linux-kernel - [PATCH v22 04/38] usb: xhci: Allow for secondary interrupter to set IMOD

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Message-ID: <20240524001043.10141-5-quic_wcheng@quicinc.com>
Date: Thu, 23 May 2024 17:10:09 -0700
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>, <tiwai@...e.com>, <krzk+dt@...nel.org>,
        <Thinh.Nguyen@...opsys.com>, <broonie@...nel.org>,
        <bgoswami@...cinc.com>, <robh@...nel.org>,
        <gregkh@...uxfoundation.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 v22 04/38] usb: xhci: Allow for secondary interrupter to set IMOD

When creating a secondary interrupter, add an argument for XHCI sideband
clients to specify an interrupt moderation value for the interrupter
context.

Signed-off-by: Wesley Cheng <quic_wcheng@...cinc.com>
---
 drivers/usb/host/xhci-mem.c       | 4 +++-
 drivers/usb/host/xhci-sideband.c  | 4 ++--
 drivers/usb/host/xhci.c           | 2 +-
 drivers/usb/host/xhci.h           | 5 ++++-
 include/linux/usb/xhci-sideband.h | 2 +-
 5 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 3100219d6496..2ca5937b73f4 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2334,7 +2334,8 @@ xhci_add_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir,
 }
 
 struct xhci_interrupter *
-xhci_create_secondary_interrupter(struct usb_hcd *hcd, unsigned int segs)
+xhci_create_secondary_interrupter(struct usb_hcd *hcd, unsigned int segs,
+					u32 imod_interval)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 	struct xhci_interrupter *ir;
@@ -2367,6 +2368,7 @@ xhci_create_secondary_interrupter(struct usb_hcd *hcd, unsigned int segs)
 		return NULL;
 	}
 
+	xhci_set_interrupter_moderation(ir, imod_interval);
 	xhci_dbg(xhci, "Add secondary interrupter %d, max interrupters %d\n",
 		 i, xhci->max_interrupters);
 
diff --git a/drivers/usb/host/xhci-sideband.c b/drivers/usb/host/xhci-sideband.c
index 4879e1c3f0fe..7e7b15ec0cc7 100644
--- a/drivers/usb/host/xhci-sideband.c
+++ b/drivers/usb/host/xhci-sideband.c
@@ -254,7 +254,7 @@ EXPORT_SYMBOL_GPL(xhci_sideband_get_event_buffer);
  */
 int
 xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg,
-				 bool ip_autoclear)
+				 bool ip_autoclear, u32 imod_interval)
 {
 	int ret = 0;
 
@@ -268,7 +268,7 @@ xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg,
 	}
 
 	sb->ir = xhci_create_secondary_interrupter(xhci_to_hcd(sb->xhci),
-			num_seg);
+			num_seg, imod_interval);
 	if (!sb->ir) {
 		ret = -ENOMEM;
 		goto out;
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 3a051ed32907..0b22342bbff1 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -347,7 +347,7 @@ static int xhci_disable_interrupter(struct xhci_interrupter *ir)
 }
 
 /* interrupt moderation interval imod_interval in nanoseconds */
-static int xhci_set_interrupter_moderation(struct xhci_interrupter *ir,
+int xhci_set_interrupter_moderation(struct xhci_interrupter *ir,
 					   u32 imod_interval)
 {
 	u32 imod;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 9232c53d204a..eb1d1f946cdb 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1832,7 +1832,8 @@ struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci,
 void xhci_free_container_ctx(struct xhci_hcd *xhci,
 		struct xhci_container_ctx *ctx);
 struct xhci_interrupter *
-xhci_create_secondary_interrupter(struct usb_hcd *hcd, unsigned int segs);
+xhci_create_secondary_interrupter(struct usb_hcd *hcd, unsigned int segs,
+					u32 imod_interval);
 void xhci_remove_secondary_interrupter(struct usb_hcd
 				       *hcd, struct xhci_interrupter *ir);
 
@@ -1872,6 +1873,8 @@ 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_set_interrupter_moderation(struct xhci_interrupter *ir,
+					   u32 imod_interval);
 
 /* xHCI ring, segment, TRB, and TD functions */
 dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);
diff --git a/include/linux/usb/xhci-sideband.h b/include/linux/usb/xhci-sideband.h
index 1035dae43cee..5fc95dd499aa 100644
--- a/include/linux/usb/xhci-sideband.h
+++ b/include/linux/usb/xhci-sideband.h
@@ -56,7 +56,7 @@ xhci_sideband_get_event_buffer(struct xhci_sideband *sb);
 
 int
 xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg,
-				 bool ip_autoclear);
+				 bool ip_autoclear, u32 imod_interval);
 
 void
 xhci_sideband_remove_interrupter(struct xhci_sideband *sb);