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2017-06-19scsi: hisi_sas: add v3 code to send ATA frameXiang Chen1-0/+106
Add code to prepare ATA frame for v3 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>
2017-06-19scsi: hisi_sas: add v3 code to send SMP frameXiang Chen1-0/+74
Add code to prepare SMP frame. 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>
2017-06-19scsi: hisi_sas: add v3 code to send SSP frameXiang Chen1-0/+208
Add code to prepare SSP frame and deliver it to hardware. 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>
2017-06-19scsi: hisi_sas: add v3 cq interrupt handlerXiang Chen1-0/+340
Add v3 cq interrupt handler slot_complete_v3_hw(). Note: The slot error handling needs to be further refined in the future to examine all fields in the error record, and handle appropriately, instead of current solution - just report SAS_OPEN_REJECT. 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>
2017-06-19scsi: hisi_sas: add phy up/down/bcast and channel ISRXiang Chen1-0/+283
Add code to initialise interrupts and add some interrupt handlers. Also add function hisi_sas_v3_destroy_irqs() to clean-up irqs upon module unloading. 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>
2017-06-19scsi: hisi_sas: add v3 hw PHY initXiang Chen1-1/+126
Add code to configure PHYs for v3 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>
2017-06-19scsi: hisi_sas: add v3 hw initXiang Chen1-0/+277
Add code to initialise v3 hardware. 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>
2017-06-19scsi: hisi_sas: add initialisation for v3 pci-based controllerJohn Garry3-6/+172
Add the code to initialise the controller which is based on pci device in hisi_sas_v3_hw.c The core controller routines are still in hisi_sas_main.c; some common initialisation functions are also exported from hisi_sas_main.c For pci-based controller, the device properties, like phy count and sas address are read from the firmware, same as platform device-based controller. 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>
2017-06-19scsi: hisi_sas: add skeleton v3 hw driverJohn Garry3-1/+57
Add skeleton driver for v3 hw in hisi_sas_v3_hw.c File hisi_sas_v3_hw.c will serve 2 purposes: - probing and initialisation of the controller based on pci device - hw layer for v3-based controllers The controller design is quite similar to v2 hw in hip07. However key differences include: -All v2 hw bugs are fixed (hopefully), so workarounds are not required -support for device deregistration -some interrupt modifications -configurable max device support 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>
2017-06-19scsi: hisi_sas: create hisi_sas_get_fw_info()John Garry2-37/+71
Move the functionality to retrieve the fw info into a dedicated device type-agnostic function, hisi_sas_get_fw_info(). The reasoning is that this function will be required for future pci-based platforms. Also add some debug logs for failure. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-19scsi: hisi_sas: add pci_dev in hisi_hba structJohn Garry4-55/+59
Since hip08 SAS controller is based on pci device, add hisi_hba.pci_dev for hip08 (will be v3), and also rename hisi_hba.pdev to .platform_dev for clarity. In addition, for common code which wants to reference the controller device struct, add hisi_hba.dev, and change the common code to use it. 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>
2017-06-19scsi: hisi_sas: relocate get_ncq_tag_v2_hw()Xiang Chen3-15/+17
Relocate get_ncq_tag_v2_hw() to a common location, as future hw versions will require it. Also rename with "hisi_sas_" prefix for consistency. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-19scsi: hisi_sas: relocate sata_done_v2_hw()Xiang Chen3-16/+19
Relocate get_ata_protocol() to a common location, as future hw versions will require it. Also rename with "hisi_sas_" prefix for consistency. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-19scsi: hisi_sas: relocate get_ata_protocol()Xiang Chen3-65/+68
Relocate get_ata_protocol() to a common location, as future hw versions will require it. Also rename with "hisi_sas_" prefix for consistency. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-19scsi: hisi_sas: optimise the usage of hisi_hba.lockXiang Chen4-58/+77
Currently hisi_hba.lock is locked to deliver and receive a command to/from any hw queue. This causes much contention at high data-rates. To boost performance, lock on a per queue basis for sending and receiving commands to/from hw. Certain critical regions still need to be locked in the delivery and completion stages with hisi_hba.lock. New element hisi_sas_device.dq is added to store the delivery queue for a device, so it does not need to be needlessly re-calculated for every task. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-19scsi: hisi_sas: define hisi_sas_device.device_id as intJohn Garry2-9/+9
Currently hisi_sas_device.device_id is a u64. This can create a problem in selecting the queue for a device, in that this code does a 64b division on device id. For some 32b systems, 64b division is slow and the lib reference must be explicitly included. The device id does not need to be 64b in size, so, as a solution, just make as an int. Also, struct hisi_sas_device elements are re-ordered to improve packing efficiency. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-19scsi: hisi_sas: fix timeout check in hisi_sas_internal_task_abort()Xiang Chen1-8/+17
We need to check for timeout before task status, or the task will be mistook as completed internal abort command. Also add protection for sas_task.task_state_flags in hisi_sas_tmf_timedout(). Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-12scsi: hisi_sas: add null check before indirect pointer dereferenceGustavo A. R. Silva1-1/+1
