- 19 Apr, 2017 7 commits
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Cathy Avery authored
Included in the current storvsc driver for Hyper-V is the ability to access luns on an FC fabric via a virtualized fiber channel adapter exposed by the Hyper-V host. The driver also attaches to the FC transport to allow host and port names to be published under /sys/class/fc_host/hostX. Current customer tools running on the VM require that these names be available in the well known standard location under fc_host/hostX. This patch stubs in an rport per fc_host and sets its rport role as FC_PORT_ROLE_FCP_DUMMY_INITIATOR to indicate to the fc_transport that it is a pseudo rport in order to scan the scsi stack via echo "- - -" > /sys/class/scsi_host/hostX/scan. Signed-off-by:
Cathy Avery <cavery@redhat.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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Cathy Avery authored
This patch allows scsi drivers that expose virturalized fibre channel devices but that do not expose rports to successfully rescan the scsi bus via echo "- - -" > /sys/class/scsi_host/hostX/scan. Drivers can create a pseudo rport and indicate FC_PORT_ROLE_FCP_DUMMY_INITIATOR as the rport's role in fc_rport_identifiers. This insures that a valid scsi_target_id is assigned to the newly created rport and it can meet the requirements of fc_user_scan_tgt calling scsi_scan_target. Signed-off-by:
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David Gibson authored
Passed through SCSI targets may have transfer limits which come from the host SCSI controller or something on the host side other than the target itself. To make this work properly, the hypervisor can adjust the target's VPD information to advertise these limits. But for that to work, the guest has to look at the VPD pages, which we won't do by default if it is an SPC-2 device, even if it does actually support it. This adds a workaround to address this, forcing devices attached to a virtio-scsi controller to always check the VPD pages. This is modelled on a similar workaround for the storvsc (Hyper-V) SCSI controller, although that exists for slightly different reasons. A specific case which causes this is a volume from IBM's IPR RAID controller (which presents as an SPC-2 device, although it does support VPD) passed through with qemu's 'scsi-block' device. [mkp: fixed typo] Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Acked-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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Maurizio Lombardi authored
This patch fixes a potential buffer overflow in lpfc_nvme_info_show(). Signed-off-by:
Maurizio Lombardi <mlombard@redhat.com> Reviewed-by:
Ewan D. Milne <emilne@redhat.com> Acked-by:
James Smart <james.smart@broadcom.com> Signed-off-by:
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Varun Prakash authored
Signed-off-by:
Varun Prakash <varun@chelsio.com> Signed-off-by:
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Colin Ian King authored
The check for an unsigned long being less than zero is always false so it is a redundant check and can be removed. Detected by static analysis with by PVS-Studio Signed-off-by:
Colin Ian King <colin.king@canonical.com> Reviewed-by:
Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Signed-off-by:
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NeilBrown authored
mempool_alloc() cannot fail when passed GFP_NOIO or any other gfp setting that is permitted to sleep. So remove this pointless code. Signed-off-by:
NeilBrown <neilb@suse.com> Acked-by:
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- 14 Apr, 2017 20 commits
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Miguel Bernal Marin authored
storvsc_on_channel_callback is a void function and the return statement at the end is not useful. Found with checkpatch. Signed-off-by:
Miguel Bernal Marin <miguel.bernal.marin@linux.intel.com> Reviewed-by:
K. Y. Srinivasan <kys@microsoft.com> Signed-off-by:
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Miguel Bernal Marin authored
Use kcalloc for allocating an array instead of kzalloc with multiply, kcalloc is the preferred API. Found with checkpatch. Signed-off-by:
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Matthew R. Ochs authored
As an enhancement to distribute requests to multiple hardware queues, add the infrastructure to hash a SCSI command into a particular hardware queue. Support the following scenarios when deriving which queue to use: single queue, tagging when SCSI-MQ enabled, and simple hash via CPU ID when SCSI-MQ is disabled. Rather than altering the existing send API, the derived hardware queue is stored in the AFU command where it can be used for sending a command to the chosen hardware queue. Signed-off-by:
Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by:
Uma Krishnan <ukrishn@linux.vnet.ibm.com> Signed-off-by:
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Matthew R. Ochs authored
As staging for supporting multiple hardware queues, add an attribute to show and set the current number of hardware queues for the host. Support specifying a hard limit or a CPU affinitized value. This will allow the number of hardware queues to be tuned by a system administrator. Signed-off-by:
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Uma Krishnan authored
Introduce multiple hardware queues to improve legacy I/O path performance. Each hardware queue is comprised of a master context and associated I/O resources. The hardware queues are initially implemented as a static array embedded in the AFU. This will be transitioned to a dynamic allocation in a later series to improve the memory footprint of the driver. Signed-off-by:
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Matthew R. Ochs authored
The method used to decode asynchronous interrupts involves unnecessary loops to match up bits that are set with corresponding entries in the asynchronous interrupt information table. This algorithm is wasteful and does not scale well as new status bits are supported. As an improvement, use the for_each_set_bit() service to iterate over the asynchronous status bits and refactor the information table such that it can be indexed by bit position. Signed-off-by:
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Matthew R. Ochs authored
As a general cleanup, address all reasonable checkpatch warnings and errors. These include enforcement of comment styles and including named identifiers in function prototypes. Signed-off-by:
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Matthew R. Ochs authored
Validation statements to enforce assumptions about specific defines are not being evaluated by the compiler due to the fact that they reside in a routine that is not used. To activate them, call the routine as part of module initialization. As an additional, related cleanup, remove the now-defunct CXLFLASH_NUM_CMDS. Signed-off-by:
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Matthew R. Ochs authored
Devices supported by the cxlflash driver are fully coherent and do not require a bus address mapping. Avoid unnecessary path length by using the virtual address and length already present in the scatter-gather entry. Signed-off-by:
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Matthew R. Ochs authored
An EEH during probe can lead to a crash as the recovery thread races with the probe thread. To avoid this issue, introduce new states to fence out EEH recovery until probe has completed. Also ensure the reset wait queue is flushed during device removal to avoid orphaned threads. Signed-off-by:
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Matthew R. Ochs authored
Update the driver to allow for future cards with 4 ports. Signed-off-by:
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Matthew R. Ochs authored
Update the SISlite header to support 4 ports as outlined in the SISlite specification. Address fallout from structure renames and refreshed organization throughout the driver. Determine the number of ports supported by a card from the global port selection mask register reset value. Signed-off-by:
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Matthew R. Ochs authored
As staging to support FC-related updates to the SISlite specification, introduce helper routines to obtain references to FC resources that exist within the global map. This will allow changes to the underlying global map structure without impacting existing code paths. Signed-off-by:
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Matthew R. Ochs authored
At present, the cxlflash driver only supports hardware with two FC ports. The code was initially designed with this assumption and is dependent on having two FC ports - adding more ports will break logic within the driver. To mitigate this issue, remove the existing port assumptions and transition the code to support more than two ports. As a side effect, clarify the interpretation of the DK_CXLFLASH_ALL_PORTS_ACTIVE flag. Signed-off-by:
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Matthew R. Ochs authored
Transition from a static number of FC ports to a value that is derived during probe. For now, a static value is used but this will later be based on the type of card being configured. Signed-off-by:
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Matthew R. Ochs authored
As staging for future function, pass the config pointer instead of the AFU pointer for port-related sysfs helper routines. Signed-off-by:
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Matthew R. Ochs authored
Currently, RRQ processing takes place on hardware interrupt context. This can be a heavy burden in some environments due to the overhead encountered while completing RRQ entries. In an effort to improve system performance, use the IRQ polling API to schedule this processing on softirq context. This function will be disabled by default until starting values can be established for the hardware supported by this driver. Signed-off-by:
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Matthew R. Ochs authored
As further staging to support processing the HRRQ by other means, access to the HRRQ needs to be serialized by a disabled lock. This will allow safe access in other non-hardware interrupt contexts. In an effort to minimize the period where interrupts are disabled, support is added to queue up commands harvested from the RRQ such that they can be processed with hardware interrupts enabled. While this doesn't offer any improvement with processing on a hardware interrupt it will help when IRQ polling is supported and the command completions can execute on softirq context. Signed-off-by:
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Matthew R. Ochs authored
In order to support processing the HRRQ by other means (e.g. polling), the processing portion of the current RRQ interrupt handler needs to be broken out into a separate routine. This will allow RRQ processing from places other than the RRQ hardware interrupt handler. Signed-off-by:
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Colin Ian King authored
