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 5
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;
220 static void __user *u64_to_uptr(u64 value)
222 if (is_compat_task())
223 return compat_ptr(value);
225 return (void __user *)(unsigned long)value;
228 static u64 uptr_to_u64(void __user *ptr)
230 if (is_compat_task())
231 return ptr_to_compat(ptr);
233 return (u64)(unsigned long)ptr;
236 static inline void __user *u64_to_uptr(u64 value)
238 return (void __user *)(unsigned long)value;
241 static inline u64 uptr_to_u64(void __user *ptr)
243 return (u64)(unsigned long)ptr;
245 #endif /* CONFIG_COMPAT */
247 static int fw_device_op_open(struct inode *inode, struct file *file)
249 struct fw_device *device;
250 struct client *client;
252 device = fw_device_get_by_devt(inode->i_rdev);
256 if (fw_device_is_shutdown(device)) {
257 fw_device_put(device);
261 client = kzalloc(sizeof(*client), GFP_KERNEL);
262 if (client == NULL) {
263 fw_device_put(device);
267 client->device = device;
268 spin_lock_init(&client->lock);
269 idr_init(&client->resource_idr);
270 INIT_LIST_HEAD(&client->event_list);
271 init_waitqueue_head(&client->wait);
272 init_waitqueue_head(&client->tx_flush_wait);
273 INIT_LIST_HEAD(&client->phy_receiver_link);
274 INIT_LIST_HEAD(&client->link);
275 kref_init(&client->kref);
277 file->private_data = client;
279 return nonseekable_open(inode, file);
282 static void queue_event(struct client *client, struct event *event,
283 void *data0, size_t size0, void *data1, size_t size1)
287 event->v[0].data = data0;
288 event->v[0].size = size0;
289 event->v[1].data = data1;
290 event->v[1].size = size1;
292 spin_lock_irqsave(&client->lock, flags);
293 if (client->in_shutdown)
296 list_add_tail(&event->link, &client->event_list);
297 spin_unlock_irqrestore(&client->lock, flags);
299 wake_up_interruptible(&client->wait);
302 static int dequeue_event(struct client *client,
303 char __user *buffer, size_t count)
309 ret = wait_event_interruptible(client->wait,
310 !list_empty(&client->event_list) ||
311 fw_device_is_shutdown(client->device));
315 if (list_empty(&client->event_list) &&
316 fw_device_is_shutdown(client->device))
319 spin_lock_irq(&client->lock);
320 event = list_first_entry(&client->event_list, struct event, link);
321 list_del(&event->link);
322 spin_unlock_irq(&client->lock);
325 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
326 size = min(event->v[i].size, count - total);
327 if (copy_to_user(buffer + total, event->v[i].data, size)) {
341 static ssize_t fw_device_op_read(struct file *file, char __user *buffer,
342 size_t count, loff_t *offset)
344 struct client *client = file->private_data;
346 return dequeue_event(client, buffer, count);
349 static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
350 struct client *client)
352 struct fw_card *card = client->device->card;
354 spin_lock_irq(&card->lock);
356 event->closure = client->bus_reset_closure;
357 event->type = FW_CDEV_EVENT_BUS_RESET;
358 event->generation = client->device->generation;
359 event->node_id = client->device->node_id;
360 event->local_node_id = card->local_node->node_id;
361 event->bm_node_id = card->bm_node_id;
362 event->irm_node_id = card->irm_node->node_id;
363 event->root_node_id = card->root_node->node_id;
365 spin_unlock_irq(&card->lock);
368 static void for_each_client(struct fw_device *device,
369 void (*callback)(struct client *client))
373 mutex_lock(&device->client_list_mutex);
374 list_for_each_entry(c, &device->client_list, link)
376 mutex_unlock(&device->client_list_mutex);
379 static int schedule_reallocations(int id, void *p, void *data)
381 schedule_if_iso_resource(p);
386 static void queue_bus_reset_event(struct client *client)
388 struct bus_reset_event *e;
390 e = kzalloc(sizeof(*e), GFP_KERNEL);
392 fw_notice(client->device->card, "out of memory when allocating event\n");
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 ret = copy_to_user(u64_to_uptr(a->bus_reset),
476 &bus_reset, sizeof(bus_reset));
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)
493 if (idr_pre_get(&client->resource_idr, gfp_mask) == 0)
496 spin_lock_irqsave(&client->lock, flags);
497 if (client->in_shutdown)
500 ret = idr_get_new(&client->resource_idr, resource,
504 schedule_if_iso_resource(resource);
506 spin_unlock_irqrestore(&client->lock, flags);
511 return ret < 0 ? ret : 0;
514 static int release_client_resource(struct client *client, u32 handle,
515 client_resource_release_fn_t release,
516 struct client_resource **return_resource)
518 struct client_resource *resource;
520 spin_lock_irq(&client->lock);
521 if (client->in_shutdown)
524 resource = idr_find(&client->resource_idr, handle);
525 if (resource && resource->release == release)
526 idr_remove(&client->resource_idr, handle);
527 spin_unlock_irq(&client->lock);
529 if (!(resource && resource->release == release))
533 *return_resource = resource;
535 resource->release(client, resource);
542 static void release_transaction(struct client *client,
543 struct client_resource *resource)
547 static void complete_transaction(struct fw_card *card, int rcode,
548 void *payload, size_t length, void *data)
550 struct outbound_transaction_event *e = data;
551 struct fw_cdev_event_response *rsp = &e->response;
552 struct client *client = e->client;
555 if (length < rsp->length)
556 rsp->length = length;
557 if (rcode == RCODE_COMPLETE)
558 memcpy(rsp->data, payload, rsp->length);
560 spin_lock_irqsave(&client->lock, flags);
561 idr_remove(&client->resource_idr, e->r.resource.handle);
562 if (client->in_shutdown)
563 wake_up(&client->tx_flush_wait);
564 spin_unlock_irqrestore(&client->lock, flags);
566 rsp->type = FW_CDEV_EVENT_RESPONSE;
570 * In the case that sizeof(*rsp) doesn't align with the position of the
571 * data, and the read is short, preserve an extra copy of the data
572 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
573 * for short reads and some apps depended on it, this is both safe
574 * and prudent for compatibility.
576 if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data))
577 queue_event(client, &e->event, rsp, sizeof(*rsp),
578 rsp->data, rsp->length);
580 queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length,
583 /* Drop the idr's reference */
587 static int init_request(struct client *client,
588 struct fw_cdev_send_request *request,
589 int destination_id, int speed)
591 struct outbound_transaction_event *e;
594 if (request->tcode != TCODE_STREAM_DATA &&
595 (request->length > 4096 || request->length > 512 << speed))
598 if (request->tcode == TCODE_WRITE_QUADLET_REQUEST &&
602 e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
607 e->response.length = request->length;
608 e->response.closure = request->closure;
611 copy_from_user(e->response.data,
612 u64_to_uptr(request->data), request->length)) {
617 e->r.resource.release = release_transaction;
618 ret = add_client_resource(client, &e->r.resource, GFP_KERNEL);
622 fw_send_request(client->device->card, &e->r.transaction,
623 request->tcode, destination_id, request->generation,
624 speed, request->offset, e->response.data,
625 request->length, complete_transaction, e);
634 static int ioctl_send_request(struct client *client, union ioctl_arg *arg)
636 switch (arg->send_request.tcode) {
637 case TCODE_WRITE_QUADLET_REQUEST:
638 case TCODE_WRITE_BLOCK_REQUEST:
639 case TCODE_READ_QUADLET_REQUEST:
640 case TCODE_READ_BLOCK_REQUEST:
641 case TCODE_LOCK_MASK_SWAP:
642 case TCODE_LOCK_COMPARE_SWAP:
643 case TCODE_LOCK_FETCH_ADD:
644 case TCODE_LOCK_LITTLE_ADD:
645 case TCODE_LOCK_BOUNDED_ADD:
646 case TCODE_LOCK_WRAP_ADD:
647 case TCODE_LOCK_VENDOR_DEPENDENT:
653 return init_request(client, &arg->send_request, client->device->node_id,
654 client->device->max_speed);
657 static inline bool is_fcp_request(struct fw_request *request)
659 return request == NULL;
662 static void release_request(struct client *client,
663 struct client_resource *resource)
665 struct inbound_transaction_resource *r = container_of(resource,
666 struct inbound_transaction_resource, resource);
668 if (is_fcp_request(r->request))
671 fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR);
673 fw_card_put(r->card);
677 static void handle_request(struct fw_card *card, struct fw_request *request,
678 int tcode, int destination, int source,
679 int generation, unsigned long long offset,
