]>
Commit | Line | Data |
---|---|---|
77241056 | 1 | /* |
05d6ac1d | 2 | * Copyright(c) 2015, 2016 Intel Corporation. |
77241056 MM |
3 | * |
4 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
5 | * redistributing this file, you may do so under either license. | |
6 | * | |
7 | * GPL LICENSE SUMMARY | |
8 | * | |
77241056 MM |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * BSD LICENSE | |
19 | * | |
77241056 MM |
20 | * Redistribution and use in source and binary forms, with or without |
21 | * modification, are permitted provided that the following conditions | |
22 | * are met: | |
23 | * | |
24 | * - Redistributions of source code must retain the above copyright | |
25 | * notice, this list of conditions and the following disclaimer. | |
26 | * - Redistributions in binary form must reproduce the above copyright | |
27 | * notice, this list of conditions and the following disclaimer in | |
28 | * the documentation and/or other materials provided with the | |
29 | * distribution. | |
30 | * - Neither the name of Intel Corporation nor the names of its | |
31 | * contributors may be used to endorse or promote products derived | |
32 | * from this software without specific prior written permission. | |
33 | * | |
34 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
35 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
36 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
37 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
38 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
39 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
40 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
41 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
42 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
43 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
44 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
45 | * | |
46 | */ | |
77241056 MM |
47 | #include <linux/poll.h> |
48 | #include <linux/cdev.h> | |
77241056 | 49 | #include <linux/vmalloc.h> |
77241056 | 50 | #include <linux/io.h> |
77241056 | 51 | |
e6bd18f5 JG |
52 | #include <rdma/ib.h> |
53 | ||
77241056 MM |
54 | #include "hfi.h" |
55 | #include "pio.h" | |
56 | #include "device.h" | |
57 | #include "common.h" | |
58 | #include "trace.h" | |
59 | #include "user_sdma.h" | |
701e441d | 60 | #include "user_exp_rcv.h" |
affa48de | 61 | #include "aspm.h" |
06e0ffa6 | 62 | #include "mmu_rb.h" |
77241056 MM |
63 | |
64 | #undef pr_fmt | |
65 | #define pr_fmt(fmt) DRIVER_NAME ": " fmt | |
66 | ||
67 | #define SEND_CTXT_HALT_TIMEOUT 1000 /* msecs */ | |
68 | ||
69 | /* | |
70 | * File operation functions | |
71 | */ | |
72 | static int hfi1_file_open(struct inode *, struct file *); | |
73 | static int hfi1_file_close(struct inode *, struct file *); | |
77241056 MM |
74 | static ssize_t hfi1_write_iter(struct kiocb *, struct iov_iter *); |
75 | static unsigned int hfi1_poll(struct file *, struct poll_table_struct *); | |
76 | static int hfi1_file_mmap(struct file *, struct vm_area_struct *); | |
77 | ||
78 | static u64 kvirt_to_phys(void *); | |
79 | static int assign_ctxt(struct file *, struct hfi1_user_info *); | |
80 | static int init_subctxts(struct hfi1_ctxtdata *, const struct hfi1_user_info *); | |
81 | static int user_init(struct file *); | |
82 | static int get_ctxt_info(struct file *, void __user *, __u32); | |
83 | static int get_base_info(struct file *, void __user *, __u32); | |
84 | static int setup_ctxt(struct file *); | |
85 | static int setup_subctxt(struct hfi1_ctxtdata *); | |
0eb62659 | 86 | static int get_user_context(struct file *, struct hfi1_user_info *, int); |
77241056 MM |
87 | static int find_shared_ctxt(struct file *, const struct hfi1_user_info *); |
88 | static int allocate_ctxt(struct file *, struct hfi1_devdata *, | |
89 | struct hfi1_user_info *); | |
90 | static unsigned int poll_urgent(struct file *, struct poll_table_struct *); | |
91 | static unsigned int poll_next(struct file *, struct poll_table_struct *); | |
92 | static int user_event_ack(struct hfi1_ctxtdata *, int, unsigned long); | |
93 | static int set_ctxt_pkey(struct hfi1_ctxtdata *, unsigned, u16); | |
94 | static int manage_rcvq(struct hfi1_ctxtdata *, unsigned, int); | |
11bac800 | 95 | static int vma_fault(struct vm_fault *); |
8d970cf9 DD |
96 | static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, |
97 | unsigned long arg); | |
77241056 MM |
98 | |
99 | static const struct file_operations hfi1_file_ops = { | |
100 | .owner = THIS_MODULE, | |
77241056 MM |
101 | .write_iter = hfi1_write_iter, |
102 | .open = hfi1_file_open, | |
103 | .release = hfi1_file_close, | |
8d970cf9 | 104 | .unlocked_ioctl = hfi1_file_ioctl, |
77241056 MM |
105 | .poll = hfi1_poll, |
106 | .mmap = hfi1_file_mmap, | |
107 | .llseek = noop_llseek, | |
108 | }; | |
109 | ||
110 | static struct vm_operations_struct vm_ops = { | |
111 | .fault = vma_fault, | |
112 | }; | |
113 | ||
114 | /* | |
115 | * Types of memories mapped into user processes' space | |
116 | */ | |
117 | enum mmap_types { | |
118 | PIO_BUFS = 1, | |
119 | PIO_BUFS_SOP, | |
120 | PIO_CRED, | |
121 | RCV_HDRQ, | |
122 | RCV_EGRBUF, | |
123 | UREGS, | |
124 | EVENTS, | |
125 | STATUS, | |
126 | RTAIL, | |
127 | SUBCTXT_UREGS, | |
128 | SUBCTXT_RCV_HDRQ, | |
129 | SUBCTXT_EGRBUF, | |
130 | SDMA_COMP | |
131 | }; | |
132 | ||
133 | /* | |
134 | * Masks and offsets defining the mmap tokens | |
135 | */ | |
136 | #define HFI1_MMAP_OFFSET_MASK 0xfffULL | |
137 | #define HFI1_MMAP_OFFSET_SHIFT 0 | |
138 | #define HFI1_MMAP_SUBCTXT_MASK 0xfULL | |
139 | #define HFI1_MMAP_SUBCTXT_SHIFT 12 | |
140 | #define HFI1_MMAP_CTXT_MASK 0xffULL | |
141 | #define HFI1_MMAP_CTXT_SHIFT 16 | |
142 | #define HFI1_MMAP_TYPE_MASK 0xfULL | |
143 | #define HFI1_MMAP_TYPE_SHIFT 24 | |
144 | #define HFI1_MMAP_MAGIC_MASK 0xffffffffULL | |
145 | #define HFI1_MMAP_MAGIC_SHIFT 32 | |
146 | ||
147 | #define HFI1_MMAP_MAGIC 0xdabbad00 | |
148 | ||
149 | #define HFI1_MMAP_TOKEN_SET(field, val) \ | |
150 | (((val) & HFI1_MMAP_##field##_MASK) << HFI1_MMAP_##field##_SHIFT) | |
151 | #define HFI1_MMAP_TOKEN_GET(field, token) \ | |
152 | (((token) >> HFI1_MMAP_##field##_SHIFT) & HFI1_MMAP_##field##_MASK) | |
153 | #define HFI1_MMAP_TOKEN(type, ctxt, subctxt, addr) \ | |
154 | (HFI1_MMAP_TOKEN_SET(MAGIC, HFI1_MMAP_MAGIC) | \ | |
155 | HFI1_MMAP_TOKEN_SET(TYPE, type) | \ | |
156 | HFI1_MMAP_TOKEN_SET(CTXT, ctxt) | \ | |
157 | HFI1_MMAP_TOKEN_SET(SUBCTXT, subctxt) | \ | |
e260e404 | 158 | HFI1_MMAP_TOKEN_SET(OFFSET, (offset_in_page(addr)))) |
77241056 | 159 | |
77241056 MM |
160 | #define dbg(fmt, ...) \ |
161 | pr_info(fmt, ##__VA_ARGS__) | |
162 | ||
77241056 MM |
163 | static inline int is_valid_mmap(u64 token) |
164 | { | |
165 | return (HFI1_MMAP_TOKEN_GET(MAGIC, token) == HFI1_MMAP_MAGIC); | |
166 | } | |
167 | ||
168 | static int hfi1_file_open(struct inode *inode, struct file *fp) | |
169 | { | |
ea3a0ee5 | 170 | struct hfi1_filedata *fd; |
e11ffbd5 DD |
171 | struct hfi1_devdata *dd = container_of(inode->i_cdev, |
172 | struct hfi1_devdata, | |
173 | user_cdev); | |
174 | ||
acd7c8fe TS |
175 | if (!atomic_inc_not_zero(&dd->user_refcount)) |
176 | return -ENXIO; | |
177 | ||
e11ffbd5 DD |
178 | /* Just take a ref now. Not all opens result in a context assign */ |
179 | kobject_get(&dd->kobj); | |
180 | ||
77241056 | 181 | /* The real work is performed later in assign_ctxt() */ |
ea3a0ee5 IW |
182 | |
183 | fd = kzalloc(sizeof(*fd), GFP_KERNEL); | |
184 | ||
3faa3d9a IW |
185 | if (fd) { |
186 | fd->rec_cpu_num = -1; /* no cpu affinity by default */ | |
187 | fd->mm = current->mm; | |
f1f10076 | 188 | mmgrab(fd->mm); |
acd7c8fe TS |
189 | fp->private_data = fd; |
190 | } else { | |
191 | fp->private_data = NULL; | |
192 | ||
193 | if (atomic_dec_and_test(&dd->user_refcount)) | |
194 | complete(&dd->user_comp); | |
ea3a0ee5 | 195 | |
acd7c8fe TS |
196 | return -ENOMEM; |
197 | } | |
ea3a0ee5 | 198 | |
acd7c8fe | 199 | return 0; |
77241056 MM |
200 | } |
201 | ||
8d970cf9 DD |
202 | static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, |
203 | unsigned long arg) | |
204 | { | |
205 | struct hfi1_filedata *fd = fp->private_data; | |
206 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
207 | struct hfi1_user_info uinfo; | |
208 | struct hfi1_tid_info tinfo; | |
209 | int ret = 0; | |
210 | unsigned long addr; | |
211 | int uval = 0; | |
212 | unsigned long ul_uval = 0; | |
213 | u16 uval16 = 0; | |
214 | ||
8a1882eb | 215 | hfi1_cdbg(IOCTL, "IOCTL recv: 0x%x", cmd); |
8d970cf9 DD |
216 | if (cmd != HFI1_IOCTL_ASSIGN_CTXT && |
217 | cmd != HFI1_IOCTL_GET_VERS && | |
218 | !uctxt) | |
219 | return -EINVAL; | |
220 | ||
221 | switch (cmd) { | |
222 | case HFI1_IOCTL_ASSIGN_CTXT: | |
ca2f30a0 IW |
223 | if (uctxt) |
224 | return -EINVAL; | |
225 | ||
8d970cf9 DD |
226 | if (copy_from_user(&uinfo, |
227 | (struct hfi1_user_info __user *)arg, | |
228 | sizeof(uinfo))) | |
229 | return -EFAULT; | |
230 | ||
231 | ret = assign_ctxt(fp, &uinfo); | |
232 | if (ret < 0) | |
233 | return ret; | |
57bb562a | 234 | ret = setup_ctxt(fp); |
8d970cf9 DD |
235 | if (ret) |
236 | return ret; | |
237 | ret = user_init(fp); | |
238 | break; | |
239 | case HFI1_IOCTL_CTXT_INFO: | |
240 | ret = get_ctxt_info(fp, (void __user *)(unsigned long)arg, | |
241 | sizeof(struct hfi1_ctxt_info)); | |
242 | break; | |
243 | case HFI1_IOCTL_USER_INFO: | |
244 | ret = get_base_info(fp, (void __user *)(unsigned long)arg, | |
245 | sizeof(struct hfi1_base_info)); | |
246 | break; | |
247 | case HFI1_IOCTL_CREDIT_UPD: | |
f7ca535b | 248 | if (uctxt) |
8d970cf9 DD |
249 | sc_return_credits(uctxt->sc); |
250 | break; | |
251 | ||
252 | case HFI1_IOCTL_TID_UPDATE: | |
253 | if (copy_from_user(&tinfo, | |
254 | (struct hfi11_tid_info __user *)arg, | |
255 | sizeof(tinfo))) | |
256 | return -EFAULT; | |
257 | ||
258 | ret = hfi1_user_exp_rcv_setup(fp, &tinfo); | |
259 | if (!ret) { | |
260 | /* | |
261 | * Copy the number of tidlist entries we used | |
262 | * and the length of the buffer we registered. | |
263 | * These fields are adjacent in the structure so | |
264 | * we can copy them at the same time. | |
265 | */ | |
266 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
267 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
268 | sizeof(tinfo.tidcnt) + | |
269 | sizeof(tinfo.length))) | |
270 | ret = -EFAULT; | |
271 | } | |
272 | break; | |
273 | ||
274 | case HFI1_IOCTL_TID_FREE: | |
275 | if (copy_from_user(&tinfo, | |
276 | (struct hfi11_tid_info __user *)arg, | |
277 | sizeof(tinfo))) | |
278 | return -EFAULT; | |
279 | ||
280 | ret = hfi1_user_exp_rcv_clear(fp, &tinfo); | |
281 | if (ret) | |
282 | break; | |
283 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
284 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
285 | sizeof(tinfo.tidcnt))) | |
286 | ret = -EFAULT; | |
287 | break; | |
288 | ||
289 | case HFI1_IOCTL_TID_INVAL_READ: | |
290 | if (copy_from_user(&tinfo, | |
291 | (struct hfi11_tid_info __user *)arg, | |
292 | sizeof(tinfo))) | |
293 | return -EFAULT; | |
294 | ||
295 | ret = hfi1_user_exp_rcv_invalid(fp, &tinfo); | |
296 | if (ret) | |
297 | break; | |
298 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
299 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
300 | sizeof(tinfo.tidcnt))) | |
301 | ret = -EFAULT; | |
302 | break; | |
303 | ||
304 | case HFI1_IOCTL_RECV_CTRL: | |
305 | ret = get_user(uval, (int __user *)arg); | |
306 | if (ret != 0) | |
307 | return -EFAULT; | |
308 | ret = manage_rcvq(uctxt, fd->subctxt, uval); | |
309 | break; | |
310 | ||
311 | case HFI1_IOCTL_POLL_TYPE: | |
312 | ret = get_user(uval, (int __user *)arg); | |
313 | if (ret != 0) | |
314 | return -EFAULT; | |
315 | uctxt->poll_type = (typeof(uctxt->poll_type))uval; | |
316 | break; | |
317 | ||
318 | case HFI1_IOCTL_ACK_EVENT: | |
319 | ret = get_user(ul_uval, (unsigned long __user *)arg); | |
320 | if (ret != 0) | |
321 | return -EFAULT; | |
322 | ret = user_event_ack(uctxt, fd->subctxt, ul_uval); | |
323 | break; | |
324 | ||
325 | case HFI1_IOCTL_SET_PKEY: | |
326 | ret = get_user(uval16, (u16 __user *)arg); | |
327 | if (ret != 0) | |
328 | return -EFAULT; | |
329 | if (HFI1_CAP_IS_USET(PKEY_CHECK)) | |
330 | ret = set_ctxt_pkey(uctxt, fd->subctxt, uval16); | |
331 | else | |
332 | return -EPERM; | |
333 | break; | |
334 | ||
335 | case HFI1_IOCTL_CTXT_RESET: { | |
336 | struct send_context *sc; | |
337 | struct hfi1_devdata *dd; | |
338 | ||
339 | if (!uctxt || !uctxt->dd || !uctxt->sc) | |
340 | return -EINVAL; | |
341 | ||
342 | /* | |
343 | * There is no protection here. User level has to | |
344 | * guarantee that no one will be writing to the send | |
345 | * context while it is being re-initialized. | |
346 | * If user level breaks that guarantee, it will break | |
347 | * it's own context and no one else's. | |
348 | */ | |
349 | dd = uctxt->dd; | |
350 | sc = uctxt->sc; | |
351 | /* | |
352 | * Wait until the interrupt handler has marked the | |
353 | * context as halted or frozen. Report error if we time | |
354 | * out. | |
355 | */ | |
356 | wait_event_interruptible_timeout( | |
357 | sc->halt_wait, (sc->flags & SCF_HALTED), | |
358 | msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT)); | |
359 | if (!(sc->flags & SCF_HALTED)) | |
360 | return -ENOLCK; | |
361 | ||
362 | /* | |
363 | * If the send context was halted due to a Freeze, | |
364 | * wait until the device has been "unfrozen" before | |
365 | * resetting the context. | |
366 | */ | |
367 | if (sc->flags & SCF_FROZEN) { | |
368 | wait_event_interruptible_timeout( | |
369 | dd->event_queue, | |
370 | !(ACCESS_ONCE(dd->flags) & HFI1_FROZEN), | |
371 | msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT)); | |
372 | if (dd->flags & HFI1_FROZEN) | |
373 | return -ENOLCK; | |
374 | ||
375 | if (dd->flags & HFI1_FORCED_FREEZE) | |
376 | /* | |
377 | * Don't allow context reset if we are into | |
378 | * forced freeze | |
379 | */ | |
380 | return -ENODEV; | |
381 | ||
382 | sc_disable(sc); | |
383 | ret = sc_enable(sc); | |
384 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB, | |
385 | uctxt->ctxt); | |
386 | } else { | |
387 | ret = sc_restart(sc); | |
388 | } | |
389 | if (!ret) | |
390 | sc_return_credits(sc); | |
391 | break; | |
392 | } | |
393 | ||
394 | case HFI1_IOCTL_GET_VERS: | |
395 | uval = HFI1_USER_SWVERSION; | |
396 | if (put_user(uval, (int __user *)arg)) | |
397 | return -EFAULT; | |
398 | break; | |
399 | ||
400 | default: | |
401 | return -EINVAL; | |
402 | } | |
403 | ||
404 | return ret; | |
405 | } | |
406 | ||
77241056 MM |
407 | static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from) |
408 | { | |
9e10af47 IW |
409 | struct hfi1_filedata *fd = kiocb->ki_filp->private_data; |
410 | struct hfi1_user_sdma_pkt_q *pq = fd->pq; | |
411 | struct hfi1_user_sdma_comp_q *cq = fd->cq; | |
0904f327 | 412 | int done = 0, reqs = 0; |
77241056 MM |
413 | unsigned long dim = from->nr_segs; |
414 | ||
0904f327 IW |
415 | if (!cq || !pq) |
416 | return -EIO; | |
77241056 | 417 | |
0904f327 IW |
418 | if (!iter_is_iovec(from) || !dim) |
419 | return -EINVAL; | |
77241056 MM |
420 | |
421 | hfi1_cdbg(SDMA, "SDMA request from %u:%u (%lu)", | |
9e10af47 | 422 | fd->uctxt->ctxt, fd->subctxt, dim); |
77241056 | 423 | |
0904f327 IW |
424 | if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) |
425 | return -ENOSPC; | |
77241056 MM |
426 | |
427 | while (dim) { | |
0904f327 | 428 | int ret; |
77241056 MM |
429 | unsigned long count = 0; |
430 | ||
431 | ret = hfi1_user_sdma_process_request( | |
432 | kiocb->ki_filp, (struct iovec *)(from->iov + done), | |
433 | dim, &count); | |
0904f327 IW |
434 | if (ret) { |
435 | reqs = ret; | |
436 | break; | |
437 | } | |
77241056 MM |
438 | dim -= count; |
439 | done += count; | |
440 | reqs++; | |
441 | } | |
0904f327 IW |
442 | |
443 | return reqs; | |
77241056 MM |
444 | } |
445 | ||
446 | static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma) | |
447 | { | |
9e10af47 IW |
448 | struct hfi1_filedata *fd = fp->private_data; |
449 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 | 450 | struct hfi1_devdata *dd; |
60368186 | 451 | unsigned long flags; |
77241056 MM |
452 | u64 token = vma->vm_pgoff << PAGE_SHIFT, |
453 | memaddr = 0; | |
60368186 | 454 | void *memvirt = NULL; |
77241056 MM |
455 | u8 subctxt, mapio = 0, vmf = 0, type; |
456 | ssize_t memlen = 0; | |
457 | int ret = 0; | |
458 | u16 ctxt; | |
459 | ||
77241056 MM |
460 | if (!is_valid_mmap(token) || !uctxt || |
461 | !(vma->vm_flags & VM_SHARED)) { | |
462 | ret = -EINVAL; | |
463 | goto done; | |
464 | } | |
465 | dd = uctxt->dd; | |
466 | ctxt = HFI1_MMAP_TOKEN_GET(CTXT, token); | |
467 | subctxt = HFI1_MMAP_TOKEN_GET(SUBCTXT, token); | |
468 | type = HFI1_MMAP_TOKEN_GET(TYPE, token); | |
9e10af47 | 469 | if (ctxt != uctxt->ctxt || subctxt != fd->subctxt) { |
77241056 MM |
470 | ret = -EINVAL; |
471 | goto done; | |
472 | } | |
473 | ||
474 | flags = vma->vm_flags; | |
475 | ||
476 | switch (type) { | |
477 | case PIO_BUFS: | |
478 | case PIO_BUFS_SOP: | |
479 | memaddr = ((dd->physaddr + TXE_PIO_SEND) + | |
480 | /* chip pio base */ | |
d32cf44a | 481 | (uctxt->sc->hw_context * BIT(16))) + |
77241056 MM |
482 | /* 64K PIO space / ctxt */ |
483 | (type == PIO_BUFS_SOP ? | |
484 | (TXE_PIO_SIZE / 2) : 0); /* sop? */ | |
485 | /* | |
486 | * Map only the amount allocated to the context, not the | |
487 | * entire available context's PIO space. | |
488 | */ | |
437b29d1 | 489 | memlen = PAGE_ALIGN(uctxt->sc->credits * PIO_BLOCK_SIZE); |
77241056 MM |
490 | flags &= ~VM_MAYREAD; |
491 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
492 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
493 | mapio = 1; | |
494 | break; | |
495 | case PIO_CRED: | |
496 | if (flags & VM_WRITE) { | |
497 | ret = -EPERM; | |
498 | goto done; | |
499 | } | |
500 | /* | |
501 | * The credit return location for this context could be on the | |
502 | * second or third page allocated for credit returns (if number | |
503 | * of enabled contexts > 64 and 128 respectively). | |
504 | */ | |
60368186 TK |
505 | memvirt = dd->cr_base[uctxt->numa_id].va; |
506 | memaddr = virt_to_phys(memvirt) + | |
77241056 MM |
507 | (((u64)uctxt->sc->hw_free - |
508 | (u64)dd->cr_base[uctxt->numa_id].va) & PAGE_MASK); | |
509 | memlen = PAGE_SIZE; | |
510 | flags &= ~VM_MAYWRITE; | |
511 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
512 | /* | |
513 | * The driver has already allocated memory for credit | |
514 | * returns and programmed it into the chip. Has that | |
515 | * memory been flagged as non-cached? | |
516 | */ | |
517 | /* vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); */ | |
518 | mapio = 1; | |
519 | break; | |
520 | case RCV_HDRQ: | |
77241056 | 521 | memlen = uctxt->rcvhdrq_size; |
60368186 | 522 | memvirt = uctxt->rcvhdrq; |
77241056 MM |
523 | break; |
524 | case RCV_EGRBUF: { | |
525 | unsigned long addr; | |
526 | int i; | |
527 | /* | |
528 | * The RcvEgr buffer need to be handled differently | |
529 | * as multiple non-contiguous pages need to be mapped | |
530 | * into the user process. | |
531 | */ | |
532 | memlen = uctxt->egrbufs.size; | |
533 | if ((vma->vm_end - vma->vm_start) != memlen) { | |
534 | dd_dev_err(dd, "Eager buffer map size invalid (%lu != %lu)\n", | |
535 | (vma->vm_end - vma->vm_start), memlen); | |
536 | ret = -EINVAL; | |
537 | goto done; | |
538 | } | |
539 | if (vma->vm_flags & VM_WRITE) { | |
540 | ret = -EPERM; | |
541 | goto done; | |
542 | } | |
543 | vma->vm_flags &= ~VM_MAYWRITE; | |
544 | addr = vma->vm_start; | |
545 | for (i = 0 ; i < uctxt->egrbufs.numbufs; i++) { | |
60368186 TK |
546 | memlen = uctxt->egrbufs.buffers[i].len; |
547 | memvirt = uctxt->egrbufs.buffers[i].addr; | |
77241056 MM |
548 | ret = remap_pfn_range( |
549 | vma, addr, | |
60368186 TK |
550 | /* |
551 | * virt_to_pfn() does the same, but | |
552 | * it's not available on x86_64 | |
553 | * when CONFIG_MMU is enabled. | |
554 | */ | |
555 | PFN_DOWN(__pa(memvirt)), | |
556 | memlen, | |
77241056 MM |
557 | vma->vm_page_prot); |
558 | if (ret < 0) | |
559 | goto done; | |
60368186 | 560 | addr += memlen; |
77241056 MM |
561 | } |
562 | ret = 0; | |
563 | goto done; | |
564 | } | |
565 | case UREGS: | |
566 | /* | |
567 | * Map only the page that contains this context's user | |
568 | * registers. | |
569 | */ | |
570 | memaddr = (unsigned long) | |
571 | (dd->physaddr + RXE_PER_CONTEXT_USER) | |
572 | + (uctxt->ctxt * RXE_PER_CONTEXT_SIZE); | |
573 | /* | |
574 | * TidFlow table is on the same page as the rest of the | |
575 | * user registers. | |
576 | */ | |
577 | memlen = PAGE_SIZE; | |
578 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
579 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
580 | mapio = 1; | |
581 | break; | |
582 | case EVENTS: | |
583 | /* | |
584 | * Use the page where this context's flags are. User level | |
585 | * knows where it's own bitmap is within the page. | |
586 | */ | |
3c6c065a MH |
587 | memaddr = (unsigned long)(dd->events + |
588 | ((uctxt->ctxt - dd->first_user_ctxt) * | |
589 | HFI1_MAX_SHARED_CTXTS)) & PAGE_MASK; | |
77241056 MM |
590 | memlen = PAGE_SIZE; |
591 | /* | |
592 | * v3.7 removes VM_RESERVED but the effect is kept by | |
593 | * using VM_IO. | |
594 | */ | |
595 | flags |= VM_IO | VM_DONTEXPAND; | |
596 | vmf = 1; | |
597 | break; | |
598 | case STATUS: | |
599 | memaddr = kvirt_to_phys((void *)dd->status); | |
600 | memlen = PAGE_SIZE; | |
601 | flags |= VM_IO | VM_DONTEXPAND; | |
602 | break; | |
603 | case RTAIL: | |
604 | if (!HFI1_CAP_IS_USET(DMA_RTAIL)) { | |
605 | /* | |
606 | * If the memory allocation failed, the context alloc | |
607 | * also would have failed, so we would never get here | |
608 | */ | |
609 | ret = -EINVAL; | |
610 | goto done; | |
611 | } | |
612 | if (flags & VM_WRITE) { | |
613 | ret = -EPERM; | |
614 | goto done; | |
615 | } | |
77241056 | 616 | memlen = PAGE_SIZE; |
60368186 | 617 | memvirt = (void *)uctxt->rcvhdrtail_kvaddr; |
77241056 MM |
618 | flags &= ~VM_MAYWRITE; |
619 | break; | |
620 | case SUBCTXT_UREGS: | |
621 | memaddr = (u64)uctxt->subctxt_uregbase; | |
622 | memlen = PAGE_SIZE; | |
623 | flags |= VM_IO | VM_DONTEXPAND; | |
624 | vmf = 1; | |
625 | break; | |
626 | case SUBCTXT_RCV_HDRQ: | |
627 | memaddr = (u64)uctxt->subctxt_rcvhdr_base; | |
628 | memlen = uctxt->rcvhdrq_size * uctxt->subctxt_cnt; | |
629 | flags |= VM_IO | VM_DONTEXPAND; | |
630 | vmf = 1; | |
631 | break; | |
632 | case SUBCTXT_EGRBUF: | |
633 | memaddr = (u64)uctxt->subctxt_rcvegrbuf; | |
634 | memlen = uctxt->egrbufs.size * uctxt->subctxt_cnt; | |
635 | flags |= VM_IO | VM_DONTEXPAND; | |
636 | flags &= ~VM_MAYWRITE; | |
637 | vmf = 1; | |
638 | break; | |
639 | case SDMA_COMP: { | |
9e10af47 | 640 | struct hfi1_user_sdma_comp_q *cq = fd->cq; |
77241056 | 641 | |
9e10af47 | 642 | if (!cq) { |
77241056 MM |
643 | ret = -EFAULT; |
644 | goto done; | |
645 | } | |
77241056 | 646 | memaddr = (u64)cq->comps; |
437b29d1 | 647 | memlen = PAGE_ALIGN(sizeof(*cq->comps) * cq->nentries); |
77241056 MM |
648 | flags |= VM_IO | VM_DONTEXPAND; |
649 | vmf = 1; | |
650 | break; | |
651 | } | |
652 | default: | |
653 | ret = -EINVAL; | |
654 | break; | |
655 | } | |
656 | ||
657 | if ((vma->vm_end - vma->vm_start) != memlen) { | |
658 | hfi1_cdbg(PROC, "%u:%u Memory size mismatch %lu:%lu", | |
9e10af47 | 659 | uctxt->ctxt, fd->subctxt, |
77241056 MM |
660 | (vma->vm_end - vma->vm_start), memlen); |
661 | ret = -EINVAL; | |
662 | goto done; | |
663 | } | |
664 | ||
665 | vma->vm_flags = flags; | |
6c63e423 SS |
666 | hfi1_cdbg(PROC, |
667 | "%u:%u type:%u io/vf:%d/%d, addr:0x%llx, len:%lu(%lu), flags:0x%lx\n", | |
668 | ctxt, subctxt, type, mapio, vmf, memaddr, memlen, | |
77241056 | 669 | vma->vm_end - vma->vm_start, vma->vm_flags); |
77241056 | 670 | if (vmf) { |
60368186 | 671 | vma->vm_pgoff = PFN_DOWN(memaddr); |
77241056 MM |
672 | vma->vm_ops = &vm_ops; |
673 | ret = 0; | |
674 | } else if (mapio) { | |
60368186 TK |
675 | ret = io_remap_pfn_range(vma, vma->vm_start, |
676 | PFN_DOWN(memaddr), | |
677 | memlen, | |
77241056 | 678 | vma->vm_page_prot); |
60368186 TK |
679 | } else if (memvirt) { |
680 | ret = remap_pfn_range(vma, vma->vm_start, | |
681 | PFN_DOWN(__pa(memvirt)), | |
682 | memlen, | |
683 | vma->vm_page_prot); | |
77241056 | 684 | } else { |
60368186 TK |
685 | ret = remap_pfn_range(vma, vma->vm_start, |
686 | PFN_DOWN(memaddr), | |
687 | memlen, | |
77241056 MM |
688 | vma->vm_page_prot); |
689 | } | |
690 | done: | |
691 | return ret; | |
692 | } | |
693 | ||
694 | /* | |
695 | * Local (non-chip) user memory is not mapped right away but as it is | |
696 | * accessed by the user-level code. | |
697 | */ | |
11bac800 | 698 | static int vma_fault(struct vm_fault *vmf) |
77241056 MM |
699 | { |
700 | struct page *page; | |
701 | ||
702 | page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); | |
703 | if (!page) | |
704 | return VM_FAULT_SIGBUS; | |
705 | ||
706 | get_page(page); | |
707 | vmf->page = page; | |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
712 | static unsigned int hfi1_poll(struct file *fp, struct poll_table_struct *pt) | |
713 | { | |
714 | struct hfi1_ctxtdata *uctxt; | |
715 | unsigned pollflag; | |
716 | ||
9e10af47 | 717 | uctxt = ((struct hfi1_filedata *)fp->private_data)->uctxt; |
77241056 MM |
718 | if (!uctxt) |
719 | pollflag = POLLERR; | |
720 | else if (uctxt->poll_type == HFI1_POLL_TYPE_URGENT) | |
721 | pollflag = poll_urgent(fp, pt); | |
722 | else if (uctxt->poll_type == HFI1_POLL_TYPE_ANYRCV) | |
723 | pollflag = poll_next(fp, pt); | |
724 | else /* invalid */ | |
725 | pollflag = POLLERR; | |
726 | ||
727 | return pollflag; | |
728 | } | |
729 | ||
730 | static int hfi1_file_close(struct inode *inode, struct file *fp) | |
731 | { | |
732 | struct hfi1_filedata *fdata = fp->private_data; | |
733 | struct hfi1_ctxtdata *uctxt = fdata->uctxt; | |
e11ffbd5 DD |
734 | struct hfi1_devdata *dd = container_of(inode->i_cdev, |
735 | struct hfi1_devdata, | |
736 | user_cdev); | |
77241056 MM |
737 | unsigned long flags, *ev; |
738 | ||
739 | fp->private_data = NULL; | |
740 | ||
741 | if (!uctxt) | |
742 | goto done; | |
743 | ||
744 | hfi1_cdbg(PROC, "freeing ctxt %u:%u", uctxt->ctxt, fdata->subctxt); | |
77241056 MM |
745 | mutex_lock(&hfi1_mutex); |
746 | ||
747 | flush_wc(); | |
748 | /* drain user sdma queue */ | |
483119a7 | 749 | hfi1_user_sdma_free_queues(fdata); |
77241056 | 750 | |
957558c9 | 751 | /* release the cpu */ |
b094a36f | 752 | hfi1_put_proc_affinity(fdata->rec_cpu_num); |
957558c9 | 753 | |
77241056 MM |
754 | /* |
755 | * Clear any left over, unhandled events so the next process that | |
756 | * gets this context doesn't get confused. | |
757 | */ | |
758 | ev = dd->events + ((uctxt->ctxt - dd->first_user_ctxt) * | |
759 | HFI1_MAX_SHARED_CTXTS) + fdata->subctxt; | |
760 | *ev = 0; | |
761 | ||
762 | if (--uctxt->cnt) { | |
763 | uctxt->active_slaves &= ~(1 << fdata->subctxt); | |
77241056 MM |
764 | mutex_unlock(&hfi1_mutex); |
765 | goto done; | |
766 | } | |
767 | ||
768 | spin_lock_irqsave(&dd->uctxt_lock, flags); | |
769 | /* | |
770 | * Disable receive context and interrupt available, reset all | |
771 | * RcvCtxtCtrl bits to default values. | |
772 | */ | |
773 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS | | |
774 | HFI1_RCVCTRL_TIDFLOW_DIS | | |
775 | HFI1_RCVCTRL_INTRAVAIL_DIS | | |
566c157c | 776 | HFI1_RCVCTRL_TAILUPD_DIS | |
77241056 MM |
777 | HFI1_RCVCTRL_ONE_PKT_EGR_DIS | |
778 | HFI1_RCVCTRL_NO_RHQ_DROP_DIS | | |
779 | HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt->ctxt); | |
780 | /* Clear the context's J_KEY */ | |
781 | hfi1_clear_ctxt_jkey(dd, uctxt->ctxt); | |
782 | /* | |
783 | * Reset context integrity checks to default. | |
784 | * (writes to CSRs probably belong in chip.c) | |
785 | */ | |
786 | write_kctxt_csr(dd, uctxt->sc->hw_context, SEND_CTXT_CHECK_ENABLE, | |
787 | hfi1_pkt_default_send_ctxt_mask(dd, uctxt->sc->type)); | |
788 | sc_disable(uctxt->sc); | |
77241056 MM |
789 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); |
790 | ||
791 | dd->rcd[uctxt->ctxt] = NULL; | |
94158442 MH |
792 | |
793 | hfi1_user_exp_rcv_free(fdata); | |
794 | hfi1_clear_ctxt_pkey(dd, uctxt->ctxt); | |
795 | ||
77241056 MM |
796 | uctxt->rcvwait_to = 0; |
797 | uctxt->piowait_to = 0; | |
798 | uctxt->rcvnowait = 0; | |
799 | uctxt->pionowait = 0; | |
800 | uctxt->event_flags = 0; | |
801 | ||
77241056 | 802 | hfi1_stats.sps_ctxts--; |
affa48de AD |
803 | if (++dd->freectxts == dd->num_user_contexts) |
804 | aspm_enable_all(dd); | |
77241056 MM |
805 | mutex_unlock(&hfi1_mutex); |
806 | hfi1_free_ctxtdata(dd, uctxt); | |
807 | done: | |
e0cf75de | 808 | mmdrop(fdata->mm); |
e11ffbd5 | 809 | kobject_put(&dd->kobj); |
acd7c8fe TS |
810 | |
811 | if (atomic_dec_and_test(&dd->user_refcount)) | |
812 | complete(&dd->user_comp); | |
813 | ||
77241056 MM |
814 | kfree(fdata); |
815 | return 0; | |
816 | } | |
817 | ||
818 | /* | |
819 | * Convert kernel *virtual* addresses to physical addresses. | |
820 | * This is used to vmalloc'ed addresses. | |
821 | */ | |
822 | static u64 kvirt_to_phys(void *addr) | |
823 | { | |
824 | struct page *page; | |
825 | u64 paddr = 0; | |
826 | ||
827 | page = vmalloc_to_page(addr); | |
828 | if (page) | |
829 | paddr = page_to_pfn(page) << PAGE_SHIFT; | |
830 | ||
831 | return paddr; | |
832 | } | |
833 | ||
834 | static int assign_ctxt(struct file *fp, struct hfi1_user_info *uinfo) | |
835 | { | |
836 | int i_minor, ret = 0; | |
0eb62659 | 837 | unsigned int swmajor, swminor; |
77241056 MM |
838 | |
839 | swmajor = uinfo->userversion >> 16; | |
840 | if (swmajor != HFI1_USER_SWMAJOR) { | |
841 | ret = -ENODEV; | |
842 | goto done; | |
843 | } | |
844 | ||
845 | swminor = uinfo->userversion & 0xffff; | |
846 | ||
77241056 MM |
847 | mutex_lock(&hfi1_mutex); |
848 | /* First, lets check if we need to setup a shared context? */ | |
957558c9 MH |
849 | if (uinfo->subctxt_cnt) { |
850 | struct hfi1_filedata *fd = fp->private_data; | |
851 | ||
77241056 | 852 | ret = find_shared_ctxt(fp, uinfo); |
957558c9 MH |
853 | if (ret < 0) |
854 | goto done_unlock; | |
b094a36f SS |
855 | if (ret) { |
856 | fd->rec_cpu_num = | |
857 | hfi1_get_proc_affinity(fd->uctxt->numa_id); | |
858 | } | |
957558c9 | 859 | } |
77241056 MM |
860 | |
861 | /* | |
862 | * We execute the following block if we couldn't find a | |
863 | * shared context or if context sharing is not required. | |
864 | */ | |
865 | if (!ret) { | |
866 | i_minor = iminor(file_inode(fp)) - HFI1_USER_MINOR_BASE; | |
0eb62659 | 867 | ret = get_user_context(fp, uinfo, i_minor); |
77241056 | 868 | } |
957558c9 | 869 | done_unlock: |
77241056 MM |
870 | mutex_unlock(&hfi1_mutex); |
871 | done: | |
872 | return ret; | |
873 | } | |
874 | ||
875 | static int get_user_context(struct file *fp, struct hfi1_user_info *uinfo, | |
0eb62659 | 876 | int devno) |
77241056 MM |
877 | { |
878 | struct hfi1_devdata *dd = NULL; | |
0eb62659 | 879 | int devmax, npresent, nup; |
77241056 MM |
880 | |
881 | devmax = hfi1_count_units(&npresent, &nup); | |
0eb62659 DD |
882 | if (!npresent) |
883 | return -ENXIO; | |
884 | ||
885 | if (!nup) | |
886 | return -ENETDOWN; | |
887 | ||
888 | dd = hfi1_lookup(devno); | |
889 | if (!dd) | |
890 | return -ENODEV; | |
891 | else if (!dd->freectxts) | |
892 | return -EBUSY; | |
893 | ||
894 | return allocate_ctxt(fp, dd, uinfo); | |
77241056 MM |
895 | } |
896 | ||
897 | static int find_shared_ctxt(struct file *fp, | |
898 | const struct hfi1_user_info *uinfo) | |
899 | { | |
900 | int devmax, ndev, i; | |
901 | int ret = 0; | |
9e10af47 | 902 | struct hfi1_filedata *fd = fp->private_data; |
77241056 MM |
903 | |
904 | devmax = hfi1_count_units(NULL, NULL); | |
905 | ||
906 | for (ndev = 0; ndev < devmax; ndev++) { | |
907 | struct hfi1_devdata *dd = hfi1_lookup(ndev); | |
908 | ||
77241056 MM |
909 | if (!(dd && (dd->flags & HFI1_PRESENT) && dd->kregbase)) |
910 | continue; | |
911 | for (i = dd->first_user_ctxt; i < dd->num_rcv_contexts; i++) { | |
912 | struct hfi1_ctxtdata *uctxt = dd->rcd[i]; | |
913 | ||
914 | /* Skip ctxts which are not yet open */ | |
915 | if (!uctxt || !uctxt->cnt) | |
916 | continue; | |
917 | /* Skip ctxt if it doesn't match the requested one */ | |
918 | if (memcmp(uctxt->uuid, uinfo->uuid, | |
919 | sizeof(uctxt->uuid)) || | |
07839049 | 920 | uctxt->jkey != generate_jkey(current_uid()) || |
77241056 MM |
921 | uctxt->subctxt_id != uinfo->subctxt_id || |
922 | uctxt->subctxt_cnt != uinfo->subctxt_cnt) | |
923 | continue; | |
924 | ||
925 | /* Verify the sharing process matches the master */ | |
926 | if (uctxt->userversion != uinfo->userversion || | |
927 | uctxt->cnt >= uctxt->subctxt_cnt) { | |
928 | ret = -EINVAL; | |
929 | goto done; | |
930 | } | |
9e10af47 IW |
931 | fd->uctxt = uctxt; |
932 | fd->subctxt = uctxt->cnt++; | |
9e10af47 | 933 | uctxt->active_slaves |= 1 << fd->subctxt; |
77241056 MM |
934 | ret = 1; |
935 | goto done; | |
936 | } | |
937 | } | |
938 | ||
939 | done: | |
940 | return ret; | |
941 | } | |
942 | ||
943 | static int allocate_ctxt(struct file *fp, struct hfi1_devdata *dd, | |
944 | struct hfi1_user_info *uinfo) | |
945 | { | |
9e10af47 | 946 | struct hfi1_filedata *fd = fp->private_data; |
77241056 MM |
947 | struct hfi1_ctxtdata *uctxt; |
948 | unsigned ctxt; | |
957558c9 | 949 | int ret, numa; |
77241056 MM |
950 | |
951 | if (dd->flags & HFI1_FROZEN) { | |
952 | /* | |
953 | * Pick an error that is unique from all other errors | |
954 | * that are returned so the user process knows that | |
955 | * it tried to allocate while the SPC was frozen. It | |
956 | * it should be able to retry with success in a short | |
957 | * while. | |
958 | */ | |
959 | return -EIO; | |
960 | } | |
961 | ||
962 | for (ctxt = dd->first_user_ctxt; ctxt < dd->num_rcv_contexts; ctxt++) | |
963 | if (!dd->rcd[ctxt]) | |
964 | break; | |
965 | ||
966 | if (ctxt == dd->num_rcv_contexts) | |
967 | return -EBUSY; | |
968 | ||
b094a36f SS |
969 | /* |
970 | * If we don't have a NUMA node requested, preference is towards | |
971 | * device NUMA node. | |
972 | */ | |
973 | fd->rec_cpu_num = hfi1_get_proc_affinity(dd->node); | |
957558c9 MH |
974 | if (fd->rec_cpu_num != -1) |
975 | numa = cpu_to_node(fd->rec_cpu_num); | |
976 | else | |
977 | numa = numa_node_id(); | |
978 | uctxt = hfi1_create_ctxtdata(dd->pport, ctxt, numa); | |
77241056 MM |
979 | if (!uctxt) { |
980 | dd_dev_err(dd, | |
981 | "Unable to allocate ctxtdata memory, failing open\n"); | |
982 | return -ENOMEM; | |
983 | } | |
957558c9 MH |
984 | hfi1_cdbg(PROC, "[%u:%u] pid %u assigned to CPU %d (NUMA %u)", |
985 | uctxt->ctxt, fd->subctxt, current->pid, fd->rec_cpu_num, | |
986 | uctxt->numa_id); | |
987 | ||
77241056 MM |
988 | /* |
989 | * Allocate and enable a PIO send context. | |
990 | */ | |
991 | uctxt->sc = sc_alloc(dd, SC_USER, uctxt->rcvhdrqentsize, | |
cc57236f | 992 | uctxt->dd->node); |
3a6982df JP |
993 | if (!uctxt->sc) { |
994 | ret = -ENOMEM; | |
995 | goto ctxdata_free; | |
996 | } | |
6c63e423 SS |
997 | hfi1_cdbg(PROC, "allocated send context %u(%u)\n", uctxt->sc->sw_index, |
998 | uctxt->sc->hw_context); | |
77241056 MM |
999 | ret = sc_enable(uctxt->sc); |
1000 | if (ret) | |
3a6982df JP |
1001 | goto ctxdata_free; |
1002 | ||
77241056 MM |
1003 | /* |
1004 | * Setup shared context resources if the user-level has requested | |
1005 | * shared contexts and this is the 'master' process. | |
1006 | * This has to be done here so the rest of the sub-contexts find the | |
1007 | * proper master. | |
1008 | */ | |
9e10af47 | 1009 | if (uinfo->subctxt_cnt && !fd->subctxt) { |
77241056 MM |
1010 | ret = init_subctxts(uctxt, uinfo); |
1011 | /* | |
1012 | * On error, we don't need to disable and de-allocate the | |
1013 | * send context because it will be done during file close | |
1014 | */ | |
1015 | if (ret) | |
3a6982df | 1016 | goto ctxdata_free; |
77241056 MM |
1017 | } |
1018 | uctxt->userversion = uinfo->userversion; | |
bdf7752e | 1019 | uctxt->flags = hfi1_cap_mask; /* save current flag state */ |
77241056 MM |
1020 | init_waitqueue_head(&uctxt->wait); |
1021 | strlcpy(uctxt->comm, current->comm, sizeof(uctxt->comm)); | |
1022 | memcpy(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid)); | |
1023 | uctxt->jkey = generate_jkey(current_uid()); | |
1024 | INIT_LIST_HEAD(&uctxt->sdma_queues); | |
1025 | spin_lock_init(&uctxt->sdma_qlock); | |
1026 | hfi1_stats.sps_ctxts++; | |
affa48de AD |
1027 | /* |
1028 | * Disable ASPM when there are open user/PSM contexts to avoid | |
1029 | * issues with ASPM L1 exit latency | |
1030 | */ | |
1031 | if (dd->freectxts-- == dd->num_user_contexts) | |
1032 | aspm_disable_all(dd); | |
9e10af47 | 1033 | fd->uctxt = uctxt; |
77241056 MM |
1034 | |
1035 | return 0; | |
3a6982df JP |
1036 | |
1037 | ctxdata_free: | |
1038 | dd->rcd[ctxt] = NULL; | |
1039 | hfi1_free_ctxtdata(dd, uctxt); | |
1040 | return ret; | |
77241056 MM |
1041 | } |
1042 | ||
1043 | static int init_subctxts(struct hfi1_ctxtdata *uctxt, | |
1044 | const struct hfi1_user_info *uinfo) | |
1045 | { | |
77241056 MM |
1046 | unsigned num_subctxts; |
1047 | ||
1048 | num_subctxts = uinfo->subctxt_cnt; | |
acac10fd MH |
1049 | if (num_subctxts > HFI1_MAX_SHARED_CTXTS) |
1050 | return -EINVAL; | |
77241056 MM |
1051 | |
1052 | uctxt->subctxt_cnt = uinfo->subctxt_cnt; | |
1053 | uctxt->subctxt_id = uinfo->subctxt_id; | |
1054 | uctxt->active_slaves = 1; | |
1055 | uctxt->redirect_seq_cnt = 1; | |
1056 | set_bit(HFI1_CTXT_MASTER_UNINIT, &uctxt->event_flags); | |
acac10fd MH |
1057 | |
1058 | return 0; | |
77241056 MM |
1059 | } |
1060 | ||
1061 | static int setup_subctxt(struct hfi1_ctxtdata *uctxt) | |
1062 | { | |
1063 | int ret = 0; | |
1064 | unsigned num_subctxts = uctxt->subctxt_cnt; | |
1065 | ||
1066 | uctxt->subctxt_uregbase = vmalloc_user(PAGE_SIZE); | |
1067 | if (!uctxt->subctxt_uregbase) { | |
1068 | ret = -ENOMEM; | |
1069 | goto bail; | |
1070 | } | |
1071 | /* We can take the size of the RcvHdr Queue from the master */ | |
1072 | uctxt->subctxt_rcvhdr_base = vmalloc_user(uctxt->rcvhdrq_size * | |
1073 | num_subctxts); | |
1074 | if (!uctxt->subctxt_rcvhdr_base) { | |
1075 | ret = -ENOMEM; | |
1076 | goto bail_ureg; | |
1077 | } | |
1078 | ||
1079 | uctxt->subctxt_rcvegrbuf = vmalloc_user(uctxt->egrbufs.size * | |
1080 | num_subctxts); | |
1081 | if (!uctxt->subctxt_rcvegrbuf) { | |
1082 | ret = -ENOMEM; | |
1083 | goto bail_rhdr; | |
1084 | } | |
1085 | goto bail; | |
1086 | bail_rhdr: | |
1087 | vfree(uctxt->subctxt_rcvhdr_base); | |
1088 | bail_ureg: | |
1089 | vfree(uctxt->subctxt_uregbase); | |
1090 | uctxt->subctxt_uregbase = NULL; | |
1091 | bail: | |
1092 | return ret; | |
1093 | } | |
1094 | ||
1095 | static int user_init(struct file *fp) | |
1096 | { | |
77241056 | 1097 | unsigned int rcvctrl_ops = 0; |
9e10af47 IW |
1098 | struct hfi1_filedata *fd = fp->private_data; |
1099 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1100 | |
1101 | /* make sure that the context has already been setup */ | |
94158442 MH |
1102 | if (!test_bit(HFI1_CTXT_SETUP_DONE, &uctxt->event_flags)) |
1103 | return -EFAULT; | |
77241056 MM |
1104 | |
1105 | /* initialize poll variables... */ | |
1106 | uctxt->urgent = 0; | |
1107 | uctxt->urgent_poll = 0; | |
1108 | ||
1109 | /* | |
1110 | * Now enable the ctxt for receive. | |
1111 | * For chips that are set to DMA the tail register to memory | |
1112 | * when they change (and when the update bit transitions from | |
1113 | * 0 to 1. So for those chips, we turn it off and then back on. | |
1114 | * This will (very briefly) affect any other open ctxts, but the | |
1115 | * duration is very short, and therefore isn't an issue. We | |
1116 | * explicitly set the in-memory tail copy to 0 beforehand, so we | |
1117 | * don't have to wait to be sure the DMA update has happened | |
1118 | * (chip resets head/tail to 0 on transition to enable). | |
1119 | */ | |
1120 | if (uctxt->rcvhdrtail_kvaddr) | |
1121 | clear_rcvhdrtail(uctxt); | |
1122 | ||
1123 | /* Setup J_KEY before enabling the context */ | |
1124 | hfi1_set_ctxt_jkey(uctxt->dd, uctxt->ctxt, uctxt->jkey); | |
1125 | ||
1126 | rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB; | |
bdf7752e | 1127 | if (HFI1_CAP_UGET_MASK(uctxt->flags, HDRSUPP)) |
77241056 MM |
1128 | rcvctrl_ops |= HFI1_RCVCTRL_TIDFLOW_ENB; |
1129 | /* | |
1130 | * Ignore the bit in the flags for now until proper | |
1131 | * support for multiple packet per rcv array entry is | |
1132 | * added. | |
1133 | */ | |
bdf7752e | 1134 | if (!HFI1_CAP_UGET_MASK(uctxt->flags, MULTI_PKT_EGR)) |
77241056 | 1135 | rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB; |
bdf7752e | 1136 | if (HFI1_CAP_UGET_MASK(uctxt->flags, NODROP_EGR_FULL)) |
77241056 | 1137 | rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB; |
bdf7752e | 1138 | if (HFI1_CAP_UGET_MASK(uctxt->flags, NODROP_RHQ_FULL)) |
77241056 | 1139 | rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB; |
566c157c MH |
1140 | /* |
1141 | * The RcvCtxtCtrl.TailUpd bit has to be explicitly written. | |
1142 | * We can't rely on the correct value to be set from prior | |
1143 | * uses of the chip or ctxt. Therefore, add the rcvctrl op | |
1144 | * for both cases. | |
1145 | */ | |
bdf7752e | 1146 | if (HFI1_CAP_UGET_MASK(uctxt->flags, DMA_RTAIL)) |
77241056 | 1147 | rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB; |
566c157c MH |
1148 | else |
1149 | rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_DIS; | |
77241056 MM |
1150 | hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt->ctxt); |
1151 | ||
1152 | /* Notify any waiting slaves */ | |
1153 | if (uctxt->subctxt_cnt) { | |
1154 | clear_bit(HFI1_CTXT_MASTER_UNINIT, &uctxt->event_flags); | |
1155 | wake_up(&uctxt->wait); | |
1156 | } | |
77241056 | 1157 | |
94158442 | 1158 | return 0; |
77241056 MM |
1159 | } |
1160 | ||
1161 | static int get_ctxt_info(struct file *fp, void __user *ubase, __u32 len) | |
1162 | { | |
1163 | struct hfi1_ctxt_info cinfo; | |
77241056 | 1164 | struct hfi1_filedata *fd = fp->private_data; |
9e10af47 | 1165 | struct hfi1_ctxtdata *uctxt = fd->uctxt; |
77241056 MM |
1166 | int ret = 0; |
1167 | ||
ebe6b2e8 | 1168 | memset(&cinfo, 0, sizeof(cinfo)); |
bdf7752e DL |
1169 | cinfo.runtime_flags = (((uctxt->flags >> HFI1_CAP_MISC_SHIFT) & |
1170 | HFI1_CAP_MISC_MASK) << HFI1_CAP_USER_SHIFT) | | |
1171 | HFI1_CAP_UGET_MASK(uctxt->flags, MASK) | | |
1172 | HFI1_CAP_KGET_MASK(uctxt->flags, K2U); | |
622c202c DL |
1173 | /* adjust flag if this fd is not able to cache */ |
1174 | if (!fd->handler) | |
1175 | cinfo.runtime_flags |= HFI1_CAP_TID_UNMAP; /* no caching */ | |
1176 | ||
77241056 MM |
1177 | cinfo.num_active = hfi1_count_active_units(); |
1178 | cinfo.unit = uctxt->dd->unit; | |
1179 | cinfo.ctxt = uctxt->ctxt; | |
9e10af47 | 1180 | cinfo.subctxt = fd->subctxt; |
77241056 MM |
1181 | cinfo.rcvtids = roundup(uctxt->egrbufs.alloced, |
1182 | uctxt->dd->rcv_entries.group_size) + | |
1183 | uctxt->expected_count; | |
1184 | cinfo.credits = uctxt->sc->credits; | |
1185 | cinfo.numa_node = uctxt->numa_id; | |
1186 | cinfo.rec_cpu = fd->rec_cpu_num; | |
1187 | cinfo.send_ctxt = uctxt->sc->hw_context; | |
1188 | ||
1189 | cinfo.egrtids = uctxt->egrbufs.alloced; | |
1190 | cinfo.rcvhdrq_cnt = uctxt->rcvhdrq_cnt; | |
1191 | cinfo.rcvhdrq_entsize = uctxt->rcvhdrqentsize << 2; | |
9e10af47 | 1192 | cinfo.sdma_ring_size = fd->cq->nentries; |
77241056 MM |
1193 | cinfo.rcvegr_size = uctxt->egrbufs.rcvtid_size; |
1194 | ||
9e10af47 | 1195 | trace_hfi1_ctxt_info(uctxt->dd, uctxt->ctxt, fd->subctxt, cinfo); |
77241056 MM |
1196 | if (copy_to_user(ubase, &cinfo, sizeof(cinfo))) |
1197 | ret = -EFAULT; | |
bdf7752e | 1198 | |
77241056 MM |
1199 | return ret; |
1200 | } | |
1201 | ||
1202 | static int setup_ctxt(struct file *fp) | |
1203 | { | |
9e10af47 IW |
1204 | struct hfi1_filedata *fd = fp->private_data; |
1205 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1206 | struct hfi1_devdata *dd = uctxt->dd; |
1207 | int ret = 0; | |
1208 | ||
1209 | /* | |
94158442 | 1210 | * Context should be set up only once, including allocation and |
77241056 MM |
1211 | * programming of eager buffers. This is done if context sharing |
1212 | * is not requested or by the master process. | |
1213 | */ | |
9e10af47 | 1214 | if (!uctxt->subctxt_cnt || !fd->subctxt) { |
77241056 MM |
1215 | ret = hfi1_init_ctxt(uctxt->sc); |
1216 | if (ret) | |
1217 | goto done; | |
1218 | ||
1219 | /* Now allocate the RcvHdr queue and eager buffers. */ | |
1220 | ret = hfi1_create_rcvhdrq(dd, uctxt); | |
1221 | if (ret) | |
1222 | goto done; | |
1223 | ret = hfi1_setup_eagerbufs(uctxt); | |
1224 | if (ret) | |
1225 | goto done; | |
9e10af47 | 1226 | if (uctxt->subctxt_cnt && !fd->subctxt) { |
77241056 MM |
1227 | ret = setup_subctxt(uctxt); |
1228 | if (ret) | |
1229 | goto done; | |
1230 | } | |
94158442 MH |
1231 | } else { |
1232 | ret = wait_event_interruptible(uctxt->wait, !test_bit( | |
1233 | HFI1_CTXT_MASTER_UNINIT, | |
1234 | &uctxt->event_flags)); | |
1235 | if (ret) | |
1236 | goto done; | |
77241056 | 1237 | } |
94158442 | 1238 | |
77241056 | 1239 | ret = hfi1_user_sdma_alloc_queues(uctxt, fp); |
94158442 MH |
1240 | if (ret) |
1241 | goto done; | |
1242 | /* | |
1243 | * Expected receive has to be setup for all processes (including | |
1244 | * shared contexts). However, it has to be done after the master | |
1245 | * context has been fully configured as it depends on the | |
1246 | * eager/expected split of the RcvArray entries. | |
1247 | * Setting it up here ensures that the subcontexts will be waiting | |
1248 | * (due to the above wait_event_interruptible() until the master | |
1249 | * is setup. | |
1250 | */ | |
1251 | ret = hfi1_user_exp_rcv_init(fp); | |
77241056 MM |
1252 | if (ret) |
1253 | goto done; | |
1254 | ||
1255 | set_bit(HFI1_CTXT_SETUP_DONE, &uctxt->event_flags); | |
1256 | done: | |
1257 | return ret; | |
1258 | } | |
1259 | ||
1260 | static int get_base_info(struct file *fp, void __user *ubase, __u32 len) | |
1261 | { | |
1262 | struct hfi1_base_info binfo; | |
9e10af47 IW |
1263 | struct hfi1_filedata *fd = fp->private_data; |
1264 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1265 | struct hfi1_devdata *dd = uctxt->dd; |
1266 | ssize_t sz; | |
1267 | unsigned offset; | |
1268 | int ret = 0; | |
1269 | ||
1270 | trace_hfi1_uctxtdata(uctxt->dd, uctxt); | |
1271 | ||
1272 | memset(&binfo, 0, sizeof(binfo)); | |
1273 | binfo.hw_version = dd->revision; | |
1274 | binfo.sw_version = HFI1_KERN_SWVERSION; | |
1275 | binfo.bthqp = kdeth_qp; | |
1276 | binfo.jkey = uctxt->jkey; | |
1277 | /* | |
1278 | * If more than 64 contexts are enabled the allocated credit | |
1279 | * return will span two or three contiguous pages. Since we only | |
1280 | * map the page containing the context's credit return address, | |
1281 | * we need to calculate the offset in the proper page. | |
1282 | */ | |
1283 | offset = ((u64)uctxt->sc->hw_free - | |
1284 | (u64)dd->cr_base[uctxt->numa_id].va) % PAGE_SIZE; | |
1285 | binfo.sc_credits_addr = HFI1_MMAP_TOKEN(PIO_CRED, uctxt->ctxt, | |
9e10af47 | 1286 | fd->subctxt, offset); |
77241056 | 1287 | binfo.pio_bufbase = HFI1_MMAP_TOKEN(PIO_BUFS, uctxt->ctxt, |
9e10af47 | 1288 | fd->subctxt, |
77241056 MM |
1289 | uctxt->sc->base_addr); |
1290 | binfo.pio_bufbase_sop = HFI1_MMAP_TOKEN(PIO_BUFS_SOP, | |
1291 | uctxt->ctxt, | |
9e10af47 | 1292 | fd->subctxt, |
77241056 MM |
1293 | uctxt->sc->base_addr); |
1294 | binfo.rcvhdr_bufbase = HFI1_MMAP_TOKEN(RCV_HDRQ, uctxt->ctxt, | |
9e10af47 | 1295 | fd->subctxt, |
77241056 MM |
1296 | uctxt->rcvhdrq); |
1297 | binfo.rcvegr_bufbase = HFI1_MMAP_TOKEN(RCV_EGRBUF, uctxt->ctxt, | |
9e10af47 | 1298 | fd->subctxt, |
60368186 | 1299 | uctxt->egrbufs.rcvtids[0].dma); |
77241056 | 1300 | binfo.sdma_comp_bufbase = HFI1_MMAP_TOKEN(SDMA_COMP, uctxt->ctxt, |
9e10af47 | 1301 | fd->subctxt, 0); |
77241056 MM |
1302 | /* |
1303 | * user regs are at | |
1304 | * (RXE_PER_CONTEXT_USER + (ctxt * RXE_PER_CONTEXT_SIZE)) | |
1305 | */ | |
1306 | binfo.user_regbase = HFI1_MMAP_TOKEN(UREGS, uctxt->ctxt, | |
9e10af47 | 1307 | fd->subctxt, 0); |
e260e404 | 1308 | offset = offset_in_page((((uctxt->ctxt - dd->first_user_ctxt) * |
9e10af47 | 1309 | HFI1_MAX_SHARED_CTXTS) + fd->subctxt) * |
e260e404 | 1310 | sizeof(*dd->events)); |
77241056 | 1311 | binfo.events_bufbase = HFI1_MMAP_TOKEN(EVENTS, uctxt->ctxt, |
9e10af47 | 1312 | fd->subctxt, |
77241056 MM |
1313 | offset); |
1314 | binfo.status_bufbase = HFI1_MMAP_TOKEN(STATUS, uctxt->ctxt, | |
9e10af47 | 1315 | fd->subctxt, |
77241056 MM |
1316 | dd->status); |
1317 | if (HFI1_CAP_IS_USET(DMA_RTAIL)) | |
1318 | binfo.rcvhdrtail_base = HFI1_MMAP_TOKEN(RTAIL, uctxt->ctxt, | |
9e10af47 | 1319 | fd->subctxt, 0); |
77241056 MM |
1320 | if (uctxt->subctxt_cnt) { |
1321 | binfo.subctxt_uregbase = HFI1_MMAP_TOKEN(SUBCTXT_UREGS, | |
1322 | uctxt->ctxt, | |
9e10af47 | 1323 | fd->subctxt, 0); |
77241056 MM |
1324 | binfo.subctxt_rcvhdrbuf = HFI1_MMAP_TOKEN(SUBCTXT_RCV_HDRQ, |
1325 | uctxt->ctxt, | |
9e10af47 | 1326 | fd->subctxt, 0); |
77241056 MM |
1327 | binfo.subctxt_rcvegrbuf = HFI1_MMAP_TOKEN(SUBCTXT_EGRBUF, |
1328 | uctxt->ctxt, | |
9e10af47 | 1329 | fd->subctxt, 0); |
77241056 MM |
1330 | } |
1331 | sz = (len < sizeof(binfo)) ? len : sizeof(binfo); | |
1332 | if (copy_to_user(ubase, &binfo, sz)) | |
1333 | ret = -EFAULT; | |
1334 | return ret; | |
1335 | } | |
1336 | ||
1337 | static unsigned int poll_urgent(struct file *fp, | |
1338 | struct poll_table_struct *pt) | |
1339 | { | |
9e10af47 IW |
1340 | struct hfi1_filedata *fd = fp->private_data; |
1341 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1342 | struct hfi1_devdata *dd = uctxt->dd; |
1343 | unsigned pollflag; | |
1344 | ||
1345 | poll_wait(fp, &uctxt->wait, pt); | |
1346 | ||
1347 | spin_lock_irq(&dd->uctxt_lock); | |
1348 | if (uctxt->urgent != uctxt->urgent_poll) { | |
1349 | pollflag = POLLIN | POLLRDNORM; | |
1350 | uctxt->urgent_poll = uctxt->urgent; | |
1351 | } else { | |
1352 | pollflag = 0; | |
1353 | set_bit(HFI1_CTXT_WAITING_URG, &uctxt->event_flags); | |
1354 | } | |
1355 | spin_unlock_irq(&dd->uctxt_lock); | |
1356 | ||
1357 | return pollflag; | |
1358 | } | |
1359 | ||
1360 | static unsigned int poll_next(struct file *fp, | |
1361 | struct poll_table_struct *pt) | |
1362 | { | |
9e10af47 IW |
1363 | struct hfi1_filedata *fd = fp->private_data; |
1364 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1365 | struct hfi1_devdata *dd = uctxt->dd; |
1366 | unsigned pollflag; | |
1367 | ||
1368 | poll_wait(fp, &uctxt->wait, pt); | |
1369 | ||
1370 | spin_lock_irq(&dd->uctxt_lock); | |
1371 | if (hdrqempty(uctxt)) { | |
1372 | set_bit(HFI1_CTXT_WAITING_RCV, &uctxt->event_flags); | |
1373 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_ENB, uctxt->ctxt); | |
1374 | pollflag = 0; | |
e490974e | 1375 | } else { |
77241056 | 1376 | pollflag = POLLIN | POLLRDNORM; |
e490974e | 1377 | } |
77241056 MM |
1378 | spin_unlock_irq(&dd->uctxt_lock); |
1379 | ||
1380 | return pollflag; | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * Find all user contexts in use, and set the specified bit in their | |
1385 | * event mask. | |
1386 | * See also find_ctxt() for a similar use, that is specific to send buffers. | |
1387 | */ | |
1388 | int hfi1_set_uevent_bits(struct hfi1_pportdata *ppd, const int evtbit) | |
1389 | { | |
1390 | struct hfi1_ctxtdata *uctxt; | |
1391 | struct hfi1_devdata *dd = ppd->dd; | |
1392 | unsigned ctxt; | |
1393 | int ret = 0; | |
1394 | unsigned long flags; | |
1395 | ||
1396 | if (!dd->events) { | |
1397 | ret = -EINVAL; | |
1398 | goto done; | |
1399 | } | |
1400 | ||
1401 | spin_lock_irqsave(&dd->uctxt_lock, flags); | |
1402 | for (ctxt = dd->first_user_ctxt; ctxt < dd->num_rcv_contexts; | |
1403 | ctxt++) { | |
1404 | uctxt = dd->rcd[ctxt]; | |
1405 | if (uctxt) { | |
1406 | unsigned long *evs = dd->events + | |
1407 | (uctxt->ctxt - dd->first_user_ctxt) * | |
1408 | HFI1_MAX_SHARED_CTXTS; | |
1409 | int i; | |
1410 | /* | |
1411 | * subctxt_cnt is 0 if not shared, so do base | |
1412 | * separately, first, then remaining subctxt, if any | |
1413 | */ | |
1414 | set_bit(evtbit, evs); | |
1415 | for (i = 1; i < uctxt->subctxt_cnt; i++) | |
1416 | set_bit(evtbit, evs + i); | |
1417 | } | |
1418 | } | |
1419 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
1420 | done: | |
1421 | return ret; | |
1422 | } | |
1423 | ||
1424 | /** | |
1425 | * manage_rcvq - manage a context's receive queue | |
1426 | * @uctxt: the context | |
1427 | * @subctxt: the sub-context | |
1428 | * @start_stop: action to carry out | |
1429 | * | |
1430 | * start_stop == 0 disables receive on the context, for use in queue | |
1431 | * overflow conditions. start_stop==1 re-enables, to be used to | |
1432 | * re-init the software copy of the head register | |
1433 | */ | |
1434 | static int manage_rcvq(struct hfi1_ctxtdata *uctxt, unsigned subctxt, | |
1435 | int start_stop) | |
1436 | { | |
1437 | struct hfi1_devdata *dd = uctxt->dd; | |
1438 | unsigned int rcvctrl_op; | |
1439 | ||
1440 | if (subctxt) | |
1441 | goto bail; | |
1442 | /* atomically clear receive enable ctxt. */ | |
1443 | if (start_stop) { | |
1444 | /* | |
1445 | * On enable, force in-memory copy of the tail register to | |
1446 | * 0, so that protocol code doesn't have to worry about | |
1447 | * whether or not the chip has yet updated the in-memory | |
1448 | * copy or not on return from the system call. The chip | |
1449 | * always resets it's tail register back to 0 on a | |
1450 | * transition from disabled to enabled. | |
1451 | */ | |
1452 | if (uctxt->rcvhdrtail_kvaddr) | |
1453 | clear_rcvhdrtail(uctxt); | |
1454 | rcvctrl_op = HFI1_RCVCTRL_CTXT_ENB; | |
e490974e | 1455 | } else { |
77241056 | 1456 | rcvctrl_op = HFI1_RCVCTRL_CTXT_DIS; |
e490974e | 1457 | } |
77241056 MM |
1458 | hfi1_rcvctrl(dd, rcvctrl_op, uctxt->ctxt); |
1459 | /* always; new head should be equal to new tail; see above */ | |
1460 | bail: | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * clear the event notifier events for this context. | |
1466 | * User process then performs actions appropriate to bit having been | |
1467 | * set, if desired, and checks again in future. | |
1468 | */ | |
1469 | static int user_event_ack(struct hfi1_ctxtdata *uctxt, int subctxt, | |
1470 | unsigned long events) | |
1471 | { | |
1472 | int i; | |
1473 | struct hfi1_devdata *dd = uctxt->dd; | |
1474 | unsigned long *evs; | |
1475 | ||
1476 | if (!dd->events) | |
1477 | return 0; | |
1478 | ||
1479 | evs = dd->events + ((uctxt->ctxt - dd->first_user_ctxt) * | |
1480 | HFI1_MAX_SHARED_CTXTS) + subctxt; | |
1481 | ||
1482 | for (i = 0; i <= _HFI1_MAX_EVENT_BIT; i++) { | |
1483 | if (!test_bit(i, &events)) | |
1484 | continue; | |
1485 | clear_bit(i, evs); | |
1486 | } | |
1487 | return 0; | |
1488 | } | |
1489 | ||
77241056 MM |
1490 | static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned subctxt, |
1491 | u16 pkey) | |
1492 | { | |
1493 | int ret = -ENOENT, i, intable = 0; | |
1494 | struct hfi1_pportdata *ppd = uctxt->ppd; | |
1495 | struct hfi1_devdata *dd = uctxt->dd; | |
1496 | ||
1497 | if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY) { | |
1498 | ret = -EINVAL; | |
1499 | goto done; | |
1500 | } | |
1501 | ||
1502 | for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) | |
1503 | if (pkey == ppd->pkeys[i]) { | |
1504 | intable = 1; | |
1505 | break; | |
1506 | } | |
1507 | ||
1508 | if (intable) | |
1509 | ret = hfi1_set_ctxt_pkey(dd, uctxt->ctxt, pkey); | |
1510 | done: | |
1511 | return ret; | |
1512 | } | |
1513 | ||
77241056 MM |
1514 | static void user_remove(struct hfi1_devdata *dd) |
1515 | { | |
77241056 MM |
1516 | |
1517 | hfi1_cdev_cleanup(&dd->user_cdev, &dd->user_device); | |
77241056 MM |
1518 | } |
1519 | ||
1520 | static int user_add(struct hfi1_devdata *dd) | |
1521 | { | |
1522 | char name[10]; | |
1523 | int ret; | |
1524 | ||
77241056 | 1525 | snprintf(name, sizeof(name), "%s_%d", class_name(), dd->unit); |
0eb62659 | 1526 | ret = hfi1_cdev_init(dd->unit, name, &hfi1_file_ops, |
e116a64f | 1527 | &dd->user_cdev, &dd->user_device, |
e11ffbd5 | 1528 | true, &dd->kobj); |
77241056 | 1529 | if (ret) |
7312f29d | 1530 | user_remove(dd); |
77241056 | 1531 | |
77241056 MM |
1532 | return ret; |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * Create per-unit files in /dev | |
1537 | */ | |
1538 | int hfi1_device_create(struct hfi1_devdata *dd) | |
1539 | { | |
0f7b1f91 | 1540 | return user_add(dd); |
77241056 MM |
1541 | } |
1542 | ||
1543 | /* | |
1544 | * Remove per-unit files in /dev | |
1545 | * void, core kernel returns no errors for this stuff | |
1546 | */ | |
1547 | void hfi1_device_remove(struct hfi1_devdata *dd) | |
1548 | { | |
1549 | user_remove(dd); | |
77241056 | 1550 | } |