renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-21 03:33:59 +08:00
Code
c6249ff752
linux-next/drivers/usb/host/ohci-q.c

1137 lines
32 KiB
C
Raw Normal View History

Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* OHCI HCD (Host Controller Driver) for USB.
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
*
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
*
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* This file is licenced under the GPL.
*/
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 21:55:46 +08:00
#include <linux/irq.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
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 21:55:46 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
static void urb_free_priv (struct ohci_hcd *hc, urb_priv_t *urb_priv)
{
int last = urb_priv->length - 1;
if (last >= 0) {
int i;
struct td *td;
for (i = 0; i <= last; i++) {
td = urb_priv->td [i];
if (td)
td_free (hc, td);
}
}
list_del (&urb_priv->pending);
kfree (urb_priv);
}
/*-------------------------------------------------------------------------*/
/*
* URB goes back to driver, and isn't reissued.
* It's completely gone from HC data structures.
* PRECONDITION: ohci lock held, irqs blocked.
*/
static void
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
finish_urb(struct ohci_hcd *ohci, struct urb *urb, int status)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
__releases(ohci->lock)
__acquires(ohci->lock)
{
// ASSERT (urb->hcpriv != 0);
urb_free_priv (ohci, urb->hcpriv);
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
if (likely(status == -EINPROGRESS))
status = 0;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
switch (usb_pipetype (urb->pipe)) {
case PIPE_ISOCHRONOUS:
ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs--;
USB: ohci: quirk AMD prefetch for USB 1.1 ISO transfer The following patch in the driver is required to avoid USB 1.1 device failures that may occur due to requests from USB OHCI controllers may be overwritten if the latency for any pending request by the USB controller is very long (in the range of milliseconds). Signed-off-by: Libin Yang <libin.yang@amd.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-11-04 14:55:18 +08:00
if (ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs == 0) {
if (quirk_amdiso(ohci))
USB host: Move AMD PLL quirk to pci-quirks.c This patch moves the AMD PLL quirk code in OHCI/EHCI driver to pci-quirks.c, and exports the functions to be used by xHCI driver later. AMD PLL quirk disable the optional PM feature inside specific SB700/SB800/Hudson-2/3 platforms under the following conditions: 1. If an isochronous device is connected to OHCI/EHCI/xHCI port and is active; 2. Optional PM feature that powers down the internal Bus PLL when the link is in low power state is enabled. Without AMD PLL quirk, USB isochronous stream may stutter or have breaks occasionally, which greatly impair the performance of audio/video streams. Currently AMD PLL quirk is implemented in OHCI and EHCI driver, and will be added to xHCI driver too. They are doing similar things actually, so move the quirk code to pci-quirks.c, which has several advantages: 1. Remove duplicate defines and functions in OHCI/EHCI (and xHCI) driver and make them cleaner; 2. AMD chipset information will be probed only once and then stored. Currently they're probed during every OHCI/EHCI initialization, move the detect code to pci-quirks.c saves the repeat detect cost; 3. Build up synchronization among OHCI/EHCI/xHCI driver. In current code, every host controller enable/disable PLL only according to its own status, and may enable PLL while there is still isoc transfer on other HCs. Move the quirk to pci-quirks.c prevents this issue. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alex He <alex.he@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-03-01 14:57:05 +08:00
usb_amd_quirk_pll_enable();
USB: ohci: quirk AMD prefetch for USB 1.1 ISO transfer The following patch in the driver is required to avoid USB 1.1 device failures that may occur due to requests from USB OHCI controllers may be overwritten if the latency for any pending request by the USB controller is very long (in the range of milliseconds). Signed-off-by: Libin Yang <libin.yang@amd.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-11-04 14:55:18 +08:00
if (quirk_amdprefetch(ohci))
sb800_prefetch(ohci, 0);
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
break;
case PIPE_INTERRUPT:
ohci_to_hcd(ohci)->self.bandwidth_int_reqs--;
break;
}
#ifdef OHCI_VERBOSE_DEBUG
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
urb_print(urb, "RET", usb_pipeout (urb->pipe), status);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif
/* urb->complete() can reenter this HCD */
USB: make HCDs responsible for managing endpoint queues This patch (as954) implements a suggestion of David Brownell's. Now the host controller drivers are responsible for linking and unlinking URBs to/from their endpoint queues. This eliminates the possiblity of strange situations where usbcore thinks an URB is linked but the HCD thinks it isn't. It also means HCDs no longer have to check for URBs being dequeued before they were fully enqueued. In addition to the core changes, this requires changing every host controller driver and the root-hub URB handler. For the most part the required changes are fairly small; drivers have to call usb_hcd_link_urb_to_ep() in their urb_enqueue method, usb_hcd_check_unlink_urb() in their urb_dequeue method, and usb_hcd_unlink_urb_from_ep() before giving URBs back. A few HCDs make matters more complicated by the way they split up the flow of control. In addition some method interfaces get changed. The endpoint argument for urb_enqueue is now redundant so it is removed. The unlink status is required by usb_hcd_check_unlink_urb(), so it has been added to urb_dequeue. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> CC: Olav Kongas <ok@artecdesign.ee> CC: Tony Olech <tony.olech@elandigitalsystems.com> CC: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-08 23:48:02 +08:00
usb_hcd_unlink_urb_from_ep(ohci_to_hcd(ohci), urb);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
spin_unlock (&ohci->lock);
USB: Eliminate urb->status usage! This patch (as979) removes the last vestiges of urb->status from the host controller drivers and the root-hub emulator. Now the field doesn't get set until just before the URB's completion routine is called. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> CC: Olav Kongas <ok@artecdesign.ee> CC: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> CC: Tony Olech <tony.olech@elandigitalsystems.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:42:24 +08:00
usb_hcd_giveback_urb(ohci_to_hcd(ohci), urb, status);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
spin_lock (&ohci->lock);
/* stop periodic dma if it's not needed */
if (ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs == 0
&& ohci_to_hcd(ohci)->self.bandwidth_int_reqs == 0) {
ohci->hc_control &= ~(OHCI_CTRL_PLE|OHCI_CTRL_IE);
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
}
}
/*-------------------------------------------------------------------------*
* ED handling functions
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
*-------------------------------------------------------------------------*/
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* search for the right schedule branch to use for a periodic ed.
* does some load balancing; returns the branch, or negative errno.
*/
static int balance (struct ohci_hcd *ohci, int interval, int load)
{
int i, branch = -ENOSPC;
/* iso periods can be huge; iso tds specify frame numbers */
if (interval > NUM_INTS)
interval = NUM_INTS;
/* search for the least loaded schedule branch of that period
* that has enough bandwidth left unreserved.
*/
for (i = 0; i < interval ; i++) {
if (branch < 0 || ohci->load [branch] > ohci->load [i]) {
int j;
/* usb 1.1 says 90% of one frame */
for (j = i; j < NUM_INTS; j += interval) {
if ((ohci->load [j] + load) > 900)
break;
}
if (j < NUM_INTS)
continue;
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
branch = i;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
return branch;
}
/*-------------------------------------------------------------------------*/
/* both iso and interrupt requests have periods; this routine puts them
* into the schedule tree in the apppropriate place. most iso devices use
* 1msec periods, but that's not required.
*/
static void periodic_link (struct ohci_hcd *ohci, struct ed *ed)
{
unsigned i;
ohci_vdbg (ohci, "link %sed %p branch %d [%dus.], interval %d\n",
(ed->hwINFO & cpu_to_hc32 (ohci, ED_ISO)) ? "iso " : "",
ed, ed->branch, ed->load, ed->interval);
for (i = ed->branch; i < NUM_INTS; i += ed->interval) {
struct ed **prev = &ohci->periodic [i];
__hc32 *prev_p = &ohci->hcca->int_table [i];
struct ed *here = *prev;
/* sorting each branch by period (slow before fast)
* lets us share the faster parts of the tree.
* (plus maybe: put interrupt eds before iso)
*/
while (here && ed != here) {
if (ed->interval > here->interval)
break;
prev = &here->ed_next;
prev_p = &here->hwNextED;
here = *prev;
}
if (ed != here) {
ed->ed_next = here;
if (here)
ed->hwNextED = *prev_p;
wmb ();
*prev = ed;
*prev_p = cpu_to_hc32(ohci, ed->dma);
wmb();
}
ohci->load [i] += ed->load;
}
ohci_to_hcd(ohci)->self.bandwidth_allocated += ed->load / ed->interval;
}
/* link an ed into one of the HC chains */
static int ed_schedule (struct ohci_hcd *ohci, struct ed *ed)
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
{
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int branch;
ed->state = ED_OPER;
ed->ed_prev = NULL;
ed->ed_next = NULL;
ed->hwNextED = 0;
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
if (quirk_zfmicro(ohci)
&& (ed->type == PIPE_INTERRUPT)
&& !(ohci->eds_scheduled++))
USB: ohci: fix 2 timers to fire at jiffies + 1s Code inspection discovered in 2 places timers were being incorrectly setup using round_jiffies_relative(HZ). The timer would then fire at time (0 <= T < HZ). Fix them to use round_jiffies(jiffies + HZ); Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <david-b@pacbell.net> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-29 05:50:30 +08:00
mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
wmb ();
/* we care about rm_list when setting CLE/BLE in case the HC was at
* work on some TD when CLE/BLE was turned off, and isn't quiesced
* yet. finish_unlinks() restarts as needed, some upcoming INTR_SF.
*
* control and bulk EDs are doubly linked (ed_next, ed_prev), but
* periodic ones are singly linked (ed_next). that's because the
* periodic schedule encodes a tree like figure 3-5 in the ohci
* spec: each qh can have several "previous" nodes, and the tree
* doesn't have unused/idle descriptors.
*/
switch (ed->type) {
case PIPE_CONTROL:
if (ohci->ed_controltail == NULL) {
WARN_ON (ohci->hc_control & OHCI_CTRL_CLE);
ohci_writel (ohci, ed->dma,
&ohci->regs->ed_controlhead);
} else {
ohci->ed_controltail->ed_next = ed;
ohci->ed_controltail->hwNextED = cpu_to_hc32 (ohci,
ed->dma);
}
ed->ed_prev = ohci->ed_controltail;
if (!ohci->ed_controltail && !ohci->ed_rm_list) {
wmb();
ohci->hc_control |= OHCI_CTRL_CLE;
ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent);
ohci_writel (ohci, ohci->hc_control,
&ohci->regs->control);
}
ohci->ed_controltail = ed;
break;
case PIPE_BULK:
if (ohci->ed_bulktail == NULL) {
WARN_ON (ohci->hc_control & OHCI_CTRL_BLE);
ohci_writel (ohci, ed->dma, &ohci->regs->ed_bulkhead);
} else {
ohci->ed_bulktail->ed_next = ed;
ohci->ed_bulktail->hwNextED = cpu_to_hc32 (ohci,
ed->dma);
}
ed->ed_prev = ohci->ed_bulktail;
if (!ohci->ed_bulktail && !ohci->ed_rm_list) {
wmb();
ohci->hc_control |= OHCI_CTRL_BLE;
ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent);
ohci_writel (ohci, ohci->hc_control,
&ohci->regs->control);
}
ohci->ed_bulktail = ed;
break;
// case PIPE_INTERRUPT:
// case PIPE_ISOCHRONOUS:
default:
branch = balance (ohci, ed->interval, ed->load);
if (branch < 0) {
ohci_dbg (ohci,
"ERR %d, interval %d msecs, load %d\n",
branch, ed->interval, ed->load);
// FIXME if there are TDs queued, fail them!
return branch;
}
ed->branch = branch;
periodic_link (ohci, ed);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* the HC may not see the schedule updates yet, but if it does
* then they'll be properly ordered.
*/
return 0;
}
/*-------------------------------------------------------------------------*/
/* scan the periodic table to find and unlink this ED */
static void periodic_unlink (struct ohci_hcd *ohci, struct ed *ed)
{
int i;
for (i = ed->branch; i < NUM_INTS; i += ed->interval) {
struct ed *temp;
struct ed **prev = &ohci->periodic [i];
__hc32 *prev_p = &ohci->hcca->int_table [i];
while (*prev && (temp = *prev) != ed) {
prev_p = &temp->hwNextED;
prev = &temp->ed_next;
}
if (*prev) {
*prev_p = ed->hwNextED;
*prev = ed->ed_next;
}
ohci->load [i] -= ed->load;
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ohci_to_hcd(ohci)->self.bandwidth_allocated -= ed->load / ed->interval;
ohci_vdbg (ohci, "unlink %sed %p branch %d [%dus.], interval %d\n",
(ed->hwINFO & cpu_to_hc32 (ohci, ED_ISO)) ? "iso " : "",
ed, ed->branch, ed->load, ed->interval);
}
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
/* unlink an ed from one of the HC chains.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
* just the link to the ed is unlinked.
* the link from the ed still points to another operational ed or 0
* so the HC can eventually finish the processing of the unlinked ed
* (assuming it already started that, which needn't be true).
*
* ED_UNLINK is a transient state: the HC may still see this ED, but soon
* it won't. ED_SKIP means the HC will finish its current transaction,
* but won't start anything new. The TD queue may still grow; device
* drivers don't know about this HCD-internal state.
*
* When the HC can't see the ED, something changes ED_UNLINK to one of:
*
* - ED_OPER: when there's any request queued, the ED gets rescheduled
* immediately. HC should be working on them.
*
* - ED_IDLE: when there's no TD queue. there's no reason for the HC
* to care about this ED; safe to disable the endpoint.
*
* When finish_unlinks() runs later, after SOF interrupt, it will often
* complete one or more URB unlinks before making that state change.
*/
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
static void ed_deschedule (struct ohci_hcd *ohci, struct ed *ed)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
ed->hwINFO |= cpu_to_hc32 (ohci, ED_SKIP);
wmb ();
ed->state = ED_UNLINK;
/* To deschedule something from the control or bulk list, just
* clear CLE/BLE and wait. There's no safe way to scrub out list
* head/current registers until later, and "later" isn't very
* tightly specified. Figure 6-5 and Section 6.4.2.2 show how
* the HC is reading the ED queues (while we modify them).
*
* For now, ed_schedule() is "later". It might be good paranoia
* to scrub those registers in finish_unlinks(), in case of bugs
* that make the HC try to use them.
*/
switch (ed->type) {
case PIPE_CONTROL:
/* remove ED from the HC's list: */
if (ed->ed_prev == NULL) {
if (!ed->hwNextED) {
ohci->hc_control &= ~OHCI_CTRL_CLE;
ohci_writel (ohci, ohci->hc_control,
&ohci->regs->control);
// a ohci_readl() later syncs CLE with the HC
} else
ohci_writel (ohci,
hc32_to_cpup (ohci, &ed->hwNextED),
&ohci->regs->ed_controlhead);
} else {
ed->ed_prev->ed_next = ed->ed_next;
ed->ed_prev->hwNextED = ed->hwNextED;
}
/* remove ED from the HCD's list: */
if (ohci->ed_controltail == ed) {
ohci->ed_controltail = ed->ed_prev;
if (ohci->ed_controltail)
ohci->ed_controltail->ed_next = NULL;
} else if (ed->ed_next) {
ed->ed_next->ed_prev = ed->ed_prev;
}
break;
case PIPE_BULK:
/* remove ED from the HC's list: */
if (ed->ed_prev == NULL) {
if (!ed->hwNextED) {
ohci->hc_control &= ~OHCI_CTRL_BLE;
ohci_writel (ohci, ohci->hc_control,
&ohci->regs->control);
// a ohci_readl() later syncs BLE with the HC
} else
ohci_writel (ohci,
hc32_to_cpup (ohci, &ed->hwNextED),
&ohci->regs->ed_bulkhead);
} else {
ed->ed_prev->ed_next = ed->ed_next;
ed->ed_prev->hwNextED = ed->hwNextED;
}
/* remove ED from the HCD's list: */
if (ohci->ed_bulktail == ed) {
ohci->ed_bulktail = ed->ed_prev;
if (ohci->ed_bulktail)
ohci->ed_bulktail->ed_next = NULL;
} else if (ed->ed_next) {
ed->ed_next->ed_prev = ed->ed_prev;
}
break;
// case PIPE_INTERRUPT:
// case PIPE_ISOCHRONOUS:
default:
periodic_unlink (ohci, ed);
break;
}
}
/*-------------------------------------------------------------------------*/
/* get and maybe (re)init an endpoint. init _should_ be done only as part
* of enumeration, usb_set_configuration() or usb_set_interface().
*/
static struct ed *ed_get (
struct ohci_hcd *ohci,
struct usb_host_endpoint *ep,
struct usb_device *udev,
unsigned int pipe,
int interval
) {
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
struct ed *ed;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
unsigned long flags;
spin_lock_irqsave (&ohci->lock, flags);
if (!(ed = ep->hcpriv)) {
struct td *td;
int is_out;
u32 info;
ed = ed_alloc (ohci, GFP_ATOMIC);
if (!ed) {
/* out of memory */
goto done;
}
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
/* dummy td; end of td list for ed */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
td = td_alloc (ohci, GFP_ATOMIC);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
if (!td) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* out of memory */
ed_free (ohci, ed);
ed = NULL;
goto done;
}
ed->dummy = td;
ed->hwTailP = cpu_to_hc32 (ohci, td->td_dma);
ed->hwHeadP = ed->hwTailP; /* ED_C, ED_H zeroed */
ed->state = ED_IDLE;
is_out = !(ep->desc.bEndpointAddress & USB_DIR_IN);
/* FIXME usbcore changes dev->devnum before SET_ADDRESS
trivial: OHCI: Fix typo in a comment trivial: OHCI: Fix typo in a comment Signed-off-by: Anand Gadiyar <gadiyar@ti.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-06-22 18:25:45 +08:00
* succeeds ... otherwise we wouldn't need "pipe".
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
info = usb_pipedevice (pipe);
ed->type = usb_pipetype(pipe);
info |= (ep->desc.bEndpointAddress & ~USB_DIR_IN) << 7;
USB: use usb_endpoint_maxp() instead of le16_to_cpu() Now ${LINUX}/drivers/usb/* can use usb_endpoint_maxp(desc) to get maximum packet size instead of le16_to_cpu(desc->wMaxPacketSize). This patch fix it up Cc: Armin Fuerst <fuerst@in.tum.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: Johannes Erdfelt <johannes@erdfelt.com> Cc: Vojtech Pavlik <vojtech@suse.cz> Cc: Oliver Neukum <oliver@neukum.name> Cc: David Kubicek <dave@awk.cz> Cc: Johan Hovold <jhovold@gmail.com> Cc: Brad Hards <bhards@bigpond.net.au> Acked-by: Felipe Balbi <balbi@ti.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Thomas Dahlmann <dahlmann.thomas@arcor.de> Cc: David Brownell <david-b@pacbell.net> Cc: David Lopo <dlopo@chipidea.mips.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Xie Xiaobo <X.Xie@freescale.com> Cc: Li Yang <leoli@freescale.com> Cc: Jiang Bo <tanya.jiang@freescale.com> Cc: Yuan-hsin Chen <yhchen@faraday-tech.com> Cc: Darius Augulis <augulis.darius@gmail.com> Cc: Xiaochen Shen <xiaochen.shen@intel.com> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Cc: OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Cc: Ben Dooks <ben@simtec.co.uk> Cc: Thomas Abraham <thomas.ab@samsung.com> Cc: Herbert Pötzl <herbert@13thfloor.at> Cc: Arnaud Patard <arnaud.patard@rtp-net.org> Cc: Roman Weissgaerber <weissg@vienna.at> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Tony Olech <tony.olech@elandigitalsystems.com> Cc: Florian Floe Echtler <echtler@fs.tum.de> Cc: Christian Lucht <lucht@codemercs.com> Cc: Juergen Stuber <starblue@sourceforge.net> Cc: Georges Toth <g.toth@e-biz.lu> Cc: Bill Ryder <bryder@sgi.com> Cc: Kuba Ober <kuba@mareimbrium.org> Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-23 18:12:03 +08:00
info |= usb_endpoint_maxp(&ep->desc) << 16;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (udev->speed == USB_SPEED_LOW)
info |= ED_LOWSPEED;
/* only control transfers store pids in tds */
if (ed->type != PIPE_CONTROL) {
info |= is_out ? ED_OUT : ED_IN;
if (ed->type != PIPE_BULK) {
/* periodic transfers... */
if (ed->type == PIPE_ISOCHRONOUS)
info |= ED_ISO;
else if (interval > 32) /* iso can be bigger */
interval = 32;
ed->interval = interval;
ed->load = usb_calc_bus_time (
udev->speed, !is_out,
ed->type == PIPE_ISOCHRONOUS,
