powerpc/pseries: Add support for ibm,req#msi-x
[linux-2.6] / arch / powerpc / platforms / pseries / firmware.c
1 /*
2  *  pSeries firmware setup code.
3  *
4  *  Portions from arch/powerpc/platforms/pseries/setup.c:
5  *   Copyright (C) 1995  Linus Torvalds
6  *   Adapted from 'alpha' version by Gary Thomas
7  *   Modified by Cort Dougan (cort@cs.nmt.edu)
8  *   Modified by PPC64 Team, IBM Corp
9  *
10  *  Portions from arch/powerpc/kernel/firmware.c
11  *   Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
12  *   Modifications for ppc64:
13  *    Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
14  *    Copyright (C) 2005 Stephen Rothwell, IBM Corporation
15  *
16  *  Copyright 2006 IBM Corporation.
17  *
18  * This program is free software; you can redistribute it and/or
19  * modify it under the terms of the GNU General Public License
20  * as published by the Free Software Foundation; either version
21  * 2 of the License, or (at your option) any later version.
22  */
23
24
25 #include <asm/firmware.h>
26 #include <asm/prom.h>
27 #include <asm/udbg.h>
28
29 #include "pseries.h"
30
31 typedef struct {
32     unsigned long val;
33     char * name;
34 } firmware_feature_t;
35
36 static __initdata firmware_feature_t
37 firmware_features_table[FIRMWARE_MAX_FEATURES] = {
38         {FW_FEATURE_PFT,                "hcall-pft"},
39         {FW_FEATURE_TCE,                "hcall-tce"},
40         {FW_FEATURE_SPRG0,              "hcall-sprg0"},
41         {FW_FEATURE_DABR,               "hcall-dabr"},
42         {FW_FEATURE_COPY,               "hcall-copy"},
43         {FW_FEATURE_ASR,                "hcall-asr"},
44         {FW_FEATURE_DEBUG,              "hcall-debug"},
45         {FW_FEATURE_PERF,               "hcall-perf"},
46         {FW_FEATURE_DUMP,               "hcall-dump"},
47         {FW_FEATURE_INTERRUPT,          "hcall-interrupt"},
48         {FW_FEATURE_MIGRATE,            "hcall-migrate"},
49         {FW_FEATURE_PERFMON,            "hcall-perfmon"},
50         {FW_FEATURE_CRQ,                "hcall-crq"},
51         {FW_FEATURE_VIO,                "hcall-vio"},
52         {FW_FEATURE_RDMA,               "hcall-rdma"},
53         {FW_FEATURE_LLAN,               "hcall-lLAN"},
54         {FW_FEATURE_BULK,               "hcall-bulk"},
55         {FW_FEATURE_XDABR,              "hcall-xdabr"},
56         {FW_FEATURE_MULTITCE,           "hcall-multi-tce"},
57         {FW_FEATURE_SPLPAR,             "hcall-splpar"},
58         {FW_FEATURE_BULK_REMOVE,        "hcall-bulk"},
59 };
60
61 /* Build up the firmware features bitmask using the contents of
62  * device-tree/ibm,hypertas-functions.  Ultimately this functionality may
63  * be moved into prom.c prom_init().
64  */
65 void __init fw_feature_init(const char *hypertas, unsigned long len)
66 {
67         const char *s;
68         int i;
69
70         pr_debug(" -> fw_feature_init()\n");
71
72         for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
73                 for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) {
74                         /* check value against table of strings */
75                         if (!firmware_features_table[i].name ||
76                             strcmp(firmware_features_table[i].name, s))
77                                 continue;
78
79                         /* we have a match */
80                         powerpc_firmware_features |=
81                                 firmware_features_table[i].val;
82                         break;
83                 }
84         }
85
86         pr_debug(" <- fw_feature_init()\n");
87 }