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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" |
77241056 | 61 | #include "eprom.h" |
affa48de | 62 | #include "aspm.h" |
06e0ffa6 | 63 | #include "mmu_rb.h" |
77241056 MM |
64 | |
65 | #undef pr_fmt | |
66 | #define pr_fmt(fmt) DRIVER_NAME ": " fmt | |
67 | ||
68 | #define SEND_CTXT_HALT_TIMEOUT 1000 /* msecs */ | |
69 | ||
70 | /* | |
71 | * File operation functions | |
72 | */ | |
73 | static int hfi1_file_open(struct inode *, struct file *); | |
74 | static int hfi1_file_close(struct inode *, struct file *); | |
77241056 MM |
75 | static ssize_t hfi1_write_iter(struct kiocb *, struct iov_iter *); |
76 | static unsigned int hfi1_poll(struct file *, struct poll_table_struct *); | |
77 | static int hfi1_file_mmap(struct file *, struct vm_area_struct *); | |
78 | ||
79 | static u64 kvirt_to_phys(void *); | |
80 | static int assign_ctxt(struct file *, struct hfi1_user_info *); | |
81 | static int init_subctxts(struct hfi1_ctxtdata *, const struct hfi1_user_info *); | |
82 | static int user_init(struct file *); | |
83 | static int get_ctxt_info(struct file *, void __user *, __u32); | |
84 | static int get_base_info(struct file *, void __user *, __u32); | |
85 | static int setup_ctxt(struct file *); | |
86 | static int setup_subctxt(struct hfi1_ctxtdata *); | |
0eb62659 | 87 | static int get_user_context(struct file *, struct hfi1_user_info *, int); |
77241056 MM |
88 | static int find_shared_ctxt(struct file *, const struct hfi1_user_info *); |
89 | static int allocate_ctxt(struct file *, struct hfi1_devdata *, | |
90 | struct hfi1_user_info *); | |
91 | static unsigned int poll_urgent(struct file *, struct poll_table_struct *); | |
92 | static unsigned int poll_next(struct file *, struct poll_table_struct *); | |
93 | static int user_event_ack(struct hfi1_ctxtdata *, int, unsigned long); | |
94 | static int set_ctxt_pkey(struct hfi1_ctxtdata *, unsigned, u16); | |
95 | static int manage_rcvq(struct hfi1_ctxtdata *, unsigned, int); | |
96 | static int vma_fault(struct vm_area_struct *, struct vm_fault *); | |
8d970cf9 DD |
97 | static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, |
98 | unsigned long arg); | |
77241056 MM |
99 | |
100 | static const struct file_operations hfi1_file_ops = { | |
101 | .owner = THIS_MODULE, | |
77241056 MM |
102 | .write_iter = hfi1_write_iter, |
103 | .open = hfi1_file_open, | |
104 | .release = hfi1_file_close, | |
8d970cf9 | 105 | .unlocked_ioctl = hfi1_file_ioctl, |
77241056 MM |
106 | .poll = hfi1_poll, |
107 | .mmap = hfi1_file_mmap, | |
108 | .llseek = noop_llseek, | |
109 | }; | |
110 | ||
111 | static struct vm_operations_struct vm_ops = { | |
112 | .fault = vma_fault, | |
113 | }; | |
114 | ||
115 | /* | |
116 | * Types of memories mapped into user processes' space | |
117 | */ | |
118 | enum mmap_types { | |
119 | PIO_BUFS = 1, | |
120 | PIO_BUFS_SOP, | |
121 | PIO_CRED, | |
122 | RCV_HDRQ, | |
123 | RCV_EGRBUF, | |
124 | UREGS, | |
125 | EVENTS, | |
126 | STATUS, | |
127 | RTAIL, | |
128 | SUBCTXT_UREGS, | |
129 | SUBCTXT_RCV_HDRQ, | |
130 | SUBCTXT_EGRBUF, | |
131 | SDMA_COMP | |
132 | }; | |
133 | ||
134 | /* | |
135 | * Masks and offsets defining the mmap tokens | |
136 | */ | |
137 | #define HFI1_MMAP_OFFSET_MASK 0xfffULL | |
138 | #define HFI1_MMAP_OFFSET_SHIFT 0 | |
139 | #define HFI1_MMAP_SUBCTXT_MASK 0xfULL | |
140 | #define HFI1_MMAP_SUBCTXT_SHIFT 12 | |
141 | #define HFI1_MMAP_CTXT_MASK 0xffULL | |
142 | #define HFI1_MMAP_CTXT_SHIFT 16 | |
143 | #define HFI1_MMAP_TYPE_MASK 0xfULL | |
144 | #define HFI1_MMAP_TYPE_SHIFT 24 | |
145 | #define HFI1_MMAP_MAGIC_MASK 0xffffffffULL | |
146 | #define HFI1_MMAP_MAGIC_SHIFT 32 | |
147 | ||
148 | #define HFI1_MMAP_MAGIC 0xdabbad00 | |
149 | ||
150 | #define HFI1_MMAP_TOKEN_SET(field, val) \ | |
151 | (((val) & HFI1_MMAP_##field##_MASK) << HFI1_MMAP_##field##_SHIFT) | |
152 | #define HFI1_MMAP_TOKEN_GET(field, token) \ | |
153 | (((token) >> HFI1_MMAP_##field##_SHIFT) & HFI1_MMAP_##field##_MASK) | |
154 | #define HFI1_MMAP_TOKEN(type, ctxt, subctxt, addr) \ | |
155 | (HFI1_MMAP_TOKEN_SET(MAGIC, HFI1_MMAP_MAGIC) | \ | |
156 | HFI1_MMAP_TOKEN_SET(TYPE, type) | \ | |
157 | HFI1_MMAP_TOKEN_SET(CTXT, ctxt) | \ | |
158 | HFI1_MMAP_TOKEN_SET(SUBCTXT, subctxt) | \ | |
e260e404 | 159 | HFI1_MMAP_TOKEN_SET(OFFSET, (offset_in_page(addr)))) |
77241056 | 160 | |
77241056 MM |
161 | #define dbg(fmt, ...) \ |
162 | pr_info(fmt, ##__VA_ARGS__) | |
163 | ||
77241056 MM |
164 | static inline int is_valid_mmap(u64 token) |
165 | { | |
166 | return (HFI1_MMAP_TOKEN_GET(MAGIC, token) == HFI1_MMAP_MAGIC); | |
167 | } | |
168 | ||
169 | static int hfi1_file_open(struct inode *inode, struct file *fp) | |
170 | { | |
e11ffbd5 DD |
171 | struct hfi1_devdata *dd = container_of(inode->i_cdev, |
172 | struct hfi1_devdata, | |
173 | user_cdev); | |
174 | ||
175 | /* Just take a ref now. Not all opens result in a context assign */ | |
176 | kobject_get(&dd->kobj); | |
177 | ||
77241056 MM |
178 | /* The real work is performed later in assign_ctxt() */ |
179 | fp->private_data = kzalloc(sizeof(struct hfi1_filedata), GFP_KERNEL); | |
180 | if (fp->private_data) /* no cpu affinity by default */ | |
181 | ((struct hfi1_filedata *)fp->private_data)->rec_cpu_num = -1; | |
182 | return fp->private_data ? 0 : -ENOMEM; | |
183 | } | |
184 | ||
8d970cf9 DD |
185 | static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, |
186 | unsigned long arg) | |
187 | { | |
188 | struct hfi1_filedata *fd = fp->private_data; | |
189 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
190 | struct hfi1_user_info uinfo; | |
191 | struct hfi1_tid_info tinfo; | |
192 | int ret = 0; | |
193 | unsigned long addr; | |
194 | int uval = 0; | |
195 | unsigned long ul_uval = 0; | |
196 | u16 uval16 = 0; | |
197 | ||
8a1882eb | 198 | hfi1_cdbg(IOCTL, "IOCTL recv: 0x%x", cmd); |
8d970cf9 DD |
199 | if (cmd != HFI1_IOCTL_ASSIGN_CTXT && |
200 | cmd != HFI1_IOCTL_GET_VERS && | |
201 | !uctxt) | |
202 | return -EINVAL; | |
203 | ||
204 | switch (cmd) { | |
205 | case HFI1_IOCTL_ASSIGN_CTXT: | |
ca2f30a0 IW |
206 | if (uctxt) |
207 | return -EINVAL; | |
208 | ||
8d970cf9 DD |
209 | if (copy_from_user(&uinfo, |
210 | (struct hfi1_user_info __user *)arg, | |
211 | sizeof(uinfo))) | |
212 | return -EFAULT; | |
213 | ||
214 | ret = assign_ctxt(fp, &uinfo); | |
215 | if (ret < 0) | |
216 | return ret; | |
217 | setup_ctxt(fp); | |
218 | if (ret) | |
219 | return ret; | |
220 | ret = user_init(fp); | |
221 | break; | |
222 | case HFI1_IOCTL_CTXT_INFO: | |
223 | ret = get_ctxt_info(fp, (void __user *)(unsigned long)arg, | |
224 | sizeof(struct hfi1_ctxt_info)); | |
225 | break; | |
226 | case HFI1_IOCTL_USER_INFO: | |
227 | ret = get_base_info(fp, (void __user *)(unsigned long)arg, | |
228 | sizeof(struct hfi1_base_info)); | |
229 | break; | |
230 | case HFI1_IOCTL_CREDIT_UPD: | |
231 | if (uctxt && uctxt->sc) | |
232 | sc_return_credits(uctxt->sc); | |
233 | break; | |
234 | ||
235 | case HFI1_IOCTL_TID_UPDATE: | |
236 | if (copy_from_user(&tinfo, | |
237 | (struct hfi11_tid_info __user *)arg, | |
238 | sizeof(tinfo))) | |
239 | return -EFAULT; | |
240 | ||
241 | ret = hfi1_user_exp_rcv_setup(fp, &tinfo); | |
242 | if (!ret) { | |
243 | /* | |
244 | * Copy the number of tidlist entries we used | |
245 | * and the length of the buffer we registered. | |
246 | * These fields are adjacent in the structure so | |
247 | * we can copy them at the same time. | |
248 | */ | |
249 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
250 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
251 | sizeof(tinfo.tidcnt) + | |
252 | sizeof(tinfo.length))) | |
253 | ret = -EFAULT; | |
254 | } | |
255 | break; | |
256 | ||
257 | case HFI1_IOCTL_TID_FREE: | |
258 | if (copy_from_user(&tinfo, | |
259 | (struct hfi11_tid_info __user *)arg, | |
260 | sizeof(tinfo))) | |
261 | return -EFAULT; | |
262 | ||
263 | ret = hfi1_user_exp_rcv_clear(fp, &tinfo); | |
264 | if (ret) | |
265 | break; | |
266 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
267 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
268 | sizeof(tinfo.tidcnt))) | |
269 | ret = -EFAULT; | |
270 | break; | |
271 | ||
272 | case HFI1_IOCTL_TID_INVAL_READ: | |
273 | if (copy_from_user(&tinfo, | |
274 | (struct hfi11_tid_info __user *)arg, | |
275 | sizeof(tinfo))) | |
276 | return -EFAULT; | |
277 | ||
278 | ret = hfi1_user_exp_rcv_invalid(fp, &tinfo); | |
279 | if (ret) | |
280 | break; | |
281 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
282 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
283 | sizeof(tinfo.tidcnt))) | |
284 | ret = -EFAULT; | |
285 | break; | |
286 | ||
287 | case HFI1_IOCTL_RECV_CTRL: | |
288 | ret = get_user(uval, (int __user *)arg); | |
289 | if (ret != 0) | |
290 | return -EFAULT; | |
291 | ret = manage_rcvq(uctxt, fd->subctxt, uval); | |
292 | break; | |
293 | ||
294 | case HFI1_IOCTL_POLL_TYPE: | |
295 | ret = get_user(uval, (int __user *)arg); | |
296 | if (ret != 0) | |
297 | return -EFAULT; | |
298 | uctxt->poll_type = (typeof(uctxt->poll_type))uval; | |
299 | break; | |
300 | ||
301 | case HFI1_IOCTL_ACK_EVENT: | |
302 | ret = get_user(ul_uval, (unsigned long __user *)arg); | |
303 | if (ret != 0) | |
304 | return -EFAULT; | |
305 | ret = user_event_ack(uctxt, fd->subctxt, ul_uval); | |
306 | break; | |
307 | ||
308 | case HFI1_IOCTL_SET_PKEY: | |
309 | ret = get_user(uval16, (u16 __user *)arg); | |
310 | if (ret != 0) | |
311 | return -EFAULT; | |
312 | if (HFI1_CAP_IS_USET(PKEY_CHECK)) | |
313 | ret = set_ctxt_pkey(uctxt, fd->subctxt, uval16); | |
314 | else | |
315 | return -EPERM; | |
316 | break; | |
317 | ||
318 | case HFI1_IOCTL_CTXT_RESET: { | |
319 | struct send_context *sc; | |
320 | struct hfi1_devdata *dd; | |
321 | ||
322 | if (!uctxt || !uctxt->dd || !uctxt->sc) | |
323 | return -EINVAL; | |
324 | ||
325 | /* | |
326 | * There is no protection here. User level has to | |
327 | * guarantee that no one will be writing to the send | |
328 | * context while it is being re-initialized. | |
329 | * If user level breaks that guarantee, it will break | |
330 | * it's own context and no one else's. | |
331 | */ | |
332 | dd = uctxt->dd; | |
333 | sc = uctxt->sc; | |
334 | /* | |
335 | * Wait until the interrupt handler has marked the | |
336 | * context as halted or frozen. Report error if we time | |
337 | * out. | |
338 | */ | |
339 | wait_event_interruptible_timeout( | |
340 | sc->halt_wait, (sc->flags & SCF_HALTED), | |
341 | msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT)); | |
342 | if (!(sc->flags & SCF_HALTED)) | |
343 | return -ENOLCK; | |
344 | ||
345 | /* | |
346 | * If the send context was halted due to a Freeze, | |
347 | * wait until the device has been "unfrozen" before | |
348 | * resetting the context. | |
349 | */ | |
350 | if (sc->flags & SCF_FROZEN) { | |
351 | wait_event_interruptible_timeout( | |
352 | dd->event_queue, | |
353 | !(ACCESS_ONCE(dd->flags) & HFI1_FROZEN), | |
354 | msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT)); | |
355 | if (dd->flags & HFI1_FROZEN) | |
356 | return -ENOLCK; | |
357 | ||
358 | if (dd->flags & HFI1_FORCED_FREEZE) | |
359 | /* | |
360 | * Don't allow context reset if we are into | |
361 | * forced freeze | |
362 | */ | |
363 | return -ENODEV; | |
364 | ||
365 | sc_disable(sc); | |
366 | ret = sc_enable(sc); | |
367 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB, | |
368 | uctxt->ctxt); | |
369 | } else { | |
370 | ret = sc_restart(sc); | |
371 | } | |
372 | if (!ret) | |
373 | sc_return_credits(sc); | |
374 | break; | |
375 | } | |
376 | ||
377 | case HFI1_IOCTL_GET_VERS: | |
378 | uval = HFI1_USER_SWVERSION; | |
379 | if (put_user(uval, (int __user *)arg)) | |
380 | return -EFAULT; | |
381 | break; | |
382 | ||
383 | default: | |
384 | return -EINVAL; | |
385 | } | |
386 | ||
387 | return ret; | |
388 | } | |
389 | ||
77241056 MM |
390 | static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from) |
391 | { | |
9e10af47 IW |
392 | struct hfi1_filedata *fd = kiocb->ki_filp->private_data; |
393 | struct hfi1_user_sdma_pkt_q *pq = fd->pq; | |
394 | struct hfi1_user_sdma_comp_q *cq = fd->cq; | |
77241056 MM |
395 | int ret = 0, done = 0, reqs = 0; |
396 | unsigned long dim = from->nr_segs; | |
397 | ||
9e10af47 | 398 | if (!cq || !pq) { |
77241056 MM |
399 | ret = -EIO; |
400 | goto done; | |
401 | } | |
402 | ||
403 | if (!iter_is_iovec(from) || !dim) { | |
404 | ret = -EINVAL; | |
405 | goto done; | |
406 | } | |
407 | ||
408 | hfi1_cdbg(SDMA, "SDMA request from %u:%u (%lu)", | |
9e10af47 | 409 | fd->uctxt->ctxt, fd->subctxt, dim); |
77241056 MM |
410 | |
411 | if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) { | |
412 | ret = -ENOSPC; | |
413 | goto done; | |
414 | } | |
415 | ||
416 | while (dim) { | |
417 | unsigned long count = 0; | |
418 | ||
419 | ret = hfi1_user_sdma_process_request( | |
420 | kiocb->ki_filp, (struct iovec *)(from->iov + done), | |
421 | dim, &count); | |
422 | if (ret) | |
423 | goto done; | |
424 | dim -= count; | |
425 | done += count; | |
426 | reqs++; | |
427 | } | |
428 | done: | |
429 | return ret ? ret : reqs; | |
430 | } | |
431 | ||
432 | static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma) | |
433 | { | |
9e10af47 IW |
434 | struct hfi1_filedata *fd = fp->private_data; |
435 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
436 | struct hfi1_devdata *dd; |
437 | unsigned long flags, pfn; | |
438 | u64 token = vma->vm_pgoff << PAGE_SHIFT, | |
439 | memaddr = 0; | |
440 | u8 subctxt, mapio = 0, vmf = 0, type; | |
441 | ssize_t memlen = 0; | |
442 | int ret = 0; | |
443 | u16 ctxt; | |
444 | ||
77241056 MM |
445 | if (!is_valid_mmap(token) || !uctxt || |
446 | !(vma->vm_flags & VM_SHARED)) { | |
447 | ret = -EINVAL; | |
448 | goto done; | |
449 | } | |
450 | dd = uctxt->dd; | |
451 | ctxt = HFI1_MMAP_TOKEN_GET(CTXT, token); | |
452 | subctxt = HFI1_MMAP_TOKEN_GET(SUBCTXT, token); | |
453 | type = HFI1_MMAP_TOKEN_GET(TYPE, token); | |
9e10af47 | 454 | if (ctxt != uctxt->ctxt || subctxt != fd->subctxt) { |
77241056 MM |
455 | ret = -EINVAL; |
456 | goto done; | |
457 | } | |
458 | ||
459 | flags = vma->vm_flags; | |
460 | ||
461 | switch (type) { | |
462 | case PIO_BUFS: | |
463 | case PIO_BUFS_SOP: | |
464 | memaddr = ((dd->physaddr + TXE_PIO_SEND) + | |
465 | /* chip pio base */ | |
d32cf44a | 466 | (uctxt->sc->hw_context * BIT(16))) + |
77241056 MM |
467 | /* 64K PIO space / ctxt */ |
468 | (type == PIO_BUFS_SOP ? | |
469 | (TXE_PIO_SIZE / 2) : 0); /* sop? */ | |
470 | /* | |
471 | * Map only the amount allocated to the context, not the | |
472 | * entire available context's PIO space. | |
473 | */ | |
437b29d1 | 474 | memlen = PAGE_ALIGN(uctxt->sc->credits * PIO_BLOCK_SIZE); |
77241056 MM |
475 | flags &= ~VM_MAYREAD; |
476 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
477 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
478 | mapio = 1; | |
479 | break; | |
480 | case PIO_CRED: | |
481 | if (flags & VM_WRITE) { | |
482 | ret = -EPERM; | |
483 | goto done; | |
484 | } | |
485 | /* | |
486 | * The credit return location for this context could be on the | |
487 | * second or third page allocated for credit returns (if number | |
488 | * of enabled contexts > 64 and 128 respectively). | |
489 | */ | |
490 | memaddr = dd->cr_base[uctxt->numa_id].pa + | |
491 | (((u64)uctxt->sc->hw_free - | |
492 | (u64)dd->cr_base[uctxt->numa_id].va) & PAGE_MASK); | |
493 | memlen = PAGE_SIZE; | |
494 | flags &= ~VM_MAYWRITE; | |
495 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
496 | /* | |
497 | * The driver has already allocated memory for credit | |
498 | * returns and programmed it into the chip. Has that | |
499 | * memory been flagged as non-cached? | |
500 | */ | |
501 | /* vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); */ | |
502 | mapio = 1; | |
503 | break; | |
504 | case RCV_HDRQ: | |
505 | memaddr = uctxt->rcvhdrq_phys; | |
506 | memlen = uctxt->rcvhdrq_size; | |
507 | break; | |
508 | case RCV_EGRBUF: { | |
509 | unsigned long addr; | |
510 | int i; | |
511 | /* | |
512 | * The RcvEgr buffer need to be handled differently | |
513 | * as multiple non-contiguous pages need to be mapped | |
514 | * into the user process. | |
515 | */ | |
516 | memlen = uctxt->egrbufs.size; | |
517 | if ((vma->vm_end - vma->vm_start) != memlen) { | |
518 | dd_dev_err(dd, "Eager buffer map size invalid (%lu != %lu)\n", | |
519 | (vma->vm_end - vma->vm_start), memlen); | |
520 | ret = -EINVAL; | |
521 | goto done; | |
522 | } | |
523 | if (vma->vm_flags & VM_WRITE) { | |
524 | ret = -EPERM; | |
525 | goto done; | |
526 | } | |
527 | vma->vm_flags &= ~VM_MAYWRITE; | |
528 | addr = vma->vm_start; | |
529 | for (i = 0 ; i < uctxt->egrbufs.numbufs; i++) { | |
530 | ret = remap_pfn_range( | |
531 | vma, addr, | |
532 | uctxt->egrbufs.buffers[i].phys >> PAGE_SHIFT, | |
533 | uctxt->egrbufs.buffers[i].len, | |
534 | vma->vm_page_prot); | |
535 | if (ret < 0) | |
536 | goto done; | |
537 | addr += uctxt->egrbufs.buffers[i].len; | |
538 | } | |
539 | ret = 0; | |
540 | goto done; | |
541 | } | |
542 | case UREGS: | |
543 | /* | |
544 | * Map only the page that contains this context's user | |
545 | * registers. | |
546 | */ | |
547 | memaddr = (unsigned long) | |
548 | (dd->physaddr + RXE_PER_CONTEXT_USER) | |
549 | + (uctxt->ctxt * RXE_PER_CONTEXT_SIZE); | |
550 | /* | |
551 | * TidFlow table is on the same page as the rest of the | |
552 | * user registers. | |
553 | */ | |
554 | memlen = PAGE_SIZE; | |
555 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
556 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
557 | mapio = 1; | |
558 | break; | |
559 | case EVENTS: | |
560 | /* | |
561 | * Use the page where this context's flags are. User level | |
562 | * knows where it's own bitmap is within the page. | |
563 | */ | |
3c6c065a MH |
564 | memaddr = (unsigned long)(dd->events + |
565 | ((uctxt->ctxt - dd->first_user_ctxt) * | |
566 | HFI1_MAX_SHARED_CTXTS)) & PAGE_MASK; | |
77241056 MM |
567 | memlen = PAGE_SIZE; |
568 | /* | |
569 | * v3.7 removes VM_RESERVED but the effect is kept by | |
570 | * using VM_IO. | |
571 | */ | |
572 | flags |= VM_IO | VM_DONTEXPAND; | |
573 | vmf = 1; | |
574 | break; | |
575 | case STATUS: | |
576 | memaddr = kvirt_to_phys((void *)dd->status); | |
577 | memlen = PAGE_SIZE; | |
578 | flags |= VM_IO | VM_DONTEXPAND; | |
579 | break; | |
580 | case RTAIL: | |
581 | if (!HFI1_CAP_IS_USET(DMA_RTAIL)) { | |
582 | /* | |
583 | * If the memory allocation failed, the context alloc | |
584 | * also would have failed, so we would never get here | |
585 | */ | |
586 | ret = -EINVAL; | |
587 | goto done; | |
588 | } | |
589 | if (flags & VM_WRITE) { | |
590 | ret = -EPERM; | |
591 | goto done; | |
592 | } | |
593 | memaddr = uctxt->rcvhdrqtailaddr_phys; | |
594 | memlen = PAGE_SIZE; | |
595 | flags &= ~VM_MAYWRITE; | |
596 | break; | |
597 | case SUBCTXT_UREGS: | |
598 | memaddr = (u64)uctxt->subctxt_uregbase; | |
599 | memlen = PAGE_SIZE; | |
600 | flags |= VM_IO | VM_DONTEXPAND; | |
601 | vmf = 1; | |
602 | break; | |
603 | case SUBCTXT_RCV_HDRQ: | |
604 | memaddr = (u64)uctxt->subctxt_rcvhdr_base; | |
605 | memlen = uctxt->rcvhdrq_size * uctxt->subctxt_cnt; | |
606 | flags |= VM_IO | VM_DONTEXPAND; | |
607 | vmf = 1; | |
608 | break; | |
609 | case SUBCTXT_EGRBUF: | |
610 | memaddr = (u64)uctxt->subctxt_rcvegrbuf; | |
611 | memlen = uctxt->egrbufs.size * uctxt->subctxt_cnt; | |
612 | flags |= VM_IO | VM_DONTEXPAND; | |
613 | flags &= ~VM_MAYWRITE; | |
614 | vmf = 1; | |
615 | break; | |
616 | case SDMA_COMP: { | |
9e10af47 | 617 | struct hfi1_user_sdma_comp_q *cq = fd->cq; |
77241056 | 618 | |
9e10af47 | 619 | if (!cq) { |
77241056 MM |
620 | ret = -EFAULT; |
621 | goto done; | |
622 | } | |
77241056 | 623 | memaddr = (u64)cq->comps; |
437b29d1 | 624 | memlen = PAGE_ALIGN(sizeof(*cq->comps) * cq->nentries); |
77241056 MM |
625 | flags |= VM_IO | VM_DONTEXPAND; |
626 | vmf = 1; | |
627 | break; | |
628 | } | |
629 | default: | |
630 | ret = -EINVAL; | |
631 | break; | |
632 | } | |
633 | ||
634 | if ((vma->vm_end - vma->vm_start) != memlen) { | |
635 | hfi1_cdbg(PROC, "%u:%u Memory size mismatch %lu:%lu", | |
9e10af47 | 636 | uctxt->ctxt, fd->subctxt, |
77241056 MM |
637 | (vma->vm_end - vma->vm_start), memlen); |
638 | ret = -EINVAL; | |
639 | goto done; | |
640 | } | |
641 | ||
642 | vma->vm_flags = flags; | |
6c63e423 SS |
643 | hfi1_cdbg(PROC, |
644 | "%u:%u type:%u io/vf:%d/%d, addr:0x%llx, len:%lu(%lu), flags:0x%lx\n", | |
645 | ctxt, subctxt, type, mapio, vmf, memaddr, memlen, | |
77241056 MM |
646 | vma->vm_end - vma->vm_start, vma->vm_flags); |
647 | pfn = (unsigned long)(memaddr >> PAGE_SHIFT); | |
648 | if (vmf) { | |
649 | vma->vm_pgoff = pfn; | |
650 | vma->vm_ops = &vm_ops; | |
651 | ret = 0; | |
652 | } else if (mapio) { | |
653 | ret = io_remap_pfn_range(vma, vma->vm_start, pfn, memlen, | |
654 | vma->vm_page_prot); | |
655 | } else { | |
656 | ret = remap_pfn_range(vma, vma->vm_start, pfn, memlen, | |
657 | vma->vm_page_prot); | |
658 | } | |
659 | done: | |
660 | return ret; | |
661 | } | |
662 | ||
663 | /* | |
664 | * Local (non-chip) user memory is not mapped right away but as it is | |
665 | * accessed by the user-level code. | |
666 | */ | |
667 | static int vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
668 | { | |
669 | struct page *page; | |
670 | ||
671 | page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); | |
672 | if (!page) | |
673 | return VM_FAULT_SIGBUS; | |
674 | ||
675 | get_page(page); | |
676 | vmf->page = page; | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | static unsigned int hfi1_poll(struct file *fp, struct poll_table_struct *pt) | |
682 | { | |
683 | struct hfi1_ctxtdata *uctxt; | |
684 | unsigned pollflag; | |
685 | ||
9e10af47 | 686 | uctxt = ((struct hfi1_filedata *)fp->private_data)->uctxt; |
77241056 MM |
687 | if (!uctxt) |
688 | pollflag = POLLERR; | |
689 | else if (uctxt->poll_type == HFI1_POLL_TYPE_URGENT) | |
690 | pollflag = poll_urgent(fp, pt); | |
691 | else if (uctxt->poll_type == HFI1_POLL_TYPE_ANYRCV) | |
692 | pollflag = poll_next(fp, pt); | |
693 | else /* invalid */ | |
694 | pollflag = POLLERR; | |
695 | ||
696 | return pollflag; | |
697 | } | |
698 | ||
699 | static int hfi1_file_close(struct inode *inode, struct file *fp) | |
700 | { | |
701 | struct hfi1_filedata *fdata = fp->private_data; | |
702 | struct hfi1_ctxtdata *uctxt = fdata->uctxt; | |
e11ffbd5 DD |
703 | struct hfi1_devdata *dd = container_of(inode->i_cdev, |
704 | struct hfi1_devdata, | |
705 | user_cdev); | |
77241056 MM |
706 | unsigned long flags, *ev; |
707 | ||
708 | fp->private_data = NULL; | |
709 | ||
710 | if (!uctxt) | |
711 | goto done; | |
712 | ||
713 | hfi1_cdbg(PROC, "freeing ctxt %u:%u", uctxt->ctxt, fdata->subctxt); | |
77241056 MM |
714 | mutex_lock(&hfi1_mutex); |
715 | ||
716 | flush_wc(); | |
717 | /* drain user sdma queue */ | |
483119a7 | 718 | hfi1_user_sdma_free_queues(fdata); |
77241056 | 719 | |
957558c9 MH |
720 | /* release the cpu */ |
721 | hfi1_put_proc_affinity(dd, fdata->rec_cpu_num); | |
722 | ||
77241056 MM |
723 | /* |
724 | * Clear any left over, unhandled events so the next process that | |
725 | * gets this context doesn't get confused. | |
726 | */ | |
727 | ev = dd->events + ((uctxt->ctxt - dd->first_user_ctxt) * | |
728 | HFI1_MAX_SHARED_CTXTS) + fdata->subctxt; | |
729 | *ev = 0; | |
730 | ||
731 | if (--uctxt->cnt) { | |
732 | uctxt->active_slaves &= ~(1 << fdata->subctxt); | |
733 | uctxt->subpid[fdata->subctxt] = 0; | |
734 | mutex_unlock(&hfi1_mutex); | |
735 | goto done; | |
736 | } | |
737 | ||
738 | spin_lock_irqsave(&dd->uctxt_lock, flags); | |
739 | /* | |
740 | * Disable receive context and interrupt available, reset all | |
741 | * RcvCtxtCtrl bits to default values. | |
742 | */ | |
743 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS | | |
744 | HFI1_RCVCTRL_TIDFLOW_DIS | | |
745 | HFI1_RCVCTRL_INTRAVAIL_DIS | | |
566c157c | 746 | HFI1_RCVCTRL_TAILUPD_DIS | |
77241056 MM |
747 | HFI1_RCVCTRL_ONE_PKT_EGR_DIS | |
748 | HFI1_RCVCTRL_NO_RHQ_DROP_DIS | | |
749 | HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt->ctxt); | |
750 | /* Clear the context's J_KEY */ | |
751 | hfi1_clear_ctxt_jkey(dd, uctxt->ctxt); | |
752 | /* | |
753 | * Reset context integrity checks to default. | |
754 | * (writes to CSRs probably belong in chip.c) | |
755 | */ | |
756 | write_kctxt_csr(dd, uctxt->sc->hw_context, SEND_CTXT_CHECK_ENABLE, | |
757 | hfi1_pkt_default_send_ctxt_mask(dd, uctxt->sc->type)); | |
758 | sc_disable(uctxt->sc); | |
759 | uctxt->pid = 0; | |
760 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
761 | ||
762 | dd->rcd[uctxt->ctxt] = NULL; | |
94158442 MH |
763 | |
764 | hfi1_user_exp_rcv_free(fdata); | |
765 | hfi1_clear_ctxt_pkey(dd, uctxt->ctxt); | |
766 | ||
77241056 MM |
767 | uctxt->rcvwait_to = 0; |
768 | uctxt->piowait_to = 0; | |
769 | uctxt->rcvnowait = 0; | |
770 | uctxt->pionowait = 0; | |
771 | uctxt->event_flags = 0; | |
772 | ||
77241056 | 773 | hfi1_stats.sps_ctxts--; |
affa48de AD |
774 | if (++dd->freectxts == dd->num_user_contexts) |
775 | aspm_enable_all(dd); | |
77241056 MM |
776 | mutex_unlock(&hfi1_mutex); |
777 | hfi1_free_ctxtdata(dd, uctxt); | |
778 | done: | |
e11ffbd5 | 779 | kobject_put(&dd->kobj); |
77241056 MM |
780 | kfree(fdata); |
781 | return 0; | |
782 | } | |
783 | ||
784 | /* | |
785 | * Convert kernel *virtual* addresses to physical addresses. | |
786 | * This is used to vmalloc'ed addresses. | |
787 | */ | |
788 | static u64 kvirt_to_phys(void *addr) | |
789 | { | |
790 | struct page *page; | |
791 | u64 paddr = 0; | |
792 | ||
793 | page = vmalloc_to_page(addr); | |
794 | if (page) | |
795 | paddr = page_to_pfn(page) << PAGE_SHIFT; | |
796 | ||
797 | return paddr; | |
798 | } | |
799 | ||
800 | static int assign_ctxt(struct file *fp, struct hfi1_user_info *uinfo) | |
801 | { | |
802 | int i_minor, ret = 0; | |
0eb62659 | 803 | unsigned int swmajor, swminor; |
77241056 MM |
804 | |
805 | swmajor = uinfo->userversion >> 16; | |
806 | if (swmajor != HFI1_USER_SWMAJOR) { | |
807 | ret = -ENODEV; | |
808 | goto done; | |
809 | } | |
810 | ||
811 | swminor = uinfo->userversion & 0xffff; | |
812 | ||
77241056 MM |
813 | mutex_lock(&hfi1_mutex); |
814 | /* First, lets check if we need to setup a shared context? */ | |
957558c9 MH |
815 | if (uinfo->subctxt_cnt) { |
816 | struct hfi1_filedata *fd = fp->private_data; | |
817 | ||
77241056 | 818 | ret = find_shared_ctxt(fp, uinfo); |
957558c9 MH |
819 | if (ret < 0) |
820 | goto done_unlock; | |
821 | if (ret) | |
822 | fd->rec_cpu_num = hfi1_get_proc_affinity( | |
823 | fd->uctxt->dd, fd->uctxt->numa_id); | |
824 | } | |
77241056 MM |
825 | |
826 | /* | |
827 | * We execute the following block if we couldn't find a | |
828 | * shared context or if context sharing is not required. | |
829 | */ | |
830 | if (!ret) { | |
831 | i_minor = iminor(file_inode(fp)) - HFI1_USER_MINOR_BASE; | |
0eb62659 | 832 | ret = get_user_context(fp, uinfo, i_minor); |
77241056 | 833 | } |
957558c9 | 834 | done_unlock: |
77241056 MM |
835 | mutex_unlock(&hfi1_mutex); |
836 | done: | |
837 | return ret; | |
838 | } | |
839 | ||
840 | static int get_user_context(struct file *fp, struct hfi1_user_info *uinfo, | |
0eb62659 | 841 | int devno) |
77241056 MM |
842 | { |
843 | struct hfi1_devdata *dd = NULL; | |
0eb62659 | 844 | int devmax, npresent, nup; |
77241056 MM |
845 | |
846 | devmax = hfi1_count_units(&npresent, &nup); | |
0eb62659 DD |
847 | if (!npresent) |
848 | return -ENXIO; | |
849 | ||
850 | if (!nup) | |
851 | return -ENETDOWN; | |
852 | ||
853 | dd = hfi1_lookup(devno); | |
854 | if (!dd) | |
855 | return -ENODEV; | |
856 | else if (!dd->freectxts) | |
857 | return -EBUSY; | |
858 | ||
859 | return allocate_ctxt(fp, dd, uinfo); | |
77241056 MM |
860 | } |
861 | ||
862 | static int find_shared_ctxt(struct file *fp, | |
863 | const struct hfi1_user_info *uinfo) | |
864 | { | |
865 | int devmax, ndev, i; | |
866 | int ret = 0; | |
9e10af47 | 867 | struct hfi1_filedata *fd = fp->private_data; |
77241056 MM |
868 | |
869 | devmax = hfi1_count_units(NULL, NULL); | |
870 | ||
871 | for (ndev = 0; ndev < devmax; ndev++) { | |
872 | struct hfi1_devdata *dd = hfi1_lookup(ndev); | |
873 | ||
77241056 MM |
874 | if (!(dd && (dd->flags & HFI1_PRESENT) && dd->kregbase)) |
875 | continue; | |
876 | for (i = dd->first_user_ctxt; i < dd->num_rcv_contexts; i++) { | |
877 | struct hfi1_ctxtdata *uctxt = dd->rcd[i]; | |
878 | ||
879 | /* Skip ctxts which are not yet open */ | |
880 | if (!uctxt || !uctxt->cnt) | |
881 | continue; | |
882 | /* Skip ctxt if it doesn't match the requested one */ | |
883 | if (memcmp(uctxt->uuid, uinfo->uuid, | |
884 | sizeof(uctxt->uuid)) || | |
07839049 | 885 | uctxt->jkey != generate_jkey(current_uid()) || |
77241056 MM |
886 | uctxt->subctxt_id != uinfo->subctxt_id || |
887 | uctxt->subctxt_cnt != uinfo->subctxt_cnt) | |
888 | continue; | |
889 | ||
890 | /* Verify the sharing process matches the master */ | |
891 | if (uctxt->userversion != uinfo->userversion || | |
892 | uctxt->cnt >= uctxt->subctxt_cnt) { | |
893 | ret = -EINVAL; | |
894 | goto done; | |
895 | } | |
9e10af47 IW |
896 | fd->uctxt = uctxt; |
897 | fd->subctxt = uctxt->cnt++; | |
898 | uctxt->subpid[fd->subctxt] = current->pid; | |
899 | uctxt->active_slaves |= 1 << fd->subctxt; | |
77241056 MM |
900 | ret = 1; |
901 | goto done; | |
902 | } | |
903 | } | |
904 | ||
905 | done: | |
906 | return ret; | |
907 | } | |
908 | ||
909 | static int allocate_ctxt(struct file *fp, struct hfi1_devdata *dd, | |
910 | struct hfi1_user_info *uinfo) | |
911 | { | |
9e10af47 | 912 | struct hfi1_filedata *fd = fp->private_data; |
77241056 MM |
913 | struct hfi1_ctxtdata *uctxt; |
914 | unsigned ctxt; | |
957558c9 | 915 | int ret, numa; |
77241056 MM |
916 | |
917 | if (dd->flags & HFI1_FROZEN) { | |
918 | /* | |
919 | * Pick an error that is unique from all other errors | |
920 | * that are returned so the user process knows that | |
921 | * it tried to allocate while the SPC was frozen. It | |
922 | * it should be able to retry with success in a short | |
923 | * while. | |
924 | */ | |
925 | return -EIO; | |
926 | } | |
927 | ||
928 | for (ctxt = dd->first_user_ctxt; ctxt < dd->num_rcv_contexts; ctxt++) | |
929 | if (!dd->rcd[ctxt]) | |
930 | break; | |
931 | ||
932 | if (ctxt == dd->num_rcv_contexts) | |
933 | return -EBUSY; | |
934 | ||
957558c9 MH |
935 | fd->rec_cpu_num = hfi1_get_proc_affinity(dd, -1); |
936 | if (fd->rec_cpu_num != -1) | |
937 | numa = cpu_to_node(fd->rec_cpu_num); | |
938 | else | |
939 | numa = numa_node_id(); | |
940 | uctxt = hfi1_create_ctxtdata(dd->pport, ctxt, numa); | |
77241056 MM |
941 | if (!uctxt) { |
942 | dd_dev_err(dd, | |
943 | "Unable to allocate ctxtdata memory, failing open\n"); | |
944 | return -ENOMEM; | |
945 | } | |
957558c9 MH |
946 | hfi1_cdbg(PROC, "[%u:%u] pid %u assigned to CPU %d (NUMA %u)", |
947 | uctxt->ctxt, fd->subctxt, current->pid, fd->rec_cpu_num, | |
948 | uctxt->numa_id); | |
949 | ||
77241056 MM |
950 | /* |
951 | * Allocate and enable a PIO send context. | |
952 | */ | |
953 | uctxt->sc = sc_alloc(dd, SC_USER, uctxt->rcvhdrqentsize, | |
cc57236f | 954 | uctxt->dd->node); |
77241056 MM |
955 | if (!uctxt->sc) |
956 | return -ENOMEM; | |
957 | ||
6c63e423 SS |
958 | hfi1_cdbg(PROC, "allocated send context %u(%u)\n", uctxt->sc->sw_index, |
959 | uctxt->sc->hw_context); | |
77241056 MM |
960 | ret = sc_enable(uctxt->sc); |
961 | if (ret) | |
962 | return ret; | |
963 | /* | |
964 | * Setup shared context resources if the user-level has requested | |
965 | * shared contexts and this is the 'master' process. | |
966 | * This has to be done here so the rest of the sub-contexts find the | |
967 | * proper master. | |
968 | */ | |
9e10af47 | 969 | if (uinfo->subctxt_cnt && !fd->subctxt) { |
77241056 MM |
970 | ret = init_subctxts(uctxt, uinfo); |
971 | /* | |
972 | * On error, we don't need to disable and de-allocate the | |
973 | * send context because it will be done during file close | |
974 | */ | |
975 | if (ret) | |
976 | return ret; | |
977 | } | |
978 | uctxt->userversion = uinfo->userversion; | |
979 | uctxt->pid = current->pid; | |
980 | uctxt->flags = HFI1_CAP_UGET(MASK); | |
981 | init_waitqueue_head(&uctxt->wait); | |
982 | strlcpy(uctxt->comm, current->comm, sizeof(uctxt->comm)); | |
983 | memcpy(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid)); | |
984 | uctxt->jkey = generate_jkey(current_uid()); | |
985 | INIT_LIST_HEAD(&uctxt->sdma_queues); | |
986 | spin_lock_init(&uctxt->sdma_qlock); | |
987 | hfi1_stats.sps_ctxts++; | |
affa48de AD |
988 | /* |
989 | * Disable ASPM when there are open user/PSM contexts to avoid | |
990 | * issues with ASPM L1 exit latency | |
991 | */ | |
992 | if (dd->freectxts-- == dd->num_user_contexts) | |
993 | aspm_disable_all(dd); | |
9e10af47 | 994 | fd->uctxt = uctxt; |
77241056 MM |
995 | |
996 | return 0; | |
997 | } | |
998 | ||
999 | static int init_subctxts(struct hfi1_ctxtdata *uctxt, | |
1000 | const struct hfi1_user_info *uinfo) | |
1001 | { | |
77241056 MM |
1002 | unsigned num_subctxts; |
1003 | ||
1004 | num_subctxts = uinfo->subctxt_cnt; | |
acac10fd MH |
1005 | if (num_subctxts > HFI1_MAX_SHARED_CTXTS) |
1006 | return -EINVAL; | |
77241056 MM |
1007 | |
1008 | uctxt->subctxt_cnt = uinfo->subctxt_cnt; | |
1009 | uctxt->subctxt_id = uinfo->subctxt_id; | |
1010 | uctxt->active_slaves = 1; | |
1011 | uctxt->redirect_seq_cnt = 1; | |
1012 | set_bit(HFI1_CTXT_MASTER_UNINIT, &uctxt->event_flags); | |
acac10fd MH |
1013 | |
1014 | return 0; | |
77241056 MM |
1015 | } |
1016 | ||
1017 | static int setup_subctxt(struct hfi1_ctxtdata *uctxt) | |
1018 | { | |
1019 | int ret = 0; | |
1020 | unsigned num_subctxts = uctxt->subctxt_cnt; | |
1021 | ||
1022 | uctxt->subctxt_uregbase = vmalloc_user(PAGE_SIZE); | |
1023 | if (!uctxt->subctxt_uregbase) { | |
1024 | ret = -ENOMEM; | |
1025 | goto bail; | |
1026 | } | |
1027 | /* We can take the size of the RcvHdr Queue from the master */ | |
1028 | uctxt->subctxt_rcvhdr_base = vmalloc_user(uctxt->rcvhdrq_size * | |
1029 | num_subctxts); | |
1030 | if (!uctxt->subctxt_rcvhdr_base) { | |
1031 | ret = -ENOMEM; | |
1032 | goto bail_ureg; | |
1033 | } | |
1034 | ||
1035 | uctxt->subctxt_rcvegrbuf = vmalloc_user(uctxt->egrbufs.size * | |
1036 | num_subctxts); | |
1037 | if (!uctxt->subctxt_rcvegrbuf) { | |
1038 | ret = -ENOMEM; | |
1039 | goto bail_rhdr; | |
1040 | } | |
1041 | goto bail; | |
1042 | bail_rhdr: | |
1043 | vfree(uctxt->subctxt_rcvhdr_base); | |
1044 | bail_ureg: | |
1045 | vfree(uctxt->subctxt_uregbase); | |
1046 | uctxt->subctxt_uregbase = NULL; | |
1047 | bail: | |
1048 | return ret; | |
1049 | } | |
1050 | ||
1051 | static int user_init(struct file *fp) | |
1052 | { | |
77241056 | 1053 | unsigned int rcvctrl_ops = 0; |
9e10af47 IW |
1054 | struct hfi1_filedata *fd = fp->private_data; |
1055 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1056 | |
1057 | /* make sure that the context has already been setup */ | |
94158442 MH |
1058 | if (!test_bit(HFI1_CTXT_SETUP_DONE, &uctxt->event_flags)) |
1059 | return -EFAULT; | |
77241056 MM |
1060 | |
1061 | /* initialize poll variables... */ | |
1062 | uctxt->urgent = 0; | |
1063 | uctxt->urgent_poll = 0; | |
1064 | ||
1065 | /* | |
1066 | * Now enable the ctxt for receive. | |
1067 | * For chips that are set to DMA the tail register to memory | |
1068 | * when they change (and when the update bit transitions from | |
1069 | * 0 to 1. So for those chips, we turn it off and then back on. | |
1070 | * This will (very briefly) affect any other open ctxts, but the | |
1071 | * duration is very short, and therefore isn't an issue. We | |
1072 | * explicitly set the in-memory tail copy to 0 beforehand, so we | |
1073 | * don't have to wait to be sure the DMA update has happened | |
1074 | * (chip resets head/tail to 0 on transition to enable). | |
1075 | */ | |
1076 | if (uctxt->rcvhdrtail_kvaddr) | |
1077 | clear_rcvhdrtail(uctxt); | |
1078 | ||
1079 | /* Setup J_KEY before enabling the context */ | |
1080 | hfi1_set_ctxt_jkey(uctxt->dd, uctxt->ctxt, uctxt->jkey); | |
1081 | ||
1082 | rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB; | |
1083 | if (HFI1_CAP_KGET_MASK(uctxt->flags, HDRSUPP)) | |
1084 | rcvctrl_ops |= HFI1_RCVCTRL_TIDFLOW_ENB; | |
1085 | /* | |
1086 | * Ignore the bit in the flags for now until proper | |
1087 | * support for multiple packet per rcv array entry is | |
1088 | * added. | |
1089 | */ | |
1090 | if (!HFI1_CAP_KGET_MASK(uctxt->flags, MULTI_PKT_EGR)) | |
1091 | rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB; | |
1092 | if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_EGR_FULL)) | |
1093 | rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB; | |
1094 | if (HFI1_CAP_KGET_MASK(uctxt->flags, NODROP_RHQ_FULL)) | |
1095 | rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB; | |
566c157c MH |
1096 | /* |
1097 | * The RcvCtxtCtrl.TailUpd bit has to be explicitly written. | |
1098 | * We can't rely on the correct value to be set from prior | |
1099 | * uses of the chip or ctxt. Therefore, add the rcvctrl op | |
1100 | * for both cases. | |
1101 | */ | |
77241056 MM |
1102 | if (HFI1_CAP_KGET_MASK(uctxt->flags, DMA_RTAIL)) |
1103 | rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB; | |
566c157c MH |
1104 | else |
1105 | rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_DIS; | |
77241056 MM |
1106 | hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt->ctxt); |
1107 | ||
1108 | /* Notify any waiting slaves */ | |
1109 | if (uctxt->subctxt_cnt) { | |
1110 | clear_bit(HFI1_CTXT_MASTER_UNINIT, &uctxt->event_flags); | |
1111 | wake_up(&uctxt->wait); | |
1112 | } | |
77241056 | 1113 | |
94158442 | 1114 | return 0; |
77241056 MM |
1115 | } |
1116 | ||
1117 | static int get_ctxt_info(struct file *fp, void __user *ubase, __u32 len) | |
1118 | { | |
1119 | struct hfi1_ctxt_info cinfo; | |
77241056 | 1120 | struct hfi1_filedata *fd = fp->private_data; |
9e10af47 | 1121 | struct hfi1_ctxtdata *uctxt = fd->uctxt; |
77241056 MM |
1122 | int ret = 0; |
1123 | ||
ebe6b2e8 | 1124 | memset(&cinfo, 0, sizeof(cinfo)); |
77241056 MM |
1125 | ret = hfi1_get_base_kinfo(uctxt, &cinfo); |
1126 | if (ret < 0) | |
1127 | goto done; | |
1128 | cinfo.num_active = hfi1_count_active_units(); | |
1129 | cinfo.unit = uctxt->dd->unit; | |
1130 | cinfo.ctxt = uctxt->ctxt; | |
9e10af47 | 1131 | cinfo.subctxt = fd->subctxt; |
77241056 MM |
1132 | cinfo.rcvtids = roundup(uctxt->egrbufs.alloced, |
1133 | uctxt->dd->rcv_entries.group_size) + | |
1134 | uctxt->expected_count; | |
1135 | cinfo.credits = uctxt->sc->credits; | |
1136 | cinfo.numa_node = uctxt->numa_id; | |
1137 | cinfo.rec_cpu = fd->rec_cpu_num; | |
1138 | cinfo.send_ctxt = uctxt->sc->hw_context; | |
1139 | ||
1140 | cinfo.egrtids = uctxt->egrbufs.alloced; | |
1141 | cinfo.rcvhdrq_cnt = uctxt->rcvhdrq_cnt; | |
1142 | cinfo.rcvhdrq_entsize = uctxt->rcvhdrqentsize << 2; | |
9e10af47 | 1143 | cinfo.sdma_ring_size = fd->cq->nentries; |
77241056 MM |
1144 | cinfo.rcvegr_size = uctxt->egrbufs.rcvtid_size; |
1145 | ||
9e10af47 | 1146 | trace_hfi1_ctxt_info(uctxt->dd, uctxt->ctxt, fd->subctxt, cinfo); |
77241056 MM |
1147 | if (copy_to_user(ubase, &cinfo, sizeof(cinfo))) |
1148 | ret = -EFAULT; | |
1149 | done: | |
1150 | return ret; | |
1151 | } | |
1152 | ||
1153 | static int setup_ctxt(struct file *fp) | |
1154 | { | |
9e10af47 IW |
1155 | struct hfi1_filedata *fd = fp->private_data; |
1156 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1157 | struct hfi1_devdata *dd = uctxt->dd; |
1158 | int ret = 0; | |
1159 | ||
1160 | /* | |
94158442 | 1161 | * Context should be set up only once, including allocation and |
77241056 MM |
1162 | * programming of eager buffers. This is done if context sharing |
1163 | * is not requested or by the master process. | |
1164 | */ | |
9e10af47 | 1165 | if (!uctxt->subctxt_cnt || !fd->subctxt) { |
77241056 MM |
1166 | ret = hfi1_init_ctxt(uctxt->sc); |
1167 | if (ret) | |
1168 | goto done; | |
1169 | ||
1170 | /* Now allocate the RcvHdr queue and eager buffers. */ | |
1171 | ret = hfi1_create_rcvhdrq(dd, uctxt); | |
1172 | if (ret) | |
1173 | goto done; | |
1174 | ret = hfi1_setup_eagerbufs(uctxt); | |
1175 | if (ret) | |
1176 | goto done; | |
9e10af47 | 1177 | if (uctxt->subctxt_cnt && !fd->subctxt) { |
77241056 MM |
1178 | ret = setup_subctxt(uctxt); |
1179 | if (ret) | |
1180 | goto done; | |
1181 | } | |
94158442 MH |
1182 | } else { |
1183 | ret = wait_event_interruptible(uctxt->wait, !test_bit( | |
1184 | HFI1_CTXT_MASTER_UNINIT, | |
1185 | &uctxt->event_flags)); | |
1186 | if (ret) | |
1187 | goto done; | |
77241056 | 1188 | } |
94158442 | 1189 | |
77241056 | 1190 | ret = hfi1_user_sdma_alloc_queues(uctxt, fp); |
94158442 MH |
1191 | if (ret) |
1192 | goto done; | |
1193 | /* | |
1194 | * Expected receive has to be setup for all processes (including | |
1195 | * shared contexts). However, it has to be done after the master | |
1196 | * context has been fully configured as it depends on the | |
1197 | * eager/expected split of the RcvArray entries. | |
1198 | * Setting it up here ensures that the subcontexts will be waiting | |
1199 | * (due to the above wait_event_interruptible() until the master | |
1200 | * is setup. | |
1201 | */ | |
1202 | ret = hfi1_user_exp_rcv_init(fp); | |
77241056 MM |
1203 | if (ret) |
1204 | goto done; | |
1205 | ||
1206 | set_bit(HFI1_CTXT_SETUP_DONE, &uctxt->event_flags); | |
1207 | done: | |
1208 | return ret; | |
1209 | } | |
1210 | ||
1211 | static int get_base_info(struct file *fp, void __user *ubase, __u32 len) | |
1212 | { | |
1213 | struct hfi1_base_info binfo; | |
9e10af47 IW |
1214 | struct hfi1_filedata *fd = fp->private_data; |
1215 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1216 | struct hfi1_devdata *dd = uctxt->dd; |
1217 | ssize_t sz; | |
1218 | unsigned offset; | |
1219 | int ret = 0; | |
1220 | ||
1221 | trace_hfi1_uctxtdata(uctxt->dd, uctxt); | |
1222 | ||
1223 | memset(&binfo, 0, sizeof(binfo)); | |
1224 | binfo.hw_version = dd->revision; | |
1225 | binfo.sw_version = HFI1_KERN_SWVERSION; | |
1226 | binfo.bthqp = kdeth_qp; | |
1227 | binfo.jkey = uctxt->jkey; | |
1228 | /* | |
1229 | * If more than 64 contexts are enabled the allocated credit | |
1230 | * return will span two or three contiguous pages. Since we only | |
1231 | * map the page containing the context's credit return address, | |
1232 | * we need to calculate the offset in the proper page. | |
1233 | */ | |
1234 | offset = ((u64)uctxt->sc->hw_free - | |
1235 | (u64)dd->cr_base[uctxt->numa_id].va) % PAGE_SIZE; | |
1236 | binfo.sc_credits_addr = HFI1_MMAP_TOKEN(PIO_CRED, uctxt->ctxt, | |
9e10af47 | 1237 | fd->subctxt, offset); |
77241056 | 1238 | binfo.pio_bufbase = HFI1_MMAP_TOKEN(PIO_BUFS, uctxt->ctxt, |
9e10af47 | 1239 | fd->subctxt, |
77241056 MM |
1240 | uctxt->sc->base_addr); |
1241 | binfo.pio_bufbase_sop = HFI1_MMAP_TOKEN(PIO_BUFS_SOP, | |
1242 | uctxt->ctxt, | |
9e10af47 | 1243 | fd->subctxt, |
77241056 MM |
1244 | uctxt->sc->base_addr); |
1245 | binfo.rcvhdr_bufbase = HFI1_MMAP_TOKEN(RCV_HDRQ, uctxt->ctxt, | |
9e10af47 | 1246 | fd->subctxt, |
77241056 MM |
1247 | uctxt->rcvhdrq); |
1248 | binfo.rcvegr_bufbase = HFI1_MMAP_TOKEN(RCV_EGRBUF, uctxt->ctxt, | |
9e10af47 | 1249 | fd->subctxt, |
77241056 MM |
1250 | uctxt->egrbufs.rcvtids[0].phys); |
1251 | binfo.sdma_comp_bufbase = HFI1_MMAP_TOKEN(SDMA_COMP, uctxt->ctxt, | |
9e10af47 | 1252 | fd->subctxt, 0); |
77241056 MM |
1253 | /* |
1254 | * user regs are at | |
1255 | * (RXE_PER_CONTEXT_USER + (ctxt * RXE_PER_CONTEXT_SIZE)) | |
1256 | */ | |
1257 | binfo.user_regbase = HFI1_MMAP_TOKEN(UREGS, uctxt->ctxt, | |
9e10af47 | 1258 | fd->subctxt, 0); |
e260e404 | 1259 | offset = offset_in_page((((uctxt->ctxt - dd->first_user_ctxt) * |
9e10af47 | 1260 | HFI1_MAX_SHARED_CTXTS) + fd->subctxt) * |
e260e404 | 1261 | sizeof(*dd->events)); |
77241056 | 1262 | binfo.events_bufbase = HFI1_MMAP_TOKEN(EVENTS, uctxt->ctxt, |
9e10af47 | 1263 | fd->subctxt, |
77241056 MM |
1264 | offset); |
1265 | binfo.status_bufbase = HFI1_MMAP_TOKEN(STATUS, uctxt->ctxt, | |
9e10af47 | 1266 | fd->subctxt, |
77241056 MM |
1267 | dd->status); |
1268 | if (HFI1_CAP_IS_USET(DMA_RTAIL)) | |
1269 | binfo.rcvhdrtail_base = HFI1_MMAP_TOKEN(RTAIL, uctxt->ctxt, | |
9e10af47 | 1270 | fd->subctxt, 0); |
77241056 MM |
1271 | if (uctxt->subctxt_cnt) { |
1272 | binfo.subctxt_uregbase = HFI1_MMAP_TOKEN(SUBCTXT_UREGS, | |
1273 | uctxt->ctxt, | |
9e10af47 | 1274 | fd->subctxt, 0); |
77241056 MM |
1275 | binfo.subctxt_rcvhdrbuf = HFI1_MMAP_TOKEN(SUBCTXT_RCV_HDRQ, |
1276 | uctxt->ctxt, | |
9e10af47 | 1277 | fd->subctxt, 0); |
77241056 MM |
1278 | binfo.subctxt_rcvegrbuf = HFI1_MMAP_TOKEN(SUBCTXT_EGRBUF, |
1279 | uctxt->ctxt, | |
9e10af47 | 1280 | fd->subctxt, 0); |
77241056 MM |
1281 | } |
1282 | sz = (len < sizeof(binfo)) ? len : sizeof(binfo); | |
1283 | if (copy_to_user(ubase, &binfo, sz)) | |
1284 | ret = -EFAULT; | |
1285 | return ret; | |
1286 | } | |
1287 | ||
1288 | static unsigned int poll_urgent(struct file *fp, | |
1289 | struct poll_table_struct *pt) | |
1290 | { | |
9e10af47 IW |
1291 | struct hfi1_filedata *fd = fp->private_data; |
1292 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1293 | struct hfi1_devdata *dd = uctxt->dd; |
1294 | unsigned pollflag; | |
1295 | ||
1296 | poll_wait(fp, &uctxt->wait, pt); | |
1297 | ||
1298 | spin_lock_irq(&dd->uctxt_lock); | |
1299 | if (uctxt->urgent != uctxt->urgent_poll) { | |
1300 | pollflag = POLLIN | POLLRDNORM; | |
1301 | uctxt->urgent_poll = uctxt->urgent; | |
1302 | } else { | |
1303 | pollflag = 0; | |
1304 | set_bit(HFI1_CTXT_WAITING_URG, &uctxt->event_flags); | |
1305 | } | |
1306 | spin_unlock_irq(&dd->uctxt_lock); | |
1307 | ||
1308 | return pollflag; | |
1309 | } | |
1310 | ||
1311 | static unsigned int poll_next(struct file *fp, | |
1312 | struct poll_table_struct *pt) | |
1313 | { | |
9e10af47 IW |
1314 | struct hfi1_filedata *fd = fp->private_data; |
1315 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1316 | struct hfi1_devdata *dd = uctxt->dd; |
1317 | unsigned pollflag; | |
1318 | ||
1319 | poll_wait(fp, &uctxt->wait, pt); | |
1320 | ||
1321 | spin_lock_irq(&dd->uctxt_lock); | |
1322 | if (hdrqempty(uctxt)) { | |
1323 | set_bit(HFI1_CTXT_WAITING_RCV, &uctxt->event_flags); | |
1324 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_ENB, uctxt->ctxt); | |
1325 | pollflag = 0; | |
e490974e | 1326 | } else { |
77241056 | 1327 | pollflag = POLLIN | POLLRDNORM; |
e490974e | 1328 | } |
77241056 MM |
1329 | spin_unlock_irq(&dd->uctxt_lock); |
1330 | ||
1331 | return pollflag; | |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * Find all user contexts in use, and set the specified bit in their | |
1336 | * event mask. | |
1337 | * See also find_ctxt() for a similar use, that is specific to send buffers. | |
1338 | */ | |
1339 | int hfi1_set_uevent_bits(struct hfi1_pportdata *ppd, const int evtbit) | |
1340 | { | |
1341 | struct hfi1_ctxtdata *uctxt; | |
1342 | struct hfi1_devdata *dd = ppd->dd; | |
1343 | unsigned ctxt; | |
1344 | int ret = 0; | |
1345 | unsigned long flags; | |
1346 | ||
1347 | if (!dd->events) { | |
1348 | ret = -EINVAL; | |
1349 | goto done; | |
1350 | } | |
1351 | ||
1352 | spin_lock_irqsave(&dd->uctxt_lock, flags); | |
1353 | for (ctxt = dd->first_user_ctxt; ctxt < dd->num_rcv_contexts; | |
1354 | ctxt++) { | |
1355 | uctxt = dd->rcd[ctxt]; | |
1356 | if (uctxt) { | |
1357 | unsigned long *evs = dd->events + | |
1358 | (uctxt->ctxt - dd->first_user_ctxt) * | |
1359 | HFI1_MAX_SHARED_CTXTS; | |
1360 | int i; | |
1361 | /* | |
1362 | * subctxt_cnt is 0 if not shared, so do base | |
1363 | * separately, first, then remaining subctxt, if any | |
1364 | */ | |
1365 | set_bit(evtbit, evs); | |
1366 | for (i = 1; i < uctxt->subctxt_cnt; i++) | |
1367 | set_bit(evtbit, evs + i); | |
1368 | } | |
1369 | } | |
1370 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
1371 | done: | |
1372 | return ret; | |
1373 | } | |
1374 | ||
1375 | /** | |
1376 | * manage_rcvq - manage a context's receive queue | |
1377 | * @uctxt: the context | |
1378 | * @subctxt: the sub-context | |
1379 | * @start_stop: action to carry out | |
1380 | * | |
1381 | * start_stop == 0 disables receive on the context, for use in queue | |
1382 | * overflow conditions. start_stop==1 re-enables, to be used to | |
1383 | * re-init the software copy of the head register | |
1384 | */ | |
1385 | static int manage_rcvq(struct hfi1_ctxtdata *uctxt, unsigned subctxt, | |
1386 | int start_stop) | |
1387 | { | |
1388 | struct hfi1_devdata *dd = uctxt->dd; | |
1389 | unsigned int rcvctrl_op; | |
1390 | ||
1391 | if (subctxt) | |
1392 | goto bail; | |
1393 | /* atomically clear receive enable ctxt. */ | |
1394 | if (start_stop) { | |
1395 | /* | |
1396 | * On enable, force in-memory copy of the tail register to | |
1397 | * 0, so that protocol code doesn't have to worry about | |
1398 | * whether or not the chip has yet updated the in-memory | |
1399 | * copy or not on return from the system call. The chip | |
1400 | * always resets it's tail register back to 0 on a | |
1401 | * transition from disabled to enabled. | |
1402 | */ | |
1403 | if (uctxt->rcvhdrtail_kvaddr) | |
1404 | clear_rcvhdrtail(uctxt); | |
1405 | rcvctrl_op = HFI1_RCVCTRL_CTXT_ENB; | |
e490974e | 1406 | } else { |
77241056 | 1407 | rcvctrl_op = HFI1_RCVCTRL_CTXT_DIS; |
e490974e | 1408 | } |
77241056 MM |
1409 | hfi1_rcvctrl(dd, rcvctrl_op, uctxt->ctxt); |
1410 | /* always; new head should be equal to new tail; see above */ | |
1411 | bail: | |
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * clear the event notifier events for this context. | |
1417 | * User process then performs actions appropriate to bit having been | |
1418 | * set, if desired, and checks again in future. | |
1419 | */ | |
1420 | static int user_event_ack(struct hfi1_ctxtdata *uctxt, int subctxt, | |
1421 | unsigned long events) | |
1422 | { | |
1423 | int i; | |
1424 | struct hfi1_devdata *dd = uctxt->dd; | |
1425 | unsigned long *evs; | |
1426 | ||
1427 | if (!dd->events) | |
1428 | return 0; | |
1429 | ||
1430 | evs = dd->events + ((uctxt->ctxt - dd->first_user_ctxt) * | |
1431 | HFI1_MAX_SHARED_CTXTS) + subctxt; | |
1432 | ||
1433 | for (i = 0; i <= _HFI1_MAX_EVENT_BIT; i++) { | |
1434 | if (!test_bit(i, &events)) | |
1435 | continue; | |
1436 | clear_bit(i, evs); | |
1437 | } | |
1438 | return 0; | |
1439 | } | |
1440 | ||
77241056 MM |
1441 | static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned subctxt, |
1442 | u16 pkey) | |
1443 | { | |
1444 | int ret = -ENOENT, i, intable = 0; | |
1445 | struct hfi1_pportdata *ppd = uctxt->ppd; | |
1446 | struct hfi1_devdata *dd = uctxt->dd; | |
1447 | ||
1448 | if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY) { | |
1449 | ret = -EINVAL; | |
1450 | goto done; | |
1451 | } | |
1452 | ||
1453 | for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) | |
1454 | if (pkey == ppd->pkeys[i]) { | |
1455 | intable = 1; | |
1456 | break; | |
1457 | } | |
1458 | ||
1459 | if (intable) | |
1460 | ret = hfi1_set_ctxt_pkey(dd, uctxt->ctxt, pkey); | |
1461 | done: | |
1462 | return ret; | |
1463 | } | |
1464 | ||
77241056 MM |
1465 | static void user_remove(struct hfi1_devdata *dd) |
1466 | { | |
77241056 MM |
1467 | |
1468 | hfi1_cdev_cleanup(&dd->user_cdev, &dd->user_device); | |
77241056 MM |
1469 | } |
1470 | ||
1471 | static int user_add(struct hfi1_devdata *dd) | |
1472 | { | |
1473 | char name[10]; | |
1474 | int ret; | |
1475 | ||
77241056 | 1476 | snprintf(name, sizeof(name), "%s_%d", class_name(), dd->unit); |
0eb62659 | 1477 | ret = hfi1_cdev_init(dd->unit, name, &hfi1_file_ops, |
e116a64f | 1478 | &dd->user_cdev, &dd->user_device, |
e11ffbd5 | 1479 | true, &dd->kobj); |
77241056 | 1480 | if (ret) |
7312f29d | 1481 | user_remove(dd); |
77241056 | 1482 | |
77241056 MM |
1483 | return ret; |
1484 | } | |
1485 | ||
1486 | /* | |
1487 | * Create per-unit files in /dev | |
1488 | */ | |
1489 | int hfi1_device_create(struct hfi1_devdata *dd) | |
1490 | { | |
0f7b1f91 | 1491 | return user_add(dd); |
77241056 MM |
1492 | } |
1493 | ||
1494 | /* | |
1495 | * Remove per-unit files in /dev | |
1496 | * void, core kernel returns no errors for this stuff | |
1497 | */ | |
1498 | void hfi1_device_remove(struct hfi1_devdata *dd) | |
1499 | { | |
1500 | user_remove(dd); | |
77241056 | 1501 | } |