[PATCH] drm/amdkfd: Support process XNACK mode dynamic change

[Philip Yang <Philip.Yang@xxxxxxx>]

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
destory 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@xxxxxxx>
---
 .../amd/amdkfd/kfd_device_queue_manager_v9.c  | 27 +++++++++----------
 drivers/gpu/drm/amd/amdkfd/kfd_priv.h         |  2 ++
 drivers/gpu/drm/amd/amdkfd/kfd_process.c      |  2 +-
 3 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_v9.c
index d119070956fb..8b2dd2670ab7 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager_v9.c
+++ b/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;
 }
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 552c3ac85a13..bfa30d12406b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/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,
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 71db24fefe05..72df6286e240 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/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
-- 
2.35.1