1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2006-2007 PA Semi, Inc
4 *
5 * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs
6 */
7
8 #include <linux/module.h>
9 #include <linux/pci.h>
10 #include <linux/slab.h>
11 #include <linux/interrupt.h>
12 #include <linux/dmaengine.h>
13 #include <linux/delay.h>
14 #include <linux/netdevice.h>
15 #include <linux/of_mdio.h>
16 #include <linux/etherdevice.h>
17 #include <asm/dma-mapping.h>
18 #include <linux/in.h>
19 #include <linux/skbuff.h>
20
21 #include <linux/ip.h>
22 #include <net/checksum.h>
23 #include <linux/prefetch.h>
24
25 #include <asm/irq.h>
26 #include <asm/firmware.h>
27 #include <asm/pasemi_dma.h>
28
29 #include "pasemi_mac.h"
30
31 /* We have our own align, since ppc64 in general has it at 0 because
32 * of design flaws in some of the server bridge chips. However, for
33 * PWRficient doing the unaligned copies is more expensive than doing
34 * unaligned DMA, so make sure the data is aligned instead.
35 */
36 #define LOCAL_SKB_ALIGN 2
37
38 /* TODO list
39 *
40 * - Multicast support
41 * - Large MTU support
42 * - Multiqueue RX/TX
43 */
44
45 #define PE_MIN_MTU (ETH_ZLEN + ETH_HLEN)
46 #define PE_MAX_MTU 9000
47 #define PE_DEF_MTU ETH_DATA_LEN
48
49 #define DEFAULT_MSG_ENABLE \
50 (NETIF_MSG_DRV | \
51 NETIF_MSG_PROBE | \
52 NETIF_MSG_LINK | \
53 NETIF_MSG_TIMER | \
54 NETIF_MSG_IFDOWN | \
55 NETIF_MSG_IFUP | \
56 NETIF_MSG_RX_ERR | \
57 NETIF_MSG_TX_ERR)
58
59 MODULE_LICENSE("GPL");
60 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
61 MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
62
63 static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */
64 module_param(debug, int, 0);
65 MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
66
67 extern const struct ethtool_ops pasemi_mac_ethtool_ops;
68
translation_enabled(void)69 static int translation_enabled(void)
70 {
71 #if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE)
72 return 1;
73 #else
74 return firmware_has_feature(FW_FEATURE_LPAR);
75 #endif
76 }
77
write_iob_reg(unsigned int reg,unsigned int val)78 static void write_iob_reg(unsigned int reg, unsigned int val)
79 {
80 pasemi_write_iob_reg(reg, val);
81 }
82
read_mac_reg(const struct pasemi_mac * mac,unsigned int reg)83 static unsigned int read_mac_reg(const struct pasemi_mac *mac, unsigned int reg)
84 {
85 return pasemi_read_mac_reg(mac->dma_if, reg);
86 }
87
write_mac_reg(const struct pasemi_mac * mac,unsigned int reg,unsigned int val)88 static void write_mac_reg(const struct pasemi_mac *mac, unsigned int reg,
89 unsigned int val)
90 {
91 pasemi_write_mac_reg(mac->dma_if, reg, val);
92 }
93
read_dma_reg(unsigned int reg)94 static unsigned int read_dma_reg(unsigned int reg)
95 {
96 return pasemi_read_dma_reg(reg);
97 }
98
write_dma_reg(unsigned int reg,unsigned int val)99 static void write_dma_reg(unsigned int reg, unsigned int val)
100 {
101 pasemi_write_dma_reg(reg, val);
102 }
103
rx_ring(const struct pasemi_mac * mac)104 static struct pasemi_mac_rxring *rx_ring(const struct pasemi_mac *mac)
105 {
106 return mac->rx;
107 }
108
tx_ring(const struct pasemi_mac * mac)109 static struct pasemi_mac_txring *tx_ring(const struct pasemi_mac *mac)
110 {
111 return mac->tx;
112 }
113
prefetch_skb(const struct sk_buff * skb)114 static inline void prefetch_skb(const struct sk_buff *skb)
115 {
116 const void *d = skb;
117
118 prefetch(d);
119 prefetch(d+64);
120 prefetch(d+128);
121 prefetch(d+192);
122 }
123
mac_to_intf(struct pasemi_mac * mac)124 static int mac_to_intf(struct pasemi_mac *mac)
125 {
126 struct pci_dev *pdev = mac->pdev;
127 u32 tmp;
128 int nintf, off, i, j;
129 int devfn = pdev->devfn;
130
131 tmp = read_dma_reg(PAS_DMA_CAP_IFI);
132 nintf = (tmp & PAS_DMA_CAP_IFI_NIN_M) >> PAS_DMA_CAP_IFI_NIN_S;
133 off = (tmp & PAS_DMA_CAP_IFI_IOFF_M) >> PAS_DMA_CAP_IFI_IOFF_S;
134
135 /* IOFF contains the offset to the registers containing the
136 * DMA interface-to-MAC-pci-id mappings, and NIN contains number
137 * of total interfaces. Each register contains 4 devfns.
138 * Just do a linear search until we find the devfn of the MAC
139 * we're trying to look up.
140 */
141
142 for (i = 0; i < (nintf+3)/4; i++) {
143 tmp = read_dma_reg(off+4*i);
144 for (j = 0; j < 4; j++) {
145 if (((tmp >> (8*j)) & 0xff) == devfn)
146 return i*4 + j;
147 }
148 }
149 return -1;
150 }
151
pasemi_mac_intf_disable(struct pasemi_mac * mac)152 static void pasemi_mac_intf_disable(struct pasemi_mac *mac)
153 {
154 unsigned int flags;
155
156 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
157 flags &= ~PAS_MAC_CFG_PCFG_PE;
158 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
159 }
160
pasemi_mac_intf_enable(struct pasemi_mac * mac)161 static void pasemi_mac_intf_enable(struct pasemi_mac *mac)
162 {
163 unsigned int flags;
164
165 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
166 flags |= PAS_MAC_CFG_PCFG_PE;
167 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
168 }
169
pasemi_get_mac_addr(struct pasemi_mac * mac)170 static int pasemi_get_mac_addr(struct pasemi_mac *mac)
171 {
172 struct pci_dev *pdev = mac->pdev;
173 struct device_node *dn = pci_device_to_OF_node(pdev);
174 int len;
175 const u8 *maddr;
176 u8 addr[ETH_ALEN];
177
178 if (!dn) {
179 dev_dbg(&pdev->dev,
180 "No device node for mac, not configuring\n");
181 return -ENOENT;
182 }
183
184 maddr = of_get_property(dn, "local-mac-address", &len);
185
186 if (maddr && len == ETH_ALEN) {
187 memcpy(mac->mac_addr, maddr, ETH_ALEN);
188 return 0;
189 }
190
191 /* Some old versions of firmware mistakenly uses mac-address
192 * (and as a string) instead of a byte array in local-mac-address.
