[RFCv2 07/10] xhci: Use command structured when queuing commands

From: Mathias Nyman
Date: Thu Jan 30 2014 - 09:03:31 EST

Require each queued command to have a command structure.
We store the command trb pointer in the structure when queuing it,
making the find_next_enqueue() function obsolete.

Don't free the command strucures right away after sending the commands,
We will free the commands when we receive a "command handled" event
in a later patch.

Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-hub.c | 8 ++--
drivers/usb/host/xhci-ring.c | 94 ++++++++++++++++++++++----------------------
drivers/usb/host/xhci.c | 47 +++++++++++-----------
drivers/usb/host/xhci.h | 31 ++++++++-------
4 files changed, 91 insertions(+), 89 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 68bc1c6..4342ec3 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -293,14 +293,14 @@ static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend)
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_free_command(xhci, cmd);
return -ENOMEM;
+
}
- xhci_queue_stop_endpoint(xhci, slot_id, i, suspend);
- kfree(command);
+ xhci_queue_stop_endpoint(xhci, command, slot_id, i,
+ suspend);
}
}
- cmd->command_trb = xhci_find_next_enqueue(xhci->cmd_ring);
list_add_tail(&cmd->cmd_list, &virt_dev->cmd_list);
- xhci_queue_stop_endpoint(xhci, slot_id, 0, suspend);
+ xhci_queue_stop_endpoint(xhci, cmd, slot_id, 0, suspend);
xhci_ring_cmd_db(xhci);
spin_unlock_irqrestore(&xhci->lock, flags);

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index bf50d28..6f6018c 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -123,16 +123,6 @@ static int enqueue_is_link_trb(struct xhci_ring *ring)
return TRB_TYPE_LINK_LE32(link->control);
}

-union xhci_trb *xhci_find_next_enqueue(struct xhci_ring *ring)
-{
- /* Enqueue pointer can be left pointing to the link TRB,
- * we must handle that
- */
- if (TRB_TYPE_LINK_LE32(ring->enqueue->link.control))
- return ring->enq_seg->next->trbs;
- return ring->enqueue;
-}
-
/* Updates trb to point to the next TRB in the ring, and updates seg if the next
* TRB is in a new segment. This does not skip over link TRBs, and it does not
* effect the ring dequeue or enqueue pointers.
@@ -680,12 +670,14 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
}
}

-static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
+static int queue_set_tr_deq(struct xhci_hcd *xhci,
+ struct xhci_command *cmd, int slot_id,
unsigned int ep_index, unsigned int stream_id,
struct xhci_segment *deq_seg,
union xhci_trb *deq_ptr, u32 cycle_state);

void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
+ struct xhci_command *cmd,
unsigned int slot_id, unsigned int ep_index,
unsigned int stream_id,
struct xhci_dequeue_state *deq_state)
@@ -700,7 +692,7 @@ void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
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);
- queue_set_tr_deq(xhci, slot_id, ep_index, stream_id,
+ queue_set_tr_deq(xhci, cmd, slot_id, ep_index, stream_id,
deq_state->new_deq_seg,
deq_state->new_deq_ptr,
(u32) deq_state->new_cycle_state);
@@ -857,12 +849,11 @@ remove_finished_td:
if (deq_state.new_deq_ptr && deq_state.new_deq_seg) {
struct xhci_command *command;
command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC);
- xhci_queue_new_dequeue_state(xhci,
+ xhci_queue_new_dequeue_state(xhci, command,
slot_id, ep_index,
ep->stopped_td->urb->stream_id,
&deq_state);
xhci_ring_cmd_db(xhci);
- kfree(command);
} else {
/* Otherwise ring the doorbell(s) to restart queued transfers */
ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
@@ -1187,11 +1178,10 @@ static void xhci_handle_cmd_reset_ep(struct xhci_hcd *xhci, int slot_id,
command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC);
xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
"Queueing configure endpoint command");
- xhci_queue_configure_endpoint(xhci,
+ xhci_queue_configure_endpoint(xhci, command,
xhci->devs[slot_id]->in_ctx->dma, slot_id,
false);
xhci_ring_cmd_db(xhci);
- kfree(command);
} else {
/* Clear our internal halted state and restart the ring(s) */
xhci->devs[slot_id]->eps[ep_index].ep_state &= ~EP_HALTED;
@@ -1922,7 +1912,7 @@ static void xhci_cleanup_halted_endpoint(struct xhci_hcd *xhci,
ep->stopped_trb = event_trb;
ep->stopped_stream = stream_id;

