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34#include <linux/pci.h>
35#include <linux/poll.h>
36#include <linux/cdev.h>
37#include <linux/swap.h>
38#include <linux/export.h>
39#include <linux/vmalloc.h>
40#include <linux/slab.h>
41#include <linux/highmem.h>
42#include <linux/io.h>
43#include <linux/aio.h>
44#include <linux/jiffies.h>
45#include <linux/cpu.h>
46#include <asm/pgtable.h>
47
48#include "ipath_kernel.h"
49#include "ipath_common.h"
50#include "ipath_user_sdma.h"
51
52static int ipath_open(struct inode *, struct file *);
53static int ipath_close(struct inode *, struct file *);
54static ssize_t ipath_write(struct file *, const char __user *, size_t,
55 loff_t *);
56static ssize_t ipath_writev(struct kiocb *, const struct iovec *,
57 unsigned long , loff_t);
58static unsigned int ipath_poll(struct file *, struct poll_table_struct *);
59static int ipath_mmap(struct file *, struct vm_area_struct *);
60
61static const struct file_operations ipath_file_ops = {
62 .owner = THIS_MODULE,
63 .write = ipath_write,
64 .aio_write = ipath_writev,
65 .open = ipath_open,
66 .release = ipath_close,
67 .poll = ipath_poll,
68 .mmap = ipath_mmap,
69 .llseek = noop_llseek,
70};
71
72
73
74
75
76
77
78static u64 cvt_kvaddr(void *p)
79{
80 struct page *page;
81 u64 paddr = 0;
82
83 page = vmalloc_to_page(p);
84 if (page)
85 paddr = page_to_pfn(page) << PAGE_SHIFT;
86
87 return paddr;
88}
89
90static int ipath_get_base_info(struct file *fp,
91 void __user *ubase, size_t ubase_size)
92{
93 struct ipath_portdata *pd = port_fp(fp);
94 int ret = 0;
95 struct ipath_base_info *kinfo = NULL;
96 struct ipath_devdata *dd = pd->port_dd;
97 unsigned subport_cnt;
98 int shared, master;
99 size_t sz;
100
101 subport_cnt = pd->port_subport_cnt;
102 if (!subport_cnt) {
103 shared = 0;
104 master = 0;
105 subport_cnt = 1;
106 } else {
107 shared = 1;
108 master = !subport_fp(fp);
109 }
110
111 sz = sizeof(*kinfo);
112
113 if (!shared)
114 sz -= 7 * sizeof(u64);
115 if (ubase_size < sz) {
116 ipath_cdbg(PROC,
117 "Base size %zu, need %zu (version mismatch?)\n",
118 ubase_size, sz);
119 ret = -EINVAL;
120 goto bail;
121 }
122
123 kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL);
124 if (kinfo == NULL) {
125 ret = -ENOMEM;
126 goto bail;
127 }
128
129 ret = dd->ipath_f_get_base_info(pd, kinfo);
130 if (ret < 0)
131 goto bail;
132
133 kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt;
134 kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize;
135 kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt;
136 kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize;
137
138
139
140 kinfo->spi_rcv_egrbuftotlen =
141 pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
142 kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk;
143 kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen /
144 pd->port_rcvegrbuf_chunks;
145 kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt;
146 if (master)
147 kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt;
148
149
150
151
152 kinfo->spi_nports = dd->ipath_cfgports;
153
154 kinfo->spi_unit = dd->ipath_unit;
155
156 kinfo->spi_tid_maxsize = PAGE_SIZE;
157
158
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171
172
173 kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys;
174 kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys;
175 kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys;
176 kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys;
177 kinfo->spi_status = (u64) kinfo->spi_pioavailaddr +
178 (void *) dd->ipath_statusp -
179 (void *) dd->ipath_pioavailregs_dma;
180 if (!shared) {
181 kinfo->spi_piocnt = pd->port_piocnt;
182 kinfo->spi_piobufbase = (u64) pd->port_piobufs;
183 kinfo->__spi_uregbase = (u64) dd->ipath_uregbase +
184 dd->ipath_ureg_align * pd->port_port;
185 } else if (master) {
186 kinfo->spi_piocnt = (pd->port_piocnt / subport_cnt) +
187 (pd->port_piocnt % subport_cnt);
188
189 kinfo->spi_piobufbase = (u64) pd->port_piobufs +
190 dd->ipath_palign *
191 (pd->port_piocnt - kinfo->spi_piocnt);
192 } else {
193 unsigned slave = subport_fp(fp) - 1;
194
195 kinfo->spi_piocnt = pd->port_piocnt / subport_cnt;
196 kinfo->spi_piobufbase = (u64) pd->port_piobufs +
197 dd->ipath_palign * kinfo->spi_piocnt * slave;
198 }
199
200 if (shared) {
201 kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase +
202 dd->ipath_ureg_align * pd->port_port;
203 kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs;
204 kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base;
205 kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr;
206
207 kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase +
208 PAGE_SIZE * subport_fp(fp));
209
210 kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base +
211 pd->port_rcvhdrq_size * subport_fp(fp));
212 kinfo->spi_rcvhdr_tailaddr = 0;
213 kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf +
214 pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size *
215 subport_fp(fp));
216
217 kinfo->spi_subport_uregbase =
218 cvt_kvaddr(pd->subport_uregbase);
219 kinfo->spi_subport_rcvegrbuf =
220 cvt_kvaddr(pd->subport_rcvegrbuf);
221 kinfo->spi_subport_rcvhdr_base =
222 cvt_kvaddr(pd->subport_rcvhdr_base);
223 ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n",
224 kinfo->spi_port, kinfo->spi_runtime_flags,
225 (unsigned long long) kinfo->spi_subport_uregbase,
226 (unsigned long long) kinfo->spi_subport_rcvegrbuf,
227 (unsigned long long) kinfo->spi_subport_rcvhdr_base);
228 }
229
230
231
232
233
234
235 kinfo->spi_pioindex = (kinfo->spi_piobufbase -
236 (dd->ipath_piobufbase & 0xffffffff)) / dd->ipath_palign;
237 kinfo->spi_pioalign = dd->ipath_palign;
238
239 kinfo->spi_qpair = IPATH_KD_QP;
240
241
242
243
244
245 kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32);
246 kinfo->spi_mtu = dd->ipath_ibmaxlen;
247 kinfo->spi_port = pd->port_port;
248 kinfo->spi_subport = subport_fp(fp);
249 kinfo->spi_sw_version = IPATH_KERN_SWVERSION;
250 kinfo->spi_hw_version = dd->ipath_revision;
251
252 if (master) {
253 kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER;
254 }
255
256 sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo);
257 if (copy_to_user(ubase, kinfo, sz))
258 ret = -EFAULT;
259
260bail:
261 kfree(kinfo);
262 return ret;
263}
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290
291static int ipath_tid_update(struct ipath_portdata *pd, struct file *fp,
292 const struct ipath_tid_info *ti)
293{
294 int ret = 0, ntids;
295 u32 tid, porttid, cnt, i, tidcnt, tidoff;
296 u16 *tidlist;
297 struct ipath_devdata *dd = pd->port_dd;
298 u64 physaddr;
299 unsigned long vaddr;
300 u64 __iomem *tidbase;
301 unsigned long tidmap[8];
302 struct page **pagep = NULL;
303 unsigned subport = subport_fp(fp);
304
305 if (!dd->ipath_pageshadow) {
306 ret = -ENOMEM;
307 goto done;
308 }
309
310 cnt = ti->tidcnt;
311 if (!cnt) {
312 ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n",
313 (unsigned long long) ti->tidlist);
314
315
316
317 ret = -EFAULT;
318 goto done;
319 }
320 porttid = pd->port_port * dd->ipath_rcvtidcnt;
321 if (!pd->port_subport_cnt) {
322 tidcnt = dd->ipath_rcvtidcnt;
323 tid = pd->port_tidcursor;
324 tidoff = 0;
325 } else if (!subport) {
326 tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) +
327 (dd->ipath_rcvtidcnt % pd->port_subport_cnt);
328 tidoff = dd->ipath_rcvtidcnt - tidcnt;
329 porttid += tidoff;
330 tid = tidcursor_fp(fp);
331 } else {
332 tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt;
333 tidoff = tidcnt * (subport - 1);
334 porttid += tidoff;
335 tid = tidcursor_fp(fp);
336 }
337 if (cnt > tidcnt) {
338
339 dev_info(&dd->pcidev->dev, "Process tried to allocate %u "
340 "TIDs, only trying max (%u)\n", cnt, tidcnt);
341 cnt = tidcnt;
342 }
343 pagep = &((struct page **) pd->port_tid_pg_list)[tidoff];
344 tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff];
345
346 memset(tidmap, 0, sizeof(tidmap));
347
348 ntids = tidcnt;
349 tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) +
350 dd->ipath_rcvtidbase +
351 porttid * sizeof(*tidbase));
352
353 ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n",
354 pd->port_port, cnt, tid, tidbase);
355
356
357 vaddr = ti->tidvaddr;
358 if (!access_ok(VERIFY_WRITE, (void __user *) vaddr,
359 cnt * PAGE_SIZE)) {
360 ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n",
361 (void *)vaddr, cnt);
362 ret = -EFAULT;
363 goto done;
364 }
365 ret = ipath_get_user_pages(vaddr, cnt, pagep);
366 if (ret) {
367 if (ret == -EBUSY) {
368 ipath_dbg("Failed to lock addr %p, %u pages "
369 "(already locked)\n",
370 (void *) vaddr, cnt);
371
372
373
374
375
376
377 ret = 0;
378 } else {
379 dev_info(&dd->pcidev->dev,
380 "Failed to lock addr %p, %u pages: "
381 "errno %d\n", (void *) vaddr, cnt, -ret);
382 goto done;
383 }
384 }
385 for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) {
386 for (; ntids--; tid++) {
387 if (tid == tidcnt)
388 tid = 0;
389 if (!dd->ipath_pageshadow[porttid + tid])
390 break;
391 }
392 if (ntids < 0) {
393
394
395
396
397
398 ipath_dbg("Not enough free TIDs for %u pages "
399 "(index %d), failing\n", cnt, i);
400 i--;
401 ret = -ENOMEM;
402 break;
403 }
404 tidlist[i] = tid + tidoff;
405 ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, "
406 "vaddr %lx\n", i, tid + tidoff, vaddr);
407
408 dd->ipath_pageshadow[porttid + tid] = pagep[i];
409 dd->ipath_physshadow[porttid + tid] = ipath_map_page(
410 dd->pcidev, pagep[i], 0, PAGE_SIZE,
411 PCI_DMA_FROMDEVICE);
412
413
414
415 __set_bit(tid, tidmap);
416 physaddr = dd->ipath_physshadow[porttid + tid];
417 ipath_stats.sps_pagelocks++;
418 ipath_cdbg(VERBOSE,
419 "TID %u, vaddr %lx, physaddr %llx pgp %p\n",
420 tid, vaddr, (unsigned long long) physaddr,
421 pagep[i]);
422 dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED,
423 physaddr);
424
425
426
427
428 tid++;
429 }
430
431 if (ret) {
432 u32 limit;
433 cleanup:
434
435 ipath_dbg("After failure (ret=%d), undo %d of %d entries\n",
436 -ret, i, cnt);
437
438 limit = sizeof(tidmap) * BITS_PER_BYTE;
439 if (limit > tidcnt)
440
441 limit = tidcnt;
442 tid = find_first_bit((const unsigned long *)tidmap, limit);
443 for (; tid < limit; tid++) {
444 if (!test_bit(tid, tidmap))
445 continue;
446 if (dd->ipath_pageshadow[porttid + tid]) {
447 ipath_cdbg(VERBOSE, "Freeing TID %u\n",
448 tid);
449 dd->ipath_f_put_tid(dd, &tidbase[tid],
450 RCVHQ_RCV_TYPE_EXPECTED,
451 dd->ipath_tidinvalid);
452 pci_unmap_page(dd->pcidev,
453 dd->ipath_physshadow[porttid + tid],
454 PAGE_SIZE, PCI_DMA_FROMDEVICE);
455 dd->ipath_pageshadow[porttid + tid] = NULL;
456 ipath_stats.sps_pageunlocks++;
457 }
458 }
459 ipath_release_user_pages(pagep, cnt);
460 } else {
461
462
463
464
465
466 if (copy_to_user((void __user *)
467 (unsigned long) ti->tidlist,
468 tidlist, cnt * sizeof(*tidlist))) {
469 ret = -EFAULT;
470 goto cleanup;
471 }
472 if (copy_to_user((void __user *) (unsigned long) ti->tidmap,
473 tidmap, sizeof tidmap)) {
474 ret = -EFAULT;
475 goto cleanup;
476 }
477 if (tid == tidcnt)
478 tid = 0;
479 if (!pd->port_subport_cnt)
480 pd->port_tidcursor = tid;
481 else
482 tidcursor_fp(fp) = tid;
483 }
484
485done:
486 if (ret)
487 ipath_dbg("Failed to map %u TID pages, failing with %d\n",
488 ti->tidcnt, -ret);
489 return ret;
490}
491
492
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508
509static int ipath_tid_free(struct ipath_portdata *pd, unsigned subport,
510 const struct ipath_tid_info *ti)
511{
512 int ret = 0;
513 u32 tid, porttid, cnt, limit, tidcnt;
514 struct ipath_devdata *dd = pd->port_dd;
515 u64 __iomem *tidbase;
516 unsigned long tidmap[8];
517
518 if (!dd->ipath_pageshadow) {
519 ret = -ENOMEM;
520 goto done;
521 }
522
523 if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap,
524 sizeof tidmap)) {
525 ret = -EFAULT;
526 goto done;
527 }
528
529 porttid = pd->port_port * dd->ipath_rcvtidcnt;
530 if (!pd->port_subport_cnt)
531 tidcnt = dd->ipath_rcvtidcnt;
532 else if (!subport) {
533 tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) +
534 (dd->ipath_rcvtidcnt % pd->port_subport_cnt);
535 porttid += dd->ipath_rcvtidcnt - tidcnt;
536 } else {
537 tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt;
538 porttid += tidcnt * (subport - 1);
539 }
540 tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
541 dd->ipath_rcvtidbase +
542 porttid * sizeof(*tidbase));
543
544 limit = sizeof(tidmap) * BITS_PER_BYTE;
545 if (limit > tidcnt)
546
547 limit = tidcnt;
548 tid = find_first_bit(tidmap, limit);
549 ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) "
550 "set is %d, porttid %u\n", pd->port_port, ti->tidcnt,
551 limit, tid, porttid);
552 for (cnt = 0; tid < limit; tid++) {
553
554
555
556
557
558
559
560 if (!test_bit(tid, tidmap))
561 continue;
562 cnt++;
563 if (dd->ipath_pageshadow[porttid + tid]) {
564 struct page *p;
565 p = dd->ipath_pageshadow[porttid + tid];
566 dd->ipath_pageshadow[porttid + tid] = NULL;
567 ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n",
568 pid_nr(pd->port_pid), tid);
569 dd->ipath_f_put_tid(dd, &tidbase[tid],
570 RCVHQ_RCV_TYPE_EXPECTED,
571 dd->ipath_tidinvalid);
572 pci_unmap_page(dd->pcidev,
573 dd->ipath_physshadow[porttid + tid],
574 PAGE_SIZE, PCI_DMA_FROMDEVICE);
575 ipath_release_user_pages(&p, 1);
576 ipath_stats.sps_pageunlocks++;
577 } else
578 ipath_dbg("Unused tid %u, ignoring\n", tid);
579 }
580 if (cnt != ti->tidcnt)
581 ipath_dbg("passed in tidcnt %d, only %d bits set in map\n",
582 ti->tidcnt, cnt);
583done:
584 if (ret)
585 ipath_dbg("Failed to unmap %u TID pages, failing with %d\n",
586 ti->tidcnt, -ret);
587 return ret;
588}
589
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603
604
605
606static int ipath_set_part_key(struct ipath_portdata *pd, u16 key)
607{
608 struct ipath_devdata *dd = pd->port_dd;
609 int i, any = 0, pidx = -1;
610 u16 lkey = key & 0x7FFF;
611 int ret;
612
613 if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) {
614
615 ret = 0;
616 goto bail;
617 }
618
619 ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys "
620 "%hx:%x %hx:%x %hx:%x %hx:%x\n",
621 pd->port_port, key, dd->ipath_pkeys[0],
622 atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1],
623 atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2],
624 atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3],
625 atomic_read(&dd->ipath_pkeyrefs[3]));
626
627 if (!lkey) {
628 ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n",
629 pd->port_port);
630 ret = -EINVAL;
631 goto bail;
632 }
633
634
635
636
637
638
639
640 key |= 0x8000;
641
642 for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
643 if (!pd->port_pkeys[i] && pidx == -1)
644 pidx = i;
645 if (pd->port_pkeys[i] == key) {
646 ipath_cdbg(VERBOSE, "p%u tries to set same pkey "
647 "(%x) more than once\n",
648 pd->port_port, key);
649 ret = -EEXIST;
650 goto bail;
651 }
652 }
653 if (pidx == -1) {
654 ipath_dbg("All pkeys for port %u already in use, "
655 "can't set %x\n", pd->port_port, key);
656 ret = -EBUSY;
657 goto bail;
658 }
659 for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
660 if (!dd->ipath_pkeys[i]) {
661 any++;
662 continue;
663 }
664 if (dd->ipath_pkeys[i] == key) {
665 atomic_t *pkrefs = &dd->ipath_pkeyrefs[i];
666
667 if (atomic_inc_return(pkrefs) > 1) {
668 pd->port_pkeys[pidx] = key;
669 ipath_cdbg(VERBOSE, "p%u set key %x "
670 "matches #%d, count now %d\n",
671 pd->port_port, key, i,
672 atomic_read(pkrefs));
673 ret = 0;
674 goto bail;
675 } else {
676
677
678
679 atomic_dec(pkrefs);
680 ipath_cdbg(VERBOSE, "Lost race, count was "
