#include "xhci-trace.h"
#include "xhci-mtk.h"
+static int queue_command(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ u32 field1, u32 field2,
+ u32 field3, u32 field4, bool command_must_succeed);
+
/*
* Returns zero if the TRB isn't in this segment, otherwise it returns the DMA
* address of the TRB.
/*
* See Cycle bit rules. SW is the consumer for the event ring only.
- * Don't make a ring full of link TRBs. That would be dumb and this would loop.
*/
void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring)
{
+ unsigned int link_trb_count = 0;
+
/* event ring doesn't have link trbs, check for last trb */
if (ring->type == TYPE_EVENT) {
if (!last_trb_on_seg(ring->deq_seg, ring->dequeue)) {
/* All other rings have link trbs */
if (!trb_is_link(ring->dequeue)) {
- ring->dequeue++;
- ring->num_trbs_free++;
+ if (last_trb_on_seg(ring->deq_seg, ring->dequeue)) {
+ xhci_warn(xhci, "Missing link TRB at end of segment\n");
+ } else {
+ ring->dequeue++;
+ ring->num_trbs_free++;
+ }
}
+
while (trb_is_link(ring->dequeue)) {
ring->deq_seg = ring->deq_seg->next;
ring->dequeue = ring->deq_seg->trbs;
- }
+ if (link_trb_count++ > ring->num_segs) {
+ xhci_warn(xhci, "Ring is an endless link TRB loop\n");
+ break;
+ }
+ }
out:
trace_xhci_inc_deq(ring);
/*
* See Cycle bit rules. SW is the consumer for the event ring only.
- * Don't make a ring full of link TRBs. That would be dumb and this would loop.
*
* If we've just enqueued a TRB that is in the middle of a TD (meaning the
* chain bit is set), then set the chain bit in all the following link TRBs.
{
u32 chain;
union xhci_trb *next;
+ unsigned int link_trb_count = 0;
chain = le32_to_cpu(ring->enqueue->generic.field[3]) & TRB_CHAIN;
/* If this is not event ring, there is one less usable TRB */
if (!trb_is_link(ring->enqueue))
ring->num_trbs_free--;
+
+ if (last_trb_on_seg(ring->enq_seg, ring->enqueue)) {
+ xhci_err(xhci, "Tried to move enqueue past ring segment\n");
+ return;
+ }
+
next = ++(ring->enqueue);
/* Update the dequeue pointer further if that was a link TRB */
ring->enq_seg = ring->enq_seg->next;
ring->enqueue = ring->enq_seg->trbs;
next = ring->enqueue;
+
+ if (link_trb_count++ > ring->num_segs) {
+ xhci_warn(xhci, "%s: Ring link TRB loop\n", __func__);
+ break;
+ }
}
trace_xhci_inc_enq(ring);
trace_xhci_ring_ep_doorbell(slot_id, DB_VALUE(ep_index, stream_id));
writel(DB_VALUE(ep_index, stream_id), db_addr);
- /* The CPU has better things to do at this point than wait for a
- * write-posting flush. It'll get there soon enough.
- */
+ /* flush the write */
+ readl(db_addr);
}
/* Ring the doorbell for any rings with pending URBs */
ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
}
+static struct xhci_virt_ep *xhci_get_virt_ep(struct xhci_hcd *xhci,
+ unsigned int slot_id,
+ unsigned int ep_index)
+{
+ if (slot_id == 0 || slot_id >= MAX_HC_SLOTS) {
+ xhci_warn(xhci, "Invalid slot_id %u\n", slot_id);
+ return NULL;
+ }
+ if (ep_index >= EP_CTX_PER_DEV) {
+ xhci_warn(xhci, "Invalid endpoint index %u\n", ep_index);
+ return NULL;
+ }
+ if (!xhci->devs[slot_id]) {
+ xhci_warn(xhci, "No xhci virt device for slot_id %u\n", slot_id);
+ return NULL;
+ }
+
+ return &xhci->devs[slot_id]->eps[ep_index];
+}
+
+static struct xhci_ring *xhci_virt_ep_to_ring(struct xhci_hcd *xhci,
+ struct xhci_virt_ep *ep,
+ unsigned int stream_id)
+{
+ /* common case, no streams */
+ if (!(ep->ep_state & EP_HAS_STREAMS))
+ return ep->ring;
+
+ if (!ep->stream_info)
+ return NULL;
+
+ if (stream_id == 0 || stream_id >= ep->stream_info->num_streams) {
+ xhci_warn(xhci, "Invalid stream_id %u request for slot_id %u ep_index %u\n",
+ stream_id, ep->vdev->slot_id, ep->ep_index);
+ return NULL;
+ }
+
+ return ep->stream_info->stream_rings[stream_id];
+}
+
/* Get the right ring for the given slot_id, ep_index and stream_id.
* If the endpoint supports streams, boundary check the URB's stream ID.
* If the endpoint doesn't support streams, return the singular endpoint ring.
{
struct xhci_virt_ep *ep;
- ep = &xhci->devs[slot_id]->eps[ep_index];
- /* Common case: no streams */
- if (!(ep->ep_state & EP_HAS_STREAMS))
- return ep->ring;
-
- if (stream_id == 0) {
- xhci_warn(xhci,
- "WARN: Slot ID %u, ep index %u has streams, "
- "but URB has no stream ID.\n",
- slot_id, ep_index);
+ ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
+ if (!ep)
return NULL;
- }
- if (stream_id < ep->stream_info->num_streams)
- return ep->stream_info->stream_rings[stream_id];
-
- xhci_warn(xhci,
- "WARN: Slot ID %u, ep index %u has "
- "stream IDs 1 to %u allocated, "
- "but stream ID %u is requested.\n",
- slot_id, ep_index,
- ep->stream_info->num_streams - 1,
- stream_id);
- return NULL;
+ return xhci_virt_ep_to_ring(xhci, ep, stream_id);
}
return le64_to_cpu(ep_ctx->deq);
}
-/*
- * Move the xHC's endpoint ring dequeue pointer past cur_td.
- * Record the new state of the xHC's endpoint ring dequeue segment,
- * dequeue pointer, stream id, and new consumer cycle state in state.
- * Update our internal representation of the ring's dequeue pointer.
- *
- * We do this in three jumps:
- * - First we update our new ring state to be the same as when the xHC stopped.
- * - Then we traverse the ring to find the segment that contains
- * the last TRB in the TD. We toggle the xHC's new cycle state when we pass
- * any link TRBs with the toggle cycle bit set.
- * - Finally we move the dequeue state one TRB further, toggling the cycle bit
- * if we've moved it past a link TRB with the toggle cycle bit set.
- *
- * Some of the uses of xhci_generic_trb are grotty, but if they're done
- * with correct __le32 accesses they should work fine. Only users of this are
- * in here.
- */
-void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
- unsigned int slot_id, unsigned int ep_index,
- unsigned int stream_id, struct xhci_td *cur_td,
- struct xhci_dequeue_state *state)
+static int xhci_move_dequeue_past_td(struct xhci_hcd *xhci,
+ unsigned int slot_id, unsigned int ep_index,
+ unsigned int stream_id, struct xhci_td *td)
{
struct xhci_virt_device *dev = xhci->devs[slot_id];
struct xhci_virt_ep *ep = &dev->eps[ep_index];
struct xhci_ring *ep_ring;
+ struct xhci_command *cmd;
struct xhci_segment *new_seg;
union xhci_trb *new_deq;
+ int new_cycle;
dma_addr_t addr;
u64 hw_dequeue;
bool cycle_found = false;
bool td_last_trb_found = false;
+ u32 trb_sct = 0;
+ int ret;
ep_ring = xhci_triad_to_transfer_ring(xhci, slot_id,
ep_index, stream_id);
if (!ep_ring) {
- xhci_warn(xhci, "WARN can't find new dequeue state "
- "for invalid stream ID %u.\n",
- stream_id);
- return;
+ xhci_warn(xhci, "WARN can't find new dequeue, invalid stream ID %u\n",
+ stream_id);
+ return -ENODEV;
}
/*
* A cancelled TD can complete with a stall if HW cached the trb.
