Re: [PATCH] hw/pci-host: Use register definitions from PCI standard

[BALATON Zoltan <balaton@eik.bme.hu>]

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On Thu, 5 Jan 2023, Philippe Mathieu-Daudé wrote:
> No need to document magic values when the definition names
> from "standard-headers/linux/pci_regs.h" are self-explicit.
>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
> hw/pci-host/grackle.c  |  2 +-
> hw/pci-host/raven.c    |  6 +++---
> hw/pci-host/uninorth.c | 30 +++++++++++-------------------
> 3 files changed, 15 insertions(+), 23 deletions(-)
>
> diff --git a/hw/pci-host/grackle.c b/hw/pci-host/grackle.c
> index 95945ac0f4..2a45cc13c3 100644
> --- a/hw/pci-host/grackle.c
> +++ b/hw/pci-host/grackle.c
> @@ -91,7 +91,7 @@ static void grackle_init(Object *obj)
>
> static void grackle_pci_realize(PCIDevice *d, Error **errp)
> {
> -    d->config[0x09] = 0x01;
> +    d->config[PCI_CLASS_PROG] = 0x01;
> }
>
> static void grackle_pci_class_init(ObjectClass *klass, void *data)
> diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
> index 7a105e4a63..c47259a851 100644
> --- a/hw/pci-host/raven.c
> +++ b/hw/pci-host/raven.c
> @@ -329,9 +329,9 @@ static void raven_realize(PCIDevice *d, Error **errp)
>     char *filename;
>     int bios_size = -1;
>
> -    d->config[0x0C] = 0x08; // cache_line_size
> -    d->config[0x0D] = 0x10; // latency_timer
> -    d->config[0x34] = 0x00; // capabilities_pointer
> +    d->config[PCI_CACHE_LINE_SIZE] = 0x08;
> +    d->config[PCI_LATENCY_TIMER] = 0x10;
> +    d->config[PCI_CAPABILITY_LIST] = 0x00;
>
>     memory_region_init_rom_nomigrate(&s->bios, OBJECT(s), "bios", BIOS_SIZE,
>                                      &error_fatal);
> diff --git a/hw/pci-host/uninorth.c b/hw/pci-host/uninorth.c
> index 8396c91d59..342baff12a 100644
> --- a/hw/pci-host/uninorth.c
> +++ b/hw/pci-host/uninorth.c
> @@ -277,11 +277,11 @@ static void pci_unin_internal_init(Object *obj)
> static void unin_main_pci_host_realize(PCIDevice *d, Error **errp)
> {
>     /* cache_line_size */
> -    d->config[0x0C] = 0x08;
> +    d->config[PCI_CACHE_LINE_SIZE] = 0x08;
>     /* latency_timer */
> -    d->config[0x0D] = 0x10;
> +    d->config[PCI_LATENCY_TIMER] = 0x10;
>     /* capabilities_pointer */
> -    d->config[0x34] = 0x00;
> +    d->config[PCI_CAPABILITY_LIST] = 0x00;

Did you mean to remove the comments here as well?

Regards,
BALATON Zoltan

>     /*
>      * Set kMacRISCPCIAddressSelect (0x48) register to indicate PCI
> @@ -296,30 +296,22 @@ static void unin_main_pci_host_realize(PCIDevice *d, Error **errp)
>
> static void unin_agp_pci_host_realize(PCIDevice *d, Error **errp)
> {
> -    /* cache_line_size */
> -    d->config[0x0C] = 0x08;
> -    /* latency_timer */
> -    d->config[0x0D] = 0x10;
> -    /* capabilities_pointer
> -    d->config[0x34] = 0x80; */
> +    d->config[PCI_CACHE_LINE_SIZE] = 0x08;
> +    d->config[PCI_LATENCY_TIMER] = 0x10;
> +    /* d->config[PCI_CAPABILITY_LIST] = 0x80; */
> }
>
> static void u3_agp_pci_host_realize(PCIDevice *d, Error **errp)
> {
> -    /* cache line size */
> -    d->config[0x0C] = 0x08;
> -    /* latency timer */
> -    d->config[0x0D] = 0x10;
> +    d->config[PCI_CACHE_LINE_SIZE] = 0x08;
> +    d->config[PCI_LATENCY_TIMER] = 0x10;
> }
>
> static void unin_internal_pci_host_realize(PCIDevice *d, Error **errp)
> {
> -    /* cache_line_size */
> -    d->config[0x0C] = 0x08;
> -    /* latency_timer */
> -    d->config[0x0D] = 0x10;
> -    /* capabilities_pointer */
> -    d->config[0x34] = 0x00;
> +    d->config[PCI_CACHE_LINE_SIZE] = 0x08;
> +    d->config[PCI_LATENCY_TIMER] = 0x10;
> +    d->config[PCI_CAPABILITY_LIST] = 0x00;
> }
>
> static void unin_main_pci_host_class_init(ObjectClass *klass, void *data)
>