#ifndef _NFP_NET_H_
#define _NFP_NET_H_
#include <linux/atomic.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/io-64-nonatomic-hi-lo.h>
#include <linux/semaphore.h>
#include <linux/workqueue.h>
#include <net/xdp.h>
#include "nfp_net_ctrl.h"
#define nn_pr(nn, lvl, fmt, args...) \
({ \
struct nfp_net *__nn = (nn); \
\
if (__nn->dp.netdev) \
netdev_printk(lvl, __nn->dp.netdev, fmt, ## args); \
else \
dev_printk(lvl, __nn->dp.dev, "ctrl: " fmt, ## args); \
})
#define nn_err(nn, fmt, args...) nn_pr(nn, KERN_ERR, fmt, ## args)
#define nn_warn(nn, fmt, args...) nn_pr(nn, KERN_WARNING, fmt, ## args)
#define nn_info(nn, fmt, args...) nn_pr(nn, KERN_INFO, fmt, ## args)
#define nn_dbg(nn, fmt, args...) nn_pr(nn, KERN_DEBUG, fmt, ## args)
#define nn_dp_warn(dp, fmt, args...) \
({ \
struct nfp_net_dp *__dp = (dp); \
\
if (unlikely(net_ratelimit())) { \
if (__dp->netdev) \
netdev_warn(__dp->netdev, fmt, ## args); \
else \
dev_warn(__dp->dev, fmt, ## args); \
} \
})
#define NFP_NET_POLL_TIMEOUT 5
#define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100)
#define NFP_NET_CTRL_BAR 0
#define NFP_NET_Q0_BAR 2
#define NFP_NET_Q1_BAR 4 /* OBSOLETE */
#define NFP_NET_MAX_DMA_BITS 40
#define NFP_NET_DEFAULT_MTU 1500U
#define NFP_NET_MAX_PREPEND 64
#define NFP_NET_NON_Q_VECTORS 2
#define NFP_NET_IRQ_LSC_IDX 0
#define NFP_NET_IRQ_EXN_IDX 1
#define NFP_NET_MIN_VNIC_IRQS (NFP_NET_NON_Q_VECTORS + 1)
#define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */
#define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */
#define NFP_NET_MAX_R_VECS (NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \
NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS)
#define NFP_NET_MAX_IRQS (NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS)
#define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */
#define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */
#define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */
#define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */
#define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */
#define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */
#define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */
#define NFP_NET_XDP_MAX_COMPLETE 2048 /* XDP bufs to reclaim in NAPI poll */
#define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16))
#define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
#define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
struct nfp_cpp;
struct nfp_eth_table_port;
struct nfp_net;
struct nfp_net_r_vector;
struct nfp_port;
#define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1))
#define nfp_desc_set_dma_addr(desc, dma_addr) \
do { \
__typeof(desc) __d = (desc); \
dma_addr_t __addr = (dma_addr); \
\
__d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \
__d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \
} while (0)
#define PCIE_DESC_TX_EOP BIT(7)
#define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0)
#define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0)
#define PCIE_DESC_TX_CSUM BIT(7)
#define PCIE_DESC_TX_IP4_CSUM BIT(6)
#define PCIE_DESC_TX_TCP_CSUM BIT(5)
#define PCIE_DESC_TX_UDP_CSUM BIT(4)
#define PCIE_DESC_TX_VLAN BIT(3)
#define PCIE_DESC_TX_LSO BIT(2)
#define PCIE_DESC_TX_ENCAP BIT(1)
#define PCIE_DESC_TX_O_IP4_CSUM BIT(0)
struct nfp_net_tx_desc {
union {
struct {
u8 dma_addr_hi;
__le16 dma_len;
u8 offset_eop;
__le32 dma_addr_lo;
__le16 mss;
u8 lso_hdrlen;
u8 flags;
union {
struct {
u8 l3_offset;
u8 l4_offset;
};
__le16 vlan;
};
__le16 data_len;
} __packed;
__le32 vals[4];
__le64 vals8[2];
};
};
struct nfp_net_tx_buf {
union {
struct sk_buff *skb;
void *frag;
};
dma_addr_t dma_addr;
short int fidx;
u16 pkt_cnt;
u32 real_len;
};
struct nfp_net_tx_ring {
struct nfp_net_r_vector *r_vec;
u32 idx;
int qcidx;
u8 __iomem *qcp_q;
u32 cnt;
u32 wr_p;
u32 rd_p;
u32 qcp_rd_p;
u32 wr_ptr_add;
struct nfp_net_tx_buf *txbufs;
