1 /* $NetBSD: pci_machdep_common.c,v 1.20 2014/03/29 19:28:29 christos 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 1.20 2014/03/29 19:28:29 christos 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, char *buf, size_t len) 89 { 90 #ifdef ICU_LEN 91 if (ih == 0 || ih >= ICU_LEN 92 /* XXX on macppc it's completely legal to have PCI interrupts on a slave PIC */ 93 #ifdef IRQ_SLAVE 94 || ih == IRQ_SLAVE 95 #endif 96 ) 97 panic("pci_intr_string: bogus handle 0x%x", ih); 98 #endif 99 100 snprintf(buf, len, "irq %d", ih); 101 return buf; 102 103 } 104 105 const struct evcnt * 106 genppc_pci_intr_evcnt(void *v, pci_intr_handle_t ih) 107 { 108 109 /* XXX for now, no evcnt parent reported */ 110 return NULL; 111 } 112 113 void * 114 genppc_pci_intr_establish(void *v, pci_intr_handle_t ih, int level, 115 int (*func)(void *), void *arg) 116 { 117 118 #ifdef ICU_LEN 119 if (ih == 0 || ih >= ICU_LEN 120 #ifdef IRQ_SLAVE 121 || ih == IRQ_SLAVE 122 #endif 123 ) 124 panic("pci_intr_establish: bogus handle 0x%x", ih); 125 #endif 126 127 return intr_establish(ih, IST_LEVEL, level, func, arg); 128 } 129 130 void 131 genppc_pci_intr_disestablish(void *v, void *cookie) 132 { 133 134 intr_disestablish(cookie); 135 } 136 137 int 138 genppc_pci_intr_setattr(void *v, pci_intr_handle_t *ihp, int attr, 139 uint64_t data) 140 { 141 142 return ENODEV; 143 } 144 145 void 146 genppc_pci_conf_interrupt(void *v, int bus, int dev, int pin, 147 int swiz, int *iline) 148 { 149 /* do nothing */ 150 } 151 152 int 153 genppc_pci_conf_hook(void *v, int bus, int dev, int func, pcireg_t id) 154 { 155 return (PCI_CONF_DEFAULT); 156 } 157 158 int 159 genppc_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 160 { 161 int pin = pa->pa_intrpin; 162 int line = pa->pa_intrline; 163 164 #ifdef DEBUG 165 printf("%s: pin: %d, line: %d\n", __func__, pin, line); 166 #endif 167 168 if (pin == 0) { 169 /* No IRQ used. */ 170 aprint_error("pci_intr_map: interrupt pin %d\n", pin); 171 goto bad; 172 } 173 174 if (pin > 4) { 175 aprint_error("pci_intr_map: bad interrupt pin %d\n", pin); 176 goto bad; 177 } 178 179 /* 180 * Section 6.2.4, `Miscellaneous Functions', says that 255 means 181 * `unknown' or `no connection' on a PC. We assume that a device with 182 * `no connection' either doesn't have an interrupt (in which case the 183 * pin number should be 0, and would have been noticed above), or 184 * wasn't configured by the BIOS (in which case we punt, since there's 185 * no real way we can know how the interrupt lines are mapped in the 186 * hardware). 187 * 188 * XXX 189 * Since IRQ 0 is only used by the clock, and we can't actually be sure 190 * that the BIOS did its job, we also recognize that as meaning that 191 * the BIOS has not configured the device. 192 */ 193 if (line == 0 || line == 255) { 194 aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin); 195 goto bad; 196 #ifdef ICU_LEN 197 } else { 198 if (line >= ICU_LEN) { 199 aprint_error("pci_intr_map: bad interrupt line %d\n", line); 200 goto bad; 201 } 202 #endif 203 } 204 205 *ihp = line; 206 return 0; 207 208 bad: 209 *ihp = -1; 210 return 1; 211 } 212 213 int 214 genppc_pci_msi_request(const struct pci_attach_args *pa, 215 pci_msi_handle_t *msihp, size_t nmsirq, int ipl, int capid) 216 { 217 return EOPNOTSUPP; 218 } 219 220 int 221 genppc_pci_msi_type(void *v, pci_msi_handle_t msih) 222 { 223 panic("%s", __func__); 224 } 225 226 size_t 227 genppc_pci_msi_available(void *v, pci_msi_handle_t msih) 228 { 229 panic("%s", __func__); 230 } 231 232 const char * 233 genppc_pci_msi_string(void *v, pci_msi_handle_t msih, size_t msirq) 234 { 235 panic("%s", __func__); 236 } 237 238 const struct evcnt * 239 genppc_pci_msi_evcnt(void *v, pci_msi_handle_t msih, size_t msirq) 240 { 241 panic("%s", __func__); 242 } 243 244 void * 245 genppc_pci_msi_establish(void *v, pci_msi_handle_t msih, size_t msirq, 246 int ipl, int (*func)(void *), void *arg) 247 { 248 panic("%s", __func__); 249 } 250 251 void * 252 genppc_pci_msix_establish(void *v, pci_msi_handle_t msih, size_t vec, 253 size_t msirq, int ipl, int (*func)(void *), void *arg) 254 { 255 panic("%s", __func__); 256 } 257 258 void 259 genppc_pci_msi_disestablish(void *v, void *ih) 260 { 261 panic("%s", __func__); 262 } 263 264 void 265 genppc_pci_msi_free(void *v, pci_msi_handle_t msih, size_t msirq) 266 { 267 panic("%s", __func__); 268 } 269 270 void 271 genppc_pci_msi_release(void *v, pci_msi_handle_t msih) 272 { 273 panic("%s", __func__); 274 } 275 276 void 277 genppc_pci_chipset_msi_init(pci_chipset_tag_t pc) 278 { 279 pc->pc_msi_request = genppc_pci_msi_request; 280 pc->pc_msi_type = genppc_pci_msi_type; 281 pc->pc_msi_available = genppc_pci_msi_available; 282 pc->pc_msi_evcnt = genppc_pci_msi_evcnt; 283 pc->pc_msi_string = genppc_pci_msi_string; 284 pc->pc_msi_establish = genppc_pci_msi_establish; 285 pc->pc_msix_establish = genppc_pci_msix_establish; 286 pc->pc_msi_disestablish = genppc_pci_msi_disestablish; 287 pc->pc_msi_free = genppc_pci_msi_free; 288 pc->pc_msi_release = genppc_pci_msi_release; 289 } 290 291 #ifdef __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH 292 #include <machine/isa_machdep.h> 293 #include "isa.h" 294 295 void *genppc_pciide_machdep_compat_intr_establish(device_t, 296 struct pci_attach_args *, int, int (*)(void *), void *); 297 298 void * 299 genppc_pciide_machdep_compat_intr_establish(device_t dev, 300 struct pci_attach_args *pa, int chan, int (*func)(void *), void *arg) 301 { 302 #if NISA > 0 303 int irq; 304 void *cookie; 305 306 irq = PCIIDE_COMPAT_IRQ(chan); 307 cookie = isa_intr_establish(NULL, irq, IST_LEVEL, IPL_BIO, func, arg); 308 if (cookie == NULL) 309 return (NULL); 310 aprint_normal_dev(dev, "%s channel interrupting at irq %d\n", 311 PCIIDE_CHANNEL_NAME(chan), irq); 312 return (cookie); 313 #else 314 panic("pciide_machdep_compat_intr_establish() called"); 315 #endif 316 } 317 #endif /* __HAVE_PCIIDE_MACHDEP_COMPAT_INTR_ESTABLISH */ 318