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/dma-mapping.h>
26 #include <linux/errno.h>
27 #include <linux/firewire.h>
28 #include <linux/firewire-cdev.h>
29 #include <linux/idr.h>
30 #include <linux/irqflags.h>
31 #include <linux/jiffies.h>
32 #include <linux/kernel.h>
33 #include <linux/kref.h>
35 #include <linux/module.h>
36 #include <linux/mutex.h>
37 #include <linux/poll.h>
38 #include <linux/sched.h> /* required for linux/wait.h */
39 #include <linux/slab.h>
40 #include <linux/spinlock.h>
41 #include <linux/string.h>
42 #include <linux/time.h>
43 #include <linux/uaccess.h>
44 #include <linux/vmalloc.h>
45 #include <linux/wait.h>
46 #include <linux/workqueue.h>
52 * ABI version history is documented in linux/firewire-cdev.h.
54 #define FW_CDEV_KERNEL_VERSION 5
55 #define FW_CDEV_VERSION_EVENT_REQUEST2 4
56 #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4
57 #define FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW 5
61 struct fw_device
*device
;
65 struct idr resource_idr
;
66 struct list_head event_list
;
67 wait_queue_head_t wait
;
68 wait_queue_head_t tx_flush_wait
;
69 u64 bus_reset_closure
;
71 struct fw_iso_context
*iso_context
;
73 struct fw_iso_buffer buffer
;
74 unsigned long vm_start
;
75 bool buffer_is_mapped
;
77 struct list_head phy_receiver_link
;
78 u64 phy_receiver_closure
;
80 struct list_head link
;
84 static inline void client_get(struct client
*client
)
86 kref_get(&client
->kref
);
89 static void client_release(struct kref
*kref
)
91 struct client
*client
= container_of(kref
, struct client
, kref
);
93 fw_device_put(client
->device
);
97 static void client_put(struct client
*client
)
99 kref_put(&client
->kref
, client_release
);
102 struct client_resource
;
103 typedef void (*client_resource_release_fn_t
)(struct client
*,
104 struct client_resource
*);
105 struct client_resource
{
106 client_resource_release_fn_t release
;
110 struct address_handler_resource
{
111 struct client_resource resource
;
112 struct fw_address_handler handler
;
114 struct client
*client
;
117 struct outbound_transaction_resource
{
118 struct client_resource resource
;
119 struct fw_transaction transaction
;
122 struct inbound_transaction_resource
{
123 struct client_resource resource
;
124 struct fw_card
*card
;
125 struct fw_request
*request
;
130 struct descriptor_resource
{
131 struct client_resource resource
;
132 struct fw_descriptor descriptor
;
136 struct iso_resource
{
137 struct client_resource resource
;
138 struct client
*client
;
139 /* Schedule work and access todo only with client->lock held. */
140 struct delayed_work work
;
141 enum {ISO_RES_ALLOC
, ISO_RES_REALLOC
, ISO_RES_DEALLOC
,
142 ISO_RES_ALLOC_ONCE
, ISO_RES_DEALLOC_ONCE
,} todo
;
146 struct iso_resource_event
*e_alloc
, *e_dealloc
;
149 static void release_iso_resource(struct client
*, struct client_resource
*);
151 static void schedule_iso_resource(struct iso_resource
*r
, unsigned long delay
)
153 client_get(r
->client
);
154 if (!queue_delayed_work(fw_workqueue
, &r
->work
, delay
))
155 client_put(r
->client
);
158 static void schedule_if_iso_resource(struct client_resource
*resource
)
160 if (resource
->release
== release_iso_resource
)
161 schedule_iso_resource(container_of(resource
,
162 struct iso_resource
, resource
), 0);
166 * dequeue_event() just kfree()'s the event, so the event has to be
167 * the first field in a struct XYZ_event.
170 struct { void *data
; size_t size
; } v
[2];
171 struct list_head link
;
174 struct bus_reset_event
{
176 struct fw_cdev_event_bus_reset reset
;
179 struct outbound_transaction_event
{
181 struct client
*client
;
182 struct outbound_transaction_resource r
;
183 struct fw_cdev_event_response response
;
186 struct inbound_transaction_event
{
189 struct fw_cdev_event_request request
;
190 struct fw_cdev_event_request2 request2
;
194 struct iso_interrupt_event
{
196 struct fw_cdev_event_iso_interrupt interrupt
;
199 struct iso_interrupt_mc_event
{
201 struct fw_cdev_event_iso_interrupt_mc interrupt
;
204 struct iso_resource_event
{
206 struct fw_cdev_event_iso_resource iso_resource
;
209 struct outbound_phy_packet_event
{
211 struct client
*client
;
213 struct fw_cdev_event_phy_packet phy_packet
;
216 struct inbound_phy_packet_event
{
218 struct fw_cdev_event_phy_packet phy_packet
;
222 static void __user
*u64_to_uptr(u64 value
)
224 if (is_compat_task())
225 return compat_ptr(value
);
227 return (void __user
*)(unsigned long)value
;
230 static u64
uptr_to_u64(void __user
*ptr
)
232 if (is_compat_task())
233 return ptr_to_compat(ptr
);
235 return (u64
)(unsigned long)ptr
;
238 static inline void __user
*u64_to_uptr(u64 value
)
240 return (void __user
*)(unsigned long)value
;
243 static inline u64
uptr_to_u64(void __user
*ptr
)
245 return (u64
)(unsigned long)ptr
;
247 #endif /* CONFIG_COMPAT */
249 static int fw_device_op_open(struct inode
*inode
, struct file
*file
)
251 struct fw_device
*device
;
252 struct client
*client
;
254 device
= fw_device_get_by_devt(inode
->i_rdev
);
258 if (fw_device_is_shutdown(device
)) {
259 fw_device_put(device
);
263 client
= kzalloc(sizeof(*client
), GFP_KERNEL
);
264 if (client
== NULL
) {
265 fw_device_put(device
);
269 client
->device
= device
;
270 spin_lock_init(&client
->lock
);
271 idr_init(&client
->resource_idr
);
272 INIT_LIST_HEAD(&client
->event_list
);
273 init_waitqueue_head(&client
->wait
);
274 init_waitqueue_head(&client
->tx_flush_wait
);
275 INIT_LIST_HEAD(&client
->phy_receiver_link
);
276 INIT_LIST_HEAD(&client
->link
);
277 kref_init(&client
->kref
);
279 file
->private_data
= client
;
281 return nonseekable_open(inode
, file
);
284 static void queue_event(struct client
*client
, struct event
*event
,
285 void *data0
, size_t size0
, void *data1
, size_t size1
)
289 event
->v
[0].data
= data0
;
290 event
->v
[0].size
= size0
;
291 event
->v
[1].data
= data1
;
292 event
->v
[1].size
= size1
;
294 spin_lock_irqsave(&client
->lock
, flags
);
295 if (client
->in_shutdown
)
298 list_add_tail(&event
->link
, &client
->event_list
);
299 spin_unlock_irqrestore(&client
->lock
, flags
);
301 wake_up_interruptible(&client
->wait
);
304 static int dequeue_event(struct client
*client
,
305 char __user
*buffer
, size_t count
)
311 ret
= wait_event_interruptible(client
->wait
,
312 !list_empty(&client
->event_list
) ||
313 fw_device_is_shutdown(client
->device
));
317 if (list_empty(&client
->event_list
) &&
318 fw_device_is_shutdown(client
->device
))
321 spin_lock_irq(&client
->lock
);
322 event
= list_first_entry(&client
->event_list
, struct event
, link
);
323 list_del(&event