- * In this case driver can't find cur_td, but if the ring is empty we
+ * In this case driver can't find td, but if the ring is empty we
* can move the dequeue pointer to the current enqueue position.
+ * We shouldn't hit this anymore as cached cancelled TRBs are given back
+ * after clearing the cache, but be on the safe side and keep it anyway
*/
- if (!cur_td) {
+ if (!td) {
if (list_empty(&ep_ring->td_list)) {
- state->new_deq_seg = ep_ring->enq_seg;
- state->new_deq_ptr = ep_ring->enqueue;
- state->new_cycle_state = ep_ring->cycle_state;
- goto done;
+ new_seg = ep_ring->enq_seg;
+ new_deq = ep_ring->enqueue;
+ new_cycle = ep_ring->cycle_state;
+ xhci_dbg(xhci, "ep ring empty, Set new dequeue = enqueue");
+ goto deq_found;
} else {
- xhci_warn(xhci, "Can't find new dequeue state, missing cur_td\n");
- return;
+ xhci_warn(xhci, "Can't find new dequeue state, missing td\n");
+ return -EINVAL;
}
}
- /* Dig out the cycle state saved by the xHC during the stop ep cmd */
- xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
- "Finding endpoint context");
-
hw_dequeue = xhci_get_hw_deq(xhci, dev, ep_index, stream_id);
new_seg = ep_ring->deq_seg;
new_deq = ep_ring->dequeue;
- state->new_cycle_state = hw_dequeue & 0x1;
- state->stream_id = stream_id;
+ new_cycle = hw_dequeue & 0x1;
/*
* We want to find the pointer, segment and cycle state of the new trb
if (td_last_trb_found)
break;
}
- if (new_deq == cur_td->last_trb)
+ if (new_deq == td->last_trb)
td_last_trb_found = true;
if (cycle_found && trb_is_link(new_deq) &&
link_trb_toggles_cycle(new_deq))
- state->new_cycle_state ^= 0x1;
+ new_cycle ^= 0x1;
next_trb(xhci, ep_ring, &new_seg, &new_deq);
/* Search wrapped around, bail out */
if (new_deq == ep->ring->dequeue) {
xhci_err(xhci, "Error: Failed finding new dequeue state\n");
- state->new_deq_seg = NULL;
- state->new_deq_ptr = NULL;
- return;
+ return -EINVAL;
}
} while (!cycle_found || !td_last_trb_found);
- state->new_deq_seg = new_seg;
- state->new_deq_ptr = new_deq;
+deq_found:
-done:
/* Don't update the ring cycle state for the producer (us). */
- xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
- "Cycle state = 0x%x", state->new_cycle_state);
+ addr = xhci_trb_virt_to_dma(new_seg, new_deq);
+ if (addr == 0) {
+ xhci_warn(xhci, "Can't find dma of new dequeue ptr\n");
+ xhci_warn(xhci, "deq seg = %p, deq ptr = %p\n", new_seg, new_deq);
+ return -EINVAL;
+ }
+
+ if ((ep->ep_state & SET_DEQ_PENDING)) {
+ xhci_warn(xhci, "Set TR Deq already pending, don't submit for 0x%pad\n",
+ &addr);
+ return -EBUSY;
+ }
+
+ /* This function gets called from contexts where it cannot sleep */
+ cmd = xhci_alloc_command(xhci, false, GFP_ATOMIC);
+ if (!cmd) {
+ xhci_warn(xhci, "Can't alloc Set TR Deq cmd 0x%pad\n", &addr);
+ return -ENOMEM;
+ }
+
+ if (stream_id)
+ trb_sct = SCT_FOR_TRB(SCT_PRI_TR);
+ ret = queue_command(xhci, cmd,
+ lower_32_bits(addr) | trb_sct | new_cycle,
+ upper_32_bits(addr),
+ STREAM_ID_FOR_TRB(stream_id), SLOT_ID_FOR_TRB(slot_id) |
+ EP_ID_FOR_TRB(ep_index) | TRB_TYPE(TRB_SET_DEQ), false);
+ if (ret < 0) {
+ xhci_free_command(xhci, cmd);
+ return ret;
+ }
+ ep->queued_deq_seg = new_seg;
+ ep->queued_deq_ptr = new_deq;
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
- "New dequeue segment = %p (virtual)",
- state->new_deq_seg);
- addr = xhci_trb_virt_to_dma(state->new_deq_seg, state->new_deq_ptr);
- xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
- "New dequeue pointer = 0x%llx (DMA)",
- (unsigned long long) addr);
+ "Set TR Deq ptr 0x%llx, cycle %u\n", addr, new_cycle);
+
+ /* Stop the TD queueing code from ringing the doorbell until
+ * this command completes. The HC won't set the dequeue pointer
+ * if the ring is running, and ringing the doorbell starts the
+ * ring running.
+ */
+ ep->ep_state |= SET_DEQ_PENDING;
+ xhci_ring_cmd_db(xhci);
+ return 0;
}
/* flip_cycle means flip the cycle bit of all but the first and last TRB.
seg->bounce_offs = 0;
}
-/*
- * When we get a command completion for a Stop Endpoint Command, we need to
- * unlink any cancelled TDs from the ring. There are two ways to do that:
- *
- * 1. If the HW was in the middle of processing the TD that needs to be
- * cancelled, then we must move the ring's dequeue pointer past the last TRB
- * in the TD with a Set Dequeue Pointer Command.
- * 2. Otherwise, we turn all the TRBs in the TD into No-op TRBs (with the chain
- * bit cleared) so that the HW will skip over them.
- */
-static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
- union xhci_trb *trb, struct xhci_event_cmd *event)
+static int xhci_td_cleanup(struct xhci_hcd *xhci, struct xhci_td *td,
+ struct xhci_ring *ep_ring, int status)
{
- unsigned int ep_index;
- struct xhci_ring *ep_ring;
- struct xhci_virt_ep *ep;
- struct xhci_td *cur_td = NULL;
- struct xhci_td *last_unlinked_td;
- struct xhci_ep_ctx *ep_ctx;
- struct xhci_virt_device *vdev;
- u64 hw_deq;
- struct xhci_dequeue_state deq_state;
+ struct urb *urb = NULL;
- if (unlikely(TRB_TO_SUSPEND_PORT(le32_to_cpu(trb->generic.field[3])))) {
- if (!xhci->devs[slot_id])
- xhci_warn(xhci, "Stop endpoint command "
- "completion for disabled slot %u\n",
- slot_id);
- return;
+ /* Clean up the endpoint's TD list */
+ urb = td->urb;
+
+ /* if a bounce buffer was used to align this td then unmap it */
+ xhci_unmap_td_bounce_buffer(xhci, ep_ring, td);
+
+ /* Do one last check of the actual transfer length.
+ * If the host controller said we transferred more data than the buffer
+ * length, urb->actual_length will be a very big number (since it's
+ * unsigned). Play it safe and say we didn't transfer anything.
+ */
+ if (urb->actual_length > urb->transfer_buffer_length) {
+ xhci_warn(xhci, "URB req %u and actual %u transfer length mismatch\n",
+ urb->transfer_buffer_length, urb->actual_length);
+ urb->actual_length = 0;
+ status = 0;
}
+ /* TD might be removed from td_list if we are giving back a cancelled URB */
+ if (!list_empty(&td->td_list))
+ list_del_init(&td->td_list);
+ /* Giving back a cancelled URB, or if a slated TD completed anyway */
+ if (!list_empty(&td->cancelled_td_list))
+ list_del_init(&td->cancelled_td_list);
- memset(&deq_state, 0, sizeof(deq_state));
- ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
+ inc_td_cnt(urb);
+ /* Giveback the urb when all the tds are completed */
+ if (last_td_in_urb(td)) {
+ if ((urb->actual_length != urb->transfer_buffer_length &&
+ (urb->transfer_flags & URB_SHORT_NOT_OK)) ||
+ (status != 0 && !usb_endpoint_xfer_isoc(&urb->ep->desc)))
+ xhci_dbg(xhci, "Giveback URB %p, len = %d, expected = %d, status = %d\n",
+ urb, urb->actual_length,
+ urb->transfer_buffer_length, status);
- vdev = xhci->devs[slot_id];
- ep_ctx = xhci_get_ep_ctx(xhci, vdev->out_ctx, ep_index);
- trace_xhci_handle_cmd_stop_ep(ep_ctx);
+ /* set isoc urb status to 0 just as EHCI, UHCI, and OHCI */
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
+ status = 0;
+ xhci_giveback_urb_in_irq(xhci, td, status);
+ }
- ep = &xhci->devs[slot_id]->eps[ep_index];
- last_unlinked_td = list_last_entry(&ep->cancelled_td_list,
- struct xhci_td, cancelled_td_list);
+ return 0;
+}
- if (list_empty(&ep->cancelled_td_list)) {
- xhci_stop_watchdog_timer_in_irq(xhci, ep);
- ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
- return;
+
+/* Complete the cancelled URBs we unlinked from td_list. */
+static void xhci_giveback_invalidated_tds(struct xhci_virt_ep *ep)
+{
+ struct xhci_ring *ring;
+ struct xhci_td *td, *tmp_td;
+
+ list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list,
+ cancelled_td_list) {
+
+ /*
+ * Doesn't matter what we pass for status, since the core will
+ * just overwrite it (because the URB has been unlinked).
+ */
+ ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
+
+ if (td->cancel_status == TD_CLEARED)
+ xhci_td_cleanup(ep->xhci, td, ring, 0);
+
+ if (ep->xhci->xhc_state & XHCI_STATE_DYING)
+ return;
+ }
+}
+
+static int xhci_reset_halted_ep(struct xhci_hcd *xhci, unsigned int slot_id,
+ unsigned int ep_index, enum xhci_ep_reset_type reset_type)
+{
+ struct xhci_command *command;
+ int ret = 0;
+
+ command = xhci_alloc_command(xhci, false, GFP_ATOMIC);
+ if (!command) {
+ ret = -ENOMEM;
+ goto done;
}
- /* Fix up the ep ring first, so HW stops executing cancelled TDs.
- * We have the xHCI lock, so nothing can modify this list until we drop
- * it. We're also in the event handler, so we can't get re-interrupted
- * if another Stop Endpoint command completes
+ ret = xhci_queue_reset_ep(xhci, command, slot_id, ep_index, reset_type);
+done:
+ if (ret)
+ xhci_err(xhci, "ERROR queuing reset endpoint for slot %d ep_index %d, %d\n",
+ slot_id, ep_index, ret);
+ return ret;
+}
+
+static void xhci_handle_halted_endpoint(struct xhci_hcd *xhci,
+ struct xhci_virt_ep *ep, unsigned int stream_id,
+ struct xhci_td *td,
+ enum xhci_ep_reset_type reset_type)
+{
+ unsigned int slot_id = ep->vdev->slot_id;
+ int err;
+
+ /*
+ * Avoid resetting endpoint if link is inactive. Can cause host hang.
+ * Device will be reset soon to recover the link so don't do anything
*/
- list_for_each_entry(cur_td, &ep->cancelled_td_list, cancelled_td_list) {
+ if (ep->vdev->flags & VDEV_PORT_ERROR)
+ return;
+
+ /* add td to cancelled list and let reset ep handler take care of it */
+ if (reset_type == EP_HARD_RESET) {
+ ep->ep_state |= EP_HARD_CLEAR_TOGGLE;
+ if (td && list_empty(&td->cancelled_td_list)) {
+ list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list);
+ td->cancel_status = TD_HALTED;
+ }
+ }
+
+ if (ep->ep_state & EP_HALTED) {
+ xhci_dbg(xhci, "Reset ep command already pending\n");
+ return;
+ }
+
+ err = xhci_reset_halted_ep(xhci, slot_id, ep->ep_index, reset_type);
+ if (err)
+ return;
+
+ ep->ep_state |= EP_HALTED;
+
+ xhci_ring_cmd_db(xhci);
+}
+
+/*
+ * Fix up the ep ring first, so HW stops executing cancelled TDs.
+ * We have the xHCI lock, so nothing can modify this list until we drop it.
+ * We're also in the event handler, so we can't get re-interrupted if another
+ * Stop Endpoint command completes.
+ *
+ * only call this when ring is not in a running state
+ */
+
+static int xhci_invalidate_cancelled_tds(struct xhci_virt_ep *ep)
+{
+ struct xhci_hcd *xhci;
+ struct xhci_td *td = NULL;
+ struct xhci_td *tmp_td = NULL;
+ struct xhci_td *cached_td = NULL;
+ struct xhci_ring *ring;
+ u64 hw_deq;
+ unsigned int slot_id = ep->vdev->slot_id;
+ int err;
+
+ xhci = ep->xhci;
+
+ list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list, cancelled_td_list) {
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Removing canceled TD starting at 0x%llx (dma).",
(unsigned long long)xhci_trb_virt_to_dma(
- cur_td->start_seg, cur_td->first_trb));
- ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb);
- if (!ep_ring) {
- /* This shouldn't happen unless a driver is mucking
- * with the stream ID after submission. This will
- * leave the TD on the hardware ring, and the hardware
- * will try to execute it, and may access a buffer
- * that has already been freed. In the best case, the
- * hardware will execute it, and the event handler will
- * ignore the completion event for that TD, since it was
- * removed from the td_list for that endpoint. In
- * short, don't muck with the stream ID after
- * submission.
- */
- xhci_warn(xhci, "WARN Cancelled URB %p "
- "has invalid stream ID %u.\n",
- cur_td->urb,
- cur_td->urb->stream_id);
- goto remove_finished_td;
+ td->start_seg, td->first_trb));
+ list_del_init(&td->td_list);
+ ring = xhci_urb_to_transfer_ring(xhci, td->urb);
+ if (!ring) {
+ xhci_warn(xhci, "WARN Cancelled URB %p has invalid stream ID %u.\n",
+ td->urb, td->urb->stream_id);
+ continue;
}
/*
- * If we stopped on the TD we need to cancel, then we have to
+ * If ring stopped on the TD we need to cancel, then we have to
* move the xHC endpoint ring dequeue pointer past this TD.
*/
- hw_deq = xhci_get_hw_deq(xhci, vdev, ep_index,
- cur_td->urb->stream_id);
+ hw_deq = xhci_get_hw_deq(xhci, ep->vdev, ep->ep_index,
+ td->urb->stream_id);
hw_deq &= ~0xf;
- if (trb_in_td(xhci, cur_td->start_seg, cur_td->first_trb,
- cur_td->last_trb, hw_deq, false)) {
- xhci_find_new_dequeue_state(xhci, slot_id, ep_index,
- cur_td->urb->stream_id,
- cur_td, &deq_state);
+ if (trb_in_td(xhci, td->start_seg, td->first_trb,
+ td->last_trb, hw_deq, false)) {
+ switch (td->cancel_status) {
+ case TD_CLEARED: /* TD is already no-op */
+ case TD_CLEARING_CACHE: /* set TR deq command already queued */
+ break;
+ case TD_DIRTY: /* TD is cached, clear it */
+ case TD_HALTED:
+ /* FIXME stream case, several stopped rings */
+ cached_td = td;
+ break;
+ }
} else {
- td_to_noop(xhci, ep_ring, cur_td, false);
+ td_to_noop(xhci, ring, td, false);
+ td->cancel_status = TD_CLEARED;
}
+ }
+ if (cached_td) {
+ cached_td->cancel_status = TD_CLEARING_CACHE;
+
+ err = xhci_move_dequeue_past_td(xhci, slot_id, ep->ep_index,
+ cached_td->urb->stream_id,
+ cached_td);
+ /* Failed to move past cached td, try just setting it noop */
+ if (err) {
+ td_to_noop(xhci, ring, cached_td, false);
+ cached_td->cancel_status = TD_CLEARED;
+ }
+ cached_td = NULL;
+ }
+ return 0;
+}
-remove_finished_td:
- /*
- * The event handler won't see a completion for this TD anymore,
- * so remove it from the endpoint ring's TD list. Keep it in
- * the cancelled TD list for URB completion later.
- */
- list_del_init(&cur_td->td_list);
+/*
+ * Returns the TD the endpoint ring halted on.
+ * Only call for non-running rings without streams.
