Release 4.11 drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp_eth.c
/*
* Copyright (C) 2015-2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/* Authors: David Brunecz <david.brunecz@netronome.com>
* Jakub Kicinski <jakub.kicinski@netronome.com>
* Jason Mcmullan <jason.mcmullan@netronome.com>
*/
#include <linux/bitfield.h>
#include <linux/ethtool.h>
#include <linux/if_ether.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include "nfp.h"
#include "nfp_nsp_eth.h"
#include "nfp6000/nfp6000.h"
#define NSP_ETH_NBI_PORT_COUNT 24
#define NSP_ETH_MAX_COUNT (2 * NSP_ETH_NBI_PORT_COUNT)
#define NSP_ETH_TABLE_SIZE (NSP_ETH_MAX_COUNT * \
sizeof(struct eth_table_entry))
#define NSP_ETH_PORT_LANES GENMASK_ULL(3, 0)
#define NSP_ETH_PORT_INDEX GENMASK_ULL(15, 8)
#define NSP_ETH_PORT_LABEL GENMASK_ULL(53, 48)
#define NSP_ETH_PORT_PHYLABEL GENMASK_ULL(59, 54)
#define NSP_ETH_PORT_LANES_MASK cpu_to_le64(NSP_ETH_PORT_LANES)
#define NSP_ETH_STATE_ENABLED BIT_ULL(1)
#define NSP_ETH_STATE_TX_ENABLED BIT_ULL(2)
#define NSP_ETH_STATE_RX_ENABLED BIT_ULL(3)
#define NSP_ETH_STATE_RATE GENMASK_ULL(11, 8)
#define NSP_ETH_CTRL_ENABLED BIT_ULL(1)
#define NSP_ETH_CTRL_TX_ENABLED BIT_ULL(2)
#define NSP_ETH_CTRL_RX_ENABLED BIT_ULL(3)
enum nfp_eth_rate {
RATE_INVALID = 0,
RATE_10M,
RATE_100M,
RATE_1G,
RATE_10G,
RATE_25G,
};
struct eth_table_entry {
__le64 port;
__le64 state;
u8 mac_addr[6];
u8 resv[2];
__le64 control;
};
static unsigned int nfp_eth_rate(enum nfp_eth_rate rate)
{
unsigned int rate_xlate[] = {
[RATE_INVALID] = 0,
[RATE_10M] = SPEED_10,
[RATE_100M] = SPEED_100,
[RATE_1G] = SPEED_1000,
[RATE_10G] = SPEED_10000,
[RATE_25G] = SPEED_25000,
};
if (rate >= ARRAY_SIZE(rate_xlate))
return 0;
return rate_xlate[rate];
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakub Kiciński | 72 | 100.00% | 1 | 100.00% |
| Total | 72 | 100.00% | 1 | 100.00% |
static void nfp_eth_copy_mac_reverse(u8 *dst, const u8 *src)
{
int i;
for (i = 0; i < ETH_ALEN; i++)
dst[ETH_ALEN - i - 1] = src[i];
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakub Kiciński | 45 | 100.00% | 1 | 100.00% |
| Total | 45 | 100.00% | 1 | 100.00% |
static void
nfp_eth_port_translate(const struct eth_table_entry *src, unsigned int index,
struct nfp_eth_table_port *dst)
{
unsigned int rate;
u64 port, state;
port = le64_to_cpu(src->port);
state = le64_to_cpu(src->state);
dst->eth_index = FIELD_GET(NSP_ETH_PORT_INDEX, port);
dst->index = index;
dst->nbi = index / NSP_ETH_NBI_PORT_COUNT;
dst->base = index % NSP_ETH_NBI_PORT_COUNT;
dst->lanes = FIELD_GET(NSP_ETH_PORT_LANES, port);
dst->enabled = FIELD_GET(NSP_ETH_STATE_ENABLED, state);
dst->tx_enabled = FIELD_GET(NSP_ETH_STATE_TX_ENABLED, state);
dst->rx_enabled = FIELD_GET(NSP_ETH_STATE_RX_ENABLED, state);
rate = nfp_eth_rate(FIELD_GET(NSP_ETH_STATE_RATE, state));
dst->speed = dst->lanes * rate;
nfp_eth_copy_mac_reverse(dst->mac_addr, src->mac_addr);
snprintf(dst->label, sizeof(dst->label) - 1, "%llu.%llu",
FIELD_GET(NSP_ETH_PORT_PHYLABEL, port),
FIELD_GET(NSP_ETH_PORT_LABEL, port));
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Jakub Kiciński | 190 | 100.00% | 1 | 100.00% |
| Total | 190 | 100.00% | 1 | 100.00% |
/**
* nfp_eth_read_ports() - retrieve port information
* @cpp: NFP CPP handle
*
* Read the port information from the device. Returned structure should
* be freed with kfree() once no longer needed.