193 */
194
195 if (maddr == NULL)
196 maddr = of_get_property(dn, "mac-address", NULL);
197
198 if (maddr == NULL) {
199 dev_warn(&pdev->dev,
200 "no mac address in device tree, not configuring\n");
201 return -ENOENT;
202 }
203
204 if (!mac_pton(maddr, addr)) {
205 dev_warn(&pdev->dev,
206 "can't parse mac address, not configuring\n");
207 return -EINVAL;
208 }
209
210 memcpy(mac->mac_addr, addr, ETH_ALEN);
211
212 return 0;
213 }
214
pasemi_mac_set_mac_addr(struct net_device * dev,void * p)215 static int pasemi_mac_set_mac_addr(struct net_device *dev, void *p)
216 {
217 struct pasemi_mac *mac = netdev_priv(dev);
218 struct sockaddr *addr = p;
219 unsigned int adr0, adr1;
220
221 if (!is_valid_ether_addr(addr->sa_data))
222 return -EADDRNOTAVAIL;
223
224 eth_hw_addr_set(dev, addr->sa_data);
225
226 adr0 = dev->dev_addr[2] << 24 |
227 dev->dev_addr[3] << 16 |
228 dev->dev_addr[4] << 8 |
229 dev->dev_addr[5];
230 adr1 = read_mac_reg(mac, PAS_MAC_CFG_ADR1);
231 adr1 &= ~0xffff;
232 adr1 |= dev->dev_addr[0] << 8 | dev->dev_addr[1];
233
234 pasemi_mac_intf_disable(mac);
235 write_mac_reg(mac, PAS_MAC_CFG_ADR0, adr0);
236 write_mac_reg(mac, PAS_MAC_CFG_ADR1, adr1);
237 pasemi_mac_intf_enable(mac);
238
239 return 0;
240 }
241
pasemi_mac_unmap_tx_skb(struct pasemi_mac * mac,const int nfrags,struct sk_buff * skb,const dma_addr_t * dmas)242 static int pasemi_mac_unmap_tx_skb(struct pasemi_mac *mac,
243 const int nfrags,
244 struct sk_buff *skb,
245 const dma_addr_t *dmas)
246 {
247 int f;
248 struct pci_dev *pdev = mac->dma_pdev;
249
250 dma_unmap_single(&pdev->dev, dmas[0], skb_headlen(skb), DMA_TO_DEVICE);
251
252 for (f = 0; f < nfrags; f++) {
253 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
254
255 dma_unmap_page(&pdev->dev, dmas[f + 1], skb_frag_size(frag),
256 DMA_TO_DEVICE);
257 }
258 dev_kfree_skb_irq(skb);
259
260 /* Freed descriptor slot + main SKB ptr + nfrags additional ptrs,
261 * aligned up to a power of 2
262 */
263 return (nfrags + 3) & ~1;
264 }
265
pasemi_mac_setup_csring(struct pasemi_mac * mac)266 static struct pasemi_mac_csring *pasemi_mac_setup_csring(struct pasemi_mac *mac)
267 {
268 struct pasemi_mac_csring *ring;
269 u32 val;
270 unsigned int cfg;
271 int chno;
272
273 ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_csring),
274 offsetof(struct pasemi_mac_csring, chan));
275
276 if (!ring) {
277 dev_err(&mac->pdev->dev, "Can't allocate checksum channel\n");
278 goto out_chan;
279 }
280
281 chno = ring->chan.chno;
282
283 ring->size = CS_RING_SIZE;
284 ring->next_to_fill = 0;
285
286 /* Allocate descriptors */
287 if (pasemi_dma_alloc_ring(&ring->chan, CS_RING_SIZE))
288 goto out_ring_desc;
289
290 write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno),
291 PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma));
292 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32);
293 val |= PAS_DMA_TXCHAN_BASEU_SIZ(CS_RING_SIZE >> 3);
294
295 write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val);
296
297 ring->events[0] = pasemi_dma_alloc_flag();
298 ring->events[1] = pasemi_dma_alloc_flag();
299 if (ring->events[0] < 0 || ring->events[1] < 0)
300 goto out_flags;
301
302 pasemi_dma_clear_flag(ring->events[0]);
303 pasemi_dma_clear_flag(ring->events[1]);
304
305 ring->fun = pasemi_dma_alloc_fun();
306 if (ring->fun < 0)
307 goto out_fun;
308
309 cfg = PAS_DMA_TXCHAN_CFG_TY_FUNC | PAS_DMA_TXCHAN_CFG_UP |
310 PAS_DMA_TXCHAN_CFG_TATTR(ring->fun) |
311 PAS_DMA_TXCHAN_CFG_LPSQ | PAS_DMA_TXCHAN_CFG_LPDQ;
312
313 if (translation_enabled())
314 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
315
316 write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg);
317
318 /* enable channel */
319 pasemi_dma_start_chan(&ring->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ |
320 PAS_DMA_TXCHAN_TCMDSTA_DB |
321 PAS_DMA_TXCHAN_TCMDSTA_DE |
322 PAS_DMA_TXCHAN_TCMDSTA_DA);
323
324 return ring;
325
326 out_fun:
327 out_flags:
328 if (ring->events[0] >= 0)
329 pasemi_dma_free_flag(ring->events[0]);
330 if (ring->events[1] >= 0)
331 pasemi_dma_free_flag(ring->events[1]);
332 pasemi_dma_free_ring(&ring->chan);
333 out_ring_desc:
334 pasemi_dma_free_chan(&ring->chan);
335 out_chan:
336
337 return NULL;
338 }
339
pasemi_mac_setup_csrings(struct pasemi_mac * mac)340 static void pasemi_mac_setup_csrings(struct pasemi_mac *mac)
341 {
342 int i;
343 mac->cs[0] = pasemi_mac_setup_csring(mac);
344 if (mac->type == MAC_TYPE_XAUI)
345 mac->cs[1] = pasemi_mac_setup_csring(mac);
346 else
347 mac->cs[1] = 0;
348
349 for (i = 0; i < MAX_CS; i++)
350 if (mac->cs[i])
351 mac->num_cs++;
352 }
353
pasemi_mac_free_csring(struct pasemi_mac_csring * csring)354 static void pasemi_mac_free_csring(struct pasemi_mac_csring *csring)
355 {
356 pasemi_dma_stop_chan(&csring->chan);
357 pasemi_dma_free_flag(csring->events[0]);
358 pasemi_dma_free_flag(csring->events[1]);
359 pasemi_dma_free_ring(&csring->chan);
360 pasemi_dma_free_chan(&csring->chan);
361 pasemi_dma_free_fun(csring->fun);
362 }
363
pasemi_mac_setup_rx_resources(const struct net_device * dev)364 static int pasemi_mac_setup_rx_resources(const struct net_device *dev)
365 {
366 struct pasemi_mac_rxring *ring;
367 struct pasemi_mac *mac = netdev_priv(dev);
368 int chno;
369 unsigned int cfg;
370
371 ring = pasemi_dma_alloc_chan(RXCHAN, sizeof(struct pasemi_mac_rxring),
372 offsetof(struct pasemi_mac_rxring, chan));
373
374 if (!ring) {
375 dev_err(&mac->pdev->dev, "Can't allocate RX channel\n");
376 goto out_chan;
377 }
378 chno = ring->chan.chno;
379
380 spin_lock_init(&ring->lock);
381
382 ring->size = RX_RING_SIZE;
383 ring->ring_info = kcalloc(RX_RING_SIZE,
384 sizeof(struct pasemi_mac_buffer),
385 GFP_KERNEL);
386
387 if (!ring->ring_info)
388 goto out_ring_info;
389
390 /* Allocate descriptors */
391 if (pasemi_dma_alloc_ring(&ring->chan, RX_RING_SIZE))
392 goto out_ring_desc;
393
394 ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
395 RX_RING_SIZE * sizeof(u64),
396 &ring->buf_dma, GFP_KERNEL);
397 if (!ring->buffers)
398 goto out_ring_desc;
399
400 write_dma_reg(PAS_DMA_RXCHAN_BASEL(chno),
401 PAS_DMA_RXCHAN_BASEL_BRBL(ring->chan.ring_dma));
402
403 write_dma_reg(PAS_DMA_RXCHAN_BASEU(chno),
404 PAS_DMA_RXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32) |
405 PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3));
406
407 cfg = PAS_DMA_RXCHAN_CFG_HBU(2);
408
409 if (translation_enabled())
410 cfg |= PAS_DMA_RXCHAN_CFG_CTR;
411
412 write_dma_reg(PAS_DMA_RXCHAN_CFG(chno), cfg);
413
414 write_dma_reg(PAS_DMA_RXINT_BASEL(mac->dma_if),
415 PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma));
416
417 write_dma_reg(PAS_DMA_RXINT_BASEU(mac->dma_if),
418 PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) |
419 PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
420
421 cfg = PAS_DMA_RXINT_CFG_DHL(2) | PAS_DMA_RXINT_CFG_L2 |
422 PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP |
423 PAS_DMA_RXINT_CFG_HEN;
424
425 if (translation_enabled())
426 cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR;
427
428 write_dma_reg(PAS_DMA_RXINT_CFG(mac->dma_if), cfg);
429
430 ring->next_to_fill = 0;
431 ring->next_to_clean = 0;
432 ring->mac = mac;
433 mac->rx = ring;
434
435 return 0;
436
437 out_ring_desc:
438 kfree(ring->ring_info);
439 out_ring_info:
440 pasemi_dma_free_chan(&ring->chan);
441 out_chan:
442 return -ENOMEM;
443 }
444
445 static struct pasemi_mac_txring *
pasemi_mac_setup_tx_resources(const struct net_device * dev)446 pasemi_mac_setup_tx_resources(const struct net_device *dev)
447 {
448 struct pasemi_mac *mac = netdev_priv(dev);
449 u32 val;
450 struct pasemi_mac_txring *ring;
451 unsigned int cfg;
452 int chno;
453
454 ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_txring),
455 offsetof(struct pasemi_mac_txring, chan));
456
457 if (!ring) {
458 dev_err(&mac->pdev->dev, "Can't allocate TX channel\n");
459 goto out_chan;
460 }
461
462 chno = ring->chan.chno;
463
464 spin_lock_init(&ring->lock);
465
466 ring->size = TX_RING_SIZE;
467 ring->ring_info = kcalloc(TX_RING_SIZE,
468 sizeof(struct pasemi_mac_buffer),
469 GFP_KERNEL);
470 if (!ring->ring_info)
471 goto out_ring_info;
472
473 /* Allocate descriptors */
474 if (pasemi_dma_alloc_ring(&ring->chan, TX_RING_SIZE))
475 goto out_ring_desc;
476
477 write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno),
478 PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma));
479 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32);
480 val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3);
481
482 write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val);
483
484 cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE |
485 PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
486 PAS_DMA_TXCHAN_CFG_UP |
487 PAS_DMA_TXCHAN_CFG_WT(4);
488
489 if (translation_enabled())
490 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
491
492 write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg);
493
494 ring->next_to_fill = 0;
495 ring->next_to_clean = 0;
496 ring->mac = mac;
497
498 return ring;
499
500 out_ring_desc:
501 kfree(ring->ring_info);
502 out_ring_info:
503 pasemi_dma_free_chan(&ring->chan);
504 out_chan:
505 return NULL;
506 }
507
pasemi_mac_free_tx_resources(struct pasemi_mac * mac)508 static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac)
509 {
510 struct pasemi_mac_txring *txring = tx_ring(mac);
511 unsigned int i, j;
512 struct pasemi_mac_buffer *info;
513 dma_addr_t dmas[MAX_SKB_FRAGS+1];
514 int freed, nfrags;
515 int start, limit;
516
517 start = txring->next_to_clean;
518 limit = txring->next_to_fill;
519
520 /* Compensate for when fill has wrapped and clean has not */
521 if (start > limit)
522 limit += TX_RING_SIZE;
523
524 for (i = start; i < limit; i += freed) {
525 info = &txring->ring_info[(i+1) & (TX_RING_SIZE-1)];
526 if (info->dma && info->skb) {
527 nfrags = skb_shinfo(info->skb)->nr_frags;
528 for (j = 0; j <= nfrags; j++)
529 dmas[j] = txring->ring_info[(i+1+j) &
530 (TX_RING_SIZE-1)].dma;
531 freed = pasemi_mac_unmap_tx_skb(mac, nfrags,
532 info->skb, dmas);
533 } else {
534 freed = 2;
535 }
536 }
537
538 kfree(txring->ring_info);
539 pasemi_dma_free_chan(&txring->chan);
540
541 }
542
pasemi_mac_free_rx_buffers(struct pasemi_mac * mac)543 static void pasemi_mac_free_rx_buffers(struct pasemi_mac *mac)
544 {
545 struct pasemi_mac_rxring *rx = rx_ring(mac);
546 unsigned int i;
547 struct pasemi_mac_buffer *info;
548
549 for (i = 0; i < RX_RING_SIZE; i++) {
550 info = &RX_DESC_INFO(rx, i);
551 if (info->skb && info->dma) {
552 dma_unmap_single(&mac->dma_pdev->dev, info->dma,
553 info->skb->len, DMA_FROM_DEVICE);
554 dev_kfree_skb_any(info->skb);
555 }
556 info->dma = 0;
557 info->skb = NULL;
558 }
559
560 for (i = 0; i < RX_RING_SIZE; i++)
561 RX_BUFF(rx, i) = 0;
562 }
563
pasemi_mac_free_rx_resources(struct pasemi_mac * mac)564 static void pasemi_mac_free_rx_resources(struct pasemi_mac *mac)
565 {
566 pasemi_mac_free_rx_buffers(mac);
567
568 dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
569 rx_ring(mac)->buffers, rx_ring(mac)->buf_dma);
570
571 kfree(rx_ring(mac)->ring_info);
572 pasemi_dma_free_chan(&rx_ring(mac)->chan);
573 mac->rx = NULL;
574 }
575
pasemi_mac_replenish_rx_ring(struct net_device * dev,const int limit)576 static void pasemi_mac_replenish_rx_ring(struct net_device *dev,
577 const int limit)
578 {
579 const struct pasemi_mac *mac = netdev_priv(dev);
580 struct pasemi_mac_rxring *rx = rx_ring(mac);
581 int fill, count;
582
583 if (limit <= 0)
584 return;
585
586 fill = rx_ring(mac)->next_to_fill;
587 for (count = 0; count < limit; count++) {
588 struct pasemi_mac_buffer *info = &RX_DESC_INFO(rx, fill);
589 u64 *buff = &RX_BUFF(rx, fill);
590 struct sk_buff *skb;
591 dma_addr_t dma;
592
593 /* Entry in use? */
594 WARN_ON(*buff);
595
596 skb = netdev_alloc_skb(dev, mac->bufsz);
597 skb_reserve(skb, LOCAL_SKB_ALIGN);
598
599 if (unlikely(!skb))
600 break;
601
602 dma = dma_map_single(&mac->dma_pdev->dev, skb->data,
603 mac->bufsz - LOCAL_SKB_ALIGN,
604 DMA_FROM_DEVICE);
605
606 if (dma_mapping_error(&mac->dma_pdev->dev, dma)) {
607 dev_kfree_skb_irq(info->skb);
608 break;
609 }
610
611 info->skb = skb;
612 info->dma = dma;
613 *buff = XCT_RXB_LEN(mac->bufsz) | XCT_RXB_ADDR(dma);
614 fill++;
615 }
616
617 wmb();
618
619 write_dma_reg(PAS_DMA_RXINT_INCR(mac->dma_if), count);
620
621 rx_ring(mac)->next_to_fill = (rx_ring(mac)->next_to_fill + count) &
622 (RX_RING_SIZE - 1);
623 }
624
pasemi_mac_restart_rx_intr(const struct pasemi_mac * mac)625 static void pasemi_mac_restart_rx_intr(const struct pasemi_mac *mac)
626 {
627 struct pasemi_mac_rxring *rx = rx_ring(mac);
628 unsigned int reg, pcnt;
629 /* Re-enable packet count interrupts: finally
630 * ack the packet count interrupt we got in rx_intr.
