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Diffstat (limited to 'arch/x86/pci/irq.c')
-rw-r--r--arch/x86/pci/irq.c120
1 files changed, 82 insertions, 38 deletions
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index dc568c6b83f8..6a06a2eb0597 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -45,7 +45,8 @@ struct irq_router {
45 char *name; 45 char *name;
46 u16 vendor, device; 46 u16 vendor, device;
47 int (*get)(struct pci_dev *router, struct pci_dev *dev, int pirq); 47 int (*get)(struct pci_dev *router, struct pci_dev *dev, int pirq);
48 int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq, int new); 48 int (*set)(struct pci_dev *router, struct pci_dev *dev, int pirq,
49 int new);
49}; 50};
50 51
51struct irq_router_handler { 52struct irq_router_handler {
@@ -77,7 +78,8 @@ static inline struct irq_routing_table *pirq_check_routing_table(u8 *addr)
77 for (i = 0; i < rt->size; i++) 78 for (i = 0; i < rt->size; i++)
78 sum += addr[i]; 79 sum += addr[i];
79 if (!sum) { 80 if (!sum) {
80 DBG(KERN_DEBUG "PCI: Interrupt Routing Table found at 0x%p\n", rt); 81 DBG(KERN_DEBUG "PCI: Interrupt Routing Table found at 0x%p\n",
82 rt);
81 return rt; 83 return rt;
82 } 84 }
83 return NULL; 85 return NULL;
@@ -183,7 +185,8 @@ static unsigned int read_config_nybble(struct pci_dev *router, unsigned offset,
183 return (nr & 1) ? (x >> 4) : (x & 0xf); 185 return (nr & 1) ? (x >> 4) : (x & 0xf);
184} 186}
185 187
186static void write_config_nybble(struct pci_dev *router, unsigned offset, unsigned nr, unsigned int val) 188static void write_config_nybble(struct pci_dev *router, unsigned offset,
189 unsigned nr, unsigned int val)
187{ 190{
188 u8 x; 191 u8 x;
189 unsigned reg = offset + (nr >> 1); 192 unsigned reg = offset + (nr >> 1);
@@ -467,7 +470,8 @@ static int pirq_serverworks_get(struct pci_dev *router, struct pci_dev *dev, int
467 return inb(0xc01) & 0xf; 470 return inb(0xc01) & 0xf;
468} 471}
469 472
470static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) 473static int pirq_serverworks_set(struct pci_dev *router, struct pci_dev *dev,
474 int pirq, int irq)
471{ 475{
472 outb(pirq, 0xc00); 476 outb(pirq, 0xc00);
473 outb(irq, 0xc01); 477 outb(irq, 0xc01);
@@ -660,7 +664,8 @@ static __init int vlsi_router_probe(struct irq_router *r, struct pci_dev *router
660} 664}
661 665
662 666
663static __init int serverworks_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) 667static __init int serverworks_router_probe(struct irq_router *r,
668 struct pci_dev *router, u16 device)
664{ 669{
665 switch (device) { 670 switch (device) {
666 case PCI_DEVICE_ID_SERVERWORKS_OSB4: 671 case PCI_DEVICE_ID_SERVERWORKS_OSB4:
@@ -827,10 +832,12 @@ static void __init pirq_find_router(struct irq_router *r)
827 832
828 for (h = pirq_routers; h->vendor; h++) { 833 for (h = pirq_routers; h->vendor; h++) {
829 /* First look for a router match */ 834 /* First look for a router match */
830 if (rt->rtr_vendor == h->vendor && h->probe(r, pirq_router_dev, rt->rtr_device)) 835 if (rt->rtr_vendor == h->vendor &&
836 h->probe(r, pirq_router_dev, rt->rtr_device))
831 break; 837 break;
832 /* Fall back to a device match */ 838 /* Fall back to a device match */
833 if (pirq_router_dev->vendor == h->vendor && h->probe(r, pirq_router_dev, pirq_router_dev->device)) 839 if (pirq_router_dev->vendor == h->vendor &&
840 h->probe(r, pirq_router_dev, pirq_router_dev->device))
834 break; 841 break;
835 } 842 }
836 printk(KERN_INFO "PCI: Using IRQ router %s [%04x/%04x] at %s\n", 843 printk(KERN_INFO "PCI: Using IRQ router %s [%04x/%04x] at %s\n",
@@ -845,11 +852,13 @@ static void __init pirq_find_router(struct irq_router *r)
845static struct irq_info *pirq_get_info(struct pci_dev *dev) 852static struct irq_info *pirq_get_info(struct pci_dev *dev)
846{ 853{
847 struct irq_routing_table *rt = pirq_table; 854 struct irq_routing_table *rt = pirq_table;
848 int entries = (rt->size - sizeof(struct irq_routing_table)) / sizeof(struct irq_info); 855 int entries = (rt->size - sizeof(struct irq_routing_table)) /
856 sizeof(struct irq_info);
