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3cd256b344
Add REMAP ioctl and accompanying support to the linux nvgpu driver. REMAP support provides per-page control over sparse VM areas using the concept of a virtual memory pool. The REMAP ioctl accepts a list of operations (each a map or unmap) that modify the VM area pages tracked by the virtual mmemory pool. Inclusion of REMAP support in the nvgpu build is controlled by the new CONFIG_NVGPU_REMAP flag. This flag is enabled by default for linux builds. A new NVGPU_GPU_FLAGS_SUPPORT_REMAP characteristics flag is added for use in detecting when REMAP support is available. When a VM allocation tagged with NVGPU_VM_AREA_ALLOC_SPARSE is made the base virtual memory pool resources are allocated. Per-page resources are later allocated when the NVGPU_AS_IOCTL_REMAP ioctl is issued. All REMAP resources are released when the corresponding VM area is freed. Jira NVGPU-6804 Change-Id: I1f2cdc0c06c1698a62640c1c6fbcb2f9db24a0bc Signed-off-by: scottl <scottl@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2542178 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
/*
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* Copyright (c) 2017-2021, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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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 <nvgpu/vm.h>
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#include <nvgpu/vm_remap.h>
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u64 nvgpu_vm_remap_get_handle(struct nvgpu_vm_remap_os_buffer *remap_os_buf)
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{
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return 0;
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}
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int nvgpu_vm_remap_os_buf_get(struct vm_gk20a *vm, u32 mem_handle,
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struct nvgpu_vm_remap_os_buffer *remap_os_buf)
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{
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return 0;
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}
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void nvgpu_vm_remap_os_buf_put(struct vm_gk20a *vm,
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struct nvgpu_vm_remap_os_buffer *remap_os_buf)
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{
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return;
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}
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