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-rw-r--r--drivers/net/ethernet/cisco/enic/enic.h6
-rw-r--r--drivers/net/ethernet/cisco/enic/enic_main.c282
-rw-r--r--drivers/net/ethernet/cisco/enic/vnic_dev.c34
-rw-r--r--drivers/net/ethernet/cisco/enic/vnic_dev.h5
-rw-r--r--drivers/net/ethernet/cisco/enic/vnic_devcmd.h51
-rw-r--r--drivers/net/ethernet/cisco/enic/vnic_enet.h1
6 files changed, 364 insertions, 15 deletions
diff --git a/drivers/net/ethernet/cisco/enic/enic.h b/drivers/net/ethernet/cisco/enic/enic.h
index 9023c858715d..2b23f46b34d3 100644
--- a/drivers/net/ethernet/cisco/enic/enic.h
+++ b/drivers/net/ethernet/cisco/enic/enic.h
@@ -135,6 +135,11 @@ struct enic_rfs_flw_tbl {
struct timer_list rfs_may_expire;
};
+struct vxlan_offload {
+ u16 vxlan_udp_port_number;
+ u8 patch_level;
+};
+
/* Per-instance private data structure */
struct enic {
struct net_device *netdev;
@@ -175,6 +180,7 @@ struct enic {
/* receive queue cache line section */
____cacheline_aligned struct vnic_rq rq[ENIC_RQ_MAX];
unsigned int rq_count;
+ struct vxlan_offload vxlan;
u64 rq_truncated_pkts;
u64 rq_bad_fcs;
struct napi_struct napi[ENIC_RQ_MAX + ENIC_WQ_MAX];
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index c009f6ddabf7..4b87beeabce1 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -45,6 +45,7 @@
#endif
#include <linux/crash_dump.h>
#include <net/busy_poll.h>
+#include <net/vxlan.h>
#include "cq_enet_desc.h"
#include "vnic_dev.h"
@@ -176,6 +177,134 @@ static void enic_unset_affinity_hint(struct enic *enic)
irq_set_affinity_hint(enic->msix_entry[i].vector, NULL);
}
+static void enic_udp_tunnel_add(struct net_device *netdev,
+ struct udp_tunnel_info *ti)
+{
+ struct enic *enic = netdev_priv(netdev);
+ __be16 port = ti->port;
+ int err;
+
+ spin_lock_bh(&enic->devcmd_lock);
+
+ if (ti->type != UDP_TUNNEL_TYPE_VXLAN) {
+ netdev_info(netdev, "udp_tnl: only vxlan tunnel offload supported");
+ goto error;
+ }
+
+ if (ti->sa_family != AF_INET) {
+ netdev_info(netdev, "vxlan: only IPv4 offload supported");
+ goto error;
+ }
+
+ if (enic->vxlan.vxlan_udp_port_number) {
+ if (ntohs(port) == enic->vxlan.vxlan_udp_port_number)
+ netdev_warn(netdev, "vxlan: udp port already offloaded");
+ else
+ netdev_info(netdev, "vxlan: offload supported for only one UDP port");
+
+ goto error;
+ }
+
+ err = vnic_dev_overlay_offload_cfg(enic->vdev,
+ OVERLAY_CFG_VXLAN_PORT_UPDATE,
+ ntohs(port));
+ if (err)
+ goto error;
+
+ err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN,
+ enic->vxlan.patch_level);
+ if (err)
+ goto error;
+
+ enic->vxlan.vxlan_udp_port_number = ntohs(port);
+
+ netdev_info(netdev, "vxlan fw-vers-%d: offload enabled for udp port: %d, sa_family: %d ",
+ (int)enic->vxlan.patch_level, ntohs(port), ti->sa_family);
+
+ goto unlock;
+
+error:
+ netdev_info(netdev, "failed to offload udp port: %d, sa_family: %d, type: %d",
+ ntohs(port), ti->sa_family, ti->type);
+unlock:
+ spin_unlock_bh(&enic->devcmd_lock);
+}
+
+static void enic_udp_tunnel_del(struct net_device *netdev,
+ struct udp_tunnel_info *ti)
+{
+ struct enic *enic = netdev_priv(netdev);
+ int err;
+
+ spin_lock_bh(&enic->devcmd_lock);
+
+ if ((ti->sa_family != AF_INET) ||
+ ((ntohs(ti->port) != enic->vxlan.vxlan_udp_port_number)) ||
+ (ti->type != UDP_TUNNEL_TYPE_VXLAN)) {
+ netdev_info(netdev, "udp_tnl: port:%d, sa_family: %d, type: %d not offloaded",
+ ntohs(ti->port), ti->sa_family, ti->type);
+ goto unlock;
+ }
+
+ err = vnic_dev_overlay_offload_ctrl(enic->vdev, OVERLAY_FEATURE_VXLAN,
+ OVERLAY_OFFLOAD_DISABLE);
+ if (err) {
+ netdev_err(netdev, "vxlan: del offload udp port: %d failed",
+ ntohs(ti->port));
+ goto unlock;
+ }
+
+ enic->vxlan.vxlan_udp_port_number = 0;
+
+ netdev_info(netdev, "vxlan: del offload udp port %d, family %d\n",
+ ntohs(ti->port), ti->sa_family);
+
+unlock:
+ spin_unlock_bh(&enic->devcmd_lock);
+}
+
+static netdev_features_t enic_features_check(struct sk_buff *skb,
+ struct net_device *dev,
+ netdev_features_t features)
+{
+ const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb);
+ struct enic *enic = netdev_priv(dev);
+ struct udphdr *udph;
+ u16 port = 0;
+ u16 proto;
+
+ if (!skb->encapsulation)
+ return features;
+
+ features = vxlan_features_check(skb, features);
+
+ /* hardware only supports IPv4 vxlan tunnel */
+ if (vlan_get_protocol(skb) != htons(ETH_P_IP))
+ goto out;
+
+ /* hardware does not support offload of ipv6 inner pkt */
+ if (eth->h_proto != ntohs(ETH_P_IP))
+ goto out;
+
+ proto = ip_hdr(skb)->protocol;
+
+ if (proto == IPPROTO_UDP) {
+ udph = udp_hdr(skb);
+ port = be16_to_cpu(udph->dest);
+ }
+
+ /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK
+ * for other UDP port tunnels
+ */
+ if (port != enic->vxlan.vxlan_udp_port_number)
+ goto out;
+
+ return features;
+
+out:
+ return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
+}
+
int enic_is_dynamic(struct enic *enic)
{
return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
@@ -504,20 +633,19 @@ static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
return err;
}
-static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
- struct sk_buff *skb, unsigned int mss,
- int vlan_tag_insert, unsigned int vlan_tag,
- int loopback)
+static void enic_preload_tcp_csum_encap(struct sk_buff *skb)
{
- unsigned int frag_len_left = skb_headlen(skb);
- unsigned int len_left = skb->len - frag_len_left;
- unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
- int eop = (len_left == 0);
- unsigned int len;
- dma_addr_t dma_addr;
- unsigned int offset = 0;
- skb_frag_t *frag;
+ if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
+ inner_ip_hdr(skb)->check = 0;
+ inner_tcp_hdr(skb)->check =
+ ~csum_tcpudp_magic(inner_ip_hdr(skb)->saddr,
+ inner_ip_hdr(skb)->daddr, 0,
+ IPPROTO_TCP, 0);
+ }
+}
+static void enic_preload_tcp_csum(struct sk_buff *skb)
+{
/* Preload TCP csum field with IP pseudo hdr calculated
* with IP length set to zero. HW will later add in length
* to each TCP segment resulting from the TSO.
@@ -531,6 +659,30 @@ static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
}
+}
+
+static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
+ struct sk_buff *skb, unsigned int mss,
+ int vlan_tag_insert, unsigned int vlan_tag,
+ int loopback)
+{
+ unsigned int frag_len_left = skb_headlen(skb);
+ unsigned int len_left = skb->len - frag_len_left;
+ int eop = (len_left == 0);
+ unsigned int offset = 0;
+ unsigned int hdr_len;
+ dma_addr_t dma_addr;
+ unsigned int len;
+ skb_frag_t *frag;
+
+ if (skb->encapsulation) {
+ hdr_len = skb_inner_transport_header(skb) - skb->data;
+ hdr_len += inner_tcp_hdrlen(skb);
+ enic_preload_tcp_csum_encap(skb);
+ } else {
+ hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
+ enic_preload_tcp_csum(skb);
+ }
/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
* for the main skb fragment
@@ -579,6 +731,38 @@ static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
return 0;
}
+static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq,
+ struct sk_buff *skb,
+ int vlan_tag_insert,
+ unsigned int vlan_tag, int loopback)
+{
+ unsigned int head_len = skb_headlen(skb);
+ unsigned int len_left = skb->len - head_len;
+ /* Hardware will overwrite the checksum fields, calculating from
+ * scratch and ignoring the value placed by software.
+ * Offload mode = 00
+ * mss[2], mss[1], mss[0] bits are set
+ */
+ unsigned int mss_or_csum = 7;
+ int eop = (len_left == 0);
+ dma_addr_t dma_addr;
+ int err = 0;
+
+ dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
+ PCI_DMA_TODEVICE);
+ if (unlikely(enic_dma_map_check(enic, dma_addr)))
+ return -ENOMEM;
+
+ enic_queue_wq_desc_ex(wq, skb, dma_addr, head_len, mss_or_csum, 0,
+ vlan_tag_insert, vlan_tag,
+ WQ_ENET_OFFLOAD_MODE_CSUM, eop, 1 /* SOP */, eop,
+ loopback);
+ if (!eop)
+ err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
+
+ return err;
+}
+
static inline void enic_queue_wq_skb(struct enic *enic,
struct vnic_wq *wq, struct sk_buff *skb)
{
@@ -601,6 +785,9 @@ static inline void enic_queue_wq_skb(struct enic *enic,
err = enic_queue_wq_skb_tso(enic, wq, skb, mss,
vlan_tag_insert, vlan_tag,
loopback);
+ else if (skb->encapsulation)
+ err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert,
+ vlan_tag, loopback);
else if (skb->ip_summed == CHECKSUM_PARTIAL)
err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert,
vlan_tag, loopback);
@@ -1113,6 +1300,7 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
u8 packet_error;
u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
u32 rss_hash;
+ bool outer_csum_ok = true, encap = false;
if (skipped)
return;
@@ -1161,7 +1349,8 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
skb_put(skb, bytes_written);
skb->protocol = eth_type_trans(skb, netdev);
skb_record_rx_queue(skb, q_number);
- if (netdev->features & NETIF_F_RXHASH) {
+ if ((netdev->features & NETIF_F_RXHASH) && rss_hash &&
+ (type == 3)) {
switch (rss_type) {
case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4:
case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6:
@@ -1175,15 +1364,39 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
break;
}
}
+ if (enic->vxlan.vxlan_udp_port_number) {
+ switch (enic->vxlan.patch_level) {
+ case 0:
+ if (fcoe) {
+ encap = true;
+ outer_csum_ok = fcoe_fc_crc_ok;
+ }
+ break;
+ case 2:
+ if ((type == 7) &&
+ (rss_hash & BIT(0))) {
+ encap = true;
+ outer_csum_ok = (rss_hash & BIT(1)) &&
+ (rss_hash & BIT(2));
+ }
+ break;
+ }
+ }
/* Hardware does not provide whole packet checksum. It only
* provides pseudo checksum. Since hw validates the packet
* checksum but not provide us the checksum value. use
* CHECSUM_UNNECESSARY.
+ *
+ * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is
+ * inner csum_ok. outer_csum_ok is set by hw when outer udp
+ * csum is correct or is zero.
*/
- if ((netdev->features & NETIF_F_RXCSUM) && tcp_udp_csum_ok &&
- ipv4_csum_ok)
+ if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc &&
+ tcp_udp_csum_ok && ipv4_csum_ok && outer_csum_ok) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
+ skb->csum_level = encap;
+ }
if (vlan_stripped)
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
@@ -2285,6 +2498,9 @@ static const struct net_device_ops enic_netdev_dynamic_ops = {
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = enic_rx_flow_steer,
#endif
+ .ndo_udp_tunnel_add = enic_udp_tunnel_add,
+ .ndo_udp_tunnel_del = enic_udp_tunnel_del,
+ .ndo_features_check = enic_features_check,
};
static const struct net_device_ops enic_netdev_ops = {
@@ -2308,6 +2524,9 @@ static const struct net_device_ops enic_netdev_ops = {
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = enic_rx_flow_steer,
#endif
+ .ndo_udp_tunnel_add = enic_udp_tunnel_add,
+ .ndo_udp_tunnel_del = enic_udp_tunnel_del,
+ .ndo_features_check = enic_features_check,
};
static void enic_dev_deinit(struct enic *enic)
@@ -2683,6 +2902,39 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
netdev->hw_features |= NETIF_F_RXHASH;
if (ENIC_SETTING(enic, RXCSUM))
netdev->hw_features |= NETIF_F_RXCSUM;
+ if (ENIC_SETTING(enic, VXLAN)) {
+ u64 patch_level;
+
+ netdev->hw_enc_features |= NETIF_F_RXCSUM |
+ NETIF_F_TSO |
+ NETIF_F_TSO_ECN |
+ NETIF_F_GSO_UDP_TUNNEL |
+ NETIF_F_HW_CSUM |
+ NETIF_F_GSO_UDP_TUNNEL_CSUM;
+ netdev->hw_features |= netdev->hw_enc_features;
+ /* get bit mask from hw about supported offload bit level
+ * BIT(0) = fw supports patch_level 0
+ * fcoe bit = encap
+ * fcoe_fc_crc_ok = outer csum ok
+ * BIT(1) = always set by fw
+ * BIT(2) = fw supports patch_level 2
+ * BIT(0) in rss_hash = encap
+ * BIT(1,2) in rss_hash = outer_ip_csum_ok/
+ * outer_tcp_csum_ok
+ * used in enic_rq_indicate_buf
+ */
+ err = vnic_dev_get_supported_feature_ver(enic->vdev,
+ VIC_FEATURE_VXLAN,
+ &patch_level);
+ if (err)
+ patch_level = 0;
+ /* mask bits that are supported by driver
+ */
+ patch_level &= BIT_ULL(0) | BIT_ULL(2);
+ patch_level = fls(patch_level);
+ patch_level = patch_level ? patch_level - 1 : 0;
+ enic->vxlan.patch_level = patch_level;
+ }
netdev->features |= netdev->hw_features;
netdev->vlan_features |= netdev->features;
diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.c b/drivers/net/ethernet/cisco/enic/vnic_dev.c
index 8f27df3207bc..1841ad45d215 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_dev.c
+++ b/drivers/net/ethernet/cisco/enic/vnic_dev.c
@@ -1247,3 +1247,37 @@ int vnic_dev_classifier(struct vnic_dev *vdev, u8 cmd, u16 *entry,
return ret;
}
+
+int vnic_dev_overlay_offload_ctrl(struct vnic_dev *vdev, u8 overlay, u8 config)
+{
+ u64 a0 = overlay;
+ u64 a1 = config;
+ int wait = 1000;
+
+ return vnic_dev_cmd(vdev, CMD_OVERLAY_OFFLOAD_CTRL, &a0, &a1, wait);
+}
+
+int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
+ u16 vxlan_udp_port_number)
+{
+ u64 a1 = vxlan_udp_port_number;
+ u64 a0 = overlay;
+ int wait = 1000;
+
+ return vnic_dev_cmd(vdev, CMD_OVERLAY_OFFLOAD_CFG, &a0, &a1, wait);
+}
+
+int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
+ u64 *supported_versions)
+{
+ u64 a0 = feature;
+ int wait = 1000;
+ u64 a1 = 0;
+ int ret;
+
+ ret = vnic_dev_cmd(vdev, CMD_GET_SUPP_FEATURE_VER, &a0, &a1, wait);
+ if (!ret)
+ *supported_versions = a0;
+
+ return ret;
+}
diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.h b/drivers/net/ethernet/cisco/enic/vnic_dev.h
index 54156c484424..9d43d6bb9907 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_dev.h
+++ b/drivers/net/ethernet/cisco/enic/vnic_dev.h
@@ -179,5 +179,10 @@ int vnic_dev_set_mac_addr(struct vnic_dev *vdev, u8 *mac_addr);
int vnic_dev_classifier(struct vnic_dev *vdev, u8 cmd, u16 *entry,
struct filter *data);
int vnic_devcmd_init(struct vnic_dev *vdev);
+int vnic_dev_overlay_offload_ctrl(struct vnic_dev *vdev, u8 overlay, u8 config);
+int vnic_dev_overlay_offload_cfg(struct vnic_dev *vdev, u8 overlay,
+ u16 vxlan_udp_port_number);
+int vnic_dev_get_supported_feature_ver(struct vnic_dev *vdev, u8 feature,
+ u64 *supported_versions);
#endif /* _VNIC_DEV_H_ */
diff --git a/drivers/net/ethernet/cisco/enic/vnic_devcmd.h b/drivers/net/ethernet/cisco/enic/vnic_devcmd.h
index 2a812880b884..d83880b0d468 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_devcmd.h
+++ b/drivers/net/ethernet/cisco/enic/vnic_devcmd.h
@@ -406,6 +406,31 @@ enum vnic_devcmd_cmd {
* in: (u32) a0=Queue Pair number
*/
CMD_QP_STATS_CLEAR = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 63),
+
+ /* Use this devcmd for agreeing on the highest common version supported
+ * by both driver and fw for features who need such a facility.
+ * in: (u64) a0 = feature (driver requests for the supported versions
+ * on this feature)
+ * out: (u64) a0 = bitmap of all supported versions for that feature
+ */
+ CMD_GET_SUPP_FEATURE_VER = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ENET, 69),
+
+ /* Control (Enable/Disable) overlay offloads on the given vnic
+ * in: (u8) a0 = OVERLAY_FEATURE_NVGRE : NVGRE
+ * a0 = OVERLAY_FEATURE_VXLAN : VxLAN
+ * in: (u8) a1 = OVERLAY_OFFLOAD_ENABLE : Enable or
+ * a1 = OVERLAY_OFFLOAD_DISABLE : Disable or
+ * a1 = OVERLAY_OFFLOAD_ENABLE_V2 : Enable with version 2
+ */
+ CMD_OVERLAY_OFFLOAD_CTRL = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 72),
+
+ /* Configuration of overlay offloads feature on a given vNIC
+ * in: (u8) a0 = DEVCMD_OVERLAY_NVGRE : NVGRE
+ * a0 = DEVCMD_OVERLAY_VXLAN : VxLAN
+ * in: (u8) a1 = VXLAN_PORT_UPDATE : VxLAN
+ * in: (u16) a2 = unsigned short int port information
+ */
+ CMD_OVERLAY_OFFLOAD_CFG = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 73),
};
/* CMD_ENABLE2 flags */
@@ -657,4 +682,30 @@ struct devcmd2_result {
#define DEVCMD2_RING_SIZE 32
#define DEVCMD2_DESC_SIZE 128
+enum overlay_feature_t {
+ OVERLAY_FEATURE_NVGRE = 1,
+ OVERLAY_FEATURE_VXLAN,
+ OVERLAY_FEATURE_MAX,
+};
+
+enum overlay_ofld_cmd {
+ OVERLAY_OFFLOAD_ENABLE,
+ OVERLAY_OFFLOAD_DISABLE,
+ OVERLAY_OFFLOAD_ENABLE_P2,
+ OVERLAY_OFFLOAD_MAX,
+};
+
+#define OVERLAY_CFG_VXLAN_PORT_UPDATE 0
+
+/* Use this enum to get the supported versions for each of these features
+ * If you need to use the devcmd_get_supported_feature_version(), add
+ * the new feature into this enum and install function handler in devcmd.c
+ */
+enum vic_feature_t {
+ VIC_FEATURE_VXLAN,
+ VIC_FEATURE_RDMA,
+ VIC_FEATURE_VXLAN_PATCH,
+ VIC_FEATURE_MAX,
+};
+
#endif /* _VNIC_DEVCMD_H_ */
diff --git a/drivers/net/ethernet/cisco/enic/vnic_enet.h b/drivers/net/ethernet/cisco/enic/vnic_enet.h
index 75aced2de869..7d6fbb5635a4 100644
--- a/drivers/net/ethernet/cisco/enic/vnic_enet.h
+++ b/drivers/net/ethernet/cisco/enic/vnic_enet.h
@@ -48,6 +48,7 @@ struct vnic_enet_config {
#define VENETF_RSSHASH_IPV6_EX 0x200 /* Hash on IPv6 extended fields */
#define VENETF_RSSHASH_TCPIPV6_EX 0x400 /* Hash on TCP + IPv6 ext. fields */
#define VENETF_LOOP 0x800 /* Loopback enabled */
+#define VENETF_VXLAN 0x10000 /* VxLAN offload */
#define VENET_INTR_TYPE_MIN 0 /* Timer specs min interrupt spacing */
#define VENET_INTR_TYPE_IDLE 1 /* Timer specs idle time before irq */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 07:05:04 +0000