849 struct irq_info *info; 857 struct irq_info *info;
850 858
851 for (info = rt->slots; entries--; info++) 859 for (info = rt->slots; entries--; info++)
852 if (info->bus == dev->bus->number && PCI_SLOT(info->devfn) == PCI_SLOT(dev->devfn)) 860 if (info->bus == dev->bus->number &&
861 PCI_SLOT(info->devfn) == PCI_SLOT(dev->devfn))
853 return info; 862 return info;
854 return NULL; 863 return NULL;
855} 864}
@@ -890,7 +899,8 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
890 DBG(" -> not routed\n" KERN_DEBUG); 899 DBG(" -> not routed\n" KERN_DEBUG);
891 return 0; 900 return 0;
892 } 901 }
893 DBG(" -> PIRQ %02x, mask %04x, excl %04x", pirq, mask, pirq_table->exclusive_irqs); 902 DBG(" -> PIRQ %02x, mask %04x, excl %04x", pirq, mask,
903 pirq_table->exclusive_irqs);
894 mask &= pcibios_irq_mask; 904 mask &= pcibios_irq_mask;
895 905
896 /* Work around broken HP Pavilion Notebooks which assign USB to 906 /* Work around broken HP Pavilion Notebooks which assign USB to
@@ -903,7 +913,8 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
903 } 913 }
904 914
905 /* same for Acer Travelmate 360, but with CB and irq 11 -> 10 */ 915 /* same for Acer Travelmate 360, but with CB and irq 11 -> 10 */
906 if (acer_tm360_irqrouting && dev->irq == 11 && dev->vendor == PCI_VENDOR_ID_O2) { 916 if (acer_tm360_irqrouting && dev->irq == 11 &&
917 dev->vendor == PCI_VENDOR_ID_O2) {
907 pirq = 0x68; 918 pirq = 0x68;
908 mask = 0x400; 919 mask = 0x400;
909 dev->irq = r->get(pirq_router_dev, dev, pirq); 920 dev->irq = r->get(pirq_router_dev, dev, pirq);
@@ -920,15 +931,16 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
920 newirq = 0; 931 newirq = 0;
921 else 932 else
922 printk("\n" KERN_WARNING 933 printk("\n" KERN_WARNING
923 "PCI: IRQ %i for device %s doesn't match PIRQ mask " 934 "PCI: IRQ %i for device %s doesn't match PIRQ mask - try pci=usepirqmask\n"
924 "- try pci=usepirqmask\n" KERN_DEBUG, newirq, 935 KERN_DEBUG, newirq,
925 pci_name(dev)); 936 pci_name(dev));
926 } 937 }
927 if (!newirq && assign) { 938 if (!newirq && assign) {
928 for (i = 0; i < 16; i++) { 939 for (i = 0; i < 16; i++) {
929 if (!(mask & (1 << i))) 940 if (!(mask & (1 << i)))
930 continue; 941 continue;
931 if (pirq_penalty[i] < pirq_penalty[newirq] && can_request_irq(i, IRQF_SHARED)) 942 if (pirq_penalty[i] < pirq_penalty[newirq] &&
943 can_request_irq(i, IRQF_SHARED))
932 newirq = i; 944 newirq = i;
933 } 945 }
934 } 946 }
@@ -944,7 +956,8 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
944 DBG(" -> got IRQ %d\n", irq); 956 DBG(" -> got IRQ %d\n", irq);
945 msg = "Found"; 957 msg = "Found";
946 eisa_set_level_irq(irq); 958 eisa_set_level_irq(irq);
947 } else if (newirq && r->set && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) { 959 } else if (newirq && r->set &&
960 (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) {
948 DBG(" -> assigning IRQ %d", newirq); 961 DBG(" -> assigning IRQ %d", newirq);
949 if (r->set(pirq_router_dev, dev, pirq, newirq)) { 962 if (r->set(pirq_router_dev, dev, pirq, newirq)) {
950 eisa_set_level_irq(newirq); 963 eisa_set_level_irq(newirq);
@@ -962,7 +975,8 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
962 } else 975 } else
963 return 0; 976 return 0;
964 } 977 }
965 printk(KERN_INFO "PCI: %s IRQ %d for device %s\n", msg, irq, pci_name(dev)); 978 printk(KERN_INFO "PCI: %s IRQ %d for device %s\n", msg, irq,
979 pci_name(dev));
966 980
967 /* Update IRQ for all devices with the same pirq value */ 981 /* Update IRQ for all devices with the same pirq value */
968 while ((dev2 = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev2)) != NULL) { 982 while ((dev2 = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev2)) != NULL) {
@@ -974,7 +988,10 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
974 if (!info) 988 if (!info)
975 continue; 989 continue;
976 if (info->irq[pin].link == pirq) { 990 if (info->irq[pin].link == pirq) {
977 /* We refuse to override the dev->irq information. Give a warning! */ 991 /*
992 * We refuse to override the dev->irq
993 * information. Give a warning!
994 */
978 if (dev2->irq && dev2->irq != irq && \ 995 if (dev2->irq && dev2->irq != irq && \
979 (!(pci_probe & PCI_USE_PIRQ_MASK) || \ 996 (!(pci_probe & PCI_USE_PIRQ_MASK) || \
980 ((1 << dev2->irq) & mask))) { 997 ((1 << dev2->irq) & mask))) {
@@ -987,7 +1004,9 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
987 dev2->irq = irq; 1004 dev2->irq = irq;
988 pirq_penalty[irq]++; 1005 pirq_penalty[irq]++;
989 if (dev != dev2) 1006 if (dev != dev2)
990 printk(KERN_INFO "PCI: Sharing IRQ %d with %s\n", irq, pci_name(dev2)); 1007 printk(KERN_INFO
1008 "PCI: Sharing IRQ %d with %s\n",
1009 irq, pci_name(dev2));
991 } 1010 }
992 } 1011 }
993 return 1; 1012 return 1;
@@ -1001,15 +1020,21 @@ static void __init pcibios_fixup_irqs(void)
1001 DBG(KERN_DEBUG "PCI: IRQ fixup\n"); 1020 DBG(KERN_DEBUG "PCI: IRQ fixup\n");
1002 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) { 1021 while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
1003 /* 1022 /*
1004 * If the BIOS has set an out of range IRQ number, just ignore it. 1023 * If the BIOS has set an out of range IRQ number, just
1005 * Also keep track of which IRQ's are already in use. 1024 * ignore it. Also keep track of which IRQ's are
1025 * already in use.
1006 */ 1026 */
1007 if (dev->irq >= 16) { 1027 if (dev->irq >= 16) {
1008 DBG(KERN_DEBUG "%s: ignoring bogus IRQ %d\n", pci_name(dev), dev->irq); 1028 DBG(KERN_DEBUG "%s: ignoring bogus IRQ %d\n",
1029 pci_name(dev), dev->irq);
1009 dev->irq = 0; 1030 dev->irq = 0;
1010 } 1031 }
1011 /* If the IRQ is already assigned to a PCI device, ignore its ISA use penalty */ 1032 /*
1012 if (pirq_penalty[dev->irq] >= 100 && pirq_penalty[dev->irq] < 100000) 1033 * If the IRQ is already assigned to a PCI device,
1034 * ignore its ISA use penalty
1035 */
1036 if (pirq_penalty[dev->irq] >= 100 &&
1037 pirq_penalty[dev->irq] < 100000)
1013 pirq_penalty[dev->irq] = 0; 1038 pirq_penalty[dev->irq] = 0;
1014 pirq_penalty[dev->irq]++; 1039 pirq_penalty[dev->irq]++;
1015 } 1040 }
@@ -1025,8 +1050,13 @@ static void __init pcibios_fixup_irqs(void)
1025 int irq; 1050 int irq;
1026 1051
1027 if (pin) { 1052 if (pin) {
1028 pin--; /* interrupt pins are numbered starting from 1 */ 1053 /*
1029 irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin); 1054 * interrupt pins are numbered starting
1055 * from 1
1056 */
1057 pin--;
1058 irq = IO_APIC_get_PCI_irq_vector(dev->bus->number,
1059 PCI_SLOT(dev->devfn), pin);
1030 /* 1060 /*
1031 * Busses behind bridges are typically not listed in the MP-table. 1061 * Busses behind bridges are typically not listed in the MP-table.
1032 * In this case we have to look up the IRQ based on the parent bus, 1062 * In this case we have to look up the IRQ based on the parent bus,
@@ -1067,7 +1097,8 @@ static int __init fix_broken_hp_bios_irq9(const struct dmi_system_id *d)
1067{ 1097{
1068 if (!broken_hp_bios_irq9) { 1098 if (!broken_hp_bios_irq9) {
1069 broken_hp_bios_irq9 = 1; 1099 broken_hp_bios_irq9 = 1;
1070 printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident); 1100 printk(KERN_INFO "%s detected - fixing broken IRQ routing\n",
1101 d->ident);
1071 } 1102 }
1072 return 0; 1103 return 0;
1073} 1104}
@@ -1080,7 +1111,8 @@ static int __init fix_acer_tm360_irqrouting(const struct dmi_system_id *d)
1080{ 1111{
1081 if (!acer_tm360_irqrouting) { 1112 if (!acer_tm360_irqrouting) {
1082 acer_tm360_irqrouting = 1; 1113 acer_tm360_irqrouting = 1;
1083 printk(KERN_INFO "%s detected - fixing broken IRQ routing\n", d->ident); 1114 printk(KERN_INFO "%s detected - fixing broken IRQ routing\n",
1115 d->ident);
1084 } 1116 }
1085 return 0; 1117 return 0;
1086} 1118}
@@ -1092,7 +1124,8 @@ static struct dmi_system_id __initdata pciirq_dmi_table[] = {
1092 .matches = { 1124 .matches = {
1093 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1125 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1094 DMI_MATCH(DMI_BIOS_VERSION, "GE.M1.03"), 1126 DMI_MATCH(DMI_BIOS_VERSION, "GE.M1.03"),
1095 DMI_MATCH(DMI_PRODUCT_VERSION, "HP Pavilion Notebook Model GE"), 1127 DMI_MATCH(DMI_PRODUCT_VERSION,
1128 "HP Pavilion Notebook Model GE"),
1096 DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"), 1129 DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
1097 }, 1130 },
1098 }, 1131 },
@@ -1131,7 +1164,10 @@ int __init pcibios_irq_init(void)
1131 if (!(pirq_table->exclusive_irqs & (1 << i))) 1164 if (!(pirq_table->exclusive_irqs & (1 << i)))
1132 pirq_penalty[i] += 100; 1165 pirq_penalty[i] += 100;
1133 } 1166 }
1134 /* If we're using the I/O APIC, avoid using the PCI IRQ routing table */ 1167 /*
1168 * If we're using the I/O APIC, avoid using the PCI IRQ
1169 * routing table
1170 */
1135 if (io_apic_assign_pci_irqs) 1171 if (io_apic_assign_pci_irqs)
1136 pirq_table = NULL; 1172 pirq_table = NULL;
1137 } 1173 }
@@ -1175,7 +1211,7 @@ static int pirq_enable_irq(struct pci_dev *dev)
1175 if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) { 1211 if (pin && !pcibios_lookup_irq(dev, 1) && !dev->irq) {
1176 char *msg = ""; 1212 char *msg = "";
1177 1213
1178 pin--; /* interrupt pins are numbered starting from 1 */ 1214 pin--; /* interrupt pins are numbered starting from 1 */
1179 1215
1180 if (io_apic_assign_pci_irqs) { 1216 if (io_apic_assign_pci_irqs) {
1181 int irq; 1217 int irq;
@@ -1195,13 +1231,16 @@ static int pirq_enable_irq(struct pci_dev *dev)
1195 irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number, 1231 irq = IO_APIC_get_PCI_irq_vector(bridge->bus->number,
1196 PCI_SLOT(bridge->devfn), pin); 1232 PCI_SLOT(bridge->devfn), pin);
1197 if (irq >= 0) 1233 if (irq >= 0)
1198 printk(KERN_WARNING "PCI: using PPB %s[%c] to get irq %d\n", 1234 printk(KERN_WARNING
1199 pci_name(bridge), 'A' + pin, irq); 1235 "PCI: using PPB %s[%c] to get irq %d\n",
1236 pci_name(bridge),
1237 'A' + pin, irq);
1200 dev = bridge; 1238 dev = bridge;
1201 } 1239 }
1202 dev = temp_dev; 1240 dev = temp_dev;
1203 if (irq >= 0) { 1241 if (irq >= 0) {
1204 printk(KERN_INFO "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n", 1242 printk(KERN_INFO
1243 "PCI->APIC IRQ transform: %s[%c] -> IRQ %d\n",
1205 pci_name(dev), 'A' + pin, irq); 1244 pci_name(dev), 'A' + pin, irq);
1206 dev->irq = irq; 1245 dev->irq = irq;
1207 return 0; 1246 return 0;
@@ -1212,12 +1251,17 @@ static int pirq_enable_irq(struct pci_dev *dev)
1212 else 1251 else
1213 msg = " Please try using pci=biosirq."; 1252 msg = " Please try using pci=biosirq.";
1214 1253
1215 /* With IDE legacy devices the IRQ lookup failure is not a problem.. */ 1254 /*
1216 if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE && !(dev->class & 0x5)) 1255 * With IDE legacy devices the IRQ lookup failure is not
1256 * a problem..
1257 */
1258 if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE &&
1259 !(dev->class & 0x5))
1217 return 0; 1260 return 0;
1218 1261
1219 printk(KERN_WARNING "PCI: No IRQ known for interrupt pin %c of device %s.%s\n", 1262 printk(KERN_WARNING
1220 'A' + pin, pci_name(dev), msg); 1263 "PCI: No IRQ known for interrupt pin %c of device %s.%s\n",
1264 'A' + pin, pci_name(dev), msg);
1221 } 1265 }
1222 return 0; 1266 return 0;
1223} 1267}
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-09 09:15:17 -0500