arch/ia64/sn/io/sn2/pcibr/pcibr_hints.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) 2001-2003 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <asm/sn/sgi.h>
  11 #include <asm/sn/iograph.h>
  12 #include <asm/sn/pci/pcibr.h>
  13 #include <asm/sn/pci/pcibr_private.h>
  14 #include <asm/sn/pci/pci_defs.h>
  15
  16 pcibr_hints_t           pcibr_hints_get(vertex_hdl_t, int);
  17 void                    pcibr_hints_fix_rrbs(vertex_hdl_t);
  18 void                    pcibr_hints_dualslot(vertex_hdl_t, pciio_slot_t, pciio_slot_t);
  19 void                    pcibr_hints_intr_bits(vertex_hdl_t, pcibr_intr_bits_f *);
  20 void                    pcibr_set_rrb_callback(vertex_hdl_t, rrb_alloc_funct_t);
  21 void                    pcibr_hints_handsoff(vertex_hdl_t);
  22 void                    pcibr_hints_subdevs(vertex_hdl_t, pciio_slot_t, uint64_t);
  23
  24 pcibr_hints_t
  25 pcibr_hints_get(vertex_hdl_t xconn_vhdl, int alloc)
  26 {
  27     arbitrary_info_t        ainfo = 0;
  28     graph_error_t           rv;
  29     pcibr_hints_t           hint;
  30
  31     rv = hwgraph_info_get_LBL(xconn_vhdl, INFO_LBL_PCIBR_HINTS, &ainfo);
  32
  33     if (alloc && (rv != GRAPH_SUCCESS)) {
  34
  35         hint = kmalloc(sizeof (*(hint)), GFP_KERNEL);
  36         if ( !hint ) {
  37                 printk(KERN_WARNING "pcibr_hints_get(): unable to allocate "
  38                         "memory\n");
  39                 goto abnormal_exit;
  40         }
  41         memset(hint, 0, sizeof (*(hint)));
  42
  43         hint->rrb_alloc_funct = NULL;
  44         hint->ph_intr_bits = NULL;
  45         rv = hwgraph_info_add_LBL(xconn_vhdl,
  46                                   INFO_LBL_PCIBR_HINTS,
  47                                   (arbitrary_info_t) hint);
  48         if (rv != GRAPH_SUCCESS)
  49             goto abnormal_exit;
  50
  51         rv = hwgraph_info_get_LBL(xconn_vhdl, INFO_LBL_PCIBR_HINTS, &ainfo);
  52
  53         if (rv != GRAPH_SUCCESS)
  54             goto abnormal_exit;
  55
  56         if (ainfo != (arbitrary_info_t) hint)
  57             goto abnormal_exit;
  58     }
  59     return (pcibr_hints_t) ainfo;
  60
  61 abnormal_exit:
  62     kfree(hint);
  63     return NULL;
  64
  65 }
  66
  67 void
  68 pcibr_hints_fix_some_rrbs(vertex_hdl_t xconn_vhdl, unsigned mask)
  69 {
  70     pcibr_hints_t           hint = pcibr_hints_get(xconn_vhdl, 1);
  71
  72     if (hint)
  73         hint->ph_rrb_fixed = mask;
  74     else
  75         PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HINTS, xconn_vhdl,
  76                     "pcibr_hints_fix_rrbs: pcibr_hints_get failed\n"));
  77 }
  78
  79 void
  80 pcibr_hints_fix_rrbs(vertex_hdl_t xconn_vhdl)
  81 {
  82     pcibr_hints_fix_some_rrbs(xconn_vhdl, 0xFF);
  83 }
  84
  85 void
  86 pcibr_hints_dualslot(vertex_hdl_t xconn_vhdl,
  87                      pciio_slot_t host,
  88                      pciio_slot_t guest)
  89 {
  90     pcibr_hints_t           hint = pcibr_hints_get(xconn_vhdl, 1);
  91
  92     if (hint)
  93         hint->ph_host_slot[guest] = host + 1;
  94     else
  95         PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HINTS, xconn_vhdl,