680 void *payload, size_t length, void *callback_data)
682 struct address_handler_resource *handler = callback_data;
683 struct inbound_transaction_resource *r;
684 struct inbound_transaction_event *e;
686 void *fcp_frame = NULL;
689 /* card may be different from handler->client->device->card */
692 r = kmalloc(sizeof(*r), GFP_ATOMIC);
693 e = kmalloc(sizeof(*e), GFP_ATOMIC);
694 if (r == NULL || e == NULL) {
695 fw_notice(card, "out of memory when allocating event\n");
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);
932 fw_notice(context->card, "out of memory when allocating event\n");
935 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
936 e->interrupt.closure = client->iso_closure;
937 e->interrupt.cycle = cycle;
938 e->interrupt.header_length = header_length;
939 memcpy(e->interrupt.header, header, header_length);
940 queue_event(client, &e->event, &e->interrupt,
941 sizeof(e->interrupt) + header_length, NULL, 0);
944 static void iso_mc_callback(struct fw_iso_context *context,
945 dma_addr_t completed, void *data)
947 struct client *client = data;
948 struct iso_interrupt_mc_event *e;
950 e = kmalloc(sizeof(*e), GFP_ATOMIC);
952 fw_notice(context->card, "out of memory when allocating event\n");
955 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL;
956 e->interrupt.closure = client->iso_closure;
957 e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer,
959 queue_event(client, &e->event, &e->interrupt,
960 sizeof(e->interrupt), NULL, 0);
963 static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg)
965 struct fw_cdev_create_iso_context *a = &arg->create_iso_context;
966 struct fw_iso_context *context;
967 fw_iso_callback_t cb;
969 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT ||
970 FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE ||
971 FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL !=
972 FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL);
975 case FW_ISO_CONTEXT_TRANSMIT:
976 if (a->speed > SCODE_3200 || a->channel > 63)
982 case FW_ISO_CONTEXT_RECEIVE:
983 if (a->header_size < 4 || (a->header_size & 3) ||
990 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
991 cb = (fw_iso_callback_t)iso_mc_callback;
998 context = fw_iso_context_create(client->device->card, a->type,
999 a->channel, a->speed, a->header_size, cb, client);
1000 if (IS_ERR(context))
1001 return PTR_ERR(context);
1003 /* We only support one context at this time. */
1004 spin_lock_irq(&client->lock);
1005 if (client->iso_context != NULL) {
1006 spin_unlock_irq(&client->lock);
1007 fw_iso_context_destroy(context);
1010 client->iso_closure = a->closure;
1011 client->iso_context = context;
1012 spin_unlock_irq(&client->lock);
1019 static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg)
1021 struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels;
1022 struct fw_iso_context *ctx = client->iso_context;
1024 if (ctx == NULL || a->handle != 0)
1027 return fw_iso_context_set_channels(ctx, &a->channels);
1030 /* Macros for decoding the iso packet control header. */
1031 #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
1032 #define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
1033 #define GET_SKIP(v) (((v) >> 17) & 0x01)
1034 #define GET_TAG(v) (((v) >> 18) & 0x03)
1035 #define GET_SY(v) (((v) >> 20) & 0x0f)
1036 #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
1038 static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg)
1040 struct fw_cdev_queue_iso *a = &arg->queue_iso;
1041 struct fw_cdev_iso_packet __user *p, *end, *next;
1042 struct fw_iso_context *ctx = client->iso_context;
1043 unsigned long payload, buffer_end, transmit_header_bytes = 0;
1047 struct fw_iso_packet packet;
1051 if (ctx == NULL || a->handle != 0)
1055 * If the user passes a non-NULL data pointer, has mmap()'ed
1056 * the iso buffer, and the pointer points inside the buffer,
1057 * we setup the payload pointers accordingly. Otherwise we
1058 * set them both to 0, which will still let packets with
1059 * payload_length == 0 through. In other words, if no packets
1060 * use the indirect payload, the iso buffer need not be mapped
1061 * and the a->data pointer is ignored.
