Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pci_irq.c - ACPI PCI Interrupt Routing ($Revision: 11 $) |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * Copyright (C) 2002 Dominik Brodowski <devel@brodo.de> |
| 7 | * |
| 8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or (at |
| 13 | * your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License along |
| 21 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 23 | * |
| 24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 25 | */ |
| 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 28 | #include <linux/dmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/kernel.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/init.h> |
| 32 | #include <linux/types.h> |
| 33 | #include <linux/proc_fs.h> |
| 34 | #include <linux/spinlock.h> |
| 35 | #include <linux/pm.h> |
| 36 | #include <linux/pci.h> |
| 37 | #include <linux/acpi.h> |
| 38 | #include <acpi/acpi_bus.h> |
| 39 | #include <acpi/acpi_drivers.h> |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define _COMPONENT ACPI_PCI_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 42 | ACPI_MODULE_NAME("pci_irq"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Bjorn Helgaas | f748baf | 2008-12-08 21:30:31 -0700 | [diff] [blame] | 44 | struct acpi_prt_entry { |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 45 | struct list_head list; |
Bjorn Helgaas | f748baf | 2008-12-08 21:30:31 -0700 | [diff] [blame] | 46 | struct acpi_pci_id id; |
| 47 | u8 pin; |
Bjorn Helgaas | 4eaf6db | 2008-12-08 21:31:27 -0700 | [diff] [blame] | 48 | acpi_handle link; |
| 49 | u32 index; /* GSI, or link _CRS index */ |
Bjorn Helgaas | f748baf | 2008-12-08 21:30:31 -0700 | [diff] [blame] | 50 | }; |
| 51 | |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 52 | static LIST_HEAD(acpi_prt_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | static DEFINE_SPINLOCK(acpi_prt_lock); |
| 54 | |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 55 | static inline char pin_name(int pin) |
| 56 | { |
Bjorn Helgaas | e64e9db | 2008-12-08 21:30:41 -0700 | [diff] [blame] | 57 | return 'A' + pin - 1; |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 58 | } |
| 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | /* -------------------------------------------------------------------------- |
| 61 | PCI IRQ Routing Table (PRT) Support |
| 62 | -------------------------------------------------------------------------- */ |
| 63 | |
Bjorn Helgaas | 063563b | 2008-12-08 21:30:51 -0700 | [diff] [blame] | 64 | static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(struct pci_dev *dev, |
| 65 | int pin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 67 | struct acpi_prt_entry *entry; |
Bjorn Helgaas | 063563b | 2008-12-08 21:30:51 -0700 | [diff] [blame] | 68 | int segment = pci_domain_nr(dev->bus); |
| 69 | int bus = dev->bus->number; |
| 70 | int device = PCI_SLOT(dev->devfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | spin_lock(&acpi_prt_lock); |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 73 | list_for_each_entry(entry, &acpi_prt_list, list) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 74 | if ((segment == entry->id.segment) |
| 75 | && (bus == entry->id.bus) |
| 76 | && (device == entry->id.device) |
| 77 | && (pin == entry->pin)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | spin_unlock(&acpi_prt_lock); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 79 | return entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | } |
| 81 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | spin_unlock(&acpi_prt_lock); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 83 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 86 | /* http://bugzilla.kernel.org/show_bug.cgi?id=4773 */ |
| 87 | static struct dmi_system_id medion_md9580[] = { |
| 88 | { |
| 89 | .ident = "Medion MD9580-F laptop", |
| 90 | .matches = { |
| 91 | DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"), |
| 92 | DMI_MATCH(DMI_PRODUCT_NAME, "A555"), |
| 93 | }, |
| 94 | }, |
| 95 | { } |
| 96 | }; |
| 97 | |
| 98 | /* http://bugzilla.kernel.org/show_bug.cgi?id=5044 */ |
| 99 | static struct dmi_system_id dell_optiplex[] = { |
| 100 | { |
| 101 | .ident = "Dell Optiplex GX1", |
| 102 | .matches = { |
| 103 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
| 104 | DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX1 600S+"), |
| 105 | }, |
| 106 | }, |
| 107 | { } |
| 108 | }; |
| 109 | |
| 110 | /* http://bugzilla.kernel.org/show_bug.cgi?id=10138 */ |
| 111 | static struct dmi_system_id hp_t5710[] = { |
| 112 | { |
| 113 | .ident = "HP t5710", |
| 114 | .matches = { |
