Understanding the wireless architecture

Understanding the wireless architecture

[Madhu K]

Hi All,

I am kernel newbie, I wanted to learn linux wireless architecture and
I want to write some wireless drivers. So please suggest me some
tutorials or documents which will help me to understand the linux
wireless device drivers architecture.

Thanks in advance
Madhu
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Re: Understanding the wireless architecture

[Zheng Lv]

On Sat, Oct 07, 2017 at 09:23:04PM +0530, Madhu K wrote:
> I am kernel newbie, I wanted to learn linux wireless architecture and
> I want to write some wireless drivers. So please suggest me some
> tutorials or documents which will help me to understand the linux
> wireless device drivers architecture.

I am also newbie. Although I have no plan to learn wireless
architecture, I do think that Linux kernel (device driver module)
programming is not newbie-friendly.

In my opinion, LDD3 is somehow outdated. Wireless network is not
covered, while there is a full chapter covering parallel port, which is
hard for newbies to learn due to difficulty to buy appropriate hardware.

Moreover, many interfaces are updated. Semaphores have been replaced by
mutexes long ago. There are also advanced .{read|write}_iter functions
in file_operations which can replace {.read|.write}. I cannot understand
the read_iter_zero function in drivers/char/mem.c after I read LDD3.

I wish a better resource for newbies to learn driver programming, maybe
LDD4, maybe a more detailed book elsewhere.

Cheers
Zheng Lv
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Re: Understanding the wireless architecture

[Christos Gkekas]

On 08/10/17 01:20:21 +0800, Zheng Lv wrote:
> On Sat, Oct 07, 2017 at 09:23:04PM +0530, Madhu K wrote:
> > I am kernel newbie, I wanted to learn linux wireless architecture and
> > I want to write some wireless drivers. So please suggest me some
> > tutorials or documents which will help me to understand the linux
> > wireless device drivers architecture.
> 
> I am also newbie. Although I have no plan to learn wireless
> architecture, I do think that Linux kernel (device driver module)
> programming is not newbie-friendly.
> 
> In my opinion, LDD3 is somehow outdated. Wireless network is not
> covered, while there is a full chapter covering parallel port, which is
> hard for newbies to learn due to difficulty to buy appropriate hardware.
> 
> Moreover, many interfaces are updated. Semaphores have been replaced by
> mutexes long ago. There are also advanced .{read|write}_iter functions
> in file_operations which can replace {.read|.write}. I cannot understand
> the read_iter_zero function in drivers/char/mem.c after I read LDD3.
> 
> I wish a better resource for newbies to learn driver programming, maybe
> LDD4, maybe a more detailed book elsewhere.
> 
> Cheers
> Zheng Lv

The kernel is changing at a very rapid pace, so books quickly become out
of date. Perhaps the best source of information would be to check online
for tutorials and documentation. There is also a Documentation directory
in the kernel sources, you can also check there for information.

I did a quick online search and got many results, among which:
https://wireless.wiki.kernel.org/
https://www.linux.com/blog/linux-wireless-Networking-short-walk

Regards,
Chris

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