mirror of
git://nv-tegra.nvidia.com/linux-nv-oot.git
synced 2025-12-22 17:25:35 +03:00
f535883c6a
The VIC and NVDEC drivers contain some duplicated code. Start chipping away at that by introducing a helper for programming the TRANSCFG and STREAMID registers. Bug 3778105 Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Change-Id: I30f9cf3fb8fb89fa5abf5f5e17ba41649a42097e Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2771766 (cherry picked from commit 27872b2f90d66d8706594f5903cff4d2b1e88be4) Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2759058 Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com> Tested-by: Jonathan Hunter <jonathanh@nvidia.com>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2022, NVIDIA Corporation.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/iommu.h>
|
|
|
|
#include "util.h"
|
|
|
|
#define THI_STREAMID0 0x30
|
|
#define THI_STREAMID1 0x34
|
|
|
|
#define TRANSCFG_ATT(i, v) (((v) & 0x3) << (i * 4))
|
|
#define TRANSCFG_SID_HW 0
|
|
#define TRANSCFG_SID_PHY 1
|
|
#define TRANSCFG_SID_FALCON 2
|
|
|
|
void tegra_drm_program_iommu_regs(struct device *dev, void __iomem *regs, u32 transcfg_offset)
|
|
{
|
|
#ifdef CONFIG_IOMMU_API
|
|
struct iommu_fwspec *spec = dev_iommu_fwspec_get(dev);
|
|
|
|
if (spec) {
|
|
u32 value;
|
|
|
|
value = TRANSCFG_ATT(1, TRANSCFG_SID_FALCON) |
|
|
TRANSCFG_ATT(0, TRANSCFG_SID_HW);
|
|
writel(value, regs + transcfg_offset);
|
|
|
|
if (spec->num_ids > 0) {
|
|
value = spec->ids[0] & 0xffff;
|
|
|
|
/*
|
|
* STREAMID0 is used for input/output buffers.
|
|
* Initialize it to the firmware stream ID in case context isolation
|
|
* is not enabled, and the firmware stream ID is used for both firmware
|
|
* and data buffers.
|
|
*
|
|
* If context isolation is enabled, it will be
|
|
* overridden by the SETSTREAMID opcode as part of each job.
|
|
*/
|
|
writel(value, regs + THI_STREAMID0);
|
|
|
|
/* STREAMID1 is used usually for firmware loading. */
|
|
writel(value, regs + THI_STREAMID1);
|
|
}
|
|
}
|
|
#endif
|
|
}
|