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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> | |
b108d976 | 38 | #include <linux/export.h> |
7f510b46 | 39 | #include <linux/vmalloc.h> |
5a0e3ad6 | 40 | #include <linux/slab.h> |
124b4dcb DO |
41 | #include <linux/highmem.h> |
42 | #include <linux/io.h> | |
a27bb332 | 43 | #include <linux/aio.h> |
124b4dcb | 44 | #include <linux/jiffies.h> |
57631811 | 45 | #include <linux/cpu.h> |
7f510b46 BS |
46 | #include <asm/pgtable.h> |
47 | ||
48 | #include "ipath_kernel.h" | |
27b678dd | 49 | #include "ipath_common.h" |
124b4dcb | 50 | #include "ipath_user_sdma.h" |
7f510b46 BS |
51 | |
52 | static int ipath_open(struct inode *, struct file *); | |
53 | static int ipath_close(struct inode *, struct file *); | |
54 | static ssize_t ipath_write(struct file *, const char __user *, size_t, | |
55 | loff_t *); | |
124b4dcb DO |
56 | static ssize_t ipath_writev(struct kiocb *, const struct iovec *, |
57 | unsigned long , loff_t); | |
7f510b46 BS |
58 | static unsigned int ipath_poll(struct file *, struct poll_table_struct *); |
59 | static int ipath_mmap(struct file *, struct vm_area_struct *); | |
60 | ||
2b8693c0 | 61 | static const struct file_operations ipath_file_ops = { |
7f510b46 BS |
62 | .owner = THIS_MODULE, |
63 | .write = ipath_write, | |
124b4dcb | 64 | .aio_write = ipath_writev, |
7f510b46 BS |
65 | .open = ipath_open, |
66 | .release = ipath_close, | |
67 | .poll = ipath_poll, | |
6038f373 AB |
68 | .mmap = ipath_mmap, |
69 | .llseek = noop_llseek, | |
7f510b46 BS |
70 | }; |
71 | ||
0a5a83cf RC |
72 | /* |
73 | * Convert kernel virtual addresses to physical addresses so they don't | |
74 | * potentially conflict with the chip addresses used as mmap offsets. | |
75 | * It doesn't really matter what mmap offset we use as long as we can | |
76 | * interpret it correctly. | |
77 | */ | |
78 | static u64 cvt_kvaddr(void *p) | |
79 | { | |
80 | struct page *page; | |
81 | u64 paddr = 0; | |
82 | ||
83 | page = vmalloc_to_page(p); | |
84 | if (page) | |
85 | paddr = page_to_pfn(page) << PAGE_SHIFT; | |
86 | ||
87 | return paddr; | |
88 | } | |
89 | ||
9929b0fb | 90 | static int ipath_get_base_info(struct file *fp, |
7f510b46 BS |
91 | void __user *ubase, size_t ubase_size) |
92 | { | |
9929b0fb | 93 | struct ipath_portdata *pd = port_fp(fp); |
7f510b46 BS |
94 | int ret = 0; |
95 | struct ipath_base_info *kinfo = NULL; | |
96 | struct ipath_devdata *dd = pd->port_dd; | |
9929b0fb BS |
97 | unsigned subport_cnt; |
98 | int shared, master; | |
99 | size_t sz; | |
100 | ||
101 | subport_cnt = pd->port_subport_cnt; | |
102 | if (!subport_cnt) { | |
103 | shared = 0; | |
104 | master = 0; | |
105 | subport_cnt = 1; | |
106 | } else { | |
107 | shared = 1; | |
108 | master = !subport_fp(fp); | |
109 | } | |
7f510b46 | 110 | |
9929b0fb BS |
111 | sz = sizeof(*kinfo); |
112 | /* If port sharing is not requested, allow the old size structure */ | |
113 | if (!shared) | |
c7e29ff1 | 114 | sz -= 7 * sizeof(u64); |
9929b0fb | 115 | if (ubase_size < sz) { |
7f510b46 | 116 | ipath_cdbg(PROC, |
9929b0fb BS |
117 | "Base size %zu, need %zu (version mismatch?)\n", |
118 | ubase_size, sz); | |
7f510b46 BS |
119 | ret = -EINVAL; |
120 | goto bail; | |
121 | } | |
122 | ||
123 | kinfo = kzalloc(sizeof(*kinfo), GFP_KERNEL); | |
124 | if (kinfo == NULL) { | |
125 | ret = -ENOMEM; | |
126 | goto bail; | |
127 | } | |
128 | ||
129 | ret = dd->ipath_f_get_base_info(pd, kinfo); | |
130 | if (ret < 0) | |
131 | goto bail; | |
132 | ||
133 | kinfo->spi_rcvhdr_cnt = dd->ipath_rcvhdrcnt; | |
134 | kinfo->spi_rcvhdrent_size = dd->ipath_rcvhdrentsize; | |
135 | kinfo->spi_tidegrcnt = dd->ipath_rcvegrcnt; | |
136 | kinfo->spi_rcv_egrbufsize = dd->ipath_rcvegrbufsize; | |
137 | /* | |
138 | * have to mmap whole thing | |
139 | */ | |
140 | kinfo->spi_rcv_egrbuftotlen = | |
141 | pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; | |
142 | kinfo->spi_rcv_egrperchunk = pd->port_rcvegrbufs_perchunk; | |
143 | kinfo->spi_rcv_egrchunksize = kinfo->spi_rcv_egrbuftotlen / | |
144 | pd->port_rcvegrbuf_chunks; | |
9929b0fb BS |
145 | kinfo->spi_tidcnt = dd->ipath_rcvtidcnt / subport_cnt; |
146 | if (master) | |
147 | kinfo->spi_tidcnt += dd->ipath_rcvtidcnt % subport_cnt; | |
7f510b46 BS |
148 | /* |
149 | * for this use, may be ipath_cfgports summed over all chips that | |
150 | * are are configured and present | |
151 | */ | |
152 | kinfo->spi_nports = dd->ipath_cfgports; | |
153 | /* unit (chip/board) our port is on */ | |
154 | kinfo->spi_unit = dd->ipath_unit; | |
155 | /* for now, only a single page */ | |
156 | kinfo->spi_tid_maxsize = PAGE_SIZE; | |
157 | ||
158 | /* | |
159 | * Doing this per port, and based on the skip value, etc. This has | |
160 | * to be the actual buffer size, since the protocol code treats it | |
161 | * as an array. | |
162 | * | |
163 | * These have to be set to user addresses in the user code via mmap. | |
164 | * These values are used on return to user code for the mmap target | |
165 | * addresses only. For 32 bit, same 44 bit address problem, so use | |
166 | * the physical address, not virtual. Before 2.6.11, using the | |
167 | * page_address() macro worked, but in 2.6.11, even that returns the | |
168 | * full 64 bit address (upper bits all 1's). So far, using the | |
169 | * physical addresses (or chip offsets, for chip mapping) works, but | |
9929b0fb BS |
170 | * no doubt some future kernel release will change that, and we'll be |
171 | * on to yet another method of dealing with this. | |
7f510b46 BS |
172 | */ |
173 | kinfo->spi_rcvhdr_base = (u64) pd->port_rcvhdrq_phys; | |
9929b0fb | 174 | kinfo->spi_rcvhdr_tailaddr = (u64) pd->port_rcvhdrqtailaddr_phys; |
7f510b46 BS |
175 | kinfo->spi_rcv_egrbufs = (u64) pd->port_rcvegr_phys; |
176 | kinfo->spi_pioavailaddr = (u64) dd->ipath_pioavailregs_phys; | |
177 | kinfo->spi_status = (u64) kinfo->spi_pioavailaddr + | |
178 | (void *) dd->ipath_statusp - | |
179 | (void *) dd->ipath_pioavailregs_dma; | |
9929b0fb | 180 | if (!shared) { |
e2ab41ca | 181 | kinfo->spi_piocnt = pd->port_piocnt; |
9929b0fb BS |
182 | kinfo->spi_piobufbase = (u64) pd->port_piobufs; |
183 | kinfo->__spi_uregbase = (u64) dd->ipath_uregbase + | |
a18e26ae | 184 | dd->ipath_ureg_align * pd->port_port; |
9929b0fb | 185 | } else if (master) { |
e2ab41ca DO |
186 | kinfo->spi_piocnt = (pd->port_piocnt / subport_cnt) + |
187 | (pd->port_piocnt % subport_cnt); | |
9929b0fb BS |
188 | /* Master's PIO buffers are after all the slave's */ |
189 | kinfo->spi_piobufbase = (u64) pd->port_piobufs + | |
190 | dd->ipath_palign * | |
e2ab41ca | 191 | (pd->port_piocnt - kinfo->spi_piocnt); |
9929b0fb BS |
192 | } else { |
193 | unsigned slave = subport_fp(fp) - 1; | |
7f510b46 | 194 | |
e2ab41ca | 195 | kinfo->spi_piocnt = pd->port_piocnt / subport_cnt; |
9929b0fb BS |
196 | kinfo->spi_piobufbase = (u64) pd->port_piobufs + |
197 | dd->ipath_palign * kinfo->spi_piocnt * slave; | |
c7e29ff1 | 198 | } |
1d7c2e52 | 199 | |
c7e29ff1 MD |
200 | if (shared) { |
201 | kinfo->spi_port_uregbase = (u64) dd->ipath_uregbase + | |
a18e26ae | 202 | dd->ipath_ureg_align * pd->port_port; |
c7e29ff1 MD |
203 | kinfo->spi_port_rcvegrbuf = kinfo->spi_rcv_egrbufs; |
204 | kinfo->spi_port_rcvhdr_base = kinfo->spi_rcvhdr_base; | |
205 | kinfo->spi_port_rcvhdr_tailaddr = kinfo->spi_rcvhdr_tailaddr; | |
206 | ||
0a5a83cf | 207 | kinfo->__spi_uregbase = cvt_kvaddr(pd->subport_uregbase + |
c7e29ff1 | 208 | PAGE_SIZE * subport_fp(fp)); |
9929b0fb | 209 | |
0a5a83cf | 210 | kinfo->spi_rcvhdr_base = cvt_kvaddr(pd->subport_rcvhdr_base + |
c7e29ff1 | 211 | pd->port_rcvhdrq_size * subport_fp(fp)); |
947d7617 | 212 | kinfo->spi_rcvhdr_tailaddr = 0; |
0a5a83cf | 213 | kinfo->spi_rcv_egrbufs = cvt_kvaddr(pd->subport_rcvegrbuf + |
c7e29ff1 MD |
214 | pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size * |
215 | subport_fp(fp)); | |
216 | ||
217 | kinfo->spi_subport_uregbase = | |
218 | cvt_kvaddr(pd->subport_uregbase); | |
219 | kinfo->spi_subport_rcvegrbuf = | |
220 | cvt_kvaddr(pd->subport_rcvegrbuf); | |
221 | kinfo->spi_subport_rcvhdr_base = | |
222 | cvt_kvaddr(pd->subport_rcvhdr_base); | |
223 | ipath_cdbg(PROC, "port %u flags %x %llx %llx %llx\n", | |
224 | kinfo->spi_port, kinfo->spi_runtime_flags, | |
225 | (unsigned long long) kinfo->spi_subport_uregbase, | |
226 | (unsigned long long) kinfo->spi_subport_rcvegrbuf, | |
227 | (unsigned long long) kinfo->spi_subport_rcvhdr_base); | |
9929b0fb BS |
228 | } |
229 | ||
1bf7724e DO |
230 | /* |
231 | * All user buffers are 2KB buffers. If we ever support | |
232 | * giving 4KB buffers to user processes, this will need some | |
233 | * work. | |
234 | */ | |
235 | kinfo->spi_pioindex = (kinfo->spi_piobufbase - | |
236 | (dd->ipath_piobufbase & 0xffffffff)) / dd->ipath_palign; | |
7f510b46 BS |
237 | kinfo->spi_pioalign = dd->ipath_palign; |
238 | ||
239 | kinfo->spi_qpair = IPATH_KD_QP; | |
826d8010 DO |
240 | /* |
241 | * user mode PIO buffers are always 2KB, even when 4KB can | |
242 | * be received, and sent via the kernel; this is ibmaxlen | |
243 | * for 2K MTU. | |
244 | */ | |
245 | kinfo->spi_piosize = dd->ipath_piosize2k - 2 * sizeof(u32); | |
7f510b46 BS |
246 | kinfo->spi_mtu = dd->ipath_ibmaxlen; /* maxlen, not ibmtu */ |
247 | kinfo->spi_port = pd->port_port; | |
9929b0fb | 248 | kinfo->spi_subport = subport_fp(fp); |
eaf6733b | 249 | kinfo->spi_sw_version = IPATH_KERN_SWVERSION; |
7f510b46 BS |
250 | kinfo->spi_hw_version = dd->ipath_revision; |
251 | ||
9929b0fb BS |
252 | if (master) { |
253 | kinfo->spi_runtime_flags |= IPATH_RUNTIME_MASTER; | |
9929b0fb BS |
254 | } |
255 | ||
c7e29ff1 MD |
256 | sz = (ubase_size < sizeof(*kinfo)) ? ubase_size : sizeof(*kinfo); |
257 | if (copy_to_user(ubase, kinfo, sz)) | |
7f510b46 BS |
258 | ret = -EFAULT; |
259 | ||
260 | bail: | |
261 | kfree(kinfo); | |
262 | return ret; | |
263 | } | |
264 | ||
265 | /** | |
266 | * ipath_tid_update - update a port TID | |
267 | * @pd: the port | |
9929b0fb | 268 | * @fp: the ipath device file |
7f510b46 BS |
269 | * @ti: the TID information |
270 | * | |
271 | * The new implementation as of Oct 2004 is that the driver assigns | |
272 | * the tid and returns it to the caller. To make it easier to | |
273 | * catch bugs, and to reduce search time, we keep a cursor for | |
274 | * each port, walking the shadow tid array to find one that's not | |
275 | * in use. | |
276 | * | |
277 | * For now, if we can't allocate the full list, we fail, although | |
278 | * in the long run, we'll allocate as many as we can, and the | |
279 | * caller will deal with that by trying the remaining pages later. | |
280 | * That means that when we fail, we have to mark the tids as not in | |
281 | * use again, in our shadow copy. | |
282 | * | |
283 | * It's up to the caller to free the tids when they are done. | |
284 | * We'll unlock the pages as they free them. | |
285 | * | |
286 | * Also, right now we are locking one page at a time, but since | |
287 | * the intended use of this routine is for a single group of | |
288 | * virtually contiguous pages, that should change to improve | |
289 | * performance. | |
290 | */ | |
9929b0fb | 291 | static int ipath_tid_update(struct ipath_portdata *pd, struct file *fp, |
7f510b46 BS |
292 | const struct ipath_tid_info *ti) |
293 | { | |
294 | int ret = 0, ntids; | |
9929b0fb | 295 | u32 tid, porttid, cnt, i, tidcnt, tidoff; |
7f510b46 BS |
296 | u16 *tidlist; |
297 | struct ipath_devdata *dd = pd->port_dd; | |
298 | u64 physaddr; | |
299 | unsigned long vaddr; | |
300 | u64 __iomem *tidbase; | |
301 | unsigned long tidmap[8]; | |
302 | struct page **pagep = NULL; | |
9929b0fb | 303 | unsigned subport = subport_fp(fp); |
7f510b46 BS |
304 | |
305 | if (!dd->ipath_pageshadow) { | |
306 | ret = -ENOMEM; | |
307 | goto done; | |
308 | } | |
309 | ||
310 | cnt = ti->tidcnt; | |
311 | if (!cnt) { | |
312 | ipath_dbg("After copyin, tidcnt 0, tidlist %llx\n", | |
313 | (unsigned long long) ti->tidlist); | |
314 | /* | |
315 | * Should we treat as success? likely a bug | |
316 | */ | |
317 | ret = -EFAULT; | |
318 | goto done; | |
319 | } | |
9929b0fb BS |
320 | porttid = pd->port_port * dd->ipath_rcvtidcnt; |
321 | if (!pd->port_subport_cnt) { | |
322 | tidcnt = dd->ipath_rcvtidcnt; | |
323 | tid = pd->port_tidcursor; | |
324 | tidoff = 0; | |
325 | } else if (!subport) { | |
326 | tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + | |
327 | (dd->ipath_rcvtidcnt % pd->port_subport_cnt); | |
