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rcu: Remove waitqueue usage for cpu, node, and boost kthreads
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / jme.c
blobb5b174a8c149be9f07e56d8b9f07524ea3505792
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, 0xFFFF0000 | jme->reg_pmcs);
275 pci_set_power_state(jme->pdev, PCI_D0);
276 device_set_wakeup_enable(&jme->pdev->dev, false);
277 }
278
279 static int
280 jme_reload_eeprom(struct jme_adapter *jme)
281 {
282 u32 val;
283 int i;
284
285 val = jread32(jme, JME_SMBCSR);
286
287 if (val & SMBCSR_EEPROMD) {
288 val |= SMBCSR_CNACK;
289 jwrite32(jme, JME_SMBCSR, val);
290 val |= SMBCSR_RELOAD;
291 jwrite32(jme, JME_SMBCSR, val);
292 mdelay(12);
293
294 for (i = JME_EEPROM_RELOAD_TIMEOUT; i > 0; --i) {
295 mdelay(1);
296 if ((jread32(jme, JME_SMBCSR) & SMBCSR_RELOAD) == 0)
297 break;
298 }
299
300 if (i == 0) {
301 pr_err("eeprom reload timeout\n");
302 return -EIO;
303 }
304 }
305
306 return 0;
307 }
308
309 static void
310 jme_load_macaddr(struct net_device *netdev)
311 {
312 struct jme_adapter *jme = netdev_priv(netdev);
313 unsigned char macaddr[6];
314 u32 val;
315
316 spin_lock_bh(&jme->macaddr_lock);
317 val = jread32(jme, JME_RXUMA_LO);
318 macaddr[0] = (val >> 0) & 0xFF;
319 macaddr[1] = (val >> 8) & 0xFF;
320 macaddr[2] = (val >> 16) & 0xFF;
321 macaddr[3] = (val >> 24) & 0xFF;
322 val = jread32(jme, JME_RXUMA_HI);
323 macaddr[4] = (val >> 0) & 0xFF;
324 macaddr[5] = (val >> 8) & 0xFF;
325 memcpy(netdev->dev_addr, macaddr, 6);
326 spin_unlock_bh(&jme->macaddr_lock);
327 }
328
329 static inline void
330 jme_set_rx_pcc(struct jme_adapter *jme, int p)
331 {
332 switch (p) {
333 case PCC_OFF:
334 jwrite32(jme, JME_PCCRX0,
335 ((PCC_OFF_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
336 ((PCC_OFF_CNT << PCCRX_SHIFT) & PCCRX_MASK));
337 break;
338 case PCC_P1:
339 jwrite32(jme, JME_PCCRX0,
340 ((PCC_P1_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
341 ((PCC_P1_CNT << PCCRX_SHIFT) & PCCRX_MASK));
342 break;
343 case PCC_P2:
344 jwrite32(jme, JME_PCCRX0,
345 ((PCC_P2_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
346 ((PCC_P2_CNT << PCCRX_SHIFT) & PCCRX_MASK));
347 break;
348 case PCC_P3:
349 jwrite32(jme, JME_PCCRX0,
350 ((PCC_P3_TO << PCCRXTO_SHIFT) & PCCRXTO_MASK) |
351 ((PCC_P3_CNT << PCCRX_SHIFT) & PCCRX_MASK));
352 break;
353 default:
354 break;
355 }
356 wmb();
357
358 if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
359 netif_info(jme, rx_status, jme->dev, "Switched to PCC_P%d\n", p);
360 }
361
362 static void
363 jme_start_irq(struct jme_adapter *jme)
364 {
365 register struct dynpcc_info *dpi = &(jme->dpi);
366
367 jme_set_rx_pcc(jme, PCC_P1);
368 dpi->cur = PCC_P1;
369 dpi->attempt = PCC_P1;
370 dpi->cnt = 0;
371
372 jwrite32(jme, JME_PCCTX,
373 ((PCC_TX_TO << PCCTXTO_SHIFT) & PCCTXTO_MASK) |
374 ((PCC_TX_CNT << PCCTX_SHIFT) & PCCTX_MASK) |
375 PCCTXQ0_EN
376 );
377
378 /*
379 * Enable Interrupts
380 */
381 jwrite32(jme, JME_IENS, INTR_ENABLE);
382 }
383
384 static inline void
385 jme_stop_irq(struct jme_adapter *jme)
386 {
387 /*
388 * Disable Interrupts
389 */
390 jwrite32f(jme, JME_IENC, INTR_ENABLE);
391 }
392
393 static u32
394 jme_linkstat_from_phy(struct jme_adapter *jme)
395 {
396 u32 phylink, bmsr;
397
398 phylink = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 17);
399 bmsr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMSR);
400 if (bmsr & BMSR_ANCOMP)
401 phylink |= PHY_LINK_AUTONEG_COMPLETE;
402
403 return phylink;
404 }
405
406 static inline void
407 jme_set_phyfifo_5level(struct jme_adapter *jme)
408 {
409 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0004);
410 }
411
412 static inline void
413 jme_set_phyfifo_8level(struct jme_adapter *jme)
414 {
415 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 27, 0x0000);
416 }
417
418 static int
419 jme_check_link(struct net_device *netdev, int testonly)
420 {
421 struct jme_adapter *jme = netdev_priv(netdev);
422 u32 phylink, cnt = JME_SPDRSV_TIMEOUT, bmcr;
423 char linkmsg[64];
424 int rc = 0;
425
426 linkmsg[0] = '\0';
427
428 if (jme->fpgaver)
429 phylink = jme_linkstat_from_phy(jme);
430 else
431 phylink = jread32(jme, JME_PHY_LINK);
432
433 if (phylink & PHY_LINK_UP) {
434 if (!(phylink & PHY_LINK_AUTONEG_COMPLETE)) {
435 /*
436 * If we did not enable AN
437 * Speed/Duplex Info should be obtained from SMI
438 */
439 phylink = PHY_LINK_UP;
440
441 bmcr = jme_mdio_read(jme->dev,
442 jme->mii_if.phy_id,
443 MII_BMCR);
444
445 phylink |= ((bmcr & BMCR_SPEED1000) &&
446 (bmcr & BMCR_SPEED100) == 0) ?
447 PHY_LINK_SPEED_1000M :
448 (bmcr & BMCR_SPEED100) ?
449 PHY_LINK_SPEED_100M :
450 PHY_LINK_SPEED_10M;
451
452 phylink |= (bmcr & BMCR_FULLDPLX) ?
453 PHY_LINK_DUPLEX : 0;
454
455 strcat(linkmsg, "Forced: ");
456 } else {
457 /*
458 * Keep polling for speed/duplex resolve complete
459 */
460 while (!(phylink & PHY_LINK_SPEEDDPU_RESOLVED) &&
461 --cnt) {
462
463 udelay(1);
464
465 if (jme->fpgaver)
466 phylink = jme_linkstat_from_phy(jme);
467 else
468 phylink = jread32(jme, JME_PHY_LINK);
469 }
470 if (!cnt)
471 pr_err("Waiting speed resolve timeout\n");
472
473 strcat(linkmsg, "ANed: ");
474 }
475
476 if (jme->phylink == phylink) {
477 rc = 1;
478 goto out;
479 }
480 if (testonly)
481 goto out;
482
483 jme->phylink = phylink;
484
485 /*
486 * The speed/duplex setting of jme->reg_ghc already cleared
487 * by jme_reset_mac_processor()
488 */
489 switch (phylink & PHY_LINK_SPEED_MASK) {
490 case PHY_LINK_SPEED_10M:
491 jme->reg_ghc |= GHC_SPEED_10M;
492 strcat(linkmsg, "10 Mbps, ");
493 break;
494 case PHY_LINK_SPEED_100M:
495 jme->reg_ghc |= GHC_SPEED_100M;
496 strcat(linkmsg, "100 Mbps, ");
497 break;
498 case PHY_LINK_SPEED_1000M:
499 jme->reg_ghc |= GHC_SPEED_1000M;
500 strcat(linkmsg, "1000 Mbps, ");
501 break;
502 default:
503 break;
504 }
505
506 if (phylink & PHY_LINK_DUPLEX) {
507 jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
508 jwrite32(jme, JME_TXTRHD, TXTRHD_FULLDUPLEX);
509 jme->reg_ghc |= GHC_DPX;
510 } else {
511 jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
512 TXMCS_BACKOFF |
513 TXMCS_CARRIERSENSE |
514 TXMCS_COLLISION);
515 jwrite32(jme, JME_TXTRHD, TXTRHD_HALFDUPLEX);
516 }
517
518 jwrite32(jme, JME_GHC, jme->reg_ghc);
519
520 if (is_buggy250(jme->pdev->device, jme->chiprev)) {
521 jme->reg_gpreg1 &= ~(GPREG1_HALFMODEPATCH |
522 GPREG1_RSSPATCH);
523 if (!(phylink & PHY_LINK_DUPLEX))
524 jme->reg_gpreg1 |= GPREG1_HALFMODEPATCH;
525 switch (phylink & PHY_LINK_SPEED_MASK) {
526 case PHY_LINK_SPEED_10M:
527 jme_set_phyfifo_8level(jme);
528 jme->reg_gpreg1 |= GPREG1_RSSPATCH;
529 break;
530 case PHY_LINK_SPEED_100M:
531 jme_set_phyfifo_5level(jme);
532 jme->reg_gpreg1 |= GPREG1_RSSPATCH;
533 break;
534 case PHY_LINK_SPEED_1000M:
535 jme_set_phyfifo_8level(jme);
536 break;
537 default:
538 break;
539 }
540 }
541 jwrite32(jme, JME_GPREG1, jme->reg_gpreg1);
542
543 strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
544 "Full-Duplex, " :
545 "Half-Duplex, ");
546 strcat(linkmsg, (phylink & PHY_LINK_MDI_STAT) ?
