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2017-01-20scsi: hisi_sas: decrease running_req in hisi_sas_slot_task_free()Xiang Chen2-6/+4
There is an issue that hisi_sas_dev.running_req is not decremented properly for internal abort and TMF. To resolve, only decrease running_req in hisi_sas_slot_task_free() Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-20scsi: hisi_sas: fix probe ordering problemXiang Chen2-10/+6
There is a potential probe issue in how we trigger the hw initialisation. Although we use 1s timer to delay hw initialisation, there is still a potential that sas_register_ha() is not be finished before we start the PHY init from hw->hw_init(). To avoid this issue, initialise the hw after sas_register_ha() in the same probe context. Note: it is not necessary to use 1s timer now (modified v2 hw only). Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-20scsi: hisi_sas: downgrade internal abort exit printJohn Garry1-1/+1
Downgrade the exit print in hisi_sas_internal_task_abort() to dbg level, as info is not required. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-20scsi: hisi_sas: modify hard reset for directed-attached diskXiang Chen1-0/+10
Correctly set registers in v2 for root PHY hardreset for directly attached disk. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-20scsi: hisi_sas: downgrade refclk messageJohn Garry1-1/+1
The message to inform that the controller has no refclk is currently at warning level, which is unnecessary, so downgrade to debug. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-20scsi: hisi_sas: modify some values of ITCT tableXiang Chen1-4/+10
Set SMP connection timeout and continue AWT timer; Clear ITCT table when dev gone. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-20scsi: hisi_sas: workaround v2 hw SATA IO timeout issueXiang Chen1-1/+74
The v2 SAS controller needs more time to detect channel idle and send setup link request than SATA disk does, so it is difficult for the SAS controller to setup an STP link. Therefore it may cause some IO timeouts. We need to periodically configure the SAS controller so it doesn't receive STP setup requests from SATA disks for a while, so IO can be sent during this period. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-05scsi: hisi_sas: lock sensitive region in hisi_sas_slot_abort()John Garry1-0/+3
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: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-05scsi: hisi_sas: lock sensitive regions when servicing CQ interruptJohn Garry2-0/+4
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: John Garry <john.garry@huawei.com> Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-01-05scsi: hisi_sas: service v2 hw CQ ISR with taskletJohn Garry2-6/+19
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: John Garry <john.garry@huawei.com> Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-12-07scsi: hisi_sas: support deferred probe for v2 hwJohn Garry1-0/+12
In the hip06 and hip07 SoCs, the interrupt lines from the SAS controllers are connected to mbigen hw module [1]. The mbigen module is probed with module_init, and, as such, is not guaranteed to probe before the SAS driver. So we need to support deferred probe. We check for probe deferral in the hw layer probe, so we not probe into the main layer and allocate shost, memories, etc., to later learn that we need to defer the probe. [1] ./Documentation/devicetree/bindings/interrupt-controller/hisilicon,mbigen-v2.txt Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-12-05scsi: hisi_sas: fix free'ing in probe and removeXiaofei Tan1-9/+14
This patch addresses 4 problems in the module probe/remove: - When hisi_sas_shost_alloc() fails after we alloc shost memory, we should free shost memory before the function returns. - When hisi_sas_probe() fails after we alloc the HBA memories, we should also free the HBA memories. - We should free shost memory at the end of hisi_sas_remove(). - sha->core.shost is set twice, so remove extra set. Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Quentin Lambert <lambert.quentin@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-29scsi: hisi_sas: shift vs compare typosDan Carpenter1-6/+6
There are some typos where we intended "<<" but have "<". Seems likely to cause a bunch of problems. Fixes: d3b688d3c69d ("scsi: hisi_sas: add v2 hw support for ECC and AXI bus fatal error") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: add PHY set linkrate support for v1 and v2 hwXiang Chen4-2/+103
