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path: root/drivers/ieee1394/sbp2.c
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2007-10-16ieee1394: sbp2: fix unsafe iteration over list of devicesStefan Richter
sbp2_host_reset and sbp2_handle_status_write are not serialized against sbp2_alloc_device and sbp2_remove_device. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-08-25ieee1394: sbp2: fix sbp2_remove_device for error casesStefan Richter
Bug found by Olaf Hering <olh@suse.de>: sbp2util_remove_command_orb_pool requires a valid lu->hi pointer. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-08-02ieee1394: revert "sbp2: enforce 32bit DMA mapping"Stefan Richter
Revert commit 0555659d63c285ceb7ead3115532e1b71b0f27a7 from 2.6.22-rc1. The dma_set_mask call somehow failed on a PowerMac G5, PPC64: http://lkml.org/lkml/2007/8/1/344 Should there ever occur a DMA mapping beyond the physical DMA range, a proper SBP-2 firmware will report transport errors. So let's leave it at that. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Tested-by: Olaf Hering <olh@suse.de>
2007-07-15Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds
* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (166 commits) [SCSI] ibmvscsi: convert to use the data buffer accessors [SCSI] dc395x: convert to use the data buffer accessors [SCSI] ncr53c8xx: convert to use the data buffer accessors [SCSI] sym53c8xx: convert to use the data buffer accessors [SCSI] ppa: coding police and printk levels [SCSI] aic7xxx_old: remove redundant GFP_ATOMIC from kmalloc [SCSI] i2o: remove redundant GFP_ATOMIC from kmalloc from device.c [SCSI] remove the dead CYBERSTORMIII_SCSI option [SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA [SCSI] Clean up scsi_add_lun a bit [SCSI] 53c700: Remove printk, which triggers because of low scsi clock on SNI RMs [SCSI] sni_53c710: Cleanup [SCSI] qla4xxx: Fix underrun/overrun conditions [SCSI] megaraid_mbox: use mutex instead of semaphore [SCSI] aacraid: add 51245, 51645 and 52245 adapters to documentation. [SCSI] qla2xxx: update version to 8.02.00-k1. [SCSI] qla2xxx: add support for NPIV [SCSI] stex: use resid for xfer len information [SCSI] Add Brownie 1200U3P to blacklist [SCSI] scsi.c: convert to use the data buffer accessors ...
2007-07-10ieee1394: sbp2: change some module parameters from int to boolStefan Richter
This is upwards compatible, except that integer values other than 0 or 1 are no longer accepted. But values like "Y", "N", "no", "nnoooh!" work now. Also, improve a comment on the serialize_io parameter and make the ORB_SET_EXCLUSIVE macro ultra-safe. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-31ieee1394: sbp2: offer SAM-conforming target port ID in sysfsStefan Richter
With "modprobe sbp2 long_ieee1394_id=y", the format of /sys/bus/scsi/devices/*:*:*:*/ieee1394_id is changed from e.g. 0001041010004beb:0:0 to 0001041010004beb:00042c:0000. The longer format fully conforms to object identifier sizes as per SAM(-2...4) and reflects what the SAM target port identifier is meant to contain: A Discovery ID allegedly specified by ISO/IEC 13213:1994 --- however there is no such thing; the authors of SAM probably meant Directory ID). Especially target nodes with multiple dynamically added targets may use Directory IDs to persistently identify target ports. The new format is independent of implementation details of nodemgr. Thus the same ieee1394_id attribute format can be implemented in the new firewire stack. The ieee1394_id is typically used to create persistently named links in /dev/disk/by-id. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-30[SCSI] Merge up to linux-2.6 headJames Bottomley
Conflicts: drivers/scsi/jazz_esp.c Same changes made by both SCSI and SPARC trees: problem with UTF-8 conversion in the copyright. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-05-27ieee1394: sbp2: include workqueue.hStefan Richter
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-27[SCSI] sbp2: convert to use the data buffer accessorsFUJITA Tomonori
- remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-04-30ieee1394: sbp2: include fixesAndrew Morton
drivers/ieee1394/sbp2.c: In function 'sbp2util_access_timeout': drivers/ieee1394/sbp2.c:399: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function) drivers/ieee1394/sbp2.c:399: error: (Each undeclared identifier is reported only once drivers/ieee1394/sbp2.c:399: error: for each function it appears in.) drivers/ieee1394/sbp2.c:399: warning: implicit declaration of function 'signal_pending' drivers/ieee1394/sbp2.c:399: warning: implicit declaration of function 'schedule_timeout' drivers/ieee1394/sbp2.c: In function 'sbp2_prep_command_orb_sg': drivers/ieee1394/sbp2.c:1438: warning: implicit declaration of function 'page_address' drivers/ieee1394/sbp2.c:1438: warning: passing argument 2 of 'dma_map_single' makes pointer from integer without a cast drivers/ieee1394/sbp2.c: In function 'sbp2_handle_status_write': drivers/ieee1394/sbp2.c:1842: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function) Possibly due to changes in -mm, but this file should explicitly include the headers for the stuff it uses. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (brought into alphabetic order)
2007-04-30ieee1394: sbp2: move some memory allocations into non-atomic contextStefan Richter
When the command ORB pool is created, the ORB list won't be accessed concurrently. Therefore we don't have to take the spinlock there. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: sbp2: optimize DMA direction of s/g tablesStefan Richter
Unlike the name suggests, "cmd->scatter_gather_element" holds only the s/g table, not the actual s/g elements. Since the table is only read but never written by the device, DMA_BIDIRECTIONAL can be replaced by DMA_TO_DEVICE which may be cheaper on some architectures. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-30ieee1394: sbp2: enforce 32bit DMA mappingStefan Richter
In order to use OHCI-1394 physical DMA, all s/g elements, s/g tables, ORBs, and response buffers have to reside within the first 4 GB of the FireWire controller's physical address space. Set the correct mask for DMA mappings. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-02-08ieee1394: sbp2: lower block queue alignment requirementStefan Richter
The old setting is copy & waste from usb-storage and doesn't apply to sbp2. There is only 4-byte alignment required for everything, except for S/G table elements which have to be 8-byte aligned according to the SBP-2 spec. (They happen to be ____cacheline_aligned in our implementation. Whether that's good is another question.) We now simply don't tune block queue alignment at all. The default alignment would surely never become anything else than a multiple of 4, else tons of calls to blk_queue_dma_alignment would have to be added everywhere in drivers/... Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-02-08ieee1394: sbp2: remove bogus "emulated" host flagStefan Richter
There is no emulation going on here. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-02-08ieee1394: sbp2: use a better wildcard for blacklistStefan Richter
0x000000 could be a valid value to match against, but anything bigger than 0xffffff cannot. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-01-10ieee1394: sbp2: fix probing of some DVD-ROM/RWsStefan Richter
Since commit 98e238cd42be6c0852da519303cf0182690f8d9f in Linux 2.6.19, "ieee1394: sbp2: don't prefer MODE SENSE 10", some FireWire DVD-ROMs and DVD-RWs were mistaken as CD-ROM because sr_mod now sent MODE SENSE 6. The MMC command set includes only MODE SENSE 10. http://bugzilla.kernel.org/show_bug.cgi?id=7800 This fix lets sbp2 switch scsi_device.use_10_for_rw on for MMC LUs. This should rather be done in the command set driver sr_mod, not in the sbp2 transport driver, and an according patch will follow for a next Linux release. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-30ieee1394: sbp2: fix bogus dma mappingStefan Richter
Need to use a PCI device, not a FireWire host device. Problem found by Andreas Schwab, mistake pointed out by Benjamin Herrenschmidt. http://ozlabs.org/pipermail/linuxppc-dev/2006-December/029595.html Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Tested-by: Andreas Schwab <schwab@suse.de>
2006-12-30ieee1394: sbp2: pass REQUEST_SENSE through to the targetStefan Richter
Delete some incorrect code, left over from the initial driver submission in March 2001. SBP-2 targets should provide sense data via the SBP-2 status block (autosense). We have to pass the REQUEST_SENSE command through to targets which don't implement autosense, if there are any, and to accomodate application clients which use this command. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: code formatting around work_struct stuffStefan Richter
Merge is finished, can bring the code in readable style again. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: Consolidate driver registeringBen Collins
This patch consolidates some bookkeeping for driver registering. It closely models what pci_register_driver() does. The main addition is that the owner of the driver is set, so we get a proper symlink for /sys/bus/ieee1394/driver/*/module. Also moves setting of name and bus type into nodemgr. Because of this, we can remove the EXPORT_SYMBOL for ieee1394_bus_type, since it's now only used in ieee1394.ko. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: convert from PCI DMA to generic DMAStefan Richter
