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path: root/drivers/scsi/fnic
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2013-02-22[SCSI] fnic: Fnic Trace UtilityHiral Patel
Fnic Trace utility is a tracing functionality built directly into fnic driver to trace events. The benefit that trace buffer brings to fnic driver is the ability to see what it happening inside the fnic driver. It also provides the capability to trace every IO event inside fnic driver to debug panics, hangs and potentially IO corruption issues. This feature makes it easy to find problems in fnic driver and it also helps in tracking down strange bugs in a more manageable way. Trace buffer is shared across all fnic instances for this implementation. Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-02-22[SCSI] fnic: New debug flags and debug log messagesHiral Patel
Added new fnic debug flags for identifying IO state at every stage of IO while debugging and also added more log messages for better debugging capability. Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com> Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-02-22[SCSI] fnic: fnic driver may hit BUG_ON on device resetHiral Patel
The issue was observed when LUN Reset is issued through IOCTL or sg_reset utility. fnic driver issues LUN RESET to firmware. On successful completion of device reset, driver cleans up all the pending IOs that were issued prior to device reset. These pending IOs are expected to be in ABTS_PENDING state. This works fine, when the device reset operation resulted from midlayer, but not when device reset was triggered from IOCTL path as the pending IOs were not in ABTS_PENDING state. execution path hits panic if the pending IO is not in ABTS_PENDING state. Changes: The fix replaces BUG_ON check in fnic_clean_pending_aborts() with marking pending IOs as ABTS_PENDING if they were not in ABTS_PENDING state and skips if they were already in ABTS_PENDING state. An extra check is added to validate the abort status of the commands after a delay of 2 * E_D_TOV using a helper function. The helper function returns 1 if it finds any pending IO in ABTS_PENDING state, belong to the LUN on which device reset was issued else 0. With this, device reset operation returns success only if the helper funciton returns 0, otherwise it returns failure. Other changes: - Removed code in fnic_clean_pending_aborts() that returns failure if it finds io_req NULL, instead of returning failure added code to continue with next io - Added device reset flags for debugging in fnic_terminate_rport_io, fnic_rport_exch_reset, and fnic_clean_pending_aborts Signed-off-by: Narsimhulu Musini <nmusini@cisco.com> Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-02-22[SCSI] fnic: Fix SGEs limitHiral Patel
Driver allows IOs with more SGEs than max SGEs supported by Palo. The current max SGEs supported by the fnic driver is 1024. The current register settings on Palo supports a max of 256 only. Palo would return any IO with more than 256 SGEs with an error indicating INVALID_SGLS. Fnic driver should limit the max supported SGLs in the driver to 256 to avoid this error. Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com> Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-02-22[SCSI] fnic: fixing issues in device and firmware reset codeHiral Patel
1. Handling overlapped firmware resets This fix serialize multiple firmware resets to avoid situation where fnic device fails to come up for link up event, when firmware resets are issued back to back. If there are overlapped firmware resets are issued, the firmware reset operation checks whether there is any firmware reset in progress, if so it polls for its completion in a loop with 100ms delay. 2. Handling device reset timeout fnic_device_reset code has been modified to handle Device reset timeout: - Issue terminate on device reset timeout. - Introduced flags field (one of the scratch fields in scsi_cmnd). With this, device reset request would have DEVICE_RESET flag set for other routines to determine the type of the request. Also modified fnic_terminate_rport_io, fnic_rport_exch_rset, completion routines to handle SCSI commands with DEVICE_RESET flag. 3. LUN/Device Reset hangs when issued through IOCTL using utilities like sg_reset. Each SCSI command is associated with a valid tag, fnic uses this tag to retrieve associated scsi command on completion. the LUN/Device Reset issued through IOCTL resulting into a SCSI command that is not associated with a valid tag. So fnic fails to retrieve associated scsi command on completion, which causes hang. This fix allocates tag, associates it with the scsi command and frees the tag, when the operation completed. 4. Preventing IOs during firmware reset. Current fnic implementation allows IO submissions during firmware reset. This fix synchronizes IO submissions and firmware reset operations. It ensures that IOs issued to fnic prior to reset will be issued to the firmware before firmware reset. Signed-off-by: Narsimhulu Musini <nmusini@cisco.com> Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-01-29[SCSI] fnic: fix for trusted cosHiral Patel
Modified fnic driver to let hardware insert the COS value. Set bit in descriptor to 0 telling hardware to use its lif COS configurations to insert the COS value in the frames. Signed-off-by: Narsimhulu Musini <nmusini@cisco.com> Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-01-03Drivers: scsi: remove __dev* attributes.Greg Kroah-Hartman
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Adam Radford <linuxraid@lsi.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2011-06-29[SCSI] fnic: fix incorrect use of SLAB_CACHE_DMA flagAbhijeet Joglekar
Driver was incorrectly using the SLAB_CACHE_DMA flag when creating a cache for SGLs. fnic device does not have 24-bit DMA restrictions. Remove the flag and allocations from ZONE_DMA. Thanks to Roland Dreier and David Rientjes for pointing out the bug. Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-02-12[SCSI] fnic: Bumping up fnic version from 1.4.0.145 to 1.5.0.1.Venkata Siva Vijayendra Bhamidipati
Signed-off-by: Venkata Siva Vijayendra Bhamidipati <vbhamidi@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-02-12[SCSI] fnic: fix memory leakVenkata Siva Vijayendra Bhamidipati
Fix memory leak arising due to incorrect freeing of allocated memory for vnic stats when unregistering a vnic. Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Venkata Siva Vijayendra Bhamidipati <vbhamidi@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-11-16SCSI host lock push-downJeff Garzik
Move the mid-layer's ->queuecommand() invocation from being locked with the host lock to being unlocked to facilitate speeding up the critical path for drivers who don't need this lock taken anyway. The patch below presents a simple SCSI host lock push-down as an equivalent transformation. No locking or other behavior should change with this patch. All existing bugs and locking orders are preserved. Additionally, add one parameter to queuecommand, struct Scsi_Host * and remove one parameter from queuecommand, void (*done)(struct scsi_cmnd *) Scsi_Host* is a convenient pointer that most host drivers need anyway, and 'done' is redundant to struct scsi_cmnd->scsi_done. Minimal code disturbance was attempted with this change. Most drivers needed only two one-line modifications for their host lock push-down. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Acked-by: James Bottomley <James.Bottomley@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-07[SCSI] fnic: prep for fc host dev loss tmo supportMike Christie
This removes the driver's get_host_def_dev_loss_tmo callback and just has the driver set the dev loss using the fc class fc_host_dev_loss_tmo macro like is done for other fc params. This also adds a set rport dev loss function so the fc class host dev loss tmp sysfs support being added in the fc class patch can update rports. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-09-05[SCSI] fnic: do not reset dev_loss_tmo in slave calloutMike Christie
This fixes a bug where the driver was resetting the rport dev_loss_tmo when devices were added by adding support for the get_host_def_dev_loss_tmo callout. Patch has only been compile tested. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-08-11scsi: remove private BIT macrosAndrew Morton
A couple of scsi drivers define a BIT() macro, duplicating the one in bitops.h. Cc: Jing Huang <huangj@brocade.com> Cc: Robert Love <robert.w.love@intel.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-07-28[SCSI] libfcoe: fcoe: fnic: add FIP VN2VN point-to-multipoint supportJoe Eykholt
The FC-BB-6 committee is proposing a new FIP usage model called VN_port to VN_port mode. It allows VN_ports to discover each other over a loss-free L2 Ethernet without any FCF or Fibre-channel fabric services. This is point-to-multipoint. There is also a variant of this called point-to-point which provides for making sure there is just one pair of ports operating over the Ethernet fabric. We add these new states: VNMP_START, _PROBE1, _PROBE2, _CLAIM, and _UP. These usually go quickly in that sequence. After waiting a random amount of time up to 100 ms in START, we select a pseudo-random proposed locally-unique port ID and send out probes in states PROBE1 and PROBE2, 100 ms apart. If no probe responses are heard, we proceed to CLAIM state 400 ms later and send a claim notification. We wait another 400 ms to receive claim responses, which give us a list of the other nodes on the network, including their FC-4 capabilities. After another 400 ms we go to VNMP_UP state and should start interoperating with any of the nodes for whic we receivec claim responses. More details are in the spec.j Add the new mode as FIP_MODE_VN2VN. The driver must specify explicitly that it wants to operate in this mode. There is no automatic detection between point-to-multipoint and fabric mode, and the local port initialization is affected, so it isn't anticipated that there will ever be any such automatic switchover. It may eventually be possible to have both fabric and VN2VN modes on the same L2 network, which may be done by two separate local VN_ports (lports). When in VN2VN mode, FIP replaces libfc's fabric-oriented discovery module with its own simple code that adds remote ports as they are discovered from incoming claim notifications and responses. These hooks are placed by fcoe_disc_init(). A linear list of discovered vn_ports is maintained under the fcoe_ctlr struct. It is expected to be short for now, and accessed infrequently. It is kept under RCU for lock-ordering reasons. The lport and/or rport mutexes may be held when we need to lookup a fcoe_vnport during an ELS send. Change fcoe_ctlr_encaps() to lookup the destination vn_port in the list of peers for the destination MAC address of the FIP-encapsulated frame. Add a new function fcoe_disc_init() to initialize just the discovery portion of libfcoe for VN2VN mode. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-07-28[SCSI] libfcoe: fcoe: fnic: change fcoe_ctlr_init interface to specify modeJoe Eykholt
