1 // SPDX-License-Identifier: GPL-2.0+
2 // Copyright (c) 2016-2017 Hisilicon Limited.
5 #include "hclgevf_main.h"
8 static void hclgevf_reset_mbx_resp_status(struct hclgevf_dev *hdev)
10 /* this function should be called with mbx_resp.mbx_mutex held
11 * to prtect the received_response from race condition
13 hdev->mbx_resp.received_resp = false;
14 hdev->mbx_resp.origin_mbx_msg = 0;
15 hdev->mbx_resp.resp_status = 0;
16 memset(hdev->mbx_resp.additional_info, 0, HCLGE_MBX_MAX_RESP_DATA_SIZE);
19 /* hclgevf_get_mbx_resp: used to get a response from PF after VF sends a mailbox
21 * @hdev: pointer to struct hclgevf_dev
22 * @resp_msg: pointer to store the original message type and response status
23 * @len: the resp_msg data array length.
25 static int hclgevf_get_mbx_resp(struct hclgevf_dev *hdev, u16 code0, u16 code1,
26 u8 *resp_data, u16 resp_len)
28 #define HCLGEVF_MAX_TRY_TIMES 500
29 #define HCLGEVF_SLEEP_USECOND 1000
30 struct hclgevf_mbx_resp_status *mbx_resp;
34 if (resp_len > HCLGE_MBX_MAX_RESP_DATA_SIZE) {
35 dev_err(&hdev->pdev->dev,
36 "VF mbx response len(=%d) exceeds maximum(=%d)\n",
38 HCLGE_MBX_MAX_RESP_DATA_SIZE);
42 while ((!hdev->mbx_resp.received_resp) && (i < HCLGEVF_MAX_TRY_TIMES)) {
43 if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state))
46 usleep_range(HCLGEVF_SLEEP_USECOND, HCLGEVF_SLEEP_USECOND * 2);
50 if (i >= HCLGEVF_MAX_TRY_TIMES) {
51 dev_err(&hdev->pdev->dev,
52 "VF could not get mbx(%d,%d) resp(=%d) from PF in %d tries\n",
53 code0, code1, hdev->mbx_resp.received_resp, i);
57 mbx_resp = &hdev->mbx_resp;
58 r_code0 = (u16)(mbx_resp->origin_mbx_msg >> 16);
59 r_code1 = (u16)(mbx_resp->origin_mbx_msg & 0xff);
61 if (mbx_resp->resp_status)
62 return mbx_resp->resp_status;
65 memcpy(resp_data, &mbx_resp->additional_info[0], resp_len);
67 hclgevf_reset_mbx_resp_status(hdev);
69 if (!(r_code0 == code0 && r_code1 == code1 && !mbx_resp->resp_status)) {
70 dev_err(&hdev->pdev->dev,
71 "VF could not match resp code(code0=%d,code1=%d), %d\n",
72 code0, code1, mbx_resp->resp_status);
73 dev_err(&hdev->pdev->dev,
74 "VF could not match resp r_code(r_code0=%d,r_code1=%d)\n",
82 int hclgevf_send_mbx_msg(struct hclgevf_dev *hdev, u16 code, u16 subcode,
83 const u8 *msg_data, u8 msg_len, bool need_resp,
84 u8 *resp_data, u16 resp_len)
86 struct hclge_mbx_vf_to_pf_cmd *req;
87 struct hclgevf_desc desc;
90 req = (struct hclge_mbx_vf_to_pf_cmd *)desc.data;
92 /* first two bytes are reserved for code & subcode */
93 if (msg_len > (HCLGE_MBX_MAX_MSG_SIZE - 2)) {
94 dev_err(&hdev->pdev->dev,
95 "VF send mbx msg fail, msg len %d exceeds max len %d\n",
96 msg_len, HCLGE_MBX_MAX_MSG_SIZE);
100 hclgevf_cmd_setup_basic_desc(&desc, HCLGEVF_OPC_MBX_VF_TO_PF, false);
101 req->mbx_need_resp |= need_resp ? HCLGE_MBX_NEED_RESP_BIT :
