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Staging: zram: fix up some sysfs attribute permissions
[zen-stable.git] / drivers / infiniband / hw / cxgb3 / cxio_hal.c
blob09dda0b8740eac9ee1a6d50ed536dec3a709a37d
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 int cxio_resize_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq)
193 {
194 struct rdma_cq_setup setup;
195 setup.id = cq->cqid;
196 setup.base_addr = (u64) (cq->dma_addr);
197 setup.size = 1UL << cq->size_log2;
198 setup.credits = setup.size;
199 setup.credit_thres = setup.size; /* TBD: overflow recovery */
200 setup.ovfl_mode = 1;
201 return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
202 }
203
204 static u32 get_qpid(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
205 {
206 struct cxio_qpid_list *entry;
207 u32 qpid;
208 int i;
209
210 mutex_lock(&uctx->lock);
211 if (!list_empty(&uctx->qpids)) {
212 entry = list_entry(uctx->qpids.next, struct cxio_qpid_list,
213 entry);
214 list_del(&entry->entry);
215 qpid = entry->qpid;
216 kfree(entry);
217 } else {
218 qpid = cxio_hal_get_qpid(rdev_p->rscp);
219 if (!qpid)
220 goto out;
221 for (i = qpid+1; i & rdev_p->qpmask; i++) {
222 entry = kmalloc(sizeof *entry, GFP_KERNEL);
223 if (!entry)
224 break;
225 entry->qpid = i;
226 list_add_tail(&entry->entry, &uctx->qpids);
227 }
228 }
229 out:
230 mutex_unlock(&uctx->lock);
231 PDBG("%s qpid 0x%x\n", __func__, qpid);
232 return qpid;
233 }
234
235 static void put_qpid(struct cxio_rdev *rdev_p, u32 qpid,
236 struct cxio_ucontext *uctx)
237 {
238 struct cxio_qpid_list *entry;
239
240 entry = kmalloc(sizeof *entry, GFP_KERNEL);
241 if (!entry)
242 return;
243 PDBG("%s qpid 0x%x\n", __func__, qpid);
244 entry->qpid = qpid;
245 mutex_lock(&uctx->lock);
246 list_add_tail(&entry->entry, &uctx->qpids);
247 mutex_unlock(&uctx->lock);
248 }
249
250 void cxio_release_ucontext(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
251 {
252 struct list_head *pos, *nxt;
253 struct cxio_qpid_list *entry;
254
255 mutex_lock(&uctx->lock);
256 list_for_each_safe(pos, nxt, &uctx->qpids) {
257 entry = list_entry(pos, struct cxio_qpid_list, entry);
258 list_del_init(&entry->entry);
259 if (!(entry->qpid & rdev_p->qpmask))
260 cxio_hal_put_qpid(rdev_p->rscp, entry->qpid);
261 kfree(entry);
262 }
263 mutex_unlock(&uctx->lock);
264 }
265
266 void cxio_init_ucontext(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
267 {
268 INIT_LIST_HEAD(&uctx->qpids);
269 mutex_init(&uctx->lock);
270 }
271
272 int cxio_create_qp(struct cxio_rdev *rdev_p, u32 kernel_domain,
273 struct t3_wq *wq, struct cxio_ucontext *uctx)
274 {
275 int depth = 1UL << wq->size_log2;
276 int rqsize = 1UL << wq->rq_size_log2;
277
278 wq->qpid = get_qpid(rdev_p, uctx);
279 if (!wq->qpid)
280 return -ENOMEM;
281
282 wq->rq = kzalloc(depth * sizeof(struct t3_swrq), GFP_KERNEL);
283 if (!wq->rq)
284 goto err1;
285
286 wq->rq_addr = cxio_hal_rqtpool_alloc(rdev_p, rqsize);
287 if (!wq->rq_addr)
288 goto err2;
289
290 wq->sq = kzalloc(depth * sizeof(struct t3_swsq), GFP_KERNEL);
291 if (!wq->sq)
292 goto err3;
293
294 wq->queue = dma_alloc_coherent(&(rdev_p->rnic_info.pdev->dev),
295 depth * sizeof(union t3_wr),
296 &(wq->dma_addr), GFP_KERNEL);
297 if (!wq->queue)
298 goto err4;
299
300 memset(wq->queue, 0, depth * sizeof(union t3_wr));
301 dma_unmap_addr_set(wq, mapping, wq->dma_addr);
302 wq->doorbell = (void __iomem *)rdev_p->rnic_info.kdb_addr;
303 if (!kernel_domain)
304 wq->udb = (u64)rdev_p->rnic_info.udbell_physbase +
305 (wq->qpid << rdev_p->qpshift);
306 wq->rdev = rdev_p;
307 PDBG("%s qpid 0x%x doorbell 0x%p udb 0x%llx\n", __func__,
308 wq->qpid, wq->doorbell, (unsigned long long) wq->udb);
309 return 0;
310 err4:
311 kfree(wq->sq);
312 err3:
313 cxio_hal_rqtpool_free(rdev_p, wq->rq_addr, rqsize);
314 err2:
315 kfree(wq->rq);
316 err1:
317 put_qpid(rdev_p, wq->qpid, uctx);
318 return -ENOMEM;
319 }
320
321 int cxio_destroy_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq)
322 {
323 int err;
324 err = cxio_hal_clear_cq_ctx(rdev_p, cq->cqid);
325 kfree(cq->sw_queue);
326 dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
327 (1UL << (cq->size_log2))
328 * sizeof(struct t3_cqe), cq->queue,
329 dma_unmap_addr(cq, mapping));
330 cxio_hal_put_cqid(rdev_p->rscp, cq->cqid);
331 return err;
332 }
333
334 int cxio_destroy_qp(struct cxio_rdev *rdev_p, struct t3_wq *wq,
335 struct cxio_ucontext *uctx)
336 {
