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video: tegra: nvmap: Add DT based API disabling support

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There are debug/duplicate APIs like NvRmMemGetIVCId,
NvRmMemHandleFromIVCId, NvRmMemWrite etc. which don't have corresponding
requirements in DriveOS 7.0 Linux NSR. We have taken sign-off from the
stakeholders to confirm that they are not using these APIs in T264 Linux
Prod NSR variant. But some of them are using these APIs in dev-nsr and
did not agree to remove it from dev-nsr, L4T, HOS etc. Hence we need to
make sure that they do not accidentally start using these APIs. Hence
add following DT based disabling support.

- Add disable-debug-support property in tegra-carveouts DT node in T264
prod nsr dts.
- Parse this DT node in nvmap and if the above property is present then
BUG_ON in the ioctl functions corresponding to these APIs.

Bug 4980348

Change-Id: Icdd5aadf3197d0649b61d285f433fa65ea69e806
Signed-off-by: Ketan Patil <ketanp@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3298507
Reviewed-by: Pritesh Raithatha <praithatha@nvidia.com>
Reviewed-by: Ashish Mhetre <amhetre@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
This commit is contained in:
Ketan Patil
2025-01-24 17:05:42 +00:00
committed by Jon Hunter
parent b45d59c4a6
commit 268a87ecfa
3 changed files with 25 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/video/tegra/nvmap/nvmap_dev.c
View File

@@ -549,6 +549,23 @@ exit:
return memory_available;
}
/*
* Read disable-debug-support property from tegra-carveouts DT node.
* If the property is present then don't support any extra APIs other than
* the APIs mentioned in ICD, by doing BUG_ON in the corresponding ioctls.
* So it is necessary to be present in the DT of the respective builds
* (e.g. Prod NSR Build).
*/
static void nvmap_support_debug_apis(struct platform_device *pdev, struct nvmap_device *dev)
{
struct device_node *np = pdev->dev.of_node;
if (of_property_read_bool(np, "disable-debug-support"))
dev->support_debug_features = 0;
else
dev->support_debug_features = 1;
}
int __init nvmap_probe(struct platform_device *pdev)
{
struct nvmap_platform_data *plat;
@@ -653,6 +670,8 @@ int __init nvmap_probe(struct platform_device *pdev)
dev->dev_user.name);
goto fail_sci_ipc;
}
(void)nvmap_support_debug_apis(pdev, dev);
goto finish;
fail_sci_ipc:
nvmap_sci_ipc_exit();

3
drivers/video/tegra/nvmap/nvmap_dev.h
View File

@@ -1,5 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/* SPDX-FileCopyrightText: Copyright (c) 2009-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
/* SPDX-FileCopyrightText: Copyright (c) 2009-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
#ifndef __NVMAP_DEV_H
#define __NVMAP_DEV_H
@@ -109,6 +109,7 @@ struct nvmap_device {
struct rb_root device_names;
#endif /* NVMAP_CONFIG_DEBUG_MAPS */
u64 serial_id_counter; /* This is global counter common across different client processes */
bool support_debug_features;
};
#define NVMAP_TAG_TRACE(x, ...) \

4
drivers/video/tegra/nvmap/nvmap_ioctl.c
View File

@@ -658,6 +658,8 @@ int nvmap_ioctl_get_ivcid(struct file *filp, void __user *arg)
struct nvmap_create_handle op;
struct nvmap_handle *h = NULL;
BUG_ON(nvmap_dev->support_debug_features == 0);
if (copy_from_user(&op, arg, sizeof(op)))
return -EFAULT;
@@ -712,6 +714,8 @@ int nvmap_ioctl_create_from_ivc(struct file *filp, void __user *arg)
unsigned int peer;
struct nvmap_heap_block *block = NULL;
BUG_ON(nvmap_dev->support_debug_features == 0);
/* First create a new handle and then fake carveout allocation */
if (copy_from_user(&op, arg, sizeof(op)))
return -EFAULT;