl_qp_write_mem(rdev_p,
748 stag_idx +
749 (rdev_p->rnic_info.tpt_base >> 5),
750 sizeof(tpt), &tpt);
751
752 /* release the stag index to free pool */
753 if (reset_tpt_entry)
754 cxio_hal_put_stag(rdev_p->rscp, stag_idx);
755
756 wptr = rdev_p->ctrl_qp.wptr;
757 mutex_unlock(&rdev_p->ctrl_qp.lock);
758 if (!err)
759 if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
760 SEQ32_GE(rdev_p->ctrl_qp.rptr,
761 wptr)))
762 return -ERESTARTSYS;
763 return err;
764 }
765
766 int cxio_write_pbl(struct cxio_rdev *rdev_p, __be64 *pbl,
767 u32 pbl_addr, u32 pbl_size)
768 {
769 u32 wptr;
770 int err;
771
772 PDBG("%s *pdb_addr 0x%x, pbl_base 0x%x, pbl_size %d\n",
773 __func__, pbl_addr, rdev_p->rnic_info.pbl_base,
774 pbl_size);
775
776 mutex_lock(&rdev_p->ctrl_qp.lock);
777 err = cxio_hal_ctrl_qp_write_mem(rdev_p, pbl_addr >> 5, pbl_size << 3,
778 pbl);
779 wptr = rdev_p->ctrl_qp.wptr;
780 mutex_unlock(&rdev_p->ctrl_qp.lock);
781 if (err)
782 return err;
783
784 if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
785 SEQ32_GE(rdev_p->ctrl_qp.rptr,
786 wptr)))
787 return -ERESTARTSYS;
788
789 return 0;
790 }
791
792 int cxio_register_phys_mem(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid,
793 enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
794 u8 page_size, u32 pbl_size, u32 pbl_addr)
795 {
796 *stag = T3_STAG_UNSET;
797 return __cxio_tpt_op(rdev_p, 0, stag, 1, pdid, TPT_NON_SHARED_MR, perm,
798 zbva, to, len, page_size, pbl_size, pbl_addr);
799 }
800
801 int cxio_reregister_phys_mem(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid,
802 enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
803 u8 page_size, u32 pbl_size, u32 pbl_addr)
804 {
805 return __cxio_tpt_op(rdev_p, 0, stag, 1, pdid, TPT_NON_SHARED_MR, perm,
806 zbva, to, len, page_size, pbl_size, pbl_addr);
807 }
808
809 int cxio_dereg_mem(struct cxio_rdev *rdev_p, u32 stag, u32 pbl_size,
810 u32 pbl_addr)
811 {
812 return __cxio_tpt_op(rdev_p, 1, &stag, 0, 0, 0, 0, 0, 0ULL, 0, 0,
813 pbl_size, pbl_addr);
814 }
815
816 int cxio_allocate_window(struct cxio_rdev *rdev_p, u32 * stag, u32 pdid)
817 {
818 *stag = T3_STAG_UNSET;
819 return __cxio_tpt_op(rdev_p, 0, stag, 0, pdid, TPT_MW, 0, 0, 0ULL, 0, 0,
820 0, 0);
821 }
822
823 int cxio_deallocate_window(struct cxio_rdev *rdev_p, u32 stag)
824 {
825 return __cxio_tpt_op(rdev_p, 1, &stag, 0, 0, 0, 0, 0, 0ULL, 0, 0,
826 0, 0);
827 }
828
829 int cxio_allocate_stag(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid, u32 pbl_size, u32 pbl_addr)
830 {
831 *stag = T3_STAG_UNSET;
832 return __cxio_tpt_op(rdev_p, 0, stag, 0, pdid, TPT_NON_SHARED_MR,
833 0, 0, 0ULL, 0, 0, pbl_size, pbl_addr);
834 }
835
