Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1 | /* |
Stefan Reinauer | 7e61e45 | 2008-01-18 10:35:56 +0000 | [diff] [blame] | 2 | * This file is part of the coreboot project. |
Uwe Hermann | b80dbf0 | 2007-04-22 19:08:13 +0000 | [diff] [blame] | 3 | * |
Martin Roth | bb5953d | 2016-04-11 20:53:39 -0600 | [diff] [blame] | 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; version 2 of the License. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
Uwe Hermann | b80dbf0 | 2007-04-22 19:08:13 +0000 | [diff] [blame] | 12 | */ |
| 13 | |
| 14 | /* |
Martin Roth | 99f83bb | 2019-09-15 20:57:18 -0700 | [diff] [blame] | 15 | * Originally based on the Linux kernel (drivers/pci/pci.c). |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 16 | * PCI Bus Services, see include/linux/pci.h for further explanation. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 17 | */ |
| 18 | |
Edward O'Callaghan | 6c99250 | 2014-06-20 21:19:06 +1000 | [diff] [blame] | 19 | #include <arch/acpi.h> |
Kyösti Mälkki | f1b58b7 | 2019-03-01 13:43:02 +0200 | [diff] [blame] | 20 | #include <device/pci_ops.h> |
Edward O'Callaghan | 6c99250 | 2014-06-20 21:19:06 +1000 | [diff] [blame] | 21 | #include <bootmode.h> |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 22 | #include <console/console.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <stdint.h> |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 25 | #include <string.h> |
Edward O'Callaghan | 6c99250 | 2014-06-20 21:19:06 +1000 | [diff] [blame] | 26 | #include <delay.h> |
Edward O'Callaghan | 6c99250 | 2014-06-20 21:19:06 +1000 | [diff] [blame] | 27 | #include <device/cardbus.h> |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 28 | #include <device/device.h> |
| 29 | #include <device/pci.h> |
| 30 | #include <device/pci_ids.h> |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 31 | #include <device/pcix.h> |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 32 | #include <device/pciexp.h> |
Edward O'Callaghan | 6c99250 | 2014-06-20 21:19:06 +1000 | [diff] [blame] | 33 | #include <device/hypertransport.h> |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 34 | #include <pc80/i8259.h> |
Philipp Deppenwiese | fea2429 | 2017-10-17 17:02:29 +0200 | [diff] [blame] | 35 | #include <security/vboot/vbnv.h> |
Martin Roth | 5dd4a2a | 2018-03-06 16:10:45 -0700 | [diff] [blame] | 36 | #include <timestamp.h> |
Johanna Schander | db7a3ae | 2019-07-24 10:14:26 +0200 | [diff] [blame] | 37 | #include <types.h> |
| 38 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 39 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 40 | u8 pci_moving_config8(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 41 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 42 | u8 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 43 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 44 | value = pci_read_config8(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 45 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 46 | pci_write_config8(dev, reg, 0xff); |
| 47 | ones = pci_read_config8(dev, reg); |
| 48 | |
| 49 | pci_write_config8(dev, reg, 0x00); |
| 50 | zeroes = pci_read_config8(dev, reg); |
| 51 | |
| 52 | pci_write_config8(dev, reg, value); |
| 53 | |
| 54 | return ones ^ zeroes; |
| 55 | } |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 56 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 57 | u16 pci_moving_config16(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 58 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 59 | u16 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 60 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 61 | value = pci_read_config16(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 62 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 63 | pci_write_config16(dev, reg, 0xffff); |
| 64 | ones = pci_read_config16(dev, reg); |
| 65 | |
| 66 | pci_write_config16(dev, reg, 0x0000); |
| 67 | zeroes = pci_read_config16(dev, reg); |
| 68 | |
| 69 | pci_write_config16(dev, reg, value); |
| 70 | |
| 71 | return ones ^ zeroes; |
| 72 | } |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 73 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 74 | u32 pci_moving_config32(struct device *dev, unsigned int reg) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 75 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 76 | u32 value, ones, zeroes; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 77 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 78 | value = pci_read_config32(dev, reg); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 79 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 80 | pci_write_config32(dev, reg, 0xffffffff); |
| 81 | ones = pci_read_config32(dev, reg); |
| 82 | |
| 83 | pci_write_config32(dev, reg, 0x00000000); |
| 84 | zeroes = pci_read_config32(dev, reg); |
| 85 | |
| 86 | pci_write_config32(dev, reg, value); |
| 87 | |
| 88 | return ones ^ zeroes; |
| 89 | } |
| 90 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 91 | /** |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 92 | * Given a device and register, read the size of the BAR for that register. |
| 93 | * |
| 94 | * @param dev Pointer to the device structure. |
| 95 | * @param index Address of the PCI configuration register. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 96 | * @return TODO |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 97 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 98 | struct resource *pci_get_resource(struct device *dev, unsigned long index) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 99 | { |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 100 | struct resource *resource; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 101 | unsigned long value, attr; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 102 | resource_t moving, limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 103 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 104 | /* Initialize the resources to nothing. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 105 | resource = new_resource(dev, index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 106 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 107 | /* Get the initial value. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 108 | value = pci_read_config32(dev, index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 109 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 110 | /* See which bits move. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 111 | moving = pci_moving_config32(dev, index); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 112 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 113 | /* Initialize attr to the bits that do not move. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 114 | attr = value & ~moving; |
| 115 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 116 | /* If it is a 64bit resource look at the high half as well. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 117 | if (((attr & PCI_BASE_ADDRESS_SPACE_IO) == 0) && |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 118 | ((attr & PCI_BASE_ADDRESS_MEM_LIMIT_MASK) == |
| 119 | PCI_BASE_ADDRESS_MEM_LIMIT_64)) { |
| 120 | /* Find the high bits that move. */ |
| 121 | moving |= |
| 122 | ((resource_t) pci_moving_config32(dev, index + 4)) << 32; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 123 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 124 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 125 | /* Find the resource constraints. |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 126 | * Start by finding the bits that move. From there: |
| 127 | * - Size is the least significant bit of the bits that move. |
| 128 | * - Limit is all of the bits that move plus all of the lower bits. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 129 | * See PCI Spec 6.2.5.1. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 130 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 131 | limit = 0; |
| 132 | if (moving) { |
| 133 | resource->size = 1; |
| 134 | resource->align = resource->gran = 0; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 135 | while (!(moving & resource->size)) { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 136 | resource->size <<= 1; |
| 137 | resource->align += 1; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 138 | resource->gran += 1; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 139 | } |
| 140 | resource->limit = limit = moving | (resource->size - 1); |
Nico Huber | 8193b06 | 2015-10-21 15:43:41 +0200 | [diff] [blame] | 141 | |
| 142 | if (pci_base_address_is_memory_space(attr)) { |
| 143 | /* Page-align to allow individual mapping of devices. */ |
| 144 | if (resource->align < 12) |
| 145 | resource->align = 12; |
| 146 | } |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 147 | } |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 148 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 149 | /* |
| 150 | * Some broken hardware has read-only registers that do not |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 151 | * really size correctly. |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 152 | * |
| 153 | * Example: the Acer M7229 has BARs 1-4 normally read-only, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 154 | * so BAR1 at offset 0x10 reads 0x1f1. If you size that register |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 155 | * by writing 0xffffffff to it, it will read back as 0x1f1 -- which |
| 156 | * is a violation of the spec. |
| 157 | * |
| 158 | * We catch this case and ignore it by observing which bits move. |
| 159 | * |
| 160 | * This also catches the common case of unimplemented registers |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 161 | * that always read back as 0. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 162 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 163 | if (moving == 0) { |
| 164 | if (value != 0) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 165 | printk(BIOS_DEBUG, "%s register %02lx(%08lx), " |
| 166 | "read-only ignoring it\n", |
| 167 | dev_path(dev), index, value); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 168 | } |
| 169 | resource->flags = 0; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 170 | } else if (attr & PCI_BASE_ADDRESS_SPACE_IO) { |
| 171 | /* An I/O mapped base address. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 172 | resource->flags |= IORESOURCE_IO; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 173 | /* I don't want to deal with 32bit I/O resources. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 174 | resource->limit = 0xffff; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 175 | } else { |
| 176 | /* A Memory mapped base address. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 177 | attr &= PCI_BASE_ADDRESS_MEM_ATTR_MASK; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 178 | resource->flags |= IORESOURCE_MEM; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 179 | if (attr & PCI_BASE_ADDRESS_MEM_PREFETCH) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 180 | resource->flags |= IORESOURCE_PREFETCH; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 181 | attr &= PCI_BASE_ADDRESS_MEM_LIMIT_MASK; |
| 182 | if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_32) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 183 | /* 32bit limit. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 184 | resource->limit = 0xffffffffUL; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 185 | } else if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_1M) { |
| 186 | /* 1MB limit. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 187 | resource->limit = 0x000fffffUL; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 188 | } else if (attr == PCI_BASE_ADDRESS_MEM_LIMIT_64) { |
| 189 | /* 64bit limit. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 190 | resource->limit = 0xffffffffffffffffULL; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 191 | resource->flags |= IORESOURCE_PCI64; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 192 | } else { |
