Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 324 insertions, 0 deletions

diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
new file mode 100644
index 000000000..860014b89
--- /dev/null
+++ b/drivers/acpi/pci_mcfg.c
@@ -0,0 +1,324 @@
+// 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(0x0, 0xff)
+
+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), 0x39 * SZ_16M)
+
+#define THUNDER_PEM_QUIRK(rev, node) \
+	{ "CAVIUM", "THUNDERX", rev, 4 + (10 * (node)), MCFG_BUS_ANY,	    \
+	  &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x88001f000000UL, node) },  \
+	{ "CAVIUM", "THUNDERX", rev, 5 + (10 * (node)), MCFG_BUS_ANY,	    \
+	  &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x884057000000UL, node) },  \
+	{ "CAVIUM", "THUNDERX", rev, 6 + (10 * (node)), MCFG_BUS_ANY,	    \
+	  &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x88808f000000UL, node) },  \
+	{ "CAVIUM", "THUNDERX", rev, 7 + (10 * (node)), MCFG_BUS_ANY,	    \
+	  &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x89001f000000UL, node) },  \
+	{ "CAVIUM", "THUNDERX", rev, 8 + (10 * (node)), MCFG_BUS_ANY,	    \
+	  &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x894057000000UL, node) },  \
+	{ "CAVIUM", "THUNDERX", rev, 9 + (10 * (node)), MCFG_BUS_ANY,	    \
+	  &thunder_pem_ecam_ops, THUNDER_PEM_RES(0x89808f000000UL, 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),
+#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);
+}