diff options
Diffstat (limited to 'arch/ppc64/kernel/XmPciLpEvent.c')
-rw-r--r-- | arch/ppc64/kernel/XmPciLpEvent.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/XmPciLpEvent.c b/arch/ppc64/kernel/XmPciLpEvent.c new file mode 100644 index 000000000000..809c9bc6678b --- /dev/null +++ b/arch/ppc64/kernel/XmPciLpEvent.c | |||
@@ -0,0 +1,190 @@ | |||
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 | } | ||