| 193 | /* Invalid value. */ |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 194 | printk(BIOS_ERR, "Broken BAR with value %lx\n", attr); |
| 195 | printk(BIOS_ERR, " on dev %s at index %02lx\n", |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 196 | dev_path(dev), index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 197 | resource->flags = 0; |
| 198 | } |
| 199 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 200 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 201 | /* Don't let the limit exceed which bits can move. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 202 | if (resource->limit > limit) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 203 | resource->limit = limit; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 204 | |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 205 | return resource; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 206 | } |
| 207 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 208 | /** |
| 209 | * Given a device and an index, read the size of the BAR for that register. |
| 210 | * |
| 211 | * @param dev Pointer to the device structure. |
| 212 | * @param index Address of the PCI configuration register. |
| 213 | */ |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 214 | static void pci_get_rom_resource(struct device *dev, unsigned long index) |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 215 | { |
| 216 | struct resource *resource; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 217 | unsigned long value; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 218 | resource_t moving; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 219 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 220 | /* Initialize the resources to nothing. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 221 | resource = new_resource(dev, index); |
| 222 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 223 | /* Get the initial value. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 224 | value = pci_read_config32(dev, index); |
| 225 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 226 | /* See which bits move. */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 227 | moving = pci_moving_config32(dev, index); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 228 | |
| 229 | /* Clear the Enable bit. */ |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 230 | moving = moving & ~PCI_ROM_ADDRESS_ENABLE; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 231 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 232 | /* Find the resource constraints. |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 233 | * Start by finding the bits that move. From there: |
| 234 | * - Size is the least significant bit of the bits that move. |
| 235 | * - Limit is all of the bits that move plus all of the lower bits. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 236 | * See PCI Spec 6.2.5.1. |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 237 | */ |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 238 | if (moving) { |
| 239 | resource->size = 1; |
| 240 | resource->align = resource->gran = 0; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 241 | while (!(moving & resource->size)) { |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 242 | resource->size <<= 1; |
| 243 | resource->align += 1; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 244 | resource->gran += 1; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 245 | } |
Patrick Georgi | 16cdbb2 | 2009-04-21 20:14:31 +0000 | [diff] [blame] | 246 | resource->limit = moving | (resource->size - 1); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 247 | resource->flags |= IORESOURCE_MEM | IORESOURCE_READONLY; |
| 248 | } else { |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 249 | if (value != 0) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 250 | printk(BIOS_DEBUG, "%s register %02lx(%08lx), " |
| 251 | "read-only ignoring it\n", |
| 252 | dev_path(dev), index, value); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 253 | } |
| 254 | resource->flags = 0; |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 255 | } |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 256 | compact_resources(dev); |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 257 | } |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 258 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 259 | /** |
Patrick Rudolph | 4e2f95b | 2018-05-16 14:56:22 +0200 | [diff] [blame] | 260 | * Given a device, read the size of the MSI-X table. |
| 261 | * |
| 262 | * @param dev Pointer to the device structure. |
| 263 | * @return MSI-X table size or 0 if not MSI-X capable device |
| 264 | */ |
| 265 | size_t pci_msix_table_size(struct device *dev) |
| 266 | { |
| 267 | const size_t pos = pci_find_capability(dev, PCI_CAP_ID_MSIX); |
| 268 | if (!pos) |
| 269 | return 0; |
| 270 | |
| 271 | const u16 control = pci_read_config16(dev, pos + PCI_MSIX_FLAGS); |
| 272 | return (control & PCI_MSIX_FLAGS_QSIZE) + 1; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * Given a device, return the table offset and bar the MSI-X tables resides in. |
| 277 | * |
| 278 | * @param dev Pointer to the device structure. |
| 279 | * @param offset Returned value gives the offset in bytes inside the PCI BAR. |
| 280 | * @param idx The returned value is the index of the PCI_BASE_ADDRESS register |
| 281 | * the MSI-X table is located in. |
| 282 | * @return Zero on success |
| 283 | */ |
| 284 | int pci_msix_table_bar(struct device *dev, u32 *offset, u8 *idx) |
| 285 | { |
| 286 | const size_t pos = pci_find_capability(dev, PCI_CAP_ID_MSIX); |
| 287 | if (!pos || !offset || !idx) |
| 288 | return 1; |
| 289 | |
| 290 | *offset = pci_read_config32(dev, pos + PCI_MSIX_TABLE); |
| 291 | *idx = (u8)(*offset & PCI_MSIX_PBA_BIR); |
| 292 | *offset &= PCI_MSIX_PBA_OFFSET; |
| 293 | |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Given a device, return a msix_entry pointer or NULL if no table was found. |
| 299 | * |
| 300 | * @param dev Pointer to the device structure. |
| 301 | * |
| 302 | * @return NULL on error |
| 303 | */ |
| 304 | struct msix_entry *pci_msix_get_table(struct device *dev) |
| 305 | { |
| 306 | struct resource *res; |
| 307 | u32 offset; |
| 308 | u8 idx; |
| 309 | |
| 310 | if (pci_msix_table_bar(dev, &offset, &idx)) |
| 311 | return NULL; |
| 312 | |
| 313 | if (idx > 5) |
| 314 | return NULL; |
| 315 | |
| 316 | res = probe_resource(dev, idx * 4 + PCI_BASE_ADDRESS_0); |
| 317 | if (!res || !res->base || offset >= res->size) |
| 318 | return NULL; |
| 319 | |
| 320 | if ((res->flags & IORESOURCE_PCI64) && |
| 321 | (uintptr_t)res->base != res->base) |
| 322 | return NULL; |
| 323 | |
| 324 | return (struct msix_entry *)((uintptr_t)res->base + offset); |
| 325 | } |
| 326 | |
| 327 | /** |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 328 | * Read the base address registers for a given device. |
| 329 | * |
| 330 | * @param dev Pointer to the dev structure. |
| 331 | * @param howmany How many registers to read (6 for device, 2 for bridge). |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 332 | */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 333 | static void pci_read_bases(struct device *dev, unsigned int howmany) |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 334 | { |
| 335 | unsigned long index; |
| 336 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 337 | for (index = PCI_BASE_ADDRESS_0; |
| 338 | (index < PCI_BASE_ADDRESS_0 + (howmany << 2));) { |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 339 | struct resource *resource; |
| 340 | resource = pci_get_resource(dev, index); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 341 | index += (resource->flags & IORESOURCE_PCI64) ? 8 : 4; |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 342 | } |
Li-Ta Lo | e8b1c9d | 2004-12-27 04:25:41 +0000 | [diff] [blame] | 343 | |
| 344 | compact_resources(dev); |
Li-Ta Lo | 9a5b496 | 2004-12-23 21:48:01 +0000 | [diff] [blame] | 345 | } |
| 346 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 347 | static void pci_record_bridge_resource(struct device *dev, resource_t moving, |
Martin Roth | 38ddbfb | 2019-10-23 21:41:00 -0600 | [diff] [blame] | 348 | unsigned int index, unsigned long type) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 349 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 350 | struct resource *resource; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 351 | unsigned long gran; |
| 352 | resource_t step; |
| 353 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 354 | resource = NULL; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 355 | |
| 356 | if (!moving) |
| 357 | return; |
| 358 | |
| 359 | /* Initialize the constraints on the current bus. */ |
| 360 | resource = new_resource(dev, index); |
| 361 | resource->size = 0; |
| 362 | gran = 0; |
| 363 | step = 1; |
| 364 | while ((moving & step) == 0) { |
| 365 | gran += 1; |
| 366 | step <<= 1; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 367 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 368 | resource->gran = gran; |
| 369 | resource->align = gran; |
| 370 | resource->limit = moving | (step - 1); |
| 371 | resource->flags = type | IORESOURCE_PCI_BRIDGE | |
| 372 | IORESOURCE_BRIDGE; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 373 | } |
| 374 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 375 | static void pci_bridge_read_bases(struct device *dev) |
| 376 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 377 | resource_t moving_base, moving_limit, moving; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 378 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 379 | /* See if the bridge I/O resources are implemented. */ |
| 380 | moving_base = ((u32) pci_moving_config8(dev, PCI_IO_BASE)) << 8; |
| 381 | moving_base |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 382 | ((u32) pci_moving_config16(dev, PCI_IO_BASE_UPPER16)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 383 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 384 | moving_limit = ((u32) pci_moving_config8(dev, PCI_IO_LIMIT)) << 8; |
| 385 | moving_limit |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 386 | ((u32) pci_moving_config16(dev, PCI_IO_LIMIT_UPPER16)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 387 | |
| 388 | moving = moving_base & moving_limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 389 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 390 | /* Initialize the I/O space constraints on the current bus. */ |
| 391 | pci_record_bridge_resource(dev, moving, PCI_IO_BASE, IORESOURCE_IO); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 392 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 393 | /* See if the bridge prefmem resources are implemented. */ |
| 394 | moving_base = |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 395 | ((resource_t) pci_moving_config16(dev, PCI_PREF_MEMORY_BASE)) << 16; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 396 | moving_base |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 397 | ((resource_t) pci_moving_config32(dev, PCI_PREF_BASE_UPPER32)) << 32; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 398 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 399 | moving_limit = |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 400 | ((resource_t) pci_moving_config16(dev, PCI_PREF_MEMORY_LIMIT)) << 16; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 401 | moving_limit |= |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 402 | ((resource_t) pci_moving_config32(dev, PCI_PREF_LIMIT_UPPER32)) << 32; |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 403 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 404 | moving = moving_base & moving_limit; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 405 | /* Initialize the prefetchable memory constraints on the current bus. */ |
| 406 | pci_record_bridge_resource(dev, moving, PCI_PREF_MEMORY_BASE, |
| 407 | IORESOURCE_MEM | IORESOURCE_PREFETCH); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 408 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 409 | /* See if the bridge mem resources are implemented. */ |
| 410 | moving_base = ((u32) pci_moving_config16(dev, PCI_MEMORY_BASE)) << 16; |
| 411 | moving_limit = ((u32) pci_moving_config16(dev, PCI_MEMORY_LIMIT)) << 16; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 412 | |
| 413 | moving = moving_base & moving_limit; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 414 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 415 | /* Initialize the memory resources on the current bus. */ |
| 416 | pci_record_bridge_resource(dev, moving, PCI_MEMORY_BASE, |
| 417 | IORESOURCE_MEM); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 418 | |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 419 | compact_resources(dev); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 420 | } |
| 421 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 422 | void pci_dev_read_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 423 | { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 424 | pci_read_bases(dev, 6); |
| 425 | pci_get_rom_resource(dev, PCI_ROM_ADDRESS); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 426 | } |
| 427 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 428 | void pci_bus_read_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 429 | { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 430 | pci_bridge_read_bases(dev); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 431 | pci_read_bases(dev, 2); |
| 432 | pci_get_rom_resource(dev, PCI_ROM_ADDRESS1); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 433 | } |
| 434 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 435 | void pci_domain_read_resources(struct device *dev) |
| 436 | { |
| 437 | struct resource *res; |
| 438 | |
| 439 | /* Initialize the system-wide I/O space constraints. */ |
| 440 | res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); |
| 441 | res->limit = 0xffffUL; |
| 442 | res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | |
| 443 | IORESOURCE_ASSIGNED; |
| 444 | |
| 445 | /* Initialize the system-wide memory resources constraints. */ |
| 446 | res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); |
| 447 | res->limit = 0xffffffffULL; |
| 448 | res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | |
| 449 | IORESOURCE_ASSIGNED; |
| 450 | } |
| 451 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 452 | static void pci_set_resource(struct device *dev, struct resource *resource) |
| 453 | { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 454 | resource_t base, end; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 455 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 456 | /* Make certain the resource has actually been assigned a value. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 457 | if (!(resource->flags & IORESOURCE_ASSIGNED)) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 458 | printk(BIOS_ERR, "ERROR: %s %02lx %s size: 0x%010llx not " |
| 459 | "assigned\n", dev_path(dev), resource->index, |
| 460 | resource_type(resource), resource->size); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 461 | return; |
| 462 | } |
| 463 | |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 464 | /* If this resource is fixed don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 465 | if (resource->flags & IORESOURCE_FIXED) |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 466 | return; |
Myles Watson | eb81a5b | 2009-11-05 20:06:19 +0000 | [diff] [blame] | 467 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 468 | /* If I have already stored this resource don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 469 | if (resource->flags & IORESOURCE_STORED) |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 470 | return; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 471 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 472 | /* If the resource is subtractive don't worry about it. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 473 | if (resource->flags & IORESOURCE_SUBTRACTIVE) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 474 | return; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 475 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 476 | /* Only handle PCI memory and I/O resources for now. */ |
| 477 | if (!(resource->flags & (IORESOURCE_MEM | IORESOURCE_IO))) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 478 | return; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 479 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 480 | /* Enable the resources in the command register. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 481 | if (resource->size) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 482 | if (resource->flags & IORESOURCE_MEM) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 483 | dev->command |= PCI_COMMAND_MEMORY; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 484 | if (resource->flags & IORESOURCE_IO) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 485 | dev->command |= PCI_COMMAND_IO; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 486 | if (resource->flags & IORESOURCE_PCI_BRIDGE) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 487 | dev->command |= PCI_COMMAND_MASTER; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 488 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 489 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 490 | /* Get the base address. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 491 | base = resource->base; |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 492 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 493 | /* Get the end. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 494 | end = resource_end(resource); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 495 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 496 | /* Now store the resource. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 497 | resource->flags |= IORESOURCE_STORED; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 498 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 499 | /* |
| 500 | * PCI bridges have no enable bit. They are disabled if the base of |
| 501 | * the range is greater than the limit. If the size is zero, disable |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 502 | * by setting the base = limit and end = limit - 2^gran. |
| 503 | */ |
| 504 | if (resource->size == 0 && (resource->flags & IORESOURCE_PCI_BRIDGE)) { |
| 505 | base = resource->limit; |
| 506 | end = resource->limit - (1 << resource->gran); |
| 507 | resource->base = base; |
| 508 | } |
| 509 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 510 | if (!(resource->flags & IORESOURCE_PCI_BRIDGE)) { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 511 | unsigned long base_lo, base_hi; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 512 | |
| 513 | /* |
| 514 | * Some chipsets allow us to set/clear the I/O bit |
| 515 | * (e.g. VIA 82C686A). So set it to be safe. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 516 | */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 517 | base_lo = base & 0xffffffff; |
| 518 | base_hi = (base >> 32) & 0xffffffff; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 519 | if (resource->flags & IORESOURCE_IO) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 520 | base_lo |= PCI_BASE_ADDRESS_SPACE_IO; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 521 | pci_write_config32(dev, resource->index, base_lo); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 522 | if (resource->flags & IORESOURCE_PCI64) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 523 | pci_write_config32(dev, resource->index + 4, base_hi); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 524 | } else if (resource->index == PCI_IO_BASE) { |
| 525 | /* Set the I/O ranges. */ |
| 526 | pci_write_config8(dev, PCI_IO_BASE, base >> 8); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 527 | pci_write_config16(dev, PCI_IO_BASE_UPPER16, base >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 528 | pci_write_config8(dev, PCI_IO_LIMIT, end >> 8); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 529 | pci_write_config16(dev, PCI_IO_LIMIT_UPPER16, end >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 530 | } else if (resource->index == PCI_MEMORY_BASE) { |
| 531 | /* Set the memory range. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 532 | pci_write_config16(dev, PCI_MEMORY_BASE, base >> 16); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 533 | pci_write_config16(dev, PCI_MEMORY_LIMIT, end >> 16); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 534 | } else if (resource->index == PCI_PREF_MEMORY_BASE) { |
| 535 | /* Set the prefetchable memory range. */ |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 536 | pci_write_config16(dev, PCI_PREF_MEMORY_BASE, base >> 16); |
| 537 | pci_write_config32(dev, PCI_PREF_BASE_UPPER32, base >> 32); |
| 538 | pci_write_config16(dev, PCI_PREF_MEMORY_LIMIT, end >> 16); |
| 539 | pci_write_config32(dev, PCI_PREF_LIMIT_UPPER32, end >> 32); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 540 | } else { |
| 541 | /* Don't let me think I stored the resource. */ |
Eric Biederman | 5cd8173 | 2004-03-11 15:01:31 +0000 | [diff] [blame] | 542 | resource->flags &= ~IORESOURCE_STORED; |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 543 | printk(BIOS_ERR, "ERROR: invalid resource->index %lx\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 544 | resource->index); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 545 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 546 | |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 547 | report_resource_stored(dev, resource, ""); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 548 | } |
| 549 | |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 550 | void pci_dev_set_resources(struct device *dev) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 551 | { |
Myles Watson | c25cc11 | 2010-05-21 14:33:48 +0000 | [diff] [blame] | 552 | struct resource *res; |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 553 | struct bus *bus; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 554 | u8 line; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 555 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 556 | for (res = dev->resource_list; res; res = res->next) |
Myles Watson | c25cc11 | 2010-05-21 14:33:48 +0000 | [diff] [blame] | 557 | pci_set_resource(dev, res); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 558 | |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 559 | for (bus = dev->link_list; bus; bus = bus->next) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 560 | if (bus->children) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 561 | assign_resources(bus); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 562 | } |
| 563 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 564 | /* Set a default latency timer. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 565 | pci_write_config8(dev, PCI_LATENCY_TIMER, 0x40); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 566 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 567 | /* Set a default secondary latency timer. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 568 | if ((dev->hdr_type & 0x7f) == PCI_HEADER_TYPE_BRIDGE) |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 569 | pci_write_config8(dev, PCI_SEC_LATENCY_TIMER, 0x40); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 570 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 571 | /* Zero the IRQ settings. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 572 | line = pci_read_config8(dev, PCI_INTERRUPT_PIN); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 573 | if (line) |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 574 | pci_write_config8(dev, PCI_INTERRUPT_LINE, 0); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 575 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 576 | /* Set the cache line size, so far 64 bytes is good for everyone. */ |
Eric Biederman | 7a5416a | 2003-06-12 19:23:51 +0000 | [diff] [blame] | 577 | pci_write_config8(dev, PCI_CACHE_LINE_SIZE, 64 >> 2); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 578 | } |
