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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); | |
afc9a42b | 77 | static __poll_t hfi1_poll(struct file *fp, struct poll_table_struct *pt); |
f4cd8765 | 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); |
ddebe981 | 81 | static int assign_ctxt(struct hfi1_filedata *fd, unsigned long arg, u32 len); |
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); |
ff1a5582 | 87 | static int get_ctxt_info(struct hfi1_filedata *fd, unsigned long arg, u32 len); |
45afb324 | 88 | static int get_base_info(struct hfi1_filedata *fd, unsigned long arg, u32 len); |
f404ca4c MR |
89 | static int user_exp_rcv_setup(struct hfi1_filedata *fd, unsigned long arg, |
90 | u32 len); | |
3920eef7 MR |
91 | static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg, |
92 | u32 len); | |
8a41da09 MR |
93 | static int user_exp_rcv_invalid(struct hfi1_filedata *fd, unsigned long arg, |
94 | u32 len); | |
e87473bc MR |
95 | static int setup_base_ctxt(struct hfi1_filedata *fd, |
96 | struct hfi1_ctxtdata *uctxt); | |
f4cd8765 | 97 | static int setup_subctxt(struct hfi1_ctxtdata *uctxt); |
5fbded48 | 98 | |
9b60d2cb MR |
99 | static int find_sub_ctxt(struct hfi1_filedata *fd, |
100 | const struct hfi1_user_info *uinfo); | |
5042cddf | 101 | static int allocate_ctxt(struct hfi1_filedata *fd, struct hfi1_devdata *dd, |
e87473bc MR |
102 | struct hfi1_user_info *uinfo, |
103 | struct hfi1_ctxtdata **cd); | |
42492011 | 104 | static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt); |
afc9a42b AV |
105 | static __poll_t poll_urgent(struct file *fp, struct poll_table_struct *pt); |
106 | static __poll_t poll_next(struct file *fp, struct poll_table_struct *pt); | |
8737ce95 | 107 | static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt, |
88a69b65 MR |
108 | unsigned long arg); |
109 | static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned long arg); | |
ecf79985 | 110 | static int ctxt_reset(struct hfi1_ctxtdata *uctxt); |
8737ce95 | 111 | static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt, |
88a69b65 | 112 | unsigned long arg); |
f4cd8765 | 113 | static int vma_fault(struct vm_fault *vmf); |
8d970cf9 DD |
114 | static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, |
115 | unsigned long arg); | |
77241056 MM |
116 | |
117 | static const struct file_operations hfi1_file_ops = { | |
118 | .owner = THIS_MODULE, | |
77241056 MM |
119 | .write_iter = hfi1_write_iter, |
120 | .open = hfi1_file_open, | |
121 | .release = hfi1_file_close, | |
8d970cf9 | 122 | .unlocked_ioctl = hfi1_file_ioctl, |
77241056 MM |
123 | .poll = hfi1_poll, |
124 | .mmap = hfi1_file_mmap, | |
125 | .llseek = noop_llseek, | |
126 | }; | |
127 | ||
733da3bc | 128 | static const struct vm_operations_struct vm_ops = { |
77241056 MM |
129 | .fault = vma_fault, |
130 | }; | |
131 | ||
132 | /* | |
133 | * Types of memories mapped into user processes' space | |
134 | */ | |
135 | enum mmap_types { | |
136 | PIO_BUFS = 1, | |
137 | PIO_BUFS_SOP, | |
138 | PIO_CRED, | |
139 | RCV_HDRQ, | |
140 | RCV_EGRBUF, | |
141 | UREGS, | |
142 | EVENTS, | |
143 | STATUS, | |
144 | RTAIL, | |
145 | SUBCTXT_UREGS, | |
146 | SUBCTXT_RCV_HDRQ, | |
147 | SUBCTXT_EGRBUF, | |
148 | SDMA_COMP | |
149 | }; | |
150 | ||
151 | /* | |
152 | * Masks and offsets defining the mmap tokens | |
153 | */ | |
154 | #define HFI1_MMAP_OFFSET_MASK 0xfffULL | |
155 | #define HFI1_MMAP_OFFSET_SHIFT 0 | |
156 | #define HFI1_MMAP_SUBCTXT_MASK 0xfULL | |
157 | #define HFI1_MMAP_SUBCTXT_SHIFT 12 | |
158 | #define HFI1_MMAP_CTXT_MASK 0xffULL | |
159 | #define HFI1_MMAP_CTXT_SHIFT 16 | |
160 | #define HFI1_MMAP_TYPE_MASK 0xfULL | |
161 | #define HFI1_MMAP_TYPE_SHIFT 24 | |
162 | #define HFI1_MMAP_MAGIC_MASK 0xffffffffULL | |
163 | #define HFI1_MMAP_MAGIC_SHIFT 32 | |
164 | ||
165 | #define HFI1_MMAP_MAGIC 0xdabbad00 | |
166 | ||
167 | #define HFI1_MMAP_TOKEN_SET(field, val) \ | |
168 | (((val) & HFI1_MMAP_##field##_MASK) << HFI1_MMAP_##field##_SHIFT) | |
169 | #define HFI1_MMAP_TOKEN_GET(field, token) \ | |
170 | (((token) >> HFI1_MMAP_##field##_SHIFT) & HFI1_MMAP_##field##_MASK) | |
171 | #define HFI1_MMAP_TOKEN(type, ctxt, subctxt, addr) \ | |
172 | (HFI1_MMAP_TOKEN_SET(MAGIC, HFI1_MMAP_MAGIC) | \ | |
173 | HFI1_MMAP_TOKEN_SET(TYPE, type) | \ | |
174 | HFI1_MMAP_TOKEN_SET(CTXT, ctxt) | \ | |
175 | HFI1_MMAP_TOKEN_SET(SUBCTXT, subctxt) | \ | |
e260e404 | 176 | HFI1_MMAP_TOKEN_SET(OFFSET, (offset_in_page(addr)))) |
77241056 | 177 | |
77241056 MM |
178 | #define dbg(fmt, ...) \ |
179 | pr_info(fmt, ##__VA_ARGS__) | |
180 | ||
77241056 MM |
181 | static inline int is_valid_mmap(u64 token) |
182 | { | |
183 | return (HFI1_MMAP_TOKEN_GET(MAGIC, token) == HFI1_MMAP_MAGIC); | |
184 | } | |
185 | ||
186 | static int hfi1_file_open(struct inode *inode, struct file *fp) | |
187 | { | |
ea3a0ee5 | 188 | struct hfi1_filedata *fd; |
e11ffbd5 DD |
189 | struct hfi1_devdata *dd = container_of(inode->i_cdev, |
190 | struct hfi1_devdata, | |
191 | user_cdev); | |
192 | ||
cb51c5d2 | 193 | if (!((dd->flags & HFI1_PRESENT) && dd->kregbase1)) |
5fbded48 MR |
194 | return -EINVAL; |
195 | ||
acd7c8fe TS |
196 | if (!atomic_inc_not_zero(&dd->user_refcount)) |
197 | return -ENXIO; | |
198 | ||
e11ffbd5 DD |
199 | /* Just take a ref now. Not all opens result in a context assign */ |
200 | kobject_get(&dd->kobj); | |
201 | ||
77241056 | 202 | /* The real work is performed later in assign_ctxt() */ |
ea3a0ee5 IW |
203 | |
204 | fd = kzalloc(sizeof(*fd), GFP_KERNEL); | |
205 | ||
3faa3d9a IW |
206 | if (fd) { |
207 | fd->rec_cpu_num = -1; /* no cpu affinity by default */ | |
208 | fd->mm = current->mm; | |
f1f10076 | 209 | mmgrab(fd->mm); |
5fbded48 | 210 | fd->dd = dd; |
acd7c8fe TS |
211 | fp->private_data = fd; |
212 | } else { | |
213 | fp->private_data = NULL; | |
214 | ||
215 | if (atomic_dec_and_test(&dd->user_refcount)) | |
216 | complete(&dd->user_comp); | |
ea3a0ee5 | 217 | |
acd7c8fe TS |
218 | return -ENOMEM; |
219 | } | |
ea3a0ee5 | 220 | |
acd7c8fe | 221 | return 0; |
77241056 MM |
222 | } |
223 | ||
8d970cf9 DD |
224 | static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, |
225 | unsigned long arg) | |
226 | { | |
227 | struct hfi1_filedata *fd = fp->private_data; | |
228 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
8d970cf9 | 229 | int ret = 0; |
8d970cf9 | 230 | int uval = 0; |
8d970cf9 | 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: | |
ddebe981 | 240 | ret = assign_ctxt(fd, arg, _IOC_SIZE(cmd)); |
8d970cf9 | 241 | break; |
ddebe981 | 242 | |
8d970cf9 | 243 | case HFI1_IOCTL_CTXT_INFO: |
ff1a5582 | 244 | ret = get_ctxt_info(fd, arg, _IOC_SIZE(cmd)); |
8d970cf9 | 245 | break; |
ff1a5582 | 246 | |
8d970cf9 | 247 | case HFI1_IOCTL_USER_INFO: |
45afb324 | 248 | ret = get_base_info(fd, arg, _IOC_SIZE(cmd)); |
8d970cf9 | 249 | break; |
45afb324 | 250 | |
8d970cf9 | 251 | case HFI1_IOCTL_CREDIT_UPD: |
f7ca535b | 252 | if (uctxt) |
8d970cf9 DD |
253 | sc_return_credits(uctxt->sc); |
254 | break; | |
255 | ||
256 | case HFI1_IOCTL_TID_UPDATE: | |
f404ca4c | 257 | ret = user_exp_rcv_setup(fd, arg, _IOC_SIZE(cmd)); |
8d970cf9 DD |
258 | break; |
259 | ||
260 | case HFI1_IOCTL_TID_FREE: | |
3920eef7 | 261 | ret = user_exp_rcv_clear(fd, arg, _IOC_SIZE(cmd)); |
8d970cf9 DD |
262 | break; |
263 | ||
264 | case HFI1_IOCTL_TID_INVAL_READ: | |
8a41da09 | 265 | ret = user_exp_rcv_invalid(fd, arg, _IOC_SIZE(cmd)); |
8d970cf9 DD |
266 | break; |
267 | ||
268 | case HFI1_IOCTL_RECV_CTRL: | |
88a69b65 | 269 | ret = manage_rcvq(uctxt, fd->subctxt, arg); |
8d970cf9 DD |
270 | break; |