337 dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
338 (1UL << (wq->size_log2))
339 * sizeof(union t3_wr), wq->queue,
340 dma_unmap_addr(wq, mapping));
341 kfree(wq->sq);
342 cxio_hal_rqtpool_free(rdev_p, wq->rq_addr, (1UL << wq->rq_size_log2));
343 kfree(wq->rq);
344 put_qpid(rdev_p, wq->qpid, uctx);
345 return 0;
346 }
347
348 static void insert_recv_cqe(struct t3_wq *wq, struct t3_cq *cq)
349 {
350 struct t3_cqe cqe;
351
352 PDBG("%s wq %p cq %p sw_rptr 0x%x sw_wptr 0x%x\n", __func__,
353 wq, cq, cq->sw_rptr, cq->sw_wptr);
354 memset(&cqe, 0, sizeof(cqe));
355 cqe.header = cpu_to_be32(V_CQE_STATUS(TPT_ERR_SWFLUSH) |
356 V_CQE_OPCODE(T3_SEND) |
357 V_CQE_TYPE(0) |
358 V_CQE_SWCQE(1) |
359 V_CQE_QPID(wq->qpid) |
360 V_CQE_GENBIT(Q_GENBIT(cq->sw_wptr,
361 cq->size_log2)));
362 *(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2)) = cqe;
363 cq->sw_wptr++;
364 }
365
366 int cxio_flush_rq(struct t3_wq *wq, struct t3_cq *cq, int count)
367 {
368 u32 ptr;
369 int flushed = 0;
370
371 PDBG("%s wq %p cq %p\n", __func__, wq, cq);
372
373 /* flush RQ */
374 PDBG("%s rq_rptr %u rq_wptr %u skip count %u\n", __func__,
375 wq->rq_rptr, wq->rq_wptr, count);
376 ptr = wq->rq_rptr + count;
377 while (ptr++ != wq->rq_wptr) {
378 insert_recv_cqe(wq, cq);
379 flushed++;
380 }
381 return flushed;
382 }
383
384 static void insert_sq_cqe(struct t3_wq *wq, struct t3_cq *cq,
385 struct t3_swsq *sqp)
386 {
387 struct t3_cqe cqe;
388
389 PDBG("%s wq %p cq %p sw_rptr 0x%x sw_wptr 0x%x\n", __func__,
390 wq, cq, cq->sw_rptr, cq->sw_wptr);
391 memset(&cqe, 0, sizeof(cqe));
392 cqe.header = cpu_to_be32(V_CQE_STATUS(TPT_ERR_SWFLUSH) |
393 V_CQE_OPCODE(sqp->opcode) |
394 V_CQE_TYPE(1) |
395 V_CQE_SWCQE(1) |
396 V_CQE_QPID(wq->qpid) |
397 V_CQE_GENBIT(Q_GENBIT(cq->sw_wptr,
398 cq->size_log2)));
399 cqe.u.scqe.wrid_hi = sqp->sq_wptr;
400
401 *(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2)) = cqe;
402 cq->sw_wptr++;
403 }
404
405 int cxio_flush_sq(struct t3_wq *wq, struct t3_cq *cq, int count)
406 {
407 __u32 ptr;
408 int flushed = 0;
409 struct t3_swsq *sqp = wq->sq + Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2);
410
411 ptr = wq->sq_rptr + count;
412 sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
413 while (ptr != wq->sq_wptr) {
414 sqp->signaled = 0;
415 insert_sq_cqe(wq, cq, sqp);
416 ptr++;
417 sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
418 flushed++;
419 }
420 return flushed;
421 }
422
423 /*
424 * Move all CQEs from the HWCQ into the SWCQ.
425 */
426 void cxio_flush_hw_cq(struct t3_cq *cq)
427 {
428 struct t3_cqe *cqe, *swcqe;
429
430 PDBG("%s cq %p cqid 0x%x\n", __func__, cq, cq->cqid);
431 cqe = cxio_next_hw_cqe(cq);
432 while (cqe) {
433 PDBG("%s flushing hwcq rptr 0x%x to swcq wptr 0x%x\n",
434 __func__, cq->rptr, cq->sw_wptr);
435 swcqe = cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2);
436 *swcqe = *cqe;
437 swcqe->header |= cpu_to_be32(V_CQE_SWCQE(1));
438 cq->sw_wptr++;
439 cq->rptr++;
440 cqe = cxio_next_hw_cqe(cq);
441 }
442 }
443
444 static int cqe_completes_wr(struct t3_cqe *cqe, struct t3_wq *wq)
445 {
446 if (CQE_OPCODE(*cqe) == T3_TERMINATE)
447 return 0;
448
449 if ((CQE_OPCODE(*cqe) == T3_RDMA_WRITE) && RQ_TYPE(*cqe))
450 return 0;
451
452 if ((CQE_OPCODE(*cqe) == T3_READ_RESP) && SQ_TYPE(*cqe))
453 return 0;
454
455 if (CQE_SEND_OPCODE(*cqe) && RQ_TYPE(*cqe) &&
456 Q_EMPTY(wq->rq_rptr, wq->rq_wptr))
457 return 0;
458
459 return 1;
460 }
461
462 void cxio_count_scqes(struct t3_cq *cq, struct t3_wq *wq, int *count)
463 {
464 struct t3_cqe *cqe;
465 u32 ptr;
466
467 *count = 0;
468 ptr = cq->sw_rptr;
469 while (!Q_EMPTY(ptr, cq->sw_wptr)) {
470 cqe = cq->sw_queue + (Q_PTR2IDX(ptr, cq->size_log2));
471 if ((SQ_TYPE(*cqe) ||
472 ((CQE_OPCODE(*cqe) == T3_READ_RESP) && wq->oldest_read)) &&
473 (CQE_QPID(*cqe) == wq->qpid))
474 (*count)++;
475 ptr++;
476 }
477 PDBG("%s cq %p count %d\n", __func__, cq, *count);
478 }
479
480 void cxio_count_rcqes(struct t3_cq *cq, struct t3_wq *wq, int *count)
481 {
482 struct t3_cqe *cqe;
483 u32 ptr;
484
485 *count = 0;
486 PDBG("%s count zero %d\n", __func__, *count);
487 ptr = cq->sw_rptr;
488 while (!Q_EMPTY(ptr, cq->sw_wptr)) {
489 cqe = cq->sw_queue + (Q_PTR2IDX(ptr, cq->size_log2));
490 if (RQ_TYPE(*cqe) && (CQE_OPCODE(*cqe) != T3_READ_RESP) &&
491 (CQE_QPID(*cqe) == wq->qpid) && cqe_completes_wr(cqe, wq))
492 (*count)++;
493 ptr++;
494 }