| 579 | |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 580 | void pci_dev_enable_resources(struct device *dev) |
| 581 | { |
Kyösti Mälkki | cac0231 | 2019-06-30 08:40:04 +0300 | [diff] [blame] | 582 | const struct pci_operations *ops = NULL; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 583 | u16 command; |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 584 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 585 | /* Set the subsystem vendor and device ID for mainboard devices. */ |
Kyösti Mälkki | cac0231 | 2019-06-30 08:40:04 +0300 | [diff] [blame] | 586 | if (dev->ops) |
| 587 | ops = dev->ops->ops_pci; |
Eric Biederman | dbec2d4 | 2004-10-21 10:44:08 +0000 | [diff] [blame] | 588 | if (dev->on_mainboard && ops && ops->set_subsystem) { |
Duncan Laurie | 7e1c83e | 2013-08-09 07:55:10 -0700 | [diff] [blame] | 589 | if (CONFIG_SUBSYSTEM_VENDOR_ID) |
| 590 | dev->subsystem_vendor = CONFIG_SUBSYSTEM_VENDOR_ID; |
Rizwan Qureshi | fd89129 | 2017-04-26 21:00:37 +0530 | [diff] [blame] | 591 | else if (!dev->subsystem_vendor) |
| 592 | dev->subsystem_vendor = pci_read_config16(dev, |
| 593 | PCI_VENDOR_ID); |
Duncan Laurie | 7e1c83e | 2013-08-09 07:55:10 -0700 | [diff] [blame] | 594 | if (CONFIG_SUBSYSTEM_DEVICE_ID) |
| 595 | dev->subsystem_device = CONFIG_SUBSYSTEM_DEVICE_ID; |
Rizwan Qureshi | fd89129 | 2017-04-26 21:00:37 +0530 | [diff] [blame] | 596 | else if (!dev->subsystem_device) |
| 597 | dev->subsystem_device = pci_read_config16(dev, |
| 598 | PCI_DEVICE_ID); |
| 599 | |
Sven Schnelle | 9132102 | 2011-03-01 19:58:47 +0000 | [diff] [blame] | 600 | printk(BIOS_DEBUG, "%s subsystem <- %04x/%04x\n", |
| 601 | dev_path(dev), dev->subsystem_vendor, |
| 602 | dev->subsystem_device); |
| 603 | ops->set_subsystem(dev, dev->subsystem_vendor, |
| 604 | dev->subsystem_device); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 605 | } |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 606 | command = pci_read_config16(dev, PCI_COMMAND); |
| 607 | command |= dev->command; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 608 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 609 | /* v3 has |
| 610 | * command |= (PCI_COMMAND_PARITY + PCI_COMMAND_SERR); // Error check. |
| 611 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 612 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 613 | printk(BIOS_DEBUG, "%s cmd <- %02x\n", dev_path(dev), command); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 614 | pci_write_config16(dev, PCI_COMMAND, command); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | void pci_bus_enable_resources(struct device *dev) |
| 618 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 619 | u16 ctrl; |
| 620 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 621 | /* |
| 622 | * Enable I/O in command register if there is VGA card |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 623 | * connected with (even it does not claim I/O resource). |
| 624 | */ |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 625 | if (dev->link_list->bridge_ctrl & PCI_BRIDGE_CTL_VGA) |
Li-Ta Lo | 515f6c7 | 2005-01-11 22:48:54 +0000 | [diff] [blame] | 626 | dev->command |= PCI_COMMAND_IO; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 627 | ctrl = pci_read_config16(dev, PCI_BRIDGE_CONTROL); |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 628 | ctrl |= dev->link_list->bridge_ctrl; |
Kyösti Mälkki | 382e216 | 2019-09-21 16:19:32 +0300 | [diff] [blame] | 629 | ctrl |= (PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR); /* Error check. */ |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 630 | printk(BIOS_DEBUG, "%s bridge ctrl <- %04x\n", dev_path(dev), ctrl); |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 631 | pci_write_config16(dev, PCI_BRIDGE_CONTROL, ctrl); |
| 632 | |
| 633 | pci_dev_enable_resources(dev); |
| 634 | } |
| 635 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 636 | void pci_bus_reset(struct bus *bus) |
| 637 | { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 638 | u16 ctl; |
| 639 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 640 | ctl = pci_read_config16(bus->dev, PCI_BRIDGE_CONTROL); |
| 641 | ctl |= PCI_BRIDGE_CTL_BUS_RESET; |
| 642 | pci_write_config16(bus->dev, PCI_BRIDGE_CONTROL, ctl); |
| 643 | mdelay(10); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 644 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 645 | ctl &= ~PCI_BRIDGE_CTL_BUS_RESET; |
| 646 | pci_write_config16(bus->dev, PCI_BRIDGE_CONTROL, ctl); |
| 647 | delay(1); |
| 648 | } |
| 649 | |
Elyes HAOUAS | 88030b7 | 2018-09-20 17:26:10 +0200 | [diff] [blame] | 650 | void pci_dev_set_subsystem(struct device *dev, unsigned int vendor, |
| 651 | unsigned int device) |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 652 | { |
Subrata Banik | 9514d47 | 2019-03-20 14:56:27 +0530 | [diff] [blame] | 653 | uint8_t offset; |
| 654 | |
| 655 | /* Header type */ |
| 656 | switch (dev->hdr_type & 0x7f) { |
| 657 | case PCI_HEADER_TYPE_NORMAL: |
| 658 | offset = PCI_SUBSYSTEM_VENDOR_ID; |
| 659 | break; |
| 660 | case PCI_HEADER_TYPE_BRIDGE: |
| 661 | offset = pci_find_capability(dev, PCI_CAP_ID_SSVID); |
| 662 | if (!offset) |
| 663 | return; |
| 664 | offset += 4; /* Vendor ID at offset 4 */ |
| 665 | break; |
| 666 | case PCI_HEADER_TYPE_CARDBUS: |
| 667 | offset = PCI_CB_SUBSYSTEM_VENDOR_ID; |
| 668 | break; |
| 669 | default: |
| 670 | return; |
| 671 | } |
| 672 | |
Subrata Banik | 4a0f071 | 2019-03-20 14:29:47 +0530 | [diff] [blame] | 673 | if (!vendor || !device) { |
Subrata Banik | 9514d47 | 2019-03-20 14:56:27 +0530 | [diff] [blame] | 674 | pci_write_config32(dev, offset, |
Subrata Banik | 4a0f071 | 2019-03-20 14:29:47 +0530 | [diff] [blame] | 675 | pci_read_config32(dev, PCI_VENDOR_ID)); |
| 676 | } else { |
Subrata Banik | 9514d47 | 2019-03-20 14:56:27 +0530 | [diff] [blame] | 677 | pci_write_config32(dev, offset, |
Subrata Banik | 4a0f071 | 2019-03-20 14:29:47 +0530 | [diff] [blame] | 678 | ((device & 0xffff) << 16) | (vendor & 0xffff)); |
| 679 | } |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 680 | } |
| 681 | |
Frans Hendriks | b71181a | 2019-10-04 14:06:33 +0200 | [diff] [blame] | 682 | static int should_run_oprom(struct device *dev, struct rom_header *rom) |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 683 | { |
| 684 | static int should_run = -1; |
| 685 | |
Frans Hendriks | b71181a | 2019-10-04 14:06:33 +0200 | [diff] [blame] | 686 | if (CONFIG(VENDORCODE_ELTAN_VBOOT)) |
| 687 | if (rom != NULL) |
| 688 | if (!verified_boot_should_run_oprom(rom)) |
| 689 | return 0; |
| 690 | |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 691 | if (should_run >= 0) |
| 692 | return should_run; |
| 693 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 694 | if (CONFIG(ALWAYS_RUN_OPROM)) { |
Aaron Durbin | 1051025 | 2018-01-30 10:04:02 -0700 | [diff] [blame] | 695 | should_run = 1; |
| 696 | return should_run; |
| 697 | } |
| 698 | |
Kyösti Mälkki | 9ab1c10 | 2013-12-22 00:22:49 +0200 | [diff] [blame] | 699 | /* Don't run VGA option ROMs, unless we have to print |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 700 | * something on the screen before the kernel is loaded. |
| 701 | */ |
Furquan Shaikh | 0325dc6 | 2016-07-25 13:02:36 -0700 | [diff] [blame] | 702 | should_run = display_init_required(); |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 703 | |
Kyösti Mälkki | 9ab1c10 | 2013-12-22 00:22:49 +0200 | [diff] [blame] | 704 | if (!should_run) |
| 705 | printk(BIOS_DEBUG, "Not running VGA Option ROM\n"); |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 706 | return should_run; |
| 707 | } |
| 708 | |
| 709 | static int should_load_oprom(struct device *dev) |
| 710 | { |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 711 | /* If S3_VGA_ROM_RUN is disabled, skip running VGA option |
| 712 | * ROMs when coming out of an S3 resume. |
| 713 | */ |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 714 | if (!CONFIG(S3_VGA_ROM_RUN) && acpi_is_wakeup_s3() && |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 715 | ((dev->class >> 8) == PCI_CLASS_DISPLAY_VGA)) |
| 716 | return 0; |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 717 | if (CONFIG(ALWAYS_LOAD_OPROM)) |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 718 | return 1; |
Frans Hendriks | b71181a | 2019-10-04 14:06:33 +0200 | [diff] [blame] | 719 | if (should_run_oprom(dev, NULL)) |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 720 | return 1; |
| 721 | |
| 722 | return 0; |
| 723 | } |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 724 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 725 | /** Default handler: only runs the relevant PCI BIOS. */ |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 726 | void pci_dev_init(struct device *dev) |
| 727 | { |
| 728 | struct rom_header *rom, *ram; |
| 729 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 730 | if (!CONFIG(VGA_ROM_RUN)) |
Aaron Durbin | fbed9a5 | 2018-01-30 09:58:51 -0700 | [diff] [blame] | 731 | return; |
| 732 | |
Vladimir Serbinenko | b32816e | 2013-12-20 17:47:19 +0100 | [diff] [blame] | 733 | /* Only execute VGA ROMs. */ |
| 734 | if (((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)) |
Myles Watson | 17aeeca | 2009-10-07 18:41:08 +0000 | [diff] [blame] | 735 | return; |
Roman Kononov | 778a42b | 2007-04-06 18:34:39 +0000 | [diff] [blame] | 736 | |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 737 | if (!should_load_oprom(dev)) |
Stefan Reinauer | 74a0efe | 2012-03-30 17:10:49 -0700 | [diff] [blame] | 738 | return; |
Martin Roth | 5dd4a2a | 2018-03-06 16:10:45 -0700 | [diff] [blame] | 739 | timestamp_add_now(TS_OPROM_INITIALIZE); |
Aaron Durbin | ce872cb | 2013-03-28 15:59:19 -0500 | [diff] [blame] | 740 | |
| 741 | rom = pci_rom_probe(dev); |
| 742 | if (rom == NULL) |
| 743 | return; |
| 744 | |
| 745 | ram = pci_rom_load(dev, rom); |
| 746 | if (ram == NULL) |
| 747 | return; |
Martin Roth | 5dd4a2a | 2018-03-06 16:10:45 -0700 | [diff] [blame] | 748 | timestamp_add_now(TS_OPROM_COPY_END); |
Aaron Durbin | ce872cb | 2013-03-28 15:59:19 -0500 | [diff] [blame] | 749 | |
Frans Hendriks | b71181a | 2019-10-04 14:06:33 +0200 | [diff] [blame] | 750 | if (!should_run_oprom(dev, rom)) |
Kyösti Mälkki | 580e564 | 2014-05-01 16:31:34 +0300 | [diff] [blame] | 751 | return; |
| 752 | |
Stefan Reinauer | d98cf5b | 2008-08-01 11:25:41 +0000 | [diff] [blame] | 753 | run_bios(dev, (unsigned long)ram); |
Johanna Schander | db7a3ae | 2019-07-24 10:14:26 +0200 | [diff] [blame] | 754 | |
Kyösti Mälkki | ab56b3b | 2013-11-28 16:44:51 +0200 | [diff] [blame] | 755 | gfx_set_init_done(1); |
| 756 | printk(BIOS_DEBUG, "VGA Option ROM was run\n"); |
Martin Roth | 5dd4a2a | 2018-03-06 16:10:45 -0700 | [diff] [blame] | 757 | timestamp_add_now(TS_OPROM_END); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 758 | } |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 759 | |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 760 | /** Default device operation for PCI devices */ |
Subrata Banik | ffc790b | 2017-12-11 10:29:49 +0530 | [diff] [blame] | 761 | struct pci_operations pci_dev_ops_pci = { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 762 | .set_subsystem = pci_dev_set_subsystem, |
| 763 | }; |
| 764 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 765 | struct device_operations default_pci_ops_dev = { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 766 | .read_resources = pci_dev_read_resources, |
| 767 | .set_resources = pci_dev_set_resources, |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 768 | .enable_resources = pci_dev_enable_resources, |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 769 | #if CONFIG(HAVE_ACPI_TABLES) |
Patrick Rudolph | a5c2ac6 | 2016-03-31 20:04:23 +0200 | [diff] [blame] | 770 | .write_acpi_tables = pci_rom_write_acpi_tables, |
Patrick Rudolph | 00c0cd2 | 2017-06-06 19:30:55 +0200 | [diff] [blame] | 771 | .acpi_fill_ssdt_generator = pci_rom_ssdt, |
Patrick Rudolph | a5c2ac6 | 2016-03-31 20:04:23 +0200 | [diff] [blame] | 772 | #endif |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 773 | .init = pci_dev_init, |
| 774 | .scan_bus = 0, |
| 775 | .enable = 0, |
| 776 | .ops_pci = &pci_dev_ops_pci, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 777 | }; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 778 | |
