Commit | Line | Data |
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cbc0dd1f JG |
1 | /* |
2 | * Copyright IBM Corp. 2012 | |
3 | * | |
4 | * Author(s): | |
5 | * Jan Glauber <jang@linux.vnet.ibm.com> | |
6 | */ | |
7 | ||
896cb7e6 GS |
8 | #define KMSG_COMPONENT "zpci" |
9 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
cbc0dd1f JG |
10 | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/pci.h> | |
1f1dcbd4 | 13 | #include <asm/pci_debug.h> |
d795ddad | 14 | #include <asm/sclp.h> |
cbc0dd1f JG |
15 | |
16 | /* Content Code Description for PCI Function Error */ | |
17 | struct zpci_ccdf_err { | |
18 | u32 reserved1; | |
19 | u32 fh; /* function handle */ | |
20 | u32 fid; /* function id */ | |
21 | u32 ett : 4; /* expected table type */ | |
22 | u32 mvn : 12; /* MSI vector number */ | |
23 | u32 dmaas : 8; /* DMA address space */ | |
24 | u32 : 6; | |
25 | u32 q : 1; /* event qualifier */ | |
26 | u32 rw : 1; /* read/write */ | |
27 | u64 faddr; /* failing address */ | |
28 | u32 reserved3; | |
29 | u16 reserved4; | |
30 | u16 pec; /* PCI event code */ | |
31 | } __packed; | |
32 | ||
33 | /* Content Code Description for PCI Function Availability */ | |
34 | struct zpci_ccdf_avail { | |
35 | u32 reserved1; | |
36 | u32 fh; /* function handle */ | |
37 | u32 fid; /* function id */ | |
38 | u32 reserved2; | |
39 | u32 reserved3; | |
40 | u32 reserved4; | |
41 | u32 reserved5; | |
42 | u16 reserved6; | |
43 | u16 pec; /* PCI event code */ | |
44 | } __packed; | |
45 | ||
aa3b7c29 | 46 | static void __zpci_event_error(struct zpci_ccdf_err *ccdf) |
cbc0dd1f | 47 | { |
d795ddad SO |
48 | struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid); |
49 | ||
50 | zpci_err("error CCDF:\n"); | |
51 | zpci_err_hex(ccdf, sizeof(*ccdf)); | |
52 | ||
53 | if (!zdev) | |
54 | return; | |
55 | ||
56 | pr_err("%s: Event 0x%x reports an error for PCI function 0x%x\n", | |
57 | pci_name(zdev->pdev), ccdf->pec, ccdf->fid); | |
58 | } | |
59 | ||
aa3b7c29 SO |
60 | void zpci_event_error(void *data) |
61 | { | |
62 | if (zpci_is_enabled()) | |
63 | __zpci_event_error(data); | |
64 | } | |
65 | ||
66 | static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf) | |
d795ddad | 67 | { |
cbc0dd1f | 68 | struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid); |
1f1dcbd4 | 69 | struct pci_dev *pdev = zdev ? zdev->pdev : NULL; |
d795ddad | 70 | int ret; |
cbc0dd1f | 71 | |
1f1dcbd4 SO |
72 | pr_info("%s: Event 0x%x reconfigured PCI function 0x%x\n", |
73 | pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid); | |
74 | zpci_err("avail CCDF:\n"); | |
75 | zpci_err_hex(ccdf, sizeof(*ccdf)); | |
cbc0dd1f JG |
76 | |
77 | switch (ccdf->pec) { | |
d795ddad | 78 | case 0x0301: /* Standby -> Configured */ |
ca25f564 | 79 | if (!zdev || zdev->state != ZPCI_FN_STATE_STANDBY) |
d795ddad SO |
80 | break; |
81 | zdev->state = ZPCI_FN_STATE_CONFIGURED; | |
fcf2f402 | 82 | zdev->fh = ccdf->fh; |
d795ddad SO |
83 | ret = zpci_enable_device(zdev); |
84 | if (ret) | |
85 | break; | |
86 | pci_rescan_bus(zdev->bus); | |
cbc0dd1f | 87 | break; |
d795ddad | 88 | case 0x0302: /* Reserved -> Standby */ |
ca25f564 SO |
89 | if (!zdev) |
90 | clp_add_pci_device(ccdf->fid, ccdf->fh, 0); | |
cbc0dd1f | 91 | break; |
d795ddad SO |
92 | case 0x0303: /* Deconfiguration requested */ |
93 | if (pdev) | |
94 | pci_stop_and_remove_bus_device(pdev); | |
95 | ||
96 | ret = zpci_disable_device(zdev); | |
97 | if (ret) | |
98 | break; | |
99 | ||
100 | ret = sclp_pci_deconfigure(zdev->fid); | |
101 | zpci_dbg(3, "deconf fid:%x, rc:%d\n", zdev->fid, ret); | |
102 | if (!ret) | |
103 | zdev->state = ZPCI_FN_STATE_STANDBY; | |
104 | ||
105 | break; | |
106 | case 0x0304: /* Configured -> Standby */ | |
0c0c2776 SO |
107 | if (pdev) { |
108 | /* Give the driver a hint that the function is | |
109 | * already unusable. */ | |
110 | pdev->error_state = pci_channel_io_perm_failure; | |
d795ddad | 111 | pci_stop_and_remove_bus_device(pdev); |
0c0c2776 | 112 | } |
d795ddad | 113 | |
fcf2f402 | 114 | zdev->fh = ccdf->fh; |
d795ddad SO |
115 | zpci_disable_device(zdev); |
116 | zdev->state = ZPCI_FN_STATE_STANDBY; | |
117 | break; | |
118 | case 0x0306: /* 0x308 or 0x302 for multiple devices */ | |
1d578966 | 119 | clp_rescan_pci_devices(); |
cbc0dd1f | 120 | break; |
d795ddad | 121 | case 0x0308: /* Standby -> Reserved */ |
70426892 SO |
122 | if (!zdev) |
123 | break; | |
d795ddad SO |
124 | pci_stop_root_bus(zdev->bus); |
125 | pci_remove_root_bus(zdev->bus); | |
126 | break; | |
cbc0dd1f JG |
127 | default: |
128 | break; | |
129 | } | |
130 | } | |
aa3b7c29 SO |
131 | |
132 | void zpci_event_availability(void *data) | |
133 | { | |
134 | if (zpci_is_enabled()) | |
135 | __zpci_event_availability(data); | |
136 | } |