495 PDBG("%s cq %p count %d\n", __func__, cq, *count);
496 }
497
498 static int cxio_hal_init_ctrl_cq(struct cxio_rdev *rdev_p)
499 {
500 struct rdma_cq_setup setup;
501 setup.id = 0;
502 setup.base_addr = 0; /* NULL address */
503 setup.size = 1; /* enable the CQ */
504 setup.credits = 0;
505
506 /* force SGE to redirect to RspQ and interrupt */
507 setup.credit_thres = 0;
508 setup.ovfl_mode = 1;
509 return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
510 }
511
512 static int cxio_hal_init_ctrl_qp(struct cxio_rdev *rdev_p)
513 {
514 int err;
515 u64 sge_cmd, ctx0, ctx1;
516 u64 base_addr;
517 struct t3_modify_qp_wr *wqe;
518 struct sk_buff *skb;
519
520 skb = alloc_skb(sizeof(*wqe), GFP_KERNEL);
521 if (!skb) {
522 PDBG("%s alloc_skb failed\n", __func__);
523 return -ENOMEM;
524 }
525 err = cxio_hal_init_ctrl_cq(rdev_p);
526 if (err) {
527 PDBG("%s err %d initializing ctrl_cq\n", __func__, err);
528 goto err;
529 }
530 rdev_p->ctrl_qp.workq = dma_alloc_coherent(
531 &(rdev_p->rnic_info.pdev->dev),
532 (1 << T3_CTRL_QP_SIZE_LOG2) *
533 sizeof(union t3_wr),
534 &(rdev_p->ctrl_qp.dma_addr),
535 GFP_KERNEL);
536 if (!rdev_p->ctrl_qp.workq) {
537 PDBG("%s dma_alloc_coherent failed\n", __func__);
538 err = -ENOMEM;
539 goto err;
540 }
541 dma_unmap_addr_set(&rdev_p->ctrl_qp, mapping,
542 rdev_p->ctrl_qp.dma_addr);
543 rdev_p->ctrl_qp.doorbell = (void __iomem *)rdev_p->rnic_info.kdb_addr;
544 memset(rdev_p->ctrl_qp.workq, 0,
545 (1 << T3_CTRL_QP_SIZE_LOG2) * sizeof(union t3_wr));
546
547 mutex_init(&rdev_p->ctrl_qp.lock);
548 init_waitqueue_head(&rdev_p->ctrl_qp.waitq);
549
550 /* update HW Ctrl QP context */
551 base_addr = rdev_p->ctrl_qp.dma_addr;
552 base_addr >>= 12;
553 ctx0 = (V_EC_SIZE((1 << T3_CTRL_QP_SIZE_LOG2)) |
554 V_EC_BASE_LO((u32) base_addr & 0xffff));
555 ctx0 <<= 32;
556 ctx0 |= V_EC_CREDITS(FW_WR_NUM);
557 base_addr >>= 16;
558 ctx1 = (u32) base_addr;
559 base_addr >>= 32;
560 ctx1 |= ((u64) (V_EC_BASE_HI((u32) base_addr & 0xf) | V_EC_RESPQ(0) |
561 V_EC_TYPE(0) | V_EC_GEN(1) |
562 V_EC_UP_TOKEN(T3_CTL_QP_TID) | F_EC_VALID)) << 32;
563 wqe = (struct t3_modify_qp_wr *) skb_put(skb, sizeof(*wqe));
564 memset(wqe, 0, sizeof(*wqe));
565 build_fw_riwrh((struct fw_riwrh *) wqe, T3_WR_QP_MOD, 0, 0,
566 T3_CTL_QP_TID, 7, T3_SOPEOP);
567 wqe->flags = cpu_to_be32(MODQP_WRITE_EC);
568 sge_cmd = (3ULL << 56) | FW_RI_SGEEC_START << 8 | 3;
569 wqe->sge_cmd = cpu_to_be64(sge_cmd);
570 wqe->ctx1 = cpu_to_be64(ctx1);
571 wqe->ctx0 = cpu_to_be64(ctx0);
572 PDBG("CtrlQP dma_addr 0x%llx workq %p size %d\n",
573 (unsigned long long) rdev_p->ctrl_qp.dma_addr,
574 rdev_p->ctrl_qp.workq, 1 << T3_CTRL_QP_SIZE_LOG2);
575 skb->priority = CPL_PRIORITY_CONTROL;
576 return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);
577 err:
578 kfree_skb(skb);
579 return err;
580 }
581
582 static int cxio_hal_destroy_ctrl_qp(struct cxio_rdev *rdev_p)
583 {
584 dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
585 (1UL << T3_CTRL_QP_SIZE_LOG2)
586 * sizeof(union t3_wr), rdev_p->ctrl_qp.workq,
587 dma_unmap_addr(&rdev_p->ctrl_qp, mapping));
588 return cxio_hal_clear_qp_ctx(rdev_p, T3_CTRL_QP_ID);
589 }
590
591 /* write len bytes of data into addr (32B aligned address)
592 * If data is NULL, clear len byte of memory to zero.
593 * caller acquires the ctrl_qp lock before the call
594 */
595 static int cxio_hal_ctrl_qp_write_mem(struct cxio_rdev *rdev_p, u32 addr,
596 u32 len, void *data)
597 {
598 u32 i, nr_wqe, copy_len;
599 u8 *copy_data;
600 u8 wr_len, utx_len; /* length in 8 byte flit */
601 enum t3_wr_flags flag;
602 __be64 *wqe;
603 u64 utx_cmd;
604 addr &= 0x7FFFFFF;
605 nr_wqe = len % 96 ? len / 96 + 1 : len / 96; /* 96B max per WQE */
606 PDBG("%s wptr 0x%x rptr 0x%x len %d, nr_wqe %d data %p addr 0x%0x\n",
607 __func__, rdev_p->ctrl_qp.wptr, rdev_p->ctrl_qp.rptr, len,
608 nr_wqe, data, addr);
609 utx_len = 3; /* in 32B unit */
610 for (i = 0; i < nr_wqe; i++) {
611 if (Q_FULL(rdev_p->ctrl_qp.rptr, rdev_p->ctrl_qp.wptr,
612 T3_CTRL_QP_SIZE_LOG2)) {
613 PDBG("%s ctrl_qp full wtpr 0x%0x rptr 0x%0x, "
614 "wait for more space i %d\n", __func__,
615 rdev_p->ctrl_qp.wptr, rdev_p->ctrl_qp.rptr, i);
616 if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
617 !Q_FULL(rdev_p->ctrl_qp.rptr,
618 rdev_p->ctrl_qp.wptr,
619 T3_CTRL_QP_SIZE_LOG2))) {
620 PDBG("%s ctrl_qp workq interrupted\n",
621 __func__);
622 return -ERESTARTSYS;
623 }
624 PDBG("%s ctrl_qp wakeup, continue posting work request "
