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From f90c388c755a6bd9b72cb51c712a0ae686e0b377 Mon Sep 17 00:00:00 2001
From: Alberto Milone <alberto.milone@canonical.com>
Date: Wed, 27 Nov 2019 13:01:18 +0100
Subject: [PATCH 1/1] Add support for Linux 5.4
---
conftest.sh | 46 ++++++++++++++++++++++++++++++++++++++++
nv-drm.c | 9 +++++---
nvidia-modules-common.mk | 2 +-
3 files changed, 53 insertions(+), 4 deletions(-)
diff --git a/conftest.sh b/conftest.sh
index fb0bf60..babbb50 100755
--- a/conftest.sh
+++ b/conftest.sh
@@ -265,6 +265,23 @@ build_cflags() {
if [ -n "$BUILD_PARAMS" ]; then
CFLAGS="$CFLAGS -D$BUILD_PARAMS"
fi
+
+ # Check if gcc supports asm goto and set CC_HAVE_ASM_GOTO if it does.
+ # Older kernels perform this check and set this flag in Kbuild, and since
+ # conftest.sh runs outside of Kbuild it ends up building without this flag.
+ # Starting with commit e9666d10a5677a494260d60d1fa0b73cc7646eb3 this test
+ # is done within Kconfig, and the preprocessor flag is no longer needed.
+
+ GCC_GOTO_SH="$SOURCES/build/gcc-goto.sh"
+
+ if [ -f "$GCC_GOTO_SH" ]; then
+ # Newer versions of gcc-goto.sh don't print anything on success, but
+ # this is okay, since it's no longer necessary to set CC_HAVE_ASM_GOTO
+ # based on the output of those versions of gcc-goto.sh.
+ if [ `/bin/sh "$GCC_GOTO_SH" "$CC"` = "y" ]; then
+ CFLAGS="$CFLAGS -DCC_HAVE_ASM_GOTO"
+ fi
+ fi
}
CONFTEST_PREAMBLE="#include \"conftest.h\"
@@ -1521,6 +1538,35 @@ compile_test() {
compile_check_conftest "$CODE" "NV_DRM_AVAILABLE" "" "generic"
;;
+ drm_driver_prime_flag_present)
+ #
+ # Determine whether driver feature flag DRIVER_PRIME is present.
+ #
+ # The DRIVER_PRIME flag was added by commit 3248877ea179 (drm:
+ # base prime/dma-buf support (v5)) in v3.4 (2011-11-25) and is
+ # removed by commit 0424fdaf883a (drm/prime: Actually remove
+ # DRIVER_PRIME everywhere) on 2019-06-17.
+ #
+ # DRIVER_PRIME definition moved from drmP.h to drm_drv.h by
+ # commit 85e634bce01a (drm: Extract drm_drv.h) in v4.10
+ # (2016-11-14).
+ #
+ # DRIVER_PRIME define is changed to enum value by commit
+ # 0e2a933b02c9 (drm: Switch DRIVER_ flags to an enum) in v5.1
+ # (2019-01-29).
+ #
+ CODE="
+ #include <drm/drmP.h>
+ #if defined(NV_DRM_DRM_DRV_H_PRESENT)
+ #include <drm/drm_drv.h>
+ #endif
+ unsigned int drm_driver_prime_flag_present_conftest(void) {
+ return DRIVER_PRIME;
+ }"
+
+ compile_check_conftest "$CODE" "NV_DRM_DRIVER_PRIME_FLAG_PRESENT" "" "types"
+ ;;
+
proc_create_data)
#
# Determine if the proc_create_data() function is present.
diff --git a/nv-drm.c b/nv-drm.c
index 76719bb..12f7029 100644
--- a/nv-drm.c
+++ b/nv-drm.c
@@ -156,11 +156,14 @@ static const struct file_operations nv_drm_fops = {
};
static struct drm_driver nv_drm_driver = {
+ .driver_features =
+#if defined(NV_DRM_DRIVER_PRIME_FLAG_PRESENT)
+ DRIVER_PRIME |
+#endif
#if defined(DRIVER_LEGACY) || LINUX_VERSION_CODE >= KERNEL_VERSION(5, 1, 0)
- .driver_features = DRIVER_GEM | DRIVER_PRIME | DRIVER_LEGACY,
-#else
- .driver_features = DRIVER_GEM | DRIVER_PRIME,
+ DRIVER_LEGACY |
#endif
+ DRIVER_GEM,
.load = nv_drm_load,
.unload = nv_drm_unload,
.fops = &nv_drm_fops,
diff --git a/nvidia-modules-common.mk b/nvidia-modules-common.mk
index 8ac7058..7418005 100644
--- a/nvidia-modules-common.mk
+++ b/nvidia-modules-common.mk
@@ -180,7 +180,7 @@ ifndef NV_VERBOSE
endif
KBUILD_PARAMS += KBUILD_VERBOSE=$(NV_VERBOSE)
-KBUILD_PARAMS += -C $(KERNEL_SOURCES) SUBDIRS=$(PWD)
+KBUILD_PARAMS += -C $(KERNEL_SOURCES) M=$(PWD)
KBUILD_PARAMS += ARCH=$(ARCH)
#
--
2.20.1
|