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9d2c9072c8
Implement NVGPU_GPU_IOCTL_ALLOC_AS_FLAGS_USERSPACE_MANAGED, which enables creating userspace-managed GPU address spaces. When an address space is marked as userspace-managed, the following changes are in effect: - Only fixed-address mappings are allowed. - VA space allocation for fixed-address mappings is not required, except to mark space as sparse. - Maps and unmaps are always immediate. In particular, the mapping ref increments at kickoffs and decrements at job completion are skipped. Bug 1614735 Bug 1623949 Bug 1660392 Change-Id: I834fe19b3f65e9b02c268952383eddee0e465759 Signed-off-by: Sami Kiminki <skiminki@nvidia.com> Reviewed-on: http://git-master/r/738558 Reviewed-on: http://git-master/r/833253 Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/*
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* GK20A Address Spaces
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*
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* Copyright (c) 2011-2015, 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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#ifndef AS_GK20A_H
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#define AS_GK20A_H
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#include <linux/atomic.h>
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#include <linux/cdev.h>
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#include <linux/fs.h>
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struct gk20a_as;
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struct gk20a_as_share;
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struct vm_gk20a;
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struct gk20a_as_share {
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struct gk20a_as *as;
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atomic_t ref_cnt;
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int id;
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struct vm_gk20a *vm;
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};
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struct gk20a_as {
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int last_share_id; /* dummy allocator for now */
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struct cdev cdev;
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struct device *node;
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};
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int gk20a_as_release_share(struct gk20a_as_share *as_share);
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/* struct file_operations driver interface */
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int gk20a_as_dev_open(struct inode *inode, struct file *filp);
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int gk20a_as_dev_release(struct inode *inode, struct file *filp);
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long gk20a_as_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
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/* if big_page_size == 0, the default big page size is used */
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int gk20a_as_alloc_share(struct gk20a_as *as, u32 big_page_size,
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u32 flags, struct gk20a_as_share **out);
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#endif
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