+ */
+static struct xhci_td *find_halted_td(struct xhci_virt_ep *ep)
+{
+ struct xhci_td *td;
+ u64 hw_deq;
+
+ if (!list_empty(&ep->ring->td_list)) { /* Not streams compatible */
+ hw_deq = xhci_get_hw_deq(ep->xhci, ep->vdev, ep->ep_index, 0);
+ hw_deq &= ~0xf;
+ td = list_first_entry(&ep->ring->td_list, struct xhci_td, td_list);
+ if (trb_in_td(ep->xhci, td->start_seg, td->first_trb,
+ td->last_trb, hw_deq, false))
+ return td;
}
+ return NULL;
+}
- xhci_stop_watchdog_timer_in_irq(xhci, ep);
+/*
+ * When we get a command completion for a Stop Endpoint Command, we need to
+ * unlink any cancelled TDs from the ring. There are two ways to do that:
+ *
+ * 1. If the HW was in the middle of processing the TD that needs to be
+ * cancelled, then we must move the ring's dequeue pointer past the last TRB
+ * in the TD with a Set Dequeue Pointer Command.
+ * 2. Otherwise, we turn all the TRBs in the TD into No-op TRBs (with the chain
+ * bit cleared) so that the HW will skip over them.
+ */
+static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
+ union xhci_trb *trb, u32 comp_code)
+{
+ unsigned int ep_index;
+ struct xhci_virt_ep *ep;
+ struct xhci_ep_ctx *ep_ctx;
+ struct xhci_td *td = NULL;
+ enum xhci_ep_reset_type reset_type;
+ struct xhci_command *command;
- /* If necessary, queue a Set Transfer Ring Dequeue Pointer command */
- if (deq_state.new_deq_ptr && deq_state.new_deq_seg) {
- xhci_queue_new_dequeue_state(xhci, slot_id, ep_index,
- &deq_state);
- xhci_ring_cmd_db(xhci);
- } else {
- /* Otherwise ring the doorbell(s) to restart queued transfers */
- ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
+ if (unlikely(TRB_TO_SUSPEND_PORT(le32_to_cpu(trb->generic.field[3])))) {
+ if (!xhci->devs[slot_id])
+ xhci_warn(xhci, "Stop endpoint command completion for disabled slot %u\n",
+ slot_id);
+ return;
}
+ ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
+ ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
+ if (!ep)
+ return;
+
+ ep_ctx = xhci_get_ep_ctx(xhci, ep->vdev->out_ctx, ep_index);
+
+ trace_xhci_handle_cmd_stop_ep(ep_ctx);
+
+ if (comp_code == COMP_CONTEXT_STATE_ERROR) {
/*
- * Drop the lock and complete the URBs in the cancelled TD list.
- * New TDs to be cancelled might be added to the end of the list before
- * we can complete all the URBs for the TDs we already unlinked.
- * So stop when we've completed the URB for the last TD we unlinked.
+ * If stop endpoint command raced with a halting endpoint we need to
+ * reset the host side endpoint first.
+ * If the TD we halted on isn't cancelled the TD should be given back
+ * with a proper error code, and the ring dequeue moved past the TD.
+ * If streams case we can't find hw_deq, or the TD we halted on so do a
+ * soft reset.
+ *
+ * Proper error code is unknown here, it would be -EPIPE if device side
+ * of enadpoit halted (aka STALL), and -EPROTO if not (transaction error)
+ * We use -EPROTO, if device is stalled it should return a stall error on
+ * next transfer, which then will return -EPIPE, and device side stall is
+ * noted and cleared by class driver.
*/
- do {
- cur_td = list_first_entry(&ep->cancelled_td_list,
- struct xhci_td, cancelled_td_list);
- list_del_init(&cur_td->cancelled_td_list);
+ switch (GET_EP_CTX_STATE(ep_ctx)) {
+ case EP_STATE_HALTED:
+ xhci_dbg(xhci, "Stop ep completion raced with stall, reset ep\n");
+ if (ep->ep_state & EP_HAS_STREAMS) {
+ reset_type = EP_SOFT_RESET;
+ } else {
+ reset_type = EP_HARD_RESET;
+ td = find_halted_td(ep);
+ if (td)
+ td->status = -EPROTO;
+ }
+ /* reset ep, reset handler cleans up cancelled tds */
+ xhci_handle_halted_endpoint(xhci, ep, 0, td, reset_type);
+ xhci_stop_watchdog_timer_in_irq(xhci, ep);
+ return;
+ case EP_STATE_RUNNING:
+ /* Race, HW handled stop ep cmd before ep was running */
+ command = xhci_alloc_command(xhci, false, GFP_ATOMIC);
+ if (!command)
+ xhci_stop_watchdog_timer_in_irq(xhci, ep);
- /* Clean up the cancelled URB */
- /* Doesn't matter what we pass for status, since the core will
- * just overwrite it (because the URB has been unlinked).
- */
- ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb);
- xhci_unmap_td_bounce_buffer(xhci, ep_ring, cur_td);
- inc_td_cnt(cur_td->urb);
- if (last_td_in_urb(cur_td))
- xhci_giveback_urb_in_irq(xhci, cur_td, 0);
+ mod_timer(&ep->stop_cmd_timer,
+ jiffies + XHCI_STOP_EP_CMD_TIMEOUT * HZ);
+ xhci_queue_stop_endpoint(xhci, command, slot_id, ep_index, 0);
+ xhci_ring_cmd_db(xhci);
- /* Stop processing the cancelled list if the watchdog timer is
- * running.
- */
- if (xhci->xhc_state & XHCI_STATE_DYING)
return;
- } while (cur_td != last_unlinked_td);
+ default:
+ break;
+ }
+ }
+ /* will queue a set TR deq if stopped on a cancelled, uncleared TD */
+ xhci_invalidate_cancelled_tds(ep);
+ xhci_stop_watchdog_timer_in_irq(xhci, ep);
- /* Return to the event handler with xhci->lock re-acquired */
+ /* Otherwise ring the doorbell(s) to restart queued transfers */
+ xhci_giveback_invalidated_tds(ep);
+ ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
}
static void xhci_kill_ring_urbs(struct xhci_hcd *xhci, struct xhci_ring *ring)
unsigned int ep_index;
unsigned int stream_id;
struct xhci_ring *ep_ring;
- struct xhci_virt_device *dev;
struct xhci_virt_ep *ep;
struct xhci_ep_ctx *ep_ctx;
struct xhci_slot_ctx *slot_ctx;
+ struct xhci_td *td, *tmp_td;
ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
stream_id = TRB_TO_STREAM_ID(le32_to_cpu(trb->generic.field[2]));
- dev = xhci->devs[slot_id];
- ep = &dev->eps[ep_index];
+ ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
+ if (!ep)
+ return;
- ep_ring = xhci_stream_id_to_ring(dev, ep_index, stream_id);
+ ep_ring = xhci_virt_ep_to_ring(xhci, ep, stream_id);
if (!ep_ring) {
xhci_warn(xhci, "WARN Set TR deq ptr command for freed stream ID %u\n",
stream_id);
goto cleanup;
}
- ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index);
- slot_ctx = xhci_get_slot_ctx(xhci, dev->out_ctx);
+ ep_ctx = xhci_get_ep_ctx(xhci, ep->vdev->out_ctx, ep_index);
+ slot_ctx = xhci_get_slot_ctx(xhci, ep->vdev->out_ctx);
trace_xhci_handle_cmd_set_deq(slot_ctx);
trace_xhci_handle_cmd_set_deq_ep(ep_ctx);
/* Update the ring's dequeue segment and dequeue pointer
* to reflect the new position.
*/
- update_ring_for_set_deq_completion(xhci, dev,
+ update_ring_for_set_deq_completion(xhci, ep->vdev,
ep_ring, ep_index);
} else {
xhci_warn(xhci, "Mismatch between completed Set TR Deq Ptr command & xHCI internal state.\n");
ep->queued_deq_seg, ep->queued_deq_ptr);
}
}
-
+ /* HW cached TDs cleared from cache, give them back */
+ list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list,
+ cancelled_td_list) {
+ ep_ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
+ if (td->cancel_status == TD_CLEARING_CACHE) {
+ td->cancel_status = TD_CLEARED;
+ xhci_td_cleanup(ep->xhci, td, ep_ring, td->status);
+ }
+ }
cleanup:
- dev->eps[ep_index].ep_state &= ~SET_DEQ_PENDING;
- dev->eps[ep_index].queued_deq_seg = NULL;
- dev->eps[ep_index].queued_deq_ptr = NULL;
+ ep->ep_state &= ~SET_DEQ_PENDING;
+ ep->queued_deq_seg = NULL;
+ ep->queued_deq_ptr = NULL;
/* Restart any rings with pending URBs */
ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
}
static void xhci_handle_cmd_reset_ep(struct xhci_hcd *xhci, int slot_id,
union xhci_trb *trb, u32 cmd_comp_code)
{
- struct xhci_virt_device *vdev;
+ struct xhci_virt_ep *ep;
struct xhci_ep_ctx *ep_ctx;
unsigned int ep_index;
ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3]));
- vdev = xhci->devs[slot_id];
- ep_ctx = xhci_get_ep_ctx(xhci, vdev->out_ctx, ep_index);
+ ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
+ if (!ep)
+ return;
+
+ ep_ctx = xhci_get_ep_ctx(xhci, ep->vdev->out_ctx, ep_index);
trace_xhci_handle_cmd_reset_ep(ep_ctx);
/* This command will only fail if the endpoint wasn't halted,
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Ignoring reset ep completion code of %u", cmd_comp_code);
- /* HW with the reset endpoint quirk needs to have a configure endpoint
- * command complete before the endpoint can be used. Queue that here
- * because the HW can't handle two commands being queued in a row.
- */
- if (xhci->quirks & XHCI_RESET_EP_QUIRK) {
- struct xhci_command *command;
+ /* Cleanup cancelled TDs as ep is stopped. May queue a Set TR Deq cmd */
+ xhci_invalidate_cancelled_tds(ep);
- command = xhci_alloc_command(xhci, false, GFP_ATOMIC);
- if (!command)
- return;
+ if (xhci->quirks & XHCI_RESET_EP_QUIRK)
+ xhci_dbg(xhci, "Note: Removed workaround to queue config ep for this hw");
+ /* Clear our internal halted state */
+ ep->ep_state &= ~EP_HALTED;
- xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
- "Queueing configure endpoint command");
- xhci_queue_configure_endpoint(xhci, command,
- xhci->devs[slot_id]->in_ctx->dma, slot_id,
- false);
- xhci_ring_cmd_db(xhci);
- } else {
- /* Clear our internal halted state */
- xhci->devs[slot_id]->eps[ep_index].ep_state &= ~EP_HALTED;
- }
+ xhci_giveback_invalidated_tds(ep);
/* if this was a soft reset, then restart */
if ((le32_to_cpu(trb->generic.field[3])) & TRB_TSP)
}
static void xhci_handle_cmd_config_ep(struct xhci_hcd *xhci, int slot_id,
- struct xhci_event_cmd *event, u32 cmd_comp_code)
+ u32 cmd_comp_code)
{
struct xhci_virt_device *virt_dev;
struct xhci_input_control_ctx *ctrl_ctx;
* is not waiting on the configure endpoint command.
*/
virt_dev = xhci->devs[slot_id];
+ if (!virt_dev)
+ return;
ctrl_ctx = xhci_get_input_control_ctx(virt_dev->in_ctx);
if (!ctrl_ctx) {
xhci_warn(xhci, "Could not get input context, bad type.\n");
struct xhci_slot_ctx *slot_ctx;
vdev = xhci->devs[slot_id];
+ if (!vdev)
+ return;
slot_ctx = xhci_get_slot_ctx(xhci, vdev->out_ctx);
trace_xhci_handle_cmd_addr_dev(slot_ctx);
}
-static void xhci_handle_cmd_reset_dev(struct xhci_hcd *xhci, int slot_id,
- struct xhci_event_cmd *event)
+static void xhci_handle_cmd_reset_dev(struct xhci_hcd *xhci, int slot_id)
{
struct xhci_virt_device *vdev;
struct xhci_slot_ctx *slot_ctx;
vdev = xhci->devs[slot_id];
+ if (!vdev) {
+ xhci_warn(xhci, "Reset device command completion for disabled slot %u\n",
+ slot_id);
+ return;
+ }
slot_ctx = xhci_get_slot_ctx(xhci, vdev->out_ctx);
trace_xhci_handle_cmd_reset_dev(slot_ctx);
xhci_dbg(xhci, "Completed reset device command.\n");
- if (!xhci->devs[slot_id])
- xhci_warn(xhci, "Reset device command completion "
- "for disabled slot %u\n", slot_id);
}
static void xhci_handle_cmd_nec_get_fw(struct xhci_hcd *xhci,
static void handle_cmd_completion(struct xhci_hcd *xhci,
struct xhci_event_cmd *event)
{
- int slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags));
+ unsigned int slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags));
u64 cmd_dma;
dma_addr_t cmd_dequeue_dma;
u32 cmd_comp_code;
struct xhci_command *cmd;
u32 cmd_type;
+ if (slot_id >= MAX_HC_SLOTS) {
+ xhci_warn(xhci, "Invalid slot_id %u\n", slot_id);
+ return;
+ }
+
cmd_dma = le64_to_cpu(event->cmd_trb);
cmd_trb = xhci->cmd_ring->dequeue;
break;
case TRB_CONFIG_EP:
if (!cmd->completion)
- xhci_handle_cmd_config_ep(xhci, slot_id, event,
- cmd_comp_code);
+ xhci_handle_cmd_config_ep(xhci, slot_id, cmd_comp_code);
break;
case TRB_EVAL_CONTEXT:
break;
WARN_ON(slot_id != TRB_TO_SLOT_ID(
le32_to_cpu(cmd_trb->generic.field[3])));
if (!cmd->completion)
- xhci_handle_cmd_stop_ep(xhci, slot_id, cmd_trb, event);
+ xhci_handle_cmd_stop_ep(xhci, slot_id, cmd_trb,
+ cmd_comp_code);
break;
case TRB_SET_DEQ:
WARN_ON(slot_id != TRB_TO_SLOT_ID(
*/
slot_id = TRB_TO_SLOT_ID(
le32_to_cpu(cmd_trb->generic.field[3]));
- xhci_handle_cmd_reset_dev(xhci, slot_id, event);
+ xhci_handle_cmd_reset_dev(xhci, slot_id);
break;
case TRB_NEC_GET_FW:
xhci_handle_cmd_nec_get_fw(xhci, event);
}
static void handle_vendor_event(struct xhci_hcd *xhci,
- union xhci_trb *event)
+ union xhci_trb *event, u32 trb_type)
{
- u32 trb_type;
-
- trb_type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->generic.field[3]));
xhci_dbg(xhci, "Vendor specific event TRB type = %u\n", trb_type);
if (trb_type == TRB_NEC_CMD_COMP && (xhci->quirks & XHCI_NEC_HOST))
handle_cmd_completion(xhci, &event->event_cmd);
}
}
-static void xhci_cleanup_halted_endpoint(struct xhci_hcd *xhci,
- unsigned int slot_id, unsigned int ep_index,
- unsigned int stream_id, struct xhci_td *td,
- enum xhci_ep_reset_type reset_type)
-{
- struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index];
- struct xhci_command *command;
-
- /*
- * Avoid resetting endpoint if link is inactive. Can cause host hang.
- * Device will be reset soon to recover the link so don't do anything
- */
- if (xhci->devs[slot_id]->flags & VDEV_PORT_ERROR)
- return;
-
- command = xhci_alloc_command(xhci, false, GFP_ATOMIC);
- if (!command)
- return;
-
- ep->ep_state |= EP_HALTED;
-
- xhci_queue_reset_ep(xhci, command, slot_id, ep_index, reset_type);
-
- if (reset_type == EP_HARD_RESET) {
- ep->ep_state |= EP_HARD_CLEAR_TOGGLE;
- xhci_cleanup_stalled_ring(xhci, slot_id, ep_index, stream_id,
- td);
- }
- xhci_ring_cmd_db(xhci);
-}
-
/* Check if an error has halted the endpoint ring. The class driver will
* cleanup the halt for a non-default control endpoint if we indicate a stall.
