- 12 Jan, 2017 6 commits
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Uma Krishnan authored
When processing an AFU asynchronous interrupt, if the action results in an operation that requires off level processing (a link reset for example), the worker thread is scheduled. In the meantime a reset event (i.e.: EEH) could unmap the AFU to recover. This results in an Oops when the worker thread tries to access the AFU mapping. [c000000f17e03b90] d000000007cd5978 cxlflash_worker_thread+0x268/0x550 [c000000f17e03c40] c00000000011883c process_one_work+0x1dc/0x680 [c000000f17e03ce0] c000000000118e80 worker_thread+0x1a0/0x520 [c000000f17e03d80] c000000000126174 kthread+0xf4/0x100 [c000000f17e03e30] c00000000000a47c ret_from_kernel_thread+0x5c/0xe0 In an effort to avoid this, a mapcount was introduced in commit b45cdbaf ("cxlflash: Resolve oops in wait_port_offline") but due to the race condition described above, this solution is incomplete. In order to fully resolve this problem and to simplify things, this commit removes the mapcount solution. Instead, the scheduled worker thread is cancelled after interrupts have been disabled and prior to the mapping being freed. Fixes: b45cdbaf ("cxlflash: Resolve oops in wait_port_offline") Signed-off-by:
Uma Krishnan <ukrishn@linux.vnet.ibm.com> Acked-by:
Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
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Matthew R. Ochs authored
The usage of prints within the cxlflash driver is inconsistent. This hinders debug and makes the driver source and log output appear sloppy. The following cleanups help unify the prints within cxlflash: - move all prints to dev-* where possible - transition all hex prints to lowercase - standardize variable prints in debug output - derive pointers in a consistent manner - change int to bool where appropriate - remove superfluous data from prints and print statements that do not make sense Signed-off-by:
Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by:
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Matthew R. Ochs authored
The SISLite specification outlines a new queuing model to improve over the MMIO-based IOARRIN model that exists today. This new model uses a submission queue that exists in host memory and is shared with the device. Each entry in the queue is an IOARCB that describes a transfer request. When requests are submitted, IOARCBs ('current' position tracked in host software) are populated and the submission queue tail pointer is then updated via MMIO to make the device aware of the requests. Signed-off-by: -
Matthew R. Ochs authored
As staging for supporting hardware with different context reset registers but a similar reset procedure, refactor the existing context reset routine to move the reset logic to a common routine. This will allow hardware with a different reset register to leverage existing code. Signed-off-by:
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Subhash Jadavani authored
Colin Ian King reported that with commit 7ff5ab47 ("scsi: ufs: add tracing support") static analysis is reporting that we may have swapped arguments on calls to: trace_ufshcd_runtime_resume, trace_ufshcd_runtime_suspend, trace_ufshcd_system_suspend, trace_ufshcd_system_resume, and trace_ufshcd_init Where: hba->uic_link_state is passed to dev_state hba->curr_dev_pwr_mode is passed to link_state This wasn't intentional so it's a bug. This change fixed this bug. Reported-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
Subhash Jadavani <subhashj@codeaurora.org> Acked-by:
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Christoph Hellwig authored
And simplify the interrupt handler by splitting the INTx case that needs to deal with shared interrupts into a separate helper. [mkp: typo fixage] Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
Jim Gill <jgill@vmware.com> Signed-off-by:
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- 11 Jan, 2017 16 commits
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Sasikumar Chandrasekaran authored
Upgrade driver version. Signed-off-by:
Sasikumar Chandrasekaran <sasikumar.pc@broadcom.com> Reviewed-by:
Tomas Henzl <thenzl@redhat.com> Signed-off-by:
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Sasikumar Chandrasekaran authored
Update Linux driver to use new pdTargetId field for JBOD target ID Signed-off-by:
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Sasikumar Chandrasekaran authored
ldio outstanding variable needs to be decremented in io completion path for iMR dual queue depth Signed-off-by:
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Sasikumar Chandrasekaran authored
Large SEQ IO workload should sent as non fast path commands Signed-off-by:
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Sasikumar Chandrasekaran authored
The Megaraid driver has to support the SAS3.5 Generic Megaraid Controllers Firmware functionality. Signed-off-by:
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Sasikumar Chandrasekaran authored
SAS3.5 Generic Megaraid Controllers FW will support new dynamic RaidMap to have different sizes for different number of supported VDs. Signed-off-by:
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Sasikumar Chandrasekaran authored
To improve RAID 1/10 Write performance, OS drivers need to issue the required Write IOs as Fast Path IOs (after the appropriate checks allowing Fast Path to be used) to the appropriate physical drives (translated from the OS logical IO) and wait for all Write IOs to complete. Design: A write IO on RAID volume will be examined if it can be sent in Fast Path based on IO size and starting LBA and ending LBA falling on to a Physical Drive boundary. If the underlying RAID volume is a RAID 1/10, driver issues two fast path write IOs one for each corresponding physical drive after computing the corresponding start LBA for each physical drive. Both write IOs will have the same payload and are posted to HW such that replies land in the same reply queue. If there are no resources available for sending two IOs, driver will send the original IO from SCSI layer to RAID volume through the Firmware. Based on PCI bandwidth and write payload, every second this feature is enabled/disabled. When both IOs are completed by HW, the resources will be released and SCSI IO completion handler will be called. Signed-off-by:
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Sasikumar Chandrasekaran authored
Detect sequential Write IOs and pass the hint that it is part of sequential stream to help HBA Firmware do the Full Stripe Writes. For read IOs on certain RAID volumes like Read Ahead volumes,this will help driver to send it to Firmware even if the IOs can potentially be sent to hardware directly (called fast path) bypassing firmware. Design: 8 streams are maintained per RAID volume as per the combined firmware/driver design. When there is no stream detected the LRU stream is used for next potential stream and LRU/MRU map is updated to make this as MRU stream. Every time a stream is detected the MRU map is updated to make the current stream as MRU stream. Signed-off-by:
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Sasikumar Chandrasekaran authored
An UNMAP command on a PI formatted device will leave the Logical Block Application Tag and Logical Block Reference Tag as all F's (for those LBAs that are unmapped). To avoid IO errors if those LBAs are subsequently read before they are written with valid tag fields, the MPI SCSI IO requests need to set the EEDPFlags element EEDP Escape Mode field, Bits [7:6] appropriately. A value of 2 should be set to disable all PI checks if the Logical Block Application Tag is 0xFFFF for PI types 1 and 2. A value of 3 should be set to disable all PI checks if the Logical Block Application Tag is 0xFFFF and the Logical Block Reference Tag is 0xFFFFFFFF for PI type 3. Signed-off-by:
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Sasikumar Chandrasekaran authored
SAS3.5 Generic Megaraid based Controllers will have the support for 128 MSI-X vectors, resulting in the need to support 128 reply queues Signed-off-by:
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Sasikumar Chandrasekaran authored
This patch contains new pci device ids for SAS3.5 Generic Megaraid Controllers Signed-off-by:
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Hanjun Guo authored
commit f1bc1e4c ("ata: acpi: rework the ata acpi bind support") removed scsi_register_acpi_bus_type() and scsi_unregister_acpi_bus_type(), but forgot to remove them in the header file, do it now. Signed-off-by:
Hanjun Guo <hanjun.guo@linaro.org> Reviewed-by:
John Garry <john.garry@huawei.com> Reviewed-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Tomas Winkler authored
Pull device descriptor reading out of ufs quirk so it can be used also for other purposes. Revamp the fixup setup: 1. Rename ufs_device_info to ufs_dev_desc as very similar name ufs_dev_info is already in use. 2. Make the handlers static as they are not used out of the ufshdc.c file. [mkp: applied by hand] Signed-off-by:
Tomas Winkler <tomas.winkler@intel.com> Reviewed-by:
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Tomas Winkler authored
Reading big endian value from a buffer requires explicit cast. Fix sparse warning: drivers/scsi/ufs/ufshcd.c:4825:24: warning: cast to restricted __be16 Signed-off-by:
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Tomas Winkler authored
Unexport ufshcd_read_device_desc and ufshcd_read_string_desc there is no really possibility to calling them directly outside of UFS context. Signed-off-by:
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Tomas Winkler authored
Fix the following compilation warning: drivers/scsi/ufs/ufshcd.c:2076:5: warning: no previous prototype for ufshcd_query_descriptor_retry [-Wmissing-prototypes] Also do not export the function, it should not be used out of ufs context. Signed-off-by:
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- 10 Jan, 2017 6 commits
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Emese Revfy authored
This adds the missing __printf attribute which allows compile time format string checking (and will be used by the coming initify gcc plugin). Additionally, this fixes the warnings exposed by the attribute. Signed-off-by:
Emese Revfy <re.emese@gmail.com> [kees: split scsi/acpi, merged attr and fix, new commit messages] Signed-off-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
Hannes Reinecke <hare@suse.com> Signed-off-by:
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Christoph Hellwig authored
Just call the functions directly instead of obsfucating the call chain. This was in reply to a patch from Kees Cook to constify the function pointer struct bfa_fcs_mod_s, but it turns out there is no reason to have this indirection at all. Signed-off-by:
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Colin Ian King authored
Rename the vendor_indentifer and hba_indentifer fields to correct spelling. Signed-off-by:
Himanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by:
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Nicolas Iooss authored
msix_entries and qla82xx_msix_entries arrays are never modified in drivers/scsi/qla2xxx/qla_isr.c. Move their contents to read-only data. Signed-off-by:
Nicolas Iooss <nicolas.iooss_linux@m4x.org> Reviewed-by:
Bart Van Assche <bart.vanassche@sandisk.com> Acked-by:
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Nicolas Iooss authored
qla24xx_enable_msix() calls scnprintf() with a non-literal format string. This makes clang report -Wformat-security warnings when compiling this function: drivers/scsi/qla2xxx/qla_isr.c:3083:7: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security] msix_entries[i].name); ^~~~~~~~~~~~~~~~~~~~ drivers/scsi/qla2xxx/qla_isr.c:3083:7: note: treat the string as an argument to avoid this msix_entries[i].name); ^ "%s", drivers/scsi/qla2xxx/qla_isr.c:3119:7: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security] msix_entries[QLA_ATIO_VECTOR].name); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/scsi/qla2xxx/qla_isr.c:3119:7: note: treat the string as an argument to avoid this msix_entries[QLA_ATIO_VECTOR].name); ^ "%s", Even though msix_entries[...].name are initialized as literal strings with no % character and are never modified, introduce a "%s" format parameter in order to silence this -Wformat-security warning and make clang able to detect at compile time real bugs related to string formatting. [mkp: typo] Signed-off-by:
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- 06 Jan, 2017 1 commit
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James Smart authored
The lpfc 11.2.0.4 patch set deprecated, by removing, the lpfc_soft_wwn parameter support. This patch reinstates support, but adds a warning in the enablement of the feature that indicates Broadcom (Emulex) does not support the feature. Signed-off-by:
James Smart <james.smart@broadcom.com> Signed-off-by:
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- 05 Jan, 2017 11 commits
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John Garry authored
When we call hisi_sas_slot_task_free() we should grab the hisi_hba.lock, as hisi_sas_slot_task_free() accesses common hisi_hba elements. Function hisi_sas_slot_abort() is missing this, so add it. Signed-off-by:
Zhangfei Gao <zhangfei.gao@linaro.org> Tested-by:
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John Garry authored
There is a bug in the current driver in that certain hisi_hba and port structure elements which we access when servicing the CQ interrupt do not use thread-safe accesses; these include hisi_sas_port linked-list of active slots (hisi_sas_port.entry), bitmap of currently allocated IPTT (in hisi_hba.slot_index_tags), and completion queue read pointer. As a solution, lock these elements with the hisi_hba.lock. Signed-off-by:
Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by:
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John Garry authored
Currently the all the slot processing for the completion queue is done in ISR context. It is judged that the slot processing can take a long time, especially when a SATA NCQ completes (upto 32 slots). So, as a solution, defer the bulk of the ISR processing to tasklet context. Each CQ will have its down tasklet. Signed-off-by:
