projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Copyright (C) 1999, 2000 Ralf Baechle (ralf@gnu.org) | |
| 3 | * Copyright (C) 1999, 2000 Silcon Graphics, Inc. | |
| 4 | * Copyright (C) 2004 Christoph Hellwig. | |
| 5 | * Released under GPL v2. | |
| 6 | * | |
| 7 | * Generic XTALK initialization code | |
| 8 | */ | |
| 9 | ||
| 10 | #include <linux/init.h> | |
| 11 | #include <linux/kernel.h> | |
| 631330f5 | 12 | #include <linux/smp.h> |
| 1da177e4 LT |
13 | #include <asm/sn/types.h> |
| 14 | #include <asm/sn/klconfig.h> | |
| 15 | #include <asm/sn/hub.h> | |
| 16 | #include <asm/pci/bridge.h> | |
| 17 | #include <asm/xtalk/xtalk.h> | |
| 18 | ||
| 19 | ||
| 70342287 RB |
20 | #define XBOW_WIDGET_PART_NUM 0x0 |
| 21 | #define XXBOW_WIDGET_PART_NUM 0xd000 /* Xbow in Xbridge */ | |
| 22 | #define BASE_XBOW_PORT 8 /* Lowest external port */ | |
| 1da177e4 LT |
23 | |
| 24 | extern int bridge_probe(nasid_t nasid, int widget, int masterwid); | |
| 25 | ||
| 078a55fc | 26 | static int probe_one_port(nasid_t nasid, int widget, int masterwid) |
| 1da177e4 | 27 | { |
| 70342287 | 28 | widgetreg_t widget_id; |
| 1da177e4 LT |
29 | xwidget_part_num_t partnum; |
| 30 | ||
| 31 | widget_id = *(volatile widgetreg_t *) | |
| 32 | (RAW_NODE_SWIN_BASE(nasid, widget) + WIDGET_ID); | |
| 33 | partnum = XWIDGET_PART_NUM(widget_id); | |
| 34 | ||
| 35 | printk(KERN_INFO "Cpu %d, Nasid 0x%x, widget 0x%x (partnum 0x%x) is ", | |
| 36 | smp_processor_id(), nasid, widget, partnum); | |
| 37 | ||
| 38 | switch (partnum) { | |
| 39 | case BRIDGE_WIDGET_PART_NUM: | |
| 40 | case XBRIDGE_WIDGET_PART_NUM: | |
| 41 | bridge_probe(nasid, widget, masterwid); | |
| 42 | break; | |
| 43 | default: | |
| 44 | break; | |
| 45 | } | |
| 46 | ||
| 47 | return 0; | |
| 48 | } | |
| 49 | ||
| 078a55fc | 50 | static int xbow_probe(nasid_t nasid) |
| 1da177e4 LT |
51 | { |
| 52 | lboard_t *brd; | |
| 53 | klxbow_t *xbow_p; | |
| 54 | unsigned masterwid, i; | |
| 55 | ||
| 56 | printk("is xbow\n"); | |
| 57 | ||
| 58 | /* | |
| 59 | * found xbow, so may have multiple bridges | |
| 60 | * need to probe xbow | |
| 61 | */ | |
| 62 | brd = find_lboard((lboard_t *)KL_CONFIG_INFO(nasid), KLTYPE_MIDPLANE8); | |
| 63 | if (!brd) | |
| 64 | return -ENODEV; | |
| 65 | ||
| 66 | xbow_p = (klxbow_t *)find_component(brd, NULL, KLSTRUCT_XBOW); | |
| 67 | if (!xbow_p) | |
| 68 | return -ENODEV; | |
| 69 | ||
| 70 | /* | |
| 71 | * Okay, here's a xbow. Lets arbitrate and find | |
| 72 | * out if we should initialize it. Set enabled | |
| 73 | * hub connected at highest or lowest widget as | |
| 74 | * master. | |
| 75 | */ | |
| 76 | #ifdef WIDGET_A | |
| 77 | i = HUB_WIDGET_ID_MAX + 1; | |
| 78 | do { | |
| 79 | i--; | |
| 80 | } while ((!XBOW_PORT_TYPE_HUB(xbow_p, i)) || | |
| 81 | (!XBOW_PORT_IS_ENABLED(xbow_p, i))); | |
| 82 | #else | |
| 83 | i = HUB_WIDGET_ID_MIN - 1; | |
| 84 | do { | |
| 85 | i++; | |
| 86 | } while ((!XBOW_PORT_TYPE_HUB(xbow_p, i)) || | |
| 87 | (!XBOW_PORT_IS_ENABLED(xbow_p, i))); | |
| 88 | #endif | |
| 89 | ||
| 90 | masterwid = i; | |
| 91 | if (nasid != XBOW_PORT_NASID(xbow_p, i)) | |
| 92 | return 1; | |
| 93 | ||
| 94 | for (i = HUB_WIDGET_ID_MIN; i <= HUB_WIDGET_ID_MAX; i++) { | |
| 95 | if (XBOW_PORT_IS_ENABLED(xbow_p, i) && | |
| 96 | XBOW_PORT_TYPE_IO(xbow_p, i)) | |
| 97 | probe_one_port(nasid, i, masterwid); | |
| 98 | } | |
| 99 | ||
| 100 | return 0; | |
| 101 | } | |
| 102 | ||
| 078a55fc | 103 | void xtalk_probe_node(cnodeid_t nid) |
| 1da177e4 | 104 | { |
| 70342287 RB |
105 | volatile u64 hubreg; |
| 106 | nasid_t nasid; | |
| 1da177e4 | 107 | xwidget_part_num_t partnum; |
| 70342287 | 108 | widgetreg_t widget_id; |
| 1da177e4 LT |
109 | |
| 110 | nasid = COMPACT_TO_NASID_NODEID(nid); | |
| 111 | hubreg = REMOTE_HUB_L(nasid, IIO_LLP_CSR); | |
| 112 | ||
| 113 | /* check whether the link is up */ | |
| 114 | if (!(hubreg & IIO_LLP_CSR_IS_UP)) | |
| 115 | return; | |
| 116 | ||
| 117 | widget_id = *(volatile widgetreg_t *) | |
| 70342287 | 118 | (RAW_NODE_SWIN_BASE(nasid, 0x0) + WIDGET_ID); |
| 1da177e4 LT |
119 | partnum = XWIDGET_PART_NUM(widget_id); |
| 120 | ||
| 121 | printk(KERN_INFO "Cpu %d, Nasid 0x%x: partnum 0x%x is ", | |
| 122 | smp_processor_id(), nasid, partnum); | |
| 123 | ||
| 124 | switch (partnum) { | |
| 125 | case BRIDGE_WIDGET_PART_NUM: | |
| 126 | bridge_probe(nasid, 0x8, 0xa); | |
| 127 | break; | |
| 128 | case XBOW_WIDGET_PART_NUM: | |
| 129 | case XXBOW_WIDGET_PART_NUM: | |
| 130 | xbow_probe(nasid); | |
| 131 | break; | |
| 132 | default: | |
| 133 | printk(" unknown widget??\n"); | |
| 134 | break; | |
| 135 | } | |
| 136 | } |