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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[deliverable/linux.git] / drivers / net / octeon / octeon_mgmt.c
1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2009 Cavium Networks
7 */
8
9 #include <linux/capability.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/init.h>
12 #include <linux/platform_device.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <linux/if_vlan.h>
16 #include <linux/phy.h>
17 #include <linux/spinlock.h>
18
19 #include <asm/octeon/octeon.h>
20 #include <asm/octeon/cvmx-mixx-defs.h>
21 #include <asm/octeon/cvmx-agl-defs.h>
22
23 #define DRV_NAME "octeon_mgmt"
24 #define DRV_VERSION "2.0"
25 #define DRV_DESCRIPTION \
26 "Cavium Networks Octeon MII (management) port Network Driver"
27
28 #define OCTEON_MGMT_NAPI_WEIGHT 16
29
30 /*
31 * Ring sizes that are powers of two allow for more efficient modulo
32 * opertions.
33 */
34 #define OCTEON_MGMT_RX_RING_SIZE 512
35 #define OCTEON_MGMT_TX_RING_SIZE 128
36
37 /* Allow 8 bytes for vlan and FCS. */
38 #define OCTEON_MGMT_RX_HEADROOM (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN)
39
40 union mgmt_port_ring_entry {
41 u64 d64;
42 struct {
43 u64 reserved_62_63:2;
44 /* Length of the buffer/packet in bytes */
45 u64 len:14;
46 /* For TX, signals that the packet should be timestamped */
47 u64 tstamp:1;
48 /* The RX error code */
49 u64 code:7;
50 #define RING_ENTRY_CODE_DONE 0xf
51 #define RING_ENTRY_CODE_MORE 0x10
52 /* Physical address of the buffer */
53 u64 addr:40;
54 } s;
55 };
56
57 struct octeon_mgmt {
58 struct net_device *netdev;
59 int port;
60 int irq;
61 u64 *tx_ring;
62 dma_addr_t tx_ring_handle;
63 unsigned int tx_next;
64 unsigned int tx_next_clean;
65 unsigned int tx_current_fill;
66 /* The tx_list lock also protects the ring related variables */
67 struct sk_buff_head tx_list;
68
69 /* RX variables only touched in napi_poll. No locking necessary. */
70 u64 *rx_ring;
71 dma_addr_t rx_ring_handle;
72 unsigned int rx_next;
73 unsigned int rx_next_fill;
74 unsigned int rx_current_fill;
75 struct sk_buff_head rx_list;
76
77 spinlock_t lock;
78 unsigned int last_duplex;
79 unsigned int last_link;
80 struct device *dev;
81 struct napi_struct napi;
82 struct tasklet_struct tx_clean_tasklet;
83 struct phy_device *phydev;
84 };
85
86 static void octeon_mgmt_set_rx_irq(struct octeon_mgmt *p, int enable)
87 {
88 int port = p->port;
89 union cvmx_mixx_intena mix_intena;
90 unsigned long flags;
91
92 spin_lock_irqsave(&p->lock, flags);
93 mix_intena.u64 = cvmx_read_csr(CVMX_MIXX_INTENA(port));
94 mix_intena.s.ithena = enable ? 1 : 0;
95 cvmx_write_csr(CVMX_MIXX_INTENA(port), mix_intena.u64);
96 spin_unlock_irqrestore(&p->lock, flags);
97 }
98
99 static void octeon_mgmt_set_tx_irq(struct octeon_mgmt *p, int enable)
100 {
101 int port = p->port;
102 union cvmx_mixx_intena mix_intena;
103 unsigned long flags;
104
105 spin_lock_irqsave(&p->lock, flags);
106 mix_intena.u64 = cvmx_read_csr(CVMX_MIXX_INTENA(port));
107 mix_intena.s.othena = enable ? 1 : 0;
108 cvmx_write_csr(CVMX_MIXX_INTENA(port), mix_intena.u64);
109 spin_unlock_irqrestore(&p->lock, flags);
110 }
111
112 static inline void octeon_mgmt_enable_rx_irq(struct octeon_mgmt *p)
113 {
114 octeon_mgmt_set_rx_irq(p, 1);
115 }
116
117 static inline void octeon_mgmt_disable_rx_irq(struct octeon_mgmt *p)
118 {
119 octeon_mgmt_set_rx_irq(p, 0);
120 }
121
122 static inline void octeon_mgmt_enable_tx_irq(struct octeon_mgmt *p)
123 {
124 octeon_mgmt_set_tx_irq(p, 1);
125 }
126
127 static inline void octeon_mgmt_disable_tx_irq(struct octeon_mgmt *p)
128 {
129 octeon_mgmt_set_tx_irq(p, 0);
130 }
131
132 static unsigned int ring_max_fill(unsigned int ring_size)
133 {
134 return ring_size - 8;
135 }
136
137 static unsigned int ring_size_to_bytes(unsigned int ring_size)
138 {
139 return ring_size * sizeof(union mgmt_port_ring_entry);
140 }
141
142 static void octeon_mgmt_rx_fill_ring(struct net_device *netdev)
143 {
144 struct octeon_mgmt *p = netdev_priv(netdev);
145 int port = p->port;
146
147 while (p->rx_current_fill < ring_max_fill(OCTEON_MGMT_RX_RING_SIZE)) {
148 unsigned int size;
149 union mgmt_port_ring_entry re;
150 struct sk_buff *skb;
151
152 /* CN56XX pass 1 needs 8 bytes of padding. */
153 size = netdev->mtu + OCTEON_MGMT_RX_HEADROOM + 8 + NET_IP_ALIGN;
154
155 skb = netdev_alloc_skb(netdev, size);
156 if (!skb)
157 break;
158 skb_reserve(skb, NET_IP_ALIGN);
159 __skb_queue_tail(&p->rx_list, skb);
160
161 re.d64 = 0;
162 re.s.len = size;
163 re.s.addr = dma_map_single(p->dev, skb->data,
164 size,
165 DMA_FROM_DEVICE);
166
167 /* Put it in the ring. */
168 p->rx_ring[p->rx_next_fill] = re.d64;
169 dma_sync_single_for_device(p->dev, p->rx_ring_handle,
170 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
171 DMA_BIDIRECTIONAL);
172 p->rx_next_fill =
173 (p->rx_next_fill + 1) % OCTEON_MGMT_RX_RING_SIZE;
174 p->rx_current_fill++;
175 /* Ring the bell. */
176 cvmx_write_csr(CVMX_MIXX_IRING2(port), 1);
177 }
178 }
179
180 static void octeon_mgmt_clean_tx_buffers(struct octeon_mgmt *p)
181 {
182 int port = p->port;
183 union cvmx_mixx_orcnt mix_orcnt;
184 union mgmt_port_ring_entry re;
185 struct sk_buff *skb;
186 int cleaned = 0;
187 unsigned long flags;
188
189 mix_orcnt.u64 = cvmx_read_csr(CVMX_MIXX_ORCNT(port));
190 while (mix_orcnt.s.orcnt) {
191 dma_sync_single_for_cpu(p->dev, p->tx_ring_handle,
192 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
193 DMA_BIDIRECTIONAL);
194
195 spin_lock_irqsave(&p->tx_list.lock, flags);
196
197 re.d64 = p->tx_ring[p->tx_next_clean];
198 p->tx_next_clean =
199 (p->tx_next_clean + 1) % OCTEON_MGMT_TX_RING_SIZE;
200 skb = __skb_dequeue(&p->tx_list);
201
202 mix_orcnt.u64 = 0;
203 mix_orcnt.s.orcnt = 1;
204
205 /* Acknowledge to hardware that we have the buffer. */
206 cvmx_write_csr(CVMX_MIXX_ORCNT(port), mix_orcnt.u64);
207 p->tx_current_fill--;
208
209 spin_unlock_irqrestore(&p->tx_list.lock, flags);
210
211 dma_unmap_single(p->dev, re.s.addr, re.s.len,
212 DMA_TO_DEVICE);
213 dev_kfree_skb_any(skb);
214 cleaned++;
215
216 mix_orcnt.u64 = cvmx_read_csr(CVMX_MIXX_ORCNT(port));
217 }
218
219 if (cleaned && netif_queue_stopped(p->netdev))
220 netif_wake_queue(p->netdev);
221 }
222
223 static void octeon_mgmt_clean_tx_tasklet(unsigned long arg)
224 {
225 struct octeon_mgmt *p = (struct octeon_mgmt *)arg;
226 octeon_mgmt_clean_tx_buffers(p);
227 octeon_mgmt_enable_tx_irq(p);
228 }
229
230 static void octeon_mgmt_update_rx_stats(struct net_device *netdev)
231 {
232 struct octeon_mgmt *p = netdev_priv(netdev);
233 int port = p->port;
234 unsigned long flags;
235 u64 drop, bad;
236
237 /* These reads also clear the count registers. */
238 drop = cvmx_read_csr(CVMX_AGL_GMX_RXX_STATS_PKTS_DRP(port));
239 bad = cvmx_read_csr(CVMX_AGL_GMX_RXX_STATS_PKTS_BAD(port));
240
241 if (drop || bad) {
242 /* Do an atomic update. */
243 spin_lock_irqsave(&p->lock, flags);
244 netdev->stats.rx_errors += bad;
245 netdev->stats.rx_dropped += drop;
246 spin_unlock_irqrestore(&p->lock, flags);
247 }
248 }
249
250 static void octeon_mgmt_update_tx_stats(struct net_device *netdev)
251 {
252 struct octeon_mgmt *p = netdev_priv(netdev);
253 int port = p->port;
254 unsigned long flags;
255
256 union cvmx_agl_gmx_txx_stat0 s0;
257 union cvmx_agl_gmx_txx_stat1 s1;
258
259 /* These reads also clear the count registers. */
260 s0.u64 = cvmx_read_csr(CVMX_AGL_GMX_TXX_STAT0(port));
261 s1.u64 = cvmx_read_csr(CVMX_AGL_GMX_TXX_STAT1(port));
262
263 if (s0.s.xsdef || s0.s.xscol || s1.s.scol || s1.s.mcol) {
264 /* Do an atomic update. */
265 spin_lock_irqsave(&p->lock, flags);
266 netdev->stats.tx_errors += s0.s.xsdef + s0.s.xscol;
267 netdev->stats.collisions += s1.s.scol + s1.s.mcol;
268 spin_unlock_irqrestore(&p->lock, flags);
269 }
270 }
271
272 /*
273 * Dequeue a receive skb and its corresponding ring entry. The ring
274 * entry is returned, *pskb is updated to point to the skb.
275 */
276 static u64 octeon_mgmt_dequeue_rx_buffer(struct octeon_mgmt *p,
277 struct sk_buff **pskb)
278 {
279 union mgmt_port_ring_entry re;
280
281 dma_sync_single_for_cpu(p->dev, p->rx_ring_handle,
282 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
283 DMA_BIDIRECTIONAL);
284
285 re.d64 = p->rx_ring[p->rx_next];
286 p->rx_next = (p->rx_next + 1) % OCTEON_MGMT_RX_RING_SIZE;
287 p->rx_current_fill--;
288 *pskb = __skb_dequeue(&p->rx_list);
289
290 dma_unmap_single(p->dev, re.s.addr,
291 ETH_FRAME_LEN + OCTEON_MGMT_RX_HEADROOM,
292 DMA_FROM_DEVICE);
293
294 return re.d64;
295 }
296
297
298 static int octeon_mgmt_receive_one(struct octeon_mgmt *p)
299 {
300 int port = p->port;
301 struct net_device *netdev = p->netdev;
302 union cvmx_mixx_ircnt mix_ircnt;
303 union mgmt_port_ring_entry re;
304 struct sk_buff *skb;
305 struct sk_buff *skb2;
306 struct sk_buff *skb_new;
307 union mgmt_port_ring_entry re2;
308 int rc = 1;
309
310
311 re.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb);
312 if (likely(re.s.code == RING_ENTRY_CODE_DONE)) {
313 /* A good packet, send it up. */
314 skb_put(skb, re.s.len);
315 good:
316 skb->protocol = eth_type_trans(skb, netdev);
317 netdev->stats.rx_packets++;
318 netdev->stats.rx_bytes += skb->len;
319 netdev->last_rx = jiffies;
320 netif_receive_skb(skb);
321 rc = 0;
322 } else if (re.s.code == RING_ENTRY_CODE_MORE) {
323 /*
324 * Packet split across skbs. This can happen if we
325 * increase the MTU. Buffers that are already in the
326 * rx ring can then end up being too small. As the rx
327 * ring is refilled, buffers sized for the new MTU
328 * will be used and we should go back to the normal
329 * non-split case.
330 */
331 skb_put(skb, re.s.len);
332 do {
333 re2.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb2);
334 if (re2.s.code != RING_ENTRY_CODE_MORE
335 && re2.s.code != RING_ENTRY_CODE_DONE)
336 goto split_error;
337 skb_put(skb2, re2.s.len);
338 skb_new = skb_copy_expand(skb, 0, skb2->len,
339 GFP_ATOMIC);
340 if (!skb_new)
341 goto split_error;
342 if (skb_copy_bits(skb2, 0, skb_tail_pointer(skb_new),
343 skb2->len))
344 goto split_error;
345 skb_put(skb_new, skb2->len);
346 dev_kfree_skb_any(skb);
347 dev_kfree_skb_any(skb2);
348 skb = skb_new;
349 } while (re2.s.code == RING_ENTRY_CODE_MORE);
350 goto good;
351 } else {
352 /* Some other error, discard it. */
353 dev_kfree_skb_any(skb);
354 /*
355 * Error statistics are accumulated in
356 * octeon_mgmt_update_rx_stats.
357 */
358 }
359 goto done;
360 split_error:
361 /* Discard the whole mess. */
362 dev_kfree_skb_any(skb);
363 dev_kfree_skb_any(skb2);
364 while (re2.s.code == RING_ENTRY_CODE_MORE) {
365 re2.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb2);
366 dev_kfree_skb_any(skb2);
367 }
368 netdev->stats.rx_errors++;
369
370 done:
371 /* Tell the hardware we processed a packet. */
372 mix_ircnt.u64 = 0;
373 mix_ircnt.s.ircnt = 1;
374 cvmx_write_csr(CVMX_MIXX_IRCNT(port), mix_ircnt.u64);
375 return rc;
376
377 }
378
379 static int octeon_mgmt_receive_packets(struct octeon_mgmt *p, int budget)
380 {
381 int port = p->port;
382 unsigned int work_done = 0;
383 union cvmx_mixx_ircnt mix_ircnt;
384 int rc;
385
386
387 mix_ircnt.u64 = cvmx_read_csr(CVMX_MIXX_IRCNT(port));
388 while (work_done < budget && mix_ircnt.s.ircnt) {
389
390 rc = octeon_mgmt_receive_one(p);
391 if (!rc)
392 work_done++;
393
394 /* Check for more packets. */
395 mix_ircnt.u64 = cvmx_read_csr(CVMX_MIXX_IRCNT(port));
396 }
397
398 octeon_mgmt_rx_fill_ring(p->netdev);
399
400 return work_done;
401 }
402
403 static int octeon_mgmt_napi_poll(struct napi_struct *napi, int budget)
404 {
405 struct octeon_mgmt *p = container_of(napi, struct octeon_mgmt, napi);
406 struct net_device *netdev = p->netdev;
407 unsigned int work_done = 0;
408
409 work_done = octeon_mgmt_receive_packets(p, budget);
410
411 if (work_done < budget) {
412 /* We stopped because no more packets were available. */
413 napi_complete(napi);
414 octeon_mgmt_enable_rx_irq(p);
415 }
416 octeon_mgmt_update_rx_stats(netdev);
417
418 return work_done;
419 }
420
421 /* Reset the hardware to clean state. */
422 static void octeon_mgmt_reset_hw(struct octeon_mgmt *p)
423 {
424 union cvmx_mixx_ctl mix_ctl;
425 union cvmx_mixx_bist mix_bist;
426 union cvmx_agl_gmx_bist agl_gmx_bist;
427
428 mix_ctl.u64 = 0;
429 cvmx_write_csr(CVMX_MIXX_CTL(p->port), mix_ctl.u64);
430 do {
431 mix_ctl.u64 = cvmx_read_csr(CVMX_MIXX_CTL(p->port));
432 } while (mix_ctl.s.busy);
433 mix_ctl.s.reset = 1;
434 cvmx_write_csr(CVMX_MIXX_CTL(p->port), mix_ctl.u64);
435 cvmx_read_csr(CVMX_MIXX_CTL(p->port));
436 cvmx_wait(64);
437
438 mix_bist.u64 = cvmx_read_csr(CVMX_MIXX_BIST(p->port));
439 if (mix_bist.u64)
440 dev_warn(p->dev, "MIX failed BIST (0x%016llx)\n",
441 (unsigned long long)mix_bist.u64);
442
443 agl_gmx_bist.u64 = cvmx_read_csr(CVMX_AGL_GMX_BIST);
444 if (agl_gmx_bist.u64)
445 dev_warn(p->dev, "AGL failed BIST (0x%016llx)\n",
446 (unsigned long long)agl_gmx_bist.u64);
447 }
448
449 struct octeon_mgmt_cam_state {
450 u64 cam[6];
451 u64 cam_mask;
452 int cam_index;
453 };
454
455 static void octeon_mgmt_cam_state_add(struct octeon_mgmt_cam_state *cs,
456 unsigned char *addr)
457 {
458 int i;
459
460 for (i = 0; i < 6; i++)
461 cs->cam[i] |= (u64)addr[i] << (8 * (cs->cam_index));
462 cs->cam_mask |= (1ULL << cs->cam_index);
463 cs->cam_index++;
464 }
465
466 static void octeon_mgmt_set_rx_filtering(struct net_device *netdev)
467 {
468 struct octeon_mgmt *p = netdev_priv(netdev);
469 int port = p->port;
470 int i;
471 union cvmx_agl_gmx_rxx_adr_ctl adr_ctl;
472 union cvmx_agl_gmx_prtx_cfg agl_gmx_prtx;
473 unsigned long flags;
474 unsigned int prev_packet_enable;
475 unsigned int cam_mode = 1; /* 1 - Accept on CAM match */
476 unsigned int multicast_mode = 1; /* 1 - Reject all multicast. */
477 struct octeon_mgmt_cam_state cam_state;
478 struct dev_addr_list *list;
479 struct list_head *pos;
480 int available_cam_entries;
481
482 memset(&cam_state, 0, sizeof(cam_state));
483
484 if ((netdev->flags & IFF_PROMISC) || netdev->dev_addrs.count > 7) {
485 cam_mode = 0;
486 available_cam_entries = 8;
487 } else {
488 /*
489 * One CAM entry for the primary address, leaves seven
490 * for the secondary addresses.
