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gpu: nvgpu: add user API to get read-only syncpoint address map

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Add User space API NVGPU_AS_IOCTL_GET_SYNC_RO_MAP to get read-only syncpoint
address map in user space

We already map whole syncpoint shim to each address space with base address
being vm->syncpt_ro_map_gpu_va

This new API exposes this base GPU_VA address of syncpoint map, and unit size
of each syncpoint to user space.
User space can then calculate address of each syncpoint as
syncpoint_address = base_gpu_va + (syncpoint_id * syncpoint_unit_size)

Note that this syncpoint address is read_only, and should be only used for
inserting semaphore acquires.
Adding semaphore release with this address would result in MMU_FAULT

Define new HAL g->ops.fifo.get_sync_ro_map and set this for all GPUs supported
on Xavier SoC

Bug 200327559

Change-Id: Ica0db48fc28fdd0ff2a5eb09574dac843dc5e4fd
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1649365
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Deepak Nibade
2018-01-16 03:07:37 -08:00
committed by mobile promotions
parent 0c8deb74af
commit f0cbe19b12
16 changed files with 167 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/gpu/nvgpu/common/linux/ioctl_as.c
View File

@@ -1,7 +1,7 @@
/*
* GK20A Address Spaces
*
* Copyright (c) 2011-2017, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2011-2018, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -256,6 +256,33 @@ static int gk20a_as_ioctl_get_va_regions(
return 0;
}
static int nvgpu_as_ioctl_get_sync_ro_map(
struct gk20a_as_share *as_share,
struct nvgpu_as_get_sync_ro_map_args *args)
{
#ifdef CONFIG_TEGRA_GK20A_NVHOST
struct vm_gk20a *vm = as_share->vm;
struct gk20a *g = gk20a_from_vm(vm);
u64 base_gpuva;
u32 sync_size;
int err = 0;
if (!g->ops.fifo.get_sync_ro_map)
return -EINVAL;
err = g->ops.fifo.get_sync_ro_map(vm, &base_gpuva, &sync_size);
if (err)
return err;
args->base_gpuva = base_gpuva;
args->sync_size = sync_size;
return err;
#else
return -EINVAL;
#endif
}
int gk20a_as_dev_open(struct inode *inode, struct file *filp)
{
struct nvgpu_os_linux *l;
@@ -367,6 +394,10 @@ long gk20a_as_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
err = gk20a_as_ioctl_map_buffer_batch(as_share,
(struct nvgpu_as_map_buffer_batch_args *)buf);
break;
case NVGPU_AS_IOCTL_GET_SYNC_RO_MAP:
err = nvgpu_as_ioctl_get_sync_ro_map(as_share,
(struct nvgpu_as_get_sync_ro_map_args *)buf);
break;
default:
err = -ENOTTY;
break;