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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/vmalloc.h>
39#include <linux/highmem.h>
40#include <linux/io.h>
41#include <linux/jiffies.h>
42#include <linux/smp_lock.h>
43#include <asm/pgtable.h>
44
45#include "ipath_kernel.h"
46#include "ipath_common.h"
47#include "ipath_user_sdma.h"
48
49static int ipath_open(struct inode *, struct file *);
50static int ipath_close(struct inode *, struct file *);
51static ssize_t ipath_write(struct file *, const char __user *, size_t,
52 loff_t *);
53static ssize_t ipath_writev(struct kiocb *, const struct iovec *,
54 unsigned long , loff_t);
55static unsigned int ipath_poll(struct file *, struct poll_table_struct *);
56static int ipath_mmap(struct file *, struct vm_area_struct *);
57
58static const struct file_operations ipath_file_ops = {
59 .owner = THIS_MODULE,
60 .write = ipath_write,
61 .aio_write = ipath_writev,
62 .open = ipath_open,
63 .release = ipath_close,
64 .poll = ipath_poll,
65 .mmap = ipath_mmap
66};
67
68
69
70
71
72
73
74static u64 cvt_kvaddr(void *p)
75{
76 struct page *page;
77 u64 paddr = 0;
78
79 page = vmalloc_to_page(p);
80 if (page)
81 paddr = page_to_pfn(page) << PAGE_SHIFT;
82
83 return paddr;
84}
85
86static int ipath_get_base_info(struct file *fp,
87 void __user *ubase, size_t ubase_size)
88{
89 struct ipath_portdata *pd = port_fp(fp);
90 int ret = 0;
91 struct ipath_base_info *kinfo = NULL;
92 struct ipath_devdata *dd = pd->port_dd;
93 unsigned subport_cnt;
94 int shared, master;
95 size_t sz;
96
97 subport_cnt = pd->port_subport_cnt;
98 if (!subport_cnt) {
99 shared = 0;
100 master = 0;
101 subport_cnt = 1;
102 } else {
103 shared = 1;
104 master = !subport_fp(fp);
105 }
106
107 sz = sizeof(*kinfo);
108
109 if (!shared)
110 sz -= 7 * sizeof(u64);
111 if (ubase_size < sz) {
112 ipath_cdbg(PROC,
113 "Base size %zu, need %zu (version mismatch?)\n",
114 ubase_size, sz);
115 ret = -EINVAL;
116 goto bail;
117 }
118
119 kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL);
120 if (kinfo == NULL) {
121 ret = -ENOMEM;
122 goto bail;
123 }
124
125 ret = dd->ipath_f_get_base_info(pd, kinfo);
126 if (ret < 0)
127 goto bail;
128
129 kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt;
130 kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize;
131 kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt;
132 kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize;
133
134
135
136 kinfo->spi_rcv_egrbuftotlen =
137 pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
138 kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk;
139 kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen /
140 pd->port_rcvegrbuf_chunks;
141 kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt;
142 if (master)
143 kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt;
144
145
146
147
148 kinfo->spi_nports = dd->ipath_cfgports;
149
150 kinfo->spi_unit = dd->ipath_unit;
151
152 kinfo->spi_tid_maxsize = PAGE_SIZE;
153
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168
169 kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys;
170 kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys;
171 kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys;
172 kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys;
173 kinfo->spi_status = (u64) kinfo->spi_pioavailaddr +
174 (void *) dd->ipath_statusp -
175 (void *) dd->ipath_pioavailregs_dma;
176 if (!shared) {
177 kinfo->spi_piocnt = pd->port_piocnt;
178 kinfo->spi_piobufbase = (u64) pd->port_piobufs;
179 kinfo->__spi_uregbase = (u64) dd->ipath_uregbase +
180 dd->ipath_ureg_align * pd->port_port;
181 } else if (master) {
182 kinfo->spi_piocnt = (pd->port_piocnt / subport_cnt) +
183 (pd->port_piocnt % subport_cnt);
184
185 kinfo->spi_piobufbase = (u64) pd->port_piobufs +
186 dd->ipath_palign *
187 (pd->port_piocnt - kinfo->spi_piocnt);
188 } else {
189 unsigned slave = subport_fp(fp) - 1;
190
191 kinfo->spi_piocnt = pd->port_piocnt / subport_cnt;
192 kinfo->spi_piobufbase = (u64) pd->port_piobufs +
193 dd->ipath_palign * kinfo->spi_piocnt * slave;
194 }
195
196 if (shared) {
197 kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase +
198 dd->ipath_ureg_align * pd->port_port;
199 kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs;
200 kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base;
201 kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr;
202
203 kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase +
204 PAGE_SIZE * subport_fp(fp));
205
206 kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base +
207 pd->port_rcvhdrq_size * subport_fp(fp));
208 kinfo->spi_rcvhdr_tailaddr = 0;
209 kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf +
210 pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size *
211 subport_fp(fp));
212
213 kinfo->spi_subport_uregbase =
214 cvt_kvaddr(pd->subport_uregbase);
215 kinfo->spi_subport_rcvegrbuf =
216 cvt_kvaddr(pd->subport_rcvegrbuf);
217 kinfo->spi_subport_rcvhdr_base =
218 cvt_kvaddr(pd->subport_rcvhdr_base);
219 ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n",
220 kinfo->spi_port, kinfo->spi_runtime_flags,
221 (unsigned long long) kinfo->spi_subport_uregbase,
222 (unsigned long long) kinfo->spi_subport_rcvegrbuf,
223 (unsigned long long) kinfo->spi_subport_rcvhdr_base);
224 }
225
226 kinfo->spi_pioindex = (kinfo->spi_piobufbase - dd->ipath_piobufbase) /
227 dd->ipath_palign;
228 kinfo->spi_pioalign = dd->ipath_palign;
229
230 kinfo->spi_qpair = IPATH_KD_QP;
231
232
233
234
235
236 kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32);
237 kinfo->spi_mtu = dd->ipath_ibmaxlen;
238 kinfo->spi_port = pd->port_port;
239 kinfo->spi_subport = subport_fp(fp);
240 kinfo->spi_sw_version = IPATH_KERN_SWVERSION;
241 kinfo->spi_hw_version = dd->ipath_revision;
242
243 if (master) {
244 kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER;
245 }
246
247 sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo);
248 if (copy_to_user(ubase, kinfo, sz))
249 ret = -EFAULT;
250
251bail:
252 kfree(kinfo);
253 return ret;
254}
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282static int ipath_tid_update(struct ipath_portdata *pd, struct file *fp,
283 const struct ipath_tid_info *ti)
284{
285 int ret = 0, ntids;
286 u32 tid, porttid, cnt, i, tidcnt, tidoff;
287 u16 *tidlist;
288 struct ipath_devdata *dd = pd->port_dd;
289 u64 physaddr;
290 unsigned long vaddr;
291 u64 __iomem *tidbase;
292 unsigned long tidmap[8];
293 struct page **pagep = NULL;
294 unsigned subport = subport_fp(fp);
295
296 if (!dd->ipath_pageshadow) {
297 ret = -ENOMEM;
298 goto done;
299 }
300
301 cnt = ti->tidcnt;
302 if (!cnt) {
303 ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n",
304 (unsigned long long) ti->tidlist);
305
306
307
308 ret = -EFAULT;
309 goto done;
310 }
311 porttid = pd->port_port * dd->ipath_rcvtidcnt;
312 if (!pd->port_subport_cnt) {
313 tidcnt = dd->ipath_rcvtidcnt;
314 tid = pd->port_tidcursor;
315 tidoff = 0;
316 } else if (!subport) {
317 tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) +
318 (dd->ipath_rcvtidcnt % pd->port_subport_cnt);
319 tidoff = dd->ipath_rcvtidcnt - tidcnt;
320 porttid += tidoff;
321 tid = tidcursor_fp(fp);
322 } else {
323 tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt;
324 tidoff = tidcnt * (subport - 1);
325 porttid += tidoff;
326 tid = tidcursor_fp(fp);
327 }
328 if (cnt > tidcnt) {
329
330 dev_info(&dd->pcidev->dev, "Process tried to allocate %u "
331 "TIDs, only trying max (%u)\n", cnt, tidcnt);
332 cnt = tidcnt;
333 }
334 pagep = &((struct page **) pd->port_tid_pg_list)[tidoff];
335 tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff];
336
337 memset(tidmap, 0, sizeof(tidmap));
338
339 ntids = tidcnt;
340 tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) +
341 dd->ipath_rcvtidbase +
342 porttid * sizeof(*tidbase));
343
344 ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n",
345 pd->port_port, cnt, tid, tidbase);
346
347
348 vaddr = ti->tidvaddr;
349 if (!access_ok(VERIFY_WRITE, (void __user *) vaddr,
350 cnt * PAGE_SIZE)) {
351 ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n",
352 (void *)vaddr, cnt);
353 ret = -EFAULT;
354 goto done;
355 }
356 ret = ipath_get_user_pages(vaddr, cnt, pagep);
357 if (ret) {
358 if (ret == -EBUSY) {
359 ipath_dbg("Failed to lock addr %p, %u pages "
360 "(already locked)\n",
361 (void *) vaddr, cnt);
362
363
364
365
366
367
368 ret = 0;
369 } else {
370 dev_info(&dd->pcidev->dev,
371 "Failed to lock addr %p, %u pages: "
372 "errno %d\n", (void *) vaddr, cnt, -ret);
373 goto done;
374 }
375 }
376 for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) {
377 for (; ntids--; tid++) {
378 if (tid == tidcnt)
379 tid = 0;
380 if (!dd->ipath_pageshadow[porttid + tid])
381 break;
382 }
383 if (ntids < 0) {
384
385
386
387
388
389 ipath_dbg("Not enough free TIDs for %u pages "
390 "(index %d), failing\n", cnt, i);
391 i--;
392 ret = -ENOMEM;
393 break;
394 }
395 tidlist[i] = tid + tidoff;
396 ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, "
397 "vaddr %lx\n", i, tid + tidoff, vaddr);
398
399 dd->ipath_pageshadow[porttid + tid] = pagep[i];
400 dd->ipath_physshadow[porttid + tid] = ipath_map_page(
401 dd->pcidev, pagep[i], 0, PAGE_SIZE,
402 PCI_DMA_FROMDEVICE);
403
404
405
406 __set_bit(tid, tidmap);
407 physaddr = dd->ipath_physshadow[porttid + tid];
408 ipath_stats.sps_pagelocks++;
409 ipath_cdbg(VERBOSE,
410 "TID %u, vaddr %lx, physaddr %llx pgp %p\n",
411 tid, vaddr, (unsigned long long) physaddr,
412 pagep[i]);
413 dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED,
414 physaddr);
415
416
417
418
419 tid++;
420 }
421
422 if (ret) {
423 u32 limit;
424 cleanup:
425
426 ipath_dbg("After failure (ret=%d), undo %d of %d entries\n",
427 -ret, i, cnt);
428
429 limit = sizeof(tidmap) * BITS_PER_BYTE;
430 if (limit > tidcnt)
431
432 limit = tidcnt;
433 tid = find_first_bit((const unsigned long *)tidmap, limit);
434 for (; tid < limit; tid++) {
435 if (!test_bit(tid, tidmap))
436 continue;
437 if (dd->ipath_pageshadow[porttid + tid]) {
438 ipath_cdbg(VERBOSE, "Freeing TID %u\n",
439 tid);
440 dd->ipath_f_put_tid(dd, &tidbase[tid],
441 RCVHQ_RCV_TYPE_EXPECTED,
442 dd->ipath_tidinvalid);
443 pci_unmap_page(dd->pcidev,
444 dd->ipath_physshadow[porttid + tid],
445 PAGE_SIZE, PCI_DMA_FROMDEVICE);
446 dd->ipath_pageshadow[porttid + tid] = NULL;
447 ipath_stats.sps_pageunlocks++;
448 }
449 }
450 ipath_release_user_pages(pagep, cnt);
451 } else {
452
453
454
455
456
457 if (copy_to_user((void __user *)
458 (unsigned long) ti->tidlist,
459 tidlist, cnt * sizeof(*tidlist))) {
460 ret = -EFAULT;
461 goto cleanup;
462 }
463 if (copy_to_user((void __user *) (unsigned long) ti->tidmap,
464 tidmap, sizeof tidmap)) {
465 ret = -EFAULT;
466 goto cleanup;
467 }
468 if (tid == tidcnt)
469 tid = 0;
470 if (!pd->port_subport_cnt)
471 pd->port_tidcursor = tid;
472 else
473 tidcursor_fp(fp) = tid;
474 }
475
476done:
477 if (ret)
478 ipath_dbg("Failed to map %u TID pages, failing with %d\n",
479 ti->tidcnt, -ret);
480 return ret;
481}
482
483
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497
498
499
500static int ipath_tid_free(struct ipath_portdata *pd, unsigned subport,
501 const struct ipath_tid_info *ti)
502{
503 int ret = 0;
504 u32 tid, porttid, cnt, limit, tidcnt;
505 struct ipath_devdata *dd = pd->port_dd;
506 u64 __iomem *tidbase;
507 unsigned long tidmap[8];
508
509 if (!dd->ipath_pageshadow) {
510 ret = -ENOMEM;
511 goto done;
512 }
513
514 if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap,
515 sizeof tidmap)) {
516 ret = -EFAULT;
517 goto done;
518 }
519
520 porttid = pd->port_port * dd->ipath_rcvtidcnt;
521 if (!pd->port_subport_cnt)
522 tidcnt = dd->ipath_rcvtidcnt;
523 else if (!subport) {
524 tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) +
525 (dd->ipath_rcvtidcnt % pd->port_subport_cnt);
526 porttid += dd->ipath_rcvtidcnt - tidcnt;
527 } else {
528 tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt;
529 porttid += tidcnt * (subport - 1);
530 }
531 tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
532 dd->ipath_rcvtidbase +
533 porttid * sizeof(*tidbase));
534
535 limit = sizeof(tidmap) * BITS_PER_BYTE;
536 if (limit > tidcnt)
537
538 limit = tidcnt;
539 tid = find_first_bit(tidmap, limit);
540 ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) "
541 "set is %d, porttid %u\n", pd->port_port, ti->tidcnt,
542 limit, tid, porttid);
543 for (cnt = 0; tid < limit; tid++) {
544
545
546
547
548
549
550
551 if (!test_bit(tid, tidmap))
552 continue;
553 cnt++;
554 if (dd->ipath_pageshadow[porttid + tid]) {
555 struct page *p;
556 p = dd->ipath_pageshadow[porttid + tid];
557 dd->ipath_pageshadow[porttid + tid] = NULL;
558 ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n",
559 pid_nr(pd->port_pid), tid);
560 dd->ipath_f_put_tid(dd, &tidbase[tid],
561 RCVHQ_RCV_TYPE_EXPECTED,
562 dd->ipath_tidinvalid);
563 pci_unmap_page(dd->pcidev,
564 dd->ipath_physshadow[porttid + tid],
565 PAGE_SIZE, PCI_DMA_FROMDEVICE);
566 ipath_release_user_pages(&p, 1);
567 ipath_stats.sps_pageunlocks++;
568 } else
569 ipath_dbg("Unused tid %u, ignoring\n", tid);
570 }
571 if (cnt != ti->tidcnt)
572 ipath_dbg("passed in tidcnt %d, only %d bits set in map\n",
573 ti->tidcnt, cnt);
574done:
575 if (ret)
576 ipath_dbg("Failed to unmap %u TID pages, failing with %d\n",
577 ti->tidcnt, -ret);
578 return ret;
579}
580
581
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584
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591
592
593
594
595
596
597static int ipath_set_part_key(struct ipath_portdata *pd, u16 key)
598{
599 struct ipath_devdata *dd = pd->port_dd;
600 int i, any = 0, pidx = -1;
601 u16 lkey = key & 0x7FFF;
602 int ret;
603
604 if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) {
605
606 ret = 0;
607 goto bail;
608 }
609
610 ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys "
611 "%hx:%x %hx:%x %hx:%x %hx:%x\n",
612 pd->port_port, key, dd->ipath_pkeys[0],
613 atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1],
614 atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2],
615 atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3],
616 atomic_read(&dd->ipath_pkeyrefs[3]));
617
618 if (!lkey) {
619 ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n",
620 pd->port_port);
621 ret = -EINVAL;
622 goto bail;
623 }
624
625
626
627
628
629
630
631 key |= 0x8000;
632
633 for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
634 if (!pd->port_pkeys[i] && pidx == -1)
635 pidx = i;
636 if (pd->port_pkeys[i] == key) {
637 ipath_cdbg(VERBOSE, "p%u tries to set same pkey "
638 "(%x) more than once\n",
639 pd->port_port, key);
640 ret = -EEXIST;
641 goto bail;
642 }
643 }
644 if (pidx == -1) {
645 ipath_dbg("All pkeys for port %u already in use, "
646 "can't set %x\n", pd->port_port, key);
647 ret = -EBUSY;
648 goto bail;
649 }
650 for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
651 if (!dd->ipath_pkeys[i]) {
652 any++;
653 continue;
654 }
655 if (dd->ipath_pkeys[i] == key) {
656 atomic_t *pkrefs = &dd->ipath_pkeyrefs[i];
657
658 if (atomic_inc_return(pkrefs) > 1) {
659 pd->port_pkeys[pidx] = key;
660 ipath_cdbg(VERBOSE, "p%u set key %x "
661 "matches #%d, count now %d\n",
662 pd->port_port, key, i,
663 atomic_read(pkrefs));
664 ret = 0;
665 goto bail;
666 } else {
667
668
669
670 atomic_dec(pkrefs);
671 ipath_cdbg(VERBOSE, "Lost race, count was "
672 "0, after dec, it's %d\n",
673 atomic_read(pkrefs));
674 any++;
675 }
676 }
677 if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
678
679
680
681
682
683 ret = -EEXIST;
684 goto bail;
