[PATCH 2/4] usb: host: export symbols for xhci hooks usage
From: Howard Yen <hidden>
Date: 2021-01-19 10:48:28
Also in:
linux-usb, lkml
Subsystem:
the rest, usb subsystem, usb xhci driver · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Mathias Nyman
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 <redacted>
---
drivers/usb/host/xhci-mem.c | 3 +++
drivers/usb/host/xhci-ring.c | 6 ++++--
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index f3dbc5956290..69f19774b914 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c@@ -289,6 +289,7 @@ void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring) kfree(ring); } +EXPORT_SYMBOL_GPL(xhci_ring_free); static void xhci_initialize_ring_info(struct xhci_ring *ring, unsigned int cycle_state)
@@ -545,6 +546,7 @@ 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,
@@ -558,6 +560,7 @@ 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 *************************/
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index bfd653a1e5f6..f3b387e2fcb3 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c@@ -2717,7 +2717,7 @@ 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;
@@ -2786,13 +2786,14 @@ 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;
@@ -2822,6 +2823,7 @@ 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) {
--
2.30.0.284.gd98b1dd5eaa7-goog