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path: root/drivers/hwtracing/intel_th/intel_th.h
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Diffstat (limited to 'drivers/hwtracing/intel_th/intel_th.h')
-rw-r--r--drivers/hwtracing/intel_th/intel_th.h104
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.
*/