Add the function to set PHY min and max linkrate through sysfs interface. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: use atomic64_t for hisi_sas_device.running_reqJohn Garry4-9/+10
Sometimes the value of hisi_sas_device.running_req would go negative unless we have the check for running_req >= 0 before trying to decrement. This is because using running_req is not thread-safe. As such, the value for running_req may be actually incorrect, so use atomic64_t instead. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: check SATA FIS when directly attaching SATA deviceXiang Chen1-0/+10
Check ERR bit of status to decide whether there is something wrong with initial register-D2H FIS. If error exists, PHY reset the channel to restart OOB. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: modify some values in get_ata_protocol()Xiang Chen1-2/+12
Modify and add some SATA commands according to SATA protocol. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: delete repeated configuration in free_device_v2_hw()Xiang Chen1-2/+0
Delete repeated configuration items for hisi_sas_device() when we free a device. These items are now only set in hisi_sas_dev_gone(). Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: modify return value of hisi_sas_query_task()Xiang Chen1-0/+3
sas_scsi_find_task() only deals with return value TMF_RESP_FUNC_FAILED/TMF_RESP_FUNC_SUCC/TMF_RESP_FUNC_COMPLETE of query task. So for LLDD errors just return TMF_RESP_FUNC_FAILED. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: replace WARN_ON() with dev_warn() for internal abortXiang Chen1-1/+2
Replace WARN_ON() with dev_warn() print when internal abort fails. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: fix port form bug in hisi_sas_port_notify_formed()Xiang Chen1-1/+1
When we form a wideport, we should use hardware PHY port_id instead of sas_phy->id. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: only process broadcast change in phy_bcast_v2_hw()Xiang Chen1-1/+7
There are many BROADCAST primitives generated by the host. We are only interested in BROADCAST (CHANGE) primitives currently, so only process this. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: alloc queue id of slot according to device idXiang Chen4-41/+30
Currently slots are allocated from queues in a round-robin fashion. This causes a problem for internal commands in device mode. For this mode, we should ensure that the internal abort command is the last command seen in the host for that device. We can only ensure this when we place the internal abort command after the preceding commands for device that in the same queue, as there is no order in which the host will select a queue to execute the next command. This queue restriction makes supporting scsi mq more tricky in the future, but should not be a blocker. Note: Even though v1 hw does not support internal abort, the allocation method is chosen to be the same for consistency. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-25scsi: hisi_sas: add v2 hw support for ECC and AXI bus fatal errorXiang Chen1-5/+420
For ECC 1bit error, logic can recover it, so we only print a warning. For ECC multi-bit and AXI bus fatal error, we panic. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08scsi: hisi_sas: Add v2 hw support for different refclkJohn Garry3-1/+12
The hip06 D03 and hip07 D05 boards have different reference clock frequencies for the SAS controller. Register PHY_CTRL needs to be programmed differently according to this frequency, so add support for this. The default register setting in PHY_CTRL is for 50MHz, so only update this register when the refclk frequency is 66MHz. For ACPI we expect the _RST handler to set the correct value for PHY_CTRL (we're forced to take different approach for DT and ACPI as ACPI does not support fixed-clock device). Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08scsi: hisi_sas: Add device tree support for hip07John Garry1-0/+1
Chipset hip07 incorporates v2 hw. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: send three identify before phy upJohn Garry1-4/+16
When the v2 hw is attached with many disks through an expander, there may be OOB reset resulting in a PHY going down after the speed is negotiated (very low probability). This issue is resolved by modifying the link control registers to send three identify frames before the PHY is ready (according to 6.10.3.3.2 in SAS 3.0 spec) and close ready when the PHY is down. Signed-off-by: NengLong Zhao <zhaonenglong@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: add missing SATA pending device type to v2 hwJohn Garry1-0/+1
