792baee6b7
ofw_bus_get_node() must be tested against negative values since missing parent bus method will result in calling the default method which simply returns (-1): sys/dev/ofw/ofw_bus_if.m This was lost in the review process. Obtained from: Semihalf Sponsored by: Cavium
338 lines
8.5 KiB
C
338 lines
8.5 KiB
C
/*-
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* Copyright (c) 2015 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Semihalf under
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* the sponsorship of the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bitset.h>
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#include <sys/bitstring.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/pciio.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/socket.h>
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#include <sys/cpuset.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/mii/miivar.h>
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#include "thunder_bgx.h"
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#include "thunder_bgx_var.h"
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#define CONN_TYPE_MAXLEN 16
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#define CONN_TYPE_OFFSET 2
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#define BGX_NODE_NAME "bgx"
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#define BGX_MAXID 9
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#define FDT_NAME_MAXLEN 31
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int bgx_fdt_init_phy(struct bgx *);
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static void
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bgx_fdt_get_macaddr(phandle_t phy, uint8_t *hwaddr)
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{
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uint8_t addr[ETHER_ADDR_LEN];
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if (OF_getprop(phy, "local-mac-address", addr, ETHER_ADDR_LEN) == -1) {
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/* Missing MAC address should be marked by clearing it */
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memset(hwaddr, 0, ETHER_ADDR_LEN);
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} else
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memcpy(hwaddr, addr, ETHER_ADDR_LEN);
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}
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static boolean_t
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bgx_fdt_phy_mode_match(struct bgx *bgx, char *qlm_mode, size_t size)
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{
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size -= CONN_TYPE_OFFSET;
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switch (bgx->qlm_mode) {
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case QLM_MODE_SGMII:
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if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "sgmii", size) == 0)
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return (TRUE);
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break;
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case QLM_MODE_XAUI_1X4:
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if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xaui", size) == 0)
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return (TRUE);
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if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "dxaui", size) == 0)
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return (TRUE);
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break;
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case QLM_MODE_RXAUI_2X2:
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if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "raui", size) == 0)
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return (TRUE);
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break;
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case QLM_MODE_XFI_4X1:
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if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xfi", size) == 0)
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return (TRUE);
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break;
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case QLM_MODE_XLAUI_1X4:
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if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xlaui", size) == 0)
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return (TRUE);
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break;
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case QLM_MODE_10G_KR_4X1:
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if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xfi-10g-kr", size) == 0)
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return (TRUE);
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break;
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case QLM_MODE_40G_KR4_1X4:
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if (strncmp(&qlm_mode[CONN_TYPE_OFFSET], "xlaui-40g-kr", size) == 0)
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return (TRUE);
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break;
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default:
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return (FALSE);
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}
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return (FALSE);
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}
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static phandle_t
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bgx_fdt_traverse_nodes(phandle_t start, char *name, size_t len)
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{
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phandle_t node, ret;
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size_t buf_size;
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char *node_name;
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int err;
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buf_size = sizeof(*node_name) * FDT_NAME_MAXLEN;
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if (len > buf_size) {
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/*
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* This is an erroneous situation since the string
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* to compare cannot be longer than FDT_NAME_MAXLEN.
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*/
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return (0);
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}
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node_name = malloc(buf_size, M_BGX, M_WAITOK);
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for (node = OF_child(start); node != 0; node = OF_peer(node)) {
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/* Clean-up the buffer */
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memset(node_name, 0, buf_size);
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/* Recurse to children */
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if (OF_child(node) != 0) {
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ret = bgx_fdt_traverse_nodes(node, name, len);
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if (ret != 0) {
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free(node_name, M_BGX);
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return (ret);
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}
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}
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err = OF_getprop(node, "name", node_name, FDT_NAME_MAXLEN);
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if ((err > 0) && (strncmp(node_name, name, len) == 0)) {
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free(node_name, M_BGX);
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return (node);
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}
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}
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free(node_name, M_BGX);
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return (0);
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}
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/*
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* Similar functionality to pci_find_pcie_root_port()
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* but this one works for ThunderX.
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*/
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static device_t
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bgx_find_root_pcib(device_t dev)
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{
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devclass_t pci_class;
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device_t pcib, bus;
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pci_class = devclass_find("pci");
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KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class,
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("%s: non-pci device %s", __func__, device_get_nameunit(dev)));
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/* Walk the bridge hierarchy until we find a non-PCI device */
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for (;;) {
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bus = device_get_parent(dev);
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KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
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device_get_nameunit(dev)));
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if (device_get_devclass(bus) != pci_class)
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return (NULL);
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pcib = device_get_parent(bus);
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KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
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device_get_nameunit(bus)));
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/*
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* If the parent of this PCIB is not PCI
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* then we found our root PCIB.
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*/
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if (device_get_devclass(device_get_parent(pcib)) != pci_class)
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return (pcib);
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dev = pcib;
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}
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}
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static __inline phandle_t
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bgx_fdt_find_node(struct bgx *bgx)
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{
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device_t root_pcib;
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phandle_t node;
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char *bgx_sel;
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size_t len;
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KASSERT(bgx->bgx_id <= BGX_MAXID,
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("Invalid BGX ID: %d, max: %d", bgx->bgx_id, BGX_MAXID));
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len = sizeof(BGX_NODE_NAME) + 1; /* <bgx_name>+<digit>+<\0> */
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/* Allocate memory for BGX node name + "/" character */
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bgx_sel = malloc(sizeof(*bgx_sel) * (len + 1), M_BGX,
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M_ZERO | M_WAITOK);
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/* Prepare node's name */
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snprintf(bgx_sel, len + 1, "/"BGX_NODE_NAME"%d", bgx->bgx_id);
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/* First try the root node */
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node = OF_finddevice(bgx_sel);
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if ((int)node > 0) {
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/* Found relevant node */
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goto out;
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}
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/*
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* Clean-up and try to find BGX in DT
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* starting from the parent PCI bridge node.
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*/
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memset(bgx_sel, 0, sizeof(*bgx_sel) * (len + 1));
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snprintf(bgx_sel, len, BGX_NODE_NAME"%d", bgx->bgx_id);
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/* Find PCI bridge that we are connected to */
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root_pcib = bgx_find_root_pcib(bgx->dev);
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if (root_pcib == NULL) {
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device_printf(bgx->dev, "Unable to find BGX root bridge\n");
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node = 0;
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goto out;
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}
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node = ofw_bus_get_node(root_pcib);
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if ((int)node <= 0) {
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device_printf(bgx->dev, "No parent FDT node for BGX\n");
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goto out;
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}
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node = bgx_fdt_traverse_nodes(node, bgx_sel, len);
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out:
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free(bgx_sel, M_BGX);
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return (node);
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}
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int
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bgx_fdt_init_phy(struct bgx *bgx)
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{
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phandle_t node, child;
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phandle_t phy, mdio;
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uint8_t lmac;
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char qlm_mode[CONN_TYPE_MAXLEN];
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node = bgx_fdt_find_node(bgx);
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if (node == 0) {
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device_printf(bgx->dev,
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"Could not find bgx%d node in FDT\n", bgx->bgx_id);
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return (ENXIO);
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}
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lmac = 0;
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for (child = OF_child(node); child > 0; child = OF_peer(child)) {
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if (OF_getprop(child, "qlm-mode", qlm_mode,
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sizeof(qlm_mode)) <= 0) {
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/* Missing qlm-mode, skipping */
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continue;
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}
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if (!bgx_fdt_phy_mode_match(bgx, qlm_mode, sizeof(qlm_mode))) {
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/*
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* Connection type not match with BGX mode.
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*/
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continue;
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}
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if (OF_getencprop(child, "phy-handle", &phy,
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sizeof(phy)) <= 0) {
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if (bootverbose) {
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device_printf(bgx->dev,
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"No phy-handle in PHY node. Skipping...\n");
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}
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continue;
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}
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/* Acquire PHY address */
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phy = OF_node_from_xref(phy);
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if (OF_getencprop(phy, "reg", &bgx->lmac[lmac].phyaddr,
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sizeof(bgx->lmac[lmac].phyaddr)) <= 0) {
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if (bootverbose) {
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device_printf(bgx->dev,
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"Could not retrieve PHY address\n");
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}
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bgx->lmac[lmac].phyaddr = MII_PHY_ANY;
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}
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/*
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* Get PHY interface (MDIO bus) device.
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* Driver must be already attached.
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*/
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mdio = OF_parent(phy);
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bgx->lmac[lmac].phy_if_dev =
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OF_device_from_xref(OF_xref_from_node(mdio));
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if (bgx->lmac[lmac].phy_if_dev == NULL) {
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if (bootverbose) {
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device_printf(bgx->dev,
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"Could not find interface to PHY\n");
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}
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continue;
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}
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/* Get mac address from FDT */
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bgx_fdt_get_macaddr(phy, bgx->lmac[lmac].mac);
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bgx->lmac[lmac].lmacid = lmac;
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lmac++;
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if (lmac == MAX_LMAC_PER_BGX)
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break;
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}
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if (lmac == 0) {
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device_printf(bgx->dev, "Could not find matching PHY\n");
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return (ENXIO);
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}
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return (0);
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}
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