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Merge branch 'for-3.11' of git://linux-nfs.org/~bfields/linux
[linux-2.6.git] / drivers / net / ethernet / octeon / octeon_mgmt.c
blob622aa75904c4ee07c1b666466925e08ce0df25d3
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) 2009-2012 Cavium, Inc
7 */
8
9 #include <linux/platform_device.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/etherdevice.h>
12 #include <linux/capability.h>
13 #include <linux/net_tstamp.h>
14 #include <linux/interrupt.h>
15 #include <linux/netdevice.h>
16 #include <linux/spinlock.h>
17 #include <linux/if_vlan.h>
18 #include <linux/of_mdio.h>
19 #include <linux/module.h>
20 #include <linux/of_net.h>
21 #include <linux/init.h>
22 #include <linux/slab.h>
23 #include <linux/phy.h>
24 #include <linux/io.h>
25
26 #include <asm/octeon/octeon.h>
27 #include <asm/octeon/cvmx-mixx-defs.h>
28 #include <asm/octeon/cvmx-agl-defs.h>
29
30 #define DRV_NAME "octeon_mgmt"
31 #define DRV_VERSION "2.0"
32 #define DRV_DESCRIPTION \
33 "Cavium Networks Octeon MII (management) port Network Driver"
34
35 #define OCTEON_MGMT_NAPI_WEIGHT 16
36
37 /* Ring sizes that are powers of two allow for more efficient modulo
38 * opertions.
39 */
40 #define OCTEON_MGMT_RX_RING_SIZE 512
41 #define OCTEON_MGMT_TX_RING_SIZE 128
42
43 /* Allow 8 bytes for vlan and FCS. */
44 #define OCTEON_MGMT_RX_HEADROOM (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN)
45
46 union mgmt_port_ring_entry {
47 u64 d64;
48 struct {
49 #define RING_ENTRY_CODE_DONE 0xf
50 #define RING_ENTRY_CODE_MORE 0x10
51 #ifdef __BIG_ENDIAN_BITFIELD
52 u64 reserved_62_63:2;
53 /* Length of the buffer/packet in bytes */
54 u64 len:14;
55 /* For TX, signals that the packet should be timestamped */
56 u64 tstamp:1;
57 /* The RX error code */
58 u64 code:7;
59 /* Physical address of the buffer */
60 u64 addr:40;
61 #else
62 u64 addr:40;
63 u64 code:7;
64 u64 tstamp:1;
65 u64 len:14;
66 u64 reserved_62_63:2;
67 #endif
68 } s;
69 };
70
71 #define MIX_ORING1 0x0
72 #define MIX_ORING2 0x8
73 #define MIX_IRING1 0x10
74 #define MIX_IRING2 0x18
75 #define MIX_CTL 0x20
76 #define MIX_IRHWM 0x28
77 #define MIX_IRCNT 0x30
78 #define MIX_ORHWM 0x38
79 #define MIX_ORCNT 0x40
80 #define MIX_ISR 0x48
81 #define MIX_INTENA 0x50
82 #define MIX_REMCNT 0x58
83 #define MIX_BIST 0x78
84
85 #define AGL_GMX_PRT_CFG 0x10
86 #define AGL_GMX_RX_FRM_CTL 0x18
87 #define AGL_GMX_RX_FRM_MAX 0x30
88 #define AGL_GMX_RX_JABBER 0x38
89 #define AGL_GMX_RX_STATS_CTL 0x50
90
91 #define AGL_GMX_RX_STATS_PKTS_DRP 0xb0
92 #define AGL_GMX_RX_STATS_OCTS_DRP 0xb8
93 #define AGL_GMX_RX_STATS_PKTS_BAD 0xc0
94
95 #define AGL_GMX_RX_ADR_CTL 0x100
96 #define AGL_GMX_RX_ADR_CAM_EN 0x108
97 #define AGL_GMX_RX_ADR_CAM0 0x180
98 #define AGL_GMX_RX_ADR_CAM1 0x188
99 #define AGL_GMX_RX_ADR_CAM2 0x190
100 #define AGL_GMX_RX_ADR_CAM3 0x198
101 #define AGL_GMX_RX_ADR_CAM4 0x1a0
102 #define AGL_GMX_RX_ADR_CAM5 0x1a8
103
104 #define AGL_GMX_TX_CLK 0x208
105 #define AGL_GMX_TX_STATS_CTL 0x268
106 #define AGL_GMX_TX_CTL 0x270
107 #define AGL_GMX_TX_STAT0 0x280
108 #define AGL_GMX_TX_STAT1 0x288
109 #define AGL_GMX_TX_STAT2 0x290
110 #define AGL_GMX_TX_STAT3 0x298
111 #define AGL_GMX_TX_STAT4 0x2a0
112 #define AGL_GMX_TX_STAT5 0x2a8
113 #define AGL_GMX_TX_STAT6 0x2b0
114 #define AGL_GMX_TX_STAT7 0x2b8
115 #define AGL_GMX_TX_STAT8 0x2c0
116 #define AGL_GMX_TX_STAT9 0x2c8
117
118 struct octeon_mgmt {
119 struct net_device *netdev;
120 u64 mix;
121 u64 agl;
122 u64 agl_prt_ctl;
123 int port;
124 int irq;
125 bool has_rx_tstamp;
126 u64 *tx_ring;
127 dma_addr_t tx_ring_handle;
128 unsigned int tx_next;
129 unsigned int tx_next_clean;
130 unsigned int tx_current_fill;
131 /* The tx_list lock also protects the ring related variables */
132 struct sk_buff_head tx_list;
133
134 /* RX variables only touched in napi_poll. No locking necessary. */
135 u64 *rx_ring;
136 dma_addr_t rx_ring_handle;
137 unsigned int rx_next;
138 unsigned int rx_next_fill;
139 unsigned int rx_current_fill;
140 struct sk_buff_head rx_list;
141
142 spinlock_t lock;
143 unsigned int last_duplex;
144 unsigned int last_link;
145 unsigned int last_speed;
146 struct device *dev;
147 struct napi_struct napi;
148 struct tasklet_struct tx_clean_tasklet;
149 struct phy_device *phydev;
150 struct device_node *phy_np;
151 resource_size_t mix_phys;
152 resource_size_t mix_size;
153 resource_size_t agl_phys;
154 resource_size_t agl_size;
155 resource_size_t agl_prt_ctl_phys;
156 resource_size_t agl_prt_ctl_size;
157 };
158
159 static void octeon_mgmt_set_rx_irq(struct octeon_mgmt *p, int enable)
160 {
161 union cvmx_mixx_intena mix_intena;
162 unsigned long flags;
163
164 spin_lock_irqsave(&p->lock, flags);
165 mix_intena.u64 = cvmx_read_csr(p->mix + MIX_INTENA);
166 mix_intena.s.ithena = enable ? 1 : 0;
167 cvmx_write_csr(p->mix + MIX_INTENA, mix_intena.u64);
168 spin_unlock_irqrestore(&p->lock, flags);
169 }
170
171 static void octeon_mgmt_set_tx_irq(struct octeon_mgmt *p, int enable)
172 {
173 union cvmx_mixx_intena mix_intena;
174 unsigned long flags;
175
176 spin_lock_irqsave(&p->lock, flags);
177 mix_intena.u64 = cvmx_read_csr(p->mix + MIX_INTENA);
178 mix_intena.s.othena = enable ? 1 : 0;
179 cvmx_write_csr(p->mix + MIX_INTENA, mix_intena.u64);
180 spin_unlock_irqrestore(&p->lock, flags);
181 }
182
183 static void octeon_mgmt_enable_rx_irq(struct octeon_mgmt *p)
184 {
185 octeon_mgmt_set_rx_irq(p, 1);
186 }
187
188 static void octeon_mgmt_disable_rx_irq(struct octeon_mgmt *p)
189 {
190 octeon_mgmt_set_rx_irq(p, 0);
191 }
192
193 static void octeon_mgmt_enable_tx_irq(struct octeon_mgmt *p)
