2005-04-16 15:20:36 -07:00
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2009-04-24 10:12:18 +02:00
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2005-04-16 15:20:36 -07:00
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2007-10-23 20:42:11 +02:00
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2007-01-26 14:26:21 +01:00
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2010-04-24 23:21:52 +02:00
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2005-04-16 15:20:36 -07:00
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2008-12-19 10:27:56 -05:00
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2007-07-24 18:23:23 -04:00
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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 14:55:46 +01:00
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2005-04-16 15:20:36 -07:00
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2007-07-24 18:23:23 -04:00
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2005-04-16 15:20:36 -07:00
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2006-07-12 10:09:41 +02:00
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2008-01-30 15:21:33 -08:00
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2007-07-24 18:23:23 -04:00
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2006-07-12 10:09:41 +02:00
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2007-07-18 10:58:02 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-24 18:23:23 -04:00
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2005-04-16 15:20:36 -07:00
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2007-07-18 10:58:02 -07:00
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2006-07-12 10:09:41 +02:00
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2005-04-16 15:20:36 -07:00
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2006-07-12 10:09:41 +02:00
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2007-07-24 18:23:23 -04:00
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2006-07-12 10:09:41 +02:00
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2009-03-13 12:19:18 +01:00
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2006-07-12 10:09:41 +02:00
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2007-07-30 17:07:21 -04:00
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2006-07-12 10:09:41 +02:00
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2007-07-24 18:23:23 -04:00
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2006-07-12 10:09:41 +02:00
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2005-04-16 15:20:36 -07:00
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2006-07-12 10:09:41 +02:00
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2005-04-16 15:20:36 -07:00
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2007-07-18 10:58:02 -07:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-10-29 14:25:51 -07:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2006-05-19 13:20:20 -07:00
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2008-01-30 15:21:33 -08:00
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2006-05-19 13:20:20 -07:00
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2008-01-30 15:21:33 -08:00
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2006-05-19 13:20:20 -07:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2005-09-26 16:22:45 -04:00
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2005-04-16 15:20:36 -07:00
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2010-04-30 13:11:29 -06:00
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2005-09-26 16:22:45 -04:00
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2005-04-16 15:20:36 -07:00
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2005-09-26 16:22:45 -04:00
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2005-04-16 15:20:36 -07:00
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2005-09-26 16:22:45 -04:00
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2007-04-23 17:30:32 -04:00
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2005-09-26 16:22:45 -04:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2007-07-18 10:58:02 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-30 17:07:21 -04:00
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2007-07-18 10:58:02 -07:00
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2007-07-18 10:58:02 -07:00
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2009-08-24 14:44:30 +01:00
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2009-04-27 19:59:01 -07:00
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2010-05-05 15:26:17 -04:00
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2009-04-27 19:59:01 -07:00
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2010-05-05 15:26:17 -04:00
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2009-04-27 19:59:01 -07:00
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2010-05-05 15:26:17 -04:00
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2005-04-16 15:20:36 -07:00
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2010-05-05 15:26:17 -04:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2010-05-05 15:26:17 -04:00
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2010-04-02 13:27:28 -04:00
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2010-05-05 15:26:17 -04:00
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2009-04-27 19:59:01 -07:00
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2010-05-05 15:26:17 -04:00
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2010-06-18 10:16:33 -04:00
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2009-04-27 19:59:01 -07:00
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2010-05-05 15:26:17 -04:00
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2009-04-27 19:59:01 -07:00
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2010-04-02 13:27:28 -04:00
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2009-04-27 19:59:01 -07:00
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2010-04-02 13:27:28 -04:00
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2010-05-05 15:26:17 -04:00
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2009-06-11 08:40:39 -06:00
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2010-05-05 15:26:17 -04:00
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2009-06-11 08:40:39 -06:00
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2010-04-02 13:27:28 -04:00
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2009-04-27 19:59:01 -07:00
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2005-04-16 15:20:36 -07:00
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2010-05-05 15:26:17 -04:00
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2005-04-16 15:20:36 -07:00
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2010-05-05 15:26:17 -04:00
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2005-04-16 15:20:36 -07:00
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2008-08-05 13:05:17 -04:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2005-05-03 19:07:24 -06:00
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2005-04-16 15:20:36 -07:00
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USB: Support for bandwidth allocation.
Originally, the USB core had no support for allocating bandwidth when a
particular configuration or alternate setting for an interface was
selected. Instead, the device driver's URB submission would fail if
there was not enough bandwidth for a periodic endpoint. Drivers could
work around this, by using the scatter-gather list API to guarantee
bandwidth.
