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780b1f156b
Add doxygen documentation for mm.as in the as.h header. JIRA NVGPU-4036 Change-Id: I274ba146395ba463cf9d4f575ea817f9c633e5f7 Signed-off-by: Nicolas Benech <nbenech@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/2203941 Reviewed-by: Automatic_Commit_Validation_User 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>
127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*
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* GK20A Address Spaces
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*
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* Copyright (c) 2011-2019, 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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#ifndef NVGPU_AS_H
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#define NVGPU_AS_H
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#include <nvgpu/types.h>
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struct vm_gk20a;
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struct gk20a;
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/**
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* Basic structure to identify an address space (AS).
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*/
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struct gk20a_as {
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/**
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* Incrementing id to identify the AS, dummy allocator for now.
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*/
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int last_share_id;
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};
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/**
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* Basic structure to share an AS.
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*/
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struct gk20a_as_share {
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/**
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* The AS to share.
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*/
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struct gk20a_as *as;
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/**
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* The VM used by the AS.
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*/
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struct vm_gk20a *vm;
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/**
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* Simple incrementing id to identify the share.
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*/
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int id;
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};
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/**
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* AS allocation flag for userspace managed
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*/
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#define NVGPU_AS_ALLOC_USERSPACE_MANAGED BIT32(0)
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/**
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* AS allocation flag for unified VA
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*/
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#define NVGPU_AS_ALLOC_UNIFIED_VA BIT32(1)
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/**
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* @brief Release an AS share.
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*
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* @param as_share [in] The address space share to release.
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*
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* Call gk20a_vm_release_share on the provided \a as_share and release the
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* corresponding share id.
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*
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* @return 0 in case of success, < 0 in case of failure.
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*/
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int gk20a_as_release_share(struct gk20a_as_share *as_share);
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/**
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* @brief Set internal pointers to NULL and decrement reference count on the VM.
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*
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* @param as_share [in] The address space share to release.
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*
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* Release the \a as_share provided in argument by marking the internal pointers
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* between the share and its VM as NULL, and freeing it.
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*
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* @return 0 in case of success, < 0 in case of failure.
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*/
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int gk20a_vm_release_share(struct gk20a_as_share *as_share);
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/**
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* @brief Allocate an AS share.
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*
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* @param g [in] The GPU
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* @param big_page_size [in] Big page size to use for the VM
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* @param flags [in] NVGPU_AS_ALLOC_* flags
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* @params out [out] The resulting, allocated, gk20a_as_share
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* structure
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*
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* Allocate the gk20a_as_share structure and the VM associated with it, based
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* on the provided \a big_page_size and NVGPU_AS_ALLOC_* \a flags.
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*
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* Notes: if \a big_page_size == 0, the default big page size is used.
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*
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* @return 0 in case of success, < 0 in case of failure.
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*/
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int gk20a_as_alloc_share(struct gk20a *g, u32 big_page_size,
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u32 flags, struct gk20a_as_share **out);
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/**
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* @brief Retrieve the instance of gk20a from a gk20a_as instance.
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*
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* @param as [in] The address space
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*
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* Given an instance of gk20a_as, retrieve a pointer to the underlying gk20a
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* instance.
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*
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* @return pointer to the underlying GPU (gk20a).
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*/
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struct gk20a *gk20a_from_as(struct gk20a_as *as);
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#endif /* NVGPU_AS_H */
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