/*
* Copyright (c) 2017-2018, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <nvgpu/ltc.h>
#include <nvgpu/dma.h>
#include <nvgpu/nvgpu_mem.h>
#include "gk20a/gk20a.h"
#include "gk20a/gr_gk20a.h"
int nvgpu_init_ltc_support(struct gk20a *g)
{
nvgpu_spinlock_init(&g->ltc_enabled_lock);
g->mm.ltc_enabled_current = true;
g->mm.ltc_enabled_target = true;
if (g->ops.ltc.init_fs_state)
g->ops.ltc.init_fs_state(g);
return 0;
}
void nvgpu_ltc_sync_enabled(struct gk20a *g)
{
if (!g->ops.ltc.set_enabled)
return;
nvgpu_spinlock_acquire(&g->ltc_enabled_lock);
if (g->mm.ltc_enabled_current != g->mm.ltc_enabled_target) {
g->ops.ltc.set_enabled(g, g->mm.ltc_enabled_target);
g->mm.ltc_enabled_current = g->mm.ltc_enabled_target;
}
nvgpu_spinlock_release(&g->ltc_enabled_lock);
}
int nvgpu_ltc_alloc_cbc(struct gk20a *g, size_t compbit_backing_size)
{
struct gr_gk20a *gr = &g->gr;
unsigned long flags = 0;
if (nvgpu_mem_is_valid(&gr->compbit_store.mem))
return 0;
if (!nvgpu_iommuable(g))
flags = NVGPU_DMA_FORCE_CONTIGUOUS;
return nvgpu_dma_alloc_flags_sys(g,
flags,
compbit_backing_size,
&gr->compbit_store.mem);
}
