2020-12-15 18:14:08

by Dikshita Agarwal

Subject: [PATCH v5] venus: core: add support to dump FW region

Add support to dump video FW region during FW crash
using devcoredump helpers.

Signed-off-by: Dikshita Agarwal <[email protected]>
Reviewed-by: Stephen Boyd <[email protected]>
Reviewed-by: Stanimir Varbanov <[email protected]>

Major changes since v1:
- update the name of function (Stephen)
- store start address and size in resource structure during
probe and reuse while dumping (Stephen, Stanimir)
---
drivers/media/platform/qcom/venus/core.c | 30 ++++++++++++++++++++++++++++
drivers/media/platform/qcom/venus/core.h | 2 ++
drivers/media/platform/qcom/venus/firmware.c | 3 +++
3 files changed, 35 insertions(+)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index bdd293f..1cc57ee 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -7,6 +7,7 @@
#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_device.h>
@@ -22,6 +23,33 @@
#include "firmware.h"
#include "pm_helpers.h"

+static void venus_coredump(struct venus_core *core)
+{
+ struct device *dev;
+ phys_addr_t mem_phys;
+ size_t mem_size;
+ void *mem_va;
+ void *data;
+
+ dev = core->dev;
+ mem_phys = core->fw.mem_phys;
+ mem_size = core->fw.mem_size;
+
+ mem_va = memremap(mem_phys, mem_size, MEMREMAP_WC);
+ if (!mem_va)
+ return;
+
+ data = vmalloc(mem_size);
+ if (!data) {
+ memunmap(mem_va);
+ return;
+ }
+
+ memcpy(data, mem_va, mem_size);
+ memunmap(mem_va);
+ dev_coredumpv(dev, data, mem_size, GFP_KERNEL);
+}
+
static void venus_event_notify(struct venus_core *core, u32 event)
{
struct venus_inst *inst;
@@ -67,6 +95,8 @@ static void venus_sys_error_handler(struct work_struct *work)

venus_shutdown(core);

+ venus_coredump(core);
+
pm_runtime_put_sync(core->dev);

while (core->pmdomains[0] && pm_runtime_active(core->pmdomains[0]))
diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 3a477fc..b37de95 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -178,6 +178,8 @@ struct venus_core {
struct device *dev;
struct iommu_domain *iommu_domain;
size_t mapped_mem_size;
+ phys_addr_t mem_phys;
+ size_t mem_size;
} fw;
struct mutex lock;
struct list_head instances;
diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index d03e2dd..89defc2 100644
--- a/drivers/media/platform/qcom/venus/firmware.c
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -201,6 +201,9 @@ int venus_boot(struct venus_core *core)
return -EINVAL;
}

+ core->fw.mem_size = mem_size;
+ core->fw.mem_phys = mem_phys;
+
if (core->use_tz)
ret = qcom_scm_pas_auth_and_reset(VENUS_PAS_ID);
else
--
2.7.4

2021-01-20 07:59:42

by Stephen Boyd

Subject: Re: [PATCH v5] venus: core: add support to dump FW region

Quoting Dikshita Agarwal (2020-12-15 10:08:36)
> Add support to dump video FW region during FW crash
> using devcoredump helpers.
>
> Signed-off-by: Dikshita Agarwal <[email protected]>
> Reviewed-by: Stephen Boyd <[email protected]>
> Reviewed-by: Stanimir Varbanov <[email protected]>
>
> Major changes since v1:
> - update the name of function (Stephen)
> - store start address and size in resource structure during
> probe and reuse while dumping (Stephen, Stanimir)
> ---

Can this be picked up for the next merge window?