There is a condition whereby TCs (task contexts) can jump to the head of
the round robin queue causing indefinite starvation of pending tasks.
Posting a TC to a suspended RNC (remote node context) causes the
hardware to select that task first, but since the RNC is suspended the
scheduler proceeds to the next task in the expected round robin fashion,
restoring TC arbitration fairness.
Signed-off-by: Tomasz Chudy <tomasz.chudy@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Prepare the timer api for the arrival of dynamic creation and
destruction events from the core. It pretended to do this previously
but the core to date only used it in a static init-time only fashion.
This is an interim fix until a cleaner event queue can be developed.
1/ make all locking external to the api (add WARN_ONCE to verify)
2/ add a timer_destroy interface (to be used by the core)
3/ use del_timer_sync() prior to deallocating timer data
4/ delete the "timer_list" indirection, we only have timers allocated
for the isci_host
5/ fix detection of timer list allocation errors
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Undo the open coded and incorrect translation of the oem parameter sas
address to its libsas expected format.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Removed all callbacks in the deprecated.c. Core will call the appropriate
functions directly.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Renaming the callbacks to apparopriate event notify calls for the LLDD.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Remove abstraction for SG building and get rid of callbacks for getting
DMA memory mapping.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
We can copy the data directly to and from sg for SATA PIO read operations.
There is no reason to involve the hardware SGL. In the process we also need
to kmap the sg because we don't know where that can come from.
We also do to not call phys_to_virt(). The driver already has the information.
We can just calculcate the appropriate offets.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
These macros are not necessary. We can do 64bit math directly.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Sending aborts/resets to SAS/SATA targets in APC mode eventually causes
an assert in scic_sds_apc_agent_link_up(). We need to handle the hard reset
case for apc mode ports.
Signed-off-by: Piotr Sawicki <piotr.sawicki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Update the SCI Core to comprehend the changes in the TC completion
codes from A0 to B0. Specifically, there isnew R_ER code
differences for command and data FISes.
Changes are as follows:
1) 0x16 now additionally indicates an R_ERR received for a COMMAND
FIS being sent to a SATA target. 0x16 for SSP still indicates a
NAK received for a COMMAND frame. Fix is to retry TC to be compliant
with SATA spec or ensure proper error handling of return value
(not spec compliant I don't believe).
2) 0x1B was previously called DONE_BREAK_RCVD for STP and
DONE_LL_ABORT_ERR for SSP. Now it is universally called
DONE_LL_ABORT_ERR. This is purely a superficial change.
3) 0x32 is no longer a reserved code. Now it indicates
DONE_CMD_SDMA_ERR for STP/SSP. There was a fatal error on the
SDMA for a command IU (includes Raw frames). Consider retry,
but at a minimum gracefully fail the request.
4) 0x33 is no longer a reserved code. Now it indicates
DONE_CMD_LL_ABORT_ERR for SSP. There was a break receivd
during transmission of a command IU. Consider retry, but
at a minimum gracefully fail the request.
Signed-off-by: Tomasz Chudy <Tomasz.Chudy@intel.com>
Signed-off-by: Jacek Danecki <Jacek.Danecki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Use the dynamic revision detection code in
scic_sds_phy_link_layer_initialization() and apply some coding style
fixups (long deref chains). The compile time max link rate setting is
removed in favor of honoring the user-parameter max.
Reported-by: Krzysztof Wierzbicki <Krzysztof.Wierzbicki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Add support for the following parameters in SCIC:
/**
* This field specifies the NOTIFY (ENABLE SPIN UP) primitive
* insertion frequency for this phy index.
*/
u32 notify_enable_spin_up_insertion_frequency;
/**
* This method specifies the number of transmitted DWORDs within which
* to transmit a single ALIGN primitive. This value applies regardless
* of what type of device is attached or connection state. A value of
* 0 indicates that no ALIGN primitives will be inserted.
*/
u16 align_insertion_frequency;
/**
* This method specifies the number of transmitted DWORDs within which
* to transmit 2 ALIGN primitives. This applies for SAS connections
* only. A minimum value of 3 is required for this field.
*/
u16 in_connection_align_insertion_frequency;
Signed-off-by: Krzysztof Wierzbicki <Krzysztof.Wierzbicki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
At init and RNC resume we need to touch every phy in a port to be sure
we have initialized STP properties in the case where port_index !=
phy_index. Also add some missing __iomem annotations.
Signed-off-by: Henryk Dembkowski <henryk.dembkowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The default should be 5us. The hardware encodes it in 256ns increments,
so the value should be 20 to approximate a 5us timeout.
Signed-off-by: Tomasz Chudy <Tomasz.Chudy@intel.com>
Signed-off-by: Jacek Danecki <Jacek.Danecki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
c99 the struct initializers:
1/ allows grep to consistently show method name associations. The
naming is mostly consistent (except when it isn't) so this guarantees
coverage of present and future exception cases.
2/ let's the compiler guarantee that the state table array entry
correlates with an actual state name and detect accidental reordering or
deletion of states.
/ allows default handler's to be identified easily
Signed-off-by: Jacek Danecki <Jacek.Danecki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Moved the firmware loading from per adapter to per PCI device. This should
prevent firmware from being loaded twice becuase of 2 SCU controller per
PCI device. We do have to do it per PCI device because request_firmware()
requires a struct device passed in.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The proc_name field in struct scsi_host_template is exported through sysfs and
allows userspace tools to identify the driver behind a particular SCSI host
controller.
Initialize this field so that userspace tools can easily identify isci host
controllers through sysfs.
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This removes scic_controller_get_handler_methods and its
associated unused code.
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
[djbw: kill off the legacy handler, now that we have basic error isr support]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Some of the chain walks to get back to our dev are invalid.
isci_remote_device_change_state: delete rather than adding conditional deref
chain walking
isci_request_change_state: fix, it was being called too early
isci_request_ssp_io_request_get_lun: fix compile breakage hidden by ifdef DEBUG
Signed-off-by: Maciej Trela <maciej.trela@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Inform libsas of the linkrate of direct attached links.
Reported-by: Haavard Skinnemoen <hskinnemoen@gmail.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Polling the event queue during scan is an unneeded holdover from the
original driver.
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
[djbw: ensure we flush all port events and domain discovery]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The lldd actively disallows requests in the "starting" state. Retrying
or holding off commands in this state is sub-optimal:
1/ it adds another state check to the fast path
2/ retrying can cause libsas to give up
However, isci's ->lldd_dev_found() routine already waits for controller
start to complete before allowing further progress. Checking the
"starting" state in isci_task_execute_task and the isr is redundant and
misleading. Clean this up and introduce a controller-wide event queue
to start reeling in "completion" proliferation in the driver.
The "stopping" state cleanups are in a similar vein, rely on the the isr
and other paths being precluded from occurring rather than implementing
state checking logic.
Reported-by: Christoph Hellwig <hch@infradead.org>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The indirection is unecessary and broken in the current case that assigns the
handlers based on a not up-to-date pdev->msix_enabled value.
Route the handlers directly to the requisite core routines.
Todo: hook up error interrupt handling
Reported-by: Jeff Garzik <jeff@garzik.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This will be replaced by state machine tracepoints and should have been a part
of the logger removal.
Ran across scic_sds_port_decrement_request_count() which is an ugly macro
which silently hides accounting errors. Turn it into a WARN_ONCE to see if it
ever triggers.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Callbacks are already type unsafe, obfuscating things further by casting the
callback routine is less safe because now function argument number changes
will not be caught by the compiler.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Change names from upper to low letters
Signed-off-by: Henryk Dembkowski <henryk.dembkowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Remove duplicated license and header file includes that were leftover
from commit 4c1db2d0 "isci: consolidate core" (in the isci.git historical
branch).
