amdpm.c revision 1.35.6.3
1 /* $NetBSD: amdpm.c,v 1.35.6.3 2014/08/20 00:03:41 tls 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 1.35.6.3 2014/08/20 00:03:41 tls 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/rnd.h> 43 #include <sys/mutex.h> 44 45 #include <sys/bus.h> 46 #include <dev/ic/acpipmtimer.h> 47 48 #include <dev/i2c/i2cvar.h> 49 50 #include <dev/pci/pcivar.h> 51 #include <dev/pci/pcireg.h> 52 #include <dev/pci/pcidevs.h> 53 54 #include <dev/pci/amdpmreg.h> 55 #include <dev/pci/amdpmvar.h> 56 #include <dev/pci/amdpm_smbusreg.h> 57 58 static void amdpm_rnd_callout(void *); 59 static void amdpm_rnd_callout_locked(void *); 60 61 #ifdef AMDPM_RND_COUNTERS 62 #define AMDPM_RNDCNT_INCR(ev) (ev)->ev_count++ 63 #endif 64 65 static int 66 amdpm_match(device_t parent, cfdata_t match, void *aux) 67 { 68 struct pci_attach_args *pa = aux; 69 70 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD) { 71 switch (PCI_PRODUCT(pa->pa_id)) { 72 case PCI_PRODUCT_AMD_PBC768_PMC: 73 case PCI_PRODUCT_AMD_PBC8111_ACPI: 74 return (1); 75 } 76 } 77 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NVIDIA) { 78 switch (PCI_PRODUCT(pa->pa_id)) { 79 case PCI_PRODUCT_NVIDIA_XBOX_SMBUS: 80 return (1); 81 } 82 } 83 84 return (0); 85 } 86 87 static void 88 amdpm_rnd_get(size_t bytes, void *priv) 89 { 90 struct amdpm_softc *sc = priv; 91 92 mutex_enter(&sc->sc_mutex); 93 sc->sc_rnd_need = bytes; 94 amdpm_rnd_callout_locked(sc); 95 mutex_exit(&sc->sc_mutex); 96 } 97 98 static void 99 amdpm_attach(device_t parent, device_t self, void *aux) 100 { 101 struct amdpm_softc *sc = device_private(self); 102 struct pci_attach_args *pa = aux; 103 pcireg_t confreg, pmptrreg; 104 u_int32_t pmreg; 105 int i; 106 107 pci_aprint_devinfo(pa, NULL); 108 109 sc->sc_dev = self; 110 111 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NVIDIA_XBOX_SMBUS) 112 sc->sc_nforce = 1; 113 else 114 sc->sc_nforce = 0; 115 116 sc->sc_pc = pa->pa_pc; 117 sc->sc_tag = pa->pa_tag; 118 sc->sc_iot = pa->pa_iot; 119 sc->sc_pa = pa; 120 121 #if 0 122 aprint_normal_dev(self, ""); 123 pci_conf_print(pa->pa_pc, pa->pa_tag, NULL); 124 #endif 125 126 confreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); 127 /* enable pm i/o space for AMD-8111 and nForce */ 128 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC8111_ACPI || 129 sc->sc_nforce) 130 confreg |= AMDPM_PMIOEN; 131 132 /* Enable random number generation for everyone */ 133 pci_conf_write(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG, 134 confreg | AMDPM_RNGEN); 135 confreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); 136 137 if ((confreg & AMDPM_PMIOEN) == 0) { 138 aprint_error_dev(self, "PMxx space isn't enabled\n"); 139 return; 140 } 141 142 if (sc->sc_nforce) { 143 pmptrreg = pci_conf_read(pa->pa_pc, pa->pa_tag, NFORCE_PMPTR); 144 aprint_normal_dev(self, "power management at 0x%04x\n", 145 NFORCE_PMBASE(pmptrreg)); 146 if (bus_space_map(sc->sc_iot, NFORCE_PMBASE(pmptrreg), 147 AMDPM_PMSIZE, 0, &sc->sc_ioh)) { 148 aprint_error_dev(self, "failed to map PMxx space\n"); 149 return; 150 } 151 } else { 152 pmptrreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_PMPTR); 153 if (bus_space_map(sc->sc_iot, AMDPM_PMBASE(pmptrreg), 154 AMDPM_PMSIZE, 0, &sc->sc_ioh)) { 155 aprint_error_dev(self, "failed to map PMxx space\n"); 156 return; 157 } 158 } 159 160 /* don't attach a timecounter on nforce boards */ 161 if ((confreg & AMDPM_TMRRST) == 0 && (confreg & AMDPM_STOPTMR) == 0 && 162 !sc->sc_nforce) { 163 acpipmtimer_attach(self, sc->sc_iot, sc->sc_ioh, 164 AMDPM_TMR, ((confreg & AMDPM_TMR32) ? ACPIPMT_32BIT : 0)); 165 } 166 167 /* XXX this mutex is IPL_VM because it can be taken by rnd_getmore() */ 168 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_VM); 169 170 /* try to attach devices on the smbus */ 171 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC8111_ACPI || 172 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC768_PMC || 173 sc->sc_nforce) { 174 amdpm_smbus_attach(sc); 175 } 176 177 if (confreg & AMDPM_RNGEN) { 178 /* Check to see if we can read data from the RNG. */ 179 (void) bus_space_read_4(sc->sc_iot, sc->sc_ioh, 180 AMDPM_RNGDATA); 181 for (i = 0; i < 1000; i++) { 182 pmreg = bus_space_read_4(sc->sc_iot, 183 sc->sc_ioh, AMDPM_RNGSTAT); 184 if (pmreg & AMDPM_RNGDONE) 185 break; 186 delay(1); 187 } 188 if ((pmreg & AMDPM_RNGDONE) != 0) { 189 aprint_normal_dev(self, "" 190 "random number generator enabled (apprx. %dms)\n", 191 i); 192 callout_init(&sc->sc_rnd_ch, CALLOUT_MPSAFE); 193 rndsource_setcb(&sc->sc_rnd_source, 194 amdpm_rnd_get, sc); 195 rnd_attach_source(&sc->sc_rnd_source, 196 device_xname(self), RND_TYPE_RNG, 197 RND_FLAG_COLLECT_VALUE|RND_FLAG_HASCB); 198 #ifdef AMDPM_RND_COUNTERS 199 evcnt_attach_dynamic(&sc->sc_rnd_hits, EVCNT_TYPE_MISC, 200 NULL, device_xname(self), "rnd hits"); 201 evcnt_attach_dynamic(&sc->sc_rnd_miss, EVCNT_TYPE_MISC, 202 NULL, device_xname(self), "rnd miss"); 203 for (i = 0; i < 256; i++) { 204 evcnt_attach_dynamic(&sc->sc_rnd_data[i], 205 EVCNT_TYPE_MISC, NULL, device_xname(self), 206 "rnd data"); 207 } 208 #endif 209 sc->sc_rnd_need = RND_POOLBITS / NBBY; 210 amdpm_rnd_callout(sc); 211 } 212 } 213 } 214 215 CFATTACH_DECL_NEW(amdpm, sizeof(struct amdpm_softc), 216 amdpm_match, amdpm_attach, NULL, NULL); 217 218 static void 219 amdpm_rnd_callout_locked(void *v) 220 { 221 struct amdpm_softc *sc = v; 222 u_int32_t rngreg; 223 #ifdef AMDPM_RND_COUNTERS 224 int i; 225 #endif 226 227 if (sc->sc_rnd_need < 1) { 228 callout_stop(&sc->sc_rnd_ch); 229 return; 230 } 231 232 if ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGSTAT) & 233 AMDPM_RNGDONE) != 0) { 234 rngreg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 235 AMDPM_RNGDATA); 236 rnd_add_data(&sc->sc_rnd_source, &rngreg, 237 sizeof(rngreg), sizeof(rngreg) * NBBY); 238 sc->sc_rnd_need -= sizeof(rngreg); 239 #ifdef AMDPM_RND_COUNTERS 240 AMDPM_RNDCNT_INCR(&sc->sc_rnd_hits); 241 for (i = 0; i < sizeof(rngreg); i++, rngreg >>= NBBY) 242 AMDPM_RNDCNT_INCR(&sc->sc_rnd_data[rngreg & 0xff]); 243 #endif 244 } 245 #ifdef AMDPM_RND_COUNTERS 246 else 247 AMDPM_RNDCNT_INCR(&sc->sc_rnd_miss); 248 #endif 249 if (sc->sc_rnd_need > 0) { 250 callout_reset(&sc->sc_rnd_ch, 1, amdpm_rnd_callout, sc); 251 } 252 } 253 254 static void 255 amdpm_rnd_callout(void *v) 256 { 257 struct amdpm_softc *sc = v; 258 259 mutex_enter(&sc->sc_mutex); 260 amdpm_rnd_callout_locked(v); 261 mutex_exit(&sc->sc_mutex); 262 } 263
Indexes created Wed Oct 01 07:09:59 GMT 2025