diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firewire/fw-device-cdev.c | 231 | ||||
| -rw-r--r-- | drivers/firewire/fw-device-cdev.h | 7 |
2 files changed, 119 insertions, 119 deletions
diff --git a/drivers/firewire/fw-device-cdev.c b/drivers/firewire/fw-device-cdev.c index e3c4a52..d02dbc5 100644 --- a/drivers/firewire/fw-device-cdev.c +++ b/drivers/firewire/fw-device-cdev.c @@ -36,16 +36,16 @@ #include "fw-device.h" #include "fw-device-cdev.h" -/* - * todo - * - * - bus resets sends a new packet with new generation and node id - * - */ - /* dequeue_event() just kfree()'s the event, so the event has to be * the first field in the struct. */ +struct client; +struct client_resource { + struct list_head link; + void (*release)(struct client *client, struct client_resource *r); + u32 handle; +}; + struct event { struct { void *data; size_t size; } v[2]; struct list_head link; @@ -60,7 +60,7 @@ struct response { struct event event; struct fw_transaction transaction; struct client *client; - struct list_head link; + struct client_resource resource; struct fw_cdev_event_response response; }; @@ -74,11 +74,7 @@ struct client { struct fw_device *device; spinlock_t lock; u32 resource_handle; - struct list_head handler_list; - struct list_head request_list; - struct list_head transaction_list; - struct list_head descriptor_list; - u32 request_serial; + struct list_head resource_list; struct list_head event_list; wait_queue_head_t wait; u64 bus_reset_closure; @@ -118,10 +114,7 @@ static int fw_device_op_open(struct inode *inode, struct file *file) client->device = fw_device_get(device); INIT_LIST_HEAD(&client->event_list); - INIT_LIST_HEAD(&client->handler_list); - INIT_LIST_HEAD(&client->request_list); - INIT_LIST_HEAD(&client->transaction_list); - INIT_LIST_HEAD(&client->descriptor_list); + INIT_LIST_HEAD(&client->resource_list); spin_lock_init(&client->lock); init_waitqueue_head(&client->wait); @@ -305,6 +298,53 @@ static int ioctl_get_info(struct client *client, void __user *arg) } static void +add_client_resource(struct client *client, struct client_resource *resource) +{ + unsigned long flags; + + spin_lock_irqsave(&client->lock, flags); + list_add_tail(&resource->link, &client->resource_list); + resource->handle = client->resource_handle++; + spin_unlock_irqrestore(&client->lock, flags); +} + +static int +release_client_resource(struct client *client, u32 handle, + struct client_resource **resource) +{ + struct client_resource *r; + unsigned long flags; + + spin_lock_irqsave(&client->lock, flags); + list_for_each_entry(r, &client->resource_list, link) { + if (r->handle == handle) { + list_del(&r->link); + break; + } + } + spin_unlock_irqrestore(&client->lock, flags); + + if (&r->link == &client->resource_list) + return -EINVAL; + + if (resource) + *resource = r; + else + r->release(client, r); + + return 0; +} + +static void +release_transaction(struct client *client, struct client_resource *resource) +{ + struct response *response = + container_of(resource, struct response, resource); + + fw_cancel_transaction(client->device->card, &response->transaction); +} + +static void complete_transaction(struct fw_card *card, int rcode, void *payload, size_t length, void *data) { @@ -319,7 +359,7 @@ complete_transaction(struct fw_card *card, int rcode, response->response.length); spin_lock_irqsave(&client->lock, flags); - list_del(&response->link); + list_del(&response->resource.link); spin_unlock_irqrestore(&client->lock, flags); response->response.type = FW_CDEV_EVENT_RESPONSE; @@ -334,7 +374,6 @@ static ssize_t ioctl_send_request(struct client *client, void __user *arg) struct fw_device *device = client->device; struct fw_cdev_send_request request; struct response *response; - unsigned long flags; if (copy_from_user(&request, arg, sizeof request)) return -EFAULT; @@ -358,9 +397,8 @@ static ssize_t ioctl_send_request(struct client *client, void __user *arg) return -EFAULT; } - spin_lock_irqsave(&client->lock, flags); - list_add_tail(&response->link, &client->transaction_list); - spin_unlock_irqrestore(&client->lock, flags); + response->resource.release = release_transaction; + add_client_resource(client, &response->resource); fw_send_request(device->card, &response->transaction, request.tcode & 0x1f, @@ -381,15 +419,14 @@ struct address_handler { struct fw_address_handler handler; __u64 closure; struct client *client; - struct list_head link; + struct client_resource resource; }; struct request { struct fw_request *request; void *data; size_t length; - u32 serial; - struct list_head link; + struct client_resource resource; }; struct request_event { @@ -398,6 +435,17 @@ struct request_event { }; static void +release_request(struct client *client, struct client_resource *resource) +{ + struct request *request = + container_of(resource, struct request, resource); + + fw_send_response(client->device->card, request->request, + RCODE_CONFLICT_ERROR); + kfree(request); +} + +static void handle_request(struct fw_card *card, struct fw_request *r, int tcode, int destination, int source, int generation, int speed, @@ -407,7 +455,6 @@ handle_request(struct fw_card *card, struct fw_request *r, struct address_handler *handler = callback_data; struct request *request; struct request_event *e; - unsigned long flags; struct client *client = handler->client; request = kmalloc(sizeof *request, GFP_ATOMIC); @@ -423,27 +470,35 @@ handle_request(struct fw_card *card, struct fw_request *r, request->data = payload; request->length = length; - spin_lock_irqsave(&client->lock, flags); - request->serial = client->request_serial++; - list_add_tail(&request->link, &client->request_list); - spin_unlock_irqrestore(&client->lock, flags); + request->resource.release = release_request; + add_client_resource(client, &request->resource); e->request.type = FW_CDEV_EVENT_REQUEST; e->request.tcode = tcode; e->request.offset = offset; e->request.length = length; - e->request.serial = request->serial; + e->request.handle = request->resource.handle; e->request.closure = handler->closure; queue_event(client, &e->event, &e->request, sizeof e->request, payload, length); } +static void +release_address_handler(struct client *client, + struct client_resource *resource) +{ + struct address_handler *handler = + container_of(resource, struct address_handler, resource); + + fw_core_remove_address_handler(&handler->handler); + kfree(handler); +} + static int ioctl_allocate(struct client *client, void __user *arg) { struct fw_cdev_allocate request; struct address_handler *handler; - unsigned long flags; struct fw_address_region region; if (copy_from_user(&request, arg, sizeof request)) @@ -466,9 +521,12 @@ static int ioctl_allocate(struct client *client, void __user *arg) return -EBUSY; } - spin_lock_irqsave(&client->lock, flags); - list_add_tail(&handler->link, &client->handler_list); - spin_unlock_irqrestore(&client->lock, flags); + handler->resource.release = release_address_handler; + add_client_resource(client, &handler->resource); + request.handle = handler->resource.handle; + + if (copy_to_user(arg, &request, sizeof request)) + return -EFAULT; return 0; } @@ -476,57 +534,30 @@ static int ioctl_allocate(struct client *client, void __user *arg) static int ioctl_deallocate(struct client *client, void __user *arg) { struct fw_cdev_deallocate request; - struct address_handler *handler; - unsigned long flags; if (copy_from_user(&request, arg, sizeof request)) return -EFAULT; - spin_lock_irqsave(&client->lock, flags); - list_for_each_entry(handler, &client->handler_list, link) { - if (handler->handler.offset == request.offset) { - list_del(&handler->link); - break; - } - } - spin_unlock_irqrestore(&client->lock, flags); - - if (&handler->link == &client->handler_list) - return -EINVAL; - - fw_core_remove_address_handler(&handler->handler); - - return 0; + return release_client_resource(client, request.handle, NULL); } static int ioctl_send_response(struct client *client, void __user *arg) { struct fw_cdev_send_response request; + struct client_resource *resource; struct request *r; - unsigned long flags; if (copy_from_user(&request, arg, sizeof request)) return -EFAULT; - - spin_lock_irqsave(&client->lock, flags); - list_for_each_entry(r, &client->request_list, link) { - if (r->serial == request.serial) { - list_del(&r->link); - break; - } - } - spin_unlock_irqrestore(&client->lock, flags); - - if (&r->link == &client->request_list) + if (release_client_resource(client, request.handle, &resource) < 0) return -EINVAL; - + r = container_of(resource, struct request, resource); if (request.length < r->length) r->length = request.length; if (copy_from_user(r->data, u64_to_uptr(request.data), r->length)) return -EFAULT; fw_send_response(client->device->card, r->request, request.rcode); - kfree(r); return 0; @@ -547,16 +578,24 @@ static int ioctl_initiate_bus_reset(struct client *client, void __user *arg) struct descriptor { struct fw_descriptor d; - struct list_head link; - u32 handle; + struct client_resource resource; u32 data[0]; }; +static void release_descriptor(struct client *client, + struct client_resource *resource) +{ + struct descriptor *descriptor = + container_of(resource, struct descriptor, resource); + + fw_core_remove_descriptor(&descriptor->d); + kfree(descriptor); +} + static int ioctl_add_descriptor(struct client *client, void __user *arg) { struct fw_cdev_add_descriptor request; struct descriptor *descriptor; - unsigned long flags; int retval; if (copy_from_user(&request, arg, sizeof request)) @@ -587,12 +626,10 @@ static int ioctl_add_descriptor(struct client *client, void __user *arg) return retval; } - spin_lock_irqsave(&client->lock, flags); - list_add_tail(&descriptor->link, &client->descriptor_list); - descriptor->handle = client->resource_handle++; - spin_unlock_irqrestore(&client->lock, flags); + descriptor->resource.release = release_descriptor; + add_client_resource(client, &descriptor->resource); + request.handle = descriptor->resource.handle; - request.handle = descriptor->handle; if (copy_to_user(arg, &request, sizeof request)) return -EFAULT; @@ -602,28 +639,11 @@ static int ioctl_add_descriptor(struct client *client, void __user *arg) static int ioctl_remove_descriptor(struct client *client, void __user *arg) { struct fw_cdev_remove_descriptor request; - struct descriptor *d; - unsigned long flags; if (copy_from_user(&request, arg, sizeof request)) return -EFAULT; - spin_lock_irqsave(&client->lock, flags); - list_for_each_entry(d, &client->descriptor_list, link) { - if (d->handle == request.handle) { - list_del(&d->link); - break; - } - } - spin_unlock_irqrestore(&client->lock, flags); - - if (&d->link == &client->descriptor_list) - return -EINVAL; - - fw_core_remove_descriptor(&d->d); - kfree(d); - - return 0; + return release_client_resource(client, request.handle, NULL); } static void @@ -895,11 +915,8 @@ static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) static int fw_device_op_release(struct inode *inode, struct file *file) { struct client *client = file->private_data; - struct address_handler *h, *next_h; - struct request *r, *next_r; struct event *e, *next_e; - struct response *t, *next_t; - struct descriptor *d, *next_d; + struct client_resource *r, *next_r; unsigned long flags; if (client->buffer.pages) @@ -908,26 +925,8 @@ static int fw_device_op_release(struct inode *inode, struct file *file) if (client->iso_context) fw_iso_context_destroy(client->iso_context); - list_for_each_entry_safe(h, next_h, &client->handler_list, link) { - fw_core_remove_address_handler(&h->handler); - kfree(h); - } - - list_for_each_entry_safe(r, next_r, &client->request_list, link) { - fw_send_response(client->device->card, r->request, - RCODE_CONFLICT_ERROR); - kfree(r); - } - - list_for_each_entry_safe(t, next_t, &client->transaction_list, link) { - fw_cancel_transaction(client->device->card, &t->transaction); - kfree(t); - } - - list_for_each_entry_safe(d, next_d, &client->descriptor_list, link) { - fw_core_remove_descriptor(&d->d); - kfree(d); - } + list_for_each_entry_safe(r, next_r, &client->resource_list, link) + r->release(client, r); /* FIXME: We should wait for the async tasklets to stop * running before freeing the memory. */ diff --git a/drivers/firewire/fw-device-cdev.h b/drivers/firewire/fw-device-cdev.h index 62f5f66..a6340bf 100644 --- a/drivers/firewire/fw-device-cdev.h +++ b/drivers/firewire/fw-device-cdev.h @@ -103,7 +103,7 @@ struct fw_cdev_event_request { __u32 type; __u32 tcode; __u64 offset; - __u32 serial; + __u32 handle; __u32 length; __u32 data[0]; }; @@ -186,17 +186,18 @@ struct fw_cdev_send_response { __u32 rcode; __u32 length; __u64 data; - __u32 serial; + __u32 handle; }; struct fw_cdev_allocate { __u64 offset; __u64 closure; __u32 length; + __u32 handle; }; struct fw_cdev_deallocate { - __u64 offset; + __u32 handle; }; #define FW_CDEV_LONG_RESET 0 |
