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1/*
2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2012 Intel Corporation. All rights reserved.
8 * Copyright (C) 2015 EMC Corporation. All Rights Reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * BSD LICENSE
15 *
16 * Copyright(c) 2012 Intel Corporation. All rights reserved.
17 * Copyright (C) 2015 EMC Corporation. All Rights Reserved.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 *
23 * * Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * * Redistributions in binary form must reproduce the above copy
26 * notice, this list of conditions and the following disclaimer in
27 * the documentation and/or other materials provided with the
28 * distribution.
29 * * Neither the name of Intel Corporation nor the names of its
30 * contributors may be used to endorse or promote products derived
31 * from this software without specific prior written permission.
32 *
33 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
34 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
35 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
36 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
37 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
40 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
41 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
43 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44 *
45 * Intel PCIe NTB Linux driver
46 */
47
48#ifndef NTB_HW_INTEL_H
49#define NTB_HW_INTEL_H
50
51#include <linux/ntb.h>
52#include <linux/pci.h>
53#include <linux/io-64-nonatomic-lo-hi.h>
54
55/* PCI device IDs */
56#define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF 0x3725
57#define PCI_DEVICE_ID_INTEL_NTB_PS_JSF 0x3726
58#define PCI_DEVICE_ID_INTEL_NTB_SS_JSF 0x3727
59#define PCI_DEVICE_ID_INTEL_NTB_B2B_SNB 0x3C0D
60#define PCI_DEVICE_ID_INTEL_NTB_PS_SNB 0x3C0E
61#define PCI_DEVICE_ID_INTEL_NTB_SS_SNB 0x3C0F
62#define PCI_DEVICE_ID_INTEL_NTB_B2B_IVT 0x0E0D
63#define PCI_DEVICE_ID_INTEL_NTB_PS_IVT 0x0E0E
64#define PCI_DEVICE_ID_INTEL_NTB_SS_IVT 0x0E0F
65#define PCI_DEVICE_ID_INTEL_NTB_B2B_HSX 0x2F0D
66#define PCI_DEVICE_ID_INTEL_NTB_PS_HSX 0x2F0E
67#define PCI_DEVICE_ID_INTEL_NTB_SS_HSX 0x2F0F
68#define PCI_DEVICE_ID_INTEL_NTB_B2B_BDX 0x6F0D
69#define PCI_DEVICE_ID_INTEL_NTB_PS_BDX 0x6F0E
70#define PCI_DEVICE_ID_INTEL_NTB_SS_BDX 0x6F0F
71#define PCI_DEVICE_ID_INTEL_NTB_B2B_SKX 0x201C
72#define PCI_DEVICE_ID_INTEL_NTB_B2B_ICX 0x347e
73#define PCI_DEVICE_ID_INTEL_NTB_B2B_GNR 0x0db4
74
75/* Ntb control and link status */
76#define NTB_CTL_CFG_LOCK BIT(0)
77#define NTB_CTL_DISABLE BIT(1)
78#define NTB_CTL_S2P_BAR2_SNOOP BIT(2)
79#define NTB_CTL_P2S_BAR2_SNOOP BIT(4)
80#define NTB_CTL_S2P_BAR4_SNOOP BIT(6)
81#define NTB_CTL_P2S_BAR4_SNOOP BIT(8)
82#define NTB_CTL_S2P_BAR5_SNOOP BIT(12)
83#define NTB_CTL_P2S_BAR5_SNOOP BIT(14)
84
85#define NTB_LNK_STA_ACTIVE_BIT 0x2000
86#define NTB_LNK_STA_SPEED_MASK 0x000f
87#define NTB_LNK_STA_WIDTH_MASK 0x03f0
88#define NTB_LNK_STA_ACTIVE(x) (!!((x) & NTB_LNK_STA_ACTIVE_BIT))
89#define NTB_LNK_STA_SPEED(x) ((x) & NTB_LNK_STA_SPEED_MASK)
90#define NTB_LNK_STA_WIDTH(x) (((x) & NTB_LNK_STA_WIDTH_MASK) >> 4)
91
92/* flags to indicate unsafe api */
93#define NTB_UNSAFE_DB BIT_ULL(0)
94#define NTB_UNSAFE_SPAD BIT_ULL(1)
95
96#define NTB_BAR_MASK_64 ~(0xfull)
97#define NTB_BAR_MASK_32 ~(0xfu)
98
99struct intel_ntb_dev;
100
101struct intel_ntb_reg {
102 int (*poll_link)(struct intel_ntb_dev *ndev);
