Commit | Line | Data |
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7f510b46 | 1 | /* |
e7eacd36 | 2 | * Copyright (c) 2006, 2007, 2008 QLogic Corporation. All rights reserved. |
7f510b46 BS |
3 | * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. |
4 | * | |
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: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
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. | |
23 | * | |
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 | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
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> | |
124b4dcb DO |
39 | #include <linux/highmem.h> |
40 | #include <linux/io.h> | |
41 | #include <linux/jiffies.h> | |
f2b9857e | 42 | #include <linux/smp_lock.h> |
7f510b46 BS |
43 | #include <asm/pgtable.h> |
44 | ||
45 | #include "ipath_kernel.h" | |
27b678dd | 46 | #include "ipath_common.h" |
124b4dcb | 47 | #include "ipath_user_sdma.h" |
7f510b46 BS |
48 | |
49 | static int ipath_open(struct inode *, struct file *); | |
50 | static int ipath_close(struct inode *, struct file *); | |
51 | static ssize_t ipath_write(struct file *, const char __user *, size_t, | |
52 | loff_t *); | |
124b4dcb DO |
53 | static ssize_t ipath_writev(struct kiocb *, const struct iovec *, |
54 | unsigned long , loff_t); | |
7f510b46 BS |
55 | static unsigned int ipath_poll(struct file *, struct poll_table_struct *); |
56 | static int ipath_mmap(struct file *, struct vm_area_struct *); | |
57 | ||
2b8693c0 | 58 | static const struct file_operations ipath_file_ops = { |
7f510b46 BS |
59 | .owner = THIS_MODULE, |
60 | .write = ipath_write, | |
124b4dcb | 61 | .aio_write = ipath_writev, |
7f510b46 BS |
62 | .open = ipath_open, |
63 | .release = ipath_close, | |
64 | .poll = ipath_poll, | |
65 | .mmap = ipath_mmap | |
66 | }; | |
67 | ||
0a5a83cf RC |
68 | /* |
69 | * Convert kernel virtual addresses to physical addresses so they don't | |
70 | * potentially conflict with the chip addresses used as mmap offsets. | |
71 | * It doesn't really matter what mmap offset we use as long as we can | |
72 | * interpret it correctly. | |
73 | */ | |
74 | static 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 | ||
9929b0fb | 86 | static int ipath_get_base_info(struct file *fp, |
7f510b46 BS |
87 | void __user *ubase, size_t ubase_size) |
88 | { | |
9929b0fb | 89 | struct ipath_portdata *pd = port_fp(fp); |
7f510b46 BS |
90 | int ret = 0; |
91 | struct ipath_base_info *kinfo = NULL; | |
92 | struct ipath_devdata *dd = pd->port_dd; | |
9929b0fb BS |
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 | } | |
7f510b46 | 106 | |
9929b0fb BS |
107 | sz = sizeof(*kinfo); |
108 | /* If port sharing is not requested, allow the old size structure */ | |
109 | if (!shared) | |
c7e29ff1 | 110 | sz -= 7 * sizeof(u64); |
9929b0fb | 111 | if (ubase_size < sz) { |
7f510b46 | 112 | ipath_cdbg(PROC, |
9929b0fb BS |
113 | "Base size %zu, need %zu (version mismatch?)\n", |
114 | ubase_size, sz); | |
7f510b46 BS |
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 | * have to mmap whole thing | |
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; | |
9929b0fb BS |
141 | kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt; |
142 | if (master) | |
143 | kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt; | |
7f510b46 BS |
144 | /* |
145 | * for this use, may be ipath_cfgports summed over all chips that | |
146 | * are are configured and present | |
147 | */ | |
148 | kinfo->spi_nports = dd->ipath_cfgports; | |
149 | /* unit (chip/board) our port is on */ | |
150 | kinfo->spi_unit = dd->ipath_unit; | |
151 | /* for now, only a single page */ | |
152 | kinfo->spi_tid_maxsize = PAGE_SIZE; | |
153 | ||
154 | /* | |
155 | * Doing this per port, and based on the skip value, etc. This has | |
156 | * to be the actual buffer size, since the protocol code treats it | |
157 | * as an array. | |
158 | * | |
159 | * These have to be set to user addresses in the user code via mmap. | |
160 | * These values are used on return to user code for the mmap target | |
161 | * addresses only. For 32 bit, same 44 bit address problem, so use | |
162 | * the physical address, not virtual. Before 2.6.11, using the | |
163 | * page_address() macro worked, but in 2.6.11, even that returns the | |
164 | * full 64 bit address (upper bits all 1's). So far, using the | |
165 | * physical addresses (or chip offsets, for chip mapping) works, but | |
9929b0fb BS |
166 | * no doubt some future kernel release will change that, and we'll be |
167 | * on to yet another method of dealing with this. | |
7f510b46 BS |
168 | */ |
169 | kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys; | |
9929b0fb | 170 | kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys; |
7f510b46 BS |
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; | |
9929b0fb | 176 | if (!shared) { |
e2ab41ca | 177 | kinfo->spi_piocnt = pd->port_piocnt; |
9929b0fb BS |
178 | kinfo->spi_piobufbase = (u64) pd->port_piobufs; |
179 | kinfo->__spi_uregbase = (u64) dd->ipath_uregbase + | |
a18e26ae | 180 | dd->ipath_ureg_align * pd->port_port; |
9929b0fb | 181 | } else if (master) { |
e2ab41ca DO |
182 | kinfo->spi_piocnt = (pd->port_piocnt / subport_cnt) + |
183 | (pd->port_piocnt % subport_cnt); | |
9929b0fb BS |
184 | /* Master's PIO buffers are after all the slave's */ |
185 | kinfo->spi_piobufbase = (u64) pd->port_piobufs + | |
186 | dd->ipath_palign * | |
e2ab41ca | 187 | (pd->port_piocnt - kinfo->spi_piocnt); |
9929b0fb BS |
188 | } else { |
189 | unsigned slave = subport_fp(fp) - 1; | |
7f510b46 | 190 | |
e2ab41ca | 191 | kinfo->spi_piocnt = pd->port_piocnt / subport_cnt; |
9929b0fb BS |
192 | kinfo->spi_piobufbase = (u64) pd->port_piobufs + |
193 | dd->ipath_palign * kinfo->spi_piocnt * slave; | |
c7e29ff1 | 194 | } |
1d7c2e52 | 195 | |
c7e29ff1 MD |
196 | if (shared) { |
197 | kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase + | |
a18e26ae | 198 | dd->ipath_ureg_align * pd->port_port; |
c7e29ff1 MD |
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 | ||
0a5a83cf | 203 | kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase + |
c7e29ff1 | 204 | PAGE_SIZE * subport_fp(fp)); |
9929b0fb | 205 | |
0a5a83cf | 206 | kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base + |
c7e29ff1 | 207 | pd->port_rcvhdrq_size * subport_fp(fp)); |
947d7617 | 208 | kinfo->spi_rcvhdr_tailaddr = 0; |
0a5a83cf | 209 | kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf + |
c7e29ff1 MD |
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); | |
9929b0fb BS |
224 | } |
225 | ||
226 | kinfo->spi_pioindex = (kinfo->spi_piobufbase - dd->ipath_piobufbase) / | |
227 | dd->ipath_palign; | |
7f510b46 BS |
228 | kinfo->spi_pioalign = dd->ipath_palign; |
229 | ||
230 | kinfo->spi_qpair = IPATH_KD_QP; | |
826d8010 DO |
231 | /* |
232 | * user mode PIO buffers are always 2KB, even when 4KB can | |
233 | * be received, and sent via the kernel; this is ibmaxlen | |
234 | * for 2K MTU. | |
235 | */ | |
236 | kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32); | |
7f510b46 BS |
237 | kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ |
238 | kinfo->spi_port = pd->port_port; | |
9929b0fb | 239 | kinfo->spi_subport = subport_fp(fp); |
eaf6733b | 240 | kinfo->spi_sw_version = IPATH_KERN_SWVERSION; |
7f510b46 BS |
241 | kinfo->spi_hw_version = dd->ipath_revision; |
242 | ||
9929b0fb BS |
243 | if (master) { |
244 | kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER; | |
9929b0fb BS |
245 | } |
246 | ||
c7e29ff1 MD |
247 | sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo); |
248 | if (copy_to_user(ubase, kinfo, sz)) | |
7f510b46 BS |
249 | ret = -EFAULT; |
250 | ||
251 | bail: | |
252 | kfree(kinfo); | |
253 | return ret; | |
254 | } | |
255 | ||
256 | /** | |
257 | * ipath_tid_update - update a port TID | |
258 | * @pd: the port | |
9929b0fb | 259 | * @fp: the ipath device file |
7f510b46 BS |
260 | * @ti: the TID information |
261 | * | |
262 | * The new implementation as of Oct 2004 is that the driver assigns | |
263 | * the tid and returns it to the caller. To make it easier to | |
264 | * catch bugs, and to reduce search time, we keep a cursor for | |
265 | * each port, walking the shadow tid array to find one that's not | |
266 | * in use. | |
267 | * | |
268 | * For now, if we can't allocate the full list, we fail, although | |
269 | * in the long run, we'll allocate as many as we can, and the | |
270 | * caller will deal with that by trying the remaining pages later. | |
271 | * That means that when we fail, we have to mark the tids as not in | |
272 | * use again, in our shadow copy. | |
273 | * | |
274 | * It's up to the caller to free the tids when they are done. | |
275 | * We'll unlock the pages as they free them. | |
276 | * | |
277 | * Also, right now we are locking one page at a time, but since | |
278 | * the intended use of this routine is for a single group of | |
279 | * virtually contiguous pages, that should change to improve | |
280 | * performance. | |
281 | */ | |
9929b0fb | 282 | static int ipath_tid_update(struct ipath_portdata *pd, struct file *fp, |
7f510b46 BS |
283 | const struct ipath_tid_info *ti) |
284 | { | |
285 | int ret = 0, ntids; | |
9929b0fb | 286 | u32 tid, porttid, cnt, i, tidcnt, tidoff; |
7f510b46 BS |
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; | |
9929b0fb | 294 | unsigned subport = subport_fp(fp); |
7f510b46 BS |
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 | * Should we treat as success? likely a bug | |
307 | */ | |
308 | ret = -EFAULT; | |
309 | goto done; | |
310 | } | |
9929b0fb BS |
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) { | |
7f510b46 BS |
329 | /* make sure it all fits in port_tid_pg_list */ |
330 | dev_info(&dd->pcidev->dev, "Process tried to allocate %u " | |
331 | "TIDs, only trying max (%u)\n", cnt, tidcnt); | |
332 | cnt = tidcnt; | |
333 | } | |
9929b0fb BS |
334 | pagep = &((struct page **) pd->port_tid_pg_list)[tidoff]; |
335 | tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff]; | |
7f510b46 BS |
336 | |
337 | memset(tidmap, 0, sizeof(tidmap)); | |
7f510b46 | 338 | /* before decrement; chip actual # */ |
7f510b46 BS |
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 | /* virtual address of first page in transfer */ | |
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 | * for now, continue, and see what happens but with | |
364 | * the new implementation, this should never happen, | |
365 | * unless perhaps the user has mpin'ed the pages | |
366 | * themselves (something we need to test) | |
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 | * oops, wrapped all the way through their TIDs, | |
386 | * and didn't have enough free; see comments at | |
387 | * start of routine | |
388 | */ | |
389 | ipath_dbg("Not enough free TIDs for %u pages " | |
390 | "(index %d), failing\n", cnt, i); | |
391 | i--; /* last tidlist[i] not filled in */ | |
392 | ret = -ENOMEM; | |
393 | break; | |
394 | } | |
9929b0fb | 395 | tidlist[i] = tid + tidoff; |
7f510b46 | 396 | ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " |
9929b0fb | 397 | "vaddr %lx\n", i, tid + tidoff, vaddr); |
7f510b46 BS |
398 | /* we "know" system pages and TID pages are same size */ |
399 | dd->ipath_pageshadow[porttid + tid] = pagep[i]; | |
1fd3b40f BS |
400 | dd->ipath_physshadow[porttid + tid] = ipath_map_page( |
401 | dd->pcidev, pagep[i], 0, PAGE_SIZE, | |
402 | PCI_DMA_FROMDEVICE); | |
7f510b46 BS |
403 | /* |
404 | * don't need atomic or it's overhead | |
405 | */ | |
406 | __set_bit(tid, tidmap); | |
1fd3b40f | 407 | physaddr = dd->ipath_physshadow[porttid + tid]; |
7f510b46 BS |
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]); | |
f716cdfe JE |
413 | dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED, |
414 | physaddr); | |
7f510b46 BS |
415 | /* |
416 | * don't check this tid in ipath_portshadow, since we | |
417 | * just filled it in; start with the next one. | |
418 | */ | |
419 | tid++; | |
420 | } | |
421 | ||
422 | if (ret) { | |
423 | u32 limit; | |
424 | cleanup: | |
425 | /* jump here if copy out of updated info failed... */ | |
426 | ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", | |
427 | -ret, i, cnt); | |
428 | /* same code that's in ipath_free_tid() */ | |
429 | limit = sizeof(tidmap) * BITS_PER_BYTE; | |
430 | if (limit > tidcnt) | |
431 | /* just in case size changes in future */ | |
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); | |
f716cdfe JE |
440 | dd->ipath_f_put_tid(dd, &tidbase[tid], |
441 | RCVHQ_RCV_TYPE_EXPECTED, | |
7f510b46 | 442 | dd->ipath_tidinvalid); |
1fd3b40f BS |
443 | pci_unmap_page(dd->pcidev, |
444 | dd->ipath_physshadow[porttid + tid], | |
445 | PAGE_SIZE, PCI_DMA_FROMDEVICE); | |
7f510b46 BS |
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 | * Copy the updated array, with ipath_tid's filled in, back | |
454 | * to user. Since we did the copy in already, this "should | |
455 | * never fail" If it does, we have to clean up... | |
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; | |
9929b0fb BS |
470 | if (!pd->port_subport_cnt) |
471 | pd->port_tidcursor = tid; | |
472 | else | |
473 | tidcursor_fp(fp) = tid; | |
7f510b46 BS |
474 | } |
475 | ||
476 | done: | |
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 | /** | |
484 | * ipath_tid_free - free a port TID | |
485 | * @pd: the port | |
9929b0fb | 486 | * @subport: the subport |
7f510b46 BS |
487 | * @ti: the TID info |
488 | * | |
489 | * right now we are unlocking one page at a time, but since | |
490 | * the intended use of this routine is for a single group of | |
491 | * virtually contiguous pages, that should change to improve | |
492 | * performance. We check that the TID is in range for this port | |
493 | * but otherwise don't check validity; if user has an error and | |
494 | * frees the wrong tid, it's only their own data that can thereby | |
495 | * be corrupted. We do check that the TID was in use, for sanity | |
496 | * We always use our idea of the saved address, not the address that | |
497 | * they pass in to us. | |
498 | */ | |
499 | ||
9929b0fb | 500 | static int ipath_tid_free(struct ipath_portdata *pd, unsigned subport, |
7f510b46 BS |
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; | |
9929b0fb BS |
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 | } | |
7f510b46 BS |
531 | tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + |
532 | dd->ipath_rcvtidbase + | |
533 | porttid * sizeof(*tidbase)); | |
534 | ||
7f510b46 BS |
535 | limit = sizeof(tidmap) * BITS_PER_BYTE; |
536 | if (limit > tidcnt) | |
537 | /* just in case size changes in future */ | |
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 | * small optimization; if we detect a run of 3 or so without | |
546 | * any set, use find_first_bit again. That's mainly to | |
547 | * accelerate the case where we wrapped, so we have some at | |
548 | * the beginning, and some at the end, and a big gap | |
549 | * in the middle. | |
550 | */ | |
551 | if (!test_bit(tid, tidmap)) | |
552 | continue; | |
553 | cnt++; | |
554 | if (dd->ipath_pageshadow[porttid + tid]) { | |
3ac8c70f DO |
555 | struct page *p; |
556 | p = dd->ipath_pageshadow[porttid + tid]; | |
557 | dd->ipath_pageshadow[porttid + tid] = NULL; | |
7f510b46 | 558 | ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", |
40d97692 | 559 | pid_nr(pd->port_pid), tid); |
f716cdfe JE |
560 | dd->ipath_f_put_tid(dd, &tidbase[tid], |
561 | RCVHQ_RCV_TYPE_EXPECTED, | |
7f510b46 | 562 | dd->ipath_tidinvalid); |
1fd3b40f BS |
563 | pci_unmap_page(dd->pcidev, |
564 | dd->ipath_physshadow[porttid + tid], | |
565 | PAGE_SIZE, PCI_DMA_FROMDEVICE); | |
3ac8c70f | 566 | ipath_release_user_pages(&p, 1); |
7f510b46 BS |
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); | |
574 | done: | |
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 | /** | |
582 | * ipath_set_part_key - set a partition key | |
583 | * @pd: the port | |
584 | * @key: the key | |
585 | * | |
586 | * We can have up to 4 active at a time (other than the default, which is | |
587 | * always allowed). This is somewhat tricky, since multiple ports may set | |
588 | * the same key, so we reference count them, and clean up at exit. All 4 | |
589 | * partition keys are packed into a single infinipath register. It's an | |
590 | * error for a process to set the same pkey multiple times. We provide no | |
591 | * mechanism to de-allocate a pkey at this time, we may eventually need to | |
592 | * do that. I've used the atomic operations, and no locking, and only make | |
593 | * a single pass through what's available. This should be more than | |
594 | * adequate for some time. I'll think about spinlocks or the like if and as | |
595 | * it's necessary. | |
596 | */ | |
597 | static 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 | ||
27b678dd | 604 | if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) { |
7f510b46 BS |
605 | /* nothing to do; this key always valid */ |
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 | * Set the full membership bit, because it has to be | |
627 | * set in the register or the packet, and it seems | |
628 | * cleaner to set in the register than to force all | |
629 | * callers to set it. (see bug 4331) | |
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 | * lost race, decrement count, catch below | |
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 | * It makes no sense to have both the limited and | |
680 | * full membership PKEY set at the same time since | |
681 | * the unlimited one will disable the limited one. | |
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 | /* for ipathstats, etc. */ | |
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 | ||
721 | bail: | |
722 | return ret; | |
723 | } | |
724 | ||
725 | /** | |
726 | * ipath_manage_rcvq - manage a port's receive queue | |
727 | * @pd: the port | |
9929b0fb | 728 | * @subport: the subport |
7f510b46 BS |
729 | * @start_stop: action to carry out |
730 | * | |
731 | * start_stop == 0 disables receive on the port, for use in queue | |
732 | * overflow conditions. start_stop==1 re-enables, to be used to | |
733 | * re-init the software copy of the head register | |
734 | */ | |
9929b0fb BS |
735 | static int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport, |
736 | int start_stop) | |
7f510b46 BS |
737 | { |
738 | struct ipath_devdata *dd = pd->port_dd; | |
7f510b46 | 739 | |
9929b0fb | 740 | ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n", |
7f510b46 | 741 | start_stop ? "en" : "dis", dd->ipath_unit, |
9929b0fb BS |
742 | pd->port_port, subport); |
743 | if (subport) | |
744 | goto bail; | |
7f510b46 BS |
745 | /* atomically clear receive enable port. */ |
746 | if (start_stop) { | |
747 | /* | |
748 | * On enable, force in-memory copy of the tail register to | |
749 | * 0, so that protocol code doesn't have to worry about | |
750 | * whether or not the chip has yet updated the in-memory | |
751 | * copy or not on return from the system call. The chip | |
752 | * always resets it's tail register back to 0 on a | |
753 | * transition from disabled to enabled. This could cause a | |
754 | * problem if software was broken, and did the enable w/o | |
755 | * the disable, but eventually the in-memory copy will be | |
756 | * updated and correct itself, even in the face of software | |
757 | * bugs. | |
758 | */ | |
c59a80ac RC |
759 | if (pd->port_rcvhdrtail_kvaddr) |
760 | ipath_clear_rcvhdrtail(pd); | |
d8274869 | 761 | set_bit(dd->ipath_r_portenable_shift + pd->port_port, |
7f510b46 BS |
762 | &dd->ipath_rcvctrl); |
763 | } else | |
d8274869 | 764 | clear_bit(dd->ipath_r_portenable_shift + pd->port_port, |
7f510b46 BS |
765 | &dd->ipath_rcvctrl); |
766 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, | |
767 | dd->ipath_rcvctrl); | |
768 | /* now be sure chip saw it before we return */ | |
44f8e3f3 | 769 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
7f510b46 BS |
770 | if (start_stop) { |
771 | /* | |
772 | * And try to be sure that tail reg update has happened too. | |
773 | * This should in theory interlock with the RXE changes to | |
774 | * the tail register. Don't assign it to the tail register | |
775 | * in memory copy, since we could overwrite an update by the | |
776 | * chip if we did. | |
777 | */ | |
44f8e3f3 | 778 | ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); |
7f510b46 BS |
779 | } |
780 | /* always; new head should be equal to new tail; see above */ | |
9929b0fb | 781 | bail: |
7f510b46 BS |
782 | return 0; |
783 | } | |
784 | ||
785 | static 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 | /* for debugging only */ | |
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 | /* check for match independent of the global bit */ | |
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 | ||
9929b0fb BS |
839 | /* |
840 | * Initialize the port data with the receive buffer sizes | |
841 | * so this can be done while the master port is locked. | |
842 | * Otherwise, there is a race with a slave opening the port | |
843 | * and seeing these fields uninitialized. | |
844 | */ | |
845 | static 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 | * to avoid wasting a lot of memory, we allocate 32KB chunks of | |
852 | * physically contiguous memory, advance through it until used up | |
853 | * and then allocate more. Of course, we need memory to store those | |
854 | * extra pointers, now. Started out with 256KB, but under heavy | |
855 | * memory pressure (creating large files and then copying them over | |
856 | * NFS while doing lots of MPI jobs), we hit some allocation | |
857 | * failures, even though we can sleep... (2.6.10) Still get | |
858 | * failures at 64K. 32K is the lowest we can go without wasting | |
859 | * additional memory. | |
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 | ||
7f510b46 BS |
869 | /** |
870 | * ipath_create_user_egr - allocate eager TID buffers | |
871 | * @pd: the port to allocate TID buffers for | |
872 | * | |
873 | * This routine is now quite different for user and kernel, because | |
874 | * the kernel uses skb's, for the accelerated network performance | |
875 | * This is the user port version | |
876 | * | |
877 | * Allocate the eager TID buffers and program them into infinipath | |
878 | * They are no longer completely contiguous, we do multiple allocation | |
879 | * calls. | |
880 | */ | |
881 | static int ipath_create_user_egr(struct ipath_portdata *pd) | |
882 | { | |
883 | struct ipath_devdata *dd = pd->port_dd; | |
9929b0fb | 884 | unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff; |
7f510b46 BS |
885 | size_t size; |
886 | int ret; | |
0ed9a4a0 BS |
887 | gfp_t gfp_flags; |
888 | ||
889 | /* | |
890 | * GFP_USER, but without GFP_FS, so buffer cache can be | |
891 | * coalesced (we hope); otherwise, even at order 4, | |
892 | * heavy filesystem activity makes these fail, and we can | |
893 | * use compound pages. | |
894 | */ | |
895 | gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; | |
7f510b46 BS |
896 | |
897 | egrcnt = dd->ipath_rcvegrcnt; | |
898 | /* TID number offset for this port */ | |
60948a41 | 899 | egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt; |
7f510b46 BS |
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 | ||
9929b0fb BS |
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); | |
7f510b46 BS |
909 | if (!pd->port_rcvegrbuf) { |
910 | ret = -ENOMEM; | |
911 | goto bail; | |
912 | } | |
913 | pd->port_rcvegrbuf_phys = | |
9929b0fb BS |
914 | kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]), |
915 | GFP_KERNEL); | |
7f510b46 BS |
916 | if (!pd->port_rcvegrbuf_phys) { |
917 | ret = -ENOMEM; | |
918 | goto bail_rcvegrbuf; | |
919 | } | |
920 | for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { | |
7f510b46 BS |
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 + | |
f716cdfe JE |
943 | dd->ipath_rcvegrbase), |
944 | RCVHQ_RCV_TYPE_EAGER, pa); | |
7f510b46 BS |
945 | pa += egrsize; |
946 | } | |
947 | cond_resched(); /* don't hog the cpu */ | |
948 | } | |
949 | ||
950 | ret = 0; | |
951 | goto bail; | |
952 | ||
953 | bail_rcvegrbuf_phys: | |
954 | for (e = 0; e < pd->port_rcvegrbuf_chunks && | |
f37bda92 | 955 | pd->port_rcvegrbuf[e]; e++) { |
7f510b46 BS |
956 | dma_free_coherent(&dd->pcidev->dev, size, |
957 | pd->port_rcvegrbuf[e], | |
958 | pd->port_rcvegrbuf_phys[e]); | |
959 | ||
f37bda92 | 960 | } |
9929b0fb | 961 | kfree(pd->port_rcvegrbuf_phys); |
7f510b46 BS |
962 | pd->port_rcvegrbuf_phys = NULL; |
963 | bail_rcvegrbuf: | |
9929b0fb | 964 | kfree(pd->port_rcvegrbuf); |
7f510b46 BS |
965 | pd->port_rcvegrbuf = NULL; |
966 | bail: | |
967 | return ret; | |
968 | } | |
969 | ||
f37bda92 BS |
970 | |
971 | /* common code for the mappings on dma_alloc_coherent mem */ | |
972 | static int ipath_mmap_mem(struct vm_area_struct *vma, | |
1fd3b40f BS |
973 | struct ipath_portdata *pd, unsigned len, int write_ok, |
974 | void *kvaddr, char *what) | |
f37bda92 BS |
975 | { |
976 | struct ipath_devdata *dd = pd->port_dd; | |
1fd3b40f | 977 | unsigned long pfn; |
f37bda92 BS |
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 | /* don't allow them to later change with mprotect */ | |
997 | vma->vm_flags &= ~VM_MAYWRITE; | |
998 | } | |
999 | ||
1fd3b40f | 1000 | pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT; |
f37bda92 BS |
1001 | ret = remap_pfn_range(vma, vma->vm_start, pfn, |
1002 | len, vma->vm_page_prot); | |
1003 | if (ret) | |
1fd3b40f BS |
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); | |
f37bda92 | 1007 | else |
1fd3b40f BS |
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'); | |
f37bda92 BS |
1011 | bail: |
1012 | return ret; | |
1013 | } | |
1014 | ||
7f510b46 BS |
1015 | static int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, |
1016 | u64 ureg) | |
1017 | { | |
1018 | unsigned long phys; | |
1019 | int ret; | |
1020 | ||
f37bda92 BS |
1021 | /* |
1022 | * This is real hardware, so use io_remap. This is the mechanism | |
1023 | * for the user process to update the head registers for their port | |
1024 | * in the chip. | |
1025 | */ | |
7f510b46 BS |
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 | ||
1043 | static int mmap_piobufs(struct vm_area_struct *vma, | |
1044 | struct ipath_devdata *dd, | |
9929b0fb BS |
1045 | struct ipath_portdata *pd, |
1046 | unsigned piobufs, unsigned piocnt) | |
7f510b46 BS |
1047 | { |
1048 | unsigned long phys; | |
1049 | int ret; | |
1050 | ||
1051 | /* | |
f37bda92 BS |
1052 | * When we map the PIO buffers in the chip, we want to map them as |
1053 | * writeonly, no read possible. This prevents access to previous | |
1054 | * process data, and catches users who might try to read the i/o | |
1055 | * space due to a bug. | |
7f510b46 | 1056 | */ |
9929b0fb | 1057 | if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) { |
7f510b46 BS |
1058 | dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " |
1059 | "reqlen %lx > PAGE\n", | |
1060 | vma->vm_end - vma->vm_start); | |
9929b0fb | 1061 | ret = -EINVAL; |
7f510b46 BS |
1062 | goto bail; |
1063 | } | |
1064 | ||
9929b0fb | 1065 | phys = dd->ipath_physaddr + piobufs; |
f37bda92 | 1066 | |
eb9dc6f4 BS |
1067 | #if defined(__powerpc__) |
1068 | /* There isn't a generic way to specify writethrough mappings */ | |
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 | ||
367fe711 BS |
1074 | /* |
1075 | * don't allow them to later change to readable with mprotect (for when | |
1076 | * not initially mapped readable, as is normally the case) | |
1077 | */ | |
f37bda92 | 1078 | vma->vm_flags &= ~VM_MAYREAD; |
7f510b46 BS |
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); | |
1084 | bail: | |
1085 | return ret; | |
1086 | } | |
1087 | ||
1088 | static 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; | |
1fd3b40f | 1094 | unsigned long pfn; |
7f510b46 BS |
1095 | int ret; |
1096 | ||
7f510b46 BS |
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); | |
9929b0fb | 1104 | ret = -EINVAL; |
7f510b46 BS |
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 | } | |
f37bda92 BS |
1114 | /* don't allow them to later change to writeable with mprotect */ |
1115 | vma->vm_flags &= ~VM_MAYWRITE; | |
7f510b46 BS |
1116 | |
1117 | start = vma->vm_start; | |
7f510b46 | 1118 | |
7f510b46 | 1119 | for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { |
1fd3b40f BS |
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); | |
7f510b46 BS |
1123 | if (ret < 0) |
1124 | goto bail; | |
1125 | } | |
1126 | ret = 0; | |
1127 | ||
1128 | bail: | |
1129 | return ret; | |
1130 | } | |
1131 | ||
9929b0fb | 1132 | /* |
3c845086 | 1133 | * ipath_file_vma_fault - handle a VMA page fault. |
9929b0fb | 1134 | */ |
3c845086 NP |
1135 | static int ipath_file_vma_fault(struct vm_area_struct *vma, |
1136 | struct vm_fault *vmf) | |
9929b0fb | 1137 | { |
3c845086 | 1138 | struct page *page; |
9929b0fb | 1139 | |
3c845086 | 1140 | page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); |
9929b0fb | 1141 | if (!page) |
3c845086 | 1142 | return VM_FAULT_SIGBUS; |
9929b0fb | 1143 | get_page(page); |
3c845086 NP |
1144 | vmf->page = page; |
1145 | ||
1146 | return 0; | |
9929b0fb BS |
1147 | } |
1148 | ||
1149 | static struct vm_operations_struct ipath_file_vm_ops = { | |
3c845086 | 1150 | .fault = ipath_file_vma_fault, |
9929b0fb BS |
1151 | }; |
1152 | ||
1153 | static 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; | |
0a5a83cf | 1160 | int ret = 0; |
9929b0fb BS |
1161 | |
1162 | /* If the port is not shared, all addresses should be physical */ | |
0a5a83cf | 1163 | if (!pd->port_subport_cnt) |
9929b0fb | 1164 | goto bail; |
9929b0fb BS |
1165 | |
1166 | dd = pd->port_dd; | |
1167 | size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; | |
1168 | ||
1169 | /* | |
c7e29ff1 MD |
1170 | * Each process has all the subport uregbase, rcvhdrq, and |
1171 | * rcvegrbufs mmapped - as an array for all the processes, | |
1172 | * and also separately for this process. | |
9929b0fb | 1173 | */ |
c7e29ff1 MD |
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 | /* rcvegrbufs are read-only on the slave */ | |
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 | * Don't allow permission to later change to writeable | |
1205 | * with mprotect. | |
1206 | */ | |
1207 | vma->vm_flags &= ~VM_MAYWRITE; | |
1208 | } else { | |
9929b0fb | 1209 | goto bail; |
c7e29ff1 | 1210 | } |
9929b0fb BS |
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; | |
0a5a83cf | 1221 | ret = 1; |
9929b0fb BS |
1222 | |
1223 | bail: | |
1224 | return ret; | |
1225 | } | |
1226 | ||
7f510b46 BS |
1227 | /** |
1228 | * ipath_mmap - mmap various structures into user space | |
1229 | * @fp: the file pointer | |
1230 | * @vma: the VM area | |
1231 | * | |
1232 | * We use this to have a shared buffer between the kernel and the user code | |
1233 | * for the rcvhdr queue, egr buffers, and the per-port user regs and pio | |
1234 | * buffers in the chip. We have the open and close entries so we can bump | |
1235 | * the ref count and keep the driver from being unloaded while still mapped. | |
1236 | */ | |
1237 | static 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; | |
9929b0fb | 1242 | unsigned piobufs, piocnt; |
7f510b46 BS |
1243 | int ret; |
1244 | ||
1245 | pd = port_fp(fp); | |
9929b0fb BS |
1246 | if (!pd) { |
1247 | ret = -EINVAL; | |
1248 | goto bail; | |
1249 | } | |
7f510b46 | 1250 | dd = pd->port_dd; |
f37bda92 | 1251 | |
7f510b46 BS |
1252 | /* |
1253 | * This is the ipath_do_user_init() code, mapping the shared buffers | |
1254 | * into the user process. The address referred to by vm_pgoff is the | |
9929b0fb BS |
1255 | * file offset passed via mmap(). For shared ports, this is the |
1256 | * kernel vmalloc() address of the pages to share with the master. | |
1257 | * For non-shared or master ports, this is a physical address. | |
1258 | * We only do one mmap for each space mapped. | |
7f510b46 BS |
1259 | */ |
1260 | pgaddr = vma->vm_pgoff << PAGE_SHIFT; | |
1261 | ||
1262 | /* | |
9929b0fb BS |
1263 | * Check for 0 in case one of the allocations failed, but user |
1264 | * called mmap anyway. | |
7f510b46 | 1265 | */ |
9929b0fb BS |
1266 | if (!pgaddr) { |
1267 | ret = -EINVAL; | |
1268 | goto bail; | |
f37bda92 | 1269 | } |
7f510b46 | 1270 | |
9929b0fb | 1271 | ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n", |
7f510b46 | 1272 | (unsigned long long) pgaddr, vma->vm_start, |
9929b0fb BS |
1273 | vma->vm_end - vma->vm_start, dd->ipath_unit, |
1274 | pd->port_port, subport_fp(fp)); | |
7f510b46 | 1275 | |
9929b0fb BS |
1276 | /* |
1277 | * Physical addresses must fit in 40 bits for our hardware. | |
1278 | * Check for kernel virtual addresses first, anything else must | |
1279 | * match a HW or memory address. | |
1280 | */ | |
0a5a83cf RC |
1281 | ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp)); |
1282 | if (ret) { | |
1283 | if (ret > 0) | |
1284 | ret = 0; | |
9929b0fb BS |
1285 | goto bail; |
1286 | } | |
1287 | ||
a18e26ae | 1288 | ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port; |
9929b0fb BS |
1289 | if (!pd->port_subport_cnt) { |
1290 | /* port is not shared */ | |
e2ab41ca | 1291 | piocnt = pd->port_piocnt; |
9929b0fb BS |
1292 | piobufs = pd->port_piobufs; |
1293 | } else if (!subport_fp(fp)) { | |
1294 | /* caller is the master */ | |
e2ab41ca DO |
1295 | piocnt = (pd->port_piocnt / pd->port_subport_cnt) + |
1296 | (pd->port_piocnt % pd->port_subport_cnt); | |
9929b0fb | 1297 | piobufs = pd->port_piobufs + |
e2ab41ca | 1298 | dd->ipath_palign * (pd->port_piocnt - piocnt); |
9929b0fb BS |
1299 | } else { |
1300 | unsigned slave = subport_fp(fp) - 1; | |
1301 | ||
1302 | /* caller is a slave */ | |
e2ab41ca | 1303 | piocnt = pd->port_piocnt / pd->port_subport_cnt; |
9929b0fb | 1304 | piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave; |
f37bda92 | 1305 | } |
9929b0fb BS |
1306 | |
1307 | if (pgaddr == ureg) | |
7f510b46 | 1308 | ret = mmap_ureg(vma, dd, ureg); |
9929b0fb BS |