625 "i %d\n", __func__, i);
626 }
627 wqe = (__be64 *)(rdev_p->ctrl_qp.workq + (rdev_p->ctrl_qp.wptr %
628 (1 << T3_CTRL_QP_SIZE_LOG2)));
629 flag = 0;
630 if (i == (nr_wqe - 1)) {
631 /* last WQE */
632 flag = T3_COMPLETION_FLAG;
633 if (len % 32)
634 utx_len = len / 32 + 1;
635 else
636 utx_len = len / 32;
637 }
638
639 /*
640 * Force a CQE to return the credit to the workq in case
641 * we posted more than half the max QP size of WRs
642 */
643 if ((i != 0) &&
644 (i % (((1 << T3_CTRL_QP_SIZE_LOG2)) >> 1) == 0)) {
645 flag = T3_COMPLETION_FLAG;
646 PDBG("%s force completion at i %d\n", __func__, i);
647 }
648
649 /* build the utx mem command */
650 wqe += (sizeof(struct t3_bypass_wr) >> 3);
651 utx_cmd = (T3_UTX_MEM_WRITE << 28) | (addr + i * 3);
652 utx_cmd <<= 32;
653 utx_cmd |= (utx_len << 28) | ((utx_len << 2) + 1);
654 *wqe = cpu_to_be64(utx_cmd);
655 wqe++;
656 copy_data = (u8 *) data + i * 96;
657 copy_len = len > 96 ? 96 : len;
658
659 /* clear memory content if data is NULL */
660 if (data)
661 memcpy(wqe, copy_data, copy_len);
662 else
663 memset(wqe, 0, copy_len);
664 if (copy_len % 32)
665 memset(((u8 *) wqe) + copy_len, 0,
666 32 - (copy_len % 32));
667 wr_len = ((sizeof(struct t3_bypass_wr)) >> 3) + 1 +
668 (utx_len << 2);
669 wqe = (__be64 *)(rdev_p->ctrl_qp.workq + (rdev_p->ctrl_qp.wptr %
670 (1 << T3_CTRL_QP_SIZE_LOG2)));
671
672 /* wptr in the WRID[31:0] */
673 ((union t3_wrid *)(wqe+1))->id0.low = rdev_p->ctrl_qp.wptr;
674
675 /*
676 * This must be the last write with a memory barrier
677 * for the genbit
678 */
679 build_fw_riwrh((struct fw_riwrh *) wqe, T3_WR_BP, flag,
680 Q_GENBIT(rdev_p->ctrl_qp.wptr,
681 T3_CTRL_QP_SIZE_LOG2), T3_CTRL_QP_ID,
682 wr_len, T3_SOPEOP);
683 if (flag == T3_COMPLETION_FLAG)
684 ring_doorbell(rdev_p->ctrl_qp.doorbell, T3_CTRL_QP_ID);
685 len -= 96;
686 rdev_p->ctrl_qp.wptr++;
687 }
688 return 0;
689 }
690
691 /* IN: stag key, pdid, perm, zbva, to, len, page_size, pbl_size and pbl_addr
692 * OUT: stag index
693 * TBD: shared memory region support
694 */
695 static int __cxio_tpt_op(struct cxio_rdev *rdev_p, u32 reset_tpt_entry,
696 u32 *stag, u8 stag_state, u32 pdid,
697 enum tpt_mem_type type, enum tpt_mem_perm perm,
698 u32 zbva, u64 to, u32 len, u8 page_size,
699 u32 pbl_size, u32 pbl_addr)
700 {
701 int err;
702 struct tpt_entry tpt;
703 u32 stag_idx;
704 u32 wptr;
705
706 if (cxio_fatal_error(rdev_p))
707 return -EIO;
708
709 stag_state = stag_state > 0;
710 stag_idx = (*stag) >> 8;
711
712 if ((!reset_tpt_entry) && !(*stag != T3_STAG_UNSET)) {
713 stag_idx = cxio_hal_get_stag(rdev_p->rscp);
714 if (!stag_idx)
715 return -ENOMEM;
716 *stag = (stag_idx << 8) | ((*stag) & 0xFF);
717 }
718 PDBG("%s stag_state 0x%0x type 0x%0x pdid 0x%0x, stag_idx 0x%x\n",
719 __func__, stag_state, type, pdid, stag_idx);
720
721 mutex_lock(&rdev_p->ctrl_qp.lock);
722
723 /* write TPT entry */
724 if (reset_tpt_entry)
725 memset(&tpt, 0, sizeof(tpt));
726 else {
727 tpt.valid_stag_pdid = cpu_to_be32(F_TPT_VALID |
728 V_TPT_STAG_KEY((*stag) & M_TPT_STAG_KEY) |
729 V_TPT_STAG_STATE(stag_state) |
730 V_TPT_STAG_TYPE(type) | V_TPT_PDID(pdid));
731 BUG_ON(page_size >= 28);
732 tpt.flags_pagesize_qpid = cpu_to_be32(V_TPT_PERM(perm) |
733 ((perm & TPT_MW_BIND) ? F_TPT_MW_BIND_ENABLE : 0) |
734 V_TPT_ADDR_TYPE((zbva ? TPT_ZBTO : TPT_VATO)) |
735 V_TPT_PAGE_SIZE(page_size));
736 tpt.rsvd_pbl_addr = reset_tpt_entry ? 0 :
737 cpu_to_be32(V_TPT_PBL_ADDR(PBL_OFF(rdev_p, pbl_addr)>>3));
738 tpt.len = cpu_to_be32(len);
739 tpt.va_hi = cpu_to_be32((u32) (to >> 32));
740 tpt.va_low_or_fbo = cpu_to_be32((u32) (to & 0xFFFFFFFFULL));
741 tpt.rsvd_bind_cnt_or_pstag = 0;
742 tpt.rsvd_pbl_size = reset_tpt_entry ? 0 :
743 cpu_to_be32(V_TPT_PBL_SIZE(pbl_size >> 2));
744 }
745 err = cxio_hal_ctrl_qp_write_mem(rdev_p,
746 stag_idx +
747 (rdev_p->rnic_info.tpt_base >> 5),
748 sizeof(tpt), &tpt);
749
750 /* release the stag index to free pool */
751 if (reset_tpt_entry)
752 cxio_hal_put_stag(rdev_p->rscp, stag_idx);
753
754 wptr = rdev_p->ctrl_qp.wptr;
755 mutex_unlock(&rdev_p->ctrl_qp.lock);
756 if (!err)
757 if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
758 SEQ32_GE(rdev_p->ctrl_qp.rptr,
759 wptr)))
760 return -ERESTARTSYS;
761 return err;
762 }
763
764 int cxio_write_pbl(struct cxio_rdev *rdev_p, __be64 *pbl,
765 u32 pbl_addr, u32 pbl_size)
766 {
767 u32 wptr;
768 int err;
769
770 PDBG("%s *pdb_addr 0x%x, pbl_base 0x%x, pbl_size %d\n",