103 int (*link_is_up)(struct intel_ntb_dev *ndev);
104 u64 (*db_ioread)(const void __iomem *mmio);
105 void (*db_iowrite)(u64 db_bits, void __iomem *mmio);
106 unsigned long ntb_ctl;
107 resource_size_t db_size;
108 int mw_bar[];
109};
110
111struct intel_ntb_alt_reg {
112 unsigned long db_bell;
113 unsigned long db_mask;
114 unsigned long db_clear;
115 unsigned long spad;
116};
117
118struct intel_ntb_xlat_reg {
119 unsigned long bar0_base;
120 unsigned long bar2_xlat;
121 unsigned long bar2_limit;
122 unsigned short bar2_idx;
123};
124
125struct intel_b2b_addr {
126 phys_addr_t bar0_addr;
127 phys_addr_t bar2_addr64;
128 phys_addr_t bar4_addr64;
129 phys_addr_t bar4_addr32;
130 phys_addr_t bar5_addr32;
131};
132
133struct intel_ntb_vec {
134 struct intel_ntb_dev *ndev;
135 int num;
136};
137
138struct intel_ntb_dev {
139 struct ntb_dev ntb;
140
141 /* offset of peer bar0 in b2b bar */
142 unsigned long b2b_off;
143 /* mw idx used to access peer bar0 */
144 unsigned int b2b_idx;
145
146 /* BAR45 is split into BAR4 and BAR5 */
147 bool bar4_split;
148
149 u32 ntb_ctl;
150 u32 lnk_sta;
151
152 unsigned char mw_count;
153 unsigned char spad_count;
154 unsigned char db_count;
155 unsigned char db_vec_count;
156 unsigned char db_vec_shift;
157
158 u64 db_valid_mask;
159 u64 db_link_mask;
160 u64 db_mask;
161
162 /* synchronize rmw access of db_mask and hw reg */
163 spinlock_t db_mask_lock;
164
165 struct msix_entry *msix;
166 struct intel_ntb_vec *vec;
167
168 const struct intel_ntb_reg *reg;
169 const struct intel_ntb_alt_reg *self_reg;
170 const struct intel_ntb_alt_reg *peer_reg;
171 const struct intel_ntb_xlat_reg *xlat_reg;
172 void __iomem *self_mmio;
173 void __iomem *peer_mmio;
174 phys_addr_t peer_addr;
175
176 unsigned long last_ts;
177 struct delayed_work hb_timer;
178
179 unsigned long hwerr_flags;
180 unsigned long unsafe_flags;
181 unsigned long unsafe_flags_ignore;
182
183 struct dentry *debugfs_dir;
184 struct dentry *debugfs_info;
185
186 /* gen4 entries */
187 int dev_up;
188};
189
190#define ntb_ndev(__ntb) container_of(__ntb, struct intel_ntb_dev, ntb)
191#define hb_ndev(__work) container_of(__work, struct intel_ntb_dev, \
192 hb_timer.work)
193
194static inline int pdev_is_gen1(struct pci_dev *pdev)
195{
196 switch (pdev->device) {
197 case PCI_DEVICE_ID_INTEL_NTB_SS_JSF:
198 case PCI_DEVICE_ID_INTEL_NTB_SS_SNB:
199 case PCI_DEVICE_ID_INTEL_NTB_SS_IVT:
200 case PCI_DEVICE_ID_INTEL_NTB_SS_HSX:
201 case PCI_DEVICE_ID_INTEL_NTB_SS_BDX:
202 case PCI_DEVICE_ID_INTEL_NTB_PS_JSF:
203 case PCI_DEVICE_ID_INTEL_NTB_PS_SNB:
204 case PCI_DEVICE_ID_INTEL_NTB_PS_IVT:
205 case PCI_DEVICE_ID_INTEL_NTB_PS_HSX:
206 case PCI_DEVICE_ID_INTEL_NTB_PS_BDX:
207 case PCI_DEVICE_ID_INTEL_NTB_B2B_JSF:
208 case PCI_DEVICE_ID_INTEL_NTB_B2B_SNB:
209 case PCI_DEVICE_ID_INTEL_NTB_B2B_IVT:
210 case PCI_DEVICE_ID_INTEL_NTB_B2B_HSX:
211 case PCI_DEVICE_ID_INTEL_NTB_B2B_BDX:
212 return 1;
213 }
214 return 0;
215}
216
217static inline int pdev_is_gen3(struct pci_dev *pdev)
218{
219 if (pdev->device == PCI_DEVICE_ID_INTEL_NTB_B2B_SKX)
220 return 1;
221
222 return 0;
223}
224
225static inline int pdev_is_gen4(struct pci_dev *pdev)
226{
227 if (pdev->device == PCI_DEVICE_ID_INTEL_NTB_B2B_ICX)
228 return 1;
229
230 return 0;
231}
232
233static inline int pdev_is_gen5(struct pci_dev *pdev)
234{
235 return pdev->device == PCI_DEVICE_ID_INTEL_NTB_B2B_GNR;
236}
237
238#endif
1/*
2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2012 Intel Corporation. All rights reserved.
8 * Copyright (C) 2015 EMC Corporation. All Rights Reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * BSD LICENSE
15 *
16 * Copyright(c) 2012 Intel Corporation. All rights reserved.
17 * Copyright (C) 2015 EMC Corporation. All Rights Reserved.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 *
23 * * Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * * Redistributions in binary form must reproduce the above copy
26 * notice, this list of conditions and the following disclaimer in
27 * the documentation and/or other materials provided with the
28 * distribution.
29 * * Neither the name of Intel Corporation nor the names of its
30 * contributors may be used to endorse or promote products derived
31 * from this software without specific prior written permission.
32 *
33 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
34 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
35 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
36 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
37 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
40 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
41 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
43 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44 *
45 * Intel PCIe NTB Linux driver
46 *
47 * Contact Information:
48 * Jon Mason <jon.mason@intel.com>
49 */
50
51#ifndef NTB_HW_INTEL_H
52#define NTB_HW_INTEL_H
53
54#include <linux/ntb.h>
55#include <linux/pci.h>
56
57#define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF 0x3725
58#define PCI_DEVICE_ID_INTEL_NTB_PS_JSF 0x3726
59#define PCI_DEVICE_ID_INTEL_NTB_SS_JSF 0x3727
60#define PCI_DEVICE_ID_INTEL_NTB_B2B_SNB 0x3C0D
61#define PCI_DEVICE_ID_INTEL_NTB_PS_SNB 0x3C0E
62#define PCI_DEVICE_ID_INTEL_NTB_SS_SNB 0x3C0F
63#define PCI_DEVICE_ID_INTEL_NTB_B2B_IVT 0x0E0D
64#define PCI_DEVICE_ID_INTEL_NTB_PS_IVT 0x0E0E
65#define PCI_DEVICE_ID_INTEL_NTB_SS_IVT 0x0E0F
66#define PCI_DEVICE_ID_INTEL_NTB_B2B_HSX 0x2F0D
67#define PCI_DEVICE_ID_INTEL_NTB_PS_HSX 0x2F0E
68#define PCI_DEVICE_ID_INTEL_NTB_SS_HSX 0x2F0F
69#define PCI_DEVICE_ID_INTEL_NTB_B2B_BDX 0x6F0D
70#define PCI_DEVICE_ID_INTEL_NTB_PS_BDX 0x6F0E
71#define PCI_DEVICE_ID_INTEL_NTB_SS_BDX 0x6F0F
72#define PCI_DEVICE_ID_INTEL_NTB_B2B_SKX 0x201C
73
74/* Intel Xeon hardware */
75
76#define XEON_PBAR23LMT_OFFSET 0x0000
77#define XEON_PBAR45LMT_OFFSET 0x0008
78#define XEON_PBAR4LMT_OFFSET 0x0008
79#define XEON_PBAR5LMT_OFFSET 0x000c
80#define XEON_PBAR23XLAT_OFFSET 0x0010
81#define XEON_PBAR45XLAT_OFFSET 0x0018
82#define XEON_PBAR4XLAT_OFFSET 0x0018
83#define XEON_PBAR5XLAT_OFFSET 0x001c
84#define XEON_SBAR23LMT_OFFSET 0x0020
85#define XEON_SBAR45LMT_OFFSET 0x0028
86#define XEON_SBAR4LMT_OFFSET 0x0028
87#define XEON_SBAR5LMT_OFFSET 0x002c
