[PATCH] drm/exynos: add DRM_EXYNOS_GEM_MAP ioctl

[Joonyoung Shim]

On 10/13/2015 02:11 PM, Inki Dae wrote:
> 
> Merged.
> 

Thanks for merge but this will be conflicted with the patch of Daniel,
http://patchwork.freedesktop.org/patch/60565/

I found it on next-20151012, do you want v2 patch that DRM_UNLOCKED flag
is dropped?

Thanks.

> Thanks,
> Inki Dae
> 
> 2015년 10월 05일 12:04에 Joonyoung Shim 이(가) 쓴 글:
>> The commit d931589c01a2 ("drm/exynos: remove DRM_EXYNOS_GEM_MAP_OFFSET
>> ioctl") removed it same with the ioctl that this patch adds. The reason
>> that removed DRM_EXYNOS_GEM_MAP_OFFSET was we could use
>> DRM_IOCTL_MODE_MAP_DUMB. Both did exactly same thing.
>>
>> Now we again will revive it as DRM_EXYNOS_GEM_MAP because of render
>> node. DRM_IOCTL_MODE_MAP_DUMB isn't permitted in render node.
>>
>> Signed-off-by: Joonyoung Shim <jy0922.shim at samsung.com>
>> ---
>>   drivers/gpu/drm/exynos/exynos_drm_drv.c |  2 ++
>>   drivers/gpu/drm/exynos/exynos_drm_gem.c |  9 +++++++++
>>   drivers/gpu/drm/exynos/exynos_drm_gem.h |  4 ++++
>>   include/uapi/drm/exynos_drm.h           | 17 ++++++++++++++++-
>>   4 files changed, 31 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
>> index f0a5839..8fd7201 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
>> @@ -404,6 +404,8 @@ static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
>>   static const struct drm_ioctl_desc exynos_ioctls[] = {
>>       DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
>>               DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
>> +    DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
>> +            DRM_UNLOCKED | DRM_AUTH | DRM_RENDER_ALLOW),
>>       DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
>>               DRM_UNLOCKED | DRM_RENDER_ALLOW),
>>       DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
>> index f1dcdd0..29f4875 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
>> @@ -271,6 +271,15 @@ int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
>>       return 0;
>>   }
>>
>> +int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data,
>> +                 struct drm_file *file_priv)
>> +{
>> +    struct drm_exynos_gem_map *args = data;
>> +
>> +    return exynos_drm_gem_dumb_map_offset(file_priv, dev, args->handle,
>> +                          &args->offset);
>> +}
>> +
>>   dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
>>                       unsigned int gem_handle,
>>                       struct drm_file *filp)
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
>> index 37ab8b2..0d0ab27 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
>> @@ -73,6 +73,10 @@ struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev,
>>   int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
>>                   struct drm_file *file_priv);
>>
>> +/* get fake-offset of gem object that can be used with mmap. */
>> +int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data,
>> +                 struct drm_file *file_priv);
>> +
>>   /*
>>    * get dma address from gem handle and this function could be used for
>>    * other drivers such as 2d/3d acceleration drivers.
>> diff --git a/include/uapi/drm/exynos_drm.h b/include/uapi/drm/exynos_drm.h
>> index 5575ed1..18f0601 100644
>> --- a/include/uapi/drm/exynos_drm.h
>> +++ b/include/uapi/drm/exynos_drm.h
>> @@ -33,6 +33,19 @@ struct drm_exynos_gem_create {
>>   };
>>
>>   /**
>> + * A structure for getting a fake-offset that can be used with mmap.
>> + *
>> + * @handle: handle of gem object.
>> + * @reserved: just padding to be 64-bit aligned.
>> + * @offset: a fake-offset of gem object.
>> + */
>> +struct drm_exynos_gem_map {
>> +    __u32 handle;
>> +    __u32 reserved;
>> +    __u64 offset;
>> +};
>> +
>> +/**
>>    * A structure to gem information.
>>    *
>>    * @handle: a handle to gem object created.
>> @@ -284,6 +297,7 @@ struct drm_exynos_ipp_cmd_ctrl {
>>   };
>>
>>   #define DRM_EXYNOS_GEM_CREATE        0x00
>> +#define DRM_EXYNOS_GEM_MAP        0x01
>>   /* Reserved 0x03 ~ 0x05 for exynos specific gem ioctl */
>>   #define DRM_EXYNOS_GEM_GET        0x04
>>   #define DRM_EXYNOS_VIDI_CONNECTION    0x07
>> @@ -301,7 +315,8 @@ struct drm_exynos_ipp_cmd_ctrl {
>>
>>   #define DRM_IOCTL_EXYNOS_GEM_CREATE        DRM_IOWR(DRM_COMMAND_BASE + \
>>           DRM_EXYNOS_GEM_CREATE, struct drm_exynos_gem_create)
>> -
>> +#define DRM_IOCTL_EXYNOS_GEM_MAP        DRM_IOWR(DRM_COMMAND_BASE + \
>> +        DRM_EXYNOS_GEM_MAP, struct drm_exynos_gem_map)
>>   #define DRM_IOCTL_EXYNOS_GEM_GET    DRM_IOWR(DRM_COMMAND_BASE + \
>>           DRM_EXYNOS_GEM_GET,    struct drm_exynos_gem_info)
>>
>>
>