drm/amdkfd: Enable processes isolation on gfx9

When amdgpu enable enforce_isolation, KFD enables single-process mode in
HWS and sets exec_cleaner_shader bit in MAP_PROCESS.
Signed-off-by: Amber Lin <Amber.Lin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c

@@ -37,11 +37,14 @@ static int pm_map_process_v9(struct packet_manager *pm,
 	struct kfd_node *kfd = pm->dqm->dev;
 	struct kfd_process_device *pdd =
 			container_of(qpd, struct kfd_process_device, qpd);
+	struct amdgpu_device *adev = kfd->adev;
 
 	packet = (struct pm4_mes_map_process *)buffer;
 	memset(buffer, 0, sizeof(struct pm4_mes_map_process));
 	packet->header.u32All = pm_build_pm4_header(IT_MAP_PROCESS,
 					sizeof(struct pm4_mes_map_process));
+	if (adev->enforce_isolation[kfd->node_id])
+		packet->bitfields2.exec_cleaner_shader = 1;
 	packet->bitfields2.diq_enable = (qpd->is_debug) ? 1 : 0;
 	packet->bitfields2.process_quantum = 10;
 	packet->bitfields2.pasid = qpd->pqm->process->pasid;
@@ -89,14 +92,18 @@ static int pm_map_process_aldebaran(struct packet_manager *pm,
 	struct pm4_mes_map_process_aldebaran *packet;
 	uint64_t vm_page_table_base_addr = qpd->page_table_base;
 	struct kfd_dev *kfd = pm->dqm->dev->kfd;
+	struct kfd_node *knode = pm->dqm->dev;
 	struct kfd_process_device *pdd =
 			container_of(qpd, struct kfd_process_device, qpd);
 	int i;
+	struct amdgpu_device *adev = kfd->adev;
 
 	packet = (struct pm4_mes_map_process_aldebaran *)buffer;
 	memset(buffer, 0, sizeof(struct pm4_mes_map_process_aldebaran));
 	packet->header.u32All = pm_build_pm4_header(IT_MAP_PROCESS,
 			sizeof(struct pm4_mes_map_process_aldebaran));
+	if (adev->enforce_isolation[knode->node_id])
+		packet->bitfields2.exec_cleaner_shader = 1;
 	packet->bitfields2.diq_enable = (qpd->is_debug) ? 1 : 0;
 	packet->bitfields2.process_quantum = 10;
 	packet->bitfields2.pasid = qpd->pqm->process->pasid;
@@ -144,17 +151,22 @@ static int pm_runlist_v9(struct packet_manager *pm, uint32_t *buffer,
 
 	int concurrent_proc_cnt = 0;
 	struct kfd_node *kfd = pm->dqm->dev;
+	struct amdgpu_device *adev = kfd->adev;
 
 	/* Determine the number of processes to map together to HW:
 	 * it can not exceed the number of VMIDs available to the
 	 * scheduler, and it is determined by the smaller of the number
 	 * of processes in the runlist and kfd module parameter
 	 * hws_max_conc_proc.
+	 * However, if enforce_isolation is set (toggle LDS/VGPRs/SGPRs
+	 * cleaner between process switch), enable single-process mode
+	 * in HWS.
 	 * Note: the arbitration between the number of VMIDs and
 	 * hws_max_conc_proc has been done in
 	 * kgd2kfd_device_init().
 	 */
-	concurrent_proc_cnt = min(pm->dqm->processes_count,
+	concurrent_proc_cnt = adev->enforce_isolation[kfd->node_id] ?
+			1 : min(pm->dqm->processes_count,
 			kfd->max_proc_per_quantum);
 
 	packet = (struct pm4_mes_runlist *)buffer;

drivers/gpu/drm/amd/amdkfd/kfd_pm4_headers_ai.h

@@ -145,8 +145,9 @@ struct pm4_mes_map_process {
 
 	union {
 		struct {
-			uint32_t pasid:16;
-			uint32_t reserved1:2;
+			uint32_t pasid:16;		/* 0 - 15  */
+			uint32_t reserved1:1;		/* 16      */
+			uint32_t exec_cleaner_shader:1;	/* 17      */
 			uint32_t debug_vmid:4;
 			uint32_t new_debug:1;
 			uint32_t reserved2:1;

drivers/gpu/drm/amd/amdkfd/kfd_pm4_headers_aldebaran.h

@@ -37,7 +37,7 @@ struct pm4_mes_map_process_aldebaran {
 		struct {
 			uint32_t pasid:16;	    /* 0 - 15  */
 			uint32_t single_memops:1;   /* 16      */
-			uint32_t reserved1:1;	    /* 17      */
+			uint32_t exec_cleaner_shader:1;	    /* 17      */
 			uint32_t debug_vmid:4;	    /* 18 - 21 */
 			uint32_t new_debug:1;	    /* 22      */
 			uint32_t tmz:1;		    /* 23      */