547 "MDI-X" :
548 "MDI");
549 netif_info(jme, link, jme->dev, "Link is up at %s\n", linkmsg);
550 netif_carrier_on(netdev);
551 } else {
552 if (testonly)
553 goto out;
554
555 netif_info(jme, link, jme->dev, "Link is down\n");
556 jme->phylink = 0;
557 netif_carrier_off(netdev);
558 }
559
560 out:
561 return rc;
562 }
563
564 static int
565 jme_setup_tx_resources(struct jme_adapter *jme)
566 {
567 struct jme_ring *txring = &(jme->txring[0]);
568
569 txring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
570 TX_RING_ALLOC_SIZE(jme->tx_ring_size),
571 &(txring->dmaalloc),
572 GFP_ATOMIC);
573
574 if (!txring->alloc)
575 goto err_set_null;
576
577 /*
578 * 16 Bytes align
579 */
580 txring->desc = (void *)ALIGN((unsigned long)(txring->alloc),
581 RING_DESC_ALIGN);
582 txring->dma = ALIGN(txring->dmaalloc, RING_DESC_ALIGN);
583 txring->next_to_use = 0;
584 atomic_set(&txring->next_to_clean, 0);
585 atomic_set(&txring->nr_free, jme->tx_ring_size);
586
587 txring->bufinf = kmalloc(sizeof(struct jme_buffer_info) *
588 jme->tx_ring_size, GFP_ATOMIC);
589 if (unlikely(!(txring->bufinf)))
590 goto err_free_txring;
591
592 /*
593 * Initialize Transmit Descriptors
594 */
595 memset(txring->alloc, 0, TX_RING_ALLOC_SIZE(jme->tx_ring_size));
596 memset(txring->bufinf, 0,
597 sizeof(struct jme_buffer_info) * jme->tx_ring_size);
598
599 return 0;
600
601 err_free_txring:
602 dma_free_coherent(&(jme->pdev->dev),
603 TX_RING_ALLOC_SIZE(jme->tx_ring_size),
604 txring->alloc,
605 txring->dmaalloc);
606
607 err_set_null:
608 txring->desc = NULL;
609 txring->dmaalloc = 0;
610 txring->dma = 0;
611 txring->bufinf = NULL;
612
613 return -ENOMEM;
614 }
615
616 static void
617 jme_free_tx_resources(struct jme_adapter *jme)
618 {
619 int i;
620 struct jme_ring *txring = &(jme->txring[0]);
621 struct jme_buffer_info *txbi;
622
623 if (txring->alloc) {
624 if (txring->bufinf) {
625 for (i = 0 ; i < jme->tx_ring_size ; ++i) {
626 txbi = txring->bufinf + i;
627 if (txbi->skb) {
628 dev_kfree_skb(txbi->skb);
629 txbi->skb = NULL;
630 }
631 txbi->mapping = 0;
632 txbi->len = 0;
633 txbi->nr_desc = 0;
634 txbi->start_xmit = 0;
635 }
636 kfree(txring->bufinf);
637 }
638
639 dma_free_coherent(&(jme->pdev->dev),
640 TX_RING_ALLOC_SIZE(jme->tx_ring_size),
641 txring->alloc,
642 txring->dmaalloc);
643
644 txring->alloc = NULL;
645 txring->desc = NULL;
646 txring->dmaalloc = 0;
647 txring->dma = 0;
648 txring->bufinf = NULL;
649 }
650 txring->next_to_use = 0;
651 atomic_set(&txring->next_to_clean, 0);
652 atomic_set(&txring->nr_free, 0);
653 }
654
655 static inline void
656 jme_enable_tx_engine(struct jme_adapter *jme)
657 {
658 /*
659 * Select Queue 0
660 */
661 jwrite32(jme, JME_TXCS, TXCS_DEFAULT | TXCS_SELECT_QUEUE0);
662 wmb();
663
664 /*
665 * Setup TX Queue 0 DMA Bass Address
666 */
667 jwrite32(jme, JME_TXDBA_LO, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
668 jwrite32(jme, JME_TXDBA_HI, (__u64)(jme->txring[0].dma) >> 32);
669 jwrite32(jme, JME_TXNDA, (__u64)jme->txring[0].dma & 0xFFFFFFFFUL);
670
671 /*
672 * Setup TX Descptor Count
673 */
674 jwrite32(jme, JME_TXQDC, jme->tx_ring_size);
675
676 /*
677 * Enable TX Engine
678 */
679 wmb();
680 jwrite32f(jme, JME_TXCS, jme->reg_txcs |
681 TXCS_SELECT_QUEUE0 |
682 TXCS_ENABLE);
683
684 /*
685 * Start clock for TX MAC Processor
686 */
687 jme_mac_txclk_on(jme);
688 }
689
690 static inline void
691 jme_restart_tx_engine(struct jme_adapter *jme)
692 {
693 /*
694 * Restart TX Engine
695 */
696 jwrite32(jme, JME_TXCS, jme->reg_txcs |
697 TXCS_SELECT_QUEUE0 |
698 TXCS_ENABLE);
699 }
700
701 static inline void
702 jme_disable_tx_engine(struct jme_adapter *jme)
703 {
704 int i;
705 u32 val;
706
707 /*
708 * Disable TX Engine
709 */
710 jwrite32(jme, JME_TXCS, jme->reg_txcs | TXCS_SELECT_QUEUE0);
711 wmb();
712
713 val = jread32(jme, JME_TXCS);
714 for (i = JME_TX_DISABLE_TIMEOUT ; (val & TXCS_ENABLE) && i > 0 ; --i) {
715 mdelay(1);
716 val = jread32(jme, JME_TXCS);
717 rmb();
718 }
719
720 if (!i)
721 pr_err("Disable TX engine timeout\n");
722
723 /*
724 * Stop clock for TX MAC Processor
725 */
726 jme_mac_txclk_off(jme);
727 }
728
729 static void
730 jme_set_clean_rxdesc(struct jme_adapter *jme, int i)
731 {
732 struct jme_ring *rxring = &(jme->rxring[0]);
733 register struct rxdesc *rxdesc = rxring->desc;
734 struct jme_buffer_info *rxbi = rxring->bufinf;
735 rxdesc += i;
736 rxbi += i;
737
738 rxdesc->dw[0] = 0;
739 rxdesc->dw[1] = 0;
740 rxdesc->desc1.bufaddrh = cpu_to_le32((__u64)rxbi->mapping >> 32);
741 rxdesc->desc1.bufaddrl = cpu_to_le32(
742 (__u64)rxbi->mapping & 0xFFFFFFFFUL);
743 rxdesc->desc1.datalen = cpu_to_le16(rxbi->len);
744 if (jme->dev->features & NETIF_F_HIGHDMA)
745 rxdesc->desc1.flags = RXFLAG_64BIT;
746 wmb();
747 rxdesc->desc1.flags |= RXFLAG_OWN | RXFLAG_INT;
748 }
749
750 static int
751 jme_make_new_rx_buf(struct jme_adapter *jme, int i)
752 {
753 struct jme_ring *rxring = &(jme->rxring[0]);
754 struct jme_buffer_info *rxbi = rxring->bufinf + i;
755 struct sk_buff *skb;
756
757 skb = netdev_alloc_skb(jme->dev,
758 jme->dev->mtu + RX_EXTRA_LEN);
759 if (unlikely(!skb))
760 return -ENOMEM;
761
762 rxbi->skb = skb;
763 rxbi->len = skb_tailroom(skb);
764 rxbi->mapping = pci_map_page(jme->pdev,
765 virt_to_page(skb->data),
766 offset_in_page(skb->data),
767 rxbi->len,
768 PCI_DMA_FROMDEVICE);
769
770 return 0;
771 }
772
773 static void
774 jme_free_rx_buf(struct jme_adapter *jme, int i)
775 {
776 struct jme_ring *rxring = &(jme->rxring[0]);
777 struct jme_buffer_info *rxbi = rxring->bufinf;
778 rxbi += i;
779
780 if (rxbi->skb) {
781 pci_unmap_page(jme->pdev,
782 rxbi->mapping,
783 rxbi->len,
784 PCI_DMA_FROMDEVICE);
785 dev_kfree_skb(rxbi->skb);
786 rxbi->skb = NULL;
787 rxbi->mapping = 0;
788 rxbi->len = 0;
789 }
790 }
791
792 static void
793 jme_free_rx_resources(struct jme_adapter *jme)
794 {
795 int i;
796 struct jme_ring *rxring = &(jme->rxring[0]);
797
798 if (rxring->alloc) {
799 if (rxring->bufinf) {
800 for (i = 0 ; i < jme->rx_ring_size ; ++i)
801 jme_free_rx_buf(jme, i);
802 kfree(rxring->bufinf);
803 }
804
805 dma_free_coherent(&(jme->pdev->dev),
806 RX_RING_ALLOC_SIZE(jme->rx_ring_size),
807 rxring->alloc,
808 rxring->dmaalloc);
809 rxring->alloc = NULL;
810 rxring->desc = NULL;
811 rxring->dmaalloc = 0;
812 rxring->dma = 0;
813 rxring->bufinf = NULL;
814 }
815 rxring->next_to_use = 0;
816 atomic_set(&rxring->next_to_clean, 0);
817 }
818
819 static int
820 jme_setup_rx_resources(struct jme_adapter *jme)
821 {
822 int i;
823 struct jme_ring *rxring = &(jme->rxring[0]);
824
825 rxring->alloc = dma_alloc_coherent(&(jme->pdev->dev),
826 RX_RING_ALLOC_SIZE(jme->rx_ring_size),
827 &(rxring->dmaalloc),
828 GFP_ATOMIC);
829 if (!rxring->alloc)
830 goto err_set_null;
831
832 /*
833 * 16 Bytes align
834 */
835 rxring->desc = (void *)ALIGN((unsigned long)(rxring->alloc),
836 RING_DESC_ALIGN);
837 rxring->dma = ALIGN(rxring->dmaalloc, RING_DESC_ALIGN);
838 rxring->next_to_use = 0;
839 atomic_set(&rxring->next_to_clean, 0);
840
841 rxring->bufinf = kmalloc(sizeof(struct jme_buffer_info) *
842 jme->rx_ring_size, GFP_ATOMIC);
843 if (unlikely(!(rxring->bufinf)))
844 goto err_free_rxring;
845
846 /*
847 * Initiallize Receive Descriptors
848 */
849 memset(rxring->bufinf, 0,
850 sizeof(struct jme_buffer_info) * jme->rx_ring_size);
851 for (i = 0 ; i < jme->rx_ring_size ; ++i) {
852 if (unlikely(jme_make_new_rx_buf(jme, i))) {
853 jme_free_rx_resources(jme);
854 return -ENOMEM;
855 }
856
857 jme_set_clean_rxdesc(jme, i);
858 }
859
860 return 0;
861
862 err_free_rxring:
863 dma_free_coherent(&(jme->pdev->dev),
864 RX_RING_ALLOC_SIZE(jme->rx_ring_size),
865 rxring->alloc,
866 rxring->dmaalloc);
867 err_set_null:
868 rxring->desc = NULL;
869 rxring->dmaalloc = 0;
870 rxring->dma = 0;
871 rxring->bufinf = NULL;
872
873 return -ENOMEM;
874 }
875
876 static inline void
877 jme_enable_rx_engine(struct jme_adapter *jme)
878 {
879 /*
880 * Select Queue 0
881 */
882 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
883 RXCS_QUEUESEL_Q0);
884 wmb();
885
886 /*
887 * Setup RX DMA Bass Address
888 */
889 jwrite32(jme, JME_RXDBA_LO, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
890 jwrite32(jme, JME_RXDBA_HI, (__u64)(jme->rxring[0].dma) >> 32);
891 jwrite32(jme, JME_RXNDA, (__u64)(jme->rxring[0].dma) & 0xFFFFFFFFUL);
892
893 /*
894 * Setup RX Descriptor Count
895 */
896 jwrite32(jme, JME_RXQDC, jme->rx_ring_size);
897
898 /*
899 * Setup Unicast Filter
900 */
901 jme_set_unicastaddr(jme->dev);
902 jme_set_multi(jme->dev);
903
904 /*
905 * Enable RX Engine
906 */
907 wmb();
908 jwrite32f(jme, JME_RXCS, jme->reg_rxcs |
909 RXCS_QUEUESEL_Q0 |
910 RXCS_ENABLE |
911 RXCS_QST);
912
913 /*
914 * Start clock for RX MAC Processor
915 */
916 jme_mac_rxclk_on(jme);
917 }
918
919 static inline void
920 jme_restart_rx_engine(struct jme_adapter *jme)
921 {
922 /*
923 * Start RX Engine
924 */
925 jwrite32(jme, JME_RXCS, jme->reg_rxcs |
926 RXCS_QUEUESEL_Q0 |
927 RXCS_ENABLE |
928 RXCS_QST);
929 }
930
931 static inline void
932 jme_disable_rx_engine(struct jme_adapter *jme)
933 {
934 int i;
935 u32 val;
936
937 /*
938 * Disable RX Engine
939 */
940 jwrite32(jme, JME_RXCS, jme->reg_rxcs);
941 wmb();
942
943 val = jread32(jme, JME_RXCS);
944 for (i = JME_RX_DISABLE_TIMEOUT ; (val & RXCS_ENABLE) && i > 0 ; --i) {
945 mdelay(1);
946 val = jread32(jme, JME_RXCS);
947 rmb();
948 }
949
950 if (!i)
951 pr_err("Disable RX engine timeout\n");
952
953 /*
954 * Stop clock for RX MAC Processor
955 */
956 jme_mac_rxclk_off(jme);
957 }
958
959 static u16
960 jme_udpsum(struct sk_buff *skb)
961 {
962 u16 csum = 0xFFFFu;
963
964 if (skb->len < (ETH_HLEN + sizeof(struct iphdr)))
965 return csum;
966 if (skb->protocol != htons(ETH_P_IP))
967 return csum;
968 skb_set_network_header(skb, ETH_HLEN);
969 if ((ip_hdr(skb)->protocol != IPPROTO_UDP) ||
970 (skb->len < (ETH_HLEN +
971 (ip_hdr(skb)->ihl << 2) +
972 sizeof(struct udphdr)))) {
973 skb_reset_network_header(skb);
974 return csum;
975 }
976 skb_set_transport_header(skb,
977 ETH_HLEN + (ip_hdr(skb)->ihl << 2));
978 csum = udp_hdr(skb)->check;
979 skb_reset_transport_header(skb);
980 skb_reset_network_header(skb);
981
982 return csum;
983 }
984
985 static int
986 jme_rxsum_ok(struct jme_adapter *jme, u16 flags, struct sk_buff *skb)
987 {
988 if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
989 return false;
990
991 if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_TCPON | RXWBFLAG_TCPCS))
992 == RXWBFLAG_TCPON)) {
993 if (flags & RXWBFLAG_IPV4)
994 netif_err(jme, rx_err, jme->dev, "TCP Checksum error\n");
995 return false;
996 }
997
998 if (unlikely((flags & (RXWBFLAG_MF | RXWBFLAG_UDPON | RXWBFLAG_UDPCS))
999 == RXWBFLAG_UDPON) && jme_udpsum(skb)) {
1000 if (flags & RXWBFLAG_IPV4)
1001 netif_err(jme, rx_err, jme->dev, "UDP Checksum error\n");
1002 return false;
1003 }
1004
1005 if (unlikely((flags & (RXWBFLAG_IPV4 | RXWBFLAG_IPCS))
1006 == RXWBFLAG_IPV4)) {
1007 netif_err(jme, rx_err, jme->dev, "IPv4 Checksum error\n");
1008 return false;
1009 }
1010
1011 return true;
1012 }
1013
1014 static void
1015 jme_alloc_and_feed_skb(struct jme_adapter *jme, int idx)
1016 {
1017 struct jme_ring *rxring = &(jme->rxring[0]);
1018 struct rxdesc *rxdesc = rxring->desc;
1019 struct jme_buffer_info *rxbi = rxring->bufinf;
1020 struct sk_buff *skb;
1021 int framesize;
1022
1023 rxdesc += idx;
1024 rxbi += idx;
1025
1026 skb = rxbi->skb;
1027 pci_dma_sync_single_for_cpu(jme->pdev,
1028 rxbi->mapping,
1029 rxbi->len,
1030 PCI_DMA_FROMDEVICE);
1031
1032 if (unlikely(jme_make_new_rx_buf(jme, idx))) {
1033 pci_dma_sync_single_for_device(jme->pdev,
1034 rxbi->mapping,
1035 rxbi->len,
1036 PCI_DMA_FROMDEVICE);
1037
1038 ++(NET_STAT(jme).rx_dropped);
1039 } else {
1040 framesize = le16_to_cpu(rxdesc->descwb.framesize)
1041 - RX_PREPAD_SIZE;
1042
1043 skb_reserve(skb, RX_PREPAD_SIZE);
1044 skb_put(skb, framesize);
1045 skb->protocol = eth_type_trans(skb, jme->dev);
1046
1047 if (jme_rxsum_ok(jme, le16_to_cpu(rxdesc->descwb.flags), skb))
1048 skb->ip_summed = CHECKSUM_UNNECESSARY;
1049 else
1050 skb_checksum_none_assert(skb);
1051
1052 if (rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_TAGON)) {
1053 if (jme->vlgrp) {
1054 jme->jme_vlan_rx(skb, jme->vlgrp,
1055 le16_to_cpu(rxdesc->descwb.vlan));
1056 NET_STAT(jme).rx_bytes += 4;
1057 } else {
1058 dev_kfree_skb(skb);
1059 }
1060 } else {
1061 jme->jme_rx(skb);
1062 }
1063
1064 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_DEST)) ==
1065 cpu_to_le16(RXWBFLAG_DEST_MUL))
1066 ++(NET_STAT(jme).multicast);
1067
1068 NET_STAT(jme).rx_bytes += framesize;
1069 ++(NET_STAT(jme).rx_packets);
1070 }
1071
1072 jme_set_clean_rxdesc(jme, idx);
1073
1074 }
1075
1076 static int
1077 jme_process_receive(struct jme_adapter *jme, int limit)
1078 {
1079 struct jme_ring *rxring = &(jme->rxring[0]);
1080 struct rxdesc *rxdesc = rxring->desc;
1081 int i, j, ccnt, desccnt, mask = jme->rx_ring_mask;
1082
1083 if (unlikely(!atomic_dec_and_test(&jme->rx_cleaning)))
1084 goto out_inc;
1085
1086 if (unlikely(atomic_read(&jme->link_changing) != 1))
1087 goto out_inc;
1088
1089 if (unlikely(!netif_carrier_ok(jme->dev)))
1090 goto out_inc;
1091
1092 i = atomic_read(&rxring->next_to_clean);
1093 while (limit > 0) {
1094 rxdesc = rxring->desc;
1095 rxdesc += i;
1096
1097 if ((rxdesc->descwb.flags & cpu_to_le16(RXWBFLAG_OWN)) ||
1098 !(rxdesc->descwb.desccnt & RXWBDCNT_WBCPL))
1099 goto out;
1100 --limit;
1101
1102 rmb();
1103 desccnt = rxdesc->descwb.desccnt & RXWBDCNT_DCNT;
1104
1105 if (unlikely(desccnt > 1 ||
1106 rxdesc->descwb.errstat & RXWBERR_ALLERR)) {
1107
1108 if (rxdesc->descwb.errstat & RXWBERR_CRCERR)
1109 ++(NET_STAT(jme).rx_crc_errors);
1110 else if (rxdesc->descwb.errstat & RXWBERR_OVERUN)
1111 ++(NET_STAT(jme).rx_fifo_errors);
1112 else
1113 ++(NET_STAT(jme).rx_errors);
1114
1115 if (desccnt > 1)
1116 limit -= desccnt - 1;
1117
1118 for (j = i, ccnt = desccnt ; ccnt-- ; ) {
1119 jme_set_clean_rxdesc(jme, j);
1120 j = (j + 1) & (mask);
1121 }
1122
1123 } else {
1124 jme_alloc_and_feed_skb(jme, i);
1125 }
1126
1127 i = (i + desccnt) & (mask);
1128 }
1129
1130 out:
1131 atomic_set(&rxring->next_to_clean, i);
1132
1133 out_inc:
1134 atomic_inc(&jme->rx_cleaning);
1135
1136 return limit > 0 ? limit : 0;
1137
1138 }
1139
1140 static void
1141 jme_attempt_pcc(struct dynpcc_info *dpi, int atmp)
1142 {
1143 if (likely(atmp == dpi->cur)) {
1144 dpi->cnt = 0;
1145 return;
1146 }
1147
1148 if (dpi->attempt == atmp) {
1149 ++(dpi->cnt);
1150 } else {
1151 dpi->attempt = atmp;
1152 dpi->cnt = 0;
1153 }
1154
1155 }
1156
1157 static void
1158 jme_dynamic_pcc(struct jme_adapter *jme)
1159 {
1160 register struct dynpcc_info *dpi = &(jme->dpi);
1161
1162 if ((NET_STAT(jme).rx_bytes - dpi->last_bytes) > PCC_P3_THRESHOLD)
1163 jme_attempt_pcc(dpi, PCC_P3);
1164 else if ((NET_STAT(jme).rx_packets - dpi->last_pkts) > PCC_P2_THRESHOLD ||
1165 dpi->intr_cnt > PCC_INTR_THRESHOLD)
1166 jme_attempt_pcc(dpi, PCC_P2);
1167 else
1168 jme_attempt_pcc(dpi, PCC_P1);
1169
1170 if (unlikely(dpi->attempt != dpi->cur && dpi->cnt > 5)) {
1171 if (dpi->attempt < dpi->cur)
1172 tasklet_schedule(&jme->rxclean_task);
1173 jme_set_rx_pcc(jme, dpi->attempt);
1174 dpi->cur = dpi->attempt;
1175 dpi->cnt = 0;
1176 }
1177 }
1178
1179 static void
1180 jme_start_pcc_timer(struct jme_adapter *jme)
1181 {
1182 struct dynpcc_info *dpi = &(jme->dpi);
1183 dpi->last_bytes = NET_STAT(jme).rx_bytes;
1184 dpi->last_pkts = NET_STAT(jme).rx_packets;
1185 dpi->intr_cnt = 0;
1186 jwrite32(jme, JME_TMCSR,
1187 TMCSR_EN | ((0xFFFFFF - PCC_INTERVAL_US) & TMCSR_CNT));
1188 }
1189
1190 static inline void
1191 jme_stop_pcc_timer(struct jme_adapter *jme)
1192 {
1193 jwrite32(jme, JME_TMCSR, 0);
1194 }
1195
1196 static void
1197 jme_shutdown_nic(struct jme_adapter *jme)
1198 {
1199 u32 phylink;
1200
1201 phylink = jme_linkstat_from_phy(jme);
1202
1203 if (!(phylink & PHY_LINK_UP)) {
1204 /*
1205 * Disable all interrupt before issue timer
1206 */
1207 jme_stop_irq(jme);
1208 jwrite32(jme, JME_TIMER2, TMCSR_EN | 0xFFFFFE);
1209 }
1210 }
1211
1212 static void
1213 jme_pcc_tasklet(unsigned long arg)
1214 {
1215 struct jme_adapter *jme = (struct jme_adapter *)arg;
1216 struct net_device *netdev = jme->dev;
1217
1218 if (unlikely(test_bit(JME_FLAG_SHUTDOWN, &jme->flags))) {
1219 jme_shutdown_nic(jme);
1220 return;
1221 }
1222
1223 if (unlikely(!netif_carrier_ok(netdev) ||
1224 (atomic_read(&jme->link_changing) != 1)
1225 )) {
1226 jme_stop_pcc_timer(jme);
1227 return;
1228 }
1229
1230 if (!(test_bit(JME_FLAG_POLL, &jme->flags)))
1231 jme_dynamic_pcc(jme);
1232
1233 jme_start_pcc_timer(jme);
1234 }
1235
1236 static inline void
1237 jme_polling_mode(struct jme_adapter *jme)
1238 {
1239 jme_set_rx_pcc(jme, PCC_OFF);
1240 }
1241
1242 static inline void
1243 jme_interrupt_mode(struct jme_adapter *jme)
1244 {
1245 jme_set_rx_pcc(jme, PCC_P1);
1246 }
1247
1248 static inline int
1249 jme_pseudo_hotplug_enabled(struct jme_adapter *jme)
1250 {
1251 u32 apmc;
1252 apmc = jread32(jme, JME_APMC);
1253 return apmc & JME_APMC_PSEUDO_HP_EN;
1254 }
1255
1256 static void
1257 jme_start_shutdown_timer(struct jme_adapter *jme)
1258 {
1259 u32 apmc;
1260
1261 apmc = jread32(jme, JME_APMC) | JME_APMC_PCIE_SD_EN;
1262 apmc &= ~JME_APMC_EPIEN_CTRL;
1263 if (!no_extplug) {
1264 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_EN);
1265 wmb();
1266 }
1267 jwrite32f(jme, JME_APMC, apmc);
1268
1269 jwrite32f(jme, JME_TIMER2, 0);
1270 set_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1271 jwrite32(jme, JME_TMCSR,
1272 TMCSR_EN | ((0xFFFFFF - APMC_PHP_SHUTDOWN_DELAY) & TMCSR_CNT));
1273 }
1274
1275 static void
1276 jme_stop_shutdown_timer(struct jme_adapter *jme)
1277 {
1278 u32 apmc;
1279
1280 jwrite32f(jme, JME_TMCSR, 0);
1281 jwrite32f(jme, JME_TIMER2, 0);
1282 clear_bit(JME_FLAG_SHUTDOWN, &jme->flags);
1283
1284 apmc = jread32(jme, JME_APMC);
1285 apmc &= ~(JME_APMC_PCIE_SD_EN | JME_APMC_EPIEN_CTRL);
1286 jwrite32f(jme, JME_APMC, apmc | JME_APMC_EPIEN_CTRL_DIS);
1287 wmb();
1288 jwrite32f(jme, JME_APMC, apmc);
1289 }
1290
1291 static void
1292 jme_link_change_tasklet(unsigned long arg)
1293 {
1294 struct jme_adapter *jme = (struct jme_adapter *)arg;
1295 struct net_device *netdev = jme->dev;
1296 int rc;
1297
1298 while (!atomic_dec_and_test(&jme->link_changing)) {
1299 atomic_inc(&jme->link_changing);
1300 netif_info(jme, intr, jme->dev, "Get link change lock failed\n");
1301 while (atomic_read(&jme->link_changing) != 1)
1302 netif_info(jme, intr, jme->dev, "Waiting link change lock\n");
1303 }
1304
1305 if (jme_check_link(netdev, 1) && jme->old_mtu == netdev->mtu)
1306 goto out;
1307
1308 jme->old_mtu = netdev->mtu;
1309 netif_stop_queue(netdev);
1310 if (jme_pseudo_hotplug_enabled(jme))
1311 jme_stop_shutdown_timer(jme);
1312
1313 jme_stop_pcc_timer(jme);
1314 tasklet_disable(&jme->txclean_task);
1315 tasklet_disable(&jme->rxclean_task);
1316 tasklet_disable(&jme->rxempty_task);
1317
1318 if (netif_carrier_ok(netdev)) {
1319 jme_disable_rx_engine(jme);
1320 jme_disable_tx_engine(jme);
1321 jme_reset_mac_processor(jme);
1322 jme_free_rx_resources(jme);
1323 jme_free_tx_resources(jme);
1324
1325 if (test_bit(JME_FLAG_POLL, &jme->flags))
1326 jme_polling_mode(jme);
1327
1328 netif_carrier_off(netdev);
1329 }
1330
1331 jme_check_link(netdev, 0);
1332 if (netif_carrier_ok(netdev)) {
1333 rc = jme_setup_rx_resources(jme);
1334 if (rc) {
1335 pr_err("Allocating resources for RX error, Device STOPPED!\n");
1336 goto out_enable_tasklet;
1337 }
1338
1339 rc = jme_setup_tx_resources(jme);
1340 if (rc) {
1341 pr_err("Allocating resources for TX error, Device STOPPED!\n");
1342 goto err_out_free_rx_resources;
1343 }
1344
1345 jme_enable_rx_engine(jme);
1346 jme_enable_tx_engine(jme);
1347
1348 netif_start_queue(netdev);
1349
1350 if (test_bit(JME_FLAG_POLL, &jme->flags))
1351 jme_interrupt_mode(jme);
1352
1353 jme_start_pcc_timer(jme);
1354 } else if (jme_pseudo_hotplug_enabled(jme)) {
1355 jme_start_shutdown_timer(jme);
1356 }
1357
1358 goto out_enable_tasklet;
1359
1360 err_out_free_rx_resources:
1361 jme_free_rx_resources(jme);
1362 out_enable_tasklet:
1363 tasklet_enable(&jme->txclean_task);
1364 tasklet_hi_enable(&jme->rxclean_task);
1365 tasklet_hi_enable(&jme->rxempty_task);
1366 out:
1367 atomic_inc(&jme->link_changing);
1368 }
1369
1370 static void
1371 jme_rx_clean_tasklet(unsigned long arg)
1372 {
1373 struct jme_adapter *jme = (struct jme_adapter *)arg;
1374 struct dynpcc_info *dpi = &(jme->dpi);
1375
1376 jme_process_receive(jme, jme->rx_ring_size);
1377 ++(dpi->intr_cnt);
1378
1379 }
1380
1381 static int
1382 jme_poll(JME_NAPI_HOLDER(holder), JME_NAPI_WEIGHT(budget))
1383 {
1384 struct jme_adapter *jme = jme_napi_priv(holder);
1385 int rest;
1386
1387 rest = jme_process_receive(jme, JME_NAPI_WEIGHT_VAL(budget));
1388
1389 while (atomic_read(&jme->rx_empty) > 0) {
1390 atomic_dec(&jme->rx_empty);
1391 ++(NET_STAT(jme).rx_dropped);
1392 jme_restart_rx_engine(jme);
1393 }
1394 atomic_inc(&jme->rx_empty);
1395
1396 if (rest) {
1397 JME_RX_COMPLETE(netdev, holder);
1398 jme_interrupt_mode(jme);
1399 }
1400
1401 JME_NAPI_WEIGHT_SET(budget, rest);
1402 return JME_NAPI_WEIGHT_VAL(budget) - rest;
1403 }
1404
1405 static void
1406 jme_rx_empty_tasklet(unsigned long arg)
1407 {
1408 struct jme_adapter *jme = (struct jme_adapter *)arg;
1409
1410 if (unlikely(atomic_read(&jme->link_changing) != 1))
1411 return;
1412
1413 if (unlikely(!netif_carrier_ok(jme->dev)))
1414 return;
1415
1416 netif_info(jme, rx_status, jme->dev, "RX Queue Full!\n");
1417
1418 jme_rx_clean_tasklet(arg);
1419
1420 while (atomic_read(&jme->rx_empty) > 0) {
1421 atomic_dec(&jme->rx_empty);
1422 ++(NET_STAT(jme).rx_dropped);
1423 jme_restart_rx_engine(jme);
1424 }
1425 atomic_inc(&jme->rx_empty);
1426 }
1427
1428 static void
1429 jme_wake_queue_if_stopped(struct jme_adapter *jme)
1430 {
1431 struct jme_ring *txring = &(jme->txring[0]);
1432
1433 smp_wmb();
1434 if (unlikely(netif_queue_stopped(jme->dev) &&
1435 atomic_read(&txring->nr_free) >= (jme->tx_wake_threshold))) {
1436 netif_info(jme, tx_done, jme->dev, "TX Queue Waked\n");
1437 netif_wake_queue(jme->dev);
1438 }
1439
1440 }
1441
1442 static void
1443 jme_tx_clean_tasklet(unsigned long arg)
1444 {
1445 struct jme_adapter *jme = (struct jme_adapter *)arg;
1446 struct jme_ring *txring = &(jme->txring[0]);
1447 struct txdesc *txdesc = txring->desc;
1448 struct jme_buffer_info *txbi = txring->bufinf, *ctxbi, *ttxbi;
1449 int i, j, cnt = 0, max, err, mask;
1450
1451 tx_dbg(jme, "Into txclean\n");
1452
1453 if (unlikely(!atomic_dec_and_test(&jme->tx_cleaning)))
1454 goto out;
1455
1456 if (unlikely(atomic_read(&jme->link_changing) != 1))
1457 goto out;
1458
1459 if (unlikely(!netif_carrier_ok(jme->dev)))
1460 goto out;
1461
1462 max = jme->tx_ring_size - atomic_read(&txring->nr_free);
1463 mask = jme->tx_ring_mask;
1464
1465 for (i = atomic_read(&txring->next_to_clean) ; cnt < max ; ) {
1466
1467 ctxbi = txbi + i;
1468
1469 if (likely(ctxbi->skb &&
1470 !(txdesc[i].descwb.flags & TXWBFLAG_OWN))) {
1471
1472 tx_dbg(jme, "txclean: %d+%d@%lu\n",
1473 i, ctxbi->nr_desc, jiffies);
1474
1475 err = txdesc[i].descwb.flags & TXWBFLAG_ALLERR;
1476
1477 for (j = 1 ; j < ctxbi->nr_desc ; ++j) {
1478 ttxbi = txbi + ((i + j) & (mask));
1479 txdesc[(i + j) & (mask)].dw[0] = 0;
1480
1481 pci_unmap_page(jme->pdev,
1482 ttxbi->mapping,
1483 ttxbi->len,
1484 PCI_DMA_TODEVICE);
1485
1486 ttxbi->mapping = 0;
1487 ttxbi->len = 0;
1488 }
1489
1490 dev_kfree_skb(ctxbi->skb);
1491
1492 cnt += ctxbi->nr_desc;
1493
1494 if (unlikely(err)) {
1495 ++(NET_STAT(jme).tx_carrier_errors);
1496 } else {
1497 ++(NET_STAT(jme).tx_packets);
1498 NET_STAT(jme).tx_bytes += ctxbi->len;
1499 }
1500
1501 ctxbi->skb = NULL;
1502 ctxbi->len = 0;
1503 ctxbi->start_xmit = 0;
1504
1505 } else {
1506 break;
1507 }
1508
1509 i = (i + ctxbi->nr_desc) & mask;
1510
1511 ctxbi->nr_desc = 0;
1512 }
1513
1514 tx_dbg(jme, "txclean: done %d@%lu\n", i, jiffies);
1515 atomic_set(&txring->next_to_clean, i);
1516 atomic_add(cnt, &txring->nr_free);
1517
1518 jme_wake_queue_if_stopped(jme);
1519
1520 out:
1521 atomic_inc(&jme->tx_cleaning);
1522 }
1523
1524 static void
1525 jme_intr_msi(struct jme_adapter *jme, u32 intrstat)
1526 {
1527 /*
1528 * Disable interrupt
1529 */
1530 jwrite32f(jme, JME_IENC, INTR_ENABLE);
1531
1532 if (intrstat & (INTR_LINKCH | INTR_SWINTR)) {
1533 /*
1534 * Link change event is critical
1535 * all other events are ignored
1536 */
1537 jwrite32(jme, JME_IEVE, intrstat);
1538 tasklet_schedule(&jme->linkch_task);
1539 goto out_reenable;
1540 }
1541
1542 if (intrstat & INTR_TMINTR) {
1543 jwrite32(jme, JME_IEVE, INTR_TMINTR);
1544 tasklet_schedule(&jme->pcc_task);
1545 }
1546
1547 if (intrstat & (INTR_PCCTXTO | INTR_PCCTX)) {
1548 jwrite32(jme, JME_IEVE, INTR_PCCTXTO | INTR_PCCTX | INTR_TX0);
1549 tasklet_schedule(&jme->txclean_task);
1550 }
1551
1552 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1553 jwrite32(jme, JME_IEVE, (intrstat & (INTR_PCCRX0TO |
1554 INTR_PCCRX0 |
1555 INTR_RX0EMP)) |
1556 INTR_RX0);
1557 }
1558
1559 if (test_bit(JME_FLAG_POLL, &jme->flags)) {
1560 if (intrstat & INTR_RX0EMP)
1561 atomic_inc(&jme->rx_empty);
1562
1563 if ((intrstat & (INTR_PCCRX0TO | INTR_PCCRX0 | INTR_RX0EMP))) {
1564 if (likely(JME_RX_SCHEDULE_PREP(jme))) {
1565 jme_polling_mode(jme);
1566 JME_RX_SCHEDULE(jme);
1567 }
1568 }
1569 } else {
1570 if (intrstat & INTR_RX0EMP) {
1571 atomic_inc(&jme->rx_empty);
1572 tasklet_hi_schedule(&jme->rxempty_task);
1573 } else if (intrstat & (INTR_PCCRX0TO | INTR_PCCRX0)) {
1574 tasklet_hi_schedule(&jme->rxclean_task);
1575 }
1576 }
1577
1578 out_reenable:
1579 /*
1580 * Re-enable interrupt
1581 */
1582 jwrite32f(jme, JME_IENS, INTR_ENABLE);
1583 }
1584
1585 static irqreturn_t
1586 jme_intr(int irq, void *dev_id)
1587 {
1588 struct net_device *netdev = dev_id;
1589 struct jme_adapter *jme = netdev_priv(netdev);
1590 u32 intrstat;
1591
1592 intrstat = jread32(jme, JME_IEVE);
1593
1594 /*
1595 * Check if it's really an interrupt for us
1596 */
1597 if (unlikely((intrstat & INTR_ENABLE) == 0))
1598 return IRQ_NONE;
1599
1600 /*
1601 * Check if the device still exist
1602 */
1603 if (unlikely(intrstat == ~((typeof(intrstat))0)))
1604 return IRQ_NONE;
1605
1606 jme_intr_msi(jme, intrstat);
1607
1608 return IRQ_HANDLED;
1609 }
1610
1611 static irqreturn_t
1612 jme_msi(int irq, void *dev_id)
1613 {
1614 struct net_device *netdev = dev_id;
1615 struct jme_adapter *jme = netdev_priv(netdev);
1616 u32 intrstat;
1617
1618 intrstat = jread32(jme, JME_IEVE);
1619
1620 jme_intr_msi(jme, intrstat);
1621
1622 return IRQ_HANDLED;
1623 }
1624
1625 static void
1626 jme_reset_link(struct jme_adapter *jme)
1627 {
1628 jwrite32(jme, JME_TMCSR, TMCSR_SWIT);
1629 }
1630
1631 static void
1632 jme_restart_an(struct jme_adapter *jme)
1633 {
1634 u32 bmcr;
1635
1636 spin_lock_bh(&jme->phy_lock);
1637 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1638 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
1639 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1640 spin_unlock_bh(&jme->phy_lock);
1641 }
1642
1643 static int
1644 jme_request_irq(struct jme_adapter *jme)
1645 {
1646 int rc;
1647 struct net_device *netdev = jme->dev;
1648 irq_handler_t handler = jme_intr;
1649 int irq_flags = IRQF_SHARED;
1650
1651 if (!pci_enable_msi(jme->pdev)) {
1652 set_bit(JME_FLAG_MSI, &jme->flags);
1653 handler = jme_msi;
1654 irq_flags = 0;
1655 }
1656
1657 rc = request_irq(jme->pdev->irq, handler, irq_flags, netdev->name,
1658 netdev);
1659 if (rc) {
1660 netdev_err(netdev,
1661 "Unable to request %s interrupt (return: %d)\n",
1662 test_bit(JME_FLAG_MSI, &jme->flags) ? "MSI" : "INTx",
1663 rc);
1664
1665 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1666 pci_disable_msi(jme->pdev);
1667 clear_bit(JME_FLAG_MSI, &jme->flags);
1668 }
1669 } else {
1670 netdev->irq = jme->pdev->irq;
1671 }
1672
1673 return rc;
1674 }
1675
1676 static void
1677 jme_free_irq(struct jme_adapter *jme)
1678 {
1679 free_irq(jme->pdev->irq, jme->dev);
1680 if (test_bit(JME_FLAG_MSI, &jme->flags)) {
1681 pci_disable_msi(jme->pdev);
1682 clear_bit(JME_FLAG_MSI, &jme->flags);
1683 jme->dev->irq = jme->pdev->irq;
1684 }
1685 }
1686
1687 static inline void
1688 jme_new_phy_on(struct jme_adapter *jme)
1689 {
1690 u32 reg;
1691
1692 reg = jread32(jme, JME_PHY_PWR);
1693 reg &= ~(PHY_PWR_DWN1SEL | PHY_PWR_DWN1SW |
1694 PHY_PWR_DWN2 | PHY_PWR_CLKSEL);
1695 jwrite32(jme, JME_PHY_PWR, reg);
1696
1697 pci_read_config_dword(jme->pdev, PCI_PRIV_PE1, &reg);
1698 reg &= ~PE1_GPREG0_PBG;
1699 reg |= PE1_GPREG0_ENBG;
1700 pci_write_config_dword(jme->pdev, PCI_PRIV_PE1, reg);
1701 }
1702
1703 static inline void
1704 jme_new_phy_off(struct jme_adapter *jme)
1705 {
1706 u32 reg;
1707
1708 reg = jread32(jme, JME_PHY_PWR);
1709 reg |= PHY_PWR_DWN1SEL | PHY_PWR_DWN1SW |
1710 PHY_PWR_DWN2 | PHY_PWR_CLKSEL;
1711 jwrite32(jme, JME_PHY_PWR, reg);
1712
1713 pci_read_config_dword(jme->pdev, PCI_PRIV_PE1, &reg);
1714 reg &= ~PE1_GPREG0_PBG;
1715 reg |= PE1_GPREG0_PDD3COLD;
1716 pci_write_config_dword(jme->pdev, PCI_PRIV_PE1, reg);
1717 }
1718
1719 static inline void
1720 jme_phy_on(struct jme_adapter *jme)
1721 {
1722 u32 bmcr;
1723
1724 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1725 bmcr &= ~BMCR_PDOWN;
1726 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1727
1728 if (new_phy_power_ctrl(jme->chip_main_rev))
1729 jme_new_phy_on(jme);
1730 }
1731
1732 static inline void
1733 jme_phy_off(struct jme_adapter *jme)
1734 {
1735 u32 bmcr;
1736
1737 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1738 bmcr |= BMCR_PDOWN;
1739 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, bmcr);
1740
1741 if (new_phy_power_ctrl(jme->chip_main_rev))
1742 jme_new_phy_off(jme);
1743 }
1744
1745 static int
1746 jme_open(struct net_device *netdev)
1747 {
1748 struct jme_adapter *jme = netdev_priv(netdev);
1749 int rc;
1750
1751 jme_clear_pm(jme);
1752 JME_NAPI_ENABLE(jme);
1753
1754 tasklet_enable(&jme->linkch_task);
1755 tasklet_enable(&jme->txclean_task);
1756 tasklet_hi_enable(&jme->rxclean_task);
1757 tasklet_hi_enable(&jme->rxempty_task);
1758
1759 rc = jme_request_irq(jme);
1760 if (rc)
1761 goto err_out;
1762
1763 jme_start_irq(jme);
1764
1765 jme_phy_on(jme);
1766 if (test_bit(JME_FLAG_SSET, &jme->flags))
1767 jme_set_settings(netdev, &jme->old_ecmd);
1768 else
1769 jme_reset_phy_processor(jme);
1770
1771 jme_reset_link(jme);
1772
1773 return 0;
1774
1775 err_out:
1776 netif_stop_queue(netdev);
1777 netif_carrier_off(netdev);
1778 return rc;
1779 }
1780
1781 static void
1782 jme_set_100m_half(struct jme_adapter *jme)
1783 {
1784 u32 bmcr, tmp;
1785
1786 jme_phy_on(jme);
1787 bmcr = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_BMCR);
1788 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
1789 BMCR_SPEED1000 | BMCR_FULLDPLX);
1790 tmp |= BMCR_SPEED100;
1791
1792 if (bmcr != tmp)
1793 jme_mdio_write(jme->dev, jme->mii_if.phy_id, MII_BMCR, tmp);
1794
1795 if (jme->fpgaver)
1796 jwrite32(jme, JME_GHC, GHC_SPEED_100M | GHC_LINK_POLL);
1797 else
1798 jwrite32(jme, JME_GHC, GHC_SPEED_100M);
1799 }
1800
1801 #define JME_WAIT_LINK_TIME 2000 /* 2000ms */
1802 static void
1803 jme_wait_link(struct jme_adapter *jme)
1804 {
1805 u32 phylink, to = JME_WAIT_LINK_TIME;
1806
1807 mdelay(1000);
1808 phylink = jme_linkstat_from_phy(jme);
1809 while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
1810 mdelay(10);
1811 phylink = jme_linkstat_from_phy(jme);
1812 }
1813 }
1814
1815 static void
1816 jme_powersave_phy(struct jme_adapter *jme)
1817 {
1818 if (jme->reg_pmcs) {
1819 jme_set_100m_half(jme);
1820
1821 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
1822 jme_wait_link(jme);
1823
1824 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
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_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
2290 {
2291 struct jme_adapter *jme = netdev_priv(netdev);
2292
2293 jme_pause_rx(jme);
2294 jme->vlgrp = grp;
2295 jme_resume_rx(jme);
2296 }
2297
2298 static void
2299 jme_get_drvinfo(struct net_device *netdev,
2300 struct ethtool_drvinfo *info)
2301 {
2302 struct jme_adapter *jme = netdev_priv(netdev);
2303
2304 strcpy(info->driver, DRV_NAME);
2305 strcpy(info->version, DRV_VERSION);
2306 strcpy(info->bus_info, pci_name(jme->pdev));
2307 }
2308
2309 static int
2310 jme_get_regs_len(struct net_device *netdev)
2311 {
2312 return JME_REG_LEN;
2313 }
2314
2315 static void
2316 mmapio_memcpy(struct jme_adapter *jme, u32 *p, u32 reg, int len)
2317 {
2318 int i;
2319
2320 for (i = 0 ; i < len ; i += 4)
2321 p[i >> 2] = jread32(jme, reg + i);
2322 }
2323
2324 static void
2325 mdio_memcpy(struct jme_adapter *jme, u32 *p, int reg_nr)
2326 {
2327 int i;
2328 u16 *p16 = (u16 *)p;
2329
2330 for (i = 0 ; i < reg_nr ; ++i)
2331 p16[i] = jme_mdio_read(jme->dev, jme->mii_if.phy_id, i);
2332 }
2333
2334 static void
2335 jme_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p)
2336 {
2337 struct jme_adapter *jme = netdev_priv(netdev);
2338 u32 *p32 = (u32 *)p;
2339
2340 memset(p, 0xFF, JME_REG_LEN);
2341
2342 regs->version = 1;
2343 mmapio_memcpy(jme, p32, JME_MAC, JME_MAC_LEN);
2344
2345 p32 += 0x100 >> 2;
2346 mmapio_memcpy(jme, p32, JME_PHY, JME_PHY_LEN);
2347
2348 p32 += 0x100 >> 2;
2349 mmapio_memcpy(jme, p32, JME_MISC, JME_MISC_LEN);
2350
2351 p32 += 0x100 >> 2;
2352 mmapio_memcpy(jme, p32, JME_RSS, JME_RSS_LEN);
2353
2354 p32 += 0x100 >> 2;
2355 mdio_memcpy(jme, p32, JME_PHY_REG_NR);
2356 }
2357
2358 static int
2359 jme_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2360 {
2361 struct jme_adapter *jme = netdev_priv(netdev);
2362
2363 ecmd->tx_coalesce_usecs = PCC_TX_TO;
2364 ecmd->tx_max_coalesced_frames = PCC_TX_CNT;
2365
2366 if (test_bit(JME_FLAG_POLL, &jme->flags)) {
2367 ecmd->use_adaptive_rx_coalesce = false;
2368 ecmd->rx_coalesce_usecs = 0;
2369 ecmd->rx_max_coalesced_frames = 0;
2370 return 0;
2371 }
2372
2373 ecmd->use_adaptive_rx_coalesce = true;
2374
2375 switch (jme->dpi.cur) {
2376 case PCC_P1:
2377 ecmd->rx_coalesce_usecs = PCC_P1_TO;
2378 ecmd->rx_max_coalesced_frames = PCC_P1_CNT;
2379 break;
2380 case PCC_P2:
2381 ecmd->rx_coalesce_usecs = PCC_P2_TO;
2382 ecmd->rx_max_coalesced_frames = PCC_P2_CNT;
2383 break;
2384 case PCC_P3:
2385 ecmd->rx_coalesce_usecs = PCC_P3_TO;
2386 ecmd->rx_max_coalesced_frames = PCC_P3_CNT;
2387 break;
2388 default:
2389 break;
2390 }
2391
2392 return 0;
2393 }
2394
2395 static int
2396 jme_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd)
2397 {
2398 struct jme_adapter *jme = netdev_priv(netdev);
2399 struct dynpcc_info *dpi = &(jme->dpi);
2400
2401 if (netif_running(netdev))
2402 return -EBUSY;
2403
2404 if (ecmd->use_adaptive_rx_coalesce &&
2405 test_bit(JME_FLAG_POLL, &jme->flags)) {
2406 clear_bit(JME_FLAG_POLL, &jme->flags);
2407 jme->jme_rx = netif_rx;
2408 jme->jme_vlan_rx = vlan_hwaccel_rx;
2409 dpi->cur = PCC_P1;
2410 dpi->attempt = PCC_P1;
2411 dpi->cnt = 0;
2412 jme_set_rx_pcc(jme, PCC_P1);
2413 jme_interrupt_mode(jme);
2414 } else if (!(ecmd->use_adaptive_rx_coalesce) &&
2415 !(test_bit(JME_FLAG_POLL, &jme->flags))) {
2416 set_bit(JME_FLAG_POLL, &jme->flags);
2417 jme->jme_rx = netif_receive_skb;
2418 jme->jme_vlan_rx = vlan_hwaccel_receive_skb;
2419 jme_interrupt_mode(jme);
2420 }
2421
2422 return 0;
2423 }
2424
2425 static void
2426 jme_get_pauseparam(struct net_device *netdev,
2427 struct ethtool_pauseparam *ecmd)
2428 {
2429 struct jme_adapter *jme = netdev_priv(netdev);
2430 u32 val;
2431
2432 ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
2433 ecmd->rx_pause = (jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0;
2434
2435 spin_lock_bh(&jme->phy_lock);
2436 val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2437 spin_unlock_bh(&jme->phy_lock);
2438
2439 ecmd->autoneg =
2440 (val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0;
2441 }
2442
2443 static int
2444 jme_set_pauseparam(struct net_device *netdev,
2445 struct ethtool_pauseparam *ecmd)
2446 {
2447 struct jme_adapter *jme = netdev_priv(netdev);
2448 u32 val;
2449
2450 if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
2451 (ecmd->tx_pause != 0)) {
2452
2453 if (ecmd->tx_pause)
2454 jme->reg_txpfc |= TXPFC_PF_EN;
2455 else
2456 jme->reg_txpfc &= ~TXPFC_PF_EN;
2457
2458 jwrite32(jme, JME_TXPFC, jme->reg_txpfc);
2459 }
2460
2461 spin_lock_bh(&jme->rxmcs_lock);
2462 if (((jme->reg_rxmcs & RXMCS_FLOWCTRL) != 0) ^
2463 (ecmd->rx_pause != 0)) {
2464
2465 if (ecmd->rx_pause)
2466 jme->reg_rxmcs |= RXMCS_FLOWCTRL;
2467 else
2468 jme->reg_rxmcs &= ~RXMCS_FLOWCTRL;
2469
2470 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2471 }
2472 spin_unlock_bh(&jme->rxmcs_lock);
2473
2474 spin_lock_bh(&jme->phy_lock);
2475 val = jme_mdio_read(jme->dev, jme->mii_if.phy_id, MII_ADVERTISE);
2476 if (((val & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) != 0) ^
2477 (ecmd->autoneg != 0)) {
2478
2479 if (ecmd->autoneg)
2480 val |= (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2481 else
2482 val &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
2483
2484 jme_mdio_write(jme->dev, jme->mii_if.phy_id,
2485 MII_ADVERTISE, val);
2486 }
2487 spin_unlock_bh(&jme->phy_lock);
2488
2489 return 0;
2490 }
2491
2492 static void
2493 jme_get_wol(struct net_device *netdev,
2494 struct ethtool_wolinfo *wol)
2495 {
2496 struct jme_adapter *jme = netdev_priv(netdev);
2497
2498 wol->supported = WAKE_MAGIC | WAKE_PHY;
2499
2500 wol->wolopts = 0;
2501
2502 if (jme->reg_pmcs & (PMCS_LFEN | PMCS_LREN))
2503 wol->wolopts |= WAKE_PHY;
2504
2505 if (jme->reg_pmcs & PMCS_MFEN)
2506 wol->wolopts |= WAKE_MAGIC;
2507
2508 }
2509
2510 static int
2511 jme_set_wol(struct net_device *netdev,
2512 struct ethtool_wolinfo *wol)
2513 {
2514 struct jme_adapter *jme = netdev_priv(netdev);
2515
2516 if (wol->wolopts & (WAKE_MAGICSECURE |
2517 WAKE_UCAST |
2518 WAKE_MCAST |
2519 WAKE_BCAST |
2520 WAKE_ARP))
2521 return -EOPNOTSUPP;
2522
2523 jme->reg_pmcs = 0;
2524
2525 if (wol->wolopts & WAKE_PHY)
2526 jme->reg_pmcs |= PMCS_LFEN | PMCS_LREN;
2527
2528 if (wol->wolopts & WAKE_MAGIC)
2529 jme->reg_pmcs |= PMCS_MFEN;
2530
2531 jwrite32(jme, JME_PMCS, jme->reg_pmcs);
2532
2533 device_set_wakeup_enable(&jme->pdev->dev, jme->reg_pmcs);
2534
2535 return 0;
2536 }
2537
2538 static int
2539 jme_get_settings(struct net_device *netdev,
2540 struct ethtool_cmd *ecmd)
2541 {
2542 struct jme_adapter *jme = netdev_priv(netdev);
2543 int rc;
2544
2545 spin_lock_bh(&jme->phy_lock);
2546 rc = mii_ethtool_gset(&(jme->mii_if), ecmd);
2547 spin_unlock_bh(&jme->phy_lock);
2548 return rc;
2549 }
2550
2551 static int
2552 jme_set_settings(struct net_device *netdev,
2553 struct ethtool_cmd *ecmd)
2554 {
2555 struct jme_adapter *jme = netdev_priv(netdev);
2556 int rc, fdc = 0;
2557
2558 if (ethtool_cmd_speed(ecmd) == SPEED_1000
2559 && ecmd->autoneg != AUTONEG_ENABLE)
2560 return -EINVAL;
2561
2562 /*
2563 * Check If user changed duplex only while force_media.
2564 * Hardware would not generate link change interrupt.