->link
);
324 spin_unlock_irq(&client
->lock
);
327 for (i
= 0; i
< ARRAY_SIZE(event
->v
) && total
< count
; i
++) {
328 size
= min(event
->v
[i
].size
, count
- total
);
329 if (copy_to_user(buffer
+ total
, event
->v
[i
].data
, size
)) {
343 static ssize_t
fw_device_op_read(struct file
*file
, char __user
*buffer
,
344 size_t count
, loff_t
*offset
)
346 struct client
*client
= file
->private_data
;
348 return dequeue_event(client
, buffer
, count
);
351 static void fill_bus_reset_event(struct fw_cdev_event_bus_reset
*event
,
352 struct client
*client
)
354 struct fw_card
*card
= client
->device
->card
;
356 spin_lock_irq(&card
->lock
);
358 event
->closure
= client
->bus_reset_closure
;
359 event
->type
= FW_CDEV_EVENT_BUS_RESET
;
360 event
->generation
= client
->device
->generation
;
361 event
->node_id
= client
->device
->node_id
;
362 event
->local_node_id
= card
->local_node
->node_id
;
363 event
->bm_node_id
= card
->bm_node_id
;
364 event
->irm_node_id
= card
->irm_node
->node_id
;
365 event
->root_node_id
= card
->root_node
->node_id
;
367 spin_unlock_irq(&card
->lock
);
370 static void for_each_client(struct fw_device
*device
,
371 void (*callback
)(struct client
*client
))
375 mutex_lock(&device
->client_list_mutex
);
376 list_for_each_entry(c
, &device
->client_list
, link
)
378 mutex_unlock(&device
->client_list_mutex
);
381 static int schedule_reallocations(int id
, void *p
, void *data
)
383 schedule_if_iso_resource(p
);
388 static void queue_bus_reset_event(struct client
*client
)
390 struct bus_reset_event
*e
;
392 e
= kzalloc(sizeof(*e
), GFP_KERNEL
);
396 fill_bus_reset_event(&e
->reset
, client
);
398 queue_event(client
, &e
->event
,
399 &e
->reset
, sizeof(e
->reset
), NULL
, 0);
401 spin_lock_irq(&client
->lock
);
402 idr_for_each(&client
->resource_idr
, schedule_reallocations
, client
);
403 spin_unlock_irq(&client
->lock
);
406 void fw_device_cdev_update(struct fw_device
*device
)
408 for_each_client(device
, queue_bus_reset_event
);
411 static void wake_up_client(struct client
*client
)
413 wake_up_interruptible(&client
->wait
);
416 void fw_device_cdev_remove(struct fw_device
*device
)
418 for_each_client(device
, wake_up_client
);
422 struct fw_cdev_get_info get_info
;
423 struct fw_cdev_send_request send_request
;
424 struct fw_cdev_allocate allocate
;
425 struct fw_cdev_deallocate deallocate
;
426 struct fw_cdev_send_response send_response
;
427 struct fw_cdev_initiate_bus_reset initiate_bus_reset
;
428 struct fw_cdev_add_descriptor add_descriptor
;
429 struct fw_cdev_remove_descriptor remove_descriptor
;
430 struct fw_cdev_create_iso_context create_iso_context
;
431 struct fw_cdev_queue_iso queue_iso
;
432 struct fw_cdev_start_iso start_iso
;
433 struct fw_cdev_stop_iso stop_iso
;
434 struct fw_cdev_get_cycle_timer get_cycle_timer
;
435 struct fw_cdev_allocate_iso_resource allocate_iso_resource
;
436 struct fw_cdev_send_stream_packet send_stream_packet
;
437 struct fw_cdev_get_cycle_timer2 get_cycle_timer2
;
438 struct fw_cdev_send_phy_packet send_phy_packet
;
439 struct fw_cdev_receive_phy_packets receive_phy_packets
;
440 struct fw_cdev_set_iso_channels set_iso_channels
;
441 struct fw_cdev_flush_iso flush_iso
;
444 static int ioctl_get_info(struct client
*client
, union ioctl_arg
*arg
)
446 struct fw_cdev_get_info
*a
= &arg
->get_info
;
447 struct fw_cdev_event_bus_reset bus_reset
;
448 unsigned long ret
= 0;
450 client
->version
= a
->version
;
451 a
->version
= FW_CDEV_KERNEL_VERSION
;
452 a
->card
= client
->device
->card
->index
;
454 down_read(&fw_device_rwsem
);
457 size_t want
= a
->rom_length
;
458 size_t have
= client
->device
->config_rom_length
* 4;
460 ret
= copy_to_user(u64_to_uptr(a
->rom
),
461 client
->device
->config_rom
, min(want
, have
));
463 a
->rom_length
= client
->device
->config_rom_length
* 4;
465 up_read(&fw_device_rwsem
);
470 mutex_lock(&client
->device
->client_list_mutex
);
472 client
->bus_reset_closure
= a
->bus_reset_closure
;
473 if (a
->bus_reset
!= 0) {
474 fill_bus_reset_event(&bus_reset
, client
);
475 /* unaligned size of bus_reset is 36 bytes */
476 ret
= copy_to_user(u64_to_uptr(a
->bus_reset
), &bus_reset
, 36);
478 if (ret
== 0 && list_empty(&client
->link
))
479 list_add_tail(&client
->link
, &client
->device
->client_list
);
481 mutex_unlock(&client
->device
->client_list_mutex
);
483 return ret
? -EFAULT
: 0;
486 static int add_client_resource(struct client
*client
,
487 struct client_resource
*resource
, gfp_t gfp_mask
)
489 bool preload
= gfpflags_allow_blocking(gfp_mask
);
494 idr_preload(gfp_mask
);
495 spin_lock_irqsave(&client
->lock
, flags
);
497 if (client
->in_shutdown
)
500 ret
= idr_alloc(&client
->resource_idr
, resource
, 0, 0,
503 resource
->handle
= ret
;
505 schedule_if_iso_resource(resource
);
508 spin_unlock_irqrestore(&client
->lock
, flags
);
512 return ret
< 0 ? ret
: 0;
515 static int release_client_resource(struct client
*client
, u32 handle
,
516 client_resource_release_fn_t release
,
517 struct client_resource
**return_resource
)
519 struct client_resource
*resource
;
521 spin_lock_irq(&client
->lock
);
522 if (client
->in_shutdown
)
525 resource
= idr_find(&client
->resource_idr
, handle
);
526 if (resource
&& resource
->release
== release
)
527 idr_remove(&client
->resource_idr
, handle
);
528 spin_unlock_irq(&client
->lock
);
530 if (!(resource
&& resource
->release
== release
))
534 *return_resource
= resource
;
536 resource
->release(client
, resource
);
543 static void release_transaction(struct client
*client
,
544 struct client_resource
*resource
)
548 static void complete_transaction(struct fw_card
*card
, int rcode
,
549 void *payload
, size_t length
, void *data
)
551 struct outbound_transaction_event
*e
= data
;
552 struct fw_cdev_event_response
*rsp
= &e
->response
;
553 struct client
*client
= e
->client
;
556 if (length
< rsp
->length
)
557 rsp
->length
= length
;
558 if (rcode
== RCODE_COMPLETE
)
559 memcpy(rsp
->data
, payload
, rsp
->length
);
561 spin_lock_irqsave(&client
->lock
, flags
);
562 idr_remove(&client
->resource_idr
, e
->r
.resource
.handle
);
563 if (client
->in_shutdown
)
564 wake_up(&client
->tx_flush_wait
);
565 spin_unlock_irqrestore(&client
->lock
, flags
);
567 rsp
->type
= FW_CDEV_EVENT_RESPONSE
;
571 * In the case that sizeof(*rsp) doesn't align with the position of the
572 * data, and the read is short, preserve an extra copy of the data
573 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
574 * for short reads and some apps depended on it, this is both safe
575 * and prudent for compatibility.
