1 // SPDX-License-Identifier: GPL-2.0
2 /* Marvell Octeon EP (EndPoint) Ethernet Driver
3 *
4 * Copyright (C) 2020 Marvell.
5 *
6 */
7
8 #include <linux/types.h>
9 #include <linux/errno.h>
10 #include <linux/string.h>
11 #include <linux/mutex.h>
12 #include <linux/jiffies.h>
13 #include <linux/sched.h>
14 #include <linux/sched/signal.h>
15 #include <linux/io.h>
16 #include <linux/pci.h>
17 #include <linux/etherdevice.h>
18 #include <linux/vmalloc.h>
19
20 #include "octep_config.h"
21 #include "octep_main.h"
22 #include "octep_pfvf_mbox.h"
23 #include "octep_ctrl_net.h"
24
25 /* When a new command is implemented, the below table should be updated
26 * with new command and it's version info.
27 */
28 static u32 pfvf_cmd_versions[OCTEP_PFVF_MBOX_CMD_MAX] = {
29 [0 ... OCTEP_PFVF_MBOX_CMD_DEV_REMOVE] = OCTEP_PFVF_MBOX_VERSION_V1,
30 [OCTEP_PFVF_MBOX_CMD_GET_FW_INFO ... OCTEP_PFVF_MBOX_NOTIF_LINK_STATUS] =
31 OCTEP_PFVF_MBOX_VERSION_V2
32 };
33
octep_pfvf_validate_version(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)34 static void octep_pfvf_validate_version(struct octep_device *oct, u32 vf_id,
35 union octep_pfvf_mbox_word cmd,
36 union octep_pfvf_mbox_word *rsp)
37 {
38 u32 vf_version = (u32)cmd.s_version.version;
39
40 dev_dbg(&oct->pdev->dev, "VF id:%d VF version:%d PF version:%d\n",
41 vf_id, vf_version, OCTEP_PFVF_MBOX_VERSION_CURRENT);
42 if (vf_version < OCTEP_PFVF_MBOX_VERSION_CURRENT)
43 rsp->s_version.version = vf_version;
44 else
45 rsp->s_version.version = OCTEP_PFVF_MBOX_VERSION_CURRENT;
46
47 oct->vf_info[vf_id].mbox_version = rsp->s_version.version;
48 dev_dbg(&oct->pdev->dev, "VF id:%d negotiated VF version:%d\n",
49 vf_id, oct->vf_info[vf_id].mbox_version);
50
51 rsp->s_version.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
52 }
53
octep_pfvf_get_link_status(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)54 static void octep_pfvf_get_link_status(struct octep_device *oct, u32 vf_id,
55 union octep_pfvf_mbox_word cmd,
56 union octep_pfvf_mbox_word *rsp)
57 {
58 int status;
59
60 status = octep_ctrl_net_get_link_status(oct, vf_id);
61 if (status < 0) {
62 rsp->s_link_status.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
63 dev_err(&oct->pdev->dev, "Get VF link status failed via host control Mbox\n");
64 return;
65 }
66 rsp->s_link_status.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
67 rsp->s_link_status.status = status;
68 }
69
octep_pfvf_set_link_status(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)70 static void octep_pfvf_set_link_status(struct octep_device *oct, u32 vf_id,
71 union octep_pfvf_mbox_word cmd,
72 union octep_pfvf_mbox_word *rsp)
73 {
74 int err;
75
76 err = octep_ctrl_net_set_link_status(oct, vf_id, cmd.s_link_status.status, true);
77 if (err) {
78 rsp->s_link_status.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
79 dev_err(&oct->pdev->dev, "Set VF link status failed via host control Mbox\n");
80 return;
81 }
82 rsp->s_link_status.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
83 }
84
octep_pfvf_set_rx_state(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)85 static void octep_pfvf_set_rx_state(struct octep_device *oct, u32 vf_id,
86 union octep_pfvf_mbox_word cmd,
