netdev - Re: [PATCH v2] brcmfmac: expose firmware config files through modinfo

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Date:   Fri, 20 Nov 2020 13:05:29 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     matthias.bgg@...nel.org, Jakub Kicinski <kuba@...nel.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>, hdegoede@...hat.com
Cc:     Pali Rohár <pali@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Chi-Hsien Lin <chi-hsien.lin@...ress.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Chung-Hsien Hsu <stanley.hsu@...ress.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Double Lo <double.lo@...ress.com>,
        Frank Kao <frank.kao@...ress.com>,
        linux-wireless@...r.kernel.org,
        brcm80211-dev-list.pdl@...adcom.com,
        Arend van Spriel <arend.vanspriel@...adcom.com>,
        "Gustavo A . R . Silva" <gustavo@...eddedor.com>,
        netdev@...r.kernel.org,
        Rafał Miłecki <rafal@...ecki.pl>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Wright Feng <wright.feng@...ress.com>,
        Matthias Brugger <mbrugger@...e.com>,
        Saravanan Shanmugham <saravanan.shanmugham@...ress.com>,
        brcm80211-dev-list@...ress.com, linux-kernel@...r.kernel.org,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Amar Shankar <amsr@...ress.com>
Subject: Re: [PATCH v2] brcmfmac: expose firmware config files through modinfo

20.11.2020 12:52, matthias.bgg@...nel.org пишет:
> From: Matthias Brugger <mbrugger@...e.com>
> 
> Apart from a firmware binary the chip needs a config file used by the
> FW. Add the config files to modinfo so that they can be read by
> userspace.
> 
> Signed-off-by: Matthias Brugger <mbrugger@...e.com>
> 
> ---
> 
> Changes in v2:
> In comparison to first version [0] we use wildcards to enumerate the
> firmware configuration files. Wildcard support was added to dracut
> recently [1].
> [0] https://lore.kernel.org/linux-wireless/20200701153123.25602-1-matthias.bgg@kernel.org/
> [1] https://github.com/dracutdevs/dracut/pull/860
> 
>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> index 99987a789e7e..dd6d287b1b00 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
> @@ -625,6 +625,15 @@ BRCMF_FW_DEF(4359, "brcmfmac4359-sdio");
>  BRCMF_FW_DEF(4373, "brcmfmac4373-sdio");
>  BRCMF_FW_DEF(43012, "brcmfmac43012-sdio");
>  
> +/* firmware config files */
> +MODULE_FIRMWARE(BRCMF_FW_DEFAULT_PATH "brcm/brcmfmac4330-sdio.*.txt");
> +MODULE_FIRMWARE(BRCMF_FW_DEFAULT_PATH "brcm/brcmfmac43340-sdio.*.txt");
> +MODULE_FIRMWARE(BRCMF_FW_DEFAULT_PATH "brcm/brcmfmac43362-sdio.*.txt");
> +MODULE_FIRMWARE(BRCMF_FW_DEFAULT_PATH "brcm/brcmfmac43430a0-sdio.*.txt");
> +MODULE_FIRMWARE(BRCMF_FW_DEFAULT_PATH "brcm/brcmfmac43430-sdio.*.txt");
> +MODULE_FIRMWARE(BRCMF_FW_DEFAULT_PATH "brcm/brcmfmac43455-sdio.*.txt");
> +MODULE_FIRMWARE(BRCMF_FW_DEFAULT_PATH "brcm/brcmfmac4356-pcie.*.txt");

This doesn't cover all hardware models. Note that the upstream
linux-firmware has files only for a few hardware models.

I suppose that the correct mask should be "brcm/brcmfmac*-sdio.*.txt".