382 lines
11 KiB
C
382 lines
11 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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// Copyright (c) 2016-2017 Hisilicon Limited.
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#include "hclge_mbx.h"
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#include "hclgevf_main.h"
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#include "hnae3.h"
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#define CREATE_TRACE_POINTS
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#include "hclgevf_trace.h"
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static int hclgevf_resp_to_errno(u16 resp_code)
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{
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return resp_code ? -resp_code : 0;
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}
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#define HCLGEVF_MBX_MATCH_ID_START 1
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static void hclgevf_reset_mbx_resp_status(struct hclgevf_dev *hdev)
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{
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/* this function should be called with mbx_resp.mbx_mutex held
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* to protect the received_response from race condition
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*/
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hdev->mbx_resp.received_resp = false;
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hdev->mbx_resp.origin_mbx_msg = 0;
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hdev->mbx_resp.resp_status = 0;
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hdev->mbx_resp.match_id++;
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/* Update match_id and ensure the value of match_id is not zero */
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if (hdev->mbx_resp.match_id == 0)
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hdev->mbx_resp.match_id = HCLGEVF_MBX_MATCH_ID_START;
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memset(hdev->mbx_resp.additional_info, 0, HCLGE_MBX_MAX_RESP_DATA_SIZE);
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}
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/* hclgevf_get_mbx_resp: used to get a response from PF after VF sends a mailbox
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* message to PF.
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* @hdev: pointer to struct hclgevf_dev
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* @code0: the message opcode VF send to PF.
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* @code1: the message sub-opcode VF send to PF.
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* @resp_data: pointer to store response data from PF to VF.
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* @resp_len: the length of resp_data from PF to VF.
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*/
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static int hclgevf_get_mbx_resp(struct hclgevf_dev *hdev, u16 code0, u16 code1,
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u8 *resp_data, u16 resp_len)
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{
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#define HCLGEVF_MAX_TRY_TIMES 500
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#define HCLGEVF_SLEEP_USECOND 1000
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struct hclgevf_mbx_resp_status *mbx_resp;
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u16 r_code0, r_code1;
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int i = 0;
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if (resp_len > HCLGE_MBX_MAX_RESP_DATA_SIZE) {
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dev_err(&hdev->pdev->dev,
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"VF mbx response len(=%u) exceeds maximum(=%u)\n",
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resp_len,
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HCLGE_MBX_MAX_RESP_DATA_SIZE);
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return -EINVAL;
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}
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while ((!hdev->mbx_resp.received_resp) && (i < HCLGEVF_MAX_TRY_TIMES)) {
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if (test_bit(HCLGE_COMM_STATE_CMD_DISABLE,
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&hdev->hw.hw.comm_state))
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return -EIO;
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usleep_range(HCLGEVF_SLEEP_USECOND, HCLGEVF_SLEEP_USECOND * 2);
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i++;
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}
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if (i >= HCLGEVF_MAX_TRY_TIMES) {
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dev_err(&hdev->pdev->dev,
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"VF could not get mbx(%u,%u) resp(=%d) from PF in %d tries\n",
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code0, code1, hdev->mbx_resp.received_resp, i);
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return -EIO;
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}
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mbx_resp = &hdev->mbx_resp;
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r_code0 = (u16)(mbx_resp->origin_mbx_msg >> 16);
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r_code1 = (u16)(mbx_resp->origin_mbx_msg & 0xff);
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if (mbx_resp->resp_status)
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return mbx_resp->resp_status;
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if (resp_data)
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memcpy(resp_data, &mbx_resp->additional_info[0], resp_len);
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hclgevf_reset_mbx_resp_status(hdev);
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if (!(r_code0 == code0 && r_code1 == code1 && !mbx_resp->resp_status)) {
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dev_err(&hdev->pdev->dev,
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"VF could not match resp code(code0=%u,code1=%u), %d\n",
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code0, code1, mbx_resp->resp_status);
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dev_err(&hdev->pdev->dev,
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"VF could not match resp r_code(r_code0=%u,r_code1=%u)\n",
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r_code0, r_code1);
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return -EIO;
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}
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return 0;
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}
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int hclgevf_send_mbx_msg(struct hclgevf_dev *hdev,
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struct hclge_vf_to_pf_msg *send_msg, bool need_resp,
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u8 *resp_data, u16 resp_len)
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{
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struct hclge_mbx_vf_to_pf_cmd *req;
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struct hclge_desc desc;
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int status;
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req = (struct hclge_mbx_vf_to_pf_cmd *)desc.data;
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if (!send_msg) {
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dev_err(&hdev->pdev->dev,
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"failed to send mbx, msg is NULL\n");
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return -EINVAL;
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}
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hclgevf_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_MBX_VF_TO_PF, false);
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if (need_resp)
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hnae3_set_bit(req->mbx_need_resp, HCLGE_MBX_NEED_RESP_B, 1);
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memcpy(&req->msg, send_msg, sizeof(struct hclge_vf_to_pf_msg));
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if (test_bit(HCLGEVF_STATE_NIC_REGISTERED, &hdev->state))
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trace_hclge_vf_mbx_send(hdev, req);
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/* synchronous send */
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if (need_resp) {
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mutex_lock(&hdev->mbx_resp.mbx_mutex);
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hclgevf_reset_mbx_resp_status(hdev);
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req->match_id = cpu_to_le16(hdev->mbx_resp.match_id);
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status = hclgevf_cmd_send(&hdev->hw, &desc, 1);
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if (status) {
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dev_err(&hdev->pdev->dev,
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"VF failed(=%d) to send mbx message to PF\n",
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status);
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mutex_unlock(&hdev->mbx_resp.mbx_mutex);
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return status;
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}
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status = hclgevf_get_mbx_resp(hdev, send_msg->code,
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send_msg->subcode, resp_data,
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resp_len);
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mutex_unlock(&hdev->mbx_resp.mbx_mutex);
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} else {
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/* asynchronous send */
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status = hclgevf_cmd_send(&hdev->hw, &desc, 1);
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if (status) {
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dev_err(&hdev->pdev->dev,
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"VF failed(=%d) to send mbx message to PF\n",
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status);
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return status;
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}
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}
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return status;
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}
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static bool hclgevf_cmd_crq_empty(struct hclgevf_hw *hw)
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{
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u32 tail = hclgevf_read_dev(hw, HCLGE_COMM_NIC_CRQ_TAIL_REG);
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return tail == hw->hw.cmq.crq.next_to_use;
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}
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static void hclgevf_handle_mbx_response(struct hclgevf_dev *hdev,
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struct hclge_mbx_pf_to_vf_cmd *req)
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{
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u16 vf_mbx_msg_subcode = le16_to_cpu(req->msg.vf_mbx_msg_subcode);
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u16 vf_mbx_msg_code = le16_to_cpu(req->msg.vf_mbx_msg_code);
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struct hclgevf_mbx_resp_status *resp = &hdev->mbx_resp;
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u16 resp_status = le16_to_cpu(req->msg.resp_status);
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u16 match_id = le16_to_cpu(req->match_id);
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if (resp->received_resp)
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dev_warn(&hdev->pdev->dev,
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"VF mbx resp flag not clear(%u)\n",
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vf_mbx_msg_code);
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resp->origin_mbx_msg = (vf_mbx_msg_code << 16);
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resp->origin_mbx_msg |= vf_mbx_msg_subcode;
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resp->resp_status = hclgevf_resp_to_errno(resp_status);
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memcpy(resp->additional_info, req->msg.resp_data,
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HCLGE_MBX_MAX_RESP_DATA_SIZE * sizeof(u8));
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if (match_id) {
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/* If match_id is not zero, it means PF support match_id.
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* if the match_id is right, VF get the right response, or
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* ignore the response. and driver will clear hdev->mbx_resp
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* when send next message which need response.
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*/
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if (match_id == resp->match_id)
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resp->received_resp = true;
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} else {
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resp->received_resp = true;
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}
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}
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static void hclgevf_handle_mbx_msg(struct hclgevf_dev *hdev,
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struct hclge_mbx_pf_to_vf_cmd *req)
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{
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/* we will drop the async msg if we find ARQ as full
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* and continue with next message
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*/
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if (atomic_read(&hdev->arq.count) >=
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HCLGE_MBX_MAX_ARQ_MSG_NUM) {
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dev_warn(&hdev->pdev->dev,
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"Async Q full, dropping msg(%u)\n",
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le16_to_cpu(req->msg.code));
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return;
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}
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/* tail the async message in arq */
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memcpy(hdev->arq.msg_q[hdev->arq.tail], &req->msg,
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HCLGE_MBX_MAX_ARQ_MSG_SIZE * sizeof(u16));
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hclge_mbx_tail_ptr_move_arq(hdev->arq);
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atomic_inc(&hdev->arq.count);
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hclgevf_mbx_task_schedule(hdev);
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}
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void hclgevf_mbx_handler(struct hclgevf_dev *hdev)
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{
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struct hclge_mbx_pf_to_vf_cmd *req;
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struct hclge_comm_cmq_ring *crq;
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struct hclge_desc *desc;
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u16 flag;
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u16 code;
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crq = &hdev->hw.hw.cmq.crq;
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while (!hclgevf_cmd_crq_empty(&hdev->hw)) {
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if (test_bit(HCLGE_COMM_STATE_CMD_DISABLE,
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&hdev->hw.hw.comm_state)) {
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dev_info(&hdev->pdev->dev, "vf crq need init\n");
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return;
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}
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desc = &crq->desc[crq->next_to_use];
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req = (struct hclge_mbx_pf_to_vf_cmd *)desc->data;
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flag = le16_to_cpu(crq->desc[crq->next_to_use].flag);
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code = le16_to_cpu(req->msg.code);
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if (unlikely(!hnae3_get_bit(flag, HCLGEVF_CMDQ_RX_OUTVLD_B))) {
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dev_warn(&hdev->pdev->dev,
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"dropped invalid mailbox message, code = %u\n",
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code);
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/* dropping/not processing this invalid message */
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crq->desc[crq->next_to_use].flag = 0;
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hclge_mbx_ring_ptr_move_crq(crq);
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continue;
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}
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trace_hclge_vf_mbx_get(hdev, req);
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/* synchronous messages are time critical and need preferential
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* treatment. Therefore, we need to acknowledge all the sync
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* responses as quickly as possible so that waiting tasks do not
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* timeout and simultaneously queue the async messages for later
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* prcessing in context of mailbox task i.e. the slow path.
