- 26 Jun, 2018 6 commits
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Mike Christie authored
Just return EBUSY if a nl request comes in while processing one. The upper layers do not support sending multiple create/remove requests at the same time (you cannot have a create and remove at the same time or do multiple creates or removes at the same time) and doing a reconfig while a create/remove is still executing does not make sense. Signed-off-by:
Mike Christie <mchristi@redhat.com> Tested-by:
Xiubo Li <xiubli@redhat.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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Mike Christie authored
The next patch is going to fix the hung nl command issue so this adds a list of outstanding nl commands that we can later abort when the daemon is restarted. Signed-off-by:
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Mike Christie authored
When this code changed, this was never cleaned up. Signed-off-by:
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Arnd Bergmann authored
The get_seconds() function suffers from a possible overflow in 2038 or 2106, as well as jitter due to settimeofday or leap second updates, and is deprecated. As we are interested in elapsed time only, using ktime_get_seconds() to read the CLOCK_MONOTONIC timebase is ideal here. This also lets us remove the hack that tries to deal with get_seconds() going slightly backwards, which cannot happen with montonic timestamps. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Reviewed-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Arnd Bergmann authored
The get_seconds() helper returns an 'unsigned long' value, which can overflow on 32-bit architectures. Since the interface we pass it into already uses a 64-bit type, we can just use ktime_get_real_seconds() instead. While we generally prefer local timestamps in CLOCK_MONOTONIC format (ktime_get_seconds), this keeps using the CLOCK_REALTIME version in order to maintain compatibility with existing code. Signed-off-by:
Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Reviewed-by:
James Smart <james.smart@broadcom.com> Signed-off-by:
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Arnd Bergmann authored
get_seconds() can overflow on 32-bit architectures and is deprecated because of that. The use in the aacraid driver has the same problem due to a limited firmware interface, it also overflows in the year 2106. This changes all calls to get_seconds() to the non-deprecated ktime_get_real_seconds(), which unfortunately doesn't solve that problem but gets rid of one user of the deprecated interface. [mkp: checkpatch] Signed-off-by:
Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com> Signed-off-by:
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- 22 Jun, 2018 1 commit
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Souptick Joarder authored
Use new return type vm_fault_t for fault handler. For now, this is just documenting that the function returns a VM_FAULT value rather than an errno. Once all instances are converted, vm_fault_t will become a distinct type. Ref-> commit 1c8f4220 ("mm: change return type to vm_fault_t") Previously, VM_FAULT_NOPAGE was returned without verifying return value of vm_insert_pfn. The new inline vmf_insert_pfn() will address this issue by returning correct VM_FAULT_* type from fault handler. Signed-off-by:
Souptick Joarder <jrdr.linux@gmail.com> Acked-by:
Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by:
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- 20 Jun, 2018 33 commits
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Don Brace authored
Reviewed-by:
Scott Benesh <scott.benesh@microsemi.com> Signed-off-by:
Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by:
Don Brace <don.brace@microsemi.com> Signed-off-by:
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Kevin Barnett authored
Use the readl() kernel function to read all index registers. For ARM systems, this function includes a read memory barrier that eliminates ci/pi corruption. Reviewed-by:
Scott Teel <scott.teel@microsemi.com> Tested-by:
Shunyong Yang <shunyong.yang@hxt-semitech.com> Signed-off-by:
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Kevin Barnett authored
Add support for these new device IDs: Advantech MIC-8312BridgeB INSPUR PM8204-2GB INSPUR PM8204-4GB INSPUR PM8222-SHBA Reviewed-by:
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Kevin Barnett authored
Detect rare error cases for synchronous requests down the RAID path. Also retry INQUIRY of VPD page 0 sent to an HBA drive if the command failed due to an abort. Reviewed-by:
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Kevin Barnett authored
Decrement the active thread count after the synchronous request was submitted to the controller but before the driver blocks to wait for the request to complete. Reviewed-by:
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Bart Van Assche authored
Avoids that warnings about the kernel headers appear when building with W=1. Remove useless "@Returns - Nothing" clauses. Change "@Return - " into "Return: ". Signed-off-by:
Bart Van Assche <bart.vanassche@wdc.com> Cc: Sathya Prakash <sathya.prakash@broadcom.com> Cc: Chaitra P B <chaitra.basappa@broadcom.com> Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
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Bart Van Assche authored
scsi: mpt3sas: Split _base_reset_handler(), mpt3sas_scsih_reset_handler() and mpt3sas_ctl_reset_handler() Split each of these functions in three functions - one function per reset phase. This patch does not change any functionality but makes the code easier to read. Note: it is much easier to review the git diff -w output after having applied this patch than by reviewing the patch itself. Signed-off-by:
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Bart Van Assche authored