struct nfp_net_tx_desc *txds;
dma_addr_t dma;
size_t size;
bool is_xdp;
} ____cacheline_aligned;
#define PCIE_DESC_RX_DD BIT(7)
#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0)
#define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15))
#define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14))
#define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13))
#define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12))
#define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11))
#define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10))
#define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9))
#define PCIE_DESC_RX_DECRYPTED cpu_to_le16(BIT(8))
#define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7))
#define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6))
#define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5))
#define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4))
#define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3))
#define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2))
#define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1))
#define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0))
#define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \
PCIE_DESC_RX_TCP_CSUM | \
PCIE_DESC_RX_UDP_CSUM | \
PCIE_DESC_RX_I_IP4_CSUM | \
PCIE_DESC_RX_I_TCP_CSUM | \
PCIE_DESC_RX_I_UDP_CSUM)
#define PCIE_DESC_RX_CSUM_OK_SHIFT 1
#define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL)
#define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \
PCIE_DESC_RX_CSUM_OK_SHIFT)
struct nfp_net_rx_desc {
union {
struct {
u8 dma_addr_hi;
__le16 reserved;
u8 meta_len_dd;
__le32 dma_addr_lo;
} __packed fld;
struct {
__le16 data_len;
u8 reserved;
u8 meta_len_dd;
__le16 flags;
__le16 vlan;
} __packed rxd;
__le32 vals[2];
};
};
#define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0)
struct nfp_meta_parsed {
u8 hash_type;
u8 csum_type;
u32 hash;
u32 mark;
u32 portid;
__wsum csum;
};
struct nfp_net_rx_hash {
__be32 hash_type;
__be32 hash;
};
struct nfp_net_rx_buf {
void *frag;
dma_addr_t dma_addr;
};
struct nfp_net_rx_ring {
struct nfp_net_r_vector *r_vec;
u32 cnt;
u32 wr_p;
u32 rd_p;
u32 idx;
int fl_qcidx;
u8 __iomem *qcp_fl;
struct nfp_net_rx_buf *rxbufs;
struct nfp_net_rx_desc *rxds;
struct xdp_rxq_info xdp_rxq;
dma_addr_t dma;
size_t size;
} ____cacheline_aligned;
struct nfp_net_r_vector {
struct nfp_net *nfp_net;
union {
struct napi_struct napi;
struct {
struct tasklet_struct tasklet;
struct sk_buff_head queue;
spinlock_t lock;
};
};
struct nfp_net_tx_ring *tx_ring;
struct nfp_net_rx_ring *rx_ring;
u16 irq_entry;
struct u64_stats_sync rx_sync;
u64 rx_pkts;
u64 rx_bytes;
u64 rx_drops;
u64 hw_csum_rx_ok;
u64 hw_csum_rx_inner_ok;
u64 hw_csum_rx_complete;
u64 hw_tls_rx;
u64 hw_csum_rx_error;
u64 rx_replace_buf_alloc_fail;
struct nfp_net_tx_ring *xdp_ring;
struct u64_stats_sync tx_sync;
u64 tx_pkts;
u64 tx_bytes;
u64 ____cacheline_aligned_in_smp hw_csum_tx;
u64 hw_csum_tx_inner;
u64 tx_gather;
u64 tx_lso;
u64 hw_tls_tx;
u64 tls_tx_fallback;
u64 tls_tx_no_fallback;
u64 tx_errors;
u64 tx_busy;
u32 irq_vector;
irq_handler_t handler;
char name[IFNAMSIZ + 8];
cpumask_t affinity_mask;
} ____cacheline_aligned;
struct nfp_net_fw_version {
u8 minor;
u8 major;
u8 class;
u8 resv;
} __packed;
static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver,
u8 resv, u8 class, u8 major, u8 minor)
{
return fw_ver->resv == resv &&
fw_ver->class == class &&
fw_ver->major == major &&
fw_ver->minor == minor;
}
struct nfp_stat_pair {
u64 pkts;
u64 bytes;
};
struct nfp_net_dp {
struct device *dev;
struct net_device *netdev;
u8 is_vf:1;
u8 chained_metadata_format:1;
u8 ktls_tx:1;
u8 rx_dma_dir;
u8 rx_offset;
u32 rx_dma_off;
u32 ctrl;
u32 fl_bufsz;
struct bpf_prog *xdp_prog;
struct nfp_net_tx_ring *tx_rings;
struct nfp_net_rx_ring *rx_rings;
u8 __iomem *ctrl_bar;
