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53762ba810
The configuration data provided by an MCFG entry, i.e., PCI segment and bus
range, may span multiple host bridges.
pci_mcfg_lookup() previously required an exact match of the host bridge
starting bus and the MCFG starting bus, which made the following
configuration fail:
MCFG region:
segment: 0
bus range: 0x00-0xff
host bridge
segment: 0
bus range: 0x20-0x4f
Relax the bus range check in pci_mcfg_lookup() so we can use any MCFG entry
that contains the required bus range, as we do in pci_mmconfig_lookup().
[bhelgaas: changelog]
Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Tomasz Nowicki <tn@semihalf.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
276 lines
8.3 KiB
C
276 lines
8.3 KiB
C
/*
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* Copyright (C) 2016 Broadcom
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* Author: Jayachandran C <jchandra@broadcom.com>
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* Copyright (C) 2016 Semihalf
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* Author: Tomasz Nowicki <tn@semihalf.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation (the "GPL").
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License version 2 (GPLv2) for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 (GPLv2) along with this source code.
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*/
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#define pr_fmt(fmt) "ACPI: " fmt
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#include <linux/kernel.h>
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#include <linux/pci.h>
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#include <linux/pci-acpi.h>
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#include <linux/pci-ecam.h>
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/* Structure to hold entries from the MCFG table */
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struct mcfg_entry {
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struct list_head list;
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phys_addr_t addr;
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u16 segment;
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u8 bus_start;
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u8 bus_end;
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};
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#ifdef CONFIG_PCI_QUIRKS
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struct mcfg_fixup {
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char oem_id[ACPI_OEM_ID_SIZE + 1];
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char oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1];
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u32 oem_revision;
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u16 segment;
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struct resource bus_range;
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struct pci_ecam_ops *ops;
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struct resource cfgres;
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};
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#define MCFG_BUS_RANGE(start, end) DEFINE_RES_NAMED((start), \
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((end) - (start) + 1), \
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NULL, IORESOURCE_BUS)
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#define MCFG_BUS_ANY MCFG_BUS_RANGE(0x0, 0xff)
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static struct mcfg_fixup mcfg_quirks[] = {
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/* { OEM_ID, OEM_TABLE_ID, REV, SEGMENT, BUS_RANGE, ops, cfgres }, */
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#define QCOM_ECAM32(seg) \
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{ "QCOM ", "QDF2432 ", 1, seg, MCFG_BUS_ANY, &pci_32b_ops }
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QCOM_ECAM32(0),
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QCOM_ECAM32(1),
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QCOM_ECAM32(2),
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QCOM_ECAM32(3),
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QCOM_ECAM32(4),
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QCOM_ECAM32(5),
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QCOM_ECAM32(6),
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QCOM_ECAM32(7),
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#define HISI_QUAD_DOM(table_id, seg, ops) \
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{ "HISI ", table_id, 0, (seg) + 0, MCFG_BUS_ANY, ops }, \
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{ "HISI ", table_id, 0, (seg) + 1, MCFG_BUS_ANY, ops }, \
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{ "HISI ", table_id, 0, (seg) + 2, MCFG_BUS_ANY, ops }, \
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{ "HISI ", table_id, 0, (seg) + 3, MCFG_BUS_ANY, ops }
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HISI_QUAD_DOM("HIP05 ", 0, &hisi_pcie_ops),
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HISI_QUAD_DOM("HIP06 ", 0, &hisi_pcie_ops),
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HISI_QUAD_DOM("HIP07 ", 0, &hisi_pcie_ops),
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HISI_QUAD_DOM("HIP07 ", 4, &hisi_pcie_ops),
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HISI_QUAD_DOM("HIP07 ", 8, &hisi_pcie_ops),
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HISI_QUAD_DOM("HIP07 ", 12, &hisi_pcie_ops),
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#define THUNDER_PEM_RES(addr, node) \
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DEFINE_RES_MEM((addr) + ((u64) (node) << 44), 0x39 * SZ_16M)
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#define THUNDER_PEM_QUIRK(rev, node) \
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{ "CAVIUM", "THUNDERX", rev, 4 + (10 * (node)), MCFG_BUS_ANY, \
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&thunder_pem_ecam_ops, THUNDER_PEM_RES(0x88001f000000UL, node) }, \
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{ "CAVIUM", "THUNDERX", rev, 5 + (10 * (node)), MCFG_BUS_ANY, \
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&thunder_pem_ecam_ops, THUNDER_PEM_RES(0x884057000000UL, node) }, \
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{ "CAVIUM", "THUNDERX", rev, 6 + (10 * (node)), MCFG_BUS_ANY, \
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&thunder_pem_ecam_ops, THUNDER_PEM_RES(0x88808f000000UL, node) }, \
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{ "CAVIUM", "THUNDERX", rev, 7 + (10 * (node)), MCFG_BUS_ANY, \
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&thunder_pem_ecam_ops, THUNDER_PEM_RES(0x89001f000000UL, node) }, \
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{ "CAVIUM", "THUNDERX", rev, 8 + (10 * (node)), MCFG_BUS_ANY, \
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&thunder_pem_ecam_ops, THUNDER_PEM_RES(0x894057000000UL, node) }, \
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{ "CAVIUM", "THUNDERX", rev, 9 + (10 * (node)), MCFG_BUS_ANY, \
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&thunder_pem_ecam_ops, THUNDER_PEM_RES(0x89808f000000UL, node) }
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/* SoC pass2.x */
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THUNDER_PEM_QUIRK(1, 0),
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THUNDER_PEM_QUIRK(1, 1),
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#define THUNDER_ECAM_QUIRK(rev, seg) \
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{ "CAVIUM", "THUNDERX", rev, seg, MCFG_BUS_ANY, \
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&pci_thunder_ecam_ops }
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/* SoC pass1.x */
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THUNDER_PEM_QUIRK(2, 0), /* off-chip devices */
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THUNDER_PEM_QUIRK(2, 1), /* off-chip devices */
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THUNDER_ECAM_QUIRK(2, 0),
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THUNDER_ECAM_QUIRK(2, 1),
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THUNDER_ECAM_QUIRK(2, 2),
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THUNDER_ECAM_QUIRK(2, 3),
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THUNDER_ECAM_QUIRK(2, 10),
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THUNDER_ECAM_QUIRK(2, 11),
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THUNDER_ECAM_QUIRK(2, 12),
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THUNDER_ECAM_QUIRK(2, 13),
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#define XGENE_V1_ECAM_MCFG(rev, seg) \
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{"APM ", "XGENE ", rev, seg, MCFG_BUS_ANY, \
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&xgene_v1_pcie_ecam_ops }
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#define XGENE_V2_ECAM_MCFG(rev, seg) \
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{"APM ", "XGENE ", rev, seg, MCFG_BUS_ANY, \
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&xgene_v2_pcie_ecam_ops }
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/* X-Gene SoC with v1 PCIe controller */
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XGENE_V1_ECAM_MCFG(1, 0),
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XGENE_V1_ECAM_MCFG(1, 1),
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XGENE_V1_ECAM_MCFG(1, 2),
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XGENE_V1_ECAM_MCFG(1, 3),
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XGENE_V1_ECAM_MCFG(1, 4),
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XGENE_V1_ECAM_MCFG(2, 0),
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XGENE_V1_ECAM_MCFG(2, 1),
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XGENE_V1_ECAM_MCFG(2, 2),
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XGENE_V1_ECAM_MCFG(2, 3),
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XGENE_V1_ECAM_MCFG(2, 4),
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/* X-Gene SoC with v2.1 PCIe controller */
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XGENE_V2_ECAM_MCFG(3, 0),
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XGENE_V2_ECAM_MCFG(3, 1),
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/* X-Gene SoC with v2.2 PCIe controller */
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XGENE_V2_ECAM_MCFG(4, 0),
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XGENE_V2_ECAM_MCFG(4, 1),
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XGENE_V2_ECAM_MCFG(4, 2),
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};
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static char mcfg_oem_id[ACPI_OEM_ID_SIZE];
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static char mcfg_oem_table_id[ACPI_OEM_TABLE_ID_SIZE];
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static u32 mcfg_oem_revision;
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static int pci_mcfg_quirk_matches(struct mcfg_fixup *f, u16 segment,
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struct resource *bus_range)
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{
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if (!memcmp(f->oem_id, mcfg_oem_id, ACPI_OEM_ID_SIZE) &&
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!memcmp(f->oem_table_id, mcfg_oem_table_id,
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ACPI_OEM_TABLE_ID_SIZE) &&
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f->oem_revision == mcfg_oem_revision &&
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f->segment == segment &&
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resource_contains(&f->bus_range, bus_range))
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return 1;
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return 0;
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}
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#endif
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static void pci_mcfg_apply_quirks(struct acpi_pci_root *root,
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struct resource *cfgres,
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struct pci_ecam_ops **ecam_ops)
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{
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#ifdef CONFIG_PCI_QUIRKS
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u16 segment = root->segment;
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struct resource *bus_range = &root->secondary;
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struct mcfg_fixup *f;
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int i;
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for (i = 0, f = mcfg_quirks; i < ARRAY_SIZE(mcfg_quirks); i++, f++) {
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if (pci_mcfg_quirk_matches(f, segment, bus_range)) {
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if (f->cfgres.start)
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*cfgres = f->cfgres;
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if (f->ops)
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*ecam_ops = f->ops;
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dev_info(&root->device->dev, "MCFG quirk: ECAM at %pR for %pR with %ps\n",
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cfgres, bus_range, *ecam_ops);
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return;
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}
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}
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#endif
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}
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/* List to save MCFG entries */
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static LIST_HEAD(pci_mcfg_list);
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int pci_mcfg_lookup(struct acpi_pci_root *root, struct resource *cfgres,
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struct pci_ecam_ops **ecam_ops)
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{
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struct pci_ecam_ops *ops = &pci_generic_ecam_ops;
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struct resource *bus_res = &root->secondary;
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u16 seg = root->segment;
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struct mcfg_entry *e;
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struct resource res;
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/* Use address from _CBA if present, otherwise lookup MCFG */
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if (root->mcfg_addr)
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goto skip_lookup;
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/*
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* We expect the range in bus_res in the coverage of MCFG bus range.
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*/
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list_for_each_entry(e, &pci_mcfg_list, list) {
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if (e->segment == seg && e->bus_start <= bus_res->start &&
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e->bus_end >= bus_res->end) {
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root->mcfg_addr = e->addr;
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}
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}
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skip_lookup:
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memset(&res, 0, sizeof(res));
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if (root->mcfg_addr) {
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res.start = root->mcfg_addr + (bus_res->start << 20);
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res.end = res.start + (resource_size(bus_res) << 20) - 1;
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res.flags = IORESOURCE_MEM;
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}
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/*
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* Allow quirks to override default ECAM ops and CFG resource
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* range. This may even fabricate a CFG resource range in case
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* MCFG does not have it. Invalid CFG start address means MCFG
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* firmware bug or we need another quirk in array.
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*/
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pci_mcfg_apply_quirks(root, &res, &ops);
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if (!res.start)
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return -ENXIO;
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*cfgres = res;
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*ecam_ops = ops;
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return 0;
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}
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static __init int pci_mcfg_parse(struct acpi_table_header *header)
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{
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struct acpi_table_mcfg *mcfg;
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struct acpi_mcfg_allocation *mptr;
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struct mcfg_entry *e, *arr;
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int i, n;
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if (header->length < sizeof(struct acpi_table_mcfg))
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return -EINVAL;
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n = (header->length - sizeof(struct acpi_table_mcfg)) /
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sizeof(struct acpi_mcfg_allocation);
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mcfg = (struct acpi_table_mcfg *)header;
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mptr = (struct acpi_mcfg_allocation *) &mcfg[1];
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arr = kcalloc(n, sizeof(*arr), GFP_KERNEL);
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if (!arr)
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return -ENOMEM;
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for (i = 0, e = arr; i < n; i++, mptr++, e++) {
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e->segment = mptr->pci_segment;
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e->addr = mptr->address;
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e->bus_start = mptr->start_bus_number;
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e->bus_end = mptr->end_bus_number;
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list_add(&e->list, &pci_mcfg_list);
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}
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#ifdef CONFIG_PCI_QUIRKS
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/* Save MCFG IDs and revision for quirks matching */
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memcpy(mcfg_oem_id, header->oem_id, ACPI_OEM_ID_SIZE);
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memcpy(mcfg_oem_table_id, header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE);
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mcfg_oem_revision = header->oem_revision;
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#endif
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pr_info("MCFG table detected, %d entries\n", n);
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return 0;
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}
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/* Interface called by ACPI - parse and save MCFG table */
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void __init pci_mmcfg_late_init(void)
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{
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int err = acpi_table_parse(ACPI_SIG_MCFG, pci_mcfg_parse);
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if (err)
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pr_err("Failed to parse MCFG (%d)\n", err);
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}
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