1 files changed, 0 insertions, 473 deletions
diff --git a/drivers/pci/host/pci-thunder-pem.c b/drivers/pci/host/pci-thunder-pem.c
deleted file mode 100644
index f127ce8bd4ef..000000000000
--- a/drivers/pci/host/pci-thunder-pem.c
+++ /dev/null
@@ -1,473 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2015 - 2016 Cavium, Inc.
- */
-
-#include <linux/bitfield.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/of_address.h>
-#include <linux/of_pci.h>
-#include <linux/pci-acpi.h>
-#include <linux/pci-ecam.h>
-#include <linux/platform_device.h>
-#include "../pci.h"
-
-#if defined(CONFIG_PCI_HOST_THUNDER_PEM) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS))
-
-#define PEM_CFG_WR 0x28
-#define PEM_CFG_RD 0x30
-
-struct thunder_pem_pci {
-	u32		ea_entry[3];
-	void __iomem	*pem_reg_base;
-};
-
-static int thunder_pem_bridge_read(struct pci_bus *bus, unsigned int devfn,
-				   int where, int size, u32 *val)
-{
-	u64 read_val, tmp_val;
-	struct pci_config_window *cfg = bus->sysdata;
-	struct thunder_pem_pci *pem_pci = (struct thunder_pem_pci *)cfg->priv;
-
-	if (devfn != 0 || where >= 2048) {
-		*val = ~0;
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	}
-
-	/*
-	 * 32-bit accesses only.  Write the address to the low order
-	 * bits of PEM_CFG_RD, then trigger the read by reading back.
-	 * The config data lands in the upper 32-bits of PEM_CFG_RD.
-	 */
-	read_val = where & ~3ull;
-	writeq(read_val, pem_pci->pem_reg_base + PEM_CFG_RD);
-	read_val = readq(pem_pci->pem_reg_base + PEM_CFG_RD);
-	read_val >>= 32;
-
-	/*
-	 * The config space contains some garbage, fix it up.  Also
-	 * synthesize an EA capability for the BAR used by MSI-X.
-	 */
-	switch (where & ~3) {
-	case 0x40:
-		read_val &= 0xffff00ff;
-		read_val |= 0x00007000; /* Skip MSI CAP */
-		break;
-	case 0x70: /* Express Cap */
-		/*
-		 * Change PME interrupt to vector 2 on T88 where it
-		 * reads as 0, else leave it alone.
-		 */
-		if (!(read_val & (0x1f << 25)))
-			read_val |= (2u << 25);
-		break;
-	case 0xb0: /* MSI-X Cap */
-		/* TableSize=2 or 4, Next Cap is EA */
-		read_val &= 0xc00000ff;
-		/*
-		 * If Express Cap(0x70) raw PME vector reads as 0 we are on
-		 * T88 and TableSize is reported as 4, else TableSize
-		 * is 2.
-		 */
-		writeq(0x70, pem_pci->pem_reg_base + PEM_CFG_RD);
-		tmp_val = readq(pem_pci->pem_reg_base + PEM_CFG_RD);
-		tmp_val >>= 32;
-		if (!(tmp_val & (0x1f << 25)))
-			read_val |= 0x0003bc00;
-		else
-			read_val |= 0x0001bc00;
-		break;
-	case 0xb4:
-		/* Table offset=0, BIR=0 */
-		read_val = 0x00000000;
-		break;
-	case 0xb8:
-		/* BPA offset=0xf0000, BIR=0 */
-		read_val = 0x000f0000;
-		break;
-	case 0xbc:
-		/* EA, 1 entry, no next Cap */
-		read_val = 0x00010014;
-		break;
-	case 0xc0:
-		/* DW2 for type-1 */
-		read_val = 0x00000000;
-		break;
-	case 0xc4:
-		/* Entry BEI=0, PP=0x00, SP=0xff, ES=3 */
-		read_val = 0x80ff0003;
-		break;
-	case 0xc8:
-		read_val = pem_pci->ea_entry[0];
-		break;
-	case 0xcc:
-		read_val = pem_pci->ea_entry[1];
-		break;
-	case 0xd0:
-		read_val = pem_pci->ea_entry[2];
-		break;
-	default:
-		break;
-	}
-	read_val >>= (8 * (where & 3));
-	switch (size) {
-	case 1:
-		read_val &= 0xff;
-		break;
-	case 2:
-		read_val &= 0xffff;
-		break;
-	default:
-		break;
-	}
-	*val = read_val;
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int thunder_pem_config_read(struct pci_bus *bus, unsigned int devfn,
-				   int where, int size, u32 *val)
-{
-	struct pci_config_window *cfg = bus->sysdata;
-
-	if (bus->number < cfg->busr.start ||
-	    bus->number > cfg->busr.end)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	/*
-	 * The first device on the bus is the PEM PCIe bridge.
