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/ctype.h> 39 #include <sys/endian.h> 40 #include <sys/kernel.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/rman.h> 44 #include <sys/pciio.h> 45 #include <sys/pcpu.h> 46 #include <sys/proc.h> 47 #include <sys/socket.h> 48 #include <sys/cpuset.h> 49 #include <sys/lock.h> 50 #include <sys/mutex.h> 51 52 #include <net/ethernet.h> 53 #include <net/if.h> 54 #include <net/if_media.h> 55 56 #include <dev/ofw/openfirm.h> 57 #include <dev/ofw/ofw_bus.h> 58 #include <dev/mii/miivar.h> 59 60 #include "thunder_bgx.h" 61 #include "thunder_bgx_var.h" 62 63 #define CONN_TYPE_MAXLEN 16 64 #define CONN_TYPE_OFFSET 2 65 66 #define BGX_NODE_NAME "bgx" 67 #define BGX_MAXID 9 68 /* BGX func. 0, i.e.: reg = <0x8000 0 0 0 0>; DEVFN = 0x80 */ 69 #define BGX_DEVFN_0 0x80 70 71 #define FDT_NAME_MAXLEN 31 72 73 int bgx_fdt_init_phy(struct bgx *); 74 75 static void 76 bgx_fdt_get_macaddr(phandle_t phy, uint8_t *hwaddr) 77 { 78 uint8_t addr[ETHER_ADDR_LEN]; 79 80 if (OF_getprop(phy, "local-mac-address", addr, ETHER_ADDR_LEN) == -1) { 81 /* Missing MAC address should be marked by clearing it */ 82 memset(hwaddr, 0, ETHER_ADDR_LEN); 83 } else 84 memcpy(hwaddr, addr, ETHER_ADDR_LEN); 85 } 86 87 static boolean_t 88 bgx_fdt_phy_mode_match(struct bgx *bgx, char *qlm_mode, ssize_t size) 89 { 90 const char *type; 91 ssize_t sz; 92 ssize_t offset; 93 94 switch (bgx->qlm_mode) { 95 case QLM_MODE_SGMII: 96 type = "sgmii"; 97 sz = sizeof("sgmii"); 98 offset = size - sz; 99 break; 100 case QLM_MODE_XAUI_1X4: 101 type = "xaui"; 102 sz = sizeof("xaui"); 103 offset = size - sz; 104 if (offset < 0) 105 return (FALSE); 106 if (strncmp(&qlm_mode[offset], type, sz) == 0) 107 return (TRUE); 108 type = "dxaui"; 109 sz = sizeof("dxaui"); 110 offset = size - sz; 111 break; 112 case QLM_MODE_RXAUI_2X2: 113 type = "raui"; 114 sz = sizeof("raui"); 115 offset = size - sz; 116 break; 117 case QLM_MODE_XFI_4X1: 118 type = "xfi"; 119 sz = sizeof("xfi"); 120 offset = size - sz; 121 break; 122 case QLM_MODE_XLAUI_1X4: 123 type = "xlaui"; 124 sz = sizeof("xlaui"); 125 offset = size - sz; 126 break; 127 case QLM_MODE_10G_KR_4X1: 128 type = "xfi-10g-kr"; 129 sz = sizeof("xfi-10g-kr"); 130 offset = size - sz; 131 break; 132 case QLM_MODE_40G_KR4_1X4: 133 type = "xlaui-40g-kr"; 134 sz = sizeof("xlaui-40g-kr"); 135 offset = size - sz; 136 break; 137 default: 138 return (FALSE); 139 } 140 141 if (offset < 0) 142 return (FALSE); 143 144 if (strncmp(&qlm_mode[offset], type, sz) == 0) 145 return (TRUE); 146 147 return (FALSE); 148 } 149 150 static boolean_t 151 bgx_fdt_phy_name_match(struct bgx *bgx, char *phy_name, ssize_t size) 152 { 153 const char *type; 154 ssize_t sz; 155 char last; 156 157 switch (bgx->qlm_mode) { 158 case QLM_MODE_SGMII: 159 type = "sgmii"; 160 sz = sizeof("sgmii"); 161 break; 162 case QLM_MODE_XAUI_1X4: 163 type = "xaui"; 164 sz = sizeof("xaui"); 165 if (sz < size) 166 return (FALSE); 167 if (strncmp(phy_name, type, sz) == 0) 168 return (TRUE); 169 type = "dxaui"; 170 sz = sizeof("dxaui"); 171 break; 172 case QLM_MODE_RXAUI_2X2: 173 type = "raui"; 174 sz = sizeof("raui"); 175 break; 176 case QLM_MODE_XFI_4X1: 177 type = "xfi"; 178 sz = sizeof("xfi"); 179 break; 180 case QLM_MODE_XLAUI_1X4: 181 type = "xlaui"; 182 sz = sizeof("xlaui"); 183 break; 184 case QLM_MODE_10G_KR_4X1: 185 type = "xfi-10g-kr"; 186 sz = sizeof("xfi-10g-kr"); 187 break; 188 case QLM_MODE_40G_KR4_1X4: 189 type = "xlaui-40g-kr"; 190 sz = sizeof("xlaui-40g-kr"); 191 break; 192 default: 193 return (FALSE); 194 } 195 196 if (sz > size) 197 return (FALSE); 198 if (strncmp(phy_name, type, sz - 1) == 0) { 199 last = phy_name[sz - 1]; 200 if (last == '\0' || last == '@' || isdigit(last)) 201 return (TRUE); 202 } 203 return (FALSE); 204 } 205 206 static phandle_t 207 bgx_fdt_traverse_nodes(uint8_t unit, phandle_t start, char *name, 208 size_t len) 209 { 210 phandle_t node, ret; 211 uint32_t *reg; 212 size_t buf_size; 213 ssize_t proplen; 214 char *node_name; 215 int err; 216 217 /* 218 * Traverse all subordinate nodes of 'start' to find BGX instance. 219 * This supports both old (by name) and new (by reg) methods. 220 */ 221 buf_size = sizeof(*node_name) * FDT_NAME_MAXLEN; 222 if (len > buf_size) { 223 /* 224 * This is an erroneous situation since the string 225 * to compare cannot be longer than FDT_NAME_MAXLEN. 226 */ 227 return (0); 228 } 229 230 node_name = malloc(buf_size, M_BGX, M_WAITOK); 231 for (node = OF_child(start); node != 0; node = OF_peer(node)) { 232 /* Clean-up the buffer */ 233 memset(node_name, 0, buf_size); 234 /* Recurse to children */ 235 if (OF_child(node) != 0) { 236 ret = bgx_fdt_traverse_nodes(unit, node, name, len); 237 if (ret != 0) { 238 free(node_name, M_BGX); 239 return (ret); 240 } 241 } 242 /* 243 * Old way - by name 244 */ 245 proplen = OF_getproplen(node, "name"); 246 if ((proplen <= 0) || (proplen < len)) 247 continue; 248 249 err = OF_getprop(node, "name", node_name, proplen); 250 if (err <= 0) 251 continue; 252 253 if (strncmp(node_name, name, len) == 0) { 254 free(node_name, M_BGX); 255 return (node); 256 } 257 /* 258 * New way - by reg 259 */ 260 /* Check if even BGX */ 261 if (strncmp(node_name, 262 BGX_NODE_NAME, sizeof(BGX_NODE_NAME) - 1) != 0) 263 continue; 264 /* Get reg */ 265 err = OF_getencprop_alloc_multi(node, "reg", sizeof(*reg), 266 (void **)®); 267 if (err == -1) { 268 free(reg, M_OFWPROP); 269 continue; 270 } 271 272 /* Match BGX device function */ 273 if ((BGX_DEVFN_0 + unit) == (reg[0] >> 8)) { 274 free(reg, M_OFWPROP); 275 free(node_name, M_BGX); 276 return (node); 277 } 278 free(reg, M_OFWPROP); 279 } 280 free(node_name, M_BGX); 281 282 return (0); 283 } 284 285 /* 286 * Similar functionality to pci_find_pcie_root_port() 287 * but this one works for ThunderX. 288 */ 289 static device_t 290 bgx_find_root_pcib(device_t dev) 291 { 292 devclass_t pci_class; 293 device_t pcib, bus; 294 295 pci_class = devclass_find("pci"); 296 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class, 297 ("%s: non-pci device %s", __func__, device_get_nameunit(dev))); 298 299 /* Walk the bridge hierarchy until we find a non-PCI device */ 300 for (;;) { 301 bus = device_get_parent(dev); 302 KASSERT(bus != NULL, ("%s: null parent of %s", __func__, 303 device_get_nameunit(dev))); 304 305 if (device_get_devclass(bus) != pci_class) 306 return (NULL); 307 308 pcib = device_get_parent(bus); 309 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__, 310 device_get_nameunit(bus))); 311 312 /* 313 * If the parent of this PCIB is not PCI 314 * then we found our root PCIB. 315 */ 316 if (device_get_devclass(device_get_parent(pcib)) != pci_class) 317 return (pcib); 318 319 dev = pcib; 320 } 321 } 322 323 static __inline phandle_t 324 bgx_fdt_find_node(struct bgx *bgx) 325 { 326 device_t root_pcib; 327 phandle_t node; 328 char *bgx_sel; 329 size_t len; 330 331 KASSERT(bgx->bgx_id <= BGX_MAXID, 332 ("Invalid BGX ID: %d, max: %d", bgx->bgx_id, BGX_MAXID)); 333 334 len = sizeof(BGX_NODE_NAME) + 1; /* <bgx_name>+<digit>+<\0> */ 335 /* Allocate memory for BGX node name + "/" character */ 336 bgx_sel = malloc(sizeof(*bgx_sel) * (len + 1), M_BGX, 337 M_ZERO | M_WAITOK); 338 339 /* Prepare node's name */ 340 snprintf(bgx_sel, len + 1, "/"BGX_NODE_NAME"%d", bgx->bgx_id); 341 /* First try the root node */ 342 node = OF_finddevice(bgx_sel); 343 if (node != -1) { 344 /* Found relevant node */ 345 goto out; 346 } 347 /* 348 * Clean-up and try to find BGX in DT 349 * starting from the parent PCI bridge node. 350 */ 351 memset(bgx_sel, 0, sizeof(*bgx_sel) * (len + 1)); 352 snprintf(bgx_sel, len, BGX_NODE_NAME"%d", bgx->bgx_id); 353 354 /* Find PCI bridge that we are connected to */ 355 356 root_pcib = bgx_find_root_pcib(bgx->dev); 357 if (root_pcib == NULL) { 358 device_printf(bgx->dev, "Unable to find BGX root bridge\n"); 359 node = 0; 360 goto out; 361 } 362 363 node = ofw_bus_get_node(root_pcib); 364 if ((int)node <= 0) { 365 device_printf(bgx->dev, "No parent FDT node for BGX\n"); 366 goto out; 367 } 368 369 node = bgx_fdt_traverse_nodes(bgx->bgx_id, node, bgx_sel, len); 370 out: 371 free(bgx_sel, M_BGX); 372 return (node); 373 } 374 375 int 376 bgx_fdt_init_phy(struct bgx *bgx) 377 { 378 char *node_name; 379 phandle_t node, child; 380 phandle_t phy, mdio; 381 ssize_t len; 382 uint8_t lmac; 383 char qlm_mode[CONN_TYPE_MAXLEN]; 384 385 node = bgx_fdt_find_node(bgx); 386 if (node == 0) { 387 device_printf(bgx->dev, 388 "Could not find bgx%d node in FDT\n", bgx->bgx_id); 389 return (ENXIO); 390 } 391 392 lmac = 0; 393 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 394 len = OF_getprop(child, "qlm-mode", qlm_mode, sizeof(qlm_mode)); 395 if (len > 0) { 396 if (!bgx_fdt_phy_mode_match(bgx, qlm_mode, len)) { 397 /* 398 * Connection type not match with BGX mode. 399 */ 400 continue; 401 } 402 } else { 403 len = OF_getprop_alloc(child, "name", 404 (void **)&node_name); 405 if (len <= 0) { 406 continue; 407 } 408 409 if (!bgx_fdt_phy_name_match(bgx, node_name, len)) { 410 free(node_name, M_OFWPROP); 411 continue; 412 } 413 free(node_name, M_OFWPROP); 414 } 415 416 /* Acquire PHY address */ 417 if (OF_getencprop(child, "reg", &bgx->lmac[lmac].phyaddr, 418 sizeof(bgx->lmac[lmac].phyaddr)) <= 0) { 419 if (bootverbose) { 420 device_printf(bgx->dev, 421 "Could not retrieve PHY address\n"); 422 } 423 bgx->lmac[lmac].phyaddr = MII_PHY_ANY; 424 } 425 426 if (OF_getencprop(child, "phy-handle", &phy, 427 sizeof(phy)) <= 0) { 428 if (bootverbose) { 429 device_printf(bgx->dev, 430 "No phy-handle in PHY node. Skipping...\n"); 431 } 432 continue; 433 } 434 phy = OF_instance_to_package(phy); 435 /* 436 * Get PHY interface (MDIO bus) device. 437 * Driver must be already attached. 438 */ 439 mdio = OF_parent(phy); 440 bgx->lmac[lmac].phy_if_dev = 441 OF_device_from_xref(OF_xref_from_node(mdio)); 442 if (bgx->lmac[lmac].phy_if_dev == NULL) { 443 if (bootverbose) { 444 device_printf(bgx->dev, 445 "Could not find interface to PHY\n"); 446 } 447 continue; 448 } 449 450 /* Get mac address from FDT */ 451 bgx_fdt_get_macaddr(child, bgx->lmac[lmac].mac); 452 453 bgx->lmac[lmac].lmacid = lmac; 454 lmac++; 455 if (lmac == MAX_LMAC_PER_BGX) 456 break; 457 } 458 if (lmac == 0) { 459 device_printf(bgx->dev, "Could not find matching PHY\n"); 460 return (ENXIO); 461 } 462 463 return (0); 464 } 465