USB: use usb_endpoint_maxp() instead of le16_to_cpu() Now ${LINUX}/drivers/usb/* can use usb_endpoint_maxp(desc) to get maximum packet size instead of le16_to_cpu(desc->wMaxPacketSize). This patch fix it up Cc: Armin Fuerst <fuerst@in.tum.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: Johannes Erdfelt <johannes@erdfelt.com> Cc: Vojtech Pavlik <vojtech@suse.cz> Cc: Oliver Neukum <oliver@neukum.name> Cc: David Kubicek <dave@awk.cz> Cc: Johan Hovold <jhovold@gmail.com> Cc: Brad Hards <bhards@bigpond.net.au> Acked-by: Felipe Balbi <balbi@ti.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Thomas Dahlmann <dahlmann.thomas@arcor.de> Cc: David Brownell <david-b@pacbell.net> Cc: David Lopo <dlopo@chipidea.mips.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Xie Xiaobo <X.Xie@freescale.com> Cc: Li Yang <leoli@freescale.com> Cc: Jiang Bo <tanya.jiang@freescale.com> Cc: Yuan-hsin Chen <yhchen@faraday-tech.com> Cc: Darius Augulis <augulis.darius@gmail.com> Cc: Xiaochen Shen <xiaochen.shen@intel.com> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Cc: OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Cc: Ben Dooks <ben@simtec.co.uk> Cc: Thomas Abraham <thomas.ab@samsung.com> Cc: Herbert Pötzl <herbert@13thfloor.at> Cc: Arnaud Patard <arnaud.patard@rtp-net.org> Cc: Roman Weissgaerber <weissg@vienna.at> Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Tony Olech <tony.olech@elandigitalsystems.com> Cc: Florian Floe Echtler <echtler@fs.tum.de> Cc: Christian Lucht <lucht@codemercs.com> Cc: Juergen Stuber <starblue@sourceforge.net> Cc: Georges Toth <g.toth@e-biz.lu> Cc: Bill Ryder <bryder@sgi.com> Cc: Kuba Ober <kuba@mareimbrium.org> Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-08-23 18:12:03 +08:00
usb_endpoint_maxp(&ep->desc))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/ 1000;
}
}
ed->hwINFO = cpu_to_hc32(ohci, info);
ep->hcpriv = ed;
}
done:
spin_unlock_irqrestore (&ohci->lock, flags);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
return ed;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/*-------------------------------------------------------------------------*/
/* request unlinking of an endpoint from an operational HC.
* put the ep on the rm_list
* real work is done at the next start frame (SF) hardware interrupt
* caller guarantees HCD is running, so hardware access is safe,
* and that ed->state is ED_OPER
*/
static void start_ed_unlink (struct ohci_hcd *ohci, struct ed *ed)
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
{
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ed->hwINFO |= cpu_to_hc32 (ohci, ED_DEQUEUE);
ed_deschedule (ohci, ed);
/* rm_list is just singly linked, for simplicity */
ed->ed_next = ohci->ed_rm_list;
ed->ed_prev = NULL;
ohci->ed_rm_list = ed;
/* enable SOF interrupt */
ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus);
ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable);
// flush those writes, and get latest HCCA contents
(void) ohci_readl (ohci, &ohci->regs->control);
/* SF interrupt might get delayed; record the frame counter value that
* indicates when the HC isn't looking at it, so concurrent unlinks
* behave. frame_no wraps every 2^16 msec, and changes right before
* SF is triggered.
*/
ed->tick = ohci_frame_no(ohci) + 1;
}
/*-------------------------------------------------------------------------*
* TD handling functions
*-------------------------------------------------------------------------*/
/* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
static void
td_fill (struct ohci_hcd *ohci, u32 info,
dma_addr_t data, int len,
struct urb *urb, int index)
{
struct td *td, *td_pt;
struct urb_priv *urb_priv = urb->hcpriv;
int is_iso = info & TD_ISO;
int hash;
// ASSERT (index < urb_priv->length);
/* aim for only one interrupt per urb. mostly applies to control
* and iso; other urbs rarely need more than one TD per urb.
* this way, only final tds (or ones with an error) cause IRQs.
* at least immediately; use DI=6 in case any control request is
* tempted to die part way through. (and to force the hc to flush
* its donelist soonish, even on unlink paths.)
*
* NOTE: could delay interrupts even for the last TD, and get fewer
* interrupts ... increasing per-urb latency by sharing interrupts.
* Drivers that queue bulk urbs may request that behavior.
*/
if (index != (urb_priv->length - 1)
|| (urb->transfer_flags & URB_NO_INTERRUPT))
info |= TD_DI_SET (6);
/* use this td as the next dummy */
td_pt = urb_priv->td [index];
/* fill the old dummy TD */
td = urb_priv->td [index] = urb_priv->ed->dummy;
urb_priv->ed->dummy = td_pt;
td->ed = urb_priv->ed;
td->next_dl_td = NULL;
td->index = index;
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
td->urb = urb;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
td->data_dma = data;
if (!len)
data = 0;
td->hwINFO = cpu_to_hc32 (ohci, info);
if (is_iso) {
td->hwCBP = cpu_to_hc32 (ohci, data & 0xFFFFF000);
*ohci_hwPSWp(ohci, td, 0) = cpu_to_hc16 (ohci,
(data & 0x0FFF) | 0xE000);
td->ed->last_iso = info & 0xffff;
} else {
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
td->hwCBP = cpu_to_hc32 (ohci, data);
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (data)
td->hwBE = cpu_to_hc32 (ohci, data + len - 1);
else
td->hwBE = 0;
td->hwNextTD = cpu_to_hc32 (ohci, td_pt->td_dma);
/* append to queue */
list_add_tail (&td->td_list, &td->ed->td_list);
/* hash it for later reverse mapping */
hash = TD_HASH_FUNC (td->td_dma);
td->td_hash = ohci->td_hash [hash];
ohci->td_hash [hash] = td;
/* HC might read the TD (or cachelines) right away ... */
wmb ();
td->ed->hwTailP = td->hwNextTD;
}
/*-------------------------------------------------------------------------*/
/* Prepare all TDs of a transfer, and queue them onto the ED.
* Caller guarantees HC is active.
* Usually the ED is already on the schedule, so TDs might be
* processed as soon as they're queued.
*/
static void td_submit_urb (
struct ohci_hcd *ohci,
struct urb *urb
) {
struct urb_priv *urb_priv = urb->hcpriv;
dma_addr_t data;
int data_len = urb->transfer_buffer_length;
int cnt = 0;
u32 info = 0;
int is_out = usb_pipeout (urb->pipe);
int periodic = 0;
/* OHCI handles the bulk/interrupt data toggles itself. We just
* use the device toggle bits for resetting, and rely on the fact
* that resetting toggle is meaningless if the endpoint is active.
