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Differential D33294

LinuxKPI: Convert schedule() to inlined function
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Authored by wulf on Dec 6 2021, 10:02 AM.
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• hselasky
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rGd93c8a4d5a3f: LinuxKPI: Convert schedule() to inlined function
rG7ec6cbf1d2fd: LinuxKPI: Convert schedule() to inlined function
Summary

to prevent name clashing with drm-kmod

MFC after: 1 week

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rG FreeBSD src repository
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sys/
compat/
linuxkpi/
common/
include/
linux/
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sys/compat/linuxkpi/common/include/linux/sched.h

  • This file was added.
/*-
* Copyright (c) 2014 Alexander V. Chernikov. All rights reserved.
* Copyright (c) 2020, Ryan Moeller <freqlabs@FreeBSD.org>
*
* 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/sff8436.h>
#include <net/sff8472.h>
#include <math.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libifconfig.h>
#include <libifconfig_internal.h>
#include <libifconfig_sfp.h>
#include <libifconfig_sfp_tables_internal.h>
#define SFF_8636_EXT_COMPLIANCE 0x80
struct i2c_info {
struct ifreq ifr;
ifconfig_handle_t *h;
int error; /* Store first error */
bool qsfp; /* True if transceiver is QSFP */
};
melifaroUnsubmitted
Done
Inline Actions

