From: Thomas Zimmermann <tzimmermann@suse.de>
To: mpe@ellerman.id.au, npiggin@gmail.com,
christophe.leroy@csgroup.eu, arnd@arndb.de, deller@gmx.de
Cc: linuxppc-dev@lists.ozlabs.org, linux-fbdev@vger.kernel.org,
linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
linux-mips@vger.kernel.org, sparclinux@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-arch@vger.kernel.org,
Thomas Zimmermann <tzimmermann@suse.de>
Subject: [PATCH v4 2/5] fbdev: Replace fb_pgprotect() with pgprot_framebuffer()
Date: Tue, 12 Sep 2023 15:49:00 +0200 [thread overview]
Message-ID: <20230912135050.17155-3-tzimmermann@suse.de> (raw)
In-Reply-To: <20230912135050.17155-1-tzimmermann@suse.de>
Rename the fbdev mmap helper fb_pgprotect() to pgprot_framebuffer().
The helper sets VMA page-access flags for framebuffers in device I/O
memory.
Also clean up the helper's parameters and return value. Instead of
the VMA instance, pass the individial parameters separately: existing
page-access flags, the VMAs start and end addresses and the offset
in the underlying device memory rsp file. Return the new page-access
flags. These changes align pgprot_framebuffer() with other pgprot_()
functions.
v4:
* fix commit message (Christophe)
v3:
* rename fb_pgprotect() to pgprot_framebuffer() (Arnd)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
arch/ia64/include/asm/fb.h | 15 +++++++--------
arch/m68k/include/asm/fb.h | 19 ++++++++++---------
arch/mips/include/asm/fb.h | 11 +++++------
arch/powerpc/include/asm/fb.h | 13 +++++--------
arch/sparc/include/asm/fb.h | 15 +++++++++------
arch/x86/include/asm/fb.h | 10 ++++++----
arch/x86/video/fbdev.c | 15 ++++++++-------
drivers/video/fbdev/core/fb_chrdev.c | 3 ++-
include/asm-generic/fb.h | 12 ++++++------
9 files changed, 58 insertions(+), 55 deletions(-)
diff --git a/arch/ia64/include/asm/fb.h b/arch/ia64/include/asm/fb.h
index 1717b26fd423f..7fce0d5423590 100644
--- a/arch/ia64/include/asm/fb.h
+++ b/arch/ia64/include/asm/fb.h
@@ -8,17 +8,16 @@
#include <asm/page.h>
-struct file;
-
-static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
- unsigned long off)
+static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
+ unsigned long vm_start, unsigned long vm_end,
+ unsigned long offset)
{
- if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+ if (efi_range_is_wc(vm_start, vm_end - vm_start))
+ return pgprot_writecombine(prot);
else
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ return pgprot_noncached(prot);
}
-#define fb_pgprotect fb_pgprotect
+#define pgprot_framebuffer pgprot_framebuffer
static inline void fb_memcpy_fromio(void *to, const volatile void __iomem *from, size_t n)
{
diff --git a/arch/m68k/include/asm/fb.h b/arch/m68k/include/asm/fb.h
index 24273fc7ad917..9941b7434b696 100644
--- a/arch/m68k/include/asm/fb.h
+++ b/arch/m68k/include/asm/fb.h
@@ -5,26 +5,27 @@
#include <asm/page.h>
#include <asm/setup.h>
-struct file;
-
-static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
- unsigned long off)
+static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
+ unsigned long vm_start, unsigned long vm_end,
+ unsigned long offset)
{
#ifdef CONFIG_MMU
#ifdef CONFIG_SUN3
- pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
+ pgprot_val(prot) |= SUN3_PAGE_NOCACHE;
#else
if (CPU_IS_020_OR_030)
- pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
+ pgprot_val(prot) |= _PAGE_NOCACHE030;