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Javier Martinez Canillas authored
If the driver is built as a module, autoload won't work because the module alias information is not filled. So user-space can't match the registered device with the corresponding module. Export the module alias information using the MODULE_DEVICE_TABLE() macro. Before this patch: $ modinfo drivers/scsi/ufs/ufs-qcom.ko | grep alias $ After this patch: $ modinfo drivers/scsi/ufs/ufs-qcom.ko | grep alias alias: of:N*T*Cqcom,ufshcC* alias: of:N*T*Cqcom,ufshc Signed-off-by:
Javier Martinez Canillas <javier@osg.samsung.com> Reviewed-by:
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Dolev Raviv authored
Errors such as UIC error, illegal OCS values, and others may require more information for debugging. Such information could be hibern8 events, events sequences, recoverable errors, error history, and more. This patch improves tracking of important errors and events in debug level to be enabled when debugging a such issues. It includes: * UIC error history * Successful hibern8 events * Successful command after hibern8 exit * Clk-freq info * Failed device command * Infrastructure for dumping host controller debug information Signed-off-by:
Dolev Raviv <draviv@codeaurora.org> Signed-off-by:
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Lee Susman authored
Use the ftrace infrastructure to conditionally trace ufs command events. New trace event is created, which samples the following ufs command data: - device name - optional identification string - task tag - doorbell register - number of transfer bytes - interrupt status register - request start LBA - command opcode Currently we only fully trace read(10) and write(10) commands. All other commands which pass through ufshcd_send_command() will be printed with "-1" in the lba and transfer_len fields. Usage: echo 1 > /sys/kernel/debug/tracing/events/ufs/enable cat /sys/kernel/debug/tracing/trace_pipe Signed-off-by:
Lee Susman <lsusman@codeaurora.org> Signed-off-by:
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subhashj@codeaurora.org authored
This patch adds the profiling support for some of the time critical operations like hibern8 enter/exit, clock gating & clock scaling. Reviewed-by:
Venkat Gopalakrishnan <venkatg@codeaurora.org> Signed-off-by:
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subhashj@codeaurora.org authored
Immediately after successful UFS link startup, UFS link power mode would be in PWM-G1, 1-lane, SLOW-AUTO mode. But currently we are doing few of the DME local/peer attributes access before setting the "hba->pwr_info" to default power mode. If we are doing link startup as part of error recovery then old power mode might be set to FAST mode and doing DME peer access (after link startup but before updating "hba->pwr_info" to default power mode) unintentionally tries to switch from FAST to FAST_AUTO mode (if UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE quirk is enabled). Above issue is fixed by setting the default power mode immediately after successful link startup. Reviewed-by:
Sahitya Tummala <stummala@codeaurora.org> Signed-off-by:
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subhashj@codeaurora.org authored
UFS device requires to perform bkops (back ground operations) periodically but host can control (via auto-bkops parameter of device) when device can perform bkops based on its performance requirements. In general, host would like to enable the device's auto-bkops only when it's not doing any regular data transfer but sometimes device may not behave properly if host keeps the auto-bkops disabled. This change adds the capability to let the device auto-bkops always enabled except suspend. Reviewed-by:
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subhashj@codeaurora.org authored
UFS device and link can be put in multiple different low power modes hence UFS driver supports multiple different low power modes. This change sets the default UFS power management level which should put the link hibernate state and device in sleep state. This default power management level gives good power savings with relatively less enter/exit latencies. Reviewed-by:
Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by:
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subhashj@codeaurora.org authored
This patch provides the sysfs attribute to choose the power management level for UFS runtime and system suspend. Reviewed-by:
Sujit Reddy Thumma <sthumma@codeaurora.org> Signed-off-by:
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