1 /* $NetBSD: pci_machdep_common.c,v 1.8 2008/04/28 20:23:32 martin 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 1.8 2008/04/28 20:23:32 martin 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 */ 232