diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_net.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net.h | 984 |
1 files changed, 984 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h new file mode 100644 index 000000000..a101ff30a --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -0,0 +1,984 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/* Copyright (C) 2015-2018 Netronome Systems, Inc. */ + +/* + * nfp_net.h + * Declarations for Netronome network device driver. + * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> + * Jason McMullan <jason.mcmullan@netronome.com> + * Rolf Neugebauer <rolf.neugebauer@netronome.com> + */ + +#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/dim.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); \ + } \ + }) + +/* Max time to wait for NFP to respond on updates (in seconds) */ +#define NFP_NET_POLL_TIMEOUT 5 + +/* Interval for reading offloaded filter stats */ +#define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100) + +/* Bar allocation */ +#define NFP_NET_CTRL_BAR 0 +#define NFP_NET_Q0_BAR 2 +#define NFP_NET_Q1_BAR 4 /* OBSOLETE */ + +/* Default size for MTU and freelist buffer sizes */ +#define NFP_NET_DEFAULT_MTU 1500U + +/* Maximum number of bytes prepended to a packet */ +#define NFP_NET_MAX_PREPEND 64 + +/* Interrupt definitions */ +#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) + +/* Queue/Ring definitions */ +#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_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 */ + +/* Offload definitions */ +#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))) + +/* Forward declarations */ +struct nfp_cpp; +struct nfp_dev_info; +struct nfp_dp_ops; +struct nfp_eth_table_port; +struct nfp_net; +struct nfp_net_r_vector; +struct nfp_port; +struct xsk_buff_pool; + +struct nfp_nfd3_tx_desc; +struct nfp_nfd3_tx_buf; + +struct nfp_nfdk_tx_desc; +struct nfp_nfdk_tx_buf; + +/* Convenience macro for wrapping descriptor index on ring size */ +#define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1)) + +/* Convenience macro for writing dma address into RX/TX descriptors */ +#define nfp_desc_set_dma_addr_40b(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 nfp_desc_set_dma_addr_48b(desc, dma_addr) \ + do { \ + __typeof__(desc) __d = (desc); \ + dma_addr_t __addr = (dma_addr); \ + \ + __d->dma_addr_hi = cpu_to_le16(upper_32_bits(__addr)); \ + __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ + } while (0) + +/** + * struct nfp_net_tx_ring - TX ring structure + * @r_vec: Back pointer to ring vector structure + * @idx: Ring index from Linux's perspective + * @data_pending: number of bytes added to current block (NFDK only) + * @qcp_q: Pointer to base of the QCP TX queue + * @txrwb: TX pointer write back area + * @cnt: Size of the queue in number of descriptors + * @wr_p: TX ring write pointer (free running) + * @rd_p: TX ring read pointer (free running) + * @qcp_rd_p: Local copy of QCP TX queue read pointer + * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer + * (used for .xmit_more delayed kick) + * @txbufs: Array of transmitted TX buffers, to free on transmit (NFD3) + * @ktxbufs: Array of transmitted TX buffers, to free on transmit (NFDK) + * @txds: Virtual address of TX ring in host memory (NFD3) + * @ktxds: Virtual address of TX ring in host memory (NFDK) + * + * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue + * @dma: DMA address of the TX ring + * @size: Size, in bytes, of the TX ring (needed to free) + * @is_xdp: Is this a XDP TX ring? + */ +struct nfp_net_tx_ring { + struct nfp_net_r_vector *r_vec; + + u16 idx; + u16 data_pending; + u8 __iomem *qcp_q; + u64 *txrwb; + + u32 cnt; + u32 wr_p; + u32 rd_p; + u32 qcp_rd_p; + + u32 wr_ptr_add; + + union { + struct nfp_nfd3_tx_buf *txbufs; + struct nfp_nfdk_tx_buf *ktxbufs; + }; + union { + struct nfp_nfd3_tx_desc *txds; + struct nfp_nfdk_tx_desc *ktxds; + }; + + /* Cold data follows */ + int qcidx; + + dma_addr_t dma; + size_t size; + bool is_xdp; +} ____cacheline_aligned; + +/* RX and freelist descriptor format */ + +#define PCIE_DESC_RX_DD BIT(7) +#define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) + +/* Flags in the RX descriptor */ +#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 { + __le16 dma_addr_hi; /* High bits of the buf address */ + u8 reserved; /* Must be zero */ + u8 meta_len_dd; /* Must be zero */ + + __le32 dma_addr_lo; /* Low bits of the buffer address */ + } __packed fld; + + struct { + __le16 data_len; /* Length of the frame + meta data */ + u8 reserved; + u8 meta_len_dd; /* Length of meta data prepended + + * descriptor done flag. + */ + + __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ + __le16 vlan; /* VLAN if stripped */ + } __packed rxd; + + __le32 vals[2]; + }; +}; + +#define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0) +#define NFP_NET_VLAN_CTAG 0 +#define NFP_NET_VLAN_STAG 1 + +struct nfp_meta_parsed { + u8 hash_type; + u8 csum_type; + u32 hash; + u32 mark; + u32 portid; + __wsum csum; + struct { + bool stripped; + u8 tpid; + u16 tci; + } vlan; +}; + +struct nfp_net_rx_hash { + __be32 hash_type; + __be32 hash; +}; + +/** + * struct nfp_net_rx_buf - software RX buffer descriptor + * @frag: page fragment buffer + * @dma_addr: DMA mapping address of the buffer + */ +struct nfp_net_rx_buf { + void *frag; + dma_addr_t dma_addr; +}; + +/** + * struct nfp_net_xsk_rx_buf - software RX XSK buffer descriptor + * @dma_addr: DMA mapping address of the buffer + * @xdp: XSK buffer pool handle (for AF_XDP) + */ +struct nfp_net_xsk_rx_buf { + dma_addr_t dma_addr; + struct xdp_buff *xdp; +}; + +/** + * struct nfp_net_rx_ring - RX ring structure + * @r_vec: Back pointer to ring vector structure + * @cnt: Size of the queue in number of descriptors + * @wr_p: FL/RX ring write pointer (free running) + * @rd_p: FL/RX ring read pointer (free running) + * @idx: Ring index from Linux's perspective + * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist + * @qcp_fl: Pointer to base of the QCP freelist queue + * @rxbufs: Array of transmitted FL/RX buffers + * @xsk_rxbufs: Array of transmitted FL/RX buffers (for AF_XDP) + * @rxds: Virtual address of FL/RX ring in host memory + * @xdp_rxq: RX-ring info avail for XDP + * @dma: DMA address of the FL/RX ring + * @size: Size, in bytes, of the FL/RX ring (needed to free) + */ +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_xsk_rx_buf *xsk_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 - Per ring interrupt vector configuration + * @nfp_net: Backpointer to nfp_net structure + * @napi: NAPI structure for this ring vec + * @tasklet: ctrl vNIC, tasklet for servicing the r_vec + * @queue: ctrl vNIC, send queue + * @lock: ctrl vNIC, r_vec lock protects @queue + * @tx_ring: Pointer to TX ring + * @rx_ring: Pointer to RX ring + * @xdp_ring: Pointer to an extra TX ring for XDP + * @xsk_pool: XSK buffer pool active on vector queue pair (for AF_XDP) + * @irq_entry: MSI-X table entry (use for talking to the device) + * @event_ctr: Number of interrupt + * @rx_dim: Dynamic interrupt moderation structure for RX + * @tx_dim: Dynamic interrupt moderation structure for TX + * @rx_sync: Seqlock for atomic updates of RX stats + * @rx_pkts: Number of received packets + * @rx_bytes: Number of received bytes + * @rx_drops: Number of packets dropped on RX due to lack of resources + * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK + * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK + * @hw_csum_rx_complete: Counter of packets with CHECKSUM_COMPLETE reported + * @hw_csum_rx_error: Counter of packets with bad checksums + * @hw_tls_rx: Number of packets with TLS decrypted by hardware + * @tx_sync: Seqlock for atomic updates of TX stats + * @tx_pkts: Number of Transmitted packets + * @tx_bytes: Number of Transmitted bytes + * @hw_csum_tx: Counter of packets with TX checksum offload requested + * @hw_csum_tx_inner: Counter of inner TX checksum offload requests + * @tx_gather: Counter of packets with Gather DMA + * @tx_lso: Counter of LSO packets sent + * @hw_tls_tx: Counter of TLS packets sent with crypto offloaded to HW + * @tls_tx_fallback: Counter of TLS packets sent which had to be encrypted + * by the fallback path because packets came out of order + * @tls_tx_no_fallback: Counter of TLS packets not sent because the fallback + * path could not encrypt them + * @tx_errors: How many TX errors were encountered + * @tx_busy: How often was TX busy (no space)? + * @rx_replace_buf_alloc_fail: Counter of RX buffer allocation failures + * @irq_vector: Interrupt vector number (use for talking to the OS) + * @handler: Interrupt handler for this ring vector + * @name: Name of the interrupt vector + * @affinity_mask: SMP affinity mask for this vector + * + * This structure ties RX and TX rings to interrupt vectors and a NAPI + * context. This currently only supports one RX and TX ring per + * interrupt vector but might be extended in the future to allow + * association of multiple rings per vector. + */ +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; + + u16 event_ctr; + struct dim rx_dim; + struct dim tx_dim; + + 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 xsk_buff_pool *xsk_pool; + + 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; + + /* Cold data follows */ + + u32 irq_vector; + irq_handler_t handler; + char name[IFNAMSIZ + 8]; + cpumask_t affinity_mask; +} ____cacheline_aligned; + +/* Firmware version as it is written in the 32bit value in the BAR */ +struct nfp_net_fw_version { + u8 minor; + u8 major; + u8 class; + + /* This byte can be exploited for more use, currently, + * BIT0: dp type, BIT[7:1]: reserved + */ + u8 extend; +} __packed; + +static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, + u8 extend, u8 class, u8 major, u8 minor) +{ + return fw_ver->extend == extend && + fw_ver->class == class && + fw_ver->major == major && + fw_ver->minor == minor; +} + +struct nfp_stat_pair { + u64 pkts; + u64 bytes; +}; + +/** + * struct nfp_net_dp - NFP network device datapath data structure + * @dev: Backpointer to struct device + * @netdev: Backpointer to net_device structure + * @is_vf: Is the driver attached to a VF? + * @chained_metadata_format: Firemware will use new metadata format + * @ktls_tx: Is kTLS TX enabled? + * @rx_dma_dir: Mapping direction for RX buffers + * @rx_dma_off: Offset at which DMA packets (for XDP headroom) + * @rx_offset: Offset in the RX buffers where packet data starts + * @ctrl: Local copy of the control register/word. + * @fl_bufsz: Currently configured size of the freelist buffers + * @xdp_prog: Installed XDP program + * @tx_rings: Array of pre-allocated TX ring structures + * @rx_rings: Array of pre-allocated RX ring structures + * @ctrl_bar: Pointer to mapped control BAR + * + * @ops: Callbacks and parameters for this vNIC's NFD version + * @txrwb: TX pointer write back area (indexed by queue id) + * @txrwb_dma: TX pointer write back area DMA address + * @txd_cnt: Size of the TX ring in number of min size packets + * @rxd_cnt: Size of the RX ring in number of min size packets + * @num_r_vecs: Number of used ring vectors + * @num_tx_rings: Currently configured number of TX rings + * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP) + * @num_rx_rings: Currently configured number of RX rings + * @mtu: Device MTU + * @xsk_pools: XSK buffer pools, @max_r_vecs in size (for AF_XDP). + */ +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; + + /* Cold data follows */ + + const struct nfp_dp_ops *ops; + + u64 *txrwb; + dma_addr_t txrwb_dma; + + 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 xsk_buff_pool **xsk_pools; +}; + +/** + * struct nfp_net - NFP network device structure + * @dp: Datapath structure + * @dev_info: NFP ASIC params + * @id: vNIC id within the PF (0 for VFs) + * @fw_ver: Firmware version + * @cap: Capabilities advertised by the Firmware + * @max_mtu: Maximum support MTU advertised by the Firmware + * @rss_hfunc: RSS selected hash function + * @rss_cfg: RSS configuration + * @rss_key: RSS secret key + * @rss_itbl: RSS indirection table + * @xdp: Information about the driver XDP program + * @xdp_hw: Information about the HW XDP program + * @max_r_vecs: Number of allocated interrupt vectors for RX/TX + * @max_tx_rings: Maximum number of TX rings supported by the Firmware + * @max_rx_rings: Maximum number of RX rings supported by the Firmware + * @stride_rx: Queue controller RX queue spacing + * @stride_tx: Queue controller TX queue spacing + * @r_vecs: Pre-allocated array of ring vectors + * @irq_entries: Pre-allocated array of MSI-X entries + * @lsc_handler: Handler for Link State Change interrupt + * @lsc_name: Name for Link State Change interrupt + * @exn_handler: Handler for Exception interrupt + * @exn_name: Name for Exception interrupt + * @shared_handler: Handler for shared interrupts + * @shared_name: Name for shared interrupt + * @reconfig_lock: Protects @reconfig_posted, @reconfig_timer_active, + * @reconfig_sync_present and HW reconfiguration request + * regs/machinery from async requests (sync must take + * @bar_lock) + * @reconfig_posted: Pending reconfig bits coming from async sources + * @reconfig_timer_active: Timer for reading reconfiguration results is pending + * @reconfig_sync_present: Some thread is performing synchronous reconfig + * @reconfig_timer: Timer for async reading of reconfig results + * @reconfig_in_progress_update: Update FW is processing now (debug only) + * @bar_lock: vNIC config BAR access lock, protects: update, + * mailbox area, crypto TLV + * @link_up: Is the link up? + * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading + * @rx_coalesce_adapt_on: Is RX interrupt moderation adaptive? + * @tx_coalesce_adapt_on: Is TX interrupt moderation adaptive? + * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter + * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter + * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter + * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter + * @qcp_cfg: Pointer to QCP queue used for configuration notification + * @tx_bar: Pointer to mapped TX queues + * @rx_bar: Pointer to mapped FL/RX queues + * @tlv_caps: Parsed TLV capabilities + * @ktls_tx_conn_cnt: Number of offloaded kTLS TX connections + * @ktls_rx_conn_cnt: Number of offloaded kTLS RX connections + * @ktls_conn_id_gen: Trivial generator for kTLS connection ids (for TX) + * @ktls_no_space: Counter of firmware rejecting kTLS connection due to + * lack of space + * @ktls_rx_resync_req: Counter of TLS RX resync requested + * @ktls_rx_resync_ign: Counter of TLS RX resync requests ignored + * @ktls_rx_resync_sent: Counter of TLS RX resync completed + * @mbox_cmsg: Common Control Message via vNIC mailbox state + * @mbox_cmsg.queue: CCM mbox queue of pending messages + * @mbox_cmsg.wq: CCM mbox wait queue of waiting processes + * @mbox_cmsg.workq: CCM mbox work queue for @wait_work and @runq_work + * @mbox_cmsg.wait_work: CCM mbox posted msg reconfig wait work + * @mbox_cmsg.runq_work: CCM mbox posted msg queue runner work + * @mbox_cmsg.tag: CCM mbox message tag allocator + * @debugfs_dir: Device directory in debugfs + * @vnic_list: Entry on device vNIC list + * @pdev: Backpointer to PCI device + * @app: APP handle if available + * @vnic_no_name: For non-port PF vNIC make ndo_get_phys_port_name return + * -EOPNOTSUPP to keep backwards compatibility (set by app) + * @port: Pointer to nfp_port structure if vNIC is a port + * @app_priv: APP private data for this vNIC + */ +struct nfp_net { + struct nfp_net_dp dp; + + const struct nfp_dev_info *dev_info; + 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]; + + 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; + + bool rx_coalesce_adapt_on; + bool tx_coalesce_adapt_on; + 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; +}; + +/* Functions to read/write from/to a BAR + * Performs any endian conversion necessary. + */ +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); +} + +/* Flush posted PCI writes by reading something without side effects */ +static inline void nn_pci_flush(struct nfp_net *nn) +{ + nn_readl(nn, NFP_NET_CFG_VERSION); +} + +/* Queue Controller Peripheral access functions and definitions. + * + * Some of the BARs of the NFP are mapped to portions of the Queue + * Controller Peripheral (QCP) address space on the NFP. A QCP queue + * has a read and a write pointer (as well as a size and flags, + * indicating overflow etc). The QCP offers a number of different + * operation on queue pointers, but here we only offer function to + * either add to a pointer or to read the pointer value. + */ +#define NFP_QCP_QUEUE_ADDR_SZ 0x800 +#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 + +/* nfp_qcp_ptr - Read or Write Pointer of a queue */ +enum nfp_qcp_ptr { + NFP_QCP_READ_PTR = 0, + NFP_QCP_WRITE_PTR +}; + +/** + * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + */ +static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) +{ + writel(val, q + NFP_QCP_QUEUE_ADD_RPTR); +} + +/** + * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue + * + * @q: Base address for queue structure + * @val: Value to add to the queue pointer + */ +static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) +{ + writel(val, q + NFP_QCP_QUEUE_ADD_WPTR); +} + +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; +} + +/** + * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_READ_PTR); +} + +/** + * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue + * @q: Base address for queue structure + * + * Return: Value read. + */ +static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) +{ + return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); +} + +u32 nfp_qcp_queue_offset(const struct nfp_dev_info *dev_info, u16 queue); + +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); +} + +/* Globals */ +extern const char nfp_driver_version[]; + +extern const struct net_device_ops nfp_nfd3_netdev_ops; +extern const struct net_device_ops nfp_nfdk_netdev_ops; + +static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev) +{ + return netdev->netdev_ops == &nfp_nfd3_netdev_ops || + netdev->netdev_ops == &nfp_nfdk_netdev_ops; +} + +static inline int nfp_net_coalesce_para_check(u32 usecs, u32 pkts) +{ + if ((usecs >= ((1 << 16) - 1)) || (pkts >= ((1 << 16) - 1))) + return -EINVAL; + + return 0; +} + +/* Prototypes */ +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, const struct nfp_dev_info *dev_info, + 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 sk_buff * +nfp_net_tls_tx(struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec, + struct sk_buff *skb, u64 *tls_handle, int *nr_frags); +void nfp_net_tls_tx_undo(struct sk_buff *skb, u64 tls_handle); + +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_ */ |