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*/
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switch (code) {
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case HCLGE_MBX_PF_VF_RESP:
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hclgevf_handle_mbx_response(hdev, req);
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break;
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case HCLGE_MBX_LINK_STAT_CHANGE:
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case HCLGE_MBX_ASSERTING_RESET:
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case HCLGE_MBX_LINK_STAT_MODE:
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case HCLGE_MBX_PUSH_VLAN_INFO:
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case HCLGE_MBX_PUSH_PROMISC_INFO:
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hclgevf_handle_mbx_msg(hdev, req);
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break;
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default:
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dev_err(&hdev->pdev->dev,
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"VF received unsupported(%u) mbx msg from PF\n",
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code);
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break;
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}
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crq->desc[crq->next_to_use].flag = 0;
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hclge_mbx_ring_ptr_move_crq(crq);
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}
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/* Write back CMDQ_RQ header pointer, M7 need this pointer */
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hclgevf_write_dev(&hdev->hw, HCLGE_COMM_NIC_CRQ_HEAD_REG,
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crq->next_to_use);
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}
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static void hclgevf_parse_promisc_info(struct hclgevf_dev *hdev,
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u16 promisc_info)
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{
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if (!promisc_info)
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dev_info(&hdev->pdev->dev,
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"Promisc mode is closed by host for being untrusted.\n");
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}
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void hclgevf_mbx_async_handler(struct hclgevf_dev *hdev)
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{
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struct hclge_mbx_port_base_vlan *vlan_info;
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struct hclge_mbx_link_status *link_info;
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struct hclge_mbx_link_mode *link_mode;
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enum hnae3_reset_type reset_type;
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u16 link_status, state;
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__le16 *msg_q;
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u16 opcode;
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u8 duplex;
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u32 speed;
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u32 tail;
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u8 flag;
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u16 idx;
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tail = hdev->arq.tail;
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/* process all the async queue messages */
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while (tail != hdev->arq.head) {
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if (test_bit(HCLGE_COMM_STATE_CMD_DISABLE,
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&hdev->hw.hw.comm_state)) {
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dev_info(&hdev->pdev->dev,
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"vf crq need init in async\n");
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return;
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}
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msg_q = hdev->arq.msg_q[hdev->arq.head];
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opcode = le16_to_cpu(msg_q[0]);
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switch (opcode) {
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case HCLGE_MBX_LINK_STAT_CHANGE:
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link_info = (struct hclge_mbx_link_status *)(msg_q + 1);
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link_status = le16_to_cpu(link_info->link_status);
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speed = le32_to_cpu(link_info->speed);
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duplex = (u8)le16_to_cpu(link_info->duplex);
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flag = link_info->flag;
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/* update upper layer with new link link status */
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hclgevf_update_speed_duplex(hdev, speed, duplex);
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hclgevf_update_link_status(hdev, link_status);
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if (flag & HCLGE_MBX_PUSH_LINK_STATUS_EN)
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set_bit(HCLGEVF_STATE_PF_PUSH_LINK_STATUS,
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&hdev->state);
|
||
|
|
|
||
|
|
break;
|
||
|
|
case HCLGE_MBX_LINK_STAT_MODE:
|
||
|
|
link_mode = (struct hclge_mbx_link_mode *)(msg_q + 1);
|
||
|
|
idx = le16_to_cpu(link_mode->idx);
|
||
|
|
if (idx)
|
||
|
|
hdev->hw.mac.supported =
|
||
|
|
le64_to_cpu(link_mode->link_mode);
|
||
|
|
else
|
||
|
|
hdev->hw.mac.advertising =
|
||
|
|
le64_to_cpu(link_mode->link_mode);
|
||
|
|
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)le16_to_cpu(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:
|
||
|
|
vlan_info =
|
||
|
|
(struct hclge_mbx_port_base_vlan *)(msg_q + 1);
|
||
|
|
state = le16_to_cpu(vlan_info->state);
|
||
|
|
hclgevf_update_port_base_vlan_info(hdev, state,
|
||
|
|
vlan_info);
|
||
|
|
break;
|
||
|
|
case HCLGE_MBX_PUSH_PROMISC_INFO:
|
||
|
|
hclgevf_parse_promisc_info(hdev, le16_to_cpu(msg_q[1]));
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
dev_err(&hdev->pdev->dev,
|
||
|
|
"fetched unsupported(%u) message from arq\n",
|
||
|
|
opcode);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
hclge_mbx_head_ptr_move_arq(hdev->arq);
|
||
|
|
atomic_dec(&hdev->arq.count);
|
||
|
|
msg_q = hdev->arq.msg_q[hdev->arq.head];
|
||
|
|
}
|
||
|
|
}
|