amdpm.c revision 1.39
1 /* $NetBSD: amdpm.c,v 1.39 2015/04/13 16:33:25 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Enami Tsugutomo. 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: amdpm.c,v 1.39 2015/04/13 16:33:25 riastradh Exp $"); 34 35 #include "opt_amdpm.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 #include <sys/callout.h> 42 #include <sys/rndpool.h> 43 #include <sys/rndsource.h> 44 #include <sys/mutex.h> 45 46 #include <sys/bus.h> 47 #include <dev/ic/acpipmtimer.h> 48 49 #include <dev/i2c/i2cvar.h> 50 51 #include <dev/pci/pcivar.h> 52 #include <dev/pci/pcireg.h> 53 #include <dev/pci/pcidevs.h> 54 55 #include <dev/pci/amdpmreg.h> 56 #include <dev/pci/amdpmvar.h> 57 #include <dev/pci/amdpm_smbusreg.h> 58 59 static void amdpm_rnd_callout(void *); 60 static void amdpm_rnd_callout_locked(void *); 61 62 #ifdef AMDPM_RND_COUNTERS 63 #define AMDPM_RNDCNT_INCR(ev) (ev)->ev_count++ 64 #endif 65 66 static int 67 amdpm_match(device_t parent, cfdata_t match, void *aux) 68 { 69 struct pci_attach_args *pa = aux; 70 71 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD) { 72 switch (PCI_PRODUCT(pa->pa_id)) { 73 case PCI_PRODUCT_AMD_PBC768_PMC: 74 case PCI_PRODUCT_AMD_PBC8111_ACPI: 75 return (1); 76 } 77 } 78 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NVIDIA) { 79 switch (PCI_PRODUCT(pa->pa_id)) { 80 case PCI_PRODUCT_NVIDIA_XBOX_SMBUS: 81 return (1); 82 } 83 } 84 85 return (0); 86 } 87 88 static void 89 amdpm_rnd_get(size_t bytes, void *priv) 90 { 91 struct amdpm_softc *sc = priv; 92 93 mutex_enter(&sc->sc_mutex); 94 sc->sc_rnd_need = bytes; 95 amdpm_rnd_callout_locked(sc); 96 mutex_exit(&sc->sc_mutex); 97 } 98 99 static void 100 amdpm_attach(device_t parent, device_t self, void *aux) 101 { 102 struct amdpm_softc *sc = device_private(self); 103 struct pci_attach_args *pa = aux; 104 pcireg_t confreg, pmptrreg; 105 u_int32_t pmreg; 106 int i; 107 108 pci_aprint_devinfo(pa, NULL); 109 110 sc->sc_dev = self; 111 112 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NVIDIA_XBOX_SMBUS) 113 sc->sc_nforce = 1; 114 else 115 sc->sc_nforce = 0; 116 117 sc->sc_pc = pa->pa_pc; 118 sc->sc_tag = pa->pa_tag; 119 sc->sc_iot = pa->pa_iot; 120 sc->sc_pa = pa; 121 122 #if 0 123 aprint_normal_dev(self, ""); 124 pci_conf_print(pa->pa_pc, pa->pa_tag, NULL); 125 #endif 126 127 confreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); 128 /* enable pm i/o space for AMD-8111 and nForce */ 129 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC8111_ACPI || 130 sc->sc_nforce) 131 confreg |= AMDPM_PMIOEN; 132 133 /* Enable random number generation for everyone */ 134 pci_conf_write(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG, 135 confreg | AMDPM_RNGEN); 136 confreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); 137 138 if ((confreg & AMDPM_PMIOEN) == 0) { 139 aprint_error_dev(self, "PMxx space isn't enabled\n"); 140 return; 141 } 142 143 if (sc->sc_nforce) { 144 pmptrreg = pci_conf_read(pa->pa_pc, pa->pa_tag, NFORCE_PMPTR); 145 aprint_normal_dev(self, "power management at 0x%04x\n", 146 NFORCE_PMBASE(pmptrreg)); 147 if (bus_space_map(sc->sc_iot, NFORCE_PMBASE(pmptrreg), 148 AMDPM_PMSIZE, 0, &sc->sc_ioh)) { 149 aprint_error_dev(self, "failed to map PMxx space\n"); 150 return; 151 } 152 } else { 153 pmptrreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_PMPTR); 