/*
* This file is provided under a dual BSD / GPLv2 license . When using or
* redistributing this file , you may do so under either license .
*
* GPL LICENSE SUMMARY
*
* Copyright ( C ) 2016 Advanced Micro Devices , Inc . All Rights Reserved .
*
* This program is free software ; you can redistribute it and / or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation .
*
* BSD LICENSE
*
* Copyright ( C ) 2016 Advanced Micro Devices , Inc . All Rights Reserved .
*
* Redistribution and use in source and binary forms , with or without
* modification , are permitted provided that the following conditions
* are met :
*
* * Redistributions of source code must retain the above copyright
* notice , this list of conditions and the following disclaimer .
* * Redistributions in binary form must reproduce the above copy
* notice , this list of conditions and the following disclaimer in
* the documentation and / or other materials provided with the
* distribution .
* * Neither the name of AMD Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission .
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* " AS IS " AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT
* LIMITED TO , THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED . IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT , INDIRECT , INCIDENTAL ,
* SPECIAL , EXEMPLARY , OR CONSEQUENTIAL DAMAGES ( INCLUDING , BUT NOT
* LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES ; LOSS OF USE ,
* DATA , OR PROFITS ; OR BUSINESS INTERRUPTION ) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT LIABILITY , OR TORT
* ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE .
*
* AMD PCIe NTB Linux driver
*
* Contact Information :
* Xiangliang Yu < Xiangliang . Yu @ amd . com >
*/
#ifndef NTB_HW_AMD_H
#define NTB_HW_AMD_H
#include <linux/ntb.h>
#include <linux/pci.h>
#define AMD_LINK_HB_TIMEOUT msecs_to_jiffies(1000 )
#define NTB_LNK_STA_SPEED_MASK 0 x000F0000
#define NTB_LNK_STA_WIDTH_MASK 0 x03F00000
#define NTB_LNK_STA_SPEED(x) (((x) & NTB_LNK_STA_SPEED_MASK) >> 16 )
#define NTB_LNK_STA_WIDTH(x) (((x) & NTB_LNK_STA_WIDTH_MASK) >> 20 )
#ifndef read64
#ifdef readq
#define read64 readq
#else
#define read64 _read64
static inline u64 _read64(void __iomem *mmio)
{
u64 low, high;
low = readl(mmio);
high = readl(mmio + sizeof (u32));
return low | (high << 32 );
}
#endif
#endif
#ifndef write64
#ifdef writeq
#define write64 writeq
#else
#define write64 _write64
static inline void _write64(u64 val, void __iomem *mmio)
{
writel(val, mmio);
writel(val >> 32 , mmio + sizeof (u32));
}
#endif
#endif
enum {
/* AMD NTB Capability */
AMD_DB_CNT = 16 ,
AMD_MSIX_VECTOR_CNT = 24 ,
AMD_SPADS_CNT = 16 ,
/* AMD NTB register offset */
AMD_CNTL_OFFSET = 0 x200,
/* NTB control register bits */
PMM_REG_CTL = BIT(21 ),
SMM_REG_CTL = BIT(20 ),
SMM_REG_ACC_PATH = BIT(18 ),
PMM_REG_ACC_PATH = BIT(17 ),
NTB_CLK_EN = BIT(16 ),
AMD_STA_OFFSET = 0 x204,
AMD_PGSLV_OFFSET = 0 x208,
AMD_SPAD_MUX_OFFSET = 0 x20C,
AMD_SPAD_OFFSET = 0 x210,
AMD_RSMU_HCID = 0 x250,
AMD_RSMU_SIID = 0 x254,
AMD_PSION_OFFSET = 0 x300,
AMD_SSION_OFFSET = 0 x330,
AMD_MMINDEX_OFFSET = 0 x400,
AMD_MMDATA_OFFSET = 0 x404,
AMD_SIDEINFO_OFFSET = 0 x408,
AMD_SIDE_MASK = BIT(0 ),
AMD_SIDE_READY = BIT(1 ),
/* limit register */
AMD_ROMBARLMT_OFFSET = 0 x410,
AMD_BAR1LMT_OFFSET = 0 x414,
AMD_BAR23LMT_OFFSET = 0 x418,
AMD_BAR45LMT_OFFSET = 0 x420,
/* xlat address */
AMD_POMBARXLAT_OFFSET = 0 x428,
AMD_BAR1XLAT_OFFSET = 0 x430,
AMD_BAR23XLAT_OFFSET = 0 x438,
AMD_BAR45XLAT_OFFSET = 0 x440,
/* doorbell and interrupt */
AMD_DBFM_OFFSET = 0 x450,
AMD_DBREQ_OFFSET = 0 x454,
AMD_MIRRDBSTAT_OFFSET = 0 x458,
AMD_DBMASK_OFFSET = 0 x45C,
AMD_DBSTAT_OFFSET = 0 x460,
AMD_INTMASK_OFFSET = 0 x470,
AMD_INTSTAT_OFFSET = 0 x474,
/* event type */
AMD_PEER_FLUSH_EVENT = BIT(0 ),
AMD_PEER_RESET_EVENT = BIT(1 ),
AMD_PEER_D3_EVENT = BIT(2 ),
AMD_PEER_PMETO_EVENT = BIT(3 ),
AMD_PEER_D0_EVENT = BIT(4 ),
AMD_LINK_UP_EVENT = BIT(5 ),
AMD_LINK_DOWN_EVENT = BIT(6 ),
AMD_EVENT_INTMASK = (AMD_PEER_FLUSH_EVENT |
AMD_PEER_RESET_EVENT | AMD_PEER_D3_EVENT |
AMD_PEER_PMETO_EVENT | AMD_PEER_D0_EVENT |
AMD_LINK_UP_EVENT | AMD_LINK_DOWN_EVENT),
AMD_PMESTAT_OFFSET = 0 x480,
AMD_PMSGTRIG_OFFSET = 0 x490,
AMD_LTRLATENCY_OFFSET = 0 x494,
AMD_FLUSHTRIG_OFFSET = 0 x498,
/* SMU register*/
AMD_SMUACK_OFFSET = 0 x4A0,
AMD_SINRST_OFFSET = 0 x4A4,
AMD_RSPNUM_OFFSET = 0 x4A8,
AMD_SMU_SPADMUTEX = 0 x4B0,
AMD_SMU_SPADOFFSET = 0 x4B4,
AMD_PEER_OFFSET = 0 x400,
};
struct ntb_dev_data {
const unsigned char mw_count;
const unsigned int mw_idx;
};
struct amd_ntb_dev;
struct amd_ntb_vec {
struct amd_ntb_dev *ndev;
int num;
};
struct amd_ntb_dev {
struct ntb_dev ntb;
u32 ntb_side;
u32 lnk_sta;
u32 cntl_sta;
u32 peer_sta;
struct ntb_dev_data *dev_data;
unsigned char mw_count;
unsigned char spad_count;
unsigned char db_count;
unsigned char msix_vec_count;
u64 db_valid_mask;
u64 db_mask;
u64 db_last_bit;
u32 int_mask;
struct msix_entry *msix;
struct amd_ntb_vec *vec;
/* synchronize rmw access of db_mask and hw reg */
spinlock_t db_mask_lock;
void __iomem *self_mmio;
void __iomem *peer_mmio;
unsigned int self_spad;
unsigned int peer_spad;
struct delayed_work hb_timer;
struct dentry *debugfs_dir;
struct dentry *debugfs_info;
};
#define ntb_ndev(__ntb) container_of(__ntb, struct amd_ntb_dev, ntb)
#define hb_ndev(__work) container_of(__work, struct amd_ntb_dev, hb_timer.work)
static void amd_set_side_info_reg(struct amd_ntb_dev *ndev, bool peer);
static void amd_clear_side_info_reg(struct amd_ntb_dev *ndev, bool peer);
static int amd_poll_link(struct amd_ntb_dev *ndev);
#endif
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