mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 01:11:14 +00:00
155 lines
4.5 KiB
Diff
155 lines
4.5 KiB
Diff
From 7c40eba1e6fd9ca8111c15eeadd9419522eb9a0b Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
Date: Fri, 25 Jan 2019 17:12:54 +0000
|
|
Subject: [PATCH 329/782] video: bcm2708_fb: Add compat_ioctl support.
|
|
|
|
When using a 64 bit kernel with 32 bit userspace we need
|
|
compat ioctl handling for FBIODMACOPY as one of the
|
|
parameters is a pointer.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
---
|
|
drivers/video/fbdev/bcm2708_fb.c | 87 ++++++++++++++++++++++++--------
|
|
1 file changed, 66 insertions(+), 21 deletions(-)
|
|
|
|
--- a/drivers/video/fbdev/bcm2708_fb.c
|
|
+++ b/drivers/video/fbdev/bcm2708_fb.c
|
|
@@ -482,9 +482,8 @@ static void dma_memcpy(struct bcm2708_fb
|
|
/* cache coherent but non-allocating in L1 and L2 */
|
|
#define INTALIAS_L1L2_NONALLOCATING(x) (((x)&~0xc0000000)|0x80000000)
|
|
|
|
-static long vc_mem_copy(struct bcm2708_fb *fb, unsigned long arg)
|
|
+static long vc_mem_copy(struct bcm2708_fb *fb, struct fb_dmacopy *ioparam)
|
|
{
|
|
- struct fb_dmacopy ioparam;
|
|
size_t size = PAGE_SIZE;
|
|
u32 *buf = NULL;
|
|
dma_addr_t bus_addr;
|
|
@@ -497,26 +496,16 @@ static long vc_mem_copy(struct bcm2708_f
|
|
goto out;
|
|
}
|
|
|
|
- /* Get the parameter data.
|
|
- */
|
|
- if (copy_from_user
|
|
- (&ioparam, (void *)arg, sizeof(ioparam)) != 0) {
|
|
- pr_err("[%s]: failed to copy-from-user\n",
|
|
- __func__);
|
|
- rc = -EFAULT;
|
|
- goto out;
|
|
- }
|
|
-
|
|
- if (fb->gpu.base == 0 || fb->gpu.length == 0) {
|
|
+ if (!fb->gpu.base || !fb->gpu.length) {
|
|
pr_err("[%s]: Unable to determine gpu memory (%x,%x)\n",
|
|
__func__, fb->gpu.base, fb->gpu.length);
|
|
return -EFAULT;
|
|
}
|
|
|
|
- if (INTALIAS_NORMAL(ioparam.src) < fb->gpu.base ||
|
|
- INTALIAS_NORMAL(ioparam.src) >= fb->gpu.base + fb->gpu.length) {
|
|
+ if (INTALIAS_NORMAL(ioparam->src) < fb->gpu.base ||
|
|
+ INTALIAS_NORMAL(ioparam->src) >= fb->gpu.base + fb->gpu.length) {
|
|
pr_err("[%s]: Invalid memory access %x (%x-%x)", __func__,
|
|
- INTALIAS_NORMAL(ioparam.src), fb->gpu.base,
|
|
+ INTALIAS_NORMAL(ioparam->src), fb->gpu.base,
|
|
fb->gpu.base + fb->gpu.length);
|
|
return -EFAULT;
|
|
}
|
|
@@ -530,11 +519,11 @@ static long vc_mem_copy(struct bcm2708_f
|
|
goto out;
|
|
}
|
|
|
|
- for (offset = 0; offset < ioparam.length; offset += size) {
|
|
- size_t remaining = ioparam.length - offset;
|
|
+ for (offset = 0; offset < ioparam->length; offset += size) {
|
|
+ size_t remaining = ioparam->length - offset;
|
|
size_t s = min(size, remaining);
|
|
- unsigned char *p = (unsigned char *)ioparam.src + offset;
|
|
- unsigned char *q = (unsigned char *)ioparam.dst + offset;
|
|
+ u8 *p = (u8 *)((uintptr_t)ioparam->src + offset);
|
|
+ u8 *q = (u8 *)ioparam->dst + offset;
|
|
|
|
dma_memcpy(fb, bus_addr,
|
|
INTALIAS_L1L2_NONALLOCATING((dma_addr_t)p), size);
|
|
@@ -566,8 +555,19 @@ static int bcm2708_ioctl(struct fb_info
|
|
&dummy, sizeof(dummy));
|
|
break;
|
|
case FBIODMACOPY:
|
|
- ret = vc_mem_copy(fb, arg);
|
|
+ {
|
|
+ struct fb_dmacopy ioparam;
|
|
+ /* Get the parameter data.
|
|
+ */
|
|
+ if (copy_from_user
|
|
+ (&ioparam, (void *)arg, sizeof(ioparam))) {
|
|
+ pr_err("[%s]: failed to copy-from-user\n", __func__);
|
|
+ ret = -EFAULT;
|
|
+ break;
|
|
+ }
|
|
+ ret = vc_mem_copy(fb, &ioparam);
|
|
break;
|
|
+ }
|
|
default:
|
|
dev_dbg(info->device, "Unknown ioctl 0x%x\n", cmd);
|
|
return -ENOTTY;
|
|
@@ -578,6 +578,48 @@ static int bcm2708_ioctl(struct fb_info
|
|
|
|
return ret;
|
|
}
|
|
+
|
|
+#ifdef CONFIG_COMPAT
|
|
+struct fb_dmacopy32 {
|
|
+ compat_uptr_t dst;
|
|
+ __u32 src;
|
|
+ __u32 length;
|
|
+};
|
|
+
|
|
+#define FBIODMACOPY32 _IOW('z', 0x22, struct fb_dmacopy32)
|
|
+
|
|
+static int bcm2708_compat_ioctl(struct fb_info *info, unsigned int cmd,
|
|
+ unsigned long arg)
|
|
+{
|
|
+ struct bcm2708_fb *fb = to_bcm2708(info);
|
|
+ int ret;
|
|
+
|
|
+ switch (cmd) {
|
|
+ case FBIODMACOPY32:
|
|
+ {
|
|
+ struct fb_dmacopy32 param32;
|
|
+ struct fb_dmacopy param;
|
|
+ /* Get the parameter data.
|
|
+ */
|
|
+ if (copy_from_user(¶m32, (void *)arg, sizeof(param32))) {
|
|
+ pr_err("[%s]: failed to copy-from-user\n", __func__);
|
|
+ ret = -EFAULT;
|
|
+ break;
|
|
+ }
|
|
+ param.dst = compat_ptr(param32.dst);
|
|
+ param.src = param32.src;
|
|
+ param.length = param32.length;
|
|
+ ret = vc_mem_copy(fb, ¶m);
|
|
+ break;
|
|
+ }
|
|
+ default:
|
|
+ ret = bcm2708_ioctl(info, cmd, arg);
|
|
+ break;
|
|
+ }
|
|
+ return ret;
|
|
+}
|
|
+#endif
|
|
+
|
|
static void bcm2708_fb_fillrect(struct fb_info *info,
|
|
const struct fb_fillrect *rect)
|
|
{
|
|
@@ -768,6 +810,9 @@ static struct fb_ops bcm2708_fb_ops = {
|
|
.fb_imageblit = bcm2708_fb_imageblit,
|
|
.fb_pan_display = bcm2708_fb_pan_display,
|
|
.fb_ioctl = bcm2708_ioctl,
|
|
+#ifdef CONFIG_COMPAT
|
|
+ .fb_compat_ioctl = bcm2708_compat_ioctl,
|
|
+#endif
|
|
};
|
|
|
|
static int bcm2708_fb_register(struct bcm2708_fb *fb)
|