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BranchCommit messageAuthorAge
archive/unc-master-3.0P-FP: fix BUG_ON releated to priority inheritanceBjoern Brandenburg13 years
archived-2013.1uncachedev: mmap memory that is not cached by CPUsGlenn Elliott12 years
archived-private-masterMerge branch 'wip-2.6.34' into old-private-masterAndrea Bastoni15 years
archived-semi-partMerge branch 'wip-semi-part' of ssh://cvs/cvs/proj/litmus/repo/litmus2010 int...Andrea Bastoni15 years
demoFurther refinementsJonathan Herman14 years
ecrts-pgm-finalMerge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...Glenn Elliott12 years
ecrts14-pgm-finalMerge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...Glenn Elliott12 years
gpusync-rtss12Final GPUSync implementation.Glenn Elliott12 years
gpusync/stagingRename IKGLP R2DGLP.Glenn Elliott12 years
linux-tipMerge branch 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/p...Linus Torvalds15 years
litmus2008-patch-seriesadd i386 feather-trace implementationBjoern B. Brandenburg16 years
masterPSN-EDF: use inferred_sporadic_job_release_atBjoern Brandenburg9 years
pgmmake it compileGlenn Elliott12 years
prop/litmus-signalsInfrastructure for Litmus signals.Glenn Elliott13 years
prop/robust-tie-breakFixed bug in edf_higher_prio().Glenn Elliott13 years
stagingFix tracepoint compilation errorFelipe Cerqueira13 years
test9/23/2016Namhoon Kim9 years
tracing-develTest kernel tracing events capabilitiesAndrea Bastoni16 years
v2.6.34-with-arm-patchessmsc911x: Add spinlocks around registers accessCatalin Marinas15 years
v2015.1Add ARM syscall def for get_current_budgetBjoern Brandenburg10 years
wip-2011.2-bbbLitmus core: simplify np-section protocolBjoern B. Brandenburg14 years
wip-2011.2-bbb-traceRefactor sched_trace_log_message() -> debug_trace_log_message()Andrea Bastoni14 years
wip-2012.3-gpuSOBLIV draining support for C-EDF.Glenn Elliott12 years
wip-2012.3-gpu-preportpick up last C-RM fileGlenn Elliott12 years
wip-2012.3-gpu-rtss13Fix critical bug in GPU tracker.Glenn Elliott12 years
wip-2012.3-gpu-sobliv-budget-w-ksharkProper sobliv draining and many bug fixes.Glenn Elliott12 years
wip-aedzl-finalMake it easier to compile AEDZL interfaces in liblitmus.Glenn Elliott15 years
wip-aedzl-revisedAdd sched_trace data for Apative EDZLGlenn Elliott15 years
wip-arbit-deadlineFix compilation bug.Glenn Elliott13 years
wip-aux-tasksDescription of refined aux task inheritance.Glenn Elliott13 years
wip-bbbGSN-EDF & Core: improve debug TRACE'ing for NP sectionsBjoern B. Brandenburg14 years
wip-bbb-prio-donuse correct timestampBjoern B. Brandenburg14 years
wip-better-breakImplement hash-based EDF tie-breaking.Glenn Elliott13 years
wip-binary-heapMake C-EDF work with simplified binheap_deleteGlenn Elliott13 years
wip-budgetAdded support for choices in budget policy enforcement.Glenn Elliott15 years
wip-colorSummarize schedulability with final recordJonathan Herman13 years
wip-color-jlhsched_color: Fixed two bugs causing crashing on experiment restart and a rare...Jonathan Herman13 years
wip-d10-hz1000Enable HZ=1000 on District 10Bjoern B. Brandenburg15 years
wip-default-clusteringFeature: Make default C-EDF clustering compile-time configurable.Glenn Elliott15 years
wip-dissipation-jericksoUpdate from 2.6.36 to 2.6.36.4Jeremy Erickson11 years
wip-dissipation2-jericksoUpdate 2.6.36 to 2.6.36.4Jeremy Erickson11 years
wip-ecrts14-pgmMerge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...Glenn Elliott12 years
wip-edf-hsblast tested versionJonathan Herman14 years
wip-edf-osLookup table EDF-osJeremy Erickson12 years
wip-edf-tie-breakMerge branch 'wip-edf-tie-break' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus...Glenn Elliott13 years
wip-edzl-critiqueUse hr_timer's active checks instead of having own flag.Glenn Elliott15 years
wip-edzl-finalImplementation of the EDZL scheduler.Glenn Elliott15 years
wip-edzl-revisedClean up comments.Glenn Elliott15 years
wip-eventsAdded support for tracing arbitrary actions.Jonathan Herman15 years
wip-extra-debugDBG: add additional tracingBjoern B. Brandenburg15 years
wip-fix-switch-jericksoAttempt to fix race condition with plugin switchingJeremy Erickson15 years
wip-fix3sched: show length of runqueue clock deactivation in /proc/sched_debugBjoern B. Brandenburg15 years
wip-fmlp-dequeueImprove FMLP queue management.Glenn Elliott14 years
wip-ft-irq-flagFeather-Trace: keep track of interrupt-related interference.Bjoern B. Brandenburg14 years
wip-gpu-cleanupEnable sched_trace log injection from userspaceGlenn Elliott13 years
wip-gpu-interruptsRemove option for threading of all softirqs.Glenn Elliott14 years
wip-gpu-rtas12Generalized GPU cost predictors + EWMA. (untested)Glenn Elliott13 years
wip-gpu-rtss12Final GPUSync implementation.Glenn Elliott13 years
wip-gpu-rtss12-srpexperimental changes to support GPUs under SRPGlenn Elliott13 years
wip-gpusync-mergeCleanup priority tracking for budget enforcement.Glenn Elliott11 years
wip-ikglpMove RSM and IKGLP imp. to own .c filesGlenn Elliott13 years
wip-k-fmlpMerge branch 'mpi-master' into wip-k-fmlpGlenn Elliott14 years
wip-kernel-coloringAdded recolor syscallNamhoon Kim7 years
wip-kernthreadsKludge work-queue processing into klitirqd.Glenn Elliott15 years
wip-klmirqd-to-auxAllow klmirqd threads to be given names.Glenn Elliott13 years
wip-ksharkMerge branch 'mpi-staging' into wip-ksharkJonathan Herman13 years
