From 479623fd0c5ad86a43ae11670f7da2a7c462acd4 Mon Sep 17 00:00:00 2001 From: Desnes Nunes Date: Thu, 16 Mar 2023 11:09:10 -0300 Subject: dma-debug: small dma_debug_entry's comment and variable name updates Small update on dma_debug_entry's struct commentary and also standardize the usage of 'dma_addr' variable name from debug_dma_map_page() on debug_dma_unmap_page(), and similarly on debug_dma_free_coherent() Signed-off-by: Desnes Nunes Signed-off-by: Christoph Hellwig --- kernel/dma/debug.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'kernel/dma/debug.c') diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index 18c93c2276ca..9aa5100d0d7e 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -53,6 +53,7 @@ enum map_err_types { * struct dma_debug_entry - track a dma_map* or dma_alloc_coherent mapping * @list: node on pre-allocated free_entries list * @dev: 'dev' argument to dma_map_{page|single|sg} or dma_alloc_coherent + * @dev_addr: dma address * @size: length of the mapping * @type: single, page, sg, coherent * @direction: enum dma_data_direction @@ -1262,13 +1263,13 @@ void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr) } EXPORT_SYMBOL(debug_dma_mapping_error); -void debug_dma_unmap_page(struct device *dev, dma_addr_t addr, +void debug_dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, int direction) { struct dma_debug_entry ref = { .type = dma_debug_single, .dev = dev, - .dev_addr = addr, + .dev_addr = dma_addr, .size = size, .direction = direction, }; @@ -1403,13 +1404,13 @@ void debug_dma_alloc_coherent(struct device *dev, size_t size, } void debug_dma_free_coherent(struct device *dev, size_t size, - void *virt, dma_addr_t addr) + void *virt, dma_addr_t dma_addr) { struct dma_debug_entry ref = { .type = dma_debug_coherent, .dev = dev, .offset = offset_in_page(virt), - .dev_addr = addr, + .dev_addr = dma_addr, .size = size, .direction = DMA_BIDIRECTIONAL, }; -- cgit From bd89d69a529fbef3559a16dbe4cee4b04225136a Mon Sep 17 00:00:00 2001 From: Desnes Nunes Date: Thu, 16 Mar 2023 11:09:11 -0300 Subject: dma-debug: add cacheline to user/kernel space dump messages Having the cacheline also printed on the debug_dma_dump_mappings() and dump_show() is useful for debugging. Furthermore, this also standardizes the messages shown on both dump functions. Signed-off-by: Desnes Nunes Signed-off-by: Christoph Hellwig --- kernel/dma/debug.c | 122 ++++++++++++++++++++++++++++------------------------- 1 file changed, 64 insertions(+), 58 deletions(-) (limited to 'kernel/dma/debug.c') diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index 9aa5100d0d7e..676142072d99 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -396,37 +396,6 @@ static unsigned long long phys_addr(struct dma_debug_entry *entry) return page_to_phys(pfn_to_page(entry->pfn)) + entry->offset; } -/* - * Dump mapping entries for debugging purposes - */ -void debug_dma_dump_mappings(struct device *dev) -{ - int idx; - - for (idx = 0; idx < HASH_SIZE; idx++) { - struct hash_bucket *bucket = &dma_entry_hash[idx]; - struct dma_debug_entry *entry; - unsigned long flags; - - spin_lock_irqsave(&bucket->lock, flags); - - list_for_each_entry(entry, &bucket->list, list) { - if (!dev || dev == entry->dev) { - dev_info(entry->dev, - "%s idx %d P=%Lx N=%lx D=%Lx L=%Lx %s %s\n", - type2name[entry->type], idx, - phys_addr(entry), entry->pfn, - entry->dev_addr, entry->size, - dir2name[entry->direction], - maperr2str[entry->map_err_type]); - } - } - - spin_unlock_irqrestore(&bucket->lock, flags); - cond_resched(); - } -} - /* * For each mapping (initial cacheline in the case of * dma_alloc_coherent/dma_map_page, initial cacheline in each page of a @@ -547,6 +516,70 @@ static void active_cacheline_remove(struct dma_debug_entry *entry) spin_unlock_irqrestore(&radix_lock, flags); } +/* + * Dump mappings entries on kernel space for debugging purposes + */ +void debug_dma_dump_mappings(struct device *dev) +{ + int idx; + phys_addr_t cln; + + for (idx = 0; idx < HASH_SIZE; idx++) { + struct hash_bucket *bucket = &dma_entry_hash[idx]; + struct dma_debug_entry *entry; + unsigned long flags; + + spin_lock_irqsave(&bucket->lock, flags); + list_for_each_entry(entry, &bucket->list, list) { + if (!dev || dev == entry->dev) { + cln = to_cacheline_number(entry); + dev_info(entry->dev, + "%s idx %d P=%llx N=%lx D=%llx L=%llx cln=%llx %s %s\n", + type2name[entry->type], idx, + phys_addr(entry), entry->pfn, + entry->dev_addr, entry->size, + cln, dir2name[entry->direction], + maperr2str[entry->map_err_type]); + } + } + spin_unlock_irqrestore(&bucket->lock, flags); + + cond_resched(); + } +} + +/* + * Dump mappings entries on user space via debugfs + */ +static int dump_show(struct seq_file *seq, void *v) +{ + int idx; + phys_addr_t cln; + + for (idx = 0; idx < HASH_SIZE; idx++) { + struct hash_bucket *bucket = &dma_entry_hash[idx]; + struct dma_debug_entry *entry; + unsigned long flags; + + spin_lock_irqsave(&bucket->lock, flags); + list_for_each_entry(entry, &bucket->list, list) { + cln = to_cacheline_number(entry); + seq_printf(seq, + "%s %s %s idx %d P=%llx N=%lx D=%llx L=%llx cln=%llx %s %s\n", + dev_driver_string(entry->dev), + dev_name(entry->dev), + type2name[entry->type], idx, + phys_addr(entry), entry->pfn, + entry->dev_addr, entry->size, + cln, dir2name[entry->direction], + maperr2str[entry->map_err_type]); + } + spin_unlock_irqrestore(&bucket->lock, flags); + } + return 0; +} +DEFINE_SHOW_ATTRIBUTE(dump); + /* * Wrapper function for adding an entry to the hash. * This function takes care of locking itself. @@ -765,33 +798,6 @@ static const struct file_operations filter_fops = { .llseek = default_llseek, }; -static int dump_show(struct seq_file *seq, void *v) -{ - int idx; - - for (idx = 0; idx < HASH_SIZE; idx++) { - struct hash_bucket *bucket = &dma_entry_hash[idx]; - struct dma_debug_entry *entry; - unsigned long flags; - - spin_lock_irqsave(&bucket->lock, flags); - list_for_each_entry(entry, &bucket->list, list) { - seq_printf(seq, - "%s %s %s idx %d P=%llx N=%lx D=%llx L=%llx %s %s\n", - dev_name(entry->dev), - dev_driver_string(entry->dev), - type2name[entry->type], idx, - phys_addr(entry), entry->pfn, - entry->dev_addr, entry->size, - dir2name[entry->direction], - maperr2str[entry->map_err_type]); - } - spin_unlock_irqrestore(&bucket->lock, flags); - } - return 0; -} -DEFINE_SHOW_ATTRIBUTE(dump); - static int __init dma_debug_fs_init(void) { struct dentry *dentry = debugfs_create_dir("dma-api", NULL); -- cgit From b31507dcaf3566d8ec3bdbf9922d8d5748b08a0f Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Wed, 29 Mar 2023 09:14:05 +0200 Subject: dma-debug: Use %pa to format phys_addr_t MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 32-bit without LPAE: kernel/dma/debug.c: In function ‘debug_dma_dump_mappings’: kernel/dma/debug.c:537:7: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 9 has type ‘phys_addr_t’ {aka ‘unsigned int’} [-Wformat=] kernel/dma/debug.c: In function ‘dump_show’: kernel/dma/debug.c:568:59: warning: format ‘%llx’ expects argument of type ‘long long unsigned int’, but argument 11 has type ‘phys_addr_t’ {aka ‘unsigned int’} [-Wformat=] Fixes: bd89d69a529fbef3 ("dma-debug: add cacheline to user/kernel space dump messages") Reported-by: kernel test robot Link: https://lore.kernel.org/r/202303160548.ReyuTsGD-lkp@intel.com Reported-by: noreply@ellerman.id.au Signed-off-by: Geert Uytterhoeven Signed-off-by: Christoph Hellwig --- kernel/dma/debug.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'kernel/dma/debug.c') diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index 676142072d99..f190651bcadd 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -534,11 +534,11 @@ void debug_dma_dump_mappings(struct device *dev) if (!dev || dev == entry->dev) { cln = to_cacheline_number(entry); dev_info(entry->dev, - "%s idx %d P=%llx N=%lx D=%llx L=%llx cln=%llx %s %s\n", + "%s idx %d P=%llx N=%lx D=%llx L=%llx cln=%pa %s %s\n", type2name[entry->type], idx, phys_addr(entry), entry->pfn, entry->dev_addr, entry->size, - cln, dir2name[entry->direction], + &cln, dir2name[entry->direction], maperr2str[entry->map_err_type]); } } @@ -565,13 +565,13 @@ static int dump_show(struct seq_file *seq, void *v) list_for_each_entry(entry, &bucket->list, list) { cln = to_cacheline_number(entry); seq_printf(seq, - "%s %s %s idx %d P=%llx N=%lx D=%llx L=%llx cln=%llx %s %s\n", + "%s %s %s idx %d P=%llx N=%lx D=%llx L=%llx cln=%pa %s %s\n", dev_driver_string(entry->dev), dev_name(entry->dev), type2name[entry->type], idx, phys_addr(entry), entry->pfn, entry->dev_addr, entry->size, - cln, dir2name[entry->direction], + &cln, dir2name[entry->direction], maperr2str[entry->map_err_type]); } spin_unlock_irqrestore(&bucket->lock, flags); -- cgit