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, 438 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/volt/volt_rail.c b/drivers/gpu/nvgpu/volt/volt_rail.c
new file mode 100644
index 00000000..87b85160
--- /dev/null
+++ b/drivers/gpu/nvgpu/volt/volt_rail.c
@@ -0,0 +1,438 @@
+/*
+ * 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.
+ */
+
+#include "gk20a/gk20a.h"
+#include "include/bios.h"
+#include "boardobj/boardobjgrp.h"
+#include "boardobj/boardobjgrp_e32.h"
+#include "pmuif/gpmuifboardobj.h"
+#include "gm206/bios_gm206.h"
+#include "ctrl/ctrlvolt.h"
+#include "gk20a/pmu_gk20a.h"
+
+#include "pmuif/gpmuifperfvfe.h"
+#include "include/bios.h"
+#include "volt.h"
+
+u8 volt_rail_volt_domain_convert_to_idx(struct gk20a *g, u8 volt_domain)
+{
+        switch (g->perf_pmu.volt.volt_rail_metadata.volt_domain_hal) {
+        case CTRL_VOLT_DOMAIN_HAL_GP10X_SINGLE_RAIL:
+                if (volt_domain == CTRL_BOARDOBJ_IDX_INVALID)
+                        return 0;
+                break;
+        case CTRL_VOLT_DOMAIN_HAL_GP10X_SPLIT_RAIL:
+                switch (volt_domain) {
+                case CTRL_VOLT_DOMAIN_LOGIC:
+                        return 0;
+                case CTRL_VOLT_DOMAIN_SRAM:
+                        return 1;
+                }
+                break;
+        }
+
+        return CTRL_BOARDOBJ_IDX_INVALID;
+}
+
+u32 volt_rail_volt_dev_register(struct gk20a *g, struct voltage_rail
+        *pvolt_rail, u8 volt_dev_idx, u8 operation_type)
+{
+        u32 status = 0;
+
+        if (operation_type == CTRL_VOLT_DEVICE_OPERATION_TYPE_DEFAULT) {
+                if (pvolt_rail->volt_dev_idx_default ==
+                                CTRL_BOARDOBJ_IDX_INVALID) {
+                        pvolt_rail->volt_dev_idx_default = volt_dev_idx;
+                } else {
+                        status = -EINVAL;
+                        goto exit;
+                }
+        } else {
+                goto exit;
+        }
+
+        status = boardobjgrpmask_bitset(&pvolt_rail->volt_dev_mask.super,
+                        volt_dev_idx);
+
+exit:
+        if (status)
+                gk20a_err(dev_from_gk20a(g), "Failed to register VOLTAGE_DEVICE");
+
+        return status;
+}
+
+static u32 volt_rail_state_init(struct gk20a *g,
+                struct voltage_rail *pvolt_rail)
+{
+        u32 status = 0;
+        u32 i;
+
+        pvolt_rail->volt_dev_idx_default = CTRL_BOARDOBJ_IDX_INVALID;
+
+        for (i = 0; i < CTRL_VOLT_RAIL_VOLT_DELTA_MAX_ENTRIES; i++) {
+                pvolt_rail->volt_delta_uv[i] = NV_PMU_VOLT_VALUE_0V_IN_UV;
+                g->perf_pmu.volt.volt_rail_metadata.ext_rel_delta_uv[i] =
+                        NV_PMU_VOLT_VALUE_0V_IN_UV;
+        }
+
+        pvolt_rail->volt_margin_limit_vfe_equ_mon_handle =
+                NV_PMU_PERF_RPC_VFE_EQU_MONITOR_COUNT_MAX;
+        pvolt_rail->rel_limit_vfe_equ_mon_handle =
+                NV_PMU_PERF_RPC_VFE_EQU_MONITOR_COUNT_MAX;
+        pvolt_rail->alt_rel_limit_vfe_equ_mon_handle =
+                NV_PMU_PERF_RPC_VFE_EQU_MONITOR_COUNT_MAX;
+        pvolt_rail->ov_limit_vfe_equ_mon_handle =
+                NV_PMU_PERF_RPC_VFE_EQU_MONITOR_COUNT_MAX;
+
+        status = boardobjgrpmask_e32_init(&pvolt_rail->volt_dev_mask, NULL);
+        if (status) {
+                gk20a_err(dev_from_gk20a(g),
+                        "Failed to initialize BOARDOBJGRPMASK of VOLTAGE_DEVICEs");
+        }
+
+        return status;
+}
+
+static u32 volt_rail_init_pmudata_super(struct gk20a *g,
+        struct boardobj *board_obj_ptr, struct nv_pmu_boardobj *ppmudata)
+{
+        u32 status = 0;
+        struct voltage_rail *prail;
+        struct nv_pmu_volt_volt_rail_boardobj_set *rail_pmu_data;
+        u32 i;
+
+        gk20a_dbg_info("");
+
+        status = boardobj_pmudatainit_super(g, board_obj_ptr, ppmudata);
+        if (status)
+                return status;
+
+        prail = (struct voltage_rail *)board_obj_ptr;
+        rail_pmu_data = (struct nv_pmu_volt_volt_rail_boardobj_set *)
+                ppmudata;
+
+        rail_pmu_data->rel_limit_vfe_equ_idx = prail->rel_limit_vfe_equ_idx;
+        rail_pmu_data->alt_rel_limit_vfe_equ_idx =
+                        prail->alt_rel_limit_vfe_equ_idx;
+        rail_pmu_data->ov_limit_vfe_equ_idx = prail->ov_limit_vfe_equ_idx;
+        rail_pmu_data->vmin_limit_vfe_equ_idx = prail->vmin_limit_vfe_equ_idx;
+        rail_pmu_data->volt_margin_limit_vfe_equ_idx =
+                        prail->volt_margin_limit_vfe_equ_idx;
+        rail_pmu_data->pwr_equ_idx = prail->pwr_equ_idx;
+        rail_pmu_data->volt_dev_idx_default = prail->volt_dev_idx_default;
+
+        for (i = 0; i < CTRL_VOLT_RAIL_VOLT_DELTA_MAX_ENTRIES; i++) {
+                rail_pmu_data->volt_delta_uv[i] = prail->volt_delta_uv[i] +
+                        g->perf_pmu.volt.volt_rail_metadata.ext_rel_delta_uv[i];
+        }
+
+        status = boardobjgrpmask_export(&prail->volt_dev_mask.super,
+                                prail->volt_dev_mask.super.bitcount,
+                                &rail_pmu_data->volt_dev_mask.super);
+        if (status)
+                gk20a_err(dev_from_gk20a(g),
+                        "Failed to export BOARDOBJGRPMASK of VOLTAGE_DEVICEs");
+
+        gk20a_dbg_info("Done");
+
+        return status;
+}
+
+static struct voltage_rail *construct_volt_rail(struct gk20a *g, void *pargs)
+{
+        struct boardobj *board_obj_ptr = NULL;
+        struct voltage_rail *ptemp_rail = (struct voltage_rail *)pargs;
+        struct voltage_rail  *board_obj_volt_rail_ptr = NULL;
+        u32 status;
+
+        gk20a_dbg_info("");
+        status = boardobj_construct_super(g, &board_obj_ptr,
+                sizeof(struct voltage_rail), pargs);
+        if (status)
+                return NULL;
+
+        board_obj_volt_rail_ptr = (struct voltage_rail *)board_obj_ptr;
+        /* override super class interface */
+        board_obj_ptr->pmudatainit = volt_rail_init_pmudata_super;
+
+        board_obj_volt_rail_ptr->boot_voltage_uv =
+                        ptemp_rail->boot_voltage_uv;
+        board_obj_volt_rail_ptr->rel_limit_vfe_equ_idx =
+                        ptemp_rail->rel_limit_vfe_equ_idx;
+        board_obj_volt_rail_ptr->alt_rel_limit_vfe_equ_idx =
+                        ptemp_rail->alt_rel_limit_vfe_equ_idx;
+        board_obj_volt_rail_ptr->ov_limit_vfe_equ_idx =
+                        ptemp_rail->ov_limit_vfe_equ_idx;
+        board_obj_volt_rail_ptr->pwr_equ_idx =
+                        ptemp_rail->pwr_equ_idx;
+        board_obj_volt_rail_ptr->boot_volt_vfe_equ_idx =
+                        ptemp_rail->boot_volt_vfe_equ_idx;