* However, a babble and other errors also halt the endpoint ring, and the class
return 0;
}
-static int xhci_td_cleanup(struct xhci_hcd *xhci, struct xhci_td *td,
- struct xhci_ring *ep_ring, int *status)
-{
- struct urb *urb = NULL;
-
- /* Clean up the endpoint's TD list */
- urb = td->urb;
-
- /* if a bounce buffer was used to align this td then unmap it */
- xhci_unmap_td_bounce_buffer(xhci, ep_ring, td);
-
- /* Do one last check of the actual transfer length.
- * If the host controller said we transferred more data than the buffer
- * length, urb->actual_length will be a very big number (since it's
- * unsigned). Play it safe and say we didn't transfer anything.
- */
- if (urb->actual_length > urb->transfer_buffer_length) {
- xhci_warn(xhci, "URB req %u and actual %u transfer length mismatch\n",
- urb->transfer_buffer_length, urb->actual_length);
- urb->actual_length = 0;
- *status = 0;
- }
- list_del_init(&td->td_list);
- /* Was this TD slated to be cancelled but completed anyway? */
- if (!list_empty(&td->cancelled_td_list))
- list_del_init(&td->cancelled_td_list);
-
- inc_td_cnt(urb);
- /* Giveback the urb when all the tds are completed */
- if (last_td_in_urb(td)) {
- if ((urb->actual_length != urb->transfer_buffer_length &&
- (urb->transfer_flags & URB_SHORT_NOT_OK)) ||
- (*status != 0 && !usb_endpoint_xfer_isoc(&urb->ep->desc)))
- xhci_dbg(xhci, "Giveback URB %p, len = %d, expected = %d, status = %d\n",
- urb, urb->actual_length,
- urb->transfer_buffer_length, *status);
-
- /* set isoc urb status to 0 just as EHCI, UHCI, and OHCI */
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
- *status = 0;
- xhci_giveback_urb_in_irq(xhci, td, *status);
- }
-
- return 0;
-}
-
static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
- struct xhci_transfer_event *event,
- struct xhci_virt_ep *ep, int *status)
+ struct xhci_transfer_event *event, struct xhci_virt_ep *ep)
{
- struct xhci_virt_device *xdev;
struct xhci_ep_ctx *ep_ctx;
struct xhci_ring *ep_ring;
- unsigned int slot_id;
u32 trb_comp_code;
- int ep_index;
- slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags));
- xdev = xhci->devs[slot_id];
- ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1;
ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer));
- ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index);
+ ep_ctx = xhci_get_ep_ctx(xhci, ep->vdev->out_ctx, ep->ep_index);
trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
- if (trb_comp_code == COMP_STOPPED_LENGTH_INVALID ||
- trb_comp_code == COMP_STOPPED ||
- trb_comp_code == COMP_STOPPED_SHORT_PACKET) {
- /* The Endpoint Stop Command completion will take care of any
- * stopped TDs. A stopped TD may be restarted, so don't update
+ switch (trb_comp_code) {
+ case COMP_STOPPED_LENGTH_INVALID:
+ case COMP_STOPPED_SHORT_PACKET:
+ case COMP_STOPPED:
+ /*
+ * The "Stop Endpoint" completion will take care of any
+ * stopped TDs. A stopped TD may be restarted, so don't update
* the ring dequeue pointer or take this TD off any lists yet.
*/
return 0;
- }
- if (trb_comp_code == COMP_STALL_ERROR ||
- xhci_requires_manual_halt_cleanup(xhci, ep_ctx,
- trb_comp_code)) {
+ case COMP_USB_TRANSACTION_ERROR:
+ case COMP_BABBLE_DETECTED_ERROR:
+ case COMP_SPLIT_TRANSACTION_ERROR:
+ /*
+ * If endpoint context state is not halted we might be
+ * racing with a reset endpoint command issued by a unsuccessful
+ * stop endpoint completion (context error). In that case the
+ * td should be on the cancelled list, and EP_HALTED flag set.
+ *
+ * Or then it's not halted due to the 0.95 spec stating that a
+ * babbling control endpoint should not halt. The 0.96 spec
+ * again says it should. Some HW claims to be 0.95 compliant,
+ * but it halts the control endpoint anyway.
+ */
+ if (GET_EP_CTX_STATE(ep_ctx) != EP_STATE_HALTED) {
+ /*
+ * If EP_HALTED is set and TD is on the cancelled list
+ * the TD and dequeue pointer will be handled by reset
+ * ep command completion
+ */
+ if ((ep->ep_state & EP_HALTED) &&
+ !list_empty(&td->cancelled_td_list)) {
+ xhci_dbg(xhci, "Already resolving halted ep for 0x%llx\n",
+ (unsigned long long)xhci_trb_virt_to_dma(
+ td->start_seg, td->first_trb));
+ return 0;
+ }
+ /* endpoint not halted, don't reset it */
+ break;
+ }
+ /* Almost same procedure as for STALL_ERROR below */
+ xhci_clear_hub_tt_buffer(xhci, td, ep);
+ xhci_handle_halted_endpoint(xhci, ep, ep_ring->stream_id, td,
+ EP_HARD_RESET);
+ return 0;
+ case COMP_STALL_ERROR:
/*
* xhci internal endpoint state will go to a "halt" state for
* any stall, including default control pipe protocol stall.
* stall later. Hub TT buffer should only be cleared for FS/LS
* devices behind HS hubs for functional stalls.
*/
- if ((ep_index != 0) || (trb_comp_code != COMP_STALL_ERROR))
+ if (ep->ep_index != 0)
xhci_clear_hub_tt_buffer(xhci, td, ep);
- xhci_cleanup_halted_endpoint(xhci, slot_id, ep_index,
- ep_ring->stream_id, td, EP_HARD_RESET);
- } else {
- /* Update ring dequeue pointer */
- while (ep_ring->dequeue != td->last_trb)
- inc_deq(xhci, ep_ring);
- inc_deq(xhci, ep_ring);
+
+ xhci_handle_halted_endpoint(xhci, ep, ep_ring->stream_id, td,
+ EP_HARD_RESET);
+
+ return 0; /* xhci_handle_halted_endpoint marked td cancelled */
+ default:
+ break;
}
- return xhci_td_cleanup(xhci, td, ep_ring, status);
+ /* Update ring dequeue pointer */
+ ep_ring->dequeue = td->last_trb;
+ ep_ring->deq_seg = td->last_trb_seg;
+ ep_ring->num_trbs_free += td->num_trbs - 1;
+ inc_deq(xhci, ep_ring);
+
+ return xhci_td_cleanup(xhci, td, ep_ring, td->status);
}
/* sum trb lengths from ring dequeue up to stop_trb, _excluding_ stop_trb */
*/
static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
union xhci_trb *ep_trb, struct xhci_transfer_event *event,
- struct xhci_virt_ep *ep, int *status)
+ struct xhci_virt_ep *ep)
{
- struct xhci_virt_device *xdev;
- unsigned int slot_id;
- int ep_index;
struct xhci_ep_ctx *ep_ctx;
u32 trb_comp_code;
u32 remaining, requested;
u32 trb_type;
trb_type = TRB_FIELD_TO_TYPE(le32_to_cpu(ep_trb->generic.field[3]));
- slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags));
- xdev = xhci->devs[slot_id];
- ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1;
- ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index);
+ ep_ctx = xhci_get_ep_ctx(xhci, ep->vdev->out_ctx, ep->ep_index);
trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
requested = td->urb->transfer_buffer_length;
remaining = EVENT_TRB_LEN(le32_to_cpu(event->transfer_len));
if (trb_type != TRB_STATUS) {
xhci_warn(xhci, "WARN: Success on ctrl %s TRB without IOC set?\n",
(trb_type == TRB_DATA) ? "data" : "setup");
- *status = -ESHUTDOWN;
+ td->status = -ESHUTDOWN;
break;
}
- *status = 0;
+ td->status = 0;
break;
case COMP_SHORT_PACKET:
- *status = 0;
+ td->status = 0;
break;
case COMP_STOPPED_SHORT_PACKET:
if (trb_type == TRB_DATA || trb_type == TRB_NORMAL)
ep_ctx, trb_comp_code))
break;
xhci_dbg(xhci, "TRB error %u, halted endpoint index = %u\n",
- trb_comp_code, ep_index);
+ trb_comp_code, ep->ep_index);
fallthrough;
case COMP_STALL_ERROR:
/* Did we transfer part of the data (middle) phase? */
td->urb->actual_length = requested;
finish_td:
- return finish_td(xhci, td, event, ep, status);
+ return finish_td(xhci, td, event, ep);
}
/*
*/
static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
union xhci_trb *ep_trb, struct xhci_transfer_event *event,
- struct xhci_virt_ep *ep, int *status)
+ struct xhci_virt_ep *ep)
{
- struct xhci_ring *ep_ring;
struct urb_priv *urb_priv;
int idx;
struct usb_iso_packet_descriptor *frame;
u32 remaining, requested, ep_trb_len;
int short_framestatus;
- ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer));
trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
urb_priv = td->urb->hcpriv;
idx = urb_priv->num_tds_done;
}
if (sum_trbs_for_length)
- frame->actual_length = sum_trb_lengths(xhci, ep_ring, ep_trb) +
+ frame->actual_length = sum_trb_lengths(xhci, ep->ring, ep_trb) +
ep_trb_len - remaining;
else
frame->actual_length = requested;
td->urb->actual_length += frame->actual_length;
- return finish_td(xhci, td, event, ep, status);
+ return finish_td(xhci, td, event, ep);
}
static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td,
- struct xhci_transfer_event *event,
- struct xhci_virt_ep *ep, int *status)
+ struct xhci_virt_ep *ep, int status)
{
- struct xhci_ring *ep_ring;
struct urb_priv *urb_priv;
struct usb_iso_packet_descriptor *frame;
int idx;
- ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer));
urb_priv = td->urb->hcpriv;
idx = urb_priv->num_tds_done;
frame = &td->urb->iso_frame_desc[idx];
frame->actual_length = 0;
/* Update ring dequeue pointer */
- while (ep_ring->dequeue != td->last_trb)
- inc_deq(xhci, ep_ring);
- inc_deq(xhci, ep_ring);
+ ep->ring->dequeue = td->last_trb;
+ ep->ring->deq_seg = td->last_trb_seg;
+ ep->ring->num_trbs_free += td->num_trbs - 1;
+ inc_deq(xhci, ep->ring);
- return xhci_td_cleanup(xhci, td, ep_ring, status);
+ return xhci_td_cleanup(xhci, td, ep->ring, status);
}
/*
*/
static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td,
union xhci_trb *ep_trb, struct xhci_transfer_event *event,
- struct xhci_virt_ep *ep, int *status)
+ struct xhci_virt_ep *ep)
{
struct xhci_slot_ctx *slot_ctx;
struct xhci_ring *ep_ring;
u32 trb_comp_code;
u32 remaining, requested, ep_trb_len;
- unsigned int slot_id;
- int ep_index;
- slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags));
- slot_ctx = xhci_get_slot_ctx(xhci, xhci->devs[slot_id]->out_ctx);
- ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1;
+ slot_ctx = xhci_get_slot_ctx(xhci, ep->vdev->out_ctx);
ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer));
trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
remaining = EVENT_TRB_LEN(le32_to_cpu(event->transfer_len));
td->urb->ep->desc.bEndpointAddress,
requested, remaining);
}
- *status = 0;
+ td->status = 0;
break;
case COMP_SHORT_PACKET:
xhci_dbg(xhci, "ep %#x - asked for %d bytes, %d bytes untransferred\n",
td->urb->ep->desc.bEndpointAddress,
requested, remaining);
- *status = 0;
+ td->status = 0;
break;
case COMP_STOPPED_SHORT_PACKET:
td->urb->actual_length = remaining;
if ((ep_ring->err_count++ > MAX_SOFT_RETRY) ||
le32_to_cpu(slot_ctx->tt_info) & TT_SLOT)
break;
- *status = 0;
- xhci_cleanup_halted_endpoint(xhci, slot_id, ep_index,
- ep_ring->stream_id, td, EP_SOFT_RESET);
+
+ td->status = 0;
+
+ xhci_handle_halted_endpoint(xhci, ep, ep_ring->stream_id, td,
+ EP_SOFT_RESET);
return 0;
default:
/* do nothing */
remaining);
td->urb->actual_length = 0;
}
- return finish_td(xhci, td, event, ep, status);
+ return finish_td(xhci, td, event, ep);
}
/*
static int handle_tx_event(struct xhci_hcd *xhci,
struct xhci_transfer_event *event)
{
- struct xhci_virt_device *xdev;
struct xhci_virt_ep *ep;
struct xhci_ring *ep_ring;
unsigned int slot_id;
trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
ep_trb_dma = le64_to_cpu(event->buffer);
- xdev = xhci->devs[slot_id];
- if (!xdev) {
- xhci_err(xhci, "ERROR Transfer event pointed to bad slot %u\n",
- slot_id);
+ ep = xhci_get_virt_ep(xhci, slot_id, ep_index);
+ if (!ep) {
+ xhci_err(xhci, "ERROR Invalid Transfer event\n");
goto err_out;
}
- ep = &xdev->eps[ep_index];
ep_ring = xhci_dma_to_transfer_ring(ep, ep_trb_dma);
- ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index);
+ ep_ctx = xhci_get_ep_ctx(xhci, ep->vdev->out_ctx, ep_index);
if (GET_EP_CTX_STATE(ep_ctx) == EP_STATE_DISABLED) {
xhci_err(xhci,
case COMP_USB_TRANSACTION_ERROR:
case COMP_INVALID_STREAM_TYPE_ERROR:
case COMP_INVALID_STREAM_ID_ERROR:
- xhci_cleanup_halted_endpoint(xhci, slot_id, ep_index, 0,
- NULL, EP_SOFT_RESET);
+ xhci_handle_halted_endpoint(xhci, ep, 0, NULL,
+ EP_SOFT_RESET);
goto cleanup;
case COMP_RING_UNDERRUN:
case COMP_RING_OVERRUN:
case COMP_STALL_ERROR:
xhci_dbg(xhci, "Stalled endpoint for slot %u ep %u\n", slot_id,
ep_index);
- ep->ep_state |= EP_HALTED;
status = -EPIPE;
break;
case COMP_SPLIT_TRANSACTION_ERROR:
if (trb_comp_code == COMP_STALL_ERROR ||
xhci_requires_manual_halt_cleanup(xhci, ep_ctx,
trb_comp_code)) {
- xhci_cleanup_halted_endpoint(xhci, slot_id,
- ep_index,
- ep_ring->stream_id,
- NULL,
- EP_HARD_RESET);
+ xhci_handle_halted_endpoint(xhci, ep,
+ ep_ring->stream_id,
+ NULL,
+ EP_HARD_RESET);
}
goto cleanup;
}
return -ESHUTDOWN;
}
- skip_isoc_td(xhci, td, event, ep, &status);
+ skip_isoc_td(xhci, td, ep, status);
goto cleanup;
}
if (trb_comp_code == COMP_SHORT_PACKET)
* endpoint. Otherwise, the endpoint remains stalled
* indefinitely.
*/
+
if (trb_is_noop(ep_trb)) {
if (trb_comp_code == COMP_STALL_ERROR ||
xhci_requires_manual_halt_cleanup(xhci, ep_ctx,
trb_comp_code))
- xhci_cleanup_halted_endpoint(xhci, slot_id,
- ep_index,
- ep_ring->stream_id,
- td, EP_HARD_RESET);
+ xhci_handle_halted_endpoint(xhci, ep,
+ ep_ring->stream_id,
+ td, EP_HARD_RESET);
goto cleanup;
}
+ td->status = status;
+
/* update the urb's actual_length and give back to the core */
if (usb_endpoint_xfer_control(&td->urb->ep->desc))
- process_ctrl_td(xhci, td, ep_trb, event, ep, &status);
+ process_ctrl_td(xhci, td, ep_trb, event, ep);
else if (usb_endpoint_xfer_isoc(&td->urb->ep->desc))
- process_isoc_td(xhci, td, ep_trb, event, ep, &status);
+ process_isoc_td(xhci, td, ep_trb, event, ep);
else
- process_bulk_intr_td(xhci, td, ep_trb, event, ep,
- &status);
+ process_bulk_intr_td(xhci, td, ep_trb, event, ep);
cleanup:
handling_skipped_tds = ep->skip &&
trb_comp_code != COMP_MISSED_SERVICE_ERROR &&
{
union xhci_trb *event;
int update_ptrs = 1;
+ u32 trb_type;
int ret;
/* Event ring hasn't been allocated yet. */
* speculative reads of the event's flags/data below.
