diff options
Diffstat (limited to 'sys/dev/pci/pci.c')
| -rw-r--r-- | sys/dev/pci/pci.c | 49 |
1 files changed, 42 insertions, 7 deletions
diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c index ac29705..172ce81 100644 --- a/sys/dev/pci/pci.c +++ b/sys/dev/pci/pci.c @@ -354,6 +354,11 @@ SYSCTL_INT(_hw_pci, OID_AUTO, clear_buses, CTLFLAG_RDTUN, &pci_clear_buses, 0, "Ignore firmware-assigned bus numbers."); #endif +static int pci_enable_ari = 1; +TUNABLE_INT("hw.pci.enable_ari", &pci_enable_ari); +SYSCTL_INT(_hw_pci, OID_AUTO, enable_ari, CTLFLAG_RDTUN, &pci_enable_ari, + 0, "Enable support for PCIe Alternative RID Interpretation"); + static int pci_has_quirk(uint32_t devid, int quirk) { @@ -3454,6 +3459,19 @@ pci_add_resources(device_t bus, device_t dev, int force, uint32_t prefetchmask) #endif } +static struct pci_devinfo * +pci_identify_function(device_t pcib, device_t dev, int domain, int busno, + int slot, int func, size_t dinfo_size) +{ + struct pci_devinfo *dinfo; + + dinfo = pci_read_device(pcib, domain, busno, slot, func, dinfo_size); + if (dinfo != NULL) + pci_add_child(dev, dinfo); + + return (dinfo); +} + void pci_add_children(device_t dev, int domain, int busno, size_t dinfo_size) { @@ -3463,6 +3481,24 @@ pci_add_children(device_t dev, int domain, int busno, size_t dinfo_size) int maxslots; int s, f, pcifunchigh; uint8_t hdrtype; + int first_func; + + /* + * Try to detect a device at slot 0, function 0. If it exists, try to + * enable ARI. We must enable ARI before detecting the rest of the + * functions on this bus as ARI changes the set of slots and functions + * that are legal on this bus. + */ + dinfo = pci_identify_function(pcib, dev, domain, busno, 0, 0, + dinfo_size); + if (dinfo != NULL && pci_enable_ari) + PCIB_TRY_ENABLE_ARI(pcib, dinfo->cfg.dev); + + /* + * Start looking for new devices on slot 0 at function 1 because we + * just identified the device at slot 0, function 0. + */ + first_func = 1; KASSERT(dinfo_size >= sizeof(struct pci_devinfo), ("dinfo_size too small")); @@ -3475,14 +3511,13 @@ pci_add_children(device_t dev, int domain, int busno, size_t dinfo_size) if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE) continue; if (hdrtype & PCIM_MFDEV) - pcifunchigh = PCI_FUNCMAX; - for (f = 0; f <= pcifunchigh; f++) { - dinfo = pci_read_device(pcib, domain, busno, s, f, + pcifunchigh = PCIB_MAXFUNCS(pcib); + for (f = first_func; f <= pcifunchigh; f++) + pci_identify_function(pcib, dev, domain, busno, s, f, dinfo_size); - if (dinfo != NULL) { - pci_add_child(dev, dinfo); - } - } + + /* For slots after slot 0 we need to check for function 0. */ + first_func = 0; } #undef REG } |