154 if (bus_space_map(sc->sc_iot, AMDPM_PMBASE(pmptrreg), 155 AMDPM_PMSIZE, 0, &sc->sc_ioh)) { 156 aprint_error_dev(self, "failed to map PMxx space\n"); 157 return; 158 } 159 } 160 161 /* don't attach a timecounter on nforce boards */ 162 if ((confreg & AMDPM_TMRRST) == 0 && (confreg & AMDPM_STOPTMR) == 0 && 163 !sc->sc_nforce) { 164 acpipmtimer_attach(self, sc->sc_iot, sc->sc_ioh, 165 AMDPM_TMR, ((confreg & AMDPM_TMR32) ? ACPIPMT_32BIT : 0)); 166 } 167 168 /* XXX this mutex is IPL_VM because it can be taken by rnd_getmore() */ 169 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_VM); 170 171 /* try to attach devices on the smbus */ 172 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC8111_ACPI || 173 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC768_PMC || 174 sc->sc_nforce) { 175 amdpm_smbus_attach(sc); 176 } 177 178 if (confreg & AMDPM_RNGEN) { 179 /* Check to see if we can read data from the RNG. */ 180 (void) bus_space_read_4(sc->sc_iot, sc->sc_ioh, 181 AMDPM_RNGDATA); 182 for (i = 0; i < 1000; i++) { 183 pmreg = bus_space_read_4(sc->sc_iot, 184 sc->sc_ioh, AMDPM_RNGSTAT); 185 if (pmreg & AMDPM_RNGDONE) 186 break; 187 delay(1); 188 } 189 if ((pmreg & AMDPM_RNGDONE) != 0) { 190 aprint_normal_dev(self, "" 191 "random number generator enabled (apprx. %dms)\n", 192 i); 193 callout_init(&sc->sc_rnd_ch, CALLOUT_MPSAFE); 194 rndsource_setcb(&sc->sc_rnd_source, 195 amdpm_rnd_get, sc); 196 rnd_attach_source(&sc->sc_rnd_source, 197 device_xname(self), RND_TYPE_RNG, 198 RND_FLAG_COLLECT_VALUE|RND_FLAG_HASCB); 199 #ifdef AMDPM_RND_COUNTERS 200 evcnt_attach_dynamic(&sc->sc_rnd_hits, EVCNT_TYPE_MISC, 201 NULL, device_xname(self), "rnd hits"); 202 evcnt_attach_dynamic(&sc->sc_rnd_miss, EVCNT_TYPE_MISC, 203 NULL, device_xname(self), "rnd miss"); 204 for (i = 0; i < 256; i++) { 205 evcnt_attach_dynamic(&sc->sc_rnd_data[i], 206 EVCNT_TYPE_MISC, NULL, device_xname(self), 207 "rnd data"); 208 } 209 #endif 210 sc->sc_rnd_need = RND_POOLBITS / NBBY; 211 amdpm_rnd_callout(sc); 212 } 213 } 214 } 215 216 CFATTACH_DECL_NEW(amdpm, sizeof(struct amdpm_softc), 217 amdpm_match, amdpm_attach, NULL, NULL); 218 219 static void 220 amdpm_rnd_callout_locked(void *v) 221 { 222 struct amdpm_softc *sc = v; 223 u_int32_t rngreg; 224 #ifdef AMDPM_RND_COUNTERS 225 int i; 226 #endif 227 228 if (sc->sc_rnd_need < 1) { 229 callout_stop(&sc->sc_rnd_ch); 230 return; 231 } 232 233 if ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGSTAT) & 234 AMDPM_RNGDONE) != 0) { 235 rngreg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 236 AMDPM_RNGDATA); 237 rnd_add_data(&sc->sc_rnd_source, &rngreg, 238 sizeof(rngreg), sizeof(rngreg) * NBBY); 239 sc->sc_rnd_need -= sizeof(rngreg); 240 #ifdef AMDPM_RND_COUNTERS 241 AMDPM_RNDCNT_INCR(&sc->sc_rnd_hits); 242 for (i = 0; i < sizeof(rngreg); i++, rngreg >>= NBBY) 243 AMDPM_RNDCNT_INCR(&sc->sc_rnd_data[rngreg & 0xff]); 244 #endif 245 } 246 #ifdef AMDPM_RND_COUNTERS 247 else 248 AMDPM_RNDCNT_INCR(&sc->sc_rnd_miss); 249 #endif 250 if (sc->sc_rnd_need > 0) { 251 callout_reset(&sc->sc_rnd_ch, 1, amdpm_rnd_callout, sc); 252 } 253 } 254 255 static void 256 amdpm_rnd_callout(void *v) 257 { 258 struct amdpm_softc *sc = v; 259 260 mutex_enter(&sc->sc_mutex); 261 amdpm_rnd_callout_locked(v); 262 mutex_exit(&sc->sc_mutex); 263 } 264
Indexes created Wed Oct 01 07:09:59 GMT 2025