This patch adds host controller API to allow the USB core to allocate or
deallocate bandwidth for an endpoint. Endpoints are added to or dropped
from a copy of the current schedule by calling add_endpoint() or
drop_endpoint(), and then the schedule is atomically evaluated with a
call to check_bandwidth(). This allows all the endpoints for a new
configuration or alternate setting to be added at the same time that the
endpoints from the old configuration or alt setting are dropped.
Endpoints must be added to the schedule before any URBs are submitted to
them. The HCD must be allowed to reject a new configuration or alt
setting before the control transfer is sent to the device requesting the
change. It may reject the change because there is not enough bandwidth,
not enough internal resources (such as memory on an embedded host
controller), or perhaps even for security reasons in a virtualized
environment.
If the call to check_bandwidth() fails, the USB core must call
reset_bandwidth(). This causes the schedule to be reverted back to the
state it was in just after the last successful check_bandwidth() call.
If the call succeeds, the host controller driver (and hardware) will have
changed its internal state to match the new configuration or alternate
setting. The USB core can then issue a control transfer to the device to
change the configuration or alt setting. This allows the core to test new
configurations or alternate settings before unbinding drivers bound to
interfaces in the old configuration.
WIP:
The USB core must add endpoints from all interfaces in a configuration
to the schedule, because a driver may claim that interface at any time.
A slight optimization might be to add the endpoints to the schedule once
a driver claims that interface. FIXME
This patch does not cover changing alternate settings, but it does
handle a configuration change or de-configuration. FIXME
The code for managing the schedule is currently HCD specific. A generic
scheduling algorithm could be added for host controllers without
built-in scheduling support. For now, if a host controller does not
define the check_bandwidth() function, the call to
usb_hcd_check_bandwidth() will always succeed.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-27 19:58:26 -07:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2007-06-21 16:26:46 -04:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2007-06-21 16:26:46 -04:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2008-03-03 16:08:34 -08:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2008-03-03 16:08:34 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2007-08-20 10:45:28 -04:00
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2005-04-16 15:20:36 -07:00
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2007-08-20 10:45:28 -04:00
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2005-04-16 15:20:36 -07:00
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2009-02-20 16:33:08 -05:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2005-11-08 21:05:43 +01:00
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2005-04-16 15:20:36 -07:00
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2009-02-20 16:33:08 -05:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2007-01-26 14:26:21 +01:00
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2005-04-16 15:20:36 -07:00
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2009-07-10 11:04:58 +02:00
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2005-04-16 15:20:36 -07:00
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2009-04-24 10:12:18 +02:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2009-04-24 10:12:18 +02:00
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2005-04-16 15:20:36 -07:00
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2009-04-30 10:08:18 -04:00
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2005-04-16 15:20:36 -07:00
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2009-07-10 11:04:58 +02:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2009-04-30 10:08:18 -04:00
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2009-04-24 10:12:18 +02:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2009-04-24 10:12:18 +02:00
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2005-10-24 16:24:14 -04:00
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2008-01-30 15:21:33 -08:00
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2010-01-12 12:32:50 +01:00
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2008-01-30 15:21:33 -08:00
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2009-04-24 10:12:18 +02:00
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2008-01-30 15:21:33 -08:00
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2010-01-12 12:32:50 +01:00
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2008-01-30 15:21:33 -08:00
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2005-10-24 16:24:14 -04:00
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2005-04-16 15:20:36 -07:00
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2006-11-07 10:16:25 +01:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2008-12-05 14:10:34 -05:00
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2005-04-16 15:20:36 -07:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2007-07-30 17:05:22 -04:00
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2007-09-10 11:33:05 -04:00
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2009-01-15 17:03:33 -05:00
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2007-07-30 17:05:22 -04:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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USB: Free bandwidth when usb_disable_device is called.
Tanya ran into an issue when trying to switch a UAS device from the BOT
configuration to the UAS configuration via the bConfigurationValue sysfs
file. Before installing the UAS configuration, set_bConfigurationValue()
calls usb_disable_device(). That function is supposed to remove all host
controller resources associated with that device, but it leaves some state
in the xHCI host controller.
Commit 0791971ba8fbc44e4f476079f856335ed45e6324
usb: allow drivers to use allocated bandwidth until unbound
added a call to usb_disable_device() in usb_set_configuration(), before
the xHCI bandwidth functions were invoked. That commit fixed a bug, but
also introduced a bug that is triggered when a configured device is
switched to a new configuration.
usb_disable_device() goes through all the motions of unbinding the drivers
attached to active interfaces and removing the USB core structures
associated with those interfaces, but it doesn't actually remove the
endpoints from the internal xHCI host controller bandwidth structures.