*/
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
if (!usb_gettoggle (urb->dev, usb_pipeendpoint (urb->pipe), is_out)) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
usb_settoggle (urb->dev, usb_pipeendpoint (urb->pipe),
is_out, 1);
urb_priv->ed->hwHeadP &= ~cpu_to_hc32 (ohci, ED_C);
}
urb_priv->td_cnt = 0;
list_add (&urb_priv->pending, &ohci->pending);
if (data_len)
data = urb->transfer_dma;
else
data = 0;
/* NOTE: TD_CC is set so we can tell which TDs the HC processed by
* using TD_CC_GET, as well as by seeing them on the done list.
* (CC = NotAccessed ... 0x0F, or 0x0E in PSWs for ISO.)
*/
switch (urb_priv->ed->type) {
/* Bulk and interrupt are identical except for where in the schedule
* their EDs live.
*/
case PIPE_INTERRUPT:
/* ... and periodic urbs have extra accounting */
periodic = ohci_to_hcd(ohci)->self.bandwidth_int_reqs++ == 0
&& ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs == 0;
/* FALLTHROUGH */
case PIPE_BULK:
info = is_out
? TD_T_TOGGLE | TD_CC | TD_DP_OUT
: TD_T_TOGGLE | TD_CC | TD_DP_IN;
/* TDs _could_ transfer up to 8K each */
while (data_len > 4096) {
td_fill (ohci, info, data, 4096, urb, cnt);
data += 4096;
data_len -= 4096;
cnt++;
}
/* maybe avoid ED halt on final TD short read */
if (!(urb->transfer_flags & URB_SHORT_NOT_OK))
info |= TD_R;
td_fill (ohci, info, data, data_len, urb, cnt);
cnt++;
if ((urb->transfer_flags & URB_ZERO_PACKET)
&& cnt < urb_priv->length) {
td_fill (ohci, info, 0, 0, urb, cnt);
cnt++;
}
/* maybe kickstart bulk list */
if (urb_priv->ed->type == PIPE_BULK) {
wmb ();
ohci_writel (ohci, OHCI_BLF, &ohci->regs->cmdstatus);
}
break;
/* control manages DATA0/DATA1 toggle per-request; SETUP resets it,
* any DATA phase works normally, and the STATUS ack is special.
*/
case PIPE_CONTROL:
info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
td_fill (ohci, info, urb->setup_dma, 8, urb, cnt++);
if (data_len > 0) {
info = TD_CC | TD_R | TD_T_DATA1;
info |= is_out ? TD_DP_OUT : TD_DP_IN;
/* NOTE: mishandles transfers >8K, some >4K */
td_fill (ohci, info, data, data_len, urb, cnt++);
}
info = (is_out || data_len == 0)
? TD_CC | TD_DP_IN | TD_T_DATA1
: TD_CC | TD_DP_OUT | TD_T_DATA1;
td_fill (ohci, info, data, 0, urb, cnt++);
/* maybe kickstart control list */
wmb ();
ohci_writel (ohci, OHCI_CLF, &ohci->regs->cmdstatus);
break;
/* ISO has no retransmit, so no toggle; and it uses special TDs.
* Each TD could handle multiple consecutive frames (interval 1);
* we could often reduce the number of TDs here.
*/
case PIPE_ISOCHRONOUS:
for (cnt = 0; cnt < urb->number_of_packets; cnt++) {
int frame = urb->start_frame;
// FIXME scheduling should handle frame counter
// roll-around ... exotic case (and OHCI has
// a 2^16 iso range, vs other HCs max of 2^10)
frame += cnt * urb->interval;
frame &= 0xffff;
td_fill (ohci, TD_CC | TD_ISO | frame,
data + urb->iso_frame_desc [cnt].offset,
urb->iso_frame_desc [cnt].length, urb, cnt);
}
USB: ohci: quirk AMD prefetch for USB 1.1 ISO transfer The following patch in the driver is required to avoid USB 1.1 device failures that may occur due to requests from USB OHCI controllers may be overwritten if the latency for any pending request by the USB controller is very long (in the range of milliseconds). Signed-off-by: Libin Yang <libin.yang@amd.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-11-04 14:55:18 +08:00
if (ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs == 0) {
if (quirk_amdiso(ohci))
USB host: Move AMD PLL quirk to pci-quirks.c This patch moves the AMD PLL quirk code in OHCI/EHCI driver to pci-quirks.c, and exports the functions to be used by xHCI driver later. AMD PLL quirk disable the optional PM feature inside specific SB700/SB800/Hudson-2/3 platforms under the following conditions: 1. If an isochronous device is connected to OHCI/EHCI/xHCI port and is active; 2. Optional PM feature that powers down the internal Bus PLL when the link is in low power state is enabled. Without AMD PLL quirk, USB isochronous stream may stutter or have breaks occasionally, which greatly impair the performance of audio/video streams. Currently AMD PLL quirk is implemented in OHCI and EHCI driver, and will be added to xHCI driver too. They are doing similar things actually, so move the quirk code to pci-quirks.c, which has several advantages: 1. Remove duplicate defines and functions in OHCI/EHCI (and xHCI) driver and make them cleaner; 2. AMD chipset information will be probed only once and then stored. Currently they're probed during every OHCI/EHCI initialization, move the detect code to pci-quirks.c saves the repeat detect cost; 3. Build up synchronization among OHCI/EHCI/xHCI driver. In current code, every host controller enable/disable PLL only according to its own status, and may enable PLL while there is still isoc transfer on other HCs. Move the quirk to pci-quirks.c prevents this issue. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alex He <alex.he@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-03-01 14:57:05 +08:00
usb_amd_quirk_pll_disable();
USB: ohci: quirk AMD prefetch for USB 1.1 ISO transfer The following patch in the driver is required to avoid USB 1.1 device failures that may occur due to requests from USB OHCI controllers may be overwritten if the latency for any pending request by the USB controller is very long (in the range of milliseconds). Signed-off-by: Libin Yang <libin.yang@amd.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-11-04 14:55:18 +08:00
if (quirk_amdprefetch(ohci))
sb800_prefetch(ohci, 1);
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
periodic = ohci_to_hcd(ohci)->self.bandwidth_isoc_reqs++ == 0
&& ohci_to_hcd(ohci)->self.bandwidth_int_reqs == 0;
break;
}
/* start periodic dma if needed */
if (periodic) {
wmb ();
ohci->hc_control |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
}
// ASSERT (urb_priv->length == cnt);
}
/*-------------------------------------------------------------------------*
* Done List handling functions
*-------------------------------------------------------------------------*/
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
/* calculate transfer length/status and update the urb */
static int td_done(struct ohci_hcd *ohci, struct urb *urb, struct td *td)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
u32 tdINFO = hc32_to_cpup (ohci, &td->hwINFO);
int cc = 0;
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
int status = -EINPROGRESS;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
list_del (&td->td_list);
/* ISO ... drivers see per-TD length/status */
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
if (tdINFO & TD_ISO) {
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
u16 tdPSW = ohci_hwPSW(ohci, td, 0);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int dlen = 0;
/* NOTE: assumes FC in tdINFO == 0, and that
* only the first of 0..MAXPSW psws is used.
*/
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
cc = (tdPSW >> 12) & 0xF;
if (tdINFO & TD_CC) /* hc didn't touch? */
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
return status;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (usb_pipeout (urb->pipe))
dlen = urb->iso_frame_desc [td->index].length;
else {
/* short reads are always OK for ISO */
if (cc == TD_DATAUNDERRUN)
cc = TD_CC_NOERROR;
dlen = tdPSW & 0x3ff;
}
urb->actual_length += dlen;
urb->iso_frame_desc [td->index].actual_length = dlen;
urb->iso_frame_desc [td->index].status = cc_to_error [cc];
if (cc != TD_CC_NOERROR)
ohci_vdbg (ohci,
"urb %p iso td %p (%d) len %d cc %d\n",
urb, td, 1 + td->index, dlen, cc);
/* BULK, INT, CONTROL ... drivers see aggregate length/status,
* except that "setup" bytes aren't counted and "short" transfers
* might not be reported as errors.
*/
} else {
int type = usb_pipetype (urb->pipe);
u32 tdBE = hc32_to_cpup (ohci, &td->hwBE);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
cc = TD_CC_GET (tdINFO);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* update packet status if needed (short is normally ok) */
if (cc == TD_DATAUNDERRUN
&& !(urb->transfer_flags & URB_SHORT_NOT_OK))
cc = TD_CC_NOERROR;
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
if (cc != TD_CC_NOERROR && cc < 0x0E)
status = cc_to_error[cc];
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* count all non-empty packets except control SETUP packet */
if ((type != PIPE_CONTROL || td->index != 0) && tdBE != 0) {
if (td->hwCBP == 0)
urb->actual_length += tdBE - td->data_dma + 1;
else
urb->actual_length +=
hc32_to_cpup (ohci, &td->hwCBP)
- td->data_dma;
}
if (cc != TD_CC_NOERROR && cc < 0x0E)
ohci_vdbg (ohci,
"urb %p td %p (%d) cc %d, len=%d/%d\n",
urb, td, 1 + td->index, cc,
urb->actual_length,
urb->transfer_buffer_length);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
}
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
return status;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/*-------------------------------------------------------------------------*/
USB: avoid the donelist after an error in ohci-hcd This patch (as972) changes ohci-hcd so that after an error occurs, the remaining TDs for the URB will be skipped over entirely instead of going through the donelist. This enables the driver to give back the URB as soon as the error is detected, avoiding the need to store the error status in urb->status. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-23 01:08:40 +08:00
static void ed_halted(struct ohci_hcd *ohci, struct td *td, int cc)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
struct urb *urb = td->urb;
USB: avoid the donelist after an error in ohci-hcd This patch (as972) changes ohci-hcd so that after an error occurs, the remaining TDs for the URB will be skipped over entirely instead of going through the donelist. This enables the driver to give back the URB as soon as the error is detected, avoiding the need to store the error status in urb->status. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-23 01:08:40 +08:00
urb_priv_t *urb_priv = urb->hcpriv;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct ed *ed = td->ed;
struct list_head *tmp = td->td_list.next;
__hc32 toggle = ed->hwHeadP & cpu_to_hc32 (ohci, ED_C);
/* clear ed halt; this is the td that caused it, but keep it inactive
* until its urb->complete() has a chance to clean up.
*/
ed->hwINFO |= cpu_to_hc32 (ohci, ED_SKIP);
wmb ();
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
ed->hwHeadP &= ~cpu_to_hc32 (ohci, ED_H);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
USB: avoid the donelist after an error in ohci-hcd This patch (as972) changes ohci-hcd so that after an error occurs, the remaining TDs for the URB will be skipped over entirely instead of going through the donelist. This enables the driver to give back the URB as soon as the error is detected, avoiding the need to store the error status in urb->status. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-23 01:08:40 +08:00
/* Get rid of all later tds from this urb. We don't have
* to be careful: no errors and nothing was transferred.
* Also patch the ed so it looks as if those tds completed normally.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
while (tmp != &ed->td_list) {
struct td *next;
next = list_entry (tmp, struct td, td_list);
tmp = next->td_list.next;
if (next->urb != urb)
break;
/* NOTE: if multi-td control DATA segments get supported,
* this urb had one of them, this td wasn't the last td
* in that segment (TD_R clear), this ed halted because
* of a short read, _and_ URB_SHORT_NOT_OK is clear ...
* then we need to leave the control STATUS packet queued
* and clear ED_SKIP.
*/
USB: avoid the donelist after an error in ohci-hcd This patch (as972) changes ohci-hcd so that after an error occurs, the remaining TDs for the URB will be skipped over entirely instead of going through the donelist. This enables the driver to give back the URB as soon as the error is detected, avoiding the need to store the error status in urb->status. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-23 01:08:40 +08:00
list_del(&next->td_list);
urb_priv->td_cnt++;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ed->hwHeadP = next->hwNextTD | toggle;
}
/* help for troubleshooting: report anything that
* looks odd ... that doesn't include protocol stalls
* (or maybe some other things)
*/
switch (cc) {
case TD_DATAUNDERRUN:
if ((urb->transfer_flags & URB_SHORT_NOT_OK) == 0)
break;
/* fallthrough */
case TD_CC_STALL:
if (usb_pipecontrol (urb->pipe))
break;
/* fallthrough */
default:
ohci_dbg (ohci,
"urb %p path %s ep%d%s %08x cc %d --> status %d\n",
urb, urb->dev->devpath,
usb_pipeendpoint (urb->pipe),
usb_pipein (urb->pipe) ? "in" : "out",
hc32_to_cpu (ohci, td->hwINFO),
cc, cc_to_error [cc]);
}
}
/* replies to the request have to be on a FIFO basis so
* we unreverse the hc-reversed done-list
*/
static struct td *dl_reverse_done_list (struct ohci_hcd *ohci)
{
u32 td_dma;
struct td *td_rev = NULL;
struct td *td = NULL;
td_dma = hc32_to_cpup (ohci, &ohci->hcca->done_head);
ohci->hcca->done_head = 0;
wmb();
/* get TD from hc's singly linked list, and
* prepend to ours. ed->td_list changes later.
*/
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
while (td_dma) {
int cc;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
td = dma_to_td (ohci, td_dma);
if (!td) {
ohci_err (ohci, "bad entry %8x\n", td_dma);
break;
}
td->hwINFO |= cpu_to_hc32 (ohci, TD_DONE);
cc = TD_CC_GET (hc32_to_cpup (ohci, &td->hwINFO));
/* Non-iso endpoints can halt on error; un-halt,
* and dequeue any other TDs from this urb.
* No other TD could have caused the halt.
