mReq->ptr->token |= cpu_to_le32(TD_IOC);
}
mReq->ptr->page[0] = cpu_to_le32(mReq->req.dma);
- for (i = 1; i < 5; i++) {
+ for (i = 1; i < TD_PAGE_COUNT; i++) {
u32 page = mReq->req.dma + i * CI13XXX_PAGE_SIZE;
page &= ~TD_RESERVED_MASK;
mReq->ptr->page[i] = cpu_to_le32(page);
}
+ wmb();
+
if (!list_empty(&mEp->qh.queue)) {
struct ci13xxx_req *mReqPrev;
int n = hw_ep_bit(mEp->num, mEp->dir);
*/
static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
{
+ u32 tmptoken = le32_to_cpu(mReq->ptr->token);
+
if (mReq->req.status != -EALREADY)
return -EINVAL;
- if ((cpu_to_le32(TD_STATUS_ACTIVE) & mReq->ptr->token) != 0)
+ if ((TD_STATUS_ACTIVE & tmptoken) != 0)
return -EBUSY;
if (mReq->zptr) {
usb_gadget_unmap_request(&mEp->ci->gadget, &mReq->req, mEp->dir);
- mReq->req.status = le32_to_cpu(mReq->ptr->token) & TD_STATUS;
+ mReq->req.status = tmptoken & TD_STATUS;
if ((TD_STATUS_HALTED & mReq->req.status) != 0)
mReq->req.status = -1;
else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
mReq->req.status = -1;
- mReq->req.actual = le32_to_cpu(mReq->ptr->token) & TD_TOTAL_BYTES;
+ mReq->req.actual = tmptoken & TD_TOTAL_BYTES;
mReq->req.actual >>= __ffs(TD_TOTAL_BYTES);
mReq->req.actual = mReq->req.length - mReq->req.actual;
mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
usb_ep_free_request(ep, req);
}
+/**
+ * _ep_queue: queues (submits) an I/O request to an endpoint
+ *
+ * Caller must hold lock
+ */
+static int _ep_queue(struct usb_ep *ep, struct usb_request *req,
+ gfp_t __maybe_unused gfp_flags)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
+ struct ci13xxx *ci = mEp->ci;
+ int retval = 0;
+
+ if (ep == NULL || req == NULL || mEp->ep.desc == NULL)
+ return -EINVAL;
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
+ if (req->length)
+ mEp = (ci->ep0_dir == RX) ?
+ ci->ep0out : ci->ep0in;
+ if (!list_empty(&mEp->qh.queue)) {
+ _ep_nuke(mEp);
+ retval = -EOVERFLOW;
+ dev_warn(mEp->ci->dev, "endpoint ctrl %X nuked\n",
+ _usb_addr(mEp));
+ }
+ }
+
+ /* first nuke then test link, e.g. previous status has not sent */
+ if (!list_empty(&mReq->queue)) {
+ dev_err(mEp->ci->dev, "request already in queue\n");
+ return -EBUSY;
+ }
+
+ if (req->length > (TD_PAGE_COUNT - 1) * CI13XXX_PAGE_SIZE) {
+ dev_err(mEp->ci->dev, "request bigger than one td\n");
+ return -EMSGSIZE;
+ }
+
+ /* push request */
+ mReq->req.status = -EINPROGRESS;
+ mReq->req.actual = 0;
+
+ retval = _hardware_enqueue(mEp, mReq);
+
+ if (retval == -EALREADY)
+ retval = 0;
+ if (!retval)
+ list_add_tail(&mReq->queue, &mEp->qh.queue);
+
+ return retval;
+}
+
/**
* isr_get_status_response: get_status request response
* @ci: ci struct
}
/* else do nothing; reserved for future use */
- spin_unlock(mEp->lock);
- retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
- spin_lock(mEp->lock);
+ retval = _ep_queue(&mEp->ep, req, gfp_flags);
if (retval)
goto err_free_buf;
* This function returns an error code
*/
static int isr_setup_status_phase(struct ci13xxx *ci)
-__releases(mEp->lock)
-__acquires(mEp->lock)
{
int retval;
struct ci13xxx_ep *mEp;
ci->status->context = ci;
ci->status->complete = isr_setup_status_complete;
- spin_unlock(mEp->lock);
- retval = usb_ep_queue(&mEp->ep, ci->status, GFP_ATOMIC);
- spin_lock(mEp->lock);
+ retval = _ep_queue(&mEp->ep, ci->status, GFP_ATOMIC);
return retval;
}
gfp_t __maybe_unused gfp_flags)
{
struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
- struct ci13xxx *ci = mEp->ci;
int retval = 0;
unsigned long flags;
return -EINVAL;
spin_lock_irqsave(mEp->lock, flags);
-
- if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
- if (req->length)
- mEp = (ci->ep0_dir == RX) ?
- ci->ep0out : ci->ep0in;
- if (!list_empty(&mEp->qh.queue)) {
- _ep_nuke(mEp);
- retval = -EOVERFLOW;
- dev_warn(mEp->ci->dev, "endpoint ctrl %X nuked\n",
- _usb_addr(mEp));
- }
- }
-
- /* first nuke then test link, e.g. previous status has not sent */
- if (!list_empty(&mReq->queue)) {
- retval = -EBUSY;
- dev_err(mEp->ci->dev, "request already in queue\n");
- goto done;
- }
-
- if (req->length > 4 * CI13XXX_PAGE_SIZE) {
- req->length = 4 * CI13XXX_PAGE_SIZE;
- retval = -EMSGSIZE;
- dev_warn(mEp->ci->dev, "request length truncated\n");
- }
-
- /* push request */
- mReq->req.status = -EINPROGRESS;
- mReq->req.actual = 0;
-
- retval = _hardware_enqueue(mEp, mReq);
-
- if (retval == -EALREADY)
- retval = 0;
- if (!retval)
- list_add_tail(&mReq->queue, &mEp->qh.queue);
-
- done:
+ retval = _ep_queue(ep, req, gfp_flags);
spin_unlock_irqrestore(mEp->lock, flags);
return retval;
}