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> /* required for linux/wait.h */
38 #include <linux/slab.h>
39 #include <linux/spinlock.h>
40 #include <linux/string.h>
41 #include <linux/time.h>
42 #include <linux/uaccess.h>
43 #include <linux/vmalloc.h>
44 #include <linux/wait.h>
45 #include <linux/workqueue.h>
47 #include <asm/system.h>
52 * ABI version history is documented in linux/firewire-cdev.h.
54 #define FW_CDEV_KERNEL_VERSION 4
55 #define FW_CDEV_VERSION_EVENT_REQUEST2 4
56 #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4
60 struct fw_device
*device
;
64 struct idr resource_idr
;
65 struct list_head event_list
;
66 wait_queue_head_t wait
;
67 wait_queue_head_t tx_flush_wait
;
68 u64 bus_reset_closure
;
70 struct fw_iso_context
*iso_context
;
72 struct fw_iso_buffer buffer
;
73 unsigned long vm_start
;
75 struct list_head phy_receiver_link
;
76 u64 phy_receiver_closure
;
78 struct list_head link
;
82 static inline void client_get(struct client
*client
)
84 kref_get(&client
->kref
);
87 static void client_release(struct kref
*kref
)
89 struct client
*client
= container_of(kref
, struct client
, kref
);
91 fw_device_put(client
->device
);
95 static void client_put(struct client
*client
)
97 kref_put(&client
->kref
, client_release
);
100 struct client_resource
;
101 typedef void (*client_resource_release_fn_t
)(struct client
*,
102 struct client_resource
*);
103 struct client_resource
{
104 client_resource_release_fn_t release
;
108 struct address_handler_resource
{
109 struct client_resource resource
;
110 struct fw_address_handler handler
;
112 struct client
*client
;
115 struct outbound_transaction_resource
{
116 struct client_resource resource
;
117 struct fw_transaction transaction
;
120 struct inbound_transaction_resource
{
121 struct client_resource resource
;
122 struct fw_card
*card
;
123 struct fw_request
*request
;
128 struct descriptor_resource
{
129 struct client_resource resource
;
130 struct fw_descriptor descriptor
;
134 struct iso_resource
{
135 struct client_resource resource
;
136 struct client
*client
;
137 /* Schedule work and access todo only with client->lock held. */
138 struct delayed_work work
;
139 enum {ISO_RES_ALLOC
, ISO_RES_REALLOC
, ISO_RES_DEALLOC
,
140 ISO_RES_ALLOC_ONCE
, ISO_RES_DEALLOC_ONCE
,} todo
;
144 struct iso_resource_event
*e_alloc
, *e_dealloc
;
147 static void release_iso_resource(struct client
*, struct client_resource
*);
149 static void schedule_iso_resource(struct iso_resource
*r
, unsigned long delay
)
151 client_get(r
->client
);
152 if (!queue_delayed_work(fw_workqueue
, &r
->work
, delay
))
153 client_put(r
->client
);
156 static void schedule_if_iso_resource(struct client_resource
*resource
)
158 if (resource
->release
== release_iso_resource
)
159 schedule_iso_resource(container_of(resource
,
160 struct iso_resource
, resource
), 0);
164 * dequeue_event() just kfree()'s the event, so the event has to be
165 * the first field in a struct XYZ_event.
168 struct { void *data
; size_t size
; } v
[2];
169 struct list_head link
;
172 struct bus_reset_event
{
174 struct fw_cdev_event_bus_reset reset
;
177 struct outbound_transaction_event
{
179 struct client
*client
;
180 struct outbound_transaction_resource r
;
181 struct fw_cdev_event_response response
;
184 struct inbound_transaction_event
{
187 struct fw_cdev_event_request request
;
188 struct fw_cdev_event_request2 request2
;
192 struct iso_interrupt_event
{
194 struct fw_cdev_event_iso_interrupt interrupt
;
197 struct iso_interrupt_mc_event
{
199 struct fw_cdev_event_iso_interrupt_mc interrupt
;
202 struct iso_resource_event
{
204 struct fw_cdev_event_iso_resource iso_resource
;
207 struct outbound_phy_packet_event
{
209 struct client
*client
;
211 struct fw_cdev_event_phy_packet phy_packet
;
214 struct inbound_phy_packet_event
{
216 struct fw_cdev_event_phy_packet phy_packet
;
219 static inline void __user
*u64_to_uptr(__u64 value
)
221 return (void __user
*)(unsigned long)value
;
224 static inline __u64
uptr_to_u64(void __user
*ptr
)
226 return (__u64
)(unsigned long)ptr
;
229 static int fw_device_op_open(struct inode
*inode
, struct file
*file
)
231 struct fw_device
*device
;
232 struct client
*client
;
234 device
= fw_device_get_by_devt(inode
->i_rdev
);
238 if (fw_device_is_shutdown(device
)) {
239 fw_device_put(device
);
243 client
= kzalloc(sizeof(*client
), GFP_KERNEL
);
244 if (client
== NULL
) {
245 fw_device_put(device
);
249 client
->device
= device
;
250 spin_lock_init(&client
->lock
);
251 idr_init(&client
->resource_idr
);
252 INIT_LIST_HEAD(&client
->event_list
);
253 init_waitqueue_head(&client
->wait
);
254 init_waitqueue_head(&client
->tx_flush_wait
);
255 INIT_LIST_HEAD(&client
->phy_receiver_link
);
256 INIT_LIST_HEAD(&client
->link
);
257 kref_init(&client
->kref
);
259 file
->private_data
= client
;
261 return nonseekable_open(inode
, file
);
264 static void queue_event(struct client
*client
, struct event
*event
,
265 void *data0
, size_t size0
, void *data1
, size_t size1
)
269 event
->v
[0].data
= data0
;
270 event
->v
[0].size
= size0
;
271 event
->v
[1].data
= data1
;
272 event
->v
[1].size
= size1
;
274 spin_lock_irqsave(&client
->lock
, flags
);
275 if (client
->in_shutdown
)
278 list_add_tail(&event
->link
, &client
->event_list
);
279 spin_unlock_irqrestore(&client
->lock
, flags
);
281 wake_up_interruptible(&client
->wait
);
284 static int dequeue_event(struct client
*client
,
285 char __user
*buffer
, size_t count
)
291 ret
= wait_event_interruptible(client
->wait
,
292 !list_empty(&client
->event_list
) ||
293 fw_device_is_shutdown(client
->device
));
297 if (list_empty(&client
->event_list
) &&
298 fw_device_is_shutdown(client
->device
))
301 spin_lock_irq(&client
->lock
);
302 event
= list_first_entry(&client
->event_list
, struct event
, link
);
303 list_del(&event
->link
);
304 spin_unlock_irq(&client
->lock
);
307 for (i
= 0; i
< ARRAY_SIZE(event
->v
) && total
< count
; i
++) {
308 size
= min(event
->v
[i
].size
, count
- total
);
309 if (copy_to_user(buffer
+ total
, event
->v
[i
].data
, size
)) {
323 static ssize_t
fw_device_op_read(struct file
*file
, char __user
*buffer
,
324 size_t count
