| /* SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause */ |
| |
| /* Header file for Gigabit Ethernet driver for Mellanox BlueField SoC |
| * - this file contains software data structures and any chip-specific |
| * data structures (e.g. TX WQE format) that are memory resident. |
| * |
| * Copyright (C) 2020-2021 NVIDIA CORPORATION & AFFILIATES |
| */ |
| |
| #ifndef __MLXBF_GIGE_H__ |
| #define __MLXBF_GIGE_H__ |
| |
| #include <linux/io-64-nonatomic-lo-hi.h> |
| #include <linux/irqreturn.h> |
| #include <linux/netdevice.h> |
| #include <linux/irq.h> |
| |
| /* The silicon design supports a maximum RX ring size of |
| * 32K entries. Based on current testing this maximum size |
| * is not required to be supported. Instead the RX ring |
| * will be capped at a realistic value of 1024 entries. |
| */ |
| #define MLXBF_GIGE_MIN_RXQ_SZ 32 |
| #define MLXBF_GIGE_MAX_RXQ_SZ 1024 |
| #define MLXBF_GIGE_DEFAULT_RXQ_SZ 128 |
| |
| #define MLXBF_GIGE_MIN_TXQ_SZ 4 |
| #define MLXBF_GIGE_MAX_TXQ_SZ 256 |
| #define MLXBF_GIGE_DEFAULT_TXQ_SZ 128 |
| |
| #define MLXBF_GIGE_DEFAULT_BUF_SZ 2048 |
| |
| #define MLXBF_GIGE_DMA_PAGE_SZ 4096 |
| #define MLXBF_GIGE_DMA_PAGE_SHIFT 12 |
| |
| /* There are four individual MAC RX filters. Currently |
| * two of them are being used: one for the broadcast MAC |
| * (index 0) and one for local MAC (index 1) |
| */ |
| #define MLXBF_GIGE_BCAST_MAC_FILTER_IDX 0 |
| #define MLXBF_GIGE_LOCAL_MAC_FILTER_IDX 1 |
| |
| /* Define for broadcast MAC literal */ |
| #define BCAST_MAC_ADDR 0xFFFFFFFFFFFF |
| |
| /* There are three individual interrupts: |
| * 1) Errors, "OOB" interrupt line |
| * 2) Receive Packet, "OOB_LLU" interrupt line |
| * 3) LLU and PLU Events, "OOB_PLU" interrupt line |
| */ |
| #define MLXBF_GIGE_ERROR_INTR_IDX 0 |
| #define MLXBF_GIGE_RECEIVE_PKT_INTR_IDX 1 |
| #define MLXBF_GIGE_LLU_PLU_INTR_IDX 2 |
| #define MLXBF_GIGE_PHY_INT_N 3 |
| |
| #define MLXBF_GIGE_MDIO_DEFAULT_PHY_ADDR 0x3 |
| |
| #define MLXBF_GIGE_DEFAULT_PHY_INT_GPIO 12 |
| |
| struct mlxbf_gige_stats { |
| u64 hw_access_errors; |
| u64 tx_invalid_checksums; |
| u64 tx_small_frames; |
| u64 tx_index_errors; |
| u64 sw_config_errors; |
| u64 sw_access_errors; |
| u64 rx_truncate_errors; |
| u64 rx_mac_errors; |
| u64 rx_din_dropped_pkts; |
| u64 tx_fifo_full; |
| u64 rx_filter_passed_pkts; |
| u64 rx_filter_discard_pkts; |
| }; |
| |
| struct mlxbf_gige { |
| void __iomem *base; |
| void __iomem *llu_base; |
| void __iomem *plu_base; |
| struct device *dev; |
| struct net_device *netdev; |
| struct platform_device *pdev; |
| void __iomem *mdio_io; |
| struct mii_bus *mdiobus; |
| void __iomem *gpio_io; |
| struct irq_domain *irqdomain; |
| u32 phy_int_gpio_mask; |
| spinlock_t lock; /* for packet processing indices */ |
| spinlock_t gpio_lock; /* for GPIO bus access */ |
| u16 rx_q_entries; |
| u16 tx_q_entries; |
| u64 *tx_wqe_base; |
| dma_addr_t tx_wqe_base_dma; |
| u64 *tx_wqe_next; |
| u64 *tx_cc; |
| dma_addr_t tx_cc_dma; |
| dma_addr_t *rx_wqe_base; |
| dma_addr_t rx_wqe_base_dma; |
| u64 *rx_cqe_base; |
| dma_addr_t rx_cqe_base_dma; |
| u16 tx_pi; |
| u16 prev_tx_ci; |
| u64 error_intr_count; |
| u64 rx_intr_count; |
| u64 llu_plu_intr_count; |
| struct sk_buff *rx_skb[MLXBF_GIGE_MAX_RXQ_SZ]; |
| struct sk_buff *tx_skb[MLXBF_GIGE_MAX_TXQ_SZ]; |
| int error_irq; |
| int rx_irq; |