+        board_obj_volt_rail_ptr->vmin_limit_vfe_equ_idx =
+                        ptemp_rail->vmin_limit_vfe_equ_idx;
+        board_obj_volt_rail_ptr->volt_margin_limit_vfe_equ_idx =
+                        ptemp_rail->volt_margin_limit_vfe_equ_idx;
+
+        gk20a_dbg_info("Done");
+
+        return (struct voltage_rail *)board_obj_ptr;
+}
+
+u8 volt_rail_vbios_volt_domain_convert_to_internal(struct gk20a *g,
+        u8 vbios_volt_domain)
+{
+        switch (g->perf_pmu.volt.volt_rail_metadata.volt_domain_hal) {
+        case CTRL_VOLT_DOMAIN_HAL_GP10X_SINGLE_RAIL:
+                if (vbios_volt_domain == 0)
+                        return CTRL_VOLT_DOMAIN_LOGIC;
+                break;
+        case CTRL_VOLT_DOMAIN_HAL_GP10X_SPLIT_RAIL:
+                switch (vbios_volt_domain) {
+                case 0:
+                        return CTRL_VOLT_DOMAIN_LOGIC;
+                case 1:
+                        return CTRL_VOLT_DOMAIN_SRAM;
+                }
+                break;
+        }
+
+        return CTRL_VOLT_DOMAIN_INVALID;
+}
+
+u32 volt_rail_pmu_setup(struct gk20a *g)
+{
+        u32 status;
+        struct boardobjgrp *pboardobjgrp = NULL;
+
+        gk20a_dbg_info("");
+
+        pboardobjgrp = &g->perf_pmu.volt.volt_rail_metadata.volt_rails.super;
+
+        if (!pboardobjgrp->bconstructed)
+                return -EINVAL;
+
+        status = pboardobjgrp->pmuinithandle(g, pboardobjgrp);
+
+        gk20a_dbg_info("Done");
+        return status;
+}
+
+static u32 volt_get_volt_rail_table(struct gk20a *g,
+                struct voltage_rail_metadata *pvolt_rail_metadata)
+{
+        u32 status = 0;
+        u8 *volt_rail_table_ptr = NULL;
+        struct voltage_rail *prail = NULL;
+        struct vbios_voltage_rail_table_1x_header header = { 0 };
+        struct vbios_voltage_rail_table_1x_entry entry = { 0 };
+        u8 i;
+        u8 volt_domain;
+        u8 *entry_ptr;
+        union rail_type {
+                struct boardobj board_obj;
+                struct voltage_rail volt_rail;
+        } rail_type_data;
+
+        if (g->ops.bios.get_perf_table_ptrs) {
+                volt_rail_table_ptr = (u8 *)g->ops.bios.get_perf_table_ptrs(g,
+                                g->bios.perf_token, VOLTAGE_RAIL_TABLE);
+                if (volt_rail_table_ptr == NULL) {
+                        status = -EINVAL;
+                        goto done;
+                }
+        } else {
+                status = -EINVAL;
+                goto done;
+        }
+
+        memcpy(&header, volt_rail_table_ptr,
+                        sizeof(struct vbios_voltage_rail_table_1x_header));
+
+        pvolt_rail_metadata->volt_domain_hal = (u8)header.volt_domain_hal;
+
+        for (i = 0; i < header.num_table_entries; i++) {
+                entry_ptr = (volt_rail_table_ptr + header.header_size +
+                        (i * header.table_entry_size));
+
+                memset(&rail_type_data, 0x0, sizeof(rail_type_data));
+
+                memcpy(&entry, entry_ptr,
+                        sizeof(struct vbios_voltage_rail_table_1x_entry));
+
+                volt_domain = volt_rail_vbios_volt_domain_convert_to_internal(g,
+                        i);
+                if (volt_domain == CTRL_VOLT_DOMAIN_INVALID)
+                        continue;
+
+                rail_type_data.board_obj.type = volt_domain;
+                rail_type_data.volt_rail.boot_voltage_uv =
+                        (u32)entry.boot_voltage_uv;
+                rail_type_data.volt_rail.rel_limit_vfe_equ_idx =
+                        (u8)entry.rel_limit_vfe_equ_idx;
+                rail_type_data.volt_rail.alt_rel_limit_vfe_equ_idx =
+                        (u8)entry.alt_rel_limit_vfe_equidx;
+                rail_type_data.volt_rail.ov_limit_vfe_equ_idx =
+                        (u8)entry.ov_limit_vfe_equ_idx;
+
+                if (header.table_entry_size >=
+                        NV_VBIOS_VOLTAGE_RAIL_1X_ENTRY_SIZE_0B)
+                        rail_type_data.volt_rail.volt_margin_limit_vfe_equ_idx =
+                                (u8)entry.volt_margin_limit_vfe_equ_idx;
+                else
+                        rail_type_data.volt_rail.volt_margin_limit_vfe_equ_idx =
+                                CTRL_BOARDOBJ_IDX_INVALID;
+
+                if (header.table_entry_size >=
+                        NV_VBIOS_VOLTAGE_RAIL_1X_ENTRY_SIZE_0A)
+                        rail_type_data.volt_rail.vmin_limit_vfe_equ_idx =
+                                (u8)entry.vmin_limit_vfe_equ_idx;
+                else
+                        rail_type_data.volt_rail.vmin_limit_vfe_equ_idx =
+                                CTRL_BOARDOBJ_IDX_INVALID;
+
+                if (header.table_entry_size >=
+                        NV_VBIOS_VOLTAGE_RAIL_1X_ENTRY_SIZE_09)
+                        rail_type_data.volt_rail.boot_volt_vfe_equ_idx =
+                                (u8)entry.boot_volt_vfe_equ_idx;
+                else
+                        rail_type_data.volt_rail.boot_volt_vfe_equ_idx =
+                                CTRL_BOARDOBJ_IDX_INVALID;
+
+                if (header.table_entry_size >=
+                        NV_VBIOS_VOLTAGE_RAIL_1X_ENTRY_SIZE_08)
+                        rail_type_data.volt_rail.pwr_equ_idx =
+                                (u8)entry.pwr_equ_idx;
+                else
+                        rail_type_data.volt_rail.pwr_equ_idx =
+                                CTRL_PMGR_PWR_EQUATION_INDEX_INVALID;
+
+                prail = construct_volt_rail(g, &rail_type_data);
+
+                status = boardobjgrp_objinsert(
+                                &pvolt_rail_metadata->volt_rails.super,
+                                (struct boardobj *)prail, i);
+        }
+
+done:
+        return status;
+}
+
+static u32 _volt_rail_devgrp_pmudata_instget(struct gk20a *g,
+        struct nv_pmu_boardobjgrp *pmuboardobjgrp, struct nv_pmu_boardobj
+        **ppboardobjpmudata, u8 idx)
+{
+        struct nv_pmu_volt_volt_rail_boardobj_grp_set *pgrp_set =
+                (struct nv_pmu_volt_volt_rail_boardobj_grp_set *)
+                pmuboardobjgrp;
+
+        gk20a_dbg_info("");
+
+        /*check whether pmuboardobjgrp has a valid boardobj in index*/
+        if (((u32)BIT(idx) &
+                pgrp_set->hdr.data.super.obj_mask.super.data[0]) == 0)
+                return -EINVAL;
+
+        *ppboardobjpmudata = (struct nv_pmu_boardobj *)
+                &pgrp_set->objects[idx].data.board_obj;
+        gk20a_dbg_info(" Done");
+        return 0;
+}
+
+static u32 _volt_rail_devgrp_pmustatus_instget(struct gk20a *g,
+        void *pboardobjgrppmu, struct nv_pmu_boardobj_query