491 */
492 available_cam_entries = 7 - netdev->dev_addrs.count;
493 }
494
495 if (netdev->flags & IFF_MULTICAST) {
496 if (cam_mode == 0 || (netdev->flags & IFF_ALLMULTI)
497 || netdev->mc_count > available_cam_entries)
498 multicast_mode = 2; /* 1 - Accept all multicast. */
499 else
500 multicast_mode = 0; /* 0 - Use CAM. */
501 }
502
503 if (cam_mode == 1) {
504 /* Add primary address. */
505 octeon_mgmt_cam_state_add(&cam_state, netdev->dev_addr);
506 list_for_each(pos, &netdev->dev_addrs.list) {
507 struct netdev_hw_addr *hw_addr;
508 hw_addr = list_entry(pos, struct netdev_hw_addr, list);
509 octeon_mgmt_cam_state_add(&cam_state, hw_addr->addr);
510 list = list->next;
511 }
512 }
513 if (multicast_mode == 0) {
514 i = netdev->mc_count;
515 list = netdev->mc_list;
516 while (i--) {
517 octeon_mgmt_cam_state_add(&cam_state, list->da_addr);
518 list = list->next;
519 }
520 }
521
522
523 spin_lock_irqsave(&p->lock, flags);
524
525 /* Disable packet I/O. */
526 agl_gmx_prtx.u64 = cvmx_read_csr(CVMX_AGL_GMX_PRTX_CFG(port));
527 prev_packet_enable = agl_gmx_prtx.s.en;
528 agl_gmx_prtx.s.en = 0;
529 cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port), agl_gmx_prtx.u64);
530
531
532 adr_ctl.u64 = 0;
533 adr_ctl.s.cam_mode = cam_mode;
534 adr_ctl.s.mcst = multicast_mode;
535 adr_ctl.s.bcst = 1; /* Allow broadcast */
536
537 cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CTL(port), adr_ctl.u64);
538
539 cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM0(port), cam_state.cam[0]);
540 cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM1(port), cam_state.cam[1]);
541 cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM2(port), cam_state.cam[2]);
542 cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM3(port), cam_state.cam[3]);
543 cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM4(port), cam_state.cam[4]);
544 cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM5(port), cam_state.cam[5]);
545 cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM_EN(port), cam_state.cam_mask);
546
547 /* Restore packet I/O. */
548 agl_gmx_prtx.s.en = prev_packet_enable;
549 cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port), agl_gmx_prtx.u64);
550
551 spin_unlock_irqrestore(&p->lock, flags);
552 }
553
554 static int octeon_mgmt_set_mac_address(struct net_device *netdev, void *addr)
555 {
556 struct sockaddr *sa = addr;
557
558 if (!is_valid_ether_addr(sa->sa_data))
559 return -EADDRNOTAVAIL;
560
561 memcpy(netdev->dev_addr, sa->sa_data, ETH_ALEN);
562
563 octeon_mgmt_set_rx_filtering(netdev);
564
565 return 0;
566 }
567
568 static int octeon_mgmt_change_mtu(struct net_device *netdev, int new_mtu)
569 {
570 struct octeon_mgmt *p = netdev_priv(netdev);
571 int port = p->port;
572 int size_without_fcs = new_mtu + OCTEON_MGMT_RX_HEADROOM;
573
574 /*
575 * Limit the MTU to make sure the ethernet packets are between
576 * 64 bytes and 16383 bytes.
