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 | 30 ++++++++++++++++-------------- drivers/usb/host/xhci-sideband.c | 4 ++-- drivers/usb/host/xhci.h | 2 +- include/linux/usb/xhci-sideband.h | 2 +- 4 files changed, 20 insertions(+), 18 deletions(-)
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index e4c13f056c1a..ae28dac7a747 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -2360,7 +2360,7 @@ xhci_add_interrupter(struct xhci_hcd *xhci, struct xhci_interrupter *ir, }
struct xhci_interrupter * -xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg) +xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg, int intr_num) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct xhci_interrupter *ir; @@ -2375,28 +2375,30 @@ xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg) return NULL;
spin_lock_irq(&xhci->lock); - - /* Find available secondary interrupter, interrupter 0 is reserved for primary */ + /* Find available secondary interrupter, interrupter 0 is reserverd 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 > 0 && i == intr_num) || intr_num <= 0) { + if (xhci->interrupters[i] == NULL) { + err = xhci_add_interrupter(xhci, ir, i); + if (err) { + spin_unlock_irq(&xhci->lock); + goto free_ir; + } + break; + } } } - spin_unlock_irq(&xhci->lock);
- if (err) { - xhci_warn(xhci, "Failed to add secondary interrupter, max interrupters %d\n", - xhci->max_interrupters); - xhci_free_interrupter(xhci, ir); - return NULL; - } - xhci_dbg(xhci, "Add secondary interrupter %d, max interrupters %d\n", i, xhci->max_interrupters);
return ir; + +free_ir: + xhci_free_interrupter(xhci, ir); + + return NULL; } EXPORT_SYMBOL_GPL(xhci_create_secondary_interrupter);
diff --git a/drivers/usb/host/xhci-sideband.c b/drivers/usb/host/xhci-sideband.c index 504a6f1586b5..3acbf23095e9 100644 --- a/drivers/usb/host/xhci-sideband.c +++ b/drivers/usb/host/xhci-sideband.c @@ -278,7 +278,7 @@ EXPORT_SYMBOL_GPL(xhci_sideband_enable_interrupt); */ int xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg, - bool ip_autoclear) + int intr_num, bool ip_autoclear) { int ret = 0;
@@ -292,7 +292,7 @@ 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, intr_num); if (!sb->ir) { ret = -ENOMEM; goto out; diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 96f9d1b38ff5..60abbc4103fd 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1836,7 +1836,7 @@ 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, int num_seg); +xhci_create_secondary_interrupter(struct usb_hcd *hcd, int num_seg, 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 a749ae307ba7..1026502739c5 100644 --- a/include/linux/usb/xhci-sideband.h +++ b/include/linux/usb/xhci-sideband.h @@ -58,7 +58,7 @@ int xhci_sideband_enable_interrupt(struct xhci_sideband *sb, u32 imod_interval);
int xhci_sideband_create_interrupter(struct xhci_sideband *sb, int num_seg, - bool ip_autoclear); + int intr_num, bool ip_autoclear);
void xhci_sideband_remove_interrupter(struct xhci_sideband *sb);