1309 | else if (pgaddr == piobufs) |
1310 | ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt); | |
1311 | else if (pgaddr == dd->ipath_pioavailregs_phys) | |
1312 | /* in-memory copy of pioavail registers */ | |
1313 | ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, | |
1fd3b40f | 1314 | (void *) dd->ipath_pioavailregs_dma, |
9929b0fb | 1315 | "pioavail registers"); |
9929b0fb | 1316 | else if (pgaddr == pd->port_rcvegr_phys) |
7f510b46 | 1317 | ret = mmap_rcvegrbufs(vma, pd); |
9929b0fb | 1318 | else if (pgaddr == (u64) pd->port_rcvhdrq_phys) |
f37bda92 | 1319 | /* |
525d0ca1 | 1320 | * The rcvhdrq itself; readonly except on HT (so have |
f37bda92 BS |
1321 | * to allow writable mapping), multiple pages, contiguous |
1322 | * from an i/o perspective. | |
1323 | */ | |
9929b0fb | 1324 | ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1, |
1fd3b40f | 1325 | pd->port_rcvhdrq, |
f37bda92 | 1326 | "rcvhdrq"); |
9929b0fb | 1327 | else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys) |
f37bda92 BS |
1328 | /* in-memory copy of rcvhdrq tail register */ |
1329 | ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, | |
1fd3b40f | 1330 | pd->port_rcvhdrtail_kvaddr, |
f37bda92 | 1331 | "rcvhdrq tail"); |
7f510b46 BS |
1332 | else |
1333 | ret = -EINVAL; | |
1334 | ||
1335 | vma->vm_private_data = NULL; | |
1336 | ||
1337 | if (ret < 0) | |
1338 | dev_info(&dd->pcidev->dev, | |
9929b0fb BS |
1339 | "Failure %d on off %llx len %lx\n", |
1340 | -ret, (unsigned long long)pgaddr, | |
1341 | vma->vm_end - vma->vm_start); | |
1342 | bail: | |
7f510b46 BS |
1343 | return ret; |
1344 | } | |
1345 | ||
70c51da2 AJ |
1346 | static 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 | ||
f2d04231 RW |
1359 | static unsigned int ipath_poll_urgent(struct ipath_portdata *pd, |
1360 | struct file *fp, | |
1361 | struct poll_table_struct *pt) | |
7f510b46 | 1362 | { |
e35d710d | 1363 | unsigned pollflag = 0; |
7f510b46 BS |
1364 | struct ipath_devdata *dd; |
1365 | ||
7f510b46 BS |
1366 | dd = pd->port_dd; |
1367 | ||
70c51da2 AJ |
1368 | /* variable access in ipath_poll_hdrqfull() needs this */ |
1369 | rmb(); | |
1370 | pollflag = ipath_poll_hdrqfull(pd); | |
7f510b46 | 1371 | |
70c51da2 | 1372 | if (pd->port_urgent != pd->port_urgent_poll) { |
f2d04231 | 1373 | pollflag |= POLLIN | POLLRDNORM; |
70c51da2 | 1374 | pd->port_urgent_poll = pd->port_urgent; |
f2d04231 | 1375 | } |
7f510b46 | 1376 | |
f2d04231 | 1377 | if (!pollflag) { |
70c51da2 | 1378 | /* this saves a spin_lock/unlock in interrupt handler... */ |
f2d04231 | 1379 | set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag); |
70c51da2 AJ |
1380 | /* flush waiting flag so don't miss an event... */ |
1381 | wmb(); | |
f2d04231 RW |
1382 | poll_wait(fp, &pd->port_wait, pt); |
1383 | } | |
1384 | ||
1385 | return pollflag; | |
1386 | } | |
1387 | ||
1388 | static unsigned int ipath_poll_next(struct ipath_portdata *pd, | |
1389 | struct file *fp, | |
1390 | struct poll_table_struct *pt) | |
1391 | { | |
70c51da2 AJ |
1392 | u32 head; |
1393 | u32 tail; | |
f2d04231 RW |
1394 | unsigned pollflag = 0; |
1395 | struct ipath_devdata *dd; | |
1396 | ||
1397 | dd = pd->port_dd; | |
7f510b46 | 1398 | |
70c51da2 AJ |
1399 | /* variable access in ipath_poll_hdrqfull() needs this */ |
1400 | rmb(); | |
1401 | pollflag = ipath_poll_hdrqfull(pd); | |
1402 | ||
7f510b46 | 1403 | head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); |
c59a80ac RC |
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); | |
f2d04231 | 1408 | |
70c51da2 | 1409 | if (head != tail) |
f2d04231 | 1410 | pollflag |= POLLIN | POLLRDNORM; |
70c51da2 AJ |
1411 | else { |
1412 | /* this saves a spin_lock/unlock in interrupt handler */ | |
7f510b46 | 1413 | set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); |
70c51da2 AJ |
1414 | /* flush waiting flag so we don't miss an event */ |
1415 | wmb(); | |
f2d04231 | 1416 | |
d8274869 | 1417 | set_bit(pd->port_port + dd->ipath_r_intravail_shift, |
f2d04231 RW |
1418 | &dd->ipath_rcvctrl); |
1419 | ||
1420 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, | |
1421 | dd->ipath_rcvctrl); | |
1422 | ||
9929b0fb | 1423 | if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ |
f2d04231 RW |
1424 | ipath_write_ureg(dd, ur_rcvhdrhead, |
1425 | dd->ipath_rhdrhead_intr_off | head, | |
1426 | pd->port_port); | |
7f510b46 | 1427 | |
f2d04231 | 1428 | poll_wait(fp, &pd->port_wait, pt); |
7f510b46 BS |
1429 | } |
1430 | ||
f2d04231 RW |
1431 | return pollflag; |
1432 | } | |
1433 | ||
1434 | static 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); | |
7f510b46 | 1447 | |
e35d710d | 1448 | return pollflag; |
7f510b46 BS |
1449 | } |
1450 | ||
0df6291c MD |
1451 | static int ipath_supports_subports(int user_swmajor, int user_swminor) |
1452 | { | |
1453 | /* no subport implementation prior to software version 1.3 */ | |
1454 | return (user_swmajor > 1) || (user_swminor >= 3); | |
1455 | } | |
1456 | ||
1457 | static int ipath_compatible_subports(int user_swmajor, int user_swminor) | |
1458 | { | |
1459 | /* this code is written long-hand for clarity */ | |
1460 | if (IPATH_USER_SWMAJOR != user_swmajor) { | |
1461 | /* no promise of compatibility if major mismatch */ | |
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 | /* no subport implementation so cannot be compatible */ | |
1470 | return 0; | |
1471 | case 3: | |
1472 | /* 3 is only compatible with itself */ | |
1473 | return user_swminor == 3; | |
1474 | default: | |
1475 | /* >= 4 are compatible (or are expected to be) */ | |
1476 | return user_swminor >= 4; | |
1477 | } | |
1478 | } | |
1479 | /* make no promises yet for future major versions */ | |
1480 | return 0; | |
1481 | } | |
1482 | ||
9929b0fb BS |
1483 | static int init_subports(struct ipath_devdata *dd, |
1484 | struct ipath_portdata *pd, | |
1485 | const struct ipath_user_info *uinfo) | |
1486 | { | |
1487 | int ret = 0; | |
c7e29ff1 | 1488 | unsigned num_subports; |
9929b0fb BS |
1489 | size_t size; |
1490 | ||
9929b0fb | 1491 | /* |
bacf4013 | 1492 | * If the user is requesting zero subports, |
9929b0fb BS |
1493 | * skip the subport allocation. |
1494 | */ | |
bacf4013 | 1495 | if (uinfo->spu_subport_cnt <= 0) |
9929b0fb | 1496 | goto bail; |
c7e29ff1 | 1497 | |
0df6291c MD |
1498 | /* Self-consistency check for ipath_compatible_subports() */ |
1499 | if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) && | |
1500 | !ipath_compatible_subports(IPATH_USER_SWMAJOR, | |
1501 | IPATH_USER_SWMINOR)) { | |
c7e29ff1 | 1502 | dev_info(&dd->pcidev->dev, |
0df6291c MD |
1503 | "Inconsistent ipath_compatible_subports()\n"); |
1504 | goto bail; | |
1505 | } | |
1506 | ||
1507 | /* Check for subport compatibility */ | |
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 " | |
c7e29ff1 MD |
1513 | "that driver and library are from the same " |
1514 | "release.\n", | |
0df6291c | 1515 | (int) (uinfo->spu_userversion >> 16), |
c7e29ff1 | 1516 | (int) (uinfo->spu_userversion & 0xffff), |
0df6291c | 1517 | IPATH_USER_SWMAJOR, |
c7e29ff1 MD |
1518 | IPATH_USER_SWMINOR); |
1519 | goto bail; | |
1520 | } | |
0a5a83cf | 1521 | if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) { |
9929b0fb BS |
1522 | ret = -EINVAL; |
1523 | goto bail; | |
1524 | } | |
1525 | ||
c7e29ff1 MD |
1526 | num_subports = uinfo->spu_subport_cnt; |
1527 | pd->subport_uregbase = vmalloc(PAGE_SIZE * num_subports); | |
9929b0fb BS |
1528 | if (!pd->subport_uregbase) { |
1529 | ret = -ENOMEM; | |
1530 | goto bail; | |
1531 | } | |
1532 | /* Note: pd->port_rcvhdrq_size isn't initialized yet. */ | |
1533 | size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * | |
c7e29ff1 | 1534 | sizeof(u32), PAGE_SIZE) * num_subports; |
9929b0fb BS |
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 * | |
c7e29ff1 | 1543 | num_subports); |
9929b0fb BS |
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; | |
947d7617 | 1552 | set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); |
c7e29ff1 MD |
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); | |
9929b0fb BS |
1558 | goto bail; |
1559 | ||
1560 | bail_rhdr: | |
1561 | vfree(pd->subport_rcvhdr_base); | |
1562 | bail_ureg: | |
1563 | vfree(pd->subport_uregbase); | |
1564 | pd->subport_uregbase = NULL; | |
1565 | bail: | |
1566 | return ret; | |
1567 | } | |
1568 | ||
7f510b46 | 1569 | static int try_alloc_port(struct ipath_devdata *dd, int port, |
9929b0fb BS |
1570 | struct file *fp, |
1571 | const struct ipath_user_info *uinfo) | |
7f510b46 | 1572 | { |
9929b0fb | 1573 | struct ipath_portdata *pd; |
7f510b46 BS |
1574 | int ret; |
1575 | ||
9929b0fb BS |
1576 | if (!(pd = dd->ipath_pd[port])) { |
1577 | void *ptmp; | |
7f510b46 | 1578 | |
9929b0fb | 1579 | pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); |
7f510b46 BS |
1580 | |
1581 | /* | |
1582 | * Allocate memory for use in ipath_tid_update() just once | |
1583 | * at open, not per call. Reduces cost of expected send | |
1584 | * setup. | |
1585 | */ | |
1586 | ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + | |
1587 | dd->ipath_rcvtidcnt * sizeof(struct page **), | |
1588 | GFP_KERNEL); | |
9929b0fb | 1589 | if (!pd || !ptmp) { |
7f510b46 BS |
1590 | ipath_dev_err(dd, "Unable to allocate portdata " |
1591 | "memory, failing open\n"); | |
1592 | ret = -ENOMEM; | |
9929b0fb | 1593 | kfree(pd); |
7f510b46 BS |
1594 | kfree(ptmp); |
1595 | goto bail; | |
1596 | } | |
9929b0fb | 1597 | dd->ipath_pd[port] = pd; |
7f510b46 BS |
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 | } | |
9929b0fb BS |
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; | |
7f510b46 BS |
1608 | ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", |
1609 | current->comm, current->pid, dd->ipath_unit, | |
1610 | port); | |
9929b0fb BS |
1611 | pd->port_cnt = 1; |
1612 | port_fp(fp) = pd; | |
40d97692 | 1613 | pd->port_pid = get_pid(task_pid(current)); |
9929b0fb | 1614 | strncpy(pd->port_comm, current->comm, sizeof(pd->port_comm)); |
7f510b46 BS |
1615 | ipath_stats.sps_ports++; |
1616 | ret = 0; | |
9929b0fb BS |
1617 | } else |
1618 | ret = -EBUSY; | |
7f510b46 BS |
1619 | |
1620 | bail: | |
1621 | return ret; | |
1622 | } | |
1623 | ||
1624 | static 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 | ||
9929b0fb BS |
1634 | static int find_free_port(int unit, struct file *fp, |
1635 | const struct ipath_user_info *uinfo) | |
7f510b46 BS |
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 | ||
9929b0fb BS |
1650 | for (i = 1; i < dd->ipath_cfgports; i++) { |
1651 | ret = try_alloc_port(dd, i, fp, uinfo); | |
7f510b46 BS |
1652 | if (ret != -EBUSY) |
1653 | goto bail; | |
1654 | } | |
1655 | ret = -EBUSY; | |
1656 | ||
1657 | bail: | |
1658 | return ret; | |
1659 | } | |
1660 | ||
9929b0fb BS |
1661 | static int find_best_unit(struct file *fp, |
1662 | const struct ipath_user_info *uinfo) | |
7f510b46 BS |
1663 | { |
1664 | int ret = 0, i, prefunit = -1, devmax; | |
1665 | int maxofallports, npresent, nup; | |
1666 | int ndev; | |
1667 | ||
9929b0fb | 1668 | devmax = ipath_count_units(&npresent, &nup, &maxofallports); |
7f510b46 BS |
1669 | |
1670 | /* | |
1671 | * This code is present to allow a knowledgeable person to | |
1672 | * specify the layout of processes to processors before opening | |
1673 | * this driver, and then we'll assign the process to the "closest" | |
525d0ca1 | 1674 | * InfiniPath chip to that processor (we assume reasonable connectivity, |
7f510b46 BS |
1675 | * for now). This code assumes that if affinity has been set |
1676 | * before this point, that at most one cpu is set; for now this | |
1677 | * is reasonable. I check for both cpus_empty() and cpus_full(), | |
1678 | * in case some kernel variant sets none of the bits when no | |
1679 | * affinity is set. 2.6.11 and 12 kernels have all present | |
1680 | * cpus set. Some day we'll have to fix it up further to handle | |
525d0ca1 | 1681 | * a cpu subset. This algorithm fails for two HT chips connected |
7f510b46 BS |
1682 | * in tunnel fashion. Eventually this needs real topology |
1683 | * information. There may be some issues with dual core numbering | |
1684 | * as well. This needs more work prior to release. | |
1685 | */ | |
1686 | if (!cpus_empty(current->cpus_allowed) && | |
1687 | !cpus_full(current->cpus_allowed)) { | |
f0810daf | 1688 | int ncpus = num_online_cpus(), curcpu = -1, nset = 0; |
7f510b46 BS |
1689 | for (i = 0; i < ncpus; i++) |
1690 | if (cpu_isset(i, current->cpus_allowed)) { | |
1691 | ipath_cdbg(PROC, "%s[%u] affinity set for " | |
f0810daf BS |
1692 | "cpu %d/%d\n", current->comm, |
1693 | current->pid, i, ncpus); | |
7f510b46 | 1694 | curcpu = i; |
f0810daf | 1695 | nset++; |
7f510b46 | 1696 | } |
f0810daf | 1697 | if (curcpu != -1 && nset != ncpus) { |
7f510b46 BS |
1698 | if (npresent) { |
1699 | prefunit = curcpu / (ncpus / npresent); | |
c7e29ff1 | 1700 | ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, " |
7f510b46 BS |
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 | * user ports start at 1, kernel port is 0 | |
1711 | * For now, we do round-robin access across all chips | |
1712 | */ | |
1713 | ||
1714 | if (prefunit != -1) | |
1715 | devmax = prefunit + 1; | |
7f510b46 BS |
1716 | recheck: |
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; /* can't use this unit */ | |
1724 | if (i >= dd->ipath_cfgports) | |
1725 | /* | |
1726 | * Maxed out on users of this unit. Try | |
1727 | * next. | |
1728 | */ | |
1729 | continue; | |
9929b0fb | 1730 | ret = try_alloc_port(dd, i, fp, uinfo); |
7f510b46 BS |
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 | /* if started above 0, retry from 0 */ | |
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 | ||
1762 | done: | |
1763 | return ret; | |
1764 | } | |
1765 | ||
9929b0fb BS |
1766 | static 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 | ||
5d1ce03d | 1777 | if (!usable(dd)) |
9929b0fb BS |
1778 | continue; |
1779 | for (i = 1; i < dd->ipath_cfgports; i++) { | |
1780 | struct ipath_portdata *pd = dd->ipath_pd[i]; | |
1781 | ||
1782 | /* Skip ports which are not yet open */ | |
1783 | if (!pd || !pd->port_cnt) | |
1784 | continue; | |
1785 | /* Skip port if it doesn't match the requested one */ | |
1786 | if (pd->port_subport_id != uinfo->spu_subport_id) | |
1787 | continue; | |
1788 | /* Verify the sharing process matches the master */ | |
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++; | |
40d97692 PE |
1797 | pd->port_subpid[subport_fp(fp)] = |
1798 | get_pid(task_pid(current)); | |
9929b0fb BS |
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), | |
40d97692 | 1805 | pd->port_comm, pid_nr(pd->port_pid), |
9929b0fb BS |
1806 | dd->ipath_unit, pd->port_port); |
1807 | ret = 1; | |
1808 | goto done; | |
1809 | } | |
1810 | } | |
1811 | ||
1812 | done: | |
1813 | return ret; | |
1814 | } | |
1815 | ||
7f510b46 BS |
1816 | static int ipath_open(struct inode *in, struct file *fp) |
1817 | { | |
c97d27d8 | 1818 | /* The real work is performed later in ipath_assign_port() */ |
f2b9857e | 1819 | cycle_kernel_lock(); |
9929b0fb BS |
1820 | fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL); |
1821 | return fp->private_data ? 0 : -ENOMEM; | |
1822 | } | |
1823 | ||
c97d27d8 BS |
1824 | /* Get port early, so can set affinity prior to memory allocation */ |
1825 | static int ipath_assign_port(struct file *fp, | |
9929b0fb BS |
1826 | const struct ipath_user_info *uinfo) |
1827 | { | |
1828 | int ret; | |
9929b0fb | 1829 | int i_minor; |
0df6291c | 1830 | unsigned swmajor, swminor; |
9929b0fb BS |
1831 | |
1832 | /* Check to be sure we haven't already initialized this file */ | |
1833 | if (port_fp(fp)) { | |
1834 | ret = -EINVAL; | |
1835 | goto done; | |
1836 | } | |
1837 | ||
1838 | /* for now, if major version is different, bail */ | |
0df6291c MD |
1839 | swmajor = uinfo->spu_userversion >> 16; |
1840 | if (swmajor != IPATH_USER_SWMAJOR) { | |
9929b0fb BS |
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); | |
7f510b46 BS |
1852 | |
1853 | mutex_lock(&ipath_mutex); | |
1854 | ||
0df6291c MD |
1855 | if (ipath_compatible_subports(swmajor, swminor) && |
1856 | uinfo->spu_subport_cnt && | |
9929b0fb | 1857 | (ret = find_shared_port(fp, uinfo))) { |
9929b0fb BS |
1858 | if (ret > 0) |
1859 | ret = 0; | |
124b4dcb | 1860 | goto done_chk_sdma; |
9929b0fb BS |
1861 | } |
1862 | ||
1cfd6e64 | 1863 | i_minor = iminor(fp->f_path.dentry->d_inode) - IPATH_USER_MINOR_BASE; |
7f510b46 | 1864 | ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", |
1cfd6e64 | 1865 | (long)fp->f_path.dentry->d_inode->i_rdev, i_minor); |
7f510b46 | 1866 | |
9929b0fb BS |
1867 | if (i_minor) |
1868 | ret = find_free_port(i_minor - 1, fp, uinfo); | |
7f510b46 | 1869 | else |
9929b0fb | 1870 | ret = find_best_unit(fp, uinfo); |
7f510b46 | 1871 | |
124b4dcb DO |
1872 | done_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 | ||
7f510b46 | 1887 | mutex_unlock(&ipath_mutex); |
9929b0fb | 1888 | |
c97d27d8 BS |
1889 | done: |
1890 | return ret; | |
1891 | } | |
1892 | ||
1893 | ||
