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Commit 75ee5124 authored by Aaro Koskinen's avatar Aaro Koskinen Committed by Greg Kroah-Hartman
Browse files

staging: octeon-usb: call transfer completion callback directly 



The callback is always the same, we can just call it directly.

Signed-off-by: default avatarAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 393e2146

drivers/staging/octeon-usb/octeon-hcd.c

+111 −243
Original line number Diff line number Diff line
@@ -204,48 +204,6 @@ struct cvmx_usb_iso_packet { 
	enum cvmx_usb_complete status;

};



/**

 * enum cvmx_usb_callback - possible callback reasons for the USB API

 *

 * @CVMX_USB_CALLBACK_TRANSFER_COMPLETE: A callback of this type is called when

 *					 a submitted transfer completes. The

 *					 completion callback will be called even

 *					 if the transfer fails or is canceled.

 *					 The status parameter will contain

 *					 details of why he callback was called.

 * @__CVMX_USB_CALLBACK_END:		 Do not use. Used internally for array

 *					 bounds.

 */

enum cvmx_usb_callback {

	CVMX_USB_CALLBACK_TRANSFER_COMPLETE,

	__CVMX_USB_CALLBACK_END

};



struct cvmx_usb_state;



/**

 * USB callback functions are always of the following type.

 * The parameters are as follows:

 *      - usb = USB device state populated by cvmx_usb_initialize().

 *      - reason = The enum cvmx_usb_callback used to register

 *        the callback.

 *      - status = The enum cvmx_usb_complete representing the

 *        status code of a transaction.

 *      - pipe_handle = The Pipe that caused this callback, or

 *        -1 if this callback wasn't associated with a pipe.

 *      - submit_handle = Transfer submit handle causing this

 *        callback, or -1 if this callback wasn't associated

 *        with a transfer.

 *      - Actual number of bytes transfer.

 *      - user_data = The user pointer supplied to the

 *        function cvmx_usb_submit().

 */

typedef void (*cvmx_usb_callback_func_t)(struct cvmx_usb_state *usb,

                                         enum cvmx_usb_callback reason,

                                         enum cvmx_usb_complete status,

                                         int pipe_handle, int submit_handle,

                                         int bytes_transferred, void *user_data);



/**

 * enum cvmx_usb_initialize_flags - flags used by the initialization function

 *
@@ -376,7 +334,6 @@ enum cvmx_usb_stage { 
 * @iso_packets:	For ISO transactions, the sub packets in the request.

 * @actual_bytes:	Actual bytes transfer for this transaction.

 * @stage:		For control transactions, the current stage.

 * @callback:		User's callback function when complete.

 * @callback_data:	User's data.

 */

struct cvmx_usb_transaction {
@@ -395,7 +352,6 @@ struct cvmx_usb_transaction { 
	int retries;

	int actual_bytes;

	enum cvmx_usb_stage stage;

	cvmx_usb_callback_func_t callback;

	void *callback_data;

};
@@ -2173,50 +2129,109 @@ static void __cvmx_usb_schedule(struct cvmx_usb_state *usb, int is_sof) 
	return;

}



static inline struct octeon_hcd *cvmx_usb_to_octeon(struct cvmx_usb_state *p)

{

	return container_of(p, struct octeon_hcd, usb);

}



/**

 * Call a user's callback for a specific reason.

 *

 * @usb:	 USB device state populated by cvmx_usb_initialize().

 * @pipe:	 Pipe the callback is for or NULL

 * @transaction:

 *		 Transaction the callback is for or NULL

 * @reason:	 Reason this callback is being called

 * @complete_code:

 *		 Completion code for the transaction, if any

 */

static void __cvmx_usb_perform_callback(struct cvmx_usb_state *usb,

					struct cvmx_usb_pipe *pipe,

					struct cvmx_usb_transaction *transaction,

					enum cvmx_usb_callback reason,

					enum cvmx_usb_complete complete_code)

static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p)

{

	cvmx_usb_callback_func_t callback = NULL;

	void *user_data;

	int submit_handle = -1;

	int pipe_handle = -1;

	int bytes_transferred = 0;

	return container_of((void *)p, struct usb_hcd, hcd_priv);

