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Add NETISR_FLAG_NOTMPSAFE, which could be used as the last parameter to netisr_register(), more expressive and less error-prone than 0. Suggested-by: hsu@
Add following three network protocol threads running mode: 1) BGL (default) 2) Adaptive BGL. Protocol threads run without BGL by default. BGL will be held if the received msg does not have MSGF_MPSAFE turned on the ms_flags field 3) No BGL (experimental) The code on the main path is done by dillon@ Following three sysctls and tunables are added to adjust the "mode": net.netisr.mpsafe_thread net.inet.tcp.mpsafe_thread net.inet.udp.mpsafe_thread They have same set of values, 0 (default) -- BGL 1 -- Adaptive BGL 2 -- No BGL NETISR_FLAG_MPSAFE is added (netisr.ni_flags), so that: - netisr_queue() and schednetisr() could set MSGF_MPSAFE during msg initialization - netisr_run() (called by ether_input_oncpu()) could hold BGL based on this flag before calling netisr's handler PR_MPSAFE is added (protosw.pr_flags), so that tranport_processing_oncpu() could hold BGL before calling protocol's input handler Kernel API changes: - The thread parameter to netmsg_service_loop() must be supplied (running mode) and it must have the type of "int *" - netisr_register() takes additional flags parameter to indicate whether its handler is MPSAFE (NETISR_FLAG_MPSAFE) or not Reviewed-by: dillon@
Nuke device_ptr_t, USBBASEDEVICE, USBDEVNAME(), USBDEVUNIT(), USBGETSOFTC(), USBDEVPTRNAME() and Static with help from sed(1).
* Greatly reduce the complexity of the LWKT messaging and port abstraction. Significantly reduce the overhead of the subsystem. * The message abort algorithm has been rewritten. It now sends a separate message to issue the abort instead of trying to requeue the original message. This also means the TAILQ embedded in the lwkt_msg structure can be used by unrelated code during processing of the message. * Numerous MSGF_ flags have been removed, and all the LWKT msg/port algorithms have been rewritten and simplified. The message structure is now only touched by the current owner in all situations. * Numerous structural fields have been removed. In particular, the fields used for message abort sequencing have been simplified and we do not try to embed a 'command' field in the base LWKT message any more. * Clean up the netmsg abstraction, which is used all over the network stack. Instead of trying to overload fields in lwkt_msg we now simply extend the base lwkt_msg into struct netmsg. The function dispatch now takes a netmsg and returns void (before we had to return EASYNC), and we no longer need weird casts. Accept/connect message aborts are now greatly simplified.
Sync USB support (host controller part) with FreeBSD6. Following changes on FreeBSD-CURRENT(by firstname.lastname@example.org) are merged: ehci.c rev 1.52 ohci.c rev 1.167 uhci.c rev 1.172 usb.c rev 1.111 usbdi.h rev 1.61 "Use a different task queue for host controller and peripheral driver tasks. Since the host controllers rely on tasks to process transfer timeouts, if a synchronous transfer from a driver was invoked from a task and timed out, it would never complete because the single task thread was stuck performing the synchronous transfer so couldn't process the timeout." As of this commit, only following kernel APIs are changed: - usbd_get_string_desc() takes one more argument which returns the actual size of the string description. - usb_add_task() takes one more argument. The extra arguemnt is used to specify to which task queue the task should be added. There is two task queues defined, one for peripheral driver (USB_TASKQ_DRIVER), one for host controller (USB_TASKQ_HC). ugen(4) is adapted according to the above kernel API changes. Thank all of the folks for their work on the USB support. Tested-by: swildner@, vbd@, joerg@(1.6 backport), Max Herrgard <email@example.com> # Though VT6202 is supported by ehci(4), I still have problems with this # chip, even with the updated ehci(4).
Embed the netmsg in the mbuf itself rather than allocating one for each received packet. This greatly reduces the overhead in the network receive path (removing a malloc() and free()).
* Move function types to a separate line. * Ansify function definitions. * Remove (void) casts for discarded return values. In collaboration with: Alexey Slynko <firstname.lastname@example.org>
Make all network interrupt service routines MPSAFE part 1/3. Replace the critical section that was previously used to serialize access with the LWKT serializer. Integrate the serializer into the IFNET structure. Note that kern.intr_mpsafe must be set to 1 for network interrupts to actually run MPSAFE. Also note that any interrupts shared with othre non-MP drivers will cause all drivers on that interrupt to run with the Big Giant Lock. Network interrupt - Each network driver then simply passes that serializer to bus_setup_intr() so only a single serializer is required to process the entire interrupt path. LWKT serialization support is already 100% integrated into the interrupt subsystem so it will already be held as of when the registered interrupt procedure is called. Ioctl and if_* functions - All callers of if_* functions (such as if_start, if_ioctl, etc) now obtain the IFNET serializer before making the call. Thus all of these entry points into the driver will now be serialized. if_input - All code that calls if_input now ensures that the serializer is held. It will either already be held (when called from a driver), or the serializer will be wrapped around the call. When packets are forwarded or bridged between interfaces, the target interface serializer will be dropped temporarily to avoid a deadlock. Device Driver access - dev_* entry points into certain pseudo-network devices now obtain and release the serializer. This had to be done on a device-by-device basis (but there are only a few such devices). Thanks to several people for helping test the patch, in particular Sepherosa Ziehau.
Remove spl*() calls from the bus/ infrastructure, replacing them with critical sections. Remove splusb() from everywhere, replacing it with critical sections.
The old USB ethernet code utilized a netisr to hand packets over the ether_input and cleanup after txeof. This was broken some time ago and is a workaround for the different IPL of USB and the network stack. Reduce the amount of hacks by removing usb_tx_done, it can be done mostly in-place with a slight race-condition in the enqueue code. usb_ether_input now directly calls ether_input, the caller is responsible for rearming the receiver. That's doesn't open a race since the receiver doesn't have to handle the interface queues, for the driver state is the driver responsible. The IPL protection of the USB ethernet drivers has to be reviewed, it's mostly not existing.
Use ifq_is_empty to allow USB drivers to support ALTQ.
Unify the input handling of the low-level network stack by introducing a new field if_input in struct ifnet. Initialize if_input and if_output in the low-level _ifattach routines. Make the _output and _input routines static, they are now called via (*ifp->if_input) and (*ifp->if_output) accordingly. The exception is ether_input which is still used with the second argument, the pointer to the Ethernet header instead of always taking it from the mbuf. Move the if_attach and bpfattach from the devices into fddi_ifattach, atm_ifattach. Remove the first argument to VLAN_INPUT_TAG, the pointer to the Ethernet header. Expect it at the beginning of the mbuf. Adjust the network for the changed API. Exceptions are wl(4), le(4), ie(4), el(4), ed(4) and de(4), because they use a on-stack Ethernet header. Another exception is the ATM stack, which uses a fourth argument to atm_input. Inspired-by: NetBSd net/if.h, rev 1.36
Fix a netmsg memory leak in the ARP code. Adjust all ms_cmd function dispatches to return a proper error code. Reported-by: multiple people
Push the lwkt_replymsg() up one level from netisr_service_loop() to the message handler so we can explicitly reply or not reply as appropriate.
Dispatch upper-half protocol request handling.
Bring in the entire FreeBSD-5 USB infrastructure. As of this commit my USB camera, Hard Drive, Mouse, and Sony memory key all work and I can even unplug and replug them in without crashing the port. Not all drivers and subsystems compile as of this commit, but the ones that do not are very close.
Network threading stage 1/3: netisrs are already software interrupts, which means they alraedy run in their own thread. This commit creates multiple supporting threads for netisrs rather then just one and code has been added to begin routing packets to particular threads based on their content. Eventually this will lead to us being able to isolate and serialize PCBs in particular threads. The tail end of the ip_input path's protocol dispatch, the UIPC (user entry) code, and listen socket have not been covered yet and still need to be serialized. A new debugging sysctl, net.inet.ip.mthread_enable, has been added. It defaults to 1. If you set this sysctl 0 netisr processing will revert to the prior single-threaded behavior. Submitted-by: Jeffrey Hsu <hsu@FreeBSD.org> Additional-work-by: dillon
Centralize if queue handling. Original patch against FreeBSD submitted by Jonathan Lemon. Reviewed by Matt Dillon.
kernel tree reorganization stage 1: Major cvs repository work (not logged as commits) plus a major reworking of the #include's to accomodate the relocations. * CVS repository files manually moved. Old directories left intact and empty (temporary). * Reorganize all filesystems into vfs/, most devices into dev/, sub-divide devices by function. * Begin to move device-specific architecture files to the device subdirs rather then throwing them all into, e.g. i386/include * Reorganize files related to system busses, placing the related code in a new bus/ directory. Also move cam to bus/cam though this may not have been the best idea in retrospect. * Reorganize emulation code and place it in a new emulation/ directory. * Remove the -I- compiler option in order to allow #include file localization, rename all config generated X.h files to use_X.h to clean up the conflicts. * Remove /usr/src/include (or /usr/include) dependancies during the kernel build, beyond what is normally needed to compile helper programs. * Make config create 'machine' softlinks for architecture specific directories outside of the standard <arch>/include. * Bump the config rev. WARNING! after this commit /usr/include and /usr/src/sys/compile/* should be regenerated from scratch.
Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most ids have been removed from !lint sections and moved into comment sections.
import from FreeBSD RELENG_4 220.127.116.11