1 files changed, 119 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
new file mode 100644
index 000000000000..897afbb348c1
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -0,0 +1,119 @@
+/*
+ * 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;
+}
+
+