194 {
195 octeon_mgmt_set_tx_irq(p, 1);
196 }
197
198 static void octeon_mgmt_disable_tx_irq(struct octeon_mgmt *p)
199 {
200 octeon_mgmt_set_tx_irq(p, 0);
201 }
202
203 static unsigned int ring_max_fill(unsigned int ring_size)
204 {
205 return ring_size - 8;
206 }
207
208 static unsigned int ring_size_to_bytes(unsigned int ring_size)
209 {
210 return ring_size * sizeof(union mgmt_port_ring_entry);
211 }
212
213 static void octeon_mgmt_rx_fill_ring(struct net_device *netdev)
214 {
215 struct octeon_mgmt *p = netdev_priv(netdev);
216
217 while (p->rx_current_fill < ring_max_fill(OCTEON_MGMT_RX_RING_SIZE)) {
218 unsigned int size;
219 union mgmt_port_ring_entry re;
220 struct sk_buff *skb;
221
222 /* CN56XX pass 1 needs 8 bytes of padding. */
223 size = netdev->mtu + OCTEON_MGMT_RX_HEADROOM + 8 + NET_IP_ALIGN;
224
225 skb = netdev_alloc_skb(netdev, size);
226 if (!skb)
227 break;
228 skb_reserve(skb, NET_IP_ALIGN);
229 __skb_queue_tail(&p->rx_list, skb);
230
231 re.d64 = 0;
232 re.s.len = size;
233 re.s.addr = dma_map_single(p->dev, skb->data,
234 size,
235 DMA_FROM_DEVICE);
236
237 /* Put it in the ring. */
238 p->rx_ring[p->rx_next_fill] = re.d64;
239 dma_sync_single_for_device(p->dev, p->rx_ring_handle,
240 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
241 DMA_BIDIRECTIONAL);
242 p->rx_next_fill =
243 (p->rx_next_fill + 1) % OCTEON_MGMT_RX_RING_SIZE;
244 p->rx_current_fill++;
245 /* Ring the bell. */
246 cvmx_write_csr(p->mix + MIX_IRING2, 1);
247 }
248 }
249
250 static ktime_t ptp_to_ktime(u64 ptptime)
251 {
252 ktime_t ktimebase;
253 u64 ptpbase;
254 unsigned long flags;
255
256 local_irq_save(flags);
257 /* Fill the icache with the code */
258 ktime_get_real();
259 /* Flush all pending operations */
260 mb();
261 /* Read the time and PTP clock as close together as
262 * possible. It is important that this sequence take the same
263 * amount of time to reduce jitter
264 */
265 ktimebase = ktime_get_real();
266 ptpbase = cvmx_read_csr(CVMX_MIO_PTP_CLOCK_HI);
267 local_irq_restore(flags);
268
269 return ktime_sub_ns(ktimebase, ptpbase - ptptime);
270 }
271
272 static void octeon_mgmt_clean_tx_buffers(struct octeon_mgmt *p)
273 {
274 union cvmx_mixx_orcnt mix_orcnt;
275 union mgmt_port_ring_entry re;
276 struct sk_buff *skb;
277 int cleaned = 0;
278 unsigned long flags;
279
280 mix_orcnt.u64 = cvmx_read_csr(p->mix + MIX_ORCNT);
281 while (mix_orcnt.s.orcnt) {
282 spin_lock_irqsave(&p->tx_list.lock, flags);
283
284 mix_orcnt.u64 = cvmx_read_csr(p->mix + MIX_ORCNT);
285
286 if (mix_orcnt.s.orcnt == 0) {
287 spin_unlock_irqrestore(&p->tx_list.lock, flags);
288 break;
289 }
290
291 dma_sync_single_for_cpu(p->dev, p->tx_ring_handle,
292 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
293 DMA_BIDIRECTIONAL);
294
295 re.d64 = p->tx_ring[p->tx_next_clean];
296 p->tx_next_clean =
297 (p->tx_next_clean + 1) % OCTEON_MGMT_TX_RING_SIZE;
298 skb = __skb_dequeue(&p->tx_list);
299
300 mix_orcnt.u64 = 0;
301 mix_orcnt.s.orcnt = 1;
302
303 /* Acknowledge to hardware that we have the buffer. */
304 cvmx_write_csr(p->mix + MIX_ORCNT, mix_orcnt.u64);
305 p->tx_current_fill--;
306
307 spin_unlock_irqrestore(&p->tx_list.lock, flags);
308
309 dma_unmap_single(p->dev, re.s.addr, re.s.len,
310 DMA_TO_DEVICE);
311
312 /* Read the hardware TX timestamp if one was recorded */
313 if (unlikely(re.s.tstamp)) {
314 struct skb_shared_hwtstamps ts;
315 /* Read the timestamp */
316 u64 ns = cvmx_read_csr(CVMX_MIXX_TSTAMP(p->port));
317 /* Remove the timestamp from the FIFO */
318 cvmx_write_csr(CVMX_MIXX_TSCTL(p->port), 0);
319 /* Tell the kernel about the timestamp */
320 ts.syststamp = ptp_to_ktime(ns);
321 ts.hwtstamp = ns_to_ktime(ns);
322 skb_tstamp_tx(skb, &ts);
323 }
324
325 dev_kfree_skb_any(skb);
326 cleaned++;
327
328 mix_orcnt.u64 = cvmx_read_csr(p->mix + MIX_ORCNT);
329 }
330
331 if (cleaned && netif_queue_stopped(p->netdev))
332 netif_wake_queue(p->netdev);
333 }
334
335 static void octeon_mgmt_clean_tx_tasklet(unsigned long arg)
336 {
337 struct octeon_mgmt *p = (struct octeon_mgmt *)arg;
338 octeon_mgmt_clean_tx_buffers(p);
339 octeon_mgmt_enable_tx_irq(p);
340 }
341
342 static void octeon_mgmt_update_rx_stats(struct net_device *netdev)
343 {
344 struct octeon_mgmt *p = netdev_priv(netdev);
345 unsigned long flags;
346 u64 drop, bad;
347
348 /* These reads also clear the count registers. */
349 drop = cvmx_read_csr(p->agl + AGL_GMX_RX_STATS_PKTS_DRP);
350 bad = cvmx_read_csr(p->agl + AGL_GMX_RX_STATS_PKTS_BAD);
351
352 if (drop || bad) {
353 /* Do an atomic update. */
354 spin_lock_irqsave(&p->lock, flags);
355 netdev->stats.rx_errors += bad;
356 netdev->stats.rx_dropped += drop;
357 spin_unlock_irqrestore(&p->lock, flags);
358 }
359 }
360
361 static void octeon_mgmt_update_tx_stats(struct net_device *netdev)
362 {
363 struct octeon_mgmt *p = netdev_priv(netdev);
364 unsigned long flags;
365
366 union cvmx_agl_gmx_txx_stat0 s0;
367 union cvmx_agl_gmx_txx_stat1 s1;
368
369 /* These reads also clear the count registers. */
370 s0.u64 = cvmx_read_csr(p->agl + AGL_GMX_TX_STAT0);
371 s1.u64 = cvmx_read_csr(p->agl + AGL_GMX_TX_STAT1);
372
373 if (s0.s.xsdef || s0.s.xscol || s1.s.scol || s1.s.mcol) {
374 /* Do an atomic update. */
375 spin_lock_irqsave(&p->lock, flags);
376 netdev->stats.tx_errors += s0.s.xsdef + s0.s.xscol;
377 netdev->stats.collisions += s1.s.scol + s1.s.mcol;
378 spin_unlock_irqrestore(&p->lock, flags);
379 }
380 }
381
382 /*
383 * Dequeue a receive skb and its corresponding ring entry. The ring
384 * entry is returned, *pskb is updated to point to the skb.
385 */
386 static u64 octeon_mgmt_dequeue_rx_buffer(struct octeon_mgmt *p,
387 struct sk_buff **pskb)
388 {
389 union mgmt_port_ring_entry re;
390
391 dma_sync_single_for_cpu(p->dev, p->rx_ring_handle,
392 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
393 DMA_BIDIRECTIONAL);
394
395 re.d64 = p->rx_ring[p->rx_next];
396 p->rx_next = (p->rx_next + 1) % OCTEON_MGMT_RX_RING_SIZE;
397 p->rx_current_fill--;
398 *pskb = __skb_dequeue(&p->rx_list);
399
400 dma_unmap_single(p->dev, re.s.addr,
401 ETH_FRAME_LEN + OCTEON_MGMT_RX_HEADROOM,
402 DMA_FROM_DEVICE);
403
404 return re.d64;
405 }
406
407
408 static int octeon_mgmt_receive_one(struct octeon_mgmt *p)
409 {
410 struct net_device *netdev = p->netdev;
411 union cvmx_mixx_ircnt mix_ircnt;
412 union mgmt_port_ring_entry re;
413 struct sk_buff *skb;
414 struct sk_buff *skb2;
415 struct sk_buff *skb_new;
416 union mgmt_port_ring_entry re2;
417 int rc = 1;
418
419
420 re.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb);
421 if (likely(re.s.code == RING_ENTRY_CODE_DONE)) {
422 /* A good packet, send it up. */
423 skb_put(skb, re.s.len);
424 good:
425 /* Process the RX timestamp if it was recorded */
426 if (p->has_rx_tstamp) {
427 /* The first 8 bytes are the timestamp */
428 u64 ns = *(u64 *)skb->data;
429 struct skb_shared_hwtstamps *ts;
430 ts = skb_hwtstamps(skb);
431 ts->hwtstamp = ns_to_ktime(ns);
432 ts->syststamp = ptp_to_ktime(ns);
433 __skb_pull(skb, 8);
434 }
435 skb->protocol = eth_type_trans(skb, netdev);
436 netdev->stats.rx_packets++;
437 netdev->stats.rx_bytes += skb->len;
438 netif_receive_skb(skb);
439 rc = 0;
440 } else if (re.s.code == RING_ENTRY_CODE_MORE) {
441 /* Packet split across skbs. This can happen if we
442 * increase the MTU. Buffers that are already in the
443 * rx ring can then end up being too small. As the rx
444 * ring is refilled, buffers sized for the new MTU
445 * will be used and we should go back to the normal
446 * non-split case.
447 */
448 skb_put(skb, re.s.len);
449 do {
450 re2.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb2);
451 if (re2.s.code != RING_ENTRY_CODE_MORE
452 && re2.s.code != RING_ENTRY_CODE_DONE)
453 goto split_error;
454 skb_put(skb2, re2.s.len);
455 skb_new = skb_copy_expand(skb, 0, skb2->len,
456 GFP_ATOMIC);
457 if (!skb_new)
458 goto split_error;
459 if (skb_copy_bits(skb2, 0, skb_tail_pointer(skb_new),
460 skb2->len))
461 goto split_error;
462 skb_put(skb_new, skb2->len);
463 dev_kfree_skb_any(skb);
464 dev_kfree_skb_any(skb2);
465 skb = skb_new;
466 } while (re2.s.code == RING_ENTRY_CODE_MORE);
467 goto good;
468 } else {
469 /* Some other error, discard it. */
470 dev_kfree_skb_any(skb);
471 /* Error statistics are accumulated in
472 * octeon_mgmt_update_rx_stats.
473 */
474 }
475 goto done;
476 split_error:
477 /* Discard the whole mess. */
478 dev_kfree_skb_any(skb);
479 dev_kfree_skb_any(skb2);
480 while (re2.s.code == RING_ENTRY_CODE_MORE) {
481 re2.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb2);
482 dev_kfree_skb_any(skb2);
483 }
484 netdev->stats.rx_errors++;
485
486 done:
487 /* Tell the hardware we processed a packet. */
488 mix_ircnt.u64 = 0;
489 mix_ircnt.s.ircnt = 1;
490 cvmx_write_csr(p->mix + MIX_IRCNT, mix_ircnt.u64);
491 return rc;
492 }
493
494 static int octeon_mgmt_receive_packets(struct octeon_mgmt *p, int budget)
495 {
496 unsigned int work_done = 0;
497 union cvmx_mixx_ircnt mix_ircnt;
498 int rc;
499
500 mix_ircnt.u64 = cvmx_read_csr(p->mix + MIX_IRCNT);
501 while (work_done < budget && mix_ircnt.s.ircnt) {
502
503 rc = octeon_mgmt_receive_one(p);
504 if (!rc)
505 work_done++;
506
507 /* Check for more packets. */
508 mix_ircnt.u64 = cvmx_read_csr(p->mix + MIX_IRCNT);
509 }
510
511 octeon_mgmt_rx_fill_ring(p->netdev);
512
513 return work_done;
514 }
515
516 static int octeon_mgmt_napi_poll(struct napi_struct *napi, int budget)
517 {
518 struct octeon_mgmt *p = container_of(napi, struct octeon_mgmt, napi);
519 struct net_device *netdev = p->netdev;
520 unsigned int work_done = 0;
521
522 work_done = octeon_mgmt_receive_packets(p, budget);
523
524 if (work_done < budget) {
525 /* We stopped because no more packets were available. */
526 napi_complete(napi);
527 octeon_mgmt_enable_rx_irq(p);
528 }
529 octeon_mgmt_update_rx_stats(netdev);
530
531 return work_done;
532 }
533
534 /* Reset the hardware to clean state. */
535 static void octeon_mgmt_reset_hw(struct octeon_mgmt *p)
536 {
537 union cvmx_mixx_ctl mix_ctl;
538 union cvmx_mixx_bist mix_bist;
539 union cvmx_agl_gmx_bist agl_gmx_bist;
540
541 mix_ctl.u64 = 0;
542 cvmx_write_csr(p->mix + MIX_CTL, mix_ctl.u64);
543 do {
544 mix_ctl.u64 = cvmx_read_csr(p->mix + MIX_CTL);
545 } while (mix_ctl.s.busy);
546 mix_ctl.s.reset = 1;
547 cvmx_write_csr(p->mix + MIX_CTL, mix_ctl.u64);
548 cvmx_read_csr(p->mix + MIX_CTL);
549 octeon_io_clk_delay(64);
550
551 mix_bist.u64 = cvmx_read_csr(p->mix + MIX_BIST);
552 if (mix_bist.u64)
553 dev_warn(p->dev, "MIX failed BIST (0x%016llx)\n",
554 (unsigned long long)mix_bist.u64);
555
556 agl_gmx_bist.u64 = cvmx_read_csr(CVMX_AGL_GMX_BIST);
557 if (agl_gmx_bist.u64)
558 dev_warn(p->dev, "AGL failed BIST (0x%016llx)\n",
559 (unsigned long long)agl_gmx_bist.u64);
560 }
561
562 struct octeon_mgmt_cam_state {
563 u64 cam[6];
564 u64 cam_mask;
565 int cam_index;
566 };
567
568 static void octeon_mgmt_cam_state_add(struct octeon_mgmt_cam_state *cs,
569 unsigned char *addr)
570 {
571 int i;
572
573 for (i = 0; i < 6; i++)
574 cs->cam[i] |= (u64)addr[i] << (8 * (cs->cam_index));
575 cs->cam_mask |= (1ULL << cs->cam_index);
576 cs->cam_index++;
577 }
578
579 static void octeon_mgmt_set_rx_filtering(struct net_device *netdev)
580 {
581 struct octeon_mgmt *p = netdev_priv(netdev);
582 union cvmx_agl_gmx_rxx_adr_ctl adr_ctl;
583 union cvmx_agl_gmx_prtx_cfg agl_gmx_prtx;
584 unsigned long flags;
585 unsigned int prev_packet_enable;
586 unsigned int cam_mode = 1; /* 1 - Accept on CAM match */
587 unsigned int multicast_mode = 1; /* 1 - Reject all multicast. */
588 struct octeon_mgmt_cam_state cam_state;
589 struct netdev_hw_addr *ha;
590 int available_cam_entries;
591
592 memset(&cam_state, 0, sizeof(cam_state));
593
594 if ((netdev->flags & IFF_PROMISC) || netdev->uc.count > 7) {
595 cam_mode = 0;
596 available_cam_entries = 8;
597 } else {
598 /* One CAM entry for the primary address, leaves seven
599 * for the secondary addresses.
600 */
601 available_cam_entries = 7 - netdev->uc.count;
602 }
603
604 if (netdev->flags & IFF_MULTICAST) {
605 if (cam_mode == 0 || (netdev->flags & IFF_ALLMULTI) ||
606 netdev_mc_count(netdev) > available_cam_entries)
607 multicast_mode = 2; /* 2 - Accept all multicast. */
608 else
609 multicast_mode = 0; /* 0 - Use CAM. */
610 }
611
612 if (cam_mode == 1) {
613 /* Add primary address. */
614 octeon_mgmt_cam_state_add(&cam_state, netdev->dev_addr);
615 netdev_for_each_uc_addr(ha, netdev)
616 octeon_mgmt_cam_state_add(&cam_state, ha->addr);
617 }
618 if (multicast_mode == 0) {
619 netdev_for_each_mc_addr(ha, netdev)
620 octeon_mgmt_cam_state_add(&cam_state, ha->addr);
621 }
622
623 spin_lock_irqsave(&p->lock, flags);
624
625 /* Disable packet I/O. */
626 agl_gmx_prtx.u64 = cvmx_read_csr(p->agl + AGL_GMX_PRT_CFG);
627 prev_packet_enable = agl_gmx_prtx.s.en;
628 agl_gmx_prtx.s.en = 0;
629 cvmx_write_csr(p->agl + AGL_GMX_PRT_CFG, agl_gmx_prtx.u64);
630
631 adr_ctl.u64 = 0;
632 adr_ctl.s.cam_mode = cam_mode;
633 adr_ctl.s.mcst = multicast_mode;
634 adr_ctl.s.bcst = 1; /* Allow broadcast */
635
636 cvmx_write_csr(p->agl + AGL_GMX_RX_ADR_CTL, adr_ctl.u64);
637
638 cvmx_write_csr(p->agl + AGL_GMX_RX_ADR_CAM0, cam_state.cam[0]);
639 cvmx_write_csr(p->agl + AGL_GMX_RX_ADR_CAM1, cam_state.cam[1]);
640 cvmx_write_csr(p->agl + AGL_GMX_RX_ADR_CAM2, cam_state.cam[2]);
641 cvmx_write_csr(p->agl + AGL_GMX_RX_ADR_CAM3, cam_state.cam[3]);
642 cvmx_write_csr(p->agl + AGL_GMX_RX_ADR_CAM4, cam_state.cam[4]);
643 cvmx_write_csr(p->agl + AGL_GMX_RX_ADR_CAM5, cam_state.cam[5]);
644 cvmx_write_csr(p->agl + AGL_GMX_RX_ADR_CAM_EN, cam_state.cam_mask);
645
646 /* Restore packet I/O. */
647 agl_gmx_prtx.s.en = prev_packet_enable;
648 cvmx_write_csr(p->agl + AGL_GMX_PRT_CFG, agl_gmx_prtx.u64);
649
650 spin_unlock_irqrestore(&p->lock, flags);
651 }
652
653 static int octeon_mgmt_set_mac_address(struct net_device *netdev, void *addr)
654 {
655 int r = eth_mac_addr(netdev, addr);
656
657 if (r)
658 return r;
659
660 octeon_mgmt_set_rx_filtering(netdev);
661
662 return 0;
663 }
664
665 static int octeon_mgmt_change_mtu(struct net_device *netdev, int new_mtu)
666 {
667 struct octeon_mgmt *p = netdev_priv(netdev);
668 int size_without_fcs = new_mtu + OCTEON_MGMT_RX_HEADROOM;
669
670 /* Limit the MTU to make sure the ethernet packets are between
671 * 64 bytes and 16383 bytes.
672 */
673 if (size_without_fcs < 64 || size_without_fcs > 16383) {
674 dev_warn(p->dev, "MTU must be between %d and %d.\n",
675 64 - OCTEON_MGMT_RX_HEADROOM,
676 16383 - OCTEON_MGMT_RX_HEADROOM);
677 return -EINVAL;
678 }
679
680 netdev->mtu = new_mtu;
681
682 cvmx_write_csr(p->agl + AGL_GMX_RX_FRM_MAX, size_without_fcs);
683 cvmx_write_csr(p->agl + AGL_GMX_RX_JABBER,
684 (size_without_fcs + 7) & 0xfff8);
685
686 return 0;
687 }
688
689 static irqreturn_t octeon_mgmt_interrupt(int cpl, void *dev_id)
690 {
691 struct net_device *netdev = dev_id;
692 struct octeon_mgmt *p = netdev_priv(netdev);
693 union cvmx_mixx_isr mixx_isr;
694
695 mixx_isr.u64 = cvmx_read_csr(p->mix + MIX_ISR);
696
697 /* Clear any pending interrupts */
698 cvmx_write_csr(p->mix + MIX_ISR, mixx_isr.u64);
699 cvmx_read_csr(p->mix + MIX_ISR);
700
701 if (mixx_isr.s.irthresh) {
702 octeon_mgmt_disable_rx_irq(p);
703 napi_schedule(&p->napi);
704 }
705 if (mixx_isr.s.orthresh) {
706 octeon_mgmt_disable_tx_irq(p);
707 tasklet_schedule(&p->tx_clean_tasklet);
708 }
709
710 return IRQ_HANDLED;
711 }
712
713 static int octeon_mgmt_ioctl_hwtstamp(struct net_device *netdev,
714 struct ifreq *rq, int cmd)
715 {
716 struct octeon_mgmt *p = netdev_priv(netdev);
717 struct hwtstamp_config config;
718 union cvmx_mio_ptp_clock_cfg ptp;
719 union cvmx_agl_gmx_rxx_frm_ctl rxx_frm_ctl;
720 bool have_hw_timestamps = false;
721
722 if (copy_from_user(&config, rq->ifr_data, sizeof(config)))
723 return -EFAULT;
724
725 if (config.flags) /* reserved for future extensions */
726 return -EINVAL;
727
728 /* Check the status of hardware for tiemstamps */
729 if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
730 /* Get the current state of the PTP clock */
731 ptp.u64 = cvmx_read_csr(CVMX_MIO_PTP_CLOCK_CFG);
732 if (!ptp.s.ext_clk_en) {
733 /* The clock has not been configured to use an
734 * external source. Program it to use the main clock
735 * reference.
736 */
737 u64 clock_comp = (NSEC_PER_SEC << 32) / octeon_get_io_clock_rate();
738 if (!ptp.s.ptp_en)
739 cvmx_write_csr(CVMX_MIO_PTP_CLOCK_COMP, clock_comp);
740 pr_info("PTP Clock: Using sclk reference at %lld Hz\n",
741 (NSEC_PER_SEC << 32) / clock_comp);
742 } else {
743 /* The clock is already programmed to use a GPIO */
744 u64 clock_comp = cvmx_read_csr(CVMX_MIO_PTP_CLOCK_COMP);
745 pr_info("PTP Clock: Using GPIO %d at %lld Hz\n",
746 ptp.s.ext_clk_in,
747 (NSEC_PER_SEC << 32) / clock_comp);
748 }
749
750 /* Enable the clock if it wasn't done already */
751 if (!ptp.s.ptp_en) {
752 ptp.s.ptp_en = 1;
753 cvmx_write_csr(CVMX_MIO_PTP_CLOCK_CFG, ptp.u64);
754 }
755 have_hw_timestamps = true;
756 }
757
758 if (!have_hw_timestamps)
759 return -EINVAL;
760
761 switch (config.tx_type) {
762 case HWTSTAMP_TX_OFF:
763 case HWTSTAMP_TX_ON:
764 break;
765 default:
766 return -ERANGE;
767 }
768
769 switch (config.rx_filter) {
770 case HWTSTAMP_FILTER_NONE:
771 p->has_rx_tstamp = false;
772 rxx_frm_ctl.u64 = cvmx_read_csr(p->agl + AGL_GMX_RX_FRM_CTL);
773 rxx_frm_ctl.s.ptp_mode = 0;
774 cvmx_write_csr(p->agl + AGL_GMX_RX_FRM_CTL, rxx_frm_ctl.u64);
775 break;
776 case HWTSTAMP_FILTER_ALL:
777 case HWTSTAMP_FILTER_SOME:
778 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
779 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
780 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
781 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
782 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
783 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
784 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
785 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
786 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
787 case HWTSTAMP_FILTER_PTP_V2_EVENT:
788 case HWTSTAMP_FILTER_PTP_V2_SYNC:
789 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
790 p->has_rx_tstamp = have_hw_timestamps;
791 config.rx_filter = HWTSTAMP_FILTER_ALL;
792 if (p->has_rx_tstamp) {
793 rxx_frm_ctl.u64 = cvmx_read_csr(p->agl + AGL_GMX_RX_FRM_CTL);
794 rxx_frm_ctl.s.ptp_mode = 1;
795 cvmx_write_csr(p->agl + AGL_GMX_RX_FRM_CTL, rxx_frm_ctl.u64);
796 }
797 break;
798 default:
799 return -ERANGE;
800 }
801
802 if (copy_to_user(rq->ifr_data, &config, sizeof(config)))
803 return -EFAULT;
804
805 return 0;
806 }
807
808 static int octeon_mgmt_ioctl(struct net_device *netdev,
809 struct ifreq *rq, int cmd)
810 {
811 struct octeon_mgmt *p = netdev_priv(netdev);
812
813 switch (cmd) {
814 case SIOCSHWTSTAMP:
815 return octeon_mgmt_ioctl_hwtstamp(netdev, rq, cmd);
816 default:
817 if (p->phydev)
818 return phy_mii_ioctl(p->phydev, rq, cmd);
819 return -EINVAL;
820 }
821 }
822
823 static void octeon_mgmt_disable_link(struct octeon_mgmt *p)
824 {
825 union cvmx_agl_gmx_prtx_cfg prtx_cfg;
826
827 /* Disable GMX before we make any changes. */
828 prtx_cfg.u64 = cvmx_read_csr(p->agl + AGL_GMX_PRT_CFG);
829 prtx_cfg.s.en = 0;
830 prtx_cfg.s.tx_en = 0;
831 prtx_cfg.s.rx_en = 0;
832 cvmx_write_csr(p->agl + AGL_GMX_PRT_CFG, prtx_cfg.u64);
833
834 if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
835 int i;
836 for (i = 0; i < 10; i++) {
837 prtx_cfg.u64 = cvmx_read_csr(p->agl + AGL_GMX_PRT_CFG);
838 if (prtx_cfg.s.tx_idle == 1 || prtx_cfg.s.rx_idle == 1)
839 break;
840 mdelay(1);
841 i++;
842 }
843 }
844 }
845
846 static void octeon_mgmt_enable_link(struct octeon_mgmt *p)
847 {
848 union cvmx_agl_gmx_prtx_cfg prtx_cfg;
849
850 /* Restore the GMX enable state only if link is set */
851 prtx_cfg.u64 = cvmx_read_csr(p->agl + AGL_GMX_PRT_CFG);
852 prtx_cfg.s.tx_en = 1;
853 prtx_cfg.s.rx_en = 1;
854 prtx_cfg.s.en = 1;
855 cvmx_write_csr(p->agl + AGL_GMX_PRT_CFG, prtx_cfg.u64);
856 }
857
858 static void octeon_mgmt_update_link(struct octeon_mgmt *p)
859 {
860 union cvmx_agl_gmx_prtx_cfg prtx_cfg;
861
862 prtx_cfg.u64 = cvmx_read_csr(p->agl + AGL_GMX_PRT_CFG);
863
864 if (!p->phydev->link)
865 prtx_cfg.s.duplex = 1;
866 else
867 prtx_cfg.s.duplex = p->phydev->duplex;
868
869 switch (p->phydev->speed) {
870 case 10:
871 prtx_cfg.s.speed = 0;
872 prtx_cfg.s.slottime = 0;
873
874 if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
875 prtx_cfg.s.burst = 1;
876 prtx_cfg.s.speed_msb = 1;
877 }
878 break;
879 case 100:
880 prtx_cfg.s.speed = 0;
881 prtx_cfg.s.slottime = 0;
882
883 if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
884 prtx_cfg.s.burst = 1;
885 prtx_cfg.s.speed_msb = 0;
886 }
887 break;
888 case 1000:
889 /* 1000 MBits is only supported on 6XXX chips */
890 if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
891 prtx_cfg.s.speed = 1;
892 prtx_cfg.s.speed_msb = 0;
893 /* Only matters for half-duplex */
894 prtx_cfg.s.slottime = 1;
895 prtx_cfg.s.burst = p->phydev->duplex;
896 }
897 break;
898 case 0: /* No link */
899 default:
900 break;
901 }
902
903 /* Write the new GMX setting with the port still disabled. */
904 cvmx_write_csr(p->agl + AGL_GMX_PRT_CFG, prtx_cfg.u64);
905
906 /* Read GMX CFG again to make sure the config is completed. */
907 prtx_cfg.u64 = cvmx_read_csr(p->agl + AGL_GMX_PRT_CFG);
908
909 if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
910 union cvmx_agl_gmx_txx_clk agl_clk;
911 union cvmx_agl_prtx_ctl prtx_ctl;
912
913 prtx_ctl.u64 = cvmx_read_csr(p->agl_prt_ctl);
914 agl_clk.u64 = cvmx_read_csr(p->agl + AGL_GMX_TX_CLK);
915 /* MII (both speeds) and RGMII 1000 speed. */
916 agl_clk.s.clk_cnt = 1;
917 if (prtx_ctl.s.mode == 0) { /* RGMII mode */
918 if (p->phydev->speed == 10)
919 agl_clk.s.clk_cnt = 50;
920 else if (p->phydev->speed == 100)
921 agl_clk.s.clk_cnt = 5;
922 }
923 cvmx_write_csr(p->agl + AGL_GMX_TX_CLK, agl_clk.u64);
924 }
925 }
926
927 static void octeon_mgmt_adjust_link(struct net_device *netdev)
928 {
929 struct octeon_mgmt *p = netdev_priv(netdev);
930 unsigned long flags;
931 int link_changed = 0;
932
933 if (!p->phydev)
934 return;
935
936 spin_lock_irqsave(&p->lock, flags);
937
938
939 if (!p->phydev->link && p->last_link)
940 link_changed = -1;
941
942 if (p->phydev->link
943 && (p->last_duplex != p->phydev->duplex
944 || p->last_link != p->phydev->link
945 || p->last_speed != p->phydev->speed)) {
946 octeon_mgmt_disable_link(p);
947 link_changed = 1;
948 octeon_mgmt_update_link(p);
949 octeon_mgmt_enable_link(p);
950 }
951
952 p->last_link = p->phydev->link;
953 p->last_speed = p->phydev->speed;
954 p->last_duplex = p->phydev->duplex;
955
956 spin_unlock_irqrestore(&p->lock, flags);
