Commit e0aa56dc authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman
Browse files

xhci: dbc: simplify dbc requests allocation and queueing 



Don't pass endpoint pointer, dbctty should not be aware of
struct dbc_ep, knowing the direction is enough.

Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200723144530.9992-23-mathias.nyman@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 11e229a7

drivers/usb/host/xhci-dbgcap.c

+28 −15
Original line number Diff line number Diff line
@@ -135,8 +135,7 @@ static void xhci_dbc_giveback(struct dbc_request *req, int status) 
	__releases(&dbc->lock)

	__acquires(&dbc->lock)

{

	struct dbc_ep		*dep = req->dep;

	struct xhci_dbc		*dbc = dep->dbc;

	struct xhci_dbc		*dbc = req->dbc;

	struct device		*dev = dbc->dev;



	list_del_init(&req->list_pending);
@@ -151,7 +150,7 @@ static void xhci_dbc_giveback(struct dbc_request *req, int status) 
	dma_unmap_single(dev,

			 req->dma,

			 req->length,

			 dbc_ep_dma_direction(dep));

			 dbc_ep_dma_direction(req));



	/* Give back the transfer request: */

	spin_unlock(&dbc->lock);
@@ -187,18 +186,25 @@ static void xhci_dbc_flush_requests(struct xhci_dbc *dbc) 
}



struct dbc_request *

dbc_alloc_request(struct dbc_ep *dep, gfp_t gfp_flags)

dbc_alloc_request(struct xhci_dbc *dbc, unsigned int direction, gfp_t flags)

{

	struct dbc_request	*req;



	req = kzalloc(sizeof(*req), gfp_flags);

	if (direction != BULK_IN &&

	    direction != BULK_OUT)

		return NULL;



	if (!dbc)

		return NULL;



	req = kzalloc(sizeof(*req), flags);

	if (!req)

		return NULL;



	req->dep = dep;

	req->dbc = dbc;

	INIT_LIST_HEAD(&req->list_pending);

	INIT_LIST_HEAD(&req->list_pool);

	req->direction = dep->direction;

	req->direction = direction;



	trace_xhci_dbc_alloc_request(req);
@@ -206,7 +212,7 @@ dbc_alloc_request(struct dbc_ep *dep, gfp_t gfp_flags) 
}



void

dbc_free_request(struct dbc_ep *dep, struct dbc_request *req)

dbc_free_request(struct dbc_request *req)

{

	trace_xhci_dbc_free_request(req);
@@ -242,7 +248,7 @@ static int xhci_dbc_queue_bulk_tx(struct dbc_ep *dep, 
	u64			addr;

	union xhci_trb		*trb;

	unsigned int		num_trbs;

	struct xhci_dbc		*dbc = dep->dbc;

	struct xhci_dbc		*dbc = req->dbc;

	struct xhci_ring	*ring = dep->ring;

	u32			length, control, cycle;
@@ -286,11 +292,12 @@ static int xhci_dbc_queue_bulk_tx(struct dbc_ep *dep, 
}



static int

dbc_ep_do_queue(struct dbc_ep *dep, struct dbc_request *req)

dbc_ep_do_queue(struct dbc_request *req)

{

	int			ret;

	struct xhci_dbc		*dbc = dep->dbc;

	struct xhci_dbc		*dbc = req->dbc;

	struct device		*dev = dbc->dev;

	struct dbc_ep		*dep = &dbc->eps[req->direction];



	if (!req->length || !req->buf)

		return -EINVAL;
@@ -322,16 +329,22 @@ dbc_ep_do_queue(struct dbc_ep *dep, struct dbc_request *req) 
	return 0;

}



int dbc_ep_queue(struct dbc_ep *dep, struct dbc_request *req,

		 gfp_t gfp_flags)

int dbc_ep_queue(struct dbc_request *req)

{

	unsigned long		flags;

	struct xhci_dbc		*dbc = dep->dbc;

	struct xhci_dbc		*dbc = req->dbc;

	int			ret = -ESHUTDOWN;



	if (!dbc)

		return -ENODEV;



	if (req->direction != BULK_IN &&

	    req->direction != BULK_OUT)

		return -EINVAL;



	spin_lock_irqsave(&dbc->lock, flags);

	if (dbc->state == DS_CONFIGURED)

		ret = dbc_ep_do_queue(dep, req);

		ret = dbc_ep_do_queue(req);

	spin_unlock_irqrestore(&dbc->lock, flags);



	mod_delayed_work(system_wq, &dbc->event_work, 0);

drivers/usb/host/xhci-dbgcap.h

+7 −5
Original line number Diff line number Diff line
@@ -88,7 +88,7 @@ struct dbc_ep { 
	struct xhci_dbc			*dbc;

	struct list_head		list_pending;

	struct xhci_ring		*ring;

	unsigned			direction:1;

	unsigned int			direction:1;

};



