Add support to dump video FW region during FW crash
using devcoredump helpers.
Signed-off-by: Dikshita Agarwal <dikshita@xxxxxxxxxxxxxx>
---
drivers/media/platform/qcom/venus/core.c | 47 ++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 6103aaf..01a0cfe 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -7,8 +7,10 @@
#include <linux/interconnect.h>
#include <linux/ioctl.h>
#include <linux/delay.h>
+#include <linux/devcoredump.h>
#include <linux/list.h>
#include <linux/module.h>
+#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -22,6 +24,48 @@
#include "firmware.h"
#include "pm_helpers.h"
+static int subsystem_dump(struct venus_core *core)
+{
+ struct device_node *node;
+ struct device *dev;
+ struct resource r;
+ void *mem_va;
+ size_t mem_size;
+ void *data;
+ int ret;
+
+ dev = core->dev;
+ node = of_parse_phandle(dev->of_node, "memory-region", 0);
+ if (!node)
+ return -EINVAL;
+
+ ret = of_address_to_resource(node, 0, &r);
+ if (ret)
+ goto err_put_node;
+
+ mem_size = resource_size(&r);
+
+ mem_va = memremap(r.start, mem_size, MEMREMAP_WC);
+ if (!mem_va) {
+ ret = -ENOMEM;
+ goto err_put_node;
+ }
+
+ data = vmalloc(mem_size);
+ if (!data) {
+ ret = -EINVAL;
+ goto err_unmap;
+ }
+
+ memcpy(data, mem_va, mem_size);
+
+ dev_coredumpv(dev, data, mem_size, GFP_KERNEL);
+err_unmap:
+ memunmap(mem_va);
+err_put_node:
+ of_node_put(node);
+ return ret;
+}
static void venus_event_notify(struct venus_core *core, u32 event)
{
struct venus_inst *inst;
@@ -67,6 +111,9 @@ static void venus_sys_error_handler(struct work_struct *work)
venus_shutdown(core);
+ dev_warn(core->dev, "dumping FW region!\n");
+ subsystem_dump(core);
+
pm_runtime_put_sync(core->dev);
while (core->pmdomains[0] && pm_runtime_active(core->pmdomains[0]))
--
2.7.4
