Commit | Line | Data |
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4863dea3 SG |
1 | /* |
2 | * Copyright (C) 2015 Cavium, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License | |
6 | * as published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/interrupt.h> | |
11 | #include <linux/pci.h> | |
12 | #include <linux/netdevice.h> | |
13 | #include <linux/etherdevice.h> | |
14 | #include <linux/ethtool.h> | |
15 | #include <linux/log2.h> | |
16 | #include <linux/prefetch.h> | |
17 | #include <linux/irq.h> | |
18 | ||
19 | #include "nic_reg.h" | |
20 | #include "nic.h" | |
21 | #include "nicvf_queues.h" | |
22 | #include "thunder_bgx.h" | |
23 | ||
24 | #define DRV_NAME "thunder-nicvf" | |
25 | #define DRV_VERSION "1.0" | |
26 | ||
27 | /* Supported devices */ | |
28 | static const struct pci_device_id nicvf_id_table[] = { | |
29 | { PCI_DEVICE_SUB(PCI_VENDOR_ID_CAVIUM, | |
30 | PCI_DEVICE_ID_THUNDER_NIC_VF, | |
31 | PCI_VENDOR_ID_CAVIUM, 0xA11E) }, | |
32 | { PCI_DEVICE_SUB(PCI_VENDOR_ID_CAVIUM, | |
33 | PCI_DEVICE_ID_THUNDER_PASS1_NIC_VF, | |
34 | PCI_VENDOR_ID_CAVIUM, 0xA11E) }, | |
35 | { 0, } /* end of table */ | |
36 | }; | |
37 | ||
38 | MODULE_AUTHOR("Sunil Goutham"); | |
39 | MODULE_DESCRIPTION("Cavium Thunder NIC Virtual Function Driver"); | |
40 | MODULE_LICENSE("GPL v2"); | |
41 | MODULE_VERSION(DRV_VERSION); | |
42 | MODULE_DEVICE_TABLE(pci, nicvf_id_table); | |
43 | ||
44 | static int debug = 0x00; | |
45 | module_param(debug, int, 0644); | |
46 | MODULE_PARM_DESC(debug, "Debug message level bitmap"); | |
47 | ||
48 | static int cpi_alg = CPI_ALG_NONE; | |
49 | module_param(cpi_alg, int, S_IRUGO); | |
50 | MODULE_PARM_DESC(cpi_alg, | |
51 | "PFC algorithm (0=none, 1=VLAN, 2=VLAN16, 3=IP Diffserv)"); | |
52 | ||
4863dea3 SG |
53 | static inline void nicvf_set_rx_frame_cnt(struct nicvf *nic, |
54 | struct sk_buff *skb) | |
55 | { | |
56 | if (skb->len <= 64) | |
57 | nic->drv_stats.rx_frames_64++; | |
58 | else if (skb->len <= 127) | |
59 | nic->drv_stats.rx_frames_127++; | |
60 | else if (skb->len <= 255) | |
61 | nic->drv_stats.rx_frames_255++; | |
62 | else if (skb->len <= 511) | |
63 | nic->drv_stats.rx_frames_511++; | |
64 | else if (skb->len <= 1023) | |
65 | nic->drv_stats.rx_frames_1023++; | |
66 | else if (skb->len <= 1518) | |
67 | nic->drv_stats.rx_frames_1518++; | |
68 | else | |
69 | nic->drv_stats.rx_frames_jumbo++; | |
70 | } | |
71 | ||
72 | /* The Cavium ThunderX network controller can *only* be found in SoCs | |
73 | * containing the ThunderX ARM64 CPU implementation. All accesses to the device | |
74 | * registers on this platform are implicitly strongly ordered with respect | |
75 | * to memory accesses. So writeq_relaxed() and readq_relaxed() are safe to use | |
76 | * with no memory barriers in this driver. The readq()/writeq() functions add | |
77 | * explicit ordering operation which in this case are redundant, and only | |
78 | * add overhead. | |
79 | */ | |
80 | ||
81 | /* Register read/write APIs */ | |
82 | void nicvf_reg_write(struct nicvf *nic, u64 offset, u64 val) | |
83 | { | |
84 | writeq_relaxed(val, nic->reg_base + offset); | |
85 | } | |
86 | ||
87 | u64 nicvf_reg_read(struct nicvf *nic, u64 offset) | |
88 | { | |
89 | return readq_relaxed(nic->reg_base + offset); | |
90 | } | |
91 | ||
92 | void nicvf_queue_reg_write(struct nicvf *nic, u64 offset, | |
93 | u64 qidx, u64 val) | |
94 | { | |
95 | void __iomem *addr = nic->reg_base + offset; | |
96 | ||
97 | writeq_relaxed(val, addr + (qidx << NIC_Q_NUM_SHIFT)); | |
98 | } | |
99 | ||
100 | u64 nicvf_queue_reg_read(struct nicvf *nic, u64 offset, u64 qidx) | |
101 | { | |
102 | void __iomem *addr = nic->reg_base + offset; | |
103 | ||
104 | return readq_relaxed(addr + (qidx << NIC_Q_NUM_SHIFT)); | |
105 | } | |
106 | ||
107 | /* VF -> PF mailbox communication */ | |
2cd2a196 AM |
108 | static void nicvf_write_to_mbx(struct nicvf *nic, union nic_mbx *mbx) |
109 | { | |
110 | u64 *msg = (u64 *)mbx; | |
111 | ||
112 | nicvf_reg_write(nic, NIC_VF_PF_MAILBOX_0_1 + 0, msg[0]); | |
113 | nicvf_reg_write(nic, NIC_VF_PF_MAILBOX_0_1 + 8, msg[1]); | |
114 | } | |
115 | ||
4863dea3 SG |
116 | int nicvf_send_msg_to_pf(struct nicvf *nic, union nic_mbx *mbx) |
117 | { | |
118 | int timeout = NIC_MBOX_MSG_TIMEOUT; | |
119 | int sleep = 10; | |
4863dea3 SG |
120 | |
121 | nic->pf_acked = false; | |
122 | nic->pf_nacked = false; | |
123 | ||
2cd2a196 | 124 | nicvf_write_to_mbx(nic, mbx); |
4863dea3 SG |
125 | |
126 | /* Wait for previous message to be acked, timeout 2sec */ | |
127 | while (!nic->pf_acked) { | |
128 | if (nic->pf_nacked) | |
129 | return -EINVAL; | |
130 | msleep(sleep); | |
131 | if (nic->pf_acked) | |
132 | break; | |
133 | timeout -= sleep; | |
134 | if (!timeout) { | |
135 | netdev_err(nic->netdev, | |
136 | "PF didn't ack to mbox msg %d from VF%d\n", | |
137 | (mbx->msg.msg & 0xFF), nic->vf_id); | |
138 | return -EBUSY; | |
139 | } | |
140 | } | |
141 | return 0; | |
142 | } | |
143 | ||
144 | /* Checks if VF is able to comminicate with PF | |
145 | * and also gets the VNIC number this VF is associated to. | |
146 | */ | |
147 | static int nicvf_check_pf_ready(struct nicvf *nic) | |
148 | { | |
2cd2a196 AM |
149 | union nic_mbx mbx = {}; |
150 | ||
151 | mbx.msg.msg = NIC_MBOX_MSG_READY; | |
6051cba7 SG |
152 | if (nicvf_send_msg_to_pf(nic, &mbx)) { |
153 | netdev_err(nic->netdev, | |
154 | "PF didn't respond to READY msg\n"); | |
155 | return 0; | |
4863dea3 | 156 | } |
6051cba7 | 157 | |
4863dea3 SG |
158 | return 1; |
159 | } | |
160 | ||
fd7ec062 AM |
161 | static void nicvf_read_bgx_stats(struct nicvf *nic, struct bgx_stats_msg *bgx) |
162 | { | |
163 | if (bgx->rx) | |
164 | nic->bgx_stats.rx_stats[bgx->idx] = bgx->stats; | |
165 | else | |
166 | nic->bgx_stats.tx_stats[bgx->idx] = bgx->stats; | |
167 | } | |
168 | ||
4863dea3 SG |
169 | static void nicvf_handle_mbx_intr(struct nicvf *nic) |
170 | { | |
171 | union nic_mbx mbx = {}; | |
172 | u64 *mbx_data; | |
173 | u64 mbx_addr; | |
174 | int i; | |
175 | ||
176 | mbx_addr = NIC_VF_PF_MAILBOX_0_1; | |
177 | mbx_data = (u64 *)&mbx; | |
178 | ||
179 | for (i = 0; i < NIC_PF_VF_MAILBOX_SIZE; i++) { | |
180 | *mbx_data = nicvf_reg_read(nic, mbx_addr); | |
181 | mbx_data++; | |
182 | mbx_addr += sizeof(u64); | |
183 | } | |
184 | ||
185 | netdev_dbg(nic->netdev, "Mbox message: msg: 0x%x\n", mbx.msg.msg); | |
186 | switch (mbx.msg.msg) { | |
187 | case NIC_MBOX_MSG_READY: | |
6051cba7 | 188 | nic->pf_acked = true; |
4863dea3 SG |
189 | nic->vf_id = mbx.nic_cfg.vf_id & 0x7F; |
190 | nic->tns_mode = mbx.nic_cfg.tns_mode & 0x7F; | |
191 | nic->node = mbx.nic_cfg.node_id; | |
bd049a90 PF |
192 | if (!nic->set_mac_pending) |
193 | ether_addr_copy(nic->netdev->dev_addr, | |
194 | mbx.nic_cfg.mac_addr); | |
4863dea3 SG |
195 | nic->link_up = false; |
196 | nic->duplex = 0; | |
197 | nic->speed = 0; | |
198 | break; | |
199 | case NIC_MBOX_MSG_ACK: | |
200 | nic->pf_acked = true; | |
201 | break; | |
202 | case NIC_MBOX_MSG_NACK: | |
203 | nic->pf_nacked = true; | |
204 | break; | |
205 | case NIC_MBOX_MSG_RSS_SIZE: | |
206 | nic->rss_info.rss_size = mbx.rss_size.ind_tbl_size; | |
207 | nic->pf_acked = true; | |
208 | break; | |
209 | case NIC_MBOX_MSG_BGX_STATS: | |
210 | nicvf_read_bgx_stats(nic, &mbx.bgx_stats); | |
211 | nic->pf_acked = true; | |
4863dea3 SG |
212 | break; |
213 | case NIC_MBOX_MSG_BGX_LINK_CHANGE: | |
214 | nic->pf_acked = true; | |
215 | nic->link_up = mbx.link_status.link_up; | |
216 | nic->duplex = mbx.link_status.duplex; | |
217 | nic->speed = mbx.link_status.speed; | |
218 | if (nic->link_up) { | |
219 | netdev_info(nic->netdev, "%s: Link is Up %d Mbps %s\n", | |
220 | nic->netdev->name, nic->speed, | |
221 | nic->duplex == DUPLEX_FULL ? | |
222 | "Full duplex" : "Half duplex"); | |
223 | netif_carrier_on(nic->netdev); | |
b49087dd | 224 | netif_tx_start_all_queues(nic->netdev); |
4863dea3 SG |
225 | } else { |
226 | netdev_info(nic->netdev, "%s: Link is Down\n", | |
227 | nic->netdev->name); | |
228 | netif_carrier_off(nic->netdev); | |
229 | netif_tx_stop_all_queues(nic->netdev); | |
230 | } | |
231 | break; | |
232 | default: | |
233 | netdev_err(nic->netdev, | |
234 | "Invalid message from PF, msg 0x%x\n", mbx.msg.msg); | |
235 | break; | |
236 | } | |
237 | nicvf_clear_intr(nic, NICVF_INTR_MBOX, 0); | |
238 | } | |
239 | ||
240 | static int nicvf_hw_set_mac_addr(struct nicvf *nic, struct net_device *netdev) | |
241 | { | |
242 | union nic_mbx mbx = {}; | |
4863dea3 SG |
243 | |
244 | mbx.mac.msg = NIC_MBOX_MSG_SET_MAC; | |
245 | mbx.mac.vf_id = nic->vf_id; | |
e610cb32 | 246 | ether_addr_copy(mbx.mac.mac_addr, netdev->dev_addr); |
4863dea3 SG |
247 | |
248 | return nicvf_send_msg_to_pf(nic, &mbx); | |
249 | } | |
250 | ||
fd7ec062 | 251 | static void nicvf_config_cpi(struct nicvf *nic) |
4863dea3 SG |
252 | { |
253 | union nic_mbx mbx = {}; | |
254 | ||
255 | mbx.cpi_cfg.msg = NIC_MBOX_MSG_CPI_CFG; | |
256 | mbx.cpi_cfg.vf_id = nic->vf_id; | |
257 | mbx.cpi_cfg.cpi_alg = nic->cpi_alg; | |
258 | mbx.cpi_cfg.rq_cnt = nic->qs->rq_cnt; | |
259 | ||
260 | nicvf_send_msg_to_pf(nic, &mbx); | |
261 | } | |
262 | ||
fd7ec062 | 263 | static void nicvf_get_rss_size(struct nicvf *nic) |
4863dea3 SG |
264 | { |
265 | union nic_mbx mbx = {}; | |
266 | ||
267 | mbx.rss_size.msg = NIC_MBOX_MSG_RSS_SIZE; | |
268 | mbx.rss_size.vf_id = nic->vf_id; | |
269 | nicvf_send_msg_to_pf(nic, &mbx); | |
270 | } | |
271 | ||
272 | void nicvf_config_rss(struct nicvf *nic) | |
273 | { | |
274 | union nic_mbx mbx = {}; | |
275 | struct nicvf_rss_info *rss = &nic->rss_info; | |
276 | int ind_tbl_len = rss->rss_size; | |
277 | int i, nextq = 0; | |
278 | ||
279 | mbx.rss_cfg.vf_id = nic->vf_id; | |
280 | mbx.rss_cfg.hash_bits = rss->hash_bits; | |
281 | while (ind_tbl_len) { | |
282 | mbx.rss_cfg.tbl_offset = nextq; | |
283 | mbx.rss_cfg.tbl_len = min(ind_tbl_len, | |
284 | RSS_IND_TBL_LEN_PER_MBX_MSG); | |
285 | mbx.rss_cfg.msg = mbx.rss_cfg.tbl_offset ? | |
286 | NIC_MBOX_MSG_RSS_CFG_CONT : NIC_MBOX_MSG_RSS_CFG; | |
287 | ||
288 | for (i = 0; i < mbx.rss_cfg.tbl_len; i++) | |
289 | mbx.rss_cfg.ind_tbl[i] = rss->ind_tbl[nextq++]; | |
290 | ||
291 | nicvf_send_msg_to_pf(nic, &mbx); | |
292 | ||
293 | ind_tbl_len -= mbx.rss_cfg.tbl_len; | |
294 | } | |
295 | } | |
296 | ||
297 | void nicvf_set_rss_key(struct nicvf *nic) | |
298 | { | |
299 | struct nicvf_rss_info *rss = &nic->rss_info; | |
300 | u64 key_addr = NIC_VNIC_RSS_KEY_0_4; | |
301 | int idx; | |
302 | ||
303 | for (idx = 0; idx < RSS_HASH_KEY_SIZE; idx++) { | |
304 | nicvf_reg_write(nic, key_addr, rss->key[idx]); | |
305 | key_addr += sizeof(u64); | |
306 | } | |
307 | } | |
308 | ||
309 | static int nicvf_rss_init(struct nicvf *nic) | |
310 | { | |
311 | struct nicvf_rss_info *rss = &nic->rss_info; | |
312 | int idx; | |
313 | ||
314 | nicvf_get_rss_size(nic); | |
315 | ||
38bb5d4f | 316 | if (cpi_alg != CPI_ALG_NONE) { |
4863dea3 SG |
317 | rss->enable = false; |
318 | rss->hash_bits = 0; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | rss->enable = true; | |
323 | ||
324 | /* Using the HW reset value for now */ | |
4a4f87d8 AM |
325 | rss->key[0] = 0xFEED0BADFEED0BADULL; |
326 | rss->key[1] = 0xFEED0BADFEED0BADULL; | |
327 | rss->key[2] = 0xFEED0BADFEED0BADULL; | |
328 | rss->key[3] = 0xFEED0BADFEED0BADULL; | |
329 | rss->key[4] = 0xFEED0BADFEED0BADULL; | |
4863dea3 SG |
330 | |
331 | nicvf_set_rss_key(nic); | |
332 | ||
333 | rss->cfg = RSS_IP_HASH_ENA | RSS_TCP_HASH_ENA | RSS_UDP_HASH_ENA; | |
334 | nicvf_reg_write(nic, NIC_VNIC_RSS_CFG, rss->cfg); | |
335 | ||
336 | rss->hash_bits = ilog2(rounddown_pow_of_two(rss->rss_size)); | |
337 | ||
338 | for (idx = 0; idx < rss->rss_size; idx++) | |
339 | rss->ind_tbl[idx] = ethtool_rxfh_indir_default(idx, | |
340 | nic->qs->rq_cnt); | |
341 | nicvf_config_rss(nic); | |
342 | return 1; | |
343 | } | |
344 | ||
345 | int nicvf_set_real_num_queues(struct net_device *netdev, | |
346 | int tx_queues, int rx_queues) | |
347 | { | |
348 | int err = 0; | |
349 | ||
350 | err = netif_set_real_num_tx_queues(netdev, tx_queues); | |
351 | if (err) { | |
352 | netdev_err(netdev, | |
353 | "Failed to set no of Tx queues: %d\n", tx_queues); | |
354 | return err; | |
355 | } | |
356 | ||
357 | err = netif_set_real_num_rx_queues(netdev, rx_queues); | |
358 | if (err) | |
359 | netdev_err(netdev, | |
360 | "Failed to set no of Rx queues: %d\n", rx_queues); | |
361 | return err; | |
362 | } | |
363 | ||
364 | static int nicvf_init_resources(struct nicvf *nic) | |
365 | { | |
366 | int err; | |
2cd2a196 AM |
367 | union nic_mbx mbx = {}; |
368 | ||
369 | mbx.msg.msg = NIC_MBOX_MSG_CFG_DONE; | |
4863dea3 SG |
370 | |
371 | /* Enable Qset */ | |
372 | nicvf_qset_config(nic, true); | |
373 | ||
374 | /* Initialize queues and HW for data transfer */ | |
375 | err = nicvf_config_data_transfer(nic, true); | |
376 | if (err) { | |
377 | netdev_err(nic->netdev, | |
378 | "Failed to alloc/config VF's QSet resources\n"); | |
379 | return err; | |
380 | } | |
381 | ||
382 | /* Send VF config done msg to PF */ | |
2cd2a196 | 383 | nicvf_write_to_mbx(nic, &mbx); |
4863dea3 SG |
384 | |
385 | return 0; | |
386 | } | |
387 | ||
388 | static void nicvf_snd_pkt_handler(struct net_device *netdev, | |
389 | struct cmp_queue *cq, | |
390 | struct cqe_send_t *cqe_tx, int cqe_type) | |
391 | { | |
392 | struct sk_buff *skb = NULL; | |
393 | struct nicvf *nic = netdev_priv(netdev); | |
394 | struct snd_queue *sq; | |
395 | struct sq_hdr_subdesc *hdr; | |
396 | ||
397 | sq = &nic->qs->sq[cqe_tx->sq_idx]; | |
398 | ||
399 | hdr = (struct sq_hdr_subdesc *)GET_SQ_DESC(sq, cqe_tx->sqe_ptr); | |
400 | if (hdr->subdesc_type != SQ_DESC_TYPE_HEADER) | |
401 | return; | |
402 | ||
403 | netdev_dbg(nic->netdev, | |
404 | "%s Qset #%d SQ #%d SQ ptr #%d subdesc count %d\n", | |
405 | __func__, cqe_tx->sq_qs, cqe_tx->sq_idx, | |
406 | cqe_tx->sqe_ptr, hdr->subdesc_cnt); | |
407 | ||
408 | nicvf_put_sq_desc(sq, hdr->subdesc_cnt + 1); | |
409 | nicvf_check_cqe_tx_errs(nic, cq, cqe_tx); | |
410 | skb = (struct sk_buff *)sq->skbuff[cqe_tx->sqe_ptr]; | |
411 | /* For TSO offloaded packets only one head SKB needs to be freed */ | |
412 | if (skb) { | |
413 | prefetch(skb); | |
414 | dev_consume_skb_any(skb); | |
143ceb0b | 415 | sq->skbuff[cqe_tx->sqe_ptr] = (u64)NULL; |
4863dea3 SG |
416 | } |
417 | } | |
418 | ||
38bb5d4f SG |
419 | static inline void nicvf_set_rxhash(struct net_device *netdev, |
420 | struct cqe_rx_t *cqe_rx, | |
421 | struct sk_buff *skb) | |
422 | { | |
423 | u8 hash_type; | |
424 | u32 hash; | |
425 | ||
426 | if (!(netdev->features & NETIF_F_RXHASH)) | |
427 | return; | |
428 | ||
429 | switch (cqe_rx->rss_alg) { | |
430 | case RSS_ALG_TCP_IP: | |
431 | case RSS_ALG_UDP_IP: | |
432 | hash_type = PKT_HASH_TYPE_L4; | |
433 | hash = cqe_rx->rss_tag; | |
434 | break; | |
435 | case RSS_ALG_IP: | |
436 | hash_type = PKT_HASH_TYPE_L3; | |
437 | hash = cqe_rx->rss_tag; | |
438 | break; | |
439 | default: | |
440 | hash_type = PKT_HASH_TYPE_NONE; | |
441 | hash = 0; | |
442 | } | |
443 | ||
444 | skb_set_hash(skb, hash, hash_type); | |
445 | } | |
446 | ||
4863dea3 SG |
447 | static void nicvf_rcv_pkt_handler(struct net_device *netdev, |
448 | struct napi_struct *napi, | |
449 | struct cmp_queue *cq, | |
450 | struct cqe_rx_t *cqe_rx, int cqe_type) | |
451 | { | |
452 | struct sk_buff *skb; | |
453 | struct nicvf *nic = netdev_priv(netdev); | |
454 | int err = 0; | |
455 | ||
456 | /* Check for errors */ | |
457 | err = nicvf_check_cqe_rx_errs(nic, cq, cqe_rx); | |
458 | if (err && !cqe_rx->rb_cnt) | |
459 | return; | |
460 | ||
461 | skb = nicvf_get_rcv_skb(nic, cqe_rx); | |
462 | if (!skb) { | |
463 | netdev_dbg(nic->netdev, "Packet not received\n"); | |
464 | return; | |
465 | } | |
466 | ||
467 | if (netif_msg_pktdata(nic)) { | |
468 | netdev_info(nic->netdev, "%s: skb 0x%p, len=%d\n", netdev->name, | |
469 | skb, skb->len); | |
470 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, | |
471 | skb->data, skb->len, true); | |
472 | } | |
473 | ||
a2dc5ded SG |
474 | /* If error packet, drop it here */ |
475 | if (err) { | |
476 | dev_kfree_skb_any(skb); | |
477 | return; | |
478 | } | |
479 | ||
4863dea3 SG |
480 | nicvf_set_rx_frame_cnt(nic, skb); |
481 | ||
38bb5d4f SG |
482 | nicvf_set_rxhash(netdev, cqe_rx, skb); |
483 | ||
4863dea3 SG |
484 | skb_record_rx_queue(skb, cqe_rx->rq_idx); |
485 | if (netdev->hw_features & NETIF_F_RXCSUM) { | |
486 | /* HW by default verifies TCP/UDP/SCTP checksums */ | |
487 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
488 | } else { | |
489 | skb_checksum_none_assert(skb); | |
490 | } | |
491 | ||
492 | skb->protocol = eth_type_trans(skb, netdev); | |
493 | ||
494 | if (napi && (netdev->features & NETIF_F_GRO)) | |
495 | napi_gro_receive(napi, skb); | |
496 | else | |
497 | netif_receive_skb(skb); | |
498 | } | |
499 | ||
500 | static int nicvf_cq_intr_handler(struct net_device *netdev, u8 cq_idx, | |
501 | struct napi_struct *napi, int budget) | |
502 | { | |
74840b83 | 503 | int processed_cqe, work_done = 0, tx_done = 0; |
4863dea3 SG |
504 | int cqe_count, cqe_head; |
505 | struct nicvf *nic = netdev_priv(netdev); | |
506 | struct queue_set *qs = nic->qs; | |
507 | struct cmp_queue *cq = &qs->cq[cq_idx]; | |
508 | struct cqe_rx_t *cq_desc; | |
74840b83 | 509 | struct netdev_queue *txq; |
4863dea3 SG |
510 | |
511 | spin_lock_bh(&cq->lock); | |
512 | loop: | |
513 | processed_cqe = 0; | |
514 | /* Get no of valid CQ entries to process */ | |
515 | cqe_count = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_STATUS, cq_idx); | |
516 | cqe_count &= CQ_CQE_COUNT; | |
517 | if (!cqe_count) | |
518 | goto done; | |
519 | ||
520 | /* Get head of the valid CQ entries */ | |
521 | cqe_head = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_HEAD, cq_idx) >> 9; | |
522 | cqe_head &= 0xFFFF; | |
523 | ||
74840b83 SG |
524 | netdev_dbg(nic->netdev, "%s CQ%d cqe_count %d cqe_head %d\n", |
525 | __func__, cq_idx, cqe_count, cqe_head); | |
4863dea3 SG |
526 | while (processed_cqe < cqe_count) { |
527 | /* Get the CQ descriptor */ | |
528 | cq_desc = (struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head); | |
529 | cqe_head++; | |
530 | cqe_head &= (cq->dmem.q_len - 1); | |
531 | /* Initiate prefetch for next descriptor */ | |
532 | prefetch((struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head)); | |
533 | ||
534 | if ((work_done >= budget) && napi && | |
535 | (cq_desc->cqe_type != CQE_TYPE_SEND)) { | |
536 | break; | |
537 | } | |
538 | ||
74840b83 SG |
539 | netdev_dbg(nic->netdev, "CQ%d cq_desc->cqe_type %d\n", |
540 | cq_idx, cq_desc->cqe_type); | |
4863dea3 SG |
541 | switch (cq_desc->cqe_type) { |
542 | case CQE_TYPE_RX: | |
543 | nicvf_rcv_pkt_handler(netdev, napi, cq, | |
544 | cq_desc, CQE_TYPE_RX); | |
545 | work_done++; | |
546 | break; | |
547 | case CQE_TYPE_SEND: | |
548 | nicvf_snd_pkt_handler(netdev, cq, | |
549 | (void *)cq_desc, CQE_TYPE_SEND); | |
74840b83 | 550 | tx_done++; |
4863dea3 SG |
551 | break; |
552 | case CQE_TYPE_INVALID: | |
553 | case CQE_TYPE_RX_SPLIT: | |
554 | case CQE_TYPE_RX_TCP: | |
555 | case CQE_TYPE_SEND_PTP: | |
556 | /* Ignore for now */ | |
557 | break; | |
558 | } | |
559 | processed_cqe++; | |
560 | } | |
74840b83 SG |
561 | netdev_dbg(nic->netdev, |
562 | "%s CQ%d processed_cqe %d work_done %d budget %d\n", | |
563 | __func__, cq_idx, processed_cqe, work_done, budget); | |
4863dea3 SG |
564 | |
565 | /* Ring doorbell to inform H/W to reuse processed CQEs */ | |
566 | nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_DOOR, | |
567 | cq_idx, processed_cqe); | |
568 | ||
569 | if ((work_done < budget) && napi) | |
570 | goto loop; | |
571 | ||
572 | done: | |
74840b83 SG |
573 | /* Wakeup TXQ if its stopped earlier due to SQ full */ |
574 | if (tx_done) { | |
575 | txq = netdev_get_tx_queue(netdev, cq_idx); | |
576 | if (netif_tx_queue_stopped(txq)) { | |
b49087dd | 577 | netif_tx_start_queue(txq); |
74840b83 SG |
578 | nic->drv_stats.txq_wake++; |
579 | if (netif_msg_tx_err(nic)) | |
580 | netdev_warn(netdev, | |
581 | "%s: Transmit queue wakeup SQ%d\n", | |
582 | netdev->name, cq_idx); | |
583 | } | |
584 | } | |
585 | ||
4863dea3 SG |
586 | spin_unlock_bh(&cq->lock); |
587 | return work_done; | |
588 | } | |
589 | ||
590 | static int nicvf_poll(struct napi_struct *napi, int budget) | |
591 | { | |
592 | u64 cq_head; | |
593 | int work_done = 0; | |
594 | struct net_device *netdev = napi->dev; | |
595 | struct nicvf *nic = netdev_priv(netdev); | |
596 | struct nicvf_cq_poll *cq; | |
4863dea3 SG |
597 | |
598 | cq = container_of(napi, struct nicvf_cq_poll, napi); | |
599 | work_done = nicvf_cq_intr_handler(netdev, cq->cq_idx, napi, budget); | |
600 | ||
4863dea3 SG |
601 | if (work_done < budget) { |
602 | /* Slow packet rate, exit polling */ | |
603 | napi_complete(napi); | |
604 | /* Re-enable interrupts */ | |
605 | cq_head = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_HEAD, | |
606 | cq->cq_idx); | |
607 | nicvf_clear_intr(nic, NICVF_INTR_CQ, cq->cq_idx); | |
608 | nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_HEAD, | |
609 | cq->cq_idx, cq_head); | |
610 | nicvf_enable_intr(nic, NICVF_INTR_CQ, cq->cq_idx); | |
611 | } | |
612 | return work_done; | |
613 | } | |
614 | ||
615 | /* Qset error interrupt handler | |
616 | * | |
617 | * As of now only CQ errors are handled | |
618 | */ | |
fd7ec062 | 619 | static void nicvf_handle_qs_err(unsigned long data) |
4863dea3 SG |
620 | { |
621 | struct nicvf *nic = (struct nicvf *)data; | |
622 | struct queue_set *qs = nic->qs; | |
623 | int qidx; | |
624 | u64 status; | |
625 | ||
626 | netif_tx_disable(nic->netdev); | |
627 | ||
628 | /* Check if it is CQ err */ | |
629 | for (qidx = 0; qidx < qs->cq_cnt; qidx++) { | |
630 | status = nicvf_queue_reg_read(nic, NIC_QSET_CQ_0_7_STATUS, | |
631 | qidx); | |
632 | if (!(status & CQ_ERR_MASK)) | |
633 | continue; | |
634 | /* Process already queued CQEs and reconfig CQ */ | |
635 | nicvf_disable_intr(nic, NICVF_INTR_CQ, qidx); | |
636 | nicvf_sq_disable(nic, qidx); | |
637 | nicvf_cq_intr_handler(nic->netdev, qidx, NULL, 0); | |
638 | nicvf_cmp_queue_config(nic, qs, qidx, true); | |
639 | nicvf_sq_free_used_descs(nic->netdev, &qs->sq[qidx], qidx); | |
640 | nicvf_sq_enable(nic, &qs->sq[qidx], qidx); | |
641 | ||
642 | nicvf_enable_intr(nic, NICVF_INTR_CQ, qidx); | |
643 | } | |
644 | ||
645 | netif_tx_start_all_queues(nic->netdev); | |
646 | /* Re-enable Qset error interrupt */ | |
647 | nicvf_enable_intr(nic, NICVF_INTR_QS_ERR, 0); | |
648 | } | |
649 | ||
650 | static irqreturn_t nicvf_misc_intr_handler(int irq, void *nicvf_irq) | |
651 | { | |
652 | struct nicvf *nic = (struct nicvf *)nicvf_irq; | |
653 | u64 intr; | |
654 | ||
655 | intr = nicvf_reg_read(nic, NIC_VF_INT); | |
656 | /* Check for spurious interrupt */ | |
657 | if (!(intr & NICVF_INTR_MBOX_MASK)) | |
658 | return IRQ_HANDLED; | |
659 | ||
660 | nicvf_handle_mbx_intr(nic); | |
661 | ||
662 | return IRQ_HANDLED; | |
663 | } | |
664 | ||
665 | static irqreturn_t nicvf_intr_handler(int irq, void *nicvf_irq) | |
666 | { | |
667 | u64 qidx, intr, clear_intr = 0; | |
668 | u64 cq_intr, rbdr_intr, qs_err_intr; | |
669 | struct nicvf *nic = (struct nicvf *)nicvf_irq; | |
670 | struct queue_set *qs = nic->qs; | |
671 | struct nicvf_cq_poll *cq_poll = NULL; | |
672 | ||
673 | intr = nicvf_reg_read(nic, NIC_VF_INT); | |
674 | if (netif_msg_intr(nic)) | |
675 | netdev_info(nic->netdev, "%s: interrupt status 0x%llx\n", | |
676 | nic->netdev->name, intr); | |
677 | ||
678 | qs_err_intr = intr & NICVF_INTR_QS_ERR_MASK; | |
679 | if (qs_err_intr) { | |
680 | /* Disable Qset err interrupt and schedule softirq */ | |
681 | nicvf_disable_intr(nic, NICVF_INTR_QS_ERR, 0); | |
682 | tasklet_hi_schedule(&nic->qs_err_task); | |
683 | clear_intr |= qs_err_intr; | |
684 | } | |
685 | ||
686 | /* Disable interrupts and start polling */ | |
687 | cq_intr = (intr & NICVF_INTR_CQ_MASK) >> NICVF_INTR_CQ_SHIFT; | |
688 | for (qidx = 0; qidx < qs->cq_cnt; qidx++) { | |
689 | if (!(cq_intr & (1 << qidx))) | |
690 | continue; | |
691 | if (!nicvf_is_intr_enabled(nic, NICVF_INTR_CQ, qidx)) | |
692 | continue; | |
693 | ||
694 | nicvf_disable_intr(nic, NICVF_INTR_CQ, qidx); | |
695 | clear_intr |= ((1 << qidx) << NICVF_INTR_CQ_SHIFT); | |
696 | ||
697 | cq_poll = nic->napi[qidx]; | |
698 | /* Schedule NAPI */ | |
699 | if (cq_poll) | |
700 | napi_schedule(&cq_poll->napi); | |
701 | } | |
702 | ||
703 | /* Handle RBDR interrupts */ | |
704 | rbdr_intr = (intr & NICVF_INTR_RBDR_MASK) >> NICVF_INTR_RBDR_SHIFT; | |
705 | if (rbdr_intr) { | |
706 | /* Disable RBDR interrupt and schedule softirq */ | |
707 | for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) { | |
708 | if (!nicvf_is_intr_enabled(nic, NICVF_INTR_RBDR, qidx)) | |
709 | continue; | |
710 | nicvf_disable_intr(nic, NICVF_INTR_RBDR, qidx); | |
711 | tasklet_hi_schedule(&nic->rbdr_task); | |
712 | clear_intr |= ((1 << qidx) << NICVF_INTR_RBDR_SHIFT); | |
713 | } | |
714 | } | |
715 | ||
716 | /* Clear interrupts */ | |
717 | nicvf_reg_write(nic, NIC_VF_INT, clear_intr); | |
718 | return IRQ_HANDLED; | |
719 | } | |
720 | ||
721 | static int nicvf_enable_msix(struct nicvf *nic) | |
722 | { | |
723 | int ret, vec; | |
724 | ||
725 | nic->num_vec = NIC_VF_MSIX_VECTORS; | |
726 | ||
727 | for (vec = 0; vec < nic->num_vec; vec++) | |
728 | nic->msix_entries[vec].entry = vec; | |
729 | ||
730 | ret = pci_enable_msix(nic->pdev, nic->msix_entries, nic->num_vec); | |
731 | if (ret) { | |
732 | netdev_err(nic->netdev, | |
733 | "Req for #%d msix vectors failed\n", nic->num_vec); | |
734 | return 0; | |
735 | } | |
736 | nic->msix_enabled = 1; | |
737 | return 1; | |
738 | } | |
739 | ||
740 | static void nicvf_disable_msix(struct nicvf *nic) | |
741 | { | |
742 | if (nic->msix_enabled) { | |
743 | pci_disable_msix(nic->pdev); | |
744 | nic->msix_enabled = 0; | |
745 | nic->num_vec = 0; | |
746 | } | |
747 | } | |
748 | ||
749 | static int nicvf_register_interrupts(struct nicvf *nic) | |
750 | { | |
751 | int irq, free, ret = 0; | |
752 | int vector; | |
753 | ||
754 | for_each_cq_irq(irq) | |
755 | sprintf(nic->irq_name[irq], "NICVF%d CQ%d", | |
756 | nic->vf_id, irq); | |
757 | ||
758 | for_each_sq_irq(irq) | |
759 | sprintf(nic->irq_name[irq], "NICVF%d SQ%d", | |
760 | nic->vf_id, irq - NICVF_INTR_ID_SQ); | |
761 | ||
762 | for_each_rbdr_irq(irq) | |
763 | sprintf(nic->irq_name[irq], "NICVF%d RBDR%d", | |
764 | nic->vf_id, irq - NICVF_INTR_ID_RBDR); | |
765 | ||
766 | /* Register all interrupts except mailbox */ | |
767 | for (irq = 0; irq < NICVF_INTR_ID_SQ; irq++) { | |
768 | vector = nic->msix_entries[irq].vector; | |
769 | ret = request_irq(vector, nicvf_intr_handler, | |
770 | 0, nic->irq_name[irq], nic); | |
771 | if (ret) | |
772 | break; | |
773 | nic->irq_allocated[irq] = true; | |
774 | } | |
775 | ||
776 | for (irq = NICVF_INTR_ID_SQ; irq < NICVF_INTR_ID_MISC; irq++) { | |
777 | vector = nic->msix_entries[irq].vector; | |
778 | ret = request_irq(vector, nicvf_intr_handler, | |
779 | 0, nic->irq_name[irq], nic); | |
780 | if (ret) | |
781 | break; | |
782 | nic->irq_allocated[irq] = true; | |
783 | } | |
784 | ||
785 | sprintf(nic->irq_name[NICVF_INTR_ID_QS_ERR], | |
786 | "NICVF%d Qset error", nic->vf_id); | |
787 | if (!ret) { | |
788 | vector = nic->msix_entries[NICVF_INTR_ID_QS_ERR].vector; | |
789 | irq = NICVF_INTR_ID_QS_ERR; | |
790 | ret = request_irq(vector, nicvf_intr_handler, | |
791 | 0, nic->irq_name[irq], nic); | |
792 | if (!ret) | |
793 | nic->irq_allocated[irq] = true; | |
794 | } | |
795 | ||
796 | if (ret) { | |
797 | netdev_err(nic->netdev, "Request irq failed\n"); | |
798 | for (free = 0; free < irq; free++) | |
799 | free_irq(nic->msix_entries[free].vector, nic); | |
800 | return ret; | |
801 | } | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | static void nicvf_unregister_interrupts(struct nicvf *nic) | |
807 | { | |
808 | int irq; | |
809 | ||
810 | /* Free registered interrupts */ | |
811 | for (irq = 0; irq < nic->num_vec; irq++) { | |
812 | if (nic->irq_allocated[irq]) | |
813 | free_irq(nic->msix_entries[irq].vector, nic); | |
814 | nic->irq_allocated[irq] = false; | |
815 | } | |
816 | ||
817 | /* Disable MSI-X */ | |
818 | nicvf_disable_msix(nic); | |
819 | } | |
820 | ||
821 | /* Initialize MSIX vectors and register MISC interrupt. | |
822 | * Send READY message to PF to check if its alive | |
823 | */ | |
824 | static int nicvf_register_misc_interrupt(struct nicvf *nic) | |
825 | { | |
826 | int ret = 0; | |
827 | int irq = NICVF_INTR_ID_MISC; | |
828 | ||
829 | /* Return if mailbox interrupt is already registered */ | |
830 | if (nic->msix_enabled) | |
831 | return 0; | |
832 | ||
833 | /* Enable MSI-X */ | |
834 | if (!nicvf_enable_msix(nic)) | |
835 | return 1; | |
836 | ||
837 | sprintf(nic->irq_name[irq], "%s Mbox", "NICVF"); | |
838 | /* Register Misc interrupt */ | |
839 | ret = request_irq(nic->msix_entries[irq].vector, | |
840 | nicvf_misc_intr_handler, 0, nic->irq_name[irq], nic); | |
841 | ||
842 | if (ret) | |
843 | return ret; | |
844 | nic->irq_allocated[irq] = true; | |
845 | ||
846 | /* Enable mailbox interrupt */ | |
847 | nicvf_enable_intr(nic, NICVF_INTR_MBOX, 0); | |
848 | ||
849 | /* Check if VF is able to communicate with PF */ | |
850 | if (!nicvf_check_pf_ready(nic)) { | |
851 | nicvf_disable_intr(nic, NICVF_INTR_MBOX, 0); | |
852 | nicvf_unregister_interrupts(nic); | |
853 | return 1; | |
854 | } | |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
859 | static netdev_tx_t nicvf_xmit(struct sk_buff *skb, struct net_device *netdev) | |
860 | { | |
861 | struct nicvf *nic = netdev_priv(netdev); | |
862 | int qid = skb_get_queue_mapping(skb); | |
863 | struct netdev_queue *txq = netdev_get_tx_queue(netdev, qid); | |
864 | ||
865 | /* Check for minimum packet length */ | |
866 | if (skb->len <= ETH_HLEN) { | |
867 | dev_kfree_skb(skb); | |
868 | return NETDEV_TX_OK; | |
869 | } | |
870 | ||
b49087dd | 871 | if (!netif_tx_queue_stopped(txq) && !nicvf_sq_append_skb(nic, skb)) { |
4863dea3 | 872 | netif_tx_stop_queue(txq); |
74840b83 | 873 | nic->drv_stats.txq_stop++; |
4863dea3 SG |
874 | if (netif_msg_tx_err(nic)) |
875 | netdev_warn(netdev, | |
876 | "%s: Transmit ring full, stopping SQ%d\n", | |
877 | netdev->name, qid); | |
878 | ||
879 | return NETDEV_TX_BUSY; | |
880 | } | |
881 | ||
882 | return NETDEV_TX_OK; | |
883 | } | |
884 | ||
885 | int nicvf_stop(struct net_device *netdev) | |
886 | { | |
887 | int irq, qidx; | |
888 | struct nicvf *nic = netdev_priv(netdev); | |
889 | struct queue_set *qs = nic->qs; | |
890 | struct nicvf_cq_poll *cq_poll = NULL; | |
891 | union nic_mbx mbx = {}; | |
892 | ||
893 | mbx.msg.msg = NIC_MBOX_MSG_SHUTDOWN; | |
894 | nicvf_send_msg_to_pf(nic, &mbx); | |
895 | ||
896 | netif_carrier_off(netdev); | |
4863dea3 SG |
897 | |
898 | /* Disable RBDR & QS error interrupts */ | |
899 | for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) { | |
900 | nicvf_disable_intr(nic, NICVF_INTR_RBDR, qidx); | |
901 | nicvf_clear_intr(nic, NICVF_INTR_RBDR, qidx); | |
902 | } | |
903 | nicvf_disable_intr(nic, NICVF_INTR_QS_ERR, 0); | |
904 | nicvf_clear_intr(nic, NICVF_INTR_QS_ERR, 0); | |
905 | ||
906 | /* Wait for pending IRQ handlers to finish */ | |
907 | for (irq = 0; irq < nic->num_vec; irq++) | |
908 | synchronize_irq(nic->msix_entries[irq].vector); | |
909 | ||
910 | tasklet_kill(&nic->rbdr_task); | |
911 | tasklet_kill(&nic->qs_err_task); | |
912 | if (nic->rb_work_scheduled) | |
913 | cancel_delayed_work_sync(&nic->rbdr_work); | |
914 | ||
915 | for (qidx = 0; qidx < nic->qs->cq_cnt; qidx++) { | |
916 | cq_poll = nic->napi[qidx]; | |
917 | if (!cq_poll) | |
918 | continue; | |
919 | nic->napi[qidx] = NULL; | |
920 | napi_synchronize(&cq_poll->napi); | |
921 | /* CQ intr is enabled while napi_complete, | |
922 | * so disable it now | |
923 | */ | |
924 | nicvf_disable_intr(nic, NICVF_INTR_CQ, qidx); | |
925 | nicvf_clear_intr(nic, NICVF_INTR_CQ, qidx); | |
926 | napi_disable(&cq_poll->napi); | |
927 | netif_napi_del(&cq_poll->napi); | |
928 | kfree(cq_poll); | |
929 | } | |
930 | ||
b49087dd SG |
931 | netif_tx_disable(netdev); |
932 | ||
4863dea3 SG |
933 | /* Free resources */ |
934 | nicvf_config_data_transfer(nic, false); | |
935 | ||
936 | /* Disable HW Qset */ | |
937 | nicvf_qset_config(nic, false); | |
938 | ||
939 | /* disable mailbox interrupt */ | |
940 | nicvf_disable_intr(nic, NICVF_INTR_MBOX, 0); | |
941 | ||
942 | nicvf_unregister_interrupts(nic); | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | int nicvf_open(struct net_device *netdev) | |
948 | { | |
949 | int err, qidx; | |
950 | struct nicvf *nic = netdev_priv(netdev); | |
951 | struct queue_set *qs = nic->qs; | |
952 | struct nicvf_cq_poll *cq_poll = NULL; | |
953 | ||
954 | nic->mtu = netdev->mtu; | |
955 | ||
956 | netif_carrier_off(netdev); | |
957 | ||
958 | err = nicvf_register_misc_interrupt(nic); | |
959 | if (err) | |
960 | return err; | |
961 | ||
962 | /* Register NAPI handler for processing CQEs */ | |
963 | for (qidx = 0; qidx < qs->cq_cnt; qidx++) { | |
964 | cq_poll = kzalloc(sizeof(*cq_poll), GFP_KERNEL); | |
965 | if (!cq_poll) { | |
966 | err = -ENOMEM; | |
967 | goto napi_del; | |
968 | } | |
969 | cq_poll->cq_idx = qidx; | |
970 | netif_napi_add(netdev, &cq_poll->napi, nicvf_poll, | |
971 | NAPI_POLL_WEIGHT); | |
972 | napi_enable(&cq_poll->napi); | |
973 | nic->napi[qidx] = cq_poll; | |
974 | } | |
975 | ||
976 | /* Check if we got MAC address from PF or else generate a radom MAC */ | |
977 | if (is_zero_ether_addr(netdev->dev_addr)) { | |
978 | eth_hw_addr_random(netdev); | |
979 | nicvf_hw_set_mac_addr(nic, netdev); | |
980 | } | |
981 | ||
bd049a90 PF |
982 | if (nic->set_mac_pending) { |
983 | nic->set_mac_pending = false; | |
984 | nicvf_hw_set_mac_addr(nic, netdev); | |
985 | } | |
986 | ||
4863dea3 SG |
987 | /* Init tasklet for handling Qset err interrupt */ |
988 | tasklet_init(&nic->qs_err_task, nicvf_handle_qs_err, | |
989 | (unsigned long)nic); | |
990 | ||
991 | /* Init RBDR tasklet which will refill RBDR */ | |
992 | tasklet_init(&nic->rbdr_task, nicvf_rbdr_task, | |
993 | (unsigned long)nic); | |
994 | INIT_DELAYED_WORK(&nic->rbdr_work, nicvf_rbdr_work); | |
995 | ||
996 | /* Configure CPI alorithm */ | |
997 | nic->cpi_alg = cpi_alg; | |
998 | nicvf_config_cpi(nic); | |
999 | ||
1000 | /* Configure receive side scaling */ | |
1001 | nicvf_rss_init(nic); | |
1002 | ||
1003 | err = nicvf_register_interrupts(nic); | |
1004 | if (err) | |
1005 | goto cleanup; | |
1006 | ||
1007 | /* Initialize the queues */ | |
1008 | err = nicvf_init_resources(nic); | |
1009 | if (err) | |
1010 | goto cleanup; | |
1011 | ||
1012 | /* Make sure queue initialization is written */ | |
1013 | wmb(); | |
1014 | ||
1015 | nicvf_reg_write(nic, NIC_VF_INT, -1); | |
1016 | /* Enable Qset err interrupt */ | |
1017 | nicvf_enable_intr(nic, NICVF_INTR_QS_ERR, 0); | |
1018 | ||
1019 | /* Enable completion queue interrupt */ | |
1020 | for (qidx = 0; qidx < qs->cq_cnt; qidx++) | |
1021 | nicvf_enable_intr(nic, NICVF_INTR_CQ, qidx); | |
1022 | ||
1023 | /* Enable RBDR threshold interrupt */ | |
1024 | for (qidx = 0; qidx < qs->rbdr_cnt; qidx++) | |
1025 | nicvf_enable_intr(nic, NICVF_INTR_RBDR, qidx); | |
1026 | ||
74840b83 SG |
1027 | nic->drv_stats.txq_stop = 0; |
1028 | nic->drv_stats.txq_wake = 0; | |
1029 | ||
4863dea3 SG |
1030 | netif_carrier_on(netdev); |
1031 | netif_tx_start_all_queues(netdev); | |
1032 | ||
1033 | return 0; | |
1034 | cleanup: | |
1035 | nicvf_disable_intr(nic, NICVF_INTR_MBOX, 0); | |
1036 | nicvf_unregister_interrupts(nic); | |
1037 | napi_del: | |
1038 | for (qidx = 0; qidx < qs->cq_cnt; qidx++) { | |
1039 | cq_poll = nic->napi[qidx]; | |
1040 | if (!cq_poll) | |
1041 | continue; | |
1042 | napi_disable(&cq_poll->napi); | |
1043 | netif_napi_del(&cq_poll->napi); | |
1044 | kfree(cq_poll); | |
1045 | nic->napi[qidx] = NULL; | |
1046 | } | |
1047 | return err; | |
1048 | } | |
1049 | ||
1050 | static int nicvf_update_hw_max_frs(struct nicvf *nic, int mtu) | |
1051 | { | |
1052 | union nic_mbx mbx = {}; | |
1053 | ||
1054 | mbx.frs.msg = NIC_MBOX_MSG_SET_MAX_FRS; | |
1055 | mbx.frs.max_frs = mtu; | |
1056 | mbx.frs.vf_id = nic->vf_id; | |
1057 | ||
1058 | return nicvf_send_msg_to_pf(nic, &mbx); | |
1059 | } | |
1060 | ||
1061 | static int nicvf_change_mtu(struct net_device *netdev, int new_mtu) | |
1062 | { | |
1063 | struct nicvf *nic = netdev_priv(netdev); | |
1064 | ||
1065 | if (new_mtu > NIC_HW_MAX_FRS) | |
1066 | return -EINVAL; | |
1067 | ||
1068 | if (new_mtu < NIC_HW_MIN_FRS) | |
1069 | return -EINVAL; | |
1070 | ||
1071 | if (nicvf_update_hw_max_frs(nic, new_mtu)) | |
1072 | return -EINVAL; | |
1073 | netdev->mtu = new_mtu; | |
1074 | nic->mtu = new_mtu; | |
1075 | ||
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | static int nicvf_set_mac_address(struct net_device *netdev, void *p) | |
1080 | { | |
1081 | struct sockaddr *addr = p; | |
1082 | struct nicvf *nic = netdev_priv(netdev); | |
1083 | ||
1084 | if (!is_valid_ether_addr(addr->sa_data)) | |
1085 | return -EADDRNOTAVAIL; | |
1086 | ||
1087 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
1088 | ||
bd049a90 | 1089 | if (nic->msix_enabled) { |
4863dea3 SG |
1090 | if (nicvf_hw_set_mac_addr(nic, netdev)) |
1091 | return -EBUSY; | |
bd049a90 PF |
1092 | } else { |
1093 | nic->set_mac_pending = true; | |
1094 | } | |
4863dea3 SG |
1095 | |
1096 | return 0; | |
1097 | } | |
1098 | ||
4863dea3 SG |
1099 | void nicvf_update_lmac_stats(struct nicvf *nic) |
1100 | { | |
1101 | int stat = 0; | |
1102 | union nic_mbx mbx = {}; | |
4863dea3 SG |
1103 | |
1104 | if (!netif_running(nic->netdev)) | |
1105 | return; | |
1106 | ||
1107 | mbx.bgx_stats.msg = NIC_MBOX_MSG_BGX_STATS; | |
1108 | mbx.bgx_stats.vf_id = nic->vf_id; | |
1109 | /* Rx stats */ | |
1110 | mbx.bgx_stats.rx = 1; | |
1111 | while (stat < BGX_RX_STATS_COUNT) { | |
4863dea3 | 1112 | mbx.bgx_stats.idx = stat; |
6051cba7 SG |
1113 | if (nicvf_send_msg_to_pf(nic, &mbx)) |
1114 | return; | |
4863dea3 SG |
1115 | stat++; |
1116 | } | |
1117 | ||
1118 | stat = 0; | |
1119 | ||
1120 | /* Tx stats */ | |
1121 | mbx.bgx_stats.rx = 0; | |
1122 | while (stat < BGX_TX_STATS_COUNT) { | |
4863dea3 | 1123 | mbx.bgx_stats.idx = stat; |
6051cba7 SG |
1124 | if (nicvf_send_msg_to_pf(nic, &mbx)) |
1125 | return; | |
4863dea3 SG |
1126 | stat++; |
1127 | } | |
1128 | } | |
1129 | ||
1130 | void nicvf_update_stats(struct nicvf *nic) | |
1131 | { | |
1132 | int qidx; | |
a2dc5ded | 1133 | struct nicvf_hw_stats *stats = &nic->hw_stats; |
4863dea3 SG |
1134 | struct nicvf_drv_stats *drv_stats = &nic->drv_stats; |
1135 | struct queue_set *qs = nic->qs; | |
1136 | ||
1137 | #define GET_RX_STATS(reg) \ | |
1138 | nicvf_reg_read(nic, NIC_VNIC_RX_STAT_0_13 | (reg << 3)) | |
1139 | #define GET_TX_STATS(reg) \ | |
1140 | nicvf_reg_read(nic, NIC_VNIC_TX_STAT_0_4 | (reg << 3)) | |
1141 | ||
a2dc5ded SG |
1142 | stats->rx_bytes = GET_RX_STATS(RX_OCTS); |
1143 | stats->rx_ucast_frames = GET_RX_STATS(RX_UCAST); | |
1144 | stats->rx_bcast_frames = GET_RX_STATS(RX_BCAST); | |
1145 | stats->rx_mcast_frames = GET_RX_STATS(RX_MCAST); | |
4863dea3 SG |
1146 | stats->rx_fcs_errors = GET_RX_STATS(RX_FCS); |
1147 | stats->rx_l2_errors = GET_RX_STATS(RX_L2ERR); | |
1148 | stats->rx_drop_red = GET_RX_STATS(RX_RED); | |
a2dc5ded | 1149 | stats->rx_drop_red_bytes = GET_RX_STATS(RX_RED_OCTS); |
4863dea3 | 1150 | stats->rx_drop_overrun = GET_RX_STATS(RX_ORUN); |
a2dc5ded | 1151 | stats->rx_drop_overrun_bytes = GET_RX_STATS(RX_ORUN_OCTS); |
4863dea3 SG |
1152 | stats->rx_drop_bcast = GET_RX_STATS(RX_DRP_BCAST); |
1153 | stats->rx_drop_mcast = GET_RX_STATS(RX_DRP_MCAST); | |
1154 | stats->rx_drop_l3_bcast = GET_RX_STATS(RX_DRP_L3BCAST); | |
1155 | stats->rx_drop_l3_mcast = GET_RX_STATS(RX_DRP_L3MCAST); | |
1156 | ||
1157 | stats->tx_bytes_ok = GET_TX_STATS(TX_OCTS); | |
1158 | stats->tx_ucast_frames_ok = GET_TX_STATS(TX_UCAST); | |
1159 | stats->tx_bcast_frames_ok = GET_TX_STATS(TX_BCAST); | |
1160 | stats->tx_mcast_frames_ok = GET_TX_STATS(TX_MCAST); | |
1161 | stats->tx_drops = GET_TX_STATS(TX_DROP); | |
1162 | ||
4863dea3 SG |
1163 | drv_stats->tx_frames_ok = stats->tx_ucast_frames_ok + |
1164 | stats->tx_bcast_frames_ok + | |
1165 | stats->tx_mcast_frames_ok; | |
1166 | drv_stats->rx_drops = stats->rx_drop_red + | |
1167 | stats->rx_drop_overrun; | |
1168 | drv_stats->tx_drops = stats->tx_drops; | |
1169 | ||
1170 | /* Update RQ and SQ stats */ | |
1171 | for (qidx = 0; qidx < qs->rq_cnt; qidx++) | |
1172 | nicvf_update_rq_stats(nic, qidx); | |
1173 | for (qidx = 0; qidx < qs->sq_cnt; qidx++) | |
1174 | nicvf_update_sq_stats(nic, qidx); | |
1175 | } | |
1176 | ||
fd7ec062 | 1177 | static struct rtnl_link_stats64 *nicvf_get_stats64(struct net_device *netdev, |
4863dea3 SG |
1178 | struct rtnl_link_stats64 *stats) |
1179 | { | |
1180 | struct nicvf *nic = netdev_priv(netdev); | |
a2dc5ded | 1181 | struct nicvf_hw_stats *hw_stats = &nic->hw_stats; |
4863dea3 SG |
1182 | struct nicvf_drv_stats *drv_stats = &nic->drv_stats; |
1183 | ||
1184 | nicvf_update_stats(nic); | |
1185 | ||
a2dc5ded | 1186 | stats->rx_bytes = hw_stats->rx_bytes; |
4863dea3 SG |
1187 | stats->rx_packets = drv_stats->rx_frames_ok; |
1188 | stats->rx_dropped = drv_stats->rx_drops; | |
a2dc5ded | 1189 | stats->multicast = hw_stats->rx_mcast_frames; |
4863dea3 SG |
1190 | |
1191 | stats->tx_bytes = hw_stats->tx_bytes_ok; | |
1192 | stats->tx_packets = drv_stats->tx_frames_ok; | |
1193 | stats->tx_dropped = drv_stats->tx_drops; | |
1194 | ||
1195 | return stats; | |
