diff options
Diffstat (limited to 'hw/pci.c')
| -rw-r--r-- | hw/pci.c | 77 |
1 files changed, 77 insertions, 0 deletions
@@ -26,6 +26,7 @@ #include "console.h" #include "net.h" #include "virtio-net.h" +#include "sysemu.h" //#define DEBUG_PCI @@ -158,6 +159,82 @@ static int pci_set_default_subsystem_id(PCIDevice *pci_dev) return 0; } +/* + * Parse [[<domain>:]<bus>:]<slot>, return -1 on error + */ +static int pci_parse_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp) +{ + const char *p; + char *e; + unsigned long val; + unsigned long dom = 0, bus = 0; + unsigned slot = 0; + + p = addr; + val = strtoul(p, &e, 16); + if (e == p) + return -1; + if (*e == ':') { + bus = val; + p = e + 1; + val = strtoul(p, &e, 16); + if (e == p) + return -1; + if (*e == ':') { + dom = bus; + bus = val; + p = e + 1; + val = strtoul(p, &e, 16); + if (e == p) + return -1; + } + } + + if (dom > 0xffff || bus > 0xff || val > 0x1f) + return -1; + + slot = val; + + if (*e) + return -1; + + /* Note: QEMU doesn't implement domains other than 0 */ + if (dom != 0 || pci_find_bus(bus) == NULL) + return -1; + + *domp = dom; + *busp = bus; + *slotp = slot; + return 0; +} + +int pci_read_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp) +{ + char devaddr[32]; + + if (!get_param_value(devaddr, sizeof(devaddr), "pci_addr", addr)) + return -1; + + return pci_parse_devaddr(devaddr, domp, busp, slotp); +} + +int pci_assign_devaddr(const char *addr, int *domp, int *busp, unsigned *slotp) +{ + char devaddr[32]; + + if (!get_param_value(devaddr, sizeof(devaddr), "pci_addr", addr)) + return -1; + + if (!strcmp(devaddr, "auto")) { + *domp = *busp = 0; + *slotp = -1; + /* want to support dom/bus auto-assign at some point */ + return 0; + } + + return pci_parse_devaddr(devaddr, domp, busp, slotp); +} + /* -1 for devfn means auto assign */ PCIDevice *pci_register_device(PCIBus *bus, const char *name, int instance_size, int devfn, |