681 "0, after dec, it's %d\n",
682 atomic_read(pkrefs));
683 any++;
684 }
685 }
686 if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
687
688
689
690
691
692 ret = -EEXIST;
693 goto bail;
694 }
695 }
696 if (!any) {
697 ipath_dbg("port %u, all pkeys already in use, "
698 "can't set %x\n", pd->port_port, key);
699 ret = -EBUSY;
700 goto bail;
701 }
702 for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
703 if (!dd->ipath_pkeys[i] &&
704 atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
705 u64 pkey;
706
707
708 ipath_stats.sps_pkeys[i] = lkey;
709 pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key;
710 pkey =
711 (u64) dd->ipath_pkeys[0] |
712 ((u64) dd->ipath_pkeys[1] << 16) |
713 ((u64) dd->ipath_pkeys[2] << 32) |
714 ((u64) dd->ipath_pkeys[3] << 48);
715 ipath_cdbg(PROC, "p%u set key %x in #%d, "
716 "portidx %d, new pkey reg %llx\n",
717 pd->port_port, key, i, pidx,
718 (unsigned long long) pkey);
719 ipath_write_kreg(
720 dd, dd->ipath_kregs->kr_partitionkey, pkey);
721
722 ret = 0;
723 goto bail;
724 }
725 }
726 ipath_dbg("port %u, all pkeys already in use 2nd pass, "
727 "can't set %x\n", pd->port_port, key);
728 ret = -EBUSY;
729
730bail:
731 return ret;
732}
733
734
735
736
737
738
739
740
741
742
743
744static int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport,
745 int start_stop)
746{
747 struct ipath_devdata *dd = pd->port_dd;
748
749 ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n",
750 start_stop ? "en" : "dis", dd->ipath_unit,
751 pd->port_port, subport);
752 if (subport)
753 goto bail;
754
755 if (start_stop) {
756
757
758
759
760
761
762
763
764
765
766
767
768 if (pd->port_rcvhdrtail_kvaddr)
769 ipath_clear_rcvhdrtail(pd);
770 set_bit(dd->ipath_r_portenable_shift + pd->port_port,
771 &dd->ipath_rcvctrl);
772 } else
773 clear_bit(dd->ipath_r_portenable_shift + pd->port_port,
774 &dd->ipath_rcvctrl);
775 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
776 dd->ipath_rcvctrl);
777
778 ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
779 if (start_stop) {
780
781
782
783
784
785
786
787 ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
788 }
789
790bail:
791 return 0;
792}
793
794static void ipath_clean_part_key(struct ipath_portdata *pd,
795 struct ipath_devdata *dd)
796{
797 int i, j, pchanged = 0;
798 u64 oldpkey;
799
800
801 oldpkey = (u64) dd->ipath_pkeys[0] |
802 ((u64) dd->ipath_pkeys[1] << 16) |
803 ((u64) dd->ipath_pkeys[2] << 32) |
804 ((u64) dd->ipath_pkeys[3] << 48);
805
806 for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
807 if (!pd->port_pkeys[i])
808 continue;
809 ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i,
810 pd->port_pkeys[i]);
811 for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) {
812
813 if ((dd->ipath_pkeys[j] & 0x7fff) !=
814 (pd->port_pkeys[i] & 0x7fff))
815 continue;
816 if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) {
817 ipath_cdbg(VERBOSE, "p%u clear key "
818 "%x matches #%d\n",
819 pd->port_port,
820 pd->port_pkeys[i], j);
821 ipath_stats.sps_pkeys[j] =
822 dd->ipath_pkeys[j] = 0;
823 pchanged++;
824 }
825 else ipath_cdbg(
826 VERBOSE, "p%u key %x matches #%d, "
827 "but ref still %d\n", pd->port_port,
828 pd->port_pkeys[i], j,
829 atomic_read(&dd->ipath_pkeyrefs[j]));
830 break;
831 }
832 pd->port_pkeys[i] = 0;
833 }
834 if (pchanged) {
835 u64 pkey = (u64) dd->ipath_pkeys[0] |
836 ((u64) dd->ipath_pkeys[1] << 16) |
837 ((u64) dd->ipath_pkeys[2] << 32) |
838 ((u64) dd->ipath_pkeys[3] << 48);
839 ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, "
840 "new pkey reg %llx\n", pd->port_port,
841 (unsigned long long) oldpkey,
842 (unsigned long long) pkey);
843 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
844 pkey);
845 }
846}
847
848
849
850
851
852
853
854static void init_user_egr_sizes(struct ipath_portdata *pd)
855{
856 struct ipath_devdata *dd = pd->port_dd;
857 unsigned egrperchunk, egrcnt, size;
858
859
860
861
862
863
864
865
866
867
868
869
870 size = 0x8000;
871 egrperchunk = size / dd->ipath_rcvegrbufsize;
872 egrcnt = dd->ipath_rcvegrcnt;
873 pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk;
874 pd->port_rcvegrbufs_perchunk = egrperchunk;
875 pd->port_rcvegrbuf_size = size;
876}
877
878
879
880
881
882
883
884
885
886
887
888
889
890static int ipath_create_user_egr(struct ipath_portdata *pd)
891{
892 struct ipath_devdata *dd = pd->port_dd;
893 unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff;
894 size_t size;
895 int ret;
896 gfp_t gfp_flags;
897
898
899
900
901
902
903
904 gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP;
905
906 egrcnt = dd->ipath_rcvegrcnt;
907
908 egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt;
909 egrsize = dd->ipath_rcvegrbufsize;
910 ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid "
911 "offset %x, egrsize %u\n", egrcnt, egroff, egrsize);
912
913 chunk = pd->port_rcvegrbuf_chunks;
914 egrperchunk = pd->port_rcvegrbufs_perchunk;
915 size = pd->port_rcvegrbuf_size;
916 pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]),
917 GFP_KERNEL);
918 if (!pd->port_rcvegrbuf) {
919 ret = -ENOMEM;
920 goto bail;
921 }
922 pd->port_rcvegrbuf_phys =
923 kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]),
924 GFP_KERNEL);
925 if (!pd->port_rcvegrbuf_phys) {
926 ret = -ENOMEM;
927 goto bail_rcvegrbuf;
928 }
929 for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) {
930
931 pd->port_rcvegrbuf[e] = dma_alloc_coherent(
932 &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e],
933 gfp_flags);
934
935 if (!pd->port_rcvegrbuf[e]) {
936 ret = -ENOMEM;
937 goto bail_rcvegrbuf_phys;
938 }
939 }
940
941 pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0];
942
943 for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) {
944 dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk];
945 unsigned i;
946
947 for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
948 dd->ipath_f_put_tid(dd, e + egroff +
949 (u64 __iomem *)
950 ((char __iomem *)
951 dd->ipath_kregbase +
952 dd->ipath_rcvegrbase),
953 RCVHQ_RCV_TYPE_EAGER, pa);
954 pa += egrsize;
955 }
956 cond_resched();
957 }
958
959 ret = 0;
960 goto bail;
961
962bail_rcvegrbuf_phys:
963 for (e = 0; e < pd->port_rcvegrbuf_chunks &&
964 pd->port_rcvegrbuf[e]; e++) {
965 dma_free_coherent(&dd->pcidev->dev, size,
966 pd->port_rcvegrbuf[e],
967 pd->port_rcvegrbuf_phys[e]);
968
969 }
970 kfree(pd->port_rcvegrbuf_phys);
971 pd->port_rcvegrbuf_phys = NULL;
972bail_rcvegrbuf:
973 kfree(pd->port_rcvegrbuf);
974 pd->port_rcvegrbuf = NULL;
975bail:
976 return ret;
977}
978
979
980
981static int ipath_mmap_mem(struct vm_area_struct *vma,
982 struct ipath_portdata *pd, unsigned len, int write_ok,
983 void *kvaddr, char *what)
984{
985 struct ipath_devdata *dd = pd->port_dd;
986 unsigned long pfn;
987 int ret;
988
989 if ((vma->vm_end - vma->vm_start) > len) {
990 dev_info(&dd->pcidev->dev,
991 "FAIL on %s: len %lx > %x\n", what,
992 vma->vm_end - vma->vm_start, len);
993 ret = -EFAULT;
994 goto bail;
995 }
996
997 if (!write_ok) {
998 if (vma->vm_flags & VM_WRITE) {
999 dev_info(&dd->pcidev->dev,
1000 "%s must be mapped readonly\n", what);
1001 ret = -EPERM;
1002 goto bail;
1003 }
1004
1005
1006 vma->vm_flags &= ~VM_MAYWRITE;
1007 }
1008
1009 pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT;
1010 ret = remap_pfn_range(vma, vma->vm_start, pfn,
1011 len, vma->vm_page_prot);
1012 if (ret)
1013 dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x "
1014 "bytes r%c failed: %d\n", what, pd->port_port,
1015 pfn, len, write_ok?'w':'o', ret);
1016 else
1017 ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes "
1018 "r%c\n", what, pd->port_port, pfn, len,
1019 write_ok?'w':'o');
1020bail:
1021 return ret;
1022}
1023
1024static int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd,
