1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018-2019 Hisilicon Limited.
12 #include <rte_byteorder.h>
13 #include <rte_common.h>
14 #include <rte_cycles.h>
16 #include <rte_ethdev_driver.h>
18 #include <rte_spinlock.h>
20 #include <rte_bus_pci.h>
22 #include "hns3_ethdev.h"
23 #include "hns3_regs.h"
24 #include "hns3_logs.h"
26 #define HNS3_REG_MSG_DATA_OFFSET 4
27 #define HNS3_CMD_CODE_OFFSET 2
29 static const struct errno_respcode_map err_code_map[] = {
43 hns3_resp_to_errno(uint16_t resp_code)
47 num = sizeof(err_code_map) / sizeof(struct errno_respcode_map);
48 for (i = 0; i < num; i++) {
49 if (err_code_map[i].resp_code == resp_code)
50 return err_code_map[i].err_no;
57 hns3_poll_all_sync_msg(void)
59 struct rte_eth_dev *eth_dev;
60 struct hns3_adapter *adapter;
64 RTE_ETH_FOREACH_DEV(port_id) {
65 eth_dev = &rte_eth_devices[port_id];
66 name = eth_dev->device->driver->name;
67 if (strcmp(name, "net_hns3") && strcmp(name, "net_hns3_vf"))
69 adapter = eth_dev->data->dev_private;
70 if (!adapter || adapter->hw.adapter_state == HNS3_NIC_CLOSED)
72 /* Synchronous msg, the mbx_resp.req_msg_data is non-zero */
73 if (adapter->hw.mbx_resp.req_msg_data)
74 hns3_dev_handle_mbx_msg(&adapter->hw);
79 hns3_get_mbx_resp(struct hns3_hw *hw, uint16_t code0, uint16_t code1,
80 uint8_t *resp_data, uint16_t resp_len)
82 #define HNS3_MAX_RETRY_MS 500
83 struct hns3_mbx_resp_status *mbx_resp;
88 if (resp_len > HNS3_MBX_MAX_RESP_DATA_SIZE) {
89 hns3_err(hw, "VF mbx response len(=%d) exceeds maximum(=%d)",
90 resp_len, HNS3_MBX_MAX_RESP_DATA_SIZE);
94 now = get_timeofday_ms();
95 end = now + HNS3_MAX_RETRY_MS;
96 while ((hw->mbx_resp.head != hw->mbx_resp.tail + hw->mbx_resp.lost) &&
99 * The mbox response is running on the interrupt thread.
100 * Sending mbox in the interrupt thread cannot wait for the
101 * response, so polling the mbox response on the irq thread.
103 if (pthread_equal(hw->irq_thread_id, pthread_self())) {
105 hns3_poll_all_sync_msg();
107 rte_delay_ms(HNS3_POLL_RESPONE_MS);
109 now = get_timeofday_ms();
111 hw->mbx_resp.req_msg_data = 0;
115 "VF could not get mbx(%d,%d) head(%d) tail(%d) lost(%d) from PF in_irq:%d",
116 code0, code1, hw->mbx_resp.head, hw->mbx_resp.tail,
117 hw->mbx_resp.lost, in_irq);
121 mbx_resp = &hw->mbx_resp;
123 if (mbx_resp->resp_status)
124 return mbx_resp->resp_status;
127 memcpy(resp_data, &mbx_resp->additional_info[0], resp_len);
133 hns3_send_mbx_msg(struct hns3_hw *hw, uint16_t code, uint16_t subcode,
134 const uint8_t *msg_data, uint8_t msg_len, bool need_resp,
135 uint8_t *resp_data, uint16_t resp_len)
137 struct hns3_mbx_vf_to_pf_cmd *req;
138 struct hns3_cmd_desc desc;
141 req = (struct hns3_mbx_vf_to_pf_cmd *)desc.data;
143 /* first two bytes are reserved for code & subcode */
144 if (msg_len > (HNS3_MBX_MAX_MSG_SIZE - HNS3_CMD_CODE_OFFSET)) {
146 "VF send mbx msg fail, msg len %d exceeds max payload len %d",
147 msg_len, HNS3_MBX_MAX_MSG_SIZE - HNS3_CMD_CODE_OFFSET);
151 hns3_cmd_setup_basic_desc(&desc, HNS3_OPC_MBX_VF_TO_PF, false);
153 req->msg[1] = subcode;
155 memcpy(&req->msg[HNS3_CMD_CODE_OFFSET], msg_data, msg_len);
157 /* synchronous send */
159 req->mbx_need_resp |= HNS3_MBX_NEED_RESP_BIT;
160 rte_spinlock_lock(&hw->mbx_resp.lock);
161 hw->mbx_resp.req_msg_data = (uint32_t)code << 16 | subcode;
163 ret = hns3_cmd_send(hw, &desc, 1);
165 rte_spinlock_unlock(&hw->mbx_resp.lock);
166 hns3_err(hw, "VF failed(=%d) to send mbx message to PF",
171 ret = hns3_get_mbx_resp(hw, code, subcode, resp_data, resp_len);
172 rte_spinlock_unlock(&hw->mbx_resp.lock);
174 /* asynchronous send */
175 ret = hns3_cmd_send(hw, &desc, 1);
177 hns3_err(hw, "VF failed(=%d) to send mbx message to PF",
187 hns3_cmd_crq_empty(struct hns3_hw *hw)
189 uint32_t tail = hns3_read_dev(hw, HNS3_CMDQ_RX_TAIL_REG);
191 return tail == hw->cmq.crq.next_to_use;
195 hns3_mbx_handler(struct hns3_hw *hw)
197 struct hns3_mac *mac = &hw->mac;
198 enum hns3_reset_level reset_level;
204 /* process all the async queue messages */
205 while (tail != hw->arq.head) {
206 msg_q = hw->arq.msg_q[hw->arq.head];
209 case HNS3_MBX_LINK_STAT_CHANGE:
210 memcpy(&mac->link_speed, &msg_q[2],
211 sizeof(mac->link_speed));
212 mac->link_status = rte_le_to_cpu_16(msg_q[1]);
213 mac->link_duplex = (uint8_t)rte_le_to_cpu_16(msg_q[4]);
215 case HNS3_MBX_ASSERTING_RESET:
216 /* PF has asserted reset hence VF should go in pending
217 * state and poll for the hardware reset status till it
218 * has been completely reset. After this stack should
219 * eventually be re-initialized.
