On Mon, Nov 15, 2010 at 04:30:43PM +0900, Isaku Yamahata wrote:
> introduce a function to parse pci device path of
> the format, [Domain:]Slot.Function:Slot.Function....:Slot.Function.
>
> Signed-off-by: Isaku Yamahata <[email protected]>
Hmm.
How about we use openfirmware path like what Gleb's patch does,
with a fallback to bus:dev.fn for when it's unambiguous?
> ---
> hw/pci.c | 87
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> hw/pci.h | 1 +
> 2 files changed, 88 insertions(+), 0 deletions(-)
>
> diff --git a/hw/pci.c b/hw/pci.c
> index fba765b..6a9a5ef 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -433,6 +433,93 @@ static void pci_set_default_subsystem_id(PCIDevice
> *pci_dev)
> }
>
> /*
> + * Parse format [Domain:]Slot.Function:Slot.Function....:Slot.Function
> + * and get PCIDevice
> + * return 0 on success
> + * -1 on error: format is invalid or device isn't found.
> + */
> +int pci_parse_dev_path(const char *addr, PCIDevice **pdev)
> +{
> + unsigned long domain;
> + unsigned long slot;
> + unsigned long func;
> + const char *p;
> + char *e;
> + unsigned long val;
> + PCIBus *bus;
> + PCIBus *child_bus;
> + PCIDevice *d;
> +
> + p = addr;
> + val = strtoul(p, &e, 0);
> + if (e == p) {
> + return -1;
> + }
> + if (*e == ':') {
> + domain = val;
> + p = e + 1;
> + val = strtoul(p, &e, 0);
> + if (e == p) {
> + return -1;
> + }
> + } else if (*e == '.'){
> + domain = 0;
> + } else {
> + return -1;
> + }
> + if (domain > 0xffff) {
> + return -1;
> + }
> +
> + bus = pci_find_root_bus(domain);
> + if (!bus) {
> + return -1;
> + }
> +
> + for (;;) {
> + slot = val;
> + if (*e != '.') {
> + return -1;
> + }
> + p = e + 1;
> + val = strtoul(p, &e, 0);
> + if (e == p) {
> + return -1;
> + }
> + func = val;
> + if (slot > 0x1f || func >= PCI_FUNC_MAX) {
> + return -1;
> + }
> + d = bus->devices[PCI_DEVFN(slot, func)];
> + if (!d) {
> + return -1;
> + }
> + if (*e == '\0') {
> + break;
> + }
> +
> + if (*e != ':') {
> + return -1;
> + }
> + p = e + 1;
> + val = strtoul(p, &e, 0);
> + if (e == p) {
> + return -1;
> + }
> + QLIST_FOREACH(child_bus, &bus->child, sibling) {
> + if (child_bus->parent_dev == d) {
> + bus = child_bus;
> + continue;
> + }
> + }
> + return -1;
> + }
> +
> + *pdev = d;
> + return 0;
> +}
> +
> +/*
> * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
> * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
> */
> diff --git a/hw/pci.h b/hw/pci.h
> index 7100804..8c16f91 100644
> --- a/hw/pci.h
> +++ b/hw/pci.h
> @@ -239,6 +239,7 @@ PCIBus *pci_find_bus(PCIBus *bus, int bus_num);
> PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function);
> PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
>
> +int pci_parse_dev_path(const char *addr, PCIDevice **pdev);
> int pci_parse_devaddr(const char *addr, int *domp, int *busp,
> unsigned int *slotp, unsigned int *funcp);
> int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
> --
> 1.7.1.1
