[PATCH v2 3/3] powerpc/powernv/npu: Remove atsd_threshold debugfs setting

[Mark Hairgrove]

This threshold is no longer used now that all invalidates issue a single
ATSD to each active NPU.

Signed-off-by: Mark Hairgrove <mhairgrove at nvidia.com>
---
 arch/powerpc/platforms/powernv/npu-dma.c |   14 --------------
 1 files changed, 0 insertions(+), 14 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c
index e4c0fab..6f60e09 100644
--- a/arch/powerpc/platforms/powernv/npu-dma.c
+++ b/arch/powerpc/platforms/powernv/npu-dma.c
@@ -17,7 +17,6 @@
 #include <linux/pci.h>
 #include <linux/memblock.h>
 #include <linux/iommu.h>
-#include <linux/debugfs.h>
 #include <linux/sizes.h>
 
 #include <asm/debugfs.h>
@@ -43,14 +42,6 @@
 static DEFINE_SPINLOCK(npu_context_lock);
 
 /*
- * When an address shootdown range exceeds this threshold we invalidate the
- * entire TLB on the GPU for the given PID rather than each specific address in
- * the range.
- */
-static uint64_t atsd_threshold = 2 * 1024 * 1024;
-static struct dentry *atsd_threshold_dentry;
-
-/*
  * Other types of TCE cache invalidation are not functional in the
  * hardware.
  */
@@ -966,11 +957,6 @@ int pnv_npu2_init(struct pnv_phb *phb)
 	static int npu_index;
 	uint64_t rc = 0;
 
-	if (!atsd_threshold_dentry) {
-		atsd_threshold_dentry = debugfs_create_x64("atsd_threshold",
-				   0600, powerpc_debugfs_root, &atsd_threshold);
-	}
-
 	phb->npu.nmmu_flush =
 		of_property_read_bool(phb->hose->dn, "ibm,nmmu-flush");
 	for_each_child_of_node(phb->hose->dn, dn) {
-- 
1.7.2.5