1025 u64 ureg)
1026{
1027 unsigned long phys;
1028 int ret;
1029
1030
1031
1032
1033
1034
1035 if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) {
1036 dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen "
1037 "%lx > PAGE\n", vma->vm_end - vma->vm_start);
1038 ret = -EFAULT;
1039 } else {
1040 phys = dd->ipath_physaddr + ureg;
1041 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1042
1043 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
1044 ret = io_remap_pfn_range(vma, vma->vm_start,
1045 phys >> PAGE_SHIFT,
1046 vma->vm_end - vma->vm_start,
1047 vma->vm_page_prot);
1048 }
1049 return ret;
1050}
1051
1052static int mmap_piobufs(struct vm_area_struct *vma,
1053 struct ipath_devdata *dd,
1054 struct ipath_portdata *pd,
1055 unsigned piobufs, unsigned piocnt)
1056{
1057 unsigned long phys;
1058 int ret;
1059
1060
1061
1062
1063
1064
1065
1066 if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) {
1067 dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: "
1068 "reqlen %lx > PAGE\n",
1069 vma->vm_end - vma->vm_start);
1070 ret = -EINVAL;
1071 goto bail;
1072 }
1073
1074 phys = dd->ipath_physaddr + piobufs;
1075
1076#if defined(__powerpc__)
1077
1078 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1079 pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU;
1080 pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED;
1081#endif
1082
1083
1084
1085
1086
1087 vma->vm_flags &= ~VM_MAYREAD;
1088 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
1089
1090 ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT,
1091 vma->vm_end - vma->vm_start,
1092 vma->vm_page_prot);
1093bail:
1094 return ret;
1095}
1096
1097static int mmap_rcvegrbufs(struct vm_area_struct *vma,
1098 struct ipath_portdata *pd)
1099{
1100 struct ipath_devdata *dd = pd->port_dd;
1101 unsigned long start, size;
1102 size_t total_size, i;
1103 unsigned long pfn;
1104 int ret;
1105
1106 size = pd->port_rcvegrbuf_size;
1107 total_size = pd->port_rcvegrbuf_chunks * size;
1108 if ((vma->vm_end - vma->vm_start) > total_size) {
1109 dev_info(&dd->pcidev->dev, "FAIL on egr bufs: "
1110 "reqlen %lx > actual %lx\n",
1111 vma->vm_end - vma->vm_start,
1112 (unsigned long) total_size);
1113 ret = -EINVAL;
1114 goto bail;
1115 }
1116
1117 if (vma->vm_flags & VM_WRITE) {
1118 dev_info(&dd->pcidev->dev, "Can't map eager buffers as "
1119 "writable (flags=%lx)\n", vma->vm_flags);
1120 ret = -EPERM;
1121 goto bail;
1122 }
1123
1124 vma->vm_flags &= ~VM_MAYWRITE;
1125
1126 start = vma->vm_start;
1127
1128 for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) {
1129 pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT;
1130 ret = remap_pfn_range(vma, start, pfn, size,
1131 vma->vm_page_prot);
1132 if (ret < 0)
1133 goto bail;
1134 }
1135 ret = 0;
1136
1137bail:
1138 return ret;
1139}
1140
1141
1142
1143
1144static int ipath_file_vma_fault(struct vm_area_struct *vma,
1145 struct vm_fault *vmf)
1146{
1147 struct page *page;
1148
1149 page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT));
1150 if (!page)
1151 return VM_FAULT_SIGBUS;
1152 get_page(page);
1153 vmf->page = page;
1154
1155 return 0;
1156}
1157
1158static const struct vm_operations_struct ipath_file_vm_ops = {
1159 .fault = ipath_file_vma_fault,
1160};
1161
1162static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,
1163 struct ipath_portdata *pd, unsigned subport)
1164{
1165 unsigned long len;
1166 struct ipath_devdata *dd;
1167 void *addr;
1168 size_t size;
1169 int ret = 0;
1170
1171
1172 if (!pd->port_subport_cnt)
1173 goto bail;
1174
1175 dd = pd->port_dd;
1176 size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
1177
1178
1179
1180
1181
1182
1183 if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) {
1184 addr = pd->subport_uregbase;
1185 size = PAGE_SIZE * pd->port_subport_cnt;
1186 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) {
1187 addr = pd->subport_rcvhdr_base;
1188 size = pd->port_rcvhdrq_size * pd->port_subport_cnt;
1189 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) {
1190 addr = pd->subport_rcvegrbuf;
1191 size *= pd->port_subport_cnt;
1192 } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase +
1193 PAGE_SIZE * subport)) {
1194 addr = pd->subport_uregbase + PAGE_SIZE * subport;
1195 size = PAGE_SIZE;
1196 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base +
1197 pd->port_rcvhdrq_size * subport)) {
1198 addr = pd->subport_rcvhdr_base +
1199 pd->port_rcvhdrq_size * subport;
1200 size = pd->port_rcvhdrq_size;
1201 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf +
1202 size * subport)) {
1203 addr = pd->subport_rcvegrbuf + size * subport;
1204
1205 if (vma->vm_flags & VM_WRITE) {
1206 dev_info(&dd->pcidev->dev,
1207 "Can't map eager buffers as "
1208 "writable (flags=%lx)\n", vma->vm_flags);
1209 ret = -EPERM;
1210 goto bail;
1211 }
1212
1213
1214
1215
1216 vma->vm_flags &= ~VM_MAYWRITE;
1217 } else {
1218 goto bail;
1219 }
1220 len = vma->vm_end - vma->vm_start;
1221 if (len > size) {
1222 ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size);
1223 ret = -EINVAL;
1224 goto bail;
1225 }
1226
1227 vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT;
1228 vma->vm_ops = &ipath_file_vm_ops;
1229 vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
1230 ret = 1;
1231
1232bail:
1233 return ret;
1234}
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246static int ipath_mmap(struct file *fp, struct vm_area_struct *vma)
1247{
1248 struct ipath_portdata *pd;
1249 struct ipath_devdata *dd;
1250 u64 pgaddr, ureg;
1251 unsigned piobufs, piocnt;
1252 int ret;
1253
1254 pd = port_fp(fp);
1255 if (!pd) {
1256 ret = -EINVAL;
1257 goto bail;
1258 }
1259 dd = pd->port_dd;
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269 pgaddr = vma->vm_pgoff << PAGE_SHIFT;
1270
1271
1272
1273
1274
1275 if (!pgaddr) {
1276 ret = -EINVAL;
1277 goto bail;
1278 }
1279
1280 ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n",
1281 (unsigned long long) pgaddr, vma->vm_start,
1282 vma->vm_end - vma->vm_start, dd->ipath_unit,
1283 pd->port_port, subport_fp(fp));
1284
1285
1286
1287
1288
1289
1290 ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp));
1291 if (ret) {
1292 if (ret > 0)
1293 ret = 0;
1294 goto bail;
1295 }
1296
1297 ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port;
1298 if (!pd->port_subport_cnt) {
1299
1300 piocnt = pd->port_piocnt;
1301 piobufs = pd->port_piobufs;
1302 } else if (!subport_fp(fp)) {
1303
1304 piocnt = (pd->port_piocnt / pd->port_subport_cnt) +
1305 (pd->port_piocnt % pd->port_subport_cnt);
1306 piobufs = pd->port_piobufs +
1307 dd->ipath_palign * (pd->port_piocnt - piocnt);
1308 } else {
1309 unsigned slave = subport_fp(fp) - 1;
1310
1311
1312 piocnt = pd->port_piocnt / pd->port_subport_cnt;
1313 piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave;
1314 }
1315
1316 if (pgaddr == ureg)
1317 ret = mmap_ureg(vma, dd, ureg);
1318 else if (pgaddr == piobufs)
1319 ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt);
1320 else if (pgaddr == dd->ipath_pioavailregs_phys)
1321
1322 ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0,
1323 (void *) dd->ipath_pioavailregs_dma,
1324 "pioavail registers");
1325 else if (pgaddr == pd->port_rcvegr_phys)
1326 ret = mmap_rcvegrbufs(vma, pd);
1327 else if (pgaddr == (u64) pd->port_rcvhdrq_phys)
1328
1329
1330
1331
1332
1333 ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1,
1334 pd->port_rcvhdrq,
1335 "rcvhdrq");
1336 else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys)
1337
1338 ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0,
1339 pd->port_rcvhdrtail_kvaddr,
1340 "rcvhdrq tail");
1341 else
1342 ret = -EINVAL;
1343
1344 vma->vm_private_data = NULL;
1345
1346 if (ret < 0)
1347 dev_info(&dd->pcidev->dev,