API conversion without change in functionality Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: wrap two functions into oneStefan Richter
Move the body of a function into its only caller. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: update comment on things to doStefan Richter
Some people actually look at those comments. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: use list_move_tail()Stefan Richter
It's OK to reorder list_del() and sbp2util_free_command_dma() here. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: more concise names for types and variablesStefan Richter
"struct scsi_id_instance_data" represents a logical unit. Rename it to "struct sbp2_lu", and "scsi_id" to "lu". Rename some other variables too. Wrap almost all lines after at most 80 columns. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: remove unused struct membersStefan Richter
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: proper unit in module parameter descriptionStefan Richter
It's 2^20 bit/s, not 0.001 bit. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: clean up sbp2_ namespaceStefan Richter
Prepend sbp2*_ to anything globally defined in sbp2.c except for some macros. Strip sbp2_ from names of struct members. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: some conditions in queue_command are unlikelyStefan Richter
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: remove superfluous commentsStefan Richter
And update and reformat remaining comments. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: delayed_work -> work_structStefan Richter
This work is not delayed. Also bring the code format in a state which reduces my work to merge pending sbp2 patchs. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: remove debug macrosStefan Richter
No need to keep them in released sources. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: consolidate log levelsStefan Richter
Replace some calls to SBP2_ERR and SBP2_WARN by SBP2_INFO. Remove logging macros SBP2_NOTICE and SBP2_WARN. Remove direct usage of HPSB_ logging macros. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: remove duplicate codeStefan Richter
The same case is handled further below in sbp2scsi_complete_command. Note, the second version behaves slightly different but looks preferable. It's an extremely unlikely case by the way. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: remove dead codeStefan Richter
This has been within #if 0 for a long time and is wrong anyway. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: clean up function declarationsStefan Richter
Remove unnecessary function prototypes. Remove variable names from function prototypes. Move declarations from sbp2.h to sbp2.c. Move definitions of driver templates together near the top of sbp2.c. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: remove irritating log messageStefan Richter
The queue depth can be read from /sys/bus/scsi/devices/*/queue_depth, so don't log it. And the hint about speed improvements is misleading, at least under current kernels. If serialization is switched off, read performance is typically increased by less than 10%. (I did not test write performance recently.) On the other hand, serialize_io=0 is not yet safe due to some implementation issues that are not trivial to fix. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-12-07ieee1394: sbp2: slightly reorder sbp2scsi_abortStefan Richter
Put the target's fetch agent into reset state before the underlying ORB DMA is unmapped and the ->done handler is called. It is highly unlikely but the target could access that ORB right before sbp2 sends the reset request. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-11-22WorkStruct: make allyesconfigDavid Howells
Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
2006-09-17ieee1394: sbp2: enable auto spin-up for all SBP-2 devicesStefan Richter
This is a follow-up to patch "ieee1394: sbp2: enable auto spin-up for Maxtor disks". When I 'ejected' an OXUF922 based HDD from a Mac OS X box, it was spun down by the Mac and did not spin up by itself when attached to a Linux box right after that. The first SCSI command that required the bridge to access the drive ended in sda:<6>sd 18:0:0:0: Device not ready: <6>: Current: sense key: Not Ready Additional sense: Logical unit not ready, initializing cmd. required Therefore the flag which instructs scsi_mod to send START STOP UNIT with START=1 ("make medium ready") after such a condition is now enabled unconditionally for all FireWire storage devices. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17ieee1394: sbp2: don't prefer MODE SENSE 10Stefan Richter