88#define XEON_SBAR23XLAT_OFFSET 0x0030
89#define XEON_SBAR45XLAT_OFFSET 0x0038
90#define XEON_SBAR4XLAT_OFFSET 0x0038
91#define XEON_SBAR5XLAT_OFFSET 0x003c
92#define XEON_SBAR0BASE_OFFSET 0x0040
93#define XEON_SBAR23BASE_OFFSET 0x0048
94#define XEON_SBAR45BASE_OFFSET 0x0050
95#define XEON_SBAR4BASE_OFFSET 0x0050
96#define XEON_SBAR5BASE_OFFSET 0x0054
97#define XEON_SBDF_OFFSET 0x005c
98#define XEON_NTBCNTL_OFFSET 0x0058
99#define XEON_PDOORBELL_OFFSET 0x0060
100#define XEON_PDBMSK_OFFSET 0x0062
101#define XEON_SDOORBELL_OFFSET 0x0064
102#define XEON_SDBMSK_OFFSET 0x0066
103#define XEON_USMEMMISS_OFFSET 0x0070
104#define XEON_SPAD_OFFSET 0x0080
105#define XEON_PBAR23SZ_OFFSET 0x00d0
106#define XEON_PBAR45SZ_OFFSET 0x00d1
107#define XEON_PBAR4SZ_OFFSET 0x00d1
108#define XEON_SBAR23SZ_OFFSET 0x00d2
109#define XEON_SBAR45SZ_OFFSET 0x00d3
110#define XEON_SBAR4SZ_OFFSET 0x00d3
111#define XEON_PPD_OFFSET 0x00d4
112#define XEON_PBAR5SZ_OFFSET 0x00d5
113#define XEON_SBAR5SZ_OFFSET 0x00d6
114#define XEON_WCCNTRL_OFFSET 0x00e0
115#define XEON_UNCERRSTS_OFFSET 0x014c
116#define XEON_CORERRSTS_OFFSET 0x0158
117#define XEON_LINK_STATUS_OFFSET 0x01a2
118#define XEON_SPCICMD_OFFSET 0x0504
119#define XEON_DEVCTRL_OFFSET 0x0598
120#define XEON_DEVSTS_OFFSET 0x059a
121#define XEON_SLINK_STATUS_OFFSET 0x05a2
122#define XEON_B2B_SPAD_OFFSET 0x0100
123#define XEON_B2B_DOORBELL_OFFSET 0x0140
124#define XEON_B2B_XLAT_OFFSETL 0x0144
125#define XEON_B2B_XLAT_OFFSETU 0x0148
126#define XEON_PPD_CONN_MASK 0x03
127#define XEON_PPD_CONN_TRANSPARENT 0x00
128#define XEON_PPD_CONN_B2B 0x01
129#define XEON_PPD_CONN_RP 0x02
130#define XEON_PPD_DEV_MASK 0x10
131#define XEON_PPD_DEV_USD 0x00
132#define XEON_PPD_DEV_DSD 0x10
133#define XEON_PPD_SPLIT_BAR_MASK 0x40
134
135#define XEON_PPD_TOPO_MASK (XEON_PPD_CONN_MASK | XEON_PPD_DEV_MASK)
136#define XEON_PPD_TOPO_PRI_USD (XEON_PPD_CONN_RP | XEON_PPD_DEV_USD)
137#define XEON_PPD_TOPO_PRI_DSD (XEON_PPD_CONN_RP | XEON_PPD_DEV_DSD)
138#define XEON_PPD_TOPO_SEC_USD (XEON_PPD_CONN_TRANSPARENT | XEON_PPD_DEV_USD)
139#define XEON_PPD_TOPO_SEC_DSD (XEON_PPD_CONN_TRANSPARENT | XEON_PPD_DEV_DSD)
140#define XEON_PPD_TOPO_B2B_USD (XEON_PPD_CONN_B2B | XEON_PPD_DEV_USD)
141#define XEON_PPD_TOPO_B2B_DSD (XEON_PPD_CONN_B2B | XEON_PPD_DEV_DSD)
142
143#define XEON_MW_COUNT 2
144#define HSX_SPLIT_BAR_MW_COUNT 3
145#define XEON_DB_COUNT 15
146#define XEON_DB_LINK 15
147#define XEON_DB_LINK_BIT BIT_ULL(XEON_DB_LINK)
148#define XEON_DB_MSIX_VECTOR_COUNT 4
149#define XEON_DB_MSIX_VECTOR_SHIFT 5
150#define XEON_DB_TOTAL_SHIFT 16
151#define XEON_SPAD_COUNT 16
152
153/* Intel Skylake Xeon hardware */
154#define SKX_IMBAR1SZ_OFFSET 0x00d0
155#define SKX_IMBAR2SZ_OFFSET 0x00d1
156#define SKX_EMBAR1SZ_OFFSET 0x00d2
157#define SKX_EMBAR2SZ_OFFSET 0x00d3
