staging: octeon-usb: use list.h for transactions
Use list.h helpers for transactions. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aaro Koskinen
Greg Kroah-Hartman
Родитель
4a23ee1bd7
Коммит
5669601d92
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@ -306,8 +306,7 @@ enum cvmx_usb_stage {
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* regardless of type. These are linked together
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* to form a list of pending requests for a pipe.
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*
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* @prev: Transaction before this one in the pipe.
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* @next: Transaction after this one in the pipe.
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* @node: List node for transactions in the pipe.
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* @type: Type of transaction, duplicated of the pipe.
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* @flags: State flags for this transaction.
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* @buffer: User's physical buffer address to read/write.
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@ -323,8 +322,7 @@ enum cvmx_usb_stage {
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* @urb: URB.
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*/
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struct cvmx_usb_transaction {
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struct cvmx_usb_transaction *prev;
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struct cvmx_usb_transaction *next;
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struct list_head node;
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enum cvmx_usb_transfer type;
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uint64_t buffer;
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int buffer_length;
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@ -347,8 +345,7 @@ struct cvmx_usb_transaction {
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*
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* @node: List node for pipe list
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* @next: Pipe after this one in the list
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* @head: The first pending transaction
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* @tail: The last pending transaction
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* @transactions: List of pending transactions
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* @interval: For periodic pipes, the interval between packets in
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* frames
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* @next_tx_frame: The next frame this pipe is allowed to transmit on
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@ -370,8 +367,7 @@ struct cvmx_usb_transaction {
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*/
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struct cvmx_usb_pipe {
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struct list_head node;
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struct cvmx_usb_transaction *head;
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struct cvmx_usb_transaction *tail;
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struct list_head transactions;
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uint64_t interval;
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uint64_t next_tx_frame;
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enum cvmx_usb_pipe_flags flags;
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@ -1219,6 +1215,8 @@ static struct cvmx_usb_pipe *cvmx_usb_open_pipe(struct cvmx_usb_state *usb,
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pipe->max_packet = max_packet;
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pipe->transfer_type = transfer_type;
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pipe->transfer_dir = transfer_dir;
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INIT_LIST_HEAD(&pipe->transactions);
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/*
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* All pipes use interval to rate limit NAK processing. Force an
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* interval if one wasn't supplied
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@ -1444,7 +1442,9 @@ static void __cvmx_usb_start_channel_control(struct cvmx_usb_state *usb,
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int channel,
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struct cvmx_usb_pipe *pipe)
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{
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struct cvmx_usb_transaction *transaction = pipe->head;
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struct cvmx_usb_transaction *transaction =
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list_first_entry(&pipe->transactions, typeof(*transaction),
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node);
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union cvmx_usb_control_header *header =
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cvmx_phys_to_ptr(transaction->control_header);
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int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
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@ -1573,7 +1573,9 @@ static void __cvmx_usb_start_channel(struct cvmx_usb_state *usb,
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int channel,
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struct cvmx_usb_pipe *pipe)
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{
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struct cvmx_usb_transaction *transaction = pipe->head;
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struct cvmx_usb_transaction *transaction =
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list_first_entry(&pipe->transactions, typeof(*transaction),
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node);
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/* Make sure all writes to the DMA region get flushed */
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CVMX_SYNCW;
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@ -1872,12 +1874,14 @@ static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe(struct cvmx_usb_state *u
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struct cvmx_usb_pipe *pipe;
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list_for_each_entry(pipe, list, node) {
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if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && pipe->head &&
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struct cvmx_usb_transaction *t =
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list_first_entry(&pipe->transactions, typeof(*t), node);
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if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && t &&
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(pipe->next_tx_frame <= current_frame) &&
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((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) &&
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(!usb->active_split || (usb->active_split == pipe->head))) {
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(!usb->active_split || (usb->active_split == t))) {
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CVMX_PREFETCH(pipe, 128);
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CVMX_PREFETCH(pipe->head, 0);
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CVMX_PREFETCH(t, 0);
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return pipe;
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}
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}
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@ -2104,15 +2108,8 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb,
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}
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/* Remove the transaction from the pipe list */
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if (transaction->next)
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transaction->next->prev = transaction->prev;
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else
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pipe->tail = transaction->prev;
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if (transaction->prev)
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transaction->prev->next = transaction->next;
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else
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pipe->head = transaction->next;
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if (!pipe->head)
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list_del(&transaction->node);
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if (list_empty(&pipe->transactions))
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list_move_tail(&pipe->node, &usb->idle_pipes);
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octeon_usb_urb_complete_callback(usb, complete_code, pipe,
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transaction,
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@ -2180,24 +2177,19 @@ static struct cvmx_usb_transaction *__cvmx_usb_submit_transaction(struct cvmx_us
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else
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transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
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transaction->next = NULL;
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if (pipe->tail) {
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transaction->prev = pipe->tail;
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transaction->prev->next = transaction;
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if (!list_empty(&pipe->transactions)) {
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list_add_tail(&transaction->node, &pipe->transactions);
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} else {
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if (pipe->next_tx_frame < usb->frame_number)
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pipe->next_tx_frame = usb->frame_number + pipe->interval -
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(usb->frame_number - pipe->next_tx_frame) % pipe->interval;
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transaction->prev = NULL;
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pipe->head = transaction;
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list_add_tail(&transaction->node, &pipe->transactions);
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list_move_tail(&pipe->node,
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&usb->active_pipes[pipe->transfer_type]);
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}
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pipe->tail = transaction;
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/* We may need to schedule the pipe if this was the head of the pipe */
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if (!transaction->prev)
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/*
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* We may need to schedule the pipe if this was the head of the
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* pipe.
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*/
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__cvmx_usb_schedule(usb, 0);
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}
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return transaction;
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}
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@ -2332,8 +2324,8 @@ static int cvmx_usb_cancel(struct cvmx_usb_state *usb,
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* If the transaction is the HEAD of the queue and scheduled. We need to
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* treat it special
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*/
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if ((pipe->head == transaction) &&
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(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) {
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if (list_first_entry(&pipe->transactions, typeof(*transaction), node) ==
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transaction && (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) {
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union cvmx_usbcx_hccharx usbc_hcchar;
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usb->pipe_for_channel[pipe->channel] = NULL;
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@ -2368,9 +2360,11 @@ static int cvmx_usb_cancel(struct cvmx_usb_state *usb,
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static int cvmx_usb_cancel_all(struct cvmx_usb_state *usb,
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struct cvmx_usb_pipe *pipe)
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{
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struct cvmx_usb_transaction *transaction, *next;
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/* Simply loop through and attempt to cancel each transaction */
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while (pipe->head) {
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int result = cvmx_usb_cancel(usb, pipe, pipe->head);
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list_for_each_entry_safe(transaction, next, &pipe->transactions, node) {
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int result = cvmx_usb_cancel(usb, pipe, transaction);
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if (unlikely(result != 0))
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return result;
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}
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@ -2391,7 +2385,7 @@ static int cvmx_usb_close_pipe(struct cvmx_usb_state *usb,
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struct cvmx_usb_pipe *pipe)
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{
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/* Fail if the pipe has pending transactions */
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if (unlikely(pipe->head))
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if (!list_empty(&pipe->transactions))
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return -EBUSY;
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list_del(&pipe->node);
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@ -2499,7 +2493,8 @@ static int __cvmx_usb_poll_channel(struct cvmx_usb_state *usb, int channel)
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CVMX_PREFETCH(pipe, 128);
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if (!pipe)
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return 0;
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transaction = pipe->head;
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transaction = list_first_entry(&pipe->transactions, typeof(*transaction),
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node);
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CVMX_PREFETCH(transaction, 0);
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/*
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