gpu: nvgpu: add support for voltage config

- changes to read voltage tables from VBIOS
  & create boardobj then send to pmu
- Rail, Device & Policy objects are read from VBIOS & created boardobjs
- RPC support to load, Set & get voltage.

JIRA DNVGPU-122

Change-Id: I61621a514eef9c081a64c4ab066f01dfc28f8402
Signed-off-by: Mahantesh Kumbar <mkumbar@nvidia.com>
Reviewed-on: http://git-master/r/1222774
(cherry picked from commit 9da86d8c2c547623cf5f38c89afeb3f5bb1667ac)
Reviewed-on: http://git-master/r/1244656
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/volt/volt_dev.h b/drivers/gpu/nvgpu/volt/volt_dev.h
new file mode 100644
index 00000000..5113567d
--- /dev/null
+++ b/drivers/gpu/nvgpu/volt/volt_dev.h
@@ -0,0 +1,69 @@
+/*
+* Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms and conditions of the GNU General Public License,
+* version 2, as published by the Free Software Foundation.
+*
+* This program is distributed in the hope it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+* more details.
+*/
+
+
+#ifndef _VOLTDEV_H_
+#define _VOLTDEV_H_
+
+#include "boardobj/boardobj.h"
+#include "boardobj/boardobjgrp.h"
+#include "ctrl/ctrlvolt.h"
+
+#define VOLTAGE_TABLE_MAX_ENTRIES_ONE   1
+#define VOLTAGE_TABLE_MAX_ENTRIES       256
+
+struct voltage_device {
+        struct boardobj super;
+        u8 volt_domain;
+        u8 i2c_dev_idx;
+        u32 switch_delay_us;
+        u32 num_entries;
+        struct voltage_device_entry *pentry[VOLTAGE_TABLE_MAX_ENTRIES];
+        struct voltage_device_entry *pcurr_entry;
+        u8 rsvd_0;
+        u8 rsvd_1;
+        u8 operation_type;
+        u32 voltage_min_uv;
+        u32 voltage_max_uv;
+        u32 volt_step_uv;
+};
+
+struct voltage_device_entry {
+        u32  voltage_uv;
+};
+
+struct voltage_device_metadata {
+        struct boardobjgrp_e32 volt_devices;
+};
+
+/*!
+ * Extends VOLTAGE_DEVICE providing attributes specific to PWM controllers.
+ */
+struct voltage_device_pwm {
+        struct voltage_device super;
+        s32 voltage_base_uv;
+        s32 voltage_offset_scale_uv;
+        enum nv_pmu_pmgr_pwm_source source;
+        u32 raw_period;
+};
+
+struct voltage_device_pwm_entry {
+        struct voltage_device_entry  super;
+        u32 duty_cycle;
+};
+/* PWM end */
+
+u32 volt_dev_sw_setup(struct gk20a *g);
+u32 volt_dev_pmu_setup(struct gk20a *g);
+
+#endif /* _VOLTDEV_H_ */