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-rw-r--r--arch/arm/plat-omap/iommu-debug.c418
1 files changed, 0 insertions, 418 deletions
diff --git a/arch/arm/plat-omap/iommu-debug.c b/arch/arm/plat-omap/iommu-debug.c
deleted file mode 100644
index f07cf2f..0000000
--- a/arch/arm/plat-omap/iommu-debug.c
+++ /dev/null
@@ -1,418 +0,0 @@
-/*
- * omap iommu: debugfs interface
- *
- * Copyright (C) 2008-2009 Nokia Corporation
- *
- * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/platform_device.h>
-#include <linux/debugfs.h>
-
-#include <plat/iommu.h>
-#include <plat/iovmm.h>
-
-#include "iopgtable.h"
-
-#define MAXCOLUMN 100 /* for short messages */
-
-static DEFINE_MUTEX(iommu_debug_lock);
-
-static struct dentry *iommu_debug_root;
-
-static ssize_t debug_read_ver(struct file *file, char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- u32 ver = iommu_arch_version();
- char buf[MAXCOLUMN], *p = buf;
-
- p += sprintf(p, "H/W version: %d.%d\n", (ver >> 4) & 0xf , ver & 0xf);
-
- return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-}
-
-static ssize_t debug_read_regs(struct file *file, char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct iommu *obj = file->private_data;
- char *p, *buf;
- ssize_t bytes;
-
- buf = kmalloc(count, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- p = buf;
-
- mutex_lock(&iommu_debug_lock);
-
- bytes = iommu_dump_ctx(obj, p, count);
- bytes = simple_read_from_buffer(userbuf, count, ppos, buf, bytes);
-
- mutex_unlock(&iommu_debug_lock);
- kfree(buf);
-
- return bytes;
-}
-
-static ssize_t debug_read_tlb(struct file *file, char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct iommu *obj = file->private_data;
- char *p, *buf;
- ssize_t bytes, rest;
-
- buf = kmalloc(count, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- p = buf;
-
- mutex_lock(&iommu_debug_lock);
-
- p += sprintf(p, "%8s %8s\n", "cam:", "ram:");
- p += sprintf(p, "-----------------------------------------\n");
- rest = count - (p - buf);
- p += dump_tlb_entries(obj, p, rest);
-
- bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-
- mutex_unlock(&iommu_debug_lock);
- kfree(buf);
-
- return bytes;
-}
-
-static ssize_t debug_write_pagetable(struct file *file,
- const char __user *userbuf, size_t count, loff_t *ppos)
-{
- struct iotlb_entry e;
- struct cr_regs cr;
- int err;
- struct iommu *obj = file->private_data;
- char buf[MAXCOLUMN], *p = buf;
-
- count = min(count, sizeof(buf));
-
- mutex_lock(&iommu_debug_lock);
- if (copy_from_user(p, userbuf, count)) {
- mutex_unlock(&iommu_debug_lock);
- return -EFAULT;
- }
-
- sscanf(p, "%x %x", &cr.cam, &cr.ram);
- if (!cr.cam || !cr.ram) {
- mutex_unlock(&iommu_debug_lock);
- return -EINVAL;
- }
-
- iotlb_cr_to_e(&cr, &e);
- err = iopgtable_store_entry(obj, &e);
- if (err)
- dev_err(obj->dev, "%s: fail to store cr\n", __func__);
-
- mutex_unlock(&iommu_debug_lock);
- return count;
-}
-
-#define dump_ioptable_entry_one(lv, da, val) \
- ({ \
- int __err = 0; \
- ssize_t bytes; \
- const int maxcol = 22; \
- const char *str = "%d: %08x %08x\n"; \
- bytes = snprintf(p, maxcol, str, lv, da, val); \
- p += bytes; \
- len -= bytes; \
- if (len < maxcol) \
- __err = -ENOMEM; \
- __err; \
- })
-
-static ssize_t dump_ioptable(struct iommu *obj, char *buf, ssize_t len)
-{
- int i;
- u32 *iopgd;
- char *p = buf;
-
- spin_lock(&obj->page_table_lock);
-
- iopgd = iopgd_offset(obj, 0);
- for (i = 0; i < PTRS_PER_IOPGD; i++, iopgd++) {
- int j, err;
- u32 *iopte;
- u32 da;
-
- if (!*iopgd)
- continue;
-
- if (!(*iopgd & IOPGD_TABLE)) {
- da = i << IOPGD_SHIFT;
-
- err = dump_ioptable_entry_one(1, da, *iopgd);
- if (err)
- goto out;
- continue;
- }
-
- iopte = iopte_offset(iopgd, 0);
-
- for (j = 0; j < PTRS_PER_IOPTE; j++, iopte++) {
- if (!*iopte)
- continue;
-
- da = (i << IOPGD_SHIFT) + (j << IOPTE_SHIFT);
- err = dump_ioptable_entry_one(2, da, *iopgd);
- if (err)
- goto out;
- }
- }
-out:
- spin_unlock(&obj->page_table_lock);
-
- return p - buf;
-}
-
-static ssize_t debug_read_pagetable(struct file *file, char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct iommu *obj = file->private_data;
- char *p, *buf;
- size_t bytes;
-
- buf = (char *)__get_free_page(GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- p = buf;
-
- p += sprintf(p, "L: %8s %8s\n", "da:", "pa:");
- p += sprintf(p, "-----------------------------------------\n");
-
- mutex_lock(&iommu_debug_lock);
-
- bytes = PAGE_SIZE - (p - buf);
- p += dump_ioptable(obj, p, bytes);
-
- bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-
- mutex_unlock(&iommu_debug_lock);
- free_page((unsigned long)buf);
-
- return bytes;
-}
-