| 115 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 116 | DMI_MATCH(DMI_PRODUCT_NAME, "hp t5000 series"), |
| 117 | DMI_MATCH(DMI_BOARD_NAME, "098Ch"), |
| 118 | }, |
| 119 | }, |
| 120 | { } |
| 121 | }; |
| 122 | |
| 123 | struct prt_quirk { |
| 124 | struct dmi_system_id *system; |
| 125 | unsigned int segment; |
| 126 | unsigned int bus; |
| 127 | unsigned int device; |
| 128 | unsigned char pin; |
| 129 | char *source; /* according to BIOS */ |
| 130 | char *actual_source; |
| 131 | }; |
| 132 | |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 133 | #define PCI_INTX_PIN(c) (c - 'A' + 1) |
| 134 | |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 135 | /* |
| 136 | * These systems have incorrect _PRT entries. The BIOS claims the PCI |
| 137 | * interrupt at the listed segment/bus/device/pin is connected to the first |
| 138 | * link device, but it is actually connected to the second. |
| 139 | */ |
| 140 | static struct prt_quirk prt_quirks[] = { |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 141 | { medion_md9580, 0, 0, 9, PCI_INTX_PIN('A'), |
Bjorn Helgaas | b97d480 | 2008-03-25 11:21:11 -0600 | [diff] [blame] | 142 | "\\_SB_.PCI0.ISA_.LNKA", |
| 143 | "\\_SB_.PCI0.ISA_.LNKB"}, |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 144 | { dell_optiplex, 0, 0, 0xd, PCI_INTX_PIN('A'), |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 145 | "\\_SB_.LNKB", |
| 146 | "\\_SB_.LNKA"}, |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 147 | { hp_t5710, 0, 0, 1, PCI_INTX_PIN('A'), |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 148 | "\\_SB_.PCI0.LNK1", |
| 149 | "\\_SB_.PCI0.LNK3"}, |
| 150 | }; |
| 151 | |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame^] | 152 | static void do_prt_fixups(struct acpi_prt_entry *entry, |
| 153 | struct acpi_pci_routing_table *prt) |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 154 | { |
| 155 | int i; |
| 156 | struct prt_quirk *quirk; |
| 157 | |
| 158 | for (i = 0; i < ARRAY_SIZE(prt_quirks); i++) { |
| 159 | quirk = &prt_quirks[i]; |
| 160 | |
| 161 | /* All current quirks involve link devices, not GSIs */ |
| 162 | if (!prt->source) |
| 163 | continue; |
| 164 | |
| 165 | if (dmi_check_system(quirk->system) && |
| 166 | entry->id.segment == quirk->segment && |
| 167 | entry->id.bus == quirk->bus && |
| 168 | entry->id.device == quirk->device && |
Bjorn Helgaas | c458033 | 2008-12-08 21:30:46 -0700 | [diff] [blame] | 169 | entry->pin == quirk->pin && |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 170 | !strcmp(prt->source, quirk->source) && |
| 171 | strlen(prt->source) >= strlen(quirk->actual_source)) { |
| 172 | printk(KERN_WARNING PREFIX "firmware reports " |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 173 | "%04x:%02x:%02x PCI INT %c connected to %s; " |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 174 | "changing to %s\n", |
| 175 | entry->id.segment, entry->id.bus, |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 176 | entry->id.device, pin_name(entry->pin), |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 177 | prt->source, quirk->actual_source); |
| 178 | strcpy(prt->source, quirk->actual_source); |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame^] | 183 | static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus, |
| 184 | struct acpi_pci_routing_table *prt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 186 | struct acpi_prt_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 188 | entry = kzalloc(sizeof(struct acpi_prt_entry), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 190 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Bjorn Helgaas | e64e9db | 2008-12-08 21:30:41 -0700 | [diff] [blame] | 192 | /* |
| 193 | * Note that the _PRT uses 0=INTA, 1=INTB, etc, while PCI uses |
| 194 | * 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert |
| 195 | * it here. |
| 196 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | entry->id.segment = segment; |
| 198 | entry->id.bus = bus; |
| 199 | entry->id.device = (prt->address >> 16) & 0xFFFF; |
Bjorn Helgaas | e64e9db | 2008-12-08 21:30:41 -0700 | [diff] [blame] | 200 | entry->pin = prt->pin + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
Bjorn Helgaas | 391df5d | 2008-03-11 13:45:15 -0700 | [diff] [blame] | 202 | do_prt_fixups(entry, prt); |
| 203 | |
Bjorn Helgaas | 4eaf6db | 2008-12-08 21:31:27 -0700 | [diff] [blame] | 204 | entry->index = prt->source_index; |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | /* |
| 207 | * Type 1: Dynamic |
| 208 | * --------------- |
| 209 | * The 'source' field specifies the PCI interrupt link device used to |
| 210 | * configure the IRQ assigned to this slot|dev|pin. The 'source_index' |
