diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0045-vc_mem-Add-vc_mem-driver-for-querying-firmware-memor.patch')
-rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0045-vc_mem-Add-vc_mem-driver-for-querying-firmware-memor.patch | 506 |
1 files changed, 0 insertions, 506 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0045-vc_mem-Add-vc_mem-driver-for-querying-firmware-memor.patch b/target/linux/bcm27xx/patches-5.4/950-0045-vc_mem-Add-vc_mem-driver-for-querying-firmware-memor.patch deleted file mode 100644 index f9f5547e9b..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0045-vc_mem-Add-vc_mem-driver-for-querying-firmware-memor.patch +++ /dev/null @@ -1,506 +0,0 @@ -From e6c9324a2112d016d2a89f0e3b98d564938971c8 Mon Sep 17 00:00:00 2001 -From: popcornmix <popcornmix@gmail.com> -Date: Fri, 28 Oct 2016 15:36:43 +0100 -Subject: [PATCH] vc_mem: Add vc_mem driver for querying firmware - memory addresses -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Signed-off-by: popcornmix <popcornmix@gmail.com> - -BCM270x: Move vc_mem - -Make the vc_mem module available for ARCH_BCM2835 by moving it. - -Signed-off-by: Noralf Trønnes <noralf@tronnes.org> - -char: vc_mem: Fix up compat ioctls for 64bit kernel - -compat_ioctl wasn't defined, so 32bit user/64bit kernel -always failed. -VC_MEM_IOC_MEM_PHYS_ADDR was defined with parameter size -unsigned long, so the ioctl cmd changes between sizes. - -Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> - -char: vc_mem: Fix all coding style issues. - -Cleans up all checkpatch errors in vc_mem.c and vc_mem.h -No functional change to the code. - -Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> ---- - drivers/char/broadcom/Kconfig | 18 ++ - drivers/char/broadcom/Makefile | 1 + - drivers/char/broadcom/vc_mem.c | 393 ++++++++++++++++++++++++++++++++ - include/linux/broadcom/vc_mem.h | 39 ++++ - 4 files changed, 451 insertions(+) - create mode 100644 drivers/char/broadcom/Kconfig - create mode 100644 drivers/char/broadcom/Makefile - create mode 100644 drivers/char/broadcom/vc_mem.c - create mode 100644 include/linux/broadcom/vc_mem.h - ---- /dev/null -+++ b/drivers/char/broadcom/Kconfig -@@ -0,0 +1,18 @@ -+# -+# Broadcom char driver config -+# -+ -+menuconfig BRCM_CHAR_DRIVERS -+ bool "Broadcom Char Drivers" -+ help -+ Broadcom's char drivers -+ -+if BRCM_CHAR_DRIVERS -+ -+config BCM2708_VCMEM -+ bool "Videocore Memory" -+ default y -+ help -+ Helper for videocore memory access and total size allocation. -+ -+endif ---- /dev/null -+++ b/drivers/char/broadcom/Makefile -@@ -0,0 +1 @@ -+obj-$(CONFIG_BCM2708_VCMEM) += vc_mem.o ---- /dev/null -+++ b/drivers/char/broadcom/vc_mem.c -@@ -0,0 +1,393 @@ -+/* -+ * Copyright 2010 - 2011 Broadcom Corporation. All rights reserved. -+ * -+ * Unless you and Broadcom execute a separate written software license -+ * agreement governing use of this software, this software is licensed to you -+ * under the terms of the GNU General Public License version 2, available at -+ * http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). -+ * -+ * Notwithstanding the above, under no circumstances may you combine this -+ * software in any way with any other Broadcom software provided under a -+ * license other than the GPL, without Broadcom's express prior written -+ * consent. -+ */ -+ -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/fs.h> -+#include <linux/device.h> -+#include <linux/cdev.h> -+#include <linux/mm.h> -+#include <linux/slab.h> -+#include <linux/debugfs.h> -+#include <linux/uaccess.h> -+#include <linux/dma-mapping.h> -+#include <linux/broadcom/vc_mem.h> -+ -+#define DRIVER_NAME "vc-mem" -+ -+/* Device (/dev) related variables */ -+static dev_t vc_mem_devnum; -+static struct class *vc_mem_class; -+static struct cdev vc_mem_cdev; -+static int vc_mem_inited; -+ -+#ifdef CONFIG_DEBUG_FS -+static struct dentry *vc_mem_debugfs_entry; -+#endif -+ -+/* -+ * Videocore memory addresses and size -+ * -+ * Drivers that wish to know the videocore memory addresses and sizes should -+ * use these variables instead of the MM_IO_BASE and MM_ADDR_IO defines in -+ * headers. This allows the other drivers to not be tied down to a a certain -+ * address/size at compile time. -+ * -+ * In the future, the goal is to have the videocore memory virtual address and -+ * size be calculated at boot time rather than at compile time. The decision of -+ * where the videocore memory resides and its size would be in the hands of the -+ * bootloader (and/or kernel). When that happens, the values of these variables -+ * would be calculated and assigned in the init function. -+ */ -+/* In the 2835 VC in mapped above ARM, but ARM has full access to VC space */ -+unsigned long mm_vc_mem_phys_addr; -+EXPORT_SYMBOL(mm_vc_mem_phys_addr); -+unsigned int mm_vc_mem_size; -+EXPORT_SYMBOL(mm_vc_mem_size); -+unsigned int mm_vc_mem_base; -+EXPORT_SYMBOL(mm_vc_mem_base); -+ -+static uint phys_addr; -+static uint mem_size; -+static uint mem_base; -+ -+static int -+vc_mem_open(struct inode *inode, struct file *file) -+{ -+ (void)inode; -+ -+ pr_debug("%s: called file = 0x%p\n", __func__, file); -+ -+ return 0; -+} -+ -+static int -+vc_mem_release(struct inode *inode, struct file *file) -+{ -+ (void)inode; -+ -+ pr_debug("%s: called file = 0x%p\n", __func__, file); -+ -+ return 0; -+} -+ -+static void -+vc_mem_get_size(void) -+{ -+} -+ -+static void -+vc_mem_get_base(void) -+{ -+} -+ -+int -+vc_mem_get_current_size(void) -+{ -+ return mm_vc_mem_size; -+} -+EXPORT_SYMBOL_GPL(vc_mem_get_current_size); -+ -+static long -+vc_mem_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -+{ -+ int rc = 0; -+ -+ (void) cmd; -+ (void) arg; -+ -+ pr_debug("%s: called file = 0x%p, cmd %08x\n", __func__, file, cmd); -+ -+ switch (cmd) { -+ case VC_MEM_IOC_MEM_PHYS_ADDR: -+ { -+ pr_debug("%s: VC_MEM_IOC_MEM_PHYS_ADDR=0x%p\n", -+ __func__, (void *)mm_vc_mem_phys_addr); -+ -+ if (copy_to_user((void *)arg, &mm_vc_mem_phys_addr, -+ sizeof(mm_vc_mem_phys_addr))) { -+ rc = -EFAULT; -+ } -+ break; -+ } -+ case VC_MEM_IOC_MEM_SIZE: -+ { -+ /* Get the videocore memory size first */ -+ vc_mem_get_size(); -+ -+ pr_debug("%s: VC_MEM_IOC_MEM_SIZE=%x\n", __func__, -+ mm_vc_mem_size); -+ -+ if (copy_to_user((void *)arg, &mm_vc_mem_size, -+ sizeof(mm_vc_mem_size))) { -+ rc = -EFAULT; -+ } -+ break; -+ } -+ case VC_MEM_IOC_MEM_BASE: -+ { -+ /* Get the videocore memory base */ -+ vc_mem_get_base(); -+ -+ pr_debug("%s: VC_MEM_IOC_MEM_BASE=%x\n", __func__, -+ mm_vc_mem_base); -+ -+ if (copy_to_user((void *)arg, &mm_vc_mem_base, -+ sizeof(mm_vc_mem_base))) { -+ rc = -EFAULT; -+ } -+ break; -+ } -+ case VC_MEM_IOC_MEM_LOAD: -+ { -+ /* Get the videocore memory base */ -+ vc_mem_get_base(); -+ -+ pr_debug("%s: VC_MEM_IOC_MEM_LOAD=%x\n", __func__, -+ mm_vc_mem_base); -+ -+ if (copy_to_user((void *)arg, &mm_vc_mem_base, -+ sizeof(mm_vc_mem_base))) { -+ rc = -EFAULT; -+ } -+ break; -+ } -+ default: -+ { -+ return -ENOTTY; -+ } -+ } -+ pr_debug("%s: file = 0x%p returning %d\n", __func__, file, rc); -+ -+ return rc; -+} -+ -+#ifdef CONFIG_COMPAT -+static long -+vc_mem_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -+{ -+ int rc = 0; -+ -+ switch (cmd) { -+ case VC_MEM_IOC_MEM_PHYS_ADDR32: -+ pr_debug("%s: VC_MEM_IOC_MEM_PHYS_ADDR32=0x%p\n", -+ __func__, (void *)mm_vc_mem_phys_addr); -+ -+ /* This isn't correct, but will cover us for now as -+ * VideoCore is 32bit only. -+ */ -+ if (copy_to_user((void *)arg, &mm_vc_mem_phys_addr, -+ sizeof(compat_ulong_t))) -+ rc = -EFAULT; -+ -+ break; -+ -+ default: -+ rc = vc_mem_ioctl(file, cmd, arg); -+ break; -+ } -+ -+ return rc; -+} -+#endif -+ -+static int -+vc_mem_mmap(struct file *filp, struct vm_area_struct *vma) -+{ -+ int rc = 0; -+ unsigned long length = vma->vm_end - vma->vm_start; -+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; -+ -+ pr_debug("%s: vm_start = 0x%08lx vm_end = 0x%08lx vm_pgoff = 0x%08lx\n", -+ __func__, (long)vma->vm_start, (long)vma->vm_end, -+ (long)vma->vm_pgoff); -+ -+ if (offset + length > mm_vc_mem_size) { -+ pr_err("%s: length %ld is too big\n", __func__, length); -+ return -EINVAL; -+ } -+ /* Do not cache the memory map */ -+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); -+ -+ rc = remap_pfn_range(vma, vma->vm_start, -+ (mm_vc_mem_phys_addr >> PAGE_SHIFT) + -+ vma->vm_pgoff, length, vma->vm_page_prot); -+ if (rc) -+ pr_err("%s: remap_pfn_range failed (rc=%d)\n", __func__, rc); -+ -+ return rc; -+} -+ -+/* File Operations for the driver. */ -+static const struct file_operations vc_mem_fops = { -+ .owner = THIS_MODULE, -+ .open = vc_mem_open, -+ .release = vc_mem_release, -+ .unlocked_ioctl = vc_mem_ioctl, -+#ifdef CONFIG_COMPAT -+ .compat_ioctl = vc_mem_compat_ioctl, -+#endif -+ .mmap = vc_mem_mmap, -+}; -+ -+#ifdef CONFIG_DEBUG_FS -+static void vc_mem_debugfs_deinit(void) -+{ -+ debugfs_remove_recursive(vc_mem_debugfs_entry); -+ vc_mem_debugfs_entry = NULL; -+} -+ -+ -+static int vc_mem_debugfs_init( -+ struct device *dev) -+{ -+ vc_mem_debugfs_entry = debugfs_create_dir(DRIVER_NAME, NULL); -+ if (!vc_mem_debugfs_entry) { -+ dev_warn(dev, "could not create debugfs entry\n"); -+ return -EFAULT; -+ } -+ -+ if (!debugfs_create_x32("vc_mem_phys_addr", -+ 0444, -+ vc_mem_debugfs_entry, -+ (u32 *)&mm_vc_mem_phys_addr)) { -+ dev_warn(dev, "%s:could not create vc_mem_phys entry\n", -+ __func__); -+ goto fail; -+ } -+ -+ if (!debugfs_create_x32("vc_mem_size", -+ 0444, -+ vc_mem_debugfs_entry, -+ (u32 *)&mm_vc_mem_size)) { -+ dev_warn(dev, "%s:could not create vc_mem_size entry\n", -+ __func__); -+ goto fail; -+ } -+ -+ if (!debugfs_create_x32("vc_mem_base", -+ 0444, -+ vc_mem_debugfs_entry, -+ (u32 *)&mm_vc_mem_base)) { -+ dev_warn(dev, "%s:could not create vc_mem_base entry\n", -+ __func__); -+ goto fail; -+ } -+ -+ return 0; -+ -+fail: -+ vc_mem_debugfs_deinit(); -+ return -EFAULT; -+} -+ -+#endif /* CONFIG_DEBUG_FS */ -+ -+/* Module load/unload functions */ -+ -+static int __init -+vc_mem_init(void) -+{ -+ int rc = -EFAULT; -+ struct device *dev; -+ -+ pr_debug("%s: called\n", __func__); -+ -+ mm_vc_mem_phys_addr = phys_addr; -+ mm_vc_mem_size = mem_size; -+ mm_vc_mem_base = mem_base; -+ -+ vc_mem_get_size(); -+ -+ pr_info("vc-mem: phys_addr:0x%08lx