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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Generic PowerPC functions for dealing with a PCI bridge. For most cases, 41 * these functions will work just fine, however, some machines may need 42 * specialized code, so those ports are free to write thier own functions 43 * and call those instead where appropriate. 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: pci_machdep_common.c,v 1.7 2008/01/17 23:42:59 garbled Exp $"); 48 49 #include <sys/types.h> 50 #include <sys/param.h> 51 #include <sys/time.h> 52 #include <sys/systm.h> 53 #include <sys/errno.h> 54 #include <sys/extent.h> 55 #include <sys/device.h> 56 #include <sys/malloc.h> 57 58 #include <uvm/uvm_extern.h> 59 60 #define _POWERPC_BUS_DMA_PRIVATE 61 #include <machine/bus.h> 62 #include <machine/intr.h> 63 64 #include <dev/pci/pcivar.h> 65 #include <dev/pci/pcireg.h> 66 #include <dev/pci/pcidevs.h> 67 #include <dev/pci/pciconf.h> 68 #include <dev/pci/pciidereg.h> 69 70 /* 71 * PCI doesn't have any special needs; just use the generic versions 72 * of these functions. 73 */ 74 struct powerpc_bus_dma_tag pci_bus_dma_tag = { 75 0, /* _bounce_thresh */ 76 _bus_dmamap_create, 77 _bus_dmamap_destroy, 78 _bus_dmamap_load, 79 _bus_dmamap_load_mbuf, 80 _bus_dmamap_load_uio, 81 _bus_dmamap_load_raw, 82 _bus_dmamap_unload, 83 NULL, /* _dmamap_sync */ 84 _bus_dmamem_alloc, 85 _bus_dmamem_free, 86 _bus_dmamem_map, 87 _bus_dmamem_unmap, 88 _bus_dmamem_mmap, 89 }; 90 91 int 92 genppc_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) 93 { 94 return 32; 95 } 96 97 const char * 98 genppc_pci_intr_string(void *v, pci_intr_handle_t ih) 99 { 100 static char irqstr[8]; /* 4 + 2 + NULL + sanity */ 101 102 if (ih == 0 || ih >= ICU_LEN 103 /* XXX on macppc it's completely legal to have PCI interrupts on a slave PIC */ 104 #ifdef IRQ_SLAVE 105 || ih == IRQ_SLAVE 106 #endif 107 ) 108 panic("pci_intr_string: bogus handle 0x%x", ih); 109 110 sprintf(irqstr, "irq %d", ih); 111 return (irqstr); 112 113 } 114 115 const struct evcnt * 116 genppc_pci_intr_evcnt(void *v, pci_intr_handle_t ih) 117 { 118 119 /* XXX for now, no evcnt parent reported */ 120 return NULL; 121 } 122 123 void * 124 genppc_pci_intr_establish(void *v, pci_intr_handle_t ih, int level, 125 int (*func)(void *), void *arg) 126 { 127 128 if (ih == 0 || ih >= ICU_LEN 129 #ifdef IRQ_SLAVE 130 || ih == IRQ_SLAVE 131 #endif 132 ) 133 panic("pci_intr_establish: bogus handle 0x%x", ih); 134 135 return intr_establish(ih, IST_LEVEL, level, func, arg); 136 } 137 138 void 139 genppc_pci_intr_disestablish(void *v, void *cookie) 140 { 141 142 intr_disestablish(cookie); 143 } 144 145 void 146 genppc_pci_conf_interrupt(pci_chipset_tag_t pct, int bus, int dev, int pin, 147 int swiz, int *iline) 148 { 149 /* do nothing */ 150 } 151 152 int 153 genppc_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func, 154 pcireg_t id) 155 { 156 return (PCI_CONF_DEFAULT); 157 } 158 159 int 160 genppc_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) 161 { 162 int pin = pa->pa_intrpin; 163 int line = pa->pa_intrline; 164 165 #ifdef DEBUG 166 printf("%s: pin: %d, line: %d\n", __func__, pin, line); 167 #endif 168 169 if (pin == 0) { 170 /* No IRQ used. */ 171 aprint_error("pci_intr_map: interrupt pin %d\n", pin); 172 goto bad; 173 } 174 175 if (pin > 4) { 176 aprint_error("pci_intr_map: bad interrupt pin %d\n", pin); 177 goto bad; 178 } 179 180 /* 181 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 182 * `unknown' or `no connection' on a PC. We assume that a device with 183 * `no connection' either doesn't have an interrupt (in which case the 184 * pin number should be 0, and would have been noticed above), or 185 * wasn't configured by the BIOS (in which case we punt, since there's 186 * no real way we can know how the interrupt lines are mapped in the 187 * hardware). 188 * 189 * XXX 190 * Since IRQ 0 is only used by the clock, and we can't actually be sure 191 * that the BIOS did its job, we also recognize that as meaning that 192 * the BIOS has not configured the device. 193 */ 194 if (line == 0 || line == 255) { 195 aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin); 196 goto bad; 197 } else { 198 if (line >= ICU_LEN) { 199 aprint_error("pci_intr_map: bad interrupt line %d\n", line); 200 goto bad; 201 } 202 } 203 204 *ihp = line; 205 return 0; 206 207 bad: 208 *ihp = -1; 209 return 1; 210 } 211 212 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH 213 #include <machine/isa_machdep.h> 214 #include "isa.h" 215 216 void *genppc_pciide_machdep_compat_intr_establish(struct device *, 217 struct pci_attach_args *, int, int (*)(void *), void *); 218 219 void * 220 genppc_pciide_machdep_compat_intr_establish(struct device *dev, 221 struct pci_attach_args *pa, int chan, int (*func)(void *), void *arg) 222 { 223 #if NISA > 0 224 int irq; 225 void *cookie; 226 227 irq = PCIIDE_COMPAT_IRQ(chan); 228 cookie = isa_intr_establish(NULL, irq, IST_LEVEL, IPL_BIO, func, arg); 229 if (cookie == NULL) 230 return (NULL); 231 printf("%s: %s channel interrupting at irq %d\n", dev->dv_xname, 232 PCIIDE_CHANNEL_NAME(chan), irq); 233 return (cookie); 234 #else 235 panic("pciide_machdep_compat_intr_establish() called"); 236 #endif 237 } 238 #endif /* __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH */ 239