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FROMLIST: usb: host: export symbols for xhci hooks usage

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Export symbols for xhci hooks usage:
    xhci_ring_free
        - Allow xhci hook to free xhci_ring.
    xhci_get_slot_ctx
        - Allow xhci hook to get slot_ctx from the xhci_container_ctx
	  for getting the slot_ctx information to know which slot is
	  offloading and compare the context in remote subsystem memory
	  if needed.
    xhci_get_ep_ctx
        - Allow xhci hook to get ep_ctx from the xhci_container_ctx for
	  getting the ep_ctx information to know which ep is offloading and
	  comparing the context in remote subsystem memory if needed.
    xhci_handle_event
        - Allow xhci hook to handle the xhci events from the USB
	  controller.
    xhci_update_erst_dequeue
        - If xhci events was handle by xhci hook, it needs to update
	  the erst dequeue pointer to let the USB controller know the
	  events was handled.

Signed-off-by: Howard Yen <howardyen@google.com>
Bug: 175358363
Link: https://lore.kernel.org/r/20210119101044.1637023-1-howardyen@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ic7511048c009a2ff5f2832eee971140216105f6e
This commit is contained in:
Howard Yen 2021-01-19 18:10:42 +08:00
parent ed626b01e5
commit 26afe6712d
2 changed files with 7 additions and 2 deletions
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3
drivers/usb/host/xhci-mem.c
View File

@ -292,6 +292,7 @@ void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring)
kfree(ring);
}
EXPORT_SYMBOL_GPL(xhci_ring_free);
void xhci_initialize_ring_info(struct xhci_ring *ring,
unsigned int cycle_state)
@ -554,6 +555,7 @@ struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci,
return (struct xhci_slot_ctx *)
(ctx->bytes + CTX_SIZE(xhci->hcc_params));
}
EXPORT_SYMBOL_GPL(xhci_get_slot_ctx);
struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx,
@ -567,6 +569,7 @@ struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci,
return (struct xhci_ep_ctx *)
(ctx->bytes + (ep_index * CTX_SIZE(xhci->hcc_params)));
}
EXPORT_SYMBOL_GPL(xhci_get_ep_ctx);
/***************** Streams structures manipulation *************************/

6
drivers/usb/host/xhci-ring.c
View File

@ -2897,7 +2897,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
* Returns >0 for "possibly more events to process" (caller should call again),
* otherwise 0 if done. In future, <0 returns should indicate error code.
*/
static int xhci_handle_event(struct xhci_hcd *xhci)
int xhci_handle_event(struct xhci_hcd *xhci)
{
union xhci_trb *event;
int update_ptrs = 1;
@ -2966,13 +2966,14 @@ static int xhci_handle_event(struct xhci_hcd *xhci)
*/
return 1;
}
EXPORT_SYMBOL_GPL(xhci_handle_event);
/*
* Update Event Ring Dequeue Pointer:
* - When all events have finished
* - To avoid "Event Ring Full Error" condition
*/
static void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
union xhci_trb *event_ring_deq)
{
u64 temp_64;
@ -3002,6 +3003,7 @@ static void xhci_update_erst_dequeue(struct xhci_hcd *xhci,
temp_64 |= ERST_EHB;
xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue);
}
EXPORT_SYMBOL_GPL(xhci_update_erst_dequeue);
static irqreturn_t xhci_vendor_queue_irq_work(struct xhci_hcd *xhci)
{