1 /* $NetBSD: pci_machdep_common.c,v 1.18 2013/04/28 00:45:45 macallan 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 1.18 2013/04/28 00:45:45 macallan 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 ._dmamap_create = _bus_dmamap_create, 67 ._dmamap_destroy = _bus_dmamap_destroy, 68 ._dmamap_load = _bus_dmamap_load, 69 ._dmamap_load_mbuf = _bus_dmamap_load_mbuf, 70 ._dmamap_load_uio = _bus_dmamap_load_uio, 71 ._dmamap_load_raw = _bus_dmamap_load_raw, 72 ._dmamap_unload = _bus_dmamap_unload, 73 74 ._dmamem_alloc = _bus_dmamem_alloc, 75 ._dmamem_free = _bus_dmamem_free, 76 ._dmamem_map = _bus_dmamem_map, 77 ._dmamem_unmap = _bus_dmamem_unmap, 78 ._dmamem_mmap = _bus_dmamem_mmap, 79 }; 80 81 int 82 genppc_pci_bus_maxdevs(void *v, int busno) 83 { 84 return 32; 85 } 86 87 const char * 88 genppc_pci_intr_string(void *v, pci_intr_handle_t ih) 89 { 90 static char irqstr[8]; /* 4 + 2 + NULL + sanity */ 91 92 #ifdef ICU_LEN 93 if (ih == 0 || ih >= ICU_LEN 94 /* XXX on macppc it's completely legal to have PCI interrupts on a slave PIC */ 95 #ifdef IRQ_SLAVE 96 || ih == IRQ_SLAVE 97 #endif 98 ) 99 panic("pci_intr_string: bogus handle 0x%x", ih); 100 #endif 101 102 sprintf(irqstr, "irq %d", ih); 103 return (irqstr); 104 105 } 106 107 const struct evcnt * 108 genppc_pci_intr_evcnt(void *v, pci_intr_handle_t ih) 109 { 110 111 /* XXX for now, no evcnt parent reported */ 112 return NULL; 113 } 114 115 void * 116 genppc_pci_intr_establish(void *v, pci_intr_handle_t ih, int level, 117 int (*func)(void *), void *arg) 118 { 119 120 #ifdef ICU_LEN 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 #endif 128 129 return intr_establish(ih, IST_LEVEL, level, func, arg); 130 } 131 132 void 133 genppc_pci_intr_disestablish(void *v, void *cookie) 134 { 135 136 intr_disestablish(cookie); 137 } 138 139 int 140 genppc_pci_intr_setattr(void *v, pci_intr_handle_t *ihp, int attr, 141 uint64_t data) 142 { 143 144 return ENODEV; 145 } 146 147 void 148 genppc_pci_conf_interrupt(void *v, int bus, int dev, int pin, 149 int swiz, int *iline) 150 { 151 /* do nothing */ 152 } 153 154 int 155 genppc_pci_conf_hook(void *v, int bus, int dev, int func, pcireg_t id) 156 { 157 return (PCI_CONF_DEFAULT); 158 } 159 160 int 161 genppc_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 162 { 163 int pin = pa->pa_intrpin; 164 int line = pa->pa_intrline; 165 166 #ifdef DEBUG 167 printf("%s: pin: %d, line: %d\n", __func__, pin, line); 168 #endif 169 170 if (pin == 0) { 171 /* No IRQ used. */ 172 aprint_error("pci_intr_map: interrupt pin %d\n", pin); 173 goto bad; 174 } 175 176 if (pin > 4) { 177 aprint_error("pci_intr_map: bad interrupt pin %d\n", pin); 178 goto bad; 179 } 180 181 /* 182 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 183 * `unknown' or `no connection' on a PC. We assume that a device with 184 * `no connection' either doesn't have an interrupt (in which case the 185 * pin number should be 0, and would have been noticed above), or 186 * wasn't configured by the BIOS (in which case we punt, since there's 187 * no real way we can know how the interrupt lines are mapped in the 188 * hardware). 189 * 190 * XXX 191 * Since IRQ 0 is only used by the clock, and we can't actually be sure 192 * that the BIOS did its job, we also recognize that as meaning that 193 * the BIOS has not configured the device. 