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| author | Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> | 2017-07-28 00:45:29 +0530 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-07-28 14:53:19 +1000 |
| commit | 5bec6cdf92f984cccc09dbe57579760a6e593b79 (patch) | |
| tree | 97b5725aa4ea39a0513f7992083e9c813c8bfb33 /include | |
| parent | c6aabe3f2eb51cf1df7da83432b15a37200f1adb (diff) | |
| download | skiboot-5bec6cdf92f984cccc09dbe57579760a6e593b79.zip skiboot-5bec6cdf92f984cccc09dbe57579760a6e593b79.tar.gz skiboot-5bec6cdf92f984cccc09dbe57579760a6e593b79.tar.bz2 | |
psr: occ: Add support to change power-shifting-ratio
Add support to set the CPU-GPU power shifting ratio which is used by
the OCC power capping algorithm. PSR value of 100 takes all power away
from CPU first and a PSR value of 0 caps GPU first.
Documentation enhanced by Stewart Smith.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/opal-api.h | 4 | ||||
| -rw-r--r-- | include/psr.h | 46 |
2 files changed, 49 insertions, 1 deletions
diff --git a/include/opal-api.h b/include/opal-api.h index 3ad4898..8d33c08 100644 --- a/include/opal-api.h +++ b/include/opal-api.h @@ -210,7 +210,9 @@ #define OPAL_IMC_COUNTERS_STOP 151 #define OPAL_GET_POWERCAP 152 #define OPAL_SET_POWERCAP 153 -#define OPAL_LAST 153 +#define OPAL_GET_POWER_SHIFT_RATIO 154 +#define OPAL_SET_POWER_SHIFT_RATIO 155 +#define OPAL_LAST 155 /* Device tree flags */ diff --git a/include/psr.h b/include/psr.h new file mode 100644 index 0000000..92c0aa5 --- /dev/null +++ b/include/psr.h @@ -0,0 +1,46 @@ +/* Copyright 2017 IBM Corp. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef __PSR_H +#define __PSR_H + +#include <opal.h> + +enum psr_class { + PSR_CLASS_OCC, +}; + +/* + * PSR handle is defined as u32. The first and last bytes are + * used to indicate the class and type. RID indiactes psr class + * specific data. For PSR_CLASS_OCC psr class RID is the chip index. + * + * | Class |Reserved| RID | Type | + * |-------|--------|------|------| + */ + +#define psr_make_handle(class, rid, type) (((class & 0xF) << 24) | \ + ((rid & 0xF) << 8) | (type & 0xF)) + +#define psr_get_class(handle) ((handle >> 24) & 0xF) +#define psr_get_rid(handle) ((handle >> 8) & 0xF) +#define psr_get_type(handle) (handle & 0xF) + +/* Powercap OCC interface */ +int occ_get_psr(u32 handle, u32 *ratio); +int occ_set_psr(u32 handle, int token, u32 ratio); + +#endif /* __PSR_H */ |