577 */
578 if (size_without_fcs < 64 || size_without_fcs > 16383) {
579 dev_warn(p->dev, "MTU must be between %d and %d.\n",
580 64 - OCTEON_MGMT_RX_HEADROOM,
581 16383 - OCTEON_MGMT_RX_HEADROOM);
582 return -EINVAL;
583 }
584
585 netdev->mtu = new_mtu;
586
587 cvmx_write_csr(CVMX_AGL_GMX_RXX_FRM_MAX(port), size_without_fcs);
588 cvmx_write_csr(CVMX_AGL_GMX_RXX_JABBER(port),
589 (size_without_fcs + 7) & 0xfff8);
590
591 return 0;
592 }
593
594 static irqreturn_t octeon_mgmt_interrupt(int cpl, void *dev_id)
595 {
596 struct net_device *netdev = dev_id;
597 struct octeon_mgmt *p = netdev_priv(netdev);
598 int port = p->port;
599 union cvmx_mixx_isr mixx_isr;
600
601 mixx_isr.u64 = cvmx_read_csr(CVMX_MIXX_ISR(port));
602
603 /* Clear any pending interrupts */
604 cvmx_write_csr(CVMX_MIXX_ISR(port),
605 cvmx_read_csr(CVMX_MIXX_ISR(port)));
606 cvmx_read_csr(CVMX_MIXX_ISR(port));
607
608 if (mixx_isr.s.irthresh) {
609 octeon_mgmt_disable_rx_irq(p);
610 napi_schedule(&p->napi);
611 }
612 if (mixx_isr.s.orthresh) {
613 octeon_mgmt_disable_tx_irq(p);
614 tasklet_schedule(&p->tx_clean_tasklet);
615 }
616
617 return IRQ_HANDLED;
618 }
619
620 static int octeon_mgmt_ioctl(struct net_device *netdev,
621 struct ifreq *rq, int cmd)
622 {
623 struct octeon_mgmt *p = netdev_priv(netdev);
624
625 if (!netif_running(netdev))
626 return -EINVAL;
627
628 if (!p->phydev)
629 return -EINVAL;
630
631 return phy_mii_ioctl(p->phydev, if_mii(rq), cmd);
632 }
633
634 static void octeon_mgmt_adjust_link(struct net_device *netdev)
635 {
636 struct octeon_mgmt *p = netdev_priv(netdev);
637 int port = p->port;
638 union cvmx_agl_gmx_prtx_cfg prtx_cfg;
639 unsigned long flags;
640 int link_changed = 0;
641
642 spin_lock_irqsave(&p->lock, flags);
643 if (p->phydev->link) {
644 if (!p->last_link)
645 link_changed = 1;
646 if (p->last_duplex != p->phydev->duplex) {
647 p->last_duplex = p->phydev->duplex;
648 prtx_cfg.u64 =
649 cvmx_read_csr(CVMX_AGL_GMX_PRTX_CFG(port));
650 prtx_cfg.s.duplex = p->phydev->duplex;
651 cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port),
652 prtx_cfg.u64);
653 }
654 } else {
655 if (p->last_link)
656 link_changed = -1;
657 }
658 p->last_link = p->phydev->link;
659 spin_unlock_irqrestore(&p->lock, flags);
660
661 if (link_changed != 0) {
662 if (link_changed > 0) {
663 netif_carrier_on(netdev);
664 pr_info("%s: Link is up - %d/%s\n", netdev->name,
665 p->phydev->speed,
666 DUPLEX_FULL == p->phydev->duplex ?
667 "Full" : "Half");
668 } else {
669 netif_carrier_off(netdev);
670 pr_info("%s: Link is down\n", netdev->name);
671 }
672 }
673 }
674
675 static int octeon_mgmt_init_phy(struct net_device *netdev)
676 {
677 struct octeon_mgmt *p = netdev_priv(netdev);
678 char phy_id[20];
679
680 if (octeon_is_simulation()) {
681 /* No PHYs in the simulator. */
682 netif_carrier_on(netdev);
683 return 0;
684 }
685
686 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, "0", p->port);
687
688 p->phydev = phy_connect(netdev, phy_id, octeon_mgmt_adjust_link, 0,
689 PHY_INTERFACE_MODE_MII);
690
691 if (IS_ERR(p->phydev)) {
692 p->phydev = NULL;
693 return -1;
694 }
695
696 phy_start_aneg(p->phydev);
697
698 return 0;
699 }
700
701 static int octeon_mgmt_open(struct net_device *netdev)
702 {
703 struct octeon_mgmt *p = netdev_priv(netdev);
704 int port = p->port;
705 union cvmx_mixx_ctl mix_ctl;
706 union cvmx_agl_gmx_inf_mode agl_gmx_inf_mode;
707 union cvmx_mixx_oring1 oring1;
708 union cvmx_mixx_iring1 iring1;
709 union cvmx_agl_gmx_prtx_cfg prtx_cfg;
710 union cvmx_agl_gmx_rxx_frm_ctl rxx_frm_ctl;
711 union cvmx_mixx_irhwm mix_irhwm;
712 union cvmx_mixx_orhwm mix_orhwm;
713 union cvmx_mixx_intena mix_intena;
714 struct sockaddr sa;
715
716 /* Allocate ring buffers. */
717 p->tx_ring = kzalloc(ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
718 GFP_KERNEL);
719 if (!p->tx_ring)
720 return -ENOMEM;
721 p->tx_ring_handle =
722 dma_map_single(p->dev, p->tx_ring,
723 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
724 DMA_BIDIRECTIONAL);
725 p->tx_next = 0;
726 p->tx_next_clean = 0;
727 p->tx_current_fill = 0;
728
729
730 p->rx_ring = kzalloc(ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
731 GFP_KERNEL);
732 if (!p->rx_ring)
733 goto err_nomem;
734 p->rx_ring_handle =
735 dma_map_single(p->dev, p->rx_ring,
736 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
737 DMA_BIDIRECTIONAL);
738
739 p->rx_next = 0;
740 p->rx_next_fill = 0;
741 p->rx_current_fill = 0;
742
743 octeon_mgmt_reset_hw(p);
744
745 mix_ctl.u64 = cvmx_read_csr(CVMX_MIXX_CTL(port));
746
747 /* Bring it out of reset if needed. */
748 if (mix_ctl.s.reset) {
749 mix_ctl.s.reset = 0;
750 cvmx_write_csr(CVMX_MIXX_CTL(port), mix_ctl.u64);
751 do {
752 mix_ctl.u64 = cvmx_read_csr(CVMX_MIXX_CTL(port));
753 } while (mix_ctl.s.reset);
754 }
755
756 agl_gmx_inf_mode.u64 = 0;
757 agl_gmx_inf_mode.s.en = 1;
758 cvmx_write_csr(CVMX_AGL_GMX_INF_MODE, agl_gmx_inf_mode.u64);
759
760 oring1.u64 = 0;
761 oring1.s.obase = p->tx_ring_handle >> 3;
762 oring1.s.osize = OCTEON_MGMT_TX_RING_SIZE;
763 cvmx_write_csr(CVMX_MIXX_ORING1(port), oring1.u64);
764
765 iring1.u64 = 0;
766 iring1.s.ibase = p->rx_ring_handle >> 3;
767 iring1.s.isize = OCTEON_MGMT_RX_RING_SIZE;
768 cvmx_write_csr(CVMX_MIXX_IRING1(port), iring1.u64);
769
770 /* Disable packet I/O. */
771 prtx_cfg.u64 = cvmx_read_csr(CVMX_AGL_GMX_PRTX_CFG(port));
772 prtx_cfg.s.en = 0;
773 cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port), prtx_cfg.u64);
774
775 memcpy(sa.sa_data, netdev->dev_addr, ETH_ALEN);
776 octeon_mgmt_set_mac_address(netdev, &sa);
777
778 octeon_mgmt_change_mtu(netdev, netdev->mtu);
779
780 /*
781 * Enable the port HW. Packets are not allowed until
782 * cvmx_mgmt_port_enable() is called.