836 int cxio_rdma_init(struct cxio_rdev *rdev_p, struct t3_rdma_init_attr *attr)
837 {
838 struct t3_rdma_init_wr *wqe;
839 struct sk_buff *skb = alloc_skb(sizeof(*wqe), GFP_ATOMIC);
840 if (!skb)
841 return -ENOMEM;
842 PDBG("%s rdev_p %p\n", __func__, rdev_p);
843 wqe = (struct t3_rdma_init_wr *) __skb_put(skb, sizeof(*wqe));
844 wqe->wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_INIT));
845 wqe->wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(attr->tid) |
846 V_FW_RIWR_LEN(sizeof(*wqe) >> 3));
847 wqe->wrid.id1 = 0;
848 wqe->qpid = cpu_to_be32(attr->qpid);
849 wqe->pdid = cpu_to_be32(attr->pdid);
850 wqe->scqid = cpu_to_be32(attr->scqid);
851 wqe->rcqid = cpu_to_be32(attr->rcqid);
852 wqe->rq_addr = cpu_to_be32(attr->rq_addr - rdev_p->rnic_info.rqt_base);
853 wqe->rq_size = cpu_to_be32(attr->rq_size);
854 wqe->mpaattrs = attr->mpaattrs;
855 wqe->qpcaps = attr->qpcaps;
856 wqe->ulpdu_size = cpu_to_be16(attr->tcp_emss);
857 wqe->rqe_count = cpu_to_be16(attr->rqe_count);
858 wqe->flags_rtr_type = cpu_to_be16(attr->flags |
859 V_RTR_TYPE(attr->rtr_type) |
860 V_CHAN(attr->chan));
861 wqe->ord = cpu_to_be32(attr->ord);
862 wqe->ird = cpu_to_be32(attr->ird);
863 wqe->qp_dma_addr = cpu_to_be64(attr->qp_dma_addr);
864 wqe->qp_dma_size = cpu_to_be32(attr->qp_dma_size);
865 wqe->irs = cpu_to_be32(attr->irs);
866 skb->priority = 0; /* 0=>ToeQ; 1=>CtrlQ */
867 return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);
868 }
869
870 void cxio_register_ev_cb(cxio_hal_ev_callback_func_t ev_cb)
871 {
872 cxio_ev_cb = ev_cb;
873 }
874
875 void cxio_unregister_ev_cb(cxio_hal_ev_callback_func_t ev_cb)
876 {
877 cxio_ev_cb = NULL;
878 }
879
880 static int cxio_hal_ev_handler(struct t3cdev *t3cdev_p, struct sk_buff *skb)
881 {
882 static int cnt;
883 struct cxio_rdev *rdev_p = NULL;
884 struct respQ_msg_t *rsp_msg = (struct respQ_msg_t *) skb->data;
885 PDBG("%d: %s cq_id 0x%x cq_ptr 0x%x genbit %0x overflow %0x an %0x"
886 " se %0x notify %0x cqbranch %0x creditth %0x\n",
887 cnt, __func__, RSPQ_CQID(rsp_msg), RSPQ_CQPTR(rsp_msg),
888 RSPQ_GENBIT(rsp_msg), RSPQ_OVERFLOW(rsp_msg), RSPQ_AN(rsp_msg),
889 RSPQ_SE(rsp_msg), RSPQ_NOTIFY(rsp_msg), RSPQ_CQBRANCH(rsp_msg),
890 RSPQ_CREDIT_THRESH(rsp_msg));
891 PDBG("CQE: QPID 0x%0x genbit %0x type 0x%0x status 0x%0x opcode %d "
892 "len 0x%0x wrid_hi_stag 0x%x wrid_low_msn 0x%x\n",
893 CQE_QPID(rsp_msg->cqe), CQE_GENBIT(rsp_msg->cqe),
894 CQE_TYPE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
895 CQE_OPCODE(rsp_msg->cqe), CQE_LEN(rsp_msg->cqe),
896 CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));
897 rdev_p = (struct cxio_rdev *)t3cdev_p->ulp;
898 if (!rdev_p) {
899 PDBG("%s called by t3cdev %p with null ulp\n", __func__,
900 t3cdev_p);
901 return 0;
902 }
903 if (CQE_QPID(rsp_msg->cqe) == T3_CTRL_QP_ID) {
904 rdev_p->ctrl_qp.rptr = CQE_WRID_LOW(rsp_msg->cqe) + 1;
905 wake_up_interruptible(&rdev_p->ctrl_qp.waitq);
906 dev_kfree_skb_irq(skb);
907 } else if (CQE_QPID(rsp_msg->cqe) == 0xfff8)
908 dev_kfree_skb_irq(skb);
909 else if (cxio_ev_cb)
910 (*cxio_ev_cb) (rdev_p, skb);
911 else
912 dev_kfree_skb_irq(skb);
913 cnt++;
914 return 0;
915 }
916
917 /* Caller takes care of locking if needed */
918 int cxio_rdev_open(struct cxio_rdev *rdev_p)
919 {
920 struct net_device *netdev_p = NULL;
921 int err = 0;
922 if (strlen(rdev_p->dev_name)) {
923 if (cxio_hal_find_rdev_by_name(rdev_p->dev_name)) {
924 return -EBUSY;
925 }
926 netdev_p = dev_get_by_name(&init_net, rdev_p->dev_name);
927 if (!netdev_p) {
928 return -EINVAL;
929 }
930 dev_put(netdev_p);
931 } else if (rdev_p->t3cdev_p) {
932 if (cxio_hal_find_rdev_by_t3cdev(rdev_p->t3cdev_p)) {
933 return -EBUSY;
934 }
935 netdev_p = rdev_p->t3cdev_p->lldev;
936 strncpy(rdev_p->dev_name, rdev_p->t3cdev_p->name,
937 T3_MAX_DEV_NAME_LEN);
938 } else {
939 PDBG("%s t3cdev_p or dev_name must be set\n", __func__);
940 return -EINVAL;
941 }
942
943 list_add_tail(&rdev_p->entry, &rdev_list);
944
945 PDBG("%s opening rnic dev %s\n", __func__, rdev_p->dev_name);
946 memset(&rdev_p->ctrl_qp, 0, sizeof(rdev_p->ctrl_qp));
947 if (!rdev_p->t3cdev_p)
948 rdev_p->t3cdev_p = dev2t3cdev(netdev_p);
949 rdev_p->t3cdev_p->ulp = (void *) rdev_p;
950
951 err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, GET_EMBEDDED_INFO,
952 &(rdev_p->fw_info));
953 if (err) {
954 printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
955 __func__, rdev_p->t3cdev_p, err);
956 goto err1;
957 }
958 if (G_FW_VERSION_MAJOR(rdev_p->fw_info.fw_vers) != CXIO_FW_MAJ) {
959 printk(KERN_ERR MOD "fatal firmware version mismatch: "
960 "need version %u but adapter has version %u\n",
961 CXIO_FW_MAJ,
962 G_FW_VERSION_MAJOR(rdev_p->fw_info.fw_vers));
963 err = -EINVAL;
964 goto err1;
965 }
966
967 err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_GET_PARAMS,
968 &(rdev_p->rnic_info));
969 if (err) {
970 printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
971 __func__, rdev_p->t3cdev_p, err);
972 goto err1;
973 }
974 err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, GET_PORTS,
975 &(rdev_p->port_info));
976 if (err) {
977 printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
978 __func__, rdev_p->t3cdev_p, err);
979 goto err1;
980 }
981
982 /*
983 * qpshift is the number of bits to shift the qpid left in order
984 * to get the correct address of the doorbell for that qp.