Add null check before indirectly dereferencing pointer task->lldd_task in statement u32 tag = slot->idx; Addresses-Coverity-ID: 1373843 Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Reviewed-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-21scsi: sas: move scsi_remove_host call into sas_remove_hostJohannes Thumshirn1-1/+0
Move scsi_remove_host call into sas_remove_host and remove it from SAS HBA drivers, so we don't mess up the ordering. This solves an issue with double deleting sysfs entries that was introduced by the change of sysfs behaviour from commit bcdde7e221a8 ("sysfs: make __sysfs_remove_dir() recursive"). [mkp: addressed checkpatch complaints] Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Suggested-by: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: James Bottomley <jejb@linux.vnet.ibm.com> Cc: Jinpu Wang <jinpu.wang@profitbricks.com> Cc: John Garry <john.garry@huawei.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jinpu Wang <jinpu.wang@profitbricks.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-11scsi: hisi_sas: controller reset for multi-bits ECC and AXI fatal errorsXiang Chen1-37/+56
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: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-11scsi: hisi_sas: fix NULL deference when TMF timeoutsJohn Garry1-27/+33
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: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-11scsi: hisi_sas: add v2 hw internal abort timeout workaroundJohn Garry3-10/+55
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: John Garry <john.garry@huawei.com> Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-11scsi: hisi_sas: workaround SoC about abort timeout bugXiaofei Tan1-1/+126
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: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-11scsi: hisi_sas: workaround a SoC SATA IO processing bugXiaofei Tan2-13/+72
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: Xiaofei Tan <tanxiaofei@huawei.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>
2017-04-11scsi: hisi_sas: workaround STP link SoC bugXiaofei Tan2-1/+60
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: Xiaofei Tan <tanxiaofei@huawei.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>
2017-03-29scsi: hisi_sas: fix SATA dependencyArnd Bergmann1-1/+2
Removing the 'select SCSI_SAS_LIBSAS' statement in Kconfig resulted in a link failure in configurations that have hisi_sas built-in but libsas as a loadable module: drivers/scsi/built-in.o: In function `hisi_sas_scan_finished': hisi_sas_main.c:(.text+0x37ce9): undefined reference to `sas_drain_work' drivers/scsi/built-in.o: In function `hisi_sas_slave_configure': hisi_sas_main.c:(.text+0x37d17): undefined reference to `sas_slave_configure' hisi_sas_main.c:(.text+0x37d40): undefined reference to `sas_change_queue_depth' drivers/scsi/built-in.o: In function `hisi_sas_remove': All other libsas users have the 'select' statement, so we should do the same here for consistency. For all I can tell, the patch that added the sata softreset does not actually introduce a dependency on SCSI_SAS_ATA but instead adds calls into libata itself, so we can express that with a more specific dependency. We cannot have 'select SCSI_SAS_LIBSAS; depends on SCSI_SAS_ATA' as that would cause a dependency loop. Fixes: 7c594f0407de ("scsi: hisi_sas: add softreset function for SATA disk") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-29scsi: hisi_sas: add missing break in switch statementColin Ian King1-0/+1
It appears that a break in the TRANS_TX_OPEN_CNX_ERR_NO_DESTINATION case got accidentally removed in an earlier commit, as it stands, the ts->stat and ts->open_rej_reason are being updated twice for this case which looks incorrect. Fix this by adding in the missing break statement. Detected by CoverityScan, CID#1422110 ("Missing break in switch") Fixes: 634a9585f49c7 ("scsi: hisi_sas: process error codes according to their priority") Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: add is_sata_phy_v2_hw()Xiaofei Tan1-4/+13
Add helper function is_sata_phy_v2_hw() to judge whether the attached device is SATA disk for a root PHY. Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: use dev_is_sata to identify SATA or SAS diskXiang Chen1-1/+1
When SMP IO is sent, sas_protocol_ata couldn't judge whether the disk is SATA or SAS disk. So use dev_is_sata to identify SATA or SAS disk. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: check hisi_sas_lu_reset() error messageJohn Garry1-2/+3
Unless we actually get some sort of failure in hisi_sas_lu_reset(), don't print a message. 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>
2017-03-23scsi: hisi_sas: release SMP slot in lldd_abort_taskXiang Chen1-2/+7
When an SMP task timeouts, it will call lldd_abort_task to release the associated slot, and then will release the sas_task. Currently in lldd_abort_task, if we fail to internally abort IO, then the slot of SMP IO is not released, but sas_task will still be later released, so the slot's sas_task is NULL, which will cause NULL pointer when hisi_sas_slot_task_free happens later. To resolve, check the return value of internal abort, and release the slot if it failed. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: add hisi_sas_clear_nexus_ha()John Garry1-0/+8
Add function for upper-layer to reset controller when all else fails. 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>
2017-03-23scsi: hisi_sas: rename hisi_sas_link_timeout_{enable, disable}_linkJohn Garry1-6/+6
For consistency, remove the "hisi_sas_" prefix. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: handle PHY UP+DOWN simultaneous irqXiaofei Tan1-17/+39
Handle the situation that PHY UP and DOWN irq happen simultaneously. There is no mechanism of SoC HW to ensure this situation will never happen. So, we add this handle just in case. Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: some modifications to v2 hw reg init valuesJohn Garry1-6/+6
This patch includes: (1) Disable transport layer retry (2) Support CQ time and count interrupt coal (3) fix link FIFO full issue Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: Zhao Nenglong <zhaonenglong@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: process error codes according to their priorityXiang Chen1-155/+398
There are some rules to decide which error code has the high priority when errors happen together: (1) Error phase of CQ decides the error happens on RX or TX; (2) For TX error, when DMA/TRANS TX error happen simultaneously, the priority of DMA TX error is higher than TRANS TX error, so for the priority of TX error: DW2 (DMA TX part) > DW0; (3) For RX error, when TRANS/DMA/SIPC RX error happen simultaneously, the priority of TRANS RX error is higher than DMA and SIPC RX error, and we should also keep the rules (the priority of DW3 > DW2), so for the priority of RX error: DW1 > DW3 > DW2(SIPC RX part); (4) There are also a priority we should keep in the same error type. So, modify slot error code to handle this. In addition to this, some some error codes are modified according to recommendation from SoC designer. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: remove task free'ing for timeoutsJohn Garry1-14/+1
When a TMF or internal abort times-out, do not free slot. We expect this to be done upon later escalated error handling. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: fix some sas_task.task_state_lock lockingJohn Garry3-9/+14
Some more locking needs to be added/modified for when read-modify-writing sas_task.task_state_flags. Note: since we can attempt to grab this lock in interrupt context we should use irq variant of spin_lock. 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>
2017-03-23scsi: hisi_sas: free slots after hardresetXiang Chen1-5/+6
After hardreset, we clear up IOs of remote disks, so we need to free those slots in LLDD. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: check for SAS_TASK_STATE_ABORTED in slot completeJohn Garry1-0/+10
Check in slot_complete_v2_hw() for whether a task has already been completed by upper layer. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: hardreset for SATA disk in LU resetJohn Garry1-9/+29
When issuing an LU reset for a SATA target, issue an internal abort and a hard reset. 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>
2017-03-23scsi: hisi_sas: modify hisi_sas_abort_task() for SSPJohn Garry2-11/+19
Currently an internal abort is executed regardless of the result of the TMF. We should also check the result of the internal abort to see if we should free the slot. So change the status code STAT_IO_COMPLETE to TMF_RESP_FUNC_SUCC, meaning the slot has been successfully aborted. 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>
2017-03-23scsi: hisi_sas: modify error handling for v2 hwXiang Chen1-6/+3
For error codes which need abort-and-retry, simulate IO timeout and let SCSI+ATA layers process those errors. Previously for SSP, we should try to abort the IO in the LLDD and then pass back to upper layer, but sometimes this would also error. So Instead of adding special error handling for this scenario in the LLDD, allow the upper layer to handle completely. No performance hit is seen by taking this approach. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: only reset link for PHY_FUNC_LINK_RESETJohn Garry1-1/+2
We currently do a hard reset for a link reset. Change this to do a link reset only. Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Xiang Chen <chenxiang@hisilicon.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: error hisi_sas_task_prep() when port downJohn Garry1-3/+2
When sas_port is NULL, then return SAS_PHY_DOWN. In addition, when the sas_dev is gone then explicitly return SAS_PHY_DOWN. 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>
2017-03-23scsi: hisi_sas: remove hisi_sas_port_deformed()John Garry4-65/+46
Currently when a root PHY is deformed from a asd_sas_port we try to release the slots in the LLDD, and fail. Regardless, it is not right to release this early. This patch removes the deformed function. As it was before, port deformation is still done in hisi_sas_phy_down(). It would be nice to actually remove the hisi_sas_port_{de}formed() pair, however we cannot as we need to know the asd_sas_port index libsas has associated with an asd_sas_phy. The hw does actually generate a port id for a PHY, but this seems to a random number, so ignored for this purpose. This patch also changes the code to link slots to the hisi_sas_device, and not hisi_sas_port. 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>
2017-03-23scsi: hisi_sas: add softreset function for SATA diskXiang Chen3-6/+69
Add softreset to clear IO after internal abort device for SATA disk. The SATA error handling for the controller is based on device internal abort and softreset function. The controller does not support internal abort for single IO, so we need to execute internal abort for device. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: move PHY init to hisi_sas_scan_start()John Garry4-11/+6
Relocate the PHY init code from LLDD hw init path to hisi_sas_scan_start(). 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>
2017-03-23scsi: hisi_sas: add controller resetXiang Chen3-8/+227
There are some scenarios that we need to warm-reset to reset registers of SAS controller. During reset we disable interrupts/DQs/PHYs, and after reset we re-init the hardware and rescan the topology to see if anything changed. Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-23scsi: hisi_sas: add to_hisi_sas_port()John Garry4-7/+22
Introduce function to get hisi_sas_port from asd_sas_port. 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>
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