aboutsummaryrefslogtreecommitdiff
AgeCommit message (Collapse)Author
2008-04-18ocfs2/dlm: Rename slabcache dlm_mle_cache to o2dlm_mleSunil Mushran
This patch renames dlm_mle_slabcache to prevent namespace clashes with fs/dlm. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Document /sys/fs/ocfs2Joel Becker
Add ABI documentation for these files: /sys/fs/ocfs2/max_locking_protocol /sys/fs/ocfs2/loaded_cluster_plugins /sys/fs/ocfs2/active_cluster_plugin /sys/fs/ocfs2/cluster_stack Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Allow selection of cluster plug-ins.Joel Becker
ocfs2 now supports plug-ins for the classic O2CB stack as well as userspace cluster stacks in conjunction with fs/dlm. This allows zero, one, or both of the plug-ins to be selected in Kconfig. For local mounts (non-clustered), neither plug-in is needed. Both plugins can be loaded at one time, the runtime will select the one needed for the cluster systme in use. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Add kbuild for ocfs2_stack_user.koJoel Becker
Add ocfs2_stack_user.ko to the Makefile so that it builds. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Change mlog_bug_on to BUG_ON in ocfs2_lockid.hJoel Becker
The masklog code is in the o2cb stack, but ocfs2_lockid.h now needs to be included by the user stack. The BUG() in ocfs2_lock_type_string() does not need masklog support, so change it to a regular BUG_ON(). Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: add fsdlm to stackglueDavid Teigland
Add code to use fs/dlm. [ Modified to be part of the stack_user module -- Joel ] Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Add the 'set version' message to the ocfs2_control device.Joel Becker
The "SETV" message sets the filesystem locking protocol version as negotiated by the client. The client negotiates based on the maximum version advertised in /sys/fs/ocfs2/max_locking_protocol. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Add the local node id to the handshake.Joel Becker
This is the second part of the ocfs2_control handshake. After negotiating the ocfs2_control protocol, the daemon tells the filesystem what the local node id is via the SETN message. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Introduce the DOWN message to ocfs2_controlJoel Becker
When the control daemon sees a node go down, it sends a DOWN message through the ocfs2_control device. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Start the ocfs2_control handshake.Joel Becker
When a control daemon opens the ocfs2_control device, it must perform a handshake to tell the filesystem it is something capable of monitoring cluster status. Only after the handshake is complete will the filesystem allow mounts. This is the first part of the handshake. The daemon reads all supported ocfs2_control protocols, then writes in the protocol it will use. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Add the ocfs2_control misc device.Joel Becker
The ocfs2_control misc device is how a userspace control daemon (controld) talks to the filesystem. Introduce the bare-bones filesystem ops. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Add the user stack module.Joel Becker
Add a skeleton for the stack_user module. It's just the barebones module code. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Add the 'cluster_stack' sysfs file.Joel Becker
Userspace can now query and specify the cluster stack in use via the /sys/fs/ocfs2/cluster_stack file. By default, it is 'o2cb', which is the classic stack. Thus, old tools that do not know how to modify this file will work just fine. The stack cannot be modified if there is a live filesystem. ocfs2_cluster_connect() now takes the expected cluster stack as an argument. This way, the filesystem and the stack glue ensure they are speaking to the same backend. If the stack is 'o2cb', the o2cb stack plugin is used. For any other value, the fsdlm stack plugin is selected. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Add the USERSPACE_STACK incompat bit.Joel Becker
The filesystem gains the USERSPACE_STACK incomat bit and the s_cluster_info field on the superblock. When a userspace stack is in use, the name of the stack is stored on-disk for mount-time verification. The "cluster_stack" option is added to mount(2) processing. The mount process needs to pass the matching stack name. If the passed name and the on-disk name do not match, the mount is failed. When using the classic o2cb stack, the incompat bit is *not* set and no mount option is used other than the usual heartbeat=local. Thus, the filesystem is compatible with older tools. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Create stack glue sysfs files.Joel Becker
Introduce a set of sysfs files that describe the current stack glue state. The files live under /sys/fs/ocfs2. The locking_protocol file displays the version of ocfs2's locking code. The loaded_cluster_plugins file displays all of the currently loaded stack plugins. When filesystems are mounted, the active_cluster_plugin file will display the plugin in use. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Break out stackglue into modules.Joel Becker
