gpu: nvgpu: gv11b: set up for enabling/handling hub intr

-implement mm ops init_mm_setup_hw
 This will also call *fault*setup* that will do s/w and h/w
 set up required to get mmu fault info

-implement s/w set up for copying mmu faults
 Two shadow fault buffers are pre allocated which will be used to copy
 fault info. One for copying from fault snap registers/nonreplayable h/w
 fault buffers and one for replay h/w fault buffers

-implement s/w set up for buffering mmu faults
 Replayable/Non-replayable fault buffers are mapped in BAR2
 virtual/physical address space. These buffers are circular buffers in
 terms of address calculation. Currently there are num host channels
 buffers

-configure h/w for buffering mmu faults
 if s/w set up is successful, configure h/w registers to enable
 buffered mode of mmu faults

-if both s/w and h/w set up are successful, enable corresponding
 hub interrupts

-implement new ops, fault_info_buf_deinit
 This will be called during gk20a_mm_destroy to disable hub intr and
 de-allocate shadow fault buf that is used to copy mmu fault info during
 mmu fault handling

-implement mm ops remove_bar2_vm
 This will also unmap and free fault buffers mapped in BAR2 if fault
 buffers were allocated

JIRA GPUT19X-7
JIRA GPUT19X-12

Change-Id: I53a38eddbb0a50a1f2024600583f2aae1f1fba6d
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: https://git-master/r/1492682
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gv11b/mm_gv11b.h b/drivers/gpu/nvgpu/gv11b/mm_gv11b.h
index 4284b171..a887c7f4 100644
--- a/drivers/gpu/nvgpu/gv11b/mm_gv11b.h
+++ b/drivers/gpu/nvgpu/gv11b/mm_gv11b.h
@@ -1,6 +1,6 @@
 /*
  * GV11B MM
- * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2016-2017, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -15,6 +15,9 @@
 #ifndef MM_GV11B_H
 #define MM_GV11B_H
 
+#define HW_FAULT_BUF_STATUS_ALLOC_TRUE  1
+#define HW_FAULT_BUF_STATUS_ALLOC_FALSE 0
+
 struct gpu_ops;
 
 void gv11b_init_mm(struct gpu_ops *gops);