[PATCH v4 06/15] media: videobuf2: Move frame_vector into media subsystem

From: Daniel Vetter
Date: Mon Oct 26 2020 - 07:00:11 EST

It's the only user. This also garbage collects the CONFIG_FRAME_VECTOR
symbol from all over the tree (well just one place, somehow omap media
driver still had this in its Kconfig, despite not using it).

Reviewed-by: John Hubbard <jhubbard@xxxxxxxxxx>
Acked-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
Cc: Pawel Osciak <pawel@xxxxxxxxxx>
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Cc: Tomasz Figa <tfiga@xxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-samsung-soc@xxxxxxxxxxxxxxx
Cc: linux-media@xxxxxxxxxxxxxxx
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
--
v3:
- Create a new frame_vector.h header for this (Mauro)
---
drivers/media/common/videobuf2/Kconfig | 1 -
drivers/media/common/videobuf2/Makefile | 1 +
.../media/common/videobuf2}/frame_vector.c | 2 +
drivers/media/platform/omap/Kconfig | 1 -
include/linux/mm.h | 42 -----------------
include/media/frame_vector.h | 47 +++++++++++++++++++
include/media/videobuf2-core.h | 1 +
mm/Kconfig | 3 --
mm/Makefile | 1 -
9 files changed, 51 insertions(+), 48 deletions(-)
rename {mm => drivers/media/common/videobuf2}/frame_vector.c (99%)
create mode 100644 include/media/frame_vector.h

diff --git a/drivers/media/common/videobuf2/Kconfig b/drivers/media/common/videobuf2/Kconfig
index edbc99ebba87..d2223a12c95f 100644
--- a/drivers/media/common/videobuf2/Kconfig
+++ b/drivers/media/common/videobuf2/Kconfig
@@ -9,7 +9,6 @@ config VIDEOBUF2_V4L2

config VIDEOBUF2_MEMOPS
tristate
- select FRAME_VECTOR

config VIDEOBUF2_DMA_CONTIG
tristate
diff --git a/drivers/media/common/videobuf2/Makefile b/drivers/media/common/videobuf2/Makefile
index 77bebe8b202f..54306f8d096c 100644
--- a/drivers/media/common/videobuf2/Makefile
+++ b/drivers/media/common/videobuf2/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
videobuf2-common-objs := videobuf2-core.o
+videobuf2-common-objs += frame_vector.o

ifeq ($(CONFIG_TRACEPOINTS),y)
videobuf2-common-objs += vb2-trace.o
diff --git a/mm/frame_vector.c b/drivers/media/common/videobuf2/frame_vector.c
similarity index 99%
rename from mm/frame_vector.c
rename to drivers/media/common/videobuf2/frame_vector.c
index d44779e56313..6590987c14bd 100644
--- a/mm/frame_vector.c
+++ b/drivers/media/common/videobuf2/frame_vector.c
@@ -8,6 +8,8 @@
#include <linux/pagemap.h>
#include <linux/sched.h>

+#include <media/frame_vector.h>
+
/**
* get_vaddr_frames() - map virtual addresses to pfns
* @start: starting user address
diff --git a/drivers/media/platform/omap/Kconfig b/drivers/media/platform/omap/Kconfig
index f73b5893220d..de16de46c0f4 100644
--- a/drivers/media/platform/omap/Kconfig
+++ b/drivers/media/platform/omap/Kconfig
@@ -12,6 +12,5 @@ config VIDEO_OMAP2_VOUT
depends on VIDEO_V4L2
select VIDEOBUF2_DMA_CONTIG
select OMAP2_VRFB if ARCH_OMAP2 || ARCH_OMAP3
- select FRAME_VECTOR
help
V4L2 Display driver support for OMAP2/3 based boards.
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 16b799a0522c..acd60fbf1a5a 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1743,48 +1743,6 @@ int account_locked_vm(struct mm_struct *mm, unsigned long pages, bool inc);
int __account_locked_vm(struct mm_struct *mm, unsigned long pages, bool inc,
struct task_struct *task, bool bypass_rlim);

-/* Container for pinned pfns / pages */
-struct frame_vector {
- unsigned int nr_allocated; /* Number of frames we have space for */
- unsigned int nr_frames; /* Number of frames stored in ptrs array */
- bool got_ref; /* Did we pin pages by getting page ref? */
- bool is_pfns; /* Does array contain pages or pfns? */
- void *ptrs[]; /* Array of pinned pfns / pages. Use
- * pfns_vector_pages() or pfns_vector_pfns()
- * for access */
-};
-
-struct frame_vector *frame_vector_create(unsigned int nr_frames);
-void frame_vector_destroy(struct frame_vector *vec);
-int get_vaddr_frames(unsigned long start, unsigned int nr_pfns,
- unsigned int gup_flags, struct frame_vector *vec);
-void put_vaddr_frames(struct frame_vector *vec);
-int frame_vector_to_pages(struct frame_vector *vec);
-void frame_vector_to_pfns(struct frame_vector *vec);
-
-static inline unsigned int frame_vector_count(struct frame_vector *vec)
-{
- return vec->nr_frames;
-}
-
-static inline struct page **frame_vector_pages(struct frame_vector *vec)
-{
- if (vec->is_pfns) {
- int err = frame_vector_to_pages(vec);
-
- if (err)
- return ERR_PTR(err);
- }
- return (struct page **)(vec->ptrs);
-}
-
-static inline unsigned long *frame_vector_pfns(struct frame_vector *vec)
-{
- if (!vec->is_pfns)
- frame_vector_to_pfns(vec);
- return (unsigned long *)(vec->ptrs);
-}
-
struct kvec;
int get_kernel_pages(const struct kvec *iov, int nr_pages, int write,
struct page **pages);
diff --git a/include/media/frame_vector.h b/include/media/frame_vector.h
new file mode 100644
index 000000000000..1ed0cd64510d
--- /dev/null
+++ b/include/media/frame_vector.h
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef _MEDIA_FRAME_VECTOR_H
+#define _MEDIA_FRAME_VECTOR_H
+
+/* Container for pinned pfns / pages in frame_vector.c */
+struct frame_vector {
+ unsigned int nr_allocated; /* Number of frames we have space for */
+ unsigned int nr_frames; /* Number of frames stored in ptrs array */
+ bool got_ref; /* Did we pin pages by getting page ref? */
+ bool is_pfns; /* Does array contain pages or pfns? */
+ void *ptrs[]; /* Array of pinned pfns / pages. Use
+ * pfns_vector_pages() or pfns_vector_pfns()
+ * for access */
+};
+
+struct frame_vector *frame_vector_create(unsigned int nr_frames);
+void frame_vector_destroy(struct frame_vector *vec);
+int get_vaddr_frames(unsigned long start, unsigned int nr_pfns,
+ unsigned int gup_flags, struct frame_vector *vec);
+void put_vaddr_frames(struct frame_vector *vec);
+int frame_vector_to_pages(struct frame_vector *vec);
+void frame_vector_to_pfns(struct frame_vector *vec);
+
+static inline unsigned int frame_vector_count(struct frame_vector *vec)
+{
+ return vec->nr_frames;
+}
+
+static inline struct page **frame_vector_pages(struct frame_vector *vec)
+{
+ if (vec->is_pfns) {
+ int err = frame_vector_to_pages(vec);
+
+ if (err)
+ return ERR_PTR(err);
+ }
+ return (struct page **)(vec->ptrs);
+}
+
+static inline unsigned long *frame_vector_pfns(struct frame_vector *vec)
+{
+ if (!vec->is_pfns)
+ frame_vector_to_pfns(vec);
+ return (unsigned long *)(vec->ptrs);
+}
+
+#endif /* _MEDIA_FRAME_VECTOR_H */
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index bbb3f26fbde9..d045e3a5a1d8 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -18,6 +18,7 @@
#include <linux/dma-buf.h>
#include <linux/bitops.h>
#include <media/media-request.h>
+#include <media/frame_vector.h>

#define VB2_MAX_FRAME (32)
#define VB2_MAX_PLANES (8)
diff --git a/mm/Kconfig b/mm/Kconfig
index 6c974888f86f..da6c943fe9f1 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -815,9 +815,6 @@ config DEVICE_PRIVATE
memory; i.e., memory that is only accessible from the device (or
group of devices). You likely also want to select HMM_MIRROR.

-config FRAME_VECTOR
- bool
-
config ARCH_USES_HIGH_VMA_FLAGS
bool
config ARCH_HAS_PKEYS
diff --git a/mm/Makefile b/mm/Makefile
index d5649f1c12c0..a025fd6c6afd 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -111,7 +111,6 @@ obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o
obj-$(CONFIG_CMA_DEBUGFS) += cma_debug.o
obj-$(CONFIG_USERFAULTFD) += userfaultfd.o
obj-$(CONFIG_IDLE_PAGE_TRACKING) += page_idle.o
-obj-$(CONFIG_FRAME_VECTOR) += frame_vector.o
obj-$(CONFIG_DEBUG_PAGE_REF) += debug_page_ref.o
obj-$(CONFIG_HARDENED_USERCOPY) += usercopy.o
obj-$(CONFIG_PERCPU_STATS) += percpu-stats.o
--
2.28.0