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/*
* 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;
adev->gmc.xgmi.node_id = psp_xgmi_get_node_id(&adev->psp);
adev->gmc.xgmi.hive_id = psp_xgmi_get_hive_id(&adev->psp);
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);
}
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