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1/*
2 * JMicron JMC2x0 series PCIe Ethernet Linux Device Driver
3 *
4 * Copyright 2008 JMicron Technology Corporation
5 * http://www.jmicron.com/
6 *
7 * Author: Guo-Fu Tseng <cooldavid@cooldavid.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 */
23
24/*
25 * Note:
26 * Backdoor for changing "FIFO Threshold for processing next packet"
27 * Using:
28 * ethtool -C eth1 adaptive-rx on adaptive-tx on \
29 * rx-usecs 250 rx-frames-low N
30 * N := 16 | 32 | 64 | 128
31 */
32
33/*
34 * Timeline before release:
35 * Stage 5: Advanced offloading support.
36 * 0.9:
37 * - Implement scatter-gather offloading.
38 * Use pci_map_page on scattered sk_buff for HIGHMEM support
39 * - Implement TCP Segement offloading.
40 * Due to TX FIFO size, we should turn off tso when mtu > 1500.
41 *
42 * Stage 6: CPU Load balancing.
43 * 1.0:
44 * - Implement MSI-X.
45 * Along with multiple RX queue, for CPU load balancing.
46 *
47 * Stage 7:
48 * - Cleanup/re-orginize code, performence tuneing(alignment etc...).
49 * - Test and Release 1.0
50 *
51 * Non-Critical:
52 * - Use NAPI instead of rx_tasklet?
53 * PCC Support Both Packet Counter and Timeout Interrupt for
54 * receive and transmit complete, does NAPI really needed?
55 * - Decode register dump for ethtool.
56 */
57
58#include <linux/version.h>
59#include <linux/module.h>
60#include <linux/kernel.h>
61#include <linux/pci.h>
62#include <linux/netdevice.h>
63#include <linux/etherdevice.h>
64#include <linux/ethtool.h>
65#include <linux/mii.h>
66#include <linux/crc32.h>
67#include <linux/delay.h>
68#include <linux/spinlock.h>
69#include <linux/in.h>
70#include <linux/ip.h>
71#include <linux/ipv6.h>
72#include <linux/tcp.h>
73#include <linux/udp.h>
74#include <linux/if_vlan.h>
75#include "jme.h"
76
77#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,21)
78static struct net_device_stats *
79jme_get_stats(struct net_device *netdev)
80{
81 struct jme_adapter *jme = netdev_priv(netdev);
82 return &jme->stats;
83}
84#endif
85
86static int
87jme_mdio_read(struct net_device *netdev, int phy, int reg)
88{
89 struct jme_adapter *jme = netdev_priv(netdev);
90 int i, val;
91
92 jwrite32(jme, JME_SMI, SMI_OP_REQ |
93 smi_phy_addr(phy) |
94 smi_reg_addr(reg));
95
96 wmb();
97 for (i = JME_PHY_TIMEOUT ; i > 0 ; --i) {
98 udelay(1);
99 if (((val = jread32(jme, JME_SMI)) & SMI_OP_REQ) == 0)
100 break;
101 }
102
103 if (i == 0) {
104 jeprintk(netdev->name, "phy read timeout : %d\n", reg);
105 return 0;
106 }
107
108 return ((val & SMI_DATA_MASK) >> SMI_DATA_SHIFT);
109}
110
111static void
112jme_mdio_write(struct net_device *netdev,
113 int phy, int reg, int val)
114{
115 struct jme_adapter *jme = netdev_priv(netdev);
116 int i;
117
118 jwrite32(jme, JME_SMI, SMI_OP_WRITE | SMI_OP_REQ |
119 ((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) |
120 smi_phy_addr(phy) | smi_reg_addr(reg));
121
122 wmb();
123 for (i = JME_PHY_TIMEOUT ; i > 0 ; --i) {
124 udelay(1);
125 if (((val = jread32(jme, JME_SMI)) & SMI_OP_REQ) == 0)
126 break;
127 }
128
129 if (i == 0)
130 jeprintk(netdev->name, "phy write timeout : %d\n", reg);
131
132 return;
133}
134
135__always_inline static void
136jme_reset_phy_processor(struct jme_adapter *jme)
137{
138 __u32 val;
139
140 jme_mdio_write(jme->dev,
141 jme->mii_if.phy_id,
142 MII_ADVERTISE, ADVERTISE_ALL |
143 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
144
145 jme_mdio_write(jme->dev,
146 jme->mii_if.phy_id,
147 MII_CTRL1000,
148 ADVERTISE_1000FULL | ADVERTISE_1000HALF);
149
150 val = jme_mdio_read(jme->dev,
151 jme->mii_if.phy_id,
152 MII_BMCR);
153
154 jme_mdio_write(jme->dev,
155 jme->mii_if.phy_id,
156 MII_BMCR, val | BMCR_RESET);
157
158 return;
159}
160
161
162__always_inline static void
163jme_reset_mac_processor(struct jme_adapter *jme)
164{
165 jwrite32(jme, JME_GHC, jme->reg_ghc | GHC_SWRST);
166 udelay(2);
167 jwrite32(jme, JME_GHC, jme->reg_ghc);
168 jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
169 jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
170 jwrite32(jme, JME_WFODP, 0);
171 jwrite32(jme, JME_WFOI, 0);
172 jwrite32(jme, JME_GPREG0, GPREG0_DEFAULT);
173 jwrite32(jme, JME_GPREG1, 0);
174}
175
176__always_inline static void
177jme_clear_pm(struct jme_adapter *jme)
178{
179 jwrite32(jme, JME_PMCS, 0xFFFF0000 | jme->reg_pmcs);
180 pci_set_power_state(jme->pdev, PCI_D0);
181 pci_enable_wake(jme->pdev, PCI_D0, false);
182}
183
184static int
185jme_reload_eeprom(struct jme_adapter *jme)
186{
187 __u32 val;
188 int i;
189
190 val = jread32(jme, JME_SMBCSR);
191
192 if(val & SMBCSR_EEPROMD)
193 {
194 val |= SMBCSR_CNACK;
195 jwrite32(jme, JME_SMBCSR, val);
196 val |= SMBCSR_RELOAD;
197 jwrite32(jme, JME_SMBCSR, val);
198 mdelay(12);
199
200 for (i = JME_SMB_TIMEOUT; i > 0; --i)
201 {
202 mdelay(1);
203 if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0)
204 break;
205 }
206
207 if(i == 0) {
208 jeprintk(jme->dev->name, "eeprom reload timeout\n");
209 return -EIO;
210 }
211 }
212 else
213 return -EIO;
214
215 return 0;
216}
217
218static void
219jme_load_macaddr(struct net_device *netdev)
220{
221 struct jme_adapter *jme = netdev_priv(netdev);
222 unsigned char macaddr[6];
223 __u32 val;
224
225 spin_lock(&jme->macaddr_lock);
226 val = jread32(jme, JME_RXUMA_LO);
227 macaddr[0] = (val >> 0) & 0xFF;
228 macaddr[1] = (val >> 8) & 0xFF;
229 macaddr[2] = (val >> 16) & 0xFF;
230 macaddr[3] = (val >> 24) & 0xFF;
231 val = jread32(jme, JME_RXUMA_HI);
232 macaddr[4] = (val >> 0) & 0xFF;
233 macaddr[5] = (val >> 8) & 0xFF;
234 memcpy(netdev->dev_addr, macaddr, 6);
235 spin_unlock(&jme->macaddr_lock);
236}
237
238__always_inline static void
239jme_set_rx_pcc(struct jme_adapter *jme, int p)
240{
241 switch(p) {
242 case PCC_P1:
243 jwrite32(jme, JME_PCCRX0,
244 ((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
245 ((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK));
246 break;
247 case PCC_P2:
248 jwrite32(jme, JME_PCCRX0,
249 ((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
250 ((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK));
251 break;
252 case PCC_P3:
253 jwrite32(jme, JME_PCCRX0,
254 ((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
255 ((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK));
256 break;
257 default:
258 break;
259 }
260
261 dprintk(jme->dev->name, "Switched to PCC_P%d\n", p);
262}
263
264static void
265jme_start_irq(struct jme_adapter *jme)
266{
267 register struct dynpcc_info *dpi = &(jme->dpi);
268
269 jme_set_rx_pcc(jme, PCC_P1);
270 dpi->cur = PCC_P1;
271 dpi->attempt = PCC_P1;
272 dpi->cnt = 0;
273
274 jwrite32(jme, JME_PCCTX,
275 ((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
276 ((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) |
277 PCCTXQ0_EN
278 );
279
280 /*
281 * Enable Interrupts
282 */
283 jwrite32(jme, JME_IENS, INTR_ENABLE);
284}
285
286__always_inline static void
287jme_stop_irq(struct jme_adapter *jme)
288{
289 /*
290 * Disable Interrupts
291 */
292 jwrite32(jme, JME_IENC, INTR_ENABLE);
293}
294
295
296__always_inline static void
297jme_enable_shadow(struct jme_adapter *jme)
298{
299 jwrite32(jme,
300 JME_SHBA_LO,
301 ((__u32)jme->shadow_dma & ~((__u32)0x1F)) | SHBA_POSTEN);
302}
303
304__always_inline static void
305jme_disable_shadow(struct jme_adapter *jme)
306{
307 jwrite32(jme, JME_SHBA_LO, 0x0);
308}
309
310static int
311jme_check_link(struct net_device *netdev, int testonly)
312{
313 struct jme_adapter *jme = netdev_priv(netdev);
314 __u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT, bmcr;
315 char linkmsg[64];
316 int rc = 0;
317
318 phylink = jread32(jme, JME_PHY_LINK);
319
320 if (phylink & PHY_LINK_UP) {
321 if(!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
322 /*
323 * If we did not enable AN
324 * Speed/Duplex Info should be obtained from SMI
325 */
326 phylink = PHY_LINK_UP;
327
328 bmcr = jme_mdio_read(jme->dev,
329 jme->mii_if.phy_id,
330 MII_BMCR);
331
332
333 phylink |= ((bmcr & BMCR_SPEED1000) &&
334 (bmcr & BMCR_SPEED100) == 0) ?