*
* Return: populated ETH table or NULL on error.
*/
struct nfp_eth_table *nfp_eth_read_ports(struct nfp_cpp *cpp)
{
struct nfp_eth_table *ret;
struct nfp_nsp *nsp;
nsp = nfp_nsp_open(cpp);
if (IS_ERR(nsp))
return NULL;
ret = __nfp_eth_read_ports(cpp, nsp);
nfp_nsp_close(nsp);
return ret;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Jakub Kiciński | 56 | 100.00% | 1 | 100.00% |
| Total | 56 | 100.00% | 1 | 100.00% |
struct nfp_eth_table *
__nfp_eth_read_ports(struct nfp_cpp *cpp, struct nfp_nsp *nsp)
{
struct eth_table_entry *entries;
struct nfp_eth_table *table;
unsigned int cnt;
int i, j, ret;
entries = kzalloc(NSP_ETH_TABLE_SIZE, GFP_KERNEL);
if (!entries)
return NULL;
ret = nfp_nsp_read_eth_table(nsp, entries, NSP_ETH_TABLE_SIZE);
if (ret < 0) {
nfp_err(cpp, "reading port table failed %d\n", ret);
kfree(entries);
return NULL;
}
/* Some versions of flash will give us 0 instead of port count */
cnt = ret;
if (!cnt) {
for (i = 0; i < NSP_ETH_MAX_COUNT; i++)
if (entries[i].port & NSP_ETH_PORT_LANES_MASK)
cnt++;
}
table = kzalloc(sizeof(*table) +
sizeof(struct nfp_eth_table_port) * cnt, GFP_KERNEL);
if (!table) {
kfree(entries);
return NULL;
}
table->count = cnt;
for (i = 0, j = 0; i < NSP_ETH_MAX_COUNT; i++)
if (entries[i].port & NSP_ETH_PORT_LANES_MASK)
nfp_eth_port_translate(&entries[i], i,
&table->ports[j++]);
kfree(entries);
return table;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakub Kiciński | 228 | 100.00% | 1 | 100.00% |
| Total | 228 | 100.00% | 1 | 100.00% |
/**
* nfp_eth_set_mod_enable() - set PHY module enable control bit
* @cpp: NFP CPP handle
* @idx: NFP chip-wide port index
* @enable: Desired state
*
* Enable or disable PHY module (this usually means setting the TX lanes
* disable bits).
*
* Return: 0 or -ERRNO.
*/
int nfp_eth_set_mod_enable(struct nfp_cpp *cpp, unsigned int idx, bool enable)
{
struct eth_table_entry *entries;
struct nfp_nsp *nsp;
u64 reg;
int ret;
entries = kzalloc(NSP_ETH_TABLE_SIZE, GFP_KERNEL);
if (!entries)
return -ENOMEM;
nsp = nfp_nsp_open(cpp);
if (IS_ERR(nsp)) {
kfree(entries);
return PTR_ERR(nsp);
}
ret = nfp_nsp_read_eth_table(nsp, entries, NSP_ETH_TABLE_SIZE);
if (ret < 0) {
nfp_err(cpp, "reading port table failed %d\n", ret);
goto exit_close_nsp;
}
if (!(entries[idx].port & NSP_ETH_PORT_LANES_MASK)) {
nfp_warn(cpp, "trying to set port state on disabled port %d\n",
idx);
ret = -EINVAL;
goto exit_close_nsp;
}
/* Check if we are already in requested state */
reg = le64_to_cpu(entries[idx].state);
if (enable == FIELD_GET(NSP_ETH_CTRL_ENABLED, reg)) {
ret = 0;
goto exit_close_nsp;
}
reg = le64_to_cpu(entries[idx].control);
reg &= ~NSP_ETH_CTRL_ENABLED;
reg |= FIELD_PREP(NSP_ETH_CTRL_ENABLED, enable);
entries[idx].control = cpu_to_le64(reg);
ret = nfp_nsp_write_eth_table(nsp, entries, NSP_ETH_TABLE_SIZE);
exit_close_nsp:
nfp_nsp_close(nsp);
kfree(entries);
return ret < 0 ? ret : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakub Kiciński | 245 | 100.00% | 1 | 100.00% |
| Total | 245 | 100.00% | 1 | 100.00% |
Overall Contributors
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| Jakub Kiciński | 968 | 100.00% | 1 | 100.00% |
| Total | 968 | 100.00% | 1 | 100.00% |
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