arch/sparc64/kernel/pci_common.c

   1 /* $Id: pci_common.c,v 1.29 2002/02/01 00:56:03 davem Exp $
   2  * pci_common.c: PCI controller common support.
   3  *
   4  * Copyright (C) 1999 David S. Miller (davem@redhat.com)
   5  */
   6
   7 #include <linux/string.h>
   8 #include <linux/slab.h>
   9 #include <linux/init.h>
  10 #include <linux/pci.h>
  11 #include <linux/device.h>
  12
  13 #include <asm/pbm.h>
  14 #include <asm/prom.h>
  15 #include <asm/of_device.h>
  16
  17 #include "pci_impl.h"
  18
  19 void pci_register_legacy_regions(struct resource *io_res,
  20                                  struct resource *mem_res)
  21 {
  22         struct resource *p;
  23
  24         /* VGA Video RAM. */
  25         p = kzalloc(sizeof(*p), GFP_KERNEL);
  26         if (!p)
  27                 return;
  28
  29         p->name = "Video RAM area";
  30         p->start = mem_res->start + 0xa0000UL;
  31         p->end = p->start + 0x1ffffUL;
  32         p->flags = IORESOURCE_BUSY;
  33         request_resource(mem_res, p);
  34
  35         p = kzalloc(sizeof(*p), GFP_KERNEL);
  36         if (!p)
  37                 return;
  38
  39         p->name = "System ROM";
  40         p->start = mem_res->start + 0xf0000UL;
  41         p->end = p->start + 0xffffUL;
  42         p->flags = IORESOURCE_BUSY;
  43         request_resource(mem_res, p);
  44
  45         p = kzalloc(sizeof(*p), GFP_KERNEL);
  46         if (!p)
  47                 return;
  48
  49         p->name = "Video ROM";
  50         p->start = mem_res->start + 0xc0000UL;
  51         p->end = p->start + 0x7fffUL;
  52         p->flags = IORESOURCE_BUSY;
  53         request_resource(mem_res, p);
  54 }
  55
  56 /* Generic helper routines for PCI error reporting. */
  57 void pci_scan_for_target_abort(struct pci_controller_info *p,
  58                                struct pci_pbm_info *pbm,
  59                                struct pci_bus *pbus)
  60 {
  61         struct pci_dev *pdev;
  62         struct pci_bus *bus;
  63
  64         list_for_each_entry(pdev, &pbus->devices, bus_list) {
  65                 u16 status, error_bits;
  66
  67                 pci_read_config_word(pdev, PCI_STATUS, &status);
  68                 error_bits =
  69                         (status & (PCI_STATUS_SIG_TARGET_ABORT |
  70                                    PCI_STATUS_REC_TARGET_ABORT));
  71                 if (error_bits) {
  72                         pci_write_config_word(pdev, PCI_STATUS, error_bits);
  73                         printk("PCI%d(PBM%c): Device [%s] saw Target Abort [%016x]\n",
  74                                p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
  75                                pci_name(pdev), status);
  76                 }
  77         }
  78
  79         list_for_each_entry(bus, &pbus->children, node)
  80                 pci_scan_for_target_abort(p, pbm, bus);
  81 }
  82
  83 void pci_scan_for_master_abort(struct pci_controller_info *p,
  84                                struct pci_pbm_info *pbm,
  85                                struct pci_bus *pbus)
  86 {
  87         struct pci_dev *pdev;
  88         struct pci_bus *bus;
  89
  90         list_for_each_entry(pdev, &pbus->devices, bus_list) {
  91                 u16 status, error_bits;
  92
  93                 pci_read_config_word(pdev, PCI_STATUS, &status);
  94                 error_bits =
  95                         (status & (PCI_STATUS_REC_MASTER_ABORT));
  96                 if (error_bits) {
  97                         pci_write_config_word(pdev, PCI_STATUS, error_bits);
  98                         printk("PCI%d(PBM%c): Device [%s] received Master Abort [%016x]\n",
  99                                p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
 100                                pci_name(pdev), status);
 101                 }
 102         }
 103
 104         list_for_each_entry(bus, &pbus->children, node)
 105                 pci_scan_for_master_abort(p, pbm, bus);
 106 }
 107
 108 void pci_scan_for_parity_error(struct pci_controller_info *p,
 109                                struct pci_pbm_info *pbm,
 110                                struct pci_bus *pbus)
 111 {
 112         struct pci_dev *pdev;
 113         struct pci_bus *bus;
 114
 115         list_for_each_entry(pdev, &pbus->devices, bus_list) {
 116                 u16 status, error_bits;
 117
 118                 pci_read_config_word(pdev, PCI_STATUS, &status);
 119                 error_bits =
 120                         (status & (PCI_STATUS_PARITY |
 121                                    PCI_STATUS_DETECTED_PARITY));
 122                 if (error_bits) {
 123                         pci_write_config_word(pdev, PCI_STATUS, error_bits);
 124                         printk("PCI%d(PBM%c): Device [%s] saw Parity Error [%016x]\n",
 125                                p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
 126                                pci_name(pdev), status);
 127                 }
 128         }
 129
 130         list_for_each_entry(bus, &pbus->children, node)
 131                 pci_scan_for_parity_error(p, pbm, bus);
 132 }