335 PHY_LINK_SPEED_1000M :
336 (bmcr & BMCR_SPEED100) ?
337 PHY_LINK_SPEED_100M :
338 PHY_LINK_SPEED_10M;
339
340 phylink |= (bmcr & BMCR_FULLDPLX) ?
341 PHY_LINK_DUPLEX : 0;
342
343 strcpy(linkmsg, "Forced: ");
344 }
345 else {
346 /*
347 * Keep polling for speed/duplex resolve complete
348 */
349 while(!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
350 --cnt) {
351
352 udelay(1);
353 phylink = jread32(jme, JME_PHY_LINK);
354
355 }
356
357 if(!cnt)
358 jeprintk(netdev->name,
359 "Waiting speed resolve timeout.\n");
360
361 strcpy(linkmsg, "ANed: ");
362 }
363
364 if(jme->phylink == phylink) {
365 rc = 1;
366 goto out;
367 }
368 if(testonly)
369 goto out;
370
371 jme->phylink = phylink;
372
373 switch(phylink & PHY_LINK_SPEED_MASK) {
374 case PHY_LINK_SPEED_10M:
375 ghc = GHC_SPEED_10M;
376 strcpy(linkmsg, "10 Mbps, ");
377 break;
378 case PHY_LINK_SPEED_100M:
379 ghc = GHC_SPEED_100M;
380 strcpy(linkmsg, "100 Mbps, ");
381 break;
382 case PHY_LINK_SPEED_1000M:
383 ghc = GHC_SPEED_1000M;
384 strcpy(linkmsg, "1000 Mbps, ");
385 break;
386 default:
387 ghc = 0;
388 break;
389 }
390 ghc |= (phylink & PHY_LINK_DUPLEX) ? GHC_DPX : 0;
391
392 strcat(linkmsg, (phylink &PHY_LINK_DUPLEX) ?
393 "Full-Duplex, " :
394 "Half-Duplex, ");
395
396 if(phylink & PHY_LINK_MDI_STAT)
397 strcat(linkmsg, "MDI-X");
398 else
399 strcat(linkmsg, "MDI");
400
401 if(phylink & PHY_LINK_DUPLEX)
402 jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
403 else {
404 jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
405 TXMCS_BACKOFF |
406 TXMCS_CARRIERSENSE |
407 TXMCS_COLLISION);
408 jwrite32(jme, JME_TXTRHD, TXTRHD_TXPEN |
409 ((0x2000 << TXTRHD_TXP_SHIFT) & TXTRHD_TXP) |
410 TXTRHD_TXREN |
411 ((8 << TXTRHD_TXRL_SHIFT) & TXTRHD_TXRL));
412 }
413
414 jme->reg_ghc = ghc;
415 jwrite32(jme, JME_GHC, ghc);
416
417 jprintk(netdev->name, "Link is up at %s.\n", linkmsg);
418 netif_carrier_on(netdev);
419 }
420 else {
421 if(testonly)
422 goto out;
423
424 jprintk(netdev->name, "Link is down.\n");
425 jme->phylink = 0;
426 netif_carrier_off(netdev);
427 }
428
429out:
430 return rc;
431}
432
433
434static int
435jme_alloc_txdesc(struct jme_adapter *jme,
436 int nr_alloc)
437{
438 struct jme_ring *txring = jme->txring;
439 int idx;
440
441 idx = txring->next_to_use;
442
443 if(unlikely(atomic_read(&txring->nr_free) < nr_alloc))
444 return -1;
445
446 atomic_sub(nr_alloc, &txring->nr_free);
447
448 if((txring->next_to_use += nr_alloc) >= RING_DESC_NR)
449 txring->next_to_use -= RING_DESC_NR;
450
451 return idx;
452}
453
454static void
455jme_tx_csum(struct sk_buff *skb, unsigned mtu, __u8 *flags)
456{
457 if(skb->ip_summed == CHECKSUM_PARTIAL) {
458 __u8 ip_proto;
459
460 switch (skb->protocol) {
461 case __constant_htons(ETH_P_IP):
462 ip_proto = ip_hdr(skb)->protocol;
463 break;
464 case __constant_htons(ETH_P_IPV6):
465 ip_proto = ipv6_hdr(skb)->nexthdr;
466 break;
467 default:
468 ip_proto = 0;
469 break;
470 }
471
472
473 switch(ip_proto) {
474 case IPPROTO_TCP:
475 *flags |= TXFLAG_TCPCS;
476 break;
477 case IPPROTO_UDP:
478 *flags |= TXFLAG_UDPCS;
479 break;
480 default:
481 jeprintk("jme", "Error upper layer protocol.\n");
482 break;
483 }
484 }
485}
486
487__always_inline static void
488jme_tx_vlan(struct sk_buff *skb, volatile __u16 *vlan, __u8 *flags)
489{
490 if(vlan_tx_tag_present(skb)) {
491 *flags |= TXFLAG_TAGON;
492 *vlan = vlan_tx_tag_get(skb);
493 }
494}
495
496static int
497jme_set_new_txdesc(struct jme_adapter *jme,
498 struct sk_buff *skb)
499{
500 struct jme_ring *txring = jme->txring;
501 volatile struct txdesc *txdesc = txring->desc, *ctxdesc;
502 struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
503 dma_addr_t dmaaddr;
504 int i, idx, nr_desc;
505 __u8 flags;
506
507 nr_desc = 2;
508 idx = jme_alloc_txdesc(jme, nr_desc);
509
510 if(unlikely(idx<0))
511 return NETDEV_TX_BUSY;
512
513 for(i = 1 ; i < nr_desc ; ++i) {
514 ctxdesc = txdesc + ((idx + i) & (RING_DESC_NR-1));
515 ctxbi = txbi + ((idx + i) & (RING_DESC_NR-1));
516
517 dmaaddr = pci_map_single(jme->pdev,
518 skb->data,
519 skb->len,
520 PCI_DMA_TODEVICE);
521
522 pci_dma_sync_single_for_device(jme->pdev,
523 dmaaddr,
524 skb->len,
525 PCI_DMA_TODEVICE);
526
527 ctxdesc->dw[0] = 0;
528 ctxdesc->dw[1] = 0;
529 ctxdesc->desc2.flags = TXFLAG_OWN;
530 if(jme->dev->features & NETIF_F_HIGHDMA)
531 ctxdesc->desc2.flags |= TXFLAG_64BIT;
532 ctxdesc->desc2.datalen = cpu_to_le16(skb->len);
533 ctxdesc->desc2.bufaddrh = cpu_to_le32((__u64)dmaaddr >> 32);
534 ctxdesc->desc2.bufaddrl = cpu_to_le32(
535 (__u64)dmaaddr & 0xFFFFFFFFUL);
536
537 ctxbi->mapping = dmaaddr;
538 ctxbi->len = skb->len;
539 }
540
541 ctxdesc = txdesc + idx;
542 ctxbi = txbi + idx;
543
544 ctxdesc->dw[0] = 0;
545 ctxdesc->dw[1] = 0;
546 ctxdesc->dw[2] = 0;
547 ctxdesc->dw[3] = 0;
548 ctxdesc->desc1.pktsize = cpu_to_le16(skb->len);
549 /*
550 * Set OWN bit at final.
551 * When kernel transmit faster than NIC.
552 * And NIC trying to send this descriptor before we tell
553 * it to start sending this TX queue.
554 * Other fields are already filled correctly.
555 */
556 wmb();
557 flags = TXFLAG_OWN | TXFLAG_INT;
558 jme_tx_csum(skb, jme->dev->mtu, &flags);
559 jme_tx_vlan(skb, &(ctxdesc->desc1.vlan), &flags);
560 ctxdesc->desc1.flags = flags;
561 /*
562 * Set tx buffer info after telling NIC to send
563 * For better tx_clean timing
564 */
565 wmb();
566 ctxbi->nr_desc = nr_desc;
567 ctxbi->skb = skb;
568
569 tx_dbg(jme->dev->name, "Xmit: %d+%d\n", idx, nr_desc);
570
571 return 0;
572}
573
574
575static int
576jme_setup_tx_resources(struct jme_adapter *jme)
577{
578 struct jme_ring *txring = &(jme->txring[0]);
579
580 txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
581 TX_RING_ALLOC_SIZE,
582 &(txring->dmaalloc),
583 GFP_ATOMIC);
584
585 if(!txring->alloc) {
586 txring->desc = NULL;
587 txring->dmaalloc = 0;
588 txring->dma = 0;
589 return -ENOMEM;
590 }
591
592 /*
593 * 16 Bytes align
594 */
595 txring->desc = (void*)ALIGN((unsigned long)(txring->alloc),
596 RING_DESC_ALIGN);
597 txring->dma = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
598 txring->next_to_use = 0;
599 txring->next_to_clean = 0;
600 atomic_set(&txring->nr_free, RING_DESC_NR);
601
602 /*
603 * Initiallize Transmit Descriptors
604 */
605 memset(txring->alloc, 0, TX_RING_ALLOC_SIZE);
606 memset(txring->bufinf, 0,
607 sizeof(struct jme_buffer_info) * RING_DESC_NR);
608
609 return 0;
610}
611
612static void
613jme_free_tx_resources(struct jme_adapter *jme)
614{
615 int i;
616 struct jme_ring *txring = &(jme->txring[0]);
617 struct jme_buffer_info *txbi = txring->bufinf;
618
619 if(txring->alloc) {
620 for(i = 0 ; i < RING_DESC_NR ; ++i) {
621 txbi = txring->bufinf + i;
622 if(txbi->skb) {
623 dev_kfree_skb(txbi->skb);
624 txbi->skb = NULL;
625 }
626 txbi->mapping = 0;
627 txbi->len = 0;
628 txbi->nr_desc = 0;
629 }
630
631 dma_free_coherent(&(jme->pdev->dev),
632 TX_RING_ALLOC_SIZE,
633 txring->alloc,
634 txring->dmaalloc);
635
636 txring->alloc = NULL;
637 txring->desc = NULL;
638 txring->dmaalloc = 0;
639 txring->dma = 0;
640 }
641 txring->next_to_use = 0;
642 txring->next_to_clean = 0;
643 atomic_set(&txring->nr_free, 0);
644
645}
646
647__always_inline static void
648jme_enable_tx_engine(struct jme_adapter *jme)
649{
650 /*
651 * Select Queue 0
652 */
653 jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
654
655 /*
656 * Setup TX Queue 0 DMA Bass Address
657 */
658 jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
659 jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
660 jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
661
662 /*
663 * Setup TX Descptor Count
664 */
665 jwrite32(jme, JME_TXQDC, RING_DESC_NR);
666
667 /*
668 * Enable TX Engine
669 */
670 wmb();
671 jwrite32(jme, JME_TXCS, jme->reg_txcs |
672 TXCS_SELECT_QUEUE0 |
673 TXCS_ENABLE);
674
675}
676
677__always_inline static void
678jme_restart_tx_engine(struct jme_adapter *jme)
679{
680 /*
681 * Restart TX Engine
682 */
683 jwrite32(jme, JME_TXCS, jme->reg_txcs |
684 TXCS_SELECT_QUEUE0 |
685 TXCS_ENABLE);
686}
687
688__always_inline static void
689jme_disable_tx_engine(struct jme_adapter *jme)
690{
691 int i;
692 __u32 val;
693
694 /*
695 * Disable TX Engine
696 */
697 jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
698
699 val = jread32(jme, JME_TXCS);
700 for(i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i)
701 {
702 mdelay(1);
703 val = jread32(jme, JME_TXCS);
704 }
705
706 if(!i) {
707 jeprintk(jme->dev->name, "Disable TX engine timeout.\n");
708 jme_reset_mac_processor(jme);
709 }
710
711
712}
713
714static void
715jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
716{
717 struct jme_ring *rxring = jme->rxring;
718 register volatile struct rxdesc* rxdesc = rxring->desc;
719 struct jme_buffer_info *rxbi = rxring->bufinf;
720 rxdesc += i;
721 rxbi += i;
722
723 rxdesc->dw[0] = 0;
724 rxdesc->dw[1] = 0;
725 rxdesc->desc1.bufaddrh = cpu_to_le32((__u64)rxbi->mapping >> 32);
726 rxdesc->desc1.bufaddrl = cpu_to_le32(
727 (__u64)rxbi->mapping & 0xFFFFFFFFUL);
728 rxdesc->desc1.datalen = cpu_to_le16(rxbi->len);
729 if(jme->dev->features & NETIF_F_HIGHDMA)
730 rxdesc->desc1.flags = RXFLAG_64BIT;
731 wmb();
732 rxdesc->desc1.flags |= RXFLAG_OWN | RXFLAG_INT;
733}
734
735static int
736jme_make_new_rx_buf(struct jme_adapter *jme, int i)
737{
738 struct jme_ring *rxring = &(jme->rxring[0]);
739 struct jme_buffer_info *rxbi = rxring->bufinf;
740 unsigned long offset;
741 struct sk_buff* skb;
742
743 skb = netdev_alloc_skb(jme->dev,
744 jme->dev->mtu + RX_EXTRA_LEN);
745 if(unlikely(!skb))
746 return -ENOMEM;
747
748 if(unlikely(skb_is_nonlinear(skb))) {
749 dprintk(jme->dev->name,
750 "Allocated skb fragged(%d).\n",
751 skb_shinfo(skb)->nr_frags);
752 dev_kfree_skb(skb);
753 return -ENOMEM;
754 }
755
756 if(unlikely(offset =
757 (unsigned long)(skb->data)
758 & ((unsigned long)RX_BUF_DMA_ALIGN - 1)))
759 skb_reserve(skb, RX_BUF_DMA_ALIGN - offset);
760
761 rxbi += i;
762 rxbi->skb = skb;
763 rxbi->len = skb_tailroom(skb);
764 rxbi->mapping = pci_map_single(jme->pdev,
765 skb->data,
766 rxbi->len,
767 PCI_DMA_FROMDEVICE);
768
769 return 0;
770}
771
772static void
773jme_free_rx_buf(struct jme_adapter *jme, int i)
774{
775 struct jme_ring *rxring = &(jme->rxring[0]);
776 struct jme_buffer_info *rxbi = rxring->bufinf;
777 rxbi += i;
778
779 if(rxbi->skb) {
780 pci_unmap_single(jme->pdev,
781 rxbi->mapping,
782 rxbi->len,
783 PCI_DMA_FROMDEVICE);
784 dev_kfree_skb(rxbi->skb);
785 rxbi->skb = NULL;
786 rxbi->mapping = 0;
787 rxbi->len = 0;
788 }
789}
790
791static void
792jme_free_rx_resources(struct jme_adapter *jme)
793{
794 int i;
795 struct jme_ring *rxring = &(jme->rxring[0]);
796
797 if(rxring->alloc) {
798 for(i = 0 ; i < RING_DESC_NR ; ++i)
799 jme_free_rx_buf(jme, i);
800
801 dma_free_coherent(&(jme->pdev->dev),
802 RX_RING_ALLOC_SIZE,
803 rxring->alloc,
804 rxring->dmaalloc);
805 rxring->alloc = NULL;
806 rxring->desc = NULL;
807 rxring->dmaalloc = 0;
808 rxring->dma = 0;
809 }
810 rxring->next_to_use = 0;
811 rxring->next_to_clean = 0;
812}
813
814static int
815jme_setup_rx_resources(struct jme_adapter *jme)
816{
817 int i;
818 struct jme_ring *rxring = &(jme->rxring[0]);
819
820 rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
821 RX_RING_ALLOC_SIZE,
822 &(rxring->dmaalloc),
823 GFP_ATOMIC);
824 if(!rxring->alloc) {
825 rxring->desc = NULL;
826 rxring->dmaalloc = 0;
827 rxring->dma = 0;
828 return -ENOMEM;
829 }
830
831 /*
832 * 16 Bytes align
833 */
834 rxring->desc = (void*)ALIGN((unsigned long)(rxring->alloc),
835 RING_DESC_ALIGN);
836 rxring->dma = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
837 rxring->next_to_use = 0;
838 rxring->next_to_clean = 0;
839
840 /*
841 * Initiallize Receive Descriptors
842 */
843 for(i = 0 ; i < RING_DESC_NR ; ++i) {
844 if(unlikely(jme_make_new_rx_buf(jme, i))) {
845 jme_free_rx_resources(jme);
846 return -ENOMEM;
847 }
848
849 jme_set_clean_rxdesc(jme, i);
850 }
851
852 return 0;
853}
854
855__always_inline static void
856jme_enable_rx_engine(struct jme_adapter *jme)
857{
858 /*
859 * Setup RX DMA Bass Address
860 */
861 jwrite32(jme, JME_RXDBA_LO, (__u64)jme->rxring[0].dma & 0xFFFFFFFFUL);
862 jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
863 jwrite32(jme, JME_RXNDA, (__u64)jme->rxring[0].dma & 0xFFFFFFFFUL);
864
865 /*
866 * Setup RX Descptor Count
867 */
868 jwrite32(jme, JME_RXQDC, RING_DESC_NR);
869
870 /*
871 * Setup Unicast Filter
872 */
873 jme_set_multi(jme->dev);
874
875 /*
876 * Enable RX Engine
877 */
878 wmb();
879 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
880 RXCS_QUEUESEL_Q0 |
881 RXCS_ENABLE |
882 RXCS_QST);
883}
884
885__always_inline static void
886jme_restart_rx_engine(struct jme_adapter *jme)
887{
888 /*
889 * Start RX Engine
890 */
891 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
892 RXCS_QUEUESEL_Q0 |
893 RXCS_ENABLE |
894 RXCS_QST);
895}
896
897
898__always_inline static void
899jme_disable_rx_engine(struct jme_adapter *jme)
900{
901 int i;
902 __u32 val;
903
904 /*
905 * Disable RX Engine
906 */
907 jwrite32(jme, JME_RXCS, jme->reg_rxcs);
908
909 val = jread32(jme, JME_RXCS);
910 for(i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i)
911 {
912 mdelay(1);
913 val = jread32(jme, JME_RXCS);
914 }
915
916 if(!i)
917 jeprintk(jme->dev->name, "Disable RX engine timeout.\n");
918
919}
920
921static void
922jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
923{
924 struct jme_ring *rxring = &(jme->rxring[0]);
925 volatile struct rxdesc *rxdesc = rxring->desc;
926 struct jme_buffer_info *rxbi = rxring->bufinf;
927 struct sk_buff *skb;
928 int framesize;
929
930 rxdesc += idx;
931 rxbi += idx;
932
933 skb = rxbi->skb;
934 pci_dma_sync_single_for_cpu(jme->pdev,
935 rxbi->mapping,
936 rxbi->len,
937 PCI_DMA_FROMDEVICE);
938
939 if(unlikely(jme_make_new_rx_buf(jme, idx))) {
940 pci_dma_sync_single_for_device(jme->pdev,
941 rxbi->mapping,
942 rxbi->len,
943 PCI_DMA_FROMDEVICE);
944
945 ++(NET_STAT(jme).rx_dropped);
946 }
947 else {
948 framesize = le16_to_cpu(rxdesc->descwb.framesize)
949 - RX_PREPAD_SIZE;
950
951 skb_reserve(skb, RX_PREPAD_SIZE);
952 skb_put(skb, framesize);
953 skb->protocol = eth_type_trans(skb, jme->dev);
954
955 if((rxdesc->descwb.flags &
956 (RXWBFLAG_TCPON |
957 RXWBFLAG_UDPON |
958 RXWBFLAG_IPV4)))
959 skb->ip_summed = CHECKSUM_UNNECESSARY;
960 else
961 skb->ip_summed = CHECKSUM_NONE;
962
963 if(jme->vlgrp && (rxdesc->descwb.flags & RXWBFLAG_TAGON))
964 vlan_hwaccel_rx(skb, jme->vlgrp,
965 le32_to_cpu(rxdesc->descwb.vlan));
966 else
967 netif_rx(skb);
968
969 if(le16_to_cpu(rxdesc->descwb.flags) & RXWBFLAG_DEST_MUL)
970 ++(NET_STAT(jme).multicast);
971
972 jme->dev->last_rx = jiffies;
973 NET_STAT(jme).rx_bytes += framesize;
974 ++(NET_STAT(jme).rx_packets);
975 }
976
977 jme_set_clean_rxdesc(jme, idx);
978
979}
980
981static int
982jme_rxsum_bad(struct jme_adapter *jme, __u16 flags)
983{
984 if(unlikely((flags & RXWBFLAG_TCPON) &&
985 !(flags & RXWBFLAG_TCPCS))) {
986 csum_dbg(jme->dev->name, "TCP Checksum error.\n");
987 return 1;
988 }
989 else if(unlikely((flags & RXWBFLAG_UDPON) &&
990 !(flags & RXWBFLAG_UDPCS))) {
991 csum_dbg(jme->dev->name, "UDP Checksum error.\n");
992 return 1;
993 }
994 else if(unlikely((flags & RXWBFLAG_IPV4) &&
995 !(flags & RXWBFLAG_IPCS))) {
996 csum_dbg(jme->dev->name, "IPV4 Checksum error.\n");
997 return 1;
998 }
999 else {
1000 return 0;
1001 }
1002}
1003
1004static int
1005jme_process_receive(struct jme_adapter *jme, int limit)
1006{
1007 struct jme_ring *rxring = &(jme->rxring[0]);
1008 volatile struct rxdesc *rxdesc = rxring->desc;
1009 int i, j, ccnt, desccnt;
1010
1011 i = rxring->next_to_clean;
1012 while( limit-- > 0 )
1013 {
1014 rxdesc = rxring->desc;
1015 rxdesc += i;
1016
1017 if((rxdesc->descwb.flags & RXWBFLAG_OWN) ||
1018 !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
1019 goto out;
1020
1021 desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
1022
1023 rx_dbg(jme->dev->name, "RX: Cleaning %d\n", i);
1024
1025 if(unlikely(desccnt > 1 ||
1026 rxdesc->descwb.errstat & RXWBERR_ALLERR ||
1027 jme_rxsum_bad(jme, rxdesc->descwb.flags))) {
1028
1029 if(rxdesc->descwb.errstat & RXWBERR_CRCERR)
1030 ++(NET_STAT(jme).rx_crc_errors);
1031 else if(rxdesc->descwb.errstat & RXWBERR_OVERUN)
1032 ++(NET_STAT(jme).rx_fifo_errors);
1033 else
1034 ++(NET_STAT(jme).rx_errors);
1035
1036 if(desccnt > 1) {
1037 rx_dbg(jme->dev->name,
1038 "RX: More than one(%d) descriptor, "
1039 "framelen=%d\n",
1040 desccnt, le16_to_cpu(rxdesc->descwb.framesize));
1041 limit -= desccnt - 1;
1042 }
1043
1044 for(j = i, ccnt = desccnt ; ccnt-- ; ) {
1045 jme_set_clean_rxdesc(jme, j);
1046
1047 if(unlikely(++j == RING_DESC_NR))
1048 j = 0;
1049 }
1050
1051 }
1052 else {
1053 jme_alloc_and_feed_skb(jme, i);
1054 }
1055
1056 if((i += desccnt) >= RING_DESC_NR)
1057 i -= RING_DESC_NR;
1058 }
1059
1060out:
1061 rx_dbg(jme->dev->name, "RX: Stop at %d\n", i);
1062 rx_dbg(jme->dev->name, "RX: RXNDA offset %d\n",
1063 (jread32(jme, JME_RXNDA) - jread32(jme, JME_RXDBA_LO))
1064 >> 4);
1065
1066 rxring->next_to_clean = i;
1067
1068 return limit > 0 ? limit : 0;
1069
1070}
1071
1072static void
1073jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
1074{
1075 if(likely(atmp == dpi->cur))
1076 return;
1077
1078 if(dpi->attempt == atmp) {
1079 ++(dpi->cnt);
1080 }
1081 else {
1082 dpi->attempt = atmp;
1083 dpi->cnt = 0;
1084 }
1085
1086}
1087
1088static void
1089jme_dynamic_pcc(struct jme_adapter *jme)
1090{
1091 register struct dynpcc_info *dpi = &(jme->dpi);
1092
1093 if((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
1094 jme_attempt_pcc(dpi, PCC_P3);
1095 else if((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P2_THRESHOLD
1096 || dpi->intr_cnt > PCC_INTR_THRESHOLD)
1097 jme_attempt_pcc(dpi, PCC_P2);
1098 else
1099 jme_attempt_pcc(dpi, PCC_P1);
1100
1101 if(unlikely(dpi->attempt != dpi->cur && dpi->cnt > 20)) {
1102 jme_set_rx_pcc(jme, dpi->attempt);
1103 dpi->cur = dpi->attempt;
1104 dpi->cnt = 0;
1105 }
1106}
1107
1108static void
1109jme_start_pcc_timer(struct jme_adapter *jme)
1110{
1111 struct dynpcc_info *dpi = &(jme->dpi);
1112 dpi->last_bytes = NET_STAT(jme).rx_bytes;
1113 dpi->last_pkts = NET_STAT(jme).rx_packets;
1114 dpi->intr_cnt = 0;
1115 jwrite32(jme, JME_TMCSR,
1116 TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
1117}
1118
1119static void
1120jme_stop_pcc_timer(struct jme_adapter *jme)
1121{
1122 jwrite32(jme, JME_TMCSR, 0);
1123}
1124
1125static void
1126jme_pcc_tasklet(unsigned long arg)
1127{
1128 struct jme_adapter *jme = (struct jme_adapter*)arg;
1129 struct net_device *netdev = jme->dev;
1130
1131
1132 if(unlikely(netif_queue_stopped(netdev) ||
1133 (atomic_read(&jme->link_changing) != 1)
1134 )) {
1135 jme_stop_pcc_timer(jme);
1136 return;
1137 }
1138
1139 jme_dynamic_pcc(jme);
1140 jme_start_pcc_timer(jme);
1141}
1142
1143static void
1144jme_link_change_tasklet(unsigned long arg)
1145{
1146 struct jme_adapter *jme = (struct jme_adapter*)arg;
1147 struct net_device *netdev = jme->dev;
1148 int timeout = WAIT_TASKLET_TIMEOUT;
1149 int rc;
1150
1151 if(!atomic_dec_and_test(&jme->link_changing))
1152 goto out;
1153
1154 if(jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
1155 goto out;
1156
1157 jme->old_mtu = netdev->mtu;
1158 netif_stop_queue(netdev);
1159
1160 while(--timeout > 0 &&
1161 (
1162 atomic_read(&jme->rx_cleaning) != 1 ||
1163 atomic_read(&jme->tx_cleaning) != 1
1164 )) {
1165
1166 mdelay(1);
1167 }
1168
1169 if(netif_carrier_ok(netdev)) {
1170 jme_stop_pcc_timer(jme);
1171 jme_reset_mac_processor(jme);
1172 jme_free_rx_resources(jme);
1173 jme_free_tx_resources(jme);
1174 }
1175
1176 jme_check_link(netdev, 0);
1177 if(netif_carrier_ok(netdev)) {
1178 rc = jme_setup_rx_resources(jme);
1179 if(rc) {
1180 jeprintk(netdev->name,
1181 "Allocating resources for RX error"
1182 ", Device STOPPED!\n");
1183 goto out;
1184 }
1185
1186
1187 rc = jme_setup_tx_resources(jme);
1188 if(rc) {
1189 jeprintk(netdev->name,
1190 "Allocating resources for TX error"
1191 ", Device STOPPED!\n");
1192 goto err_out_free_rx_resources;
1193 }
1194
1195 jme_enable_rx_engine(jme);
1196 jme_enable_tx_engine(jme);
1197
1198 netif_start_queue(netdev);
1199 jme_start_pcc_timer(jme);
1200 }
1201
1202 goto out;
1203
1204err_out_free_rx_resources:
1205 jme_free_rx_resources(jme);
1206out:
1207 atomic_inc(&jme->link_changing);
1208}
1209
1210static void
1211jme_rx_clean_tasklet(unsigned long arg)
1212{
1213 struct jme_adapter *jme = (struct jme_adapter*)arg;
1214 struct dynpcc_info *dpi = &(jme->dpi);
1215
1216 if(unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
1217 goto out;
1218
1219 if(unlikely(atomic_read(&jme->link_changing) != 1))
1220 goto out;
1221
1222 if(unlikely(netif_queue_stopped(jme->dev)))
1223 goto out;
1224
1225 jme_process_receive(jme, RING_DESC_NR);
1226 ++(dpi->intr_cnt);
1227
1228out:
1229 atomic_inc(&jme->rx_cleaning);
1230}
1231
1232static void
1233jme_rx_empty_tasklet(unsigned long arg)
1234{
1235 struct jme_adapter *jme = (struct jme_adapter*)arg;
1236
1237 if(unlikely(atomic_read(&jme->link_changing) != 1))
1238 return;
1239
1240 if(unlikely(netif_queue_stopped(jme->dev)))
1241 return;
1242
1243 queue_dbg(jme->dev->name, "RX Queue empty!\n");
1244
1245 jme_rx_clean_tasklet(arg);
1246 jme_restart_rx_engine(jme);
1247}
1248
1249static void
1250jme_tx_clean_tasklet(unsigned long arg)
1251{
1252 struct jme_adapter *jme = (struct jme_adapter*)arg;
1253 struct jme_ring *txring = &(jme->txring[0]);
1254 volatile struct txdesc *txdesc = txring->desc;
1255 struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
1256 int i, j, cnt = 0, max, err;
1257
1258 if(unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
1259 goto out;
1260
1261 if(unlikely(atomic_read(&jme->link_changing) != 1))
1262 goto out;
1263
1264 if(unlikely(netif_queue_stopped(jme->dev)))
1265 goto out;
1266
1267 max = RING_DESC_NR - atomic_read(&txring->nr_free);
1268
1269 tx_dbg(jme->dev->name, "Tx Tasklet: In\n");
1270
1271 for(i = txring->next_to_clean ; cnt < max ; ) {
1272
1273 ctxbi = txbi + i;
1274
1275 if(ctxbi->skb && !(txdesc[i].descwb.flags & TXWBFLAG_OWN)) {
1276
1277 err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
1278
1279 tx_dbg(jme->dev->name,
1280 "Tx Tasklet: Clean %d+%d\n",
1281 i, ctxbi->nr_desc);
1282
1283 for(j = 1 ; j < ctxbi->nr_desc ; ++j) {
1284 ttxbi = txbi + ((i + j) & (RING_DESC_NR - 1));
1285 txdesc[(i+j)&(RING_DESC_NR-1)].dw[0] = 0;
1286
1287 pci_unmap_single(jme->pdev,
1288 ttxbi->mapping,
1289 ttxbi->len,
1290 PCI_DMA_TODEVICE);
1291
1292 if(likely(!err))
1293 NET_STAT(jme).tx_bytes += ttxbi->len;
1294
1295 ttxbi->mapping = 0;
1296 ttxbi->len = 0;
1297 }
1298
1299 dev_kfree_skb(ctxbi->skb);
1300 ctxbi->skb = NULL;
1301
1302 cnt += ctxbi->nr_desc;
1303
1304 if(unlikely(err))
1305 ++(NET_STAT(jme).tx_carrier_errors);
1306 else
1307 ++(NET_STAT(jme).tx_packets);
1308 }
1309 else {
1310 if(!ctxbi->skb)
1311 tx_dbg(jme->dev->name,
1312 "Tx Tasklet:"
1313 " Stoped due to no skb.\n");
1314 else
1315 tx_dbg(jme->dev->name,
1316 "Tx Tasklet:"
1317 "Stoped due to not done.\n");
1318 break;
1319 }
1320
1321 if(unlikely((i += ctxbi->nr_desc) >= RING_DESC_NR))
1322 i -= RING_DESC_NR;
1323
1324 ctxbi->nr_desc = 0;
1325 }
1326
1327 tx_dbg(jme->dev->name,
1328 "Tx Tasklet: Stop %d Jiffies %lu\n",
1329 i, jiffies);
1330 txring->next_to_clean = i;
1331
1332 atomic_add(cnt, &txring->nr_free);
1333
1334out:
1335 atomic_inc(&jme->tx_cleaning);
1336}
1337
1338static void
1339jme_intr_msi(struct jme_adapter *jme, __u32 intrstat)
1340{
1341 /*
1342 * Disable interrupt
1343 */
1344 jwrite32f(jme, JME_IENC, INTR_ENABLE);
1345
1346 /*
1347 * Write 1 clear interrupt status
1348 */
1349 jwrite32f(jme, JME_IEVE, intrstat);
1350
1351 if(intrstat & (INTR_LINKCH | INTR_SWINTR)) {
1352 tasklet_schedule(&jme->linkch_task);
1353 goto out_reenable;
1354 }
1355
1356 if(intrstat & INTR_TMINTR)
1357 tasklet_schedule(&jme->pcc_task);
1358
1359 if(intrstat & INTR_RX0EMP)
1360 tasklet_schedule(&jme->rxempty_task);
1361
1362 if(intrstat & (INTR_PCCRX0TO | INTR_PCCRX0))
1363 tasklet_schedule(&jme->rxclean_task);
1364
1365 if(intrstat & (INTR_PCCTXTO | INTR_PCCTX))
1366 tasklet_schedule(&jme->txclean_task);
1367
1368 if((intrstat & ~INTR_ENABLE) != 0) {
1369 /*
1370 * Some interrupt not handled
1371 * but not enabled also (for debug)
1372 */
1373 }
1374
1375out_reenable:
1376 /*
1377 * Re-enable interrupt
1378 */
1379 jwrite32f(jme, JME_IENS, INTR_ENABLE);
1380
1381
1382}
1383
1384static irqreturn_t
1385jme_intr(int irq, void *dev_id)
1386{
1387 struct net_device *netdev = dev_id;
1388 struct jme_adapter *jme = netdev_priv(netdev);
1389 __u32 intrstat;
1390
1391 intrstat = jread32(jme, JME_IEVE);
1392
1393 /*
1394 * Check if it's really an interrupt for us
1395 */
1396 if(unlikely(intrstat == 0))
1397 return IRQ_NONE;
1398
1399 /*
1400 * Check if the device still exist
1401 */
1402 if(unlikely(intrstat == ~((typeof(intrstat))0)))
1403 return IRQ_NONE;
1404
1405 jme_intr_msi(jme, intrstat);
1406
1407 return IRQ_HANDLED;
1408}
1409
1410static irqreturn_t
1411jme_msi(int irq, void *dev_id)
1412{
1413 struct net_device *netdev = dev_id;
1414 struct jme_adapter *jme = netdev_priv(netdev);
1415 __u32 intrstat;
1416
1417 pci_dma_sync_single_for_cpu(jme->pdev,
1418 jme->shadow_dma,
1419 sizeof(__u32) * SHADOW_REG_NR,
1420 PCI_DMA_FROMDEVICE);
1421 intrstat = jme->shadow_regs[SHADOW_IEVE];
1422 jme->shadow_regs[SHADOW_IEVE] = 0;
1423
1424 jme_intr_msi(jme, intrstat);
1425
1426 return IRQ_HANDLED;
1427}
1428
1429
1430static void
1431jme_reset_link(struct jme_adapter *jme)
1432{
1433 jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
1434}
1435
1436static void
1437jme_restart_an(struct jme_adapter *jme)
1438{
1439 __u32 bmcr;
1440 unsigned long flags;
1441
1442 spin_lock_irqsave(&jme->phy_lock, flags);
1443 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1444 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1445 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1446 spin_unlock_irqrestore(&jme->phy_lock, flags);
1447}
1448
1449static int
1450jme_request_irq(struct jme_adapter *jme)
1451{
1452 int rc;
1453 struct net_device *netdev = jme->dev;
1454 irq_handler_t handler = jme_intr;
1455 int irq_flags = IRQF_SHARED;
1456
1457 if (!pci_enable_msi(jme->pdev)) {
1458 jme->flags |= JME_FLAG_MSI;
1459 handler = jme_msi;
1460 irq_flags = 0;
1461 }
1462
1463 rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
1464 netdev);
1465 if(rc) {
1466 jeprintk(netdev->name,
1467 "Unable to allocate %s interrupt (return: %d)\n",
1468 jme->flags & JME_FLAG_MSI ? "MSI":"INTx", rc);
1469
1470 if(jme->flags & JME_FLAG_MSI) {
1471 pci_disable_msi(jme->pdev);
1472 jme->flags &= ~JME_FLAG_MSI;
1473 }
1474 }
1475 else {
1476 netdev->irq = jme->pdev->irq;
1477 }
1478
1479 return rc;
1480}
1481
1482static void
1483jme_free_irq(struct jme_adapter *jme)
1484{
1485 free_irq(jme->pdev->irq, jme->dev);
1486 if (jme->flags & JME_FLAG_MSI) {
1487 pci_disable_msi(jme->pdev);
1488 jme->flags &= ~JME_FLAG_MSI;
1489 jme->dev->irq = jme->pdev->irq;
1490 }
1491}
1492
1493static int
1494jme_open(struct net_device *netdev)
1495{
1496 struct jme_adapter *jme = netdev_priv(netdev);
1497 int rc, timeout = 100;
1498
1499 while(
1500 --timeout > 0 &&
1501 (
1502 atomic_read(&jme->link_changing) != 1 ||
1503 atomic_read(&jme->rx_cleaning) != 1 ||
1504 atomic_read(&jme->tx_cleaning) != 1
1505 )
1506 )
1507 msleep(10);
1508
1509 if(!timeout) {
1510 rc = -EBUSY;
1511 goto err_out;
1512 }
1513
1514 jme_clear_pm(jme);
1515 jme_reset_mac_processor(jme);
1516
1517 rc = jme_request_irq(jme);
1518 if(rc)
1519 goto err_out;
1520
1521 jme_enable_shadow(jme);
1522 jme_start_irq(jme);
1523
1524 if(jme->flags & JME_FLAG_SSET)
1525 jme_set_settings(netdev, &jme->old_ecmd);
1526 else
1527 jme_reset_phy_processor(jme);
1528
1529 jme_reset_link(jme);
1530
1531 return 0;
1532
1533err_out:
1534 netif_stop_queue(netdev);
1535 netif_carrier_off(netdev);
1536 return rc;
1537}
1538
1539static void
1540jme_set_100m_half(struct jme_adapter *jme)
1541{
1542 __u32 bmcr, tmp;
1543
1544 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1545 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
1546 BMCR_SPEED1000 | BMCR_FULLDPLX);
1547 tmp |= BMCR_SPEED100;
1548
1549 if (bmcr != tmp)
1550 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
1551
1552 jwrite32(jme, JME_GHC, GHC_SPEED_100M);
1553}
1554
1555static void
1556jme_phy_off(struct jme_adapter *jme)
1557{
1558 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, BMCR_PDOWN);
1559}
1560
1561
1562static int
1563jme_close(struct net_device *netdev)
1564{
1565 struct jme_adapter *jme = netdev_priv(netdev);
1566
1567 netif_stop_queue(netdev);
1568 netif_carrier_off(netdev);
1569
1570 jme_stop_irq(jme);
1571 jme_disable_shadow(jme);
1572 jme_free_irq(jme);
1573
1574 tasklet_kill(&jme->linkch_task);
1575 tasklet_kill(&jme->txclean_task);
1576 tasklet_kill(&jme->rxclean_task);
1577 tasklet_kill(&jme->rxempty_task);
1578
1579 jme_reset_mac_processor(jme);
1580 jme_free_rx_resources(jme);
1581 jme_free_tx_resources(jme);
1582 jme->phylink = 0;
1583
1584 if(jme->reg_pmcs) {
1585 jme_set_100m_half(jme);
1586 pci_enable_wake(jme->pdev, PCI_D0, true);
1587 pci_enable_wake(jme->pdev, PCI_D3hot, true);
1588 pci_enable_wake(jme->pdev, PCI_D3cold, true);
1589 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
1590 }
1591 else {
1592 jme_phy_off(jme);
1593 }
1594
1595 return 0;
1596}
1597
1598/*
1599 * This function is already protected by netif_tx_lock()
1600 */
1601static int
1602jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
1603{
1604 struct jme_adapter *jme = netdev_priv(netdev);
1605 int rc;
1606
1607 if(unlikely(netif_queue_stopped(jme->dev)))
1608 return NETDEV_TX_BUSY;
1609
1610#if 0
1611/*Testing*/
1612 ("jme", "Frags: %d Headlen: %d Len: %d Sum:%d\n",
1613 skb_shinfo(skb)->nr_frags,
1614 skb_headlen(skb),
1615 skb->len,
1616 skb->ip_summed);
1617/*********/
1618#endif
1619
1620 rc = jme_set_new_txdesc(jme, skb);
1621
1622 if(unlikely(rc != NETDEV_TX_OK))
1623 return rc;
1624
1625 jwrite32(jme, JME_TXCS, jme->reg_txcs |
1626 TXCS_SELECT_QUEUE0 |
1627 TXCS_QUEUE0S |
1628 TXCS_ENABLE);
1629 netdev->trans_start = jiffies;
1630
1631 return NETDEV_TX_OK;
1632}
1633
1634static int
1635jme_set_macaddr(struct net_device *netdev, void *p)
1636{
1637 struct jme_adapter *jme = netdev_priv(netdev);
1638 struct sockaddr *addr = p;
1639 __u32 val;
1640
1641 if(netif_running(netdev))
1642 return -EBUSY;
1643
1644 spin_lock(&jme->macaddr_lock);
1645 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1646
1647 val = addr->sa_data[3] << 24 |
1648 addr->sa_data[2] << 16 |
1649 addr->sa_data[1] << 8 |
1650 addr->sa_data[0];
1651 jwrite32(jme, JME_RXUMA_LO, val);
1652 val = addr->sa_data[5] << 8 |
1653 addr->sa_data[4];
1654 jwrite32(jme, JME_RXUMA_HI, val);
1655 spin_unlock(&jme->macaddr_lock);
1656
1657 return 0;
1658}
1659
1660static void
1661jme_set_multi(struct net_device *netdev)
1662{
1663 struct jme_adapter *jme = netdev_priv(netdev);
1664 u32 mc_hash[2] = {};
1665 int i;
1666 unsigned long flags;
1667
1668 spin_lock_irqsave(&jme->rxmcs_lock, flags);
1669
1670 jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME;
1671
1672 if (netdev->flags & IFF_PROMISC) {
1673 jme->reg_rxmcs |= RXMCS_ALLFRAME;
1674 }
1675 else if (netdev->flags & IFF_ALLMULTI) {
1676 jme->reg_rxmcs |= RXMCS_ALLMULFRAME;
1677 }
1678 else if(netdev->flags & IFF_MULTICAST) {
1679 struct dev_mc_list *mclist;
1680 int bit_nr;
1681
1682 jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
1683 for (i = 0, mclist = netdev->mc_list;
1684 mclist && i < netdev->mc_count;
1685 ++i, mclist = mclist->next) {
1686
1687 bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x3F;
1688 mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
1689 }
1690
1691 jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
1692 jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]);
1693 }
1694
1695 wmb();
1696 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
1697
1698 spin_unlock_irqrestore(&jme->rxmcs_lock, flags);
1699}
1700
1701static int
1702jme_change_mtu(struct net_device *netdev, int new_mtu)
1703{
1704 struct jme_adapter *jme = netdev_priv(netdev);
1705
1706 if(new_mtu == jme->old_mtu)
1707 return 0;
1708
1709 if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) ||
1710 ((new_mtu) < IPV6_MIN_MTU))
1711 return -EINVAL;
1712
1713 if(new_mtu > 4000) {
1714 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
1715 jme->reg_rxcs |= RXCS_FIFOTHNP_64QW;
1716 jme_restart_rx_engine(jme);
1717 }
1718 else {
1719 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
1720 jme->reg_rxcs |= RXCS_FIFOTHNP_128QW;
1721 jme_restart_rx_engine(jme);
1722 }
1723
1724 if(new_mtu > 1900) {
1725 netdev->features &= ~NETIF_F_HW_CSUM;
1726 }
1727 else {
1728 netdev->features |= NETIF_F_HW_CSUM;
1729 }
1730
1731 netdev->mtu = new_mtu;
1732 jme_reset_link(jme);
1733
1734 return 0;
1735}
1736
1737static void
1738jme_tx_timeout(struct net_device *netdev)
1739{
1740 struct jme_adapter *jme = netdev_priv(netdev);
1741
1742 /*
1743 * Reset the link
1744 * And the link change will reinitiallize all RX/TX resources
1745 */
1746 jme->phylink = 0;
1747 jme_reset_link(jme);
1748}
1749
1750static void
1751jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
1752{
1753 struct jme_adapter *jme = netdev_priv(netdev);
1754
1755 jme->vlgrp = grp;
1756}
1757
1758static void
1759jme_get_drvinfo(struct net_device *netdev,
1760 struct ethtool_drvinfo *info)
1761{
1762 struct jme_adapter *jme = netdev_priv(netdev);
1763
1764 strcpy(info->driver, DRV_NAME);
1765 strcpy(info->version, DRV_VERSION);
1766 strcpy(info->bus_info, pci_name(jme->pdev));
1767}
1768
1769static int
1770jme_get_regs_len(struct net_device *netdev)
1771{
1772 return 0x400;
1773}
1774
1775static void
1776mmapio_memcpy(struct jme_adapter *jme, __u32 *p, __u32 reg, int len)
1777{
1778 int i;
1779
1780 for(i = 0 ; i < len ; i += 4)
1781 p[i >> 2] = jread32(jme, reg + i);
1782
1783}
1784
1785static void
1786jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
1787{
1788 struct jme_adapter *jme = netdev_priv(netdev);
1789 __u32 *p32 = (__u32*)p;
1790
1791 memset(p, 0, 0x400);
1792
1793 regs->version = 1;
1794 mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
1795
1796 p32 += 0x100 >> 2;
1797 mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
1798
1799 p32 += 0x100 >> 2;
1800 mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
1801
1802 p32 += 0x100 >> 2;
1803 mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
1804
1805}
1806
1807static int
1808jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
1809{
1810 struct jme_adapter *jme = netdev_priv(netdev);
1811
1812 ecmd->use_adaptive_rx_coalesce = true;
1813 ecmd->tx_coalesce_usecs = PCC_TX_TO;
1814 ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
1815
1816 switch(jme->dpi.cur) {
1817 case PCC_P1:
1818 ecmd->rx_coalesce_usecs = PCC_P1_TO;
1819 ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
1820 break;
1821 case PCC_P2:
1822 ecmd->rx_coalesce_usecs = PCC_P2_TO;
1823 ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
1824 break;
1825 case PCC_P3:
1826 ecmd->rx_coalesce_usecs = PCC_P3_TO;
1827 ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
1828 break;
1829 default:
1830 break;
1831 }
1832
1833 return 0;
1834}
1835
1836/*
1837 * It's not actually for coalesce.
1838 * It changes internell FIFO related setting for testing.
