Merge tag 'fcoe1' into fixes

This patch fixes a critical bug that was introduced in 3.9
related to VLAN tagging FCoE frames.

1 files changed, 234 insertions, 0 deletions

diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c
new file mode 100644
index 000000000000..e2e9e3e61b72
--- /dev/null
+++ b/drivers/video/simplefb.c
@@ -0,0 +1,234 @@
+/*
+ * Simplest possible simple frame-buffer driver, as a platform device
+ *
+ * Copyright (c) 2013, Stephen Warren
+ *
+ * Based on q40fb.c, which was:
+ * Copyright (C) 2001 Richard Zidlicky <rz@linux-m68k.org>
+ *
+ * Also based on offb.c, which was:
+ * Copyright (C) 1997 Geert Uytterhoeven
+ * Copyright (C) 1996 Paul Mackerras
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+static struct fb_fix_screeninfo simplefb_fix = {
+	.id		= "simple",
+	.type		= FB_TYPE_PACKED_PIXELS,
+	.visual		= FB_VISUAL_TRUECOLOR,
+	.accel		= FB_ACCEL_NONE,
+};
+
+static struct fb_var_screeninfo simplefb_var = {
+	.height		= -1,
+	.width		= -1,
+	.activate	= FB_ACTIVATE_NOW,
+	.vmode		= FB_VMODE_NONINTERLACED,
+};
+
+static int simplefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+			      u_int transp, struct fb_info *info)
+{
+	u32 *pal = info->pseudo_palette;
+	u32 cr = red >> (16 - info->var.red.length);
+	u32 cg = green >> (16 - info->var.green.length);
+	u32 cb = blue >> (16 - info->var.blue.length);
+	u32 value;
+
+	if (regno >= 16)
+		return -EINVAL;
+
+	value = (cr << info->var.red.offset) |
+		(cg << info->var.green.offset) |
+		(cb << info->var.blue.offset);
+	if (info->var.transp.length > 0) {
+		u32 mask = (1 << info->var.transp.length) - 1;
+		mask <<= info->var.transp.offset;
+		value |= mask;
+	}
+	pal[regno] = value;
+
+	return 0;
+}
+
+static struct fb_ops simplefb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_setcolreg	= simplefb_setcolreg,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+};
+
+struct simplefb_format {
+	const char *name;
+	u32 bits_per_pixel;
+	struct fb_bitfield red;
+	struct fb_bitfield green;
+	struct fb_bitfield blue;
+	struct fb_bitfield transp;
+};
+
+static struct simplefb_format simplefb_formats[] = {
+	{ "r5g6b5", 16, {11, 5}, {5, 6}, {0, 5}, {0, 0} },
+};
+
+struct simplefb_params {
+	u32 width;
+	u32 height;
+	u32 stride;
+	struct simplefb_format *format;
+};
+
+static int simplefb_parse_dt(struct platform_device *pdev,
+			   struct simplefb_params *params)
+{
+	struct device_node *np = pdev->dev.of_node;
+	int ret;
+	const char *format;
+	int i;
+
+	ret = of_property_read_u32(np, "width", &params->width);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't parse width property\n");
+		return ret;
+	}
+
+	ret = of_property_read_u32(np, "height", &params->height);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't parse height property\n");
+		return ret;
+	}
+
+	ret = of_property_read_u32(np, "stride", &params->stride);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't parse stride property\n");
+		return ret;
+	}
+
+	ret = of_property_read_string(np, "format", &format);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't parse format property\n");
+		return ret;
+	}
+	params->format = NULL;
+	for (i = 0; i < ARRAY_SIZE(simplefb_formats); i++) {
+		if (strcmp(format, simplefb_formats[i].name))
+			continue;
+		params->format = &simplefb_formats[i];
+		break;
+	}
+	if (!params->format) {
+		dev_err(&pdev->dev, "Invalid format value\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int simplefb_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct simplefb_params params;
+	struct fb_info *info;
+	struct resource *mem;
+
+	if (fb_get_options("simplefb", NULL))
+		return -ENODEV;
+
+	ret = simplefb_parse_dt(pdev, &params);
+	if (ret)
+		return ret;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!mem) {
+		dev_err(&pdev->dev, "No memory resource\n");
+		return -EINVAL;
+	}
+
+	info = framebuffer_alloc(sizeof(u32) * 16, &pdev->dev);
+	if (!info)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, info);
+
+	info->fix = simplefb_fix;
+	info->fix.smem_start = mem->start;
+	info->fix.smem_len = resource_size(mem);
+	info->fix.line_length = params.stride;
+
+	info->var = simplefb_var;
+	info->var.xres = params.width;
+	info->var.yres = params.height;
+	info->var.xres_virtual = params.width;
+	info->var.yres_virtual = params.height;
+	info->var.bits_per_pixel = params.format->bits_per_pixel;
+	info->var.red = params.format->red;
+	info->var.green = params.format->green;
+	info->var.blue = params.format->blue;
+	info->var.transp = params.format->transp;
+
+	info->fbops = &simplefb_ops;
+	info->flags = FBINFO_DEFAULT;
+	info->screen_base = devm_ioremap(&pdev->dev, info->fix.smem_start,
+					 info->fix.smem_len);
+	if (!info->screen_base) {
+		framebuffer_release(info);
+		return -ENODEV;
+	}
+	info->pseudo_palette = (void *)(info + 1);
+
+	ret = register_framebuffer(info);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Unable to register simplefb: %d\n", ret);
+		framebuffer_release(info);
+		return ret;
+	}
+
+	dev_info(&pdev->dev, "fb%d: simplefb registered!\n", info->node);
+
+	return 0;
+}
+
+static int simplefb_remove(struct platform_device *pdev)
+{
+	struct fb_info *info = platform_get_drvdata(pdev);
+
+	unregister_framebuffer(info);
+	framebuffer_release(info);
+
+	return 0;
+}
+
+static const struct of_device_id simplefb_of_match[] = {
+	{ .compatible = "simple-framebuffer", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, simplefb_of_match);
+
+static struct platform_driver simplefb_driver = {
+	.driver = {
+		.name = "simple-framebuffer",
+		.owner = THIS_MODULE,
+		.of_match_table = simplefb_of_match,
+	},
+	.probe = simplefb_probe,
+	.remove = simplefb_remove,
+};
+module_platform_driver(simplefb_driver);
+
+MODULE_AUTHOR("Stephen Warren <swarren@wwwdotorg.org>");
+MODULE_DESCRIPTION("Simple framebuffer driver");
+MODULE_LICENSE("GPL v2");