wip-litmus-3.2Merge commit 'v3.2' into litmus-stagingAndrea Bastoni13 years
wip-litmus2011.2Cleanup: Coding conformance for affinity stuff.Glenn Elliott14 years
wip-litmus3.0-2011.2Feather-Trace: keep track of interrupt-related interference.Bjoern B. Brandenburg14 years
wip-master-2.6.33-rtAvoid deadlock when switching task policy to BACKGROUND (ugly)Andrea Bastoni15 years
wip-mcRemoved ARM-specific hacks which disabled less common mixed-criticality featu...Jonathan Herman12 years
wip-mc-bipasaMC-EDF addedbipasa chattopadhyay13 years
wip-mc-jericksoSplit C/D queuesJeremy Erickson15 years
wip-mc2-cache-slackManually patched mc^2 related codeMing Yang10 years
wip-mcrit-maccosmeticMac Mollison15 years
wip-merge-3.0Prevent Linux to send IPI and queue tasks on remote CPUs.Andrea Bastoni14 years
wip-merge-v3.0Prevent Linux to send IPI and queue tasks on remote CPUs.Andrea Bastoni14 years
wip-migration-affinityNULL affinity dereference in C-EDF.Glenn Elliott14 years
wip-mmap-uncacheshare branch with othersGlenn Elliott13 years
wip-modechangeRTSS 2017 submissionNamhoon Kim8 years
wip-nested-lockingAppears to be working.Bryan Ward12 years
wip-omlp-gedfFirst implementation of G-OMLP.Glenn Elliott15 years
wip-paiSome cleanup of PAIGlenn Elliott14 years
wip-percore-lib9/21/2016Namhoon Kim9 years
wip-performanceCONFIG_DONT_PREEMPT_ON_TIE: Don't preeempt a scheduled task on priority tie.Glenn Elliott14 years
wip-pgmAdd PGM support to C-FLGlenn Elliott12 years
wip-pgm-splitFirst draft of C-FL-splitNamhoon Kim12 years
wip-pm-ovdAdd preemption-and-migration overhead tracing supportAndrea Bastoni15 years
wip-prio-inhP-EDF updated to use the generic pi framework.Glenn Elliott15 years
wip-prioq-dglBUG FIX: Support DGLs with PRIOQ_MUTEXGlenn Elliott13 years
wip-refactored-gedfGeneralizd architecture for GEDF-style scheduelrs to reduce code redundancy.Glenn Elliott15 years
wip-release-master-fixbugfix: release master CPU must signal task was pickedBjoern B. Brandenburg14 years
wip-robust-tie-breakEDF priority tie-breaks.Glenn Elliott13 years
wip-rt-ksharkMove task time accounting into the complete_job method.Jonathan Herman13 years
wip-rtas12-pgmScheduling of PGM jobs.Glenn Elliott13 years
wip-semi-partFix compile error with newer GCCJeremy Erickson12 years
wip-semi-part-edfos-jericksoUse initial CPU set by clientJeremy Erickson12 years
wip-shared-libTODO: Fix condition checks in replicate_page_move_mapping()Namhoon Kim9 years
wip-shared-lib2RTAS 2017 Submission ver.Namhoon Kim9 years
wip-shared-memInitial commit for shared libraryNamhoon Kim9 years
wip-splitting-jericksoFix release behaviorJeremy Erickson13 years
wip-splitting-omlp-jericksoBjoern's Dissertation Code with Priority DonationJeremy Erickson13 years
wip-stage-binheapAn efficient binary heap implementation.Glenn Elliott13 years
wip-sun-portDynamic memory allocation and clean exit for FeatherTraceChristopher Kenna15 years
wip-timer-tracebugfix: C-EDF, clear scheduled field of the correct CPU upon task_exitAndrea Bastoni15 years
wip-tracepointsAdd kernel-style events for sched_trace_XXX() functionsAndrea Bastoni14 years
 
TagDownloadAuthorAge
2015.1commit 8e51b37822...Bjoern Brandenburg10 years
2013.1commit bcaacec1ca...Glenn Elliott12 years
2012.3commit c158b5fbe4...Jonathan Herman13 years
2012.2commit b53c479a0f...Glenn Elliott13 years
2012.1commit 83b11ea1c6...Bjoern B. Brandenburg14 years
rtas12-mc-beta-expcommit 8e236ee20f...Christopher Kenna14 years
2011.1commit d11808b5c6...Christopher Kenna15 years
v2.6.37-rc4commit e8a7e48bb2...Linus Torvalds15 years
v2.6.37-rc3commit 3561d43fd2...Linus Torvalds15 years
v2.6.37-rc2commit e53beacd23...Linus Torvalds15 years
v2.6.37-rc1commit c8ddb2713c...Linus Torvalds15 years
v2.6.36commit f6f94e2ab1...Linus Torvalds15 years
2010.2commit 5c5456402d...Bjoern B. Brandenburg15 years
v2.6.36-rc8commit cd07202cc8...Linus Torvalds15 years
v2.6.36-rc7commit cb655d0f3d...Linus Torvalds15 years
v2.6.36-rc6commit 899611ee7d...Linus Torvalds15 years
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2010.1commit 7c1ff4c544...Andrea Bastoni15 years
v2.6.34commit e40152ee1e...Linus Torvalds15 years
v2.6.33.4commit 4640b4e7d9...Greg Kroah-Hartman15 years
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v2.6.15-rc3commit 624f54be20...Linus Torvalds20 years
v2.6.15-rc2commit 3bedff1d73...Linus Torvalds20 years
v2.6.15-rc1commit cd52d1ee9a...Linus Torvalds20 years
v2.6.14commit 741b2252a5...Linus Torvalds20 years
v2.6.14-rc5commit 93918e9afc...Linus Torvalds20 years
v2.6.14-rc4commit 907a426179...Linus Torvalds20 years
v2.6.14-rc3commit 1c9426e8a5...Linus Torvalds20 years
v2.6.14-rc2commit 676d55ae30...Linus Torvalds20 years
v2.6.14-rc1commit 2f4ba45a75...Linus Torvalds20 years
v2.6.13commit 02b3e4e2d7...Linus Torvalds20 years
v2.6.13-rc7commit 0572e3da3f...Linus Torvalds20 years
v2.6.13-rc6commit 6fc32179de...Linus Torvalds20 years
v2.6.13-rc5commit 9a351e30d7...Linus Torvalds20 years
v2.6.13-rc4commit 6395352334...Linus Torvalds20 years
v2.6.11tree c39ae07f39...
v2.6.11-treetree c39ae07f39...
v2.6.12commit 9ee1c939d1...
v2.6.12-rc2commit 1da177e4c3...
v2.6.12-rc3commit a2755a80f4...
v2.6.12-rc4commit 88d7bd8cb9...
v2.6.12-rc5commit 2a24ab628a...
v2.6.12-rc6commit 7cef5677ef...
v2.6.13-rc1commit 4c91aedb75...
v2.6.13-rc2commit a18bcb7450...
v2.6.13-rc3commit c32511e271...
