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pci-v4.15-fixes-2
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This commit is contained in:
commit
8e66791a80
4 changed files with 30 additions and 11 deletions
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@ -3097,6 +3097,12 @@
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pcie_scan_all Scan all possible PCIe devices. Otherwise we
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only look for one device below a PCIe downstream
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port.
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big_root_window Try to add a big 64bit memory window to the PCIe
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root complex on AMD CPUs. Some GFX hardware
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can resize a BAR to allow access to all VRAM.
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Adding the window is slightly risky (it may
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conflict with unreported devices), so this
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taints the kernel.
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pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power
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Management.
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@ -38,6 +38,7 @@ do { \
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#define PCI_NOASSIGN_ROMS 0x80000
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#define PCI_ROOT_NO_CRS 0x100000
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#define PCI_NOASSIGN_BARS 0x200000
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#define PCI_BIG_ROOT_WINDOW 0x400000
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extern unsigned int pci_probe;
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extern unsigned long pirq_table_addr;
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@ -594,6 +594,11 @@ char *__init pcibios_setup(char *str)
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} else if (!strcmp(str, "nocrs")) {
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pci_probe |= PCI_ROOT_NO_CRS;
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return NULL;
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#ifdef CONFIG_PHYS_ADDR_T_64BIT
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} else if (!strcmp(str, "big_root_window")) {
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pci_probe |= PCI_BIG_ROOT_WINDOW;
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return NULL;
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#endif
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} else if (!strcmp(str, "earlydump")) {
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pci_early_dump_regs = 1;
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return NULL;
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@ -662,10 +662,14 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2033, quirk_no_aersid);
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*/
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static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
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{
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unsigned i;
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u32 base, limit, high;
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struct resource *res, *conflict;
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struct pci_dev *other;
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struct resource *res;
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unsigned i;
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int r;
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if (!(pci_probe & PCI_BIG_ROOT_WINDOW))
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return;
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/* Check that we are the only device of that type */
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other = pci_get_device(dev->vendor, dev->device, NULL);
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@ -699,22 +703,25 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
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if (!res)
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return;
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/*
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* Allocate a 256GB window directly below the 0xfd00000000 hardware
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* limit (see AMD Family 15h Models 30h-3Fh BKDG, sec 2.4.6).
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*/
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res->name = "PCI Bus 0000:00";
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res->flags = IORESOURCE_PREFETCH | IORESOURCE_MEM |
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IORESOURCE_MEM_64 | IORESOURCE_WINDOW;
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res->start = 0x100000000ull;
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res->start = 0xbd00000000ull;
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res->end = 0xfd00000000ull - 1;
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/* Just grab the free area behind system memory for this */
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while ((conflict = request_resource_conflict(&iomem_resource, res))) {
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if (conflict->end >= res->end) {
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kfree(res);
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return;
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}
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res->start = conflict->end + 1;
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r = request_resource(&iomem_resource, res);
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if (r) {
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kfree(res);
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return;
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}
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dev_info(&dev->dev, "adding root bus resource %pR\n", res);
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dev_info(&dev->dev, "adding root bus resource %pR (tainting kernel)\n",
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res);
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add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
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base = ((res->start >> 8) & AMD_141b_MMIO_BASE_MMIOBASE_MASK) |
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AMD_141b_MMIO_BASE_RE_MASK | AMD_141b_MMIO_BASE_WE_MASK;
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