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001c7c3185
Make default big page size query a HAL op instead of per-platform constant. This allows querying for default big page size without accessing Linux specific gk20a_platform structure. JIRA NVGPU-38 Change-Id: Ibfbd1319764fdae5fdb06700fb64d23f6f3dd01a Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: https://git-master/r/1507928 Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit
157 lines
3.2 KiB
C
157 lines
3.2 KiB
C
/*
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* GK20A Address Spaces
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*
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* Copyright (c) 2011-2017, 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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#include <trace/events/gk20a.h>
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#include <nvgpu/kmem.h>
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#include <nvgpu/vm.h>
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#include "gk20a/gk20a.h"
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#include "gk20a/platform_gk20a.h"
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/* dumb allocator... */
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static int generate_as_share_id(struct gk20a_as *as)
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{
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gk20a_dbg_fn("");
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return ++as->last_share_id;
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}
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/* still dumb */
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static void release_as_share_id(struct gk20a_as *as, int id)
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{
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gk20a_dbg_fn("");
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return;
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}
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/* address space interfaces for the gk20a module */
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static int gk20a_vm_alloc_share(struct gk20a_as_share *as_share,
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u32 big_page_size, u32 flags)
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{
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struct gk20a_as *as = as_share->as;
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struct gk20a *g = gk20a_from_as(as);
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struct mm_gk20a *mm = &g->mm;
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struct vm_gk20a *vm;
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char name[32];
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const bool userspace_managed =
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(flags & NVGPU_GPU_IOCTL_ALLOC_AS_FLAGS_USERSPACE_MANAGED) != 0;
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gk20a_dbg_fn("");
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if (big_page_size == 0) {
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big_page_size = g->ops.mm.get_default_big_page_size();
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} else {
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if (!is_power_of_2(big_page_size))
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return -EINVAL;
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if (!(big_page_size & g->gpu_characteristics.available_big_page_sizes))
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return -EINVAL;
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}
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snprintf(name, sizeof(name), "as_%d", as_share->id);
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vm = nvgpu_vm_init(g, big_page_size,
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big_page_size << 10,
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mm->channel.kernel_size,
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mm->channel.user_size + mm->channel.kernel_size,
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!mm->disable_bigpage, userspace_managed, name);
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if (!vm)
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return -ENOMEM;
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as_share->vm = vm;
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vm->as_share = as_share;
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vm->enable_ctag = true;
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return 0;
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}
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int gk20a_as_alloc_share(struct gk20a *g,
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u32 big_page_size, u32 flags,
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struct gk20a_as_share **out)
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{
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struct gk20a_as_share *as_share;
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int err = 0;
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gk20a_dbg_fn("");
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g = gk20a_get(g);
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if (!g)
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return -ENODEV;
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*out = NULL;
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as_share = nvgpu_kzalloc(g, sizeof(*as_share));
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if (!as_share)
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return -ENOMEM;
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as_share->as = &g->as;
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as_share->id = generate_as_share_id(as_share->as);
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/* this will set as_share->vm. */
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err = gk20a_busy(g);
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if (err)
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goto failed;
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err = gk20a_vm_alloc_share(as_share, big_page_size, flags);
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gk20a_idle(g);
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if (err)
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goto failed;
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*out = as_share;
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return 0;
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failed:
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nvgpu_kfree(g, as_share);
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return err;
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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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struct vm_gk20a *vm = as_share->vm;
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gk20a_dbg_fn("");
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vm->as_share = NULL;
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as_share->vm = NULL;
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nvgpu_vm_put(vm);
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return 0;
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}
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/*
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* channels and the device nodes call this to release.
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* once the ref_cnt hits zero the share is deleted.
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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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struct gk20a *g = as_share->vm->mm->g;
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int err;
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gk20a_dbg_fn("");
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err = gk20a_busy(g);
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if (err)
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goto release_fail;
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err = gk20a_vm_release_share(as_share);
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gk20a_idle(g);
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release_fail:
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release_as_share_id(as_share->as, as_share->id);
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gk20a_put(g);
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nvgpu_kfree(g, as_share);
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return err;
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}
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