1839 */
1840static int
1841jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
1842{
1843 struct jme_adapter *jme = netdev_priv(netdev);
1844
1845 if(ecmd->use_adaptive_rx_coalesce &&
1846 ecmd->use_adaptive_tx_coalesce &&
1847 ecmd->rx_coalesce_usecs == 250 &&
1848 (ecmd->rx_max_coalesced_frames_low == 16 ||
1849 ecmd->rx_max_coalesced_frames_low == 32 ||
1850 ecmd->rx_max_coalesced_frames_low == 64 ||
1851 ecmd->rx_max_coalesced_frames_low == 128)) {
1852 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
1853 switch(ecmd->rx_max_coalesced_frames_low) {
1854 case 16:
1855 jme->reg_rxcs |= RXCS_FIFOTHNP_16QW;
1856 break;
1857 case 32:
1858 jme->reg_rxcs |= RXCS_FIFOTHNP_32QW;
1859 break;
1860 case 64:
1861 jme->reg_rxcs |= RXCS_FIFOTHNP_64QW;
1862 break;
1863 case 128:
1864 default:
1865 jme->reg_rxcs |= RXCS_FIFOTHNP_128QW;
1866 }
1867 jme_restart_rx_engine(jme);
1868 }
1869 else {
1870 return -EINVAL;
1871 }
1872
1873 return 0;
1874}
1875
1876static void
1877jme_get_pauseparam(struct net_device *netdev,
1878 struct ethtool_pauseparam *ecmd)
1879{
1880 struct jme_adapter *jme = netdev_priv(netdev);
1881 unsigned long flags;
1882 __u32 val;
1883
1884 ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
1885 ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
1886
1887 spin_lock_irqsave(&jme->phy_lock, flags);
1888 val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
1889 spin_unlock_irqrestore(&jme->phy_lock, flags);
1890 ecmd->autoneg = (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
1891}
1892
1893static int
1894jme_set_pauseparam(struct net_device *netdev,
1895 struct ethtool_pauseparam *ecmd)
1896{
1897 struct jme_adapter *jme = netdev_priv(netdev);
1898 unsigned long flags;
1899 __u32 val;
1900
1901 if( ((jme->reg_txpfc & TXPFC_PF_EN) != 0) !=
1902 (ecmd->tx_pause != 0)) {
1903
1904 if(ecmd->tx_pause)
1905 jme->reg_txpfc |= TXPFC_PF_EN;
1906 else
1907 jme->reg_txpfc &= ~TXPFC_PF_EN;
1908
1909 jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
1910 }
1911
1912 spin_lock_irqsave(&jme->rxmcs_lock, flags);
1913 if( ((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) !=
1914 (ecmd->rx_pause != 0)) {
1915
1916 if(ecmd->rx_pause)
1917 jme->reg_rxmcs |= RXMCS_FLOWCTRL;
1918 else
1919 jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
1920
1921 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
1922 }
1923 spin_unlock_irqrestore(&jme->rxmcs_lock, flags);
1924
1925 spin_lock_irqsave(&jme->phy_lock, flags);
1926 val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
1927 if( ((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) !=
1928 (ecmd->autoneg != 0)) {
1929
1930 if(ecmd->autoneg)
1931 val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
1932 else
1933 val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
1934
1935 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE, val);
1936 }
1937 spin_unlock_irqrestore(&jme->phy_lock, flags);
1938
1939 return 0;
1940}
1941
1942static void
1943jme_get_wol(struct net_device *netdev,
1944 struct ethtool_wolinfo *wol)
1945{
1946 struct jme_adapter *jme = netdev_priv(netdev);
1947
1948 wol->supported = WAKE_MAGIC | WAKE_PHY;
1949
1950 wol->wolopts = 0;
1951
1952 if(jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
1953 wol->wolopts |= WAKE_PHY;
1954
1955 if(jme->reg_pmcs & PMCS_MFEN)
1956 wol->wolopts |= WAKE_MAGIC;
1957
1958}
1959
1960static int
1961jme_set_wol(struct net_device *netdev,
1962 struct ethtool_wolinfo *wol)
1963{
1964 struct jme_adapter *jme = netdev_priv(netdev);
1965
1966 if(wol->wolopts & (WAKE_MAGICSECURE |
1967 WAKE_UCAST |
1968 WAKE_MCAST |
1969 WAKE_BCAST |
1970 WAKE_ARP))
1971 return -EOPNOTSUPP;
1972
1973 jme->reg_pmcs = 0;
1974
1975 if(wol->wolopts & WAKE_PHY)
1976 jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
1977
1978 if(wol->wolopts & WAKE_MAGIC)
1979 jme->reg_pmcs |= PMCS_MFEN;
1980
1981
1982 return 0;
1983}
1984
1985static int
1986jme_get_settings(struct net_device *netdev,
1987 struct ethtool_cmd *ecmd)
1988{
1989 struct jme_adapter *jme = netdev_priv(netdev);
1990 int rc;
1991 unsigned long flags;
1992
1993 spin_lock_irqsave(&jme->phy_lock, flags);
1994 rc = mii_ethtool_gset(&(jme->mii_if), ecmd);
1995 spin_unlock_irqrestore(&jme->phy_lock, flags);
1996 return rc;
1997}
1998
1999static int
2000jme_set_settings(struct net_device *netdev,
2001 struct ethtool_cmd *ecmd)
2002{
2003 struct jme_adapter *jme = netdev_priv(netdev);
2004 int rc, fdc=0;
2005 unsigned long flags;
2006
2007 if(ecmd->speed == SPEED_1000 && ecmd->autoneg != AUTONEG_ENABLE)
2008 return -EINVAL;
2009
2010 if(jme->mii_if.force_media &&
2011 ecmd->autoneg != AUTONEG_ENABLE &&
2012 (jme->mii_if.full_duplex != ecmd->duplex))
2013 fdc = 1;
2014
2015 spin_lock_irqsave(&jme->phy_lock, flags);
2016 rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
2017 spin_unlock_irqrestore(&jme->phy_lock, flags);
2018
2019 if(!rc && fdc)
2020 jme_reset_link(jme);
2021
2022 if(!rc) {
2023 jme->flags |= JME_FLAG_SSET;
2024 jme->old_ecmd = *ecmd;
2025 }
2026
2027 return rc;
2028}
2029
2030static __u32
2031jme_get_link(struct net_device *netdev)
2032{
2033 struct jme_adapter *jme = netdev_priv(netdev);
2034 return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
2035}
2036
2037static u32
2038jme_get_rx_csum(struct net_device *netdev)
2039{
2040 struct jme_adapter *jme = netdev_priv(netdev);
2041
2042 return jme->reg_rxmcs & RXMCS_CHECKSUM;
2043}
2044
2045static int
2046jme_set_rx_csum(struct net_device *netdev, u32 on)
2047{
2048 struct jme_adapter *jme = netdev_priv(netdev);
2049 unsigned long flags;
2050
2051 spin_lock_irqsave(&jme->rxmcs_lock, flags);
2052 if(on)
2053 jme->reg_rxmcs |= RXMCS_CHECKSUM;
2054 else
2055 jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
2056 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2057 spin_unlock_irqrestore(&jme->rxmcs_lock, flags);
2058
2059 return 0;
2060}
2061
2062static int
2063jme_set_tx_csum(struct net_device *netdev, u32 on)
2064{
2065 if(on && netdev->mtu <= 1900)
2066 netdev->features |= NETIF_F_HW_CSUM;
2067 else
2068 netdev->features &= ~NETIF_F_HW_CSUM;
2069
2070 return 0;
2071}
2072
2073static int
2074jme_nway_reset(struct net_device *netdev)
2075{
2076 struct jme_adapter *jme = netdev_priv(netdev);
2077 jme_restart_an(jme);
2078 return 0;
2079}
2080
2081static const struct ethtool_ops jme_ethtool_ops = {
2082 .get_drvinfo = jme_get_drvinfo,
2083 .get_regs_len = jme_get_regs_len,
2084 .get_regs = jme_get_regs,
2085 .get_coalesce = jme_get_coalesce,
2086 .set_coalesce = jme_set_coalesce,
2087 .get_pauseparam = jme_get_pauseparam,
2088 .set_pauseparam = jme_set_pauseparam,
2089 .get_wol = jme_get_wol,
2090 .set_wol = jme_set_wol,
2091 .get_settings = jme_get_settings,
2092 .set_settings = jme_set_settings,
2093 .get_link = jme_get_link,
2094 .get_rx_csum = jme_get_rx_csum,
2095 .set_rx_csum = jme_set_rx_csum,
2096 .set_tx_csum = jme_set_tx_csum,
2097 .nway_reset = jme_nway_reset,
2098};
2099
2100static int
2101jme_pci_dma64(struct pci_dev *pdev)
2102{
2103 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK))
2104 if(!pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
2105 dprintk("jme", "64Bit DMA Selected.\n");
2106 return 1;
2107 }
2108
2109 if (!pci_set_dma_mask(pdev, DMA_40BIT_MASK))
2110 if(!pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK)) {
2111 dprintk("jme", "40Bit DMA Selected.\n");
2112 return 1;
2113 }
2114
2115 if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
2116 if(!pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) {
2117 dprintk("jme", "32Bit DMA Selected.\n");
2118 return 0;
2119 }
2120
2121 return -1;
2122}
2123
2124__always_inline static void
2125jme_set_phy_ps(struct jme_adapter *jme)
2126{
2127 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, 0x00001000);
2128}
2129
2130static int __devinit
2131jme_init_one(struct pci_dev *pdev,
2132 const struct pci_device_id *ent)
2133{
2134 int rc = 0, using_dac;
2135 struct net_device *netdev;
2136 struct jme_adapter *jme;
2137
2138 /*
2139 * set up PCI device basics
2140 */
2141 rc = pci_enable_device(pdev);
2142 if(rc) {
2143 printk(KERN_ERR PFX "Cannot enable PCI device.\n");
2144 goto err_out;
2145 }
2146
2147 using_dac = jme_pci_dma64(pdev);
2148 if(using_dac < 0) {
2149 printk(KERN_ERR PFX "Cannot set PCI DMA Mask.\n");
2150 rc = -EIO;
2151 goto err_out_disable_pdev;
2152 }
2153
2154 if(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2155 printk(KERN_ERR PFX "No PCI resource region found.\n");
