cam_xpt.c (9ec5d7cd350b0b1a43ee73a620a55e32f897ec52) cam_xpt.c (75f51904b5b62332719ffaaedafb36cef6940905)
1/*
2 * Implementation of the Common Access Method Transport (XPT) layer.
3 *
4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without

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34#include <sys/malloc.h>
35#include <sys/kernel.h>
36#include <sys/time.h>
37#include <sys/conf.h>
38#include <sys/fcntl.h>
39#include <sys/md5.h>
40#include <sys/devicestat.h>
41#include <sys/interrupt.h>
1/*
2 * Implementation of the Common Access Method Transport (XPT) layer.
3 *
4 * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
5 * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without

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34#include <sys/malloc.h>
35#include <sys/kernel.h>
36#include <sys/time.h>
37#include <sys/conf.h>
38#include <sys/fcntl.h>
39#include <sys/md5.h>
40#include <sys/devicestat.h>
41#include <sys/interrupt.h>
42#include <sys/bus.h>
42
43#ifdef PC98
44#include <pc98/pc98/pc98_machdep.h> /* geometry translation */
45#endif
46
47#include <machine/clock.h>
48#include <machine/ipl.h>
49
50#include <cam/cam.h>
43
44#ifdef PC98
45#include <pc98/pc98/pc98_machdep.h> /* geometry translation */
46#endif
47
48#include <machine/clock.h>
49#include <machine/ipl.h>
50
51#include <cam/cam.h>
51#include <cam/cam_conf.h>
52#include <cam/cam_ccb.h>
53#include <cam/cam_periph.h>
54#include <cam/cam_sim.h>
55#include <cam/cam_xpt.h>
56#include <cam/cam_xpt_sim.h>
57#include <cam/cam_xpt_periph.h>
58#include <cam/cam_debug.h>
59

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4083 return (CAM_REQ_CMP);
4084}
4085
4086static path_id_t
4087xptnextfreepathid(void)
4088{
4089 struct cam_eb *bus;
4090 path_id_t pathid;
52#include <cam/cam_ccb.h>
53#include <cam/cam_periph.h>
54#include <cam/cam_sim.h>
55#include <cam/cam_xpt.h>
56#include <cam/cam_xpt_sim.h>
57#include <cam/cam_xpt_periph.h>
58#include <cam/cam_debug.h>
59

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4083 return (CAM_REQ_CMP);
4084}
4085
4086static path_id_t
4087xptnextfreepathid(void)
4088{
4089 struct cam_eb *bus;
4090 path_id_t pathid;
4091 struct cam_sim_config *sim_conf;
4091 char *strval;
4092
4093 pathid = 0;
4094 bus = TAILQ_FIRST(&xpt_busses);
4095retry:
4096 /* Find an unoccupied pathid */
4097 while (bus != NULL
4098 && bus->path_id <= pathid) {
4099 if (bus->path_id == pathid)
4100 pathid++;
4101 bus = TAILQ_NEXT(bus, links);
4102 }
4103
4104 /*
4105 * Ensure that this pathid is not reserved for
4106 * a bus that may be registered in the future.
4107 */
4092
4093 pathid = 0;
4094 bus = TAILQ_FIRST(&xpt_busses);
4095retry:
4096 /* Find an unoccupied pathid */
4097 while (bus != NULL
4098 && bus->path_id <= pathid) {
4099 if (bus->path_id == pathid)
4100 pathid++;
4101 bus = TAILQ_NEXT(bus, links);
4102 }
4103
4104 /*
4105 * Ensure that this pathid is not reserved for
4106 * a bus that may be registered in the future.
4107 */
4108 sim_conf = cam_sinit;
4109 while (sim_conf->sim_name != NULL) {
4110
4111 if (IS_SPECIFIED(sim_conf->pathid)
4112 && (pathid == sim_conf->pathid)) {
4113 ++pathid;
4114 /* Start the search over */
4115 goto retry;
4116 } else {
4117 sim_conf++;
4118 }
4108 if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4109 ++pathid;
4110 /* Start the search over */
4111 goto retry;
4119 }
4120 return (pathid);
4121}
4122
4123static path_id_t
4124xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4125{
4112 }
4113 return (pathid);
4114}
4115
4116static path_id_t
4117xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4118{
4126 struct cam_sim_config *sim_conf;
4127 path_id_t pathid;
4119 path_id_t pathid;
4120 int i, dunit, val;
4121 char buf[32], *strval;
4128
4129 pathid = CAM_XPT_PATH_ID;
4122
4123 pathid = CAM_XPT_PATH_ID;
4130 for (sim_conf = cam_sinit; sim_conf->sim_name != NULL; sim_conf++) {
4131
4132 if (!IS_SPECIFIED(sim_conf->pathid))
4124 snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4125 i = -1;
4126 while ((i = resource_locate(i, "scbus")) != -1) {
4127 dunit = resource_query_unit(i);
4128 if (dunit < 0) /* unwired?! */
4133 continue;
4129 continue;
4134
4135 if (!strcmp(sim_name, sim_conf->sim_name)
4136 && (sim_unit == sim_conf->sim_unit)) {
4137
4138 if (IS_SPECIFIED(sim_conf->sim_bus)) {
4139 if (sim_bus == sim_conf->sim_bus) {
4140 pathid = sim_conf->pathid;
4141 break;
4142 }
4143 } else if (sim_bus == 0) {
4144 /* Unspecified matches bus 0 */
4145 pathid = sim_conf->pathid;
4130 if (resource_string_value("scbus", dunit, "at", &strval) != 0)
4131 continue;
4132 if (strcmp(buf, strval) != 0)
4133 continue;
4134 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4135 if (sim_bus == val) {
4136 pathid = dunit;
4146 break;
4137 break;
4147 } else {
4148 printf("Ambiguous scbus configuration for %s%d "
4149 "bus %d, cannot wire down. The kernel "
4150 "config entry for scbus%d should "
4151 "specify a controller bus.\n"
4152 "Scbus will be assigned dynamically.\n",
4153 sim_name, sim_unit, sim_bus,
4154 sim_conf->pathid);
4155 break;
4156 }
4138 }
4139 } else if (sim_bus == 0) {
4140 /* Unspecified matches bus 0 */
4141 pathid = dunit;
4142 break;
4143 } else {
4144 printf("Ambiguous scbus configuration for %s%d "
4145 "bus %d, cannot wire down. The kernel "
4146 "config entry for scbus%d should "
4147 "specify a controller bus.\n"
4148 "Scbus will be assigned dynamically.\n",
4149 sim_name, sim_unit, sim_bus, dunit);
4150 break;
4157 }
4158 }
4159
4160 if (pathid == CAM_XPT_PATH_ID)
4161 pathid = xptnextfreepathid();
4162 return (pathid);
4163}
4164

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4152 }
4153
4154 if (pathid == CAM_XPT_PATH_ID)
4155 pathid = xptnextfreepathid();
4156 return (pathid);
4157}
4158

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