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qed/qede: Add setter APIs support for RX flow classification 

This patch adds support for adding and deleting rx flow
classification rules. Using this user can classify RX flow
constituting of TCP/UDP 4-tuples [src_ip/dst_ip and src_port/dst_port]
to be steered on a given RX queue

Signed-off-by: Manish Chopra <manish.chopra@cavium.com>
Signed-off-by: Yuval Mintz <yuval.mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chopra, Manish 2017-07-26 06:07:10 -07:00 committed by David S. Miller
parent ec9b8dbd82
commit 3f2a2b8b7a
5 changed files with 348 additions and 61 deletions
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8
drivers/net/ethernet/qlogic/qed/qed_main.c
View File

@ -954,9 +954,7 @@ static int qed_slowpath_start(struct qed_dev *cdev,
struct qed_tunnel_info tunn_info;
const u8 *data = NULL;
struct qed_hwfn *hwfn;
#ifdef CONFIG_RFS_ACCEL
struct qed_ptt *p_ptt;
#endif
int rc = -EINVAL;
if (qed_iov_wq_start(cdev))
@ -972,7 +970,6 @@ static int qed_slowpath_start(struct qed_dev *cdev,
goto err;
}
#ifdef CONFIG_RFS_ACCEL
if (cdev->num_hwfns == 1) {
p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
if (p_ptt) {
@ -983,7 +980,6 @@ static int qed_slowpath_start(struct qed_dev *cdev,
goto err;
}
}
#endif
}
cdev->rx_coalesce_usecs = QED_DEFAULT_RX_USECS;
@ -1091,12 +1087,10 @@ err:
if (IS_PF(cdev))
release_firmware(cdev->firmware);
#ifdef CONFIG_RFS_ACCEL
if (IS_PF(cdev) && (cdev->num_hwfns == 1) &&
QED_LEADING_HWFN(cdev)->p_arfs_ptt)
qed_ptt_release(QED_LEADING_HWFN(cdev),
QED_LEADING_HWFN(cdev)->p_arfs_ptt);
#endif
qed_iov_wq_stop(cdev, false);
@ -1111,11 +1105,9 @@ static int qed_slowpath_stop(struct qed_dev *cdev)
qed_ll2_dealloc_if(cdev);
if (IS_PF(cdev)) {
#ifdef CONFIG_RFS_ACCEL
if (cdev->num_hwfns == 1)
qed_ptt_release(QED_LEADING_HWFN(cdev),
QED_LEADING_HWFN(cdev)->p_arfs_ptt);
#endif
qed_free_stream_mem(cdev);
if (IS_QED_ETH_IF(cdev))
qed_sriov_disable(cdev, true);

11
drivers/net/ethernet/qlogic/qede/qede.h
View File

@ -447,16 +447,17 @@ struct qede_fastpath {
#ifdef CONFIG_RFS_ACCEL
int qede_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
u16 rxq_index, u32 flow_id);
#define QEDE_SP_ARFS_CONFIG 4
#define QEDE_SP_TASK_POLL_DELAY (5 * HZ)
#endif
void qede_process_arfs_filters(struct qede_dev *edev, bool free_fltr);
void qede_poll_for_freeing_arfs_filters(struct qede_dev *edev);
void qede_arfs_filter_op(void *dev, void *filter, u8 fw_rc);
void qede_free_arfs(struct qede_dev *edev);
int qede_alloc_arfs(struct qede_dev *edev);
#define QEDE_SP_ARFS_CONFIG 4
#define QEDE_SP_TASK_POLL_DELAY (5 * HZ)
#endif
int qede_add_cls_rule(struct qede_dev *edev, struct ethtool_rxnfc *info);
int qede_del_cls_rule(struct qede_dev *edev, struct ethtool_rxnfc *info);
int qede_get_cls_rule_entry(struct qede_dev *edev, struct ethtool_rxnfc *cmd);
int qede_get_cls_rule_all(struct qede_dev *edev, struct ethtool_rxnfc *info,
u32 *rule_locs);

