2 * Char device for device raw access
4 * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include <linux/bug.h>
22 #include <linux/compat.h>
23 #include <linux/delay.h>
24 #include <linux/device.h>
25 #include <linux/errno.h>
26 #include <linux/firewire.h>
27 #include <linux/firewire-cdev.h>
28 #include <linux/idr.h>
29 #include <linux/irqflags.h>
30 #include <linux/jiffies.h>
31 #include <linux/kernel.h>
32 #include <linux/kref.h>
34 #include <linux/module.h>
35 #include <linux/mutex.h>
36 #include <linux/poll.h>
37 #include <linux/sched.h>
38 #include <linux/spinlock.h>
39 #include <linux/string.h>
40 #include <linux/time.h>
41 #include <linux/uaccess.h>
42 #include <linux/vmalloc.h>
43 #include <linux/wait.h>
44 #include <linux/workqueue.h>
46 #include <asm/system.h>
51 * ABI version history is documented in linux/firewire-cdev.h.
53 #define FW_CDEV_KERNEL_VERSION 4
54 #define FW_CDEV_VERSION_EVENT_REQUEST2 4
58 struct fw_device
*device
;
62 struct idr resource_idr
;
63 struct list_head event_list
;
64 wait_queue_head_t wait
;
65 u64 bus_reset_closure
;
67 struct fw_iso_context
*iso_context
;
69 struct fw_iso_buffer buffer
;
70 unsigned long vm_start
;
72 struct list_head phy_receiver_link
;
73 u64 phy_receiver_closure
;
75 struct list_head link
;
79 static inline void client_get(struct client
*client
)
81 kref_get(&client
->kref
);
84 static void client_release(struct kref
*kref
)
86 struct client
*client
= container_of(kref
, struct client
, kref
);
88 fw_device_put(client
->device
);
92 static void client_put(struct client
*client
)
94 kref_put(&client
->kref
, client_release
);
97 struct client_resource
;
98 typedef void (*client_resource_release_fn_t
)(struct client
*,
99 struct client_resource
*);
100 struct client_resource
{
101 client_resource_release_fn_t release
;
105 struct address_handler_resource
{
106 struct client_resource resource
;
107 struct fw_address_handler handler
;
109 struct client
*client
;
112 struct outbound_transaction_resource
{
113 struct client_resource resource
;
114 struct fw_transaction transaction
;
117 struct inbound_transaction_resource
{
118 struct client_resource resource
;
119 struct fw_card
*card
;
120 struct fw_request
*request
;
125 struct descriptor_resource
{
126 struct client_resource resource
;
127 struct fw_descriptor descriptor
;
131 struct iso_resource
{
132 struct client_resource resource
;
133 struct client
*client
;
134 /* Schedule work and access todo only with client->lock held. */
135 struct delayed_work work
;
136 enum {ISO_RES_ALLOC
, ISO_RES_REALLOC
, ISO_RES_DEALLOC
,
137 ISO_RES_ALLOC_ONCE
, ISO_RES_DEALLOC_ONCE
,} todo
;
141 __be32 transaction_data
[2];
142 struct iso_resource_event
*e_alloc
, *e_dealloc
;
145 static void release_iso_resource(struct client
*, struct client_resource
*);
147 static void schedule_iso_resource(struct iso_resource
*r
, unsigned long delay
)
149 client_get(r
->client
);
150 if (!schedule_delayed_work(&r
->work
, delay
))
151 client_put(r
->client
);
154 static void schedule_if_iso_resource(struct client_resource
*resource
)
156 if (resource
->release
== release_iso_resource
)
157 schedule_iso_resource(container_of(resource
,
158 struct iso_resource
, resource
), 0);
162 * dequeue_event() just kfree()'s the event, so the event has to be
163 * the first field in a struct XYZ_event.
166 struct { void *data
; size_t size
; } v
[2];
167 struct list_head link
;
170 struct bus_reset_event
{
172 struct fw_cdev_event_bus_reset reset
;
175 struct outbound_transaction_event
{
177 struct client
*client
;
178 struct outbound_transaction_resource r
;
179 struct fw_cdev_event_response response
;
182 struct inbound_transaction_event
{
185 struct fw_cdev_event_request request
;
186 struct fw_cdev_event_request2 request2
;
190 struct iso_interrupt_event
{
192 struct fw_cdev_event_iso_interrupt interrupt
;
195 struct iso_resource_event
{
197 struct fw_cdev_event_iso_resource iso_resource
;
200 struct outbound_phy_packet_event
{
202 struct client
*client
;
204 struct fw_cdev_event_phy_packet phy_packet
;
207 struct inbound_phy_packet_event
{
209 struct fw_cdev_event_phy_packet phy_packet
;
212 static inline void __user
*u64_to_uptr(__u64 value
)
214 return (void __user
*)(unsigned long)value
;
217 static inline __u64
uptr_to_u64(void __user
*ptr
)
219 return (__u64
)(unsigned long)ptr
;
222 static int fw_device_op_open(struct inode
*inode
, struct file
*file
)
224 struct fw_device
*device
;
225 struct client
*client
;
227 device
= fw_device_get_by_devt(inode
->i_rdev
);
231 if (fw_device_is_shutdown(device
)) {
232 fw_device_put(device
);
236 client
= kzalloc(sizeof(*client
), GFP_KERNEL
);
237 if (client
== NULL
) {
238 fw_device_put(device
);
242 client
->device
= device
;
243 spin_lock_init(&client
->lock
);
244 idr_init(&client
->resource_idr
);
245 INIT_LIST_HEAD(&client
->event_list
);
246 init_waitqueue_head(&client
->wait
);
247 INIT_LIST_HEAD(&client
->phy_receiver_link
);
248 kref_init(&client
->kref
);
250 file
->private_data
= client
;
252 mutex_lock(&device
->client_list_mutex
);
253 list_add_tail(&client
->link
, &device
->client_list
);
254 mutex_unlock(&device
->client_list_mutex
);
256 return nonseekable_open(inode
, file
);
259 static void queue_event(struct client
*client
, struct event
*event
,
260 void *data0
, size_t size0
, void *data1
, size_t size1
)
264 event
->v
[0].data
= data0
;
265 event
->v
[0].size
= size0
;
266 event
->v
[1].data
= data1
;
267 event
->v
[1].size
= size1
;
269 spin_lock_irqsave(&client
->lock
, flags
);
270 if (client
->in_shutdown
)
273 list_add_tail(&event
->link
, &client
->event_list
);
274 spin_unlock_irqrestore(&client
->lock
, flags
);
276 wake_up_interruptible(&client
->wait
);
279 static int dequeue_event(struct client
*client
,
280 char __user
*buffer
, size_t count
)
286 ret
= wait_event_interruptible(client
->wait
,
287 !list_empty(&client
->event_list
) ||
288 fw_device_is_shutdown(client
->device
));
292 if (list_empty(&client
->event_list
) &&
293 fw_device_is_shutdown(client
->device
))
296 spin_lock_irq(&client
->lock
);
297 event
= list_first_entry(&client
->event_list
, struct event
, link
);
298 list_del(&event
->link
);
299 spin_unlock_irq(&client
->lock
);
302 for (i
= 0; i
< ARRAY_SIZE(event
->v
) && total
< count
; i
++) {
303 size
= min(event
->v
[i
].size
, count
- total
);
304 if (copy_to_user(buffer
+ total
, event
->v
[i
].data
, size
)) {
318 static ssize_t
fw_device_op_read(struct file
*file
, char __user
*buffer
,
319 size_t count
, loff_t
*offset
)
321 struct client
*client
= file
->private_data
;
323 return dequeue_event(client
, buffer
, count
);
326 static void fill_bus_reset_event(struct fw_cdev_event_bus_reset
*event
,
327 struct client
*client
)
329 struct fw_card
*card
= client
->device
->card
;
331 spin_lock_irq(&card
->lock
);
333 event
->closure
= client
->bus_reset_closure
;
334 event
->type
= FW_CDEV_EVENT_BUS_RESET
;
335 event
->generation
= client
->device
->generation
;
336 event
->node_id
= client
->device
->node_id
;
337 event
->local_node_id
= card
->local_node
->node_id
;
338 event
->bm_node_id
= card
->bm_node_id
;
339 event
->irm_node_id
= card
->irm_node
->node_id
;
340 event
->root_node_id
= card
->root_node
->node_id
;
342 spin_unlock_irq(&card
->lock
);
345 static void for_each_client(struct fw_device
*device
,
346 void (*callback
)(struct client
*client
))
350 mutex_lock(&device
->client_list_mutex
);
351 list_for_each_entry(c
, &device
->client_list
, link
)
353 mutex_unlock(&device
->client_list_mutex
);
356 static int schedule_reallocations(int id
, void *p
, void *data
)
358 schedule_if_iso_resource(p
);
363 static void queue_bus_reset_event(struct client
*client
)
365 struct bus_reset_event
*e
;
367 e
= kzalloc(sizeof(*e
), GFP_KERNEL
);
369 fw_notify("Out of memory when allocating event\n");
373 fill_bus_reset_event(&e
->reset
, client
);
375 queue_event(client
, &e
->event
,
376 &e
->reset
, sizeof(e
->reset
), NULL
, 0);
378 spin_lock_irq(&client
->lock
);
379 idr_for_each(&client
->resource_idr
, schedule_reallocations
, client
);
380 spin_unlock_irq(&client
->lock
);
383 void fw_device_cdev_update(struct fw_device
*device
)
385 for_each_client(device
, queue_bus_reset_event
);
388 static void wake_up_client(struct client
*client
)
390 wake_up_interruptible(&client
->wait
);
393 void fw_device_cdev_remove(struct fw_device
*device
)
395 for_each_client(device
, wake_up_client
);
399 struct fw_cdev_get_info get_info
;
400 struct fw_cdev_send_request send_request
;
401 struct fw_cdev_allocate allocate
;
402 struct fw_cdev_deallocate deallocate
;
403 struct fw_cdev_send_response send_response
;
404 struct fw_cdev_initiate_bus_reset initiate_bus_reset
;
405 struct fw_cdev_add_descriptor add_descriptor
;
406 struct fw_cdev_remove_descriptor remove_descriptor
;
407 struct fw_cdev_create_iso_context create_iso_context
;
408 struct fw_cdev_queue_iso queue_iso
;
409 struct fw_cdev_start_iso start_iso
;
410 struct fw_cdev_stop_iso stop_iso
;
411 struct fw_cdev_get_cycle_timer get_cycle_timer
;
412 struct fw_cdev_allocate_iso_resource allocate_iso_resource
;
413 struct fw_cdev_send_stream_packet send_stream_packet
;
414 struct fw_cdev_get_cycle_timer2 get_cycle_timer2
;
415 struct fw_cdev_send_phy_packet send_phy_packet
;
416 struct fw_cdev_receive_phy_packets receive_phy_packets
;
419 static int ioctl_get_info(struct client
*client
, union ioctl_arg
*arg
)
421 struct fw_cdev_get_info
*a
= &arg
->get_info
;
422 struct fw_cdev_event_bus_reset bus_reset
;
423 unsigned long ret
= 0;
425 client
->version
= a
->version
;
426 a
->version
= FW_CDEV_KERNEL_VERSION
;
427 a
->card
= client
->device
->card
->index
;
429 down_read(&fw_device_rwsem
);
432 size_t want
= a
->rom_length
;
433 size_t have
= client
->device
->config_rom_length
* 4;
435 ret
= copy_to_user(u64_to_uptr(a
->rom
),
436 client
->device
->config_rom
, min(want
, have
));
438 a
->rom_length
= client
->device
->config_rom_length
* 4;
440 up_read(&fw_device_rwsem
);
445 client
->bus_reset_closure
= a
->bus_reset_closure
;
446 if (a
->bus_reset
!= 0) {
447 fill_bus_reset_event(&bus_reset
, client
);
448 if (copy_to_user(u64_to_uptr(a
->bus_reset
),
449 &bus_reset
, sizeof(bus_reset
)))
456 static int add_client_resource(struct client
*client
,
457 struct client_resource
*resource
, gfp_t gfp_mask
)
463 if (idr_pre_get(&client
->resource_idr
, gfp_mask
) == 0)
466 spin_lock_irqsave(&client
->lock
, flags
);
467 if (client
->in_shutdown
)
470 ret
= idr_get_new(&client
->resource_idr
, resource
,
474 schedule_if_iso_resource(resource
);
476 spin_unlock_irqrestore(&client
->lock
, flags
);
481 return ret
< 0 ? ret
: 0;
484 static int release_client_resource(struct client
*client
, u32 handle
,
485 client_resource_release_fn_t release
,
486 struct client_resource
**return_resource
)
488 struct client_resource
*resource
;
490 spin_lock_irq(&client
->lock
);
491 if (client
->in_shutdown
)
494 resource
= idr_find(&client
->resource_idr
, handle
);
495 if (resource
&& resource
->release
== release
)
496 idr_remove(&client
->resource_idr
, handle
);
497 spin_unlock_irq(&client
->lock
);
499 if (!(resource
&& resource
->release
== release
))
503 *return_resource
= resource
;
505 resource
->release(client
, resource
);
512 static void release_transaction(struct client
*client
,
513 struct client_resource
*resource
)
515 struct outbound_transaction_resource
*r
= container_of(resource
,
516 struct outbound_transaction_resource
, resource
);
518 fw_cancel_transaction(client
->device
->card
, &r
->transaction
);
521 static void complete_transaction(struct fw_card
*card
, int rcode
,
522 void *payload
, size_t length
, void *data
)
524 struct outbound_transaction_event
*e
= data
;
525 struct fw_cdev_event_response
*rsp
= &e
->response
;
526 struct client
*client
= e
->client
;
529 if (length
< rsp
->length
)
530 rsp
->length
= length
;
531 if (rcode
== RCODE_COMPLETE
)
532 memcpy(rsp
->data
, payload
, rsp
->length
);
534 spin_lock_irqsave(&client
->lock
, flags
);
536 * 1. If called while in shutdown, the idr tree must be left untouched.
537 * The idr handle will be removed and the client reference will be
539 * 2. If the call chain was release_client_resource ->
540 * release_transaction -> complete_transaction (instead of a normal
541 * conclusion of the transaction), i.e. if this resource was already
542 * unregistered from the idr, the client reference will be dropped
543 * by release_client_resource and we must not drop it here.
545 if (!client
->in_shutdown
&&
546 idr_find(&client
->resource_idr
, e
->r
.resource
.handle
)) {
547 idr_remove(&client
->resource_idr
, e
->r
.resource
.handle
);
548 /* Drop the idr's reference */
551 spin_unlock_irqrestore(&client
->lock
, flags
);
553 rsp
->type
= FW_CDEV_EVENT_RESPONSE
;
557 * In the case that sizeof(*rsp) doesn't align with the position of the
558 * data, and the read is short, preserve an extra copy of the data
559 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
560 * for short reads and some apps depended on it, this is both safe
561 * and prudent for compatibility.
563 if (rsp
->length
<= sizeof(*rsp
) - offsetof(typeof(*rsp
), data
))
564 queue_event(client
, &e
->event
, rsp
, sizeof(*rsp
),
565 rsp
->data
, rsp
->length
);
567 queue_event(client
, &e
->event
, rsp
, sizeof(*rsp
) + rsp
->length
,
570 /* Drop the transaction callback's reference */
574 static int init_request(struct client
*client
,
575 struct fw_cdev_send_request
*request
,
576 int destination_id
, int speed
)
578 struct outbound_transaction_event
*e
;
581 if (request
->tcode
!= TCODE_STREAM_DATA
&&
582 (request
->length
> 4096 || request
->length
> 512 << speed
))
585 if (request
->tcode
== TCODE_WRITE_QUADLET_REQUEST
&&
589 e
= kmalloc(sizeof(*e
) + request
->length
, GFP_KERNEL
);
594 e
->response
.length
= request
->length
;
595 e
->response
.closure
= request
->closure
;
598 copy_from_user(e
->response
.data
,
599 u64_to_uptr(request
->data
), request
->length
)) {
604 e
->r
.resource
.release
= release_transaction
;
605 ret
= add_client_resource(client
, &e
->r
.resource
, GFP_KERNEL
);
609 /* Get a reference for the transaction callback */
612 fw_send_request(client
->device
->card
, &e
->r
.transaction
,
613 request
->tcode
, destination_id
, request
->generation
,
614 speed
, request
->offset
, e
->response
.data
,
615 request
->length
, complete_transaction
, e
);
624 static int ioctl_send_request(struct client
*client
, union ioctl_arg
*arg
)
626 switch (arg
->send_request
.tcode
) {
627 case TCODE_WRITE_QUADLET_REQUEST
:
628 case TCODE_WRITE_BLOCK_REQUEST
:
629 case TCODE_READ_QUADLET_REQUEST
:
630 case TCODE_READ_BLOCK_REQUEST
:
631 case TCODE_LOCK_MASK_SWAP
:
632 case TCODE_LOCK_COMPARE_SWAP
:
633 case TCODE_LOCK_FETCH_ADD
:
634 case TCODE_LOCK_LITTLE_ADD
:
635 case TCODE_LOCK_BOUNDED_ADD
:
636 case TCODE_LOCK_WRAP_ADD
:
637 case TCODE_LOCK_VENDOR_DEPENDENT
:
643 return init_request(client
, &arg
->send_request
, client
->device
->node_id
,
644 client
->device
->max_speed
);
647 static inline bool is_fcp_request(struct fw_request
*request
)
649 return request
== NULL
;
652 static void release_request(struct client
*client
,
653 struct client_resource
*resource
)
655 struct inbound_transaction_resource
*r
= container_of(resource
,
656 struct inbound_transaction_resource
, resource
);
658 if (is_fcp_request(r
->request
))
661 fw_send_response(r
->card
, r
->request
, RCODE_CONFLICT_ERROR
);
663 fw_card_put(r
->card
);
667 static void handle_request(struct fw_card
*card
, struct fw_request
*request
,
668 int tcode
, int destination
, int source
,
669 int generation
, unsigned long long offset
,
670 void *payload
, size_t length
, void *callback_data
)
672 struct address_handler_resource
*handler
= callback_data
;
673 struct inbound_transaction_resource
*r
;
674 struct inbound_transaction_event
*e
;
676 void *fcp_frame
= NULL
;
679 /* card may be different from handler->client->device->card */
682 r
= kmalloc(sizeof(*r
), GFP_ATOMIC
);
683 e
= kmalloc(sizeof(*e
), GFP_ATOMIC
);
684 if (r
== NULL
|| e
== NULL
) {
685 fw_notify("Out of memory when allocating event\n");
689 r
->request
= request
;
693 if (is_fcp_request(request
)) {
695 * FIXME: Let core-transaction.c manage a
696 * single reference-counted copy?
698 fcp_frame
= kmemdup(payload
, length
, GFP_ATOMIC
);
699 if (fcp_frame
== NULL
)
705 r
->resource
.release
= release_request
;
706 ret
= add_client_resource(handler
->client
, &r
->resource
, GFP_ATOMIC
);
710 if (handler
->client
->version
< FW_CDEV_VERSION_EVENT_REQUEST2
) {
711 struct fw_cdev_event_request
*req
= &e
->req
.request
;
714 tcode
= TCODE_LOCK_REQUEST
;
716 req
->type
= FW_CDEV_EVENT_REQUEST
;
718 req
->offset
= offset
;
719 req
->length
= length
;
720 req
->handle
= r
->resource
.handle
;
721 req
->closure
= handler
->closure
;
722 event_size0
= sizeof(*req
);
724 struct fw_cdev_event_request2
*req
= &e
->req
.request2
;
726 req
->type
= FW_CDEV_EVENT_REQUEST2
;
728 req
->offset
= offset
;
729 req
->source_node_id
= source
;
730 req
->destination_node_id
= destination
;
731 req
->card
= card
->index
;
732 req
->generation
= generation
;
733 req
->length
= length
;
734 req
->handle
= r
->resource
.handle
;
735 req
->closure
= handler
->closure
;
736 event_size0
= sizeof(*req
);
739 queue_event(handler
->client
, &e
->event
,
740 &e
->req
, event_size0
, r
->data
, length
);
748 if (!is_fcp_request(request
))
749 fw_send_response(card
, request
, RCODE_CONFLICT_ERROR
);
754 static void release_address_handler(struct client
*client
,
755 struct client_resource
*resource
)
757 struct address_handler_resource
*r
=
758 container_of(resource
, struct address_handler_resource
, resource
);
760 fw_core_remove_address_handler(&r
->handler
);
764 static int ioctl_allocate(struct client
*client
, union ioctl_arg
*arg
)
766 struct fw_cdev_allocate
*a
= &arg
->allocate
;
767 struct address_handler_resource
*r
;
768 struct fw_address_region region
;
771 r
= kmalloc(sizeof(*r
), GFP_KERNEL
);
775 region
.start
= a
->offset
;
776 region
.end
= a
->offset
+ a
->length
;
777 r
->handler
.length
= a
->length
;
778 r
->handler
.address_callback
= handle_request
;
779 r
->handler
.callback_data
= r
;
780 r
->closure
= a
->closure
;
783 ret
= fw_core_add_address_handler(&r
->handler
, ®ion
);
789 r
->resource
.release
= release_address_handler
;
790 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
792 release_address_handler(client
, &r
->resource
);
795 a
->handle
= r
->resource
.handle
;
800 static int ioctl_deallocate(struct client
*client
, union ioctl_arg
*arg
)
802 return release_client_resource(client
, arg
->deallocate
.handle
,
803 release_address_handler
, NULL
);
806 static int ioctl_send_response(struct client
*client
, union ioctl_arg
*arg
)
808 struct fw_cdev_send_response
*a
= &arg
->send_response
;
809 struct client_resource
*resource
;
810 struct inbound_transaction_resource
*r
;
813 if (release_client_resource(client
, a
->handle
,
814 release_request
, &resource
) < 0)
817 r
= container_of(resource
, struct inbound_transaction_resource
,
819 if (is_fcp_request(r
->request
))
822 if (a
->length
!= fw_get_response_length(r
->request
)) {
827 if (copy_from_user(r
->data
, u64_to_uptr(a
->data
), a
->length
)) {
832 fw_send_response(r
->card
, r
->request
, a
->rcode
);
834 fw_card_put(r
->card
);
840 static int ioctl_initiate_bus_reset(struct client
*client
, union ioctl_arg
*arg
)
842 fw_schedule_bus_reset(client
->device
->card
, true,
843 arg
->initiate_bus_reset
.type
== FW_CDEV_SHORT_RESET
);
847 static void release_descriptor(struct client
*client
,
848 struct client_resource
*resource
)
850 struct descriptor_resource
*r
=
851 container_of(resource
, struct descriptor_resource
, resource
);
853 fw_core_remove_descriptor(&r
->descriptor
);
857 static int ioctl_add_descriptor(struct client
*client
, union ioctl_arg
*arg
)
859 struct fw_cdev_add_descriptor
*a
= &arg
->add_descriptor
;
860 struct descriptor_resource
*r
;
863 /* Access policy: Allow this ioctl only on local nodes' device files. */
864 if (!client
->device
->is_local
)
870 r
= kmalloc(sizeof(*r
) + a
->length
* 4, GFP_KERNEL
);
874 if (copy_from_user(r
->data
, u64_to_uptr(a
->data
), a
->length
* 4)) {
879 r
->descriptor
.length
= a
->length
;
880 r
->descriptor
.immediate
= a
->immediate
;
881 r
->descriptor
.key
= a
->key
;
882 r
->descriptor
.data
= r
->data
;
884 ret
= fw_core_add_descriptor(&r
->descriptor
);
888 r
->resource
.release
= release_descriptor
;
889 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
891 fw_core_remove_descriptor(&r
->descriptor
);
894 a
->handle
= r
->resource
.handle
;
903 static int ioctl_remove_descriptor(struct client
*client
, union ioctl_arg
*arg
)
905 return release_client_resource(client
, arg
->remove_descriptor
.handle
,
906 release_descriptor
, NULL
);
909 static void iso_callback(struct fw_iso_context
*context
, u32 cycle
,
910 size_t header_length
, void *header
, void *data
)
912 struct client
*client
= data
;
913 struct iso_interrupt_event
*e
;
915 e
= kmalloc(sizeof(*e
) + header_length
, GFP_ATOMIC
);
917 fw_notify("Out of memory when allocating event\n");
920 e
->interrupt
.type
= FW_CDEV_EVENT_ISO_INTERRUPT
;
921 e
->interrupt
.closure
= client
->iso_closure
;
922 e
->interrupt
.cycle
= cycle
;
923 e
->interrupt
.header_length
= header_length
;
924 memcpy(e
->interrupt
.header
, header
, header_length
);
925 queue_event(client
, &e
->event
, &e
->interrupt
,
926 sizeof(e
->interrupt
) + header_length
, NULL
, 0);
929 static int ioctl_create_iso_context(struct client
*client
, union ioctl_arg
*arg
)
931 struct fw_cdev_create_iso_context
*a
= &arg
->create_iso_context
;
932 struct fw_iso_context
*context
;
934 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT
!= FW_ISO_CONTEXT_TRANSMIT
||
935 FW_CDEV_ISO_CONTEXT_RECEIVE
!= FW_ISO_CONTEXT_RECEIVE
);
941 case FW_ISO_CONTEXT_RECEIVE
:
942 if (a
->header_size
< 4 || (a
->header_size
& 3))
946 case FW_ISO_CONTEXT_TRANSMIT
:
947 if (a
->speed
> SCODE_3200
)
955 context
= fw_iso_context_create(client
->device
->card
, a
->type
,
956 a
->channel
, a
->speed
, a
->header_size
,
957 iso_callback
, client
);
959 return PTR_ERR(context
);
961 /* We only support one context at this time. */
962 spin_lock_irq(&client
->lock
);
963 if (client
->iso_context
!= NULL
) {
964 spin_unlock_irq(&client
->lock
);
965 fw_iso_context_destroy(context
);
968 client
->iso_closure
= a
->closure
;
969 client
->iso_context
= context
;
970 spin_unlock_irq(&client
->lock
);
977 /* Macros for decoding the iso packet control header. */
978 #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
979 #define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
980 #define GET_SKIP(v) (((v) >> 17) & 0x01)
981 #define GET_TAG(v) (((v) >> 18) & 0x03)
982 #define GET_SY(v) (((v) >> 20) & 0x0f)
983 #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
985 static int ioctl_queue_iso(struct client
*client
, union ioctl_arg
*arg
)
987 struct fw_cdev_queue_iso
*a
= &arg
->queue_iso
;
988 struct fw_cdev_iso_packet __user
*p
, *end
, *next
;
989 struct fw_iso_context
*ctx
= client
->iso_context
;
990 unsigned long payload
, buffer_end
, header_length
;
994 struct fw_iso_packet packet
;
998 if (ctx
== NULL
|| a
->handle
!= 0)
1002 * If the user passes a non-NULL data pointer, has mmap()'ed
1003 * the iso buffer, and the pointer points inside the buffer,
1004 * we setup the payload pointers accordingly. Otherwise we
1005 * set them both to 0, which will still let packets with
1006 * payload_length == 0 through. In other words, if no packets
1007 * use the indirect payload, the iso buffer need not be mapped
1008 * and the a->data pointer is ignored.
1011 payload
= (unsigned long)a
->data
- client
->vm_start
;
1012 buffer_end
= client
->buffer
.page_count
<< PAGE_SHIFT
;
1013 if (a
->data
== 0 || client
->buffer
.pages
== NULL
||
1014 payload
>= buffer_end
) {
1019 p
= (struct fw_cdev_iso_packet __user
*)u64_to_uptr(a
->packets
);
1021 if (!access_ok(VERIFY_READ
, p
, a
->size
))
1024 end
= (void __user
*)p
+ a
->size
;
1027 if (get_user(control
, &p
->control
))
1029 u
.packet
.payload_length
= GET_PAYLOAD_LENGTH(control
);
1030 u
.packet
.interrupt
= GET_INTERRUPT(control
);
1031 u
.packet
.skip
= GET_SKIP(control
);
1032 u
.packet
.tag
= GET_TAG(control
);
1033 u
.packet
.sy
= GET_SY(control
);
1034 u
.packet
.header_length
= GET_HEADER_LENGTH(control
);
1036 if (ctx
->type
== FW_ISO_CONTEXT_TRANSMIT
) {
1037 if (u
.packet
.header_length
% 4 != 0)
1039 header_length
= u
.packet
.header_length
;
1042 * We require that header_length is a multiple of
1043 * the fixed header size, ctx->header_size.
1045 if (ctx
->header_size
== 0) {
1046 if (u
.packet
.header_length
> 0)
1048 } else if (u
.packet
.header_length
== 0 ||
1049 u
.packet
.header_length
% ctx
->header_size
!= 0) {
1055 next
= (struct fw_cdev_iso_packet __user
*)
1056 &p
->header
[header_length
/ 4];
1059 if (__copy_from_user
1060 (u
.packet
.header
, p
->header
, header_length
))
1062 if (u
.packet
.skip
&& ctx
->type
== FW_ISO_CONTEXT_TRANSMIT
&&
1063 u
.packet
.header_length
+ u
.packet
.payload_length
> 0)
1065 if (payload
+ u
.packet
.payload_length
> buffer_end
)
1068 if (fw_iso_context_queue(ctx
, &u
.packet
,
1069 &client
->buffer
, payload
))
1073 payload
+= u
.packet
.payload_length
;
1077 a
->size
-= uptr_to_u64(p
) - a
->packets
;
1078 a
->packets
= uptr_to_u64(p
);
1079 a
->data
= client
->vm_start
+ payload
;
1084 static int ioctl_start_iso(struct client
*client
, union ioctl_arg
*arg
)
1086 struct fw_cdev_start_iso
*a
= &arg
->start_iso
;
1089 FW_CDEV_ISO_CONTEXT_MATCH_TAG0
!= FW_ISO_CONTEXT_MATCH_TAG0
||
1090 FW_CDEV_ISO_CONTEXT_MATCH_TAG1
!= FW_ISO_CONTEXT_MATCH_TAG1
||
1091 FW_CDEV_ISO_CONTEXT_MATCH_TAG2
!= FW_ISO_CONTEXT_MATCH_TAG2
||
1092 FW_CDEV_ISO_CONTEXT_MATCH_TAG3
!= FW_ISO_CONTEXT_MATCH_TAG3
||
1093 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS
!= FW_ISO_CONTEXT_MATCH_ALL_TAGS
);
1095 if (client
->iso_context
== NULL
|| a
->handle
!= 0)
1098 if (client
->iso_context
->type
== FW_ISO_CONTEXT_RECEIVE
&&
1099 (a
->tags
== 0 || a
->tags
> 15 || a
->sync
> 15))
1102 return fw_iso_context_start(client
->iso_context
,
1103 a
->cycle
, a
->sync
, a
->tags
);
1106 static int ioctl_stop_iso(struct client
*client
, union ioctl_arg
*arg
)
1108 struct fw_cdev_stop_iso
*a
= &arg
->stop_iso
;
1110 if (client
->iso_context
== NULL
|| a
->handle
!= 0)
1113 return fw_iso_context_stop(client
->iso_context
);
1116 static int ioctl_get_cycle_timer2(struct client
*client
, union ioctl_arg
*arg
)
1118 struct fw_cdev_get_cycle_timer2
*a
= &arg
->get_cycle_timer2
;
1119 struct fw_card
*card
= client
->device
->card
;
1120 struct timespec ts
= {0, 0};
1124 local_irq_disable();
1126 cycle_time
= card
->driver
->read_csr(card
, CSR_CYCLE_TIME
);
1128 switch (a
->clk_id
) {
1129 case CLOCK_REALTIME
: getnstimeofday(&ts
); break;
1130 case CLOCK_MONOTONIC
: do_posix_clock_monotonic_gettime(&ts
); break;
1131 case CLOCK_MONOTONIC_RAW
: getrawmonotonic(&ts
); break;
1138 a
->tv_sec
= ts
.tv_sec
;
1139 a
->tv_nsec
= ts
.tv_nsec
;
1140 a
->cycle_timer
= cycle_time
;
1145 static int ioctl_get_cycle_timer(struct client
*client
, union ioctl_arg
*arg
)
1147 struct fw_cdev_get_cycle_timer
*a
= &arg
->get_cycle_timer
;
1148 struct fw_cdev_get_cycle_timer2 ct2
;
1150 ct2
.clk_id
= CLOCK_REALTIME
;
1151 ioctl_get_cycle_timer2(client
, (union ioctl_arg
*)&ct2
);
1153 a
->local_time
= ct2
.tv_sec
* USEC_PER_SEC
+ ct2
.tv_nsec
/ NSEC_PER_USEC
;
1154 a
->cycle_timer
= ct2
.cycle_timer
;
1159 static void iso_resource_work(struct work_struct
*work
)
1161 struct iso_resource_event
*e
;
1162 struct iso_resource
*r
=
1163 container_of(work
, struct iso_resource
, work
.work
);
1164 struct client
*client
= r
->client
;
1165 int generation
, channel
, bandwidth
, todo
;
1166 bool skip
, free
, success
;
1168 spin_lock_irq(&client
->lock
);
1169 generation
= client
->device
->generation
;
1171 /* Allow 1000ms grace period for other reallocations. */
1172 if (todo
== ISO_RES_ALLOC
&&
1173 time_is_after_jiffies(client
->device
->card
->reset_jiffies
+ HZ
)) {
1174 schedule_iso_resource(r
, DIV_ROUND_UP(HZ
, 3));
1177 /* We could be called twice within the same generation. */
1178 skip
= todo
== ISO_RES_REALLOC
&&
1179 r
->generation
== generation
;
1181 free
= todo
== ISO_RES_DEALLOC
||
1182 todo
== ISO_RES_ALLOC_ONCE
||
1183 todo
== ISO_RES_DEALLOC_ONCE
;
1184 r
->generation
= generation
;
1185 spin_unlock_irq(&client
->lock
);
1190 bandwidth
= r
->bandwidth
;
1192 fw_iso_resource_manage(client
->device
->card
, generation
,
1193 r
->channels
, &channel
, &bandwidth
,
1194 todo
== ISO_RES_ALLOC
||
1195 todo
== ISO_RES_REALLOC
||
1196 todo
== ISO_RES_ALLOC_ONCE
,
1197 r
->transaction_data
);
1199 * Is this generation outdated already? As long as this resource sticks
1200 * in the idr, it will be scheduled again for a newer generation or at
1203 if (channel
== -EAGAIN
&&
1204 (todo
== ISO_RES_ALLOC
|| todo
== ISO_RES_REALLOC
))
1207 success
= channel
>= 0 || bandwidth
> 0;
1209 spin_lock_irq(&client
->lock
);
1211 * Transit from allocation to reallocation, except if the client
1212 * requested deallocation in the meantime.
1214 if (r
->todo
== ISO_RES_ALLOC
)
1215 r
->todo
= ISO_RES_REALLOC
;
1217 * Allocation or reallocation failure? Pull this resource out of the
1218 * idr and prepare for deletion, unless the client is shutting down.
1220 if (r
->todo
== ISO_RES_REALLOC
&& !success
&&
1221 !client
->in_shutdown
&&
1222 idr_find(&client
->resource_idr
, r
->resource
.handle
)) {
1223 idr_remove(&client
->resource_idr
, r
->resource
.handle
);
1227 spin_unlock_irq(&client
->lock
);
1229 if (todo
== ISO_RES_ALLOC
&& channel
>= 0)
1230 r
->channels
= 1ULL << channel
;
1232 if (todo
== ISO_RES_REALLOC
&& success
)
1235 if (todo
== ISO_RES_ALLOC
|| todo
== ISO_RES_ALLOC_ONCE
) {
1240 r
->e_dealloc
= NULL
;
1242 e
->iso_resource
.handle
= r
->resource
.handle
;
1243 e
->iso_resource
.channel
= channel
;
1244 e
->iso_resource
.bandwidth
= bandwidth
;
1246 queue_event(client
, &e
->event
,
1247 &e
->iso_resource
, sizeof(e
->iso_resource
), NULL
, 0);
1250 cancel_delayed_work(&r
->work
);
1252 kfree(r
->e_dealloc
);
1259 static void release_iso_resource(struct client
*client
,
1260 struct client_resource
*resource
)
1262 struct iso_resource
*r
=
1263 container_of(resource
, struct iso_resource
, resource
);
1265 spin_lock_irq(&client
->lock
);
1266 r
->todo
= ISO_RES_DEALLOC
;
1267 schedule_iso_resource(r
, 0);
1268 spin_unlock_irq(&client
->lock
);
1271 static int init_iso_resource(struct client
*client
,
1272 struct fw_cdev_allocate_iso_resource
*request
, int todo
)
1274 struct iso_resource_event
*e1
, *e2
;
1275 struct iso_resource
*r
;
1278 if ((request
->channels
== 0 && request
->bandwidth
== 0) ||
1279 request
->bandwidth
> BANDWIDTH_AVAILABLE_INITIAL
||
1280 request
->bandwidth
< 0)
1283 r
= kmalloc(sizeof(*r
), GFP_KERNEL
);
1284 e1
= kmalloc(sizeof(*e1
), GFP_KERNEL
);
1285 e2
= kmalloc(sizeof(*e2
), GFP_KERNEL
);
1286 if (r
== NULL
|| e1
== NULL
|| e2
== NULL
) {
1291 INIT_DELAYED_WORK(&r
->work
, iso_resource_work
);
1295 r
->channels
= request
->channels
;
1296 r
->bandwidth
= request
->bandwidth
;
1300 e1
->iso_resource
.closure
= request
->closure
;
1301 e1
->iso_resource
.type
= FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED
;
1302 e2
->iso_resource
.closure
= request
->closure
;
1303 e2
->iso_resource
.type
= FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED
;
1305 if (todo
== ISO_RES_ALLOC
) {
1306 r
->resource
.release
= release_iso_resource
;
1307 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
1311 r
->resource
.release
= NULL
;
1312 r
->resource
.handle
= -1;
1313 schedule_iso_resource(r
, 0);
1315 request
->handle
= r
->resource
.handle
;
1326 static int ioctl_allocate_iso_resource(struct client
*client
,
1327 union ioctl_arg
*arg
)
1329 return init_iso_resource(client
,
1330 &arg
->allocate_iso_resource
, ISO_RES_ALLOC
);
1333 static int ioctl_deallocate_iso_resource(struct client
*client
,
1334 union ioctl_arg
*arg
)
1336 return release_client_resource(client
,
1337 arg
->deallocate
.handle
, release_iso_resource
, NULL
);
1340 static int ioctl_allocate_iso_resource_once(struct client
*client
,
1341 union ioctl_arg
*arg
)
1343 return init_iso_resource(client
,
1344 &arg
->allocate_iso_resource
, ISO_RES_ALLOC_ONCE
);
1347 static int ioctl_deallocate_iso_resource_once(struct client
*client
,
1348 union ioctl_arg
*arg
)
1350 return init_iso_resource(client
,
1351 &arg
->allocate_iso_resource
, ISO_RES_DEALLOC_ONCE
);
1355 * Returns a speed code: Maximum speed to or from this device,
1356 * limited by the device's link speed, the local node's link speed,
1357 * and all PHY port speeds between the two links.
1359 static int ioctl_get_speed(struct client
*client
, union ioctl_arg
*arg
)
1361 return client
->device
->max_speed
;
1364 static int ioctl_send_broadcast_request(struct client
*client
,
1365 union ioctl_arg
*arg
)
1367 struct fw_cdev_send_request
*a
= &arg
->send_request
;
1370 case TCODE_WRITE_QUADLET_REQUEST
:
1371 case TCODE_WRITE_BLOCK_REQUEST
:
1377 /* Security policy: Only allow accesses to Units Space. */
1378 if (a
->offset
< CSR_REGISTER_BASE
+ CSR_CONFIG_ROM_END
)
1381 return init_request(client
, a
, LOCAL_BUS
| 0x3f, SCODE_100
);
1384 static int ioctl_send_stream_packet(struct client
*client
, union ioctl_arg
*arg
)
1386 struct fw_cdev_send_stream_packet
*a
= &arg
->send_stream_packet
;
1387 struct fw_cdev_send_request request
;
1390 if (a
->speed
> client
->device
->card
->link_speed
||
1391 a
->length
> 1024 << a
->speed
)
1394 if (a
->tag
> 3 || a
->channel
> 63 || a
->sy
> 15)
1397 dest
= fw_stream_packet_destination_id(a
->tag
, a
->channel
, a
->sy
);
1398 request
.tcode
= TCODE_STREAM_DATA
;
1399 request
.length
= a
->length
;
1400 request
.closure
= a
->closure
;
1401 request
.data
= a
->data
;
1402 request
.generation
= a
->generation
;
1404 return init_request(client
, &request
, dest
, a
->speed
);
1407 static void outbound_phy_packet_callback(struct fw_packet
*packet
,
1408 struct fw_card
*card
, int status
)
1410 struct outbound_phy_packet_event
*e
=
1411 container_of(packet
, struct outbound_phy_packet_event
, p
);
1415 case ACK_COMPLETE
: e
->phy_packet
.rcode
= RCODE_COMPLETE
; break;
1416 /* should never happen with PHY packets: */
1417 case ACK_PENDING
: e
->phy_packet
.rcode
= RCODE_COMPLETE
; break;
1420 case ACK_BUSY_B
: e
->phy_packet
.rcode
= RCODE_BUSY
; break;
1421 case ACK_DATA_ERROR
: e
->phy_packet
.rcode
= RCODE_DATA_ERROR
; break;
1422 case ACK_TYPE_ERROR
: e
->phy_packet
.rcode
= RCODE_TYPE_ERROR
; break;
1423 /* stale generation; cancelled; on certain controllers: no ack */
1424 default: e
->phy_packet
.rcode
= status
; break;
1427 queue_event(e
->client
, &e
->event
,
1428 &e
->phy_packet
, sizeof(e
->phy_packet
), NULL
, 0);
1429 client_put(e
->client
);
1432 static int ioctl_send_phy_packet(struct client
*client
, union ioctl_arg
*arg
)
1434 struct fw_cdev_send_phy_packet
*a
= &arg
->send_phy_packet
;
1435 struct fw_card
*card
= client
->device
->card
;
1436 struct outbound_phy_packet_event
*e
;
1438 /* Access policy: Allow this ioctl only on local nodes' device files. */
1439 if (!client
->device
->is_local
)
1442 e
= kzalloc(sizeof(*e
), GFP_KERNEL
);
1448 e
->p
.speed
= SCODE_100
;
1449 e
->p
.generation
= a
->generation
;
1450 e
->p
.header
[0] = a
->data
[0];
1451 e
->p
.header
[1] = a
->data
[1];
1452 e
->p
.header_length
= 8;
1453 e
->p
.callback
= outbound_phy_packet_callback
;
1454 e
->phy_packet
.closure
= a
->closure
;
1455 e
->phy_packet
.type
= FW_CDEV_EVENT_PHY_PACKET_SENT
;
1457 card
->driver
->send_request(card
, &e
->p
);
1462 static int ioctl_receive_phy_packets(struct client
*client
, union ioctl_arg
*arg
)
1464 struct fw_cdev_receive_phy_packets
*a
= &arg
->receive_phy_packets
;
1465 struct fw_card
*card
= client
->device
->card
;
1467 /* Access policy: Allow this ioctl only on local nodes' device files. */
1468 if (!client
->device
->is_local
)
1471 spin_lock_irq(&card
->lock
);
1473 list_move_tail(&client
->phy_receiver_link
, &card
->phy_receiver_list
);
1474 client
->phy_receiver_closure
= a
->closure
;
1476 spin_unlock_irq(&card
->lock
);
1481 void fw_cdev_handle_phy_packet(struct fw_card
*card
, struct fw_packet
*p
)
1483 struct client
*client
;
1484 struct inbound_phy_packet_event
*e
;
1485 unsigned long flags
;
1487 spin_lock_irqsave(&card
->lock
, flags
);
1489 list_for_each_entry(client
, &card
->phy_receiver_list
, phy_receiver_link
) {
1490 e
= kmalloc(sizeof(*e
) + 8, GFP_ATOMIC
);
1492 fw_notify("Out of memory when allocating event\n");
1495 e
->phy_packet
.closure
= client
->phy_receiver_closure
;
1496 e
->phy_packet
.type
= FW_CDEV_EVENT_PHY_PACKET_RECEIVED
;
1497 e
->phy_packet
.rcode
= RCODE_COMPLETE
;
1498 e
->phy_packet
.length
= 8;
1499 e
->phy_packet
.data
[0] = p
->header
[1];
1500 e
->phy_packet
.data
[1] = p
->header
[2];
1501 queue_event(client
, &e
->event
,
1502 &e
->phy_packet
, sizeof(e
->phy_packet
) + 8, NULL
, 0);
1505 spin_unlock_irqrestore(&card
->lock
, flags
);
1508 static int (* const ioctl_handlers
[])(struct client
*, union ioctl_arg
*) = {
1509 [0x00] = ioctl_get_info
,
1510 [0x01] = ioctl_send_request
,
1511 [0x02] = ioctl_allocate
,
1512 [0x03] = ioctl_deallocate
,
1513 [0x04] = ioctl_send_response
,
1514 [0x05] = ioctl_initiate_bus_reset
,
