2 * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
3 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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 <asm/pgtable.h>
41 #include "ipath_kernel.h"
42 #include "ipath_common.h"
44 static int ipath_open(struct inode *, struct file *);
45 static int ipath_close(struct inode *, struct file *);
46 static ssize_t ipath_write(struct file *, const char __user *, size_t,
48 static unsigned int ipath_poll(struct file *, struct poll_table_struct *);
49 static int ipath_mmap(struct file *, struct vm_area_struct *);
51 static const struct file_operations ipath_file_ops = {
55 .release = ipath_close,
61 * Convert kernel virtual addresses to physical addresses so they don't
62 * potentially conflict with the chip addresses used as mmap offsets.
63 * It doesn't really matter what mmap offset we use as long as we can
64 * interpret it correctly.
66 static u64 cvt_kvaddr(void *p)
71 page = vmalloc_to_page(p);
73 paddr = page_to_pfn(page) << PAGE_SHIFT;
78 static int ipath_get_base_info(struct file *fp,
79 void __user *ubase, size_t ubase_size)
81 struct ipath_portdata *pd = port_fp(fp);
83 struct ipath_base_info *kinfo = NULL;
84 struct ipath_devdata *dd = pd->port_dd;
89 subport_cnt = pd->port_subport_cnt;
96 master = !subport_fp(fp);
100 /* If port sharing is not requested, allow the old size structure */
102 sz -= 7 * sizeof(u64);
103 if (ubase_size < sz) {
105 "Base size %zu, need %zu (version mismatch?)\n",
111 kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL);
117 ret = dd->ipath_f_get_base_info(pd, kinfo);
121 kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt;
122 kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize;
123 kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt;
124 kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize;
126 * have to mmap whole thing
128 kinfo->spi_rcv_egrbuftotlen =
129 pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
130 kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk;
131 kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen /
132 pd->port_rcvegrbuf_chunks;
133 kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt;
135 kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt;
137 * for this use, may be ipath_cfgports summed over all chips that
138 * are are configured and present
140 kinfo->spi_nports = dd->ipath_cfgports;
141 /* unit (chip/board) our port is on */
142 kinfo->spi_unit = dd->ipath_unit;
143 /* for now, only a single page */
144 kinfo->spi_tid_maxsize = PAGE_SIZE;
147 * Doing this per port, and based on the skip value, etc. This has
148 * to be the actual buffer size, since the protocol code treats it
151 * These have to be set to user addresses in the user code via mmap.
152 * These values are used on return to user code for the mmap target
153 * addresses only. For 32 bit, same 44 bit address problem, so use
154 * the physical address, not virtual. Before 2.6.11, using the
155 * page_address() macro worked, but in 2.6.11, even that returns the
156 * full 64 bit address (upper bits all 1's). So far, using the
157 * physical addresses (or chip offsets, for chip mapping) works, but
158 * no doubt some future kernel release will change that, and we'll be
159 * on to yet another method of dealing with this.
161 kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys;
162 kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys;
163 kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys;
164 kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys;
165 kinfo->spi_status = (u64) kinfo->spi_pioavailaddr +
166 (void *) dd->ipath_statusp -
167 (void *) dd->ipath_pioavailregs_dma;
169 kinfo->spi_piocnt = dd->ipath_pbufsport;
170 kinfo->spi_piobufbase = (u64) pd->port_piobufs;
171 kinfo->__spi_uregbase = (u64) dd->ipath_uregbase +
172 dd->ipath_ureg_align * pd->port_port;
174 kinfo->spi_piocnt = (dd->ipath_pbufsport / subport_cnt) +
175 (dd->ipath_pbufsport % subport_cnt);
176 /* Master's PIO buffers are after all the slave's */
177 kinfo->spi_piobufbase = (u64) pd->port_piobufs +
179 (dd->ipath_pbufsport - kinfo->spi_piocnt);
181 unsigned slave = subport_fp(fp) - 1;
183 kinfo->spi_piocnt = dd->ipath_pbufsport / subport_cnt;
184 kinfo->spi_piobufbase = (u64) pd->port_piobufs +
185 dd->ipath_palign * kinfo->spi_piocnt * slave;
189 * Set the PIO avail update threshold to no larger
190 * than the number of buffers per process. Note that
191 * we decrease it here, but won't ever increase it.
193 if (dd->ipath_pioupd_thresh &&
194 kinfo->spi_piocnt < dd->ipath_pioupd_thresh) {
197 dd->ipath_pioupd_thresh = kinfo->spi_piocnt;
198 ipath_dbg("Decreased pio update threshold to %u\n",
199 dd->ipath_pioupd_thresh);
200 spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags);
201 dd->ipath_sendctrl &= ~(INFINIPATH_S_UPDTHRESH_MASK
202 << INFINIPATH_S_UPDTHRESH_SHIFT);
203 dd->ipath_sendctrl |= dd->ipath_pioupd_thresh
204 << INFINIPATH_S_UPDTHRESH_SHIFT;
205 ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
207 spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags);
211 kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase +
212 dd->ipath_ureg_align * pd->port_port;
213 kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs;
214 kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base;
215 kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr;
217 kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase +
218 PAGE_SIZE * subport_fp(fp));
220 kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base +
221 pd->port_rcvhdrq_size * subport_fp(fp));
222 kinfo->spi_rcvhdr_tailaddr = 0;
223 kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf +
224 pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size *
227 kinfo->spi_subport_uregbase =
228 cvt_kvaddr(pd->subport_uregbase);
229 kinfo->spi_subport_rcvegrbuf =
230 cvt_kvaddr(pd->subport_rcvegrbuf);
231 kinfo->spi_subport_rcvhdr_base =
232 cvt_kvaddr(pd->subport_rcvhdr_base);
233 ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n",
234 kinfo->spi_port, kinfo->spi_runtime_flags,
235 (unsigned long long) kinfo->spi_subport_uregbase,
236 (unsigned long long) kinfo->spi_subport_rcvegrbuf,
237 (unsigned long long) kinfo->spi_subport_rcvhdr_base);
240 kinfo->spi_pioindex = (kinfo->spi_piobufbase - dd->ipath_piobufbase) /
242 kinfo->spi_pioalign = dd->ipath_palign;
244 kinfo->spi_qpair = IPATH_KD_QP;
246 * user mode PIO buffers are always 2KB, even when 4KB can
247 * be received, and sent via the kernel; this is ibmaxlen
250 kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32);
251 kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */
252 kinfo->spi_port = pd->port_port;
253 kinfo->spi_subport = subport_fp(fp);
254 kinfo->spi_sw_version = IPATH_KERN_SWVERSION;
255 kinfo->spi_hw_version = dd->ipath_revision;
258 kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER;
261 sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo);
262 if (copy_to_user(ubase, kinfo, sz))
271 * ipath_tid_update - update a port TID
273 * @fp: the ipath device file
274 * @ti: the TID information
276 * The new implementation as of Oct 2004 is that the driver assigns
277 * the tid and returns it to the caller. To make it easier to
278 * catch bugs, and to reduce search time, we keep a cursor for
279 * each port, walking the shadow tid array to find one that's not
282 * For now, if we can't allocate the full list, we fail, although
283 * in the long run, we'll allocate as many as we can, and the
284 * caller will deal with that by trying the remaining pages later.
285 * That means that when we fail, we have to mark the tids as not in
286 * use again, in our shadow copy.
288 * It's up to the caller to free the tids when they are done.
289 * We'll unlock the pages as they free them.
291 * Also, right now we are locking one page at a time, but since
292 * the intended use of this routine is for a single group of
293 * virtually contiguous pages, that should change to improve
296 static int ipath_tid_update(struct ipath_portdata *pd, struct file *fp,
297 const struct ipath_tid_info *ti)
300 u32 tid, porttid, cnt, i, tidcnt, tidoff;
302 struct ipath_devdata *dd = pd->port_dd;
305 u64 __iomem *tidbase;
306 unsigned long tidmap[8];
307 struct page **pagep = NULL;
308 unsigned subport = subport_fp(fp);
310 if (!dd->ipath_pageshadow) {
317 ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n",
318 (unsigned long long) ti->tidlist);
320 * Should we treat as success? likely a bug
325 porttid = pd->port_port * dd->ipath_rcvtidcnt;
326 if (!pd->port_subport_cnt) {
327 tidcnt = dd->ipath_rcvtidcnt;
328 tid = pd->port_tidcursor;
330 } else if (!subport) {
331 tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) +
332 (dd->ipath_rcvtidcnt % pd->port_subport_cnt);
333 tidoff = dd->ipath_rcvtidcnt - tidcnt;
335 tid = tidcursor_fp(fp);
337 tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt;
338 tidoff = tidcnt * (subport - 1);
340 tid = tidcursor_fp(fp);
343 /* make sure it all fits in port_tid_pg_list */
344 dev_info(&dd->pcidev->dev, "Process tried to allocate %u "
345 "TIDs, only trying max (%u)\n", cnt, tidcnt);
348 pagep = &((struct page **) pd->port_tid_pg_list)[tidoff];
349 tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff];
351 memset(tidmap, 0, sizeof(tidmap));
352 /* before decrement; chip actual # */
354 tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) +
355 dd->ipath_rcvtidbase +
356 porttid * sizeof(*tidbase));
358 ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n",
359 pd->port_port, cnt, tid, tidbase);
361 /* virtual address of first page in transfer */
362 vaddr = ti->tidvaddr;
363 if (!access_ok(VERIFY_WRITE, (void __user *) vaddr,
365 ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n",
370 ret = ipath_get_user_pages(vaddr, cnt, pagep);
373 ipath_dbg("Failed to lock addr %p, %u pages "
374 "(already locked)\n",
375 (void *) vaddr, cnt);
377 * for now, continue, and see what happens but with
378 * the new implementation, this should never happen,
379 * unless perhaps the user has mpin'ed the pages
380 * themselves (something we need to test)
384 dev_info(&dd->pcidev->dev,
385 "Failed to lock addr %p, %u pages: "
386 "errno %d\n", (void *) vaddr, cnt, -ret);
390 for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) {
391 for (; ntids--; tid++) {
394 if (!dd->ipath_pageshadow[porttid + tid])
399 * oops, wrapped all the way through their TIDs,
400 * and didn't have enough free; see comments at
403 ipath_dbg("Not enough free TIDs for %u pages "
404 "(index %d), failing\n", cnt, i);
405 i--; /* last tidlist[i] not filled in */
409 tidlist[i] = tid + tidoff;
410 ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, "
411 "vaddr %lx\n", i, tid + tidoff, vaddr);
412 /* we "know" system pages and TID pages are same size */
413 dd->ipath_pageshadow[porttid + tid] = pagep[i];
414 dd->ipath_physshadow[porttid + tid] = ipath_map_page(
415 dd->pcidev, pagep[i], 0, PAGE_SIZE,
418 * don't need atomic or it's overhead
420 __set_bit(tid, tidmap);
421 physaddr = dd->ipath_physshadow[porttid + tid];
422 ipath_stats.sps_pagelocks++;
424 "TID %u, vaddr %lx, physaddr %llx pgp %p\n",
425 tid, vaddr, (unsigned long long) physaddr,
427 dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED,
430 * don't check this tid in ipath_portshadow, since we
431 * just filled it in; start with the next one.
439 /* jump here if copy out of updated info failed... */
440 ipath_dbg("After failure (ret=%d), undo %d of %d entries\n",
442 /* same code that's in ipath_free_tid() */
443 limit = sizeof(tidmap) * BITS_PER_BYTE;
445 /* just in case size changes in future */
447 tid = find_first_bit((const unsigned long *)tidmap, limit);
448 for (; tid < limit; tid++) {
449 if (!test_bit(tid, tidmap))
451 if (dd->ipath_pageshadow[porttid + tid]) {
452 ipath_cdbg(VERBOSE, "Freeing TID %u\n",
454 dd->ipath_f_put_tid(dd, &tidbase[tid],
455 RCVHQ_RCV_TYPE_EXPECTED,
456 dd->ipath_tidinvalid);
457 pci_unmap_page(dd->pcidev,
458 dd->ipath_physshadow[porttid + tid],
459 PAGE_SIZE, PCI_DMA_FROMDEVICE);
460 dd->ipath_pageshadow[porttid + tid] = NULL;
461 ipath_stats.sps_pageunlocks++;
464 ipath_release_user_pages(pagep, cnt);
467 * Copy the updated array, with ipath_tid's filled in, back
468 * to user. Since we did the copy in already, this "should
469 * never fail" If it does, we have to clean up...
471 if (copy_to_user((void __user *)
472 (unsigned long) ti->tidlist,
473 tidlist, cnt * sizeof(*tidlist))) {
477 if (copy_to_user((void __user *) (unsigned long) ti->tidmap,
478 tidmap, sizeof tidmap)) {
484 if (!pd->port_subport_cnt)
485 pd->port_tidcursor = tid;
487 tidcursor_fp(fp) = tid;
492 ipath_dbg("Failed to map %u TID pages, failing with %d\n",
498 * ipath_tid_free - free a port TID
500 * @subport: the subport
503 * right now we are unlocking one page at a time, but since
504 * the intended use of this routine is for a single group of
505 * virtually contiguous pages, that should change to improve
506 * performance. We check that the TID is in range for this port
507 * but otherwise don't check validity; if user has an error and
508 * frees the wrong tid, it's only their own data that can thereby
509 * be corrupted. We do check that the TID was in use, for sanity
510 * We always use our idea of the saved address, not the address that
511 * they pass in to us.
514 static int ipath_tid_free(struct ipath_portdata *pd, unsigned subport,
515 const struct ipath_tid_info *ti)
518 u32 tid, porttid, cnt, limit, tidcnt;
519 struct ipath_devdata *dd = pd->port_dd;
520 u64 __iomem *tidbase;
521 unsigned long tidmap[8];
523 if (!dd->ipath_pageshadow) {
528 if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap,
534 porttid = pd->port_port * dd->ipath_rcvtidcnt;
535 if (!pd->port_subport_cnt)
536 tidcnt = dd->ipath_rcvtidcnt;
538 tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) +
539 (dd->ipath_rcvtidcnt % pd->port_subport_cnt);
540 porttid += dd->ipath_rcvtidcnt - tidcnt;
542 tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt;
543 porttid += tidcnt * (subport - 1);
545 tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) +
546 dd->ipath_rcvtidbase +
547 porttid * sizeof(*tidbase));
549 limit = sizeof(tidmap) * BITS_PER_BYTE;
551 /* just in case size changes in future */
553 tid = find_first_bit(tidmap, limit);
554 ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) "
555 "set is %d, porttid %u\n", pd->port_port, ti->tidcnt,
556 limit, tid, porttid);
557 for (cnt = 0; tid < limit; tid++) {
559 * small optimization; if we detect a run of 3 or so without
560 * any set, use find_first_bit again. That's mainly to
561 * accelerate the case where we wrapped, so we have some at
562 * the beginning, and some at the end, and a big gap
565 if (!test_bit(tid, tidmap))
568 if (dd->ipath_pageshadow[porttid + tid]) {
570 p = dd->ipath_pageshadow[porttid + tid];
571 dd->ipath_pageshadow[porttid + tid] = NULL;
572 ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n",
574 dd->ipath_f_put_tid(dd, &tidbase[tid],
575 RCVHQ_RCV_TYPE_EXPECTED,
576 dd->ipath_tidinvalid);
577 pci_unmap_page(dd->pcidev,
578 dd->ipath_physshadow[porttid + tid],
579 PAGE_SIZE, PCI_DMA_FROMDEVICE);
580 ipath_release_user_pages(&p, 1);
581 ipath_stats.sps_pageunlocks++;
583 ipath_dbg("Unused tid %u, ignoring\n", tid);
585 if (cnt != ti->tidcnt)
586 ipath_dbg("passed in tidcnt %d, only %d bits set in map\n",
590 ipath_dbg("Failed to unmap %u TID pages, failing with %d\n",
596 * ipath_set_part_key - set a partition key
600 * We can have up to 4 active at a time (other than the default, which is
601 * always allowed). This is somewhat tricky, since multiple ports may set
602 * the same key, so we reference count them, and clean up at exit. All 4
603 * partition keys are packed into a single infinipath register. It's an
604 * error for a process to set the same pkey multiple times. We provide no
605 * mechanism to de-allocate a pkey at this time, we may eventually need to
606 * do that. I've used the atomic operations, and no locking, and only make
607 * a single pass through what's available. This should be more than
608 * adequate for some time. I'll think about spinlocks or the like if and as
611 static int ipath_set_part_key(struct ipath_portdata *pd, u16 key)
613 struct ipath_devdata *dd = pd->port_dd;
614 int i, any = 0, pidx = -1;
615 u16 lkey = key & 0x7FFF;
618 if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) {
619 /* nothing to do; this key always valid */
624 ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys "
625 "%hx:%x %hx:%x %hx:%x %hx:%x\n",
626 pd->port_port, key, dd->ipath_pkeys[0],
627 atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1],
628 atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2],
629 atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3],
630 atomic_read(&dd->ipath_pkeyrefs[3]));
633 ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n",
640 * Set the full membership bit, because it has to be
641 * set in the register or the packet, and it seems
642 * cleaner to set in the register than to force all
643 * callers to set it. (see bug 4331)
647 for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
648 if (!pd->port_pkeys[i] && pidx == -1)
650 if (pd->port_pkeys[i] == key) {
651 ipath_cdbg(VERBOSE, "p%u tries to set same pkey "
652 "(%x) more than once\n",
659 ipath_dbg("All pkeys for port %u already in use, "
660 "can't set %x\n", pd->port_port, key);
664 for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
665 if (!dd->ipath_pkeys[i]) {
669 if (dd->ipath_pkeys[i] == key) {
670 atomic_t *pkrefs = &dd->ipath_pkeyrefs[i];
672 if (atomic_inc_return(pkrefs) > 1) {
673 pd->port_pkeys[pidx] = key;
674 ipath_cdbg(VERBOSE, "p%u set key %x "
675 "matches #%d, count now %d\n",
676 pd->port_port, key, i,
677 atomic_read(pkrefs));
682 * lost race, decrement count, catch below
685 ipath_cdbg(VERBOSE, "Lost race, count was "
686 "0, after dec, it's %d\n",
687 atomic_read(pkrefs));
691 if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) {
693 * It makes no sense to have both the limited and
694 * full membership PKEY set at the same time since
695 * the unlimited one will disable the limited one.