1348 "Failure %d on off %llx len %lx\n",
1349 -ret, (unsigned long long)pgaddr,
1350 vma->vm_end - vma->vm_start);
1351bail:
1352 return ret;
1353}
1354
1355static unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd)
1356{
1357 unsigned pollflag = 0;
1358
1359 if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) &&
1360 pd->port_hdrqfull != pd->port_hdrqfull_poll) {
1361 pollflag |= POLLIN | POLLRDNORM;
1362 pd->port_hdrqfull_poll = pd->port_hdrqfull;
1363 }
1364
1365 return pollflag;
1366}
1367
1368static unsigned int ipath_poll_urgent(struct ipath_portdata *pd,
1369 struct file *fp,
1370 struct poll_table_struct *pt)
1371{
1372 unsigned pollflag = 0;
1373 struct ipath_devdata *dd;
1374
1375 dd = pd->port_dd;
1376
1377
1378 rmb();
1379 pollflag = ipath_poll_hdrqfull(pd);
1380
1381 if (pd->port_urgent != pd->port_urgent_poll) {
1382 pollflag |= POLLIN | POLLRDNORM;
1383 pd->port_urgent_poll = pd->port_urgent;
1384 }
1385
1386 if (!pollflag) {
1387
1388 set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag);
1389
1390 wmb();
1391 poll_wait(fp, &pd->port_wait, pt);
1392 }
1393
1394 return pollflag;
1395}
1396
1397static unsigned int ipath_poll_next(struct ipath_portdata *pd,
1398 struct file *fp,
1399 struct poll_table_struct *pt)
1400{
1401 u32 head;
1402 u32 tail;
1403 unsigned pollflag = 0;
1404 struct ipath_devdata *dd;
1405
1406 dd = pd->port_dd;
1407
1408
1409 rmb();
1410 pollflag = ipath_poll_hdrqfull(pd);
1411
1412 head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port);
1413 if (pd->port_rcvhdrtail_kvaddr)
1414 tail = ipath_get_rcvhdrtail(pd);
1415 else
1416 tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
1417
1418 if (head != tail)
1419 pollflag |= POLLIN | POLLRDNORM;
1420 else {
1421
1422 set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag);
1423
1424 wmb();
1425
1426 set_bit(pd->port_port + dd->ipath_r_intravail_shift,
1427 &dd->ipath_rcvctrl);
1428
1429 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1430 dd->ipath_rcvctrl);
1431
1432 if (dd->ipath_rhdrhead_intr_off)
1433 ipath_write_ureg(dd, ur_rcvhdrhead,
1434 dd->ipath_rhdrhead_intr_off | head,
1435 pd->port_port);
1436
1437 poll_wait(fp, &pd->port_wait, pt);
1438 }
1439
1440 return pollflag;
1441}
1442
1443static unsigned int ipath_poll(struct file *fp,
1444 struct poll_table_struct *pt)
1445{
1446 struct ipath_portdata *pd;
1447 unsigned pollflag;
1448
1449 pd = port_fp(fp);
1450 if (!pd)
1451 pollflag = 0;
1452 else if (pd->poll_type & IPATH_POLL_TYPE_URGENT)
1453 pollflag = ipath_poll_urgent(pd, fp, pt);
1454 else
1455 pollflag = ipath_poll_next(pd, fp, pt);
1456
1457 return pollflag;
1458}
1459
1460static int ipath_supports_subports(int user_swmajor, int user_swminor)
1461{
1462
1463 return (user_swmajor > 1) || (user_swminor >= 3);
1464}
1465
1466static int ipath_compatible_subports(int user_swmajor, int user_swminor)
1467{
1468
1469 if (IPATH_USER_SWMAJOR != user_swmajor) {
1470
1471 return 0;
1472 }
1473 if (IPATH_USER_SWMAJOR == 1) {
1474 switch (IPATH_USER_SWMINOR) {
1475 case 0:
1476 case 1:
1477 case 2:
1478
1479 return 0;
1480 case 3:
1481
1482 return user_swminor == 3;
1483 default:
1484
1485 return user_swminor >= 4;
1486 }
1487 }
1488
1489 return 0;
1490}
1491
1492static int init_subports(struct ipath_devdata *dd,
1493 struct ipath_portdata *pd,
1494 const struct ipath_user_info *uinfo)
1495{
1496 int ret = 0;
1497 unsigned num_subports;
1498 size_t size;
1499
1500
1501
1502
1503
1504 if (uinfo->spu_subport_cnt <= 0)
1505 goto bail;
1506
1507
1508 if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) &&
1509 !ipath_compatible_subports(IPATH_USER_SWMAJOR,
1510 IPATH_USER_SWMINOR)) {
1511 dev_info(&dd->pcidev->dev,
1512 "Inconsistent ipath_compatible_subports()\n");
1513 goto bail;
1514 }
1515
1516
1517 if (!ipath_compatible_subports(uinfo->spu_userversion >> 16,
1518 uinfo->spu_userversion & 0xffff)) {
1519 dev_info(&dd->pcidev->dev,
1520 "Mismatched user version (%d.%d) and driver "
1521 "version (%d.%d) while port sharing. Ensure "
1522 "that driver and library are from the same "
1523 "release.\n",
1524 (int) (uinfo->spu_userversion >> 16),
1525 (int) (uinfo->spu_userversion & 0xffff),
1526 IPATH_USER_SWMAJOR,
1527 IPATH_USER_SWMINOR);
1528 goto bail;
1529 }
1530 if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) {
1531 ret = -EINVAL;
1532 goto bail;
1533 }
1534
1535 num_subports = uinfo->spu_subport_cnt;
1536 pd->subport_uregbase = vzalloc(PAGE_SIZE * num_subports);
1537 if (!pd->subport_uregbase) {
1538 ret = -ENOMEM;
1539 goto bail;
1540 }
1541
1542 size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize *
1543 sizeof(u32), PAGE_SIZE) * num_subports;
1544 pd->subport_rcvhdr_base = vzalloc(size);
1545 if (!pd->subport_rcvhdr_base) {
1546 ret = -ENOMEM;
1547 goto bail_ureg;
1548 }
1549
1550 pd->subport_rcvegrbuf = vzalloc(pd->port_rcvegrbuf_chunks *
1551 pd->port_rcvegrbuf_size *
1552 num_subports);
1553 if (!pd->subport_rcvegrbuf) {
1554 ret = -ENOMEM;
1555 goto bail_rhdr;
1556 }
1557
1558 pd->port_subport_cnt = uinfo->spu_subport_cnt;
1559 pd->port_subport_id = uinfo->spu_subport_id;
1560 pd->active_slaves = 1;
1561 set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag);
1562 goto bail;
1563
1564bail_rhdr:
1565 vfree(pd->subport_rcvhdr_base);
1566bail_ureg:
1567 vfree(pd->subport_uregbase);
1568 pd->subport_uregbase = NULL;
1569bail:
1570 return ret;
1571}
1572
1573static int try_alloc_port(struct ipath_devdata *dd, int port,
1574 struct file *fp,
1575 const struct ipath_user_info *uinfo)
1576{
1577 struct ipath_portdata *pd;
1578 int ret;
1579
1580 if (!(pd = dd->ipath_pd[port])) {
1581 void *ptmp;
1582
1583 pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL);
1584
1585
1586
1587
1588
1589
1590 ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) +
1591 dd->ipath_rcvtidcnt * sizeof(struct page **),
1592 GFP_KERNEL);
1593 if (!pd || !ptmp) {
1594 ipath_dev_err(dd, "Unable to allocate portdata "
1595 "memory, failing open\n");
1596 ret = -ENOMEM;
1597 kfree(pd);
1598 kfree(ptmp);
1599 goto bail;
1600 }
1601 dd->ipath_pd[port] = pd;
1602 dd->ipath_pd[port]->port_port = port;
1603 dd->ipath_pd[port]->port_dd = dd;
1604 dd->ipath_pd[port]->port_tid_pg_list = ptmp;
1605 init_waitqueue_head(&dd->ipath_pd[port]->port_wait);
1606 }
1607 if (!pd->port_cnt) {
1608 pd->userversion = uinfo->spu_userversion;
1609 init_user_egr_sizes(pd);
1610 if ((ret = init_subports(dd, pd, uinfo)) != 0)
1611 goto bail;
1612 ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n",
1613 current->comm, current->pid, dd->ipath_unit,
1614 port);
1615 pd->port_cnt = 1;
1616 port_fp(fp) = pd;
1617 pd->port_pid = get_pid(task_pid(current));
1618 strlcpy(pd->port_comm, current->comm, sizeof(pd->port_comm));
1619 ipath_stats.sps_ports++;
1620 ret = 0;
1621 } else
1622 ret = -EBUSY;
1623
1624bail:
1625 return ret;
1626}
1627
1628static inline int usable(struct ipath_devdata *dd)
1629{
1630 return dd &&
1631 (dd->ipath_flags & IPATH_PRESENT) &&
1632 dd->ipath_kregbase &&
1633 dd->ipath_lid &&
1634 !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED
1635 | IPATH_LINKUNK));
1636}
1637
1638static int find_free_port(int unit, struct file *fp,
1639 const struct ipath_user_info *uinfo)
1640{
1641 struct ipath_devdata *dd = ipath_lookup(unit);
1642 int ret, i;
1643
1644 if (!dd) {
1645 ret = -ENODEV;
1646 goto bail;
1647 }
1648
1649 if (!usable(dd)) {
1650 ret = -ENETDOWN;
1651 goto bail;
1652 }
1653
1654 for (i = 1; i < dd->ipath_cfgports; i++) {
1655 ret = try_alloc_port(dd, i, fp, uinfo);
1656 if (ret != -EBUSY)
1657 goto bail;
1658 }
1659 ret = -EBUSY;
1660
1661bail:
1662 return ret;
1663}
1664
1665static int find_best_unit(struct file *fp,
1666 const struct ipath_user_info *uinfo)
1667{
1668 int ret = 0, i, prefunit = -1, devmax;
