diff options
Diffstat (limited to 'drivers/pci/host/pci-thunder-ecam.c')
-rw-r--r-- | drivers/pci/host/pci-thunder-ecam.c | 380 |
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 |