There are three modes that libfcoe currently supports, and a new one is coming. Change the fcoe_ctlr_init() interface to add the mode desired. This should not change any functionality. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-07-27[SCSI] fnic: fnic_scsi.c: clean upRoel Kluin
In fnic_abort_cmd() and fnic_device_reset() assign `rport' earlier to make FNIC_SCSI_DBG() calls cleaner. In fnic_clean_pending_aborts() `rport' is not used. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Acked-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11[SCSI] fcoe, fnic, libfc: increased CDB size to 16 bytes for fcoe.Vasu Dev
No reason to restrict CDB size to 12 bytes in fcoe, so increased to 16 so that 16 bytes SCSI CDB doesn't fail. Uses common define to set max_cmd_len for fcoe and fnic, fnic is already setting max_cmd_len to 16. sg_readcap -l fails without this fix. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11[SCSI] fnic: Change fnic_flush_tx() to flush tx instead of rx queueBrian Uchino
fnic_flush_tx() is used to send frames held while fabric login is in progress. The frames are held in tx_queue, but fnic_flush_tx() was incorrectly flushing from recv_queue which is used for received frames. Signed-off-by: Brian Uchino <buchino@cisco.com> Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11[SCSI] fnic: Update version to 1.4.0.145Brian Uchino
New fnic version to mark inclusion of tx_flush bugfix. Signed-off-by: Brian Uchino <buchino@cisco.com> Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-02-17[SCSI] fnic: Set fnic driver versionVenkata Siva Vijayendra Bhamidipati
Update fnic driver version. Signed-off-by: Venkata Siva Vijayendra Bhamidipati <vbhamidi@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17[SCSI] fnic: lport stats need to be initialized in fnic_probe()Venkata Siva Vijayendra Bhamidipati
Incorrect initialization of lport stats in fnic_probe() causes fnic to crash at bootup and a node hang if fip is enabled and all links are brought up after fnic is loaded. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Venkata Siva Vijayendra Bhamidipati <vbhamidi@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17[SCSI] fnic: Allow multicast and unicast address registrations for fnicVenkata Siva Vijayendra Bhamidipati
To enable FIP support in fnic, we have to register with hardware to receive FIP solication frames on a well-known multicast address. Before FIP support, the firmware interface allowed multicast address registrations only for enic devices. This is a minor change in fnic to allow the firmware interface to now register mcast addresses for fnic too. Signed-off-by: Brian Uchino <buchino@cisco.com> Signed-off-by: Herman Lee <hermlee@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04[SCSI] fnic: enable bsg pass-thru for fcpingJoe Eykholt
Add initialization of .bsg_request in the scsi_transport_fc template so that fcping works. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04[SCSI] fnic: Add FIP support to the fnic driverJoe Eykholt
Use libfcoe as a common FIP implementation with fcoe. FIP or non-FIP mode is fully automatic if the firmware supports and enables it. Even if FIP is not supported, this uses libfcoe for the non-FIP handling of FLOGI and its response. Use the new lport_set_port_id() notification to capture successful FLOGI responses and port_id resets. While transitioning between Ethernet and FC mode, all rx and tx FC frames are queued. In Ethernet mode, all frames are passed to the exchange manager to capture FLOGI responses. Change to set data_src_addr to the ctl_src_addr whenever it would have previously been zero because we're not logged in. This seems safer so we'll never send a frame with a 0 source MAC. This also eliminates a special case for sending FLOGI frames. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04[SCSI] libfc: changes to libfc_host_alloc to consolidate initialization with ↵Chris Leech
allocation I'd like to keep basic initialization together with allocation, which means this can't just be a tail-call to scsi_host_alloc. This is needed to create a generic libfc host allocation routine for NPIV VN_Ports, which will share the exchange ID space (through sharing exchange manager structures) with the parent lport. In order to clone the exchange manager list when the lport is allocated, the list head must be initialized earlier. Also, update fnic to use the libfc_host_alloc so that later changes do not break it. (contribution by Joe Eykholt) Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04[SCSI] fnic: Allocate OS interrupt resources just before enabling interruptsAbhijeet Joglekar
