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path: root/drivers/scsi/fnic
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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>
2009-05-13[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>