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linux-nv-oot/drivers/net/ethernet/realtek/r8168/r8168_rss.c
Revanth Kumar Uppala ae13276f5d r8168: Change file permissions of source files 
Remove executable permissions for source files

Bug 4471899

Change-Id: I4d259b03014a8853b9baf0d04265ad521fefddb9
Signed-off-by: Revanth Kumar Uppala <ruppala@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3123346
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Brad Griffis <bgriffis@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
2024-05-14 15:45:28 -07:00

501 lines
15 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
################################################################################
#
# r8168 is the Linux device driver released for Realtek Gigabit Ethernet
# controllers with PCI-Express interface.
#
# Copyright(c) 2024 Realtek Semiconductor Corp. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, see <http://www.gnu.org/licenses/>.
#
# Author:
# Realtek NIC software team <nicfae@realtek.com>
# No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan
#
################################################################################
*/
/************************************************************************************
* This product is covered by one or more of the following patents:
* US6,570,884, US6,115,776, and US6,327,625.
***********************************************************************************/
#include <linux/version.h>
#include "r8168.h"
enum rtl8168_rss_register_content {
/* RSS */
RSS_CTRL_TCP_IPV4_SUPP = (1 << 0),
RSS_CTRL_IPV4_SUPP = (1 << 1),
RSS_CTRL_TCP_IPV6_SUPP = (1 << 2),
RSS_CTRL_IPV6_SUPP = (1 << 3),
RSS_CTRL_IPV6_EXT_SUPP = (1 << 4),
RSS_CTRL_TCP_IPV6_EXT_SUPP = (1 << 5),
RSS_HALF_SUPP = (1 << 7),
RSS_QUAD_CPU_EN = (1 << 16),
RSS_HQ_Q_SUP_R = (1 << 31),
};
static int rtl8168_get_rss_hash_opts(struct rtl8168_private *tp,
struct ethtool_rxnfc *cmd)
{
cmd->data = 0;
/* Report default options for RSS */
switch (cmd->flow_type) {
case TCP_V4_FLOW:
cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
fallthrough;
case IPV4_FLOW:
cmd->data |= RXH_IP_SRC | RXH_IP_DST;
break;
case TCP_V6_FLOW:
cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
fallthrough;
case IPV6_FLOW:
cmd->data |= RXH_IP_SRC | RXH_IP_DST;
break;
default:
return -EINVAL;
}
return 0;
}
int rtl8168_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
u32 *rule_locs)
{
struct rtl8168_private *tp = netdev_priv(dev);
int ret = -EOPNOTSUPP;
netif_info(tp, drv, tp->dev, "rss get rxnfc\n");
if (!(dev->features & NETIF_F_RXHASH))
return ret;
switch (cmd->cmd) {
case ETHTOOL_GRXRINGS:
cmd->data = rtl8168_tot_rx_rings(tp);
ret = 0;
break;
case ETHTOOL_GRXFH:
ret = rtl8168_get_rss_hash_opts(tp, cmd);
break;
default:
break;
}
return ret;
}
u32 rtl8168_rss_indir_tbl_entries(struct rtl8168_private *tp)
{
return tp->HwSuppIndirTblEntries;
}
#define RSS_MASK_BITS_OFFSET (8)
static int _rtl8168_set_rss_hash_opt(struct rtl8168_private *tp)
{
u32 hash_mask_len;
u32 rss_ctrl;
/* Perform hash on these packet types */
rss_ctrl = RSS_CTRL_TCP_IPV4_SUPP
| RSS_CTRL_IPV4_SUPP
| RSS_CTRL_IPV6_SUPP
| RSS_CTRL_IPV6_EXT_SUPP
| RSS_CTRL_TCP_IPV6_SUPP
| RSS_CTRL_TCP_IPV6_EXT_SUPP;
if (R8168_MULTI_RSS_4Q(tp))
rss_ctrl |= RSS_QUAD_CPU_EN;
hash_mask_len = ilog2(rtl8168_rss_indir_tbl_entries(tp));
hash_mask_len &= (BIT_0 | BIT_1 | BIT_2);
rss_ctrl |= hash_mask_len << RSS_MASK_BITS_OFFSET;
rtl8168_eri_write(tp, RSS_CTRL_8168, 4, rss_ctrl, ERIAR_ExGMAC);
return 0;
}
static int rtl8168_set_rss_hash_opt(struct rtl8168_private *tp,
struct ethtool_rxnfc *nfc)
{
u32 rss_flags = tp->rss_flags;
netif_info(tp, drv, tp->dev, "rss set hash\n");
/*
* RSS does not support anything other than hashing
* to queues on src and dst IPs and ports
*/
if (nfc->data & ~(RXH_IP_SRC | RXH_IP_DST |
RXH_L4_B_0_1 | RXH_L4_B_2_3))
return -EINVAL;
switch (nfc->flow_type) {
case TCP_V4_FLOW:
case TCP_V6_FLOW:
if (!(nfc->data & RXH_IP_SRC) ||
!(nfc->data & RXH_IP_DST) ||
!(nfc->data & RXH_L4_B_0_1) ||
!(nfc->data & RXH_L4_B_2_3))
return -EINVAL;
break;
case SCTP_V4_FLOW:
case AH_ESP_V4_FLOW:
case AH_V4_FLOW:
case ESP_V4_FLOW:
case SCTP_V6_FLOW:
case AH_ESP_V6_FLOW:
case AH_V6_FLOW:
case ESP_V6_FLOW:
case IP_USER_FLOW:
case ETHER_FLOW:
/* RSS is not supported for these protocols */
if (nfc->data) {
netif_err(tp, drv, tp->dev, "Command parameters not supported\n");
return -EINVAL;
}
return 0;
default:
return -EINVAL;
}
/* if we changed something we need to update flags */
if (rss_flags != tp->rss_flags) {
u32 rss_ctrl = rtl8168_eri_read(tp, RSS_CTRL_8168, 4, ERIAR_ExGMAC);
tp->rss_flags = rss_flags;
/* Perform hash on these packet types */
rss_ctrl |= RSS_CTRL_TCP_IPV4_SUPP
| RSS_CTRL_IPV4_SUPP
| RSS_CTRL_IPV6_SUPP
| RSS_CTRL_IPV6_EXT_SUPP
| RSS_CTRL_TCP_IPV6_SUPP
| RSS_CTRL_TCP_IPV6_EXT_SUPP;
if (R8168_MULTI_RSS_4Q(tp))
rss_ctrl |= RSS_QUAD_CPU_EN;
else
rss_ctrl &= ~RSS_QUAD_CPU_EN;
rtl8168_eri_write(tp, RSS_CTRL_8168, 4, rss_ctrl, ERIAR_ExGMAC);
}
return 0;
}
int rtl8168_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
{
struct rtl8168_private *tp = netdev_priv(dev);
int ret = -EOPNOTSUPP;
netif_info(tp, drv, tp->dev, "rss set rxnfc\n");
if (!(dev->features & NETIF_F_RXHASH))
return ret;
switch (cmd->cmd) {
case ETHTOOL_SRXFH:
ret = rtl8168_set_rss_hash_opt(tp, cmd);
break;
default:
break;
}
return ret;
}
static u32 _rtl8168_get_rxfh_key_size(struct rtl8168_private *tp)
{
return sizeof(tp->rss_key);
}
u32 rtl8168_get_rxfh_key_size(struct net_device *dev)
{
struct rtl8168_private *tp = netdev_priv(dev);
netif_info(tp, drv, tp->dev, "rss get key size\n");
if (!(dev->features & NETIF_F_RXHASH))
return 0;
return _rtl8168_get_rxfh_key_size(tp);
}
u32 rtl8168_rss_indir_size(struct net_device *dev)
{
struct rtl8168_private *tp = netdev_priv(dev);
netif_info(tp, drv, tp->dev, "rss get indir tbl size\n");
if (!(dev->features & NETIF_F_RXHASH))
return 0;
return rtl8168_rss_indir_tbl_entries(tp);
}
static void rtl8168_get_reta(struct rtl8168_private *tp, u32 *indir)
{
int i, reta_size = rtl8168_rss_indir_tbl_entries(tp);
for (i = 0; i < reta_size; i++)
indir[i] = tp->rss_indir_tbl[i];
}
static u32 rtl8168_rss_key_reg(struct rtl8168_private *tp)
{
return RSS_KEY_8168;
}
static u32 rtl8168_rss_indir_tbl_reg(struct rtl8168_private *tp)
{
return Rss_indir_tbl;
}
static void rtl8168_store_reta(struct rtl8168_private *tp)
{
u32 reta_entries = rtl8168_rss_indir_tbl_entries(tp);
u16 indir_tbl_reg = rtl8168_rss_indir_tbl_reg(tp);
u32 hw_indir[RTL8168_RSS_INDIR_TBL_SIZE] = {0};
u8 *indir = tp->rss_indir_tbl;
u32 bit_on_cnt = 0x00000001;
u32 i, j;
/* Mapping redirection table to HW */
for (i = 0, j = 0; i < reta_entries; i++) {
if ((indir[i] & 2) && R8168_MULTI_RSS_4Q(tp))
hw_indir[j + 4] |= bit_on_cnt;
if (indir[i] & 1)
hw_indir[j] |= bit_on_cnt;
if (bit_on_cnt == 0x80000000) {
bit_on_cnt = 0x00000001;
j++;
continue;
}
bit_on_cnt <<= 1;
}
/* Write redirection table to HW */
for (i = 0; i < RTL8168_RSS_INDIR_TBL_SIZE; i++)
RTL_W32(tp, indir_tbl_reg + i*4, hw_indir[i]);
}
static void rtl8168_store_rss_key(struct rtl8168_private *tp)
{
const u16 rss_key_reg = rtl8168_rss_key_reg(tp);
u32 i, rss_key_size = _rtl8168_get_rxfh_key_size(tp);
u32 *rss_key = (u32*)tp->rss_key;
/* Write redirection table to HW */
for (i = 0; i < rss_key_size; i+=4)
rtl8168_eri_write(tp, rss_key_reg + i, 4, *rss_key++, ERIAR_ExGMAC);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6,8,0)
int rtl8168_get_rxfh(struct net_device *dev, struct ethtool_rxfh_param *rxfh)
{
struct rtl8168_private *tp = netdev_priv(dev);
netif_info(tp, drv, tp->dev, "rss get rxfh\n");
if (!(dev->features & NETIF_F_RXHASH))
return -EOPNOTSUPP;
rxfh->hfunc = ETH_RSS_HASH_TOP;
if (rxfh->indir)
rtl8168_get_reta(tp, rxfh->indir);
if (rxfh->key)
memcpy(rxfh->key, tp->rss_key, RTL8168_RSS_KEY_SIZE);
return 0;
}
int rtl8168_set_rxfh(struct net_device *dev, struct ethtool_rxfh_param *rxfh,
struct netlink_ext_ack *extack)
{
struct rtl8168_private *tp = netdev_priv(dev);
u32 reta_entries = rtl8168_rss_indir_tbl_entries(tp);
int i;
netif_info(tp, drv, tp->dev, "rss set rxfh\n");
/* We require at least one supported parameter to be changed and no
* change in any of the unsupported parameters
*/
if (rxfh->hfunc != ETH_RSS_HASH_NO_CHANGE && rxfh->hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
/* Fill out the redirection table */
if (rxfh->indir) {
int max_queues = tp->num_rx_rings;
/* Verify user input. */
for (i = 0; i < reta_entries; i++)
if (rxfh->indir[i] >= max_queues)
return -EINVAL;
for (i = 0; i < reta_entries; i++)
tp->rss_indir_tbl[i] = rxfh->indir[i];
}
/* Fill out the rss hash key */
if (rxfh->key)
memcpy(tp->rss_key, rxfh->key, RTL8168_RSS_KEY_SIZE);
rtl8168_store_reta(tp);
