Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Fri, 21 Apr 2023 12:46:22 +0200
From:   Boris Brezillon <boris.brezillon@collabora.com>
To:     Danilo Krummrich <dakr@redhat.com>
Cc:     airlied@gmail.com, daniel@ffwll.ch, tzimmermann@suse.de,
        mripard@kernel.org, corbet@lwn.net, christian.koenig@amd.com,
        bskeggs@redhat.com, Liam.Howlett@oracle.com,
        matthew.brost@intel.com, alexdeucher@gmail.com, ogabbay@kernel.org,
        bagasdotme@gmail.com, willy@infradead.org, jason@jlekstrand.net,
        dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org,
        linux-doc@vger.kernel.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Dave Airlie <airlied@redhat.com>,
        donald.robson@imgtec.com
Subject: Re: [PATCH drm-next v3 04/15] drm: manager to keep track of GPUs VA
 mappings
Message-ID: <20230421124622.6386cd60@collabora.com>
In-Reply-To: <20230404012741.116502-5-dakr@redhat.com>
References: <20230404012741.116502-1-dakr@redhat.com>
        <20230404012741.116502-5-dakr@redhat.com>
Organization: Collabora
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Precedence: bulk

On Tue,  4 Apr 2023 03:27:30 +0200
Danilo Krummrich <dakr@redhat.com> wrote:

> +/**
> + * drm_gpuva_prealloc_create - creates a preallocated node to store a
> + * &drm_gpuva entry.
> + *
> + * Returns: the &drm_gpuva_prealloc object on success, NULL on failure
> + */
> +struct drm_gpuva_prealloc *
> +drm_gpuva_prealloc_create(void)
> +{
> +	struct drm_gpuva_prealloc *pa;
> +
> +	pa = kzalloc(sizeof(*pa), GFP_KERNEL);
> +	if (!pa)
> +		return NULL;
> +
> +	if (mas_preallocate(&pa->mas, GFP_KERNEL)) {

mas_preallocate() needs a valid tree field to calculate the number
of nodes to pre-allocate. I guess we're missing a MA_STATE_INIT() here,
and we need to pass a gpuva_mgr object to this helper.

> +		kfree(pa);
> +		return NULL;
> +	}
> +
> +	return pa;
> +}
> +EXPORT_SYMBOL(drm_gpuva_prealloc_create);