[igt-dev] [i-g-t 1/5] lib/xe/xe_ioctl: Add a helper to map the buffer

[Das, Nirmoy]

On 3/20/2023 11:00 AM, Bhanuprakash Modem wrote:
> Create a new helper to map the buffer with the user PROT flags.
>
> Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>


Looks good to me.  The series is Acked-by: Nirmoy Das <nirmoy.das at intel.com>


> ---
>   lib/xe/xe_ioctl.c | 14 ++++++++++++--
>   lib/xe/xe_ioctl.h |  1 +
>   2 files changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/lib/xe/xe_ioctl.c b/lib/xe/xe_ioctl.c
> index 9d5793dff..66a8393fe 100644
> --- a/lib/xe/xe_ioctl.c
> +++ b/lib/xe/xe_ioctl.c
> @@ -334,18 +334,28 @@ uint64_t xe_bo_mmap_offset(int fd, uint32_t bo)
>   	return mmo.offset;
>   }
>   
> -void *xe_bo_map(int fd, uint32_t bo, size_t size)
> +static void *__xe_bo_map(int fd, uint16_t bo, size_t size, int prot)
>   {
>   	uint64_t mmo;
>   	void *map;
>   
>   	mmo = xe_bo_mmap_offset(fd, bo);
> -	map = mmap(NULL, size, PROT_WRITE, MAP_SHARED, fd, mmo);
> +	map = mmap(NULL, size, prot, MAP_SHARED, fd, mmo);
>   	igt_assert(map != MAP_FAILED);
>   
>   	return map;
>   }
>   
> +void *xe_bo_map(int fd, uint32_t bo, size_t size)
> +{
> +	return __xe_bo_map(fd, bo, size, PROT_WRITE);
> +}
> +
> +void *xe_bo_mmap_ext(int fd, uint32_t bo, size_t size, int prot)
> +{
> +	return __xe_bo_map(fd, bo, size, prot);
> +}
> +
>   static int __xe_exec(int fd, struct drm_xe_exec *exec)
>   {
>   	int err = 0;
> diff --git a/lib/xe/xe_ioctl.h b/lib/xe/xe_ioctl.h
> index 5c7e773fa..d8c40eda0 100644
> --- a/lib/xe/xe_ioctl.h
> +++ b/lib/xe/xe_ioctl.h
> @@ -73,6 +73,7 @@ uint32_t xe_engine_create_class(int fd, uint32_t vm, uint16_t class);
>   void xe_engine_destroy(int fd, uint32_t engine);
>   uint64_t xe_bo_mmap_offset(int fd, uint32_t bo);
>   void *xe_bo_map(int fd, uint32_t bo, size_t size);
> +void *xe_bo_mmap_ext(int fd, uint32_t bo, size_t size, int prot);
>   void xe_exec(int fd, struct drm_xe_exec *exec);
>   void xe_exec_sync(int fd, uint32_t engine, uint64_t addr,
>   		  struct drm_xe_sync *sync, uint32_t num_syncs);