87 union octep_pfvf_mbox_word *rsp)
88 {
89 int err;
90
91 err = octep_ctrl_net_set_rx_state(oct, vf_id, cmd.s_link_state.state, true);
92 if (err) {
93 rsp->s_link_state.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
94 dev_err(&oct->pdev->dev, "Set VF Rx link state failed via host control Mbox\n");
95 return;
96 }
97 rsp->s_link_state.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
98 }
99
octep_send_notification(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd)100 static int octep_send_notification(struct octep_device *oct, u32 vf_id,
101 union octep_pfvf_mbox_word cmd)
102 {
103 u32 max_rings_per_vf, vf_mbox_queue;
104 struct octep_mbox *mbox;
105
106 /* check if VF PF Mailbox is compatible for this notification */
107 if (pfvf_cmd_versions[cmd.s.opcode] > oct->vf_info[vf_id].mbox_version) {
108 dev_dbg(&oct->pdev->dev, "VF Mbox doesn't support Notification:%d on VF ver:%d\n",
109 cmd.s.opcode, oct->vf_info[vf_id].mbox_version);
110 return -EOPNOTSUPP;
111 }
112
113 max_rings_per_vf = CFG_GET_MAX_RPVF(oct->conf);
114 vf_mbox_queue = vf_id * max_rings_per_vf;
115 if (!oct->mbox[vf_mbox_queue]) {
116 dev_err(&oct->pdev->dev, "Notif obtained for bad mbox vf %d\n", vf_id);
117 return -EINVAL;
118 }
119 mbox = oct->mbox[vf_mbox_queue];
120
121 mutex_lock(&mbox->lock);
122 writeq(cmd.u64, mbox->pf_vf_data_reg);
123 mutex_unlock(&mbox->lock);
124
125 return 0;
126 }
127
octep_pfvf_set_mtu(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)128 static void octep_pfvf_set_mtu(struct octep_device *oct, u32 vf_id,
129 union octep_pfvf_mbox_word cmd,
130 union octep_pfvf_mbox_word *rsp)
131 {
132 int err;
133
134 err = octep_ctrl_net_set_mtu(oct, vf_id, cmd.s_set_mtu.mtu, true);
135 if (err) {
136 rsp->s_set_mtu.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
137 dev_err(&oct->pdev->dev, "Set VF MTU failed via host control Mbox\n");
138 return;
139 }
140 rsp->s_set_mtu.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
141 }
142
octep_pfvf_get_mtu(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)143 static void octep_pfvf_get_mtu(struct octep_device *oct, u32 vf_id,
144 union octep_pfvf_mbox_word cmd,
145 union octep_pfvf_mbox_word *rsp)
146 {
147 int max_rx_pktlen = oct->netdev->max_mtu + (ETH_HLEN + ETH_FCS_LEN);
148
149 rsp->s_set_mtu.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
150 rsp->s_get_mtu.mtu = max_rx_pktlen;
151 }
152
octep_pfvf_set_mac_addr(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)153 static void octep_pfvf_set_mac_addr(struct octep_device *oct, u32 vf_id,
154 union octep_pfvf_mbox_word cmd,
155 union octep_pfvf_mbox_word *rsp)
156 {
157 int err;
158
159 err = octep_ctrl_net_set_mac_addr(oct, vf_id, cmd.s_set_mac.mac_addr, true);
160 if (err) {
161 rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
162 dev_err(&oct->pdev->dev, "Set VF MAC address failed via host control Mbox\n");
163 return;
164 }
165 rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
166 }
167
octep_pfvf_get_mac_addr(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)168 static void octep_pfvf_get_mac_addr(struct octep_device *oct, u32 vf_id,
169 union octep_pfvf_mbox_word cmd,
170 union octep_pfvf_mbox_word *rsp)
171 {
172 int err;
