drm/amdgpu: Expose hive adev list and xgmi_mutex

It's needed for device reset of entire hive.

v3:
Add per hive lock to allow avoiding duplicate resets triggered by
multiple members  of same hive.
Expose amdgpu_hive_info instead of adding getter functions.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index 59e667a..fb37e69 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -23,7 +23,6 @@
  */
 #include <linux/list.h>
 #include "amdgpu.h"
-#include "amdgpu_psp.h"
 #include "amdgpu_xgmi.h"
 
 
@@ -32,16 +31,15 @@ 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;
-       struct psp_xgmi_topology_info   topology_info;
-       int number_devices;
-};
-
 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;
@@ -61,6 +59,8 @@ struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev)
        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;
 }
 

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
index 85a7263..6335bfd 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
@@ -22,12 +22,15 @@
 #ifndef __AMDGPU_XGMI_H__
 #define __AMDGPU_XGMI_H__
 
-/*
- * functions used by amdgpu_xgmi.c
- */
+#include "amdgpu_psp.h"
 
-struct amdgpu_device;
-struct amdgpu_hive_info;
+struct amdgpu_hive_info {
+       uint64_t                hive_id;
+       struct list_head        device_list;
+       struct psp_xgmi_topology_info   topology_info;
+       int number_devices;
+       struct mutex hive_lock;
+};
 
 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev);
 int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev);