Some clients may operate only on a specific XHCI interrupter instance. Allow for the associated class driver to request for the interrupter that it requires.
Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- drivers/usb/host/xhci-mem.c | 25 +++++++++++++++---------- drivers/usb/host/xhci-sideband.c | 4 ++-- drivers/usb/host/xhci.h | 2 +- include/linux/usb/xhci-sideband.h | 2 +- 4 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 60dfc59260d8..9e2cd962f164 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -2340,14 +2340,15 @@ 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, - u32 imod_interval) + u32 imod_interval, unsigned int intr_num) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct xhci_interrupter *ir; unsigned int i; int err = -ENOSPC;
- if (!xhci->interrupters || xhci->max_interrupters <= 1) + if (!xhci->interrupters || xhci->max_interrupters <= 1 || + intr_num >= xhci->max_interrupters) return NULL;
ir = xhci_alloc_interrupter(xhci, segs, GFP_KERNEL); @@ -2355,15 +2356,18 @@ xhci_create_secondary_interrupter(struct usb_hcd *hcd, unsigned int segs, return NULL;
spin_lock_irq(&xhci->lock); - - /* Find available secondary interrupter, interrupter 0 is reserved for primary */ - for (i = 1; i < xhci->max_interrupters; i++) { - if (xhci->interrupters[i] == NULL) { - err = xhci_add_interrupter(xhci, ir, i); - break; + if (!intr_num) { + /* Find available secondary interrupter, interrupter 0 is reserved for primary */ + for (i = 1; i < xhci->max_interrupters; i++) { + if (xhci->interrupters[i] == NULL) { + err = xhci_add_interrupter(xhci, ir, i); + break; + } } + } else { + if (xhci->interrupters[intr_num] == NULL) + err = xhci_add_interrupter(xhci, ir, intr_num); } - spin_unlock_irq(&xhci->lock);
if (err) { @@ -2374,8 +2378,9 @@ xhci_create_secondary_interrupter(struct usb_hcd *hcd, unsigned int segs, }
xhci_set_interrupter_moderation(ir, imod_interval); + xhci_dbg(xhci, "Add secondary interrupter %d, max interrupters %d\n", - i, xhci->max_interrupters); + ir->intr_num, xhci->max_interrupters);
return ir; } diff --git a/drivers/usb/host/xhci-sideband.c b/drivers/usb/host/xhci-sideband.c index f06bb49ede4d..b69d3e94432f 100644 --- a/drivers/usb/host/xhci-sideband.c +++ b/drivers/usb/host/xhci-sideband.c @@ -259,7 +259,7 @@ EXPORT_SYMBOL_GPL(xhci_sideband_get_event_buffer); */ int xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg, - bool ip_autoclear, u32 imod_interval) + bool ip_autoclear, u32 imod_interval, int intr_num) { int ret = 0;
@@ -273,7 +273,7 @@ xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg, }
sb->ir = xhci_create_secondary_interrupter(xhci_to_hcd(sb->xhci), - num_seg, imod_interval); + num_seg, imod_interval, intr_num); if (!sb->ir) { ret = -ENOMEM; goto out; diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 6e1198082b4f..49786ea5bdc1 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1833,7 +1833,7 @@ 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, - u32 imod_interval); + u32 imod_interval, unsigned int intr_num); void xhci_remove_secondary_interrupter(struct usb_hcd *hcd, struct xhci_interrupter *ir); void xhci_skip_sec_intr_events(struct xhci_hcd *xhci, diff --git a/include/linux/usb/xhci-sideband.h b/include/linux/usb/xhci-sideband.h index dd4b1a27c08d..a6d8b9a86da4 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, u32 imod_interval); + bool ip_autoclear, u32 imod_interval, int intr_num);
void xhci_sideband_remove_interrupter(struct xhci_sideband *sb);