1 /* $NetBSD: amdsmn.c,v 1.13 2022/04/27 06:59:25 msaitoh Exp $ */ 2 3 /*- 4 * Copyright (c) 2017, 2019 Conrad Meyer <cem@FreeBSD.org> 5 * All rights reserved. 6 * 7 * NetBSD port by Ian Clark <mrrooster@gmail.com> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: amdsmn.c,v 1.13 2022/04/27 06:59:25 msaitoh Exp $ "); 33 34 /* 35 * Driver for the AMD Family 15h (model 60+) and 17h CPU 36 * System Management Network. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/device.h> 41 #include <sys/errno.h> 42 #include <sys/mutex.h> 43 #include <sys/systm.h> 44 #include <sys/cpu.h> 45 #include <sys/module.h> 46 47 #include <machine/specialreg.h> 48 49 #include <dev/pci/pcireg.h> 50 #include <dev/pci/pcivar.h> 51 #include <dev/pci/pcidevs.h> 52 53 #include "amdsmn.h" 54 #include "ioconf.h" 55 56 #define F15H_SMN_ADDR_REG 0xb8 57 #define F15H_SMN_DATA_REG 0xbc 58 #define F17H_SMN_ADDR_REG 0x60 59 #define F17H_SMN_DATA_REG 0x64 60 61 struct amdsmn_softc { 62 kmutex_t smn_lock; 63 uint8_t smn_addr_reg; 64 uint8_t smn_data_reg; 65 struct pci_attach_args pa; 66 pci_chipset_tag_t pc; 67 pcitag_t pcitag; 68 }; 69 70 static const struct pciid { 71 uint16_t amdsmn_deviceid; 72 uint8_t amdsmn_addr_reg; 73 uint8_t amdsmn_data_reg; 74 } amdsmn_ids[] = { 75 { 76 .amdsmn_deviceid = PCI_PRODUCT_AMD_F15_6X_RC, 77 .amdsmn_addr_reg = F15H_SMN_ADDR_REG, 78 .amdsmn_data_reg = F15H_SMN_DATA_REG, 79 }, 80 { 81 .amdsmn_deviceid = PCI_PRODUCT_AMD_F17_RC, 82 .amdsmn_addr_reg = F17H_SMN_ADDR_REG, 83 .amdsmn_data_reg = F17H_SMN_DATA_REG, 84 }, 85 { 86 .amdsmn_deviceid = PCI_PRODUCT_AMD_F17_1X_RC, 87 .amdsmn_addr_reg = F17H_SMN_ADDR_REG, 88 .amdsmn_data_reg = F17H_SMN_DATA_REG, 89 }, 90 { 91 .amdsmn_deviceid = PCI_PRODUCT_AMD_F17_7X_RC, 92 .amdsmn_addr_reg = F17H_SMN_ADDR_REG, 93 .amdsmn_data_reg = F17H_SMN_DATA_REG, 94 }, 95 }; 96 97 static int amdsmn_match(device_t, cfdata_t, void *); 98 static void amdsmn_attach(device_t, device_t, void *); 99 static int amdsmn_rescan(device_t, const char *, const int *); 100 static int amdsmn_detach(device_t, int); 101 static int amdsmn_misc_search(device_t, cfdata_t, const int *, void *); 102 103 CFATTACH_DECL3_NEW(amdsmn, sizeof(struct amdsmn_softc), amdsmn_match, 104 amdsmn_attach, amdsmn_detach, NULL, amdsmn_rescan, NULL, 0); 105 106 static int 107 amdsmn_match(device_t parent, cfdata_t match, void *aux) 108 { 109 struct pci_attach_args *pa = aux; 110 size_t i; 111 112 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_AMD) 113 return 0; 114 115 for (i = 0; i < __arraycount(amdsmn_ids); i++) 116 if (PCI_PRODUCT(pa->pa_id) == amdsmn_ids[i].amdsmn_deviceid) 117 return 2; 118 119 return 0; 120 } 121 122 static int 123 amdsmn_misc_search(device_t parent, cfdata_t cf, const int *locs, void *aux) 124 { 125 if (config_probe(parent, cf, aux)) 126 config_attach(parent, cf, aux, NULL, 127 CFARGS(.locators = locs)); 128 129 return 0; 130 } 131 132 static void 133 amdsmn_attach(device_t parent, device_t self, void *aux) 134 { 135 struct amdsmn_softc *sc = device_private(self); 136 struct pci_attach_args *pa = aux; 137 size_t i; 138 139 mutex_init(&sc->smn_lock, MUTEX_DEFAULT, IPL_NONE); 140 sc->pa = *pa; 141 sc->pc = pa->pa_pc; 142 sc->pcitag = pa->pa_tag; 143 144 for (i = 0; i < __arraycount(amdsmn_ids); i++) 145 if (PCI_PRODUCT(pa->pa_id) == amdsmn_ids[i].amdsmn_deviceid) { 146 sc->smn_addr_reg = amdsmn_ids[i].amdsmn_addr_reg; 147 sc->smn_data_reg = amdsmn_ids[i].amdsmn_data_reg; 148 } 149 150 // aprint_normal(": AMD Family 17h System Management Network\n"); 151 aprint_normal(": AMD System Management Network\n"); 152 amdsmn_rescan(self, NULL, NULL); 153 } 154 155 static int 156 amdsmn_rescan(device_t self, const char *ifattr, const int *locators) 157 { 158 struct amdsmn_softc *sc = device_private(self); 159 160 config_search(self, &sc->pa, 161 CFARGS(.search = amdsmn_misc_search)); 162 163 return 0; 164 } 165 166 static int 167 amdsmn_detach(device_t self, int flags) 168 { 169 struct amdsmn_softc *sc = device_private(self); 170 171 mutex_destroy(&sc->smn_lock); 172 aprint_normal_dev(self,"detach!\n"); 173 174 return 0; 175 } 176 177 int 178 amdsmn_read(device_t dev, uint32_t addr, uint32_t *value) 179 { 180 struct amdsmn_softc *sc = device_private(dev); 181 182 mutex_enter(&sc->smn_lock); 183 pci_conf_write(sc->pc, sc->pcitag, sc->smn_addr_reg, addr); 184 *value = pci_conf_read(sc->pc, sc->pcitag, sc->smn_data_reg); 185 mutex_exit(&sc->smn_lock); 186 187 return 0; 188 } 189 190 int 191 amdsmn_write(device_t dev, uint32_t addr, uint32_t value) 192 { 193 struct amdsmn_softc *sc = device_private(dev); 194 195 mutex_enter(&sc->smn_lock); 196 pci_conf_write(sc->pc, sc->pcitag, sc->smn_addr_reg, addr); 197 pci_conf_write(sc->pc, sc->pcitag, sc->smn_data_reg, value); 198 mutex_exit(&sc->smn_lock); 199 200 return 0; 201 } 202 203 MODULE(MODULE_CLASS_DRIVER, amdsmn, "pci"); 204 205 #ifdef _MODULE 206 #include "ioconf.c" 207 #endif 208 209 static int 210 amdsmn_modcmd(modcmd_t cmd, void *opaque) 211 { 212 int error = 0; 213 214 #ifdef _MODULE 215 switch (cmd) { 216 case MODULE_CMD_INIT: 217 error = config_init_component(cfdriver_ioconf_amdsmn, 218 cfattach_ioconf_amdsmn, cfdata_ioconf_amdsmn); 219 break; 220 case MODULE_CMD_FINI: 221 error = config_fini_component(cfdriver_ioconf_amdsmn, 222 cfattach_ioconf_amdsmn, cfdata_ioconf_amdsmn); 223 break; 224 default: 225 error = ENOTTY; 226 break; 227 } 228 #endif 229 230 return error; 231 } 232 233