783 */
784 mix_ctl.u64 = 0;
785 mix_ctl.s.crc_strip = 1; /* Strip the ending CRC */
786 mix_ctl.s.en = 1; /* Enable the port */
787 mix_ctl.s.nbtarb = 0; /* Arbitration mode */
788 /* MII CB-request FIFO programmable high watermark */
789 mix_ctl.s.mrq_hwm = 1;
790 cvmx_write_csr(CVMX_MIXX_CTL(port), mix_ctl.u64);
791
792 if (OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)
793 || OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) {
794 /*
795 * Force compensation values, as they are not
796 * determined properly by HW
797 */
798 union cvmx_agl_gmx_drv_ctl drv_ctl;
799
800 drv_ctl.u64 = cvmx_read_csr(CVMX_AGL_GMX_DRV_CTL);
801 if (port) {
802 drv_ctl.s.byp_en1 = 1;
803 drv_ctl.s.nctl1 = 6;
804 drv_ctl.s.pctl1 = 6;
805 } else {
806 drv_ctl.s.byp_en = 1;
807 drv_ctl.s.nctl = 6;
808 drv_ctl.s.pctl = 6;
809 }
810 cvmx_write_csr(CVMX_AGL_GMX_DRV_CTL, drv_ctl.u64);
811 }
812
813 octeon_mgmt_rx_fill_ring(netdev);
814
815 /* Clear statistics. */
816 /* Clear on read. */
817 cvmx_write_csr(CVMX_AGL_GMX_RXX_STATS_CTL(port), 1);
818 cvmx_write_csr(CVMX_AGL_GMX_RXX_STATS_PKTS_DRP(port), 0);
819 cvmx_write_csr(CVMX_AGL_GMX_RXX_STATS_PKTS_BAD(port), 0);
820
821 cvmx_write_csr(CVMX_AGL_GMX_TXX_STATS_CTL(port), 1);
822 cvmx_write_csr(CVMX_AGL_GMX_TXX_STAT0(port), 0);
823 cvmx_write_csr(CVMX_AGL_GMX_TXX_STAT1(port), 0);
824
825 /* Clear any pending interrupts */
826 cvmx_write_csr(CVMX_MIXX_ISR(port), cvmx_read_csr(CVMX_MIXX_ISR(port)));
827
828 if (request_irq(p->irq, octeon_mgmt_interrupt, 0, netdev->name,
829 netdev)) {
830 dev_err(p->dev, "request_irq(%d) failed.\n", p->irq);
831 goto err_noirq;
832 }
833
834 /* Interrupt every single RX packet */
835 mix_irhwm.u64 = 0;
836 mix_irhwm.s.irhwm = 0;
837 cvmx_write_csr(CVMX_MIXX_IRHWM(port), mix_irhwm.u64);
838
839 /* Interrupt when we have 5 or more packets to clean. */
840 mix_orhwm.u64 = 0;
841 mix_orhwm.s.orhwm = 5;
842 cvmx_write_csr(CVMX_MIXX_ORHWM(port), mix_orhwm.u64);
843
844 /* Enable receive and transmit interrupts */
845 mix_intena.u64 = 0;
846 mix_intena.s.ithena = 1;
847 mix_intena.s.othena = 1;
848 cvmx_write_csr(CVMX_MIXX_INTENA(port), mix_intena.u64);
849
850
851 /* Enable packet I/O. */
852
853 rxx_frm_ctl.u64 = 0;
854 rxx_frm_ctl.s.pre_align = 1;
855 /*
856 * When set, disables the length check for non-min sized pkts
857 * with padding in the client data.
858 */
859 rxx_frm_ctl.s.pad_len = 1;
860 /* When set, disables the length check for VLAN pkts */
861 rxx_frm_ctl.s.vlan_len = 1;
862 /* When set, PREAMBLE checking is less strict */
863 rxx_frm_ctl.s.pre_free = 1;
864 /* Control Pause Frames can match station SMAC */
865 rxx_frm_ctl.s.ctl_smac = 0;
866 /* Control Pause Frames can match globally assign Multicast address */
867 rxx_frm_ctl.s.ctl_mcst = 1;
868 /* Forward pause information to TX block */
869 rxx_frm_ctl.s.ctl_bck = 1;
870 /* Drop Control Pause Frames */
871 rxx_frm_ctl.s.ctl_drp = 1;
872 /* Strip off the preamble */
873 rxx_frm_ctl.s.pre_strp = 1;
874 /*
875 * This port is configured to send PREAMBLE+SFD to begin every
876 * frame. GMX checks that the PREAMBLE is sent correctly.
