mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-22 17:36:20 +03:00
9355345610
When GPU need to programmed with PA(physical address), given IPA need to be converted to PA by querying Hypervisor. As this is an IPC between OSes, the call will reduce the performance badly. So this is adding a IPA-PA cache to improve the performance. This will be more helpful in passthr config. Bug 3277194 Change-Id: I6a3230d858977313a0ed0f33068055a3b516330a Signed-off-by: dt <dt@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2571814 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2021, 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.
|
|
*/
|
|
#ifdef CONFIG_TEGRA_HV_MANAGER
|
|
#include <nvgpu/gk20a.h>
|
|
#include <nvgpu/timers.h>
|
|
#include <nvgpu/ipa_pa_cache.h>
|
|
#include <soc/tegra/virt/syscalls.h>
|
|
|
|
static u64 nvgpu_ipa_to_pa_cache_lookup(struct gk20a *g, u64 ipa,
|
|
u64 *pa_len)
|
|
{
|
|
struct nvgpu_ipa_desc *desc;
|
|
struct nvgpu_ipa_pa_cache *ipa_cache;
|
|
u32 i = 0U;
|
|
u64 pa = 0UL;
|
|
|
|
ipa_cache = &(g->ipa_pa_cache);
|
|
desc = &(ipa_cache->ipa[0]);
|
|
|
|
for (i = 0; i < ipa_cache->num_ipa_desc; ++i, ++desc) {
|
|
if (ipa >= desc->ipa_base &&
|
|
(ipa < (desc->ipa_base + desc->ipa_size))) {
|
|
pa = ipa - desc->ipa_base + desc->pa_base;
|
|
if (pa_len != NULL) {
|
|
*pa_len = desc->ipa_size -(ipa - desc->ipa_base);
|
|
}
|
|
|
|
return pa;
|
|
}
|
|
}
|
|
|
|
return 0U;
|
|
}
|
|
|
|
u64 nvgpu_ipa_to_pa_cache_lookup_locked(struct gk20a *g, u64 ipa,
|
|
u64 *pa_len)
|
|
{
|
|
struct nvgpu_ipa_pa_cache *ipa_cache;
|
|
u64 pa = 0UL;
|
|
|
|
ipa_cache = &(g->ipa_pa_cache);
|
|
nvgpu_rwsem_down_read(&(ipa_cache->ipa_pa_rw_lock));
|
|
pa = nvgpu_ipa_to_pa_cache_lookup(g, ipa, pa_len);
|
|
nvgpu_rwsem_up_read(&(ipa_cache->ipa_pa_rw_lock));
|
|
return pa;
|
|
}
|
|
|
|
void nvgpu_ipa_to_pa_add_to_cache(struct gk20a *g, u64 ipa, u64 pa,
|
|
struct hyp_ipa_pa_info *info)
|
|
{
|
|
struct nvgpu_ipa_pa_cache *ipa_cache;
|
|
struct nvgpu_ipa_desc *desc = NULL;
|
|
u64 pa_cached = 0U;
|
|
|
|
ipa_cache = &(g->ipa_pa_cache);
|
|
nvgpu_rwsem_down_write(&(ipa_cache->ipa_pa_rw_lock));
|
|
pa_cached = nvgpu_ipa_to_pa_cache_lookup(g, ipa, NULL);
|
|
if (pa_cached != 0UL) {
|
|
/* Check any other context insert the translation
|
|
* already and return.
|
|
*/
|
|
nvgpu_assert(pa_cached == pa);
|
|
nvgpu_rwsem_up_write(&(ipa_cache->ipa_pa_rw_lock));
|
|
return;
|
|
}
|
|
|
|
if (ipa_cache->num_ipa_desc >= MAX_IPA_PA_CACHE) {
|
|
desc = &ipa_cache->ipa[nvgpu_current_time_ns() %
|
|
MAX_IPA_PA_CACHE];
|
|
} else {
|
|
desc = &ipa_cache->ipa[ipa_cache->num_ipa_desc++];
|
|
}
|
|
|
|
desc->ipa_base = ipa - info->offset;
|
|
desc->ipa_size = info->size;
|
|
desc->pa_base = info->base;
|
|
nvgpu_rwsem_up_write(&(ipa_cache->ipa_pa_rw_lock));
|
|
|
|
}
|
|
#endif
|