[PATCH 13/14] staging: octeon-usb: eliminate submit_handle
Aaro Koskinen
aaro.koskinen at iki.fi
Sun Oct 6 19:22:36 UTC 2013
Eliminate submit_handle, use a direct reference instead.
Signed-off-by: Aaro Koskinen <aaro.koskinen at iki.fi>
---
drivers/staging/octeon-usb/octeon-hcd.c | 232 +++++++++++++-------------------
1 file changed, 90 insertions(+), 142 deletions(-)
diff --git a/drivers/staging/octeon-usb/octeon-hcd.c b/drivers/staging/octeon-usb/octeon-hcd.c
index b07425c..368c7f7 100644
--- a/drivers/staging/octeon-usb/octeon-hcd.c
+++ b/drivers/staging/octeon-usb/octeon-hcd.c
@@ -1252,22 +1252,6 @@ static struct cvmx_usb_port_status cvmx_usb_get_status(struct cvmx_usb_state *us
}
/**
- * Convert a USB transaction into a handle
- *
- * @usb: USB device state populated by cvmx_usb_initialize().
- * @transaction:
- * Transaction to get handle for
- *
- * Returns: Handle
- */
-static inline int __cvmx_usb_get_submit_handle(struct cvmx_usb_state *usb,
- struct cvmx_usb_transaction *transaction)
-{
- return ((unsigned long)transaction - (unsigned long)usb->transaction) /
- sizeof(*transaction);
-}
-
-/**
* Open a virtual pipe between the host and a USB device. A pipe
* must be opened before data can be transferred between a device
* and Octeon.
@@ -2131,7 +2115,8 @@ 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,
struct cvmx_usb_pipe *pipe,
- int submit_handle,
+ struct cvmx_usb_transaction
+ *transaction,
int bytes_transferred,
struct urb *urb)
{
@@ -2172,10 +2157,10 @@ 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=%p submit=%d size=%d\n",
+ dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%p transaction=%p size=%d\n",
i, urb->number_of_packets,
iso_packet[i].status, pipe,
- submit_handle, iso_packet[i].length);
+ transaction, iso_packet[i].length);
urb->iso_frame_desc[i].status = -EREMOTEIO;
}
}
@@ -2193,26 +2178,26 @@ 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=%p submit=%d size=%d\n",
- pipe, submit_handle, bytes_transferred);
+ dev_dbg(dev, "status=stall pipe=%p transaction=%p size=%d\n",
+ pipe, transaction, bytes_transferred);
urb->status = -EPIPE;
break;
case CVMX_USB_COMPLETE_BABBLEERR:
- dev_dbg(dev, "status=babble pipe=%p submit=%d size=%d\n",
- pipe, submit_handle, bytes_transferred);
+ dev_dbg(dev, "status=babble pipe=%p transaction=%p size=%d\n",
+ pipe, transaction, bytes_transferred);
urb->status = -EPIPE;
break;
case CVMX_USB_COMPLETE_SHORT:
- dev_dbg(dev, "status=short pipe=%p submit=%d size=%d\n",
- pipe, submit_handle, bytes_transferred);
+ dev_dbg(dev, "status=short pipe=%p transaction=%p size=%d\n",
+ pipe, transaction, 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=%p submit=%d size=%d\n",
- status, pipe, submit_handle, bytes_transferred);
+ dev_dbg(dev, "status=%d pipe=%p transaction=%p size=%d\n",
+ status, pipe, transaction, bytes_transferred);
urb->status = -EPROTO;
break;
}
@@ -2237,8 +2222,6 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb,
struct cvmx_usb_transaction *transaction,
enum cvmx_usb_complete complete_code)
{
- int submit_handle;
-
/* If this was a split then clear our split in progress marker */
if (usb->active_split == transaction)
usb->active_split = NULL;
@@ -2282,9 +2265,8 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb,
__cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
}
- submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
octeon_usb_urb_complete_callback(usb, complete_code, pipe,
- submit_handle,
+ transaction,
transaction->actual_bytes,
transaction->urb);
__cvmx_usb_free_transaction(usb, transaction);
@@ -2313,32 +2295,30 @@ done:
* A description of each ISO packet
* @urb: URB for the callback
*
- * Returns: Submit handle or negative on failure. Matches the result
- * in the external API.
+ * Returns: Transaction or NULL on failure.
*/
-static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
- struct cvmx_usb_pipe *pipe,
- enum cvmx_usb_transfer type,
- uint64_t buffer,
- int buffer_length,
- uint64_t control_header,
- int iso_start_frame,
- int iso_number_packets,
- struct cvmx_usb_iso_packet *iso_packets,
- struct urb *urb)
+static struct cvmx_usb_transaction *__cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
+ struct cvmx_usb_pipe *pipe,
+ enum cvmx_usb_transfer type,
+ uint64_t buffer,
+ int buffer_length,
+ uint64_t control_header,
+ int iso_start_frame,
+ int iso_number_packets,
+ struct cvmx_usb_iso_packet *iso_packets,
+ struct urb *urb)
{
- int submit_handle;
struct cvmx_usb_transaction *transaction;
/* Fail if the pipe isn't open */
if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
+ return NULL;
if (unlikely(pipe->transfer_type != type))
- return -EINVAL;
+ return NULL;
transaction = __cvmx_usb_alloc_transaction(usb);
if (unlikely(!transaction))
- return -ENOMEM;
+ return NULL;
transaction->type = type;
transaction->buffer = buffer;
@@ -2369,13 +2349,11 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
}
pipe->tail = transaction;
- submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
-
/* We may need to schedule the pipe if this was the head of the pipe */
if (!transaction->prev)
__cvmx_usb_schedule(usb, 0);
- return submit_handle;
+ return transaction;
}
@@ -2386,25 +2364,20 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
* @pipe: Handle to the pipe for the transfer.
* @urb: URB.
*
- * Returns: A submitted transaction handle or negative on
- * failure. Negative values are error codes.
+ * Returns: A submitted transaction or NULL on failure.
*/
-static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb,
- struct cvmx_usb_pipe *pipe,
- struct urb *urb)
+static struct cvmx_usb_transaction *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,
- CVMX_USB_TRANSFER_BULK,
- urb->transfer_dma,
- urb->transfer_buffer_length,
- 0, /* control_header */
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- urb);
- return submit_handle;
+ return __cvmx_usb_submit_transaction(usb, pipe, CVMX_USB_TRANSFER_BULK,
+ urb->transfer_dma,
+ urb->transfer_buffer_length,
+ 0, /* control_header */
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ urb);
}
@@ -2415,25 +2388,21 @@ static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb,
* @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.
+ * Returns: A submitted transaction or NULL on failure.
*/
-static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
- struct cvmx_usb_pipe *pipe,
- struct urb *urb)
+static struct cvmx_usb_transaction *cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
+ struct cvmx_usb_pipe *pipe,
+ struct urb *urb)
{
- int submit_handle;
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe,
- CVMX_USB_TRANSFER_INTERRUPT,
- urb->transfer_dma,
- urb->transfer_buffer_length,
- 0, /* control_header */
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- urb);
- return submit_handle;
+ return __cvmx_usb_submit_transaction(usb, pipe,
+ CVMX_USB_TRANSFER_INTERRUPT,
+ urb->transfer_dma,
+ urb->transfer_buffer_length,
+ 0, /* control_header */
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ urb);
}
@@ -2444,14 +2413,12 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
* @pipe: Handle to the pipe for the transfer.
* @urb: URB.
*
- * Returns: A submitted transaction handle or negative on
- * failure. Negative values are error codes.
+ * Returns: A submitted transaction or NULL on failure.
*/
-static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,
- struct cvmx_usb_pipe *pipe,
- struct urb *urb)
+static struct cvmx_usb_transaction *cvmx_usb_submit_control(struct cvmx_usb_state *usb,
+ struct cvmx_usb_pipe *pipe,
+ struct urb *urb)
{
- int submit_handle;
int buffer_length = urb->transfer_buffer_length;
uint64_t control_header = urb->setup_dma;
union cvmx_usb_control_header *header =
@@ -2460,16 +2427,14 @@ static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,
if ((header->s.request_type & 0x80) == 0)
buffer_length = le16_to_cpu(header->s.length);
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe,
- CVMX_USB_TRANSFER_CONTROL,
- urb->transfer_dma,
- buffer_length,
- control_header,
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- urb);
- return submit_handle;
+ return __cvmx_usb_submit_transaction(usb, pipe,
+ CVMX_USB_TRANSFER_CONTROL,
+ urb->transfer_dma, buffer_length,
+ control_header,
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ urb);
}
@@ -2480,27 +2445,23 @@ static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,
* @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.
