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5d09c908b0
Allow userspace to control directly the PTE kind for the mappings by supplying NVGPU_AS_MAP_BUFFER_FLAGS_DIRECT_KIND_CTRL for MAP_BUFFER_EX. In particular, in this mode, the userspace will tell the kernel whether the kind is compressible, and if so, what is the incompressible fallback kind. By supplying only the compressible kind, the userspace can require that the map kind will not be demoted to the incompressible fallback kind in case of comptag allocation failure. Add also a GPU characteristics flag NVGPU_GPU_FLAGS_SUPPORT_MAP_DIRECT_KIND_CTRL to signal whether direct kind control is supported. Fix indentation of nvgpu_as_map_buffer_ex_args header comment. Bug 1705731 Change-Id: I317ab474ae53b78eb8fdd31bd6bca0541fcba9a4 Signed-off-by: Sami Kiminki <skiminki@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1543462 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Konsta Holtta <kholtta@nvidia.com> Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com> Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
/*
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* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __COMMON_LINUX_VM_PRIV_H__
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#define __COMMON_LINUX_VM_PRIV_H__
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#include <nvgpu/types.h>
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struct sg_table;
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struct dma_buf;
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struct vm_gk20a;
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struct vm_gk20a_mapping_batch;
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struct buffer_attrs {
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struct sg_table *sgt;
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u64 size;
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u64 align;
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u32 ctag_offset;
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u32 ctag_lines;
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u32 ctag_allocated_lines;
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int pgsz_idx;
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u8 kind_v;
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bool use_kind_v;
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u8 uc_kind_v;
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bool use_uc_kind_v;
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bool ctag_user_mappable;
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};
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u64 nvgpu_vm_map(struct vm_gk20a *vm,
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struct dma_buf *dmabuf,
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u64 offset_align,
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u32 flags,
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/*
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* compressible kind if
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* NVGPU_AS_MAP_BUFFER_FLAGS_DIRECT_KIND_CTRL is
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* specified, otherwise just the kind
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*/
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s16 compr_kind,
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/*
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* incompressible kind if
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* NVGPU_AS_MAP_BUFFER_FLAGS_DIRECT_KIND_CTRL is
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* specified, otherwise ignored
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*/
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s16 incompr_kind,
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bool user_mapped,
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int rw_flag,
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u64 buffer_offset,
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u64 mapping_size,
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struct vm_gk20a_mapping_batch *mapping_batch);
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/*
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* Notes:
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* - Batch may be NULL if map op is not part of a batch.
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* - If NVGPU_AS_MAP_BUFFER_FLAGS_DIRECT_KIND_CTRL is set,
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* compr_kind and incompr_kind work as explained in nvgpu.h.
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* - If NVGPU_AS_MAP_BUFFER_FLAGS_DIRECT_KIND_CTRL is NOT set,
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* compr_kind holds the kind and kernel will figure out whether
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* it is a compressible or incompressible kind. If compressible, kernel will
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* also figure out the incompressible counterpart or return an error.
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*/
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int nvgpu_vm_map_buffer(struct vm_gk20a *vm,
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int dmabuf_fd,
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u64 *offset_align,
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u32 flags, /* NVGPU_AS_MAP_BUFFER_FLAGS_ */
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s16 compr_kind,
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s16 incompr_kind,
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u64 buffer_offset,
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u64 mapping_size,
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struct vm_gk20a_mapping_batch *batch);
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void nvgpu_vm_unmap(struct vm_gk20a *vm, u64 offset);
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/* find buffer corresponding to va */
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int nvgpu_vm_find_buffer(struct vm_gk20a *vm, u64 gpu_va,
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struct dma_buf **dmabuf,
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u64 *offset);
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enum nvgpu_aperture gk20a_dmabuf_aperture(struct gk20a *g,
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struct dma_buf *dmabuf);
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int validate_fixed_buffer(struct vm_gk20a *vm,
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struct buffer_attrs *bfr,
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u64 map_offset, u64 map_size,
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struct nvgpu_vm_area **pva_node);
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int setup_buffer_kind_and_compression(struct vm_gk20a *vm,
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u32 flags,
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struct buffer_attrs *bfr,
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enum gmmu_pgsz_gk20a pgsz_idx);
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int gk20a_alloc_comptags(struct gk20a *g,
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struct device *dev,
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struct dma_buf *dmabuf,
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struct gk20a_comptag_allocator *allocator,
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u32 lines);
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#endif
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