957
958 if (link_changed != 0) {
959 if (link_changed > 0) {
960 pr_info("%s: Link is up - %d/%s\n", netdev->name,
961 p->phydev->speed,
962 DUPLEX_FULL == p->phydev->duplex ?
963 "Full" : "Half");
964 } else {
965 pr_info("%s: Link is down\n", netdev->name);
966 }
967 }
968 }
969
970 static int octeon_mgmt_init_phy(struct net_device *netdev)
971 {
972 struct octeon_mgmt *p = netdev_priv(netdev);
973
974 if (octeon_is_simulation() || p->phy_np == NULL) {
975 /* No PHYs in the simulator. */
976 netif_carrier_on(netdev);
977 return 0;
978 }
979
980 p->phydev = of_phy_connect(netdev, p->phy_np,
981 octeon_mgmt_adjust_link, 0,
982 PHY_INTERFACE_MODE_MII);
983
984 if (!p->phydev)
985 return -ENODEV;
986
987 return 0;
988 }
989
990 static int octeon_mgmt_open(struct net_device *netdev)
991 {
992 struct octeon_mgmt *p = netdev_priv(netdev);
993 union cvmx_mixx_ctl mix_ctl;
994 union cvmx_agl_gmx_inf_mode agl_gmx_inf_mode;
995 union cvmx_mixx_oring1 oring1;
996 union cvmx_mixx_iring1 iring1;
997 union cvmx_agl_gmx_rxx_frm_ctl rxx_frm_ctl;
998 union cvmx_mixx_irhwm mix_irhwm;
999 union cvmx_mixx_orhwm mix_orhwm;
1000 union cvmx_mixx_intena mix_intena;
1001 struct sockaddr sa;
1002
1003 /* Allocate ring buffers. */
1004 p->tx_ring = kzalloc(ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
1005 GFP_KERNEL);
1006 if (!p->tx_ring)
1007 return -ENOMEM;
1008 p->tx_ring_handle =
1009 dma_map_single(p->dev, p->tx_ring,
1010 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
1011 DMA_BIDIRECTIONAL);
1012 p->tx_next = 0;
1013 p->tx_next_clean = 0;
1014 p->tx_current_fill = 0;
1015
1016
1017 p->rx_ring = kzalloc(ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
1018 GFP_KERNEL);
1019 if (!p->rx_ring)
1020 goto err_nomem;
1021 p->rx_ring_handle =
1022 dma_map_single(p->dev, p->rx_ring,
1023 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
1024 DMA_BIDIRECTIONAL);
1025
1026 p->rx_next = 0;
1027 p->rx_next_fill = 0;
1028 p->rx_current_fill = 0;
1029
1030 octeon_mgmt_reset_hw(p);
1031
1032 mix_ctl.u64 = cvmx_read_csr(p->mix + MIX_CTL);
1033
1034 /* Bring it out of reset if needed. */
1035 if (mix_ctl.s.reset) {
1036 mix_ctl.s.reset = 0;
1037 cvmx_write_csr(p->mix + MIX_CTL, mix_ctl.u64);
1038 do {
1039 mix_ctl.u64 = cvmx_read_csr(p->mix + MIX_CTL);
1040 } while (mix_ctl.s.reset);
1041 }
1042
1043 if (OCTEON_IS_MODEL(OCTEON_CN5XXX)) {
1044 agl_gmx_inf_mode.u64 = 0;
1045 agl_gmx_inf_mode.s.en = 1;
1046 cvmx_write_csr(CVMX_AGL_GMX_INF_MODE, agl_gmx_inf_mode.u64);
1047 }
1048 if (OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)
1049 || OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) {
1050 /* Force compensation values, as they are not
1051 * determined properly by HW
1052 */
1053 union cvmx_agl_gmx_drv_ctl drv_ctl;
1054
1055 drv_ctl.u64 = cvmx_read_csr(CVMX_AGL_GMX_DRV_CTL);
1056 if (p->port) {
1057 drv_ctl.s.byp_en1 = 1;
1058 drv_ctl.s.nctl1 = 6;
1059 drv_ctl.s.pctl1 = 6;
1060 } else {
1061 drv_ctl.s.byp_en = 1;
1062 drv_ctl.s.nctl = 6;
1063 drv_ctl.s.pctl = 6;
1064 }
1065 cvmx_write_csr(CVMX_AGL_GMX_DRV_CTL, drv_ctl.u64);
1066 }
1067
1068 oring1.u64 = 0;
1069 oring1.s.obase = p->tx_ring_handle >> 3;
1070 oring1.s.osize = OCTEON_MGMT_TX_RING_SIZE;
1071 cvmx_write_csr(p->mix + MIX_ORING1, oring1.u64);
1072
1073 iring1.u64 = 0;
1074 iring1.s.ibase = p->rx_ring_handle >> 3;
1075 iring1.s.isize = OCTEON_MGMT_RX_RING_SIZE;
1076 cvmx_write_csr(p->mix + MIX_IRING1, iring1.u64);
1077
1078 memcpy(sa.sa_data, netdev->dev_addr, ETH_ALEN);
1079 octeon_mgmt_set_mac_address(netdev, &sa);
1080
1081 octeon_mgmt_change_mtu(netdev, netdev->mtu);
1082
1083 /* Enable the port HW. Packets are not allowed until
1084 * cvmx_mgmt_port_enable() is called.
1085 */
1086 mix_ctl.u64 = 0;
1087 mix_ctl.s.crc_strip = 1; /* Strip the ending CRC */
1088 mix_ctl.s.en = 1; /* Enable the port */
1089 mix_ctl.s.nbtarb = 0; /* Arbitration mode */
1090 /* MII CB-request FIFO programmable high watermark */
1091 mix_ctl.s.mrq_hwm = 1;
1092 #ifdef __LITTLE_ENDIAN
1093 mix_ctl.s.lendian = 1;
1094 #endif
1095 cvmx_write_csr(p->mix + MIX_CTL, mix_ctl.u64);
1096
1097 /* Read the PHY to find the mode of the interface. */
1098 if (octeon_mgmt_init_phy(netdev)) {
1099 dev_err(p->dev, "Cannot initialize PHY on MIX%d.\n", p->port);
1100 goto err_noirq;
1101 }
1102
1103 /* Set the mode of the interface, RGMII/MII. */
1104 if (OCTEON_IS_MODEL(OCTEON_CN6XXX) && p->phydev) {
1105 union cvmx_agl_prtx_ctl agl_prtx_ctl;
1106 int rgmii_mode = (p->phydev->supported &
1107 (SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full)) != 0;
1108
1109 agl_prtx_ctl.u64 = cvmx_read_csr(p->agl_prt_ctl);
1110 agl_prtx_ctl.s.mode = rgmii_mode ? 0 : 1;
1111 cvmx_write_csr(p->agl_prt_ctl, agl_prtx_ctl.u64);
1112
1113 /* MII clocks counts are based on the 125Mhz
1114 * reference, which has an 8nS period. So our delays
1115 * need to be multiplied by this factor.
1116 */
1117 #define NS_PER_PHY_CLK 8
1118
1119 /* Take the DLL and clock tree out of reset */
1120 agl_prtx_ctl.u64 = cvmx_read_csr(p->agl_prt_ctl);
1121 agl_prtx_ctl.s.clkrst = 0;
1122 if (rgmii_mode) {
1123 agl_prtx_ctl.s.dllrst = 0;
1124 agl_prtx_ctl.s.clktx_byp = 0;
1125 }
1126 cvmx_write_csr(p->agl_prt_ctl, agl_prtx_ctl.u64);
1127 cvmx_read_csr(p->agl_prt_ctl); /* Force write out before wait */
1128
1129 /* Wait for the DLL to lock. External 125 MHz
1130 * reference clock must be stable at this point.
1131 */
1132 ndelay(256 * NS_PER_PHY_CLK);
1133
1134 /* Enable the interface */
1135 agl_prtx_ctl.u64 = cvmx_read_csr(p->agl_prt_ctl);
1136 agl_prtx_ctl.s.enable = 1;
1137 cvmx_write_csr(p->agl_prt_ctl, agl_prtx_ctl.u64);
1138
1139 /* Read the value back to force the previous write */
1140 agl_prtx_ctl.u64 = cvmx_read_csr(p->agl_prt_ctl);
1141
1142 /* Enable the compensation controller */
1143 agl_prtx_ctl.s.comp = 1;
1144 agl_prtx_ctl.s.drv_byp = 0;
1145 cvmx_write_csr(p->agl_prt_ctl, agl_prtx_ctl.u64);
1146 /* Force write out before wait. */
1147 cvmx_read_csr(p->agl_prt_ctl);
1148
1149 /* For compensation state to lock. */
1150 ndelay(1040 * NS_PER_PHY_CLK);
1151
1152 /* Default Interframe Gaps are too small. Recommended
1153 * workaround is.
1154 *
1155 * AGL_GMX_TX_IFG[IFG1]=14
1156 * AGL_GMX_TX_IFG[IFG2]=10
1157 */
1158 cvmx_write_csr(CVMX_AGL_GMX_TX_IFG, 0xae);
1159 }
1160
1161 octeon_mgmt_rx_fill_ring(netdev);
1162
1163 /* Clear statistics. */
1164 /* Clear on read. */
1165 cvmx_write_csr(p->agl + AGL_GMX_RX_STATS_CTL, 1);
1166 cvmx_write_csr(p->agl + AGL_GMX_RX_STATS_PKTS_DRP, 0);
1167 cvmx_write_csr(p->agl + AGL_GMX_RX_STATS_PKTS_BAD, 0);
1168
1169 cvmx_write_csr(p->agl + AGL_GMX_TX_STATS_CTL, 1);
1170 cvmx_write_csr(p->agl + AGL_GMX_TX_STAT0, 0);
1171 cvmx_write_csr(p->agl + AGL_GMX_TX_STAT1, 0);
1172
1173 /* Clear any pending interrupts */
1174 cvmx_write_csr(p->mix + MIX_ISR, cvmx_read_csr(p->mix + MIX_ISR));
1175
1176 if (request_irq(p->irq, octeon_mgmt_interrupt, 0, netdev->name,
1177 netdev)) {
1178 dev_err(p->dev, "request_irq(%d) failed.\n", p->irq);
1179 goto err_noirq;
1180 }
1181
1182 /* Interrupt every single RX packet */
1183 mix_irhwm.u64 = 0;
1184 mix_irhwm.s.irhwm = 0;
1185 cvmx_write_csr(p->mix + MIX_IRHWM, mix_irhwm.u64);
1186
1187 /* Interrupt when we have 1 or more packets to clean. */
1188 mix_orhwm.u64 = 0;
1189 mix_orhwm.s.orhwm = 0;
1190 cvmx_write_csr(p->mix + MIX_ORHWM, mix_orhwm.u64);
1191
1192 /* Enable receive and transmit interrupts */
1193 mix_intena.u64 = 0;
1194 mix_intena.s.ithena = 1;
1195 mix_intena.s.othena = 1;
1196 cvmx_write_csr(p->mix + MIX_INTENA, mix_intena.u64);
1197
1198 /* Enable packet I/O. */
1199
1200 rxx_frm_ctl.u64 = 0;
1201 rxx_frm_ctl.s.ptp_mode = p->has_rx_tstamp ? 1 : 0;
1202 rxx_frm_ctl.s.pre_align = 1;
1203 /* When set, disables the length check for non-min sized pkts
1204 * with padding in the client data.