Since ioc->shost_recovery is set after ioc->reset_in_progress_mutex is obtained, if concurrent resets are issued there is a short time during which ioc->reset_in_progress_mutex is locked and ioc->shost_recovery == 0. Avoid that this can cause trouble by unconditionally locking ioc->shost_recovery. Signed-off-by:
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Bart Van Assche authored
This patch avoids that smatch complains about a double unlock on ioc->transport_cmds.mutex. Fixes: 651a0136 ("scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough") Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Bart Van Assche authored
Make _base_build_nvme_prp() easier to read by introducing a structure to access NVMe command fields. Signed-off-by:
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Bart Van Assche authored
This patch avoids that gcc complains about switch/case fall-through when building with W=1. Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
Modify the indentation such that smatch no longer complains about inconsistent indenting. Signed-off-by:
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Jason Yan authored
Commit 2623c7a5 ("libata: add refcounting to ata_host") v4.17+ introduced refcounting to ata_host and will increase or decrease the refcount when adding or deleting transport ATA port. Now the ata host for libsas is embedded in domain_device, and the ->kref member is not initialized. Afer we add ata transport class, ata_host_get() will be called when adding transport ATA port and a warning will be triggered as below: refcount_t: increment on 0; use-after-free. WARNING: CPU: 2 PID: 103 at lib/refcount.c:153 refcount_inc+0x40/0x48 ...... Call trace: refcount_inc+0x40/0x48 ata_host_get+0x10/0x18 ata_tport_add+0x40/0x120 ata_sas_tport_add+0xc/0x14 sas_ata_init+0x7c/0xc8 sas_discover_domain+0x380/0x53c process_one_work+0x12c/0x288 worker_thread+0x58/0x3f0 kthread+0xfc/0x128 ret_from_fork+0x10/0x18 And also when removing transport ATA port ata_host_put() will be called and another similar warning will be triggered. If the refcount decreased to zero, the ata host will be freed. But this ata host is only part of domain_device, it cannot be freed directly. So we have to change this embedded static ata host to a dynamically allocated ata host and initialize the ->kref member. To use ata_host_get() and ata_host_put() in libsas, we need to move the declaration of these functions to the public libata.h and export them. Fixes: b6240a4d ("scsi: libsas: add transport class for ATA devices") Signed-off-by:
Jason Yan <yanaijie@huawei.com> CC: John Garry <john.garry@huawei.com> CC: Taras Kondratiuk <takondra@cisco.com> CC: Tejun Heo <tj@kernel.org> Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Matthew Wilcox authored
With its one user gone, remove the library code. Signed-off-by:
Matthew Wilcox <willy@infradead.org> Reviewed-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Matthew Wilcox authored
The sbitmap and the percpu_ida perform essentially the same task, allocating tags for commands. The sbitmap outperforms the percpu_ida as documented here: https://lkml.org/lkml/2014/4/22/553 The sbitmap interface is a little harder to use, but being able to remove the percpu_ida code and getting better performance justifies the additional complexity. Signed-off-by:
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Matthew Wilcox authored
Introduce target_free_tag() and convert all drivers to use it. Signed-off-by:
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Tomas Winkler authored
ufshcd_dump_regs should use memcpy_fromio to read host registers instead of directly accessing using memcpy. The same function is utilized in ufs-qcom. Elminite compilation warning drivers/scsi/ufs/ufshcd.c:356:9: warning: incorrect type in argument 6 (different address spaces) drivers/scsi/ufs/ufshcd.c:356:9: expected void const *buf drivers/scsi/ufs/ufshcd.c:356:9: got void [noderef] <asn:2>*mmio_base Signed-off-by:
Tomas Winkler <tomas.winkler@intel.com> Reviewed-by:
Avri Altman <avri.altman@wdc.com> Signed-off-by:
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Jeff Moyer authored
commit a45b599a ("scsi: sg: allocate with __GFP_ZERO in sg_build_indirect()") changed the call to alloc_pages to always use __GFP_ZERO. Just above that, though, there was this: if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) gfp_mask |= __GFP_ZERO; And there's only one user of the gfp_mask. Just or in the __GFP_ZERO flag at the top of the function and be done with it. Signed-off-by:
Jeff Moyer <jmoyer@redhat.com> Acked-by:
Douglas Gilbert <dgilbert@interlog.com> Signed-off-by:
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Sebastian Andrzej Siewior authored
In commit d2ba5675 ("[SCSI] qla2xxx: Disable local-interrupts while polling for RISC status.") added a local_irq_disable() before invoking the ->intr_handler callback. The function, which was used in this callback, did not disable interrupts while acquiring the spin_lock so a deadlock was possible and this change was one possible solution. The function in question was qla2300_intr_handler() and is using spin_lock_irqsave() since commit 43fac4d9 ("[SCSI] qla2xxx: Resolve a performance issue in interrupt"). I checked all other ->intr_handler callbacks and all of them use the irqsave variant so it is safe to remove the local_irq_save() block now. Cc: qla2xxx-upstream@qlogic.com Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by:
Himanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by:
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Johannes Thumshirn authored
This will make subsequent refactoring easier to handle. Note: this patch is nowhere checkpatch clean. Signed-off-by:
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Zhouyang Jia authored
When ioremap_nocache fails, the lack of error-handling code may cause unexpected results. This patch adds error-handling code after calling ioremap_nocache. Signed-off-by:
Zhouyang Jia <jiazhouyang09@gmail.com> Reviewed-by:
Manish Rangankar <Manish.Rangankar@cavium.com> Signed-off-by:
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Sebastian Andrzej Siewior authored
Since commit 312d3e56 ("[SCSI] libsas: remove ata_port.lock management duties from lldds") the sas_ata_qc_issue() function unlocks the ata_port.lock and disables interrupts before doing so. That lock is always taken with disabled interrupts so at this point, the interrupts are already disabled. There is no need to disable the interrupts before the unlock operation because they are already disabled. Restoring the interrupt state later does not change anything because they were disabled and remain disabled. Therefore remove the operations which do not change the behaviour. Fixes: 312d3e56 ("[SCSI] libsas: remove ata_port.lock management duties from lldds") Signed-off-by:
Dan Williams <dan.j.williams@intel.com> Reviewed-by:
John Garry <john.garry@huawei.com> Signed-off-by:
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Wen Xiong authored
This patch adds formatting error overlay 0x41 to improve debug capabilities. Signed-off-by:
Wen Xiong <wenxiong@linux.vnet.ibm.com> Acked-by:
Brian King <brking@linux.vnet.ibm.com> Signed-off-by:
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John Garry authored
Update CFG_1US_TIMER_TRSH and CON_CFG_DRIVER settings. Signed-off-by:
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John Garry authored
The init is missed for hisi_sas_phy spinlock, so add it. Signed-off-by:
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Xiang Chen authored
Currently the driver spends much time allocating and freeing the slot DMA buffer for command delivery/completion. To boost the performance, pre-allocate the buffers for all IPTT. The downside of this approach is that we are reallocating all buffer memory upfront, so hog memory which we may not need. However, the current method - DMA buffer pool - also caches all buffers and does not free them until the pool is destroyed, so is not exactly efficient either. On top of this, since the slot DMA buffer is slightly bigger than a 4K page, we need to allocate 2x4K pages per buffer (for 4K page kernel), which is quite wasteful. For 64K page size this is not such an issue. So, for the 4K page case, in order to make memory usage more efficient, pre-allocating larger blocks of DMA memory for the buffers can be more efficient. To make DMA memory usage most efficient, we would choose a single contiguous DMA memory block, but this could use up all the DMA memory in the system (when CMA enabled and no IOMMU), or we may just not be able to allocate a DMA buffer large enough when no CMA or IOMMU. To decide the block size we use the LCM (least common multiple) of the buffer size and the page size. We roundup(64) to ensure the LCM is not too large, even though a little memory may be wasted per block. So, with this, the total memory requirement is about is about 17MB for 4096 max IPTT. Previously (for 4K pages case), it would be 32MB (for all slots allocated). With this change, the relative increase of IOPS for bs=4K read when PAGE_SIZE=4K and PAGE_SIZE=64K is as follows: IODEPTH 4K PAGE_SIZE 64K PAGE_SIZE 32 56% 47% 64 53% 44% 128 64% 43% 256 67% 45% Signed-off-by:Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by:
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Xiaofei Tan authored
In host reset, we use TMF or soft-reset to re-init device, and if success, we will release all LLDD resources of this device. If the init fails - maybe because the device was removed or link has not come up - then do not release the LLDD resources, but rather rely on SCSI EH to handle the timeout for these resources later on. But if clear nexus ha calls host reset, which is the last effort of SCSI EH, we should release all LLDD remain resources. Because SCSI EH will release all tasks after clear nexus ha. Before release, we do I_T nexus reset to try to clear target remain IOs. Signed-off-by:
Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by:
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Xiaofei Tan authored
During reset, we don't want PHY events reported to libsas for PHYs which were previously attached prior to reset. So check hisi_hba->flags for HISI_SAS_RESET_BIT to filter PHY events during reset. Signed-off-by:
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Xiaofei Tan authored
After soft_reset() for host reset, we should not be allowed to send commands to the HW before the PHYs have come up and the port ids have been refreshed. Prior to this point, any commands cannot be successfully completed. This exclusion is achieved by grabbing the host reset semaphore. Signed-off-by:
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Xiaofei Tan authored
There is a possible conflict when a device is removed and host reset occurs concurrently. The reason is that then the device is notified as gone, we try to clear the ITCT, which is notified via an interrupt. The dev gone function pends on this event with a completion, which is completed when the ITCT interrupt occurs. But host reset will disable all interrupts, the wait_for_completion() may wait indefinitely. This patch adds an semaphore to synchronise this two processes. The semaphore is taken by the host reset as the basis of synchronising. Signed-off-by:
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Xiaofei Tan authored
There are many BROADCAST primitives generated by the host. We are only interested in BROADCAST (CHANGE) primitives currently, so only process this. We have applied this processing for v2 hw before, and it is also needed for v3 hw. Signed-off-by:
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Xiang Chen authored
This patch replaces the usage of dma_alloc_coherent() with the managed version, dmam_alloc_coherent(), hereby reducing replicated code. Signed-off-by:
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