1669 int maxofallports, npresent, nup;
1670 int ndev;
1671
1672 devmax = ipath_count_units(&npresent, &nup, &maxofallports);
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690 if (!cpumask_empty(tsk_cpus_allowed(current)) &&
1691 !cpumask_full(tsk_cpus_allowed(current))) {
1692 int ncpus = num_online_cpus(), curcpu = -1, nset = 0;
1693 get_online_cpus();
1694 for_each_online_cpu(i)
1695 if (cpumask_test_cpu(i, tsk_cpus_allowed(current))) {
1696 ipath_cdbg(PROC, "%s[%u] affinity set for "
1697 "cpu %d/%d\n", current->comm,
1698 current->pid, i, ncpus);
1699 curcpu = i;
1700 nset++;
1701 }
1702 put_online_cpus();
1703 if (curcpu != -1 && nset != ncpus) {
1704 if (npresent) {
1705 prefunit = curcpu / (ncpus / npresent);
1706 ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, "
1707 "%d cpus/chip, select unit %d\n",
1708 current->comm, current->pid,
1709 npresent, ncpus, ncpus / npresent,
1710 prefunit);
1711 }
1712 }
1713 }
1714
1715
1716
1717
1718
1719
1720 if (prefunit != -1)
1721 devmax = prefunit + 1;
1722recheck:
1723 for (i = 1; i < maxofallports; i++) {
1724 for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax;
1725 ndev++) {
1726 struct ipath_devdata *dd = ipath_lookup(ndev);
1727
1728 if (!usable(dd))
1729 continue;
1730 if (i >= dd->ipath_cfgports)
1731
1732
1733
1734
1735 continue;
1736 ret = try_alloc_port(dd, i, fp, uinfo);
1737 if (!ret)
1738 goto done;
1739 }
1740 }
1741
1742 if (npresent) {
1743 if (nup == 0) {
1744 ret = -ENETDOWN;
1745 ipath_dbg("No ports available (none initialized "
1746 "and ready)\n");
1747 } else {
1748 if (prefunit > 0) {
1749
1750 ipath_cdbg(PROC,
1751 "%s[%u] no ports on prefunit "
1752 "%d, clear and re-check\n",
1753 current->comm, current->pid,
1754 prefunit);
1755 devmax = ipath_count_units(NULL, NULL,
1756 NULL);
1757 prefunit = -1;
1758 goto recheck;
1759 }
1760 ret = -EBUSY;
1761 ipath_dbg("No ports available\n");
1762 }
1763 } else {
1764 ret = -ENXIO;
1765 ipath_dbg("No boards found\n");
1766 }
1767
1768done:
1769 return ret;
1770}
1771
1772static int find_shared_port(struct file *fp,
1773 const struct ipath_user_info *uinfo)
1774{
1775 int devmax, ndev, i;
1776 int ret = 0;
1777
1778 devmax = ipath_count_units(NULL, NULL, NULL);
1779
1780 for (ndev = 0; ndev < devmax; ndev++) {
1781 struct ipath_devdata *dd = ipath_lookup(ndev);
1782
1783 if (!usable(dd))
1784 continue;
1785 for (i = 1; i < dd->ipath_cfgports; i++) {
1786 struct ipath_portdata *pd = dd->ipath_pd[i];
1787
1788
1789 if (!pd || !pd->port_cnt)
1790 continue;
1791
1792 if (pd->port_subport_id != uinfo->spu_subport_id)
1793 continue;
1794
1795 if (pd->port_subport_cnt != uinfo->spu_subport_cnt ||
1796 pd->userversion != uinfo->spu_userversion ||
1797 pd->port_cnt >= pd->port_subport_cnt) {
1798 ret = -EINVAL;
1799 goto done;
1800 }
1801 port_fp(fp) = pd;
1802 subport_fp(fp) = pd->port_cnt++;
1803 pd->port_subpid[subport_fp(fp)] =
1804 get_pid(task_pid(current));
1805 tidcursor_fp(fp) = 0;
1806 pd->active_slaves |= 1 << subport_fp(fp);
1807 ipath_cdbg(PROC,
1808 "%s[%u] %u sharing %s[%u] unit:port %u:%u\n",
1809 current->comm, current->pid,
1810 subport_fp(fp),
1811 pd->port_comm, pid_nr(pd->port_pid),
1812 dd->ipath_unit, pd->port_port);
1813 ret = 1;
1814 goto done;
1815 }
1816 }
1817
1818done:
1819 return ret;
1820}
1821
1822static int ipath_open(struct inode *in, struct file *fp)
1823{
1824
1825 fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL);
1826 return fp->private_data ? 0 : -ENOMEM;
1827}
1828
1829
1830static int ipath_assign_port(struct file *fp,
1831 const struct ipath_user_info *uinfo)
1832{
1833 int ret;
1834 int i_minor;
1835 unsigned swmajor, swminor;
1836
1837
1838 if (port_fp(fp)) {
1839 ret = -EINVAL;
1840 goto done;
1841 }
1842
1843
1844 swmajor = uinfo->spu_userversion >> 16;
1845 if (swmajor != IPATH_USER_SWMAJOR) {
1846 ipath_dbg("User major version %d not same as driver "
1847 "major %d\n", uinfo->spu_userversion >> 16,
1848 IPATH_USER_SWMAJOR);
1849 ret = -ENODEV;
1850 goto done;
1851 }
1852
1853 swminor = uinfo->spu_userversion & 0xffff;
1854 if (swminor != IPATH_USER_SWMINOR)
1855 ipath_dbg("User minor version %d not same as driver "
1856 "minor %d\n", swminor, IPATH_USER_SWMINOR);
1857
1858 mutex_lock(&ipath_mutex);
1859
1860 if (ipath_compatible_subports(swmajor, swminor) &&
1861 uinfo->spu_subport_cnt &&
1862 (ret = find_shared_port(fp, uinfo))) {
1863 if (ret > 0)
1864 ret = 0;
1865 goto done_chk_sdma;
1866 }
1867
1868 i_minor = iminor(file_inode(fp)) - IPATH_USER_MINOR_BASE;
1869 ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n",
1870 (long)file_inode(fp)->i_rdev, i_minor);
1871
1872 if (i_minor)
1873 ret = find_free_port(i_minor - 1, fp, uinfo);
1874 else
1875 ret = find_best_unit(fp, uinfo);
1876
1877done_chk_sdma:
1878 if (!ret) {
1879 struct ipath_filedata *fd = fp->private_data;
1880 const struct ipath_portdata *pd = fd->pd;
1881 const struct ipath_devdata *dd = pd->port_dd;
1882
1883 fd->pq = ipath_user_sdma_queue_create(&dd->pcidev->dev,
1884 dd->ipath_unit,
1885 pd->port_port,
1886 fd->subport);
1887
1888 if (!fd->pq)
1889 ret = -ENOMEM;
1890 }
1891
1892 mutex_unlock(&ipath_mutex);
1893
1894done:
1895 return ret;
1896}
1897
1898
1899static int ipath_do_user_init(struct file *fp,
1900 const struct ipath_user_info *uinfo)
1901{
1902 int ret;
1903 struct ipath_portdata *pd = port_fp(fp);
1904 struct ipath_devdata *dd;
1905 u32 head32;
1906
1907
1908 if (subport_fp(fp)) {
1909 ret = wait_event_interruptible(pd->port_wait,
1910 !test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag));
1911 goto done;
1912 }
1913
1914 dd = pd->port_dd;
1915
1916 if (uinfo->spu_rcvhdrsize) {
1917 ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize);
1918 if (ret)
1919 goto done;
1920 }
1921
1922
1923
1924
1925 if (pd->port_port <= dd->ipath_ports_extrabuf)
1926 pd->port_piocnt = dd->ipath_pbufsport + 1;
1927 else
1928 pd->port_piocnt = dd->ipath_pbufsport;
1929
1930
1931 if (pd->port_port <= dd->ipath_ports_extrabuf)
1932 pd->port_pio_base = (dd->ipath_pbufsport + 1)
1933 * (pd->port_port - 1);
1934 else
1935 pd->port_pio_base = dd->ipath_ports_extrabuf +
1936 dd->ipath_pbufsport * (pd->port_port - 1);
1937 pd->port_piobufs = dd->ipath_piobufbase +
1938 pd->port_pio_base * dd->ipath_palign;
1939 ipath_cdbg(VERBOSE, "piobuf base for port %u is 0x%x, piocnt %u,"
1940 " first pio %u\n", pd->port_port, pd->port_piobufs,
1941 pd->port_piocnt, pd->port_pio_base);
1942 ipath_chg_pioavailkernel(dd, pd->port_pio_base, pd->port_piocnt, 0);
1943
1944
1945
1946
1947
1948
1949
1950 ret = ipath_create_rcvhdrq(dd, pd);
1951 if (!ret)
1952 ret = ipath_create_user_egr(pd);
1953 if (ret)
1954 goto done;
1955
1956
1957
1958
1959
1960
1961 head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port);
1962 ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port);
1963 pd->port_lastrcvhdrqtail = -1;
1964 ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n",
1965 pd->port_port, head32);
1966 pd->port_tidcursor = 0;
1967
1968
1969 pd->port_urgent = 0;
1970 pd->port_urgent_poll = 0;
1971 pd->port_hdrqfull_poll = pd->port_hdrqfull;
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984 set_bit(dd->ipath_r_portenable_shift + pd->port_port,
1985 &dd->ipath_rcvctrl);
1986 if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) {
1987 if (pd->port_rcvhdrtail_kvaddr)
1988 ipath_clear_rcvhdrtail(pd);
1989 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1990 dd->ipath_rcvctrl &
1991 ~(1ULL << dd->ipath_r_tailupd_shift));
1992 }
1993 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1994 dd->ipath_rcvctrl);
1995
1996 if (pd->port_subport_cnt) {
1997 clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag);
1998 wake_up(&pd->port_wait);
1999 }
2000done:
2001 return ret;