+ * Returns: A submitted transaction or NULL on failure.
*/
-static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb,
- struct cvmx_usb_pipe *pipe,
- struct urb *urb)
+static struct cvmx_usb_transaction *cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb,
+ 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,
- CVMX_USB_TRANSFER_ISOCHRONOUS,
- urb->transfer_dma,
- urb->transfer_buffer_length,
- 0, /* control_header */
- urb->start_frame,
- urb->number_of_packets,
- packets,
- urb);
- return submit_handle;
+ return __cvmx_usb_submit_transaction(usb, pipe,
+ CVMX_USB_TRANSFER_ISOCHRONOUS,
+ urb->transfer_dma,
+ urb->transfer_buffer_length,
+ 0, /* control_header */
+ urb->start_frame,
+ urb->number_of_packets,
+ packets, urb);
}
@@ -2513,27 +2474,18 @@ static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb,
*
* @usb: USB device state populated by cvmx_usb_initialize().
* @pipe: Pipe to cancel requests in.
- * @submit_handle:
- * Handle to transaction to cancel, returned by the submit
- * function.
+ * @transaction: 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,
struct cvmx_usb_pipe *pipe,
- int submit_handle)
+ struct cvmx_usb_transaction *transaction)
{
- struct cvmx_usb_transaction *transaction;
-
- if (unlikely((submit_handle < 0) || (submit_handle >= MAX_TRANSACTIONS)))
- return -EINVAL;
-
/* Fail if the pipe isn't open */
if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
return -EINVAL;
- transaction = usb->transaction + submit_handle;
-
/* Fail if this transaction already completed */
if (unlikely((transaction->flags & __CVMX_USB_TRANSACTION_FLAGS_IN_USE) == 0))
return -EINVAL;
@@ -2584,8 +2536,7 @@ static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb,
/* Simply loop through and attempt to cancel each transaction */
while (pipe->head) {
- int result = cvmx_usb_cancel(usb, pipe,
- __cvmx_usb_get_submit_handle(usb, pipe->head));
+ int result = cvmx_usb_cancel(usb, pipe, pipe->head);
if (unlikely(result != 0))
return result;
}
@@ -3231,7 +3182,7 @@ 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;
+ struct cvmx_usb_transaction *transaction = NULL;
struct cvmx_usb_pipe *pipe;
unsigned long flags;
struct cvmx_usb_iso_packet *iso_packet;
@@ -3346,13 +3297,13 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
* this saves us a bunch of logic.
*/
urb->setup_packet = (char *)iso_packet;
- submit_handle = cvmx_usb_submit_isochronous(&priv->usb,
- pipe, urb);
+ transaction = cvmx_usb_submit_isochronous(&priv->usb,
+ pipe, urb);
/*
* If submit failed we need to free our private packet
* list.
*/
- if (submit_handle < 0) {
+ if (!transaction) {
urb->setup_packet = NULL;
kfree(iso_packet);
}
@@ -3361,26 +3312,25 @@ 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,
- urb);
+ transaction = 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, urb);
+ transaction = 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, urb);
+ transaction = cvmx_usb_submit_bulk(&priv->usb, pipe, urb);
break;
}
- if (submit_handle < 0) {
+ if (!transaction) {
spin_unlock_irqrestore(&priv->lock, flags);
dev_dbg(dev, "Failed to submit\n");
return -ENOMEM;
}
- urb->hcpriv = (void *)(long)submit_handle;
+ urb->hcpriv = transaction;
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
@@ -3393,13 +3343,11 @@ static void octeon_usb_urb_dequeue_work(unsigned long arg)
spin_lock_irqsave(&priv->lock, flags);
while (!list_empty(&priv->dequeue_list)) {
- 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);
- submit_handle = (long)urb->hcpriv;
- cvmx_usb_cancel(&priv->usb, urb->ep->hcpriv, submit_handle);
+ cvmx_usb_cancel(&priv->usb, urb->ep->hcpriv, urb->hcpriv);
}
spin_unlock_irqrestore(&priv->lock, flags);
--
1.8.4.rc3
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