1196 | } | |
1197 | ||
1198 | static void nicvf_tx_timeout(struct net_device *dev) | |
1199 | { | |
1200 | struct nicvf *nic = netdev_priv(dev); | |
1201 | ||
1202 | if (netif_msg_tx_err(nic)) | |
1203 | netdev_warn(dev, "%s: Transmit timed out, resetting\n", | |
1204 | dev->name); | |
1205 | ||
1206 | schedule_work(&nic->reset_task); | |
1207 | } | |
1208 | ||
1209 | static void nicvf_reset_task(struct work_struct *work) | |
1210 | { | |
1211 | struct nicvf *nic; | |
1212 | ||
1213 | nic = container_of(work, struct nicvf, reset_task); | |
1214 | ||
1215 | if (!netif_running(nic->netdev)) | |
1216 | return; | |
1217 | ||
1218 | nicvf_stop(nic->netdev); | |
1219 | nicvf_open(nic->netdev); | |
1220 | nic->netdev->trans_start = jiffies; | |
1221 | } | |
1222 | ||
1223 | static const struct net_device_ops nicvf_netdev_ops = { | |
1224 | .ndo_open = nicvf_open, | |
1225 | .ndo_stop = nicvf_stop, | |
1226 | .ndo_start_xmit = nicvf_xmit, | |
1227 | .ndo_change_mtu = nicvf_change_mtu, | |
1228 | .ndo_set_mac_address = nicvf_set_mac_address, | |
1229 | .ndo_get_stats64 = nicvf_get_stats64, | |
1230 | .ndo_tx_timeout = nicvf_tx_timeout, | |
1231 | }; | |
1232 | ||
1233 | static int nicvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
1234 | { | |
1235 | struct device *dev = &pdev->dev; | |
1236 | struct net_device *netdev; | |
1237 | struct nicvf *nic; | |
1238 | struct queue_set *qs; | |
1239 | int err; | |
1240 | ||
1241 | err = pci_enable_device(pdev); | |
1242 | if (err) { | |
1243 | dev_err(dev, "Failed to enable PCI device\n"); | |
1244 | return err; | |
1245 | } | |
1246 | ||
1247 | err = pci_request_regions(pdev, DRV_NAME); | |
1248 | if (err) { | |
1249 | dev_err(dev, "PCI request regions failed 0x%x\n", err); | |
1250 | goto err_disable_device; | |
1251 | } | |
1252 | ||
1253 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(48)); | |
1254 | if (err) { | |
1255 | dev_err(dev, "Unable to get usable DMA configuration\n"); | |
1256 | goto err_release_regions; | |
1257 | } | |
1258 | ||
1259 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(48)); | |
1260 | if (err) { | |
1261 | dev_err(dev, "unable to get 48-bit DMA for consistent allocations\n"); | |
1262 | goto err_release_regions; | |
1263 | } | |
1264 | ||
1265 | netdev = alloc_etherdev_mqs(sizeof(struct nicvf), | |
1266 | MAX_RCV_QUEUES_PER_QS, | |
1267 | MAX_SND_QUEUES_PER_QS); | |
1268 | if (!netdev) { | |
1269 | err = -ENOMEM; | |
1270 | goto err_release_regions; | |
1271 | } | |
1272 | ||
1273 | pci_set_drvdata(pdev, netdev); | |
1274 | ||
1275 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
1276 | ||
1277 | nic = netdev_priv(netdev); | |
1278 | nic->netdev = netdev; | |
1279 | nic->pdev = pdev; | |
1280 | ||
1281 | /* MAP VF's configuration registers */ | |
1282 | nic->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); | |
1283 | if (!nic->reg_base) { | |
1284 | dev_err(dev, "Cannot map config register space, aborting\n"); | |
1285 | err = -ENOMEM; | |
1286 | goto err_free_netdev; | |
1287 | } | |
1288 | ||
1289 | err = nicvf_set_qset_resources(nic); | |
1290 | if (err) | |
1291 | goto err_free_netdev; | |
1292 | ||
1293 | qs = nic->qs; | |
1294 | ||
1295 | err = nicvf_set_real_num_queues(netdev, qs->sq_cnt, qs->rq_cnt); | |
1296 | if (err) | |
1297 | goto err_free_netdev; | |
1298 | ||
1299 | /* Check if PF is alive and get MAC address for this VF */ | |
1300 | err = nicvf_register_misc_interrupt(nic); | |
1301 | if (err) | |
1302 | goto err_free_netdev; | |
1303 | ||
1304 | netdev->features |= (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_SG | | |
38bb5d4f SG |
1305 | NETIF_F_TSO | NETIF_F_GRO | NETIF_F_RXHASH); |
1306 | ||
4863dea3 SG |
1307 | netdev->hw_features = netdev->features; |
1308 | ||
1309 | netdev->netdev_ops = &nicvf_netdev_ops; | |
3d7a8aaa | 1310 | netdev->watchdog_timeo = NICVF_TX_TIMEOUT; |
4863dea3 SG |
1311 | |
1312 | INIT_WORK(&nic->reset_task, nicvf_reset_task); | |
1313 | ||
1314 | err = register_netdev(netdev); | |
1315 | if (err) { | |
1316 | dev_err(dev, "Failed to register netdevice\n"); | |
1317 | goto err_unregister_interrupts; | |
1318 | } | |
1319 | ||
1320 | nic->msg_enable = debug; | |
1321 | ||
1322 | nicvf_set_ethtool_ops(netdev); | |
1323 | ||
1324 | return 0; | |
1325 | ||
1326 | err_unregister_interrupts: | |
1327 | nicvf_unregister_interrupts(nic); | |
1328 | err_free_netdev: | |
1329 | pci_set_drvdata(pdev, NULL); | |
1330 | free_netdev(netdev); | |
1331 | err_release_regions: | |
1332 | pci_release_regions(pdev); | |
1333 | err_disable_device: | |
1334 | pci_disable_device(pdev); | |
1335 | return err; | |
1336 | } | |
1337 | ||
1338 | static void nicvf_remove(struct pci_dev *pdev) | |
1339 | { | |
1340 | struct net_device *netdev = pci_get_drvdata(pdev); | |
1341 | struct nicvf *nic = netdev_priv(netdev); | |
1342 | ||
1343 | unregister_netdev(netdev); | |
1344 | nicvf_unregister_interrupts(nic); | |
1345 | pci_set_drvdata(pdev, NULL); | |
1346 | free_netdev(netdev); | |
1347 | pci_release_regions(pdev); | |
1348 | pci_disable_device(pdev); | |
1349 | } | |
1350 | ||
4adf4351 SG |
1351 | static void nicvf_shutdown(struct pci_dev *pdev) |
1352 | { | |
1353 | nicvf_remove(pdev); | |
1354 | } | |
1355 | ||
4863dea3 SG |
1356 | static struct pci_driver nicvf_driver = { |
1357 | .name = DRV_NAME, | |
1358 | .id_table = nicvf_id_table, | |
1359 | .probe = nicvf_probe, | |
1360 | .remove = nicvf_remove, | |
4adf4351 | 1361 | .shutdown = nicvf_shutdown, |
4863dea3 SG |
1362 | }; |
1363 | ||
1364 | static int __init nicvf_init_module(void) | |
1365 | { | |
1366 | pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION); | |
1367 | ||
1368 | return pci_register_driver(&nicvf_driver); | |
1369 | } | |
1370 | ||
1371 | static void __exit nicvf_cleanup_module(void) | |
1372 | { | |
1373 | pci_unregister_driver(&nicvf_driver); | |
1374 | } | |
1375 | ||
1376 | module_init(nicvf_init_module); | |
1377 | module_exit(nicvf_cleanup_module); |