When usb_disable_device() calls usb_disable_endpoint() with reset_hardware
set to true, the entries in udev->ep_out and udev->ep_in will be set to
NULL. Usually, when the USB core installs a new configuration,
usb_hcd_alloc_bandwidth() will drop all non-NULL endpoints in udev->ep_out
and udev->ep_in before adding any new endpoints. However, when the new
UAS configuration was added, all those entries were null, so none of the
old endpoints in the BOT configuration were dropped.
The xHCI driver blindly added the UAS configuration endpoints, and some of
the endpoint addresses overlapped with the old BOT configuration
endpoints. This caused the xHCI host to reject the Configure Endpoint
command. Now that the xHCI driver code is cleaned up to reject a
double-add of active endpoints, we need to fix the USB core to properly
drop old endpoints in usb_disable_device().
If the host controller driver needs bandwidth checking support, make
usb_disable_device() call usb_disable_endpoint() with
reset_hardware set to false, drop the endpoints from the xHCI host
controller, and then call usb_disable_endpoint() again with
reset_hardware set to true.
The first call to usb_disable_endpoint() will cancel any pending URBs and
wait on them to be freed in usb_hcd_disable_endpoint(), but will keep the
pointers in udev->ep_out and udev->ep in intact. Then
usb_hcd_alloc_bandwidth() will use those pointers to know which endpoints
to drop.
The final call to usb_disable_endpoint() will do two things:
1. It will call usb_hcd_disable_endpoint() again, which should be harmless
since the ep->urb_list should be empty after the first call to
usb_disable_endpoint() returns.
2. It will set the entries in udev->ep_out and udev->ep in to NULL, and call
usb_hcd_disable_endpoint(). That call will have no effect, since the xHCI
driver doesn't set the endpoint_disable function pointer.
Note that usb_disable_device() will now need to be called with
hcd->bandwidth_mutex held.
This should be backported to kernels as old as 2.6.32.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Tanya Brokhman <tlinder@codeaurora.org>
Cc: ablay@codeaurora.org
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: stable@kernel.org
2011-06-05 23:22:22 -07:00
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2005-04-16 15:20:36 -07:00
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USB: Free bandwidth when usb_disable_device is called.
Tanya ran into an issue when trying to switch a UAS device from the BOT
configuration to the UAS configuration via the bConfigurationValue sysfs
file. Before installing the UAS configuration, set_bConfigurationValue()
calls usb_disable_device(). That function is supposed to remove all host
controller resources associated with that device, but it leaves some state
in the xHCI host controller.
Commit 0791971ba8fbc44e4f476079f856335ed45e6324
usb: allow drivers to use allocated bandwidth until unbound
added a call to usb_disable_device() in usb_set_configuration(), before
the xHCI bandwidth functions were invoked. That commit fixed a bug, but
also introduced a bug that is triggered when a configured device is
switched to a new configuration.
usb_disable_device() goes through all the motions of unbinding the drivers
attached to active interfaces and removing the USB core structures
associated with those interfaces, but it doesn't actually remove the
endpoints from the internal xHCI host controller bandwidth structures.
When usb_disable_device() calls usb_disable_endpoint() with reset_hardware
set to true, the entries in udev->ep_out and udev->ep_in will be set to
NULL. Usually, when the USB core installs a new configuration,
usb_hcd_alloc_bandwidth() will drop all non-NULL endpoints in udev->ep_out
and udev->ep_in before adding any new endpoints. However, when the new
UAS configuration was added, all those entries were null, so none of the
old endpoints in the BOT configuration were dropped.
The xHCI driver blindly added the UAS configuration endpoints, and some of
the endpoint addresses overlapped with the old BOT configuration
endpoints. This caused the xHCI host to reject the Configure Endpoint
command. Now that the xHCI driver code is cleaned up to reject a
double-add of active endpoints, we need to fix the USB core to properly
drop old endpoints in usb_disable_device().
If the host controller driver needs bandwidth checking support, make
usb_disable_device() call usb_disable_endpoint() with
reset_hardware set to false, drop the endpoints from the xHCI host
controller, and then call usb_disable_endpoint() again with
reset_hardware set to true.
The first call to usb_disable_endpoint() will cancel any pending URBs and
wait on them to be freed in usb_hcd_disable_endpoint(), but will keep the
pointers in udev->ep_out and udev->ep in intact. Then
usb_hcd_alloc_bandwidth() will use those pointers to know which endpoints
to drop.
The final call to usb_disable_endpoint() will do two things:
1. It will call usb_hcd_disable_endpoint() again, which should be harmless
since the ep->urb_list should be empty after the first call to
usb_disable_endpoint() returns.
2. It will set the entries in udev->ep_out and udev->ep in to NULL, and call
usb_hcd_disable_endpoint(). That call will have no effect, since the xHCI
driver doesn't set the endpoint_disable function pointer.
Note that usb_disable_device() will now need to be called with
hcd->bandwidth_mutex held.
This should be backported to kernels as old as 2.6.32.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Tanya Brokhman <tlinder@codeaurora.org>
Cc: ablay@codeaurora.org
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: stable@kernel.org
2011-06-05 23:22:22 -07:00
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2005-04-16 15:20:36 -07:00
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2005-07-29 12:17:16 -07:00
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2005-04-16 15:20:36 -07:00
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2005-09-22 00:47:24 -07:00
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2005-07-29 12:17:16 -07:00
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2008-01-30 15:21:33 -08:00
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2008-05-02 06:02:41 +02:00
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2008-10-29 15:16:58 -04:00
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2008-12-05 14:10:34 -05:00
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2008-07-30 11:31:50 -04:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2010-09-30 15:16:23 -04:00
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USB: Free bandwidth when usb_disable_device is called.
Tanya ran into an issue when trying to switch a UAS device from the BOT
configuration to the UAS configuration via the bConfigurationValue sysfs
file. Before installing the UAS configuration, set_bConfigurationValue()
calls usb_disable_device(). That function is supposed to remove all host
controller resources associated with that device, but it leaves some state
in the xHCI host controller.
Commit 0791971ba8fbc44e4f476079f856335ed45e6324
usb: allow drivers to use allocated bandwidth until unbound
added a call to usb_disable_device() in usb_set_configuration(), before
the xHCI bandwidth functions were invoked. That commit fixed a bug, but
also introduced a bug that is triggered when a configured device is
switched to a new configuration.
usb_disable_device() goes through all the motions of unbinding the drivers
attached to active interfaces and removing the USB core structures
associated with those interfaces, but it doesn't actually remove the
endpoints from the internal xHCI host controller bandwidth structures.
When usb_disable_device() calls usb_disable_endpoint() with reset_hardware
set to true, the entries in udev->ep_out and udev->ep_in will be set to
NULL. Usually, when the USB core installs a new configuration,
usb_hcd_alloc_bandwidth() will drop all non-NULL endpoints in udev->ep_out
and udev->ep_in before adding any new endpoints. However, when the new
UAS configuration was added, all those entries were null, so none of the
old endpoints in the BOT configuration were dropped.
The xHCI driver blindly added the UAS configuration endpoints, and some of
the endpoint addresses overlapped with the old BOT configuration
endpoints. This caused the xHCI host to reject the Configure Endpoint
command. Now that the xHCI driver code is cleaned up to reject a
double-add of active endpoints, we need to fix the USB core to properly
drop old endpoints in usb_disable_device().
If the host controller driver needs bandwidth checking support, make
usb_disable_device() call usb_disable_endpoint() with
reset_hardware set to false, drop the endpoints from the xHCI host
controller, and then call usb_disable_endpoint() again with
reset_hardware set to true.
The first call to usb_disable_endpoint() will cancel any pending URBs and
wait on them to be freed in usb_hcd_disable_endpoint(), but will keep the
pointers in udev->ep_out and udev->ep in intact. Then
usb_hcd_alloc_bandwidth() will use those pointers to know which endpoints
to drop.
The final call to usb_disable_endpoint() will do two things:
1. It will call usb_hcd_disable_endpoint() again, which should be harmless
since the ep->urb_list should be empty after the first call to
usb_disable_endpoint() returns.
2. It will set the entries in udev->ep_out and udev->ep in to NULL, and call
usb_hcd_disable_endpoint(). That call will have no effect, since the xHCI
driver doesn't set the endpoint_disable function pointer.
Note that usb_disable_device() will now need to be called with
hcd->bandwidth_mutex held.
This should be backported to kernels as old as 2.6.32.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Tanya Brokhman <tlinder@codeaurora.org>
Cc: ablay@codeaurora.org
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: stable@kernel.org
2011-06-05 23:22:22 -07:00
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2010-09-30 15:16:23 -04:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2008-12-31 11:31:33 -05:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2007-07-30 17:05:22 -04:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2007-07-30 17:05:22 -04:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2008-12-31 11:31:33 -05:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2011-07-01 16:43:02 -04:00
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2005-04-16 15:20:36 -07:00
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2010-01-17 19:24:03 -02:00
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2008-08-14 09:37:34 -07:00
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2005-04-16 15:20:36 -07:00
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USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
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2010-10-15 08:55:24 -07:00
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USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
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2010-10-15 08:55:24 -07:00
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USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
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2008-03-11 10:20:12 -04:00
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2005-04-16 15:20:36 -07:00
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USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
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|
2010-10-15 08:55:24 -07:00
|
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|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
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|
2010-10-15 08:55:24 -07:00
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2005-04-16 15:20:36 -07:00
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2008-12-05 14:10:34 -05:00
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2005-10-24 15:33:03 -04:00
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2008-12-05 14:10:34 -05:00
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2009-01-15 17:03:33 -05:00
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2005-04-16 15:20:36 -07:00
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2005-04-18 17:39:25 -07:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 15:21:33 -08:00
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2005-04-16 15:20:36 -07:00
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2008-12-31 11:31:33 -05:00
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|
2008-12-05 14:10:34 -05:00
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|
2005-10-24 15:33:03 -04:00
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|
2008-12-05 14:10:34 -05:00
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|
2005-04-16 15:20:36 -07:00
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2008-01-25 11:12:21 -06:00
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2005-04-16 15:20:36 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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2005-04-18 17:39:25 -07:00
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2009-04-08 17:36:28 +00:00
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2005-04-16 15:20:36 -07:00
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|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
|
|
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|
2005-04-16 15:20:36 -07:00
|
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|
2009-01-15 17:03:33 -05:00
|
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|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
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|
|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
|
|
|
|
2010-10-15 08:55:24 -07:00
|
|
|
|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
|
|
|
|
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|
|
|
|
|
|
2010-02-18 02:36:23 +01:00
|
|
|
|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
2010-10-15 08:55:24 -07:00
|
|
|
|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2005-10-24 15:33:03 -04:00
|
|
|
|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
|
|
|
|
2010-10-15 08:55:24 -07:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
2008-12-05 14:10:34 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2008-12-31 11:31:33 -05:00
|
|
|
|
2008-12-05 14:10:34 -05:00
|
|
|
|
2005-10-24 15:33:03 -04:00
|
|
|
|
2008-12-05 14:10:34 -05:00
|
|
|
|
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
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|
|
|
|
|
|
|
2008-01-25 11:12:21 -06:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-08-02 22:44:27 -06:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
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|
|
2007-03-13 15:59:31 +01:00
|
|
|
|
2007-08-14 15:15:12 +02:00
|
|
|
|
2007-03-13 15:59:31 +01:00
|
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|
2007-08-14 15:15:12 +02:00
|
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|
2007-03-13 15:59:31 +01:00
|
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|
2007-08-14 15:15:12 +02:00
|
|
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|
2008-01-30 15:21:33 -08:00
|
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|
2007-03-13 15:59:31 +01:00
|
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2007-08-14 15:15:12 +02:00
|
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2007-03-13 15:59:31 +01:00
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2007-06-15 23:14:35 -04:00
|
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|
2008-01-30 15:21:33 -08:00
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2007-06-15 23:14:35 -04:00
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2008-11-13 10:31:35 -08:00
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|
2009-12-04 15:47:44 +02:00
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2008-11-13 10:31:35 -08:00
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2005-04-16 15:20:36 -07:00
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2007-02-08 16:40:43 -05:00
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2005-04-16 15:20:36 -07:00
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2007-07-31 20:34:01 -07:00
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2005-04-16 15:20:36 -07:00
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2008-06-17 23:24:08 +08:00
|
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2005-04-16 15:20:36 -07:00
|
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2005-05-03 19:07:24 -06:00
|
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|
2005-04-16 15:20:36 -07:00
|
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|
|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
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2005-04-16 15:20:36 -07:00
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2007-07-31 20:34:01 -07:00
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2007-02-08 16:40:43 -05:00
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2005-04-16 15:20:36 -07:00
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2007-02-08 16:40:43 -05:00
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2005-04-16 15:20:36 -07:00
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2010-01-12 12:32:50 +01:00
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2005-04-16 15:20:36 -07:00
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2007-10-18 03:06:30 -07:00
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2005-04-16 15:20:36 -07:00
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2005-10-24 15:38:24 -04:00
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2005-04-16 15:20:36 -07:00
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2010-01-12 12:32:50 +01:00
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2005-04-16 15:20:36 -07:00
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2007-10-18 03:06:30 -07:00
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2005-04-16 15:20:36 -07:00
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2006-03-09 14:10:49 +01:00
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2005-11-23 12:03:12 -05:00
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2006-08-30 15:47:18 -04:00
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2006-11-20 11:38:46 -05:00
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2006-08-30 15:47:18 -04:00
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2010-08-28 03:06:29 -03:00
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USB: Free bandwidth when usb_disable_device is called.
Tanya ran into an issue when trying to switch a UAS device from the BOT
configuration to the UAS configuration via the bConfigurationValue sysfs
file. Before installing the UAS configuration, set_bConfigurationValue()
calls usb_disable_device(). That function is supposed to remove all host
controller resources associated with that device, but it leaves some state
in the xHCI host controller.