2565 */
2566 if (jme->mii_if.force_media &&
2567 ecmd->autoneg != AUTONEG_ENABLE &&
2568 (jme->mii_if.full_duplex != ecmd->duplex))
2569 fdc = 1;
2570
2571 spin_lock_bh(&jme->phy_lock);
2572 rc = mii_ethtool_sset(&(jme->mii_if), ecmd);
2573 spin_unlock_bh(&jme->phy_lock);
2574
2575 if (!rc) {
2576 if (fdc)
2577 jme_reset_link(jme);
2578 jme->old_ecmd = *ecmd;
2579 set_bit(JME_FLAG_SSET, &jme->flags);
2580 }
2581
2582 return rc;
2583 }
2584
2585 static int
2586 jme_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
2587 {
2588 int rc;
2589 struct jme_adapter *jme = netdev_priv(netdev);
2590 struct mii_ioctl_data *mii_data = if_mii(rq);
2591 unsigned int duplex_chg;
2592
2593 if (cmd == SIOCSMIIREG) {
2594 u16 val = mii_data->val_in;
2595 if (!(val & (BMCR_RESET|BMCR_ANENABLE)) &&
2596 (val & BMCR_SPEED1000))
2597 return -EINVAL;
2598 }
2599
2600 spin_lock_bh(&jme->phy_lock);
2601 rc = generic_mii_ioctl(&jme->mii_if, mii_data, cmd, &duplex_chg);
2602 spin_unlock_bh(&jme->phy_lock);
2603
2604 if (!rc && (cmd == SIOCSMIIREG)) {
2605 if (duplex_chg)
2606 jme_reset_link(jme);
2607 jme_get_settings(netdev, &jme->old_ecmd);
2608 set_bit(JME_FLAG_SSET, &jme->flags);
2609 }
2610
2611 return rc;
2612 }
2613
2614 static u32
2615 jme_get_link(struct net_device *netdev)
2616 {
2617 struct jme_adapter *jme = netdev_priv(netdev);
2618 return jread32(jme, JME_PHY_LINK) & PHY_LINK_UP;
2619 }
2620
2621 static u32
2622 jme_get_msglevel(struct net_device *netdev)
2623 {
2624 struct jme_adapter *jme = netdev_priv(netdev);
2625 return jme->msg_enable;
2626 }
2627
2628 static void
2629 jme_set_msglevel(struct net_device *netdev, u32 value)
2630 {
2631 struct jme_adapter *jme = netdev_priv(netdev);
2632 jme->msg_enable = value;
2633 }
2634
2635 static u32
2636 jme_fix_features(struct net_device *netdev, u32 features)
2637 {
2638 if (netdev->mtu > 1900)
2639 features &= ~(NETIF_F_ALL_TSO | NETIF_F_ALL_CSUM);
2640 return features;
2641 }
2642
2643 static int
2644 jme_set_features(struct net_device *netdev, u32 features)
2645 {
2646 struct jme_adapter *jme = netdev_priv(netdev);
2647
2648 spin_lock_bh(&jme->rxmcs_lock);
2649 if (features & NETIF_F_RXCSUM)
2650 jme->reg_rxmcs |= RXMCS_CHECKSUM;
2651 else
2652 jme->reg_rxmcs &= ~RXMCS_CHECKSUM;
2653 jwrite32(jme, JME_RXMCS, jme->reg_rxmcs);
2654 spin_unlock_bh(&jme->rxmcs_lock);
2655
2656 return 0;
2657 }
2658
2659 static int
2660 jme_nway_reset(struct net_device *netdev)
2661 {
2662 struct jme_adapter *jme = netdev_priv(netdev);
2663 jme_restart_an(jme);
2664 return 0;
2665 }
2666
2667 static u8
2668 jme_smb_read(struct jme_adapter *jme, unsigned int addr)
2669 {
2670 u32 val;
2671 int to;
2672
2673 val = jread32(jme, JME_SMBCSR);
2674 to = JME_SMB_BUSY_TIMEOUT;
2675 while ((val & SMBCSR_BUSY) && --to) {
2676 msleep(1);
2677 val = jread32(jme, JME_SMBCSR);
2678 }
2679 if (!to) {
2680 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2681 return 0xFF;
2682 }
2683
2684 jwrite32(jme, JME_SMBINTF,
2685 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2686 SMBINTF_HWRWN_READ |
2687 SMBINTF_HWCMD);
2688
2689 val = jread32(jme, JME_SMBINTF);
2690 to = JME_SMB_BUSY_TIMEOUT;
2691 while ((val & SMBINTF_HWCMD) && --to) {
2692 msleep(1);
2693 val = jread32(jme, JME_SMBINTF);
2694 }
2695 if (!to) {
2696 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2697 return 0xFF;
2698 }
2699
2700 return (val & SMBINTF_HWDATR) >> SMBINTF_HWDATR_SHIFT;
2701 }
2702
2703 static void
2704 jme_smb_write(struct jme_adapter *jme, unsigned int addr, u8 data)
2705 {
2706 u32 val;
2707 int to;
2708
2709 val = jread32(jme, JME_SMBCSR);
2710 to = JME_SMB_BUSY_TIMEOUT;
2711 while ((val & SMBCSR_BUSY) && --to) {
2712 msleep(1);
2713 val = jread32(jme, JME_SMBCSR);
2714 }
2715 if (!to) {
2716 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2717 return;
2718 }
2719
2720 jwrite32(jme, JME_SMBINTF,
2721 ((data << SMBINTF_HWDATW_SHIFT) & SMBINTF_HWDATW) |
2722 ((addr << SMBINTF_HWADDR_SHIFT) & SMBINTF_HWADDR) |
2723 SMBINTF_HWRWN_WRITE |
2724 SMBINTF_HWCMD);
2725
2726 val = jread32(jme, JME_SMBINTF);
2727 to = JME_SMB_BUSY_TIMEOUT;
2728 while ((val & SMBINTF_HWCMD) && --to) {
2729 msleep(1);
2730 val = jread32(jme, JME_SMBINTF);
2731 }
2732 if (!to) {
2733 netif_err(jme, hw, jme->dev, "SMB Bus Busy\n");
2734 return;
2735 }
2736
2737 mdelay(2);
2738 }
2739
2740 static int
2741 jme_get_eeprom_len(struct net_device *netdev)
2742 {
2743 struct jme_adapter *jme = netdev_priv(netdev);
2744 u32 val;
2745 val = jread32(jme, JME_SMBCSR);
2746 return (val & SMBCSR_EEPROMD) ? JME_SMB_LEN : 0;
2747 }
2748
2749 static int
2750 jme_get_eeprom(struct net_device *netdev,
2751 struct ethtool_eeprom *eeprom, u8 *data)
2752 {
2753 struct jme_adapter *jme = netdev_priv(netdev);
2754 int i, offset = eeprom->offset, len = eeprom->len;
2755
2756 /*
2757 * ethtool will check the boundary for us
2758 */
2759 eeprom->magic = JME_EEPROM_MAGIC;
2760 for (i = 0 ; i < len ; ++i)
2761 data[i] = jme_smb_read(jme, i + offset);
2762
2763 return 0;
2764 }
2765
2766 static int
2767 jme_set_eeprom(struct net_device *netdev,
2768 struct ethtool_eeprom *eeprom, u8 *data)
2769 {
2770 struct jme_adapter *jme = netdev_priv(netdev);
2771 int i, offset = eeprom->offset, len = eeprom->len;
2772
2773 if (eeprom->magic != JME_EEPROM_MAGIC)
2774 return -EINVAL;
2775
2776 /*
2777 * ethtool will check the boundary for us
2778 */
2779 for (i = 0 ; i < len ; ++i)
2780 jme_smb_write(jme, i + offset, data[i]);
2781
2782 return 0;
2783 }
2784
2785 static const struct ethtool_ops jme_ethtool_ops = {
2786 .get_drvinfo = jme_get_drvinfo,
2787 .get_regs_len = jme_get_regs_len,
2788 .get_regs = jme_get_regs,
2789 .get_coalesce = jme_get_coalesce,
2790 .set_coalesce = jme_set_coalesce,
2791 .get_pauseparam = jme_get_pauseparam,
2792 .set_pauseparam = jme_set_pauseparam,
2793 .get_wol = jme_get_wol,
2794 .set_wol = jme_set_wol,
2795 .get_settings = jme_get_settings,
2796 .set_settings = jme_set_settings,
2797 .get_link = jme_get_link,
2798 .get_msglevel = jme_get_msglevel,
2799 .set_msglevel = jme_set_msglevel,
2800 .nway_reset = jme_nway_reset,
2801 .get_eeprom_len = jme_get_eeprom_len,
2802 .get_eeprom = jme_get_eeprom,
2803 .set_eeprom = jme_set_eeprom,
2804 };
2805
2806 static int
2807 jme_pci_dma64(struct pci_dev *pdev)
2808 {
2809 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2810 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
2811 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
2812 return 1;
2813
2814 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250 &&
2815 !pci_set_dma_mask(pdev, DMA_BIT_MASK(40)))
2816 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)))
2817 return 1;
2818
2819 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
2820 if (!pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2821 return 0;
2822
2823 return -1;
2824 }
2825
2826 static inline void
2827 jme_phy_init(struct jme_adapter *jme)
2828 {
2829 u16 reg26;
2830
2831 reg26 = jme_mdio_read(jme->dev, jme->mii_if.phy_id, 26);
2832 jme_mdio_write(jme->dev, jme->mii_if.phy_id, 26, reg26 | 0x1000);
2833 }
2834
2835 static inline void
2836 jme_check_hw_ver(struct jme_adapter *jme)
2837 {
2838 u32 chipmode;
2839
2840 chipmode = jread32(jme, JME_CHIPMODE);
2841
2842 jme->fpgaver = (chipmode & CM_FPGAVER_MASK) >> CM_FPGAVER_SHIFT;
2843 jme->chiprev = (chipmode & CM_CHIPREV_MASK) >> CM_CHIPREV_SHIFT;
2844 jme->chip_main_rev = jme->chiprev & 0xF;
2845 jme->chip_sub_rev = (jme->chiprev >> 4) & 0xF;
2846 }
2847
2848 static const struct net_device_ops jme_netdev_ops = {
2849 .ndo_open = jme_open,
2850 .ndo_stop = jme_close,
2851 .ndo_validate_addr = eth_validate_addr,
2852 .ndo_do_ioctl = jme_ioctl,
2853 .ndo_start_xmit = jme_start_xmit,
2854 .ndo_set_mac_address = jme_set_macaddr,
2855 .ndo_set_multicast_list = jme_set_multi,
2856 .ndo_change_mtu = jme_change_mtu,
2857 .ndo_tx_timeout = jme_tx_timeout,
2858 .ndo_vlan_rx_register = jme_vlan_rx_register,
2859 .ndo_fix_features = jme_fix_features,
2860 .ndo_set_features = jme_set_features,
2861 };
2862
2863 static int __devinit
2864 jme_init_one(struct pci_dev *pdev,
2865 const struct pci_device_id *ent)
2866 {
2867 int rc = 0, using_dac, i;
2868 struct net_device *netdev;
2869 struct jme_adapter *jme;
2870 u16 bmcr, bmsr;
2871 u32 apmc;
2872
2873 /*
2874 * set up PCI device basics
2875 */
2876 rc = pci_enable_device(pdev);
2877 if (rc) {
2878 pr_err("Cannot enable PCI device\n");
2879 goto err_out;
2880 }
2881
2882 using_dac = jme_pci_dma64(pdev);
2883 if (using_dac < 0) {
2884 pr_err("Cannot set PCI DMA Mask\n");
2885 rc = -EIO;
2886 goto err_out_disable_pdev;
2887 }
2888
2889 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2890 pr_err("No PCI resource region found\n");
2891 rc = -ENOMEM;
2892 goto err_out_disable_pdev;
2893 }
2894
2895 rc = pci_request_regions(pdev, DRV_NAME);
2896 if (rc) {
2897 pr_err("Cannot obtain PCI resource region\n");
2898 goto err_out_disable_pdev;
2899 }
2900
2901 pci_set_master(pdev);
2902
2903 /*
2904 * alloc and init net device
2905 */
2906 netdev = alloc_etherdev(sizeof(*jme));
2907 if (!netdev) {
2908 pr_err("Cannot allocate netdev structure\n");
2909 rc = -ENOMEM;
2910 goto err_out_release_regions;
2911 }
2912 netdev->netdev_ops = &jme_netdev_ops;
2913 netdev->ethtool_ops = &jme_ethtool_ops;
