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authorAaro Koskinen <aaro.koskinen@iki.fi>2013-10-06 19:22:35 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-07 05:02:21 (GMT)
commit60f815078f8e2040546c3a4c5c9eb62b07f417cb (patch)
tree7dd6fa4ab5e04010482788d6d97351c7c5510ae8 /drivers/staging/octeon-usb
parentbe44063df5b1eb1d10066c9d88c514d49411748b (diff)
staging: octeon-usb: eliminate pipe_handle
Eliminate pipe_handle, use a direct reference instead. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/octeon-usb')
-rw-r--r--drivers/staging/octeon-usb/octeon-hcd.c221
1 files changed, 92 insertions, 129 deletions
diff --git a/drivers/staging/octeon-usb/octeon-hcd.c b/drivers/staging/octeon-usb/octeon-hcd.c
index afaf991..b07425c 100644
--- a/drivers/staging/octeon-usb/octeon-hcd.c
+++ b/drivers/staging/octeon-usb/octeon-hcd.c
@@ -1267,22 +1267,6 @@ static inline int __cvmx_usb_get_submit_handle(struct cvmx_usb_state *usb,
sizeof(*transaction);
}
-
-/**
- * Convert a USB pipe into a handle
- *
- * @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe: Pipe to get handle for
- *
- * Returns: Handle
- */
-static inline int __cvmx_usb_get_pipe_handle(struct cvmx_usb_state *usb,
- struct cvmx_usb_pipe *pipe)
-{
- return ((unsigned long)pipe - (unsigned long)usb->pipe) / sizeof(*pipe);
-}
-
-
/**
* Open a virtual pipe between the host and a USB device. A pipe
* must be opened before data can be transferred between a device
@@ -1333,50 +1317,55 @@ static inline int __cvmx_usb_get_pipe_handle(struct cvmx_usb_state *usb,
* this is only used for full/low speed
* devices behind a high speed hub.
*
- * Returns: A non negative value is a pipe handle. Negative
- * values are error codes.
+ * Returns: A non-NULL value is a pipe. NULL means an error.
*/
-static int cvmx_usb_open_pipe(struct cvmx_usb_state *usb,
- int device_addr, int endpoint_num,
- enum cvmx_usb_speed device_speed, int max_packet,
- enum cvmx_usb_transfer transfer_type,
- enum cvmx_usb_direction transfer_dir,
- int interval, int multi_count,
- int hub_device_addr, int hub_port)
+static struct cvmx_usb_pipe *cvmx_usb_open_pipe(struct cvmx_usb_state *usb,
+ int device_addr, int
+ endpoint_num,
+ enum cvmx_usb_speed
+ device_speed,
+ int max_packet,
+ enum cvmx_usb_transfer
+ transfer_type,
+ enum cvmx_usb_direction
+ transfer_dir,
+ int interval, int multi_count,
+ int hub_device_addr,
+ int hub_port)
{
struct cvmx_usb_pipe *pipe;
if (unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS)))
- return -EINVAL;
+ return NULL;
if (unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT)))
- return -EINVAL;
+ return NULL;
if (unlikely(device_speed > CVMX_USB_SPEED_LOW))
- return -EINVAL;
+ return NULL;
if (unlikely((max_packet <= 0) || (max_packet > 1024)))
- return -EINVAL;
+ return NULL;
if (unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT))
- return -EINVAL;
+ return NULL;
if (unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) &&
(transfer_dir != CVMX_USB_DIRECTION_IN)))
- return -EINVAL;
+ return NULL;
if (unlikely(interval < 0))
- return -EINVAL;
+ return NULL;
if (unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval))
- return -EINVAL;
+ return NULL;
if (unlikely(multi_count < 0))
- return -EINVAL;
+ return NULL;
if (unlikely((device_speed != CVMX_USB_SPEED_HIGH) &&
(multi_count != 0)))
- return -EINVAL;
+ return NULL;
if (unlikely((hub_device_addr < 0) || (hub_device_addr > MAX_USB_ADDRESS)))
- return -EINVAL;
+ return NULL;
if (unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT)))
- return -EINVAL;
+ return NULL;
/* Find a free pipe */
pipe = usb->free_pipes.head;
if (!pipe)
- return -ENOMEM;
+ return NULL;
__cvmx_usb_remove_pipe(&usb->free_pipes, pipe);
pipe->flags = __CVMX_USB_PIPE_FLAGS_OPEN;
if ((device_speed == CVMX_USB_SPEED_HIGH) &&
@@ -1415,7 +1404,7 @@ static int cvmx_usb_open_pipe(struct cvmx_usb_state *usb,
* it doesn't have any submitted requests
*/
- return __cvmx_usb_get_pipe_handle(usb, pipe);
+ return pipe;
}
@@ -2141,7 +2130,7 @@ static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p)
static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb,
enum cvmx_usb_complete status,
- int pipe_handle,
+ struct cvmx_usb_pipe *pipe,
int submit_handle,
int bytes_transferred,
struct urb *urb)
@@ -2183,9 +2172,9 @@ static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb,
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",
+ dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%p submit=%d size=%d\n",
i, urb->number_of_packets,
- iso_packet[i].status, pipe_handle,
+ iso_packet[i].status, pipe,
submit_handle, iso_packet[i].length);
urb->iso_frame_desc[i].status = -EREMOTEIO;
}
@@ -2204,26 +2193,26 @@ static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb,
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);
+ dev_dbg(dev, "status=stall pipe=%p submit=%d size=%d\n",
+ pipe, 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);
+ dev_dbg(dev, "status=babble pipe=%p submit=%d size=%d\n",
+ pipe, 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);
+ dev_dbg(dev, "status=short pipe=%p submit=%d size=%d\n",
+ pipe, 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);
+ dev_dbg(dev, "status=%d pipe=%p submit=%d size=%d\n",
+ status, pipe, submit_handle, bytes_transferred);
urb->status = -EPROTO;
break;
}
@@ -2248,7 +2237,6 @@ 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 */
@@ -2294,9 +2282,8 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb,
__cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
}
- 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,
+ octeon_usb_urb_complete_callback(usb, complete_code, pipe,
submit_handle,
transaction->actual_bytes,
transaction->urb);
@@ -2311,8 +2298,7 @@ done:
* of transactions.
*
* @usb:
- * @pipe_handle:
- * Which pipe to submit to. Will be validated in this function.
+ * @pipe: Which pipe to submit to.
* @type: Transaction type
* @buffer: User buffer for the transaction
* @buffer_length:
@@ -2331,7 +2317,7 @@ done:
* in the external API.
*/
static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
- int pipe_handle,
+ struct cvmx_usb_pipe *pipe,
enum cvmx_usb_transfer type,
uint64_t buffer,
int buffer_length,
@@ -2343,10 +2329,7 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
{
int submit_handle;
struct cvmx_usb_transaction *transaction;
- struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
/* Fail if the pipe isn't open */
if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
return -EINVAL;
@@ -2400,19 +2383,19 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
* Call to submit a USB Bulk transfer to a pipe.
*
* @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe_handle:
- * Handle to the pipe for the transfer.
+ * @pipe: Handle to the pipe for the transfer.
* @urb: URB.
*
* 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,
+static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb,
+ struct cvmx_usb_pipe *pipe,
struct urb *urb)
{
int submit_handle;
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe,
CVMX_USB_TRANSFER_BULK,
urb->transfer_dma,
urb->transfer_buffer_length,
@@ -2429,19 +2412,19 @@ static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, int pipe_handle,
* Call to submit a USB Interrupt transfer to a pipe.
*
* @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe_handle:
- * Handle to the pipe for the transfer.
+ * @pipe: Handle to the pipe for the transfer.
* @urb: URB returned when the 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, struct urb *urb)
+ struct cvmx_usb_pipe *pipe,
+ struct urb *urb)
{
int submit_handle;
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe,
CVMX_USB_TRANSFER_INTERRUPT,
urb->transfer_dma,
urb->transfer_buffer_length,
@@ -2458,14 +2441,14 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
* Call to submit a USB Control transfer to a pipe.
*
* @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe_handle:
- * Handle to the pipe for the transfer.
+ * @pipe: Handle to the pipe for the transfer.
* @urb: URB.
*
* Returns: A submitted transaction handle or negative on
* failure. Negative values are error codes.
