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gpu: nvgpu: unit: fault injection for POSIX build

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This adds a fault injection module to the POSIX build that can be added
to modules (for example k*alloc) then exercised in unit tests. The unit
tests can then verify that the driver units handle errors from the
modules.

JIRA NVGPU-1235

Change-Id: I9d9e443608e3d2026e165a62f7a7f011df96fd54
Signed-off-by: Philip Elcan <pelcan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1927455
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Philip Elcan
2018-10-10 13:51:45 -04:00
committed by mobile promotions
parent 9fda4bc276
commit c410ab5655
3 changed files with 150 additions and 0 deletions
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1
drivers/gpu/nvgpu/Makefile.sources
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@@ -44,6 +44,7 @@ srcs := os/posix/nvgpu.c \
os/posix/nvlink.c \
os/posix/lock.c \
os/posix/stubs.c \
os/posix/posix-fault-injection.c \
common/mm/nvgpu_allocator.c \
common/mm/bitmap_allocator.c \
common/mm/buddy_allocator.c \

82
drivers/gpu/nvgpu/include/nvgpu/posix/posix-fault-injection.h Normal file
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@@ -0,0 +1,82 @@
/*
* Copyright (c) 2018, 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"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef NVGPU_POSIX_FAULT_INJECTION_H
#define NVGPU_POSIX_FAULT_INJECTION_H
struct nvgpu_posix_fault_inj {
bool enabled;
unsigned int counter;
};
/**
* nvgpu_posix_init_fault_injection - Initialize the fault injection object
* to be used by a module that will report errors.
*
* @fi - pointer to the fault_inj object to initialize
*/
void nvgpu_posix_init_fault_injection(struct nvgpu_posix_fault_inj *fi);
/**
* nvgpu_posix_enable_fault_injection - Enable/Disable fault injection for the
* object after @number calls to the
* module. This depends on
* nvgpu_posix_fault_injection_handle_call
* being called by each function in the
* module that can fault. Only routines
* that can fault will decrement the
* delay count.
*
* @fi - pointer to the fault_inj object.
* @enable - true to enable. false to disable.
* @number - After <number> of calls to kmem alloc or cache routines, enable or
* disable fault injection. Use 0 to enable/disable immediately.
*/
void nvgpu_posix_enable_fault_injection(struct nvgpu_posix_fault_inj *fi,
bool enable, unsigned int number);
/**
* nvgpu_posix_is_fault_injection_triggered - Query if fault injection is
* currently enabled for the @fi
* object.
*
* @fi - pointer to the fault_inj object
*
* Returns true if fault injections are enabled.
*/
bool nvgpu_posix_is_fault_injection_triggered(struct nvgpu_posix_fault_inj *fi);
/**
* nvgpu_posix_fault_injection_handle_call - Called by module functions to
* track enabling or disabling fault
* injections. Returns true if the
* module should return an error.
*
* @fi - pointer to the fault_inj object
*
* Returns true if the module should return an error.
*/
bool nvgpu_posix_fault_injection_handle_call(struct nvgpu_posix_fault_inj *fi);
#endif /* NVGPU_POSIX_FAULT_INJECTION_H */

67
drivers/gpu/nvgpu/os/posix/posix-fault-injection.c Normal file
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@@ -0,0 +1,67 @@
/*
* Copyright (c) 2018, 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"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdbool.h>
#include <nvgpu/posix/posix-fault-injection.h>
void nvgpu_posix_init_fault_injection(struct nvgpu_posix_fault_inj *fi)
{
fi->enabled = false;
fi->counter = 0U;
}
void nvgpu_posix_enable_fault_injection(struct nvgpu_posix_fault_inj *fi,
bool enable, unsigned int number)
{
if (number == 0U) {
fi->enabled = enable;
fi->counter = 0U;
} else {
fi->enabled = !enable;
fi->counter = number;
}
}
bool nvgpu_posix_is_fault_injection_triggered(struct nvgpu_posix_fault_inj *fi)
{
return fi->enabled;
}
/*
* Return status of fault injection.
* Decrement fault injection count for each call.
*/
bool nvgpu_posix_fault_injection_handle_call(struct nvgpu_posix_fault_inj *fi)
{
bool current_state = fi->enabled;
if (fi->counter > 0U) {
fi->counter--;
if (fi->counter == 0U) {
/* for next time */
fi->enabled = !fi->enabled;
}
}
return current_state;
}