-	 * Special case its config access.
-	 */
-	if (bus->number == cfg->busr.start)
-		return thunder_pem_bridge_read(bus, devfn, where, size, val);
-
-	return pci_generic_config_read(bus, devfn, where, size, val);
-}
-
-/*
- * Some of the w1c_bits below also include read-only or non-writable
- * reserved bits, this makes the code simpler and is OK as the bits
- * are not affected by writing zeros to them.
- */
-static u32 thunder_pem_bridge_w1c_bits(u64 where_aligned)
-{
-	u32 w1c_bits = 0;
-
-	switch (where_aligned) {
-	case 0x04: /* Command/Status */
-	case 0x1c: /* Base and I/O Limit/Secondary Status */
-		w1c_bits = 0xff000000;
-		break;
-	case 0x44: /* Power Management Control and Status */
-		w1c_bits = 0xfffffe00;
-		break;
-	case 0x78: /* Device Control/Device Status */
-	case 0x80: /* Link Control/Link Status */
-	case 0x88: /* Slot Control/Slot Status */
-	case 0x90: /* Root Status */
-	case 0xa0: /* Link Control 2 Registers/Link Status 2 */
-		w1c_bits = 0xffff0000;
-		break;
-	case 0x104: /* Uncorrectable Error Status */
-	case 0x110: /* Correctable Error Status */
-	case 0x130: /* Error Status */
-	case 0x160: /* Link Control 4 */
-		w1c_bits = 0xffffffff;
-		break;
-	default:
-		break;
-	}
-	return w1c_bits;
-}
-
-/* Some bits must be written to one so they appear to be read-only. */
-static u32 thunder_pem_bridge_w1_bits(u64 where_aligned)
-{
-	u32 w1_bits;
-
-	switch (where_aligned) {
-	case 0x1c: /* I/O Base / I/O Limit, Secondary Status */
-		/* Force 32-bit I/O addressing. */
-		w1_bits = 0x0101;
-		break;
-	case 0x24: /* Prefetchable Memory Base / Prefetchable Memory Limit */
-		/* Force 64-bit addressing */
-		w1_bits = 0x00010001;
-		break;
-	default:
-		w1_bits = 0;
-		break;
-	}
-	return w1_bits;
-}
-
-static int thunder_pem_bridge_write(struct pci_bus *bus, unsigned int devfn,
-				    int where, int size, u32 val)
-{
-	struct pci_config_window *cfg = bus->sysdata;
-	struct thunder_pem_pci *pem_pci = (struct thunder_pem_pci *)cfg->priv;
-	u64 write_val, read_val;
-	u64 where_aligned = where & ~3ull;
-	u32 mask = 0;
-
-
-	if (devfn != 0 || where >= 2048)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	/*
-	 * 32-bit accesses only.  If the write is for a size smaller
-	 * than 32-bits, we must first read the 32-bit value and merge
-	 * in the desired bits and then write the whole 32-bits back
-	 * out.
-	 */
-	switch (size) {
-	case 1:
-		writeq(where_aligned, pem_pci->pem_reg_base + PEM_CFG_RD);
-		read_val = readq(pem_pci->pem_reg_base + PEM_CFG_RD);
-		read_val >>= 32;
-		mask = ~(0xff << (8 * (where & 3)));
-		read_val &= mask;
-		val = (val & 0xff) << (8 * (where & 3));
-		val |= (u32)read_val;
-		break;
-	case 2:
-		writeq(where_aligned, pem_pci->pem_reg_base + PEM_CFG_RD);
-		read_val = readq(pem_pci->pem_reg_base + PEM_CFG_RD);
-		read_val >>= 32;
-		mask = ~(0xffff << (8 * (where & 3)));
-		read_val &= mask;
-		val = (val & 0xffff) << (8 * (where & 3));
-		val |= (u32)read_val;
-		break;
-	default:
-		break;
-	}
-
-	/*
-	 * By expanding the write width to 32 bits, we may
-	 * inadvertently hit some W1C bits that were not intended to
-	 * be written.  Calculate the mask that must be applied to the
-	 * data to be written to avoid these cases.
