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/endian.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/module.h>
43 #include <sys/pciio.h>
46 #include <sys/socket.h>
47 #include <sys/cpuset.h>
49 #include <sys/mutex.h>
51 #include <net/ethernet.h>
53 #include <net/if_media.h>
55 #include <dev/ofw/openfirm.h>
56 #include <dev/ofw/ofw_bus.h>
57 #include <dev/mii/miivar.h>
59 #include "thunder_bgx.h"
60 #include "thunder_bgx_var.h"
62 #define CONN_TYPE_MAXLEN 16
63 #define CONN_TYPE_OFFSET 2
65 #define BGX_NODE_NAME "bgx"
67 /* BGX func. 0, i.e.: reg = <0x8000 0 0 0 0>; DEVFN = 0x80 */
68 #define BGX_DEVFN_0 0x80
70 #define FDT_NAME_MAXLEN 31
72 int bgx_fdt_init_phy(struct bgx *);
75 bgx_fdt_get_macaddr(phandle_t phy, uint8_t *hwaddr)
77 uint8_t addr[ETHER_ADDR_LEN];
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);
83 memcpy(hwaddr, addr, ETHER_ADDR_LEN);
87 bgx_fdt_phy_mode_match(struct bgx *bgx, char *qlm_mode, ssize_t size)
93 switch (bgx->qlm_mode) {
99 case QLM_MODE_XAUI_1X4:
105 if (strncmp(&qlm_mode[offset], type, sz) == 0)
108 sz = sizeof("dxaui");
111 case QLM_MODE_RXAUI_2X2:
116 case QLM_MODE_XFI_4X1:
121 case QLM_MODE_XLAUI_1X4:
123 sz = sizeof("xlaui");
126 case QLM_MODE_10G_KR_4X1:
128 sz = sizeof("xfi-10g-kr");
131 case QLM_MODE_40G_KR4_1X4:
132 type = "xlaui-40g-kr";
133 sz = sizeof("xlaui-40g-kr");
143 if (strncmp(&qlm_mode[offset], type, sz) == 0)
150 bgx_fdt_phy_name_match(struct bgx *bgx, char *phy_name, ssize_t size)
155 switch (bgx->qlm_mode) {
158 sz = sizeof("sgmii");
160 case QLM_MODE_XAUI_1X4:
165 if (strncmp(phy_name, type, sz) == 0)
168 sz = sizeof("dxaui");
170 case QLM_MODE_RXAUI_2X2:
174 case QLM_MODE_XFI_4X1:
178 case QLM_MODE_XLAUI_1X4:
180 sz = sizeof("xlaui");
182 case QLM_MODE_10G_KR_4X1:
184 sz = sizeof("xfi-10g-kr");
186 case QLM_MODE_40G_KR4_1X4:
187 type = "xlaui-40g-kr";
188 sz = sizeof("xlaui-40g-kr");
196 if (strncmp(phy_name, type, sz - 1) == 0 &&
197 (phy_name[sz - 1] == '\0' || phy_name[sz - 1] == '@'))
204 bgx_fdt_traverse_nodes(uint8_t unit, phandle_t start, char *name,
215 * Traverse all subordinate nodes of 'start' to find BGX instance.
216 * This supports both old (by name) and new (by reg) methods.
218 buf_size = sizeof(*node_name) * FDT_NAME_MAXLEN;
219 if (len > buf_size) {
221 * This is an erroneous situation since the string
222 * to compare cannot be longer than FDT_NAME_MAXLEN.
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);
235 free(node_name, M_BGX);
242 proplen = OF_getproplen(node, "name");
243 if ((proplen <= 0) || (proplen < len))
246 err = OF_getprop(node, "name", node_name, proplen);
250 if (strncmp(node_name, name, len) == 0) {
251 free(node_name, M_BGX);
257 /* Check if even BGX */
258 if (strncmp(node_name,
259 BGX_NODE_NAME, sizeof(BGX_NODE_NAME) - 1) != 0)
262 err = OF_getencprop_alloc_multi(node, "reg", sizeof(*reg),
265 free(reg, M_OFWPROP);
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);
275 free(reg, M_OFWPROP);
277 free(node_name, M_BGX);
283 * Similar functionality to pci_find_pcie_root_port()
284 * but this one works for ThunderX.
287 bgx_find_root_pcib(device_t dev)
289 devclass_t pci_class;
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)));
296 /* Walk the bridge hierarchy until we find a non-PCI device */
298 bus = device_get_parent(dev);
299 KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
300 device_get_nameunit(dev)));
302 if (device_get_devclass(bus) != pci_class)
305 pcib = device_get_parent(bus);
306 KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
307 device_get_nameunit(bus)));
310 * If the parent of this PCIB is not PCI
311 * then we found our root PCIB.
313 if (device_get_devclass(device_get_parent(pcib)) != pci_class)
320 static __inline phandle_t
321 bgx_fdt_find_node(struct bgx *bgx)
328 KASSERT(bgx->bgx_id <= BGX_MAXID,
329 ("Invalid BGX ID: %d, max: %d", bgx->bgx_id, BGX_MAXID));
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,
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);
341 /* Found relevant node */
345 * Clean-up and try to find BGX in DT
346 * starting from the parent PCI bridge node.
348 memset(bgx_sel, 0, sizeof(*bgx_sel) * (len + 1));
349 snprintf(bgx_sel, len, BGX_NODE_NAME"%d", bgx->bgx_id);
351 /* Find PCI bridge that we are connected to */
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");
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");
366 node = bgx_fdt_traverse_nodes(bgx->bgx_id, node, bgx_sel, len);
368 free(bgx_sel, M_BGX);
373 bgx_fdt_init_phy(struct bgx *bgx)
376 phandle_t node, child;
380 char qlm_mode[CONN_TYPE_MAXLEN];
382 node = bgx_fdt_find_node(bgx);
384 device_printf(bgx->dev,
385 "Could not find bgx%d node in FDT\n", bgx->bgx_id);
390 for (child = OF_child(node); child > 0; child = OF_peer(child)) {
391 len = OF_getprop(child, "qlm-mode", qlm_mode, sizeof(qlm_mode));
393 if (!bgx_fdt_phy_mode_match(bgx, qlm_mode, len)) {
395 * Connection type not match with BGX mode.
400 len = OF_getprop_alloc(child, "name",
401 (void **)&node_name);
406 if (!bgx_fdt_phy_name_match(bgx, node_name, len)) {
407 free(node_name, M_OFWPROP);
410 free(node_name, M_OFWPROP);
413 /* Acquire PHY address */
414 if (OF_getencprop(child, "reg", &bgx->lmac[lmac].phyaddr,
415 sizeof(bgx->lmac[lmac].phyaddr)) <= 0) {
417 device_printf(bgx->dev,
418 "Could not retrieve PHY address\n");
420 bgx->lmac[lmac].phyaddr = MII_PHY_ANY;
423 if (OF_getencprop(child, "phy-handle", &phy,
426 device_printf(bgx->dev,
427 "No phy-handle in PHY node. Skipping...\n");
431 phy = OF_instance_to_package(phy);
433 * Get PHY interface (MDIO bus) device.
434 * Driver must be already attached.
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) {
441 device_printf(bgx->dev,
442 "Could not find interface to PHY\n");
447 /* Get mac address from FDT */
448 bgx_fdt_get_macaddr(child, bgx->lmac[lmac].mac);
450 bgx->lmac[lmac].lmacid = lmac;
452 if (lmac == MAX_LMAC_PER_BGX)
456 device_printf(bgx->dev, "Could not find matching PHY\n");