[PATCH libdrm] amdgpu: allow to query GPU sensor related information

[Samuel Pitoiset]

This exposes amdgpu_query_sensor_info().

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 amdgpu/amdgpu.h          | 18 ++++++++++++++++++
 amdgpu/amdgpu_gpu_info.c | 15 +++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/amdgpu/amdgpu.h b/amdgpu/amdgpu.h
index 6b2ded83..55884b24 100644
--- a/amdgpu/amdgpu.h
+++ b/amdgpu/amdgpu.h
@@ -1059,6 +1059,24 @@ int amdgpu_query_gds_info(amdgpu_device_handle dev,
 			struct amdgpu_gds_resource_info *gds_info);
 
 /**
+ * Query information about sensor.
+ *
+ * The return size is query-specific and depends on the "sensor_type"
+ * parameter. No more than "size" bytes is returned.
+ *
+ * \param   dev         - \c [in] Device handle. See #amdgpu_device_initialize()
+ * \param   sensor_type - \c [in] AMDGPU_INFO_SENSOR_*
+ * \param   size        - \c [in] Size of the returned value.
+ * \param   value       - \c [out] Pointer to the return value.
+ *
+ * \return   0 on success\n
+ *          <0 - Negative POSIX Error code
+ *
+*/
+int amdgpu_query_sensor_info(amdgpu_device_handle dev, unsigned sensor_type,
+			     unsigned size, void *value);
+
+/**
  * Read a set of consecutive memory-mapped registers.
  * Not all registers are allowed to be read by userspace.
  *
diff --git a/amdgpu/amdgpu_gpu_info.c b/amdgpu/amdgpu_gpu_info.c
index c5f5f6f4..f4b94c9e 100644
--- a/amdgpu/amdgpu_gpu_info.c
+++ b/amdgpu/amdgpu_gpu_info.c
@@ -318,3 +318,18 @@ int amdgpu_query_gds_info(amdgpu_device_handle dev,
 
 	return 0;
 }
+
+int amdgpu_query_sensor_info(amdgpu_device_handle dev, unsigned sensor_type,
+			     unsigned size, void *value)
+{
+	struct drm_amdgpu_info request;
+
+	memset(&request, 0, sizeof(request));
+	request.return_pointer = (uintptr_t)value;
+	request.return_size = size;
+	request.query = AMDGPU_INFO_SENSOR;
+	request.sensor_info.type = sensor_type;
+
+	return drmCommandWrite(dev->fd, DRM_AMDGPU_INFO, &request,
+			       sizeof(struct drm_amdgpu_info));
+}
-- 
2.12.2