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
scic_sds_stp_remote_device_ready_substate_handler_table[]
scic_sds_smp_remote_device_ready_substate_handler_table[]
c99 the struct initializers:
1/ allows grep to consistently show method name associations. The
naming is mostly consistent (except when it isn't) so this guarantees
coverage of present and future exception cases.
2/ let's the compiler guarantee that the state table array entry
correlates with an actual state name and detect accidental reordering or
deletion of states.
3/ allows default handler's to be identified easily
Signed-off-by: Henryk Dembkowski <henryk.dembkowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Change names from upper to low letters
Signed-off-by: Henryk Dembkowski <henryk.dembkowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
c99 the struct initializers (scic_sds_remote_device_state_handler_table[]):
1/ allows grep to consistently show method name associations. The
naming is mostly consistent (except when it isn't) so this guarantees
coverage of present and future exception cases.
2/ let's the compiler guarantee that the state table array entry
correlates with an actual state name and detect accidental reordering or
deletion of states.
3/ allows default handler's to be identified easily
Change names from upper to low letters
Cleanup empty lines
Signed-off-by: Henryk Dembkowski <henryk.dembkowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
We no longer use the loglevel parameter. Remove.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
[rebased after killing SCI_IO_REQUEST_DATA_DIRECTION]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
It's an unnecessary typedef that mirrors the kernel's enum
dma_data_direction.
Also cleanup some long variable names along the way.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Support for the up to 2x4-port 6Gb/s SAS controllers embedded in the
chipset.
This is a snapshot of the first publicly available version of the driver,
commit 4c1db2d0 in the 'historical' branch.
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/isci.git historical
Signed-off-by: Maciej Trela <maciej.trela@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging:
hwmon: (pmbus) Auto-detect temp2 and temp3 registers/attributes
hwmon: (pmbus) Improve fan detection
hwmon: (adm1275) Free allocated memory if probe function fails
hwmon: (pmbus) Drop check for PMBus revision register in probe function
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
Revert "drm/nvc0: recognise 0xdX chipsets as NV_C0"
drm/radeon/kms: fix typo in cayman reg offset
drm/radeon/kms: use correct reg on fusion when reading back mem config
Some callers of pm_runtime_get_sync() and other runtime PM helper
functions, scsi_autopm_get_host() and scsi_autopm_get_device() in
particular, need to distinguish error codes returned when runtime PM
is disabled (i.e. power.disable_depth is nonzero for the given
device) from error codes returned in other situations. For this
reason, make the runtime PM helper functions return -EACCES when
power.disable_depth is nonzero and ensure that this error code
won't be returned by them in any other circumstances. Modify
scsi_autopm_get_host() and scsi_autopm_get_device() to check the
error code returned by pm_runtime_get_sync() and ignore -EACCES.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
The common PM clock management functions may be used for system
suspend/resume as well as for runtime PM, so rename them
accordingly. Modify kerneldoc comments describing these functions
and kernel messages printed by them, so that they refer to power
management in general rather that to runtime PM.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
The common clocks management code in drivers/base/power/clock_ops.c
is going to be used during system-wide power transitions as well as
for runtime PM, so it shouldn't depend on CONFIG_PM_RUNTIME.
However, the suspend/resume functions provided by it for
CONFIG_PM_RUNTIME unset, to be used during system-wide power
transitions, should not behave in the same way as their counterparts
defined for CONFIG_PM_RUNTIME set, because in that case the clocks
are managed differently at run time.
The names of the functions still contain the word "runtime" after
this change, but that is going to be modified by a separate patch
later.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
There is the problem how to handle devices set up to wake up the
system from sleep states during system-wide power transitions.
In some cases, those devices can be turned off entirely, because the
wakeup signals will be generated on their behalf anyway. In some
other cases, they will generate wakeup signals if their clocks are
stopped, but only if power is not removed from them. Finally, in
some cases, they can only generate wakeup signals if power is not
removed from them and their clocks are enabled.
To allow platform-specific code to decide whether or not to put
wakeup devices (and their PM domains) into low-power state during
system-wide transitions, such as system suspend, introduce a new
generic PM domain callback, .active_wakeup(), that will be used
during the "noirq" phase of system suspend and hibernation (after
image creation) to decide what to do with wakeup devices.
Specifically, if this callback is present and returns "true", the
generic PM domain code will not execute .stop_device() for the
given wakeup device and its PM domain won't be powered off.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Kevin Hilman <khilman@ti.com>
Make generic PM domains support system-wide power transitions
(system suspend and hibernation). Add suspend, resume, freeze, thaw,
poweroff and restore callbacks to be associated with struct
generic_pm_domain objects and make pm_genpd_init() use them as
appropriate.
The new callbacks do nothing for devices belonging to power domains
that were powered down at run time (before the transition). For the
other devices the action carried out depends on the type of the
transition. During system suspend the power domain .suspend()
callback executes pm_generic_suspend() for the device, while the
PM domain .suspend_noirq() callback runs pm_generic_suspend_noirq()
for it, stops it and eventually removes power from the PM domain it
belongs to (after all devices in the domain have been stopped and its
subdomains have been powered off).
During system resume the PM domain .resume_noirq() callback
restores power to the PM domain (when executed for it first time),
starts the device and executes pm_generic_resume_noirq() for it,
while the .resume() callback executes pm_generic_resume() for the
device. Finally, the .complete() callback executes pm_runtime_idle()
for the device which should put it back into the suspended state if
its runtime PM usage count is equal to zero at that time.
The actions carried out during hibernation and resume from it are
analogous to the ones described above.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
There is some code in drivers/base/power/domain.c that will be useful
for both runtime PM and system-wide power transitions, so make it
depend on CONFIG_PM instead of CONFIG_PM_RUNTIME.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Introduce generic "noirq" power management callback routines for
subsystems in addition to the "regular" generic PM callback routines.
The new routines will be used, among other things, for implementing
system-wide PM transitions support for generic PM domains.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Introduce common headers, helper functions and callbacks allowing
platforms to use simple generic power domains for runtime power
management.
Introduce struct generic_pm_domain to be used for representing
power domains that each contain a number of devices and may be
parent domains or subdomains with respect to other power domains.
Among other things, this structure includes callbacks to be
provided by platforms for performing specific tasks related to
power management (i.e. ->stop_device() may disable a device's
clocks, while ->start_device() may enable them, ->power_off() is
supposed to remove power from the entire power domain
and ->power_on() is supposed to restore it).
Introduce functions that can be used as power domain runtime PM
callbacks, pm_genpd_runtime_suspend() and pm_genpd_runtime_resume(),
as well as helper functions for the initialization of a power
domain represented by a struct generic_power_domain object,
adding a device to or removing a device from it and adding or
removing subdomains.
Introduce configuration option CONFIG_PM_GENERIC_DOMAINS to be
selected by the platforms that want to use the new code.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Reviewed-by: Kevin Hilman <khilman@ti.com>
The naming convention used by commit 7538e3db6e015e890825fbd9f86599b
(PM: Add support for device power domains), which introduced the
struct dev_power_domain type for representing device power domains,
evidently confuses some developers who tend to think that objects
of this type must correspond to "power domains" as defined by
hardware, which is not the case. Namely, at the kernel level, a
struct dev_power_domain object can represent arbitrary set of devices
that are mutually dependent power management-wise and need not belong
to one hardware power domain. To avoid that confusion, rename struct
dev_power_domain to struct dev_pm_domain and rename the related
pointers in struct device and struct pm_clk_notifier_block from
pwr_domain to pm_domain.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Kevin Hilman <khilman@ti.com>
The RTC core handles UIE since 6610e08 (RTC: Rework RTC code to use
timerqueue for events), so remove the specific interrupt in this driver.
To make it work at all, enable interrupts in set_alarm() if needed. Drop
IRQF_DISABLED which is deprecated, while we are here. Finally, add my
copyright after all these changes.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Replace the accessors with standard readl/writel to remove their
platform-dependency. Also, drop __raw_(read|write)l-accessors while we
are here.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Tested-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