We define the ocfs2_stack_plugin structure to represent a stack driver. The o2cb stack code is split into stack_o2cb.c. This becomes the ocfs2_stack_o2cb.ko module. The stackglue generic functions are similarly split into the ocfs2_stackglue.ko module. This module now provides an interface to register drivers. The ocfs2_stack_o2cb driver registers itself. As part of this interface, ocfs2_stackglue can load drivers on demand. This is accomplished in ocfs2_cluster_connect(). ocfs2_cluster_disconnect() is now notified when a _hangup() is pending. If a hangup is pending, it will not release the driver module and will let _hangup() do that. Signed-off-by: Joel Becker <joel.becker@oracle.com>
2008-04-18ocfs2: Create ocfs2_stack_operations and split out the o2cb stack.Joel Becker
Define the ocfs2_stack_operations structure. Build o2cb_stack_ops from all of the o2cb-specific stack functions. Change the generic stack glue functions to call the stack_ops instead of the o2cb functions directly. The o2cb functions are moved to stack_o2cb.c. The headers are cleaned up to where only needed headers are included. In this code, stackglue.c and stack_o2cb.c refer to some shared extern variables. When they become modules, that will change. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Split o2cb code from generic stack functions.Joel Becker
Split off the o2cb-specific funtionality from the generic stack glue calls. This is a precurser to wrapping the o2cb functionality in an operations vector. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Clean up stackglue initializationJoel Becker
The stack glue initialization function needs a better name so that it can be used cleanly when stackglue becomes a module. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Abstract out a debugging function for underlying dlms.Joel Becker
dlmglue.c was still referencing a raw o2dlm lksb in one instance. Let's create a generic ocfs2_dlm_dump_lksb() function. This allows underlying DLMs to print whatever they want about their lock. We then move the o2dlm dump into stackglue.c where it belongs. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: handle async EAGAIN from NOQUEUE requestDavid Teigland
When using fsdlm, -EAGAIN is returned in the async callback for NOQUEUE requests. Fix up dlmglue to expect this. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Remove CANCELGRANT from the view of dlmglue.Joel Becker
o2dlm has the non-standard behavior of providing a cancel callback (unlock_ast) even when the cancel has failed (the locking operation succeeded without canceling). This is called CANCELGRANT after the status code sent to the callback. fs/dlm does not provide this callback, so dlmglue must be changed to live without it. o2dlm_unlock_ast_wrapper() in stackglue now ignores CANCELGRANT calls. Because dlmglue no longer sees CANCELGRANT, ocfs2_unlock_ast() no longer needs to check for it. ocfs2_locking_ast() must catch that a cancel was tried and clear the cancel state. Making these changes opens up a locking race. dlmglue uses the the OCFS2_LOCK_BUSY flag to ensure only one thread is calling the dlm at any one time. But dlmglue must unlock the lockres before calling into the dlm. In the small window of time between unlocking the lockres and calling the dlm, the downconvert thread can try to cancel the lock. The downconvert thread is checking the OCFS2_LOCK_BUSY flag - it doesn't know that ocfs2_dlm_lock() has not yet been called. Because ocfs2_dlm_lock() has not yet been called, the cancel operation will just be a no-op. There's nothing to cancel. With CANCELGRANT, dlmglue uses the CANCELGRANT callback to clear up the cancel state. When it comes around again, it will retry the cancel. Eventually, the first thread will have called into ocfs2_dlm_lock(), and either the lock or the cancel will succeed. The downconvert thread can then do its downconvert. Without CANCELGRANT, there is nothing to clean up the cancellation state. The downconvert thread does not know to retry its operations. More importantly, the original lock may be blocking on the other node that is trying to cancel us. With neither able to make progress, the ast is never called and the cancellation state is never cleaned up that way. dlmglue is deadlocked. The OCFS2_LOCK_PENDING flag is introduced to remedy this window. It is set at the same time OCFS2_LOCK_BUSY is. Thus, the downconvert thread can check whether the lock is cancelable. If not, it just loops around to try again. Once ocfs2_dlm_lock() is called, the thread then clears OCFS2_LOCK_PENDING and wakes the downconvert thread. Now, if the downconvert thread finds the lock BUSY, it can safely try to cancel it. Whether the cancel works or not, the state will be properly set and the lock processing can continue. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Fill node number during cluster stack initMark Fasheh
It doesn't make sense to query for a node number before connecting to the cluster stack. This should be safe to do because node_num is only just printed, and we're actually only moving the setting of node num a small amount further in the mount process. [ Disconnect when node query fails -- Joel ] Reviewed-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Move o2hb functionality into the stack glue.Joel Becker
The last bit of classic stack used directly in ocfs2 code is o2hb. Specifically, the check for heartbeat during mount and the call to ocfs2_hb_ctl during unmount. We create an extra API, ocfs2_cluster_hangup(), to encapsulate the call to ocfs2_hb_ctl. Other stacks will just leave hangup() empty. The check for heartbeat is moved into ocfs2_cluster_connect(). It will be matched by a similar check for other stacks. With this change, only stackglue.c includes cluster/ headers. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Abstract out node number queries.Joel Becker
ocfs2 asks the cluster stack for the local node's node number for two reasons; to fill the slot map and to print it. While the slot map isn't necessary for userspace cluster stacks, the printing is very nice for debugging. Thus we add ocfs2_cluster_this_node() as a generic API to get this value. It is anticipated that the slot map will not be used under a userspace cluster stack, so validity checks of the node num only need to exist in the slot map code. Otherwise, it just gets used and printed as an opaque value. [ Fixed up some "int" versus "unsigned int" issues and made osb->node_num truly opaque. --Mark ] Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Introduce the new ocfs2_cluster_connect/disconnect() API.Joel Becker
This step introduces a cluster stack agnostic API for initializing and exiting. fs/ocfs2/dlmglue.c no longer uses o2cb/o2dlm knowledge to connect to the stack. It is all handled in stackglue.c. heartbeat.c no longer needs to know how it gets called. ocfs2_do_node_down() is now a clean recovery trigger. The big gotcha is the ordering of initializations and de-initializations done underneath ocfs2_cluster_connect(). ocfs2_dlm_init() used to do all o2dlm initialization in one block. Thus, the o2dlm functionality of ocfs2_cluster_connect() is very straightforward. ocfs2_dlm_shutdown(), however, did a few things between de-registration of the eviction callback and actually shutting down the domain. Now de-registration and shutdown of the domain are wrapped within the single ocfs2_cluster_disconnect() call. I've checked the code paths to make sure we can safely tear down things in ocfs2_dlm_shutdown() before calling ocfs2_cluster_disconnect(). The filesystem has already set itself to ignore the callback. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Create the lock status block union.Joel Becker
Wrap the lock status block (lksb) in a union. Later we will add a union element for the fs/dlm lksb. Create accessors for the status and lvb fields. Other than a debugging function, dlmglue.c does not directly reference the o2dlm locking path anymore. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Use -errno instead of dlm_status for ocfs2_dlm_lock/unlock() API.Joel Becker
Change the ocfs2_dlm_lock/unlock() functions to return -errno values. This is the first step towards elminiating dlm_status in fs/ocfs2/dlmglue.c. The change also passes -errno values to ->unlock_ast(). [ Fix a return code in dlmglue.c and change the error translation table into an array of ints. --Mark ] Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Use global DLM_ constants in generic code.Joel Becker
The ocfs2 generic code should use the values in <linux/dlmconstants.h>. stackglue.c will convert them to o2dlm values. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Separate out dlm lock functions.Joel Becker
This is the first in a series of patches to isolate ocfs2 from the underlying cluster stack. Here we wrap the dlm locking functions with ocfs2-specific calls. Because ocfs2 always uses the same dlm lock status callbacks, we can eliminate the callbacks from the filesystem visible functions. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: New slot map formatJoel Becker
The old slot map had a few limitations: - It was limited to one block, so the maximum slot count was 255. - Each slot was signed 16bits, limiting node numbers to INT16_MAX. - An empty slot was marked by the magic 0xFFFF (-1). The new slot map format provides 32bit node numbers (UINT32_MAX), a separate space to mark a slot in use, and extra room to grow. The slot map is now bounded by i_size, not a block. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Define the contents of the slot_map file.Joel Becker
The slot map file is merely an array of __le16. Wrap it in a structure for cleaner reference. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: De-magic the in-memory slot map.Joel Becker
