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video: fbdev: matrox: use arch_phys_wc_add() and ioremap_wc()

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This driver uses the same ioremap()'d area for the MTRR.
Convert the driver from using the x86 specific MTRR code to
the architecture agnostic arch_phys_wc_add(). arch_phys_wc_add()
will avoid MTRR if write-combining is available, in order to
take advantage of that also ensure the ioremap'd area is requested
as write-combining.

There are a few motivations for this:

a) Take advantage of PAT when available

b) Help bury MTRR code away, MTRR is architecture specific and on
   x86 its replaced by PAT

c) Help with the goal of eventually using _PAGE_CACHE_UC over
   _PAGE_CACHE_UC_MINUS on x86 on ioremap_nocache() (see commit
   de33c442e titled "x86 PAT: fix performance drop for glx,
   use UC minus for ioremap(), ioremap_nocache() and
   pci_mmap_page_range()")

The conversion done is expressed by the following Coccinelle
SmPL patch, it additionally required manual intervention to
address all the #ifdery and removal of redundant things which
arch_phys_wc_add() already addresses such as verbose message
about when MTRR fails and doing nothing when we didn't get
an MTRR.

@ mtrr_found @
expression index, base, size;
@@

-index = mtrr_add(base, size, MTRR_TYPE_WRCOMB, 1);
+index = arch_phys_wc_add(base, size);

@ mtrr_rm depends on mtrr_found @
expression mtrr_found.index, mtrr_found.base, mtrr_found.size;
@@

-mtrr_del(index, base, size);
+arch_phys_wc_del(index);

@ mtrr_rm_zero_arg depends on mtrr_found @
expression mtrr_found.index;
@@

-mtrr_del(index, 0, 0);
+arch_phys_wc_del(index);

@ mtrr_rm_fb_info depends on mtrr_found @
struct fb_info *info;
expression mtrr_found.index;
@@

-mtrr_del(index, info->fix.smem_start, info->fix.smem_len);
+arch_phys_wc_del(index);

@ ioremap_replace_nocache depends on mtrr_found @
struct fb_info *info;
expression base, size;
@@

-info->screen_base = ioremap_nocache(base, size);
+info->screen_base = ioremap_wc(base, size);

@ ioremap_replace_default depends on mtrr_found @
struct fb_info *info;
expression base, size;
@@

-info->screen_base = ioremap(base, size);
+info->screen_base = ioremap_wc(base, size);

Generated-by: Coccinelle SmPL

Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Juergen Gross <jgross@suse.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Antonino Daplas <adaplas@gmail.com>
Cc: linux-fbdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Luis R. Rodriguez 2015-04-21 13:16:26 -07:00 committed by Tomi Valkeinen
parent 78084dcf29
commit 888ca5d26a
2 changed files with 14 additions and 49 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
drivers/video/fbdev/matrox/matroxfb_base.c
View file

@ -370,12 +370,9 @@ static void matroxfb_remove(struct matrox_fb_info *minfo, int dummy)
matroxfb_unregister_device(minfo);
unregister_framebuffer(&minfo->fbcon);
matroxfb_g450_shutdown(minfo);
#ifdef CONFIG_MTRR
if (minfo->mtrr.vram_valid)
mtrr_del(minfo->mtrr.vram, minfo->video.base, minfo->video.len);
#endif
mga_iounmap(minfo->mmio.vbase);
mga_iounmap(minfo->video.vbase);
arch_phys_wc_del(minfo->wc_cookie);
iounmap(minfo->mmio.vbase.vaddr);
iounmap(minfo->video.vbase.vaddr);
release_mem_region(minfo->video.base, minfo->video.len_maximum);
release_mem_region(minfo->mmio.base, 16384);
kfree(minfo);
@ -1252,9 +1249,7 @@ static int nobios; /* "matroxfb:nobios" */
static int noinit = 1; /* "matroxfb:init" */
static int inverse; /* "matroxfb:inverse" */
static int sgram; /* "matroxfb:sgram" */
#ifdef CONFIG_MTRR
static int mtrr = 1; /* "matroxfb:nomtrr" */
#endif
static int grayscale; /* "matroxfb:grayscale" */
static int dev = -1; /* "matroxfb:dev:xxxxx" */
static unsigned int vesa = ~0; /* "matroxfb:vesa:xxxxx" */
@ -1713,14 +1708,17 @@ static int initMatrox2(struct matrox_fb_info *minfo, struct board *b)
if (mem && (mem < memsize))
memsize = mem;
err = -ENOMEM;
if (mga_ioremap(ctrlptr_phys, 16384, MGA_IOREMAP_MMIO, &minfo->mmio.vbase)) {
minfo->mmio.vbase.vaddr = ioremap_nocache(ctrlptr_phys, 16384);
if (!minfo->mmio.vbase.vaddr) {
printk(KERN_ERR "matroxfb: cannot ioremap(%lX, 16384), matroxfb disabled\n", ctrlptr_phys);
goto failVideoMR;
}
minfo->mmio.base = ctrlptr_phys;
minfo->mmio.len = 16384;
minfo->video.base = video_base_phys;
if (mga_ioremap(video_base_phys, memsize, MGA_IOREMAP_FB, &minfo->video.vbase)) {
minfo->video.vbase.vaddr = ioremap_wc(video_base_phys, memsize);
if (!minfo->video.vbase.vaddr) {
printk(KERN_ERR "matroxfb: cannot ioremap(%lX, %d), matroxfb disabled\n",
video_base_phys, memsize);
goto failCtrlIO;
@ -1768,13 +1766,9 @@ static int initMatrox2(struct matrox_fb_info *minfo, struct board *b)
minfo->video.len_usable = minfo->video.len;
if (minfo->video.len_usable > b->base->maxdisplayable)
minfo->video.len_usable = b->base->maxdisplayable;
#ifdef CONFIG_MTRR
if (mtrr) {
minfo->mtrr.vram = mtrr_add(video_base_phys, minfo->video.len, MTRR_TYPE_WRCOMB, 1);
minfo->mtrr.vram_valid = 1;
printk(KERN_INFO "matroxfb: MTRR's turned on\n");
}
#endif /* CONFIG_MTRR */
if (mtrr)
minfo->wc_cookie = arch_phys_wc_add(video_base_phys,
minfo->video.len);
if (!minfo->devflags.novga)
request_region(0x3C0, 32, "matrox");
@ -1943,9 +1937,9 @@ static int initMatrox2(struct matrox_fb_info *minfo, struct board *b)
return 0;
failVideoIO:;
matroxfb_g450_shutdown(minfo);
mga_iounmap(minfo->video.vbase);
iounmap(minfo->video.vbase.vaddr);
failCtrlIO:;
mga_iounmap(minfo->mmio.vbase);
iounmap(minfo->mmio.vbase.vaddr);
failVideoMR:;
release_mem_region(video_base_phys, minfo->video.len_maximum);
failCtrlMR:;
@ -2439,10 +2433,8 @@ static int __init matroxfb_setup(char *options) {
nobios = !value;
else if (!strcmp(this_opt, "init"))
noinit = !value;
#ifdef CONFIG_MTRR
else if (!strcmp(this_opt, "mtrr"))
mtrr = value;
#endif
else if (!strcmp(this_opt, "inv24"))
inv24 = value;
else if (!strcmp(this_opt, "cross4MB"))
@ -2511,10 +2503,8 @@ module_param(noinit, int, 0);
MODULE_PARM_DESC(noinit, "Disables W/SG/SD-RAM and bus interface initialization (0 or 1=do not initialize) (default=0)");
module_param(memtype, int, 0);
MODULE_PARM_DESC(memtype, "Memory type for G200/G400 (see Documentation/fb/matroxfb.txt for explanation) (default=3 for G200, 0 for G400)");
#ifdef CONFIG_MTRR
module_param(mtrr, int, 0);
MODULE_PARM_DESC(mtrr, "This speeds up video memory accesses (0=disabled or 1) (default=1)");
#endif
module_param(sgram, int, 0);
MODULE_PARM_DESC(sgram, "Indicates that G100/G200/G400 has SGRAM memory (0=SDRAM, 1=SGRAM) (default=0)");
module_param(inv24, int, 0);

27
drivers/video/fbdev/matrox/matroxfb_base.h
View file

@ -44,9 +44,6 @@
#include <asm/io.h>
#include <asm/unaligned.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#if defined(CONFIG_PPC_PMAC)
#include <asm/prom.h>
@ -187,23 +184,6 @@ static inline void __iomem* vaddr_va(vaddr_t va) {
return va.vaddr;
}
#define MGA_IOREMAP_NORMAL 0
#define MGA_IOREMAP_NOCACHE 1
#define MGA_IOREMAP_FB MGA_IOREMAP_NOCACHE
#define MGA_IOREMAP_MMIO MGA_IOREMAP_NOCACHE
static inline int mga_ioremap(unsigned long phys, unsigned long size, int flags, vaddr_t* virt) {
if (flags & MGA_IOREMAP_NOCACHE)
virt->vaddr = ioremap_nocache(phys, size);
else
virt->vaddr = ioremap(phys, size);
return (virt->vaddr == NULL); /* 0, !0... 0, error_code in future */
}
static inline void mga_iounmap(vaddr_t va) {
iounmap(va.vaddr);
}
struct my_timming {
unsigned int pixclock;
int mnp;
@ -449,12 +429,7 @@ struct matrox_fb_info {
int plnwt;
int srcorg;
} capable;
#ifdef CONFIG_MTRR
struct {
int vram;
int vram_valid;
} mtrr;
#endif
int wc_cookie;
struct {
int precise_width;
int mga_24bpp_fix;