2 * Copyright(c) 2015, 2016 Intel Corporation.
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.
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.
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.
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
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
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.
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.
47 #include <linux/poll.h>
48 #include <linux/cdev.h>
49 #include <linux/vmalloc.h>
59 #include "user_sdma.h"
60 #include "user_exp_rcv.h"
66 #define pr_fmt(fmt) DRIVER_NAME ": " fmt
68 #define SEND_CTXT_HALT_TIMEOUT 1000 /* msecs */
71 * File operation functions
73 static int hfi1_file_open(struct inode
*, struct file
*);
74 static int hfi1_file_close(struct inode
*, struct file
*);
75 static ssize_t
hfi1_write_iter(struct kiocb
*, struct iov_iter
*);
76 static unsigned int hfi1_poll(struct file
*, struct poll_table_struct
*);
77 static int hfi1_file_mmap(struct file
*, struct vm_area_struct
*);
79 static u64
kvirt_to_phys(void *);
80 static int assign_ctxt(struct file
*, struct hfi1_user_info
*);
81 static int init_subctxts(struct hfi1_ctxtdata
*, const struct hfi1_user_info
*);
82 static int user_init(struct file
*);
83 static int get_ctxt_info(struct file
*, void __user
*, __u32
);
84 static int get_base_info(struct file
*, void __user
*, __u32
);
85 static int setup_ctxt(struct file
*);
86 static int setup_subctxt(struct hfi1_ctxtdata
*);
87 static int get_user_context(struct file
*, struct hfi1_user_info
*, int);
88 static int find_shared_ctxt(struct file
*, const struct hfi1_user_info
*);
89 static int allocate_ctxt(struct file
*, struct hfi1_devdata
*,
90 struct hfi1_user_info
*);
91 static unsigned int poll_urgent(struct file
*, struct poll_table_struct
*);
92 static unsigned int poll_next(struct file
*, struct poll_table_struct
*);
93 static int user_event_ack(struct hfi1_ctxtdata
*, int, unsigned long);
94 static int set_ctxt_pkey(struct hfi1_ctxtdata
*, unsigned, u16
);
95 static int manage_rcvq(struct hfi1_ctxtdata
*, unsigned, int);
96 static int vma_fault(struct vm_area_struct
*, struct vm_fault
*);
97 static long hfi1_file_ioctl(struct file
*fp
, unsigned int cmd
,
100 static const struct file_operations hfi1_file_ops
= {
101 .owner
= THIS_MODULE
,
102 .write_iter
= hfi1_write_iter
,
103 .open
= hfi1_file_open
,
104 .release
= hfi1_file_close
,
105 .unlocked_ioctl
= hfi1_file_ioctl
,
107 .mmap
= hfi1_file_mmap
,
108 .llseek
= noop_llseek
,
111 static struct vm_operations_struct vm_ops
= {
116 * Types of memories mapped into user processes' space
135 * Masks and offsets defining the mmap tokens
137 #define HFI1_MMAP_OFFSET_MASK 0xfffULL
138 #define HFI1_MMAP_OFFSET_SHIFT 0
139 #define HFI1_MMAP_SUBCTXT_MASK 0xfULL
140 #define HFI1_MMAP_SUBCTXT_SHIFT 12
141 #define HFI1_MMAP_CTXT_MASK 0xffULL
142 #define HFI1_MMAP_CTXT_SHIFT 16
143 #define HFI1_MMAP_TYPE_MASK 0xfULL
144 #define HFI1_MMAP_TYPE_SHIFT 24
145 #define HFI1_MMAP_MAGIC_MASK 0xffffffffULL
146 #define HFI1_MMAP_MAGIC_SHIFT 32
148 #define HFI1_MMAP_MAGIC 0xdabbad00
150 #define HFI1_MMAP_TOKEN_SET(field, val) \
151 (((val) & HFI1_MMAP_##field##_MASK) << HFI1_MMAP_##field##_SHIFT)
152 #define HFI1_MMAP_TOKEN_GET(field, token) \
153 (((token) >> HFI1_MMAP_##field##_SHIFT) & HFI1_MMAP_##field##_MASK)
154 #define HFI1_MMAP_TOKEN(type, ctxt, subctxt, addr) \
155 (HFI1_MMAP_TOKEN_SET(MAGIC, HFI1_MMAP_MAGIC) | \
156 HFI1_MMAP_TOKEN_SET(TYPE, type) | \
157 HFI1_MMAP_TOKEN_SET(CTXT, ctxt) | \
158 HFI1_MMAP_TOKEN_SET(SUBCTXT, subctxt) | \
159 HFI1_MMAP_TOKEN_SET(OFFSET, (offset_in_page(addr))))
161 #define dbg(fmt, ...) \
162 pr_info(fmt, ##__VA_ARGS__)
164 static inline int is_valid_mmap(u64 token
)
166 return (HFI1_MMAP_TOKEN_GET(MAGIC
, token
) == HFI1_MMAP_MAGIC
);
169 static int hfi1_file_open(struct inode
*inode
, struct file
*fp
)
171 struct hfi1_filedata
*fd
;
172 struct hfi1_devdata
*dd
= container_of(inode
->i_cdev
,
176 /* Just take a ref now. Not all opens result in a context assign */
177 kobject_get(&dd
->kobj
);
179 /* The real work is performed later in assign_ctxt() */
181 fd
= kzalloc(sizeof(*fd
), GFP_KERNEL
);
184 fd
->rec_cpu_num
= -1; /* no cpu affinity by default */
185 fd
->mm
= current
->mm
;
188 fp
->private_data
= fd
;
190 return fd
? 0 : -ENOMEM
;
193 static long hfi1_file_ioctl(struct file
*fp
, unsigned int cmd
,
196 struct hfi1_filedata
*fd
= fp
->private_data
;
197 struct hfi1_ctxtdata
*uctxt
= fd
->uctxt
;
198 struct hfi1_user_info uinfo
;
199 struct hfi1_tid_info tinfo
;
203 unsigned long ul_uval
= 0;
206 hfi1_cdbg(IOCTL
, "IOCTL recv: 0x%x", cmd
);
207 if (cmd
!= HFI1_IOCTL_ASSIGN_CTXT
&&
208 cmd
!= HFI1_IOCTL_GET_VERS
&&
213 case HFI1_IOCTL_ASSIGN_CTXT
:
217 if (copy_from_user(&uinfo
,
218 (struct hfi1_user_info __user
*)arg
,
222 ret
= assign_ctxt(fp
, &uinfo
);
230 case HFI1_IOCTL_CTXT_INFO
:
231 ret
= get_ctxt_info(fp
, (void __user
*)(unsigned long)arg
,
232 sizeof(struct hfi1_ctxt_info
));
234 case HFI1_IOCTL_USER_INFO
:
235 ret
= get_base_info(fp
, (void __user
*)(unsigned long)arg
,
236 sizeof(struct hfi1_base_info
));
238 case HFI1_IOCTL_CREDIT_UPD
:
239 if (uctxt
&& uctxt
->sc
)
240 sc_return_credits(uctxt
->sc
);
243 case HFI1_IOCTL_TID_UPDATE
:
244 if (copy_from_user(&tinfo
,
245 (struct hfi11_tid_info __user
*)arg
,
249 ret
= hfi1_user_exp_rcv_setup(fp
, &tinfo
);
252 * Copy the number of tidlist entries we used
253 * and the length of the buffer we registered.
254 * These fields are adjacent in the structure so
255 * we can copy them at the same time.
257 addr
= arg
+ offsetof(struct hfi1_tid_info
, tidcnt
);
258 if (copy_to_user((void __user
*)addr
, &tinfo
.tidcnt
,
259 sizeof(tinfo
.tidcnt
) +
260 sizeof(tinfo
.length
)))
265 case HFI1_IOCTL_TID_FREE
:
266 if (copy_from_user(&tinfo
,
267 (struct hfi11_tid_info __user
*)arg
,
271 ret
= hfi1_user_exp_rcv_clear(fp
, &tinfo
);
274 addr
= arg
+ offsetof(struct hfi1_tid_info
, tidcnt
);
275 if (copy_to_user((void __user
*)addr
, &tinfo
.tidcnt
,
276 sizeof(tinfo
.tidcnt
)))
280 case HFI1_IOCTL_TID_INVAL_READ
:
281 if (copy_from_user(&tinfo
,
282 (struct hfi11_tid_info __user
*)arg
,
286 ret
= hfi1_user_exp_rcv_invalid(fp
, &tinfo
);
289 addr
= arg
+ offsetof(struct hfi1_tid_info
, tidcnt
);
290 if (copy_to_user((void __user
*)addr
, &tinfo
.tidcnt
,
291 sizeof(tinfo
.tidcnt
)))
295 case HFI1_IOCTL_RECV_CTRL
:
296 ret
= get_user(uval
, (int __user
*)arg
);
299 ret
= manage_rcvq(uctxt
, fd
->subctxt
, uval
);
302 case HFI1_IOCTL_POLL_TYPE
:
303 ret
= get_user(uval
, (int __user
*)arg
);
306 uctxt
->poll_type
= (typeof(uctxt
->poll_type
))uval
;
309 case HFI1_IOCTL_ACK_EVENT
:
310 ret
= get_user(ul_uval
, (unsigned long __user
*)arg
);
313 ret
= user_event_ack(uctxt
, fd
->subctxt
, ul_uval
);
316 case HFI1_IOCTL_SET_PKEY
:
317 ret
= get_user(uval16
, (u16 __user
*)arg
);
320 if (HFI1_CAP_IS_USET(PKEY_CHECK
))
321 ret
= set_ctxt_pkey(uctxt
, fd
->subctxt
, uval16
);
326 case HFI1_IOCTL_CTXT_RESET
: {
327 struct send_context
*sc
;
328 struct hfi1_devdata
*dd
;
330 if (!uctxt
|| !uctxt
->dd
|| !uctxt
->sc
)
334 * There is no protection here. User level has to
335 * guarantee that no one will be writing to the send
336 * context while it is being re-initialized.
337 * If user level breaks that guarantee, it will break
338 * it's own context and no one else's.
343 * Wait until the interrupt handler has marked the
344 * context as halted or frozen. Report error if we time
347 wait_event_interruptible_timeout(
348 sc
->halt_wait
, (sc
->flags
& SCF_HALTED
),
349 msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT
));
350 if (!(sc
->flags
& SCF_HALTED
))
354 * If the send context was halted due to a Freeze,
355 * wait until the device has been "unfrozen" before
356 * resetting the context.
358 if (sc
->flags
& SCF_FROZEN
) {
359 wait_event_interruptible_timeout(
361 !(ACCESS_ONCE(dd
->flags
) & HFI1_FROZEN
),
362 msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT
));
363 if (dd
->flags
& HFI1_FROZEN
)
366 if (dd
->flags
& HFI1_FORCED_FREEZE
)
368 * Don't allow context reset if we are into
375 hfi1_rcvctrl(dd
, HFI1_RCVCTRL_CTXT_ENB
,
378 ret
= sc_restart(sc
);
381 sc_return_credits(sc
);
385 case HFI1_IOCTL_GET_VERS
:
386 uval
= HFI1_USER_SWVERSION
;
387 if (put_user(uval
, (int __user
*)arg
))
398 static ssize_t
hfi1_write_iter(struct kiocb
*kiocb
, struct iov_iter
*from
)
400 struct hfi1_filedata
*fd
= kiocb
->ki_filp
->private_data
;
401 struct hfi1_user_sdma_pkt_q
*pq
= fd
->pq
;
402 struct hfi1_user_sdma_comp_q
*cq
= fd
->cq
;
403 int done
= 0, reqs
= 0;
404 unsigned long dim
= from
->nr_segs
;
409 if (!iter_is_iovec(from
) || !dim
)
412 hfi1_cdbg(SDMA
, "SDMA request from %u:%u (%lu)",
413 fd
->uctxt
->ctxt
, fd
->subctxt
, dim
);
415 if (atomic_read(&pq
->n_reqs
) == pq
->n_max_reqs
)
420 unsigned long count
= 0;
422 ret
= hfi1_user_sdma_process_request(
423 kiocb
->ki_filp
, (struct iovec
*)(from
->iov
+ done
),
437 static int hfi1_file_mmap(struct file
*fp
, struct vm_area_struct
*vma
)
439 struct hfi1_filedata
*fd
= fp
->private_data
;
440 struct hfi1_ctxtdata
*uctxt
= fd
->uctxt
;
441 struct hfi1_devdata
*dd
;
442 unsigned long flags
, pfn
;
443 u64 token
= vma
->vm_pgoff
<< PAGE_SHIFT
,
445 u8 subctxt
, mapio
= 0, vmf
= 0, type
;
450 if (!is_valid_mmap(token
) || !uctxt
||
451 !(vma
->vm_flags
& VM_SHARED
)) {
456 ctxt
= HFI1_MMAP_TOKEN_GET(CTXT
, token
);
457 subctxt
= HFI1_MMAP_TOKEN_GET(SUBCTXT
, token
);
458 type
= HFI1_MMAP_TOKEN_GET(TYPE
, token
);
459 if (ctxt
!= uctxt
->ctxt
|| subctxt
!= fd
->subctxt
) {
464 flags
= vma
->vm_flags
;
469 memaddr
= ((dd
->physaddr
+ TXE_PIO_SEND
) +
471 (uctxt
->sc
->hw_context
* BIT(16))) +
472 /* 64K PIO space / ctxt */
473 (type
== PIO_BUFS_SOP
?
474 (TXE_PIO_SIZE
/ 2) : 0); /* sop? */
476 * Map only the amount allocated to the context, not the
477 * entire available context's PIO space.
479 memlen
= PAGE_ALIGN(uctxt
->sc
->credits
* PIO_BLOCK_SIZE
);
480 flags
&= ~VM_MAYREAD
;
481 flags
|= VM_DONTCOPY
| VM_DONTEXPAND
;
482 vma
->vm_page_prot
= pgprot_writecombine(vma
->vm_page_prot
);
486 if (flags
& VM_WRITE
) {
491 * The credit return location for this context could be on the
492 * second or third page allocated for credit returns (if number
493 * of enabled contexts > 64 and 128 respectively).
495 memaddr
= dd
->cr_base
[uctxt
->numa_id
].pa
+
496 (((u64
)uctxt
->sc
->hw_free
-
497 (u64
)dd
->cr_base
[uctxt
->numa_id
].va
) & PAGE_MASK
);
499 flags
&= ~VM_MAYWRITE
;
500 flags
|= VM_DONTCOPY
| VM_DONTEXPAND
;
502 * The driver has already allocated memory for credit
503 * returns and programmed it into the chip. Has that
504 * memory been flagged as non-cached?
506 /* vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); */
510 memaddr
= uctxt
->rcvhdrq_phys
;
511 memlen
= uctxt
->rcvhdrq_size
;
517 * The RcvEgr buffer need to be handled differently
518 * as multiple non-contiguous pages need to be mapped
519 * into the user process.
521 memlen
= uctxt
->egrbufs
.size
;
522 if ((vma
->vm_end
- vma
->vm_start
) != memlen
) {
523 dd_dev_err(dd
, "Eager buffer map size invalid (%lu != %lu)\n",
524 (vma
->vm_end
- vma
->vm_start
), memlen
);
528 if (vma
->vm_flags
& VM_WRITE
) {
532 vma
->vm_flags
&= ~VM_MAYWRITE
;
533 addr
= vma
->vm_start
;
534 for (i
= 0 ; i
< uctxt
->egrbufs
.numbufs
; i
++) {
535 ret
= remap_pfn_range(
537 uctxt
->egrbufs
.buffers
[i
].phys
>> PAGE_SHIFT
,
538 uctxt
->egrbufs
.buffers
[i
].len
,
542 addr
+= uctxt
->egrbufs
.buffers
[i
].len
;
549 * Map only the page that contains this context's user
552 memaddr
= (unsigned long)
553 (dd
->physaddr
+ RXE_PER_CONTEXT_USER
)
554 + (uctxt
->ctxt
* RXE_PER_CONTEXT_SIZE
);
556 * TidFlow table is on the same page as the rest of the
560 flags
|= VM_DONTCOPY
| VM_DONTEXPAND
;
561 vma
->vm_page_prot
= pgprot_noncached(vma
->vm_page_prot
);
566 * Use the page where this context's flags are. User level
567 * knows where it's own bitmap is within the page.
569 memaddr
= (unsigned long)(dd
->events
+
570 ((uctxt
->ctxt
- dd
->first_user_ctxt
) *
571 HFI1_MAX_SHARED_CTXTS
)) & PAGE_MASK
;
574 * v3.7 removes VM_RESERVED but the effect is kept by
577 flags
|= VM_IO
| VM_DONTEXPAND
;
581 memaddr
= kvirt_to_phys((void *)dd
->status
);
583 flags
|= VM_IO
| VM_DONTEXPAND
;
586 if (!HFI1_CAP_IS_USET(DMA_RTAIL
)) {
588 * If the memory allocation failed, the context alloc
589 * also would have failed, so we would never get here
594 if (flags
& VM_WRITE
) {
598 memaddr
= uctxt
->rcvhdrqtailaddr_phys
;
600 flags
&= ~VM_MAYWRITE
;
603 memaddr
= (u64
)uctxt
->subctxt_uregbase
;
605 flags
|= VM_IO
| VM_DONTEXPAND
;
608 case SUBCTXT_RCV_HDRQ
:
609 memaddr
= (u64
)uctxt
->subctxt_rcvhdr_base
;
610 memlen
= uctxt
->rcvhdrq_size
* uctxt
->subctxt_cnt
;
611 flags
|= VM_IO
| VM_DONTEXPAND
;
615 memaddr
= (u64
)uctxt
->subctxt_rcvegrbuf
;
616 memlen
= uctxt
->egrbufs
.size
* uctxt
->subctxt_cnt
;
617 flags
|= VM_IO
| VM_DONTEXPAND
;
618 flags
&= ~VM_MAYWRITE
;
622 struct hfi1_user_sdma_comp_q
*cq
= fd
->cq
;
628 memaddr
= (u64
)cq
->comps
;
629 memlen
= PAGE_ALIGN(sizeof(*cq
->comps
) * cq
->nentries
);
630 flags
|= VM_IO
| VM_DONTEXPAND
;
639 if ((vma
->vm_end
- vma
->vm_start
) != memlen
) {
640 hfi1_cdbg(PROC
, "%u:%u Memory size mismatch %lu:%lu",
641 uctxt
->ctxt
, fd
->subctxt
,
642 (vma
->vm_end
- vma
->vm_start
), memlen
);
647 vma
->vm_flags
= flags
;
649 "%u:%u type:%u io/vf:%d/%d, addr:0x%llx, len:%lu(%lu), flags:0x%lx\n",
650 ctxt
, subctxt
, type
, mapio
, vmf
, memaddr
, memlen
,
651 vma
->vm_end
- vma
->vm_start
, vma
->vm_flags
);
652 pfn
= (unsigned long)(memaddr
>> PAGE_SHIFT
);
655 vma
->vm_ops
= &vm_ops
;
658 ret
= io_remap_pfn_range(vma
, vma
->vm_start
, pfn
, memlen
,
661 ret
= remap_pfn_range(vma
, vma
->vm_start
, pfn
, memlen
,
669 * Local (non-chip) user memory is not mapped right away but as it is
670 * accessed by the user-level code.
672 static int vma_fault(struct vm_area_struct
*vma
, struct vm_fault
*vmf
)
676 page
= vmalloc_to_page((void *)(vmf
->pgoff
<< PAGE_SHIFT
));
678 return VM_FAULT_SIGBUS
;
686 static unsigned int hfi1_poll(struct file
*fp
, struct poll_table_struct
*pt
)
688 struct hfi1_ctxtdata
*uctxt
;
691 uctxt
= ((struct hfi1_filedata
*)fp
->private_data
)->uctxt
;
694 else if (uctxt
->poll_type
== HFI1_POLL_TYPE_URGENT
)
695 pollflag
= poll_urgent(fp
, pt
);
696 else if (uctxt
->poll_type
== HFI1_POLL_TYPE_ANYRCV
)
697 pollflag
= poll_next(fp
, pt
);
704 static int hfi1_file_close(struct inode
*inode
, struct file
*fp
)
706 struct hfi1_filedata
*fdata
= fp
->private_data
;
707 struct hfi1_ctxtdata
*uctxt
= fdata
->uctxt
;
708 struct hfi1_devdata
*dd
= container_of(inode
->i_cdev
,
711 unsigned long flags
, *ev
;
713 fp
->private_data
= NULL
;
718 hfi1_cdbg(PROC
, "freeing ctxt %u:%u", uctxt
->ctxt
, fdata
->subctxt
);
719 mutex_lock(&hfi1_mutex
);
722 /* drain user sdma queue */
723 hfi1_user_sdma_free_queues(fdata
);
725 /* release the cpu */
726 hfi1_put_proc_affinity(fdata
->rec_cpu_num
);
729 * Clear any left over, unhandled events so the next process that
730 * gets this context doesn't get confused.
732 ev
= dd
->events
+ ((uctxt
->ctxt
- dd
->first_user_ctxt
) *
733 HFI1_MAX_SHARED_CTXTS
) + fdata
->subctxt
;
737 uctxt
->active_slaves
&= ~(1 << fdata
->subctxt
);
738 mutex_unlock(&hfi1_mutex
);
742 spin_lock_irqsave(&dd
->uctxt_lock
, flags
);
744 * Disable receive context and interrupt available, reset all
745 * RcvCtxtCtrl bits to default values.
747 hfi1_rcvctrl(dd
, HFI1_RCVCTRL_CTXT_DIS
|
748 HFI1_RCVCTRL_TIDFLOW_DIS
|
749 HFI1_RCVCTRL_INTRAVAIL_DIS
|
750 HFI1_RCVCTRL_TAILUPD_DIS
|
751 HFI1_RCVCTRL_ONE_PKT_EGR_DIS
|
752 HFI1_RCVCTRL_NO_RHQ_DROP_DIS
|
753 HFI1_RCVCTRL_NO_EGR_DROP_DIS
, uctxt
->ctxt
);
754 /* Clear the context's J_KEY */
755 hfi1_clear_ctxt_jkey(dd
, uctxt
->ctxt
);
757 * Reset context integrity checks to default.
758 * (writes to CSRs probably belong in chip.c)
760 write_kctxt_csr(dd
, uctxt
->sc
->hw_context
, SEND_CTXT_CHECK_ENABLE
,
761 hfi1_pkt_default_send_ctxt_mask(dd
, uctxt
->sc
->type
));
762 sc_disable(uctxt
->sc
);
763 spin_unlock_irqrestore(&dd
->uctxt_lock
, flags
);
765 dd
->rcd
[uctxt
->ctxt
] = NULL
;
767 hfi1_user_exp_rcv_free(fdata
);
768 hfi1_clear_ctxt_pkey(dd
, uctxt
->ctxt
);
770 uctxt
->rcvwait_to
= 0;
771 uctxt
->piowait_to
= 0;
772 uctxt
->rcvnowait
= 0;
773 uctxt
->pionowait
= 0;
774 uctxt
->event_flags
= 0;
776 hfi1_stats
.sps_ctxts
--;
777 if (++dd
->freectxts
== dd
->num_user_contexts
)
779 mutex_unlock(&hfi1_mutex
);
780 hfi1_free_ctxtdata(dd
, uctxt
);
782 kobject_put(&dd
->kobj
);
788 * Convert kernel *virtual* addresses to physical addresses.
789 * This is used to vmalloc'ed addresses.
791 static u64
kvirt_to_phys(void *addr
)
796 page
= vmalloc_to_page(addr
);
798 paddr
= page_to_pfn(page
) << PAGE_SHIFT
;
803 static int assign_ctxt(struct file
*fp
, struct hfi1_user_info
*uinfo
)
805 int i_minor
, ret
= 0;
806 unsigned int swmajor
, swminor
;
808 swmajor
= uinfo
->userversion
>> 16;
809 if (swmajor
!= HFI1_USER_SWMAJOR
) {
814 swminor
= uinfo
->userversion
& 0xffff;
816 mutex_lock(&hfi1_mutex
);
817 /* First, lets check if we need to setup a shared context? */
818 if (uinfo
->subctxt_cnt
) {
819 struct hfi1_filedata
*fd
= fp
->private_data
;
821 ret
= find_shared_ctxt(fp
, uinfo
);
826 hfi1_get_proc_affinity(fd
->uctxt
->numa_id
);
831 * We execute the following block if we couldn't find a
832 * shared context or if context sharing is not required.
835 i_minor
= iminor(file_inode(fp
)) - HFI1_USER_MINOR_BASE
;
836 ret
= get_user_context(fp
, uinfo
, i_minor
);
839 mutex_unlock(&hfi1_mutex
);
844 static int get_user_context(struct file
*fp
, struct hfi1_user_info
*uinfo
,
847 struct hfi1_devdata
*dd
= NULL
;
848 int devmax
, npresent
, nup
;
850 devmax
= hfi1_count_units(&npresent
, &nup
);
857 dd
= hfi1_lookup(devno
);
860 else if (!dd
->freectxts
)
863 return allocate_ctxt(fp
, dd
, uinfo
);
866 static int find_shared_ctxt(struct file
*fp
,
867 const struct hfi1_user_info
*uinfo
)
871 struct hfi1_filedata
*fd
= fp
->private_data
;
873 devmax
= hfi1_count_units(NULL
, NULL
);
875 for (ndev
= 0; ndev
< devmax
; ndev
++) {
876 struct hfi1_devdata
*dd
= hfi1_lookup(ndev
);
878 if (!(dd
&& (dd
->flags
& HFI1_PRESENT
) && dd
->kregbase
))
880 for (i
= dd
->first_user_ctxt
; i
< dd
->num_rcv_contexts
; i
++) {
881 struct hfi1_ctxtdata
*uctxt
= dd
->rcd
[i
];
883 /* Skip ctxts which are not yet open */
884 if (!uctxt
|| !uctxt
->cnt
)
886 /* Skip ctxt if it doesn't match the requested one */
887 if (memcmp(uctxt
->uuid
, uinfo
->uuid
,
888 sizeof(uctxt
->uuid
)) ||
889 uctxt
->jkey
!= generate_jkey(current_uid()) ||
890 uctxt
->subctxt_id
!= uinfo
->subctxt_id
||
891 uctxt
->subctxt_cnt
!= uinfo
->subctxt_cnt
)
894 /* Verify the sharing process matches the master */
895 if (uctxt
->userversion
!= uinfo
->userversion
||
896 uctxt
->cnt
>= uctxt
->subctxt_cnt
) {
901 fd
->subctxt
= uctxt
->cnt
++;
902 uctxt
->active_slaves
|= 1 << fd
->subctxt
;
912 static int allocate_ctxt(struct file
*fp
, struct hfi1_devdata
*dd
,
913 struct hfi1_user_info
*uinfo
)
915 struct hfi1_filedata
*fd
= fp
->private_data
;
916 struct hfi1_ctxtdata
*uctxt
;
920 if (dd
->flags
& HFI1_FROZEN
) {
922 * Pick an error that is unique from all other errors
923 * that are returned so the user process knows that
924 * it tried to allocate while the SPC was frozen. It
925 * it should be able to retry with success in a short
931 for (ctxt
= dd
->first_user_ctxt
; ctxt
< dd
->num_rcv_contexts
; ctxt
++)
935 if (ctxt
== dd
->num_rcv_contexts
)
939 * If we don't have a NUMA node requested, preference is towards
942 fd
->rec_cpu_num
= hfi1_get_proc_affinity(dd
->node
);
943 if (fd
->rec_cpu_num
!= -1)
944 numa
= cpu_to_node(fd
->rec_cpu_num
);
946 numa
= numa_node_id();
947 uctxt
= hfi1_create_ctxtdata(dd
->pport
, ctxt
, numa
);
950 "Unable to allocate ctxtdata memory, failing open\n");
953 hfi1_cdbg(PROC
, "[%u:%u] pid %u assigned to CPU %d (NUMA %u)",
954 uctxt
->ctxt
, fd
->subctxt
, current
->pid
, fd
->rec_cpu_num
,
958 * Allocate and enable a PIO send context.
960 uctxt
->sc
= sc_alloc(dd
, SC_USER
, uctxt
->rcvhdrqentsize
,
965 hfi1_cdbg(PROC
, "allocated send context %u(%u)\n", uctxt
->sc
->sw_index
,
966 uctxt
->sc
->hw_context
);
967 ret
= sc_enable(uctxt
->sc
);
971 * Setup shared context resources if the user-level has requested
972 * shared contexts and this is the 'master' process.
973 * This has to be done here so the rest of the sub-contexts find the
976 if (uinfo
->subctxt_cnt
&& !fd
->subctxt
) {
977 ret
= init_subctxts(uctxt
, uinfo
);
979 * On error, we don't need to disable and de-allocate the
980 * send context because it will be done during file close
985 uctxt
->userversion
= uinfo
->userversion
;
986 uctxt
->flags
= hfi1_cap_mask
; /* save current flag state */
987 init_waitqueue_head(&uctxt
->wait
);
988 strlcpy(uctxt
->comm
, current
->comm
, sizeof(uctxt
->comm
));
989 memcpy(uctxt
->uuid
, uinfo
->uuid
, sizeof(uctxt
->uuid
));
990 uctxt
->jkey
= generate_jkey(current_uid());
991 INIT_LIST_HEAD(&uctxt
->sdma_queues
);
992 spin_lock_init(&uctxt
->sdma_qlock
);
993 hfi1_stats
.sps_ctxts
++;
995 * Disable ASPM when there are open user/PSM contexts to avoid
996 * issues with ASPM L1 exit latency
998 if (dd
->freectxts
-- == dd
->num_user_contexts
)
999 aspm_disable_all(dd
);
1005 static int init_subctxts(struct hfi1_ctxtdata
*uctxt
,
1006 const struct hfi1_user_info
*uinfo
)
1008 unsigned num_subctxts
;
1010 num_subctxts
= uinfo
->subctxt_cnt
;
1011 if (num_subctxts
> HFI1_MAX_SHARED_CTXTS
)
1014 uctxt
->subctxt_cnt
= uinfo
->subctxt_cnt
;
1015 uctxt
->subctxt_id
= uinfo
->subctxt_id
;
1016 uctxt
->active_slaves
= 1;
1017 uctxt
->redirect_seq_cnt
= 1;
1018 set_bit(HFI1_CTXT_MASTER_UNINIT
, &uctxt
->event_flags
);
1023 static int setup_subctxt(struct hfi1_ctxtdata
*uctxt
)
1026 unsigned num_subctxts
= uctxt
->subctxt_cnt
;
1028 uctxt
->subctxt_uregbase
= vmalloc_user(PAGE_SIZE
);
1029 if (!uctxt
->subctxt_uregbase
) {
1033 /* We can take the size of the RcvHdr Queue from the master */
1034 uctxt
->subctxt_rcvhdr_base
= vmalloc_user(uctxt
->rcvhdrq_size
*
1036 if (!uctxt
->subctxt_rcvhdr_base
) {
1041 uctxt
->subctxt_rcvegrbuf
= vmalloc_user(uctxt
->egrbufs
.size
*
1043 if (!uctxt
->subctxt_rcvegrbuf
) {
1049 vfree(uctxt
->subctxt_rcvhdr_base
);
1051 vfree(uctxt
->subctxt_uregbase
);
1052 uctxt
->subctxt_uregbase
= NULL
;
1057 static int user_init(struct file
*fp
)
1059 unsigned int rcvctrl_ops
= 0;
1060 struct hfi1_filedata
*fd
= fp
->private_data
;
1061 struct hfi1_ctxtdata
*uctxt
= fd
->uctxt
;
1063 /* make sure that the context has already been setup */
1064 if (!test_bit(HFI1_CTXT_SETUP_DONE
, &uctxt
->event_flags
))
1067 /* initialize poll variables... */
1069 uctxt
->urgent_poll
= 0;
1072 * Now enable the ctxt for receive.
1073 * For chips that are set to DMA the tail register to memory
1074 * when they change (and when the update bit transitions from
1075 * 0 to 1. So for those chips, we turn it off and then back on.
1076 * This will (very briefly) affect any other open ctxts, but the
1077 * duration is very short, and therefore isn't an issue. We
1078 * explicitly set the in-memory tail copy to 0 beforehand, so we
1079 * don't have to wait to be sure the DMA update has happened
1080 * (chip resets head/tail to 0 on transition to enable).
1082 if (uctxt
->rcvhdrtail_kvaddr
)
1083 clear_rcvhdrtail(uctxt
);
1085 /* Setup J_KEY before enabling the context */
1086 hfi1_set_ctxt_jkey(uctxt
->dd
, uctxt
->ctxt
, uctxt
->jkey
);
1088 rcvctrl_ops
= HFI1_RCVCTRL_CTXT_ENB
;
1089 if (HFI1_CAP_UGET_MASK(uctxt
->flags
, HDRSUPP
))
1090 rcvctrl_ops
|= HFI1_RCVCTRL_TIDFLOW_ENB
;
1092 * Ignore the bit in the flags for now until proper
1093 * support for multiple packet per rcv array entry is
1096 if (!HFI1_CAP_UGET_MASK(uctxt
->flags
, MULTI_PKT_EGR
))
1097 rcvctrl_ops
|= HFI1_RCVCTRL_ONE_PKT_EGR_ENB
;
1098 if (HFI1_CAP_UGET_MASK(uctxt
->flags
, NODROP_EGR_FULL
))
1099 rcvctrl_ops
|= HFI1_RCVCTRL_NO_EGR_DROP_ENB
;
1100 if (HFI1_CAP_UGET_MASK(uctxt
->flags
, NODROP_RHQ_FULL
))
1101 rcvctrl_ops
|= HFI1_RCVCTRL_NO_RHQ_DROP_ENB
;
1103 * The RcvCtxtCtrl.TailUpd bit has to be explicitly written.
1104 * We can't rely on the correct value to be set from prior
1105 * uses of the chip or ctxt. Therefore, add the rcvctrl op
1108 if (HFI1_CAP_UGET_MASK(uctxt
->flags
, DMA_RTAIL
))
1109 rcvctrl_ops
|= HFI1_RCVCTRL_TAILUPD_ENB
;
1111 rcvctrl_ops
|= HFI1_RCVCTRL_TAILUPD_DIS
;
1112 hfi1_rcvctrl(uctxt
->dd
, rcvctrl_ops
, uctxt
->ctxt
);
1114 /* Notify any waiting slaves */
1115 if (uctxt
->subctxt_cnt
) {
1116 clear_bit(HFI1_CTXT_MASTER_UNINIT
, &uctxt
->event_flags
);
1117 wake_up(&uctxt
->wait
);
1123 static int get_ctxt_info(struct file
*fp
, void __user
*ubase
, __u32 len
)
1125 struct hfi1_ctxt_info cinfo
;
1126 struct hfi1_filedata
*fd
= fp
->private_data
;
1127 struct hfi1_ctxtdata
*uctxt
= fd
->uctxt
;
1130 memset(&cinfo
, 0, sizeof(cinfo
));
1131 cinfo
.runtime_flags
= (((uctxt
->flags
>> HFI1_CAP_MISC_SHIFT
) &
1132 HFI1_CAP_MISC_MASK
) << HFI1_CAP_USER_SHIFT
) |
1133 HFI1_CAP_UGET_MASK(uctxt
->flags
, MASK
) |
1134 HFI1_CAP_KGET_MASK(uctxt
->flags
, K2U
);
1135 cinfo
.num_active
= hfi1_count_active_units();
1136 cinfo
.unit
= uctxt
->dd
->unit
;
1137 cinfo
.ctxt
= uctxt
->ctxt
;
1138 cinfo
.subctxt
= fd
->subctxt
;
1139 cinfo
.rcvtids
= roundup(uctxt
->egrbufs
.alloced
,
1140 uctxt
->dd
->rcv_entries
.group_size
) +
1141 uctxt
->expected_count
;
1142 cinfo
.credits
= uctxt
->sc
->credits
;
1143 cinfo
.numa_node
= uctxt
->numa_id
;
1144 cinfo
.rec_cpu
= fd
->rec_cpu_num
;
1145 cinfo
.send_ctxt
= uctxt
->sc
->hw_context
;
1147 cinfo
.egrtids
= uctxt
->egrbufs
.alloced
;
1148 cinfo
.rcvhdrq_cnt
= uctxt
->rcvhdrq_cnt
;
1149 cinfo
.rcvhdrq_entsize
= uctxt
->rcvhdrqentsize
<< 2;
1150 cinfo
.sdma_ring_size
= fd
->cq
->nentries
;
1151 cinfo
.rcvegr_size
= uctxt
->egrbufs
.rcvtid_size
;
1153 trace_hfi1_ctxt_info(uctxt
->dd
, uctxt
->ctxt
, fd
->subctxt
, cinfo
);
1154 if (copy_to_user(ubase
, &cinfo
, sizeof(cinfo
)))
1160 static int setup_ctxt(struct file
*fp
)
1162 struct hfi1_filedata
*fd
= fp
->private_data
;
1163 struct hfi1_ctxtdata
*uctxt
= fd
->uctxt
;
1164 struct hfi1_devdata
*dd
= uctxt
->dd
;
1168 * Context should be set up only once, including allocation and
1169 * programming of eager buffers. This is done if context sharing
1170 * is not requested or by the master process.
1172 if (!uctxt
->subctxt_cnt
|| !fd
->subctxt
) {
1173 ret
= hfi1_init_ctxt(uctxt
->sc
);
1177 /* Now allocate the RcvHdr queue and eager buffers. */
1178 ret
= hfi1_create_rcvhdrq(dd
, uctxt
);
1181 ret
= hfi1_setup_eagerbufs(uctxt
);
1184 if (uctxt
->subctxt_cnt
&& !fd
->subctxt
) {
1185 ret
= setup_subctxt(uctxt
);
1190 ret
= wait_event_interruptible(uctxt
->wait
, !test_bit(
1191 HFI1_CTXT_MASTER_UNINIT
,
1192 &uctxt
->event_flags
));
1197 ret
= hfi1_user_sdma_alloc_queues(uctxt
, fp
);
1201 * Expected receive has to be setup for all processes (including
1202 * shared contexts). However, it has to be done after the master
1203 * context has been fully configured as it depends on the
1204 * eager/expected split of the RcvArray entries.
1205 * Setting it up here ensures that the subcontexts will be waiting
1206 * (due to the above wait_event_interruptible() until the master
1209 ret
= hfi1_user_exp_rcv_init(fp
);
1213 set_bit(HFI1_CTXT_SETUP_DONE
, &uctxt
->event_flags
);
1218 static int get_base_info(struct file
*fp
, void __user
*ubase
, __u32 len
)
1220 struct hfi1_base_info binfo
;
1221 struct hfi1_filedata
*fd
= fp
->private_data
;
1222 struct hfi1_ctxtdata
*uctxt
= fd
->uctxt
;
1223 struct hfi1_devdata
*dd
= uctxt
->dd
;
1228 trace_hfi1_uctxtdata(uctxt
->dd
, uctxt
);
1230 memset(&binfo
, 0, sizeof(binfo
));
1231 binfo
.hw_version
= dd
->revision
;
1232 binfo
.sw_version
= HFI1_KERN_SWVERSION
;
1233 binfo
.bthqp
= kdeth_qp
;
1234 binfo
.jkey
= uctxt
->jkey
;
1236 * If more than 64 contexts are enabled the allocated credit
1237 * return will span two or three contiguous pages. Since we only
1238 * map the page containing the context's credit return address,
1239 * we need to calculate the offset in the proper page.
1241 offset
= ((u64
)uctxt
->sc
->hw_free
-
1242 (u64
)dd
->cr_base
[uctxt
->numa_id
].va
) % PAGE_SIZE
;
1243 binfo
.sc_credits_addr
= HFI1_MMAP_TOKEN(PIO_CRED
, uctxt
->ctxt
,
1244 fd
->subctxt
, offset
);
1245 binfo
.pio_bufbase
= HFI1_MMAP_TOKEN(PIO_BUFS
, uctxt
->ctxt
,
1247 uctxt
->sc
->base_addr
);
1248 binfo
.pio_bufbase_sop
= HFI1_MMAP_TOKEN(PIO_BUFS_SOP
,
1251 uctxt
->sc
->base_addr
);
1252 binfo
.rcvhdr_bufbase
= HFI1_MMAP_TOKEN(RCV_HDRQ
, uctxt
->ctxt
,
1255 binfo
.rcvegr_bufbase
= HFI1_MMAP_TOKEN(RCV_EGRBUF
, uctxt
->ctxt
,
1257 uctxt
->egrbufs
.rcvtids
[0].phys
);
1258 binfo
.sdma_comp_bufbase
= HFI1_MMAP_TOKEN(SDMA_COMP
, uctxt
->ctxt
,
1262 * (RXE_PER_CONTEXT_USER + (ctxt * RXE_PER_CONTEXT_SIZE))
1264 binfo
.user_regbase
= HFI1_MMAP_TOKEN(UREGS
, uctxt
->ctxt
,
1266 offset
= offset_in_page((((uctxt
->ctxt
- dd
->first_user_ctxt
) *
1267 HFI1_MAX_SHARED_CTXTS
) + fd
->subctxt
) *
1268 sizeof(*dd
->events
));
1269 binfo
.events_bufbase
= HFI1_MMAP_TOKEN(EVENTS
, uctxt
->ctxt
,
1272 binfo
.status_bufbase
= HFI1_MMAP_TOKEN(STATUS
, uctxt
->ctxt
,
1275 if (HFI1_CAP_IS_USET(DMA_RTAIL
))
1276 binfo
.rcvhdrtail_base
= HFI1_MMAP_TOKEN(RTAIL
, uctxt
->ctxt
,
1278 if (uctxt
->subctxt_cnt
) {
1279 binfo
.subctxt_uregbase
= HFI1_MMAP_TOKEN(SUBCTXT_UREGS
,
1282 binfo
.subctxt_rcvhdrbuf
= HFI1_MMAP_TOKEN(SUBCTXT_RCV_HDRQ
,
1285 binfo
.subctxt_rcvegrbuf
= HFI1_MMAP_TOKEN(SUBCTXT_EGRBUF
,
1289 sz
= (len
< sizeof(binfo
)) ? len
: sizeof(binfo
);
1290 if (copy_to_user(ubase
, &binfo
, sz
))
1295 static unsigned int poll_urgent(struct file
*fp
,
1296 struct poll_table_struct
*pt
)
1298 struct hfi1_filedata
*fd
= fp
->private_data
;
1299 struct hfi1_ctxtdata
*uctxt
= fd
->uctxt
;
1300 struct hfi1_devdata
*dd
= uctxt
->dd
;
1303 poll_wait(fp
, &uctxt
->wait
, pt
);
1305 spin_lock_irq(&dd
->uctxt_lock
);
1306 if (uctxt
->urgent
!= uctxt
->urgent_poll
) {
1307 pollflag
= POLLIN
| POLLRDNORM
;
1308 uctxt
->urgent_poll
= uctxt
->urgent
;
1311 set_bit(HFI1_CTXT_WAITING_URG
, &uctxt
->event_flags
);
1313 spin_unlock_irq(&dd
->uctxt_lock
);
1318 static unsigned int poll_next(struct file
*fp
,
1319 struct poll_table_struct
*pt
)
1321 struct hfi1_filedata
*fd
= fp
->private_data
;
1322 struct hfi1_ctxtdata
*uctxt
= fd
->uctxt
;
1323 struct hfi1_devdata
*dd
= uctxt
->dd
;
1326 poll_wait(fp
, &uctxt
->wait
, pt
);
1328 spin_lock_irq(&dd
->uctxt_lock
);
1329 if (hdrqempty(uctxt
)) {
1330 set_bit(HFI1_CTXT_WAITING_RCV
, &uctxt
->event_flags
);
1331 hfi1_rcvctrl(dd
, HFI1_RCVCTRL_INTRAVAIL_ENB
, uctxt
->ctxt
);
1334 pollflag
= POLLIN
| POLLRDNORM
;
1336 spin_unlock_irq(&dd
->uctxt_lock
);
1342 * Find all user contexts in use, and set the specified bit in their
1344 * See also find_ctxt() for a similar use, that is specific to send buffers.
1346 int hfi1_set_uevent_bits(struct hfi1_pportdata
*ppd
, const int evtbit
)
1348 struct hfi1_ctxtdata
*uctxt
;
1349 struct hfi1_devdata
*dd
= ppd
->dd
;
1352 unsigned long flags
;
1359 spin_lock_irqsave(&dd
->uctxt_lock
, flags
);
1360 for (ctxt
= dd
->first_user_ctxt
; ctxt
< dd
->num_rcv_contexts
;
1362 uctxt
= dd
->rcd
[ctxt
];
1364 unsigned long *evs
= dd
->events
+
1365 (uctxt
->ctxt
- dd
->first_user_ctxt
) *
1366 HFI1_MAX_SHARED_CTXTS
;
1369 * subctxt_cnt is 0 if not shared, so do base
1370 * separately, first, then remaining subctxt, if any
1372 set_bit(evtbit
, evs
);
1373 for (i
= 1; i
< uctxt
->subctxt_cnt
; i
++)
1374 set_bit(evtbit
, evs
+ i
);
1377 spin_unlock_irqrestore(&dd
->uctxt_lock
, flags
);
1383 * manage_rcvq - manage a context's receive queue
1384 * @uctxt: the context
1385 * @subctxt: the sub-context
1386 * @start_stop: action to carry out
1388 * start_stop == 0 disables receive on the context, for use in queue
1389 * overflow conditions. start_stop==1 re-enables, to be used to
1390 * re-init the software copy of the head register
1392 static int manage_rcvq(struct hfi1_ctxtdata
*uctxt
, unsigned subctxt
,
1395 struct hfi1_devdata
*dd
= uctxt
->dd
;
1396 unsigned int rcvctrl_op
;
1400 /* atomically clear receive enable ctxt. */
1403 * On enable, force in-memory copy of the tail register to
1404 * 0, so that protocol code doesn't have to worry about
1405 * whether or not the chip has yet updated the in-memory
1406 * copy or not on return from the system call. The chip
1407 * always resets it's tail register back to 0 on a
1408 * transition from disabled to enabled.
1410 if (uctxt
->rcvhdrtail_kvaddr
)
1411 clear_rcvhdrtail(uctxt
);
1412 rcvctrl_op
= HFI1_RCVCTRL_CTXT_ENB
;
1414 rcvctrl_op
= HFI1_RCVCTRL_CTXT_DIS
;
1416 hfi1_rcvctrl(dd
, rcvctrl_op
, uctxt
->ctxt
);
1417 /* always; new head should be equal to new tail; see above */
1423 * clear the event notifier events for this context.
1424 * User process then performs actions appropriate to bit having been
1425 * set, if desired, and checks again in future.
1427 static int user_event_ack(struct hfi1_ctxtdata
*uctxt
, int subctxt
,
1428 unsigned long events
)
1431 struct hfi1_devdata
*dd
= uctxt
->dd
;
1437 evs
= dd
->events
+ ((uctxt
->ctxt
- dd
->first_user_ctxt
) *
1438 HFI1_MAX_SHARED_CTXTS
) + subctxt
;
1440 for (i
= 0; i
<= _HFI1_MAX_EVENT_BIT
; i
++) {
1441 if (!test_bit(i
, &events
))
1448 static int set_ctxt_pkey(struct hfi1_ctxtdata
*uctxt
, unsigned subctxt
,
1451 int ret
= -ENOENT
, i
, intable
= 0;
1452 struct hfi1_pportdata
*ppd
= uctxt
->ppd
;
1453 struct hfi1_devdata
*dd
= uctxt
->dd
;
1455 if (pkey
== LIM_MGMT_P_KEY
|| pkey
== FULL_MGMT_P_KEY
) {
1460 for (i
= 0; i
< ARRAY_SIZE(ppd
->pkeys
); i
++)
1461 if (pkey
== ppd
->pkeys
[i
]) {
1467 ret
= hfi1_set_ctxt_pkey(dd
, uctxt
->ctxt
, pkey
);
1472 static void user_remove(struct hfi1_devdata
*dd
)
1475 hfi1_cdev_cleanup(&dd
->user_cdev
, &dd
->user_device
);
1478 static int user_add(struct hfi1_devdata
*dd
)
1483 snprintf(name
, sizeof(name
), "%s_%d", class_name(), dd
->unit
);
1484 ret
= hfi1_cdev_init(dd
->unit
, name
, &hfi1_file_ops
,
1485 &dd
->user_cdev
, &dd
->user_device
,
1494 * Create per-unit files in /dev
1496 int hfi1_device_create(struct hfi1_devdata
*dd
)
1498 return user_add(dd
);
1502 * Remove per-unit files in /dev
1503 * void, core kernel returns no errors for this stuff
1505 void hfi1_device_remove(struct hfi1_devdata
*dd
)