| 779 | /** Default device operations for PCI bridges */ |
Eric Biederman | a9e632c | 2004-11-18 22:38:08 +0000 | [diff] [blame] | 780 | static struct pci_operations pci_bus_ops_pci = { |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 781 | .set_subsystem = 0, |
| 782 | }; |
Li-Ta Lo | 883b879 | 2005-01-10 23:16:22 +0000 | [diff] [blame] | 783 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 784 | struct device_operations default_pci_ops_bus = { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 785 | .read_resources = pci_bus_read_resources, |
| 786 | .set_resources = pci_dev_set_resources, |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 787 | .enable_resources = pci_bus_enable_resources, |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 788 | .init = 0, |
| 789 | .scan_bus = pci_scan_bridge, |
| 790 | .enable = 0, |
| 791 | .reset_bus = pci_bus_reset, |
| 792 | .ops_pci = &pci_bus_ops_pci, |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 793 | }; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 794 | |
| 795 | /** |
Nico Huber | 061b905 | 2019-09-21 15:58:23 +0200 | [diff] [blame] | 796 | * Check for compatibility to route legacy VGA cycles through a bridge. |
| 797 | * |
| 798 | * Originally, when decoding i/o ports for legacy VGA cycles, bridges |
| 799 | * should only consider the 10 least significant bits of the port address. |
| 800 | * This means all VGA registers were aliased every 1024 ports! |
| 801 | * e.g. 0x3b0 was also decoded as 0x7b0, 0xbb0 etc. |
| 802 | * |
| 803 | * To avoid this mess, a bridge control bit (VGA16) was introduced in |
| 804 | * 2003 to enable decoding of 16-bit port addresses. As we don't want |
| 805 | * to make this any more complex for now, we use this bit if possible |
| 806 | * and only warn if it's not supported (in set_vga_bridge_bits()). |
| 807 | */ |
| 808 | static void pci_bridge_vga_compat(struct bus *const bus) |
| 809 | { |
| 810 | uint16_t bridge_ctrl; |
| 811 | |
| 812 | bridge_ctrl = pci_read_config16(bus->dev, PCI_BRIDGE_CONTROL); |
| 813 | |
| 814 | /* Ensure VGA decoding is disabled during probing (it should |
| 815 | be by default, but we run blobs nowadays) */ |
| 816 | bridge_ctrl &= ~PCI_BRIDGE_CTL_VGA; |
| 817 | pci_write_config16(bus->dev, PCI_BRIDGE_CONTROL, bridge_ctrl); |
| 818 | |
| 819 | /* If the upstream bridge doesn't support VGA16, we don't have to check */ |
| 820 | bus->no_vga16 |= bus->dev->bus->no_vga16; |
| 821 | if (bus->no_vga16) |
| 822 | return; |
| 823 | |
| 824 | /* Test if we can enable 16-bit decoding */ |
| 825 | bridge_ctrl |= PCI_BRIDGE_CTL_VGA16; |
| 826 | pci_write_config16(bus->dev, PCI_BRIDGE_CONTROL, bridge_ctrl); |
| 827 | bridge_ctrl = pci_read_config16(bus->dev, PCI_BRIDGE_CONTROL); |
| 828 | |
| 829 | bus->no_vga16 = !(bridge_ctrl & PCI_BRIDGE_CTL_VGA16); |
| 830 | } |
| 831 | |
| 832 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 833 | * Detect the type of downstream bridge. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 834 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 835 | * This function is a heuristic to detect which type of bus is downstream |
| 836 | * of a PCI-to-PCI bridge. This functions by looking for various capability |
| 837 | * blocks to figure out the type of downstream bridge. PCI-X, PCI-E, and |
| 838 | * Hypertransport all seem to have appropriate capabilities. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 839 | * |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 840 | * When only a PCI-Express capability is found the type is examined to see |
| 841 | * which type of bridge we have. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 842 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 843 | * @param dev Pointer to the device structure of the bridge. |
| 844 | * @return Appropriate bridge operations. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 845 | */ |
Aaron Durbin | c30d913 | 2017-08-07 16:55:43 -0600 | [diff] [blame] | 846 | static struct device_operations *get_pci_bridge_ops(struct device *dev) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 847 | { |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 848 | #if CONFIG(PCIX_PLUGIN_SUPPORT) |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 849 | unsigned int pcixpos; |
| 850 | pcixpos = pci_find_capability(dev, PCI_CAP_ID_PCIX); |
| 851 | if (pcixpos) { |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 852 | printk(BIOS_DEBUG, "%s subordinate bus PCI-X\n", dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 853 | return &default_pcix_ops_bus; |
| 854 | } |
| 855 | #endif |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 856 | #if CONFIG(HYPERTRANSPORT_PLUGIN_SUPPORT) |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 857 | unsigned int htpos = 0; |
| 858 | while ((htpos = pci_find_next_capability(dev, PCI_CAP_ID_HT, htpos))) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 859 | u16 flags; |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 860 | flags = pci_read_config16(dev, htpos + PCI_CAP_FLAGS); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 861 | if ((flags >> 13) == 1) { |
| 862 | /* Host or Secondary Interface */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 863 | printk(BIOS_DEBUG, "%s subordinate bus HT\n", |
| 864 | dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 865 | return &default_ht_ops_bus; |
| 866 | } |
| 867 | } |
| 868 | #endif |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 869 | #if CONFIG(PCIEXP_PLUGIN_SUPPORT) |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 870 | unsigned int pciexpos; |
| 871 | pciexpos = pci_find_capability(dev, PCI_CAP_ID_PCIE); |
| 872 | if (pciexpos) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 873 | u16 flags; |
Ronald G. Minnich | 78a1667 | 2012-11-29 16:28:21 -0800 | [diff] [blame] | 874 | flags = pci_read_config16(dev, pciexpos + PCI_EXP_FLAGS); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 875 | switch ((flags & PCI_EXP_FLAGS_TYPE) >> 4) { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 876 | case PCI_EXP_TYPE_ROOT_PORT: |
| 877 | case PCI_EXP_TYPE_UPSTREAM: |
| 878 | case PCI_EXP_TYPE_DOWNSTREAM: |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 879 | printk(BIOS_DEBUG, "%s subordinate bus PCI Express\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 880 | dev_path(dev)); |
Jeremy Soller | cf2ac54 | 2019-10-09 21:40:36 -0600 | [diff] [blame^] | 881 | #if CONFIG(PCIEXP_HOTPLUG) |
| 882 | u16 sltcap; |
| 883 | sltcap = pci_read_config16(dev, pciexpos + PCI_EXP_SLTCAP); |
| 884 | if (sltcap & PCI_EXP_SLTCAP_HPC) { |
| 885 | printk(BIOS_DEBUG, "%s hot-plug capable\n", dev_path(dev)); |
| 886 | return &default_pciexp_hotplug_ops_bus; |
| 887 | } |
| 888 | #endif /* CONFIG(PCIEXP_HOTPLUG) */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 889 | return &default_pciexp_ops_bus; |
| 890 | case PCI_EXP_TYPE_PCI_BRIDGE: |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 891 | printk(BIOS_DEBUG, "%s subordinate PCI\n", |
| 892 | dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 893 | return &default_pci_ops_bus; |
| 894 | default: |
| 895 | break; |
| 896 | } |
| 897 | } |
| 898 | #endif |
| 899 | return &default_pci_ops_bus; |
| 900 | } |
| 901 | |
| 902 | /** |
Vadim Bendebury | 8049fc9 | 2012-04-24 12:53:19 -0700 | [diff] [blame] | 903 | * Check if a device id matches a PCI driver entry. |
| 904 | * |
| 905 | * The driver entry can either point at a zero terminated array of acceptable |
| 906 | * device IDs, or include a single device ID. |
| 907 | * |
Martin Roth | 98b698c | 2015-01-06 21:02:52 -0700 | [diff] [blame] | 908 | * @param driver pointer to the PCI driver entry being checked |
| 909 | * @param device_id PCI device ID of the device being matched |
Vadim Bendebury | 8049fc9 | 2012-04-24 12:53:19 -0700 | [diff] [blame] | 910 | */ |
| 911 | static int device_id_match(struct pci_driver *driver, unsigned short device_id) |
| 912 | { |
| 913 | if (driver->devices) { |
| 914 | unsigned short check_id; |
| 915 | const unsigned short *device_list = driver->devices; |
| 916 | while ((check_id = *device_list++) != 0) |
| 917 | if (check_id == device_id) |
| 918 | return 1; |
| 919 | } |
| 920 | |
| 921 | return (driver->device == device_id); |
| 922 | } |
| 923 | |
| 924 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 925 | * Set up PCI device operation. |
| 926 | * |
| 927 | * Check if it already has a driver. If not, use find_device_operations(), |
| 928 | * or set to a default based on type. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 929 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 930 | * @param dev Pointer to the device whose pci_ops you want to set. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 931 | * @see pci_drivers |
| 932 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 933 | static void set_pci_ops(struct device *dev) |
| 934 | { |
| 935 | struct pci_driver *driver; |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 936 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 937 | if (dev->ops) |
| 938 | return; |
| 939 | |
| 940 | /* |
| 941 | * Look through the list of setup drivers and find one for |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 942 | * this PCI device. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 943 | */ |
Aaron Durbin | 0375815 | 2015-09-03 17:23:08 -0500 | [diff] [blame] | 944 | for (driver = &_pci_drivers[0]; driver != &_epci_drivers[0]; driver++) { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 945 | if ((driver->vendor == dev->vendor) && |
Vadim Bendebury | 8049fc9 | 2012-04-24 12:53:19 -0700 | [diff] [blame] | 946 | device_id_match(driver, dev->device)) { |
Uwe Hermann | 312673c | 2009-10-27 21:49:33 +0000 | [diff] [blame] | 947 | dev->ops = (struct device_operations *)driver->ops; |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 948 | printk(BIOS_SPEW, "%s [%04x/%04x] %sops\n", |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 949 | dev_path(dev), driver->vendor, driver->device, |
| 950 | (driver->ops->scan_bus ? "bus " : "")); |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 951 | return; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 952 | } |
| 953 | } |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 954 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 955 | /* If I don't have a specific driver use the default operations. */ |
| 956 | switch (dev->hdr_type & 0x7f) { /* Header type */ |
| 957 | case PCI_HEADER_TYPE_NORMAL: |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 958 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) |
| 959 | goto bad; |
| 960 | dev->ops = &default_pci_ops_dev; |
| 961 | break; |
| 962 | case PCI_HEADER_TYPE_BRIDGE: |
| 963 | if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) |
| 964 | goto bad; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 965 | dev->ops = get_pci_bridge_ops(dev); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 966 | break; |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 967 | #if CONFIG(CARDBUS_PLUGIN_SUPPORT) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 968 | case PCI_HEADER_TYPE_CARDBUS: |
| 969 | dev->ops = &default_cardbus_ops_bus; |
| 970 | break; |
| 971 | #endif |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 972 | default: |
| 973 | bad: |
Li-Ta Lo | 69c5a90 | 2004-04-29 20:08:54 +0000 | [diff] [blame] | 974 | if (dev->enabled) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 975 | printk(BIOS_ERR, "%s [%04x/%04x/%06x] has unknown " |
| 976 | "header type %02x, ignoring.\n", dev_path(dev), |
| 977 | dev->vendor, dev->device, |
| 978 | dev->class >> 8, dev->hdr_type); |
Eric Biederman | 83b991a | 2003-10-11 06:20:25 +0000 | [diff] [blame] | 979 | } |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 980 | } |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 981 | } |
| 982 | |
| 983 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 984 | * See if we have already allocated a device structure for a given devfn. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 985 | * |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 986 | * Given a PCI bus structure and a devfn number, find the device structure |