14
drivers/net/ethernet/qlogic/qede/qede_ethtool.c
View File

@ -1182,14 +1182,24 @@ static int qede_set_rss_flags(struct qede_dev *edev, struct ethtool_rxnfc *info)
static int qede_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info)
{
struct qede_dev *edev = netdev_priv(dev);
int rc;
switch (info->cmd) {
case ETHTOOL_SRXFH:
return qede_set_rss_flags(edev, info);
rc = qede_set_rss_flags(edev, info);
break;
case ETHTOOL_SRXCLSRLINS:
rc = qede_add_cls_rule(edev, info);
break;
case ETHTOOL_SRXCLSRLDEL:
rc = qede_del_cls_rule(edev, info);
break;
default:
DP_INFO(edev, "Command parameters not supported\n");
return -EOPNOTSUPP;
rc = -EOPNOTSUPP;
}
return rc;
}
static u32 qede_get_rxfh_indir_size(struct net_device *dev)

363
drivers/net/ethernet/qlogic/qede/qede_filter.c
View File

@ -75,6 +75,7 @@ struct qede_arfs_fltr_node {
u16 next_rxq_id;
bool filter_op;
bool used;
u8 fw_rc;
struct hlist_node node;
};
@ -92,7 +93,6 @@ struct qede_arfs {
bool enable;
};
#ifdef CONFIG_RFS_ACCEL
static void qede_configure_arfs_fltr(struct qede_dev *edev,
struct qede_arfs_fltr_node *n,
u16 rxq_id, bool add_fltr)
@ -122,11 +122,56 @@ qede_free_arfs_filter(struct qede_dev *edev, struct qede_arfs_fltr_node *fltr)
kfree(fltr);
}
static int
qede_enqueue_fltr_and_config_searcher(struct qede_dev *edev,
struct qede_arfs_fltr_node *fltr,
u16 bucket_idx)
{
fltr->mapping = dma_map_single(&edev->pdev->dev, fltr->data,
fltr->buf_len, DMA_TO_DEVICE);
if (dma_mapping_error(&edev->pdev->dev, fltr->mapping)) {
DP_NOTICE(edev, "Failed to map DMA memory for rule\n");
qede_free_arfs_filter(edev, fltr);
return -ENOMEM;
}
INIT_HLIST_NODE(&fltr->node);
hlist_add_head(&fltr->node,
QEDE_ARFS_BUCKET_HEAD(edev, bucket_idx));
edev->arfs->filter_count++;
if (edev->arfs->filter_count == 1 && !edev->arfs->enable) {
edev->ops->configure_arfs_searcher(edev->cdev, true);
edev->arfs->enable = true;
}
return 0;
}
static void
qede_dequeue_fltr_and_config_searcher(struct qede_dev *edev,
struct qede_arfs_fltr_node *fltr)
{
hlist_del(&fltr->node);
dma_unmap_single(&edev->pdev->dev, fltr->mapping,
fltr->buf_len, DMA_TO_DEVICE);
qede_free_arfs_filter(edev, fltr);
edev->arfs->filter_count--;
if (!edev->arfs->filter_count && edev->arfs->enable) {
edev->arfs->enable = false;
edev->ops->configure_arfs_searcher(edev->cdev, false);
}
}
void qede_arfs_filter_op(void *dev, void *filter, u8 fw_rc)
{
struct qede_arfs_fltr_node *fltr = filter;
struct qede_dev *edev = dev;
fltr->fw_rc = fw_rc;
if (fw_rc) {
DP_NOTICE(edev,
"Failed arfs filter configuration fw_rc=%d, flow_id=%d, sw_id=%d, src_port=%d, dst_port=%d, rxq=%d\n",
@ -186,18 +231,17 @@ void qede_process_arfs_filters(struct qede_dev *edev, bool free_fltr)
if ((!test_bit(QEDE_FLTR_VALID, &fltr->state) &&
!fltr->used) || free_fltr) {
hlist_del(&fltr->node);
dma_unmap_single(&edev->pdev->dev,
fltr->mapping,
fltr->buf_len, DMA_TO_DEVICE);
qede_free_arfs_filter(edev, fltr);
edev->arfs->filter_count--;
qede_dequeue_fltr_and_config_searcher(edev,
fltr);
} else {
if ((rps_may_expire_flow(edev->ndev,
bool flow_exp = false;
#ifdef CONFIG_RFS_ACCEL
flow_exp = rps_may_expire_flow(edev->ndev,
fltr->rxq_id,
fltr->flow_id,
fltr->sw_id) || del) &&
!free_fltr)
fltr->sw_id);
#endif
if ((flow_exp || del) && !free_fltr)
qede_configure_arfs_fltr(edev, fltr,
fltr->rxq_id,
false);
@ -214,10 +258,12 @@ void qede_process_arfs_filters(struct qede_dev *edev, bool free_fltr)
edev->arfs->enable = false;
edev->ops->configure_arfs_searcher(edev->cdev, false);
}
#ifdef CONFIG_RFS_ACCEL
} else {
set_bit(QEDE_SP_ARFS_CONFIG, &edev->sp_flags);
schedule_delayed_work(&edev->sp_task,
QEDE_SP_TASK_POLL_DELAY);
#endif
}
spin_unlock_bh(&edev->arfs->arfs_list_lock);
@ -259,25 +305,26 @@ int qede_alloc_arfs(struct qede_dev *edev)
spin_lock_init(&edev->arfs->arfs_list_lock);
for (i = 0; i <= QEDE_RFS_FLW_MASK; i++)
INIT_HLIST_HEAD(&edev->arfs->arfs_hl_head[i]);
edev->ndev->rx_cpu_rmap = alloc_irq_cpu_rmap(QEDE_RSS_COUNT(edev));
if (!edev->ndev->rx_cpu_rmap) {
vfree(edev->arfs);
edev->arfs = NULL;
return -ENOMEM;
}
INIT_HLIST_HEAD(QEDE_ARFS_BUCKET_HEAD(edev, i));
edev->arfs->arfs_fltr_bmap = vzalloc(BITS_TO_LONGS(QEDE_RFS_MAX_FLTR) *
sizeof(long));
if (!edev->arfs->arfs_fltr_bmap) {
free_irq_cpu_rmap(edev->ndev->rx_cpu_rmap);
edev->ndev->rx_cpu_rmap = NULL;
vfree(edev->arfs);
edev->arfs = NULL;
return -ENOMEM;
}
#ifdef CONFIG_RFS_ACCEL
edev->ndev->rx_cpu_rmap = alloc_irq_cpu_rmap(QEDE_RSS_COUNT(edev));
if (!edev->ndev->rx_cpu_rmap) {
vfree(edev->arfs->arfs_fltr_bmap);
edev->arfs->arfs_fltr_bmap = NULL;
vfree(edev->arfs);
edev->arfs = NULL;
return -ENOMEM;
}
#endif
return 0;
}
@ -286,16 +333,19 @@ void qede_free_arfs(struct qede_dev *edev)
if (!edev->arfs)
return;
#ifdef CONFIG_RFS_ACCEL
if (edev->ndev->rx_cpu_rmap)
free_irq_cpu_rmap(edev->ndev->rx_cpu_rmap);
edev->ndev->rx_cpu_rmap = NULL;
#endif
vfree(edev->arfs->arfs_fltr_bmap);
edev->arfs->arfs_fltr_bmap = NULL;
vfree(edev->arfs);
edev->arfs = NULL;
}
#ifdef CONFIG_RFS_ACCEL
static bool qede_compare_ip_addr(struct qede_arfs_fltr_node *tpos,
const struct sk_buff *skb)
{
@ -395,9 +445,8 @@ int qede_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
spin_lock_bh(&edev->arfs->arfs_list_lock);
n = qede_arfs_htbl_key_search(&edev->arfs->arfs_hl_head[tbl_idx],
n = qede_arfs_htbl_key_search(QEDE_ARFS_BUCKET_HEAD(edev, tbl_idx),
skb, ports[0], ports[1], ip_proto);
if (n) {
/* Filter match */
n->next_rxq_id = rxq_index;
@ -449,23 +498,9 @@ int qede_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
n->tuple.ip_proto = ip_proto;
memcpy(n->data + ETH_HLEN, skb->data, skb_headlen(skb));
n->mapping = dma_map_single(&edev->pdev->dev, n->data,
n->buf_len, DMA_TO_DEVICE);
if (dma_mapping_error(&edev->pdev->dev, n->mapping)) {
DP_NOTICE(edev, "Failed to map DMA memory for arfs\n");
qede_free_arfs_filter(edev, n);
rc = -ENOMEM;
rc = qede_enqueue_fltr_and_config_searcher(edev, n, tbl_idx);
if (rc)
goto ret_unlock;
}
INIT_HLIST_NODE(&n->node);
hlist_add_head(&n->node, &edev->arfs->arfs_hl_head[tbl_idx]);
edev->arfs->filter_count++;
if (edev->arfs->filter_count == 1 && !edev->arfs->enable) {
edev->ops->configure_arfs_searcher(edev->cdev, true);
edev->arfs->enable = true;
}
qede_configure_arfs_fltr(edev, n, n->rxq_id, true);
@ -473,6 +508,7 @@ int qede_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
set_bit(QEDE_SP_ARFS_CONFIG, &edev->sp_flags);