This boilerplate seem also to be required only because of approach taken in .h

melifaro: This boilerplate seem also to be required only because of approach taken in .h
static uint8_t
find_zero_bit(const struct sfp_enum_metadata *table, int value, int sz)
{
int v, m;
for (v = 1, m = 1 << (8 * sz); v < m; v <<= 1) {
if ((value & v) == 0)
continue;
if (find_metadata(table, value & v) != NULL) {
return (value & v);
}
}
return (0);
}
/*
* Reads i2c data from opened kernel socket.
*/
static int
read_i2c(struct i2c_info *ii, uint8_t addr, uint8_t off, uint8_t len,
uint8_t *buf)
{
struct ifi2creq req;
int i, l;
if (ii->error != 0)
return (ii->error);
ii->ifr.ifr_data = (caddr_t)&req;
i = 0;
l = 0;
memset(&req, 0, sizeof(req));
req.dev_addr = addr;
req.offset = off;
req.len = len;
while (len > 0) {
l = MIN(sizeof(req.data), len);
req.len = l;
if (ifconfig_ioctlwrap(ii->h, AF_LOCAL, SIOCGI2C,
&ii->ifr) != 0) {
ii->error = errno;
return (errno);
}
memcpy(&buf[i], req.data, l);
len -= l;
i += l;
req.offset += l;
}
return (0);
}
static int
i2c_info_init(struct i2c_info *ii, ifconfig_handle_t *h, const char *name)
{
uint8_t id_byte;
memset(ii, 0, sizeof(*ii));
strlcpy(ii->ifr.ifr_name, name, sizeof(ii->ifr.ifr_name));
ii->h = h;
/*
* Try to read byte 0 from i2c:
* Both SFF-8472 and SFF-8436 use it as
* 'identification byte'.
* Stop reading status on zero as value -
* this might happen in case of empty transceiver slot.
*/
id_byte = 0;
read_i2c(ii, SFF_8472_BASE, SFF_8472_ID, 1, &id_byte);
if (ii->error != 0)
return (-1);
switch (id_byte) {
case 0:
h->error.errtype = OTHER;
h->error.errcode = ENOENT;
return (-1);
case SFF_8024_ID_QSFP:
case SFF_8024_ID_QSFPPLUS:
case SFF_8024_ID_QSFP28:
ii->qsfp = true;
default:
return (0);
}
}
static int
get_sfp_info(struct i2c_info *ii, struct ifconfig_sfp_info *sfp)
{
uint8_t code;
read_i2c(ii, SFF_8472_BASE, SFF_8472_ID, 1, &sfp->sfp_id);
read_i2c(ii, SFF_8472_BASE, SFF_8472_CONNECTOR, 1, &sfp->sfp_conn);
/* Use extended compliance code if it's valid */
read_i2c(ii, SFF_8472_BASE, SFF_8472_TRANS, 1, &sfp->sfp_eth_ext);
if (sfp->sfp_eth_ext == 0) {
/* Next, check 10G Ethernet/IB CCs */
read_i2c(ii, SFF_8472_BASE, SFF_8472_TRANS_START, 1, &code);
sfp->sfp_eth_10g = find_zero_bit(sfp_eth_10g_table, code, 1);
if (sfp->sfp_eth_10g == 0) {
/* No match. Try Ethernet 1G */
read_i2c(ii, SFF_8472_BASE, SFF_8472_TRANS_START + 3,
1, &code);
sfp->sfp_eth = find_zero_bit(sfp_eth_table, code, 1);
}
}
return (ii->error);
}
static int
get_qsfp_info(struct i2c_info *ii, struct ifconfig_sfp_info *sfp)
{
uint8_t code;
read_i2c(ii, SFF_8436_BASE, SFF_8436_ID, 1, &sfp->sfp_id);
read_i2c(ii, SFF_8436_BASE, SFF_8436_CONNECTOR, 1, &sfp->sfp_conn);
read_i2c(ii, SFF_8436_BASE, SFF_8436_STATUS, 1, &sfp->sfp_rev);
/* Check for extended specification compliance */
read_i2c(ii, SFF_8436_BASE, SFF_8436_CODE_E1040100G, 1, &code);
if (code & SFF_8636_EXT_COMPLIANCE) {
read_i2c(ii, SFF_8436_BASE, SFF_8436_OPTIONS_START, 1,
&sfp->sfp_eth_ext);
} else {
/* Check 10/40G Ethernet class only */
sfp->sfp_eth_1040g =
find_zero_bit(sfp_eth_1040g_table, code, 1);
}
return (ii->error);
}
int
ifconfig_sfp_get_sfp_info(ifconfig_handle_t *h,
const char *name, struct ifconfig_sfp_info *sfp)
{
struct i2c_info ii;
char buf[8];
memset(sfp, 0, sizeof(*sfp));
if (i2c_info_init(&ii, h, name) != 0)
return (-1);
/* Read bytes 3-10 at once */
read_i2c(&ii, SFF_8472_BASE, SFF_8472_TRANS_START, 8, buf);
if (ii.error != 0)
return (ii.error);
/* Check 10G ethernet first */
sfp->sfp_eth_10g = find_zero_bit(sfp_eth_10g_table, buf[0], 1);
if (sfp->sfp_eth_10g == 0) {
/* No match. Try 1G */
sfp->sfp_eth = find_zero_bit(sfp_eth_table, buf[3], 1);
}
sfp->sfp_fc_len = find_zero_bit(sfp_fc_len_table, buf[4], 1);
sfp->sfp_fc_media = find_zero_bit(sfp_fc_media_table, buf[6], 1);
sfp->sfp_fc_speed = find_zero_bit(sfp_fc_speed_table, buf[7], 1);
sfp->sfp_cab_tech =
find_zero_bit(sfp_cab_tech_table, (buf[4] << 8) | buf[5], 2);
if (ii.qsfp)
return (get_qsfp_info(&ii, sfp));
return (get_sfp_info(&ii, sfp));
}
/*
* Print SFF-8472/SFF-8436 string to supplied buffer.
* All (vendor-specific) strings are padded right with '0x20'.
*/
static void
get_sff_string(struct i2c_info *ii, uint8_t addr, uint8_t off, char *dst)
{
read_i2c(ii, addr, off, SFF_VENDOR_STRING_SIZE, dst);
dst += SFF_VENDOR_STRING_SIZE;
do { *dst-- = '\0'; } while (*dst == 0x20);
}
static void
get_sff_date(struct i2c_info *ii, uint8_t addr, uint8_t off, char *dst)
{
char buf[SFF_VENDOR_DATE_SIZE];
read_i2c(ii, addr, off, SFF_VENDOR_DATE_SIZE, buf);
sprintf(dst, "20%c%c-%c%c-%c%c", buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5]);
}
static int
get_sfp_vendor_info(struct i2c_info *ii, struct ifconfig_sfp_vendor_info *vi)
{
get_sff_string(ii, SFF_8472_BASE, SFF_8472_VENDOR_START, vi->name);
get_sff_string(ii, SFF_8472_BASE, SFF_8472_PN_START, vi->pn);
get_sff_string(ii, SFF_8472_BASE, SFF_8472_SN_START, vi->sn);
get_sff_date(ii, SFF_8472_BASE, SFF_8472_DATE_START, vi->date);
return (ii->error);
}
static int
get_qsfp_vendor_info(struct i2c_info *ii, struct ifconfig_sfp_vendor_info *vi)
{
get_sff_string(ii, SFF_8436_BASE, SFF_8436_VENDOR_START, vi->name);
get_sff_string(ii, SFF_8436_BASE, SFF_8436_PN_START, vi->pn);
get_sff_string(ii, SFF_8436_BASE, SFF_8436_SN_START, vi->sn);
get_sff_date(ii, SFF_8436_BASE, SFF_8436_DATE_START, vi->date);
return (ii->error);
}
int
ifconfig_sfp_get_sfp_vendor_info(ifconfig_handle_t *h,
const char *name, struct ifconfig_sfp_vendor_info *vi)
{
struct i2c_info ii;
memset(vi, 0, sizeof(*vi));
if (i2c_info_init(&ii, h, name) != 0)
return (-1);
if (ii.qsfp)
return (get_qsfp_vendor_info(&ii, vi));
return (get_sfp_vendor_info(&ii, vi));
}
/*
* Converts internal temperature (SFF-8472, SFF-8436)
* 16-bit unsigned value to human-readable representation:
*
* Internally measured Module temperature are represented
* as a 16-bit signed twos complement value in increments of
* 1/256 degrees Celsius, yielding a total range of –128C to +128C
* that is considered valid between –40 and +125C.
*/
static double
get_sff_temp(struct i2c_info *ii, uint8_t addr, uint8_t off)
{
double d;
uint8_t buf[2];
read_i2c(ii, addr, off, 2, buf);
d = (double)buf[0];
d += (double)buf[1] / 256;
return (d);
}
/*
* Retrieves supplied voltage (SFF-8472, SFF-8436).
* 16-bit usigned value, treated as range 0..+6.55 Volts
*/
static double
get_sff_voltage(struct i2c_info *ii, uint8_t addr, uint8_t off)
{
double d;
uint8_t buf[2];
read_i2c(ii, addr, off, 2, buf);
d = (double)((buf[0] << 8) | buf[1]);
return (d / 10000);
}
double
mW_to_dBm(uint16_t mW)
{
/*
* Assume internally-calibrated data.
* This is always true for SFF-8346, and explicitly
* checked for SFF-8472.
*/
return (10.0 * log10(1.0 * mW / 10000));
}
static uint16_t
get_sff_power(struct i2c_info *ii, uint8_t addr, uint8_t off)
{
uint8_t buf[2];
read_i2c(ii, addr, off, 2, buf);
if (ii->error != 0)
return (0);
return ((buf[0] << 8) + buf[1]);
}
static int
get_sfp_status(struct i2c_info *ii, struct ifconfig_sfp_status *ss)
{
uint8_t diag_type, flags;
/* Read diagnostic monitoring type */
read_i2c(ii, SFF_8472_BASE, SFF_8472_DIAG_TYPE, 1, (caddr_t)&diag_type);
if (ii->error != 0)
return (-1);
/*
* Read monitoring data IFF it is supplied AND is
* internally calibrated
*/
flags = SFF_8472_DDM_DONE | SFF_8472_DDM_INTERNAL;