if (CPU_IS_040_OR_060) {
- pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
+ pgprot_val(prot) &= _CACHEMASK040;
/* Use no-cache mode, serialized */
- pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
+ pgprot_val(prot) |= _PAGE_NOCACHE_S;
}
#endif /* CONFIG_SUN3 */
#endif /* CONFIG_MMU */
+
+ return prot;
}
-#define fb_pgprotect fb_pgprotect
+#define pgprot_framebuffer pgprot_framebuffer
#include <asm-generic/fb.h>
diff --git a/arch/mips/include/asm/fb.h b/arch/mips/include/asm/fb.h
index 18b7226403bad..d98d6681d64ec 100644
--- a/arch/mips/include/asm/fb.h
+++ b/arch/mips/include/asm/fb.h
@@ -3,14 +3,13 @@
#include <asm/page.h>
-struct file;
-
-static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
- unsigned long off)
+static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
+ unsigned long vm_start, unsigned long vm_end,
+ unsigned long offset)
{
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ return pgprot_noncached(prot);
}
-#define fb_pgprotect fb_pgprotect
+#define pgprot_framebuffer pgprot_framebuffer
/*
* MIPS doesn't define __raw_ I/O macros, so the helpers
diff --git a/arch/powerpc/include/asm/fb.h b/arch/powerpc/include/asm/fb.h
index 61e3b8806db69..3cecf14d51de8 100644
--- a/arch/powerpc/include/asm/fb.h
+++ b/arch/powerpc/include/asm/fb.h
@@ -2,23 +2,20 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
-#include <linux/fs.h>
-
#include <asm/page.h>
-static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
- unsigned long off)
+static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
+ unsigned long vm_start, unsigned long vm_end,
+ unsigned long offset)
{
/*
* PowerPC's implementation of phys_mem_access_prot() does
* not use the file argument. Set it to NULL in preparation
* of later updates to the interface.
*/
- vma->vm_page_prot = phys_mem_access_prot(NULL, PHYS_PFN(off),
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot);
+ return phys_mem_access_prot(NULL, PHYS_PFN(offset), vm_end - vm_start, prot);
}
-#define fb_pgprotect fb_pgprotect
+#define pgprot_framebuffer pgprot_framebuffer
#include <asm-generic/fb.h>
diff --git a/arch/sparc/include/asm/fb.h b/arch/sparc/include/asm/fb.h
index 572ecd3e1cc48..24440c0fda490 100644
--- a/arch/sparc/include/asm/fb.h
+++ b/arch/sparc/include/asm/fb.h
@@ -4,15 +4,18 @@
#include <linux/io.h>
+#include <asm/page.h>
+
struct fb_info;
-struct file;
-struct vm_area_struct;
#ifdef CONFIG_SPARC32
-static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
- unsigned long off)
-{ }
-#define fb_pgprotect fb_pgprotect
+static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
+ unsigned long vm_start, unsigned long vm_end,
+ unsigned long offset)
+{
+ return prot;
+}
+#define pgprot_framebuffer pgprot_framebuffer
#endif
int fb_is_primary_device(struct fb_info *info);
diff --git a/arch/x86/include/asm/fb.h b/arch/x86/include/asm/fb.h
index 23873da8fb77c..c3b9582de7efd 100644
--- a/arch/x86/include/asm/fb.h
+++ b/arch/x86/include/asm/fb.h
@@ -2,12 +2,14 @@
#ifndef _ASM_X86_FB_H
#define _ASM_X86_FB_H
+#include <asm/page.h>
+
struct fb_info;
-struct file;
-struct vm_area_struct;
-void fb_pgprotect(struct file *file, struct vm_area_struct *vma, unsigned long off);
-#define fb_pgprotect fb_pgprotect
+pgprot_t pgprot_framebuffer(pgprot_t prot,
+ unsigned long vm_start, unsigned long vm_end,
+ unsigned long offset);
+#define pgprot_framebuffer pgprot_framebuffer
int fb_is_primary_device(struct fb_info *info);
#define fb_is_primary_device fb_is_primary_device
diff --git a/arch/x86/video/fbdev.c b/arch/x86/video/fbdev.c
index 49a0452402e97..1dd6528cc947c 100644
--- a/arch/x86/video/fbdev.c
+++ b/arch/x86/video/fbdev.c
@@ -13,16 +13,17 @@
#include <linux/vgaarb.h>
#include <asm/fb.h>
-void fb_pgprotect(struct file *file, struct vm_area_struct *vma, unsigned long off)
+pgprot_t pgprot_framebuffer(pgprot_t prot,
+ unsigned long vm_start, unsigned long vm_end,
+ unsigned long offset)
{
- unsigned long prot;
-
- prot = pgprot_val(vma->vm_page_prot) & ~_PAGE_CACHE_MASK;
+ pgprot_val(prot) &= ~_PAGE_CACHE_MASK;
if (boot_cpu_data.x86 > 3)
- pgprot_val(vma->vm_page_prot) =
- prot | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS);
+ pgprot_val(prot) |= cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS);
+
+ return prot;
}
-EXPORT_SYMBOL(fb_pgprotect);
+EXPORT_SYMBOL(pgprot_framebuffer);
int fb_is_primary_device(struct fb_info *info)
{
diff --git a/drivers/video/fbdev/core/fb_chrdev.c b/drivers/video/fbdev/core/fb_chrdev.c
index eadb81f53a821..32a7315b4b6dd 100644
--- a/drivers/video/fbdev/core/fb_chrdev.c
+++ b/drivers/video/fbdev/core/fb_chrdev.c
@@ -365,7 +365,8 @@ static int fb_mmap(struct file *file, struct vm_area_struct *vma)
mutex_unlock(&info->mm_lock);
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
- fb_pgprotect(file, vma, start);
+ vma->vm_page_prot = pgprot_framebuffer(vma->vm_page_prot, vma->vm_start,
+ vma->vm_end, start);
return vm_iomap_memory(vma, start, len);
}
diff --git a/include/asm-generic/fb.h b/include/asm-generic/fb.h
index bb7ee9c70e603..6ccabb400aa66 100644
--- a/include/asm-generic/fb.h
+++ b/include/asm-generic/fb.h
@@ -12,14 +12,14 @@
#include <linux/pgtable.h>
struct fb_info;
-struct file;
-#ifndef fb_pgprotect
-#define fb_pgprotect fb_pgprotect
-static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
- unsigned long off)
+#ifndef pgprot_framebuffer
+#define pgprot_framebuffer pgprot_framebuffer
+static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
+ unsigned long vm_start, unsigned long vm_end,
+ unsigned long offset)
{
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+ return pgprot_writecombine(prot);
}
#endif
--
2.42.0
next prev parent reply other threads:[~2023-09-12 13:50 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-12 13:48 [PATCH v4 0/5] ppc, fbdev: Clean up fbdev mmap helper Thomas Zimmermann
2023-09-12 13:48 ` [PATCH v4 1/5] fbdev: Avoid file argument in fb_pgprotect() Thomas Zimmermann
2023-09-20 8:01 ` Javier Martinez Canillas
2023-09-22 7:40 ` Thomas Zimmermann
2023-09-12 13:49 ` Thomas Zimmermann [this message]
2023-09-13 8:09 ` [PATCH v4 2/5] fbdev: Replace fb_pgprotect() with pgprot_framebuffer() Geert Uytterhoeven
2023-09-20 8:09 ` Javier Martinez Canillas
2023-09-12 13:49 ` [PATCH v4 3/5] arch/powerpc: Remove trailing whitespaces Thomas Zimmermann
2023-09-13 6:34 ` Philippe Mathieu-Daudé
2023-09-12 13:49 ` [PATCH v4 4/5] arch/powerpc: Remove file parameter from phys_mem_access_prot code Thomas Zimmermann
2023-09-12 13:49 ` [PATCH v4 5/5] arch/powerpc: Call internal __phys_mem_access_prot() in fbdev code Thomas Zimmermann
2023-09-18 7:32 ` [PATCH v4 0/5] ppc, fbdev: Clean up fbdev mmap helper Thomas Zimmermann
2023-09-20 15:06 ` Arnd Bergmann
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