877 */
878 rxx_frm_ctl.s.pre_chk = 1;
879 cvmx_write_csr(CVMX_AGL_GMX_RXX_FRM_CTL(port), rxx_frm_ctl.u64);
880
881 /* Enable the AGL block */
882 agl_gmx_inf_mode.u64 = 0;
883 agl_gmx_inf_mode.s.en = 1;
884 cvmx_write_csr(CVMX_AGL_GMX_INF_MODE, agl_gmx_inf_mode.u64);
885
886 /* Configure the port duplex and enables */
887 prtx_cfg.u64 = cvmx_read_csr(CVMX_AGL_GMX_PRTX_CFG(port));
888 prtx_cfg.s.tx_en = 1;
889 prtx_cfg.s.rx_en = 1;
890 prtx_cfg.s.en = 1;
891 p->last_duplex = 1;
892 prtx_cfg.s.duplex = p->last_duplex;
893 cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port), prtx_cfg.u64);
894
895 p->last_link = 0;
896 netif_carrier_off(netdev);
897
898 if (octeon_mgmt_init_phy(netdev)) {
899 dev_err(p->dev, "Cannot initialize PHY.\n");
900 goto err_noirq;
901 }
902
903 netif_wake_queue(netdev);
904 napi_enable(&p->napi);
905
906 return 0;
907 err_noirq:
908 octeon_mgmt_reset_hw(p);
909 dma_unmap_single(p->dev, p->rx_ring_handle,
910 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
911 DMA_BIDIRECTIONAL);
912 kfree(p->rx_ring);
913 err_nomem:
914 dma_unmap_single(p->dev, p->tx_ring_handle,
915 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
916 DMA_BIDIRECTIONAL);
917 kfree(p->tx_ring);
918 return -ENOMEM;
919 }
920
921 static int octeon_mgmt_stop(struct net_device *netdev)
922 {
923 struct octeon_mgmt *p = netdev_priv(netdev);
924
925 napi_disable(&p->napi);
926 netif_stop_queue(netdev);
927
928 if (p->phydev)
929 phy_disconnect(p->phydev);
930
931 netif_carrier_off(netdev);
932
933 octeon_mgmt_reset_hw(p);
934
935
936 free_irq(p->irq, netdev);
937
938 /* dma_unmap is a nop on Octeon, so just free everything. */
939 skb_queue_purge(&p->tx_list);
940 skb_queue_purge(&p->rx_list);
941
942 dma_unmap_single(p->dev, p->rx_ring_handle,
943 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
944 DMA_BIDIRECTIONAL);
945 kfree(p->rx_ring);
946
947 dma_unmap_single(p->dev, p->tx_ring_handle,
948 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
949 DMA_BIDIRECTIONAL);
950 kfree(p->tx_ring);
951
952
953 return 0;
954 }
955
956 static int octeon_mgmt_xmit(struct sk_buff *skb, struct net_device *netdev)
957 {
958 struct octeon_mgmt *p = netdev_priv(netdev);
959 int port = p->port;
960 union mgmt_port_ring_entry re;
961 unsigned long flags;
962
963 re.d64 = 0;
964 re.s.len = skb->len;
965 re.s.addr = dma_map_single(p->dev, skb->data,
966 skb->len,
967 DMA_TO_DEVICE);
968
969 spin_lock_irqsave(&p->tx_list.lock, flags);
970
971 if (unlikely(p->tx_current_fill >=
972 ring_max_fill(OCTEON_MGMT_TX_RING_SIZE))) {
973 spin_unlock_irqrestore(&p->tx_list.lock, flags);
974
975 dma_unmap_single(p->dev, re.s.addr, re.s.len,
976 DMA_TO_DEVICE);
977
978 netif_stop_queue(netdev);
979 return NETDEV_TX_BUSY;
980 }
981
982 __skb_queue_tail(&p->tx_list, skb);
983
984 /* Put it in the ring. */
985 p->tx_ring[p->tx_next] = re.d64;
986 p->tx_next = (p->tx_next + 1) % OCTEON_MGMT_TX_RING_SIZE;
987 p->tx_current_fill++;
988
989 spin_unlock_irqrestore(&p->tx_list.lock, flags);
990
991 dma_sync_single_for_device(p->dev, p->tx_ring_handle,
992 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
993 DMA_BIDIRECTIONAL);
994
995 netdev->stats.tx_packets++;
996 netdev->stats.tx_bytes += skb->len;
997
998 /* Ring the bell. */
999 cvmx_write_csr(CVMX_MIXX_ORING2(port), 1);
1000
1001 netdev->trans_start = jiffies;
1002 octeon_mgmt_clean_tx_buffers(p);
1003 octeon_mgmt_update_tx_stats(netdev);
1004 return NETDEV_TX_OK;
1005 }
1006
1007 #ifdef CONFIG_NET_POLL_CONTROLLER
1008 static void octeon_mgmt_poll_controller(struct net_device *netdev)
1009 {
1010 struct octeon_mgmt *p = netdev_priv(netdev);
1011
1012 octeon_mgmt_receive_packets(p, 16);
1013 octeon_mgmt_update_rx_stats(netdev);
1014 return;
1015 }
1016 #endif
1017
1018 static void octeon_mgmt_get_drvinfo(struct net_device *netdev,
1019 struct ethtool_drvinfo *info)
1020 {
1021 strncpy(info->driver, DRV_NAME, sizeof(info->driver));
1022 strncpy(info->version, DRV_VERSION, sizeof(info->version));
1023 strncpy(info->fw_version, "N/A", sizeof(info->fw_version));
1024 strncpy(info->bus_info, "N/A", sizeof(info->bus_info));
1025 info->n_stats = 0;
1026 info->testinfo_len = 0;
1027 info->regdump_len = 0;
1028 info->eedump_len = 0;
1029 }
1030
1031 static int octeon_mgmt_get_settings(struct net_device *netdev,
