328 lines
8.9 KiB
C
328 lines
8.9 KiB
C
// 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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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 prtect 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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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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* @resp_msg: pointer to store the original message type and response status
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* @len: the resp_msg data array length.
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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(=%d) exceeds maximum(=%d)\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(HCLGEVF_STATE_CMD_DISABLE, &hdev->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(%d,%d) 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=%d,code1=%d), %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=%d,r_code1=%d)\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, u16 code, u16 subcode,
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const u8 *msg_data, u8 msg_len, 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 hclgevf_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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/* first two bytes are reserved for code & subcode */
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if (msg_len > (HCLGE_MBX_MAX_MSG_SIZE - 2)) {
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dev_err(&hdev->pdev->dev,
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"VF send mbx msg fail, msg len %d exceeds max len %d\n",
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msg_len, HCLGE_MBX_MAX_MSG_SIZE);
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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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req->mbx_need_resp |= need_resp ? HCLGE_MBX_NEED_RESP_BIT :
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~HCLGE_MBX_NEED_RESP_BIT;
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req->msg[0] = code;
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req->msg[1] = subcode;
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if (msg_data)
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memcpy(&req->msg[2], msg_data, msg_len);
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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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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, code, 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, HCLGEVF_NIC_CRQ_TAIL_REG);
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return tail == hw->cmq.crq.next_to_use;
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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 hclgevf_mbx_resp_status *resp;
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struct hclge_mbx_pf_to_vf_cmd *req;
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struct hclgevf_cmq_ring *crq;
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struct hclgevf_desc *desc;
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u16 *msg_q;
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u16 flag;
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u8 *temp;
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int i;
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resp = &hdev->mbx_resp;
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crq = &hdev->hw.cmq.crq;
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while (!hclgevf_cmd_crq_empty(&hdev->hw)) {
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if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->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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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 = %d\n",
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req->msg[0]);
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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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/* 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 (req->msg[0]) {
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case HCLGE_MBX_PF_VF_RESP:
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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(%d)\n",
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req->msg[1]);
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resp->received_resp = true;
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resp->origin_mbx_msg = (req->msg[1] << 16);
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resp->origin_mbx_msg |= req->msg[2];
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resp->resp_status = req->msg[3];
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temp = (u8 *)&req->msg[4];
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for (i = 0; i < HCLGE_MBX_MAX_RESP_DATA_SIZE; i++) {
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resp->additional_info[i] = *temp;
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temp++;
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}
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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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/* set this mbx event as pending. This is required as we
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* might loose interrupt event when mbx task is busy
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* handling. This shall be cleared when mbx task just
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* enters handling state.
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*/
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hdev->mbx_event_pending = true;
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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(%d)\n",
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req->msg[1]);
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break;
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}
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/* tail the async message in arq */
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msg_q = hdev->arq.msg_q[hdev->arq.tail];
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memcpy(&msg_q[0], 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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break;
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default:
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dev_err(&hdev->pdev->dev,
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"VF received unsupported(%d) mbx msg from PF\n",
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req->msg[0]);
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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, HCLGEVF_NIC_CRQ_HEAD_REG,
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crq->next_to_use);
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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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enum hnae3_reset_type reset_type;
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u16 link_status, state;
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u16 *msg_q, *vlan_info;
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u8 duplex;
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u32 speed;
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u32 tail;
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u8 idx;
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/* we can safely clear it now as we are at start of the async message
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* processing
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*/
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hdev->mbx_event_pending = false;
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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(HCLGEVF_STATE_CMD_DISABLE, &hdev->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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switch (msg_q[0]) {
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case HCLGE_MBX_LINK_STAT_CHANGE:
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link_status = msg_q[1];
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memcpy(&speed, &msg_q[2], sizeof(speed));
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duplex = (u8)msg_q[4];
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/* update upper layer with new link link status */
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hclgevf_update_link_status(hdev, link_status);
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hclgevf_update_speed_duplex(hdev, speed, duplex);
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break;
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case HCLGE_MBX_LINK_STAT_MODE:
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idx = (u8)msg_q[1];
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if (idx)
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memcpy(&hdev->hw.mac.supported, &msg_q[2],
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sizeof(unsigned long));
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else
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memcpy(&hdev->hw.mac.advertising, &msg_q[2],
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sizeof(unsigned long));
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break;
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case HCLGE_MBX_ASSERTING_RESET:
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/* PF has asserted reset hence VF should go in pending
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* state and poll for the hardware reset status till it
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* has been completely reset. After this stack should
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* eventually be re-initialized.
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*/
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reset_type = (enum hnae3_reset_type)msg_q[1];
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set_bit(reset_type, &hdev->reset_pending);
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set_bit(HCLGEVF_RESET_PENDING, &hdev->reset_state);
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hclgevf_reset_task_schedule(hdev);
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break;
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case HCLGE_MBX_PUSH_VLAN_INFO:
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state = msg_q[1];
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vlan_info = &msg_q[1];
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hclgevf_update_port_base_vlan_info(hdev, state,
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(u8 *)vlan_info, 8);
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break;
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default:
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dev_err(&hdev->pdev->dev,
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"fetched unsupported(%d) message from arq\n",
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msg_q[0]);
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break;
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}
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hclge_mbx_head_ptr_move_arq(hdev->arq);
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atomic_dec(&hdev->arq.count);
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msg_q = hdev->arq.msg_q[hdev->arq.head];
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}
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}
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