102 ~HCLGE_MBX_NEED_RESP_BIT;
104 req->msg[1] = subcode;
106 memcpy(&req->msg[2], msg_data, msg_len);
108 /* synchronous send */
110 mutex_lock(&hdev->mbx_resp.mbx_mutex);
111 hclgevf_reset_mbx_resp_status(hdev);
112 status = hclgevf_cmd_send(&hdev->hw, &desc, 1);
114 dev_err(&hdev->pdev->dev,
115 "VF failed(=%d) to send mbx message to PF\n",
117 mutex_unlock(&hdev->mbx_resp.mbx_mutex);
121 status = hclgevf_get_mbx_resp(hdev, code, subcode, resp_data,
123 mutex_unlock(&hdev->mbx_resp.mbx_mutex);
125 /* asynchronous send */
126 status = hclgevf_cmd_send(&hdev->hw, &desc, 1);
128 dev_err(&hdev->pdev->dev,
129 "VF failed(=%d) to send mbx message to PF\n",
138 static bool hclgevf_cmd_crq_empty(struct hclgevf_hw *hw)
140 u32 tail = hclgevf_read_dev(hw, HCLGEVF_NIC_CRQ_TAIL_REG);
142 return tail == hw->cmq.crq.next_to_use;
145 void hclgevf_mbx_handler(struct hclgevf_dev *hdev)
147 struct hclgevf_mbx_resp_status *resp;
148 struct hclge_mbx_pf_to_vf_cmd *req;
149 struct hclgevf_cmq_ring *crq;
150 struct hclgevf_desc *desc;
156 resp = &hdev->mbx_resp;
157 crq = &hdev->hw.cmq.crq;
159 while (!hclgevf_cmd_crq_empty(&hdev->hw)) {
160 if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state)) {
161 dev_info(&hdev->pdev->dev, "vf crq need init\n");
165 desc = &crq->desc[crq->next_to_use];
166 req = (struct hclge_mbx_pf_to_vf_cmd *)desc->data;
168 flag = le16_to_cpu(crq->desc[crq->next_to_use].flag);
169 if (unlikely(!hnae3_get_bit(flag, HCLGEVF_CMDQ_RX_OUTVLD_B))) {
170 dev_warn(&hdev->pdev->dev,
171 "dropped invalid mailbox message, code = %d\n",
174 /* dropping/not processing this invalid message */
175 crq->desc[crq->next_to_use].flag = 0;
176 hclge_mbx_ring_ptr_move_crq(crq);
180 /* synchronous messages are time critical and need preferential
181 * treatment. Therefore, we need to acknowledge all the sync
182 * responses as quickly as possible so that waiting tasks do not
183 * timeout and simultaneously queue the async messages for later
184 * prcessing in context of mailbox task i.e. the slow path.
186 switch (req->msg[0]) {
187 case HCLGE_MBX_PF_VF_RESP:
188 if (resp->received_resp)
189 dev_warn(&hdev->pdev->dev,
190 "VF mbx resp flag not clear(%d)\n",
192 resp->received_resp = true;
194 resp->origin_mbx_msg = (req->msg[1] << 16);
195 resp->origin_mbx_msg |= req->msg[2];
196 resp->resp_status = req->msg[3];
198 temp = (u8 *)&req->msg[4];
199 for (i = 0; i < HCLGE_MBX_MAX_RESP_DATA_SIZE; i++) {
200 resp->additional_info[i] = *temp;
204 case HCLGE_MBX_LINK_STAT_CHANGE:
205 case HCLGE_MBX_ASSERTING_RESET:
206 case HCLGE_MBX_LINK_STAT_MODE:
207 case HCLGE_MBX_PUSH_VLAN_INFO:
208 /* set this mbx event as pending. This is required as we
209 * might loose interrupt event when mbx task is busy
210 * handling. This shall be cleared when mbx task just
211 * enters handling state.
213 hdev->mbx_event_pending = true;
215 /* we will drop the async msg if we find ARQ as full
216 * and continue with next message
218 if (atomic_read(&hdev->arq.count) >=
219 HCLGE_MBX_MAX_ARQ_MSG_NUM) {
220 dev_warn(&hdev->pdev->dev,
221 "Async Q full, dropping msg(%d)\n",
226 /* tail the async message in arq */
227 msg_q = hdev->arq.msg_q[hdev->arq.tail];
228 memcpy(&msg_q[0], req->msg,
229 HCLGE_MBX_MAX_ARQ_MSG_SIZE * sizeof(u16));
230 hclge_mbx_tail_ptr_move_arq(hdev->arq);
231 atomic_inc(&hdev->arq.count);
233 hclgevf_mbx_task_schedule(hdev);
237 dev_err(&hdev->pdev->dev,
238 "VF received unsupported(%d) mbx msg from PF\n",
242 crq->desc[crq->next_to_use].flag = 0;
243 hclge_mbx_ring_ptr_move_crq(crq);
246 /* Write back CMDQ_RQ header pointer, M7 need this pointer */
247 hclgevf_write_dev(&hdev->hw, HCLGEVF_NIC_CRQ_HEAD_REG,
251 void hclgevf_mbx_async_handler(struct hclgevf_dev *hdev)
253 enum hnae3_reset_type reset_type;
254 u16 link_status, state;
255 u16 *msg_q, *vlan_info;
261 /* we can safely clear it now as we are at start of the async message
264 hdev->mbx_event_pending = false;
266 tail = hdev->arq.tail;
268 /* process all the async queue messages */
269 while (tail != hdev->arq.head) {
270 if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state)) {
271 dev_info(&hdev->pdev->dev,
272 "vf crq need init in async\n");
276 msg_q = hdev->arq.msg_q[hdev->arq.head];
279 case HCLGE_MBX_LINK_STAT_CHANGE:
280 link_status = le16_to_cpu(msg_q[1]);
281 memcpy(&speed, &msg_q[2], sizeof(speed));
282 duplex = (u8)le16_to_cpu(msg_q[4]);
284 /* update upper layer with new link link status */
285 hclgevf_update_link_status(hdev, link_status);
286 hclgevf_update_speed_duplex(hdev, speed, duplex);
289 case HCLGE_MBX_LINK_STAT_MODE:
290 idx = (u8)le16_to_cpu(msg_q[1]);
292 memcpy(&hdev->hw.mac.supported, &msg_q[2],
293 sizeof(unsigned long));
295 memcpy(&hdev->hw.mac.advertising, &msg_q[2],
296 sizeof(unsigned long));
298 case HCLGE_MBX_ASSERTING_RESET:
299 /* PF has asserted reset hence VF should go in pending
300 * state and poll for the hardware reset status till it
301 * has been completely reset. After this stack should
302 * eventually be re-initialized.
304 reset_type = le16_to_cpu(msg_q[1]);
305 set_bit(reset_type, &hdev->reset_pending);
306 set_bit(HCLGEVF_RESET_PENDING, &hdev->reset_state);
307 hclgevf_reset_task_schedule(hdev);
310 case HCLGE_MBX_PUSH_VLAN_INFO:
311 state = le16_to_cpu(msg_q[1]);
312 vlan_info = &msg_q[1];
313 hclgevf_update_port_base_vlan_info(hdev, state,
317 dev_err(&hdev->pdev->dev,
318 "fetched unsupported(%d) message from arq\n",
323 hclge_mbx_head_ptr_move_arq(hdev->arq);
324 atomic_dec(&hdev->arq.count);
325 msg_q = hdev->arq.msg_q[hdev->arq.head];