1205 */
1206 rxx_frm_ctl.s.pad_len = 1;
1207 /* When set, disables the length check for VLAN pkts */
1208 rxx_frm_ctl.s.vlan_len = 1;
1209 /* When set, PREAMBLE checking is less strict */
1210 rxx_frm_ctl.s.pre_free = 1;
1211 /* Control Pause Frames can match station SMAC */
1212 rxx_frm_ctl.s.ctl_smac = 0;
1213 /* Control Pause Frames can match globally assign Multicast address */
1214 rxx_frm_ctl.s.ctl_mcst = 1;
1215 /* Forward pause information to TX block */
1216 rxx_frm_ctl.s.ctl_bck = 1;
1217 /* Drop Control Pause Frames */
1218 rxx_frm_ctl.s.ctl_drp = 1;
1219 /* Strip off the preamble */
1220 rxx_frm_ctl.s.pre_strp = 1;
1221 /* This port is configured to send PREAMBLE+SFD to begin every
1222 * frame. GMX checks that the PREAMBLE is sent correctly.
1223 */
1224 rxx_frm_ctl.s.pre_chk = 1;
1225 cvmx_write_csr(p->agl + AGL_GMX_RX_FRM_CTL, rxx_frm_ctl.u64);
1226
1227 /* Configure the port duplex, speed and enables */
1228 octeon_mgmt_disable_link(p);
1229 if (p->phydev)
1230 octeon_mgmt_update_link(p);
1231 octeon_mgmt_enable_link(p);
1232
1233 p->last_link = 0;
1234 p->last_speed = 0;
1235 /* PHY is not present in simulator. The carrier is enabled
1236 * while initializing the phy for simulator, leave it enabled.
1237 */
1238 if (p->phydev) {
1239 netif_carrier_off(netdev);
1240 phy_start_aneg(p->phydev);
1241 }
1242
1243 netif_wake_queue(netdev);
1244 napi_enable(&p->napi);
1245
1246 return 0;
1247 err_noirq:
1248 octeon_mgmt_reset_hw(p);
1249 dma_unmap_single(p->dev, p->rx_ring_handle,
1250 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
1251 DMA_BIDIRECTIONAL);
1252 kfree(p->rx_ring);
1253 err_nomem:
1254 dma_unmap_single(p->dev, p->tx_ring_handle,
1255 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
1256 DMA_BIDIRECTIONAL);
1257 kfree(p->tx_ring);
1258 return -ENOMEM;
1259 }
1260
1261 static int octeon_mgmt_stop(struct net_device *netdev)
1262 {
1263 struct octeon_mgmt *p = netdev_priv(netdev);
1264
1265 napi_disable(&p->napi);
1266 netif_stop_queue(netdev);
1267
1268 if (p->phydev)
1269 phy_disconnect(p->phydev);
1270 p->phydev = NULL;
1271
1272 netif_carrier_off(netdev);
1273
1274 octeon_mgmt_reset_hw(p);
1275
1276 free_irq(p->irq, netdev);
1277
1278 /* dma_unmap is a nop on Octeon, so just free everything. */
1279 skb_queue_purge(&p->tx_list);
1280 skb_queue_purge(&p->rx_list);
1281
1282 dma_unmap_single(p->dev, p->rx_ring_handle,
1283 ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
1284 DMA_BIDIRECTIONAL);
1285 kfree(p->rx_ring);
1286
1287 dma_unmap_single(p->dev, p->tx_ring_handle,
1288 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
1289 DMA_BIDIRECTIONAL);
1290 kfree(p->tx_ring);
1291
1292 return 0;
1293 }
1294
1295 static int octeon_mgmt_xmit(struct sk_buff *skb, struct net_device *netdev)
1296 {
1297 struct octeon_mgmt *p = netdev_priv(netdev);
1298 union mgmt_port_ring_entry re;
1299 unsigned long flags;
1300 int rv = NETDEV_TX_BUSY;
1301
1302 re.d64 = 0;
1303 re.s.tstamp = ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) != 0);
1304 re.s.len = skb->len;
1305 re.s.addr = dma_map_single(p->dev, skb->data,
1306 skb->len,
1307 DMA_TO_DEVICE);
1308
1309 spin_lock_irqsave(&p->tx_list.lock, flags);
1310
1311 if (unlikely(p->tx_current_fill >= ring_max_fill(OCTEON_MGMT_TX_RING_SIZE) - 1)) {
1312 spin_unlock_irqrestore(&p->tx_list.lock, flags);
1313 netif_stop_queue(netdev);
1314 spin_lock_irqsave(&p->tx_list.lock, flags);
1315 }
1316
1317 if (unlikely(p->tx_current_fill >=
1318 ring_max_fill(OCTEON_MGMT_TX_RING_SIZE))) {
1319 spin_unlock_irqrestore(&p->tx_list.lock, flags);
1320 dma_unmap_single(p->dev, re.s.addr, re.s.len,
1321 DMA_TO_DEVICE);
1322 goto out;
1323 }
1324
1325 __skb_queue_tail(&p->tx_list, skb);
1326
1327 /* Put it in the ring. */
1328 p->tx_ring[p->tx_next] = re.d64;
1329 p->tx_next = (p->tx_next + 1) % OCTEON_MGMT_TX_RING_SIZE;
1330 p->tx_current_fill++;
1331
1332 spin_unlock_irqrestore(&p->tx_list.lock, flags);
1333
1334 dma_sync_single_for_device(p->dev, p->tx_ring_handle,
1335 ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
1336 DMA_BIDIRECTIONAL);
1337
1338 netdev->stats.tx_packets++;
1339 netdev->stats.tx_bytes += skb->len;
1340
1341 /* Ring the bell. */
1342 cvmx_write_csr(p->mix + MIX_ORING2, 1);
1343
1344 netdev->trans_start = jiffies;
1345 rv = NETDEV_TX_OK;
1346 out:
1347 octeon_mgmt_update_tx_stats(netdev);
1348 return rv;
1349 }
1350
1351 #ifdef CONFIG_NET_POLL_CONTROLLER
1352 static void octeon_mgmt_poll_controller(struct net_device *netdev)
1353 {
1354 struct octeon_mgmt *p = netdev_priv(netdev);
1355
1356 octeon_mgmt_receive_packets(p, 16);
1357 octeon_mgmt_update_rx_stats(netdev);
1358 }
1359 #endif
1360
1361 static void octeon_mgmt_get_drvinfo(struct net_device *netdev,
1362 struct ethtool_drvinfo *info)
1363 {
1364 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1365 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1366 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
1367 strlcpy(info->bus_info, "N/A", sizeof(info->bus_info));
1368 info->n_stats = 0;
1369 info->testinfo_len = 0;
1370 info->regdump_len = 0;
1371 info->eedump_len = 0;
1372 }
1373
1374 static int octeon_mgmt_get_settings(struct net_device *netdev,
1375 struct ethtool_cmd *cmd)
1376 {
1377 struct octeon_mgmt *p = netdev_priv(netdev);
1378
1379 if (p->phydev)
1380 return phy_ethtool_gset(p->phydev, cmd);
1381
1382 return -EOPNOTSUPP;
1383 }
1384
1385 static int octeon_mgmt_set_settings(struct net_device *netdev,
1386 struct ethtool_cmd *cmd)
1387 {
1388 struct octeon_mgmt *p = netdev_priv(netdev);
1389
1390 if (!capable(CAP_NET_ADMIN))
1391 return -EPERM;
1392
1393 if (p->phydev)
1394 return phy_ethtool_sset(p->phydev, cmd);
1395
1396 return -EOPNOTSUPP;
1397 }
1398
1399 static int octeon_mgmt_nway_reset(struct net_device *dev)
1400 {
1401 struct octeon_mgmt *p = netdev_priv(dev);
1402
1403 if (!capable(CAP_NET_ADMIN))
1404 return -EPERM;
1405
1406 if (p->phydev)
1407 return phy_start_aneg(p->phydev);
1408
1409 return -EOPNOTSUPP;
1410 }
1411
1412 static const struct ethtool_ops octeon_mgmt_ethtool_ops = {
