From 66dea3e5f69abfdfa46b091ea117e497758351e7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Kristian=20H=C3=B8gsberg?= Date: Wed, 28 Mar 2007 21:26:42 +0200 Subject: firewire: Add ioctls to add and remove config rom descriptors. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Kristian Høgsberg Signed-off-by: Stefan Richter (fixed whitespace) --- drivers/firewire/fw-card.c | 2 +- drivers/firewire/fw-device-cdev.c | 94 +++++++++++++++++++++++++++++++++++++++ drivers/firewire/fw-device-cdev.h | 23 ++++++++-- 3 files changed, 114 insertions(+), 5 deletions(-) (limited to 'drivers/firewire') diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c index 34863b60e23..3eb06556a0c 100644 --- a/drivers/firewire/fw-card.c +++ b/drivers/firewire/fw-card.c @@ -160,7 +160,7 @@ fw_core_add_descriptor (struct fw_descriptor *desc) i += (desc->data[i] >> 16) + 1; if (i != desc->length) - return -1; + return -EINVAL; down_write(&fw_bus_type.subsys.rwsem); diff --git a/drivers/firewire/fw-device-cdev.c b/drivers/firewire/fw-device-cdev.c index 12471444f1b..e3c4a52a44a 100644 --- a/drivers/firewire/fw-device-cdev.c +++ b/drivers/firewire/fw-device-cdev.c @@ -73,9 +73,11 @@ struct client { u32 version; 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 event_list; wait_queue_head_t wait; @@ -119,6 +121,7 @@ static int fw_device_op_open(struct inode *inode, struct file *file) INIT_LIST_HEAD(&client->handler_list); INIT_LIST_HEAD(&client->request_list); INIT_LIST_HEAD(&client->transaction_list); + INIT_LIST_HEAD(&client->descriptor_list); spin_lock_init(&client->lock); init_waitqueue_head(&client->wait); @@ -542,6 +545,87 @@ static int ioctl_initiate_bus_reset(struct client *client, void __user *arg) return fw_core_initiate_bus_reset(client->device->card, short_reset); } +struct descriptor { + struct fw_descriptor d; + struct list_head link; + u32 handle; + u32 data[0]; +}; + +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)) + return -EFAULT; + + if (request.length > 256) + return -EINVAL; + + descriptor = + kmalloc(sizeof *descriptor + request.length * 4, GFP_KERNEL); + if (descriptor == NULL) + return -ENOMEM; + + if (copy_from_user(descriptor->data, + u64_to_uptr(request.data), request.length * 4)) { + kfree(descriptor); + return -EFAULT; + } + + descriptor->d.length = request.length; + descriptor->d.immediate = request.immediate; + descriptor->d.key = request.key; + descriptor->d.data = descriptor->data; + + retval = fw_core_add_descriptor(&descriptor->d); + if (retval < 0) { + kfree(descriptor); + 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); + + request.handle = descriptor->handle; + if (copy_to_user(arg, &request, sizeof request)) + return -EFAULT; + + return 0; +} + +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; +} + static void iso_callback(struct fw_iso_context *context, u32 cycle, size_t header_length, void *header, void *data) @@ -731,6 +815,10 @@ dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) return ioctl_send_response(client, arg); case FW_CDEV_IOC_INITIATE_BUS_RESET: return ioctl_initiate_bus_reset(client, arg); + case FW_CDEV_IOC_ADD_DESCRIPTOR: + return ioctl_add_descriptor(client, arg); + case FW_CDEV_IOC_REMOVE_DESCRIPTOR: + return ioctl_remove_descriptor(client, arg); case FW_CDEV_IOC_CREATE_ISO_CONTEXT: return ioctl_create_iso_context(client, arg); case FW_CDEV_IOC_QUEUE_ISO: @@ -811,6 +899,7 @@ static int fw_device_op_release(struct inode *inode, struct file *file) struct request *r, *next_r; struct event *e, *next_e; struct response *t, *next_t; + struct descriptor *d, *next_d; unsigned long flags; if (client->buffer.pages) @@ -835,6 +924,11 @@ static int fw_device_op_release(struct inode *inode, struct file *file) kfree(t); } + list_for_each_entry_safe(d, next_d, &client->descriptor_list, link) { + fw_core_remove_descriptor(&d->d); + kfree(d); + } + /* 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 72befda989b..62f5f66ca10 100644 --- a/drivers/firewire/fw-device-cdev.h +++ b/drivers/firewire/fw-device-cdev.h @@ -130,10 +130,13 @@ union fw_cdev_event { #define FW_CDEV_IOC_DEALLOCATE _IO('#', 0x03) #define FW_CDEV_IOC_SEND_RESPONSE _IO('#', 0x04) #define FW_CDEV_IOC_INITIATE_BUS_RESET _IO('#', 0x05) -#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IO('#', 0x06) -#define FW_CDEV_IOC_QUEUE_ISO _IO('#', 0x07) -#define FW_CDEV_IOC_START_ISO _IO('#', 0x08) -#define FW_CDEV_IOC_STOP_ISO _IO('#', 0x09) +#define FW_CDEV_IOC_ADD_DESCRIPTOR _IO('#', 0x06) +#define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IO('#', 0x07) + +#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IO('#', 0x08) +#define FW_CDEV_IOC_QUEUE_ISO _IO('#', 0x09) +#define FW_CDEV_IOC_START_ISO _IO('#', 0x0a) +#define FW_CDEV_IOC_STOP_ISO _IO('#', 0x0b) /* FW_CDEV_VERSION History * @@ -203,6 +206,18 @@ struct fw_cdev_initiate_bus_reset { __u32 type; }; +struct fw_cdev_add_descriptor { + __u32 immediate; + __u32 key; + __u64 data; + __u32 length; + __u32 handle; +}; + +struct fw_cdev_remove_descriptor { + __u32 handle; +}; + #define FW_CDEV_ISO_CONTEXT_TRANSMIT 0 #define FW_CDEV_ISO_CONTEXT_RECEIVE 1 -- cgit v1.2.3