From 4d326469d98a9ea64d20a34ad064ada04a0891fb Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs@redhat.com>
Date: Tue, 11 Dec 2018 14:50:02 +1000
Subject: [PATCH] drm/nouveau/fault: remove manual mapping of fault buffers into BAR2
Git-commit: 4d326469d98a9ea64d20a34ad064ada04a0891fb
Patch-mainline: v5.0-rc1
References: bsc#1133593

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/nouveau/nvkm/subdev/fault/base.c  | 15 +++++----------
 drivers/gpu/drm/nouveau/nvkm/subdev/fault/gp100.c |  6 ++----
 drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c |  4 ++--
 drivers/gpu/drm/nouveau/nvkm/subdev/fault/priv.h  |  2 +-
 4 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/base.c
index 16ad91c91a7b..494a4a4265b3 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/base.c
@@ -23,8 +23,6 @@
 
 #include <core/memory.h>
 #include <core/notify.h>
-#include <subdev/bar.h>
-#include <subdev/mmu.h>
 
 static void
 nvkm_fault_ntfy_fini(struct nvkm_event *event, int type, int index)
@@ -91,7 +89,6 @@ nvkm_fault_oneinit_buffer(struct nvkm_fault *fault, int id)
 {
 	struct nvkm_subdev *subdev = &fault->subdev;
 	struct nvkm_device *device = subdev->device;
-	struct nvkm_vmm *bar2 = nvkm_bar_bar2_vmm(device);
 	struct nvkm_fault_buffer *buffer;
 	int ret;
 
@@ -110,12 +107,12 @@ nvkm_fault_oneinit_buffer(struct nvkm_fault *fault, int id)
 	if (ret)
 		return ret;
 
-	ret = nvkm_vmm_get(bar2, 12, nvkm_memory_size(buffer->mem),
-			   &buffer->vma);
-	if (ret)
-		return ret;
+	/* Pin fault buffer in BAR2. */
+	buffer->addr = nvkm_memory_bar2(buffer->mem);
+	if (buffer->addr == ~0ULL)
+		return -EFAULT;
 
-	return nvkm_memory_map(buffer->mem, 0, bar2, buffer->vma, NULL, 0);
+	return 0;
 }
 
 static int
@@ -146,7 +143,6 @@ nvkm_fault_oneinit(struct nvkm_subdev *subdev)
 static void *
 nvkm_fault_dtor(struct nvkm_subdev *subdev)
 {
-	struct nvkm_vmm *bar2 = nvkm_bar_bar2_vmm(subdev->device);
 	struct nvkm_fault *fault = nvkm_fault(subdev);
 	int i;
 
@@ -154,7 +150,6 @@ nvkm_fault_dtor(struct nvkm_subdev *subdev)
 
 	for (i = 0; i < fault->buffer_nr; i++) {
 		if (fault->buffer[i]) {
-			nvkm_vmm_put(bar2, &fault->buffer[i]->vma);
 			nvkm_memory_unref(&fault->buffer[i]->mem);
 			kfree(fault->buffer[i]);
 		}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gp100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gp100.c
index 5e71db2e8d75..65822652dca5 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gp100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gp100.c
@@ -21,8 +21,6 @@
  */
 #include "priv.h"
 
-#include <subdev/mmu.h>
-
 static void
 gp100_fault_buffer_fini(struct nvkm_fault_buffer *buffer)
 {
@@ -34,8 +32,8 @@ static void
 gp100_fault_buffer_init(struct nvkm_fault_buffer *buffer)
 {
 	struct nvkm_device *device = buffer->fault->subdev.device;
-	nvkm_wr32(device, 0x002a74, upper_32_bits(buffer->vma->addr));
-	nvkm_wr32(device, 0x002a70, lower_32_bits(buffer->vma->addr));
+	nvkm_wr32(device, 0x002a74, upper_32_bits(buffer->addr));
+	nvkm_wr32(device, 0x002a70, lower_32_bits(buffer->addr));
 	nvkm_mask(device, 0x002a70, 0x00000001, 0x00000001);
 }
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c
index 3cd610d7deb5..f836fcef8b72 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c
@@ -88,8 +88,8 @@ gv100_fault_buffer_init(struct nvkm_fault_buffer *buffer)
 	const u32 foff = buffer->id * 0x14;
 
 	nvkm_mask(device, 0x100e34 + foff, 0xc0000000, 0x40000000);
-	nvkm_wr32(device, 0x100e28 + foff, upper_32_bits(buffer->vma->addr));
-	nvkm_wr32(device, 0x100e24 + foff, lower_32_bits(buffer->vma->addr));
+	nvkm_wr32(device, 0x100e28 + foff, upper_32_bits(buffer->addr));
+	nvkm_wr32(device, 0x100e24 + foff, lower_32_bits(buffer->addr));
 	nvkm_mask(device, 0x100e34 + foff, 0x80000000, 0x80000000);
 	nvkm_mask(device, 0x100a2c, intr, intr);
 }
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/priv.h b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/priv.h
index e4d2f5234fd1..6439bc591cc7 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/priv.h
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/priv.h
@@ -13,7 +13,7 @@ struct nvkm_fault_buffer {
 	int id;
 	int entries;
 	struct nvkm_memory *mem;
-	struct nvkm_vma *vma;
+	u64 addr;
 };
 
 int nvkm_fault_new_(const struct nvkm_fault_func *, struct nvkm_device *,
-- 
2.16.4