arch/s390/pci/pci_event.c

   1 /*
   2  *  Copyright IBM Corp. 2012
   3  *
   4  *  Author(s):
   5  *    Jan Glauber <jang@linux.vnet.ibm.com>
   6  */
   7
   8 #define COMPONENT "zPCI"
   9 #define pr_fmt(fmt) COMPONENT ": " fmt
  10
  11 #include <linux/kernel.h>
  12 #include <linux/pci.h>
  13
  14 /* Content Code Description for PCI Function Error */
  15 struct zpci_ccdf_err {
  16         u32 reserved1;
  17         u32 fh;                         /* function handle */
  18         u32 fid;                        /* function id */
  19         u32 ett         :  4;           /* expected table type */
  20         u32 mvn         : 12;           /* MSI vector number */
  21         u32 dmaas       :  8;           /* DMA address space */
  22         u32             :  6;
  23         u32 q           :  1;           /* event qualifier */
  24         u32 rw          :  1;           /* read/write */
  25         u64 faddr;                      /* failing address */
  26         u32 reserved3;
  27         u16 reserved4;
  28         u16 pec;                        /* PCI event code */
  29 } __packed;
  30
  31 /* Content Code Description for PCI Function Availability */
  32 struct zpci_ccdf_avail {
  33         u32 reserved1;
  34         u32 fh;                         /* function handle */
  35         u32 fid;                        /* function id */
  36         u32 reserved2;
  37         u32 reserved3;
  38         u32 reserved4;
  39         u32 reserved5;
  40         u16 reserved6;
  41         u16 pec;                        /* PCI event code */
  42 } __packed;
  43
  44 static void zpci_event_log_err(struct zpci_ccdf_err *ccdf)
  45 {
  46         struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
  47
  48         zpci_err("SEI error CCD:\n");
  49         zpci_err_hex(ccdf, sizeof(*ccdf));
  50         dev_err(&zdev->pdev->dev, "event code: 0x%x\n", ccdf->pec);
  51 }
  52
  53 static void zpci_event_log_avail(struct zpci_ccdf_avail *ccdf)
  54 {
  55         struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
  56
  57         pr_err("%s%s: availability event: fh: 0x%x  fid: 0x%x  event code: 0x%x  reason:",
  58                 (zdev) ? dev_driver_string(&zdev->pdev->dev) : "?",
  59                 (zdev) ? dev_name(&zdev->pdev->dev) : "?",
  60                 ccdf->fh, ccdf->fid, ccdf->pec);
  61         print_hex_dump(KERN_CONT, "ccdf", DUMP_PREFIX_OFFSET,
  62                        16, 1, ccdf, sizeof(*ccdf), false);
  63
  64         switch (ccdf->pec) {
  65         case 0x0301:
  66                 zpci_enable_device(zdev);
  67                 break;
  68         case 0x0302:
  69                 clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
  70                 break;
  71         case 0x0306:
  72                 clp_rescan_pci_devices();
  73                 break;
  74         default:
  75                 break;
  76         }
  77 }
  78
  79 void zpci_event_error(void *data)
  80 {
  81         struct zpci_ccdf_err *ccdf = data;
  82         struct zpci_dev *zdev;
  83
  84         zpci_event_log_err(ccdf);
  85         zdev = get_zdev_by_fid(ccdf->fid);
  86         if (!zdev) {
  87                 pr_err("Error event for unknown fid: %x", ccdf->fid);
  88                 return;
  89         }
  90 }
  91
  92 void zpci_event_availability(void *data)
  93 {
  94         zpci_event_log_avail(data);
  95 }