1894 | static int ipath_do_user_init(struct file *fp, | |
1895 | const struct ipath_user_info *uinfo) | |
1896 | { | |
1897 | int ret; | |
947d7617 | 1898 | struct ipath_portdata *pd = port_fp(fp); |
c97d27d8 BS |
1899 | struct ipath_devdata *dd; |
1900 | u32 head32; | |
9929b0fb | 1901 | |
947d7617 RC |
1902 | /* Subports don't need to initialize anything since master did it. */ |
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 | ||
9929b0fb BS |
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 | /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ | |
1918 | ||
e2ab41ca DO |
1919 | /* some ports may get extra buffers, calculate that here */ |
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 | ||
9929b0fb | 1925 | /* for right now, kernel piobufs are at end, so port 1 is at 0 */ |
e2ab41ca DO |
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); | |
9929b0fb | 1932 | pd->port_piobufs = dd->ipath_piobufbase + |
e2ab41ca DO |
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); | |
9929b0fb BS |
1938 | |
1939 | /* | |
1940 | * Now allocate the rcvhdr Q and eager TIDs; skip the TID | |
1941 | * array for time being. If pd->port_port > chip-supported, | |
1942 | * we need to do extra stuff here to handle by handling overflow | |
1943 | * through port 0, someday | |
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 | * set the eager head register for this port to the current values | |
1953 | * of the tail pointers, since we don't know if they were | |
1954 | * updated on last use of the port. | |
1955 | */ | |
1956 | head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); | |
1957 | ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); | |
755807a2 | 1958 | pd->port_lastrcvhdrqtail = -1; |
9929b0fb BS |
1959 | ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n", |
1960 | pd->port_port, head32); | |
1961 | pd->port_tidcursor = 0; /* start at beginning after open */ | |
70c51da2 AJ |
1962 | |
1963 | /* initialize poll variables... */ | |
1964 | pd->port_urgent = 0; | |
1965 | pd->port_urgent_poll = 0; | |
1966 | pd->port_hdrqfull_poll = pd->port_hdrqfull; | |
1967 | ||
9929b0fb | 1968 | /* |
9355fb6a RC |
1969 | * Now enable the port for receive. |
1970 | * For chips that are set to DMA the tail register to memory | |
1971 | * when they change (and when the update bit transitions from | |
1972 | * 0 to 1. So for those chips, we turn it off and then back on. | |
1973 | * This will (very briefly) affect any other open ports, but the | |
1974 | * duration is very short, and therefore isn't an issue. We | |
1975 | * explictly set the in-memory tail copy to 0 beforehand, so we | |
1976 | * don't have to wait to be sure the DMA update has happened | |
1977 | * (chip resets head/tail to 0 on transition to enable). | |
9929b0fb | 1978 | */ |
d8274869 | 1979 | set_bit(dd->ipath_r_portenable_shift + pd->port_port, |
9929b0fb | 1980 | &dd->ipath_rcvctrl); |
9355fb6a RC |
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, | |
d8274869 DO |
1985 | dd->ipath_rcvctrl & |
1986 | ~(1ULL << dd->ipath_r_tailupd_shift)); | |
9355fb6a | 1987 | } |
9929b0fb BS |
1988 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, |
1989 | dd->ipath_rcvctrl); | |
947d7617 RC |
1990 | /* Notify any waiting slaves */ |
1991 | if (pd->port_subport_cnt) { | |
1992 | clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); | |
1993 | wake_up(&pd->port_wait); | |
1994 | } | |
9929b0fb | 1995 | done: |
7f510b46 BS |
1996 | return ret; |
1997 | } | |
1998 | ||
1999 | /** | |
2000 | * unlock_exptid - unlock any expected TID entries port still had in use | |
2001 | * @pd: port | |
2002 | * | |
2003 | * We don't actually update the chip here, because we do a bulk update | |
2004 | * below, using ipath_f_clear_tids. | |
2005 | */ | |
2006 | static 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++) { | |
9355fb6a RC |
2015 | struct page *ps = dd->ipath_pageshadow[i]; |
2016 | ||
2017 | if (!ps) | |
7f510b46 BS |
2018 | continue; |
2019 | ||
9355fb6a | 2020 | dd->ipath_pageshadow[i] = NULL; |
1fd3b40f BS |
2021 | pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i], |
2022 | PAGE_SIZE, PCI_DMA_FROMDEVICE); | |
9355fb6a | 2023 | ipath_release_user_pages_on_close(&ps, 1); |
7f510b46 BS |
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 | ||
2038 | static int ipath_close(struct inode *in, struct file *fp) | |
2039 | { | |
2040 | int ret = 0; | |
9929b0fb | 2041 | struct ipath_filedata *fd; |
7f510b46 BS |
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 | ||
9929b0fb | 2051 | fd = (struct ipath_filedata *) fp->private_data; |
7f510b46 | 2052 | fp->private_data = NULL; |
9929b0fb BS |
2053 | pd = fd->pd; |
2054 | if (!pd) { | |
2055 | mutex_unlock(&ipath_mutex); | |
2056 | goto bail; | |
2057 | } | |
124b4dcb DO |
2058 | |
2059 | dd = pd->port_dd; | |
2060 | ||
2061 | /* drain user sdma queue */ | |
2062 | ipath_user_sdma_queue_drain(dd, fd->pq); | |
2063 | ipath_user_sdma_queue_destroy(fd->pq); | |
2064 | ||
9929b0fb BS |
2065 | if (--pd->port_cnt) { |
2066 | /* | |
2067 | * XXX If the master closes the port before the slave(s), | |
2068 | * revoke the mmap for the eager receive queue so | |
2069 | * the slave(s) don't wait for receive data forever. | |
2070 | */ | |
2071 | pd->active_slaves &= ~(1 << fd->subport); | |
40d97692 PE |
2072 | put_pid(pd->port_subpid[fd->subport]); |
2073 | pd->port_subpid[fd->subport] = NULL; | |
9929b0fb BS |
2074 | mutex_unlock(&ipath_mutex); |
2075 | goto bail; | |
2076 | } | |
2077 | port = pd->port_port; | |
7f510b46 BS |
2078 | |
2079 | if (pd->port_hdrqfull) { | |
2080 | ipath_cdbg(PROC, "%s[%u] had %u rcvhdrqfull errors " | |
40d97692 | 2081 | "during run\n", pd->port_comm, pid_nr(pd->port_pid), |
7f510b46 BS |
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) { | |
bb917144 | 2097 | ipath_cdbg(PROC, "port %u port_flag set: 0x%lx\n", |
7f510b46 BS |
2098 | pd->port_port, pd->port_flag); |
2099 | pd->port_flag = 0; | |
2100 | } | |
2101 | ||
2102 | if (dd->ipath_kregbase) { | |
70c51da2 | 2103 | /* atomically clear receive enable port and intr avail. */ |
d8274869 | 2104 | clear_bit(dd->ipath_r_portenable_shift + port, |
35783ec0 | 2105 | &dd->ipath_rcvctrl); |
d8274869 | 2106 | clear_bit(pd->port_port + dd->ipath_r_intravail_shift, |
70c51da2 | 2107 | &dd->ipath_rcvctrl); |
35783ec0 BS |
2108 | ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl, |
2109 | dd->ipath_rcvctrl); | |
2110 | /* and read back from chip to be sure that nothing | |
2111 | * else is in flight when we do the rest */ | |
2112 | (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); | |
7f510b46 BS |
2113 | |
2114 | /* clean up the pkeys for this port user */ | |
2115 | ipath_clean_part_key(pd, dd); | |
35783ec0 BS |
2116 | /* |
2117 | * be paranoid, and never write 0's to these, just use an | |
2118 | * unused part of the port 0 tail page. Of course, | |
2119 | * rcvhdraddr points to a large chunk of memory, so this | |
2120 | * could still trash things, but at least it won't trash | |
2121 | * page 0, and by disabling the port, it should stop "soon", | |
2122 | * even if a packet or two is in already in flight after we | |
2123 | * disabled the port. | |
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 | ||
e2ab41ca DO |
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); | |
35783ec0 | 2134 | |
1fd3b40f BS |
2135 | dd->ipath_f_clear_tids(dd, pd->port_port); |
2136 | ||
35783ec0 BS |
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", | |
40d97692 | 2141 | pd->port_comm, pid_nr(pd->port_pid), |
35783ec0 | 2142 | dd->ipath_unit, port); |
7f510b46 BS |
2143 | } |
2144 | ||
40d97692 PE |
2145 | put_pid(pd->port_pid); |
2146 | pd->port_pid = NULL; | |
f37bda92 | 2147 | dd->ipath_pd[pd->port_port] = NULL; /* before releasing mutex */ |
7f510b46 | 2148 | mutex_unlock(&ipath_mutex); |
f37bda92 | 2149 | ipath_free_pddata(dd, pd); /* after releasing the mutex */ |
7f510b46 | 2150 | |
9929b0fb BS |
2151 | bail: |
2152 | kfree(fd); | |
7f510b46 BS |
2153 | return ret; |
2154 | } | |
2155 | ||
9929b0fb | 2156 | static int ipath_port_info(struct ipath_portdata *pd, u16 subport, |
7f510b46 BS |
2157 | struct ipath_port_info __user *uinfo) |
2158 | { | |
2159 | struct ipath_port_info info; | |
2160 | int nup; | |
2161 | int ret; | |
9929b0fb | 2162 | size_t sz; |
7f510b46 BS |
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; | |
9929b0fb BS |
2168 | info.subport = subport; |
2169 | /* Don't return new fields if old library opened the port. */ | |
0df6291c MD |
2170 | if (ipath_supports_subports(pd->userversion >> 16, |
2171 | pd->userversion & 0xffff)) { | |
9929b0fb BS |
2172 | /* Number of user ports available for this device. */ |
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); | |
7f510b46 | 2178 | |
9929b0fb | 2179 | if (copy_to_user(uinfo, &info, sz)) { |
7f510b46 BS |
2180 | ret = -EFAULT; |
2181 | goto bail; | |
2182 | } | |
2183 | ret = 0; | |
2184 | ||
2185 | bail: | |
2186 | return ret; | |
2187 | } | |
2188 | ||
9929b0fb BS |
2189 | static 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 | ||
124b4dcb DO |
2199 | static 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 | ||
2210 | static 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 | ||
7f510b46 BS |
2228 | static 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) { | |
c97d27d8 BS |
2254 | case IPATH_CMD_ASSIGN_PORT: |
2255 | case __IPATH_CMD_USER_INIT: | |
7f510b46 BS |
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; | |
c7e29ff1 | 2282 | case __IPATH_CMD_SLAVE_INFO: |
9929b0fb BS |
2283 | copy = sizeof(cmd.cmd.slave_mask_addr); |
2284 | dest = &cmd.cmd.slave_mask_addr; | |
2285 | src = &ucmd->cmd.slave_mask_addr; | |
2286 | break; | |
569b87b4 AJ |
2287 | case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg |
2288 | copy = 0; | |
2289 | src = NULL; | |
2290 | dest = NULL; | |
2291 | break; | |
f2d04231 RW |
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; | |
6ac50727 DO |
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; | |
124b4dcb DO |
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; | |
7f510b46 BS |
2312 | default: |
2313 | ret = -EINVAL; | |
2314 | goto bail; | |
2315 | } | |
2316 | ||
569b87b4 AJ |
2317 | if (copy) { |
2318 | if ((count - consumed) < copy) { | |
2319 | ret = -EINVAL; | |
2320 | goto bail; | |
2321 | } | |
7f510b46 | 2322 | |
569b87b4 AJ |
2323 | if (copy_from_user(dest, src, copy)) { |
2324 | ret = -EFAULT; | |
2325 | goto bail; | |
2326 | } | |
2327 | ||
2328 | consumed += copy; | |
7f510b46 BS |
2329 | } |
2330 | ||
7f510b46 | 2331 | pd = port_fp(fp); |
c97d27d8 BS |
2332 | if (!pd && cmd.type != __IPATH_CMD_USER_INIT && |
2333 | cmd.type != IPATH_CMD_ASSIGN_PORT) { | |
9929b0fb BS |
2334 | ret = -EINVAL; |
2335 | goto bail; | |
2336 | } | |
7f510b46 BS |
2337 | |
2338 | switch (cmd.type) { | |
c97d27d8 BS |
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 | /* backwards compatibility, get port first */ | |
2346 | ret = ipath_assign_port(fp, &cmd.cmd.user_info); | |
2347 | if (ret) | |
2348 | goto bail; | |
2349 | /* and fall through to current version. */ | |
7f510b46 | 2350 | case IPATH_CMD_USER_INIT: |
9929b0fb BS |
2351 | ret = ipath_do_user_init(fp, &cmd.cmd.user_info); |
2352 | if (ret) | |
7f510b46 BS |
2353 | goto bail; |
2354 | ret = ipath_get_base_info( | |
9929b0fb | 2355 | fp, (void __user *) (unsigned long) |
7f510b46 BS |
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: | |
9929b0fb | 2360 | ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl); |
7f510b46 BS |
2361 | break; |
2362 | case IPATH_CMD_PORT_INFO: | |
9929b0fb | 2363 | ret = ipath_port_info(pd, subport_fp(fp), |
7f510b46 BS |
2364 | (struct ipath_port_info __user *) |
2365 | (unsigned long) cmd.cmd.port_info); | |
2366 | break; | |
2367 | case IPATH_CMD_TID_UPDATE: | |
9929b0fb | 2368 | ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info); |
7f510b46 BS |
2369 | break; |
2370 | case IPATH_CMD_TID_FREE: | |
9929b0fb | 2371 | ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info); |
7f510b46 BS |
2372 | break; |
2373 | case IPATH_CMD_SET_PART_KEY: | |
2374 | ret = ipath_set_part_key(pd, cmd.cmd.part_key); | |
2375 | break; | |
c7e29ff1 | 2376 | case __IPATH_CMD_SLAVE_INFO: |
9929b0fb BS |
2377 | ret = ipath_get_slave_info(pd, |
2378 | (void __user *) (unsigned long) | |
2379 | cmd.cmd.slave_mask_addr); | |
2380 | break; | |
569b87b4 | 2381 | case IPATH_CMD_PIOAVAILUPD: |
c4b4d16e | 2382 | ipath_force_pio_avail_update(pd->port_dd); |
569b87b4 | 2383 | break; |
f2d04231 RW |
2384 | case IPATH_CMD_POLL_TYPE: |
2385 | pd->poll_type = cmd.cmd.poll_type; | |
2386 | break; | |
6ac50727 DO |
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; | |
124b4dcb DO |
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; | |
7f510b46 BS |
2404 | } |
2405 | ||
2406 | if (ret >= 0) | |
2407 | ret = consumed; | |
2408 | ||
2409 | bail: | |
2410 | return ret; | |
2411 | } | |
2412 | ||
124b4dcb DO |
2413 | static 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 | ||
7f510b46 BS |
2427 | static struct class *ipath_class; |
2428 | ||
2b8693c0 | 2429 | static int init_cdev(int minor, char *name, const struct file_operations *fops, |
f4e91eb4 | 2430 | struct cdev **cdevp, struct device **devp) |
7f510b46 BS |
2431 | { |
2432 | const dev_t dev = MKDEV(IPATH_MAJOR, minor); | |
2433 | struct cdev *cdev = NULL; | |
f4e91eb4 | 2434 | struct device *device = NULL; |
7f510b46 BS |
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 | ||
91bd418f | 2458 | device = device_create(ipath_class, NULL, dev, NULL, name); |
7f510b46 | 2459 | |
f4e91eb4 TJ |
2460 | if (IS_ERR(device)) { |
2461 | ret = PTR_ERR(device); | |
7f510b46 | 2462 | printk(KERN_ERR IPATH_DRV_NAME ": Could not create " |
f4e91eb4 | 2463 | "device for minor %d, %s (err %d)\n", |
7f510b46 BS |
2464 | minor, name, -ret); |
2465 | goto err_cdev; | |
2466 | } | |
2467 | ||
2468 | goto done; | |
2469 | ||
2470 | err_cdev: | |
2471 | cdev_del(cdev); | |
2472 | cdev = NULL; | |
2473 | ||
2474 | done: | |
2475 | if (ret >= 0) { | |
2476 | *cdevp = cdev; | |
f4e91eb4 | 2477 | *devp = device; |
7f510b46 BS |
2478 | } else { |
2479 | *cdevp = NULL; | |
f4e91eb4 | 2480 | *devp = NULL; |
7f510b46 BS |
2481 | } |
2482 | ||
2483 | return ret; | |
2484 | } | |
2485 | ||
2b8693c0 | 2486 | int ipath_cdev_init(int minor, char *name, const struct file_operations *fops, |
f4e91eb4 | 2487 | struct cdev **cdevp, struct device **devp) |
7f510b46 | 2488 | { |
f4e91eb4 | 2489 | return init_cdev(minor, name, fops, cdevp, devp); |
7f510b46 BS |
2490 | } |
2491 | ||
2492 | static void cleanup_cdev(struct cdev **cdevp, | |
f4e91eb4 | 2493 | struct device **devp) |
7f510b46 | 2494 | { |
f4e91eb4 | 2495 | struct device *dev = *devp; |
7f510b46 | 2496 | |
f4e91eb4 TJ |
2497 | if (dev) { |
2498 | device_unregister(dev); | |
2499 | *devp = NULL; | |
7f510b46 BS |
2500 | } |
2501 | ||
2502 | if (*cdevp) { | |
2503 | cdev_del(*cdevp); | |
2504 | *cdevp = NULL; | |
2505 | } | |
2506 | } | |
2507 | ||
2508 | void ipath_cdev_cleanup(struct cdev **cdevp, | |
f4e91eb4 | 2509 | struct device **devp) |
7f510b46 | 2510 | { |
f4e91eb4 | 2511 | cleanup_cdev(cdevp, devp); |
7f510b46 BS |
2512 | } |
2513 | ||
2514 | static struct cdev *wildcard_cdev; | |
f4e91eb4 | 2515 | static struct device *wildcard_dev; |
7f510b46 BS |
2516 | |
2517 | static const dev_t dev = MKDEV(IPATH_MAJOR, 0); | |
2518 | ||
2519 | static 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; | |
2540 | bail: | |
2541 | unregister_chrdev_region(dev, IPATH_NMINORS); | |
2542 | done: | |
2543 | return ret; | |
2544 | } | |
2545 | ||
2546 | static 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 | ||
2556 | static atomic_t user_count = ATOMIC_INIT(0); | |
2557 | static atomic_t user_setup = ATOMIC_INIT(0); | |
2558 | ||
2559 | int 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 | } | |
7f510b46 | 2571 | ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, |
f4e91eb4 | 2572 | &wildcard_dev); |
7f510b46 BS |
2573 | if (ret < 0) { |
2574 | ipath_dev_err(dd, "Could not create wildcard " | |
2575 | "minor: error %d\n", -ret); | |
0fd41363 | 2576 | goto bail_user; |
7f510b46 BS |
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, | |
f4e91eb4 | 2585 | &dd->user_cdev, &dd->user_dev); |
7f510b46 BS |
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 | ||
0fd41363 | 2592 | bail_user: |
7f510b46 BS |
2593 | user_cleanup(); |
2594 | bail: | |
2595 | return ret; | |
2596 | } | |
2597 | ||
a2acb2ff | 2598 | void ipath_user_remove(struct ipath_devdata *dd) |
7f510b46 | 2599 | { |
f4e91eb4 | 2600 | cleanup_cdev(&dd->user_cdev, &dd->user_dev); |
7f510b46 BS |
2601 | |
2602 | if (atomic_dec_return(&user_count) == 0) { | |
2603 | if (atomic_read(&user_setup) == 0) | |
2604 | goto bail; | |
2605 | ||
f4e91eb4 | 2606 | cleanup_cdev(&wildcard_cdev, &wildcard_dev); |
7f510b46 BS |
2607 | user_cleanup(); |
2608 | ||
2609 | atomic_set(&user_setup, 0); | |
2610 | } | |
2611 | bail: | |
2612 | return; | |
2613 | } |