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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0040-fbdev-add-FBIOCOPYAREA-ioctl.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0040-fbdev-add-FBIOCOPYAREA-ioctl.patch327
1 files changed, 0 insertions, 327 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0040-fbdev-add-FBIOCOPYAREA-ioctl.patch b/target/linux/bcm27xx/patches-5.4/950-0040-fbdev-add-FBIOCOPYAREA-ioctl.patch
deleted file mode 100644
index 23d6cd3139..0000000000
--- a/target/linux/bcm27xx/patches-5.4/950-0040-fbdev-add-FBIOCOPYAREA-ioctl.patch
+++ /dev/null
@@ -1,327 +0,0 @@
-From 764b96cc27c293fb37a8b9031ddb25290974e3a2 Mon Sep 17 00:00:00 2001
-From: Siarhei Siamashka <siarhei.siamashka@gmail.com>
-Date: Mon, 17 Jun 2013 13:32:11 +0300
-Subject: [PATCH] fbdev: add FBIOCOPYAREA ioctl
-
-Based on the patch authored by Ali Gholami Rudi at
- https://lkml.org/lkml/2009/7/13/153
-
-Provide an ioctl for userspace applications, but only if this operation
-is hardware accelerated (otherwide it does not make any sense).
-
-Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
-
-bcm2708_fb: Add ioctl for reading gpu memory through dma
-
-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 | 167 ++++++++++++++++++++++++++++++-
- drivers/video/fbdev/core/fbmem.c | 35 +++++++
- include/uapi/linux/fb.h | 12 +++
- 3 files changed, 213 insertions(+), 1 deletion(-)
-
---- a/drivers/video/fbdev/bcm2708_fb.c
-+++ b/drivers/video/fbdev/bcm2708_fb.c
-@@ -32,8 +32,10 @@
- #include <linux/printk.h>
- #include <linux/console.h>
- #include <linux/debugfs.h>
-+#include <linux/uaccess.h>
- #include <linux/io.h>
- #include <linux/dma-mapping.h>
-+#include <linux/cred.h>
- #include <soc/bcm2835/raspberrypi-firmware.h>
- #include <linux/mutex.h>
-
-@@ -613,7 +615,110 @@ static int bcm2708_fb_pan_display(struct
- return result;
- }
-
--static int bcm2708_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
-+static void dma_memcpy(struct bcm2708_fb *fb, dma_addr_t dst, dma_addr_t src,
-+ int size)
-+{
-+ struct bcm2708_fb_dev *fbdev = fb->fbdev;
-+ struct bcm2708_dma_cb *cb = fbdev->cb_base;
-+ int burst_size = (fbdev->dma_chan == 0) ? 8 : 2;
-+
-+ cb->info = BCM2708_DMA_BURST(burst_size) | BCM2708_DMA_S_WIDTH |
-+ BCM2708_DMA_S_INC | BCM2708_DMA_D_WIDTH |
-+ BCM2708_DMA_D_INC;
-+ cb->dst = dst;
-+ cb->src = src;
-+ cb->length = size;
-+ cb->stride = 0;
-+ cb->pad[0] = 0;
-+ cb->pad[1] = 0;
-+ cb->next = 0;
-+
-+ // Not sure what to do if this gets a signal whilst waiting
-+ if (mutex_lock_interruptible(&fbdev->dma_mutex))
-+ return;
-+
-+ if (size < dma_busy_wait_threshold) {
-+ bcm_dma_start(fbdev->dma_chan_base, fbdev->cb_handle);
-+ bcm_dma_wait_idle(fbdev->dma_chan_base);
-+ } else {
-+ void __iomem *local_dma_chan = fbdev->dma_chan_base;
-+
-+ cb->info |= BCM2708_DMA_INT_EN;
-+ bcm_dma_start(fbdev->dma_chan_base, fbdev->cb_handle);
-+ while (bcm_dma_is_busy(local_dma_chan)) {
-+ wait_event_interruptible(fbdev->dma_waitq,
-+ !bcm_dma_is_busy(local_dma_chan));
-+ }
-+ fbdev->dma_stats.dma_irqs++;
-+ }
-+ fbdev->dma_stats.dma_copies++;
-+
-+ mutex_unlock(&fbdev->dma_mutex);
-+}
-+
-+/* address with no aliases */
-+#define INTALIAS_NORMAL(x) ((x) & ~0xc0000000)
-+/* 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, struct fb_dmacopy *ioparam)
-+{
-+ size_t size = PAGE_SIZE;
-+ u32 *buf = NULL;
-+ dma_addr_t bus_addr;
-+ long rc = 0;
-+ size_t offset;
-+
-+ /* restrict this to root user */
-+ if (!uid_eq(current_euid(), GLOBAL_ROOT_UID)) {
-+ rc = -EFAULT;
-+ goto out;
-+ }
-+
-+ 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) {
-+ pr_err("[%s]: Invalid memory access %x (%x-%x)", __func__,
-+ INTALIAS_NORMAL(ioparam->src), fb->gpu.base,
-+ fb->gpu.base + fb->gpu.length);
-+ return -EFAULT;
-+ }
-+
-+ buf = dma_alloc_coherent(fb->fb.device, PAGE_ALIGN(size), &bus_addr,
-+ GFP_ATOMIC);
-+ if (!buf) {
-+ pr_err("[%s]: failed to dma_alloc_coherent(%zd)\n", __func__,
-+ size);
-+ rc = -ENOMEM;
-+ goto out;
-+ }
-+
-+ for (offset = 0; offset < ioparam->length; offset += size) {
-+ size_t remaining = ioparam->length - offset;
-+ size_t s = min(size, remaining);
-+ 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);
-+ if (copy_to_user(q, buf, s) != 0) {
-+ pr_err("[%s]: failed to copy-to-user\n", __func__);
-+ rc = -EFAULT;
-+ goto out;
-+ }
-+ }
-+out:
-+ if (buf)
-+ dma_free_coherent(fb->fb.device, PAGE_ALIGN(size), buf,
-+ bus_addr);
-+ return rc;
-+}
-+
- static int bcm2708_ioctl(struct fb_info *info, unsigned int cmd,
- unsigned long arg)
- {
-@@ -629,6 +734,21 @@ static int bcm2708_ioctl(struct fb_info
- RPI_FIRMWARE_FRAMEBUFFER_SET_VSYNC,
- &dummy, sizeof(dummy));
- break;
-+
-+ case FBIODMACOPY:
-+ {
-+ 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;
-@@ -639,6 +759,48 @@ 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(&param32, (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, &param);
-+ 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)
- {
-@@ -831,6 +993,9 @@ 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)
---- a/drivers/video/fbdev/core/fbmem.c
-+++ b/drivers/video/fbdev/core/fbmem.c
-@@ -1080,6 +1080,30 @@ fb_blank(struct fb_info *info, int blank
- }
- EXPORT_SYMBOL(fb_blank);
-
-+static int fb_copyarea_user(struct fb_info *info,
-+ struct fb_copyarea *copy)
-+{
-+ int ret = 0;
-+ lock_fb_info(info);
-+ if (copy->dx >= info->var.xres ||
-+ copy->sx >= info->var.xres ||
-+ copy->width > info->var.xres ||
-+ copy->dy >= info->var.yres ||
-+ copy->sy >= info->var.yres ||
-+ copy->height > info->var.yres ||
-+ copy->dx + copy->width > info->var.xres ||
-+ copy->sx + copy->width > info->var.xres ||
-+ copy->dy + copy->height > info->var.yres ||
-+ copy->sy + copy->height > info->var.yres) {
-+ ret = -EINVAL;
-+ goto out;
-+ }
-+ info->fbops->fb_copyarea(info, copy);
-+out:
-+ unlock_fb_info(info);
-+ return ret;
-+}
-+
- static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
- unsigned long arg)
- {
-@@ -1088,6 +1112,7 @@ static long do_fb_ioctl(struct fb_info *
- struct fb_fix_screeninfo fix;
- struct fb_cmap cmap_from;
- struct fb_cmap_user cmap;
-+ struct fb_copyarea copy;
- void __user *argp = (void __user *)arg;
- long ret = 0;
-
-@@ -1163,6 +1188,15 @@ static long do_fb_ioctl(struct fb_info *
- unlock_fb_info(info);
- console_unlock();
- break;
-+ case FBIOCOPYAREA:
-+ if (info->flags & FBINFO_HWACCEL_COPYAREA) {
-+ /* only provide this ioctl if it is accelerated */
-+ if (copy_from_user(&copy, argp, sizeof(copy)))
-+ return -EFAULT;
-+ ret = fb_copyarea_user(info, &copy);
-+ break;
-+ }
-+ /* fall through */
- default:
- lock_fb_info(info);
- fb = info->fbops;
-@@ -1308,6 +1342,7 @@ static long fb_compat_ioctl(struct file
- case FBIOPAN_DISPLAY:
- case FBIOGET_CON2FBMAP:
- case FBIOPUT_CON2FBMAP:
-+ case FBIOCOPYAREA:
- arg = (unsigned long) compat_ptr(arg);
- /* fall through */
- case FBIOBLANK:
---- a/include/uapi/linux/fb.h
-+++ b/include/uapi/linux/fb.h
-@@ -35,6 +35,12 @@
- #define FBIOPUT_MODEINFO 0x4617
- #define FBIOGET_DISPINFO 0x4618
- #define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32)
-+/*
-+ * HACK: use 'z' in order not to clash with any other ioctl numbers which might
-+ * be concurrently added to the mainline kernel
-+ */
-+#define FBIOCOPYAREA _IOW('z', 0x21, struct fb_copyarea)
-+#define FBIODMACOPY _IOW('z', 0x22, struct fb_dmacopy)
-
- #define FB_TYPE_PACKED_PIXELS 0 /* Packed Pixels */
- #define FB_TYPE_PLANES 1 /* Non interleaved planes */
-@@ -347,6 +353,12 @@ struct fb_copyarea {
- __u32 sy;
- };
-
-+struct fb_dmacopy {
-+ void *dst;
-+ __u32 src;
-+ __u32 length;
-+};
-+
- struct fb_fillrect {
- __u32 dx; /* screen-relative */
- __u32 dy;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-23 03:38:41 +0000