985 */
986 cxio_init_ucontext(rdev_p, &rdev_p->uctx);
987 rdev_p->qpshift = PAGE_SHIFT -
988 ilog2(65536 >>
989 ilog2(rdev_p->rnic_info.udbell_len >>
990 PAGE_SHIFT));
991 rdev_p->qpnr = rdev_p->rnic_info.udbell_len >> PAGE_SHIFT;
992 rdev_p->qpmask = (65536 >> ilog2(rdev_p->qpnr)) - 1;
993 PDBG("%s rnic %s info: tpt_base 0x%0x tpt_top 0x%0x num stags %d "
994 "pbl_base 0x%0x pbl_top 0x%0x rqt_base 0x%0x, rqt_top 0x%0x\n",
995 __func__, rdev_p->dev_name, rdev_p->rnic_info.tpt_base,
996 rdev_p->rnic_info.tpt_top, cxio_num_stags(rdev_p),
997 rdev_p->rnic_info.pbl_base,
998 rdev_p->rnic_info.pbl_top, rdev_p->rnic_info.rqt_base,
999 rdev_p->rnic_info.rqt_top);
1000 PDBG("udbell_len 0x%0x udbell_physbase 0x%lx kdb_addr %p qpshift %lu "
1001 "qpnr %d qpmask 0x%x\n",
1002 rdev_p->rnic_info.udbell_len,
1003 rdev_p->rnic_info.udbell_physbase, rdev_p->rnic_info.kdb_addr,
1004 rdev_p->qpshift, rdev_p->qpnr, rdev_p->qpmask);
1005
1006 err = cxio_hal_init_ctrl_qp(rdev_p);
1007 if (err) {
1008 printk(KERN_ERR "%s error %d initializing ctrl_qp.\n",
1009 __func__, err);
1010 goto err1;
1011 }
1012 err = cxio_hal_init_resource(rdev_p, cxio_num_stags(rdev_p), 0,
1013 0, T3_MAX_NUM_QP, T3_MAX_NUM_CQ,
1014 T3_MAX_NUM_PD);
1015 if (err) {
1016 printk(KERN_ERR "%s error %d initializing hal resources.\n",
1017 __func__, err);
1018 goto err2;
1019 }
1020 err = cxio_hal_pblpool_create(rdev_p);
1021 if (err) {
1022 printk(KERN_ERR "%s error %d initializing pbl mem pool.\n",
1023 __func__, err);
1024 goto err3;
1025 }
1026 err = cxio_hal_rqtpool_create(rdev_p);
1027 if (err) {
1028 printk(KERN_ERR "%s error %d initializing rqt mem pool.\n",
1029 __func__, err);
1030 goto err4;
1031 }
1032 return 0;
1033 err4:
1034 cxio_hal_pblpool_destroy(rdev_p);
1035 err3:
1036 cxio_hal_destroy_resource(rdev_p->rscp);
1037 err2:
1038 cxio_hal_destroy_ctrl_qp(rdev_p);
1039 err1:
1040 rdev_p->t3cdev_p->ulp = NULL;
1041 list_del(&rdev_p->entry);
1042 return err;
1043 }
1044
1045 void cxio_rdev_close(struct cxio_rdev *rdev_p)
1046 {
1047 if (rdev_p) {
1048 cxio_hal_pblpool_destroy(rdev_p);
1049 cxio_hal_rqtpool_destroy(rdev_p);
1050 list_del(&rdev_p->entry);
1051 cxio_hal_destroy_ctrl_qp(rdev_p);
1052 cxio_hal_destroy_resource(rdev_p->rscp);
1053 rdev_p->t3cdev_p->ulp = NULL;
1054 }
1055 }
1056
1057 int __init cxio_hal_init(void)
1058 {
1059 if (cxio_hal_init_rhdl_resource(T3_MAX_NUM_RI))
1060 return -ENOMEM;
1061 t3_register_cpl_handler(CPL_ASYNC_NOTIF, cxio_hal_ev_handler);
1062 return 0;
1063 }
1064
1065 void __exit cxio_hal_exit(void)
1066 {
1067 struct cxio_rdev *rdev, *tmp;
1068
1069 t3_register_cpl_handler(CPL_ASYNC_NOTIF, NULL);
1070 list_for_each_entry_safe(rdev, tmp, &rdev_list, entry)
1071 cxio_rdev_close(rdev);
1072 cxio_hal_destroy_rhdl_resource();
1073 }
1074
1075 static void flush_completed_wrs(struct t3_wq *wq, struct t3_cq *cq)
1076 {
1077 struct t3_swsq *sqp;
1078 __u32 ptr = wq->sq_rptr;
1079 int count = Q_COUNT(wq->sq_rptr, wq->sq_wptr);
1080
1081 sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
1082 while (count--)
1083 if (!sqp->signaled) {
1084 ptr++;
1085 sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
1086 } else if (sqp->complete) {
1087
1088 /*
1089 * Insert this completed cqe into the swcq.
1090 */
1091 PDBG("%s moving cqe into swcq sq idx %ld cq idx %ld\n",
1092 __func__, Q_PTR2IDX(ptr, wq->sq_size_log2),
1093 Q_PTR2IDX(cq->sw_wptr, cq->size_log2));
1094 sqp->cqe.header |= htonl(V_CQE_SWCQE(1));
1095 *(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2))
1096 = sqp->cqe;
1097 cq->sw_wptr++;
1098 sqp->signaled = 0;
1099 break;
1100 } else
1101 break;
1102 }
1103
1104 static void create_read_req_cqe(struct t3_wq *wq, struct t3_cqe *hw_cqe,
1105 struct t3_cqe *read_cqe)
1106 {
1107 read_cqe->u.scqe.wrid_hi = wq->oldest_read->sq_wptr;
1108 read_cqe->len = wq->oldest_read->read_len;
1109 read_cqe->header = htonl(V_CQE_QPID(CQE_QPID(*hw_cqe)) |
1110 V_CQE_SWCQE(SW_CQE(*hw_cqe)) |
1111 V_CQE_OPCODE(T3_READ_REQ) |
1112 V_CQE_TYPE(1));
1113 }
1114
1115 /*
1116 * Return a ptr to the next read wr in the SWSQ or NULL.
1117 */
1118 static void advance_oldest_read(struct t3_wq *wq)
1119 {
1120
1121 u32 rptr = wq->oldest_read - wq->sq + 1;
1122 u32 wptr = Q_PTR2IDX(wq->sq_wptr, wq->sq_size_log2);
1123
1124 while (Q_PTR2IDX(rptr, wq->sq_size_log2) != wptr) {
1125 wq->oldest_read = wq->sq + Q_PTR2IDX(rptr, wq->sq_size_log2);
1126
1127 if (wq->oldest_read->opcode == T3_READ_REQ)
1128 return;
1129 rptr++;
1130 }
1131 wq->oldest_read = NULL;
1132 }
1133
1134 /*
1135 * cxio_poll_cq
1136 *
1137 * Caller must:
1138 * check the validity of the first CQE,
1139 * supply the wq assicated with the qpid.
1140 *
1141 * credit: cq credit to return to sge.
1142 * cqe_flushed: 1 iff the CQE is flushed.
1143 * cqe: copy of the polled CQE.
1144 *
1145 * return value:
1146 * 0 CQE returned,
1147 * -1 CQE skipped, try again.
1148 */
1149 int cxio_poll_cq(struct t3_wq *wq, struct t3_cq *cq, struct t3_cqe *cqe,
1150 u8 *cqe_flushed, u64 *cookie, u32 *credit)
1151 {
1152 int ret = 0;
1153 struct t3_cqe *hw_cqe, read_cqe;
1154
1155 *cqe_flushed = 0;
1156 *credit = 0;
1157 hw_cqe = cxio_next_cqe(cq);
1158
1159 PDBG("%s CQE OOO %d qpid 0x%0x genbit %d type %d status 0x%0x"
1160 " opcode 0x%0x len 0x%0x wrid_hi_stag 0x%x wrid_low_msn 0x%x\n",
1161 __func__, CQE_OOO(*hw_cqe), CQE_QPID(*hw_cqe),
1162 CQE_GENBIT(*hw_cqe), CQE_TYPE(*hw_cqe), CQE_STATUS(*hw_cqe),
1163 CQE_OPCODE(*hw_cqe), CQE_LEN(*hw_cqe), CQE_WRID_HI(*hw_cqe),
1164 CQE_WRID_LOW(*hw_cqe));
1165
1166 /*
1167 * skip cqe's not affiliated with a QP.
