1 /*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * 4 * This software was developed by Semihalf under 5 * the sponsorship of the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bitset.h> 33 #include <sys/bitstring.h> 34 #include <sys/bus.h> 35 #include <sys/ctype.h> 36 #include <sys/endian.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/rman.h> 41 #include <sys/pciio.h> 42 #include <sys/pcpu.h> 43 #include <sys/proc.h> 44 #include <sys/socket.h> 45 #include <sys/cpuset.h> 46 #include <sys/lock.h> 47 #include <sys/mutex.h> 48 49 #include <net/ethernet.h> 50 #include <net/if.h> 51 #include <net/if_media.h> 52 53 #include <dev/ofw/openfirm.h> 54 #include <dev/ofw/ofw_bus.h> 55 #include <dev/mii/miivar.h> 56 57 #include "thunder_bgx.h" 58 #include "thunder_bgx_var.h" 59 60 #define CONN_TYPE_MAXLEN 16 61 #define CONN_TYPE_OFFSET 2 62 63 #define BGX_NODE_NAME "bgx" 64 #define BGX_MAXID 9 65 /* BGX func. 0, i.e.: reg = <0x8000 0 0 0 0>; DEVFN = 0x80 */ 66 #define BGX_DEVFN_0 0x80 67 68 #define FDT_NAME_MAXLEN 31 69 70 int bgx_fdt_init_phy(struct bgx *); 71 72 static void 73 bgx_fdt_get_macaddr(phandle_t phy, uint8_t *hwaddr) 74 { 75 uint8_t addr[ETHER_ADDR_LEN]; 76 77 if (OF_getprop(phy, "local-mac-address", addr, ETHER_ADDR_LEN) == -1) { 78 /* Missing MAC address should be marked by clearing it */ 79 memset(hwaddr, 0, ETHER_ADDR_LEN); 80 } else 81 memcpy(hwaddr, addr, ETHER_ADDR_LEN); 82 } 83 84 static boolean_t 85 bgx_fdt_phy_mode_match(struct bgx *bgx, char *qlm_mode, ssize_t size) 86 { 87 const char *type; 88 ssize_t sz; 89 ssize_t offset; 90 91 switch (bgx->qlm_mode) { 92 case QLM_MODE_SGMII: 93 type = "sgmii"; 94 sz = sizeof("sgmii"); 95 offset = size - sz; 96 break; 97 case QLM_MODE_XAUI_1X4: 98 type = "xaui"; 99 sz = sizeof("xaui"); 100 offset = size - sz; 101 if (offset < 0) 102 return (FALSE); 103 if (strncmp(&qlm_mode[offset], type, sz) == 0) 104 return (TRUE); 105 type = "dxaui"; 106 sz = sizeof("dxaui"); 107 offset = size - sz; 108 break; 109 case QLM_MODE_RXAUI_2X2: 110 type = "raui"; 111 sz = sizeof("raui"); 112 offset = size - sz; 113 break; 114 case QLM_MODE_XFI_4X1: 115 type = "xfi"; 116 sz = sizeof("xfi"); 117 offset = size - sz; 118 break; 119 case QLM_MODE_XLAUI_1X4: 120 type = "xlaui"; 121 sz = sizeof("xlaui"); 122 offset = size - sz; 123 break; 124 case QLM_MODE_10G_KR_4X1: 125 type = "xfi-10g-kr"; 126 sz = sizeof("xfi-10g-kr"); 127 offset = size - sz; 128 break; 129 case QLM_MODE_40G_KR4_1X4: 130 type = "xlaui-40g-kr"; 131 sz = sizeof("xlaui-40g-kr"); 132 offset = size - sz; 133 break; 134 default: 135 return (FALSE); 136 } 137 138 if (offset < 0) 139 return (FALSE); 140 141 if (strncmp(&qlm_mode[offset], type, sz) == 0) 142 return (TRUE); 143 144 return (FALSE); 145 } 146 147 static boolean_t 148 bgx_fdt_phy_name_match(struct bgx *bgx, char *phy_name, ssize_t size) 149 { 150 const char *type; 151 ssize_t sz; 152 char last; 153 154 switch (bgx->qlm_mode) { 155 case QLM_MODE_SGMII: 156 type = "sgmii"; 157 sz = sizeof("sgmii"); 158 break; 159 case QLM_MODE_XAUI_1X4: 160 type = "xaui"; 161 sz = sizeof("xaui"); 162 if (sz < size) 163 return (FALSE); 164 if (strncmp(phy_name, type, sz) == 0) 165 return (TRUE); 166 type = "dxaui"; 167 sz = sizeof("dxaui"); 168 break; 169 case QLM_MODE_RXAUI_2X2: 170 type = "raui"; 171 sz = sizeof("raui"); 172 break; 173 case QLM_MODE_XFI_4X1: 174 type = "xfi"; 175 sz = sizeof("xfi"); 176 break; 177 case QLM_MODE_XLAUI_1X4: 178 type = "xlaui"; 179 sz = sizeof("xlaui"); 180 break; 181 case QLM_MODE_10G_KR_4X1: 182 type = "xfi-10g-kr"; 183 sz = sizeof("xfi-10g-kr"); 184 break; 185 case QLM_MODE_40G_KR4_1X4: 186 type = "xlaui-40g-kr"; 187 sz = sizeof("xlaui-40g-kr"); 188 break; 189 default: 190 return (FALSE); 191 } 192 193 if (sz > size) 194 return (FALSE); 195 if (strncmp(phy_name, type, sz - 1) == 0) { 196 last = phy_name[sz - 1]; 197 if (last == '\0' || last == '@' || isdigit(last)) 198 return (TRUE); 199 } 200 return (FALSE); 201 } 202 203 static phandle_t 204 bgx_fdt_traverse_nodes(uint8_t unit, phandle_t start, char *name, 205 size_t len) 206 { 207 phandle_t node, ret; 208 uint32_t *reg; 209 size_t buf_size; 210 ssize_t proplen; 211 char *node_name; 212 int err; 213 214 /* 215 * Traverse all subordinate nodes of 'start' to find BGX instance. 216 * This supports both old (by name) and new (by reg) methods. 217 */ 218 buf_size = sizeof(*node_name) * FDT_NAME_MAXLEN; 219 if (len > buf_size) { 220 /* 221 * This is an erroneous situation since the string 222 * to compare cannot be longer than FDT_NAME_MAXLEN. 223 */ 224 return (0); 225 } 226 227 node_name = malloc(buf_size, M_BGX, M_WAITOK); 228 for (node = OF_child(start); node != 0; node = OF_peer(node)) { 229 /* Clean-up the buffer */ 230 memset(node_name, 0, buf_size); 231 /* Recurse to children */ 232 if (OF_child(node) != 0) { 233 ret = bgx_fdt_traverse_nodes(unit, node, name, len); 234 if (ret != 0) { 235 free(node_name, M_BGX); 236 return (ret); 237 } 238 } 239 /* 240 * Old way - by name 241 */ 242 proplen = OF_getproplen(node, "name"); 243 if ((proplen <= 0) || (proplen < len)) 244 continue; 245 246 err = OF_getprop(node, "name", node_name, proplen); 247 if (err <= 0) 248 continue; 249 250 if (strncmp(node_name, name, len) == 0) { 251 free(node_name, M_BGX); 252 return (node); 253 } 254 /* 255 * New way - by reg 256 */ 257 /* Check if even BGX */ 258 if (strncmp(node_name, 259 BGX_NODE_NAME, sizeof(BGX_NODE_NAME) - 1) != 0) 260 continue; 261 /* Get reg */ 262 err = OF_getencprop_alloc_multi(node, "reg", sizeof(*reg), 263 (void **)®); 264 if (err == -1) { 265 free(reg, M_OFWPROP); 266 continue; 267 } 268 269 /* Match BGX device function */ 270 if ((BGX_DEVFN_0 + unit) == (reg[0] >> 8)) { 271 free(reg, M_OFWPROP); 272 free(node_name, M_BGX); 273 return (node); 274 } 275 free(reg, M_OFWPROP); 276 } 277 free(node_name, M_BGX); 278 279 return (0); 280 } 281 282 /* 283 * Similar functionality to pci_find_pcie_root_port() 284 * but this one works for ThunderX. 285 */ 286 static device_t 287 bgx_find_root_pcib(device_t dev) 288 { 289 devclass_t pci_class; 290 device_t pcib, bus; 291 292 pci_class = devclass_find("pci"); 293 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class, 294 ("%s: non-pci device %s", __func__, device_get_nameunit(dev))); 295 296 /* Walk the bridge hierarchy until we find a non-PCI device */ 297 for (;;) { 298 bus = device_get_parent(dev); 299 KASSERT(bus != NULL, ("%s: null parent of %s", __func__, 300 device_get_nameunit(dev))); 301 302 if (device_get_devclass(bus) != pci_class) 303 return (NULL); 304 305 pcib = device_get_parent(bus); 306 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__, 307 device_get_nameunit(bus))); 308 309 /* 310 * If the parent of this PCIB is not PCI 311 * then we found our root PCIB. 312 */ 313 if (device_get_devclass(device_get_parent(pcib)) != pci_class) 314 return (pcib); 315 316 dev = pcib; 317 } 318 } 319 320 static __inline phandle_t 321 bgx_fdt_find_node(struct bgx *bgx) 322 { 323 device_t root_pcib; 324 phandle_t node; 325 char *bgx_sel; 326 size_t len; 327 328 KASSERT(bgx->bgx_id <= BGX_MAXID, 329 ("Invalid BGX ID: %d, max: %d", bgx->bgx_id, BGX_MAXID)); 330 331 len = sizeof(BGX_NODE_NAME) + 1; /* <bgx_name>+<digit>+<\0> */ 332 /* Allocate memory for BGX node name + "/" character */ 333 bgx_sel = malloc(sizeof(*bgx_sel) * (len + 1), M_BGX, 334 M_ZERO | M_WAITOK); 335 336 /* Prepare node's name */ 337 snprintf(bgx_sel, len + 1, "/"BGX_NODE_NAME"%d", bgx->bgx_id); 338 /* First try the root node */ 339 node = OF_finddevice(bgx_sel); 340 if (node != -1) { 341 /* Found relevant node */ 342 goto out; 343 } 344 /* 345 * Clean-up and try to find BGX in DT 346 * starting from the parent PCI bridge node. 347 */ 348 memset(bgx_sel, 0, sizeof(*bgx_sel) * (len + 1)); 349 snprintf(bgx_sel, len, BGX_NODE_NAME"%d", bgx->bgx_id); 350 351 /* Find PCI bridge that we are connected to */ 352 353 root_pcib = bgx_find_root_pcib(bgx->dev); 354 if (root_pcib == NULL) { 355 device_printf(bgx->dev, "Unable to find BGX root bridge\n"); 356 node = 0; 357 goto out; 358 } 359 360 node = ofw_bus_get_node(root_pcib); 361 if ((int)node <= 0) { 362 device_printf(bgx->dev, "No parent FDT node for BGX\n"); 363 goto out; 364 } 365 366 node = bgx_fdt_traverse_nodes(bgx->bgx_id, node, bgx_sel, len); 367 out: 368 free(bgx_sel, M_BGX); 369 return (node); 370 } 371 372 int 373 bgx_fdt_init_phy(struct bgx *bgx) 374 { 375 char *node_name; 376 phandle_t node, child; 377 phandle_t phy, mdio; 378 ssize_t len; 379 uint8_t lmac; 380 char qlm_mode[CONN_TYPE_MAXLEN]; 381 382 node = bgx_fdt_find_node(bgx); 383 if (node == 0) { 384 device_printf(bgx->dev, 385 "Could not find bgx%d node in FDT\n", bgx->bgx_id); 386 return (ENXIO); 387 } 388 389 lmac = 0; 390 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 391 len = OF_getprop(child, "qlm-mode", qlm_mode, sizeof(qlm_mode)); 392 if (len > 0) { 393 if (!bgx_fdt_phy_mode_match(bgx, qlm_mode, len)) { 394 /* 395 * Connection type not match with BGX mode. 396 */ 397 continue; 398 } 399 } else { 400 len = OF_getprop_alloc(child, "name", 401 (void **)&node_name); 402 if (len <= 0) { 403 continue; 404 } 405 406 if (!bgx_fdt_phy_name_match(bgx, node_name, len)) { 407 free(node_name, M_OFWPROP); 408 continue; 409 } 410 free(node_name, M_OFWPROP); 411 } 412 413 /* Acquire PHY address */ 414 if (OF_getencprop(child, "reg", &bgx->lmac[lmac].phyaddr, 415 sizeof(bgx->lmac[lmac].phyaddr)) <= 0) { 416 if (bootverbose) { 417 device_printf(bgx->dev, 418 "Could not retrieve PHY address\n"); 419 } 420 bgx->lmac[lmac].phyaddr = MII_PHY_ANY; 421 } 422 423 if (OF_getencprop(child, "phy-handle", &phy, 424 sizeof(phy)) <= 0) { 425 if (bootverbose) { 426 device_printf(bgx->dev, 427 "No phy-handle in PHY node. Skipping...\n"); 428 } 429 continue; 430 } 431 phy = OF_instance_to_package(phy); 432 /* 433 * Get PHY interface (MDIO bus) device. 434 * Driver must be already attached. 435 */ 436 mdio = OF_parent(phy); 437 bgx->lmac[lmac].phy_if_dev = 438 OF_device_from_xref(OF_xref_from_node(mdio)); 439 if (bgx->lmac[lmac].phy_if_dev == NULL) { 440 if (bootverbose) { 441 device_printf(bgx->dev, 442 "Could not find interface to PHY\n"); 443 } 444 continue; 445 } 446 447 /* Get mac address from FDT */ 448 bgx_fdt_get_macaddr(child, bgx->lmac[lmac].mac); 449 450 bgx->lmac[lmac].lmacid = lmac; 451 lmac++; 452 if (lmac == MAX_LMAC_PER_BGX) 453 break; 454 } 455 if (lmac == 0) { 456 device_printf(bgx->dev, "Could not find matching PHY\n"); 457 return (ENXIO); 458 } 459 460 return (0); 461 } 462