unsigned int txd_cnt;
unsigned int rxd_cnt;
unsigned int num_r_vecs;
unsigned int num_tx_rings;
unsigned int num_stack_tx_rings;
unsigned int num_rx_rings;
unsigned int mtu;
};
struct nfp_net {
struct nfp_net_dp dp;
struct nfp_net_fw_version fw_ver;
u32 id;
u32 cap;
u32 max_mtu;
u8 rss_hfunc;
u32 rss_cfg;
u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ];
u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ];
struct xdp_attachment_info xdp;
struct xdp_attachment_info xdp_hw;
unsigned int max_tx_rings;
unsigned int max_rx_rings;
int stride_tx;
int stride_rx;
unsigned int max_r_vecs;
struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS];
struct msix_entry irq_entries[NFP_NET_MAX_IRQS];
irq_handler_t lsc_handler;
char lsc_name[IFNAMSIZ + 8];
irq_handler_t exn_handler;
char exn_name[IFNAMSIZ + 8];
irq_handler_t shared_handler;
char shared_name[IFNAMSIZ + 8];
u32 me_freq_mhz;
bool link_up;
spinlock_t link_status_lock;
spinlock_t reconfig_lock;
u32 reconfig_posted;
bool reconfig_timer_active;
bool reconfig_sync_present;
struct timer_list reconfig_timer;
u32 reconfig_in_progress_update;
struct semaphore bar_lock;
u32 rx_coalesce_usecs;
u32 rx_coalesce_max_frames;
u32 tx_coalesce_usecs;
u32 tx_coalesce_max_frames;
u8 __iomem *qcp_cfg;
u8 __iomem *tx_bar;
u8 __iomem *rx_bar;
struct nfp_net_tlv_caps tlv_caps;
unsigned int ktls_tx_conn_cnt;
unsigned int ktls_rx_conn_cnt;
atomic64_t ktls_conn_id_gen;
atomic_t ktls_no_space;
atomic_t ktls_rx_resync_req;
atomic_t ktls_rx_resync_ign;
atomic_t ktls_rx_resync_sent;
struct {
struct sk_buff_head queue;
wait_queue_head_t wq;
struct workqueue_struct *workq;
struct work_struct wait_work;
struct work_struct runq_work;
u16 tag;
} mbox_cmsg;
struct dentry *debugfs_dir;
struct list_head vnic_list;
struct pci_dev *pdev;
struct nfp_app *app;
bool vnic_no_name;
struct nfp_port *port;
void *app_priv;
};
static inline u16 nn_readb(struct nfp_net *nn, int off)
{
return readb(nn->dp.ctrl_bar + off);
}
static inline void nn_writeb(struct nfp_net *nn, int off, u8 val)
{
writeb(val, nn->dp.ctrl_bar + off);
}
static inline u16 nn_readw(struct nfp_net *nn, int off)
{
return readw(nn->dp.ctrl_bar + off);
}
static inline void nn_writew(struct nfp_net *nn, int off, u16 val)
{
writew(val, nn->dp.ctrl_bar + off);
}
static inline u32 nn_readl(struct nfp_net *nn, int off)
{
return readl(nn->dp.ctrl_bar + off);
}
static inline void nn_writel(struct nfp_net *nn, int off, u32 val)
{
writel(val, nn->dp.ctrl_bar + off);
}
static inline u64 nn_readq(struct nfp_net *nn, int off)
{
return readq(nn->dp.ctrl_bar + off);
}
static inline void nn_writeq(struct nfp_net *nn, int off, u64 val)
{
writeq(val, nn->dp.ctrl_bar + off);
}
static inline void nn_pci_flush(struct nfp_net *nn)
{
nn_readl(nn, NFP_NET_CFG_VERSION);
}
#define NFP_QCP_QUEUE_ADDR_SZ 0x800
#define NFP_QCP_QUEUE_AREA_SZ 0x80000
#define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ)
#define NFP_QCP_QUEUE_ADD_RPTR 0x0000
#define NFP_QCP_QUEUE_ADD_WPTR 0x0004
#define NFP_QCP_QUEUE_STS_LO 0x0008
#define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff
#define NFP_QCP_QUEUE_STS_HI 0x000c
#define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff
#define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff)))
enum nfp_qcp_ptr {
NFP_QCP_READ_PTR = 0,
NFP_QCP_WRITE_PTR
};
#define NFP_QCP_MAX_ADD 0x3f
static inline void _nfp_qcp_ptr_add(u8 __iomem *q,
enum nfp_qcp_ptr ptr, u32 val)
{
u32 off;
if (ptr == NFP_QCP_READ_PTR)
off = NFP_QCP_QUEUE_ADD_RPTR;
else
off = NFP_QCP_QUEUE_ADD_WPTR;
while (val > NFP_QCP_MAX_ADD) {
writel(NFP_QCP_MAX_ADD, q + off);
val -= NFP_QCP_MAX_ADD;
}
writel(val, q + off);
}
static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val)
{
_nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val);
}
static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val)
{
_nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val);
}
static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr)
{
u32 off;
u32 val;
if (ptr == NFP_QCP_READ_PTR)
off = NFP_QCP_QUEUE_STS_LO;
else
off = NFP_QCP_QUEUE_STS_HI;
val = readl(q + off);
if (ptr == NFP_QCP_READ_PTR)
return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask;
else
return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask;
}
static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q)
{
return _nfp_qcp_read(q, NFP_QCP_READ_PTR);
}
static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q)
{
return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR);
}
static inline bool nfp_net_is_data_vnic(struct nfp_net *nn)
{
WARN_ON_ONCE(!nn->dp.netdev && nn->port);
return !!nn->dp.netdev;
}
static inline bool nfp_net_running(struct nfp_net *nn)
{
return nn->dp.ctrl & NFP_NET_CFG_CTRL_ENABLE;
}
static inline const char *nfp_net_name(struct nfp_net *nn)
{
return nn->dp.netdev ? nn->dp.netdev->name : "ctrl";
}
static inline void nfp_ctrl_lock(struct nfp_net *nn)
__acquires(&nn->r_vecs[0].lock)
{
spin_lock_bh(&nn->r_vecs[0].lock);
}
static inline void nfp_ctrl_unlock(struct nfp_net *nn)
__releases(&nn->r_vecs[0].lock)
{
spin_unlock_bh(&nn->r_vecs[0].lock);
}
static inline void nn_ctrl_bar_lock(struct nfp_net *nn)
{
down(&nn->bar_lock);
}
static inline bool nn_ctrl_bar_trylock(struct nfp_net *nn)
{
return !down_trylock(&nn->bar_lock);
}
static inline void nn_ctrl_bar_unlock(struct nfp_net *nn)
{
up(&nn->bar_lock);
}
extern const char nfp_driver_version[];
extern const struct net_device_ops nfp_net_netdev_ops;
static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev)
{
return netdev->netdev_ops == &nfp_net_netdev_ops;
}
void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
void __iomem *ctrl_bar);
struct nfp_net *
nfp_net_alloc(struct pci_dev *pdev, void __iomem *ctrl_bar, bool needs_netdev,
unsigned int max_tx_rings, unsigned int max_rx_rings);
void nfp_net_free(struct nfp_net *nn);
int nfp_net_init(struct nfp_net *nn);
void nfp_net_clean(struct nfp_net *nn);
int nfp_ctrl_open(struct nfp_net *nn);
void nfp_ctrl_close(struct nfp_net *nn);
void nfp_net_set_ethtool_ops(struct net_device *netdev);
void nfp_net_info(struct nfp_net *nn);
int __nfp_net_reconfig(struct nfp_net *nn, u32 update);
int nfp_net_reconfig(struct nfp_net *nn, u32 update);
unsigned int nfp_net_rss_key_sz(struct nfp_net *nn);
void nfp_net_rss_write_itbl(struct nfp_net *nn);
void nfp_net_rss_write_key(struct nfp_net *nn);
void nfp_net_coalesce_write_cfg(struct nfp_net *nn);
int nfp_net_mbox_lock(struct nfp_net *nn, unsigned int data_size);
int nfp_net_mbox_reconfig(struct nfp_net *nn, u32 mbox_cmd);
int nfp_net_mbox_reconfig_and_unlock(struct nfp_net *nn, u32 mbox_cmd);
void nfp_net_mbox_reconfig_post(struct nfp_net *nn, u32 update);
int nfp_net_mbox_reconfig_wait_posted(struct nfp_net *nn);
unsigned int
nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
unsigned int min_irqs, unsigned int want_irqs);
void nfp_net_irqs_disable(struct pci_dev *pdev);
void
nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
unsigned int n);
struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn);
int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new,
struct netlink_ext_ack *extack);
#ifdef CONFIG_NFP_DEBUG
void nfp_net_debugfs_create(void);
void nfp_net_debugfs_destroy(void);
struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev);
void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir);
void nfp_net_debugfs_dir_clean(struct dentry **dir);
#else
static inline void nfp_net_debugfs_create(void)
{
}
static inline void nfp_net_debugfs_destroy(void)
{
}
static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
{
return NULL;
}
static inline void
nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir)
{
}
static inline void nfp_net_debugfs_dir_clean(struct dentry **dir)
{
}
#endif /* CONFIG_NFP_DEBUG */
#endif /* _NFP_NET_H_ */