1 /*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Semihalf under 6 * the sponsorship of the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bitset.h> 36 #include <sys/bitstring.h> 37 #include <sys/bus.h> 38 #include <sys/endian.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/rman.h> 43 #include <sys/pciio.h> 44 #include <sys/pcpu.h> 45 #include <sys/proc.h> 46 #include <sys/socket.h> 47 #include <sys/cpuset.h> 48 #include <sys/lock.h> 49 #include <sys/mutex.h> 50 51 #include <net/ethernet.h> 52 #include <net/if.h> 53 #include <net/if_media.h> 54 55 #include <dev/ofw/openfirm.h> 56 #include <dev/ofw/ofw_bus.h> 57 #include <dev/mii/miivar.h> 58 59 #include "thunder_bgx.h" 60 #include "thunder_bgx_var.h" 61 62 #define CONN_TYPE_MAXLEN 16 63 #define CONN_TYPE_OFFSET 2 64 65 #define BGX_NODE_NAME "bgx" 66 #define BGX_MAXID 9 67 /* BGX func. 0, i.e.: reg = <0x8000 0 0 0 0>; DEVFN = 0x80 */ 68 #define BGX_DEVFN_0 0x80 69 70 #define FDT_NAME_MAXLEN 31 71 72 int bgx_fdt_init_phy(struct bgx *); 73 74 static void 75 bgx_fdt_get_macaddr(phandle_t phy, uint8_t *hwaddr) 76 { 77 uint8_t addr[ETHER_ADDR_LEN]; 78 79 if (OF_getprop(phy, "local-mac-address", addr, ETHER_ADDR_LEN) == -1) { 80 /* Missing MAC address should be marked by clearing it */ 81 memset(hwaddr, 0, ETHER_ADDR_LEN); 82 } else 83 memcpy(hwaddr, addr, ETHER_ADDR_LEN); 84 } 85 86 static boolean_t 87 bgx_fdt_phy_mode_match(struct bgx *bgx, char *qlm_mode, ssize_t size) 88 { 89 const char *type; 90 ssize_t sz; 91 ssize_t offset; 92 93 switch (bgx->qlm_mode) { 94 case QLM_MODE_SGMII: 95 type = "sgmii"; 96 sz = sizeof("sgmii") - 1; 97 offset = size - sz; 98 break; 99 case QLM_MODE_XAUI_1X4: 100 type = "xaui"; 101 sz = sizeof("xaui") - 1; 102 offset = size - sz; 103 if (offset < 0) 104 return (FALSE); 105 if (strncmp(&qlm_mode[offset], type, sz) == 0) 106 return (TRUE); 107 type = "dxaui"; 108 sz = sizeof("dxaui") - 1; 109 offset = size - sz; 110 break; 111 case QLM_MODE_RXAUI_2X2: 112 type = "raui"; 113 sz = sizeof("raui") - 1; 114 offset = size - sz; 115 break; 116 case QLM_MODE_XFI_4X1: 117 type = "xfi"; 118 sz = sizeof("xfi") - 1; 119 offset = size - sz; 120 break; 121 case QLM_MODE_XLAUI_1X4: 122 type = "xlaui"; 123 sz = sizeof("xlaui") - 1; 124 offset = size - sz; 125 break; 126 case QLM_MODE_10G_KR_4X1: 127 type = "xfi-10g-kr"; 128 sz = sizeof("xfi-10g-kr") - 1; 129 offset = size - sz; 130 break; 131 case QLM_MODE_40G_KR4_1X4: 132 type = "xlaui-40g-kr"; 133 sz = sizeof("xlaui-40g-kr") - 1; 134 offset = size - sz; 135 break; 136 default: 137 return (FALSE); 138 } 139 140 if (offset < 0) 141 return (FALSE); 142 143 if (strncmp(&qlm_mode[offset], type, sz) == 0) 144 return (TRUE); 145 146 return (FALSE); 147 } 148 149 static boolean_t 150 bgx_fdt_phy_name_match(struct bgx *bgx, char *phy_name, ssize_t size) 151 { 152 const char *type; 153 ssize_t sz; 154 155 switch (bgx->qlm_mode) { 156 case QLM_MODE_SGMII: 157 type = "sgmii"; 158 sz = sizeof("sgmii") - 1; 159 break; 160 case QLM_MODE_XAUI_1X4: 161 type = "xaui"; 162 sz = sizeof("xaui") - 1; 163 if (sz < size) 164 return (FALSE); 165 if (strncmp(phy_name, type, sz) == 0) 166 return (TRUE); 167 type = "dxaui"; 168 sz = sizeof("dxaui") - 1; 169 break; 170 case QLM_MODE_RXAUI_2X2: 171 type = "raui"; 172 sz = sizeof("raui") - 1; 173 break; 174 case QLM_MODE_XFI_4X1: 175 type = "xfi"; 176 sz = sizeof("xfi") - 1; 177 break; 178 case QLM_MODE_XLAUI_1X4: 179 type = "xlaui"; 180 sz = sizeof("xlaui") - 1; 181 break; 182 case QLM_MODE_10G_KR_4X1: 183 type = "xfi-10g-kr"; 184 sz = sizeof("xfi-10g-kr") - 1; 185 break; 186 case QLM_MODE_40G_KR4_1X4: 187 type = "xlaui-40g-kr"; 188 sz = sizeof("xlaui-40g-kr") - 1; 189 break; 190 default: 191 return (FALSE); 192 } 193 194 if (sz > size) 195 return (FALSE); 196 if (strncmp(phy_name, type, sz) == 0) 197 return (TRUE); 198 199 return (FALSE); 200 } 201 202 static phandle_t 203 bgx_fdt_traverse_nodes(uint8_t unit, phandle_t start, char *name, 204 size_t len) 205 { 206 phandle_t node, ret; 207 uint32_t *reg; 208 size_t buf_size; 209 ssize_t proplen; 210 char *node_name; 211 int err; 212 213 /* 214 * Traverse all subordinate nodes of 'start' to find BGX instance. 215 * This supports both old (by name) and new (by reg) methods. 216 */ 217 buf_size = sizeof(*node_name) * FDT_NAME_MAXLEN; 218 if (len > buf_size) { 219 /* 220 * This is an erroneous situation since the string 221 * to compare cannot be longer than FDT_NAME_MAXLEN. 222 */ 223 return (0); 224 } 225 226 node_name = malloc(buf_size, M_BGX, M_WAITOK); 227 for (node = OF_child(start); node != 0; node = OF_peer(node)) { 228 /* Clean-up the buffer */ 229 memset(node_name, 0, buf_size); 230 /* Recurse to children */ 231 if (OF_child(node) != 0) { 232 ret = bgx_fdt_traverse_nodes(unit, node, name, len); 233 if (ret != 0) { 234 free(node_name, M_BGX); 235 return (ret); 236 } 237 } 238 /* 239 * Old way - by name 240 */ 241 proplen = OF_getproplen(node, "name"); 242 if ((proplen <= 0) || (proplen < len)) 243 continue; 244 245 err = OF_getprop(node, "name", node_name, proplen); 246 if (err <= 0) 247 continue; 248 249 if (strncmp(node_name, name, len) == 0) { 250 free(node_name, M_BGX); 251 return (node); 252 } 253 /* 254 * New way - by reg 255 */ 256 /* Check if even BGX */ 257 if (strncmp(node_name, 258 BGX_NODE_NAME, sizeof(BGX_NODE_NAME) - 1) != 0) 259 continue; 260 /* Get reg */ 261 err = OF_getencprop_alloc(node, "reg", sizeof(*reg), 262 (void **)®); 263 if (err == -1) { 264 free(reg, M_OFWPROP); 265 continue; 266 } 267 268 /* Match BGX device function */ 269 if ((BGX_DEVFN_0 + unit) == (reg[0] >> 8)) { 270 free(reg, M_OFWPROP); 271 free(node_name, M_BGX); 272 return (node); 273 } 274 free(reg, M_OFWPROP); 275 } 276 free(node_name, M_BGX); 277 278 return (0); 279 } 280 281 /* 282 * Similar functionality to pci_find_pcie_root_port() 283 * but this one works for ThunderX. 284 */ 285 static device_t 286 bgx_find_root_pcib(device_t dev) 287 { 288 devclass_t pci_class; 289 device_t pcib, bus; 290 291 pci_class = devclass_find("pci"); 292 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class, 293 ("%s: non-pci device %s", __func__, device_get_nameunit(dev))); 294 295 /* Walk the bridge hierarchy until we find a non-PCI device */ 296 for (;;) { 297 bus = device_get_parent(dev); 298 KASSERT(bus != NULL, ("%s: null parent of %s", __func__, 299 device_get_nameunit(dev))); 300 301 if (device_get_devclass(bus) != pci_class) 302 return (NULL); 303 304 pcib = device_get_parent(bus); 305 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__, 306 device_get_nameunit(bus))); 307 308 /* 309 * If the parent of this PCIB is not PCI 310 * then we found our root PCIB. 311 */ 312 if (device_get_devclass(device_get_parent(pcib)) != pci_class) 313 return (pcib); 314 315 dev = pcib; 316 } 317 } 318 319 static __inline phandle_t 320 bgx_fdt_find_node(struct bgx *bgx) 321 { 322 device_t root_pcib; 323 phandle_t node; 324 char *bgx_sel; 325 size_t len; 326 327 KASSERT(bgx->bgx_id <= BGX_MAXID, 328 ("Invalid BGX ID: %d, max: %d", bgx->bgx_id, BGX_MAXID)); 329 330 len = sizeof(BGX_NODE_NAME) + 1; /* <bgx_name>+<digit>+<\0> */ 331 /* Allocate memory for BGX node name + "/" character */ 332 bgx_sel = malloc(sizeof(*bgx_sel) * (len + 1), M_BGX, 333 M_ZERO | M_WAITOK); 334 335 /* Prepare node's name */ 336 snprintf(bgx_sel, len + 1, "/"BGX_NODE_NAME"%d", bgx->bgx_id); 337 /* First try the root node */ 338 node = OF_finddevice(bgx_sel); 339 if ((int)node > 0) { 340 /* Found relevant node */ 341 goto out; 342 } 343 /* 344 * Clean-up and try to find BGX in DT 345 * starting from the parent PCI bridge node. 346 */ 347 memset(bgx_sel, 0, sizeof(*bgx_sel) * (len + 1)); 348 snprintf(bgx_sel, len, BGX_NODE_NAME"%d", bgx->bgx_id); 349 350 /* Find PCI bridge that we are connected to */ 351 352 root_pcib = bgx_find_root_pcib(bgx->dev); 353 if (root_pcib == NULL) { 354 device_printf(bgx->dev, "Unable to find BGX root bridge\n"); 355 node = 0; 356 goto out; 357 } 358 359 node = ofw_bus_get_node(root_pcib); 360 if ((int)node <= 0) { 361 device_printf(bgx->dev, "No parent FDT node for BGX\n"); 362 goto out; 363 } 364 365 node = bgx_fdt_traverse_nodes(bgx->bgx_id, node, bgx_sel, len); 366 out: 367 free(bgx_sel, M_BGX); 368 return (node); 369 } 370 371 int 372 bgx_fdt_init_phy(struct bgx *bgx) 373 { 374 char *node_name; 375 phandle_t node, child; 376 phandle_t phy, mdio; 377 ssize_t len; 378 uint8_t lmac; 379 char qlm_mode[CONN_TYPE_MAXLEN]; 380 381 node = bgx_fdt_find_node(bgx); 382 if (node == 0) { 383 device_printf(bgx->dev, 384 "Could not find bgx%d node in FDT\n", bgx->bgx_id); 385 return (ENXIO); 386 } 387 388 lmac = 0; 389 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 390 len = OF_getprop(child, "qlm-mode", qlm_mode, sizeof(qlm_mode)); 391 if (len > 0) { 392 if (!bgx_fdt_phy_mode_match(bgx, qlm_mode, len)) { 393 /* 394 * Connection type not match with BGX mode. 395 */ 396 continue; 397 } 398 } else { 399 len = OF_getprop_alloc(child, "name", 1, 400 (void **)&node_name); 401 if (len <= 0) { 402 continue; 403 } 404 405 if (!bgx_fdt_phy_name_match(bgx, node_name, len)) { 406 free(node_name, M_OFWPROP); 407 continue; 408 } 409 free(node_name, M_OFWPROP); 410 } 411 412 /* Acquire PHY address */ 413 if (OF_getencprop(child, "reg", &bgx->lmac[lmac].phyaddr, 414 sizeof(bgx->lmac[lmac].phyaddr)) <= 0) { 415 if (bootverbose) { 416 device_printf(bgx->dev, 417 "Could not retrieve PHY address\n"); 418 } 419 bgx->lmac[lmac].phyaddr = MII_PHY_ANY; 420 } 421 422 if (OF_getencprop(child, "phy-handle", &phy, 423 sizeof(phy)) <= 0) { 424 if (bootverbose) { 425 device_printf(bgx->dev, 426 "No phy-handle in PHY node. Skipping...\n"); 427 } 428 continue; 429 } 430 phy = OF_instance_to_package(phy); 431 /* 432 * Get PHY interface (MDIO bus) device. 433 * Driver must be already attached. 434 */ 435 mdio = OF_parent(phy); 436 bgx->lmac[lmac].phy_if_dev = 437 OF_device_from_xref(OF_xref_from_node(mdio)); 438 if (bgx->lmac[lmac].phy_if_dev == NULL) { 439 if (bootverbose) { 440 device_printf(bgx->dev, 441 "Could not find interface to PHY\n"); 442 } 443 continue; 444 } 445 446 /* Get mac address from FDT */ 447 bgx_fdt_get_macaddr(child, bgx->lmac[lmac].mac); 448 449 bgx->lmac[lmac].lmacid = lmac; 450 lmac++; 451 if (lmac == MAX_LMAC_PER_BGX) 452 break; 453 } 454 if (lmac == 0) { 455 device_printf(bgx->dev, "Could not find matching PHY\n"); 456 return (ENXIO); 457 } 458 459 return (0); 460 } 461