577 if (rsp
->length
<= sizeof(*rsp
) - offsetof(typeof(*rsp
), data
))
578 queue_event(client
, &e
->event
, rsp
, sizeof(*rsp
),
579 rsp
->data
, rsp
->length
);
581 queue_event(client
, &e
->event
, rsp
, sizeof(*rsp
) + rsp
->length
,
584 /* Drop the idr's reference */
588 static int init_request(struct client
*client
,
589 struct fw_cdev_send_request
*request
,
590 int destination_id
, int speed
)
592 struct outbound_transaction_event
*e
;
595 if (request
->tcode
!= TCODE_STREAM_DATA
&&
596 (request
->length
> 4096 || request
->length
> 512 << speed
))
599 if (request
->tcode
== TCODE_WRITE_QUADLET_REQUEST
&&
603 e
= kmalloc(sizeof(*e
) + request
->length
, GFP_KERNEL
);
608 e
->response
.length
= request
->length
;
609 e
->response
.closure
= request
->closure
;
612 copy_from_user(e
->response
.data
,
613 u64_to_uptr(request
->data
), request
->length
)) {
618 e
->r
.resource
.release
= release_transaction
;
619 ret
= add_client_resource(client
, &e
->r
.resource
, GFP_KERNEL
);
623 fw_send_request(client
->device
->card
, &e
->r
.transaction
,
624 request
->tcode
, destination_id
, request
->generation
,
625 speed
, request
->offset
, e
->response
.data
,
626 request
->length
, complete_transaction
, e
);
635 static int ioctl_send_request(struct client
*client
, union ioctl_arg
*arg
)
637 switch (arg
->send_request
.tcode
) {
638 case TCODE_WRITE_QUADLET_REQUEST
:
639 case TCODE_WRITE_BLOCK_REQUEST
:
640 case TCODE_READ_QUADLET_REQUEST
:
641 case TCODE_READ_BLOCK_REQUEST
:
642 case TCODE_LOCK_MASK_SWAP
:
643 case TCODE_LOCK_COMPARE_SWAP
:
644 case TCODE_LOCK_FETCH_ADD
:
645 case TCODE_LOCK_LITTLE_ADD
:
646 case TCODE_LOCK_BOUNDED_ADD
:
647 case TCODE_LOCK_WRAP_ADD
:
648 case TCODE_LOCK_VENDOR_DEPENDENT
:
654 return init_request(client
, &arg
->send_request
, client
->device
->node_id
,
655 client
->device
->max_speed
);
658 static inline bool is_fcp_request(struct fw_request
*request
)
660 return request
== NULL
;
663 static void release_request(struct client
*client
,
664 struct client_resource
*resource
)
666 struct inbound_transaction_resource
*r
= container_of(resource
,
667 struct inbound_transaction_resource
, resource
);
669 if (is_fcp_request(r
->request
))
672 fw_send_response(r
->card
, r
->request
, RCODE_CONFLICT_ERROR
);
674 fw_card_put(r
->card
);
678 static void handle_request(struct fw_card
*card
, struct fw_request
*request
,
679 int tcode
, int destination
, int source
,
680 int generation
, unsigned long long offset
,
681 void *payload
, size_t length
, void *callback_data
)
683 struct address_handler_resource
*handler
= callback_data
;
684 struct inbound_transaction_resource
*r
;
685 struct inbound_transaction_event
*e
;
687 void *fcp_frame
= NULL
;
690 /* card may be different from handler->client->device->card */
693 r
= kmalloc(sizeof(*r
), GFP_ATOMIC
);
694 e
= kmalloc(sizeof(*e
), GFP_ATOMIC
);
695 if (r
== NULL
|| e
== NULL
)
699 r
->request
= request
;
703 if (is_fcp_request(request
)) {
705 * FIXME: Let core-transaction.c manage a
706 * single reference-counted copy?
708 fcp_frame
= kmemdup(payload
, length
, GFP_ATOMIC
);
709 if (fcp_frame
== NULL
)
715 r
->resource
.release
= release_request
;
716 ret
= add_client_resource(handler
->client
, &r
->resource
, GFP_ATOMIC
);
720 if (handler
->client
->version
< FW_CDEV_VERSION_EVENT_REQUEST2
) {
721 struct fw_cdev_event_request
*req
= &e
->req
.request
;
724 tcode
= TCODE_LOCK_REQUEST
;
726 req
->type
= FW_CDEV_EVENT_REQUEST
;
728 req
->offset
= offset
;
729 req
->length
= length
;
730 req
->handle
= r
->resource
.handle
;
731 req
->closure
= handler
->closure
;
732 event_size0
= sizeof(*req
);
734 struct fw_cdev_event_request2
*req
= &e
->req
.request2
;
736 req
->type
= FW_CDEV_EVENT_REQUEST2
;
738 req
->offset
= offset
;
739 req
->source_node_id
= source
;
740 req
->destination_node_id
= destination
;
741 req
->card
= card
->index
;
742 req
->generation
= generation
;
743 req
->length
= length
;
744 req
->handle
= r
->resource
.handle
;
745 req
->closure
= handler
->closure
;
746 event_size0
= sizeof(*req
);
749 queue_event(handler
->client
, &e
->event
,
750 &e
->req
, event_size0
, r
->data
, length
);
758 if (!is_fcp_request(request
))
759 fw_send_response(card
, request
, RCODE_CONFLICT_ERROR
);
764 static void release_address_handler(struct client
*client
,
765 struct client_resource
*resource
)
767 struct address_handler_resource
*r
=
768 container_of(resource
, struct address_handler_resource
, resource
);
770 fw_core_remove_address_handler(&r
->handler
);
774 static int ioctl_allocate(struct client
*client
, union ioctl_arg
*arg
)
776 struct fw_cdev_allocate
*a
= &arg
->allocate
;
777 struct address_handler_resource
*r
;
778 struct fw_address_region region
;
781 r
= kmalloc(sizeof(*r
), GFP_KERNEL
);
785 region
.start
= a
->offset
;
786 if (client
->version
< FW_CDEV_VERSION_ALLOCATE_REGION_END
)
787 region
.end
= a
->offset
+ a
->length
;
789 region
.end
= a
->region_end
;
791 r
->handler
.length
= a
->length
;
792 r
->handler
.address_callback
= handle_request
;
793 r
->handler
.callback_data
= r
;
794 r
->closure
= a
->closure
;
797 ret
= fw_core_add_address_handler(&r
->handler
, ®ion
);
802 a
->offset
= r
->handler
.offset
;
804 r
->resource
.release
= release_address_handler
;
805 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
807 release_address_handler(client
, &r
->resource
);
810 a
->handle
= r
->resource
.handle
;
815 static int ioctl_deallocate(struct client
*client
, union ioctl_arg
*arg
)
817 return release_client_resource(client
, arg
->deallocate
.handle
,
818 release_address_handler
, NULL
);
821 static int ioctl_send_response(struct client
*client
, union ioctl_arg
*arg
)
823 struct fw_cdev_send_response
*a
= &arg
->send_response
;
824 struct client_resource
*resource
;
825 struct inbound_transaction_resource
*r
;
828 if (release_client_resource(client
, a
->handle
,
829 release_request
, &resource
) < 0)
832 r
= container_of(resource
, struct inbound_transaction_resource
,
834 if (is_fcp_request(r
->request
))
837 if (a
->length
!= fw_get_response_length(r
->request
)) {
842 if (copy_from_user(r
->data
, u64_to_uptr(a
->data
), a
->length
)) {
847 fw_send_response(r
->card
, r
->request
, a
->rcode
);
849 fw_card_put(r
->card
);
855 static int ioctl_initiate_bus_reset(struct client
*client
, union ioctl_arg
*arg
)
857 fw_schedule_bus_reset(client
->device
->card
, true,
858 arg
->initiate_bus_reset
.type
== FW_CDEV_SHORT_RESET
);
862 static void release_descriptor(struct client
*client
,
863 struct client_resource
*resource
)
865 struct descriptor_resource
*r
=
866 container_of(resource
, struct descriptor_resource
, resource
);
868 fw_core_remove_descriptor(&r
->descriptor
);
872 static int ioctl_add_descriptor(struct client
*client
, union ioctl_arg
*arg
)
874 struct fw_cdev_add_descriptor
*a
= &arg
->add_descriptor
;
875 struct descriptor_resource
*r
;
878 /* Access policy: Allow this ioctl only on local nodes' device files. */
879 if (!client
->device
->is_local
)
885 r
= kmalloc(sizeof(*r
) + a
->length
* 4, GFP_KERNEL
);
889 if (copy_from_user(r
->data
, u64_to_uptr(a
->data
), a
->length
* 4)) {
894 r
->descriptor
.length
= a
->length
;
895 r
->descriptor
.immediate
= a
->immediate
;
896 r
->descriptor
.key
= a
->key
;
897 r
->descriptor
.data
= r
->data
;
899 ret
= fw_core_add_descriptor(&r
->descriptor
);
903 r
->resource
.release
= release_descriptor
;
904 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
906 fw_core_remove_descriptor(&r
->descriptor
);
909 a
->handle
= r
->resource
.handle
;
918 static int ioctl_remove_descriptor(struct client
*client
, union ioctl_arg
*arg
)
920 return release_client_resource(client
, arg
->remove_descriptor
.handle
,
921 release_descriptor
, NULL
);
924 static void iso_callback(struct fw_iso_context
*context
, u32 cycle
,
925 size_t header_length
, void *header
, void *data
)
927 struct client
*client
= data
;
928 struct iso_interrupt_event
*e
;
930 e
= kmalloc(sizeof(*e
) + header_length
, GFP_ATOMIC
);
934 e
->interrupt
.type
= FW_CDEV_EVENT_ISO_INTERRUPT
;
935 e
->interrupt
.closure
= client
->iso_closure
;
936 e
->interrupt
.cycle
= cycle
;
937 e
->interrupt
.header_length
= header_length
;
938 memcpy(e
->interrupt
.header
, header
, header_length
);
939 queue_event(client
, &e
->event
, &e
->interrupt
,
940 sizeof(e
->interrupt
) + header_length
, NULL
, 0);
943 static void iso_mc_callback(struct fw_iso_context
*context
,
944 dma_addr_t completed
, void *data
)
946 struct client
*client
= data
;
947 struct iso_interrupt_mc_event
*e
;
949 e
= kmalloc(sizeof(*e
), GFP_ATOMIC
);
953 e
->interrupt
.type
= FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL
;
954 e
->interrupt
.closure
= client
->iso_closure
;
955 e
->interrupt
.completed
= fw_iso_buffer_lookup(&client
->buffer
,
957 queue_event(client
, &e
->event
, &e
->interrupt
,
958 sizeof(e
->interrupt
), NULL
, 0);
961 static enum dma_data_direction
iso_dma_direction(struct fw_iso_context
*context
)
963 if (context
->type
== FW_ISO_CONTEXT_TRANSMIT
)
964 return DMA_TO_DEVICE
;
966 return DMA_FROM_DEVICE
;
969 static int ioctl_create_iso_context(struct client
*client
, union ioctl_arg
*arg
)
971 struct fw_cdev_create_iso_context
*a
= &arg
->create_iso_context
;
972 struct fw_iso_context
*context
;
973 fw_iso_callback_t cb
;
976 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT
!= FW_ISO_CONTEXT_TRANSMIT
||
977 FW_CDEV_ISO_CONTEXT_RECEIVE
!= FW_ISO_CONTEXT_RECEIVE
||
978 FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL
!=
979 FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL
);
982 case FW_ISO_CONTEXT_TRANSMIT
:
983 if (a
->speed
> SCODE_3200
|| a
->channel
> 63)
989 case FW_ISO_CONTEXT_RECEIVE
:
990 if (a
->header_size
< 4 || (a
->header_size
& 3) ||
997 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL
:
998 cb
= (fw_iso_callback_t
)iso_mc_callback
;
1005 context
= fw_iso_context_create(client
->device
->card
, a
->type
,
1006 a
->channel
, a
->speed
, a
->header_size
, cb
, client
);
1007 if (IS_ERR(context
))
1008 return PTR_ERR(context
);
1009 if (client
->version
< FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW
)
1010 context
->drop_overflow_headers
= true;
1012 /* We only support one context at this time. */
1013 spin_lock_irq(&client
->lock
);
1014 if (client
->iso_context
!= NULL
) {
1015 spin_unlock_irq(&client
->lock
);
1016 fw_iso_context_destroy(context
);
1020 if (!client
->buffer_is_mapped
) {
1021 ret
= fw_iso_buffer_map_dma(&client
->buffer
,
1022 client
->device
->card
,
1023 iso_dma_direction(context
));
1025 spin_unlock_irq(&client
->lock
);
1026 fw_iso_context_destroy(context
);
1030 client
->buffer_is_mapped
= true;
1032 client
->iso_closure
= a
->closure
;
1033 client
->iso_context
= context
;
1034 spin_unlock_irq(&client
->lock
);
1041 static int ioctl_set_iso_channels(struct client
*client
, union ioctl_arg
*arg
)
1043 struct fw_cdev_set_iso_channels
*a
= &arg
->set_iso_channels
;
1044 struct fw_iso_context
*ctx
= client
->iso_context
;
1046 if (ctx
== NULL
|| a
->handle
!= 0)
1049 return fw_iso_context_set_channels(ctx
, &a
->channels
);
1052 /* Macros for decoding the iso packet control header. */
1053 #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
1054 #define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
1055 #define GET_SKIP(v) (((v) >> 17) & 0x01)
1056 #define GET_TAG(v) (((v) >> 18) & 0x03)
1057 #define GET_SY(v) (((v) >> 20) & 0x0f)
1058 #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
1060 static int ioctl_queue_iso(struct client
*client
, union ioctl_arg
*arg
)
1062 struct fw_cdev_queue_iso
*a
= &arg
->queue_iso
;
1063 struct fw_cdev_iso_packet __user
*p
, *end
, *next
;
1064 struct fw_iso_context
*ctx
= client
->iso_context
;
1065 unsigned long payload
, buffer_end
, transmit_header_bytes
= 0;
1069 struct fw_iso_packet packet
;
1073 if (ctx
== NULL
|| a
->handle
!= 0)
1077 * If the user passes a non-NULL data pointer, has mmap()'ed
1078 * the iso buffer, and the pointer points inside the buffer,
1079 * we setup the payload pointers accordingly. Otherwise we
1080 * set them both to 0, which will still let packets with
1081 * payload_length == 0 through. In other words, if no packets
1082 * use the indirect payload, the iso buffer need not be mapped
1083 * and the a->data pointer is ignored.
1085 payload
= (unsigned long)a
->data
- client
->vm_start
;
1086 buffer_end
= client
->buffer
.page_count
<< PAGE_SHIFT
;
1087 if (a
->data
== 0 || client
->buffer
.pages
== NULL
||
1088 payload
>= buffer_end
) {
1093 if (ctx
->type
== FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL
&& payload
& 3)
1096 p
= (struct fw_cdev_iso_packet __user
*)u64_to_uptr(a
->packets
);
1097 if (!access_ok(VERIFY_READ
, p
, a
->size
))
1100 end
= (void __user
*)p
+ a
->size
;
1103 if (get_user(control
, &p
->control
))
1105 u
.packet
.payload_length
= GET_PAYLOAD_LENGTH(control
);
1106 u
.packet
.interrupt
= GET_INTERRUPT(control
);
1107 u
.packet
.skip
= GET_SKIP(control
);
1108 u
.packet
.tag
= GET_TAG(control
);
1109 u
.packet
.sy
= GET_SY(control
);
1110 u
.packet
.header_length
= GET_HEADER_LENGTH(control
);
1112 switch (ctx
->type
) {
1113 case FW_ISO_CONTEXT_TRANSMIT
:
1114 if (u
.packet
.header_length
& 3)
1116 transmit_header_bytes
= u
.packet
.header_length
;
1119 case FW_ISO_CONTEXT_RECEIVE
:
1120 if (u
.packet
.header_length
== 0 ||
1121 u
.packet
.header_length
% ctx
->header_size
!= 0)
1125 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL
:
1126 if (u
.packet
.payload_length
== 0 ||
1127 u
.packet
.payload_length
& 3)
1132 next
= (struct fw_cdev_iso_packet __user
*)
1133 &p
->header
[transmit_header_bytes
/ 4];
1136 if (__copy_from_user
1137 (u
.packet
.header
, p
->header
, transmit_header_bytes
))
1139 if (u
.packet
.skip
&& ctx
->type
== FW_ISO_CONTEXT_TRANSMIT
&&
1140 u
.packet
.header_length
+ u
.packet
.payload_length
> 0)
1142 if (payload
+ u
.packet
.payload_length
> buffer_end
)
1145 if (fw_iso_context_queue(ctx
, &u
.packet
,
1146 &client
->buffer
, payload
))
1150 payload
+= u
.packet
.payload_length
;
1153 fw_iso_context_queue_flush(ctx
);
1155 a
->size
-= uptr_to_u64(p
) - a
->packets
;
1156 a
->packets
= uptr_to_u64(p
);
1157 a
->data
= client
->vm_start
+ payload
;
1162 static int ioctl_start_iso(struct client
*client
, union ioctl_arg
*arg
)
1164 struct fw_cdev_start_iso
*a
= &arg
->start_iso
;
1167 FW_CDEV_ISO_CONTEXT_MATCH_TAG0
!= FW_ISO_CONTEXT_MATCH_TAG0
||
1168 FW_CDEV_ISO_CONTEXT_MATCH_TAG1
!= FW_ISO_CONTEXT_MATCH_TAG1
||
1169 FW_CDEV_ISO_CONTEXT_MATCH_TAG2
!= FW_ISO_CONTEXT_MATCH_TAG2
||
1170 FW_CDEV_ISO_CONTEXT_MATCH_TAG3
!= FW_ISO_CONTEXT_MATCH_TAG3
||
1171 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS
!= FW_ISO_CONTEXT_MATCH_ALL_TAGS
);
1173 if (client
->iso_context
== NULL
|| a
->handle
!= 0)
1176 if (client
->iso_context
->type
== FW_ISO_CONTEXT_RECEIVE
&&
1177 (a
->tags
== 0 || a
->tags
> 15 || a
->sync
> 15))
1180 return fw_iso_context_start(client
->iso_context
,
1181 a
->cycle
, a
->sync
, a
->tags
);
1184 static int ioctl_stop_iso(struct client
*client
, union ioctl_arg
*arg
)
1186 struct fw_cdev_stop_iso
*a
= &arg
->stop_iso
;
1188 if (client
->iso_context
== NULL
|| a
->handle
!= 0)
1191 return fw_iso_context_stop(client
->iso_context
);
1194 static int ioctl_flush_iso(struct client
*client
, union ioctl_arg
*arg
)
1196 struct fw_cdev_flush_iso
*a
= &arg
->flush_iso
;
1198 if (client
->iso_context
== NULL
|| a
->handle
!= 0)
1201 return fw_iso_context_flush_completions(client
->iso_context
);
1204 static int ioctl_get_cycle_timer2(struct client
*client
, union ioctl_arg
*arg
)
1206 struct fw_cdev_get_cycle_timer2
*a
= &arg
->get_cycle_timer2
;
1207 struct fw_card
*card
= client
->device
->card
;
1208 struct timespec ts
= {0, 0};
1212 local_irq_disable();
1214 cycle_time
= card
->driver
->read_csr(card
, CSR_CYCLE_TIME
);
1216 switch (a
->clk_id
) {
1217 case CLOCK_REALTIME
: getnstimeofday(&ts
); break;
1218 case CLOCK_MONOTONIC
: ktime_get_ts(&ts
); break;
1219 case CLOCK_MONOTONIC_RAW
: getrawmonotonic(&ts
); break;
1226 a
->tv_sec
= ts
.tv_sec
;
1227 a
->tv_nsec
= ts
.tv_nsec
;
1228 a
->cycle_timer
= cycle_time
;
1233 static int ioctl_get_cycle_timer(struct client
*client
, union ioctl_arg
*arg
)
1235 struct fw_cdev_get_cycle_timer
*a
= &arg
->get_cycle_timer
;
1236 struct fw_cdev_get_cycle_timer2 ct2
;
1238 ct2
.clk_id
= CLOCK_REALTIME
;
1239 ioctl_get_cycle_timer2(client
, (union ioctl_arg
*)&ct2
);
1241 a
->local_time
= ct2
.tv_sec
* USEC_PER_SEC
+ ct2
.tv_nsec
/ NSEC_PER_USEC
;
1242 a
->cycle_timer
= ct2
.cycle_timer
;
1247 static void iso_resource_work(struct work_struct
*work
)
1249 struct iso_resource_event
*e
;
1250 struct iso_resource
*r
=
1251 container_of(work
, struct iso_resource
, work
.work
);
1252 struct client
*client
= r
->client
;
1253 int generation
, channel
, bandwidth
, todo
;
1254 bool skip
, free
, success
;
1256 spin_lock_irq(&client
->lock
);
1257 generation
= client
->device
->generation
;
1259 /* Allow 1000ms grace period for other reallocations. */
1260 if (todo
== ISO_RES_ALLOC
&&
1261 time_before64(get_jiffies_64(),
1262 client
->device
->card
->reset_jiffies
+ HZ
)) {
1263 schedule_iso_resource(r
, DIV_ROUND_UP(HZ
, 3));
1266 /* We could be called twice within the same generation. */
1267 skip
= todo
== ISO_RES_REALLOC
&&
1268 r
->generation
== generation
;
1270 free
= todo
== ISO_RES_DEALLOC
||
1271 todo
== ISO_RES_ALLOC_ONCE
||
1272 todo
== ISO_RES_DEALLOC_ONCE
;
1273 r
->generation
= generation
;
1274 spin_unlock_irq(&client
->lock
);
1279 bandwidth
= r
->bandwidth
;
1281 fw_iso_resource_manage(client
->device
->card
, generation
,
1282 r
->channels
, &channel
, &bandwidth
,
1283 todo
== ISO_RES_ALLOC
||
1284 todo
== ISO_RES_REALLOC
||
1285 todo
== ISO_RES_ALLOC_ONCE
);
1287 * Is this generation outdated already? As long as this resource sticks
1288 * in the idr, it will be scheduled again for a newer generation or at
1291 if (channel
== -EAGAIN
&&
1292 (todo
== ISO_RES_ALLOC
|| todo
== ISO_RES_REALLOC
))
1295 success
= channel
>= 0 || bandwidth
> 0;
1297 spin_lock_irq(&client
->lock
);
1299 * Transit from allocation to reallocation, except if the client
1300 * requested deallocation in the meantime.
1302 if (r
->todo
== ISO_RES_ALLOC
)
1303 r
->todo
= ISO_RES_REALLOC
;
1305 * Allocation or reallocation failure? Pull this resource out of the
1306 * idr and prepare for deletion, unless the client is shutting down.
1308 if (r
->todo
== ISO_RES_REALLOC
&& !success
&&
1309 !client
->in_shutdown
&&
1310 idr_find(&client
->resource_idr
, r
->resource
.handle
)) {
1311 idr_remove(&client
->resource_idr
, r
->resource
.handle
);
1315 spin_unlock_irq(&client
->lock
);
1317 if (todo
== ISO_RES_ALLOC
&& channel
>= 0)
1318 r
->channels
= 1ULL << channel
;
1320 if (todo
== ISO_RES_REALLOC
&& success
)
1323 if (todo
== ISO_RES_ALLOC
|| todo
== ISO_RES_ALLOC_ONCE
) {
1328 r
->e_dealloc
= NULL
;
1330 e
->iso_resource
.handle
= r
->resource
.handle
;
1331 e
->iso_resource
.channel
= channel
;
1332 e
->iso_resource
.bandwidth
= bandwidth
;
1334 queue_event(client
, &e
->event
,
1335 &e
->iso_resource
, sizeof(e
->iso_resource
), NULL
, 0);
1338 cancel_delayed_work(&r
->work
);
1340 kfree(r
->e_dealloc
);
1347 static void release_iso_resource(struct client
*client
,
1348 struct client_resource
*resource
)
1350 struct iso_resource
*r
=
1351 container_of(resource
, struct iso_resource
, resource
);
1353 spin_lock_irq(&client
->lock
);
1354 r
->todo
= ISO_RES_DEALLOC
;
1355 schedule_iso_resource(r
, 0);
1356 spin_unlock_irq(&client
->lock
);
1359 static int init_iso_resource(struct client
*client
,
1360 struct fw_cdev_allocate_iso_resource
*request
, int todo
)
1362 struct iso_resource_event
*e1
, *e2
;
1363 struct iso_resource
*r
;
1366 if ((request
->channels
== 0 && request
->bandwidth
== 0) ||
1367 request
->bandwidth
> BANDWIDTH_AVAILABLE_INITIAL
)
1370 r
= kmalloc(sizeof(*r
), GFP_KERNEL
);
1371 e1
= kmalloc(sizeof(*e1
), GFP_KERNEL
);
1372 e2
= kmalloc(sizeof(*e2
), GFP_KERNEL
);
1373 if (r
== NULL
|| e1
== NULL
|| e2
== NULL
) {
1378 INIT_DELAYED_WORK(&r
->work
, iso_resource_work
);
1382 r
->channels
= request
->channels
;
1383 r
->bandwidth
= request
->bandwidth
;
1387 e1
->iso_resource
.closure
= request
->closure
;
1388 e1
->iso_resource
.type
= FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED
;
1389 e2
->iso_resource
.closure
= request
->closure
;
1390 e2
->iso_resource
.type
= FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED
;
1392 if (todo
== ISO_RES_ALLOC
) {
1393 r
->resource
.release
= release_iso_resource
;
1394 ret
= add_client_resource(client
, &r
->resource
, GFP_KERNEL
);
1398 r
->resource
.release
= NULL
;
1399 r
->resource
.handle
= -1;
1400 schedule_iso_resource(r
, 0);
1402 request
->handle
= r
->resource
.handle
;
1413 static int ioctl_allocate_iso_resource(struct client
*client
,
1414 union ioctl_arg
*arg
)
1416 return init_iso_resource(client
,
1417 &arg
->allocate_iso_resource
, ISO_RES_ALLOC
);
1420 static int ioctl_deallocate_iso_resource(struct client
*client
,
1421 union ioctl_arg
*arg
)
1423 return release_client_resource(client
,
1424 arg
->deallocate
.handle
, release_iso_resource
, NULL
);
1427 static int ioctl_allocate_iso_resource_once(struct client
*client
,
1428 union ioctl_arg
*arg
)
1430 return init_iso_resource(client
,
1431 &arg
->allocate_iso_resource
, ISO_RES_ALLOC_ONCE
);
1434 static int ioctl_deallocate_iso_resource_once(struct client
*client
,
1435 union ioctl_arg
*arg
)
1437 return init_iso_resource(client
,
1438 &arg
->allocate_iso_resource
, ISO_RES_DEALLOC_ONCE
);
1442 * Returns a speed code: Maximum speed to or from this device,
1443 * limited by the device's link speed, the local node's link speed,
1444 * and all PHY port speeds between the two links.
1446 static int ioctl_get_speed(struct client
*client
, union ioctl_arg
*arg
)
1448 return client
->device
->max_speed
;
1451 static int ioctl_send_broadcast_request(struct client
*client
,
1452 union ioctl_arg
*arg
)
1454 struct fw_cdev_send_request
*a
= &arg
->send_request
;
1457 case TCODE_WRITE_QUADLET_REQUEST
:
1458 case TCODE_WRITE_BLOCK_REQUEST
:
1464 /* Security policy: Only allow accesses to Units Space. */
1465 if (a
->offset
< CSR_REGISTER_BASE
+ CSR_CONFIG_ROM_END
)
1468 return init_request(client
, a
, LOCAL_BUS
| 0x3f, SCODE_100
);
1471 static int ioctl_send_stream_packet(struct client
*client
, union ioctl_arg
*arg
)
1473 struct fw_cdev_send_stream_packet
*a
= &arg
->send_stream_packet
;
1474 struct fw_cdev_send_request request
;
1477 if (a
->speed
> client
->device
->card
->link_speed
||
1478 a
->length
> 1024 << a
->speed
)
1481 if (a
->tag
> 3 || a
->channel
> 63 || a
->sy
> 15)
1484 dest
= fw_stream_packet_destination_id(a
->tag
, a
->channel
, a
->sy
);
1485 request
.tcode
= TCODE_STREAM_DATA
;
1486 request
.length
= a
->length
;
1487 request
.closure
= a
->closure
;
1488 request
.data
= a
->data
;
1489 request
.generation
= a
->generation
;
1491 return init_request(client
, &request
, dest
, a
->speed
);
1494 static void outbound_phy_packet_callback(struct fw_packet
*packet
,
1495 struct fw_card
*card
, int status
)
1497 struct outbound_phy_packet_event
*e
=
1498 container_of(packet
, struct outbound_phy_packet_event
, p
);
1502 case ACK_COMPLETE
: e
->phy_packet
.rcode
= RCODE_COMPLETE
; break;
1503 /* should never happen with PHY packets: */
1504 case ACK_PENDING
: e
->phy_packet
.rcode
= RCODE_COMPLETE
; break;
1507 case ACK_BUSY_B
: e
->phy_packet
.rcode
= RCODE_BUSY
; break;
1508 case ACK_DATA_ERROR
: e
->phy_packet
.rcode
= RCODE_DATA_ERROR
; break;
1509 case ACK_TYPE_ERROR
: e
->phy_packet
.rcode
= RCODE_TYPE_ERROR
; break;
1510 /* stale generation; cancelled; on certain controllers: no ack */
1511 default: e
->phy_packet
.rcode
= status
; break;
1513 e
->phy_packet
.data
[0] = packet
->timestamp
;
1515 queue_event(e
->client
, &e
->event
, &e
->phy_packet
,
1516 sizeof(e
->phy_packet
) + e
->phy_packet
.length
, NULL
, 0);
1517 client_put(e
->client
);
1520 static int ioctl_send_phy_packet(struct client
*client
, union ioctl_arg
*arg
)
1522 struct fw_cdev_send_phy_packet
*a
= &arg
->send_phy_packet
;
1523 struct fw_card
*card
= client
->device
->card
;
1524 struct outbound_phy_packet_event
*e
;
1526 /* Access policy: Allow this ioctl only on local nodes' device files. */
1527 if (!client
->device
->is_local
)
1530 e
= kzalloc(sizeof(*e
) + 4, GFP_KERNEL
);
1536 e
->p
.speed
= SCODE_100
;
1537 e
->p
.generation
= a
->generation
;
1538 e
->p
.header
[0] = TCODE_LINK_INTERNAL
<< 4;
1539 e
->p
.header
[1] = a
->data
[0];
1540 e
->p
.header
[2] = a
->data
[1];
1541 e
->p
.header_length
= 12;
1542 e
->p
.callback
= outbound_phy_packet_callback
;
1543 e
->phy_packet
.closure
= a
->closure
;
1544 e
->phy_packet
.type
= FW_CDEV_EVENT_PHY_PACKET_SENT
;
1545 if (is_ping_packet(a
->data
))
1546 e
->phy_packet
.length
= 4;
1548 card
->driver
->send_request(card
, &e
->p
);
1553 static int ioctl_receive_phy_packets(struct client
*client
, union ioctl_arg
*arg
)
1555 struct fw_cdev_receive_phy_packets
*a
= &arg
->receive_phy_packets
;
1556 struct fw_card
*card
= client
->device
->card
;
1558 /* Access policy: Allow this ioctl only on local nodes' device files. */
1559 if (!client
->device
->is_local
)
1562 spin_lock_irq(&card
->lock
);
1564 list_move_tail(&client
->phy_receiver_link
, &card
->phy_receiver_list
);
1565 client
->phy_receiver_closure
= a
->closure
;
1567 spin_unlock_irq(&card
->lock
);
1572 void fw_cdev_handle_phy_packet(struct fw_card
*card
, struct fw_packet
*p
)
1574 struct client
*client
;
1575 struct inbound_phy_packet_event
*e
;
1576 unsigned long flags
;
1578 spin_lock_irqsave(&card
->lock
, flags
);
1580 list_for_each_entry(client
, &card
->phy_receiver_list
, phy_receiver_link
) {
1581 e
= kmalloc(sizeof(*e
) + 8, GFP_ATOMIC
);
1585 e
->phy_packet
.closure
= client
->phy_receiver_closure
;
1586 e
->phy_packet
.type
= FW_CDEV_EVENT_PHY_PACKET_RECEIVED
;
1587 e
->phy_packet
.rcode
= RCODE_COMPLETE
;
1588 e
->phy_packet
.length
= 8;
1589 e
->phy_packet
.data
[0] = p
->header
[1];
1590 e
->phy_packet
.data
[1] = p
->header
[2];
1591 queue_event(client
, &e
->event
,
1592 &e
->phy_packet
, sizeof(e
->phy_packet
) + 8, NULL
, 0);
1595 spin_unlock_irqrestore(&card
->lock
, flags
);
1598 static int (* const ioctl_handlers
[])(struct client
*, union ioctl_arg
*) = {
1599 [0x00] = ioctl_get_info
,
1600 [0x01] = ioctl_send_request
,
1601 [0x02] = ioctl_allocate
,
1602 [0x03] = ioctl_deallocate
,
1603 [0x04] = ioctl_send_response
,
1604 [0x05] = ioctl_initiate_bus_reset
,
1605 [0x06] = ioctl_add_descriptor
,
1606 [0x07] = ioctl_remove_descriptor
,
1607 [0x08] = ioctl_create_iso_context
,
1608 [0x09] = ioctl_queue_iso
,
1609 [0x0a] = ioctl_start_iso
,
1610 [0x0b] = ioctl_stop_iso
,
1611 [0x0c] = ioctl_get_cycle_timer
,
1612 [0x0d] = ioctl_allocate_iso_resource
,
1613 [0x0e] = ioctl_deallocate_iso_resource
,
1614 [0x0f] = ioctl_allocate_iso_resource_once
,
1615 [0x10] = ioctl_deallocate_iso_resource_once
,
1616 [0x11] = ioctl_get_speed
,
1617 [0x12] = ioctl_send_broadcast_request
,
1618 [0x13] = ioctl_send_stream_packet
,
1619 [0x14] = ioctl_get_cycle_timer2
,
1620 [0x15] = ioctl_send_phy_packet
,
1621 [0x16] = ioctl_receive_phy_packets
,
1622 [0x17] = ioctl_set_iso_channels
,
1623 [0x18] = ioctl_flush_iso
,
1626 static int dispatch_ioctl(struct client
*client
,
1627 unsigned int cmd
, void __user
*arg
)
1629 union ioctl_arg buffer
;
1632 if (fw_device_is_shutdown(client
->device
))
1635 if (_IOC_TYPE(cmd
) != '#' ||
1636 _IOC_NR(cmd
) >= ARRAY_SIZE(ioctl_handlers
) ||
1637 _IOC_SIZE(cmd
) > sizeof(buffer
))
1640 memset(&buffer
, 0, sizeof(buffer
));
1642 if (_IOC_DIR(cmd
) & _IOC_WRITE
)
1643 if (copy_from_user(&buffer
, arg
, _IOC_SIZE(cmd
)))
1646 ret
= ioctl_handlers
[_IOC_NR(cmd
)](client
, &buffer
);
1650 if (_IOC_DIR(cmd
) & _IOC_READ
)
1651 if (copy_to_user(arg
, &buffer
, _IOC_SIZE(cmd
)))
1657 static long fw_device_op_ioctl(struct file
*file
,
1658 unsigned int cmd
, unsigned long arg
)
1660 return dispatch_ioctl(file
->private_data
, cmd
, (void __user
*)arg
);
1663 #ifdef CONFIG_COMPAT
1664 static long fw_device_op_compat_ioctl(struct file
*file
,
1665 unsigned int cmd
, unsigned long arg
)
1667 return dispatch_ioctl(file
->private_data
, cmd
, compat_ptr(arg
));
1671 static int fw_device_op_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1673 struct client
*client
= file
->private_data
;
1675 int page_count
, ret
;
1677 if (fw_device_is_shutdown(client
->device
))
1680 /* FIXME: We could support multiple buffers, but we don't. */
1681 if (client
->buffer
.pages
!= NULL
)
1684 if (!(vma
->vm_flags
& VM_SHARED
))
1687 if (vma
->vm_start
& ~PAGE_MASK
)
1690 client
->vm_start
= vma
->vm_start
;
1691 size
= vma
->vm_end
- vma
->vm_start
;
1692 page_count
= size
>> PAGE_SHIFT
;
1693 if (size
& ~PAGE_MASK
)
1696 ret
= fw_iso_buffer_alloc(&client
->buffer
, page_count
);
1700 spin_lock_irq(&client
->lock
);
1701 if (client
->iso_context
) {
1702 ret
= fw_iso_buffer_map_dma(&client
->buffer
,
1703 client
->device
->card
,
1704 iso_dma_direction(client
->iso_context
));
1705 client
->buffer_is_mapped
= (ret
== 0);
1707 spin_unlock_irq(&client
->lock
);
1711 ret
= fw_iso_buffer_map_vma(&client
->buffer
, vma
);
1717 fw_iso_buffer_destroy(&client
->buffer
, client
->device
->card
);
1721 static int is_outbound_transaction_resource(int id
, void *p
, void *data
)
1723 struct client_resource
*resource
= p
;
1725 return resource
->release
== release_transaction
;
1728 static int has_outbound_transactions(struct client
*client
)
1732 spin_lock_irq(&client
->lock
);
1733 ret
= idr_for_each(&client
->resource_idr
,
1734 is_outbound_transaction_resource
, NULL
);
1735 spin_unlock_irq(&client
->lock
);
1740 static int shutdown_resource(int id
, void *p
, void *data
)
1742 struct client_resource
*resource
= p
;
1743 struct client
*client
= data
;
1745 resource
->release(client
, resource
);
1751 static int fw_device_op_release(struct inode
*inode
, struct file
*file
)
1753 struct client
*client
= file
->private_data
;
1754 struct event
*event
, *next_event
;
1756 spin_lock_irq(&client
->device
->card
->lock
);
1757 list_del(&client
->phy_receiver_link
);
1758 spin_unlock_irq(&client
->device
->card
->lock
);
1760 mutex_lock(&client
->device
->client_list_mutex
);
1761 list_del(&client
->link
);
1762 mutex_unlock(&client
->device
->client_list_mutex
);
1764 if (client
->iso_context
)
1765 fw_iso_context_destroy(client
->iso_context
);
1767 if (client
->buffer
.pages
)
1768 fw_iso_buffer_destroy(&client
->buffer
, client
->device
->card
);
1770 /* Freeze client->resource_idr and client->event_list */
1771 spin_lock_irq(&client
->lock
);
1772 client
->in_shutdown
= true;
1773 spin_unlock_irq(&client
->lock
);
1775 wait_event(client
->tx_flush_wait
, !has_outbound_transactions(client
));
1777 idr_for_each(&client
->resource_idr
, shutdown_resource
, client
);
1778 idr_destroy(&client
->resource_idr
);
1780 list_for_each_entry_safe(event
, next_event
, &client
->event_list
, link
)
1788 static unsigned int fw_device_op_poll(struct file
*file
, poll_table
* pt
)
1790 struct client
*client
= file
->private_data
;
1791 unsigned int mask
= 0;
1793 poll_wait(file
, &client
->wait
, pt
);
1795 if (fw_device_is_shutdown(client
->device
))
1796 mask
|= POLLHUP
| POLLERR
;
1797 if (!list_empty(&client
->event_list
))
1798 mask
|= POLLIN
| POLLRDNORM
;
1803 const struct file_operations fw_device_ops
= {
1804 .owner
= THIS_MODULE
,
1805 .llseek
= no_llseek
,
1806 .open
= fw_device_op_open
,
1807 .read
= fw_device_op_read
,
1808 .unlocked_ioctl
= fw_device_op_ioctl
,
1809 .mmap
= fw_device_op_mmap
,
1810 .release
= fw_device_op_release
,
1811 .poll
= fw_device_op_poll
,
1812 #ifdef CONFIG_COMPAT
1813 .compat_ioctl
= fw_device_op_compat_ioctl
,