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/*
* Copyright 2015 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <linux/types.h>
#include "atom-types.h"
#include "atombios.h"
#include "pppcielanes.h"
/** \file
* Functions related to PCIe lane changes.
*/
/* For converting from number of lanes to lane bits. */
static const unsigned char pp_r600_encode_lanes[] = {
0, /* 0 Not Supported */
1, /* 1 Lane */
2, /* 2 Lanes */
0, /* 3 Not Supported */
3, /* 4 Lanes */
0, /* 5 Not Supported */
0, /* 6 Not Supported */
0, /* 7 Not Supported */
4, /* 8 Lanes */
0, /* 9 Not Supported */
0, /* 10 Not Supported */
0, /* 11 Not Supported */
5, /* 12 Lanes (Not actually supported) */
0, /* 13 Not Supported */
0, /* 14 Not Supported */
0, /* 15 Not Supported */
6 /* 16 Lanes */
};
static const unsigned char pp_r600_decoded_lanes[8] = { 16, 1, 2, 4, 8, 12, 16, };
uint8_t encode_pcie_lane_width(uint32_t num_lanes)
{
return pp_r600_encode_lanes[num_lanes];
}
uint8_t decode_pcie_lane_width(uint32_t num_lanes)
{
return pp_r600_decoded_lanes[num_lanes];
}
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