173
174 err = octep_ctrl_net_get_mac_addr(oct, vf_id, rsp->s_set_mac.mac_addr);
175 if (err) {
176 rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
177 dev_err(&oct->pdev->dev, "Get VF MAC address failed via host control Mbox\n");
178 return;
179 }
180 ether_addr_copy(oct->vf_info[vf_id].mac_addr, rsp->s_set_mac.mac_addr);
181 rsp->s_set_mac.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
182 }
183
octep_pfvf_dev_remove(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)184 static void octep_pfvf_dev_remove(struct octep_device *oct, u32 vf_id,
185 union octep_pfvf_mbox_word cmd,
186 union octep_pfvf_mbox_word *rsp)
187 {
188 int err;
189
190 /* Reset VF-specific information maintained by the PF */
191 memset(&oct->vf_info[vf_id], 0, sizeof(struct octep_pfvf_info));
192 err = octep_ctrl_net_dev_remove(oct, vf_id);
193 if (err) {
194 rsp->s.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
195 dev_err(&oct->pdev->dev, "Failed to acknowledge fw of vf %d removal\n",
196 vf_id);
197 return;
198 }
199 rsp->s.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
200 }
201
octep_pfvf_get_fw_info(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)202 static void octep_pfvf_get_fw_info(struct octep_device *oct, u32 vf_id,
203 union octep_pfvf_mbox_word cmd,
204 union octep_pfvf_mbox_word *rsp)
205 {
206 struct octep_fw_info fw_info;
207 int err;
208
209 err = octep_ctrl_net_get_info(oct, vf_id, &fw_info);
210 if (err) {
211 rsp->s_fw_info.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
212 dev_err(&oct->pdev->dev, "Get VF info failed via host control Mbox\n");
213 return;
214 }
215
216 rsp->s_fw_info.pkind = fw_info.pkind;
217 rsp->s_fw_info.fsz = fw_info.fsz;
218 rsp->s_fw_info.rx_ol_flags = fw_info.rx_ol_flags;
219 rsp->s_fw_info.tx_ol_flags = fw_info.tx_ol_flags;
220
221 rsp->s_fw_info.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
222 }
223
octep_pfvf_set_offloads(struct octep_device * oct,u32 vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)224 static void octep_pfvf_set_offloads(struct octep_device *oct, u32 vf_id,
225 union octep_pfvf_mbox_word cmd,
226 union octep_pfvf_mbox_word *rsp)
227 {
228 struct octep_ctrl_net_offloads offloads = {
229 .rx_offloads = cmd.s_offloads.rx_ol_flags,
230 .tx_offloads = cmd.s_offloads.tx_ol_flags
231 };
232 int err;
233
234 err = octep_ctrl_net_set_offloads(oct, vf_id, &offloads, true);
235 if (err) {
236 rsp->s_offloads.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
237 dev_err(&oct->pdev->dev, "Set VF offloads failed via host control Mbox\n");
238 return;
239 }
240 rsp->s_offloads.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
241 }
242
octep_setup_pfvf_mbox(struct octep_device * oct)243 int octep_setup_pfvf_mbox(struct octep_device *oct)
244 {
245 int i = 0, num_vfs = 0, rings_per_vf = 0;
246 int ring = 0;
247
248 num_vfs = oct->conf->sriov_cfg.active_vfs;
249 rings_per_vf = oct->conf->sriov_cfg.max_rings_per_vf;
250
251 for (i = 0; i < num_vfs; i++) {
252 ring = rings_per_vf * i;
253 oct->mbox[ring] = vzalloc(sizeof(*oct->mbox[ring]));
254
255 if (!oct->mbox[ring])
256 goto free_mbox;
257
258 memset(oct->mbox[ring], 0, sizeof(struct octep_mbox));
259 memset(&oct->vf_info[i], 0, sizeof(struct octep_pfvf_info));
260 mutex_init(&oct->mbox[ring]->lock);
261 INIT_WORK(&oct->mbox[ring]->wk.work, octep_pfvf_mbox_work);
262 oct->mbox[ring]->wk.ctxptr = oct->mbox[ring];
263 oct->mbox[ring]->oct = oct;
264 oct->mbox[ring]->vf_id = i;
265 oct->hw_ops.setup_mbox_regs(oct, ring);
266 }
267 return 0;
268
269 free_mbox:
270 while (i) {
271 i--;
272 ring = rings_per_vf * i;
273 cancel_work_sync(&oct->mbox[ring]->wk.work);
274 mutex_destroy(&oct->mbox[ring]->lock);
275 vfree(oct->mbox[ring]);
276 oct->mbox[ring] = NULL;
277 }
278 return -ENOMEM;
279 }
280
octep_delete_pfvf_mbox(struct octep_device * oct)281 void octep_delete_pfvf_mbox(struct octep_device *oct)
282 {
283 int rings_per_vf = oct->conf->sriov_cfg.max_rings_per_vf;
284 int num_vfs = oct->conf->sriov_cfg.active_vfs;
285 int i = 0, ring = 0, vf_srn = 0;
286
287 for (i = 0; i < num_vfs; i++) {
288 ring = vf_srn + rings_per_vf * i;
289 if (!oct->mbox[ring])
290 continue;
291
292 if (work_pending(&oct->mbox[ring]->wk.work))
293 cancel_work_sync(&oct->mbox[ring]->wk.work);
294
295 mutex_destroy(&oct->mbox[ring]->lock);
296 vfree(oct->mbox[ring]);
297 oct->mbox[ring] = NULL;
298 }
299 }
300
octep_pfvf_pf_get_data(struct octep_device * oct,struct octep_mbox * mbox,int vf_id,union octep_pfvf_mbox_word cmd,union octep_pfvf_mbox_word * rsp)301 static void octep_pfvf_pf_get_data(struct octep_device *oct,
302 struct octep_mbox *mbox, int vf_id,
303 union octep_pfvf_mbox_word cmd,
304 union octep_pfvf_mbox_word *rsp)
305 {
306 int length = 0;
307 int i = 0;
308 int err;
309 struct octep_iface_link_info link_info;
310 struct octep_iface_rx_stats rx_stats;
311 struct octep_iface_tx_stats tx_stats;
312
313 rsp->s_data.type = OCTEP_PFVF_MBOX_TYPE_RSP_ACK;
314
315 if (cmd.s_data.frag != OCTEP_PFVF_MBOX_MORE_FRAG_FLAG) {
316 mbox->config_data_index = 0;
317 memset(mbox->config_data, 0, MAX_VF_PF_MBOX_DATA_SIZE);
318 /* Based on the OPCODE CMD the PF driver
319 * specific API should be called to fetch
320 * the requested data
321 */
322 switch (cmd.s.opcode) {
323 case OCTEP_PFVF_MBOX_CMD_GET_LINK_INFO:
324 memset(&link_info, 0, sizeof(link_info));
325 err = octep_ctrl_net_get_link_info(oct, vf_id, &link_info);
326 if (!err) {
327 mbox->message_len = sizeof(link_info);
328 *((int32_t *)rsp->s_data.data) = mbox->message_len;
329 memcpy(mbox->config_data, (u8 *)&link_info, sizeof(link_info));
330 } else {
331 rsp->s_data.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
332 return;
333 }
334 break;
335 case OCTEP_PFVF_MBOX_CMD_GET_STATS:
336 memset(&rx_stats, 0, sizeof(rx_stats));
337 memset(&tx_stats, 0, sizeof(tx_stats));
338 err = octep_ctrl_net_get_if_stats(oct, vf_id, &rx_stats, &tx_stats);
339 if (!err) {
340 mbox->message_len = sizeof(rx_stats) + sizeof(tx_stats);
341 *((int32_t *)rsp->s_data.data) = mbox->message_len;
342 memcpy(mbox->config_data, (u8 *)&rx_stats, sizeof(rx_stats));
343 memcpy(mbox->config_data + sizeof(rx_stats), (u8 *)&tx_stats,
344 sizeof(tx_stats));
345
346 } else {
347 rsp->s_data.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
348 return;
349 }
350 break;
351 }
352 *((int32_t *)rsp->s_data.data) = mbox->message_len;
353 return;
354 }
355