702 ipath_dbg("port %u, all pkeys already in use, "
703 "can't set %x\n", pd->port_port, key);
707 for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) {
708 if (!dd->ipath_pkeys[i] &&
709 atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) {
712 /* for ipathstats, etc. */
713 ipath_stats.sps_pkeys[i] = lkey;
714 pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key;
716 (u64) dd->ipath_pkeys[0] |
717 ((u64) dd->ipath_pkeys[1] << 16) |
718 ((u64) dd->ipath_pkeys[2] << 32) |
719 ((u64) dd->ipath_pkeys[3] << 48);
720 ipath_cdbg(PROC, "p%u set key %x in #%d, "
721 "portidx %d, new pkey reg %llx\n",
722 pd->port_port, key, i, pidx,
723 (unsigned long long) pkey);
725 dd, dd->ipath_kregs->kr_partitionkey, pkey);
731 ipath_dbg("port %u, all pkeys already in use 2nd pass, "
732 "can't set %x\n", pd->port_port, key);
740 * ipath_manage_rcvq - manage a port's receive queue
742 * @subport: the subport
743 * @start_stop: action to carry out
745 * start_stop == 0 disables receive on the port, for use in queue
746 * overflow conditions. start_stop==1 re-enables, to be used to
747 * re-init the software copy of the head register
749 static int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport,
752 struct ipath_devdata *dd = pd->port_dd;
754 ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n",
755 start_stop ? "en" : "dis", dd->ipath_unit,
756 pd->port_port, subport);
759 /* atomically clear receive enable port. */
762 * On enable, force in-memory copy of the tail register to
763 * 0, so that protocol code doesn't have to worry about
764 * whether or not the chip has yet updated the in-memory
765 * copy or not on return from the system call. The chip
766 * always resets it's tail register back to 0 on a
767 * transition from disabled to enabled. This could cause a
768 * problem if software was broken, and did the enable w/o
769 * the disable, but eventually the in-memory copy will be
770 * updated and correct itself, even in the face of software
773 if (pd->port_rcvhdrtail_kvaddr)
774 ipath_clear_rcvhdrtail(pd);
775 set_bit(dd->ipath_r_portenable_shift + pd->port_port,
778 clear_bit(dd->ipath_r_portenable_shift + pd->port_port,
780 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
782 /* now be sure chip saw it before we return */
783 ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
786 * And try to be sure that tail reg update has happened too.
787 * This should in theory interlock with the RXE changes to
788 * the tail register. Don't assign it to the tail register
789 * in memory copy, since we could overwrite an update by the
792 ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
794 /* always; new head should be equal to new tail; see above */
799 static void ipath_clean_part_key(struct ipath_portdata *pd,
800 struct ipath_devdata *dd)
802 int i, j, pchanged = 0;
805 /* for debugging only */
806 oldpkey = (u64) dd->ipath_pkeys[0] |
807 ((u64) dd->ipath_pkeys[1] << 16) |
808 ((u64) dd->ipath_pkeys[2] << 32) |
809 ((u64) dd->ipath_pkeys[3] << 48);
811 for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) {
812 if (!pd->port_pkeys[i])
814 ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i,
816 for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) {
817 /* check for match independent of the global bit */
818 if ((dd->ipath_pkeys[j] & 0x7fff) !=
819 (pd->port_pkeys[i] & 0x7fff))
821 if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) {
822 ipath_cdbg(VERBOSE, "p%u clear key "
825 pd->port_pkeys[i], j);
826 ipath_stats.sps_pkeys[j] =
827 dd->ipath_pkeys[j] = 0;
831 VERBOSE, "p%u key %x matches #%d, "
832 "but ref still %d\n", pd->port_port,
833 pd->port_pkeys[i], j,
834 atomic_read(&dd->ipath_pkeyrefs[j]));
837 pd->port_pkeys[i] = 0;
840 u64 pkey = (u64) dd->ipath_pkeys[0] |
841 ((u64) dd->ipath_pkeys[1] << 16) |
842 ((u64) dd->ipath_pkeys[2] << 32) |
843 ((u64) dd->ipath_pkeys[3] << 48);
844 ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, "
845 "new pkey reg %llx\n", pd->port_port,
846 (unsigned long long) oldpkey,
847 (unsigned long long) pkey);
848 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
854 * Initialize the port data with the receive buffer sizes
855 * so this can be done while the master port is locked.
856 * Otherwise, there is a race with a slave opening the port
857 * and seeing these fields uninitialized.
859 static void init_user_egr_sizes(struct ipath_portdata *pd)
861 struct ipath_devdata *dd = pd->port_dd;
862 unsigned egrperchunk, egrcnt, size;
865 * to avoid wasting a lot of memory, we allocate 32KB chunks of
866 * physically contiguous memory, advance through it until used up
867 * and then allocate more. Of course, we need memory to store those
868 * extra pointers, now. Started out with 256KB, but under heavy
869 * memory pressure (creating large files and then copying them over
870 * NFS while doing lots of MPI jobs), we hit some allocation
871 * failures, even though we can sleep... (2.6.10) Still get
872 * failures at 64K. 32K is the lowest we can go without wasting
876 egrperchunk = size / dd->ipath_rcvegrbufsize;
877 egrcnt = dd->ipath_rcvegrcnt;
878 pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk;
879 pd->port_rcvegrbufs_perchunk = egrperchunk;
880 pd->port_rcvegrbuf_size = size;
884 * ipath_create_user_egr - allocate eager TID buffers
885 * @pd: the port to allocate TID buffers for
887 * This routine is now quite different for user and kernel, because
888 * the kernel uses skb's, for the accelerated network performance
889 * This is the user port version
891 * Allocate the eager TID buffers and program them into infinipath
892 * They are no longer completely contiguous, we do multiple allocation
895 static int ipath_create_user_egr(struct ipath_portdata *pd)
897 struct ipath_devdata *dd = pd->port_dd;
898 unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff;
904 * GFP_USER, but without GFP_FS, so buffer cache can be
905 * coalesced (we hope); otherwise, even at order 4,
906 * heavy filesystem activity makes these fail, and we can
907 * use compound pages.