328 | tidoff = dd->ipath_rcvtidcnt - tidcnt; | |
329 | porttid += tidoff; | |
330 | tid = tidcursor_fp(fp); | |
331 | } else { | |
332 | tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; | |
333 | tidoff = tidcnt * (subport - 1); | |
334 | porttid += tidoff; | |
335 | tid = tidcursor_fp(fp); | |
336 | } | |
337 | if (cnt > tidcnt) { | |
7f510b46 BS |
338 | /* make sure it all fits in port_tid_pg_list */ |
339 | dev_info(&dd->pcidev->dev, "Process tried to allocate %u " | |
340 | "TIDs, only trying max (%u)\n", cnt, tidcnt); | |
341 | cnt = tidcnt; | |
342 | } | |
9929b0fb BS |
343 | pagep = &((struct page **) pd->port_tid_pg_list)[tidoff]; |
344 | tidlist = &((u16 *) &pagep[dd->ipath_rcvtidcnt])[tidoff]; | |
7f510b46 BS |
345 | |
346 | memset(tidmap, 0, sizeof(tidmap)); | |
7f510b46 | 347 | /* before decrement; chip actual # */ |
7f510b46 BS |
348 | ntids = tidcnt; |
349 | tidbase = (u64 __iomem *) (((char __iomem *) dd->ipath_kregbase) + | |
350 | dd->ipath_rcvtidbase + | |
351 | porttid * sizeof(*tidbase)); | |
352 | ||
353 | ipath_cdbg(VERBOSE, "Port%u %u tids, cursor %u, tidbase %p\n", | |
354 | pd->port_port, cnt, tid, tidbase); | |
355 | ||
356 | /* virtual address of first page in transfer */ | |
357 | vaddr = ti->tidvaddr; | |
358 | if (!access_ok(VERIFY_WRITE, (void __user *) vaddr, | |
359 | cnt * PAGE_SIZE)) { | |
360 | ipath_dbg("Fail vaddr %p, %u pages, !access_ok\n", | |
361 | (void *)vaddr, cnt); | |
362 | ret = -EFAULT; | |
363 | goto done; | |
364 | } | |
365 | ret = ipath_get_user_pages(vaddr, cnt, pagep); | |
366 | if (ret) { | |
367 | if (ret == -EBUSY) { | |
368 | ipath_dbg("Failed to lock addr %p, %u pages " | |
369 | "(already locked)\n", | |
370 | (void *) vaddr, cnt); | |
371 | /* | |
372 | * for now, continue, and see what happens but with | |
373 | * the new implementation, this should never happen, | |
374 | * unless perhaps the user has mpin'ed the pages | |
375 | * themselves (something we need to test) | |
376 | */ | |
377 | ret = 0; | |
378 | } else { | |
379 | dev_info(&dd->pcidev->dev, | |
380 | "Failed to lock addr %p, %u pages: " | |
381 | "errno %d\n", (void *) vaddr, cnt, -ret); | |
382 | goto done; | |
383 | } | |
384 | } | |
385 | for (i = 0; i < cnt; i++, vaddr += PAGE_SIZE) { | |
386 | for (; ntids--; tid++) { | |
387 | if (tid == tidcnt) | |
388 | tid = 0; | |
389 | if (!dd->ipath_pageshadow[porttid + tid]) | |
390 | break; | |
391 | } | |
392 | if (ntids < 0) { | |
393 | /* | |
394 | * oops, wrapped all the way through their TIDs, | |
395 | * and didn't have enough free; see comments at | |
396 | * start of routine | |
397 | */ | |
398 | ipath_dbg("Not enough free TIDs for %u pages " | |
399 | "(index %d), failing\n", cnt, i); | |
400 | i--; /* last tidlist[i] not filled in */ | |
401 | ret = -ENOMEM; | |
402 | break; | |
403 | } | |
9929b0fb | 404 | tidlist[i] = tid + tidoff; |
7f510b46 | 405 | ipath_cdbg(VERBOSE, "Updating idx %u to TID %u, " |
9929b0fb | 406 | "vaddr %lx\n", i, tid + tidoff, vaddr); |
7f510b46 BS |
407 | /* we "know" system pages and TID pages are same size */ |
408 | dd->ipath_pageshadow[porttid + tid] = pagep[i]; | |
1fd3b40f BS |
409 | dd->ipath_physshadow[porttid + tid] = ipath_map_page( |
410 | dd->pcidev, pagep[i], 0, PAGE_SIZE, | |
411 | PCI_DMA_FROMDEVICE); | |
7f510b46 BS |
412 | /* |
413 | * don't need atomic or it's overhead | |
414 | */ | |
415 | __set_bit(tid, tidmap); | |
1fd3b40f | 416 | physaddr = dd->ipath_physshadow[porttid + tid]; |
7f510b46 BS |
417 | ipath_stats.sps_pagelocks++; |
418 | ipath_cdbg(VERBOSE, | |
419 | "TID %u, vaddr %lx, physaddr %llx pgp %p\n", | |
420 | tid, vaddr, (unsigned long long) physaddr, | |
421 | pagep[i]); | |
f716cdfe JE |
422 | dd->ipath_f_put_tid(dd, &tidbase[tid], RCVHQ_RCV_TYPE_EXPECTED, |
423 | physaddr); | |
7f510b46 BS |
424 | /* |
425 | * don't check this tid in ipath_portshadow, since we | |
426 | * just filled it in; start with the next one. | |
427 | */ | |
428 | tid++; | |
429 | } | |
430 | ||
431 | if (ret) { | |
432 | u32 limit; | |
433 | cleanup: | |
434 | /* jump here if copy out of updated info failed... */ | |
435 | ipath_dbg("After failure (ret=%d), undo %d of %d entries\n", | |
436 | -ret, i, cnt); | |
437 | /* same code that's in ipath_free_tid() */ | |
438 | limit = sizeof(tidmap) * BITS_PER_BYTE; | |
439 | if (limit > tidcnt) | |
440 | /* just in case size changes in future */ | |
441 | limit = tidcnt; | |
442 | tid = find_first_bit((const unsigned long *)tidmap, limit); | |
443 | for (; tid < limit; tid++) { | |
444 | if (!test_bit(tid, tidmap)) | |
445 | continue; | |
446 | if (dd->ipath_pageshadow[porttid + tid]) { | |
447 | ipath_cdbg(VERBOSE, "Freeing TID %u\n", | |
448 | tid); | |
f716cdfe JE |
449 | dd->ipath_f_put_tid(dd, &tidbase[tid], |
450 | RCVHQ_RCV_TYPE_EXPECTED, | |
7f510b46 | 451 | dd->ipath_tidinvalid); |
1fd3b40f BS |
452 | pci_unmap_page(dd->pcidev, |
453 | dd->ipath_physshadow[porttid + tid], | |
454 | PAGE_SIZE, PCI_DMA_FROMDEVICE); | |
7f510b46 BS |
455 | dd->ipath_pageshadow[porttid + tid] = NULL; |
456 | ipath_stats.sps_pageunlocks++; | |
457 | } | |
458 | } | |
459 | ipath_release_user_pages(pagep, cnt); | |
460 | } else { | |
461 | /* | |
462 | * Copy the updated array, with ipath_tid's filled in, back | |
463 | * to user. Since we did the copy in already, this "should | |
464 | * never fail" If it does, we have to clean up... | |
465 | */ | |
466 | if (copy_to_user((void __user *) | |
467 | (unsigned long) ti->tidlist, | |
468 | tidlist, cnt * sizeof(*tidlist))) { | |
469 | ret = -EFAULT; | |
470 | goto cleanup; | |
471 | } | |
472 | if (copy_to_user((void __user *) (unsigned long) ti->tidmap, | |
473 | tidmap, sizeof tidmap)) { | |
474 | ret = -EFAULT; | |
475 | goto cleanup; | |
476 | } | |
477 | if (tid == tidcnt) | |
478 | tid = 0; | |
9929b0fb BS |
479 | if (!pd->port_subport_cnt) |
480 | pd->port_tidcursor = tid; | |
481 | else | |
482 | tidcursor_fp(fp) = tid; | |
7f510b46 BS |
483 | } |
484 | ||
485 | done: | |
486 | if (ret) | |
487 | ipath_dbg("Failed to map %u TID pages, failing with %d\n", | |
488 | ti->tidcnt, -ret); | |
489 | return ret; | |
490 | } | |
491 | ||
492 | /** | |
493 | * ipath_tid_free - free a port TID | |
494 | * @pd: the port | |
9929b0fb | 495 | * @subport: the subport |
7f510b46 BS |
496 | * @ti: the TID info |
497 | * | |
498 | * right now we are unlocking one page at a time, but since | |
499 | * the intended use of this routine is for a single group of | |
500 | * virtually contiguous pages, that should change to improve | |
501 | * performance. We check that the TID is in range for this port | |
502 | * but otherwise don't check validity; if user has an error and | |
503 | * frees the wrong tid, it's only their own data that can thereby | |
504 | * be corrupted. We do check that the TID was in use, for sanity | |
505 | * We always use our idea of the saved address, not the address that | |
506 | * they pass in to us. | |
507 | */ | |
508 | ||
9929b0fb | 509 | static int ipath_tid_free(struct ipath_portdata *pd, unsigned subport, |
7f510b46 BS |
510 | const struct ipath_tid_info *ti) |
511 | { | |
512 | int ret = 0; | |
513 | u32 tid, porttid, cnt, limit, tidcnt; | |
514 | struct ipath_devdata *dd = pd->port_dd; | |
515 | u64 __iomem *tidbase; | |
516 | unsigned long tidmap[8]; | |
517 | ||
518 | if (!dd->ipath_pageshadow) { | |
519 | ret = -ENOMEM; | |
520 | goto done; | |
521 | } | |
522 | ||
523 | if (copy_from_user(tidmap, (void __user *)(unsigned long)ti->tidmap, | |
524 | sizeof tidmap)) { | |
525 | ret = -EFAULT; | |
526 | goto done; | |
527 | } | |
528 | ||
529 | porttid = pd->port_port * dd->ipath_rcvtidcnt; | |
9929b0fb BS |
530 | if (!pd->port_subport_cnt) |
531 | tidcnt = dd->ipath_rcvtidcnt; | |
532 | else if (!subport) { | |
533 | tidcnt = (dd->ipath_rcvtidcnt / pd->port_subport_cnt) + | |
534 | (dd->ipath_rcvtidcnt % pd->port_subport_cnt); | |
535 | porttid += dd->ipath_rcvtidcnt - tidcnt; | |
536 | } else { | |
537 | tidcnt = dd->ipath_rcvtidcnt / pd->port_subport_cnt; | |
538 | porttid += tidcnt * (subport - 1); | |
539 | } | |
7f510b46 BS |
540 | tidbase = (u64 __iomem *) ((char __iomem *)(dd->ipath_kregbase) + |
541 | dd->ipath_rcvtidbase + | |
542 | porttid * sizeof(*tidbase)); | |
543 | ||
7f510b46 BS |
544 | limit = sizeof(tidmap) * BITS_PER_BYTE; |
545 | if (limit > tidcnt) | |
546 | /* just in case size changes in future */ | |
547 | limit = tidcnt; | |
548 | tid = find_first_bit(tidmap, limit); | |
549 | ipath_cdbg(VERBOSE, "Port%u free %u tids; first bit (max=%d) " | |
550 | "set is %d, porttid %u\n", pd->port_port, ti->tidcnt, | |
551 | limit, tid, porttid); | |
552 | for (cnt = 0; tid < limit; tid++) { | |
553 | /* | |
554 | * small optimization; if we detect a run of 3 or so without | |
555 | * any set, use find_first_bit again. That's mainly to | |
556 | * accelerate the case where we wrapped, so we have some at | |
557 | * the beginning, and some at the end, and a big gap | |
558 | * in the middle. | |
559 | */ | |
560 | if (!test_bit(tid, tidmap)) | |
561 | continue; | |
562 | cnt++; | |
563 | if (dd->ipath_pageshadow[porttid + tid]) { | |
3ac8c70f DO |
564 | struct page *p; |
565 | p = dd->ipath_pageshadow[porttid + tid]; | |
566 | dd->ipath_pageshadow[porttid + tid] = NULL; | |
7f510b46 | 567 | ipath_cdbg(VERBOSE, "PID %u freeing TID %u\n", |
40d97692 | 568 | pid_nr(pd->port_pid), tid); |
f716cdfe JE |
569 | dd->ipath_f_put_tid(dd, &tidbase[tid], |
570 | RCVHQ_RCV_TYPE_EXPECTED, | |
7f510b46 | 571 | dd->ipath_tidinvalid); |
1fd3b40f BS |
572 | pci_unmap_page(dd->pcidev, |
573 | dd->ipath_physshadow[porttid + tid], | |
574 | PAGE_SIZE, PCI_DMA_FROMDEVICE); | |
3ac8c70f | 575 | ipath_release_user_pages(&p, 1); |
7f510b46 BS |
576 | ipath_stats.sps_pageunlocks++; |
577 | } else | |
578 | ipath_dbg("Unused tid %u, ignoring\n", tid); | |
579 | } | |
580 | if (cnt != ti->tidcnt) | |
581 | ipath_dbg("passed in tidcnt %d, only %d bits set in map\n", | |
582 | ti->tidcnt, cnt); | |
583 | done: | |
584 | if (ret) | |
585 | ipath_dbg("Failed to unmap %u TID pages, failing with %d\n", | |
586 | ti->tidcnt, -ret); | |
587 | return ret; | |
588 | } | |
589 | ||
590 | /** | |
591 | * ipath_set_part_key - set a partition key | |
592 | * @pd: the port | |
593 | * @key: the key | |
594 | * | |
595 | * We can have up to 4 active at a time (other than the default, which is | |
596 | * always allowed). This is somewhat tricky, since multiple ports may set | |
597 | * the same key, so we reference count them, and clean up at exit. All 4 | |
598 | * partition keys are packed into a single infinipath register. It's an | |
599 | * error for a process to set the same pkey multiple times. We provide no | |
600 | * mechanism to de-allocate a pkey at this time, we may eventually need to | |
601 | * do that. I've used the atomic operations, and no locking, and only make | |
602 | * a single pass through what's available. This should be more than | |
603 | * adequate for some time. I'll think about spinlocks or the like if and as | |
604 | * it's necessary. | |
605 | */ | |
606 | static int ipath_set_part_key(struct ipath_portdata *pd, u16 key) | |
607 | { | |
608 | struct ipath_devdata *dd = pd->port_dd; | |
609 | int i, any = 0, pidx = -1; | |
610 | u16 lkey = key & 0x7FFF; | |
611 | int ret; | |
612 | ||
27b678dd | 613 | if (lkey == (IPATH_DEFAULT_P_KEY & 0x7FFF)) { |
7f510b46 BS |
614 | /* nothing to do; this key always valid */ |
615 | ret = 0; | |
616 | goto bail; | |
617 | } | |
618 | ||
619 | ipath_cdbg(VERBOSE, "p%u try to set pkey %hx, current keys " | |
620 | "%hx:%x %hx:%x %hx:%x %hx:%x\n", | |
621 | pd->port_port, key, dd->ipath_pkeys[0], | |
622 | atomic_read(&dd->ipath_pkeyrefs[0]), dd->ipath_pkeys[1], | |
623 | atomic_read(&dd->ipath_pkeyrefs[1]), dd->ipath_pkeys[2], | |
624 | atomic_read(&dd->ipath_pkeyrefs[2]), dd->ipath_pkeys[3], | |
625 | atomic_read(&dd->ipath_pkeyrefs[3])); | |
626 | ||
627 | if (!lkey) { | |
628 | ipath_cdbg(PROC, "p%u tries to set key 0, not allowed\n", | |
629 | pd->port_port); | |
630 | ret = -EINVAL; | |
631 | goto bail; | |
632 | } | |
633 | ||
634 | /* | |
635 | * Set the full membership bit, because it has to be | |
636 | * set in the register or the packet, and it seems | |
637 | * cleaner to set in the register than to force all | |
638 | * callers to set it. (see bug 4331) | |
639 | */ | |
640 | key |= 0x8000; | |
641 | ||
642 | for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { | |
643 | if (!pd->port_pkeys[i] && pidx == -1) | |
644 | pidx = i; | |
645 | if (pd->port_pkeys[i] == key) { | |
646 | ipath_cdbg(VERBOSE, "p%u tries to set same pkey " | |
647 | "(%x) more than once\n", | |
648 | pd->port_port, key); | |
649 | ret = -EEXIST; | |
650 | goto bail; | |
651 | } | |
652 | } | |
653 | if (pidx == -1) { | |
654 | ipath_dbg("All pkeys for port %u already in use, " | |
655 | "can't set %x\n", pd->port_port, key); | |
656 | ret = -EBUSY; | |
657 | goto bail; | |
658 | } | |
659 | for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { | |
660 | if (!dd->ipath_pkeys[i]) { | |
661 | any++; | |
662 | continue; | |
663 | } | |
664 | if (dd->ipath_pkeys[i] == key) { | |
665 | atomic_t *pkrefs = &dd->ipath_pkeyrefs[i]; | |
666 | ||
667 | if (atomic_inc_return(pkrefs) > 1) { | |
668 | pd->port_pkeys[pidx] = key; | |
669 | ipath_cdbg(VERBOSE, "p%u set key %x " | |
670 | "matches #%d, count now %d\n", | |
671 | pd->port_port, key, i, | |
672 | atomic_read(pkrefs)); | |
673 | ret = 0; | |
674 | goto bail; | |
675 | } else { | |
676 | /* | |
677 | * lost race, decrement count, catch below | |
678 | */ | |
679 | atomic_dec(pkrefs); | |
680 | ipath_cdbg(VERBOSE, "Lost race, count was " | |
681 | "0, after dec, it's %d\n", | |
682 | atomic_read(pkrefs)); | |
683 | any++; | |
684 | } | |
685 | } | |
686 | if ((dd->ipath_pkeys[i] & 0x7FFF) == lkey) { | |
687 | /* | |
688 | * It makes no sense to have both the limited and | |
689 | * full membership PKEY set at the same time since | |
690 | * the unlimited one will disable the limited one. | |
691 | */ | |
692 | ret = -EEXIST; | |
693 | goto bail; | |
694 | } | |
695 | } | |
696 | if (!any) { | |
697 | ipath_dbg("port %u, all pkeys already in use, " | |
698 | "can't set %x\n", pd->port_port, key); | |
699 | ret = -EBUSY; | |
700 | goto bail; | |
701 | } | |
702 | for (any = i = 0; i < ARRAY_SIZE(dd->ipath_pkeys); i++) { | |
703 | if (!dd->ipath_pkeys[i] && | |
704 | atomic_inc_return(&dd->ipath_pkeyrefs[i]) == 1) { | |
705 | u64 pkey; | |
706 | ||
707 | /* for ipathstats, etc. */ | |
708 | ipath_stats.sps_pkeys[i] = lkey; | |
709 | pd->port_pkeys[pidx] = dd->ipath_pkeys[i] = key; | |
710 | pkey = | |
711 | (u64) dd->ipath_pkeys[0] | | |
712 | ((u64) dd->ipath_pkeys[1] << 16) | | |
713 | ((u64) dd->ipath_pkeys[2] << 32) | | |
714 | ((u64) dd->ipath_pkeys[3] << 48); | |
715 | ipath_cdbg(PROC, "p%u set key %x in #%d, " | |
716 | "portidx %d, new pkey reg %llx\n", | |
717 | pd->port_port, key, i, pidx, | |
718 | (unsigned long long) pkey); | |
719 | ipath_write_kreg( | |
720 | dd, dd->ipath_kregs->kr_partitionkey, pkey); | |
721 | ||
722 | ret = 0; | |
723 | goto bail; | |
724 | } | |
725 | } | |
726 | ipath_dbg("port %u, all pkeys already in use 2nd pass, " | |
727 | "can't set %x\n", pd->port_port, key); | |
728 | ret = -EBUSY; | |
729 | ||
730 | bail: | |
731 | return ret; | |
732 | } | |
733 | ||
734 | /** | |
735 | * ipath_manage_rcvq - manage a port's receive queue | |
736 | * @pd: the port | |
9929b0fb | 737 | * @subport: the subport |
7f510b46 BS |
738 | * @start_stop: action to carry out |
739 | * | |
740 | * start_stop == 0 disables receive on the port, for use in queue | |
741 | * overflow conditions. start_stop==1 re-enables, to be used to | |
742 | * re-init the software copy of the head register | |
743 | */ | |
9929b0fb BS |
744 | static int ipath_manage_rcvq(struct ipath_portdata *pd, unsigned subport, |
745 | int start_stop) | |
7f510b46 BS |
746 | { |
747 | struct ipath_devdata *dd = pd->port_dd; | |
7f510b46 | 748 | |
9929b0fb | 749 | ipath_cdbg(PROC, "%sabling rcv for unit %u port %u:%u\n", |
7f510b46 | 750 | start_stop ? "en" : "dis", dd->ipath_unit, |
9929b0fb BS |
751 | pd->port_port, subport); |
752 | if (subport) | |
753 | goto bail; | |
7f510b46 BS |
754 | /* atomically clear receive enable port. */ |
755 | if (start_stop) { | |
756 | /* | |
757 | * On enable, force in-memory copy of the tail register to | |
758 | * 0, so that protocol code doesn't have to worry about | |
759 | * whether or not the chip has yet updated the in-memory | |
760 | * copy or not on return from the system call. The chip | |
761 | * always resets it's tail register back to 0 on a | |
762 | * transition from disabled to enabled. This could cause a | |
763 | * problem if software was broken, and did the enable w/o | |
764 | * the disable, but eventually the in-memory copy will be | |
765 | * updated and correct itself, even in the face of software | |
766 | * bugs. | |
767 | */ | |
c59a80ac RC |
768 | if (pd->port_rcvhdrtail_kvaddr) |
769 | ipath_clear_rcvhdrtail(pd); | |
d8274869 | 770 | set_bit(dd->ipath_r_portenable_shift + pd->port_port, |
7f510b46 BS |
771 | &dd->ipath_rcvctrl); |
772 | } else | |
d8274869 | 773 | clear_bit(dd->ipath_r_portenable_shift + pd->port_port, |
7f510b46 BS |
774 | &dd->ipath_rcvctrl); |
775 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, | |
776 | dd->ipath_rcvctrl); | |
777 | /* now be sure chip saw it before we return */ | |
44f8e3f3 | 778 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
7f510b46 BS |
779 | if (start_stop) { |
780 | /* | |
781 | * And try to be sure that tail reg update has happened too. | |
782 | * This should in theory interlock with the RXE changes to | |
783 | * the tail register. Don't assign it to the tail register | |
784 | * in memory copy, since we could overwrite an update by the | |
785 | * chip if we did. | |
786 | */ | |
44f8e3f3 | 787 | ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); |
7f510b46 BS |
788 | } |
789 | /* always; new head should be equal to new tail; see above */ | |
9929b0fb | 790 | bail: |
7f510b46 BS |
791 | return 0; |
792 | } | |
793 | ||
794 | static void ipath_clean_part_key(struct ipath_portdata *pd, | |
795 | struct ipath_devdata *dd) | |
796 | { | |
797 | int i, j, pchanged = 0; | |
798 | u64 oldpkey; | |
799 | ||
800 | /* for debugging only */ | |
801 | oldpkey = (u64) dd->ipath_pkeys[0] | | |
802 | ((u64) dd->ipath_pkeys[1] << 16) | | |
803 | ((u64) dd->ipath_pkeys[2] << 32) | | |
804 | ((u64) dd->ipath_pkeys[3] << 48); | |
805 | ||
806 | for (i = 0; i < ARRAY_SIZE(pd->port_pkeys); i++) { | |
807 | if (!pd->port_pkeys[i]) | |
808 | continue; | |
809 | ipath_cdbg(VERBOSE, "look for key[%d] %hx in pkeys\n", i, | |
810 | pd->port_pkeys[i]); | |
811 | for (j = 0; j < ARRAY_SIZE(dd->ipath_pkeys); j++) { | |
812 | /* check for match independent of the global bit */ | |
813 | if ((dd->ipath_pkeys[j] & 0x7fff) != | |
814 | (pd->port_pkeys[i] & 0x7fff)) | |
815 | continue; | |
816 | if (atomic_dec_and_test(&dd->ipath_pkeyrefs[j])) { | |
817 | ipath_cdbg(VERBOSE, "p%u clear key " | |
818 | "%x matches #%d\n", | |
819 | pd->port_port, | |
820 | pd->port_pkeys[i], j); | |
821 | ipath_stats.sps_pkeys[j] = | |
822 | dd->ipath_pkeys[j] = 0; | |
823 | pchanged++; | |
824 | } | |
825 | else ipath_cdbg( | |
826 | VERBOSE, "p%u key %x matches #%d, " | |
827 | "but ref still %d\n", pd->port_port, | |
828 | pd->port_pkeys[i], j, | |
829 | atomic_read(&dd->ipath_pkeyrefs[j])); | |
830 | break; | |
831 | } | |
832 | pd->port_pkeys[i] = 0; | |
833 | } | |
834 | if (pchanged) { | |
835 | u64 pkey = (u64) dd->ipath_pkeys[0] | | |
836 | ((u64) dd->ipath_pkeys[1] << 16) | | |
837 | ((u64) dd->ipath_pkeys[2] << 32) | | |
838 | ((u64) dd->ipath_pkeys[3] << 48); | |
839 | ipath_cdbg(VERBOSE, "p%u old pkey reg %llx, " | |
840 | "new pkey reg %llx\n", pd->port_port, | |
841 | (unsigned long long) oldpkey, | |
842 | (unsigned long long) pkey); | |
843 | ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey, | |
844 | pkey); | |
845 | } | |
846 | } | |
847 | ||
9929b0fb BS |
848 | /* |
849 | * Initialize the port data with the receive buffer sizes | |
850 | * so this can be done while the master port is locked. | |
851 | * Otherwise, there is a race with a slave opening the port | |
852 | * and seeing these fields uninitialized. | |
853 | */ | |
854 | static void init_user_egr_sizes(struct ipath_portdata *pd) | |
855 | { | |
856 | struct ipath_devdata *dd = pd->port_dd; | |
857 | unsigned egrperchunk, egrcnt, size; | |
858 | ||
859 | /* | |
860 | * to avoid wasting a lot of memory, we allocate 32KB chunks of | |
861 | * physically contiguous memory, advance through it until used up | |
862 | * and then allocate more. Of course, we need memory to store those | |
863 | * extra pointers, now. Started out with 256KB, but under heavy | |
864 | * memory pressure (creating large files and then copying them over | |
865 | * NFS while doing lots of MPI jobs), we hit some allocation | |
866 | * failures, even though we can sleep... (2.6.10) Still get | |
867 | * failures at 64K. 32K is the lowest we can go without wasting | |
868 | * additional memory. | |
869 | */ | |
870 | size = 0x8000; | |
871 | egrperchunk = size / dd->ipath_rcvegrbufsize; | |
872 | egrcnt = dd->ipath_rcvegrcnt; | |
873 | pd->port_rcvegrbuf_chunks = (egrcnt + egrperchunk - 1) / egrperchunk; | |
874 | pd->port_rcvegrbufs_perchunk = egrperchunk; | |
875 | pd->port_rcvegrbuf_size = size; | |
876 | } | |
877 | ||
7f510b46 BS |
878 | /** |
879 | * ipath_create_user_egr - allocate eager TID buffers | |
880 | * @pd: the port to allocate TID buffers for | |
881 | * | |
882 | * This routine is now quite different for user and kernel, because | |
883 | * the kernel uses skb's, for the accelerated network performance | |
884 | * This is the user port version | |
885 | * | |
886 | * Allocate the eager TID buffers and program them into infinipath | |
887 | * They are no longer completely contiguous, we do multiple allocation | |
888 | * calls. | |
889 | */ | |
890 | static int ipath_create_user_egr(struct ipath_portdata *pd) | |
891 | { | |
892 | struct ipath_devdata *dd = pd->port_dd; | |
9929b0fb | 893 | unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff; |
7f510b46 BS |
894 | size_t size; |
895 | int ret; | |
0ed9a4a0 BS |
896 | gfp_t gfp_flags; |
897 | ||
898 | /* | |
899 | * GFP_USER, but without GFP_FS, so buffer cache can be | |
900 | * coalesced (we hope); otherwise, even at order 4, | |
901 | * heavy filesystem activity makes these fail, and we can | |
902 | * use compound pages. | |
903 | */ | |
904 | gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP; | |
7f510b46 BS |
905 | |
906 | egrcnt = dd->ipath_rcvegrcnt; | |
907 | /* TID number offset for this port */ | |
60948a41 | 908 | egroff = (pd->port_port - 1) * egrcnt + dd->ipath_p0_rcvegrcnt; |
7f510b46 BS |
909 | egrsize = dd->ipath_rcvegrbufsize; |
910 | ipath_cdbg(VERBOSE, "Allocating %d egr buffers, at egrtid " | |
911 | "offset %x, egrsize %u\n", egrcnt, egroff, egrsize); | |
912 | ||
9929b0fb BS |
913 | chunk = pd->port_rcvegrbuf_chunks; |
914 | egrperchunk = pd->port_rcvegrbufs_perchunk; | |
915 | size = pd->port_rcvegrbuf_size; | |
916 | pd->port_rcvegrbuf = kmalloc(chunk * sizeof(pd->port_rcvegrbuf[0]), | |
917 | GFP_KERNEL); | |
7f510b46 BS |
918 | if (!pd->port_rcvegrbuf) { |
919 | ret = -ENOMEM; | |
920 | goto bail; | |
921 | } | |
922 | pd->port_rcvegrbuf_phys = | |
9929b0fb BS |
923 | kmalloc(chunk * sizeof(pd->port_rcvegrbuf_phys[0]), |
924 | GFP_KERNEL); | |
7f510b46 BS |
925 | if (!pd->port_rcvegrbuf_phys) { |
926 | ret = -ENOMEM; | |
927 | goto bail_rcvegrbuf; | |
928 | } | |
929 | for (e = 0; e < pd->port_rcvegrbuf_chunks; e++) { | |
7f510b46 BS |
930 | |
931 | pd->port_rcvegrbuf[e] = dma_alloc_coherent( | |
932 | &dd->pcidev->dev, size, &pd->port_rcvegrbuf_phys[e], | |
933 | gfp_flags); | |
934 | ||
935 | if (!pd->port_rcvegrbuf[e]) { | |
936 | ret = -ENOMEM; | |
937 | goto bail_rcvegrbuf_phys; | |
938 | } | |
939 | } | |
940 | ||
941 | pd->port_rcvegr_phys = pd->port_rcvegrbuf_phys[0]; | |
942 | ||
943 | for (e = chunk = 0; chunk < pd->port_rcvegrbuf_chunks; chunk++) { | |
944 | dma_addr_t pa = pd->port_rcvegrbuf_phys[chunk]; | |
945 | unsigned i; | |
946 | ||
947 | for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) { | |
948 | dd->ipath_f_put_tid(dd, e + egroff + | |
949 | (u64 __iomem *) | |
950 | ((char __iomem *) | |
951 | dd->ipath_kregbase + | |
f716cdfe JE |
952 | dd->ipath_rcvegrbase), |
953 | RCVHQ_RCV_TYPE_EAGER, pa); | |
7f510b46 BS |
954 | pa += egrsize; |
955 | } | |
956 | cond_resched(); /* don't hog the cpu */ | |
957 | } | |
958 | ||
959 | ret = 0; | |
960 | goto bail; | |
961 | ||
962 | bail_rcvegrbuf_phys: | |
963 | for (e = 0; e < pd->port_rcvegrbuf_chunks && | |
f37bda92 | 964 | pd->port_rcvegrbuf[e]; e++) { |
7f510b46 BS |
965 | dma_free_coherent(&dd->pcidev->dev, size, |
966 | pd->port_rcvegrbuf[e], | |
967 | pd->port_rcvegrbuf_phys[e]); | |
968 | ||
f37bda92 | 969 | } |
9929b0fb | 970 | kfree(pd->port_rcvegrbuf_phys); |
7f510b46 BS |
971 | pd->port_rcvegrbuf_phys = NULL; |
972 | bail_rcvegrbuf: | |
9929b0fb | 973 | kfree(pd->port_rcvegrbuf); |
7f510b46 BS |
974 | pd->port_rcvegrbuf = NULL; |
975 | bail: | |
976 | return ret; | |
977 | } | |
978 | ||
f37bda92 BS |
979 | |
980 | /* common code for the mappings on dma_alloc_coherent mem */ | |
981 | static int ipath_mmap_mem(struct vm_area_struct *vma, | |
1fd3b40f BS |
982 | struct ipath_portdata *pd, unsigned len, int write_ok, |
983 | void *kvaddr, char *what) | |
f37bda92 BS |
984 | { |
985 | struct ipath_devdata *dd = pd->port_dd; | |
1fd3b40f | 986 | unsigned long pfn; |
f37bda92 BS |
987 | int ret; |
988 | ||
989 | if ((vma->vm_end - vma->vm_start) > len) { | |
990 | dev_info(&dd->pcidev->dev, | |
991 | "FAIL on %s: len %lx > %x\n", what, | |
992 | vma->vm_end - vma->vm_start, len); | |
993 | ret = -EFAULT; | |
994 | goto bail; | |
995 | } | |
996 | ||
997 | if (!write_ok) { | |
998 | if (vma->vm_flags & VM_WRITE) { | |
999 | dev_info(&dd->pcidev->dev, | |
1000 | "%s must be mapped readonly\n", what); | |
1001 | ret = -EPERM; | |
1002 | goto bail; | |
1003 | } | |
1004 | ||
1005 | /* don't allow them to later change with mprotect */ | |
1006 | vma->vm_flags &= ~VM_MAYWRITE; | |
1007 | } | |
1008 | ||
1fd3b40f | 1009 | pfn = virt_to_phys(kvaddr) >> PAGE_SHIFT; |
f37bda92 BS |
1010 | ret = remap_pfn_range(vma, vma->vm_start, pfn, |
1011 | len, vma->vm_page_prot); | |
1012 | if (ret) | |
1fd3b40f BS |
1013 | dev_info(&dd->pcidev->dev, "%s port%u mmap of %lx, %x " |
1014 | "bytes r%c failed: %d\n", what, pd->port_port, | |
1015 | pfn, len, write_ok?'w':'o', ret); | |
f37bda92 | 1016 | else |
1fd3b40f BS |
1017 | ipath_cdbg(VERBOSE, "%s port%u mmaped %lx, %x bytes " |
1018 | "r%c\n", what, pd->port_port, pfn, len, | |
1019 | write_ok?'w':'o'); | |
f37bda92 BS |
1020 | bail: |
1021 | return ret; | |
1022 | } | |
1023 | ||
7f510b46 BS |
1024 | static int mmap_ureg(struct vm_area_struct *vma, struct ipath_devdata *dd, |
1025 | u64 ureg) | |
1026 | { | |
1027 | unsigned long phys; | |
1028 | int ret; | |
1029 | ||
f37bda92 BS |
1030 | /* |
1031 | * This is real hardware, so use io_remap. This is the mechanism | |
1032 | * for the user process to update the head registers for their port | |
1033 | * in the chip. | |
1034 | */ | |
7f510b46 BS |
1035 | if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) { |
1036 | dev_info(&dd->pcidev->dev, "FAIL mmap userreg: reqlen " | |
1037 | "%lx > PAGE\n", vma->vm_end - vma->vm_start); | |
1038 | ret = -EFAULT; | |
1039 | } else { | |
1040 | phys = dd->ipath_physaddr + ureg; | |
1041 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
1042 | ||
1043 | vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
1044 | ret = io_remap_pfn_range(vma, vma->vm_start, | |
1045 | phys >> PAGE_SHIFT, | |
1046 | vma->vm_end - vma->vm_start, | |
1047 | vma->vm_page_prot); | |
1048 | } | |
1049 | return ret; | |
1050 | } | |
1051 | ||
1052 | static int mmap_piobufs(struct vm_area_struct *vma, | |
1053 | struct ipath_devdata *dd, | |
9929b0fb BS |
1054 | struct ipath_portdata *pd, |
1055 | unsigned piobufs, unsigned piocnt) | |
7f510b46 BS |
1056 | { |
1057 | unsigned long phys; | |
1058 | int ret; | |
1059 | ||
1060 | /* | |
f37bda92 BS |
1061 | * When we map the PIO buffers in the chip, we want to map them as |
1062 | * writeonly, no read possible. This prevents access to previous | |
1063 | * process data, and catches users who might try to read the i/o | |
1064 | * space due to a bug. | |
7f510b46 | 1065 | */ |
9929b0fb | 1066 | if ((vma->vm_end - vma->vm_start) > (piocnt * dd->ipath_palign)) { |
7f510b46 BS |
1067 | dev_info(&dd->pcidev->dev, "FAIL mmap piobufs: " |
1068 | "reqlen %lx > PAGE\n", | |
1069 | vma->vm_end - vma->vm_start); | |
9929b0fb | 1070 | ret = -EINVAL; |
7f510b46 BS |
1071 | goto bail; |
1072 | } | |
1073 | ||
9929b0fb | 1074 | phys = dd->ipath_physaddr + piobufs; |
f37bda92 | 1075 | |
eb9dc6f4 BS |
1076 | #if defined(__powerpc__) |
1077 | /* There isn't a generic way to specify writethrough mappings */ | |
1078 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; | |
1079 | pgprot_val(vma->vm_page_prot) |= _PAGE_WRITETHRU; | |
1080 | pgprot_val(vma->vm_page_prot) &= ~_PAGE_GUARDED; | |
1081 | #endif | |
1082 | ||
367fe711 BS |
1083 | /* |
1084 | * don't allow them to later change to readable with mprotect (for when | |
1085 | * not initially mapped readable, as is normally the case) | |
1086 | */ | |
f37bda92 | 1087 | vma->vm_flags &= ~VM_MAYREAD; |
7f510b46 BS |
1088 | vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND; |
1089 | ||
1090 | ret = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT, | |
1091 | vma->vm_end - vma->vm_start, | |
1092 | vma->vm_page_prot); | |
1093 | bail: | |
1094 | return ret; | |
1095 | } | |
1096 | ||
1097 | static int mmap_rcvegrbufs(struct vm_area_struct *vma, | |
1098 | struct ipath_portdata *pd) | |
1099 | { | |
1100 | struct ipath_devdata *dd = pd->port_dd; | |
1101 | unsigned long start, size; | |
1102 | size_t total_size, i; | |
1fd3b40f | 1103 | unsigned long pfn; |
7f510b46 BS |
1104 | int ret; |
1105 | ||
7f510b46 BS |
1106 | size = pd->port_rcvegrbuf_size; |
1107 | total_size = pd->port_rcvegrbuf_chunks * size; | |
1108 | if ((vma->vm_end - vma->vm_start) > total_size) { | |
1109 | dev_info(&dd->pcidev->dev, "FAIL on egr bufs: " | |
1110 | "reqlen %lx > actual %lx\n", | |
1111 | vma->vm_end - vma->vm_start, | |
1112 | (unsigned long) total_size); | |
9929b0fb | 1113 | ret = -EINVAL; |
7f510b46 BS |
1114 | goto bail; |
1115 | } | |
1116 | ||
1117 | if (vma->vm_flags & VM_WRITE) { | |
1118 | dev_info(&dd->pcidev->dev, "Can't map eager buffers as " | |
1119 | "writable (flags=%lx)\n", vma->vm_flags); | |
1120 | ret = -EPERM; | |
1121 | goto bail; | |
1122 | } | |
f37bda92 BS |
1123 | /* don't allow them to later change to writeable with mprotect */ |
1124 | vma->vm_flags &= ~VM_MAYWRITE; | |
7f510b46 BS |
1125 | |
1126 | start = vma->vm_start; | |
7f510b46 | 1127 | |
7f510b46 | 1128 | for (i = 0; i < pd->port_rcvegrbuf_chunks; i++, start += size) { |
1fd3b40f BS |
1129 | pfn = virt_to_phys(pd->port_rcvegrbuf[i]) >> PAGE_SHIFT; |
1130 | ret = remap_pfn_range(vma, start, pfn, size, | |
1131 | vma->vm_page_prot); | |
7f510b46 BS |
1132 | if (ret < 0) |
1133 | goto bail; | |
1134 | } | |
1135 | ret = 0; | |
1136 | ||
1137 | bail: | |
1138 | return ret; | |
1139 | } | |
1140 | ||
9929b0fb | 1141 | /* |
3c845086 | 1142 | * ipath_file_vma_fault - handle a VMA page fault. |
9929b0fb | 1143 | */ |
3c845086 NP |
1144 | static int ipath_file_vma_fault(struct vm_area_struct *vma, |
1145 | struct vm_fault *vmf) | |
9929b0fb | 1146 | { |
3c845086 | 1147 | struct page *page; |
9929b0fb | 1148 | |
3c845086 | 1149 | page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); |
9929b0fb | 1150 | if (!page) |
3c845086 | 1151 | return VM_FAULT_SIGBUS; |
9929b0fb | 1152 | get_page(page); |
3c845086 NP |
1153 | vmf->page = page; |
1154 | ||
1155 | return 0; | |
9929b0fb BS |
1156 | } |
1157 | ||
f0f37e2f | 1158 | static const struct vm_operations_struct ipath_file_vm_ops = { |
3c845086 | 1159 | .fault = ipath_file_vma_fault, |
9929b0fb BS |
1160 | }; |
1161 | ||
1162 | static int mmap_kvaddr(struct vm_area_struct *vma, u64 pgaddr, | |
1163 | struct ipath_portdata *pd, unsigned subport) | |
1164 | { | |
1165 | unsigned long len; | |
1166 | struct ipath_devdata *dd; | |
1167 | void *addr; | |
1168 | size_t size; | |
0a5a83cf | 1169 | int ret = 0; |
9929b0fb BS |
1170 | |
1171 | /* If the port is not shared, all addresses should be physical */ | |
0a5a83cf | 1172 | if (!pd->port_subport_cnt) |
9929b0fb | 1173 | goto bail; |
9929b0fb BS |
1174 | |
1175 | dd = pd->port_dd; | |
1176 | size = pd->port_rcvegrbuf_chunks * pd->port_rcvegrbuf_size; | |
1177 | ||
1178 | /* | |
c7e29ff1 MD |
1179 | * Each process has all the subport uregbase, rcvhdrq, and |
1180 | * rcvegrbufs mmapped - as an array for all the processes, | |
1181 | * and also separately for this process. | |
9929b0fb | 1182 | */ |
c7e29ff1 MD |
1183 | if (pgaddr == cvt_kvaddr(pd->subport_uregbase)) { |
1184 | addr = pd->subport_uregbase; | |
1185 | size = PAGE_SIZE * pd->port_subport_cnt; | |
1186 | } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base)) { | |
1187 | addr = pd->subport_rcvhdr_base; | |
1188 | size = pd->port_rcvhdrq_size * pd->port_subport_cnt; | |
1189 | } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf)) { | |
1190 | addr = pd->subport_rcvegrbuf; | |
1191 | size *= pd->port_subport_cnt; | |
1192 | } else if (pgaddr == cvt_kvaddr(pd->subport_uregbase + | |
1193 | PAGE_SIZE * subport)) { | |
1194 | addr = pd->subport_uregbase + PAGE_SIZE * subport; | |
1195 | size = PAGE_SIZE; | |
1196 | } else if (pgaddr == cvt_kvaddr(pd->subport_rcvhdr_base + | |
1197 | pd->port_rcvhdrq_size * subport)) { | |
1198 | addr = pd->subport_rcvhdr_base + | |
1199 | pd->port_rcvhdrq_size * subport; | |
1200 | size = pd->port_rcvhdrq_size; | |
1201 | } else if (pgaddr == cvt_kvaddr(pd->subport_rcvegrbuf + | |
1202 | size * subport)) { | |
1203 | addr = pd->subport_rcvegrbuf + size * subport; | |
1204 | /* rcvegrbufs are read-only on the slave */ | |
1205 | if (vma->vm_flags & VM_WRITE) { | |
1206 | dev_info(&dd->pcidev->dev, | |
1207 | "Can't map eager buffers as " | |
1208 | "writable (flags=%lx)\n", vma->vm_flags); | |
1209 | ret = -EPERM; | |
1210 | goto bail; | |
1211 | } | |
1212 | /* | |
1213 | * Don't allow permission to later change to writeable | |
1214 | * with mprotect. | |
1215 | */ | |
1216 | vma->vm_flags &= ~VM_MAYWRITE; | |
1217 | } else { | |
9929b0fb | 1218 | goto bail; |
c7e29ff1 | 1219 | } |
9929b0fb BS |
1220 | len = vma->vm_end - vma->vm_start; |
1221 | if (len > size) { | |
1222 | ipath_cdbg(MM, "FAIL: reqlen %lx > %zx\n", len, size); | |
1223 | ret = -EINVAL; | |
1224 | goto bail; | |
1225 | } | |
1226 | ||
1227 | vma->vm_pgoff = (unsigned long) addr >> PAGE_SHIFT; | |
1228 | vma->vm_ops = &ipath_file_vm_ops; | |
314e51b9 | 1229 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
0a5a83cf | 1230 | ret = 1; |
9929b0fb BS |
1231 | |
1232 | bail: | |
1233 | return ret; | |
1234 | } | |
1235 | ||
7f510b46 BS |
1236 | /** |
1237 | * ipath_mmap - mmap various structures into user space | |
1238 | * @fp: the file pointer | |
1239 | * @vma: the VM area | |
1240 | * | |
1241 | * We use this to have a shared buffer between the kernel and the user code | |
1242 | * for the rcvhdr queue, egr buffers, and the per-port user regs and pio | |
1243 | * buffers in the chip. We have the open and close entries so we can bump | |
1244 | * the ref count and keep the driver from being unloaded while still mapped. | |
1245 | */ | |
1246 | static int ipath_mmap(struct file *fp, struct vm_area_struct *vma) | |
1247 | { | |
1248 | struct ipath_portdata *pd; | |
1249 | struct ipath_devdata *dd; | |
1250 | u64 pgaddr, ureg; | |
9929b0fb | 1251 | unsigned piobufs, piocnt; |
7f510b46 BS |
1252 | int ret; |
1253 | ||
1254 | pd = port_fp(fp); | |
9929b0fb BS |
1255 | if (!pd) { |
1256 | ret = -EINVAL; | |
1257 | goto bail; | |
1258 | } | |
7f510b46 | 1259 | dd = pd->port_dd; |
f37bda92 | 1260 | |
7f510b46 BS |
1261 | /* |
1262 | * This is the ipath_do_user_init() code, mapping the shared buffers | |
1263 | * into the user process. The address referred to by vm_pgoff is the | |
9929b0fb BS |
1264 | * file offset passed via mmap(). For shared ports, this is the |
1265 | * kernel vmalloc() address of the pages to share with the master. | |
1266 | * For non-shared or master ports, this is a physical address. | |
1267 | * We only do one mmap for each space mapped. | |
7f510b46 BS |
1268 | */ |
1269 | pgaddr = vma->vm_pgoff << PAGE_SHIFT; | |
1270 | ||
1271 | /* | |
9929b0fb BS |
1272 | * Check for 0 in case one of the allocations failed, but user |
1273 | * called mmap anyway. | |
7f510b46 | 1274 | */ |
9929b0fb BS |
1275 | if (!pgaddr) { |
1276 | ret = -EINVAL; | |
1277 | goto bail; | |
f37bda92 | 1278 | } |
7f510b46 | 1279 | |
9929b0fb | 1280 | ipath_cdbg(MM, "pgaddr %llx vm_start=%lx len %lx port %u:%u:%u\n", |
7f510b46 | 1281 | (unsigned long long) pgaddr, vma->vm_start, |
9929b0fb BS |
1282 | vma->vm_end - vma->vm_start, dd->ipath_unit, |
1283 | pd->port_port, subport_fp(fp)); | |
7f510b46 | 1284 | |
9929b0fb BS |
1285 | /* |
1286 | * Physical addresses must fit in 40 bits for our hardware. | |
