diff options
Diffstat (limited to 'drivers/hwtracing/intel_th/intel_th.h')
| -rw-r--r-- | drivers/hwtracing/intel_th/intel_th.h | 39 |
1 files changed, 24 insertions, 15 deletions
diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h index 496286ce79e8..6243ac1b8bf1 100644 --- a/drivers/hwtracing/intel_th/intel_th.h +++ b/drivers/hwtracing/intel_th/intel_th.h @@ -172,6 +172,16 @@ struct intel_th_driver { #define to_intel_th_driver_or_null(_d) \ ((_d) ? to_intel_th_driver(_d) : NULL) +/* + * Subdevice tree structure is as follows: + * + struct intel_th device (pci; dev_{get,set}_drvdata() + * + struct intel_th_device INTEL_TH_SWITCH (GTH) + * + struct intel_th_device INTEL_TH_OUTPUT (MSU, PTI) + * + struct intel_th_device INTEL_TH_SOURCE (STH) + * + * In other words, INTEL_TH_OUTPUT devices are children of INTEL_TH_SWITCH; + * INTEL_TH_SWITCH and INTEL_TH_SOURCE are children of the intel_th device. + */ static inline struct intel_th_device * to_intel_th_parent(struct intel_th_device *thdev) { @@ -183,24 +193,12 @@ to_intel_th_parent(struct intel_th_device *thdev) return to_intel_th_device(parent); } -static inline struct intel_th_device * -to_intel_th_hub(struct intel_th_device *thdev) -{ - /* - * subdevice tree is flat: if this one is not a switch, its - * parent must be - */ - if (thdev->type == INTEL_TH_SWITCH) - return thdev; - - return to_intel_th_parent(thdev); -} - static inline struct intel_th *to_intel_th(struct intel_th_device *thdev) { - thdev = to_intel_th_hub(thdev); + if (thdev->type == INTEL_TH_OUTPUT) + thdev = to_intel_th_parent(thdev); - if (WARN_ON_ONCE(!thdev || thdev->type != INTEL_TH_SWITCH)) + if (WARN_ON_ONCE(!thdev || thdev->type == INTEL_TH_OUTPUT)) return NULL; return dev_get_drvdata(thdev->dev.parent); @@ -254,6 +252,17 @@ struct intel_th { #endif }; +static inline struct intel_th_device * +to_intel_th_hub(struct intel_th_device *thdev) +{ + if (thdev->type == INTEL_TH_SWITCH) + return thdev; + else if (thdev->type == INTEL_TH_OUTPUT) + return to_intel_th_parent(thdev); + + return to_intel_th(thdev)->hub; +} + /* * Register windows */ |