1515 [0x06] = ioctl_add_descriptor
,
1516 [0x07] = ioctl_remove_descriptor
,
1517 [0x08] = ioctl_create_iso_context
,
1518 [0x09] = ioctl_queue_iso
,
1519 [0x0a] = ioctl_start_iso
,
1520 [0x0b] = ioctl_stop_iso
,
1521 [0x0c] = ioctl_get_cycle_timer
,
1522 [0x0d] = ioctl_allocate_iso_resource
,
1523 [0x0e] = ioctl_deallocate_iso_resource
,
1524 [0x0f] = ioctl_allocate_iso_resource_once
,
1525 [0x10] = ioctl_deallocate_iso_resource_once
,
1526 [0x11] = ioctl_get_speed
,
1527 [0x12] = ioctl_send_broadcast_request
,
1528 [0x13] = ioctl_send_stream_packet
,
1529 [0x14] = ioctl_get_cycle_timer2
,
1530 [0x15] = ioctl_send_phy_packet
,
1531 [0x16] = ioctl_receive_phy_packets
,
1534 static int dispatch_ioctl(struct client
*client
,
1535 unsigned int cmd
, void __user
*arg
)
1537 union ioctl_arg buffer
;
1540 if (fw_device_is_shutdown(client
->device
))
1543 if (_IOC_TYPE(cmd
) != '#' ||
1544 _IOC_NR(cmd
) >= ARRAY_SIZE(ioctl_handlers
) ||
1545 _IOC_SIZE(cmd
) > sizeof(buffer
))
1548 if (_IOC_DIR(cmd
) == _IOC_READ
)
1549 memset(&buffer
, 0, _IOC_SIZE(cmd
));
1551 if (_IOC_DIR(cmd
) & _IOC_WRITE
)
1552 if (copy_from_user(&buffer
, arg
, _IOC_SIZE(cmd
)))
1555 ret
= ioctl_handlers
[_IOC_NR(cmd
)](client
, &buffer
);
1559 if (_IOC_DIR(cmd
) & _IOC_READ
)
1560 if (copy_to_user(arg
, &buffer
, _IOC_SIZE(cmd
)))
1566 static long fw_device_op_ioctl(struct file
*file
,
1567 unsigned int cmd
, unsigned long arg
)
1569 return dispatch_ioctl(file
->private_data
, cmd
, (void __user
*)arg
);
1572 #ifdef CONFIG_COMPAT
1573 static long fw_device_op_compat_ioctl(struct file
*file
,
1574 unsigned int cmd
, unsigned long arg
)
1576 return dispatch_ioctl(file
->private_data
, cmd
, compat_ptr(arg
));
1580 static int fw_device_op_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1582 struct client
*client
= file
->private_data
;
1583 enum dma_data_direction direction
;
1585 int page_count
, ret
;
1587 if (fw_device_is_shutdown(client
->device
))
1590 /* FIXME: We could support multiple buffers, but we don't. */
1591 if (client
->buffer
.pages
!= NULL
)
1594 if (!(vma
->vm_flags
& VM_SHARED
))
1597 if (vma
->vm_start
& ~PAGE_MASK
)
1600 client
->vm_start
= vma
->vm_start
;
1601 size
= vma
->vm_end
- vma
->vm_start
;
1602 page_count
= size
>> PAGE_SHIFT
;
1603 if (size
& ~PAGE_MASK
)
1606 if (vma
->vm_flags
& VM_WRITE
)
1607 direction
= DMA_TO_DEVICE
;
1609 direction
= DMA_FROM_DEVICE
;
1611 ret
= fw_iso_buffer_init(&client
->buffer
, client
->device
->card
,
1612 page_count
, direction
);
1616 ret
= fw_iso_buffer_map(&client
->buffer
, vma
);
1618 fw_iso_buffer_destroy(&client
->buffer
, client
->device
->card
);
1623 static int shutdown_resource(int id
, void *p
, void *data
)
1625 struct client_resource
*resource
= p
;
1626 struct client
*client
= data
;
1628 resource
->release(client
, resource
);
1634 static int fw_device_op_release(struct inode
*inode
, struct file
*file
)
1636 struct client
*client
= file
->private_data
;
1637 struct event
*event
, *next_event
;
1639 spin_lock_irq(&client
->device
->card
->lock
);
1640 list_del(&client
->phy_receiver_link
);
1641 spin_unlock_irq(&client
->device
->card
->lock
);
1643 mutex_lock(&client
->device
->client_list_mutex
);
1644 list_del(&client
->link
);
1645 mutex_unlock(&client
->device
->client_list_mutex
);
1647 if (client
->iso_context
)
1648 fw_iso_context_destroy(client
->iso_context
);
1650 if (client
->buffer
.pages
)
1651 fw_iso_buffer_destroy(&client
->buffer
, client
->device
->card
);
1653 /* Freeze client->resource_idr and client->event_list */
1654 spin_lock_irq(&client
->lock
);
1655 client
->in_shutdown
= true;
1656 spin_unlock_irq(&client
->lock
);
1658 idr_for_each(&client
->resource_idr
, shutdown_resource
, client
);
1659 idr_remove_all(&client
->resource_idr
);
1660 idr_destroy(&client
->resource_idr
);
1662 list_for_each_entry_safe(event
, next_event
, &client
->event_list
, link
)
1670 static unsigned int fw_device_op_poll(struct file
*file
, poll_table
* pt
)
1672 struct client
*client
= file
->private_data
;
1673 unsigned int mask
= 0;
1675 poll_wait(file
, &client
->wait
, pt
);
1677 if (fw_device_is_shutdown(client
->device
))
1678 mask
|= POLLHUP
| POLLERR
;
1679 if (!list_empty(&client
->event_list
))
1680 mask
|= POLLIN
| POLLRDNORM
;
1685 const struct file_operations fw_device_ops
= {
1686 .owner
= THIS_MODULE
,
1687 .llseek
= no_llseek
,
1688 .open
= fw_device_op_open
,
1689 .read
= fw_device_op_read
,
1690 .unlocked_ioctl
= fw_device_op_ioctl
,
1691 .mmap
= fw_device_op_mmap
,
1692 .release
= fw_device_op_release
,
1693 .poll
= fw_device_op_poll
,
1694 #ifdef CONFIG_COMPAT
1695 .compat_ioctl
= fw_device_op_compat_ioctl
,