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2012-05-17scsi: delete the MCA specific drivers and driver codePaul Gortmaker6-4003/+5
The support for CONFIG_MCA is being removed, since the 20 year old hardware simply isn't capable of meeting today's software demands on CPU and memory resources. This commit removes the MCA specific SCSI drivers, and the MCA specific portions of code in dual role ISA/MCA drivers. Also, the MCA specific SCSI documentation is removed. Cc: James Bottomley <[email protected]> Cc: [email protected] Signed-off-by: Paul Gortmaker <[email protected]>
2012-05-17isci: End the RNC resumption wait when the RNC is destroyed.Jeff Skirvin4-11/+33
While the RNC is suspended for I/O cleanup, the remote device can be stopped and the RNC setup for destruction. These changes accomodate that case in the abort path. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Fixed RNC bug that lost the suspension or resumption during destroyJeff Skirvin1-58/+38
This fix corrects the saving of resume parameters when the destruction of the RNC has already been directed, and makes sure not to overwrite the RNC destruction callbacks. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Fix RNC AWAIT_SUSPENSION->INVALIDATING transition.Jeff Skirvin1-5/+13
The RNC state machine would incorrectly transition from SCI_RNC_AWAIT_SUSPENSION directly to SCI_RNC_INVALIDATING when a destruct request was made. This would skip the increment of the suspension count and the abort of pending TCs (although the invalidating state would at least cleanup outstanding TCs). Instead, the RNC will transition to SCI_RNC_SUSPENDED and then start the destruction process. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Manage the IREQ_NO_AUTO_FREE_TAG under scic_lock.Jeff Skirvin1-1/+4
Since there is a possibilty of a timeout waiting for the RNC suspension, handle the exit case from the task termination under scic_lock, and leave the tag allocated if the termination timed-out. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Remove obviated host callback list.Jeff Skirvin5-66/+31
Since the callbacks to libsas now occur under scic_lock, there is no longer any reason to save the completed requests in a separate list for completion to libsas. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Check IDEV_GONE before performing abort path operations.Jeff Skirvin2-21/+57
In the link fail path, set IDEV_GONE for every device on the domain when the last link in the port fails. In the abort path functions like isci_reset_device, make sure that there has not already been a detected domain failure with the device by checking IDEV_GONE, before performing any kind of hard reset, SMP phy control, or TMF operation. The check for IDEV_GONE makes sure that the device in the abort path really has control of the port with which it is associated. This prevents starting hard resets at incorrect times and scheduling unnecessary LUN resets for SATA devices. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Restore the ATAPI device RNC management code.Jeff Skirvin3-20/+34
The ATAPI specific and STP general RNC suspension code had been incorrectly removed from the remote device code. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Don't wait for an RNC suspend if it's being destroyed.Jeff Skirvin3-4/+28
Make sure that the wait for suspend can handle the RNC destruction case. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Change the phy control and link reset interface for HW reasons.Jeff Skirvin1-0/+2
There is an apparent HW lockup caused when the PE is disabled while there is an outstanding TC in progress. This change puts the link into OOB to force the TC to end before the PE is disabled. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Added timeouts to RNC suspensions in the abort path.Jeff Skirvin2-11/+55
This change adds timeouts to the RNC suspension wait. It makes the suspend and resume timeouts the same. The previous resume timeout of 5 ms was too short, and timeouts were seen in resumptions of devices in the abort task/LUN reset path - which would receive an RNC resumed message within a tenth of a second later. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Add protocol indicator for TMF requests.Jeff Skirvin1-0/+6
Requests contructed as task management requests need to have the protocol indicator set so the completion decode can observe any RNC suspension conditions. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Directly control IREQ_ABORT_PATH_ACTIVE when completing TMFs.Jeff Skirvin1-0/+3
TMF requests, unlike normal I/O requests, need to handle I/O management conditions in the completion function because TMFs are not handled in the completion tasklet. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Wait for RNC resumption before leaving the abort path.Jeff Skirvin2-2/+53
In the case of TMF execution, or device resets, wait for the RNC to fully resume before returning to the caller. This ensures that the remote device will not fail I/O requests while waiting for the RNC resumption to complete. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Fix RNC suspend call for SCI_RESUMING state.Jeff Skirvin1-8/+4
Instead of immediately transitioning to the SCI_RNC_AWAIT_SUSPENSION state, handle the SCI_RNC_RESUMING suspend transition from the SCI_RNC_READY state like the SCI_RNC_INVALIDATING --> SCI_RNC_POSTING transitions do now, by setting the destination state for the entry into the READY state. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Manage tag releases differently when aborting tasks.Jeff Skirvin4-6/+12
When an individual request is being terminated, the request's tag is managed in the terminate function. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Callbacks to libsas occur under scic_lock and are synchronized.Jeff Skirvin2-13/+40
This patch changes the callback mechanism to libsas to only occur while the scic_lock is held; the abort path cleanup of I/Os also checks to make sure IREQ_ABORT_PATH_ACTIVE is clear before proceding. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: When in the abort path, defeat other resume calls until done.Jeff Skirvin3-46/+83
