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 68#define FDT_NAME_MAXLEN 31 69 70int bgx_fdt_init_phy(struct bgx *); 71 72static void 73bgx_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 84static boolean_t 85bgx_fdt_phy_mode_match(struct bgx *bgx, char *qlm_mode, size_t size) 86{ 87 88 size -= CONN_TYPE_OFFSET; 89 90 switch (bgx->qlm_mode) { 91 case QLM_MODE_SGMII: 92 if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "sgmii", size) == 0) 93 return (TRUE); 94 break; 95 case QLM_MODE_XAUI_1X4: 96 if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xaui", size) == 0) 97 return (TRUE); 98 if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "dxaui", size) == 0) 99 return (TRUE); 100 break; 101 case QLM_MODE_RXAUI_2X2: 102 if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "raui", size) == 0) 103 return (TRUE); 104 break; 105 case QLM_MODE_XFI_4X1: 106 if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xfi", size) == 0) 107 return (TRUE); 108 break; 109 case QLM_MODE_XLAUI_1X4: 110 if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xlaui", size) == 0) 111 return (TRUE); 112 break; 113 case QLM_MODE_10G_KR_4X1: 114 if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xfi-10g-kr", size) == 0) 115 return (TRUE); 116 break; 117 case QLM_MODE_40G_KR4_1X4: 118 if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xlaui-40g-kr", size) == 0) 119 return (TRUE); 120 break; 121 default: 122 return (FALSE); 123 } 124 125 return (FALSE); 126} 127 128static phandle_t 129bgx_fdt_traverse_nodes(phandle_t start, char *name, size_t len) 130{ 131 phandle_t node, ret; 132 size_t buf_size; 133 char *node_name; 134 int err; 135 136 buf_size = sizeof(*node_name) * FDT_NAME_MAXLEN; 137 if (len > buf_size) { 138 /* 139 * This is an erroneous situation since the string 140 * to compare cannot be longer than FDT_NAME_MAXLEN. 141 */ 142 return (0); 143 } 144 145 node_name = malloc(buf_size, M_BGX, M_WAITOK); 146 for (node = OF_child(start); node != 0; node = OF_peer(node)) { 147 /* Clean-up the buffer */ 148 memset(node_name, 0, buf_size); 149 /* Recurse to children */ 150 if (OF_child(node) != 0) { 151 ret = bgx_fdt_traverse_nodes(node, name, len); 152 if (ret != 0) { 153 free(node_name, M_BGX); 154 return (ret); 155 } 156 } 157 err = OF_getprop(node, "name", node_name, FDT_NAME_MAXLEN); 158 if ((err > 0) && (strncmp(node_name, name, len) == 0)) { 159 free(node_name, M_BGX); 160 return (node); 161 } 162 } 163 free(node_name, M_BGX); 164 165 return (0); 166} 167 168/* 169 * Similar functionality to pci_find_pcie_root_port() 170 * but this one works for ThunderX. 171 */ 172static device_t 173bgx_find_root_pcib(device_t dev) 174{ 175 devclass_t pci_class; 176 device_t pcib, bus; 177 178 pci_class = devclass_find("pci"); 179 KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class, 180 ("%s: non-pci device %s", __func__, device_get_nameunit(dev))); 181 182 /* Walk the bridge hierarchy until we find a non-PCI device */ 183 for (;;) { 184 bus = device_get_parent(dev); 185 KASSERT(bus != NULL, ("%s: null parent of %s", __func__, 186 device_get_nameunit(dev))); 187 188 if (device_get_devclass(bus) != pci_class) 189 return (NULL); 190 191 pcib = device_get_parent(bus); 192 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__, 193 device_get_nameunit(bus))); 194 195 /* 196 * If the parent of this PCIB is not PCI 197 * then we found our root PCIB. 198 */ 199 if (device_get_devclass(device_get_parent(pcib)) != pci_class) 200 return (pcib); 201 202 dev = pcib; 203 } 204} 205 206static __inline phandle_t 207bgx_fdt_find_node(struct bgx *bgx) 208{ 209 device_t root_pcib; 210 phandle_t node; 211 char *bgx_sel; 212 size_t len; 213 214 KASSERT(bgx->bgx_id <= BGX_MAXID, 215 ("Invalid BGX ID: %d, max: %d", bgx->bgx_id, BGX_MAXID)); 216 217 len = sizeof(BGX_NODE_NAME) + 1; /* <bgx_name>+<digit>+<\0> */ 218 /* Allocate memory for BGX node name + "/" character */ 219 bgx_sel = malloc(sizeof(*bgx_sel) * (len + 1), M_BGX, 220 M_ZERO | M_WAITOK); 221 222 /* Prepare node's name */ 223 snprintf(bgx_sel, len + 1, "/"BGX_NODE_NAME"%d", bgx->bgx_id); 224 /* First try the root node */ 225 node = OF_finddevice(bgx_sel); 226 if ((int)node > 0) { 227 /* Found relevant node */ 228 goto out; 229 } 230 /* 231 * Clean-up and try to find BGX in DT 232 * starting from the parent PCI bridge node. 233 */ 234 memset(bgx_sel, 0, sizeof(*bgx_sel) * (len + 1)); 235 snprintf(bgx_sel, len, BGX_NODE_NAME"%d", bgx->bgx_id); 236 237 /* Find PCI bridge that we are connected to */ 238 239 root_pcib = bgx_find_root_pcib(bgx->dev); 240 if (root_pcib == NULL) { 241 device_printf(bgx->dev, "Unable to find BGX root bridge\n"); 242 node = 0; 243 goto out; 244 } 245 246 node = ofw_bus_get_node(root_pcib); 247 if ((int)node <= 0) { 248 device_printf(bgx->dev, "No parent FDT node for BGX\n"); 249 goto out; 250 } 251 252 node = bgx_fdt_traverse_nodes(node, bgx_sel, len); 253out: 254 free(bgx_sel, M_BGX); 255 return (node); 256} 257 258int 259bgx_fdt_init_phy(struct bgx *bgx) 260{ 261 phandle_t node, child; 262 phandle_t phy, mdio; 263 uint8_t lmac; 264 char qlm_mode[CONN_TYPE_MAXLEN]; 265 266 node = bgx_fdt_find_node(bgx); 267 if (node == 0) { 268 device_printf(bgx->dev, 269 "Could not find bgx%d node in FDT\n", bgx->bgx_id); 270 return (ENXIO); 271 } 272 273 lmac = 0; 274 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 275 if (OF_getprop(child, "qlm-mode", qlm_mode, 276 sizeof(qlm_mode)) <= 0) { 277 /* Missing qlm-mode, skipping */ 278 continue; 279 } 280 281 if (!bgx_fdt_phy_mode_match(bgx, qlm_mode, sizeof(qlm_mode))) { 282 /* 283 * Connection type not match with BGX mode. 284 */ 285 continue; 286 } 287 288 289 /* Acquire PHY address */ 290 if (OF_getencprop(child, "reg", &bgx->lmac[lmac].phyaddr, 291 sizeof(bgx->lmac[lmac].phyaddr)) <= 0) { 292 if (bootverbose) { 293 device_printf(bgx->dev, 294 "Could not retrieve PHY address\n"); 295 } 296 bgx->lmac[lmac].phyaddr = MII_PHY_ANY; 297 } 298 299 if (OF_getencprop(child, "phy-handle", &phy, 300 sizeof(phy)) <= 0) { 301 if (bootverbose) { 302 device_printf(bgx->dev, 303 "No phy-handle in PHY node. Skipping...\n"); 304 } 305 continue; 306 } 307 phy = OF_instance_to_package(phy); 308 /* 309 * Get PHY interface (MDIO bus) device. 310 * Driver must be already attached. 311 */ 312 mdio = OF_parent(phy); 313 bgx->lmac[lmac].phy_if_dev = 314 OF_device_from_xref(OF_xref_from_node(mdio)); 315 if (bgx->lmac[lmac].phy_if_dev == NULL) { 316 if (bootverbose) { 317 device_printf(bgx->dev, 318 "Could not find interface to PHY\n"); 319 } 320 continue; 321 } 322 323 /* Get mac address from FDT */ 324 bgx_fdt_get_macaddr(child, bgx->lmac[lmac].mac); 325 326 bgx->lmac[lmac].lmacid = lmac; 327 lmac++; 328 if (lmac == MAX_LMAC_PER_BGX) 329 break; 330 } 331 if (lmac == 0) { 332 device_printf(bgx->dev, "Could not find matching PHY\n"); 333 return (ENXIO); 334 } 335 336 return (0); 337} 338