| int llu_plu_irq; |
| int phy_irq; |
| int hw_phy_irq; |
| bool promisc_enabled; |
| u8 valid_polarity; |
| struct napi_struct napi; |
| struct mlxbf_gige_stats stats; |
| }; |
| |
| /* Rx Work Queue Element definitions */ |
| #define MLXBF_GIGE_RX_WQE_SZ 8 |
| |
| /* Rx Completion Queue Element definitions */ |
| #define MLXBF_GIGE_RX_CQE_SZ 8 |
| #define MLXBF_GIGE_RX_CQE_PKT_LEN_MASK GENMASK(10, 0) |
| #define MLXBF_GIGE_RX_CQE_VALID_MASK GENMASK(11, 11) |
| #define MLXBF_GIGE_RX_CQE_PKT_STATUS_MASK GENMASK(15, 12) |
| #define MLXBF_GIGE_RX_CQE_PKT_STATUS_MAC_ERR GENMASK(12, 12) |
| #define MLXBF_GIGE_RX_CQE_PKT_STATUS_TRUNCATED GENMASK(13, 13) |
| #define MLXBF_GIGE_RX_CQE_CHKSUM_MASK GENMASK(31, 16) |
| |
| /* Tx Work Queue Element definitions */ |
| #define MLXBF_GIGE_TX_WQE_SZ_QWORDS 2 |
| #define MLXBF_GIGE_TX_WQE_SZ 16 |
| #define MLXBF_GIGE_TX_WQE_PKT_LEN_MASK GENMASK(10, 0) |
| #define MLXBF_GIGE_TX_WQE_UPDATE_MASK GENMASK(31, 31) |
| #define MLXBF_GIGE_TX_WQE_CHKSUM_LEN_MASK GENMASK(42, 32) |
| #define MLXBF_GIGE_TX_WQE_CHKSUM_START_MASK GENMASK(55, 48) |
| #define MLXBF_GIGE_TX_WQE_CHKSUM_OFFSET_MASK GENMASK(63, 56) |
| |
| /* Macro to return packet length of specified TX WQE */ |
| #define MLXBF_GIGE_TX_WQE_PKT_LEN(tx_wqe_addr) \ |
| (*((tx_wqe_addr) + 1) & MLXBF_GIGE_TX_WQE_PKT_LEN_MASK) |
| |
| /* Tx Completion Count */ |
| #define MLXBF_GIGE_TX_CC_SZ 8 |
| |
| /* List of resources in ACPI table */ |
| enum mlxbf_gige_res { |
| MLXBF_GIGE_RES_MAC, |
| MLXBF_GIGE_RES_MDIO9, |
| MLXBF_GIGE_RES_GPIO0, |
| MLXBF_GIGE_RES_LLU, |
| MLXBF_GIGE_RES_PLU |
| }; |
| |
| /* Version of register data returned by mlxbf_gige_get_regs() */ |
| #define MLXBF_GIGE_REGS_VERSION 1 |
| |
| int mlxbf_gige_mdio_probe(struct platform_device *pdev, |
| struct mlxbf_gige *priv); |
| void mlxbf_gige_mdio_remove(struct mlxbf_gige *priv); |
| irqreturn_t mlxbf_gige_mdio_handle_phy_interrupt(int irq, void *dev_id); |
| void mlxbf_gige_mdio_enable_phy_int(struct mlxbf_gige *priv); |
| |
| void mlxbf_gige_set_mac_rx_filter(struct mlxbf_gige *priv, |
| unsigned int index, u64 dmac); |
| void mlxbf_gige_get_mac_rx_filter(struct mlxbf_gige *priv, |
| unsigned int index, u64 *dmac); |
| void mlxbf_gige_enable_promisc(struct mlxbf_gige *priv); |
| void mlxbf_gige_disable_promisc(struct mlxbf_gige *priv); |
| int mlxbf_gige_rx_init(struct mlxbf_gige *priv); |
| void mlxbf_gige_rx_deinit(struct mlxbf_gige *priv); |
| int mlxbf_gige_tx_init(struct mlxbf_gige *priv); |
| void mlxbf_gige_tx_deinit(struct mlxbf_gige *priv); |
| bool mlxbf_gige_handle_tx_complete(struct mlxbf_gige *priv); |
| netdev_tx_t mlxbf_gige_start_xmit(struct sk_buff *skb, |
| struct net_device *netdev); |
| struct sk_buff *mlxbf_gige_alloc_skb(struct mlxbf_gige *priv, |
| unsigned int map_len, |
| dma_addr_t *buf_dma, |
| enum dma_data_direction dir); |
| int mlxbf_gige_request_irqs(struct mlxbf_gige *priv); |
| void mlxbf_gige_free_irqs(struct mlxbf_gige *priv); |
| int mlxbf_gige_poll(struct napi_struct *napi, int budget); |
| extern const struct ethtool_ops mlxbf_gige_ethtool_ops; |
| void mlxbf_gige_update_tx_wqe_next(struct mlxbf_gige *priv); |
| |
| int mlxbf_gige_gpio_init(struct platform_device *pdev, struct mlxbf_gige *priv); |
| void mlxbf_gige_gpio_free(struct mlxbf_gige *priv); |
| |
| #endif /* !defined(__MLXBF_GIGE_H__) */ |
