sys/arch/powerpc/pci/pci_machdep_common.c

   1 /* $NetBSD: pci_machdep_common.c,v 1.7 2008/01/17 23:42:59 garbled Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2007 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Tim Rightnour
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Generic PowerPC functions for dealing with a PCI bridge.  For most cases,
  34  * these functions will work just fine, however, some machines may need
  35  * specialized code, so those ports are free to write thier own functions
  36  * and call those instead where appropriate.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __KERNEL_RCSID(0, "$NetBSD: pci_machdep_common.c,v 1.7 2008/01/17 23:42:59 garbled Exp $");
  41
  42 #include <sys/types.h>
  43 #include <sys/param.h>
  44 #include <sys/time.h>
  45 #include <sys/systm.h>
  46 #include <sys/errno.h>
  47 #include <sys/extent.h>
  48 #include <sys/device.h>
  49 #include <sys/malloc.h>
  50
  51 #include <uvm/uvm_extern.h>
  52
  53 #define _POWERPC_BUS_DMA_PRIVATE
  54 #include <machine/bus.h>
  55 #include <machine/intr.h>
  56
  57 #include <dev/pci/pcivar.h>
  58 #include <dev/pci/pcireg.h>
  59 #include <dev/pci/pcidevs.h>
  60 #include <dev/pci/pciconf.h>
  61 #include <dev/pci/pciidereg.h>
  62
  63 /*
  64  * PCI doesn't have any special needs; just use the generic versions
  65  * of these functions.
  66  */
  67 struct powerpc_bus_dma_tag pci_bus_dma_tag = {
  68         0,                      /* _bounce_thresh */
  69         _bus_dmamap_create,
  70         _bus_dmamap_destroy,
  71         _bus_dmamap_load,
  72         _bus_dmamap_load_mbuf,
  73         _bus_dmamap_load_uio,
  74         _bus_dmamap_load_raw,
  75         _bus_dmamap_unload,
  76         NULL,                   /* _dmamap_sync */
  77         _bus_dmamem_alloc,
  78         _bus_dmamem_free,
  79         _bus_dmamem_map,
  80         _bus_dmamem_unmap,
  81         _bus_dmamem_mmap,
  82 };
  83
  84 int
  85 genppc_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
  86 {
  87         return 32;
  88 }
  89
  90 const char *
  91 genppc_pci_intr_string(void *v, pci_intr_handle_t ih)
  92 {
  93         static char irqstr[8];          /* 4 + 2 + NULL + sanity */
  94
  95         if (ih == 0 || ih >= ICU_LEN
  96 /* XXX on macppc it's completely legal to have PCI interrupts on a slave PIC */
  97 #ifdef IRQ_SLAVE
  98             || ih == IRQ_SLAVE
  99 #endif
 100             )
 101                 panic("pci_intr_string: bogus handle 0x%x", ih);
 102
 103         sprintf(irqstr, "irq %d", ih);
 104         return (irqstr);
 105
 106 }
 107
 108 const struct evcnt *
 109 genppc_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
 110 {
 111
 112         /* XXX for now, no evcnt parent reported */
 113         return NULL;
 114 }
 115
 116 void *
 117 genppc_pci_intr_establish(void *v, pci_intr_handle_t ih, int level,
 118     int (*func)(void *), void *arg)
 119 {
 120
 121         if (ih == 0 || ih >= ICU_LEN
 122 #ifdef IRQ_SLAVE
 123             || ih == IRQ_SLAVE
 124 #endif
 125             )
 126                 panic("pci_intr_establish: bogus handle 0x%x", ih);
 127
 128         return intr_establish(ih, IST_LEVEL, level, func, arg);
 129 }
 130
 131 void
 132 genppc_pci_intr_disestablish(void *v, void *cookie)
 133 {
 134
 135         intr_disestablish(cookie);
 136 }
 137
 138 void
 139 genppc_pci_conf_interrupt(pci_chipset_tag_t pct, int bus, int dev, int pin,
 140     int swiz, int *iline)
 141 {
 142         /* do nothing */
 143 }
 144
 145 int
 146 genppc_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func,
 147         pcireg_t id)
 148 {
 149         return (PCI_CONF_DEFAULT);
 150 }
 151
 152 int
 153 genppc_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
 154 {
 155         int pin = pa->pa_intrpin;
 156         int line = pa->pa_intrline;
 157
 158 #ifdef DEBUG
 159         printf("%s: pin: %d, line: %d\n", __func__, pin, line);
 160 #endif
 161
 162         if (pin == 0) {
 163                 /* No IRQ used. */
 164                 aprint_error("pci_intr_map: interrupt pin %d\n", pin);
 165                 goto bad;
 166         }
 167
 168         if (pin > 4) {
 169                 aprint_error("pci_intr_map: bad interrupt pin %d\n", pin);
 170                 goto bad;
 171         }
 172
 173         /*
 174          * Section 6.2.4, `Miscellaneous Functions', says that 255 means
 175          * `unknown' or `no connection' on a PC.  We assume that a device with
 176          * `no connection' either doesn't have an interrupt (in which case the
 177          * pin number should be 0, and would have been noticed above), or
 178          * wasn't configured by the BIOS (in which case we punt, since there's
 179          * no real way we can know how the interrupt lines are mapped in the
 180          * hardware).
 181          *
 182          * XXX
 183          * Since IRQ 0 is only used by the clock, and we can't actually be sure
 184          * that the BIOS did its job, we also recognize that as meaning that
 185          * the BIOS has not configured the device.
 186          */
 187         if (line == 0 || line == 255) {
 188                 aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin);
 189                 goto bad;
 190         } else {
 191                 if (line >= ICU_LEN) {
 192                         aprint_error("pci_intr_map: bad interrupt line %d\n", line);
 193                         goto bad;
 194                 }
 195         }
 196
 197         *ihp = line;
 198         return 0;
 199
 200 bad:
 201         *ihp = -1;
 202         return 1;
 203 }
 204
 205 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH
 206 #include <machine/isa_machdep.h>
 207 #include "isa.h"
 208
 209 void *genppc_pciide_machdep_compat_intr_establish(struct device *,
 210     struct pci_attach_args *, int, int (*)(void *), void *);
 211
 212 void *
 213 genppc_pciide_machdep_compat_intr_establish(struct device *dev,
 214     struct pci_attach_args *pa, int chan, int (*func)(void *), void *arg)
 215 {
 216 #if NISA > 0
 217         int irq;
 218         void *cookie;
 219
 220         irq = PCIIDE_COMPAT_IRQ(chan);
 221         cookie = isa_intr_establish(NULL, irq, IST_LEVEL, IPL_BIO, func, arg);
 222         if (cookie == NULL)
 223                 return (NULL);
 224         printf("%s: %s channel interrupting at irq %d\n", dev->dv_xname,
 225             PCIIDE_CHANNEL_NAME(chan), irq);
 226         return (cookie);
 227 #else
 228         panic("pciide_machdep_compat_intr_establish() called");
 229 #endif
 230 }
 231 #endif /* __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH */