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314eeac9e3
The feature needs some more work because the notfier which is used to check for pending allocations is called before the device drivers ->remove() function. Therefore this feature reports false positives. A real fix for this issue is to introduce a new notifier event which sent _after_ the driver has deinitialized itself. That will done for the next kernel version. [ Impact: reduce the scope of CONFIG_DMA_API_DEBUG=y checks ] Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org LKML-Reference: <1240576557-22442-1-git-send-email-joerg.roedel@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
905 lines
22 KiB
C
905 lines
22 KiB
C
/*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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*
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* Author: Joerg Roedel <joerg.roedel@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/scatterlist.h>
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#include <linux/dma-mapping.h>
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#include <linux/stacktrace.h>
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#include <linux/dma-debug.h>
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#include <linux/spinlock.h>
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <asm/sections.h>
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#define HASH_SIZE 1024ULL
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#define HASH_FN_SHIFT 13
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#define HASH_FN_MASK (HASH_SIZE - 1)
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enum {
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dma_debug_single,
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dma_debug_page,
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dma_debug_sg,
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dma_debug_coherent,
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};
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#define DMA_DEBUG_STACKTRACE_ENTRIES 5
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struct dma_debug_entry {
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struct list_head list;
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struct device *dev;
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int type;
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phys_addr_t paddr;
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u64 dev_addr;
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u64 size;
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int direction;
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int sg_call_ents;
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int sg_mapped_ents;
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#ifdef CONFIG_STACKTRACE
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struct stack_trace stacktrace;
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unsigned long st_entries[DMA_DEBUG_STACKTRACE_ENTRIES];
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#endif
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};
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struct hash_bucket {
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struct list_head list;
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spinlock_t lock;
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} ____cacheline_aligned_in_smp;
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/* Hash list to save the allocated dma addresses */
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static struct hash_bucket dma_entry_hash[HASH_SIZE];
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/* List of pre-allocated dma_debug_entry's */
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static LIST_HEAD(free_entries);
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/* Lock for the list above */
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static DEFINE_SPINLOCK(free_entries_lock);
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/* Global disable flag - will be set in case of an error */
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static bool global_disable __read_mostly;
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/* Global error count */
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static u32 error_count;
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/* Global error show enable*/
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static u32 show_all_errors __read_mostly;
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/* Number of errors to show */
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static u32 show_num_errors = 1;
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static u32 num_free_entries;
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static u32 min_free_entries;
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/* number of preallocated entries requested by kernel cmdline */
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static u32 req_entries;
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/* debugfs dentry's for the stuff above */
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static struct dentry *dma_debug_dent __read_mostly;
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static struct dentry *global_disable_dent __read_mostly;
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static struct dentry *error_count_dent __read_mostly;
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static struct dentry *show_all_errors_dent __read_mostly;
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static struct dentry *show_num_errors_dent __read_mostly;
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static struct dentry *num_free_entries_dent __read_mostly;
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static struct dentry *min_free_entries_dent __read_mostly;
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static const char *type2name[4] = { "single", "page",
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"scather-gather", "coherent" };
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static const char *dir2name[4] = { "DMA_BIDIRECTIONAL", "DMA_TO_DEVICE",
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"DMA_FROM_DEVICE", "DMA_NONE" };
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/*
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* The access to some variables in this macro is racy. We can't use atomic_t
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* here because all these variables are exported to debugfs. Some of them even
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* writeable. This is also the reason why a lock won't help much. But anyway,
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* the races are no big deal. Here is why:
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*
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* error_count: the addition is racy, but the worst thing that can happen is
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* that we don't count some errors
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* show_num_errors: the subtraction is racy. Also no big deal because in
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* worst case this will result in one warning more in the
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* system log than the user configured. This variable is
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* writeable via debugfs.