mem_base=0x%08x mem_size:0x%08x(%u MiB)\n", -+ mm_vc_mem_phys_addr, mm_vc_mem_base, mm_vc_mem_size, -+ mm_vc_mem_size / (1024 * 1024)); -+ -+ rc = alloc_chrdev_region(&vc_mem_devnum, 0, 1, DRIVER_NAME); -+ if (rc < 0) { -+ pr_err("%s: alloc_chrdev_region failed (rc=%d)\n", -+ __func__, rc); -+ goto out_err; -+ } -+ -+ cdev_init(&vc_mem_cdev, &vc_mem_fops); -+ rc = cdev_add(&vc_mem_cdev, vc_mem_devnum, 1); -+ if (rc) { -+ pr_err("%s: cdev_add failed (rc=%d)\n", __func__, rc); -+ goto out_unregister; -+ } -+ -+ vc_mem_class = class_create(THIS_MODULE, DRIVER_NAME); -+ if (IS_ERR(vc_mem_class)) { -+ rc = PTR_ERR(vc_mem_class); -+ pr_err("%s: class_create failed (rc=%d)\n", __func__, rc); -+ goto out_cdev_del; -+ } -+ -+ dev = device_create(vc_mem_class, NULL, vc_mem_devnum, NULL, -+ DRIVER_NAME); -+ if (IS_ERR(dev)) { -+ rc = PTR_ERR(dev); -+ pr_err("%s: device_create failed (rc=%d)\n", __func__, rc); -+ goto out_class_destroy; -+ } -+ -+#ifdef CONFIG_DEBUG_FS -+ /* don't fail if the debug entries cannot be created */ -+ vc_mem_debugfs_init(dev); -+#endif -+ -+ vc_mem_inited = 1; -+ return 0; -+ -+ device_destroy(vc_mem_class, vc_mem_devnum); -+ -+out_class_destroy: -+ class_destroy(vc_mem_class); -+ vc_mem_class = NULL; -+ -+out_cdev_del: -+ cdev_del(&vc_mem_cdev); -+ -+out_unregister: -+ unregister_chrdev_region(vc_mem_devnum, 1); -+ -+out_err: -+ return -1; -+} -+ -+static void __exit -+vc_mem_exit(void) -+{ -+ pr_debug("%s: called\n", __func__); -+ -+ if (vc_mem_inited) { -+#if CONFIG_DEBUG_FS -+ vc_mem_debugfs_deinit(); -+#endif -+ device_destroy(vc_mem_class, vc_mem_devnum); -+ class_destroy(vc_mem_class); -+ cdev_del(&vc_mem_cdev); -+ unregister_chrdev_region(vc_mem_devnum, 1); -+ } -+} -+ -+module_init(vc_mem_init); -+module_exit(vc_mem_exit); -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Broadcom Corporation"); -+ -+module_param(phys_addr, uint, 0644); -+module_param(mem_size, uint, 0644); -+module_param(mem_base, uint, 0644); ---- /dev/null -+++ b/include/linux/broadcom/vc_mem.h -@@ -0,0 +1,39 @@ -+/* -+ * Copyright 2010 - 2011 Broadcom Corporation. All rights reserved. -+ * -+ * Unless you and Broadcom execute a separate written software license -+ * agreement governing use of this software, this software is licensed to you -+ * under the terms of the GNU General Public License version 2, available at -+ * http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). -+ * -+ * Notwithstanding the above, under no circumstances may you combine this -+ * software in any way with any other Broadcom software provided under a -+ * license other than the GPL, without Broadcom's express prior written -+ * consent. -+ */ -+ -+#ifndef _VC_MEM_H -+#define _VC_MEM_H -+ -+#include <linux/ioctl.h> -+ -+#define VC_MEM_IOC_MAGIC 'v' -+ -+#define VC_MEM_IOC_MEM_PHYS_ADDR _IOR(VC_MEM_IOC_MAGIC, 0, unsigned long) -+#define VC_MEM_IOC_MEM_SIZE _IOR(VC_MEM_IOC_MAGIC, 1, unsigned int) -+#define VC_MEM_IOC_MEM_BASE _IOR(VC_MEM_IOC_MAGIC, 2, unsigned int) -+#define VC_MEM_IOC_MEM_LOAD _IOR(VC_MEM_IOC_MAGIC, 3, unsigned int) -+ -+#ifdef __KERNEL__ -+#define VC_MEM_TO_ARM_ADDR_MASK 0x3FFFFFFF -+ -+extern unsigned long mm_vc_mem_phys_addr; -+extern unsigned int mm_vc_mem_size; -+extern int vc_mem_get_current_size(void); -+#endif -+ -+#ifdef CONFIG_COMPAT -+#define VC_MEM_IOC_MEM_PHYS_ADDR32 _IOR(VC_MEM_IOC_MAGIC, 0, compat_ulong_t) -+#endif -+ -+#endif /* _VC_MEM_H */ |