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authorFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2009-09-22 16:47:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 07:39:52 -0700
commitdb88e382a043bf288a6257dc5069f19c5ae67df6 (patch)
treee105449e8427b7d574512ccd034d7173a4a5d3ca /drivers/video/via
parentb008c64b5dfe37ac14928668da60132e9c8361ff (diff)
viafb: clean up virtual memory handling
Clean the handling of ioremapped video memory up. The following changes were made: info->screen_base - viafb_FB_MM (VRAM offset calculation) was replaced by info->fix.smem_start - viafbinfo->fix.smem_start which is essentially the same calculation but done with physical instead virtual addresses. *->fbmem_virt was replaced by viafbinfo->screen_base This is true for viafbinfo and viafbinfo1 as the par pointers are equal. An early initialization of viafbinfo1->fix.smem* was removed as done later in viafb_setup_fixinfo. This patch highlights that the only usage of the ioremapped video memory in the driver is for hardware cursor handling. Even if it has to hold the used virtual screen mapped for old-fashioned read/write calls (vs. mmap'ed) a lot virtual memory could be saved by only ioremapping on demand. Code cleanup, no runtime changes expected. Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Harald Welte <laforge@gnumonks.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/via')
-rw-r--r--drivers/video/via/global.c1
-rw-r--r--drivers/video/via/global.h1
-rw-r--r--drivers/video/via/viafbdev.c27
-rw-r--r--drivers/video/via/viafbdev.h1
4 files changed, 8 insertions, 22 deletions
diff --git a/drivers/video/via/global.c b/drivers/video/via/global.c
index 468be2425af..1096fd5de2b 100644
--- a/drivers/video/via/global.c
+++ b/drivers/video/via/global.c
@@ -46,7 +46,6 @@ int viafb_hotplug_refresh = 60;
unsigned int viafb_second_offset;
int viafb_second_size;
int viafb_primary_dev = None_Device;
-void __iomem *viafb_FB_MM;
unsigned int viafb_second_xres = 640;
unsigned int viafb_second_yres = 480;
unsigned int viafb_second_virtual_xres;
diff --git a/drivers/video/via/global.h b/drivers/video/via/global.h
index 7543d5f7e30..11382e5daf3 100644
--- a/drivers/video/via/global.h
+++ b/drivers/video/via/global.h
@@ -77,7 +77,6 @@ extern int viafb_hotplug_Yres;
extern int viafb_hotplug_bpp;
extern int viafb_hotplug_refresh;
extern int viafb_primary_dev;
-extern void __iomem *viafb_FB_MM;
extern struct fb_cursor viacursor;
extern unsigned int viafb_second_xres;
diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index 0cd112a3690..86835ee4102 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -832,8 +832,7 @@ static void viafb_fillrect(struct fb_info *info,
/* Source Base Address */
writel(0x0, viaparinfo->io_virt + VIA_REG_SRCBASE);
/* Destination Base Address */
- writel(((unsigned long) (info->screen_base) -
- (unsigned long) viafb_FB_MM) >> 3,
+ writel((info->fix.smem_start - viafbinfo->fix.smem_start) >> 3,
viaparinfo->io_virt + VIA_REG_DSTBASE);
/* Pitch */
pitch = (info->var.xres_virtual + 7) & ~7;
@@ -887,12 +886,10 @@ static void viafb_copyarea(struct fb_info *info,
}
/* Source Base Address */
- writel(((unsigned long) (info->screen_base) -
- (unsigned long) viafb_FB_MM) >> 3,
+ writel((info->fix.smem_start - viafbinfo->fix.smem_start) >> 3,
viaparinfo->io_virt + VIA_REG_SRCBASE);
/* Destination Base Address */
- writel(((unsigned long) (info->screen_base) -
- (unsigned long) viafb_FB_MM) >> 3,
+ writel((info->fix.smem_start - viafbinfo->fix.smem_start) >> 3,
viaparinfo->io_virt + VIA_REG_DSTBASE);
/* Pitch */
pitch = (info->var.xres_virtual + 7) & ~7;
@@ -951,8 +948,7 @@ static void viafb_imageblit(struct fb_info *info,
/* Source Base Address */
writel(0x0, viaparinfo->io_virt + VIA_REG_SRCBASE);
/* Destination Base Address */
- writel(((unsigned long) (info->screen_base) -
- (unsigned long) viafb_FB_MM) >> 3,
+ writel((info->fix.smem_start - viafbinfo->fix.smem_start) >> 3,
viaparinfo->io_virt + VIA_REG_DSTBASE);
/* Pitch */
pitch = (info->var.xres_virtual + 7) & ~7;
@@ -1170,7 +1166,7 @@ static int viafb_cursor(struct fb_info *info, struct fb_cursor *cursor)
}
}
- memcpy(((struct viafb_par *)(info->par))->fbmem_virt +
+ memcpy(viafbinfo->screen_base +
((struct viafb_par *)(info->par))->cursor_start,
cr_data->bak, CURSOR_SIZE);
out:
@@ -2073,11 +2069,9 @@ static int __devinit via_pci_probe(void)
viafb_get_fb_info(&viaparinfo->fbmem, &viaparinfo->memsize);
viaparinfo->fbmem_free = viaparinfo->memsize;
viaparinfo->fbmem_used = 0;
- viaparinfo->fbmem_virt = ioremap_nocache(viaparinfo->fbmem,
+ viafbinfo->screen_base = ioremap_nocache(viaparinfo->fbmem,
viaparinfo->memsize);
- viafbinfo->screen_base = (char *)viaparinfo->fbmem_virt;
-
- if (!viaparinfo->fbmem_virt) {
+ if (!viafbinfo->screen_base) {
printk(KERN_INFO "ioremap failed\n");
return -ENOMEM;
}
@@ -2110,7 +2104,6 @@ static int __devinit via_pci_probe(void)
viafb_second_size * 1024 * 1024;
}
- viafb_FB_MM = viaparinfo->fbmem_virt;
tmpm = viafb_mode;
tmpc = strsep(&tmpm, "x");
strict_strtoul(tmpc, 0, &default_xres);
@@ -2203,8 +2196,6 @@ static int __devinit via_pci_probe(void)
viaparinfo1->memsize = viaparinfo->memsize -
viafb_second_offset;
viaparinfo->memsize = viafb_second_offset;
- viaparinfo1->fbmem_virt = viaparinfo->fbmem_virt +
- viafb_second_offset;
viaparinfo1->fbmem = viaparinfo->fbmem + viafb_second_offset;
viaparinfo1->fbmem_used = viaparinfo->fbmem_used;
@@ -2226,8 +2217,6 @@ static int __devinit via_pci_probe(void)
memcpy(viafbinfo1, viafbinfo, sizeof(struct fb_info));
viafbinfo1->screen_base = viafbinfo->screen_base +
viafb_second_offset;
- viafbinfo1->fix.smem_start = viaparinfo1->fbmem;
- viafbinfo1->fix.smem_len = viaparinfo1->fbmem_free;
default_var.xres = viafb_second_xres;
default_var.yres = viafb_second_yres;
@@ -2289,7 +2278,7 @@ static void __devexit via_pci_remove(void)
unregister_framebuffer(viafbinfo);
if (viafb_dual_fb)
unregister_framebuffer(viafbinfo1);
- iounmap((void *)viaparinfo->fbmem_virt);
+ iounmap((void *)viafbinfo->screen_base);
iounmap(viaparinfo->io_virt);
viafb_delete_i2c_buss(viaparinfo);
diff --git a/drivers/video/via/viafbdev.h b/drivers/video/via/viafbdev.h
index 92318770107..e5a247c1bb9 100644
--- a/drivers/video/via/viafbdev.h
+++ b/drivers/video/via/viafbdev.h
@@ -38,7 +38,6 @@
#define VERSION_MINOR 4
struct viafb_par {
- void __iomem *fbmem_virt; /*framebuffer virtual memory address */
void __iomem *io_virt; /*iospace virtual memory address */
unsigned int fbmem; /*framebuffer physical memory address */
unsigned int memsize; /*size of fbmem */