index : litmus-rt.git	archive/unc-master-3.0 archived-2013.1 archived-private-master archived-semi-part demo ecrts-pgm-final ecrts14-pgm-final gpusync-rtss12 gpusync/staging linux-tip litmus2008-patch-series master pgm prop/litmus-signals prop/robust-tie-break staging test tracing-devel v2.6.34-with-arm-patches v2015.1 wip-2011.2-bbb wip-2011.2-bbb-trace wip-2012.3-gpu wip-2012.3-gpu-preport wip-2012.3-gpu-rtss13 wip-2012.3-gpu-sobliv-budget-w-kshark wip-aedzl-final wip-aedzl-revised wip-arbit-deadline wip-aux-tasks wip-bbb wip-bbb-prio-don wip-better-break wip-binary-heap wip-budget wip-color wip-color-jlh wip-d10-hz1000 wip-default-clustering wip-dissipation-jerickso wip-dissipation2-jerickso wip-ecrts14-pgm wip-edf-hsb wip-edf-os wip-edf-tie-break wip-edzl-critique wip-edzl-final wip-edzl-revised wip-events wip-extra-debug wip-fix-switch-jerickso wip-fix3 wip-fmlp-dequeue wip-ft-irq-flag wip-gpu-cleanup wip-gpu-interrupts wip-gpu-rtas12 wip-gpu-rtss12 wip-gpu-rtss12-srp wip-gpusync-merge wip-ikglp wip-k-fmlp wip-kernel-coloring wip-kernthreads wip-klmirqd-to-aux wip-kshark wip-litmus-3.2 wip-litmus2011.2 wip-litmus3.0-2011.2 wip-master-2.6.33-rt wip-mc wip-mc-bipasa wip-mc-jerickso wip-mc2-cache-slack wip-mcrit-mac wip-merge-3.0 wip-merge-v3.0 wip-migration-affinity wip-mmap-uncache wip-modechange wip-nested-locking wip-omlp-gedf wip-pai wip-percore-lib wip-performance wip-pgm wip-pgm-split wip-pm-ovd wip-prio-inh wip-prioq-dgl wip-refactored-gedf wip-release-master-fix wip-robust-tie-break wip-rt-kshark wip-rtas12-pgm wip-semi-part wip-semi-part-edfos-jerickso wip-shared-lib wip-shared-lib2 wip-shared-mem wip-splitting-jerickso wip-splitting-omlp-jerickso wip-stage-binheap wip-sun-port wip-timer-trace wip-tracepoints
	The LITMUS^RT kernel.	Bjoern Brandenburg

