diff options
Diffstat (limited to 'drivers/hwtracing/intel_th/intel_th.h')
| -rw-r--r-- | drivers/hwtracing/intel_th/intel_th.h | 104 |
1 files changed, 84 insertions, 20 deletions
diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h index 3096e7054f6d..99ad563fc40d 100644 --- a/drivers/hwtracing/intel_th/intel_th.h +++ b/drivers/hwtracing/intel_th/intel_th.h @@ -48,8 +48,19 @@ struct intel_th_output { }; /** + * struct intel_th_drvdata - describes hardware capabilities and quirks + * @tscu_enable: device needs SW to enable time stamping unit + */ +struct intel_th_drvdata { + unsigned int tscu_enable : 1; +}; + +#define INTEL_TH_CAP(_th, _cap) ((_th)->drvdata ? (_th)->drvdata->_cap : 0) + +/** * struct intel_th_device - device on the intel_th bus * @dev: device + * @drvdata: hardware capabilities/quirks * @resource: array of resources available to this device * @num_resources: number of resources in @resource array * @type: INTEL_TH_{SOURCE,OUTPUT,SWITCH} @@ -59,11 +70,12 @@ struct intel_th_output { * @name: device name to match the driver */ struct intel_th_device { - struct device dev; - struct resource *resource; - unsigned int num_resources; - unsigned int type; - int id; + struct device dev; + struct intel_th_drvdata *drvdata; + struct resource *resource; + unsigned int num_resources; + unsigned int type; + int id; /* INTEL_TH_SWITCH specific */ bool host_mode; @@ -96,6 +108,17 @@ intel_th_device_get_resource(struct intel_th_device *thdev, unsigned int type, return NULL; } +/* + * GTH, output ports configuration + */ +enum { + GTH_NONE = 0, + GTH_MSU, /* memory/usb */ + GTH_CTP, /* Common Trace Port */ + GTH_LPP, /* Low Power Path */ + GTH_PTI, /* MIPI-PTI */ +}; + /** * intel_th_output_assigned() - if an output device is assigned to a switch port * @thdev: the output device @@ -106,7 +129,8 @@ static inline bool intel_th_output_assigned(struct intel_th_device *thdev) { return thdev->type == INTEL_TH_OUTPUT && - thdev->output.port >= 0; + (thdev->output.port >= 0 || + thdev->output.type == GTH_NONE); } /** @@ -161,8 +185,18 @@ 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_hub(struct intel_th_device *thdev) +to_intel_th_parent(struct intel_th_device *thdev) { struct device *parent = thdev->dev.parent; @@ -172,9 +206,20 @@ to_intel_th_hub(struct intel_th_device *thdev) return to_intel_th_device(parent); } +static inline struct intel_th *to_intel_th(struct intel_th_device *thdev) +{ + if (thdev->type == INTEL_TH_OUTPUT) + thdev = to_intel_th_parent(thdev); + + if (WARN_ON_ONCE(!thdev || thdev->type == INTEL_TH_OUTPUT)) + return NULL; + + return dev_get_drvdata(thdev->dev.parent); +} + struct intel_th * -intel_th_alloc(struct device *dev, struct resource *devres, - unsigned int ndevres, int irq); +intel_th_alloc(struct device *dev, struct intel_th_drvdata *drvdata, + struct resource *devres, unsigned int ndevres, int irq); void intel_th_free(struct intel_th *th); int intel_th_driver_register(struct intel_th_driver *thdrv); @@ -184,6 +229,7 @@ int intel_th_trace_enable(struct intel_th_device *thdev); int intel_th_trace_disable(struct intel_th_device *thdev); int intel_th_set_output(struct intel_th_device *thdev, unsigned int master); +int intel_th_output_enable(struct intel_th *th, unsigned int otype); enum { TH_MMIO_CONFIG = 0, @@ -191,8 +237,9 @@ enum { TH_MMIO_END, }; -#define TH_SUBDEVICE_MAX 6 #define TH_POSSIBLE_OUTPUTS 8 +/* Total number of possible subdevices: outputs + GTH + STH */ +#define TH_SUBDEVICE_MAX (TH_POSSIBLE_OUTPUTS + 2) #define TH_CONFIGURABLE_MASTERS 256 #define TH_MSC_MAX 2 @@ -201,6 +248,10 @@ enum { * @dev: driver core's device * @thdev: subdevices * @hub: "switch" subdevice (GTH) + * @resource: resources of the entire controller + * @num_thdevs: number of devices in the @thdev array + * @num_resources: number or resources in the @resource array + * @irq: irq number * @id: this Intel TH controller's device ID in the system * @major: device node major for output devices */ @@ -209,6 +260,14 @@ struct intel_th { struct intel_th_device *thdev[TH_SUBDEVICE_MAX]; struct intel_th_device *hub; + struct intel_th_drvdata *drvdata; + + struct resource *resource; + int (*activate)(struct intel_th *); + void (*deactivate)(struct intel_th *); + unsigned int num_thdevs; + unsigned int num_resources; + int irq; int id; int major; @@ -220,6 +279,17 @@ 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 */ @@ -228,6 +298,10 @@ enum { REG_GTH_OFFSET = 0x0000, REG_GTH_LENGTH = 0x2000, + /* Timestamp counter unit (TSCU) */ + REG_TSCU_OFFSET = 0x2000, + REG_TSCU_LENGTH = 0x1000, + /* Software Trace Hub (STH) [0x4000..0x4fff] */ REG_STH_OFFSET = 0x4000, REG_STH_LENGTH = 0x2000, @@ -250,16 +324,6 @@ enum { }; /* - * GTH, output ports configuration - */ -enum { - GTH_NONE = 0, - GTH_MSU, /* memory/usb */ - GTH_CTP, /* Common Trace Port */ - GTH_PTI = 4, /* MIPI-PTI */ -}; - -/* * Scratchpad bits: tell firmware and external debuggers * what we are up to. */ |