158#define SKX_DEVCTRL_OFFSET 0x0098
159#define SKX_DEVSTS_OFFSET 0x009a
160#define SKX_UNCERRSTS_OFFSET 0x014c
161#define SKX_CORERRSTS_OFFSET 0x0158
162#define SKX_LINK_STATUS_OFFSET 0x01a2
163
164#define SKX_NTBCNTL_OFFSET 0x0000
165#define SKX_IMBAR1XBASE_OFFSET 0x0010 /* SBAR2XLAT */
166#define SKX_IMBAR1XLMT_OFFSET 0x0018 /* SBAR2LMT */
167#define SKX_IMBAR2XBASE_OFFSET 0x0020 /* SBAR4XLAT */
168#define SKX_IMBAR2XLMT_OFFSET 0x0028 /* SBAR4LMT */
169#define SKX_IM_INT_STATUS_OFFSET 0x0040
170#define SKX_IM_INT_DISABLE_OFFSET 0x0048
171#define SKX_IM_SPAD_OFFSET 0x0080 /* SPAD */
172#define SKX_USMEMMISS_OFFSET 0x0070
173#define SKX_INTVEC_OFFSET 0x00d0
174#define SKX_IM_DOORBELL_OFFSET 0x0100 /* SDOORBELL0 */
175#define SKX_B2B_SPAD_OFFSET 0x0180 /* B2B SPAD */
176#define SKX_EMBAR0XBASE_OFFSET 0x4008 /* B2B_XLAT */
177#define SKX_EMBAR1XBASE_OFFSET 0x4010 /* PBAR2XLAT */
178#define SKX_EMBAR1XLMT_OFFSET 0x4018 /* PBAR2LMT */
179#define SKX_EMBAR2XBASE_OFFSET 0x4020 /* PBAR4XLAT */
180#define SKX_EMBAR2XLMT_OFFSET 0x4028 /* PBAR4LMT */
181#define SKX_EM_INT_STATUS_OFFSET 0x4040
182#define SKX_EM_INT_DISABLE_OFFSET 0x4048
183#define SKX_EM_SPAD_OFFSET 0x4080 /* remote SPAD */
184#define SKX_EM_DOORBELL_OFFSET 0x4100 /* PDOORBELL0 */
185#define SKX_SPCICMD_OFFSET 0x4504 /* SPCICMD */
186#define SKX_EMBAR0_OFFSET 0x4510 /* SBAR0BASE */
187#define SKX_EMBAR1_OFFSET 0x4518 /* SBAR23BASE */
188#define SKX_EMBAR2_OFFSET 0x4520 /* SBAR45BASE */
189
190#define SKX_DB_COUNT 32
191#define SKX_DB_LINK 32
192#define SKX_DB_LINK_BIT BIT_ULL(SKX_DB_LINK)
193#define SKX_DB_MSIX_VECTOR_COUNT 33
194#define SKX_DB_MSIX_VECTOR_SHIFT 1
195#define SKX_DB_TOTAL_SHIFT 33
196#define SKX_SPAD_COUNT 16
197
198/* Ntb control and link status */
199
200#define NTB_CTL_CFG_LOCK BIT(0)
201#define NTB_CTL_DISABLE BIT(1)
202#define NTB_CTL_S2P_BAR2_SNOOP BIT(2)
203#define NTB_CTL_P2S_BAR2_SNOOP BIT(4)
204#define NTB_CTL_S2P_BAR4_SNOOP BIT(6)
205#define NTB_CTL_P2S_BAR4_SNOOP BIT(8)
206#define NTB_CTL_S2P_BAR5_SNOOP BIT(12)
207#define NTB_CTL_P2S_BAR5_SNOOP BIT(14)
208
209#define NTB_LNK_STA_ACTIVE_BIT 0x2000
210#define NTB_LNK_STA_SPEED_MASK 0x000f
211#define NTB_LNK_STA_WIDTH_MASK 0x03f0
212#define NTB_LNK_STA_ACTIVE(x) (!!((x) & NTB_LNK_STA_ACTIVE_BIT))
213#define NTB_LNK_STA_SPEED(x) ((x) & NTB_LNK_STA_SPEED_MASK)
214#define NTB_LNK_STA_WIDTH(x) (((x) & NTB_LNK_STA_WIDTH_MASK) >> 4)
215
216/* Use the following addresses for translation between b2b ntb devices in case
217 * the hardware default values are not reliable. */
218#define XEON_B2B_BAR0_ADDR 0x1000000000000000ull
219#define XEON_B2B_BAR2_ADDR64 0x2000000000000000ull
220#define XEON_B2B_BAR4_ADDR64 0x4000000000000000ull
221#define XEON_B2B_BAR4_ADDR32 0x20000000u
222#define XEON_B2B_BAR5_ADDR32 0x40000000u
223
224/* The peer ntb secondary config space is 32KB fixed size */
225#define XEON_B2B_MIN_SIZE 0x8000
226
227/* flags to indicate hardware errata */
228#define NTB_HWERR_SDOORBELL_LOCKUP BIT_ULL(0)
229#define NTB_HWERR_SB01BASE_LOCKUP BIT_ULL(1)
230#define NTB_HWERR_B2BDOORBELL_BIT14 BIT_ULL(2)
231#define NTB_HWERR_MSIX_VECTOR32_BAD BIT_ULL(3)
232
233/* flags to indicate unsafe api */
234#define NTB_UNSAFE_DB BIT_ULL(0)
235#define NTB_UNSAFE_SPAD BIT_ULL(1)
236
237#define NTB_BAR_MASK_64 ~(0xfull)
238#define NTB_BAR_MASK_32 ~(0xfu)
239
240struct intel_ntb_dev;
241
242struct intel_ntb_reg {
243 int (*poll_link)(struct intel_ntb_dev *ndev);
244 int (*link_is_up)(struct intel_ntb_dev *ndev);
245 u64 (*db_ioread)(void __iomem *mmio);
246 void (*db_iowrite)(u64 db_bits, void __iomem *mmio);
247 unsigned long ntb_ctl;
248 resource_size_t db_size;
249 int mw_bar[];
250};
251
252struct intel_ntb_alt_reg {
253 unsigned long db_bell;
254 unsigned long db_mask;
255 unsigned long db_clear;
256 unsigned long spad;
257};
258
259struct intel_ntb_xlat_reg {
260 unsigned long bar0_base;
261 unsigned long bar2_xlat;
262 unsigned long bar2_limit;
263};
264
265struct intel_b2b_addr {
266 phys_addr_t bar0_addr;
267 phys_addr_t bar2_addr64;
268 phys_addr_t bar4_addr64;
269 phys_addr_t bar4_addr32;
270 phys_addr_t bar5_addr32;
271};
272
273struct intel_ntb_vec {
274 struct intel_ntb_dev *ndev;
275 int num;
276};
277
278struct intel_ntb_dev {
279 struct ntb_dev ntb;
280
281 /* offset of peer bar0 in b2b bar */
282 unsigned long b2b_off;
283 /* mw idx used to access peer bar0 */
284 unsigned int b2b_idx;
285
286 /* BAR45 is split into BAR4 and BAR5 */
287 bool bar4_split;
288
289 u32 ntb_ctl;
290 u32 lnk_sta;
291
292 unsigned char mw_count;
293 unsigned char spad_count;
294 unsigned char db_count;
295 unsigned char db_vec_count;
296 unsigned char db_vec_shift;
297
298 u64 db_valid_mask;
299 u64 db_link_mask;
300 u64 db_mask;
301
302 /* synchronize rmw access of db_mask and hw reg */
303 spinlock_t db_mask_lock;
304
305 struct msix_entry *msix;
306 struct intel_ntb_vec *vec;
307
308 const struct intel_ntb_reg *reg;
309 const struct intel_ntb_alt_reg *self_reg;
310 const struct intel_ntb_alt_reg *peer_reg;
311 const struct intel_ntb_xlat_reg *xlat_reg;
312 void __iomem *self_mmio;
313 void __iomem *peer_mmio;
314 phys_addr_t peer_addr;
315
316 unsigned long last_ts;
317 struct delayed_work hb_timer;
318
319 unsigned long hwerr_flags;
320 unsigned long unsafe_flags;
321 unsigned long unsafe_flags_ignore;
322
323 struct dentry *debugfs_dir;
324 struct dentry *debugfs_info;
325};
326
327#define ntb_ndev(__ntb) container_of(__ntb, struct intel_ntb_dev, ntb)
328#define hb_ndev(__work) container_of(__work, struct intel_ntb_dev, \
329 hb_timer.work)
330
331#endif