usb: renesas_usbhs: modify packet queue control method

Current renesas_usbhs driver is controlling packet queue on mod_gadget.c.
But it has relationship with pipe/fifo, not host/gadget.
So, controlling USB packet queue in pipe.c/fifo.c is
more convenient than in mod_gadget.c.
This patch modify it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/renesas_usbhs/fifo.c

@@ -22,17 +22,40 @@
 /*
  *		packet info function
  */
-void usbhs_pkt_update(struct usbhs_pkt *pkt,
-		      struct usbhs_pipe *pipe,
-		      void *buf, int len)
+void usbhs_pkt_init(struct usbhs_pkt *pkt)
+{
+	INIT_LIST_HEAD(&pkt->node);
+}
+
+void usbhs_pkt_update(struct usbhs_pkt *pkt, void *buf, int len)
 {
-	pkt->pipe	= pipe;
 	pkt->buf	= buf;
 	pkt->length	= len;
 	pkt->actual	= 0;
 	pkt->maxp	= 0;
 }
 
+void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
+{
+	list_del_init(&pkt->node);
+	list_add_tail(&pkt->node, &pipe->list);
+
+	pkt->pipe = pipe;
+}
+
+void usbhs_pkt_pop(struct usbhs_pkt *pkt)
+{
+	list_del_init(&pkt->node);
+}
+
+struct usbhs_pkt *usbhs_pkt_get(struct usbhs_pipe *pipe)
+{
+	if (list_empty(&pipe->list))
+		return NULL;
+
+	return list_entry(pipe->list.next, struct usbhs_pkt, node);
+}
+
 /*
  *		FIFO ctrl
  */

drivers/usb/renesas_usbhs/fifo.h

@@ -20,6 +20,7 @@
 #include "pipe.h"
 
 struct usbhs_pkt {
+	struct list_head node;
 	struct usbhs_pipe *pipe;
 	int maxp;
 	void *buf;
@@ -38,8 +39,10 @@ int usbhs_fifo_prepare_read(struct usbhs_pipe *pipe);
 /*
  * packet info
  */
-void usbhs_pkt_update(struct usbhs_pkt *pkt,
-		      struct usbhs_pipe *pipe,
-		      void *buf, int len);
+void usbhs_pkt_init(struct usbhs_pkt *pkt);
+void usbhs_pkt_update(struct usbhs_pkt *pkt, void *buf, int len);
+void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
+void usbhs_pkt_pop(struct usbhs_pkt *pkt);
+struct usbhs_pkt *usbhs_pkt_get(struct usbhs_pipe *pipe);
 
 #endif /* RENESAS_USB_FIFO_H */

drivers/usb/renesas_usbhs/mod_gadget.c

@@ -26,7 +26,6 @@
  */
 struct usbhsg_request {
 	struct usb_request	req;
-	struct list_head	node;
 	struct usbhs_pkt	pkt;
 };
 
@@ -36,7 +35,6 @@ struct usbhsg_pipe_handle;
 struct usbhsg_uep {
 	struct usb_ep		 ep;
 	struct usbhs_pipe	*pipe;
-	struct list_head	 list;
 
 	char ep_name[EP_NAME_SIZE];
 
@@ -161,12 +159,12 @@ static void usbhsg_queue_push(struct usbhsg_uep *uep,
 	struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 	struct device *dev = usbhsg_gpriv_to_dev(gpriv);
 	struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+	struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 
 	/*
 	 *********  assume under spin lock  *********
 	 */
-	list_del_init(&ureq->node);
-	list_add_tail(&ureq->node, &uep->list);
+	usbhs_pkt_push(pipe, pkt);
 	ureq->req.actual = 0;
 	ureq->req.status = -EINPROGRESS;
 
@@ -177,13 +175,16 @@ static void usbhsg_queue_push(struct usbhsg_uep *uep,
 
 static struct usbhsg_request *usbhsg_queue_get(struct usbhsg_uep *uep)
 {
+	struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+	struct usbhs_pkt *pkt = usbhs_pkt_get(pipe);
+
 	/*
 	 *********  assume under spin lock  *********
 	 */
-	if (list_empty(&uep->list))
-		return NULL;
+	if (!pkt)
+		return 0;
 
-	return list_entry(uep->list.next, struct usbhsg_request, node);
+	return usbhsg_pkt_to_ureq(pkt);
 }
 
 #define usbhsg_queue_prepare(uep) __usbhsg_queue_handler(uep, 1);
@@ -243,6 +244,7 @@ static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 	struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
 	struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 	struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+	struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 
 	/*
 	 *********  assume under spin lock  *********
@@ -268,7 +270,7 @@ static void usbhsg_queue_pop(struct usbhsg_uep *uep,
 
 	dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
 
-	list_del_init(&ureq->node);
+	usbhs_pkt_pop(pkt);
 
 	ureq->req.status = status;
 	ureq->req.complete(&uep->ep, &ureq->req);
@@ -386,7 +388,6 @@ static void usbhsg_try_run_send_packet_bh(struct usbhs_pkt *pkt)
 static int usbhsg_try_run_send_packet(struct usbhsg_uep *uep,
 				      struct usbhsg_request *ureq)
 {
-	struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 	struct usb_request *req = &ureq->req;
 	struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 	int ret;
@@ -395,7 +396,7 @@ static int usbhsg_try_run_send_packet(struct usbhsg_uep *uep,
 	 *********  assume under spin lock  *********
 	 */
 
-	usbhs_pkt_update(pkt, pipe,
+	usbhs_pkt_update(pkt,
 			 req->buf    + req->actual,
 			 req->length - req->actual);
 
@@ -473,7 +474,6 @@ static void usbhsg_try_run_receive_packet_bh(struct usbhs_pkt *pkt)
 static int usbhsg_try_run_receive_packet(struct usbhsg_uep *uep,
 					 struct usbhsg_request *ureq)
 {
-	struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
 	struct usb_request *req = &ureq->req;
 	struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
 
@@ -481,7 +481,7 @@ static int usbhsg_try_run_receive_packet(struct usbhsg_uep *uep,
 	 *********  assume under spin lock  *********
 	 */
 
-	usbhs_pkt_update(pkt, pipe,
+	usbhs_pkt_update(pkt,
 			 req->buf    + req->actual,
 			 req->length - req->actual);
 
@@ -814,7 +814,6 @@ static int usbhsg_dcp_enable(struct usbhsg_uep *uep)
 
 	uep->pipe		= pipe;
 	uep->pipe->mod_private	= uep;
-	INIT_LIST_HEAD(&uep->list);
 
 	return 0;
 }
@@ -888,7 +887,6 @@ static int usbhsg_ep_enable(struct usb_ep *ep,
 	if (pipe) {
 		uep->pipe		= pipe;
 		pipe->mod_private	= uep;
-		INIT_LIST_HEAD(&uep->list);
 
 		if (usb_endpoint_dir_in(desc))
 			uep->handler = &usbhsg_handler_send_packet;
@@ -932,7 +930,8 @@ static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
 	if (!ureq)
 		return NULL;
 
-	INIT_LIST_HEAD(&ureq->node);
+	usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
+
 	return &ureq->req;
 }
 
@@ -941,7 +940,7 @@ static void usbhsg_ep_free_request(struct usb_ep *ep,
 {
 	struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
 
-	WARN_ON(!list_empty(&ureq->node));
+	WARN_ON(!list_empty(&ureq->pkt.node));
 	kfree(ureq);
 }
 
@@ -1379,7 +1378,6 @@ int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
 		uep->ep.name		= uep->ep_name;
 		uep->ep.ops		= &usbhsg_ep_ops;
 		INIT_LIST_HEAD(&uep->ep.ep_list);
-		INIT_LIST_HEAD(&uep->list);
 
 		/* init DCP */
 		if (usbhsg_is_dcp(uep)) {

drivers/usb/renesas_usbhs/pipe.c

@@ -558,6 +558,7 @@ void usbhs_pipe_init(struct usbhs_priv *priv,
 
 		usbhsp_flags_init(pipe);
 		pipe->mod_private = NULL;
+		INIT_LIST_HEAD(&pipe->list);
 
 		/* pipe force init */
 		usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
@@ -585,6 +586,8 @@ struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
 		return NULL;
 	}
 
+	INIT_LIST_HEAD(&pipe->list);
+
 	usbhs_pipe_disable(pipe);
 
 	/* make sure pipe is not busy */
@@ -632,6 +635,7 @@ struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
 
 	usbhsp_pipe_select(pipe);
 	usbhs_pipe_clear_sequence(pipe);
+	INIT_LIST_HEAD(&pipe->list);
 
 	return pipe;
 }

drivers/usb/renesas_usbhs/pipe.h

@@ -27,6 +27,7 @@ struct usbhs_pipe {
 	u32 pipe_type;	/* USB_ENDPOINT_XFER_xxx */
 
 	struct usbhs_priv *priv;
+	struct list_head list;
 
 	u32 flags;
 #define USBHS_PIPE_FLAGS_IS_USED		(1 << 0)