From: Howard Yen <howardyen@google.com>
To: gregkh@linuxfoundation.org, robh+dt@kernel.org, mathias.nyman@intel.com
Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, Howard Yen <howardyen@google.com>
Subject: [PATCH 2/4] usb: host: export symbols for xhci hooks usage
Date: Tue, 19 Jan 2021 18:10:42 +0800 [thread overview]
Message-ID: <20210119101044.1637023-3-howardyen@google.com> (raw)
In-Reply-To: <20210119101044.1637023-1-howardyen@google.com>
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>
---
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
next prev parent reply other threads:[~2021-01-19 12:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-19 10:10 [PATCH 0/4] add xhci hooks for USB offload Howard Yen
2021-01-19 10:10 ` [PATCH 1/4] usb: host: " Howard Yen
2021-01-19 10:27 ` Greg KH
2021-01-19 10:10 ` Howard Yen [this message]
2021-01-19 10:10 ` [PATCH 3/4] usb: xhci-plat: add xhci_plat_priv_overwrite Howard Yen
2021-01-19 10:10 ` [PATCH 4/4] dt-bindings: usb: usb-xhci: add USB offload support Howard Yen
2021-01-19 10:22 ` Greg KH
2021-02-09 2:30 ` Rob Herring
2021-01-19 10:25 ` [PATCH 0/4] add xhci hooks for USB offload Greg KH
2021-01-19 12:49 ` Mathias Nyman
2021-01-20 10:04 ` Howard Yen
2021-01-22 15:32 ` Mathias Nyman
2021-01-26 14:19 ` Greg KH
2021-01-28 3:38 ` Howard Yen
2021-01-28 6:31 ` Mathias Nyman
2021-01-28 7:41 ` Greg KH
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