Completion of I/Os during the one of the abort path interface calls from libsas can drive remote device state changes and the resumption of the device RNC. This is a problem when the abort path is attempting to cleanup outstanding I/O at the same time - the resumption can prevent the termination from occuring correctly. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Implement waiting for suspend in the abort path.Jeff Skirvin5-22/+66
In order to prevent a device from receiving an I/O request while still in an RNC suspending or resuming state (and therefore failing that I/O back to libsas with a reset required status) wait for the RNC state change before proceding in the abort path. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Make sure all TCs are terminated and cleaned in LUN reset.Jeff Skirvin1-6/+8
In the libsas error path, SATA disks require extra handling in libata to recover operation. However, libsas expects to be able to immediately recover all outstanding I/O once the error handler escalation stops. This patch fixes the condition where the libata error handler is scheduled for operation but libsas has already deleted the outstanding sas_tasks. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Manage the LLHANG timer enable/disable per-device.Jeff Skirvin3-8/+20
The LLHANG timer should be enabled once per device. This patch corrects both the timer enable and the timer disable for the remote device. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Save the suspension hint for upcoming suspensions.Jeff Skirvin4-18/+12
In the case of a suspend call while in SCI_RNC_POSTING or INVALIDATING states, the LLHANG detect needed to be saved so the upcoming suspension would enable it correctly. The unused suspend callback parameters were removed. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Fix the terminated I/O to not call sas_task_abort().Jeff Skirvin1-1/+1
This addresses a regression from the commit "isci: Redesign device suspension, abort, cleanup." in which the sas_task end condition for terminated I/Os was made to call back on sas_task_abort()". This commit will be rolled into the original. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Distinguish between remote device suspension casesJeff Skirvin4-25/+28
For NCQ error conditions among others, there is no need to enable the link layer hang detect timer. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Remove isci_device reqs_in_process and dev_node from isci_device.Jeff Skirvin6-25/+1
Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Only set IDEV_GONE in the device stop path.Jeff Skirvin2-26/+0
Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: All pending TCs are terminated when the RNC is invalidated.Jeff Skirvin1-2/+2
Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Device access in the error path does not depend on IDEV_GONE.Jeff Skirvin1-2/+5
Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Add suspension cases for RNC INVALIDATING, POSTING states.Jeff Skirvin4-63/+105
The RNC can be any of the states in the loop from suspended to ready when the API "suspend" or "resume" are called. This change adds destination states parameters that control the suspension / resumption action of the RNC statemachine for those transition states. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Redesign device suspension, abort, cleanup.Jeff Skirvin11-1474/+418
This commit changes the means by which outstanding I/Os are handled for cleanup. The likelihood is that this commit will be broken into smaller pieces, however that will be a later revision. Among the changes: - All completion structures have been removed from the tmf and abort paths. - Now using one completed I/O list, with the I/O completed in host bit being used to select error or normal callback paths. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Escalate to I_T_Nexus_Reset when the device is gone.Jeff Skirvin1-2/+2
If LUN reset sees that the device is gone, it returns TMF_RESP_FUNC_FAILED to cause libsas to escalate to an I_T_Nexus_Reset. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Remote device stop also suspends the RNC and terminates I/O.Jeff Skirvin1-12/+11
Fixing the remote device state machine to suspend and terminate all outstanding I/O before the device stopped state is reached. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Remote device must be suspended for NCQ cleanup.Jeff Skirvin1-13/+12
When the remote device enters the NCQ error state, the device must be suspended so that the I/O terminations can take place. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Manage device suspensions during TC terminations.Jeff Skirvin3-49/+154
TCs must be terminated only while the RNC is suspended. This commit adds remote device suspensions and resumptions in the abort, reset and termination paths. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Terminate outstanding TCs on TX/RX RNC suspensions.Jeff Skirvin7-32/+188
TCs must only be terminated when RNCs are suspended. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Handle all suspending TC completionsJeff Skirvin7-87/+242
Add comprehensive decode for all TC completions that generate RNC suspensions. Note that this commit also removes unconditional resumptions of ATAPI devices when in the SCI_STP_DEV_ATAPI_ERROR state, and STP devices when in the SCI_STP_DEV_IDLE state. This is because the SCI_STP_DEV_IDLE and SCI_STP_DEV_ATAPI state entry functions manage the RNC resumption. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Fixed bug in resumption from RNC Tx/Rx suspend state.Jeff Skirvin1-5/+7
The resumption from the Tx/Rx suspended state should work the same as the Tx suspended state. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Manage the link layer hang detect timer for RNC suspensions.Jeff Skirvin4-2/+51
For STP devices under certain protocol conditions, an RNC will not suspend until the current transfer state is broken with a SYNC/ESC sequence from the SCU. The SYNC/ESC driven by expiration of the SCU link layer hang detect timer, which has too small a dynamic range to support slow SATA devices, so normally it is disabled. This change enables the timer with the minimum period at the point when the suspension is requested. Note that there is potential collateral damage to other open connections to slow SATA devices on the same port, since there is no alternative but to enable the LLHANG timer on every phy in the port for the current suspension request - there is no way to tell on which phy the RNC in question is currently active. Signed-off-by: Jeff Skirvin <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: fix oem parameter validation on single controller skusDan Williams1-1/+1
OEM parameters [1] are parsed from the platform option-rom / efi driver. By default the driver was validating the parameters for the dual-controller case, but in single-controller case only the first set of parameters may be valid. Limit the validation to the number of actual controllers detected otherwise the driver may fail to parse the valid parameters leading to driver-load or runtime failures. [1] the platform specific set of phy address, configuration,and analog tuning values [stable v3.0+] Cc: <[email protected]> Reported-by: Dave Jiang <[email protected]> Tested-by: Dave Jiang <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: enable BCN in sci_port_add_phy()Maciej Trela1-0/+2
Ensure we enable receiving BCN's from the hardware when adding phy to isci_port. Otherwise if we get BCN before the port is created we won't see any BCN Signed-off-by: Maciej Trela <[email protected]> Reported-by: Richard Boyd <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Changes in COMSAS timings enabling ISCI to detect buggy disc drives.Andrzej Jakowski2-0/+63
This patch extends timings in COMSAS signaling, so ISCI can detect disc drives having issues to send COMSAS in correct time frame. Signed-off-by: Andrzej Jakowski <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: kill isci_host.shostDan Williams2-10/+12
We can retrieve the shost from the sas_ha like the rest of libsas and drop this out of our local data structure. Acked-by: Jacek Danecki <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: fix interrupt disableDan Williams2-13/+27
There is a (dubious?) lost irq workaround in sci_controller_isr() that effectively nullifies attempts to disable interrupts. Until the workaround can be re-evaluated add some infrastructure to prevent the interrupt handler from inadvertantly re-enabling interrupts. The failure mode was interrupts continuing to run after the driver had been removed and its iomappings torn down. Reported-by: Jacek Danecki <[email protected]> Tested-by: Jacek Danecki <[email protected]> [richard: clear remaining interrupts at the end of reset] Acked-by: Richard Boyd <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: fix 'link-up' events occur after 'start-complete'Dan Williams3-38/+50
The call to wait_for_start() is meant to ensure that all links have been given a chance to come up before letting the kernel proceed with probing. However, the implementation is not correctly syncing with the port configuration agent. In the MPC case the ports are hard-coded, in the APC case we need to wait for the port-configuration to form ports from the started phys. Towards that end increase the timeout for the APC agent to form ports, and delay start complete until all phys are out of link-training. Cc: <[email protected]> Cc: Richard Boyd <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: fix controller stopDan Williams2-52/+55
1/ notify waiters when controller stop completes (fixes 10 second stall unloading the driver) 2/ make sure phy stop is after port and device stop Cc: Richard Boyd <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: refactor initialization for S3/S4Dan Williams8-360/+277
Based on an original implementation by Ed Nadolski and Artur Wojcik In preparation for S3/S4 support refactor initialization so that driver-load and resume-from-suspend can share the common init path of isci_host_init(). Organize the initialization into objects that are self-contained to the driver (initialized by isci_host_init) versus those that have some upward registration (initialized at allocation time asd_sas_phy, asd_sas_port, dma allocations). The largest change is moving the the validation of the oem and module parameters from isci_host_init() to isci_host_alloc(). The S3/S4 approach being taken is that libsas will be tasked with remembering the state of the domain and the lldd is free to be forgetful. In the case of isci we'll just re-init using a subset of the normal driver load path. [clean up some unused / mis-indented function definitions in host.h] Signed-off-by: Ed Nadolski <[email protected]> Signed-off-by: Artur Wojcik <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: kill isci_port.domain_dev_listDan Williams3-15/+6
Another unused field, and isci_port_init is overkill. Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: kill ->status, and ->state_lock in isci_hostDan Williams2-34/+0
They serve no incremental purpose over the existing sas_ha state. Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: Don't filter BROADCAST CHANGE primitivesTom Jackson1-0/+7
Per the SAS spec, several types of BROADCAST CHANGE primitives must cause re-discovery of the originating expander. Only the standard BROADCAST CHANGE primitive was being sent to the LIBSAS layer. The other BC primitives have been added to the sci_phy_event_handler() Signed-off-by: Tom Jackson <[email protected]> Signed-off-by: Dan Williams <[email protected]>
2012-05-17isci: kill sci_phy_protocol and sci_request_protocolDan Williams6-37/+21
Holdovers from the initial driver cleanup, replace with enum sas_protocol. Signed-off-by: Dan Williams <[email protected]>
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