  96                     "pcibr_hints_dualslot: pcibr_hints_get failed\n"));
  97 }
  98
  99 void
 100 pcibr_hints_intr_bits(vertex_hdl_t xconn_vhdl,
 101                       pcibr_intr_bits_f *xxx_intr_bits)
 102 {
 103     pcibr_hints_t           hint = pcibr_hints_get(xconn_vhdl, 1);
 104
 105     if (hint)
 106         hint->ph_intr_bits = xxx_intr_bits;
 107     else
 108         PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HINTS, xconn_vhdl,
 109                     "pcibr_hints_intr_bits: pcibr_hints_get failed\n"));
 110 }
 111
 112 void
 113 pcibr_set_rrb_callback(vertex_hdl_t xconn_vhdl, rrb_alloc_funct_t rrb_alloc_funct)
 114 {
 115     pcibr_hints_t           hint = pcibr_hints_get(xconn_vhdl, 1);
 116
 117     if (hint)
 118         hint->rrb_alloc_funct = rrb_alloc_funct;
 119 }
 120
 121 void
 122 pcibr_hints_handsoff(vertex_hdl_t xconn_vhdl)
 123 {
 124     pcibr_hints_t           hint = pcibr_hints_get(xconn_vhdl, 1);
 125
 126     if (hint)
 127         hint->ph_hands_off = 1;
 128     else
 129         PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HINTS, xconn_vhdl,
 130                     "pcibr_hints_handsoff: pcibr_hints_get failed\n"));
 131 }
 132
 133 void
 134 pcibr_hints_subdevs(vertex_hdl_t xconn_vhdl,
 135                     pciio_slot_t slot,
 136                     uint64_t subdevs)
 137 {
 138     arbitrary_info_t        ainfo = 0;
 139     char                    sdname[16];
 140     vertex_hdl_t            pconn_vhdl = GRAPH_VERTEX_NONE;
 141
 142     sprintf(sdname, "%s/%d", EDGE_LBL_PCI, slot);
 143     (void) hwgraph_path_add(xconn_vhdl, sdname, &pconn_vhdl);
 144     if (pconn_vhdl == GRAPH_VERTEX_NONE) {
 145         PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HINTS, xconn_vhdl,
 146                     "pcibr_hints_subdevs: hwgraph_path_create failed\n"));
 147         return;
 148     }
 149     hwgraph_info_get_LBL(pconn_vhdl, INFO_LBL_SUBDEVS, &ainfo);
 150     if (ainfo == 0) {
 151         uint64_t                *subdevp;
 152
 153         subdevp = kmalloc(sizeof (*(subdevp)), GFP_KERNEL);
 154         if (!subdevp) {
 155             PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HINTS, xconn_vhdl,
 156                         "pcibr_hints_subdevs: subdev ptr alloc failed\n"));
 157             return;
 158         }
 159         memset(subdevp, 0, sizeof (*(subdevp)));
 160         *subdevp = subdevs;
 161         hwgraph_info_add_LBL(pconn_vhdl, INFO_LBL_SUBDEVS, (arbitrary_info_t) subdevp);
 162         hwgraph_info_get_LBL(pconn_vhdl, INFO_LBL_SUBDEVS, &ainfo);
 163         if (ainfo == (arbitrary_info_t) subdevp)
 164             return;
 165         kfree(subdevp);
 166         if (ainfo == (arbitrary_info_t) NULL) {
 167             PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HINTS, xconn_vhdl,
 168                         "pcibr_hints_subdevs: null subdevs ptr\n"));
 169             return;
 170         }
 171         PCIBR_DEBUG_ALWAYS((PCIBR_DEBUG_HINTS, xconn_vhdl,
 172                     "pcibr_subdevs_get: dup subdev add_LBL\n"));
 173     }
 174     *(uint64_t *) ainfo = subdevs;
 175 }