> Date: Thu, 9 Mar 2017 14:32:29 +0100 > From: Martin Pieuchot <m...@openbsd.org> > > Diff below move per HC driver polling code to the stack. I know this > code contains a use-after-free and this will be addressed in a later > diff. For the moment merge 4 copies into 1 such that I don't have to > fix all of them. > > As a side effect, this fix xhci(4) polling mode. That means you can > now use ddb(4) with an xhci(4)-attached keyboard. > > ok?
Looks like a good idea to me. Hwoever... > > Index: usbdi.c > =================================================================== > RCS file: /cvs/src/sys/dev/usb/usbdi.c,v > retrieving revision 1.87 > diff -u -p -r1.87 usbdi.c > --- usbdi.c 6 Mar 2017 12:13:58 -0000 1.87 > +++ usbdi.c 9 Mar 2017 13:27:06 -0000 > @@ -279,6 +279,8 @@ usbd_status > usbd_transfer(struct usbd_xfer *xfer) > { > struct usbd_pipe *pipe = xfer->pipe; > + struct usbd_bus *bus = pipe->device->bus; > + int polling = bus->use_polling; > usbd_status err; > int flags, s; > > @@ -298,8 +300,6 @@ usbd_transfer(struct usbd_xfer *xfer) > > /* If there is no buffer, allocate one. */ > if ((xfer->rqflags & URQ_DEV_DMABUF) == 0) { > - struct usbd_bus *bus = pipe->device->bus; > - > #ifdef DIAGNOSTIC > if (xfer->rqflags & URQ_AUTO_DMABUF) > printf("usbd_transfer: has old buffer!\n"); > @@ -325,8 +325,6 @@ usbd_transfer(struct usbd_xfer *xfer) > if (err != USBD_IN_PROGRESS && err) { > /* The transfer has not been queued, so free buffer. */ > if (xfer->rqflags & URQ_AUTO_DMABUF) { > - struct usbd_bus *bus = pipe->device->bus; > - > usb_freemem(bus, &xfer->dmabuf); > xfer->rqflags &= ~URQ_AUTO_DMABUF; > } > @@ -338,19 +336,34 @@ usbd_transfer(struct usbd_xfer *xfer) > /* Sync transfer, wait for completion. */ > if (err != USBD_IN_PROGRESS) > return (err); > + > s = splusb(); > - while (!xfer->done) { > - if (pipe->device->bus->use_polling) > - panic("usbd_transfer: not done"); > - flags = PRIBIO | (xfer->flags & USBD_CATCH ? PCATCH : 0); > - > - err = tsleep(xfer, flags, "usbsyn", 0); > - if (err && !xfer->done) { > - usbd_abort_pipe(pipe); > - if (err == EINTR) > - xfer->status = USBD_INTERRUPTED; > - else > - xfer->status = USBD_TIMEOUT; > + if (polling) { > + int timo; > + > + for (timo = xfer->timeout; timo >= 0; timo--) { > + usb_delay_ms(bus, 1); The xxx_waitintr() implementations have a sc->sc_bus.dying check here. I'd expect that that check would still be necessary... > + usbd_dopoll(pipe->device); > + if (xfer->done) > + break; > + } > + > + if (timo < 0) { > + xfer->status = USBD_TIMEOUT; > + usb_transfer_complete(xfer); > + } > + } else { > + while (!xfer->done) { > + flags = PRIBIO|(xfer->flags & USBD_CATCH ? PCATCH : 0); > + > + err = tsleep(xfer, flags, "usbsyn", 0); > + if (err && !xfer->done) { > + usbd_abort_pipe(pipe); > + if (err == EINTR) > + xfer->status = USBD_INTERRUPTED; > + else > + xfer->status = USBD_TIMEOUT; > + } > } > } > splx(s); > Index: ehci.c > =================================================================== > RCS file: /cvs/src/sys/dev/usb/ehci.c,v > retrieving revision 1.195 > diff -u -p -r1.195 ehci.c > --- ehci.c 8 Nov 2016 10:31:30 -0000 1.195 > +++ ehci.c 9 Mar 2017 13:19:42 -0000 > @@ -117,7 +117,6 @@ int ehci_setaddr(struct usbd_device *, > void ehci_poll(struct usbd_bus *); > void ehci_softintr(void *); > int ehci_intr1(struct ehci_softc *); > -void ehci_waitintr(struct ehci_softc *, struct usbd_xfer *); > void ehci_check_intr(struct ehci_softc *, struct usbd_xfer *); > void ehci_check_qh_intr(struct ehci_softc *, struct usbd_xfer *); > void ehci_check_itd_intr(struct ehci_softc *, struct usbd_xfer *); > @@ -918,37 +917,6 @@ ehci_idone(struct usbd_xfer *xfer) > DPRINTFN(/*12*/2, ("ehci_idone: ex=%p done\n", ex)); > } > > -/* > - * Wait here until controller claims to have an interrupt. > - * Then call ehci_intr and return. Use timeout to avoid waiting > - * too long. > - */ > -void > -ehci_waitintr(struct ehci_softc *sc, struct usbd_xfer *xfer) > -{ > - int timo; > - u_int32_t intrs; > - > - xfer->status = USBD_IN_PROGRESS; > - for (timo = xfer->timeout; timo >= 0; timo--) { > - usb_delay_ms(&sc->sc_bus, 1); > - if (sc->sc_bus.dying) > - break; > - intrs = EHCI_STS_INTRS(EOREAD4(sc, EHCI_USBSTS)) & > - sc->sc_eintrs; > - if (intrs) { > - ehci_intr1(sc); > - if (xfer->status != USBD_IN_PROGRESS) > - return; > - } > - } > - > - /* Timeout */ > - xfer->status = USBD_TIMEOUT; > - usb_transfer_complete(xfer); > - /* XXX should free TD */ > -} > - > void > ehci_poll(struct usbd_bus *bus) > { > @@ -2973,9 +2941,6 @@ ehci_device_ctrl_start(struct usbd_xfer > xfer->status = USBD_IN_PROGRESS; > splx(s); > > - if (sc->sc_bus.use_polling) > - ehci_waitintr(sc, xfer); > - > return (USBD_IN_PROGRESS); > > bad3: > @@ -3073,9 +3038,6 @@ ehci_device_bulk_start(struct usbd_xfer > xfer->status = USBD_IN_PROGRESS; > splx(s); > > - if (sc->sc_bus.use_polling) > - ehci_waitintr(sc, xfer); > - > return (USBD_IN_PROGRESS); > } > > @@ -3188,9 +3150,6 @@ ehci_device_intr_start(struct usbd_xfer > TAILQ_INSERT_TAIL(&sc->sc_intrhead, ex, inext); > xfer->status = USBD_IN_PROGRESS; > splx(s); > - > - if (sc->sc_bus.use_polling) > - ehci_waitintr(sc, xfer); > > return (USBD_IN_PROGRESS); > } > Index: ohci.c > =================================================================== > RCS file: /cvs/src/sys/dev/usb/ohci.c,v > retrieving revision 1.147 > diff -u -p -r1.147 ohci.c > --- ohci.c 15 Sep 2016 02:00:17 -0000 1.147 > +++ ohci.c 9 Mar 2017 13:22:37 -0000 > @@ -90,7 +90,6 @@ usbd_status ohci_open(struct usbd_pipe * > int ohci_setaddr(struct usbd_device *, int); > void ohci_poll(struct usbd_bus *); > void ohci_softintr(void *); > -void ohci_waitintr(struct ohci_softc *, struct usbd_xfer *); > void ohci_add_done(struct ohci_softc *, ohci_physaddr_t); > void ohci_rhsc(struct ohci_softc *, struct usbd_xfer *); > > @@ -1506,42 +1505,6 @@ ohci_root_ctrl_done(struct usbd_xfer *xf > { > } > > -/* > - * Wait here until controller claims to have an interrupt. > - * Then call ohci_intr and return. Use