[PATCH v24 04/34] usb: xhci: Allow for secondary interrupter to set IMOD

Wesley Cheng
2024-08-01T01:23:42Z

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@quicinc.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 8e1f13fd07f7..40058bd68dff 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);