221 reset_level = rte_le_to_cpu_16(msg_q[1]);
222 hns3_atomic_set_bit(reset_level, &hw->reset.pending);
224 hns3_warn(hw, "PF inform reset level %d", reset_level);
225 hw->reset.stats.request_cnt++;
228 hns3_err(hw, "Fetched unsupported(%d) message from arq",
233 hns3_mbx_head_ptr_move_arq(hw->arq);
234 msg_q = hw->arq.msg_q[hw->arq.head];
239 * Case1: receive response after timeout, req_msg_data
240 * is 0, not equal resp_msg, do lost--
241 * Case2: receive last response during new send_mbx_msg,
242 * req_msg_data is different with resp_msg, let
243 * lost--, continue to wait for response.
246 hns3_update_resp_position(struct hns3_hw *hw, uint32_t resp_msg)
248 struct hns3_mbx_resp_status *resp = &hw->mbx_resp;
249 uint32_t tail = resp->tail + 1;
251 if (tail > resp->head)
253 if (resp->req_msg_data != resp_msg) {
256 hns3_warn(hw, "Received a mismatched response req_msg(%x) "
257 "resp_msg(%x) head(%d) tail(%d) lost(%d)",
258 resp->req_msg_data, resp_msg, resp->head, tail,
260 } else if (tail + resp->lost > resp->head) {
262 hns3_warn(hw, "Received a new response again resp_msg(%x) "
263 "head(%d) tail(%d) lost(%d)", resp_msg,
264 resp->head, tail, resp->lost);
271 hns3_dev_handle_mbx_msg(struct hns3_hw *hw)
273 struct hns3_mbx_resp_status *resp = &hw->mbx_resp;
274 struct hns3_cmq_ring *crq = &hw->cmq.crq;
275 struct hns3_mbx_pf_to_vf_cmd *req;
276 struct hns3_cmd_desc *desc;
283 while (!hns3_cmd_crq_empty(hw)) {
284 if (rte_atomic16_read(&hw->reset.disable_cmd))
287 desc = &crq->desc[crq->next_to_use];
288 req = (struct hns3_mbx_pf_to_vf_cmd *)desc->data;
290 flag = rte_le_to_cpu_16(crq->desc[crq->next_to_use].flag);
291 if (unlikely(!hns3_get_bit(flag, HNS3_CMDQ_RX_OUTVLD_B))) {
293 "dropped invalid mailbox message, code = %d",
296 /* dropping/not processing this invalid message */
297 crq->desc[crq->next_to_use].flag = 0;
298 hns3_mbx_ring_ptr_move_crq(crq);
302 switch (req->msg[0]) {
303 case HNS3_MBX_PF_VF_RESP:
304 resp->resp_status = hns3_resp_to_errno(req->msg[3]);
306 temp = (uint8_t *)&req->msg[4];
307 for (i = 0; i < HNS3_MBX_MAX_RESP_DATA_SIZE &&
308 i < HNS3_REG_MSG_DATA_OFFSET; i++) {
309 resp->additional_info[i] = *temp;
312 msg_data = (uint32_t)req->msg[1] << 16 | req->msg[2];
313 hns3_update_resp_position(hw, msg_data);
315 case HNS3_MBX_LINK_STAT_CHANGE:
316 case HNS3_MBX_ASSERTING_RESET:
317 msg_q = hw->arq.msg_q[hw->arq.tail];
318 memcpy(&msg_q[0], req->msg,
319 HNS3_MBX_MAX_ARQ_MSG_SIZE * sizeof(uint16_t));
320 hns3_mbx_tail_ptr_move_arq(hw->arq);
322 hns3_mbx_handler(hw);
326 "VF received unsupported(%d) mbx msg from PF",
331 crq->desc[crq->next_to_use].flag = 0;
332 hns3_mbx_ring_ptr_move_crq(crq);
335 /* Write back CMDQ_RQ header pointer, IMP need this pointer */
336 hns3_write_dev(hw, HNS3_CMDQ_RX_HEAD_REG, crq->next_to_use);