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)
A slight cleanup of timeout check in azx_get_response() to check
jiffies for HZ-independent timeout.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Assign the SPDIF always to the secondary device (dev#1) to keep
the same configuration. Move the optional capture device to the
third device (dev#2).
hda_intel now just ignores the NULL entries in the pcm arrays
from codecs.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Fix the order to call pci_disable_msi() to be after free_irq().
(Otherwise pci_disable_msi() bugs you.)
Also, added a description of disable_msi option to documentation.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Removed volatile from the position buffer pointer.
Also, use synchronize_irq() instead of unreliable msleep(1)
in the driver remove callback.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Simple patch to enable Message Signalled Interrupts for the HDA Intel
audio controller. Tested with:
Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 03)
MSI is better because it means audio doesn't end up sharing IRQ with USB.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Automatically switch to polling mode for CORB/RIRB communication
if the irq-driven mode seems not working well. If the polling
mode still doesn't work, switch to single_cmd mode as fallback.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Fixed 'section mismatch' errors in ALSA PCI drivers:
- removed invalid __devinitdata from pci id tables
- fix/remove __devinit of functions called in suspend/resume
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Add support for the ATI RS600 HDMI audio device. It has a one-stream
pure digital stereo codec that isn't handled by the generic codec
support.
Signed-off-by: Felix Kuehling <fkuehlin@ati.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This patch adds support for high definition audio on ATI SB600.
Signed-off-by: Felix Kuehling <fkuehlin@ati.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: HDA Intel driver
Switch the method to measure the current DMA position automatically
from position-buffer mode to LPIB-read mode with a sanity check.
Some hardwares seems to have problem with the position buffer.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: HDA Codec driver,HDA Intel driver
Switch to single_cmd mode automatically as a fallback when CORB/RIRB
communication doesn't work well. It may make the driver working on
some devices with broken BIOS/ACPI support.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Semaphore to mutex conversion.
The conversion was generated via scripts, and the result was validated
automatically via a script as well.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: Documentation,HDA Intel driver
Added single_cmd module option for debugging in the case CORB/RIRB
doesn't work well (e.g. due to wrong irq routings).
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: HDA Intel driver
This patch adds the Intel ICH8 HD Audio DID to the hda_intel.c audio driver.
Signed-off-by: Jason Gaston <Jason.d.gaston@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: HDA Intel driver
The probe_mask module parameter comment notes that the intended
default is -1. Fix it to be so, otherwise all codecs are skipped
and init fails.
Signed-off-by: Matt Porter <mporter@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: HDA Intel driver
- Use the position buffer for obtaining the current DMA position
as default. This seems more stable than others.
- Add probe_mask module option (mainly for test boards with multiple
codecs).
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: HDA Intel driver
Rate-limit the azx_get_response timeout message. A continuous 2 per second
is too much.
Signed-off-by: Randy Dunlap <randy_d_dunlap@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Remove the code for supporting eight cards from the integrated
controller drivers because There Can Be Only One controller of
each type per mainboard.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Modules: HDA Intel driver
This patch is to make the Intel HDA code work for NVIDIA azalia controller.
Modified by Takashi Iwai <tiwai@suse.de>
Signed-off-by: Vinod G. <vinodg@nvidia.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
HDA Intel driver
Disable the auto-correction of DMA position temporarily.
It doesn't work as expected yet...
Signed-off-by: Takashi Iwai <tiwai@suse.de>
HDA Codec driver,HDA Intel driver,HDA generic driver
Assign audio PCMs first before modem PCMs.
The modem stream is assigned up to device #6, to be consistent over
different models.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
HDA Intel driver
Check the validity of the current DMA position when position_fix=0 (auto)
is set. If the DMA position overcomes the threshold, the driver changes
the fix behavior automatically to use POSBUF.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
HDA Intel driver
Fix and clean up for the support of ULI M5461
- set CORB/RIRB sizes explicitly
- add workarounds for ULI on ia32
- max number of streams depends on the chip type now
- increase the size of BDL
Signed-off-by: Takashi Iwai <tiwai@suse.de>
HDA Intel driver
- removed SNDRV_PCM_INFO_RESUME (the driver cannot do PCM resume at the time)
- fixed chip->pcm_devs initialization
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
HDA Intel driver
Patch enables unsolicited responses on the HDA controller. Without
the UREN bit set, the controller will not place unsolicited responses
in a RIRB.
Signed-off-by: Matt <matt@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Documentation,HDA Codec driver,HDA generic driver,HDA Intel driver
- Fix some invalid configurations, typos in the last patch
- Make init_verbs chainable, so that different configs can share the same
init_verbs
- Reorder and clean up the source codes in patch_realtek.c
- Add the pin default configuration parser, used commonly in cmedia
and realtek patch codes.
- Add 'auto' model to ALC880 for auto-configuration from BIOS
Use this model as default, and 3-stack as fallback
Signed-off-by: Takashi Iwai <tiwai@suse.de>
HDA Codec driver,HDA Intel driver
Merged the work of pshou <pshou@realtek.com.tw> for the support of
more models with ALC codecs: ALC880 ASUS, Uniwill, FSC1734, generic 6-stack,
and ALC260 HP. Tests with the real hardwares are appreciated.
The codec patch is cleaned up: The preset configuration of codecs are
stored in the table and copied to the spec instance.
Added/fixed comments.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Documentation,HDA Intel driver
Added the support of VIA VT8251/VT8237A HD-Audio controllers.
They are (almost) compatible with Intel ICH6/7.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Documentation,HDA Intel driver
This patch changes the Intel HD Audio device driver to include
the support of HD Audio device embedded in ATI south bridge
IXP450. Because the design of ATI chipset follows intel HD Audio
specification 1.0, the programming method is the same as that
of intel HD Audio device exception one minor change which requires
to enable snoop for DMA transport. There are 3 changes that have been
made to hda_intel.c file.
1. Added device ID for ATI HD Audio device;
2. Increase maximum CODEC supported to 4;
3. Enable snoop during the driver initialization.
Signed-off-by: Frederick Li <fli@ati.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Documentation,HDA Intel driver
Added position_fix module option to HDA-intel driver for fixing up
the DMA position (possibly hardware-) bugs.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This adds the Intel ESB2 HD Audio DID to the hda_intel.c audio driver.
Signed-off-by: Jason Gaston <Jason.d.gaston@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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!