*/
rmb();
+ trb_type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->event_cmd.flags));
/* FIXME: Handle more event types. */
- switch (le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK) {
- case TRB_TYPE(TRB_COMPLETION):
+
+ switch (trb_type) {
+ case TRB_COMPLETION:
handle_cmd_completion(xhci, &event->event_cmd);
break;
- case TRB_TYPE(TRB_PORT_STATUS):
+ case TRB_PORT_STATUS:
handle_port_status(xhci, event);
update_ptrs = 0;
break;
- case TRB_TYPE(TRB_TRANSFER):
+ case TRB_TRANSFER:
ret = handle_tx_event(xhci, &event->trans_event);
if (ret >= 0)
update_ptrs = 0;
break;
- case TRB_TYPE(TRB_DEV_NOTE):
+ case TRB_DEV_NOTE:
handle_device_notification(xhci, event);
break;
default:
- if ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK) >=
- TRB_TYPE(48))
- handle_vendor_event(xhci, event);
+ if (trb_type >= TRB_VENDOR_DEFINED_LOW)
+ handle_vendor_event(xhci, event, trb_type);
else
- xhci_warn(xhci, "ERROR unknown event type %d\n",
- TRB_FIELD_TO_TYPE(
- le32_to_cpu(event->event_cmd.flags)));
+ xhci_warn(xhci, "ERROR unknown event type %d\n", trb_type);
}
/* Any of the above functions may drop and re-acquire the lock, so check
* to make sure a watchdog timer didn't mark the host as non-responsive.
u32 ep_state, unsigned int num_trbs, gfp_t mem_flags)
{
unsigned int num_trbs_needed;
+ unsigned int link_trb_count = 0;
/* Make sure the endpoint has been added to xHC schedule */
switch (ep_state) {
ep_ring->enq_seg = ep_ring->enq_seg->next;
ep_ring->enqueue = ep_ring->enq_seg->trbs;
+
+ /* prevent infinite loop if all first trbs are link trbs */
+ if (link_trb_count++ > ep_ring->num_segs) {
+ xhci_warn(xhci, "Ring is an endless link TRB loop\n");
+ return -EINVAL;
+ }
}
+
+ if (last_trb_on_seg(ep_ring->enq_seg, ep_ring->enqueue)) {
+ xhci_warn(xhci, "Missing link TRB at end of ring segment\n");
+ return -EINVAL;
+ }
+
return 0;
}
struct xhci_ring *ep_ring;
struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index);
- ep_ring = xhci_stream_id_to_ring(xdev, ep_index, stream_id);
+ ep_ring = xhci_triad_to_transfer_ring(xhci, xdev->slot_id, ep_index,
+ stream_id);
if (!ep_ring) {
xhci_dbg(xhci, "Can't prepare ring for bad stream ID %u\n",
stream_id);
field |= TRB_IOC;
more_trbs_coming = false;
td->last_trb = ring->enqueue;
-
+ td->last_trb_seg = ring->enq_seg;
if (xhci_urb_suitable_for_idt(urb)) {
memcpy(&send_addr, urb->transfer_buffer,
trb_buff_len);
upper_32_bits(send_addr),
length_field,
field);
-
+ td->num_trbs++;
addr += trb_buff_len;
sent_len = trb_buff_len;
ep_index, urb->stream_id,
1, urb, 1, mem_flags);
urb_priv->td[1].last_trb = ring->enqueue;
+ urb_priv->td[1].last_trb_seg = ring->enq_seg;
field = TRB_TYPE(TRB_NORMAL) | ring->cycle_state | TRB_IOC;
queue_trb(xhci, ring, 0, 0, 0, TRB_INTR_TARGET(0), field);
+ urb_priv->td[1].num_trbs++;
}
check_trb_math(urb, enqd_len);
urb_priv = urb->hcpriv;
td = &urb_priv->td[0];
+ td->num_trbs = num_trbs;
/*
* Don't give the first TRB to the hardware (by toggling the cycle bit)
/* Save the DMA address of the last TRB in the TD */
td->last_trb = ep_ring->enqueue;
+ td->last_trb_seg = ep_ring->enq_seg;
/* Queue status TRB - see Table 7 and sections 4.11.2.2 and 6.4.1.2.3 */
/* If the device sent data, the status stage is an OUT transfer */
goto cleanup;
}
td = &urb_priv->td[i];
-
+ td->num_trbs = trbs_per_td;
/* use SIA as default, if frame id is used overwrite it */
sia_frame_id = TRB_SIA;
if (!(urb->transfer_flags & URB_ISO_ASAP) &&
} else {
more_trbs_coming = false;
td->last_trb = ep_ring->enqueue;
+ td->last_trb_seg = ep_ring->enq_seg;
field |= TRB_IOC;
if (trb_block_event_intr(xhci, num_tds, i))
field |= TRB_BEI;
trb_slot_id | trb_ep_index | type | trb_suspend, false);
}
-/* Set Transfer Ring Dequeue Pointer command */
-void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
- unsigned int slot_id, unsigned int ep_index,
- struct xhci_dequeue_state *deq_state)
-{
- dma_addr_t addr;
- u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id);
- u32 trb_ep_index = EP_ID_FOR_TRB(ep_index);
- u32 trb_stream_id = STREAM_ID_FOR_TRB(deq_state->stream_id);
- u32 trb_sct = 0;
- u32 type = TRB_TYPE(TRB_SET_DEQ);
- struct xhci_virt_ep *ep;
- struct xhci_command *cmd;
- int ret;
-
- xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
- "Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), new deq ptr = %p (0x%llx dma), new cycle = %u",
- deq_state->new_deq_seg,
- (unsigned long long)deq_state->new_deq_seg->dma,
- deq_state->new_deq_ptr,
- (unsigned long long)xhci_trb_virt_to_dma(
- deq_state->new_deq_seg, deq_state->new_deq_ptr),
- deq_state->new_cycle_state);
-
- addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg,
- deq_state->new_deq_ptr);
- if (addr == 0) {
- xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n");
- xhci_warn(xhci, "WARN deq seg = %p, deq pt = %p\n",
- deq_state->new_deq_seg, deq_state->new_deq_ptr);
- return;
- }
- ep = &xhci->devs[slot_id]->eps[ep_index];
- if ((ep->ep_state & SET_DEQ_PENDING)) {
- xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n");
- xhci_warn(xhci, "A Set TR Deq Ptr command is pending.\n");
- return;
- }
-
- /* This function gets called from contexts where it cannot sleep */
- cmd = xhci_alloc_command(xhci, false, GFP_ATOMIC);
- if (!cmd)
- return;
-
- ep->queued_deq_seg = deq_state->new_deq_seg;
- ep->queued_deq_ptr = deq_state->new_deq_ptr;
- if (deq_state->stream_id)
- trb_sct = SCT_FOR_TRB(SCT_PRI_TR);
- ret = queue_command(xhci, cmd,
- lower_32_bits(addr) | trb_sct | deq_state->new_cycle_state,
- upper_32_bits(addr), trb_stream_id,
- trb_slot_id | trb_ep_index | type, false);
- if (ret < 0) {
- xhci_free_command(xhci, cmd);
- return;
- }
-
- /* Stop the TD queueing code from ringing the doorbell until
- * this command completes. The HC won't set the dequeue pointer
- * if the ring is running, and ringing the doorbell starts the
- * ring running.
- */
- ep->ep_state |= SET_DEQ_PENDING;
-}
-
int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd,
int slot_id, unsigned int ep_index,
enum xhci_ep_reset_type reset_type)
projects / linux-2.6-microblaze.git / blobdiff