271 | ||
272 | case HFI1_IOCTL_POLL_TYPE: | |
88a69b65 | 273 | if (get_user(uval, (int __user *)arg)) |
8d970cf9 DD |
274 | return -EFAULT; |
275 | uctxt->poll_type = (typeof(uctxt->poll_type))uval; | |
276 | break; | |
277 | ||
278 | case HFI1_IOCTL_ACK_EVENT: | |
88a69b65 | 279 | ret = user_event_ack(uctxt, fd->subctxt, arg); |
8d970cf9 DD |
280 | break; |
281 | ||
282 | case HFI1_IOCTL_SET_PKEY: | |
88a69b65 | 283 | ret = set_ctxt_pkey(uctxt, arg); |
8d970cf9 DD |
284 | break; |
285 | ||
ecf79985 MR |
286 | case HFI1_IOCTL_CTXT_RESET: |
287 | ret = ctxt_reset(uctxt); | |
8d970cf9 | 288 | break; |
8d970cf9 DD |
289 | |
290 | case HFI1_IOCTL_GET_VERS: | |
291 | uval = HFI1_USER_SWVERSION; | |
292 | if (put_user(uval, (int __user *)arg)) | |
293 | return -EFAULT; | |
294 | break; | |
295 | ||
296 | default: | |
297 | return -EINVAL; | |
298 | } | |
299 | ||
300 | return ret; | |
301 | } | |
302 | ||
77241056 MM |
303 | static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from) |
304 | { | |
9e10af47 IW |
305 | struct hfi1_filedata *fd = kiocb->ki_filp->private_data; |
306 | struct hfi1_user_sdma_pkt_q *pq = fd->pq; | |
307 | struct hfi1_user_sdma_comp_q *cq = fd->cq; | |
0904f327 | 308 | int done = 0, reqs = 0; |
77241056 MM |
309 | unsigned long dim = from->nr_segs; |
310 | ||
0904f327 IW |
311 | if (!cq || !pq) |
312 | return -EIO; | |
77241056 | 313 | |
0904f327 IW |
314 | if (!iter_is_iovec(from) || !dim) |
315 | return -EINVAL; | |
77241056 | 316 | |
34ab4de7 | 317 | trace_hfi1_sdma_request(fd->dd, fd->uctxt->ctxt, fd->subctxt, dim); |
77241056 | 318 | |
0904f327 IW |
319 | if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) |
320 | return -ENOSPC; | |
77241056 MM |
321 | |
322 | while (dim) { | |
0904f327 | 323 | int ret; |
77241056 MM |
324 | unsigned long count = 0; |
325 | ||
326 | ret = hfi1_user_sdma_process_request( | |
5042cddf | 327 | fd, (struct iovec *)(from->iov + done), |
77241056 | 328 | dim, &count); |
0904f327 IW |
329 | if (ret) { |
330 | reqs = ret; | |
331 | break; | |
332 | } | |
77241056 MM |
333 | dim -= count; |
334 | done += count; | |
335 | reqs++; | |
336 | } | |
0904f327 IW |
337 | |
338 | return reqs; | |
77241056 MM |
339 | } |
340 | ||
341 | static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma) | |
342 | { | |
9e10af47 IW |
343 | struct hfi1_filedata *fd = fp->private_data; |
344 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 | 345 | struct hfi1_devdata *dd; |
60368186 | 346 | unsigned long flags; |
77241056 MM |
347 | u64 token = vma->vm_pgoff << PAGE_SHIFT, |
348 | memaddr = 0; | |
60368186 | 349 | void *memvirt = NULL; |
77241056 MM |
350 | u8 subctxt, mapio = 0, vmf = 0, type; |
351 | ssize_t memlen = 0; | |
352 | int ret = 0; | |
353 | u16 ctxt; | |
354 | ||
77241056 MM |
355 | if (!is_valid_mmap(token) || !uctxt || |
356 | !(vma->vm_flags & VM_SHARED)) { | |
357 | ret = -EINVAL; | |
358 | goto done; | |
359 | } | |
360 | dd = uctxt->dd; | |
361 | ctxt = HFI1_MMAP_TOKEN_GET(CTXT, token); | |
362 | subctxt = HFI1_MMAP_TOKEN_GET(SUBCTXT, token); | |
363 | type = HFI1_MMAP_TOKEN_GET(TYPE, token); | |
9e10af47 | 364 | if (ctxt != uctxt->ctxt || subctxt != fd->subctxt) { |
77241056 MM |
365 | ret = -EINVAL; |
366 | goto done; | |
367 | } | |
368 | ||
369 | flags = vma->vm_flags; | |
370 | ||
371 | switch (type) { | |
372 | case PIO_BUFS: | |
373 | case PIO_BUFS_SOP: | |
374 | memaddr = ((dd->physaddr + TXE_PIO_SEND) + | |
375 | /* chip pio base */ | |
d32cf44a | 376 | (uctxt->sc->hw_context * BIT(16))) + |
77241056 MM |
377 | /* 64K PIO space / ctxt */ |
378 | (type == PIO_BUFS_SOP ? | |
379 | (TXE_PIO_SIZE / 2) : 0); /* sop? */ | |
380 | /* | |
381 | * Map only the amount allocated to the context, not the | |
382 | * entire available context's PIO space. | |
383 | */ | |
437b29d1 | 384 | memlen = PAGE_ALIGN(uctxt->sc->credits * PIO_BLOCK_SIZE); |
77241056 MM |
385 | flags &= ~VM_MAYREAD; |
386 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
387 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
388 | mapio = 1; | |
389 | break; | |
390 | case PIO_CRED: | |
391 | if (flags & VM_WRITE) { | |
392 | ret = -EPERM; | |
393 | goto done; | |
394 | } | |
395 | /* | |
396 | * The credit return location for this context could be on the | |
397 | * second or third page allocated for credit returns (if number | |
398 | * of enabled contexts > 64 and 128 respectively). | |
399 | */ | |
60368186 TK |
400 | memvirt = dd->cr_base[uctxt->numa_id].va; |
401 | memaddr = virt_to_phys(memvirt) + | |
77241056 MM |
402 | (((u64)uctxt->sc->hw_free - |
403 | (u64)dd->cr_base[uctxt->numa_id].va) & PAGE_MASK); | |
404 | memlen = PAGE_SIZE; | |
405 | flags &= ~VM_MAYWRITE; | |
406 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
407 | /* | |
408 | * The driver has already allocated memory for credit | |
409 | * returns and programmed it into the chip. Has that | |
410 | * memory been flagged as non-cached? | |
411 | */ | |
412 | /* vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); */ | |
413 | mapio = 1; | |
414 | break; | |
415 | case RCV_HDRQ: | |
77241056 | 416 | memlen = uctxt->rcvhdrq_size; |
60368186 | 417 | memvirt = uctxt->rcvhdrq; |
77241056 MM |
418 | break; |
419 | case RCV_EGRBUF: { | |
420 | unsigned long addr; | |
421 | int i; | |
422 | /* | |
423 | * The RcvEgr buffer need to be handled differently | |
424 | * as multiple non-contiguous pages need to be mapped | |
425 | * into the user process. | |
426 | */ | |
427 | memlen = uctxt->egrbufs.size; | |
428 | if ((vma->vm_end - vma->vm_start) != memlen) { | |
429 | dd_dev_err(dd, "Eager buffer map size invalid (%lu != %lu)\n", | |
430 | (vma->vm_end - vma->vm_start), memlen); | |
431 | ret = -EINVAL; | |
432 | goto done; | |
433 | } | |
434 | if (vma->vm_flags & VM_WRITE) { | |
435 | ret = -EPERM; | |
436 | goto done; | |
437 | } | |
438 | vma->vm_flags &= ~VM_MAYWRITE; | |
439 | addr = vma->vm_start; | |
440 | for (i = 0 ; i < uctxt->egrbufs.numbufs; i++) { | |
60368186 TK |
441 | memlen = uctxt->egrbufs.buffers[i].len; |
442 | memvirt = uctxt->egrbufs.buffers[i].addr; | |
77241056 MM |
443 | ret = remap_pfn_range( |
444 | vma, addr, | |
60368186 TK |
445 | /* |
446 | * virt_to_pfn() does the same, but | |
447 | * it's not available on x86_64 | |
448 | * when CONFIG_MMU is enabled. | |
449 | */ | |
450 | PFN_DOWN(__pa(memvirt)), | |
451 | memlen, | |
77241056 MM |
452 | vma->vm_page_prot); |
453 | if (ret < 0) | |
454 | goto done; | |
60368186 | 455 | addr += memlen; |
77241056 MM |
456 | } |
457 | ret = 0; | |
458 | goto done; | |
459 | } | |
460 | case UREGS: | |
461 | /* | |
462 | * Map only the page that contains this context's user | |
463 | * registers. | |
464 | */ | |
465 | memaddr = (unsigned long) | |
466 | (dd->physaddr + RXE_PER_CONTEXT_USER) | |
467 | + (uctxt->ctxt * RXE_PER_CONTEXT_SIZE); | |
468 | /* | |
469 | * TidFlow table is on the same page as the rest of the | |
470 | * user registers. | |
471 | */ | |
472 | memlen = PAGE_SIZE; | |
473 | flags |= VM_DONTCOPY | VM_DONTEXPAND; | |
474 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
475 | mapio = 1; | |
476 | break; | |
477 | case EVENTS: | |
478 | /* | |
479 | * Use the page where this context's flags are. User level | |
480 | * knows where it's own bitmap is within the page. | |
481 | */ | |
21e5acc0 MR |
482 | memaddr = (unsigned long) |
483 | (dd->events + uctxt_offset(uctxt)) & PAGE_MASK; | |
77241056 MM |
484 | memlen = PAGE_SIZE; |
485 | /* | |
486 | * v3.7 removes VM_RESERVED but the effect is kept by | |
487 | * using VM_IO. | |
488 | */ | |
489 | flags |= VM_IO | VM_DONTEXPAND; | |
490 | vmf = 1; | |
491 | break; | |
492 | case STATUS: | |
12220267 IW |
493 | if (flags & (unsigned long)(VM_WRITE | VM_EXEC)) { |
494 | ret = -EPERM; | |
495 | goto done; | |
496 | } | |
77241056 MM |
497 | memaddr = kvirt_to_phys((void *)dd->status); |
498 | memlen = PAGE_SIZE; | |
499 | flags |= VM_IO | VM_DONTEXPAND; | |
500 | break; | |
501 | case RTAIL: | |
502 | if (!HFI1_CAP_IS_USET(DMA_RTAIL)) { | |
503 | /* | |
504 | * If the memory allocation failed, the context alloc | |
505 | * also would have failed, so we would never get here | |
506 | */ | |
507 | ret = -EINVAL; | |
508 | goto done; | |
509 | } | |
510 | if (flags & VM_WRITE) { | |
511 | ret = -EPERM; | |
512 | goto done; | |
513 | } | |
77241056 | 514 | memlen = PAGE_SIZE; |
60368186 | 515 | memvirt = (void *)uctxt->rcvhdrtail_kvaddr; |
77241056 MM |
516 | flags &= ~VM_MAYWRITE; |
517 | break; | |
518 | case SUBCTXT_UREGS: | |
519 | memaddr = (u64)uctxt->subctxt_uregbase; | |
520 | memlen = PAGE_SIZE; | |
521 | flags |= VM_IO | VM_DONTEXPAND; | |
522 | vmf = 1; | |
523 | break; | |
524 | case SUBCTXT_RCV_HDRQ: | |
525 | memaddr = (u64)uctxt->subctxt_rcvhdr_base; | |
526 | memlen = uctxt->rcvhdrq_size * uctxt->subctxt_cnt; | |
527 | flags |= VM_IO | VM_DONTEXPAND; | |
528 | vmf = 1; | |
529 | break; | |
530 | case SUBCTXT_EGRBUF: | |
531 | memaddr = (u64)uctxt->subctxt_rcvegrbuf; | |
532 | memlen = uctxt->egrbufs.size * uctxt->subctxt_cnt; | |
533 | flags |= VM_IO | VM_DONTEXPAND; | |
534 | flags &= ~VM_MAYWRITE; | |
535 | vmf = 1; | |
536 | break; | |
537 | case SDMA_COMP: { | |
9e10af47 | 538 | struct hfi1_user_sdma_comp_q *cq = fd->cq; |
77241056 | 539 | |
9e10af47 | 540 | if (!cq) { |
77241056 MM |
541 | ret = -EFAULT; |
542 | goto done; | |
543 | } | |
77241056 | 544 | memaddr = (u64)cq->comps; |
437b29d1 | 545 | memlen = PAGE_ALIGN(sizeof(*cq->comps) * cq->nentries); |
77241056 MM |
546 | flags |= VM_IO | VM_DONTEXPAND; |
547 | vmf = 1; | |
548 | break; | |
549 | } | |
550 | default: | |
551 | ret = -EINVAL; | |
552 | break; | |
553 | } | |
554 | ||
555 | if ((vma->vm_end - vma->vm_start) != memlen) { | |
556 | hfi1_cdbg(PROC, "%u:%u Memory size mismatch %lu:%lu", | |
9e10af47 | 557 | uctxt->ctxt, fd->subctxt, |
77241056 MM |
558 | (vma->vm_end - vma->vm_start), memlen); |
559 | ret = -EINVAL; | |
560 | goto done; | |
561 | } | |
562 | ||
563 | vma->vm_flags = flags; | |
6c63e423 SS |
564 | hfi1_cdbg(PROC, |
565 | "%u:%u type:%u io/vf:%d/%d, addr:0x%llx, len:%lu(%lu), flags:0x%lx\n", | |
566 | ctxt, subctxt, type, mapio, vmf, memaddr, memlen, | |
77241056 | 567 | vma->vm_end - vma->vm_start, vma->vm_flags); |
77241056 | 568 | if (vmf) { |
60368186 | 569 | vma->vm_pgoff = PFN_DOWN(memaddr); |
77241056 MM |
570 | vma->vm_ops = &vm_ops; |
571 | ret = 0; | |
572 | } else if (mapio) { | |
60368186 TK |
573 | ret = io_remap_pfn_range(vma, vma->vm_start, |
574 | PFN_DOWN(memaddr), | |
575 | memlen, | |
77241056 | 576 | vma->vm_page_prot); |
60368186 TK |
577 | } else if (memvirt) { |
578 | ret = remap_pfn_range(vma, vma->vm_start, | |
579 | PFN_DOWN(__pa(memvirt)), | |
580 | memlen, | |
581 | vma->vm_page_prot); | |
77241056 | 582 | } else { |
60368186 TK |
583 | ret = remap_pfn_range(vma, vma->vm_start, |
584 | PFN_DOWN(memaddr), | |
585 | memlen, | |
77241056 MM |
586 | vma->vm_page_prot); |
587 | } | |
588 | done: | |
589 | return ret; | |
590 | } | |
591 | ||
592 | /* | |
593 | * Local (non-chip) user memory is not mapped right away but as it is | |
594 | * accessed by the user-level code. | |
595 | */ | |
11bac800 | 596 | static int vma_fault(struct vm_fault *vmf) |
77241056 MM |
597 | { |
598 | struct page *page; | |
599 | ||
600 | page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT)); | |
601 | if (!page) | |
602 | return VM_FAULT_SIGBUS; | |
603 | ||
604 | get_page(page); | |
605 | vmf->page = page; | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
afc9a42b | 610 | static __poll_t hfi1_poll(struct file *fp, struct poll_table_struct *pt) |
77241056 MM |
611 | { |
612 | struct hfi1_ctxtdata *uctxt; | |
afc9a42b | 613 | __poll_t pollflag; |
77241056 | 614 | |
9e10af47 | 615 | uctxt = ((struct hfi1_filedata *)fp->private_data)->uctxt; |
77241056 MM |
616 | if (!uctxt) |
617 | pollflag = POLLERR; | |
618 | else if (uctxt->poll_type == HFI1_POLL_TYPE_URGENT) | |
619 | pollflag = poll_urgent(fp, pt); | |
620 | else if (uctxt->poll_type == HFI1_POLL_TYPE_ANYRCV) | |
621 | pollflag = poll_next(fp, pt); | |
622 | else /* invalid */ | |
623 | pollflag = POLLERR; | |
624 | ||
625 | return pollflag; | |
626 | } | |
627 | ||
628 | static int hfi1_file_close(struct inode *inode, struct file *fp) | |
629 | { | |
630 | struct hfi1_filedata *fdata = fp->private_data; | |
631 | struct hfi1_ctxtdata *uctxt = fdata->uctxt; | |
e11ffbd5 DD |
632 | struct hfi1_devdata *dd = container_of(inode->i_cdev, |
633 | struct hfi1_devdata, | |
634 | user_cdev); | |
77241056 MM |
635 | unsigned long flags, *ev; |
636 | ||
637 | fp->private_data = NULL; | |
638 | ||
639 | if (!uctxt) | |
640 | goto done; | |
641 | ||
d295dbeb | 642 | hfi1_cdbg(PROC, "closing ctxt %u:%u", uctxt->ctxt, fdata->subctxt); |
77241056 MM |
643 | |
644 | flush_wc(); | |
645 | /* drain user sdma queue */ | |
e87473bc | 646 | hfi1_user_sdma_free_queues(fdata, uctxt); |
77241056 | 647 | |
957558c9 | 648 | /* release the cpu */ |
b094a36f | 649 | hfi1_put_proc_affinity(fdata->rec_cpu_num); |
957558c9 | 650 | |
224d71f9 MR |
651 | /* clean up rcv side */ |
652 | hfi1_user_exp_rcv_free(fdata); | |
653 | ||
d295dbeb MR |
654 | /* |
655 | * fdata->uctxt is used in the above cleanup. It is not ready to be | |
656 | * removed until here. | |
657 | */ | |
658 | fdata->uctxt = NULL; | |
659 | hfi1_rcd_put(uctxt); | |
660 | ||
77241056 MM |
661 | /* |
662 | * Clear any left over, unhandled events so the next process that | |
663 | * gets this context doesn't get confused. | |
664 | */ | |
21e5acc0 | 665 | ev = dd->events + uctxt_offset(uctxt) + fdata->subctxt; |
77241056 MM |
666 | *ev = 0; |
667 | ||
d295dbeb | 668 | spin_lock_irqsave(&dd->uctxt_lock, flags); |
8737ce95 MR |
669 | __clear_bit(fdata->subctxt, uctxt->in_use_ctxts); |
670 | if (!bitmap_empty(uctxt->in_use_ctxts, HFI1_MAX_SHARED_CTXTS)) { | |
d295dbeb | 671 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); |
77241056 MM |
672 | goto done; |
673 | } | |
d295dbeb | 674 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); |
77241056 | 675 | |
77241056 MM |
676 | /* |
677 | * Disable receive context and interrupt available, reset all | |
678 | * RcvCtxtCtrl bits to default values. | |
679 | */ | |
680 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS | | |
681 | HFI1_RCVCTRL_TIDFLOW_DIS | | |
682 | HFI1_RCVCTRL_INTRAVAIL_DIS | | |
566c157c | 683 | HFI1_RCVCTRL_TAILUPD_DIS | |
77241056 MM |
684 | HFI1_RCVCTRL_ONE_PKT_EGR_DIS | |
685 | HFI1_RCVCTRL_NO_RHQ_DROP_DIS | | |
2250563e | 686 | HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt); |
77241056 | 687 | /* Clear the context's J_KEY */ |
17573972 | 688 | hfi1_clear_ctxt_jkey(dd, uctxt); |
77241056 | 689 | /* |
f683c80c MR |
690 | * If a send context is allocated, reset context integrity |
691 | * checks to default and disable the send context. | |
77241056 | 692 | */ |
f683c80c MR |
693 | if (uctxt->sc) { |
694 | set_pio_integrity(uctxt->sc); | |
695 | sc_disable(uctxt->sc); | |
696 | } | |
77241056 | 697 | |
9c1a99c3 | 698 | hfi1_free_ctxt_rcv_groups(uctxt); |
637a9a7f | 699 | hfi1_clear_ctxt_pkey(dd, uctxt); |
94158442 | 700 | |
77241056 | 701 | uctxt->event_flags = 0; |
42492011 MR |
702 | |
703 | deallocate_ctxt(uctxt); | |
77241056 | 704 | done: |
e0cf75de | 705 | mmdrop(fdata->mm); |
e11ffbd5 | 706 | kobject_put(&dd->kobj); |
acd7c8fe TS |
707 | |
708 | if (atomic_dec_and_test(&dd->user_refcount)) | |
709 | complete(&dd->user_comp); | |
710 | ||
77241056 MM |
711 | kfree(fdata); |
712 | return 0; | |
713 | } | |
714 | ||
715 | /* | |
716 | * Convert kernel *virtual* addresses to physical addresses. | |
717 | * This is used to vmalloc'ed addresses. | |
718 | */ | |
719 | static u64 kvirt_to_phys(void *addr) | |
720 | { | |
721 | struct page *page; | |
722 | u64 paddr = 0; | |
723 | ||
724 | page = vmalloc_to_page(addr); | |
725 | if (page) | |
726 | paddr = page_to_pfn(page) << PAGE_SHIFT; | |
727 | ||
728 | return paddr; | |
729 | } | |
730 | ||
d295dbeb MR |
731 | /** |
732 | * complete_subctxt | |
733 | * @fd: valid filedata pointer | |
734 | * | |
735 | * Sub-context info can only be set up after the base context | |
736 | * has been completed. This is indicated by the clearing of the | |
737 | * HFI1_CTXT_BASE_UINIT bit. | |
738 | * | |
739 | * Wait for the bit to be cleared, and then complete the subcontext | |
740 | * initialization. | |
741 | * | |
742 | */ | |
f2a3bc00 MR |
743 | static int complete_subctxt(struct hfi1_filedata *fd) |
744 | { | |
745 | int ret; | |
d295dbeb | 746 | unsigned long flags; |
f2a3bc00 MR |
747 | |
748 | /* | |
749 | * sub-context info can only be set up after the base context | |
750 | * has been completed. | |
751 | */ | |
752 | ret = wait_event_interruptible( | |
753 | fd->uctxt->wait, | |
754 | !test_bit(HFI1_CTXT_BASE_UNINIT, &fd->uctxt->event_flags)); | |
755 | ||
756 | if (test_bit(HFI1_CTXT_BASE_FAILED, &fd->uctxt->event_flags)) | |
757 | ret = -ENOMEM; | |
758 | ||
d295dbeb | 759 | /* Finish the sub-context init */ |
f2a3bc00 MR |
760 | if (!ret) { |
761 | fd->rec_cpu_num = hfi1_get_proc_affinity(fd->uctxt->numa_id); | |
762 | ret = init_user_ctxt(fd, fd->uctxt); | |
763 | } | |
764 | ||
765 | if (ret) { | |
d295dbeb | 766 | spin_lock_irqsave(&fd->dd->uctxt_lock, flags); |
f2a3bc00 | 767 | __clear_bit(fd->subctxt, fd->uctxt->in_use_ctxts); |
d295dbeb | 768 | spin_unlock_irqrestore(&fd->dd->uctxt_lock, flags); |
57194fa7 DC |
769 | hfi1_rcd_put(fd->uctxt); |
770 | fd->uctxt = NULL; | |
f2a3bc00 MR |
771 | } |
772 | ||
773 | return ret; | |
774 | } | |
775 | ||
ddebe981 | 776 | static int assign_ctxt(struct hfi1_filedata *fd, unsigned long arg, u32 len) |
77241056 | 777 | { |
62239fc6 | 778 | int ret; |
6d945a84 | 779 | unsigned int swmajor; |
e87473bc | 780 | struct hfi1_ctxtdata *uctxt = NULL; |
ddebe981 MR |
781 | struct hfi1_user_info uinfo; |
782 | ||
783 | if (fd->uctxt) | |
784 | return -EINVAL; | |
785 | ||
786 | if (sizeof(uinfo) != len) | |
787 | return -EINVAL; | |
77241056 | 788 | |
ddebe981 MR |
789 | if (copy_from_user(&uinfo, (void __user *)arg, sizeof(uinfo))) |
790 | return -EFAULT; | |
77241056 | 791 | |
ddebe981 | 792 | swmajor = uinfo.userversion >> 16; |
9b60d2cb MR |
793 | if (swmajor != HFI1_USER_SWMAJOR) |
794 | return -ENODEV; | |
77241056 | 795 | |
ddebe981 | 796 | if (uinfo.subctxt_cnt > HFI1_MAX_SHARED_CTXTS) |
f2a3bc00 MR |
797 | return -EINVAL; |
798 | ||
f2a3bc00 MR |
799 | /* |
800 | * Acquire the mutex to protect against multiple creations of what | |
801 | * could be a shared base context. | |
802 | */ | |
77241056 | 803 | mutex_lock(&hfi1_mutex); |
62239fc6 | 804 | /* |
f2a3bc00 | 805 | * Get a sub context if available (fd->uctxt will be set). |
62239fc6 MR |
806 | * ret < 0 error, 0 no context, 1 sub-context found |
807 | */ | |
ddebe981 | 808 | ret = find_sub_ctxt(fd, &uinfo); |
77241056 MM |
809 | |
810 | /* | |
f2a3bc00 MR |
811 | * Allocate a base context if context sharing is not required or a |
812 | * sub context wasn't found. | |
77241056 | 813 | */ |
5fbded48 | 814 | if (!ret) |
ddebe981 | 815 | ret = allocate_ctxt(fd, fd->dd, &uinfo, &uctxt); |
5fbded48 | 816 | |
77241056 | 817 | mutex_unlock(&hfi1_mutex); |
9b60d2cb | 818 | |
d295dbeb | 819 | /* Depending on the context type, finish the appropriate init */ |
f2a3bc00 MR |
820 | switch (ret) { |
821 | case 0: | |
e87473bc | 822 | ret = setup_base_ctxt(fd, uctxt); |
b8f42738 MR |
823 | if (ret) |
824 | deallocate_ctxt(uctxt); | |
f2a3bc00 MR |
825 | break; |
826 | case 1: | |
827 | ret = complete_subctxt(fd); | |
828 | break; | |
829 | default: | |
830 | break; | |
9b60d2cb MR |
831 | } |
832 | ||
77241056 MM |
833 | return ret; |
834 | } | |
835 | ||
d295dbeb MR |
836 | /** |
837 | * match_ctxt | |
838 | * @fd: valid filedata pointer | |
839 | * @uinfo: user info to compare base context with | |
840 | * @uctxt: context to compare uinfo to. | |
841 | * | |
842 | * Compare the given context with the given information to see if it | |
843 | * can be used for a sub context. | |
844 | */ | |
845 | static int match_ctxt(struct hfi1_filedata *fd, | |
846 | const struct hfi1_user_info *uinfo, | |
847 | struct hfi1_ctxtdata *uctxt) | |
848 | { | |
849 | struct hfi1_devdata *dd = fd->dd; | |
850 | unsigned long flags; | |
851 | u16 subctxt; | |
852 | ||
853 | /* Skip dynamically allocated kernel contexts */ | |
854 | if (uctxt->sc && (uctxt->sc->type == SC_KERNEL)) | |
855 | return 0; | |
856 | ||
857 | /* Skip ctxt if it doesn't match the requested one */ | |
858 | if (memcmp(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid)) || | |
859 | uctxt->jkey != generate_jkey(current_uid()) || | |
860 | uctxt->subctxt_id != uinfo->subctxt_id || | |
861 | uctxt->subctxt_cnt != uinfo->subctxt_cnt) | |
862 | return 0; | |
863 | ||
864 | /* Verify the sharing process matches the base */ | |
865 | if (uctxt->userversion != uinfo->userversion) | |
866 | return -EINVAL; | |
867 | ||
868 | /* Find an unused sub context */ | |
869 | spin_lock_irqsave(&dd->uctxt_lock, flags); | |
870 | if (bitmap_empty(uctxt->in_use_ctxts, HFI1_MAX_SHARED_CTXTS)) { | |
871 | /* context is being closed, do not use */ | |
872 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
873 | return 0; | |
874 | } | |
875 | ||
876 | subctxt = find_first_zero_bit(uctxt->in_use_ctxts, | |
877 | HFI1_MAX_SHARED_CTXTS); | |
878 | if (subctxt >= uctxt->subctxt_cnt) { | |
879 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
880 | return -EBUSY; | |
881 | } | |
882 | ||
883 | fd->subctxt = subctxt; | |
884 | __set_bit(fd->subctxt, uctxt->in_use_ctxts); | |
885 | spin_unlock_irqrestore(&dd->uctxt_lock, flags); | |
886 | ||
887 | fd->uctxt = uctxt; | |
888 | hfi1_rcd_get(uctxt); | |
889 | ||
890 | return 1; | |
891 | } | |
892 | ||
893 | /** | |
894 | * find_sub_ctxt | |
895 | * @fd: valid filedata pointer | |
896 | * @uinfo: matching info to use to find a possible context to share. | |
897 | * | |
8737ce95 | 898 | * The hfi1_mutex must be held when this function is called. It is |
f2a3bc00 | 899 | * necessary to ensure serialized creation of shared contexts. |
d295dbeb MR |
900 | * |
901 | * Return: | |
902 | * 0 No sub-context found | |
903 | * 1 Subcontext found and allocated | |
904 | * errno EINVAL (incorrect parameters) | |
905 | * EBUSY (all sub contexts in use) | |
8737ce95 | 906 | */ |
9b60d2cb MR |
907 | static int find_sub_ctxt(struct hfi1_filedata *fd, |
908 | const struct hfi1_user_info *uinfo) | |
77241056 | 909 | { |
d295dbeb | 910 | struct hfi1_ctxtdata *uctxt; |
5fbded48 | 911 | struct hfi1_devdata *dd = fd->dd; |
d295dbeb MR |
912 | u16 i; |
913 | int ret; | |
77241056 | 914 | |
f2a3bc00 MR |
915 | if (!uinfo->subctxt_cnt) |
916 | return 0; | |
917 | ||
5fbded48 | 918 | for (i = dd->first_dyn_alloc_ctxt; i < dd->num_rcv_contexts; i++) { |
d295dbeb MR |
919 | uctxt = hfi1_rcd_get_by_index(dd, i); |
920 | if (uctxt) { | |
921 | ret = match_ctxt(fd, uinfo, uctxt); | |
922 | hfi1_rcd_put(uctxt); | |
923 | /* value of != 0 will return */ | |
924 | if (ret) | |
925 | return ret; | |
926 | } | |
77241056 MM |
927 | } |
928 | ||
5fbded48 | 929 | return 0; |
77241056 MM |
930 | } |
931 | ||
5042cddf | 932 | static int allocate_ctxt(struct hfi1_filedata *fd, struct hfi1_devdata *dd, |
e87473bc | 933 | struct hfi1_user_info *uinfo, |
d295dbeb | 934 | struct hfi1_ctxtdata **rcd) |
77241056 MM |
935 | { |
936 | struct hfi1_ctxtdata *uctxt; | |
957558c9 | 937 | int ret, numa; |
77241056 MM |
938 | |
939 | if (dd->flags & HFI1_FROZEN) { | |
940 | /* | |
941 | * Pick an error that is unique from all other errors | |
942 | * that are returned so the user process knows that | |
943 | * it tried to allocate while the SPC was frozen. It | |
944 | * it should be able to retry with success in a short | |
945 | * while. | |
946 | */ | |
947 | return -EIO; | |
948 | } | |
949 | ||
5fbded48 MR |
950 | if (!dd->freectxts) |
951 | return -EBUSY; | |
952 | ||
b094a36f SS |
953 | /* |
954 | * If we don't have a NUMA node requested, preference is towards | |
955 | * device NUMA node. | |
956 | */ | |
957 | fd->rec_cpu_num = hfi1_get_proc_affinity(dd->node); | |
957558c9 MH |
958 | if (fd->rec_cpu_num != -1) |
959 | numa = cpu_to_node(fd->rec_cpu_num); | |
960 | else | |
961 | numa = numa_node_id(); | |
f2a3bc00 MR |
962 | ret = hfi1_create_ctxtdata(dd->pport, numa, &uctxt); |
963 | if (ret < 0) { | |
964 | dd_dev_err(dd, "user ctxtdata allocation failed\n"); | |
965 | return ret; | |
77241056 | 966 | } |
957558c9 MH |
967 | hfi1_cdbg(PROC, "[%u:%u] pid %u assigned to CPU %d (NUMA %u)", |
968 | uctxt->ctxt, fd->subctxt, current->pid, fd->rec_cpu_num, | |
969 | uctxt->numa_id); | |
970 | ||
77241056 MM |
971 | /* |
972 | * Allocate and enable a PIO send context. | |
973 | */ | |
f2a3bc00 | 974 | uctxt->sc = sc_alloc(dd, SC_USER, uctxt->rcvhdrqentsize, dd->node); |
3a6982df JP |
975 | if (!uctxt->sc) { |
976 | ret = -ENOMEM; | |
977 | goto ctxdata_free; | |
978 | } | |
6c63e423 SS |
979 | hfi1_cdbg(PROC, "allocated send context %u(%u)\n", uctxt->sc->sw_index, |
980 | uctxt->sc->hw_context); | |
77241056 MM |
981 | ret = sc_enable(uctxt->sc); |
982 | if (ret) | |
3a6982df JP |
983 | goto ctxdata_free; |
984 | ||
77241056 | 985 | /* |
f2a3bc00 | 986 | * Setup sub context information if the user-level has requested |
9b60d2cb | 987 | * sub contexts. |
77241056 | 988 | * This has to be done here so the rest of the sub-contexts find the |
f2a3bc00 | 989 | * proper base context. |
77241056 | 990 | */ |
f2a3bc00 MR |
991 | if (uinfo->subctxt_cnt) |
992 | init_subctxts(uctxt, uinfo); | |
77241056 | 993 | uctxt->userversion = uinfo->userversion; |
bdf7752e | 994 | uctxt->flags = hfi1_cap_mask; /* save current flag state */ |
77241056 MM |
995 | init_waitqueue_head(&uctxt->wait); |
996 | strlcpy(uctxt->comm, current->comm, sizeof(uctxt->comm)); | |
997 | memcpy(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid)); | |
998 | uctxt->jkey = generate_jkey(current_uid()); | |
77241056 | 999 | hfi1_stats.sps_ctxts++; |
affa48de AD |
1000 | /* |
1001 | * Disable ASPM when there are open user/PSM contexts to avoid | |
1002 | * issues with ASPM L1 exit latency | |
1003 | */ | |
1004 | if (dd->freectxts-- == dd->num_user_contexts) | |
1005 | aspm_disable_all(dd); | |
77241056 | 1006 | |
d295dbeb | 1007 | *rcd = uctxt; |
f683c80c | 1008 | |
77241056 | 1009 | return 0; |
3a6982df JP |
1010 | |
1011 | ctxdata_free: | |
d295dbeb | 1012 | hfi1_free_ctxt(uctxt); |
3a6982df | 1013 | return ret; |
77241056 MM |
1014 | } |
1015 | ||
42492011 MR |
1016 | static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt) |
1017 | { | |
1018 | mutex_lock(&hfi1_mutex); | |
1019 | hfi1_stats.sps_ctxts--; | |
1020 | if (++uctxt->dd->freectxts == uctxt->dd->num_user_contexts) | |
1021 | aspm_enable_all(uctxt->dd); | |
42492011 | 1022 | mutex_unlock(&hfi1_mutex); |
f2a3bc00 | 1023 | |
d295dbeb | 1024 | hfi1_free_ctxt(uctxt); |
42492011 MR |
1025 | } |
1026 | ||
f2a3bc00 MR |
1027 | static void init_subctxts(struct hfi1_ctxtdata *uctxt, |
1028 | const struct hfi1_user_info *uinfo) | |
77241056 | 1029 | { |
77241056 MM |
1030 | uctxt->subctxt_cnt = uinfo->subctxt_cnt; |
1031 | uctxt->subctxt_id = uinfo->subctxt_id; | |
9b60d2cb | 1032 | set_bit(HFI1_CTXT_BASE_UNINIT, &uctxt->event_flags); |
77241056 MM |
1033 | } |
1034 | ||
1035 | static int setup_subctxt(struct hfi1_ctxtdata *uctxt) | |
1036 | { | |
1037 | int ret = 0; | |
8737ce95 | 1038 | u16 num_subctxts = uctxt->subctxt_cnt; |
77241056 MM |
1039 | |
1040 | uctxt->subctxt_uregbase = vmalloc_user(PAGE_SIZE); | |
9b60d2cb MR |
1041 | if (!uctxt->subctxt_uregbase) |
1042 | return -ENOMEM; | |
1043 | ||
77241056 MM |
1044 | /* We can take the size of the RcvHdr Queue from the master */ |
1045 | uctxt->subctxt_rcvhdr_base = vmalloc_user(uctxt->rcvhdrq_size * | |
1046 | num_subctxts); | |
1047 | if (!uctxt->subctxt_rcvhdr_base) { | |
1048 | ret = -ENOMEM; | |
1049 | goto bail_ureg; | |
1050 | } | |
1051 | ||
1052 | uctxt->subctxt_rcvegrbuf = vmalloc_user(uctxt->egrbufs.size * | |
1053 | num_subctxts); | |
1054 | if (!uctxt->subctxt_rcvegrbuf) { | |
1055 | ret = -ENOMEM; | |
1056 | goto bail_rhdr; | |
1057 | } | |
9b60d2cb MR |
1058 | |
1059 | return 0; | |
1060 | ||
77241056 MM |
1061 | bail_rhdr: |
1062 | vfree(uctxt->subctxt_rcvhdr_base); | |
9b60d2cb | 1063 | uctxt->subctxt_rcvhdr_base = NULL; |
77241056 MM |
1064 | bail_ureg: |
1065 | vfree(uctxt->subctxt_uregbase); | |
1066 | uctxt->subctxt_uregbase = NULL; | |
9b60d2cb | 1067 | |
77241056 MM |
1068 | return ret; |
1069 | } | |
1070 | ||
62239fc6 | 1071 | static void user_init(struct hfi1_ctxtdata *uctxt) |
77241056 | 1072 | { |
77241056 | 1073 | unsigned int rcvctrl_ops = 0; |
77241056 MM |
1074 | |
1075 | /* initialize poll variables... */ | |
1076 | uctxt->urgent = 0; | |
1077 | uctxt->urgent_poll = 0; | |
1078 | ||
1079 | /* | |
1080 | * Now enable the ctxt for receive. | |
1081 | * For chips that are set to DMA the tail register to memory | |
1082 | * when they change (and when the update bit transitions from | |
1083 | * 0 to 1. So for those chips, we turn it off and then back on. | |
1084 | * This will (very briefly) affect any other open ctxts, but the | |
1085 | * duration is very short, and therefore isn't an issue. We | |
1086 | * explicitly set the in-memory tail copy to 0 beforehand, so we | |
1087 | * don't have to wait to be sure the DMA update has happened | |
1088 | * (chip resets head/tail to 0 on transition to enable). | |
1089 | */ | |
1090 | if (uctxt->rcvhdrtail_kvaddr) | |
1091 | clear_rcvhdrtail(uctxt); | |
1092 | ||
1093 | /* Setup J_KEY before enabling the context */ | |
17573972 | 1094 | hfi1_set_ctxt_jkey(uctxt->dd, uctxt, uctxt->jkey); |
77241056 MM |
1095 | |
1096 | rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB; | |
bdf7752e | 1097 | if (HFI1_CAP_UGET_MASK(uctxt->flags, HDRSUPP)) |
77241056 MM |
1098 | rcvctrl_ops |= HFI1_RCVCTRL_TIDFLOW_ENB; |
1099 | /* | |
1100 | * Ignore the bit in the flags for now until proper | |
1101 | * support for multiple packet per rcv array entry is | |
1102 | * added. | |
1103 | */ | |
bdf7752e | 1104 | if (!HFI1_CAP_UGET_MASK(uctxt->flags, MULTI_PKT_EGR)) |
77241056 | 1105 | rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB; |
bdf7752e | 1106 | if (HFI1_CAP_UGET_MASK(uctxt->flags, NODROP_EGR_FULL)) |
77241056 | 1107 | rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB; |
bdf7752e | 1108 | if (HFI1_CAP_UGET_MASK(uctxt->flags, NODROP_RHQ_FULL)) |
77241056 | 1109 | rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB; |
566c157c MH |
1110 | /* |
1111 | * The RcvCtxtCtrl.TailUpd bit has to be explicitly written. | |
1112 | * We can't rely on the correct value to be set from prior | |
1113 | * uses of the chip or ctxt. Therefore, add the rcvctrl op | |
1114 | * for both cases. | |
1115 | */ | |
bdf7752e | 1116 | if (HFI1_CAP_UGET_MASK(uctxt->flags, DMA_RTAIL)) |
77241056 | 1117 | rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB; |
566c157c MH |
1118 | else |
1119 | rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_DIS; | |
2250563e | 1120 | hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt); |
77241056 MM |
1121 | } |
1122 | ||
ff1a5582 | 1123 | static int get_ctxt_info(struct hfi1_filedata *fd, unsigned long arg, u32 len) |
77241056 MM |
1124 | { |
1125 | struct hfi1_ctxt_info cinfo; | |
9e10af47 | 1126 | struct hfi1_ctxtdata *uctxt = fd->uctxt; |
ff1a5582 MR |
1127 | |
1128 | if (sizeof(cinfo) != len) | |
1129 | return -EINVAL; | |
77241056 | 1130 | |
ebe6b2e8 | 1131 | memset(&cinfo, 0, sizeof(cinfo)); |
bdf7752e DL |
1132 | cinfo.runtime_flags = (((uctxt->flags >> HFI1_CAP_MISC_SHIFT) & |
1133 | HFI1_CAP_MISC_MASK) << HFI1_CAP_USER_SHIFT) | | |
1134 | HFI1_CAP_UGET_MASK(uctxt->flags, MASK) | | |
1135 | HFI1_CAP_KGET_MASK(uctxt->flags, K2U); | |
622c202c DL |
1136 | /* adjust flag if this fd is not able to cache */ |
1137 | if (!fd->handler) | |
1138 | cinfo.runtime_flags |= HFI1_CAP_TID_UNMAP; /* no caching */ | |
1139 | ||
77241056 MM |
1140 | cinfo.num_active = hfi1_count_active_units(); |
1141 | cinfo.unit = uctxt->dd->unit; | |
1142 | cinfo.ctxt = uctxt->ctxt; | |
9e10af47 | 1143 | cinfo.subctxt = fd->subctxt; |
77241056 MM |
1144 | cinfo.rcvtids = roundup(uctxt->egrbufs.alloced, |
1145 | uctxt->dd->rcv_entries.group_size) + | |
1146 | uctxt->expected_count; | |
1147 | cinfo.credits = uctxt->sc->credits; | |
1148 | cinfo.numa_node = uctxt->numa_id; | |
1149 | cinfo.rec_cpu = fd->rec_cpu_num; | |
1150 | cinfo.send_ctxt = uctxt->sc->hw_context; | |
1151 | ||
1152 | cinfo.egrtids = uctxt->egrbufs.alloced; | |
1153 | cinfo.rcvhdrq_cnt = uctxt->rcvhdrq_cnt; | |
1154 | cinfo.rcvhdrq_entsize = uctxt->rcvhdrqentsize << 2; | |
9e10af47 | 1155 | cinfo.sdma_ring_size = fd->cq->nentries; |
77241056 MM |
1156 | cinfo.rcvegr_size = uctxt->egrbufs.rcvtid_size; |
1157 | ||
9e10af47 | 1158 | trace_hfi1_ctxt_info(uctxt->dd, uctxt->ctxt, fd->subctxt, cinfo); |
ff1a5582 MR |
1159 | if (copy_to_user((void __user *)arg, &cinfo, len)) |
1160 | return -EFAULT; | |
bdf7752e | 1161 | |
ff1a5582 | 1162 | return 0; |
77241056 MM |
1163 | } |
1164 | ||
e87473bc MR |
1165 | static int init_user_ctxt(struct hfi1_filedata *fd, |
1166 | struct hfi1_ctxtdata *uctxt) | |
9b60d2cb | 1167 | { |
9b60d2cb MR |
1168 | int ret; |
1169 | ||
1170 | ret = hfi1_user_sdma_alloc_queues(uctxt, fd); | |
1171 | if (ret) | |
1172 | return ret; | |
1173 | ||
e87473bc MR |
1174 | ret = hfi1_user_exp_rcv_init(fd, uctxt); |
1175 | if (ret) | |
1176 | hfi1_user_sdma_free_queues(fd, uctxt); | |
9b60d2cb MR |
1177 | |
1178 | return ret; | |
1179 | } | |
1180 | ||
e87473bc MR |
1181 | static int setup_base_ctxt(struct hfi1_filedata *fd, |
1182 | struct hfi1_ctxtdata *uctxt) | |
77241056 | 1183 | { |
77241056 MM |
1184 | struct hfi1_devdata *dd = uctxt->dd; |
1185 | int ret = 0; | |
1186 | ||
9b60d2cb | 1187 | hfi1_init_ctxt(uctxt->sc); |
77241056 | 1188 | |
9b60d2cb MR |
1189 | /* Now allocate the RcvHdr queue and eager buffers. */ |
1190 | ret = hfi1_create_rcvhdrq(dd, uctxt); | |
1191 | if (ret) | |
b8f42738 | 1192 | goto done; |
94158442 | 1193 | |
9b60d2cb | 1194 | ret = hfi1_setup_eagerbufs(uctxt); |
94158442 | 1195 | if (ret) |
b8f42738 | 1196 | goto done; |
9b60d2cb MR |
1197 | |
1198 | /* If sub-contexts are enabled, do the appropriate setup */ | |
1199 | if (uctxt->subctxt_cnt) | |
1200 | ret = setup_subctxt(uctxt); | |
1201 | if (ret) | |
b8f42738 | 1202 | goto done; |
9b60d2cb | 1203 | |
9c1a99c3 | 1204 | ret = hfi1_alloc_ctxt_rcv_groups(uctxt); |
9b60d2cb | 1205 | if (ret) |
b8f42738 | 1206 | goto done; |
9b60d2cb | 1207 | |
e87473bc | 1208 | ret = init_user_ctxt(fd, uctxt); |
77241056 | 1209 | if (ret) |
b8f42738 | 1210 | goto done; |
77241056 | 1211 | |
62239fc6 MR |
1212 | user_init(uctxt); |
1213 | ||
e87473bc MR |
1214 | /* Now that the context is set up, the fd can get a reference. */ |
1215 | fd->uctxt = uctxt; | |
1216 | hfi1_rcd_get(uctxt); | |
1217 | ||
b8f42738 MR |
1218 | done: |
1219 | if (uctxt->subctxt_cnt) { | |
1220 | /* | |
1221 | * On error, set the failed bit so sub-contexts will clean up | |
1222 | * correctly. | |
1223 | */ | |
1224 | if (ret) | |
1225 | set_bit(HFI1_CTXT_BASE_FAILED, &uctxt->event_flags); | |
62239fc6 | 1226 | |
b8f42738 MR |
1227 | /* |
1228 | * Base context is done (successfully or not), notify anybody | |
1229 | * using a sub-context that is waiting for this completion. | |
1230 | */ | |
1231 | clear_bit(HFI1_CTXT_BASE_UNINIT, &uctxt->event_flags); | |
1232 | wake_up(&uctxt->wait); | |
1233 | } | |
d295dbeb | 1234 | |
77241056 MM |
1235 | return ret; |
1236 | } | |
1237 | ||
45afb324 | 1238 | static int get_base_info(struct hfi1_filedata *fd, unsigned long arg, u32 len) |
77241056 MM |
1239 | { |
1240 | struct hfi1_base_info binfo; | |
9e10af47 | 1241 | struct hfi1_ctxtdata *uctxt = fd->uctxt; |
77241056 | 1242 | struct hfi1_devdata *dd = uctxt->dd; |
77241056 | 1243 | unsigned offset; |
77241056 | 1244 | |
9b60d2cb | 1245 | trace_hfi1_uctxtdata(uctxt->dd, uctxt, fd->subctxt); |
77241056 | 1246 | |
45afb324 MR |
1247 | if (sizeof(binfo) != len) |
1248 | return -EINVAL; | |
1249 | ||
77241056 MM |
1250 | memset(&binfo, 0, sizeof(binfo)); |
1251 | binfo.hw_version = dd->revision; | |
1252 | binfo.sw_version = HFI1_KERN_SWVERSION; | |
1253 | binfo.bthqp = kdeth_qp; | |
1254 | binfo.jkey = uctxt->jkey; | |
1255 | /* | |
1256 | * If more than 64 contexts are enabled the allocated credit | |
1257 | * return will span two or three contiguous pages. Since we only | |
1258 | * map the page containing the context's credit return address, | |
1259 | * we need to calculate the offset in the proper page. | |
1260 | */ | |
1261 | offset = ((u64)uctxt->sc->hw_free - | |
1262 | (u64)dd->cr_base[uctxt->numa_id].va) % PAGE_SIZE; | |
1263 | binfo.sc_credits_addr = HFI1_MMAP_TOKEN(PIO_CRED, uctxt->ctxt, | |
9e10af47 | 1264 | fd->subctxt, offset); |
77241056 | 1265 | binfo.pio_bufbase = HFI1_MMAP_TOKEN(PIO_BUFS, uctxt->ctxt, |
9e10af47 | 1266 | fd->subctxt, |
77241056 MM |
1267 | uctxt->sc->base_addr); |
1268 | binfo.pio_bufbase_sop = HFI1_MMAP_TOKEN(PIO_BUFS_SOP, | |
1269 | uctxt->ctxt, | |
9e10af47 | 1270 | fd->subctxt, |
77241056 MM |
1271 | uctxt->sc->base_addr); |
1272 | binfo.rcvhdr_bufbase = HFI1_MMAP_TOKEN(RCV_HDRQ, uctxt->ctxt, | |
9e10af47 | 1273 | fd->subctxt, |
77241056 MM |
1274 | uctxt->rcvhdrq); |
1275 | binfo.rcvegr_bufbase = HFI1_MMAP_TOKEN(RCV_EGRBUF, uctxt->ctxt, | |
9e10af47 | 1276 | fd->subctxt, |
60368186 | 1277 | uctxt->egrbufs.rcvtids[0].dma); |
77241056 | 1278 | binfo.sdma_comp_bufbase = HFI1_MMAP_TOKEN(SDMA_COMP, uctxt->ctxt, |
033c16d7 | 1279 | fd->subctxt, 0); |
77241056 MM |
1280 | /* |
1281 | * user regs are at | |
1282 | * (RXE_PER_CONTEXT_USER + (ctxt * RXE_PER_CONTEXT_SIZE)) | |
1283 | */ | |
1284 | binfo.user_regbase = HFI1_MMAP_TOKEN(UREGS, uctxt->ctxt, | |
033c16d7 | 1285 | fd->subctxt, 0); |
21e5acc0 MR |
1286 | offset = offset_in_page((uctxt_offset(uctxt) + fd->subctxt) * |
1287 | sizeof(*dd->events)); | |
77241056 | 1288 | binfo.events_bufbase = HFI1_MMAP_TOKEN(EVENTS, uctxt->ctxt, |
033c16d7 MR |
1289 | fd->subctxt, |
1290 | offset); | |
77241056 | 1291 | binfo.status_bufbase = HFI1_MMAP_TOKEN(STATUS, uctxt->ctxt, |
033c16d7 MR |
1292 | fd->subctxt, |
1293 | dd->status); | |
77241056 MM |
1294 | if (HFI1_CAP_IS_USET(DMA_RTAIL)) |
1295 | binfo.rcvhdrtail_base = HFI1_MMAP_TOKEN(RTAIL, uctxt->ctxt, | |
033c16d7 | 1296 | fd->subctxt, 0); |
77241056 MM |
1297 | if (uctxt->subctxt_cnt) { |
1298 | binfo.subctxt_uregbase = HFI1_MMAP_TOKEN(SUBCTXT_UREGS, | |
77241056 | 1299 | uctxt->ctxt, |
9e10af47 | 1300 | fd->subctxt, 0); |
033c16d7 MR |
1301 | binfo.subctxt_rcvhdrbuf = HFI1_MMAP_TOKEN(SUBCTXT_RCV_HDRQ, |
1302 | uctxt->ctxt, | |
1303 | fd->subctxt, 0); | |
77241056 | 1304 | binfo.subctxt_rcvegrbuf = HFI1_MMAP_TOKEN(SUBCTXT_EGRBUF, |
033c16d7 MR |
1305 | uctxt->ctxt, |
1306 | fd->subctxt, 0); | |
77241056 | 1307 | } |
45afb324 MR |
1308 | |
1309 | if (copy_to_user((void __user *)arg, &binfo, len)) | |
1310 | return -EFAULT; | |
1311 | ||
1312 | return 0; | |
77241056 MM |
1313 | } |
1314 | ||
f404ca4c MR |
1315 | /** |
1316 | * user_exp_rcv_setup - Set up the given tid rcv list | |
1317 | * @fd: file data of the current driver instance | |
1318 | * @arg: ioctl argumnent for user space information | |
1319 | * @len: length of data structure associated with ioctl command | |
1320 | * | |
1321 | * Wrapper to validate ioctl information before doing _rcv_setup. | |
1322 | * | |
1323 | */ | |
1324 | static int user_exp_rcv_setup(struct hfi1_filedata *fd, unsigned long arg, | |
1325 | u32 len) | |
1326 | { | |
1327 | int ret; | |
1328 | unsigned long addr; | |
1329 | struct hfi1_tid_info tinfo; | |
1330 | ||
1331 | if (sizeof(tinfo) != len) | |
1332 | return -EINVAL; | |
1333 | ||
1334 | if (copy_from_user(&tinfo, (void __user *)arg, (sizeof(tinfo)))) | |
1335 | return -EFAULT; | |
1336 | ||
1337 | ret = hfi1_user_exp_rcv_setup(fd, &tinfo); | |
1338 | if (!ret) { | |
1339 | /* | |
1340 | * Copy the number of tidlist entries we used | |
1341 | * and the length of the buffer we registered. | |
1342 | */ | |
1343 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
1344 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
1345 | sizeof(tinfo.tidcnt))) | |
1346 | return -EFAULT; | |
1347 | ||
1348 | addr = arg + offsetof(struct hfi1_tid_info, length); | |
1349 | if (copy_to_user((void __user *)addr, &tinfo.length, | |
1350 | sizeof(tinfo.length))) | |
1351 | ret = -EFAULT; | |
1352 | } | |
1353 | ||
1354 | return ret; | |
1355 | } | |
1356 | ||
3920eef7 MR |
1357 | /** |
1358 | * user_exp_rcv_clear - Clear the given tid rcv list | |
1359 | * @fd: file data of the current driver instance | |
1360 | * @arg: ioctl argumnent for user space information | |
1361 | * @len: length of data structure associated with ioctl command | |
1362 | * | |
1363 | * The hfi1_user_exp_rcv_clear() can be called from the error path. Because | |
1364 | * of this, we need to use this wrapper to copy the user space information | |
1365 | * before doing the clear. | |
1366 | */ | |
1367 | static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg, | |
1368 | u32 len) | |
1369 | { | |
1370 | int ret; | |
1371 | unsigned long addr; | |
1372 | struct hfi1_tid_info tinfo; | |
1373 | ||
1374 | if (sizeof(tinfo) != len) | |
1375 | return -EINVAL; | |
1376 | ||
1377 | if (copy_from_user(&tinfo, (void __user *)arg, (sizeof(tinfo)))) | |
1378 | return -EFAULT; | |
1379 | ||
1380 | ret = hfi1_user_exp_rcv_clear(fd, &tinfo); | |
1381 | if (!ret) { | |
1382 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
1383 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
1384 | sizeof(tinfo.tidcnt))) | |
1385 | return -EFAULT; | |
1386 | } | |
1387 | ||
1388 | return ret; | |
1389 | } | |
1390 | ||
8a41da09 MR |
1391 | /** |
1392 | * user_exp_rcv_invalid - Invalidate the given tid rcv list | |
1393 | * @fd: file data of the current driver instance | |
1394 | * @arg: ioctl argumnent for user space information | |
1395 | * @len: length of data structure associated with ioctl command | |
1396 | * | |
1397 | * Wrapper to validate ioctl information before doing _rcv_invalid. | |
1398 | * | |
1399 | */ | |
1400 | static int user_exp_rcv_invalid(struct hfi1_filedata *fd, unsigned long arg, | |
1401 | u32 len) | |
1402 | { | |
1403 | int ret; | |
1404 | unsigned long addr; | |
1405 | struct hfi1_tid_info tinfo; | |
1406 | ||
1407 | if (sizeof(tinfo) != len) | |
1408 | return -EINVAL; | |
1409 | ||
1410 | if (!fd->invalid_tids) | |
1411 | return -EINVAL; | |
1412 | ||
1413 | if (copy_from_user(&tinfo, (void __user *)arg, (sizeof(tinfo)))) | |
1414 | return -EFAULT; | |
1415 | ||
1416 | ret = hfi1_user_exp_rcv_invalid(fd, &tinfo); | |
1417 | if (ret) | |
1418 | return ret; | |
1419 | ||
1420 | addr = arg + offsetof(struct hfi1_tid_info, tidcnt); | |
1421 | if (copy_to_user((void __user *)addr, &tinfo.tidcnt, | |
1422 | sizeof(tinfo.tidcnt))) | |
77241056 | 1423 | ret = -EFAULT; |
8a41da09 | 1424 | |
77241056 MM |
1425 | return ret; |
1426 | } | |
1427 | ||
afc9a42b | 1428 | static __poll_t poll_urgent(struct file *fp, |
77241056 MM |
1429 | struct poll_table_struct *pt) |
1430 | { | |
9e10af47 IW |
1431 | struct hfi1_filedata *fd = fp->private_data; |
1432 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 | 1433 | struct hfi1_devdata *dd = uctxt->dd; |
afc9a42b | 1434 | __poll_t pollflag; |
77241056 MM |
1435 | |
1436 | poll_wait(fp, &uctxt->wait, pt); | |
1437 | ||
1438 | spin_lock_irq(&dd->uctxt_lock); | |
1439 | if (uctxt->urgent != uctxt->urgent_poll) { | |
1440 | pollflag = POLLIN | POLLRDNORM; | |
1441 | uctxt->urgent_poll = uctxt->urgent; | |
1442 | } else { | |
1443 | pollflag = 0; | |
1444 | set_bit(HFI1_CTXT_WAITING_URG, &uctxt->event_flags); | |
1445 | } | |
1446 | spin_unlock_irq(&dd->uctxt_lock); | |
1447 | ||
1448 | return pollflag; | |
1449 | } | |
1450 | ||
afc9a42b | 1451 | static __poll_t poll_next(struct file *fp, |
77241056 MM |
1452 | struct poll_table_struct *pt) |
1453 | { | |
9e10af47 IW |
1454 | struct hfi1_filedata *fd = fp->private_data; |
1455 | struct hfi1_ctxtdata *uctxt = fd->uctxt; | |
77241056 | 1456 | struct hfi1_devdata *dd = uctxt->dd; |
afc9a42b | 1457 | __poll_t pollflag; |
77241056 MM |
1458 | |
1459 | poll_wait(fp, &uctxt->wait, pt); | |
1460 | ||
1461 | spin_lock_irq(&dd->uctxt_lock); | |
1462 | if (hdrqempty(uctxt)) { | |
1463 | set_bit(HFI1_CTXT_WAITING_RCV, &uctxt->event_flags); | |
2250563e | 1464 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_ENB, uctxt); |
77241056 | 1465 | pollflag = 0; |
e490974e | 1466 | } else { |
77241056 | 1467 | pollflag = POLLIN | POLLRDNORM; |
e490974e | 1468 | } |
77241056 MM |
1469 | spin_unlock_irq(&dd->uctxt_lock); |
1470 | ||
1471 | return pollflag; | |
1472 | } | |
1473 | ||
1474 | /* | |
1475 | * Find all user contexts in use, and set the specified bit in their | |
1476 | * event mask. | |
1477 | * See also find_ctxt() for a similar use, that is specific to send buffers. | |
1478 | */ | |
1479 | int hfi1_set_uevent_bits(struct hfi1_pportdata *ppd, const int evtbit) | |
1480 | { | |
1481 | struct hfi1_ctxtdata *uctxt; | |
1482 | struct hfi1_devdata *dd = ppd->dd; | |
e6f7622d | 1483 | u16 ctxt; |
77241056 | 1484 | |
d295dbeb MR |
1485 | if (!dd->events) |
1486 | return -EINVAL; | |
77241056 | 1487 | |
2280740f | 1488 | for (ctxt = dd->first_dyn_alloc_ctxt; ctxt < dd->num_rcv_contexts; |
77241056 | 1489 | ctxt++) { |
d295dbeb | 1490 | uctxt = hfi1_rcd_get_by_index(dd, ctxt); |
77241056 | 1491 | if (uctxt) { |
21e5acc0 | 1492 | unsigned long *evs; |
77241056 MM |
1493 | int i; |
1494 | /* | |
1495 | * subctxt_cnt is 0 if not shared, so do base | |
1496 | * separately, first, then remaining subctxt, if any | |
1497 | */ | |
21e5acc0 | 1498 | evs = dd->events + uctxt_offset(uctxt); |
77241056 MM |
1499 | set_bit(evtbit, evs); |
1500 | for (i = 1; i < uctxt->subctxt_cnt; i++) | |
1501 | set_bit(evtbit, evs + i); | |
d295dbeb | 1502 | hfi1_rcd_put(uctxt); |
77241056 MM |
1503 | } |
1504 | } | |
d295dbeb MR |
1505 | |
1506 | return 0; | |
77241056 MM |
1507 | } |
1508 | ||
1509 | /** | |
1510 | * manage_rcvq - manage a context's receive queue | |
1511 | * @uctxt: the context | |
1512 | * @subctxt: the sub-context | |
1513 | * @start_stop: action to carry out | |
1514 | * | |
1515 | * start_stop == 0 disables receive on the context, for use in queue | |
1516 | * overflow conditions. start_stop==1 re-enables, to be used to | |
1517 | * re-init the software copy of the head register | |
1518 | */ | |
8737ce95 | 1519 | static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt, |
88a69b65 | 1520 | unsigned long arg) |
77241056 MM |
1521 | { |
1522 | struct hfi1_devdata *dd = uctxt->dd; | |
1523 | unsigned int rcvctrl_op; | |
88a69b65 | 1524 | int start_stop; |
77241056 MM |
1525 | |
1526 | if (subctxt) | |
88a69b65 MR |
1527 | return 0; |
1528 | ||
1529 | if (get_user(start_stop, (int __user *)arg)) | |
1530 | return -EFAULT; | |
1531 | ||
77241056 MM |
1532 | /* atomically clear receive enable ctxt. */ |
1533 | if (start_stop) { | |
1534 | /* | |
1535 | * On enable, force in-memory copy of the tail register to | |
1536 | * 0, so that protocol code doesn't have to worry about | |
1537 | * whether or not the chip has yet updated the in-memory | |
1538 | * copy or not on return from the system call. The chip | |
1539 | * always resets it's tail register back to 0 on a | |
1540 | * transition from disabled to enabled. | |
1541 | */ | |
1542 | if (uctxt->rcvhdrtail_kvaddr) | |
1543 | clear_rcvhdrtail(uctxt); | |
1544 | rcvctrl_op = HFI1_RCVCTRL_CTXT_ENB; | |
e490974e | 1545 | } else { |
77241056 | 1546 | rcvctrl_op = HFI1_RCVCTRL_CTXT_DIS; |
e490974e | 1547 | } |
2250563e | 1548 | hfi1_rcvctrl(dd, rcvctrl_op, uctxt); |
77241056 | 1549 | /* always; new head should be equal to new tail; see above */ |
88a69b65 | 1550 | |
77241056 MM |
1551 | return 0; |
1552 | } | |
1553 | ||
1554 | /* | |
1555 | * clear the event notifier events for this context. | |
1556 | * User process then performs actions appropriate to bit having been | |
1557 | * set, if desired, and checks again in future. | |
1558 | */ | |
8737ce95 | 1559 | static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt, |
88a69b65 | 1560 | unsigned long arg) |
77241056 MM |
1561 | { |
1562 | int i; | |
1563 | struct hfi1_devdata *dd = uctxt->dd; | |
1564 | unsigned long *evs; | |
88a69b65 | 1565 | unsigned long events; |
77241056 MM |
1566 | |
1567 | if (!dd->events) | |
1568 | return 0; | |
1569 | ||
88a69b65 MR |
1570 | if (get_user(events, (unsigned long __user *)arg)) |
1571 | return -EFAULT; | |
1572 | ||
21e5acc0 | 1573 | evs = dd->events + uctxt_offset(uctxt) + subctxt; |
77241056 MM |
1574 | |
1575 | for (i = 0; i <= _HFI1_MAX_EVENT_BIT; i++) { | |
1576 | if (!test_bit(i, &events)) | |
1577 | continue; | |
1578 | clear_bit(i, evs); | |
1579 | } | |
1580 | return 0; | |
1581 | } | |
1582 | ||
88a69b65 | 1583 | static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned long arg) |
77241056 | 1584 | { |
88a69b65 | 1585 | int i; |
77241056 MM |
1586 | struct hfi1_pportdata *ppd = uctxt->ppd; |
1587 | struct hfi1_devdata *dd = uctxt->dd; | |
88a69b65 | 1588 | u16 pkey; |
77241056 | 1589 | |
88a69b65 MR |
1590 | if (!HFI1_CAP_IS_USET(PKEY_CHECK)) |
1591 | return -EPERM; | |
1592 | ||
1593 | if (get_user(pkey, (u16 __user *)arg)) | |
1594 | return -EFAULT; | |
1595 | ||
1596 | if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY) | |
1597 | return -EINVAL; | |
77241056 MM |
1598 | |
1599 | for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++) | |
88a69b65 MR |
1600 | if (pkey == ppd->pkeys[i]) |
1601 | return hfi1_set_ctxt_pkey(dd, uctxt, pkey); | |
77241056 | 1602 | |
88a69b65 | 1603 | return -ENOENT; |
77241056 MM |
1604 | } |
1605 | ||
ecf79985 MR |
1606 | /** |
1607 | * ctxt_reset - Reset the user context | |
1608 | * @uctxt: valid user context | |
1609 | */ | |
1610 | static int ctxt_reset(struct hfi1_ctxtdata *uctxt) | |
1611 | { | |
1612 | struct send_context *sc; | |
1613 | struct hfi1_devdata *dd; | |
1614 | int ret = 0; | |
1615 | ||
1616 | if (!uctxt || !uctxt->dd || !uctxt->sc) | |
1617 | return -EINVAL; | |
1618 | ||
1619 | /* | |
1620 | * There is no protection here. User level has to guarantee that | |
1621 | * no one will be writing to the send context while it is being | |
1622 | * re-initialized. If user level breaks that guarantee, it will | |
1623 | * break it's own context and no one else's. | |
1624 | */ | |
1625 | dd = uctxt->dd; | |
1626 | sc = uctxt->sc; | |
1627 | ||
1628 | /* | |
1629 | * Wait until the interrupt handler has marked the context as | |
1630 | * halted or frozen. Report error if we time out. | |
1631 | */ | |
1632 | wait_event_interruptible_timeout( | |
1633 | sc->halt_wait, (sc->flags & SCF_HALTED), | |
1634 | msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT)); | |
1635 | if (!(sc->flags & SCF_HALTED)) | |
1636 | return -ENOLCK; | |
1637 | ||
1638 | /* | |
1639 | * If the send context was halted due to a Freeze, wait until the | |
1640 | * device has been "unfrozen" before resetting the context. | |
1641 | */ | |
1642 | if (sc->flags & SCF_FROZEN) { | |
1643 | wait_event_interruptible_timeout( | |
1644 | dd->event_queue, | |
1645 | !(READ_ONCE(dd->flags) & HFI1_FROZEN), | |
1646 | msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT)); | |
1647 | if (dd->flags & HFI1_FROZEN) | |
1648 | return -ENOLCK; | |
1649 | ||
1650 | if (dd->flags & HFI1_FORCED_FREEZE) | |
1651 | /* | |
1652 | * Don't allow context reset if we are into | |
1653 | * forced freeze | |
1654 | */ | |
1655 | return -ENODEV; | |
1656 | ||
1657 | sc_disable(sc); | |
1658 | ret = sc_enable(sc); | |
1659 | hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB, uctxt); | |
1660 | } else { | |
1661 | ret = sc_restart(sc); | |
1662 | } | |
1663 | if (!ret) | |
1664 | sc_return_credits(sc); | |
77241056 | 1665 | |
77241056 MM |
1666 | return ret; |
1667 | } | |
1668 | ||
77241056 MM |
1669 | static void user_remove(struct hfi1_devdata *dd) |
1670 | { | |
77241056 MM |
1671 | |
1672 | hfi1_cdev_cleanup(&dd->user_cdev, &dd->user_device); | |
77241056 MM |
1673 | } |
1674 | ||
1675 | static int user_add(struct hfi1_devdata *dd) | |
1676 | { | |
1677 | char name[10]; | |
1678 | int ret; | |
1679 | ||
77241056 | 1680 | snprintf(name, sizeof(name), "%s_%d", class_name(), dd->unit); |
0eb62659 | 1681 | ret = hfi1_cdev_init(dd->unit, name, &hfi1_file_ops, |
e116a64f | 1682 | &dd->user_cdev, &dd->user_device, |
e11ffbd5 | 1683 | true, &dd->kobj); |
77241056 | 1684 | if (ret) |
7312f29d | 1685 | user_remove(dd); |
77241056 | 1686 | |
77241056 MM |
1687 | return ret; |
1688 | } | |
1689 | ||
1690 | /* | |
1691 | * Create per-unit files in /dev | |
1692 | */ | |
1693 | int hfi1_device_create(struct hfi1_devdata *dd) | |
1694 | { | |
0f7b1f91 | 1695 | return user_add(dd); |
77241056 MM |
1696 | } |
1697 | ||
1698 | /* | |
1699 | * Remove per-unit files in /dev | |
1700 | * void, core kernel returns no errors for this stuff | |
1701 | */ | |
1702 | void hfi1_device_remove(struct hfi1_devdata *dd) | |
1703 | { | |
1704 | user_remove(dd); | |
77241056 | 1705 | } |