diff options
| -rw-r--r-- | drivers/hwtracing/intel_th/core.c | 26 | ||||
| -rw-r--r-- | drivers/hwtracing/intel_th/intel_th.h | 4 |
2 files changed, 22 insertions, 8 deletions
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c index 79e19627b99f..cdd9b3b26195 100644 --- a/drivers/hwtracing/intel_th/core.c +++ b/drivers/hwtracing/intel_th/core.c @@ -29,6 +29,9 @@ #include "intel_th.h" #include "debug.h" +static bool host_mode __read_mostly; +module_param(host_mode, bool, 0444); + static DEFINE_IDA(intel_th_ida); static int intel_th_match(struct device *dev, struct device_driver *driver) @@ -527,14 +530,19 @@ static int intel_th_populate(struct intel_th *th, struct resource *devres, { struct resource res[3]; unsigned int req = 0; - int i, err; + int src, dst, err; /* create devices for each intel_th_subdevice */ - for (i = 0; i < ARRAY_SIZE(intel_th_subdevices); i++) { - struct intel_th_subdevice *subdev = &intel_th_subdevices[i]; + for (src = 0, dst = 0; src < ARRAY_SIZE(intel_th_subdevices); src++) { + const struct intel_th_subdevice *subdev = + &intel_th_subdevices[src]; struct intel_th_device *thdev; int r; + /* only allow SOURCE and SWITCH devices in host mode */ + if (host_mode && subdev->type == INTEL_TH_OUTPUT) + continue; + thdev = intel_th_device_alloc(th, subdev->type, subdev->name, subdev->id); if (!thdev) { @@ -577,10 +585,12 @@ static int intel_th_populate(struct intel_th *th, struct resource *devres, } if (subdev->type == INTEL_TH_OUTPUT) { - thdev->dev.devt = MKDEV(th->major, i); + thdev->dev.devt = MKDEV(th->major, dst); thdev->output.type = subdev->otype; thdev->output.port = -1; thdev->output.scratchpad = subdev->scrpd; + } else if (subdev->type == INTEL_TH_SWITCH) { + thdev->host_mode = host_mode; } err = device_add(&thdev->dev); @@ -597,14 +607,14 @@ static int intel_th_populate(struct intel_th *th, struct resource *devres, req++; } - th->thdev[i] = thdev; + th->thdev[dst++] = thdev; } return 0; kill_subdevs: - for (i-- ; i >= 0; i--) - intel_th_device_remove(th->thdev[i]); + for (; dst >= 0; dst--) + intel_th_device_remove(th->thdev[dst]); return err; } @@ -717,7 +727,7 @@ void intel_th_free(struct intel_th *th) intel_th_request_hub_module_flush(th); for (i = 0; i < TH_SUBDEVICE_MAX; i++) - if (th->thdev[i] != th->hub) + if (th->thdev[i] && th->thdev[i] != th->hub) intel_th_device_remove(th->thdev[i]); intel_th_device_remove(th->hub); diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h index 4c195786bf1f..3096e7054f6d 100644 --- a/drivers/hwtracing/intel_th/intel_th.h +++ b/drivers/hwtracing/intel_th/intel_th.h @@ -54,6 +54,7 @@ struct intel_th_output { * @num_resources: number of resources in @resource array * @type: INTEL_TH_{SOURCE,OUTPUT,SWITCH} * @id: device instance or -1 + * @host_mode: Intel TH is controlled by an external debug host * @output: output descriptor for INTEL_TH_OUTPUT devices * @name: device name to match the driver */ @@ -64,6 +65,9 @@ struct intel_th_device { unsigned int type; int id; + /* INTEL_TH_SWITCH specific */ + bool host_mode; + /* INTEL_TH_OUTPUT specific */ struct intel_th_output output; |