Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20201029172550.3523-1-nsaenzjulienne@suse.de> <20201029172550.3523-4-nsaenzjulienne@suse.de>
In-Reply-To: <20201029172550.3523-4-nsaenzjulienne@suse.de>
From:   Rob Herring <robh+dt@kernel.org>
Date:   Mon, 2 Nov 2020 15:03:42 -0600
Message-ID: <CAL_JsqK17XTkHg1YVeyKmfEL7BO2xGxjUC2WccBEbcY+vOngDA@mail.gmail.com>
Subject: Re: [PATCH v5 3/7] of/address: Introduce of_dma_get_max_cpu_address()
To:     Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Cc:     Catalin Marinas <catalin.marinas@arm.com>,
        Christoph Hellwig <hch@lst.de>,
        Ard Biesheuvel <ardb@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Frank Rowand <frowand.list@gmail.com>,
        Robin Murphy <robin.murphy@arm.com>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        "moderated list:BROADCOM BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@lists.infradead.org>,
        Jeremy Linton <jeremy.linton@arm.com>,
        Linux IOMMU <iommu@lists.linux-foundation.org>,
        devicetree@vger.kernel.org, Will Deacon <will@kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Hanjun Guo <guohanjun@huawei.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Thu, Oct 29, 2020 at 12:26 PM Nicolas Saenz Julienne
<nsaenzjulienne@suse.de> wrote:
>
> Introduce of_dma_get_max_cpu_address(), which provides the highest CPU
> physical address addressable by all DMA masters in the system. It's
> specially useful for setting memory zones sizes at early boot time.
>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
>
> ---
>
> Changes since v4:
>  - Return max address, not address limit (one-off difference)
>
> Changes since v3:
>  - use u64 with cpu_end
>
> Changes since v2:
>  - Use PHYS_ADDR_MAX
>  - return phys_dma_t
>  - Rename function
>  - Correct subject
>  - Add support to start parsing from an arbitrary device node in order
>    for the function to work with unit tests
>
>  drivers/of/address.c | 42 ++++++++++++++++++++++++++++++++++++++++++
>  include/linux/of.h   |  7 +++++++
>  2 files changed, 49 insertions(+)

Reviewed-by: Rob Herring <robh@kernel.org>