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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / net / jme.c
blob3ac262f55633387d46947ca2d2c2259e1736867b
1 /*
2 * JMicron JMC2x0 series PCIe Ethernet Linux Device Driver
3 *
4 * Copyright 2008 JMicron Technology Corporation
5 * http://www.jmicron.com/
6 * Copyright (c) 2009 - 2010 Guo-Fu Tseng <cooldavid@cooldavid.org>
7 *
8 * Author: Guo-Fu Tseng <cooldavid@cooldavid.org>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 */
24
25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
26
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/pci.h>
30 #include <linux/netdevice.h>
31 #include <linux/etherdevice.h>
32 #include <linux/ethtool.h>
33 #include <linux/mii.h>
34 #include <linux/crc32.h>
35 #include <linux/delay.h>
36 #include <linux/spinlock.h>
37 #include <linux/in.h>
38 #include <linux/ip.h>
39 #include <linux/ipv6.h>
40 #include <linux/tcp.h>
41 #include <linux/udp.h>
42 #include <linux/if_vlan.h>
43 #include <linux/slab.h>
44 #include <net/ip6_checksum.h>
45 #include "jme.h"
46
47 static int force_pseudohp = -1;
48 static int no_pseudohp = -1;
49 static int no_extplug = -1;
50 module_param(force_pseudohp, int, 0);
51 MODULE_PARM_DESC(force_pseudohp,
52 "Enable pseudo hot-plug feature manually by driver instead of BIOS.");
53 module_param(no_pseudohp, int, 0);
54 MODULE_PARM_DESC(no_pseudohp, "Disable pseudo hot-plug feature.");
55 module_param(no_extplug, int, 0);
56 MODULE_PARM_DESC(no_extplug,
57 "Do not use external plug signal for pseudo hot-plug.");
58
59 static int
60 jme_mdio_read(struct net_device *netdev, int phy, int reg)
61 {
62 struct jme_adapter *jme = netdev_priv(netdev);
63 int i, val, again = (reg == MII_BMSR) ? 1 : 0;
64
65 read_again:
66 jwrite32(jme, JME_SMI, SMI_OP_REQ |
67 smi_phy_addr(phy) |
68 smi_reg_addr(reg));
69
70 wmb();
71 for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
72 udelay(20);
73 val = jread32(jme, JME_SMI);
74 if ((val & SMI_OP_REQ) == 0)
75 break;
76 }
77
78 if (i == 0) {
79 pr_err("phy(%d) read timeout : %d\n", phy, reg);
80 return 0;
81 }
82
83 if (again--)
84 goto read_again;
85
86 return (val & SMI_DATA_MASK) >> SMI_DATA_SHIFT;
87 }
88
89 static void
90 jme_mdio_write(struct net_device *netdev,
91 int phy, int reg, int val)
92 {
93 struct jme_adapter *jme = netdev_priv(netdev);
94 int i;
95
96 jwrite32(jme, JME_SMI, SMI_OP_WRITE | SMI_OP_REQ |
97 ((val << SMI_DATA_SHIFT) & SMI_DATA_MASK) |
98 smi_phy_addr(phy) | smi_reg_addr(reg));
99
100 wmb();
101 for (i = JME_PHY_TIMEOUT * 50 ; i > 0 ; --i) {
102 udelay(20);
103 if ((jread32(jme, JME_SMI) & SMI_OP_REQ) == 0)
104 break;
105 }
106
107 if (i == 0)
108 pr_err("phy(%d) write timeout : %d\n", phy, reg);
109 }
110
111 static inline void
112 jme_reset_phy_processor(struct jme_adapter *jme)
113 {
114 u32 val;
115
116 jme_mdio_write(jme->dev,
117 jme->mii_if.phy_id,
118 MII_ADVERTISE, ADVERTISE_ALL |
119 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
120
121 if (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
122 jme_mdio_write(jme->dev,
123 jme->mii_if.phy_id,
124 MII_CTRL1000,
125 ADVERTISE_1000FULL | ADVERTISE_1000HALF);
126
127 val = jme_mdio_read(jme->dev,
128 jme->mii_if.phy_id,
129 MII_BMCR);
130
131 jme_mdio_write(jme->dev,
132 jme->mii_if.phy_id,
133 MII_BMCR, val | BMCR_RESET);
134 }
135
136 static void
137 jme_setup_wakeup_frame(struct jme_adapter *jme,
138 const 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
163 static inline void
164 jme_mac_rxclk_off(struct jme_adapter *jme)
165 {
166 jme->reg_gpreg1 |= GPREG1_RXCLKOFF;
167 jwrite32f(jme, JME_GPREG1, jme->reg_gpreg1);
168 }
169
170 static inline void
171 jme_mac_rxclk_on(struct jme_adapter *jme)
172 {
173 jme->reg_gpreg1 &= ~GPREG1_RXCLKOFF;
174 jwrite32f(jme, JME_GPREG1, jme->reg_gpreg1);
175 }
176
177 static inline void
178 jme_mac_txclk_off(struct jme_adapter *jme)
179 {
180 jme->reg_ghc &= ~(GHC_TO_CLK_SRC | GHC_TXMAC_CLK_SRC);
181 jwrite32f(jme, JME_GHC, jme->reg_ghc);
182 }
183
184 static inline void
185 jme_mac_txclk_on(struct jme_adapter *jme)
186 {
187 u32 speed = jme->reg_ghc & GHC_SPEED;
188 if (speed == GHC_SPEED_1000M)
189 jme->reg_ghc |= GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY;
190 else
191 jme->reg_ghc |= GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
192 jwrite32f(jme, JME_GHC, jme->reg_ghc);
193 }
194
195 static inline void
196 jme_reset_ghc_speed(struct jme_adapter *jme)
197 {
198 jme->reg_ghc &= ~(GHC_SPEED | GHC_DPX);
199 jwrite32f(jme, JME_GHC, jme->reg_ghc);
200 }
201
202 static inline void
203 jme_reset_250A2_workaround(struct jme_adapter *jme)
204 {
205 jme->reg_gpreg1 &= ~(GPREG1_HALFMODEPATCH |
206 GPREG1_RSSPATCH);
207 jwrite32(jme, JME_GPREG1, jme->reg_gpreg1);
208 }
209
210 static inline void
211 jme_assert_ghc_reset(struct jme_adapter *jme)
212 {
213 jme->reg_ghc |= GHC_SWRST;
214 jwrite32f(jme, JME_GHC, jme->reg_ghc);
215 }
216
217 static inline void
218 jme_clear_ghc_reset(struct jme_adapter *jme)
219 {
220 jme->reg_ghc &= ~GHC_SWRST;
221 jwrite32f(jme, JME_GHC, jme->reg_ghc);
222 }
223
224 static inline void
225 jme_reset_mac_processor(struct jme_adapter *jme)
226 {
227 static const u32 mask[WAKEUP_FRAME_MASK_DWNR] = {0, 0, 0, 0};
228 u32 crc = 0xCDCDCDCD;
229 u32 gpreg0;
230 int i;
231
232 jme_reset_ghc_speed(jme);
233 jme_reset_250A2_workaround(jme);
234
235 jme_mac_rxclk_on(jme);
236 jme_mac_txclk_on(jme);
237 udelay(1);
238 jme_assert_ghc_reset(jme);
239 udelay(1);
240 jme_mac_rxclk_off(jme);
241 jme_mac_txclk_off(jme);
242 udelay(1);
243 jme_clear_ghc_reset(jme);
244 udelay(1);
245 jme_mac_rxclk_on(jme);
246 jme_mac_txclk_on(jme);
247 udelay(1);
248 jme_mac_rxclk_off(jme);
249 jme_mac_txclk_off(jme);
250
251 jwrite32(jme, JME_RXDBA_LO, 0x00000000);
252 jwrite32(jme, JME_RXDBA_HI, 0x00000000);
253 jwrite32(jme, JME_RXQDC, 0x00000000);
254 jwrite32(jme, JME_RXNDA, 0x00000000);
255 jwrite32(jme, JME_TXDBA_LO, 0x00000000);
256 jwrite32(jme, JME_TXDBA_HI, 0x00000000);
257 jwrite32(jme, JME_TXQDC, 0x00000000);
258 jwrite32(jme, JME_TXNDA, 0x00000000);
259
260 jwrite32(jme, JME_RXMCHT_LO, 0x00000000);
261 jwrite32(jme, JME_RXMCHT_HI, 0x00000000);
262 for (i = 0 ; i < WAKEUP_FRAME_NR ; ++i)
263 jme_setup_wakeup_frame(jme, mask, crc, i);
264 if (jme->fpgaver)
265 gpreg0 = GPREG0_DEFAULT | GPREG0_LNKINTPOLL;
266 else
267 gpreg0 = GPREG0_DEFAULT;
268 jwrite32(jme, JME_GPREG0, gpreg0);
269 }
270
271 static inline void
272 jme_clear_pm(struct jme_adapter *jme)
273 {
274 jwrite32(jme, JME_PMCS, PMCS_STMASK | jme->reg_pmcs);
275 }
276
277 static int
278 jme_reload_eeprom(struct jme_adapter *jme)
279 {
280 u32 val;
281 int i;
282
283 val = jread32(jme, JME_SMBCSR);
284
285 if (val & SMBCSR_EEPROMD) {
286 val |= SMBCSR_CNACK;
287 jwrite32(jme, JME_SMBCSR, val);
288 val |= SMBCSR_RELOAD;
289 jwrite32(jme, JME_SMBCSR, val);
290 mdelay(12);
291
292 for (i = JME_EEPROM_RELOAD_TIMEOUT; i > 0; --i) {
293 mdelay(1);
294 if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0)
295 break;
296 }
297
298 if (i == 0) {
299 pr_err("eeprom reload timeout\n");
300 return -EIO;
301 }
302 }
303
304 return 0;
305 }
306
307 static void
308 jme_load_macaddr(struct net_device *netdev)
309 {
310 struct jme_adapter *jme = netdev_priv(netdev);
311 unsigned char macaddr[6];
312 u32 val;
313
314 spin_lock_bh(&jme->macaddr_lock);
315 val = jread32(jme, JME_RXUMA_LO);
316 macaddr[0] = (val >> 0) & 0xFF;
317 macaddr[1] = (val >> 8) & 0xFF;
318 macaddr[2] = (val >> 16) & 0xFF;
319 macaddr[3] = (val >> 24) & 0xFF;
320 val = jread32(jme, JME_RXUMA_HI);
321 macaddr[4] = (val >> 0) & 0xFF;
322 macaddr[5] = (val >> 8) & 0xFF;
323 memcpy(netdev->dev_addr, macaddr, 6);
324 spin_unlock_bh(&jme->macaddr_lock);
325 }
326
327 static inline void
328 jme_set_rx_pcc(struct jme_adapter *jme, int p)
329 {
330 switch (p) {
331 case PCC_OFF:
332 jwrite32(jme, JME_PCCRX0,
333 ((PCC_OFF_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
334 ((PCC_OFF_CNT << PCCRX_SHIFT) & PCCRX_MASK));
335 break;
336 case PCC_P1:
337 jwrite32(jme, JME_PCCRX0,
338 ((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
339 ((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK));
340 break;
341 case PCC_P2:
342 jwrite32(jme, JME_PCCRX0,
343 ((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
344 ((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK));
345 break;
346 case PCC_P3:
347 jwrite32(jme, JME_PCCRX0,
348 ((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
349 ((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK));
350 break;
351 default:
352 break;
353 }
354 wmb();
355
356 if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
357 netif_info(jme, rx_status, jme->dev, "Switched to PCC_P%d\n", p);
358 }
359
360 static void
361 jme_start_irq(struct jme_adapter *jme)
362 {
363 register struct dynpcc_info *dpi = &(jme->dpi);
364
365 jme_set_rx_pcc(jme, PCC_P1);
366 dpi->cur = PCC_P1;
367 dpi->attempt = PCC_P1;
368 dpi->cnt = 0;
369
370 jwrite32(jme, JME_PCCTX,
371 ((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
372 ((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) |
373 PCCTXQ0_EN
374 );
375
376 /*
377 * Enable Interrupts
378 */
379 jwrite32(jme, JME_IENS, INTR_ENABLE);
380 }
381
382 static inline void
383 jme_stop_irq(struct jme_adapter *jme)
384 {
385 /*
386 * Disable Interrupts
387 */
388 jwrite32f(jme, JME_IENC, INTR_ENABLE);
389 }
390
391 static u32
392 jme_linkstat_from_phy(struct jme_adapter *jme)
393 {
394 u32 phylink, bmsr;
395
396 phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17);
397 bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR);
398 if (bmsr & BMSR_ANCOMP)
399 phylink |= PHY_LINK_AUTONEG_COMPLETE;
400
401 return phylink;
402 }
403
404 static inline void
405 jme_set_phyfifo_5level(struct jme_adapter *jme)
406 {
407 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004);
408 }
409
410 static inline void
411 jme_set_phyfifo_8level(struct jme_adapter *jme)
412 {
413 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000);
414 }
415
416 static int
417 jme_check_link(struct net_device *netdev, int testonly)
418 {
419 struct jme_adapter *jme = netdev_priv(netdev);
420 u32 phylink, cnt = JME_SPDRSV_TIMEOUT, bmcr;
421 char linkmsg[64];
422 int rc = 0;
423
424 linkmsg[0] = '\0';
425
426 if (jme->fpgaver)
427 phylink = jme_linkstat_from_phy(jme);
428 else
429 phylink = jread32(jme, JME_PHY_LINK);
430
431 if (phylink & PHY_LINK_UP) {
432 if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
433 /*
434 * If we did not enable AN
435 * Speed/Duplex Info should be obtained from SMI
436 */
437 phylink = PHY_LINK_UP;
438
439 bmcr = jme_mdio_read(jme->dev,
440 jme->mii_if.phy_id,
441 MII_BMCR);
442
443 phylink |= ((bmcr & BMCR_SPEED1000) &&
444 (bmcr & BMCR_SPEED100) == 0) ?
445 PHY_LINK_SPEED_1000M :
446 (bmcr & BMCR_SPEED100) ?
447 PHY_LINK_SPEED_100M :
448 PHY_LINK_SPEED_10M;
449
450 phylink |= (bmcr & BMCR_FULLDPLX) ?
451 PHY_LINK_DUPLEX : 0;
452
453 strcat(linkmsg, "Forced: ");
454 } else {
455 /*
456 * Keep polling for speed/duplex resolve complete
457 */
458 while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
459 --cnt) {
460
461 udelay(1);
462
463 if (jme->fpgaver)
464 phylink = jme_linkstat_from_phy(jme);
465 else
466 phylink = jread32(jme, JME_PHY_LINK);
467 }
468 if (!cnt)
469 pr_err("Waiting speed resolve timeout\n");
470
471 strcat(linkmsg, "ANed: ");
472 }
473
474 if (jme->phylink == phylink) {
475 rc = 1;
476 goto out;
477 }
478 if (testonly)
479 goto out;
480
481 jme->phylink = phylink;
482
483 /*
484 * The speed/duplex setting of jme->reg_ghc already cleared
485 * by jme_reset_mac_processor()
486 */
487 switch (phylink & PHY_LINK_SPEED_MASK) {
488 case PHY_LINK_SPEED_10M:
489 jme->reg_ghc |= GHC_SPEED_10M;
490 strcat(linkmsg, "10 Mbps, ");
491 break;
492 case PHY_LINK_SPEED_100M:
493 jme->reg_ghc |= GHC_SPEED_100M;
494 strcat(linkmsg, "100 Mbps, ");
495 break;
496 case PHY_LINK_SPEED_1000M:
497 jme->reg_ghc |= GHC_SPEED_1000M;
498 strcat(linkmsg, "1000 Mbps, ");
499 break;
500 default:
501 break;
502 }
503
504 if (phylink & PHY_LINK_DUPLEX) {
505 jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
506 jwrite32(jme, JME_TXTRHD, TXTRHD_FULLDUPLEX);
507 jme->reg_ghc |= GHC_DPX;
508 } else {
509 jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
510 TXMCS_BACKOFF |
511 TXMCS_CARRIERSENSE |
512 TXMCS_COLLISION);
513 jwrite32(jme, JME_TXTRHD, TXTRHD_HALFDUPLEX);
514 }
515
516 jwrite32(jme, JME_GHC, jme->reg_ghc);
517
518 if (is_buggy250(jme->pdev->device, jme->chiprev)) {
519 jme->reg_gpreg1 &= ~(GPREG1_HALFMODEPATCH |
520 GPREG1_RSSPATCH);
521 if (!(phylink & PHY_LINK_DUPLEX))
522 jme->reg_gpreg1 |= GPREG1_HALFMODEPATCH;
523 switch (phylink & PHY_LINK_SPEED_MASK) {
524 case PHY_LINK_SPEED_10M:
525 jme_set_phyfifo_8level(jme);
526 jme->reg_gpreg1 |= GPREG1_RSSPATCH;
527 break;
528 case PHY_LINK_SPEED_100M:
529 jme_set_phyfifo_5level(jme);
530 jme->reg_gpreg1 |= GPREG1_RSSPATCH;
531 break;
532 case PHY_LINK_SPEED_1000M:
533 jme_set_phyfifo_8level(jme);
534 break;
535 default:
536 break;
537 }
538 }
539 jwrite32(jme, JME_GPREG1, jme->reg_gpreg1);
540
541 strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
542 "Full-Duplex, " :
543 "Half-Duplex, ");
544 strcat(linkmsg, (phylink & PHY_LINK_MDI_STAT) ?
545 "MDI-X" :
546 "MDI");
547 netif_info(jme, link, jme->dev, "Link is up at %s\n", linkmsg);
548 netif_carrier_on(netdev);
549 } else {
550 if (testonly)
551 goto out;
552
553 netif_info(jme, link, jme->dev, "Link is down\n");
554 jme->phylink = 0;
555 netif_carrier_off(netdev);
556 }
557
558 out:
559 return rc;
560 }
561
562 static int
563 jme_setup_tx_resources(struct jme_adapter *jme)
564 {
565 struct jme_ring *txring = &(jme->txring[0]);
566
567 txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
568 TX_RING_ALLOC_SIZE(jme->tx_ring_size),
569 &(txring->dmaalloc),
570 GFP_ATOMIC);
571
572 if (!txring->alloc)
573 goto err_set_null;
574
575 /*
576 * 16 Bytes align
577 */
578 txring->desc = (void *)ALIGN((unsigned long)(txring->alloc),
579 RING_DESC_ALIGN);
580 txring->dma = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
581 txring->next_to_use = 0;
582 atomic_set(&txring->next_to_clean, 0);
583 atomic_set(&txring->nr_free, jme->tx_ring_size);
584
585 txring->bufinf = kmalloc(sizeof(struct jme_buffer_info) *
586 jme->tx_ring_size, GFP_ATOMIC);
587 if (unlikely(!(txring->bufinf)))
588 goto err_free_txring;
589
590 /*
591 * Initialize Transmit Descriptors
592 */
593 memset(txring->alloc, 0, TX_RING_ALLOC_SIZE(jme->tx_ring_size));
594 memset(txring->bufinf, 0,
595 sizeof(struct jme_buffer_info) * jme->tx_ring_size);
596
597 return 0;
598
599 err_free_txring:
600 dma_free_coherent(&(jme->pdev->dev),
601 TX_RING_ALLOC_SIZE(jme->tx_ring_size),
602 txring->alloc,
603 txring->dmaalloc);
604
605 err_set_null:
606 txring->desc = NULL;
607 txring->dmaalloc = 0;
608 txring->dma = 0;
609 txring->bufinf = NULL;
610
611 return -ENOMEM;
612 }
613
614 static void
615 jme_free_tx_resources(struct jme_adapter *jme)
616 {
617 int i;
618 struct jme_ring *txring = &(jme->txring[0]);
619 struct jme_buffer_info *txbi;
620
621 if (txring->alloc) {
622 if (txring->bufinf) {
623 for (i = 0 ; i < jme->tx_ring_size ; ++i) {
624 txbi = txring->bufinf + i;
625 if (txbi->skb) {
626 dev_kfree_skb(txbi->skb);
627 txbi->skb = NULL;
628 }
629 txbi->mapping = 0;
630 txbi->len = 0;
631 txbi->nr_desc = 0;
632 txbi->start_xmit = 0;
633 }
634 kfree(txring->bufinf);
635 }
636
637 dma_free_coherent(&(jme->pdev->dev),
638 TX_RING_ALLOC_SIZE(jme->tx_ring_size),
639 txring->alloc,
640 txring->dmaalloc);
641
642 txring->alloc = NULL;
643 txring->desc = NULL;
644 txring->dmaalloc = 0;
645 txring->dma = 0;
646 txring->bufinf = NULL;
647 }
648 txring->next_to_use = 0;
649 atomic_set(&txring->next_to_clean, 0);
650 atomic_set(&txring->nr_free, 0);
651 }
652
653 static inline void
654 jme_enable_tx_engine(struct jme_adapter *jme)
655 {
656 /*
657 * Select Queue 0
658 */
659 jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
660 wmb();
661
662 /*
663 * Setup TX Queue 0 DMA Bass Address
664 */
665 jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
666 jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
667 jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
668
669 /*
670 * Setup TX Descptor Count
671 */
672 jwrite32(jme, JME_TXQDC, jme->tx_ring_size);
673
674 /*
675 * Enable TX Engine
676 */
677 wmb();
678 jwrite32f(jme, JME_TXCS, jme->reg_txcs |
679 TXCS_SELECT_QUEUE0 |
680 TXCS_ENABLE);
681
682 /*
683 * Start clock for TX MAC Processor
684 */
685 jme_mac_txclk_on(jme);
686 }
687
688 static inline void
689 jme_restart_tx_engine(struct jme_adapter *jme)
690 {
691 /*
692 * Restart TX Engine
693 */
694 jwrite32(jme, JME_TXCS, jme->reg_txcs |
695 TXCS_SELECT_QUEUE0 |
696 TXCS_ENABLE);
697 }
698
699 static inline void
700 jme_disable_tx_engine(struct jme_adapter *jme)
701 {
702 int i;
703 u32 val;
704
705 /*
706 * Disable TX Engine
707 */
708 jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
709 wmb();
710
711 val = jread32(jme, JME_TXCS);
712 for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) {
713 mdelay(1);
714 val = jread32(jme, JME_TXCS);
715 rmb();
716 }
717
718 if (!i)
719 pr_err("Disable TX engine timeout\n");
720
721 /*
722 * Stop clock for TX MAC Processor
723 */
724 jme_mac_txclk_off(jme);
725 }
726
727 static void
728 jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
729 {
730 struct jme_ring *rxring = &(jme->rxring[0]);
731 register struct rxdesc *rxdesc = rxring->desc;
732 struct jme_buffer_info *rxbi = rxring->bufinf;
733 rxdesc += i;
734 rxbi += i;
735
736 rxdesc->dw[0] = 0;
737 rxdesc->dw[1] = 0;
738 rxdesc->desc1.bufaddrh = cpu_to_le32((__u64)rxbi->mapping >> 32);
739 rxdesc->desc1.bufaddrl = cpu_to_le32(
740 (__u64)rxbi->mapping & 0xFFFFFFFFUL);
741 rxdesc->desc1.datalen = cpu_to_le16(rxbi->len);
742 if (jme->dev->features & NETIF_F_HIGHDMA)
743 rxdesc->desc1.flags = RXFLAG_64BIT;
744 wmb();
745 rxdesc->desc1.flags |= RXFLAG_OWN | RXFLAG_INT;
746 }
747
748 static int
749 jme_make_new_rx_buf(struct jme_adapter *jme, int i)
750 {
751 struct jme_ring *rxring = &(jme->rxring[0]);
752 struct jme_buffer_info *rxbi = rxring->bufinf + i;
753 struct sk_buff *skb;
754 dma_addr_t mapping;
755
756 skb = netdev_alloc_skb(jme->dev,
757 jme->dev->mtu + RX_EXTRA_LEN);
758 if (unlikely(!skb))
759 return -ENOMEM;
760
761 mapping = pci_map_page(jme->pdev, virt_to_page(skb->data),
762 offset_in_page(skb->data), skb_tailroom(skb),
763 PCI_DMA_FROMDEVICE);
764 if (unlikely(pci_dma_mapping_error(jme->pdev, mapping))) {
765 dev_kfree_skb(skb);
766 return -ENOMEM;
767 }
768
769 if (likely(rxbi->mapping))
770 pci_unmap_page(jme->pdev, rxbi->mapping,
771 rxbi->len, PCI_DMA_FROMDEVICE);
772
773 rxbi->skb = skb;
774 rxbi->len = skb_tailroom(skb);
775 rxbi->mapping = mapping;
776 return 0;
777 }
778
779 static void
780 jme_free_rx_buf(struct jme_adapter *jme, int i)
781 {
782 struct jme_ring *rxring = &(jme->rxring[0]);
783 struct jme_buffer_info *rxbi = rxring->bufinf;
784 rxbi += i;
785
786 if (rxbi->skb) {
787 pci_unmap_page(jme->pdev,
788 rxbi->mapping,
789 rxbi->len,
790 PCI_DMA_FROMDEVICE);
791 dev_kfree_skb(rxbi->skb);
792 rxbi->skb = NULL;
793 rxbi->mapping = 0;
794 rxbi->len = 0;
795 }
796 }
797
798 static void
799 jme_free_rx_resources(struct jme_adapter *jme)
800 {
801 int i;
802 struct jme_ring *rxring = &(jme->rxring[0]);
803
804 if (rxring->alloc) {
805 if (rxring->bufinf) {
806 for (i = 0 ; i < jme->rx_ring_size ; ++i)
807 jme_free_rx_buf(jme, i);
808 kfree(rxring->bufinf);
809 }
810
811 dma_free_coherent(&(jme->pdev->dev),
812 RX_RING_ALLOC_SIZE(jme->rx_ring_size),
813 rxring->alloc,
814 rxring->dmaalloc);
815 rxring->alloc = NULL;
816 rxring->desc = NULL;
817 rxring->dmaalloc = 0;
818 rxring->dma = 0;
819 rxring->bufinf = NULL;
820 }
821 rxring->next_to_use = 0;
822 atomic_set(&rxring->next_to_clean, 0);
823 }
824
825 static int
826 jme_setup_rx_resources(struct jme_adapter *jme)
827 {
828 int i;
829 struct jme_ring *rxring = &(jme->rxring[0]);
830
831 rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
832 RX_RING_ALLOC_SIZE(jme->rx_ring_size),
833 &(rxring->dmaalloc),
834 GFP_ATOMIC);
835 if (!rxring->alloc)
836 goto err_set_null;
837
838 /*
839 * 16 Bytes align
840 */
841 rxring->desc = (void *)ALIGN((unsigned long)(rxring->alloc),
842 RING_DESC_ALIGN);
843 rxring->dma = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
844 rxring->next_to_use = 0;
845 atomic_set(&rxring->next_to_clean, 0);
846
847 rxring->bufinf = kmalloc(sizeof(struct jme_buffer_info) *
848 jme->rx_ring_size, GFP_ATOMIC);
849 if (unlikely(!(rxring->bufinf)))
850 goto err_free_rxring;
851
852 /*
853 * Initiallize Receive Descriptors
854 */
855 memset(rxring->bufinf, 0,
856 sizeof(struct jme_buffer_info) * jme->rx_ring_size);
857 for (i = 0 ; i < jme->rx_ring_size ; ++i) {
858 if (unlikely(jme_make_new_rx_buf(jme, i))) {
859 jme_free_rx_resources(jme);
860 return -ENOMEM;
861 }
862
863 jme_set_clean_rxdesc(jme, i);
864 }
865
866 return 0;
867
868 err_free_rxring:
869 dma_free_coherent(&(jme->pdev->dev),
870 RX_RING_ALLOC_SIZE(jme->rx_ring_size),
871 rxring->alloc,
872 rxring->dmaalloc);
873 err_set_null:
874 rxring->desc = NULL;
875 rxring->dmaalloc = 0;
876 rxring->dma = 0;
877 rxring->bufinf = NULL;
878
879 return -ENOMEM;
880 }
881
882 static inline void
883 jme_enable_rx_engine(struct jme_adapter *jme)
884 {
885 /*
886 * Select Queue 0
887 */
888 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
889 RXCS_QUEUESEL_Q0);
890 wmb();
891
892 /*
893 * Setup RX DMA Bass Address
894 */
895 jwrite32(jme, JME_RXDBA_LO, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
896 jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
897 jwrite32(jme, JME_RXNDA, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
898
899 /*
900 * Setup RX Descriptor Count
901 */
902 jwrite32(jme, JME_RXQDC, jme->rx_ring_size);
903
904 /*
905 * Setup Unicast Filter
906 */
907 jme_set_unicastaddr(jme->dev);
908 jme_set_multi(jme->dev);
909
910 /*
911 * Enable RX Engine
912 */
913 wmb();
914 jwrite32f(jme, JME_RXCS, jme->reg_rxcs |
915 RXCS_QUEUESEL_Q0 |
916 RXCS_ENABLE |
917 RXCS_QST);
918
919 /*
920 * Start clock for RX MAC Processor
921 */
922 jme_mac_rxclk_on(jme);
923 }
924
925 static inline void
926 jme_restart_rx_engine(struct jme_adapter *jme)
927 {
928 /*
929 * Start RX Engine
930 */
931 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
932 RXCS_QUEUESEL_Q0 |
933 RXCS_ENABLE |
934 RXCS_QST);
935 }
936
937 static inline void
938 jme_disable_rx_engine(struct jme_adapter *jme)
939 {
940 int i;
941 u32 val;
942
943 /*
944 * Disable RX Engine
945 */
946 jwrite32(jme, JME_RXCS, jme->reg_rxcs);
947 wmb();
948
949 val = jread32(jme, JME_RXCS);
950 for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) {
951 mdelay(1);
952 val = jread32(jme, JME_RXCS);
953 rmb();
954 }
955
956 if (!i)
957 pr_err("Disable RX engine timeout\n");
958
959 /*
960 * Stop clock for RX MAC Processor
961 */
962 jme_mac_rxclk_off(jme);
963 }
964
965 static u16
966 jme_udpsum(struct sk_buff *skb)
967 {
968 u16 csum = 0xFFFFu;
969
970 if (skb->len < (ETH_HLEN + sizeof(struct iphdr)))
971 return csum;
972 if (skb->protocol != htons(ETH_P_IP))
973 return csum;
974 skb_set_network_header(skb, ETH_HLEN);
975 if ((ip_hdr(skb)->protocol != IPPROTO_UDP) ||
976 (skb->len < (ETH_HLEN +
977 (ip_hdr(skb)->ihl << 2) +
978 sizeof(struct udphdr)))) {
979 skb_reset_network_header(skb);
980 return csum;
981 }
982 skb_set_transport_header(skb,
983 ETH_HLEN + (ip_hdr(skb)->ihl << 2));
984 csum = udp_hdr(skb)->check;
985 skb_reset_transport_header(skb);
986 skb_reset_network_header(skb);
987
988 return csum;
989 }
990
991 static int
992 jme_rxsum_ok(struct jme_adapter *jme, u16 flags, struct sk_buff *skb)
993 {
994 if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
995 return false;
996
997 if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_TCPON | RXWBFLAG_TCPCS))
998 == RXWBFLAG_TCPON)) {
999 if (flags & RXWBFLAG_IPV4)
1000 netif_err(jme, rx_err, jme->dev, "TCP Checksum error\n");
1001 return false;
1002 }
1003
1004 if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_UDPON | RXWBFLAG_UDPCS))
1005 == RXWBFLAG_UDPON) && jme_udpsum(skb)) {
1006 if (flags & RXWBFLAG_IPV4)
1007 netif_err(jme, rx_err, jme->dev, "UDP Checksum error\n");
1008 return false;
1009 }
1010
1011 if (unlikely((flags & (RXWBFLAG_IPV4 | RXWBFLAG_IPCS))
1012 == RXWBFLAG_IPV4)) {
1013 netif_err(jme, rx_err, jme->dev, "IPv4 Checksum error\n");
1014 return false;
1015 }
1016
1017 return true;
1018 }
1019
1020 static void
1021 jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
1022 {
1023 struct jme_ring *rxring = &(jme->rxring[0]);
1024 struct rxdesc *rxdesc = rxring->desc;
1025 struct jme_buffer_info *rxbi = rxring->bufinf;
1026 struct sk_buff *skb;
1027 int framesize;
1028
1029 rxdesc += idx;
1030 rxbi += idx;
1031
1032 skb = rxbi->skb;
1033 pci_dma_sync_single_for_cpu(jme->pdev,
1034 rxbi->mapping,
1035 rxbi->len,
1036 PCI_DMA_FROMDEVICE);
1037
1038 if (unlikely(jme_make_new_rx_buf(jme, idx))) {
1039 pci_dma_sync_single_for_device(jme->pdev,
1040 rxbi->mapping,
1041 rxbi->len,
1042 PCI_DMA_FROMDEVICE);
1043
1044 ++(NET_STAT(jme).rx_dropped);
1045 } else {
1046 framesize = le16_to_cpu(rxdesc->descwb.framesize)
1047 - RX_PREPAD_SIZE;
1048
1049 skb_reserve(skb, RX_PREPAD_SIZE);
1050 skb_put(skb, framesize);
1051 skb->protocol = eth_type_trans(skb, jme->dev);
1052
1053 if (jme_rxsum_ok(jme, le16_to_cpu(rxdesc->descwb.flags), skb))
1054 skb->ip_summed = CHECKSUM_UNNECESSARY;
1055 else
1056 skb_checksum_none_assert(skb);
1057
1058 if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
1059 u16 vid = le16_to_cpu(rxdesc->descwb.vlan);
1060
1061 __vlan_hwaccel_put_tag(skb, vid);
1062 NET_STAT(jme).rx_bytes += 4;
1063 }
1064 jme->jme_rx(skb);
1065
1066 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
1067 cpu_to_le16(RXWBFLAG_DEST_MUL))
1068 ++(NET_STAT(jme).multicast);
1069
1070 NET_STAT(jme).rx_bytes += framesize;
1071 ++(NET_STAT(jme).rx_packets);
1072 }
1073
1074 jme_set_clean_rxdesc(jme, idx);
1075
1076 }
1077
1078 static int
1079 jme_process_receive(struct jme_adapter *jme, int limit)
1080 {
1081 struct jme_ring *rxring = &(jme->rxring[0]);
1082 struct rxdesc *rxdesc = rxring->desc;
1083 int i, j, ccnt, desccnt, mask = jme->rx_ring_mask;
1084
1085 if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
1086 goto out_inc;
1087
1088 if (unlikely(atomic_read(&jme->link_changing) != 1))
1089 goto out_inc;
1090
1091 if (unlikely(!netif_carrier_ok(jme->dev)))
1092 goto out_inc;
1093
1094 i = atomic_read(&rxring->next_to_clean);
1095 while (limit > 0) {
1096 rxdesc = rxring->desc;
1097 rxdesc += i;
1098
1099 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_OWN)) ||
1100 !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
1101 goto out;
1102 --limit;
1103
1104 rmb();
1105 desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
1106
1107 if (unlikely(desccnt > 1 ||
1108 rxdesc->descwb.errstat & RXWBERR_ALLERR)) {
1109
1110 if (rxdesc->descwb.errstat & RXWBERR_CRCERR)
1111 ++(NET_STAT(jme).rx_crc_errors);
1112 else if (rxdesc->descwb.errstat & RXWBERR_OVERUN)
1113 ++(NET_STAT(jme).rx_fifo_errors);
1114 else
1115 ++(NET_STAT(jme).rx_errors);
1116
1117 if (desccnt > 1)
1118 limit -= desccnt - 1;
1119
1120 for (j = i, ccnt = desccnt ; ccnt-- ; ) {
1121 jme_set_clean_rxdesc(jme, j);
1122 j = (j + 1) & (mask);
1123 }
1124
1125 } else {
1126 jme_alloc_and_feed_skb(jme, i);
1127 }
1128
1129 i = (i + desccnt) & (mask);
1130 }
1131
1132 out:
1133 atomic_set(&rxring->next_to_clean, i);
1134
1135 out_inc:
1136 atomic_inc(&jme->rx_cleaning);
1137
1138 return limit > 0 ? limit : 0;
1139
1140 }
1141
1142 static void
1143 jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
1144 {
1145 if (likely(atmp == dpi->cur)) {
1146 dpi->cnt = 0;
1147 return;
1148 }
1149
1150 if (dpi->attempt == atmp) {
1151 ++(dpi->cnt);
1152 } else {
1153 dpi->attempt = atmp;
1154 dpi->cnt = 0;
1155 }
1156
1157 }
1158
1159 static void
1160 jme_dynamic_pcc(struct jme_adapter *jme)
1161 {
1162 register struct dynpcc_info *dpi = &(jme->dpi);
1163
1164 if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
1165 jme_attempt_pcc(dpi, PCC_P3);
1166 else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD ||
1167 dpi->intr_cnt > PCC_INTR_THRESHOLD)
1168 jme_attempt_pcc(dpi, PCC_P2);
1169 else
1170 jme_attempt_pcc(dpi, PCC_P1);
1171
1172 if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
1173 if (dpi->attempt < dpi->cur)
1174 tasklet_schedule(&jme->rxclean_task);
1175 jme_set_rx_pcc(jme, dpi->attempt);
1176 dpi->cur = dpi->attempt;
1177 dpi->cnt = 0;
1178 }
1179 }
1180
1181 static void
1182 jme_start_pcc_timer(struct jme_adapter *jme)
1183 {
1184 struct dynpcc_info *dpi = &(jme->dpi);
1185 dpi->last_bytes = NET_STAT(jme).rx_bytes;
1186 dpi->last_pkts = NET_STAT(jme).rx_packets;
1187 dpi->intr_cnt = 0;
1188 jwrite32(jme, JME_TMCSR,
1189 TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
1190 }
1191
1192 static inline void
1193 jme_stop_pcc_timer(struct jme_adapter *jme)
1194 {
1195 jwrite32(jme, JME_TMCSR, 0);
1196 }
1197
1198 static void
1199 jme_shutdown_nic(struct jme_adapter *jme)
1200 {
1201 u32 phylink;
1202
1203 phylink = jme_linkstat_from_phy(jme);
1204
1205 if (!(phylink & PHY_LINK_UP)) {
1206 /*
1207 * Disable all interrupt before issue timer
1208 */
1209 jme_stop_irq(jme);
1210 jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE);
1211 }
1212 }
1213
1214 static void
1215 jme_pcc_tasklet(unsigned long arg)
1216 {
1217 struct jme_adapter *jme = (struct jme_adapter *)arg;
1218 struct net_device *netdev = jme->dev;
1219
1220 if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) {
1221 jme_shutdown_nic(jme);
1222 return;
1223 }
1224
1225 if (unlikely(!netif_carrier_ok(netdev) ||
1226 (atomic_read(&jme->link_changing) != 1)
1227 )) {
1228 jme_stop_pcc_timer(jme);
1229 return;
1230 }
1231
1232 if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
1233 jme_dynamic_pcc(jme);
1234
1235 jme_start_pcc_timer(jme);
1236 }
1237
1238 static inline void
1239 jme_polling_mode(struct jme_adapter *jme)
1240 {
1241 jme_set_rx_pcc(jme, PCC_OFF);
1242 }
1243
1244 static inline void
1245 jme_interrupt_mode(struct jme_adapter *jme)
1246 {
1247 jme_set_rx_pcc(jme, PCC_P1);
1248 }
1249
1250 static inline int
1251 jme_pseudo_hotplug_enabled(struct jme_adapter *jme)
1252 {
1253 u32 apmc;
1254 apmc = jread32(jme, JME_APMC);
1255 return apmc & JME_APMC_PSEUDO_HP_EN;
1256 }
1257
1258 static void
1259 jme_start_shutdown_timer(struct jme_adapter *jme)
1260 {
1261 u32 apmc;
1262
1263 apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN;
1264 apmc &= ~JME_APMC_EPIEN_CTRL;
1265 if (!no_extplug) {
1266 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN);
1267 wmb();
1268 }
1269 jwrite32f(jme, JME_APMC, apmc);
1270
1271 jwrite32f(jme, JME_TIMER2, 0);
1272 set_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1273 jwrite32(jme, JME_TMCSR,
1274 TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT));
1275 }
1276
1277 static void
1278 jme_stop_shutdown_timer(struct jme_adapter *jme)
1279 {
1280 u32 apmc;
1281
1282 jwrite32f(jme, JME_TMCSR, 0);
1283 jwrite32f(jme, JME_TIMER2, 0);
1284 clear_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1285
1286 apmc = jread32(jme, JME_APMC);
1287 apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL);
1288 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS);
1289 wmb();
1290 jwrite32f(jme, JME_APMC, apmc);
1291 }
1292
1293 static void
1294 jme_link_change_tasklet(unsigned long arg)
1295 {
1296 struct jme_adapter *jme = (struct jme_adapter *)arg;
1297 struct net_device *netdev = jme->dev;
1298 int rc;
1299
1300 while (!atomic_dec_and_test(&jme->link_changing)) {
1301 atomic_inc(&jme->link_changing);
1302 netif_info(jme, intr, jme->dev, "Get link change lock failed\n");
1303 while (atomic_read(&jme->link_changing) != 1)
1304 netif_info(jme, intr, jme->dev, "Waiting link change lock\n");
1305 }
1306
1307 if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
1308 goto out;
1309
1310 jme->old_mtu = netdev->mtu;
1311 netif_stop_queue(netdev);
1312 if (jme_pseudo_hotplug_enabled(jme))
1313 jme_stop_shutdown_timer(jme);
1314
1315 jme_stop_pcc_timer(jme);
1316 tasklet_disable(&jme->txclean_task);
1317 tasklet_disable(&jme->rxclean_task);
1318 tasklet_disable(&jme->rxempty_task);
1319
1320 if (netif_carrier_ok(netdev)) {
1321 jme_disable_rx_engine(jme);
1322 jme_disable_tx_engine(jme);
1323 jme_reset_mac_processor(jme);
1324 jme_free_rx_resources(jme);
1325 jme_free_tx_resources(jme);
1326
1327 if (test_bit(JME_FLAG_POLL, &jme->flags))
1328 jme_polling_mode(jme);
1329
1330 netif_carrier_off(netdev);
1331 }
1332
1333 jme_check_link(netdev, 0);
1334 if (netif_carrier_ok(netdev)) {
1335 rc = jme_setup_rx_resources(jme);
1336 if (rc) {
1337 pr_err("Allocating resources for RX error, Device STOPPED!\n");
1338 goto out_enable_tasklet;
1339 }
1340
1341 rc = jme_setup_tx_resources(jme);
1342 if (rc) {
1343 pr_err("Allocating resources for TX error, Device STOPPED!\n");
1344 goto err_out_free_rx_resources;
1345 }
1346
1347 jme_enable_rx_engine(jme);
1348 jme_enable_tx_engine(jme);
1349
1350 netif_start_queue(netdev);
1351
1352 if (test_bit(JME_FLAG_POLL, &jme->flags))
1353 jme_interrupt_mode(jme);
1354
1355 jme_start_pcc_timer(jme);
1356 } else if (jme_pseudo_hotplug_enabled(jme)) {
1357 jme_start_shutdown_timer(jme);
1358 }
1359
1360 goto out_enable_tasklet;
1361
1362 err_out_free_rx_resources:
1363 jme_free_rx_resources(jme);
1364 out_enable_tasklet:
1365 tasklet_enable(&jme->txclean_task);
1366 tasklet_hi_enable(&jme->rxclean_task);
1367 tasklet_hi_enable(&jme->rxempty_task);
1368 out:
1369 atomic_inc(&jme->link_changing);
1370 }
1371
1372 static void
1373 jme_rx_clean_tasklet(unsigned long arg)
1374 {
1375 struct jme_adapter *jme = (struct jme_adapter *)arg;
1376 struct dynpcc_info *dpi = &(jme->dpi);
1377
1378 jme_process_receive(jme, jme->rx_ring_size);
1379 ++(dpi->intr_cnt);
1380
1381 }
1382
1383 static int
1384 jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
1385 {
1386 struct jme_adapter *jme = jme_napi_priv(holder);
1387 int rest;
1388
1389 rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
1390
1391 while (atomic_read(&jme->rx_empty) > 0) {
1392 atomic_dec(&jme->rx_empty);
1393 ++(NET_STAT(jme).rx_dropped);
1394 jme_restart_rx_engine(jme);
1395 }
1396 atomic_inc(&jme->rx_empty);
1397
1398 if (rest) {
1399 JME_RX_COMPLETE(netdev, holder);
1400 jme_interrupt_mode(jme);
1401 }
1402
1403 JME_NAPI_WEIGHT_SET(budget, rest);
1404 return JME_NAPI_WEIGHT_VAL(budget) - rest;
1405 }
1406
1407 static void
1408 jme_rx_empty_tasklet(unsigned long arg)
1409 {
1410 struct jme_adapter *jme = (struct jme_adapter *)arg;
1411
1412 if (unlikely(atomic_read(&jme->link_changing) != 1))
1413 return;
1414
1415 if (unlikely(!netif_carrier_ok(jme->dev)))
1416 return;
1417
1418 netif_info(jme, rx_status, jme->dev, "RX Queue Full!\n");
1419
1420 jme_rx_clean_tasklet(arg);
1421
1422 while (atomic_read(&jme->rx_empty) > 0) {
1423 atomic_dec(&jme->rx_empty);
1424 ++(NET_STAT(jme).rx_dropped);
1425 jme_restart_rx_engine(jme);
1426 }
1427 atomic_inc(&jme->rx_empty);
1428 }
1429
1430 static void
1431 jme_wake_queue_if_stopped(struct jme_adapter *jme)
1432 {
1433 struct jme_ring *txring = &(jme->txring[0]);
1434
1435 smp_wmb();
1436 if (unlikely(netif_queue_stopped(jme->dev) &&
1437 atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
1438 netif_info(jme, tx_done, jme->dev, "TX Queue Waked\n");
1439 netif_wake_queue(jme->dev);
1440 }
1441
1442 }
1443
1444 static void
1445 jme_tx_clean_tasklet(unsigned long arg)
1446 {
1447 struct jme_adapter *jme = (struct jme_adapter *)arg;
1448 struct jme_ring *txring = &(jme->txring[0]);
1449 struct txdesc *txdesc = txring->desc;
1450 struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
1451 int i, j, cnt = 0, max, err, mask;
1452
1453 tx_dbg(jme, "Into txclean\n");
1454
1455 if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
1456 goto out;
1457
1458 if (unlikely(atomic_read(&jme->link_changing) != 1))
1459 goto out;
1460
1461 if (unlikely(!netif_carrier_ok(jme->dev)))
1462 goto out;
1463
1464 max = jme->tx_ring_size - atomic_read(&txring->nr_free);
1465 mask = jme->tx_ring_mask;
1466
1467 for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
1468
1469 ctxbi = txbi + i;
1470
1471 if (likely(ctxbi->skb &&
1472 !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
1473
1474 tx_dbg(jme, "txclean: %d+%d@%lu\n",
1475 i, ctxbi->nr_desc, jiffies);
1476
1477 err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
1478
1479 for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
1480 ttxbi = txbi + ((i + j) & (mask));
1481 txdesc[(i + j) & (mask)].dw[0] = 0;
1482
1483 pci_unmap_page(jme->pdev,
1484 ttxbi->mapping,
1485 ttxbi->len,
1486 PCI_DMA_TODEVICE);
1487
1488 ttxbi->mapping = 0;
1489 ttxbi->len = 0;
1490 }
1491
1492 dev_kfree_skb(ctxbi->skb);
1493
1494 cnt += ctxbi->nr_desc;
1495
1496 if (unlikely(err)) {
1497 ++(NET_STAT(jme).tx_carrier_errors);
1498 } else {
1499 ++(NET_STAT(jme).tx_packets);
1500 NET_STAT(jme).tx_bytes += ctxbi->len;
1501 }
1502
1503 ctxbi->skb = NULL;
1504 ctxbi->len = 0;
1505 ctxbi->start_xmit = 0;
1506
1507 } else {
1508 break;
1509 }
1510
1511 i = (i + ctxbi->nr_desc) & mask;
1512
1513 ctxbi->nr_desc = 0;
1514 }
1515
1516 tx_dbg(jme, "txclean: done %d@%lu\n", i, jiffies);
1517 atomic_set(&txring->next_to_clean, i);
1518 atomic_add(cnt, &txring->nr_free);
1519
1520 jme_wake_queue_if_stopped(jme);
1521
1522 out:
1523 atomic_inc(&jme->tx_cleaning);
1524 }
1525
1526 static void
1527 jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
1528 {
1529 /*
1530 * Disable interrupt
1531 */
1532 jwrite32f(jme, JME_IENC, INTR_ENABLE);
1533
1534 if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
1535 /*
1536 * Link change event is critical
1537 * all other events are ignored
1538 */
1539 jwrite32(jme, JME_IEVE, intrstat);
1540 tasklet_schedule(&jme->linkch_task);
1541 goto out_reenable;
1542 }
1543
1544 if (intrstat & INTR_TMINTR) {
1545 jwrite32(jme, JME_IEVE, INTR_TMINTR);
1546 tasklet_schedule(&jme->pcc_task);
1547 }
1548
1549 if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
1550 jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
1551 tasklet_schedule(&jme->txclean_task);
1552 }
1553
1554 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1555 jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
1556 INTR_PCCRX0 |
1557 INTR_RX0EMP)) |
1558 INTR_RX0);
1559 }
1560
1561 if (test_bit(JME_FLAG_POLL, &jme->flags)) {
1562 if (intrstat & INTR_RX0EMP)
1563 atomic_inc(&jme->rx_empty);
1564
1565 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1566 if (likely(JME_RX_SCHEDULE_PREP(jme))) {
1567 jme_polling_mode(jme);
1568 JME_RX_SCHEDULE(jme);
1569 }
1570 }
1571 } else {
1572 if (intrstat & INTR_RX0EMP) {
1573 atomic_inc(&jme->rx_empty);
1574 tasklet_hi_schedule(&jme->rxempty_task);
1575 } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
1576 tasklet_hi_schedule(&jme->rxclean_task);
1577 }
1578 }
1579
1580 out_reenable:
1581 /*
1582 * Re-enable interrupt
1583 */
1584 jwrite32f(jme, JME_IENS, INTR_ENABLE);
1585 }
1586
1587 static irqreturn_t
1588 jme_intr(int irq, void *dev_id)
1589 {
1590 struct net_device *netdev = dev_id;
1591 struct jme_adapter *jme = netdev_priv(netdev);
1592 u32 intrstat;
1593
1594 intrstat = jread32(jme, JME_IEVE);
1595
1596 /*
1597 * Check if it's really an interrupt for us
1598 */
1599 if (unlikely((intrstat & INTR_ENABLE) == 0))
1600 return IRQ_NONE;
1601
1602 /*
1603 * Check if the device still exist
1604 */
1605 if (unlikely(intrstat == ~((typeof(intrstat))0)))
1606 return IRQ_NONE;
1607
1608 jme_intr_msi(jme, intrstat);
1609
1610 return IRQ_HANDLED;
1611 }
1612
1613 static irqreturn_t
1614 jme_msi(int irq, void *dev_id)
1615 {
1616 struct net_device *netdev = dev_id;
1617 struct jme_adapter *jme = netdev_priv(netdev);
1618 u32 intrstat;
1619
1620 intrstat = jread32(jme, JME_IEVE);
1621
1622 jme_intr_msi(jme, intrstat);
1623
1624 return IRQ_HANDLED;
1625 }
1626
1627 static void
1628 jme_reset_link(struct jme_adapter *jme)
1629 {
1630 jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
1631 }
1632
1633 static void
1634 jme_restart_an(struct jme_adapter *jme)
1635 {
1636 u32 bmcr;
1637
1638 spin_lock_bh(&jme->phy_lock);
1639 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1640 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1641 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1642 spin_unlock_bh(&jme->phy_lock);
1643 }
1644
1645 static int
1646 jme_request_irq(struct jme_adapter *jme)
1647 {
1648 int rc;
1649 struct net_device *netdev = jme->dev;
1650 irq_handler_t handler = jme_intr;
1651 int irq_flags = IRQF_SHARED;
1652
1653 if (!pci_enable_msi(jme->pdev)) {
1654 set_bit(JME_FLAG_MSI, &jme->flags);
1655 handler = jme_msi;
1656 irq_flags = 0;
1657 }
1658
1659 rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
1660 netdev);
1661 if (rc) {
1662 netdev_err(netdev,
1663 "Unable to request %s interrupt (return: %d)\n",
1664 test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx",
1665 rc);
1666
1667 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1668 pci_disable_msi(jme->pdev);
1669 clear_bit(JME_FLAG_MSI, &jme->flags);
1670 }
1671 } else {
1672 netdev->irq = jme->pdev->irq;
1673 }
1674
1675 return rc;
1676 }
1677
1678 static void
1679 jme_free_irq(struct jme_adapter *jme)
1680 {
1681 free_irq(jme->pdev->irq, jme->dev);
1682 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1683 pci_disable_msi(jme->pdev);
1684 clear_bit(JME_FLAG_MSI, &jme->flags);
1685 jme->dev->irq = jme->pdev->irq;
1686 }
1687 }
1688
1689 static inline void
1690 jme_new_phy_on(struct jme_adapter *jme)
1691 {
1692 u32 reg;
1693
1694 reg = jread32(jme, JME_PHY_PWR);
1695 reg &= ~(PHY_PWR_DWN1SEL | PHY_PWR_DWN1SW |
1696 PHY_PWR_DWN2 | PHY_PWR_CLKSEL);
1697 jwrite32(jme, JME_PHY_PWR, reg);
1698
1699 pci_read_config_dword(jme->pdev, PCI_PRIV_PE1, &reg);
1700 reg &= ~PE1_GPREG0_PBG;
1701 reg |= PE1_GPREG0_ENBG;
1702 pci_write_config_dword(jme->pdev, PCI_PRIV_PE1, reg);
1703 }
1704
1705 static inline void
1706 jme_new_phy_off(struct jme_adapter *jme)
1707 {
1708 u32 reg;
1709
1710 reg = jread32(jme, JME_PHY_PWR);
1711 reg |= PHY_PWR_DWN1SEL | PHY_PWR_DWN1SW |
1712 PHY_PWR_DWN2 | PHY_PWR_CLKSEL;
1713 jwrite32(jme, JME_PHY_PWR, reg);
1714
1715 pci_read_config_dword(jme->pdev, PCI_PRIV_PE1, &reg);
1716 reg &= ~PE1_GPREG0_PBG;
1717 reg |= PE1_GPREG0_PDD3COLD;
1718 pci_write_config_dword(jme->pdev, PCI_PRIV_PE1, reg);
1719 }
1720
1721 static inline void
1722 jme_phy_on(struct jme_adapter *jme)
1723 {
1724 u32 bmcr;
1725
1726 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1727 bmcr &= ~BMCR_PDOWN;
1728 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1729
1730 if (new_phy_power_ctrl(jme->chip_main_rev))
1731 jme_new_phy_on(jme);
1732 }
1733
1734 static inline void
1735 jme_phy_off(struct jme_adapter *jme)
1736 {
1737 u32 bmcr;
1738
1739 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1740 bmcr |= BMCR_PDOWN;
1741 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1742
1743 if (new_phy_power_ctrl(jme->chip_main_rev))
1744 jme_new_phy_off(jme);
1745 }
1746
1747 static int
1748 jme_open(struct net_device *netdev)
1749 {
1750 struct jme_adapter *jme = netdev_priv(netdev);
1751 int rc;
1752
1753 jme_clear_pm(jme);
1754 JME_NAPI_ENABLE(jme);
1755
1756 tasklet_enable(&jme->linkch_task);
1757 tasklet_enable(&jme->txclean_task);
1758 tasklet_hi_enable(&jme->rxclean_task);
1759 tasklet_hi_enable(&jme->rxempty_task);
1760
1761 rc = jme_request_irq(jme);
1762 if (rc)
1763 goto err_out;
1764
1765 jme_start_irq(jme);
1766
1767 jme_phy_on(jme);
1768 if (test_bit(JME_FLAG_SSET, &jme->flags))
1769 jme_set_settings(netdev, &jme->old_ecmd);
1770 else
1771 jme_reset_phy_processor(jme);
1772
1773 jme_reset_link(jme);
1774
1775 return 0;
1776
1777 err_out:
1778 netif_stop_queue(netdev);
1779 netif_carrier_off(netdev);
1780 return rc;
1781 }
1782
1783 static void
1784 jme_set_100m_half(struct jme_adapter *jme)
1785 {
1786 u32 bmcr, tmp;
1787
1788 jme_phy_on(jme);
1789 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1790 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
1791 BMCR_SPEED1000 | BMCR_FULLDPLX);
1792 tmp |= BMCR_SPEED100;
1793
1794 if (bmcr != tmp)
1795 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
1796
1797 if (jme->fpgaver)
1798 jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL);
1799 else
1800 jwrite32(jme, JME_GHC, GHC_SPEED_100M);
1801 }
1802
1803 #define JME_WAIT_LINK_TIME 2000 /* 2000ms */
1804 static void
1805 jme_wait_link(struct jme_adapter *jme)
1806 {
1807 u32 phylink, to = JME_WAIT_LINK_TIME;
1808
1809 mdelay(1000);
1810 phylink = jme_linkstat_from_phy(jme);
1811 while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
1812 mdelay(10);
1813 phylink = jme_linkstat_from_phy(jme);
1814 }
1815 }
1816
1817 static void
1818 jme_powersave_phy(struct jme_adapter *jme)
1819 {
1820 if (jme->reg_pmcs) {
1821 jme_set_100m_half(jme);
1822 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
1823 jme_wait_link(jme);
1824 jme_clear_pm(jme);
1825 } else {
1826 jme_phy_off(jme);
1827 }
1828 }
1829
1830 static int
1831 jme_close(struct net_device *netdev)
1832 {
1833 struct jme_adapter *jme = netdev_priv(netdev);
1834
1835 netif_stop_queue(netdev);
1836 netif_carrier_off(netdev);
1837
1838 jme_stop_irq(jme);
1839 jme_free_irq(jme);
1840
1841 JME_NAPI_DISABLE(jme);
1842
1843 tasklet_disable(&jme->linkch_task);
1844 tasklet_disable(&jme->txclean_task);
1845 tasklet_disable(&jme->rxclean_task);
1846 tasklet_disable(&jme->rxempty_task);
1847
1848 jme_disable_rx_engine(jme);
1849 jme_disable_tx_engine(jme);
1850 jme_reset_mac_processor(jme);
1851 jme_free_rx_resources(jme);
1852 jme_free_tx_resources(jme);
1853 jme->phylink = 0;
1854 jme_phy_off(jme);
1855
1856 return 0;
1857 }
1858
1859 static int
1860 jme_alloc_txdesc(struct jme_adapter *jme,
1861 struct sk_buff *skb)
1862 {
1863 struct jme_ring *txring = &(jme->txring[0]);
1864 int idx, nr_alloc, mask = jme->tx_ring_mask;
1865
1866 idx = txring->next_to_use;
1867 nr_alloc = skb_shinfo(skb)->nr_frags + 2;
1868
1869 if (unlikely(atomic_read(&txring->nr_free) < nr_alloc))
1870 return -1;
1871
1872 atomic_sub(nr_alloc, &txring->nr_free);
1873
1874 txring->next_to_use = (txring->next_to_use + nr_alloc) & mask;
1875
1876 return idx;
1877 }
1878
1879 static void
1880 jme_fill_tx_map(struct pci_dev *pdev,
1881 struct txdesc *txdesc,
1882 struct jme_buffer_info *txbi,
1883 struct page *page,
1884 u32 page_offset,
1885 u32 len,
1886 u8 hidma)
1887 {
1888 dma_addr_t dmaaddr;
1889
1890 dmaaddr = pci_map_page(pdev,
1891 page,
1892 page_offset,
1893 len,
1894 PCI_DMA_TODEVICE);
1895
1896 pci_dma_sync_single_for_device(pdev,
1897 dmaaddr,
1898 len,
1899 PCI_DMA_TODEVICE);
1900
1901 txdesc->dw[0] = 0;
1902 txdesc->dw[1] = 0;
1903 txdesc->desc2.flags = TXFLAG_OWN;
1904 txdesc->desc2.flags |= (hidma) ? TXFLAG_64BIT : 0;
1905 txdesc->desc2.datalen = cpu_to_le16(len);
1906 txdesc->desc2.bufaddrh = cpu_to_le32((__u64)dmaaddr >> 32);
1907 txdesc->desc2.bufaddrl = cpu_to_le32(
1908 (__u64)dmaaddr & 0xFFFFFFFFUL);
1909
1910 txbi->mapping = dmaaddr;
1911 txbi->len = len;
1912 }
1913
1914 static void
1915 jme_map_tx_skb(struct jme_adapter *jme, struct sk_buff *skb, int idx)
1916 {
1917 struct jme_ring *txring = &(jme->txring[0]);
1918 struct txdesc *txdesc = txring->desc, *ctxdesc;
1919 struct jme_buffer_info *txbi = txring->bufinf, *ctxbi;
1920 u8 hidma = jme->dev->features & NETIF_F_HIGHDMA;
1921 int i, nr_frags = skb_shinfo(skb)->nr_frags;
1922 int mask = jme->tx_ring_mask;
1923 struct skb_frag_struct *frag;
1924 u32 len;
1925
1926 for (i = 0 ; i < nr_frags ; ++i) {
1927 frag = &skb_shinfo(skb)->frags[i];
1928 ctxdesc = txdesc + ((idx + i + 2) & (mask));
1929 ctxbi = txbi + ((idx + i + 2) & (mask));
1930
1931 jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, frag->page,
1932 frag->page_offset, frag->size, hidma);
1933 }
1934
1935 len = skb_is_nonlinear(skb) ? skb_headlen(skb) : skb->len;
1936 ctxdesc = txdesc + ((idx + 1) & (mask));
1937 ctxbi = txbi + ((idx + 1) & (mask));
1938 jme_fill_tx_map(jme->pdev, ctxdesc, ctxbi, virt_to_page(skb->data),
1939 offset_in_page(skb->data), len, hidma);
1940
1941 }
1942
1943 static int
1944 jme_expand_header(struct jme_adapter *jme, struct sk_buff *skb)
1945 {
1946 if (unlikely(skb_shinfo(skb)->gso_size &&
1947 skb_header_cloned(skb) &&
1948 pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) {
1949 dev_kfree_skb(skb);
1950 return -1;
1951 }
1952
1953 return 0;
1954 }
1955
1956 static int
1957 jme_tx_tso(struct sk_buff *skb, __le16 *mss, u8 *flags)
1958 {
1959 *mss = cpu_to_le16(skb_shinfo(skb)->gso_size << TXDESC_MSS_SHIFT);
1960 if (*mss) {
1961 *flags |= TXFLAG_LSEN;
1962
1963 if (skb->protocol == htons(ETH_P_IP)) {
1964 struct iphdr *iph = ip_hdr(skb);
1965
1966 iph->check = 0;
1967 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1968 iph->daddr, 0,
1969 IPPROTO_TCP,
1970 0);
1971 } else {
1972 struct ipv6hdr *ip6h = ipv6_hdr(skb);
1973
1974 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ip6h->saddr,
1975 &ip6h->daddr, 0,
1976 IPPROTO_TCP,
1977 0);
1978 }
1979
1980 return 0;
1981 }
1982
1983 return 1;
1984 }
1985
1986 static void
1987 jme_tx_csum(struct jme_adapter *jme, struct sk_buff *skb, u8 *flags)
1988 {
1989 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1990 u8 ip_proto;
1991
1992 switch (skb->protocol) {
1993 case htons(ETH_P_IP):
1994 ip_proto = ip_hdr(skb)->protocol;
1995 break;
1996 case htons(ETH_P_IPV6):
1997 ip_proto = ipv6_hdr(skb)->nexthdr;
1998 break;
1999 default:
2000 ip_proto = 0;
2001 break;
2002 }
2003
2004 switch (ip_proto) {
2005 case IPPROTO_TCP:
2006 *flags |= TXFLAG_TCPCS;
2007 break;
2008 case IPPROTO_UDP:
2009 *flags |= TXFLAG_UDPCS;
2010 break;
2011 default:
2012 netif_err(jme, tx_err, jme->dev, "Error upper layer protocol\n");
2013 break;
2014 }
2015 }
2016 }
2017
2018 static inline void
2019 jme_tx_vlan(struct sk_buff *skb, __le16 *vlan, u8 *flags)
2020 {
2021 if (vlan_tx_tag_present(skb)) {
2022 *flags |= TXFLAG_TAGON;
2023 *vlan = cpu_to_le16(vlan_tx_tag_get(skb));
2024 }
2025 }
2026
2027 static int
2028 jme_fill_tx_desc(struct jme_adapter *jme, struct sk_buff *skb, int idx)
2029 {
2030 struct jme_ring *txring = &(jme->txring[0]);
2031 struct txdesc *txdesc;
2032 struct jme_buffer_info *txbi;
2033 u8 flags;
2034
2035 txdesc = (struct txdesc *)txring->desc + idx;
2036 txbi = txring->bufinf + idx;
2037
2038 txdesc->dw[0] = 0;
2039 txdesc->dw[1] = 0;
2040 txdesc->dw[2] = 0;
2041 txdesc->dw[3] = 0;
2042 txdesc->desc1.pktsize = cpu_to_le16(skb->len);
2043 /*
2044 * Set OWN bit at final.
2045 * When kernel transmit faster than NIC.
2046 * And NIC trying to send this descriptor before we tell
2047 * it to start sending this TX queue.
2048 * Other fields are already filled correctly.
2049 */
2050 wmb();
2051 flags = TXFLAG_OWN | TXFLAG_INT;
2052 /*
2053 * Set checksum flags while not tso
2054 */
2055 if (jme_tx_tso(skb, &txdesc->desc1.mss, &flags))
2056 jme_tx_csum(jme, skb, &flags);
2057 jme_tx_vlan(skb, &txdesc->desc1.vlan, &flags);
2058 jme_map_tx_skb(jme, skb, idx);
2059 txdesc->desc1.flags = flags;
2060 /*
2061 * Set tx buffer info after telling NIC to send
2062 * For better tx_clean timing
2063 */
2064 wmb();
2065 txbi->nr_desc = skb_shinfo(skb)->nr_frags + 2;
2066 txbi->skb = skb;
2067 txbi->len = skb->len;
2068 txbi->start_xmit = jiffies;
2069 if (!txbi->start_xmit)
2070 txbi->start_xmit = (0UL-1);
2071
2072 return 0;
2073 }
2074
2075 static void
2076 jme_stop_queue_if_full(struct jme_adapter *jme)
2077 {
2078 struct jme_ring *txring = &(jme->txring[0]);
2079 struct jme_buffer_info *txbi = txring->bufinf;
2080 int idx = atomic_read(&txring->next_to_clean);
2081
2082 txbi += idx;
2083
2084 smp_wmb();
2085 if (unlikely(atomic_read(&txring->nr_free) < (MAX_SKB_FRAGS+2))) {
2086 netif_stop_queue(jme->dev);
2087 netif_info(jme, tx_queued, jme->dev, "TX Queue Paused\n");
2088 smp_wmb();
2089 if (atomic_read(&txring->nr_free)
2090 >= (jme->tx_wake_threshold)) {
2091 netif_wake_queue(jme->dev);
2092 netif_info(jme, tx_queued, jme->dev, "TX Queue Fast Waked\n");
2093 }
2094 }
2095
2096 if (unlikely(txbi->start_xmit &&
2097 (jiffies - txbi->start_xmit) >= TX_TIMEOUT &&
2098 txbi->skb)) {
2099 netif_stop_queue(jme->dev);
2100 netif_info(jme, tx_queued, jme->dev,
2101 "TX Queue Stopped %d@%lu\n", idx, jiffies);
2102 }
2103 }
2104
2105 /*
2106 * This function is already protected by netif_tx_lock()
2107 */
2108
2109 static netdev_tx_t
2110 jme_start_xmit(struct sk_buff *skb, struct net_device *netdev)
2111 {
2112 struct jme_adapter *jme = netdev_priv(netdev);
2113 int idx;
2114
2115 if (unlikely(jme_expand_header(jme, skb))) {
2116 ++(NET_STAT(jme).tx_dropped);
2117 return NETDEV_TX_OK;
2118 }
2119
2120 idx = jme_alloc_txdesc(jme, skb);
2121
2122 if (unlikely(idx < 0)) {
2123 netif_stop_queue(netdev);
2124 netif_err(jme, tx_err, jme->dev,
2125 "BUG! Tx ring full when queue awake!\n");
2126
2127 return NETDEV_TX_BUSY;
2128 }
2129
2130 jme_fill_tx_desc(jme, skb, idx);
2131
2132 jwrite32(jme, JME_TXCS, jme->reg_txcs |
2133 TXCS_SELECT_QUEUE0 |
2134 TXCS_QUEUE0S |
2135 TXCS_ENABLE);
2136
2137 tx_dbg(jme, "xmit: %d+%d@%lu\n",
2138 idx, skb_shinfo(skb)->nr_frags + 2, jiffies);
2139 jme_stop_queue_if_full(jme);
2140
2141 return NETDEV_TX_OK;
2142 }
2143
2144 static void
2145 jme_set_unicastaddr(struct net_device *netdev)
2146 {
2147 struct jme_adapter *jme = netdev_priv(netdev);
2148 u32 val;
2149
2150 val = (netdev->dev_addr[3] & 0xff) << 24 |
2151 (netdev->dev_addr[2] & 0xff) << 16 |
2152 (netdev->dev_addr[1] & 0xff) << 8 |
2153 (netdev->dev_addr[0] & 0xff);
2154 jwrite32(jme, JME_RXUMA_LO, val);
2155 val = (netdev->dev_addr[5] & 0xff) << 8 |
2156 (netdev->dev_addr[4] & 0xff);
2157 jwrite32(jme, JME_RXUMA_HI, val);
2158 }
2159
2160 static int
2161 jme_set_macaddr(struct net_device *netdev, void *p)
2162 {
2163 struct jme_adapter *jme = netdev_priv(netdev);
2164 struct sockaddr *addr = p;
2165
2166 if (netif_running(netdev))
2167 return -EBUSY;
2168
2169 spin_lock_bh(&jme->macaddr_lock);
2170 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2171 jme_set_unicastaddr(netdev);
2172 spin_unlock_bh(&jme->macaddr_lock);
2173
2174 return 0;
2175 }
2176
2177 static void
2178 jme_set_multi(struct net_device *netdev)
2179 {
2180 struct jme_adapter *jme = netdev_priv(netdev);
2181 u32 mc_hash[2] = {};
2182
2183 spin_lock_bh(&jme->rxmcs_lock);
2184
2185 jme->reg_rxmcs |= RXMCS_BRDFRAME | RXMCS_UNIFRAME;
2186
2187 if (netdev->flags & IFF_PROMISC) {
2188 jme->reg_rxmcs |= RXMCS_ALLFRAME;
2189 } else if (netdev->flags & IFF_ALLMULTI) {
2190 jme->reg_rxmcs |= RXMCS_ALLMULFRAME;
2191 } else if (netdev->flags & IFF_MULTICAST) {
2192 struct netdev_hw_addr *ha;
2193 int bit_nr;
2194
2195 jme->reg_rxmcs |= RXMCS_MULFRAME | RXMCS_MULFILTERED;
2196 netdev_for_each_mc_addr(ha, netdev) {
2197 bit_nr = ether_crc(ETH_ALEN, ha->addr) & 0x3F;
2198 mc_hash[bit_nr >> 5] |= 1 << (bit_nr & 0x1F);
2199 }
2200
2201 jwrite32(jme, JME_RXMCHT_LO, mc_hash[0]);
2202 jwrite32(jme, JME_RXMCHT_HI, mc_hash[1]);
2203 }
2204
2205 wmb();
2206 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2207
2208 spin_unlock_bh(&jme->rxmcs_lock);
2209 }
2210
2211 static int
2212 jme_change_mtu(struct net_device *netdev, int new_mtu)
2213 {
2214 struct jme_adapter *jme = netdev_priv(netdev);
2215
2216 if (new_mtu == jme->old_mtu)
2217 return 0;
2218
2219 if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) ||
2220 ((new_mtu) < IPV6_MIN_MTU))
2221 return -EINVAL;
2222
2223 if (new_mtu > 4000) {
2224 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2225 jme->reg_rxcs |= RXCS_FIFOTHNP_64QW;
2226 jme_restart_rx_engine(jme);
2227 } else {
2228 jme->reg_rxcs &= ~RXCS_FIFOTHNP;
2229 jme->reg_rxcs |= RXCS_FIFOTHNP_128QW;
2230 jme_restart_rx_engine(jme);
2231 }
2232
2233 netdev->mtu = new_mtu;
2234 netdev_update_features(netdev);
2235
2236 jme_reset_link(jme);
2237
2238 return 0;
2239 }
2240
2241 static void
2242 jme_tx_timeout(struct net_device *netdev)
2243 {
2244 struct jme_adapter *jme = netdev_priv(netdev);
2245
2246 jme->phylink = 0;
2247 jme_reset_phy_processor(jme);
2248 if (test_bit(JME_FLAG_SSET, &jme->flags))
2249 jme_set_settings(netdev, &jme->old_ecmd);
2250
2251 /*
2252 * Force to Reset the link again
2253 */
2254 jme_reset_link(jme);
2255 }
2256
2257 static inline void jme_pause_rx(struct jme_adapter *jme)
2258 {
2259 atomic_dec(&jme->link_changing);
2260
2261 jme_set_rx_pcc(jme, PCC_OFF);
2262 if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2263 JME_NAPI_DISABLE(jme);
2264 } else {
2265 tasklet_disable(&jme->rxclean_task);
2266 tasklet_disable(&jme->rxempty_task);
2267 }
2268 }
2269
2270 static inline void jme_resume_rx(struct jme_adapter *jme)
2271 {
2272 struct dynpcc_info *dpi = &(jme->dpi);
2273
2274 if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2275 JME_NAPI_ENABLE(jme);
2276 } else {
2277 tasklet_hi_enable(&jme->rxclean_task);
2278 tasklet_hi_enable(&jme->rxempty_task);
2279 }
2280 dpi->cur = PCC_P1;
2281 dpi->attempt = PCC_P1;
2282 dpi->cnt = 0;
2283 jme_set_rx_pcc(jme, PCC_P1);
2284
2285 atomic_inc(&jme->link_changing);
2286 }
2287
2288 static void
2289 jme_get_drvinfo(struct net_device *netdev,
2290 struct ethtool_drvinfo *info)
2291 {
2292 struct jme_adapter *jme = netdev_priv(netdev);
2293
2294 strcpy(info->driver, DRV_NAME);
2295 strcpy(info->version, DRV_VERSION);
2296 strcpy(info->bus_info, pci_name(jme->pdev));
2297 }
2298
2299 static int
2300 jme_get_regs_len(struct net_device *netdev)
2301 {
2302 return JME_REG_LEN;
2303 }
2304
2305 static void
2306 mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len)
2307 {
2308 int i;
2309
2310 for (i = 0 ; i < len ; i += 4)
2311 p[i >> 2] = jread32(jme, reg + i);
2312 }
2313
2314 static void
2315 mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr)
2316 {
2317 int i;
2318 u16 *p16 = (u16 *)p;
2319
2320 for (i = 0 ; i < reg_nr ; ++i)
2321 p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i);
2322 }
2323
2324 static void
2325 jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
2326 {
2327 struct jme_adapter *jme = netdev_priv(netdev);
2328 u32 *p32 = (u32 *)p;
2329
2330 memset(p, 0xFF, JME_REG_LEN);
2331
2332 regs->version = 1;
2333 mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
2334
2335 p32 += 0x100 >> 2;
2336 mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
2337
2338 p32 += 0x100 >> 2;
2339 mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
2340
2341 p32 += 0x100 >> 2;
2342 mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
2343
2344 p32 += 0x100 >> 2;
2345 mdio_memcpy(jme, p32, JME_PHY_REG_NR);
2346 }
2347
2348 static int
2349 jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2350 {
2351 struct jme_adapter *jme = netdev_priv(netdev);
2352
2353 ecmd->tx_coalesce_usecs = PCC_TX_TO;
2354 ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
2355
2356 if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2357 ecmd->use_adaptive_rx_coalesce = false;
2358 ecmd->rx_coalesce_usecs = 0;
2359 ecmd->rx_max_coalesced_frames = 0;
2360 return 0;
2361 }
2362
2363 ecmd->use_adaptive_rx_coalesce = true;
2364
2365 switch (jme->dpi.cur) {
2366 case PCC_P1:
2367 ecmd->rx_coalesce_usecs = PCC_P1_TO;
2368 ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
2369 break;
2370 case PCC_P2:
2371 ecmd->rx_coalesce_usecs = PCC_P2_TO;
2372 ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
2373 break;
2374 case PCC_P3:
2375 ecmd->rx_coalesce_usecs = PCC_P3_TO;
2376 ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
2377 break;
2378 default:
2379 break;
2380 }
2381
2382 return 0;
2383 }
2384
2385 static int
2386 jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2387 {
2388 struct jme_adapter *jme = netdev_priv(netdev);
2389 struct dynpcc_info *dpi = &(jme->dpi);
2390
2391 if (netif_running(netdev))
2392 return -EBUSY;
2393
2394 if (ecmd->use_adaptive_rx_coalesce &&
2395 test_bit(JME_FLAG_POLL, &jme->flags)) {
2396 clear_bit(JME_FLAG_POLL, &jme->flags);
2397 jme->jme_rx = netif_rx;
2398 dpi->cur = PCC_P1;
2399 dpi->attempt = PCC_P1;
2400 dpi->cnt = 0;
2401 jme_set_rx_pcc(jme, PCC_P1);
2402 jme_interrupt_mode(jme);
2403 } else if (!(ecmd->use_adaptive_rx_coalesce) &&
2404 !(test_bit(JME_FLAG_POLL, &jme->flags))) {
2405 set_bit(JME_FLAG_POLL, &jme->flags);
2406 jme->jme_rx = netif_receive_skb;
2407 jme_interrupt_mode(jme);
2408 }
2409
2410 return 0;
2411 }
2412
2413 static void
2414 jme_get_pauseparam(struct net_device *netdev,
2415 struct ethtool_pauseparam *ecmd)
2416 {
2417 struct jme_adapter *jme = netdev_priv(netdev);
2418 u32 val;
2419
2420 ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
2421 ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
2422
2423 spin_lock_bh(&jme->phy_lock);
2424 val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2425 spin_unlock_bh(&jme->phy_lock);
2426
2427 ecmd->autoneg =
2428 (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
2429 }
2430
2431 static int
2432 jme_set_pauseparam(struct net_device *netdev,
2433 struct ethtool_pauseparam *ecmd)
2434 {
2435 struct jme_adapter *jme = netdev_priv(netdev);
2436 u32 val;
2437
2438 if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
2439 (ecmd->tx_pause != 0)) {
2440
2441 if (ecmd->tx_pause)
2442 jme->reg_txpfc |= TXPFC_PF_EN;
2443 else
2444 jme->reg_txpfc &= ~TXPFC_PF_EN;
2445
2446 jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
2447 }
2448
2449 spin_lock_bh(&jme->rxmcs_lock);
2450 if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^
2451 (ecmd->rx_pause != 0)) {
2452
2453 if (ecmd->rx_pause)
2454 jme->reg_rxmcs |= RXMCS_FLOWCTRL;
2455 else
2456 jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
2457
2458 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2459 }
2460 spin_unlock_bh(&jme->rxmcs_lock);
2461
2462 spin_lock_bh(&jme->phy_lock);
2463 val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2464 if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^
2465 (ecmd->autoneg != 0)) {
2466
2467 if (ecmd->autoneg)
2468 val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2469 else
2470 val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2471
2472 jme_mdio_write(jme->dev, jme->mii_if.phy_id,
2473 MII_ADVERTISE, val);
2474 }
2475 spin_unlock_bh(&jme->phy_lock);
2476
2477 return 0;
2478 }
2479
2480 static void
2481 jme_get_wol(struct net_device *netdev,
2482 struct ethtool_wolinfo *wol)
2483 {
2484 struct jme_adapter *jme = netdev_priv(netdev);
2485
2486 wol->supported = WAKE_MAGIC | WAKE_PHY;
2487
2488 wol->wolopts = 0;
2489
2490 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2491 wol->wolopts |= WAKE_PHY;
2492
2493 if (jme->reg_pmcs & PMCS_MFEN)
2494 wol->wolopts |= WAKE_MAGIC;
2495
2496 }
2497
2498 static int
2499 jme_set_wol(struct net_device *netdev,
2500 struct ethtool_wolinfo *wol)
2501 {
2502 struct jme_adapter *jme = netdev_priv(netdev);
2503
2504 if (wol->wolopts & (WAKE_MAGICSECURE |
2505 WAKE_UCAST |
2506 WAKE_MCAST |
2507 WAKE_BCAST |
2508 WAKE_ARP))
2509 return -EOPNOTSUPP;
2510
2511 jme->reg_pmcs = 0;
2512
2513 if (wol->wolopts & WAKE_PHY)
2514 jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
2515
2516 if (wol->wolopts & WAKE_MAGIC)
2517 jme->reg_pmcs |= PMCS_MFEN;
2518
2519 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2520 device_set_wakeup_enable(&jme->pdev->dev, !!(jme->reg_pmcs));
2521
2522 return 0;
2523 }
2524
2525 static int
2526 jme_get_settings(struct net_device *netdev,
2527 struct ethtool_cmd *ecmd)
2528 {
2529 struct jme_adapter *jme = netdev_priv(netdev);
2530 int rc;
2531
2532 spin_lock_bh(&jme->phy_lock);
2533 rc = mii_ethtool_gset(&(jme->mii_if), ecmd);
2534 spin_unlock_bh(&jme->phy_lock);
2535 return rc;
2536 }
2537
2538 static int
2539 jme_set_settings(struct net_device *netdev,
2540 struct ethtool_cmd *ecmd)
2541 {
2542 struct jme_adapter *jme = netdev_priv(netdev);
2543 int rc, fdc = 0;
2544
2545 if (ethtool_cmd_speed(ecmd) == SPEED_1000
2546 && ecmd->autoneg != AUTONEG_ENABLE)
2547 return -EINVAL;
2548
2549 /*
2550 * Check If user changed duplex only while force_media.
2551 * Hardware would not generate link change interrupt.
2552 */
2553 if (jme->mii_if.force_media &&
2554 ecmd->autoneg != AUTONEG_ENABLE &&
2555 (jme->mii_if.full_duplex != ecmd->duplex))
2556 fdc = 1;
2557
2558 spin_lock_bh(&jme->phy_lock);
2559 rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
2560 spin_unlock_bh(&jme->phy_lock);
2561
2562 if (!rc) {
2563 if (fdc)
2564 jme_reset_link(jme);
2565 jme->old_ecmd = *ecmd;
2566 set_bit(JME_FLAG_SSET, &jme->flags);
2567 }
2568
2569 return rc;
2570 }
2571
2572 static int
2573 jme_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
2574 {
2575 int rc;
2576 struct jme_adapter *jme = netdev_priv(netdev);
2577 struct mii_ioctl_data *mii_data = if_mii(rq);
2578 unsigned int duplex_chg;
2579
2580 if (cmd == SIOCSMIIREG) {
2581 u16 val = mii_data->val_in;
2582 if (!(val & (BMCR_RESET|BMCR_ANENABLE)) &&
2583 (val & BMCR_SPEED1000))
2584 return -EINVAL;
2585 }
2586
2587 spin_lock_bh(&jme->phy_lock);
2588 rc = generic_mii_ioctl(&jme->mii_if, mii_data, cmd, &duplex_chg);
2589 spin_unlock_bh(&jme->phy_lock);
2590
2591 if (!rc && (cmd == SIOCSMIIREG)) {
2592 if (duplex_chg)
2593 jme_reset_link(jme);
2594 jme_get_settings(netdev, &jme->old_ecmd);
2595 set_bit(JME_FLAG_SSET, &jme->flags);
2596 }
2597
2598 return rc;
2599 }
2600
2601 static u32
2602 jme_get_link(struct net_device *netdev)
2603 {
2604 struct jme_adapter *jme = netdev_priv(netdev);
2605 return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
2606 }
2607
2608 static u32
2609 jme_get_msglevel(struct net_device *netdev)
2610 {
2611 struct jme_adapter *jme = netdev_priv(netdev);
2612 return jme->msg_enable;
2613 }
2614
2615 static void
2616 jme_set_msglevel(struct net_device *netdev, u32 value)
2617 {
2618 struct jme_adapter *jme = netdev_priv(netdev);
2619 jme->msg_enable = value;
2620 }
2621
2622 static u32
2623 jme_fix_features(struct net_device *netdev, u32 features)
2624 {
2625 if (netdev->mtu > 1900)
2626 features &= ~(NETIF_F_ALL_TSO | NETIF_F_ALL_CSUM);
2627 return features;
2628 }
2629
2630 static int
2631 jme_set_features(struct net_device *netdev, u32 features)
2632 {
2633 struct jme_adapter *jme = netdev_priv(netdev);
2634
2635 spin_lock_bh(&jme->rxmcs_lock);
2636 if (features & NETIF_F_RXCSUM)
2637 jme->reg_rxmcs |= RXMCS_CHECKSUM;
2638 else
2639 jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
2640 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2641 spin_unlock_bh(&jme->rxmcs_lock);
2642
2643 return 0;
2644 }
2645
2646 static int
2647 jme_nway_reset(struct net_device *netdev)
2648 {
2649 struct jme_adapter *jme = netdev_priv(netdev);
2650 jme_restart_an(jme);
2651 return 0;
2652 }
2653
2654 static u8
2655 jme_smb_read(struct jme_adapter *jme, unsigned int addr)
2656 {
2657 u32 val;
2658 int to;
2659
2660 val = jread32(jme, JME_SMBCSR);
2661 to = JME_SMB_BUSY_TIMEOUT;
2662 while ((val & SMBCSR_BUSY) && --to) {
2663 msleep(1);
2664 val = jread32(jme, JME_SMBCSR);
2665 }
2666 if (!to) {
2667 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2668 return 0xFF;
2669 }
2670
2671 jwrite32(jme, JME_SMBINTF,
2672 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2673 SMBINTF_HWRWN_READ |
2674 SMBINTF_HWCMD);
2675
2676 val = jread32(jme, JME_SMBINTF);
2677 to = JME_SMB_BUSY_TIMEOUT;
2678 while ((val & SMBINTF_HWCMD) && --to) {
2679 msleep(1);
2680 val = jread32(jme, JME_SMBINTF);
2681 }
2682 if (!to) {
2683 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2684 return 0xFF;
2685 }
2686
2687 return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT;
2688 }
2689
2690 static void
2691 jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data)
2692 {
2693 u32 val;
2694 int to;
2695
2696 val = jread32(jme, JME_SMBCSR);
2697 to = JME_SMB_BUSY_TIMEOUT;
2698 while ((val & SMBCSR_BUSY) && --to) {
2699 msleep(1);
2700 val = jread32(jme, JME_SMBCSR);
2701 }
2702 if (!to) {
2703 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2704 return;
2705 }
2706
2707 jwrite32(jme, JME_SMBINTF,
2708 ((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) |
2709 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2710 SMBINTF_HWRWN_WRITE |
2711 SMBINTF_HWCMD);
2712
2713 val = jread32(jme, JME_SMBINTF);
2714 to = JME_SMB_BUSY_TIMEOUT;
2715 while ((val & SMBINTF_HWCMD) && --to) {
2716 msleep(1);
2717 val = jread32(jme, JME_SMBINTF);
2718 }
2719 if (!to) {
2720 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2721 return;
2722 }
2723
2724 mdelay(2);
2725 }
2726
2727 static int
2728 jme_get_eeprom_len(struct net_device *netdev)
2729 {
2730 struct jme_adapter *jme = netdev_priv(netdev);
2731 u32 val;
2732 val = jread32(jme, JME_SMBCSR);
2733 return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0;
2734 }
2735
2736 static int
2737 jme_get_eeprom(struct net_device *netdev,
2738 struct ethtool_eeprom *eeprom, u8 *data)
2739 {
2740 struct jme_adapter *jme = netdev_priv(netdev);
2741 int i, offset = eeprom->offset, len = eeprom->len;
2742
2743 /*
2744 * ethtool will check the boundary for us
2745 */
2746 eeprom->magic = JME_EEPROM_MAGIC;
2747 for (i = 0 ; i < len ; ++i)
2748 data[i] = jme_smb_read(jme, i + offset);
2749
2750 return 0;
2751 }
2752
2753 static int
2754 jme_set_eeprom(struct net_device *netdev,
2755 struct ethtool_eeprom *eeprom, u8 *data)
2756 {
2757 struct jme_adapter *jme = netdev_priv(netdev);
2758 int i, offset = eeprom->offset, len = eeprom->len;
2759
2760 if (eeprom->magic != JME_EEPROM_MAGIC)
2761 return -EINVAL;
2762
2763 /*
2764 * ethtool will check the boundary for us
2765 */
2766 for (i = 0 ; i < len ; ++i)
2767 jme_smb_write(jme, i + offset, data[i]);
2768
2769 return 0;
2770 }
2771
2772 static const struct ethtool_ops jme_ethtool_ops = {
2773 .get_drvinfo = jme_get_drvinfo,
2774 .get_regs_len = jme_get_regs_len,
2775 .get_regs = jme_get_regs,
2776 .get_coalesce = jme_get_coalesce,
2777 .set_coalesce = jme_set_coalesce,
2778 .get_pauseparam = jme_get_pauseparam,
2779 .set_pauseparam = jme_set_pauseparam,
2780 .get_wol = jme_get_wol,
2781 .set_wol = jme_set_wol,
2782 .get_settings = jme_get_settings,
2783 .set_settings = jme_set_settings,
2784 .get_link = jme_get_link,
2785 .get_msglevel = jme_get_msglevel,
2786 .set_msglevel = jme_set_msglevel,
2787 .nway_reset = jme_nway_reset,
2788 .get_eeprom_len = jme_get_eeprom_len,
2789 .get_eeprom = jme_get_eeprom,
2790 .set_eeprom = jme_set_eeprom,
2791 };
2792
2793 static int
2794 jme_pci_dma64(struct pci_dev *pdev)
2795 {
2796 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2797 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
2798 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
2799 return 1;
2800
2801 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2802 !pci_set_dma_mask(pdev, DMA_BIT_MASK(40)))
2803 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)))
2804 return 1;
2805
2806 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
2807 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2808 return 0;
2809
2810 return -1;
2811 }
2812
2813 static inline void
2814 jme_phy_init(struct jme_adapter *jme)
2815 {
2816 u16 reg26;
2817
2818 reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26);
2819 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000);
2820 }
2821
2822 static inline void
2823 jme_check_hw_ver(struct jme_adapter *jme)
2824 {
2825 u32 chipmode;
2826
2827 chipmode = jread32(jme, JME_CHIPMODE);
2828
2829 jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT;
2830 jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT;
2831 jme->chip_main_rev = jme->chiprev & 0xF;
2832 jme->chip_sub_rev = (jme->chiprev >> 4) & 0xF;
2833 }
2834
2835 static const struct net_device_ops jme_netdev_ops = {
2836 .ndo_open = jme_open,
2837 .ndo_stop = jme_close,
2838 .ndo_validate_addr = eth_validate_addr,
2839 .ndo_do_ioctl = jme_ioctl,
2840 .ndo_start_xmit = jme_start_xmit,
2841 .ndo_set_mac_address = jme_set_macaddr,
2842 .ndo_set_multicast_list = jme_set_multi,
2843 .ndo_change_mtu = jme_change_mtu,
2844 .ndo_tx_timeout = jme_tx_timeout,
2845 .ndo_fix_features = jme_fix_features,
2846 .ndo_set_features = jme_set_features,
2847 };
2848
2849 static int __devinit
2850 jme_init_one(struct pci_dev *pdev,
2851 const struct pci_device_id *ent)
2852 {
2853 int rc = 0, using_dac, i;
2854 struct net_device *netdev;
2855 struct jme_adapter *jme;
2856 u16 bmcr, bmsr;
2857 u32 apmc;
2858
2859 /*
2860 * set up PCI device basics
2861 */
2862 rc = pci_enable_device(pdev);
2863 if (rc) {
2864 pr_err("Cannot enable PCI device\n");
2865 goto err_out;
2866 }
2867
2868 using_dac = jme_pci_dma64(pdev);
2869 if (using_dac < 0) {
2870 pr_err("Cannot set PCI DMA Mask\n");
2871 rc = -EIO;
2872 goto err_out_disable_pdev;
2873 }
2874
2875 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2876 pr_err("No PCI resource region found\n");
2877 rc = -ENOMEM;
2878 goto err_out_disable_pdev;
2879 }
2880
2881 rc = pci_request_regions(pdev, DRV_NAME);
2882 if (rc) {
2883 pr_err("Cannot obtain PCI resource region\n");
2884 goto err_out_disable_pdev;
2885 }
2886
2887 pci_set_master(pdev);
2888
2889 /*
2890 * alloc and init net device
2891 */
2892 netdev = alloc_etherdev(sizeof(*jme));
2893 if (!netdev) {
2894 pr_err("Cannot allocate netdev structure\n");
2895 rc = -ENOMEM;
2896 goto err_out_release_regions;
2897 }
2898 netdev->netdev_ops = &jme_netdev_ops;
2899 netdev->ethtool_ops = &jme_ethtool_ops;
2900 netdev->watchdog_timeo = TX_TIMEOUT;
2901 netdev->hw_features = NETIF_F_IP_CSUM |
2902 NETIF_F_IPV6_CSUM |
2903 NETIF_F_SG |
2904 NETIF_F_TSO |
2905 NETIF_F_TSO6 |
2906 NETIF_F_RXCSUM;
2907 netdev->features = NETIF_F_IP_CSUM |
2908 NETIF_F_IPV6_CSUM |
2909 NETIF_F_SG |
2910 NETIF_F_TSO |
2911 NETIF_F_TSO6 |
2912 NETIF_F_HW_VLAN_TX |
2913 NETIF_F_HW_VLAN_RX;
2914 if (using_dac)
2915 netdev->features |= NETIF_F_HIGHDMA;
2916
2917 SET_NETDEV_DEV(netdev, &pdev->dev);
2918 pci_set_drvdata(pdev, netdev);
2919
2920 /*
2921 * init adapter info
2922 */
2923 jme = netdev_priv(netdev);
2924 jme->pdev = pdev;
2925 jme->dev = netdev;
2926 jme->jme_rx = netif_rx;
2927 jme->old_mtu = netdev->mtu = 1500;
2928 jme->phylink = 0;
2929 jme->tx_ring_size = 1 << 10;
2930 jme->tx_ring_mask = jme->tx_ring_size - 1;
2931 jme->tx_wake_threshold = 1 << 9;
2932 jme->rx_ring_size = 1 << 9;
2933 jme->rx_ring_mask = jme->rx_ring_size - 1;
2934 jme->msg_enable = JME_DEF_MSG_ENABLE;
2935 jme->regs = ioremap(pci_resource_start(pdev, 0),
2936 pci_resource_len(pdev, 0));
2937 if (!(jme->regs)) {
2938 pr_err("Mapping PCI resource region error\n");
2939 rc = -ENOMEM;
2940 goto err_out_free_netdev;
2941 }
2942
2943 if (no_pseudohp) {
2944 apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN;
2945 jwrite32(jme, JME_APMC, apmc);
2946 } else if (force_pseudohp) {
2947 apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN;
2948 jwrite32(jme, JME_APMC, apmc);
2949 }
2950
2951 NETIF_NAPI_SET(netdev, &jme->napi, jme_poll, jme->rx_ring_size >> 2)
2952
2953 spin_lock_init(&jme->phy_lock);
2954 spin_lock_init(&jme->macaddr_lock);
2955 spin_lock_init(&jme->rxmcs_lock);
2956
2957 atomic_set(&jme->link_changing, 1);
2958 atomic_set(&jme->rx_cleaning, 1);
2959 atomic_set(&jme->tx_cleaning, 1);
2960 atomic_set(&jme->rx_empty, 1);
2961
2962 tasklet_init(&jme->pcc_task,
2963 jme_pcc_tasklet,
2964 (unsigned long) jme);
2965 tasklet_init(&jme->linkch_task,
2966 jme_link_change_tasklet,
2967 (unsigned long) jme);
2968 tasklet_init(&jme->txclean_task,
2969 jme_tx_clean_tasklet,
2970 (unsigned long) jme);
2971 tasklet_init(&jme->rxclean_task,
2972 jme_rx_clean_tasklet,
2973 (unsigned long) jme);
2974 tasklet_init(&jme->rxempty_task,
2975 jme_rx_empty_tasklet,
2976 (unsigned long) jme);
2977 tasklet_disable_nosync(&jme->linkch_task);
2978 tasklet_disable_nosync(&jme->txclean_task);
2979 tasklet_disable_nosync(&jme->rxclean_task);
2980 tasklet_disable_nosync(&jme->rxempty_task);
2981 jme->dpi.cur = PCC_P1;
2982
2983 jme->reg_ghc = 0;
2984 jme->reg_rxcs = RXCS_DEFAULT;
2985 jme->reg_rxmcs = RXMCS_DEFAULT;
2986 jme->reg_txpfc = 0;
2987 jme->reg_pmcs = PMCS_MFEN;
2988 jme->reg_gpreg1 = GPREG1_DEFAULT;
2989
2990 if (jme->reg_rxmcs & RXMCS_CHECKSUM)
2991 netdev->features |= NETIF_F_RXCSUM;
2992
2993 /*
2994 * Get Max Read Req Size from PCI Config Space
2995 */
2996 pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs);
2997 jme->mrrs &= PCI_DCSR_MRRS_MASK;
2998 switch (jme->mrrs) {
2999 case MRRS_128B:
3000 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
3001 break;
3002 case MRRS_256B:
3003 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
3004 break;
3005 default:
3006 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
3007 break;
3008 }
3009
3010 /*
3011 * Must check before reset_mac_processor
3012 */
3013 jme_check_hw_ver(jme);
3014 jme->mii_if.dev = netdev;
3015 if (jme->fpgaver) {
3016 jme->mii_if.phy_id = 0;
3017 for (i = 1 ; i < 32 ; ++i) {
3018 bmcr = jme_mdio_read(netdev, i, MII_BMCR);
3019 bmsr = jme_mdio_read(netdev, i, MII_BMSR);
3020 if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) {
3021 jme->mii_if.phy_id = i;
3022 break;
3023 }
3024 }
3025
3026 if (!jme->mii_if.phy_id) {
3027 rc = -EIO;
3028 pr_err("Can not find phy_id\n");
3029 goto err_out_unmap;
3030 }
3031
3032 jme->reg_ghc |= GHC_LINK_POLL;
3033 } else {
3034 jme->mii_if.phy_id = 1;
3035 }
3036 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
3037 jme->mii_if.supports_gmii = true;
3038 else
3039 jme->mii_if.supports_gmii = false;
3040 jme->mii_if.phy_id_mask = 0x1F;
3041 jme->mii_if.reg_num_mask = 0x1F;
3042 jme->mii_if.mdio_read = jme_mdio_read;
3043 jme->mii_if.mdio_write = jme_mdio_write;
3044
3045 jme_clear_pm(jme);
3046 pci_set_power_state(jme->pdev, PCI_D0);
3047 device_set_wakeup_enable(&pdev->dev, true);
3048
3049 jme_set_phyfifo_5level(jme);
3050 jme->pcirev = pdev->revision;
3051 if (!jme->fpgaver)
3052 jme_phy_init(jme);
3053 jme_phy_off(jme);
3054
3055 /*
3056 * Reset MAC processor and reload EEPROM for MAC Address
3057 */
3058 jme_reset_mac_processor(jme);
3059 rc = jme_reload_eeprom(jme);
3060 if (rc) {
3061 pr_err("Reload eeprom for reading MAC Address error\n");
3062 goto err_out_unmap;
3063 }
3064 jme_load_macaddr(netdev);
3065
3066 /*
3067 * Tell stack that we are not ready to work until open()
3068 */
3069 netif_carrier_off(netdev);
3070
3071 rc = register_netdev(netdev);
3072 if (rc) {
3073 pr_err("Cannot register net device\n");
3074 goto err_out_unmap;
3075 }
3076
3077 netif_info(jme, probe, jme->dev, "%s%s chiprev:%x pcirev:%x macaddr:%pM\n",
3078 (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) ?
3079 "JMC250 Gigabit Ethernet" :
3080 (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC260) ?
3081 "JMC260 Fast Ethernet" : "Unknown",
3082 (jme->fpgaver != 0) ? " (FPGA)" : "",
3083 (jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev,
3084 jme->pcirev, netdev->dev_addr);
3085
3086 return 0;
3087
3088 err_out_unmap:
3089 iounmap(jme->regs);
3090 err_out_free_netdev:
3091 pci_set_drvdata(pdev, NULL);
3092 free_netdev(netdev);
3093 err_out_release_regions:
3094 pci_release_regions(pdev);
3095 err_out_disable_pdev:
3096 pci_disable_device(pdev);
3097 err_out:
3098 return rc;
3099 }
3100
3101 static void __devexit
3102 jme_remove_one(struct pci_dev *pdev)
3103 {
3104 struct net_device *netdev = pci_get_drvdata(pdev);
3105 struct jme_adapter *jme = netdev_priv(netdev);
3106
3107 unregister_netdev(netdev);
3108 iounmap(jme->regs);
3109 pci_set_drvdata(pdev, NULL);
3110 free_netdev(netdev);
3111 pci_release_regions(pdev);
3112 pci_disable_device(pdev);
3113
3114 }
3115
3116 static void
3117 jme_shutdown(struct pci_dev *pdev)
3118 {
3119 struct net_device *netdev = pci_get_drvdata(pdev);
3120 struct jme_adapter *jme = netdev_priv(netdev);
3121
3122 jme_powersave_phy(jme);
3123 pci_pme_active(pdev, true);
3124 }
3125
3126 #ifdef CONFIG_PM_SLEEP
3127 static int
3128 jme_suspend(struct device *dev)
3129 {
3130 struct pci_dev *pdev = to_pci_dev(dev);
3131 struct net_device *netdev = pci_get_drvdata(pdev);
3132 struct jme_adapter *jme = netdev_priv(netdev);
3133
3134 atomic_dec(&jme->link_changing);
3135
3136 netif_device_detach(netdev);
3137 netif_stop_queue(netdev);
3138 jme_stop_irq(jme);
3139
3140 tasklet_disable(&jme->txclean_task);
3141 tasklet_disable(&jme->rxclean_task);
3142 tasklet_disable(&jme->rxempty_task);
3143
3144 if (netif_carrier_ok(netdev)) {
3145 if (test_bit(JME_FLAG_POLL, &jme->flags))
3146 jme_polling_mode(jme);
3147
3148 jme_stop_pcc_timer(jme);
3149 jme_disable_rx_engine(jme);
3150 jme_disable_tx_engine(jme);
3151 jme_reset_mac_processor(jme);
3152 jme_free_rx_resources(jme);
3153 jme_free_tx_resources(jme);
3154 netif_carrier_off(netdev);
3155 jme->phylink = 0;
3156 }
3157
3158 tasklet_enable(&jme->txclean_task);
3159 tasklet_hi_enable(&jme->rxclean_task);
3160 tasklet_hi_enable(&jme->rxempty_task);
3161
3162 jme_powersave_phy(jme);
3163
3164 return 0;
3165 }
3166
3167 static int
3168 jme_resume(struct device *dev)
3169 {
3170 struct pci_dev *pdev = to_pci_dev(dev);
3171 struct net_device *netdev = pci_get_drvdata(pdev);
3172 struct jme_adapter *jme = netdev_priv(netdev);
3173
3174 jme_clear_pm(jme);
3175 jme_phy_on(jme);
3176 if (test_bit(JME_FLAG_SSET, &jme->flags))
3177 jme_set_settings(netdev, &jme->old_ecmd);
3178 else
3179 jme_reset_phy_processor(jme);
3180
3181 jme_start_irq(jme);
3182 netif_device_attach(netdev);
3183
3184 atomic_inc(&jme->link_changing);
3185
3186 jme_reset_link(jme);
3187
3188 return 0;
3189 }
3190
3191 static SIMPLE_DEV_PM_OPS(jme_pm_ops, jme_suspend, jme_resume);
3192 #define JME_PM_OPS (&jme_pm_ops)
3193
3194 #else
3195
3196 #define JME_PM_OPS NULL
3197 #endif
3198
3199 static DEFINE_PCI_DEVICE_TABLE(jme_pci_tbl) = {
3200 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) },
3201 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) },
3202 { }
3203 };
3204
3205 static struct pci_driver jme_driver = {
3206 .name = DRV_NAME,
3207 .id_table = jme_pci_tbl,
3208 .probe = jme_init_one,
3209 .remove = __devexit_p(jme_remove_one),
3210 .shutdown = jme_shutdown,
3211 .driver.pm = JME_PM_OPS,
3212 };
3213
3214 static int __init
3215 jme_init_module(void)
3216 {
3217 pr_info("JMicron JMC2XX ethernet driver version %s\n", DRV_VERSION);
3218 return pci_register_driver(&jme_driver);
3219 }
3220
3221 static void __exit
3222 jme_cleanup_module(void)
3223 {
3224 pci_unregister_driver(&jme_driver);
3225 }
3226
3227 module_init(jme_init_module);
3228 module_exit(jme_cleanup_module);
3229
3230 MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
3231 MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
3232 MODULE_LICENSE("GPL");
3233 MODULE_VERSION(DRV_VERSION);
3234 MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
3235
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