diff options
Diffstat (limited to 'drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c')
| -rw-r--r-- | drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c new file mode 100644 index 000000000000..8c8bd5e8e1db --- /dev/null +++ b/drivers/net/ethernet/mucse/rnpgbe/rnpgbe_mbx_fw.c @@ -0,0 +1,191 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2020 - 2025 Mucse Corporation. */ + +#include <linux/if_ether.h> +#include <linux/bitfield.h> + +#include "rnpgbe.h" +#include "rnpgbe_mbx.h" +#include "rnpgbe_mbx_fw.h" + +/** + * mucse_fw_send_cmd_wait_resp - Send cmd req and wait for response + * @hw: pointer to the HW structure + * @req: pointer to the cmd req structure + * @reply: pointer to the fw reply structure + * + * mucse_fw_send_cmd_wait_resp sends req to pf-fw mailbox and wait + * reply from fw. + * + * Return: 0 on success, negative errno on failure + **/ +static int mucse_fw_send_cmd_wait_resp(struct mucse_hw *hw, + struct mbx_fw_cmd_req *req, + struct mbx_fw_cmd_reply *reply) +{ + int len = le16_to_cpu(req->datalen); + int retry_cnt = 3; + int err; + + mutex_lock(&hw->mbx.lock); + err = mucse_write_and_wait_ack_mbx(hw, (u32 *)req, len); + if (err) + goto out; + do { + err = mucse_poll_and_read_mbx(hw, (u32 *)reply, + sizeof(*reply)); + if (err) + goto out; + /* mucse_write_and_wait_ack_mbx return 0 means fw has + * received request, wait for the expect opcode + * reply with 'retry_cnt' times. + */ + } while (--retry_cnt >= 0 && reply->opcode != req->opcode); +out: + mutex_unlock(&hw->mbx.lock); + if (!err && retry_cnt < 0) + return -ETIMEDOUT; + if (!err && reply->error_code) + return -EIO; + + return err; +} + +/** + * mucse_mbx_get_info - Get hw info from fw + * @hw: pointer to the HW structure + * + * mucse_mbx_get_info tries to get hw info from hw. + * + * Return: 0 on success, negative errno on failure + **/ +static int mucse_mbx_get_info(struct mucse_hw *hw) +{ + struct mbx_fw_cmd_req req = { + .datalen = cpu_to_le16(MUCSE_MBX_REQ_HDR_LEN), + .opcode = cpu_to_le16(GET_HW_INFO), + }; + struct mbx_fw_cmd_reply reply = {}; + int err; + + err = mucse_fw_send_cmd_wait_resp(hw, &req, &reply); + if (!err) + hw->pfvfnum = FIELD_GET(GENMASK_U16(7, 0), + le16_to_cpu(reply.hw_info.pfnum)); + + return err; +} + +/** + * mucse_mbx_sync_fw - Try to sync with fw + * @hw: pointer to the HW structure + * + * mucse_mbx_sync_fw tries to sync with fw. It is only called in + * probe. Nothing (register network) todo if failed. + * Try more times to do sync. + * + * Return: 0 on success, negative errno on failure + **/ +int mucse_mbx_sync_fw(struct mucse_hw *hw) +{ + int try_cnt = 3; + int err; + + do { + err = mucse_mbx_get_info(hw); + } while (err == -ETIMEDOUT && try_cnt--); + + return err; +} + +/** + * mucse_mbx_powerup - Echo fw to powerup + * @hw: pointer to the HW structure + * @is_powerup: true for powerup, false for powerdown + * + * mucse_mbx_powerup echo fw to change working frequency + * to normal after received true, and reduce working frequency + * if false. + * + * Return: 0 on success, negative errno on failure + **/ +int mucse_mbx_powerup(struct mucse_hw *hw, bool is_powerup) +{ + struct mbx_fw_cmd_req req = { + .datalen = cpu_to_le16(sizeof(req.powerup) + + MUCSE_MBX_REQ_HDR_LEN), + .opcode = cpu_to_le16(POWER_UP), + .powerup = { + /* fw needs this to reply correct cmd */ + .version = cpu_to_le32(GENMASK_U32(31, 0)), + .status = cpu_to_le32(is_powerup ? 1 : 0), + }, + }; + int len, err; + + len = le16_to_cpu(req.datalen); + mutex_lock(&hw->mbx.lock); + err = mucse_write_and_wait_ack_mbx(hw, (u32 *)&req, len); + mutex_unlock(&hw->mbx.lock); + + return err; +} + +/** + * mucse_mbx_reset_hw - Posts a mbx req to reset hw + * @hw: pointer to the HW structure + * + * mucse_mbx_reset_hw posts a mbx req to firmware to reset hw. + * We use mucse_fw_send_cmd_wait_resp to wait hw reset ok. + * + * Return: 0 on success, negative errno on failure + **/ +int mucse_mbx_reset_hw(struct mucse_hw *hw) +{ + struct mbx_fw_cmd_req req = { + .datalen = cpu_to_le16(MUCSE_MBX_REQ_HDR_LEN), + .opcode = cpu_to_le16(RESET_HW), + }; + struct mbx_fw_cmd_reply reply = {}; + + return mucse_fw_send_cmd_wait_resp(hw, &req, &reply); +} + +/** + * mucse_mbx_get_macaddr - Posts a mbx req to request macaddr + * @hw: pointer to the HW structure + * @pfvfnum: index of pf/vf num + * @mac_addr: pointer to store mac_addr + * @port: port index + * + * mucse_mbx_get_macaddr posts a mbx req to firmware to get mac_addr. + * + * Return: 0 on success, negative errno on failure + **/ +int mucse_mbx_get_macaddr(struct mucse_hw *hw, int pfvfnum, + u8 *mac_addr, + int port) +{ + struct mbx_fw_cmd_req req = { + .datalen = cpu_to_le16(sizeof(req.get_mac_addr) + + MUCSE_MBX_REQ_HDR_LEN), + .opcode = cpu_to_le16(GET_MAC_ADDRESS), + .get_mac_addr = { + .port_mask = cpu_to_le32(BIT(port)), + .pfvf_num = cpu_to_le32(pfvfnum), + }, + }; + struct mbx_fw_cmd_reply reply = {}; + int err; + + err = mucse_fw_send_cmd_wait_resp(hw, &req, &reply); + if (err) + return err; + + if (le32_to_cpu(reply.mac_addr.ports) & BIT(port)) + memcpy(mac_addr, reply.mac_addr.addrs[port].mac, ETH_ALEN); + else + return -ENODATA; + + return 0; +} |