aboutsummaryrefslogtreecommitdiffstats

log msg author committer range

Branch	Commit message	Author	Age
archive/unc-master-3.0	P-FP: fix BUG_ON releated to priority inheritance	Bjoern Brandenburg	13 years
archived-2013.1	uncachedev: mmap memory that is not cached by CPUs	Glenn Elliott	12 years
archived-private-master	Merge branch 'wip-2.6.34' into old-private-master	Andrea Bastoni	15 years
archived-semi-part	Merge branch 'wip-semi-part' of ssh://cvs/cvs/proj/litmus/repo/litmus2010 int...	Andrea Bastoni	15 years
demo	Further refinements	Jonathan Herman	14 years
ecrts-pgm-final	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
ecrts14-pgm-final	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
gpusync-rtss12	Final GPUSync implementation.	Glenn Elliott	12 years
gpusync/staging	Rename IKGLP R2DGLP.	Glenn Elliott	12 years
linux-tip	Merge branch 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/p...	Linus Torvalds	15 years
litmus2008-patch-series	add i386 feather-trace implementation	Bjoern B. Brandenburg	16 years
master	PSN-EDF: use inferred_sporadic_job_release_at	Bjoern Brandenburg	9 years
pgm	make it compile	Glenn Elliott	12 years
prop/litmus-signals	Infrastructure for Litmus signals.	Glenn Elliott	13 years
prop/robust-tie-break	Fixed bug in edf_higher_prio().	Glenn Elliott	13 years
staging	Fix tracepoint compilation error	Felipe Cerqueira	13 years
test	9/23/2016	Namhoon Kim	9 years
tracing-devel	Test kernel tracing events capabilities	Andrea Bastoni	16 years
v2.6.34-with-arm-patches	smsc911x: Add spinlocks around registers access	Catalin Marinas	15 years
v2015.1	Add ARM syscall def for get_current_budget	Bjoern Brandenburg	10 years
wip-2011.2-bbb	Litmus core: simplify np-section protocol	Bjoern B. Brandenburg	14 years
wip-2011.2-bbb-trace	Refactor sched_trace_log_message() -> debug_trace_log_message()	Andrea Bastoni	14 years
wip-2012.3-gpu	SOBLIV draining support for C-EDF.	Glenn Elliott	12 years
wip-2012.3-gpu-preport	pick up last C-RM file	Glenn Elliott	12 years
wip-2012.3-gpu-rtss13	Fix critical bug in GPU tracker.	Glenn Elliott	12 years
wip-2012.3-gpu-sobliv-budget-w-kshark	Proper sobliv draining and many bug fixes.	Glenn Elliott	12 years
wip-aedzl-final	Make it easier to compile AEDZL interfaces in liblitmus.	Glenn Elliott	15 years
wip-aedzl-revised	Add sched_trace data for Apative EDZL	Glenn Elliott	15 years
wip-arbit-deadline	Fix compilation bug.	Glenn Elliott	13 years
wip-aux-tasks	Description of refined aux task inheritance.	Glenn Elliott	13 years
wip-bbb	GSN-EDF & Core: improve debug TRACE'ing for NP sections	Bjoern B. Brandenburg	14 years
wip-bbb-prio-don	use correct timestamp	Bjoern B. Brandenburg	14 years
wip-better-break	Implement hash-based EDF tie-breaking.	Glenn Elliott	13 years
wip-binary-heap	Make C-EDF work with simplified binheap_delete	Glenn Elliott	13 years
wip-budget	Added support for choices in budget policy enforcement.	Glenn Elliott	15 years
wip-color	Summarize schedulability with final record	Jonathan Herman	13 years
wip-color-jlh	sched_color: Fixed two bugs causing crashing on experiment restart and a rare...	Jonathan Herman	13 years
wip-d10-hz1000	Enable HZ=1000 on District 10	Bjoern B. Brandenburg	15 years
wip-default-clustering	Feature: Make default C-EDF clustering compile-time configurable.	Glenn Elliott	15 years
wip-dissipation-jerickso	Update from 2.6.36 to 2.6.36.4	Jeremy Erickson	11 years
wip-dissipation2-jerickso	Update 2.6.36 to 2.6.36.4	Jeremy Erickson	11 years
wip-ecrts14-pgm	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
wip-edf-hsb	last tested version	Jonathan Herman	14 years
wip-edf-os	Lookup table EDF-os	Jeremy Erickson	12 years
wip-edf-tie-break	Merge branch 'wip-edf-tie-break' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus...	Glenn Elliott	13 years
wip-edzl-critique	Use hr_timer's active checks instead of having own flag.	Glenn Elliott	15 years
wip-edzl-final	Implementation of the EDZL scheduler.	Glenn Elliott	15 years
wip-edzl-revised	Clean up comments.	Glenn Elliott	15 years
wip-events	Added support for tracing arbitrary actions.	Jonathan Herman	15 years
wip-extra-debug	DBG: add additional tracing	Bjoern B. Brandenburg	15 years
wip-fix-switch-jerickso	Attempt to fix race condition with plugin switching	Jeremy Erickson	15 years
wip-fix3	sched: show length of runqueue clock deactivation in /proc/sched_debug	Bjoern B. Brandenburg	15 years
wip-fmlp-dequeue	Improve FMLP queue management.	Glenn Elliott	14 years
wip-ft-irq-flag	Feather-Trace: keep track of interrupt-related interference.	Bjoern B. Brandenburg	14 years
wip-gpu-cleanup	Enable sched_trace log injection from userspace	Glenn Elliott	13 years
wip-gpu-interrupts	Remove option for threading of all softirqs.	Glenn Elliott	14 years
wip-gpu-rtas12	Generalized GPU cost predictors + EWMA. (untested)	Glenn Elliott	13 years
wip-gpu-rtss12	Final GPUSync implementation.	Glenn Elliott	13 years
wip-gpu-rtss12-srp	experimental changes to support GPUs under SRP	Glenn Elliott	13 years
wip-gpusync-merge	Cleanup priority tracking for budget enforcement.	Glenn Elliott	11 years
wip-ikglp	Move RSM and IKGLP imp. to own .c files	Glenn Elliott	13 years
wip-k-fmlp	Merge branch 'mpi-master' into wip-k-fmlp	Glenn Elliott	14 years
wip-kernel-coloring	Added recolor syscall	Namhoon Kim	7 years
wip-kernthreads	Kludge work-queue processing into klitirqd.	Glenn Elliott	15 years
wip-klmirqd-to-aux	Allow klmirqd threads to be given names.	Glenn Elliott	13 years
wip-kshark	Merge branch 'mpi-staging' into wip-kshark	Jonathan Herman	13 years
wip-litmus-3.2	Merge commit 'v3.2' into litmus-staging	Andrea Bastoni	13 years
wip-litmus2011.2	Cleanup: Coding conformance for affinity stuff.	Glenn Elliott	14 years
wip-litmus3.0-2011.2	Feather-Trace: keep track of interrupt-related interference.	Bjoern B. Brandenburg	14 years
wip-master-2.6.33-rt	Avoid deadlock when switching task policy to BACKGROUND (ugly)	Andrea Bastoni	15 years
wip-mc	Removed ARM-specific hacks which disabled less common mixed-criticality featu...	Jonathan Herman	12 years
wip-mc-bipasa	MC-EDF added	bipasa chattopadhyay	13 years
wip-mc-jerickso	Split C/D queues	Jeremy Erickson	15 years
wip-mc2-cache-slack	Manually patched mc^2 related code	Ming Yang	10 years
wip-mcrit-mac	cosmetic	Mac Mollison	15 years
wip-merge-3.0	Prevent Linux to send IPI and queue tasks on remote CPUs.	Andrea Bastoni	14 years
wip-merge-v3.0	Prevent Linux to send IPI and queue tasks on remote CPUs.	Andrea Bastoni	14 years
wip-migration-affinity	NULL affinity dereference in C-EDF.	Glenn Elliott	14 years
wip-mmap-uncache	share branch with others	Glenn Elliott	13 years
wip-modechange	RTSS 2017 submission	Namhoon Kim	8 years
wip-nested-locking	Appears to be working.	Bryan Ward	12 years
wip-omlp-gedf	First implementation of G-OMLP.	Glenn Elliott	15 years
wip-pai	Some cleanup of PAI	Glenn Elliott	14 years
wip-percore-lib	9/21/2016	Namhoon Kim	9 years
wip-performance	CONFIG_DONT_PREEMPT_ON_TIE: Don't preeempt a scheduled task on priority tie.	Glenn Elliott	14 years
wip-pgm	Add PGM support to C-FL	Glenn Elliott	12 years
wip-pgm-split	First draft of C-FL-split	Namhoon Kim	12 years
wip-pm-ovd	Add preemption-and-migration overhead tracing support	Andrea Bastoni	15 years
wip-prio-inh	P-EDF updated to use the generic pi framework.	Glenn Elliott	15 years
wip-prioq-dgl	BUG FIX: Support DGLs with PRIOQ_MUTEX	Glenn Elliott	13 years
wip-refactored-gedf	Generalizd architecture for GEDF-style scheduelrs to reduce code redundancy.	Glenn Elliott	15 years
wip-release-master-fix	bugfix: release master CPU must signal task was picked	Bjoern B. Brandenburg	14 years
wip-robust-tie-break	EDF priority tie-breaks.	Glenn Elliott	13 years
wip-rt-kshark	Move task time accounting into the complete_job method.	Jonathan Herman	13 years
wip-rtas12-pgm	Scheduling of PGM jobs.	Glenn Elliott	13 years
wip-semi-part	Fix compile error with newer GCC	Jeremy Erickson	12 years
wip-semi-part-edfos-jerickso	Use initial CPU set by client	Jeremy Erickson	12 years
wip-shared-lib	TODO: Fix condition checks in replicate_page_move_mapping()	Namhoon Kim	9 years
wip-shared-lib2	RTAS 2017 Submission ver.	Namhoon Kim	9 years
wip-shared-mem	Initial commit for shared library	Namhoon Kim	9 years
wip-splitting-jerickso	Fix release behavior	Jeremy Erickson	13 years
wip-splitting-omlp-jerickso	Bjoern's Dissertation Code with Priority Donation	Jeremy Erickson	13 years
wip-stage-binheap	An efficient binary heap implementation.	Glenn Elliott	13 years
wip-sun-port	Dynamic memory allocation and clean exit for FeatherTrace	Christopher Kenna	15 years
wip-timer-trace	bugfix: C-EDF, clear scheduled field of the correct CPU upon task_exit	Andrea Bastoni	15 years
wip-tracepoints	Add kernel-style events for sched_trace_XXX() functions	Andrea Bastoni	14 years
Tag	Download	Author	Age
2015.1	commit 8e51b37822...	Bjoern Brandenburg	10 years
2013.1	commit bcaacec1ca...	Glenn Elliott	12 years
2012.3	commit c158b5fbe4...	Jonathan Herman	13 years
2012.2	commit b53c479a0f...	Glenn Elliott	13 years
2012.1	commit 83b11ea1c6...	Bjoern B. Brandenburg	14 years
rtas12-mc-beta-exp	commit 8e236ee20f...	Christopher Kenna	14 years
2011.1	commit d11808b5c6...	Christopher Kenna	15 years
v2.6.37-rc4	commit e8a7e48bb2...	Linus Torvalds	15 years
v2.6.37-rc3	commit 3561d43fd2...	Linus Torvalds	15 years
v2.6.37-rc2	commit e53beacd23...	Linus Torvalds	15 years
v2.6.37-rc1	commit c8ddb2713c...	Linus Torvalds	15 years
v2.6.36	commit f6f94e2ab1...	Linus Torvalds	15 years
2010.2	commit 5c5456402d...	Bjoern B. Brandenburg	15 years
v2.6.36-rc8	commit cd07202cc8...	Linus Torvalds	15 years
v2.6.36-rc7	commit cb655d0f3d...	Linus Torvalds	15 years
v2.6.36-rc6	commit 899611ee7d...	Linus Torvalds	15 years
v2.6.36-rc5	commit b30a3f6257...	Linus Torvalds	15 years
v2.6.36-rc4	commit 49553c2ef8...	Linus Torvalds	15 years
v2.6.36-rc3	commit 2bfc96a127...	Linus Torvalds	15 years
v2.6.36-rc2	commit 76be97c1fc...	Linus Torvalds	15 years
v2.6.36-rc1	commit da5cabf80e...	Linus Torvalds	15 years
v2.6.35	commit 9fe6206f40...	Linus Torvalds	15 years
v2.6.35-rc6	commit b37fa16e78...	Linus Torvalds	15 years
v2.6.35-rc5	commit 1c5474a65b...	Linus Torvalds	15 years
v2.6.35-rc4	commit 815c4163b6...	Linus Torvalds	15 years
v2.6.35-rc3	commit 7e27d6e778...	Linus Torvalds	15 years
v2.6.35-rc2	commit e44a21b726...	Linus Torvalds	15 years
v2.6.35-rc1	commit 67a3e12b05...	Linus Torvalds	15 years
2010.1	commit 7c1ff4c544...	Andrea Bastoni	15 years
v2.6.34	commit e40152ee1e...	Linus Torvalds	15 years
v2.6.33.4	commit 4640b4e7d9...	Greg Kroah-Hartman	15 years
v2.6.34-rc7	commit b57f95a382...	Linus Torvalds	15 years
v2.6.34-rc6	commit 66f41d4c5c...	Linus Torvalds	15 years
v2.6.33.3	commit 3e7ad8ed97...	Greg Kroah-Hartman	15 years
v2.6.34-rc5	commit 01bf0b6457...	Linus Torvalds	15 years
v2.6.34-rc4	commit 0d0fb0f9c5...	Linus Torvalds	15 years
v2.6.33.2	commit 19f00f070c...	Greg Kroah-Hartman	15 years
v2.6.34-rc3	commit 2eaa9cfdf3...	Linus Torvalds	15 years
v2.6.34-rc2	commit 220bf991b0...	Linus Torvalds	15 years
v2.6.33.1	commit dbdafe5ccf...	Greg Kroah-Hartman	15 years
v2.6.34-rc1	commit 57d54889cd...	Linus Torvalds	16 years
v2.6.33	commit 60b341b778...	Linus Torvalds	16 years
v2.6.33-rc8	commit 724e6d3fe8...	Linus Torvalds	16 years
v2.6.33-rc7	commit 29275254ca...	Linus Torvalds	16 years
v2.6.33-rc6	commit abe94c756c...	Linus Torvalds	16 years
v2.6.33-rc5	commit 92dcffb916...	Linus Torvalds	16 years
v2.6.33-rc4	commit 7284ce6c9f...	Linus Torvalds	16 years
v2.6.33-rc3	commit 74d2e4f8d7...	Linus Torvalds	16 years
v2.6.33-rc2	commit 6b7b284958...	Linus Torvalds	16 years
v2.6.33-rc1	commit 55639353a0...	Linus Torvalds	16 years
v2.6.32	commit 22763c5cf3...	Linus Torvalds	16 years
v2.6.32-rc8	commit 648f4e3e50...	Linus Torvalds	16 years
v2.6.32-rc7	commit 156171c71a...	Linus Torvalds	16 years
v2.6.32-rc6	commit b419148e56...	Linus Torvalds	16 years
v2.6.32-rc5	commit 012abeea66...	Linus Torvalds	16 years
v2.6.32-rc4	commit 161291396e...	Linus Torvalds	16 years
v2.6.32-rc3	commit 374576a8b6...	Linus Torvalds	16 years
v2.6.32-rc1	commit 17d857be64...	Linus Torvalds	16 years
v2.6.32-rc2	commit 17d857be64...	Linus Torvalds	16 years
v2.6.31	commit 74fca6a428...	Linus Torvalds	16 years
v2.6.31-rc9	commit e07cccf404...	Linus Torvalds	16 years
v2.6.31-rc8	commit 326ba5010a...	Linus Torvalds	16 years
v2.6.31-rc7	commit 422bef879e...	Linus Torvalds	16 years
v2.6.31-rc6	commit 64f1607ffb...	Linus Torvalds	16 years
v2.6.31-rc5	commit ed680c4ad4...	Linus Torvalds	16 years
v2.6.31-rc4	commit 4be3bd7849...	Linus Torvalds	16 years
v2.6.31-rc3	commit 6847e154e3...	Linus Torvalds	16 years
v2.6.31-rc2	commit 8e4a718ff3...	Linus Torvalds	16 years
v2.6.31-rc1	commit 28d0325ce6...	Linus Torvalds	16 years
v2.6.30	commit 07a2039b8e...	Linus Torvalds	16 years
v2.6.30-rc8	commit 9fa7eb283c...	Linus Torvalds	16 years
v2.6.30-rc7	commit 59a3759d0f...	Linus Torvalds	16 years
v2.6.30-rc6	commit 1406de8e11...	Linus Torvalds	16 years
v2.6.30-rc5	commit 091bf7624d...	Linus Torvalds	16 years
v2.6.30-rc4	commit 091438dd56...	Linus Torvalds	16 years
v2.6.30-rc3	commit 0910697403...	Linus Torvalds	16 years
v2.6.30-rc2	commit 0882e8dd3a...	Linus Torvalds	16 years
v2.6.30-rc1	commit 577c9c456f...	Linus Torvalds	16 years
v2.6.29	commit 8e0ee43bc2...	Linus Torvalds	16 years
v2.6.29-rc8	commit 041b62374c...	Linus Torvalds	17 years
v2.6.29-rc7	commit fec6c6fec3...	Linus Torvalds	17 years
v2.6.29-rc6	commit 20f4d6c3a2...	Linus Torvalds	17 years
v2.6.29-rc5	commit d2f8d7ee1a...	Linus Torvalds	17 years
v2.6.29-rc4	commit 8e4921515c...	Linus Torvalds	17 years
v2.6.29-rc3	commit 18e352e4a7...	Linus Torvalds	17 years
v2.6.29-rc2	commit 1de9e8e70f...	Linus Torvalds	17 years
v2.6.29-rc1	commit c59765042f...	Linus Torvalds	17 years
v2.6.28	commit 4a6908a3a0...	Linus Torvalds	17 years
v2.6.28-rc9	commit 929096fe9f...	Linus Torvalds	17 years
v2.6.28-rc8	commit 8b1fae4e42...	Linus Torvalds	17 years
v2.6.28-rc7	commit 061e41fdb5...	Linus Torvalds	17 years
v2.6.28-rc6	commit 13d428afc0...	Linus Torvalds	17 years
v2.6.28-rc5	commit 9bf1a2445f...	Linus Torvalds	17 years
v2.6.28-rc4	commit f7160c7573...	Linus Torvalds	17 years
v2.6.28-rc3	commit 45beca08dd...	Linus Torvalds	17 years
v2.6.28-rc2	commit 0173a3265b...	Linus Torvalds	17 years
v2.6.28-rc1	commit 57f8f7b60d...	Linus Torvalds	17 years
v2.6.27	commit 3fa8749e58...	Linus Torvalds	17 years
v2.6.27-rc9	commit 4330ed8ed4...	Linus Torvalds	17 years
v2.6.27-rc8	commit 94aca1dac6...	Linus Torvalds	17 years
v2.6.27-rc7	commit 72d31053f6...	Linus Torvalds	17 years
v2.6.27-rc6	commit adee14b2e1...	Linus Torvalds	17 years
v2.6.27-rc5	commit 24342c34a0...	Linus Torvalds	17 years
v2.6.27-rc4	commit 6a55617ed5...	Linus Torvalds	17 years
v2.6.27-rc3	commit 30a2f3c60a...	Linus Torvalds	17 years
v2.6.27-rc2	commit 0967d61ea0...	Linus Torvalds	17 years
v2.6.27-rc1	commit 6e86841d05...	Linus Torvalds	17 years
v2.6.26	commit bce7f793da...	Linus Torvalds	17 years
v2.6.26-rc9	commit b7279469d6...	Linus Torvalds	17 years
v2.6.26-rc8	commit 543cf4cb3f...	Linus Torvalds	17 years
v2.6.26-rc7	commit d70ac829b7...	Linus Torvalds	17 years
v2.6.26-rc6	commit 5dd34572ad...	Linus Torvalds	17 years
v2.6.26-rc5	commit 53c8ba9540...	Linus Torvalds	17 years
v2.6.26-rc4	commit e490517a03...	Linus Torvalds	17 years
v2.6.26-rc3	commit b8291ad07a...	Linus Torvalds	17 years
v2.6.26-rc2	commit 492c2e476e...	Linus Torvalds	17 years
v2.6.26-rc1	commit 2ddcca36c8...	Linus Torvalds	17 years
v2.6.25	commit 4b119e21d0...	Linus Torvalds	17 years
v2.6.25-rc9	commit 120dd64cac...	Linus Torvalds	17 years
v2.6.25-rc8	commit 0e81a8ae37...	Linus Torvalds	17 years
v2.6.25-rc7	commit 05dda977f2...	Linus Torvalds	17 years
v2.6.25-rc6	commit a978b30af3...	Linus Torvalds	17 years
v2.6.25-rc5	commit cdeeeae056...	Linus Torvalds	18 years
v2.6.25-rc4	commit 29e8c3c304...	Linus Torvalds	18 years
v2.6.25-rc3	commit bfa274e243...	Linus Torvalds	18 years
v2.6.25-rc2	commit 101142c37b...	Linus Torvalds	18 years
v2.6.25-rc1	commit 19af35546d...	Linus Torvalds	18 years
v2.6.24	commit 49914084e7...	Linus Torvalds	18 years
v2.6.24-rc8	commit cbd9c88369...	Linus Torvalds	18 years
v2.6.24-rc7	commit 3ce5445046...	Linus Torvalds	18 years
v2.6.24-rc6	commit ea67db4cdb...	Linus Torvalds	18 years
v2.6.24-rc5	commit 82d29bf6dc...	Linus Torvalds	18 years
v2.6.24-rc4	commit 09b56adc98...	Linus Torvalds	18 years
v2.6.24-rc3	commit d9f8bcbf67...	Linus Torvalds	18 years
v2.6.24-rc2	commit dbeeb816e8...	Linus Torvalds	18 years
v2.6.24-rc1	commit c9927c2bf4...	Linus Torvalds	18 years
v2.6.23	commit bbf25010f1...	Linus Torvalds	18 years
v2.6.23-rc9	commit 3146b39c18...	Linus Torvalds	18 years
v2.6.23-rc8	commit 4942de4a0e...	Linus Torvalds	18 years
v2.6.23-rc7	commit 81cfe79b9c...	Linus Torvalds	18 years
v2.6.23-rc6	commit 0d4cbb5e7f...	Linus Torvalds	18 years
v2.6.23-rc5	commit 40ffbfad6b...	Linus Torvalds	18 years
v2.6.23-rc4	commit b07d68b5ca...	Linus Torvalds	18 years
v2.6.23-rc3	commit 39d3520c92...	Linus Torvalds	18 years
v2.6.23-rc2	commit d4ac2477fa...	Linus Torvalds	18 years
v2.6.23-rc1	commit f695baf2df...	Linus Torvalds	18 years
v2.6.22	commit 7dcca30a32...	Linus Torvalds	18 years
v2.6.22-rc7	commit a38d6181ff...	Linus Torvalds	18 years
v2.6.22-rc6	commit 189548642c...	Linus Torvalds	18 years
v2.6.22-rc5	commit 188e1f81ba...	Linus Torvalds	18 years
v2.6.22-rc4	commit 5ecd3100e6...	Linus Torvalds	18 years
v2.6.22-rc3	commit c420bc9f09...	Linus Torvalds	18 years
v2.6.22-rc2	commit 55b637c6a0...	Linus Torvalds	18 years
v2.6.22-rc1	commit 39403865d2...	Linus Torvalds	18 years
v2.6.21	commit de46c33745...	Linus Torvalds	18 years
v2.6.21-rc7	commit 94a05509a9...	Linus Torvalds	18 years
v2.6.21-rc6	commit a21bd69e15...	Linus Torvalds	18 years
v2.6.21-rc5	commit e0f2e3a06b...	Linus Torvalds	18 years
v2.6.21-rc4	commit db98e0b434...	Linus Torvalds	18 years
v2.6.21-rc3	commit 08e15e81a4...	Linus Torvalds	19 years
v2.6.21-rc2	commit 606135a308...	Linus Torvalds	19 years
v2.6.21-rc1	commit c8f71b01a5...	Linus Torvalds	19 years
v2.6.20	commit 62d0cfcb27...	Linus Torvalds	19 years
v2.6.20-rc7	commit f56df2f4db...	Linus Torvalds	19 years
v2.6.20-rc6	commit 99abfeafb5...	Linus Torvalds	19 years
v2.6.20-rc5	commit a8b3485287...	Linus Torvalds	19 years
v2.6.20-rc4	commit bf81b46482...	Linus Torvalds	19 years
v2.6.20-rc3	commit 669df1b478...	Linus Torvalds	19 years
v2.6.20-rc2	commit 3bf8ba38f3...	Linus Torvalds	19 years
v2.6.20-rc1	commit cc016448b0...	Linus Torvalds	19 years
v2.6.19	commit 0215ffb08c...	Linus Torvalds	19 years
v2.6.19-rc6	commit 44597f65f6...	Linus Torvalds	19 years
v2.6.19-rc5	commit 80c2188127...	Linus Torvalds	19 years
v2.6.19-rc4	commit ae99a78af3...	Linus Torvalds	19 years
v2.6.19-rc3	commit 7059abedd2...	Linus Torvalds	19 years
v2.6.19-rc2	commit b4bd8c6643...	Linus Torvalds	19 years
v2.6.19-rc1	commit d223a60106...	Linus Torvalds	19 years
v2.6.18	commit e478bec0ba...	Linus Torvalds	19 years
v2.6.18-rc7	commit 95064a75eb...	Linus Torvalds	19 years
v2.6.18-rc6	commit c336923b66...	Linus Torvalds	19 years
v2.6.18-rc5	commit 60d4684068...	Linus Torvalds	19 years
v2.6.18-rc4	commit 9f737633e6...	Linus Torvalds	19 years
v2.6.18-rc3	commit b6ff50833a...	Linus Torvalds	19 years
v2.6.18-rc2	commit 82d6897fef...	Linus Torvalds	19 years
v2.6.18-rc1	commit 120bda20c6...	Linus Torvalds	19 years
v2.6.17	commit 427abfa28a...	Linus Torvalds	19 years
v2.6.17-rc6	commit 1def630a6a...	Linus Torvalds	19 years
v2.6.17-rc5	commit a8bd60705a...	Linus Torvalds	19 years
v2.6.17-rc4	commit d8c3291c73...	Linus Torvalds	19 years
v2.6.17-rc3	commit 2be4d50295...	Linus Torvalds	19 years
v2.6.17-rc2	commit 8bbde0e6d5...	Linus Torvalds	19 years
v2.6.17-rc1	commit 6246b6128b...	Linus Torvalds	19 years
v2.6.16	commit 7705a8792b...	Linus Torvalds	19 years
v2.6.16-rc6	commit 535744878e...	Linus Torvalds	20 years
v2.6.16-rc5	commit b9a33cebac...	Linus Torvalds	20 years
v2.6.16-rc4	commit bd71c2b174...	Linus Torvalds	20 years
v2.6.16-rc3	commit e9bb4c9929...	Linus Torvalds	20 years
v2.6.16-rc2	commit 826eeb53a6...	Linus Torvalds	20 years
v2.6.16-rc1	commit 2664b25051...	Linus Torvalds	20 years
v2.6.15	commit 88026842b0...	Linus Torvalds	20 years
v2.6.15-rc7	commit f89f5948fc...	Linus Torvalds	20 years
v2.6.15-rc6	commit df7addbb45...	Linus Torvalds	20 years
v2.6.15-rc5	commit 436b0f76f2...	Linus Torvalds	20 years
v2.6.15-rc4	commit 5666c0947e...	Linus Torvalds	20 years
v2.6.15-rc3	commit 624f54be20...	Linus Torvalds	20 years
v2.6.15-rc2	commit 3bedff1d73...	Linus Torvalds	20 years
v2.6.15-rc1	commit cd52d1ee9a...	Linus Torvalds	20 years
v2.6.14	commit 741b2252a5...	Linus Torvalds	20 years
v2.6.14-rc5	commit 93918e9afc...	Linus Torvalds	20 years
v2.6.14-rc4	commit 907a426179...	Linus Torvalds	20 years
v2.6.14-rc3	commit 1c9426e8a5...	Linus Torvalds	20 years
v2.6.14-rc2	commit 676d55ae30...	Linus Torvalds	20 years
v2.6.14-rc1	commit 2f4ba45a75...	Linus Torvalds	20 years
v2.6.13	commit 02b3e4e2d7...	Linus Torvalds	20 years
v2.6.13-rc7	commit 0572e3da3f...	Linus Torvalds	20 years
v2.6.13-rc6	commit 6fc32179de...	Linus Torvalds	20 years
v2.6.13-rc5	commit 9a351e30d7...	Linus Torvalds	20 years
v2.6.13-rc4	commit 6395352334...	Linus Torvalds	20 years
v2.6.11	tree c39ae07f39...
v2.6.11-tree	tree c39ae07f39...
v2.6.12	commit 9ee1c939d1...
v2.6.12-rc2	commit 1da177e4c3...
v2.6.12-rc3	commit a2755a80f4...
v2.6.12-rc4	commit 88d7bd8cb9...
v2.6.12-rc5	commit 2a24ab628a...
v2.6.12-rc6	commit 7cef5677ef...
v2.6.13-rc1	commit 4c91aedb75...
v2.6.13-rc2	commit a18bcb7450...
v2.6.13-rc3	commit c32511e271...

generated by cgit v1.2.2 (git 2.25.0) at 2025-09-08 01:00:39 -0400

/*
 *  Digital Audio (PCM) abstract layer
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/mm.h>
#include <linux/module.h>
#include <linux/file.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/pm_qos.h>
#include <linux/aio.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/info.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/timer.h>
#include <sound/minors.h>
#include <asm/io.h>
#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
#include <dma-coherence.h>
#endif

/*
 *  Compatibility
 */

struct snd_pcm_hw_params_old {
	unsigned int flags;
	unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
			   SNDRV_PCM_HW_PARAM_ACCESS + 1];
	struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
					SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
	unsigned int rmask;
	unsigned int cmask;
	unsigned int info;
	unsigned int msbits;
	unsigned int rate_num;
	unsigned int rate_den;
	snd_pcm_uframes_t fifo_size;
	unsigned char reserved[64];
};

#ifdef CONFIG_SND_SUPPORT_OLD_API
#define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
#define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)

static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params_old __user * _oparams);
static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params_old __user * _oparams);
#endif
static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);

/*
 *
 */

DEFINE_RWLOCK(snd_pcm_link_rwlock);
EXPORT_SYMBOL(snd_pcm_link_rwlock);

static DECLARE_RWSEM(snd_pcm_link_rwsem);

static inline mm_segment_t snd_enter_user(void)
{
	mm_segment_t fs = get_fs();
	set_fs(get_ds());
	return fs;
}

static inline void snd_leave_user(mm_segment_t fs)
{
	set_fs(fs);
}



int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
{
	struct snd_pcm_runtime *runtime;
	struct snd_pcm *pcm = substream->pcm;
	struct snd_pcm_str *pstr = substream->pstr;

	memset(info, 0, sizeof(*info));
	info->card = pcm->card->number;
	info->device = pcm->device;
	info->stream = substream->stream;
	info->subdevice = substream->number;
	strlcpy(info->id, pcm->id, sizeof(info->id));
	strlcpy(info->name, pcm->name, sizeof(info->name));
	info->dev_class = pcm->dev_class;
	info->dev_subclass = pcm->dev_subclass;
	info->subdevices_count = pstr->substream_count;
	info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
	strlcpy(info->subname, substream->name, sizeof(info->subname));
	runtime = substream->runtime;
	/* AB: FIXME!!! This is definitely nonsense */
	if (runtime) {
		info->sync = runtime->sync;
		substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
	}
	return 0;
}

int snd_pcm_info_user(struct snd_pcm_substream *substream,
		      struct snd_pcm_info __user * _info)
{
	struct snd_pcm_info *info;
	int err;

	info = kmalloc(sizeof(*info), GFP_KERNEL);
	if (! info)
		return -ENOMEM;
	err = snd_pcm_info(substream, info);
	if (err >= 0) {
		if (copy_to_user(_info, info, sizeof(*info)))
			err = -EFAULT;
	}
	kfree(info);
	return err;
}

#undef RULES_DEBUG

#ifdef RULES_DEBUG
#define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
static const char * const snd_pcm_hw_param_names[] = {
	HW_PARAM(ACCESS),
	HW_PARAM(FORMAT),
	HW_PARAM(SUBFORMAT),
	HW_PARAM(SAMPLE_BITS),
	HW_PARAM(FRAME_BITS),
	HW_PARAM(CHANNELS),
	HW_PARAM(RATE),
	HW_PARAM(PERIOD_TIME),
	HW_PARAM(PERIOD_SIZE),
	HW_PARAM(PERIOD_BYTES),
	HW_PARAM(PERIODS),
	HW_PARAM(BUFFER_TIME),
	HW_PARAM(BUFFER_SIZE),
	HW_PARAM(BUFFER_BYTES),
	HW_PARAM(TICK_TIME),
};
#endif

int snd_pcm_hw_refine(struct snd_pcm_substream *substream, 
		      struct snd_pcm_hw_params *params)
{
	unsigned int k;
	struct snd_pcm_hardware *hw;
	struct snd_interval *i = NULL;
	struct snd_mask *m = NULL;
	struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
	unsigned int rstamps[constrs->rules_num];
	unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
	unsigned int stamp = 2;
	int changed, again;

	params->info = 0;
	params->fifo_size = 0;
	if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
		params->msbits = 0;
	if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
		params->rate_num = 0;
		params->rate_den = 0;
	}

	for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
		m = hw_param_mask(params, k);
		if (snd_mask_empty(m))
			return -EINVAL;
		if (!(params->rmask & (1 << k)))
			continue;
#ifdef RULES_DEBUG
		printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
		printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
#endif
		changed = snd_mask_refine(m, constrs_mask(constrs, k));
#ifdef RULES_DEBUG
		printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
#endif
		if (changed)
			params->cmask |= 1 << k;
		if (changed < 0)
			return changed;
	}

	for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
		i = hw_param_interval(params, k);
		if (snd_interval_empty(i))
			return -EINVAL;
		if (!(params->rmask & (1 << k)))
			continue;
#ifdef RULES_DEBUG
		printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
		if (i->empty)
			printk("empty");
		else
			printk("%c%u %u%c", 
			       i->openmin ? '(' : '[', i->min,
			       i->max, i->openmax ? ')' : ']');
		printk(" -> ");
#endif
		changed = snd_interval_refine(i, constrs_interval(constrs, k));
#ifdef RULES_DEBUG
		if (i->empty)
			printk("empty\n");
		else 
			printk("%c%u %u%c\n", 
			       i->openmin ? '(' : '[', i->min,
			       i->max, i->openmax ? ')' : ']');
#endif
		if (changed)
			params->cmask |= 1 << k;
		if (changed < 0)
			return changed;
	}

	for (k = 0; k < constrs->rules_num; k++)
		rstamps[k] = 0;
	for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 
		vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
	do {
		again = 0;
		for (k = 0; k < constrs->rules_num; k++) {
			struct snd_pcm_hw_rule *r = &constrs->rules[k];
			unsigned int d;
			int doit = 0;
			if (r->cond && !(r->cond & params->flags))
				continue;
			for (d = 0; r->deps[d] >= 0; d++) {
				if (vstamps[r->deps[d]] > rstamps[k]) {
					doit = 1;
					break;
				}
			}
			if (!doit)
				continue;
#ifdef RULES_DEBUG
			printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
			if (r->var >= 0) {
				printk("%s = ", snd_pcm_hw_param_names[r->var]);
				if (hw_is_mask(r->var)) {
					m = hw_param_mask(params, r->var);
					printk("%x", *m->bits);
				} else {
					i = hw_param_interval(params, r->var);
					if (i->empty)
						printk("empty");
					else
						printk("%c%u %u%c", 
						       i->openmin ? '(' : '[', i->min,
						       i->max, i->openmax ? ')' : ']');
				}
			}
#endif
			changed = r->func(params, r);
#ifdef RULES_DEBUG
			if (r->var >= 0) {
				printk(" -> ");
				if (hw_is_mask(r->var))
					printk("%x", *m->bits);
				else {
					if (i->empty)
						printk("empty");
					else
						printk("%c%u %u%c", 
						       i->openmin ? '(' : '[', i->min,
						       i->max, i->openmax ? ')' : ']');
				}
			}
			printk("\n");
#endif
			rstamps[k] = stamp;
			if (changed && r->var >= 0) {
				params->cmask |= (1 << r->var);
				vstamps[r->var] = stamp;
				again = 1;
			}
			if (changed < 0)
				return changed;
			stamp++;
		}
	} while (again);
	if (!params->msbits) {
		i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
		if (snd_interval_single(i))
			params->msbits = snd_interval_value(i);
	}

	if (!params->rate_den) {
		i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
		if (snd_interval_single(i)) {
			params->rate_num = snd_interval_value(i);
			params->rate_den = 1;
		}
	}

	hw = &substream->runtime->hw;
	if (!params->info)
		params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
	if (!params->fifo_size) {
		m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
		i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
		if (snd_mask_min(m) == snd_mask_max(m) &&
                    snd_interval_min(i) == snd_interval_max(i)) {
			changed = substream->ops->ioctl(substream,
					SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
			if (changed < 0)
				return changed;
		}
	}
	params->rmask = 0;
	return 0;
}

EXPORT_SYMBOL(snd_pcm_hw_refine);

static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params __user * _params)
{
	struct snd_pcm_hw_params *params;
	int err;

	params = memdup_user(_params, sizeof(*params));
	if (IS_ERR(params))
		return PTR_ERR(params);

	err = snd_pcm_hw_refine(substream, params);
	if (copy_to_user(_params, params, sizeof(*params))) {
		if (!err)
			err = -EFAULT;
	}

	kfree(params);
	return err;
}

static int period_to_usecs(struct snd_pcm_runtime *runtime)
{
	int usecs;

	if (! runtime->rate)
		return -1; /* invalid */

	/* take 75% of period time as the deadline */
	usecs = (750000 / runtime->rate) * runtime->period_size;
	usecs += ((750000 % runtime->rate) * runtime->period_size) /
		runtime->rate;

	return usecs;
}

static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
{
	snd_pcm_stream_lock_irq(substream);
	if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
		substream->runtime->status->state = state;
	snd_pcm_stream_unlock_irq(substream);
}

static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params)
{
	struct snd_pcm_runtime *runtime;
	int err, usecs;
	unsigned int bits;
	snd_pcm_uframes_t frames;

	if (PCM_RUNTIME_CHECK(substream))
		return -ENXIO;
	runtime = substream->runtime;
	snd_pcm_stream_lock_irq(substream);
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_OPEN:
	case SNDRV_PCM_STATE_SETUP:
	case SNDRV_PCM_STATE_PREPARED:
		break;
	default:
		snd_pcm_stream_unlock_irq(substream);
		return -EBADFD;
	}
	snd_pcm_stream_unlock_irq(substream);
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
	if (!substream->oss.oss)
#endif
		if (atomic_read(&substream->mmap_count))
			return -EBADFD;

	params->rmask = ~0U;
	err = snd_pcm_hw_refine(substream, params);
	if (err < 0)
		goto _error;

	err = snd_pcm_hw_params_choose(substream, params);
	if (err < 0)
		goto _error;

	if (substream->ops->hw_params != NULL) {
		err = substream->ops->hw_params(substream, params);
		if (err < 0)
			goto _error;
	}

	runtime->access = params_access(params);
	runtime->format = params_format(params);
	runtime->subformat = params_subformat(params);
	runtime->channels = params_channels(params);
	runtime->rate = params_rate(params);
	runtime->period_size = params_period_size(params);
	runtime->periods = params_periods(params);
	runtime->buffer_size = params_buffer_size(params);
	runtime->info = params->info;
	runtime->rate_num = params->rate_num;
	runtime->rate_den = params->rate_den;
	runtime->no_period_wakeup =
			(params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
			(params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);

	bits = snd_pcm_format_physical_width(runtime->format);
	runtime->sample_bits = bits;
	bits *= runtime->channels;
	runtime->frame_bits = bits;
	frames = 1;
	while (bits % 8 != 0) {
		bits *= 2;
		frames *= 2;
	}
	runtime->byte_align = bits / 8;
	runtime->min_align = frames;

	/* Default sw params */
	runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
	runtime->period_step = 1;
	runtime->control->avail_min = runtime->period_size;
	runtime->start_threshold = 1;
	runtime->stop_threshold = runtime->buffer_size;
	runtime->silence_threshold = 0;
	runtime->silence_size = 0;
	runtime->boundary = runtime->buffer_size;
	while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
		runtime->boundary *= 2;

	snd_pcm_timer_resolution_change(substream);
	snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);

	if (pm_qos_request_active(&substream->latency_pm_qos_req))
		pm_qos_remove_request(&substream->latency_pm_qos_req);
	if ((usecs = period_to_usecs(runtime)) >= 0)
		pm_qos_add_request(&substream->latency_pm_qos_req,
				   PM_QOS_CPU_DMA_LATENCY, usecs);
	return 0;
 _error:
	/* hardware might be unusable from this time,
	   so we force application to retry to set
	   the correct hardware parameter settings */
	snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
	if (substream->ops->hw_free != NULL)
		substream->ops->hw_free(substream);
	return err;
}

static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params __user * _params)
{
	struct snd_pcm_hw_params *params;
	int err;

	params = memdup_user(_params, sizeof(*params));
	if (IS_ERR(params))
		return PTR_ERR(params);

	err = snd_pcm_hw_params(substream, params);
	if (copy_to_user(_params, params, sizeof(*params))) {
		if (!err)
			err = -EFAULT;
	}

	kfree(params);
	return err;
}

static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime;
	int result = 0;

	if (PCM_RUNTIME_CHECK(substream))
		return -ENXIO;
	runtime = substream->runtime;
	snd_pcm_stream_lock_irq(substream);
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_SETUP:
	case SNDRV_PCM_STATE_PREPARED:
		break;
	default:
		snd_pcm_stream_unlock_irq(substream);
		return -EBADFD;
	}
	snd_pcm_stream_unlock_irq(substream);
	if (atomic_read(&substream->mmap_count))
		return -EBADFD;
	if (substream->ops->hw_free)
		result = substream->ops->hw_free(substream);
	snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
	pm_qos_remove_request(&substream->latency_pm_qos_req);
	return result;
}

static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_sw_params *params)
{
	struct snd_pcm_runtime *runtime;
	int err;

	if (PCM_RUNTIME_CHECK(substream))
		return -ENXIO;
	runtime = substream->runtime;
	snd_pcm_stream_lock_irq(substream);
	if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
		snd_pcm_stream_unlock_irq(substream);
		return -EBADFD;
	}
	snd_pcm_stream_unlock_irq(substream);

	if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
		return -EINVAL;
	if (params->avail_min == 0)
		return -EINVAL;
	if (params->silence_size >= runtime->boundary) {
		if (params->silence_threshold != 0)
			return -EINVAL;
	} else {
		if (params->silence_size > params->silence_threshold)
			return -EINVAL;
		if (params->silence_threshold > runtime->buffer_size)
			return -EINVAL;
	}
	err = 0;
	snd_pcm_stream_lock_irq(substream);
	runtime->tstamp_mode = params->tstamp_mode;
	runtime->period_step = params->period_step;
	runtime->control->avail_min = params->avail_min;
	runtime->start_threshold = params->start_threshold;
	runtime->stop_threshold = params->stop_threshold;
	runtime->silence_threshold = params->silence_threshold;
	runtime->silence_size = params->silence_size;
        params->boundary = runtime->boundary;
	if (snd_pcm_running(substream)) {
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
		    runtime->silence_size > 0)
			snd_pcm_playback_silence(substream, ULONG_MAX);
		err = snd_pcm_update_state(substream, runtime);
	}
	snd_pcm_stream_unlock_irq(substream);
	return err;
}

static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
				  struct snd_pcm_sw_params __user * _params)
{
	struct snd_pcm_sw_params params;
	int err;
	if (copy_from_user(&params, _params, sizeof(params)))
		return -EFAULT;
	err = snd_pcm_sw_params(substream, &params);
	if (copy_to_user(_params, &params, sizeof(params)))
		return -EFAULT;
	return err;
}

int snd_pcm_status(struct snd_pcm_substream *substream,
		   struct snd_pcm_status *status)
{
	struct snd_pcm_runtime *runtime = substream->runtime;

	snd_pcm_stream_lock_irq(substream);
	status->state = runtime->status->state;
	status->suspended_state = runtime->status->suspended_state;
	if (status->state == SNDRV_PCM_STATE_OPEN)
		goto _end;
	status->trigger_tstamp = runtime->trigger_tstamp;
	if (snd_pcm_running(substream)) {
		snd_pcm_update_hw_ptr(substream);
		if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
			status->tstamp = runtime->status->tstamp;
			status->audio_tstamp =
				runtime->status->audio_tstamp;
			goto _tstamp_end;
		}
	}
	snd_pcm_gettime(runtime, &status->tstamp);
 _tstamp_end:
	status->appl_ptr = runtime->control->appl_ptr;
	status->hw_ptr = runtime->status->hw_ptr;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		status->avail = snd_pcm_playback_avail(runtime);
		if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
		    runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
			status->delay = runtime->buffer_size - status->avail;
			status->delay += runtime->delay;
		} else
			status->delay = 0;
	} else {
		status->avail = snd_pcm_capture_avail(runtime);
		if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
			status->delay = status->avail + runtime->delay;
		else
			status->delay = 0;
	}
	status->avail_max = runtime->avail_max;
	status->overrange = runtime->overrange;
	runtime->avail_max = 0;
	runtime->overrange = 0;
 _end:
 	snd_pcm_stream_unlock_irq(substream);
	return 0;
}

static int snd_pcm_status_user(struct snd_pcm_substream *substream,
			       struct snd_pcm_status __user * _status)
{
	struct snd_pcm_status status;
	int res;
	
	memset(&status, 0, sizeof(status));
	res = snd_pcm_status(substream, &status);
	if (res < 0)
		return res;
	if (copy_to_user(_status, &status, sizeof(status)))
		return -EFAULT;
	return 0;
}

static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
				struct snd_pcm_channel_info * info)
{
	struct snd_pcm_runtime *runtime;
	unsigned int channel;
	
	channel = info->channel;
	runtime = substream->runtime;
	snd_pcm_stream_lock_irq(substream);
	if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
		snd_pcm_stream_unlock_irq(substream);
		return -EBADFD;
	}
	snd_pcm_stream_unlock_irq(substream);
	if (channel >= runtime->channels)
		return -EINVAL;
	memset(info, 0, sizeof(*info));
	info->channel = channel;
	return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
}

static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
				     struct snd_pcm_channel_info __user * _info)
{
	struct snd_pcm_channel_info info;
	int res;
	
	if (copy_from_user(&info, _info, sizeof(info)))
		return -EFAULT;
	res = snd_pcm_channel_info(substream, &info);
	if (res < 0)
		return res;
	if (copy_to_user(_info, &info, sizeof(info)))
		return -EFAULT;
	return 0;
}

static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->trigger_master == NULL)
		return;
	if (runtime->trigger_master == substream) {
		snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
	} else {
		snd_pcm_trigger_tstamp(runtime->trigger_master);
		runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
	}
	runtime->trigger_master = NULL;
}

struct action_ops {
	int (*pre_action)(struct snd_pcm_substream *substream, int state);
	int (*do_action)(struct snd_pcm_substream *substream, int state);
	void (*undo_action)(struct snd_pcm_substream *substream, int state);
	void (*post_action)(struct snd_pcm_substream *substream, int state);
};

/*
 *  this functions is core for handling of linked stream
 *  Note: the stream state might be changed also on failure
 *  Note2: call with calling stream lock + link lock
 */
static int snd_pcm_action_group(struct action_ops *ops,
				struct snd_pcm_substream *substream,
				int state, int do_lock)
{
	struct snd_pcm_substream *s = NULL;
	struct snd_pcm_substream *s1;
	int res = 0;

	snd_pcm_group_for_each_entry(s, substream) {
		if (do_lock && s != substream)
			spin_lock_nested(&s->self_group.lock,
					 SINGLE_DEPTH_NESTING);
		res = ops->pre_action(s, state);
		if (res < 0)
			goto _unlock;
	}
	snd_pcm_group_for_each_entry(s, substream) {
		res = ops->do_action(s, state);
		if (res < 0) {
			if (ops->undo_action) {
				snd_pcm_group_for_each_entry(s1, substream) {
					if (s1 == s) /* failed stream */
						break;
					ops->undo_action(s1, state);
				}
			}
			s = NULL; /* unlock all */
			goto _unlock;
		}
	}
	snd_pcm_group_for_each_entry(s, substream) {
		ops->post_action(s, state);
	}
 _unlock:
	if (do_lock) {
		/* unlock streams */
		snd_pcm_group_for_each_entry(s1, substream) {
			if (s1 != substream)
				spin_unlock(&s1->self_group.lock);
			if (s1 == s)	/* end */
				break;
		}
	}
	return res;
}

/*
 *  Note: call with stream lock
 */
static int snd_pcm_action_single(struct action_ops *ops,
				 struct snd_pcm_substream *substream,
				 int state)
{
	int res;
	
	res = ops->pre_action(substream, state);
	if (res < 0)
		return res;
	res = ops->do_action(substream, state);
	if (res == 0)
		ops->post_action(substream, state);
	else if (ops->undo_action)
		ops->undo_action(substream, state);
	return res;
}

/*
 *  Note: call with stream lock
 */
static int snd_pcm_action(struct action_ops *ops,
			  struct snd_pcm_substream *substream,
			  int state)
{
	int res;

	if (snd_pcm_stream_linked(substream)) {
		if (!spin_trylock(&substream->group->lock)) {
			spin_unlock(&substream->self_group.lock);
			spin_lock(&substream->group->lock);
			spin_lock(&substream->self_group.lock);
		}
		res = snd_pcm_action_group(ops, substream, state, 1);
		spin_unlock(&substream->group->lock);
	} else {
		res = snd_pcm_action_single(ops, substream, state);
	}
	return res;
}

/*
 *  Note: don't use any locks before
 */
static int snd_pcm_action_lock_irq(struct action_ops *ops,
				   struct snd_pcm_substream *substream,
				   int state)
{
	int res;

	read_lock_irq(&snd_pcm_link_rwlock);
	if (snd_pcm_stream_linked(substream)) {
		spin_lock(&substream->group->lock);
		spin_lock(&substream->self_group.lock);
		res = snd_pcm_action_group(ops, substream, state, 1);
		spin_unlock(&substream->self_group.lock);
		spin_unlock(&substream->group->lock);
	} else {
		spin_lock(&substream->self_group.lock);
		res = snd_pcm_action_single(ops, substream, state);
		spin_unlock(&substream->self_group.lock);
	}
	read_unlock_irq(&snd_pcm_link_rwlock);
	return res;
}

/*
 */
static int snd_pcm_action_nonatomic(struct action_ops *ops,
				    struct snd_pcm_substream *substream,
				    int state)
{
	int res;

	down_read(&snd_pcm_link_rwsem);
	if (snd_pcm_stream_linked(substream))
		res = snd_pcm_action_group(ops, substream, state, 0);
	else
		res = snd_pcm_action_single(ops, substream, state);
	up_read(&snd_pcm_link_rwsem);
	return res;
}

/*
 * start callbacks
 */
static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
		return -EBADFD;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    !snd_pcm_playback_data(substream))
		return -EPIPE;
	runtime->trigger_master = substream;
	return 0;
}

static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
{
	if (substream->runtime->trigger_master != substream)
		return 0;
	return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
}

static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
{
	if (substream->runtime->trigger_master == substream)
		substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
}

static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_trigger_tstamp(substream);
	runtime->hw_ptr_jiffies = jiffies;
	runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) / 
							    runtime->rate;
	runtime->status->state = state;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    runtime->silence_size > 0)
		snd_pcm_playback_silence(substream, ULONG_MAX);
	if (substream->timer)
		snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
				 &runtime->trigger_tstamp);
}

static struct action_ops snd_pcm_action_start = {
	.pre_action = snd_pcm_pre_start,
	.do_action = snd_pcm_do_start,
	.undo_action = snd_pcm_undo_start,
	.post_action = snd_pcm_post_start
};

/**
 * snd_pcm_start - start all linked streams
 * @substream: the PCM substream instance
 *
 * Return: Zero if successful, or a negative error code.
 */
int snd_pcm_start(struct snd_pcm_substream *substream)
{
	return snd_pcm_action(&snd_pcm_action_start, substream,
			      SNDRV_PCM_STATE_RUNNING);
}

/*
 * stop callbacks
 */
static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
		return -EBADFD;
	runtime->trigger_master = substream;
	return 0;
}

static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
{
	if (substream->runtime->trigger_master == substream &&
	    snd_pcm_running(substream))
		substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
	return 0; /* unconditonally stop all substreams */
}

static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state != state) {
		snd_pcm_trigger_tstamp(substream);
		if (substream->timer)
			snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
					 &runtime->trigger_tstamp);
		runtime->status->state = state;
	}
	wake_up(&runtime->sleep);
	wake_up(&runtime->tsleep);
}

static struct action_ops snd_pcm_action_stop = {
	.pre_action = snd_pcm_pre_stop,
	.do_action = snd_pcm_do_stop,
	.post_action = snd_pcm_post_stop
};

/**
 * snd_pcm_stop - try to stop all running streams in the substream group
 * @substream: the PCM substream instance
 * @state: PCM state after stopping the stream
 *
 * The state of each stream is then changed to the given state unconditionally.
 *
 * Return: Zero if succesful, or a negative error code.
 */
int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
{
	return snd_pcm_action(&snd_pcm_action_stop, substream, state);
}

EXPORT_SYMBOL(snd_pcm_stop);

/**
 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 * @substream: the PCM substream
 *
 * After stopping, the state is changed to SETUP.
 * Unlike snd_pcm_stop(), this affects only the given stream.
 *
 * Return: Zero if succesful, or a negative error code.
 */
int snd_pcm_drain_done(struct snd_pcm_substream *substream)
{
	return snd_pcm_action_single(&snd_pcm_action_stop, substream,
				     SNDRV_PCM_STATE_SETUP);
}

/*
 * pause callbacks
 */
static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
		return -ENOSYS;
	if (push) {
		if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
			return -EBADFD;
	} else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
		return -EBADFD;
	runtime->trigger_master = substream;
	return 0;
}

static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
{
	if (substream->runtime->trigger_master != substream)
		return 0;
	/* some drivers might use hw_ptr to recover from the pause -
	   update the hw_ptr now */
	if (push)
		snd_pcm_update_hw_ptr(substream);
	/* The jiffies check in snd_pcm_update_hw_ptr*() is done by
	 * a delta between the current jiffies, this gives a large enough
	 * delta, effectively to skip the check once.
	 */
	substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
	return substream->ops->trigger(substream,
				       push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
					      SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
}

static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
{
	if (substream->runtime->trigger_master == substream)
		substream->ops->trigger(substream,
					push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
					SNDRV_PCM_TRIGGER_PAUSE_PUSH);
}

static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_trigger_tstamp(substream);
	if (push) {
		runtime->status->state = SNDRV_PCM_STATE_PAUSED;
		if (substream->timer)
			snd_timer_notify(substream->timer,
					 SNDRV_TIMER_EVENT_MPAUSE,
					 &runtime->trigger_tstamp);
		wake_up(&runtime->sleep);
		wake_up(&runtime->tsleep);
	} else {
		runtime->status->state = SNDRV_PCM_STATE_RUNNING;
		if (substream->timer)
			snd_timer_notify(substream->timer,
					 SNDRV_TIMER_EVENT_MCONTINUE,
					 &runtime->trigger_tstamp);
	}
}

static struct action_ops snd_pcm_action_pause = {
	.pre_action = snd_pcm_pre_pause,
	.do_action = snd_pcm_do_pause,
	.undo_action = snd_pcm_undo_pause,
	.post_action = snd_pcm_post_pause
};

/*
 * Push/release the pause for all linked streams.
 */
static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
{
	return snd_pcm_action(&snd_pcm_action_pause, substream, push);
}

#ifdef CONFIG_PM
/* suspend */

static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
		return -EBUSY;
	runtime->trigger_master = substream;
	return 0;
}

static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->trigger_master != substream)
		return 0;
	if (! snd_pcm_running(substream))
		return 0;
	substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
	return 0; /* suspend unconditionally */
}

static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_trigger_tstamp(substream);
	if (substream->timer)
		snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
				 &runtime->trigger_tstamp);
	runtime->status->suspended_state = runtime->status->state;
	runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
	wake_up(&runtime->sleep);
	wake_up(&runtime->tsleep);
}

static struct action_ops snd_pcm_action_suspend = {
	.pre_action = snd_pcm_pre_suspend,
	.do_action = snd_pcm_do_suspend,
	.post_action = snd_pcm_post_suspend
};

/**
 * snd_pcm_suspend - trigger SUSPEND to all linked streams
 * @substream: the PCM substream
 *
 * After this call, all streams are changed to SUSPENDED state.
 *
 * Return: Zero if successful (or @substream is %NULL), or a negative error
 * code.
 */
int snd_pcm_suspend(struct snd_pcm_substream *substream)
{
	int err;
	unsigned long flags;

	if (! substream)
		return 0;

	snd_pcm_stream_lock_irqsave(substream, flags);
	err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
	snd_pcm_stream_unlock_irqrestore(substream, flags);
	return err;
}

EXPORT_SYMBOL(snd_pcm_suspend);

/**
 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
 * @pcm: the PCM instance
 *
 * After this call, all streams are changed to SUSPENDED state.
 *
 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
 */
int snd_pcm_suspend_all(struct snd_pcm *pcm)
{
	struct snd_pcm_substream *substream;
	int stream, err = 0;

	if (! pcm)
		return 0;

	for (stream = 0; stream < 2; stream++) {
		for (substream = pcm->streams[stream].substream;
		     substream; substream = substream->next) {
			/* FIXME: the open/close code should lock this as well */
			if (substream->runtime == NULL)
				continue;
			err = snd_pcm_suspend(substream);
			if (err < 0 && err != -EBUSY)
				return err;
		}
	}
	return 0;
}

EXPORT_SYMBOL(snd_pcm_suspend_all);

/* resume */

static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
		return -ENOSYS;
	runtime->trigger_master = substream;
	return 0;
}

static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->trigger_master != substream)
		return 0;
	/* DMA not running previously? */
	if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
	    (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
	     substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
		return 0;
	return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
}

static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
{
	if (substream->runtime->trigger_master == substream &&
	    snd_pcm_running(substream))
		substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
}

static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	snd_pcm_trigger_tstamp(substream);
	if (substream->timer)
		snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
				 &runtime->trigger_tstamp);
	runtime->status->state = runtime->status->suspended_state;
}

static struct action_ops snd_pcm_action_resume = {
	.pre_action = snd_pcm_pre_resume,
	.do_action = snd_pcm_do_resume,
	.undo_action = snd_pcm_undo_resume,
	.post_action = snd_pcm_post_resume
};

static int snd_pcm_resume(struct snd_pcm_substream *substream)
{
	struct snd_card *card = substream->pcm->card;
	int res;

	snd_power_lock(card);
	if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
		res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
	snd_power_unlock(card);
	return res;
}

#else

static int snd_pcm_resume(struct snd_pcm_substream *substream)
{
	return -ENOSYS;
}

#endif /* CONFIG_PM */

/*
 * xrun ioctl
 *
 * Change the RUNNING stream(s) to XRUN state.
 */
static int snd_pcm_xrun(struct snd_pcm_substream *substream)
{
	struct snd_card *card = substream->pcm->card;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int result;

	snd_power_lock(card);
	if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
		result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
		if (result < 0)
			goto _unlock;
	}

	snd_pcm_stream_lock_irq(substream);
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_XRUN:
		result = 0;	/* already there */
		break;
	case SNDRV_PCM_STATE_RUNNING:
		result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
		break;
	default:
		result = -EBADFD;
	}
	snd_pcm_stream_unlock_irq(substream);
 _unlock:
	snd_power_unlock(card);
	return result;
}

/*
 * reset ioctl
 */
static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_RUNNING:
	case SNDRV_PCM_STATE_PREPARED:
	case SNDRV_PCM_STATE_PAUSED:
	case SNDRV_PCM_STATE_SUSPENDED:
		return 0;
	default:
		return -EBADFD;
	}
}

static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
	if (err < 0)
		return err;
	runtime->hw_ptr_base = 0;
	runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
		runtime->status->hw_ptr % runtime->period_size;
	runtime->silence_start = runtime->status->hw_ptr;
	runtime->silence_filled = 0;
	return 0;
}

static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	runtime->control->appl_ptr = runtime->status->hw_ptr;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    runtime->silence_size > 0)
		snd_pcm_playback_silence(substream, ULONG_MAX);
}

static struct action_ops snd_pcm_action_reset = {
	.pre_action = snd_pcm_pre_reset,
	.do_action = snd_pcm_do_reset,
	.post_action = snd_pcm_post_reset
};

static int snd_pcm_reset(struct snd_pcm_substream *substream)
{
	return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
}

/*
 * prepare ioctl
 */
/* we use the second argument for updating f_flags */
static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
			       int f_flags)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
	    runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
		return -EBADFD;
	if (snd_pcm_running(substream))
		return -EBUSY;
	substream->f_flags = f_flags;
	return 0;
}

static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
{
	int err;
	err = substream->ops->prepare(substream);
	if (err < 0)
		return err;
	return snd_pcm_do_reset(substream, 0);
}

static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	runtime->control->appl_ptr = runtime->status->hw_ptr;
	snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
}

static struct action_ops snd_pcm_action_prepare = {
	.pre_action = snd_pcm_pre_prepare,
	.do_action = snd_pcm_do_prepare,
	.post_action = snd_pcm_post_prepare
};

/**
 * snd_pcm_prepare - prepare the PCM substream to be triggerable
 * @substream: the PCM substream instance
 * @file: file to refer f_flags
 *
 * Return: Zero if successful, or a negative error code.
 */
static int snd_pcm_prepare(struct snd_pcm_substream *substream,
			   struct file *file)
{
	int res;
	struct snd_card *card = substream->pcm->card;
	int f_flags;

	if (file)
		f_flags = file->f_flags;
	else
		f_flags = substream->f_flags;

	snd_power_lock(card);
	if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
		res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
					       substream, f_flags);
	snd_power_unlock(card);
	return res;
}

/*
 * drain ioctl
 */

static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	switch (runtime->status->state) {
	case SNDRV_PCM_STATE_OPEN:
	case SNDRV_PCM_STATE_DISCONNECTED:
	case SNDRV_PCM_STATE_SUSPENDED:
		return -EBADFD;
	}
	runtime->trigger_master = substream;
	return 0;
}

static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		switch (runtime->status->state) {
		case SNDRV_PCM_STATE_PREPARED:
			/* start playback stream if possible */
			if (! snd_pcm_playback_empty(substream)) {
				snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
				snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
			}
			break;
		case SNDRV_PCM_STATE_RUNNING:
			runtime->status->state = SNDRV_PCM_STATE_DRAINING;
			break;
		case SNDRV_PCM_STATE_XRUN:
			runtime->status->state = SNDRV_PCM_STATE_SETUP;
			break;
		default:
			break;
		}
	} else {
		/* stop running stream */
		if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
			int new_state = snd_pcm_capture_avail(runtime) > 0 ?
				SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
			snd_pcm_do_stop(substream, new_state);
			snd_pcm_post_stop(substream, new_state);
		}
	}
	return 0;
}

static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
{
}

static struct action_ops snd_pcm_action_drain_init = {
	.pre_action = snd_pcm_pre_drain_init,
	.do_action = snd_pcm_do_drain_init,
	.post_action = snd_pcm_post_drain_init
};

static int snd_pcm_drop(struct snd_pcm_substream *substream);