Trivial fix to spelling mistake in SNIC_ERR error message text, one cannot have "Cann't". Signed-off-by:
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- 12 Apr, 2017 13 commits
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Xiang Chen authored
For 1 bit ECC errors, those errors can be recovered by hw. But for multi-bits ECC and AXI errors, there are something wrong with whole module or system, so try reset the controller to recover those errors instead of calling panic(). Signed-off-by:
Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by:
John Garry <john.garry@huawei.com> Signed-off-by:
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John Garry authored
If a TMF timeouts (maybe due to unlikely scenario of an expander being unplugged when TMF for remote device is active), when we eventually try to free the slot, we crash as we dereference the slot's task, which has already been released. As a fix, add checks in the slot release code for a NULL task. Signed-off-by:
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John Garry authored
This patch is a workaround for a SoC bug where an internal abort command may timeout. In v2 hw, the channel should become idle in order to finish abort process. If the target side has been sending HOLD, host side channel failed to complete the frame to send, and can not enter the idle state. Then internal abort command will timeout. As this issue is only in v2 hw, we deal with it in the hw layer. Our workaround solution is: If abort is not finished within a certain period of time, we will check HOLD status. If HOLD has been sending, we will send break command. Signed-off-by:
Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by:
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Xiaofei Tan authored
This patch adds a workaround solution for a SoC bug which may cause SoC logic fatal error when disabling a PHY. Then we find internal abort IO timeout may occur, and the controller IO breakpoint may be corrupted. We work around this SoC bug by optimizing the flow of disabling a PHY. Signed-off-by:
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Xiaofei Tan authored
This patch provides a workaround a SoC bug where SATA IPTTs for different devices may conflict. The workaround solution requests the following: 1. SATA device id must be even and not equal to SAS IPTT. 2. SATA device can not share the same IPTT with other SAS or SATA device. Besides we shall consider IPTT value 0 is reserved for another SoC bug (STP device open link at firstly after SAS controller reset). To sum up, the solution is: Each SATA device uses independent and continuous 32 even IPTT from 64 to 4094, then v2 hw can only support 63 SATA devices. All SAS device(SSP/SMP devices) share odd IPTT value from 1 to 4095. Signed-off-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Xiaofei Tan authored
After resetting the controller, the process of scanning SATA disks attached to an expander may fail occasionally. The issue is that the controller can't close the STP link created by target if the max link time is 0. To workaround this issue, we reject STP link after resetting the controller, and change the corresponding PHY to accept STP link only after receiving data. We do this check in cq interrupt handler. In order not to reduce efficiency, we use an variable to control whether we should check and change PHY to accept STP link. The function phys_reject_stp_links_v2_hw() should be called after resetting the controller. The solution of another SoC bug "SATA IO timeout", that also uses the same register to control STP link, is not effective before the PHY accepts STP link. Signed-off-by:
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Johannes Thumshirn authored
Directly call ELS request handler functions in fc_lport_recv_els_req instead of saving the pointer to the handler's receive function and then later dereferencing this pointer. This makes the code a bit more obvious. Signed-off-by:
Chad Dupuis <chad.dupuis@cavium.com> Signed-off-by:
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Hannes Reinecke authored
sg_remove_sfp_usercontext() is clearing any sg requests, but needs to take 'rq_list_lock' when modifying the list. Reported-by:
Hannes Reinecke <hare@suse.com> Reviewed-by:
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Hannes Reinecke authored
'Sg_request' is using a private list implementation; convert it to standard lists. Signed-off-by:
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Johannes Thumshirn authored
Check for a valid direction before starting the request, otherwise we risk running into an assertion in the scsi midlayer checking for valid requests. [mkp: fixed typo] Signed-off-by:
Dmitry Vyukov <dvyukov@google.com> Signed-off-by:
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Hannes Reinecke authored
The 'reserved' page array is used as a short-cut for mapping data, saving us to allocate pages per request. However, the 'reserved' array is only capable of holding one request, so this patch introduces a mutex for protect 'sg_fd' against concurrent accesses. Signed-off-by:
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Hannes Reinecke authored
Unused. Signed-off-by:
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Hannes Reinecke authored
The ioctl SET_FORCE_LOW_DMA has never worked since the initial git check-in, and the respective setting is nowadays handled correctly. So disable it entirely. Signed-off-by:
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