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/*
* 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) 2012 Intel Corporation. All rights reserved.
* Copyright (C) 2015 EMC Corporation. 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) 2012 Intel Corporation. All rights reserved.
* Copyright (C) 2015 EMC Corporation. 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 Intel 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.
*
* Intel PCIe NTB Linux driver
*
* Contact Information:
* Jon Mason <jon.mason@intel.com>
*/
#ifndef NTB_HW_INTEL_H
#define NTB_HW_INTEL_H
#include <linux/ntb.h>
#include <linux/pci.h>
#define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF 0x3725
#define PCI_DEVICE_ID_INTEL_NTB_PS_JSF 0x3726
#define PCI_DEVICE_ID_INTEL_NTB_SS_JSF 0x3727
#define PCI_DEVICE_ID_INTEL_NTB_B2B_SNB 0x3C0D
#define PCI_DEVICE_ID_INTEL_NTB_PS_SNB 0x3C0E
#define PCI_DEVICE_ID_INTEL_NTB_SS_SNB 0x3C0F
#define PCI_DEVICE_ID_INTEL_NTB_B2B_IVT 0x0E0D
#define PCI_DEVICE_ID_INTEL_NTB_PS_IVT 0x0E0E
#define PCI_DEVICE_ID_INTEL_NTB_SS_IVT 0x0E0F
#define PCI_DEVICE_ID_INTEL_NTB_B2B_HSX 0x2F0D
#define PCI_DEVICE_ID_INTEL_NTB_PS_HSX 0x2F0E
#define PCI_DEVICE_ID_INTEL_NTB_SS_HSX 0x2F0F
#define PCI_DEVICE_ID_INTEL_NTB_B2B_BDX 0x6F0D
#define PCI_DEVICE_ID_INTEL_NTB_PS_BDX 0x6F0E
#define PCI_DEVICE_ID_INTEL_NTB_SS_BDX 0x6F0F
#define PCI_DEVICE_ID_INTEL_NTB_B2B_SKX 0x201C
/* Intel Xeon hardware */
#define XEON_PBAR23LMT_OFFSET 0x0000
#define XEON_PBAR45LMT_OFFSET 0x0008
#define XEON_PBAR4LMT_OFFSET 0x0008
#define XEON_PBAR5LMT_OFFSET 0x000c
#define XEON_PBAR23XLAT_OFFSET 0x0010
#define XEON_PBAR45XLAT_OFFSET 0x0018
#define XEON_PBAR4XLAT_OFFSET 0x0018
#define XEON_PBAR5XLAT_OFFSET 0x001c
#define XEON_SBAR23LMT_OFFSET 0x0020
#define XEON_SBAR45LMT_OFFSET 0x0028
#define XEON_SBAR4LMT_OFFSET 0x0028
#define XEON_SBAR5LMT_OFFSET 0x002c
#define XEON_SBAR23XLAT_OFFSET 0x0030
#define XEON_SBAR45XLAT_OFFSET 0x0038
#define XEON_SBAR4XLAT_OFFSET 0x0038
#define XEON_SBAR5XLAT_OFFSET 0x003c
#define XEON_SBAR0BASE_OFFSET 0x0040
#define XEON_SBAR23BASE_OFFSET 0x0048
#define XEON_SBAR45BASE_OFFSET 0x0050
#define XEON_SBAR4BASE_OFFSET 0x0050
#define XEON_SBAR5BASE_OFFSET 0x0054
#define XEON_SBDF_OFFSET 0x005c
#define XEON_NTBCNTL_OFFSET 0x0058
#define XEON_PDOORBELL_OFFSET 0x0060
#define XEON_PDBMSK_OFFSET 0x0062
#define XEON_SDOORBELL_OFFSET 0x0064
#define XEON_SDBMSK_OFFSET 0x0066
#define XEON_USMEMMISS_OFFSET 0x0070
#define XEON_SPAD_OFFSET 0x0080
#define XEON_PBAR23SZ_OFFSET 0x00d0
#define XEON_PBAR45SZ_OFFSET 0x00d1
#define XEON_PBAR4SZ_OFFSET 0x00d1
#define XEON_SBAR23SZ_OFFSET 0x00d2
#define XEON_SBAR45SZ_OFFSET 0x00d3
#define XEON_SBAR4SZ_OFFSET 0x00d3
#define XEON_PPD_OFFSET 0x00d4
#define XEON_PBAR5SZ_OFFSET 0x00d5
#define XEON_SBAR5SZ_OFFSET 0x00d6
#define XEON_WCCNTRL_OFFSET 0x00e0
#define XEON_UNCERRSTS_OFFSET 0x014c
#define XEON_CORERRSTS_OFFSET 0x0158
#define XEON_LINK_STATUS_OFFSET 0x01a2
#define XEON_SPCICMD_OFFSET 0x0504
#define XEON_DEVCTRL_OFFSET 0x0598
#define XEON_DEVSTS_OFFSET 0x059a
#define XEON_SLINK_STATUS_OFFSET 0x05a2
#define XEON_B2B_SPAD_OFFSET 0x0100
#define XEON_B2B_DOORBELL_OFFSET 0x0140
#define XEON_B2B_XLAT_OFFSETL 0x0144
#define XEON_B2B_XLAT_OFFSETU 0x0148
#define XEON_PPD_CONN_MASK 0x03
#define XEON_PPD_CONN_TRANSPARENT 0x00
#define XEON_PPD_CONN_B2B 0x01
#define XEON_PPD_CONN_RP 0x02
#define XEON_PPD_DEV_MASK 0x10
#define XEON_PPD_DEV_USD 0x00
#define XEON_PPD_DEV_DSD 0x10
#define XEON_PPD_SPLIT_BAR_MASK 0x40
#define XEON_PPD_TOPO_MASK (XEON_PPD_CONN_MASK | XEON_PPD_DEV_MASK)
#define XEON_PPD_TOPO_PRI_USD (XEON_PPD_CONN_RP | XEON_PPD_DEV_USD)
#define XEON_PPD_TOPO_PRI_DSD (XEON_PPD_CONN_RP | XEON_PPD_DEV_DSD)
#define XEON_PPD_TOPO_SEC_USD (XEON_PPD_CONN_TRANSPARENT | XEON_PPD_DEV_USD)
#define XEON_PPD_TOPO_SEC_DSD (XEON_PPD_CONN_TRANSPARENT | XEON_PPD_DEV_DSD)
#define XEON_PPD_TOPO_B2B_USD (XEON_PPD_CONN_B2B | XEON_PPD_DEV_USD)
#define XEON_PPD_TOPO_B2B_DSD (XEON_PPD_CONN_B2B | XEON_PPD_DEV_DSD)
#define XEON_MW_COUNT 2
#define HSX_SPLIT_BAR_MW_COUNT 3
#define XEON_DB_COUNT 15
#define XEON_DB_LINK 15
#define XEON_DB_LINK_BIT BIT_ULL(XEON_DB_LINK)
#define XEON_DB_MSIX_VECTOR_COUNT 4
#define XEON_DB_MSIX_VECTOR_SHIFT 5
#define XEON_DB_TOTAL_SHIFT 16
#define XEON_SPAD_COUNT 16
/* Intel Skylake Xeon hardware */
#define SKX_IMBAR1SZ_OFFSET 0x00d0
#define SKX_IMBAR2SZ_OFFSET 0x00d1
#define SKX_EMBAR1SZ_OFFSET 0x00d2
#define SKX_EMBAR2SZ_OFFSET 0x00d3
#define SKX_DEVCTRL_OFFSET 0x0098
#define SKX_DEVSTS_OFFSET 0x009a
#define SKX_UNCERRSTS_OFFSET 0x014c
#define SKX_CORERRSTS_OFFSET 0x0158
#define SKX_LINK_STATUS_OFFSET 0x01a2
#define SKX_NTBCNTL_OFFSET 0x0000
#define SKX_IMBAR1XBASE_OFFSET 0x0010 /* SBAR2XLAT */
#define SKX_IMBAR1XLMT_OFFSET 0x0018 /* SBAR2LMT */
#define SKX_IMBAR2XBASE_OFFSET 0x0020 /* SBAR4XLAT */
#define SKX_IMBAR2XLMT_OFFSET 0x0028 /* SBAR4LMT */
#define SKX_IM_INT_STATUS_OFFSET 0x0040
#define SKX_IM_INT_DISABLE_OFFSET 0x0048
#define SKX_IM_SPAD_OFFSET 0x0080 /* SPAD */
#define SKX_USMEMMISS_OFFSET 0x0070
#define SKX_INTVEC_OFFSET 0x00d0
#define SKX_IM_DOORBELL_OFFSET 0x0100 /* SDOORBELL0 */
#define SKX_B2B_SPAD_OFFSET 0x0180 /* B2B SPAD */
#define SKX_EMBAR0XBASE_OFFSET 0x4008 /* B2B_XLAT */
#define SKX_EMBAR1XBASE_OFFSET 0x4010 /* PBAR2XLAT */
#define SKX_EMBAR1XLMT_OFFSET 0x4018 /* PBAR2LMT */
#define SKX_EMBAR2XBASE_OFFSET 0x4020 /* PBAR4XLAT */
#define SKX_EMBAR2XLMT_OFFSET 0x4028 /* PBAR4LMT */
#define SKX_EM_INT_STATUS_OFFSET 0x4040
#define SKX_EM_INT_DISABLE_OFFSET 0x4048
#define SKX_EM_SPAD_OFFSET 0x4080 /* remote SPAD */
#define SKX_EM_DOORBELL_OFFSET 0x4100 /* PDOORBELL0 */
#define SKX_SPCICMD_OFFSET 0x4504 /* SPCICMD */
#define SKX_EMBAR0_OFFSET 0x4510 /* SBAR0BASE */
#define SKX_EMBAR1_OFFSET 0x4518 /* SBAR23BASE */
#define SKX_EMBAR2_OFFSET 0x4520 /* SBAR45BASE */
#define SKX_DB_COUNT 32
#define SKX_DB_LINK 32
#define SKX_DB_LINK_BIT BIT_ULL(SKX_DB_LINK)
#define SKX_DB_MSIX_VECTOR_COUNT 33
#define SKX_DB_MSIX_VECTOR_SHIFT 1
#define SKX_DB_TOTAL_SHIFT 33
#define SKX_SPAD_COUNT 16
/* Ntb control and link status */
#define NTB_CTL_CFG_LOCK BIT(0)
#define NTB_CTL_DISABLE BIT(1)
#define NTB_CTL_S2P_BAR2_SNOOP BIT(2)
#define NTB_CTL_P2S_BAR2_SNOOP BIT(4)
#define NTB_CTL_S2P_BAR4_SNOOP BIT(6)
#define NTB_CTL_P2S_BAR4_SNOOP BIT(8)
#define NTB_CTL_S2P_BAR5_SNOOP BIT(12)
#define NTB_CTL_P2S_BAR5_SNOOP BIT(14)
#define NTB_LNK_STA_ACTIVE_BIT 0x2000
#define NTB_LNK_STA_SPEED_MASK 0x000f
#define NTB_LNK_STA_WIDTH_MASK 0x03f0
#define NTB_LNK_STA_ACTIVE(x) (!!((x) & NTB_LNK_STA_ACTIVE_BIT))
#define NTB_LNK_STA_SPEED(x) ((x) & NTB_LNK_STA_SPEED_MASK)
#define NTB_LNK_STA_WIDTH(x) (((x) & NTB_LNK_STA_WIDTH_MASK) >> 4)
/* Use the following addresses for translation between b2b ntb devices in case
* the hardware default values are not reliable. */
#define XEON_B2B_BAR0_ADDR 0x1000000000000000ull
#define XEON_B2B_BAR2_ADDR64 0x2000000000000000ull
#define XEON_B2B_BAR4_ADDR64 0x4000000000000000ull
#define XEON_B2B_BAR4_ADDR32 0x20000000u
#define XEON_B2B_BAR5_ADDR32 0x40000000u
/* The peer ntb secondary config space is 32KB fixed size */
#define XEON_B2B_MIN_SIZE 0x8000
/* flags to indicate hardware errata */
#define NTB_HWERR_SDOORBELL_LOCKUP BIT_ULL(0)
#define NTB_HWERR_SB01BASE_LOCKUP BIT_ULL(1)
#define NTB_HWERR_B2BDOORBELL_BIT14 BIT_ULL(2)
#define NTB_HWERR_MSIX_VECTOR32_BAD BIT_ULL(3)
/* flags to indicate unsafe api */
#define NTB_UNSAFE_DB BIT_ULL(0)
#define NTB_UNSAFE_SPAD BIT_ULL(1)
#define NTB_BAR_MASK_64 ~(0xfull)
#define NTB_BAR_MASK_32 ~(0xfu)
struct intel_ntb_dev;
struct intel_ntb_reg {
int (*poll_link)(struct intel_ntb_dev *ndev);
int (*link_is_up)(struct intel_ntb_dev *ndev);
u64 (*db_ioread)(void __iomem *mmio);
void (*db_iowrite)(u64 db_bits, void __iomem *mmio);
unsigned long ntb_ctl;
resource_size_t db_size;
int mw_bar[];
};
struct intel_ntb_alt_reg {
unsigned long db_bell;
unsigned long db_mask;
unsigned long db_clear;
unsigned long spad;
};
struct intel_ntb_xlat_reg {
unsigned long bar0_base;
unsigned long bar2_xlat;
unsigned long bar2_limit;
};
struct intel_b2b_addr {
phys_addr_t bar0_addr;
phys_addr_t bar2_addr64;
phys_addr_t bar4_addr64;
phys_addr_t bar4_addr32;
phys_addr_t bar5_addr32;
};
struct intel_ntb_vec {
struct intel_ntb_dev *ndev;
int num;
};
struct intel_ntb_dev {
struct ntb_dev ntb;
/* offset of peer bar0 in b2b bar */
unsigned long b2b_off;
/* mw idx used to access peer bar0 */
unsigned int b2b_idx;
/* BAR45 is split into BAR4 and BAR5 */
bool bar4_split;
u32 ntb_ctl;
u32 lnk_sta;
unsigned char mw_count;
unsigned char spad_count;
unsigned char db_count;
unsigned char db_vec_count;
unsigned char db_vec_shift;
u64 db_valid_mask;
u64 db_link_mask;
u64 db_mask;
/* synchronize rmw access of db_mask and hw reg */
spinlock_t db_mask_lock;
struct msix_entry *msix;
struct intel_ntb_vec *vec;
const struct intel_ntb_reg *reg;
const struct intel_ntb_alt_reg *self_reg;
const struct intel_ntb_alt_reg *peer_reg;
const struct intel_ntb_xlat_reg *xlat_reg;
void __iomem *self_mmio;
void __iomem *peer_mmio;
phys_addr_t peer_addr;
unsigned long last_ts;
struct delayed_work hb_timer;
unsigned long hwerr_flags;
unsigned long unsafe_flags;
unsigned long unsafe_flags_ignore;
struct dentry *debugfs_dir;
struct dentry *debugfs_info;
};
#define ntb_ndev(__ntb) container_of(__ntb, struct intel_ntb_dev, ntb)
#define hb_ndev(__work) container_of(__work, struct intel_ntb_dev, \
hb_timer.work)
#endif
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