, loff_t
*offset
)
326 struct client
*client
= file
->private_data
;
328 return dequeue_event(client
, buffer
, count
);
331 static void fill_bus_reset_event(struct fw_cdev_event_bus_reset
*event
,
332 struct client
*client
)
334 struct fw_card
*card
= client
->device
->card
;
336 spin_lock_irq(&card
->lock
);
338 event
->closure
= client
->bus_reset_closure
;
339 event
->type
= FW_CDEV_EVENT_BUS_RESET
;
340 event
->generation
= client
->device
->generation
;
341 event
->node_id
= client
->device
->node_id
;
342 event
->local_node_id
= card
->local_node
->node_id
;
343 event
->bm_node_id
= card
->bm_node_id
;
344 event
->irm_node_id
= card
->irm_node
->node_id
;
345 event
->root_node_id
= card
->root_node
->node_id
;
347 spin_unlock_irq(&card
->lock
);
350 static void for_each_client(struct fw_device
*device
,
351 void (*callback
)(struct client
*client
))
355 mutex_lock(&device
->client_list_mutex
);
356 list_for_each_entry(c
, &device
->client_list
, link
)
358 mutex_unlock(&device
->client_list_mutex
);
361 static int schedule_reallocations(int id
, void *p
, void *data
)
363 schedule_if_iso_resource(p
);
368 static void queue_bus_reset_event(struct client
*client
)
370 struct bus_reset_event
*e
;
372 e
= kzalloc(sizeof(*e
), GFP_KERNEL
);
374 fw_notify("Out of memory when allocating event\n");
378 fill_bus_reset_event(&e
->reset
, client
);
380 queue_event(client
, &e
->event
,
381 &e
->reset
, sizeof(e
->reset
), NULL
, 0);
383 spin_lock_irq(&client
->lock
);
384 idr_for_each(&client
->resource_idr
, schedule_reallocations
, client
);
385 spin_unlock_irq(&client
->lock
);
388 void fw_device_cdev_update(struct fw_device
*device
)
390 for_each_client(device
, queue_bus_reset_event
);
393 static void wake_up_client(struct client
*client
)
395 wake_up_interruptible(&client
->wait
);
398 void fw_device_cdev_remove(struct fw_device
*device
)
400 for_each_client(device
, wake_up_client
);
404 struct fw_cdev_get_info get_info
;
405 struct fw_cdev_send_request send_request
;
406 struct fw_cdev_allocate allocate
;
407 struct fw_cdev_deallocate deallocate
;
408 struct fw_cdev_send_response send_response
;
409 struct fw_cdev_initiate_bus_reset initiate_bus_reset
;
410 struct fw_cdev_add_descriptor add_descriptor
;
411 struct fw_cdev_remove_descriptor remove_descriptor
;
412 struct fw_cdev_create_iso_context create_iso_context
;
413 struct fw_cdev_queue_iso queue_iso
;
414 struct fw_cdev_start_iso start_iso
;
415 struct fw_cdev_stop_iso stop_iso
;
416 struct fw_cdev_get_cycle_timer get_cycle_timer
;
417 struct fw_cdev_allocate_iso_resource allocate_iso_resource
;
418 struct fw_cdev_send_stream_packet send_stream_packet
;
419 struct fw_cdev_get_cycle_timer2 get_cycle_timer2
;
420 struct fw_cdev_send_phy_packet send_phy_packet
;
421 struct fw_cdev_receive_phy_packets receive_phy_packets
;
422 struct fw_cdev_set_iso_channels set_iso_channels
;
425 static int ioctl_get_info(struct client
*client
, union ioctl_arg
*arg
)
427 struct fw_cdev_get_info
*a
= &arg
->get_info
;
428 struct fw_cdev_event_bus_reset bus_reset
;
429 unsigned long ret
= 0;
431 client
->version
= a
->version
;
432 a
->version
= FW_CDEV_KERNEL_VERSION
;
433 a
->card
= client
->device
->card
->index
;
435 down_read(&fw_device_rwsem
);
438 size_t want
= a
->rom_length
;
439 size_t have
= client
->device
->config_rom_length
* 4;
441 ret
= copy_to_user(u64_to_uptr(a
->rom
),
442 client
->device
->config_rom
, min(want
, have
));
444 a
->rom_length
= client
->device
->config_rom_length
* 4;
446 up_read(&fw_device_rwsem
);
451 mutex_lock(&client
->device
->client_list_mutex
);
453 client
->bus_reset_closure
= a
->bus_reset_closure
;
454 if (a
->bus_reset
!= 0) {
455 fill_bus_reset_event(&bus_reset
, client
);
456 ret
= copy_to_user(u64_to_uptr(a
->bus_reset
),
457 &bus_reset
, sizeof(bus_reset
));
459 if (ret
== 0 && list_empty(&client
->link
))
460 list_add_tail(&client
->link
, &client
->device
->client_list
);
462 mutex_unlock(&client
->device
->client_list_mutex
);
464 return ret
? -EFAULT
: 0;
467 static int add_client_resource(struct client
*client
,
468 struct client_resource
*resource
, gfp_t gfp_mask
)
474 if (idr_pre_get(&client
->resource_idr
, gfp_mask
) == 0)
477 spin_lock_irqsave(&client
->lock
, flags
);
478 if (client
->in_shutdown
)
481 ret
= idr_get_new(&client
->resource_idr
, resource
,
485 schedule_if_iso_resource(resource
);
487 spin_unlock_irqrestore(&client
->lock
, flags
);
492 return ret
< 0 ? ret
: 0;
495 static int release_client_resource(struct client
*client
, u32 handle
,
496 client_resource_release_fn_t release
,
497 struct client_resource
**return_resource
)
499 struct client_resource
*resource
;
501 spin_lock_irq(&client
->lock
);
502 if (client
->in_shutdown
)
505 resource
= idr_find(&client
->resource_idr
, handle
);
506 if (resource
&& resource
->release
== release
)
507 idr_remove(&client
->resource_idr
, handle
);
508 spin_unlock_irq(&client
->lock
);
510 if (!(resource
&& resource
->release
== release
))
514 *return_resource
= resource
;
516 resource
->release(client
, resource
);
523 static void release_transaction(struct client
*client
,
524 struct client_resource
*resource
)
528 static void complete_transaction(struct fw_card
*card
, int rcode
,
529 void *payload
, size_t length
, void *data
)
531 struct outbound_transaction_event
*e
= data
;
532 struct fw_cdev_event_response
*rsp
= &e
->response
;
533 struct client
*client
= e
->client
;
536 if (length
< rsp
->length
)
537 rsp
->length
= length
;
538 if (rcode
== RCODE_COMPLETE
)
539 memcpy(rsp
->data
, payload
, rsp
->length
);
541 spin_lock_irqsave(&client
->lock
, flags
);
542 idr_remove(&client
->resource_idr
, e
->r
.resource
.handle
);
543 if (client
->in_shutdown
)
544 wake_up(&client
->tx_flush_wait
);
545 spin_unlock_irqrestore(&client
->lock
, flags
);
547 rsp
->type
= FW_CDEV_EVENT_RESPONSE
;
551 * In the case that sizeof(*rsp) doesn't align with the position of the
552 * data, and the read is short, preserve an extra copy of the data
553 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
554 * for short reads and some apps depended on it, this is both safe
555 * and prudent for compatibility.