909 gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP;
911 egrcnt = dd->ipath_rcvegrcnt;
912 /* TID number offset for this port */
913 egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt;
914 egrsize = dd->ipath_rcvegrbufsize;
915 ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid "
916 "offset %x, egrsize %u\n", egrcnt, egroff, egrsize);
918 chunk = pd->port_rcvegrbuf_chunks;
919 egrperchunk = pd->port_rcvegrbufs_perchunk;
920 size = pd->port_rcvegrbuf_size;
921 pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]),
923 if (!pd->port_rcvegrbuf) {
927 pd->port_rcvegrbuf_phys =
928 kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]),
930 if (!pd->port_rcvegrbuf_phys) {
934 for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) {
936 pd->port_rcvegrbuf[e] = dma_alloc_coherent(
937 &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e],
940 if (!pd->port_rcvegrbuf[e]) {
942 goto bail_rcvegrbuf_phys;
946 pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0];
948 for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) {
949 dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk];
952 for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
953 dd->ipath_f_put_tid(dd, e + egroff +
957 dd->ipath_rcvegrbase),
958 RCVHQ_RCV_TYPE_EAGER, pa);
961 cond_resched(); /* don't hog the cpu */
968 for (e = 0; e < pd->port_rcvegrbuf_chunks &&
969 pd->port_rcvegrbuf[e]; e++) {
970 dma_free_coherent(&dd->pcidev->dev, size,
971 pd->port_rcvegrbuf[e],
972 pd->port_rcvegrbuf_phys[e]);
975 kfree(pd->port_rcvegrbuf_phys);
976 pd->port_rcvegrbuf_phys = NULL;
978 kfree(pd->port_rcvegrbuf);
979 pd->port_rcvegrbuf = NULL;
985 /* common code for the mappings on dma_alloc_coherent mem */
986 static int ipath_mmap_mem(struct vm_area_struct *vma,
987 struct ipath_portdata *pd, unsigned len, int write_ok,
988 void *kvaddr, char *what)
990 struct ipath_devdata *dd = pd->port_dd;
994 if ((vma->vm_end - vma->vm_start) > len) {
995 dev_info(&dd->pcidev->dev,
996 "FAIL on %s: len %lx > %x\n", what,
997 vma->vm_end - vma->vm_start, len);
1003 if (vma->vm_flags & VM_WRITE) {
1004 dev_info(&dd->pcidev->dev,
1005 "%s must be mapped readonly\n", what);
1010 /* don't allow them to later change with mprotect */
1011 vma->vm_flags &= ~VM_MAYWRITE;
1014 pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT;
1015 ret = remap_pfn_range(vma, vma->vm_start, pfn,
1016 len, vma->vm_page_prot);
1018 dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x "
1019 "bytes r%c failed: %d\n", what, pd->port_port,
1020 pfn, len, write_ok?'w':'o', ret);
1022 ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes "
1023 "r%c\n", what, pd->port_port, pfn, len,
1029 static int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd,
1036 * This is real hardware, so use io_remap. This is the mechanism
1037 * for the user process to update the head registers for their port
1040 if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) {
1041 dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen "
1042 "%lx > PAGE\n", vma->vm_end - vma->vm_start);
1045 phys = dd->ipath_physaddr + ureg;
1046 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1048 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
1049 ret = io_remap_pfn_range(vma, vma->vm_start,
1051 vma->vm_end - vma->vm_start,
1057 static int mmap_piobufs(struct vm_area_struct *vma,
1058 struct ipath_devdata *dd,
1059 struct ipath_portdata *pd,
1060 unsigned piobufs, unsigned piocnt)
1066 * When we map the PIO buffers in the chip, we want to map them as
1067 * writeonly, no read possible. This prevents access to previous
1068 * process data, and catches users who might try to read the i/o
1069 * space due to a bug.
1071 if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) {
1072 dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: "
1073 "reqlen %lx > PAGE\n",
1074 vma->vm_end - vma->vm_start);
1079 phys = dd->ipath_physaddr + piobufs;
1081 #if defined(__powerpc__)
1082 /* There isn't a generic way to specify writethrough mappings */
1083 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1084 pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU;
1085 pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED;
1089 * don't allow them to later change to readable with mprotect (for when
1090 * not initially mapped readable, as is normally the case)
1092 vma->vm_flags &= ~VM_MAYREAD;
1093 vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
1095 ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT,
1096 vma->vm_end - vma->vm_start,
1102 static int mmap_rcvegrbufs(struct vm_area_struct *vma,
1103 struct ipath_portdata *pd)
1105 struct ipath_devdata *dd = pd->port_dd;
1106 unsigned long start, size;
1107 size_t total_size, i;
1111 size = pd->port_rcvegrbuf_size;
1112 total_size = pd->port_rcvegrbuf_chunks * size;
1113 if ((vma->vm_end - vma->vm_start) > total_size) {
1114 dev_info(&dd->pcidev->dev, "FAIL on egr bufs: "
1115 "reqlen %lx > actual %lx\n",
1116 vma->vm_end - vma->vm_start,
1117 (unsigned long) total_size);
1122 if (vma->vm_flags & VM_WRITE) {
1123 dev_info(&dd->pcidev->dev, "Can't map eager buffers as "
1124 "writable (flags=%lx)\n", vma->vm_flags);
1128 /* don't allow them to later change to writeable with mprotect */
1129 vma->vm_flags &= ~VM_MAYWRITE;
1131 start = vma->vm_start;
1133 for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) {
1134 pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT;
1135 ret = remap_pfn_range(vma, start, pfn, size,
1147 * ipath_file_vma_fault - handle a VMA page fault.
1149 static int ipath_file_vma_fault(struct vm_area_struct *vma,
1150 struct vm_fault *vmf)
1154 page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT));
1156 return VM_FAULT_SIGBUS;
1163 static struct vm_operations_struct ipath_file_vm_ops = {
1164 .fault = ipath_file_vma_fault,
1167 static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr,
1168 struct ipath_portdata *pd, unsigned subport)
1171 struct ipath_devdata *dd;
1176 /* If the port is not shared, all addresses should be physical */
1177 if (!pd->port_subport_cnt)
1181 size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size;
1184 * Each process has all the subport uregbase, rcvhdrq, and
1185 * rcvegrbufs mmapped - as an array for all the processes,
1186 * and also separately for this process.
1188 if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) {
1189 addr = pd->subport_uregbase;
1190 size = PAGE_SIZE * pd->port_subport_cnt;
1191 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) {
1192 addr = pd->subport_rcvhdr_base;
1193 size = pd->port_rcvhdrq_size * pd->port_subport_cnt;
1194 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) {
1195 addr = pd->subport_rcvegrbuf;
1196 size *= pd->port_subport_cnt;
1197 } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase +
1198 PAGE_SIZE * subport)) {
1199 addr = pd->subport_uregbase + PAGE_SIZE * subport;
1201 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base +
1202 pd->port_rcvhdrq_size * subport)) {
1203 addr = pd->subport_rcvhdr_base +
1204 pd->port_rcvhdrq_size * subport;
1205 size = pd->port_rcvhdrq_size;
1206 } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf +
1208 addr = pd->subport_rcvegrbuf + size * subport;
1209 /* rcvegrbufs are read-only on the slave */
1210 if (vma->vm_flags & VM_WRITE) {
1211 dev_info(&dd->pcidev->dev,
1212 "Can't map eager buffers as "
1213 "writable (flags=%lx)\n", vma->vm_flags);
1218 * Don't allow permission to later change to writeable
1221 vma->vm_flags &= ~VM_MAYWRITE;
1225 len = vma->vm_end - vma->vm_start;
1227 ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size);
1232 vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT;
1233 vma->vm_ops = &ipath_file_vm_ops;
1234 vma->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
1242 * ipath_mmap - mmap various structures into user space
1243 * @fp: the file pointer
1246 * We use this to have a shared buffer between the kernel and the user code
1247 * for the rcvhdr queue, egr buffers, and the per-port user regs and pio
1248 * buffers in the chip. We have the open and close entries so we can bump
1249 * the ref count and keep the driver from being unloaded while still mapped.
1251 static int ipath_mmap(struct file *fp, struct vm_area_struct *vma)
1253 struct ipath_portdata *pd;
1254 struct ipath_devdata *dd;
1256 unsigned piobufs, piocnt;
1267 * This is the ipath_do_user_init() code, mapping the shared buffers
1268 * into the user process. The address referred to by vm_pgoff is the
1269 * file offset passed via mmap(). For shared ports, this is the
1270 * kernel vmalloc() address of the pages to share with the master.
1271 * For non-shared or master ports, this is a physical address.
1272 * We only do one mmap for each space mapped.