| 211 | * indicates which resource descriptor in the resource template (of |
| 212 | * the link device) this interrupt is allocated from. |
| 213 | * |
| 214 | * NOTE: Don't query the Link Device for IRQ information at this time |
| 215 | * because Link Device enumeration may not have occurred yet |
| 216 | * (e.g. exists somewhere 'below' this _PRT entry in the ACPI |
| 217 | * namespace). |
| 218 | */ |
Bjorn Helgaas | 4eaf6db | 2008-12-08 21:31:27 -0700 | [diff] [blame] | 219 | if (prt->source[0]) |
| 220 | acpi_get_handle(handle, prt->source, &entry->link); |
| 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | /* |
| 223 | * Type 2: Static |
| 224 | * -------------- |
| 225 | * The 'source' field is NULL, and the 'source_index' field specifies |
| 226 | * the IRQ value, which is hardwired to specific interrupt inputs on |
| 227 | * the interrupt controller. |
| 228 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
| 230 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INFO, |
Bjorn Helgaas | 21a5328 | 2008-12-08 21:30:05 -0700 | [diff] [blame] | 231 | " %04x:%02x:%02x[%c] -> %s[%d]\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 232 | entry->id.segment, entry->id.bus, |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 233 | entry->id.device, pin_name(entry->pin), |
Bjorn Helgaas | 4eaf6db | 2008-12-08 21:31:27 -0700 | [diff] [blame] | 234 | prt->source, entry->index)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
| 236 | spin_lock(&acpi_prt_lock); |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 237 | list_add_tail(&entry->list, &acpi_prt_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | spin_unlock(&acpi_prt_lock); |
| 239 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 240 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 243 | int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 245 | acpi_status status; |
| 246 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 247 | struct acpi_pci_routing_table *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 249 | /* 'handle' is the _PRT's parent (root bridge or PCI-PCI bridge) */ |
| 250 | status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
| 251 | if (ACPI_FAILURE(status)) |
| 252 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | printk(KERN_DEBUG "ACPI: PCI Interrupt Routing Table [%s._PRT]\n", |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 255 | (char *) buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 257 | kfree(buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 259 | buffer.length = ACPI_ALLOCATE_BUFFER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | buffer.pointer = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | status = acpi_get_irq_routing_table(handle, &buffer); |
| 263 | if (ACPI_FAILURE(status)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 264 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRT [%s]", |
| 265 | acpi_format_exception(status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | kfree(buffer.pointer); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 267 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
| 269 | |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 270 | entry = buffer.pointer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | while (entry && (entry->length > 0)) { |
| 272 | acpi_pci_irq_add_entry(handle, segment, bus, entry); |
| 273 | entry = (struct acpi_pci_routing_table *) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 274 | ((unsigned long)entry + entry->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Bjorn Helgaas | 2320ac6 | 2008-12-08 21:30:15 -0700 | [diff] [blame] | 277 | kfree(buffer.pointer); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 278 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 281 | void acpi_pci_irq_del_prt(int segment, int bus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | { |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 283 | struct acpi_prt_entry *entry, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 285 | printk(KERN_DEBUG |
Bjorn Helgaas | 21a5328 | 2008-12-08 21:30:05 -0700 | [diff] [blame] | 286 | "ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n", |
| 287 | segment, bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | spin_lock(&acpi_prt_lock); |
Bjorn Helgaas | 3604a9f | 2008-12-08 21:31:21 -0700 | [diff] [blame] | 289 | list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) { |
| 290 | if (segment == entry->id.segment && bus == entry->id.bus) { |
| 291 | list_del(&entry->list); |
| 292 | kfree(entry); |
| 293 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
| 295 | spin_unlock(&acpi_prt_lock); |
| 296 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | /* -------------------------------------------------------------------------- |
| 299 | PCI Interrupt Routing Support |
| 300 | -------------------------------------------------------------------------- */ |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame^] | 301 | static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 303 | struct acpi_prt_entry *entry; |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 304 | struct pci_dev *bridge; |
| 305 | u8 bridge_pin, orig_pin = pin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
Bjorn Helgaas | 063563b | 2008-12-08 21:30:51 -0700 | [diff] [blame] | 307 | entry = acpi_pci_irq_find_prt_entry(dev, pin); |
Bjorn Helgaas | 3b1ea18 | 2008-12-08 21:31:06 -0700 | [diff] [blame] | 308 | if (entry) { |
| 309 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n", |
Bjorn Helgaas | 1350487 | 2008-12-08 21:30:56 -0700 | [diff] [blame] | 310 | pci_name(dev), pin_name(pin))); |
Bjorn Helgaas | 3b1ea18 | 2008-12-08 21:31:06 -0700 | [diff] [blame] | 311 | return entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | /* |
| 315 | * Attempt to derive an IRQ for this device from a parent bridge's |
| 316 | * PCI interrupt routing entry (eg. yenta bridge and add-in card bridge). |
| 317 | */ |
Bjorn Helgaas | ee40136 | 2008-12-08 21:31:11 -0700 | [diff] [blame] | 318 | bridge = dev->bus->self; |
| 319 | while (bridge) { |
| 320 | pin = (((pin - 1) + PCI_SLOT(dev->devfn)) % 4) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
| 322 | if ((bridge->class >> 8) == PCI_CLASS_BRIDGE_CARDBUS) { |
| 323 | /* PC card has the same IRQ as its cardbridge */ |
Kristen Accardi | 8015a01 | 2005-11-02 16:24:35 -0800 | [diff] [blame] | 324 | bridge_pin = bridge->pin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | if (!bridge_pin) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 326 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 327 | "No interrupt pin configured for device %s\n", |
| 328 | pci_name(bridge))); |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 329 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | pin = bridge_pin; |
| 332 | } |
| 333 | |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 334 | entry = acpi_pci_irq_find_prt_entry(bridge, pin); |
Bjorn Helgaas | 3b1ea18 | 2008-12-08 21:31:06 -0700 | [diff] [blame] | 335 | if (entry) { |
| 336 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 337 | "Derived GSI for %s INT %c from %s\n", |
| 338 | pci_name(dev), pin_name(orig_pin), |
| 339 | pci_name(bridge))); |
| 340 | return entry; |
| 341 | } |
Bjorn Helgaas | ee40136 | 2008-12-08 21:31:11 -0700 | [diff] [blame] | 342 | |
| 343 | dev = bridge; |
| 344 | bridge = dev->bus->self; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | |
Bjorn Helgaas | 3b1ea18 | 2008-12-08 21:31:06 -0700 | [diff] [blame] | 347 | dev_warn(&dev->dev, "can't derive routing for PCI INT %c\n", |
| 348 | pin_name(orig_pin)); |
| 349 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | } |
| 351 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 352 | int acpi_pci_irq_enable(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | { |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 354 | struct acpi_prt_entry *entry; |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame^] | 355 | int gsi; |
| 356 | u8 pin; |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 357 | int triggering = ACPI_LEVEL_SENSITIVE; |
| 358 | int polarity = ACPI_ACTIVE_LOW; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 359 | char *link = NULL; |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 360 | char link_desc[16]; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 361 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Kristen Accardi | 8015a01 | 2005-11-02 16:24:35 -0800 | [diff] [blame] | 363 | pin = dev->pin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (!pin) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 365 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 366 | "No interrupt pin configured for device %s\n", |
| 367 | pci_name(dev))); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 368 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 371 | entry = acpi_pci_irq_lookup(dev, pin); |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 372 | if (!entry) { |
Alan Cox | 96c2a87 | 2008-01-10 22:49:58 -0500 | [diff] [blame] | 373 | /* |
| 374 | * IDE legacy mode controller IRQs are magic. Why do compat |
| 375 | * extensions always make such a nasty mess. |
| 376 | */ |
| 377 | if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && |
| 378 | (dev->class & 0x05) == 0) |
| 379 | return 0; |
| 380 | } |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 381 | |