*/
if (cc != TD_CC_NOERROR
&& (td->ed->hwHeadP & cpu_to_hc32 (ohci, ED_H)))
USB: avoid the donelist after an error in ohci-hcd This patch (as972) changes ohci-hcd so that after an error occurs, the remaining TDs for the URB will be skipped over entirely instead of going through the donelist. This enables the driver to give back the URB as soon as the error is detected, avoiding the need to store the error status in urb->status. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-23 01:08:40 +08:00
ed_halted(ohci, td, cc);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
td->next_dl_td = td_rev;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
td_rev = td;
td_dma = hc32_to_cpup (ohci, &td->hwNextTD);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
return td_rev;
}
/*-------------------------------------------------------------------------*/
/* there are some urbs/eds to unlink; called in_irq(), with HCD locked */
static void
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 21:55:46 +08:00
finish_unlinks (struct ohci_hcd *ohci, u16 tick)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct ed *ed, **last;
rescan_all:
for (last = &ohci->ed_rm_list, ed = *last; ed != NULL; ed = *last) {
struct list_head *entry, *tmp;
int completed, modified;
__hc32 *prev;
/* only take off EDs that the HC isn't using, accounting for
* frame counter wraps and EDs with partially retired TDs
*/
[PATCH] ohci: don't play with IRQ regs This is a more correct fix for the way the ohci hcd was referencing pt_regs in the unlink paths. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-06 15:43:51 +08:00
if (likely (HC_IS_RUNNING(ohci_to_hcd(ohci)->state))) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (tick_before (tick, ed->tick)) {
skip_ed:
last = &ed->ed_next;
continue;
}
if (!list_empty (&ed->td_list)) {
struct td *td;
u32 head;
td = list_entry (ed->td_list.next, struct td,
td_list);
head = hc32_to_cpu (ohci, ed->hwHeadP) &
TD_MASK;
/* INTR_WDH may need to clean up first */
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
if (td->td_dma != head) {
if (ed == ohci->ed_to_check)
ohci->ed_to_check = NULL;
else
goto skip_ed;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
/* reentrancy: if we drop the schedule lock, someone might
* have modified this list. normally it's just prepending
* entries (which we'd ignore), but paranoia won't hurt.
*/
*last = ed->ed_next;
ed->ed_next = NULL;
modified = 0;
/* unlink urbs as requested, but rescan the list after
* we call a completion since it might have unlinked
* another (earlier) urb
*
* When we get here, the HC doesn't see this ed. But it
* must not be rescheduled until all completed URBs have
* been given back to the driver.
*/
rescan_this:
completed = 0;
prev = &ed->hwHeadP;
list_for_each_safe (entry, tmp, &ed->td_list) {
struct td *td;
struct urb *urb;
urb_priv_t *urb_priv;
__hc32 savebits;
USB: ohci - record data toggle after unlink This patch fixes a problem with OHCI where canceling bulk or interrupt URBs may lose track of the right data toggle. This seems to be a longstanding bug, possibly dating back to the Linux 2.4 kernel, which stayed hidden because (a) about half the time the data toggle bit was correct; (b) canceling such URBs is unusual; and (c) the few drivers which cancel these URBs either [1] do it only as part of shutting down, or [2] have fault recovery logic, which recovers. For those transfer types, the toggle is normally written back into the ED when each TD is retired. But canceling bypasses the mechanism used to retire TDs ... so on average, half the time the toggle bit will be invalid after cancelation. The fix is simple: the toggle state of any canceled TDs are propagated back to the ED in the finish_unlinks function. (Issue found by leonidv11@gmail.com ...) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Leonid <leonidv11@gmail.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-06-14 14:59:54 +08:00
u32 tdINFO;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
td = list_entry (entry, struct td, td_list);
urb = td->urb;
urb_priv = td->urb->hcpriv;
USB: add urb->unlinked field This patch (as970) adds a new urb->unlinked field, which is used to store the status of unlinked URBs since we can't use urb->status for that purpose any more. To help simplify the HCDs, usbcore will check urb->unlinked before calling the completion handler; if the value is set it will automatically override the status reported by the HCD. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> CC: Olav Kongas <ok@artecdesign.ee> CC: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> CC: Tony Olech <tony.olech@elandigitalsystems.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-22 03:40:36 +08:00
if (!urb->unlinked) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
prev = &td->hwNextTD;
continue;
}
/* patch pointer hc uses */
savebits = *prev & ~cpu_to_hc32 (ohci, TD_MASK);
*prev = td->hwNextTD | savebits;
USB: ohci - record data toggle after unlink This patch fixes a problem with OHCI where canceling bulk or interrupt URBs may lose track of the right data toggle. This seems to be a longstanding bug, possibly dating back to the Linux 2.4 kernel, which stayed hidden because (a) about half the time the data toggle bit was correct; (b) canceling such URBs is unusual; and (c) the few drivers which cancel these URBs either [1] do it only as part of shutting down, or [2] have fault recovery logic, which recovers. For those transfer types, the toggle is normally written back into the ED when each TD is retired. But canceling bypasses the mechanism used to retire TDs ... so on average, half the time the toggle bit will be invalid after cancelation. The fix is simple: the toggle state of any canceled TDs are propagated back to the ED in the finish_unlinks function. (Issue found by leonidv11@gmail.com ...) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Leonid <leonidv11@gmail.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-06-14 14:59:54 +08:00
/* If this was unlinked, the TD may not have been
* retired ... so manually save the data toggle.
* The controller ignores the value we save for
* control and ISO endpoints.
*/
tdINFO = hc32_to_cpup(ohci, &td->hwINFO);
if ((tdINFO & TD_T) == TD_T_DATA0)
ed->hwHeadP &= ~cpu_to_hc32(ohci, ED_C);
else if ((tdINFO & TD_T) == TD_T_DATA1)
ed->hwHeadP |= cpu_to_hc32(ohci, ED_C);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* HC may have partly processed this TD */
td_done (ohci, urb, td);
urb_priv->td_cnt++;
/* if URB is done, clean up */
if (urb_priv->td_cnt == urb_priv->length) {
modified = completed = 1;
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
finish_urb(ohci, urb, 0);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
if (completed && !list_empty (&ed->td_list))
goto rescan_this;
/* ED's now officially unlinked, hc doesn't see */
ed->state = ED_IDLE;
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
ohci->eds_scheduled--;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
ed->hwHeadP &= ~cpu_to_hc32(ohci, ED_H);
ed->hwNextED = 0;
wmb ();
ed->hwINFO &= ~cpu_to_hc32 (ohci, ED_SKIP | ED_DEQUEUE);
/* but if there's work queued, reschedule */
if (!list_empty (&ed->td_list)) {
if (HC_IS_RUNNING(ohci_to_hcd(ohci)->state))
ed_schedule (ohci, ed);
}
if (modified)
goto rescan_all;
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
/* maybe reenable control and bulk lists */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (HC_IS_RUNNING(ohci_to_hcd(ohci)->state)
&& ohci_to_hcd(ohci)->state != HC_STATE_QUIESCING
&& !ohci->ed_rm_list) {
u32 command = 0, control = 0;
if (ohci->ed_controltail) {
command |= OHCI_CLF;
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
if (quirk_zfmicro(ohci))
[PATCH] USB: OHCI on Compaq Aramada 7400 This adds a quirk to the OHCI driver that lets it work with an old Compaq implementation. It also removes some needless strings from the non-debug version of the driver. Signed-off-by: Chris Clayton <chris_clayton@f1internet.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-04-19 08:39:30 +08:00
mdelay(1);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!(ohci->hc_control & OHCI_CTRL_CLE)) {
control |= OHCI_CTRL_CLE;
ohci_writel (ohci, 0,
&ohci->regs->ed_controlcurrent);
}
}
if (ohci->ed_bulktail) {
command |= OHCI_BLF;
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
if (quirk_zfmicro(ohci))
[PATCH] USB: OHCI on Compaq Aramada 7400 This adds a quirk to the OHCI driver that lets it work with an old Compaq implementation. It also removes some needless strings from the non-debug version of the driver. Signed-off-by: Chris Clayton <chris_clayton@f1internet.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-04-19 08:39:30 +08:00
mdelay(1);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
if (!(ohci->hc_control & OHCI_CTRL_BLE)) {
control |= OHCI_CTRL_BLE;
ohci_writel (ohci, 0,
&ohci->regs->ed_bulkcurrent);
}
}
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* CLE/BLE to enable, CLF/BLF to (maybe) kickstart */
if (control) {
ohci->hc_control |= control;
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
if (quirk_zfmicro(ohci))
[PATCH] USB: OHCI on Compaq Aramada 7400 This adds a quirk to the OHCI driver that lets it work with an old Compaq implementation. It also removes some needless strings from the non-debug version of the driver. Signed-off-by: Chris Clayton <chris_clayton@f1internet.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-04-19 08:39:30 +08:00
mdelay(1);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
ohci_writel (ohci, ohci->hc_control,
&ohci->regs->control);
}
[PATCH] USB: OHCI on Compaq Aramada 7400 This adds a quirk to the OHCI driver that lets it work with an old Compaq implementation. It also removes some needless strings from the non-debug version of the driver. Signed-off-by: Chris Clayton <chris_clayton@f1internet.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-04-19 08:39:30 +08:00
if (command) {
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
if (quirk_zfmicro(ohci))
[PATCH] USB: OHCI on Compaq Aramada 7400 This adds a quirk to the OHCI driver that lets it work with an old Compaq implementation. It also removes some needless strings from the non-debug version of the driver. Signed-off-by: Chris Clayton <chris_clayton@f1internet.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-04-19 08:39:30 +08:00
mdelay(1);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
ohci_writel (ohci, command, &ohci->regs->cmdstatus);
}
[PATCH] USB: OHCI on Compaq Aramada 7400 This adds a quirk to the OHCI driver that lets it work with an old Compaq implementation. It also removes some needless strings from the non-debug version of the driver. Signed-off-by: Chris Clayton <chris_clayton@f1internet.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-04-19 08:39:30 +08:00
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
/*-------------------------------------------------------------------------*/
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
/*
* Used to take back a TD from the host controller. This would normally be
* called from within dl_done_list, however it may be called directly if the
* HC no longer sees the TD and it has not appeared on the donelist (after
* two frames). This bug has been observed on ZF Micro systems.
*/
static void takeback_td(struct ohci_hcd *ohci, struct td *td)
{
struct urb *urb = td->urb;
urb_priv_t *urb_priv = urb->hcpriv;
struct ed *ed = td->ed;
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
int status;
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
/* update URB's length and status from TD */
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
status = td_done(ohci, urb, td);
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
urb_priv->td_cnt++;
/* If all this urb's TDs are done, call complete() */
if (urb_priv->td_cnt == urb_priv->length)
USB: reorganize urb->status use in ohci-hcd This patch (as975) reorganizes the way ohci-hcd sets urb->status. It now keeps the information in a local variable until the last moment. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25 03:40:34 +08:00
finish_urb(ohci, urb, status);
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
/* clean schedule: unlink EDs that are no longer busy */
if (list_empty(&ed->td_list)) {
if (ed->state == ED_OPER)
start_ed_unlink(ohci, ed);
/* ... reenabling halted EDs only after fault cleanup */
} else if ((ed->hwINFO & cpu_to_hc32(ohci, ED_SKIP | ED_DEQUEUE))
== cpu_to_hc32(ohci, ED_SKIP)) {
td = list_entry(ed->td_list.next, struct td, td_list);
if (!(td->hwINFO & cpu_to_hc32(ohci, TD_DONE))) {
ed->hwINFO &= ~cpu_to_hc32(ohci, ED_SKIP);
/* ... hc may need waking-up */
switch (ed->type) {
case PIPE_CONTROL:
ohci_writel(ohci, OHCI_CLF,
&ohci->regs->cmdstatus);
break;
case PIPE_BULK:
ohci_writel(ohci, OHCI_BLF,
&ohci->regs->cmdstatus);
break;
}
}
}
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* Process normal completions (error or success) and clean the schedules.
*
* This is the main path for handing urbs back to drivers. The only other
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
* normal path is finish_unlinks(), which unlinks URBs using ed_rm_list,
* instead of scanning the (re-reversed) donelist as this does. There's
* an abnormal path too, handling a quirk in some Compaq silicon: URBs
* with TDs that appear to be orphaned are directly reclaimed.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
*/
static void
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 21:55:46 +08:00
dl_done_list (struct ohci_hcd *ohci)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
struct td *td = dl_reverse_done_list (ohci);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
while (td) {
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct td *td_next = td->next_dl_td;
USB: OHCI handles more ZFMicro quirks The ZF Micro OHCI controller exhibits unexpected behavior that seems to be related to high load. Under certain conditions, the controller will complete a TD, remove it from the endpoint's queue, and fail to add it to the donelist. This causes the endpoint to appear to stop responding. Worse, if the device is removed while in that state, OHCI will hang while waiting for the orphaned TD to complete. The situation is not recoverable without rebooting. This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag: 1. A watchdog routine periodically scans the OHCI structures to check for orphaned TDs. In these cases the TD is taken back from the controller and completed normally. 2. If a device is removed while the endpoint is hung but before the watchdog catches the situation, any outstanding TDs are taken back from the controller in the 'sanitize' phase. The ohci-hcd driver used to print "INTR_SF lossage" in this situation; this changes it to the universally accurate "ED unlink timeout". Other instances of this message presumably have different root causes. Both this Compaq quirk and a NEC quirk are now properly compiled out for non-PCI builds of this driver. Signed-off-by: Mike Nuss <mike@terascala.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-02 04:24:30 +08:00
takeback_td(ohci, td);
USB: ohci whitespace/comment fixups This is an OHCI cleanup patch ... it removes a lot of erroneous whitespace (space before tab, at end of line) as well as the obsolete inline changelog. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-12-05 19:18:31 +08:00
td = td_next;
}
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
Copy Permalink