2022-05-09 22:18:59 +02:00
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/*******************************************************************************
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2022-11-10 17:39:33 +01:00
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Copyright (c) 2021-2022 NVIDIA Corporation
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2022-05-09 22:18:59 +02:00
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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_common.h"
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#include "uvm_linux.h"
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#include "uvm_test.h"
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#include "uvm_va_space.h"
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#include "uvm_va_range.h"
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#include "uvm_hmm.h"
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NV_STATUS uvm_test_hmm_sanity(UVM_TEST_HMM_SANITY_PARAMS *params, struct file *filp)
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{
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uvm_va_space_t *va_space = uvm_va_space_get(filp);
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struct mm_struct *mm;
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uvm_va_block_t *hmm_block = NULL;
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NV_STATUS status;
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mm = uvm_va_space_mm_or_current_retain(va_space);
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if (!mm)
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return NV_WARN_NOTHING_TO_DO;
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uvm_down_write_mmap_lock(mm);
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uvm_va_space_down_write(va_space);
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// TODO: Bug 3351822: [UVM-HMM] Remove temporary testing changes.
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// By default, HMM is enabled system wide but disabled per va_space.
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// This will initialize the va_space for HMM.
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status = uvm_hmm_va_space_initialize_test(va_space);
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if (status != NV_OK)
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goto out;
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uvm_va_space_up_write(va_space);
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uvm_up_write_mmap_lock(mm);
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uvm_down_read_mmap_lock(mm);
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uvm_va_space_down_read(va_space);
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// Try to create an HMM va_block to virtual address zero (NULL).
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// It should fail. There should be no VMA but a va_block for range
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// [0x0 0x1fffff] is possible.
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status = uvm_hmm_va_block_find_create(va_space, 0UL, NULL, &hmm_block);
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TEST_CHECK_GOTO(status == NV_ERR_INVALID_ADDRESS, done);
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// Try to create an HMM va_block which overlaps a managed block.
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// It should fail.
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status = uvm_hmm_va_block_find_create(va_space, params->uvm_address, NULL, &hmm_block);
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TEST_CHECK_GOTO(status == NV_ERR_INVALID_ADDRESS, done);
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// Try to create an HMM va_block; it should succeed.
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status = uvm_hmm_va_block_find_create(va_space, params->hmm_address, NULL, &hmm_block);
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TEST_CHECK_GOTO(status == NV_OK, done);
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// Try to find an existing HMM va_block; it should succeed.
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status = uvm_hmm_va_block_find(va_space, params->hmm_address, &hmm_block);
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TEST_CHECK_GOTO(status == NV_OK, done);
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done:
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uvm_va_space_up_read(va_space);
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uvm_up_read_mmap_lock(mm);
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uvm_va_space_mm_or_current_release(va_space, mm);
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return status;
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out:
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uvm_va_space_up_write(va_space);
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uvm_up_write_mmap_lock(mm);
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uvm_va_space_mm_or_current_release(va_space, mm);
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return status;
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}
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