drm/amdgpu: remove unused functions and variables

This patch removes some variables and functions from KFD
doorbell handling code, which are no more required since
doorbell manager is handling doorbell calculations.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c

@@ -200,38 +200,6 @@ void write_kernel_doorbell64(void __iomem *db, u64 value)
 	}
 }
 
-unsigned int kfd_get_doorbell_dw_offset_in_bar(struct kfd_dev *kfd,
-					struct kfd_process_device *pdd,
-					unsigned int doorbell_id)
-{
-	/*
-	 * doorbell_base_dw_offset accounts for doorbells taken by KGD.
-	 * index * kfd_doorbell_process_slice/sizeof(u32) adjusts to
-	 * the process's doorbells. The offset returned is in dword
-	 * units regardless of the ASIC-dependent doorbell size.
-	 */
-	if (!kfd->shared_resources.enable_mes)
-		return kfd->doorbell_base_dw_offset +
-			pdd->doorbell_index
-			* kfd_doorbell_process_slice(kfd) / sizeof(u32) +
-			doorbell_id *
-			kfd->device_info.doorbell_size / sizeof(u32);
-	else
-		return amdgpu_mes_get_doorbell_dw_offset_in_bar(
-				(struct amdgpu_device *)kfd->adev,
-				pdd->doorbell_index, doorbell_id);
-}
-
-uint64_t kfd_get_number_elems(struct kfd_dev *kfd)
-{
-	uint64_t num_of_elems = (kfd->shared_resources.doorbell_aperture_size -
-				kfd->shared_resources.doorbell_start_offset) /
-					kfd_doorbell_process_slice(kfd) + 1;
-
-	return num_of_elems;
-
-}
-
 static int init_doorbell_bitmap(struct qcm_process_device *qpd,
 				struct kfd_dev *dev)
 {

drivers/gpu/drm/amd/amdkfd/kfd_priv.h

@@ -323,15 +323,6 @@ struct kfd_dev {
 
 	struct kfd_device_info device_info;
 
-	phys_addr_t doorbell_base;	/* Start of actual doorbells used by
-					 * KFD. It is aligned for mapping
-					 * into user mode
-					 */
-	size_t doorbell_base_dw_offset;	/* Offset from the start of the PCI
-					 * doorbell BAR to the first KFD
-					 * doorbell in dwords. GFX reserves
-					 * the segment before this offset.
-					 */
 	u32 __iomem *doorbell_kernel_ptr; /* This is a pointer for a doorbells
 					   * page used by kernel queue
 					   */
@@ -340,8 +331,6 @@ struct kfd_dev {
 
 	const struct kfd2kgd_calls *kfd2kgd;
 	struct mutex doorbell_mutex;
-	DECLARE_BITMAP(doorbell_available_index,
-			KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
 
 	void *gtt_mem;
 	uint64_t gtt_start_gpu_addr;
@@ -801,7 +790,6 @@ struct kfd_process_device {
 	struct attribute attr_evict;
 
 	struct kobject *kobj_stats;
-	unsigned int doorbell_index;
 
 	/*
 	 * @cu_occupancy: Reports occupancy of Compute Units (CU) of a process