diff options
| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2007-02-12 10:53:50 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-02-12 10:53:50 +0000 |
| commit | 017cc022b6f0a0619cc3b0bba43e1c3247b06779 (patch) | |
| tree | ad89a72c1d764aa4f099a0e12d397e1649e1f756 /arch/arm | |
| parent | ab2c21529df6ee0f06787773882a1abc6bc2d665 (diff) | |
[ARM] Convert dmabounce statistics to use a device attribute
Rather than printk'ing the dmabounce statistics occasionally to
the kernel log, provide a sysfs file to allow this information
to be periodically read.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/common/dmabounce.c | 35 |
1 files changed, 15 insertions, 20 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index 490e1fe286d..4d5b031ac74 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -32,7 +32,6 @@ #include <asm/cacheflush.h> -#undef DEBUG #undef STATS #ifdef STATS @@ -72,6 +71,7 @@ struct dmabounce_device_info { unsigned long total_allocs; unsigned long map_op_count; unsigned long bounce_count; + int attr_res; #endif struct dmabounce_pool small; struct dmabounce_pool large; @@ -80,16 +80,21 @@ struct dmabounce_device_info { }; #ifdef STATS -static void print_alloc_stats(struct dmabounce_device_info *device_info) +static ssize_t dmabounce_show(struct device *dev, struct device_attribute *attr, + char *buf) { - printk(KERN_INFO - "%s: dmabounce: sbp: %lu, lbp: %lu, other: %lu, total: %lu\n", - device_info->dev->bus_id, - device_info->small.allocs, device_info->large.allocs, + struct dmabounce_device_info *device_info = dev->archdata.dmabounce; + return sprintf(buf, "%lu %lu %lu %lu %lu %lu\n", + device_info->small.allocs, + device_info->large.allocs, device_info->total_allocs - device_info->small.allocs - device_info->large.allocs, - device_info->total_allocs); + device_info->total_allocs, + device_info->map_op_count, + device_info->bounce_count); } + +static DEVICE_ATTR(dmabounce_stats, 0400, dmabounce_show, NULL); #endif @@ -145,8 +150,6 @@ alloc_safe_buffer(struct dmabounce_device_info *device_info, void *ptr, if (pool) pool->allocs++; device_info->total_allocs++; - if (device_info->total_allocs % 1000 == 0) - print_alloc_stats(device_info); #endif write_lock_irqsave(&device_info->lock, flags); @@ -201,15 +204,6 @@ free_safe_buffer(struct dmabounce_device_info *device_info, struct safe_buffer * /* ************************************************** */ -#ifdef STATS -static void print_map_stats(struct dmabounce_device_info *device_info) -{ - dev_info(device_info->dev, - "dmabounce: map_op_count=%lu, bounce_count=%lu\n", - device_info->map_op_count, device_info->bounce_count); -} -#endif - static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size, enum dma_data_direction dir) @@ -587,6 +581,7 @@ dmabounce_register_dev(struct device *dev, unsigned long small_buffer_size, device_info->total_allocs = 0; device_info->map_op_count = 0; device_info->bounce_count = 0; + device_info->attr_res = device_create_file(dev, &dev_attr_dmabounce_stats); #endif dev->archdata.dmabounce = device_info; @@ -630,8 +625,8 @@ dmabounce_unregister_dev(struct device *dev) dma_pool_destroy(device_info->large.pool); #ifdef STATS - print_alloc_stats(device_info); - print_map_stats(device_info); + if (device_info->attr_res == 0) + device_remove_file(dev, &dev_attr_dmabounce_stats); #endif kfree(device_info); |