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path: root/drivers/pci/host/pci-thunder-ecam.c
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Diffstat (limited to 'drivers/pci/host/pci-thunder-ecam.c')
-rw-r--r--drivers/pci/host/pci-thunder-ecam.c380
1 files changed, 0 insertions, 380 deletions
diff --git a/drivers/pci/host/pci-thunder-ecam.c b/drivers/pci/host/pci-thunder-ecam.c
deleted file mode 100644
index 32d1d7b81ef4..000000000000
--- a/drivers/pci/host/pci-thunder-ecam.c
+++ /dev/null
@@ -1,380 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2015, 2016 Cavium, Inc.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/of_pci.h>
-#include <linux/of.h>
-#include <linux/pci-ecam.h>
-#include <linux/platform_device.h>
-
-#if defined(CONFIG_PCI_HOST_THUNDER_ECAM) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS))
-
-static void set_val(u32 v, int where, int size, u32 *val)
-{
- int shift = (where & 3) * 8;
-
- pr_debug("set_val %04x: %08x\n", (unsigned)(where & ~3), v);
- v >>= shift;
- if (size == 1)
- v &= 0xff;
- else if (size == 2)
- v &= 0xffff;
- *val = v;
-}
-
-static int handle_ea_bar(u32 e0, int bar, struct pci_bus *bus,
- unsigned int devfn, int where, int size, u32 *val)
-{
- void __iomem *addr;
- u32 v;
-
- /* Entries are 16-byte aligned; bits[2,3] select word in entry */
- int where_a = where & 0xc;
-
- if (where_a == 0) {
- set_val(e0, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0x4) {
- addr = bus->ops->map_bus(bus, devfn, bar); /* BAR 0 */
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- v = readl(addr);
- v &= ~0xf;
- v |= 2; /* EA entry-1. Base-L */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0x8) {
- u32 barl_orig;
- u32 barl_rb;
-
- addr = bus->ops->map_bus(bus, devfn, bar); /* BAR 0 */
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- barl_orig = readl(addr + 0);
- writel(0xffffffff, addr + 0);
- barl_rb = readl(addr + 0);
- writel(barl_orig, addr + 0);
- /* zeros in unsettable bits */
- v = ~barl_rb & ~3;
- v |= 0xc; /* EA entry-2. Offset-L */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xc) {
- addr = bus->ops->map_bus(bus, devfn, bar + 4); /* BAR 1 */
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- v = readl(addr); /* EA entry-3. Base-H */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- return PCIBIOS_DEVICE_NOT_FOUND;
-}
-
-static int thunder_ecam_p2_config_read(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 *val)
-{
- struct pci_config_window *cfg = bus->sysdata;
- int where_a = where & ~3;
- void __iomem *addr;
- u32 node_bits;
- u32 v;
-
- /* EA Base[63:32] may be missing some bits ... */
- switch (where_a) {
- case 0xa8:
- case 0xbc:
- case 0xd0:
- case 0xe4:
- break;
- default:
- return pci_generic_config_read(bus, devfn, where, size, val);
- }
-
- addr = bus->ops->map_bus(bus, devfn, where_a);
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- v = readl(addr);
-
- /*
- * Bit 44 of the 64-bit Base must match the same bit in
- * the config space access window. Since we are working with
- * the high-order 32 bits, shift everything down by 32 bits.
- */
- node_bits = (cfg->res.start >> 32) & (1 << 12);
-
- v |= node_bits;
- set_val(v, where, size, val);
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int thunder_ecam_config_read(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 *val)
-{
- u32 v;
- u32 vendor_device;
- u32 class_rev;
- void __iomem *addr;
- int cfg_type;
- int where_a = where & ~3;
-
- addr = bus->ops->map_bus(bus, devfn, 0xc);
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- v = readl(addr);
-
- /* Check for non type-00 header */
- cfg_type = (v >> 16) & 0x7f;
-
- addr = bus->ops->map_bus(bus, devfn, 8);
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- class_rev = readl(addr);
- if (class_rev == 0xffffffff)
- goto no_emulation;
-
- if ((class_rev & 0xff) >= 8) {
- /* Pass-2 handling */
- if (cfg_type)
- goto no_emulation;
- return thunder_ecam_p2_config_read(bus, devfn, where,
- size, val);
- }
-
- /*
- * All BARs have fixed addresses specified by the EA
- * capability; they must return zero on read.
- */
- if (cfg_type == 0 &&
- ((where >= 0x10 && where < 0x2c) ||
- (where >= 0x1a4 && where < 0x1bc))) {
- /* BAR or SR-IOV BAR */
- *val = 0;
- return PCIBIOS_SUCCESSFUL;
- }
-
- addr = bus->ops->map_bus(bus, devfn, 0);
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
-
- vendor_device = readl(addr);
- if (vendor_device == 0xffffffff)
- goto no_emulation;
-
- pr_debug("%04x:%04x - Fix pass#: %08x, where: %03x, devfn: %03x\n",
- vendor_device & 0xffff, vendor_device >> 16, class_rev,
- (unsigned) where, devfn);
-
- /* Check for non type-00 header */
- if (cfg_type == 0) {
- bool has_msix;
- bool is_nic = (vendor_device == 0xa01e177d);
- bool is_tns = (vendor_device == 0xa01f177d);
-
- addr = bus->ops->map_bus(bus, devfn, 0x70);
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- /* E_CAP */
- v = readl(addr);
- has_msix = (v & 0xff00) != 0;
-
- if (!has_msix && where_a == 0x70) {
- v |= 0xbc00; /* next capability is EA at 0xbc */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xb0) {
- addr = bus->ops->map_bus(bus, devfn, where_a);
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- v = readl(addr);
- if (v & 0xff00)
- pr_err("Bad MSIX cap header: %08x\n", v);
- v |= 0xbc00; /* next capability is EA at 0xbc */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xbc) {
- if (is_nic)
- v = 0x40014; /* EA last in chain, 4 entries */
- else if (is_tns)
- v = 0x30014; /* EA last in chain, 3 entries */
- else if (has_msix)
- v = 0x20014; /* EA last in chain, 2 entries */
- else
- v = 0x10014; /* EA last in chain, 1 entry */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a >= 0xc0 && where_a < 0xd0)
- /* EA entry-0. PP=0, BAR0 Size:3 */
- return handle_ea_bar(0x80ff0003,
- 0x10, bus, devfn, where,
- size, val);
- if (where_a >= 0xd0 && where_a < 0xe0 && has_msix)
- /* EA entry-1. PP=0, BAR4 Size:3 */
- return handle_ea_bar(0x80ff0043,
- 0x20, bus, devfn, where,
- size, val);
- if (where_a >= 0xe0 && where_a < 0xf0 && is_tns)
- /* EA entry-2. PP=0, BAR2, Size:3 */
- return handle_ea_bar(0x80ff0023,
- 0x18, bus, devfn, where,
- size, val);
- if (where_a >= 0xe0 && where_a < 0xf0 && is_nic)
- /* EA entry-2. PP=4, VF_BAR0 (9), Size:3 */
- return handle_ea_bar(0x80ff0493,
- 0x1a4, bus, devfn, where,
- size, val);
- if (where_a >= 0xf0 && where_a < 0x100 && is_nic)
- /* EA entry-3. PP=4, VF_BAR4 (d), Size:3 */
- return handle_ea_bar(0x80ff04d3,
- 0x1b4, bus, devfn, where,
- size, val);
- } else if (cfg_type == 1) {
- bool is_rsl_bridge = devfn == 0x08;
- bool is_rad_bridge = devfn == 0xa0;
- bool is_zip_bridge = devfn == 0xa8;
- bool is_dfa_bridge = devfn == 0xb0;
- bool is_nic_bridge = devfn == 0x10;
-
- if (where_a == 0x70) {
- addr = bus->ops->map_bus(bus, devfn, where_a);
- if (!addr) {
- *val = ~0;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- v = readl(addr);
- if (v & 0xff00)
- pr_err("Bad PCIe cap header: %08x\n", v);
- v |= 0xbc00; /* next capability is EA at 0xbc */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xbc) {
- if (is_nic_bridge)
- v = 0x10014; /* EA last in chain, 1 entry */
- else
- v = 0x00014; /* EA last in chain, no entries */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xc0) {
- if (is_rsl_bridge || is_nic_bridge)
- v = 0x0101; /* subordinate:secondary = 1:1 */
- else if (is_rad_bridge)
- v = 0x0202; /* subordinate:secondary = 2:2 */
- else if (is_zip_bridge)
- v = 0x0303; /* subordinate:secondary = 3:3 */
- else if (is_dfa_bridge)
- v = 0x0404; /* subordinate:secondary = 4:4 */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xc4 && is_nic_bridge) {
- /* Enabled, not-Write, SP=ff, PP=05, BEI=6, ES=4 */
- v = 0x80ff0564;
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xc8 && is_nic_bridge) {
- v = 0x00000002; /* Base-L 64-bit */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xcc && is_nic_bridge) {
- v = 0xfffffffe; /* MaxOffset-L 64-bit */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xd0 && is_nic_bridge) {
- v = 0x00008430; /* NIC Base-H */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- if (where_a == 0xd4 && is_nic_bridge) {
- v = 0x0000000f; /* MaxOffset-H */
- set_val(v, where, size, val);
- return PCIBIOS_SUCCESSFUL;
- }
- }
-no_emulation:
- return pci_generic_config_read(bus, devfn, where, size, val);
-}
-
-static int thunder_ecam_config_write(struct pci_bus *bus, unsigned int devfn,
- int where, int size, u32 val)
-{
- /*
- * All BARs have fixed addresses; ignore BAR writes so they
- * don't get corrupted.
- */
- if ((where >= 0x10 && where < 0x2c) ||
- (where >= 0x1a4 && where < 0x1bc))
- /* BAR or SR-IOV BAR */
- return PCIBIOS_SUCCESSFUL;
-
- return pci_generic_config_write(bus, devfn, where, size, val);
-}
-
-struct pci_ecam_ops pci_thunder_ecam_ops = {
- .bus_shift = 20,
- .pci_ops = {
- .map_bus = pci_ecam_map_bus,
- .read = thunder_ecam_config_read,
- .write = thunder_ecam_config_write,
- }
-};
-
-#ifdef CONFIG_PCI_HOST_THUNDER_ECAM
-
-static const struct of_device_id thunder_ecam_of_match[] = {
- { .compatible = "cavium,pci-host-thunder-ecam" },
- { },
-};
-
-static int thunder_ecam_probe(struct platform_device *pdev)
-{
- return pci_host_common_probe(pdev, &pci_thunder_ecam_ops);
-}
-
-static struct platform_driver thunder_ecam_driver = {
- .driver = {
- .name = KBUILD_MODNAME,
- .of_match_table = thunder_ecam_of_match,
- .suppress_bind_attrs = true,
- },
- .probe = thunder_ecam_probe,
-};
-builtin_platform_driver(thunder_ecam_driver);
-
-#endif
-#endif
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