The in-memory slot map uses the same magic as the on-disk one. There is a special value to mark a slot as invalid. It relies on the size of certain types and so on. Write a new in-memory map that keeps validity as a separate field. Outside of the I/O functions, OCFS2_INVALID_SLOT now means what it is supposed to. It also is no longer tied to the type size. This also means that only the I/O functions refer to 16bit quantities. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: slot_map I/O based on max_slots.Joel Becker
The slot map code assumed a slot_map file has one block allocated. This changes the code to I/O as many blocks as will cover max_slots. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Change the recovery map to an array of node numbers.Joel Becker
The old recovery map was a bitmap of node numbers. This was sufficient for the maximum node number of 254. Going forward, we want node numbers to be UINT32. Thus, we need a new recovery map. Note that we can't keep track of slots here. We must write down the node number to recovery *before* we get the locks needed to convert a node number into a slot number. The recovery map is now an array of unsigned ints, max_slots in size. It moves to journal.c with the rest of recovery. Because it needs to be initialized, we move all of recovery initialization into a new function, ocfs2_recovery_init(). This actually cleans up ocfs2_initialize_super() a little as well. Following on, recovery cleaup becomes part of ocfs2_recovery_exit(). A number of node map functions are rendered obsolete and are removed. Finally, waiting on recovery is wrapped in a function rather than naked checks on the recovery_event. This is a cleanup from Mark. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Make ocfs2_slot_info private.Joel Becker
Just use osb_lock around the ocfs2_slot_info data. This allows us to take the ocfs2_slot_info structure private in slot_info.c. All access is now via accessors. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18ocfs2: Move slot map access into slot_map.cMark Fasheh
journal.c and dlmglue.c would refresh the slot map by hand. Instead, have the update and clear functions do the work inside slot_map.c. The eventual result is to make ocfs2_slot_info defined privately in slot_map.c Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2008-04-18firewire: cleanupsAdrian Bunk
This patch contains the following cleanups: - #if 0 the following unused structs: - fw-transaction.c:fw_low_memory_region - fw-transaction.c:fw_private_region - fw-transaction.c:fw_csr_region - fw-transaction.c:fw_unit_space_region - remove the following unused EXPORT_SYMBOL's: - fw-card.c:fw_core_add_descriptor - fw-card.c:fw_core_remove_descriptor - fw-iso.c:fw_iso_context_create - fw-iso.c:fw_iso_context_destroy - fw-iso.c:fw_iso_context_start - fw-iso.c:fw_iso_context_queue - fw-iso.c:fw_iso_context_stop Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-04-18firewire: fix synchronization of gap countsStefan Richter
Fix: The fact that nodes had different gap counts would be overlooked if the bus manager code would pick gap count 63 because of beta repeaters or because of very large hop counts. In this case, the bus manager code would miss that it actually has to send the PHY config packet with gap count 63. Related trivial changes: Use bool for an int used as bool, touch up some comments. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-04-18firewire: wait until PHY configuration packet was transmitted (fix bus reset ↵Stefan Richter
loop) We now exit fw_send_phy_config /after/ the PHY config packet has been transmitted, instead of before. A subsequent fw_core_initiate_bus_reset will therefore not overlap with the transmission. This is meant to make the send PHY config packet + reset bus routine more deterministic. Fixes bus reset loop and eventual panic with - VIA VT6307 + IOGEAR hub + Unibrain Fire-i camera http://bugzilla.kernel.org/show_bug.cgi?id=10128 - JMicron card Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
2008-04-18firewire: remove unused struct memberStefan Richter
request_generation is internal to fw-ohci and unneeded in fw_card. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-04-18firewire: use bitwise and to get reg in handle_registersJarod Wilson
for code efficiency. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-04-18firewire: replace more hex values with defined csr constantsJarod Wilson
Trivial change to replace more meaningless (to the untrained eye) hex values with defined CSR constants. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-04-18firewire: reread config ROM when device reset the busStefan Richter