schedule_delayed_work(&edev->sp_task, 0);
return n->sw_id;
ret_unlock:
@ -1277,6 +1313,38 @@ qede_get_arfs_fltr_by_loc(struct hlist_head *head, u32 location)
return NULL;
}
static bool
qede_compare_user_flow_ips(struct qede_arfs_fltr_node *tpos,
struct ethtool_rx_flow_spec *fsp,
__be16 proto)
{
if (proto == htons(ETH_P_IP)) {
struct ethtool_tcpip4_spec *ip;
ip = &fsp->h_u.tcp_ip4_spec;
if (tpos->tuple.src_ipv4 == ip->ip4src &&
tpos->tuple.dst_ipv4 == ip->ip4dst)
return true;
else
return false;
} else {
struct ethtool_tcpip6_spec *ip6;
struct in6_addr *src;
ip6 = &fsp->h_u.tcp_ip6_spec;
src = &tpos->tuple.src_ipv6;
if (!memcmp(src, &ip6->ip6src, sizeof(struct in6_addr)) &&
!memcmp(&tpos->tuple.dst_ipv6, &ip6->ip6dst,
sizeof(struct in6_addr)))
return true;
else
return false;
}
return false;
}
int qede_get_cls_rule_all(struct qede_dev *edev, struct ethtool_rxnfc *info,
u32 *rule_locs)
{
@ -1366,6 +1434,225 @@ unlock:
return rc;
}
static int
qede_validate_and_check_flow_exist(struct qede_dev *edev,
struct ethtool_rx_flow_spec *fsp,
int *min_hlen)
{
__be16 src_port = 0x0, dst_port = 0x0;
struct qede_arfs_fltr_node *fltr;
struct hlist_node *temp;
struct hlist_head *head;
__be16 eth_proto;
u8 ip_proto;
if (fsp->location >= QEDE_RFS_MAX_FLTR ||
fsp->ring_cookie >= QEDE_RSS_COUNT(edev))
return -EINVAL;
if (fsp->flow_type == TCP_V4_FLOW) {
*min_hlen += sizeof(struct iphdr) +
sizeof(struct tcphdr);
eth_proto = htons(ETH_P_IP);
ip_proto = IPPROTO_TCP;
} else if (fsp->flow_type == UDP_V4_FLOW) {
*min_hlen += sizeof(struct iphdr) +
sizeof(struct udphdr);
eth_proto = htons(ETH_P_IP);
ip_proto = IPPROTO_UDP;
} else if (fsp->flow_type == TCP_V6_FLOW) {
*min_hlen += sizeof(struct ipv6hdr) +
sizeof(struct tcphdr);
eth_proto = htons(ETH_P_IPV6);
ip_proto = IPPROTO_TCP;
} else if (fsp->flow_type == UDP_V6_FLOW) {
*min_hlen += sizeof(struct ipv6hdr) +
sizeof(struct udphdr);
eth_proto = htons(ETH_P_IPV6);
ip_proto = IPPROTO_UDP;
} else {
DP_NOTICE(edev, "Unsupported flow type = 0x%x\n",
fsp->flow_type);
return -EPROTONOSUPPORT;
}
if (eth_proto == htons(ETH_P_IP)) {
src_port = fsp->h_u.tcp_ip4_spec.psrc;
dst_port = fsp->h_u.tcp_ip4_spec.pdst;
} else {
src_port = fsp->h_u.tcp_ip6_spec.psrc;
dst_port = fsp->h_u.tcp_ip6_spec.pdst;
}
head = QEDE_ARFS_BUCKET_HEAD(edev, 0);
hlist_for_each_entry_safe(fltr, temp, head, node) {
if ((fltr->tuple.ip_proto == ip_proto &&
fltr->tuple.eth_proto == eth_proto &&
qede_compare_user_flow_ips(fltr, fsp, eth_proto) &&
fltr->tuple.src_port == src_port &&
fltr->tuple.dst_port == dst_port) ||
fltr->sw_id == fsp->location)
return -EEXIST;
}
return 0;
}
static int
qede_poll_arfs_filter_config(struct qede_dev *edev,
struct qede_arfs_fltr_node *fltr)
{
int count = QEDE_ARFS_POLL_COUNT;
while (fltr->used && count) {
msleep(20);
count--;
}
if (count == 0 || fltr->fw_rc) {
qede_dequeue_fltr_and_config_searcher(edev, fltr);
return -EIO;
}
return fltr->fw_rc;
}
int qede_add_cls_rule(struct qede_dev *edev, struct ethtool_rxnfc *info)
{
struct ethtool_rx_flow_spec *fsp = &info->fs;
struct qede_arfs_fltr_node *n;
int min_hlen = ETH_HLEN, rc;
struct ethhdr *eth;
struct iphdr *ip;
__be16 *ports;
__qede_lock(edev);
if (!edev->arfs) {
rc = -EPERM;
goto unlock;
}
rc = qede_validate_and_check_flow_exist(edev, fsp, &min_hlen);
if (rc)
goto unlock;
n = kzalloc(sizeof(*n), GFP_KERNEL);
if (!n) {
rc = -ENOMEM;
goto unlock;
}
n->data = kzalloc(min_hlen, GFP_KERNEL);
if (!n->data) {
kfree(n);
rc = -ENOMEM;
goto unlock;
}
n->sw_id = fsp->location;
set_bit(n->sw_id, edev->arfs->arfs_fltr_bmap);
n->buf_len = min_hlen;
n->rxq_id = fsp->ring_cookie;
n->next_rxq_id = n->rxq_id;
eth = (struct ethhdr *)n->data;
if (info->fs.flow_type == TCP_V4_FLOW ||
info->fs.flow_type == UDP_V4_FLOW) {
ports = (__be16 *)(n->data + ETH_HLEN +
sizeof(struct iphdr));
eth->h_proto = htons(ETH_P_IP);
n->tuple.eth_proto = htons(ETH_P_IP);
n->tuple.src_ipv4 = info->fs.h_u.tcp_ip4_spec.ip4src;
n->tuple.dst_ipv4 = info->fs.h_u.tcp_ip4_spec.ip4dst;
n->tuple.src_port = info->fs.h_u.tcp_ip4_spec.psrc;
n->tuple.dst_port = info->fs.h_u.tcp_ip4_spec.pdst;
ports[0] = n->tuple.src_port;
ports[1] = n->tuple.dst_port;
ip = (struct iphdr *)(n->data + ETH_HLEN);
ip->saddr = info->fs.h_u.tcp_ip4_spec.ip4src;
ip->daddr = info->fs.h_u.tcp_ip4_spec.ip4dst;
ip->version = 0x4;
ip->ihl = 0x5;
if (info->fs.flow_type == TCP_V4_FLOW) {
n->tuple.ip_proto = IPPROTO_TCP;
ip->protocol = IPPROTO_TCP;
} else {
n->tuple.ip_proto = IPPROTO_UDP;
ip->protocol = IPPROTO_UDP;
}
ip->tot_len = cpu_to_be16(min_hlen - ETH_HLEN);
} else {
struct ipv6hdr *ip6;
ip6 = (struct ipv6hdr *)(n->data + ETH_HLEN);
ports = (__be16 *)(n->data + ETH_HLEN +
sizeof(struct ipv6hdr));
eth->h_proto = htons(ETH_P_IPV6);
n->tuple.eth_proto = htons(ETH_P_IPV6);
memcpy(&n->tuple.src_ipv6, &info->fs.h_u.tcp_ip6_spec.ip6src,
sizeof(struct in6_addr));
memcpy(&n->tuple.dst_ipv6, &info->fs.h_u.tcp_ip6_spec.ip6dst,
sizeof(struct in6_addr));
n->tuple.src_port = info->fs.h_u.tcp_ip6_spec.psrc;
n->tuple.dst_port = info->fs.h_u.tcp_ip6_spec.pdst;
ports[0] = n->tuple.src_port;
ports[1] = n->tuple.dst_port;
memcpy(&ip6->saddr, &n->tuple.src_ipv6,
sizeof(struct in6_addr));
memcpy(&ip6->daddr, &n->tuple.dst_ipv6,
sizeof(struct in6_addr));
ip6->version = 0x6;
if (info->fs.flow_type == TCP_V6_FLOW) {
n->tuple.ip_proto = IPPROTO_TCP;
ip6->nexthdr = NEXTHDR_TCP;
ip6->payload_len = cpu_to_be16(sizeof(struct tcphdr));
} else {
n->tuple.ip_proto = IPPROTO_UDP;
ip6->nexthdr = NEXTHDR_UDP;
ip6->payload_len = cpu_to_be16(sizeof(struct udphdr));
}
}
rc = qede_enqueue_fltr_and_config_searcher(edev, n, 0);
if (rc)
goto unlock;
qede_configure_arfs_fltr(edev, n, n->rxq_id, true);
rc = qede_poll_arfs_filter_config(edev, n);
unlock:
__qede_unlock(edev);
return rc;
}
int qede_del_cls_rule(struct qede_dev *edev, struct ethtool_rxnfc *info)
{
struct ethtool_rx_flow_spec *fsp = &info->fs;
struct qede_arfs_fltr_node *fltr = NULL;
int rc = -EPERM;
__qede_lock(edev);
if (!edev->arfs)
goto unlock;
fltr = qede_get_arfs_fltr_by_loc(QEDE_ARFS_BUCKET_HEAD(edev, 0),
fsp->location);
if (!fltr)
goto unlock;
qede_configure_arfs_fltr(edev, fltr, fltr->rxq_id, false);
rc = qede_poll_arfs_filter_config(edev, fltr);
if (rc == 0)
qede_dequeue_fltr_and_config_searcher(edev, fltr);
unlock:
__qede_unlock(edev);
return rc;
}
int qede_get_arfs_filter_count(struct qede_dev *edev)
{
int count = 0;

9
drivers/net/ethernet/qlogic/qede/qede_main.c
View File

@ -873,9 +873,7 @@ static void qede_update_pf_params(struct qed_dev *cdev)
*/
pf_params.eth_pf_params.num_vf_cons = 48;
#ifdef CONFIG_RFS_ACCEL
pf_params.eth_pf_params.num_arfs_filters = QEDE_RFS_MAX_FLTR;
#endif
qed_ops->common->update_pf_params(cdev, &pf_params);
}
@ -1984,12 +1982,12 @@ static void qede_unload(struct qede_dev *edev, enum qede_unload_mode mode,
qede_vlan_mark_nonconfigured(edev);
edev->ops->fastpath_stop(edev->cdev);
#ifdef CONFIG_RFS_ACCEL
if (!IS_VF(edev) && edev->dev_info.common.num_hwfns == 1) {
qede_poll_for_freeing_arfs_filters(edev);
qede_free_arfs(edev);
}
#endif
/* Release the interrupts */
qede_sync_free_irqs(edev);
edev->ops->common->set_fp_int(edev->cdev, 0);
@ -2041,13 +2039,12 @@ static int qede_load(struct qede_dev *edev, enum qede_load_mode mode,
if (rc)
goto err2;
#ifdef CONFIG_RFS_ACCEL
if (!IS_VF(edev) && edev->dev_info.common.num_hwfns == 1) {
rc = qede_alloc_arfs(edev);
if (rc)
DP_NOTICE(edev, "aRFS memory allocation failed\n");
}
#endif
qede_napi_add_enable(edev);
DP_INFO(edev, "Napi added and enabled\n");