[v4] venus: core: add support to dump FW region

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

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)

Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/media/platform/qcom/venus/core.c     | 31 ++++++++++++++++++++++++++++
 drivers/media/platform/qcom/venus/core.h     |  2 ++
 drivers/media/platform/qcom/venus/firmware.c |  3 +++
 3 files changed, 36 insertions(+)

On 12/14/20 3:03 PM, Dikshita Agarwal wrote:
> Add support to dump video FW region during FW crash
> using devcoredump helpers.
> 
> 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)

The changes should go to ...

> 
> Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>
> Reviewed-by: Stephen Boyd <swboyd@chromium.org>
> ---

... here

>  drivers/media/platform/qcom/venus/core.c     | 31 ++++++++++++++++++++++++++++
>  drivers/media/platform/qcom/venus/core.h     |  2 ++
>  drivers/media/platform/qcom/venus/firmware.c |  3 +++
>  3 files changed, 36 insertions(+)
> 
> diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
> index bdd293f..2ddbd36 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>

drop this leftover.

>  #include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/slab.h>
> @@ -22,6 +24,33 @@
>  #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 +96,8 @@ 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
> 

With those fixes:

Reviewed-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>