Bjorn Helgaas | 74f82af | 2008-12-08 21:31:32 -0700 | [diff] [blame] | 382 | if (entry) { |
| 383 | if (entry->link) |
| 384 | gsi = acpi_pci_link_allocate_irq(entry->link, |
| 385 | entry->index, |
| 386 | &triggering, &polarity, |
| 387 | &link); |
| 388 | else |
| 389 | gsi = entry->index; |
| 390 | } else |
Bjorn Helgaas | 5697b7c | 2008-12-08 21:31:16 -0700 | [diff] [blame] | 391 | gsi = -1; |
| 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | /* |
| 394 | * No IRQ known to the ACPI subsystem - maybe the BIOS / |
| 395 | * driver reported one, then use it. Exit in any case. |
| 396 | */ |
Bjorn Helgaas | c13f889 | 2008-12-08 21:30:26 -0700 | [diff] [blame] | 397 | if (gsi < 0) { |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 398 | dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | /* Interrupt Line values above 0xF are forbidden */ |
Linus Torvalds | 44f8e1a | 2005-07-02 10:35:33 -0700 | [diff] [blame] | 400 | if (dev->irq > 0 && (dev->irq <= 0xF)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | printk(" - using IRQ %d\n", dev->irq); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 402 | acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE, |
| 403 | ACPI_ACTIVE_LOW); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 404 | return 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 405 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | printk("\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 407 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 409 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
Bjorn Helgaas | c13f889 | 2008-12-08 21:30:26 -0700 | [diff] [blame] | 411 | rc = acpi_register_gsi(gsi, triggering, polarity); |
Kenji Kaneshige | 349f0d5 | 2005-07-28 14:42:00 -0400 | [diff] [blame] | 412 | if (rc < 0) { |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 413 | dev_warn(&dev->dev, "PCI INT %c: failed to register GSI\n", |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 414 | pin_name(pin)); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 415 | return rc; |
Kenji Kaneshige | 349f0d5 | 2005-07-28 14:42:00 -0400 | [diff] [blame] | 416 | } |
| 417 | dev->irq = rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | if (link) |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 420 | snprintf(link_desc, sizeof(link_desc), " -> Link[%s]", link); |
| 421 | else |
| 422 | link_desc[0] = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 424 | dev_info(&dev->dev, "PCI INT %c%s -> GSI %u (%s, %s) -> IRQ %d\n", |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 425 | pin_name(pin), link_desc, gsi, |
Bjorn Helgaas | c83642d | 2008-06-27 08:45:39 -0600 | [diff] [blame] | 426 | (triggering == ACPI_LEVEL_SENSITIVE) ? "level" : "edge", |
| 427 | (polarity == ACPI_ACTIVE_LOW) ? "low" : "high", dev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 429 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 431 | |
David Shaohua Li | 87bec66 | 2005-07-27 23:02:00 -0400 | [diff] [blame] | 432 | /* FIXME: implement x86/x86_64 version */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 433 | void __attribute__ ((weak)) acpi_unregister_gsi(u32 i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | void acpi_pci_irq_disable(struct pci_dev *dev) |
| 438 | { |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 439 | struct acpi_prt_entry *entry; |
Bjorn Helgaas | 3f0f3c2 | 2008-12-08 21:31:37 -0700 | [diff] [blame^] | 440 | int gsi; |
| 441 | u8 pin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Kristen Accardi | 8015a01 | 2005-11-02 16:24:35 -0800 | [diff] [blame] | 443 | pin = dev->pin; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | if (!pin) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 445 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 447 | entry = acpi_pci_irq_lookup(dev, pin); |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 448 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 449 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
Bjorn Helgaas | 74f82af | 2008-12-08 21:31:32 -0700 | [diff] [blame] | 451 | if (entry->link) |
| 452 | gsi = acpi_pci_link_free_irq(entry->link); |
| 453 | else |
| 454 | gsi = entry->index; |
Bjorn Helgaas | beba8a6 | 2008-12-08 21:31:01 -0700 | [diff] [blame] | 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | /* |
| 457 | * TBD: It might be worth clearing dev->irq by magic constant |
| 458 | * (e.g. PCI_UNDEFINED_IRQ). |
| 459 | */ |
| 460 | |
Bjorn Helgaas | cf68b80 | 2008-12-08 21:30:36 -0700 | [diff] [blame] | 461 | dev_info(&dev->dev, "PCI INT %c disabled\n", pin_name(pin)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | acpi_unregister_gsi(gsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | } |