2 * Copyright IBM Corp. 2012
5 * Jan Glauber <jang@linux.vnet.ibm.com>
8 #define COMPONENT "zPCI"
9 #define pr_fmt(fmt) COMPONENT ": " fmt
11 #include <linux/kernel.h>
12 #include <linux/pci.h>
13 #include <asm/pci_debug.h>
16 /* Content Code Description for PCI Function Error */
17 struct zpci_ccdf_err {
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 */
25 u32 q : 1; /* event qualifier */
26 u32 rw : 1; /* read/write */
27 u64 faddr; /* failing address */
30 u16 pec; /* PCI event code */
33 /* Content Code Description for PCI Function Availability */
34 struct zpci_ccdf_avail {
36 u32 fh; /* function handle */
37 u32 fid; /* function id */
43 u16 pec; /* PCI event code */
46 void zpci_event_error(void *data)
48 struct zpci_ccdf_err *ccdf = data;
49 struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
51 zpci_err("error CCDF:\n");
52 zpci_err_hex(ccdf, sizeof(*ccdf));
57 pr_err("%s: Event 0x%x reports an error for PCI function 0x%x\n",
58 pci_name(zdev->pdev), ccdf->pec, ccdf->fid);
61 void zpci_event_availability(void *data)
63 struct zpci_ccdf_avail *ccdf = data;
64 struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
65 struct pci_dev *pdev = zdev ? zdev->pdev : NULL;
68 pr_info("%s: Event 0x%x reconfigured PCI function 0x%x\n",
69 pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
70 zpci_err("avail CCDF:\n");
71 zpci_err_hex(ccdf, sizeof(*ccdf));
74 case 0x0301: /* Standby -> Configured */
75 if (!zdev || zdev->state == ZPCI_FN_STATE_CONFIGURED)
77 zdev->state = ZPCI_FN_STATE_CONFIGURED;
79 ret = zpci_enable_device(zdev);
82 pci_rescan_bus(zdev->bus);
84 case 0x0302: /* Reserved -> Standby */
85 clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
87 case 0x0303: /* Deconfiguration requested */
89 pci_stop_and_remove_bus_device(pdev);
91 ret = zpci_disable_device(zdev);
95 ret = sclp_pci_deconfigure(zdev->fid);
96 zpci_dbg(3, "deconf fid:%x, rc:%d\n", zdev->fid, ret);
98 zdev->state = ZPCI_FN_STATE_STANDBY;
101 case 0x0304: /* Configured -> Standby */
103 pci_stop_and_remove_bus_device(pdev);
106 zpci_disable_device(zdev);
107 zdev->state = ZPCI_FN_STATE_STANDBY;
109 case 0x0306: /* 0x308 or 0x302 for multiple devices */
110 clp_rescan_pci_devices();
112 case 0x0308: /* Standby -> Reserved */
113 pci_stop_root_bus(zdev->bus);
114 pci_remove_root_bus(zdev->bus);