In setup_itct_v2_hw(), SATA device type SAS_SATA_PENDING is missing, so add it. Note: The HiSi SAS controller does not support SATA PM, so do not handle SAS_SATA_PM_PORT or SAS_SATA_PM. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: remove init_id_frame_v1_hw()John Garry1-10/+0
Function config_id_frame_v1_hw() is called twice for each PHY during initialisation, which is unneeded. So remove init_id_frame_v1_hw(), which only calls config_id_frame_v1_hw(). We will keep the call to config_id_frame_v1_hw() in start_phy_v1_hw() since it will be used for PHY reset functions. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: remove init_id_frame_v2_hw()John Garry1-10/+0
Function config_id_frame_v2_hw() is called twice for each PHY during initialisation, which is unneeded. So remove init_id_frame_v2_hw(), which only calls config_id_frame_v2_hw(). We will keep the call to config_id_frame_v2_hw() in start_phy_v2_hw() since it will be used for PHY reset functions. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: fix HBA SAS addr endianness for v1 hwJohn Garry1-4/+4
The endianness for the SAS address in the TX_ID_DWORD registers is set incorrectly. We see errors like this in the boot log for v2 hw (which would have the same issue as v1 hw): [ 7.583284] sas: target proto 0x0 at 50000d1108e7923f:0x1f not handled This is due to the host SAS addr not matching the PHY SAS addr in the expander host-attached phy discovery responses. To fix, we byte swap the SAS addr from BE to LE (which is the endianness of the SAS controller). Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: fix HBA SAS addr endianness for v2 hwJohn Garry1-4/+4
The endianness for the SAS address in the TX_ID_DWORD registers is set incorrectly. We see errors like this in the boot log: [ 7.583284] sas: target proto 0x0 at 50000d1108e7923f:0x1f not handled This is due to the host SAS addr not matching the PHY SAS addr in the expander host-attached phy discovery responses. To fix, we byte swap the SAS addr from BE to LE (which is the endianness of the SAS controller). Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: set dma mask before allocate DMA memoryJohn Garry1-7/+6
The device DMA mask was being set after the bulk of the DMA allocations in the driver init, so potentially DMA allocates fail. To resolve, relocate before allocating the DMA memory when initialising the driver. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: fix a potential warning for sata disk ejectionJohn Garry1-20/+6
If hisi_sas_task_prep() fails for a SATA device due to PHY down, we return a failure to libata and also call task_done(), which will cause ata_qc_complete() to be called twice: - first call from hisi_sas_task_prep(), which will clear flag ATA_QCFLAG_ACTIVE - ata_qc_complete() called from libata The warning call trace is as follows: [ 117.070206] [<ffff0000084f59b0>] __ata_qc_complete+0xf4/0x11c [ 117.070208] [<ffff0000084f5b58>] ata_qc_complete+0x180/0x200 [ 117.070210] [<ffff0000084f5dd0>] ata_qc_issue+0x110/0x354 [ 117.070212] [<ffff0000084f6254>] ata_exec_internal_sg+0x240/0x4d0 [ 117.070214] [<ffff0000084f6544>] ata_exec_internal+0x60/0xa0 [ 117.070217] [<ffff000008501580>] ata_read_log_page+0x188/0x1b4 [ 117.070218] [<ffff0000085017dc>] ata_eh_analyze_ncq_error+0xa8/0x274 [ 117.070220] [<ffff000008501a3c>] ata_eh_link_autopsy+0x94/0x8c8 [ 117.070222] [<ffff0000085022a4>] ata_eh_autopsy+0x34/0xe8 [ 117.070223] [<ffff00000850540c>] ata_do_eh+0x28/0xc0 [ 117.070225] [<ffff0000085054e0>] ata_std_error_handler+0x3c/0x84 [ 117.070227] [<ffff000008505140>] ata_scsi_port_error_handler+0x480/0x674 [ 117.070230] [<ffff0000084e3020>] async_sas_ata_eh+0x44/0x78 [ 117.070231] [<ffff0000080d6b8c>] async_run_entry_fn+0x40/0x104 [ 117.070234] [<ffff0000080ce518>] process_one_work+0x128/0x2f0 [ 117.070235] [<ffff0000080ce738>] worker_thread+0x58/0x434 [ 117.070237] [<ffff0000080d416c>] kthread+0xd4/0xe8 [ 117.070240] [<ffff000008084e10>] ret_from_fork+0x10/0x40 The issue is resolved by simply returning a failure status code to the upper layer. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: fix phy8 linkrate calculation in phy_up_v2_hw()John Garry1-3/+0
In function phy_up_v2_hw(), we needlessly recalculate the phy linkrate for all phys, and the calculation is incorrect for phy8, so remove this code. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: disable dlvry queues once at reset for v2 hwJohn Garry1-3/+1
The Delivery queue enable register should only be written to once at reset for v2 hw. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: use safe BITS_PER_BYTE for slot tag size calculationJohn Garry1-1/+1