1063 payload = (unsigned long)a->data - client->vm_start;
1064 buffer_end = client->buffer.page_count << PAGE_SHIFT;
1065 if (a->data == 0 || client->buffer.pages == NULL ||
1066 payload >= buffer_end) {
1071 if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3)
1074 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets);
1075 if (!access_ok(VERIFY_READ, p, a->size))
1078 end = (void __user *)p + a->size;
1081 if (get_user(control, &p->control))
1083 u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
1084 u.packet.interrupt = GET_INTERRUPT(control);
1085 u.packet.skip = GET_SKIP(control);
1086 u.packet.tag = GET_TAG(control);
1087 u.packet.sy = GET_SY(control);
1088 u.packet.header_length = GET_HEADER_LENGTH(control);
1090 switch (ctx->type) {
1091 case FW_ISO_CONTEXT_TRANSMIT:
1092 if (u.packet.header_length & 3)
1094 transmit_header_bytes = u.packet.header_length;
1097 case FW_ISO_CONTEXT_RECEIVE:
1098 if (u.packet.header_length == 0 ||
1099 u.packet.header_length % ctx->header_size != 0)
1103 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
1104 if (u.packet.payload_length == 0 ||
1105 u.packet.payload_length & 3)
1110 next = (struct fw_cdev_iso_packet __user *)
1111 &p->header[transmit_header_bytes / 4];
1114 if (__copy_from_user
1115 (u.packet.header, p->header, transmit_header_bytes))
1117 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
1118 u.packet.header_length + u.packet.payload_length > 0)
1120 if (payload + u.packet.payload_length > buffer_end)
1123 if (fw_iso_context_queue(ctx, &u.packet,
1124 &client->buffer, payload))
1128 payload += u.packet.payload_length;
1131 fw_iso_context_queue_flush(ctx);
1133 a->size -= uptr_to_u64(p) - a->packets;
1134 a->packets = uptr_to_u64(p);
1135 a->data = client->vm_start + payload;
1140 static int ioctl_start_iso(struct client *client, union ioctl_arg *arg)
1142 struct fw_cdev_start_iso *a = &arg->start_iso;
1145 FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 ||
1146 FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 ||
1147 FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 ||
1148 FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 ||
1149 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS);
1151 if (client->iso_context == NULL || a->handle != 0)
1154 if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE &&
1155 (a->tags == 0 || a->tags > 15 || a->sync > 15))
1158 return fw_iso_context_start(client->iso_context,
1159 a->cycle, a->sync, a->tags);
1162 static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg)
1164 struct fw_cdev_stop_iso *a = &arg->stop_iso;
1166 if (client->iso_context == NULL || a->handle != 0)
1169 return fw_iso_context_stop(client->iso_context);
1172 static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg)
1174 struct fw_cdev_flush_iso *a = &arg->flush_iso;
1176 if (client->iso_context == NULL || a->handle != 0)
1179 return fw_iso_context_flush_completions(client->iso_context);
1182 static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
1184 struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
1185 struct fw_card *card = client->device->card;
1186 struct timespec ts = {0, 0};
1190 local_irq_disable();
1192 cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
1194 switch (a->clk_id) {
1195 case CLOCK_REALTIME: getnstimeofday(&ts); break;
1196 case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break;
1197 case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break;
1204 a->tv_sec = ts.tv_sec;
1205 a->tv_nsec = ts.tv_nsec;
1206 a->cycle_timer = cycle_time;
1211 static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg)
1213 struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer;
1214 struct fw_cdev_get_cycle_timer2 ct2;
1216 ct2.clk_id = CLOCK_REALTIME;
1217 ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2);
1219 a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC;
1220 a->cycle_timer = ct2.cycle_timer;
1225 static void iso_resource_work(struct work_struct *work)
1227 struct iso_resource_event *e;
1228 struct iso_resource *r =
1229 container_of(work, struct iso_resource, work.work);
1230 struct client *client = r->client;
1231 int generation, channel, bandwidth, todo;
1232 bool skip, free, success;
1234 spin_lock_irq(&client->lock);
1235 generation = client->device->generation;
1237 /* Allow 1000ms grace period for other reallocations. */
1238 if (todo == ISO_RES_ALLOC &&
1239 time_before64(get_jiffies_64(),
1240 client->device->card->reset_jiffies + HZ)) {
1241 schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3));
1244 /* We could be called twice within the same generation. */
1245 skip = todo == ISO_RES_REALLOC &&
1246 r->generation == generation;
1248 free = todo == ISO_RES_DEALLOC ||
1249 todo == ISO_RES_ALLOC_ONCE ||
1250 todo == ISO_RES_DEALLOC_ONCE;
1251 r->generation = generation;
1252 spin_unlock_irq(&client->lock);
1257 bandwidth = r->bandwidth;
1259 fw_iso_resource_manage(client->device->card, generation,
1260 r->channels, &channel, &bandwidth,
1261 todo == ISO_RES_ALLOC ||
1262 todo == ISO_RES_REALLOC ||
1263 todo == ISO_RES_ALLOC_ONCE);
1265 * Is this generation outdated already? As long as this resource sticks
1266 * in the idr, it will be scheduled again for a newer generation or at
1269 if (channel == -EAGAIN &&
1270 (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC))
1273 success = channel >= 0 || bandwidth > 0;
1275 spin_lock_irq(&client->lock);
1277 * Transit from allocation to reallocation, except if the client
1278 * requested deallocation in the meantime.
1280 if (r->todo == ISO_RES_ALLOC)
1281 r->todo = ISO_RES_REALLOC;
1283 * Allocation or reallocation failure? Pull this resource out of the
1284 * idr and prepare for deletion, unless the client is shutting down.
1286 if (r->todo == ISO_RES_REALLOC && !success &&
1287 !client->in_shutdown &&
1288 idr_find(&client->resource_idr, r->resource.handle)) {
1289 idr_remove(&client->resource_idr, r->resource.handle);
1293 spin_unlock_irq(&client->lock);
1295 if (todo == ISO_RES_ALLOC && channel >= 0)
1296 r->channels = 1ULL << channel;
1298 if (todo == ISO_RES_REALLOC && success)
1301 if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) {
1306 r->e_dealloc = NULL;
1308 e->iso_resource.handle = r->resource.handle;
1309 e->iso_resource.channel = channel;
1310 e->iso_resource.bandwidth = bandwidth;
1312 queue_event(client, &e->event,
1313 &e->iso_resource, sizeof(e->iso_resource), NULL, 0);
1316 cancel_delayed_work(&r->work);
1318 kfree(r->e_dealloc);
1325 static void release_iso_resource(struct client *client,
1326 struct client_resource *resource)
1328 struct iso_resource *r =
1329 container_of(resource, struct iso_resource, resource);
1331 spin_lock_irq(&client->lock);
1332 r->todo = ISO_RES_DEALLOC;
1333 schedule_iso_resource(r, 0);
1334 spin_unlock_irq(&client->lock);
1337 static int init_iso_resource(struct client *client,
1338 struct fw_cdev_allocate_iso_resource *request, int todo)
1340 struct iso_resource_event *e1, *e2;
1341 struct iso_resource *r;
1344 if ((request->channels == 0 && request->bandwidth == 0) ||
1345 request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL ||
1346 request->bandwidth < 0)
1349 r = kmalloc(sizeof(*r), GFP_KERNEL);
1350 e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
1351 e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
1352 if (r == NULL || e1 == NULL || e2 == NULL) {
