Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/pci/apb.c
Version:
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1 /*- 2 * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier 3 * Copyright (c) 2000 Michael Smith <msmith@freebsd.org> 4 * Copyright (c) 2000 BSDi 5 * Copyright (c) 2001, 2003 Thomas Moestl <tmm@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * from: FreeBSD: src/sys/dev/pci/pci_pci.c,v 1.3 2000/12/13 32 * 33 * $FreeBSD: releng/6.0/sys/sparc64/pci/apb.c 145610 2005-04-28 03:33:46Z marcel $ 34 */ 35 36 /* 37 * Support for the Sun APB (Advanced PCI Bridge) PCI-PCI bridge. 38 * This bridge does not fully comply to the PCI bridge specification, and is 39 * therefore not supported by the generic driver. 40 * We can use some of the pcib methods anyway. 41 */ 42 43 #include "opt_ofw_pci.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/module.h> 49 #include <sys/bus.h> 50 51 #include <dev/ofw/ofw_bus.h> 52 #include <dev/ofw/openfirm.h> 53 54 #include <machine/bus.h> 55 #include <machine/ofw_bus.h> 56 #include <machine/resource.h> 57 58 #include <dev/pci/pcireg.h> 59 #include <dev/pci/pcivar.h> 60 #include <dev/pci/pcib_private.h> 61 62 #include "pcib_if.h" 63 64 #include <sparc64/pci/ofw_pci.h> 65 #include <sparc64/pci/ofw_pcib_subr.h> 66 67 /* 68 * Bridge-specific data. 69 */ 70 struct apb_softc { 71 struct ofw_pcib_gen_softc sc_bsc; 72 u_int8_t sc_iomap; 73 u_int8_t sc_memmap; 74 }; 75 76 static device_probe_t apb_probe; 77 static device_attach_t apb_attach; 78 static bus_alloc_resource_t apb_alloc_resource; 79 80 static device_method_t apb_methods[] = { 81 /* Device interface */ 82 DEVMETHOD(device_probe, apb_probe), 83 DEVMETHOD(device_attach, apb_attach), 84 DEVMETHOD(device_shutdown, bus_generic_shutdown), 85 DEVMETHOD(device_suspend, bus_generic_suspend), 86 DEVMETHOD(device_resume, bus_generic_resume), 87 88 /* Bus interface */ 89 DEVMETHOD(bus_print_child, bus_generic_print_child), 90 DEVMETHOD(bus_read_ivar, pcib_read_ivar), 91 DEVMETHOD(bus_write_ivar, pcib_write_ivar), 92 DEVMETHOD(bus_alloc_resource, apb_alloc_resource), 93 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 94 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 95 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 96 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 97 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 98 99 /* pcib interface */ 100 DEVMETHOD(pcib_maxslots, pcib_maxslots), 101 DEVMETHOD(pcib_read_config, pcib_read_config), 102 DEVMETHOD(pcib_write_config, pcib_write_config), 103 DEVMETHOD(pcib_route_interrupt, ofw_pcib_gen_route_interrupt), 104 105 /* ofw_bus interface */ 106 DEVMETHOD(ofw_bus_get_node, ofw_pcib_gen_get_node), 107 108 /* ofw_pci interface */ 109 DEVMETHOD(ofw_pci_adjust_busrange, ofw_pcib_gen_adjust_busrange), 110 111 { 0, 0 } 112 }; 113 114 static driver_t apb_driver = { 115 "pcib", 116 apb_methods, 117 sizeof(struct apb_softc), 118 }; 119 120 DRIVER_MODULE(apb, pci, apb_driver, pcib_devclass, 0, 0); 121 122 /* APB specific registers */ 123 #define APBR_IOMAP 0xde 124 #define APBR_MEMMAP 0xdf 125 126 /* Definitions for the mapping registers */ 127 #define APB_IO_SCALE 0x200000 128 #define APB_MEM_SCALE 0x20000000 129 130 /* 131 * Generic device interface 132 */ 133 static int 134 apb_probe(device_t dev) 135 { 136 137 if (pci_get_vendor(dev) == 0x108e && /* Sun */ 138 pci_get_device(dev) == 0x5000) { /* APB */ 139 device_set_desc(dev, "APB PCI-PCI bridge"); 140 return (0); 141 } 142 return (ENXIO); 143 } 144 145 static void 146 apb_map_print(u_int8_t map, u_long scale) 147 { 148 int i, first; 149 150 for (first = 1, i = 0; i < 8; i++) { 151 if ((map & (1 << i)) != 0) { 152 printf("%s0x%lx-0x%lx", first ? "" : ", ", 153 i * scale, (i + 1) * scale - 1); 154 first = 0; 155 } 156 } 157 } 158 159 static int 160 apb_checkrange(u_int8_t map, u_long scale, u_long start, u_long end) 161 { 162 int i, ei; 163 164 i = start / scale; 165 ei = end / scale; 166 if (i > 7 || ei > 7) 167 return (0); 168 for (; i <= ei; i++) 169 if ((map & (1 << i)) == 0) 170 return (0); 171 return (1); 172 } 173 174 static int 175 apb_attach(device_t dev) 176 { 177 struct apb_softc *sc; 178 179 sc = device_get_softc(dev); 180 181 /* 182 * Get current bridge configuration. 183 */ 184 sc->sc_iomap = pci_read_config(dev, APBR_IOMAP, 1); 185 sc->sc_memmap = pci_read_config(dev, APBR_MEMMAP, 1); 186 ofw_pcib_gen_setup(dev); 187 188 if (bootverbose) { 189 device_printf(dev, " secondary bus %d\n", 190 sc->sc_bsc.ops_pcib_sc.secbus); 191 device_printf(dev, " subordinate bus %d\n", 192 sc->sc_bsc.ops_pcib_sc.subbus); 193 device_printf(dev, " I/O decode "); 194 apb_map_print(sc->sc_iomap, APB_IO_SCALE); 195 printf("\n"); 196 device_printf(dev, " memory decode "); 197 apb_map_print(sc->sc_memmap, APB_MEM_SCALE); 198 printf("\n"); 199 } 200 201 device_add_child(dev, "pci", sc->sc_bsc.ops_pcib_sc.secbus); 202 return (bus_generic_attach(dev)); 203 } 204 205 /* 206 * We have to trap resource allocation requests and ensure that the bridge 207 * is set up to, or capable of handling them. 208 */ 209 static struct resource * 210 apb_alloc_resource(device_t dev, device_t child, int type, int *rid, 211 u_long start, u_long end, u_long count, u_int flags) 212 { 213 struct apb_softc *sc; 214 215 sc = device_get_softc(dev); 216 217 /* 218 * If this is a "default" allocation against this rid, we can't work 219 * out where it's coming from (we should actually never see these) so 220 * we just have to punt. 221 */ 222 if (start == 0 && end == ~0) { 223 device_printf(dev, "can't decode default resource id %d for " 224 "%s%d, bypassing\n", *rid, device_get_name(child), 225 device_get_unit(child)); 226 goto passup; 227 } 228 229 /* 230 * Fail the allocation for this range if it's not supported. 231 * XXX we should probably just fix up the bridge decode and 232 * soldier on. 233 */ 234 switch (type) { 235 case SYS_RES_IOPORT: 236 if (!apb_checkrange(sc->sc_iomap, APB_IO_SCALE, start, end)) { 237 device_printf(dev, "device %s%d requested unsupported " 238 "I/O range 0x%lx-0x%lx\n", device_get_name(child), 239 device_get_unit(child), start, end); 240 return (NULL); 241 } 242 if (bootverbose) 243 device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device " 244 "%s%d requested decoded I/O range 0x%lx-0x%lx\n", 245 device_get_name(child), device_get_unit(child), 246 start, end); 247 break; 248 249 case SYS_RES_MEMORY: 250 if (!apb_checkrange(sc->sc_memmap, APB_MEM_SCALE, start, end)) { 251 device_printf(dev, "device %s%d requested unsupported " 252 "memory range 0x%lx-0x%lx\n", 253 device_get_name(child), device_get_unit(child), 254 start, end); 255 return (NULL); 256 } 257 if (bootverbose) 258 device_printf(sc->sc_bsc.ops_pcib_sc.dev, "device " 259 "%s%d requested decoded memory range 0x%lx-0x%lx\n", 260 device_get_name(child), device_get_unit(child), 261 start, end); 262 break; 263 264 default: 265 break; 266 } 267 268 passup: 269 /* 270 * Bridge is OK decoding this resource, so pass it up. 271 */ 272 return (bus_generic_alloc_resource(dev, child, type, rid, start, end, 273 count, flags)); 274 }
Cache object: 82aa5411c2e01dfc7cdd41149efc0903
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