-	 */
-	if (mask) {
-		u32 w1c_bits = thunder_pem_bridge_w1c_bits(where);
-
-		if (w1c_bits) {
-			mask &= w1c_bits;
-			val &= ~mask;
-		}
-	}
-
-	/*
-	 * Some bits must be read-only with value of one.  Since the
-	 * access method allows these to be cleared if a zero is
-	 * written, force them to one before writing.
-	 */
-	val |= thunder_pem_bridge_w1_bits(where_aligned);
-
-	/*
-	 * Low order bits are the config address, the high order 32
-	 * bits are the data to be written.
-	 */
-	write_val = (((u64)val) << 32) | where_aligned;
-	writeq(write_val, pem_pci->pem_reg_base + PEM_CFG_WR);
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int thunder_pem_config_write(struct pci_bus *bus, unsigned int devfn,
-				    int where, int size, u32 val)
-{
-	struct pci_config_window *cfg = bus->sysdata;
-
-	if (bus->number < cfg->busr.start ||
-	    bus->number > cfg->busr.end)
-		return PCIBIOS_DEVICE_NOT_FOUND;
-	/*
-	 * The first device on the bus is the PEM PCIe bridge.
-	 * Special case its config access.
-	 */
-	if (bus->number == cfg->busr.start)
-		return thunder_pem_bridge_write(bus, devfn, where, size, val);
-
-
-	return pci_generic_config_write(bus, devfn, where, size, val);
-}
-
-static int thunder_pem_init(struct device *dev, struct pci_config_window *cfg,
-			    struct resource *res_pem)
-{
-	struct thunder_pem_pci *pem_pci;
-	resource_size_t bar4_start;
-
-	pem_pci = devm_kzalloc(dev, sizeof(*pem_pci), GFP_KERNEL);
-	if (!pem_pci)
-		return -ENOMEM;
-
-	pem_pci->pem_reg_base = devm_ioremap(dev, res_pem->start, 0x10000);
-	if (!pem_pci->pem_reg_base)
-		return -ENOMEM;
-
-	/*
-	 * The MSI-X BAR for the PEM and AER interrupts is located at
-	 * a fixed offset from the PEM register base.  Generate a
-	 * fragment of the synthesized Enhanced Allocation capability
-	 * structure here for the BAR.
-	 */
-	bar4_start = res_pem->start + 0xf00000;
-	pem_pci->ea_entry[0] = (u32)bar4_start | 2;
-	pem_pci->ea_entry[1] = (u32)(res_pem->end - bar4_start) & ~3u;
-	pem_pci->ea_entry[2] = (u32)(bar4_start >> 32);
-
-	cfg->priv = pem_pci;
-	return 0;
-}
-
-#if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
-
-#define PEM_RES_BASE		0x87e0c0000000UL
-#define PEM_NODE_MASK		GENMASK(45, 44)
-#define PEM_INDX_MASK		GENMASK(26, 24)
-#define PEM_MIN_DOM_IN_NODE	4
-#define PEM_MAX_DOM_IN_NODE	10
-
-static void thunder_pem_reserve_range(struct device *dev, int seg,
-				      struct resource *r)
-{
-	resource_size_t start = r->start, end = r->end;
-	struct resource *res;
-	const char *regionid;
-
-	regionid = kasprintf(GFP_KERNEL, "PEM RC:%d", seg);
-	if (!regionid)
-		return;
-
-	res = request_mem_region(start, end - start + 1, regionid);
-	if (res)
-		res->flags &= ~IORESOURCE_BUSY;
-	else
-		kfree(regionid);
-
-	dev_info(dev, "%pR %s reserved\n", r,
-		 res ? "has been" : "could not be");
-}
-
-static void thunder_pem_legacy_fw(struct acpi_pci_root *root,
-				 struct resource *res_pem)
-{
-	int node = acpi_get_node(root->device->handle);
-	int index;
-
-	if (node == NUMA_NO_NODE)
-		node = 0;
-
-	index = root->segment - PEM_MIN_DOM_IN_NODE;
-	index -= node * PEM_MAX_DOM_IN_NODE;
-	res_pem->start = PEM_RES_BASE | FIELD_PREP(PEM_NODE_MASK, node) |
-					FIELD_PREP(PEM_INDX_MASK, index);
-	res_pem->flags = IORESOURCE_MEM;
-}
-
-static int thunder_pem_acpi_init(struct pci_config_window *cfg)
-{
-	struct device *dev = cfg->parent;
-	struct acpi_device *adev = to_acpi_device(dev);
-	struct acpi_pci_root *root = acpi_driver_data(adev);
-	struct resource *res_pem;
-	int ret;
-
-	res_pem = devm_kzalloc(&adev->dev, sizeof(*res_pem), GFP_KERNEL);
-	if (!res_pem)
-		return -ENOMEM;
-
-	ret = acpi_get_rc_resources(dev, "CAVA02B", root->segment, res_pem);
-
-	/*
-	 * If we fail to gather resources it means that we run with old
-	 * FW where we need to calculate PEM-specific resources manually.
-	 */
-	if (ret) {
-		thunder_pem_legacy_fw(root, res_pem);
-		/*
-		 * Reserve 64K size PEM specific resources. The full 16M range
-		 * size is required for thunder_pem_init() call.
-		 */
-		res_pem->end = res_pem->start + SZ_64K - 1;
-		thunder_pem_reserve_range(dev, root->segment, res_pem);
-		res_pem->end = res_pem->start + SZ_16M - 1;
-
-		/* Reserve PCI configuration space as well. */
-		thunder_pem_reserve_range(dev, root->segment, &cfg->res);
-	}
-
-	return thunder_pem_init(dev, cfg, res_pem);
-}
-
-struct pci_ecam_ops thunder_pem_ecam_ops = {
-	.bus_shift	= 24,
-	.init		= thunder_pem_acpi_init,
-	.pci_ops	= {
-		.map_bus	= pci_ecam_map_bus,
-		.read		= thunder_pem_config_read,
-		.write		= thunder_pem_config_write,
-	}
-};
-
-#endif
-
-#ifdef CONFIG_PCI_HOST_THUNDER_PEM
-
-static int thunder_pem_platform_init(struct pci_config_window *cfg)
-{
-	struct device *dev = cfg->parent;
-	struct platform_device *pdev = to_platform_device(dev);
-	struct resource *res_pem;
-
-	if (!dev->of_node)
-		return -EINVAL;
-
-	/*
-	 * The second register range is the PEM bridge to the PCIe
-	 * bus.  It has a different config access method than those
-	 * devices behind the bridge.
-	 */
-	res_pem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (!res_pem) {
-		dev_err(dev, "missing \"reg[1]\"property\n");
-		return -EINVAL;
-	}
-
-	return thunder_pem_init(dev, cfg, res_pem);
-}
-
-static struct pci_ecam_ops pci_thunder_pem_ops = {
-	.bus_shift	= 24,
-	.init		= thunder_pem_platform_init,
-	.pci_ops	= {
-		.map_bus	= pci_ecam_map_bus,
-		.read		= thunder_pem_config_read,
-		.write		= thunder_pem_config_write,
-	}
-};
-
-static const struct of_device_id thunder_pem_of_match[] = {
-	{ .compatible = "cavium,pci-host-thunder-pem" },
-	{ },
-};
-
-static int thunder_pem_probe(struct platform_device *pdev)
-{
-	return pci_host_common_probe(pdev, &pci_thunder_pem_ops);
-}
-
-static struct platform_driver thunder_pem_driver = {
-	.driver = {
-		.name = KBUILD_MODNAME,
-		.of_match_table = thunder_pem_of_match,
-		.suppress_bind_attrs = true,
-	},
-	.probe = thunder_pem_probe,
-};
-builtin_platform_driver(thunder_pem_driver);
-
-#endif
-#endif