356 if (mbox->message_len > OCTEP_PFVF_MBOX_MAX_DATA_SIZE)
357 length = OCTEP_PFVF_MBOX_MAX_DATA_SIZE;
358 else
359 length = mbox->message_len;
360
361 mbox->message_len -= length;
362
363 for (i = 0; i < length; i++) {
364 rsp->s_data.data[i] =
365 mbox->config_data[mbox->config_data_index];
366 mbox->config_data_index++;
367 }
368 }
369
octep_pfvf_notify(struct octep_device * oct,struct octep_ctrl_mbox_msg * msg)370 void octep_pfvf_notify(struct octep_device *oct, struct octep_ctrl_mbox_msg *msg)
371 {
372 union octep_pfvf_mbox_word notif = { 0 };
373 struct octep_ctrl_net_f2h_req *req;
374
375 req = (struct octep_ctrl_net_f2h_req *)msg->sg_list[0].msg;
376 switch (req->hdr.s.cmd) {
377 case OCTEP_CTRL_NET_F2H_CMD_LINK_STATUS:
378 notif.s_link_status.opcode = OCTEP_PFVF_MBOX_NOTIF_LINK_STATUS;
379 notif.s_link_status.status = req->link.state;
380 break;
381 default:
382 pr_info("Unknown mbox notif for vf: %u\n",
383 req->hdr.s.cmd);
384 return;
385 }
386
387 notif.s.type = OCTEP_PFVF_MBOX_TYPE_CMD;
388 octep_send_notification(oct, msg->hdr.s.vf_idx, notif);
389 }
390
octep_pfvf_mbox_work(struct work_struct * work)391 void octep_pfvf_mbox_work(struct work_struct *work)
392 {
393 struct octep_pfvf_mbox_wk *wk = container_of(work, struct octep_pfvf_mbox_wk, work);
394 union octep_pfvf_mbox_word cmd = { 0 };
395 union octep_pfvf_mbox_word rsp = { 0 };
396 struct octep_mbox *mbox = NULL;
397 struct octep_device *oct = NULL;
398 int vf_id;
399
400 mbox = (struct octep_mbox *)wk->ctxptr;
401 oct = (struct octep_device *)mbox->oct;
402 vf_id = mbox->vf_id;
403
404 mutex_lock(&mbox->lock);
405 cmd.u64 = readq(mbox->vf_pf_data_reg);
406 rsp.u64 = 0;
407
408 switch (cmd.s.opcode) {
409 case OCTEP_PFVF_MBOX_CMD_VERSION:
410 octep_pfvf_validate_version(oct, vf_id, cmd, &rsp);
411 break;
412 case OCTEP_PFVF_MBOX_CMD_GET_LINK_STATUS:
413 octep_pfvf_get_link_status(oct, vf_id, cmd, &rsp);
414 break;
415 case OCTEP_PFVF_MBOX_CMD_SET_LINK_STATUS:
416 octep_pfvf_set_link_status(oct, vf_id, cmd, &rsp);
417 break;
418 case OCTEP_PFVF_MBOX_CMD_SET_RX_STATE:
419 octep_pfvf_set_rx_state(oct, vf_id, cmd, &rsp);
420 break;
421 case OCTEP_PFVF_MBOX_CMD_SET_MTU:
422 octep_pfvf_set_mtu(oct, vf_id, cmd, &rsp);
423 break;
424 case OCTEP_PFVF_MBOX_CMD_SET_MAC_ADDR:
425 octep_pfvf_set_mac_addr(oct, vf_id, cmd, &rsp);
426 break;
427 case OCTEP_PFVF_MBOX_CMD_GET_MAC_ADDR:
428 octep_pfvf_get_mac_addr(oct, vf_id, cmd, &rsp);
429 break;
430 case OCTEP_PFVF_MBOX_CMD_GET_LINK_INFO:
431 case OCTEP_PFVF_MBOX_CMD_GET_STATS:
432 octep_pfvf_pf_get_data(oct, mbox, vf_id, cmd, &rsp);
433 break;
434 case OCTEP_PFVF_MBOX_CMD_GET_MTU:
435 octep_pfvf_get_mtu(oct, vf_id, cmd, &rsp);
436 break;
437 case OCTEP_PFVF_MBOX_CMD_DEV_REMOVE:
438 octep_pfvf_dev_remove(oct, vf_id, cmd, &rsp);
439 break;
440 case OCTEP_PFVF_MBOX_CMD_GET_FW_INFO:
441 octep_pfvf_get_fw_info(oct, vf_id, cmd, &rsp);
442 break;
443 case OCTEP_PFVF_MBOX_CMD_SET_OFFLOADS:
444 octep_pfvf_set_offloads(oct, vf_id, cmd, &rsp);
445 break;
446 default:
447 dev_err(&oct->pdev->dev, "PF-VF mailbox: invalid opcode %d\n", cmd.s.opcode);
448 rsp.s.type = OCTEP_PFVF_MBOX_TYPE_RSP_NACK;
449 break;
450 }
451 writeq(rsp.u64, mbox->vf_pf_data_reg);
452 mutex_unlock(&mbox->lock);
453 }
454