| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 20 Mar 2015 16:18:05 -0700
From: "Luis R. Rodriguez" <mcgrof@...not-panic.com>
To: luto@...capital.net, mingo@...hat.com, tglx@...utronix.de,
hpa@...or.com, jgross@...e.com, JBeulich@...e.com, bp@...e.de,
suresh.b.siddha@...el.com, venkatesh.pallipadi@...el.com,
airlied@...hat.com
Cc: linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org,
x86@...nel.org, xen-devel@...ts.xenproject.org,
"Luis R. Rodriguez" <mcgrof@...e.com>,
Andy Walls <awalls@...metrocast.net>,
Ingo Molnar <mingo@...e.hu>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Antonino Daplas <adaplas@...il.com>,
Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
Tomi Valkeinen <tomi.valkeinen@...com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Arnd Bergmann <arnd@...db.de>,
"Michael S. Tsirkin" <mst@...hat.com>,
Stefan Bader <stefan.bader@...onical.com>,
konrad.wilk@...cle.com, ville.syrjala@...ux.intel.com,
david.vrabel@...rix.com, jbeulich@...e.com, toshi.kani@...com,
Roger Pau Monné <roger.pau@...rix.com>,
ivtv-devel@...vdriver.org, linux-media@...r.kernel.org,
xen-devel@...ts.xensource.com
Subject: [PATCH v1 15/47] [media] media: ivtv: use __arch_phys_wc_add()
From: "Luis R. Rodriguez" <mcgrof@...e.com>
Sadly this driver requires a bit of work in order
to use ioremap_wc() on the range currently used
for MTRR write-combining. We'd need to ensure two
ioremap() calls are done. Annotate this.
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Andy Walls <awalls@...metrocast.net>
Cc: Suresh Siddha <suresh.b.siddha@...el.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Juergen Gross <jgross@...e.com>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Dave Airlie <airlied@...hat.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Antonino Daplas <adaplas@...il.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Cc: Tomi Valkeinen <tomi.valkeinen@...com>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Michael S. Tsirkin <mst@...hat.com>
Cc: venkatesh.pallipadi@...el.com
Cc: Stefan Bader <stefan.bader@...onical.com>
Cc: konrad.wilk@...cle.com
Cc: ville.syrjala@...ux.intel.com
Cc: david.vrabel@...rix.com
Cc: jbeulich@...e.com
Cc: toshi.kani@...com
Cc: Roger Pau Monné <roger.pau@...rix.com>
Cc: linux-fbdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: ivtv-devel@...vdriver.org
Cc: linux-media@...r.kernel.org
Cc: xen-devel@...ts.xensource.com
Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com>
---
drivers/media/pci/ivtv/ivtvfb.c | 51 +++++++++++------------------------------
1 file changed, 14 insertions(+), 37 deletions(-)
diff --git a/drivers/media/pci/ivtv/ivtvfb.c b/drivers/media/pci/ivtv/ivtvfb.c
index 9ff1230..ceefa6f 100644
--- a/drivers/media/pci/ivtv/ivtvfb.c
+++ b/drivers/media/pci/ivtv/ivtvfb.c
@@ -44,10 +44,6 @@
#include <linux/ivtvfb.h>
#include <linux/slab.h>
-#ifdef CONFIG_MTRR
-#include <asm/mtrr.h>
-#endif
-
#include "ivtv-driver.h"
#include "ivtv-cards.h"
#include "ivtv-i2c.h"
@@ -155,12 +151,11 @@ struct osd_info {
/* Buffer size */
u32 video_buffer_size;
-#ifdef CONFIG_MTRR
/* video_base rounded down as required by hardware MTRRs */
unsigned long fb_start_aligned_physaddr;
/* video_base rounded up as required by hardware MTRRs */
unsigned long fb_end_aligned_physaddr;
-#endif
+ int wc_cookie;
/* Store the buffer offset */
int set_osd_coords_x;
@@ -1099,6 +1094,8 @@ static int ivtvfb_init_vidmode(struct ivtv *itv)
static int ivtvfb_init_io(struct ivtv *itv)
{
struct osd_info *oi = itv->osd_info;
+ /* Find the largest power of two that maps the whole buffer */
+ int size_shift = 31;
mutex_lock(&itv->serialize_lock);
if (ivtv_init_on_first_open(itv)) {
@@ -1132,29 +1129,16 @@ static int ivtvfb_init_io(struct ivtv *itv)
oi->video_pbase, oi->video_vbase,
oi->video_buffer_size / 1024);
-#ifdef CONFIG_MTRR
- {
- /* Find the largest power of two that maps the whole buffer */
- int size_shift = 31;
-
- while (!(oi->video_buffer_size & (1 << size_shift))) {
- size_shift--;
- }
- size_shift++;
- oi->fb_start_aligned_physaddr = oi->video_pbase & ~((1 << size_shift) - 1);
- oi->fb_end_aligned_physaddr = oi->video_pbase + oi->video_buffer_size;
- oi->fb_end_aligned_physaddr += (1 << size_shift) - 1;
- oi->fb_end_aligned_physaddr &= ~((1 << size_shift) - 1);
- if (mtrr_add(oi->fb_start_aligned_physaddr,
- oi->fb_end_aligned_physaddr - oi->fb_start_aligned_physaddr,
- MTRR_TYPE_WRCOMB, 1) < 0) {
- IVTVFB_INFO("disabled mttr\n");
- oi->fb_start_aligned_physaddr = 0;
- oi->fb_end_aligned_physaddr = 0;
- }
- }
-#endif
-
+ while (!(oi->video_buffer_size & (1 << size_shift)))
+ size_shift--;
+ size_shift++;
+ oi->fb_start_aligned_physaddr = oi->video_pbase & ~((1 << size_shift) - 1);
+ oi->fb_end_aligned_physaddr = oi->video_pbase + oi->video_buffer_size;
+ oi->fb_end_aligned_physaddr += (1 << size_shift) - 1;
+ oi->fb_end_aligned_physaddr &= ~((1 << size_shift) - 1);
+ oi->wc_cookie = __arch_phys_wc_add(oi->fb_start_aligned_physaddr,
+ oi->fb_end_aligned_physaddr -
+ oi->fb_start_aligned_physaddr);
/* Blank the entire osd. */
memset_io(oi->video_vbase, 0, oi->video_buffer_size);
@@ -1172,14 +1156,7 @@ static void ivtvfb_release_buffers (struct ivtv *itv)
/* Release pseudo palette */
kfree(oi->ivtvfb_info.pseudo_palette);
-
-#ifdef CONFIG_MTRR
- if (oi->fb_end_aligned_physaddr) {
- mtrr_del(-1, oi->fb_start_aligned_physaddr,
- oi->fb_end_aligned_physaddr - oi->fb_start_aligned_physaddr);
- }
-#endif
-
+ arch_phys_wc_del(oi->wc_cookie);
kfree(oi);
itv->osd_info = NULL;
}
--
2.3.2.209.gd67f9d5.dirty
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists