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gpu: nvgpu: unit: mm: add coverage & traceability

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This patch adds new tests to improve test coverage. Also, updating test
target tags to increase traceability.

Jira NVGPU-4780

Change-Id: I87341efa3fa7d741f7abb611ff28ad6d5e1c6880
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2279644
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Vedashree Vidwans
2019-12-31 11:00:24 -08:00
committed by Alex Waterman
parent 4bcd419a0b
commit f46c3064ed
27 changed files with 934 additions and 240 deletions
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79
userspace/units/mm/vm/vm.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -60,6 +60,7 @@
#define SPECIAL_CASE_DOUBLE_MAP 1
#define SPECIAL_CASE_NO_FREE 2
#define SPECIAL_CASE_NO_VM_AREA 4
#define SPECIAL_CASE_TIMEOUT_INIT_FAIL 8
/*
* Helper function used to create custom SGTs from a list of SGLs.
@@ -512,6 +513,8 @@ static int map_buffer(struct unit_module *m,
u32 pte[2];
struct nvgpu_mapped_buf **mapped_buffers = NULL;
u32 num_mapped_buffers = 0;
struct nvgpu_posix_fault_inj *timers_fi =
nvgpu_timers_get_fault_injection();
struct nvgpu_posix_fault_inj *kmem_fi =
nvgpu_kmem_get_fault_injection();
@@ -748,7 +751,13 @@ static int map_buffer(struct unit_module *m,
free_mapped_buf:
if ((mapped_buf != NULL) && !(subcase & SPECIAL_CASE_NO_FREE)) {
nvgpu_vm_unmap(vm, mapped_buf->addr, batch);
if (subcase & SPECIAL_CASE_TIMEOUT_INIT_FAIL) {
nvgpu_posix_enable_fault_injection(timers_fi, true, 0);
nvgpu_vm_unmap(vm, mapped_buf->addr, batch);
nvgpu_posix_enable_fault_injection(timers_fi, false, 0);
} else {
nvgpu_vm_unmap(vm, mapped_buf->addr, batch);
}
/*
* Unmapping an already unmapped buffer should not cause any
* errors.
@@ -949,8 +958,8 @@ int test_init_error_paths(struct unit_module *m, struct gk20a *g, void *__args)
}
low_hole = SZ_1M * 64;
/* Cause nvgpu_allocator_init(BUDDY) to fail for user VMA */
nvgpu_posix_enable_fault_injection(kmem_fi, true, 5);
/* Cause nvgpu_gmmu_init_page_table to fail */
nvgpu_posix_enable_fault_injection(kmem_fi, true, 0);
ret = nvgpu_vm_do_init(&g->mm, vm,
g->ops.mm.gmmu.get_default_big_page_size(),
low_hole, kernel_reserved, aperture_size,
@@ -962,8 +971,8 @@ int test_init_error_paths(struct unit_module *m, struct gk20a *g, void *__args)
goto exit;
}
/* Cause nvgpu_allocator_init(BUDDY) to fail for kernel VMA */
nvgpu_posix_enable_fault_injection(kmem_fi, true, 10);
/* Cause nvgpu_allocator_init(BUDDY) to fail for user VMA */
nvgpu_posix_enable_fault_injection(kmem_fi, true, 5);
ret = nvgpu_vm_do_init(&g->mm, vm,
g->ops.mm.gmmu.get_default_big_page_size(),
low_hole, kernel_reserved, aperture_size,
@@ -975,6 +984,32 @@ int test_init_error_paths(struct unit_module *m, struct gk20a *g, void *__args)
goto exit;
}
/* Cause nvgpu_allocator_init(BUDDY) to fail for user_lp VMA */
nvgpu_posix_enable_fault_injection(kmem_fi, true, 12);
ret = nvgpu_vm_do_init(&g->mm, vm,
g->ops.mm.gmmu.get_default_big_page_size(),
low_hole, kernel_reserved, aperture_size,
big_pages, false, false, __func__);
nvgpu_posix_enable_fault_injection(kmem_fi, false, 0);
if (ret != -ENOMEM) {
unit_err(m, "nvgpu_vm_do_init didn't fail as expected (9).\n");
ret = UNIT_FAIL;
goto exit;
}
/* Cause nvgpu_allocator_init(BUDDY) to fail for kernel VMA */
nvgpu_posix_enable_fault_injection(kmem_fi, true, 17);
ret = nvgpu_vm_do_init(&g->mm, vm,
g->ops.mm.gmmu.get_default_big_page_size(),
low_hole, kernel_reserved, aperture_size,
big_pages, false, false, __func__);
nvgpu_posix_enable_fault_injection(kmem_fi, false, 0);
if (ret != -ENOMEM) {
unit_err(m, "nvgpu_vm_do_init didn't fail as expected (10).\n");
ret = UNIT_FAIL;
goto exit;
}
/* Invalid low_hole and kernel_reserved to cause an invalid config */
vm->guest_managed = true;
ret = nvgpu_vm_do_init(&g->mm, vm,
@@ -984,7 +1019,19 @@ int test_init_error_paths(struct unit_module *m, struct gk20a *g, void *__args)
__func__);
vm->guest_managed = false;
if (ret != -EINVAL) {
unit_err(m, "nvgpu_vm_do_init did not fail as expected (9).\n");
unit_err(m, "nvgpu_vm_do_init didn't fail as expected (11).\n");
ret = UNIT_FAIL;
goto exit;
}
/* Cause nvgpu_vm_init_vma_allocators to fail for long vm name */
ret = nvgpu_vm_do_init(&g->mm, vm,
g->ops.mm.gmmu.get_default_big_page_size(),
low_hole, kernel_reserved, aperture_size,
big_pages, false, false,
"very_long_vm_name_to_fail_vm_init");
if (ret != -EINVAL) {
unit_err(m, "nvgpu_vm_do_init didn't fail as expected (12).\n");
ret = UNIT_FAIL;
goto exit;
}
@@ -1387,6 +1434,24 @@ int test_map_buf_gpu_va(struct unit_module *m,
goto exit;
}
/*
* Corner case: Timeout init fails in nvgpu_vm_unmap
*/
ret = map_buffer(m,
g,
vm,
NULL,
BUF_CPU_PA,
gpu_va,
buf_size,
page_size,
alignment,
SPECIAL_CASE_TIMEOUT_INIT_FAIL);
if (ret != UNIT_SUCCESS) {
unit_err(m, "Mapping failed (already mapped case)\n");
goto exit;
}
/* Map 64KB buffer */
buf_size = SZ_64K;
page_size = SZ_64K;