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1da177e4 LT |
1 | /* |
2 | * File XmPciLpEvent.h created by Wayne Holm on Mon Jan 15 2001. | |
3 | * | |
4 | * This module handles PCI interrupt events sent by the iSeries Hypervisor. | |
5 | */ | |
6 | ||
7 | #include <linux/config.h> | |
8 | #include <linux/pci.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/threads.h> | |
11 | #include <linux/smp.h> | |
12 | #include <linux/param.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/bootmem.h> | |
15 | #include <linux/ide.h> | |
16 | ||
17 | #include <asm/iSeries/HvTypes.h> | |
18 | #include <asm/iSeries/HvLpEvent.h> | |
19 | #include <asm/iSeries/HvCallPci.h> | |
20 | #include <asm/iSeries/XmPciLpEvent.h> | |
21 | #include <asm/ppcdebug.h> | |
22 | ||
23 | static long Pci_Interrupt_Count; | |
24 | static long Pci_Event_Count; | |
25 | ||
26 | enum XmPciLpEvent_Subtype { | |
27 | XmPciLpEvent_BusCreated = 0, // PHB has been created | |
28 | XmPciLpEvent_BusError = 1, // PHB has failed | |
29 | XmPciLpEvent_BusFailed = 2, // Msg to Secondary, Primary failed bus | |
30 | XmPciLpEvent_NodeFailed = 4, // Multi-adapter bridge has failed | |
31 | XmPciLpEvent_NodeRecovered = 5, // Multi-adapter bridge has recovered | |
32 | XmPciLpEvent_BusRecovered = 12, // PHB has been recovered | |
33 | XmPciLpEvent_UnQuiesceBus = 18, // Secondary bus unqiescing | |
34 | XmPciLpEvent_BridgeError = 21, // Bridge Error | |
35 | XmPciLpEvent_SlotInterrupt = 22 // Slot interrupt | |
36 | }; | |
37 | ||
38 | struct XmPciLpEvent_BusInterrupt { | |
39 | HvBusNumber busNumber; | |
40 | HvSubBusNumber subBusNumber; | |
41 | }; | |
42 | ||
43 | struct XmPciLpEvent_NodeInterrupt { | |
44 | HvBusNumber busNumber; | |
45 | HvSubBusNumber subBusNumber; | |
46 | HvAgentId deviceId; | |
47 | }; | |
48 | ||
49 | struct XmPciLpEvent { | |
50 | struct HvLpEvent hvLpEvent; | |
51 | ||
52 | union { | |
53 | u64 alignData; // Align on an 8-byte boundary | |
54 | ||
55 | struct { | |
56 | u32 fisr; | |
57 | HvBusNumber busNumber; | |
58 | HvSubBusNumber subBusNumber; | |
59 | HvAgentId deviceId; | |
60 | } slotInterrupt; | |
61 | ||
62 | struct XmPciLpEvent_BusInterrupt busFailed; | |
63 | struct XmPciLpEvent_BusInterrupt busRecovered; | |
64 | struct XmPciLpEvent_BusInterrupt busCreated; | |
65 | ||
66 | struct XmPciLpEvent_NodeInterrupt nodeFailed; | |
67 | struct XmPciLpEvent_NodeInterrupt nodeRecovered; | |
68 | ||
69 | } eventData; | |
70 | ||
71 | }; | |
72 | ||
73 | static void intReceived(struct XmPciLpEvent *eventParm, | |
74 | struct pt_regs *regsParm); | |
75 | ||
76 | static void XmPciLpEvent_handler(struct HvLpEvent *eventParm, | |
77 | struct pt_regs *regsParm) | |
78 | { | |
79 | #ifdef CONFIG_PCI | |
80 | #if 0 | |
81 | PPCDBG(PPCDBG_BUSWALK, "XmPciLpEvent_handler, type 0x%x\n", | |
82 | eventParm->xType); | |
83 | #endif | |
84 | ++Pci_Event_Count; | |
85 | ||
86 | if (eventParm && (eventParm->xType == HvLpEvent_Type_PciIo)) { | |
87 | switch (eventParm->xFlags.xFunction) { | |
88 | case HvLpEvent_Function_Int: | |
89 | intReceived((struct XmPciLpEvent *)eventParm, regsParm); | |
90 | break; | |
91 | case HvLpEvent_Function_Ack: | |
92 | printk(KERN_ERR | |
93 | "XmPciLpEvent.c: unexpected ack received\n"); | |
94 | break; | |
95 | default: | |
96 | printk(KERN_ERR | |
97 | "XmPciLpEvent.c: unexpected event function %d\n", | |
98 | (int)eventParm->xFlags.xFunction); | |
99 | break; | |
100 | } | |
101 | } else if (eventParm) | |
102 | printk(KERN_ERR | |
103 | "XmPciLpEvent.c: Unrecognized PCI event type 0x%x\n", | |
104 | (int)eventParm->xType); | |
105 | else | |
106 | printk(KERN_ERR "XmPciLpEvent.c: NULL event received\n"); | |
107 | #endif | |
108 | } | |
109 | ||
110 | static void intReceived(struct XmPciLpEvent *eventParm, | |
111 | struct pt_regs *regsParm) | |
112 | { | |
113 | int irq; | |
114 | ||
115 | ++Pci_Interrupt_Count; | |
116 | #if 0 | |
117 | PPCDBG(PPCDBG_BUSWALK, "PCI: XmPciLpEvent.c: intReceived\n"); | |
118 | #endif | |
119 | ||
120 | switch (eventParm->hvLpEvent.xSubtype) { | |
121 | case XmPciLpEvent_SlotInterrupt: | |
122 | irq = eventParm->hvLpEvent.xCorrelationToken; | |
123 | /* Dispatch the interrupt handlers for this irq */ | |
124 | ppc_irq_dispatch_handler(regsParm, irq); | |
125 | HvCallPci_eoi(eventParm->eventData.slotInterrupt.busNumber, | |
126 | eventParm->eventData.slotInterrupt.subBusNumber, | |
127 | eventParm->eventData.slotInterrupt.deviceId); | |
128 | break; | |
129 | /* Ignore error recovery events for now */ | |
130 | case XmPciLpEvent_BusCreated: | |
131 | printk(KERN_INFO "XmPciLpEvent.c: system bus %d created\n", | |
132 | eventParm->eventData.busCreated.busNumber); | |
133 | break; | |
134 | case XmPciLpEvent_BusError: | |
135 | case XmPciLpEvent_BusFailed: | |
136 | printk(KERN_INFO "XmPciLpEvent.c: system bus %d failed\n", | |
137 | eventParm->eventData.busFailed.busNumber); | |
138 | break; | |
139 | case XmPciLpEvent_BusRecovered: | |
140 | case XmPciLpEvent_UnQuiesceBus: | |
141 | printk(KERN_INFO "XmPciLpEvent.c: system bus %d recovered\n", | |
142 | eventParm->eventData.busRecovered.busNumber); | |
143 | break; | |
144 | case XmPciLpEvent_NodeFailed: | |
145 | case XmPciLpEvent_BridgeError: | |
146 | printk(KERN_INFO | |
147 | "XmPciLpEvent.c: multi-adapter bridge %d/%d/%d failed\n", | |
148 | eventParm->eventData.nodeFailed.busNumber, | |
149 | eventParm->eventData.nodeFailed.subBusNumber, | |
150 | eventParm->eventData.nodeFailed.deviceId); | |
151 | break; | |
152 | case XmPciLpEvent_NodeRecovered: | |
153 | printk(KERN_INFO | |
154 | "XmPciLpEvent.c: multi-adapter bridge %d/%d/%d recovered\n", | |
155 | eventParm->eventData.nodeRecovered.busNumber, | |
156 | eventParm->eventData.nodeRecovered.subBusNumber, | |
157 | eventParm->eventData.nodeRecovered.deviceId); | |
158 | break; | |
159 | default: | |
160 | printk(KERN_ERR | |
161 | "XmPciLpEvent.c: unrecognized event subtype 0x%x\n", | |
162 | eventParm->hvLpEvent.xSubtype); | |
163 | break; | |
164 | } | |
165 | } | |
166 | ||
167 | ||
168 | /* This should be called sometime prior to buswalk (init_IRQ would be good) */ | |
169 | int XmPciLpEvent_init() | |
170 | { | |
171 | int xRc; | |
172 | ||
173 | PPCDBG(PPCDBG_BUSWALK, | |
174 | "XmPciLpEvent_init, Register Event type 0x%04X\n", | |
175 | HvLpEvent_Type_PciIo); | |
176 | ||
177 | xRc = HvLpEvent_registerHandler(HvLpEvent_Type_PciIo, | |
178 | &XmPciLpEvent_handler); | |
179 | if (xRc == 0) { | |
180 | xRc = HvLpEvent_openPath(HvLpEvent_Type_PciIo, 0); | |
181 | if (xRc != 0) | |
182 | printk(KERN_ERR | |
183 | "XmPciLpEvent.c: open event path failed with rc 0x%x\n", | |
184 | xRc); | |
185 | } else | |
186 | printk(KERN_ERR | |
187 | "XmPciLpEvent.c: register handler failed with rc 0x%x\n", | |
188 | xRc); | |
189 | return xRc; | |
190 | } |