}



	if (pipe)

		pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe);

static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb,

					     enum cvmx_usb_complete status,

					     int pipe_handle,

					     int submit_handle,

					     int bytes_transferred,

					     void *user_data)

{

	struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);

	struct usb_hcd *hcd = octeon_to_hcd(priv);

	struct device *dev = hcd->self.controller;

	struct urb *urb = user_data;



	if (transaction) {

		submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);

		bytes_transferred = transaction->actual_bytes;

		/* Transactions are allowed to override the default callback */

		if ((reason == CVMX_USB_CALLBACK_TRANSFER_COMPLETE) && transaction->callback) {

			callback = transaction->callback;

			user_data = transaction->callback_data;

		}

	}

	urb->actual_length = bytes_transferred;

	urb->hcpriv = NULL;



	if (!callback)

		return;

	if (!list_empty(&urb->urb_list)) {

		/*

		 * It is on the dequeue_list, but we are going to call

		 * usb_hcd_giveback_urb(), so we must clear it from

		 * the list.  We got to it before the

		 * octeon_usb_urb_dequeue_work() tasklet did.

		 */

		list_del(&urb->urb_list);

		/* No longer on the dequeue_list. */

		INIT_LIST_HEAD(&urb->urb_list);

	}



	callback(usb, reason, complete_code, pipe_handle, submit_handle,

		 bytes_transferred, user_data);

	/* For Isochronous transactions we need to update the URB packet status

	   list from data in our private copy */

	if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {

		int i;

		/*

		 * The pointer to the private list is stored in the setup_packet

		 * field.

		 */

		struct cvmx_usb_iso_packet *iso_packet =

			(struct cvmx_usb_iso_packet *) urb->setup_packet;

		/* Recalculate the transfer size by adding up each packet */

		urb->actual_length = 0;

		for (i = 0; i < urb->number_of_packets; i++) {

			if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) {

				urb->iso_frame_desc[i].status = 0;

				urb->iso_frame_desc[i].actual_length = iso_packet[i].length;

				urb->actual_length += urb->iso_frame_desc[i].actual_length;

			} else {

				dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n",

					i, urb->number_of_packets,

					iso_packet[i].status, pipe_handle,

					submit_handle, iso_packet[i].length);

				urb->iso_frame_desc[i].status = -EREMOTEIO;

			}

		}

		/* Free the private list now that we don't need it anymore */

		kfree(iso_packet);

		urb->setup_packet = NULL;

	}



	switch (status) {

	case CVMX_USB_COMPLETE_SUCCESS:

		urb->status = 0;

		break;

	case CVMX_USB_COMPLETE_CANCEL:

		if (urb->status == 0)

			urb->status = -ENOENT;

		break;

	case CVMX_USB_COMPLETE_STALL:

		dev_dbg(dev, "status=stall pipe=%d submit=%d size=%d\n",

			pipe_handle, submit_handle, bytes_transferred);

		urb->status = -EPIPE;

		break;

	case CVMX_USB_COMPLETE_BABBLEERR:

		dev_dbg(dev, "status=babble pipe=%d submit=%d size=%d\n",

			pipe_handle, submit_handle, bytes_transferred);

		urb->status = -EPIPE;

		break;

	case CVMX_USB_COMPLETE_SHORT:

		dev_dbg(dev, "status=short pipe=%d submit=%d size=%d\n",

			pipe_handle, submit_handle, bytes_transferred);

		urb->status = -EREMOTEIO;

		break;

	case CVMX_USB_COMPLETE_ERROR:

	case CVMX_USB_COMPLETE_XACTERR:

	case CVMX_USB_COMPLETE_DATATGLERR:

	case CVMX_USB_COMPLETE_FRAMEERR:

		dev_dbg(dev, "status=%d pipe=%d submit=%d size=%d\n",

			status, pipe_handle, submit_handle, bytes_transferred);

		urb->status = -EPROTO;

		break;

	}

	spin_unlock(&priv->lock);

	usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status);

	spin_lock(&priv->lock);

}



/**

 * Signal the completion of a transaction and free it. The
@@ -2234,6 +2249,9 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb, 
					struct cvmx_usb_transaction *transaction,

					enum cvmx_usb_complete complete_code)

{

	int pipe_handle;

	int submit_handle;



	/* If this was a split then clear our split in progress marker */

	if (usb->active_split == transaction)

		usb->active_split = NULL;
@@ -2277,9 +2295,12 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb, 
		__cvmx_usb_append_pipe(&usb->idle_pipes, pipe);



	}

	__cvmx_usb_perform_callback(usb, pipe, transaction,

				    CVMX_USB_CALLBACK_TRANSFER_COMPLETE,

				    complete_code);

	pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe);

	submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);

	octeon_usb_urb_complete_callback(usb, complete_code, pipe_handle,

					 submit_handle,

					 transaction->actual_bytes,

					 transaction->callback_data);

	__cvmx_usb_free_transaction(usb, transaction);

done:

	return;
@@ -2305,7 +2326,6 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb, 
 *		    For ISO, the number of packet in the transaction.

 * @iso_packets:

 *		    A description of each ISO packet

 * @callback:	    User callback to call when the transaction completes

 * @user_data:	    User's data for the callback

 *

 * Returns: Submit handle or negative on failure. Matches the result
@@ -2320,7 +2340,6 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb, 
					 int iso_start_frame,

					 int iso_number_packets,

					 struct cvmx_usb_iso_packet *iso_packets,

					 cvmx_usb_callback_func_t callback,

					 void *user_data)

{

	int submit_handle;
@@ -2347,7 +2366,6 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb, 
	transaction->iso_start_frame = iso_start_frame;

	transaction->iso_number_packets = iso_number_packets;

	transaction->iso_packets = iso_packets;

	transaction->callback = callback;

	transaction->callback_data = user_data;

	if (transaction->type == CVMX_USB_TRANSFER_CONTROL)

		transaction->stage = CVMX_USB_STAGE_SETUP;
@@ -2392,23 +2410,14 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb, 
 *		    zero.

 * @buffer_length:

 *		    Length of buffer in bytes.

 * @callback:	    Function to call when this transaction

 *		    completes. If the return value of this

 *		    function isn't an error, then this function

 *		    is guaranteed to be called when the

 *		    transaction completes. If this parameter is

 *		    NULL, then there is no way to know when a transaction

 *		    completes.

 * @user_data:	    User supplied data returned when the

 *		    callback is called. This is only used if

 *		    callback in not NULL.

 *		    callback is called.

 *

 * Returns: A submitted transaction handle or negative on

 *	    failure. Negative values are error codes.

 */

static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, int pipe_handle,

				uint64_t buffer, int buffer_length,

				cvmx_usb_callback_func_t callback,

				void *user_data)

{

	int submit_handle;
@@ -2427,7 +2436,6 @@ static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, int pipe_handle, 
						      0, /* iso_start_frame */

						      0, /* iso_number_packets */

						      NULL, /* iso_packets */

						      callback,

						      user_data);

	return submit_handle;

}
@@ -2446,25 +2454,15 @@ static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, int pipe_handle, 
 *		    zero.

 * @buffer_length:

 *		    Length of buffer in bytes.

 * @callback:	    Function to call when this transaction

 *		    completes. If the return value of this

 *		    function isn't an error, then this function

 *		    is guaranteed to be called when the

 *		    transaction completes. If this parameter is

 *		    NULL, then there is no way to know when a transaction

 *		    completes.

 * @user_data:	    User supplied data returned when the

 *		    callback is called. This is only used if

 *		    callback in not NULL.

 *		    callback is called.

 *

 * Returns: A submitted transaction handle or negative on

 *	    failure. Negative values are error codes.

 */

static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,

				     int pipe_handle, uint64_t buffer,

				     int buffer_length,

				     cvmx_usb_callback_func_t callback,

				     void *user_data)

				     int buffer_length, void *user_data)

{

	int submit_handle;
@@ -2482,7 +2480,6 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb, 
						      0, /* iso_start_frame */

						      0, /* iso_number_packets */

						      NULL, /* iso_packets */

						      callback,

						      user_data);

	return submit_handle;

}
@@ -2505,16 +2502,8 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb, 
 *		    zero.

 * @buffer_length:

 *		    Length of buffer in bytes.

 * @callback:	    Function to call when this transaction

 *		    completes. If the return value of this

 *		    function isn't an error, then this function

 *		    is guaranteed to be called when the

 *		    transaction completes. If this parameter is

 *		    NULL, then there is no way to know when a transaction

 *		    completes.

 * @user_data:	    User supplied data returned when the

 *		    callback is called. This is only used if

 *		    callback in not NULL.

 *		    callback is called.

 *

 * Returns: A submitted transaction handle or negative on

 *	    failure. Negative values are error codes.
@@ -2522,7 +2511,6 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb, 
static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,

				   int pipe_handle, uint64_t control_header,

				   uint64_t buffer, int buffer_length,

				   cvmx_usb_callback_func_t callback,

				   void *user_data)

{

	int submit_handle;
@@ -2548,7 +2536,6 @@ static int cvmx_usb_submit_control(struct cvmx_usb_state *usb, 
						      0, /* iso_start_frame */

						      0, /* iso_number_packets */

						      NULL, /* iso_packets */

						      callback,

						      user_data);

	return submit_handle;

}
@@ -2578,16 +2565,8 @@ static int cvmx_usb_submit_control(struct cvmx_usb_state *usb, 
 *		    zero.

 * @buffer_length:

 *		    Length of buffer in bytes.

 * @callback:	    Function to call when this transaction

 *		    completes. If the return value of this

 *		    function isn't an error, then this function

 *		    is guaranteed to be called when the

 *		    transaction completes. If this parameter is

 *		    NULL, then there is no way to know when a transaction

 *		    completes.

 * @user_data:	    User supplied data returned when the

 *		    callback is called. This is only used if

 *		    callback in not NULL.

 *		    callback is called.

 *

 * Returns: A submitted transaction handle or negative on

 *	    failure. Negative values are error codes.
@@ -2597,7 +2576,6 @@ static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb, 
				       int number_packets, struct

				       cvmx_usb_iso_packet packets[],

				       uint64_t buffer, int buffer_length,

				       cvmx_usb_callback_func_t callback,

				       void *user_data)

{

	int submit_handle;
@@ -2622,7 +2600,6 @@ static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb, 
						      start_frame,

						      number_packets,

						      packets,

						      callback,

						      user_data);

	return submit_handle;

}
@@ -3217,16 +3194,6 @@ static int __cvmx_usb_poll_channel(struct cvmx_usb_state *usb, int channel) 
	return 0;

}



static inline struct octeon_hcd *cvmx_usb_to_octeon(struct cvmx_usb_state *p)

{

	return container_of(p, struct octeon_hcd, usb);

}



static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p)

{

	return container_of((void *)p, struct usb_hcd, hcd_priv);

}



static void octeon_usb_port_callback(struct cvmx_usb_state *usb)

{

	struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
@@ -3372,101 +3339,6 @@ static int octeon_usb_get_frame_number(struct usb_hcd *hcd) 
	return cvmx_usb_get_frame_number(&priv->usb);

}



static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb,

					     enum cvmx_usb_callback reason,

					     enum cvmx_usb_complete status,

					     int pipe_handle,

					     int submit_handle,

					     int bytes_transferred,

					     void *user_data)

{

	struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);

	struct usb_hcd *hcd = octeon_to_hcd(priv);

	struct device *dev = hcd->self.controller;

	struct urb *urb = user_data;



	urb->actual_length = bytes_transferred;

	urb->hcpriv = NULL;



	if (!list_empty(&urb->urb_list)) {

		/*

		 * It is on the dequeue_list, but we are going to call

		 * usb_hcd_giveback_urb(), so we must clear it from

		 * the list.  We got to it before the

		 * octeon_usb_urb_dequeue_work() tasklet did.