if ((diag_type & flags) != flags) {
ii->h->error.errtype = OTHER;
ii->h->error.errcode = ENXIO;
return (-1);
}
ss->temp = get_sff_temp(ii, SFF_8472_DIAG, SFF_8472_TEMP);
ss->voltage = get_sff_voltage(ii, SFF_8472_DIAG, SFF_8472_VCC);
ss->power[0].rx = get_sff_power(ii, SFF_8472_DIAG, SFF_8472_RX_POWER);
ss->power[0].tx = get_sff_power(ii, SFF_8472_DIAG, SFF_8472_TX_POWER);
return (ii->error);
}
static uint32_t
get_qsfp_bitrate(struct i2c_info *ii)
{
uint8_t code;
uint32_t rate;
code = 0;
read_i2c(ii, SFF_8436_BASE, SFF_8436_BITRATE, 1, &code);
rate = code * 100;
if (code == 0xFF) {
read_i2c(ii, SFF_8436_BASE, SFF_8636_BITRATE, 1, &code);
rate = code * 250;
}
return (rate);
}
static int
get_qsfp_status(struct i2c_info *ii, struct ifconfig_sfp_status *ss)
{
ss->temp = get_sff_temp(ii, SFF_8436_BASE, SFF_8436_TEMP);
ss->voltage = get_sff_voltage(ii, SFF_8436_BASE, SFF_8436_VCC);
for (size_t chan = 0; chan < nitems(ss->power); ++chan) {
uint8_t rxoffs = SFF_8436_RX_CH1_MSB + chan * sizeof(uint16_t);
uint8_t txoffs = SFF_8436_TX_CH1_MSB + chan * sizeof(uint16_t);
ss->power[chan].rx = get_sff_power(ii, SFF_8436_BASE, rxoffs);
ss->power[chan].tx = get_sff_power(ii, SFF_8436_BASE, txoffs);
}
ss->bitrate = get_qsfp_bitrate(ii);
return (ii->error);
}
int
ifconfig_sfp_get_sfp_status(ifconfig_handle_t *h, const char *name,
struct ifconfig_sfp_status *ss)
{
struct i2c_info ii;
memset(ss, 0, sizeof(*ss));
if (i2c_info_init(&ii, h, name) != 0)
return (-1);
if (ii.qsfp)
return (get_qsfp_status(&ii, ss));
return (get_sfp_status(&ii, ss));
}
static const char *
sfp_id_string_alt(uint8_t value)
{
const char *id;
if (value <= SFF_8024_ID_LAST)
id = sff_8024_id[value];
else if (value > 0x80)
id = "Vendor specific";
else
id = "Reserved";
return (id);
}
static const char *
sfp_conn_string_alt(uint8_t value)
{
const char *conn;
if (value >= 0x0D && value <= 0x1F)
conn = "Unallocated";
else if (value >= 0x24 && value <= 0x7F)
conn = "Unallocated";
else
conn = "Vendor specific";
return (conn);
}
void
ifconfig_sfp_get_sfp_info_strings(struct ifconfig_sfp_info *sfp,
struct ifconfig_sfp_info_strings *strings)
{
get_sfp_info_strings(sfp, strings);
if (strings->sfp_id == NULL)
strings->sfp_id = sfp_id_string_alt(sfp->sfp_id);
if (strings->sfp_conn == NULL)
strings->sfp_conn = sfp_conn_string_alt(sfp->sfp_conn);
if (strings->sfp_rev == NULL)
strings->sfp_rev = "Unallocated";
}
int
ifconfig_sfp_get_sfp_dump(ifconfig_handle_t *h, const char *name,
struct ifconfig_sfp_dump *dump)
{
struct i2c_info ii;
uint8_t *buf = dump->data;
memset(dump->data, 0, sizeof(dump->data));
if (i2c_info_init(&ii, h, name) != 0)
return (-1);
if (ii.qsfp) {
dump->qsfp = true;
read_i2c(&ii, SFF_8436_BASE, QSFP_DUMP0_START, QSFP_DUMP0_SIZE,
buf);
read_i2c(&ii, SFF_8436_BASE, QSFP_DUMP1_START, QSFP_DUMP1_SIZE,
buf + QSFP_DUMP1_START);
} else {
read_i2c(&ii, SFF_8472_BASE, SFP_DUMP_START, SFP_DUMP_SIZE,
buf);
}
return (ii.error != 0 ? -1 : 0);
}
melifaroUnsubmitted
Done
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Can this be put in a separate file (if this code existence is really necessary) ?

melifaro: Can this be put in a separate file (if this code existence is really necessary) ?
freqlabsAuthorUnsubmitted
Done
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Sure, both of the macro sections could be hidden away in separate files. I can also add comments with instructions how to make changes. If not for shortcomings of the C preprocessor, most of the macro code here could be mechanically generated as well.

freqlabs: Sure, both of the macro sections could be hidden away in separate files. I can also add…