When a device changes its configuration ROM, it announces this with a bus reset. firewire-core has to check which node initiated a bus reset and whether any unit directories went away or were added on this node. Tested with an IOI FWB-IDE01AB which has its link-on bit set if bus power is available but does not respond to ROM read requests if self power is off. This implements - recognition of the units if self power is switched on after fw-core gave up the initial attempt to read the config ROM, - shutdown of the units when self power is switched off. Also tested with a second PC running Linux/ieee1394. When the eth1394 driver is inserted and removed on that node, fw-core now notices the addition and removal of the IPv4 unit on the ieee1394 node. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-04-18firewire: replace static ROM cache by allocated cacheStefan Richter
read_bus_info_block() is repeatedly called by workqueue jobs. These will step on each others toes eventually if there are multiple workqueue threads, and we end up with corrupt config ROM images. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-04-18firewire: fw-ohci: work around generation bug in TI controllers (fix AV/C ↵Stefan Richter
and more) Unlike the ohci1394 driver, fw-ohci uses the selfIDGeneration field of bus reset packets to determine the generation of incoming requests as per OHCI 1.1 clause 8.4.2.3. This is more precise --- provided that the controller inserts the correct generation. Texas Instruments chips often don't. This prevented the transmission of response packets, which for example broke AV/C transactions as used when communicating with miniDV cameras and any other AV/C devices. There is apparently no way to detect and adjust incorrect generations. Therefore we ignore the generation of bus reset packets from TI chips and use the generation of the self ID buffer instead. Alas this is received at a slightly wrong time. In rare cases, this could cause us to not respond to legitimate requests or to respond to expired requests. (The latter is less likely because the bus reset packet AR event is typically handled before the self ID complete event.) Bug reported by Mladen Kuntner, who was extraordinarily patient while dealing with the driver maintainers. Fix confirmed to be required and effective for TSB82AA2 and a TSB43AB22 or TSB43AB22A. https://bugzilla.redhat.com/show_bug.cgi?id=243081 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
2008-04-18firewire: fw-ohci: extend logging of bus generations and node IDStefan Richter
Extend the logging of "AR evt_bus_reset, link internal" to "AR evt_bus_reset, generation ${selfIDGeneration}". That way we can check whether this generation matches the one seen in self ID complete event logging. See OHCI 1.1 clause 8.4.2.3. Also extend logging of "firewire_ohci: * selfIDs, generation *" by "local node ID ffc*" in self ID logging to make the local node in AT/AR event logs more obvious. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
2008-04-18firewire: fw-ohci: conditionally log busReset interruptsStefan Richter
Add a debug option to watch bus reset interrupt events. Half of this patch is taken from Jarod Wilson's first version of the JMicron fix. BusReset interrupts are only generated if the respective module parameter flag was set before the controller is being initialized. Else we keep this event masked to reduce IRQ load in normal operation and to avoid potential problems with buggy chips. Note, this is unlike the other IRQ events whose logging can be enabled any time after chip initialization. This and the influence on what interrupts the chip generates is why I added an extra flag for it. Also, reorder the debug parameter flags according to their perceived usefulness. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jarod Wilson <jwilson@redhat.com>
2008-04-18firewire: fw-ohci: don't append to AT context when it's not activeJarod Wilson
I finally tracked down the issues with this JMicron PCI-e card in my possession to a failure to comply with section 7.2.3.2 of the OHCI 1.1 specification (thanks to Kristian for the pointer to illustrate that it is indeed a flaw in this card, not the driver). The controller should simply flush the packets we've appended to its AT queue if a bus reset occurs before they've been transmitted and we'll try again, but something goes wrong and the controller winds up hung. However, we can avoid the problem by simply checking if the IntEvent.busReset register had been set before we try appending to the AT context. When busReset is set, the AT context is completely halted until busReset is cleared, so there's no point in appending AT packets until the register is cleared. So at_context_queue_packet() now checks for busReset being set, and bails with an RCODE_GENERATION packet ack, which results in us trying to append the packet again after recognizing the fact there has been a bus reset, and clearing busReset. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-04-18firewire: fw-ohci: log regAccessFail eventsJarod Wilson
While trying to debug this piece of crap JMicron PCI-e controller in my possession, one thought was that perhaps I was encountering register access failures. I'm not, but logging them would be good, so we can see if they are a real problem we should be taking into account anywhere in the code. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (added list contact)