The branch main has been updated by aokblast: URL: https://cgit.FreeBSD.org/src/commit/?id=0f59df83869d3734a33d96b01381823e6a3ef3ff
commit 0f59df83869d3734a33d96b01381823e6a3ef3ff Author: ShengYi Hung <[email protected]> AuthorDate: 2026-08-24 17:51:41 +0000 Commit: ShengYi Hung <[email protected]> CommitDate: 2026-08-26 20:52:11 +0000 xhci: Only reset the data toggle value when the USB stack asks for it The previous patch assumes that we don't want to reset toggle bit in STOPPED_STEP. However, a device can explicitly call usbd_clear_data_toggle if necessary. As a result, instead of not dropping the bit unconditionally, we added a field in xhci to specify that we want to drop it, so that usbd_clear_data_toggle can handle it correctly. Reported by: oh Reviewed by: kevans Tested by: oh Fixes: 28d85db46b48 ("xhci: Do not drop and add bits in xhci") MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D59186 --- sys/dev/usb/controller/xhci.c | 23 ++++++++++++++++++----- sys/dev/usb/controller/xhci.h | 1 + 2 files changed, 19 insertions(+), 5 deletions(-) diff --git a/sys/dev/usb/controller/xhci.c b/sys/dev/usb/controller/xhci.c index c385631f22d7..72a0b704b9b6 100644 --- a/sys/dev/usb/controller/xhci.c +++ b/sys/dev/usb/controller/xhci.c @@ -3940,6 +3940,11 @@ xhci_configure_reset_endpoint(struct usb_xfer *xfer) if (epno == 0) return (USB_ERR_NO_PIPE); /* invalid */ + USB_BUS_LOCK(udev->bus); + drop = pepext->trb_toggle_reset; + pepext->trb_toggle_reset = 0; + USB_BUS_UNLOCK(udev->bus); + XHCI_CMD_LOCK(sc); /* configure endpoint */ @@ -3957,14 +3962,16 @@ xhci_configure_reset_endpoint(struct usb_xfer *xfer) */ switch (xhci_get_endpoint_state(udev, epno)) { case XHCI_EPCTX_0_EPSTATE_DISABLED: - case XHCI_EPCTX_0_EPSTATE_STOPPED: drop = 0; break; + case XHCI_EPCTX_0_EPSTATE_STOPPED: + break; case XHCI_EPCTX_0_EPSTATE_HALTED: err = xhci_cmd_reset_ep(sc, 0, epno, index); - drop = (err != 0); - if (drop) + if (err != 0) { + drop = 1; DPRINTF("Could not reset endpoint %u\n", epno); + } break; default: /* @@ -3974,9 +3981,10 @@ xhci_configure_reset_endpoint(struct usb_xfer *xfer) * result, xHCI may refuse to receive or process the packet. */ err = xhci_cmd_stop_ep(sc, 0, epno, index); - drop = (err != 0); - if (drop) + if (err != 0) { + drop = 1; DPRINTF("Could not stop endpoint %u\n", epno); + } break; } @@ -4241,6 +4249,11 @@ xhci_ep_clear_stall(struct usb_device *udev, struct usb_endpoint *ep) USB_BUS_LOCK(udev->bus); pepext->trb_halted = 1; pepext->trb_running = 0; + /* + * The USB stack has cleared its own data toggle value and expects + * the hardware data toggle value to be cleared as well: + */ + pepext->trb_toggle_reset = 1; USB_BUS_UNLOCK(udev->bus); } diff --git a/sys/dev/usb/controller/xhci.h b/sys/dev/usb/controller/xhci.h index 3758815238ad..c2e6cde8ad77 100644 --- a/sys/dev/usb/controller/xhci.h +++ b/sys/dev/usb/controller/xhci.h @@ -419,6 +419,7 @@ struct xhci_endpoint_ext { uint8_t trb_index[XHCI_MAX_STREAMS]; uint8_t trb_halted; uint8_t trb_running; + uint8_t trb_toggle_reset; uint8_t trb_ep_mode; uint8_t trb_ep_maxp; };