Commit 0791971ba8fbc44e4f476079f856335ed45e6324
usb: allow drivers to use allocated bandwidth until unbound
added a call to usb_disable_device() in usb_set_configuration(), before
the xHCI bandwidth functions were invoked. That commit fixed a bug, but
also introduced a bug that is triggered when a configured device is
switched to a new configuration.
usb_disable_device() goes through all the motions of unbinding the drivers
attached to active interfaces and removing the USB core structures
associated with those interfaces, but it doesn't actually remove the
endpoints from the internal xHCI host controller bandwidth structures.
When usb_disable_device() calls usb_disable_endpoint() with reset_hardware
set to true, the entries in udev->ep_out and udev->ep_in will be set to
NULL. Usually, when the USB core installs a new configuration,
usb_hcd_alloc_bandwidth() will drop all non-NULL endpoints in udev->ep_out
and udev->ep_in before adding any new endpoints. However, when the new
UAS configuration was added, all those entries were null, so none of the
old endpoints in the BOT configuration were dropped.
The xHCI driver blindly added the UAS configuration endpoints, and some of
the endpoint addresses overlapped with the old BOT configuration
endpoints. This caused the xHCI host to reject the Configure Endpoint
command. Now that the xHCI driver code is cleaned up to reject a
double-add of active endpoints, we need to fix the USB core to properly
drop old endpoints in usb_disable_device().
If the host controller driver needs bandwidth checking support, make
usb_disable_device() call usb_disable_endpoint() with
reset_hardware set to false, drop the endpoints from the xHCI host
controller, and then call usb_disable_endpoint() again with
reset_hardware set to true.
The first call to usb_disable_endpoint() will cancel any pending URBs and
wait on them to be freed in usb_hcd_disable_endpoint(), but will keep the
pointers in udev->ep_out and udev->ep in intact. Then
usb_hcd_alloc_bandwidth() will use those pointers to know which endpoints
to drop.
The final call to usb_disable_endpoint() will do two things:
1. It will call usb_hcd_disable_endpoint() again, which should be harmless
since the ep->urb_list should be empty after the first call to
usb_disable_endpoint() returns.
2. It will set the entries in udev->ep_out and udev->ep in to NULL, and call
usb_hcd_disable_endpoint(). That call will have no effect, since the xHCI
driver doesn't set the endpoint_disable function pointer.
Note that usb_disable_device() will now need to be called with
hcd->bandwidth_mutex held.
This should be backported to kernels as old as 2.6.32.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Tanya Brokhman <tlinder@codeaurora.org>
Cc: ablay@codeaurora.org
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: stable@kernel.org
2011-06-05 23:22:22 -07:00
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2010-08-28 03:06:29 -03:00
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USB: Support for bandwidth allocation.
Originally, the USB core had no support for allocating bandwidth when a
particular configuration or alternate setting for an interface was
selected. Instead, the device driver's URB submission would fail if
there was not enough bandwidth for a periodic endpoint. Drivers could
work around this, by using the scatter-gather list API to guarantee
bandwidth.
This patch adds host controller API to allow the USB core to allocate or
deallocate bandwidth for an endpoint. Endpoints are added to or dropped
from a copy of the current schedule by calling add_endpoint() or
drop_endpoint(), and then the schedule is atomically evaluated with a
call to check_bandwidth(). This allows all the endpoints for a new
configuration or alternate setting to be added at the same time that the
endpoints from the old configuration or alt setting are dropped.
Endpoints must be added to the schedule before any URBs are submitted to
them. The HCD must be allowed to reject a new configuration or alt
setting before the control transfer is sent to the device requesting the
change. It may reject the change because there is not enough bandwidth,
not enough internal resources (such as memory on an embedded host
controller), or perhaps even for security reasons in a virtualized
environment.
If the call to check_bandwidth() fails, the USB core must call
reset_bandwidth(). This causes the schedule to be reverted back to the
state it was in just after the last successful check_bandwidth() call.
If the call succeeds, the host controller driver (and hardware) will have
changed its internal state to match the new configuration or alternate
setting. The USB core can then issue a control transfer to the device to
change the configuration or alt setting. This allows the core to test new
configurations or alternate settings before unbinding drivers bound to
interfaces in the old configuration.
WIP:
The USB core must add endpoints from all interfaces in a configuration
to the schedule, because a driver may claim that interface at any time.
A slight optimization might be to add the endpoints to the schedule once
a driver claims that interface. FIXME
This patch does not cover changing alternate settings, but it does
handle a configuration change or de-configuration. FIXME
The code for managing the schedule is currently HCD specific. A generic
scheduling algorithm could be added for host controllers without
built-in scheduling support. For now, if a host controller does not
define the check_bandwidth() function, the call to
usb_hcd_check_bandwidth() will always succeed.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-27 19:58:26 -07:00
|
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USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
|
|
|
|
USB: Support for bandwidth allocation.
Originally, the USB core had no support for allocating bandwidth when a
particular configuration or alternate setting for an interface was
selected. Instead, the device driver's URB submission would fail if
there was not enough bandwidth for a periodic endpoint. Drivers could
work around this, by using the scatter-gather list API to guarantee
bandwidth.
This patch adds host controller API to allow the USB core to allocate or
deallocate bandwidth for an endpoint. Endpoints are added to or dropped
from a copy of the current schedule by calling add_endpoint() or
drop_endpoint(), and then the schedule is atomically evaluated with a
call to check_bandwidth(). This allows all the endpoints for a new
configuration or alternate setting to be added at the same time that the
endpoints from the old configuration or alt setting are dropped.
Endpoints must be added to the schedule before any URBs are submitted to
them. The HCD must be allowed to reject a new configuration or alt
setting before the control transfer is sent to the device requesting the
change. It may reject the change because there is not enough bandwidth,
not enough internal resources (such as memory on an embedded host
controller), or perhaps even for security reasons in a virtualized
environment.
If the call to check_bandwidth() fails, the USB core must call
reset_bandwidth(). This causes the schedule to be reverted back to the
state it was in just after the last successful check_bandwidth() call.
If the call succeeds, the host controller driver (and hardware) will have
changed its internal state to match the new configuration or alternate
setting. The USB core can then issue a control transfer to the device to
change the configuration or alt setting. This allows the core to test new
configurations or alternate settings before unbinding drivers bound to
interfaces in the old configuration.
WIP:
The USB core must add endpoints from all interfaces in a configuration
to the schedule, because a driver may claim that interface at any time.
A slight optimization might be to add the endpoints to the schedule once
a driver claims that interface. FIXME
This patch does not cover changing alternate settings, but it does
handle a configuration change or de-configuration. FIXME
The code for managing the schedule is currently HCD specific. A generic
scheduling algorithm could be added for host controllers without
built-in scheduling support. For now, if a host controller does not
define the check_bandwidth() function, the call to
usb_hcd_check_bandwidth() will always succeed.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-27 19:58:26 -07:00
|
|
|
|
2010-10-15 08:55:24 -07:00
|
|
|
|
2010-08-28 03:06:29 -03:00
|
|
|
|
USB: Support for bandwidth allocation.
Originally, the USB core had no support for allocating bandwidth when a
particular configuration or alternate setting for an interface was
selected. Instead, the device driver's URB submission would fail if
there was not enough bandwidth for a periodic endpoint. Drivers could
work around this, by using the scatter-gather list API to guarantee
bandwidth.
This patch adds host controller API to allow the USB core to allocate or
deallocate bandwidth for an endpoint. Endpoints are added to or dropped
from a copy of the current schedule by calling add_endpoint() or
drop_endpoint(), and then the schedule is atomically evaluated with a
call to check_bandwidth(). This allows all the endpoints for a new
configuration or alternate setting to be added at the same time that the
endpoints from the old configuration or alt setting are dropped.
Endpoints must be added to the schedule before any URBs are submitted to
them. The HCD must be allowed to reject a new configuration or alt
setting before the control transfer is sent to the device requesting the
change. It may reject the change because there is not enough bandwidth,
not enough internal resources (such as memory on an embedded host
controller), or perhaps even for security reasons in a virtualized
environment.
If the call to check_bandwidth() fails, the USB core must call
reset_bandwidth(). This causes the schedule to be reverted back to the
state it was in just after the last successful check_bandwidth() call.
If the call succeeds, the host controller driver (and hardware) will have
changed its internal state to match the new configuration or alternate
setting. The USB core can then issue a control transfer to the device to
change the configuration or alt setting. This allows the core to test new
configurations or alternate settings before unbinding drivers bound to
interfaces in the old configuration.
WIP:
The USB core must add endpoints from all interfaces in a configuration
to the schedule, because a driver may claim that interface at any time.
A slight optimization might be to add the endpoints to the schedule once
a driver claims that interface. FIXME
This patch does not cover changing alternate settings, but it does
handle a configuration change or de-configuration. FIXME
The code for managing the schedule is currently HCD specific. A generic
scheduling algorithm could be added for host controllers without
built-in scheduling support. For now, if a host controller does not
define the check_bandwidth() function, the call to
usb_hcd_check_bandwidth() will always succeed.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-27 19:58:26 -07:00
|
|
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|
|
|
|
|
|
|
|
|
|
2008-01-30 15:21:33 -08:00
|
|
|
|
|
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|
|
2006-06-01 13:59:16 -04:00
|
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|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
|
|
2006-06-01 13:59:16 -04:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
|
USB: Check bandwidth when switching alt settings.