timeout to avoid waiting > - * too long. > - */ > -void > -ohci_waitintr(struct ohci_softc *sc, struct usbd_xfer *xfer) > -{ > - int timo; > - u_int32_t intrs; > - > - xfer->status = USBD_IN_PROGRESS; > - for (timo = xfer->timeout; timo >= 0; timo--) { > - usb_delay_ms(&sc->sc_bus, 1); > - if (sc->sc_bus.dying) > - break; > - intrs = OREAD4(sc, OHCI_INTERRUPT_STATUS) & sc->sc_eintrs; > - DPRINTFN(15,("ohci_waitintr: 0x%04x\n", intrs)); > -#ifdef OHCI_DEBUG > - if (ohcidebug > 15) > - ohci_dumpregs(sc); > -#endif > - if (intrs) { > - ohci_intr1(sc); > - if (xfer->status != USBD_IN_PROGRESS) > - return; > - } > - } > - > - /* Timeout */ > - DPRINTF(("ohci_waitintr: timeout\n")); > - xfer->status = USBD_TIMEOUT; > - usb_transfer_complete(xfer); > - /* XXX should free TD */ > -} > - > void > ohci_poll(struct usbd_bus *bus) > { > @@ -2686,9 +2649,6 @@ ohci_device_ctrl_start(struct usbd_xfer > if (err) > return (err); > > - if (sc->sc_bus.use_polling) > - ohci_waitintr(sc, xfer); > - > return (USBD_IN_PROGRESS); > } > > @@ -2826,9 +2786,6 @@ ohci_device_bulk_start(struct usbd_xfer > > splx(s); > > - if (sc->sc_bus.use_polling) > - ohci_waitintr(sc, xfer); > - > return (USBD_IN_PROGRESS); > } > > @@ -2944,9 +2901,6 @@ ohci_device_intr_start(struct usbd_xfer > #endif > splx(s); > > - if (sc->sc_bus.use_polling) > - ohci_waitintr(sc, xfer); > - > return (USBD_IN_PROGRESS); > } > > @@ -3219,13 +3173,6 @@ ohci_device_isoc_start(struct usbd_xfer > if (xfer->status != USBD_IN_PROGRESS) > printf("ohci_device_isoc_start: not in progress %p\n", xfer); > #endif > - > - /* XXX anything to do? */ > - > - if (sc->sc_bus.use_polling) { > - DPRINTF(("Starting ohci isoc xfer with polling. Bad idea?\n")); > - ohci_waitintr(sc, xfer); > - } > > return (USBD_IN_PROGRESS); > } > Index: uhci.c > =================================================================== > RCS file: /cvs/src/sys/dev/usb/uhci.c,v > retrieving revision 1.140 > diff -u -p -r1.140 uhci.c > --- uhci.c 2 Feb 2017 22:31:05 -0000 1.140 > +++ uhci.c 9 Mar 2017 13:22:56 -0000 > @@ -119,7 +119,6 @@ usbd_status uhci_alloc_std_chain(struct > struct usbd_xfer *, struct uhci_soft_td **, > struct uhci_soft_td **); > void uhci_poll_hub(void *); > -void uhci_waitintr(struct uhci_softc *, struct usbd_xfer *); > void uhci_check_intr(struct uhci_softc *, struct usbd_xfer *); > void uhci_idone(struct usbd_xfer *); > > @@ -1337,38 +1336,6 @@ uhci_timeout_task(void *addr) > splx(s); > } > > -/* > - * Wait here until controller claims to have an interrupt. > - * Then call uhci_intr and return. Use timeout to avoid waiting > - * too long. > - * Only used during boot when interrupts are not enabled yet. > - */ > -void > -uhci_waitintr(struct uhci_softc *sc, struct usbd_xfer *xfer) > -{ > - int timo; > - u_int32_t intrs; > - > - xfer->status = USBD_IN_PROGRESS; > - for (timo = xfer->timeout; timo >= 0; timo--) { > - usb_delay_ms(&sc->sc_bus, 1); > - if (sc->sc_bus.dying) > - break; > - intrs = UREAD2(sc, UHCI_STS) & UHCI_STS_ALLINTRS; > - DPRINTFN(15,("uhci_waitintr: 