1274 pgaddr = vma->vm_pgoff << PAGE_SHIFT;
1277 * Check for 0 in case one of the allocations failed, but user
1278 * called mmap anyway.
1285 ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n",
1286 (unsigned long long) pgaddr, vma->vm_start,
1287 vma->vm_end - vma->vm_start, dd->ipath_unit,
1288 pd->port_port, subport_fp(fp));
1291 * Physical addresses must fit in 40 bits for our hardware.
1292 * Check for kernel virtual addresses first, anything else must
1293 * match a HW or memory address.
1295 ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp));
1302 ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port;
1303 if (!pd->port_subport_cnt) {
1304 /* port is not shared */
1305 piocnt = dd->ipath_pbufsport;
1306 piobufs = pd->port_piobufs;
1307 } else if (!subport_fp(fp)) {
1308 /* caller is the master */
1309 piocnt = (dd->ipath_pbufsport / pd->port_subport_cnt) +
1310 (dd->ipath_pbufsport % pd->port_subport_cnt);
1311 piobufs = pd->port_piobufs +
1312 dd->ipath_palign * (dd->ipath_pbufsport - piocnt);
1314 unsigned slave = subport_fp(fp) - 1;
1316 /* caller is a slave */
1317 piocnt = dd->ipath_pbufsport / pd->port_subport_cnt;
1318 piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave;
1322 ret = mmap_ureg(vma, dd, ureg);
1323 else if (pgaddr == piobufs)
1324 ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt);
1325 else if (pgaddr == dd->ipath_pioavailregs_phys)
1326 /* in-memory copy of pioavail registers */
1327 ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0,
1328 (void *) dd->ipath_pioavailregs_dma,
1329 "pioavail registers");
1330 else if (pgaddr == pd->port_rcvegr_phys)
1331 ret = mmap_rcvegrbufs(vma, pd);
1332 else if (pgaddr == (u64) pd->port_rcvhdrq_phys)
1334 * The rcvhdrq itself; readonly except on HT (so have
1335 * to allow writable mapping), multiple pages, contiguous
1336 * from an i/o perspective.
1338 ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1,
1341 else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys)
1342 /* in-memory copy of rcvhdrq tail register */
1343 ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0,
1344 pd->port_rcvhdrtail_kvaddr,
1349 vma->vm_private_data = NULL;
1352 dev_info(&dd->pcidev->dev,
1353 "Failure %d on off %llx len %lx\n",
1354 -ret, (unsigned long long)pgaddr,
1355 vma->vm_end - vma->vm_start);
1360 static unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd)
1362 unsigned pollflag = 0;
1364 if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) &&
1365 pd->port_hdrqfull != pd->port_hdrqfull_poll) {
1366 pollflag |= POLLIN | POLLRDNORM;
1367 pd->port_hdrqfull_poll = pd->port_hdrqfull;
1373 static unsigned int ipath_poll_urgent(struct ipath_portdata *pd,
1375 struct poll_table_struct *pt)
1377 unsigned pollflag = 0;
1378 struct ipath_devdata *dd;
1382 /* variable access in ipath_poll_hdrqfull() needs this */
1384 pollflag = ipath_poll_hdrqfull(pd);
1386 if (pd->port_urgent != pd->port_urgent_poll) {
1387 pollflag |= POLLIN | POLLRDNORM;
1388 pd->port_urgent_poll = pd->port_urgent;
1392 /* this saves a spin_lock/unlock in interrupt handler... */
1393 set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag);
1394 /* flush waiting flag so don't miss an event... */
1396 poll_wait(fp, &pd->port_wait, pt);
1402 static unsigned int ipath_poll_next(struct ipath_portdata *pd,
1404 struct poll_table_struct *pt)
1408 unsigned pollflag = 0;
1409 struct ipath_devdata *dd;
1413 /* variable access in ipath_poll_hdrqfull() needs this */
1415 pollflag = ipath_poll_hdrqfull(pd);
1417 head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port);
1418 if (pd->port_rcvhdrtail_kvaddr)
1419 tail = ipath_get_rcvhdrtail(pd);
1421 tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port);
1424 pollflag |= POLLIN | POLLRDNORM;
1426 /* this saves a spin_lock/unlock in interrupt handler */
1427 set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag);
1428 /* flush waiting flag so we don't miss an event */
1431 set_bit(pd->port_port + dd->ipath_r_intravail_shift,
1432 &dd->ipath_rcvctrl);
1434 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1437 if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */
1438 ipath_write_ureg(dd, ur_rcvhdrhead,
1439 dd->ipath_rhdrhead_intr_off | head,
1442 poll_wait(fp, &pd->port_wait, pt);
1448 static unsigned int ipath_poll(struct file *fp,
1449 struct poll_table_struct *pt)
1451 struct ipath_portdata *pd;
1457 else if (pd->poll_type & IPATH_POLL_TYPE_URGENT)
1458 pollflag = ipath_poll_urgent(pd, fp, pt);
1460 pollflag = ipath_poll_next(pd, fp, pt);
1465 static int ipath_supports_subports(int user_swmajor, int user_swminor)
1467 /* no subport implementation prior to software version 1.3 */
1468 return (user_swmajor > 1) || (user_swminor >= 3);
1471 static int ipath_compatible_subports(int user_swmajor, int user_swminor)
1473 /* this code is written long-hand for clarity */
1474 if (IPATH_USER_SWMAJOR != user_swmajor) {
1475 /* no promise of compatibility if major mismatch */
1478 if (IPATH_USER_SWMAJOR == 1) {
1479 switch (IPATH_USER_SWMINOR) {
1483 /* no subport implementation so cannot be compatible */
1486 /* 3 is only compatible with itself */
1487 return user_swminor == 3;
1489 /* >= 4 are compatible (or are expected to be) */
1490 return user_swminor >= 4;
1493 /* make no promises yet for future major versions */
1497 static int init_subports(struct ipath_devdata *dd,
1498 struct ipath_portdata *pd,
1499 const struct ipath_user_info *uinfo)
1502 unsigned num_subports;
1506 * If the user is requesting zero subports,
1507 * skip the subport allocation.
