Date: Sat, 29 Dec 2012 12:13:39 +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-9@freebsd.org Subject: svn commit: r244814 - stable/9/sys/dev/usb/storage Message-ID: <201212291213.qBTCDd0v020391@svn.freebsd.org>
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Author: hselasky Date: Sat Dec 29 12:13:38 2012 New Revision: 244814 URL: http://svnweb.freebsd.org/changeset/base/244814 Log: MFC r244491: Add support for throttling UMASS. Mostly useful for debugging purposes. Modified: stable/9/sys/dev/usb/storage/umass.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/dev/ (props changed) Modified: stable/9/sys/dev/usb/storage/umass.c ============================================================================== --- stable/9/sys/dev/usb/storage/umass.c Sat Dec 29 12:10:41 2012 (r244813) +++ stable/9/sys/dev/usb/storage/umass.c Sat Dec 29 12:13:38 2012 (r244814) @@ -163,12 +163,16 @@ __FBSDID("$FreeBSD$"); #define UDMASS_CBI 0x00400000 /* CBI transfers */ #define UDMASS_WIRE (UDMASS_BBB|UDMASS_CBI) #define UDMASS_ALL 0xffff0000 /* all of the above */ -static int umass_debug = 0; +static int umass_debug; +static int umass_throttle; SYSCTL_NODE(_hw_usb, OID_AUTO, umass, CTLFLAG_RW, 0, "USB umass"); SYSCTL_INT(_hw_usb_umass, OID_AUTO, debug, CTLFLAG_RW | CTLFLAG_TUN, &umass_debug, 0, "umass debug level"); TUNABLE_INT("hw.usb.umass.debug", &umass_debug); +SYSCTL_INT(_hw_usb_umass, OID_AUTO, throttle, CTLFLAG_RW | CTLFLAG_TUN, + &umass_throttle, 0, "Forced delay between commands in milliseconds"); +TUNABLE_INT("hw.usb.umass.throttle", &umass_throttle); #else #define DIF(...) do { } while (0) #define DPRINTF(...) do { } while (0) @@ -881,7 +885,7 @@ umass_attach(device_t dev) struct usb_attach_arg *uaa = device_get_ivars(dev); struct umass_probe_proto temp = umass_probe_proto(dev, uaa); struct usb_interface_descriptor *id; - int32_t err; + int err; /* * NOTE: the softc struct is cleared in device_set_driver. @@ -994,6 +998,24 @@ umass_attach(device_t dev) "transfers, %s\n", usbd_errstr(err)); goto detach; } +#ifdef USB_DEBUG + if (umass_throttle > 0) { + uint8_t x; + int iv; + + iv = umass_throttle; + + if (iv < 1) + iv = 1; + else if (iv > 8000) + iv = 8000; + + for (x = 0; x != UMASS_T_MAX; x++) { + if (sc->sc_xfer[x] != NULL) + usbd_xfer_set_interval(sc->sc_xfer[x], iv); + } + } +#endif sc->sc_transform = (sc->sc_proto & UMASS_PROTO_SCSI) ? &umass_scsi_transform : (sc->sc_proto & UMASS_PROTO_UFI) ? &umass_ufi_transform :
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