557 if (rsp
->length
<= sizeof(*rsp
) - offsetof(typeof(*rsp
), data
))
558 queue_event(client
, &e
->event
, rsp
, sizeof(*rsp
),
559 rsp
->data
, rsp
->length
);
561 queue_event(client
, &e
->event
, rsp
, sizeof(*rsp
) + rsp
->length
,
564 /* Drop the idr's reference */
568 static int init_request(struct client
*client
,
569 struct fw_cdev_send_request
*request
,
570 int destination_id
, int speed
)
572 struct outbound_transaction_event
*e
;
575 if (request
->tcode
!= TCODE_STREAM_DATA
&&
576 (request
->length
> 4096 || request
->length
> 512 << speed
))
579 if (request
->tcode
== TCODE_WRITE_QUADLET_REQUEST
&&
583 e
= kmalloc(sizeof(*e
) + request
->length
, GFP_KERNEL
);
588 e
->response
.length
= request
->length
;
589 e
->response
.closure
= request
->closure
;
592 copy_from_user(e
->response
.data
,
593 u64_to_uptr(request
->data
), request
->length
)) {
598 e
->r
.resource
.release
= release_transaction
;
599 ret
= add_client_resource(client
, &e
->r
.resource
, GFP_KERNEL
);
603 fw_send_request(client
->device
->card
, &e
->r
.transaction
,
604 request
->tcode
, destination_id
, request
->generation
,
605 speed
, request
->offset
, e
->response
.data
,
606 request
->length
, complete_transaction
, e
);
615 static int ioctl_send_request(struct client
*client
, union ioctl_arg
*arg
)
617 switch (arg
->send_request
.tcode
) {
618 case TCODE_WRITE_QUADLET_REQUEST
:
619 case TCODE_WRITE_BLOCK_REQUEST
:
620 case TCODE_READ_QUADLET_REQUEST
:
621 case TCODE_READ_BLOCK_REQUEST
:
622 case TCODE_LOCK_MASK_SWAP
:
623 case TCODE_LOCK_COMPARE_SWAP
:
624 case TCODE_LOCK_FETCH_ADD
:
625 case TCODE_LOCK_LITTLE_ADD
:
626 case TCODE_LOCK_BOUNDED_ADD
:
627 case TCODE_LOCK_WRAP_ADD
:
628 case TCODE_LOCK_VENDOR_DEPENDENT
:
634 return init_request(client
, &arg
->send_request
, client
->device
->node_id
,
635 client
->device
->max_speed
);
638 static inline bool is_fcp_request(struct fw_request
*request
)
640 return request
== NULL
;
643 static void release_request(struct client
*client
,
644 struct client_resource
*resource
)
646 struct inbound_transaction_resource
*r
= container_of(resource
,
647 struct inbound_transaction_resource
, resource
);
649 if (is_fcp_request(r
->request
))
652 fw_send_response(r
->card
, r
->request
, RCODE_CONFLICT_ERROR
);
654 fw_card_put(r
->card
);
658 static void handle_request(struct fw_card
*card
, struct fw_request
*request
,
659 int tcode
, int destination
, int source
,
660 int generation
, unsigned long long offset
,
661 void *payload
, size_t length
, void *callback_data
)
663 struct address_handler_resource
*handler
= callback_data
;
664 struct inbound_transaction_resource
*r
;
665 struct inbound_transaction_event
*e
;
667 void *fcp_frame
= NULL
;
670 /* card may be different from handler->client->device->card */
673 r
= kmalloc(sizeof(*r
), GFP_ATOMIC
);
674 e
= kmalloc(sizeof(*e
), GFP_ATOMIC
);
675 if (r
== NULL
|| e
== NULL
) {
676 fw_notify("Out of memory when allocating event\n");
680 r
->request
= request
;
684 if (is_fcp_request(request
)) {
686 * FIXME: Let core-transaction.c manage a
687 * single reference-counted copy?
689 fcp_frame
= kmemdup(payload
, length
, GFP_ATOMIC
);
690 if (fcp_frame
== NULL
)
696 r
->resource
.release
= release_request
;
697 ret
= add_client_resource(handler
->client
, &r
->resource
, GFP_ATOMIC
);
701 if (handler
->client
->version
< FW_CDEV_VERSION_EVENT_REQUEST2
) {
702 struct fw_cdev_event_request
*req
= &e
->req
.request
;
705 tcode
= TCODE_LOCK_REQUEST
;
707 req
->type
= FW_CDEV_EVENT_REQUEST
;
709 req
->offset
= offset
;
710 req
->length
= length
;
711 req
->handle
= r
->resource
.handle
;
712 req
->closure
= handler
->closure
;
713 event_size0
= sizeof(*req
);
715 struct fw_cdev_event_request2
*req
= &e
->req
.request2
;
717 req
->type
= FW_CDEV_EVENT_REQUEST2
;
719 req
->offset
= offset
;
720 req
->source_node_id
= source
;
721 req
->destination_node_id
= destination
;
722 req
->card
= card
->index
;
723 req
->generation
= generation
;
724 req
->length
= length
;
725 req
->handle
= r
->resource
.handle
;
726 req
->closure
= handler
->closure
;
727 event_size0
= sizeof(*req
);
730 queue_event(handler
->client
, &e
->event
,
731 &e
->req
, event_size0
, r
->data
, length
);
739 if (!is_fcp_request(request
))
740 fw_send_response(card
, request
, RCODE_CONFLICT_ERROR
);
745 static void release_address_handler(struct client
*client
,
746 struct client_resource
*resource
)
748 struct address_handler_resource
*r
=
749 container_of(resource
, struct address_handler_resource
, resource
);
751 fw_core_remove_address_handler(&r
->handler
);
755 static int ioctl_allocate(struct client
*client
, union ioctl_arg
*arg
)
757 struct fw_cdev_allocate
*a
= &arg
->allocate
;
758 struct address_handler_resource
*r
;
759 struct fw_address_region region
;
762 r
= kmalloc(sizeof(*r
), GFP_KERNEL
);
766 region
.start
= a
->offset
;
767 if (client
->version
< FW_CDEV_VERSION_ALLOCATE_REGION_END
)
768 region
.end
= a
->offset
+ a
->length
;
770 region
.end
= a
->region_end
;
772 r
->handler
.length
= a
->length
;
773 r
->handler
.address_callback
= handle_request
;
774 r
->handler
.callback_data
= r
;
775 r
->closure
= a
->closure
;
778 ret
= fw_core_add_address_handler(&r
->handler
, ®ion
);
783 a
->offset
= r
->handler
.offset
;
785 r
->resource
.release
= release_address_handler
;
786 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
788 release_address_handler(client
, &r
->resource
);
791 a
->handle
= r
->resource
.handle
;
796 static int ioctl_deallocate(struct client
*client
, union ioctl_arg
*arg
)
798 return release_client_resource(client
, arg
->deallocate
.handle
,
799 release_address_handler
, NULL
);
802 static int ioctl_send_response(struct client
*client
, union ioctl_arg
*arg
)
804 struct fw_cdev_send_response
*a
= &arg
->send_response
;
805 struct client_resource
*resource
;
806 struct inbound_transaction_resource
*r
;
809 if (release_client_resource(client
