diff options
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 5f10c23dff9..08a95b369d8 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1905,7 +1905,7 @@ void pci_enable_ari(struct pci_dev *dev) { int pos; u32 cap; - u16 ctrl; + u16 flags, ctrl; struct pci_dev *bridge; if (!pci_is_pcie(dev) || dev->devfn) @@ -1923,6 +1923,11 @@ void pci_enable_ari(struct pci_dev *dev) if (!pos) return; + /* ARI is a PCIe v2 feature */ + pci_read_config_word(bridge, pos + PCI_EXP_FLAGS, &flags); + if ((flags & PCI_EXP_FLAGS_VERS) < 2) + return; + pci_read_config_dword(bridge, pos + PCI_EXP_DEVCAP2, &cap); if (!(cap & PCI_EXP_DEVCAP2_ARI)) return; @@ -3186,7 +3191,7 @@ EXPORT_SYMBOL(pcie_get_readrq); * @rq: maximum memory read count in bytes * valid values are 128, 256, 512, 1024, 2048, 4096 * - * If possible sets maximum read byte count + * If possible sets maximum memory read request in bytes */ int pcie_set_readrq(struct pci_dev *dev, int rq) { @@ -3209,7 +3214,7 @@ int pcie_set_readrq(struct pci_dev *dev, int rq) if ((ctl & PCI_EXP_DEVCTL_READRQ) != v) { ctl &= ~PCI_EXP_DEVCTL_READRQ; ctl |= v; - err = pci_write_config_dword(dev, cap + PCI_EXP_DEVCTL, ctl); + err = pci_write_config_word(dev, cap + PCI_EXP_DEVCTL, ctl); } out: @@ -3284,7 +3289,7 @@ static int pci_set_vga_state_arch(struct pci_dev *dev, bool decode, * @dev: the PCI device * @decode: true = enable decoding, false = disable decoding * @command_bits: PCI_COMMAND_IO and/or PCI_COMMAND_MEMORY - * @change_bridge_flags: traverse ancestors and change bridges + * @flags: traverse ancestors and change bridges * CHANGE_BRIDGE_ONLY / CHANGE_BRIDGE */ int pci_set_vga_state(struct pci_dev *dev, bool decode, @@ -3483,6 +3488,8 @@ static int __init pci_setup(char *str) pci_no_msi(); } else if (!strcmp(str, "noaer")) { pci_no_aer(); + } else if (!strncmp(str, "realloc", 7)) { + pci_realloc(); } else if (!strcmp(str, "nodomains")) { pci_no_domains(); } else if (!strncmp(str, "cbiosize=", 9)) { |