2156 rc = -ENOMEM;
2157 goto err_out_disable_pdev;
2158 }
2159
2160 rc = pci_request_regions(pdev, DRV_NAME);
2161 if(rc) {
2162 printk(KERN_ERR PFX "Cannot obtain PCI resource region.\n");
2163 goto err_out_disable_pdev;
2164 }
2165
2166 pci_set_master(pdev);
2167
2168 /*
2169 * alloc and init net device
2170 */
2171 netdev = alloc_etherdev(sizeof(*jme));
2172 if(!netdev) {
2173 printk(KERN_ERR PFX "Cannot allocate netdev structure.\n");
2174 rc = -ENOMEM;
2175 goto err_out_release_regions;
2176 }
2177 netdev->open = jme_open;
2178 netdev->stop = jme_close;
2179 netdev->hard_start_xmit = jme_start_xmit;
2180 netdev->set_mac_address = jme_set_macaddr;
2181 netdev->set_multicast_list = jme_set_multi;
2182 netdev->change_mtu = jme_change_mtu;
2183 netdev->ethtool_ops = &jme_ethtool_ops;
2184 netdev->tx_timeout = jme_tx_timeout;
2185 netdev->watchdog_timeo = TX_TIMEOUT;
2186 netdev->vlan_rx_register = jme_vlan_rx_register;
2187 NETDEV_GET_STATS(netdev, &jme_get_stats);
2188 netdev->features = NETIF_F_HW_CSUM |
2189 NETIF_F_HW_VLAN_TX |
2190 NETIF_F_HW_VLAN_RX;
2191 if(using_dac)
2192 netdev->features |= NETIF_F_HIGHDMA;
2193
2194 SET_NETDEV_DEV(netdev, &pdev->dev);
2195 pci_set_drvdata(pdev, netdev);
2196
2197 /*
2198 * init adapter info
2199 */
2200 jme = netdev_priv(netdev);
2201 jme->pdev = pdev;
2202 jme->dev = netdev;
2203 jme->old_mtu = netdev->mtu = 1500;
2204 jme->phylink = 0;
2205 jme->regs = ioremap(pci_resource_start(pdev, 0),
2206 pci_resource_len(pdev, 0));
2207 if (!(jme->regs)) {
2208 printk(KERN_ERR PFX "Mapping PCI resource region error.\n");
2209 rc = -ENOMEM;
2210 goto err_out_free_netdev;
2211 }
2212 jme->shadow_regs = pci_alloc_consistent(pdev,
2213 sizeof(__u32) * SHADOW_REG_NR,
2214 &(jme->shadow_dma));
2215 if (!(jme->shadow_regs)) {
2216 printk(KERN_ERR PFX "Allocating shadow register mapping error.\n");
2217 rc = -ENOMEM;
2218 goto err_out_unmap;
2219 }
2220
2221 spin_lock_init(&jme->phy_lock);
2222 spin_lock_init(&jme->macaddr_lock);
2223 spin_lock_init(&jme->rxmcs_lock);
2224
2225 atomic_set(&jme->link_changing, 1);
2226 atomic_set(&jme->rx_cleaning, 1);
2227 atomic_set(&jme->tx_cleaning, 1);
2228
2229 tasklet_init(&jme->pcc_task,
2230 &jme_pcc_tasklet,
2231 (unsigned long) jme);
2232 tasklet_init(&jme->linkch_task,
2233 &jme_link_change_tasklet,
2234 (unsigned long) jme);
2235 tasklet_init(&jme->txclean_task,
2236 &jme_tx_clean_tasklet,
2237 (unsigned long) jme);
2238 tasklet_init(&jme->rxclean_task,
2239 &jme_rx_clean_tasklet,
2240 (unsigned long) jme);
2241 tasklet_init(&jme->rxempty_task,
2242 &jme_rx_empty_tasklet,
2243 (unsigned long) jme);
2244 jme->mii_if.dev = netdev;
2245 jme->mii_if.phy_id = 1;
2246 jme->mii_if.supports_gmii = 1;
2247 jme->mii_if.mdio_read = jme_mdio_read;
2248 jme->mii_if.mdio_write = jme_mdio_write;
2249
2250 jme->dpi.cur = PCC_P1;
2251
2252 jme->reg_ghc = GHC_DPX | GHC_SPEED_1000M;
2253 jme->reg_rxcs = RXCS_DEFAULT;
2254 jme->reg_rxmcs = RXMCS_DEFAULT;
2255 jme->reg_txpfc = 0;
2256 jme->reg_pmcs = 0;
2257 /*
2258 * Get Max Read Req Size from PCI Config Space
2259 */
2260 pci_read_config_byte(pdev, PCI_CONF_DCSR_MRRS, &jme->mrrs);
2261 switch(jme->mrrs) {
2262 case MRRS_128B:
2263 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
2264 break;
2265 case MRRS_256B:
2266 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
2267 break;
2268 default:
2269 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
2270 break;
2271 };
2272
2273
2274 /*
2275 * Reset MAC processor and reload EEPROM for MAC Address
2276 */
2277 jme_clear_pm(jme);
2278 jme_set_phy_ps(jme);
2279 jme_phy_off(jme);
2280 jme_reset_mac_processor(jme);
2281 rc = jme_reload_eeprom(jme);
2282 if(rc) {
2283 printk(KERN_ERR PFX
2284 "Rload eeprom for reading MAC Address error.\n");
2285 goto err_out_free_shadow;
2286 }
2287 jme_load_macaddr(netdev);
2288
2289
2290 /*
2291 * Tell stack that we are not ready to work until open()
2292 */
2293 netif_carrier_off(netdev);
2294 netif_stop_queue(netdev);
2295
2296 /*
2297 * Register netdev
2298 */
2299 rc = register_netdev(netdev);
2300 if(rc) {
2301 printk(KERN_ERR PFX "Cannot register net device.\n");
2302 goto err_out_free_shadow;
2303 }
2304
2305 jprintk(netdev->name,
2306 "JMC250 gigabit eth %02x:%02x:%02x:%02x:%02x:%02x\n",
2307 netdev->dev_addr[0],
2308 netdev->dev_addr[1],
2309 netdev->dev_addr[2],
2310 netdev->dev_addr[3],
2311 netdev->dev_addr[4],
2312 netdev->dev_addr[5]);
2313
2314 return 0;
2315
2316err_out_free_shadow:
2317 pci_free_consistent(pdev,
2318 sizeof(__u32) * SHADOW_REG_NR,
2319 jme->shadow_regs,
2320 jme->shadow_dma);
2321err_out_unmap:
2322 iounmap(jme->regs);
2323err_out_free_netdev:
2324 pci_set_drvdata(pdev, NULL);
2325 free_netdev(netdev);
2326err_out_release_regions:
2327 pci_release_regions(pdev);
2328err_out_disable_pdev:
2329 pci_disable_device(pdev);
2330err_out:
2331 return rc;
2332}
2333
2334static void __devexit
2335jme_remove_one(struct pci_dev *pdev)
2336{
2337 struct net_device *netdev = pci_get_drvdata(pdev);
2338 struct jme_adapter *jme = netdev_priv(netdev);
2339
2340 unregister_netdev(netdev);
2341 pci_free_consistent(pdev,
2342 sizeof(__u32) * SHADOW_REG_NR,
2343 jme->shadow_regs,
2344 jme->shadow_dma);
2345 iounmap(jme->regs);
2346 pci_set_drvdata(pdev, NULL);
2347 free_netdev(netdev);
2348 pci_release_regions(pdev);
2349 pci_disable_device(pdev);
2350
2351}
2352
2353static int
2354jme_suspend(struct pci_dev *pdev, pm_message_t state)
2355{
2356 struct net_device *netdev = pci_get_drvdata(pdev);
2357 struct jme_adapter *jme = netdev_priv(netdev);
2358 int timeout = 100;
2359
2360 atomic_dec(&jme->link_changing);
2361
2362 netif_device_detach(netdev);
2363 netif_stop_queue(netdev);
2364 jme_stop_irq(jme);
2365 jme_free_irq(jme);
2366
2367 while(--timeout > 0 &&
2368 (
2369 atomic_read(&jme->rx_cleaning) != 1 ||
2370 atomic_read(&jme->tx_cleaning) != 1
2371 )) {
2372 mdelay(1);
2373 }
2374 if(!timeout) {
2375 jeprintk(netdev->name, "Waiting tasklets timeout.\n");
2376 return -EBUSY;
2377 }
2378 jme_disable_shadow(jme);
2379
2380 if(netif_carrier_ok(netdev)) {
2381 jme_stop_pcc_timer(jme);
2382 jme_reset_mac_processor(jme);
2383 jme_free_rx_resources(jme);
2384 jme_free_tx_resources(jme);
2385 netif_carrier_off(netdev);
2386 jme->phylink = 0;
2387 }
2388
2389
2390 pci_save_state(pdev);
2391 if(jme->reg_pmcs) {
2392 jme_set_100m_half(jme);
2393 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2394 pci_enable_wake(pdev, PCI_D3hot, true);
2395 pci_enable_wake(pdev, PCI_D3cold, true);
2396 }
2397 else {
2398 jme_phy_off(jme);
2399 pci_enable_wake(pdev, PCI_D3hot, false);
2400 pci_enable_wake(pdev, PCI_D3cold, false);
2401 }
2402 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2403
2404 return 0;
2405}
2406
2407static int
2408jme_resume(struct pci_dev *pdev)
2409{
2410 struct net_device *netdev = pci_get_drvdata(pdev);
2411 struct jme_adapter *jme = netdev_priv(netdev);
2412
2413 jme_clear_pm(jme);
2414 pci_restore_state(pdev);
2415
2416 if(jme->flags & JME_FLAG_SSET)
2417 jme_set_settings(netdev, &jme->old_ecmd);
2418 else
2419 jme_reset_phy_processor(jme);
2420
2421 jme_reset_mac_processor(jme);
2422 jme_enable_shadow(jme);
2423 jme_request_irq(jme);
2424 jme_start_irq(jme);
2425 netif_device_attach(netdev);
2426
2427 atomic_inc(&jme->link_changing);
2428
2429 jme_reset_link(jme);
2430
2431 return 0;
2432}
2433
2434static struct pci_device_id jme_pci_tbl[] = {
2435 { PCI_VDEVICE(JMICRON, 0x250) },
2436 { }
2437};
2438
2439static struct pci_driver jme_driver = {
2440 .name = DRV_NAME,
2441 .id_table = jme_pci_tbl,
2442 .probe = jme_init_one,
2443 .remove = __devexit_p(jme_remove_one),
2444#ifdef CONFIG_PM
2445 .suspend = jme_suspend,
2446 .resume = jme_resume,
2447#endif /* CONFIG_PM */
2448};
2449
2450static int __init
2451jme_init_module(void)
2452{
2453 printk(KERN_INFO PFX "JMicron JMC250 gigabit ethernet "
2454 "driver version %s\n", DRV_VERSION);
2455 return pci_register_driver(&jme_driver);
2456}
2457
2458static void __exit
2459jme_cleanup_module(void)
2460{
2461 pci_unregister_driver(&jme_driver);
2462}
2463
2464module_init(jme_init_module);
2465module_exit(jme_cleanup_module);
2466
2467MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
2468MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
2469MODULE_LICENSE("GPL");
2470MODULE_VERSION(DRV_VERSION);
2471MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
2472
JMicron Ethernet Linux driver