, a
->handle
,
810 release_request
, &resource
) < 0)
813 r
= container_of(resource
, struct inbound_transaction_resource
,
815 if (is_fcp_request(r
->request
))
818 if (a
->length
!= fw_get_response_length(r
->request
)) {
823 if (copy_from_user(r
->data
, u64_to_uptr(a
->data
), a
->length
)) {
828 fw_send_response(r
->card
, r
->request
, a
->rcode
);
830 fw_card_put(r
->card
);
836 static int ioctl_initiate_bus_reset(struct client
*client
, union ioctl_arg
*arg
)
838 fw_schedule_bus_reset(client
->device
->card
, true,
839 arg
->initiate_bus_reset
.type
== FW_CDEV_SHORT_RESET
);
843 static void release_descriptor(struct client
*client
,
844 struct client_resource
*resource
)
846 struct descriptor_resource
*r
=
847 container_of(resource
, struct descriptor_resource
, resource
);
849 fw_core_remove_descriptor(&r
->descriptor
);
853 static int ioctl_add_descriptor(struct client
*client
, union ioctl_arg
*arg
)
855 struct fw_cdev_add_descriptor
*a
= &arg
->add_descriptor
;
856 struct descriptor_resource
*r
;
859 /* Access policy: Allow this ioctl only on local nodes' device files. */
860 if (!client
->device
->is_local
)
866 r
= kmalloc(sizeof(*r
) + a
->length
* 4, GFP_KERNEL
);
870 if (copy_from_user(r
->data
, u64_to_uptr(a
->data
), a
->length
* 4)) {
875 r
->descriptor
.length
= a
->length
;
876 r
->descriptor
.immediate
= a
->immediate
;
877 r
->descriptor
.key
= a
->key
;
878 r
->descriptor
.data
= r
->data
;
880 ret
= fw_core_add_descriptor(&r
->descriptor
);
884 r
->resource
.release
= release_descriptor
;
885 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
887 fw_core_remove_descriptor(&r
->descriptor
);
890 a
->handle
= r
->resource
.handle
;
899 static int ioctl_remove_descriptor(struct client
*client
, union ioctl_arg
*arg
)
901 return release_client_resource(client
, arg
->remove_descriptor
.handle
,
902 release_descriptor
, NULL
);
905 static void iso_callback(struct fw_iso_context
*context
, u32 cycle
,
906 size_t header_length
, void *header
, void *data
)
908 struct client
*client
= data
;
909 struct iso_interrupt_event
*e
;
911 e
= kmalloc(sizeof(*e
) + header_length
, GFP_ATOMIC
);
913 fw_notify("Out of memory when allocating event\n");
916 e
->interrupt
.type
= FW_CDEV_EVENT_ISO_INTERRUPT
;
917 e
->interrupt
.closure
= client
->iso_closure
;
918 e
->interrupt
.cycle
= cycle
;
919 e
->interrupt
.header_length
= header_length
;
920 memcpy(e
->interrupt
.header
, header
, header_length
);
921 queue_event(client
, &e
->event
, &e
->interrupt
,
922 sizeof(e
->interrupt
) + header_length
, NULL
, 0);
925 static void iso_mc_callback(struct fw_iso_context
*context
,
926 dma_addr_t completed
, void *data
)
928 struct client
*client
= data
;
929 struct iso_interrupt_mc_event
*e
;
931 e
= kmalloc(sizeof(*e
), GFP_ATOMIC
);
933 fw_notify("Out of memory when allocating event\n");
936 e
->interrupt
.type
= FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL
;
937 e
->interrupt
.closure
= client
->iso_closure
;
938 e
->interrupt
.completed
= fw_iso_buffer_lookup(&client
->buffer
,
940 queue_event(client
, &e
->event
, &e
->interrupt
,
941 sizeof(e
->interrupt
), NULL
, 0);
944 static int ioctl_create_iso_context(struct client
*client
, union ioctl_arg
*arg
)
946 struct fw_cdev_create_iso_context
*a
= &arg
->create_iso_context
;
947 struct fw_iso_context
*context
;
948 fw_iso_callback_t cb
;
950 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT
!= FW_ISO_CONTEXT_TRANSMIT
||
951 FW_CDEV_ISO_CONTEXT_RECEIVE
!= FW_ISO_CONTEXT_RECEIVE
||
952 FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL
!=
953 FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL
);
956 case FW_ISO_CONTEXT_TRANSMIT
:
957 if (a
->speed
> SCODE_3200
|| a
->channel
> 63)
963 case FW_ISO_CONTEXT_RECEIVE
:
964 if (a
->header_size
< 4 || (a
->header_size
& 3) ||
971 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL
:
972 cb
= (fw_iso_callback_t
)iso_mc_callback
;
979 context
= fw_iso_context_create(client
->device
->card
, a
->type
,
980 a
->channel
, a
->speed
, a
->header_size
, cb
, client
);
982 return PTR_ERR(context
);
984 /* We only support one context at this time. */
985 spin_lock_irq(&client
->lock
);
986 if (client
->iso_context
!= NULL
) {
987 spin_unlock_irq(&client
->lock
);
988 fw_iso_context_destroy(context
);
991 client
->iso_closure
= a
->closure
;
992 client
->iso_context
= context
;
993 spin_unlock_irq(&client
->lock
);
1000 static int ioctl_set_iso_channels(struct client
*client
, union ioctl_arg
*arg
)
1002 struct fw_cdev_set_iso_channels
*a
= &arg
->set_iso_channels
;
1003 struct fw_iso_context
*ctx
= client
->iso_context
;
1005 if (ctx
== NULL
|| a
->handle
!= 0)
1008 return fw_iso_context_set_channels(ctx
, &a
->channels
);
1011 /* Macros for decoding the iso packet control header. */
1012 #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
1013 #define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
1014 #define GET_SKIP(v) (((v) >> 17) & 0x01)
1015 #define GET_TAG(v) (((v) >> 18) & 0x03)
1016 #define GET_SY(v) (((v) >> 20) & 0x0f)
1017 #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
1019 static int ioctl_queue_iso(struct client
*client
, union ioctl_arg
*arg
)
1021 struct fw_cdev_queue_iso
*a
= &arg
->queue_iso
;
1022 struct fw_cdev_iso_packet __user
*p
, *end
, *next
;
1023 struct fw_iso_context
*ctx
= client
->iso_context
;
1024 unsigned long payload
, buffer_end
, transmit_header_bytes
= 0;
1028 struct fw_iso_packet packet
;
1032 if (ctx
== NULL
|| a
->handle
!= 0)
1036 * If the user passes a non-NULL data pointer, has mmap()'ed
1037 * the iso buffer, and the pointer points inside the buffer,
1038 * we setup the payload pointers accordingly. Otherwise we
1039 * set them both to 0, which will still let packets with
1040 * payload_length == 0 through. In other words, if no packets
1041 * use the indirect payload, the iso buffer need not be mapped
1042 * and the a->data pointer is ignored.