		 */

		list_del(&urb->urb_list);

		/* No longer on the dequeue_list. */

		INIT_LIST_HEAD(&urb->urb_list);

	}



	/* For Isochronous transactions we need to update the URB packet status

	   list from data in our private copy */

	if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {

		int i;

		/*

		 * The pointer to the private list is stored in the setup_packet

		 * field.

		 */

		struct cvmx_usb_iso_packet *iso_packet =

			(struct cvmx_usb_iso_packet *) urb->setup_packet;

		/* Recalculate the transfer size by adding up each packet */

		urb->actual_length = 0;

		for (i = 0; i < urb->number_of_packets; i++) {

			if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) {

				urb->iso_frame_desc[i].status = 0;

				urb->iso_frame_desc[i].actual_length = iso_packet[i].length;

				urb->actual_length += urb->iso_frame_desc[i].actual_length;

			} else {

				dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n",

					i, urb->number_of_packets,

					iso_packet[i].status, pipe_handle,

					submit_handle, iso_packet[i].length);

				urb->iso_frame_desc[i].status = -EREMOTEIO;

			}

		}

		/* Free the private list now that we don't need it anymore */

		kfree(iso_packet);

		urb->setup_packet = NULL;

	}



	switch (status) {

	case CVMX_USB_COMPLETE_SUCCESS:

		urb->status = 0;

		break;

	case CVMX_USB_COMPLETE_CANCEL:

		if (urb->status == 0)

			urb->status = -ENOENT;

		break;

	case CVMX_USB_COMPLETE_STALL:

		dev_dbg(dev, "status=stall pipe=%d submit=%d size=%d\n",

			pipe_handle, submit_handle, bytes_transferred);

		urb->status = -EPIPE;

		break;

	case CVMX_USB_COMPLETE_BABBLEERR:

		dev_dbg(dev, "status=babble pipe=%d submit=%d size=%d\n",

			pipe_handle, submit_handle, bytes_transferred);

		urb->status = -EPIPE;

		break;

	case CVMX_USB_COMPLETE_SHORT:

		dev_dbg(dev, "status=short pipe=%d submit=%d size=%d\n",

			pipe_handle, submit_handle, bytes_transferred);

		urb->status = -EREMOTEIO;

		break;

	case CVMX_USB_COMPLETE_ERROR:

	case CVMX_USB_COMPLETE_XACTERR:

	case CVMX_USB_COMPLETE_DATATGLERR:

	case CVMX_USB_COMPLETE_FRAMEERR:

		dev_dbg(dev, "status=%d pipe=%d submit=%d size=%d\n",

			status, pipe_handle, submit_handle, bytes_transferred);

		urb->status = -EPROTO;

		break;

	}

	spin_unlock(&priv->lock);

	usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status);

	spin_lock(&priv->lock);

}



static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,

				  struct urb *urb,

				  gfp_t mem_flags)
@@ -3595,7 +3467,6 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, 
							iso_packet,

							urb->transfer_dma,

							urb->transfer_buffer_length,

							octeon_usb_urb_complete_callback,

							urb);

			/*

			 * If submit failed we need to free our private packet
@@ -3613,7 +3484,6 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, 
		submit_handle = cvmx_usb_submit_interrupt(&priv->usb, pipe_handle,

					      urb->transfer_dma,

					      urb->transfer_buffer_length,

					      octeon_usb_urb_complete_callback,

					      urb);

		break;

	case PIPE_CONTROL:
@@ -3623,7 +3493,6 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, 
					    urb->setup_dma,

					    urb->transfer_dma,

					    urb->transfer_buffer_length,

					    octeon_usb_urb_complete_callback,

					    urb);

		break;

	case PIPE_BULK:
@@ -3632,7 +3501,6 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, 
		submit_handle = cvmx_usb_submit_bulk(&priv->usb, pipe_handle,

					 urb->transfer_dma,

					 urb->transfer_buffer_length,

					 octeon_usb_urb_complete_callback,

					 urb);

		break;

	}