sys/bus/pci/pci_compat.c

   1 /*
   2  * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice unmodified, this list of conditions, and the following
  10  *    disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/pci/pci_compat.c,v 1.35.2.1 2001/10/14 21:14:14 luigi Exp $
  27  * $DragonFly: src/sys/bus/pci/pci_compat.c,v 1.14 2007/05/13 18:33:56 swildner Exp $
  28  *
  29  */
  30
  31 #include "opt_bus.h"
  32
  33 /* for compatibility to FreeBSD-2.2 and 3.x versions of PCI code */
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/malloc.h>
  38 #include <sys/module.h>
  39
  40 #include <vm/vm.h>
  41 #include <vm/pmap.h>
  42
  43 #include <sys/bus.h>
  44 #include <sys/rman.h>
  45 #include <machine/smp.h>
  46 #include <sys/interrupt.h>
  47
  48 #include <sys/pciio.h>
  49 #include "pcireg.h"
  50 #include "pcivar.h"
  51
  52 struct pci_compat_driver {
  53         driver_t driver;
  54         struct pci_device *dvp;
  55 };
  56
  57 /* ------------------------------------------------------------------------- */
  58
  59 u_long
  60 pci_conf_read(pcici_t cfg, u_long reg)
  61 {
  62         return (pci_read_config(cfg->dev, reg, 4));
  63 }
  64
  65 void
  66 pci_conf_write(pcici_t cfg, u_long reg, u_long data)
  67 {
  68         pci_write_config(cfg->dev, reg, data, 4);
  69 }
  70
  71 int
  72 pci_map_port(pcici_t cfg, u_long reg, pci_port_t* pa)
  73 {
  74         int rid;
  75         struct resource *res;
  76
  77         rid = reg;
  78         res = bus_alloc_resource(cfg->dev, SYS_RES_IOPORT, &rid,
  79                                  0, ~0, 1, RF_ACTIVE);
  80         if (res) {
  81                 *pa = rman_get_start(res);
  82                 return (1);
  83         }
  84         return (0);
  85 }
  86
  87 int
  88 pci_map_mem(pcici_t cfg, u_long reg, vm_offset_t* va, vm_offset_t* pa)
  89 {
  90         int rid;
  91         struct resource *res;
  92
  93         rid = reg;
  94         res = bus_alloc_resource(cfg->dev, SYS_RES_MEMORY, &rid,
  95                                  0, ~0, 1, RF_ACTIVE);
  96         if (res) {
  97                 *pa = rman_get_start(res);
  98                 *va = (vm_offset_t) rman_get_virtual(res);
  99                 return (1);
 100         }
 101         return (0);
 102 }
 103
 104 int
 105 pci_map_int(pcici_t cfg, pci_inthand_t *handler, void *arg)
 106 {
 107         return (pci_map_int_right(cfg, handler, arg, 0));
 108 }
 109
 110 int
 111 pci_map_int_right(pcici_t cfg, pci_inthand_t *handler, void *arg, u_int intflags)
 112 {
 113         int error;
 114 #ifdef APIC_IO
 115         int nextpin, muxcnt;
 116 #endif
 117         if (cfg->intpin != 0) {
 118                 int irq = cfg->intline;
 119                 int rid = 0;
 120                 struct resource *res;
 121                 int flags = 0;
 122                 int resflags = RF_SHAREABLE|RF_ACTIVE;
 123                 void *ih;
 124
 125                 if (intflags & INTR_FAST)
 126                         flags |= INTR_FAST;
 127                 if (intflags & INTR_EXCL)
 128                         resflags &= ~RF_SHAREABLE;
 129
 130                 res = bus_alloc_resource(cfg->dev, SYS_RES_IRQ, &rid,
 131                                          irq, irq, 1, resflags);
 132                 if (!res) {
 133                         kprintf("pci_map_int: can't allocate interrupt\n");
 134                         return 0;
 135                 }
 136
 137                 /*
 138                  * This is ugly. Translate the mask into an interrupt type.
 139                  */
 140
 141                 error = BUS_SETUP_INTR(device_get_parent(cfg->dev), cfg->dev,
 142                                        res, flags, handler, arg, &ih, NULL);
 143                 if (error != 0)
 144                         return 0;
 145
 146 #ifdef NEW_BUS_PCI
 147                 /*
 148                  * XXX this apic stuff looks totally busted.  It should
 149                  * move to the nexus code which actually registers the
 150                  * interrupt.
 151                  */
 152 #endif
 153
 154 #ifdef APIC_IO
 155                 nextpin = next_apic_irq(irq);
 156
 157                 if (nextpin < 0)
 158                         return 1;
 159
 160                 /*
 161                  * Attempt handling of some broken mp tables.
 162                  *
 163                  * It's OK to yell (since the mp tables are broken).
 164                  *
 165                  * Hanging in the boot is not OK
 166                  */
 167
 168                 muxcnt = 2;
 169                 nextpin = next_apic_irq(nextpin);
 170                 while (muxcnt < 5 && nextpin >= 0) {
 171                         muxcnt++;
 172                         nextpin = next_apic_irq(nextpin);
 173                 }
 174                 if (muxcnt >= 5) {
 175                         kprintf("bogus MP table, more than 4 IO APIC pins connected to the same PCI device or ISA/EISA interrupt\n");
 176                         return 0;
 177                 }
 178
 179                 kprintf("bogus MP table, %d IO APIC pins connected to the same PCI device or ISA/EISA interrupt\n", muxcnt);
 180
 181                 nextpin = next_apic_irq(irq);
 182                 while (nextpin >= 0) {
 183                         rid = 0;
 184                         res = bus_alloc_resource(cfg->dev, SYS_RES_IRQ, &rid,
 185                                                  nextpin, nextpin, 1,
 186                                                  resflags);
 187                         if (!res) {
 188                                 kprintf("pci_map_int: can't allocate extra interrupt\n");
 189                                 return 0;
 190                         }
 191                         error = BUS_SETUP_INTR(device_get_parent(cfg->dev),
 192                                                cfg->dev, res, flags,
 193                                                handler, arg, &ih, NULL);
 194                         if (error != 0) {
 195                                 kprintf("pci_map_int: BUS_SETUP_INTR failed\n");
 196                                 return 0;
 197                         }
 198                         kprintf("Registered extra interrupt handler for int %d (in addition to int %d)\n", nextpin, irq);
 199                         nextpin = next_apic_irq(nextpin);
 200                 }
 201 #endif
 202         }
 203         return (1);
 204 }
 205
 206 int
 207 pci_unmap_int(pcici_t cfg)
 208 {
 209         return (0); /* not supported, yet, since cfg doesn't know about idesc */
 210 }
 211
 212 pcici_t
 213 pci_get_parent_from_tag(pcici_t tag)
 214 {
 215         return (pcici_t)pci_devlist_get_parent(tag);
 216 }
 217
 218 int
 219 pci_get_bus_from_tag(pcici_t tag)
 220 {
 221         return tag->bus;
 222 }
 223
 224 /*
 225  * A simple driver to wrap the old pci driver mechanism for back-compat.
 226  */
 227
 228 static int
 229 pci_compat_probe(device_t dev)
 230 {
 231         struct pci_device *dvp;
 232         struct pci_devinfo *dinfo;
 233         pcicfgregs *cfg;
 234         const char *name;
 235         int error;
 236
 237         dinfo = device_get_ivars(dev);
 238         cfg = &dinfo->cfg;
 239         dvp = ((struct pci_compat_driver *)device_get_driver(dev))->dvp;
 240
 241         /*
 242          * Do the wrapped probe.
 243          */
 244         error = ENXIO;
 245         if (dvp && dvp->pd_probe) {
 246                 name = dvp->pd_probe(cfg, (cfg->device << 16) + cfg->vendor);
 247                 if (name) {
 248                         device_set_desc_copy(dev, name);
 249                         /* Allow newbus drivers to match "better" */
 250                         error = -200;
 251                 }
 252         }
 253
 254         return error;
 255 }
 256
 257 static int
 258 pci_compat_attach(device_t dev)
 259 {
 260         struct pci_device *dvp;
 261         struct pci_devinfo *dinfo;
 262         pcicfgregs *cfg;
 263         int unit;
 264
 265         dinfo = device_get_ivars(dev);
 266         cfg = &dinfo->cfg;
 267         dvp = ((struct pci_compat_driver *)device_get_driver(dev))->dvp;
 268
 269         unit = device_get_unit(dev);
 270         if (unit > *dvp->pd_count)
 271                 *dvp->pd_count = unit;
 272         if (dvp->pd_attach)
 273                 dvp->pd_attach(cfg, unit);
 274         device_printf(dev, "driver is using old-style compatibility shims\n");
 275         return 0;
 276 }
 277
 278 static device_method_t pci_compat_methods[] = {
 279         /* Device interface */
 280         DEVMETHOD(device_probe,         pci_compat_probe),
 281         DEVMETHOD(device_attach,        pci_compat_attach),
 282
 283         { 0, 0 }
 284 };
 285
 286 /*
 287  * Create a new style driver around each old pci driver.
 288  */
 289 int
 290 compat_pci_handler(module_t mod, int type, void *data)
 291 {
 292         struct pci_device *dvp = (struct pci_device *)data;
 293         struct pci_compat_driver *driver;
 294         devclass_t pci_devclass = devclass_find("pci");
 295
 296         switch (type) {
 297         case MOD_LOAD:
 298                 driver = kmalloc(sizeof(struct pci_compat_driver), M_DEVBUF, M_WAITOK | M_ZERO);
 299                 driver->driver.name = dvp->pd_name;
 300                 driver->driver.methods = pci_compat_methods;
 301                 driver->driver.size = sizeof(struct pci_devinfo *);
 302                 driver->dvp = dvp;
 303                 devclass_add_driver(pci_devclass, (driver_t *)driver);
 304                 break;
 305         case MOD_UNLOAD:
 306                 kprintf("%s: module unload not supported!\n", dvp->pd_name);
 307                 return EOPNOTSUPP;
 308         default:
 309                 break;
 310         }
 311         return 0;
 312 }