linux-kernel - Re: [PATCH 06/10] drm/qxl: add qxl_bo_kmap/qxl_bo

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <72d297c4-1a93-aa4f-88c4-721818cfc33b@suse.de>
Date:   Tue, 16 Feb 2021 14:17:24 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Gerd Hoffmann <kraxel@...hat.com>, dri-devel@...ts.freedesktop.org
Cc:     David Airlie <airlied@...ux.ie>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVER FOR QXL VIRTUAL GPU" 
        <virtualization@...ts.linux-foundation.org>,
        "open list:DRM DRIVER FOR QXL VIRTUAL GPU" 
        <spice-devel@...ts.freedesktop.org>,
        Dave Airlie <airlied@...hat.com>
Subject: Re: [PATCH 06/10] drm/qxl: add qxl_bo_kmap/qxl_bo_kunmap

Hi

Am 16.02.21 um 12:37 schrieb Gerd Hoffmann:
> Add kmap/kunmap variants which reserve (and pin) the bo.
> They can be used in case the caller doesn't hold a reservation
> for the bo.

Again, these functions should rather be called vmap/vunamp.

> 
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
> ---
>   drivers/gpu/drm/qxl/qxl_object.h |  2 ++
>   drivers/gpu/drm/qxl/qxl_object.c | 36 ++++++++++++++++++++++++++++++++
>   2 files changed, 38 insertions(+)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
> index 5bd33650183f..360972ae4869 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.h
> +++ b/drivers/gpu/drm/qxl/qxl_object.h
> @@ -64,7 +64,9 @@ extern int qxl_bo_create(struct qxl_device *qdev,
>   			 u32 priority,
>   			 struct qxl_surface *surf,
>   			 struct qxl_bo **bo_ptr);
> +extern int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map);
>   extern int qxl_bo_kmap_locked(struct qxl_bo *bo, struct dma_buf_map *map);
> +extern int qxl_bo_kunmap(struct qxl_bo *bo);
>   extern void qxl_bo_kunmap_locked(struct qxl_bo *bo);
>   void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, int page_offset);
>   void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, void *map);
> diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
> index b56d4dfc28cb..22748b9566af 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.c
> +++ b/drivers/gpu/drm/qxl/qxl_object.c
> @@ -29,6 +29,9 @@
>   #include "qxl_drv.h"
>   #include "qxl_object.h"
>   
> +static int __qxl_bo_pin(struct qxl_bo *bo);
> +static void __qxl_bo_unpin(struct qxl_bo *bo);
> +
>   static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
>   {
>   	struct qxl_bo *bo;
> @@ -179,6 +182,25 @@ int qxl_bo_kmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
>   	return 0;
>   }
>   
> +int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map)
> +{
> +	int r;
> +
> +	r = qxl_bo_reserve(bo);
> +	if (r)
> +		return r;
> +
> +	r = __qxl_bo_pin(bo);
> +	if (r) {
> +		qxl_bo_unreserve(bo);
> +		return r;
> +	}
> +
> +	r = qxl_bo_kmap_locked(bo, map);
> +	qxl_bo_unreserve(bo);
> +	return r;
> +}
> +
>   void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
>   			      struct qxl_bo *bo, int page_offset)
>   {
> @@ -223,6 +245,20 @@ void qxl_bo_kunmap_locked(struct qxl_bo *bo)
>   	ttm_bo_vunmap(&bo->tbo, &bo->map);
>   }
>   
> +int qxl_bo_kunmap(struct qxl_bo *bo)
> +{
> +	int r;
> +
> +	r = qxl_bo_reserve(bo);
> +	if (r)
> +		return r;
> +
> +	qxl_bo_kunmap_locked(bo);
> +	__qxl_bo_unpin(bo);
> +	qxl_bo_unreserve(bo);
> +	return 0;
> +}
> +
>   void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
>   			       struct qxl_bo *bo, void *pmap)
>   {
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer



Download attachment "OpenPGP_signature" of type "application/pgp-signature" (841 bytes)