*/
-static int cvmx_usb_submit_control(struct cvmx_usb_state *usb, int pipe_handle,
+static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,
+ struct cvmx_usb_pipe *pipe,
struct urb *urb)
{
int submit_handle;
@@ -2474,11 +2457,10 @@ static int cvmx_usb_submit_control(struct cvmx_usb_state *usb, int pipe_handle,
union cvmx_usb_control_header *header =
cvmx_phys_to_ptr(control_header);
- /* Pipe handle checking is done later in a common place */
if ((header->s.request_type & 0x80) == 0)
buffer_length = le16_to_cpu(header->s.length);
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe,
CVMX_USB_TRANSFER_CONTROL,
urb->transfer_dma,
buffer_length,
@@ -2495,21 +2477,21 @@ static int cvmx_usb_submit_control(struct cvmx_usb_state *usb, int pipe_handle,
* Call to submit a USB Isochronous transfer to a pipe.
*
* @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe_handle:
- * Handle to the pipe for the transfer.
+ * @pipe: Handle to the pipe for the transfer.
* @urb: URB returned when the callback is called.
*
* Returns: A submitted transaction handle or negative on
* failure. Negative values are error codes.
*/
static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb,
- int pipe_handle, struct urb *urb)
+ struct cvmx_usb_pipe *pipe,
+ struct urb *urb)
{
int submit_handle;
struct cvmx_usb_iso_packet *packets;
packets = (struct cvmx_usb_iso_packet *) urb->setup_packet;
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe,
CVMX_USB_TRANSFER_ISOCHRONOUS,
urb->transfer_dma,
urb->transfer_buffer_length,
@@ -2530,22 +2512,19 @@ static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb,
* associated callback.
*
* @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe_handle:
- * Pipe handle to cancel requests in.
+ * @pipe: Pipe to cancel requests in.
* @submit_handle:
* Handle to transaction to cancel, returned by the submit
* function.
*
* Returns: 0 or a negative error code.
*/
-static int cvmx_usb_cancel(struct cvmx_usb_state *usb, int pipe_handle,
+static int cvmx_usb_cancel(struct cvmx_usb_state *usb,
+ struct cvmx_usb_pipe *pipe,
int submit_handle)
{
struct cvmx_usb_transaction *transaction;
- struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
if (unlikely((submit_handle < 0) || (submit_handle >= MAX_TRANSACTIONS)))
return -EINVAL;
@@ -2592,25 +2571,20 @@ static int cvmx_usb_cancel(struct cvmx_usb_state *usb, int pipe_handle,
* does is call cvmx_usb_cancel() in a loop.
*
* @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe_handle:
- * Pipe handle to cancel requests in.
+ * @pipe: Pipe to cancel requests in.
*
* Returns: 0 or a negative error code.
*/
-static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb, int pipe_handle)
+static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb,
+ struct cvmx_usb_pipe *pipe)
{
- struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
-
/* Fail if the pipe isn't open */
if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
return -EINVAL;
/* Simply loop through and attempt to cancel each transaction */
while (pipe->head) {
- int result = cvmx_usb_cancel(usb, pipe_handle,
+ int result = cvmx_usb_cancel(usb, pipe,
__cvmx_usb_get_submit_handle(usb, pipe->head));
if (unlikely(result != 0))
return result;
@@ -2623,19 +2597,14 @@ static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb, int pipe_handle)
* Close a pipe created with cvmx_usb_open_pipe().
*
* @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe_handle:
- * Pipe handle to close.
+ * @pipe: Pipe to close.
*
* Returns: 0 or a negative error code. EBUSY is returned if the pipe has
* outstanding transfers.
*/
-static int cvmx_usb_close_pipe(struct cvmx_usb_state *usb, int pipe_handle)
+static int cvmx_usb_close_pipe(struct cvmx_usb_state *usb,
+ struct cvmx_usb_pipe *pipe)
{
- struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
-
/* Fail if the pipe isn't open */
if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
return -EINVAL;
@@ -3263,7 +3232,7 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
struct octeon_hcd *priv = hcd_to_octeon(hcd);
struct device *dev = hcd->self.controller;
int submit_handle = -1;
- int pipe_handle;
+ struct cvmx_usb_pipe *pipe;
unsigned long flags;
struct cvmx_usb_iso_packet *iso_packet;
struct usb_host_endpoint *ep = urb->ep;
@@ -3332,25 +3301,24 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
dev = dev->parent;
}
}
- pipe_handle = cvmx_usb_open_pipe(&priv->usb,
- usb_pipedevice(urb->pipe),
- usb_pipeendpoint(urb->pipe),
- speed,
- le16_to_cpu(ep->desc.wMaxPacketSize) & 0x7ff,
- transfer_type,
- usb_pipein(urb->pipe) ? CVMX_USB_DIRECTION_IN : CVMX_USB_DIRECTION_OUT,
- urb->interval,
- (le16_to_cpu(ep->desc.wMaxPacketSize) >> 11) & 0x3,
- split_device,
- split_port);
- if (pipe_handle < 0) {
+ pipe = cvmx_usb_open_pipe(&priv->usb, usb_pipedevice(urb->pipe),
+ usb_pipeendpoint(urb->pipe), speed,
+ le16_to_cpu(ep->desc.wMaxPacketSize) & 0x7ff,
+ transfer_type,
+ usb_pipein(urb->pipe) ?
+ CVMX_USB_DIRECTION_IN :
+ CVMX_USB_DIRECTION_OUT,
+ urb->interval,
+ (le16_to_cpu(ep->desc.wMaxPacketSize) >> 11) & 0x3,
+ split_device, split_port);
+ if (!pipe) {
spin_unlock_irqrestore(&priv->lock, flags);
dev_dbg(dev, "Failed to create pipe\n");
return -ENOMEM;
}
- ep->hcpriv = (void *)(long)pipe_handle;
+ ep->hcpriv = pipe;
} else {
- pipe_handle = (long)ep->hcpriv;
+ pipe = ep->hcpriv;
}
switch (usb_pipetype(urb->pipe)) {
@@ -3379,8 +3347,7 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
*/
urb->setup_packet = (char *)iso_packet;
submit_handle = cvmx_usb_submit_isochronous(&priv->usb,
- pipe_handle,
- urb);
+ pipe, urb);
/*
* If submit failed we need to free our private packet
* list.
@@ -3394,20 +3361,18 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
case PIPE_INTERRUPT:
dev_dbg(dev, "Submit interrupt to %d.%d\n",
usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
- submit_handle = cvmx_usb_submit_interrupt(&priv->usb,
- pipe_handle, urb);
+ submit_handle = cvmx_usb_submit_interrupt(&priv->usb, pipe,
+ urb);
break;
case PIPE_CONTROL:
dev_dbg(dev, "Submit control to %d.%d\n",
usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
- submit_handle = cvmx_usb_submit_control(&priv->usb, pipe_handle,
- urb);
+ submit_handle = cvmx_usb_submit_control(&priv->usb, pipe, urb);
break;
case PIPE_BULK:
dev_dbg(dev, "Submit bulk to %d.%d\n",
usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
- submit_handle = cvmx_usb_submit_bulk(&priv->usb, pipe_handle,
- urb);
+ submit_handle = cvmx_usb_submit_bulk(&priv->usb, pipe, urb);
break;
}
if (submit_handle < 0) {
@@ -3428,15 +3393,13 @@ static void octeon_usb_urb_dequeue_work(unsigned long arg)
spin_lock_irqsave(&priv->lock, flags);
while (!list_empty(&priv->dequeue_list)) {
- int pipe_handle;
int submit_handle;
struct urb *urb = container_of(priv->dequeue_list.next, struct urb, urb_list);
list_del(&urb->urb_list);
/* not enqueued on dequeue_list */
INIT_LIST_HEAD(&urb->urb_list);
- pipe_handle = (long)urb->ep->hcpriv;
submit_handle = (long)urb->hcpriv;
- cvmx_usb_cancel(&priv->usb, pipe_handle, submit_handle);
+ cvmx_usb_cancel(&priv->usb, urb->ep->hcpriv, submit_handle);
}
spin_unlock_irqrestore(&priv->lock, flags);
@@ -3468,12 +3431,12 @@ static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, struct usb_host_end
if (ep->hcpriv) {
struct octeon_hcd *priv = hcd_to_octeon(hcd);
- int pipe_handle = (long)ep->hcpriv;
+ struct cvmx_usb_pipe *pipe = ep->hcpriv;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
- cvmx_usb_cancel_all(&priv->usb, pipe_handle);
- if (cvmx_usb_close_pipe(&priv->usb, pipe_handle))
- dev_dbg(dev, "Closing pipe %d failed\n", pipe_handle);
+ cvmx_usb_cancel_all(&priv->usb, pipe);
+ if (cvmx_usb_close_pipe(&priv->usb, pipe))
+ dev_dbg(dev, "Closing pipe %p failed\n", pipe);
spin_unlock_irqrestore(&priv->lock, flags);
ep->hcpriv = NULL;
}

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