2 * Copyright 2018 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
24 #include <linux/list.h>
26 #include "amdgpu_xgmi.h"
29 static DEFINE_MUTEX(xgmi_mutex);
31 #define AMDGPU_MAX_XGMI_HIVE 8
32 #define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE 4
34 static struct amdgpu_hive_info xgmi_hives[AMDGPU_MAX_XGMI_HIVE];
35 static unsigned hive_count = 0;
38 void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive)
40 return &hive->device_list;
43 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev)
46 struct amdgpu_hive_info *tmp;
48 if (!adev->gmc.xgmi.hive_id)
50 for (i = 0 ; i < hive_count; ++i) {
52 if (tmp->hive_id == adev->gmc.xgmi.hive_id)
55 if (i >= AMDGPU_MAX_XGMI_HIVE)
58 /* initialize new hive if not exist */
59 tmp = &xgmi_hives[hive_count++];
60 tmp->hive_id = adev->gmc.xgmi.hive_id;
61 INIT_LIST_HEAD(&tmp->device_list);
62 mutex_init(&tmp->hive_lock);
67 int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev)
71 /* Each psp need to set the latest topology */
72 ret = psp_xgmi_set_topology_info(&adev->psp,
74 &hive->topology_info);
77 "XGMI: Set topology failure on device %llx, hive %llx, ret %d",
78 adev->gmc.xgmi.node_id,
79 adev->gmc.xgmi.hive_id, ret);
81 dev_info(adev->dev, "XGMI: Set topology for node %d, hive 0x%llx.\n",
82 adev->gmc.xgmi.physical_node_id,
83 adev->gmc.xgmi.hive_id);
88 int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
90 struct psp_xgmi_topology_info *hive_topology;
91 struct amdgpu_hive_info *hive;
92 struct amdgpu_xgmi *entry;
93 struct amdgpu_device *tmp_adev = NULL;
95 int count = 0, ret = -EINVAL;
97 if (!adev->gmc.xgmi.supported)
100 adev->gmc.xgmi.node_id = psp_xgmi_get_node_id(&adev->psp);
101 adev->gmc.xgmi.hive_id = psp_xgmi_get_hive_id(&adev->psp);
103 mutex_lock(&xgmi_mutex);
104 hive = amdgpu_get_xgmi_hive(adev);
108 hive_topology = &hive->topology_info;
110 list_add_tail(&adev->gmc.xgmi.head, &hive->device_list);
111 list_for_each_entry(entry, &hive->device_list, head)
112 hive_topology->nodes[count++].node_id = entry->node_id;
113 hive->number_devices = count;
115 /* Each psp need to get the latest topology */
116 list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
117 ret = psp_xgmi_get_topology_info(&tmp_adev->psp, count, hive_topology);
119 dev_err(tmp_adev->dev,
120 "XGMI: Get topology failure on device %llx, hive %llx, ret %d",
121 tmp_adev->gmc.xgmi.node_id,
122 tmp_adev->gmc.xgmi.hive_id, ret);
123 /* To do : continue with some node failed or disable the whole hive */
128 list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
129 ret = amdgpu_xgmi_update_topology(hive, tmp_adev);
135 mutex_unlock(&xgmi_mutex);
139 void amdgpu_xgmi_remove_device(struct amdgpu_device *adev)
141 struct amdgpu_hive_info *hive;
143 if (!adev->gmc.xgmi.supported)
146 mutex_lock(&xgmi_mutex);
148 hive = amdgpu_get_xgmi_hive(adev);
152 if (!(hive->number_devices--))
153 mutex_destroy(&hive->hive_lock);
156 mutex_unlock(&xgmi_mutex);