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.
7 * Copyright (C) 2019 Advanced Micro Devices, Inc.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
15 * Copyright (C) 2019 Advanced Micro Devices, Inc.
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copy
23 * notice, this list of conditions and the following disclaimer in
24 * the documentation and/or other materials provided with the distribution.
25 * 3. Neither the name of AMD corporation nor the names of its
26 * contributors may be used to endorse or promote products derived
27 * from this software without specific prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 * Contact Information :
42 * Rajesh Kumar <rajesh1.kumar@amd.com>
50 #define NTB_HW_AMD_VENDOR_ID 0x1022
51 #define NTB_HW_AMD_DEVICE_ID 0x145B
53 #define NTB_DEF_PEER_CNT 1
54 #define NTB_DEF_PEER_IDX 0
56 #define BIT(n) (1 << n)
57 #define AMD_LINK_HB_TIMEOUT (1 * hz)
59 #define NTB_LIN_STA_ACTIVE_BIT 0x00000002
60 #define NTB_LNK_STA_SPEED_MASK 0x000F0000
61 #define NTB_LNK_STA_WIDTH_MASK 0x03F00000
62 #define NTB_LNK_STA_ACTIVE(x) (!!((x) & NTB_LIN_STA_ACTIVE_BIT))
63 #define NTB_LNK_STA_SPEED(x) (((x) & NTB_LNK_STA_SPEED_MASK) >> 16)
64 #define NTB_LNK_STA_WIDTH(x) (((x) & NTB_LNK_STA_WIDTH_MASK) >> 20)
66 #define amd_ntb_bar_read(SIZE, bar, offset) \
67 bus_space_read_ ## SIZE (ntb->bar_info[(bar)].pci_bus_tag, \
68 ntb->bar_info[(bar)].pci_bus_handle, (offset))
69 #define amd_ntb_bar_write(SIZE, bar, offset, val) \
70 bus_space_write_ ## SIZE (ntb->bar_info[(bar)].pci_bus_tag, \
71 ntb->bar_info[(bar)].pci_bus_handle, (offset), (val))
72 #define amd_ntb_reg_read(SIZE, offset) \
73 amd_ntb_bar_read(SIZE, NTB_CONFIG_BAR, offset)
74 #define amd_ntb_reg_write(SIZE, offset, val) \
75 amd_ntb_bar_write(SIZE, NTB_CONFIG_BAR, offset, val)
76 #define amd_ntb_peer_reg_read(SIZE, offset) \
77 amd_ntb_bar_read(SIZE, NTB_CONFIG_BAR, offset + AMD_PEER_OFFSET)
78 #define amd_ntb_peer_reg_write(SIZE, offset, val) \
79 amd_ntb_bar_write(SIZE, NTB_CONFIG_BAR, offset + AMD_PEER_OFFSET, val)
81 #define DB_MASK_LOCK(sc) mtx_lock_spin(&(sc)->db_mask_lock)
82 #define DB_MASK_UNLOCK(sc) mtx_unlock_spin(&(sc)->db_mask_lock)
83 #define DB_MASK_ASSERT(sc, f) mtx_assert(&(sc)->db_mask_lock, (f))
85 /* amd_ntb_conn_type are hardware numbers, cannot change. */
86 enum amd_ntb_conn_type {
92 enum ntb_default_port {
105 struct amd_ntb_hw_info {
110 struct amd_ntb_pci_bar_info {
111 bus_space_tag_t pci_bus_tag;
112 bus_space_handle_t pci_bus_handle;
113 struct resource *pci_resource;
117 vm_memattr_t map_mode;
120 /* Configuration register offsets */
125 struct amd_ntb_int_info {
126 struct resource *res;
132 struct amd_ntb_softc *ntb;
138 /* AMD NTB Capability */
141 AMD_MSIX_VECTOR_CNT = 24,
144 /* AMD NTB Link Status Offset */
145 AMD_LINK_STATUS_OFFSET = 0x68,
147 /* AMD NTB register offset */
148 AMD_CNTL_OFFSET = 0x200,
150 /* NTB control register bits */
151 PMM_REG_CTL = BIT(21),
152 SMM_REG_CTL = BIT(20),
153 SMM_REG_ACC_PATH = BIT(18),
154 PMM_REG_ACC_PATH = BIT(17),
155 NTB_CLK_EN = BIT(16),
157 AMD_STA_OFFSET = 0x204,
158 AMD_PGSLV_OFFSET = 0x208,
159 AMD_SPAD_MUX_OFFSET = 0x20C,
160 AMD_SPAD_OFFSET = 0x210,
161 AMD_RSMU_HCID = 0x250,
162 AMD_RSMU_SIID = 0x254,
163 AMD_PSION_OFFSET = 0x300,
164 AMD_SSION_OFFSET = 0x330,
165 AMD_MMINDEX_OFFSET = 0x400,
166 AMD_MMDATA_OFFSET = 0x404,
167 AMD_SIDEINFO_OFFSET = 0x408,
169 AMD_SIDE_MASK = BIT(0),
170 AMD_SIDE_READY = BIT(1),
173 AMD_ROMBARLMT_OFFSET = 0x410,
174 AMD_BAR1LMT_OFFSET = 0x414,
175 AMD_BAR23LMT_OFFSET = 0x418,
176 AMD_BAR45LMT_OFFSET = 0x420,
179 AMD_ROMBARXLAT_OFFSET = 0x428,
180 AMD_BAR1XLAT_OFFSET = 0x430,
181 AMD_BAR23XLAT_OFFSET = 0x438,
182 AMD_BAR45XLAT_OFFSET = 0x440,
184 /* doorbell and interrupt */
185 AMD_DBFM_OFFSET = 0x450,
186 AMD_DBREQ_OFFSET = 0x454,
187 AMD_MIRRDBSTAT_OFFSET = 0x458,
188 AMD_DBMASK_OFFSET = 0x45C,
189 AMD_DBSTAT_OFFSET = 0x460,
190 AMD_INTMASK_OFFSET = 0x470,
191 AMD_INTSTAT_OFFSET = 0x474,
194 AMD_PEER_FLUSH_EVENT = BIT(0),
195 AMD_PEER_RESET_EVENT = BIT(1),
196 AMD_PEER_D3_EVENT = BIT(2),
197 AMD_PEER_PMETO_EVENT = BIT(3),
198 AMD_PEER_D0_EVENT = BIT(4),
199 AMD_LINK_UP_EVENT = BIT(5),
200 AMD_LINK_DOWN_EVENT = BIT(6),
201 AMD_EVENT_INTMASK = (AMD_PEER_FLUSH_EVENT |
202 AMD_PEER_RESET_EVENT | AMD_PEER_D3_EVENT |
203 AMD_PEER_PMETO_EVENT | AMD_PEER_D0_EVENT |
204 AMD_LINK_UP_EVENT | AMD_LINK_DOWN_EVENT),
206 AMD_PMESTAT_OFFSET = 0x480,
207 AMD_PMSGTRIG_OFFSET = 0x490,
208 AMD_LTRLATENCY_OFFSET = 0x494,
209 AMD_FLUSHTRIG_OFFSET = 0x498,
212 AMD_SMUACK_OFFSET = 0x4A0,
213 AMD_SINRST_OFFSET = 0x4A4,
214 AMD_RSPNUM_OFFSET = 0x4A8,
215 AMD_SMU_SPADMUTEX = 0x4B0,
216 AMD_SMU_SPADOFFSET = 0x4B4,
218 AMD_PEER_OFFSET = 0x400,
221 struct amd_ntb_softc {
222 /* ntb.c context. Do not move! Must go first! */
226 enum amd_ntb_conn_type conn_type;
228 struct amd_ntb_pci_bar_info bar_info[NTB_MAX_BARS];
229 struct amd_ntb_int_info int_info[AMD_MSIX_VECTOR_CNT];
230 struct amd_ntb_vec *msix_vec;
231 uint16_t allocated_interrupts;
233 struct callout hb_timer;
238 uint8_t msix_vec_count;
240 struct mtx db_mask_lock;
242 volatile uint32_t ntb_ctl;
243 volatile uint32_t lnk_sta;
244 volatile uint32_t peer_sta;
245 volatile uint32_t cntl_sta;
247 uint16_t db_valid_mask;
251 unsigned int self_spad;
252 unsigned int peer_spad;
255 static void amd_init_side_info(struct amd_ntb_softc *ntb);
256 static void amd_deinit_side_info(struct amd_ntb_softc *ntb);
257 static int amd_ntb_detach(device_t device);