linux-kernel - Re: [PATCH v4 1/5] usb: host: export symbols for xhci-exynos to use xhci hooks

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Message-ID: <20220426102709.GA175152@ubuntu>
Date:   Tue, 26 Apr 2022 19:27:09 +0900
From:   Jung Daehwan <dh10.jung@...sung.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Mathias Nyman <mathias.nyman@...el.com>,
        "open list:USB XHCI DRIVER" <linux-usb@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Howard Yen <howardyen@...gle.com>,
        Jack Pham <jackp@...eaurora.org>,
        Puma Hsu <pumahsu@...gle.com>,
        "J . Avila" <elavila@...gle.com>, sc.suh@...sung.com,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Subject: Re: [PATCH v4 1/5] usb: host: export symbols for xhci-exynos to use
 xhci hooks

On Tue, Apr 26, 2022 at 11:54:16AM +0200, Greg Kroah-Hartman wrote:
> On Tue, Apr 26, 2022 at 06:18:44PM +0900, Daehwan Jung wrote:
> > Export symbols for xhci hooks usage:
> >     xhci_get_slot_ctx
> >     xhci_get_endpoint_address
> >     - Allow xhci hook to get ep_ctx from the xhci_container_ctx for
> >       getting the ep_ctx information to know which ep is offloading and
> >       comparing the context in remote subsystem memory if needed.
> > 
> >     xhci_ring_alloc
> >     - Allow xhci hook to allocate vendor specific ring. Vendors could
> >       alloc additional event ring.
> > 
> >     xhci_trb_virt_to_dma
> >     - Used to retrieve the DMA address of vendor specific ring. Vendors
> >       could get dequeue address of event ring.
> > 
> >     xhci_segment_free
> >     xhci_link_segments
> >     - Allow xhci hook to handle vendor specific segment. Vendors could
> >       directly free or link segments of vendor specific ring.
> > 
> >     xhci_initialize_ring_info
> >     - Allow xhci hook to initialize vendor specific ring.
> > 
> >     xhci_check_trb_in_td_math
> >     - Allow xhci hook to Check TRB math for validation. Vendors could
> >       check trb when allocating vendor specific ring.
> > 
> >     xhci_address_device
> >     - Allow override to give configuration info to Co-processor.
> > 
> >     xhci_bus_suspend
> >     xhci_bus_resume
> >     - Allow override of suspend and resume for power scenario.
> > 
> >     xhci_remove_stream_mapping
> >     - Allow to xhci hook to remove stream mapping. Vendors need to do it
> >       when free-ing vendor specific ring if it's stream type.
> > 
> 
> For the static functions that you are now exporting, they need to have
> their functions declared in a .h file.  If not, you now get warnings
> when you run sparse after applying this commit, right?
> 
> thanks,
> 
> greg k-h
> 

I didn't get warnings in my environment. I tested to build default config +
xhci_exynos by make command. Is there compile option to check it?

Best Regards,
Jung Daehwan