1168 */
1169 if (wq == NULL) {
1170 ret = -1;
1171 goto skip_cqe;
1172 }
1173
1174 /*
1175 * Gotta tweak READ completions:
1176 * 1) the cqe doesn't contain the sq_wptr from the wr.
1177 * 2) opcode not reflected from the wr.
1178 * 3) read_len not reflected from the wr.
1179 * 4) cq_type is RQ_TYPE not SQ_TYPE.
1180 */
1181 if (RQ_TYPE(*hw_cqe) && (CQE_OPCODE(*hw_cqe) == T3_READ_RESP)) {
1182
1183 /*
1184 * If this is an unsolicited read response, then the read
1185 * was generated by the kernel driver as part of peer-2-peer
1186 * connection setup. So ignore the completion.
1187 */
1188 if (!wq->oldest_read) {
1189 if (CQE_STATUS(*hw_cqe))
1190 wq->error = 1;
1191 ret = -1;
1192 goto skip_cqe;
1193 }
1194
1195 /*
1196 * Don't write to the HWCQ, so create a new read req CQE
1197 * in local memory.
1198 */
1199 create_read_req_cqe(wq, hw_cqe, &read_cqe);
1200 hw_cqe = &read_cqe;
1201 advance_oldest_read(wq);
1202 }
1203
1204 /*
1205 * T3A: Discard TERMINATE CQEs.
1206 */
1207 if (CQE_OPCODE(*hw_cqe) == T3_TERMINATE) {
1208 ret = -1;
1209 wq->error = 1;
1210 goto skip_cqe;
1211 }
1212
1213 if (CQE_STATUS(*hw_cqe) || wq->error) {
1214 *cqe_flushed = wq->error;
1215 wq->error = 1;
1216
1217 /*
1218 * T3A inserts errors into the CQE. We cannot return
1219 * these as work completions.
1220 */
1221 /* incoming write failures */
1222 if ((CQE_OPCODE(*hw_cqe) == T3_RDMA_WRITE)
1223 && RQ_TYPE(*hw_cqe)) {
1224 ret = -1;
1225 goto skip_cqe;
1226 }
1227 /* incoming read request failures */
1228 if ((CQE_OPCODE(*hw_cqe) == T3_READ_RESP) && SQ_TYPE(*hw_cqe)) {
1229 ret = -1;
1230 goto skip_cqe;
1231 }
1232
1233 /* incoming SEND with no receive posted failures */
1234 if (CQE_SEND_OPCODE(*hw_cqe) && RQ_TYPE(*hw_cqe) &&
1235 Q_EMPTY(wq->rq_rptr, wq->rq_wptr)) {
1236 ret = -1;
1237 goto skip_cqe;
1238 }
1239 BUG_ON((*cqe_flushed == 0) && !SW_CQE(*hw_cqe));
1240 goto proc_cqe;
1241 }
1242
1243 /*
1244 * RECV completion.
1245 */
1246 if (RQ_TYPE(*hw_cqe)) {
1247
1248 /*
1249 * HW only validates 4 bits of MSN. So we must validate that
1250 * the MSN in the SEND is the next expected MSN. If its not,
1251 * then we complete this with TPT_ERR_MSN and mark the wq in
1252 * error.
1253 */
1254
1255 if (Q_EMPTY(wq->rq_rptr, wq->rq_wptr)) {
1256 wq->error = 1;
1257 ret = -1;
1258 goto skip_cqe;
1259 }
1260
1261 if (unlikely((CQE_WRID_MSN(*hw_cqe) != (wq->rq_rptr + 1)))) {
1262 wq->error = 1;
1263 hw_cqe->header |= htonl(V_CQE_STATUS(TPT_ERR_MSN));
1264 goto proc_cqe;
1265 }
1266 goto proc_cqe;
1267 }
1268
1269 /*
1270 * If we get here its a send completion.
1271 *
1272 * Handle out of order completion. These get stuffed
1273 * in the SW SQ. Then the SW SQ is walked to move any
1274 * now in-order completions into the SW CQ. This handles
1275 * 2 cases:
1276 * 1) reaping unsignaled WRs when the first subsequent
1277 * signaled WR is completed.
1278 * 2) out of order read completions.
1279 */
1280 if (!SW_CQE(*hw_cqe) && (CQE_WRID_SQ_WPTR(*hw_cqe) != wq->sq_rptr)) {
1281 struct t3_swsq *sqp;
1282
1283 PDBG("%s out of order completion going in swsq at idx %ld\n",
1284 __func__,
1285 Q_PTR2IDX(CQE_WRID_SQ_WPTR(*hw_cqe), wq->sq_size_log2));
1286 sqp = wq->sq +
1287 Q_PTR2IDX(CQE_WRID_SQ_WPTR(*hw_cqe), wq->sq_size_log2);
1288 sqp->cqe = *hw_cqe;
1289 sqp->complete = 1;
1290 ret = -1;
1291 goto flush_wq;
1292 }
1293
1294 proc_cqe:
1295 *cqe = *hw_cqe;
1296
1297 /*
1298 * Reap the associated WR(s) that are freed up with this
1299 * completion.
1300 */
1301 if (SQ_TYPE(*hw_cqe)) {
1302 wq->sq_rptr = CQE_WRID_SQ_WPTR(*hw_cqe);
1303 PDBG("%s completing sq idx %ld\n", __func__,
1304 Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2));
1305 *cookie = wq->sq[Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2)].wr_id;
1306 wq->sq_rptr++;
1307 } else {
1308 PDBG("%s completing rq idx %ld\n", __func__,
1309 Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2));
1310 *cookie = wq->rq[Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2)].wr_id;
1311 if (wq->rq[Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2)].pbl_addr)
1312 cxio_hal_pblpool_free(wq->rdev,
1313 wq->rq[Q_PTR2IDX(wq->rq_rptr,
1314 wq->rq_size_log2)].pbl_addr, T3_STAG0_PBL_SIZE);
1315 BUG_ON(Q_EMPTY(wq->rq_rptr, wq->rq_wptr));
1316 wq->rq_rptr++;
1317 }
1318
1319 flush_wq:
1320 /*
1321 * Flush any completed cqes that are now in-order.
1322 */
1323 flush_completed_wrs(wq, cq);
1324
1325 skip_cqe:
1326 if (SW_CQE(*hw_cqe)) {
1327 PDBG("%s cq %p cqid 0x%x skip sw cqe sw_rptr 0x%x\n",
1328 __func__, cq, cq->cqid, cq->sw_rptr);
1329 ++cq->sw_rptr;
1330 } else {
1331 PDBG("%s cq %p cqid 0x%x skip hw cqe rptr 0x%x\n",
1332 __func__, cq, cq->cqid, cq->rptr);
1333 ++cq->rptr;
1334
1335 /*
1336 * T3A: compute credits.
1337 */
1338 if (((cq->rptr - cq->wptr) > (1 << (cq->size_log2 - 1)))
1339 || ((cq->rptr - cq->wptr) >= 128)) {
1340 *credit = cq->rptr - cq->wptr;
1341 cq->wptr = cq->rptr;
1342 }
1343 }
1344 return ret;
1345 }