freebsd-nq/sys/dev/vnic/thunder_bgx_fdt.c

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/*-
* Copyright (c) 2015 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Semihalf under
* the sponsorship of the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bitset.h>
#include <sys/bitstring.h>
#include <sys/bus.h>
#include <sys/ctype.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/pciio.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/cpuset.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_media.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/mii/miivar.h>
#include "thunder_bgx.h"
#include "thunder_bgx_var.h"
#define CONN_TYPE_MAXLEN 16
#define CONN_TYPE_OFFSET 2
#define BGX_NODE_NAME "bgx"
#define BGX_MAXID 9
/* BGX func. 0, i.e.: reg = <0x8000 0 0 0 0>; DEVFN = 0x80 */
#define BGX_DEVFN_0 0x80
#define FDT_NAME_MAXLEN 31
int bgx_fdt_init_phy(struct bgx *);
static void
bgx_fdt_get_macaddr(phandle_t phy, uint8_t *hwaddr)
{
uint8_t addr[ETHER_ADDR_LEN];
if (OF_getprop(phy, "local-mac-address", addr, ETHER_ADDR_LEN) == -1) {
/* Missing MAC address should be marked by clearing it */
memset(hwaddr, 0, ETHER_ADDR_LEN);
} else
memcpy(hwaddr, addr, ETHER_ADDR_LEN);
}
static boolean_t
bgx_fdt_phy_mode_match(struct bgx *bgx, char *qlm_mode, ssize_t size)
{
const char *type;
ssize_t sz;
ssize_t offset;
switch (bgx->qlm_mode) {
case QLM_MODE_SGMII:
type = "sgmii";
sz = sizeof("sgmii");
offset = size - sz;
break;
case QLM_MODE_XAUI_1X4:
type = "xaui";
sz = sizeof("xaui");
offset = size - sz;
if (offset < 0)
return (FALSE);
if (strncmp(&qlm_mode[offset], type, sz) == 0)
return (TRUE);
type = "dxaui";
sz = sizeof("dxaui");
offset = size - sz;
break;
case QLM_MODE_RXAUI_2X2:
type = "raui";
sz = sizeof("raui");
offset = size - sz;
break;
case QLM_MODE_XFI_4X1:
type = "xfi";
sz = sizeof("xfi");
offset = size - sz;
break;
case QLM_MODE_XLAUI_1X4:
type = "xlaui";
sz = sizeof("xlaui");
offset = size - sz;
break;
case QLM_MODE_10G_KR_4X1:
type = "xfi-10g-kr";
sz = sizeof("xfi-10g-kr");
offset = size - sz;
break;
case QLM_MODE_40G_KR4_1X4:
type = "xlaui-40g-kr";
sz = sizeof("xlaui-40g-kr");
offset = size - sz;
break;
default:
return (FALSE);
}
if (offset < 0)
return (FALSE);
if (strncmp(&qlm_mode[offset], type, sz) == 0)
return (TRUE);
return (FALSE);
}
static boolean_t
bgx_fdt_phy_name_match(struct bgx *bgx, char *phy_name, ssize_t size)
{
const char *type;
ssize_t sz;
char last;
switch (bgx->qlm_mode) {
case QLM_MODE_SGMII:
type = "sgmii";
sz = sizeof("sgmii");
break;
case QLM_MODE_XAUI_1X4:
type = "xaui";
sz = sizeof("xaui");
if (sz < size)
return (FALSE);
if (strncmp(phy_name, type, sz) == 0)
return (TRUE);
type = "dxaui";
sz = sizeof("dxaui");
break;
case QLM_MODE_RXAUI_2X2:
type = "raui";
sz = sizeof("raui");
break;
case QLM_MODE_XFI_4X1:
type = "xfi";
sz = sizeof("xfi");
break;
case QLM_MODE_XLAUI_1X4:
type = "xlaui";
sz = sizeof("xlaui");
break;
case QLM_MODE_10G_KR_4X1:
type = "xfi-10g-kr";
sz = sizeof("xfi-10g-kr");
break;
case QLM_MODE_40G_KR4_1X4:
type = "xlaui-40g-kr";
sz = sizeof("xlaui-40g-kr");
break;
default:
return (FALSE);
}
if (sz > size)
return (FALSE);
if (strncmp(phy_name, type, sz - 1) == 0) {
last = phy_name[sz - 1];
if (last == '\0' || last == '@' || isdigit(last))
return (TRUE);
}
return (FALSE);
}
static phandle_t
bgx_fdt_traverse_nodes(uint8_t unit, phandle_t start, char *name,
size_t len)
{
phandle_t node, ret;
uint32_t *reg;
size_t buf_size;
ssize_t proplen;
char *node_name;
int err;
/*
* Traverse all subordinate nodes of 'start' to find BGX instance.
* This supports both old (by name) and new (by reg) methods.
*/
buf_size = sizeof(*node_name) * FDT_NAME_MAXLEN;
if (len > buf_size) {
/*
* This is an erroneous situation since the string
* to compare cannot be longer than FDT_NAME_MAXLEN.
*/
return (0);
}
node_name = malloc(buf_size, M_BGX, M_WAITOK);
for (node = OF_child(start); node != 0; node = OF_peer(node)) {
/* Clean-up the buffer */
memset(node_name, 0, buf_size);
/* Recurse to children */
if (OF_child(node) != 0) {
ret = bgx_fdt_traverse_nodes(unit, node, name, len);
if (ret != 0) {
free(node_name, M_BGX);
return (ret);
}
}
/*
* Old way - by name
*/
proplen = OF_getproplen(node, "name");
if ((proplen <= 0) || (proplen < len))
continue;
err = OF_getprop(node, "name", node_name, proplen);
if (err <= 0)
continue;
if (strncmp(node_name, name, len) == 0) {
free(node_name, M_BGX);
return (node);
}
/*
* New way - by reg
*/
/* Check if even BGX */
if (strncmp(node_name,
BGX_NODE_NAME, sizeof(BGX_NODE_NAME) - 1) != 0)
continue;
/* Get reg */
err = OF_getencprop_alloc_multi(node, "reg", sizeof(*reg),
(void **)&reg);
if (err == -1) {
free(reg, M_OFWPROP);
continue;
}
/* Match BGX device function */
if ((BGX_DEVFN_0 + unit) == (reg[0] >> 8)) {
free(reg, M_OFWPROP);
free(node_name, M_BGX);
return (node);
}
free(reg, M_OFWPROP);
}
free(node_name, M_BGX);
return (0);
}
/*
* Similar functionality to pci_find_pcie_root_port()
* but this one works for ThunderX.
*/
static device_t
bgx_find_root_pcib(device_t dev)
{
devclass_t pci_class;
device_t pcib, bus;
pci_class = devclass_find("pci");
KASSERT(device_get_devclass(device_get_parent(dev)) == pci_class,
("%s: non-pci device %s", __func__, device_get_nameunit(dev)));
/* Walk the bridge hierarchy until we find a non-PCI device */
for (;;) {
bus = device_get_parent(dev);
KASSERT(bus != NULL, ("%s: null parent of %s", __func__,
device_get_nameunit(dev)));
if (device_get_devclass(bus) != pci_class)
return (NULL);
pcib = device_get_parent(bus);
KASSERT(pcib != NULL, ("%s: null bridge of %s", __func__,
device_get_nameunit(bus)));
/*
* If the parent of this PCIB is not PCI
* then we found our root PCIB.
*/
if (device_get_devclass(device_get_parent(pcib)) != pci_class)
return (pcib);
dev = pcib;
}
}
static __inline phandle_t
bgx_fdt_find_node(struct bgx *bgx)
{
device_t root_pcib;
phandle_t node;
char *bgx_sel;
size_t len;
KASSERT(bgx->bgx_id <= BGX_MAXID,
("Invalid BGX ID: %d, max: %d", bgx->bgx_id, BGX_MAXID));
len = sizeof(BGX_NODE_NAME) + 1; /* <bgx_name>+<digit>+<\0> */
/* Allocate memory for BGX node name + "/" character */
bgx_sel = malloc(sizeof(*bgx_sel) * (len + 1), M_BGX,
M_ZERO | M_WAITOK);
/* Prepare node's name */
snprintf(bgx_sel, len + 1, "/"BGX_NODE_NAME"%d", bgx->bgx_id);
/* First try the root node */
node = OF_finddevice(bgx_sel);
if (node != -1) {
/* Found relevant node */
goto out;
}
/*
* Clean-up and try to find BGX in DT
* starting from the parent PCI bridge node.
*/
memset(bgx_sel, 0, sizeof(*bgx_sel) * (len + 1));
snprintf(bgx_sel, len, BGX_NODE_NAME"%d", bgx->bgx_id);
/* Find PCI bridge that we are connected to */
root_pcib = bgx_find_root_pcib(bgx->dev);
if (root_pcib == NULL) {
device_printf(bgx->dev, "Unable to find BGX root bridge\n");
node = 0;
goto out;
}
node = ofw_bus_get_node(root_pcib);
if ((int)node <= 0) {
device_printf(bgx->dev, "No parent FDT node for BGX\n");
goto out;
}
node = bgx_fdt_traverse_nodes(bgx->bgx_id, node, bgx_sel, len);
out:
free(bgx_sel, M_BGX);
return (node);
}
int
bgx_fdt_init_phy(struct bgx *bgx)
{
char *node_name;
phandle_t node, child;
phandle_t phy, mdio;
ssize_t len;
uint8_t lmac;
char qlm_mode[CONN_TYPE_MAXLEN];
node = bgx_fdt_find_node(bgx);
if (node == 0) {
device_printf(bgx->dev,
"Could not find bgx%d node in FDT\n", bgx->bgx_id);
return (ENXIO);
}
lmac = 0;
for (child = OF_child(node); child > 0; child = OF_peer(child)) {
len = OF_getprop(child, "qlm-mode", qlm_mode, sizeof(qlm_mode));
if (len > 0) {
if (!bgx_fdt_phy_mode_match(bgx, qlm_mode, len)) {
/*
* Connection type not match with BGX mode.
*/
continue;
}
} else {
len = OF_getprop_alloc(child, "name",
(void **)&node_name);
if (len <= 0) {
continue;
}
if (!bgx_fdt_phy_name_match(bgx, node_name, len)) {
free(node_name, M_OFWPROP);
continue;
}
free(node_name, M_OFWPROP);
}
/* Acquire PHY address */
if (OF_getencprop(child, "reg", &bgx->lmac[lmac].phyaddr,
sizeof(bgx->lmac[lmac].phyaddr)) <= 0) {
if (bootverbose) {
device_printf(bgx->dev,
"Could not retrieve PHY address\n");
}
bgx->lmac[lmac].phyaddr = MII_PHY_ANY;
}
if (OF_getencprop(child, "phy-handle", &phy,
sizeof(phy)) <= 0) {
if (bootverbose) {
device_printf(bgx->dev,
"No phy-handle in PHY node. Skipping...\n");
}
continue;
}
phy = OF_instance_to_package(phy);
/*
* Get PHY interface (MDIO bus) device.
* Driver must be already attached.
*/
mdio = OF_parent(phy);
bgx->lmac[lmac].phy_if_dev =
OF_device_from_xref(OF_xref_from_node(mdio));
if (bgx->lmac[lmac].phy_if_dev == NULL) {
if (bootverbose) {
device_printf(bgx->dev,
"Could not find interface to PHY\n");
}
continue;
}
/* Get mac address from FDT */
bgx_fdt_get_macaddr(child, bgx->lmac[lmac].mac);
bgx->lmac[lmac].lmacid = lmac;
lmac++;
if (lmac == MAX_LMAC_PER_BGX)
break;
}
if (lmac == 0) {
device_printf(bgx->dev, "Could not find matching PHY\n");
return (ENXIO);
}
return (0);
}