- xhci_queue_reset_ep(xhci, slot_id, ep_index);
+ xhci_queue_reset_ep(xhci, command, slot_id, ep_index);
xhci_cleanup_stalled_ring(xhci, td->urb->dev, ep_index);

ep->stopped_td = NULL;
@@ -1930,7 +1920,6 @@ static void xhci_cleanup_halted_endpoint(struct xhci_hcd *xhci,
ep->stopped_stream = 0;

xhci_ring_cmd_db(xhci);
- kfree(command);
}

/* Check if an error has halted the endpoint ring. The class driver will
@@ -2638,7 +2627,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
* successful event after a short transfer.
* Ignore it.
*/
- if ((xhci->quirks & XHCI_SPURIOUS_SUCCESS) &&
+ if ((xhci->quirks & XHCI_SPURIOUS_SUCCESS) &&
ep_ring->last_td_was_short) {
ep_ring->last_td_was_short = false;
ret = 0;
@@ -3980,8 +3969,9 @@ int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags,
* Don't decrement xhci->cmd_ring_reserved_trbs after we've queued the TRB
* because the command event handler may want to resubmit a failed command.
*/
-static int queue_command(struct xhci_hcd *xhci, u32 field1, u32 field2,
- u32 field3, u32 field4, bool command_must_succeed)
+static int queue_command(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ u32 field1, u32 field2,
+ u32 field3, u32 field4, bool command_must_succeed)
{
int reserved_trbs = xhci->cmd_ring_reserved_trbs;
int ret;
@@ -3998,57 +3988,64 @@ static int queue_command(struct xhci_hcd *xhci, u32 field1, u32 field2,
"unfailable commands failed.\n");
return ret;
}
+ cmd->command_trb = xhci->cmd_ring->enqueue;
+
queue_trb(xhci, xhci->cmd_ring, false, field1, field2, field3,
field4 | xhci->cmd_ring->cycle_state);
return 0;
}

/* Queue a slot enable or disable request on the command ring */
-int xhci_queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id)
+int xhci_queue_slot_control(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ u32 trb_type, u32 slot_id)
{
- return queue_command(xhci, 0, 0, 0,
+ return queue_command(xhci, cmd, 0, 0, 0,
TRB_TYPE(trb_type) | SLOT_ID_FOR_TRB(slot_id), false);
}

/* Queue an address device command TRB */
-int xhci_queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
- u32 slot_id)
+int xhci_queue_address_device(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ dma_addr_t in_ctx_ptr, u32 slot_id)
{
- return queue_command(xhci, lower_32_bits(in_ctx_ptr),
+ return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr),
upper_32_bits(in_ctx_ptr), 0,
TRB_TYPE(TRB_ADDR_DEV) | SLOT_ID_FOR_TRB(slot_id),
false);
}

-int xhci_queue_vendor_command(struct xhci_hcd *xhci,
+int xhci_queue_vendor_command(struct xhci_hcd *xhci, struct xhci_command *cmd,
u32 field1, u32 field2, u32 field3, u32 field4)
{
- return queue_command(xhci, field1, field2, field3, field4, false);
+ return queue_command(xhci, cmd, field1, field2, field3, field4, false);
}

/* Queue a reset device command TRB */
-int xhci_queue_reset_device(struct xhci_hcd *xhci, u32 slot_id)
+int xhci_queue_reset_device(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ u32 slot_id)
{
- return queue_command(xhci, 0, 0, 0,
+ return queue_command(xhci, cmd, 0, 0, 0,
TRB_TYPE(TRB_RESET_DEV) | SLOT_ID_FOR_TRB(slot_id),
false);
}

/* Queue a configure endpoint command TRB */
-int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
- u32 slot_id, bool command_must_succeed)
+int xhci_queue_configure_endpoint(struct xhci_hcd *xhci,
+ struct xhci_command *cmd,
+ dma_addr_t in_ctx_ptr,
+ u32 slot_id, bool command_must_succeed)
{
- return queue_command(xhci, lower_32_bits(in_ctx_ptr),
+ return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr),
upper_32_bits(in_ctx_ptr), 0,
TRB_TYPE(TRB_CONFIG_EP) | SLOT_ID_FOR_TRB(slot_id),
command_must_succeed);
}

/* Queue an evaluate context command TRB */
-int xhci_queue_evaluate_context(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
- u32 slot_id, bool command_must_succeed)
+int xhci_queue_evaluate_context(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ dma_addr_t in_ctx_ptr,
+ u32 slot_id, bool command_must_succeed)
{
- return queue_command(xhci, lower_32_bits(in_ctx_ptr),
+ return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr),
upper_32_bits(in_ctx_ptr), 0,
TRB_TYPE(TRB_EVAL_CONTEXT) | SLOT_ID_FOR_TRB(slot_id),
command_must_succeed);
@@ -4058,25 +4055,26 @@ int xhci_queue_evaluate_context(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
* Suspend is set to indicate "Stop Endpoint Command" is being issued to stop
* activity on an endpoint that is about to be suspended.
*/
-int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, int slot_id,
- unsigned int ep_index, int suspend)
+int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ int slot_id, unsigned int ep_index, int suspend)
{
u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id);
u32 trb_ep_index = EP_ID_FOR_TRB(ep_index);
u32 type = TRB_TYPE(TRB_STOP_RING);
u32 trb_suspend = SUSPEND_PORT_FOR_TRB(suspend);

- return queue_command(xhci, 0, 0, 0,
+ return queue_command(xhci, cmd, 0, 0, 0,
trb_slot_id | trb_ep_index | type | trb_suspend, false);
}

/* Set Transfer Ring Dequeue Pointer command.
* This should not be used for endpoints that have streams enabled.
*/
-static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
- unsigned int ep_index, unsigned int stream_id,
- struct xhci_segment *deq_seg,
- union xhci_trb *deq_ptr, u32 cycle_state)
+static int queue_set_tr_deq(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ int slot_id,
+ unsigned int ep_index, unsigned int stream_id,
+ struct xhci_segment *deq_seg,
+ union xhci_trb *deq_ptr, u32 cycle_state)
{
dma_addr_t addr;
u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id);
@@ -4100,18 +4098,18 @@ static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
}
ep->queued_deq_seg = deq_seg;
ep->queued_deq_ptr = deq_ptr;
- return queue_command(xhci, lower_32_bits(addr) | cycle_state,
+ return queue_command(xhci, cmd, lower_32_bits(addr) | cycle_state,
upper_32_bits(addr), trb_stream_id,
trb_slot_id | trb_ep_index | type, false);
}

-int xhci_queue_reset_ep(struct xhci_hcd *xhci, int slot_id,
- unsigned int ep_index)
+int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ int slot_id, unsigned int ep_index)
{
u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id);
u32 trb_ep_index = EP_ID_FOR_TRB(ep_index);
u32 type = TRB_TYPE(TRB_RESET_EP);

- return queue_command(xhci, 0, 0, 0, trb_slot_id | trb_ep_index | type,
- false);
+ return queue_command(xhci, cmd, 0, 0, 0,
+ trb_slot_id | trb_ep_index | type, false);
}
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 37a1a7e..393d658 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -631,10 +631,14 @@ int xhci_run(struct usb_hcd *hcd)
&xhci->ir_set->irq_pending);
xhci_print_ir_set(xhci, 0);

- if (xhci->quirks & XHCI_NEC_HOST)
- xhci_queue_vendor_command(xhci, 0, 0, 0,
+ if (xhci->quirks & XHCI_NEC_HOST) {
+ struct xhci_command *command;
+ command = xhci_alloc_command(xhci, false, false, GFP_KERNEL);
+ if (!command)
+ return -ENOMEM;
+ xhci_queue_vendor_command(xhci, command, 0, 0, 0,
TRB_TYPE(TRB_NEC_GET_FW));
-
+ }
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"Finished xhci_run for USB2 roothub");
return 0;
@@ -1542,9 +1546,9 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
ep->stop_cmd_timer.expires = jiffies +
XHCI_STOP_EP_CMD_TIMEOUT * HZ;
add_timer(&ep->stop_cmd_timer);
- xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index, 0);
+ xhci_queue_stop_endpoint(xhci, command, urb->dev->slot_id,
+ ep_index, 0);
xhci_ring_cmd_db(xhci);
- kfree(command);
}
done:
spin_unlock_irqrestore(&xhci->lock, flags);
@@ -2614,14 +2618,15 @@ static int xhci_configure_endpoint(struct xhci_hcd *xhci,
return -ENOMEM;
}

- command->command_trb = xhci_find_next_enqueue(xhci->cmd_ring);
list_add_tail(&command->cmd_list, &virt_dev->cmd_list);

if (!ctx_change)
- ret = xhci_queue_configure_endpoint(xhci, command->in_ctx->dma,
+ ret = xhci_queue_configure_endpoint(xhci, command,
+ command->in_ctx->dma,
udev->slot_id, must_succeed);
else
- ret = xhci_queue_evaluate_context(xhci, command->in_ctx->dma,
+ ret = xhci_queue_evaluate_context(xhci, command,
+ command->in_ctx->dma,
udev->slot_id, must_succeed);
if (ret < 0) {
list_del(&command->cmd_list);
@@ -2876,9 +2881,8 @@ void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
return;
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Queueing new dequeue state");
- xhci_queue_new_dequeue_state(xhci, udev->slot_id,
+ xhci_queue_new_dequeue_state(xhci, command, udev->slot_id,
ep_index, ep->stopped_stream, &deq_state);
- kfree(command);
} else {
/* Better hope no one uses the input context between now and the
* reset endpoint completion!
@@ -2938,7 +2942,7 @@ void xhci_endpoint_reset(struct usb_hcd *hcd,
xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
"Queueing reset endpoint command");
spin_lock_irqsave(&xhci->lock, flags);
- ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index);
+ ret = xhci_queue_reset_ep(xhci, command, udev->slot_id, ep_index);
/*
* Can't change the ring dequeue pointer until it's transitioned to the
* stopped state, which is only upon a successful reset endpoint
@@ -2953,7 +2957,6 @@ void xhci_endpoint_reset(struct usb_hcd *hcd,
virt_ep->stopped_trb = NULL;
virt_ep->stopped_stream = 0;
spin_unlock_irqrestore(&xhci->lock, flags);
- kfree(command);

if (ret)
xhci_warn(xhci, "FIXME allocate a new ring segment\n");
@@ -3465,10 +3468,9 @@ int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev)

/* Attempt to submit the Reset Device command to the command ring */
spin_lock_irqsave(&xhci->lock, flags);
- reset_device_cmd->command_trb = xhci_find_next_enqueue(xhci->cmd_ring);

list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list);
- ret = xhci_queue_reset_device(xhci, slot_id);
+ ret = xhci_queue_reset_device(xhci, reset_device_cmd, slot_id);
if (ret) {
xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
list_del(&reset_device_cmd->cmd_list);
@@ -3623,15 +3625,14 @@ void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
return;
}

- if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) {
+ if (xhci_queue_slot_control(xhci, command, TRB_DISABLE_SLOT,
+ udev->slot_id)) {
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
- kfree(command);
return;
}
xhci_ring_cmd_db(xhci);
spin_unlock_irqrestore(&xhci->lock, flags);
- kfree(command);

/*
* Event command completion handler will free any data structures
@@ -3679,9 +3680,8 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
return 0;

spin_lock_irqsave(&xhci->lock, flags);
- command->command_trb = xhci_find_next_enqueue(xhci->cmd_ring);
command->completion = &xhci->addr_dev;
- ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0);
+ ret = xhci_queue_slot_control(xhci, command, TRB_ENABLE_SLOT, 0);
if (ret) {
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
@@ -3750,10 +3750,12 @@ int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
disable_slot:
/* Disable slot, if we can do it without mem alloc */
spin_lock_irqsave(&xhci->lock, flags);
- if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id))
+ command->completion = NULL;
+ command->status = 0;
+ if (!xhci_queue_slot_control(xhci, command, TRB_DISABLE_SLOT,
+ udev->slot_id))
xhci_ring_cmd_db(xhci);
spin_unlock_irqrestore(&xhci->lock, flags);
- kfree(command);
return 0;
}

@@ -3828,8 +3830,7 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
slot_ctx->dev_info >> 27);

spin_lock_irqsave(&xhci->lock, flags);
- command->command_trb = xhci_find_next_enqueue(xhci->cmd_ring);
- ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma,
+ ret = xhci_queue_address_device(xhci, command, virt_dev->in_ctx->dma,
udev->slot_id);
if (ret) {
spin_unlock_irqrestore(&xhci->lock, flags);
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 03c74b7..d02b73d 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1811,13 +1811,14 @@ struct xhci_segment *trb_in_td(struct xhci_segment *start_seg,
dma_addr_t suspect_dma);
int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code);
void xhci_ring_cmd_db(struct xhci_hcd *xhci);
-int xhci_queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id);
-int xhci_queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
- u32 slot_id);
-int xhci_queue_vendor_command(struct xhci_hcd *xhci,
+int xhci_queue_slot_control(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ u32 trb_type, u32 slot_id);
+int xhci_queue_address_device(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ dma_addr_t in_ctx_ptr, u32 slot_id);
+int xhci_queue_vendor_command(struct xhci_hcd *xhci, struct xhci_command *cmd,
u32 field1, u32 field2, u32 field3, u32 field4);
-int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, int slot_id,
- unsigned int ep_index, int suspend);
+int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ int slot_id, unsigned int ep_index, int suspend);
int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
int slot_id, unsigned int ep_index);
int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
@@ -1826,18 +1827,21 @@ int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
int slot_id, unsigned int ep_index);
int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags,
struct urb *urb, int slot_id, unsigned int ep_index);
-int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
- u32 slot_id, bool command_must_succeed);
-int xhci_queue_evaluate_context(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
- u32 slot_id, bool command_must_succeed);
-int xhci_queue_reset_ep(struct xhci_hcd *xhci, int slot_id,
- unsigned int ep_index);
-int xhci_queue_reset_device(struct xhci_hcd *xhci, u32 slot_id);
+int xhci_queue_configure_endpoint(struct xhci_hcd *xhci,
+ struct xhci_command *cmd, dma_addr_t in_ctx_ptr, u32 slot_id,
+ bool command_must_succeed);
+int xhci_queue_evaluate_context(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ dma_addr_t in_ctx_ptr, u32 slot_id, bool command_must_succeed);
+int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ int slot_id, unsigned int ep_index);
+int xhci_queue_reset_device(struct xhci_hcd *xhci, struct xhci_command *cmd,
+ u32 slot_id);
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);
void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
+ struct xhci_command *cmd,
unsigned int slot_id, unsigned int ep_index,
unsigned int stream_id,
struct xhci_dequeue_state *deq_state);
@@ -1851,7 +1855,6 @@ int xhci_cancel_cmd(struct xhci_hcd *xhci, struct xhci_command *command,
union xhci_trb *cmd_trb);
void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, unsigned int slot_id,
unsigned int ep_index, unsigned int stream_id);
-union xhci_trb *xhci_find_next_enqueue(struct xhci_ring *ring);

/* xHCI roothub code */
void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,
--
1.8.1.2

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