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*/
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static inline void dump_entry_trace(struct dma_debug_entry *entry)
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{
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#ifdef CONFIG_STACKTRACE
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if (entry) {
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printk(KERN_WARNING "Mapped at:\n");
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print_stack_trace(&entry->stacktrace, 0);
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}
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#endif
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}
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#define err_printk(dev, entry, format, arg...) do { \
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error_count += 1; \
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if (show_all_errors || show_num_errors > 0) { \
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WARN(1, "%s %s: " format, \
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dev_driver_string(dev), \
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dev_name(dev) , ## arg); \
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dump_entry_trace(entry); \
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} \
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if (!show_all_errors && show_num_errors > 0) \
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show_num_errors -= 1; \
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} while (0);
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/*
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* Hash related functions
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*
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* Every DMA-API request is saved into a struct dma_debug_entry. To
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* have quick access to these structs they are stored into a hash.
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*/
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static int hash_fn(struct dma_debug_entry *entry)
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{
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/*
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* Hash function is based on the dma address.
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* We use bits 20-27 here as the index into the hash
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*/
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return (entry->dev_addr >> HASH_FN_SHIFT) & HASH_FN_MASK;
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}
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/*
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* Request exclusive access to a hash bucket for a given dma_debug_entry.
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*/
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static struct hash_bucket *get_hash_bucket(struct dma_debug_entry *entry,
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unsigned long *flags)
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{
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int idx = hash_fn(entry);
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unsigned long __flags;
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spin_lock_irqsave(&dma_entry_hash[idx].lock, __flags);
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*flags = __flags;
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return &dma_entry_hash[idx];
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}
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/*
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* Give up exclusive access to the hash bucket
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*/
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static void put_hash_bucket(struct hash_bucket *bucket,
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unsigned long *flags)
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{
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unsigned long __flags = *flags;
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spin_unlock_irqrestore(&bucket->lock, __flags);
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}
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/*
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* Search a given entry in the hash bucket list
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*/
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static struct dma_debug_entry *hash_bucket_find(struct hash_bucket *bucket,
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struct dma_debug_entry *ref)
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{
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struct dma_debug_entry *entry;
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list_for_each_entry(entry, &bucket->list, list) {
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if ((entry->dev_addr == ref->dev_addr) &&
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(entry->dev == ref->dev))
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return entry;
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}
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return NULL;
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}
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/*
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* Add an entry to a hash bucket
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*/
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static void hash_bucket_add(struct hash_bucket *bucket,
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struct dma_debug_entry *entry)
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{
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list_add_tail(&entry->list, &bucket->list);
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}
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/*
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* Remove entry from a hash bucket list
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*/
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static void hash_bucket_del(struct dma_debug_entry *entry)
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{
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list_del(&entry->list);
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}
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/*
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* Dump mapping entries for debugging purposes
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*/
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void debug_dma_dump_mappings(struct device *dev)
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{
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int idx;
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for (idx = 0; idx < HASH_SIZE; idx++) {
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struct hash_bucket *bucket = &dma_entry_hash[idx];
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struct dma_debug_entry *entry;
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unsigned long flags;
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spin_lock_irqsave(&bucket->lock, flags);
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list_for_each_entry(entry, &bucket->list, list) {
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if (!dev || dev == entry->dev) {
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dev_info(entry->dev,
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"%s idx %d P=%Lx D=%Lx L=%Lx %s\n",
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type2name[entry->type], idx,
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(unsigned long long)entry->paddr,
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entry->dev_addr, entry->size,
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dir2name[entry->direction]);
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}
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}
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spin_unlock_irqrestore(&bucket->lock, flags);
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}
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}
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EXPORT_SYMBOL(debug_dma_dump_mappings);
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/*
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* Wrapper function for adding an entry to the hash.
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* This function takes care of locking itself.
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*/
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static void add_dma_entry(struct dma_debug_entry *entry)
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{
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struct hash_bucket *bucket;
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unsigned long flags;
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bucket = get_hash_bucket(entry, &flags);
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hash_bucket_add(bucket, entry);
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put_hash_bucket(bucket, &flags);
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}
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/* struct dma_entry allocator
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*
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* The next two functions implement the allocator for
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* struct dma_debug_entries.
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*/
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static struct dma_debug_entry *dma_entry_alloc(void)
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{
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struct dma_debug_entry *entry = NULL;
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unsigned long flags;
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spin_lock_irqsave(&free_entries_lock, flags);
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if (list_empty(&free_entries)) {
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printk(KERN_ERR "DMA-API: debugging out of memory "
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"- disabling\n");
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global_disable = true;
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goto out;
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}
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entry = list_entry(free_entries.next, struct dma_debug_entry, list);
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list_del(&entry->list);
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memset(entry, 0, sizeof(*entry));
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#ifdef CONFIG_STACKTRACE
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entry->stacktrace.max_entries = DMA_DEBUG_STACKTRACE_ENTRIES;
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entry->stacktrace.entries = entry->st_entries;
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entry->stacktrace.skip = 2;
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save_stack_trace(&entry->stacktrace);
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#endif
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num_free_entries -= 1;
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if (num_free_entries < min_free_entries)
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min_free_entries = num_free_entries;
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out:
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spin_unlock_irqrestore(&free_entries_lock, flags);
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return entry;
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}
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static void dma_entry_free(struct dma_debug_entry *entry)
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{
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unsigned long flags;
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/*
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* add to beginning of the list - this way the entries are
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* more likely cache hot when they are reallocated.
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*/
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spin_lock_irqsave(&free_entries_lock, flags);
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list_add(&entry->list, &free_entries);
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num_free_entries += 1;
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spin_unlock_irqrestore(&free_entries_lock, flags);
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}
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/*
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* DMA-API debugging init code
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*
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* The init code does two things:
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* 1. Initialize core data structures
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* 2. Preallocate a given number of dma_debug_entry structs
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*/
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static int prealloc_memory(u32 num_entries)
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{
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struct dma_debug_entry *entry, *next_entry;
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int i;
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for (i = 0; i < num_entries; ++i) {
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entry = kzalloc(sizeof(*entry), GFP_KERNEL);
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if (!entry)
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goto out_err;
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list_add_tail(&entry->list, &free_entries);
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}
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num_free_entries = num_entries;
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min_free_entries = num_entries;
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printk(KERN_INFO "DMA-API: preallocated %d debug entries\n",
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num_entries);
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return 0;
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out_err:
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list_for_each_entry_safe(entry, next_entry, &free_entries, list) {
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list_del(&entry->list);
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kfree(entry);
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}
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return -ENOMEM;
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}
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static int dma_debug_fs_init(void)
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{
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dma_debug_dent = debugfs_create_dir("dma-api", NULL);
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if (!dma_debug_dent) {
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printk(KERN_ERR "DMA-API: can not create debugfs directory\n");
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return -ENOMEM;
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}
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global_disable_dent = debugfs_create_bool("disabled", 0444,
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dma_debug_dent,
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(u32 *)&global_disable);
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if (!global_disable_dent)
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goto out_err;
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error_count_dent = debugfs_create_u32("error_count", 0444,
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dma_debug_dent, &error_count);
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if (!error_count_dent)
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goto out_err;
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show_all_errors_dent = debugfs_create_u32("all_errors", 0644,
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dma_debug_dent,
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&show_all_errors);
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if (!show_all_errors_dent)
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goto out_err;
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show_num_errors_dent = debugfs_create_u32("num_errors", 0644,
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dma_debug_dent,
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&show_num_errors);
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if (!show_num_errors_dent)
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goto out_err;
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num_free_entries_dent = debugfs_create_u32("num_free_entries", 0444,
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dma_debug_dent,
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&num_free_entries);
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if (!num_free_entries_dent)
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goto out_err;
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min_free_entries_dent = debugfs_create_u32("min_free_entries", 0444,
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dma_debug_dent,
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&min_free_entries);
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if (!min_free_entries_dent)
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goto out_err;
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return 0;
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out_err:
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debugfs_remove_recursive(dma_debug_dent);
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return -ENOMEM;
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}
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void dma_debug_add_bus(struct bus_type *bus)
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{
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/* FIXME: register notifier */
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}
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/*
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* Let the architectures decide how many entries should be preallocated.
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*/
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void dma_debug_init(u32 num_entries)
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{
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int i;
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if (global_disable)
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return;
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for (i = 0; i < HASH_SIZE; ++i) {
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INIT_LIST_HEAD(&dma_entry_hash[i].list);
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dma_entry_hash[i].lock = SPIN_LOCK_UNLOCKED;
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}
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if (dma_debug_fs_init() != 0) {
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printk(KERN_ERR "DMA-API: error creating debugfs entries "
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"- disabling\n");
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global_disable = true;
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return;
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}
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if (req_entries)
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num_entries = req_entries;
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if (prealloc_memory(num_entries) != 0) {
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printk(KERN_ERR "DMA-API: debugging out of memory error "
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"- disabled\n");
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global_disable = true;
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return;
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}
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printk(KERN_INFO "DMA-API: debugging enabled by kernel config\n");
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}
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static __init int dma_debug_cmdline(char *str)
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{
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if (!str)
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return -EINVAL;
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if (strncmp(str, "off", 3) == 0) {
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printk(KERN_INFO "DMA-API: debugging disabled on kernel "
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"command line\n");
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global_disable = true;
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}
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return 0;
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}
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static __init int dma_debug_entries_cmdline(char *str)
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{
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int res;
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if (!str)
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return -EINVAL;
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res = get_option(&str, &req_entries);
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|
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if (!res)
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req_entries = 0;
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return 0;
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}
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__setup("dma_debug=", dma_debug_cmdline);
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__setup("dma_debug_entries=", dma_debug_entries_cmdline);
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|
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static void check_unmap(struct dma_debug_entry *ref)
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{
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struct dma_debug_entry *entry;
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struct hash_bucket *bucket;
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unsigned long flags;
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|
|
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if (dma_mapping_error(ref->dev, ref->dev_addr)) {