Make the USB core check the bandwidth when switching from one
interface alternate setting to another. Also check the bandwidth
when resetting a configuration (so that alt setting 0 is used). If
this check fails, the device's state is unchanged. If the device
refuses the new alt setting, re-instate the old alt setting in the
host controller hardware.
If a USB device doesn't have an alternate interface setting 0, install
the first alt setting in its descriptors when a new configuration is
requested, or the device is reset.
Add a mutex per root hub to protect bandwidth operations:
adding/reseting/changing configurations, and changing alternate interface
settings. We want to ensure that the xHCI host controller and the USB
device are set up for the same configurations and alternate settings.
There are two (possibly three) steps to do this:
1. The host controller needs to check that bandwidth is available for a
different setting, by issuing and waiting for a configure endpoint
command.
2. Once that returns successfully, a control message is sent to the
device.
3. If that fails, the host controller must be notified through another
configure endpoint command.
The mutex is used to make these three operations seem atomic, to prevent
another driver from using more bandwidth for a different device while
we're in the middle of these operations.
While we're touching the bandwidth code, rename usb_hcd_check_bandwidth()
to usb_hcd_alloc_bandwidth(). This function does more than just check
that the bandwidth change won't exceed the bus bandwidth; it actually
changes the bandwidth configuration in the xHCI host controller.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-03 09:44:36 -08:00
|
|
|
|
2010-10-15 08:55:24 -07:00
|
|
|
|
2010-08-28 03:06:29 -03:00
|
|
|
|
2006-06-01 13:59:16 -04:00
|
|
|
|
|
|
|
|
|
2010-10-15 08:55:24 -07:00
|
|
|
|
2006-06-01 13:59:16 -04:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
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|
2006-06-01 13:59:16 -04:00
|
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2005-04-16 15:20:36 -07:00
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2006-06-01 13:59:16 -04:00
|
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2007-06-15 23:14:35 -04:00
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|
2006-06-01 13:59:16 -04:00
|
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2005-04-16 15:20:36 -07:00
|
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2006-06-01 13:59:16 -04:00
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2005-04-16 15:20:36 -07:00
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2006-06-01 13:59:16 -04:00
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2008-12-31 11:31:33 -05:00
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2006-06-01 13:59:16 -04:00
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2007-03-13 15:59:31 +01:00
|
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2008-04-30 15:37:19 -04:00
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2006-06-01 13:59:16 -04:00
|
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|
2008-11-13 10:31:35 -08:00
|
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|
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2010-09-21 15:01:53 -04:00
|
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|
|
2008-01-30 15:21:33 -08:00
|
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2010-11-15 15:56:54 -05:00
|
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|
2008-05-02 06:02:41 +02:00
|
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2008-01-30 15:21:33 -08:00
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2006-06-01 13:59:16 -04:00
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2009-03-18 14:28:53 -04:00
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2006-06-01 13:59:16 -04:00
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2008-01-30 15:21:33 -08:00
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2006-06-01 13:59:16 -04:00
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|
2008-05-02 06:02:41 +02:00
|
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|
2006-06-01 13:59:16 -04:00
|
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|
2010-02-08 19:18:16 +01:00
|
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2008-01-30 15:21:33 -08:00
|
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2006-06-01 13:59:16 -04:00
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2008-05-02 06:02:41 +02:00
|
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2006-06-01 13:59:16 -04:00
|
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2005-04-16 15:20:36 -07:00
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2008-12-05 14:10:34 -05:00
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2005-04-16 15:20:36 -07:00
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2006-11-20 11:38:46 -05:00
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2005-07-29 12:17:16 -07:00
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2005-04-16 15:20:36 -07:00
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2008-12-19 10:27:56 -05:00
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2006-08-21 12:08:19 -04:00
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2008-12-19 10:27:56 -05:00
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2006-08-21 12:08:19 -04:00
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2006-11-22 14:57:56 +00:00
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2006-08-21 12:08:19 -04:00
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2006-11-22 14:57:56 +00:00
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2008-12-19 10:27:56 -05:00
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2006-08-21 12:08:19 -04:00
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2008-12-19 10:27:56 -05:00
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2006-08-21 12:08:19 -04:00
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2008-12-19 10:27:56 -05:00
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2006-08-21 12:08:19 -04:00
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tree-wide: fix assorted typos all over the place
That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-11-14 13:09:05 -02:00
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2006-08-21 12:08:19 -04:00
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2006-11-22 14:57:56 +00:00
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2006-08-21 12:08:19 -04:00
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2008-12-19 10:27:56 -05:00
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2006-08-21 12:08:19 -04:00
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2006-12-15 16:04:52 -05:00
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2006-08-21 12:08:19 -04:00
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