2 * Copyright (c) 2015 The FreeBSD Foundation
5 * This software was developed by Semihalf under
6 * the sponsorship of the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/bitset.h>
36 #include <sys/bitstring.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>
44 #include <sys/pciio.h>
47 #include <sys/socket.h>
48 #include <sys/cpuset.h>
50 #include <sys/mutex.h>
52 #include <net/ethernet.h>
54 #include <net/if_media.h>
56 #include <dev/ofw/openfirm.h>
57 #include <dev/ofw/ofw_bus.h>
58 #include <dev/mii/miivar.h>
60 #include "thunder_bgx.h"
61 #include "thunder_bgx_var.h"
63 #define CONN_TYPE_MAXLEN 16
64 #define CONN_TYPE_OFFSET 2
66 #define BGX_NODE_NAME "bgx"
68 /* BGX func. 0, i.e.: reg = <0x8000 0 0 0 0>; DEVFN = 0x80 */
69 #define BGX_DEVFN_0 0x80
71 #define FDT_NAME_MAXLEN 31
73 int bgx_fdt_init_phy(struct bgx *);
76 bgx_fdt_get_macaddr(phandle_t phy, uint8_t *hwaddr)
78 uint8_t addr[ETHER_ADDR_LEN];
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);
84 memcpy(hwaddr, addr, ETHER_ADDR_LEN);
88 bgx_fdt_phy_mode_match(struct bgx *bgx, char *qlm_mode, ssize_t size)
94 switch (bgx->qlm_mode) {
100 case QLM_MODE_XAUI_1X4:
106 if (strncmp(&qlm_mode[offset], type, sz) == 0)
109 sz = sizeof("dxaui");
112 case QLM_MODE_RXAUI_2X2:
117 case QLM_MODE_XFI_4X1:
122 case QLM_MODE_XLAUI_1X4:
124 sz = sizeof("xlaui");
127 case QLM_MODE_10G_KR_4X1:
129 sz = sizeof("xfi-10g-kr");
132 case QLM_MODE_40G_KR4_1X4:
133 type = "xlaui-40g-kr";
134 sz = sizeof("xlaui-40g-kr");
144 if (strncmp(&qlm_mode[offset], type, sz) == 0)
151 bgx_fdt_phy_name_match(struct bgx *bgx, char *phy_name, ssize_t size)
157 switch (bgx->qlm_mode) {
160 sz = sizeof("sgmii");
162 case QLM_MODE_XAUI_1X4:
167 if (strncmp(phy_name, type, sz) == 0)
170 sz = sizeof("dxaui");
172 case QLM_MODE_RXAUI_2X2:
176 case QLM_MODE_XFI_4X1:
180 case QLM_MODE_XLAUI_1X4:
182 sz = sizeof("xlaui");
184 case QLM_MODE_10G_KR_4X1:
186 sz = sizeof("xfi-10g-kr");
188 case QLM_MODE_40G_KR4_1X4:
189 type = "xlaui-40g-kr";
190 sz = sizeof("xlaui-40g-kr");
198 if (strncmp(phy_name, type, sz - 1) == 0) {
199 last = phy_name[sz - 1];
200 if (last == '\0' || last == '@' || isdigit(last))
207 bgx_fdt_traverse_nodes(uint8_t unit, phandle_t start, char *name,
218 * Traverse all subordinate nodes of 'start' to find BGX instance.
219 * This supports both old (by name) and new (by reg) methods.
221 buf_size = sizeof(*node_name) * FDT_NAME_MAXLEN;
222 if (len > buf_size) {
224 * This is an erroneous situation since the string
225 * to compare cannot be longer than FDT_NAME_MAXLEN.
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);
238 free(node_name, M_BGX);
245 proplen = OF_getproplen(node, "name");
246 if ((proplen <= 0) || (proplen < len))
249 err = OF_getprop(node, "name", node_name, proplen);
253 if (strncmp(node_name, name, len) == 0) {
254 free(node_name, M_BGX);
260 /* Check if even BGX */
261 if (strncmp(node_name,
262 BGX_NODE_NAME, sizeof(BGX_NODE_NAME) - 1) != 0)
265 err = OF_getencprop_alloc_multi(node, "reg", sizeof(*reg),
268 free(reg, M_OFWPROP);
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);
278 free(reg, M_OFWPROP);
280 free(node_name, M_BGX);
286 * Similar functionality to pci_find_pcie_root_port()
287 * but this one works for ThunderX.
290 bgx_find_root_pcib(device_t dev)
292 devclass_t pci_class;
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)));
299 /* Walk the bridge hierarchy until we find a non-PCI device */
301 bus = device_get_parent(dev);
302 KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
303 device_get_nameunit(dev)));
305 if (device_get_devclass(bus) != pci_class)
308 pcib = device_get_parent(bus);
309 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
310 device_get_nameunit(bus)));
313 * If the parent of this PCIB is not PCI
314 * then we found our root PCIB.
316 if (device_get_devclass(device_get_parent(pcib)) != pci_class)
323 static __inline phandle_t
324 bgx_fdt_find_node(struct bgx *bgx)
331 KASSERT(bgx->bgx_id <= BGX_MAXID,
332 ("Invalid BGX ID: %d, max: %d", bgx->bgx_id, BGX_MAXID));
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,
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);
344 /* Found relevant node */
348 * Clean-up and try to find BGX in DT
349 * starting from the parent PCI bridge node.
351 memset(bgx_sel, 0, sizeof(*bgx_sel) * (len + 1));
352 snprintf(bgx_sel, len, BGX_NODE_NAME"%d", bgx->bgx_id);
354 /* Find PCI bridge that we are connected to */
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");
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");
369 node = bgx_fdt_traverse_nodes(bgx->bgx_id, node, bgx_sel, len);
371 free(bgx_sel, M_BGX);
376 bgx_fdt_init_phy(struct bgx *bgx)
379 phandle_t node, child;
383 char qlm_mode[CONN_TYPE_MAXLEN];
385 node = bgx_fdt_find_node(bgx);
387 device_printf(bgx->dev,
388 "Could not find bgx%d node in FDT\n", bgx->bgx_id);
393 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
394 len = OF_getprop(child, "qlm-mode", qlm_mode, sizeof(qlm_mode));
396 if (!bgx_fdt_phy_mode_match(bgx, qlm_mode, len)) {
398 * Connection type not match with BGX mode.
403 len = OF_getprop_alloc(child, "name",
404 (void **)&node_name);
409 if (!bgx_fdt_phy_name_match(bgx, node_name, len)) {
410 free(node_name, M_OFWPROP);
413 free(node_name, M_OFWPROP);
416 /* Acquire PHY address */
417 if (OF_getencprop(child, "reg", &bgx->lmac[lmac].phyaddr,
418 sizeof(bgx->lmac[lmac].phyaddr)) <= 0) {
420 device_printf(bgx->dev,
421 "Could not retrieve PHY address\n");
423 bgx->lmac[lmac].phyaddr = MII_PHY_ANY;
426 if (OF_getencprop(child, "phy-handle", &phy,
429 device_printf(bgx->dev,
430 "No phy-handle in PHY node. Skipping...\n");
434 phy = OF_instance_to_package(phy);
436 * Get PHY interface (MDIO bus) device.
437 * Driver must be already attached.
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) {
444 device_printf(bgx->dev,
445 "Could not find interface to PHY\n");
450 /* Get mac address from FDT */
451 bgx_fdt_get_macaddr(child, bgx->lmac[lmac].mac);
453 bgx->lmac[lmac].lmacid = lmac;
455 if (lmac == MAX_LMAC_PER_BGX)
459 device_printf(bgx->dev, "Could not find matching PHY\n");