linux-kernel - [PATCH drm-misc-next v4 2/8] drm/gpuvm: allow building as module

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Date:   Wed, 20 Sep 2023 16:42:35 +0200
From:   Danilo Krummrich <dakr@...hat.com>
To:     airlied@...il.com, daniel@...ll.ch, matthew.brost@...el.com,
        thomas.hellstrom@...ux.intel.com, sarah.walker@...tec.com,
        donald.robson@...tec.com, boris.brezillon@...labora.com,
        christian.koenig@....com, faith.ekstrand@...labora.com
Cc:     dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Danilo Krummrich <dakr@...hat.com>
Subject: [PATCH drm-misc-next v4 2/8] drm/gpuvm: allow building as module

Currently, the DRM GPUVM does not have any core dependencies preventing
a module build.

Also, new features from subsequent patches require helpers (namely
drm_exec) which can be built as module.

Reviewed-by: Christian König <christian.koenig@....com>
Signed-off-by: Danilo Krummrich <dakr@...hat.com>
---
 drivers/gpu/drm/Kconfig         | 7 +++++++
 drivers/gpu/drm/Makefile        | 2 +-
 drivers/gpu/drm/drm_gpuvm.c     | 3 +++
 drivers/gpu/drm/nouveau/Kconfig | 1 +
 4 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index ab9ef1c20349..0f78a03e4e84 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -216,6 +216,13 @@ config DRM_EXEC
 	help
 	  Execution context for command submissions
 
+config DRM_GPUVM
+	tristate
+	depends on DRM && DRM_EXEC
+	help
+	  GPU-VM representation providing helpers to manage a GPUs virtual
+	  address space
+
 config DRM_BUDDY
 	tristate
 	depends on DRM
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 7a84b3cddeab..8e1bde059170 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -45,7 +45,6 @@ drm-y := \
 	drm_vblank.o \
 	drm_vblank_work.o \
 	drm_vma_manager.o \
-	drm_gpuvm.o \
 	drm_writeback.o
 drm-$(CONFIG_DRM_LEGACY) += \
 	drm_agpsupport.o \
@@ -81,6 +80,7 @@ obj-$(CONFIG_DRM_PANEL_ORIENTATION_QUIRKS) += drm_panel_orientation_quirks.o
 #
 #
 obj-$(CONFIG_DRM_EXEC) += drm_exec.o
+obj-$(CONFIG_DRM_GPUVM) += drm_gpuvm.o
 
 obj-$(CONFIG_DRM_BUDDY) += drm_buddy.o
 
diff --git a/drivers/gpu/drm/drm_gpuvm.c b/drivers/gpu/drm/drm_gpuvm.c
index 7074bcad5b28..bfea4a8a19ec 100644
--- a/drivers/gpu/drm/drm_gpuvm.c
+++ b/drivers/gpu/drm/drm_gpuvm.c
@@ -1723,3 +1723,6 @@ drm_gpuva_ops_free(struct drm_gpuvm *gpuvm,
 	kfree(ops);
 }
 EXPORT_SYMBOL_GPL(drm_gpuva_ops_free);
+
+MODULE_DESCRIPTION("DRM GPUVM");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
index c52e8096cca4..1e6aaf95ff7c 100644
--- a/drivers/gpu/drm/nouveau/Kconfig
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -11,6 +11,7 @@ config DRM_NOUVEAU
 	select DRM_TTM
 	select DRM_TTM_HELPER
 	select DRM_EXEC
+	select DRM_GPUVM
 	select DRM_SCHED
 	select I2C
 	select I2C_ALGOBIT
-- 
2.41.0