From: CMY <cmy@rock-chips.com>
Date: Mon, 14 Apr 2014 02:10:29 +0000 (+0800)
Subject: rk: ion: Add ion snapshot function for debug
X-Git-Tag: firefly_0821_release~5564
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c934f4e7a2a1a1879b8ebbd30910ed5c474bf101;p=firefly-linux-kernel-4.4.55.git

rk: ion: Add ion snapshot function for debug
  currently supported features: buffer allocation failure in time to
  save the current ion each heap and client status, etc.
---

diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index 885cb60530bf..72d8b337696b 100755
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -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;
+}
diff --git a/drivers/staging/android/ion/ion_cma_heap.c b/drivers/staging/android/ion/ion_cma_heap.c
index 6cae791d881c..e70869e3172d 100755
--- a/drivers/staging/android/ion/ion_cma_heap.c
+++ b/drivers/staging/android/ion/ion_cma_heap.c
@@ -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;
 }
 
diff --git a/drivers/staging/android/ion/ion_priv.h b/drivers/staging/android/ion/ion_priv.h
index cb00d1b2e02c..e7a4ec923221 100755
--- a/drivers/staging/android/ion/ion_priv.h
+++ b/drivers/staging/android/ion/ion_priv.h
@@ -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 */
diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index e61993d3c2c4..5dccc34ecc3a 100755
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -193,6 +193,7 @@ err:
 		free_buffer_page(sys_heap, buffer, info->page, info->order);
 		kfree(info);
 	}
+	ion_snapshot_save(heap->dev);
 	return -ENOMEM;
 }