2914 netdev->watchdog_timeo = TX_TIMEOUT;
2915 netdev->hw_features = NETIF_F_IP_CSUM |
2916 NETIF_F_IPV6_CSUM |
2917 NETIF_F_SG |
2918 NETIF_F_TSO |
2919 NETIF_F_TSO6 |
2920 NETIF_F_RXCSUM;
2921 netdev->features = NETIF_F_IP_CSUM |
2922 NETIF_F_IPV6_CSUM |
2923 NETIF_F_SG |
2924 NETIF_F_TSO |
2925 NETIF_F_TSO6 |
2926 NETIF_F_HW_VLAN_TX |
2927 NETIF_F_HW_VLAN_RX;
2928 if (using_dac)
2929 netdev->features |= NETIF_F_HIGHDMA;
2930
2931 SET_NETDEV_DEV(netdev, &pdev->dev);
2932 pci_set_drvdata(pdev, netdev);
2933
2934 /*
2935 * init adapter info
2936 */
2937 jme = netdev_priv(netdev);
2938 jme->pdev = pdev;
2939 jme->dev = netdev;
2940 jme->jme_rx = netif_rx;
2941 jme->jme_vlan_rx = vlan_hwaccel_rx;
2942 jme->old_mtu = netdev->mtu = 1500;
2943 jme->phylink = 0;
2944 jme->tx_ring_size = 1 << 10;
2945 jme->tx_ring_mask = jme->tx_ring_size - 1;
2946 jme->tx_wake_threshold = 1 << 9;
2947 jme->rx_ring_size = 1 << 9;
2948 jme->rx_ring_mask = jme->rx_ring_size - 1;
2949 jme->msg_enable = JME_DEF_MSG_ENABLE;
2950 jme->regs = ioremap(pci_resource_start(pdev, 0),
2951 pci_resource_len(pdev, 0));
2952 if (!(jme->regs)) {
2953 pr_err("Mapping PCI resource region error\n");
2954 rc = -ENOMEM;
2955 goto err_out_free_netdev;
2956 }
2957
2958 if (no_pseudohp) {
2959 apmc = jread32(jme, JME_APMC) & ~JME_APMC_PSEUDO_HP_EN;
2960 jwrite32(jme, JME_APMC, apmc);
2961 } else if (force_pseudohp) {
2962 apmc = jread32(jme, JME_APMC) | JME_APMC_PSEUDO_HP_EN;
2963 jwrite32(jme, JME_APMC, apmc);
2964 }
2965
2966 NETIF_NAPI_SET(netdev, &jme->napi, jme_poll, jme->rx_ring_size >> 2)
2967
2968 spin_lock_init(&jme->phy_lock);
2969 spin_lock_init(&jme->macaddr_lock);
2970 spin_lock_init(&jme->rxmcs_lock);
2971
2972 atomic_set(&jme->link_changing, 1);
2973 atomic_set(&jme->rx_cleaning, 1);
2974 atomic_set(&jme->tx_cleaning, 1);
2975 atomic_set(&jme->rx_empty, 1);
2976
2977 tasklet_init(&jme->pcc_task,
2978 jme_pcc_tasklet,
2979 (unsigned long) jme);
2980 tasklet_init(&jme->linkch_task,
2981 jme_link_change_tasklet,
2982 (unsigned long) jme);
2983 tasklet_init(&jme->txclean_task,
2984 jme_tx_clean_tasklet,
2985 (unsigned long) jme);
2986 tasklet_init(&jme->rxclean_task,
2987 jme_rx_clean_tasklet,
2988 (unsigned long) jme);
2989 tasklet_init(&jme->rxempty_task,
2990 jme_rx_empty_tasklet,
2991 (unsigned long) jme);
2992 tasklet_disable_nosync(&jme->linkch_task);
2993 tasklet_disable_nosync(&jme->txclean_task);
2994 tasklet_disable_nosync(&jme->rxclean_task);
2995 tasklet_disable_nosync(&jme->rxempty_task);
2996 jme->dpi.cur = PCC_P1;
2997
2998 jme->reg_ghc = 0;
2999 jme->reg_rxcs = RXCS_DEFAULT;
3000 jme->reg_rxmcs = RXMCS_DEFAULT;
3001 jme->reg_txpfc = 0;
3002 jme->reg_pmcs = PMCS_MFEN;
3003 jme->reg_gpreg1 = GPREG1_DEFAULT;
3004
3005 if (jme->reg_rxmcs & RXMCS_CHECKSUM)
3006 netdev->features |= NETIF_F_RXCSUM;
3007
3008 /*
3009 * Get Max Read Req Size from PCI Config Space
3010 */
3011 pci_read_config_byte(pdev, PCI_DCSR_MRRS, &jme->mrrs);
3012 jme->mrrs &= PCI_DCSR_MRRS_MASK;
3013 switch (jme->mrrs) {
3014 case MRRS_128B:
3015 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_128B;
3016 break;
3017 case MRRS_256B:
3018 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_256B;
3019 break;
3020 default:
3021 jme->reg_txcs = TXCS_DEFAULT | TXCS_DMASIZE_512B;
3022 break;
3023 }
3024
3025 /*
3026 * Must check before reset_mac_processor
3027 */
3028 jme_check_hw_ver(jme);
3029 jme->mii_if.dev = netdev;
3030 if (jme->fpgaver) {
3031 jme->mii_if.phy_id = 0;
3032 for (i = 1 ; i < 32 ; ++i) {
3033 bmcr = jme_mdio_read(netdev, i, MII_BMCR);
3034 bmsr = jme_mdio_read(netdev, i, MII_BMSR);
3035 if (bmcr != 0xFFFFU && (bmcr != 0 || bmsr != 0)) {
3036 jme->mii_if.phy_id = i;
3037 break;
3038 }
3039 }
3040
3041 if (!jme->mii_if.phy_id) {
3042 rc = -EIO;
3043 pr_err("Can not find phy_id\n");
3044 goto err_out_unmap;
3045 }
3046
3047 jme->reg_ghc |= GHC_LINK_POLL;
3048 } else {
3049 jme->mii_if.phy_id = 1;
3050 }
3051 if (pdev->device == PCI_DEVICE_ID_JMICRON_JMC250)
3052 jme->mii_if.supports_gmii = true;
3053 else
3054 jme->mii_if.supports_gmii = false;
3055 jme->mii_if.phy_id_mask = 0x1F;
3056 jme->mii_if.reg_num_mask = 0x1F;
3057 jme->mii_if.mdio_read = jme_mdio_read;
3058 jme->mii_if.mdio_write = jme_mdio_write;
3059
3060 jme_clear_pm(jme);
3061 jme_set_phyfifo_5level(jme);
3062 jme->pcirev = pdev->revision;
3063 if (!jme->fpgaver)
3064 jme_phy_init(jme);
3065 jme_phy_off(jme);
3066
3067 /*
3068 * Reset MAC processor and reload EEPROM for MAC Address
3069 */
3070 jme_reset_mac_processor(jme);
3071 rc = jme_reload_eeprom(jme);
3072 if (rc) {
3073 pr_err("Reload eeprom for reading MAC Address error\n");
3074 goto err_out_unmap;
3075 }
3076 jme_load_macaddr(netdev);
3077
3078 /*
3079 * Tell stack that we are not ready to work until open()
3080 */
3081 netif_carrier_off(netdev);
3082
3083 rc = register_netdev(netdev);
3084 if (rc) {
3085 pr_err("Cannot register net device\n");
3086 goto err_out_unmap;
3087 }
3088
3089 netif_info(jme, probe, jme->dev, "%s%s chiprev:%x pcirev:%x macaddr:%pM\n",
3090 (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC250) ?
3091 "JMC250 Gigabit Ethernet" :
3092 (jme->pdev->device == PCI_DEVICE_ID_JMICRON_JMC260) ?
3093 "JMC260 Fast Ethernet" : "Unknown",
3094 (jme->fpgaver != 0) ? " (FPGA)" : "",
3095 (jme->fpgaver != 0) ? jme->fpgaver : jme->chiprev,
3096 jme->pcirev, netdev->dev_addr);
3097
3098 return 0;
3099
3100 err_out_unmap:
3101 iounmap(jme->regs);
3102 err_out_free_netdev:
3103 pci_set_drvdata(pdev, NULL);
3104 free_netdev(netdev);
3105 err_out_release_regions:
3106 pci_release_regions(pdev);
3107 err_out_disable_pdev:
3108 pci_disable_device(pdev);
3109 err_out:
3110 return rc;
3111 }
3112
3113 static void __devexit
3114 jme_remove_one(struct pci_dev *pdev)
3115 {
3116 struct net_device *netdev = pci_get_drvdata(pdev);
3117 struct jme_adapter *jme = netdev_priv(netdev);
3118
3119 unregister_netdev(netdev);
3120 iounmap(jme->regs);
3121 pci_set_drvdata(pdev, NULL);
3122 free_netdev(netdev);
3123 pci_release_regions(pdev);
3124 pci_disable_device(pdev);
3125
3126 }
3127
3128 static void
3129 jme_shutdown(struct pci_dev *pdev)
3130 {
3131 struct net_device *netdev = pci_get_drvdata(pdev);
3132 struct jme_adapter *jme = netdev_priv(netdev);
3133
3134 jme_powersave_phy(jme);
3135 pci_pme_active(pdev, true);
3136 }
3137
3138 #ifdef CONFIG_PM
3139 static int jme_suspend(struct device *dev)
3140 {
3141 struct pci_dev *pdev = to_pci_dev(dev);
3142 struct net_device *netdev = pci_get_drvdata(pdev);
3143 struct jme_adapter *jme = netdev_priv(netdev);
3144
3145 atomic_dec(&jme->link_changing);
3146
3147 netif_device_detach(netdev);
3148 netif_stop_queue(netdev);
3149 jme_stop_irq(jme);
3150
3151 tasklet_disable(&jme->txclean_task);
3152 tasklet_disable(&jme->rxclean_task);
3153 tasklet_disable(&jme->rxempty_task);
3154
3155 if (netif_carrier_ok(netdev)) {
3156 if (test_bit(JME_FLAG_POLL, &jme->flags))
3157 jme_polling_mode(jme);
3158
3159 jme_stop_pcc_timer(jme);
3160 jme_disable_rx_engine(jme);
3161 jme_disable_tx_engine(jme);
3162 jme_reset_mac_processor(jme);
3163 jme_free_rx_resources(jme);
3164 jme_free_tx_resources(jme);
3165 netif_carrier_off(netdev);
3166 jme->phylink = 0;
3167 }
3168
3169 tasklet_enable(&jme->txclean_task);
3170 tasklet_hi_enable(&jme->rxclean_task);
3171 tasklet_hi_enable(&jme->rxempty_task);
3172
3173 jme_powersave_phy(jme);
3174
3175 return 0;
3176 }
3177
3178 static int jme_resume(struct device *dev)
3179 {
3180 struct pci_dev *pdev = to_pci_dev(dev);
3181 struct net_device *netdev = pci_get_drvdata(pdev);
3182 struct jme_adapter *jme = netdev_priv(netdev);
3183
3184 jwrite32(jme, JME_PMCS, 0xFFFF0000 | jme->reg_pmcs);
3185
3186 jme_phy_on(jme);
3187 if (test_bit(JME_FLAG_SSET, &jme->flags))
3188 jme_set_settings(netdev, &jme->old_ecmd);
3189 else
3190 jme_reset_phy_processor(jme);
3191
3192 jme_start_irq(jme);
3193 netif_device_attach(netdev);
3194
3195 atomic_inc(&jme->link_changing);
3196
3197 jme_reset_link(jme);
3198
3199 return 0;
3200 }
3201
3202 static SIMPLE_DEV_PM_OPS(jme_pm_ops, jme_suspend, jme_resume);
3203 #define JME_PM_OPS (&jme_pm_ops)
3204
3205 #else
3206
3207 #define JME_PM_OPS NULL
3208 #endif
3209
3210 static DEFINE_PCI_DEVICE_TABLE(jme_pci_tbl) = {
3211 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC250) },
3212 { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMC260) },
3213 { }
3214 };
3215
3216 static struct pci_driver jme_driver = {
3217 .name = DRV_NAME,
3218 .id_table = jme_pci_tbl,
3219 .probe = jme_init_one,
3220 .remove = __devexit_p(jme_remove_one),
3221 .shutdown = jme_shutdown,
3222 .driver.pm = JME_PM_OPS,
3223 };
3224
3225 static int __init
3226 jme_init_module(void)
3227 {
3228 pr_info("JMicron JMC2XX ethernet driver version %s\n", DRV_VERSION);
3229 return pci_register_driver(&jme_driver);
3230 }
3231
3232 static void __exit
3233 jme_cleanup_module(void)
3234 {
3235 pci_unregister_driver(&jme_driver);
3236 }
3237
3238 module_init(jme_init_module);
3239 module_exit(jme_cleanup_module);
3240
3241 MODULE_AUTHOR("Guo-Fu Tseng <cooldavid@cooldavid.org>");
3242 MODULE_DESCRIPTION("JMicron JMC2x0 PCI Express Ethernet driver");
3243 MODULE_LICENSE("GPL");
3244 MODULE_VERSION(DRV_VERSION);
3245 MODULE_DEVICE_TABLE(pci, jme_pci_tbl);
3246
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree