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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#include <linux/module.h>
25#include <linux/kernel.h>
26#include <linux/pci.h>
27#include <linux/netdevice.h>
28#include <linux/etherdevice.h>
29#include <linux/ethtool.h>
30#include <linux/mii.h>
31#include <linux/crc32.h>
32#include <linux/delay.h>
33#include <linux/spinlock.h>
34#include <linux/in.h>
35#include <linux/ip.h>
36#include <linux/ipv6.h>
37#include <linux/tcp.h>
38#include <linux/udp.h>
39#include <linux/if_vlan.h>
40#include <net/ip6_checksum.h>
41#include "jme.h"
42
43static int force_pseudohp = -1;
44static int no_pseudohp = -1;
45static int no_extplug = -1;
46module_param(force_pseudohp, int, 0);
47MODULE_PARM_DESC(force_pseudohp,
48 "Enable pseudo hot-plug feature manually by driver instead of BIOS.");
49module_param(no_pseudohp, int, 0);
50MODULE_PARM_DESC(no_pseudohp, "Disable pseudo hot-plug feature.");
51module_param(no_extplug, int, 0);
52MODULE_PARM_DESC(no_extplug,
53 "Do not use external plug signal for pseudo hot-plug.");
54
55static int
56jme_mdio_read(struct net_device *netdev, int phy, int reg)
57{
58 struct jme_adapter *jme = netdev_priv(netdev);
59 int i, val, again = (reg == MII_BMSR) ? 1 : 0;
60
61read_again:
62 jwrite32(jme, JME_SMI, SMI_OP_REQ |
63 smi_phy_addr(phy) |
64 smi_reg_addr(reg));
65
66 wmb();
67 for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
68 udelay(20);
69 val = jread32(jme, JME_SMI);
70 if ((val & SMI_OP_REQ) == 0)
71 break;
72 }
73
74 if (i == 0) {
75 jeprintk(jme->pdev, "phy(%d) read timeout : %d\n", phy, reg);
76 return 0;
77 }
78
79 if (again--)
80 goto read_again;
81
82 return (val & SMI_DATA_MASK) >> SMI_DATA_SHIFT;
83}
84
85static void
86jme_mdio_write(struct net_device *netdev,
87 int phy, int reg, int val)
88{
89 struct jme_adapter *jme = netdev_priv(netdev);
90 int i;
91
92 jwrite32(jme, JME_SMI, SMI_OP_WRITE | SMI_OP_REQ |
93 ((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) |
94 smi_phy_addr(phy) | smi_reg_addr(reg));
95
96 wmb();
97 for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
98 udelay(20);
99 if ((jread32(jme, JME_SMI) & SMI_OP_REQ) == 0)
100 break;
101 }
102
103 if (i == 0)
104 jeprintk(jme->pdev, "phy(%d) write timeout : %d\n", phy, reg);
105
106 return;
107}
108
109static inline void
110jme_reset_phy_processor(struct jme_adapter *jme)
111{
112 u32 val;
113
114 jme_mdio_write(jme->dev,
115 jme->mii_if.phy_id,
116 MII_ADVERTISE, ADVERTISE_ALL |
117 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
118
119 if (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
120 jme_mdio_write(jme->dev,
121 jme->mii_if.phy_id,
122 MII_CTRL1000,
123 ADVERTISE_1000FULL | ADVERTISE_1000HALF);
124
125 val = jme_mdio_read(jme->dev,
126 jme->mii_if.phy_id,
127 MII_BMCR);
128
129 jme_mdio_write(jme->dev,
130 jme->mii_if.phy_id,
131 MII_BMCR, val | BMCR_RESET);
132
133 return;
134}
135
136static void
137jme_setup_wakeup_frame(struct jme_adapter *jme,
138 u32 *mask, u32 crc, int fnr)
139{
140 int i;
141
142 /*
143 * Setup CRC pattern
144 */
145 jwrite32(jme, JME_WFOI, WFOI_CRC_SEL | (fnr & WFOI_FRAME_SEL));
146 wmb();
147 jwrite32(jme, JME_WFODP, crc);
148 wmb();
149
150 /*
151 * Setup Mask
152 */
153 for (i = 0 ; i < WAKEUP_FRAME_MASK_DWNR ; ++i) {
154 jwrite32(jme, JME_WFOI,
155 ((i << WFOI_MASK_SHIFT) & WFOI_MASK_SEL) |
156 (fnr & WFOI_FRAME_SEL));
157 wmb();
158 jwrite32(jme, JME_WFODP, mask[i]);
159 wmb();
160 }
161}
162
163static inline void
164jme_reset_mac_processor(struct jme_adapter *jme)
165{
166 u32 mask[WAKEUP_FRAME_MASK_DWNR] = {0, 0, 0, 0};
167 u32 crc = 0xCDCDCDCD;
168 u32 gpreg0;
169 int i;
170
171 jwrite32(jme, JME_GHC, jme->reg_ghc | GHC_SWRST);
172 udelay(2);
173 jwrite32(jme, JME_GHC, jme->reg_ghc);
174
175 jwrite32(jme, JME_RXDBA_LO, 0x00000000);
176 jwrite32(jme, JME_RXDBA_HI, 0x00000000);
177 jwrite32(jme, JME_RXQDC, 0x00000000);
178 jwrite32(jme, JME_RXNDA, 0x00000000);
179 jwrite32(jme, JME_TXDBA_LO, 0x00000000);
180 jwrite32(jme, JME_TXDBA_HI, 0x00000000);
181 jwrite32(jme, JME_TXQDC, 0x00000000);
182 jwrite32(jme, JME_TXNDA, 0x00000000);
183
184 jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
185 jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
186 for (i = 0 ; i < WAKEUP_FRAME_NR ; ++i)
187 jme_setup_wakeup_frame(jme, mask, crc, i);
188 if (jme->fpgaver)
189 gpreg0 = GPREG0_DEFAULT | GPREG0_LNKINTPOLL;
190 else
191 gpreg0 = GPREG0_DEFAULT;
192 jwrite32(jme, JME_GPREG0, gpreg0);
193 jwrite32(jme, JME_GPREG1, GPREG1_DEFAULT);
194}
195
196static inline void
197jme_reset_ghc_speed(struct jme_adapter *jme)
198{
199 jme->reg_ghc &= ~(GHC_SPEED_1000M | GHC_DPX);
200 jwrite32(jme, JME_GHC, jme->reg_ghc);
201}
202
203static inline void
204jme_clear_pm(struct jme_adapter *jme)
205{
206 jwrite32(jme, JME_PMCS, 0xFFFF0000 | jme->reg_pmcs);
207 pci_set_power_state(jme->pdev, PCI_D0);
208 pci_enable_wake(jme->pdev, PCI_D0, false);
209}
210
211static int
212jme_reload_eeprom(struct jme_adapter *jme)
213{
214 u32 val;
215 int i;
216
217 val = jread32(jme, JME_SMBCSR);
218
219 if (val & SMBCSR_EEPROMD) {
220 val |= SMBCSR_CNACK;
221 jwrite32(jme, JME_SMBCSR, val);
222 val |= SMBCSR_RELOAD;
223 jwrite32(jme, JME_SMBCSR, val);
224 mdelay(12);
225
226 for (i = JME_EEPROM_RELOAD_TIMEOUT; i > 0; --i) {
227 mdelay(1);
228 if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0)
229 break;
230 }
231
232 if (i == 0) {
233 jeprintk(jme->pdev, "eeprom reload timeout\n");
234 return -EIO;
235 }
236 }
237
238 return 0;
239}
240
241static void
242jme_load_macaddr(struct net_device *netdev)
243{
244 struct jme_adapter *jme = netdev_priv(netdev);
245 unsigned char macaddr[6];
246 u32 val;
247
248 spin_lock_bh(&jme->macaddr_lock);
249 val = jread32(jme, JME_RXUMA_LO);
250 macaddr[0] = (val >> 0) & 0xFF;
251 macaddr[1] = (val >> 8) & 0xFF;
252 macaddr[2] = (val >> 16) & 0xFF;
253 macaddr[3] = (val >> 24) & 0xFF;
254 val = jread32(jme, JME_RXUMA_HI);
255 macaddr[4] = (val >> 0) & 0xFF;
256 macaddr[5] = (val >> 8) & 0xFF;
257 memcpy(netdev->dev_addr, macaddr, 6);
258 spin_unlock_bh(&jme->macaddr_lock);
259}
260
261static inline void
262jme_set_rx_pcc(struct jme_adapter *jme, int p)
263{
264 switch (p) {
265 case PCC_OFF:
266 jwrite32(jme, JME_PCCRX0,
267 ((PCC_OFF_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
268 ((PCC_OFF_CNT << PCCRX_SHIFT) & PCCRX_MASK));
269 break;
270 case PCC_P1:
271 jwrite32(jme, JME_PCCRX0,
272 ((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
273 ((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK));
274 break;
275 case PCC_P2:
276 jwrite32(jme, JME_PCCRX0,
277 ((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
278 ((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK));
279 break;
280 case PCC_P3:
281 jwrite32(jme, JME_PCCRX0,
282 ((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
283 ((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK));
284 break;
285 default:
286 break;
287 }
288 wmb();
289
290 if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
291 msg_rx_status(jme, "Switched to PCC_P%d\n", p);
292}
293
294static void
295jme_start_irq(struct jme_adapter *jme)
296{
297 register struct dynpcc_info *dpi = &(jme->dpi);
298
299 jme_set_rx_pcc(jme, PCC_P1);
300 dpi->cur = PCC_P1;
301 dpi->attempt = PCC_P1;
302 dpi->cnt = 0;
303
304 jwrite32(jme, JME_PCCTX,
305 ((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
306 ((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) |
307 PCCTXQ0_EN
308 );
309
310 /*
311 * Enable Interrupts
312 */
313 jwrite32(jme, JME_IENS, INTR_ENABLE);
314}
315
316static inline void
317jme_stop_irq(struct jme_adapter *jme)
318{
319 /*
320 * Disable Interrupts
321 */
322 jwrite32f(jme, JME_IENC, INTR_ENABLE);
323}
324
325static inline void
326jme_enable_shadow(struct jme_adapter *jme)
327{
328 jwrite32(jme,
329 JME_SHBA_LO,
330 ((u32)jme->shadow_dma & ~((u32)0x1F)) | SHBA_POSTEN);
331}
332
333static inline void
334jme_disable_shadow(struct jme_adapter *jme)
335{
336 jwrite32(jme, JME_SHBA_LO, 0x0);
337}
338
339static u32
340jme_linkstat_from_phy(struct jme_adapter *jme)
341{
342 u32 phylink, bmsr;
343
344 phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17);
345 bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR);
346 if (bmsr & BMSR_ANCOMP)
347 phylink |= PHY_LINK_AUTONEG_COMPLETE;
348
349 return phylink;
350}
351
352static inline void
353jme_set_phyfifoa(struct jme_adapter *jme)
354{
355 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004);
356}
357
358static inline void
359jme_set_phyfifob(struct jme_adapter *jme)
360{
361 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000);
362}
363
364static int
365jme_check_link(struct net_device *netdev, int testonly)
366{
367 struct jme_adapter *jme = netdev_priv(netdev);
368 u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT, bmcr, gpreg1;
369 char linkmsg[64];
370 int rc = 0;
371
372 linkmsg[0] = '\0';
373
374 if (jme->fpgaver)
375 phylink = jme_linkstat_from_phy(jme);
376 else
377 phylink = jread32(jme, JME_PHY_LINK);
378
379 if (phylink & PHY_LINK_UP) {
380 if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
381 /*
382 * If we did not enable AN
383 * Speed/Duplex Info should be obtained from SMI
384 */
385 phylink = PHY_LINK_UP;
386
387 bmcr = jme_mdio_read(jme->dev,
388 jme->mii_if.phy_id,
389 MII_BMCR);
390
391 phylink |= ((bmcr & BMCR_SPEED1000) &&
392 (bmcr & BMCR_SPEED100) == 0) ?
393 PHY_LINK_SPEED_1000M :
394 (bmcr & BMCR_SPEED100) ?
395 PHY_LINK_SPEED_100M :
396 PHY_LINK_SPEED_10M;
397
398 phylink |= (bmcr & BMCR_FULLDPLX) ?
399 PHY_LINK_DUPLEX : 0;
400
401 strcat(linkmsg, "Forced: ");
402 } else {
403 /*
404 * Keep polling for speed/duplex resolve complete
405 */
406 while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
407 --cnt) {
408
409 udelay(1);
410
411 if (jme->fpgaver)
412 phylink = jme_linkstat_from_phy(jme);
413 else
414 phylink = jread32(jme, JME_PHY_LINK);
415 }
416 if (!cnt)
417 jeprintk(jme->pdev,
418 "Waiting speed resolve timeout.\n");
419
420 strcat(linkmsg, "ANed: ");
421 }
422
423 if (jme->phylink == phylink) {
424 rc = 1;
425 goto out;
426 }
427 if (testonly)
428 goto out;
429
430 jme->phylink = phylink;
431
432 ghc = jme->reg_ghc & ~(GHC_SPEED | GHC_DPX |
433 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE |
434 GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY);
435 switch (phylink & PHY_LINK_SPEED_MASK) {
436 case PHY_LINK_SPEED_10M:
437 ghc |= GHC_SPEED_10M |
438 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
439 strcat(linkmsg, "10 Mbps, ");
440 break;
441 case PHY_LINK_SPEED_100M:
442 ghc |= GHC_SPEED_100M |
443 GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
444 strcat(linkmsg, "100 Mbps, ");
445 break;
446 case PHY_LINK_SPEED_1000M:
447 ghc |= GHC_SPEED_1000M |
448 GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY;
449 strcat(linkmsg, "1000 Mbps, ");
450 break;
451 default:
452 break;
453 }
454
455 if (phylink & PHY_LINK_DUPLEX) {
456 jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
457 ghc |= GHC_DPX;
458 } else {
459 jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
460 TXMCS_BACKOFF |
461 TXMCS_CARRIERSENSE |
462 TXMCS_COLLISION);
463 jwrite32(jme, JME_TXTRHD, TXTRHD_TXPEN |
464 ((0x2000 << TXTRHD_TXP_SHIFT) & TXTRHD_TXP) |
465 TXTRHD_TXREN |
466 ((8 << TXTRHD_TXRL_SHIFT) & TXTRHD_TXRL));
467 }
468
469 gpreg1 = GPREG1_DEFAULT;
470 if (is_buggy250(jme->pdev->device, jme->chiprev)) {
471 if (!(phylink & PHY_LINK_DUPLEX))
472 gpreg1 |= GPREG1_HALFMODEPATCH;
473 switch (phylink & PHY_LINK_SPEED_MASK) {
474 case PHY_LINK_SPEED_10M:
475 jme_set_phyfifoa(jme);
476 gpreg1 |= GPREG1_RSSPATCH;
477 break;
478 case PHY_LINK_SPEED_100M:
479 jme_set_phyfifob(jme);
480 gpreg1 |= GPREG1_RSSPATCH;
481 break;
482 case PHY_LINK_SPEED_1000M:
483 jme_set_phyfifoa(jme);
484 break;
485 default:
486 break;
487 }
488 }
489
490 jwrite32(jme, JME_GPREG1, gpreg1);
491 jwrite32(jme, JME_GHC, ghc);
492 jme->reg_ghc = ghc;
493
494 strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
495 "Full-Duplex, " :
496 "Half-Duplex, ");
497 strcat(linkmsg, (phylink & PHY_LINK_MDI_STAT) ?
498 "MDI-X" :
499 "MDI");
500 msg_link(jme, "Link is up at %s.\n", linkmsg);
501 netif_carrier_on(netdev);
502 } else {
503 if (testonly)
504 goto out;
505
506 msg_link(jme, "Link is down.\n");
507 jme->phylink = 0;
508 netif_carrier_off(netdev);
509 }
510
511out:
512 return rc;
513}
514
515static int
516jme_setup_tx_resources(struct jme_adapter *jme)
517{
518 struct jme_ring *txring = &(jme->txring[0]);
519
520 txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
521 TX_RING_ALLOC_SIZE(jme->tx_ring_size),
522 &(txring->dmaalloc),
523 GFP_ATOMIC);
524
525 if (!txring->alloc) {
526 txring->desc = NULL;
527 txring->dmaalloc = 0;
528 txring->dma = 0;
529 return -ENOMEM;
530 }
531
532 /*
533 * 16 Bytes align
534 */
535 txring->desc = (void *)ALIGN((unsigned long)(txring->alloc),
536 RING_DESC_ALIGN);
537 txring->dma = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
538 txring->next_to_use = 0;
539 atomic_set(&txring->next_to_clean, 0);
540 atomic_set(&txring->nr_free, jme->tx_ring_size);
541
542 /*
543 * Initialize Transmit Descriptors
544 */
545 memset(txring->alloc, 0, TX_RING_ALLOC_SIZE(jme->tx_ring_size));
546 memset(txring->bufinf, 0,
547 sizeof(struct jme_buffer_info) * jme->tx_ring_size);
548
549 return 0;
550}
551
552static void
553jme_free_tx_resources(struct jme_adapter *jme)
554{
555 int i;
556 struct jme_ring *txring = &(jme->txring[0]);
557 struct jme_buffer_info *txbi = txring->bufinf;
558
559 if (txring->alloc) {
560 for (i = 0 ; i < jme->tx_ring_size ; ++i) {
561 txbi = txring->bufinf + i;
562 if (txbi->skb) {
563 dev_kfree_skb(txbi->skb);
564 txbi->skb = NULL;
565 }
566 txbi->mapping = 0;
567 txbi->len = 0;
568 txbi->nr_desc = 0;
569 txbi->start_xmit = 0;
570 }
571
572 dma_free_coherent(&(jme->pdev->dev),
573 TX_RING_ALLOC_SIZE(jme->tx_ring_size),
574 txring->alloc,
575 txring->dmaalloc);
576
577 txring->alloc = NULL;
578 txring->desc = NULL;
579 txring->dmaalloc = 0;
580 txring->dma = 0;
581 }
582 txring->next_to_use = 0;
583 atomic_set(&txring->next_to_clean, 0);
584 atomic_set(&txring->nr_free, 0);
585
586}
587
588static inline void
589jme_enable_tx_engine(struct jme_adapter *jme)
590{
591 /*
592 * Select Queue 0
593 */
594 jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
595 wmb();
596
597 /*
598 * Setup TX Queue 0 DMA Bass Address
599 */
600 jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
601 jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
602 jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
603
604 /*
605 * Setup TX Descptor Count
606 */
607 jwrite32(jme, JME_TXQDC, jme->tx_ring_size);
608
609 /*
610 * Enable TX Engine
611 */
612 wmb();
613 jwrite32(jme, JME_TXCS, jme->reg_txcs |
614 TXCS_SELECT_QUEUE0 |
615 TXCS_ENABLE);
616
617}
618
619static inline void
620jme_restart_tx_engine(struct jme_adapter *jme)
621{
622 /*
623 * Restart TX Engine
624 */
625 jwrite32(jme, JME_TXCS, jme->reg_txcs |
626 TXCS_SELECT_QUEUE0 |
627 TXCS_ENABLE);
628}
629
630static inline void
631jme_disable_tx_engine(struct jme_adapter *jme)
632{
633 int i;
634 u32 val;
635
636 /*
637 * Disable TX Engine
638 */
639 jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
640 wmb();
641
642 val = jread32(jme, JME_TXCS);
643 for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) {
644 mdelay(1);
645 val = jread32(jme, JME_TXCS);
646 rmb();
647 }
648
649 if (!i)
650 jeprintk(jme->pdev, "Disable TX engine timeout.\n");
651}
652
653static void
654jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
655{
656 struct jme_ring *rxring = jme->rxring;
657 register struct rxdesc *rxdesc = rxring->desc;
658 struct jme_buffer_info *rxbi = rxring->bufinf;
659 rxdesc += i;
660 rxbi += i;
661
662 rxdesc->dw[0] = 0;
663 rxdesc->dw[1] = 0;
664 rxdesc->desc1.bufaddrh = cpu_to_le32((__u64)rxbi->mapping >> 32);
665 rxdesc->desc1.bufaddrl = cpu_to_le32(
666 (__u64)rxbi->mapping & 0xFFFFFFFFUL);
667 rxdesc->desc1.datalen = cpu_to_le16(rxbi->len);
668 if (jme->dev->features & NETIF_F_HIGHDMA)
669 rxdesc->desc1.flags = RXFLAG_64BIT;
670 wmb();
671 rxdesc->desc1.flags |= RXFLAG_OWN | RXFLAG_INT;
672}
673
674static int
675jme_make_new_rx_buf(struct jme_adapter *jme, int i)
676{
677 struct jme_ring *rxring = &(jme->rxring[0]);
678 struct jme_buffer_info *rxbi = rxring->bufinf + i;
679 struct sk_buff *skb;
680
681 skb = netdev_alloc_skb(jme->dev,
682 jme->dev->mtu + RX_EXTRA_LEN);
683 if (unlikely(!skb))
684 return -ENOMEM;
685
686 rxbi->skb = skb;
687 rxbi->len = skb_tailroom(skb);
688 rxbi->mapping = pci_map_page(jme->pdev,
689 virt_to_page(skb->data),
690 offset_in_page(skb->data),
691 rxbi->len,
692 PCI_DMA_FROMDEVICE);
693
694 return 0;
695}
696
697static void
698jme_free_rx_buf(struct jme_adapter *jme, int i)
699{
700 struct jme_ring *rxring = &(jme->rxring[0]);
701 struct jme_buffer_info *rxbi = rxring->bufinf;
702 rxbi += i;
703
704 if (rxbi->skb) {
705 pci_unmap_page(jme->pdev,
706 rxbi->mapping,
707 rxbi->len,
708 PCI_DMA_FROMDEVICE);
709 dev_kfree_skb(rxbi->skb);
710 rxbi->skb = NULL;
711 rxbi->mapping = 0;
712 rxbi->len = 0;
713 }
714}
715
716static void
717jme_free_rx_resources(struct jme_adapter *jme)
718{
719 int i;
720 struct jme_ring *rxring = &(jme->rxring[0]);
721
722 if (rxring->alloc) {
723 for (i = 0 ; i < jme->rx_ring_size ; ++i)
724 jme_free_rx_buf(jme, i);
725
726 dma_free_coherent(&(jme->pdev->dev),
727 RX_RING_ALLOC_SIZE(jme->rx_ring_size),
728 rxring->alloc,
729 rxring->dmaalloc);
730 rxring->alloc = NULL;
731 rxring->desc = NULL;
732 rxring->dmaalloc = 0;
733 rxring->dma = 0;
734 }
735 rxring->next_to_use = 0;
736 atomic_set(&rxring->next_to_clean, 0);
737}
738
739static int
740jme_setup_rx_resources(struct jme_adapter *jme)
741{
742 int i;
743 struct jme_ring *rxring = &(jme->rxring[0]);
744
745 rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
746 RX_RING_ALLOC_SIZE(jme->rx_ring_size),
747 &(rxring->dmaalloc),
748 GFP_ATOMIC);
749 if (!rxring->alloc) {
750 rxring->desc = NULL;
751 rxring->dmaalloc = 0;
752 rxring->dma = 0;
753 return -ENOMEM;
754 }
755
756 /*
757 * 16 Bytes align
758 */
759 rxring->desc = (void *)ALIGN((unsigned long)(rxring->alloc),
760 RING_DESC_ALIGN);
761 rxring->dma = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
762 rxring->next_to_use = 0;
763 atomic_set(&rxring->next_to_clean, 0);
764
765 /*
766 * Initiallize Receive Descriptors
767 */
768 for (i = 0 ; i < jme->rx_ring_size ; ++i) {
769 if (unlikely(jme_make_new_rx_buf(jme, i))) {
770 jme_free_rx_resources(jme);
771 return -ENOMEM;
772 }
773
774 jme_set_clean_rxdesc(jme, i);
775 }
776
777 return 0;
778}
779
780static inline void
781jme_enable_rx_engine(struct jme_adapter *jme)
782{
783 /*
784 * Select Queue 0
785 */
786 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
787 RXCS_QUEUESEL_Q0);
788 wmb();
789
790 /*
791 * Setup RX DMA Bass Address
792 */
793 jwrite32(jme, JME_RXDBA_LO, (__u64)jme->rxring[0].dma & 0xFFFFFFFFUL);
794 jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
795 jwrite32(jme, JME_RXNDA, (__u64)jme->rxring[0].dma & 0xFFFFFFFFUL);
796
797 /*
798 * Setup RX Descriptor Count
799 */
800 jwrite32(jme, JME_RXQDC, jme->rx_ring_size);
801
802 /*
803 * Setup Unicast Filter
804 */
805 jme_set_multi(jme->dev);
806
807 /*
808 * Enable RX Engine
809 */
810 wmb();
811 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
812 RXCS_QUEUESEL_Q0 |
813 RXCS_ENABLE |
814 RXCS_QST);
815}
816
817static inline void
818jme_restart_rx_engine(struct jme_adapter *jme)
819{
820 /*
821 * Start RX Engine
822 */
823 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
824 RXCS_QUEUESEL_Q0 |
825 RXCS_ENABLE |
826 RXCS_QST);
827}
828
829static inline void
830jme_disable_rx_engine(struct jme_adapter *jme)
831{
832 int i;
833 u32 val;
834
835 /*
836 * Disable RX Engine
837 */
838 jwrite32(jme, JME_RXCS, jme->reg_rxcs);
839 wmb();
840
841 val = jread32(jme, JME_RXCS);
842 for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) {
843 mdelay(1);
844 val = jread32(jme, JME_RXCS);
845 rmb();
846 }
847
848 if (!i)
849 jeprintk(jme->pdev, "Disable RX engine timeout.\n");
850
851}
852
853static int
854jme_rxsum_ok(struct jme_adapter *jme, u16 flags)
855{
856 if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
857 return false;
858
859 if (unlikely(!(flags & RXWBFLAG_MF) &&
860 (flags & RXWBFLAG_TCPON) && !(flags & RXWBFLAG_TCPCS))) {
861 msg_rx_err(jme, "TCP Checksum error.\n");
862 goto out_sumerr;
863 }
864
865 if (unlikely(!(flags & RXWBFLAG_MF) &&
866 (flags & RXWBFLAG_UDPON) && !(flags & RXWBFLAG_UDPCS))) {
867 msg_rx_err(jme, "UDP Checksum error.\n");
868 goto out_sumerr;
869 }
870
871 if (unlikely((flags & RXWBFLAG_IPV4) && !(flags & RXWBFLAG_IPCS))) {
872 msg_rx_err(jme, "IPv4 Checksum error.\n");
873 goto out_sumerr;
874 }
875
876 return true;
877
878out_sumerr:
879 return false;
880}
881
882static void
883jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
884{
885 struct jme_ring *rxring = &(jme->rxring[0]);
886 struct rxdesc *rxdesc = rxring->desc;
887 struct jme_buffer_info *rxbi = rxring->bufinf;
888 struct sk_buff *skb;
889 int framesize;
890
891 rxdesc += idx;
892 rxbi += idx;
893
894 skb = rxbi->skb;
895 pci_dma_sync_single_for_cpu(jme->pdev,
896 rxbi->mapping,
897 rxbi->len,
898 PCI_DMA_FROMDEVICE);
899
900 if (unlikely(jme_make_new_rx_buf(jme, idx))) {
901 pci_dma_sync_single_for_device(jme->pdev,
902 rxbi->mapping,
903 rxbi->len,
904 PCI_DMA_FROMDEVICE);
905
906 ++(NET_STAT(jme).rx_dropped);
907 } else {
908 framesize = le16_to_cpu(rxdesc->descwb.framesize)
909 - RX_PREPAD_SIZE;
910
911 skb_reserve(skb, RX_PREPAD_SIZE);
912 skb_put(skb, framesize);
913 skb->protocol = eth_type_trans(skb, jme->dev);
914
915 if (jme_rxsum_ok(jme, le16_to_cpu(rxdesc->descwb.flags)))
916 skb->ip_summed = CHECKSUM_UNNECESSARY;
917 else
918 skb->ip_summed = CHECKSUM_NONE;
919
920 if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
921 if (jme->vlgrp) {
922 jme->jme_vlan_rx(skb, jme->vlgrp,
923 le16_to_cpu(rxdesc->descwb.vlan));
924 NET_STAT(jme).rx_bytes += 4;
925 }
926 } else {
927 jme->jme_rx(skb);
928 }
929
930 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
931 cpu_to_le16(RXWBFLAG_DEST_MUL))
932 ++(NET_STAT(jme).multicast);
933
934 NET_STAT(jme).rx_bytes += framesize;
935 ++(NET_STAT(jme).rx_packets);
936 }
937
938 jme_set_clean_rxdesc(jme, idx);
939
940}
941
942static int
943jme_process_receive(struct jme_adapter *jme, int limit)
944{
945 struct jme_ring *rxring = &(jme->rxring[0]);
946 struct rxdesc *rxdesc = rxring->desc;
947 int i, j, ccnt, desccnt, mask = jme->rx_ring_mask;
948
949 if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
950 goto out_inc;
951
952 if (unlikely(atomic_read(&jme->link_changing) != 1))
953 goto out_inc;
954
955 if (unlikely(!netif_carrier_ok(jme->dev)))
956 goto out_inc;
957
958 i = atomic_read(&rxring->next_to_clean);
959 while (limit-- > 0) {
960 rxdesc = rxring->desc;
961 rxdesc += i;
962
963 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_OWN)) ||
964 !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
965 goto out;
966
967 desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
968
969 if (unlikely(desccnt > 1 ||
970 rxdesc->descwb.errstat & RXWBERR_ALLERR)) {
971
972 if (rxdesc->descwb.errstat & RXWBERR_CRCERR)
973 ++(NET_STAT(jme).rx_crc_errors);
974 else if (rxdesc->descwb.errstat & RXWBERR_OVERUN)
975 ++(NET_STAT(jme).rx_fifo_errors);
976 else
977 ++(NET_STAT(jme).rx_errors);
978
979 if (desccnt > 1)
980 limit -= desccnt - 1;
981
982 for (j = i, ccnt = desccnt ; ccnt-- ; ) {
983 jme_set_clean_rxdesc(jme, j);
984 j = (j + 1) & (mask);
985 }
986
987 } else {
988 jme_alloc_and_feed_skb(jme, i);
989 }
990
991 i = (i + desccnt) & (mask);
992 }
993
994out:
995 atomic_set(&rxring->next_to_clean, i);
996
997out_inc:
998 atomic_inc(&jme->rx_cleaning);
999
1000 return limit > 0 ? limit : 0;
1001
1002}
1003
1004static void
1005jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
1006{
1007 if (likely(atmp == dpi->cur)) {
1008 dpi->cnt = 0;
1009 return;
1010 }
1011
1012 if (dpi->attempt == atmp) {
1013 ++(dpi->cnt);
1014 } else {
1015 dpi->attempt = atmp;
1016 dpi->cnt = 0;
1017 }
1018
1019}
1020
1021static void
1022jme_dynamic_pcc(struct jme_adapter *jme)
1023{
1024 register struct dynpcc_info *dpi = &(jme->dpi);
1025
1026 if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
1027 jme_attempt_pcc(dpi, PCC_P3);
1028 else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD
1029 || dpi->intr_cnt > PCC_INTR_THRESHOLD)
1030 jme_attempt_pcc(dpi, PCC_P2);
1031 else
1032 jme_attempt_pcc(dpi, PCC_P1);
1033
1034 if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
1035 if (dpi->attempt < dpi->cur)
1036 tasklet_schedule(&jme->rxclean_task);
1037 jme_set_rx_pcc(jme, dpi->attempt);
1038 dpi->cur = dpi->attempt;
1039 dpi->cnt = 0;
1040 }
1041}
1042
1043static void
1044jme_start_pcc_timer(struct jme_adapter *jme)
1045{
1046 struct dynpcc_info *dpi = &(jme->dpi);
1047 dpi->last_bytes = NET_STAT(jme).rx_bytes;
1048 dpi->last_pkts = NET_STAT(jme).rx_packets;
1049 dpi->intr_cnt = 0;
1050 jwrite32(jme, JME_TMCSR,
1051 TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
1052}
1053
1054static inline void
1055jme_stop_pcc_timer(struct jme_adapter *jme)
1056{
1057 jwrite32(jme, JME_TMCSR, 0);
1058}
1059
1060static void
1061jme_shutdown_nic(struct jme_adapter *jme)
1062{
1063 u32 phylink;
1064
1065 phylink = jme_linkstat_from_phy(jme);
1066
1067 if (!(phylink & PHY_LINK_UP)) {
1068 /*
1069 * Disable all interrupt before issue timer
1070 */
1071 jme_stop_irq(jme);
1072 jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE);
1073 }
1074}
1075
1076static void
1077jme_pcc_tasklet(unsigned long arg)
1078{
1079 struct jme_adapter *jme = (struct jme_adapter *)arg;
1080 struct net_device *netdev = jme->dev;
1081
1082 if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) {
1083 jme_shutdown_nic(jme);
1084 return;
1085 }
1086
1087 if (unlikely(!netif_carrier_ok(netdev) ||
1088 (atomic_read(&jme->link_changing) != 1)
1089 )) {
1090 jme_stop_pcc_timer(jme);
1091 return;
1092 }
1093
1094 if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
1095 jme_dynamic_pcc(jme);
1096
1097 jme_start_pcc_timer(jme);
1098}
1099
1100static inline void
1101jme_polling_mode(struct jme_adapter *jme)
1102{
1103 jme_set_rx_pcc(jme, PCC_OFF);
1104}
1105
1106static inline void
1107jme_interrupt_mode(struct jme_adapter *jme)
1108{
1109 jme_set_rx_pcc(jme, PCC_P1);
1110}
1111
1112static inline int
1113jme_pseudo_hotplug_enabled(struct jme_adapter *jme)
1114{
1115 u32 apmc;
1116 apmc = jread32(jme, JME_APMC);
1117 return apmc & JME_APMC_PSEUDO_HP_EN;
1118}
1119
1120static void
1121jme_start_shutdown_timer(struct jme_adapter *jme)
1122{
1123 u32 apmc;
1124
1125 apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN;
1126 apmc &= ~JME_APMC_EPIEN_CTRL;
1127 if (!no_extplug) {
1128 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN);
1129 wmb();
1130 }
1131 jwrite32f(jme, JME_APMC, apmc);
1132
1133 jwrite32f(jme, JME_TIMER2, 0);
1134 set_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1135 jwrite32(jme, JME_TMCSR,
1136 TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT));
1137}
1138
1139static void
1140jme_stop_shutdown_timer(struct jme_adapter *jme)
1141{
1142 u32 apmc;
1143
1144 jwrite32f(jme, JME_TMCSR, 0);
1145 jwrite32f(jme, JME_TIMER2, 0);
1146 clear_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1147
1148 apmc = jread32(jme, JME_APMC);
1149 apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL);
1150 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS);
1151 wmb();
1152 jwrite32f(jme, JME_APMC, apmc);
1153}
1154
1155static void
1156jme_link_change_tasklet(unsigned long arg)
1157{
1158 struct jme_adapter *jme = (struct jme_adapter *)arg;
1159 struct net_device *netdev = jme->dev;
1160 int rc;
1161
1162 while (!atomic_dec_and_test(&jme->link_changing)) {
1163 atomic_inc(&jme->link_changing);
1164 msg_intr(jme, "Get link change lock failed.\n");
1165 while (atomic_read(&jme->link_changing) != 1)
1166 msg_intr(jme, "Waiting link change lock.\n");
1167 }
1168
1169 if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
1170 goto out;
1171
1172 jme->old_mtu = netdev->mtu;
1173 netif_stop_queue(netdev);
1174 if (jme_pseudo_hotplug_enabled(jme))
1175 jme_stop_shutdown_timer(jme);
1176
1177 jme_stop_pcc_timer(jme);
1178 tasklet_disable(&jme->txclean_task);
1179 tasklet_disable(&jme->rxclean_task);
1180 tasklet_disable(&jme->rxempty_task);
1181
1182 if (netif_carrier_ok(netdev)) {
1183 jme_reset_ghc_speed(jme);
1184 jme_disable_rx_engine(jme);
1185 jme_disable_tx_engine(jme);
1186 jme_reset_mac_processor(jme);
1187 jme_free_rx_resources(jme);
1188 jme_free_tx_resources(jme);
1189
1190 if (test_bit(JME_FLAG_POLL, &jme->flags))
1191 jme_polling_mode(jme);
1192
1193 netif_carrier_off(netdev);
1194 }
1195
1196 jme_check_link(netdev, 0);
1197 if (netif_carrier_ok(netdev)) {
1198 rc = jme_setup_rx_resources(jme);
1199 if (rc) {
1200 jeprintk(jme->pdev, "Allocating resources for RX error"
1201 ", Device STOPPED!\n");
1202 goto out_enable_tasklet;
1203 }
1204
1205 rc = jme_setup_tx_resources(jme);
1206 if (rc) {
1207 jeprintk(jme->pdev, "Allocating resources for TX error"
1208 ", Device STOPPED!\n");
1209 goto err_out_free_rx_resources;
1210 }
1211
1212 jme_enable_rx_engine(jme);
1213 jme_enable_tx_engine(jme);
1214
1215 netif_start_queue(netdev);
1216
1217 if (test_bit(JME_FLAG_POLL, &jme->flags))
1218 jme_interrupt_mode(jme);
1219
1220 jme_start_pcc_timer(jme);
1221 } else if (jme_pseudo_hotplug_enabled(jme)) {
1222 jme_start_shutdown_timer(jme);
1223 }
1224
1225 goto out_enable_tasklet;
1226
1227err_out_free_rx_resources:
1228 jme_free_rx_resources(jme);
1229out_enable_tasklet:
1230 tasklet_enable(&jme->txclean_task);
1231 tasklet_hi_enable(&jme->rxclean_task);
1232 tasklet_hi_enable(&jme->rxempty_task);
1233out:
1234 atomic_inc(&jme->link_changing);
1235}
1236
1237static void
1238jme_rx_clean_tasklet(unsigned long arg)
1239{
1240 struct jme_adapter *jme = (struct jme_adapter *)arg;
1241 struct dynpcc_info *dpi = &(jme->dpi);
1242
1243 jme_process_receive(jme, jme->rx_ring_size);
1244 ++(dpi->intr_cnt);
1245
1246}
1247
1248static int
1249jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
1250{
1251 struct jme_adapter *jme = jme_napi_priv(holder);
1252 int rest;
1253
1254 rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
1255
1256 while (atomic_read(&jme->rx_empty) > 0) {
1257 atomic_dec(&jme->rx_empty);
1258 ++(NET_STAT(jme).rx_dropped);
1259 jme_restart_rx_engine(jme);
1260 }
1261 atomic_inc(&jme->rx_empty);
1262
1263 if (rest) {
1264 JME_RX_COMPLETE(netdev, holder);
1265 jme_interrupt_mode(jme);
1266 }
1267
1268 JME_NAPI_WEIGHT_SET(budget, rest);
1269 return JME_NAPI_WEIGHT_VAL(budget) - rest;
1270}
1271
1272static void
1273jme_rx_empty_tasklet(unsigned long arg)
1274{
1275 struct jme_adapter *jme = (struct jme_adapter *)arg;
1276
1277 if (unlikely(atomic_read(&jme->link_changing) != 1))
1278 return;
1279
1280 if (unlikely(!netif_carrier_ok(jme->dev)))
1281 return;
1282
1283 msg_rx_status(jme, "RX Queue Full!\n");
1284
1285 jme_rx_clean_tasklet(arg);
1286
1287 while (atomic_read(&jme->rx_empty) > 0) {
1288 atomic_dec(&jme->rx_empty);
1289 ++(NET_STAT(jme).rx_dropped);
1290 jme_restart_rx_engine(jme);
1291 }
1292 atomic_inc(&jme->rx_empty);
1293}
1294
1295static void
1296jme_wake_queue_if_stopped(struct jme_adapter *jme)
1297{
1298 struct jme_ring *txring = jme->txring;
1299
1300 smp_wmb();
1301 if (unlikely(netif_queue_stopped(jme->dev) &&
1302 atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
1303 msg_tx_done(jme, "TX Queue Waked.\n");
1304 netif_wake_queue(jme->dev);
1305 }
1306
1307}
1308
1309static void
1310jme_tx_clean_tasklet(unsigned long arg)
1311{
1312 struct jme_adapter *jme = (struct jme_adapter *)arg;
1313 struct jme_ring *txring = &(jme->txring[0]);
1314 struct txdesc *txdesc = txring->desc;
1315 struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
1316 int i, j, cnt = 0, max, err, mask;
1317
1318 tx_dbg(jme, "Into txclean.\n");
1319
1320 if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
1321 goto out;
1322
1323 if (unlikely(atomic_read(&jme->link_changing) != 1))
1324 goto out;
1325
1326 if (unlikely(!netif_carrier_ok(jme->dev)))
1327 goto out;
1328
1329 max = jme->tx_ring_size - atomic_read(&txring->nr_free);
1330 mask = jme->tx_ring_mask;
1331
1332 for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
1333
1334 ctxbi = txbi + i;
1335
1336 if (likely(ctxbi->skb &&
1337 !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
1338
1339 tx_dbg(jme, "txclean: %d+%d@%lu\n",
1340 i, ctxbi->nr_desc, jiffies);
1341
1342 err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
1343
1344 for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
1345 ttxbi = txbi + ((i + j) & (mask));
1346 txdesc[(i + j) & (mask)].dw[0] = 0;
1347
1348 pci_unmap_page(jme->pdev,
1349 ttxbi->mapping,
1350 ttxbi->len,
1351 PCI_DMA_TODEVICE);
1352
1353 ttxbi->mapping = 0;
1354 ttxbi->len = 0;
1355 }
1356
1357 dev_kfree_skb(ctxbi->skb);
1358
1359 cnt += ctxbi->nr_desc;
1360
1361 if (unlikely(err)) {
1362 ++(NET_STAT(jme).tx_carrier_errors);
1363 } else {
1364 ++(NET_STAT(jme).tx_packets);
1365 NET_STAT(jme).tx_bytes += ctxbi->len;
1366 }
1367
1368 ctxbi->skb = NULL;
1369 ctxbi->len = 0;
1370 ctxbi->start_xmit = 0;
1371
1372 } else {
1373 break;
1374 }
1375
1376 i = (i + ctxbi->nr_desc) & mask;
1377
1378 ctxbi->nr_desc = 0;
1379 }
1380
1381 tx_dbg(jme, "txclean: done %d@%lu.\n", i, jiffies);
1382 atomic_set(&txring->next_to_clean, i);
1383 atomic_add(cnt, &txring->nr_free);
1384
1385 jme_wake_queue_if_stopped(jme);
1386
1387out:
1388 atomic_inc(&jme->tx_cleaning);
1389}
1390
1391static void
1392jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
1393{
1394 /*
1395 * Disable interrupt
1396 */
1397 jwrite32f(jme, JME_IENC, INTR_ENABLE);
1398
1399 if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
1400 /*
1401 * Link change event is critical
1402 * all other events are ignored
1403 */
1404 jwrite32(jme, JME_IEVE, intrstat);
1405 tasklet_schedule(&jme->linkch_task);
1406 goto out_reenable;
1407 }
1408
1409 if (intrstat & INTR_TMINTR) {
1410 jwrite32(jme, JME_IEVE, INTR_TMINTR);
1411 tasklet_schedule(&jme->pcc_task);
1412 }
1413
1414 if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
1415 jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
1416 tasklet_schedule(&jme->txclean_task);
1417 }
1418
1419 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1420 jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
1421 INTR_PCCRX0 |
1422 INTR_RX0EMP)) |
1423 INTR_RX0);
1424 }
1425
1426 if (test_bit(JME_FLAG_POLL, &jme->flags)) {
1427 if (intrstat & INTR_RX0EMP)
1428 atomic_inc(&jme->rx_empty);
1429
1430 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1431 if (likely(JME_RX_SCHEDULE_PREP(jme))) {
1432 jme_polling_mode(jme);
1433 JME_RX_SCHEDULE(jme);
1434 }
1435 }
1436 } else {
1437 if (intrstat & INTR_RX0EMP) {
1438 atomic_inc(&jme->rx_empty);
1439 tasklet_hi_schedule(&jme->rxempty_task);
1440 } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
1441 tasklet_hi_schedule(&jme->rxclean_task);
1442 }
1443 }
1444
1445out_reenable:
1446 /*
1447 * Re-enable interrupt
1448 */
1449 jwrite32f(jme, JME_IENS, INTR_ENABLE);
1450}
1451
1452static irqreturn_t
1453jme_intr(int irq, void *dev_id)
1454{
1455 struct net_device *netdev = dev_id;
1456 struct jme_adapter *jme = netdev_priv(netdev);
1457 u32 intrstat;
1458
1459 intrstat = jread32(jme, JME_IEVE);
1460
1461 /*
1462 * Check if it's really an interrupt for us
1463 */
1464 if (unlikely((intrstat & INTR_ENABLE) == 0))
1465 return IRQ_NONE;
1466
1467 /*
1468 * Check if the device still exist
1469 */
1470 if (unlikely(intrstat == ~((typeof(intrstat))0)))
1471 return IRQ_NONE;
1472
1473 jme_intr_msi(jme, intrstat);
1474
1475 return IRQ_HANDLED;
1476}
1477
1478static irqreturn_t
1479jme_msi(int irq, void *dev_id)
1480{
1481 struct net_device *netdev = dev_id;
1482 struct jme_adapter *jme = netdev_priv(netdev);
1483 u32 intrstat;
1484
1485 pci_dma_sync_single_for_cpu(jme->pdev,
1486 jme->shadow_dma,
1487 sizeof(u32) * SHADOW_REG_NR,
1488 PCI_DMA_FROMDEVICE);
1489 intrstat = jme->shadow_regs[SHADOW_IEVE];
1490 jme->shadow_regs[SHADOW_IEVE] = 0;
1491
1492 jme_intr_msi(jme, intrstat);
1493
1494 return IRQ_HANDLED;
1495}
1496
1497static void
1498jme_reset_link(struct jme_adapter *jme)
1499{
1500 jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
1501}
1502
1503static void
1504jme_restart_an(struct jme_adapter *jme)
1505{
1506 u32 bmcr;
1507
1508 spin_lock_bh(&jme->phy_lock);
1509 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1510 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1511 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1512 spin_unlock_bh(&jme->phy_lock);
1513}
1514
1515static int
1516jme_request_irq(struct jme_adapter *jme)
1517{
1518 int rc;
1519 struct net_device *netdev = jme->dev;
1520 irq_handler_t handler = jme_intr;
1521 int irq_flags = IRQF_SHARED;
1522
1523 if (!pci_enable_msi(jme->pdev)) {
1524 set_bit(JME_FLAG_MSI, &jme->flags);
1525 handler = jme_msi;
1526 irq_flags = 0;
1527 }
1528
1529 rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
1530 netdev);
1531 if (rc) {
1532 jeprintk(jme->pdev,
1533 "Unable to request %s interrupt (return: %d)\n",
1534 test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx",
1535 rc);
1536
1537 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1538 pci_disable_msi(jme->pdev);
1539 clear_bit(JME_FLAG_MSI, &jme->flags);
1540 }
1541 } else {
1542 netdev->irq = jme->pdev->irq;
1543 }
1544
1545 return rc;
1546}
1547
1548static void
1549jme_free_irq(struct jme_adapter *jme)
1550{
1551 free_irq(jme->pdev->irq, jme->dev);
1552 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1553 pci_disable_msi(jme->pdev);
1554 clear_bit(JME_FLAG_MSI, &jme->flags);
1555 jme->dev->irq = jme->pdev->irq;
1556 }
1557}
1558
1559static int
1560jme_open(struct net_device *netdev)
1561{
1562 struct jme_adapter *jme = netdev_priv(netdev);
1563 int rc;
1564
1565 jme_clear_pm(jme);
1566 JME_NAPI_ENABLE(jme);
1567
1568 tasklet_enable(&jme->txclean_task);
1569 tasklet_hi_enable(&jme->rxclean_task);
1570 tasklet_hi_enable(&jme->rxempty_task);
1571
1572 rc = jme_request_irq(jme);
1573 if (rc)
1574 goto err_out;
1575
1576 jme_enable_shadow(jme);
1577 jme_start_irq(jme);
1578
1579 if (test_bit(JME_FLAG_SSET, &jme->flags))
1580 jme_set_settings(netdev, &jme->old_ecmd);
1581 else
1582 jme_reset_phy_processor(jme);
1583
1584 jme_reset_link(jme);
1585
1586 return 0;
1587
1588err_out:
1589 netif_stop_queue(netdev);
1590 netif_carrier_off(netdev);
1591 return rc;
1592}
1593
1594#ifdef CONFIG_PM
1595static void
1596jme_set_100m_half(struct jme_adapter *jme)
1597{
1598 u32 bmcr, tmp;
1599
1600 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1601 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
1602 BMCR_SPEED1000 | BMCR_FULLDPLX);
1603 tmp |= BMCR_SPEED100;
1604
1605 if (bmcr != tmp)
1606 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
1607
1608 if (jme->fpgaver)
1609 jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL);
1610 else
1611 jwrite32(jme, JME_GHC, GHC_SPEED_100M);
1612}
1613
1614#define JME_WAIT_LINK_TIME 2000 /* 2000ms */
1615static void
1616jme_wait_link(struct jme_adapter *jme)
1617{
1618 u32 phylink, to = JME_WAIT_LINK_TIME;
1619
1620 mdelay(1000);
1621 phylink = jme_linkstat_from_phy(jme);
1622 while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
1623 mdelay(10);
1624 phylink = jme_linkstat_from_phy(jme);
1625 }
1626}
1627#endif
1628
1629static inline void
1630jme_phy_off(struct jme_adapter *jme)
1631{
1632 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, BMCR_PDOWN);
1633}
1634
1635static int
1636jme_close(struct net_device *netdev)
1637{
1638 struct jme_adapter *jme = netdev_priv(netdev);
1639
1640 netif_stop_queue(netdev);
1641 netif_carrier_off(netdev);
1642
1643 jme_stop_irq(jme);
1644 jme_disable_shadow(jme);
1645 jme_free_irq(jme);
1646
1647 JME_NAPI_DISABLE(jme);
1648
1649 tasklet_kill(&jme->linkch_task);
1650 tasklet_kill(&jme->txclean_task);
1651 tasklet_kill(&jme->rxclean_task);
1652 tasklet_kill(&jme->rxempty_task);
1653
1654 jme_reset_ghc_speed(jme);
1655 jme_disable_rx_engine(jme);
1656 jme_disable_tx_engine(jme);
1657 jme_reset_mac_processor(jme);
1658 jme_free_rx_resources(jme);
1659 jme_free_tx_resources(jme);
1660 jme->phylink = 0;
1661 jme_phy_off(jme);
1662
1663 return 0;
1664}
1665
1666static int
1667jme_alloc_txdesc(struct jme_adapter *jme,
1668 struct sk_buff *skb)
1669{
1670 struct jme_ring *txring = jme->txring;
1671 int idx, nr_alloc, mask = jme->tx_ring_mask;
1672
1673 idx = txring->next_to_use;
1674 nr_alloc = skb_shinfo(skb)->nr_frags + 2;
1675
1676 if (unlikely(atomic_read(&txring->nr_free) < nr_alloc))
1677 return -1;
1678
1679 atomic_sub(nr_alloc, &txring->nr_free);
1680
1681 txring->next_to_use = (txring->next_to_use + nr_alloc) & mask;
1682
1683 return idx;
1684}
1685
1686static void
1687jme_fill_tx_map(struct pci_dev *pdev,
1688 struct txdesc *txdesc,
1689 struct jme_buffer_info *txbi,
1690 struct page *page,
1691 u32 page_offset,
1692 u32 len,
1693 u8 hidma)
1694{
1695 dma_addr_t dmaaddr;
1696
1697 dmaaddr = pci_map_page(pdev,
1698 page,
1699 page_offset,
1700 len,
1701 PCI_DMA_TODEVICE);
1702
1703 pci_dma_sync_single_for_device(pdev,
1704 dmaaddr,
1705 len,
1706 PCI_DMA_TODEVICE);
1707
1708 txdesc->dw[0] = 0;
1709 txdesc->dw[1] = 0;
1710 txdesc->desc2.flags = TXFLAG_OWN;
1711 txdesc->desc2.flags |= (hidma) ? TXFLAG_64BIT : 0;
1712 txdesc->desc2.datalen = cpu_to_le16(len);
1713 txdesc->desc2.bufaddrh = cpu_to_le32((__u64)dmaaddr >> 32);
1714 txdesc->desc2.bufaddrl = cpu_to_le32(
1715 (__u64)dmaaddr & 0xFFFFFFFFUL);
1716
1717 txbi->mapping = dmaaddr;
1718 txbi->len = len;
1719}
1720
1721static void
1722jme_map_tx_skb(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1723{
1724 struct jme_ring *txring = jme->txring;
1725 struct txdesc *txdesc = txring->desc, *ctxdesc;
1726 struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
1727 u8 hidma = jme->dev->features & NETIF_F_HIGHDMA;
1728 int i, nr_frags = skb_shinfo(skb)->nr_frags;
1729 int mask = jme->tx_ring_mask;
1730 struct skb_frag_struct *frag;
1731 u32 len;
1732
1733 for (i = 0 ; i < nr_frags ; ++i) {
1734 frag = &skb_shinfo(skb)->frags[i];
1735 ctxdesc = txdesc + ((idx + i + 2) & (mask));
1736 ctxbi = txbi + ((idx + i + 2) & (mask));
1737
1738 jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, frag->page,
1739 frag->page_offset, frag->size, hidma);
1740 }
1741
1742 len = skb_is_nonlinear(skb) ? skb_headlen(skb) : skb->len;
1743 ctxdesc = txdesc + ((idx + 1) & (mask));
1744 ctxbi = txbi + ((idx + 1) & (mask));
1745 jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, virt_to_page(skb->data),
1746 offset_in_page(skb->data), len, hidma);
1747
1748}
1749
1750static int
1751jme_expand_header(struct jme_adapter *jme, struct sk_buff *skb)
1752{
1753 if (unlikely(skb_shinfo(skb)->gso_size &&
1754 skb_header_cloned(skb) &&
1755 pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
1756 dev_kfree_skb(skb);
1757 return -1;
1758 }
1759
1760 return 0;
1761}
1762
1763static int
1764jme_tx_tso(struct sk_buff *skb, __le16 *mss, u8 *flags)
1765{
1766 *mss = cpu_to_le16(skb_shinfo(skb)->gso_size << TXDESC_MSS_SHIFT);
1767 if (*mss) {
1768 *flags |= TXFLAG_LSEN;
1769
1770 if (skb->protocol == htons(ETH_P_IP)) {
1771 struct iphdr *iph = ip_hdr(skb);
1772
1773 iph->check = 0;
1774 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1775 iph->daddr, 0,
1776 IPPROTO_TCP,
1777 0);
1778 } else {
1779 struct ipv6hdr *ip6h = ipv6_hdr(skb);
1780
1781 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ip6h->saddr,
1782 &ip6h->daddr, 0,
1783 IPPROTO_TCP,
1784 0);
1785 }
1786
1787 return 0;
1788 }
1789
1790 return 1;
1791}
1792
1793static void
1794jme_tx_csum(struct jme_adapter *jme, struct sk_buff *skb, u8 *flags)
1795{
1796 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1797 u8 ip_proto;
1798
1799 switch (skb->protocol) {
1800 case htons(ETH_P_IP):
1801 ip_proto = ip_hdr(skb)->protocol;
1802 break;
1803 case htons(ETH_P_IPV6):
1804 ip_proto = ipv6_hdr(skb)->nexthdr;
1805 break;
1806 default:
1807 ip_proto = 0;
1808 break;
1809 }
1810
1811 switch (ip_proto) {
1812 case IPPROTO_TCP:
1813 *flags |= TXFLAG_TCPCS;
1814 break;
1815 case IPPROTO_UDP:
1816 *flags |= TXFLAG_UDPCS;
1817 break;
1818 default:
1819 msg_tx_err(jme, "Error upper layer protocol.\n");
1820 break;
1821 }
1822 }
1823}
1824
1825static inline void
1826jme_tx_vlan(struct sk_buff *skb, __le16 *vlan, u8 *flags)
1827{
1828 if (vlan_tx_tag_present(skb)) {
1829 *flags |= TXFLAG_TAGON;
1830 *vlan = cpu_to_le16(vlan_tx_tag_get(skb));
1831 }
1832}
1833
1834static int
1835jme_fill_tx_desc(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1836{
1837 struct jme_ring *txring = jme->txring;
1838 struct txdesc *txdesc;
1839 struct jme_buffer_info *txbi;
1840 u8 flags;
1841
1842 txdesc = (struct txdesc *)txring->desc + idx;
1843 txbi = txring->bufinf + idx;
1844
1845 txdesc->dw[0] = 0;
1846 txdesc->dw[1] = 0;
1847 txdesc->dw[2] = 0;
1848 txdesc->dw[3] = 0;
1849 txdesc->desc1.pktsize = cpu_to_le16(skb->len);
1850 /*
1851 * Set OWN bit at final.
1852 * When kernel transmit faster than NIC.
1853 * And NIC trying to send this descriptor before we tell
1854 * it to start sending this TX queue.
1855 * Other fields are already filled correctly.
1856 */
1857 wmb();
1858 flags = TXFLAG_OWN | TXFLAG_INT;
1859 /*
1860 * Set checksum flags while not tso
1861 */
1862 if (jme_tx_tso(skb, &txdesc->desc1.mss, &flags))
1863 jme_tx_csum(jme, skb, &flags);
1864 jme_tx_vlan(skb, &txdesc->desc1.vlan, &flags);
1865 jme_map_tx_skb(jme, skb, idx);
1866 txdesc->desc1.flags = flags;
1867 /*
1868 * Set tx buffer info after telling NIC to send
1869 * For better tx_clean timing
1870 */
1871 wmb();
1872 txbi->nr_desc = skb_shinfo(skb)->nr_frags + 2;
1873 txbi->skb = skb;
1874 txbi->len = skb->len;
1875 txbi->start_xmit = jiffies;
1876 if (!txbi->start_xmit)
1877 txbi->start_xmit = (0UL-1);
1878
1879 return 0;
1880}
1881
1882static void
1883jme_stop_queue_if_full(struct jme_adapter *jme)
1884{
1885 struct jme_ring *txring = jme->txring;
1886 struct jme_buffer_info *txbi = txring->bufinf;
1887 int idx = atomic_read(&txring->next_to_clean);
1888
1889 txbi += idx;
1890
1891 smp_wmb();
1892 if (unlikely(atomic_read(&txring->nr_free) < (MAX_SKB_FRAGS+2))) {
1893 netif_stop_queue(jme->dev);
1894 msg_tx_queued(jme, "TX Queue Paused.\n");
1895 smp_wmb();
1896 if (atomic_read(&txring->nr_free)
1897 >= (jme->tx_wake_threshold)) {
1898 netif_wake_queue(jme->dev);
1899 msg_tx_queued(jme, "TX Queue Fast Waked.\n");
1900 }
1901 }
1902
1903 if (unlikely(txbi->start_xmit &&
1904 (jiffies - txbi->start_xmit) >= TX_TIMEOUT &&
1905 txbi->skb)) {
1906 netif_stop_queue(jme->dev);
1907 msg_tx_queued(jme, "TX Queue Stopped %d@%lu.\n", idx, jiffies);
1908 }
1909}
1910
1911/*
1912 * This function is already protected by netif_tx_lock()
1913 */
1914
1915static int
1916jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
1917{
1918 struct jme_adapter *jme = netdev_priv(netdev);
1919 int idx;
1920
1921 if (unlikely(jme_expand_header(jme, skb))) {
1922 ++(NET_STAT(jme).tx_dropped);
1923 return NETDEV_TX_OK;
1924 }
1925
1926 idx = jme_alloc_txdesc(jme, skb);
1927
1928 if (unlikely(idx < 0)) {
1929 netif_stop_queue(netdev);
1930 msg_tx_err(jme, "BUG! Tx ring full when queue awake!\n");
1931
1932 return NETDEV_TX_BUSY;
1933 }
1934
1935 jme_fill_tx_desc(jme, skb, idx);
1936
1937 jwrite32(jme, JME_TXCS, jme->reg_txcs |
1938 TXCS_SELECT_QUEUE0 |
1939 TXCS_QUEUE0S |
1940 TXCS_ENABLE);
1941 netdev->trans_start = jiffies;
1942
1943 tx_dbg(jme, "xmit: %d+%d@%lu\n", idx,
1944 skb_shinfo(skb)->nr_frags + 2,
1945 jiffies);
1946 jme_stop_queue_if_full(jme);
1947
1948 return NETDEV_TX_OK;
1949}
1950
1951static int
1952jme_set_macaddr(struct net_device *netdev, void *p)
1953{
1954 struct jme_adapter *jme = netdev_priv(netdev);
1955 struct sockaddr *addr = p;
1956 u32 val;
1957
1958 if (netif_running(netdev))
1959 return -EBUSY;
1960
1961 spin_lock_bh(&jme->macaddr_lock);
1962 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1963
1964 val = (addr->sa_data[3] & 0xff) << 24 |
1965 (addr->sa_data[2] & 0xff) << 16 |
1966 (addr->sa_data[1] & 0xff) << 8 |
1967 (addr->sa_data[0] & 0xff);
1968 jwrite32(jme, JME_RXUMA_LO, val);
1969 val = (addr->sa_data[5] & 0xff) << 8 |
1970 (addr->sa_data[4] & 0xff);
1971 jwrite32(jme, JME_RXUMA_HI, val);
1972 spin_unlock_bh(&jme->macaddr_lock);
1973
1974 return 0;
1975}
1976
1977static void
1978jme_set_multi(struct net_device *netdev)
1979{
1980 struct jme_adapter *jme = netdev_priv(netdev);
1981 u32 mc_hash[2] = {};
1982 int i;
1983
1984 spin_lock_bh(&jme->rxmcs_lock);
1985
1986 jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME;
1987
1988 if (netdev->flags & IFF_PROMISC) {
1989 jme->reg_rxmcs |= RXMCS_ALLFRAME;
1990 } else if (netdev->flags & IFF_ALLMULTI) {
1991 jme->reg_rxmcs |= RXMCS_ALLMULFRAME;
1992 } else if (netdev->flags & IFF_MULTICAST) {
1993 struct dev_mc_list *mclist;
1994 int bit_nr;
1995
1996 jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
1997 for (i = 0, mclist = netdev->mc_list;
1998 mclist && i < netdev->mc_count;
1999 ++i, mclist = mclist->next) {
2000
2001 bit_nr = ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x3F;
2002 mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
2003 }
2004
2005 jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
2006 jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]);
2007 }
2008
2009 wmb();
2010 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2011
2012 spin_unlock_bh(&jme->rxmcs_lock);
2013}
2014
2015static int
2016jme_change_mtu(struct net_device *netdev, int new_mtu)
2017{
2018 struct jme_adapter *jme = netdev_priv(netdev);
2019
2020 if (new_mtu == jme->old_mtu)
2021 return 0;
2022
2023 if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) ||
2024 ((new_mtu) < IPV6_MIN_MTU))
2025 return -EINVAL;
2026
2027 if (new_mtu > 4000) {
2028 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2029 jme->reg_rxcs |= RXCS_FIFOTHNP_64QW;
2030 jme_restart_rx_engine(jme);
2031 } else {
2032 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2033 jme->reg_rxcs |= RXCS_FIFOTHNP_128QW;
2034 jme_restart_rx_engine(jme);
2035 }
2036
2037 if (new_mtu > 1900) {
2038 netdev->features &= ~(NETIF_F_HW_CSUM |
2039 NETIF_F_TSO |
2040 NETIF_F_TSO6);
2041 } else {
2042 if (test_bit(JME_FLAG_TXCSUM, &jme->flags))
2043 netdev->features |= NETIF_F_HW_CSUM;
2044 if (test_bit(JME_FLAG_TSO, &jme->flags))
2045 netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2046 }
2047
2048 netdev->mtu = new_mtu;
2049 jme_reset_link(jme);
2050
2051 return 0;
2052}
2053
2054static void
2055jme_tx_timeout(struct net_device *netdev)
2056{
2057 struct jme_adapter *jme = netdev_priv(netdev);
2058
2059 jme->phylink = 0;
2060 jme_reset_phy_processor(jme);
2061 if (test_bit(JME_FLAG_SSET, &jme->flags))
2062 jme_set_settings(netdev, &jme->old_ecmd);
2063
2064 /*
2065 * Force to Reset the link again
2066 */
2067 jme_reset_link(jme);
2068}
2069
2070static void
2071jme_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2072{
2073 struct jme_adapter *jme = netdev_priv(netdev);
2074
2075 jme->vlgrp = grp;
2076}
2077
2078static void
2079jme_get_drvinfo(struct net_device *netdev,
2080 struct ethtool_drvinfo *info)
2081{
2082 struct jme_adapter *jme = netdev_priv(netdev);
2083
2084 strcpy(info->driver, DRV_NAME);
2085 strcpy(info->version, DRV_VERSION);
2086 strcpy(info->bus_info, pci_name(jme->pdev));
2087}
2088
2089static int
2090jme_get_regs_len(struct net_device *netdev)
2091{
2092 return JME_REG_LEN;
2093}
2094
2095static void
2096mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len)
2097{
2098 int i;
2099
2100 for (i = 0 ; i < len ; i += 4)
2101 p[i >> 2] = jread32(jme, reg + i);
2102}
2103
2104static void
2105mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr)
2106{
2107 int i;
2108 u16 *p16 = (u16 *)p;
2109
2110 for (i = 0 ; i < reg_nr ; ++i)
2111 p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i);
2112}
2113
2114static void
2115jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
2116{
2117 struct jme_adapter *jme = netdev_priv(netdev);
2118 u32 *p32 = (u32 *)p;
2119
2120 memset(p, 0xFF, JME_REG_LEN);
2121
2122 regs->version = 1;
2123 mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
2124
2125 p32 += 0x100 >> 2;
2126 mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
2127
2128 p32 += 0x100 >> 2;
2129 mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
2130
2131 p32 += 0x100 >> 2;
2132 mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
2133
2134 p32 += 0x100 >> 2;
2135 mdio_memcpy(jme, p32, JME_PHY_REG_NR);
2136}
2137
2138static int
2139jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2140{
2141 struct jme_adapter *jme = netdev_priv(netdev);
2142
2143 ecmd->tx_coalesce_usecs = PCC_TX_TO;
2144 ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
2145
2146 if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2147 ecmd->use_adaptive_rx_coalesce = false;
2148 ecmd->rx_coalesce_usecs = 0;
2149 ecmd->rx_max_coalesced_frames = 0;
2150 return 0;
2151 }
2152
2153 ecmd->use_adaptive_rx_coalesce = true;
2154
2155 switch (jme->dpi.cur) {
2156 case PCC_P1:
2157 ecmd->rx_coalesce_usecs = PCC_P1_TO;
2158 ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
2159 break;
2160 case PCC_P2:
2161 ecmd->rx_coalesce_usecs = PCC_P2_TO;
2162 ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
2163 break;
2164 case PCC_P3:
2165 ecmd->rx_coalesce_usecs = PCC_P3_TO;
2166 ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
2167 break;
2168 default:
2169 break;
2170 }
2171
2172 return 0;
2173}
2174
2175static int
2176jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2177{
2178 struct jme_adapter *jme = netdev_priv(netdev);
2179 struct dynpcc_info *dpi = &(jme->dpi);
2180
2181 if (netif_running(netdev))
2182 return -EBUSY;
2183
2184 if (ecmd->use_adaptive_rx_coalesce
2185 && test_bit(JME_FLAG_POLL, &jme->flags)) {
2186 clear_bit(JME_FLAG_POLL, &jme->flags);
2187 jme->jme_rx = netif_rx;
2188 jme->jme_vlan_rx = vlan_hwaccel_rx;
2189 dpi->cur = PCC_P1;
2190 dpi->attempt = PCC_P1;
2191 dpi->cnt = 0;
2192 jme_set_rx_pcc(jme, PCC_P1);
2193 jme_interrupt_mode(jme);
2194 } else if (!(ecmd->use_adaptive_rx_coalesce)
2195 && !(test_bit(JME_FLAG_POLL, &jme->flags))) {
2196 set_bit(JME_FLAG_POLL, &jme->flags);
2197 jme->jme_rx = netif_receive_skb;
2198 jme->jme_vlan_rx = vlan_hwaccel_receive_skb;
2199 jme_interrupt_mode(jme);
2200 }
2201
2202 return 0;
2203}
2204
2205static void
2206jme_get_pauseparam(struct net_device *netdev,
2207 struct ethtool_pauseparam *ecmd)
2208{
2209 struct jme_adapter *jme = netdev_priv(netdev);
2210 u32 val;
2211
2212 ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
2213 ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
2214
2215 spin_lock_bh(&jme->phy_lock);
2216 val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2217 spin_unlock_bh(&jme->phy_lock);
2218
2219 ecmd->autoneg =
2220 (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
2221}
2222
2223static int
2224jme_set_pauseparam(struct net_device *netdev,
2225 struct ethtool_pauseparam *ecmd)
2226{
2227 struct jme_adapter *jme = netdev_priv(netdev);
2228 u32 val;
2229
2230 if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
2231 (ecmd->tx_pause != 0)) {
2232
2233 if (ecmd->tx_pause)
2234 jme->reg_txpfc |= TXPFC_PF_EN;
2235 else
2236 jme->reg_txpfc &= ~TXPFC_PF_EN;
2237
2238 jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
2239 }
2240
2241 spin_lock_bh(&jme->rxmcs_lock);
2242 if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^
2243 (ecmd->rx_pause != 0)) {
2244
2245 if (ecmd->rx_pause)
2246 jme->reg_rxmcs |= RXMCS_FLOWCTRL;
2247 else
2248 jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
2249
2250 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2251 }
2252 spin_unlock_bh(&jme->rxmcs_lock);
2253
2254 spin_lock_bh(&jme->phy_lock);
2255 val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2256 if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^
2257 (ecmd->autoneg != 0)) {
2258
2259 if (ecmd->autoneg)
2260 val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2261 else
2262 val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2263
2264 jme_mdio_write(jme->dev, jme->mii_if.phy_id,
2265 MII_ADVERTISE, val);
2266 }
2267 spin_unlock_bh(&jme->phy_lock);
2268
2269 return 0;
2270}
2271
2272static void
2273jme_get_wol(struct net_device *netdev,
2274 struct ethtool_wolinfo *wol)
2275{
2276 struct jme_adapter *jme = netdev_priv(netdev);
2277
2278 wol->supported = WAKE_MAGIC | WAKE_PHY;
2279
2280 wol->wolopts = 0;
2281
2282 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2283 wol->wolopts |= WAKE_PHY;
2284
2285 if (jme->reg_pmcs & PMCS_MFEN)
2286 wol->wolopts |= WAKE_MAGIC;
2287
2288}
2289
2290static int
2291jme_set_wol(struct net_device *netdev,
2292 struct ethtool_wolinfo *wol)
2293{
2294 struct jme_adapter *jme = netdev_priv(netdev);
2295
2296 if (wol->wolopts & (WAKE_MAGICSECURE |
2297 WAKE_UCAST |
2298 WAKE_MCAST |
2299 WAKE_BCAST |
2300 WAKE_ARP))
2301 return -EOPNOTSUPP;
2302
2303 jme->reg_pmcs = 0;
2304
2305 if (wol->wolopts & WAKE_PHY)
2306 jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
2307
2308 if (wol->wolopts & WAKE_MAGIC)
2309 jme->reg_pmcs |= PMCS_MFEN;
2310
2311 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2312
2313 return 0;
2314}
2315
2316static int
2317jme_get_settings(struct net_device *netdev,
2318 struct ethtool_cmd *ecmd)
2319{
2320 struct jme_adapter *jme = netdev_priv(netdev);
2321 int rc;
2322
2323 spin_lock_bh(&jme->phy_lock);
2324 rc = mii_ethtool_gset(&(jme->mii_if), ecmd);
2325 spin_unlock_bh(&jme->phy_lock);
2326 return rc;
2327}
2328
2329static int
2330jme_set_settings(struct net_device *netdev,
2331 struct ethtool_cmd *ecmd)
2332{
2333 struct jme_adapter *jme = netdev_priv(netdev);
2334 int rc, fdc = 0;
2335
2336 if (ecmd->speed == SPEED_1000 && ecmd->autoneg != AUTONEG_ENABLE)
2337 return -EINVAL;
2338
2339 if (jme->mii_if.force_media &&
2340 ecmd->autoneg != AUTONEG_ENABLE &&
2341 (jme->mii_if.full_duplex != ecmd->duplex))
2342 fdc = 1;
2343
2344 spin_lock_bh(&jme->phy_lock);
2345 rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
2346 spin_unlock_bh(&jme->phy_lock);
2347
2348 if (!rc && fdc)
2349 jme_reset_link(jme);
2350
2351 if (!rc) {
2352 set_bit(JME_FLAG_SSET, &jme->flags);
2353 jme->old_ecmd = *ecmd;
2354 }
2355
2356 return rc;
2357}
2358
2359static u32
2360jme_get_link(struct net_device *netdev)
2361{
2362 struct jme_adapter *jme = netdev_priv(netdev);
2363 return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
2364}
2365
2366static u32
2367jme_get_msglevel(struct net_device *netdev)
2368{
2369 struct jme_adapter *jme = netdev_priv(netdev);
2370 return jme->msg_enable;
2371}
2372
2373static void
2374jme_set_msglevel(struct net_device *netdev, u32 value)
2375{
2376 struct jme_adapter *jme = netdev_priv(netdev);
2377 jme->msg_enable = value;
2378}
2379
2380static u32
2381jme_get_rx_csum(struct net_device *netdev)
2382{
2383 struct jme_adapter *jme = netdev_priv(netdev);
2384 return jme->reg_rxmcs & RXMCS_CHECKSUM;
2385}
2386
2387static int
2388jme_set_rx_csum(struct net_device *netdev, u32 on)
2389{
2390 struct jme_adapter *jme = netdev_priv(netdev);
2391
2392 spin_lock_bh(&jme->rxmcs_lock);
2393 if (on)
2394 jme->reg_rxmcs |= RXMCS_CHECKSUM;
2395 else
2396 jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
2397 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2398 spin_unlock_bh(&jme->rxmcs_lock);
2399
2400 return 0;
2401}
2402
2403static int
2404jme_set_tx_csum(struct net_device *netdev, u32 on)
2405{
2406 struct jme_adapter *jme = netdev_priv(netdev);
2407
2408 if (on) {
2409 set_bit(JME_FLAG_TXCSUM, &jme->flags);
2410 if (netdev->mtu <= 1900)
2411 netdev->features |= NETIF_F_HW_CSUM;
2412 } else {
2413 clear_bit(JME_FLAG_TXCSUM, &jme->flags);
2414 netdev->features &= ~NETIF_F_HW_CSUM;
2415 }
2416
2417 return 0;
2418}
2419
2420static int
2421jme_set_tso(struct net_device *netdev, u32 on)
2422{
2423 struct jme_adapter *jme = netdev_priv(netdev);
2424
2425 if (on) {
2426 set_bit(JME_FLAG_TSO, &jme->flags);
2427 if (netdev->mtu <= 1900)
2428 netdev->features |= NETIF_F_TSO | NETIF_F_TSO6;
2429 } else {
2430 clear_bit(JME_FLAG_TSO, &jme->flags);
2431 netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
2432 }
2433
2434 return 0;
2435}
2436
2437static int
2438jme_nway_reset(struct net_device *netdev)
2439{
2440 struct jme_adapter *jme = netdev_priv(netdev);
2441 jme_restart_an(jme);
2442 return 0;
2443}
2444
2445static u8
2446jme_smb_read(struct jme_adapter *jme, unsigned int addr)
2447{
2448 u32 val;
2449 int to;
2450
2451 val = jread32(jme, JME_SMBCSR);
2452 to = JME_SMB_BUSY_TIMEOUT;
2453 while ((val & SMBCSR_BUSY) && --to) {
2454 msleep(1);
2455 val = jread32(jme, JME_SMBCSR);
2456 }
2457 if (!to) {
2458 msg_hw(jme, "SMB Bus Busy.\n");
2459 return 0xFF;
2460 }
2461
2462 jwrite32(jme, JME_SMBINTF,
2463 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2464 SMBINTF_HWRWN_READ |
2465 SMBINTF_HWCMD);
2466
2467 val = jread32(jme, JME_SMBINTF);
2468 to = JME_SMB_BUSY_TIMEOUT;
2469 while ((val & SMBINTF_HWCMD) && --to) {
2470 msleep(1);
2471 val = jread32(jme, JME_SMBINTF);
2472 }
2473 if (!to) {
2474 msg_hw(jme, "SMB Bus Busy.\n");
2475 return 0xFF;
2476 }
2477
2478 return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT;
2479}
2480
2481static void
2482jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data)
2483{
2484 u32 val;
2485 int to;
2486
2487 val = jread32(jme, JME_SMBCSR);
2488 to = JME_SMB_BUSY_TIMEOUT;
2489 while ((val & SMBCSR_BUSY) && --to) {
2490 msleep(1);
2491 val = jread32(jme, JME_SMBCSR);
2492 }
2493 if (!to) {
2494 msg_hw(jme, "SMB Bus Busy.\n");
2495 return;
2496 }
2497
2498 jwrite32(jme, JME_SMBINTF,
2499 ((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) |
2500 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2501 SMBINTF_HWRWN_WRITE |
2502 SMBINTF_HWCMD);
2503
2504 val = jread32(jme, JME_SMBINTF);
2505 to = JME_SMB_BUSY_TIMEOUT;
2506 while ((val & SMBINTF_HWCMD) && --to) {
2507 msleep(1);
2508 val = jread32(jme, JME_SMBINTF);
2509 }
2510 if (!to) {
2511 msg_hw(jme, "SMB Bus Busy.\n");
2512 return;
2513 }
2514
2515 mdelay(2);
2516}
2517
2518static int
2519jme_get_eeprom_len(struct net_device *netdev)
2520{
2521 struct jme_adapter *jme = netdev_priv(netdev);
2522 u32 val;
2523 val = jread32(jme, JME_SMBCSR);
2524 return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0;
2525}
2526
2527static int
2528jme_get_eeprom(struct net_device *netdev,
2529 struct ethtool_eeprom *eeprom, u8 *data)
2530{
2531 struct jme_adapter *jme = netdev_priv(netdev);
2532 int i, offset = eeprom->offset, len = eeprom->len;
2533
2534 /*
2535 * ethtool will check the boundary for us
2536 */
2537 eeprom->magic = JME_EEPROM_MAGIC;
2538 for (i = 0 ; i < len ; ++i)
2539 data[i] = jme_smb_read(jme, i + offset);
2540
2541 return 0;
2542}
2543
2544static int
2545jme_set_eeprom(struct net_device *netdev,
2546 struct ethtool_eeprom *eeprom, u8 *data)
2547{
2548 struct jme_adapter *jme = netdev_priv(netdev);
2549 int i, offset = eeprom->offset, len = eeprom->len;
2550
2551 if (eeprom->magic != JME_EEPROM_MAGIC)
2552 return -EINVAL;
2553
2554 /*
2555 * ethtool will check the boundary for us
2556 */
2557 for (i = 0 ; i < len ; ++i)
2558 jme_smb_write(jme, i + offset, data[i]);
2559
2560 return 0;
2561}
2562
2563static const struct ethtool_ops jme_ethtool_ops = {
2564 .get_drvinfo = jme_get_drvinfo,
2565 .get_regs_len = jme_get_regs_len,
2566 .get_regs = jme_get_regs,
2567 .get_coalesce = jme_get_coalesce,
2568 .set_coalesce = jme_set_coalesce,
2569 .get_pauseparam = jme_get_pauseparam,
2570 .set_pauseparam = jme_set_pauseparam,
2571 .get_wol = jme_get_wol,
2572 .set_wol = jme_set_wol,
2573 .get_settings = jme_get_settings,
2574 .set_settings = jme_set_settings,
2575 .get_link = jme_get_link,
2576 .get_msglevel = jme_get_msglevel,
2577 .set_msglevel = jme_set_msglevel,
2578 .get_rx_csum = jme_get_rx_csum,
2579 .set_rx_csum = jme_set_rx_csum,
2580 .set_tx_csum = jme_set_tx_csum,
2581 .set_tso = jme_set_tso,
2582 .set_sg = ethtool_op_set_sg,
2583 .nway_reset = jme_nway_reset,
2584 .get_eeprom_len = jme_get_eeprom_len,
2585 .get_eeprom = jme_get_eeprom,
2586 .set_eeprom = jme_set_eeprom,
2587};
2588
2589static int
2590jme_pci_dma64(struct pci_dev *pdev)
2591{
2592 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2593 !pci_set_dma_mask(pdev, DMA_64BIT_MASK))
2594 if (!pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))
2595 return 1;
2596
2597 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2598 !pci_set_dma_mask(pdev, DMA_40BIT_MASK))
2599 if (!pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK))
2600 return 1;
2601
2602 if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK))
2603 if (!pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK))
2604 return 0;
2605
2606 return -1;
2607}
2608
2609static inline void
2610jme_phy_init(struct jme_adapter *jme)
2611{
2612 u16 reg26;
2613
2614 reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26);
2615 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000);
2616}
2617
2618static inline void
2619jme_check_hw_ver(struct jme_adapter *jme)
2620{
2621 u32 chipmode;
2622
2623 chipmode = jread32(jme, JME_CHIPMODE);
2624
2625 jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT;
2626 jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT;
2627}
2628
2629static const struct net_device_ops jme_netdev_ops = {
2630 .ndo_open = jme_open,
2631 .ndo_stop = jme_close,
2632 .ndo_validate_addr = eth_validate_addr,
2633 .ndo_start_xmit = jme_start_xmit,
2634 .ndo_set_mac_address = jme_set_macaddr,
2635 .ndo_set_multicast_list = jme_set_multi,
2636 .ndo_change_mtu = jme_change_mtu,
2637 .ndo_tx_timeout = jme_tx_timeout,
2638 .ndo_vlan_rx_register = jme_vlan_rx_register,
2639};
2640
2641static int __devinit
2642jme_init_one(struct pci_dev *pdev,
2643 const struct pci_device_id *ent)
2644{
2645 int rc = 0, using_dac, i;
2646 struct net_device *netdev;
2647 struct jme_adapter *jme;
2648 u16 bmcr, bmsr;
2649 u32 apmc;
2650
2651 /*
2652 * set up PCI device basics
2653 */
2654 rc = pci_enable_device(pdev);
2655 if (rc) {
2656 jeprintk(pdev, "Cannot enable PCI device.\n");
2657 goto err_out;
2658 }
2659
2660 using_dac = jme_pci_dma64(pdev);
2661 if (using_dac < 0) {
2662 jeprintk(pdev, "Cannot set PCI DMA Mask.\n");
2663 rc = -EIO;
2664 goto err_out_disable_pdev;
2665 }
2666
2667 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2668 jeprintk(pdev, "No PCI resource region found.\n");
2669 rc = -ENOMEM;
2670 goto err_out_disable_pdev;
2671 }
2672
2673 rc = pci_request_regions(pdev, DRV_NAME);
2674 if (rc) {
2675 jeprintk(pdev, "Cannot obtain PCI resource region.\n");
2676 goto err_out_disable_pdev;
2677 }
2678
2679 pci_set_master(pdev);
2680
2681 /*
2682 * alloc and init net device
2683 */
2684 netdev = alloc_etherdev(sizeof(*jme));
2685 if (!netdev) {
2686 jeprintk(pdev, "Cannot allocate netdev structure.\n");
2687 rc = -ENOMEM;
2688 goto err_out_release_regions;
2689 }
2690 netdev->netdev_ops = &jme_netdev_ops;
2691 netdev->ethtool_ops = &jme_ethtool_ops;
2692 netdev->watchdog_timeo = TX_TIMEOUT;
2693 netdev->features = NETIF_F_HW_CSUM |
2694 NETIF_F_SG |
2695 NETIF_F_TSO |
2696 NETIF_F_TSO6 |
2697 NETIF_F_HW_VLAN_TX |
2698 NETIF_F_HW_VLAN_RX;
2699 if (using_dac)
2700 netdev->features |= NETIF_F_HIGHDMA;
2701
2702 SET_NETDEV_DEV(netdev, &pdev->dev);
2703 pci_set_drvdata(pdev, netdev);
2704
2705 /*
2706 * init adapter info
2707 */
2708 jme = netdev_priv(netdev);
2709 jme->pdev = pdev;
2710 jme->dev = netdev;
2711 jme->jme_rx = netif_rx;
2712 jme->jme_vlan_rx = vlan_hwaccel_rx;
2713 jme->old_mtu = netdev->mtu = 1500;
2714 jme->phylink = 0;
2715 jme->tx_ring_size = 1 << 10;
2716 jme->tx_ring_mask = jme->tx_ring_size - 1;
2717 jme->tx_wake_threshold = 1 << 9;
2718 jme->rx_ring_size = 1 << 9;
2719 jme->rx_ring_mask = jme->rx_ring_size - 1;
2720 jme->msg_enable = JME_DEF_MSG_ENABLE;
2721 jme->regs = ioremap(pci_resource_start(pdev, 0),
2722 pci_resource_len(pdev, 0));
2723 if (!(jme->regs)) {
2724 jeprintk(pdev, "Mapping PCI resource region error.\n");
2725 rc = -ENOMEM;
2726 goto err_out_free_netdev;
2727 }
2728 jme->shadow_regs = pci_alloc_consistent(pdev,
2729 sizeof(u32) * SHADOW_REG_NR,
2730 &(jme->shadow_dma));
2731 if (!(jme->shadow_regs)) {
2732 jeprintk(pdev, "Allocating shadow register mapping error.\n");
2733 rc = -ENOMEM;
2734 goto err_out_unmap;
2735 }
2736
2737 if (no_pseudohp) {
2738 apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN;
2739 jwrite32(jme, JME_APMC, apmc);
2740 } else if (force_pseudohp) {
2741 apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN;
2742 jwrite32(jme, JME_APMC, apmc);
2743 }
2744
2745 NETIF_NAPI_SET(netdev, &jme->napi, jme_poll, jme->rx_ring_size >> 2)
2746
2747 spin_lock_init(&jme->phy_lock);
2748 spin_lock_init(&jme->macaddr_lock);
2749 spin_lock_init(&jme->rxmcs_lock);
2750
2751 atomic_set(&jme->link_changing, 1);
2752 atomic_set(&jme->rx_cleaning, 1);
2753 atomic_set(&jme->tx_cleaning, 1);
2754 atomic_set(&jme->rx_empty, 1);
2755
2756 tasklet_init(&jme->pcc_task,
2757 &jme_pcc_tasklet,
2758 (unsigned long) jme);
2759 tasklet_init(&jme->linkch_task,
2760 &jme_link_change_tasklet,
2761 (unsigned long) jme);
2762 tasklet_init(&jme->txclean_task,
2763 &jme_tx_clean_tasklet,
2764 (unsigned long) jme);
2765 tasklet_init(&jme->rxclean_task,
2766 &jme_rx_clean_tasklet,
2767 (unsigned long) jme);
2768 tasklet_init(&jme->rxempty_task,
2769 &jme_rx_empty_tasklet,
2770 (unsigned long) jme);
2771 tasklet_disable_nosync(&jme->txclean_task);
2772 tasklet_disable_nosync(&jme->rxclean_task);
2773 tasklet_disable_nosync(&jme->rxempty_task);
2774 jme->dpi.cur = PCC_P1;
2775
2776 jme->reg_ghc = 0;
2777 jme->reg_rxcs = RXCS_DEFAULT;
2778 jme->reg_rxmcs = RXMCS_DEFAULT;
2779 jme->reg_txpfc = 0;
2780 jme->reg_pmcs = PMCS_MFEN;
2781 set_bit(JME_FLAG_TXCSUM, &jme->flags);
2782 set_bit(JME_FLAG_TSO, &jme->flags);
2783
2784 /*
2785 * Get Max Read Req Size from PCI Config Space
2786 */
2787 pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs);
2788 jme->mrrs &= PCI_DCSR_MRRS_MASK;
2789 switch (jme->mrrs) {
2790 case MRRS_128B:
2791 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
2792 break;
2793 case MRRS_256B:
2794 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
2795 break;
2796 default:
2797 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
2798 break;
2799 };
2800
2801 /*
2802 * Must check before reset_mac_processor
2803 */
2804 jme_check_hw_ver(jme);
2805 jme->mii_if.dev = netdev;
2806 if (jme->fpgaver) {
2807 jme->mii_if.phy_id = 0;
2808 for (i = 1 ; i < 32 ; ++i) {
2809 bmcr = jme_mdio_read(netdev, i, MII_BMCR);
2810 bmsr = jme_mdio_read(netdev, i, MII_BMSR);
2811 if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) {
2812 jme->mii_if.phy_id = i;
2813 break;
2814 }
2815 }
2816
2817 if (!jme->mii_if.phy_id) {
2818 rc = -EIO;
2819 jeprintk(pdev, "Can not find phy_id.\n");
2820 goto err_out_free_shadow;
2821 }
2822
2823 jme->reg_ghc |= GHC_LINK_POLL;
2824 } else {
2825 jme->mii_if.phy_id = 1;
2826 }
2827 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
2828 jme->mii_if.supports_gmii = true;
2829 else
2830 jme->mii_if.supports_gmii = false;
2831 jme->mii_if.mdio_read = jme_mdio_read;
2832 jme->mii_if.mdio_write = jme_mdio_write;
2833
2834 jme_clear_pm(jme);
2835 jme_set_phyfifoa(jme);
2836 pci_read_config_byte(pdev, PCI_REVISION_ID, &jme->rev);
2837 if (!jme->fpgaver)
2838 jme_phy_init(jme);
2839 jme_phy_off(jme);
2840
2841 /*
2842 * Reset MAC processor and reload EEPROM for MAC Address
2843 */
2844 jme_reset_mac_processor(jme);
2845 rc = jme_reload_eeprom(jme);
2846 if (rc) {
2847 jeprintk(pdev,
2848 "Reload eeprom for reading MAC Address error.\n");
2849 goto err_out_free_shadow;
2850 }
2851 jme_load_macaddr(netdev);
2852
2853 /*
2854 * Tell stack that we are not ready to work until open()
2855 */
2856 netif_carrier_off(netdev);
2857 netif_stop_queue(netdev);
2858
2859 /*
2860 * Register netdev
2861 */
2862 rc = register_netdev(netdev);
2863 if (rc) {
2864 jeprintk(pdev, "Cannot register net device.\n");
2865 goto err_out_free_shadow;
2866 }
2867
2868 msg_probe(jme, "%s%s ver:%x rev:%x macaddr:%pM\n",
2869 (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) ?
2870 "JMC250 Gigabit Ethernet" :
2871 (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC260) ?
2872 "JMC260 Fast Ethernet" : "Unknown",
2873 (jme->fpgaver != 0) ? " (FPGA)" : "",
2874 (jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev,
2875 jme->rev, netdev->dev_addr);
2876
2877 return 0;
2878
2879err_out_free_shadow:
2880 pci_free_consistent(pdev,
2881 sizeof(u32) * SHADOW_REG_NR,
2882 jme->shadow_regs,
2883 jme->shadow_dma);
2884err_out_unmap:
2885 iounmap(jme->regs);
2886err_out_free_netdev:
2887 pci_set_drvdata(pdev, NULL);
2888 free_netdev(netdev);
2889err_out_release_regions:
2890 pci_release_regions(pdev);
2891err_out_disable_pdev:
2892 pci_disable_device(pdev);
2893err_out:
2894 return rc;
2895}
2896
2897static void __devexit
2898jme_remove_one(struct pci_dev *pdev)
2899{
2900 struct net_device *netdev = pci_get_drvdata(pdev);
2901 struct jme_adapter *jme = netdev_priv(netdev);
2902
2903 unregister_netdev(netdev);
2904 pci_free_consistent(pdev,
2905 sizeof(u32) * SHADOW_REG_NR,
2906 jme->shadow_regs,
2907 jme->shadow_dma);
2908 iounmap(jme->regs);
2909 pci_set_drvdata(pdev, NULL);
2910 free_netdev(netdev);
2911 pci_release_regions(pdev);
2912 pci_disable_device(pdev);
2913
2914}
2915
2916#ifdef CONFIG_PM
2917static int
2918jme_suspend(struct pci_dev *pdev, pm_message_t state)
2919{
2920 struct net_device *netdev = pci_get_drvdata(pdev);
2921 struct jme_adapter *jme = netdev_priv(netdev);
2922
2923 atomic_dec(&jme->link_changing);
2924
2925 netif_device_detach(netdev);
2926 netif_stop_queue(netdev);
2927 jme_stop_irq(jme);
2928
2929 tasklet_disable(&jme->txclean_task);
2930 tasklet_disable(&jme->rxclean_task);
2931 tasklet_disable(&jme->rxempty_task);
2932
2933 jme_disable_shadow(jme);
2934
2935 if (netif_carrier_ok(netdev)) {
2936 if (test_bit(JME_FLAG_POLL, &jme->flags))
2937 jme_polling_mode(jme);
2938
2939 jme_stop_pcc_timer(jme);
2940 jme_reset_ghc_speed(jme);
2941 jme_disable_rx_engine(jme);
2942 jme_disable_tx_engine(jme);
2943 jme_reset_mac_processor(jme);
2944 jme_free_rx_resources(jme);
2945 jme_free_tx_resources(jme);
2946 netif_carrier_off(netdev);
2947 jme->phylink = 0;
2948 }
2949
2950 tasklet_enable(&jme->txclean_task);
2951 tasklet_hi_enable(&jme->rxclean_task);
2952 tasklet_hi_enable(&jme->rxempty_task);
2953
2954 pci_save_state(pdev);
2955 if (jme->reg_pmcs) {
2956 jme_set_100m_half(jme);
2957
2958 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2959 jme_wait_link(jme);
2960
2961 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2962
2963 pci_enable_wake(pdev, PCI_D3cold, true);
2964 } else {
2965 jme_phy_off(jme);
2966 }
2967 pci_set_power_state(pdev, PCI_D3cold);
2968
2969 return 0;
2970}
2971
2972static int
2973jme_resume(struct pci_dev *pdev)
2974{
2975 struct net_device *netdev = pci_get_drvdata(pdev);
2976 struct jme_adapter *jme = netdev_priv(netdev);
2977
2978 jme_clear_pm(jme);
2979 pci_restore_state(pdev);
2980
2981 if (test_bit(JME_FLAG_SSET, &jme->flags))
2982 jme_set_settings(netdev, &jme->old_ecmd);
2983 else
2984 jme_reset_phy_processor(jme);
2985
2986 jme_enable_shadow(jme);
2987 jme_start_irq(jme);
2988 netif_device_attach(netdev);
2989
2990 atomic_inc(&jme->link_changing);
2991
2992 jme_reset_link(jme);
2993
2994 return 0;
2995}
2996#endif
2997
2998static struct pci_device_id jme_pci_tbl[] = {
2999 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) },
3000 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) },
3001 { }
3002};
3003
3004static struct pci_driver jme_driver = {
3005 .name = DRV_NAME,
3006 .id_table = jme_pci_tbl,
3007 .probe = jme_init_one,
3008 .remove = __devexit_p(jme_remove_one),
3009#ifdef CONFIG_PM
3010 .suspend = jme_suspend,
3011 .resume = jme_resume,
3012#endif /* CONFIG_PM */
3013};
3014
3015static int __init
3016jme_init_module(void)
3017{
3018 printk(KERN_INFO PFX "JMicron JMC2XX ethernet "
3019 "driver version %s\n", DRV_VERSION);
3020 return pci_register_driver(&jme_driver);
3021}
3022
3023static void __exit
3024jme_cleanup_module(void)
3025{
3026 pci_unregister_driver(&jme_driver);
3027}
3028
3029module_init(jme_init_module);
3030module_exit(jme_cleanup_module);
3031
3032MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
3033MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
3034MODULE_LICENSE("GPL");
3035MODULE_VERSION(DRV_VERSION);
3036MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
3037
JMicron Ethernet Linux driver