1044 payload
= (unsigned long)a
->data
- client
->vm_start
;
1045 buffer_end
= client
->buffer
.page_count
<< PAGE_SHIFT
;
1046 if (a
->data
== 0 || client
->buffer
.pages
== NULL
||
1047 payload
>= buffer_end
) {
1052 if (ctx
->type
== FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL
&& payload
& 3)
1055 p
= (struct fw_cdev_iso_packet __user
*)u64_to_uptr(a
->packets
);
1056 if (!access_ok(VERIFY_READ
, p
, a
->size
))
1059 end
= (void __user
*)p
+ a
->size
;
1062 if (get_user(control
, &p
->control
))
1064 u
.packet
.payload_length
= GET_PAYLOAD_LENGTH(control
);
1065 u
.packet
.interrupt
= GET_INTERRUPT(control
);
1066 u
.packet
.skip
= GET_SKIP(control
);
1067 u
.packet
.tag
= GET_TAG(control
);
1068 u
.packet
.sy
= GET_SY(control
);
1069 u
.packet
.header_length
= GET_HEADER_LENGTH(control
);
1071 switch (ctx
->type
) {
1072 case FW_ISO_CONTEXT_TRANSMIT
:
1073 if (u
.packet
.header_length
& 3)
1075 transmit_header_bytes
= u
.packet
.header_length
;
1078 case FW_ISO_CONTEXT_RECEIVE
:
1079 if (u
.packet
.header_length
== 0 ||
1080 u
.packet
.header_length
% ctx
->header_size
!= 0)
1084 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL
:
1085 if (u
.packet
.payload_length
== 0 ||
1086 u
.packet
.payload_length
& 3)
1091 next
= (struct fw_cdev_iso_packet __user
*)
1092 &p
->header
[transmit_header_bytes
/ 4];
1095 if (__copy_from_user
1096 (u
.packet
.header
, p
->header
, transmit_header_bytes
))
1098 if (u
.packet
.skip
&& ctx
->type
== FW_ISO_CONTEXT_TRANSMIT
&&
1099 u
.packet
.header_length
+ u
.packet
.payload_length
> 0)
1101 if (payload
+ u
.packet
.payload_length
> buffer_end
)
1104 if (fw_iso_context_queue(ctx
, &u
.packet
,
1105 &client
->buffer
, payload
))
1109 payload
+= u
.packet
.payload_length
;
1112 fw_iso_context_queue_flush(ctx
);
1114 a
->size
-= uptr_to_u64(p
) - a
->packets
;
1115 a
->packets
= uptr_to_u64(p
);
1116 a
->data
= client
->vm_start
+ payload
;
1121 static int ioctl_start_iso(struct client
*client
, union ioctl_arg
*arg
)
1123 struct fw_cdev_start_iso
*a
= &arg
->start_iso
;
1126 FW_CDEV_ISO_CONTEXT_MATCH_TAG0
!= FW_ISO_CONTEXT_MATCH_TAG0
||
1127 FW_CDEV_ISO_CONTEXT_MATCH_TAG1
!= FW_ISO_CONTEXT_MATCH_TAG1
||
1128 FW_CDEV_ISO_CONTEXT_MATCH_TAG2
!= FW_ISO_CONTEXT_MATCH_TAG2
||
1129 FW_CDEV_ISO_CONTEXT_MATCH_TAG3
!= FW_ISO_CONTEXT_MATCH_TAG3
||
1130 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS
!= FW_ISO_CONTEXT_MATCH_ALL_TAGS
);
1132 if (client
->iso_context
== NULL
|| a
->handle
!= 0)
1135 if (client
->iso_context
->type
== FW_ISO_CONTEXT_RECEIVE
&&
1136 (a
->tags
== 0 || a
->tags
> 15 || a
->sync
> 15))
1139 return fw_iso_context_start(client
->iso_context
,
1140 a
->cycle
, a
->sync
, a
->tags
);
1143 static int ioctl_stop_iso(struct client
*client
, union ioctl_arg
*arg
)
1145 struct fw_cdev_stop_iso
*a
= &arg
->stop_iso
;
1147 if (client
->iso_context
== NULL
|| a
->handle
!= 0)
1150 return fw_iso_context_stop(client
->iso_context
);
1153 static int ioctl_get_cycle_timer2(struct client
*client
, union ioctl_arg
*arg
)
1155 struct fw_cdev_get_cycle_timer2
*a
= &arg
->get_cycle_timer2
;
1156 struct fw_card
*card
= client
->device
->card
;
1157 struct timespec ts
= {0, 0};
1161 local_irq_disable();
1163 cycle_time
= card
->driver
->read_csr(card
, CSR_CYCLE_TIME
);
1165 switch (a
->clk_id
) {
1166 case CLOCK_REALTIME
: getnstimeofday(&ts
); break;
1167 case CLOCK_MONOTONIC
: do_posix_clock_monotonic_gettime(&ts
); break;
1168 case CLOCK_MONOTONIC_RAW
: getrawmonotonic(&ts
); break;
1175 a
->tv_sec
= ts
.tv_sec
;
1176 a
->tv_nsec
= ts
.tv_nsec
;
1177 a
->cycle_timer
= cycle_time
;
1182 static int ioctl_get_cycle_timer(struct client
*client
, union ioctl_arg
*arg
)
1184 struct fw_cdev_get_cycle_timer
*a
= &arg
->get_cycle_timer
;
1185 struct fw_cdev_get_cycle_timer2 ct2
;
1187 ct2
.clk_id
= CLOCK_REALTIME
;
1188 ioctl_get_cycle_timer2(client
, (union ioctl_arg
*)&ct2
);
1190 a
->local_time
= ct2
.tv_sec
* USEC_PER_SEC
+ ct2
.tv_nsec
/ NSEC_PER_USEC
;
1191 a
->cycle_timer
= ct2
.cycle_timer
;
1196 static void iso_resource_work(struct work_struct
*work
)
1198 struct iso_resource_event
*e
;
1199 struct iso_resource
*r
=
1200 container_of(work
, struct iso_resource
, work
.work
);
1201 struct client
*client
= r
->client
;
1202 int generation
, channel
, bandwidth
, todo
;
1203 bool skip
, free
, success
;
1205 spin_lock_irq(&client
->lock
);
1206 generation
= client
->device
->generation
;
1208 /* Allow 1000ms grace period for other reallocations. */
1209 if (todo
== ISO_RES_ALLOC
&&
1210 time_before64(get_jiffies_64(),
1211 client
->device
->card
->reset_jiffies
+ HZ
)) {
1212 schedule_iso_resource(r
, DIV_ROUND_UP(HZ
, 3));
1215 /* We could be called twice within the same generation. */
1216 skip
= todo
== ISO_RES_REALLOC
&&
1217 r
->generation
== generation
;
1219 free
= todo
== ISO_RES_DEALLOC
||
1220 todo
== ISO_RES_ALLOC_ONCE
||
1221 todo
== ISO_RES_DEALLOC_ONCE
;
1222 r
->generation
= generation
;
1223 spin_unlock_irq(&client
->lock
);
1228 bandwidth
= r
->bandwidth
;
1230 fw_iso_resource_manage(client
->device
->card
, generation
,
1231 r
->channels
, &channel
, &bandwidth
,
1232 todo
== ISO_RES_ALLOC
||
1233 todo
== ISO_RES_REALLOC
||
1234 todo
== ISO_RES_ALLOC_ONCE
);
1236 * Is this generation outdated already? As long as this resource sticks
1237 * in the idr, it will be scheduled again for a newer generation or at
1240 if (channel
== -EAGAIN
&&
1241 (todo
== ISO_RES_ALLOC
|| todo
== ISO_RES_REALLOC
))
1244 success
= channel
>= 0 || bandwidth
> 0;
1246 spin_lock_irq(&client
->lock
);
1248 * Transit from allocation to reallocation, except if the client
1249 * requested deallocation in the meantime.
1251 if (r
->todo
== ISO_RES_ALLOC
)
1252 r
->todo
= ISO_RES_REALLOC
;
1254 * Allocation or reallocation failure? Pull this resource out of the
1255 * idr and prepare for deletion, unless the client is shutting down.
1257 if (r
->todo
== ISO_RES_REALLOC
&& !success
&&
1258 !client
->in_shutdown
&&
1259 idr_find(&client
->resource_idr
, r
->resource
.handle
)) {
1260 idr_remove(&client
->resource_idr
, r
->resource
.handle
);
1264 spin_unlock_irq(&client
->lock
);
1266 if (todo
== ISO_RES_ALLOC
&& channel
>= 0)
1267 r
->channels
= 1ULL << channel
;
1269 if (todo
== ISO_RES_REALLOC
&& success
)
1272 if (todo
== ISO_RES_ALLOC
|| todo
== ISO_RES_ALLOC_ONCE
) {
1277 r
->e_dealloc
= NULL
;
1279 e
->iso_resource
.handle
= r
->resource
.handle
;
1280 e
->iso_resource
.channel
= channel
;
1281 e
->iso_resource
.bandwidth
= bandwidth
;
1283 queue_event(client
, &e
->event
,
1284 &e
->iso_resource
, sizeof(e
->iso_resource
), NULL
, 0);
1287 cancel_delayed_work(&r
->work
);
1289 kfree(r
->e_dealloc
);
1296 static void release_iso_resource(struct client
*client
,
1297 struct client_resource
*resource
)
1299 struct iso_resource
*r
=
1300 container_of(resource
, struct iso_resource
, resource
);
1302 spin_lock_irq(&client
->lock
);
1303 r
->todo
= ISO_RES_DEALLOC
;
1304 schedule_iso_resource(r
, 0);
1305 spin_unlock_irq(&client
->lock
);
1308 static int init_iso_resource(struct client
*client
,
1309 struct fw_cdev_allocate_iso_resource
*request
, int todo
)
1311 struct iso_resource_event
*e1
, *e2
;
1312 struct iso_resource
*r
;
1315 if ((request
->channels
== 0 && request
->bandwidth
== 0) ||
1316 request
->bandwidth
> BANDWIDTH_AVAILABLE_INITIAL
||
1317 request
->bandwidth
< 0)
1320 r
= kmalloc(sizeof(*r
), GFP_KERNEL
);
1321 e1
= kmalloc(sizeof(*e1
), GFP_KERNEL
);
1322 e2
= kmalloc(sizeof(*e2
), GFP_KERNEL
);
1323 if (r
== NULL
|| e1
== NULL
|| e2
== NULL
) {
1328 INIT_DELAYED_WORK(&r
->work
, iso_resource_work
);
1332 r
->channels
= request
->channels
;
1333 r
->bandwidth
= request
->bandwidth
;
1337 e1
->iso_resource
.closure
= request
->closure
;
1338 e1
->iso_resource
.type
= FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED
;
1339 e2
->iso_resource
.closure
= request
->closure
;
1340 e2
->iso_resource
.type
= FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED
;
1342 if (todo
== ISO_RES_ALLOC
) {
1343 r
->resource
.release
= release_iso_resource
;
1344 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
1348 r
->resource
.release
= NULL
;
1349 r
->resource
.handle
= -1;
1350 schedule_iso_resource(r
, 0);
1352 request
->handle
= r
->resource
.handle
;
1363 static int ioctl_allocate_iso_resource(struct client
*client
,
1364 union ioctl_arg
*arg
)
1366 return init_iso_resource(client
,
1367 &arg
->allocate_iso_resource
, ISO_RES_ALLOC
);
1370 static int ioctl_deallocate_iso_resource(struct client
*client
,
1371 union ioctl_arg
*arg
)
1373 return release_client_resource(client
,
1374 arg
->deallocate
.handle
, release_iso_resource
, NULL
);
1377 static int ioctl_allocate_iso_resource_once(struct client
*client
,
1378 union ioctl_arg
*arg
)
1380 return init_iso_resource(client
,
1381 &arg
->allocate_iso_resource
, ISO_RES_ALLOC_ONCE
);
1384 static int ioctl_deallocate_iso_resource_once(struct client
*client
,
1385 union ioctl_arg
*arg
)
1387 return init_iso_resource(client
,
1388 &arg
->allocate_iso_resource
, ISO_RES_DEALLOC_ONCE
);
1392 * Returns a speed code: Maximum speed to or from this device,
1393 * limited by the device's link speed, the local node's link speed,
1394 * and all PHY port speeds between the two links.