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err_printk(ref->dev, NULL, "DMA-API: device driver tries "
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"to free an invalid DMA memory address\n");
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return;
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}
|
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|
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bucket = get_hash_bucket(ref, &flags);
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entry = hash_bucket_find(bucket, ref);
|
|
|
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if (!entry) {
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err_printk(ref->dev, NULL, "DMA-API: device driver tries "
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"to free DMA memory it has not allocated "
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"[device address=0x%016llx] [size=%llu bytes]\n",
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ref->dev_addr, ref->size);
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goto out;
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}
|
|
|
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if (ref->size != entry->size) {
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err_printk(ref->dev, entry, "DMA-API: device driver frees "
|
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"DMA memory with different size "
|
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"[device address=0x%016llx] [map size=%llu bytes] "
|
|
"[unmap size=%llu bytes]\n",
|
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ref->dev_addr, entry->size, ref->size);
|
|
}
|
|
|
|
if (ref->type != entry->type) {
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|
err_printk(ref->dev, entry, "DMA-API: device driver frees "
|
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"DMA memory with wrong function "
|
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"[device address=0x%016llx] [size=%llu bytes] "
|
|
"[mapped as %s] [unmapped as %s]\n",
|
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ref->dev_addr, ref->size,
|
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type2name[entry->type], type2name[ref->type]);
|
|
} else if ((entry->type == dma_debug_coherent) &&
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(ref->paddr != entry->paddr)) {
|
|
err_printk(ref->dev, entry, "DMA-API: device driver frees "
|
|
"DMA memory with different CPU address "
|
|
"[device address=0x%016llx] [size=%llu bytes] "
|
|
"[cpu alloc address=%p] [cpu free address=%p]",
|
|
ref->dev_addr, ref->size,
|
|
(void *)entry->paddr, (void *)ref->paddr);
|
|
}
|
|
|
|
if (ref->sg_call_ents && ref->type == dma_debug_sg &&
|
|
ref->sg_call_ents != entry->sg_call_ents) {
|
|
err_printk(ref->dev, entry, "DMA-API: device driver frees "
|
|
"DMA sg list with different entry count "
|
|
"[map count=%d] [unmap count=%d]\n",
|
|
entry->sg_call_ents, ref->sg_call_ents);
|
|
}
|
|
|
|
/*
|
|
* This may be no bug in reality - but most implementations of the
|
|
* DMA API don't handle this properly, so check for it here
|
|
*/
|
|
if (ref->direction != entry->direction) {
|
|
err_printk(ref->dev, entry, "DMA-API: device driver frees "
|
|
"DMA memory with different direction "
|
|
"[device address=0x%016llx] [size=%llu bytes] "
|
|
"[mapped with %s] [unmapped with %s]\n",
|
|
ref->dev_addr, ref->size,
|
|
dir2name[entry->direction],
|
|
dir2name[ref->direction]);
|
|
}
|
|
|
|
hash_bucket_del(entry);
|
|
dma_entry_free(entry);
|
|
|
|
out:
|
|
put_hash_bucket(bucket, &flags);
|
|
}
|
|
|
|
static void check_for_stack(struct device *dev, void *addr)
|
|
{
|
|
if (object_is_on_stack(addr))
|
|
err_printk(dev, NULL, "DMA-API: device driver maps memory from"
|
|
"stack [addr=%p]\n", addr);
|
|
}
|
|
|
|
static inline bool overlap(void *addr, u64 size, void *start, void *end)
|
|
{
|
|
void *addr2 = (char *)addr + size;
|
|
|
|
return ((addr >= start && addr < end) ||
|
|
(addr2 >= start && addr2 < end) ||
|
|
((addr < start) && (addr2 >= end)));
|
|
}
|
|
|
|
static void check_for_illegal_area(struct device *dev, void *addr, u64 size)
|
|
{
|
|
if (overlap(addr, size, _text, _etext) ||
|
|
overlap(addr, size, __start_rodata, __end_rodata))
|
|
err_printk(dev, NULL, "DMA-API: device driver maps "
|
|
"memory from kernel text or rodata "
|
|
"[addr=%p] [size=%llu]\n", addr, size);
|
|
}
|
|
|
|
static void check_sync(struct device *dev, dma_addr_t addr,
|
|
u64 size, u64 offset, int direction, bool to_cpu)
|
|
{
|
|
struct dma_debug_entry ref = {
|
|
.dev = dev,
|
|
.dev_addr = addr,
|
|
.size = size,
|
|
.direction = direction,
|
|
};
|
|
struct dma_debug_entry *entry;
|
|
struct hash_bucket *bucket;
|
|
unsigned long flags;
|
|
|
|
bucket = get_hash_bucket(&ref, &flags);
|
|
|
|
entry = hash_bucket_find(bucket, &ref);
|
|
|
|
if (!entry) {
|
|
err_printk(dev, NULL, "DMA-API: device driver tries "
|
|
"to sync DMA memory it has not allocated "
|
|
"[device address=0x%016llx] [size=%llu bytes]\n",
|
|
(unsigned long long)addr, size);
|
|
goto out;
|
|
}
|
|
|
|
if ((offset + size) > entry->size) {
|
|
err_printk(dev, entry, "DMA-API: device driver syncs"
|
|
" DMA memory outside allocated range "
|
|
"[device address=0x%016llx] "
|
|
"[allocation size=%llu bytes] [sync offset=%llu] "
|
|
"[sync size=%llu]\n", entry->dev_addr, entry->size,
|
|
offset, size);
|
|
}
|
|
|
|
if (direction != entry->direction) {
|
|
err_printk(dev, entry, "DMA-API: device driver syncs "
|
|
"DMA memory with different direction "
|
|
"[device address=0x%016llx] [size=%llu bytes] "
|
|
"[mapped with %s] [synced with %s]\n",
|
|
(unsigned long long)addr, entry->size,
|
|
dir2name[entry->direction],
|
|
dir2name[direction]);
|
|
}
|
|
|
|
if (entry->direction == DMA_BIDIRECTIONAL)
|
|
goto out;
|
|
|
|
if (to_cpu && !(entry->direction == DMA_FROM_DEVICE) &&
|
|
!(direction == DMA_TO_DEVICE))
|
|
err_printk(dev, entry, "DMA-API: device driver syncs "
|
|
"device read-only DMA memory for cpu "
|
|
"[device address=0x%016llx] [size=%llu bytes] "
|
|
"[mapped with %s] [synced with %s]\n",
|
|
(unsigned long long)addr, entry->size,
|
|
dir2name[entry->direction],
|
|
dir2name[direction]);
|
|
|
|
if (!to_cpu && !(entry->direction == DMA_TO_DEVICE) &&
|
|
!(direction == DMA_FROM_DEVICE))
|
|
err_printk(dev, entry, "DMA-API: device driver syncs "
|
|
"device write-only DMA memory to device "
|
|
"[device address=0x%016llx] [size=%llu bytes] "
|
|
"[mapped with %s] [synced with %s]\n",
|
|
(unsigned long long)addr, entry->size,
|
|
dir2name[entry->direction],
|
|
dir2name[direction]);
|
|
|
|
out:
|
|
put_hash_bucket(bucket, &flags);
|
|
|
|
}
|
|
|
|
void debug_dma_map_page(struct device *dev, struct page *page, size_t offset,
|
|
size_t size, int direction, dma_addr_t dma_addr,
|
|
bool map_single)
|
|
{
|
|
struct dma_debug_entry *entry;
|
|
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
if (unlikely(dma_mapping_error(dev, dma_addr)))
|
|
return;
|
|
|
|
entry = dma_entry_alloc();
|
|
if (!entry)
|
|
return;
|
|
|
|
entry->dev = dev;
|
|
entry->type = dma_debug_page;
|
|
entry->paddr = page_to_phys(page) + offset;
|
|
entry->dev_addr = dma_addr;
|
|
entry->size = size;
|
|
entry->direction = direction;
|
|
|
|
if (map_single)
|
|
entry->type = dma_debug_single;
|
|
|
|
if (!PageHighMem(page)) {
|
|
void *addr = ((char *)page_address(page)) + offset;
|
|
check_for_stack(dev, addr);
|
|
check_for_illegal_area(dev, addr, size);
|
|
}
|
|
|
|
add_dma_entry(entry);
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_map_page);
|
|
|
|
void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
|
|
size_t size, int direction, bool map_single)
|
|
{
|
|
struct dma_debug_entry ref = {
|
|
.type = dma_debug_page,
|
|
.dev = dev,
|
|
.dev_addr = addr,
|
|
.size = size,
|
|
.direction = direction,
|
|
};
|
|
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
if (map_single)
|
|
ref.type = dma_debug_single;
|
|
|
|
check_unmap(&ref);
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_unmap_page);
|
|
|
|
void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
|
|
int nents, int mapped_ents, int direction)
|
|
{
|
|
struct dma_debug_entry *entry;
|
|
struct scatterlist *s;
|
|
int i;
|
|
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
for_each_sg(sg, s, mapped_ents, i) {
|
|
entry = dma_entry_alloc();
|
|
if (!entry)
|
|
return;
|
|
|
|
entry->type = dma_debug_sg;
|
|
entry->dev = dev;
|
|
entry->paddr = sg_phys(s);
|
|
entry->size = s->length;
|
|
entry->dev_addr = s->dma_address;
|
|
entry->direction = direction;
|
|
entry->sg_call_ents = nents;
|
|
entry->sg_mapped_ents = mapped_ents;
|
|
|
|
if (!PageHighMem(sg_page(s))) {
|
|
check_for_stack(dev, sg_virt(s));
|
|
check_for_illegal_area(dev, sg_virt(s), s->length);
|
|
}
|
|
|
|
add_dma_entry(entry);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_map_sg);
|
|
|
|
void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
|
|
int nelems, int dir)
|
|
{
|
|
struct dma_debug_entry *entry;
|
|
struct scatterlist *s;
|
|
int mapped_ents = 0, i;
|
|
unsigned long flags;
|
|
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
for_each_sg(sglist, s, nelems, i) {
|
|
|
|
struct dma_debug_entry ref = {
|
|
.type = dma_debug_sg,
|
|
.dev = dev,
|
|
.paddr = sg_phys(s),
|
|
.dev_addr = s->dma_address,
|
|
.size = s->length,
|
|
.direction = dir,
|
|
.sg_call_ents = 0,
|
|
};
|
|
|
|
if (mapped_ents && i >= mapped_ents)
|
|
break;
|
|
|
|
if (mapped_ents == 0) {
|
|
struct hash_bucket *bucket;
|
|
ref.sg_call_ents = nelems;
|
|
bucket = get_hash_bucket(&ref, &flags);
|
|
entry = hash_bucket_find(bucket, &ref);
|
|
if (entry)
|
|
mapped_ents = entry->sg_mapped_ents;
|
|
put_hash_bucket(bucket, &flags);
|
|
}
|
|
|
|
check_unmap(&ref);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_unmap_sg);
|
|
|
|
void debug_dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t dma_addr, void *virt)
|
|
{
|
|
struct dma_debug_entry *entry;
|
|
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
if (unlikely(virt == NULL))
|
|
return;
|
|
|
|
entry = dma_entry_alloc();
|
|
if (!entry)
|
|
return;
|
|
|
|
entry->type = dma_debug_coherent;
|
|
entry->dev = dev;
|
|
entry->paddr = virt_to_phys(virt);
|
|
entry->size = size;
|
|
entry->dev_addr = dma_addr;
|
|
entry->direction = DMA_BIDIRECTIONAL;
|
|
|
|
add_dma_entry(entry);
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_alloc_coherent);
|
|
|
|
void debug_dma_free_coherent(struct device *dev, size_t size,
|
|
void *virt, dma_addr_t addr)
|
|
{
|
|
struct dma_debug_entry ref = {
|
|
.type = dma_debug_coherent,
|
|
.dev = dev,
|
|
.paddr = virt_to_phys(virt),
|
|
.dev_addr = addr,
|
|
.size = size,
|
|
.direction = DMA_BIDIRECTIONAL,
|
|
};
|
|
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
check_unmap(&ref);
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_free_coherent);
|
|
|
|
void debug_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
|
|
size_t size, int direction)
|
|
{
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
check_sync(dev, dma_handle, size, 0, direction, true);
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_sync_single_for_cpu);
|
|
|
|
void debug_dma_sync_single_for_device(struct device *dev,
|
|
dma_addr_t dma_handle, size_t size,
|
|
int direction)
|
|
{
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
check_sync(dev, dma_handle, size, 0, direction, false);
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_sync_single_for_device);
|
|
|
|
void debug_dma_sync_single_range_for_cpu(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
unsigned long offset, size_t size,
|
|
int direction)
|
|
{
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
check_sync(dev, dma_handle, size, offset, direction, true);
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_sync_single_range_for_cpu);
|
|
|
|
void debug_dma_sync_single_range_for_device(struct device *dev,
|
|
dma_addr_t dma_handle,
|
|
unsigned long offset,
|
|
size_t size, int direction)
|
|
{
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
check_sync(dev, dma_handle, size, offset, direction, false);
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_sync_single_range_for_device);
|
|
|
|
void debug_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
|
|
int nelems, int direction)
|
|
{
|
|
struct scatterlist *s;
|
|
int i;
|
|
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
for_each_sg(sg, s, nelems, i) {
|
|
check_sync(dev, s->dma_address, s->dma_length, 0,
|
|
direction, true);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_sync_sg_for_cpu);
|
|
|
|
void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
|
|
int nelems, int direction)
|
|
{
|
|
struct scatterlist *s;
|
|
int i;
|
|
|
|
if (unlikely(global_disable))
|
|
return;
|
|
|
|
for_each_sg(sg, s, nelems, i) {
|
|
check_sync(dev, s->dma_address, s->dma_length, 0,
|
|
direction, false);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(debug_dma_sync_sg_for_device);
|
|
|