In the old days, sbp2 used to coerce all MODE SENSE commands into the 10 bytes version. When all command set conversions were removed from sbp2 several months ago, sdev->use_10_for_ms = 1 was added. Meaning, higher SCSI layers preferred the 10 bytes version but would try the 6 bytes version if the former failed. Recently, a problem with the 10 bytes version was discovered. An Initio INIC-1530 firmware accepted the 10 bytes version but replied with bogus data, showing the HDD incorrectly as write-protected. Since RBC actually mandates MODE SENSE (6), I checked which version was sent by Windows XP and Mac OS X 10.3 to an SBP-2 target hosted by Linux --- it was the 6 bytes version. (Exception: OS X sent the 10 bytes version to an MMC target. RBC and SBC got MODE SENSE (6).) Therefore, drop the use_10_for_ms flag from sbp2. Now the upper layers will try MODE SENSE (6) before MODE SENSE (10) on all SBP-2 devices. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17ieee1394: sbp2: prevent rare deadlock in shutdownStefan Richter
Scsi_remove_device() may go into uninterruptible sleep if blocked. Therefore sbp2_remove() unblocks the Scsi_Host before the device is requested to be removed. But there could be another 1394 bus reset after that which would block the host again. The 1394 subsystem won't call sbp2_update() concurrently to sbp2_remove(), which is why there is no chance for sbp2_remove() to be unblocked by sbp2_update(). The fix is to tell sbp2's bus reset handler when a device is to be shut down so that it skips scsi_block_requests() on that host. As before, any new commands after a reset without reconnect will be failed quickly by sbp2scsi_queuecommand(). In the long term, means to go without scsi_block_requests() should be found. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17ieee1394: sbp2: update includesStefan Richter
Remove unused includes. Add missing includes, i.e. explicitly include all used headers. Sort includes alphabetically. Replace one call to signal_pending(current) to avoid to include headers just for this line. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17ieee1394: sbp2: better handling of transport errorsStefan Richter
If the target signals a transport failure via status block, complete the request with DID_BUSY to indicate to the SCSI subsystem that the command may succeed when retried. Also log diagnostic information if the status block shows a transport related problem. It may point to hardware faults. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17ieee1394: sbp2: recheck node generation in sbp2_updateStefan Richter
While sbp2_update() is doing its duties after a bus reset, another reset could happen. Don't accept new requests until the next undisturbed sbp2_update() or until sbp2_remove(). Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17ieee1394: sbp2: safer agent reset in error handlersStefan Richter
The scsi_host_template's eh_abort_handler and eh_device_reset_handler are allowed to sleep. Use this to run sbp2_agent_reset in the more reliable mode which returns _after_ its write transaction was finished. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17ieee1394: sbp2: handle "sbp2util_node_write_no_wait failed"Stefan Richter
Fix for http://bugzilla.kernel.org/show_bug.cgi?id=6948 Because sbp2 writes to the target's fetch agent's registers from within atomic context, it cannot sleep to guaranteedly get a free transaction label. This may repeatedly lead to "sbp2util_node_write_no_wait failed" and consequently to SCSI command abortion after timeout. A likely cause is that many queue_command softirqs may occur before khpsbpkt (the ieee1394 driver's thread which cleans up after finished transactions) is woken up to recycle tlabels. Sbp2 now schedules a workqueue job whenever sbp2_link_orb_command fails in sbp2util_node_write_no_wait. The job will reliably get a transaction label because it can sleep. We use the kernel-wide shared workqueue because it is unlikely that the job itself actually needs to sleep. In the improbable case that it has to sleep, it doesn't need to sleep long since the standard transaction timeout is 100ms. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17ieee1394: safer definition of empty macrosStefan Richter
A deactivated macro, defined as "#define foo(bar)", will result in silent corruption if somebody forgets a semicolon after a call to foo. Replace it by "#define foo(bar) do {} while (0)" which will reveal any respective syntax errors. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2006-09-17the scheduled removal of drivers/ieee1394/sbp2.c:force_inquiry_hackAdrian Bunk
This patch contains the scheduled removal of the force_inquiry_hack module parameter. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>