2002}
2003
2004
2005
2006
2007
2008
2009
2010
2011static void unlock_expected_tids(struct ipath_portdata *pd)
2012{
2013 struct ipath_devdata *dd = pd->port_dd;
2014 int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt;
2015 int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt;
2016
2017 ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n",
2018 pd->port_port);
2019 for (i = port_tidbase; i < maxtid; i++) {
2020 struct page *ps = dd->ipath_pageshadow[i];
2021
2022 if (!ps)
2023 continue;
2024
2025 dd->ipath_pageshadow[i] = NULL;
2026 pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i],
2027 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2028 ipath_release_user_pages_on_close(&ps, 1);
2029 cnt++;
2030 ipath_stats.sps_pageunlocks++;
2031 }
2032 if (cnt)
2033 ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n",
2034 pd->port_port, cnt);
2035
2036 if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks)
2037 ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n",
2038 (unsigned long long) ipath_stats.sps_pagelocks,
2039 (unsigned long long)
2040 ipath_stats.sps_pageunlocks);
2041}
2042
2043static int ipath_close(struct inode *in, struct file *fp)
2044{
2045 int ret = 0;
2046 struct ipath_filedata *fd;
2047 struct ipath_portdata *pd;
2048 struct ipath_devdata *dd;
2049 unsigned long flags;
2050 unsigned port;
2051 struct pid *pid;
2052
2053 ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n",
2054 (long)in->i_rdev, fp->private_data);
2055
2056 mutex_lock(&ipath_mutex);
2057
2058 fd = fp->private_data;
2059 fp->private_data = NULL;
2060 pd = fd->pd;
2061 if (!pd) {
2062 mutex_unlock(&ipath_mutex);
2063 goto bail;
2064 }
2065
2066 dd = pd->port_dd;
2067
2068
2069 ipath_user_sdma_queue_drain(dd, fd->pq);
2070 ipath_user_sdma_queue_destroy(fd->pq);
2071
2072 if (--pd->port_cnt) {
2073
2074
2075
2076
2077
2078 pd->active_slaves &= ~(1 << fd->subport);
2079 put_pid(pd->port_subpid[fd->subport]);
2080 pd->port_subpid[fd->subport] = NULL;
2081 mutex_unlock(&ipath_mutex);
2082 goto bail;
2083 }
2084
2085 spin_lock_irqsave(&dd->ipath_uctxt_lock, flags);
2086 port = pd->port_port;
2087 dd->ipath_pd[port] = NULL;
2088 pid = pd->port_pid;
2089 pd->port_pid = NULL;
2090 spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags);
2091
2092 if (pd->port_rcvwait_to || pd->port_piowait_to
2093 || pd->port_rcvnowait || pd->port_pionowait) {
2094 ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; "
2095 "%u rcv %u, pio already\n",
2096 pd->port_port, pd->port_rcvwait_to,
2097 pd->port_piowait_to, pd->port_rcvnowait,
2098 pd->port_pionowait);
2099 pd->port_rcvwait_to = pd->port_piowait_to =
2100 pd->port_rcvnowait = pd->port_pionowait = 0;
2101 }
2102 if (pd->port_flag) {
2103 ipath_cdbg(PROC, "port %u port_flag set: 0x%lx\n",
2104 pd->port_port, pd->port_flag);
2105 pd->port_flag = 0;
2106 }
2107
2108 if (dd->ipath_kregbase) {
2109
2110 clear_bit(dd->ipath_r_portenable_shift + port,
2111 &dd->ipath_rcvctrl);
2112 clear_bit(pd->port_port + dd->ipath_r_intravail_shift,
2113 &dd->ipath_rcvctrl);
2114 ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl,
2115 dd->ipath_rcvctrl);
2116
2117
2118 (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
2119
2120
2121 ipath_clean_part_key(pd, dd);
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131 ipath_write_kreg_port(dd,
2132 dd->ipath_kregs->kr_rcvhdrtailaddr, port,
2133 dd->ipath_dummy_hdrq_phys);
2134 ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr,
2135 pd->port_port, dd->ipath_dummy_hdrq_phys);
2136
2137 ipath_disarm_piobufs(dd, pd->port_pio_base, pd->port_piocnt);
2138 ipath_chg_pioavailkernel(dd, pd->port_pio_base,
2139 pd->port_piocnt, 1);
2140
2141 dd->ipath_f_clear_tids(dd, pd->port_port);
2142
2143 if (dd->ipath_pageshadow)
2144 unlock_expected_tids(pd);
2145 ipath_stats.sps_ports--;
2146 ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n",
2147 pd->port_comm, pid_nr(pid),
2148 dd->ipath_unit, port);
2149 }
2150
2151 put_pid(pid);
2152 mutex_unlock(&ipath_mutex);
2153 ipath_free_pddata(dd, pd);
2154
2155bail:
2156 kfree(fd);
2157 return ret;
2158}
2159
2160static int ipath_port_info(struct ipath_portdata *pd, u16 subport,
2161 struct ipath_port_info __user *uinfo)
2162{
2163 struct ipath_port_info info;
2164 int nup;
2165 int ret;
2166 size_t sz;
2167
2168 (void) ipath_count_units(NULL, &nup, NULL);
2169 info.num_active = nup;
2170 info.unit = pd->port_dd->ipath_unit;
2171 info.port = pd->port_port;
2172 info.subport = subport;
2173
2174 if (ipath_supports_subports(pd->userversion >> 16,
2175 pd->userversion & 0xffff)) {
2176
2177 info.num_ports = pd->port_dd->ipath_cfgports - 1;
2178 info.num_subports = pd->port_subport_cnt;
2179 sz = sizeof(info);
2180 } else
2181 sz = sizeof(info) - 2 * sizeof(u16);
2182
2183 if (copy_to_user(uinfo, &info, sz)) {
2184 ret = -EFAULT;
2185 goto bail;
2186 }
2187 ret = 0;
2188
2189bail:
2190 return ret;
2191}
2192
2193static int ipath_get_slave_info(struct ipath_portdata *pd,
2194 void __user *slave_mask_addr)
2195{
2196 int ret = 0;
2197
2198 if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32)))
2199 ret = -EFAULT;
2200 return ret;
2201}
2202
2203static int ipath_sdma_get_inflight(struct ipath_user_sdma_queue *pq,
2204 u32 __user *inflightp)
2205{
2206 const u32 val = ipath_user_sdma_inflight_counter(pq);
2207
2208 if (put_user(val, inflightp))
2209 return -EFAULT;
2210
2211 return 0;
2212}
2213
2214static int ipath_sdma_get_complete(struct ipath_devdata *dd,
2215 struct ipath_user_sdma_queue *pq,
2216 u32 __user *completep)
2217{
2218 u32 val;
2219 int err;
2220
2221 err = ipath_user_sdma_make_progress(dd, pq);
2222 if (err < 0)
2223 return err;
2224
2225 val = ipath_user_sdma_complete_counter(pq);
2226 if (put_user(val, completep))
2227 return -EFAULT;
2228
2229 return 0;
2230}
2231
2232static ssize_t ipath_write(struct file *fp, const char __user *data,
2233 size_t count, loff_t *off)
2234{
2235 const struct ipath_cmd __user *ucmd;
2236 struct ipath_portdata *pd;
2237 const void __user *src;
2238 size_t consumed, copy;
2239 struct ipath_cmd cmd;
2240 ssize_t ret = 0;
2241 void *dest;
2242
2243 if (count < sizeof(cmd.type)) {
2244 ret = -EINVAL;
2245 goto bail;
2246 }
2247
2248 ucmd = (const struct ipath_cmd __user *) data;
2249
2250 if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) {
2251 ret = -EFAULT;
2252 goto bail;
2253 }
2254
2255 consumed = sizeof(cmd.type);
2256
2257 switch (cmd.type) {
2258 case IPATH_CMD_ASSIGN_PORT:
2259 case __IPATH_CMD_USER_INIT:
2260 case IPATH_CMD_USER_INIT:
2261 copy = sizeof(cmd.cmd.user_info);
2262 dest = &cmd.cmd.user_info;
2263 src = &ucmd->cmd.user_info;
2264 break;
2265 case IPATH_CMD_RECV_CTRL:
2266 copy = sizeof(cmd.cmd.recv_ctrl);
2267 dest = &cmd.cmd.recv_ctrl;
2268 src = &ucmd->cmd.recv_ctrl;
2269 break;
2270 case IPATH_CMD_PORT_INFO:
2271 copy = sizeof(cmd.cmd.port_info);
2272 dest = &cmd.cmd.port_info;
2273 src = &ucmd->cmd.port_info;
2274 break;
2275 case IPATH_CMD_TID_UPDATE:
2276 case IPATH_CMD_TID_FREE:
2277 copy = sizeof(cmd.cmd.tid_info);
2278 dest = &cmd.cmd.tid_info;
2279 src = &ucmd->cmd.tid_info;
2280 break;
2281 case IPATH_CMD_SET_PART_KEY:
2282 copy = sizeof(cmd.cmd.part_key);
2283 dest = &cmd.cmd.part_key;
2284 src = &ucmd->cmd.part_key;
2285 break;
2286 case __IPATH_CMD_SLAVE_INFO:
2287 copy = sizeof(cmd.cmd.slave_mask_addr);
2288 dest = &cmd.cmd.slave_mask_addr;
2289 src = &ucmd->cmd.slave_mask_addr;
2290 break;
2291 case IPATH_CMD_PIOAVAILUPD:
2292 copy = 0;
2293 src = NULL;
2294 dest = NULL;
2295 break;
2296 case IPATH_CMD_POLL_TYPE:
2297 copy = sizeof(cmd.cmd.poll_type);
2298 dest = &cmd.cmd.poll_type;
2299 src = &ucmd->cmd.poll_type;
2300 break;
2301 case IPATH_CMD_ARMLAUNCH_CTRL:
2302 copy = sizeof(cmd.cmd.armlaunch_ctrl);