771 __func__, pbl_addr, rdev_p->rnic_info.pbl_base,
772 pbl_size);
773
774 mutex_lock(&rdev_p->ctrl_qp.lock);
775 err = cxio_hal_ctrl_qp_write_mem(rdev_p, pbl_addr >> 5, pbl_size << 3,
776 pbl);
777 wptr = rdev_p->ctrl_qp.wptr;
778 mutex_unlock(&rdev_p->ctrl_qp.lock);
779 if (err)
780 return err;
781
782 if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
783 SEQ32_GE(rdev_p->ctrl_qp.rptr,
784 wptr)))
785 return -ERESTARTSYS;
786
787 return 0;
788 }
789
790 int cxio_register_phys_mem(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid,
791 enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
792 u8 page_size, u32 pbl_size, u32 pbl_addr)
793 {
794 *stag = T3_STAG_UNSET;
795 return __cxio_tpt_op(rdev_p, 0, stag, 1, pdid, TPT_NON_SHARED_MR, perm,
796 zbva, to, len, page_size, pbl_size, pbl_addr);
797 }
798
799 int cxio_reregister_phys_mem(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid,
800 enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
801 u8 page_size, u32 pbl_size, u32 pbl_addr)
802 {
803 return __cxio_tpt_op(rdev_p, 0, stag, 1, pdid, TPT_NON_SHARED_MR, perm,
804 zbva, to, len, page_size, pbl_size, pbl_addr);
805 }
806
807 int cxio_dereg_mem(struct cxio_rdev *rdev_p, u32 stag, u32 pbl_size,
808 u32 pbl_addr)
809 {
810 return __cxio_tpt_op(rdev_p, 1, &stag, 0, 0, 0, 0, 0, 0ULL, 0, 0,
811 pbl_size, pbl_addr);
812 }
813
814 int cxio_allocate_window(struct cxio_rdev *rdev_p, u32 * stag, u32 pdid)
815 {
816 *stag = T3_STAG_UNSET;
817 return __cxio_tpt_op(rdev_p, 0, stag, 0, pdid, TPT_MW, 0, 0, 0ULL, 0, 0,
818 0, 0);
819 }
820
821 int cxio_deallocate_window(struct cxio_rdev *rdev_p, u32 stag)
822 {
823 return __cxio_tpt_op(rdev_p, 1, &stag, 0, 0, 0, 0, 0, 0ULL, 0, 0,
824 0, 0);
825 }
826
827 int cxio_allocate_stag(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid, u32 pbl_size, u32 pbl_addr)
828 {
829 *stag = T3_STAG_UNSET;
830 return __cxio_tpt_op(rdev_p, 0, stag, 0, pdid, TPT_NON_SHARED_MR,
831 0, 0, 0ULL, 0, 0, pbl_size, pbl_addr);
832 }
833
834 int cxio_rdma_init(struct cxio_rdev *rdev_p, struct t3_rdma_init_attr *attr)
835 {
836 struct t3_rdma_init_wr *wqe;
837 struct sk_buff *skb = alloc_skb(sizeof(*wqe), GFP_ATOMIC);
838 if (!skb)
839 return -ENOMEM;
840 PDBG("%s rdev_p %p\n", __func__, rdev_p);
841 wqe = (struct t3_rdma_init_wr *) __skb_put(skb, sizeof(*wqe));
842 wqe->wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_INIT));
843 wqe->wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(attr->tid) |
844 V_FW_RIWR_LEN(sizeof(*wqe) >> 3));
845 wqe->wrid.id1 = 0;
846 wqe->qpid = cpu_to_be32(attr->qpid);
847 wqe->pdid = cpu_to_be32(attr->pdid);
848 wqe->scqid = cpu_to_be32(attr->scqid);
849 wqe->rcqid = cpu_to_be32(attr->rcqid);
850 wqe->rq_addr = cpu_to_be32(attr->rq_addr - rdev_p->rnic_info.rqt_base);
851 wqe->rq_size = cpu_to_be32(attr->rq_size);
852 wqe->mpaattrs = attr->mpaattrs;
853 wqe->qpcaps = attr->qpcaps;
854 wqe->ulpdu_size = cpu_to_be16(attr->tcp_emss);
855 wqe->rqe_count = cpu_to_be16(attr->rqe_count);
856 wqe->flags_rtr_type = cpu_to_be16(attr->flags |
857 V_RTR_TYPE(attr->rtr_type) |
858 V_CHAN(attr->chan));
859 wqe->ord = cpu_to_be32(attr->ord);
860 wqe->ird = cpu_to_be32(attr->ird);
861 wqe->qp_dma_addr = cpu_to_be64(attr->qp_dma_addr);
862 wqe->qp_dma_size = cpu_to_be32(attr->qp_dma_size);
863 wqe->irs = cpu_to_be32(attr->irs);
864 skb->priority = 0; /* 0=>ToeQ; 1=>CtrlQ */
865 return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);
866 }
867
868 void cxio_register_ev_cb(cxio_hal_ev_callback_func_t ev_cb)
869 {
870 cxio_ev_cb = ev_cb;
871 }
872
873 void cxio_unregister_ev_cb(cxio_hal_ev_callback_func_t ev_cb)
874 {
875 cxio_ev_cb = NULL;
876 }
877
878 static int cxio_hal_ev_handler(struct t3cdev *t3cdev_p, struct sk_buff *skb)
879 {
880 static int cnt;
881 struct cxio_rdev *rdev_p = NULL;
882 struct respQ_msg_t *rsp_msg = (struct respQ_msg_t *) skb->data;
883 PDBG("%d: %s cq_id 0x%x cq_ptr 0x%x genbit %0x overflow %0x an %0x"
884 " se %0x notify %0x cqbranch %0x creditth %0x\n",
885 cnt, __func__, RSPQ_CQID(rsp_msg), RSPQ_CQPTR(rsp_msg),
886 RSPQ_GENBIT(rsp_msg), RSPQ_OVERFLOW(rsp_msg), RSPQ_AN(rsp_msg),
887 RSPQ_SE(rsp_msg), RSPQ_NOTIFY(rsp_msg), RSPQ_CQBRANCH(rsp_msg),
888 RSPQ_CREDIT_THRESH(rsp_msg));
889 PDBG("CQE: QPID 0x%0x genbit %0x type 0x%0x status 0x%0x opcode %d "
890 "len 0x%0x wrid_hi_stag 0x%x wrid_low_msn 0x%x\n",
891 CQE_QPID(rsp_msg->cqe), CQE_GENBIT(rsp_msg->cqe),
892 CQE_TYPE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
893 CQE_OPCODE(rsp_msg->cqe), CQE_LEN(rsp_msg->cqe),
894 CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));
895 rdev_p = (struct cxio_rdev *)t3cdev_p->ulp;
896 if (!rdev_p) {
897 PDBG("%s called by t3cdev %p with null ulp\n", __func__,
898 t3cdev_p);
899 return 0;
900 }
901 if (CQE_QPID(rsp_msg->cqe) == T3_CTRL_QP_ID) {
902 rdev_p->ctrl_qp.rptr = CQE_WRID_LOW(rsp_msg->cqe) + 1;
903 wake_up_interruptible(&rdev_p->ctrl_qp.waitq);
904 dev_kfree_skb_irq(skb);
905 } else if (CQE_QPID(rsp_msg->cqe) == 0xfff8)
906 dev_kfree_skb_irq(skb);
907 else if (cxio_ev_cb)
908 (*cxio_ev_cb) (rdev_p, skb);
909 else
910 dev_kfree_skb_irq(skb);
911 cnt++;
912 return 0;
913 }
914
915 /* Caller takes care of locking if needed */
916 int cxio_rdev_open(struct cxio_rdev *rdev_p)
917 {
918 struct net_device *netdev_p = NULL;
919 int err = 0;
920 if (strlen(rdev_p->dev_name)) {
921 if (cxio_hal_find_rdev_by_name(rdev_p->dev_name)) {
922 return -EBUSY;
923 }
924 netdev_p = dev_get_by_name(&init_net, rdev_p->dev_name);
925 if (!netdev_p) {
926 return -EINVAL;
927 }
928 dev_put(netdev_p);
929 } else if (rdev_p->t3cdev_p) {
930 if (cxio_hal_find_rdev_by_t3cdev(rdev_p->t3cdev_p)) {
931 return -EBUSY;
932 }
933 netdev_p = rdev_p->t3cdev_p->lldev;
934 strncpy(rdev_p->dev_name, rdev_p->t3cdev_p->name,
935 T3_MAX_DEV_NAME_LEN);
936 } else {
937 PDBG("%s t3cdev_p or dev_name must be set\n", __func__);
938 return -EINVAL;
939 }
940
941 list_add_tail(&rdev_p->entry, &rdev_list);
942
943 PDBG("%s opening rnic dev %s\n", __func__, rdev_p->dev_name);
944 memset(&rdev_p->ctrl_qp, 0, sizeof(rdev_p->ctrl_qp));
945 if (!rdev_p->t3cdev_p)
946 rdev_p->t3cdev_p = dev2t3cdev(netdev_p);
947 rdev_p->t3cdev_p->ulp = (void *) rdev_p;
948
949 err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, GET_EMBEDDED_INFO,
950 &(rdev_p->fw_info));
951 if (err) {
952 printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
953 __func__, rdev_p->t3cdev_p, err);
954 goto err1;
955 }
956 if (G_FW_VERSION_MAJOR(rdev_p->fw_info.fw_vers) != CXIO_FW_MAJ) {
957 printk(KERN_ERR MOD "fatal firmware version mismatch: "
958 "need version %u but adapter has version %u\n",
959 CXIO_FW_MAJ,
960 G_FW_VERSION_MAJOR(rdev_p->fw_info.fw_vers));
961 err = -EINVAL;
962 goto err1;
963 }
964
965 err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_GET_PARAMS,
966 &(rdev_p->rnic_info));
967 if (err) {
968 printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
969 __func__, rdev_p->t3cdev_p, err);
970 goto err1;
971 }
972 err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, GET_PORTS,
973 &(rdev_p->port_info));
974 if (err) {
975 printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
976 __func__, rdev_p->t3cdev_p, err);
977 goto err1;
978 }
979
980 /*
981 * qpshift is the number of bits to shift the qpid left in order
982 * to get the correct address of the doorbell for that qp.
983 */
984 cxio_init_ucontext(rdev_p, &rdev_p->uctx);
985 rdev_p->qpshift = PAGE_SHIFT -
986 ilog2(65536 >>
987 ilog2(rdev_p->rnic_info.udbell_len >>
988 PAGE_SHIFT));
989 rdev_p->qpnr = rdev_p->rnic_info.udbell_len >> PAGE_SHIFT;
990 rdev_p->qpmask = (65536 >> ilog2(rdev_p->qpnr)) - 1;
991 PDBG("%s rnic %s info: tpt_base 0x%0x tpt_top 0x%0x num stags %d "
992 "pbl_base 0x%0x pbl_top 0x%0x rqt_base 0x%0x, rqt_top 0x%0x\n",
993 __func__, rdev_p->dev_name, rdev_p->rnic_info.tpt_base,
994 rdev_p->rnic_info.tpt_top, cxio_num_stags(rdev_p),
995 rdev_p->rnic_info.pbl_base,
996 rdev_p->rnic_info.pbl_top, rdev_p->rnic_info.rqt_base,
997 rdev_p->rnic_info.rqt_top);
998 PDBG("udbell_len 0x%0x udbell_physbase 0x%lx kdb_addr %p qpshift %lu "
999 "qpnr %d qpmask 0x%x\n",
1000 rdev_p->rnic_info.udbell_len,
1001 rdev_p->rnic_info.udbell_physbase, rdev_p->rnic_info.kdb_addr,
1002 rdev_p->qpshift, rdev_p->qpnr, rdev_p->qpmask);
1003
1004 err = cxio_hal_init_ctrl_qp(rdev_p);
1005 if (err) {
1006 printk(KERN_ERR "%s error %d initializing ctrl_qp.\n",
1007 __func__, err);
1008 goto err1;
1009 }
1010 err = cxio_hal_init_resource(rdev_p, cxio_num_stags(rdev_p), 0,
1011 0, T3_MAX_NUM_QP, T3_MAX_NUM_CQ,
1012 T3_MAX_NUM_PD);
1013 if (err) {
1014 printk(KERN_ERR "%s error %d initializing hal resources.\n",
1015 __func__, err);
1016 goto err2;
1017 }
1018 err = cxio_hal_pblpool_create(rdev_p);
1019 if (err) {
1020 printk(KERN_ERR "%s error %d initializing pbl mem pool.\n",
1021 __func__, err);
1022 goto err3;
1023 }
1024 err = cxio_hal_rqtpool_create(rdev_p);
1025 if (err) {
1026 printk(KERN_ERR "%s error %d initializing rqt mem pool.\n",
1027 __func__, err);
1028 goto err4;
1029 }
1030 return 0;
1031 err4:
1032 cxio_hal_pblpool_destroy(rdev_p);
1033 err3:
1034 cxio_hal_destroy_resource(rdev_p->rscp);
1035 err2:
1036 cxio_hal_destroy_ctrl_qp(rdev_p);
1037 err1:
1038 rdev_p->t3cdev_p->ulp = NULL;
1039 list_del(&rdev_p->entry);
1040 return err;
1041 }
1042
1043 void cxio_rdev_close(struct cxio_rdev *rdev_p)
1044 {
1045 if (rdev_p) {
1046 cxio_hal_pblpool_destroy(rdev_p);
1047 cxio_hal_rqtpool_destroy(rdev_p);
1048 list_del(&rdev_p->entry);
1049 cxio_hal_destroy_ctrl_qp(rdev_p);
1050 cxio_hal_destroy_resource(rdev_p->rscp);
1051 rdev_p->t3cdev_p->ulp = NULL;
1052 }
1053 }
1054
1055 int __init cxio_hal_init(void)
1056 {
1057 if (cxio_hal_init_rhdl_resource(T3_MAX_NUM_RI))
1058 return -ENOMEM;
1059 t3_register_cpl_handler(CPL_ASYNC_NOTIF, cxio_hal_ev_handler);
1060 return 0;
1061 }
1062
1063 void __exit cxio_hal_exit(void)
1064 {
1065 struct cxio_rdev *rdev, *tmp;
1066
1067 t3_register_cpl_handler(CPL_ASYNC_NOTIF, NULL);
1068 list_for_each_entry_safe(rdev, tmp, &rdev_list, entry)
1069 cxio_rdev_close(rdev);
1070 cxio_hal_destroy_rhdl_resource();
1071 }
1072
1073 static void flush_completed_wrs(struct t3_wq *wq, struct t3_cq *cq)
1074 {
1075 struct t3_swsq *sqp;
1076 __u32 ptr = wq->sq_rptr;
1077 int count = Q_COUNT(wq->sq_rptr, wq->sq_wptr);
1078
1079 sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
1080 while (count--)
1081 if (!sqp->signaled) {
1082 ptr++;
1083 sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
1084 } else if (sqp->complete) {
1085
1086 /*
1087 * Insert this completed cqe into the swcq.
1088 */
1089 PDBG("%s moving cqe into swcq sq idx %ld cq idx %ld\n",
1090 __func__, Q_PTR2IDX(ptr, wq->sq_size_log2),
1091 Q_PTR2IDX(cq->sw_wptr, cq->size_log2));
1092 sqp->cqe.header |= htonl(V_CQE_SWCQE(1));
1093 *(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2))
1094 = sqp->cqe;
1095 cq->sw_wptr++;
1096 sqp->signaled = 0;
1097 break;
1098 } else
1099 break;
1100 }
1101
1102 static void create_read_req_cqe(struct t3_wq *wq, struct t3_cqe *hw_cqe,
1103 struct t3_cqe *read_cqe)
1104 {
1105 read_cqe->u.scqe.wrid_hi = wq->oldest_read->sq_wptr;
1106 read_cqe->len = wq->oldest_read->read_len;
1107 read_cqe->header = htonl(V_CQE_QPID(CQE_QPID(*hw_cqe)) |
1108 V_CQE_SWCQE(SW_CQE(*hw_cqe)) |
1109 V_CQE_OPCODE(T3_READ_REQ) |
1110 V_CQE_TYPE(1));
1111 }
1112
1113 /*
1114 * Return a ptr to the next read wr in the SWSQ or NULL.
1115 */
1116 static void advance_oldest_read(struct t3_wq *wq)
1117 {
1118
1119 u32 rptr = wq->oldest_read - wq->sq + 1;
1120 u32 wptr = Q_PTR2IDX(wq->sq_wptr, wq->sq_size_log2);
1121
1122 while (Q_PTR2IDX(rptr, wq->sq_size_log2) != wptr) {
1123 wq->oldest_read = wq->sq + Q_PTR2IDX(rptr, wq->sq_size_log2);
1124
1125 if (wq->oldest_read->opcode == T3_READ_REQ)
1126 return;
1127 rptr++;
1128 }
1129 wq->oldest_read = NULL;
1130 }
1131
1132 /*
1133 * cxio_poll_cq
1134 *
1135 * Caller must:
1136 * check the validity of the first CQE,
1137 * supply the wq assicated with the qpid.
1138 *
1139 * credit: cq credit to return to sge.
1140 * cqe_flushed: 1 iff the CQE is flushed.
1141 * cqe: copy of the polled CQE.
1142 *
1143 * return value:
1144 * 0 CQE returned,
1145 * -1 CQE skipped, try again.
1146 */
1147 int cxio_poll_cq(struct t3_wq *wq, struct t3_cq *cq, struct t3_cqe *cqe,
1148 u8 *cqe_flushed, u64 *cookie, u32 *credit)
1149 {
1150 int ret = 0;
1151 struct t3_cqe *hw_cqe, read_cqe;
1152
1153 *cqe_flushed = 0;
1154 *credit = 0;
1155 hw_cqe = cxio_next_cqe(cq);
1156
1157 PDBG("%s CQE OOO %d qpid 0x%0x genbit %d type %d status 0x%0x"
1158 " opcode 0x%0x len 0x%0x wrid_hi_stag 0x%x wrid_low_msn 0x%x\n",
1159 __func__, CQE_OOO(*hw_cqe), CQE_QPID(*hw_cqe),
1160 CQE_GENBIT(*hw_cqe), CQE_TYPE(*hw_cqe), CQE_STATUS(*hw_cqe),
1161 CQE_OPCODE(*hw_cqe), CQE_LEN(*hw_cqe), CQE_WRID_HI(*hw_cqe),
1162 CQE_WRID_LOW(*hw_cqe));
1163
1164 /*
1165 * skip cqe's not affiliated with a QP.
1166 */
1167 if (wq == NULL) {
1168 ret = -1;
1169 goto skip_cqe;
1170 }
1171
1172 /*
1173 * Gotta tweak READ completions:
1174 * 1) the cqe doesn't contain the sq_wptr from the wr.
1175 * 2) opcode not reflected from the wr.
1176 * 3) read_len not reflected from the wr.
1177 * 4) cq_type is RQ_TYPE not SQ_TYPE.
1178 */
1179 if (RQ_TYPE(*hw_cqe) && (CQE_OPCODE(*hw_cqe) == T3_READ_RESP)) {
1180
1181 /*
1182 * If this is an unsolicited read response, then the read
1183 * was generated by the kernel driver as part of peer-2-peer
1184 * connection setup. So ignore the completion.
1185 */
1186 if (!wq->oldest_read) {
1187 if (CQE_STATUS(*hw_cqe))
1188 wq->error = 1;
1189 ret = -1;
1190 goto skip_cqe;
1191 }
1192
1193 /*
1194 * Don't write to the HWCQ, so create a new read req CQE
1195 * in local memory.
1196 */
1197 create_read_req_cqe(wq, hw_cqe, &read_cqe);
1198 hw_cqe = &read_cqe;
1199 advance_oldest_read(wq);
1200 }
1201
1202 /*
1203 * T3A: Discard TERMINATE CQEs.
1204 */
1205 if (CQE_OPCODE(*hw_cqe) == T3_TERMINATE) {
1206 ret = -1;
1207 wq->error = 1;
1208 goto skip_cqe;
1209 }
1210
1211 if (CQE_STATUS(*hw_cqe) || wq->error) {
1212 *cqe_flushed = wq->error;
1213 wq->error = 1;
1214
1215 /*
1216 * T3A inserts errors into the CQE. We cannot return
1217 * these as work completions.
1218 */
1219 /* incoming write failures */
1220 if ((CQE_OPCODE(*hw_cqe) == T3_RDMA_WRITE)
1221 && RQ_TYPE(*hw_cqe)) {
1222 ret = -1;
1223 goto skip_cqe;
1224 }
1225 /* incoming read request failures */
1226 if ((CQE_OPCODE(*hw_cqe) == T3_READ_RESP) && SQ_TYPE(*hw_cqe)) {
1227 ret = -1;
1228 goto skip_cqe;
1229 }
1230
1231 /* incoming SEND with no receive posted failures */
1232 if (CQE_SEND_OPCODE(*hw_cqe) && RQ_TYPE(*hw_cqe) &&
1233 Q_EMPTY(wq->rq_rptr, wq->rq_wptr)) {
1234 ret = -1;
1235 goto skip_cqe;
1236 }
1237 BUG_ON((*cqe_flushed == 0) && !SW_CQE(*hw_cqe));
1238 goto proc_cqe;
1239 }
1240
1241 /*
1242 * RECV completion.
1243 */
1244 if (RQ_TYPE(*hw_cqe)) {
1245
1246 /*
1247 * HW only validates 4 bits of MSN. So we must validate that
1248 * the MSN in the SEND is the next expected MSN. If its not,
1249 * then we complete this with TPT_ERR_MSN and mark the wq in
1250 * error.
1251 */
1252
1253 if (Q_EMPTY(wq->rq_rptr, wq->rq_wptr)) {
1254 wq->error = 1;
1255 ret = -1;
1256 goto skip_cqe;
1257 }
1258
1259 if (unlikely((CQE_WRID_MSN(*hw_cqe) != (wq->rq_rptr + 1)))) {
1260 wq->error = 1;
1261 hw_cqe->header |= htonl(V_CQE_STATUS(TPT_ERR_MSN));
1262 goto proc_cqe;
1263 }
1264 goto proc_cqe;
1265 }
1266
1267 /*
1268 * If we get here its a send completion.
1269 *
1270 * Handle out of order completion. These get stuffed
1271 * in the SW SQ. Then the SW SQ is walked to move any
1272 * now in-order completions into the SW CQ. This handles
1273 * 2 cases:
1274 * 1) reaping unsignaled WRs when the first subsequent
1275 * signaled WR is completed.
1276 * 2) out of order read completions.
1277 */
1278 if (!SW_CQE(*hw_cqe) && (CQE_WRID_SQ_WPTR(*hw_cqe) != wq->sq_rptr)) {
1279 struct t3_swsq *sqp;
1280
1281 PDBG("%s out of order completion going in swsq at idx %ld\n",
1282 __func__,
1283 Q_PTR2IDX(CQE_WRID_SQ_WPTR(*hw_cqe), wq->sq_size_log2));
1284 sqp = wq->sq +
1285 Q_PTR2IDX(CQE_WRID_SQ_WPTR(*hw_cqe), wq->sq_size_log2);
1286 sqp->cqe = *hw_cqe;
1287 sqp->complete = 1;
1288 ret = -1;
1289 goto flush_wq;
1290 }
1291
1292 proc_cqe:
1293 *cqe = *hw_cqe;
1294
1295 /*
1296 * Reap the associated WR(s) that are freed up with this
1297 * completion.
1298 */
1299 if (SQ_TYPE(*hw_cqe)) {
1300 wq->sq_rptr = CQE_WRID_SQ_WPTR(*hw_cqe);
1301 PDBG("%s completing sq idx %ld\n", __func__,
1302 Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2));
1303 *cookie = wq->sq[Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2)].wr_id;
1304 wq->sq_rptr++;
1305 } else {
1306 PDBG("%s completing rq idx %ld\n", __func__,
1307 Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2));
1308 *cookie = wq->rq[Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2)].wr_id;
1309 if (wq->rq[Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2)].pbl_addr)
1310 cxio_hal_pblpool_free(wq->rdev,
1311 wq->rq[Q_PTR2IDX(wq->rq_rptr,
1312 wq->rq_size_log2)].pbl_addr, T3_STAG0_PBL_SIZE);
1313 BUG_ON(Q_EMPTY(wq->rq_rptr, wq->rq_wptr));
1314 wq->rq_rptr++;
1315 }
1316
1317 flush_wq:
1318 /*
1319 * Flush any completed cqes that are now in-order.
1320 */
1321 flush_completed_wrs(wq, cq);
1322
1323 skip_cqe:
1324 if (SW_CQE(*hw_cqe)) {
1325 PDBG("%s cq %p cqid 0x%x skip sw cqe sw_rptr 0x%x\n",
1326 __func__, cq, cq->cqid, cq->sw_rptr);
1327 ++cq->sw_rptr;
1328 } else {
1329 PDBG("%s cq %p cqid 0x%x skip hw cqe rptr 0x%x\n",
1330 __func__, cq, cq->cqid, cq->rptr);
1331 ++cq->rptr;
1332
1333 /*
1334 * T3A: compute credits.
1335 */
1336 if (((cq->rptr - cq->wptr) > (1 << (cq->size_log2 - 1)))
1337 || ((cq->rptr - cq->wptr) >= 128)) {
1338 *credit = cq->rptr - cq->wptr;
1339 cq->wptr = cq->rptr;
1340 }
1341 }
1342 return ret;
1343 }