| /* |
| * Copyright 2018 Advanced Micro Devices, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * |
| */ |
| #include <linux/list.h> |
| #include "amdgpu.h" |
| #include "amdgpu_xgmi.h" |
| |
| |
| static DEFINE_MUTEX(xgmi_mutex); |
| |
| #define AMDGPU_MAX_XGMI_HIVE 8 |
| #define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE 4 |
| |
| static struct amdgpu_hive_info xgmi_hives[AMDGPU_MAX_XGMI_HIVE]; |
| static unsigned hive_count = 0; |
| |
| |
| void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive) |
| { |
| return &hive->device_list; |
| } |
| |
| struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev) |
| { |
| int i; |
| struct amdgpu_hive_info *tmp; |
| |
| if (!adev->gmc.xgmi.hive_id) |
| return NULL; |
| for (i = 0 ; i < hive_count; ++i) { |
| tmp = &xgmi_hives[i]; |
| if (tmp->hive_id == adev->gmc.xgmi.hive_id) |
| return tmp; |
| } |
| if (i >= AMDGPU_MAX_XGMI_HIVE) |
| return NULL; |
| |
| /* initialize new hive if not exist */ |
| tmp = &xgmi_hives[hive_count++]; |
| tmp->hive_id = adev->gmc.xgmi.hive_id; |
| INIT_LIST_HEAD(&tmp->device_list); |
| mutex_init(&tmp->hive_lock); |
| |
| return tmp; |
| } |
| |
| int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev) |
| { |
| int ret = -EINVAL; |
| |
| /* Each psp need to set the latest topology */ |
| ret = psp_xgmi_set_topology_info(&adev->psp, |
| hive->number_devices, |
| &hive->topology_info); |
| if (ret) |
| dev_err(adev->dev, |
| "XGMI: Set topology failure on device %llx, hive %llx, ret %d", |
| adev->gmc.xgmi.node_id, |
| adev->gmc.xgmi.hive_id, ret); |
| else |
| dev_info(adev->dev, "XGMI: Set topology for node %d, hive 0x%llx.\n", |
| adev->gmc.xgmi.physical_node_id, |
| adev->gmc.xgmi.hive_id); |
| |
| return ret; |
| } |
| |
| int amdgpu_xgmi_add_device(struct amdgpu_device *adev) |
| { |
| struct psp_xgmi_topology_info *hive_topology; |
| struct amdgpu_hive_info *hive; |
| struct amdgpu_xgmi *entry; |
| struct amdgpu_device *tmp_adev = NULL; |
| |
| int count = 0, ret = -EINVAL; |
| |
| if (!adev->gmc.xgmi.supported) |
| return 0; |
| |
| ret = psp_xgmi_get_node_id(&adev->psp, &adev->gmc.xgmi.node_id); |
| if (ret) { |
| dev_err(adev->dev, |
| "XGMI: Failed to get node id\n"); |
| return ret; |
| } |
| |
| ret = psp_xgmi_get_hive_id(&adev->psp, &adev->gmc.xgmi.hive_id); |
| if (ret) { |
| dev_err(adev->dev, |
| "XGMI: Failed to get hive id\n"); |
| return ret; |
| } |
| |
| mutex_lock(&xgmi_mutex); |
| hive = amdgpu_get_xgmi_hive(adev); |
| if (!hive) |
| goto exit; |
| |
| hive_topology = &hive->topology_info; |
| |
| list_add_tail(&adev->gmc.xgmi.head, &hive->device_list); |
| list_for_each_entry(entry, &hive->device_list, head) |
| hive_topology->nodes[count++].node_id = entry->node_id; |
| hive->number_devices = count; |
| |
| /* Each psp need to get the latest topology */ |
| list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) { |
| ret = psp_xgmi_get_topology_info(&tmp_adev->psp, count, hive_topology); |
| if (ret) { |
| dev_err(tmp_adev->dev, |
| "XGMI: Get topology failure on device %llx, hive %llx, ret %d", |
| tmp_adev->gmc.xgmi.node_id, |
| tmp_adev->gmc.xgmi.hive_id, ret); |
| /* To do : continue with some node failed or disable the whole hive */ |
| break; |
| } |
| } |
| |
| list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) { |
| ret = amdgpu_xgmi_update_topology(hive, tmp_adev); |
| if (ret) |
| break; |
| } |
| |
| exit: |
| mutex_unlock(&xgmi_mutex); |
| return ret; |
| } |
| |
| void amdgpu_xgmi_remove_device(struct amdgpu_device *adev) |
| { |
| struct amdgpu_hive_info *hive; |
| |
| if (!adev->gmc.xgmi.supported) |
| return; |
| |
| mutex_lock(&xgmi_mutex); |
| |
| hive = amdgpu_get_xgmi_hive(adev); |
| if (!hive) |
| goto exit; |
| |
| if (!(hive->number_devices--)) |
| mutex_destroy(&hive->hive_lock); |
| |
| exit: |
| mutex_unlock(&xgmi_mutex); |
| } |