linux-kernel - Re: [PATCH 9/9] accel/rocket: Add IOCTLs for synchronizing memory accesses

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Message-ID: <7e32d69f-7024-01d8-a165-fc00ea60fa90@quicinc.com>
Date: Fri, 14 Jun 2024 10:39:43 -0600
From: Jeffrey Hugo <quic_jhugo@...cinc.com>
To: Tomeu Vizoso <tomeu@...euvizoso.net>, Joerg Roedel <joro@...tes.org>,
        Will
 Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Heiko Stuebner
	<heiko@...ech.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Oded Gabbay
	<ogabbay@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...euvizoso.net>,
        David
 Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Maarten
 Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard
	<mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Philipp Zabel
	<p.zabel@...gutronix.de>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>
CC: <iommu@...ts.linux.dev>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-rockchip@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <linux-media@...r.kernel.org>, <linaro-mm-sig@...ts.linaro.org>
Subject: Re: [PATCH 9/9] accel/rocket: Add IOCTLs for synchronizing memory
 accesses

On 6/12/2024 7:53 AM, Tomeu Vizoso wrote:
> diff --git a/include/uapi/drm/rocket_accel.h b/include/uapi/drm/rocket_accel.h
> index 888c9413e4cd..1539af0af4fe 100644
> --- a/include/uapi/drm/rocket_accel.h
> +++ b/include/uapi/drm/rocket_accel.h
> @@ -12,9 +12,13 @@ extern "C" {
>   #endif
>   
>   #define DRM_ROCKET_CREATE_BO			0x00
> -#define DRM_ROCKET_SUBMIT			0x01
> +#define DRM_ROCKET_PREP_BO			0x01
> +#define DRM_ROCKET_FINI_BO			0x02
> +#define DRM_ROCKET_SUBMIT			0x03

This looks like a uAPI breaking change.  Shouldn't you have defined 
SUBMIT as 0x03 from the beginning, or put the new BO ioctls after it?