drm/amdgpu: replace per_device_list by array

Remove per_device_list from kfd_process and replace it with a
kfd_process_device pointers array of MAX_GPU_INSTANCES size. This helps
to manage the kfd_process_devices binded to a specific kfd_process.
Also, functions used by kfd_chardev to iterate over the list were
removed, since they are not valid anymore. Instead, it was replaced by a
local loop iterating the array.

Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Jonathan Kim <jonathan.kim@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 4 insertions, 16 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index d8c8b5ff449a..33e56db14327 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -45,6 +45,7 @@
 #include <linux/swap.h>
 
 #include "amd_shared.h"
+#include "amdgpu.h"
 
 #define KFD_MAX_RING_ENTRY_SIZE	8
 
@@ -649,12 +650,6 @@ enum kfd_pdd_bound {
 
 /* Data that is per-process-per device. */
 struct kfd_process_device {
-	/*
-	 * List of all per-device data for a process.
-	 * Starts from kfd_process.per_device_data.
-	 */
-	struct list_head per_device_list;
-
 	/* The device that owns this data. */
 	struct kfd_dev *dev;
 
@@ -771,10 +766,11 @@ struct kfd_process {
 	u32 pasid;
 
 	/*
-	 * List of kfd_process_device structures,
+	 * Array of kfd_process_device pointers,
 	 * one for each device the process is using.
 	 */
-	struct list_head per_device_data;
+	struct kfd_process_device *pdds[MAX_GPU_INSTANCE];
+	uint32_t n_pdds;
 
 	struct process_queue_manager pqm;
 
@@ -872,14 +868,6 @@ void *kfd_process_device_translate_handle(struct kfd_process_device *p,
 void kfd_process_device_remove_obj_handle(struct kfd_process_device *pdd,
 					int handle);
 
-/* Process device data iterator */
-struct kfd_process_device *kfd_get_first_process_device_data(
-							struct kfd_process *p);
-struct kfd_process_device *kfd_get_next_process_device_data(
-						struct kfd_process *p,
-						struct kfd_process_device *pdd);
-bool kfd_has_process_device_data(struct kfd_process *p);
-
 /* PASIDs */
 int kfd_pasid_init(void);
 void kfd_pasid_exit(void);