[PATCH 2/4] pci: Extend 'pci regions' command with bus number

[Pali Rohár]

On Tuesday 25 January 2022 16:53:05 Stefan Roese wrote:
> On 1/17/22 16:38, Pali Rohár wrote:
> > 'pci regions' currently prints only region information from bus 0 which
> > belongs to controller 0. Parser for 'pci regions' cmdline currently ignores
> > any additional arguments and so U-Boot always uses bus 0.
> > 
> > Regions are stored in controller (not on the bus) and therefore to retrieve
> > controller from the bus, it is needed to call pci_get_controller() which
> > returns root bus. Because bus 0 is root bus, current code worked fine for
> > controller 0.
> > 
> > Extend cmdline parser for 'pci regions' to allows specifying bus number,
> > extend pci_show_regions() code to accept also non-zero bus number and
> > print bus ranges for which is regions configuration assigned.
> > 
> > Signed-off-by: Pali Rohár <pali at kernel.org>
> 
> Nitpicking comment below. But still:
> 
> Reviewed-by: Stefan Roese <sr at denx.de>
> 
> Thanks,
> Stefan
> 
> > ---
> >   cmd/pci.c | 10 ++++++----
> >   1 file changed, 6 insertions(+), 4 deletions(-)
> > 
> > diff --git a/cmd/pci.c b/cmd/pci.c
> > index 3b1863f139c9..53edf0d90010 100644
> > --- a/cmd/pci.c
> > +++ b/cmd/pci.c
> > @@ -443,7 +443,7 @@ static const struct pci_flag_info {
> >   static void pci_show_regions(struct udevice *bus)
> >   {
> > -	struct pci_controller *hose = dev_get_uclass_priv(bus);
> > +	struct pci_controller *hose = dev_get_uclass_priv(pci_get_controller(bus));
> >   	const struct pci_region *reg;
> >   	int i, j;
> > @@ -452,6 +452,7 @@ static void pci_show_regions(struct udevice *bus)
> >   		return;
> >   	}
> > +	printf("Buses %02x-%02x\n", hose->first_busno, hose->last_busno);
> >   	printf("#   %-18s %-18s %-18s  %s\n", "Bus start", "Phys start", "Size",
> >   	       "Flags");
> >   	for (i = 0, reg = hose->regions; i < hose->region_count; i++, reg++) {
> > @@ -520,8 +521,9 @@ static int do_pci(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> >   				value = 0;
> >   				argc--;
> >   			}
> > -			if (argc > 1)
> > -				busnum = hextoul(argv[1], NULL);
> > +			if (argc > 2 || (argc > 1 && cmd != 'r' && argv[1][0] != 's')) {
> > +				busnum = hextoul(argv[argc - 1], NULL);
> > +			}
> 
> Nitpicking:
> Single line statements without parentheses is preferred.

In next patches I'm adding more statements into this branch and I did
not wanted to make next patches too noisy.

> >   		}
> >   		ret = uclass_get_device_by_seq(UCLASS_PCI, busnum, &bus);
> >   		if (ret) {
> > @@ -586,7 +588,7 @@ static char pci_help_text[] =
> >   	"    - show header of PCI device 'bus.device.function'\n"
> >   	"pci bar b.d.f\n"
> >   	"    - show BARs base and size for device b.d.f'\n"
> > -	"pci regions\n"
> > +	"pci regions [bus]\n"
> >   	"    - show PCI regions\n"
> >   	"pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
> >   	"    - display PCI configuration space (CFG)\n"
> 
> Viele Grüße,
> Stefan Roese
> 
> -- 
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