2303 dest = &cmd.cmd.armlaunch_ctrl;
2304 src = &ucmd->cmd.armlaunch_ctrl;
2305 break;
2306 case IPATH_CMD_SDMA_INFLIGHT:
2307 copy = sizeof(cmd.cmd.sdma_inflight);
2308 dest = &cmd.cmd.sdma_inflight;
2309 src = &ucmd->cmd.sdma_inflight;
2310 break;
2311 case IPATH_CMD_SDMA_COMPLETE:
2312 copy = sizeof(cmd.cmd.sdma_complete);
2313 dest = &cmd.cmd.sdma_complete;
2314 src = &ucmd->cmd.sdma_complete;
2315 break;
2316 default:
2317 ret = -EINVAL;
2318 goto bail;
2319 }
2320
2321 if (copy) {
2322 if ((count - consumed) < copy) {
2323 ret = -EINVAL;
2324 goto bail;
2325 }
2326
2327 if (copy_from_user(dest, src, copy)) {
2328 ret = -EFAULT;
2329 goto bail;
2330 }
2331
2332 consumed += copy;
2333 }
2334
2335 pd = port_fp(fp);
2336 if (!pd && cmd.type != __IPATH_CMD_USER_INIT &&
2337 cmd.type != IPATH_CMD_ASSIGN_PORT) {
2338 ret = -EINVAL;
2339 goto bail;
2340 }
2341
2342 switch (cmd.type) {
2343 case IPATH_CMD_ASSIGN_PORT:
2344 ret = ipath_assign_port(fp, &cmd.cmd.user_info);
2345 if (ret)
2346 goto bail;
2347 break;
2348 case __IPATH_CMD_USER_INIT:
2349
2350 ret = ipath_assign_port(fp, &cmd.cmd.user_info);
2351 if (ret)
2352 goto bail;
2353
2354 case IPATH_CMD_USER_INIT:
2355 ret = ipath_do_user_init(fp, &cmd.cmd.user_info);
2356 if (ret)
2357 goto bail;
2358 ret = ipath_get_base_info(
2359 fp, (void __user *) (unsigned long)
2360 cmd.cmd.user_info.spu_base_info,
2361 cmd.cmd.user_info.spu_base_info_size);
2362 break;
2363 case IPATH_CMD_RECV_CTRL:
2364 ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl);
2365 break;
2366 case IPATH_CMD_PORT_INFO:
2367 ret = ipath_port_info(pd, subport_fp(fp),
2368 (struct ipath_port_info __user *)
2369 (unsigned long) cmd.cmd.port_info);
2370 break;
2371 case IPATH_CMD_TID_UPDATE:
2372 ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info);
2373 break;
2374 case IPATH_CMD_TID_FREE:
2375 ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info);
2376 break;
2377 case IPATH_CMD_SET_PART_KEY:
2378 ret = ipath_set_part_key(pd, cmd.cmd.part_key);
2379 break;
2380 case __IPATH_CMD_SLAVE_INFO:
2381 ret = ipath_get_slave_info(pd,
2382 (void __user *) (unsigned long)
2383 cmd.cmd.slave_mask_addr);
2384 break;
2385 case IPATH_CMD_PIOAVAILUPD:
2386 ipath_force_pio_avail_update(pd->port_dd);
2387 break;
2388 case IPATH_CMD_POLL_TYPE:
2389 pd->poll_type = cmd.cmd.poll_type;
2390 break;
2391 case IPATH_CMD_ARMLAUNCH_CTRL:
2392 if (cmd.cmd.armlaunch_ctrl)
2393 ipath_enable_armlaunch(pd->port_dd);
2394 else
2395 ipath_disable_armlaunch(pd->port_dd);
2396 break;
2397 case IPATH_CMD_SDMA_INFLIGHT:
2398 ret = ipath_sdma_get_inflight(user_sdma_queue_fp(fp),
2399 (u32 __user *) (unsigned long)
2400 cmd.cmd.sdma_inflight);
2401 break;
2402 case IPATH_CMD_SDMA_COMPLETE:
2403 ret = ipath_sdma_get_complete(pd->port_dd,
2404 user_sdma_queue_fp(fp),
2405 (u32 __user *) (unsigned long)
2406 cmd.cmd.sdma_complete);
2407 break;
2408 }
2409
2410 if (ret >= 0)
2411 ret = consumed;
2412
2413bail:
2414 return ret;
2415}
2416
2417static ssize_t ipath_writev(struct kiocb *iocb, const struct iovec *iov,
2418 unsigned long dim, loff_t off)
2419{
2420 struct file *filp = iocb->ki_filp;
2421 struct ipath_filedata *fp = filp->private_data;
2422 struct ipath_portdata *pd = port_fp(filp);
2423 struct ipath_user_sdma_queue *pq = fp->pq;
2424
2425 if (!dim)
2426 return -EINVAL;
2427
2428 return ipath_user_sdma_writev(pd->port_dd, pq, iov, dim);
2429}
2430
2431static struct class *ipath_class;
2432
2433static int init_cdev(int minor, char *name, const struct file_operations *fops,
2434 struct cdev **cdevp, struct device **devp)
2435{
2436 const dev_t dev = MKDEV(IPATH_MAJOR, minor);
2437 struct cdev *cdev = NULL;
2438 struct device *device = NULL;
2439 int ret;
2440
2441 cdev = cdev_alloc();
2442 if (!cdev) {
2443 printk(KERN_ERR IPATH_DRV_NAME
2444 ": Could not allocate cdev for minor %d, %s\n",
2445 minor, name);
2446 ret = -ENOMEM;
2447 goto done;
2448 }
2449
2450 cdev->owner = THIS_MODULE;
2451 cdev->ops = fops;
2452 kobject_set_name(&cdev->kobj, name);
2453
2454 ret = cdev_add(cdev, dev, 1);
2455 if (ret < 0) {
2456 printk(KERN_ERR IPATH_DRV_NAME
2457 ": Could not add cdev for minor %d, %s (err %d)\n",
2458 minor, name, -ret);
2459 goto err_cdev;
2460 }
2461
2462 device = device_create(ipath_class, NULL, dev, NULL, name);
2463
2464 if (IS_ERR(device)) {
2465 ret = PTR_ERR(device);
2466 printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
2467 "device for minor %d, %s (err %d)\n",
2468 minor, name, -ret);
2469 goto err_cdev;
2470 }
2471
2472 goto done;
2473
2474err_cdev:
2475 cdev_del(cdev);
2476 cdev = NULL;
2477
2478done:
2479 if (ret >= 0) {
2480 *cdevp = cdev;
2481 *devp = device;
2482 } else {
2483 *cdevp = NULL;
2484 *devp = NULL;
2485 }
2486
2487 return ret;
2488}
2489
2490int ipath_cdev_init(int minor, char *name, const struct file_operations *fops,
2491 struct cdev **cdevp, struct device **devp)
2492{
2493 return init_cdev(minor, name, fops, cdevp, devp);
2494}
2495
2496static void cleanup_cdev(struct cdev **cdevp,
2497 struct device **devp)
2498{
2499 struct device *dev = *devp;
2500
2501 if (dev) {
2502 device_unregister(dev);
2503 *devp = NULL;
2504 }
2505
2506 if (*cdevp) {
2507 cdev_del(*cdevp);
2508 *cdevp = NULL;
2509 }
2510}
2511
2512void ipath_cdev_cleanup(struct cdev **cdevp,
2513 struct device **devp)
2514{
2515 cleanup_cdev(cdevp, devp);
2516}
2517
2518static struct cdev *wildcard_cdev;
2519static struct device *wildcard_dev;
2520
2521static const dev_t dev = MKDEV(IPATH_MAJOR, 0);
2522
2523static int user_init(void)
2524{
2525 int ret;
2526
2527 ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME);
2528 if (ret < 0) {
2529 printk(KERN_ERR IPATH_DRV_NAME ": Could not register "
2530 "chrdev region (err %d)\n", -ret);
2531 goto done;
2532 }
2533
2534 ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME);
2535
2536 if (IS_ERR(ipath_class)) {
2537 ret = PTR_ERR(ipath_class);
2538 printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
2539 "device class (err %d)\n", -ret);
2540 goto bail;
2541 }
2542
2543 goto done;
2544bail:
2545 unregister_chrdev_region(dev, IPATH_NMINORS);
2546done:
2547 return ret;
2548}
2549
2550static void user_cleanup(void)
2551{
2552 if (ipath_class) {
2553 class_destroy(ipath_class);
2554 ipath_class = NULL;
2555 }
2556
2557 unregister_chrdev_region(dev, IPATH_NMINORS);
2558}
2559
2560static atomic_t user_count = ATOMIC_INIT(0);
2561static atomic_t user_setup = ATOMIC_INIT(0);
2562
2563int ipath_user_add(struct ipath_devdata *dd)
2564{
2565 char name[10];
2566 int ret;
2567
2568 if (atomic_inc_return(&user_count) == 1) {
2569 ret = user_init();
2570 if (ret < 0) {
2571 ipath_dev_err(dd, "Unable to set up user support: "
2572 "error %d\n", -ret);
2573 goto bail;
2574 }
2575 ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev,
2576 &wildcard_dev);
2577 if (ret < 0) {
2578 ipath_dev_err(dd, "Could not create wildcard "
2579 "minor: error %d\n", -ret);
2580 goto bail_user;
2581 }
2582
2583 atomic_set(&user_setup, 1);
2584 }
2585
2586 snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit);
2587
2588 ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops,
2589 &dd->user_cdev, &dd->user_dev);
2590 if (ret < 0)
2591 ipath_dev_err(dd, "Could not create user minor %d, %s\n",
2592 dd->ipath_unit + 1, name);
2593
2594 goto bail;
2595
2596bail_user:
2597 user_cleanup();
2598bail:
2599 return ret;
2600}
2601
2602void ipath_user_remove(struct ipath_devdata *dd)
2603{
2604 cleanup_cdev(&dd->user_cdev, &dd->user_dev);
2605
2606 if (atomic_dec_return(&user_count) == 0) {
2607 if (atomic_read(&user_setup) == 0)
2608 goto bail;
2609
2610 cleanup_cdev(&wildcard_cdev, &wildcard_dev);
2611 user_cleanup();
2612
2613 atomic_set(&user_setup, 0);
2614 }
2615bail:
2616 return;
2617}
2618