| // SPDX-License-Identifier: GPL-2.0+ |
| // Copyright (c) 2016-2017 Hisilicon Limited. |
| |
| #include "hclge_mbx.h" |
| #include "hclgevf_main.h" |
| #include "hnae3.h" |
| |
| #define CREATE_TRACE_POINTS |
| #include "hclgevf_trace.h" |
| |
| static int hclgevf_resp_to_errno(u16 resp_code) |
| { |
| return resp_code ? -resp_code : 0; |
| } |
| |
| #define HCLGEVF_MBX_MATCH_ID_START 1 |
| static void hclgevf_reset_mbx_resp_status(struct hclgevf_dev *hdev) |
| { |
| /* this function should be called with mbx_resp.mbx_mutex held |
| * to prtect the received_response from race condition |
| */ |
| hdev->mbx_resp.received_resp = false; |
| hdev->mbx_resp.origin_mbx_msg = 0; |
| hdev->mbx_resp.resp_status = 0; |
| hdev->mbx_resp.match_id++; |
| /* Update match_id and ensure the value of match_id is not zero */ |
| if (hdev->mbx_resp.match_id == 0) |
| hdev->mbx_resp.match_id = HCLGEVF_MBX_MATCH_ID_START; |
| memset(hdev->mbx_resp.additional_info, 0, HCLGE_MBX_MAX_RESP_DATA_SIZE); |
| } |
| |
| /* hclgevf_get_mbx_resp: used to get a response from PF after VF sends a mailbox |
| * message to PF. |
| * @hdev: pointer to struct hclgevf_dev |
| * @resp_msg: pointer to store the original message type and response status |
| * @len: the resp_msg data array length. |
| */ |
| static int hclgevf_get_mbx_resp(struct hclgevf_dev *hdev, u16 code0, u16 code1, |
| u8 *resp_data, u16 resp_len) |
| { |
| #define HCLGEVF_MAX_TRY_TIMES 500 |
| #define HCLGEVF_SLEEP_USECOND 1000 |
| struct hclgevf_mbx_resp_status *mbx_resp; |
| u16 r_code0, r_code1; |
| int i = 0; |
| |
| if (resp_len > HCLGE_MBX_MAX_RESP_DATA_SIZE) { |
| dev_err(&hdev->pdev->dev, |
| "VF mbx response len(=%u) exceeds maximum(=%u)\n", |
| resp_len, |
| HCLGE_MBX_MAX_RESP_DATA_SIZE); |
| return -EINVAL; |
| } |
| |
| while ((!hdev->mbx_resp.received_resp) && (i < HCLGEVF_MAX_TRY_TIMES)) { |
| if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state)) |
| return -EIO; |
| |
| usleep_range(HCLGEVF_SLEEP_USECOND, HCLGEVF_SLEEP_USECOND * 2); |
| i++; |
| } |
| |
| if (i >= HCLGEVF_MAX_TRY_TIMES) { |
| dev_err(&hdev->pdev->dev, |
| "VF could not get mbx(%u,%u) resp(=%d) from PF in %d tries\n", |
| code0, code1, hdev->mbx_resp.received_resp, i); |
| return -EIO; |
| } |
| |
| mbx_resp = &hdev->mbx_resp; |
| r_code0 = (u16)(mbx_resp->origin_mbx_msg >> 16); |
| r_code1 = (u16)(mbx_resp->origin_mbx_msg & 0xff); |
| |
| if (mbx_resp->resp_status) |
| return mbx_resp->resp_status; |
| |
| if (resp_data) |
| memcpy(resp_data, &mbx_resp->additional_info[0], resp_len); |
| |
| hclgevf_reset_mbx_resp_status(hdev); |
| |
| if (!(r_code0 == code0 && r_code1 == code1 && !mbx_resp->resp_status)) { |
| dev_err(&hdev->pdev->dev, |
| "VF could not match resp code(code0=%u,code1=%u), %d\n", |
| code0, code1, mbx_resp->resp_status); |
| dev_err(&hdev->pdev->dev, |
| "VF could not match resp r_code(r_code0=%u,r_code1=%u)\n", |
| r_code0, r_code1); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| int hclgevf_send_mbx_msg(struct hclgevf_dev *hdev, |
| struct hclge_vf_to_pf_msg *send_msg, bool need_resp, |
| u8 *resp_data, u16 resp_len) |
| { |
| struct hclge_mbx_vf_to_pf_cmd *req; |
| struct hclgevf_desc desc; |
| int status; |
| |
| req = (struct hclge_mbx_vf_to_pf_cmd *)desc.data; |
| |
| if (!send_msg) { |
| dev_err(&hdev->pdev->dev, |
| "failed to send mbx, msg is NULL\n"); |
| return -EINVAL; |
| } |
| |
| hclgevf_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_MBX_VF_TO_PF, false); |
| if (need_resp) |
| hnae3_set_bit(req->mbx_need_resp, HCLGE_MBX_NEED_RESP_B, 1); |
| |
| memcpy(&req->msg, send_msg, sizeof(struct hclge_vf_to_pf_msg)); |
| |
| if (test_bit(HCLGEVF_STATE_NIC_REGISTERED, &hdev->state)) |
| trace_hclge_vf_mbx_send(hdev, req); |
| |
| /* synchronous send */ |
| if (need_resp) { |
| mutex_lock(&hdev->mbx_resp.mbx_mutex); |
| hclgevf_reset_mbx_resp_status(hdev); |
| req->match_id = hdev->mbx_resp.match_id; |
| status = hclgevf_cmd_send(&hdev->hw, &desc, 1); |
| if (status) { |
| dev_err(&hdev->pdev->dev, |
| "VF failed(=%d) to send mbx message to PF\n", |
| status); |
| mutex_unlock(&hdev->mbx_resp.mbx_mutex); |
| return status; |
| } |
| |
| status = hclgevf_get_mbx_resp(hdev, send_msg->code, |
| send_msg->subcode, resp_data, |
| resp_len); |
| mutex_unlock(&hdev->mbx_resp.mbx_mutex); |
| } else { |
| /* asynchronous send */ |
| status = hclgevf_cmd_send(&hdev->hw, &desc, 1); |
| if (status) { |
| dev_err(&hdev->pdev->dev, |
| "VF failed(=%d) to send mbx message to PF\n", |
| status); |
| return status; |
| } |
| } |
| |
| return status; |
| } |
| |
| static bool hclgevf_cmd_crq_empty(struct hclgevf_hw *hw) |
| { |
| u32 tail = hclgevf_read_dev(hw, HCLGEVF_NIC_CRQ_TAIL_REG); |
| |
| return tail == hw->cmq.crq.next_to_use; |
| } |
| |
| static void hclgevf_handle_mbx_response(struct hclgevf_dev *hdev, |
| struct hclge_mbx_pf_to_vf_cmd *req) |
| { |
| struct hclgevf_mbx_resp_status *resp = &hdev->mbx_resp; |
| |
| if (resp->received_resp) |
| dev_warn(&hdev->pdev->dev, |
| "VF mbx resp flag not clear(%u)\n", |
| req->msg.vf_mbx_msg_code); |
| |
| resp->origin_mbx_msg = |
| (req->msg.vf_mbx_msg_code << 16); |
| resp->origin_mbx_msg |= req->msg.vf_mbx_msg_subcode; |
| resp->resp_status = |
| hclgevf_resp_to_errno(req->msg.resp_status); |
| memcpy(resp->additional_info, req->msg.resp_data, |
| HCLGE_MBX_MAX_RESP_DATA_SIZE * sizeof(u8)); |
| if (req->match_id) { |
| /* If match_id is not zero, it means PF support match_id. |
| * if the match_id is right, VF get the right response, or |
| * ignore the response. and driver will clear hdev->mbx_resp |
| * when send next message which need response. |
| */ |
| if (req->match_id == resp->match_id) |
| resp->received_resp = true; |
| } else { |
| resp->received_resp = true; |
| } |
| } |
| |
| static void hclgevf_handle_mbx_msg(struct hclgevf_dev *hdev, |
| struct hclge_mbx_pf_to_vf_cmd *req) |
| { |
| /* we will drop the async msg if we find ARQ as full |
| * and continue with next message |
| */ |
| if (atomic_read(&hdev->arq.count) >= |
| HCLGE_MBX_MAX_ARQ_MSG_NUM) { |
| dev_warn(&hdev->pdev->dev, |
| "Async Q full, dropping msg(%u)\n", |
| req->msg.code); |
| return; |
| } |
| |
| /* tail the async message in arq */ |
| memcpy(hdev->arq.msg_q[hdev->arq.tail], &req->msg, |
| HCLGE_MBX_MAX_ARQ_MSG_SIZE * sizeof(u16)); |
| hclge_mbx_tail_ptr_move_arq(hdev->arq); |
| atomic_inc(&hdev->arq.count); |
| |
| hclgevf_mbx_task_schedule(hdev); |
| } |
| |
| void hclgevf_mbx_handler(struct hclgevf_dev *hdev) |
| { |
| struct hclge_mbx_pf_to_vf_cmd *req; |
| struct hclgevf_cmq_ring *crq; |
| struct hclgevf_desc *desc; |
| u16 flag; |
| |
| crq = &hdev->hw.cmq.crq; |
| |
| while (!hclgevf_cmd_crq_empty(&hdev->hw)) { |
| if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state)) { |
| dev_info(&hdev->pdev->dev, "vf crq need init\n"); |
| return; |
| } |
| |
| desc = &crq->desc[crq->next_to_use]; |
| req = (struct hclge_mbx_pf_to_vf_cmd *)desc->data; |
| |
| flag = le16_to_cpu(crq->desc[crq->next_to_use].flag); |
| if (unlikely(!hnae3_get_bit(flag, HCLGEVF_CMDQ_RX_OUTVLD_B))) { |
| dev_warn(&hdev->pdev->dev, |
| "dropped invalid mailbox message, code = %u\n", |
| req->msg.code); |
| |
| /* dropping/not processing this invalid message */ |
| crq->desc[crq->next_to_use].flag = 0; |
| hclge_mbx_ring_ptr_move_crq(crq); |
| continue; |
| } |
| |
| trace_hclge_vf_mbx_get(hdev, req); |
| |
| /* synchronous messages are time critical and need preferential |
| * treatment. Therefore, we need to acknowledge all the sync |
| * responses as quickly as possible so that waiting tasks do not |
| * timeout and simultaneously queue the async messages for later |
| * prcessing in context of mailbox task i.e. the slow path. |
| */ |
| switch (req->msg.code) { |
| case HCLGE_MBX_PF_VF_RESP: |
| hclgevf_handle_mbx_response(hdev, req); |
| break; |
| case HCLGE_MBX_LINK_STAT_CHANGE: |
| case HCLGE_MBX_ASSERTING_RESET: |
| case HCLGE_MBX_LINK_STAT_MODE: |
| case HCLGE_MBX_PUSH_VLAN_INFO: |
| case HCLGE_MBX_PUSH_PROMISC_INFO: |
| hclgevf_handle_mbx_msg(hdev, req); |
| break; |
| default: |
| dev_err(&hdev->pdev->dev, |
| "VF received unsupported(%u) mbx msg from PF\n", |
| req->msg.code); |
| break; |
| } |
| crq->desc[crq->next_to_use].flag = 0; |
| hclge_mbx_ring_ptr_move_crq(crq); |
| } |
| |
| /* Write back CMDQ_RQ header pointer, M7 need this pointer */ |
| hclgevf_write_dev(&hdev->hw, HCLGEVF_NIC_CRQ_HEAD_REG, |
| crq->next_to_use); |
| } |
| |
| static void hclgevf_parse_promisc_info(struct hclgevf_dev *hdev, |
| u16 promisc_info) |
| { |
| if (!promisc_info) |
| dev_info(&hdev->pdev->dev, |
| "Promisc mode is closed by host for being untrusted.\n"); |
| } |
| |
| void hclgevf_mbx_async_handler(struct hclgevf_dev *hdev) |
| { |
| enum hnae3_reset_type reset_type; |
| u16 link_status, state; |
| u16 *msg_q, *vlan_info; |
| u8 duplex; |
| u32 speed; |
| u32 tail; |
| u8 flag; |
| u8 idx; |
| |
| tail = hdev->arq.tail; |
| |
| /* process all the async queue messages */ |
| while (tail != hdev->arq.head) { |
| if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state)) { |
| dev_info(&hdev->pdev->dev, |
| "vf crq need init in async\n"); |
| return; |
| } |
| |
| msg_q = hdev->arq.msg_q[hdev->arq.head]; |
| |
| switch (msg_q[0]) { |
| case HCLGE_MBX_LINK_STAT_CHANGE: |
| link_status = msg_q[1]; |
| memcpy(&speed, &msg_q[2], sizeof(speed)); |
| duplex = (u8)msg_q[4]; |
| flag = (u8)msg_q[5]; |
| |
| /* update upper layer with new link link status */ |
| hclgevf_update_speed_duplex(hdev, speed, duplex); |
| hclgevf_update_link_status(hdev, link_status); |
| |
| if (flag & HCLGE_MBX_PUSH_LINK_STATUS_EN) |
| set_bit(HCLGEVF_STATE_PF_PUSH_LINK_STATUS, |
| &hdev->state); |
| |
| break; |
| case HCLGE_MBX_LINK_STAT_MODE: |
| idx = (u8)msg_q[1]; |
| if (idx) |
| memcpy(&hdev->hw.mac.supported, &msg_q[2], |
| sizeof(unsigned long)); |
| else |
| memcpy(&hdev->hw.mac.advertising, &msg_q[2], |
| sizeof(unsigned long)); |
| break; |
| case HCLGE_MBX_ASSERTING_RESET: |
| /* PF has asserted reset hence VF should go in pending |
| * state and poll for the hardware reset status till it |
| * has been completely reset. After this stack should |
| * eventually be re-initialized. |
| */ |
| reset_type = (enum hnae3_reset_type)msg_q[1]; |
| set_bit(reset_type, &hdev->reset_pending); |
| set_bit(HCLGEVF_RESET_PENDING, &hdev->reset_state); |
| hclgevf_reset_task_schedule(hdev); |
| |
| break; |
| case HCLGE_MBX_PUSH_VLAN_INFO: |
| state = msg_q[1]; |
| vlan_info = &msg_q[1]; |
| hclgevf_update_port_base_vlan_info(hdev, state, |
| (u8 *)vlan_info, 8); |
| break; |
| case HCLGE_MBX_PUSH_PROMISC_INFO: |
| hclgevf_parse_promisc_info(hdev, msg_q[1]); |
| break; |
| default: |
| dev_err(&hdev->pdev->dev, |
| "fetched unsupported(%u) message from arq\n", |
| msg_q[0]); |
| break; |
| } |
| |
| hclge_mbx_head_ptr_move_arq(hdev->arq); |
| atomic_dec(&hdev->arq.count); |
| msg_q = hdev->arq.msg_q[hdev->arq.head]; |
| } |
| } |