/*
 * Drain the stream(s).
 * When the substream is linked, sync until the draining of all playback streams
 * is finished.
 * After this call, all streams are supposed to be either SETUP or DRAINING
 * (capture only) state.
 */
static int snd_pcm_drain(struct snd_pcm_substream *substream,
			 struct file *file)
{
	struct snd_card *card;
	struct snd_pcm_runtime *runtime;
	struct snd_pcm_substream *s;
	wait_queue_t wait;
	int result = 0;
	int nonblock = 0;

	card = substream->pcm->card;
	runtime = substream->runtime;

	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
		return -EBADFD;

	snd_power_lock(card);
	if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
		result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
		if (result < 0) {
			snd_power_unlock(card);
			return result;
		}
	}

	if (file) {
		if (file->f_flags & O_NONBLOCK)
			nonblock = 1;
	} else if (substream->f_flags & O_NONBLOCK)
		nonblock = 1;

	down_read(&snd_pcm_link_rwsem);
	snd_pcm_stream_lock_irq(substream);
	/* resume pause */
	if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
		snd_pcm_pause(substream, 0);

	/* pre-start/stop - all running streams are changed to DRAINING state */
	result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
	if (result < 0)
		goto unlock;
	/* in non-blocking, we don't wait in ioctl but let caller poll */
	if (nonblock) {
		result = -EAGAIN;
		goto unlock;
	}

	for (;;) {
		long tout;
		struct snd_pcm_runtime *to_check;
		if (signal_pending(current)) {
			result = -ERESTARTSYS;
			break;
		}
		/* find a substream to drain */
		to_check = NULL;
		snd_pcm_group_for_each_entry(s, substream) {
			if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
				continue;
			runtime = s->runtime;
			if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
				to_check = runtime;
				break;
			}
		}
		if (!to_check)
			break; /* all drained */
		init_waitqueue_entry(&wait, current);
		add_wait_queue(&to_check->sleep, &wait);
		snd_pcm_stream_unlock_irq(substream);
		up_read(&snd_pcm_link_rwsem);
		snd_power_unlock(card);
		if (runtime->no_period_wakeup)
			tout = MAX_SCHEDULE_TIMEOUT;
		else {
			tout = 10;
			if (runtime->rate) {
				long t = runtime->period_size * 2 / runtime->rate;
				tout = max(t, tout);
			}
			tout = msecs_to_jiffies(tout * 1000);
		}
		tout = schedule_timeout_interruptible(tout);
		snd_power_lock(card);
		down_read(&snd_pcm_link_rwsem);
		snd_pcm_stream_lock_irq(substream);
		remove_wait_queue(&to_check->sleep, &wait);
		if (card->shutdown) {
			result = -ENODEV;
			break;
		}
		if (tout == 0) {
			if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
				result = -ESTRPIPE;
			else {
				snd_printd("playback drain error (DMA or IRQ trouble?)\n");
				snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
				result = -EIO;
			}
			break;
		}
	}

 unlock:
	snd_pcm_stream_unlock_irq(substream);
	up_read(&snd_pcm_link_rwsem);
	snd_power_unlock(card);

	return result;
}

/*
 * drop ioctl
 *
 * Immediately put all linked substreams into SETUP state.
 */
static int snd_pcm_drop(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime;
	int result = 0;
	
	if (PCM_RUNTIME_CHECK(substream))
		return -ENXIO;
	runtime = substream->runtime;

	if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
	    runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
	    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
		return -EBADFD;

	snd_pcm_stream_lock_irq(substream);
	/* resume pause */
	if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
		snd_pcm_pause(substream, 0);

	snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
	/* runtime->control->appl_ptr = runtime->status->hw_ptr; */
	snd_pcm_stream_unlock_irq(substream);

	return result;
}


static bool is_pcm_file(struct file *file)
{
	struct inode *inode = file_inode(file);
	unsigned int minor;

	if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
		return false;
	minor = iminor(inode);
	return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
		snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
}

/*
 * PCM link handling
 */
static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
{
	int res = 0;
	struct snd_pcm_file *pcm_file;
	struct snd_pcm_substream *substream1;
	struct snd_pcm_group *group;
	struct fd f = fdget(fd);

	if (!f.file)
		return -EBADFD;
	if (!is_pcm_file(f.file)) {
		res = -EBADFD;
		goto _badf;
	}
	pcm_file = f.file->private_data;
	substream1 = pcm_file->substream;
	group = kmalloc(sizeof(*group), GFP_KERNEL);
	if (!group) {
		res = -ENOMEM;
		goto _nolock;
	}
	down_write(&snd_pcm_link_rwsem);
	write_lock_irq(&snd_pcm_link_rwlock);
	if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
	    substream->runtime->status->state != substream1->runtime->status->state) {
		res = -EBADFD;
		goto _end;
	}
	if (snd_pcm_stream_linked(substream1)) {
		res = -EALREADY;
		goto _end;
	}
	if (!snd_pcm_stream_linked(substream)) {
		substream->group = group;
		group = NULL;
		spin_lock_init(&substream->group->lock);
		INIT_LIST_HEAD(&substream->group->substreams);
		list_add_tail(&substream->link_list, &substream->group->substreams);
		substream->group->count = 1;
	}
	list_add_tail(&substream1->link_list, &substream->group->substreams);
	substream->group->count++;
	substream1->group = substream->group;
 _end:
	write_unlock_irq(&snd_pcm_link_rwlock);
	up_write(&snd_pcm_link_rwsem);
 _nolock:
	snd_card_unref(substream1->pcm->card);
	kfree(group);
 _badf:
	fdput(f);
	return res;
}

static void relink_to_local(struct snd_pcm_substream *substream)
{
	substream->group = &substream->self_group;
	INIT_LIST_HEAD(&substream->self_group.substreams);
	list_add_tail(&substream->link_list, &substream->self_group.substreams);
}

static int snd_pcm_unlink(struct snd_pcm_substream *substream)
{
	struct snd_pcm_substream *s;
	int res = 0;

	down_write(&snd_pcm_link_rwsem);
	write_lock_irq(&snd_pcm_link_rwlock);
	if (!snd_pcm_stream_linked(substream)) {
		res = -EALREADY;
		goto _end;
	}
	list_del(&substream->link_list);
	substream->group->count--;
	if (substream->group->count == 1) {	/* detach the last stream, too */
		snd_pcm_group_for_each_entry(s, substream) {
			relink_to_local(s);
			break;
		}
		kfree(substream->group);
	}
	relink_to_local(substream);
       _end:
	write_unlock_irq(&snd_pcm_link_rwlock);
	up_write(&snd_pcm_link_rwsem);
	return res;
}

/*
 * hw configurator
 */
static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
			       struct snd_pcm_hw_rule *rule)
{
	struct snd_interval t;
	snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
		     hw_param_interval_c(params, rule->deps[1]), &t);
	return snd_interval_refine(hw_param_interval(params, rule->var), &t);
}

static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
			       struct snd_pcm_hw_rule *rule)
{
	struct snd_interval t;
	snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
		     hw_param_interval_c(params, rule->deps[1]), &t);
	return snd_interval_refine(hw_param_interval(params, rule->var), &t);
}

static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
				   struct snd_pcm_hw_rule *rule)
{
	struct snd_interval t;
	snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
			 hw_param_interval_c(params, rule->deps[1]),
			 (unsigned long) rule->private, &t);
	return snd_interval_refine(hw_param_interval(params, rule->var), &t);
}

static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
				   struct snd_pcm_hw_rule *rule)
{
	struct snd_interval t;
	snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
			 (unsigned long) rule->private,
			 hw_param_interval_c(params, rule->deps[1]), &t);
	return snd_interval_refine(hw_param_interval(params, rule->var), &t);
}

static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
				  struct snd_pcm_hw_rule *rule)
{
	unsigned int k;
	struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
	struct snd_mask m;
	struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
	snd_mask_any(&m);
	for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
		int bits;
		if (! snd_mask_test(mask, k))
			continue;
		bits = snd_pcm_format_physical_width(k);
		if (bits <= 0)
			continue; /* ignore invalid formats */
		if ((unsigned)bits < i->min || (unsigned)bits > i->max)
			snd_mask_reset(&m, k);
	}
	return snd_mask_refine(mask, &m);
}

static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
				       struct snd_pcm_hw_rule *rule)
{
	struct snd_interval t;
	unsigned int k;
	t.min = UINT_MAX;
	t.max = 0;
	t.openmin = 0;
	t.openmax = 0;
	for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
		int bits;
		if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
			continue;
		bits = snd_pcm_format_physical_width(k);
		if (bits <= 0)
			continue; /* ignore invalid formats */
		if (t.min > (unsigned)bits)
			t.min = bits;
		if (t.max < (unsigned)bits)
			t.max = bits;
	}
	t.integer = 1;
	return snd_interval_refine(hw_param_interval(params, rule->var), &t);
}