[linux-block.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_xgmi.c

/*
 * 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);
}
Commit	Line	Data
fb30fc59 SL	1	/*
	2	* Copyright 2018 Advanced Micro Devices, Inc.
	3	*
	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:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	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.
	21	*
	22	*
	23	*/
	24	#include <linux/list.h>
	25	#include "amdgpu.h"
5183411b	26	#include "amdgpu_xgmi.h"
fb30fc59 SL	27
	28
	29	static DEFINE_MUTEX(xgmi_mutex);
	30
	31	#define AMDGPU_MAX_XGMI_HIVE 8
	32	#define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE 4
	33
fb30fc59 SL	34	static struct amdgpu_hive_info xgmi_hives[AMDGPU_MAX_XGMI_HIVE];
	35	static unsigned hive_count = 0;
	36
ed2bf522 AG	37
	38	void amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info hive)
	39	{
	40	return &hive->device_list;
	41	}
	42
5183411b	43	struct amdgpu_hive_info amdgpu_get_xgmi_hive(struct amdgpu_device adev)
fb30fc59 SL	44	{
	45	int i;
	46	struct amdgpu_hive_info *tmp;
	47
	48	if (!adev->gmc.xgmi.hive_id)
	49	return NULL;
	50	for (i = 0 ; i < hive_count; ++i) {
	51	tmp = &xgmi_hives[i];
	52	if (tmp->hive_id == adev->gmc.xgmi.hive_id)
	53	return tmp;
	54	}
	55	if (i >= AMDGPU_MAX_XGMI_HIVE)
	56	return NULL;
	57
	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);
ed2bf522 AG	62	mutex_init(&tmp->hive_lock);
ed2bf522 AG	63
fb30fc59 SL	64	return tmp;
	65	}
	66
5183411b AG	67	int amdgpu_xgmi_update_topology(struct amdgpu_hive_info hive, struct amdgpu_device adev)
	68	{
	69	int ret = -EINVAL;
	70
	71	/* Each psp need to set the latest topology */
	72	ret = psp_xgmi_set_topology_info(&adev->psp,
	73	hive->number_devices,
	74	&hive->topology_info);
	75	if (ret)
	76	dev_err(adev->dev,
	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);
	80	else
5d66ef38	81	dev_info(adev->dev, "XGMI: Set topology for node %d, hive 0x%llx.\n",
5183411b AG	82	adev->gmc.xgmi.physical_node_id,
	83	adev->gmc.xgmi.hive_id);
	84
	85	return ret;
	86	}
	87
fb30fc59 SL	88	int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
fb30fc59 SL	89	{
5183411b	90	struct psp_xgmi_topology_info *hive_topology;
fb30fc59 SL	91	struct amdgpu_hive_info *hive;
fb30fc59 SL	92	struct amdgpu_xgmi *entry;
5183411b	93	struct amdgpu_device *tmp_adev = NULL;
fb30fc59 SL	94
	95	int count = 0, ret = -EINVAL;
	96
47622ba0	97	if (!adev->gmc.xgmi.supported)
fb30fc59	98	return 0;
47622ba0	99
dd3c45d3	100	adev->gmc.xgmi.node_id = psp_xgmi_get_node_id(&adev->psp);
fb30fc59 SL	101	adev->gmc.xgmi.hive_id = psp_xgmi_get_hive_id(&adev->psp);
fb30fc59 SL	102
fb30fc59 SL	103	mutex_lock(&xgmi_mutex);
	104	hive = amdgpu_get_xgmi_hive(adev);
	105	if (!hive)
	106	goto exit;
	107
5183411b AG	108	hive_topology = &hive->topology_info;
5183411b AG	109
fb30fc59 SL	110	list_add_tail(&adev->gmc.xgmi.head, &hive->device_list);
fb30fc59 SL	111	list_for_each_entry(entry, &hive->device_list, head)
5183411b AG	112	hive_topology->nodes[count++].node_id = entry->node_id;
5183411b AG	113	hive->number_devices = count;
fb30fc59	114
a82c1566	115	/* Each psp need to get the latest topology */
a82c1566	116	list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
5183411b	117	ret = psp_xgmi_get_topology_info(&tmp_adev->psp, count, hive_topology);
a82c1566	118	if (ret) {
	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 */
	124	break;
	125	}
fb30fc59	126	}
a82c1566	127
fb30fc59	128	list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
5183411b AG	129	ret = amdgpu_xgmi_update_topology(hive, tmp_adev);
5183411b AG	130	if (ret)
fb30fc59	131	break;
fb30fc59	132	}
fb30fc59 SL	133
	134	exit:
	135	mutex_unlock(&xgmi_mutex);
	136	return ret;
	137	}
a82400b5 AG	138
	139	void amdgpu_xgmi_remove_device(struct amdgpu_device *adev)
	140	{
	141	struct amdgpu_hive_info *hive;
	142
	143	if (!adev->gmc.xgmi.supported)
	144	return;
	145
	146	mutex_lock(&xgmi_mutex);
	147
	148	hive = amdgpu_get_xgmi_hive(adev);
	149	if (!hive)
	150	goto exit;
	151
	152	if (!(hive->number_devices--))
	153	mutex_destroy(&hive->hive_lock);
	154
	155	exit:
	156	mutex_unlock(&xgmi_mutex);
	157	}