drm/amdkfd: Support process XNACK mode dynamic change

Update queue qpd is done for the first queue creation of the process,
if the device support XNACK mode per process, update qpd setup
sh_mem_config based on the process XNACK mode, to support the process
destroy all queues, change XNACK mode, and then create queues.

Add helper macro KFD_SUPPORT_XNACK_PER_PROCESS to remove duplicate code
and add new ASICs support in future.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_v9.c

@@ -59,30 +59,27 @@ static int update_qpd_v9(struct device_queue_manager *dqm,
 
 	/* check if sh_mem_config register already configured */
 	if (qpd->sh_mem_config == 0) {
-		qpd->sh_mem_config =
-				SH_MEM_ALIGNMENT_MODE_UNALIGNED <<
+		qpd->sh_mem_config = SH_MEM_ALIGNMENT_MODE_UNALIGNED <<
 					SH_MEM_CONFIG__ALIGNMENT_MODE__SHIFT;
 
-		if (KFD_GC_VERSION(dqm->dev) == IP_VERSION(9, 4, 2)) {
-			/* Aldebaran can safely support different XNACK modes
-			 * per process
-			 */
-			if (!pdd->process->xnack_enabled)
-				qpd->sh_mem_config |=
-					1 << SH_MEM_CONFIG__RETRY_DISABLE__SHIFT;
-		} else if (dqm->dev->noretry &&
-			   !dqm->dev->use_iommu_v2) {
-			qpd->sh_mem_config |=
-				1 << SH_MEM_CONFIG__RETRY_DISABLE__SHIFT;
-		}
+		if (dqm->dev->noretry && !dqm->dev->use_iommu_v2)
+			qpd->sh_mem_config |= 1 << SH_MEM_CONFIG__RETRY_DISABLE__SHIFT;
 
 		qpd->sh_mem_ape1_limit = 0;
 		qpd->sh_mem_ape1_base = 0;
 	}
 
+	if (KFD_SUPPORT_XNACK_PER_PROCESS(dqm->dev)) {
+		if (!pdd->process->xnack_enabled)
+			qpd->sh_mem_config |= 1 << SH_MEM_CONFIG__RETRY_DISABLE__SHIFT;
+		else
+			qpd->sh_mem_config &= ~(1 << SH_MEM_CONFIG__RETRY_DISABLE__SHIFT);
+	}
+
 	qpd->sh_mem_bases = compute_sh_mem_bases_64bit(pdd);
 
-	pr_debug("sh_mem_bases 0x%X\n", qpd->sh_mem_bases);
+	pr_debug("sh_mem_bases 0x%X sh_mem_config 0x%X\n", qpd->sh_mem_bases,
+		 qpd->sh_mem_config);
 
 	return 0;
 }

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

@@ -206,6 +206,8 @@ enum cache_policy {
 
 #define KFD_GC_VERSION(dev) ((dev)->adev->ip_versions[GC_HWIP][0])
 #define KFD_IS_SOC15(dev)   ((KFD_GC_VERSION(dev)) >= (IP_VERSION(9, 0, 1)))
+#define KFD_SUPPORT_XNACK_PER_PROCESS(dev)\
+		(KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 2))
 
 struct kfd_event_interrupt_class {
 	bool (*interrupt_isr)(struct kfd_dev *dev,

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

@@ -1330,7 +1330,7 @@ bool kfd_process_xnack_mode(struct kfd_process *p, bool supported)
 		 * per-process XNACK mode selection. But let the dev->noretry
 		 * setting still influence the default XNACK mode.
 		 */
-		if (supported && KFD_GC_VERSION(dev) == IP_VERSION(9, 4, 2))
+		if (supported && KFD_SUPPORT_XNACK_PER_PROCESS(dev))
 			continue;
 
 		/* GFXv10 and later GPUs do not support shader preemption