drm/amdgpu : Generate XGMI topology info from driver level

Driver will save an array of XGMI hive info, each hive will have a list of devices
that have the same hive ID.
Signed-off-by: Shaoyun Liu <Shaoyun.Liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -53,7 +53,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
 	amdgpu_ucode.o amdgpu_bo_list.o amdgpu_ctx.o amdgpu_sync.o \
 	amdgpu_gtt_mgr.o amdgpu_vram_mgr.o amdgpu_virt.o amdgpu_atomfirmware.o \
 	amdgpu_vf_error.o amdgpu_sched.o amdgpu_debugfs.o amdgpu_ids.o \
-	amdgpu_gmc.o
+	amdgpu_gmc.o amdgpu_xgmi.o
 
 # add asic specific block
 amdgpu-$(CONFIG_DRM_AMDGPU_CIK)+= cik.o cik_ih.o kv_smc.o kv_dpm.o \

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1216,6 +1216,12 @@ void amdgpu_disable_vblank_kms(struct drm_device *dev, unsigned int pipe);
 long amdgpu_kms_compat_ioctl(struct file *filp, unsigned int cmd,
 			     unsigned long arg);
 
+
+/*
+ * functions used by amdgpu_xgmi.c
+ */
+int amdgpu_xgmi_add_device(struct amdgpu_device *adev);
+
 /*
  * functions used by amdgpu_encoder.c
  */

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -1586,6 +1586,7 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 		adev->ip_blocks[i].status.hw = true;
 	}
 
+	amdgpu_xgmi_add_device(adev);
 	amdgpu_amdkfd_device_init(adev);
 
 	if (amdgpu_sriov_vf(adev))

drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h

@@ -97,6 +97,8 @@ struct amdgpu_xgmi {
 	unsigned physical_node_id;
 	/* number of nodes (0-4) */
 	unsigned num_physical_nodes;
+	/* gpu list in the same hive */
+	struct list_head head;
 };
 
 struct amdgpu_gmc {

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_psp.h"
+
+
+static DEFINE_MUTEX(xgmi_mutex);
+
+#define AMDGPU_MAX_XGMI_HIVE			8
+#define AMDGPU_MAX_XGMI_DEVICE_PER_HIVE		4
+
+struct amdgpu_hive_info {
+	uint64_t		hive_id;
+	struct list_head	device_list;
+};
+
+static struct amdgpu_hive_info xgmi_hives[AMDGPU_MAX_XGMI_HIVE];
+static unsigned hive_count = 0;
+
+static 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);
+	return tmp;
+}
+
+int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
+{
+	struct psp_xgmi_topology_info tmp_topology[AMDGPU_MAX_XGMI_DEVICE_PER_HIVE];
+	struct amdgpu_hive_info *hive;
+	struct amdgpu_xgmi	*entry;
+	struct amdgpu_device 	*tmp_adev;
+
+	int count = 0, ret = -EINVAL;
+
+	if ((adev->asic_type < CHIP_VEGA20) ||
+		(adev->flags & AMD_IS_APU) )
+		return 0;
+	adev->gmc.xgmi.device_id = psp_xgmi_get_device_id(&adev->psp);
+	adev->gmc.xgmi.hive_id = psp_xgmi_get_hive_id(&adev->psp);
+
+	memset(&tmp_topology[0], 0, sizeof(tmp_topology));
+	mutex_lock(&xgmi_mutex);
+	hive = amdgpu_get_xgmi_hive(adev);
+	if (!hive)
+		goto exit;
+
+	list_add_tail(&adev->gmc.xgmi.head, &hive->device_list);
+	list_for_each_entry(entry, &hive->device_list, head)
+		tmp_topology[count++].device_id = entry->device_id;
+
+	ret = psp_xgmi_get_topology_info(&adev->psp, count, tmp_topology);
+	if (ret) {
+		dev_err(adev->dev,
+			"XGMI: Get topology failure on device %llx, hive %llx, ret %d",
+			adev->gmc.xgmi.device_id,
+			adev->gmc.xgmi.hive_id, ret);
+		goto exit;
+	}
+	/* Each psp need to set the latest topology */
+	list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) {
+		ret = psp_xgmi_set_topology_info(&tmp_adev->psp, count, tmp_topology);
+		if (ret) {
+			dev_err(tmp_adev->dev,
+				"XGMI: Set topology failure on device %llx, hive %llx, ret %d",
+				tmp_adev->gmc.xgmi.device_id,
+				tmp_adev->gmc.xgmi.hive_id, ret);
+			/* To do : continue with some  node failed or disable the  whole  hive */
+			break;
+		}
+	}
+	if (!ret)
+		dev_info(adev->dev, "XGMI: Add node %d to hive 0x%llx.\n",
+			adev->gmc.xgmi.physical_node_id,
+			adev->gmc.xgmi.hive_id);
+
+exit:
+	mutex_unlock(&xgmi_mutex);
+	return ret;
+}
+
+