diff options
| -rw-r--r-- | drivers/firewire/core-cdev.c | 45 | ||||
| -rw-r--r-- | include/linux/firewire-cdev.h | 76 |
2 files changed, 110 insertions, 11 deletions
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c index 0cf86bcbeea2..9b8df2039155 100644 --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -49,7 +49,8 @@ /* * ABI version history is documented in linux/firewire-cdev.h. */ -#define FW_CDEV_KERNEL_VERSION 3 +#define FW_CDEV_KERNEL_VERSION 4 +#define FW_CDEV_VERSION_EVENT_REQUEST2 4 struct client { u32 version; @@ -176,7 +177,10 @@ struct outbound_transaction_event { struct inbound_transaction_event { struct event event; - struct fw_cdev_event_request request; + union { + struct fw_cdev_event_request request; + struct fw_cdev_event_request2 request2; + } req; }; struct iso_interrupt_event { @@ -645,6 +649,7 @@ static void handle_request(struct fw_card *card, struct fw_request *request, struct address_handler_resource *handler = callback_data; struct inbound_transaction_resource *r; struct inbound_transaction_event *e; + size_t event_size0; void *fcp_frame = NULL; int ret; @@ -678,15 +683,37 @@ static void handle_request(struct fw_card *card, struct fw_request *request, if (ret < 0) goto failed; - e->request.type = FW_CDEV_EVENT_REQUEST; - e->request.tcode = tcode; - e->request.offset = offset; - e->request.length = length; - e->request.handle = r->resource.handle; - e->request.closure = handler->closure; + if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { + struct fw_cdev_event_request *req = &e->req.request; + + if (tcode & 0x10) + tcode = TCODE_LOCK_REQUEST; + + req->type = FW_CDEV_EVENT_REQUEST; + req->tcode = tcode; + req->offset = offset; + req->length = length; + req->handle = r->resource.handle; + req->closure = handler->closure; + event_size0 = sizeof(*req); + } else { + struct fw_cdev_event_request2 *req = &e->req.request2; + + req->type = FW_CDEV_EVENT_REQUEST2; + req->tcode = tcode; + req->offset = offset; + req->source_node_id = source; + req->destination_node_id = destination; + req->card = card->index; + req->generation = generation; + req->length = length; + req->handle = r->resource.handle; + req->closure = handler->closure; + event_size0 = sizeof(*req); + } queue_event(handler->client, &e->event, - &e->request, sizeof(e->request), r->data, length); + &e->req, event_size0, r->data, length); return; failed: diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h index 0d0cc07358af..52c7ffe934ad 100644 --- a/include/linux/firewire-cdev.h +++ b/include/linux/firewire-cdev.h @@ -32,6 +32,9 @@ #define FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED 0x04 #define FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED 0x05 +/* available since kernel version 2.6.36 */ +#define FW_CDEV_EVENT_REQUEST2 0x06 + /** * struct fw_cdev_event_common - Common part of all fw_cdev_event_ types * @closure: For arbitrary use by userspace @@ -98,11 +101,46 @@ struct fw_cdev_event_response { }; /** - * struct fw_cdev_event_request - Sent on incoming request to an address region + * struct fw_cdev_event_request - Old version of &fw_cdev_event_request2 * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST + * @tcode: See &fw_cdev_event_request2 + * @offset: See &fw_cdev_event_request2 + * @handle: See &fw_cdev_event_request2 + * @length: See &fw_cdev_event_request2 + * @data: See &fw_cdev_event_request2 + * + * This event is sent instead of &fw_cdev_event_request2 if the kernel or + * the client implements ABI version <= 3. + * + * Unlike &fw_cdev_event_request2, the sender identity cannot be established, + * broadcast write requests cannot be distinguished from unicast writes, and + * @tcode of lock requests is %TCODE_LOCK_REQUEST. + * + * Requests to the FCP_REQUEST or FCP_RESPONSE register are responded to as + * with &fw_cdev_event_request2, except in kernel 2.6.32 and older which send + * the response packet of the client's %FW_CDEV_IOC_SEND_RESPONSE ioctl. + */ +struct fw_cdev_event_request { + __u64 closure; + __u32 type; + __u32 tcode; + __u64 offset; + __u32 handle; + __u32 length; + __u32 data[0]; +}; + +/** + * struct fw_cdev_event_request2 - Sent on incoming request to an address region + * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_ALLOCATE ioctl + * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_REQUEST2 * @tcode: Transaction code of the incoming request * @offset: The offset into the 48-bit per-node address space + * @source_node_id: Sender node ID + * @destination_node_id: Destination node ID + * @card: The index of the card from which the request came + * @generation: Bus generation in which the request is valid * @handle: Reference to the kernel-side pending request * @length: Data length, i.e. the request's payload size in bytes * @data: Incoming data, if any @@ -115,12 +153,42 @@ struct fw_cdev_event_response { * * The payload data for requests carrying data (write and lock requests) * follows immediately and can be accessed through the @data field. + * + * Unlike &fw_cdev_event_request, @tcode of lock requests is one of the + * firewire-core specific %TCODE_LOCK_MASK_SWAP...%TCODE_LOCK_VENDOR_DEPENDENT, + * i.e. encodes the extended transaction code. + * + * @card may differ from &fw_cdev_get_info.card because requests are received + * from all cards of the Linux host. @source_node_id, @destination_node_id, and + * @generation pertain to that card. Destination node ID and bus generation may + * therefore differ from the corresponding fields of the last + * &fw_cdev_event_bus_reset. + * + * @destination_node_id may also differ from the current node ID because of a + * non-local bus ID part or in case of a broadcast write request. Note, a + * client must call an %FW_CDEV_IOC_SEND_RESPONSE ioctl even in case of a + * broadcast write request; the kernel will then release the kernel-side pending + * request but will not actually send a response packet. + * + * In case of a write request to FCP_REQUEST or FCP_RESPONSE, the kernel already + * sent a write response immediately after the request was received; in this + * case the client must still call an %FW_CDEV_IOC_SEND_RESPONSE ioctl to + * release the kernel-side pending request, though another response won't be + * sent. + * + * If the client subsequently needs to initiate requests to the sender node of + * an &fw_cdev_event_request2, it needs to use a device file with matching + * card index, node ID, and generation for outbound requests. */ -struct fw_cdev_event_request { +struct fw_cdev_event_request2 { __u64 closure; __u32 type; __u32 tcode; __u64 offset; + __u32 source_node_id; + __u32 destination_node_id; + __u32 card; + __u32 generation; __u32 handle; __u32 length; __u32 data[0]; @@ -200,6 +268,7 @@ struct fw_cdev_event_iso_resource { * @bus_reset: Valid if @common.type == %FW_CDEV_EVENT_BUS_RESET * @response: Valid if @common.type == %FW_CDEV_EVENT_RESPONSE * @request: Valid if @common.type == %FW_CDEV_EVENT_REQUEST + * @request2: Valid if @common.type == %FW_CDEV_EVENT_REQUEST2 * @iso_interrupt: Valid if @common.type == %FW_CDEV_EVENT_ISO_INTERRUPT * @iso_resource: Valid if @common.type == * %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or @@ -218,6 +287,7 @@ union fw_cdev_event { struct fw_cdev_event_bus_reset bus_reset; struct fw_cdev_event_response response; struct fw_cdev_event_request request; + struct fw_cdev_event_request2 request2; /* added in 2.6.36 */ struct fw_cdev_event_iso_interrupt iso_interrupt; struct fw_cdev_event_iso_resource iso_resource; /* added in 2.6.30 */ }; @@ -263,8 +333,10 @@ union fw_cdev_event { * (2.6.32) - added time stamp to xmit &fw_cdev_event_iso_interrupt * (2.6.33) - IR has always packet-per-buffer semantics now, not one of * dual-buffer or packet-per-buffer depending on hardware + * - shared use and auto-response for FCP registers * 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable * - added %FW_CDEV_IOC_GET_CYCLE_TIMER2 + * 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2 */ #define FW_CDEV_VERSION 3 /* Meaningless; don't use this macro. */ |