0x%04x\n", intrs)); > - if (intrs) { > - uhci_intr1(sc); > - if (xfer->status != USBD_IN_PROGRESS) > - return; > - } > - } > - > - /* Timeout */ > - DPRINTF(("uhci_waitintr: timeout\n")); > - xfer->status = USBD_TIMEOUT; > - usb_transfer_complete(xfer); > -} > - > void > uhci_poll(struct usbd_bus *bus) > { > @@ -1707,9 +1674,6 @@ uhci_device_bulk_start(struct usbd_xfer > } > #endif > > - if (sc->sc_bus.use_polling) > - uhci_waitintr(sc, xfer); > - > return (USBD_IN_PROGRESS); > } > > @@ -1841,9 +1805,6 @@ uhci_device_ctrl_start(struct usbd_xfer > if (err) > return (err); > > - if (sc->sc_bus.use_polling) > - uhci_waitintr(sc, xfer); > - > return (USBD_IN_PROGRESS); > } > > @@ -1932,9 +1893,6 @@ uhci_device_intr_start(struct usbd_xfer > } > #endif > > - if (sc->sc_bus.use_polling) > - uhci_waitintr(sc, xfer); > - > return (USBD_IN_PROGRESS); > } > > @@ -2253,11 +2211,6 @@ uhci_device_isoc_start(struct usbd_xfer > uhci_add_intr_list(sc, ux); > > splx(s); > - > - if (sc->sc_bus.use_polling) { > - DPRINTF(("Starting uhci isoc xfer with polling. Bad idea?\n")); > - uhci_waitintr(sc, xfer); > - } > > return (USBD_IN_PROGRESS); > } > Index: xhci.c > =================================================================== > RCS file: /cvs/src/sys/dev/usb/xhci.c,v > retrieving revision 1.70 > diff -u -p -r1.70 xhci.c > --- xhci.c 8 Nov 2016 10:31:30 -0000 1.70 > +++ xhci.c 9 Mar 2017 13:20:11 -0000 > @@ -75,7 +75,6 @@ struct xhci_pipe { > > int xhci_reset(struct xhci_softc *); > int xhci_intr1(struct xhci_softc *); > -void xhci_waitintr(struct xhci_softc *, struct usbd_xfer *); > void xhci_event_dequeue(struct xhci_softc *); > void xhci_event_xfer(struct xhci_softc *, uint64_t, uint32_t, uint32_t); > void xhci_event_command(struct xhci_softc *, uint64_t); > @@ -634,26 +633,6 @@ xhci_poll(struct usbd_bus *bus) > } > > void > -xhci_waitintr(struct xhci_softc *sc, struct usbd_xfer *xfer) > -{ > - int timo; > - > - for (timo = xfer->timeout; timo >= 0; timo--) { > - usb_delay_ms(&sc->sc_bus, 1); > - if (sc->sc_bus.dying) > - break; > - > - if (xfer->status != USBD_IN_PROGRESS) > - return; > - > - xhci_intr1(sc); > - } > - > - xfer->status = USBD_TIMEOUT; > - usb_transfer_complete(xfer); > -} > - > -void > xhci_softintr(void *v) > { > struct xhci_softc *sc = v; > @@ -2525,10 +2504,7 @@ xhci_device_ctrl_start(struct usbd_xfer > XDWRITE4(sc, XHCI_DOORBELL(xp->slot), xp->dci); > > xfer->status = USBD_IN_PROGRESS; > - > - if (sc->sc_bus.use_polling) > - xhci_waitintr(sc, xfer); > - else if (xfer->timeout) { > + if (xfer->timeout && !sc->sc_bus.use_polling) { > timeout_del(&xfer->timeout_handle); > timeout_set(&xfer->timeout_handle, xhci_timeout, xfer); > timeout_add_msec(&xfer->timeout_handle, xfer->timeout); > @@ -2645,10 +2621,7 @@ xhci_device_generic_start(struct usbd_xf > XDWRITE4(sc, XHCI_DOORBELL(xp->slot), xp->dci); > > xfer->status = USBD_IN_PROGRESS; > - > - if (sc->sc_bus.use_polling) > - xhci_waitintr(sc, xfer); > - else if (xfer->timeout) { > + if (xfer->timeout && !sc->sc_bus.use_polling) { > timeout_del(&xfer->timeout_handle); > timeout_set(&xfer->timeout_handle, xhci_timeout, xfer); > timeout_add_msec(&xfer->timeout_handle, xfer->timeout); > Index: dwc2/dwc2.c > =================================================================== > RCS file: /cvs/src/sys/dev/usb/dwc2/dwc2.c,v > retrieving revision 1.41 > diff -u -p -r1.41 dwc2.c > --- dwc2/dwc2.c 16 Feb 2017 14:09:00 -0000 1.41 > +++ dwc2/dwc2.c 9 Mar 2017 13:26:13 -0000 > @@ -94,7 +94,6 @@ STATIC usbd_status dwc2_open(struct usbd > STATIC int dwc2_setaddr(struct usbd_device *, int); > STATIC void dwc2_poll(struct usbd_bus *); > STATIC void dwc2_softintr(void *); > -STATIC void dwc2_waitintr(struct dwc2_softc *, struct usbd_xfer *); > > #if 0 > STATIC usbd_status dwc2_allocm(struct usbd_bus *, struct usb_dma *, > uint32_t); > @@ -406,38 +405,6 @@ dwc2_softintr(void *v) > } > > STATIC void > -dwc2_waitintr(struct dwc2_softc *sc, struct usbd_xfer *xfer) > -{ > - struct dwc2_hsotg *hsotg = sc->sc_hsotg; > - uint32_t intrs; > - int timo; > - > - xfer->status = USBD_IN_PROGRESS; > - for (timo = xfer->timeout; timo >= 0; timo--) { > - usb_delay_ms(&sc->sc_bus, 1); > - if (sc->sc_dying) > - break; > - intrs = dwc2_read_core_intr(hsotg); > - > - DPRINTFN(15, "0x%08x\n", intrs); > - > - if (intrs) { > - mtx_enter(&hsotg->lock); > - dwc2_interrupt(sc); > - mtx_leave(&hsotg->lock); > - if (xfer->status != USBD_IN_PROGRESS) > - return; > - } > - } > - > - /* Timeout */ > - DPRINTF("timeout\n"); > - > - xfer->status = USBD_TIMEOUT; > - usb_transfer_complete(xfer); > -} > - > -STATIC void > dwc2_timeout(void *addr) > { > struct usbd_xfer *xfer = addr; > @@ -987,7 +954,6 @@ dwc2_device_ctrl_transfer(struct usbd_xf > STATIC usbd_status > dwc2_device_ctrl_start(struct usbd_xfer *xfer) > { > - struct dwc2_softc *sc = DWC2_XFER2SC(xfer); > usbd_status err; > > DPRINTF("\n"); > @@ -995,9 +961,6 @@ dwc2_device_ctrl_start(struct usbd_xfer > xfer->status = USBD_IN_PROGRESS; > err = dwc2_device_start(xfer); > > - if (sc->sc_bus.use_polling) > - dwc2_waitintr(sc, xfer); > - > return err; > } > > @@ -1044,7 +1007,6 @@ dwc2_device_bulk_transfer(struct usbd_xf > STATIC usbd_status > dwc2_device_bulk_start(struct usbd_xfer *xfer) > { > - struct dwc2_softc *sc = DWC2_XFER2SC(xfer); > usbd_status err; > > DPRINTF("xfer=%p\n", xfer); > @@ -1052,9 +1014,6 @@ dwc2_device_bulk_start(struct usbd_xfer > xfer->status = USBD_IN_PROGRESS; > err = dwc2_device_start(xfer); > > - if (sc->sc_bus.use_polling) > - dwc2_waitintr(sc, xfer); > - > return err; > } > > @@ -1103,15 +1062,10 @@ dwc2_device_intr_transfer(struct usbd_xf > STATIC usbd_status > dwc2_device_intr_start(struct usbd_xfer *xfer) > { > - struct dwc2_pipe *dpipe = DWC2_XFER2DPIPE(xfer) > - struct dwc2_softc *sc = DWC2_DPIPE2SC(dpipe); > usbd_status err; > > xfer->status = USBD_IN_PROGRESS; > err = dwc2_device_start(xfer); > - > - if (sc->sc_bus.use_polling) > - dwc2_waitintr(sc, xfer); > > return err; > } > >