631 */
632
633 pcnt = *rx->chan.status & PAS_STATUS_PCNT_M;
634
635 reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
636
637 if (*rx->chan.status & PAS_STATUS_TIMER)
638 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
639
640 write_iob_reg(PAS_IOB_DMA_RXCH_RESET(mac->rx->chan.chno), reg);
641 }
642
pasemi_mac_restart_tx_intr(const struct pasemi_mac * mac)643 static void pasemi_mac_restart_tx_intr(const struct pasemi_mac *mac)
644 {
645 unsigned int reg, pcnt;
646
647 /* Re-enable packet count interrupts */
648 pcnt = *tx_ring(mac)->chan.status & PAS_STATUS_PCNT_M;
649
650 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
651
652 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan.chno), reg);
653 }
654
655
pasemi_mac_rx_error(const struct pasemi_mac * mac,const u64 macrx)656 static inline void pasemi_mac_rx_error(const struct pasemi_mac *mac,
657 const u64 macrx)
658 {
659 unsigned int rcmdsta, ccmdsta;
660 struct pasemi_dmachan *chan = &rx_ring(mac)->chan;
661
662 if (!netif_msg_rx_err(mac))
663 return;
664
665 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
666 ccmdsta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(chan->chno));
667
668 printk(KERN_ERR "pasemi_mac: rx error. macrx %016llx, rx status %llx\n",
669 macrx, *chan->status);
670
671 printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
672 rcmdsta, ccmdsta);
673 }
674
pasemi_mac_tx_error(const struct pasemi_mac * mac,const u64 mactx)675 static inline void pasemi_mac_tx_error(const struct pasemi_mac *mac,
676 const u64 mactx)
677 {
678 unsigned int cmdsta;
679 struct pasemi_dmachan *chan = &tx_ring(mac)->chan;
680
681 if (!netif_msg_tx_err(mac))
682 return;
683
684 cmdsta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(chan->chno));
685
686 printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016llx, "\
687 "tx status 0x%016llx\n", mactx, *chan->status);
688
689 printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
690 }
691
pasemi_mac_clean_rx(struct pasemi_mac_rxring * rx,const int limit)692 static int pasemi_mac_clean_rx(struct pasemi_mac_rxring *rx,
693 const int limit)
694 {
695 const struct pasemi_dmachan *chan = &rx->chan;
696 struct pasemi_mac *mac = rx->mac;
697 struct pci_dev *pdev = mac->dma_pdev;
698 unsigned int n;
699 int count, buf_index, tot_bytes, packets;
700 struct pasemi_mac_buffer *info;
701 struct sk_buff *skb;
702 unsigned int len;
703 u64 macrx, eval;
704 dma_addr_t dma;
705
706 tot_bytes = 0;
707 packets = 0;
708
709 spin_lock(&rx->lock);
710
711 n = rx->next_to_clean;
712
713 prefetch(&RX_DESC(rx, n));
714
715 for (count = 0; count < limit; count++) {
716 macrx = RX_DESC(rx, n);
717 prefetch(&RX_DESC(rx, n+4));
718
719 if ((macrx & XCT_MACRX_E) ||
720 (*chan->status & PAS_STATUS_ERROR))
721 pasemi_mac_rx_error(mac, macrx);
722
723 if (!(macrx & XCT_MACRX_O))
724 break;
725
726 info = NULL;
727
728 BUG_ON(!(macrx & XCT_MACRX_RR_8BRES));
729
730 eval = (RX_DESC(rx, n+1) & XCT_RXRES_8B_EVAL_M) >>
731 XCT_RXRES_8B_EVAL_S;
732 buf_index = eval-1;
733
734 dma = (RX_DESC(rx, n+2) & XCT_PTR_ADDR_M);
735 info = &RX_DESC_INFO(rx, buf_index);
736
737 skb = info->skb;
738
739 prefetch_skb(skb);
740
741 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
742
743 dma_unmap_single(&pdev->dev, dma,
744 mac->bufsz - LOCAL_SKB_ALIGN,
745 DMA_FROM_DEVICE);
746
747 if (macrx & XCT_MACRX_CRC) {
748 /* CRC error flagged */
749 mac->netdev->stats.rx_errors++;
750 mac->netdev->stats.rx_crc_errors++;
751 /* No need to free skb, it'll be reused */
752 goto next;
753 }
754
755 info->skb = NULL;
756 info->dma = 0;
757
758 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
759 skb->ip_summed = CHECKSUM_UNNECESSARY;
760 skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
761 XCT_MACRX_CSUM_S;
762 } else {
763 skb_checksum_none_assert(skb);
764 }
765
766 packets++;
767 tot_bytes += len;
768
769 /* Don't include CRC */
770 skb_put(skb, len-4);
771
772 skb->protocol = eth_type_trans(skb, mac->netdev);
773 napi_gro_receive(&mac->napi, skb);
774
775 next:
776 RX_DESC(rx, n) = 0;
777 RX_DESC(rx, n+1) = 0;
778
779 /* Need to zero it out since hardware doesn't, since the
780 * replenish loop uses it to tell when it's done.
781 */
782 RX_BUFF(rx, buf_index) = 0;
783
784 n += 4;
785 }
786
787 if (n > RX_RING_SIZE) {
788 /* Errata 5971 workaround: L2 target of headers */
789 write_iob_reg(PAS_IOB_COM_PKTHDRCNT, 0);
790 n &= (RX_RING_SIZE-1);
791 }
792
793 rx_ring(mac)->next_to_clean = n;
794
795 /* Increase is in number of 16-byte entries, and since each descriptor
796 * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with
797 * count*2.
798 */
799 write_dma_reg(PAS_DMA_RXCHAN_INCR(mac->rx->chan.chno), count << 1);
800
801 pasemi_mac_replenish_rx_ring(mac->netdev, count);
802
803 mac->netdev->stats.rx_bytes += tot_bytes;
804 mac->netdev->stats.rx_packets += packets;
805
806 spin_unlock(&rx_ring(mac)->lock);
807
808 return count;
809 }
810
811 /* Can't make this too large or we blow the kernel stack limits */
812 #define TX_CLEAN_BATCHSIZE (128/MAX_SKB_FRAGS)
813
pasemi_mac_clean_tx(struct pasemi_mac_txring * txring)814 static int pasemi_mac_clean_tx(struct pasemi_mac_txring *txring)
815 {
816 struct pasemi_dmachan *chan = &txring->chan;
817 struct pasemi_mac *mac = txring->mac;
818 int i, j;
819 unsigned int start, descr_count, buf_count, batch_limit;
820 unsigned int ring_limit;
821 unsigned int total_count;
822 unsigned long flags;
823 struct sk_buff *skbs[TX_CLEAN_BATCHSIZE];
824 dma_addr_t dmas[TX_CLEAN_BATCHSIZE][MAX_SKB_FRAGS+1];
825 int nf[TX_CLEAN_BATCHSIZE];
826 int nr_frags;
827
828 total_count = 0;
829 batch_limit = TX_CLEAN_BATCHSIZE;
830 restart:
831 spin_lock_irqsave(&txring->lock, flags);
832
833 start = txring->next_to_clean;
834 ring_limit = txring->next_to_fill;
835
836 prefetch(&TX_DESC_INFO(txring, start+1).skb);
837
838 /* Compensate for when fill has wrapped but clean has not */
839 if (start > ring_limit)
840 ring_limit += TX_RING_SIZE;
841
842 buf_count = 0;
843 descr_count = 0;
844
845 for (i = start;
846 descr_count < batch_limit && i < ring_limit;
847 i += buf_count) {
848 u64 mactx = TX_DESC(txring, i);
849 struct sk_buff *skb;
850
851 if ((mactx & XCT_MACTX_E) ||
852 (*chan->status & PAS_STATUS_ERROR))
853 pasemi_mac_tx_error(mac, mactx);
854
855 /* Skip over control descriptors */
856 if (!(mactx & XCT_MACTX_LLEN_M)) {
857 TX_DESC(txring, i) = 0;
858 TX_DESC(txring, i+1) = 0;
859 buf_count = 2;
860 continue;
861 }
862
863 skb = TX_DESC_INFO(txring, i+1).skb;
864 nr_frags = TX_DESC_INFO(txring, i).dma;
865
866 if (unlikely(mactx & XCT_MACTX_O))
867 /* Not yet transmitted */
868 break;
869
870 buf_count = 2 + nr_frags;
871 /* Since we always fill with an even number of entries, make
872 * sure we skip any unused one at the end as well.
873 */
874 if (buf_count & 1)
875 buf_count++;
876
877 for (j = 0; j <= nr_frags; j++)
878 dmas[descr_count][j] = TX_DESC_INFO(txring, i+1+j).dma;
879
880 skbs[descr_count] = skb;
881 nf[descr_count] = nr_frags;
882
883 TX_DESC(txring, i) = 0;
884 TX_DESC(txring, i+1) = 0;
885
886 descr_count++;
887 }
888 txring->next_to_clean = i & (TX_RING_SIZE-1);
889
890 spin_unlock_irqrestore(&txring->lock, flags);
891 netif_wake_queue(mac->netdev);
892
893 for (i = 0; i < descr_count; i++)
894 pasemi_mac_unmap_tx_skb(mac, nf[i], skbs[i], dmas[i]);
895
896 total_count += descr_count;
897
898 /* If the batch was full, try to clean more */
899 if (descr_count == batch_limit)
900 goto restart;
901
902 return total_count;
903 }
904
905
pasemi_mac_rx_intr(int irq,void * data)906 static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
907 {
908 const struct pasemi_mac_rxring *rxring = data;
909 struct pasemi_mac *mac = rxring->mac;
910 const struct pasemi_dmachan *chan = &rxring->chan;
911 unsigned int reg;
912
913 if (!(*chan->status & PAS_STATUS_CAUSE_M))
914 return IRQ_NONE;
915
916 /* Don't reset packet count so it won't fire again but clear
917 * all others.
