1 files changed, 0 insertions, 245 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0035-Implement-a-memory-driver-share-memory.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0035-Implement-a-memory-driver-share-memory.patch
deleted file mode 100644
index 741b44462..000000000
--- a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0035-Implement-a-memory-driver-share-memory.patch
+++ /dev/null
@@ -1,245 +0,0 @@
-From 9be0e8ccde0e096cc494aad6f15e7d7d3de3e46f Mon Sep 17 00:00:00 2001
-From: Cheng C Yang <cheng.c.yang@intel.com>
-Date: Fri, 9 Nov 2018 10:24:37 +0800
-Subject: [PATCH] Implement a memory driver share memory
-
-Implement a memory driver for BMC to access VGA share memory.
-The driver is used by MDRV2. In MDRV2 BIOS will send whole
-SMBIOS table to VGA memory and BMC can get the table from VGA
-memory through this driver.
-
-Signed-off-by: Cheng C Yang <cheng.c.yang@intel.com>
----
- .../bindings/soc/aspeed/aspeed-vga-sharedmem.txt   |  20 +++
- drivers/soc/aspeed/Kconfig                         |   9 ++
- drivers/soc/aspeed/Makefile                        |   1 +
- drivers/soc/aspeed/aspeed-vga-sharedmem.c          | 163 +++++++++++++++++++++
- 4 files changed, 193 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/soc/aspeed/aspeed-vga-sharedmem.txt
- create mode 100644 drivers/soc/aspeed/aspeed-vga-sharedmem.c
-
-diff --git a/Documentation/devicetree/bindings/soc/aspeed/aspeed-vga-sharedmem.txt b/Documentation/devicetree/bindings/soc/aspeed/aspeed-vga-sharedmem.txt
-new file mode 100644
-index 000000000000..03f57c53e844
---- /dev/null
-+++ b/Documentation/devicetree/bindings/soc/aspeed/aspeed-vga-sharedmem.txt
-@@ -0,0 +1,20 @@
-+* Aspeed VGA shared memory driver
-+
-+Aspeed VGA shared memory driver allow user to read data from AST2500
-+VGA memory. This driver is required by ManagedDataRegionlV2
-+specification. In the spec, BIOS will transfer whole SMBIOS table to
-+VGA memroy and BMC get the table from VGA memory. 0penBMC project do
-+not allow to use /dev/mem for security concerns. To get the data in
-+VGA shared memory in user space, implement this driver only allowed
-+user to mmap limited memory area.
-+
-+Required properties:
-+- compatible: "aspeed,ast2500-vga-sharedmem"
-+	- aspeed,ast2500-vga-sharedmem: Aspeed AST2500 family
-+- reg: Should contain VGA shared memory start address and length
-+
-+Example:
-+vga-shared-memory {
-+	compatible = "aspeed,ast2500-vga-sharedmem";
-+	reg = <0x9ff00000 0x100000>;
-+};
-diff --git a/drivers/soc/aspeed/Kconfig b/drivers/soc/aspeed/Kconfig
-index cb85917b8c6f..13cd9fbabbf1 100644
---- a/drivers/soc/aspeed/Kconfig
-+++ b/drivers/soc/aspeed/Kconfig
-@@ -59,4 +59,13 @@ config ASPEED_XDMA
- 	  SOCs. The XDMA engine can perform automatic PCI DMA operations
- 	  between the AST2XXX (acting as a BMC) and a host processor.
- 
-+config ASPEED_VGA_SHAREDMEM
-+	tristate "Aspeed VGA Shared memory"
-+	depends on SOC_ASPEED
-+	help
-+	  To access VGA shared memory on Aspeed BMC, enable this option.
-+	  This driver used by ManagedDataRegionlV2 specification. In the
-+	  specification, BIOS will transfer whole SMBIOS table to VGA memory,
-+	  and BMC can get the table from VGA memory through this driver.
-+
- endmenu
-diff --git a/drivers/soc/aspeed/Makefile b/drivers/soc/aspeed/Makefile
-index 56c5de5eeabe..875f0d9e7866 100644
---- a/drivers/soc/aspeed/Makefile
-+++ b/drivers/soc/aspeed/Makefile
-@@ -6,3 +6,4 @@ obj-$(CONFIG_ASPEED_LPC_SIO)	+= aspeed-lpc-sio.o
- obj-$(CONFIG_ASPEED_LPC_SNOOP)	+= aspeed-lpc-snoop.o
- obj-$(CONFIG_ASPEED_P2A_CTRL)	+= aspeed-p2a-ctrl.o
- obj-$(CONFIG_ASPEED_XDMA)	+= aspeed-xdma.o
-+obj-$(CONFIG_ASPEED_VGA_SHAREDMEM)	+= aspeed-vga-sharedmem.o
-diff --git a/drivers/soc/aspeed/aspeed-vga-sharedmem.c b/drivers/soc/aspeed/aspeed-vga-sharedmem.c
-new file mode 100644
-index 000000000000..cd1f5431378c
---- /dev/null
-+++ b/drivers/soc/aspeed/aspeed-vga-sharedmem.c
-@@ -0,0 +1,163 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * Copyright (c) 2018 Intel Corporation
-+ * VGA Shared Memory driver for Aspeed AST2500
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/miscdevice.h>
-+#include <linux/mm.h>
-+#include <linux/module.h>
-+#include <linux/of_platform.h>
-+
-+#define SHAREDMEM_NAME "vgasharedmem"
-+
-+struct aspeed_vga_sharedmem {
-+	struct miscdevice	miscdev;
-+	unsigned int	addr;
-+	unsigned int	size;
-+	bool	mmap_enable;
-+};
-+
-+static struct aspeed_vga_sharedmem *file_sharemem(struct file *file)
-+{
-+	return container_of(file->private_data,
-+			struct aspeed_vga_sharedmem, miscdev);
-+}
-+
-+static int vga_open(struct inode *inode, struct file *file)
-+{
-+	struct aspeed_vga_sharedmem *vga_sharedmem = file_sharemem(file);
-+
-+	if (!capable(CAP_SYS_ADMIN))
-+		return -EPERM;
-+
-+	if (!vga_sharedmem->mmap_enable)
-+		return -EPERM;
-+
-+	return 0;
-+}
-+
-+static int vga_mmap(struct file *file, struct vm_area_struct *vma)
-+{
-+	struct aspeed_vga_sharedmem *vga_sharedmem = file_sharemem(file);
-+
-+	if (!capable(CAP_SYS_ADMIN))
-+		return -EPERM;
-+
-+	vma->vm_flags = (vma->vm_flags & (~VM_WRITE));
-+	remap_pfn_range(vma, vma->vm_start, vga_sharedmem->addr >> PAGE_SHIFT,
-+			vga_sharedmem->size, vma->vm_page_prot);
-+	return 0;
-+}
-+
-+static ssize_t enable_mmap_show(struct device *dev,
-+				struct device_attribute *attr,
-+				char *buf)
-+{
-+	struct aspeed_vga_sharedmem *vga_sharedmem = dev_get_drvdata(dev);
-+
-+	return sprintf(buf, "%u\n", vga_sharedmem->mmap_enable);
-+}
-+
-+static ssize_t enable_mmap_store(struct device *dev,
-+				 struct device_attribute *attr,
-+				  const char *buf, size_t count)
-+{
-+	struct aspeed_vga_sharedmem *vga_sharedmem =
-+		dev_get_drvdata(dev);
-+	bool val;
-+
-+	if (kstrtobool(buf, &val))
-+		return -EINVAL;
-+
-+	vga_sharedmem->mmap_enable = val;
-+
-+	return count;
-+}
-+static DEVICE_ATTR_RW(enable_mmap);
-+
-+static struct attribute *sharedmem_attrs[] = {
-+	&dev_attr_enable_mmap.attr,
-+	NULL
-+};
-+
-+static const struct attribute_group sharedmem_attr_group = {
-+	.attrs = sharedmem_attrs,
-+};
-+
-+static const struct attribute_group *sharedmem_attr_groups[] = {
-+	&sharedmem_attr_group,
-+	NULL
-+};
-+
-+static const struct file_operations vga_sharedmem_fops = {
-+	.owner	= THIS_MODULE,
-+	.open	= vga_open,
-+	.mmap	= vga_mmap,
-+};
-+
-+static struct miscdevice vga_sharedmem_miscdev = {
-+	.minor = MISC_DYNAMIC_MINOR,
-+	.name = SHAREDMEM_NAME,
-+	.fops = &vga_sharedmem_fops,
-+	.groups = sharedmem_attr_groups,
-+};
-+
-+static int vga_sharedmem_probe(struct platform_device *pdev)
-+{
-+	struct aspeed_vga_sharedmem *vga_sharedmem;
-+	struct device *dev = &pdev->dev;
-+	struct resource *rc;
-+
-+	vga_sharedmem = devm_kzalloc(dev, sizeof(*vga_sharedmem), GFP_KERNEL);
-+	if (!vga_sharedmem)
-+		return -ENOMEM;
-+
-+	dev_set_drvdata(&pdev->dev, vga_sharedmem);
-+
-+	rc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+	if (!rc) {
-+		dev_err(dev, "Couldn't read size device-tree property\n");
-+		return -ENXIO;
-+	}
-+
-+	vga_sharedmem->addr = rc->start;
-+	vga_sharedmem->size = resource_size(rc);
-+	vga_sharedmem->mmap_enable = true;
-+
-+	vga_sharedmem->miscdev = vga_sharedmem_miscdev;
-+
-+	return misc_register(&vga_sharedmem->miscdev);
-+}
-+
-+static int vga_sharedmem_remove(struct platform_device *pdev)
-+{
-+	struct aspeed_vga_sharedmem *vga_sharedmem =
-+				dev_get_drvdata(&pdev->dev);
-+
-+	misc_deregister(&vga_sharedmem->miscdev);
-+
-+	return 0;
-+}
-+
-+static const struct of_device_id vga_sharedmem_match[] = {
-+	{ .compatible = "aspeed,ast2500-vga-sharedmem", },
-+	{ }
-+};
-+MODULE_DEVICE_TABLE(of, vga_sharedmem_match);
-+
-+static struct platform_driver vga_sharedmem_driver = {
-+	.driver = {
-+		.name	= "VGA-SHAREDMEM",
-+		.of_match_table = vga_sharedmem_match,
-+	},
-+	.probe = vga_sharedmem_probe,
-+	.remove = vga_sharedmem_remove,
-+};
-+
-+module_platform_driver(vga_sharedmem_driver);
-+
-+MODULE_AUTHOR("Yang Cheng <cheng.c.yang@intel.com>");
-+MODULE_DESCRIPTION("Shared VGA memory");
-+MODULE_LICENSE("GPL v2");
--- 
-2.7.4
-