1 /* $NetBSD: pci_machdep_common.c,v 1.15 2012/02/01 09:54:03 matt 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 1.15 2012/02/01 09:54:03 matt Exp $"); 41 42 #define _POWERPC_BUS_DMA_PRIVATE 43 44 #include <sys/param.h> 45 #include <sys/bus.h> 46 #include <sys/device.h> 47 #include <sys/errno.h> 48 #include <sys/extent.h> 49 #include <sys/intr.h> 50 #include <sys/systm.h> 51 #include <sys/time.h> 52 53 #include <uvm/uvm_extern.h> 54 55 #include <dev/pci/pcivar.h> 56 #include <dev/pci/pcireg.h> 57 #include <dev/pci/pcidevs.h> 58 #include <dev/pci/pciconf.h> 59 #include <dev/pci/pciidereg.h> 60 61 /* 62 * PCI doesn't have any special needs; just use the generic versions 63 * of these functions. 64 */ 65 struct powerpc_bus_dma_tag pci_bus_dma_tag = { 66 0, /* _bounce_thresh */ 67 _bus_dmamap_create, 68 _bus_dmamap_destroy, 69 _bus_dmamap_load, 70 _bus_dmamap_load_mbuf, 71 _bus_dmamap_load_uio, 72 _bus_dmamap_load_raw, 73 _bus_dmamap_unload, 74 NULL, /* _dmamap_sync */ 75 _bus_dmamem_alloc, 76 _bus_dmamem_free, 77 _bus_dmamem_map, 78 _bus_dmamem_unmap, 79 _bus_dmamem_mmap, 80 }; 81 82 int 83 genppc_pci_bus_maxdevs(void *v, int busno) 84 { 85 return 32; 86 } 87 88 const char * 89 genppc_pci_intr_string(void *v, pci_intr_handle_t ih) 90 { 91 static char irqstr[8]; /* 4 + 2 + NULL + sanity */ 92 93 #ifdef ICU_LEN 94 if (ih == 0 || ih >= ICU_LEN 95 /* XXX on macppc it's completely legal to have PCI interrupts on a slave PIC */ 96 #ifdef IRQ_SLAVE 97 || ih == IRQ_SLAVE 98 #endif 99 ) 100 panic("pci_intr_string: bogus handle 0x%x", ih); 101 #endif 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 #ifdef ICU_LEN 122 if (ih == 0 || ih >= ICU_LEN 123 #ifdef IRQ_SLAVE 124 || ih == IRQ_SLAVE 125 #endif 126 ) 127 panic("pci_intr_establish: bogus handle 0x%x", ih); 128 #endif 129 130 return intr_establish(ih, IST_LEVEL, level, func, arg); 131 } 132 133 void 134 genppc_pci_intr_disestablish(void *v, void *cookie) 135 { 136 137 intr_disestablish(cookie); 138 } 139 140 int 141 genppc_pci_intr_setattr(void *v, pci_intr_handle_t *ihp, int attr, 142 uint64_t data) 143 { 144 145 return ENODEV; 146 } 147 148 void 149 genppc_pci_conf_interrupt(void *v, int bus, int dev, int pin, 150 int swiz, int *iline) 151 { 152 /* do nothing */ 153 } 154 155 int 156 genppc_pci_conf_hook(void *v, int bus, int dev, int func, pcireg_t id) 157 { 158 return (PCI_CONF_DEFAULT); 159 } 160 161 int 162 genppc_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 163 { 164 int pin = pa->pa_intrpin; 165 int line = pa->pa_intrline; 166 167 #ifdef DEBUG 168 printf("%s: pin: %d, line: %d\n", __func__, pin, line); 169 #endif 170 171 if (pin == 0) { 172 /* No IRQ used. */ 173 aprint_error("pci_intr_map: interrupt pin %d\n", pin); 174 goto bad; 175 } 176 177 if (pin > 4) { 178 aprint_error("pci_intr_map: bad interrupt pin %d\n", pin); 179 goto bad; 180 } 181 182 /* 183 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 184 * `unknown' or `no connection' on a PC. We assume that a device with 185 * `no connection' either doesn't have an interrupt (in which case the 186 * pin number should be 0, and would have been noticed above), or 187 * wasn't configured by the BIOS (in which case we punt, since there's 188 * no real way we can know how the interrupt lines are mapped in the 189 * hardware). 190 * 191 * XXX 192 * Since IRQ 0 is only used by the clock, and we can't actually be sure 193 * that the BIOS did its job, we also recognize that as meaning that 194 * the BIOS has not configured the device. 195 */ 196 if (line == 0 || line == 255) { 197 aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin); 198 goto bad; 199 #ifdef ICU_LEN 200 } else { 201 if (line >= ICU_LEN) { 202 aprint_error("pci_intr_map: bad interrupt line %d\n", line); 203 goto bad; 204 } 205 #endif 206 } 207 208 *ihp = line; 209 return 0; 210 211 bad: 212 *ihp = -1; 213 return 1; 214 } 215 216 int 217 genppc_pci_msi_request(const struct pci_attach_args *pa, 218 pci_msi_handle_t *msihp, size_t nmsirq, int ipl, int capid) 219 { 220 return EOPNOTSUPP; 221 } 222 223 int 224 genppc_pci_msi_type(void *v, pci_msi_handle_t msih) 225 { 226 panic("%s", __func__); 227 } 228 229 size_t 230 genppc_pci_msi_available(void *v, pci_msi_handle_t msih) 231 { 232 panic("%s", __func__); 233 } 234 235 const char * 236 genppc_pci_msi_string(void *v, pci_msi_handle_t msih, size_t msirq) 237 { 238 panic("%s", __func__); 239 } 240 241 const struct evcnt * 242 genppc_pci_msi_evcnt(void *v, pci_msi_handle_t msih, size_t msirq) 243 { 244 panic("%s", __func__); 245 } 246 247 void * 248 genppc_pci_msi_establish(void *v, pci_msi_handle_t msih, size_t msirq, 249 int ipl, int (*func)(void *), void *arg) 250 { 251 panic("%s", __func__); 252 } 253 254 void * 255 genppc_pci_msix_establish(void *v, pci_msi_handle_t msih, size_t vec, 256 size_t msirq, int ipl, int (*func)(void *), void *arg) 257 { 258 panic("%s", __func__); 259 } 260 261 void 262 genppc_pci_msi_disestablish(void *v, void *ih) 263 { 264 panic("%s", __func__); 265 } 266 267 void 268 genppc_pci_msi_free(void *v, pci_msi_handle_t msih, size_t msirq) 269 { 270 panic("%s", __func__); 271 } 272 273 void 274 genppc_pci_msi_release(void *v, pci_msi_handle_t msih) 275 { 276 panic("%s", __func__); 277 } 278 279 void 280 genppc_pci_chipset_msi_init(pci_chipset_tag_t pc) 281 { 282 pc->pc_msi_request = genppc_pci_msi_request; 283 pc->pc_msi_type = genppc_pci_msi_type; 284 pc->pc_msi_available = genppc_pci_msi_available; 285 pc->pc_msi_evcnt = genppc_pci_msi_evcnt; 286 pc->pc_msi_string = genppc_pci_msi_string; 287 pc->pc_msi_establish = genppc_pci_msi_establish; 288 pc->pc_msix_establish = genppc_pci_msix_establish; 289 pc->pc_msi_disestablish = genppc_pci_msi_disestablish; 290 pc->pc_msi_free = genppc_pci_msi_free; 291 pc->pc_msi_release = genppc_pci_msi_release; 292 } 293 294 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH 295 #include <machine/isa_machdep.h> 296 #include "isa.h" 297 298 void *genppc_pciide_machdep_compat_intr_establish(device_t, 299 struct pci_attach_args *, int, int (*)(void *), void *); 300 301 void * 302 genppc_pciide_machdep_compat_intr_establish(device_t dev, 303 struct pci_attach_args *pa, int chan, int (*func)(void *), void *arg) 304 { 305 #if NISA > 0 306 int irq; 307 void *cookie; 308 309 irq = PCIIDE_COMPAT_IRQ(chan); 310 cookie = isa_intr_establish(NULL, irq, IST_LEVEL, IPL_BIO, func, arg); 311 if (cookie == NULL) 312 return (NULL); 313 aprint_normal_dev(dev, "%s channel interrupting at irq %d\n", 314 PCIIDE_CHANNEL_NAME(chan), irq); 315 return (cookie); 316 #else 317 panic("pciide_machdep_compat_intr_establish() called"); 318 #endif 319 } 320 #endif /* __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH */ 321