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-12 02:52:03 -0400
ngth = len; // always USB_DIR_IN, toward host memcpy (ubuf, bufp, len); /* report whether RH hardware supports remote wakeup */ if (patch_wakeup && len > offsetof (struct usb_config_descriptor, bmAttributes)) ((struct usb_config_descriptor *)ubuf)->bmAttributes |= USB_CONFIG_ATT_WAKEUP; } /* any errors get returned through the urb completion */ local_irq_save (flags); spin_lock (&urb->lock); if (urb->status == -EINPROGRESS) urb->status = status; spin_unlock (&urb->lock); usb_hcd_giveback_urb (hcd, urb, NULL); local_irq_restore (flags); return 0; } /*-------------------------------------------------------------------------*/ /* * Root Hub interrupt transfers are synthesized with a timer. * Completions are called in_interrupt() but not in_irq(). * * Note: some root hubs (including common UHCI based designs) can't * correctly issue port change IRQs. They're the ones that _need_ a * timer; most other root hubs don't. Some systems could save a * lot of battery power by eliminating these root hub timer IRQs. */ static void rh_report_status (unsigned long ptr); static int rh_status_urb (struct usb_hcd *hcd, struct urb *urb) { int len = 1 + (urb->dev->maxchild / 8); /* rh_timer protected by hcd_data_lock */ if (hcd->rh_timer.data || urb->transfer_buffer_length < len) { dev_dbg (hcd->self.controller, "not queuing rh status urb, stat %d\n", urb->status); return -EINVAL; } init_timer (&hcd->rh_timer); hcd->rh_timer.function = rh_report_status; hcd->rh_timer.data = (unsigned long) urb; /* USB 2.0 spec says 256msec; this is close enough */ hcd->rh_timer.expires = jiffies + HZ/4; add_timer (&hcd->rh_timer); urb->hcpriv = hcd; /* nonzero to indicate it's queued */ return 0; } /* timer callback */ static void rh_report_status (unsigned long ptr) { struct urb *urb; struct usb_hcd *hcd; int length = 0; unsigned long flags; urb = (struct urb *) ptr; local_irq_save (flags); spin_lock (&urb->lock); /* do nothing if the urb's been unlinked */ if (!urb->dev || urb->status != -EINPROGRESS || (hcd = urb->dev->bus->hcpriv) == NULL) { spin_unlock (&urb->lock); local_irq_restore (flags); return; } /* complete the status urb, or retrigger the timer */ spin_lock (&hcd_data_lock); if (urb->dev->state == USB_STATE_CONFIGURED) { length = hcd->driver->hub_status_data ( hcd, urb->transfer_buffer); if (length > 0) { hcd->rh_timer.data = 0; urb->actual_length = length; urb->status = 0; urb->hcpriv = NULL; } else mod_timer (&hcd->rh_timer, jiffies + HZ/4); } spin_unlock (&hcd_data_lock); spin_unlock (&urb->lock); /* local irqs are always blocked in completions */ if (length > 0) usb_hcd_giveback_urb (hcd, urb, NULL); local_irq_restore (flags); } /*-------------------------------------------------------------------------*/ static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) { if (usb_pipeint (urb->pipe)) { int retval; unsigned long flags; spin_lock_irqsave (&hcd_data_lock, flags); retval = rh_status_urb (hcd, urb); spin_unlock_irqrestore (&hcd_data_lock, flags); return retval; } if (usb_pipecontrol (urb->pipe)) return rh_call_control (hcd, urb); else return -EINVAL; } /*-------------------------------------------------------------------------*/ static int usb_rh_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) { unsigned long flags; /* note: always a synchronous unlink */ if ((unsigned long) urb == hcd->rh_timer.data) { del_timer_sync (&hcd->rh_timer); hcd->rh_timer.data = 0; local_irq_save (flags); urb->hcpriv = NULL; usb_hcd_giveback_urb (hcd, urb, NULL); local_irq_restore (flags); } else if (usb_pipeendpoint(urb->pipe) == 0) { spin_lock_irq(&urb->lock); /* from usb_kill_urb */ ++urb->reject; spin_unlock_irq(&urb->lock); wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0); spin_lock_irq(&urb->lock); --urb->reject; spin_unlock_irq(&urb->lock); } else return -EINVAL; return 0; } /*-------------------------------------------------------------------------*/ /* exported only within usbcore */ struct usb_bus *usb_bus_get (struct usb_bus *bus) { struct class_device *tmp; if (!bus) return NULL; tmp = class_device_get(&bus->class_dev); if (tmp) return to_usb_bus(tmp); else return NULL; } /* exported only within usbcore */ void usb_bus_put (struct usb_bus *bus) { if (bus) class_device_put(&bus->class_dev); } /*-------------------------------------------------------------------------*/ static void usb_host_release(struct class_device *class_dev) { struct usb_bus *bus = to_usb_bus(class_dev); if (bus->release) bus->release(bus); } static struct class usb_host_class = { .name = "usb_host", .release = &usb_host_release, }; int usb_host_init(void) { return class_register(&usb_host_class); } void usb_host_cleanup(void) { class_unregister(&usb_host_class); } /** * usb_bus_init - shared initialization code * @bus: the bus structure being initialized * * This code is used to initialize a usb_bus structure, memory for which is * separately managed. */ static void usb_bus_init (struct usb_bus *bus) { memset (&bus->devmap, 0, sizeof(struct usb_devmap)); bus->devnum_next = 1; bus->root_hub = NULL; bus->hcpriv = NULL; bus->busnum = -1; bus->bandwidth_allocated = 0; bus->bandwidth_int_reqs = 0; bus->bandwidth_isoc_reqs = 0; INIT_LIST_HEAD (&bus->bus_list); class_device_initialize(&bus->class_dev); bus->class_dev.class = &usb_host_class; } /** * usb_alloc_bus - creates a new USB host controller structure * @op: pointer to a struct usb_operations that this bus structure should use * Context: !in_interrupt() * * Creates a USB host controller bus structure with the specified * usb_operations and initializes all the necessary internal objects. * * If no memory is available, NULL is returned. * * The caller should call usb_put_bus() when it is finished with the structure. */ struct usb_bus *usb_alloc_bus (struct usb_operations *op) { struct usb_bus *bus; bus = kmalloc (sizeof *bus, GFP_KERNEL); if (!bus) return NULL; memset(bus, 0, sizeof(struct usb_bus)); usb_bus_init (bus); bus->op = op; return bus; } /*-------------------------------------------------------------------------*/ /** * usb_register_bus - registers the USB host controller with the usb core * @bus: pointer to the bus to register * Context: !in_interrupt() * * Assigns a bus number, and links the controller into usbcore data * structures so that it can be seen by scanning the bus list. */ static int usb_register_bus(struct usb_bus *bus) { int busnum; int retval; down (&usb_bus_list_lock); busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); if (busnum < USB_MAXBUS) { set_bit (busnum, busmap.busmap); bus->busnum = busnum; } else { printk (KERN_ERR "%s: too many buses\n", usbcore_name); up(&usb_bus_list_lock); return -E2BIG; } snprintf(bus->class_dev.class_id, BUS_ID_SIZE, "usb%d", busnum); bus->class_dev.dev = bus->controller; retval = class_device_add(&bus->class_dev); if (retval) { clear_bit(busnum, busmap.busmap); up(&usb_bus_list_lock); return retval; } /* Add it to the local list of buses */ list_add (&bus->bus_list, &usb_bus_list); up (&usb_bus_list_lock); usbfs_add_bus (bus); usbmon_notify_bus_add (bus); dev_info (bus->controller, "new USB bus registered, assigned bus number %d\n", bus->busnum); return 0; } /** * usb_deregister_bus - deregisters the USB host controller * @bus: pointer to the bus to deregister * Context: !in_interrupt() * * Recycles the bus number, and unlinks the controller from usbcore data * structures so that it won't be seen by scanning the bus list. */ static void usb_deregister_bus (struct usb_bus *bus) { dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); /* * NOTE: make sure that all the devices are removed by the * controller code, as well as having it call this when cleaning * itself up */ down (&usb_bus_list_lock); list_del (&bus->bus_list); up (&usb_bus_list_lock); usbmon_notify_bus_remove (bus); usbfs_remove_bus (bus); clear_bit (bus->busnum, busmap.busmap); class_device_del(&bus->class_dev); } /** * usb_hcd_register_root_hub - called by HCD to register its root hub * @usb_dev: the usb root hub device to be registered. * @hcd: host controller for this root hub * * The USB host controller calls this function to register the root hub * properly with the USB subsystem. It sets up the device properly in * the device tree and stores the root_hub pointer in the bus structure, * then calls usb_new_device() to register the usb device. It also * assigns the root hub's USB address (always 1). */ int usb_hcd_register_root_hub (struct usb_device *usb_dev, struct usb_hcd *hcd) { struct device *parent_dev = hcd->self.controller; const int devnum = 1; int retval; /* hcd->driver->start() reported can_wakeup, probably with * assistance from board's boot firmware. * NOTE: normal devices won't enable wakeup by default. */ if (hcd->can_wakeup) dev_dbg (parent_dev, "supports USB remote wakeup\n"); hcd->remote_wakeup = hcd->can_wakeup; usb_dev->devnum = devnum; usb_dev->bus->devnum_next = devnum + 1; memset (&usb_dev->bus->devmap.devicemap, 0, sizeof usb_dev->bus->devmap.devicemap); set_bit (devnum, usb_dev->bus->devmap.devicemap); usb_set_device_state(usb_dev, USB_STATE_ADDRESS); down (&usb_bus_list_lock); usb_dev->bus->root_hub = usb_dev; usb_dev->ep0.desc.wMaxPacketSize = __constant_cpu_to_le16(64); retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); if (retval != sizeof usb_dev->descriptor) { usb_dev->bus->root_hub = NULL; up (&usb_bus_list_lock); dev_dbg (parent_dev, "can't read %s device descriptor %d\n", usb_dev->dev.bus_id, retval); return (retval < 0) ? retval : -EMSGSIZE; } usb_lock_device (usb_dev); retval = usb_new_device (usb_dev); usb_unlock_device (usb_dev); if (retval) { usb_dev->bus->root_hub = NULL; dev_err (parent_dev, "can't register root hub for %s, %d\n", usb_dev->dev.bus_id, retval); } up (&usb_bus_list_lock); if (retval == 0) { spin_lock_irq (&hcd_root_hub_lock); hcd->rh_registered = 1; spin_unlock_irq (&hcd_root_hub_lock); /* Did the HC die before the root hub was registered? */ if (hcd->state == HC_STATE_HALT) usb_hc_died (hcd); /* This time clean up */ } return retval; } EXPORT_SYMBOL_GPL(usb_hcd_register_root_hub); /*-------------------------------------------------------------------------*/ /** * usb_calc_bus_time - approximate periodic transaction time in nanoseconds * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} * @is_input: true iff the transaction sends data to the host * @isoc: true for isochronous transactions, false for interrupt ones * @bytecount: how many bytes in the transaction. * * Returns approximate bus time in nanoseconds for a periodic transaction. * See USB 2.0 spec section 5.11.3; only periodic transfers need to be * scheduled in software, this function is only used for such scheduling. */ long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) { unsigned long tmp; switch (speed) { case USB_SPEED_LOW: /* INTR only */ if (is_input) { tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); } else { tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); } case USB_SPEED_FULL: /* ISOC or INTR */ if (isoc) { tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); } else { tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; return (9107L + BW_HOST_DELAY + tmp); } case USB_SPEED_HIGH: /* ISOC or INTR */ // FIXME adjust for input vs output if (isoc) tmp = HS_USECS (bytecount); else tmp = HS_USECS_ISO (bytecount); return tmp; default: pr_debug ("%s: bogus device speed!\n", usbcore_name); return -1; } } EXPORT_SYMBOL (usb_calc_bus_time); /* * usb_check_bandwidth(): * * old_alloc is from host_controller->bandwidth_allocated in microseconds; * bustime is from calc_bus_time(), but converted to microseconds. * * returns <bustime in us> if successful, * or -ENOSPC if bandwidth request fails. * * FIXME: * This initial implementation does not use Endpoint.bInterval * in managing bandwidth allocation. * It probably needs to be expanded to use Endpoint.bInterval. * This can be done as a later enhancement (correction). * * This will also probably require some kind of * frame allocation tracking...meaning, for example, * that if multiple drivers request interrupts every 10 USB frames, * they don't all have to be allocated at * frame numbers N, N+10, N+20, etc. Some of them could be at * N+11, N+21, N+31, etc., and others at * N+12, N+22, N+32, etc. * * Similarly for isochronous transfers... * * Individual HCDs can schedule more directly ... this logic * is not correct for high speed transfers. */ int usb_check_bandwidth (struct usb_device *dev, struct urb *urb) { unsigned int pipe = urb->pipe; long bustime; int is_in = usb_pipein (pipe); int is_iso = usb_pipeisoc (pipe); int old_alloc = dev->bus->bandwidth_allocated; int new_alloc; bustime = NS_TO_US (usb_calc_bus_time (dev->speed, is_in, is_iso, usb_maxpacket (dev, pipe, !is_in))); if (is_iso) bustime /= urb->number_of_packets; new_alloc = old_alloc + (int) bustime; if (new_alloc > FRAME_TIME_MAX_USECS_ALLOC) { #ifdef DEBUG char *mode = #ifdef CONFIG_USB_BANDWIDTH ""; #else "would have "; #endif dev_dbg (&dev->dev, "usb_check_bandwidth %sFAILED: %d + %ld = %d usec\n", mode, old_alloc, bustime, new_alloc); #endif #ifdef CONFIG_USB_BANDWIDTH bustime = -ENOSPC; /* report error */ #endif } return bustime; } EXPORT_SYMBOL (usb_check_bandwidth); /** * usb_claim_bandwidth - records bandwidth for a periodic transfer * @dev: source/target of request * @urb: request (urb->dev == dev) * @bustime: bandwidth consumed, in (average) microseconds per frame * @isoc: true iff the request is isochronous * * Bus bandwidth reservations are recorded purely for diagnostic purposes. * HCDs are expected not to overcommit periodic bandwidth, and to record such * reservations whenever endpoints are added to the periodic schedule. * * FIXME averaging per-frame is suboptimal. Better to sum over the HCD's * entire periodic schedule ... 32 frames for OHCI, 1024 for UHCI, settable * for EHCI (256/512/1024 frames, default 1024) and have the bus expose how * large its periodic schedule is. */ void usb_claim_bandwidth (struct usb_device *dev, struct urb *urb, int bustime, int isoc) { dev->bus->bandwidth_allocated += bustime; if (isoc) dev->bus->bandwidth_isoc_reqs++; else dev->bus->bandwidth_int_reqs++; urb->bandwidth = bustime; #ifdef USB_BANDWIDTH_MESSAGES dev_dbg (&dev->dev, "bandwidth alloc increased by %d (%s) to %d for %d requesters\n", bustime, isoc ? "ISOC" : "INTR", dev->bus->bandwidth_allocated, dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); #endif } EXPORT_SYMBOL (usb_claim_bandwidth); /** * usb_release_bandwidth - reverses effect of usb_claim_bandwidth() * @dev: source/target of request * @urb: request (urb->dev == dev) * @isoc: true iff the request is isochronous * * This records that previously allocated bandwidth has been released. * Bandwidth is released when endpoints are removed from the host controller's * periodic schedule. */ void usb_release_bandwidth (struct usb_device *dev, struct urb *urb, int isoc) { dev->bus->bandwidth_allocated -= urb->bandwidth; if (isoc) dev->bus->bandwidth_isoc_reqs--; else dev->bus->bandwidth_int_reqs--; #ifdef USB_BANDWIDTH_MESSAGES dev_dbg (&dev->dev, "bandwidth alloc reduced by %d (%s) to %d for %d requesters\n", urb->bandwidth, isoc ? "ISOC" : "INTR", dev->bus->bandwidth_allocated, dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs); #endif urb->bandwidth = 0; } EXPORT_SYMBOL (usb_release_bandwidth); /*-------------------------------------------------------------------------*/ /* * Generic HC operations. */ /*-------------------------------------------------------------------------*/ static void urb_unlink (struct urb *urb) { unsigned long flags; /* Release any periodic transfer bandwidth */ if (urb->bandwidth) usb_release_bandwidth (urb->dev, urb, usb_pipeisoc (urb->pipe)); /* clear all state linking urb to this dev (and hcd) */ spin_lock_irqsave (&hcd_data_lock, flags); list_del_init (&urb->urb_list); spin_unlock_irqrestore (&hcd_data_lock, flags); usb_put_dev (urb->dev); } /* may be called in any context with a valid urb->dev usecount * caller surrenders "ownership" of urb * expects usb_submit_urb() to have sanity checked and conditioned all * inputs in the urb */ static int hcd_submit_urb (struct urb *urb, int mem_flags) { int status; struct usb_hcd *hcd = urb->dev->bus->hcpriv; struct usb_host_endpoint *ep; unsigned long flags; if (!hcd) return -ENODEV; usbmon_urb_submit(&hcd->self, urb); /* * Atomically queue the urb, first to our records, then to the HCD. * Access to urb->status is controlled by urb->lock ... changes on * i/o completion (normal or fault) or unlinking. */ // FIXME: verify that quiescing hc works right (RH cleans up) spin_lock_irqsave (&hcd_data_lock, flags); ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) [usb_pipeendpoint(urb->pipe)]; if (unlikely (!ep)) status = -ENOENT; else if (unlikely (urb->reject)) status = -EPERM; else switch (hcd->state) { case HC_STATE_RUNNING: case HC_STATE_RESUMING: usb_get_dev (urb->dev); list_add_tail (&urb->urb_list, &ep->urb_list); status = 0; break; default: status = -ESHUTDOWN; break; } spin_unlock_irqrestore (&hcd_data_lock, flags); if (status) { INIT_LIST_HEAD (&urb->urb_list); usbmon_urb_submit_error(&hcd->self, urb, status); return status; } /* increment urb's reference count as part of giving it to the HCD * (which now controls it). HCD guarantees that it either returns * an error or calls giveback(), but not both. */ urb = usb_get_urb (urb); atomic_inc (&urb->use_count); if (urb->dev == hcd->self.root_hub) { /* NOTE: requirement on hub callers (usbfs and the hub * driver, for now) that URBs' urb->transfer_buffer be * valid and usb_buffer_{sync,unmap}() not be needed, since * they could clobber root hub response data. */ status = rh_urb_enqueue (hcd, urb); goto done; } /* lower level hcd code should use *_dma exclusively, * unless it uses pio or talks to another transport. */ if (hcd->self.controller->dma_mask) { if (usb_pipecontrol (urb->pipe) && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) urb->setup_dma = dma_map_single ( hcd->self.controller, urb->setup_packet, sizeof (struct usb_ctrlrequest), DMA_TO_DEVICE); if (urb->transfer_buffer_length != 0 && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) urb->transfer_dma = dma_map_single ( hcd->self.controller, urb->transfer_buffer, urb->transfer_buffer_length, usb_pipein (urb->pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE); } status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags); done: if (unlikely (status)) { urb_unlink (urb); atomic_dec (&urb->use_count); if (urb->reject) wake_up (&usb_kill_urb_queue); usb_put_urb (urb); usbmon_urb_submit_error(&hcd->self, urb, status); } return status; } /*-------------------------------------------------------------------------*/ /* called in any context */ static int hcd_get_frame_number (struct usb_device *udev) { struct usb_hcd *hcd = (struct usb_hcd *)udev->bus->hcpriv; if (!HC_IS_RUNNING (hcd->state)) return -ESHUTDOWN; return hcd->driver->get_frame_number (hcd); } /*-------------------------------------------------------------------------*/ /* this makes the hcd giveback() the urb more quickly, by kicking it * off hardware queues (which may take a while) and returning it as * soon as practical. we've already set up the urb's return status, * but we can't know if the callback completed already. */ static int unlink1 (struct usb_hcd *hcd, struct urb *urb) { int value; if (urb->dev == hcd->self.root_hub) value = usb_rh_urb_dequeue (hcd, urb); else { /* The only reason an HCD might fail this call is if * it has not yet fully queued the urb to begin with. * Such failures should be harmless. */ value = hcd->driver->urb_dequeue (hcd, urb); } if (value != 0) dev_dbg (hcd->self.controller, "dequeue %p --> %d\n", urb, value); return value; } /* * called in any context * * caller guarantees urb won't be recycled till both unlink() * and the urb's completion function return */ static int hcd_unlink_urb (struct urb *urb, int status) { struct usb_host_endpoint *ep; struct usb_hcd *hcd = NULL; struct device *sys = NULL; unsigned long flags; struct list_head *tmp; int retval; if (!urb) return -EINVAL; if (!urb->dev || !urb->dev->bus) return -ENODEV; ep = (usb_pipein(urb->pipe) ? urb->dev->ep_in : urb->dev->ep_out) [usb_pipeendpoint(urb->pipe)]; if (!ep) return -ENODEV; /* * we contend for urb->status with the hcd core, * which changes it while returning the urb. * * Caller guaranteed that the urb pointer hasn't been freed, and * that it was submitted. But as a rule it can't know whether or * not it's already been unlinked ... so we respect the reversed * lock sequence needed for the usb_hcd_giveback_urb() code paths * (urb lock, then hcd_data_lock) in case some other CPU is now * unlinking it. */ spin_lock_irqsave (&urb->lock, flags); spin_lock (&hcd_data_lock); sys = &urb->dev->dev; hcd = urb->dev->bus->hcpriv; if (hcd == NULL) { retval = -ENODEV; goto done; } /* running ~= hc unlink handshake works (irq, timer, etc) * halted ~= no unlink handshake is needed * suspended, resuming == should never happen */ WARN_ON (!HC_IS_RUNNING (hcd->state) && hcd->state != HC_STATE_HALT); /* insist the urb is still queued */ list_for_each(tmp, &ep->urb_list) { if (tmp == &urb->urb_list) break; } if (tmp != &urb->urb_list) { retval = -EIDRM; goto done; } /* Any status except -EINPROGRESS means something already started to * unlink this URB from the hardware. So there's no more work to do. */ if (urb->status != -EINPROGRESS) { retval = -EBUSY; goto done; } /* IRQ setup can easily be broken so that USB controllers * never get completion IRQs ... maybe even the ones we need to * finish unlinking the initial failed usb_set_address() * or device descriptor fetch. */ if (!hcd->saw_irq && hcd->self.root_hub != urb->dev) { dev_warn (hcd->self.controller, "Unlink after no-IRQ? " "Controller is probably using the wrong IRQ." "\n"); hcd->saw_irq = 1; } urb->status = status; spin_unlock (&hcd_data_lock); spin_unlock_irqrestore (&urb->lock, flags); retval = unlink1 (hcd, urb); if (retval == 0) retval = -EINPROGRESS; return retval; done: spin_unlock (&hcd_data_lock); spin_unlock_irqrestore (&urb->lock, flags); if (retval != -EIDRM && sys && sys->driver) dev_dbg (sys, "hcd_unlink_urb %p fail %d\n", urb, retval); return retval; } /*-------------------------------------------------------------------------*/ /* disables the endpoint: cancels any pending urbs, then synchronizes with * the hcd to make sure all endpoint state is gone from hardware. use for * set_configuration, set_interface, driver removal, physical disconnect. * * example: a qh stored in ep->hcpriv, holding state related to endpoint * type, maxpacket size, toggle, halt status, and scheduling. */ static void hcd_endpoint_disable (struct usb_device *udev, struct usb_host_endpoint *ep) { struct usb_hcd *hcd; struct urb *urb; hcd = udev->bus->hcpriv; WARN_ON (!HC_IS_RUNNING (hcd->state) && hcd->state != HC_STATE_HALT); local_irq_disable (); /* FIXME move most of this into message.c as part of its * endpoint disable logic */ /* ep is already gone from udev->ep_{in,out}[]; no more submits */ rescan: spin_lock (&hcd_data_lock); list_for_each_entry (urb, &ep->urb_list, urb_list) { int tmp; /* another cpu may be in hcd, spinning on hcd_data_lock * to giveback() this urb. the races here should be * small, but a full fix needs a new "can't submit" * urb state. * FIXME urb->reject should allow that... */ if (urb->status != -EINPROGRESS) continue; usb_get_urb (urb); spin_unlock (&hcd_data_lock); spin_lock (&urb->lock); tmp = urb->status; if (tmp == -EINPROGRESS) urb->status = -ESHUTDOWN; spin_unlock (&urb->lock); /* kick hcd unless it's already returning this */ if (tmp == -EINPROGRESS) { tmp = urb->pipe; unlink1 (hcd, urb); dev_dbg (hcd->self.controller, "shutdown urb %p pipe %08x ep%d%s%s\n", urb, tmp, usb_pipeendpoint (tmp), (tmp & USB_DIR_IN) ? "in" : "out", ({ char *s; \ switch (usb_pipetype (tmp)) { \ case PIPE_CONTROL: s = ""; break; \ case PIPE_BULK: s = "-bulk"; break; \ case PIPE_INTERRUPT: s = "-intr"; break; \ default: s = "-iso"; break; \ }; s;})); } usb_put_urb (urb); /* list contents may have changed */ goto rescan; } spin_unlock (&hcd_data_lock); local_irq_enable (); /* synchronize with the hardware, so old configuration state * clears out immediately (and will be freed). */ might_sleep (); if (hcd->driver->endpoint_disable) hcd->driver->endpoint_disable (hcd, ep); } /*-------------------------------------------------------------------------*/ #ifdef CONFIG_USB_SUSPEND static int hcd_hub_suspend (struct usb_bus *bus) { struct usb_hcd *hcd; hcd = container_of (bus, struct usb_hcd, self); if (hcd->driver->hub_suspend) return hcd->driver->hub_suspend (hcd); return 0; } static int hcd_hub_resume (struct usb_bus *bus) { struct usb_hcd *hcd; hcd = container_of (bus, struct usb_hcd, self); if (hcd->driver->hub_resume) return hcd->driver->hub_resume (hcd); return 0; } /** * usb_hcd_resume_root_hub - called by HCD to resume its root hub * @hcd: host controller for this root hub * * The USB host controller calls this function when its root hub is * suspended (with the remote wakeup feature enabled) and a remote * wakeup request is received. It queues a request for khubd to * resume the root hub. */ void usb_hcd_resume_root_hub (struct usb_hcd *hcd) { unsigned long flags; spin_lock_irqsave (&hcd_root_hub_lock, flags); if (hcd->rh_registered) usb_resume_root_hub (hcd->self.root_hub); spin_unlock_irqrestore (&hcd_root_hub_lock, flags); } #else void usb_hcd_resume_root_hub (struct usb_hcd *hcd) { } #endif EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); /*-------------------------------------------------------------------------*/ #ifdef CONFIG_USB_OTG /** * usb_bus_start_enum - start immediate enumeration (for OTG) * @bus: the bus (must use hcd framework) * @port_num: 1-based number of port; usually bus->otg_port * Context: in_interrupt() * * Starts enumeration, with an immediate reset followed later by * khubd identifying and possibly configuring the device. * This is needed by OTG controller drivers, where it helps meet * HNP protocol timing requirements for starting a port reset. */ int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) { struct usb_hcd *hcd; int status = -EOPNOTSUPP; /* NOTE: since HNP can't start by grabbing the bus's address0_sem, * boards with root hubs hooked up to internal devices (instead of * just the OTG port) may need more attention to resetting... */ hcd = container_of (bus, struct usb_hcd, self); if (port_num && hcd->driver->start_port_reset) status = hcd->driver->start_port_reset(hcd, port_num); /* run khubd shortly after (first) root port reset finishes; * it may issue others, until at least 50 msecs have passed. */ if (status == 0) mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); return status; } EXPORT_SYMBOL (usb_bus_start_enum); #endif /*-------------------------------------------------------------------------*/ /* * usb_hcd_operations - adapts usb_bus framework to HCD framework (bus glue) */ static struct usb_operations usb_hcd_operations = { .get_frame_number = hcd_get_frame_number, .submit_urb = hcd_submit_urb, .unlink_urb = hcd_unlink_urb, .buffer_alloc = hcd_buffer_alloc, .buffer_free = hcd_buffer_free, .disable = hcd_endpoint_disable, #ifdef CONFIG_USB_SUSPEND .hub_suspend = hcd_hub_suspend, .hub_resume = hcd_hub_resume, #endif }; /*-------------------------------------------------------------------------*/ /** * usb_hcd_giveback_urb - return URB from HCD to device driver * @hcd: host controller returning the URB * @urb: urb being returned to the USB device driver. * @regs: pt_regs, passed down to the URB completion handler * Context: in_interrupt() * * This hands the URB from HCD to its USB device driver, using its * completion function. The HCD has freed all per-urb resources * (and is done using urb->hcpriv). It also released all HCD locks; * the device driver won't cause problems if it frees, modifies, * or resubmits this URB. */ void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb, struct pt_regs *regs) { int at_root_hub; at_root_hub = (urb->dev == hcd->self.root_hub); urb_unlink (urb); /* lower level hcd code should use *_dma exclusively */ if (hcd->self.controller->dma_mask && !at_root_hub) { if (usb_pipecontrol (urb->pipe) && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) dma_unmap_single (hcd->self.controller, urb->setup_dma, sizeof (struct usb_ctrlrequest), DMA_TO_DEVICE); if (urb->transfer_buffer_length != 0 && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) dma_unmap_single (hcd->self.controller, urb->transfer_dma, urb->transfer_buffer_length, usb_pipein (urb->pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE); } usbmon_urb_complete (&hcd->self, urb); /* pass ownership to the completion handler */ urb->complete (urb, regs); atomic_dec (&urb->use_count); if (unlikely (urb->reject)) wake_up (&usb_kill_urb_queue); usb_put_urb (urb); } EXPORT_SYMBOL (usb_hcd_giveback_urb); /*-------------------------------------------------------------------------*/ /** * usb_hcd_irq - hook IRQs to HCD framework (bus glue) * @irq: the IRQ being raised * @__hcd: pointer to the HCD whose IRQ is being signaled * @r: saved hardware registers * * If the controller isn't HALTed, calls the driver's irq handler. * Checks whether the controller is now dead. */ irqreturn_t usb_hcd_irq (int irq, void *__hcd, struct pt_regs * r) { struct usb_hcd *hcd = __hcd; int start = hcd->state; if (start == HC_STATE_HALT) return IRQ_NONE; if (hcd->driver->irq (hcd, r) == IRQ_NONE) return IRQ_NONE; hcd->saw_irq = 1; if (hcd->state != start && hcd->state == HC_STATE_HALT) usb_hc_died (hcd); return IRQ_HANDLED; } /*-------------------------------------------------------------------------*/ /** * usb_hc_died - report abnormal shutdown of a host controller (bus glue) * @hcd: pointer to the HCD representing the controller * * This is called by bus glue to report a USB host controller that died * while operations may still have been pending. It's called automatically * by the PCI glue, so only glue for non-PCI busses should need to call it. */ void usb_hc_died (struct usb_hcd *hcd) { unsigned long flags; dev_err (hcd->self.controller, "HC died; cleaning up\n"); spin_lock_irqsave (&hcd_root_hub_lock, flags); if (hcd->rh_registered) { /* make khubd clean up old urbs and devices */ usb_set_device_state (hcd->self.root_hub, USB_STATE_NOTATTACHED); usb_kick_khubd (hcd->self.root_hub); } spin_unlock_irqrestore (&hcd_root_hub_lock, flags); } EXPORT_SYMBOL_GPL (usb_hc_died); /*-------------------------------------------------------------------------*/ static void hcd_release (struct usb_bus *bus) { struct usb_hcd *hcd; hcd = container_of(bus, struct usb_hcd, self); kfree(hcd); } /** * usb_create_hcd - create and initialize an HCD structure * @driver: HC driver that will use this hcd * @dev: device for this HC, stored in hcd->self.controller * @bus_name: value to store in hcd->self.bus_name * Context: !in_interrupt() * * Allocate a struct usb_hcd, with extra space at the end for the * HC driver's private data. Initialize the generic members of the * hcd structure. * * If memory is unavailable, returns NULL. */ struct usb_hcd *usb_create_hcd (const struct hc_driver *driver, struct device *dev, char *bus_name) { struct usb_hcd *hcd; hcd = kcalloc(1, sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); if (!hcd) { dev_dbg (dev, "hcd alloc failed\n"); return NULL; } dev_set_drvdata(dev, hcd); usb_bus_init(&hcd->self); hcd->self.op = &usb_hcd_operations; hcd->self.hcpriv = hcd; hcd->self.release = &hcd_release; hcd->self.controller = dev; hcd->self.bus_name = bus_name; init_timer(&hcd->rh_timer); hcd->driver = driver; hcd->product_desc = (driver->product_desc) ? driver->product_desc : "USB Host Controller"; return hcd; } EXPORT_SYMBOL (usb_create_hcd); void usb_put_hcd (struct usb_hcd *hcd) { dev_set_drvdata(hcd->self.controller, NULL); usb_bus_put(&hcd->self); } EXPORT_SYMBOL (usb_put_hcd); /** * usb_add_hcd - finish generic HCD structure initialization and register * @hcd: the usb_hcd structure to initialize * @irqnum: Interrupt line to allocate * @irqflags: Interrupt type flags * * Finish the remaining parts of generic HCD initialization: allocate the * buffers of consistent memory, register the bus, request the IRQ line, * and call the driver's reset() and start() routines. */ int usb_add_hcd(struct usb_hcd *hcd, unsigned int irqnum, unsigned long irqflags) { int retval; dev_info(hcd->self.controller, "%s\n", hcd->product_desc); /* till now HC has been in an indeterminate state ... */ if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { dev_err(hcd->self.controller, "can't reset\n"); return retval; } if ((retval = hcd_buffer_create(hcd)) != 0) { dev_dbg(hcd->self.controller, "pool alloc failed\n"); return retval; } if ((retval = usb_register_bus(&hcd->self)) < 0) goto err1; if (hcd->driver->irq) { char buf[8], *bufp = buf; #ifdef __sparc__ bufp = __irq_itoa(irqnum); #else sprintf(buf, "%d", irqnum); #endif snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", hcd->driver->description, hcd->self.busnum); if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, hcd->irq_descr, hcd)) != 0) { dev_err(hcd->self.controller, "request interrupt %s failed\n", bufp); goto err2; } hcd->irq = irqnum; dev_info(hcd->self.controller, "irq %s, %s 0x%08llx\n", bufp, (hcd->driver->flags & HCD_MEMORY) ? "io mem" : "io base", (unsigned long long)hcd->rsrc_start); } else { hcd->irq = -1; if (hcd->rsrc_start) dev_info(hcd->self.controller, "%s 0x%08llx\n", (hcd->driver->flags & HCD_MEMORY) ? "io mem" : "io base", (unsigned long long)hcd->rsrc_start); } if ((retval = hcd->driver->start(hcd)) < 0) { dev_err(hcd->self.controller, "startup error %d\n", retval); goto err3; } return retval; err3: if (hcd->irq >= 0) free_irq(irqnum, hcd); err2: usb_deregister_bus(&hcd->self); err1: hcd_buffer_destroy(hcd); return retval; } EXPORT_SYMBOL (usb_add_hcd); /** * usb_remove_hcd - shutdown processing for generic HCDs * @hcd: the usb_hcd structure to remove * Context: !in_interrupt() * * Disconnects the root hub, then reverses the effects of usb_add_hcd(), * invoking the HCD's stop() method. */ void usb_remove_hcd(struct usb_hcd *hcd) { dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); if (HC_IS_RUNNING (hcd->state)) hcd->state = HC_STATE_QUIESCING; dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); spin_lock_irq (&hcd_root_hub_lock); hcd->rh_registered = 0; spin_unlock_irq (&hcd_root_hub_lock); usb_disconnect(&hcd->self.root_hub); hcd->driver->stop(hcd); hcd->state = HC_STATE_HALT; if (hcd->irq >= 0) free_irq(hcd->irq, hcd); usb_deregister_bus(&hcd->self); hcd_buffer_destroy(hcd); } EXPORT_SYMBOL (usb_remove_hcd); /*-------------------------------------------------------------------------*/ #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) struct usb_mon_operations *mon_ops; /* * The registration is unlocked. * We do it this way because we do not want to lock in hot paths. * * Notice that the code is minimally error-proof. Because usbmon needs * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. */ int usb_mon_register (struct usb_mon_operations *ops) { if (mon_ops) return -EBUSY; mon_ops = ops; mb(); return 0; } EXPORT_SYMBOL_GPL (usb_mon_register); void usb_mon_deregister (void) { if (mon_ops == NULL) { printk(KERN_ERR "USB: monitor was not registered\n"); return; } mon_ops = NULL; mb(); } EXPORT_SYMBOL_GPL (usb_mon_deregister); #endif /* CONFIG_USB_MON */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-12 02:52:03 -0400