Add rsmi_dev_drm_render_minor_get()

Function to get the drm minor number associated with ROCm device

Change-Id: I9356b9ca75151882acbb075076bc072f08b73aae
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>

include/rocm_smi/rocm_smi.h

@@ -830,6 +830,25 @@ rsmi_status_t rsmi_dev_subsystem_id_get(uint32_t dv_ind, uint16_t *id);
 rsmi_status_t
 rsmi_dev_subsystem_name_get(uint32_t dv_ind, char *name, size_t len);
 
+/**
+ *  @brief Get the drm minor number associated with this device
+ *
+ *  @details Given a device index @p dv_ind, find its render device file
+ *  /dev/dri/renderDN where N corresponds to its minor number.
+ *
+ *  @param[in] dv_ind a device index
+ *
+ *  @param[inout] minor a pointer to a uint32_t into which minor number will
+ *  be copied
+ *
+ *  @retval :: RSMI_STATUS_SUCCESS is returned upon successful call.
+ *  @retval :: RSMI_STATUS_INIT_ERROR if failed to get minor number during
+ *  initialization.
+ *
+ */
+rsmi_status_t
+rsmi_dev_drm_render_minor_get(uint32_t dv_ind, uint32_t *minor);
+
 /**
  *  @brief Get the device subsystem vendor id associated with the device with
  *  provided device index.

include/rocm_smi/rocm_smi_device.h

@@ -139,6 +139,8 @@ class Device {
     int writeDevInfo(DevInfoTypes type, std::string val);
     uint32_t index(void) const {return index_;}
     void set_index(uint32_t index) {index_ = index;}
+    uint32_t drm_render_minor(void) const {return drm_render_minor_;}
+    void set_drm_render_minor(uint32_t minor) {drm_render_minor_ = minor;}
     static rsmi_dev_perf_level perfLvlStrToEnum(std::string s);
     uint64_t bdfid(void) const {return bdfid_;}
     void set_bdfid(uint64_t val) {bdfid_ = val;}
@@ -153,6 +155,7 @@ class Device {
     std::string path_;
     shared_mutex_t mutex_;
     uint32_t index_;
+    uint32_t drm_render_minor_;
     const RocmSMI_env_vars *env_;
     template <typename T> int openSysfsFileStream(DevInfoTypes type, T *fs,
                                                    const char *str = nullptr);