1396 static int ioctl_get_speed(struct client
*client
, union ioctl_arg
*arg
)
1398 return client
->device
->max_speed
;
1401 static int ioctl_send_broadcast_request(struct client
*client
,
1402 union ioctl_arg
*arg
)
1404 struct fw_cdev_send_request
*a
= &arg
->send_request
;
1407 case TCODE_WRITE_QUADLET_REQUEST
:
1408 case TCODE_WRITE_BLOCK_REQUEST
:
1414 /* Security policy: Only allow accesses to Units Space. */
1415 if (a
->offset
< CSR_REGISTER_BASE
+ CSR_CONFIG_ROM_END
)
1418 return init_request(client
, a
, LOCAL_BUS
| 0x3f, SCODE_100
);
1421 static int ioctl_send_stream_packet(struct client
*client
, union ioctl_arg
*arg
)
1423 struct fw_cdev_send_stream_packet
*a
= &arg
->send_stream_packet
;
1424 struct fw_cdev_send_request request
;
1427 if (a
->speed
> client
->device
->card
->link_speed
||
1428 a
->length
> 1024 << a
->speed
)
1431 if (a
->tag
> 3 || a
->channel
> 63 || a
->sy
> 15)
1434 dest
= fw_stream_packet_destination_id(a
->tag
, a
->channel
, a
->sy
);
1435 request
.tcode
= TCODE_STREAM_DATA
;
1436 request
.length
= a
->length
;
1437 request
.closure
= a
->closure
;
1438 request
.data
= a
->data
;
1439 request
.generation
= a
->generation
;
1441 return init_request(client
, &request
, dest
, a
->speed
);
1444 static void outbound_phy_packet_callback(struct fw_packet
*packet
,
1445 struct fw_card
*card
, int status
)
1447 struct outbound_phy_packet_event
*e
=
1448 container_of(packet
, struct outbound_phy_packet_event
, p
);
1452 case ACK_COMPLETE
: e
->phy_packet
.rcode
= RCODE_COMPLETE
; break;
1453 /* should never happen with PHY packets: */
1454 case ACK_PENDING
: e
->phy_packet
.rcode
= RCODE_COMPLETE
; break;
1457 case ACK_BUSY_B
: e
->phy_packet
.rcode
= RCODE_BUSY
; break;
1458 case ACK_DATA_ERROR
: e
->phy_packet
.rcode
= RCODE_DATA_ERROR
; break;
1459 case ACK_TYPE_ERROR
: e
->phy_packet
.rcode
= RCODE_TYPE_ERROR
; break;
1460 /* stale generation; cancelled; on certain controllers: no ack */
1461 default: e
->phy_packet
.rcode
= status
; break;
1463 e
->phy_packet
.data
[0] = packet
->timestamp
;
1465 queue_event(e
->client
, &e
->event
, &e
->phy_packet
,
1466 sizeof(e
->phy_packet
) + e
->phy_packet
.length
, NULL
, 0);
1467 client_put(e
->client
);
1470 static int ioctl_send_phy_packet(struct client
*client
, union ioctl_arg
*arg
)
1472 struct fw_cdev_send_phy_packet
*a
= &arg
->send_phy_packet
;
1473 struct fw_card
*card
= client
->device
->card
;
1474 struct outbound_phy_packet_event
*e
;
1476 /* Access policy: Allow this ioctl only on local nodes' device files. */
1477 if (!client
->device
->is_local
)
1480 e
= kzalloc(sizeof(*e
) + 4, GFP_KERNEL
);
1486 e
->p
.speed
= SCODE_100
;
1487 e
->p
.generation
= a
->generation
;
1488 e
->p
.header
[0] = TCODE_LINK_INTERNAL
<< 4;
1489 e
->p
.header
[1] = a
->data
[0];
1490 e
->p
.header
[2] = a
->data
[1];
1491 e
->p
.header_length
= 12;
1492 e
->p
.callback
= outbound_phy_packet_callback
;
1493 e
->phy_packet
.closure
= a
->closure
;
1494 e
->phy_packet
.type
= FW_CDEV_EVENT_PHY_PACKET_SENT
;
1495 if (is_ping_packet(a
->data
))
1496 e
->phy_packet
.length
= 4;
1498 card
->driver
->send_request(card
, &e
->p
);
1503 static int ioctl_receive_phy_packets(struct client
*client
, union ioctl_arg
*arg
)
1505 struct fw_cdev_receive_phy_packets
*a
= &arg
->receive_phy_packets
;
1506 struct fw_card
*card
= client
->device
->card
;
1508 /* Access policy: Allow this ioctl only on local nodes' device files. */
1509 if (!client
->device
->is_local
)
1512 spin_lock_irq(&card
->lock
);
1514 list_move_tail(&client
->phy_receiver_link
, &card
->phy_receiver_list
);
1515 client
->phy_receiver_closure
= a
->closure
;
1517 spin_unlock_irq(&card
->lock
);
1522 void fw_cdev_handle_phy_packet(struct fw_card
*card
, struct fw_packet
*p
)
1524 struct client
*client
;
1525 struct inbound_phy_packet_event
*e
;
1526 unsigned long flags
;
1528 spin_lock_irqsave(&card
->lock
, flags
);
1530 list_for_each_entry(client
, &card
->phy_receiver_list
, phy_receiver_link
) {
1531 e
= kmalloc(sizeof(*e
) + 8, GFP_ATOMIC
);
1533 fw_notify("Out of memory when allocating event\n");
1536 e
->phy_packet
.closure
= client
->phy_receiver_closure
;
1537 e
->phy_packet
.type
= FW_CDEV_EVENT_PHY_PACKET_RECEIVED
;
1538 e
->phy_packet
.rcode
= RCODE_COMPLETE
;
1539 e
->phy_packet
.length
= 8;
1540 e
->phy_packet
.data
[0] = p
->header
[1];
1541 e
->phy_packet
.data
[1] = p
->header
[2];
1542 queue_event(client
, &e
->event
,
1543 &e
->phy_packet
, sizeof(e
->phy_packet
) + 8, NULL
, 0);
1546 spin_unlock_irqrestore(&card
->lock
, flags
);
1549 static int (* const ioctl_handlers
[])(struct client
*, union ioctl_arg
*) = {
1550 [0x00] = ioctl_get_info
,
1551 [0x01] = ioctl_send_request
,
1552 [0x02] = ioctl_allocate
,
1553 [0x03] = ioctl_deallocate
,
1554 [0x04] = ioctl_send_response
,
1555 [0x05] = ioctl_initiate_bus_reset
,
1556 [0x06] = ioctl_add_descriptor
,
1557 [0x07] = ioctl_remove_descriptor
,
1558 [0x08] = ioctl_create_iso_context
,
1559 [0x09] = ioctl_queue_iso
,
1560 [0x0a] = ioctl_start_iso
,
1561 [0x0b] = ioctl_stop_iso
,
1562 [0x0c] = ioctl_get_cycle_timer
,
1563 [0x0d] = ioctl_allocate_iso_resource
,
1564 [0x0e] = ioctl_deallocate_iso_resource
,
1565 [0x0f] = ioctl_allocate_iso_resource_once
,
1566 [0x10] = ioctl_deallocate_iso_resource_once
,
1567 [0x11] = ioctl_get_speed
,
1568 [0x12] = ioctl_send_broadcast_request
,
1569 [0x13] = ioctl_send_stream_packet
,
1570 [0x14] = ioctl_get_cycle_timer2
,
1571 [0x15] = ioctl_send_phy_packet
,
1572 [0x16] = ioctl_receive_phy_packets
,
1573 [0x17] = ioctl_set_iso_channels
,
1576 static int dispatch_ioctl(struct client
*client
,
1577 unsigned int cmd
, void __user
*arg
)
1579 union ioctl_arg buffer
;
1582 if (fw_device_is_shutdown(client
->device
))
1585 if (_IOC_TYPE(cmd
) != '#' ||
1586 _IOC_NR(cmd
) >= ARRAY_SIZE(ioctl_handlers
) ||
1587 _IOC_SIZE(cmd
) > sizeof(buffer
))
1590 if (_IOC_DIR(cmd
) == _IOC_READ
)
1591 memset(&buffer
, 0, _IOC_SIZE(cmd
));
1593 if (_IOC_DIR(cmd
) & _IOC_WRITE
)
1594 if (copy_from_user(&buffer
, arg
, _IOC_SIZE(cmd
)))
1597 ret
= ioctl_handlers
[_IOC_NR(cmd
)](client
, &buffer
);
1601 if (_IOC_DIR(cmd
) & _IOC_READ
)
1602 if (copy_to_user(arg
, &buffer
, _IOC_SIZE(cmd
)))
1608 static long fw_device_op_ioctl(struct file
*file
,
1609 unsigned int cmd
, unsigned long arg
)
1611 return dispatch_ioctl(file
->private_data
, cmd
, (void __user
*)arg
);
1614 #ifdef CONFIG_COMPAT
1615 static long fw_device_op_compat_ioctl(struct file
*file
,
1616 unsigned int cmd
, unsigned long arg
)
1618 return dispatch_ioctl(file
->private_data
, cmd
, compat_ptr(arg
));
1622 static int fw_device_op_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1624 struct client
*client
= file
->private_data
;
1625 enum dma_data_direction direction
;
1627 int page_count
, ret
;
1629 if (fw_device_is_shutdown(client
->device
))
1632 /* FIXME: We could support multiple buffers, but we don't. */
1633 if (client
->buffer
.pages
!= NULL
)
1636 if (!(vma
->vm_flags
& VM_SHARED
))
1639 if (vma
->vm_start
& ~PAGE_MASK
)
1642 client
->vm_start
= vma
->vm_start
;
1643 size
= vma
->vm_end
- vma
->vm_start
;
1644 page_count
= size
>> PAGE_SHIFT
;
1645 if (size
& ~PAGE_MASK
)
1648 if (vma
->vm_flags
& VM_WRITE
)
1649 direction
= DMA_TO_DEVICE
;
1651 direction
= DMA_FROM_DEVICE
;
1653 ret
= fw_iso_buffer_init(&client
->buffer
, client
->device
->card
,
1654 page_count
, direction
);
1658 ret
= fw_iso_buffer_map(&client
->buffer
, vma
);
1660 fw_iso_buffer_destroy(&client
->buffer
, client
->device
->card
);
1665 static int is_outbound_transaction_resource(int id
, void *p
, void *data
)
1667 struct client_resource
*resource
= p
;
1669 return resource
->release
== release_transaction
;
1672 static int has_outbound_transactions(struct client
*client
)
1676 spin_lock_irq(&client
->lock
);
1677 ret
= idr_for_each(&client
->resource_idr
,
1678 is_outbound_transaction_resource
, NULL
);
1679 spin_unlock_irq(&client
->lock
);
1684 static int shutdown_resource(int id
, void *p
, void *data
)
1686 struct client_resource
*resource
= p
;
1687 struct client
*client
= data
;
1689 resource
->release(client
, resource
);
1695 static int fw_device_op_release(struct inode
*inode
, struct file
*file
)
1697 struct client
*client
= file
->private_data
;
1698 struct event
*event
, *next_event
;
1700 spin_lock_irq(&client
->device
->card
->lock
);
1701 list_del(&client
->phy_receiver_link
);
1702 spin_unlock_irq(&client
->device
->card
->lock
);
1704 mutex_lock(&client
->device
->client_list_mutex
);
1705 list_del(&client
->link
);
1706 mutex_unlock(&client
->device
->client_list_mutex
);
1708 if (client
->iso_context
)
1709 fw_iso_context_destroy(client
->iso_context
);
1711 if (client
->buffer
.pages
)
1712 fw_iso_buffer_destroy(&client
->buffer
, client
->device
->card
);
1714 /* Freeze client->resource_idr and client->event_list */
1715 spin_lock_irq(&client
->lock
);
1716 client
->in_shutdown
= true;
1717 spin_unlock_irq(&client
->lock
);
1719 wait_event(client
->tx_flush_wait
, !has_outbound_transactions(client
));
1721 idr_for_each(&client
->resource_idr
, shutdown_resource
, client
);
1722 idr_remove_all(&client
->resource_idr
);
1723 idr_destroy(&client
->resource_idr
);
1725 list_for_each_entry_safe(event
, next_event
, &client
->event_list
, link
)
1733 static unsigned int fw_device_op_poll(struct file
*file
, poll_table
* pt
)
1735 struct client
*client
= file
->private_data
;
1736 unsigned int mask
= 0;
1738 poll_wait(file
, &client
->wait
, pt
);
1740 if (fw_device_is_shutdown(client
->device
))
1741 mask
|= POLLHUP
| POLLERR
;
1742 if (!list_empty(&client
->event_list
))
1743 mask
|= POLLIN
| POLLRDNORM
;
1748 const struct file_operations fw_device_ops
= {
1749 .owner
= THIS_MODULE
,
1750 .llseek
= no_llseek
,
1751 .open
= fw_device_op_open
,
1752 .read
= fw_device_op_read
,
1753 .unlocked_ioctl
= fw_device_op_ioctl
,
1754 .mmap
= fw_device_op_mmap
,
1755 .release
= fw_device_op_release
,
1756 .poll
= fw_device_op_poll
,
1757 #ifdef CONFIG_COMPAT
1758 .compat_ioctl
= fw_device_op_compat_ioctl
,