- 04 Dec, 2009 40 commits
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Abhijeet Joglekar authored
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>
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Christof Schmitt authored
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:
Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by:
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Jiri Slaby authored
Stanse found a potential NULL dereference in scsi_kill_request. Instead of triggering BUG() in 'if (unlikely(cmd == NULL))' branch, the kernel will Oops earlier on cmd dereference. Move the dereferences after the if. Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Signed-off-by:
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adam radford authored
[jejb: fix up for new queue depth code] Signed-off-by:
Adam Radford <aradford@gmail.com> Signed-off-by:
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Douglas Gilbert authored
While testing scsi_debug with these patches I found a problem with the Block Limits VPD page function. The length returned by the inquiry_evpd_b0() function was too short. A patch to fix that and a cosmetic change (that the form factor of scsi_debug is less than 1.8 inches) is attached. Signed-off-by:
Douglas Gilbert <dgilbert@interlog.com> Signed-off-by:
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Alok Kataria authored
This is a driver for VMware's paravirtualized SCSI device, which should improve disk performance for guests running under control of VMware hypervisors that support such devices. Signed-off-by:
Alok N Kataria <akataria@vmware.com> Signed-off-by:
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Chandra Seetharaman authored
Make the activate function asynchronous by using blk_execute_rq_nowait() Signed-off-by:
Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by:
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Chandra Seetharaman authored
Make the activate function asynchronous by using blk_execute_rq_nowait() Signed-off-by:
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Chandra Seetharaman authored
Batch up MODE_SELECT in rdac device handler. LSI RDAC storage has the capability of handling mode selects for multiple luns in a same command. Make use of that ability to send as few MODE SELECTs as possible to the storage controller as possible. This patch creates a work queue and queues up activate requests when a MODE SELECT is sent down the wire. When that MODE SELECT completes, it compiles queued up activate requests for multiple luns into a single MODE SELECT. This reduces the time to do failover/failback of large number of LUNS. Signed-off-by:
Babu Moger <babu.moger@lsi.com> Signed-off-by:
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Chandra Seetharaman authored
Make scsi_dh_activate() function asynchronous, by taking in two additional parameters, one is the callback function and the other is the data to call the callback function with. Signed-off-by:
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Christof Schmitt authored
Adapt the change_queue_depth callback in zfcp for the new reason parameter. Simply pass each call back to the SCSI midlayer, there are no resource adjustments necessary for zfcp. Signed-off-by:
Vasu Dev <vasu.dev@intel.com> Signed-off-by:
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Vasu Dev authored
Adjust queue_depth on fc_change_queue_depth call back with reason SCSI_QDEPTH_RAMP_UP, no additional resource adjustments necessary for libfc. Signed-off-by:
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Vasu Dev authored
Current FC HBA queue_depth ramp up code depends on last queue full time. The sdev already has last_queue_full_time field to track last queue full time but stored value is truncated by last four bits. So this patch updates last_queue_full_time without truncating last 4 bits to store full value and then updates its only current usages in scsi_track_queue_full to ignore last four bits to keep current usages same while also use this field in added ramp up code. Adds scsi_handle_queue_ramp_up to ramp up queue_depth on successful completion of IO. The scsi_handle_queue_ramp_up will do ramp up on all luns of a target, just same as ramp down done on all luns on a target. The ramp up is skipped in case the change_queue_depth is not supported by LLD or already reached to added max_queue_depth. Updates added max_queue_depth on every new update to default queue_depth value. The ramp up is also skipped if lapsed time since either last queue ramp up or down is less than LLD specified queue_ramp_up_period. Adds queue_ramp_up_period to sysfs but only if change_queue_depth is supported since ramp up and queue_ramp_up_period is needed only in case change_queue_depth is supported first. Initializes queue_ramp_up_period to 120HZ jiffies as initial default value, it is same as used in existing lpfc and qla2xxx. -v2 Combined all ramp code into this single patch. -v3 Moves max_queue_depth initialization after slave_configure is called from after slave_alloc calling done. Also adjusted max_queue_depth check to skip ramp up if current queue_depth is >= max_queue_depth. -v4 Changes sdev->queue_ramp_up_period unit to ms when using sysfs i/f to store or show its value. Signed-off-by:
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Vasu Dev authored
The cmd_per_lun value is used by scsi-ml as fall back lowest queue_depth value but in case of libfc cmd_per_lun is set to same value as max queue_depth = 32. So this patch reduces cmd_per_lun value to 3 and configures each lun with default max queue_depth 32 in fc_slave_alloc. Signed-off-by:
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Mike Christie authored
This converts the libfc using scsi_track_queue_full to track the queue full from the change_queue_depth callback. Signed-off-by:
Mike Christie <michaelc@cs.wisc.edu> Signed-off-by:
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Mike Christie authored
This has scsi-ml call the change_queue_depth functions when we get a QUEUE_FULL. It will only change the queue depth if change_queue_depth is set because the LLD may have to modify some internal resources, so I thought this would be the safest route. Signed-off-by:
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Mike Christie authored
This patch modifies scsi_host_template->change_queue_depth so that it takes an argument indicating why it is being called. This will be used so that if a LLD needs to do some extra processing when handling queue fulls or later ramp ups, it can do so. This is a simple port of the drivers setting a change_queue_depth callback. In the patch I just have these LLDs adjust the queue depth if the user was requesting it. Signed-off-by:
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jack wang authored
This driver supports PMC-Sierra PCIe SAS/SATA 8x6G SPC 8001 chip based host adapters. Signed-off-by:
Jack Wang <jack_wang@usish.com> Signed-off-by:
Lindar Liu <lindar_liu@usish.com> Signed-off-by:
Tom Peng <tom_peng@usish.com> Signed-off-by:
Kevin Ao <aoqingyun@usish.com> Signed-off-by:
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Jayamohan Kallickal authored
This patch adds support for ring based wrbs Signed-off-by:
Jayamohan Kallickal <jayamohank@serverengines.com> Signed-off-by:
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Jayamohan Kallickal authored
This patch enables msix for be2iscsi. It also enables use of mcc_rings for fw commands. Since the mcc eq creation is dependent on msix I am sending as one patch Signed-off-by:
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Joe Eykholt authored
Timer crashes were caused by freeing a struct fc_rport_priv with a timer pending, causing the timer facility list to be corrupted. This was during FC uplink flap tests with a lot of targets. After discovery, we were doing an PLOGI on an rdata that was in DELETE state but not yet removed from the lookup list. This moved the rdata from DELETE state to PLOGI state. If the PLOGI exchange allocation failed and needed to be retried, the timer scheduling could race with the free being done by fc_rport_work(). When fc_rport_login() is called on a rport in DELETE state, move it to a new state RESTART. In fc_rport_work, when handling a LOGO, STOPPED or FAILED event, look for restart state. In the RESTART case, don't take the rdata off the list and after the transport remote port is deleted and exchanges are reset, re-login to the remote port. Note that the new RESTART state also corrects a problem we had when re-discovering a port that had moved to DELETE state. In that case, a new rdata was created, but the old rdata would do an exchange manager reset affecting the FC_ID for both the new rdata and old rdata. With the new state, the new port isn't logged into until after any old exchanges are reset. Signed-off-by:
Joe Eykholt <jeykholt@cisco.com> Signed-off-by:
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Abhijeet Joglekar authored
Signed-off-by:
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Abhijeet Joglekar authored
Signed-off-by:
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Abhijeet Joglekar authored
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:
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Chris Leech authored
I was running into several different panics under stress, which I traced down to a few different possible slab corruption issues in error handling paths. I have not yet looked into why these exchange sends fail, but with these fixes my test system is much more stable under stress than before. fc_elsct_send() could fail and either leave the passed in frame intact (failure in fc_ct/els_fill) or the frame could have been freed if the failure was is fc_exch_seq_send(). The caller had no way of knowing, and there was a potential double free in the error handling in fc_fcp_rec(). Make fc_elsct_send() always free the frame before returning, and remove the fc_frame_free() call in fc_fcp_rec(). While fc_exch_seq_send() did always consume the frame, there were double free bugs in the error handling of fc_fcp_cmd_send() and fc_fcp_srr() as well. Numerous calls to error handling routines (fc_disc_error(), fc_lport_error(), fc_rport_error_retry() ) were passing in a frame pointer that had already been freed in the case of an error. I have changed the call sites to pass in a NULL pointer, but there may be more appropriate error codes to use. Question: Why do these error routines take a frame pointer anyway? I understand passing in a pointer encoded error to the response handlers, but the error routines take no action on a valid pointer and should never be called that way. Signed-off-by:
Chris Leech <christopher.leech@intel.com> Signed-off-by:
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Yi Zou authored
Calls ndo_fcoe_enabled() of the associated netdev upon creating the FCoE instance to make sure LLD has all necessary resources allocated and setup properly before passing FCoE traffic. Similarly, calls ndo_fcoe_disable() upon destroying the FCoE instance on the associated netdev to allow the LLD to release all allocated resources for FCoE. Signed-off-by:
Yi Zou <yi.zou@intel.com> Signed-off-by:
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Yi Zou authored
In case of sequence offload, in fc_fcp_send_data(), the skb_fill_page_info() called may end up adding more frags to the skb_shinfo(fp_skb(fp))->frags[], exceeding SKB_MAX_FRAGS, this eventually corrupts the memory. I am adding the FR_FRAME_SG_LEN back, but as SKB_MAX_FRAGS -1, leaving 1 for our fcoe_eof_crc page. And send will be broken into multiple large sends if the frame already contains more frags than skb handle. Signed-off-by:
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Yi Zou authored
Add a define of FCOE_MTU as 2158 bytes and use FCOE_MTU when the LLD is found to support NETIF_F_FCOE_MTU. The lport->mfs is then calculated out of the 2158 FCOE_MTU. Otherwise, we stick with the netdev->mtu, i.e., LAN MTU. Also, change the notification on NETDEV_CHANGEMTU event to bypass changing mfs when LAN MTU is changed if NETIF_F_FCOE_MTU is supported. Signed-off-by:
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Mike Christie authored
When doing echo ethX > /sys..../destroy I am getting errors when the tear down succeeds. It looks like the reason for this is because the rc var is not getting set when the destruction works. This just sets it to zero. Signed-off-by:
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Vasu Dev authored
Reported-by:
Alex Lyakas <alexl@mellanox.co.il> Signed-off-by:
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Vasu Dev authored
Adds missing exch release when RRQ is accepted by calling fc_seq_ls_acc. Adds common exch release for fc_exch_els_rrq by use of out label. Reported-by:
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Vasu Dev authored
Initializing these libfc globals per lport could mess up exch allocation/free for existing lport. So this patch moves their initialization to fc_setup_exch_mgr so that these globals gets initialized only once for libfc. Reported-by:
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Joe Eykholt authored
It's possible and harmless to get FLOGI timeouts while in RESET state. Don't do a WARN_ON in that case. Also, split out the other WARN_ONs in fc_lport_timeout, so we can tell which one is hit by its line number. Signed-off-by:
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Joe Eykholt authored
Fix minor errors. A debug message said an RLIR was received instead of ECHO. "Expected" was misspelled in several places. Fix a type cast from u32 to __be32. Rob, Some of these may have been also taken care of in your other doc cleanup patch. Feel free to fold them in. Signed-off-by:
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Yi Zou authored
This bug is exposed when there is a link flap in LLD. Particularly, when it happens right after a SCSI write command is sent out, no FCP_DATA is sent, causing fsp->status_code to be set as FC_DATA_UNDRUN in fc_fcp_complete_locked even no SCSI status is received. Consequently, fc_io_compl treats this as DID_OK. This results in SCSI returning successful to the initial I/O request even there is no DATA actually sent. Particularly, if you run an I/O tool w/ data verification on, the read back for verification is gonna fail. This is fixed here by checking when FC_DATA_UNDRUN happens, SCSI status is received w/ FC_SRB_RCV_STATUS set in fsp->state. Signed-off-by:
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Robert Love authored
This argument isn't used, let's not pass it into the routine. Signed-off-by:
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Robert Love authored
These are a few functions that were not used by other modules. They did not need to be exported so this patch removes the EXPORT_SYMBOLS call for each. Signed-off-by:
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Yi Zou authored
Remove the redundant checking of netdev->netdev_ops as it will never be NULL. Signed-off-by:
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Yi Zou authored
xid 0 was used as an indication of invalid xid before but now xid 0 can be used as a valid exchange i. This patch fixes the ddp completion in fcp layer, i.e., in fc_fcp.c:fc_fcp_ddp_done() function, to make sure it does not use xid 0 for indication of an invalid xid, instead, it now uses use FC_XID_UNKNOWN for such indication. Signed-off-by:
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Joe Eykholt authored
A received Fibre Channel ELS PRLI request contains a bit that indicates whether the remote port supports certain retry processing sequences. The test for this bit was somehow coded to use multiply instead of AND! This case would apply only for target mode operation, and it is unlikely to be noticed as an initiator. Signed-off-by:
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