Date: Wed, 2 Sep 2020 10:11:21 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r365240 - stable/11/sys/dev/usb/controller Message-ID: <202009021011.082ABLcE004436@repo.freebsd.org>
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Author: hselasky Date: Wed Sep 2 10:11:21 2020 New Revision: 365240 URL: https://svnweb.freebsd.org/changeset/base/365240 Log: MFC r364347: Check the XHCI endpoint state before issuing XHCI endpoint commands. Differential Revision: https://reviews.freebsd.org/D26064 Reviewed by: kp@ and bz@ Sponsored by: Mellanox Technologies Modified: stable/11/sys/dev/usb/controller/xhci.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/usb/controller/xhci.c ============================================================================== --- stable/11/sys/dev/usb/controller/xhci.c Wed Sep 2 10:10:28 2020 (r365239) +++ stable/11/sys/dev/usb/controller/xhci.c Wed Sep 2 10:11:21 2020 (r365240) @@ -3807,6 +3807,28 @@ alloc_dma_set: } } +static uint8_t +xhci_get_endpoint_state(struct usb_device *udev, uint8_t epno) +{ + struct xhci_softc *sc = XHCI_BUS2SC(udev->bus); + struct usb_page_search buf_dev; + struct xhci_hw_dev *hdev; + struct xhci_dev_ctx *pdev; + uint32_t temp; + + MPASS(epno != 0); + + hdev = &sc->sc_hw.devs[udev->controller_slot_id]; + + usbd_get_page(&hdev->device_pc, 0, &buf_dev); + pdev = buf_dev.buffer; + usb_pc_cpu_invalidate(&hdev->device_pc); + + temp = xhci_ctx_get_le32(sc, &pdev->ctx_ep[epno - 1].dwEpCtx0); + + return (XHCI_EPCTX_0_EPSTATE_GET(temp)); +} + static usb_error_t xhci_configure_reset_endpoint(struct usb_xfer *xfer) { @@ -3860,16 +3882,20 @@ xhci_configure_reset_endpoint(struct usb_xfer *xfer) * Get the endpoint into the stopped state according to the * endpoint context state diagram in the XHCI specification: */ - - err = xhci_cmd_stop_ep(sc, 0, epno, index); - - if (err != 0) - DPRINTF("Could not stop endpoint %u\n", epno); - - err = xhci_cmd_reset_ep(sc, 0, epno, index); - - if (err != 0) - DPRINTF("Could not reset endpoint %u\n", epno); + switch (xhci_get_endpoint_state(udev, epno)) { + case XHCI_EPCTX_0_EPSTATE_STOPPED: + break; + case XHCI_EPCTX_0_EPSTATE_HALTED: + err = xhci_cmd_reset_ep(sc, 0, epno, index); + if (err != 0) + DPRINTF("Could not reset endpoint %u\n", epno); + break; + default: + err = xhci_cmd_stop_ep(sc, 0, epno, index); + if (err != 0) + DPRINTF("Could not stop endpoint %u\n", epno); + break; + } err = xhci_cmd_set_tr_dequeue_ptr(sc, (pepext->physaddr + (stream_id * sizeof(struct xhci_trb) *
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