From: Marek Vasut <marex@denx.de>
To: Lukas Wunner <lukas@wunner.de>
Cc: netdev@vger.kernel.org, "David S . Miller" <davem@davemloft.net>,
Petr Stetiar <ynezz@true.cz>, YueHaibing <yuehaibing@huawei.com>,
Andrew Lunn <andrew@lunn.ch>
Subject: Re: [PATCH 11/14] net: ks8851: Implement register and FIFO accessor callbacks
Date: Sun, 29 Mar 2020 16:22:54 +0200 [thread overview]
Message-ID: <6aa83a56-e182-aa56-cdb8-d6fdcefd2b5c@denx.de> (raw)
In-Reply-To: <20200324134555.wgtvj4owmkw3jup4@wunner.de>
On 3/24/20 2:45 PM, Lukas Wunner wrote:
> On Tue, Mar 24, 2020 at 12:43:00AM +0100, Marek Vasut wrote:
>> The register and FIFO accessors are bus specific. Implement callbacks so
>> that each variant of the KS8851 can implement matching accessors and use
>> the rest of the common code.
> [...]
>> + unsigned int (*rdreg16)(struct ks8851_net *ks,
>> + unsigned int reg);
>> + void (*wrreg16)(struct ks8851_net *ks,
>> + unsigned int reg, unsigned int val);
>> + void (*rdfifo)(struct ks8851_net *ks, u8 *buff,
>> + unsigned int len);
>> + void (*wrfifo)(struct ks8851_net *ks,
>> + struct sk_buff *txp, bool irq);
>
> Using callbacks entails a dereference for each invocation.
>
> A cheaper approach is to just declare the function signatures
> in ks8851.h and provide non-static implementations in
> ks8851_spi.c and ks8851_mll.c, so I'd strongly prefer that.
>
> Even better, since this only concerns the register accessors
> (which are inlined anyway by the compiler), it would be best
> to have them in header files (e.g. ks8851_spi.h / ks8851_par.h)
> which are included by the common ks8851.c based on the target
> which is being compiled. That involves a bit of kbuild magic
> though to generate two different .o from the same .c file,
> each with specific "-include ..." CFLAGS.
Seems this also fails when both options are compiled in, then there is a
symbol name collision. Thoughts ?
next prev parent reply other threads:[~2020-03-29 14:23 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-23 23:42 [PATCH 00/14] net: ks8851: Unify KS8851 SPI and MLL drivers Marek Vasut
2020-03-23 23:42 ` [PATCH 01/14] net: ks8851: Factor out spi->dev in probe()/remove() Marek Vasut
2020-03-24 1:15 ` Andrew Lunn
2020-03-24 6:46 ` Lukas Wunner
2020-03-23 23:42 ` [PATCH 02/14] net: ks8851: Replace dev_err() with netdev_err() in IRQ handler Marek Vasut
2020-03-24 1:16 ` Andrew Lunn
2020-03-23 23:42 ` [PATCH 03/14] net: ks8851: Pass device pointer into ks8851_init_mac() Marek Vasut
2020-03-24 1:06 ` Andrew Lunn
2020-03-24 7:08 ` Lukas Wunner
2020-03-23 23:42 ` [PATCH 04/14] net: ks8851: Use devm_alloc_etherdev() Marek Vasut
2020-03-24 1:19 ` Andrew Lunn
2020-03-23 23:42 ` [PATCH 05/14] net: ks8851: Use dev_{get,set}_drvdata() Marek Vasut
2020-03-24 1:22 ` Andrew Lunn
2020-03-23 23:42 ` [PATCH 06/14] net: ks8851: Remove ks8851_rdreg32() Marek Vasut
2020-03-24 1:30 ` Andrew Lunn
2020-03-24 12:34 ` Marek Vasut
2020-03-24 7:22 ` Lukas Wunner
2020-03-24 12:37 ` Marek Vasut
2020-03-23 23:42 ` [PATCH 07/14] net: ks8851: Use 16-bit writes to program MAC address Marek Vasut
2020-03-24 1:40 ` Andrew Lunn
2020-03-24 7:17 ` Michal Kubecek
2020-03-24 8:13 ` Lukas Wunner
2020-03-24 12:25 ` Andrew Lunn
2020-03-24 12:36 ` Lukas Wunner
2020-03-24 13:09 ` Marek Vasut
2020-03-24 13:31 ` Marek Vasut
2020-03-24 14:47 ` Lukas Wunner
2020-03-24 14:53 ` Marek Vasut
2020-03-23 23:42 ` [PATCH 08/14] net: ks8851: Use 16-bit read of RXFC register Marek Vasut
2020-03-24 1:50 ` Andrew Lunn
2020-03-24 12:50 ` Marek Vasut
2020-03-24 13:32 ` Andrew Lunn
2020-03-24 10:41 ` Lukas Wunner
2020-03-24 12:42 ` Marek Vasut
2020-03-23 23:42 ` [PATCH 09/14] net: ks8851: Split out SPI specific entries in struct ks8851_net Marek Vasut
2020-03-24 1:55 ` Andrew Lunn
2020-03-24 10:49 ` Lukas Wunner
2020-03-24 12:27 ` Andrew Lunn
2020-03-23 23:42 ` [PATCH 10/14] net: ks8851: Split out SPI specific code from probe() and remove() Marek Vasut
2020-03-24 1:58 ` Andrew Lunn
2020-03-23 23:43 ` [PATCH 11/14] net: ks8851: Implement register and FIFO accessor callbacks Marek Vasut
2020-03-24 13:45 ` Lukas Wunner
2020-03-24 14:10 ` Marek Vasut
2020-03-24 14:29 ` Lukas Wunner
2020-03-24 14:44 ` Marek Vasut
2020-03-29 14:22 ` Marek Vasut [this message]
2020-03-23 23:43 ` [PATCH 12/14] net: ks8851: Separate SPI operations into separate file Marek Vasut
2020-03-23 23:43 ` [PATCH 13/14] net: ks8851: Implement Parallel bus operations Marek Vasut
2020-03-24 8:16 ` kbuild test robot
2020-03-23 23:43 ` [PATCH 14/14] net: ks8851: Remove ks8851_mll.c Marek Vasut
2020-03-24 14:08 ` Lukas Wunner
2020-03-24 14:12 ` Marek Vasut
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6aa83a56-e182-aa56-cdb8-d6fdcefd2b5c@denx.de \
--to=marex@denx.de \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=lukas@wunner.de \
--cc=netdev@vger.kernel.org \
--cc=ynezz@true.cz \
--cc=yuehaibing@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).