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Subject[PATCH 4/4] drm: add convert_lines_toio() variant, fix cirrus builds on powerpc.
Date
The __io_virt() macro is not available on all architectures, so cirrus
can't simply pass a pointer to io memory down to the format conversion
helpers. The format conversion helpers must use memcpy_toio() instead.

Add a convert_lines_toio() variant which does just that. Switch the
drm_fb_*_dstclip() functions used by cirrus to accept a __iomem pointer
as destination and pass that down to convert_lines_toio(). Fix the
calls in the cirrus driver to not use __io_virt() any more.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
include/drm/drm_format_helper.h | 9 ++--
drivers/gpu/drm/cirrus/cirrus.c | 6 +--
drivers/gpu/drm/drm_format_helper.c | 74 ++++++++++++++++++++++-------
3 files changed, 67 insertions(+), 22 deletions(-)

diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h
index 6f84380757ee..3532b76c2340 100644
--- a/include/drm/drm_format_helper.h
+++ b/include/drm/drm_format_helper.h
@@ -15,17 +15,20 @@ 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);
void drm_fb_xrgb8888_to_rgb565(void *dst, void *vaddr,
struct drm_framebuffer *fb,
struct drm_rect *clip, bool swap);
-void drm_fb_xrgb8888_to_rgb565_dstclip(void *dst, unsigned int dst_pitch,
+void drm_fb_xrgb8888_to_rgb565_dstclip(void __iomem *dst,
+ unsigned int dst_pitch,
void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip, bool swap);
-void drm_fb_xrgb8888_to_rgb888_dstclip(void *dst, unsigned int dst_pitch,
+void drm_fb_xrgb8888_to_rgb888_dstclip(void __iomem *dst,
+ unsigned int dst_pitch,
void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip);
void drm_fb_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
diff --git a/drivers/gpu/drm/cirrus/cirrus.c b/drivers/gpu/drm/cirrus/cirrus.c
index 5095b8ce52c2..be4ea370ba31 100644
--- a/drivers/gpu/drm/cirrus/cirrus.c
+++ b/drivers/gpu/drm/cirrus/cirrus.c
@@ -307,16 +307,16 @@ 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)
- drm_fb_xrgb8888_to_rgb565_dstclip(__io_virt(cirrus->vram),
+ drm_fb_xrgb8888_to_rgb565_dstclip(cirrus->vram,
cirrus->pitch,
vmap, fb, rect, false);

else if (fb->format->cpp[0] == 4 && cirrus->cpp == 3)
- drm_fb_xrgb8888_to_rgb888_dstclip(__io_virt(cirrus->vram),
+ drm_fb_xrgb8888_to_rgb888_dstclip(cirrus->vram,
cirrus->pitch,
vmap, fb, rect);

diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c
index 01d9ea134618..6a759cbaa263 100644
--- a/drivers/gpu/drm/drm_format_helper.c
+++ b/drivers/gpu/drm/drm_format_helper.c
@@ -11,6 +11,8 @@
#include <linux/module.h>
#include <linux/slab.h>

+#include <asm/io.h>
+
#include <drm/drm_format_helper.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_fourcc.h>
@@ -125,6 +127,30 @@ static void convert_lines(void *dst, unsigned int dst_pitch,
kfree(sbuf);
}

+static void convert_lines_toio(void __iomem *dst, unsigned int dst_pitch,
+ void *src, unsigned int src_pitch,
+ unsigned int pixels,
+ unsigned int lines,
+ struct drm_format_convert *conv)
+{
+ u32 dst_linelength = pixels * conv->dst_cpp;
+ u32 y;
+ void *dbuf;
+
+ dbuf = kmalloc(dst_linelength, GFP_KERNEL);
+ if (!dbuf)
+ return;
+
+ for (y = 0; y < lines; y++) {
+ conv->func(dbuf, src, pixels);
+ memcpy_toio(dst, dbuf, dst_linelength);
+ src += src_pitch;
+ dst += dst_pitch;
+ }
+
+ kfree(dbuf);
+}
+
static u32 clip_offset(struct drm_rect *clip, u32 pitch, u32 cpp)
{
return (clip->y1 * pitch) + (clip->x1 * cpp);
@@ -143,6 +169,19 @@ static void drm_fb_memcpy_lines(void *dst, unsigned int dst_pitch,
}
}

+static void drm_fb_memcpy_lines_toio(void __iomem *dst, unsigned int dst_pitch,
+ void *src, unsigned int src_pitch,
+ unsigned int linelength, unsigned int lines)
+{
+ int line;
+
+ for (line = 0; line < lines; line++) {
+ memcpy_toio(dst, src, linelength);
+ src += src_pitch;
+ dst += dst_pitch;
+ }
+}
+
/**
* drm_fb_memcpy - Copy clip buffer
* @dst: Destination buffer
@@ -176,16 +215,17 @@ EXPORT_SYMBOL(drm_fb_memcpy);
* This function applies clipping on dst, i.e. the destination is a
* full 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);
size_t len = (clip->x2 - clip->x1) * cpp;

- drm_fb_memcpy_lines(dst + offset, fb->pitches[0],
- vaddr + offset, fb->pitches[0],
- len, clip->y2 - clip->y1);
+ drm_fb_memcpy_lines_toio(dst + offset, fb->pitches[0],
+ vaddr + offset, fb->pitches[0],
+ len, clip->y2 - clip->y1);
}
EXPORT_SYMBOL(drm_fb_memcpy_dstclip);

@@ -245,7 +285,7 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565);

/**
* drm_fb_xrgb8888_to_rgb565_dstclip - Convert XRGB8888 to RGB565 clip buffer
- * @dst: RGB565 destination buffer
+ * @dst: RGB565 destination buffer (__iomem)
* @dst_pitch: destination buffer pitch
* @vaddr: XRGB8888 source buffer
* @fb: DRM framebuffer
@@ -256,9 +296,10 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565);
* support XRGB8888.
*
* This function applies clipping on dst, i.e. the destination is a
- * full framebuffer but only the clip rect content is copied over.
+ * full framebuffer, in iomem, but only the clip rect content is copied over.
*/
-void drm_fb_xrgb8888_to_rgb565_dstclip(void *dst, unsigned int dst_pitch,
+void drm_fb_xrgb8888_to_rgb565_dstclip(void __iomem *dst,
+ unsigned int dst_pitch,
void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip, bool swap)
{
@@ -272,15 +313,15 @@ void drm_fb_xrgb8888_to_rgb565_dstclip(void *dst, unsigned int dst_pitch,
size_t pixels = (clip->x2 - clip->x1);
size_t lines = (clip->y2 - clip->y1);

- convert_lines(dst + dst_offset, dst_pitch,
- vaddr + src_offset, fb->pitches[0],
- pixels, lines, conv);
+ convert_lines_toio(dst + dst_offset, dst_pitch,
+ vaddr + src_offset, fb->pitches[0],
+ pixels, lines, conv);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565_dstclip);

/**
* drm_fb_xrgb8888_to_rgb888_dstclip - Convert XRGB8888 to RGB888 clip buffer
- * @dst: RGB565 destination buffer
+ * @dst: RGB888 destination buffer (__iomem)
* @dst_pitch: destination buffer pitch
* @vaddr: XRGB8888 source buffer
* @fb: DRM framebuffer
@@ -291,9 +332,10 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565_dstclip);
* support XRGB8888.
*
* This function applies clipping on dst, i.e. the destination is a
- * full framebuffer but only the clip rect content is copied over.
+ * full framebuffer, in iomem, but only the clip rect content is copied over.
*/
-void drm_fb_xrgb8888_to_rgb888_dstclip(void *dst, unsigned int dst_pitch,
+void drm_fb_xrgb8888_to_rgb888_dstclip(void __iomem *dst,
+ unsigned int dst_pitch,
void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip)
{
@@ -305,9 +347,9 @@ void drm_fb_xrgb8888_to_rgb888_dstclip(void *dst, unsigned int dst_pitch,
size_t pixels = (clip->x2 - clip->x1);
size_t lines = (clip->y2 - clip->y1);

- convert_lines(dst + dst_offset, dst_pitch,
- vaddr + src_offset, fb->pitches[0],
- pixels, lines, conv);
+ convert_lines_toio(dst + dst_offset, dst_pitch,
+ vaddr + src_offset, fb->pitches[0],
+ pixels, lines, conv);
}
EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888_dstclip);

--
2.18.1
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