-static ssize_t debug_read_mmap(struct file *file, char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct iommu *obj = file->private_data;
- char *p, *buf;
- struct iovm_struct *tmp;
- int uninitialized_var(i);
- ssize_t bytes;
-
- buf = (char *)__get_free_page(GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- p = buf;
-
- p += sprintf(p, "%-3s %-8s %-8s %6s %8s\n",
- "No", "start", "end", "size", "flags");
- p += sprintf(p, "-------------------------------------------------\n");
-
- mutex_lock(&iommu_debug_lock);
-
- list_for_each_entry(tmp, &obj->mmap, list) {
- size_t len;
- const char *str = "%3d %08x-%08x %6x %8x\n";
- const int maxcol = 39;
-
- len = tmp->da_end - tmp->da_start;
- p += snprintf(p, maxcol, str,
- i, tmp->da_start, tmp->da_end, len, tmp->flags);
-
- if (PAGE_SIZE - (p - buf) < maxcol)
- break;
- i++;
- }
-
- bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-
- mutex_unlock(&iommu_debug_lock);
- free_page((unsigned long)buf);
-
- return bytes;
-}
-
-static ssize_t debug_read_mem(struct file *file, char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct iommu *obj = file->private_data;
- char *p, *buf;
- struct iovm_struct *area;
- ssize_t bytes;
-
- count = min_t(ssize_t, count, PAGE_SIZE);
-
- buf = (char *)__get_free_page(GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- p = buf;
-
- mutex_lock(&iommu_debug_lock);
-
- area = find_iovm_area(obj, (u32)ppos);
- if (IS_ERR(area)) {
- bytes = -EINVAL;
- goto err_out;
- }
- memcpy(p, area->va, count);
- p += count;
-
- bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
-err_out:
- mutex_unlock(&iommu_debug_lock);
- free_page((unsigned long)buf);
-
- return bytes;
-}
-
-static ssize_t debug_write_mem(struct file *file, const char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct iommu *obj = file->private_data;
- struct iovm_struct *area;
- char *p, *buf;
-
- count = min_t(size_t, count, PAGE_SIZE);
-
- buf = (char *)__get_free_page(GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- p = buf;
-
- mutex_lock(&iommu_debug_lock);
-
- if (copy_from_user(p, userbuf, count)) {
- count = -EFAULT;
- goto err_out;
- }
-
- area = find_iovm_area(obj, (u32)ppos);
- if (IS_ERR(area)) {
- count = -EINVAL;
- goto err_out;
- }
- memcpy(area->va, p, count);
-err_out:
- mutex_unlock(&iommu_debug_lock);
- free_page((unsigned long)buf);
-
- return count;
-}
-
-static int debug_open_generic(struct inode *inode, struct file *file)
-{
- file->private_data = inode->i_private;
- return 0;
-}
-
-#define DEBUG_FOPS(name) \
- static const struct file_operations debug_##name##_fops = { \
- .open = debug_open_generic, \
- .read = debug_read_##name, \
- .write = debug_write_##name, \
- .llseek = generic_file_llseek, \
- };
-
-#define DEBUG_FOPS_RO(name) \
- static const struct file_operations debug_##name##_fops = { \
- .open = debug_open_generic, \
- .read = debug_read_##name, \
- .llseek = generic_file_llseek, \
- };
-
-DEBUG_FOPS_RO(ver);
-DEBUG_FOPS_RO(regs);
-DEBUG_FOPS_RO(tlb);
-DEBUG_FOPS(pagetable);
-DEBUG_FOPS_RO(mmap);
-DEBUG_FOPS(mem);
-
-#define __DEBUG_ADD_FILE(attr, mode) \
- { \
- struct dentry *dent; \
- dent = debugfs_create_file(#attr, mode, parent, \
- obj, &debug_##attr##_fops); \
- if (!dent) \
- return -ENOMEM; \
- }
-
-#define DEBUG_ADD_FILE(name) __DEBUG_ADD_FILE(name, 600)
-#define DEBUG_ADD_FILE_RO(name) __DEBUG_ADD_FILE(name, 400)
-
-static int iommu_debug_register(struct device *dev, void *data)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct iommu *obj = platform_get_drvdata(pdev);
- struct dentry *d, *parent;
-
- if (!obj || !obj->dev)
- return -EINVAL;
-
- d = debugfs_create_dir(obj->name, iommu_debug_root);
- if (!d)
- return -ENOMEM;
- parent = d;
-
- d = debugfs_create_u8("nr_tlb_entries", 400, parent,
- (u8 *)&obj->nr_tlb_entries);
- if (!d)
- return -ENOMEM;
-
- DEBUG_ADD_FILE_RO(ver);
- DEBUG_ADD_FILE_RO(regs);
- DEBUG_ADD_FILE_RO(tlb);
- DEBUG_ADD_FILE(pagetable);
- DEBUG_ADD_FILE_RO(mmap);
- DEBUG_ADD_FILE(mem);
-
- return 0;
-}
-
-static int __init iommu_debug_init(void)
-{
- struct dentry *d;
- int err;
-
- d = debugfs_create_dir("iommu", NULL);
- if (!d)
- return -ENOMEM;
- iommu_debug_root = d;
-
- err = foreach_iommu_device(d, iommu_debug_register);
- if (err)
- goto err_out;
- return 0;
-
-err_out:
- debugfs_remove_recursive(iommu_debug_root);
- return err;
-}
-module_init(iommu_debug_init)
-
-static void __exit iommu_debugfs_exit(void)
-{
- debugfs_remove_recursive(iommu_debug_root);
-}
-module_exit(iommu_debugfs_exit)
-
-MODULE_DESCRIPTION("omap iommu: debugfs interface");
-MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>");
-MODULE_LICENSE("GPL v2");