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Takashi Sakamoto 446216bd8e firewire: core: expose kernel API to schedule work item to process isochronous context 
In packet-per-buffer mode for isochronous context of 1394 OHCI, software
can schedule hardIRQ to the buffer in which the content of isochronous
packet is processed. The actual behaviour is different between isochronous
receive (IR) and transmit (IT) contexts in respect to isochronous cycle in
which the hardIRQ occurs.

In IR context, the hardIRQ occurs when the buffer is filled actually by
the content of received packet. If there are any isochronous cycles in
which the packet transmission is skipped, it is postponed to generate
the hardIRQ in respect to the isochronous cycle. In IT context, software
can schedule the content of packet every isochronous cycle including
skipping, therefore the hardIRQ occurs in the isochronous cycle to which
the software scheduled.

ALSA firewire stack uses the packet-per-buffer mode for both IR/IT
contexts. To process time stamp per packet (or per sample in some cases)
steadily for media clock recovery against unexpected transmission skips,
it uses an IT context to operate all of isochronous contexts by calls of
fw_iso_context_flush_completions() in the bottom-half of hardIRQ for the
IT context.

Although it looks well to handle all of isochronous contexts in a single
bottom-half context, it relatively takes longer time. In the future code
integration (not yet), it is possible to apply parallelism method to
process these context. In the case, it is useful to allow unit drivers to
schedule work items to process these isochronous contexts.

As a preparation, this commit exposes
fw_iso_context_schedule_flush_completions() as a kernel API available by
unit drivers. It is renamed from fw_iso_context_queue_work() since it is
a counter part of fw_iso_context_flush_completions().

Link: https://lore.kernel.org/r/20240908040549.75304-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
2024-09-08 13:05:48 +09:00
..
accel
accessibility
acpi RISC-V Patches for the 6.11 Merge Window, Part 2 2024-07-27 10:14:34 -07:00
amba
android
ata Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
atm
auxdisplay auxdisplay updates for v6.11 2024-07-26 11:04:28 -07:00
base regmap: Fix for v6.11 2024-07-27 12:26:09 -07:00
bcma
block block-6.11-20240726 2024-07-27 15:28:53 -07:00
bluetooth Bluetooth: btmtk: remove #ifdef around declarations 2024-07-26 10:56:54 -04:00
bus Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
cache cache: StarFive: Require a 64-bit system 2024-08-01 07:15:02 -07:00
cdrom sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
cdx
char sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
clk Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
clocksource of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
comedi
connector
counter Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
cpufreq Power management updates for 6.11-rc1 2024-07-16 15:54:03 -07:00
cpuidle
crypto ARM: 2024-07-20 12:41:03 -07:00
cxl CXL for v6.11 merge window 2024-07-28 09:33:28 -07:00
dax Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
dca Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
devfreq
dio
dma Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
dma-buf - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
dpll
edac minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
eisa
extcon
firewire firewire: core: expose kernel API to schedule work item to process isochronous context 2024-09-08 13:05:48 +09:00
firmware ARM updates for v6.11-rc1 2024-07-29 10:33:51 -07:00
fpga Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
fsi Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
gnss
gpio gpio fixes for v6.11-rc1 2024-07-27 12:54:06 -07:00
gpu drm fixes for 6.11-rc2 2024-08-02 08:59:09 -07:00
greybus Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
hid for-linus-2024072901 2024-07-29 13:07:05 -07:00
hsi Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
hte
hv Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
hwmon minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
hwspinlock
hwtracing Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
i2c Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
i3c I3C for 6.11 2024-07-27 10:53:06 -07:00
idle
iio of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
infiniband IOMMU Updates for Linux v6.11 2024-07-19 09:59:58 -07:00
input Input: MT - limit max slots 2024-07-29 10:44:48 -07:00
interconnect Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
iommu IOMMU Fixes for Linux v6.11-rc1 2024-07-27 12:39:55 -07:00
ipack
irqchip A couple of fixes for interrupt chip drivers: 2024-08-04 08:36:57 -07:00
isdn mISDN: Fix a use after free in hfcmulti_tx() 2024-07-25 08:05:05 -07:00
leds - Core Frameworks 2024-07-17 17:51:30 -07:00
macintosh sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-25 12:58:36 -07:00
mailbox mailbox: mtk-cmdq: Move devm_mbox_controller_register() after devm_pm_runtime_enable() 2024-07-19 21:25:23 -05:00
mcb Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
md minmax: add a few more MIN_T/MAX_T users 2024-07-28 13:41:14 -07:00
media media fixes for v6.11-rc2 2024-08-04 08:12:33 -07:00
memory
memstick Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
message
mfd Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
misc Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
mmc Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
most Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
mtd This pull request contains updates (actually, just fixes) for UBI and UBIFS: 2024-07-28 11:51:51 -07:00
mux
net Including fixes from wireless, bleutooth, BPF and netfilter. 2024-08-01 09:42:09 -07:00
nfc minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
ntb Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
nubus
nvdimm Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
nvme nvme fixes for Linux 6.11 2024-07-26 08:06:15 -06:00
nvmem Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
of IOMMU Updates for Linux v6.11 2024-07-19 09:59:58 -07:00
opp Merge branches 'pm-opp' and 'pm-tools' 2024-07-15 18:55:14 +02:00
parisc
parport sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-25 12:58:36 -07:00
pci PCI: pciehp: Retain Power Indicator bits for userspace indicators 2024-08-01 12:58:03 -05:00
pcmcia Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
peci Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
perf perf: riscv: Fix selecting counters in legacy mode 2024-08-01 07:15:13 -07:00
phy phy-for-6.11 2024-07-24 13:11:28 -07:00
pinctrl of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
platform chrome-platform fixes for v6.11-rc2 2024-07-30 12:53:52 -07:00
pmdomain
pnp
power power supply and reset changes for the 6.11 series 2024-07-23 09:38:27 -07:00
powercap
pps Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
ps3
ptp Networking changes for 6.11. Not much excitement - a handful of large 2024-07-16 19:28:34 -07:00
pwm of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
rapidio
ras - The AMD memory controllers data fabric version 4.5 supports 2024-07-15 18:20:24 -07:00
regulator regulator: Fixes for v6.11 2024-07-27 12:27:52 -07:00
remoteproc rpmsg updates for v6.11 2024-07-23 13:41:59 -07:00
reset Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
rpmsg Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
rtc
s390 s390/cio: Add missing MODULE_DESCRIPTION() macros 2024-07-31 16:30:20 +02:00
sbus
scsi SCSI fixes on 20240803 2024-08-03 15:12:56 -07:00
sh
siox Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
slimbus Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
soc Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
soundwire Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
spi spi: Fixes for v6.11 2024-07-27 12:29:10 -07:00
spmi Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
ssb
staging minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
target
tc
tee Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
thermal Merge branch 'thermal-intel' 2024-07-31 12:31:27 +02:00
thunderbolt Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
tty Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
ufs Merge branch '6.11/scsi-queue' into 6.11/scsi-fixes 2024-07-29 21:46:16 -04:00
uio
usb Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
vdpa virtio: fixes 2024-07-29 12:53:37 -07:00
vfio Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
vhost virtio: features, fixes, cleanups 2024-07-19 11:57:55 -07:00
video - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
virt ARM: 2024-07-20 12:41:03 -07:00
virtio virtio: fixes 2024-07-29 12:53:37 -07:00
w1
watchdog linux-watchdog 6.11-rc1 tag 2024-07-25 10:18:35 -07:00
xen Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
zorro Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
Kconfig
Makefile