// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2016 Broadcom
* Author: Jayachandran C <jchandra@broadcom.com>
* Copyright (C) 2016 Semihalf
* Author: Tomasz Nowicki <tn@semihalf.com>
*/
#define pr_fmt(fmt) "ACPI: " fmt
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/pci-ecam.h>
/* Structure to hold entries from the MCFG table */
struct mcfg_entry {
struct list_head list;
phys_addr_t addr;
u16 segment;
u8 bus_start;
u8 bus_end;
};
#ifdef CONFIG_PCI_QUIRKS
struct mcfg_fixup {
char oem_id[ACPI_OEM_ID_SIZE + 1 ];
char oem_table_id[ACPI_OEM_TABLE_ID_SIZE + 1 ];
u32 oem_revision;
u16 segment;
struct resource bus_range;
const struct pci_ecam_ops *ops;
struct resource cfgres;
};
#define MCFG_BUS_RANGE(start, end) DEFINE_RES_NAMED((start), \
((end) - (start) + 1 ), \
NULL, IORESOURCE_BUS)
#define MCFG_BUS_ANY MCFG_BUS_RANGE(0 x0, 0 xff)
static struct mcfg_fixup mcfg_quirks[] = {
/* { OEM_ID, OEM_TABLE_ID, REV, SEGMENT, BUS_RANGE, ops, cfgres }, */
#ifdef CONFIG_ARM64
#define AL_ECAM(table_id, rev, seg, ops) \
{ "AMAZON" , table_id, rev, seg, MCFG_BUS_ANY, ops }
AL_ECAM("GRAVITON" , 0 , 0 , &al_pcie_ops),
AL_ECAM("GRAVITON" , 0 , 1 , &al_pcie_ops),
AL_ECAM("GRAVITON" , 0 , 2 , &al_pcie_ops),
AL_ECAM("GRAVITON" , 0 , 3 , &al_pcie_ops),
AL_ECAM("GRAVITON" , 0 , 4 , &al_pcie_ops),
AL_ECAM("GRAVITON" , 0 , 5 , &al_pcie_ops),
AL_ECAM("GRAVITON" , 0 , 6 , &al_pcie_ops),
AL_ECAM("GRAVITON" , 0 , 7 , &al_pcie_ops),
#define QCOM_ECAM32(seg) \
{ "QCOM " , "QDF2432 " , 1 , seg, MCFG_BUS_ANY, &pci_32b_ops }
QCOM_ECAM32(0 ),
QCOM_ECAM32(1 ),
QCOM_ECAM32(2 ),
QCOM_ECAM32(3 ),
QCOM_ECAM32(4 ),
QCOM_ECAM32(5 ),
QCOM_ECAM32(6 ),
QCOM_ECAM32(7 ),
#define HISI_QUAD_DOM(table_id, seg, ops) \
{ "HISI " , table_id, 0 , (seg) + 0 , MCFG_BUS_ANY, ops }, \
{ "HISI " , table_id, 0 , (seg) + 1 , MCFG_BUS_ANY, ops }, \
{ "HISI " , table_id, 0 , (seg) + 2 , MCFG_BUS_ANY, ops }, \
{ "HISI " , table_id, 0 , (seg) + 3 , MCFG_BUS_ANY, ops }
HISI_QUAD_DOM("HIP05 " , 0 , &hisi_pcie_ops),
HISI_QUAD_DOM("HIP06 " , 0 , &hisi_pcie_ops),
HISI_QUAD_DOM("HIP07 " , 0 , &hisi_pcie_ops),
HISI_QUAD_DOM("HIP07 " , 4 , &hisi_pcie_ops),
HISI_QUAD_DOM("HIP07 " , 8 , &hisi_pcie_ops),
HISI_QUAD_DOM("HIP07 " , 12 , &hisi_pcie_ops),
#define THUNDER_PEM_RES(addr, node) \
DEFINE_RES_MEM((addr) + ((u64) (node) << 44 ), 0 x39 * SZ_16M)
#define THUNDER_PEM_QUIRK(rev, node) \
{ "CAVIUM" , "THUNDERX" , rev, 4 + (10 * (node)), MCFG_BUS_ANY, \
&thunder_pem_ecam_ops, THUNDER_PEM_RES(0 x88001f000000UL, node) }, \
{ "CAVIUM" , "THUNDERX" , rev, 5 + (10 * (node)), MCFG_BUS_ANY, \
&thunder_pem_ecam_ops, THUNDER_PEM_RES(0 x884057000000UL, node) }, \
{ "CAVIUM" , "THUNDERX" , rev, 6 + (10 * (node)), MCFG_BUS_ANY, \
&thunder_pem_ecam_ops, THUNDER_PEM_RES(0 x88808f000000UL, node) }, \
{ "CAVIUM" , "THUNDERX" , rev, 7 + (10 * (node)), MCFG_BUS_ANY, \
&thunder_pem_ecam_ops, THUNDER_PEM_RES(0 x89001f000000UL, node) }, \
{ "CAVIUM" , "THUNDERX" , rev, 8 + (10 * (node)), MCFG_BUS_ANY, \
&thunder_pem_ecam_ops, THUNDER_PEM_RES(0 x894057000000UL, node) }, \
{ "CAVIUM" , "THUNDERX" , rev, 9 + (10 * (node)), MCFG_BUS_ANY, \
&thunder_pem_ecam_ops, THUNDER_PEM_RES(0 x89808f000000UL, node) }
#define THUNDER_ECAM_QUIRK(rev, seg) \
{ "CAVIUM" , "THUNDERX" , rev, seg, MCFG_BUS_ANY, \
&pci_thunder_ecam_ops }
/* SoC pass2.x */
THUNDER_PEM_QUIRK(1 , 0 ),
THUNDER_PEM_QUIRK(1 , 1 ),
THUNDER_ECAM_QUIRK(1 , 10 ),
/* SoC pass1.x */
THUNDER_PEM_QUIRK(2 , 0 ), /* off-chip devices */
THUNDER_PEM_QUIRK(2 , 1 ), /* off-chip devices */
THUNDER_ECAM_QUIRK(2 , 0 ),
THUNDER_ECAM_QUIRK(2 , 1 ),
THUNDER_ECAM_QUIRK(2 , 2 ),
THUNDER_ECAM_QUIRK(2 , 3 ),
THUNDER_ECAM_QUIRK(2 , 10 ),
THUNDER_ECAM_QUIRK(2 , 11 ),
THUNDER_ECAM_QUIRK(2 , 12 ),
THUNDER_ECAM_QUIRK(2 , 13 ),
{ "NVIDIA" , "TEGRA194" , 1 , 0 , MCFG_BUS_ANY, &tegra194_pcie_ops},
{ "NVIDIA" , "TEGRA194" , 1 , 1 , MCFG_BUS_ANY, &tegra194_pcie_ops},
{ "NVIDIA" , "TEGRA194" , 1 , 2 , MCFG_BUS_ANY, &tegra194_pcie_ops},
{ "NVIDIA" , "TEGRA194" , 1 , 3 , MCFG_BUS_ANY, &tegra194_pcie_ops},
{ "NVIDIA" , "TEGRA194" , 1 , 4 , MCFG_BUS_ANY, &tegra194_pcie_ops},
{ "NVIDIA" , "TEGRA194" , 1 , 5 , MCFG_BUS_ANY, &tegra194_pcie_ops},
#define XGENE_V1_ECAM_MCFG(rev, seg) \
{"APM " , "XGENE " , rev, seg, MCFG_BUS_ANY, \
&xgene_v1_pcie_ecam_ops }
#define XGENE_V2_ECAM_MCFG(rev, seg) \
{"APM " , "XGENE " , rev, seg, MCFG_BUS_ANY, \
&xgene_v2_pcie_ecam_ops }
/* X-Gene SoC with v1 PCIe controller */
XGENE_V1_ECAM_MCFG(1 , 0 ),
XGENE_V1_ECAM_MCFG(1 , 1 ),
XGENE_V1_ECAM_MCFG(1 , 2 ),
XGENE_V1_ECAM_MCFG(1 , 3 ),
XGENE_V1_ECAM_MCFG(1 , 4 ),
XGENE_V1_ECAM_MCFG(2 , 0 ),
XGENE_V1_ECAM_MCFG(2 , 1 ),
XGENE_V1_ECAM_MCFG(2 , 2 ),
XGENE_V1_ECAM_MCFG(2 , 3 ),
XGENE_V1_ECAM_MCFG(2 , 4 ),
/* X-Gene SoC with v2.1 PCIe controller */
XGENE_V2_ECAM_MCFG(3 , 0 ),
XGENE_V2_ECAM_MCFG(3 , 1 ),
/* X-Gene SoC with v2.2 PCIe controller */
XGENE_V2_ECAM_MCFG(4 , 0 ),
XGENE_V2_ECAM_MCFG(4 , 1 ),
XGENE_V2_ECAM_MCFG(4 , 2 ),
#define ALTRA_ECAM_QUIRK(rev, seg) \
{ "Ampere" , "Altra " , rev, seg, MCFG_BUS_ANY, &pci_32b_read_ops }
ALTRA_ECAM_QUIRK(1 , 0 ),
ALTRA_ECAM_QUIRK(1 , 1 ),
ALTRA_ECAM_QUIRK(1 , 2 ),
ALTRA_ECAM_QUIRK(1 , 3 ),
ALTRA_ECAM_QUIRK(1 , 4 ),
ALTRA_ECAM_QUIRK(1 , 5 ),
ALTRA_ECAM_QUIRK(1 , 6 ),
ALTRA_ECAM_QUIRK(1 , 7 ),
ALTRA_ECAM_QUIRK(1 , 8 ),
ALTRA_ECAM_QUIRK(1 , 9 ),
ALTRA_ECAM_QUIRK(1 , 10 ),
ALTRA_ECAM_QUIRK(1 , 11 ),
ALTRA_ECAM_QUIRK(1 , 12 ),
ALTRA_ECAM_QUIRK(1 , 13 ),
ALTRA_ECAM_QUIRK(1 , 14 ),
ALTRA_ECAM_QUIRK(1 , 15 ),
#endif /* ARM64 */
#ifdef CONFIG_LOONGARCH
#define LOONGSON_ECAM_MCFG(table_id, seg) \
{ "LOONGS" , table_id, 1 , seg, MCFG_BUS_ANY, &loongson_pci_ecam_ops }
LOONGSON_ECAM_MCFG("\0" , 0 ),
LOONGSON_ECAM_MCFG("LOONGSON" , 0 ),
LOONGSON_ECAM_MCFG("\0" , 1 ),
LOONGSON_ECAM_MCFG("LOONGSON" , 1 ),
LOONGSON_ECAM_MCFG("\0" , 2 ),
LOONGSON_ECAM_MCFG("LOONGSON" , 2 ),
LOONGSON_ECAM_MCFG("\0" , 3 ),
LOONGSON_ECAM_MCFG("LOONGSON" , 3 ),
LOONGSON_ECAM_MCFG("\0" , 4 ),
LOONGSON_ECAM_MCFG("LOONGSON" , 4 ),
LOONGSON_ECAM_MCFG("\0" , 5 ),
LOONGSON_ECAM_MCFG("LOONGSON" , 5 ),
LOONGSON_ECAM_MCFG("\0" , 6 ),
LOONGSON_ECAM_MCFG("LOONGSON" , 6 ),
LOONGSON_ECAM_MCFG("\0" , 7 ),
LOONGSON_ECAM_MCFG("LOONGSON" , 7 ),
#endif /* LOONGARCH */
};
static char mcfg_oem_id[ACPI_OEM_ID_SIZE];
static char mcfg_oem_table_id[ACPI_OEM_TABLE_ID_SIZE];
static u32 mcfg_oem_revision;
static int pci_mcfg_quirk_matches(struct mcfg_fixup *f, u16 segment,
struct resource *bus_range)
{
if (!memcmp(f->oem_id, mcfg_oem_id, ACPI_OEM_ID_SIZE) &&
!memcmp(f->oem_table_id, mcfg_oem_table_id,
ACPI_OEM_TABLE_ID_SIZE) &&
f->oem_revision == mcfg_oem_revision &&
f->segment == segment &&
resource_contains(&f->bus_range, bus_range))
return 1 ;
return 0 ;
}
#endif
static void pci_mcfg_apply_quirks(struct acpi_pci_root *root,
struct resource *cfgres,
const struct pci_ecam_ops **ecam_ops)
{
#ifdef CONFIG_PCI_QUIRKS
u16 segment = root->segment;
struct resource *bus_range = &root->secondary;
struct mcfg_fixup *f;
int i;
for (i = 0 , f = mcfg_quirks; i < ARRAY_SIZE(mcfg_quirks); i++, f++) {
if (pci_mcfg_quirk_matches(f, segment, bus_range)) {
if (f->cfgres.start)
*cfgres = f->cfgres;
if (f->ops)
*ecam_ops = f->ops;
dev_info(&root->device->dev, "MCFG quirk: ECAM at %pR for %pR with %ps\n" ,
cfgres, bus_range, *ecam_ops);
return ;
}
}
#endif
}
/* List to save MCFG entries */
static LIST_HEAD(pci_mcfg_list);
int pci_mcfg_lookup(struct acpi_pci_root *root, struct resource *cfgres,
const struct pci_ecam_ops **ecam_ops)
{
const struct pci_ecam_ops *ops = &pci_generic_ecam_ops;
struct resource *bus_res = &root->secondary;
u16 seg = root->segment;
struct mcfg_entry *e;
struct resource res;
/* Use address from _CBA if present, otherwise lookup MCFG */
if (root->mcfg_addr)
goto skip_lookup;
/*
* We expect the range in bus_res in the coverage of MCFG bus range.
*/
list_for_each_entry(e, &pci_mcfg_list, list) {
if (e->segment == seg && e->bus_start <= bus_res->start &&
e->bus_end >= bus_res->end) {
root->mcfg_addr = e->addr;
}
}
skip_lookup:
memset(&res, 0 , sizeof (res));
if (root->mcfg_addr) {
res.start = root->mcfg_addr + (bus_res->start << 20 );
res.end = res.start + (resource_size(bus_res) << 20 ) - 1 ;
res.flags = IORESOURCE_MEM;
}
/*
* Allow quirks to override default ECAM ops and CFG resource
* range. This may even fabricate a CFG resource range in case
* MCFG does not have it. Invalid CFG start address means MCFG
* firmware bug or we need another quirk in array.
*/
pci_mcfg_apply_quirks(root, &res, &ops);
if (!res.start)
return -ENXIO;
*cfgres = res;
*ecam_ops = ops;
return 0 ;
}
static __init int pci_mcfg_parse(struct acpi_table_header *header)
{
struct acpi_table_mcfg *mcfg;
struct acpi_mcfg_allocation *mptr;
struct mcfg_entry *e, *arr;
int i, n;
if (header->length < sizeof (struct acpi_table_mcfg))
return -EINVAL;
n = (header->length - sizeof (struct acpi_table_mcfg)) /
sizeof (struct acpi_mcfg_allocation);
mcfg = (struct acpi_table_mcfg *)header;
mptr = (struct acpi_mcfg_allocation *) &mcfg[1 ];
arr = kcalloc(n, sizeof (*arr), GFP_KERNEL);
if (!arr)
return -ENOMEM;
for (i = 0 , e = arr; i < n; i++, mptr++, e++) {
e->segment = mptr->pci_segment;
e->addr = mptr->address;
e->bus_start = mptr->start_bus_number;
e->bus_end = mptr->end_bus_number;
list_add(&e->list, &pci_mcfg_list);
}
#ifdef CONFIG_PCI_QUIRKS
/* Save MCFG IDs and revision for quirks matching */
memcpy(mcfg_oem_id, header->oem_id, ACPI_OEM_ID_SIZE);
memcpy(mcfg_oem_table_id, header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE);
mcfg_oem_revision = header->oem_revision;
#endif
pr_info("MCFG table detected, %d entries\n" , n);
return 0 ;
}
/* Interface called by ACPI - parse and save MCFG table */
void __init pci_mmcfg_late_init(void )
{
int err = acpi_table_parse(ACPI_SIG_MCFG, pci_mcfg_parse);
if (err)
pr_debug("Failed to parse MCFG (%d)\n" , err);
}
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