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rk: ion: Add ion snapshot function for debug

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currently supported features: buffer allocation failure in time to
  save the current ion each heap and client status, etc.
This commit is contained in:
CMY
2014-04-14 10:10:29 +08:00
parent 0ec6331708
commit c934f4e7a2
4 changed files with 60 additions and 0 deletions
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56
drivers/staging/android/ion/ion.c
View File

@@ -2022,3 +2022,59 @@ void __init ion_reserve(struct ion_platform_data *data)
data->heaps[i].size);
}
}
#define ION_SNAPSHOT_BUFFER_LEN 1<<18
int ion_snapshot_save(struct ion_device *idev)
{
static struct seq_file seqf;
struct ion_heap *heap;
struct rb_node *n;
if (!seqf.buf) {
seqf.size = ION_SNAPSHOT_BUFFER_LEN;
seqf.buf = kmalloc(seqf.size, GFP_KERNEL);
if (!seqf.buf)
return -ENOMEM;
printk("%s: create snapshot 0x%x@0x%lx\n", __func__, seqf.size,
__pa(seqf.buf));
} else {
printk("%s: save snapshot 0x%x@0x%lx\n", __func__, seqf.size,
__pa(seqf.buf));
memset(seqf.buf, 0, seqf.size);
seqf.count = 0;
}
down_read(&idev->lock);
plist_for_each_entry(heap, &idev->heaps, node) {
seqf.private = (void*)heap;
seq_printf(&seqf, "++++++++++++++++ HEAP: %s ++++++++++++++++\n",
heap->name);
ion_debug_heap_show(&seqf, NULL);
seq_printf(&seqf, "\n");
if (ION_HEAP_TYPE_DMA==heap->type)
ion_cma_heap_debug_show(&seqf, NULL);
}
for (n = rb_first(&idev->clients); n; n = rb_next(n)) {
struct ion_client *client = rb_entry(n, struct ion_client, node);
seqf.private = (void*)client;
if (client->task) {
char task_comm[TASK_COMM_LEN];
get_task_comm(task_comm, client->task);
seq_printf(&seqf, "++++++++++++++++ CLIENT: %s(PID-%d) ++++++++++++++++\n",
task_comm, client->pid);
} else {
seq_printf(&seqf, "++++++++++++++++ CLIENT: %s(PID-%d) ++++++++++++++++\n",
client->display_name, client->pid);
}
ion_debug_client_show(&seqf, NULL);
seq_printf(&seqf, "\n");
}
up_read(&idev->lock);
return 0;
}

1
drivers/staging/android/ion/ion_cma_heap.c
View File

@@ -120,6 +120,7 @@ free_mem:
dma_free_coherent(dev, len, info->cpu_addr, info->handle);
err:
kfree(info);
ion_snapshot_save(heap->dev);
return ION_CMA_ALLOCATE_FAILED;
}

2
drivers/staging/android/ion/ion_priv.h
View File

@@ -436,4 +436,6 @@ int ion_page_pool_shrink(struct ion_page_pool *pool, gfp_t gfp_mask,
void ion_pages_sync_for_device(struct device *dev, struct page *page,
size_t size, enum dma_data_direction dir);
int ion_snapshot_save(struct ion_device *idev);
#endif /* _ION_PRIV_H */

1
drivers/staging/android/ion/ion_system_heap.c
View File

@@ -193,6 +193,7 @@ err:
free_buffer_page(sys_heap, buffer, info->page, info->order);
kfree(info);
}
ion_snapshot_save(heap->dev);
return -ENOMEM;
}