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| author | Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> | 2017-11-20 11:39:37 +0530 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-11-20 20:36:07 -0600 |
| commit | cbbd16bfbeef40b9f98d9d457fa024a23bfcc23e (patch) | |
| tree | 50d77686a5a4f2d7dd22ece23a83464d41e605b0 /include | |
| parent | 701556d2ea9b890a389183907ae484b78c05c665 (diff) | |
| download | skiboot-cbbd16bfbeef40b9f98d9d457fa024a23bfcc23e.zip skiboot-cbbd16bfbeef40b9f98d9d457fa024a23bfcc23e.tar.gz skiboot-cbbd16bfbeef40b9f98d9d457fa024a23bfcc23e.tar.bz2 | |
sensors: dts: Assert special wakeup on idle cores while reading temperature
In P9, when a core enters a stop state, its clocks will be stopped
to save power and hence we will not be able to perform a scom
operation to read the DTS temperature sensor. Hence, assert
a special wakeup on cores that have entered a stop state in order to
successfully complete the scom operation.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
[rlippert@google.com: Clear special wakeup only when it succeeds]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/cpu.h | 14 | ||||
| -rw-r--r-- | include/dts.h | 2 |
2 files changed, 15 insertions, 1 deletions
diff --git a/include/cpu.h b/include/cpu.h index 168fa99..d4b7a42 100644 --- a/include/cpu.h +++ b/include/cpu.h @@ -23,6 +23,7 @@ #include <device.h> #include <opal.h> #include <stack.h> +#include <timer.h> /* * cpu_thread is our internal structure representing each @@ -102,6 +103,16 @@ struct cpu_thread { struct lock dctl_lock; /* primary only */ bool dctl_stopped; /* per thread */ uint32_t special_wakeup_count; /* primary */ + + /* + * For reading DTS sensors async + */ + struct lock dts_lock; + struct timer dts_timer; + void *sensor_data; + u32 sensor_attr; + u32 token; + bool dts_read_in_progress; }; /* This global is set to 1 to allow secondaries to callin, @@ -284,4 +295,7 @@ extern void cpu_idle_delay(unsigned long delay); extern void cpu_set_radix_mode(void); extern void cpu_fast_reboot_complete(void); +int dctl_set_special_wakeup(struct cpu_thread *t); +int dctl_clear_special_wakeup(struct cpu_thread *t); + #endif /* __CPU_H */ diff --git a/include/dts.h b/include/dts.h index b37919f..17e2e15 100644 --- a/include/dts.h +++ b/include/dts.h @@ -19,7 +19,7 @@ #include <stdint.h> -extern int64_t dts_sensor_read(uint32_t sensor_hndl, uint32_t *sensor_data); +extern int64_t dts_sensor_read(u32 sensor_hndl, int token, u32 *sensor_data); extern bool dts_sensor_create_nodes(struct dt_node *sensors); #endif /* __DTS_H */ |