1509 if (uinfo->spu_subport_cnt <= 0)
1512 /* Self-consistency check for ipath_compatible_subports() */
1513 if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) &&
1514 !ipath_compatible_subports(IPATH_USER_SWMAJOR,
1515 IPATH_USER_SWMINOR)) {
1516 dev_info(&dd->pcidev->dev,
1517 "Inconsistent ipath_compatible_subports()\n");
1521 /* Check for subport compatibility */
1522 if (!ipath_compatible_subports(uinfo->spu_userversion >> 16,
1523 uinfo->spu_userversion & 0xffff)) {
1524 dev_info(&dd->pcidev->dev,
1525 "Mismatched user version (%d.%d) and driver "
1526 "version (%d.%d) while port sharing. Ensure "
1527 "that driver and library are from the same "
1529 (int) (uinfo->spu_userversion >> 16),
1530 (int) (uinfo->spu_userversion & 0xffff),
1532 IPATH_USER_SWMINOR);
1535 if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) {
1540 num_subports = uinfo->spu_subport_cnt;
1541 pd->subport_uregbase = vmalloc(PAGE_SIZE * num_subports);
1542 if (!pd->subport_uregbase) {
1546 /* Note: pd->port_rcvhdrq_size isn't initialized yet. */
1547 size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize *
1548 sizeof(u32), PAGE_SIZE) * num_subports;
1549 pd->subport_rcvhdr_base = vmalloc(size);
1550 if (!pd->subport_rcvhdr_base) {
1555 pd->subport_rcvegrbuf = vmalloc(pd->port_rcvegrbuf_chunks *
1556 pd->port_rcvegrbuf_size *
1558 if (!pd->subport_rcvegrbuf) {
1563 pd->port_subport_cnt = uinfo->spu_subport_cnt;
1564 pd->port_subport_id = uinfo->spu_subport_id;
1565 pd->active_slaves = 1;
1566 set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag);
1567 memset(pd->subport_uregbase, 0, PAGE_SIZE * num_subports);
1568 memset(pd->subport_rcvhdr_base, 0, size);
1569 memset(pd->subport_rcvegrbuf, 0, pd->port_rcvegrbuf_chunks *
1570 pd->port_rcvegrbuf_size *
1575 vfree(pd->subport_rcvhdr_base);
1577 vfree(pd->subport_uregbase);
1578 pd->subport_uregbase = NULL;
1583 static int try_alloc_port(struct ipath_devdata *dd, int port,
1585 const struct ipath_user_info *uinfo)
1587 struct ipath_portdata *pd;
1590 if (!(pd = dd->ipath_pd[port])) {
1593 pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL);
1596 * Allocate memory for use in ipath_tid_update() just once
1597 * at open, not per call. Reduces cost of expected send
1600 ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) +
1601 dd->ipath_rcvtidcnt * sizeof(struct page **),
1604 ipath_dev_err(dd, "Unable to allocate portdata "
1605 "memory, failing open\n");
1611 dd->ipath_pd[port] = pd;
1612 dd->ipath_pd[port]->port_port = port;
1613 dd->ipath_pd[port]->port_dd = dd;
1614 dd->ipath_pd[port]->port_tid_pg_list = ptmp;
1615 init_waitqueue_head(&dd->ipath_pd[port]->port_wait);
1617 if (!pd->port_cnt) {
1618 pd->userversion = uinfo->spu_userversion;
1619 init_user_egr_sizes(pd);
1620 if ((ret = init_subports(dd, pd, uinfo)) != 0)
1622 ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n",
1623 current->comm, current->pid, dd->ipath_unit,
1627 pd->port_pid = current->pid;
1628 strncpy(pd->port_comm, current->comm, sizeof(pd->port_comm));
1629 ipath_chg_pioavailkernel(dd,
1630 dd->ipath_pbufsport * (pd->port_port - 1),
1631 dd->ipath_pbufsport, 0);
1632 ipath_stats.sps_ports++;
1641 static inline int usable(struct ipath_devdata *dd)
1644 (dd->ipath_flags & IPATH_PRESENT) &&
1645 dd->ipath_kregbase &&
1647 !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED
1651 static int find_free_port(int unit, struct file *fp,
1652 const struct ipath_user_info *uinfo)
1654 struct ipath_devdata *dd = ipath_lookup(unit);
1667 for (i = 1; i < dd->ipath_cfgports; i++) {
1668 ret = try_alloc_port(dd, i, fp, uinfo);
1678 static int find_best_unit(struct file *fp,
1679 const struct ipath_user_info *uinfo)
1681 int ret = 0, i, prefunit = -1, devmax;
1682 int maxofallports, npresent, nup;
1685 devmax = ipath_count_units(&npresent, &nup, &maxofallports);
1688 * This code is present to allow a knowledgeable person to
1689 * specify the layout of processes to processors before opening
1690 * this driver, and then we'll assign the process to the "closest"
1691 * InfiniPath chip to that processor (we assume reasonable connectivity,
1692 * for now). This code assumes that if affinity has been set
1693 * before this point, that at most one cpu is set; for now this
1694 * is reasonable. I check for both cpus_empty() and cpus_full(),
1695 * in case some kernel variant sets none of the bits when no
1696 * affinity is set. 2.6.11 and 12 kernels have all present
1697 * cpus set. Some day we'll have to fix it up further to handle
1698 * a cpu subset. This algorithm fails for two HT chips connected
1699 * in tunnel fashion. Eventually this needs real topology
1700 * information. There may be some issues with dual core numbering
1701 * as well. This needs more work prior to release.
1703 if (!cpus_empty(current->cpus_allowed) &&
1704 !cpus_full(current->cpus_allowed)) {
1705 int ncpus = num_online_cpus(), curcpu = -1, nset = 0;
1706 for (i = 0; i < ncpus; i++)
1707 if (cpu_isset(i, current->cpus_allowed)) {
1708 ipath_cdbg(PROC, "%s[%u] affinity set for "
1709 "cpu %d/%d\n", current->comm,
1710 current->pid, i, ncpus);
1714 if (curcpu != -1 && nset != ncpus) {
1716 prefunit = curcpu / (ncpus / npresent);
1717 ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, "
1718 "%d cpus/chip, select unit %d\n",
1719 current->comm, current->pid,
1720 npresent, ncpus, ncpus / npresent,
1727 * user ports start at 1, kernel port is 0
1728 * For now, we do round-robin access across all chips
1732 devmax = prefunit + 1;
1734 for (i = 1; i < maxofallports; i++) {
1735 for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax;
1737 struct ipath_devdata *dd = ipath_lookup(ndev);
1740 continue; /* can't use this unit */
1741 if (i >= dd->ipath_cfgports)
1743 * Maxed out on users of this unit. Try
1747 ret = try_alloc_port(dd, i, fp, uinfo);
1756 ipath_dbg("No ports available (none initialized "
1760 /* if started above 0, retry from 0 */
1762 "%s[%u] no ports on prefunit "
1763 "%d, clear and re-check\n",
1764 current->comm, current->pid,
1766 devmax = ipath_count_units(NULL, NULL,
1772 ipath_dbg("No ports available\n");
1776 ipath_dbg("No boards found\n");
1783 static int find_shared_port(struct file *fp,
1784 const struct ipath_user_info *uinfo)
1786 int devmax, ndev, i;
1789 devmax = ipath_count_units(NULL, NULL, NULL);
1791 for (ndev = 0; ndev < devmax; ndev++) {
1792 struct ipath_devdata *dd = ipath_lookup(ndev);
1796 for (i = 1; i < dd->ipath_cfgports; i++) {
1797 struct ipath_portdata *pd = dd->ipath_pd[i];
1799 /* Skip ports which are not yet open */
1800 if (!pd || !pd->port_cnt)
1802 /* Skip port if it doesn't match the requested one */
1803 if (pd->port_subport_id != uinfo->spu_subport_id)
1805 /* Verify the sharing process matches the master */
1806 if (pd->port_subport_cnt != uinfo->spu_subport_cnt ||
1807 pd->userversion != uinfo->spu_userversion ||
1808 pd->port_cnt >= pd->port_subport_cnt) {
1813 subport_fp(fp) = pd->port_cnt++;
1814 pd->port_subpid[subport_fp(fp)] = current->pid;
1815 tidcursor_fp(fp) = 0;
1816 pd->active_slaves |= 1 << subport_fp(fp);
1818 "%s[%u] %u sharing %s[%u] unit:port %u:%u\n",
1819 current->comm, current->pid,
1821 pd->port_comm, pd->port_pid,
1822 dd->ipath_unit, pd->port_port);
1832 static int ipath_open(struct inode *in, struct file *fp)
1834 /* The real work is performed later in ipath_assign_port() */
1835 fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL);
1836 return fp->private_data ? 0 : -ENOMEM;
1839 /* Get port early, so can set affinity prior to memory allocation */
1840 static int ipath_assign_port(struct file *fp,
1841 const struct ipath_user_info *uinfo)
1845 unsigned swmajor, swminor;
1847 /* Check to be sure we haven't already initialized this file */
1853 /* for now, if major version is different, bail */
1854 swmajor = uinfo->spu_userversion >> 16;
1855 if (swmajor != IPATH_USER_SWMAJOR) {
1856 ipath_dbg("User major version %d not same as driver "
1857 "major %d\n", uinfo->spu_userversion >> 16,
1858 IPATH_USER_SWMAJOR);
1863 swminor = uinfo->spu_userversion & 0xffff;
1864 if (swminor != IPATH_USER_SWMINOR)
1865 ipath_dbg("User minor version %d not same as driver "
1866 "minor %d\n", swminor, IPATH_USER_SWMINOR);
1868 mutex_lock(&ipath_mutex);
1870 if (ipath_compatible_subports(swmajor, swminor) &&
1871 uinfo->spu_subport_cnt &&
1872 (ret = find_shared_port(fp, uinfo))) {
1873 mutex_unlock(&ipath_mutex);
1879 i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE;
1880 ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n",
1881 (long)fp->f_path.dentry->d_inode->i_rdev, i_minor);
1884 ret = find_free_port(i_minor - 1, fp, uinfo);
1886 ret = find_best_unit(fp, uinfo);
1888 mutex_unlock(&ipath_mutex);
1895 static int ipath_do_user_init(struct file *fp,
1896 const struct ipath_user_info *uinfo)
1899 struct ipath_portdata *pd = port_fp(fp);
1900 struct ipath_devdata *dd;
1903 /* Subports don't need to initialize anything since master did it. */
1904 if (subport_fp(fp)) {
1905 ret = wait_event_interruptible(pd->port_wait,
1906 !test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag));
1912 if (uinfo->spu_rcvhdrsize) {
1913 ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize);
1918 /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */
1920 /* for right now, kernel piobufs are at end, so port 1 is at 0 */
1921 pd->port_piobufs = dd->ipath_piobufbase +
1922 dd->ipath_pbufsport * (pd->port_port - 1) * dd->ipath_palign;
1923 ipath_cdbg(VERBOSE, "Set base of piobufs for port %u to 0x%x\n",
1924 pd->port_port, pd->port_piobufs);
1927 * Now allocate the rcvhdr Q and eager TIDs; skip the TID
1928 * array for time being. If pd->port_port > chip-supported,
1929 * we need to do extra stuff here to handle by handling overflow
1930 * through port 0, someday
1932 ret = ipath_create_rcvhdrq(dd, pd);
1934 ret = ipath_create_user_egr(pd);
1939 * set the eager head register for this port to the current values
1940 * of the tail pointers, since we don't know if they were
1941 * updated on last use of the port.
1943 head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port);
1944 ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port);
1945 pd->port_lastrcvhdrqtail = -1;
1946 ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n",
1947 pd->port_port, head32);
1948 pd->port_tidcursor = 0; /* start at beginning after open */
1950 /* initialize poll variables... */
1951 pd->port_urgent = 0;
1952 pd->port_urgent_poll = 0;
1953 pd->port_hdrqfull_poll = pd->port_hdrqfull;
1956 * Now enable the port for receive.
1957 * For chips that are set to DMA the tail register to memory
1958 * when they change (and when the update bit transitions from
1959 * 0 to 1. So for those chips, we turn it off and then back on.
1960 * This will (very briefly) affect any other open ports, but the
1961 * duration is very short, and therefore isn't an issue. We
1962 * explictly set the in-memory tail copy to 0 beforehand, so we
1963 * don't have to wait to be sure the DMA update has happened
1964 * (chip resets head/tail to 0 on transition to enable).
1966 set_bit(dd->ipath_r_portenable_shift + pd->port_port,
1967 &dd->ipath_rcvctrl);
1968 if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) {
1969 if (pd->port_rcvhdrtail_kvaddr)
1970 ipath_clear_rcvhdrtail(pd);
1971 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1973 ~(1ULL << dd->ipath_r_tailupd_shift));
1975 ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
1977 /* Notify any waiting slaves */
1978 if (pd->port_subport_cnt) {
1979 clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag);
1980 wake_up(&pd->port_wait);
1987 * unlock_exptid - unlock any expected TID entries port still had in use
1990 * We don't actually update the chip here, because we do a bulk update
1991 * below, using ipath_f_clear_tids.
1993 static void unlock_expected_tids(struct ipath_portdata *pd)
1995 struct ipath_devdata *dd = pd->port_dd;
1996 int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt;
1997 int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt;
1999 ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n",
2001 for (i = port_tidbase; i < maxtid; i++) {
2002 struct page *ps = dd->ipath_pageshadow[i];
2007 dd->ipath_pageshadow[i] = NULL;
2008 pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i],
2009 PAGE_SIZE, PCI_DMA_FROMDEVICE);
2010 ipath_release_user_pages_on_close(&ps, 1);
2012 ipath_stats.sps_pageunlocks++;
2015 ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n",
2016 pd->port_port, cnt);
2018 if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks)
2019 ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n",
2020 (unsigned long long) ipath_stats.sps_pagelocks,
2021 (unsigned long long)
2022 ipath_stats.sps_pageunlocks);
2025 static int ipath_close(struct inode *in, struct file *fp)
2028 struct ipath_filedata *fd;
2029 struct ipath_portdata *pd;
2030 struct ipath_devdata *dd;
2033 ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n",
2034 (long)in->i_rdev, fp->private_data);
2036 mutex_lock(&ipath_mutex);
2038 fd = (struct ipath_filedata *) fp->private_data;
2039 fp->private_data = NULL;
2042 mutex_unlock(&ipath_mutex);
2045 if (--pd->port_cnt) {
2047 * XXX If the master closes the port before the slave(s),
2048 * revoke the mmap for the eager receive queue so
2049 * the slave(s) don't wait for receive data forever.
2051 pd->active_slaves &= ~(1 << fd->subport);
2052 pd->port_subpid[fd->subport] = 0;
2053 mutex_unlock(&ipath_mutex);
2056 port = pd->port_port;
2059 if (pd->port_hdrqfull) {
2060 ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors "
2061 "during run\n", pd->port_comm, pd->port_pid,
2063 pd->port_hdrqfull = 0;
2066 if (pd->port_rcvwait_to || pd->port_piowait_to
2067 || pd->port_rcvnowait || pd->port_pionowait) {
2068 ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; "
2069 "%u rcv %u, pio already\n",
2070 pd->port_port, pd->port_rcvwait_to,
2071 pd->port_piowait_to, pd->port_rcvnowait,
2072 pd->port_pionowait);
2073 pd->port_rcvwait_to = pd->port_piowait_to =
2074 pd->port_rcvnowait = pd->port_pionowait = 0;
2076 if (pd->port_flag) {
2077 ipath_dbg("port %u port_flag still set to 0x%lx\n",
2078 pd->port_port, pd->port_flag);
2082 if (dd->ipath_kregbase) {
2084 /* atomically clear receive enable port and intr avail. */
2085 clear_bit(dd->ipath_r_portenable_shift + port,
2086 &dd->ipath_rcvctrl);
2087 clear_bit(pd->port_port + dd->ipath_r_intravail_shift,
2088 &dd->ipath_rcvctrl);
2089 ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl,
2091 /* and read back from chip to be sure that nothing
2092 * else is in flight when we do the rest */
2093 (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
2095 /* clean up the pkeys for this port user */
2096 ipath_clean_part_key(pd, dd);
2098 * be paranoid, and never write 0's to these, just use an
2099 * unused part of the port 0 tail page. Of course,
2100 * rcvhdraddr points to a large chunk of memory, so this
2101 * could still trash things, but at least it won't trash
2102 * page 0, and by disabling the port, it should stop "soon",
2103 * even if a packet or two is in already in flight after we
2104 * disabled the port.
2106 ipath_write_kreg_port(dd,
2107 dd->ipath_kregs->kr_rcvhdrtailaddr, port,
2108 dd->ipath_dummy_hdrq_phys);
2109 ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr,
2110 pd->port_port, dd->ipath_dummy_hdrq_phys);
2112 i = dd->ipath_pbufsport * (port - 1);
2113 ipath_disarm_piobufs(dd, i, dd->ipath_pbufsport);
2114 ipath_chg_pioavailkernel(dd, i, dd->ipath_pbufsport, 1);
2116 dd->ipath_f_clear_tids(dd, pd->port_port);
2118 if (dd->ipath_pageshadow)
2119 unlock_expected_tids(pd);
2120 ipath_stats.sps_ports--;
2121 ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n",
2122 pd->port_comm, pd->port_pid,
2123 dd->ipath_unit, port);
2127 dd->ipath_pd[pd->port_port] = NULL; /* before releasing mutex */
2128 mutex_unlock(&ipath_mutex);
2129 ipath_free_pddata(dd, pd); /* after releasing the mutex */
2136 static int ipath_port_info(struct ipath_portdata *pd, u16 subport,
2137 struct ipath_port_info __user *uinfo)
2139 struct ipath_port_info info;
2144 (void) ipath_count_units(NULL, &nup, NULL);
2145 info.num_active = nup;
2146 info.unit = pd->port_dd->ipath_unit;
2147 info.port = pd->port_port;
2148 info.subport = subport;
2149 /* Don't return new fields if old library opened the port. */
2150 if (ipath_supports_subports(pd->userversion >> 16,
2151 pd->userversion & 0xffff)) {
2152 /* Number of user ports available for this device. */
2153 info.num_ports = pd->port_dd->ipath_cfgports - 1;
2154 info.num_subports = pd->port_subport_cnt;
2157 sz = sizeof(info) - 2 * sizeof(u16);
2159 if (copy_to_user(uinfo, &info, sz)) {
2169 static int ipath_get_slave_info(struct ipath_portdata *pd,
2170 void __user *slave_mask_addr)
2174 if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32)))
2179 static ssize_t ipath_write(struct file *fp, const char __user *data,
2180 size_t count, loff_t *off)
2182 const struct ipath_cmd __user *ucmd;
2183 struct ipath_portdata *pd;
2184 const void __user *src;
2185 size_t consumed, copy;
2186 struct ipath_cmd cmd;
2190 if (count < sizeof(cmd.type)) {
2195 ucmd = (const struct ipath_cmd __user *) data;
2197 if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) {
2202 consumed = sizeof(cmd.type);
2205 case IPATH_CMD_ASSIGN_PORT:
2206 case __IPATH_CMD_USER_INIT:
2207 case IPATH_CMD_USER_INIT:
2208 copy = sizeof(cmd.cmd.user_info);
2209 dest = &cmd.cmd.user_info;
2210 src = &ucmd->cmd.user_info;
2212 case IPATH_CMD_RECV_CTRL:
2213 copy = sizeof(cmd.cmd.recv_ctrl);
2214 dest = &cmd.cmd.recv_ctrl;
2215 src = &ucmd->cmd.recv_ctrl;
2217 case IPATH_CMD_PORT_INFO:
2218 copy = sizeof(cmd.cmd.port_info);
2219 dest = &cmd.cmd.port_info;
2220 src = &ucmd->cmd.port_info;
2222 case IPATH_CMD_TID_UPDATE:
2223 case IPATH_CMD_TID_FREE:
2224 copy = sizeof(cmd.cmd.tid_info);
2225 dest = &cmd.cmd.tid_info;
2226 src = &ucmd->cmd.tid_info;
2228 case IPATH_CMD_SET_PART_KEY:
2229 copy = sizeof(cmd.cmd.part_key);
2230 dest = &cmd.cmd.part_key;
2231 src = &ucmd->cmd.part_key;
2233 case __IPATH_CMD_SLAVE_INFO:
2234 copy = sizeof(cmd.cmd.slave_mask_addr);
2235 dest = &cmd.cmd.slave_mask_addr;
2236 src = &ucmd->cmd.slave_mask_addr;
2238 case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg
2243 case IPATH_CMD_POLL_TYPE:
2244 copy = sizeof(cmd.cmd.poll_type);
2245 dest = &cmd.cmd.poll_type;
2246 src = &ucmd->cmd.poll_type;
2248 case IPATH_CMD_ARMLAUNCH_CTRL:
2249 copy = sizeof(cmd.cmd.armlaunch_ctrl);
2250 dest = &cmd.cmd.armlaunch_ctrl;
2251 src = &ucmd->cmd.armlaunch_ctrl;
2259 if ((count - consumed) < copy) {
2264 if (copy_from_user(dest, src, copy)) {
2273 if (!pd && cmd.type != __IPATH_CMD_USER_INIT &&
2274 cmd.type != IPATH_CMD_ASSIGN_PORT) {
2280 case IPATH_CMD_ASSIGN_PORT:
2281 ret = ipath_assign_port(fp, &cmd.cmd.user_info);
2285 case __IPATH_CMD_USER_INIT:
2286 /* backwards compatibility, get port first */
2287 ret = ipath_assign_port(fp, &cmd.cmd.user_info);
2290 /* and fall through to current version. */
2291 case IPATH_CMD_USER_INIT:
2292 ret = ipath_do_user_init(fp, &cmd.cmd.user_info);
2295 ret = ipath_get_base_info(
2296 fp, (void __user *) (unsigned long)
2297 cmd.cmd.user_info.spu_base_info,
2298 cmd.cmd.user_info.spu_base_info_size);
2300 case IPATH_CMD_RECV_CTRL:
2301 ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl);
2303 case IPATH_CMD_PORT_INFO:
2304 ret = ipath_port_info(pd, subport_fp(fp),
2305 (struct ipath_port_info __user *)
2306 (unsigned long) cmd.cmd.port_info);
2308 case IPATH_CMD_TID_UPDATE:
2309 ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info);
2311 case IPATH_CMD_TID_FREE:
2312 ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info);
2314 case IPATH_CMD_SET_PART_KEY:
2315 ret = ipath_set_part_key(pd, cmd.cmd.part_key);
2317 case __IPATH_CMD_SLAVE_INFO:
2318 ret = ipath_get_slave_info(pd,
2319 (void __user *) (unsigned long)
2320 cmd.cmd.slave_mask_addr);
2322 case IPATH_CMD_PIOAVAILUPD:
2323 ipath_force_pio_avail_update(pd->port_dd);
2325 case IPATH_CMD_POLL_TYPE:
2326 pd->poll_type = cmd.cmd.poll_type;
2328 case IPATH_CMD_ARMLAUNCH_CTRL:
2329 if (cmd.cmd.armlaunch_ctrl)
2330 ipath_enable_armlaunch(pd->port_dd);
2332 ipath_disable_armlaunch(pd->port_dd);
2343 static struct class *ipath_class;
2345 static int init_cdev(int minor, char *name, const struct file_operations *fops,
2346 struct cdev **cdevp, struct class_device **class_devp)
2348 const dev_t dev = MKDEV(IPATH_MAJOR, minor);
2349 struct cdev *cdev = NULL;
2350 struct class_device *class_dev = NULL;
2353 cdev = cdev_alloc();
2355 printk(KERN_ERR IPATH_DRV_NAME
2356 ": Could not allocate cdev for minor %d, %s\n",
2362 cdev->owner = THIS_MODULE;
2364 kobject_set_name(&cdev->kobj, name);
2366 ret = cdev_add(cdev, dev, 1);
2368 printk(KERN_ERR IPATH_DRV_NAME
2369 ": Could not add cdev for minor %d, %s (err %d)\n",
2374 class_dev = class_device_create(ipath_class, NULL, dev, NULL, name);
2376 if (IS_ERR(class_dev)) {
2377 ret = PTR_ERR(class_dev);
2378 printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
2379 "class_dev for minor %d, %s (err %d)\n",
2393 *class_devp = class_dev;
2402 int ipath_cdev_init(int minor, char *name, const struct file_operations *fops,
2403 struct cdev **cdevp, struct class_device **class_devp)
2405 return init_cdev(minor, name, fops, cdevp, class_devp);
2408 static void cleanup_cdev(struct cdev **cdevp,
2409 struct class_device **class_devp)
2411 struct class_device *class_dev = *class_devp;
2414 class_device_unregister(class_dev);
2424 void ipath_cdev_cleanup(struct cdev **cdevp,
2425 struct class_device **class_devp)
2427 cleanup_cdev(cdevp, class_devp);
2430 static struct cdev *wildcard_cdev;
2431 static struct class_device *wildcard_class_dev;
2433 static const dev_t dev = MKDEV(IPATH_MAJOR, 0);
2435 static int user_init(void)
2439 ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME);
2441 printk(KERN_ERR IPATH_DRV_NAME ": Could not register "
2442 "chrdev region (err %d)\n", -ret);
2446 ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME);
2448 if (IS_ERR(ipath_class)) {
2449 ret = PTR_ERR(ipath_class);
2450 printk(KERN_ERR IPATH_DRV_NAME ": Could not create "
2451 "device class (err %d)\n", -ret);
2457 unregister_chrdev_region(dev, IPATH_NMINORS);
2462 static void user_cleanup(void)
2465 class_destroy(ipath_class);
2469 unregister_chrdev_region(dev, IPATH_NMINORS);
2472 static atomic_t user_count = ATOMIC_INIT(0);
2473 static atomic_t user_setup = ATOMIC_INIT(0);
2475 int ipath_user_add(struct ipath_devdata *dd)
2480 if (atomic_inc_return(&user_count) == 1) {
2483 ipath_dev_err(dd, "Unable to set up user support: "
2484 "error %d\n", -ret);
2487 ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev,
2488 &wildcard_class_dev);
2490 ipath_dev_err(dd, "Could not create wildcard "
2491 "minor: error %d\n", -ret);
2495 atomic_set(&user_setup, 1);
2498 snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit);
2500 ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops,
2501 &dd->user_cdev, &dd->user_class_dev);
2503 ipath_dev_err(dd, "Could not create user minor %d, %s\n",
2504 dd->ipath_unit + 1, name);
2514 void ipath_user_remove(struct ipath_devdata *dd)
2516 cleanup_cdev(&dd->user_cdev, &dd->user_class_dev);
2518 if (atomic_dec_return(&user_count) == 0) {
2519 if (atomic_read(&user_setup) == 0)
2522 cleanup_cdev(&wildcard_cdev, &wildcard_class_dev);
2525 atomic_set(&user_setup, 0);