Add a quirk for Alereon HWA devices to concatenate the frames of isoc
transfer requests.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch serializes access to the HWA data transfer out (DTO)
endpoint. This prevents a situation where two transfer requests being
sent concurrently to separate downstream endpoints could interleave
their transfer request and transfer data packets causing data
corruption. The transfer processing code will now attempt to acquire
the DTO resource before sending a transfer to the HWA. If it cannot
acquire the resource, the RPIPE that the transfer is assigned to will
be placed on a waiting list. When the DTO resource is released, the
actor releasing the resource will serivce the RPIPEs that are waiting.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch adds support for isochronous out transfers to the HWA. The
primary changes are:
1. Add a isoc_pack_desc_urb field to struct wa_seg. This urb is used
to send the isochronous packet info message to the HWA which describes
the isoc data segment(s) that will be sent as the payload of the
transfer request.
2. Use the URB iso_frame_desc field to populate the isochronous packet
info message and data segments sent to the HWA.
3. After the data is sent and transfer result is returned from the
HWA, read the isoc packet status message from the HWA. The contents of
the isoc packet status message are used to set the iso_frame_desc
status and actual_length fields in the original isoc URB. This feature
required the addition of a some state tracking variables in struct wahc
so the dti_urb knows what type of packet it expects to receive next.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rename xfer_result to dti_buf and xfer_result_size to dti_buf_size in
struct wahc. The dti buffer will also be used for isochronous status
packets once isochronous transfers are supported.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When the HWA encounters a STALL on a control endpoint, it should clear the
RPIPE_STALL feature on the RPIPE before processing the next transfer
request. Otherwise, all transfer requests on that endpoint after the
first STALL will fail because the RPIPE is still in the halted state.
This also removes the unneccessary call to spin_lock_irqsave for a nested
lock that was present in the first patch.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Pugliese