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4092996774
o Axe poll in trap.
o Axe IFF_POLLING flag from if_flags.
o Rework revision 1.21 (Giant removal), in such a way that
poll_mtx is not dropped during call to polling handler.
This fixes problem with idle polling.
o Make registration and deregistration from polling in a
functional way, insted of next tick/interrupt.
o Obsolete kern.polling.enable. Polling is turned on/off
with ifconfig.
Detailed kern_poll.c changes:
- Remove polling handler flags, introduced in 1.21. The are not
needed now.
- Forget and do not check if_flags, if_capenable and if_drv_flags.
- Call all registered polling handlers unconditionally.
- Do not drop poll_mtx, when entering polling handlers.
- In ether_poll() NET_LOCK_GIANT prior to locking poll_mtx.
- In netisr_poll() axe the block, where polling code asks drivers
to unregister.
- In netisr_poll() and ether_poll() do polling always, if any
handlers are present.
- In ether_poll_[de]register() remove a lot of error hiding code. Assert
that arguments are correct, instead.
- In ether_poll_[de]register() use standard return values in case of
error or success.
- Introduce poll_switch() that is a sysctl handler for kern.polling.enable.
poll_switch() goes through interface list and enabled/disables polling.
A message that kern.polling.enable is deprecated is printed.
Detailed driver changes:
- On attach driver announces IFCAP_POLLING in if_capabilities, but
not in if_capenable.
- On detach driver calls ether_poll_deregister() if polling is enabled.
- In polling handler driver obtains its lock and checks IFF_DRV_RUNNING
flag. If there is no, then unlocks and returns.
- In ioctl handler driver checks for IFCAP_POLLING flag requested to
be set or cleared. Driver first calls ether_poll_[de]register(), then
obtains driver lock and [dis/en]ables interrupts.
- In interrupt handler driver checks IFCAP_POLLING flag in if_capenable.
If present, then returns.This is important to protect from spurious
interrupts.
Reviewed by: ru, sam, jhb
153 lines
4.4 KiB
Plaintext
153 lines
4.4 KiB
Plaintext
$FreeBSD$
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IEEE 1394 support for FreeBSD-5.X and 4.X.
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1. Introduction
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This tarball contains IEEE1394(FireWire) driver which is first
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written by Katsushi Kobayashi[1] <ikob@koganei.wide.ad.jp> and
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modified by Hidetoshi Shimokawa <simokawa@freebsd.org>.
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Please note this driver is still under development.
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You can find latest snapshots under:
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http://people.freebsd.org/~simokawa/
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named firewire-2002XXXX.tar.gz
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The driver consists of 6 parts:
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- fwohci.c/fwohci_pci.c
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OHCI[2] driver
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- IEEE1394 link/phy chip control
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- firewire.c
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Chip independent driver
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- CSR
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- Transaction
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- Character devices for userland
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- fwmem.c
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/dev/fwmem0: physical memory of a remote node.
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- sbp.c
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SBP-II[3] (a.k.a. SCSI over FireWire) driver
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- if_fwe.c
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NON-Standard implementation of Ethernet over FireWire.
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- bus_mgm.c (userland)
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Bus management function for user.
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show topology map, change gap count, bus reset, etc.
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2. Installation
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Suppose you have kernel source at /sys.
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- Extract tarball at root directory.
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- cd /sys/dev/firewire
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- make
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- make install
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- make load
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For FreeBSD-4 user:
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- ./MAKEDEV
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3. SBP-II support (sbp)
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- You need CAM(SCSI) support in your kernel.
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If you are using FreeBSD-5 before 2002/03/23 or FreeBSD-4 before
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2002/4/8, you need to apply CAM-patch in this archive
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to handle HDD's(T_RBC or T_DIRECT which doesn't support READ_6).
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- If you connect a few firewire devices only, try the following to
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reduce gap overhead.
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- ./bus_mgm -g 8
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4. Ethernet over FireWire (if_fwe)
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This is a sample driver for ethernet emulation. Please note this
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does NOT conform to any standards like IP over FireWire(RFC2734[4]).
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It just sends ethernet frames encapsulated in asynchronous stream
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packets. It doesn't scale because it does something like unicast over multicast, but it's easy to be implemented and you can use any
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facilities what ethernet can do. (ipv6, bridging, vlan etc.)
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It also has DEVICE_POLLING[5] support. To enable it, edit your
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kernel config file and Makefile.fwe then rebuild kernel and if_fwe.ko.
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5. FireWire for Kernel Hackers
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As you know, IEEE1394 is a bus and OHCI supports physical access
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to the host memory. This means that you can access the remote
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host over firewire without software support at the remote host.
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In other words, you can investigate remote host's physical memory
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whether its OS is alive or crashed or hangs up.
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You need to apply KVMLIB-patch and rebuild libkvm then rebuild ps,
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dmesg and gdb those are statically linked.
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You may want to apply GDB-patch in this archive to get same behavior
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as gdb with /dev/mem or want to insert savectx(&dumppcb) into panic(),
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breakpoint() and so on to emulation crash dump.
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You have to determine target node_id manually at this point.
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(guess using bus_mgm -t or dmesg)
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(Targets should be specified by EUI64 in the future)
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# sysctl kern.firewire.fwmem_node=[node_id]
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# ps -agx -M /dev/fwmem0 -N /sys/i386/compile/GENERIC/kernel
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# dmesg -M /dev/fwmem0 -N /sys/i386/compile/GENERIC/kernel
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# gdb -k -c /dev/fwmem0 /sys/i386/compile/GENERIC/kernel.debug
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# dd if=/dev/fwmem0 of=vmcore bs=1m count=[phys. memory in MB]
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remote gdb at 400,000,000 bps :-)
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6. DV
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I have not tested yet.
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7. Tested HW
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OS
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- FreeBSD-4/i386
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- FreeBSD-4/alpha
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- FreeBSD-5/i386
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* Not tested on SMP.
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* Not tested on big-endian machine...
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OHCI
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- Texas Instruments TSB12LV26 (PCI)
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- Texas Instruments TSB43AA22 (PCI/Cardbus)
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* There might be phy probing problem but most of the OHCI
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chips should work.
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* Tested with multiple firewire buses.
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SBP-II
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- HDD: Logitec USB/FireWire LHD-P30FU
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- HDD: Yano A-dish 120GB
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- HDD: Yano B-Max 320GB
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The repository of cvsup2.jp.freebsd.org is on this device.
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- HDD: Personal Storage 3000XT 160GB
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The last sector of this drive cannot be accessed..
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- DVD-RAM: Panasonic LF-D340JD
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- SCSI-FireWire converter: Yano FWSCSI-01
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We can recognize only 1 device/lun at this point
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- HDD: iPod, PowerBook G4 (target mode)
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Reported by ikob
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- Scanner: Epson GT-9700F
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Now works!!
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Sane-backend needs a patch(SANE-patch in this archive).
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if_fwe
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- IPv4, IPv6, bridging, vlan.
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- You need at least two FreeBSD machines with this driver to use.
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References:
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[1] ftp://ftp.uec.ac.jp/pub/firewire/beta/
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[2] http://developer.intel.com/technology/1394/download/ohci_11.htm
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[3] http://www.t10.org/scsi-3.htm
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[4] http://www.faqs.org/rfcs/rfc2734.html
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[5] http://info.iet.unipi.it/~luigi/polling/
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Hidetoshi Shimokawa
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simokawa@freebsd.org
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