194 */ 195 if (line == 0 || line == 255) { 196 aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin); 197 goto bad; 198 #ifdef ICU_LEN 199 } else { 200 if (line >= ICU_LEN) { 201 aprint_error("pci_intr_map: bad interrupt line %d\n", line); 202 goto bad; 203 } 204 #endif 205 } 206 207 *ihp = line; 208 return 0; 209 210 bad: 211 *ihp = -1; 212 return 1; 213 } 214 215 int 216 genppc_pci_msi_request(const struct pci_attach_args *pa, 217 pci_msi_handle_t *msihp, size_t nmsirq, int ipl, int capid) 218 { 219 return EOPNOTSUPP; 220 } 221 222 int 223 genppc_pci_msi_type(void *v, pci_msi_handle_t msih) 224 { 225 panic("%s", __func__); 226 } 227 228 size_t 229 genppc_pci_msi_available(void *v, pci_msi_handle_t msih) 230 { 231 panic("%s", __func__); 232 } 233 234 const char * 235 genppc_pci_msi_string(void *v, pci_msi_handle_t msih, size_t msirq) 236 { 237 panic("%s", __func__); 238 } 239 240 const struct evcnt * 241 genppc_pci_msi_evcnt(void *v, pci_msi_handle_t msih, size_t msirq) 242 { 243 panic("%s", __func__); 244 } 245 246 void * 247 genppc_pci_msi_establish(void *v, pci_msi_handle_t msih, size_t msirq, 248 int ipl, int (*func)(void *), void *arg) 249 { 250 panic("%s", __func__); 251 } 252 253 void * 254 genppc_pci_msix_establish(void *v, pci_msi_handle_t msih, size_t vec, 255 size_t msirq, int ipl, int (*func)(void *), void *arg) 256 { 257 panic("%s", __func__); 258 } 259 260 void 261 genppc_pci_msi_disestablish(void *v, void *ih) 262 { 263 panic("%s", __func__); 264 } 265 266 void 267 genppc_pci_msi_free(void *v, pci_msi_handle_t msih, size_t msirq) 268 { 269 panic("%s", __func__); 270 } 271 272 void 273 genppc_pci_msi_release(void *v, pci_msi_handle_t msih) 274 { 275 panic("%s", __func__); 276 } 277 278 void 279 genppc_pci_chipset_msi_init(pci_chipset_tag_t pc) 280 { 281 pc->pc_msi_request = genppc_pci_msi_request; 282 pc->pc_msi_type = genppc_pci_msi_type; 283 pc->pc_msi_available = genppc_pci_msi_available; 284 pc->pc_msi_evcnt = genppc_pci_msi_evcnt; 285 pc->pc_msi_string = genppc_pci_msi_string; 286 pc->pc_msi_establish = genppc_pci_msi_establish; 287 pc->pc_msix_establish = genppc_pci_msix_establish; 288 pc->pc_msi_disestablish = genppc_pci_msi_disestablish; 289 pc->pc_msi_free = genppc_pci_msi_free; 290 pc->pc_msi_release = genppc_pci_msi_release; 291 } 292 293 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH 294 #include <machine/isa_machdep.h> 295 #include "isa.h" 296 297 void *genppc_pciide_machdep_compat_intr_establish(device_t, 298 struct pci_attach_args *, int, int (*)(void *), void *); 299 300 void * 301 genppc_pciide_machdep_compat_intr_establish(device_t dev, 302 struct pci_attach_args *pa, int chan, int (*func)(void *), void *arg) 303 { 304 #if NISA > 0 305 int irq; 306 void *cookie; 307 308 irq = PCIIDE_COMPAT_IRQ(chan); 309 cookie = isa_intr_establish(NULL, irq, IST_LEVEL, IPL_BIO, func, arg); 310 if (cookie == NULL) 311 return (NULL); 312 aprint_normal_dev(dev, "%s channel interrupting at irq %d\n", 313 PCIIDE_CHANNEL_NAME(chan), irq); 314 return (cookie); 315 #else 316 panic("pciide_machdep_compat_intr_establish() called"); 317 #endif 318 } 319 #endif /* __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH */ 320