The OS interrupt vectors were getting allocated before the interrupt resources were mapped from hardware. For Legacy interrupts, since they are shared with other devices, as soon as an interrupt is registered with the OS, it can fire while the fnic isr resource is still unmapped. This can cause crash because of access to unmapped resources. For MSIX and MSI, since interrupts are not shared with other devices, this problem didnt happen, because the interrupt is enabled as the last step before returning from _probe. For Legacy however, since the interrupt is shared, the handler can be called as soon as it is registered. Solution is to register interrupt handlers with OS as last step before enabling device interrupts. Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04[SCSI] scsi_transport_fc: Introduce helper function for blocking scsi_ehChristof Schmitt
Move the duplicated code from FC LLDs to SCSI FC transport class. Acked-by: James Smart <james.smart@emulex.com> Acked-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Acked-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04[SCSI] fnic: Pad the unused bytes of CDB to 0sAbhijeet Joglekar
Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04[SCSI] fnic: Set max_cmd_len to driver supported CDB lengthAbhijeet Joglekar
Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04[SCSI] fnic: Process all cq entries per ISRAbhijeet Joglekar
Driver was processing a fixed max number of cq descriptors per ISR. For instance, for the SCSI IO queue, number of IOs processed per ISR were 8. If hardware writes 9 cq descriptors to the cq and generates an interrupt, driver would process only 8 descriptors and decrement the outstanding credit count by 8. Unless another interrupt event happens, the hw does not generate any additional interrupt. This results in the cq descriptor sitting in the queue without being procesed and can cause IO timeouts and aborts. Modify all ISR functions to process all queued cq descriptors in one shot. Since bulk of ELS frame processing is done in thread context and bulk of SCSI IO processing is done in soft ISR deferred context, the cycles spent in the ISR per cq descriptor is small. Signed-off-by: Herman Lee <hermlee@cisco.com> Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-08-22[SCSI] fcoe, fnic, libfc: modifies current code paths to use EM anchor listVasu Dev
Modifies current code to use EM anchor list in EM allocation, EM free, EM reset, exch allocation and exch lookup code paths. 1. Modifies fc_exch_mgr_alloc to accept EM match function and then have allocated EM added to the lport using fc_exch_mgr_add API while also updating EM kref for newly added EM. 2. Updates fc_exch_mgr_free API to accept only lport pointer instead EM and then have this API free all EMs of the lport from EM anchor list. 3. Removes single lport pointer link from the EM, which was used in associating lport pointer in newly allocated exchange. Instead have lport pointer passed along new exchange allocation call path and then store passed lport pointer in newly allocated exchange, this will allow a single EM instance to be used across more than one lport and used in EM reset to reset only lport specific exchanges. 4. Modifies fc_exch_mgr_reset to reset all EMs from the EM anchor list of the lport, adds additional exch lport pointer (ep->lp) check for shared EM case to reset exchange specific to a lport requested reset. 5. Updates exch allocation API fc_exch_alloc to use EM anchor list and its anchor match func pointer. The fc_exch_alloc will walk the list of EMs until it finds a match, a match will be either null match func pointer or call to match function returning true value. 6. Updates fc_exch_recv to accept incoming frame on local port using only lport pointer and frame pointer without specifying EM instance of incoming frame. Instead modified fc_exch_recv to locate EM for the incoming frame by matching xid of incoming frame against a EM xid range. This change was required to use EM list in libfc Rx path and after this change the lport fc_exch_mgr pointer emp is not needed anymore, so removed emp pointer. 7. Updates fnic for removed lport emp pointer and above modified libfc APIs fc_exch_recv, fc_exch_mgr_alloc and fc_exch_mgr_free. 8. Removes exch_get and exch_put from libfc_function_template as these are no longer needed with EM anchor list and its match function use. Also removes its default function fc_exch_get. A defect this patch introduced regarding the libfc initialization order in the fnic driver was fixed by Joe Eykholt <jeykholt@cisco.com>. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-06-25[SCSI] fnic: use DMA_BIT_MASK(nn) instead of deprecated DMA_nnBIT_MASKAbhijeet Joglekar
Robert Love reported warning while building fnic_main.c: drivers/scsi/fnic/fnic_main.c:478: warning: `DMA_nnBIT_MASK' is deprecated. Replaced use of DMA_nnBIT_MASK by DMA_BIT_MASK(nn) Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-06-25[SCSI] fnic: remove redundant BUG_ONs and fix checks on unsignedRoel Kluin
The shost sg tablesize is set to FNIC_MAX_SG_DESC_CNT and fnic uses scsi_dma_map, so both BUG_ONs can be removed. scsi_dma_map may return -ENOMEM, sg_count should be int to catch that. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-05-23[SCSI] libfc,fcoe,fnic: Separate rport and lport max retry countsAbhijeet Joglekar
This allows fnic to configure number of retries for lport and rport separately. Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Acked-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-05-14[SCSI] fnic: Add new Cisco PCI-Express FCoE HBAAbhijeet Joglekar
fnic is a driver for the Cisco PCI-Express FCoE HBA Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com> Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>