firewire: Use struct fw_packet for incoming packets too in controller interface.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

3 files changed, 92 insertions, 81 deletions

diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index d6f0644..8dc872a 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -221,24 +221,48 @@ static void ar_context_tasklet(unsigned long data)
 {
 	struct ar_context *ctx = (struct ar_context *)data;
 	struct fw_ohci *ohci = ctx->ohci;
-	u32 status;
-	int length, speed, ack, timestamp, tcode;
+	struct fw_packet p;
+	u32 status, length, tcode;
 
 	/* FIXME: What to do about evt_* errors? */
 	length    = le16_to_cpu(ctx->descriptor.req_count) -
 		le16_to_cpu(ctx->descriptor.res_count) - 4;
 	status    = le32_to_cpu(ctx->buffer[length / 4]);
-	ack       = ((status >> 16) & 0x1f) - 16;
-	speed     = (status >> 21) & 0x7;
-	timestamp = status & 0xffff;
 
-	ctx->buffer[0] = le32_to_cpu(ctx->buffer[0]);
-	ctx->buffer[1] = le32_to_cpu(ctx->buffer[1]);
-	ctx->buffer[2] = le32_to_cpu(ctx->buffer[2]);
+	p.ack        = ((status >> 16) & 0x1f) - 16;
+	p.speed      = (status >> 21) & 0x7;
+	p.timestamp  = status & 0xffff;
+	p.generation = ohci->request_generation;
+
+	p.header[0] = le32_to_cpu(ctx->buffer[0]);
+	p.header[1] = le32_to_cpu(ctx->buffer[1]);
+	p.header[2] = le32_to_cpu(ctx->buffer[2]);
+
+	tcode = (p.header[0] >> 4) & 0x0f;
+	switch (tcode) {
+	case TCODE_WRITE_QUADLET_REQUEST:
+	case TCODE_READ_QUADLET_RESPONSE:
+		p.header[3] = ctx->buffer[3];
+		p.header_length = 16;
+		break;
+
+	case TCODE_WRITE_BLOCK_REQUEST:
+	case TCODE_READ_BLOCK_REQUEST :
+	case TCODE_READ_BLOCK_RESPONSE:
+	case TCODE_LOCK_REQUEST:
+	case TCODE_LOCK_RESPONSE:
+		p.header[3] = le32_to_cpu(ctx->buffer[3]);
+		p.header_length = 16;
+		break;
+
+	case TCODE_WRITE_RESPONSE:
+	case TCODE_READ_QUADLET_REQUEST:
+		p.header_length = 12;
+		break;
+	}
 
-	tcode = (ctx->buffer[0] >> 4) & 0x0f;
-	if (TCODE_IS_BLOCK_PACKET(tcode))
-		ctx->buffer[3] = le32_to_cpu(ctx->buffer[3]);
+	p.payload = (void *) ctx->buffer + p.header_length;
+	p.payload_length = length - p.header_length;
 
 	/* The OHCI bus reset handler synthesizes a phy packet with
 	 * the new generation number when a bus reset happens (see
@@ -248,15 +272,12 @@ static void ar_context_tasklet(unsigned long data)
 	 * we use the unique tlabel for finding the matching
 	 * request. */
 
-	if (ack + 16 == 0x09)
+	if (p.ack + 16 == 0x09)
 		ohci->request_generation = (ctx->buffer[2] >> 16) & 0xff;
 	else if (ctx == &ohci->ar_request_ctx)
-		fw_core_handle_request(&ohci->card, speed, ack, timestamp,
-				       ohci->request_generation,
-				       length, ctx->buffer);
+		fw_core_handle_request(&ohci->card, &p);
 	else
-		fw_core_handle_response(&ohci->card, speed, ack, timestamp,
-					length, ctx->buffer);
+		fw_core_handle_response(&ohci->card, &p);
 
 	ctx->descriptor.data_address = cpu_to_le32(ctx->buffer_bus);
 	ctx->descriptor.req_count    = cpu_to_le16(sizeof ctx->buffer);
@@ -323,15 +344,15 @@ do_packet_callbacks(struct fw_ohci *ohci, struct list_head *list)
 	struct fw_packet *p, *next;
 
 	list_for_each_entry_safe(p, next, list, link)
-		p->callback(p, &ohci->card, p->status);
+		p->callback(p, &ohci->card, p->ack);
 }
 
 static void
 complete_transmission(struct fw_packet *packet,
-		      int status, struct list_head *list)
+		      int ack, struct list_head *list)
 {
 	list_move_tail(&packet->link, list);
-	packet->status = status;
+	packet->ack = ack;
 }
 