1357 INIT_DELAYED_WORK(&r->work, iso_resource_work);
1361 r->channels = request->channels;
1362 r->bandwidth = request->bandwidth;
1366 e1->iso_resource.closure = request->closure;
1367 e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
1368 e2->iso_resource.closure = request->closure;
1369 e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;
1371 if (todo == ISO_RES_ALLOC) {
1372 r->resource.release = release_iso_resource;
1373 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
1377 r->resource.release = NULL;
1378 r->resource.handle = -1;
1379 schedule_iso_resource(r, 0);
1381 request->handle = r->resource.handle;
1392 static int ioctl_allocate_iso_resource(struct client *client,
1393 union ioctl_arg *arg)
1395 return init_iso_resource(client,
1396 &arg->allocate_iso_resource, ISO_RES_ALLOC);
1399 static int ioctl_deallocate_iso_resource(struct client *client,
1400 union ioctl_arg *arg)
1402 return release_client_resource(client,
1403 arg->deallocate.handle, release_iso_resource, NULL);
1406 static int ioctl_allocate_iso_resource_once(struct client *client,
1407 union ioctl_arg *arg)
1409 return init_iso_resource(client,
1410 &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE);
1413 static int ioctl_deallocate_iso_resource_once(struct client *client,
1414 union ioctl_arg *arg)
1416 return init_iso_resource(client,
1417 &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE);
1421 * Returns a speed code: Maximum speed to or from this device,
1422 * limited by the device's link speed, the local node's link speed,
1423 * and all PHY port speeds between the two links.
1425 static int ioctl_get_speed(struct client *client, union ioctl_arg *arg)
1427 return client->device->max_speed;
1430 static int ioctl_send_broadcast_request(struct client *client,
1431 union ioctl_arg *arg)
1433 struct fw_cdev_send_request *a = &arg->send_request;
1436 case TCODE_WRITE_QUADLET_REQUEST:
1437 case TCODE_WRITE_BLOCK_REQUEST:
1443 /* Security policy: Only allow accesses to Units Space. */
1444 if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
1447 return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100);
1450 static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg)
1452 struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet;
1453 struct fw_cdev_send_request request;
1456 if (a->speed > client->device->card->link_speed ||
1457 a->length > 1024 << a->speed)
1460 if (a->tag > 3 || a->channel > 63 || a->sy > 15)
1463 dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy);
1464 request.tcode = TCODE_STREAM_DATA;
1465 request.length = a->length;
1466 request.closure = a->closure;
1467 request.data = a->data;
1468 request.generation = a->generation;
1470 return init_request(client, &request, dest, a->speed);
1473 static void outbound_phy_packet_callback(struct fw_packet *packet,
1474 struct fw_card *card, int status)
1476 struct outbound_phy_packet_event *e =
1477 container_of(packet, struct outbound_phy_packet_event, p);
1481 case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break;
1482 /* should never happen with PHY packets: */
1483 case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break;
1486 case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break;
1487 case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break;
1488 case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break;
1489 /* stale generation; cancelled; on certain controllers: no ack */
1490 default: e->phy_packet.rcode = status; break;
1492 e->phy_packet.data[0] = packet->timestamp;
1494 queue_event(e->client, &e->event, &e->phy_packet,
1495 sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
1496 client_put(e->client);
1499 static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
1501 struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet;
1502 struct fw_card *card = client->device->card;
1503 struct outbound_phy_packet_event *e;
1505 /* Access policy: Allow this ioctl only on local nodes' device files. */
1506 if (!client->device->is_local)
1509 e = kzalloc(sizeof(*e) + 4, GFP_KERNEL);
1515 e->p.speed = SCODE_100;
1516 e->p.generation = a->generation;
1517 e->p.header[0] = TCODE_LINK_INTERNAL << 4;
1518 e->p.header[1] = a->data[0];
1519 e->p.header[2] = a->data[1];
1520 e->p.header_length = 12;
1521 e->p.callback = outbound_phy_packet_callback;
1522 e->phy_packet.closure = a->closure;
1523 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT;
1524 if (is_ping_packet(a->data))
1525 e->phy_packet.length = 4;
1527 card->driver->send_request(card, &e->p);
1532 static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg)
1534 struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets;
1535 struct fw_card *card = client->device->card;
1537 /* Access policy: Allow this ioctl only on local nodes' device files. */
1538 if (!client->device->is_local)
1541 spin_lock_irq(&card->lock);
1543 list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
1544 client->phy_receiver_closure = a->closure;
1546 spin_unlock_irq(&card->lock);
1551 void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
1553 struct client *client;
1554 struct inbound_phy_packet_event *e;
1555 unsigned long flags;
1557 spin_lock_irqsave(&card->lock, flags);
1559 list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
1560 e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
1562 fw_notice(card, "out of memory when allocating event\n");
1565 e->phy_packet.closure = client->phy_receiver_closure;
1566 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED;
1567 e->phy_packet.rcode = RCODE_COMPLETE;
1568 e->phy_packet.length = 8;
1569 e->phy_packet.data[0] = p->header[1];
1570 e->phy_packet.data[1] = p->header[2];
1571 queue_event(client, &e->event,
1572 &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0);
1575 spin_unlock_irqrestore(&card->lock, flags);
1578 static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
1579 [0x00] = ioctl_get_info,
1580 [0x01] = ioctl_send_request,
1581 [0x02] = ioctl_allocate,
1582 [0x03] = ioctl_deallocate,
1583 [0x04] = ioctl_send_response,
1584 [0x05] = ioctl_initiate_bus_reset,
1585 [0x06] = ioctl_add_descriptor,
1586 [0x07] = ioctl_remove_descriptor,
1587 [0x08] = ioctl_create_iso_context,
1588 [0x09] = ioctl_queue_iso,
1589 [0x0a] = ioctl_start_iso,
1590 [0x0b] = ioctl_stop_iso,
1591 [0x0c] = ioctl_get_cycle_timer,
1592 [0x0d] = ioctl_allocate_iso_resource,
1593 [0x0e] = ioctl_deallocate_iso_resource,
1594 [0x0f] = ioctl_allocate_iso_resource_once,
1595 [0x10] = ioctl_deallocate_iso_resource_once,
1596 [0x11] = ioctl_get_speed,
1597 [0x12] = ioctl_send_broadcast_request,
1598 [0x13] = ioctl_send_stream_packet,
1599 [0x14] = ioctl_get_cycle_timer2,
1600 [0x15] = ioctl_send_phy_packet,
1601 [0x16] = ioctl_receive_phy_packets,
1602 [0x17] = ioctl_set_iso_channels,
1603 [0x18] = ioctl_flush_iso,
1606 static int dispatch_ioctl(struct client *client,
1607 unsigned int cmd, void __user *arg)
1609 union ioctl_arg buffer;
1612 if (fw_device_is_shutdown(client->device))
1615 if (_IOC_TYPE(cmd) != '#' ||
1616 _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) ||
1617 _IOC_SIZE(cmd) > sizeof(buffer))
1620 if (_IOC_DIR(cmd) == _IOC_READ)
1621 memset(&buffer, 0, _IOC_SIZE(cmd));
1623 if (_IOC_DIR(cmd) & _IOC_WRITE)
1624 if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd)))
1627 ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer);
1631 if (_IOC_DIR(cmd) & _IOC_READ)