| 987 | * corresponding to the devfn, if present. Then move the device structure |
| 988 | * as the last child on the bus. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 989 | * |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 990 | * @param bus Pointer to the bus structure. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 991 | * @param devfn A device/function number. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 992 | * @return Pointer to the device structure found or NULL if we have not |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 993 | * allocated a device for this devfn yet. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 994 | */ |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 995 | static struct device *pci_scan_get_dev(struct bus *bus, unsigned int devfn) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 996 | { |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 997 | struct device *dev, **prev; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 998 | |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 999 | prev = &bus->children; |
| 1000 | for (dev = bus->children; dev; dev = dev->sibling) { |
| 1001 | if (dev->path.type == DEVICE_PATH_PCI) { |
| 1002 | if (dev->path.pci.devfn == devfn) { |
| 1003 | /* Unlink from the list. */ |
| 1004 | *prev = dev->sibling; |
| 1005 | dev->sibling = NULL; |
| 1006 | break; |
| 1007 | } |
| 1008 | } else { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1009 | printk(BIOS_ERR, "child %s not a PCI device\n", |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1010 | dev_path(dev)); |
Eric Biederman | ad1b35a | 2003-10-14 02:36:51 +0000 | [diff] [blame] | 1011 | } |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1012 | prev = &dev->sibling; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1013 | } |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1014 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1015 | /* |
| 1016 | * Just like alloc_dev() add the device to the list of devices on the |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1017 | * bus. When the list of devices was formed we removed all of the |
| 1018 | * parents children, and now we are interleaving static and dynamic |
| 1019 | * devices in order on the bus. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1020 | */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1021 | if (dev) { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1022 | struct device *child; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1023 | |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1024 | /* Find the last child on the bus. */ |
| 1025 | for (child = bus->children; child && child->sibling;) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1026 | child = child->sibling; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1027 | |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1028 | /* Place the device as last on the bus. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1029 | if (child) |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1030 | child->sibling = dev; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1031 | else |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1032 | bus->children = dev; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1033 | } |
| 1034 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1035 | return dev; |
| 1036 | } |
| 1037 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1038 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1039 | * Scan a PCI bus. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1040 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1041 | * Determine the existence of a given PCI device. Allocate a new struct device |
| 1042 | * if dev==NULL was passed in and the device exists in hardware. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1043 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1044 | * @param dev Pointer to the dev structure. |
| 1045 | * @param bus Pointer to the bus structure. |
| 1046 | * @param devfn A device/function number to look at. |
| 1047 | * @return The device structure for the device (if found), NULL otherwise. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1048 | */ |
Aaron Durbin | c30d913 | 2017-08-07 16:55:43 -0600 | [diff] [blame] | 1049 | struct device *pci_probe_dev(struct device *dev, struct bus *bus, |
| 1050 | unsigned int devfn) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1051 | { |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1052 | u32 id, class; |
| 1053 | u8 hdr_type; |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1054 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1055 | /* Detect if a device is present. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1056 | if (!dev) { |
| 1057 | struct device dummy; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1058 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1059 | dummy.bus = bus; |
| 1060 | dummy.path.type = DEVICE_PATH_PCI; |
Stefan Reinauer | 2b34db8 | 2009-02-28 20:10:20 +0000 | [diff] [blame] | 1061 | dummy.path.pci.devfn = devfn; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1062 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1063 | id = pci_read_config32(&dummy, PCI_VENDOR_ID); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1064 | /* |
| 1065 | * Have we found something? Some broken boards return 0 if a |
| 1066 | * slot is empty, but the expected answer is 0xffffffff. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1067 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1068 | if (id == 0xffffffff) |
Stefan Reinauer | 7355c75 | 2010-04-02 16:30:25 +0000 | [diff] [blame] | 1069 | return NULL; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1070 | |
Stefan Reinauer | 7355c75 | 2010-04-02 16:30:25 +0000 | [diff] [blame] | 1071 | if ((id == 0x00000000) || (id == 0x0000ffff) || |
| 1072 | (id == 0xffff0000)) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1073 | printk(BIOS_SPEW, "%s, bad id 0x%x\n", |
| 1074 | dev_path(&dummy), id); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1075 | return NULL; |
| 1076 | } |
| 1077 | dev = alloc_dev(bus, &dummy.path); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1078 | } else { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1079 | /* |
| 1080 | * Enable/disable the device. Once we have found the device- |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1081 | * specific operations this operations we will disable the |
| 1082 | * device with those as well. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1083 | * |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1084 | * This is geared toward devices that have subfunctions |
| 1085 | * that do not show up by default. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1086 | * |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1087 | * If a device is a stuff option on the motherboard |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1088 | * it may be absent and enable_dev() must cope. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1089 | */ |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1090 | /* Run the magic enable sequence for the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1091 | if (dev->chip_ops && dev->chip_ops->enable_dev) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1092 | dev->chip_ops->enable_dev(dev); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1093 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1094 | /* Now read the vendor and device ID. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1095 | id = pci_read_config32(dev, PCI_VENDOR_ID); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1096 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1097 | /* |
| 1098 | * If the device does not have a PCI ID disable it. Possibly |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1099 | * this is because we have already disabled the device. But |
| 1100 | * this also handles optional devices that may not always |
| 1101 | * show up. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1102 | */ |
| 1103 | /* If the chain is fully enumerated quit */ |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1104 | if ((id == 0xffffffff) || (id == 0x00000000) || |
| 1105 | (id == 0x0000ffff) || (id == 0xffff0000)) { |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1106 | if (dev->enabled) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1107 | printk(BIOS_INFO, "PCI: Static device %s not " |
| 1108 | "found, disabling it.\n", dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1109 | dev->enabled = 0; |
| 1110 | } |
| 1111 | return dev; |
| 1112 | } |
| 1113 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1114 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1115 | /* Read the rest of the PCI configuration information. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1116 | hdr_type = pci_read_config8(dev, PCI_HEADER_TYPE); |
| 1117 | class = pci_read_config32(dev, PCI_CLASS_REVISION); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1118 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1119 | /* Store the interesting information in the device structure. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1120 | dev->vendor = id & 0xffff; |
| 1121 | dev->device = (id >> 16) & 0xffff; |
| 1122 | dev->hdr_type = hdr_type; |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1123 | |
| 1124 | /* Class code, the upper 3 bytes of PCI_CLASS_REVISION. */ |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1125 | dev->class = class >> 8; |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1126 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1127 | /* Architectural/System devices always need to be bus masters. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1128 | if ((dev->class >> 16) == PCI_BASE_CLASS_SYSTEM) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1129 | dev->command |= PCI_COMMAND_MASTER; |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1130 | |
| 1131 | /* |
| 1132 | * Look at the vendor and device ID, or at least the header type and |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1133 | * class and figure out which set of configuration methods to use. |
| 1134 | * Unless we already have some PCI ops. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1135 | */ |
| 1136 | set_pci_ops(dev); |
| 1137 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1138 | /* Now run the magic enable/disable sequence for the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1139 | if (dev->ops && dev->ops->enable) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1140 | dev->ops->enable(dev); |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1141 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1142 | /* Display the device. */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1143 | printk(BIOS_DEBUG, "%s [%04x/%04x] %s%s\n", dev_path(dev), |
| 1144 | dev->vendor, dev->device, dev->enabled ? "enabled" : "disabled", |
| 1145 | dev->ops ? "" : " No operations"); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1146 | |
| 1147 | return dev; |
| 1148 | } |
| 1149 | |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1150 | /** |
Kyösti Mälkki | c73acdb | 2013-06-15 17:16:56 +0300 | [diff] [blame] | 1151 | * Test for match between romstage and ramstage device instance. |
| 1152 | * |
| 1153 | * @param dev Pointer to the device structure. |
| 1154 | * @param sdev Simple device model identifier, created with PCI_DEV(). |
| 1155 | * @return Non-zero if bus:dev.fn of device matches. |
| 1156 | */ |
Aaron Durbin | c30d913 | 2017-08-07 16:55:43 -0600 | [diff] [blame] | 1157 | unsigned int pci_match_simple_dev(struct device *dev, pci_devfn_t sdev) |
Kyösti Mälkki | c73acdb | 2013-06-15 17:16:56 +0300 | [diff] [blame] | 1158 | { |
| 1159 | return dev->bus->secondary == PCI_DEV2SEGBUS(sdev) && |
| 1160 | dev->path.pci.devfn == PCI_DEV2DEVFN(sdev); |
| 1161 | } |
| 1162 | |
| 1163 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1164 | * Scan a PCI bus. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1165 | * |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1166 | * Determine the existence of devices and bridges on a PCI bus. If there are |
| 1167 | * bridges on the bus, recursively scan the buses behind the bridges. |
| 1168 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1169 | * @param bus Pointer to the bus structure. |
| 1170 | * @param min_devfn Minimum devfn to look at in the scan, usually 0x00. |
| 1171 | * @param max_devfn Maximum devfn to look at in the scan, usually 0xff. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1172 | */ |
Martin Roth | 38ddbfb | 2019-10-23 21:41:00 -0600 | [diff] [blame] | 1173 | void pci_scan_bus(struct bus *bus, unsigned int min_devfn, |
| 1174 | unsigned int max_devfn) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1175 | { |
| 1176 | unsigned int devfn; |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1177 | struct device *dev, **prev; |
| 1178 | int once = 0; |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1179 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1180 | printk(BIOS_DEBUG, "PCI: pci_scan_bus for bus %02x\n", bus->secondary); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1181 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1182 | /* Maximum sane devfn is 0xFF. */ |
Juhana Helovuo | 50b78b6 | 2010-09-13 14:43:02 +0000 | [diff] [blame] | 1183 | if (max_devfn > 0xff) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1184 | printk(BIOS_ERR, "PCI: pci_scan_bus limits devfn %x - " |
| 1185 | "devfn %x\n", min_devfn, max_devfn); |
| 1186 | printk(BIOS_ERR, "PCI: pci_scan_bus upper limit too big. " |
| 1187 | "Using 0xff.\n"); |
Juhana Helovuo | 50b78b6 | 2010-09-13 14:43:02 +0000 | [diff] [blame] | 1188 | max_devfn=0xff; |
| 1189 | } |
| 1190 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1191 | post_code(0x24); |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1192 | |
| 1193 | /* |
| 1194 | * Probe all devices/functions on this bus with some optimization for |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1195 | * non-existence and single function devices. |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1196 | */ |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1197 | for (devfn = min_devfn; devfn <= max_devfn; devfn++) { |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1198 | /* First thing setup the device structure. */ |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1199 | dev = pci_scan_get_dev(bus, devfn); |
Li-Ta Lo | 9782f75 | 2004-05-05 21:15:42 +0000 | [diff] [blame] | 1200 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1201 | /* See if a device is present and setup the device structure. */ |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1202 | dev = pci_probe_dev(dev, bus, devfn); |
Eric Biederman | 03acab6 | 2004-10-14 21:25:53 +0000 | [diff] [blame] | 1203 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1204 | /* |
| 1205 | * If this is not a multi function device, or the device is |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1206 | * not present don't waste time probing another function. |
Myles Watson | 032a965 | 2009-05-11 22:24:53 +0000 | [diff] [blame] | 1207 | * Skip to next device. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1208 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1209 | if ((PCI_FUNC(devfn) == 0x00) && (!dev |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1210 | || (dev->enabled && ((dev->hdr_type & 0x80) != 0x80)))) { |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1211 | devfn += 0x07; |
| 1212 | } |
| 1213 | } |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1214 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1215 | post_code(0x25); |
| 1216 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1217 | /* |
| 1218 | * Warn if any leftover static devices are are found. |
| 1219 | * There's probably a problem in devicetree.cb. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1220 | */ |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1221 | |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1222 | prev = &bus->children; |
| 1223 | for (dev = bus->children; dev; dev = dev->sibling) { |
| 1224 | /* If we read valid vendor id, it is not leftover device. */ |
| 1225 | if (dev->vendor != 0) { |
| 1226 | prev = &dev->sibling; |
| 1227 | continue; |
| 1228 | } |
| 1229 | |
| 1230 | /* Unlink it from list. */ |
| 1231 | *prev = dev->sibling; |
| 1232 | |
| 1233 | if (!once++) |
| 1234 | printk(BIOS_WARNING, "PCI: Leftover static devices:\n"); |
| 1235 | printk(BIOS_WARNING, "%s\n", dev_path(dev)); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1236 | } |
| 1237 | |
Kyösti Mälkki | 8712aa1 | 2019-01-09 11:31:25 +0200 | [diff] [blame] | 1238 | if (once) |
| 1239 | printk(BIOS_WARNING, "PCI: Check your devicetree.cb.\n"); |
| 1240 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1241 | /* |
| 1242 | * For all children that implement scan_bus() (i.e. bridges) |
Eric Biederman | b78c197 | 2004-10-14 20:54:17 +0000 | [diff] [blame] | 1243 | * scan the bus behind that child. |
| 1244 | */ |
Kyösti Mälkki | de271a8 | 2015-03-18 13:09:47 +0200 | [diff] [blame] | 1245 | |
Kyösti Mälkki | 2d2367c | 2015-02-20 21:28:31 +0200 | [diff] [blame] | 1246 | scan_bridges(bus); |
Kyösti Mälkki | de271a8 | 2015-03-18 13:09:47 +0200 | [diff] [blame] | 1247 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1248 | /* |
| 1249 | * We've scanned the bus and so we know all about what's on the other |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1250 | * side of any bridges that may be on this bus plus any devices. |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1251 | * Return how far we've got finding sub-buses. |
| 1252 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1253 | post_code(0x55); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1254 | } |
| 1255 | |
Kyösti Mälkki | 3345240 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1256 | typedef enum { |
| 1257 | PCI_ROUTE_CLOSE, |
| 1258 | PCI_ROUTE_SCAN, |
| 1259 | PCI_ROUTE_FINAL, |
| 1260 | } scan_state; |
| 1261 | |
| 1262 | static void pci_bridge_route(struct bus *link, scan_state state) |
| 1263 | { |
| 1264 | struct device *dev = link->dev; |
| 1265 | struct bus *parent = dev->bus; |
| 1266 | u32 reg, buses = 0; |
| 1267 | |
Kyösti Mälkki | 757c8b4 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1268 | if (state == PCI_ROUTE_SCAN) { |
| 1269 | link->secondary = parent->subordinate + 1; |
Jeremy Soller | cf2ac54 | 2019-10-09 21:40:36 -0600 | [diff] [blame^] | 1270 | link->subordinate = link->secondary + dev->hotplug_buses; |
Kyösti Mälkki | 757c8b4 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1271 | } |
| 1272 | |
Kyösti Mälkki | 3345240 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1273 | if (state == PCI_ROUTE_CLOSE) { |
| 1274 | buses |= 0xfeff << 8; |
| 1275 | } else if (state == PCI_ROUTE_SCAN) { |
Timothy Pearson | 7d8a478 | 2015-10-24 20:34:57 -0500 | [diff] [blame] | 1276 | buses |= parent->secondary & 0xff; |
Kyösti Mälkki | 3345240 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1277 | buses |= ((u32) link->secondary & 0xff) << 8; |
Kyösti Mälkki | 757c8b4 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1278 | buses |= 0xff << 16; /* MAX PCI_BUS number here */ |
Kyösti Mälkki | 3345240 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1279 | } else if (state == PCI_ROUTE_FINAL) { |
| 1280 | buses |= parent->secondary & 0xff; |
| 1281 | buses |= ((u32) link->secondary & 0xff) << 8; |
| 1282 | buses |= ((u32) link->subordinate & 0xff) << 16; |
| 1283 | } |
| 1284 | |
| 1285 | if (state == PCI_ROUTE_SCAN) { |
| 1286 | /* Clear all status bits and turn off memory, I/O and master enables. */ |
| 1287 | link->bridge_cmd = pci_read_config16(dev, PCI_COMMAND); |
| 1288 | pci_write_config16(dev, PCI_COMMAND, 0x0000); |
| 1289 | pci_write_config16(dev, PCI_STATUS, 0xffff); |
| 1290 | } |
| 1291 | |
| 1292 | /* |
| 1293 | * Configure the bus numbers for this bridge: the configuration |
| 1294 | * transactions will not be propagated by the bridge if it is not |
| 1295 | * correctly configured. |
| 1296 | */ |
| 1297 | |
| 1298 | reg = pci_read_config32(dev, PCI_PRIMARY_BUS); |
| 1299 | reg &= 0xff000000; |
| 1300 | reg |= buses; |
| 1301 | pci_write_config32(dev, PCI_PRIMARY_BUS, reg); |
| 1302 | |
| 1303 | if (state == PCI_ROUTE_FINAL) { |
| 1304 | pci_write_config16(dev, PCI_COMMAND, link->bridge_cmd); |
Kyösti Mälkki | 757c8b4 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1305 | parent->subordinate = link->subordinate; |
Kyösti Mälkki | 3345240 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1306 | } |
| 1307 | } |
| 1308 | |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1309 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1310 | * Scan a PCI bridge and the buses behind the bridge. |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1311 | * |
| 1312 | * Determine the existence of buses behind the bridge. Set up the bridge |
| 1313 | * according to the result of the scan. |
| 1314 | * |
| 1315 | * This function is the default scan_bus() method for PCI bridge devices. |
| 1316 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1317 | * @param dev Pointer to the bridge device. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1318 | * @param do_scan_bus TODO |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1319 | */ |
Kyösti Mälkki | 580e722 | 2015-03-19 21:04:23 +0200 | [diff] [blame] | 1320 | void do_pci_scan_bridge(struct device *dev, |
Kyösti Mälkki | de271a8 | 2015-03-18 13:09:47 +0200 | [diff] [blame] | 1321 | void (*do_scan_bus) (struct bus * bus, |
Martin Roth | 38ddbfb | 2019-10-23 21:41:00 -0600 | [diff] [blame] | 1322 | unsigned int min_devfn, |
| 1323 | unsigned int max_devfn)) |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1324 | { |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1325 | struct bus *bus; |
Eric Biederman | 83b991a | 2003-10-11 06:20:25 +0000 | [diff] [blame] | 1326 | |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1327 | printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(dev)); |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 1328 | |
Myles Watson | 894a347 | 2010-06-09 22:41:35 +0000 | [diff] [blame] | 1329 | if (dev->link_list == NULL) { |
| 1330 | struct bus *link; |
| 1331 | link = malloc(sizeof(*link)); |
| 1332 | if (link == NULL) |
| 1333 | die("Couldn't allocate a link!\n"); |
| 1334 | memset(link, 0, sizeof(*link)); |
| 1335 | link->dev = dev; |
| 1336 | dev->link_list = link; |
| 1337 | } |
| 1338 | |
| 1339 | bus = dev->link_list; |
Eric Biederman | e9a271e3 | 2003-09-02 03:36:25 +0000 | [diff] [blame] | 1340 | |
Nico Huber | 061b905 | 2019-09-21 15:58:23 +0200 | [diff] [blame] | 1341 | pci_bridge_vga_compat(bus); |
| 1342 | |
Kyösti Mälkki | 3345240 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1343 | pci_bridge_route(bus, PCI_ROUTE_SCAN); |
Li-Ta Lo | 3a81285 | 2004-12-03 22:39:34 +0000 | [diff] [blame] | 1344 | |
Kyösti Mälkki | de271a8 | 2015-03-18 13:09:47 +0200 | [diff] [blame] | 1345 | do_scan_bus(bus, 0x00, 0xff); |
Kyösti Mälkki | 3345240 | 2015-02-23 06:58:26 +0200 | [diff] [blame] | 1346 | |
| 1347 | pci_bridge_route(bus, PCI_ROUTE_FINAL); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1348 | } |
Li-Ta Lo | e526669 | 2004-03-23 21:28:05 +0000 | [diff] [blame] | 1349 | |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1350 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1351 | * Scan a PCI bridge and the buses behind the bridge. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1352 | * |
| 1353 | * Determine the existence of buses behind the bridge. Set up the bridge |
| 1354 | * according to the result of the scan. |
| 1355 | * |
| 1356 | * This function is the default scan_bus() method for PCI bridge devices. |
| 1357 | * |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1358 | * @param dev Pointer to the bridge device. |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1359 | */ |
Kyösti Mälkki | 580e722 | 2015-03-19 21:04:23 +0200 | [diff] [blame] | 1360 | void pci_scan_bridge(struct device *dev) |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1361 | { |
Kyösti Mälkki | 580e722 | 2015-03-19 21:04:23 +0200 | [diff] [blame] | 1362 | do_pci_scan_bridge(dev, pci_scan_bus); |
Yinghai Lu | 13f1c2a | 2005-07-08 02:49:49 +0000 | [diff] [blame] | 1363 | } |
| 1364 | |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1365 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1366 | * Scan a PCI domain. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1367 | * |
| 1368 | * This function is the default scan_bus() method for PCI domains. |
| 1369 | * |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1370 | * @param dev Pointer to the domain. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1371 | */ |
Aaron Durbin | c30d913 | 2017-08-07 16:55:43 -0600 | [diff] [blame] | 1372 | void pci_domain_scan_bus(struct device *dev) |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1373 | { |
Kyösti Mälkki | 6f37017 | 2015-03-19 15:26:52 +0200 | [diff] [blame] | 1374 | struct bus *link = dev->link_list; |
Kyösti Mälkki | de271a8 | 2015-03-18 13:09:47 +0200 | [diff] [blame] | 1375 | pci_scan_bus(link, PCI_DEVFN(0, 0), 0xff); |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1376 | } |
| 1377 | |
Mike Loptien | 0f5cf5e | 2014-05-12 21:46:31 -0600 | [diff] [blame] | 1378 | /** |
| 1379 | * Take an INT_PIN number (0, 1 - 4) and convert |
| 1380 | * it to a string ("NO PIN", "PIN A" - "PIN D") |
| 1381 | * |
| 1382 | * @param pin PCI Interrupt Pin number (0, 1 - 4) |
| 1383 | * @return A string corresponding to the pin number or "Invalid" |
| 1384 | */ |
| 1385 | const char *pin_to_str(int pin) |
| 1386 | { |
| 1387 | const char *str[5] = { |
| 1388 | "NO PIN", |
| 1389 | "PIN A", |
| 1390 | "PIN B", |
| 1391 | "PIN C", |
| 1392 | "PIN D", |
| 1393 | }; |
| 1394 | |
| 1395 | if (pin >= 0 && pin <= 4) |
| 1396 | return str[pin]; |
| 1397 | else |
| 1398 | return "Invalid PIN, not 0 - 4"; |
| 1399 | } |
| 1400 | |
| 1401 | /** |
| 1402 | * Get the PCI INT_PIN swizzle for a device defined as: |
| 1403 | * pin_parent = (pin_child + devn_child) % 4 + 1 |
| 1404 | * where PIN A = 1 ... PIN_D = 4 |
| 1405 | * |
| 1406 | * Given a PCI device structure 'dev', find the interrupt pin |
| 1407 | * that will be triggered on its parent bridge device when |
| 1408 | * generating an interrupt. For example: Device 1:3.2 may |
| 1409 | * use INT_PIN A but will trigger PIN D on its parent bridge |
| 1410 | * device. In this case, this function will return 4 (PIN D). |
| 1411 | * |
| 1412 | * @param dev A PCI device structure to swizzle interrupt pins for |
Martin Roth | 32bc6b6 | 2015-01-04 16:54:35 -0700 | [diff] [blame] | 1413 | * @param *parent_bridge The PCI device structure for the bridge |
Mike Loptien | 0f5cf5e | 2014-05-12 21:46:31 -0600 | [diff] [blame] | 1414 | * device 'dev' is attached to |
| 1415 | * @return The interrupt pin number (1 - 4) that 'dev' will |
| 1416 | * trigger when generating an interrupt |
| 1417 | */ |
Aaron Durbin | c30d913 | 2017-08-07 16:55:43 -0600 | [diff] [blame] | 1418 | static int swizzle_irq_pins(struct device *dev, struct device **parent_bridge) |
Mike Loptien | 0f5cf5e | 2014-05-12 21:46:31 -0600 | [diff] [blame] | 1419 | { |
Aaron Durbin | c30d913 | 2017-08-07 16:55:43 -0600 | [diff] [blame] | 1420 | struct device *parent; /* Our current device's parent device */ |
| 1421 | struct device *child; /* The child device of the parent */ |
Mike Loptien | 0f5cf5e | 2014-05-12 21:46:31 -0600 | [diff] [blame] | 1422 | uint8_t parent_bus = 0; /* Parent Bus number */ |
| 1423 | uint16_t parent_devfn = 0; /* Parent Device and Function number */ |
| 1424 | uint16_t child_devfn = 0; /* Child Device and Function number */ |
| 1425 | uint8_t swizzled_pin = 0; /* Pin swizzled across a bridge */ |
| 1426 | |
| 1427 | /* Start with PIN A = 0 ... D = 3 */ |
| 1428 | swizzled_pin = pci_read_config8(dev, PCI_INTERRUPT_PIN) - 1; |
| 1429 | |
| 1430 | /* While our current device has parent devices */ |
| 1431 | child = dev; |
| 1432 | for (parent = child->bus->dev; parent; parent = parent->bus->dev) { |
| 1433 | parent_bus = parent->bus->secondary; |
| 1434 | parent_devfn = parent->path.pci.devfn; |
| 1435 | child_devfn = child->path.pci.devfn; |
| 1436 | |
| 1437 | /* Swizzle the INT_PIN for any bridges not on root bus */ |
| 1438 | swizzled_pin = (PCI_SLOT(child_devfn) + swizzled_pin) % 4; |
| 1439 | printk(BIOS_SPEW, "\tWith INT_PIN swizzled to %s\n" |
| 1440 | "\tAttached to bridge device %01X:%02Xh.%02Xh\n", |
| 1441 | pin_to_str(swizzled_pin + 1), parent_bus, |
| 1442 | PCI_SLOT(parent_devfn), PCI_FUNC(parent_devfn)); |
| 1443 | |
| 1444 | /* Continue until we find the root bus */ |
| 1445 | if (parent_bus > 0) { |
| 1446 | /* |
| 1447 | * We will go on to the next parent so this parent |
| 1448 | * becomes the child |
| 1449 | */ |
| 1450 | child = parent; |
| 1451 | continue; |
| 1452 | } else { |
| 1453 | /* |
| 1454 | * Found the root bridge device, |
| 1455 | * fill in the structure and exit |
| 1456 | */ |
| 1457 | *parent_bridge = parent; |
| 1458 | break; |
| 1459 | } |
| 1460 | } |
| 1461 | |
| 1462 | /* End with PIN A = 1 ... D = 4 */ |
| 1463 | return swizzled_pin + 1; |
| 1464 | } |
| 1465 | |
| 1466 | /** |
| 1467 | * Given a device structure 'dev', find its interrupt pin |
| 1468 | * and its parent bridge 'parent_bdg' device structure. |
| 1469 | * If it is behind a bridge, it will return the interrupt |
| 1470 | * pin number (1 - 4) of the parent bridge that the device |
| 1471 | * interrupt pin has been swizzled to, otherwise it will |
| 1472 | * return the interrupt pin that is programmed into the |
| 1473 | * PCI config space of the target device. If 'dev' is |
| 1474 | * behind a bridge, it will fill in 'parent_bdg' with the |
| 1475 | * device structure of the bridge it is behind, otherwise |
| 1476 | * it will copy 'dev' into 'parent_bdg'. |
| 1477 | * |
| 1478 | * @param dev A PCI device structure to get interrupt pins for. |
| 1479 | * @param *parent_bdg The PCI device structure for the bridge |
| 1480 | * device 'dev' is attached to. |
| 1481 | * @return The interrupt pin number (1 - 4) that 'dev' will |
| 1482 | * trigger when generating an interrupt. |
| 1483 | * Errors: -1 is returned if the device is not enabled |
| 1484 | * -2 is returned if a parent bridge could not be found. |
| 1485 | */ |
Aaron Durbin | c30d913 | 2017-08-07 16:55:43 -0600 | [diff] [blame] | 1486 | int get_pci_irq_pins(struct device *dev, struct device **parent_bdg) |
Mike Loptien | 0f5cf5e | 2014-05-12 21:46:31 -0600 | [diff] [blame] | 1487 | { |
| 1488 | uint8_t bus = 0; /* The bus this device is on */ |
| 1489 | uint16_t devfn = 0; /* This device's device and function numbers */ |
| 1490 | uint8_t int_pin = 0; /* Interrupt pin used by the device */ |
| 1491 | uint8_t target_pin = 0; /* Interrupt pin we want to assign an IRQ to */ |
| 1492 | |
| 1493 | /* Make sure this device is enabled */ |
| 1494 | if (!(dev->enabled && (dev->path.type == DEVICE_PATH_PCI))) |
| 1495 | return -1; |
| 1496 | |
| 1497 | bus = dev->bus->secondary; |
| 1498 | devfn = dev->path.pci.devfn; |
| 1499 | |
| 1500 | /* Get and validate the interrupt pin used. Only 1-4 are allowed */ |
| 1501 | int_pin = pci_read_config8(dev, PCI_INTERRUPT_PIN); |
| 1502 | if (int_pin < 1 || int_pin > 4) |
| 1503 | return -1; |
| 1504 | |
| 1505 | printk(BIOS_SPEW, "PCI IRQ: Found device %01X:%02X.%02X using %s\n", |
| 1506 | bus, PCI_SLOT(devfn), PCI_FUNC(devfn), pin_to_str(int_pin)); |
| 1507 | |
| 1508 | /* If this device is on a bridge, swizzle its INT_PIN */ |
| 1509 | if (bus) { |
| 1510 | /* Swizzle its INT_PINs */ |
| 1511 | target_pin = swizzle_irq_pins(dev, parent_bdg); |
| 1512 | |
| 1513 | /* Make sure the swizzle returned valid structures */ |
| 1514 | if (parent_bdg == NULL) { |
| 1515 | printk(BIOS_WARNING, |
| 1516 | "Warning: Could not find parent bridge for this device!\n"); |
| 1517 | return -2; |
| 1518 | } |
| 1519 | } else { /* Device is not behind a bridge */ |
| 1520 | target_pin = int_pin; /* Return its own interrupt pin */ |
| 1521 | *parent_bdg = dev; /* Return its own structure */ |
| 1522 | } |
| 1523 | |
| 1524 | /* Target pin is the interrupt pin we want to assign an IRQ to */ |
| 1525 | return target_pin; |
| 1526 | } |
| 1527 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 1528 | #if CONFIG(PC80_SYSTEM) |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1529 | /** |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1530 | * Assign IRQ numbers. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1531 | * |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1532 | * This function assigns IRQs for all functions contained within the indicated |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1533 | * device address. If the device does not exist or does not require interrupts |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1534 | * then this function has no effect. |
Myles Watson | 29cc9ed | 2009-07-02 18:56:24 +0000 | [diff] [blame] | 1535 | * |
| 1536 | * This function should be called for each PCI slot in your system. |
| 1537 | * |
Kyösti Mälkki | c19d6a6 | 2019-07-04 21:39:28 +0300 | [diff] [blame] | 1538 | * @param dev Pointer to dev structure. |
Uwe Hermann | c1ee429 | 2010-10-17 19:01:48 +0000 | [diff] [blame] | 1539 | * @param pIntAtoD An array of IRQ #s that are assigned to PINTA through PINTD |
| 1540 | * of this slot. The particular IRQ #s that are passed in depend on the |
| 1541 | * routing inside your southbridge and on your board. |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1542 | */ |
Kyösti Mälkki | c19d6a6 | 2019-07-04 21:39:28 +0300 | [diff] [blame] | 1543 | void pci_assign_irqs(struct device *dev, const unsigned char pIntAtoD[4]) |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1544 | { |
Kyösti Mälkki | c19d6a6 | 2019-07-04 21:39:28 +0300 | [diff] [blame] | 1545 | u8 slot, line, irq; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1546 | |
Kyösti Mälkki | c19d6a6 | 2019-07-04 21:39:28 +0300 | [diff] [blame] | 1547 | /* Each device may contain up to eight functions. */ |
| 1548 | slot = dev->path.pci.devfn >> 3; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1549 | |
Kyösti Mälkki | c19d6a6 | 2019-07-04 21:39:28 +0300 | [diff] [blame] | 1550 | for (; dev ; dev = dev->sibling) { |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1551 | |
Kyösti Mälkki | c19d6a6 | 2019-07-04 21:39:28 +0300 | [diff] [blame] | 1552 | if (dev->path.pci.devfn >> 3 != slot) |
| 1553 | break; |
| 1554 | |
| 1555 | line = pci_read_config8(dev, PCI_INTERRUPT_PIN); |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1556 | |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1557 | /* PCI spec says all values except 1..4 are reserved. */ |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1558 | if ((line < 1) || (line > 4)) |
| 1559 | continue; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1560 | |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1561 | irq = pIntAtoD[line - 1]; |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1562 | |
Kyösti Mälkki | c19d6a6 | 2019-07-04 21:39:28 +0300 | [diff] [blame] | 1563 | printk(BIOS_DEBUG, "Assigning IRQ %d to %s\n", irq, dev_path(dev)); |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1564 | |
Kyösti Mälkki | c19d6a6 | 2019-07-04 21:39:28 +0300 | [diff] [blame] | 1565 | pci_write_config8(dev, PCI_INTERRUPT_LINE, pIntAtoD[line - 1]); |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1566 | |
| 1567 | #ifdef PARANOID_IRQ_ASSIGNMENTS |
Myles Watson | 17aeeca | 2009-10-07 18:41:08 +0000 | [diff] [blame] | 1568 | irq = pci_read_config8(pdev, PCI_INTERRUPT_LINE); |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 1569 | printk(BIOS_DEBUG, " Readback = %d\n", irq); |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1570 | #endif |
| 1571 | |
Julius Werner | cd49cce | 2019-03-05 16:53:33 -0800 | [diff] [blame] | 1572 | #if CONFIG(PC80_SYSTEM) |
Uwe Hermann | e487047 | 2010-11-04 23:23:47 +0000 | [diff] [blame] | 1573 | /* Change to level triggered. */ |
| 1574 | i8259_configure_irq_trigger(pIntAtoD[line - 1], |
| 1575 | IRQ_LEVEL_TRIGGERED); |
Stefan Reinauer | 5fb6216 | 2010-12-16 23:52:04 +0000 | [diff] [blame] | 1576 | #endif |
Ronald G. Minnich | 6dd6c685 | 2003-10-02 00:08:42 +0000 | [diff] [blame] | 1577 | } |
| 1578 | } |
Stefan Reinauer | 4d933dd | 2009-07-21 21:36:41 +0000 | [diff] [blame] | 1579 | #endif |