arch/ia64/sn/io/platform_init/sgi_io_init.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1992 - 1997, 2000-2003 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/config.h>
  11 #include <linux/slab.h>
  12 #include <linux/smp.h>
  13 #include <asm/sn/sgi.h>
  14 #include <asm/sn/io.h>
  15 #include <asm/sn/sn_cpuid.h>
  16 #include <asm/sn/klconfig.h>
  17 #include <asm/sn/sn_private.h>
  18 #include <asm/sn/pda.h>
  19
  20 extern void init_all_devices(void);
  21 extern void klhwg_add_all_modules(vertex_hdl_t);
  22 extern void klhwg_add_all_nodes(vertex_hdl_t);
  23
  24 extern int init_hcl(void);
  25 extern vertex_hdl_t hwgraph_root;
  26 extern void io_module_init(void);
  27 extern int pci_bus_to_hcl_cvlink(void);
  28
  29 nasid_t console_nasid = (nasid_t) - 1;
  30 char master_baseio_wid;
  31
  32 nasid_t master_baseio_nasid;
  33 nasid_t master_nasid = INVALID_NASID;   /* This is the partition master nasid */
  34
  35 /*
  36  * per_hub_init
  37  *
  38  *      This code is executed once for each Hub chip.
  39  */
  40 static void __init
  41 per_hub_init(cnodeid_t cnode)
  42 {
  43         nasid_t nasid;
  44         nodepda_t *npdap;
  45         ii_icmr_u_t ii_icmr;
  46         ii_ibcr_u_t ii_ibcr;
  47         ii_ilcsr_u_t ii_ilcsr;
  48
  49         nasid = cnodeid_to_nasid(cnode);
  50
  51         ASSERT(nasid != INVALID_NASID);
  52         ASSERT(nasid_to_cnodeid(nasid) == cnode);
  53
  54         npdap = NODEPDA(cnode);
  55
  56         /* Disable the request and reply errors. */
  57         REMOTE_HUB_S(nasid, IIO_IWEIM, 0xC000);
  58
  59         /*
  60          * Set the total number of CRBs that can be used.
  61          */
  62         ii_icmr.ii_icmr_regval = 0x0;
  63         ii_icmr.ii_icmr_fld_s.i_c_cnt = 0xf;
  64         if (enable_shub_wars_1_1()) {
  65                 // Set bit one of ICMR to prevent II from sending interrupt for II bug.
  66                 ii_icmr.ii_icmr_regval |= 0x1;
  67         }
  68         REMOTE_HUB_S(nasid, IIO_ICMR, ii_icmr.ii_icmr_regval);
  69
  70         /*
  71          * Set the number of CRBs that both of the BTEs combined
  72          * can use minus 1.
  73          */
  74         ii_ibcr.ii_ibcr_regval = 0x0;
  75         ii_ilcsr.ii_ilcsr_regval = REMOTE_HUB_L(nasid, IIO_LLP_CSR);
  76         if (ii_ilcsr.ii_ilcsr_fld_s.i_llp_stat & LNK_STAT_WORKING) {
  77                 ii_ibcr.ii_ibcr_fld_s.i_count = 0x8;
  78         } else {
  79                 /*
  80                  * if the LLP is down, there is no attached I/O, so
  81                  * give BTE all the CRBs.
  82                  */
  83                 ii_ibcr.ii_ibcr_fld_s.i_count = 0x14;
  84         }
  85         REMOTE_HUB_S(nasid, IIO_IBCR, ii_ibcr.ii_ibcr_regval);
  86
  87         /*
  88          * Set CRB timeout to be 10ms.
  89          */
  90         REMOTE_HUB_S(nasid, IIO_ICTP, 0xffffff);
  91         REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
  92
  93         /* Initialize error interrupts for this hub. */
  94         hub_error_init(cnode);
  95 }
  96
  97 /*
  98  * This routine is responsible for the setup of all the IRIX hwgraph style
  99  * stuff that's been pulled into linux.  It's called by sn_pci_find_bios which
 100  * is called just before the generic Linux PCI layer does its probing (by
 101  * platform_pci_fixup aka sn_pci_fixup).
 102  *
 103  * It is very IMPORTANT that this call is only made by the Master CPU!
 104  *
 105  */
 106
 107 void __init
 108 sgi_master_io_infr_init(void)
 109 {
 110         cnodeid_t cnode;
 111
 112         if (init_hcl() < 0) {   /* Sets up the hwgraph compatibility layer */
 113                 printk("sgi_master_io_infr_init: Cannot init hcl\n");
 114                 return;
 115         }
 116
 117         /*
 118          * Initialize platform-dependent vertices in the hwgraph:
 119          *      module
 120          *      node
 121          *      cpu
 122          *      memory
 123          *      slot
 124          *      hub
 125          *      router
 126          *      xbow
 127          */
 128
 129         io_module_init();       /* Use to be called module_init() .. */
 130         klhwg_add_all_modules(hwgraph_root);
 131         klhwg_add_all_nodes(hwgraph_root);
 132
 133         for (cnode = 0; cnode < numionodes; cnode++)
 134                 per_hub_init(cnode);
 135
 136         /*
 137          *
 138          * Our IO Infrastructure drivers are in place ..
 139          * Initialize the whole IO Infrastructure .. xwidget/device probes.
 140          *
 141          */
 142         init_all_devices();
 143         pci_bus_to_hcl_cvlink();
 144 }
 145
 146 inline int
 147 check_nasid_equiv(nasid_t nasida, nasid_t nasidb)
 148 {
 149         if ((nasida == nasidb)
 150             || (nasida == NODEPDA(nasid_to_cnodeid(nasidb))->xbow_peer))
 151                 return 1;
 152         else
 153                 return 0;
 154 }
 155
 156 int
 157 is_master_baseio_nasid_widget(nasid_t test_nasid, xwidgetnum_t test_wid)
 158 {
 159         /*
 160          * If the widget numbers are different, we're not the master.
 161          */
 162         if (test_wid != (xwidgetnum_t) master_baseio_wid) {
 163                 return 0;
 164         }
 165
 166         /*
 167          * If the NASIDs are the same or equivalent, we're the master.
 168          */
 169         if (check_nasid_equiv(test_nasid, master_baseio_nasid)) {
 170                 return 1;
 171         } else {
 172                 return 0;
 173         }
 174 }