1632 if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd)))
1638 static long fw_device_op_ioctl(struct file *file,
1639 unsigned int cmd, unsigned long arg)
1641 return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
1644 #ifdef CONFIG_COMPAT
1645 static long fw_device_op_compat_ioctl(struct file *file,
1646 unsigned int cmd, unsigned long arg)
1648 return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg));
1652 static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
1654 struct client *client = file->private_data;
1655 enum dma_data_direction direction;
1657 int page_count, ret;
1659 if (fw_device_is_shutdown(client->device))
1662 /* FIXME: We could support multiple buffers, but we don't. */
1663 if (client->buffer.pages != NULL)
1666 if (!(vma->vm_flags & VM_SHARED))
1669 if (vma->vm_start & ~PAGE_MASK)
1672 client->vm_start = vma->vm_start;
1673 size = vma->vm_end - vma->vm_start;
1674 page_count = size >> PAGE_SHIFT;
1675 if (size & ~PAGE_MASK)
1678 if (vma->vm_flags & VM_WRITE)
1679 direction = DMA_TO_DEVICE;
1681 direction = DMA_FROM_DEVICE;
1683 ret = fw_iso_buffer_init(&client->buffer, client->device->card,
1684 page_count, direction);
1688 ret = fw_iso_buffer_map(&client->buffer, vma);
1690 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1695 static int is_outbound_transaction_resource(int id, void *p, void *data)
1697 struct client_resource *resource = p;
1699 return resource->release == release_transaction;
1702 static int has_outbound_transactions(struct client *client)
1706 spin_lock_irq(&client->lock);
1707 ret = idr_for_each(&client->resource_idr,
1708 is_outbound_transaction_resource, NULL);
1709 spin_unlock_irq(&client->lock);
1714 static int shutdown_resource(int id, void *p, void *data)
1716 struct client_resource *resource = p;
1717 struct client *client = data;
1719 resource->release(client, resource);
1725 static int fw_device_op_release(struct inode *inode, struct file *file)
1727 struct client *client = file->private_data;
1728 struct event *event, *next_event;
1730 spin_lock_irq(&client->device->card->lock);
1731 list_del(&client->phy_receiver_link);
1732 spin_unlock_irq(&client->device->card->lock);
1734 mutex_lock(&client->device->client_list_mutex);
1735 list_del(&client->link);
1736 mutex_unlock(&client->device->client_list_mutex);
1738 if (client->iso_context)
1739 fw_iso_context_destroy(client->iso_context);
1741 if (client->buffer.pages)
1742 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1744 /* Freeze client->resource_idr and client->event_list */
1745 spin_lock_irq(&client->lock);
1746 client->in_shutdown = true;
1747 spin_unlock_irq(&client->lock);
1749 wait_event(client->tx_flush_wait, !has_outbound_transactions(client));
1751 idr_for_each(&client->resource_idr, shutdown_resource, client);
1752 idr_remove_all(&client->resource_idr);
1753 idr_destroy(&client->resource_idr);
1755 list_for_each_entry_safe(event, next_event, &client->event_list, link)
1763 static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
1765 struct client *client = file->private_data;
1766 unsigned int mask = 0;
1768 poll_wait(file, &client->wait, pt);
1770 if (fw_device_is_shutdown(client->device))
1771 mask |= POLLHUP | POLLERR;
1772 if (!list_empty(&client->event_list))
1773 mask |= POLLIN | POLLRDNORM;
1778 const struct file_operations fw_device_ops = {
1779 .owner = THIS_MODULE,
1780 .llseek = no_llseek,
1781 .open = fw_device_op_open,
1782 .read = fw_device_op_read,
1783 .unlocked_ioctl = fw_device_op_ioctl,
1784 .mmap = fw_device_op_mmap,
1785 .release = fw_device_op_release,
1786 .poll = fw_device_op_poll,
1787 #ifdef CONFIG_COMPAT
1788 .compat_ioctl = fw_device_op_compat_ioctl,