+        **ppboardobjpmustatus, u8 idx)
+{
+        struct nv_pmu_volt_volt_rail_boardobj_grp_get_status *pgrp_get_status =
+                (struct nv_pmu_volt_volt_rail_boardobj_grp_get_status *)
+                pboardobjgrppmu;
+
+        /*check whether pmuboardobjgrp has a valid boardobj in index*/
+        if (((u32)BIT(idx) &
+                pgrp_get_status->hdr.data.super.obj_mask.super.data[0]) == 0)
+                return -EINVAL;
+
+        *ppboardobjpmustatus = (struct nv_pmu_boardobj_query *)
+                        &pgrp_get_status->objects[idx].data.board_obj;
+        return 0;
+}
+
+u32 volt_rail_sw_setup(struct gk20a *g)
+{
+        u32 status = 0;
+        struct boardobjgrp *pboardobjgrp = NULL;
+        struct voltage_rail *pvolt_rail;
+        u8 i;
+
+        gk20a_dbg_info("");
+
+        status = boardobjgrpconstruct_e32(&g->perf_pmu.volt.volt_rail_metadata.
+                        volt_rails);
+        if (status) {
+                gk20a_err(dev_from_gk20a(g),
+                        "error creating boardobjgrp for volt rail, status - 0x%x",
+                        status);
+                goto done;
+        }
+
+        pboardobjgrp = &g->perf_pmu.volt.volt_rail_metadata.volt_rails.super;
+
+        pboardobjgrp->pmudatainstget  = _volt_rail_devgrp_pmudata_instget;
+        pboardobjgrp->pmustatusinstget  = _volt_rail_devgrp_pmustatus_instget;
+
+        g->perf_pmu.volt.volt_rail_metadata.pct_delta =
+                        NV_PMU_VOLT_VALUE_0V_IN_UV;
+
+        /* Obtain Voltage Rail Table from VBIOS */
+        status = volt_get_volt_rail_table(g, &g->perf_pmu.volt.
+                        volt_rail_metadata);
+        if (status)
+                goto done;
+
+        /* Populate data for the VOLT_RAIL PMU interface */
+        BOARDOBJGRP_PMU_CONSTRUCT(pboardobjgrp, VOLT, VOLT_RAIL);
+
+        status = BOARDOBJGRP_PMU_CMD_GRP_SET_CONSTRUCT(g, pboardobjgrp,
+                        volt, VOLT, volt_rail, VOLT_RAIL);
+        if (status) {
+                gk20a_err(dev_from_gk20a(g),
+                        "error constructing PMU_BOARDOBJ_CMD_GRP_SET interface - 0x%x",
+                        status);
+                goto done;
+        }
+
+        status = BOARDOBJGRP_PMU_CMD_GRP_GET_STATUS_CONSTRUCT(g,
+                &g->perf_pmu.volt.volt_rail_metadata.volt_rails.super,
+                        volt, VOLT, volt_rail, VOLT_RAIL);
+        if (status) {
+                gk20a_err(dev_from_gk20a(g),
+                        "error constructing PMU_BOARDOBJ_CMD_GRP_SET interface - 0x%x",
+                        status);
+                goto done;
+        }
+
+        /* update calibration to fuse */
+        BOARDOBJGRP_FOR_EACH(&(g->perf_pmu.volt.volt_rail_metadata.
+                               volt_rails.super),
+                             struct voltage_rail *, pvolt_rail, i) {
+                status = volt_rail_state_init(g, pvolt_rail);
+                if (status) {
+                        gk20a_err(dev_from_gk20a(g),
+                                "Failure while executing RAIL's state init railIdx = %d",
+                                i);
+                        goto done;
+                }
+        }
+
+done:
+        gk20a_dbg_info(" done status %x", status);
+        return status;
+}