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A maintainer of Linux FireWire subsystem and ALSA firewire stack.
http://ieee1394.docs.kernel.org/
https://github.com/takaswie/linux-firewire-dkms/

Takashi Sakamoto (坂本 貴史)

Edited 30 minutes ago
Posted: [GIT PULL] firewire updates for v6.11
https://lore.kernel.org/linux-kernel/20240720084730.GA59546@workstation.local/T/#u

There are many line changes for FireWire subsystem, while there is no
functional change for practical use. The most of changes are for code
refactoring, some KUnit tests to added helper functions, and new
tracepoints events for both the core functions and 1394 OHCI driver.

The tracepoints events now cover the verbose logging enabled by debug
parameter of firewire-ohci kernel module. The parameter would be removed
in any future timing, thus it is now deprecated.
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Takashi Sakamoto (坂本 貴史)

Hm. I'm investigating to replace the local implementation to maintain blocks in the allocated memory region mapped for DMA purpose with common dma_pool. However, it does not allows to pick up an arbitrary count of blocks at once for continuous memory region. It just connect returned block to the tail of local list, and has no mechanism to keep maintained blocks as continuous.
Typically, this kind of framework requires mechanism to suppress fragmentation, but it has nothing. I prefer its simplicity, but a bit inconvenient for my purpose...
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Takashi Sakamoto (坂本 貴史)

Being straightforward is not necessarily more adequate than being simple.
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Takashi Sakamoto (坂本 貴史)

As I said.
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Asahi Lina (朝日リナ) // Cyan Nyan's manager maybe ✨

Figuring out how to represent this device's mixer controls in ALSA is pain peko...

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Takashi Sakamoto (坂本 貴史)

Ah, indeed. PCI device driver has no need to know virtual address mapped to their DMA bus address, unless they have any interface to applications.
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Takashi Sakamoto (坂本 貴史)

In a design of the core function, the device underlying the card is not necessarily 1394 OHCI, thus the identifier should not be selected from PCIe-related data. Hm.
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Several websites write that snapdragon X devices are the first laptop with Arm cpu.

Acorn A4 was the first laptop with ARM cpu.

In June 1992. 32 years ago.

https://www.computinghistory.org.uk/det/22807/Acorn-A4-Laptop/

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Takashi Sakamoto (坂本 貴史)

Alternatively, `card_index` or device major/minor numbers? An address in PCI bus?
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Takashi Sakamoto (坂本 貴史)

Edited 1 month ago
Mmm. `__assign_str()` for` dev_name()` with `struct device *`. I don't like to put strings into data structure for tracepoints events...
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Takashi Sakamoto (坂本 貴史)

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Takashi Sakamoto (坂本 貴史)

Edited 2 months ago
OHCI_TCODE_PHY_PACKET = TCODE_LINK_INTERNAL = OHCI1394_phy_tcode = 0xe in 1394 OHCI.
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Takashi Sakamoto (坂本 貴史)

Edited 3 months ago

Hm. A commit 29a43dc130ce (“PCI: Mark LSI FW643 to avoid bus reset”) should be reverted, since it would include some misunderstandings.

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Takashi Sakamoto (坂本 貴史)

Debian Bug report logs - #1061936 ITP: libhitaki -- Library to operate ALSA HwDep device for ALSA firewire stack
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1061936

Was closed!
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Takashi Sakamoto (坂本 貴史)

Edited 6 months ago
[PATCH] firewire: ohci: suppress unexpected system reboot in AMD Ryzen machines and ASM108x/VT630x PCIe cards
https://lore.kernel.org/lkml/20231229035735.11127-1-o-takashi@sakamocchi.jp/
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Takashi Sakamoto (坂本 貴史)

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Takashi Sakamoto (坂本 貴史)

The debian package for linux-firewire-utils 0.5.0-1 is now accepted to unstable.

https://tracker.debian.org/pkg/linux-firewire-utils
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Takashi Sakamoto (坂本 貴史)

Libhinoko version 0.9.1 release

The main objective of this micro release is to incorporate support for
meson build subproject functionality. For applications to utilize meson
build wrap dependency system, a new dependency object of 'hinoko' is newly
available. For detailed information, please refer to README.tst.
Inconveniently, hinoko project is not registered to public WrapDB yet,
thus users need to write wrap file manually for the time being.

For the release, compressed package archive is available with both
signatures by kernel.org system admin and author under this URL:

https://kernel.org/pub/linux/libs/ieee1394/libhinoko-0.9.1.tar.xz

The package archive is generated by 0.9.1 signed tag in upstream
repository:

https://git.kernel.org/pub/scm/libs/ieee1394/libhinoko.git/tag/?h=v0.9.1
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