918 */
919
920 reg = 0;
921 if (*chan->status & PAS_STATUS_SOFT)
922 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
923 if (*chan->status & PAS_STATUS_ERROR)
924 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
925
926 napi_schedule(&mac->napi);
927
928 write_iob_reg(PAS_IOB_DMA_RXCH_RESET(chan->chno), reg);
929
930 return IRQ_HANDLED;
931 }
932
933 #define TX_CLEAN_INTERVAL HZ
934
pasemi_mac_tx_timer(struct timer_list * t)935 static void pasemi_mac_tx_timer(struct timer_list *t)
936 {
937 struct pasemi_mac_txring *txring = timer_container_of(txring, t,
938 clean_timer);
939 struct pasemi_mac *mac = txring->mac;
940
941 pasemi_mac_clean_tx(txring);
942
943 mod_timer(&txring->clean_timer, jiffies + TX_CLEAN_INTERVAL);
944
945 pasemi_mac_restart_tx_intr(mac);
946 }
947
pasemi_mac_tx_intr(int irq,void * data)948 static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
949 {
950 struct pasemi_mac_txring *txring = data;
951 const struct pasemi_dmachan *chan = &txring->chan;
952 struct pasemi_mac *mac = txring->mac;
953 unsigned int reg;
954
955 if (!(*chan->status & PAS_STATUS_CAUSE_M))
956 return IRQ_NONE;
957
958 reg = 0;
959
960 if (*chan->status & PAS_STATUS_SOFT)
961 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
962 if (*chan->status & PAS_STATUS_ERROR)
963 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
964
965 mod_timer(&txring->clean_timer, jiffies + (TX_CLEAN_INTERVAL)*2);
966
967 napi_schedule(&mac->napi);
968
969 if (reg)
970 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg);
971
972 return IRQ_HANDLED;
973 }
974
pasemi_adjust_link(struct net_device * dev)975 static void pasemi_adjust_link(struct net_device *dev)
976 {
977 struct pasemi_mac *mac = netdev_priv(dev);
978 int msg;
979 unsigned int flags;
980 unsigned int new_flags;
981
982 if (!dev->phydev->link) {
983 /* If no link, MAC speed settings don't matter. Just report
984 * link down and return.
985 */
986 if (mac->link && netif_msg_link(mac))
987 printk(KERN_INFO "%s: Link is down.\n", dev->name);
988
989 netif_carrier_off(dev);
990 pasemi_mac_intf_disable(mac);
991 mac->link = 0;
992
993 return;
994 } else {
995 pasemi_mac_intf_enable(mac);
996 netif_carrier_on(dev);
997 }
998
999 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1000 new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
1001 PAS_MAC_CFG_PCFG_TSR_M);
1002
1003 if (!dev->phydev->duplex)
1004 new_flags |= PAS_MAC_CFG_PCFG_HD;
1005
1006 switch (dev->phydev->speed) {
1007 case 1000:
1008 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
1009 PAS_MAC_CFG_PCFG_TSR_1G;
1010 break;
1011 case 100:
1012 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
1013 PAS_MAC_CFG_PCFG_TSR_100M;
1014 break;
1015 case 10:
1016 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
1017 PAS_MAC_CFG_PCFG_TSR_10M;
1018 break;
1019 default:
1020 printk("Unsupported speed %d\n", dev->phydev->speed);
1021 }
1022
1023 /* Print on link or speed/duplex change */
1024 msg = mac->link != dev->phydev->link || flags != new_flags;
1025
1026 mac->duplex = dev->phydev->duplex;
1027 mac->speed = dev->phydev->speed;
1028 mac->link = dev->phydev->link;
1029
1030 if (new_flags != flags)
1031 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
1032
1033 if (msg && netif_msg_link(mac))
1034 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
1035 dev->name, mac->speed, mac->duplex ? "full" : "half");
1036 }
1037
pasemi_mac_phy_init(struct net_device * dev)1038 static int pasemi_mac_phy_init(struct net_device *dev)
1039 {
1040 struct pasemi_mac *mac = netdev_priv(dev);
1041 struct device_node *dn, *phy_dn;
1042 struct phy_device *phydev;
1043
1044 dn = pci_device_to_OF_node(mac->pdev);
1045 phy_dn = of_parse_phandle(dn, "phy-handle", 0);
1046
1047 mac->link = 0;
1048 mac->speed = 0;
1049 mac->duplex = -1;
1050
1051 phydev = of_phy_connect(dev, phy_dn, &pasemi_adjust_link, 0,
1052 PHY_INTERFACE_MODE_SGMII);
1053
1054 of_node_put(phy_dn);
1055 if (!phydev) {
1056 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
1057 return -ENODEV;
1058 }
1059
1060 return 0;
1061 }
1062
1063
pasemi_mac_open(struct net_device * dev)1064 static int pasemi_mac_open(struct net_device *dev)
1065 {
1066 struct pasemi_mac *mac = netdev_priv(dev);
1067 unsigned int flags;
1068 int i, ret;
1069
1070 flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
1071 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
1072 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
1073
1074 write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
1075
1076 ret = pasemi_mac_setup_rx_resources(dev);
1077 if (ret)
1078 goto out_rx_resources;
1079
1080 mac->tx = pasemi_mac_setup_tx_resources(dev);
1081
1082 if (!mac->tx) {
1083 ret = -ENOMEM;
1084 goto out_tx_ring;
1085 }
1086
1087 /* We might already have allocated rings in case mtu was changed
1088 * before interface was brought up.
1089 */
1090 if (dev->mtu > 1500 && !mac->num_cs) {
1091 pasemi_mac_setup_csrings(mac);
1092 if (!mac->num_cs) {
1093 ret = -ENOMEM;
1094 goto out_tx_ring;
1095 }
1096 }
1097
1098 /* Zero out rmon counters */
1099 for (i = 0; i < 32; i++)
1100 write_mac_reg(mac, PAS_MAC_RMON(i), 0);
1101
1102 /* 0x3ff with 33MHz clock is about 31us */
1103 write_iob_reg(PAS_IOB_DMA_COM_TIMEOUTCFG,
1104 PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0x3ff));
1105
1106 write_iob_reg(PAS_IOB_DMA_RXCH_CFG(mac->rx->chan.chno),
1107 PAS_IOB_DMA_RXCH_CFG_CNTTH(256));
1108
1109 write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno),
1110 PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
1111
1112 write_mac_reg(mac, PAS_MAC_IPC_CHNL,
1113 PAS_MAC_IPC_CHNL_DCHNO(mac->rx->chan.chno) |
1114 PAS_MAC_IPC_CHNL_BCH(mac->rx->chan.chno));
1115
1116 /* enable rx if */
1117 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1118 PAS_DMA_RXINT_RCMDSTA_EN |
1119 PAS_DMA_RXINT_RCMDSTA_DROPS_M |
1120 PAS_DMA_RXINT_RCMDSTA_BP |
1121 PAS_DMA_RXINT_RCMDSTA_OO |
1122 PAS_DMA_RXINT_RCMDSTA_BT);
1123
1124 /* enable rx channel */
1125 pasemi_dma_start_chan(&rx_ring(mac)->chan, PAS_DMA_RXCHAN_CCMDSTA_DU |
1126 PAS_DMA_RXCHAN_CCMDSTA_OD |
1127 PAS_DMA_RXCHAN_CCMDSTA_FD |
1128 PAS_DMA_RXCHAN_CCMDSTA_DT);
1129
1130 /* enable tx channel */
1131 pasemi_dma_start_chan(&tx_ring(mac)->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ |
1132 PAS_DMA_TXCHAN_TCMDSTA_DB |
1133 PAS_DMA_TXCHAN_TCMDSTA_DE |
1134 PAS_DMA_TXCHAN_TCMDSTA_DA);
1135
1136 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
1137
1138 write_dma_reg(PAS_DMA_RXCHAN_INCR(rx_ring(mac)->chan.chno),
1139 RX_RING_SIZE>>1);
1140
1141 /* Clear out any residual packet count state from firmware */
1142 pasemi_mac_restart_rx_intr(mac);
1143 pasemi_mac_restart_tx_intr(mac);
1144
1145 flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
1146
1147 if (mac->type == MAC_TYPE_GMAC)
1148 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
1149 else
1150 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
1151
1152 /* Enable interface in MAC */
1153 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1154
