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https://github.com/NVIDIA/open-gpu-kernel-modules.git
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100 lines
3.5 KiB
C
100 lines
3.5 KiB
C
/*******************************************************************************
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Copyright (c) 2016-2019 NVIDIA Corporation
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to
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deal in the Software without restriction, including without limitation the
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rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*******************************************************************************/
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#include "uvm_perf_events.h"
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#include "uvm_va_block.h"
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#include "uvm_va_range.h"
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#include "uvm_va_space.h"
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#include "uvm_kvmalloc.h"
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#include "uvm_test.h"
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// Global variable used to check that callbacks are correctly executed
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static int test_data;
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static void callback_inc_1(uvm_perf_event_t event_id, uvm_perf_event_data_t *event_data)
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{
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++test_data;
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}
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static void callback_inc_2(uvm_perf_event_t event_id, uvm_perf_event_data_t *event_data)
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{
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test_data += 2;
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}
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static NV_STATUS test_events(uvm_va_space_t *va_space)
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{
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NV_STATUS status;
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uvm_perf_event_data_t event_data;
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uvm_va_block_t block;
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test_data = 0;
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memset(&event_data, 0, sizeof(event_data));
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// Use CPU id to avoid triggering the GPU stats update code
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event_data.fault.proc_id = UVM_ID_CPU;
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// Register a callback for page fault
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status = uvm_perf_register_event_callback(&va_space->perf_events, UVM_PERF_EVENT_FAULT, callback_inc_1);
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TEST_CHECK_GOTO(status == NV_OK, done);
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// Register a callback for page fault
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status = uvm_perf_register_event_callback(&va_space->perf_events, UVM_PERF_EVENT_FAULT, callback_inc_2);
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TEST_CHECK_GOTO(status == NV_OK, done);
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// va_space read lock is required for page fault event notification
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uvm_va_space_down_read(va_space);
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// Notify (fake) page fault. The two registered callbacks for this event increment the value of test_value
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event_data.fault.block = █
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uvm_perf_event_notify(&va_space->perf_events, UVM_PERF_EVENT_FAULT, &event_data);
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uvm_va_space_up_read(va_space);
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// test_data was initialized to zero. It should have been incremented by 1 and 2, respectively in the callbacks
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TEST_CHECK_GOTO(test_data == 3, done);
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done:
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// Unregister all callbacks
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uvm_perf_unregister_event_callback(&va_space->perf_events, UVM_PERF_EVENT_FAULT, callback_inc_1);
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uvm_perf_unregister_event_callback(&va_space->perf_events, UVM_PERF_EVENT_FAULT, callback_inc_2);
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return status;
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}
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NV_STATUS uvm_test_perf_events_sanity(UVM_TEST_PERF_EVENTS_SANITY_PARAMS *params, struct file *filp)
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{
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NV_STATUS status;
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uvm_va_space_t *va_space;
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va_space = uvm_va_space_get(filp);
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status = test_events(va_space);
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if (status != NV_OK)
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goto done;
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done:
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return status;
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}
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