1032 struct ethtool_cmd *cmd)
1033 {
1034 struct octeon_mgmt *p = netdev_priv(netdev);
1035
1036 if (p->phydev)
1037 return phy_ethtool_gset(p->phydev, cmd);
1038
1039 return -EINVAL;
1040 }
1041
1042 static int octeon_mgmt_set_settings(struct net_device *netdev,
1043 struct ethtool_cmd *cmd)
1044 {
1045 struct octeon_mgmt *p = netdev_priv(netdev);
1046
1047 if (!capable(CAP_NET_ADMIN))
1048 return -EPERM;
1049
1050 if (p->phydev)
1051 return phy_ethtool_sset(p->phydev, cmd);
1052
1053 return -EINVAL;
1054 }
1055
1056 static const struct ethtool_ops octeon_mgmt_ethtool_ops = {
1057 .get_drvinfo = octeon_mgmt_get_drvinfo,
1058 .get_link = ethtool_op_get_link,
1059 .get_settings = octeon_mgmt_get_settings,
1060 .set_settings = octeon_mgmt_set_settings
1061 };
1062
1063 static const struct net_device_ops octeon_mgmt_ops = {
1064 .ndo_open = octeon_mgmt_open,
1065 .ndo_stop = octeon_mgmt_stop,
1066 .ndo_start_xmit = octeon_mgmt_xmit,
1067 .ndo_set_rx_mode = octeon_mgmt_set_rx_filtering,
1068 .ndo_set_multicast_list = octeon_mgmt_set_rx_filtering,
1069 .ndo_set_mac_address = octeon_mgmt_set_mac_address,
1070 .ndo_do_ioctl = octeon_mgmt_ioctl,
1071 .ndo_change_mtu = octeon_mgmt_change_mtu,
1072 #ifdef CONFIG_NET_POLL_CONTROLLER
1073 .ndo_poll_controller = octeon_mgmt_poll_controller,
1074 #endif
1075 };
1076
1077 static int __init octeon_mgmt_probe(struct platform_device *pdev)
1078 {
1079 struct resource *res_irq;
1080 struct net_device *netdev;
1081 struct octeon_mgmt *p;
1082 int i;
1083
1084 netdev = alloc_etherdev(sizeof(struct octeon_mgmt));
1085 if (netdev == NULL)
1086 return -ENOMEM;
1087
1088 dev_set_drvdata(&pdev->dev, netdev);
1089 p = netdev_priv(netdev);
1090 netif_napi_add(netdev, &p->napi, octeon_mgmt_napi_poll,
1091 OCTEON_MGMT_NAPI_WEIGHT);
1092
1093 p->netdev = netdev;
1094 p->dev = &pdev->dev;
1095
1096 p->port = pdev->id;
1097 snprintf(netdev->name, IFNAMSIZ, "mgmt%d", p->port);
1098
1099 res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1100 if (!res_irq)
1101 goto err;
1102
1103 p->irq = res_irq->start;
1104 spin_lock_init(&p->lock);
1105
1106 skb_queue_head_init(&p->tx_list);
1107 skb_queue_head_init(&p->rx_list);
1108 tasklet_init(&p->tx_clean_tasklet,
1109 octeon_mgmt_clean_tx_tasklet, (unsigned long)p);
1110
1111 netdev->netdev_ops = &octeon_mgmt_ops;
1112 netdev->ethtool_ops = &octeon_mgmt_ethtool_ops;
1113
1114
1115 /* The mgmt ports get the first N MACs. */
1116 for (i = 0; i < 6; i++)
1117 netdev->dev_addr[i] = octeon_bootinfo->mac_addr_base[i];
1118 netdev->dev_addr[5] += p->port;
1119
1120 if (p->port >= octeon_bootinfo->mac_addr_count)
1121 dev_err(&pdev->dev,
1122 "Error %s: Using MAC outside of the assigned range: "
1123 "%02x:%02x:%02x:%02x:%02x:%02x\n", netdev->name,
1124 netdev->dev_addr[0], netdev->dev_addr[1],
1125 netdev->dev_addr[2], netdev->dev_addr[3],
1126 netdev->dev_addr[4], netdev->dev_addr[5]);
1127
1128 if (register_netdev(netdev))
1129 goto err;
1130
1131 dev_info(&pdev->dev, "Version " DRV_VERSION "\n");
1132 return 0;
1133 err:
1134 free_netdev(netdev);
1135 return -ENOENT;
1136 }
1137
1138 static int __exit octeon_mgmt_remove(struct platform_device *pdev)
1139 {
1140 struct net_device *netdev = dev_get_drvdata(&pdev->dev);
1141
1142 unregister_netdev(netdev);
1143 free_netdev(netdev);
1144 return 0;
1145 }
1146
1147 static struct platform_driver octeon_mgmt_driver = {
1148 .driver = {
1149 .name = "octeon_mgmt",
1150 .owner = THIS_MODULE,
1151 },
1152 .probe = octeon_mgmt_probe,
1153 .remove = __exit_p(octeon_mgmt_remove),
1154 };
1155
1156 extern void octeon_mdiobus_force_mod_depencency(void);
1157
1158 static int __init octeon_mgmt_mod_init(void)
1159 {
1160 /* Force our mdiobus driver module to be loaded first. */
1161 octeon_mdiobus_force_mod_depencency();
1162 return platform_driver_register(&octeon_mgmt_driver);
1163 }
1164
1165 static void __exit octeon_mgmt_mod_exit(void)
1166 {
1167 platform_driver_unregister(&octeon_mgmt_driver);
1168 }
1169
1170 module_init(octeon_mgmt_mod_init);
1171 module_exit(octeon_mgmt_mod_exit);
1172
1173 MODULE_DESCRIPTION(DRV_DESCRIPTION);
1174 MODULE_AUTHOR("David Daney");
1175 MODULE_LICENSE("GPL");
1176 MODULE_VERSION(DRV_VERSION);
Linux kernel - Deliverables
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