 /* This function prepares the first packet in the context queue for
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 57ecf95..4ca39f0 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -426,15 +426,15 @@ free_response_callback(struct fw_packet *packet,
 
 static void
 fw_fill_response(struct fw_packet *response,
-		 u32 *request, u32 *data, size_t length)
+		 struct fw_packet *request, void *data)
 {
 	int tcode, tlabel, extended_tcode, source, destination;
 
-	tcode          = header_get_tcode(request[0]);
-	tlabel         = header_get_tlabel(request[0]);
-	source         = header_get_destination(request[0]);
-	destination    = header_get_source(request[1]);
-	extended_tcode = header_get_extended_tcode(request[3]);
+	tcode          = header_get_tcode(request->header[0]);
+	tlabel         = header_get_tlabel(request->header[0]);
+	source         = header_get_destination(request->header[0]);
+	destination    = header_get_source(request->header[1]);
+	extended_tcode = header_get_extended_tcode(request->header[3]);
 
 	response->header[0] =
 		header_retry(RETRY_1) |
@@ -463,11 +463,11 @@ fw_fill_response(struct fw_packet *response,
 	case TCODE_LOCK_REQUEST:
 		response->header[0] |= header_tcode(tcode + 2);
 		response->header[3] =
-			header_data_length(length) |
+			header_data_length(request->payload_length) |
 			header_extended_tcode(extended_tcode);
 		response->header_length = 16;
 		response->payload = data;
-		response->payload_length = length;
+		response->payload_length = request->payload_length;
 		break;
 
 	default:
@@ -477,24 +477,23 @@ fw_fill_response(struct fw_packet *response,
 }
 
 static struct fw_request *
-allocate_request(u32 *header, int ack,
-		 int speed, int timestamp, int generation)
+allocate_request(struct fw_packet *p)
 {
 	struct fw_request *request;
 	u32 *data, length;
-	int request_tcode;
+	int request_tcode, t;
 
-	request_tcode = header_get_tcode(header[0]);
+	request_tcode = header_get_tcode(p->header[0]);
 	switch (request_tcode) {
 	case TCODE_WRITE_QUADLET_REQUEST:
-		data = &header[3];
+		data = &p->header[3];
 		length = 4;
 		break;
 
 	case TCODE_WRITE_BLOCK_REQUEST:
 	case TCODE_LOCK_REQUEST:
-		data = &header[4];
-		length = header_get_data_length(header[3]);
+		data = p->payload;
+		length = header_get_data_length(p->header[3]);
 		break;
 
 	case TCODE_READ_QUADLET_REQUEST:
@@ -504,7 +503,7 @@ allocate_request(u32 *header, int ack,
 
 	case TCODE_READ_BLOCK_REQUEST:
 		data = NULL;
-		length = header_get_data_length(header[3]);
+		length = header_get_data_length(p->header[3]);
 		break;
 
 	default:
@@ -516,16 +515,22 @@ allocate_request(u32 *header, int ack,
 	if (request == NULL)
 		return NULL;
 
-	request->response.speed = speed;
-	request->response.timestamp = timestamp;
-	request->response.generation = generation;
+	t = (p->timestamp & 0x1fff) + 4000;
+	if (t >= 8000)
+		t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000;
+	else
+		t = (p->timestamp & ~0x1fff) + t;
+
+	request->response.speed = p->speed;
+	request->response.timestamp = t;
+	request->response.generation = p->generation;
 	request->response.callback = free_response_callback;
-	request->ack = ack;
-	request->length = length;
+	request->ack = p->ack;
+	request->length = p->payload_length;
 	if (data)
-		memcpy(request->data, data, length);
+		memcpy(request->data, p->payload, p->payload_length);
 
-	fw_fill_response(&request->response, header, request->data, length);
+	fw_fill_response(&request->response, p, request->data);
 
 	return request;
 }
@@ -554,31 +559,23 @@ fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
 EXPORT_SYMBOL(fw_send_response);
 
 void
-fw_core_handle_request(struct fw_card *card,
-		       int speed, int ack, int timestamp,
-		       int generation, u32 length, u32 *header)
+fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
 {
 	struct fw_address_handler *handler;
 	struct fw_request *request;
 	unsigned long long offset;
 	unsigned long flags;
-	int tcode, destination, source, t;
+	int tcode, destination, source;
 
-	if (length > 2048) {
+	if (p->payload_length > 2048) {
 		/* FIXME: send error response. */
 		return;
 	}
 
-	if (ack != ACK_PENDING && ack != ACK_COMPLETE)
+	if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
 		return;
 
-	t = (timestamp & 0x1fff) + 4000;
-	if (t >= 8000)
-		t = (timestamp & ~0x1fff) + 0x2000 + t - 8000;
-	else
-		t = (timestamp & ~0x1fff) + t;
-
-	request = allocate_request(header, ack, speed, t, generation);
+	request = allocate_request(p);
 	if (request == NULL) {
 		/* FIXME: send statically allocated busy packet. */
 		return;
@@ -586,10 +583,10 @@ fw_core_handle_request(struct fw_card *card,
 
 	offset      =
 		((unsigned long long)
-		 header_get_offset_high(header[1]) << 32) | header[2];
-	tcode       = header_get_tcode(header[0]);
-	destination = header_get_destination(header[0]);
-	source      = header_get_source(header[0]);
+		 header_get_offset_high(p->header[1]) << 32) | p->header[2];
+	tcode       = header_get_tcode(p->header[0]);
+	destination = header_get_destination(p->header[0]);
+	source      = header_get_source(p->header[0]);
 
 	spin_lock_irqsave(&address_handler_lock, flags);
 	handler = lookup_enclosing_address_handler(&address_handler_list,
@@ -607,16 +604,14 @@ fw_core_handle_request(struct fw_card *card,
 	else
 		handler->address_callback(card, request,
 					  tcode, destination, source,
-					  generation, speed, offset,
+					  p->generation, p->speed, offset,
 					  request->data, request->length,
 					  handler->callback_data);
 }
 EXPORT_SYMBOL(fw_core_handle_request);
 
 void
-fw_core_handle_response(struct fw_card *card,
-			int speed, int ack, int timestamp,
-			u32 length, u32 *header)
+fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
 {
 	struct fw_transaction *t;
 	unsigned long flags;
@@ -624,11 +619,11 @@ fw_core_handle_response(struct fw_card *card,
 	size_t data_length;
 	int tcode, tlabel, destination, source, rcode;
 
-	tcode       = header_get_tcode(header[0]);
-	tlabel      = header_get_tlabel(header[0]);
-	destination = header_get_destination(header[0]);
-	source      = header_get_source(header[1]);
-	rcode       = header_get_rcode(header[1]);
+	tcode       = header_get_tcode(p->header[0]);
+	tlabel      = header_get_tlabel(p->header[0]);
+	destination = header_get_destination(p->header[0]);
+	source      = header_get_source(p->header[1]);
+	rcode       = header_get_rcode(p->header[1]);
 
 	spin_lock_irqsave(&card->lock, flags);
 	list_for_each_entry(t, &card->transaction_list, link) {
@@ -650,7 +645,7 @@ fw_core_handle_response(struct fw_card *card,
 
 	switch (tcode) {
 	case TCODE_READ_QUADLET_RESPONSE:
-		data = (u32 *) &header[3];
+		data = (u32 *) &p->header[3];
 		data_length = 4;
 		break;
 
@@ -661,8 +656,8 @@ fw_core_handle_response(struct fw_card *card,
 
 	case TCODE_READ_BLOCK_RESPONSE:
 	case TCODE_LOCK_RESPONSE:
-		data = &header[4];
-		data_length = header_get_data_length(header[3]);
+		data = &p->header[4];
+		data_length = header_get_data_length(p->header[3]);
 		break;
 
 	default:
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index df65245..903235b 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -180,7 +180,7 @@ struct fw_packet {
 	 * must never block.
 	 */
 	fw_packet_callback_t callback;
-	int status;
+	int ack;
 	struct list_head link;
 };
 
@@ -415,14 +415,9 @@ fw_core_handle_bus_reset(struct fw_card *card,
 			 int node_id, int generation,
 			 int self_id_count, u32 *self_ids);
 void
-fw_core_handle_request(struct fw_card *card,
-		       int speed, int ack, int timestamp,
-		       int generation,
-		       u32 length, u32 *payload);
-void
-fw_core_handle_response(struct fw_card *card,
-			int speed, int ack, int timestamp,
-			u32 length, u32 *payload);
+fw_core_handle_request(struct fw_card *card, struct fw_packet *request);
 
+void
+fw_core_handle_response(struct fw_card *card, struct fw_packet *packet);
 
 #endif /* __fw_transaction_h */