The memory calculation for the tags bitmap should use BITS_PER_BYTE macro instead of coincidental same value of sizeof(unsigned long). Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: only zero slot memory when reusedJohn Garry1-1/+1
Currently the slot memory is zeroed when it is freed and also when it is reused, like in hisi_sas_task_prep(). Optimise by avoiding the redundant zeroing in the free. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: keep CHL_INT2 masked for v2 HWJohn Garry1-6/+0
None of the CHL_INT2 interrupts are serviced in the channel irq ISR, so leave the interrupt source masked. The interrupt mask is initially set in init_reg_v2_hw(). Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: save delivery queue write pointerJohn Garry4-8/+25
Optimise by saving an avoidable read in the get_free_slot function. The delivery queue write pointer will only be updated by software, so don't bother re-reading what was already written in the previous call to start_delivery function. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-09-14scsi: hisi_sas: save completion queue read pointerJohn Garry3-7/+5
Optimise by saving an avoidable read in the cq interrupt. The queue read pointer will only be updated by software, so don't bother re-reading what was already written in the previous interrupt. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-25scsi: hisi_sas: update version to 1.6John Garry1-1/+1
Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-25scsi: hisi_sas: add TMF success checkJohn Garry1-0/+6
When a tmf is issued, various response codes can be returned from the target. For a query tmf the response may be TMF_RESP_FUNC_COMPLETE or TMF_RESP_FUNC_SUCC. Add a condition for TMF_RESP_FUNC_SUCC to hisi_sas_exec_internal_tmf_task(). This affects query tmf, as the result is success the returned value was for failure. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-25scsi: hisi_sas: fail tmf task prep when port detachedJohn Garry1-1/+1
When the port is detached we cannot execute a TMF, as there can be no device attached to the port. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-25scsi: hisi_sas: add v2 hw slot complete internal abort supportJohn Garry1-0/+31
Add code in slot_complete_v2_hw() to deal with the slots which have completed due to internal abort. The status codes have the following meaning: - STAT_IO_ABORTED: the IO has been aborted due to internal abort, whether by device or individual abort command - STAT_IO_COMPLETE: internal abort command has completed successfully for device or individual abort command - STAT_IO_NO_DEVICE: internal abort command has completed for device but cannot find any IO - STAT_IO_NOT_VALID: internal abort command has completed for single command but could not find the command Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-25scsi: hisi_sas: add prep_abort_v2_hw()John Garry1-0/+33
Add function to prepare the an internal abort for v2 hw. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-25scsi: hisi_sas: add internal abort to hisi_sas_abort_task()John Garry1-6/+10
Execute an internal abort for executing a task abort. This is for case of the command still being present in host when abort is executed. For a SATA internal abort, we set abort for all tasks associated with the device. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-25scsi: hisi_sas: add internal abort in hisi_sas_dev_gone()John Garry1-0/+3
Execute an internal abort for that device when it is removed, so that commands for that device are not processed. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-08-25scsi: hisi_sas: add internal abort main codeJohn Garry2-0/+171
Add main code for internal abort functionality. The internal abort features allows the host controller to abort commands which are still active in the controller but have not yet been sent to the slave device. Typically a command only spends a relatively short time in the controller when compared to the amount of the time after it is sent to the slave device. Two modes of internal abort are supported: - device - individual command For device, when the internal abort is issued all commands in the host for that device are aborted. For a single command, only that command is aborted if it is still in the host. In HW the internal abort command is executed similar to any other sort of command, like SSP. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-07-12hisi_sas: update driver version to 1.5John Garry1-1/+1
Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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