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Message-Id: <20190410063815.17062-2-kraxel@redhat.com>
Date: Wed, 10 Apr 2019 08:38:13 +0200
From: Gerd Hoffmann <kraxel@...hat.com>
To: dri-devel@...ts.freedesktop.org
Cc: Gerd Hoffmann <kraxel@...hat.com>,
Dave Airlie <airlied@...hat.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Sean Paul <sean@...rly.run>,
virtualization@...ts.linux-foundation.org (open list:DRM DRIVER FOR
QEMU'S CIRRUS DEVICE), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 1/3] drm: switch drm_fb_memcpy_dstclip to accept __iomem dst
Not all archs have the __io_virt() macro, so cirrus can't simply convert
pointers that way. The drm format helpers have to use memcpy_toio()
instead.
This patch makes drm_fb_memcpy_dstclip() accept a __iomem dst pointer
and use memcpy_toio() instead of memcpy(). With that separating out the
memcpy loop into the drm_fb_memcpy_lines() helper isn't useful any more,
so move the code back into the calling functins.
Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
include/drm/drm_format_helper.h | 3 +-
drivers/gpu/drm/cirrus/cirrus.c | 2 +-
drivers/gpu/drm/drm_format_helper.c | 45 +++++++++++++++--------------
3 files changed, 27 insertions(+), 23 deletions(-)
diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h
index 6f84380757ee..bc2e1004e166 100644
--- a/include/drm/drm_format_helper.h
+++ b/include/drm/drm_format_helper.h
@@ -15,7 +15,8 @@ struct drm_rect;
void drm_fb_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip);
-void drm_fb_memcpy_dstclip(void *dst, void *vaddr, struct drm_framebuffer *fb,
+void drm_fb_memcpy_dstclip(void __iomem *dst, void *vaddr,
+ struct drm_framebuffer *fb,
struct drm_rect *clip);
void drm_fb_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip);
diff --git a/drivers/gpu/drm/cirrus/cirrus.c b/drivers/gpu/drm/cirrus/cirrus.c
index 5095b8ce52c2..0fc3aa31b5a4 100644
--- a/drivers/gpu/drm/cirrus/cirrus.c
+++ b/drivers/gpu/drm/cirrus/cirrus.c
@@ -307,7 +307,7 @@ static int cirrus_fb_blit_rect(struct drm_framebuffer *fb,
return -ENOMEM;
if (cirrus->cpp == fb->format->cpp[0])
- drm_fb_memcpy_dstclip(__io_virt(cirrus->vram),
+ drm_fb_memcpy_dstclip(cirrus->vram,
vmap, fb, rect);
else if (fb->format->cpp[0] == 4 && cirrus->cpp == 2)
diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c
index 00d716f14173..dace05638bc3 100644
--- a/drivers/gpu/drm/drm_format_helper.c
+++ b/drivers/gpu/drm/drm_format_helper.c
@@ -10,23 +10,17 @@
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/io.h>
#include <drm/drm_format_helper.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_rect.h>
-static void drm_fb_memcpy_lines(void *dst, unsigned int dst_pitch,
- void *src, unsigned int src_pitch,
- unsigned int linelength, unsigned int lines)
+static unsigned int clip_offset(struct drm_rect *clip,
+ unsigned int pitch, unsigned int cpp)
{
- int line;
-
- for (line = 0; line < lines; line++) {
- memcpy(dst, src, linelength);
- src += src_pitch;
- dst += dst_pitch;
- }
+ return clip->y1 * pitch + clip->x1 * cpp;
}
/**
@@ -43,35 +37,44 @@ void drm_fb_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip)
{
unsigned int cpp = drm_format_plane_cpp(fb->format->format, 0);
- unsigned int offset = (clip->y1 * fb->pitches[0]) + (clip->x1 * cpp);
size_t len = (clip->x2 - clip->x1) * cpp;
+ unsigned int y, lines = clip->y2 - clip->y1;
- drm_fb_memcpy_lines(dst, len,
- vaddr + offset, fb->pitches[0],
- len, clip->y2 - clip->y1);
+ vaddr += clip_offset(clip, fb->pitches[0], cpp);
+ for (y = 0; y < lines; y++) {
+ memcpy(dst, vaddr, len);
+ vaddr += fb->pitches[0];
+ dst += len;
+ }
}
EXPORT_SYMBOL(drm_fb_memcpy);
/**
* drm_fb_memcpy_dstclip - Copy clip buffer
- * @dst: Destination buffer
+ * @dst: Destination buffer (iomem)
* @vaddr: Source buffer
* @fb: DRM framebuffer
* @clip: Clip rectangle area to copy
*
* This function applies clipping on dst, i.e. the destination is a
- * full framebuffer but only the clip rect content is copied over.
+ * full (iomem) framebuffer but only the clip rect content is copied over.
*/
-void drm_fb_memcpy_dstclip(void *dst, void *vaddr, struct drm_framebuffer *fb,
+void drm_fb_memcpy_dstclip(void __iomem *dst, void *vaddr,
+ struct drm_framebuffer *fb,
struct drm_rect *clip)
{
unsigned int cpp = drm_format_plane_cpp(fb->format->format, 0);
- unsigned int offset = (clip->y1 * fb->pitches[0]) + (clip->x1 * cpp);
+ unsigned int offset = clip_offset(clip, fb->pitches[0], cpp);
size_t len = (clip->x2 - clip->x1) * cpp;
+ unsigned int y, lines = clip->y2 - clip->y1;
- drm_fb_memcpy_lines(dst + offset, fb->pitches[0],
- vaddr + offset, fb->pitches[0],
- len, clip->y2 - clip->y1);
+ vaddr += offset;
+ dst += offset;
+ for (y = 0; y < lines; y++) {
+ memcpy_toio(dst, vaddr, len);
+ vaddr += fb->pitches[0];
+ dst += fb->pitches[0];
+ }
}
EXPORT_SYMBOL(drm_fb_memcpy_dstclip);
--
2.18.1
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