1413 .get_drvinfo = octeon_mgmt_get_drvinfo,
1414 .get_settings = octeon_mgmt_get_settings,
1415 .set_settings = octeon_mgmt_set_settings,
1416 .nway_reset = octeon_mgmt_nway_reset,
1417 .get_link = ethtool_op_get_link,
1418 };
1419
1420 static const struct net_device_ops octeon_mgmt_ops = {
1421 .ndo_open = octeon_mgmt_open,
1422 .ndo_stop = octeon_mgmt_stop,
1423 .ndo_start_xmit = octeon_mgmt_xmit,
1424 .ndo_set_rx_mode = octeon_mgmt_set_rx_filtering,
1425 .ndo_set_mac_address = octeon_mgmt_set_mac_address,
1426 .ndo_do_ioctl = octeon_mgmt_ioctl,
1427 .ndo_change_mtu = octeon_mgmt_change_mtu,
1428 #ifdef CONFIG_NET_POLL_CONTROLLER
1429 .ndo_poll_controller = octeon_mgmt_poll_controller,
1430 #endif
1431 };
1432
1433 static int octeon_mgmt_probe(struct platform_device *pdev)
1434 {
1435 struct net_device *netdev;
1436 struct octeon_mgmt *p;
1437 const __be32 *data;
1438 const u8 *mac;
1439 struct resource *res_mix;
1440 struct resource *res_agl;
1441 struct resource *res_agl_prt_ctl;
1442 int len;
1443 int result;
1444
1445 netdev = alloc_etherdev(sizeof(struct octeon_mgmt));
1446 if (netdev == NULL)
1447 return -ENOMEM;
1448
1449 SET_NETDEV_DEV(netdev, &pdev->dev);
1450
1451 platform_set_drvdata(pdev, netdev);
1452 p = netdev_priv(netdev);
1453 netif_napi_add(netdev, &p->napi, octeon_mgmt_napi_poll,
1454 OCTEON_MGMT_NAPI_WEIGHT);
1455
1456 p->netdev = netdev;
1457 p->dev = &pdev->dev;
1458 p->has_rx_tstamp = false;
1459
1460 data = of_get_property(pdev->dev.of_node, "cell-index", &len);
1461 if (data && len == sizeof(*data)) {
1462 p->port = be32_to_cpup(data);
1463 } else {
1464 dev_err(&pdev->dev, "no 'cell-index' property\n");
1465 result = -ENXIO;
1466 goto err;
1467 }
1468
1469 snprintf(netdev->name, IFNAMSIZ, "mgmt%d", p->port);
1470
1471 result = platform_get_irq(pdev, 0);
1472 if (result < 0)
1473 goto err;
1474
1475 p->irq = result;
1476
1477 res_mix = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1478 if (res_mix == NULL) {
1479 dev_err(&pdev->dev, "no 'reg' resource\n");
1480 result = -ENXIO;
1481 goto err;
1482 }
1483
1484 res_agl = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1485 if (res_agl == NULL) {
1486 dev_err(&pdev->dev, "no 'reg' resource\n");
1487 result = -ENXIO;
1488 goto err;
1489 }
1490
1491 res_agl_prt_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 3);
1492 if (res_agl_prt_ctl == NULL) {
1493 dev_err(&pdev->dev, "no 'reg' resource\n");
1494 result = -ENXIO;
1495 goto err;
1496 }
1497
1498 p->mix_phys = res_mix->start;
1499 p->mix_size = resource_size(res_mix);
1500 p->agl_phys = res_agl->start;
1501 p->agl_size = resource_size(res_agl);
1502 p->agl_prt_ctl_phys = res_agl_prt_ctl->start;
1503 p->agl_prt_ctl_size = resource_size(res_agl_prt_ctl);
1504
1505
1506 if (!devm_request_mem_region(&pdev->dev, p->mix_phys, p->mix_size,
1507 res_mix->name)) {
1508 dev_err(&pdev->dev, "request_mem_region (%s) failed\n",
1509 res_mix->name);
1510 result = -ENXIO;
1511 goto err;
1512 }
1513
1514 if (!devm_request_mem_region(&pdev->dev, p->agl_phys, p->agl_size,
1515 res_agl->name)) {
1516 result = -ENXIO;
1517 dev_err(&pdev->dev, "request_mem_region (%s) failed\n",
1518 res_agl->name);
1519 goto err;
1520 }
1521
1522 if (!devm_request_mem_region(&pdev->dev, p->agl_prt_ctl_phys,
1523 p->agl_prt_ctl_size, res_agl_prt_ctl->name)) {
1524 result = -ENXIO;
1525 dev_err(&pdev->dev, "request_mem_region (%s) failed\n",
1526 res_agl_prt_ctl->name);
1527 goto err;
1528 }
1529
1530 p->mix = (u64)devm_ioremap(&pdev->dev, p->mix_phys, p->mix_size);
1531 p->agl = (u64)devm_ioremap(&pdev->dev, p->agl_phys, p->agl_size);
1532 p->agl_prt_ctl = (u64)devm_ioremap(&pdev->dev, p->agl_prt_ctl_phys,
1533 p->agl_prt_ctl_size);
1534 spin_lock_init(&p->lock);
1535
1536 skb_queue_head_init(&p->tx_list);
1537 skb_queue_head_init(&p->rx_list);
1538 tasklet_init(&p->tx_clean_tasklet,
1539 octeon_mgmt_clean_tx_tasklet, (unsigned long)p);
1540
1541 netdev->priv_flags |= IFF_UNICAST_FLT;
1542
1543 netdev->netdev_ops = &octeon_mgmt_ops;
1544 netdev->ethtool_ops = &octeon_mgmt_ethtool_ops;
1545
1546 mac = of_get_mac_address(pdev->dev.of_node);
1547
1548 if (mac && is_valid_ether_addr(mac))
1549 memcpy(netdev->dev_addr, mac, ETH_ALEN);
1550 else
1551 eth_hw_addr_random(netdev);
1552
1553 p->phy_np = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
1554
1555 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
1556 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
1557
1558 netif_carrier_off(netdev);
1559 result = register_netdev(netdev);
1560 if (result)
1561 goto err;
1562
1563 dev_info(&pdev->dev, "Version " DRV_VERSION "\n");
1564 return 0;
1565
1566 err:
1567 free_netdev(netdev);
1568 return result;
1569 }
1570
1571 static int octeon_mgmt_remove(struct platform_device *pdev)
1572 {
1573 struct net_device *netdev = platform_get_drvdata(pdev);
1574
1575 unregister_netdev(netdev);
1576 free_netdev(netdev);
1577 return 0;
1578 }
1579
1580 static struct of_device_id octeon_mgmt_match[] = {
1581 {
1582 .compatible = "cavium,octeon-5750-mix",
1583 },
1584 {},
1585 };
1586 MODULE_DEVICE_TABLE(of, octeon_mgmt_match);
1587
1588 static struct platform_driver octeon_mgmt_driver = {
1589 .driver = {
1590 .name = "octeon_mgmt",
1591 .owner = THIS_MODULE,
1592 .of_match_table = octeon_mgmt_match,
1593 },
1594 .probe = octeon_mgmt_probe,
1595 .remove = octeon_mgmt_remove,
1596 };
1597
1598 extern void octeon_mdiobus_force_mod_depencency(void);
1599
1600 static int __init octeon_mgmt_mod_init(void)
1601 {
1602 /* Force our mdiobus driver module to be loaded first. */
1603 octeon_mdiobus_force_mod_depencency();
1604 return platform_driver_register(&octeon_mgmt_driver);
1605 }
1606
1607 static void __exit octeon_mgmt_mod_exit(void)
1608 {
1609 platform_driver_unregister(&octeon_mgmt_driver);
1610 }
1611
1612 module_init(octeon_mgmt_mod_init);
1613 module_exit(octeon_mgmt_mod_exit);
1614
1615 MODULE_DESCRIPTION(DRV_DESCRIPTION);
1616 MODULE_AUTHOR("David Daney");
1617 MODULE_LICENSE("GPL");
1618 MODULE_VERSION(DRV_VERSION);
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