Currently, there is no way to know if the power management env is
supported without trying to initialize it. The init API also does
not distinguish between failure due to some error and failure due to
power management not being available on the platform in the first
place.
Thus, add an API that provides capability of probing support for a
specific power management API.
Suggested-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Set all power environment related function pointers to NULL
when unset is being made.
Signed-off-by: Marcin Hajkowski <marcinx.hajkowski@intel.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
On attempt to set_env in already initialized state notify
user by returning error that operation cannot be performed.
Signed-off-by: Marcin Hajkowski <marcinx.hajkowski@intel.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
Due to lack of thread safety in exisiting solution
use spinlock mechanism for atomic
modification of power environment related data.
Fixes: 445c6528b5 ("power: common interface for guest and host")
Cc: stable@dpdk.org
Signed-off-by: Marcin Hajkowski <marcinx.hajkowski@intel.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
Previously, in order to use the power library, it was necessary
for the user to disable the intel_pstate driver by adding
“intel_pstate=disable” to the kernel command line for the system,
which causes the acpi_cpufreq driver to be loaded in its place.
This patch adds the ability for the power library use the intel-pstate
driver.
It adds a new suite of functions behind the current power library API,
and will seamlessly set up the user facing API function pointers to
the relevant functions depending on whether the system is running with
acpi_cpufreq kernel driver, intel_pstate kernel driver or in a guest,
using kvm. The library API and ABI is unchanged.
Signed-off-by: Liang Ma <liang.j.ma@intel.com>
Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
New API added, rte_power_get_capabilities(), that allows the
application to query the power and performance capabilities
of the CPU cores.
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
rename private header file rte_power_kvm_vm.c
to power_kvm_vm.c. This prevents the private
functions from leaking into the documentation.
Change any private functions from
rte_<function_name> to just <function_name>.
Reserve the rte_ for public functions
Signed-off-by: Marko Kovacevic <marko.kovacevic@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
Rename private header file rte_power_acpi_cpufreq.c
to power_acpi_cpufreq.c.This prevents the private
functions from leaking into the documentation.
Change any private functions from rte_<function_name>
to just <function_name>.Reserve the rte_ for public functions.
Signed-off-by: Marko Kovacevic <marko.kovacevic@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
Rename private header file rte_power_common.h
to power_common.h to prevent private functions
from leaking into the documentation.
Signed-off-by: Marko Kovacevic <marko.kovacevic@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
Since this patch-set attempts to clean up the power library,
and there are many instances of "unsigned" caught by checkpatch,
it was decided to clean these up first rather than have them included
in the later patches in the patch set. And would also minimise this
type of error being caught by checkpatch in the future
Signed-off-by: Marko Kovacevic <marko.kovacevic@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
Replace the BSD license header with the SPDX tag for files
with only an Intel copyright on them.
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Moved the current librte_power implementation to rte_power_acpi_cpufreq, with
renaming of functions only.
Added rte_power_kvm_vm implementation to support Power Management from a VM.
librte_power now hides the implementation based on the environment used.
A new call rte_power_set_env() can explicidly set the environment, if not
called then auto-detection takes place.
rte_power_kvm_vm is subset of the librte_power APIs, the following is supported:
rte_power_init(unsigned lcore_id)
rte_power_exit(unsigned lcore_id)
rte_power_freq_up(unsigned lcore_id)
rte_power_freq_down(unsigned lcore_id)
rte_power_freq_min(unsigned lcore_id)
rte_power_freq_max(unsigned lcore_id)
The other unsupported APIs return -ENOTSUP
Signed-off-by: Alan Carew <alan.carew@intel.com>
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
The function rte_snprintf serves no useful purpose. It is the
same as snprintf() for all valid inputs. Deprecate it and
replace all uses in current code.
Leave the tests for the deprecated function in place.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
This commit removes trailing whitespace from lines in files. Almost all
files are affected, as the BSD license copyright header had trailing
whitespace on 4 lines in it [hence the number of files reporting 8 lines
changed in the diffstat].
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
[Thomas: remove spaces before tabs in libs]
[Thomas: remove more trailing spaces in non-C files]
Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
