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platform: tegra: dce: Use conftest

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Instead of relying on kernel version to determine if the 'tegra_ivc'
structure has a member that is of type 'struct iosys_map', add a compile
time test to the conftest.sh script to determine this at compile time
for the kernel being used. This is beneficial for working with 3rd party
Linux kernels that may have back-ported upstream changes into their
kernel and so the kernel version checks do not work.

Bug 4119327

Change-Id: Ia993ca9df7694347252a795c7dee1e95f2f9fa2f
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2985743
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Jon Hunter
2023-09-26 11:13:28 +01:00
committed by mobile promotions
parent 02d724565b
commit 19fb93666d
4 changed files with 32 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/platform/tegra/dce/dce-ipc.c
View File

@@ -3,7 +3,7 @@
* Copyright (c) 2019-2023, NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/version.h>
#include <nvidia/conftest.h>
#include <dce.h>
#include <dce-ipc.h>
@@ -281,7 +281,7 @@ int dce_ipc_channel_init(struct tegra_dce *d, u32 ch_type)
struct dce_ipc_region *r;
struct dce_ipc_channel *ch;
struct dce_ipc_queue_info *q_info;
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP) /* Linux v6.2 */
struct iosys_map rx, tx;
#endif
@@ -333,7 +333,7 @@ int dce_ipc_channel_init(struct tegra_dce *d, u32 ch_type)
dev = dev_from_dce(d);
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP) /* Linux v6.2 */
iosys_map_set_vaddr(&rx, r->base + r->s_offset);
iosys_map_set_vaddr(&tx, r->base + r->s_offset + q_sz);
@@ -516,7 +516,7 @@ void dce_ipc_channel_reset(struct tegra_dce *d, u32 ch_type)
*/
static int _dce_ipc_get_next_write_buff(struct dce_ipc_channel *ch)
{
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP) /* Linux v6.2 */
int err;
err = tegra_ivc_write_get_next_frame(&ch->d_ivc, &ch->obuff);
@@ -558,7 +558,7 @@ static int _dce_ipc_write_channel(struct dce_ipc_channel *ch,
* of the IVC frame
*/
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP) /* Linux v6.2 */
if ((ch->flags & DCE_IPC_CHANNEL_MSG_HEADER) != 0U) {
iosys_map_wr_field(&ch->obuff, 0, struct dce_ipc_header, length,
size);
@@ -633,7 +633,7 @@ out:
*/
static int _dce_ipc_get_next_read_buff(struct dce_ipc_channel *ch)
{
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP) /* Linux v6.2 */
int err;
err = tegra_ivc_read_get_next_frame(&ch->d_ivc, &ch->ibuff);
@@ -674,7 +674,7 @@ static int _dce_ipc_read_channel(struct dce_ipc_channel *ch,
* Get actual length information from the top
* of the IVC frame
*/
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP) /* Linux v6.2 */
if ((ch->flags & DCE_IPC_CHANNEL_MSG_HEADER) != 0U) {
iosys_map_wr_field(&ch->ibuff, 0, struct dce_ipc_header, length,
size);
@@ -837,7 +837,7 @@ int dce_ipc_get_region_iova_info(struct tegra_dce *d, u64 *iova, u32 *size)
bool dce_ipc_is_data_available(struct tegra_dce *d, u32 ch_type)
{
bool ret = false;
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP) /* Linux v6.2 */
struct iosys_map map;
#else
void *frame;
@@ -846,7 +846,7 @@ bool dce_ipc_is_data_available(struct tegra_dce *d, u32 ch_type)
dce_mutex_lock(&ch->lock);
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP) /* Linux v6.2 */
if (!tegra_ivc_read_get_next_frame(&ch->d_ivc, &map))
ret = true;
#else

5
drivers/platform/tegra/dce/include/dce-ipc.h
View File

@@ -6,7 +6,8 @@
#ifndef DCE_IPC_H
#define DCE_IPC_H
#include <linux/version.h>
#include <nvidia/conftest.h>
#include <dce-lock.h>
#include <soc/tegra/ivc.h>
#include <interface/dce-admin-cmds.h>
@@ -121,7 +122,7 @@ struct dce_ipc_channel {
u32 w_type;
u32 ch_type;
u32 ipc_type;
#if (KERNEL_VERSION(6, 2, 0) <= LINUX_VERSION_CODE)
#if defined(NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP)
struct iosys_map ibuff;
struct iosys_map obuff;
#else

1
scripts/conftest/Makefile
View File

@@ -101,6 +101,7 @@ NV_CONFTEST_FUNCTION_COMPILE_TESTS += drm_mode_config_struct_has_fb_base_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += iio_dev_opaque_has_mlock
NV_CONFTEST_FUNCTION_COMPILE_TESTS += iommu_map_has_gfp_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += register_shrinker_has_fmt_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += tegra_ivc_struct_has_iosys_map
NV_CONFTEST_GENERIC_COMPILE_TESTS ?=
NV_CONFTEST_MACRO_COMPILE_TESTS ?=
NV_CONFTEST_SYMBOL_COMPILE_TESTS ?=

19
scripts/conftest/conftest.sh
View File

@@ -6544,6 +6544,25 @@ compile_test() {
compile_check_conftest "$CODE" "NV_REGISTER_SHRINKER_HAS_FMT_ARG" "" "types"
;;
tegra_ivc_struct_has_iosys_map)
#
# Determine if the 'tegra_ivc' structure has the 'map' argument.
#
# Commit 4c1e0a97351a ("firmware: tegra: bpmp: Use iosys-map
# helpers") update the Tegra IVC driver to use iosys-map in Linux v6.2.
#
CODE="
#if defined(NV_LINUX_IOSYS_MAP_H_PRESENT)
#include <linux/iosys-map.h>
#endif
#include <soc/tegra/ivc.h>
struct iosys_map *conftest_tegra_ivc_struct_has_iosys_map(struct tegra_ivc *ivc) {
return &ivc->rx.map;
}"
compile_check_conftest "$CODE" "NV_TEGRA_IVC_STRUCT_HAS_IOSYS_MAP" "" "types"
;;
# When adding a new conftest entry, please use the correct format for
# specifying the relevant upstream Linux kernel commit.
#