Add code to prepare internal abort command.
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>
Add code to itct setup and free 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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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 bcdde7e221 ("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>
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>
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>
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>
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>
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>
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>
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: 7c594f0407 ("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>
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: 634a9585f4 ("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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
There are some typos where we intended "<<" but have "<". Seems likely
to cause a bunch of problems.
Fixes: d3b688d3c6 ("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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
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>
Add support in v2 hw driver for ACPI.
A check on whether an ACPI handle is available for the device is used to
decide on whether to use ACPI reset handler or syscon for hw reset.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Define the NCQ NON DATA command and update libsas to handle it
correctly.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Add custom version of function to allocate device,
alloc_dev_quirk_v2_hw(). For sata devices the device id bit0 should be
0.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add v2 hw custom function slot_index_alloc_quirk_v2_hw(). SAS devices
should have IPTT bit0 equal to 1.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add methods to use HW specific versions of functions to allocate slot
and device. HW specific methods are permitted to workaround device id
vs IPTT collision issue in v2 hw.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.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>
This patch fixes the ITCT table setup as it should be configured
differently for SAS and SATA devices. For SATA disks there is no need
to set qw2 (already zeroed). Also, link parameters for Bus inactive
limit, max connection time limit, and reject to open limit timers
parameters are changed to match global config register,
MAX_CON_TIME_LIMIT_TIME, as recommended by hw team.
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>
This patch adds support for directly attaching SATA disks to phy
4-8. The problem was that only registers concerned with phy 0-3 were
being considered in sata_int_v2_hw(). The issue was not detected
previously as the development board only exposed phy 0-3; the new board
provides access to 8 phys.
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>
Intermittently it is found that when multiple SATA disks are directly
connected to the host that some disks are not detected. The problem is
that all set bitfields in ENT_INT_SRC1 are cleared for all phys in
sata_int_v2_hw() - it should clear the set bit for the phy being
serviced.
Also unnecessary double-write to ENT_INT_SRC1 and ENT_INT_SRC_MSK1 is
removed (remaining writes are done at end label).
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>
Contrary to the field name, the MCR (max connection rate) in the ITCT
should hold the device linkrate (linkrate of the connected phy), and not
the max linkrate.
This fixes an issue seen where some SATA drives connected through an
expander which would not attach.
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>
Rename SCSI_MAX_SG_SEGMENTS to SG_CHUNK_SIZE, which means the amount
we fit into a single scatterlist chunk.
Rename SCSI_MAX_SG_CHAIN_SEGMENTS to SG_MAX_SEGMENTS.
Will move these 2 generic definitions to scatterlist.h later.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Bart Van Assche <bart.vanassche@sandisk.com> (for ib_srp changes)
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
In high-datarate aging tests, it is found that the
SCSI framework can periodically issue lu resets as
some commands timeout.
Response TASK SET FULL and SAS_QUEUE_FULL may be
returned many times for the same command, causing the
timeouts.
The SAS_QUEUE_FULL errors come from
TRANS_TX_CREDIT_TIMEOUT_ERR, TRANS_TX_CLOSE_NORMAL_ERR,
and TRANS_TX_ERR_FRAME_TXED errors. They do not mean
that the queue is full in the host, but rather it is
equivalent to meaning the queue is full for the sdev.
To overcome this, the queue depth for the sdev is
reduced to 64 (from 256, set in sas_slave_configure()).
Normally error code SAS_QUEUE_FULL will result in the
sdev queue depth falling, but it falls too slowly during
high-datarate tests and commands timeout before it
has fallen to an adequete level from original value.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
When TRANS_TX_ERR_FRAME_TXED error occurs in
a slot, the command should be re-attempted.
This error is equivalent to meaning that the queue
is full in the sdev (and not the host).
A superflous debug statement is also removed in the
slot complete handler.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
When TRANS_TX_CREDIT_TIMEOUT_ERR or
TRANS_TX_CLOSE_NORMAL_ERR error occur in
a slot, the command should be re-attempted.
This error is equivalent to meaning that the queue
is full in the sdev (and not the host).
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>
Add a function to abort a slot (task) in the target
device and then cleanup and complete the task.
The function is called from work queue context as
it cannot be called from the context where it is
triggered (interrupt).
Flag hisi_sas_slot.abort is added as the flag used
in the slot error handler to indicate whether the
slot needs to be aborted in the sdev prior to
cleanup and finish.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
In hisi_sas_exec_internal_tmf_task(), the check for
SAM_STAT_GOOD is replaced with
TMF_RESP_FUNC_COMPLETE, which is a genuine tmf
response code.
SAM_STAT_GOOD and TMF_RESP_FUNC_COMPLETE have the
same value, so this is why it worked before.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add support in v1 hw driver for ACPI.
A check on whether an ACPI handle is available for the device is used to
decide on whether to use ACPI reset handler or syscon for hw reset.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The hisi_sas driver is required to support both device tree and
ACPI. The scanning of the device properties now uses the Unified Device
Properties API, which serves both OF and ACPI.
Since syscon is not supported by ACPI, syscon is only used in the driver
when device tree is used.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Include code to prep ssp frame and deliver to hardware.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Also include slot_complete_v2_hw handler
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This also includes broadcast handler. Unlike v1 hw, broadcast does not
have its own dedicated interrupt.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add code to initialise the hardware.
Support is also added to deal with the "am-max-transmissions" (amt)
limitation in hip06 controller #1. This is how many connection requests
we can send on the system bus before waiting for a response. Due to
chip bus design, controller #1 is limited to 32 amt, while, by design, a
controller supports 64. The default value for the nibbles in the
relevant registers is 0x40; these need to be programmed with 0x20.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Just add enough to build and init the module.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Since hisi_sas_itct format is different between v1 and v2 hw, give more
general names for some fields.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Since the error record structure is different for v2 hw, make
hisi_sas_err_record opaque and add hisi_sas_err_record_v1.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Since v2 hw only supports 2048 itct entries, as opposed to 4096 for v1
hw, set the max itct entries to the lower of the two.
It is not anticipated that any device with v1 will ever require to
connect > 2048 devices.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Since v2 hardware permits different numbers of commands to v1, set this
as configurable in hisi_sas_hw.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Relocate DEV_IS_EXPANDER to hisi_sas.h as it will be required for v2 hw
support.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Completion header bit CMPLT_HDR_RSPNS_XFRD flags whether the response
frame is received into host memory, and not whether the response frame
has an error. As such, change the decision on whether a slot has an
error. Also redundant check on CMPLT_HDR_CMD_CMPLT_MSK is removed.
Fixes: 27a3f229 ("hisi_sas: Add cq interrupt handler")
Signed-off-by: John Garry <john.garry@huawei.com>
Tested-by: Ricardo Salveti <ricardo.salveti@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Not every arch has io, so fix build by adding necessary dependency.
Signed-off-by: John Garry <john.garry@huawei.com>
Suggested-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The HiSilicon SAS HBA is available in HiSilicon arm64 SoCs only.
Restrict it to arm64, unless compile-testing.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
By reading in itct.qw0 into a 32b variable the top 32 bits were being
lost. In practice this was OK as they were zeroes.
Fixes: 27a3f229 ("hisi_sas: Add cq interrupt")
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Shane Seymour <shane.seymour@hpe.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
We were doing a arithmetic comparison instead of logical shift by
accident. Mis-programming the itct did not seem to make a difference to
operation.
Fixes: abda97c2fe ("hisi_sas: Add dev_found")
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Shane Seymour <shane.seymour@hpe.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The mask fields are for quad-words, so add ULL suffix. Also
unreferenced ITCT_HDR_BREAK_REPLY and ITCT_HDR_MAX_BURST are removed.
Fixes: 50af155b6c ("hisi_sas: Add v1 hardware reg")
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Shane Seymour <shane.seymour@hpe.com>
Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
It is preferred that drivers use platform_get_irq() instead of
irq_of_parse_and_map(), so replace.
Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
There were a couple cases where the error codes weren't set and also I
changed the success return to "return 0;" which is the same as
"return rc;" but more explicit.
Fixes: 42e7a69368 ('hisi_sas: Add ssp command functio')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Originally the driver would use of_irq_count to calculate how much
memory is required for storing the interrupt names, since the number of
interrupt sources for the controller is variable. Since of_irq_count
cannot be used by the driver, use fixed names.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add handlers for fatal interrupts.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add method for lldd_control_phy. Currently link rate control and spinup
hold is unsupported.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add function methods for tmf's.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add functions for scsi host template scan_finished and scan_start
methods.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add support for smp function, which allows devices attached by expander
to be controlled.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This is for expander broadcast event.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add abnormal irq handler. This handler is concerned with phy down event.
Also add port formed and port deformed handlers.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add functions to deal with lldd_dev_found and lldd_dev_gone.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add cq interrupt handler and also slot error handler function.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add path to send ssp command to HW.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add code to interrupts, so now we can get a phy up interrupt when a disk
is connected.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add module init code for v1 hw.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Include initialisation.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The SAS address for the HBA comes from the device tree.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Each completion queue has a structure. This is mainly for passing to irq
handler so we know which queue the irq occured on.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add functionality to init slot indexing.
Slot indexing is for the host to track which slots (or tags) are free
and which are used.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch also includes relevant memory/pool freeing and sas/scsi host
removal.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Scan the device tree for all properties. Also do this:
- do ioremap for SAS registers
- allocate memory for interrupt names
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add functionality to register device as a scsi host.
The SAS domain transport ops are empty at this point.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch adds the initial bare main driver for the HiSilicon SAS
HBA. This only introduces the changes to build and load the main driver
module.
The complete driver consists of the core main module and also a module
platform driver for driving the hw.
The HBA is a platform device.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