#define DBC_QUEUE_SIZE			16
@@ -147,7 +147,7 @@ struct dbc_request { 
	int				status;

	unsigned int			actual;



	struct dbc_ep			*dep;

	struct xhci_dbc			*dbc;

	struct list_head		list_pending;

	dma_addr_t			trb_dma;

	union xhci_trb			*trb;
@@ -196,9 +196,11 @@ int xhci_dbc_tty_register_driver(struct xhci_hcd *xhci); 
void xhci_dbc_tty_unregister_driver(void);

int xhci_dbc_tty_register_device(struct xhci_dbc *dbc);

void xhci_dbc_tty_unregister_device(struct xhci_dbc *dbc);

struct dbc_request *dbc_alloc_request(struct dbc_ep *dep, gfp_t gfp_flags);

void dbc_free_request(struct dbc_ep *dep, struct dbc_request *req);

int dbc_ep_queue(struct dbc_ep *dep, struct dbc_request *req, gfp_t gfp_flags);

struct dbc_request *dbc_alloc_request(struct xhci_dbc *dbc,

				      unsigned int direction,

				      gfp_t flags);

void dbc_free_request(struct dbc_request *req);

int dbc_ep_queue(struct dbc_request *req);

#ifdef CONFIG_PM

int xhci_dbc_suspend(struct xhci_hcd *xhci);

int xhci_dbc_resume(struct xhci_hcd *xhci);

drivers/usb/host/xhci-dbgtty.c

+17 −16
Original line number Diff line number Diff line
@@ -48,7 +48,7 @@ static int dbc_start_tx(struct dbc_port *port) 
		list_del(&req->list_pool);



		spin_unlock(&port->port_lock);

		status = dbc_ep_queue(port->out, req, GFP_ATOMIC);

		status = dbc_ep_queue(req);

		spin_lock(&port->port_lock);



		if (status) {
@@ -80,7 +80,7 @@ static void dbc_start_rx(struct dbc_port *port) 
		req->length = DBC_MAX_PACKET;



		spin_unlock(&port->port_lock);

		status = dbc_ep_queue(port->in, req, GFP_ATOMIC);

		status = dbc_ep_queue(req);

		spin_lock(&port->port_lock);



		if (status) {
@@ -123,28 +123,29 @@ static void dbc_write_complete(struct xhci_dbc *dbc, struct dbc_request *req) 
	spin_unlock_irqrestore(&port->port_lock, flags);

}



static void xhci_dbc_free_req(struct dbc_ep *dep, struct dbc_request *req)

static void xhci_dbc_free_req(struct dbc_request *req)

{

	kfree(req->buf);

	dbc_free_request(dep, req);

	dbc_free_request(req);

}



static int

xhci_dbc_alloc_requests(struct dbc_ep *dep, struct list_head *head,

xhci_dbc_alloc_requests(struct xhci_dbc *dbc, unsigned int direction,

			struct list_head *head,

			void (*fn)(struct xhci_dbc *, struct dbc_request *))

{

	int			i;

	struct dbc_request	*req;



	for (i = 0; i < DBC_QUEUE_SIZE; i++) {

		req = dbc_alloc_request(dep, GFP_KERNEL);

		req = dbc_alloc_request(dbc, direction, GFP_KERNEL);

		if (!req)

			break;



		req->length = DBC_MAX_PACKET;

		req->buf = kmalloc(req->length, GFP_KERNEL);

		if (!req->buf) {

			dbc_free_request(dep, req);

			dbc_free_request(req);

			break;

		}
@@ -156,14 +157,14 @@ xhci_dbc_alloc_requests(struct dbc_ep *dep, struct list_head *head, 
}



static void

xhci_dbc_free_requests(struct dbc_ep *dep, struct list_head *head)

xhci_dbc_free_requests(struct list_head *head)

{

	struct dbc_request	*req;



	while (!list_empty(head)) {

		req = list_entry(head->next, struct dbc_request, list_pool);

		list_del(&req->list_pool);

		xhci_dbc_free_req(dep, req);

		xhci_dbc_free_req(req);

	}

}
@@ -456,12 +457,12 @@ int xhci_dbc_tty_register_device(struct xhci_dbc *dbc) 
	if (ret)

		goto buf_alloc_fail;



	ret = xhci_dbc_alloc_requests(port->in, &port->read_pool,

	ret = xhci_dbc_alloc_requests(dbc, BULK_IN, &port->read_pool,

				      dbc_read_complete);

	if (ret)

		goto request_fail;



	ret = xhci_dbc_alloc_requests(port->out, &port->write_pool,

	ret = xhci_dbc_alloc_requests(dbc, BULK_OUT, &port->write_pool,

				      dbc_write_complete);

	if (ret)

		goto request_fail;
@@ -471,8 +472,8 @@ int xhci_dbc_tty_register_device(struct xhci_dbc *dbc) 
	return 0;



request_fail:

	xhci_dbc_free_requests(port->in, &port->read_pool);

	xhci_dbc_free_requests(port->out, &port->write_pool);

	xhci_dbc_free_requests(&port->read_pool);

	xhci_dbc_free_requests(&port->write_pool);

	kfifo_free(&port->write_fifo);



buf_alloc_fail:
@@ -495,7 +496,7 @@ void xhci_dbc_tty_unregister_device(struct xhci_dbc *dbc) 
	port->registered = false;



	kfifo_free(&port->write_fifo);

	xhci_dbc_free_requests(get_out_ep(dbc), &port->read_pool);

	xhci_dbc_free_requests(get_out_ep(dbc), &port->read_queue);

	xhci_dbc_free_requests(get_in_ep(dbc), &port->write_pool);

	xhci_dbc_free_requests(&port->read_pool);

	xhci_dbc_free_requests(&port->read_queue);

	xhci_dbc_free_requests(&port->write_pool);

}

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