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77241056 | 1 | /* |
2280740f | 2 | * Copyright(c) 2015-2017 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> |
6e84f315 | 51 | #include <linux/sched/mm.h> |
8737ce95 | 52 | #include <linux/bitmap.h> |
77241056 | 53 | |
e6bd18f5 JG |
54 | #include <rdma/ib.h> |
55 | ||
77241056 MM |
56 | #include "hfi.h" |
57 | #include "pio.h" | |
58 | #include "device.h" | |
59 | #include "common.h" | |
60 | #include "trace.h" | |
637f4600 | 61 | #include "mmu_rb.h" |
77241056 | 62 | #include "user_sdma.h" |
701e441d | 63 | #include "user_exp_rcv.h" |
affa48de | 64 | #include "aspm.h" |
77241056 MM |
65 | |
66 | #undef pr_fmt | |
67 | #define pr_fmt(fmt) DRIVER_NAME ": " fmt | |
68 | ||
69 | #define SEND_CTXT_HALT_TIMEOUT 1000 /* msecs */ | |
70 | ||
71 | /* | |
72 | * File operation functions | |
73 | */ | |
f4cd8765 MR |
74 | static int hfi1_file_open(struct inode *inode, struct file *fp); |
75 | static int hfi1_file_close(struct inode *inode, struct file *fp); | |
76 | static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from); | |
77 | static unsigned int hfi1_poll(struct file *fp, struct poll_table_struct *pt); | |
78 | static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma); | |
77241056 | 79 | |
f4cd8765 | 80 | static u64 kvirt_to_phys(void *addr); |
5fbded48 | 81 | static int assign_ctxt(struct hfi1_filedata *fd, struct hfi1_user_info *uinfo); |
f2a3bc00 MR |
82 | static void init_subctxts(struct hfi1_ctxtdata *uctxt, |
83 | const struct hfi1_user_info *uinfo); | |
e87473bc MR |
84 | static int init_user_ctxt(struct hfi1_filedata *fd, |
85 | struct hfi1_ctxtdata *uctxt); | |
62239fc6 | 86 | static void user_init(struct hfi1_ctxtdata *uctxt); |
5042cddf MR |
87 | static int get_ctxt_info(struct hfi1_filedata *fd, void __user *ubase, |
88 | __u32 len); | |
89 | static int get_base_info(struct hfi1_filedata *fd, void __user *ubase, | |
90 | __u32 len); | |
e87473bc MR |
91 | static int setup_base_ctxt(struct hfi1_filedata *fd, |
92 | struct hfi1_ctxtdata *uctxt); | |
f4cd8765 | 93 | static int setup_subctxt(struct hfi1_ctxtdata *uctxt); |
5fbded48 | 94 | |
9b60d2cb MR |
95 | static int find_sub_ctxt(struct hfi1_filedata *fd, |
96 | const struct hfi1_user_info *uinfo); | |
5042cddf | 97 | static int allocate_ctxt(struct hfi1_filedata *fd, struct hfi1_devdata *dd, |
e87473bc MR |
98 | struct hfi1_user_info *uinfo, |
99 | struct hfi1_ctxtdata **cd); | |
42492011 | 100 | static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt); |
f4cd8765 MR |
101 | static unsigned int poll_urgent(struct file *fp, struct poll_table_struct *pt); |
102 | static unsigned int poll_next(struct file *fp, struct poll_table_struct *pt); | |
8737ce95 | 103 | static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt, |
f4cd8765 | 104 | unsigned long events); |
8737ce95 MR |
105 | static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, u16 subctxt, u16 pkey); |
106 | static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt, | |
f4cd8765 MR |
107 | int start_stop); |
108 | static int vma_fault(struct vm_fault *vmf); | |
8d970cf9 DD |
109 | static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, |
110 | unsigned long arg); | |
77241056 MM |
111 | |
112 | static const struct file_operations hfi1_file_ops = { | |
113 | .owner = THIS_MODULE, | |
77241056 MM |
114 | .write_iter = hfi1_write_iter, |
115 | .open = hfi1_file_open, | |
116 | .release = hfi1_file_close, | |
8d970cf9 | 117 | .unlocked_ioctl = hfi1_file_ioctl, |
77241056 MM |
118 | .poll = hfi1_poll, |
119 | .mmap = hfi1_file_mmap, | |
120 | .llseek = noop_llseek, | |
121 | }; | |
122 | ||
733da3bc | 123 | static const struct vm_operations_struct vm_ops = { |
77241056 MM |
124 | .fault = vma_fault, |
125 | }; | |
126 | ||
127 | /* | |
128 | * Types of memories mapped into user processes' space | |
129 | */ | |
130 | enum mmap_types { | |
131 | PIO_BUFS = 1, | |
132 | PIO_BUFS_SOP, | |
133 | PIO_CRED, | |
134 | RCV_HDRQ, | |
135 | RCV_EGRBUF, | |
136 | UREGS, | |
137 | EVENTS, | |
138 | STATUS, | |
139 | RTAIL, | |
140 | SUBCTXT_UREGS, | |
141 | SUBCTXT_RCV_HDRQ, | |
142 | SUBCTXT_EGRBUF, | |
143 | SDMA_COMP | |
144 | }; | |
145 | ||
146 | /* | |
147 | * Masks and offsets defining the mmap tokens | |
148 | */ | |
149 | #define HFI1_MMAP_OFFSET_MASK 0xfffULL | |
150 | #define HFI1_MMAP_OFFSET_SHIFT 0 | |
151 | #define HFI1_MMAP_SUBCTXT_MASK 0xfULL | |
152 | #define HFI1_MMAP_SUBCTXT_SHIFT 12 | |
153 | #define HFI1_MMAP_CTXT_MASK 0xffULL | |
154 | #define HFI1_MMAP_CTXT_SHIFT 16 | |
155 | #define HFI1_MMAP_TYPE_MASK 0xfULL | |
156 | #define HFI1_MMAP_TYPE_SHIFT 24 | |
157 | #define HFI1_MMAP_MAGIC_MASK 0xffffffffULL | |
158 | #define HFI1_MMAP_MAGIC_SHIFT 32 | |
159 | ||
160 | #define HFI1_MMAP_MAGIC 0xdabbad00 | |
161 | ||
162 | #define HFI1_MMAP_TOKEN_SET(field, val) \ | |
163 | (((val) & HFI1_MMAP_##field##_MASK) << HFI1_MMAP_##field##_SHIFT) | |
164 | #define HFI1_MMAP_TOKEN_GET(field, token) \ | |
165 | (((token) >> HFI1_MMAP_##field##_SHIFT) & HFI1_MMAP_##field##_MASK) | |
166 | #define HFI1_MMAP_TOKEN(type, ctxt, subctxt, addr) \ | |
167 | (HFI1_MMAP_TOKEN_SET(MAGIC, HFI1_MMAP_MAGIC) | \ | |
168 | HFI1_MMAP_TOKEN_SET(TYPE, type) | \ | |
169 | HFI1_MMAP_TOKEN_SET(CTXT, ctxt) | \ | |
170 | HFI1_MMAP_TOKEN_SET(SUBCTXT, subctxt) | \ | |
e260e404 | 171 | HFI1_MMAP_TOKEN_SET(OFFSET, (offset_in_page(addr)))) |
77241056 | 172 | |
77241056 MM |
173 | #define dbg(fmt, ...) \ |
174 | pr_info(fmt, ##__VA_ARGS__) | |
175 | ||
77241056 MM |
176 | static inline int is_valid_mmap(u64 token) |
177 | { | |
178 | return (HFI1_MMAP_TOKEN_GET(MAGIC, token) == HFI1_MMAP_MAGIC); | |
179 | } | |
180 | ||
181 | static int hfi1_file_open(struct inode *inode, struct file *fp) | |
182 | { | |
ea3a0ee5 | 183 | struct hfi1_filedata *fd; |
e11ffbd5 DD |
184 | struct hfi1_devdata *dd = container_of(inode->i_cdev, |
185 | struct hfi1_devdata, | |
186 | user_cdev); | |
187 | ||
cb51c5d2 | 188 | if (!((dd->flags & HFI1_PRESENT) && dd->kregbase1)) |
5fbded48 MR |
189 | return -EINVAL; |
190 | ||
acd7c8fe TS |
191 | if (!atomic_inc_not_zero(&dd->user_refcount)) |
192 | return -ENXIO; | |
193 | ||
e11ffbd5 DD |
194 | /* Just take a ref now. Not all opens result in a context assign */ |
195 | kobject_get(&dd->kobj); | |
196 | ||
77241056 | 197 | /* The real work is performed later in assign_ctxt() */ |
ea3a0ee5 IW |
198 | |
199 | fd = kzalloc(sizeof(*fd), GFP_KERNEL); | |
200 | ||
3faa3d9a IW |
201 | if (fd) { |
202 | fd->rec_cpu_num = -1; /* no cpu affinity by default */ | |
203 | fd->mm = current->mm; | |
f1f10076 | 204 | mmgrab(fd->mm); |
5fbded48 | 205 | fd->dd = dd; |
acd7c8fe TS |
206 | fp->private_data = fd; |
207 | } else { | |
208 | fp->private_data = NULL; | |
209 | ||
210 | if (atomic_dec_and_test(&dd->user_refcount)) | |
211 | complete(&dd->user_comp); | |
ea3a0ee5 | 212 | |
acd7c8fe TS |
213 | return -ENOMEM; |
214 | } | |
ea3a0ee5 | 215 | |
acd7c8fe | 216 | return 0; |
77241056 MM |
217 | } |
218 | ||
8d970cf9 DD |
219 | static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, |
220 | unsigned long arg) | |
221 | { | |
222 | struct hfi1_filedata *fd = fp->private_data; | |
223 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
224 | struct hfi1_user_info uinfo; | |
225 | struct hfi1_tid_info tinfo; | |
226 | int ret = 0; | |
227 | unsigned long addr; | |
228 | int uval = 0; | |
229 | unsigned long ul_uval = 0; | |
230 | u16 uval16 = 0; | |
231 | ||
8a1882eb | 232 | hfi1_cdbg(IOCTL, "IOCTL recv: 0x%x", cmd); |
8d970cf9 DD |
233 | if (cmd != HFI1_IOCTL_ASSIGN_CTXT && |
234 | cmd != HFI1_IOCTL_GET_VERS && | |
235 | !uctxt) | |
236 | return -EINVAL; | |
237 | ||
238 | switch (cmd) { | |
239 | case HFI1_IOCTL_ASSIGN_CTXT: | |
ca2f30a0 IW |
240 | if (uctxt) |
241 | return -EINVAL; | |
242 | ||
8d970cf9 DD |
243 | if (copy_from_user(&uinfo, |
244 | (struct hfi1_user_info __user *)arg, | |
245 | sizeof(uinfo))) | |
246 | return -EFAULT; | |
247 | ||
5fbded48 | 248 | ret = assign_ctxt(fd, &uinfo); |
8d970cf9 DD |
249 | break; |
250 | case HFI1_IOCTL_CTXT_INFO: | |
5042cddf | 251 | ret = get_ctxt_info(fd, (void __user *)(unsigned long)arg, |
8d970cf9 DD |
252 | sizeof(struct hfi1_ctxt_info)); |
253 | break; | |
254 | case HFI1_IOCTL_USER_INFO: | |
5042cddf | 255 | ret = get_base_info(fd, (void __user *)(unsigned long)arg, |
8d970cf9 DD |
256 | sizeof(struct hfi1_base_info)); |
257 | break; | |
258 | case HFI1_IOCTL_CREDIT_UPD: | |
f7ca535b | 259 | if (uctxt) |
8d970cf9 DD |
260 | sc_return_credits(uctxt->sc); |
261 | break; | |
262 | ||
263 | case HFI1_IOCTL_TID_UPDATE: | |
264 | if (copy_from_user(&tinfo, | |
265 | (struct hfi11_tid_info __user *)arg, | |
266 | sizeof(tinfo))) | |
267 | return -EFAULT; | |
268 | ||
5042cddf | 269 | ret = hfi1_user_exp_rcv_setup(fd, &tinfo); |
8d970cf9 DD |
270 | if (!ret) { |
271 | /* | |
272 | * Copy the number of tidlist entries we used | |
273 | * and the length of the buffer we registered. | |
8d970cf9 DD |
274 | */ |
275 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
276 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
f13a6e5e MR |
277 | sizeof(tinfo.tidcnt))) |
278 | return -EFAULT; | |
279 | ||
280 | addr = arg + offsetof(struct hfi1_tid_info, length); | |
281 | if (copy_to_user((void __user *)addr, &tinfo.length, | |
8d970cf9 DD |
282 | sizeof(tinfo.length))) |
283 | ret = -EFAULT; | |
284 | } | |
285 | break; | |
286 | ||
287 | case HFI1_IOCTL_TID_FREE: | |
288 | if (copy_from_user(&tinfo, | |
289 | (struct hfi11_tid_info __user *)arg, | |
290 | sizeof(tinfo))) | |
291 | return -EFAULT; | |
292 | ||
5042cddf | 293 | ret = hfi1_user_exp_rcv_clear(fd, &tinfo); |
8d970cf9 DD |
294 | if (ret) |
295 | break; | |
296 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
297 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
298 | sizeof(tinfo.tidcnt))) | |
299 | ret = -EFAULT; | |
300 | break; | |
301 | ||
302 | case HFI1_IOCTL_TID_INVAL_READ: | |
303 | if (copy_from_user(&tinfo, | |
304 | (struct hfi11_tid_info __user *)arg, | |
305 | sizeof(tinfo))) | |
306 | return -EFAULT; | |
307 | ||
5042cddf | 308 | ret = hfi1_user_exp_rcv_invalid(fd, &tinfo); |
8d970cf9 DD |
309 | if (ret) |
310 | break; | |
311 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
312 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
313 | sizeof(tinfo.tidcnt))) | |
314 | ret = -EFAULT; | |
315 | break; | |
316 | ||
317 | case HFI1_IOCTL_RECV_CTRL: | |
318 | ret = get_user(uval, (int __user *)arg); | |
319 | if (ret != 0) | |
320 | return -EFAULT; | |
321 | ret = manage_rcvq(uctxt, fd->subctxt, uval); | |
322 | break; | |
323 | ||
324 | case HFI1_IOCTL_POLL_TYPE: | |
325 | ret = get_user(uval, (int __user *)arg); | |
326 | if (ret != 0) | |
327 | return -EFAULT; | |
328 | uctxt->poll_type = (typeof(uctxt->poll_type))uval; | |
329 | break; | |
330 | ||
331 | case HFI1_IOCTL_ACK_EVENT: | |
332 | ret = get_user(ul_uval, (unsigned long __user *)arg); | |
333 | if (ret != 0) | |
334 | return -EFAULT; | |
335 | ret = user_event_ack(uctxt, fd->subctxt, ul_uval); | |
336 | break; | |
337 | ||
338 | case HFI1_IOCTL_SET_PKEY: | |
339 | ret = get_user(uval16, (u16 __user *)arg); | |
340 | if (ret != 0) | |
341 | return -EFAULT; | |
342 | if (HFI1_CAP_IS_USET(PKEY_CHECK)) | |
343 | ret = set_ctxt_pkey(uctxt, fd->subctxt, uval16); | |
344 | else | |
345 | return -EPERM; | |
346 | break; | |
347 | ||
348 | case HFI1_IOCTL_CTXT_RESET: { | |
349 | struct send_context *sc; | |
350 | struct hfi1_devdata *dd; | |
351 | ||
352 | if (!uctxt || !uctxt->dd || !uctxt->sc) | |
353 | return -EINVAL; | |
354 | ||
355 | /* | |
356 | * There is no protection here. User level has to | |
357 | * guarantee that no one will be writing to the send | |
358 | * context while it is being re-initialized. | |
359 | * If user level breaks that guarantee, it will break | |
360 | * it's own context and no one else's. | |
361 | */ | |
362 | dd = uctxt->dd; | |
363 | sc = uctxt->sc; | |
364 | /* | |
365 | * Wait until the interrupt handler has marked the | |
366 | * context as halted or frozen. Report error if we time | |
367 | * out. | |
368 | */ | |
369 | wait_event_interruptible_timeout( | |
370 | sc->halt_wait, (sc->flags & SCF_HALTED), | |
371 | msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT)); | |
372 | if (!(sc->flags & SCF_HALTED)) | |
373 | return -ENOLCK; | |
374 | ||
375 | /* | |
376 | * If the send context was halted due to a Freeze, | |
377 | * wait until the device has been "unfrozen" before | |
378 | * resetting the context. | |
379 | */ | |
380 | if (sc->flags & SCF_FROZEN) { | |
381 | wait_event_interruptible_timeout( | |
382 | dd->event_queue, | |
6aa7de05 | 383 | !(READ_ONCE(dd->flags) & HFI1_FROZEN), |
8d970cf9 DD |
384 | msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT)); |
385 | if (dd->flags & HFI1_FROZEN) | |
386 | return -ENOLCK; | |
387 | ||
388 | if (dd->flags & HFI1_FORCED_FREEZE) | |
389 | /* | |
390 | * Don't allow context reset if we are into | |
391 | * forced freeze | |
392 | */ | |
393 | return -ENODEV; | |
394 | ||
395 | sc_disable(sc); | |
396 | ret = sc_enable(sc); | |
2250563e | 397 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB, uctxt); |
8d970cf9 DD |
398 | } else { |
399 | ret = sc_restart(sc); | |
400 | } | |
401 | if (!ret) | |
402 | sc_return_credits(sc); | |
403 | break; | |
404 | } | |
405 | ||
406 | case HFI1_IOCTL_GET_VERS: | |
407 | uval = HFI1_USER_SWVERSION; | |
408 | if (put_user(uval, (int __user *)arg)) | |
409 | return -EFAULT; | |
410 | break; | |
411 | ||
412 | default: | |
413 | return -EINVAL; | |
414 | } | |
415 | ||
416 | return ret; | |
417 | } | |
418 | ||
77241056 MM |
419 | static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from) |
420 | { | |
9e10af47 IW |
421 | struct hfi1_filedata *fd = kiocb->ki_filp->private_data; |
422 | struct hfi1_user_sdma_pkt_q *pq = fd->pq; | |
423 | struct hfi1_user_sdma_comp_q *cq = fd->cq; | |
0904f327 | 424 | int done = 0, reqs = 0; |
77241056 MM |
425 | unsigned long dim = from->nr_segs; |
426 | ||
0904f327 IW |
427 | if (!cq || !pq) |
428 | return -EIO; | |
77241056 | 429 | |
0904f327 IW |
430 | if (!iter_is_iovec(from) || !dim) |
431 | return -EINVAL; | |
77241056 | 432 | |
34ab4de7 | 433 | trace_hfi1_sdma_request(fd->dd, fd->uctxt->ctxt, fd->subctxt, dim); |
77241056 | 434 | |
0904f327 IW |
435 | if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) |
436 | return -ENOSPC; | |
77241056 MM |
437 | |
438 | while (dim) { | |
0904f327 | 439 | int ret; |
77241056 MM |
440 | unsigned long count = 0; |
441 | ||
442 | ret = hfi1_user_sdma_process_request( | |
5042cddf | 443 | fd, (struct iovec *)(from->iov + done), |
77241056 | 444 | dim, &count); |
0904f327 IW |
445 | if (ret) { |
446 | reqs = ret; | |
447 | break; | |
448 | } | |
77241056 MM |
449 | dim -= count; |
450 | done += count; | |
451 | reqs++; | |
452 | } | |
0904f327 IW |
453 | |
454 | return reqs; | |
77241056 MM |
455 | } |
456 | ||
457 | static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma) | |
458 | { | |
9e10af47 IW |
459 | struct hfi1_filedata *fd = fp->private_data; |
460 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 | 461 | struct hfi1_devdata *dd; |
60368186 | 462 | unsigned long flags; |
77241056 MM |
463 | u64 token = vma->vm_pgoff << PAGE_SHIFT, |
464 | memaddr = 0; | |
60368186 | 465 | void *memvirt = NULL; |
77241056 MM |
466 | u8 subctxt, mapio = 0, vmf = 0, type; |
467 | ssize_t memlen = 0; | |
468 | int ret = 0; | |
469 | u16 ctxt; | |
470 | ||
77241056 MM |
471 | if (!is_valid_mmap(token) || !uctxt || |
472 | !(vma->vm_flags & VM_SHARED)) { | |
473 | ret = -EINVAL; | |
474 | goto done; | |
475 | } | |
476 | dd = uctxt->dd; | |
477 | ctxt = HFI1_MMAP_TOKEN_GET(CTXT, token); | |
478 | subctxt = HFI1_MMAP_TOKEN_GET(SUBCTXT, token); | |
479 | type = HFI1_MMAP_TOKEN_GET(TYPE, token); | |
9e10af47 | 480 | if (ctxt != uctxt->ctxt || subctxt != fd->subctxt) { |
77241056 MM |
481 | ret = -EINVAL; |
482 | goto done; | |
483 | } | |
484 | ||
485 | flags = vma->vm_flags; | |
486 | ||
487 | switch (type) { | |
488 | case PIO_BUFS: | |
489 | case PIO_BUFS_SOP: | |
490 | memaddr = ((dd->physaddr + TXE_PIO_SEND) + | |
491 | /* chip pio base */ | |
d32cf44a | 492 | (uctxt->sc->hw_context * BIT(16))) + |
77241056 MM |
493 | /* 64K PIO space / ctxt */ |
494 | (type == PIO_BUFS_SOP ? | |
495 | (TXE_PIO_SIZE / 2) : 0); /* sop? */ | |
496 | /* | |
497 | * Map only the amount allocated to the context, not the | |
498 | * entire available context's PIO space. | |
499 | */ | |
437b29d1 | 500 | memlen = PAGE_ALIGN(uctxt->sc->credits * PIO_BLOCK_SIZE); |
77241056 MM |
501 | flags &= ~VM_MAYREAD; |
502 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
503 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
504 | mapio = 1; | |
505 | break; | |
506 | case PIO_CRED: | |
507 | if (flags & VM_WRITE) { | |
508 | ret = -EPERM; | |
509 | goto done; | |
510 | } | |
511 | /* | |
512 | * The credit return location for this context could be on the | |
513 | * second or third page allocated for credit returns (if number | |
514 | * of enabled contexts > 64 and 128 respectively). | |
515 | */ | |
60368186 TK |
516 | memvirt = dd->cr_base[uctxt->numa_id].va; |
517 | memaddr = virt_to_phys(memvirt) + | |
77241056 MM |
518 | (((u64)uctxt->sc->hw_free - |
519 | (u64)dd->cr_base[uctxt->numa_id].va) & PAGE_MASK); | |
520 | memlen = PAGE_SIZE; | |
521 | flags &= ~VM_MAYWRITE; | |
522 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
523 | /* | |
524 | * The driver has already allocated memory for credit | |
525 | * returns and programmed it into the chip. Has that | |
526 | * memory been flagged as non-cached? | |
527 | */ | |
528 | /* vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); */ | |
529 | mapio = 1; | |
530 | break; | |
531 | case RCV_HDRQ: | |
77241056 | 532 | memlen = uctxt->rcvhdrq_size; |
60368186 | 533 | memvirt = uctxt->rcvhdrq; |
77241056 MM |
534 | break; |
535 | case RCV_EGRBUF: { | |
536 | unsigned long addr; | |
537 | int i; | |
538 | /* | |
539 | * The RcvEgr buffer need to be handled differently | |
540 | * as multiple non-contiguous pages need to be mapped | |
541 | * into the user process. | |
542 | */ | |
543 | memlen = uctxt->egrbufs.size; | |
544 | if ((vma->vm_end - vma->vm_start) != memlen) { | |
545 | dd_dev_err(dd, "Eager buffer map size invalid (%lu != %lu)\n", | |
546 | (vma->vm_end - vma->vm_start), memlen); | |
547 | ret = -EINVAL; | |
548 | goto done; | |
549 | } | |
550 | if (vma->vm_flags & VM_WRITE) { | |
551 | ret = -EPERM; | |
552 | goto done; | |
553 | } | |
554 | vma->vm_flags &= ~VM_MAYWRITE; | |
555 | addr = vma->vm_start; | |
556 | for (i = 0 ; i < uctxt->egrbufs.numbufs; i++) { | |
60368186 TK |
557 | memlen = uctxt->egrbufs.buffers[i].len; |
558 | memvirt = uctxt->egrbufs.buffers[i].addr; | |
77241056 MM |
559 | ret = remap_pfn_range( |
560 | vma, addr, | |
60368186 TK |
561 | /* |
562 | * virt_to_pfn() does the same, but | |
563 | * it's not available on x86_64 | |
564 | * when CONFIG_MMU is enabled. | |
565 | */ | |
566 | PFN_DOWN(__pa(memvirt)), | |
567 | memlen, | |
77241056 MM |
568 | vma->vm_page_prot); |
569 | if (ret < 0) | |
570 | goto done; | |
60368186 | 571 | addr += memlen; |
77241056 MM |
572 | } |
573 | ret = 0; | |
574 | goto done; | |
575 | } | |
576 | case UREGS: | |
577 | /* | |
578 | * Map only the page that contains this context's user | |
579 | * registers. | |
580 | */ | |
581 | memaddr = (unsigned long) | |
582 | (dd->physaddr + RXE_PER_CONTEXT_USER) | |
583 | + (uctxt->ctxt * RXE_PER_CONTEXT_SIZE); | |
584 | /* | |
585 | * TidFlow table is on the same page as the rest of the | |
586 | * user registers. | |
587 | */ | |
588 | memlen = PAGE_SIZE; | |
589 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
590 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
591 | mapio = 1; | |
592 | break; | |
593 | case EVENTS: | |
594 | /* | |
595 | * Use the page where this context's flags are. User level | |
596 | * knows where it's own bitmap is within the page. | |
597 | */ | |
3c6c065a | 598 | memaddr = (unsigned long)(dd->events + |
2280740f VN |
599 | ((uctxt->ctxt - dd->first_dyn_alloc_ctxt) * |
600 | HFI1_MAX_SHARED_CTXTS)) & PAGE_MASK; | |
77241056 MM |
601 | memlen = PAGE_SIZE; |
602 | /* | |
603 | * v3.7 removes VM_RESERVED but the effect is kept by | |
604 | * using VM_IO. | |
605 | */ | |
606 | flags |= VM_IO | VM_DONTEXPAND; | |
607 | vmf = 1; | |
608 | break; | |
609 | case STATUS: | |
12220267 IW |
610 | if (flags & (unsigned long)(VM_WRITE | VM_EXEC)) { |
611 | ret = -EPERM; | |
612 | goto done; | |
613 | } | |
77241056 MM |
614 | memaddr = kvirt_to_phys((void *)dd->status); |
615 | memlen = PAGE_SIZE; | |
616 | flags |= VM_IO | VM_DONTEXPAND; | |
617 | break; | |
618 | case RTAIL: | |
619 | if (!HFI1_CAP_IS_USET(DMA_RTAIL)) { | |
620 | /* | |
621 | * If the memory allocation failed, the context alloc | |
622 | * also would have failed, so we would never get here | |
623 | */ | |
624 | ret = -EINVAL; | |
625 | goto done; | |
626 | } | |
627 | if (flags & VM_WRITE) { | |
628 | ret = -EPERM; | |
629 | goto done; | |
630 | } | |
77241056 | 631 | memlen = PAGE_SIZE; |
60368186 | 632 | memvirt = (void *)uctxt->rcvhdrtail_kvaddr; |
77241056 MM |
633 | flags &= ~VM_MAYWRITE; |
634 | break; | |
635 | case SUBCTXT_UREGS: | |
636 | memaddr = (u64)uctxt->subctxt_uregbase; | |
637 | memlen = PAGE_SIZE; | |
638 | flags |= VM_IO | VM_DONTEXPAND; | |
639 | vmf = 1; | |
640 | break; | |
641 | case SUBCTXT_RCV_HDRQ: | |
642 | memaddr = (u64)uctxt->subctxt_rcvhdr_base; | |
643 | memlen = uctxt->rcvhdrq_size * uctxt->subctxt_cnt; | |
644 | flags |= VM_IO | VM_DONTEXPAND; | |
645 | vmf = 1; | |
646 | break; | |
647 | case SUBCTXT_EGRBUF: | |
648 | memaddr = (u64)uctxt->subctxt_rcvegrbuf; | |
649 | memlen = uctxt->egrbufs.size * uctxt->subctxt_cnt; | |
650 | flags |= VM_IO | VM_DONTEXPAND; | |
651 | flags &= ~VM_MAYWRITE; | |
652 | vmf = 1; | |
653 | break; | |
654 | case SDMA_COMP: { | |
9e10af47 | 655 | struct hfi1_user_sdma_comp_q *cq = fd->cq; |
77241056 | 656 | |
9e10af47 | 657 | if (!cq) { |
77241056 MM |
658 | ret = -EFAULT; |
659 | goto done; | |
660 | } | |
77241056 | 661 | memaddr = (u64)cq->comps; |
437b29d1 | 662 | memlen = PAGE_ALIGN(sizeof(*cq->comps) * cq->nentries); |
77241056 MM |
663 | flags |= VM_IO | VM_DONTEXPAND; |
664 | vmf = 1; | |
665 | break; | |
666 | } | |
667 | default: | |
668 | ret = -EINVAL; | |
669 | break; | |
670 | } | |
671 | ||
672 | if ((vma->vm_end - vma->vm_start) != memlen) { | |
673 | hfi1_cdbg(PROC, "%u:%u Memory size mismatch %lu:%lu", | |
9e10af47 | 674 | uctxt->ctxt, fd->subctxt, |
77241056 MM |
675 | (vma->vm_end - vma->vm_start), memlen); |
676 | ret = -EINVAL; | |
677 | goto done; | |
678 | } | |
679 | ||
680 | vma->vm_flags = flags; | |
6c63e423 SS |
681 | hfi1_cdbg(PROC, |
682 | "%u:%u type:%u io/vf:%d/%d, addr:0x%llx, len:%lu(%lu), flags:0x%lx\n", | |
683 | ctxt, subctxt, type, mapio, vmf, memaddr, memlen, | |
77241056 | 684 | vma->vm_end - vma->vm_start, vma->vm_flags); |
77241056 | 685 | if (vmf) { |
60368186 | 686 | vma->vm_pgoff = PFN_DOWN(memaddr); |
77241056 MM |
687 | vma->vm_ops = &vm_ops; |
688 | ret = 0; | |
689 | } else if (mapio) { | |
60368186 TK |
690 | ret = io_remap_pfn_range(vma, vma->vm_start, |
691 | PFN_DOWN(memaddr), | |
692 | memlen, | |
77241056 | 693 | vma->vm_page_prot); |
60368186 TK |
694 | } else if (memvirt) { |
695 | ret = remap_pfn_range(vma, vma->vm_start, | |
696 | PFN_DOWN(__pa(memvirt)), | |
697 | memlen, | |
698 | vma->vm_page_prot); | |
77241056 | 699 | } else { |
60368186 TK |
700 | ret = remap_pfn_range(vma, vma->vm_start, |
701 | PFN_DOWN(memaddr), | |
702 | memlen, | |
77241056 MM |
703 | vma->vm_page_prot); |
704 | } | |
705 | done: | |
706 | return ret; | |
707 | } | |
708 | ||
709 | /* | |
710 | * Local (non-chip) user memory is not mapped right away but as it is | |
711 | * accessed by the user-level code. | |
712 | */ | |
11bac800 | 713 | static int vma_fault(struct vm_fault *vmf) |
77241056 MM |
714 | { |
715 | struct page *page; | |
716 | ||
717 | page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); | |
718 | if (!page) | |
719 | return VM_FAULT_SIGBUS; | |
720 | ||
721 | get_page(page); | |
722 | vmf->page = page; | |
723 | ||
724 | return 0; | |
725 | } | |
726 | ||
727 | static unsigned int hfi1_poll(struct file *fp, struct poll_table_struct *pt) | |
728 | { | |
729 | struct hfi1_ctxtdata *uctxt; | |
730 | unsigned pollflag; | |
731 | ||
9e10af47 | 732 | uctxt = ((struct hfi1_filedata *)fp->private_data)->uctxt; |
77241056 MM |
733 | if (!uctxt) |
734 | pollflag = POLLERR; | |
735 | else if (uctxt->poll_type == HFI1_POLL_TYPE_URGENT) | |
736 | pollflag = poll_urgent(fp, pt); | |
737 | else if (uctxt->poll_type == HFI1_POLL_TYPE_ANYRCV) | |
738 | pollflag = poll_next(fp, pt); | |
739 | else /* invalid */ | |
740 | pollflag = POLLERR; | |
741 | ||
742 | return pollflag; | |
743 | } | |
744 | ||
745 | static int hfi1_file_close(struct inode *inode, struct file *fp) | |
746 | { | |
747 | struct hfi1_filedata *fdata = fp->private_data; | |
748 | struct hfi1_ctxtdata *uctxt = fdata->uctxt; | |
e11ffbd5 DD |
749 | struct hfi1_devdata *dd = container_of(inode->i_cdev, |
750 | struct hfi1_devdata, | |
751 | user_cdev); | |
77241056 MM |
752 | unsigned long flags, *ev; |
753 | ||
754 | fp->private_data = NULL; | |
755 | ||
756 | if (!uctxt) | |
757 | goto done; | |
758 | ||
d295dbeb | 759 | hfi1_cdbg(PROC, "closing ctxt %u:%u", uctxt->ctxt, fdata->subctxt); |
77241056 MM |
760 | |
761 | flush_wc(); | |
762 | /* drain user sdma queue */ | |
e87473bc | 763 | hfi1_user_sdma_free_queues(fdata, uctxt); |
77241056 | 764 | |
957558c9 | 765 | /* release the cpu */ |
b094a36f | 766 | hfi1_put_proc_affinity(fdata->rec_cpu_num); |
957558c9 | 767 | |
224d71f9 MR |
768 | /* clean up rcv side */ |
769 | hfi1_user_exp_rcv_free(fdata); | |
770 | ||
d295dbeb MR |
771 | /* |
772 | * fdata->uctxt is used in the above cleanup. It is not ready to be | |
773 | * removed until here. | |
774 | */ | |
775 | fdata->uctxt = NULL; | |
776 | hfi1_rcd_put(uctxt); | |
777 | ||
77241056 MM |
778 | /* |
779 | * Clear any left over, unhandled events so the next process that | |
780 | * gets this context doesn't get confused. | |
781 | */ | |
2280740f | 782 | ev = dd->events + ((uctxt->ctxt - dd->first_dyn_alloc_ctxt) * |
77241056 MM |
783 | HFI1_MAX_SHARED_CTXTS) + fdata->subctxt; |
784 | *ev = 0; | |
785 | ||
d295dbeb | 786 | spin_lock_irqsave(&dd->uctxt_lock, flags); |
8737ce95 MR |
787 | __clear_bit(fdata->subctxt, uctxt->in_use_ctxts); |
788 | if (!bitmap_empty(uctxt->in_use_ctxts, HFI1_MAX_SHARED_CTXTS)) { | |
d295dbeb | 789 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); |
77241056 MM |
790 | goto done; |
791 | } | |
d295dbeb | 792 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); |
77241056 | 793 | |
77241056 MM |
794 | /* |
795 | * Disable receive context and interrupt available, reset all | |
796 | * RcvCtxtCtrl bits to default values. | |
797 | */ | |
798 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS | | |
799 | HFI1_RCVCTRL_TIDFLOW_DIS | | |
800 | HFI1_RCVCTRL_INTRAVAIL_DIS | | |
566c157c | 801 | HFI1_RCVCTRL_TAILUPD_DIS | |
77241056 MM |
802 | HFI1_RCVCTRL_ONE_PKT_EGR_DIS | |
803 | HFI1_RCVCTRL_NO_RHQ_DROP_DIS | | |
2250563e | 804 | HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt); |
77241056 | 805 | /* Clear the context's J_KEY */ |
17573972 | 806 | hfi1_clear_ctxt_jkey(dd, uctxt); |
77241056 | 807 | /* |
f683c80c MR |
808 | * If a send context is allocated, reset context integrity |
809 | * checks to default and disable the send context. | |
77241056 | 810 | */ |
f683c80c MR |
811 | if (uctxt->sc) { |
812 | set_pio_integrity(uctxt->sc); | |
813 | sc_disable(uctxt->sc); | |
814 | } | |
77241056 | 815 | |
9c1a99c3 | 816 | hfi1_free_ctxt_rcv_groups(uctxt); |
637a9a7f | 817 | hfi1_clear_ctxt_pkey(dd, uctxt); |
94158442 | 818 | |
77241056 | 819 | uctxt->event_flags = 0; |
42492011 MR |
820 | |
821 | deallocate_ctxt(uctxt); | |
77241056 | 822 | done: |
e0cf75de | 823 | mmdrop(fdata->mm); |
e11ffbd5 | 824 | kobject_put(&dd->kobj); |
acd7c8fe TS |
825 | |
826 | if (atomic_dec_and_test(&dd->user_refcount)) | |
827 | complete(&dd->user_comp); | |
828 | ||
77241056 MM |
829 | kfree(fdata); |
830 | return 0; | |
831 | } | |
832 | ||
833 | /* | |
834 | * Convert kernel *virtual* addresses to physical addresses. | |
835 | * This is used to vmalloc'ed addresses. | |
836 | */ | |
837 | static u64 kvirt_to_phys(void *addr) | |
838 | { | |
839 | struct page *page; | |
840 | u64 paddr = 0; | |
841 | ||
842 | page = vmalloc_to_page(addr); | |
843 | if (page) | |
844 | paddr = page_to_pfn(page) << PAGE_SHIFT; | |
845 | ||
846 | return paddr; | |
847 | } | |
848 | ||
d295dbeb MR |
849 | /** |
850 | * complete_subctxt | |
851 | * @fd: valid filedata pointer | |
852 | * | |
853 | * Sub-context info can only be set up after the base context | |
854 | * has been completed. This is indicated by the clearing of the | |
855 | * HFI1_CTXT_BASE_UINIT bit. | |
856 | * | |
857 | * Wait for the bit to be cleared, and then complete the subcontext | |
858 | * initialization. | |
859 | * | |
860 | */ | |
f2a3bc00 MR |
861 | static int complete_subctxt(struct hfi1_filedata *fd) |
862 | { | |
863 | int ret; | |
d295dbeb | 864 | unsigned long flags; |
f2a3bc00 MR |
865 | |
866 | /* | |
867 | * sub-context info can only be set up after the base context | |
868 | * has been completed. | |
869 | */ | |
870 | ret = wait_event_interruptible( | |
871 | fd->uctxt->wait, | |
872 | !test_bit(HFI1_CTXT_BASE_UNINIT, &fd->uctxt->event_flags)); | |
873 | ||
874 | if (test_bit(HFI1_CTXT_BASE_FAILED, &fd->uctxt->event_flags)) | |
875 | ret = -ENOMEM; | |
876 | ||
d295dbeb | 877 | /* Finish the sub-context init */ |
f2a3bc00 MR |
878 | if (!ret) { |
879 | fd->rec_cpu_num = hfi1_get_proc_affinity(fd->uctxt->numa_id); | |
880 | ret = init_user_ctxt(fd, fd->uctxt); | |
881 | } | |
882 | ||
883 | if (ret) { | |
884 | hfi1_rcd_put(fd->uctxt); | |
885 | fd->uctxt = NULL; | |
d295dbeb | 886 | spin_lock_irqsave(&fd->dd->uctxt_lock, flags); |
f2a3bc00 | 887 | __clear_bit(fd->subctxt, fd->uctxt->in_use_ctxts); |
d295dbeb | 888 | spin_unlock_irqrestore(&fd->dd->uctxt_lock, flags); |
f2a3bc00 MR |
889 | } |
890 | ||
891 | return ret; | |
892 | } | |
893 | ||
5fbded48 | 894 | static int assign_ctxt(struct hfi1_filedata *fd, struct hfi1_user_info *uinfo) |
77241056 | 895 | { |
62239fc6 | 896 | int ret; |
0eb62659 | 897 | unsigned int swmajor, swminor; |
e87473bc | 898 | struct hfi1_ctxtdata *uctxt = NULL; |
77241056 MM |
899 | |
900 | swmajor = uinfo->userversion >> 16; | |
9b60d2cb MR |
901 | if (swmajor != HFI1_USER_SWMAJOR) |
902 | return -ENODEV; | |
77241056 | 903 | |
f2a3bc00 MR |
904 | if (uinfo->subctxt_cnt > HFI1_MAX_SHARED_CTXTS) |
905 | return -EINVAL; | |
906 | ||
77241056 MM |
907 | swminor = uinfo->userversion & 0xffff; |
908 | ||
f2a3bc00 MR |
909 | /* |
910 | * Acquire the mutex to protect against multiple creations of what | |
911 | * could be a shared base context. | |
912 | */ | |
77241056 | 913 | mutex_lock(&hfi1_mutex); |
62239fc6 | 914 | /* |
f2a3bc00 | 915 | * Get a sub context if available (fd->uctxt will be set). |
62239fc6 MR |
916 | * ret < 0 error, 0 no context, 1 sub-context found |
917 | */ | |
f2a3bc00 | 918 | ret = find_sub_ctxt(fd, uinfo); |
77241056 MM |
919 | |
920 | /* | |
f2a3bc00 MR |
921 | * Allocate a base context if context sharing is not required or a |
922 | * sub context wasn't found. | |
77241056 | 923 | */ |
5fbded48 | 924 | if (!ret) |
e87473bc | 925 | ret = allocate_ctxt(fd, fd->dd, uinfo, &uctxt); |
5fbded48 | 926 | |
77241056 | 927 | mutex_unlock(&hfi1_mutex); |
9b60d2cb | 928 | |
d295dbeb | 929 | /* Depending on the context type, finish the appropriate init */ |
f2a3bc00 MR |
930 | switch (ret) { |
931 | case 0: | |
e87473bc | 932 | ret = setup_base_ctxt(fd, uctxt); |
b8f42738 MR |
933 | if (ret) |
934 | deallocate_ctxt(uctxt); | |
f2a3bc00 MR |
935 | break; |
936 | case 1: | |
937 | ret = complete_subctxt(fd); | |
938 | break; | |
939 | default: | |
940 | break; | |
9b60d2cb MR |
941 | } |
942 | ||
77241056 MM |
943 | return ret; |
944 | } | |
945 | ||
d295dbeb MR |
946 | /** |
947 | * match_ctxt | |
948 | * @fd: valid filedata pointer | |
949 | * @uinfo: user info to compare base context with | |
950 | * @uctxt: context to compare uinfo to. | |
951 | * | |
952 | * Compare the given context with the given information to see if it | |
953 | * can be used for a sub context. | |
954 | */ | |
955 | static int match_ctxt(struct hfi1_filedata *fd, | |
956 | const struct hfi1_user_info *uinfo, | |
957 | struct hfi1_ctxtdata *uctxt) | |
958 | { | |
959 | struct hfi1_devdata *dd = fd->dd; | |
960 | unsigned long flags; | |
961 | u16 subctxt; | |
962 | ||
963 | /* Skip dynamically allocated kernel contexts */ | |
964 | if (uctxt->sc && (uctxt->sc->type == SC_KERNEL)) | |
965 | return 0; | |
966 | ||
967 | /* Skip ctxt if it doesn't match the requested one */ | |
968 | if (memcmp(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid)) || | |
969 | uctxt->jkey != generate_jkey(current_uid()) || | |
970 | uctxt->subctxt_id != uinfo->subctxt_id || | |
971 | uctxt->subctxt_cnt != uinfo->subctxt_cnt) | |
972 | return 0; | |
973 | ||
974 | /* Verify the sharing process matches the base */ | |
975 | if (uctxt->userversion != uinfo->userversion) | |
976 | return -EINVAL; | |
977 | ||
978 | /* Find an unused sub context */ | |
979 | spin_lock_irqsave(&dd->uctxt_lock, flags); | |
980 | if (bitmap_empty(uctxt->in_use_ctxts, HFI1_MAX_SHARED_CTXTS)) { | |
981 | /* context is being closed, do not use */ | |
982 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
983 | return 0; | |
984 | } | |
985 | ||
986 | subctxt = find_first_zero_bit(uctxt->in_use_ctxts, | |
987 | HFI1_MAX_SHARED_CTXTS); | |
988 | if (subctxt >= uctxt->subctxt_cnt) { | |
989 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
990 | return -EBUSY; | |
991 | } | |
992 | ||
993 | fd->subctxt = subctxt; | |
994 | __set_bit(fd->subctxt, uctxt->in_use_ctxts); | |
995 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
996 | ||
997 | fd->uctxt = uctxt; | |
998 | hfi1_rcd_get(uctxt); | |
999 | ||
1000 | return 1; | |
1001 | } | |
1002 | ||
1003 | /** | |
1004 | * find_sub_ctxt | |
1005 | * @fd: valid filedata pointer | |
1006 | * @uinfo: matching info to use to find a possible context to share. | |
1007 | * | |
8737ce95 | 1008 | * The hfi1_mutex must be held when this function is called. It is |
f2a3bc00 | 1009 | * necessary to ensure serialized creation of shared contexts. |
d295dbeb MR |
1010 | * |
1011 | * Return: | |
1012 | * 0 No sub-context found | |
1013 | * 1 Subcontext found and allocated | |
1014 | * errno EINVAL (incorrect parameters) | |
1015 | * EBUSY (all sub contexts in use) | |
8737ce95 | 1016 | */ |
9b60d2cb MR |
1017 | static int find_sub_ctxt(struct hfi1_filedata *fd, |
1018 | const struct hfi1_user_info *uinfo) | |
77241056 | 1019 | { |
d295dbeb | 1020 | struct hfi1_ctxtdata *uctxt; |
5fbded48 | 1021 | struct hfi1_devdata *dd = fd->dd; |
d295dbeb MR |
1022 | u16 i; |
1023 | int ret; | |
77241056 | 1024 | |
f2a3bc00 MR |
1025 | if (!uinfo->subctxt_cnt) |
1026 | return 0; | |
1027 | ||
5fbded48 | 1028 | for (i = dd->first_dyn_alloc_ctxt; i < dd->num_rcv_contexts; i++) { |
d295dbeb MR |
1029 | uctxt = hfi1_rcd_get_by_index(dd, i); |
1030 | if (uctxt) { | |
1031 | ret = match_ctxt(fd, uinfo, uctxt); | |
1032 | hfi1_rcd_put(uctxt); | |
1033 | /* value of != 0 will return */ | |
1034 | if (ret) | |
1035 | return ret; | |
1036 | } | |
77241056 MM |
1037 | } |
1038 | ||
5fbded48 | 1039 | return 0; |
77241056 MM |
1040 | } |
1041 | ||
5042cddf | 1042 | static int allocate_ctxt(struct hfi1_filedata *fd, struct hfi1_devdata *dd, |
e87473bc | 1043 | struct hfi1_user_info *uinfo, |
d295dbeb | 1044 | struct hfi1_ctxtdata **rcd) |
77241056 MM |
1045 | { |
1046 | struct hfi1_ctxtdata *uctxt; | |
957558c9 | 1047 | int ret, numa; |
77241056 MM |
1048 | |
1049 | if (dd->flags & HFI1_FROZEN) { | |
1050 | /* | |
1051 | * Pick an error that is unique from all other errors | |
1052 | * that are returned so the user process knows that | |
1053 | * it tried to allocate while the SPC was frozen. It | |
1054 | * it should be able to retry with success in a short | |
1055 | * while. | |
1056 | */ | |
1057 | return -EIO; | |
1058 | } | |
1059 | ||
5fbded48 MR |
1060 | if (!dd->freectxts) |
1061 | return -EBUSY; | |
1062 | ||
b094a36f SS |
1063 | /* |
1064 | * If we don't have a NUMA node requested, preference is towards | |
1065 | * device NUMA node. | |
1066 | */ | |
1067 | fd->rec_cpu_num = hfi1_get_proc_affinity(dd->node); | |
957558c9 MH |
1068 | if (fd->rec_cpu_num != -1) |
1069 | numa = cpu_to_node(fd->rec_cpu_num); | |
1070 | else | |
1071 | numa = numa_node_id(); | |
f2a3bc00 MR |
1072 | ret = hfi1_create_ctxtdata(dd->pport, numa, &uctxt); |
1073 | if (ret < 0) { | |
1074 | dd_dev_err(dd, "user ctxtdata allocation failed\n"); | |
1075 | return ret; | |
77241056 | 1076 | } |
957558c9 MH |
1077 | hfi1_cdbg(PROC, "[%u:%u] pid %u assigned to CPU %d (NUMA %u)", |
1078 | uctxt->ctxt, fd->subctxt, current->pid, fd->rec_cpu_num, | |
1079 | uctxt->numa_id); | |
1080 | ||
77241056 MM |
1081 | /* |
1082 | * Allocate and enable a PIO send context. | |
1083 | */ | |
f2a3bc00 | 1084 | uctxt->sc = sc_alloc(dd, SC_USER, uctxt->rcvhdrqentsize, dd->node); |
3a6982df JP |
1085 | if (!uctxt->sc) { |
1086 | ret = -ENOMEM; | |
1087 | goto ctxdata_free; | |
1088 | } | |
6c63e423 SS |
1089 | hfi1_cdbg(PROC, "allocated send context %u(%u)\n", uctxt->sc->sw_index, |
1090 | uctxt->sc->hw_context); | |
77241056 MM |
1091 | ret = sc_enable(uctxt->sc); |
1092 | if (ret) | |
3a6982df JP |
1093 | goto ctxdata_free; |
1094 | ||
77241056 | 1095 | /* |
f2a3bc00 | 1096 | * Setup sub context information if the user-level has requested |
9b60d2cb | 1097 | * sub contexts. |
77241056 | 1098 | * This has to be done here so the rest of the sub-contexts find the |
f2a3bc00 | 1099 | * proper base context. |
77241056 | 1100 | */ |
f2a3bc00 MR |
1101 | if (uinfo->subctxt_cnt) |
1102 | init_subctxts(uctxt, uinfo); | |
77241056 | 1103 | uctxt->userversion = uinfo->userversion; |
bdf7752e | 1104 | uctxt->flags = hfi1_cap_mask; /* save current flag state */ |
77241056 MM |
1105 | init_waitqueue_head(&uctxt->wait); |
1106 | strlcpy(uctxt->comm, current->comm, sizeof(uctxt->comm)); | |
1107 | memcpy(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid)); | |
1108 | uctxt->jkey = generate_jkey(current_uid()); | |
77241056 | 1109 | hfi1_stats.sps_ctxts++; |
affa48de AD |
1110 | /* |
1111 | * Disable ASPM when there are open user/PSM contexts to avoid | |
1112 | * issues with ASPM L1 exit latency | |
1113 | */ | |
1114 | if (dd->freectxts-- == dd->num_user_contexts) | |
1115 | aspm_disable_all(dd); | |
77241056 | 1116 | |
d295dbeb | 1117 | *rcd = uctxt; |
f683c80c | 1118 | |
77241056 | 1119 | return 0; |
3a6982df JP |
1120 | |
1121 | ctxdata_free: | |
d295dbeb | 1122 | hfi1_free_ctxt(uctxt); |
3a6982df | 1123 | return ret; |
77241056 MM |
1124 | } |
1125 | ||
42492011 MR |
1126 | static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt) |
1127 | { | |
1128 | mutex_lock(&hfi1_mutex); | |
1129 | hfi1_stats.sps_ctxts--; | |
1130 | if (++uctxt->dd->freectxts == uctxt->dd->num_user_contexts) | |
1131 | aspm_enable_all(uctxt->dd); | |
42492011 | 1132 | mutex_unlock(&hfi1_mutex); |
f2a3bc00 | 1133 | |
d295dbeb | 1134 | hfi1_free_ctxt(uctxt); |
42492011 MR |
1135 | } |
1136 | ||
f2a3bc00 MR |
1137 | static void init_subctxts(struct hfi1_ctxtdata *uctxt, |
1138 | const struct hfi1_user_info *uinfo) | |
77241056 | 1139 | { |
77241056 MM |
1140 | uctxt->subctxt_cnt = uinfo->subctxt_cnt; |
1141 | uctxt->subctxt_id = uinfo->subctxt_id; | |
9b60d2cb | 1142 | set_bit(HFI1_CTXT_BASE_UNINIT, &uctxt->event_flags); |
77241056 MM |
1143 | } |
1144 | ||
1145 | static int setup_subctxt(struct hfi1_ctxtdata *uctxt) | |
1146 | { | |
1147 | int ret = 0; | |
8737ce95 | 1148 | u16 num_subctxts = uctxt->subctxt_cnt; |
77241056 MM |
1149 | |
1150 | uctxt->subctxt_uregbase = vmalloc_user(PAGE_SIZE); | |
9b60d2cb MR |
1151 | if (!uctxt->subctxt_uregbase) |
1152 | return -ENOMEM; | |
1153 | ||
77241056 MM |
1154 | /* We can take the size of the RcvHdr Queue from the master */ |
1155 | uctxt->subctxt_rcvhdr_base = vmalloc_user(uctxt->rcvhdrq_size * | |
1156 | num_subctxts); | |
1157 | if (!uctxt->subctxt_rcvhdr_base) { | |
1158 | ret = -ENOMEM; | |
1159 | goto bail_ureg; | |
1160 | } | |
1161 | ||
1162 | uctxt->subctxt_rcvegrbuf = vmalloc_user(uctxt->egrbufs.size * | |
1163 | num_subctxts); | |
1164 | if (!uctxt->subctxt_rcvegrbuf) { | |
1165 | ret = -ENOMEM; | |
1166 | goto bail_rhdr; | |
1167 | } | |
9b60d2cb MR |
1168 | |
1169 | return 0; | |
1170 | ||
77241056 MM |
1171 | bail_rhdr: |
1172 | vfree(uctxt->subctxt_rcvhdr_base); | |
9b60d2cb | 1173 | uctxt->subctxt_rcvhdr_base = NULL; |
77241056 MM |
1174 | bail_ureg: |
1175 | vfree(uctxt->subctxt_uregbase); | |
1176 | uctxt->subctxt_uregbase = NULL; | |
9b60d2cb | 1177 | |
77241056 MM |
1178 | return ret; |
1179 | } | |
1180 | ||
62239fc6 | 1181 | static void user_init(struct hfi1_ctxtdata *uctxt) |
77241056 | 1182 | { |
77241056 | 1183 | unsigned int rcvctrl_ops = 0; |
77241056 MM |
1184 | |
1185 | /* initialize poll variables... */ | |
1186 | uctxt->urgent = 0; | |
1187 | uctxt->urgent_poll = 0; | |
1188 | ||
1189 | /* | |
1190 | * Now enable the ctxt for receive. | |
1191 | * For chips that are set to DMA the tail register to memory | |
1192 | * when they change (and when the update bit transitions from | |
1193 | * 0 to 1. So for those chips, we turn it off and then back on. | |
1194 | * This will (very briefly) affect any other open ctxts, but the | |
1195 | * duration is very short, and therefore isn't an issue. We | |
1196 | * explicitly set the in-memory tail copy to 0 beforehand, so we | |
1197 | * don't have to wait to be sure the DMA update has happened | |
1198 | * (chip resets head/tail to 0 on transition to enable). | |
1199 | */ | |
1200 | if (uctxt->rcvhdrtail_kvaddr) | |
1201 | clear_rcvhdrtail(uctxt); | |
1202 | ||
1203 | /* Setup J_KEY before enabling the context */ | |
17573972 | 1204 | hfi1_set_ctxt_jkey(uctxt->dd, uctxt, uctxt->jkey); |
77241056 MM |
1205 | |
1206 | rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB; | |
bdf7752e | 1207 | if (HFI1_CAP_UGET_MASK(uctxt->flags, HDRSUPP)) |
77241056 MM |
1208 | rcvctrl_ops |= HFI1_RCVCTRL_TIDFLOW_ENB; |
1209 | /* | |
1210 | * Ignore the bit in the flags for now until proper | |
1211 | * support for multiple packet per rcv array entry is | |
1212 | * added. | |
1213 | */ | |
bdf7752e | 1214 | if (!HFI1_CAP_UGET_MASK(uctxt->flags, MULTI_PKT_EGR)) |
77241056 | 1215 | rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB; |
bdf7752e | 1216 | if (HFI1_CAP_UGET_MASK(uctxt->flags, NODROP_EGR_FULL)) |
77241056 | 1217 | rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB; |
bdf7752e | 1218 | if (HFI1_CAP_UGET_MASK(uctxt->flags, NODROP_RHQ_FULL)) |
77241056 | 1219 | rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB; |
566c157c MH |
1220 | /* |
1221 | * The RcvCtxtCtrl.TailUpd bit has to be explicitly written. | |
1222 | * We can't rely on the correct value to be set from prior | |
1223 | * uses of the chip or ctxt. Therefore, add the rcvctrl op | |
1224 | * for both cases. | |
1225 | */ | |
bdf7752e | 1226 | if (HFI1_CAP_UGET_MASK(uctxt->flags, DMA_RTAIL)) |
77241056 | 1227 | rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB; |
566c157c MH |
1228 | else |
1229 | rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_DIS; | |
2250563e | 1230 | hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt); |
77241056 MM |
1231 | } |
1232 | ||
5042cddf MR |
1233 | static int get_ctxt_info(struct hfi1_filedata *fd, void __user *ubase, |
1234 | __u32 len) | |
77241056 MM |
1235 | { |
1236 | struct hfi1_ctxt_info cinfo; | |
9e10af47 | 1237 | struct hfi1_ctxtdata *uctxt = fd->uctxt; |
77241056 MM |
1238 | int ret = 0; |
1239 | ||
ebe6b2e8 | 1240 | memset(&cinfo, 0, sizeof(cinfo)); |
bdf7752e DL |
1241 | cinfo.runtime_flags = (((uctxt->flags >> HFI1_CAP_MISC_SHIFT) & |
1242 | HFI1_CAP_MISC_MASK) << HFI1_CAP_USER_SHIFT) | | |
1243 | HFI1_CAP_UGET_MASK(uctxt->flags, MASK) | | |
1244 | HFI1_CAP_KGET_MASK(uctxt->flags, K2U); | |
622c202c DL |
1245 | /* adjust flag if this fd is not able to cache */ |
1246 | if (!fd->handler) | |
1247 | cinfo.runtime_flags |= HFI1_CAP_TID_UNMAP; /* no caching */ | |
1248 | ||
77241056 MM |
1249 | cinfo.num_active = hfi1_count_active_units(); |
1250 | cinfo.unit = uctxt->dd->unit; | |
1251 | cinfo.ctxt = uctxt->ctxt; | |
9e10af47 | 1252 | cinfo.subctxt = fd->subctxt; |
77241056 MM |
1253 | cinfo.rcvtids = roundup(uctxt->egrbufs.alloced, |
1254 | uctxt->dd->rcv_entries.group_size) + | |
1255 | uctxt->expected_count; | |
1256 | cinfo.credits = uctxt->sc->credits; | |
1257 | cinfo.numa_node = uctxt->numa_id; | |
1258 | cinfo.rec_cpu = fd->rec_cpu_num; | |
1259 | cinfo.send_ctxt = uctxt->sc->hw_context; | |
1260 | ||
1261 | cinfo.egrtids = uctxt->egrbufs.alloced; | |
1262 | cinfo.rcvhdrq_cnt = uctxt->rcvhdrq_cnt; | |
1263 | cinfo.rcvhdrq_entsize = uctxt->rcvhdrqentsize << 2; | |
9e10af47 | 1264 | cinfo.sdma_ring_size = fd->cq->nentries; |
77241056 MM |
1265 | cinfo.rcvegr_size = uctxt->egrbufs.rcvtid_size; |
1266 | ||
9e10af47 | 1267 | trace_hfi1_ctxt_info(uctxt->dd, uctxt->ctxt, fd->subctxt, cinfo); |
77241056 MM |
1268 | if (copy_to_user(ubase, &cinfo, sizeof(cinfo))) |
1269 | ret = -EFAULT; | |
bdf7752e | 1270 | |
77241056 MM |
1271 | return ret; |
1272 | } | |
1273 | ||
e87473bc MR |
1274 | static int init_user_ctxt(struct hfi1_filedata *fd, |
1275 | struct hfi1_ctxtdata *uctxt) | |
9b60d2cb | 1276 | { |
9b60d2cb MR |
1277 | int ret; |
1278 | ||
1279 | ret = hfi1_user_sdma_alloc_queues(uctxt, fd); | |
1280 | if (ret) | |
1281 | return ret; | |
1282 | ||
e87473bc MR |
1283 | ret = hfi1_user_exp_rcv_init(fd, uctxt); |
1284 | if (ret) | |
1285 | hfi1_user_sdma_free_queues(fd, uctxt); | |
9b60d2cb MR |
1286 | |
1287 | return ret; | |
1288 | } | |
1289 | ||
e87473bc MR |
1290 | static int setup_base_ctxt(struct hfi1_filedata *fd, |
1291 | struct hfi1_ctxtdata *uctxt) | |
77241056 | 1292 | { |
77241056 MM |
1293 | struct hfi1_devdata *dd = uctxt->dd; |
1294 | int ret = 0; | |
1295 | ||
9b60d2cb | 1296 | hfi1_init_ctxt(uctxt->sc); |
77241056 | 1297 | |
9b60d2cb MR |
1298 | /* Now allocate the RcvHdr queue and eager buffers. */ |
1299 | ret = hfi1_create_rcvhdrq(dd, uctxt); | |
1300 | if (ret) | |
b8f42738 | 1301 | goto done; |
94158442 | 1302 | |
9b60d2cb | 1303 | ret = hfi1_setup_eagerbufs(uctxt); |
94158442 | 1304 | if (ret) |
b8f42738 | 1305 | goto done; |
9b60d2cb MR |
1306 | |
1307 | /* If sub-contexts are enabled, do the appropriate setup */ | |
1308 | if (uctxt->subctxt_cnt) | |
1309 | ret = setup_subctxt(uctxt); | |
1310 | if (ret) | |
b8f42738 | 1311 | goto done; |
9b60d2cb | 1312 | |
9c1a99c3 | 1313 | ret = hfi1_alloc_ctxt_rcv_groups(uctxt); |
9b60d2cb | 1314 | if (ret) |
b8f42738 | 1315 | goto done; |
9b60d2cb | 1316 | |
e87473bc | 1317 | ret = init_user_ctxt(fd, uctxt); |
77241056 | 1318 | if (ret) |
b8f42738 | 1319 | goto done; |
77241056 | 1320 | |
62239fc6 MR |
1321 | user_init(uctxt); |
1322 | ||
e87473bc MR |
1323 | /* Now that the context is set up, the fd can get a reference. */ |
1324 | fd->uctxt = uctxt; | |
1325 | hfi1_rcd_get(uctxt); | |
1326 | ||
b8f42738 MR |
1327 | done: |
1328 | if (uctxt->subctxt_cnt) { | |
1329 | /* | |
1330 | * On error, set the failed bit so sub-contexts will clean up | |
1331 | * correctly. | |
1332 | */ | |
1333 | if (ret) | |
1334 | set_bit(HFI1_CTXT_BASE_FAILED, &uctxt->event_flags); | |
62239fc6 | 1335 | |
b8f42738 MR |
1336 | /* |
1337 | * Base context is done (successfully or not), notify anybody | |
1338 | * using a sub-context that is waiting for this completion. | |
1339 | */ | |
1340 | clear_bit(HFI1_CTXT_BASE_UNINIT, &uctxt->event_flags); | |
1341 | wake_up(&uctxt->wait); | |
1342 | } | |
d295dbeb | 1343 | |
77241056 MM |
1344 | return ret; |
1345 | } | |
1346 | ||
5042cddf MR |
1347 | static int get_base_info(struct hfi1_filedata *fd, void __user *ubase, |
1348 | __u32 len) | |
77241056 MM |
1349 | { |
1350 | struct hfi1_base_info binfo; | |
9e10af47 | 1351 | struct hfi1_ctxtdata *uctxt = fd->uctxt; |
77241056 MM |
1352 | struct hfi1_devdata *dd = uctxt->dd; |
1353 | ssize_t sz; | |
1354 | unsigned offset; | |
1355 | int ret = 0; | |
1356 | ||
9b60d2cb | 1357 | trace_hfi1_uctxtdata(uctxt->dd, uctxt, fd->subctxt); |
77241056 MM |
1358 | |
1359 | memset(&binfo, 0, sizeof(binfo)); | |
1360 | binfo.hw_version = dd->revision; | |
1361 | binfo.sw_version = HFI1_KERN_SWVERSION; | |
1362 | binfo.bthqp = kdeth_qp; | |
1363 | binfo.jkey = uctxt->jkey; | |
1364 | /* | |
1365 | * If more than 64 contexts are enabled the allocated credit | |
1366 | * return will span two or three contiguous pages. Since we only | |
1367 | * map the page containing the context's credit return address, | |
1368 | * we need to calculate the offset in the proper page. | |
1369 | */ | |
1370 | offset = ((u64)uctxt->sc->hw_free - | |
1371 | (u64)dd->cr_base[uctxt->numa_id].va) % PAGE_SIZE; | |
1372 | binfo.sc_credits_addr = HFI1_MMAP_TOKEN(PIO_CRED, uctxt->ctxt, | |
9e10af47 | 1373 | fd->subctxt, offset); |
77241056 | 1374 | binfo.pio_bufbase = HFI1_MMAP_TOKEN(PIO_BUFS, uctxt->ctxt, |
9e10af47 | 1375 | fd->subctxt, |
77241056 MM |
1376 | uctxt->sc->base_addr); |
1377 | binfo.pio_bufbase_sop = HFI1_MMAP_TOKEN(PIO_BUFS_SOP, | |
1378 | uctxt->ctxt, | |
9e10af47 | 1379 | fd->subctxt, |
77241056 MM |
1380 | uctxt->sc->base_addr); |
1381 | binfo.rcvhdr_bufbase = HFI1_MMAP_TOKEN(RCV_HDRQ, uctxt->ctxt, | |
9e10af47 | 1382 | fd->subctxt, |
77241056 MM |
1383 | uctxt->rcvhdrq); |
1384 | binfo.rcvegr_bufbase = HFI1_MMAP_TOKEN(RCV_EGRBUF, uctxt->ctxt, | |
9e10af47 | 1385 | fd->subctxt, |
60368186 | 1386 | uctxt->egrbufs.rcvtids[0].dma); |
77241056 | 1387 | binfo.sdma_comp_bufbase = HFI1_MMAP_TOKEN(SDMA_COMP, uctxt->ctxt, |
9e10af47 | 1388 | fd->subctxt, 0); |
77241056 MM |
1389 | /* |
1390 | * user regs are at | |
1391 | * (RXE_PER_CONTEXT_USER + (ctxt * RXE_PER_CONTEXT_SIZE)) | |
1392 | */ | |
1393 | binfo.user_regbase = HFI1_MMAP_TOKEN(UREGS, uctxt->ctxt, | |
9e10af47 | 1394 | fd->subctxt, 0); |
2280740f | 1395 | offset = offset_in_page((((uctxt->ctxt - dd->first_dyn_alloc_ctxt) * |
9e10af47 | 1396 | HFI1_MAX_SHARED_CTXTS) + fd->subctxt) * |
e260e404 | 1397 | sizeof(*dd->events)); |
77241056 | 1398 | binfo.events_bufbase = HFI1_MMAP_TOKEN(EVENTS, uctxt->ctxt, |
9e10af47 | 1399 | fd->subctxt, |
77241056 MM |
1400 | offset); |
1401 | binfo.status_bufbase = HFI1_MMAP_TOKEN(STATUS, uctxt->ctxt, | |
9e10af47 | 1402 | fd->subctxt, |
77241056 MM |
1403 | dd->status); |
1404 | if (HFI1_CAP_IS_USET(DMA_RTAIL)) | |
1405 | binfo.rcvhdrtail_base = HFI1_MMAP_TOKEN(RTAIL, uctxt->ctxt, | |
9e10af47 | 1406 | fd->subctxt, 0); |
77241056 MM |
1407 | if (uctxt->subctxt_cnt) { |
1408 | binfo.subctxt_uregbase = HFI1_MMAP_TOKEN(SUBCTXT_UREGS, | |
1409 | uctxt->ctxt, | |
9e10af47 | 1410 | fd->subctxt, 0); |
77241056 MM |
1411 | binfo.subctxt_rcvhdrbuf = HFI1_MMAP_TOKEN(SUBCTXT_RCV_HDRQ, |
1412 | uctxt->ctxt, | |
9e10af47 | 1413 | fd->subctxt, 0); |
77241056 MM |
1414 | binfo.subctxt_rcvegrbuf = HFI1_MMAP_TOKEN(SUBCTXT_EGRBUF, |
1415 | uctxt->ctxt, | |
9e10af47 | 1416 | fd->subctxt, 0); |
77241056 MM |
1417 | } |
1418 | sz = (len < sizeof(binfo)) ? len : sizeof(binfo); | |
1419 | if (copy_to_user(ubase, &binfo, sz)) | |
1420 | ret = -EFAULT; | |
1421 | return ret; | |
1422 | } | |
1423 | ||
1424 | static unsigned int poll_urgent(struct file *fp, | |
1425 | struct poll_table_struct *pt) | |
1426 | { | |
9e10af47 IW |
1427 | struct hfi1_filedata *fd = fp->private_data; |
1428 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1429 | struct hfi1_devdata *dd = uctxt->dd; |
1430 | unsigned pollflag; | |
1431 | ||
1432 | poll_wait(fp, &uctxt->wait, pt); | |
1433 | ||
1434 | spin_lock_irq(&dd->uctxt_lock); | |
1435 | if (uctxt->urgent != uctxt->urgent_poll) { | |
1436 | pollflag = POLLIN | POLLRDNORM; | |
1437 | uctxt->urgent_poll = uctxt->urgent; | |
1438 | } else { | |
1439 | pollflag = 0; | |
1440 | set_bit(HFI1_CTXT_WAITING_URG, &uctxt->event_flags); | |
1441 | } | |
1442 | spin_unlock_irq(&dd->uctxt_lock); | |
1443 | ||
1444 | return pollflag; | |
1445 | } | |
1446 | ||
1447 | static unsigned int poll_next(struct file *fp, | |
1448 | struct poll_table_struct *pt) | |
1449 | { | |
9e10af47 IW |
1450 | struct hfi1_filedata *fd = fp->private_data; |
1451 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 MM |
1452 | struct hfi1_devdata *dd = uctxt->dd; |
1453 | unsigned pollflag; | |
1454 | ||
1455 | poll_wait(fp, &uctxt->wait, pt); | |
1456 | ||
1457 | spin_lock_irq(&dd->uctxt_lock); | |
1458 | if (hdrqempty(uctxt)) { | |
1459 | set_bit(HFI1_CTXT_WAITING_RCV, &uctxt->event_flags); | |
2250563e | 1460 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_ENB, uctxt); |
77241056 | 1461 | pollflag = 0; |
e490974e | 1462 | } else { |
77241056 | 1463 | pollflag = POLLIN | POLLRDNORM; |
e490974e | 1464 | } |
77241056 MM |
1465 | spin_unlock_irq(&dd->uctxt_lock); |
1466 | ||
1467 | return pollflag; | |
1468 | } | |
1469 | ||
1470 | /* | |
1471 | * Find all user contexts in use, and set the specified bit in their | |
1472 | * event mask. | |
1473 | * See also find_ctxt() for a similar use, that is specific to send buffers. | |
1474 | */ | |
1475 | int hfi1_set_uevent_bits(struct hfi1_pportdata *ppd, const int evtbit) | |
1476 | { | |
1477 | struct hfi1_ctxtdata *uctxt; | |
1478 | struct hfi1_devdata *dd = ppd->dd; | |
e6f7622d | 1479 | u16 ctxt; |
77241056 | 1480 | |
d295dbeb MR |
1481 | if (!dd->events) |
1482 | return -EINVAL; | |
77241056 | 1483 | |
2280740f | 1484 | for (ctxt = dd->first_dyn_alloc_ctxt; ctxt < dd->num_rcv_contexts; |
77241056 | 1485 | ctxt++) { |
d295dbeb | 1486 | uctxt = hfi1_rcd_get_by_index(dd, ctxt); |
77241056 MM |
1487 | if (uctxt) { |
1488 | unsigned long *evs = dd->events + | |
2280740f | 1489 | (uctxt->ctxt - dd->first_dyn_alloc_ctxt) * |
77241056 MM |
1490 | HFI1_MAX_SHARED_CTXTS; |
1491 | int i; | |
1492 | /* | |
1493 | * subctxt_cnt is 0 if not shared, so do base | |
1494 | * separately, first, then remaining subctxt, if any | |
1495 | */ | |
1496 | set_bit(evtbit, evs); | |
1497 | for (i = 1; i < uctxt->subctxt_cnt; i++) | |
1498 | set_bit(evtbit, evs + i); | |
d295dbeb | 1499 | hfi1_rcd_put(uctxt); |
77241056 MM |
1500 | } |
1501 | } | |
d295dbeb MR |
1502 | |
1503 | return 0; | |
77241056 MM |
1504 | } |
1505 | ||
1506 | /** | |
1507 | * manage_rcvq - manage a context's receive queue | |
1508 | * @uctxt: the context | |
1509 | * @subctxt: the sub-context | |
1510 | * @start_stop: action to carry out | |
1511 | * | |
1512 | * start_stop == 0 disables receive on the context, for use in queue | |
1513 | * overflow conditions. start_stop==1 re-enables, to be used to | |
1514 | * re-init the software copy of the head register | |
1515 | */ | |
8737ce95 | 1516 | static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt, |
77241056 MM |
1517 | int start_stop) |
1518 | { | |
1519 | struct hfi1_devdata *dd = uctxt->dd; | |
1520 | unsigned int rcvctrl_op; | |
1521 | ||
1522 | if (subctxt) | |
1523 | goto bail; | |
1524 | /* atomically clear receive enable ctxt. */ | |
1525 | if (start_stop) { | |
1526 | /* | |
1527 | * On enable, force in-memory copy of the tail register to | |
1528 | * 0, so that protocol code doesn't have to worry about | |
1529 | * whether or not the chip has yet updated the in-memory | |
1530 | * copy or not on return from the system call. The chip | |
1531 | * always resets it's tail register back to 0 on a | |
1532 | * transition from disabled to enabled. | |
1533 | */ | |
1534 | if (uctxt->rcvhdrtail_kvaddr) | |
1535 | clear_rcvhdrtail(uctxt); | |
1536 | rcvctrl_op = HFI1_RCVCTRL_CTXT_ENB; | |
e490974e | 1537 | } else { |
77241056 | 1538 | rcvctrl_op = HFI1_RCVCTRL_CTXT_DIS; |
e490974e | 1539 | } |
2250563e | 1540 | hfi1_rcvctrl(dd, rcvctrl_op, uctxt); |
77241056 MM |
1541 | /* always; new head should be equal to new tail; see above */ |
1542 | bail: | |
1543 | return 0; | |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * clear the event notifier events for this context. | |
1548 | * User process then performs actions appropriate to bit having been | |
1549 | * set, if desired, and checks again in future. | |
1550 | */ | |
8737ce95 | 1551 | static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt, |
77241056 MM |
1552 | unsigned long events) |
1553 | { | |
1554 | int i; | |
1555 | struct hfi1_devdata *dd = uctxt->dd; | |
1556 | unsigned long *evs; | |
1557 | ||
1558 | if (!dd->events) | |
1559 | return 0; | |
1560 | ||
2280740f | 1561 | evs = dd->events + ((uctxt->ctxt - dd->first_dyn_alloc_ctxt) * |
77241056 MM |
1562 | HFI1_MAX_SHARED_CTXTS) + subctxt; |
1563 | ||
1564 | for (i = 0; i <= _HFI1_MAX_EVENT_BIT; i++) { | |
1565 | if (!test_bit(i, &events)) | |
1566 | continue; | |
1567 | clear_bit(i, evs); | |
1568 | } | |
1569 | return 0; | |
1570 | } | |
1571 | ||
8737ce95 | 1572 | static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, u16 subctxt, u16 pkey) |
77241056 MM |
1573 | { |
1574 | int ret = -ENOENT, i, intable = 0; | |
1575 | struct hfi1_pportdata *ppd = uctxt->ppd; | |
1576 | struct hfi1_devdata *dd = uctxt->dd; | |
1577 | ||
1578 | if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY) { | |
1579 | ret = -EINVAL; | |
1580 | goto done; | |
1581 | } | |
1582 | ||
1583 | for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) | |
1584 | if (pkey == ppd->pkeys[i]) { | |
1585 | intable = 1; | |
1586 | break; | |
1587 | } | |
1588 | ||
1589 | if (intable) | |
17573972 | 1590 | ret = hfi1_set_ctxt_pkey(dd, uctxt, pkey); |
77241056 MM |
1591 | done: |
1592 | return ret; | |
1593 | } | |
1594 | ||
77241056 MM |
1595 | static void user_remove(struct hfi1_devdata *dd) |
1596 | { | |
77241056 MM |
1597 | |
1598 | hfi1_cdev_cleanup(&dd->user_cdev, &dd->user_device); | |
77241056 MM |
1599 | } |
1600 | ||
1601 | static int user_add(struct hfi1_devdata *dd) | |
1602 | { | |
1603 | char name[10]; | |
1604 | int ret; | |
1605 | ||
77241056 | 1606 | snprintf(name, sizeof(name), "%s_%d", class_name(), dd->unit); |
0eb62659 | 1607 | ret = hfi1_cdev_init(dd->unit, name, &hfi1_file_ops, |
e116a64f | 1608 | &dd->user_cdev, &dd->user_device, |
e11ffbd5 | 1609 | true, &dd->kobj); |
77241056 | 1610 | if (ret) |
7312f29d | 1611 | user_remove(dd); |
77241056 | 1612 | |
77241056 MM |
1613 | return ret; |
1614 | } | |
1615 | ||
1616 | /* | |
1617 | * Create per-unit files in /dev | |
1618 | */ | |
1619 | int hfi1_device_create(struct hfi1_devdata *dd) | |
1620 | { | |
0f7b1f91 | 1621 | return user_add(dd); |
77241056 MM |
1622 | } |
1623 | ||
1624 | /* | |
1625 | * Remove per-unit files in /dev | |
1626 | * void, core kernel returns no errors for this stuff | |
1627 | */ | |
1628 | void hfi1_device_remove(struct hfi1_devdata *dd) | |
1629 | { | |
1630 | user_remove(dd); | |
77241056 | 1631 | } |