685 }
686 }
687 if (!any) {
688 ipath_dbg("port %u, all pkeys already in use, "
689 "can't set %x\n", pd->port_port, key);
690 ret = -EBUSY;
691 goto bail;
692 }
693 for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
694 if (!dd->ipath_pkeys[i] &&
695 atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
696 u64 pkey;
697
698
699 ipath_stats.sps_pkeys[i] = lkey;
700 pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key;
701 pkey =
702 (u64) dd->ipath_pkeys[0] |
703 ((u64) dd->ipath_pkeys[1] << 16) |
704 ((u64) dd->ipath_pkeys[2] << 32) |
705 ((u64) dd->ipath_pkeys[3] << 48);
706 ipath_cdbg(PROC, "p%u set key %x in #%d, "
707 "portidx %d, new pkey reg %llx\n",
708 pd->port_port, key, i, pidx,
709 (unsigned long long) pkey);
710 ipath_write_kreg(
711 dd, dd->ipath_kregs->kr_partitionkey, pkey);
712
713 ret = 0;
714 goto bail;
715 }
716 }
717 ipath_dbg("port %u, all pkeys already in use 2nd pass, "
718 "can't set %x\n", pd->port_port, key);
719 ret = -EBUSY;
720
721bail:
722 return ret;
723}
724
725
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727
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729
730
731
732
733
734
735static int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport,
736 int start_stop)
737{
738 struct ipath_devdata *dd = pd->port_dd;
739
740 ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n",
741 start_stop ? "en" : "dis", dd->ipath_unit,
742 pd->port_port, subport);
743 if (subport)
744 goto bail;
745
746 if (start_stop) {
747
748
749
750
751
752
753
754
755
756
757
758
759 if (pd->port_rcvhdrtail_kvaddr)
760 ipath_clear_rcvhdrtail(pd);
761 set_bit(dd->ipath_r_portenable_shift + pd->port_port,
762 &dd->ipath_rcvctrl);
763 } else
764 clear_bit(dd->ipath_r_portenable_shift + pd->port_port,
765 &dd->ipath_rcvctrl);
766 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
767 dd->ipath_rcvctrl);
768
769 ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
770 if (start_stop) {
771
772
773
774
775
776
777
778 ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
779 }
780
781bail:
782 return 0;
783}
784
785static void ipath_clean_part_key(struct ipath_portdata *pd,
786 struct ipath_devdata *dd)
787{
788 int i, j, pchanged = 0;
789 u64 oldpkey;
790
791
792 oldpkey = (u64) dd->ipath_pkeys[0] |
793 ((u64) dd->ipath_pkeys[1] << 16) |
794 ((u64) dd->ipath_pkeys[2] << 32) |
795 ((u64) dd->ipath_pkeys[3] << 48);
796
797 for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
798 if (!pd->port_pkeys[i])
799 continue;
800 ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i,
801 pd->port_pkeys[i]);
802 for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) {
803
804 if ((dd->ipath_pkeys[j] & 0x7fff) !=
805 (pd->port_pkeys[i] & 0x7fff))
806 continue;
807 if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) {
808 ipath_cdbg(VERBOSE, "p%u clear key "
809 "%x matches #%d\n",
810 pd->port_port,
811 pd->port_pkeys[i], j);
812 ipath_stats.sps_pkeys[j] =
813 dd->ipath_pkeys[j] = 0;
814 pchanged++;
815 }
816 else ipath_cdbg(
817 VERBOSE, "p%u key %x matches #%d, "
818 "but ref still %d\n", pd->port_port,
819 pd->port_pkeys[i], j,
820 atomic_read(&dd->ipath_pkeyrefs[j]));
821 break;
822 }
823 pd->port_pkeys[i] = 0;
824 }
825 if (pchanged) {
826 u64 pkey = (u64) dd->ipath_pkeys[0] |
827 ((u64) dd->ipath_pkeys[1] << 16) |
828 ((u64) dd->ipath_pkeys[2] << 32) |
829 ((u64) dd->ipath_pkeys[3] << 48);
830 ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, "
831 "new pkey reg %llx\n", pd->port_port,
832 (unsigned long long) oldpkey,
833 (unsigned long long) pkey);
834 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
835 pkey);
836 }
837}
838
839
840
841
842
843
844
845static void init_user_egr_sizes(struct ipath_portdata *pd)
846{
847 struct ipath_devdata *dd = pd->port_dd;
848 unsigned egrperchunk, egrcnt, size;
849
850
851
852
853
854
855
856
857
858
859
860
861 size = 0x8000;
862 egrperchunk = size / dd->ipath_rcvegrbufsize;
863 egrcnt = dd->ipath_rcvegrcnt;
864 pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk;
865 pd->port_rcvegrbufs_perchunk = egrperchunk;
866 pd->port_rcvegrbuf_size = size;
867}
868
869
870
871
872
873
874
875
876
877
878
879
880
881static int ipath_create_user_egr(struct ipath_portdata *pd)
882{
883 struct ipath_devdata *dd = pd->port_dd;
884 unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff;
885 size_t size;
886 int ret;
887 gfp_t gfp_flags;
888
889
890
891
892
893
894
895 gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP;
896
897 egrcnt = dd->ipath_rcvegrcnt;
898
899 egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt;
900 egrsize = dd->ipath_rcvegrbufsize;
901 ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid "
902 "offset %x, egrsize %u\n", egrcnt, egroff, egrsize);
903
904 chunk = pd->port_rcvegrbuf_chunks;
905 egrperchunk = pd->port_rcvegrbufs_perchunk;
906 size = pd->port_rcvegrbuf_size;
907 pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]),
908 GFP_KERNEL);
909 if (!pd->port_rcvegrbuf) {
910 ret = -ENOMEM;
911 goto bail;
912 }
913 pd->port_rcvegrbuf_phys =
914 kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]),
915 GFP_KERNEL);
916 if (!pd->port_rcvegrbuf_phys) {
917 ret = -ENOMEM;
918 goto bail_rcvegrbuf;
919 }
920 for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) {
921
922 pd->port_rcvegrbuf[e] = dma_alloc_coherent(
923 &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e],
924 gfp_flags);
925
926 if (!pd->port_rcvegrbuf[e]) {
927 ret = -ENOMEM;
928 goto bail_rcvegrbuf_phys;
929 }
930 }
931
932 pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0];
933
934 for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) {
935 dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk];
936 unsigned i;
937
938 for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
939 dd->ipath_f_put_tid(dd, e + egroff +
940 (u64 __iomem *)
941 ((char __iomem *)
942 dd->ipath_kregbase +
943 dd->ipath_rcvegrbase),
944 RCVHQ_RCV_TYPE_EAGER, pa);
945 pa += egrsize;
946 }
947 cond_resched();
948 }
949
950 ret = 0;
951 goto bail;
952
953bail_rcvegrbuf_phys:
954 for (e = 0; e < pd->port_rcvegrbuf_chunks &&
955 pd->port_rcvegrbuf[e]; e++) {
956 dma_free_coherent(&dd->pcidev->dev, size,
957 pd->port_rcvegrbuf[e],
958 pd->port_rcvegrbuf_phys[e]);
959
960 }
961 kfree(pd->port_rcvegrbuf_phys);
962 pd->port_rcvegrbuf_phys = NULL;
963bail_rcvegrbuf:
964 kfree(pd->port_rcvegrbuf);
965 pd->port_rcvegrbuf = NULL;
966bail:
967 return ret;
968}
969
970
971
972static int ipath_mmap_mem(struct vm_area_struct *vma,
973 struct ipath_portdata *pd, unsigned len, int write_ok,
974 void *kvaddr, char *what)
975{
976 struct ipath_devdata *dd = pd->port_dd;
977 unsigned long pfn;
978 int ret;
979
980 if ((vma->vm_end - vma->vm_start) > len) {
981 dev_info(&dd->pcidev->dev,
982 "FAIL on %s: len %lx > %x\n", what,
983 vma->vm_end - vma->vm_start, len);
984 ret = -EFAULT;
985 goto bail;
986 }
987
988 if (!write_ok) {
989 if (vma->vm_flags & VM_WRITE) {
990 dev_info(&dd->pcidev->dev,
991 "%s must be mapped readonly\n", what);
992 ret = -EPERM;
993 goto bail;
994 }
995
996
997 vma->vm_flags &= ~VM_MAYWRITE;
998 }
999
1000 pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT;
1001 ret = remap_pfn_range(vma, vma->vm_start, pfn,
1002 len, vma->vm_page_prot);
1003 if (ret)
1004 dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x "
1005 "bytes r%c failed: %d\n", what, pd->port_port,
1006 pfn, len, write_ok?'w':'o', ret);
1007 else
1008 ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes "
1009 "r%c\n", what, pd->port_port, pfn, len,
1010 write_ok?'w':'o');
1011bail:
1012 return ret;
1013}
1014
1015static int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd,
1016 u64 ureg)
1017{
1018 unsigned long phys;
1019 int ret;
1020
1021
1022
1023
1024
1025
1026 if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) {
1027 dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen "
1028 "%lx > PAGE\n", vma->vm_end - vma->vm_start);
1029 ret = -EFAULT;
1030 } else {
1031 phys = dd->ipath_physaddr + ureg;
1032 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1033
1034 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
1035 ret = io_remap_pfn_range(vma, vma->vm_start,
1036 phys >> PAGE_SHIFT,
1037 vma->vm_end - vma->vm_start,
1038 vma->vm_page_prot);
1039 }
1040 return ret;
1041}
1042
1043static int mmap_piobufs(struct vm_area_struct *vma,
1044 struct ipath_devdata *dd,
1045 struct ipath_portdata *pd,
1046 unsigned piobufs, unsigned piocnt)
1047{
1048 unsigned long phys;
1049 int ret;
1050
1051
1052
1053
1054
1055
1056
1057 if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) {
1058 dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: "
1059 "reqlen %lx > PAGE\n",
1060 vma->vm_end - vma->vm_start);
1061 ret = -EINVAL;
1062 goto bail;
1063 }
1064
1065 phys = dd->ipath_physaddr + piobufs;
1066
1067#if defined(__powerpc__)
1068
1069 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1070 pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU;
1071 pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED;
1072#endif
1073
1074
1075
1076
1077
1078 vma->vm_flags &= ~VM_MAYREAD;
1079 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
1080
1081 ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT,
1082 vma->vm_end - vma->vm_start,
1083 vma->vm_page_prot);
1084bail:
1085 return ret;
1086}
1087
1088static int mmap_rcvegrbufs(struct vm_area_struct *vma,
1089 struct ipath_portdata *pd)
1090{
1091 struct ipath_devdata *dd = pd->port_dd;
1092 unsigned long start, size;
1093 size_t total_size, i;
1094 unsigned long pfn;
1095 int ret;
1096
1097 size = pd->port_rcvegrbuf_size;
1098 total_size = pd->port_rcvegrbuf_chunks * size;
1099 if ((vma->vm_end - vma->vm_start) > total_size) {
1100 dev_info(&dd->pcidev->dev, "FAIL on egr bufs: "
1101 "reqlen %lx > actual %lx\n",
1102 vma->vm_end - vma->vm_start,
1103 (unsigned long) total_size);
1104 ret = -EINVAL;
1105 goto bail;
1106 }
1107
1108 if (vma->vm_flags & VM_WRITE) {
1109 dev_info(&dd->pcidev->dev, "Can't map eager buffers as "
1110 "writable (flags=%lx)\n", vma->vm_flags);
1111 ret = -EPERM;
1112 goto bail;
1113 }
1114
1115 vma->vm_flags &= ~VM_MAYWRITE;
1116
1117 start = vma->vm_start;
1118
1119 for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) {
1120 pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT;
1121 ret = remap_pfn_range(vma, start, pfn, size,
1122 vma->vm_page_prot);
1123 if (ret < 0)
1124 goto bail;
1125 }
1126 ret = 0;
1127
1128bail:
1129 return ret;
1130}
1131
1132
1133
1134
1135static int ipath_file_vma_fault(struct vm_area_struct *vma,
1136 struct vm_fault *vmf)
1137{
1138 struct page *page;
1139
1140 page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT));
1141 if (!page)
1142 return VM_FAULT_SIGBUS;
1143 get_page(page);
1144 vmf->page = page;
1145
1146 return 0;
1147}
1148
1149static struct vm_operations_struct ipath_file_vm_ops = {
1150 .fault = ipath_file_vma_fault,
1151};
1152
1153static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,
1154 struct ipath_portdata *pd, unsigned subport)
1155{
1156 unsigned long len;
1157 struct ipath_devdata *dd;
1158 void *addr;
1159 size_t size;
1160 int ret = 0;
1161
1162
1163 if (!pd->port_subport_cnt)
1164 goto bail;
1165
1166 dd = pd->port_dd;
1167 size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
1168
1169
1170
1171
1172
1173
1174 if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) {
1175 addr = pd->subport_uregbase;
1176 size = PAGE_SIZE * pd->port_subport_cnt;
1177 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) {
1178 addr = pd->subport_rcvhdr_base;
1179 size = pd->port_rcvhdrq_size * pd->port_subport_cnt;
1180 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) {
1181 addr = pd->subport_rcvegrbuf;
1182 size *= pd->port_subport_cnt;
1183 } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase +
1184 PAGE_SIZE * subport)) {
1185 addr = pd->subport_uregbase + PAGE_SIZE * subport;
1186 size = PAGE_SIZE;
1187 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base +
1188 pd->port_rcvhdrq_size * subport)) {
1189 addr = pd->subport_rcvhdr_base +
1190 pd->port_rcvhdrq_size * subport;
1191 size = pd->port_rcvhdrq_size;
1192 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf +
1193 size * subport)) {
1194 addr = pd->subport_rcvegrbuf + size * subport;
1195
1196 if (vma->vm_flags & VM_WRITE) {
1197 dev_info(&dd->pcidev->dev,
1198 "Can't map eager buffers as "
1199 "writable (flags=%lx)\n", vma->vm_flags);
1200 ret = -EPERM;
1201 goto bail;
1202 }
1203
1204
1205
1206
1207 vma->vm_flags &= ~VM_MAYWRITE;
1208 } else {
1209 goto bail;
1210 }
1211 len = vma->vm_end - vma->vm_start;
1212 if (len > size) {
1213 ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size);
1214 ret = -EINVAL;
1215 goto bail;
1216 }
1217
1218 vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT;
1219 vma->vm_ops = &ipath_file_vm_ops;
1220 vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
1221 ret = 1;
1222
1223bail:
1224 return ret;
1225}
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237static int ipath_mmap(struct file *fp, struct vm_area_struct *vma)
1238{
1239 struct ipath_portdata *pd;
1240 struct ipath_devdata *dd;
1241 u64 pgaddr, ureg;
1242 unsigned piobufs, piocnt;
1243 int ret;
1244
1245 pd = port_fp(fp);
1246 if (!pd) {
1247 ret = -EINVAL;
1248 goto bail;
1249 }
1250 dd = pd->port_dd;
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260 pgaddr = vma->vm_pgoff << PAGE_SHIFT;
1261
1262
1263
1264
1265
1266 if (!pgaddr) {
1267 ret = -EINVAL;
1268 goto bail;
1269 }
1270
1271 ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n",
1272 (unsigned long long) pgaddr, vma->vm_start,
1273 vma->vm_end - vma->vm_start, dd->ipath_unit,
1274 pd->port_port, subport_fp(fp));
1275
1276
1277
1278
1279
1280
1281 ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp));
1282 if (ret) {
1283 if (ret > 0)
1284 ret = 0;
1285 goto bail;
1286 }
1287
1288 ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port;
1289 if (!pd->port_subport_cnt) {
1290
1291 piocnt = pd->port_piocnt;
1292 piobufs = pd->port_piobufs;
1293 } else if (!subport_fp(fp)) {
1294
1295 piocnt = (pd->port_piocnt / pd->port_subport_cnt) +
1296 (pd->port_piocnt % pd->port_subport_cnt);
1297 piobufs = pd->port_piobufs +
1298 dd->ipath_palign * (pd->port_piocnt - piocnt);
1299 } else {
1300 unsigned slave = subport_fp(fp) - 1;
1301
1302
1303 piocnt = pd->port_piocnt / pd->port_subport_cnt;
1304 piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave;
1305 }
1306
1307 if (pgaddr == ureg)
1308 ret = mmap_ureg(vma, dd, ureg);
1309 else if (pgaddr == piobufs)
1310 ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt);
1311 else if (pgaddr == dd->ipath_pioavailregs_phys)
1312
1313 ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0,
1314 (void *) dd->ipath_pioavailregs_dma,
1315 "pioavail registers");
1316 else if (pgaddr == pd->port_rcvegr_phys)
1317 ret = mmap_rcvegrbufs(vma, pd);
1318 else if (pgaddr == (u64) pd->port_rcvhdrq_phys)
1319
1320
1321
1322
1323
1324 ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1,
1325 pd->port_rcvhdrq,
1326 "rcvhdrq");
1327 else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys)
1328
1329 ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0,
1330 pd->port_rcvhdrtail_kvaddr,
1331 "rcvhdrq tail");
1332 else
1333 ret = -EINVAL;
1334
1335 vma->vm_private_data = NULL;
1336
1337 if (ret < 0)
1338 dev_info(&dd->pcidev->dev,
1339 "Failure %d on off %llx len %lx\n",
1340 -ret, (unsigned long long)pgaddr,
1341 vma->vm_end - vma->vm_start);
1342bail:
1343 return ret;
1344}
1345
1346static unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd)
1347{
1348 unsigned pollflag = 0;
1349
1350 if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) &&
1351 pd->port_hdrqfull != pd->port_hdrqfull_poll) {
1352 pollflag |= POLLIN | POLLRDNORM;
1353 pd->port_hdrqfull_poll = pd->port_hdrqfull;
1354 }
1355
1356 return pollflag;
1357}
1358
1359static unsigned int ipath_poll_urgent(struct ipath_portdata *pd,
1360 struct file *fp,
1361 struct poll_table_struct *pt)
1362{
1363 unsigned pollflag = 0;
1364 struct ipath_devdata *dd;
1365
1366 dd = pd->port_dd;
1367
1368
1369 rmb();
1370 pollflag = ipath_poll_hdrqfull(pd);
1371
1372 if (pd->port_urgent != pd->port_urgent_poll) {
1373 pollflag |= POLLIN | POLLRDNORM;
1374 pd->port_urgent_poll = pd->port_urgent;
1375 }
1376
1377 if (!pollflag) {
1378
1379 set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag);
1380
1381 wmb();
1382 poll_wait(fp, &pd->port_wait, pt);
1383 }
1384
1385 return pollflag;
1386}
1387
1388static unsigned int ipath_poll_next(struct ipath_portdata *pd,
1389 struct file *fp,
1390 struct poll_table_struct *pt)
1391{
1392 u32 head;
1393 u32 tail;
1394 unsigned pollflag = 0;
1395 struct ipath_devdata *dd;
1396
1397 dd = pd->port_dd;
1398
1399
1400 rmb();
1401 pollflag = ipath_poll_hdrqfull(pd);
1402
1403 head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port);
1404 if (pd->port_rcvhdrtail_kvaddr)
1405 tail = ipath_get_rcvhdrtail(pd);
1406 else
1407 tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
1408
1409 if (head != tail)
1410 pollflag |= POLLIN | POLLRDNORM;
1411 else {
1412
1413 set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag);
1414
1415 wmb();
1416
1417 set_bit(pd->port_port + dd->ipath_r_intravail_shift,
1418 &dd->ipath_rcvctrl);
1419
1420 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1421 dd->ipath_rcvctrl);
1422
1423 if (dd->ipath_rhdrhead_intr_off)
1424 ipath_write_ureg(dd, ur_rcvhdrhead,
1425 dd->ipath_rhdrhead_intr_off | head,
1426 pd->port_port);
1427
1428 poll_wait(fp, &pd->port_wait, pt);
1429 }
1430
1431 return pollflag;
1432}
1433
1434static unsigned int ipath_poll(struct file *fp,
1435 struct poll_table_struct *pt)
1436{
1437 struct ipath_portdata *pd;
1438 unsigned pollflag;
1439
1440 pd = port_fp(fp);
1441 if (!pd)
1442 pollflag = 0;
1443 else if (pd->poll_type & IPATH_POLL_TYPE_URGENT)
1444 pollflag = ipath_poll_urgent(pd, fp, pt);
1445 else
1446 pollflag = ipath_poll_next(pd, fp, pt);
1447
1448 return pollflag;
1449}
1450
1451static int ipath_supports_subports(int user_swmajor, int user_swminor)
1452{
1453
1454 return (user_swmajor > 1) || (user_swminor >= 3);
1455}
1456
1457static int ipath_compatible_subports(int user_swmajor, int user_swminor)
1458{
1459
1460 if (IPATH_USER_SWMAJOR != user_swmajor) {
1461
1462 return 0;
1463 }
1464 if (IPATH_USER_SWMAJOR == 1) {
1465 switch (IPATH_USER_SWMINOR) {
1466 case 0:
1467 case 1:
1468 case 2:
1469
1470 return 0;
1471 case 3:
1472
1473 return user_swminor == 3;
1474 default:
1475
1476 return user_swminor >= 4;
1477 }
1478 }
1479
1480 return 0;
1481}
1482
1483static int init_subports(struct ipath_devdata *dd,
1484 struct ipath_portdata *pd,
1485 const struct ipath_user_info *uinfo)
1486{
1487 int ret = 0;
1488 unsigned num_subports;
1489 size_t size;
1490
1491
1492
1493
1494
1495 if (uinfo->spu_subport_cnt <= 0)
1496 goto bail;
1497
1498
1499 if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) &&
1500 !ipath_compatible_subports(IPATH_USER_SWMAJOR,
1501 IPATH_USER_SWMINOR)) {
1502 dev_info(&dd->pcidev->dev,
1503 "Inconsistent ipath_compatible_subports()\n");
1504 goto bail;
1505 }
1506
1507
1508 if (!ipath_compatible_subports(uinfo->spu_userversion >> 16,
1509 uinfo->spu_userversion & 0xffff)) {
1510 dev_info(&dd->pcidev->dev,
1511 "Mismatched user version (%d.%d) and driver "
1512 "version (%d.%d) while port sharing. Ensure "
1513 "that driver and library are from the same "
1514 "release.\n",
1515 (int) (uinfo->spu_userversion >> 16),
1516 (int) (uinfo->spu_userversion & 0xffff),
1517 IPATH_USER_SWMAJOR,
1518 IPATH_USER_SWMINOR);
1519 goto bail;
1520 }
1521 if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) {
1522 ret = -EINVAL;
1523 goto bail;
1524 }
1525
1526 num_subports = uinfo->spu_subport_cnt;
1527 pd->subport_uregbase = vmalloc(PAGE_SIZE * num_subports);
1528 if (!pd->subport_uregbase) {
1529 ret = -ENOMEM;
1530 goto bail;
1531 }
1532
1533 size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize *
1534 sizeof(u32), PAGE_SIZE) * num_subports;
1535 pd->subport_rcvhdr_base = vmalloc(size);
1536 if (!pd->subport_rcvhdr_base) {
1537 ret = -ENOMEM;
1538 goto bail_ureg;
1539 }
1540
1541 pd->subport_rcvegrbuf = vmalloc(pd->port_rcvegrbuf_chunks *
1542 pd->port_rcvegrbuf_size *
1543 num_subports);
1544 if (!pd->subport_rcvegrbuf) {
1545 ret = -ENOMEM;
1546 goto bail_rhdr;
1547 }
1548
1549 pd->port_subport_cnt = uinfo->spu_subport_cnt;
1550 pd->port_subport_id = uinfo->spu_subport_id;
1551 pd->active_slaves = 1;
1552 set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag);
1553 memset(pd->subport_uregbase, 0, PAGE_SIZE * num_subports);
1554 memset(pd->subport_rcvhdr_base, 0, size);
1555 memset(pd->subport_rcvegrbuf, 0, pd->port_rcvegrbuf_chunks *
1556 pd->port_rcvegrbuf_size *
1557 num_subports);
1558 goto bail;
1559
1560bail_rhdr:
1561 vfree(pd->subport_rcvhdr_base);
1562bail_ureg:
1563 vfree(pd->subport_uregbase);
1564 pd->subport_uregbase = NULL;
1565bail:
1566 return ret;
1567}
1568
1569static int try_alloc_port(struct ipath_devdata *dd, int port,
1570 struct file *fp,
1571 const struct ipath_user_info *uinfo)
1572{
1573 struct ipath_portdata *pd;
1574 int ret;
1575
1576 if (!(pd = dd->ipath_pd[port])) {
1577 void *ptmp;
1578
1579 pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL);
1580
1581
1582
1583
1584
1585
1586 ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) +
1587 dd->ipath_rcvtidcnt * sizeof(struct page **),
1588 GFP_KERNEL);
1589 if (!pd || !ptmp) {
1590 ipath_dev_err(dd, "Unable to allocate portdata "
1591 "memory, failing open\n");
1592 ret = -ENOMEM;
1593 kfree(pd);
1594 kfree(ptmp);
1595 goto bail;
1596 }
1597 dd->ipath_pd[port] = pd;
1598 dd->ipath_pd[port]->port_port = port;
1599 dd->ipath_pd[port]->port_dd = dd;
1600 dd->ipath_pd[port]->port_tid_pg_list = ptmp;
1601 init_waitqueue_head(&dd->ipath_pd[port]->port_wait);
1602 }
1603 if (!pd->port_cnt) {
1604 pd->userversion = uinfo->spu_userversion;
1605 init_user_egr_sizes(pd);
1606 if ((ret = init_subports(dd, pd, uinfo)) != 0)
1607 goto bail;
1608 ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n",
1609 current->comm, current->pid, dd->ipath_unit,
1610 port);
1611 pd->port_cnt = 1;
1612 port_fp(fp) = pd;
1613 pd->port_pid = get_pid(task_pid(current));
1614 strncpy(pd->port_comm, current->comm, sizeof(pd->port_comm));
1615 ipath_stats.sps_ports++;
1616 ret = 0;
1617 } else
1618 ret = -EBUSY;
1619
1620bail:
1621 return ret;
1622}
1623
1624static inline int usable(struct ipath_devdata *dd)
1625{
1626 return dd &&
1627 (dd->ipath_flags & IPATH_PRESENT) &&
1628 dd->ipath_kregbase &&
1629 dd->ipath_lid &&
1630 !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED
1631 | IPATH_LINKUNK));
1632}
1633
1634static int find_free_port(int unit, struct file *fp,
1635 const struct ipath_user_info *uinfo)
1636{
1637 struct ipath_devdata *dd = ipath_lookup(unit);
1638 int ret, i;
1639
1640 if (!dd) {
1641 ret = -ENODEV;
1642 goto bail;
1643 }
1644
1645 if (!usable(dd)) {
1646 ret = -ENETDOWN;
1647 goto bail;
1648 }
1649
1650 for (i = 1; i < dd->ipath_cfgports; i++) {
1651 ret = try_alloc_port(dd, i, fp, uinfo);
1652 if (ret != -EBUSY)
1653 goto bail;
1654 }
1655 ret = -EBUSY;
1656
1657bail:
1658 return ret;
1659}
1660
1661static int find_best_unit(struct file *fp,
1662 const struct ipath_user_info *uinfo)
1663{
1664 int ret = 0, i, prefunit = -1, devmax;
1665 int maxofallports, npresent, nup;
1666 int ndev;
1667
1668 devmax = ipath_count_units(&npresent, &nup, &maxofallports);
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686 if (!cpus_empty(current->cpus_allowed) &&
1687 !cpus_full(current->cpus_allowed)) {
1688 int ncpus = num_online_cpus(), curcpu = -1, nset = 0;
1689 for (i = 0; i < ncpus; i++)
1690 if (cpu_isset(i, current->cpus_allowed)) {
1691 ipath_cdbg(PROC, "%s[%u] affinity set for "
1692 "cpu %d/%d\n", current->comm,
1693 current->pid, i, ncpus);
1694 curcpu = i;
1695 nset++;
1696 }
1697 if (curcpu != -1 && nset != ncpus) {
1698 if (npresent) {
1699 prefunit = curcpu / (ncpus / npresent);
1700 ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, "
1701 "%d cpus/chip, select unit %d\n",
1702 current->comm, current->pid,
1703 npresent, ncpus, ncpus / npresent,
1704 prefunit);
1705 }
1706 }
1707 }
1708
1709
1710
1711
1712
1713
1714 if (prefunit != -1)
1715 devmax = prefunit + 1;
1716recheck:
1717 for (i = 1; i < maxofallports; i++) {
1718 for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax;
1719 ndev++) {
1720 struct ipath_devdata *dd = ipath_lookup(ndev);
1721
1722 if (!usable(dd))
1723 continue;
1724 if (i >= dd->ipath_cfgports)
1725
1726
1727
1728
1729 continue;
1730 ret = try_alloc_port(dd, i, fp, uinfo);
1731 if (!ret)
1732 goto done;
1733 }
1734 }
1735
1736 if (npresent) {
1737 if (nup == 0) {
1738 ret = -ENETDOWN;
1739 ipath_dbg("No ports available (none initialized "
1740 "and ready)\n");
1741 } else {
1742 if (prefunit > 0) {
1743
1744 ipath_cdbg(PROC,
1745 "%s[%u] no ports on prefunit "
1746 "%d, clear and re-check\n",
1747 current->comm, current->pid,
1748 prefunit);
1749 devmax = ipath_count_units(NULL, NULL,
1750 NULL);
1751 prefunit = -1;
1752 goto recheck;
1753 }
1754 ret = -EBUSY;
1755 ipath_dbg("No ports available\n");
1756 }
1757 } else {
1758 ret = -ENXIO;
1759 ipath_dbg("No boards found\n");
1760 }
1761
1762done:
1763 return ret;
1764}
1765
1766static int find_shared_port(struct file *fp,
1767 const struct ipath_user_info *uinfo)
1768{
1769 int devmax, ndev, i;
1770 int ret = 0;
1771
1772 devmax = ipath_count_units(NULL, NULL, NULL);
1773
1774 for (ndev = 0; ndev < devmax; ndev++) {
1775 struct ipath_devdata *dd = ipath_lookup(ndev);
1776
1777 if (!usable(dd))
1778 continue;
1779 for (i = 1; i < dd->ipath_cfgports; i++) {
1780 struct ipath_portdata *pd = dd->ipath_pd[i];
1781
1782
1783 if (!pd || !pd->port_cnt)
1784 continue;
1785
1786 if (pd->port_subport_id != uinfo->spu_subport_id)
1787 continue;
1788
1789 if (pd->port_subport_cnt != uinfo->spu_subport_cnt ||
1790 pd->userversion != uinfo->spu_userversion ||
1791 pd->port_cnt >= pd->port_subport_cnt) {
1792 ret = -EINVAL;
1793 goto done;
1794 }
1795 port_fp(fp) = pd;
1796 subport_fp(fp) = pd->port_cnt++;
1797 pd->port_subpid[subport_fp(fp)] =
1798 get_pid(task_pid(current));
1799 tidcursor_fp(fp) = 0;
1800 pd->active_slaves |= 1 << subport_fp(fp);
1801 ipath_cdbg(PROC,
1802 "%s[%u] %u sharing %s[%u] unit:port %u:%u\n",
1803 current->comm, current->pid,
1804 subport_fp(fp),
1805 pd->port_comm, pid_nr(pd->port_pid),
1806 dd->ipath_unit, pd->port_port);
1807 ret = 1;
1808 goto done;
1809 }
1810 }
1811
1812done:
1813 return ret;
1814}
1815
1816static int ipath_open(struct inode *in, struct file *fp)
1817{
1818
1819 cycle_kernel_lock();
1820 fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL);
1821 return fp->private_data ? 0 : -ENOMEM;
1822}
1823
1824
1825static int ipath_assign_port(struct file *fp,
1826 const struct ipath_user_info *uinfo)
1827{
1828 int ret;
1829 int i_minor;
1830 unsigned swmajor, swminor;
1831
1832
1833 if (port_fp(fp)) {
1834 ret = -EINVAL;
1835 goto done;
1836 }
1837
1838
1839 swmajor = uinfo->spu_userversion >> 16;
1840 if (swmajor != IPATH_USER_SWMAJOR) {
1841 ipath_dbg("User major version %d not same as driver "
1842 "major %d\n", uinfo->spu_userversion >> 16,
1843 IPATH_USER_SWMAJOR);
1844 ret = -ENODEV;
1845 goto done;
1846 }
1847
1848 swminor = uinfo->spu_userversion & 0xffff;
1849 if (swminor != IPATH_USER_SWMINOR)
1850 ipath_dbg("User minor version %d not same as driver "
1851 "minor %d\n", swminor, IPATH_USER_SWMINOR);
1852
1853 mutex_lock(&ipath_mutex);
1854
1855 if (ipath_compatible_subports(swmajor, swminor) &&
1856 uinfo->spu_subport_cnt &&
1857 (ret = find_shared_port(fp, uinfo))) {
1858 if (ret > 0)
1859 ret = 0;
1860 goto done_chk_sdma;
1861 }
1862
1863 i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE;
1864 ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n",
1865 (long)fp->f_path.dentry->d_inode->i_rdev, i_minor);
1866
1867 if (i_minor)
1868 ret = find_free_port(i_minor - 1, fp, uinfo);
1869 else
1870 ret = find_best_unit(fp, uinfo);
1871
1872done_chk_sdma:
1873 if (!ret) {
1874 struct ipath_filedata *fd = fp->private_data;
1875 const struct ipath_portdata *pd = fd->pd;
1876 const struct ipath_devdata *dd = pd->port_dd;
1877
1878 fd->pq = ipath_user_sdma_queue_create(&dd->pcidev->dev,
1879 dd->ipath_unit,
1880 pd->port_port,
1881 fd->subport);
1882
1883 if (!fd->pq)
1884 ret = -ENOMEM;
1885 }
1886
1887 mutex_unlock(&ipath_mutex);
1888
1889done:
1890 return ret;
1891}
1892
1893
1894static int ipath_do_user_init(struct file *fp,
1895 const struct ipath_user_info *uinfo)
1896{
1897 int ret;
1898 struct ipath_portdata *pd = port_fp(fp);
1899 struct ipath_devdata *dd;
1900 u32 head32;
1901
1902
1903 if (subport_fp(fp)) {
1904 ret = wait_event_interruptible(pd->port_wait,
1905 !test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag));
1906 goto done;
1907 }
1908
1909 dd = pd->port_dd;
1910
1911 if (uinfo->spu_rcvhdrsize) {
1912 ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize);
1913 if (ret)
1914 goto done;
1915 }
1916
1917
1918
1919
1920 if (pd->port_port <= dd->ipath_ports_extrabuf)
1921 pd->port_piocnt = dd->ipath_pbufsport + 1;
1922 else
1923 pd->port_piocnt = dd->ipath_pbufsport;
1924
1925
1926 if (pd->port_port <= dd->ipath_ports_extrabuf)
1927 pd->port_pio_base = (dd->ipath_pbufsport + 1)
1928 * (pd->port_port - 1);
1929 else
1930 pd->port_pio_base = dd->ipath_ports_extrabuf +
1931 dd->ipath_pbufsport * (pd->port_port - 1);
1932 pd->port_piobufs = dd->ipath_piobufbase +
1933 pd->port_pio_base * dd->ipath_palign;
1934 ipath_cdbg(VERBOSE, "piobuf base for port %u is 0x%x, piocnt %u,"
1935 " first pio %u\n", pd->port_port, pd->port_piobufs,
1936 pd->port_piocnt, pd->port_pio_base);
1937 ipath_chg_pioavailkernel(dd, pd->port_pio_base, pd->port_piocnt, 0);
1938
1939
1940
1941
1942
1943
1944
1945 ret = ipath_create_rcvhdrq(dd, pd);
1946 if (!ret)
1947 ret = ipath_create_user_egr(pd);
1948 if (ret)
1949 goto done;
1950
1951
1952
1953
1954
1955
1956 head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port);
1957 ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port);
1958 pd->port_lastrcvhdrqtail = -1;
1959 ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n",
1960 pd->port_port, head32);
1961 pd->port_tidcursor = 0;
1962
1963
1964 pd->port_urgent = 0;
1965 pd->port_urgent_poll = 0;
1966 pd->port_hdrqfull_poll = pd->port_hdrqfull;
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979 set_bit(dd->ipath_r_portenable_shift + pd->port_port,
1980 &dd->ipath_rcvctrl);
1981 if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) {
1982 if (pd->port_rcvhdrtail_kvaddr)
1983 ipath_clear_rcvhdrtail(pd);
1984 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1985 dd->ipath_rcvctrl &
1986 ~(1ULL << dd->ipath_r_tailupd_shift));
1987 }
1988 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1989 dd->ipath_rcvctrl);
1990
1991 if (pd->port_subport_cnt) {
1992 clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag);
1993 wake_up(&pd->port_wait);
1994 }
1995done:
1996 return ret;
1997}
1998
1999
2000
2001
2002
2003
2004
2005
2006static void unlock_expected_tids(struct ipath_portdata *pd)
2007{
2008 struct ipath_devdata *dd = pd->port_dd;
2009 int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt;
2010 int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt;
2011
2012 ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n",
2013 pd->port_port);
2014 for (i = port_tidbase; i < maxtid; i++) {
2015 struct page *ps = dd->ipath_pageshadow[i];
2016
2017 if (!ps)
2018 continue;
2019
2020 dd->ipath_pageshadow[i] = NULL;
2021 pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i],
2022 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2023 ipath_release_user_pages_on_close(&ps, 1);
2024 cnt++;
2025 ipath_stats.sps_pageunlocks++;
2026 }
2027 if (cnt)
2028 ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n",
2029 pd->port_port, cnt);
2030
2031 if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks)
2032 ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n",
2033 (unsigned long long) ipath_stats.sps_pagelocks,
2034 (unsigned long long)
2035 ipath_stats.sps_pageunlocks);
2036}
2037
2038static int ipath_close(struct inode *in, struct file *fp)
2039{
2040 int ret = 0;
2041 struct ipath_filedata *fd;
2042 struct ipath_portdata *pd;
2043 struct ipath_devdata *dd;
2044 unsigned port;
2045
2046 ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n",
2047 (long)in->i_rdev, fp->private_data);
2048
2049 mutex_lock(&ipath_mutex);
2050
2051 fd = (struct ipath_filedata *) fp->private_data;
2052 fp->private_data = NULL;
2053 pd = fd->pd;
2054 if (!pd) {
2055 mutex_unlock(&ipath_mutex);
2056 goto bail;
2057 }
2058
2059 dd = pd->port_dd;
2060
2061
2062 ipath_user_sdma_queue_drain(dd, fd->pq);
2063 ipath_user_sdma_queue_destroy(fd->pq);
2064
2065 if (--pd->port_cnt) {
2066
2067
2068
2069
2070
2071 pd->active_slaves &= ~(1 << fd->subport);
2072 put_pid(pd->port_subpid[fd->subport]);
2073 pd->port_subpid[fd->subport] = NULL;
2074 mutex_unlock(&ipath_mutex);
2075 goto bail;
2076 }
2077 port = pd->port_port;
2078
2079 if (pd->port_hdrqfull) {
2080 ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors "
2081 "during run\n", pd->port_comm, pid_nr(pd->port_pid),
2082 pd->port_hdrqfull);
2083 pd->port_hdrqfull = 0;
2084 }
2085
2086 if (pd->port_rcvwait_to || pd->port_piowait_to
2087 || pd->port_rcvnowait || pd->port_pionowait) {
2088 ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; "
2089 "%u rcv %u, pio already\n",
2090 pd->port_port, pd->port_rcvwait_to,
2091 pd->port_piowait_to, pd->port_rcvnowait,
2092 pd->port_pionowait);
2093 pd->port_rcvwait_to = pd->port_piowait_to =
2094 pd->port_rcvnowait = pd->port_pionowait = 0;
2095 }
2096 if (pd->port_flag) {
2097 ipath_cdbg(PROC, "port %u port_flag set: 0x%lx\n",
2098 pd->port_port, pd->port_flag);
2099 pd->port_flag = 0;
2100 }
2101
2102 if (dd->ipath_kregbase) {
2103
2104 clear_bit(dd->ipath_r_portenable_shift + port,
2105 &dd->ipath_rcvctrl);
2106 clear_bit(pd->port_port + dd->ipath_r_intravail_shift,
2107 &dd->ipath_rcvctrl);
2108 ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl,
2109 dd->ipath_rcvctrl);
2110
2111
2112 (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
2113
2114
2115 ipath_clean_part_key(pd, dd);
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125 ipath_write_kreg_port(dd,
2126 dd->ipath_kregs->kr_rcvhdrtailaddr, port,
2127 dd->ipath_dummy_hdrq_phys);
2128 ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr,
2129 pd->port_port, dd->ipath_dummy_hdrq_phys);
2130
2131 ipath_disarm_piobufs(dd, pd->port_pio_base, pd->port_piocnt);
2132 ipath_chg_pioavailkernel(dd, pd->port_pio_base,
2133 pd->port_piocnt, 1);
2134
2135 dd->ipath_f_clear_tids(dd, pd->port_port);
2136
2137 if (dd->ipath_pageshadow)
2138 unlock_expected_tids(pd);
2139 ipath_stats.sps_ports--;
2140 ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n",
2141 pd->port_comm, pid_nr(pd->port_pid),
2142 dd->ipath_unit, port);
2143 }
2144
2145 put_pid(pd->port_pid);
2146 pd->port_pid = NULL;
2147 dd->ipath_pd[pd->port_port] = NULL;
2148 mutex_unlock(&ipath_mutex);
2149 ipath_free_pddata(dd, pd);
2150
2151bail:
2152 kfree(fd);
2153 return ret;
2154}
2155
2156static int ipath_port_info(struct ipath_portdata *pd, u16 subport,
2157 struct ipath_port_info __user *uinfo)
2158{
2159 struct ipath_port_info info;
2160 int nup;
2161 int ret;
2162 size_t sz;
2163
2164 (void) ipath_count_units(NULL, &nup, NULL);
2165 info.num_active = nup;
2166 info.unit = pd->port_dd->ipath_unit;
2167 info.port = pd->port_port;
2168 info.subport = subport;
2169
2170 if (ipath_supports_subports(pd->userversion >> 16,
2171 pd->userversion & 0xffff)) {
2172
2173 info.num_ports = pd->port_dd->ipath_cfgports - 1;
2174 info.num_subports = pd->port_subport_cnt;
2175 sz = sizeof(info);
2176 } else
2177 sz = sizeof(info) - 2 * sizeof(u16);
2178
2179 if (copy_to_user(uinfo, &info, sz)) {
2180 ret = -EFAULT;
2181 goto bail;
2182 }
2183 ret = 0;
2184
2185bail:
2186 return ret;
2187}
2188
2189static int ipath_get_slave_info(struct ipath_portdata *pd,
2190 void __user *slave_mask_addr)
2191{
2192 int ret = 0;
2193
2194 if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32)))
2195 ret = -EFAULT;
2196 return ret;
2197}
2198
2199static int ipath_sdma_get_inflight(struct ipath_user_sdma_queue *pq,
2200 u32 __user *inflightp)
2201{
2202 const u32 val = ipath_user_sdma_inflight_counter(pq);
2203
2204 if (put_user(val, inflightp))
2205 return -EFAULT;
2206
2207 return 0;
2208}
2209
2210static int ipath_sdma_get_complete(struct ipath_devdata *dd,
2211 struct ipath_user_sdma_queue *pq,
2212 u32 __user *completep)
2213{
2214 u32 val;
2215 int err;
2216
2217 err = ipath_user_sdma_make_progress(dd, pq);
2218 if (err < 0)
2219 return err;
2220
2221 val = ipath_user_sdma_complete_counter(pq);
2222 if (put_user(val, completep))
2223 return -EFAULT;
2224
2225 return 0;
2226}
2227
2228static ssize_t ipath_write(struct file *fp, const char __user *data,
2229 size_t count, loff_t *off)
2230{
2231 const struct ipath_cmd __user *ucmd;
2232 struct ipath_portdata *pd;
2233 const void __user *src;
2234 size_t consumed, copy;
2235 struct ipath_cmd cmd;
2236 ssize_t ret = 0;
2237 void *dest;
2238
2239 if (count < sizeof(cmd.type)) {
2240 ret = -EINVAL;
2241 goto bail;
2242 }
2243
2244 ucmd = (const struct ipath_cmd __user *) data;
2245
2246 if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) {
2247 ret = -EFAULT;
2248 goto bail;
2249 }
2250
2251 consumed = sizeof(cmd.type);
2252
2253 switch (cmd.type) {
2254 case IPATH_CMD_ASSIGN_PORT:
2255 case __IPATH_CMD_USER_INIT:
2256 case IPATH_CMD_USER_INIT:
2257 copy = sizeof(cmd.cmd.user_info);
2258 dest = &cmd.cmd.user_info;
2259 src = &ucmd->cmd.user_info;
2260 break;
2261 case IPATH_CMD_RECV_CTRL:
2262 copy = sizeof(cmd.cmd.recv_ctrl);
2263 dest = &cmd.cmd.recv_ctrl;
2264 src = &ucmd->cmd.recv_ctrl;
2265 break;
2266 case IPATH_CMD_PORT_INFO:
2267 copy = sizeof(cmd.cmd.port_info);
2268 dest = &cmd.cmd.port_info;
2269 src = &ucmd->cmd.port_info;
2270 break;
2271 case IPATH_CMD_TID_UPDATE:
2272 case IPATH_CMD_TID_FREE:
2273 copy = sizeof(cmd.cmd.tid_info);
2274 dest = &cmd.cmd.tid_info;
2275 src = &ucmd->cmd.tid_info;
2276 break;
2277 case IPATH_CMD_SET_PART_KEY:
2278 copy = sizeof(cmd.cmd.part_key);
2279 dest = &cmd.cmd.part_key;
2280 src = &ucmd->cmd.part_key;
2281 break;
2282 case __IPATH_CMD_SLAVE_INFO:
2283 copy = sizeof(cmd.cmd.slave_mask_addr);
2284 dest = &cmd.cmd.slave_mask_addr;
2285 src = &ucmd->cmd.slave_mask_addr;
2286 break;
2287 case IPATH_CMD_PIOAVAILUPD:
2288 copy = 0;
2289 src = NULL;
2290 dest = NULL;
2291 break;
2292 case IPATH_CMD_POLL_TYPE:
2293 copy = sizeof(cmd.cmd.poll_type);
2294 dest = &cmd.cmd.poll_type;
2295 src = &ucmd->cmd.poll_type;
2296 break;
2297 case IPATH_CMD_ARMLAUNCH_CTRL:
2298 copy = sizeof(cmd.cmd.armlaunch_ctrl);
2299 dest = &cmd.cmd.armlaunch_ctrl;
2300 src = &ucmd->cmd.armlaunch_ctrl;
2301 break;
2302 case IPATH_CMD_SDMA_INFLIGHT:
2303 copy = sizeof(cmd.cmd.sdma_inflight);
2304 dest = &cmd.cmd.sdma_inflight;
2305 src = &ucmd->cmd.sdma_inflight;
2306 break;
2307 case IPATH_CMD_SDMA_COMPLETE:
2308 copy = sizeof(cmd.cmd.sdma_complete);
2309 dest = &cmd.cmd.sdma_complete;
2310 src = &ucmd->cmd.sdma_complete;
2311 break;
2312 default:
2313 ret = -EINVAL;
2314 goto bail;
2315 }
2316
2317 if (copy) {
2318 if ((count - consumed) < copy) {
2319 ret = -EINVAL;
2320 goto bail;
2321 }
2322
2323 if (copy_from_user(dest, src, copy)) {
2324 ret = -EFAULT;
2325 goto bail;
2326 }
2327
2328 consumed += copy;
2329 }
2330
2331 pd = port_fp(fp);
2332 if (!pd && cmd.type != __IPATH_CMD_USER_INIT &&
2333 cmd.type != IPATH_CMD_ASSIGN_PORT) {
2334 ret = -EINVAL;
2335 goto bail;
2336 }
2337
2338 switch (cmd.type) {
2339 case IPATH_CMD_ASSIGN_PORT:
2340 ret = ipath_assign_port(fp, &cmd.cmd.user_info);
2341 if (ret)
2342 goto bail;
2343 break;
2344 case __IPATH_CMD_USER_INIT:
2345
2346 ret = ipath_assign_port(fp, &cmd.cmd.user_info);
2347 if (ret)
2348 goto bail;
2349
2350 case IPATH_CMD_USER_INIT:
2351 ret = ipath_do_user_init(fp, &cmd.cmd.user_info);
2352 if (ret)
2353 goto bail;
2354 ret = ipath_get_base_info(
2355 fp, (void __user *) (unsigned long)
2356 cmd.cmd.user_info.spu_base_info,
2357 cmd.cmd.user_info.spu_base_info_size);
2358 break;
2359 case IPATH_CMD_RECV_CTRL:
2360 ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl);
2361 break;
2362 case IPATH_CMD_PORT_INFO:
2363 ret = ipath_port_info(pd, subport_fp(fp),
2364 (struct ipath_port_info __user *)
2365 (unsigned long) cmd.cmd.port_info);
2366 break;
2367 case IPATH_CMD_TID_UPDATE:
2368 ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info);
2369 break;
2370 case IPATH_CMD_TID_FREE:
2371 ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info);
2372 break;
2373 case IPATH_CMD_SET_PART_KEY:
2374 ret = ipath_set_part_key(pd, cmd.cmd.part_key);
2375 break;
2376 case __IPATH_CMD_SLAVE_INFO:
2377 ret = ipath_get_slave_info(pd,
2378 (void __user *) (unsigned long)
2379 cmd.cmd.slave_mask_addr);
2380 break;
2381 case IPATH_CMD_PIOAVAILUPD:
2382 ipath_force_pio_avail_update(pd->port_dd);
2383 break;
2384 case IPATH_CMD_POLL_TYPE:
2385 pd->poll_type = cmd.cmd.poll_type;
2386 break;
2387 case IPATH_CMD_ARMLAUNCH_CTRL:
2388 if (cmd.cmd.armlaunch_ctrl)
2389 ipath_enable_armlaunch(pd->port_dd);
2390 else
2391 ipath_disable_armlaunch(pd->port_dd);
2392 break;
2393 case IPATH_CMD_SDMA_INFLIGHT:
2394 ret = ipath_sdma_get_inflight(user_sdma_queue_fp(fp),
2395 (u32 __user *) (unsigned long)
2396 cmd.cmd.sdma_inflight);
2397 break;
2398 case IPATH_CMD_SDMA_COMPLETE:
2399 ret = ipath_sdma_get_complete(pd->port_dd,
2400 user_sdma_queue_fp(fp),
2401 (u32 __user *) (unsigned long)
2402 cmd.cmd.sdma_complete);
2403 break;
2404 }
2405
2406 if (ret >= 0)
2407 ret = consumed;
2408
2409bail:
2410 return ret;
2411}
2412
2413static ssize_t ipath_writev(struct kiocb *iocb, const struct iovec *iov,
2414 unsigned long dim, loff_t off)
2415{
2416 struct file *filp = iocb->ki_filp;
2417 struct ipath_filedata *fp = filp->private_data;
2418 struct ipath_portdata *pd = port_fp(filp);
2419 struct ipath_user_sdma_queue *pq = fp->pq;
2420
2421 if (!dim)
2422 return -EINVAL;
2423
2424 return ipath_user_sdma_writev(pd->port_dd, pq, iov, dim);
2425}
2426
2427static struct class *ipath_class;
2428
2429static int init_cdev(int minor, char *name, const struct file_operations *fops,
2430 struct cdev **cdevp, struct device **devp)
2431{
2432 const dev_t dev = MKDEV(IPATH_MAJOR, minor);
2433 struct cdev *cdev = NULL;
2434 struct device *device = NULL;
2435 int ret;
2436
2437 cdev = cdev_alloc();
2438 if (!cdev) {
2439 printk(KERN_ERR IPATH_DRV_NAME
2440 ": Could not allocate cdev for minor %d, %s\n",
2441 minor, name);
2442 ret = -ENOMEM;
2443 goto done;
2444 }
2445
2446 cdev->owner = THIS_MODULE;
2447 cdev->ops = fops;
2448 kobject_set_name(&cdev->kobj, name);
2449
2450 ret = cdev_add(cdev, dev, 1);
2451 if (ret < 0) {
2452 printk(KERN_ERR IPATH_DRV_NAME
2453 ": Could not add cdev for minor %d, %s (err %d)\n",
2454 minor, name, -ret);
2455 goto err_cdev;
2456 }
2457
2458 device = device_create(ipath_class, NULL, dev, NULL, name);
2459
2460 if (IS_ERR(device)) {
2461 ret = PTR_ERR(device);
2462 printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
2463 "device for minor %d, %s (err %d)\n",
2464 minor, name, -ret);
2465 goto err_cdev;
2466 }
2467
2468 goto done;
2469
2470err_cdev:
2471 cdev_del(cdev);
2472 cdev = NULL;
2473
2474done:
2475 if (ret >= 0) {
2476 *cdevp = cdev;
2477 *devp = device;
2478 } else {
2479 *cdevp = NULL;
2480 *devp = NULL;
2481 }
2482
2483 return ret;
2484}
2485
2486int ipath_cdev_init(int minor, char *name, const struct file_operations *fops,
2487 struct cdev **cdevp, struct device **devp)
2488{
2489 return init_cdev(minor, name, fops, cdevp, devp);
2490}
2491
2492static void cleanup_cdev(struct cdev **cdevp,
2493 struct device **devp)
2494{
2495 struct device *dev = *devp;
2496
2497 if (dev) {
2498 device_unregister(dev);
2499 *devp = NULL;
2500 }
2501
2502 if (*cdevp) {
2503 cdev_del(*cdevp);
2504 *cdevp = NULL;
2505 }
2506}
2507
2508void ipath_cdev_cleanup(struct cdev **cdevp,
2509 struct device **devp)
2510{
2511 cleanup_cdev(cdevp, devp);
2512}
2513
2514static struct cdev *wildcard_cdev;
2515static struct device *wildcard_dev;
2516
2517static const dev_t dev = MKDEV(IPATH_MAJOR, 0);
2518
2519static int user_init(void)
2520{
2521 int ret;
2522
2523 ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME);
2524 if (ret < 0) {
2525 printk(KERN_ERR IPATH_DRV_NAME ": Could not register "
2526 "chrdev region (err %d)\n", -ret);
2527 goto done;
2528 }
2529
2530 ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME);
2531
2532 if (IS_ERR(ipath_class)) {
2533 ret = PTR_ERR(ipath_class);
2534 printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
2535 "device class (err %d)\n", -ret);
2536 goto bail;
2537 }
2538
2539 goto done;
2540bail:
2541 unregister_chrdev_region(dev, IPATH_NMINORS);
2542done:
2543 return ret;
2544}
2545
2546static void user_cleanup(void)
2547{
2548 if (ipath_class) {
2549 class_destroy(ipath_class);
2550 ipath_class = NULL;
2551 }
2552
2553 unregister_chrdev_region(dev, IPATH_NMINORS);
2554}
2555
2556static atomic_t user_count = ATOMIC_INIT(0);
2557static atomic_t user_setup = ATOMIC_INIT(0);
2558
2559int ipath_user_add(struct ipath_devdata *dd)
2560{
2561 char name[10];
2562 int ret;
2563
2564 if (atomic_inc_return(&user_count) == 1) {
2565 ret = user_init();
2566 if (ret < 0) {
2567 ipath_dev_err(dd, "Unable to set up user support: "
2568 "error %d\n", -ret);
2569 goto bail;
2570 }
2571 ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev,
2572 &wildcard_dev);
2573 if (ret < 0) {
2574 ipath_dev_err(dd, "Could not create wildcard "
2575 "minor: error %d\n", -ret);
2576 goto bail_user;
2577 }
2578
2579 atomic_set(&user_setup, 1);
2580 }
2581
2582 snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit);
2583
2584 ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops,
2585 &dd->user_cdev, &dd->user_dev);
2586 if (ret < 0)
2587 ipath_dev_err(dd, "Could not create user minor %d, %s\n",
2588 dd->ipath_unit + 1, name);
2589
2590 goto bail;
2591
2592bail_user:
2593 user_cleanup();
2594bail:
2595 return ret;
2596}
2597
2598void ipath_user_remove(struct ipath_devdata *dd)
2599{
2600 cleanup_cdev(&dd->user_cdev, &dd->user_dev);
2601
2602 if (atomic_dec_return(&user_count) == 0) {
2603 if (atomic_read(&user_setup) == 0)
2604 goto bail;
2605
2606 cleanup_cdev(&wildcard_cdev, &wildcard_dev);
2607 user_cleanup();
2608
2609 atomic_set(&user_setup, 0);
2610 }
2611bail:
2612 return;
2613}