/*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __XVE_GP106_H__
#define __XVE_GP106_H__
#include "gk20a/gk20a.h"
#include <nvgpu/log2.h>
int gp106_init_xve_ops(struct gpu_ops *gops);
/*
* Best guess for a reasonable timeout.
*/
#define GPU_XVE_TIMEOUT_MS 500
/*
* For the available speeds bitmap.
*/
#define GPU_XVE_SPEED_2P5 (1 << 0)
#define GPU_XVE_SPEED_5P0 (1 << 1)
#define GPU_XVE_SPEED_8P0 (1 << 2)
#define GPU_XVE_NR_SPEEDS 3
#define GPU_XVE_SPEED_MASK (GPU_XVE_SPEED_2P5 | \
GPU_XVE_SPEED_5P0 | \
GPU_XVE_SPEED_8P0)
/*
* The HW uses a 2 bit field where speed is defined by a number:
*
* NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_2P5 = 1
* NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_5P0 = 2
* NV_XVE_LINK_CONTROL_STATUS_LINK_SPEED_8P0 = 3
*
* This isn't ideal for a bitmap with available speeds. So the external
* APIs think about speeds as a bit in a bitmap and this function converts
* from those bits to the actual HW speed setting.
*
* @speed_bit must have only 1 bit set and must be one of the 3 available
* HW speeds. Not all chips support all speeds so use available_speeds() to
* determine what a given chip supports.
*/
static inline u32 xve_speed_to_hw_speed_setting(u32 speed_bit)
{
if (!speed_bit ||
!is_power_of_2(speed_bit) ||
!(speed_bit & GPU_XVE_SPEED_MASK))
return -EINVAL;
return ilog2(speed_bit) + 1;
}
static inline const char *xve_speed_to_str(u32 speed)
{
if (!speed || !is_power_of_2(speed) ||
!(speed & GPU_XVE_SPEED_MASK))
return "Unknown ???";
return speed & GPU_XVE_SPEED_2P5 ? "Gen1" :
speed & GPU_XVE_SPEED_5P0 ? "Gen2" :
speed & GPU_XVE_SPEED_8P0 ? "Gen3" :
"Unknown ???";
}
/*
* Debugging for the speed change.
*/
enum xv_speed_change_steps {
PRE_CHANGE = 0,
DISABLE_ASPM,
DL_SAFE_MODE,
CHECK_LINK,
LINK_SETTINGS,
EXEC_CHANGE,
EXEC_VERIF,
CLEANUP
};
#define xv_dbg(fmt, args...) \
gk20a_dbg(gpu_dbg_xv, fmt, ##args)
#define xv_sc_dbg(step, fmt, args...) \
xv_dbg("[%d] %15s | " fmt, step, __stringify(step), ##args)
#endif
