linux-kernel - [PATCH v13 13/53] usb: host: xhci: Export enable and disable interrupter APIs

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Date: Fri, 2 Feb 2024 18:36:05 -0800
From: Wesley Cheng <quic_wcheng@...cinc.com>
To: <srinivas.kandagatla@...aro.org>, <mathias.nyman@...el.com>,
        <perex@...ex.cz>, <conor+dt@...nel.org>, <corbet@....net>,
        <lgirdwood@...il.com>, <andersson@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <gregkh@...uxfoundation.org>,
        <Thinh.Nguyen@...opsys.com>, <broonie@...nel.org>,
        <bgoswami@...cinc.com>, <tiwai@...e.com>, <robh+dt@...nel.org>,
        <konrad.dybcio@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-sound@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <alsa-devel@...a-project.org>, Wesley Cheng <quic_wcheng@...cinc.com>
Subject: [PATCH v13 13/53] usb: host: xhci: Export enable and disable interrupter APIs

Secondary interrupters can be OS owned, so expose the enable and disable
interrupter APIs, so that the interrupts can be configured as requested
depending on the client.

Signed-off-by: Wesley Cheng <quic_wcheng@...cinc.com>
---
 drivers/usb/host/xhci.c | 6 ++++--
 drivers/usb/host/xhci.h | 2 ++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 872ce8c1a5ba..834d8d160da4 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -320,7 +320,7 @@ static void xhci_zero_64b_regs(struct xhci_hcd *xhci)
 		xhci_info(xhci, "Fault detected\n");
 }
 
-static int xhci_enable_interrupter(struct xhci_interrupter *ir)
+int xhci_enable_interrupter(struct xhci_interrupter *ir)
 {
 	u32 iman;
 
@@ -332,8 +332,9 @@ static int xhci_enable_interrupter(struct xhci_interrupter *ir)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(xhci_enable_interrupter);
 
-static int xhci_disable_interrupter(struct xhci_interrupter *ir)
+int xhci_disable_interrupter(struct xhci_interrupter *ir)
 {
 	u32 iman;
 
@@ -345,6 +346,7 @@ static int xhci_disable_interrupter(struct xhci_interrupter *ir)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(xhci_disable_interrupter);
 
 /* interrupt moderation interval imod_interval in nanoseconds */
 static int xhci_set_interrupter_moderation(struct xhci_interrupter *ir,
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index eaea676c85d2..7c2481838f79 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1871,6 +1871,8 @@ int xhci_alloc_tt_info(struct xhci_hcd *xhci,
 		struct xhci_virt_device *virt_dev,
 		struct usb_device *hdev,
 		struct usb_tt *tt, gfp_t mem_flags);
+int xhci_enable_interrupter(struct xhci_interrupter *ir);
+int xhci_disable_interrupter(struct xhci_interrupter *ir);
 
 /* xHCI ring, segment, TRB, and TD functions */
 dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);