[U-Boot] [U-Boot, v6, 2/2] common: Generic firmware loader for file system

[Chee, Tien Fong <tien.fong.chee@intel.com>]

On Thu, 2018-01-18 at 08:18 -0500, Tom Rini wrote:
> On Thu, Jan 18, 2018 at 03:42:14AM +0000, Chee, Tien Fong wrote:
> > 
> > On Tue, 2018-01-16 at 09:35 -0500, Tom Rini wrote:
> > > 
> > > On Tue, Jan 16, 2018 at 07:58:00AM +0000, Chee, Tien Fong wrote:
> > > > 
> > > > 
> > > > On Mon, 2018-01-15 at 11:36 -0500, Tom Rini wrote:
> > > > > 
> > > > > 
> > > > > On Wed, Dec 27, 2017 at 01:04:38PM +0800, tien.fong.chee at inte
> > > > > l.co
> > > > > m
> > > > > wrote:
> > > > > 
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > From: Tien Fong Chee <tien.fong.chee@intel.com>
> > > > > > 
> > > > > > This is file system generic loader which can be used to
> > > > > > load
> > > > > > the file image from the storage into target such as memory.
> > > > > > The consumer driver would then use this loader to program
> > > > > > whatever,
> > > > > > ie. the FPGA device.
> > > > > > 
> > > > > > Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
> > > > > Please add Lothar's Reviewed-by for v7.  There's a number of
> > > > > minor
> > > > > checkpatch.pl issues that checkpatch.pl can in turn fixup
> > > > > itself,
> > > > > please
> > > > > correct them.
> > > > > 
> > > > I have ran the checkpatch.pl on this patch, i didn't see any
> > > > error.
> > > When I ran it, it was pointing out cases where you have:
> > > if (foo->bar != NULL)
> > > when you can just use:
> > > if (foo->bar)
> > > 
> > It's weird for checkpatch.pl not showing the same. I would fix the
> > code
> > with above example.
> That is odd.  Are you running it from within the U-Boot tree?
> 
Yes.
> > 
> > > 
> > > [snip]
> > > > 
> > > > 
> > > > > 
> > > > > 
> > > > > > 
> > > > > > 
> > > > > > diff --git a/common/fs_loader.c b/common/fs_loader.c
> > > > > > new file mode 100644
> > > > > > index 0000000..56d29b6
> > > > > > --- /dev/null
> > > > > > +++ b/common/fs_loader.c
> > > > > > @@ -0,0 +1,309 @@
> > > > > > +/*
> > > > > > + * Copyright (C) 2017 Intel Corporation <www.intel.com>
> > > > > > + *
> > > > > > + * SPDX-License-Identifier:    GPL-2.0
> > > > > > + */
> > > > > > +
> > > > > > +#include <common.h>
> > > > > > +#include <errno.h>
> > > > > > +#include <fs.h>
> > > > > > +#include <fs_loader.h>
> > > > > > +#include <nand.h>
> > > > > > +#include <sata.h>
> > > > > > +#include <spi.h>
> > > > > > +#include <spi_flash.h>
> > > > > > +#include <spl.h>
> > > > > This wants <asm/spl.h> which is not globally available, so
> > > > > you
> > > > > need
> > > > > to
> > > > > come up with something here.  At least making this Kconfig-
> > > > > enabled
> > > > > will
> > > > > be a start and perhaps OK for now.
> > > > > 
> > > > I can enable the Kconfig, and put the caution about dependency
> > > > on
> > > > <asm/spl.h> in document.
> > > Well, you need to make that part of the code depend on CONFIG_SPL
> > > as
> > > SPL
> > > support requires <asm/spl.h> to exist.   Perhaps part of the code
> > > needs
> > > to be refactored to more easily deal with SPL not always being
> > > present?
> > > 
> > How about i just move the whole enum { } from line 17 to line 35 in
> > asm/spl.h to fs.h, and then enum{} above replaced with #include
> > <fs.h>?
> > 
> > asm/spl.h
> > ----------
> > #if defined(CONFIG_ARCH_OMAP2PLUS) \
> > 	|| defined(CONFIG_EXYNOS4) || defined(CONFIG_EXYNOS5) \
> > 	|| defined(CONFIG_EXYNOS4210)
> > /* Platform-specific defines */
> > #include <asm/arch/spl.h>
> > 
> > #else
> > #include <fs.h>  <-- replacement
> > #endif
> > [...]
> No, because that's still arch specific code and will blow up some
> platforms that do not have asm/spl.h at all and is still non-portable
> (look at the various asm/spl.h files that do exist for how
> BOOT_DEVICE_xxx is handled in different places).
> 
Ok, you are right.
> It's OK to restructure your code to have:
> #ifdef CONFIG_SPL
> #include <spl.h>
> ... SPL specific functions
> #endif
> 
Okay, noted.