linux-kernel - Re: [PATCH v3 4/8] of: unittest: Add test for of_dma_get_max_cpu

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Date:   Wed, 14 Oct 2020 17:04:30 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Christoph Hellwig <hch@....de>,
        Ard Biesheuvel <ardb@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Robin Murphy <robin.murphy@....com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:BROADCOM BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@...ts.infradead.org>,
        Jeremy Linton <jeremy.linton@....com>,
        Linux IOMMU <iommu@...ts.linux-foundation.org>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 4/8] of: unittest: Add test for of_dma_get_max_cpu_address()

On Wed, Oct 14, 2020 at 2:12 PM Nicolas Saenz Julienne
<nsaenzjulienne@...e.de> wrote:
>
> Introduce a test for of_dma_get_max_cup_address(), it uses the same DT
> data as the rest of dma-ranges unit tests.
>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> ---
>  drivers/of/unittest.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
> index 06cc988faf78..2cbf2a585c9f 100644
> --- a/drivers/of/unittest.c
> +++ b/drivers/of/unittest.c
> @@ -869,6 +869,25 @@ static void __init of_unittest_changeset(void)
>  #endif
>  }
>
> +static void __init of_unittest_dma_get_max_cpu_address(void)
> +{
> +#ifdef CONFIG_HAS_DMA

Can't the unittest run without this? I run the unittests under UML.

> +       struct device_node *np;
> +       phys_addr_t cpu_addr;
> +
> +       np = of_find_node_by_path("/testcase-data/address-tests");
> +       if (!np) {
> +               pr_err("missing testcase data\n");
> +               return;
> +       }
> +
> +       cpu_addr = of_dma_get_max_cpu_address(np);
> +       unittest(cpu_addr == 0x50000000ULL,
> +                "of_dma_get_max_cpu_address: wrong CPU addr %pad (expecting %llx)\n",
> +                &cpu_addr, 0x50000000ULL);
> +#endif
> +}
> +
>  static void __init of_unittest_dma_ranges_one(const char *path,
>                 u64 expect_dma_addr, u64 expect_paddr)
>  {
> @@ -3266,6 +3285,7 @@ static int __init of_unittest(void)
>         of_unittest_changeset();
>         of_unittest_parse_interrupts();
>         of_unittest_parse_interrupts_extended();
> +       of_unittest_dma_get_max_cpu_address();
>         of_unittest_parse_dma_ranges();
>         of_unittest_pci_dma_ranges();
>         of_unittest_match_node();
> --
> 2.28.0
>