vbus.c revision 1.6
1 /* $NetBSD: vbus.c,v 1.6 2021/04/24 23:36:49 thorpej Exp $ */ 2 /* $OpenBSD: vbus.c,v 1.8 2015/09/27 11:29:20 kettenis Exp $ */ 3 /* 4 * Copyright (c) 2008 Mark Kettenis 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <sys/device.h> 21 #include <sys/malloc.h> 22 #include <sys/kmem.h> 23 #include <sys/systm.h> 24 25 #include <machine/autoconf.h> 26 #include <machine/hypervisor.h> 27 #include <machine/openfirm.h> 28 29 #include <sparc64/dev/vbusvar.h> 30 31 #include <sparc64/dev/iommureg.h> 32 33 #include <dev/clock_subr.h> 34 extern todr_chip_handle_t todr_handle; 35 36 #ifdef DEBUG 37 #define VBUS_INTR 0x01 38 int vbus_debug = 0x00|VBUS_INTR; 39 #define DPRINTF(l, s) do { if (vbus_debug & l) printf s; } while (0) 40 #else 41 #define DPRINTF(l, s) 42 #endif 43 44 struct vbus_softc { 45 device_t sc_dv; 46 bus_space_tag_t sc_bustag; 47 bus_dma_tag_t sc_dmatag; 48 }; 49 int vbus_cmp_cells(int *, int *, int *, int); 50 int vbus_match(device_t, cfdata_t, void *); 51 void vbus_attach(device_t, device_t, void *); 52 int vbus_print(void *, const char *); 53 54 CFATTACH_DECL_NEW(vbus, sizeof(struct vbus_softc), 55 vbus_match, vbus_attach, NULL, NULL); 56 57 void *vbus_intr_establish(bus_space_tag_t, int, int, 58 int (*)(void *), void *, void (*)(void)); 59 void vbus_intr_ack(struct intrhand *); 60 bus_space_tag_t vbus_alloc_bus_tag(struct vbus_softc *, bus_space_tag_t); 61 62 int 63 vbus_match(device_t parent, cfdata_t match, void *aux) 64 { 65 struct mainbus_attach_args *ma = aux; 66 67 if (strcmp(ma->ma_name, "virtual-devices") == 0) 68 return (1); 69 70 return (0); 71 } 72 73 void 74 vbus_attach(device_t parent, device_t self, void *aux) 75 { 76 struct vbus_softc *sc = device_private(self); 77 struct mainbus_attach_args *ma = aux; 78 int node; 79 80 sc->sc_bustag = vbus_alloc_bus_tag(sc, ma->ma_bustag); 81 sc->sc_dmatag = ma->ma_dmatag; 82 printf("\n"); 83 84 for (node = OF_child(ma->ma_node); node; node = OF_peer(node)) { 85 struct vbus_attach_args va; 86 char buf[32]; 87 88 bzero(&va, sizeof(va)); 89 va.va_node = node; 90 if (OF_getprop(node, "name", buf, sizeof(buf)) <= 0) 91 continue; 92 va.va_name = buf; 93 va.va_bustag = sc->sc_bustag; 94 va.va_dmatag = sc->sc_dmatag; 95 prom_getprop(node, "reg", sizeof(*va.va_reg), 96 &va.va_nreg, (void **)&va.va_reg); 97 prom_getprop(node, "interrupts", sizeof(*va.va_intr), 98 &va.va_nintr, (void **)&va.va_intr); 99 config_found(self, &va, vbus_print, CFARG_EOL); 100 } 101 102 struct vbus_attach_args va; 103 bzero(&va, sizeof(va)); 104 va.va_name = "rtc"; 105 config_found(self, &va, vbus_print, CFARG_EOL); 106 107 } 108 109 int 110 vbus_print(void *aux, const char *name) 111 { 112 struct vbus_attach_args *va = aux; 113 114 if (name) 115 printf("\"%s\" at %s", va->va_name, name); 116 return (UNCONF); 117 } 118 119 /* 120 * Compare a sequence of cells with a mask, return 1 if they match and 121 * 0 if they don't. 122 */ 123 int 124 vbus_cmp_cells(int *cell1, int *cell2, int *mask, int ncells) 125 { 126 int i; 127 128 for (i = 0; i < ncells; i++) { 129 if (((cell1[i] ^ cell2[i]) & mask[i]) != 0) 130 return (0); 131 } 132 return (1); 133 } 134 135 int 136 vbus_intr_map(int node, int ino, uint64_t *sysino) 137 { 138 int *imap = NULL, nimap; 139 int *reg = NULL, nreg; 140 int *imap_mask; 141 int parent; 142 int address_cells, interrupt_cells; 143 uint64_t devhandle; 144 uint64_t devino; 145 int len; 146 int err; 147 148 DPRINTF(VBUS_INTR, ("vbus_intr_map(): ino 0x%x\n", ino)); 149 150 parent = OF_parent(node); 151 152 address_cells = prom_getpropint(parent, "#address-cells", 2); 153 interrupt_cells = prom_getpropint(parent, "#interrupt-cells", 1); 154 KASSERT(interrupt_cells == 1); 155 156 len = OF_getproplen(parent, "interrupt-map-mask"); 157 if (len < (address_cells + interrupt_cells) * sizeof(int)) 158 return (-1); 159 imap_mask = malloc(len, M_DEVBUF, M_WAITOK); 160 if (OF_getprop(parent, "interrupt-map-mask", imap_mask, len) != len) 161 goto out; 162 163 if (prom_getprop(parent, "interrupt-map", sizeof(int), &nimap, (void **)&imap)) 164 panic("vbus: can't get interrupt-map"); 165 166 if (prom_getprop(node, "reg", sizeof(*reg), &nreg, (void **)®)) 167 panic("vbus: can't get reg"); 168 if (nreg < address_cells) 169 goto out; 170 171 while (nimap >= address_cells + interrupt_cells + 2) { 172 if (vbus_cmp_cells(imap, reg, imap_mask, address_cells) && 173 vbus_cmp_cells(&imap[address_cells], &ino, 174 &imap_mask[address_cells], interrupt_cells)) { 175 node = imap[address_cells + interrupt_cells]; 176 devino = imap[address_cells + interrupt_cells + 1]; 177 178 free(reg, M_DEVBUF); 179 reg = NULL; 180 181 if (prom_getprop(node, "reg", sizeof(*reg), &nreg, (void **)®)) 182 panic("vbus: can't get reg"); 183 184 devhandle = reg[0] & 0x0fffffff; 185 186 err = hv_intr_devino_to_sysino(devhandle, devino, sysino); 187 if (err != H_EOK) 188 goto out; 189 190 KASSERT(*sysino == INTVEC(*sysino)); 191 free(imap_mask, M_DEVBUF); 192 return (0); 193 } 194 imap += address_cells + interrupt_cells + 2; 195 nimap -= address_cells + interrupt_cells + 2; 196 } 197 198 out: 199 free(imap_mask, M_DEVBUF); 200 return (-1); 201 } 202 203 void * 204 vbus_intr_establish(bus_space_tag_t t, int ihandle, int level, 205 int (*handler)(void *), void *arg, void (*fastvec)(void) /* ignored */) 206 { 207 uint64_t sysino = INTVEC(ihandle); 208 struct intrhand *ih; 209 int ino; 210 int err; 211 212 DPRINTF(VBUS_INTR, ("vbus_intr_establish()\n")); 213 214 ino = INTINO(ihandle); 215 216 ih = intrhand_alloc(); 217 218 ih->ih_ivec = ihandle; 219 ih->ih_fun = handler; 220 ih->ih_arg = arg; 221 ih->ih_pil = level; 222 ih->ih_number = ino; 223 ih->ih_pending = 0; 224 225 intr_establish(ih->ih_pil, level != IPL_VM, ih); 226 ih->ih_ack = vbus_intr_ack; 227 228 err = hv_intr_settarget(sysino, cpus->ci_cpuid); 229 if (err != H_EOK) { 230 printf("hv_intr_settarget(%lu, %u) failed - err = %d\n", 231 (long unsigned int)sysino, cpus->ci_cpuid, err); 232 return (NULL); 233 } 234 235 /* Clear pending interrupts. */ 236 err = hv_intr_setstate(sysino, INTR_IDLE); 237 if (err != H_EOK) { 238 printf("hv_intr_setstate(%lu, INTR_IDLE) failed - err = %d\n", 239 (long unsigned int)sysino, err); 240 return (NULL); 241 } 242 243 err = hv_intr_setenabled(sysino, INTR_ENABLED); 244 if (err != H_EOK) { 245 printf("hv_intr_setenabled(%lu) failed - err = %d\n", 246 (long unsigned int)sysino, err); 247 return (NULL); 248 } 249 250 return (ih); 251 } 252 253 void 254 vbus_intr_ack(struct intrhand *ih) 255 { 256 DPRINTF(VBUS_INTR, ("vbus_intr_ack()\n")); 257 hv_intr_setstate(ih->ih_number, INTR_IDLE); 258 } 259 260 bus_space_tag_t 261 vbus_alloc_bus_tag(struct vbus_softc *sc, bus_space_tag_t parent) 262 { 263 struct sparc_bus_space_tag *bt; 264 265 bt = kmem_zalloc(sizeof(*bt), KM_SLEEP); 266 bt->cookie = sc; 267 bt->parent = parent; 268 bt->sparc_bus_map = parent->sparc_bus_map; 269 bt->sparc_intr_establish = vbus_intr_establish; 270 271 return (bt); 272 } 273
Indexes created Thu Sep 25 16:09:42 GMT 2025