diff options
Diffstat (limited to 'drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c')
| -rw-r--r-- | drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c new file mode 100644 index 000000000000..9b65eef62b3f --- /dev/null +++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c @@ -0,0 +1,328 @@ +// SPDX-License-Identifier: GPL-2.0+ +// Copyright (c) 2024 Hisilicon Limited. + +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/if_vlan.h> +#include <linux/iopoll.h> +#include <linux/minmax.h> +#include "hbg_common.h" +#include "hbg_hw.h" +#include "hbg_reg.h" + +#define HBG_HW_EVENT_WAIT_TIMEOUT_US (2 * 1000 * 1000) +#define HBG_HW_EVENT_WAIT_INTERVAL_US (10 * 1000) +/* little endian or big endian. + * ctrl means packet description, data means skb packet data + */ +#define HBG_ENDIAN_CTRL_LE_DATA_BE 0x0 +#define HBG_PCU_FRAME_LEN_PLUS 4 + +static bool hbg_hw_spec_is_valid(struct hbg_priv *priv) +{ + return hbg_reg_read(priv, HBG_REG_SPEC_VALID_ADDR) && + !hbg_reg_read(priv, HBG_REG_EVENT_REQ_ADDR); +} + +int hbg_hw_event_notify(struct hbg_priv *priv, + enum hbg_hw_event_type event_type) +{ + bool is_valid; + int ret; + + if (test_and_set_bit(HBG_NIC_STATE_EVENT_HANDLING, &priv->state)) + return -EBUSY; + + /* notify */ + hbg_reg_write(priv, HBG_REG_EVENT_REQ_ADDR, event_type); + + ret = read_poll_timeout(hbg_hw_spec_is_valid, is_valid, is_valid, + HBG_HW_EVENT_WAIT_INTERVAL_US, + HBG_HW_EVENT_WAIT_TIMEOUT_US, + HBG_HW_EVENT_WAIT_INTERVAL_US, priv); + + clear_bit(HBG_NIC_STATE_EVENT_HANDLING, &priv->state); + + if (ret) + dev_err(&priv->pdev->dev, + "event %d wait timeout\n", event_type); + + return ret; +} + +static int hbg_hw_dev_specs_init(struct hbg_priv *priv) +{ + struct hbg_dev_specs *specs = &priv->dev_specs; + u64 mac_addr; + + if (!hbg_hw_spec_is_valid(priv)) { + dev_err(&priv->pdev->dev, "dev_specs not init\n"); + return -EINVAL; + } + + specs->mac_id = hbg_reg_read(priv, HBG_REG_MAC_ID_ADDR); + specs->phy_addr = hbg_reg_read(priv, HBG_REG_PHY_ID_ADDR); + specs->mdio_frequency = hbg_reg_read(priv, HBG_REG_MDIO_FREQ_ADDR); + specs->max_mtu = hbg_reg_read(priv, HBG_REG_MAX_MTU_ADDR); + specs->min_mtu = hbg_reg_read(priv, HBG_REG_MIN_MTU_ADDR); + specs->vlan_layers = hbg_reg_read(priv, HBG_REG_VLAN_LAYERS_ADDR); + specs->rx_fifo_num = hbg_reg_read(priv, HBG_REG_RX_FIFO_NUM_ADDR); + specs->tx_fifo_num = hbg_reg_read(priv, HBG_REG_TX_FIFO_NUM_ADDR); + specs->uc_mac_num = hbg_reg_read(priv, HBG_REG_UC_MAC_NUM_ADDR); + + mac_addr = hbg_reg_read64(priv, HBG_REG_MAC_ADDR_ADDR); + u64_to_ether_addr(mac_addr, (u8 *)specs->mac_addr.sa_data); + + if (!is_valid_ether_addr((u8 *)specs->mac_addr.sa_data)) + return -EADDRNOTAVAIL; + + specs->max_frame_len = HBG_PCU_CACHE_LINE_SIZE + specs->max_mtu; + specs->rx_buf_size = HBG_PACKET_HEAD_SIZE + specs->max_frame_len; + return 0; +} + +u32 hbg_hw_get_irq_status(struct hbg_priv *priv) +{ + u32 status; + + status = hbg_reg_read(priv, HBG_REG_CF_INTRPT_STAT_ADDR); + + hbg_field_modify(status, HBG_INT_MSK_TX_B, + hbg_reg_read(priv, HBG_REG_CF_IND_TXINT_STAT_ADDR)); + hbg_field_modify(status, HBG_INT_MSK_RX_B, + hbg_reg_read(priv, HBG_REG_CF_IND_RXINT_STAT_ADDR)); + + return status; +} + +void hbg_hw_irq_clear(struct hbg_priv *priv, u32 mask) +{ + if (FIELD_GET(HBG_INT_MSK_TX_B, mask)) + return hbg_reg_write(priv, HBG_REG_CF_IND_TXINT_CLR_ADDR, 0x1); + + if (FIELD_GET(HBG_INT_MSK_RX_B, mask)) + return hbg_reg_write(priv, HBG_REG_CF_IND_RXINT_CLR_ADDR, 0x1); + + return hbg_reg_write(priv, HBG_REG_CF_INTRPT_CLR_ADDR, mask); +} + +bool hbg_hw_irq_is_enabled(struct hbg_priv *priv, u32 mask) +{ + if (FIELD_GET(HBG_INT_MSK_TX_B, mask)) + return hbg_reg_read(priv, HBG_REG_CF_IND_TXINT_MSK_ADDR); + + if (FIELD_GET(HBG_INT_MSK_RX_B, mask)) + return hbg_reg_read(priv, HBG_REG_CF_IND_RXINT_MSK_ADDR); + + return hbg_reg_read(priv, HBG_REG_CF_INTRPT_MSK_ADDR) & mask; +} + +void hbg_hw_irq_enable(struct hbg_priv *priv, u32 mask, bool enable) +{ + u32 value; + + if (FIELD_GET(HBG_INT_MSK_TX_B, mask)) + return hbg_reg_write(priv, + HBG_REG_CF_IND_TXINT_MSK_ADDR, enable); + + if (FIELD_GET(HBG_INT_MSK_RX_B, mask)) + return hbg_reg_write(priv, + HBG_REG_CF_IND_RXINT_MSK_ADDR, enable); + + value = hbg_reg_read(priv, HBG_REG_CF_INTRPT_MSK_ADDR); + if (enable) + value |= mask; + else + value &= ~mask; + + hbg_reg_write(priv, HBG_REG_CF_INTRPT_MSK_ADDR, value); +} + +void hbg_hw_set_uc_addr(struct hbg_priv *priv, u64 mac_addr, u32 index) +{ + u32 addr; + + /* mac addr is u64, so the addr offset is 0x8 */ + addr = HBG_REG_STATION_ADDR_LOW_2_ADDR + (index * 0x8); + hbg_reg_write64(priv, addr, mac_addr); +} + +static void hbg_hw_set_pcu_max_frame_len(struct hbg_priv *priv, + u16 max_frame_len) +{ + max_frame_len = max_t(u32, max_frame_len, ETH_DATA_LEN); + + /* lower two bits of value must be set to 0 */ + max_frame_len = round_up(max_frame_len, HBG_PCU_FRAME_LEN_PLUS); + + hbg_reg_write_field(priv, HBG_REG_MAX_FRAME_LEN_ADDR, + HBG_REG_MAX_FRAME_LEN_M, max_frame_len); +} + +static void hbg_hw_set_mac_max_frame_len(struct hbg_priv *priv, + u16 max_frame_size) +{ + hbg_reg_write_field(priv, HBG_REG_MAX_FRAME_SIZE_ADDR, + HBG_REG_MAX_FRAME_LEN_M, max_frame_size); +} + +void hbg_hw_set_mtu(struct hbg_priv *priv, u16 mtu) +{ + u32 frame_len; + + frame_len = mtu + VLAN_HLEN * priv->dev_specs.vlan_layers + + ETH_HLEN + ETH_FCS_LEN; + + hbg_hw_set_pcu_max_frame_len(priv, frame_len); + hbg_hw_set_mac_max_frame_len(priv, frame_len); +} + +void hbg_hw_mac_enable(struct hbg_priv *priv, u32 enable) +{ + hbg_reg_write_field(priv, HBG_REG_PORT_ENABLE_ADDR, + HBG_REG_PORT_ENABLE_TX_B, enable); + hbg_reg_write_field(priv, HBG_REG_PORT_ENABLE_ADDR, + HBG_REG_PORT_ENABLE_RX_B, enable); +} + +u32 hbg_hw_get_fifo_used_num(struct hbg_priv *priv, enum hbg_dir dir) +{ + if (dir & HBG_DIR_TX) + return hbg_reg_read_field(priv, HBG_REG_CF_CFF_DATA_NUM_ADDR, + HBG_REG_CF_CFF_DATA_NUM_ADDR_TX_M); + + if (dir & HBG_DIR_RX) + return hbg_reg_read_field(priv, HBG_REG_CF_CFF_DATA_NUM_ADDR, + HBG_REG_CF_CFF_DATA_NUM_ADDR_RX_M); + + return 0; +} + +void hbg_hw_set_tx_desc(struct hbg_priv *priv, struct hbg_tx_desc *tx_desc) +{ + hbg_reg_write(priv, HBG_REG_TX_CFF_ADDR_0_ADDR, tx_desc->word0); + hbg_reg_write(priv, HBG_REG_TX_CFF_ADDR_1_ADDR, tx_desc->word1); + hbg_reg_write(priv, HBG_REG_TX_CFF_ADDR_2_ADDR, tx_desc->word2); + hbg_reg_write(priv, HBG_REG_TX_CFF_ADDR_3_ADDR, tx_desc->word3); +} + +void hbg_hw_fill_buffer(struct hbg_priv *priv, u32 buffer_dma_addr) +{ + hbg_reg_write(priv, HBG_REG_RX_CFF_ADDR_ADDR, buffer_dma_addr); +} + +void hbg_hw_adjust_link(struct hbg_priv *priv, u32 speed, u32 duplex) +{ + hbg_hw_mac_enable(priv, HBG_STATUS_DISABLE); + + hbg_reg_write_field(priv, HBG_REG_PORT_MODE_ADDR, + HBG_REG_PORT_MODE_M, speed); + hbg_reg_write_field(priv, HBG_REG_DUPLEX_TYPE_ADDR, + HBG_REG_DUPLEX_B, duplex); + + hbg_hw_event_notify(priv, HBG_HW_EVENT_CORE_RESET); + + hbg_hw_mac_enable(priv, HBG_STATUS_ENABLE); + + if (!hbg_reg_read_field(priv, HBG_REG_AN_NEG_STATE_ADDR, + HBG_REG_AN_NEG_STATE_NP_LINK_OK_B)) + hbg_np_link_fail_task_schedule(priv); +} + +/* only support uc filter */ +void hbg_hw_set_mac_filter_enable(struct hbg_priv *priv, u32 enable) +{ + hbg_reg_write_field(priv, HBG_REG_REC_FILT_CTRL_ADDR, + HBG_REG_REC_FILT_CTRL_UC_MATCH_EN_B, enable); + + /* only uc filter is supported, so set all bits of mc mask reg to 1 */ + hbg_reg_write64(priv, HBG_REG_STATION_ADDR_LOW_MSK_0, U64_MAX); + hbg_reg_write64(priv, HBG_REG_STATION_ADDR_LOW_MSK_1, U64_MAX); +} + +void hbg_hw_set_pause_enable(struct hbg_priv *priv, u32 tx_en, u32 rx_en) +{ + hbg_reg_write_field(priv, HBG_REG_PAUSE_ENABLE_ADDR, + HBG_REG_PAUSE_ENABLE_TX_B, tx_en); + hbg_reg_write_field(priv, HBG_REG_PAUSE_ENABLE_ADDR, + HBG_REG_PAUSE_ENABLE_RX_B, rx_en); + + hbg_reg_write_field(priv, HBG_REG_REC_FILT_CTRL_ADDR, + HBG_REG_REC_FILT_CTRL_PAUSE_FRM_PASS_B, rx_en); +} + +void hbg_hw_get_pause_enable(struct hbg_priv *priv, u32 *tx_en, u32 *rx_en) +{ + *tx_en = hbg_reg_read_field(priv, HBG_REG_PAUSE_ENABLE_ADDR, + HBG_REG_PAUSE_ENABLE_TX_B); + *rx_en = hbg_reg_read_field(priv, HBG_REG_PAUSE_ENABLE_ADDR, + HBG_REG_PAUSE_ENABLE_RX_B); +} + +void hbg_hw_set_rx_pause_mac_addr(struct hbg_priv *priv, u64 mac_addr) +{ + hbg_reg_write64(priv, HBG_REG_FD_FC_ADDR_LOW_ADDR, mac_addr); +} + +static void hbg_hw_init_transmit_ctrl(struct hbg_priv *priv) +{ + u32 ctrl = 0; + + ctrl |= FIELD_PREP(HBG_REG_TRANSMIT_CTRL_AN_EN_B, HBG_STATUS_ENABLE); + ctrl |= FIELD_PREP(HBG_REG_TRANSMIT_CTRL_CRC_ADD_B, HBG_STATUS_ENABLE); + ctrl |= FIELD_PREP(HBG_REG_TRANSMIT_CTRL_PAD_EN_B, HBG_STATUS_ENABLE); + + hbg_reg_write(priv, HBG_REG_TRANSMIT_CTRL_ADDR, ctrl); +} + +static void hbg_hw_init_rx_ctrl(struct hbg_priv *priv) +{ + u32 ctrl = 0; + + ctrl |= FIELD_PREP(HBG_REG_RX_CTRL_RX_GET_ADDR_MODE_B, + HBG_STATUS_ENABLE); + ctrl |= FIELD_PREP(HBG_REG_RX_CTRL_TIME_INF_EN_B, HBG_STATUS_DISABLE); + ctrl |= FIELD_PREP(HBG_REG_RX_CTRL_RXBUF_1ST_SKIP_SIZE_M, HBG_RX_SKIP1); + ctrl |= FIELD_PREP(HBG_REG_RX_CTRL_RXBUF_1ST_SKIP_SIZE2_M, + HBG_RX_SKIP2); + ctrl |= FIELD_PREP(HBG_REG_RX_CTRL_RX_ALIGN_NUM_M, NET_IP_ALIGN); + ctrl |= FIELD_PREP(HBG_REG_RX_CTRL_PORT_NUM, priv->dev_specs.mac_id); + + hbg_reg_write(priv, HBG_REG_RX_CTRL_ADDR, ctrl); +} + +static void hbg_hw_init_rx_control(struct hbg_priv *priv) +{ + hbg_hw_init_rx_ctrl(priv); + + /* parse from L2 layer */ + hbg_reg_write_field(priv, HBG_REG_RX_PKT_MODE_ADDR, + HBG_REG_RX_PKT_MODE_PARSE_MODE_M, 0x1); + + hbg_reg_write_field(priv, HBG_REG_RECV_CTRL_ADDR, + HBG_REG_RECV_CTRL_STRIP_PAD_EN_B, + HBG_STATUS_ENABLE); + hbg_reg_write_field(priv, HBG_REG_RX_BUF_SIZE_ADDR, + HBG_REG_RX_BUF_SIZE_M, priv->dev_specs.rx_buf_size); + hbg_reg_write_field(priv, HBG_REG_CF_CRC_STRIP_ADDR, + HBG_REG_CF_CRC_STRIP_B, HBG_STATUS_DISABLE); +} + +int hbg_hw_init(struct hbg_priv *priv) +{ + int ret; + + ret = hbg_hw_dev_specs_init(priv); + if (ret) + return ret; + + hbg_reg_write_field(priv, HBG_REG_BUS_CTRL_ADDR, + HBG_REG_BUS_CTRL_ENDIAN_M, + HBG_ENDIAN_CTRL_LE_DATA_BE); + hbg_reg_write_field(priv, HBG_REG_MODE_CHANGE_EN_ADDR, + HBG_REG_MODE_CHANGE_EN_B, HBG_STATUS_ENABLE); + + hbg_hw_init_rx_control(priv); + hbg_hw_init_transmit_ctrl(priv); + return 0; +} |