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numam-dpdk/drivers/net/enic/enic.h
Hyong Youb Kim 93fb21fdbe net/enic: enable overlay offload for VXLAN and GENEVE 
Recent NIC models support overlay offload. The overlay offload
feature enables the following on the NIC.
- Rx/Tx checksum offloads for both inner and outer packets.
- Rx inner packet type classification.
- TSO.
- Inner RSS.

TX descriptors do not require any changes, except the header length
for TSO. The NIC parses outer/inner packets and performs offloads on
them as necessary. The header length for tunneled TSO includes both
inner and outer headers.

The NIC actually parses and performs the above for NVGRE as well. DPDK
currently has no offload flags for NVGRE, and the hardware has no
controls to individually enable tunnel types either. So do nothing for
now.

The driver enables overlay offload by default. Add a devargs
'disable-overlay=<0|1>' to allow the app to disable it.

Also update the enic guide doc.

Signed-off-by: Hyong Youb Kim <hyonkim@cisco.com>
Reviewed-by: John Daley <johndale@cisco.com>
2018-04-27 15:54:55 +01:00

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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2008-2017 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*/
#ifndef _ENIC_H_
#define _ENIC_H_
#include "vnic_enet.h"
#include "vnic_dev.h"
#include "vnic_wq.h"
#include "vnic_rq.h"
#include "vnic_cq.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "vnic_nic.h"
#include "vnic_rss.h"
#include "enic_res.h"
#include "cq_enet_desc.h"
#include <stdbool.h>
#include <sys/queue.h>
#include <rte_spinlock.h>
#define DRV_NAME "enic_pmd"
#define DRV_DESCRIPTION "Cisco VIC Ethernet NIC Poll-mode Driver"
#define DRV_COPYRIGHT "Copyright 2008-2015 Cisco Systems, Inc"
#define ENIC_MAX_MAC_ADDR 64
#define VLAN_ETH_HLEN 18
#define ENICPMD_SETTING(enic, f) ((enic->config.flags & VENETF_##f) ? 1 : 0)
#define ENICPMD_BDF_LENGTH 13 /* 0000:00:00.0'\0' */
#define ENIC_CALC_IP_CKSUM 1
#define ENIC_CALC_TCP_UDP_CKSUM 2
#define ENIC_MAX_MTU 9000
#define ENIC_PAGE_SIZE 4096
#define PAGE_ROUND_UP(x) \
((((unsigned long)(x)) + ENIC_PAGE_SIZE-1) & (~(ENIC_PAGE_SIZE-1)))
#define ENICPMD_VFIO_PATH "/dev/vfio/vfio"
/*#define ENIC_DESC_COUNT_MAKE_ODD (x) do{if ((~(x)) & 1) { (x)--; } }while(0)*/
#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
#define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */
/* Special Filter id for non-specific packet flagging. Don't change value */
#define ENIC_MAGIC_FILTER_ID 0xffff
#define ENICPMD_FDIR_MAX 64
/*
* Interrupt 0: LSC and errors
* Interrupt 1: rx queue 0
* Interrupt 2: rx queue 1
* ...
*/
#define ENICPMD_LSC_INTR_OFFSET 0
#define ENICPMD_RXQ_INTR_OFFSET 1
struct enic_fdir_node {
struct rte_eth_fdir_filter filter;
u16 fltr_id;
u16 rq_index;
};
struct enic_fdir {
struct rte_eth_fdir_stats stats;
struct rte_hash *hash;
struct enic_fdir_node *nodes[ENICPMD_FDIR_MAX];
u32 modes;
u32 types_mask;
void (*copy_fltr_fn)(struct filter_v2 *filt,
struct rte_eth_fdir_input *input,
struct rte_eth_fdir_masks *masks);
};
struct enic_soft_stats {
rte_atomic64_t rx_nombuf;
rte_atomic64_t rx_packet_errors;
rte_atomic64_t tx_oversized;
};
struct enic_memzone_entry {
const struct rte_memzone *rz;
LIST_ENTRY(enic_memzone_entry) entries;
};
struct rte_flow {
LIST_ENTRY(rte_flow) next;
u16 enic_filter_id;
struct filter_v2 enic_filter;
};
/* Per-instance private data structure */
struct enic {
struct enic *next;
struct rte_pci_device *pdev;
struct vnic_enet_config config;
struct vnic_dev_bar bar0;
struct vnic_dev *vdev;
unsigned int port_id;
bool overlay_offload;
struct rte_eth_dev *rte_dev;
struct enic_fdir fdir;
char bdf_name[ENICPMD_BDF_LENGTH];
int dev_fd;
int iommu_group_fd;
int iommu_groupid;
int eventfd;
uint8_t mac_addr[ETH_ALEN];
pthread_t err_intr_thread;
int promisc;
int allmulti;
u8 ig_vlan_strip_en;
int link_status;
u8 hw_ip_checksum;
u16 max_mtu;
u8 adv_filters;
u32 flow_filter_mode;
u8 filter_actions; /* HW supported actions */
bool vxlan;
bool disable_overlay; /* devargs disable_overlay=1 */
unsigned int flags;
unsigned int priv_flags;
/* work queue (len = conf_wq_count) */
struct vnic_wq *wq;
unsigned int wq_count; /* equals eth_dev nb_tx_queues */
/* receive queue (len = conf_rq_count) */
struct vnic_rq *rq;
unsigned int rq_count; /* equals eth_dev nb_rx_queues */
/* completion queue (len = conf_cq_count) */
struct vnic_cq *cq;
unsigned int cq_count; /* equals rq_count + wq_count */
/* interrupt vectors (len = conf_intr_count) */
struct vnic_intr *intr;
unsigned int intr_count; /* equals enabled interrupts (lsc + rxqs) */
/* software counters */
struct enic_soft_stats soft_stats;
/* configured resources on vic */
unsigned int conf_rq_count;
unsigned int conf_wq_count;
unsigned int conf_cq_count;
unsigned int conf_intr_count;
/* linked list storing memory allocations */
LIST_HEAD(enic_memzone_list, enic_memzone_entry) memzone_list;
rte_spinlock_t memzone_list_lock;
rte_spinlock_t mtu_lock;
LIST_HEAD(enic_flows, rte_flow) flows;
rte_spinlock_t flows_lock;
/* RSS */
uint16_t reta_size;
uint8_t hash_key_size;
uint64_t flow_type_rss_offloads; /* 0 indicates RSS not supported */
/*
* Keep a copy of current RSS config for queries, as we cannot retrieve
* it from the NIC.
*/
uint8_t rss_hash_type; /* NIC_CFG_RSS_HASH_TYPE flags */
uint8_t rss_enable;
uint64_t rss_hf; /* ETH_RSS flags */
union vnic_rss_key rss_key;
union vnic_rss_cpu rss_cpu;
uint64_t rx_offload_capa; /* DEV_RX_OFFLOAD flags */
uint64_t tx_offload_capa; /* DEV_TX_OFFLOAD flags */
uint64_t tx_offload_mask; /* PKT_TX flags accepted */
};
/* Compute ethdev's max packet size from MTU */
static inline uint32_t enic_mtu_to_max_rx_pktlen(uint32_t mtu)
{
/* ethdev max size includes eth and crc whereas NIC MTU does not */
return mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
}
/* Get the CQ index from a Start of Packet(SOP) RQ index */
static inline unsigned int enic_sop_rq_idx_to_cq_idx(unsigned int sop_idx)
{
return sop_idx / 2;
}
/* Get the RTE RQ index from a Start of Packet(SOP) RQ index */
static inline unsigned int enic_sop_rq_idx_to_rte_idx(unsigned int sop_idx)
{
return sop_idx / 2;
}
/* Get the Start of Packet(SOP) RQ index from a RTE RQ index */
static inline unsigned int enic_rte_rq_idx_to_sop_idx(unsigned int rte_idx)
{
return rte_idx * 2;
}
/* Get the Data RQ index from a RTE RQ index */
static inline unsigned int enic_rte_rq_idx_to_data_idx(unsigned int rte_idx)
{
return rte_idx * 2 + 1;
}
static inline unsigned int enic_vnic_rq_count(struct enic *enic)
{
return enic->rq_count * 2;
}
static inline unsigned int enic_cq_rq(__rte_unused struct enic *enic, unsigned int rq)
{
/* Scatter rx uses two receive queues together with one
* completion queue, so the completion queue number is no
* longer the same as the rq number.
*/
return rq / 2;
}
static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
{
return enic->rq_count + wq;
}
static inline struct enic *pmd_priv(struct rte_eth_dev *eth_dev)
{
return (struct enic *)eth_dev->data->dev_private;
}
static inline uint32_t
enic_ring_add(uint32_t n_descriptors, uint32_t i0, uint32_t i1)
{
uint32_t d = i0 + i1;
d -= (d >= n_descriptors) ? n_descriptors : 0;
return d;
}
static inline uint32_t
enic_ring_sub(uint32_t n_descriptors, uint32_t i0, uint32_t i1)
{
int32_t d = i1 - i0;
return (uint32_t)((d < 0) ? ((int32_t)n_descriptors + d) : d);
}
static inline uint32_t
enic_ring_incr(uint32_t n_descriptors, uint32_t idx)
{
idx++;
if (unlikely(idx == n_descriptors))
idx = 0;
return idx;
}
void enic_fdir_stats_get(struct enic *enic,
struct rte_eth_fdir_stats *stats);
int enic_fdir_add_fltr(struct enic *enic,
struct rte_eth_fdir_filter *params);
int enic_fdir_del_fltr(struct enic *enic,
struct rte_eth_fdir_filter *params);
void enic_free_wq(void *txq);
int enic_alloc_intr_resources(struct enic *enic);
int enic_setup_finish(struct enic *enic);
int enic_alloc_wq(struct enic *enic, uint16_t queue_idx,
unsigned int socket_id, uint16_t nb_desc);
void enic_start_wq(struct enic *enic, uint16_t queue_idx);
int enic_stop_wq(struct enic *enic, uint16_t queue_idx);
void enic_start_rq(struct enic *enic, uint16_t queue_idx);
int enic_stop_rq(struct enic *enic, uint16_t queue_idx);
void enic_free_rq(void *rxq);
int enic_alloc_rq(struct enic *enic, uint16_t queue_idx,
unsigned int socket_id, struct rte_mempool *mp,
uint16_t nb_desc, uint16_t free_thresh);
int enic_set_vnic_res(struct enic *enic);
int enic_init_rss_nic_cfg(struct enic *enic);
int enic_set_rss_conf(struct enic *enic,
struct rte_eth_rss_conf *rss_conf);
int enic_set_rss_reta(struct enic *enic, union vnic_rss_cpu *rss_cpu);
int enic_set_vlan_strip(struct enic *enic);
int enic_enable(struct enic *enic);
int enic_disable(struct enic *enic);
void enic_remove(struct enic *enic);
int enic_get_link_status(struct enic *enic);
int enic_dev_stats_get(struct enic *enic,
struct rte_eth_stats *r_stats);
void enic_dev_stats_clear(struct enic *enic);
void enic_add_packet_filter(struct enic *enic);
int enic_set_mac_address(struct enic *enic, uint8_t *mac_addr);
int enic_del_mac_address(struct enic *enic, int mac_index);
unsigned int enic_cleanup_wq(struct enic *enic, struct vnic_wq *wq);
void enic_send_pkt(struct enic *enic, struct vnic_wq *wq,
struct rte_mbuf *tx_pkt, unsigned short len,
uint8_t sop, uint8_t eop, uint8_t cq_entry,
uint16_t ol_flags, uint16_t vlan_tag);
void enic_post_wq_index(struct vnic_wq *wq);
int enic_probe(struct enic *enic);
int enic_clsf_init(struct enic *enic);
void enic_clsf_destroy(struct enic *enic);
uint16_t enic_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
uint16_t nb_pkts);
uint16_t enic_dummy_recv_pkts(void *rx_queue,
struct rte_mbuf **rx_pkts,
uint16_t nb_pkts);
uint16_t enic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts);
uint16_t enic_prep_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
uint16_t nb_pkts);
int enic_set_mtu(struct enic *enic, uint16_t new_mtu);
int enic_link_update(struct enic *enic);
void enic_fdir_info(struct enic *enic);
void enic_fdir_info_get(struct enic *enic, struct rte_eth_fdir_info *stats);
void copy_fltr_v1(struct filter_v2 *fltr, struct rte_eth_fdir_input *input,
struct rte_eth_fdir_masks *masks);
void copy_fltr_v2(struct filter_v2 *fltr, struct rte_eth_fdir_input *input,
struct rte_eth_fdir_masks *masks);
extern const struct rte_flow_ops enic_flow_ops;
#endif /* _ENIC_H_ */
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