1287 | * Check for kernel virtual addresses first, anything else must | |
1288 | * match a HW or memory address. | |
1289 | */ | |
0a5a83cf RC |
1290 | ret = mmap_kvaddr(vma, pgaddr, pd, subport_fp(fp)); |
1291 | if (ret) { | |
1292 | if (ret > 0) | |
1293 | ret = 0; | |
9929b0fb BS |
1294 | goto bail; |
1295 | } | |
1296 | ||
a18e26ae | 1297 | ureg = dd->ipath_uregbase + dd->ipath_ureg_align * pd->port_port; |
9929b0fb BS |
1298 | if (!pd->port_subport_cnt) { |
1299 | /* port is not shared */ | |
e2ab41ca | 1300 | piocnt = pd->port_piocnt; |
9929b0fb BS |
1301 | piobufs = pd->port_piobufs; |
1302 | } else if (!subport_fp(fp)) { | |
1303 | /* caller is the master */ | |
e2ab41ca DO |
1304 | piocnt = (pd->port_piocnt / pd->port_subport_cnt) + |
1305 | (pd->port_piocnt % pd->port_subport_cnt); | |
9929b0fb | 1306 | piobufs = pd->port_piobufs + |
e2ab41ca | 1307 | dd->ipath_palign * (pd->port_piocnt - piocnt); |
9929b0fb BS |
1308 | } else { |
1309 | unsigned slave = subport_fp(fp) - 1; | |
1310 | ||
1311 | /* caller is a slave */ | |
e2ab41ca | 1312 | piocnt = pd->port_piocnt / pd->port_subport_cnt; |
9929b0fb | 1313 | piobufs = pd->port_piobufs + dd->ipath_palign * piocnt * slave; |
f37bda92 | 1314 | } |
9929b0fb BS |
1315 | |
1316 | if (pgaddr == ureg) | |
7f510b46 | 1317 | ret = mmap_ureg(vma, dd, ureg); |
9929b0fb BS |
1318 | else if (pgaddr == piobufs) |
1319 | ret = mmap_piobufs(vma, dd, pd, piobufs, piocnt); | |
1320 | else if (pgaddr == dd->ipath_pioavailregs_phys) | |
1321 | /* in-memory copy of pioavail registers */ | |
1322 | ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, | |
1fd3b40f | 1323 | (void *) dd->ipath_pioavailregs_dma, |
9929b0fb | 1324 | "pioavail registers"); |
9929b0fb | 1325 | else if (pgaddr == pd->port_rcvegr_phys) |
7f510b46 | 1326 | ret = mmap_rcvegrbufs(vma, pd); |
9929b0fb | 1327 | else if (pgaddr == (u64) pd->port_rcvhdrq_phys) |
f37bda92 | 1328 | /* |
525d0ca1 | 1329 | * The rcvhdrq itself; readonly except on HT (so have |
f37bda92 BS |
1330 | * to allow writable mapping), multiple pages, contiguous |
1331 | * from an i/o perspective. | |
1332 | */ | |
9929b0fb | 1333 | ret = ipath_mmap_mem(vma, pd, pd->port_rcvhdrq_size, 1, |
1fd3b40f | 1334 | pd->port_rcvhdrq, |
f37bda92 | 1335 | "rcvhdrq"); |
9929b0fb | 1336 | else if (pgaddr == (u64) pd->port_rcvhdrqtailaddr_phys) |
f37bda92 BS |
1337 | /* in-memory copy of rcvhdrq tail register */ |
1338 | ret = ipath_mmap_mem(vma, pd, PAGE_SIZE, 0, | |
1fd3b40f | 1339 | pd->port_rcvhdrtail_kvaddr, |
f37bda92 | 1340 | "rcvhdrq tail"); |
7f510b46 BS |
1341 | else |
1342 | ret = -EINVAL; | |
1343 | ||
1344 | vma->vm_private_data = NULL; | |
1345 | ||
1346 | if (ret < 0) | |
1347 | dev_info(&dd->pcidev->dev, | |
9929b0fb BS |
1348 | "Failure %d on off %llx len %lx\n", |
1349 | -ret, (unsigned long long)pgaddr, | |
1350 | vma->vm_end - vma->vm_start); | |
1351 | bail: | |
7f510b46 BS |
1352 | return ret; |
1353 | } | |
1354 | ||
70c51da2 AJ |
1355 | static unsigned ipath_poll_hdrqfull(struct ipath_portdata *pd) |
1356 | { | |
1357 | unsigned pollflag = 0; | |
1358 | ||
1359 | if ((pd->poll_type & IPATH_POLL_TYPE_OVERFLOW) && | |
1360 | pd->port_hdrqfull != pd->port_hdrqfull_poll) { | |
1361 | pollflag |= POLLIN | POLLRDNORM; | |
1362 | pd->port_hdrqfull_poll = pd->port_hdrqfull; | |
1363 | } | |
1364 | ||
1365 | return pollflag; | |
1366 | } | |
1367 | ||
f2d04231 RW |
1368 | static unsigned int ipath_poll_urgent(struct ipath_portdata *pd, |
1369 | struct file *fp, | |
1370 | struct poll_table_struct *pt) | |
7f510b46 | 1371 | { |
e35d710d | 1372 | unsigned pollflag = 0; |
7f510b46 BS |
1373 | struct ipath_devdata *dd; |
1374 | ||
7f510b46 BS |
1375 | dd = pd->port_dd; |
1376 | ||
70c51da2 AJ |
1377 | /* variable access in ipath_poll_hdrqfull() needs this */ |
1378 | rmb(); | |
1379 | pollflag = ipath_poll_hdrqfull(pd); | |
7f510b46 | 1380 | |
70c51da2 | 1381 | if (pd->port_urgent != pd->port_urgent_poll) { |
f2d04231 | 1382 | pollflag |= POLLIN | POLLRDNORM; |
70c51da2 | 1383 | pd->port_urgent_poll = pd->port_urgent; |
f2d04231 | 1384 | } |
7f510b46 | 1385 | |
f2d04231 | 1386 | if (!pollflag) { |
70c51da2 | 1387 | /* this saves a spin_lock/unlock in interrupt handler... */ |
f2d04231 | 1388 | set_bit(IPATH_PORT_WAITING_URG, &pd->port_flag); |
70c51da2 AJ |
1389 | /* flush waiting flag so don't miss an event... */ |
1390 | wmb(); | |
f2d04231 RW |
1391 | poll_wait(fp, &pd->port_wait, pt); |
1392 | } | |
1393 | ||
1394 | return pollflag; | |
1395 | } | |
1396 | ||
1397 | static unsigned int ipath_poll_next(struct ipath_portdata *pd, | |
1398 | struct file *fp, | |
1399 | struct poll_table_struct *pt) | |
1400 | { | |
70c51da2 AJ |
1401 | u32 head; |
1402 | u32 tail; | |
f2d04231 RW |
1403 | unsigned pollflag = 0; |
1404 | struct ipath_devdata *dd; | |
1405 | ||
1406 | dd = pd->port_dd; | |
7f510b46 | 1407 | |
70c51da2 AJ |
1408 | /* variable access in ipath_poll_hdrqfull() needs this */ |
1409 | rmb(); | |
1410 | pollflag = ipath_poll_hdrqfull(pd); | |
1411 | ||
7f510b46 | 1412 | head = ipath_read_ureg32(dd, ur_rcvhdrhead, pd->port_port); |
c59a80ac RC |
1413 | if (pd->port_rcvhdrtail_kvaddr) |
1414 | tail = ipath_get_rcvhdrtail(pd); | |
1415 | else | |
1416 | tail = ipath_read_ureg32(dd, ur_rcvhdrtail, pd->port_port); | |
f2d04231 | 1417 | |
70c51da2 | 1418 | if (head != tail) |
f2d04231 | 1419 | pollflag |= POLLIN | POLLRDNORM; |
70c51da2 AJ |
1420 | else { |
1421 | /* this saves a spin_lock/unlock in interrupt handler */ | |
7f510b46 | 1422 | set_bit(IPATH_PORT_WAITING_RCV, &pd->port_flag); |
70c51da2 AJ |
1423 | /* flush waiting flag so we don't miss an event */ |
1424 | wmb(); | |
f2d04231 | 1425 | |
d8274869 | 1426 | set_bit(pd->port_port + dd->ipath_r_intravail_shift, |
f2d04231 RW |
1427 | &dd->ipath_rcvctrl); |
1428 | ||
1429 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, | |
1430 | dd->ipath_rcvctrl); | |
1431 | ||
9929b0fb | 1432 | if (dd->ipath_rhdrhead_intr_off) /* arm rcv interrupt */ |
f2d04231 RW |
1433 | ipath_write_ureg(dd, ur_rcvhdrhead, |
1434 | dd->ipath_rhdrhead_intr_off | head, | |
1435 | pd->port_port); | |
7f510b46 | 1436 | |
f2d04231 | 1437 | poll_wait(fp, &pd->port_wait, pt); |
7f510b46 BS |
1438 | } |
1439 | ||
f2d04231 RW |
1440 | return pollflag; |
1441 | } | |
1442 | ||
1443 | static unsigned int ipath_poll(struct file *fp, | |
1444 | struct poll_table_struct *pt) | |
1445 | { | |
1446 | struct ipath_portdata *pd; | |
1447 | unsigned pollflag; | |
1448 | ||
1449 | pd = port_fp(fp); | |
1450 | if (!pd) | |
1451 | pollflag = 0; | |
1452 | else if (pd->poll_type & IPATH_POLL_TYPE_URGENT) | |
1453 | pollflag = ipath_poll_urgent(pd, fp, pt); | |
1454 | else | |
1455 | pollflag = ipath_poll_next(pd, fp, pt); | |
7f510b46 | 1456 | |
e35d710d | 1457 | return pollflag; |
7f510b46 BS |
1458 | } |
1459 | ||
0df6291c MD |
1460 | static int ipath_supports_subports(int user_swmajor, int user_swminor) |
1461 | { | |
1462 | /* no subport implementation prior to software version 1.3 */ | |
1463 | return (user_swmajor > 1) || (user_swminor >= 3); | |
1464 | } | |
1465 | ||
1466 | static int ipath_compatible_subports(int user_swmajor, int user_swminor) | |
1467 | { | |
1468 | /* this code is written long-hand for clarity */ | |
1469 | if (IPATH_USER_SWMAJOR != user_swmajor) { | |
1470 | /* no promise of compatibility if major mismatch */ | |
1471 | return 0; | |
1472 | } | |
1473 | if (IPATH_USER_SWMAJOR == 1) { | |
1474 | switch (IPATH_USER_SWMINOR) { | |
1475 | case 0: | |
1476 | case 1: | |
1477 | case 2: | |
1478 | /* no subport implementation so cannot be compatible */ | |
1479 | return 0; | |
1480 | case 3: | |
1481 | /* 3 is only compatible with itself */ | |
1482 | return user_swminor == 3; | |
1483 | default: | |
1484 | /* >= 4 are compatible (or are expected to be) */ | |
1485 | return user_swminor >= 4; | |
1486 | } | |
1487 | } | |
1488 | /* make no promises yet for future major versions */ | |
1489 | return 0; | |
1490 | } | |
1491 | ||
9929b0fb BS |
1492 | static int init_subports(struct ipath_devdata *dd, |
1493 | struct ipath_portdata *pd, | |
1494 | const struct ipath_user_info *uinfo) | |
1495 | { | |
1496 | int ret = 0; | |
c7e29ff1 | 1497 | unsigned num_subports; |
9929b0fb BS |
1498 | size_t size; |
1499 | ||
9929b0fb | 1500 | /* |
bacf4013 | 1501 | * If the user is requesting zero subports, |
9929b0fb BS |
1502 | * skip the subport allocation. |
1503 | */ | |
bacf4013 | 1504 | if (uinfo->spu_subport_cnt <= 0) |
9929b0fb | 1505 | goto bail; |
c7e29ff1 | 1506 | |
0df6291c MD |
1507 | /* Self-consistency check for ipath_compatible_subports() */ |
1508 | if (ipath_supports_subports(IPATH_USER_SWMAJOR, IPATH_USER_SWMINOR) && | |
1509 | !ipath_compatible_subports(IPATH_USER_SWMAJOR, | |
1510 | IPATH_USER_SWMINOR)) { | |
c7e29ff1 | 1511 | dev_info(&dd->pcidev->dev, |
0df6291c MD |
1512 | "Inconsistent ipath_compatible_subports()\n"); |
1513 | goto bail; | |
1514 | } | |
1515 | ||
1516 | /* Check for subport compatibility */ | |
1517 | if (!ipath_compatible_subports(uinfo->spu_userversion >> 16, | |
1518 | uinfo->spu_userversion & 0xffff)) { | |
1519 | dev_info(&dd->pcidev->dev, | |
1520 | "Mismatched user version (%d.%d) and driver " | |
1521 | "version (%d.%d) while port sharing. Ensure " | |
c7e29ff1 MD |
1522 | "that driver and library are from the same " |
1523 | "release.\n", | |
0df6291c | 1524 | (int) (uinfo->spu_userversion >> 16), |
c7e29ff1 | 1525 | (int) (uinfo->spu_userversion & 0xffff), |
0df6291c | 1526 | IPATH_USER_SWMAJOR, |
c7e29ff1 MD |
1527 | IPATH_USER_SWMINOR); |
1528 | goto bail; | |
1529 | } | |
0a5a83cf | 1530 | if (uinfo->spu_subport_cnt > INFINIPATH_MAX_SUBPORT) { |
9929b0fb BS |
1531 | ret = -EINVAL; |
1532 | goto bail; | |
1533 | } | |
1534 | ||
c7e29ff1 | 1535 | num_subports = uinfo->spu_subport_cnt; |
948579cd | 1536 | pd->subport_uregbase = vzalloc(PAGE_SIZE * num_subports); |
9929b0fb BS |
1537 | if (!pd->subport_uregbase) { |
1538 | ret = -ENOMEM; | |
1539 | goto bail; | |
1540 | } | |
1541 | /* Note: pd->port_rcvhdrq_size isn't initialized yet. */ | |
1542 | size = ALIGN(dd->ipath_rcvhdrcnt * dd->ipath_rcvhdrentsize * | |
c7e29ff1 | 1543 | sizeof(u32), PAGE_SIZE) * num_subports; |
948579cd | 1544 | pd->subport_rcvhdr_base = vzalloc(size); |
9929b0fb BS |
1545 | if (!pd->subport_rcvhdr_base) { |
1546 | ret = -ENOMEM; | |
1547 | goto bail_ureg; | |
1548 | } | |
1549 | ||
948579cd | 1550 | pd->subport_rcvegrbuf = vzalloc(pd->port_rcvegrbuf_chunks * |
9929b0fb | 1551 | pd->port_rcvegrbuf_size * |
c7e29ff1 | 1552 | num_subports); |
9929b0fb BS |
1553 | if (!pd->subport_rcvegrbuf) { |
1554 | ret = -ENOMEM; | |
1555 | goto bail_rhdr; | |
1556 | } | |
1557 | ||
1558 | pd->port_subport_cnt = uinfo->spu_subport_cnt; | |
1559 | pd->port_subport_id = uinfo->spu_subport_id; | |
1560 | pd->active_slaves = 1; | |
947d7617 | 1561 | set_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); |
9929b0fb BS |
1562 | goto bail; |
1563 | ||
1564 | bail_rhdr: | |
1565 | vfree(pd->subport_rcvhdr_base); | |
1566 | bail_ureg: | |
1567 | vfree(pd->subport_uregbase); | |
1568 | pd->subport_uregbase = NULL; | |
1569 | bail: | |
1570 | return ret; | |
1571 | } | |
1572 | ||
7f510b46 | 1573 | static int try_alloc_port(struct ipath_devdata *dd, int port, |
9929b0fb BS |
1574 | struct file *fp, |
1575 | const struct ipath_user_info *uinfo) | |
7f510b46 | 1576 | { |
9929b0fb | 1577 | struct ipath_portdata *pd; |
7f510b46 BS |
1578 | int ret; |
1579 | ||
9929b0fb BS |
1580 | if (!(pd = dd->ipath_pd[port])) { |
1581 | void *ptmp; | |
7f510b46 | 1582 | |
9929b0fb | 1583 | pd = kzalloc(sizeof(struct ipath_portdata), GFP_KERNEL); |
7f510b46 BS |
1584 | |
1585 | /* | |
1586 | * Allocate memory for use in ipath_tid_update() just once | |
1587 | * at open, not per call. Reduces cost of expected send | |
1588 | * setup. | |
1589 | */ | |
1590 | ptmp = kmalloc(dd->ipath_rcvtidcnt * sizeof(u16) + | |
1591 | dd->ipath_rcvtidcnt * sizeof(struct page **), | |
1592 | GFP_KERNEL); | |
9929b0fb | 1593 | if (!pd || !ptmp) { |
7f510b46 BS |
1594 | ipath_dev_err(dd, "Unable to allocate portdata " |
1595 | "memory, failing open\n"); | |
1596 | ret = -ENOMEM; | |
9929b0fb | 1597 | kfree(pd); |
7f510b46 BS |
1598 | kfree(ptmp); |
1599 | goto bail; | |
1600 | } | |
9929b0fb | 1601 | dd->ipath_pd[port] = pd; |
7f510b46 BS |
1602 | dd->ipath_pd[port]->port_port = port; |
1603 | dd->ipath_pd[port]->port_dd = dd; | |
1604 | dd->ipath_pd[port]->port_tid_pg_list = ptmp; | |
1605 | init_waitqueue_head(&dd->ipath_pd[port]->port_wait); | |
1606 | } | |
9929b0fb BS |
1607 | if (!pd->port_cnt) { |
1608 | pd->userversion = uinfo->spu_userversion; | |
1609 | init_user_egr_sizes(pd); | |
1610 | if ((ret = init_subports(dd, pd, uinfo)) != 0) | |
1611 | goto bail; | |
7f510b46 BS |
1612 | ipath_cdbg(PROC, "%s[%u] opened unit:port %u:%u\n", |
1613 | current->comm, current->pid, dd->ipath_unit, | |
1614 | port); | |
9929b0fb BS |
1615 | pd->port_cnt = 1; |
1616 | port_fp(fp) = pd; | |
40d97692 | 1617 | pd->port_pid = get_pid(task_pid(current)); |
286b63d0 | 1618 | strlcpy(pd->port_comm, current->comm, sizeof(pd->port_comm)); |
7f510b46 BS |
1619 | ipath_stats.sps_ports++; |
1620 | ret = 0; | |
9929b0fb BS |
1621 | } else |
1622 | ret = -EBUSY; | |
7f510b46 BS |
1623 | |
1624 | bail: | |
1625 | return ret; | |
1626 | } | |
1627 | ||
1628 | static inline int usable(struct ipath_devdata *dd) | |
1629 | { | |
1630 | return dd && | |
1631 | (dd->ipath_flags & IPATH_PRESENT) && | |
1632 | dd->ipath_kregbase && | |
1633 | dd->ipath_lid && | |
1634 | !(dd->ipath_flags & (IPATH_LINKDOWN | IPATH_DISABLED | |
1635 | | IPATH_LINKUNK)); | |
1636 | } | |
1637 | ||
9929b0fb BS |
1638 | static int find_free_port(int unit, struct file *fp, |
1639 | const struct ipath_user_info *uinfo) | |
7f510b46 BS |
1640 | { |
1641 | struct ipath_devdata *dd = ipath_lookup(unit); | |
1642 | int ret, i; | |
1643 | ||
1644 | if (!dd) { | |
1645 | ret = -ENODEV; | |
1646 | goto bail; | |
1647 | } | |
1648 | ||
1649 | if (!usable(dd)) { | |
1650 | ret = -ENETDOWN; | |
1651 | goto bail; | |
1652 | } | |
1653 | ||
9929b0fb BS |
1654 | for (i = 1; i < dd->ipath_cfgports; i++) { |
1655 | ret = try_alloc_port(dd, i, fp, uinfo); | |
7f510b46 BS |
1656 | if (ret != -EBUSY) |
1657 | goto bail; | |
1658 | } | |
1659 | ret = -EBUSY; | |
1660 | ||
1661 | bail: | |
1662 | return ret; | |
1663 | } | |
1664 | ||
9929b0fb BS |
1665 | static int find_best_unit(struct file *fp, |
1666 | const struct ipath_user_info *uinfo) | |
7f510b46 BS |
1667 | { |
1668 | int ret = 0, i, prefunit = -1, devmax; | |
1669 | int maxofallports, npresent, nup; | |
1670 | int ndev; | |
1671 | ||
9929b0fb | 1672 | devmax = ipath_count_units(&npresent, &nup, &maxofallports); |
7f510b46 BS |
1673 | |
1674 | /* | |
1675 | * This code is present to allow a knowledgeable person to | |
1676 | * specify the layout of processes to processors before opening | |
1677 | * this driver, and then we'll assign the process to the "closest" | |
525d0ca1 | 1678 | * InfiniPath chip to that processor (we assume reasonable connectivity, |
7f510b46 BS |
1679 | * for now). This code assumes that if affinity has been set |
1680 | * before this point, that at most one cpu is set; for now this | |
cbe31f02 | 1681 | * is reasonable. I check for both cpumask_empty() and cpumask_full(), |
7f510b46 BS |
1682 | * in case some kernel variant sets none of the bits when no |
1683 | * affinity is set. 2.6.11 and 12 kernels have all present | |
1684 | * cpus set. Some day we'll have to fix it up further to handle | |
525d0ca1 | 1685 | * a cpu subset. This algorithm fails for two HT chips connected |
7f510b46 BS |
1686 | * in tunnel fashion. Eventually this needs real topology |
1687 | * information. There may be some issues with dual core numbering | |
1688 | * as well. This needs more work prior to release. | |
1689 | */ | |
57631811 MK |
1690 | if (!cpumask_empty(tsk_cpus_allowed(current)) && |
1691 | !cpumask_full(tsk_cpus_allowed(current))) { | |
f0810daf | 1692 | int ncpus = num_online_cpus(), curcpu = -1, nset = 0; |
57631811 MK |
1693 | get_online_cpus(); |
1694 | for_each_online_cpu(i) | |
1695 | if (cpumask_test_cpu(i, tsk_cpus_allowed(current))) { | |
7f510b46 | 1696 | ipath_cdbg(PROC, "%s[%u] affinity set for " |
f0810daf BS |
1697 | "cpu %d/%d\n", current->comm, |
1698 | current->pid, i, ncpus); | |
7f510b46 | 1699 | curcpu = i; |
f0810daf | 1700 | nset++; |
7f510b46 | 1701 | } |
57631811 | 1702 | put_online_cpus(); |
f0810daf | 1703 | if (curcpu != -1 && nset != ncpus) { |
7f510b46 BS |
1704 | if (npresent) { |
1705 | prefunit = curcpu / (ncpus / npresent); | |
c7e29ff1 | 1706 | ipath_cdbg(PROC,"%s[%u] %d chips, %d cpus, " |
7f510b46 BS |
1707 | "%d cpus/chip, select unit %d\n", |
1708 | current->comm, current->pid, | |
1709 | npresent, ncpus, ncpus / npresent, | |
1710 | prefunit); | |
1711 | } | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | /* | |
1716 | * user ports start at 1, kernel port is 0 | |
1717 | * For now, we do round-robin access across all chips | |
1718 | */ | |
1719 | ||
1720 | if (prefunit != -1) | |
1721 | devmax = prefunit + 1; | |
7f510b46 BS |
1722 | recheck: |
1723 | for (i = 1; i < maxofallports; i++) { | |
1724 | for (ndev = prefunit != -1 ? prefunit : 0; ndev < devmax; | |
1725 | ndev++) { | |
1726 | struct ipath_devdata *dd = ipath_lookup(ndev); | |
1727 | ||
1728 | if (!usable(dd)) | |
1729 | continue; /* can't use this unit */ | |
1730 | if (i >= dd->ipath_cfgports) | |
1731 | /* | |
1732 | * Maxed out on users of this unit. Try | |
1733 | * next. | |
1734 | */ | |
1735 | continue; | |
9929b0fb | 1736 | ret = try_alloc_port(dd, i, fp, uinfo); |
7f510b46 BS |
1737 | if (!ret) |
1738 | goto done; | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | if (npresent) { | |
1743 | if (nup == 0) { | |
1744 | ret = -ENETDOWN; | |
1745 | ipath_dbg("No ports available (none initialized " | |
1746 | "and ready)\n"); | |
1747 | } else { | |
1748 | if (prefunit > 0) { | |
1749 | /* if started above 0, retry from 0 */ | |
1750 | ipath_cdbg(PROC, | |
1751 | "%s[%u] no ports on prefunit " | |
1752 | "%d, clear and re-check\n", | |
1753 | current->comm, current->pid, | |
1754 | prefunit); | |
1755 | devmax = ipath_count_units(NULL, NULL, | |
1756 | NULL); | |
1757 | prefunit = -1; | |
1758 | goto recheck; | |
1759 | } | |
1760 | ret = -EBUSY; | |
1761 | ipath_dbg("No ports available\n"); | |
1762 | } | |
1763 | } else { | |
1764 | ret = -ENXIO; | |
1765 | ipath_dbg("No boards found\n"); | |
1766 | } | |
1767 | ||
1768 | done: | |
1769 | return ret; | |
1770 | } | |
1771 | ||
9929b0fb BS |
1772 | static int find_shared_port(struct file *fp, |
1773 | const struct ipath_user_info *uinfo) | |
1774 | { | |
1775 | int devmax, ndev, i; | |
1776 | int ret = 0; | |
1777 | ||
1778 | devmax = ipath_count_units(NULL, NULL, NULL); | |
1779 | ||
1780 | for (ndev = 0; ndev < devmax; ndev++) { | |
1781 | struct ipath_devdata *dd = ipath_lookup(ndev); | |
1782 | ||
5d1ce03d | 1783 | if (!usable(dd)) |
9929b0fb BS |
1784 | continue; |
1785 | for (i = 1; i < dd->ipath_cfgports; i++) { | |
1786 | struct ipath_portdata *pd = dd->ipath_pd[i]; | |
1787 | ||
1788 | /* Skip ports which are not yet open */ | |
1789 | if (!pd || !pd->port_cnt) | |
1790 | continue; | |
1791 | /* Skip port if it doesn't match the requested one */ | |
1792 | if (pd->port_subport_id != uinfo->spu_subport_id) | |
1793 | continue; | |
1794 | /* Verify the sharing process matches the master */ | |
1795 | if (pd->port_subport_cnt != uinfo->spu_subport_cnt || | |
1796 | pd->userversion != uinfo->spu_userversion || | |
1797 | pd->port_cnt >= pd->port_subport_cnt) { | |
1798 | ret = -EINVAL; | |
1799 | goto done; | |
1800 | } | |
1801 | port_fp(fp) = pd; | |
1802 | subport_fp(fp) = pd->port_cnt++; | |
40d97692 PE |
1803 | pd->port_subpid[subport_fp(fp)] = |
1804 | get_pid(task_pid(current)); | |
9929b0fb BS |
1805 | tidcursor_fp(fp) = 0; |
1806 | pd->active_slaves |= 1 << subport_fp(fp); | |
1807 | ipath_cdbg(PROC, | |
1808 | "%s[%u] %u sharing %s[%u] unit:port %u:%u\n", | |
1809 | current->comm, current->pid, | |
1810 | subport_fp(fp), | |
40d97692 | 1811 | pd->port_comm, pid_nr(pd->port_pid), |
9929b0fb BS |
1812 | dd->ipath_unit, pd->port_port); |
1813 | ret = 1; | |
1814 | goto done; | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | done: | |
1819 | return ret; | |
1820 | } | |
1821 | ||
7f510b46 BS |
1822 | static int ipath_open(struct inode *in, struct file *fp) |
1823 | { | |
c97d27d8 | 1824 | /* The real work is performed later in ipath_assign_port() */ |
9929b0fb BS |
1825 | fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL); |
1826 | return fp->private_data ? 0 : -ENOMEM; | |
1827 | } | |
1828 | ||
c97d27d8 BS |
1829 | /* Get port early, so can set affinity prior to memory allocation */ |
1830 | static int ipath_assign_port(struct file *fp, | |
9929b0fb BS |
1831 | const struct ipath_user_info *uinfo) |
1832 | { | |
1833 | int ret; | |
9929b0fb | 1834 | int i_minor; |
0df6291c | 1835 | unsigned swmajor, swminor; |
9929b0fb BS |
1836 | |
1837 | /* Check to be sure we haven't already initialized this file */ | |
1838 | if (port_fp(fp)) { | |
1839 | ret = -EINVAL; | |
1840 | goto done; | |
1841 | } | |
1842 | ||
1843 | /* for now, if major version is different, bail */ | |
0df6291c MD |
1844 | swmajor = uinfo->spu_userversion >> 16; |
1845 | if (swmajor != IPATH_USER_SWMAJOR) { | |
9929b0fb BS |
1846 | ipath_dbg("User major version %d not same as driver " |
1847 | "major %d\n", uinfo->spu_userversion >> 16, | |
1848 | IPATH_USER_SWMAJOR); | |
1849 | ret = -ENODEV; | |
1850 | goto done; | |
1851 | } | |
1852 | ||
1853 | swminor = uinfo->spu_userversion & 0xffff; | |
1854 | if (swminor != IPATH_USER_SWMINOR) | |
1855 | ipath_dbg("User minor version %d not same as driver " | |
1856 | "minor %d\n", swminor, IPATH_USER_SWMINOR); | |
7f510b46 BS |
1857 | |
1858 | mutex_lock(&ipath_mutex); | |
1859 | ||
0df6291c MD |
1860 | if (ipath_compatible_subports(swmajor, swminor) && |
1861 | uinfo->spu_subport_cnt && | |
9929b0fb | 1862 | (ret = find_shared_port(fp, uinfo))) { |
9929b0fb BS |
1863 | if (ret > 0) |
1864 | ret = 0; | |
124b4dcb | 1865 | goto done_chk_sdma; |
9929b0fb BS |
1866 | } |
1867 | ||
496ad9aa | 1868 | i_minor = iminor(file_inode(fp)) - IPATH_USER_MINOR_BASE; |
7f510b46 | 1869 | ipath_cdbg(VERBOSE, "open on dev %lx (minor %d)\n", |
496ad9aa | 1870 | (long)file_inode(fp)->i_rdev, i_minor); |
7f510b46 | 1871 | |
9929b0fb BS |
1872 | if (i_minor) |
1873 | ret = find_free_port(i_minor - 1, fp, uinfo); | |
7f510b46 | 1874 | else |
9929b0fb | 1875 | ret = find_best_unit(fp, uinfo); |
7f510b46 | 1876 | |
124b4dcb DO |
1877 | done_chk_sdma: |
1878 | if (!ret) { | |
1879 | struct ipath_filedata *fd = fp->private_data; | |
1880 | const struct ipath_portdata *pd = fd->pd; | |
1881 | const struct ipath_devdata *dd = pd->port_dd; | |
1882 | ||
1883 | fd->pq = ipath_user_sdma_queue_create(&dd->pcidev->dev, | |
1884 | dd->ipath_unit, | |
1885 | pd->port_port, | |
1886 | fd->subport); | |
1887 | ||
1888 | if (!fd->pq) | |
1889 | ret = -ENOMEM; | |
1890 | } | |
1891 | ||
7f510b46 | 1892 | mutex_unlock(&ipath_mutex); |
9929b0fb | 1893 | |
c97d27d8 BS |
1894 | done: |
1895 | return ret; | |
1896 | } | |
1897 | ||
1898 | ||
1899 | static int ipath_do_user_init(struct file *fp, | |
1900 | const struct ipath_user_info *uinfo) | |
1901 | { | |
1902 | int ret; | |
947d7617 | 1903 | struct ipath_portdata *pd = port_fp(fp); |
c97d27d8 BS |
1904 | struct ipath_devdata *dd; |
1905 | u32 head32; | |
9929b0fb | 1906 | |
947d7617 RC |
1907 | /* Subports don't need to initialize anything since master did it. */ |
1908 | if (subport_fp(fp)) { | |
1909 | ret = wait_event_interruptible(pd->port_wait, | |
1910 | !test_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag)); | |
1911 | goto done; | |
1912 | } | |
1913 | ||
9929b0fb BS |
1914 | dd = pd->port_dd; |
1915 | ||
1916 | if (uinfo->spu_rcvhdrsize) { | |
1917 | ret = ipath_setrcvhdrsize(dd, uinfo->spu_rcvhdrsize); | |
1918 | if (ret) | |
1919 | goto done; | |
1920 | } | |
1921 | ||
1922 | /* for now we do nothing with rcvhdrcnt: uinfo->spu_rcvhdrcnt */ | |
1923 | ||
e2ab41ca DO |
1924 | /* some ports may get extra buffers, calculate that here */ |
1925 | if (pd->port_port <= dd->ipath_ports_extrabuf) | |
1926 | pd->port_piocnt = dd->ipath_pbufsport + 1; | |
1927 | else | |
1928 | pd->port_piocnt = dd->ipath_pbufsport; | |
1929 | ||
9929b0fb | 1930 | /* for right now, kernel piobufs are at end, so port 1 is at 0 */ |
e2ab41ca DO |
1931 | if (pd->port_port <= dd->ipath_ports_extrabuf) |
1932 | pd->port_pio_base = (dd->ipath_pbufsport + 1) | |
1933 | * (pd->port_port - 1); | |
1934 | else | |
1935 | pd->port_pio_base = dd->ipath_ports_extrabuf + | |
1936 | dd->ipath_pbufsport * (pd->port_port - 1); | |
9929b0fb | 1937 | pd->port_piobufs = dd->ipath_piobufbase + |
e2ab41ca DO |
1938 | pd->port_pio_base * dd->ipath_palign; |
1939 | ipath_cdbg(VERBOSE, "piobuf base for port %u is 0x%x, piocnt %u," | |
1940 | " first pio %u\n", pd->port_port, pd->port_piobufs, | |
1941 | pd->port_piocnt, pd->port_pio_base); | |
1942 | ipath_chg_pioavailkernel(dd, pd->port_pio_base, pd->port_piocnt, 0); | |
9929b0fb BS |
1943 | |
1944 | /* | |
1945 | * Now allocate the rcvhdr Q and eager TIDs; skip the TID | |
1946 | * array for time being. If pd->port_port > chip-supported, | |
1947 | * we need to do extra stuff here to handle by handling overflow | |
1948 | * through port 0, someday | |
1949 | */ | |
1950 | ret = ipath_create_rcvhdrq(dd, pd); | |
1951 | if (!ret) | |
1952 | ret = ipath_create_user_egr(pd); | |
1953 | if (ret) | |
1954 | goto done; | |
1955 | ||
1956 | /* | |
1957 | * set the eager head register for this port to the current values | |
1958 | * of the tail pointers, since we don't know if they were | |
1959 | * updated on last use of the port. | |
1960 | */ | |
1961 | head32 = ipath_read_ureg32(dd, ur_rcvegrindextail, pd->port_port); | |
1962 | ipath_write_ureg(dd, ur_rcvegrindexhead, head32, pd->port_port); | |
755807a2 | 1963 | pd->port_lastrcvhdrqtail = -1; |
9929b0fb BS |
1964 | ipath_cdbg(VERBOSE, "Wrote port%d egrhead %x from tail regs\n", |
1965 | pd->port_port, head32); | |
1966 | pd->port_tidcursor = 0; /* start at beginning after open */ | |
70c51da2 AJ |
1967 | |
1968 | /* initialize poll variables... */ | |
1969 | pd->port_urgent = 0; | |
1970 | pd->port_urgent_poll = 0; | |
1971 | pd->port_hdrqfull_poll = pd->port_hdrqfull; | |
1972 | ||
9929b0fb | 1973 | /* |
9355fb6a RC |
1974 | * Now enable the port for receive. |
1975 | * For chips that are set to DMA the tail register to memory | |
1976 | * when they change (and when the update bit transitions from | |
1977 | * 0 to 1. So for those chips, we turn it off and then back on. | |
1978 | * This will (very briefly) affect any other open ports, but the | |
1979 | * duration is very short, and therefore isn't an issue. We | |
25985edc | 1980 | * explicitly set the in-memory tail copy to 0 beforehand, so we |
9355fb6a RC |
1981 | * don't have to wait to be sure the DMA update has happened |
1982 | * (chip resets head/tail to 0 on transition to enable). | |
9929b0fb | 1983 | */ |
d8274869 | 1984 | set_bit(dd->ipath_r_portenable_shift + pd->port_port, |
9929b0fb | 1985 | &dd->ipath_rcvctrl); |
9355fb6a RC |
1986 | if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) { |
1987 | if (pd->port_rcvhdrtail_kvaddr) | |
1988 | ipath_clear_rcvhdrtail(pd); | |
1989 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, | |
d8274869 DO |
1990 | dd->ipath_rcvctrl & |
1991 | ~(1ULL << dd->ipath_r_tailupd_shift)); | |
9355fb6a | 1992 | } |
9929b0fb BS |
1993 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, |
1994 | dd->ipath_rcvctrl); | |
947d7617 RC |
1995 | /* Notify any waiting slaves */ |
1996 | if (pd->port_subport_cnt) { | |
1997 | clear_bit(IPATH_PORT_MASTER_UNINIT, &pd->port_flag); | |
1998 | wake_up(&pd->port_wait); | |
1999 | } | |
9929b0fb | 2000 | done: |
7f510b46 BS |
2001 | return ret; |
2002 | } | |
2003 | ||
2004 | /** | |
2005 | * unlock_exptid - unlock any expected TID entries port still had in use | |
2006 | * @pd: port | |
2007 | * | |
2008 | * We don't actually update the chip here, because we do a bulk update | |
2009 | * below, using ipath_f_clear_tids. | |
2010 | */ | |
2011 | static void unlock_expected_tids(struct ipath_portdata *pd) | |
2012 | { | |
2013 | struct ipath_devdata *dd = pd->port_dd; | |
2014 | int port_tidbase = pd->port_port * dd->ipath_rcvtidcnt; | |
2015 | int i, cnt = 0, maxtid = port_tidbase + dd->ipath_rcvtidcnt; | |
2016 | ||
2017 | ipath_cdbg(VERBOSE, "Port %u unlocking any locked expTID pages\n", | |
2018 | pd->port_port); | |
2019 | for (i = port_tidbase; i < maxtid; i++) { | |
9355fb6a RC |
2020 | struct page *ps = dd->ipath_pageshadow[i]; |
2021 | ||
2022 | if (!ps) | |
7f510b46 BS |
2023 | continue; |
2024 | ||
9355fb6a | 2025 | dd->ipath_pageshadow[i] = NULL; |
1fd3b40f BS |
2026 | pci_unmap_page(dd->pcidev, dd->ipath_physshadow[i], |
2027 | PAGE_SIZE, PCI_DMA_FROMDEVICE); | |
9355fb6a | 2028 | ipath_release_user_pages_on_close(&ps, 1); |
7f510b46 BS |
2029 | cnt++; |
2030 | ipath_stats.sps_pageunlocks++; | |
2031 | } | |
2032 | if (cnt) | |
2033 | ipath_cdbg(VERBOSE, "Port %u locked %u expTID entries\n", | |
2034 | pd->port_port, cnt); | |
2035 | ||
2036 | if (ipath_stats.sps_pagelocks || ipath_stats.sps_pageunlocks) | |
2037 | ipath_cdbg(VERBOSE, "%llu pages locked, %llu unlocked\n", | |
2038 | (unsigned long long) ipath_stats.sps_pagelocks, | |
2039 | (unsigned long long) | |
2040 | ipath_stats.sps_pageunlocks); | |
2041 | } | |
2042 | ||
2043 | static int ipath_close(struct inode *in, struct file *fp) | |
2044 | { | |
2045 | int ret = 0; | |
9929b0fb | 2046 | struct ipath_filedata *fd; |
7f510b46 BS |
2047 | struct ipath_portdata *pd; |
2048 | struct ipath_devdata *dd; | |
3d089098 | 2049 | unsigned long flags; |
7f510b46 | 2050 | unsigned port; |
3d089098 | 2051 | struct pid *pid; |
7f510b46 BS |
2052 | |
2053 | ipath_cdbg(VERBOSE, "close on dev %lx, private data %p\n", | |
2054 | (long)in->i_rdev, fp->private_data); | |
2055 | ||
2056 | mutex_lock(&ipath_mutex); | |
2057 | ||
78e2c641 | 2058 | fd = fp->private_data; |
7f510b46 | 2059 | fp->private_data = NULL; |
9929b0fb BS |
2060 | pd = fd->pd; |
2061 | if (!pd) { | |
2062 | mutex_unlock(&ipath_mutex); | |
2063 | goto bail; | |
2064 | } | |
124b4dcb DO |
2065 | |
2066 | dd = pd->port_dd; | |
2067 | ||
2068 | /* drain user sdma queue */ | |
2069 | ipath_user_sdma_queue_drain(dd, fd->pq); | |
2070 | ipath_user_sdma_queue_destroy(fd->pq); | |
2071 | ||
9929b0fb BS |
2072 | if (--pd->port_cnt) { |
2073 | /* | |
2074 | * XXX If the master closes the port before the slave(s), | |
2075 | * revoke the mmap for the eager receive queue so | |
2076 | * the slave(s) don't wait for receive data forever. | |
2077 | */ | |
2078 | pd->active_slaves &= ~(1 << fd->subport); | |
40d97692 PE |
2079 | put_pid(pd->port_subpid[fd->subport]); |
2080 | pd->port_subpid[fd->subport] = NULL; | |
9929b0fb BS |
2081 | mutex_unlock(&ipath_mutex); |
2082 | goto bail; | |
2083 | } | |
3d089098 DO |
2084 | /* early; no interrupt users after this */ |
2085 | spin_lock_irqsave(&dd->ipath_uctxt_lock, flags); | |
9929b0fb | 2086 | port = pd->port_port; |
3d089098 DO |
2087 | dd->ipath_pd[port] = NULL; |
2088 | pid = pd->port_pid; | |
2089 | pd->port_pid = NULL; | |
2090 | spin_unlock_irqrestore(&dd->ipath_uctxt_lock, flags); | |
7f510b46 BS |
2091 | |
2092 | if (pd->port_rcvwait_to || pd->port_piowait_to | |
2093 | || pd->port_rcvnowait || pd->port_pionowait) { | |
2094 | ipath_cdbg(VERBOSE, "port%u, %u rcv, %u pio wait timeo; " | |
2095 | "%u rcv %u, pio already\n", | |
2096 | pd->port_port, pd->port_rcvwait_to, | |
2097 | pd->port_piowait_to, pd->port_rcvnowait, | |
2098 | pd->port_pionowait); | |
2099 | pd->port_rcvwait_to = pd->port_piowait_to = | |
2100 | pd->port_rcvnowait = pd->port_pionowait = 0; | |
2101 | } | |
2102 | if (pd->port_flag) { | |
bb917144 | 2103 | ipath_cdbg(PROC, "port %u port_flag set: 0x%lx\n", |
7f510b46 BS |
2104 | pd->port_port, pd->port_flag); |
2105 | pd->port_flag = 0; | |
2106 | } | |
2107 | ||
2108 | if (dd->ipath_kregbase) { | |
70c51da2 | 2109 | /* atomically clear receive enable port and intr avail. */ |
d8274869 | 2110 | clear_bit(dd->ipath_r_portenable_shift + port, |
35783ec0 | 2111 | &dd->ipath_rcvctrl); |
d8274869 | 2112 | clear_bit(pd->port_port + dd->ipath_r_intravail_shift, |
70c51da2 | 2113 | &dd->ipath_rcvctrl); |
35783ec0 BS |
2114 | ipath_write_kreg( dd, dd->ipath_kregs->kr_rcvctrl, |
2115 | dd->ipath_rcvctrl); | |
2116 | /* and read back from chip to be sure that nothing | |
2117 | * else is in flight when we do the rest */ | |
2118 | (void)ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); | |
7f510b46 BS |
2119 | |
2120 | /* clean up the pkeys for this port user */ | |
2121 | ipath_clean_part_key(pd, dd); | |
35783ec0 BS |
2122 | /* |
2123 | * be paranoid, and never write 0's to these, just use an | |
2124 | * unused part of the port 0 tail page. Of course, | |
2125 | * rcvhdraddr points to a large chunk of memory, so this | |
2126 | * could still trash things, but at least it won't trash | |
2127 | * page 0, and by disabling the port, it should stop "soon", | |
2128 | * even if a packet or two is in already in flight after we | |
2129 | * disabled the port. | |
2130 | */ | |
2131 | ipath_write_kreg_port(dd, | |
2132 | dd->ipath_kregs->kr_rcvhdrtailaddr, port, | |
2133 | dd->ipath_dummy_hdrq_phys); | |
2134 | ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdraddr, | |
2135 | pd->port_port, dd->ipath_dummy_hdrq_phys); | |
2136 | ||
e2ab41ca DO |
2137 | ipath_disarm_piobufs(dd, pd->port_pio_base, pd->port_piocnt); |
2138 | ipath_chg_pioavailkernel(dd, pd->port_pio_base, | |
2139 | pd->port_piocnt, 1); | |
35783ec0 | 2140 | |
1fd3b40f BS |
2141 | dd->ipath_f_clear_tids(dd, pd->port_port); |
2142 | ||
35783ec0 BS |
2143 | if (dd->ipath_pageshadow) |
2144 | unlock_expected_tids(pd); | |
2145 | ipath_stats.sps_ports--; | |
2146 | ipath_cdbg(PROC, "%s[%u] closed port %u:%u\n", | |
3d089098 | 2147 | pd->port_comm, pid_nr(pid), |
35783ec0 | 2148 | dd->ipath_unit, port); |
7f510b46 BS |
2149 | } |
2150 | ||
3d089098 | 2151 | put_pid(pid); |
7f510b46 | 2152 | mutex_unlock(&ipath_mutex); |
f37bda92 | 2153 | ipath_free_pddata(dd, pd); /* after releasing the mutex */ |
7f510b46 | 2154 | |
9929b0fb BS |
2155 | bail: |
2156 | kfree(fd); | |
7f510b46 BS |
2157 | return ret; |
2158 | } | |
2159 | ||
9929b0fb | 2160 | static int ipath_port_info(struct ipath_portdata *pd, u16 subport, |
7f510b46 BS |
2161 | struct ipath_port_info __user *uinfo) |
2162 | { | |
2163 | struct ipath_port_info info; | |
2164 | int nup; | |
2165 | int ret; | |
9929b0fb | 2166 | size_t sz; |
7f510b46 BS |
2167 | |
2168 | (void) ipath_count_units(NULL, &nup, NULL); | |
2169 | info.num_active = nup; | |
2170 | info.unit = pd->port_dd->ipath_unit; | |
2171 | info.port = pd->port_port; | |
9929b0fb BS |
2172 | info.subport = subport; |
2173 | /* Don't return new fields if old library opened the port. */ | |
0df6291c MD |
2174 | if (ipath_supports_subports(pd->userversion >> 16, |
2175 | pd->userversion & 0xffff)) { | |
9929b0fb BS |
2176 | /* Number of user ports available for this device. */ |
2177 | info.num_ports = pd->port_dd->ipath_cfgports - 1; | |
2178 | info.num_subports = pd->port_subport_cnt; | |
2179 | sz = sizeof(info); | |
2180 | } else | |
2181 | sz = sizeof(info) - 2 * sizeof(u16); | |
7f510b46 | 2182 | |
9929b0fb | 2183 | if (copy_to_user(uinfo, &info, sz)) { |
7f510b46 BS |
2184 | ret = -EFAULT; |
2185 | goto bail; | |
2186 | } | |
2187 | ret = 0; | |
2188 | ||
2189 | bail: | |
2190 | return ret; | |
2191 | } | |
2192 | ||
9929b0fb BS |
2193 | static int ipath_get_slave_info(struct ipath_portdata *pd, |
2194 | void __user *slave_mask_addr) | |
2195 | { | |
2196 | int ret = 0; | |
2197 | ||
2198 | if (copy_to_user(slave_mask_addr, &pd->active_slaves, sizeof(u32))) | |
2199 | ret = -EFAULT; | |
2200 | return ret; | |
2201 | } | |
2202 | ||
124b4dcb DO |
2203 | static int ipath_sdma_get_inflight(struct ipath_user_sdma_queue *pq, |
2204 | u32 __user *inflightp) | |
2205 | { | |
2206 | const u32 val = ipath_user_sdma_inflight_counter(pq); | |
2207 | ||
2208 | if (put_user(val, inflightp)) | |
2209 | return -EFAULT; | |
2210 | ||
2211 | return 0; | |
2212 | } | |
2213 | ||
2214 | static int ipath_sdma_get_complete(struct ipath_devdata *dd, | |
2215 | struct ipath_user_sdma_queue *pq, | |
2216 | u32 __user *completep) | |
2217 | { | |
2218 | u32 val; | |
2219 | int err; | |
2220 | ||
2221 | err = ipath_user_sdma_make_progress(dd, pq); | |
2222 | if (err < 0) | |
2223 | return err; | |
2224 | ||
2225 | val = ipath_user_sdma_complete_counter(pq); | |
2226 | if (put_user(val, completep)) | |
2227 | return -EFAULT; | |
2228 | ||
2229 | return 0; | |
2230 | } | |
2231 | ||
7f510b46 BS |
2232 | static ssize_t ipath_write(struct file *fp, const char __user *data, |
2233 | size_t count, loff_t *off) | |
2234 | { | |
2235 | const struct ipath_cmd __user *ucmd; | |
2236 | struct ipath_portdata *pd; | |
2237 | const void __user *src; | |
2238 | size_t consumed, copy; | |
2239 | struct ipath_cmd cmd; | |
2240 | ssize_t ret = 0; | |
2241 | void *dest; | |
2242 | ||
2243 | if (count < sizeof(cmd.type)) { | |
2244 | ret = -EINVAL; | |
2245 | goto bail; | |
2246 | } | |
2247 | ||
2248 | ucmd = (const struct ipath_cmd __user *) data; | |
2249 | ||
2250 | if (copy_from_user(&cmd.type, &ucmd->type, sizeof(cmd.type))) { | |
2251 | ret = -EFAULT; | |
2252 | goto bail; | |
2253 | } | |
2254 | ||
2255 | consumed = sizeof(cmd.type); | |
2256 | ||
2257 | switch (cmd.type) { | |
c97d27d8 BS |
2258 | case IPATH_CMD_ASSIGN_PORT: |
2259 | case __IPATH_CMD_USER_INIT: | |
7f510b46 BS |
2260 | case IPATH_CMD_USER_INIT: |
2261 | copy = sizeof(cmd.cmd.user_info); | |
2262 | dest = &cmd.cmd.user_info; | |
2263 | src = &ucmd->cmd.user_info; | |
2264 | break; | |
2265 | case IPATH_CMD_RECV_CTRL: | |
2266 | copy = sizeof(cmd.cmd.recv_ctrl); | |
2267 | dest = &cmd.cmd.recv_ctrl; | |
2268 | src = &ucmd->cmd.recv_ctrl; | |
2269 | break; | |
2270 | case IPATH_CMD_PORT_INFO: | |
2271 | copy = sizeof(cmd.cmd.port_info); | |
2272 | dest = &cmd.cmd.port_info; | |
2273 | src = &ucmd->cmd.port_info; | |
2274 | break; | |
2275 | case IPATH_CMD_TID_UPDATE: | |
2276 | case IPATH_CMD_TID_FREE: | |
2277 | copy = sizeof(cmd.cmd.tid_info); | |
2278 | dest = &cmd.cmd.tid_info; | |
2279 | src = &ucmd->cmd.tid_info; | |
2280 | break; | |
2281 | case IPATH_CMD_SET_PART_KEY: | |
2282 | copy = sizeof(cmd.cmd.part_key); | |
2283 | dest = &cmd.cmd.part_key; | |
2284 | src = &ucmd->cmd.part_key; | |
2285 | break; | |
c7e29ff1 | 2286 | case __IPATH_CMD_SLAVE_INFO: |
9929b0fb BS |
2287 | copy = sizeof(cmd.cmd.slave_mask_addr); |
2288 | dest = &cmd.cmd.slave_mask_addr; | |
2289 | src = &ucmd->cmd.slave_mask_addr; | |
2290 | break; | |
569b87b4 AJ |
2291 | case IPATH_CMD_PIOAVAILUPD: // force an update of PIOAvail reg |
2292 | copy = 0; | |
2293 | src = NULL; | |
2294 | dest = NULL; | |
2295 | break; | |
f2d04231 RW |
2296 | case IPATH_CMD_POLL_TYPE: |
2297 | copy = sizeof(cmd.cmd.poll_type); | |
2298 | dest = &cmd.cmd.poll_type; | |
2299 | src = &ucmd->cmd.poll_type; | |
2300 | break; | |
6ac50727 DO |
2301 | case IPATH_CMD_ARMLAUNCH_CTRL: |
2302 | copy = sizeof(cmd.cmd.armlaunch_ctrl); | |
2303 | dest = &cmd.cmd.armlaunch_ctrl; | |
2304 | src = &ucmd->cmd.armlaunch_ctrl; | |
2305 | break; | |
124b4dcb DO |
2306 | case IPATH_CMD_SDMA_INFLIGHT: |
2307 | copy = sizeof(cmd.cmd.sdma_inflight); | |
2308 | dest = &cmd.cmd.sdma_inflight; | |
2309 | src = &ucmd->cmd.sdma_inflight; | |
2310 | break; | |
2311 | case IPATH_CMD_SDMA_COMPLETE: | |
2312 | copy = sizeof(cmd.cmd.sdma_complete); | |
2313 | dest = &cmd.cmd.sdma_complete; | |
2314 | src = &ucmd->cmd.sdma_complete; | |
2315 | break; | |
7f510b46 BS |
2316 | default: |
2317 | ret = -EINVAL; | |
2318 | goto bail; | |
2319 | } | |
2320 | ||
569b87b4 AJ |
2321 | if (copy) { |
2322 | if ((count - consumed) < copy) { | |
2323 | ret = -EINVAL; | |
2324 | goto bail; | |
2325 | } | |
7f510b46 | 2326 | |
569b87b4 AJ |
2327 | if (copy_from_user(dest, src, copy)) { |
2328 | ret = -EFAULT; | |
2329 | goto bail; | |
2330 | } | |
2331 | ||
2332 | consumed += copy; | |
7f510b46 BS |
2333 | } |
2334 | ||
7f510b46 | 2335 | pd = port_fp(fp); |
c97d27d8 BS |
2336 | if (!pd && cmd.type != __IPATH_CMD_USER_INIT && |
2337 | cmd.type != IPATH_CMD_ASSIGN_PORT) { | |
9929b0fb BS |
2338 | ret = -EINVAL; |
2339 | goto bail; | |
2340 | } | |
7f510b46 BS |
2341 | |
2342 | switch (cmd.type) { | |
c97d27d8 BS |
2343 | case IPATH_CMD_ASSIGN_PORT: |
2344 | ret = ipath_assign_port(fp, &cmd.cmd.user_info); | |
2345 | if (ret) | |
2346 | goto bail; | |
2347 | break; | |
2348 | case __IPATH_CMD_USER_INIT: | |
2349 | /* backwards compatibility, get port first */ | |
2350 | ret = ipath_assign_port(fp, &cmd.cmd.user_info); | |
2351 | if (ret) | |
2352 | goto bail; | |
2353 | /* and fall through to current version. */ | |
7f510b46 | 2354 | case IPATH_CMD_USER_INIT: |
9929b0fb BS |
2355 | ret = ipath_do_user_init(fp, &cmd.cmd.user_info); |
2356 | if (ret) | |
7f510b46 BS |
2357 | goto bail; |
2358 | ret = ipath_get_base_info( | |
9929b0fb | 2359 | fp, (void __user *) (unsigned long) |
7f510b46 BS |
2360 | cmd.cmd.user_info.spu_base_info, |
2361 | cmd.cmd.user_info.spu_base_info_size); | |
2362 | break; | |
2363 | case IPATH_CMD_RECV_CTRL: | |
9929b0fb | 2364 | ret = ipath_manage_rcvq(pd, subport_fp(fp), cmd.cmd.recv_ctrl); |
7f510b46 BS |
2365 | break; |
2366 | case IPATH_CMD_PORT_INFO: | |
9929b0fb | 2367 | ret = ipath_port_info(pd, subport_fp(fp), |
7f510b46 BS |
2368 | (struct ipath_port_info __user *) |
2369 | (unsigned long) cmd.cmd.port_info); | |
2370 | break; | |
2371 | case IPATH_CMD_TID_UPDATE: | |
9929b0fb | 2372 | ret = ipath_tid_update(pd, fp, &cmd.cmd.tid_info); |
7f510b46 BS |
2373 | break; |
2374 | case IPATH_CMD_TID_FREE: | |
9929b0fb | 2375 | ret = ipath_tid_free(pd, subport_fp(fp), &cmd.cmd.tid_info); |
7f510b46 BS |
2376 | break; |
2377 | case IPATH_CMD_SET_PART_KEY: | |
2378 | ret = ipath_set_part_key(pd, cmd.cmd.part_key); | |
2379 | break; | |
c7e29ff1 | 2380 | case __IPATH_CMD_SLAVE_INFO: |
9929b0fb BS |
2381 | ret = ipath_get_slave_info(pd, |
2382 | (void __user *) (unsigned long) | |
2383 | cmd.cmd.slave_mask_addr); | |
2384 | break; | |
569b87b4 | 2385 | case IPATH_CMD_PIOAVAILUPD: |
c4b4d16e | 2386 | ipath_force_pio_avail_update(pd->port_dd); |
569b87b4 | 2387 | break; |
f2d04231 RW |
2388 | case IPATH_CMD_POLL_TYPE: |
2389 | pd->poll_type = cmd.cmd.poll_type; | |
2390 | break; | |
6ac50727 DO |
2391 | case IPATH_CMD_ARMLAUNCH_CTRL: |
2392 | if (cmd.cmd.armlaunch_ctrl) | |
2393 | ipath_enable_armlaunch(pd->port_dd); | |
2394 | else | |
2395 | ipath_disable_armlaunch(pd->port_dd); | |
2396 | break; | |
124b4dcb DO |
2397 | case IPATH_CMD_SDMA_INFLIGHT: |
2398 | ret = ipath_sdma_get_inflight(user_sdma_queue_fp(fp), | |
2399 | (u32 __user *) (unsigned long) | |
2400 | cmd.cmd.sdma_inflight); | |
2401 | break; | |
2402 | case IPATH_CMD_SDMA_COMPLETE: | |
2403 | ret = ipath_sdma_get_complete(pd->port_dd, | |
2404 | user_sdma_queue_fp(fp), | |
2405 | (u32 __user *) (unsigned long) | |
2406 | cmd.cmd.sdma_complete); | |
2407 | break; | |
7f510b46 BS |
2408 | } |
2409 | ||
2410 | if (ret >= 0) | |
2411 | ret = consumed; | |
2412 | ||
2413 | bail: | |
2414 | return ret; | |
2415 | } | |
2416 | ||
124b4dcb DO |
2417 | static ssize_t ipath_writev(struct kiocb *iocb, const struct iovec *iov, |
2418 | unsigned long dim, loff_t off) | |
2419 | { | |
2420 | struct file *filp = iocb->ki_filp; | |
2421 | struct ipath_filedata *fp = filp->private_data; | |
2422 | struct ipath_portdata *pd = port_fp(filp); | |
2423 | struct ipath_user_sdma_queue *pq = fp->pq; | |
2424 | ||
2425 | if (!dim) | |
2426 | return -EINVAL; | |
2427 | ||
2428 | return ipath_user_sdma_writev(pd->port_dd, pq, iov, dim); | |
2429 | } | |
2430 | ||
7f510b46 BS |
2431 | static struct class *ipath_class; |
2432 | ||
2b8693c0 | 2433 | static int init_cdev(int minor, char *name, const struct file_operations *fops, |
f4e91eb4 | 2434 | struct cdev **cdevp, struct device **devp) |
7f510b46 BS |
2435 | { |
2436 | const dev_t dev = MKDEV(IPATH_MAJOR, minor); | |
2437 | struct cdev *cdev = NULL; | |
f4e91eb4 | 2438 | struct device *device = NULL; |
7f510b46 BS |
2439 | int ret; |
2440 | ||
2441 | cdev = cdev_alloc(); | |
2442 | if (!cdev) { | |
2443 | printk(KERN_ERR IPATH_DRV_NAME | |
2444 | ": Could not allocate cdev for minor %d, %s\n", | |
2445 | minor, name); | |
2446 | ret = -ENOMEM; | |
2447 | goto done; | |
2448 | } | |
2449 | ||
2450 | cdev->owner = THIS_MODULE; | |
2451 | cdev->ops = fops; | |
2452 | kobject_set_name(&cdev->kobj, name); | |
2453 | ||
2454 | ret = cdev_add(cdev, dev, 1); | |
2455 | if (ret < 0) { | |
2456 | printk(KERN_ERR IPATH_DRV_NAME | |
2457 | ": Could not add cdev for minor %d, %s (err %d)\n", | |
2458 | minor, name, -ret); | |
2459 | goto err_cdev; | |
2460 | } | |
2461 | ||
91bd418f | 2462 | device = device_create(ipath_class, NULL, dev, NULL, name); |
7f510b46 | 2463 | |
f4e91eb4 TJ |
2464 | if (IS_ERR(device)) { |
2465 | ret = PTR_ERR(device); | |
7f510b46 | 2466 | printk(KERN_ERR IPATH_DRV_NAME ": Could not create " |
f4e91eb4 | 2467 | "device for minor %d, %s (err %d)\n", |
7f510b46 BS |
2468 | minor, name, -ret); |
2469 | goto err_cdev; | |
2470 | } | |
2471 | ||
2472 | goto done; | |
2473 | ||
2474 | err_cdev: | |
2475 | cdev_del(cdev); | |
2476 | cdev = NULL; | |
2477 | ||
2478 | done: | |
2479 | if (ret >= 0) { | |
2480 | *cdevp = cdev; | |
f4e91eb4 | 2481 | *devp = device; |
7f510b46 BS |
2482 | } else { |
2483 | *cdevp = NULL; | |
f4e91eb4 | 2484 | *devp = NULL; |
7f510b46 BS |
2485 | } |
2486 | ||
2487 | return ret; | |
2488 | } | |
2489 | ||
2b8693c0 | 2490 | int ipath_cdev_init(int minor, char *name, const struct file_operations *fops, |
f4e91eb4 | 2491 | struct cdev **cdevp, struct device **devp) |
7f510b46 | 2492 | { |
f4e91eb4 | 2493 | return init_cdev(minor, name, fops, cdevp, devp); |
7f510b46 BS |
2494 | } |
2495 | ||
2496 | static void cleanup_cdev(struct cdev **cdevp, | |
f4e91eb4 | 2497 | struct device **devp) |
7f510b46 | 2498 | { |
f4e91eb4 | 2499 | struct device *dev = *devp; |
7f510b46 | 2500 | |
f4e91eb4 TJ |
2501 | if (dev) { |
2502 | device_unregister(dev); | |
2503 | *devp = NULL; | |
7f510b46 BS |
2504 | } |
2505 | ||
2506 | if (*cdevp) { | |
2507 | cdev_del(*cdevp); | |
2508 | *cdevp = NULL; | |
2509 | } | |
2510 | } | |
2511 | ||
2512 | void ipath_cdev_cleanup(struct cdev **cdevp, | |
f4e91eb4 | 2513 | struct device **devp) |
7f510b46 | 2514 | { |
f4e91eb4 | 2515 | cleanup_cdev(cdevp, devp); |
7f510b46 BS |
2516 | } |
2517 | ||
2518 | static struct cdev *wildcard_cdev; | |
f4e91eb4 | 2519 | static struct device *wildcard_dev; |
7f510b46 BS |
2520 | |
2521 | static const dev_t dev = MKDEV(IPATH_MAJOR, 0); | |
2522 | ||
2523 | static int user_init(void) | |
2524 | { | |
2525 | int ret; | |
2526 | ||
2527 | ret = register_chrdev_region(dev, IPATH_NMINORS, IPATH_DRV_NAME); | |
2528 | if (ret < 0) { | |
2529 | printk(KERN_ERR IPATH_DRV_NAME ": Could not register " | |
2530 | "chrdev region (err %d)\n", -ret); | |
2531 | goto done; | |
2532 | } | |
2533 | ||
2534 | ipath_class = class_create(THIS_MODULE, IPATH_DRV_NAME); | |
2535 | ||
2536 | if (IS_ERR(ipath_class)) { | |
2537 | ret = PTR_ERR(ipath_class); | |
2538 | printk(KERN_ERR IPATH_DRV_NAME ": Could not create " | |
2539 | "device class (err %d)\n", -ret); | |
2540 | goto bail; | |
2541 | } | |
2542 | ||
2543 | goto done; | |
2544 | bail: | |
2545 | unregister_chrdev_region(dev, IPATH_NMINORS); | |
2546 | done: | |
2547 | return ret; | |
2548 | } | |
2549 | ||
2550 | static void user_cleanup(void) | |
2551 | { | |
2552 | if (ipath_class) { | |
2553 | class_destroy(ipath_class); | |
2554 | ipath_class = NULL; | |
2555 | } | |
2556 | ||
2557 | unregister_chrdev_region(dev, IPATH_NMINORS); | |
2558 | } | |
2559 | ||
2560 | static atomic_t user_count = ATOMIC_INIT(0); | |
2561 | static atomic_t user_setup = ATOMIC_INIT(0); | |
2562 | ||
2563 | int ipath_user_add(struct ipath_devdata *dd) | |
2564 | { | |
2565 | char name[10]; | |
2566 | int ret; | |
2567 | ||
2568 | if (atomic_inc_return(&user_count) == 1) { | |
2569 | ret = user_init(); | |
2570 | if (ret < 0) { | |
2571 | ipath_dev_err(dd, "Unable to set up user support: " | |
2572 | "error %d\n", -ret); | |
2573 | goto bail; | |
2574 | } | |
7f510b46 | 2575 | ret = init_cdev(0, "ipath", &ipath_file_ops, &wildcard_cdev, |
f4e91eb4 | 2576 | &wildcard_dev); |
7f510b46 BS |
2577 | if (ret < 0) { |
2578 | ipath_dev_err(dd, "Could not create wildcard " | |
2579 | "minor: error %d\n", -ret); | |
0fd41363 | 2580 | goto bail_user; |
7f510b46 BS |
2581 | } |
2582 | ||
2583 | atomic_set(&user_setup, 1); | |
2584 | } | |
2585 | ||
2586 | snprintf(name, sizeof(name), "ipath%d", dd->ipath_unit); | |
2587 | ||
2588 | ret = init_cdev(dd->ipath_unit + 1, name, &ipath_file_ops, | |
f4e91eb4 | 2589 | &dd->user_cdev, &dd->user_dev); |
7f510b46 BS |
2590 | if (ret < 0) |
2591 | ipath_dev_err(dd, "Could not create user minor %d, %s\n", | |
2592 | dd->ipath_unit + 1, name); | |
2593 | ||
2594 | goto bail; | |
2595 | ||
0fd41363 | 2596 | bail_user: |
7f510b46 BS |
2597 | user_cleanup(); |
2598 | bail: | |
2599 | return ret; | |
2600 | } | |
2601 | ||
a2acb2ff | 2602 | void ipath_user_remove(struct ipath_devdata *dd) |
7f510b46 | 2603 | { |
f4e91eb4 | 2604 | cleanup_cdev(&dd->user_cdev, &dd->user_dev); |
7f510b46 BS |
2605 | |
2606 | if (atomic_dec_return(&user_count) == 0) { | |
2607 | if (atomic_read(&user_setup) == 0) | |
2608 | goto bail; | |
2609 | ||
f4e91eb4 | 2610 | cleanup_cdev(&wildcard_cdev, &wildcard_dev); |
7f510b46 BS |
2611 | user_cleanup(); |
2612 | ||
2613 | atomic_set(&user_setup, 0); | |
2614 | } | |
2615 | bail: | |
2616 | return; | |
2617 | } |