1155 ret = pasemi_mac_phy_init(dev);
1156 if (ret) {
1157 /* Since we won't get link notification, just enable RX */
1158 pasemi_mac_intf_enable(mac);
1159 if (mac->type == MAC_TYPE_GMAC) {
1160 /* Warn for missing PHY on SGMII (1Gig) ports */
1161 dev_warn(&mac->pdev->dev,
1162 "PHY init failed: %d.\n", ret);
1163 dev_warn(&mac->pdev->dev,
1164 "Defaulting to 1Gbit full duplex\n");
1165 }
1166 }
1167
1168 netif_start_queue(dev);
1169 napi_enable(&mac->napi);
1170
1171 snprintf(mac->tx_irq_name, sizeof(mac->tx_irq_name), "%s tx",
1172 dev->name);
1173
1174 ret = request_irq(mac->tx->chan.irq, pasemi_mac_tx_intr, 0,
1175 mac->tx_irq_name, mac->tx);
1176 if (ret) {
1177 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
1178 mac->tx->chan.irq, ret);
1179 goto out_tx_int;
1180 }
1181
1182 snprintf(mac->rx_irq_name, sizeof(mac->rx_irq_name), "%s rx",
1183 dev->name);
1184
1185 ret = request_irq(mac->rx->chan.irq, pasemi_mac_rx_intr, 0,
1186 mac->rx_irq_name, mac->rx);
1187 if (ret) {
1188 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
1189 mac->rx->chan.irq, ret);
1190 goto out_rx_int;
1191 }
1192
1193 if (dev->phydev)
1194 phy_start(dev->phydev);
1195
1196 timer_setup(&mac->tx->clean_timer, pasemi_mac_tx_timer, 0);
1197 mod_timer(&mac->tx->clean_timer, jiffies + HZ);
1198
1199 return 0;
1200
1201 out_rx_int:
1202 free_irq(mac->tx->chan.irq, mac->tx);
1203 out_tx_int:
1204 napi_disable(&mac->napi);
1205 netif_stop_queue(dev);
1206 out_tx_ring:
1207 if (mac->tx)
1208 pasemi_mac_free_tx_resources(mac);
1209 pasemi_mac_free_rx_resources(mac);
1210 out_rx_resources:
1211
1212 return ret;
1213 }
1214
1215 #define MAX_RETRIES 5000
1216
pasemi_mac_pause_txchan(struct pasemi_mac * mac)1217 static void pasemi_mac_pause_txchan(struct pasemi_mac *mac)
1218 {
1219 unsigned int sta, retries;
1220 int txch = tx_ring(mac)->chan.chno;
1221
1222 write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch),
1223 PAS_DMA_TXCHAN_TCMDSTA_ST);
1224
1225 for (retries = 0; retries < MAX_RETRIES; retries++) {
1226 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch));
1227 if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT))
1228 break;
1229 cond_resched();
1230 }
1231
1232 if (sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)
1233 dev_err(&mac->dma_pdev->dev,
1234 "Failed to stop tx channel, tcmdsta %08x\n", sta);
1235
1236 write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), 0);
1237 }
1238
pasemi_mac_pause_rxchan(struct pasemi_mac * mac)1239 static void pasemi_mac_pause_rxchan(struct pasemi_mac *mac)
1240 {
1241 unsigned int sta, retries;
1242 int rxch = rx_ring(mac)->chan.chno;
1243
1244 write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch),
1245 PAS_DMA_RXCHAN_CCMDSTA_ST);
1246 for (retries = 0; retries < MAX_RETRIES; retries++) {
1247 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch));
1248 if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT))
1249 break;
1250 cond_resched();
1251 }
1252
1253 if (sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)
1254 dev_err(&mac->dma_pdev->dev,
1255 "Failed to stop rx channel, ccmdsta 08%x\n", sta);
1256 write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), 0);
1257 }
1258
pasemi_mac_pause_rxint(struct pasemi_mac * mac)1259 static void pasemi_mac_pause_rxint(struct pasemi_mac *mac)
1260 {
1261 unsigned int sta, retries;
1262
1263 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1264 PAS_DMA_RXINT_RCMDSTA_ST);
1265 for (retries = 0; retries < MAX_RETRIES; retries++) {
1266 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1267 if (!(sta & PAS_DMA_RXINT_RCMDSTA_ACT))
1268 break;
1269 cond_resched();
1270 }
1271
1272 if (sta & PAS_DMA_RXINT_RCMDSTA_ACT)
1273 dev_err(&mac->dma_pdev->dev,
1274 "Failed to stop rx interface, rcmdsta %08x\n", sta);
1275 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
1276 }
1277
pasemi_mac_close(struct net_device * dev)1278 static int pasemi_mac_close(struct net_device *dev)
1279 {
1280 struct pasemi_mac *mac = netdev_priv(dev);
1281 unsigned int sta;
1282 int rxch, txch, i;
1283
1284 rxch = rx_ring(mac)->chan.chno;
1285 txch = tx_ring(mac)->chan.chno;
1286
1287 if (dev->phydev) {
1288 phy_stop(dev->phydev);
1289 phy_disconnect(dev->phydev);
1290 }
1291
1292 timer_delete_sync(&mac->tx->clean_timer);
1293
1294 netif_stop_queue(dev);
1295 napi_disable(&mac->napi);
1296
1297 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1298 if (sta & (PAS_DMA_RXINT_RCMDSTA_BP |
1299 PAS_DMA_RXINT_RCMDSTA_OO |
1300 PAS_DMA_RXINT_RCMDSTA_BT))
1301 printk(KERN_DEBUG "pasemi_mac: rcmdsta error: 0x%08x\n", sta);
1302
1303 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch));
1304 if (sta & (PAS_DMA_RXCHAN_CCMDSTA_DU |
1305 PAS_DMA_RXCHAN_CCMDSTA_OD |
1306 PAS_DMA_RXCHAN_CCMDSTA_FD |
1307 PAS_DMA_RXCHAN_CCMDSTA_DT))
1308 printk(KERN_DEBUG "pasemi_mac: ccmdsta error: 0x%08x\n", sta);
1309
1310 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch));
1311 if (sta & (PAS_DMA_TXCHAN_TCMDSTA_SZ | PAS_DMA_TXCHAN_TCMDSTA_DB |
1312 PAS_DMA_TXCHAN_TCMDSTA_DE | PAS_DMA_TXCHAN_TCMDSTA_DA))
1313 printk(KERN_DEBUG "pasemi_mac: tcmdsta error: 0x%08x\n", sta);
1314
1315 /* Clean out any pending buffers */
1316 pasemi_mac_clean_tx(tx_ring(mac));
1317 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
1318
1319 pasemi_mac_pause_txchan(mac);
1320 pasemi_mac_pause_rxint(mac);
1321 pasemi_mac_pause_rxchan(mac);
1322 pasemi_mac_intf_disable(mac);
1323
1324 free_irq(mac->tx->chan.irq, mac->tx);
1325 free_irq(mac->rx->chan.irq, mac->rx);
1326
1327 for (i = 0; i < mac->num_cs; i++) {
1328 pasemi_mac_free_csring(mac->cs[i]);
1329 mac->cs[i] = NULL;
1330 }
1331
1332 mac->num_cs = 0;
1333
1334 /* Free resources */
1335 pasemi_mac_free_rx_resources(mac);
1336 pasemi_mac_free_tx_resources(mac);
1337
1338 return 0;
1339 }
1340
pasemi_mac_queue_csdesc(const struct sk_buff * skb,const dma_addr_t * map,const unsigned int * map_size,struct pasemi_mac_txring * txring,struct pasemi_mac_csring * csring)1341 static void pasemi_mac_queue_csdesc(const struct sk_buff *skb,
1342 const dma_addr_t *map,
1343 const unsigned int *map_size,
1344 struct pasemi_mac_txring *txring,
1345 struct pasemi_mac_csring *csring)
1346 {
1347 u64 fund;
1348 dma_addr_t cs_dest;
1349 const int nh_off = skb_network_offset(skb);
1350 const int nh_len = skb_network_header_len(skb);
1351 const int nfrags = skb_shinfo(skb)->nr_frags;
1352 int cs_size, i, fill, hdr, evt;
1353 dma_addr_t csdma;
1354
1355 fund = XCT_FUN_ST | XCT_FUN_RR_8BRES |
1356 XCT_FUN_O | XCT_FUN_FUN(csring->fun) |
1357 XCT_FUN_CRM_SIG | XCT_FUN_LLEN(skb->len - nh_off) |
1358 XCT_FUN_SHL(nh_len >> 2) | XCT_FUN_SE;
1359
1360 switch (ip_hdr(skb)->protocol) {
1361 case IPPROTO_TCP:
1362 fund |= XCT_FUN_SIG_TCP4;
1363 /* TCP checksum is 16 bytes into the header */
1364 cs_dest = map[0] + skb_transport_offset(skb) + 16;
1365 break;
1366 case IPPROTO_UDP:
1367 fund |= XCT_FUN_SIG_UDP4;
1368 /* UDP checksum is 6 bytes into the header */
1369 cs_dest = map[0] + skb_transport_offset(skb) + 6;
1370 break;
1371 default:
1372 BUG();
1373 }
1374
1375 /* Do the checksum offloaded */
1376 fill = csring->next_to_fill;
1377 hdr = fill;
1378
1379 CS_DESC(csring, fill++) = fund;
1380 /* Room for 8BRES. Checksum result is really 2 bytes into it */
1381 csdma = csring->chan.ring_dma + (fill & (CS_RING_SIZE-1)) * 8 + 2;
1382 CS_DESC(csring, fill++) = 0;
1383
1384 CS_DESC(csring, fill) = XCT_PTR_LEN(map_size[0]-nh_off) | XCT_PTR_ADDR(map[0]+nh_off);
1385 for (i = 1; i <= nfrags; i++)
1386 CS_DESC(csring, fill+i) = XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
1387
1388 fill += i;
1389 if (fill & 1)
1390 fill++;
1391
1392 /* Copy the result into the TCP packet */
1393 CS_DESC(csring, fill++) = XCT_FUN_O | XCT_FUN_FUN(csring->fun) |
1394 XCT_FUN_LLEN(2) | XCT_FUN_SE;
1395 CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(cs_dest) | XCT_PTR_T;
1396 CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(csdma);
1397 fill++;
1398
1399 evt = !csring->last_event;
1400 csring->last_event = evt;
1401
1402 /* Event handshaking with MAC TX */
1403 CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1404 CTRL_CMD_ETYPE_SET | CTRL_CMD_REG(csring->events[evt]);
1405 CS_DESC(csring, fill++) = 0;
1406 CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1407 CTRL_CMD_ETYPE_WCLR | CTRL_CMD_REG(csring->events[!evt]);
1408 CS_DESC(csring, fill++) = 0;
1409 csring->next_to_fill = fill & (CS_RING_SIZE-1);
1410
1411 cs_size = fill - hdr;
1412 write_dma_reg(PAS_DMA_TXCHAN_INCR(csring->chan.chno), (cs_size) >> 1);
1413
1414 /* TX-side event handshaking */
1415 fill = txring->next_to_fill;
1416 TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1417 CTRL_CMD_ETYPE_WSET | CTRL_CMD_REG(csring->events[evt]);
1418 TX_DESC(txring, fill++) = 0;
1419 TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1420 CTRL_CMD_ETYPE_CLR | CTRL_CMD_REG(csring->events[!evt]);
1421 TX_DESC(txring, fill++) = 0;
1422 txring->next_to_fill = fill;
1423
1424 write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), 2);
1425 }
1426
pasemi_mac_start_tx(struct sk_buff * skb,struct net_device * dev)1427 static netdev_tx_t pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
1428 {
1429 struct pasemi_mac * const mac = netdev_priv(dev);
1430 struct pasemi_mac_txring * const txring = tx_ring(mac);
1431 struct pasemi_mac_csring *csring;
1432 u64 dflags = 0;
1433 u64 mactx;
1434 dma_addr_t map[MAX_SKB_FRAGS+1];
1435 unsigned int map_size[MAX_SKB_FRAGS+1];
1436 unsigned long flags;
1437 int i, nfrags;
1438 int fill;
1439 const int nh_off = skb_network_offset(skb);
1440 const int nh_len = skb_network_header_len(skb);
1441
1442 prefetch(&txring->ring_info);
1443
1444 dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_CRC_PAD;
1445
1446 nfrags = skb_shinfo(skb)->nr_frags;
1447
1448 map[0] = dma_map_single(&mac->dma_pdev->dev, skb->data,
1449 skb_headlen(skb), DMA_TO_DEVICE);
1450 map_size[0] = skb_headlen(skb);
1451 if (dma_mapping_error(&mac->dma_pdev->dev, map[0]))
1452 goto out_err_nolock;
1453
1454 for (i = 0; i < nfrags; i++) {
1455 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1456
1457 map[i + 1] = skb_frag_dma_map(&mac->dma_pdev->dev, frag, 0,
1458 skb_frag_size(frag), DMA_TO_DEVICE);
1459 map_size[i+1] = skb_frag_size(frag);
1460 if (dma_mapping_error(&mac->dma_pdev->dev, map[i + 1])) {
1461 nfrags = i;
1462 goto out_err_nolock;
1463 }
1464 }
1465
1466 if (skb->ip_summed == CHECKSUM_PARTIAL && skb->len <= 1540) {
1467 switch (ip_hdr(skb)->protocol) {
1468 case IPPROTO_TCP:
1469 dflags |= XCT_MACTX_CSUM_TCP;
1470 dflags |= XCT_MACTX_IPH(nh_len >> 2);
1471 dflags |= XCT_MACTX_IPO(nh_off);
1472 break;
1473 case IPPROTO_UDP:
1474 dflags |= XCT_MACTX_CSUM_UDP;
1475 dflags |= XCT_MACTX_IPH(nh_len >> 2);
1476 dflags |= XCT_MACTX_IPO(nh_off);
1477 break;
1478 default:
1479 WARN_ON(1);
1480 }
1481 }
1482
1483 mactx = dflags | XCT_MACTX_LLEN(skb->len);
1484
1485 spin_lock_irqsave(&txring->lock, flags);
1486
1487 /* Avoid stepping on the same cache line that the DMA controller
1488 * is currently about to send, so leave at least 8 words available.
1489 * Total free space needed is mactx + fragments + 8
1490 */
1491 if (RING_AVAIL(txring) < nfrags + 14) {
1492 /* no room -- stop the queue and wait for tx intr */
1493 netif_stop_queue(dev);
1494 goto out_err;
1495 }
1496
1497 /* Queue up checksum + event descriptors, if needed */
1498 if (mac->num_cs && skb->ip_summed == CHECKSUM_PARTIAL && skb->len > 1540) {
1499 csring = mac->cs[mac->last_cs];
1500 mac->last_cs = (mac->last_cs + 1) % mac->num_cs;
1501
1502 pasemi_mac_queue_csdesc(skb, map, map_size, txring, csring);
1503 }
1504
1505 fill = txring->next_to_fill;
1506 TX_DESC(txring, fill) = mactx;
1507 TX_DESC_INFO(txring, fill).dma = nfrags;
1508 fill++;
1509 TX_DESC_INFO(txring, fill).skb = skb;
1510 for (i = 0; i <= nfrags; i++) {
1511 TX_DESC(txring, fill+i) =
1512 XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
1513 TX_DESC_INFO(txring, fill+i).dma = map[i];
1514 }
1515
1516 /* We have to add an even number of 8-byte entries to the ring
1517 * even if the last one is unused. That means always an odd number
1518 * of pointers + one mactx descriptor.
1519 */
1520 if (nfrags & 1)
1521 nfrags++;
1522
1523 txring->next_to_fill = (fill + nfrags + 1) & (TX_RING_SIZE-1);
1524
1525 dev->stats.tx_packets++;
1526 dev->stats.tx_bytes += skb->len;
1527
1528 spin_unlock_irqrestore(&txring->lock, flags);
1529
1530 write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), (nfrags+2) >> 1);
1531
1532 return NETDEV_TX_OK;
1533
1534 out_err:
1535 spin_unlock_irqrestore(&txring->lock, flags);
1536 out_err_nolock:
1537 while (nfrags--)
1538 dma_unmap_single(&mac->dma_pdev->dev, map[nfrags],
1539 map_size[nfrags], DMA_TO_DEVICE);
1540
1541 return NETDEV_TX_BUSY;
1542 }
1543
pasemi_mac_set_rx_mode(struct net_device * dev)1544 static void pasemi_mac_set_rx_mode(struct net_device *dev)
1545 {
1546 const struct pasemi_mac *mac = netdev_priv(dev);
1547 unsigned int flags;
1548
1549 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
1550
1551 /* Set promiscuous */
1552 if (dev->flags & IFF_PROMISC)
1553 flags |= PAS_MAC_CFG_PCFG_PR;
1554 else
1555 flags &= ~PAS_MAC_CFG_PCFG_PR;
1556
1557 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1558 }
1559
1560
pasemi_mac_poll(struct napi_struct * napi,int budget)1561 static int pasemi_mac_poll(struct napi_struct *napi, int budget)
1562 {
1563 struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1564 int pkts;
1565
1566 pasemi_mac_clean_tx(tx_ring(mac));
1567 pkts = pasemi_mac_clean_rx(rx_ring(mac), budget);
1568 if (pkts < budget) {
1569 /* all done, no more packets present */
1570 napi_complete_done(napi, pkts);
1571
1572 pasemi_mac_restart_rx_intr(mac);
1573 pasemi_mac_restart_tx_intr(mac);
1574 }
1575 return pkts;
1576 }
1577
1578 #ifdef CONFIG_NET_POLL_CONTROLLER
1579 /*
1580 * Polling 'interrupt' - used by things like netconsole to send skbs
1581 * without having to re-enable interrupts. It's not called while
1582 * the interrupt routine is executing.
1583 */
pasemi_mac_netpoll(struct net_device * dev)1584 static void pasemi_mac_netpoll(struct net_device *dev)
1585 {
1586 const struct pasemi_mac *mac = netdev_priv(dev);
1587
1588 disable_irq(mac->tx->chan.irq);
1589 pasemi_mac_tx_intr(mac->tx->chan.irq, mac->tx);
1590 enable_irq(mac->tx->chan.irq);
1591
1592 disable_irq(mac->rx->chan.irq);
1593 pasemi_mac_rx_intr(mac->rx->chan.irq, mac->rx);
1594 enable_irq(mac->rx->chan.irq);
1595 }
1596 #endif
1597
pasemi_mac_change_mtu(struct net_device * dev,int new_mtu)1598 static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu)
1599 {
1600 struct pasemi_mac *mac = netdev_priv(dev);
1601 unsigned int reg;
1602 unsigned int rcmdsta = 0;
1603 int running;
1604 int ret = 0;
1605
1606 running = netif_running(dev);
1607
1608 if (running) {
1609 /* Need to stop the interface, clean out all already
1610 * received buffers, free all unused buffers on the RX
1611 * interface ring, then finally re-fill the rx ring with
1612 * the new-size buffers and restart.
1613 */
1614
1615 napi_disable(&mac->napi);
1616 netif_tx_disable(dev);
1617 pasemi_mac_intf_disable(mac);
1618
1619 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1620 pasemi_mac_pause_rxint(mac);
1621 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
1622 pasemi_mac_free_rx_buffers(mac);
1623
1624 }
1625
1626 /* Setup checksum channels if large MTU and none already allocated */
1627 if (new_mtu > PE_DEF_MTU && !mac->num_cs) {
1628 pasemi_mac_setup_csrings(mac);
1629 if (!mac->num_cs) {
1630 ret = -ENOMEM;
1631 goto out;
1632 }
1633 }
1634
1635 /* Change maxf, i.e. what size frames are accepted.
1636 * Need room for ethernet header and CRC word
1637 */
1638 reg = read_mac_reg(mac, PAS_MAC_CFG_MACCFG);
1639 reg &= ~PAS_MAC_CFG_MACCFG_MAXF_M;
1640 reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4);
1641 write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg);
1642
1643 WRITE_ONCE(dev->mtu, new_mtu);
1644 /* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
1645 mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
1646
1647 out:
1648 if (running) {
1649 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1650 rcmdsta | PAS_DMA_RXINT_RCMDSTA_EN);
1651
1652 rx_ring(mac)->next_to_fill = 0;
1653 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE-1);
1654
1655 napi_enable(&mac->napi);
1656 netif_start_queue(dev);
1657 pasemi_mac_intf_enable(mac);
1658 }
1659
1660 return ret;
1661 }
1662
1663 static const struct net_device_ops pasemi_netdev_ops = {
1664 .ndo_open = pasemi_mac_open,
1665 .ndo_stop = pasemi_mac_close,
1666 .ndo_start_xmit = pasemi_mac_start_tx,
1667 .ndo_set_rx_mode = pasemi_mac_set_rx_mode,
1668 .ndo_set_mac_address = pasemi_mac_set_mac_addr,
1669 .ndo_change_mtu = pasemi_mac_change_mtu,
1670 .ndo_validate_addr = eth_validate_addr,
1671 #ifdef CONFIG_NET_POLL_CONTROLLER
1672 .ndo_poll_controller = pasemi_mac_netpoll,
1673 #endif
1674 };
1675
1676 static int
pasemi_mac_probe(struct pci_dev * pdev,const struct pci_device_id * ent)1677 pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1678 {
1679 struct net_device *dev;
1680 struct pasemi_mac *mac;
1681 int err, ret;
1682
1683 err = pci_enable_device(pdev);
1684 if (err)
1685 return err;
1686
1687 dev = alloc_etherdev(sizeof(struct pasemi_mac));
1688 if (dev == NULL) {
1689 err = -ENOMEM;
1690 goto out_disable_device;
1691 }
1692
1693 pci_set_drvdata(pdev, dev);
1694 SET_NETDEV_DEV(dev, &pdev->dev);
1695
1696 mac = netdev_priv(dev);
1697
1698 mac->pdev = pdev;
1699 mac->netdev = dev;
1700
1701 netif_napi_add(dev, &mac->napi, pasemi_mac_poll);
1702
1703 dev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
1704 NETIF_F_GSO;
1705 dev->lltx = true;
1706
1707 mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1708 if (!mac->dma_pdev) {
1709 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1710 err = -ENODEV;
1711 goto out;
1712 }
1713 dma_set_mask(&mac->dma_pdev->dev, DMA_BIT_MASK(64));
1714
1715 mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1716 if (!mac->iob_pdev) {
1717 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1718 err = -ENODEV;
1719 goto out;
1720 }
1721
1722 /* get mac addr from device tree */
1723 if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1724 err = -ENODEV;
1725 goto out;
1726 }
1727 eth_hw_addr_set(dev, mac->mac_addr);
1728
1729 ret = mac_to_intf(mac);
1730 if (ret < 0) {
1731 dev_err(&mac->pdev->dev, "Can't map DMA interface\n");
1732 err = -ENODEV;
1733 goto out;
1734 }
1735 mac->dma_if = ret;
1736
1737 switch (pdev->device) {
1738 case 0xa005:
1739 mac->type = MAC_TYPE_GMAC;
1740 break;
1741 case 0xa006:
1742 mac->type = MAC_TYPE_XAUI;
1743 break;
1744 default:
1745 err = -ENODEV;
1746 goto out;
1747 }
1748
1749 dev->netdev_ops = &pasemi_netdev_ops;
1750 dev->mtu = PE_DEF_MTU;
1751
1752 /* MTU range: 64 - 9000 */
1753 dev->min_mtu = PE_MIN_MTU;
1754 dev->max_mtu = PE_MAX_MTU;
1755
1756 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
1757 mac->bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
1758
1759 dev->ethtool_ops = &pasemi_mac_ethtool_ops;
1760
1761 if (err)
1762 goto out;
1763
1764 mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1765
1766 /* Enable most messages by default */
1767 mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1768
1769 err = register_netdev(dev);
1770
1771 if (err) {
1772 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1773 err);
1774 goto out;
1775 } else if (netif_msg_probe(mac)) {
1776 printk(KERN_INFO "%s: PA Semi %s: intf %d, hw addr %pM\n",
1777 dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
1778 mac->dma_if, dev->dev_addr);
1779 }
1780
1781 return err;
1782
1783 out:
1784 pci_dev_put(mac->iob_pdev);
1785 pci_dev_put(mac->dma_pdev);
1786
1787 free_netdev(dev);
1788 out_disable_device:
1789 pci_disable_device(pdev);
1790 return err;
1791
1792 }
1793
pasemi_mac_remove(struct pci_dev * pdev)1794 static void pasemi_mac_remove(struct pci_dev *pdev)
1795 {
1796 struct net_device *netdev = pci_get_drvdata(pdev);
1797 struct pasemi_mac *mac;
1798
1799 if (!netdev)
1800 return;
1801
1802 mac = netdev_priv(netdev);
1803
1804 unregister_netdev(netdev);
1805
1806 pci_disable_device(pdev);
1807 pci_dev_put(mac->dma_pdev);
1808 pci_dev_put(mac->iob_pdev);
1809
1810 pasemi_dma_free_chan(&mac->tx->chan);
1811 pasemi_dma_free_chan(&mac->rx->chan);
1812
1813 free_netdev(netdev);
1814 }
1815
1816 static const struct pci_device_id pasemi_mac_pci_tbl[] = {
1817 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1818 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
1819 { },
1820 };
1821
1822 MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1823
1824 static struct pci_driver pasemi_mac_driver = {
1825 .name = "pasemi_mac",
1826 .id_table = pasemi_mac_pci_tbl,
1827 .probe = pasemi_mac_probe,
1828 .remove = pasemi_mac_remove,
1829 };
1830
pasemi_mac_cleanup_module(void)1831 static void __exit pasemi_mac_cleanup_module(void)
1832 {
1833 pci_unregister_driver(&pasemi_mac_driver);
1834 }
1835
pasemi_mac_init_module(void)1836 static int pasemi_mac_init_module(void)
1837 {
1838 int err;
1839
1840 err = pasemi_dma_init();
1841 if (err)
1842 return err;
1843
1844 return pci_register_driver(&pasemi_mac_driver);
1845 }
1846
1847 module_init(pasemi_mac_init_module);
1848 module_exit(pasemi_mac_cleanup_module);
1849