rtl8168_store_rss_key(tp);
return 0;
}
#else
int rtl8168_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
u8 *hfunc)
{
struct rtl8168_private *tp = netdev_priv(dev);
netif_info(tp, drv, tp->dev, "rss get rxfh\n");
if (!(dev->features & NETIF_F_RXHASH))
return -EOPNOTSUPP;
if (hfunc)
*hfunc = ETH_RSS_HASH_TOP;
if (indir)
rtl8168_get_reta(tp, indir);
if (key)
memcpy(key, tp->rss_key, RTL8168_RSS_KEY_SIZE);
return 0;
}
int rtl8168_set_rxfh(struct net_device *dev, const u32 *indir,
const u8 *key, const u8 hfunc)
{
struct rtl8168_private *tp = netdev_priv(dev);
u32 reta_entries = rtl8168_rss_indir_tbl_entries(tp);
int i;
netif_info(tp, drv, tp->dev, "rss set rxfh\n");
/* We require at least one supported parameter to be changed and no
* change in any of the unsupported parameters
*/
if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP)
return -EOPNOTSUPP;
/* Fill out the redirection table */
if (indir) {
int max_queues = tp->num_rx_rings;
/* Verify user input. */
for (i = 0; i < reta_entries; i++)
if (indir[i] >= max_queues)
return -EINVAL;
for (i = 0; i < reta_entries; i++)
tp->rss_indir_tbl[i] = indir[i];
}
/* Fill out the rss hash key */
if (key)
memcpy(tp->rss_key, key, RTL8168_RSS_KEY_SIZE);
rtl8168_store_reta(tp);
rtl8168_store_rss_key(tp);
return 0;
}
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(6,8,0) */
static u32 rtl8168_get_rx_desc_hash(struct rtl8168_private *tp,
struct RxDescV2 *desc)
{
if (!desc->RSSResult)
udelay(1);
return le32_to_cpu(desc->RSSResult);
}
#define RXS_8168_RSS_IPV4 BIT(17)
#define RXS_8168_RSS_IPV6 BIT(18)
#define RXS_8168_RSS_TCP BIT(19)
#define RTL8168_RXS_RSS_L3_TYPE_MASK (RXS_8168_RSS_IPV4 | RXS_8168_RSS_IPV6)
#define RTL8168_RXS_RSS_L4_TYPE_MASK (RXS_8168_RSS_TCP)
void rtl8168_rx_hash(struct rtl8168_private *tp,
struct RxDescV2 *desc,
struct sk_buff *skb)
{
u32 rss_header_info;
if (!(tp->dev->features & NETIF_F_RXHASH))
return;
rss_header_info = le32_to_cpu(desc->opts2);
if (!(rss_header_info & RTL8168_RXS_RSS_L3_TYPE_MASK))
return;
skb_set_hash(skb, rtl8168_get_rx_desc_hash(tp, desc),
(RTL8168_RXS_RSS_L4_TYPE_MASK & rss_header_info) ?
PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
}
void rtl8168_disable_rss(struct rtl8168_private *tp)
{
rtl8168_eri_write(tp, RSS_CTRL_8168, 4, 0x00000000, ERIAR_ExGMAC);
}
void _rtl8168_config_rss(struct rtl8168_private *tp)
{
_rtl8168_set_rss_hash_opt(tp);
rtl8168_store_reta(tp);
rtl8168_store_rss_key(tp);
}
void rtl8168_config_rss(struct rtl8168_private *tp)
{
if (!HW_RSS_SUPPORT_RSS(tp))
return;
if (!tp->EnableRss) {
rtl8168_disable_rss(tp);
return;
}
_rtl8168_config_rss(tp);
}
void rtl8168_init_rss(struct rtl8168_private *tp)
{
int i;
for (i = 0; i < rtl8168_rss_indir_tbl_entries(tp); i++)
tp->rss_indir_tbl[i] = ethtool_rxfh_indir_default(i, tp->num_rx_rings);
netdev_rss_key_fill(tp->rss_key, RTL8168_RSS_KEY_SIZE);
}
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