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Linux 4.19.133
[linux/fpc-iii.git] / drivers / net / ethernet / broadcom / sb1250-mac.c
blob7e3f9642ba6c56d04b8b0d1968a15da4edf19418
1 /*
2 * Copyright (C) 2001,2002,2003,2004 Broadcom Corporation
3 * Copyright (c) 2006, 2007 Maciej W. Rozycki
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 *
18 *
19 * This driver is designed for the Broadcom SiByte SOC built-in
20 * Ethernet controllers. Written by Mitch Lichtenberg at Broadcom Corp.
21 *
22 * Updated to the driver model and the PHY abstraction layer
23 * by Maciej W. Rozycki.
24 */
25
26 #include <linux/bug.h>
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/string.h>
30 #include <linux/timer.h>
31 #include <linux/errno.h>
32 #include <linux/ioport.h>
33 #include <linux/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/netdevice.h>
36 #include <linux/etherdevice.h>
37 #include <linux/skbuff.h>
38 #include <linux/bitops.h>
39 #include <linux/err.h>
40 #include <linux/ethtool.h>
41 #include <linux/mii.h>
42 #include <linux/phy.h>
43 #include <linux/platform_device.h>
44 #include <linux/prefetch.h>
45
46 #include <asm/cache.h>
47 #include <asm/io.h>
48 #include <asm/processor.h> /* Processor type for cache alignment. */
49
50 /* Operational parameters that usually are not changed. */
51
52 #define CONFIG_SBMAC_COALESCE
53
54 /* Time in jiffies before concluding the transmitter is hung. */
55 #define TX_TIMEOUT (2*HZ)
56
57
58 MODULE_AUTHOR("Mitch Lichtenberg (Broadcom Corp.)");
59 MODULE_DESCRIPTION("Broadcom SiByte SOC GB Ethernet driver");
60
61 /* A few user-configurable values which may be modified when a driver
62 module is loaded. */
63
64 /* 1 normal messages, 0 quiet .. 7 verbose. */
65 static int debug = 1;
66 module_param(debug, int, 0444);
67 MODULE_PARM_DESC(debug, "Debug messages");
68
69 #ifdef CONFIG_SBMAC_COALESCE
70 static int int_pktcnt_tx = 255;
71 module_param(int_pktcnt_tx, int, 0444);
72 MODULE_PARM_DESC(int_pktcnt_tx, "TX packet count");
73
74 static int int_timeout_tx = 255;
75 module_param(int_timeout_tx, int, 0444);
76 MODULE_PARM_DESC(int_timeout_tx, "TX timeout value");
77
78 static int int_pktcnt_rx = 64;
79 module_param(int_pktcnt_rx, int, 0444);
80 MODULE_PARM_DESC(int_pktcnt_rx, "RX packet count");
81
82 static int int_timeout_rx = 64;
83 module_param(int_timeout_rx, int, 0444);
84 MODULE_PARM_DESC(int_timeout_rx, "RX timeout value");
85 #endif
86
87 #include <asm/sibyte/board.h>
88 #include <asm/sibyte/sb1250.h>
89 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
90 #include <asm/sibyte/bcm1480_regs.h>
91 #include <asm/sibyte/bcm1480_int.h>
92 #define R_MAC_DMA_OODPKTLOST_RX R_MAC_DMA_OODPKTLOST
93 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
94 #include <asm/sibyte/sb1250_regs.h>
95 #include <asm/sibyte/sb1250_int.h>
96 #else
97 #error invalid SiByte MAC configuration
98 #endif
99 #include <asm/sibyte/sb1250_scd.h>
100 #include <asm/sibyte/sb1250_mac.h>
101 #include <asm/sibyte/sb1250_dma.h>
102
103 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
104 #define UNIT_INT(n) (K_BCM1480_INT_MAC_0 + ((n) * 2))
105 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
106 #define UNIT_INT(n) (K_INT_MAC_0 + (n))
107 #else
108 #error invalid SiByte MAC configuration
109 #endif
110
111 #ifdef K_INT_PHY
112 #define SBMAC_PHY_INT K_INT_PHY
113 #else
114 #define SBMAC_PHY_INT PHY_POLL
115 #endif
116
117 /**********************************************************************
118 * Simple types
119 ********************************************************************* */
120
121 enum sbmac_speed {
122 sbmac_speed_none = 0,
123 sbmac_speed_10 = SPEED_10,
124 sbmac_speed_100 = SPEED_100,
125 sbmac_speed_1000 = SPEED_1000,
126 };
127
128 enum sbmac_duplex {
129 sbmac_duplex_none = -1,
130 sbmac_duplex_half = DUPLEX_HALF,
131 sbmac_duplex_full = DUPLEX_FULL,
132 };
133
134 enum sbmac_fc {
135 sbmac_fc_none,
136 sbmac_fc_disabled,
137 sbmac_fc_frame,
138 sbmac_fc_collision,
139 sbmac_fc_carrier,
140 };
141
142 enum sbmac_state {
143 sbmac_state_uninit,
144 sbmac_state_off,
145 sbmac_state_on,
146 sbmac_state_broken,
147 };
148
149
150 /**********************************************************************
151 * Macros
152 ********************************************************************* */
153
154
155 #define SBDMA_NEXTBUF(d,f) ((((d)->f+1) == (d)->sbdma_dscrtable_end) ? \
156 (d)->sbdma_dscrtable : (d)->f+1)
157
158
159 #define NUMCACHEBLKS(x) (((x)+SMP_CACHE_BYTES-1)/SMP_CACHE_BYTES)
160
161 #define SBMAC_MAX_TXDESCR 256
162 #define SBMAC_MAX_RXDESCR 256
163
164 #define ENET_PACKET_SIZE 1518
165 /*#define ENET_PACKET_SIZE 9216 */
166
167 /**********************************************************************
168 * DMA Descriptor structure
169 ********************************************************************* */
170
171 struct sbdmadscr {
172 uint64_t dscr_a;
173 uint64_t dscr_b;
174 };
175
176 /**********************************************************************
177 * DMA Controller structure
178 ********************************************************************* */
179
180 struct sbmacdma {
181
182 /*
183 * This stuff is used to identify the channel and the registers
184 * associated with it.
185 */
186 struct sbmac_softc *sbdma_eth; /* back pointer to associated
187 MAC */
188 int sbdma_channel; /* channel number */
189 int sbdma_txdir; /* direction (1=transmit) */
190 int sbdma_maxdescr; /* total # of descriptors
191 in ring */
192 #ifdef CONFIG_SBMAC_COALESCE
193 int sbdma_int_pktcnt;
194 /* # descriptors rx/tx
195 before interrupt */
196 int sbdma_int_timeout;
197 /* # usec rx/tx interrupt */
198 #endif
199 void __iomem *sbdma_config0; /* DMA config register 0 */
200 void __iomem *sbdma_config1; /* DMA config register 1 */
201 void __iomem *sbdma_dscrbase;
202 /* descriptor base address */
203 void __iomem *sbdma_dscrcnt; /* descriptor count register */
204 void __iomem *sbdma_curdscr; /* current descriptor
205 address */
206 void __iomem *sbdma_oodpktlost;
207 /* pkt drop (rx only) */
208
209 /*
210 * This stuff is for maintenance of the ring
211 */
212 void *sbdma_dscrtable_unaligned;
213 struct sbdmadscr *sbdma_dscrtable;
214 /* base of descriptor table */
215 struct sbdmadscr *sbdma_dscrtable_end;
216 /* end of descriptor table */
217 struct sk_buff **sbdma_ctxtable;
218 /* context table, one
219 per descr */
220 dma_addr_t sbdma_dscrtable_phys;
221 /* and also the phys addr */
222 struct sbdmadscr *sbdma_addptr; /* next dscr for sw to add */
223 struct sbdmadscr *sbdma_remptr; /* next dscr for sw
224 to remove */
225 };
226
227
228 /**********************************************************************
229 * Ethernet softc structure
230 ********************************************************************* */
231
232 struct sbmac_softc {
233
234 /*
235 * Linux-specific things
236 */
237 struct net_device *sbm_dev; /* pointer to linux device */
238 struct napi_struct napi;
239 struct phy_device *phy_dev; /* the associated PHY device */
240 struct mii_bus *mii_bus; /* the MII bus */
241 spinlock_t sbm_lock; /* spin lock */
242 int sbm_devflags; /* current device flags */
243
244 /*
245 * Controller-specific things
246 */
247 void __iomem *sbm_base; /* MAC's base address */
248 enum sbmac_state sbm_state; /* current state */
249
250 void __iomem *sbm_macenable; /* MAC Enable Register */
251 void __iomem *sbm_maccfg; /* MAC Config Register */
252 void __iomem *sbm_fifocfg; /* FIFO Config Register */
253 void __iomem *sbm_framecfg; /* Frame Config Register */
254 void __iomem *sbm_rxfilter; /* Receive Filter Register */
255 void __iomem *sbm_isr; /* Interrupt Status Register */
256 void __iomem *sbm_imr; /* Interrupt Mask Register */
257 void __iomem *sbm_mdio; /* MDIO Register */
258
259 enum sbmac_speed sbm_speed; /* current speed */
260 enum sbmac_duplex sbm_duplex; /* current duplex */
261 enum sbmac_fc sbm_fc; /* cur. flow control setting */
262 int sbm_pause; /* current pause setting */
263 int sbm_link; /* current link state */
264
265 unsigned char sbm_hwaddr[ETH_ALEN];
266
267 struct sbmacdma sbm_txdma; /* only channel 0 for now */
268 struct sbmacdma sbm_rxdma;
269 int rx_hw_checksum;
270 int sbe_idx;
271 };
272
273
274 /**********************************************************************
275 * Externs
276 ********************************************************************* */
277
278 /**********************************************************************
279 * Prototypes
280 ********************************************************************* */
281
282 static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan,
283 int txrx, int maxdescr);
284 static void sbdma_channel_start(struct sbmacdma *d, int rxtx);
285 static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d,
286 struct sk_buff *m);
287 static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *m);
288 static void sbdma_emptyring(struct sbmacdma *d);
289 static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d);
290 static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d,
291 int work_to_do, int poll);
292 static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d,
293 int poll);
294 static int sbmac_initctx(struct sbmac_softc *s);
295 static void sbmac_channel_start(struct sbmac_softc *s);
296 static void sbmac_channel_stop(struct sbmac_softc *s);
297 static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *,
298 enum sbmac_state);
299 static void sbmac_promiscuous_mode(struct sbmac_softc *sc, int onoff);
300 static uint64_t sbmac_addr2reg(unsigned char *ptr);
301 static irqreturn_t sbmac_intr(int irq, void *dev_instance);
302 static netdev_tx_t sbmac_start_tx(struct sk_buff *skb, struct net_device *dev);
303 static void sbmac_setmulti(struct sbmac_softc *sc);
304 static int sbmac_init(struct platform_device *pldev, long long base);
305 static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed);
306 static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex,
307 enum sbmac_fc fc);
308
309 static int sbmac_open(struct net_device *dev);
310 static void sbmac_tx_timeout (struct net_device *dev);
311 static void sbmac_set_rx_mode(struct net_device *dev);
312 static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
313 static int sbmac_close(struct net_device *dev);
314 static int sbmac_poll(struct napi_struct *napi, int budget);
315
316 static void sbmac_mii_poll(struct net_device *dev);
317 static int sbmac_mii_probe(struct net_device *dev);
318
319 static void sbmac_mii_sync(void __iomem *sbm_mdio);
320 static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data,
321 int bitcnt);
322 static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx);
323 static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
324 u16 val);
325
326
327 /**********************************************************************
328 * Globals
329 ********************************************************************* */
330
331 static char sbmac_string[] = "sb1250-mac";
332
333 static char sbmac_mdio_string[] = "sb1250-mac-mdio";
334
335
336 /**********************************************************************
337 * MDIO constants
338 ********************************************************************* */
339
340 #define MII_COMMAND_START 0x01
341 #define MII_COMMAND_READ 0x02
342 #define MII_COMMAND_WRITE 0x01
343 #define MII_COMMAND_ACK 0x02
344
345 #define M_MAC_MDIO_DIR_OUTPUT 0 /* for clarity */
346
347 #define ENABLE 1
348 #define DISABLE 0
349
350 /**********************************************************************
351 * SBMAC_MII_SYNC(sbm_mdio)
352 *
353 * Synchronize with the MII - send a pattern of bits to the MII
354 * that will guarantee that it is ready to accept a command.
355 *
356 * Input parameters:
357 * sbm_mdio - address of the MAC's MDIO register
358 *
359 * Return value:
360 * nothing
361 ********************************************************************* */
362
363 static void sbmac_mii_sync(void __iomem *sbm_mdio)
364 {
365 int cnt;
366 uint64_t bits;
367 int mac_mdio_genc;
368
369 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
370
371 bits = M_MAC_MDIO_DIR_OUTPUT | M_MAC_MDIO_OUT;
372
373 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
374
375 for (cnt = 0; cnt < 32; cnt++) {
376 __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio);
377 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
378 }
379 }
380
381 /**********************************************************************
382 * SBMAC_MII_SENDDATA(sbm_mdio, data, bitcnt)
383 *
384 * Send some bits to the MII. The bits to be sent are right-
385 * justified in the 'data' parameter.
386 *
387 * Input parameters:
388 * sbm_mdio - address of the MAC's MDIO register
389 * data - data to send
390 * bitcnt - number of bits to send
391 ********************************************************************* */
392
393 static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data,
394 int bitcnt)
395 {
396 int i;
397 uint64_t bits;
398 unsigned int curmask;
399 int mac_mdio_genc;
400
401 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
402
403 bits = M_MAC_MDIO_DIR_OUTPUT;
404 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
405
406 curmask = 1 << (bitcnt - 1);
407
408 for (i = 0; i < bitcnt; i++) {
409 if (data & curmask)
410 bits |= M_MAC_MDIO_OUT;
411 else bits &= ~M_MAC_MDIO_OUT;
412 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
413 __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio);
414 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
415 curmask >>= 1;
416 }
417 }
418
419
420
421 /**********************************************************************
422 * SBMAC_MII_READ(bus, phyaddr, regidx)
423 * Read a PHY register.
424 *
425 * Input parameters:
426 * bus - MDIO bus handle
427 * phyaddr - PHY's address
428 * regnum - index of register to read
429 *
430 * Return value:
431 * value read, or 0xffff if an error occurred.
432 ********************************************************************* */
433
434 static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
435 {
436 struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv;
437 void __iomem *sbm_mdio = sc->sbm_mdio;
438 int idx;
439 int error;
440 int regval;
441 int mac_mdio_genc;
442
443 /*
444 * Synchronize ourselves so that the PHY knows the next
445 * thing coming down is a command
446 */
447 sbmac_mii_sync(sbm_mdio);
448
449 /*
450 * Send the data to the PHY. The sequence is
451 * a "start" command (2 bits)
452 * a "read" command (2 bits)
453 * the PHY addr (5 bits)
454 * the register index (5 bits)
455 */
456 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2);
457 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_READ, 2);
458 sbmac_mii_senddata(sbm_mdio, phyaddr, 5);
459 sbmac_mii_senddata(sbm_mdio, regidx, 5);
460
461 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
462
463 /*
464 * Switch the port around without a clock transition.
465 */
466 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
467
468 /*
469 * Send out a clock pulse to signal we want the status
470 */
471 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
472 sbm_mdio);
473 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
474
475 /*
476 * If an error occurred, the PHY will signal '1' back
477 */
478 error = __raw_readq(sbm_mdio) & M_MAC_MDIO_IN;
479
480 /*
481 * Issue an 'idle' clock pulse, but keep the direction
482 * the same.
483 */
484 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
485 sbm_mdio);
486 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
487
488 regval = 0;
489
490 for (idx = 0; idx < 16; idx++) {
491 regval <<= 1;
492
493 if (error == 0) {
494 if (__raw_readq(sbm_mdio) & M_MAC_MDIO_IN)
495 regval |= 1;
496 }
497
498 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
499 sbm_mdio);
500 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
501 }
502
503 /* Switch back to output */
504 __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio);
505
506 if (error == 0)
507 return regval;
508 return 0xffff;
509 }
510
511
512 /**********************************************************************
513 * SBMAC_MII_WRITE(bus, phyaddr, regidx, regval)
514 *
515 * Write a value to a PHY register.
516 *
517 * Input parameters:
518 * bus - MDIO bus handle
519 * phyaddr - PHY to use
520 * regidx - register within the PHY
521 * regval - data to write to register
522 *
523 * Return value:
524 * 0 for success
525 ********************************************************************* */
526
527 static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
528 u16 regval)
529 {
530 struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv;
531 void __iomem *sbm_mdio = sc->sbm_mdio;
532 int mac_mdio_genc;
533
534 sbmac_mii_sync(sbm_mdio);
535
536 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2);
537 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_WRITE, 2);
538 sbmac_mii_senddata(sbm_mdio, phyaddr, 5);
539 sbmac_mii_senddata(sbm_mdio, regidx, 5);
540 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_ACK, 2);
541 sbmac_mii_senddata(sbm_mdio, regval, 16);
542
543 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
544
545 __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio);
546
547 return 0;
548 }
549
550
551
552 /**********************************************************************
553 * SBDMA_INITCTX(d,s,chan,txrx,maxdescr)
554 *
555 * Initialize a DMA channel context. Since there are potentially
556 * eight DMA channels per MAC, it's nice to do this in a standard
557 * way.
558 *
559 * Input parameters:
560 * d - struct sbmacdma (DMA channel context)
561 * s - struct sbmac_softc (pointer to a MAC)
562 * chan - channel number (0..1 right now)
563 * txrx - Identifies DMA_TX or DMA_RX for channel direction
564 * maxdescr - number of descriptors
565 *
566 * Return value:
567 * nothing
568 ********************************************************************* */
569
570 static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan,
571 int txrx, int maxdescr)
572 {
573 #ifdef CONFIG_SBMAC_COALESCE
574 int int_pktcnt, int_timeout;
575 #endif
576
577 /*
578 * Save away interesting stuff in the structure
579 */
580
581 d->sbdma_eth = s;
582 d->sbdma_channel = chan;
583 d->sbdma_txdir = txrx;
584
585 #if 0
586 /* RMON clearing */
587 s->sbe_idx =(s->sbm_base - A_MAC_BASE_0)/MAC_SPACING;
588 #endif
589
590 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BYTES);
591 __raw_writeq(0, s->sbm_base + R_MAC_RMON_COLLISIONS);
592 __raw_writeq(0, s->sbm_base + R_MAC_RMON_LATE_COL);
593 __raw_writeq(0, s->sbm_base + R_MAC_RMON_EX_COL);
594 __raw_writeq(0, s->sbm_base + R_MAC_RMON_FCS_ERROR);
595 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_ABORT);
596 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BAD);
597 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_GOOD);
598 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_RUNT);
599 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_OVERSIZE);
600 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BYTES);
601 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_MCAST);
602 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BCAST);
603 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BAD);
604 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_GOOD);
605 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_RUNT);
606 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_OVERSIZE);
607 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_FCS_ERROR);
608 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_LENGTH_ERROR);
609 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_CODE_ERROR);
610 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_ALIGN_ERROR);
611
612 /*
613 * initialize register pointers
614 */
615
616 d->sbdma_config0 =
617 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG0);
618 d->sbdma_config1 =
619 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG1);
620 d->sbdma_dscrbase =
621 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_BASE);
622 d->sbdma_dscrcnt =
623 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_CNT);
624 d->sbdma_curdscr =
625 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CUR_DSCRADDR);
626 if (d->sbdma_txdir)
627 d->sbdma_oodpktlost = NULL;
628 else
629 d->sbdma_oodpktlost =
630 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_OODPKTLOST_RX);
631
632 /*
633 * Allocate memory for the ring
634 */
635
636 d->sbdma_maxdescr = maxdescr;
637
638 d->sbdma_dscrtable_unaligned = kcalloc(d->sbdma_maxdescr + 1,
639 sizeof(*d->sbdma_dscrtable),
640 GFP_KERNEL);
641
642 /*
643 * The descriptor table must be aligned to at least 16 bytes or the
644 * MAC will corrupt it.
645 */
646 d->sbdma_dscrtable = (struct sbdmadscr *)
647 ALIGN((unsigned long)d->sbdma_dscrtable_unaligned,
648 sizeof(*d->sbdma_dscrtable));
649
650 d->sbdma_dscrtable_end = d->sbdma_dscrtable + d->sbdma_maxdescr;
651
652 d->sbdma_dscrtable_phys = virt_to_phys(d->sbdma_dscrtable);
653
654 /*
655 * And context table
656 */
657
658 d->sbdma_ctxtable = kcalloc(d->sbdma_maxdescr,
659 sizeof(*d->sbdma_ctxtable), GFP_KERNEL);
660
661 #ifdef CONFIG_SBMAC_COALESCE
662 /*
663 * Setup Rx/Tx DMA coalescing defaults
664 */
665
666 int_pktcnt = (txrx == DMA_TX) ? int_pktcnt_tx : int_pktcnt_rx;
667 if ( int_pktcnt ) {
668 d->sbdma_int_pktcnt = int_pktcnt;
669 } else {
670 d->sbdma_int_pktcnt = 1;
671 }
672
673 int_timeout = (txrx == DMA_TX) ? int_timeout_tx : int_timeout_rx;
674 if ( int_timeout ) {
675 d->sbdma_int_timeout = int_timeout;
676 } else {
677 d->sbdma_int_timeout = 0;
678 }
679 #endif
680
681 }
682
683 /**********************************************************************
684 * SBDMA_CHANNEL_START(d)
685 *
686 * Initialize the hardware registers for a DMA channel.
687 *
688 * Input parameters:
689 * d - DMA channel to init (context must be previously init'd
690 * rxtx - DMA_RX or DMA_TX depending on what type of channel
691 *
692 * Return value:
693 * nothing
694 ********************************************************************* */
695
696 static void sbdma_channel_start(struct sbmacdma *d, int rxtx)
697 {
698 /*
699 * Turn on the DMA channel
700 */
701
702 #ifdef CONFIG_SBMAC_COALESCE
703 __raw_writeq(V_DMA_INT_TIMEOUT(d->sbdma_int_timeout) |
704 0, d->sbdma_config1);
705 __raw_writeq(M_DMA_EOP_INT_EN |
706 V_DMA_RINGSZ(d->sbdma_maxdescr) |
707 V_DMA_INT_PKTCNT(d->sbdma_int_pktcnt) |
708 0, d->sbdma_config0);
709 #else
710 __raw_writeq(0, d->sbdma_config1);
711 __raw_writeq(V_DMA_RINGSZ(d->sbdma_maxdescr) |
712 0, d->sbdma_config0);
713 #endif
714
715 __raw_writeq(d->sbdma_dscrtable_phys, d->sbdma_dscrbase);
716
717 /*
718 * Initialize ring pointers
719 */
720
721 d->sbdma_addptr = d->sbdma_dscrtable;
722 d->sbdma_remptr = d->sbdma_dscrtable;
723 }
724
725 /**********************************************************************
726 * SBDMA_CHANNEL_STOP(d)
727 *
728 * Initialize the hardware registers for a DMA channel.
729 *
730 * Input parameters:
731 * d - DMA channel to init (context must be previously init'd
732 *
733 * Return value:
734 * nothing
735 ********************************************************************* */
736
737 static void sbdma_channel_stop(struct sbmacdma *d)
738 {
739 /*
740 * Turn off the DMA channel
741 */
742
743 __raw_writeq(0, d->sbdma_config1);
744
745 __raw_writeq(0, d->sbdma_dscrbase);
746
747 __raw_writeq(0, d->sbdma_config0);
748
749 /*
750 * Zero ring pointers
751 */
752
753 d->sbdma_addptr = NULL;
754 d->sbdma_remptr = NULL;
755 }
756
757 static inline void sbdma_align_skb(struct sk_buff *skb,
758 unsigned int power2, unsigned int offset)
759 {
760 unsigned char *addr = skb->data;
761 unsigned char *newaddr = PTR_ALIGN(addr, power2);
762
763 skb_reserve(skb, newaddr - addr + offset);
764 }
765
766
767 /**********************************************************************
768 * SBDMA_ADD_RCVBUFFER(d,sb)
769 *
770 * Add a buffer to the specified DMA channel. For receive channels,
771 * this queues a buffer for inbound packets.
772 *
773 * Input parameters:
774 * sc - softc structure
775 * d - DMA channel descriptor
776 * sb - sk_buff to add, or NULL if we should allocate one
777 *
778 * Return value:
779 * 0 if buffer could not be added (ring is full)
780 * 1 if buffer added successfully
781 ********************************************************************* */
782
783
784 static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d,
785 struct sk_buff *sb)
786 {
787 struct net_device *dev = sc->sbm_dev;
788 struct sbdmadscr *dsc;
789 struct sbdmadscr *nextdsc;
790 struct sk_buff *sb_new = NULL;
791 int pktsize = ENET_PACKET_SIZE;
792
793 /* get pointer to our current place in the ring */
794
795 dsc = d->sbdma_addptr;
796 nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
797
798 /*
799 * figure out if the ring is full - if the next descriptor
800 * is the same as the one that we're going to remove from
801 * the ring, the ring is full
802 */
803
804 if (nextdsc == d->sbdma_remptr) {
805 return -ENOSPC;
806 }
807
808 /*
809 * Allocate a sk_buff if we don't already have one.
810 * If we do have an sk_buff, reset it so that it's empty.
811 *
812 * Note: sk_buffs don't seem to be guaranteed to have any sort
813 * of alignment when they are allocated. Therefore, allocate enough
814 * extra space to make sure that:
815 *
816 * 1. the data does not start in the middle of a cache line.
817 * 2. The data does not end in the middle of a cache line
818 * 3. The buffer can be aligned such that the IP addresses are
819 * naturally aligned.
820 *
821 * Remember, the SOCs MAC writes whole cache lines at a time,
822 * without reading the old contents first. So, if the sk_buff's
823 * data portion starts in the middle of a cache line, the SOC
824 * DMA will trash the beginning (and ending) portions.
825 */
826
827 if (sb == NULL) {
828 sb_new = netdev_alloc_skb(dev, ENET_PACKET_SIZE +
829 SMP_CACHE_BYTES * 2 +
830 NET_IP_ALIGN);
831 if (sb_new == NULL)
832 return -ENOBUFS;
833
834 sbdma_align_skb(sb_new, SMP_CACHE_BYTES, NET_IP_ALIGN);
835 }
836 else {
837 sb_new = sb;
838 /*
839 * nothing special to reinit buffer, it's already aligned
840 * and sb->data already points to a good place.
841 */
842 }
843
844 /*
845 * fill in the descriptor
846 */
847
848 #ifdef CONFIG_SBMAC_COALESCE
849 /*
850 * Do not interrupt per DMA transfer.
851 */
852 dsc->dscr_a = virt_to_phys(sb_new->data) |
853 V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) | 0;
854 #else
855 dsc->dscr_a = virt_to_phys(sb_new->data) |
856 V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) |
857 M_DMA_DSCRA_INTERRUPT;
858 #endif
859
860 /* receiving: no options */
861 dsc->dscr_b = 0;
862
863 /*
864 * fill in the context
865 */
866
867 d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb_new;
868
869 /*
870 * point at next packet
871 */
872
873 d->sbdma_addptr = nextdsc;
874
875 /*
876 * Give the buffer to the DMA engine.
877 */
878
879 __raw_writeq(1, d->sbdma_dscrcnt);
880
881 return 0; /* we did it */
882 }
883
884 /**********************************************************************
885 * SBDMA_ADD_TXBUFFER(d,sb)
886 *
887 * Add a transmit buffer to the specified DMA channel, causing a
888 * transmit to start.
889 *
890 * Input parameters:
891 * d - DMA channel descriptor
892 * sb - sk_buff to add
893 *
894 * Return value:
895 * 0 transmit queued successfully
896 * otherwise error code
897 ********************************************************************* */
898
899
900 static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *sb)
901 {
902 struct sbdmadscr *dsc;
903 struct sbdmadscr *nextdsc;
904 uint64_t phys;
905 uint64_t ncb;
906 int length;
907
908 /* get pointer to our current place in the ring */
909
910 dsc = d->sbdma_addptr;
911 nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
912
913 /*
914 * figure out if the ring is full - if the next descriptor
915 * is the same as the one that we're going to remove from
916 * the ring, the ring is full
917 */
918
919 if (nextdsc == d->sbdma_remptr) {
920 return -ENOSPC;
921 }
922
923 /*
924 * Under Linux, it's not necessary to copy/coalesce buffers
925 * like it is on NetBSD. We think they're all contiguous,
926 * but that may not be true for GBE.
927 */
928
929 length = sb->len;
930
931 /*
932 * fill in the descriptor. Note that the number of cache
933 * blocks in the descriptor is the number of blocks
934 * *spanned*, so we need to add in the offset (if any)
935 * while doing the calculation.
936 */
937
938 phys = virt_to_phys(sb->data);
939 ncb = NUMCACHEBLKS(length+(phys & (SMP_CACHE_BYTES - 1)));
940
941 dsc->dscr_a = phys |
942 V_DMA_DSCRA_A_SIZE(ncb) |
943 #ifndef CONFIG_SBMAC_COALESCE
944 M_DMA_DSCRA_INTERRUPT |
945 #endif
946 M_DMA_ETHTX_SOP;
947
948 /* transmitting: set outbound options and length */
949
950 dsc->dscr_b = V_DMA_DSCRB_OPTIONS(K_DMA_ETHTX_APPENDCRC_APPENDPAD) |
951 V_DMA_DSCRB_PKT_SIZE(length);
952
953 /*
954 * fill in the context
955 */
956
957 d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb;
958
959 /*
960 * point at next packet
961 */
962
963 d->sbdma_addptr = nextdsc;
964
965 /*
966 * Give the buffer to the DMA engine.
967 */
968
969 __raw_writeq(1, d->sbdma_dscrcnt);
970
971 return 0; /* we did it */
972 }
973
974
975
976
977 /**********************************************************************
978 * SBDMA_EMPTYRING(d)
979 *
980 * Free all allocated sk_buffs on the specified DMA channel;
981 *
982 * Input parameters:
983 * d - DMA channel
984 *
985 * Return value:
986 * nothing
987 ********************************************************************* */
988
989 static void sbdma_emptyring(struct sbmacdma *d)
990 {
991 int idx;
992 struct sk_buff *sb;
993
994 for (idx = 0; idx < d->sbdma_maxdescr; idx++) {
995 sb = d->sbdma_ctxtable[idx];
996 if (sb) {
997 dev_kfree_skb(sb);
998 d->sbdma_ctxtable[idx] = NULL;
999 }
1000 }
1001 }
1002
1003
1004 /**********************************************************************
1005 * SBDMA_FILLRING(d)
1006 *
1007 * Fill the specified DMA channel (must be receive channel)
1008 * with sk_buffs
1009 *
1010 * Input parameters:
1011 * sc - softc structure
1012 * d - DMA channel
1013 *
1014 * Return value:
1015 * nothing
1016 ********************************************************************* */
1017
1018 static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d)
1019 {
1020 int idx;
1021
1022 for (idx = 0; idx < SBMAC_MAX_RXDESCR - 1; idx++) {
1023 if (sbdma_add_rcvbuffer(sc, d, NULL) != 0)
1024 break;
1025 }
1026 }
1027
1028 #ifdef CONFIG_NET_POLL_CONTROLLER
1029 static void sbmac_netpoll(struct net_device *netdev)
1030 {
1031 struct sbmac_softc *sc = netdev_priv(netdev);
1032 int irq = sc->sbm_dev->irq;
1033
1034 __raw_writeq(0, sc->sbm_imr);
1035
1036 sbmac_intr(irq, netdev);
1037
1038 #ifdef CONFIG_SBMAC_COALESCE
1039 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
1040 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
1041 sc->sbm_imr);
1042 #else
1043 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
1044 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
1045 #endif
1046 }
1047 #endif
1048
1049 /**********************************************************************
1050 * SBDMA_RX_PROCESS(sc,d,work_to_do,poll)
1051 *
1052 * Process "completed" receive buffers on the specified DMA channel.
1053 *
1054 * Input parameters:
1055 * sc - softc structure
1056 * d - DMA channel context
1057 * work_to_do - no. of packets to process before enabling interrupt
1058 * again (for NAPI)
1059 * poll - 1: using polling (for NAPI)
1060 *
1061 * Return value:
1062 * nothing
1063 ********************************************************************* */
1064
1065 static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d,
1066 int work_to_do, int poll)
1067 {
1068 struct net_device *dev = sc->sbm_dev;
1069 int curidx;
1070 int hwidx;
1071 struct sbdmadscr *dsc;
1072 struct sk_buff *sb;
1073 int len;
1074 int work_done = 0;
1075 int dropped = 0;
1076
1077 prefetch(d);
1078
1079 again:
1080 /* Check if the HW dropped any frames */
1081 dev->stats.rx_fifo_errors
1082 += __raw_readq(sc->sbm_rxdma.sbdma_oodpktlost) & 0xffff;
1083 __raw_writeq(0, sc->sbm_rxdma.sbdma_oodpktlost);
1084
1085 while (work_to_do-- > 0) {
1086 /*
1087 * figure out where we are (as an index) and where
1088 * the hardware is (also as an index)
1089 *
1090 * This could be done faster if (for example) the
1091 * descriptor table was page-aligned and contiguous in
1092 * both virtual and physical memory -- you could then
1093 * just compare the low-order bits of the virtual address
1094 * (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
1095 */
1096
1097 dsc = d->sbdma_remptr;
1098 curidx = dsc - d->sbdma_dscrtable;
1099
1100 prefetch(dsc);
1101 prefetch(&d->sbdma_ctxtable[curidx]);
1102
1103 hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
1104 d->sbdma_dscrtable_phys) /
1105 sizeof(*d->sbdma_dscrtable);
1106
1107 /*
1108 * If they're the same, that means we've processed all
1109 * of the descriptors up to (but not including) the one that
1110 * the hardware is working on right now.
1111 */
1112
1113 if (curidx == hwidx)
1114 goto done;
1115
1116 /*
1117 * Otherwise, get the packet's sk_buff ptr back
1118 */
1119
1120 sb = d->sbdma_ctxtable[curidx];
1121 d->sbdma_ctxtable[curidx] = NULL;
1122
1123 len = (int)G_DMA_DSCRB_PKT_SIZE(dsc->dscr_b) - 4;
1124
1125 /*
1126 * Check packet status. If good, process it.
1127 * If not, silently drop it and put it back on the
1128 * receive ring.
1129 */
1130
1131 if (likely (!(dsc->dscr_a & M_DMA_ETHRX_BAD))) {
1132
1133 /*
1134 * Add a new buffer to replace the old one. If we fail
1135 * to allocate a buffer, we're going to drop this
1136 * packet and put it right back on the receive ring.
1137 */
1138
1139 if (unlikely(sbdma_add_rcvbuffer(sc, d, NULL) ==
1140 -ENOBUFS)) {
1141 dev->stats.rx_dropped++;
1142 /* Re-add old buffer */
1143 sbdma_add_rcvbuffer(sc, d, sb);
1144 /* No point in continuing at the moment */
1145 printk(KERN_ERR "dropped packet (1)\n");
1146 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1147 goto done;
1148 } else {
1149 /*
1150 * Set length into the packet
1151 */
1152 skb_put(sb,len);
1153
1154 /*
1155 * Buffer has been replaced on the
1156 * receive ring. Pass the buffer to
1157 * the kernel
1158 */
1159 sb->protocol = eth_type_trans(sb,d->sbdma_eth->sbm_dev);
1160 /* Check hw IPv4/TCP checksum if supported */
1161 if (sc->rx_hw_checksum == ENABLE) {
1162 if (!((dsc->dscr_a) & M_DMA_ETHRX_BADIP4CS) &&
1163 !((dsc->dscr_a) & M_DMA_ETHRX_BADTCPCS)) {
1164 sb->ip_summed = CHECKSUM_UNNECESSARY;
1165 /* don't need to set sb->csum */
1166 } else {
1167 skb_checksum_none_assert(sb);
1168 }
1169 }
1170 prefetch(sb->data);
1171 prefetch((const void *)(((char *)sb->data)+32));
1172 if (poll)
1173 dropped = netif_receive_skb(sb);
1174 else
1175 dropped = netif_rx(sb);
1176
1177 if (dropped == NET_RX_DROP) {
1178 dev->stats.rx_dropped++;
1179 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1180 goto done;
1181 }
1182 else {
1183 dev->stats.rx_bytes += len;
1184 dev->stats.rx_packets++;
1185 }
1186 }
1187 } else {
1188 /*
1189 * Packet was mangled somehow. Just drop it and
1190 * put it back on the receive ring.
1191 */
1192 dev->stats.rx_errors++;
1193 sbdma_add_rcvbuffer(sc, d, sb);
1194 }
1195
1196
1197 /*
1198 * .. and advance to the next buffer.
1199 */
1200
1201 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1202 work_done++;
1203 }
1204 if (!poll) {
1205 work_to_do = 32;
1206 goto again; /* collect fifo drop statistics again */
1207 }
1208 done:
1209 return work_done;
1210 }
1211
1212 /**********************************************************************
1213 * SBDMA_TX_PROCESS(sc,d)
1214 *
1215 * Process "completed" transmit buffers on the specified DMA channel.
1216 * This is normally called within the interrupt service routine.
1217 * Note that this isn't really ideal for priority channels, since
1218 * it processes all of the packets on a given channel before
1219 * returning.
1220 *
1221 * Input parameters:
1222 * sc - softc structure
1223 * d - DMA channel context
1224 * poll - 1: using polling (for NAPI)
1225 *
1226 * Return value:
1227 * nothing
1228 ********************************************************************* */
1229
1230 static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d,
1231 int poll)
1232 {
1233 struct net_device *dev = sc->sbm_dev;
1234 int curidx;
1235 int hwidx;
1236 struct sbdmadscr *dsc;
1237 struct sk_buff *sb;
1238 unsigned long flags;
1239 int packets_handled = 0;
1240
1241 spin_lock_irqsave(&(sc->sbm_lock), flags);
1242
1243 if (d->sbdma_remptr == d->sbdma_addptr)
1244 goto end_unlock;
1245
1246 hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
1247 d->sbdma_dscrtable_phys) / sizeof(*d->sbdma_dscrtable);
1248
1249 for (;;) {
1250 /*
1251 * figure out where we are (as an index) and where
1252 * the hardware is (also as an index)
1253 *
1254 * This could be done faster if (for example) the
1255 * descriptor table was page-aligned and contiguous in
1256 * both virtual and physical memory -- you could then
1257 * just compare the low-order bits of the virtual address
1258 * (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
1259 */
1260
1261 curidx = d->sbdma_remptr - d->sbdma_dscrtable;
1262
1263 /*
1264 * If they're the same, that means we've processed all
1265 * of the descriptors up to (but not including) the one that
1266 * the hardware is working on right now.
1267 */
1268
1269 if (curidx == hwidx)
1270 break;
1271
1272 /*
1273 * Otherwise, get the packet's sk_buff ptr back
1274 */
1275
1276 dsc = &(d->sbdma_dscrtable[curidx]);
1277 sb = d->sbdma_ctxtable[curidx];
1278 d->sbdma_ctxtable[curidx] = NULL;
1279
1280 /*
1281 * Stats
1282 */
1283
1284 dev->stats.tx_bytes += sb->len;
1285 dev->stats.tx_packets++;
1286
1287 /*
1288 * for transmits, we just free buffers.
1289 */
1290
1291 dev_kfree_skb_irq(sb);
1292
1293 /*
1294 * .. and advance to the next buffer.
1295 */
1296
1297 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1298
1299 packets_handled++;
1300
1301 }
1302
1303 /*
1304 * Decide if we should wake up the protocol or not.
1305 * Other drivers seem to do this when we reach a low
1306 * watermark on the transmit queue.
1307 */
1308
1309 if (packets_handled)
1310 netif_wake_queue(d->sbdma_eth->sbm_dev);
1311
1312 end_unlock:
1313 spin_unlock_irqrestore(&(sc->sbm_lock), flags);
1314
1315 }
1316
1317
1318
1319 /**********************************************************************
1320 * SBMAC_INITCTX(s)
1321 *
1322 * Initialize an Ethernet context structure - this is called
1323 * once per MAC on the 1250. Memory is allocated here, so don't
1324 * call it again from inside the ioctl routines that bring the
1325 * interface up/down
1326 *
1327 * Input parameters:
1328 * s - sbmac context structure
1329 *
1330 * Return value:
1331 * 0
1332 ********************************************************************* */
1333
1334 static int sbmac_initctx(struct sbmac_softc *s)
1335 {
1336
1337 /*
1338 * figure out the addresses of some ports
1339 */
1340
1341 s->sbm_macenable = s->sbm_base + R_MAC_ENABLE;
1342 s->sbm_maccfg = s->sbm_base + R_MAC_CFG;
1343 s->sbm_fifocfg = s->sbm_base + R_MAC_THRSH_CFG;
1344 s->sbm_framecfg = s->sbm_base + R_MAC_FRAMECFG;
1345 s->sbm_rxfilter = s->sbm_base + R_MAC_ADFILTER_CFG;
1346 s->sbm_isr = s->sbm_base + R_MAC_STATUS;
1347 s->sbm_imr = s->sbm_base + R_MAC_INT_MASK;
1348 s->sbm_mdio = s->sbm_base + R_MAC_MDIO;
1349
1350 /*
1351 * Initialize the DMA channels. Right now, only one per MAC is used
1352 * Note: Only do this _once_, as it allocates memory from the kernel!
1353 */
1354
1355 sbdma_initctx(&(s->sbm_txdma),s,0,DMA_TX,SBMAC_MAX_TXDESCR);
1356 sbdma_initctx(&(s->sbm_rxdma),s,0,DMA_RX,SBMAC_MAX_RXDESCR);
1357
1358 /*
1359 * initial state is OFF
1360 */
1361
1362 s->sbm_state = sbmac_state_off;
1363
1364 return 0;
1365 }
1366
1367
1368 static void sbdma_uninitctx(struct sbmacdma *d)
1369 {
1370 kfree(d->sbdma_dscrtable_unaligned);
1371 d->sbdma_dscrtable_unaligned = d->sbdma_dscrtable = NULL;
1372
1373 kfree(d->sbdma_ctxtable);
1374 d->sbdma_ctxtable = NULL;
1375 }
1376
1377
1378 static void sbmac_uninitctx(struct sbmac_softc *sc)
1379 {
1380 sbdma_uninitctx(&(sc->sbm_txdma));
1381 sbdma_uninitctx(&(sc->sbm_rxdma));
1382 }
1383
1384
1385 /**********************************************************************
1386 * SBMAC_CHANNEL_START(s)
1387 *
1388 * Start packet processing on this MAC.
1389 *
1390 * Input parameters:
1391 * s - sbmac structure
1392 *
1393 * Return value:
1394 * nothing
1395 ********************************************************************* */
1396
1397 static void sbmac_channel_start(struct sbmac_softc *s)
1398 {
1399 uint64_t reg;
1400 void __iomem *port;
1401 uint64_t cfg,fifo,framecfg;
1402 int idx, th_value;
1403
1404 /*
1405 * Don't do this if running
1406 */
1407
1408 if (s->sbm_state == sbmac_state_on)
1409 return;
1410
1411 /*
1412 * Bring the controller out of reset, but leave it off.
1413 */
1414
1415 __raw_writeq(0, s->sbm_macenable);
1416
1417 /*
1418 * Ignore all received packets
1419 */
1420
1421 __raw_writeq(0, s->sbm_rxfilter);
1422
1423 /*
1424 * Calculate values for various control registers.
1425 */
1426
1427 cfg = M_MAC_RETRY_EN |
1428 M_MAC_TX_HOLD_SOP_EN |
1429 V_MAC_TX_PAUSE_CNT_16K |
1430 M_MAC_AP_STAT_EN |
1431 M_MAC_FAST_SYNC |
1432 M_MAC_SS_EN |
1433 0;
1434
1435 /*
1436 * Be sure that RD_THRSH+WR_THRSH <= 32 for pass1 pars
1437 * and make sure that RD_THRSH + WR_THRSH <=128 for pass2 and above
1438 * Use a larger RD_THRSH for gigabit
1439 */
1440 if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2)
1441 th_value = 28;
1442 else
1443 th_value = 64;
1444
1445 fifo = V_MAC_TX_WR_THRSH(4) | /* Must be '4' or '8' */
1446 ((s->sbm_speed == sbmac_speed_1000)
1447 ? V_MAC_TX_RD_THRSH(th_value) : V_MAC_TX_RD_THRSH(4)) |
1448 V_MAC_TX_RL_THRSH(4) |
1449 V_MAC_RX_PL_THRSH(4) |
1450 V_MAC_RX_RD_THRSH(4) | /* Must be '4' */
1451 V_MAC_RX_RL_THRSH(8) |
1452 0;
1453
1454 framecfg = V_MAC_MIN_FRAMESZ_DEFAULT |
1455 V_MAC_MAX_FRAMESZ_DEFAULT |
1456 V_MAC_BACKOFF_SEL(1);
1457
1458 /*
1459 * Clear out the hash address map
1460 */
1461
1462 port = s->sbm_base + R_MAC_HASH_BASE;
1463 for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
1464 __raw_writeq(0, port);
1465 port += sizeof(uint64_t);
1466 }
1467
1468 /*
1469 * Clear out the exact-match table
1470 */
1471
1472 port = s->sbm_base + R_MAC_ADDR_BASE;
1473 for (idx = 0; idx < MAC_ADDR_COUNT; idx++) {
1474 __raw_writeq(0, port);
1475 port += sizeof(uint64_t);
1476 }
1477
1478 /*
1479 * Clear out the DMA Channel mapping table registers
1480 */
1481
1482 port = s->sbm_base + R_MAC_CHUP0_BASE;
1483 for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
1484 __raw_writeq(0, port);
1485 port += sizeof(uint64_t);
1486 }
1487
1488
1489 port = s->sbm_base + R_MAC_CHLO0_BASE;
1490 for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
1491 __raw_writeq(0, port);
1492 port += sizeof(uint64_t);
1493 }
1494
1495 /*
1496 * Program the hardware address. It goes into the hardware-address
1497 * register as well as the first filter register.
1498 */
1499
1500 reg = sbmac_addr2reg(s->sbm_hwaddr);
1501
1502 port = s->sbm_base + R_MAC_ADDR_BASE;
1503 __raw_writeq(reg, port);
1504 port = s->sbm_base + R_MAC_ETHERNET_ADDR;
1505
1506 __raw_writeq(reg, port);
1507
1508 /*
1509 * Set the receive filter for no packets, and write values
1510 * to the various config registers
1511 */
1512
1513 __raw_writeq(0, s->sbm_rxfilter);
1514 __raw_writeq(0, s->sbm_imr);
1515 __raw_writeq(framecfg, s->sbm_framecfg);
1516 __raw_writeq(fifo, s->sbm_fifocfg);
1517 __raw_writeq(cfg, s->sbm_maccfg);
1518
1519 /*
1520 * Initialize DMA channels (rings should be ok now)
1521 */
1522
1523 sbdma_channel_start(&(s->sbm_rxdma), DMA_RX);
1524 sbdma_channel_start(&(s->sbm_txdma), DMA_TX);
1525
1526 /*
1527 * Configure the speed, duplex, and flow control
1528 */
1529
1530 sbmac_set_speed(s,s->sbm_speed);
1531 sbmac_set_duplex(s,s->sbm_duplex,s->sbm_fc);
1532
1533 /*
1534 * Fill the receive ring
1535 */
1536
1537 sbdma_fillring(s, &(s->sbm_rxdma));
1538
1539 /*
1540 * Turn on the rest of the bits in the enable register
1541 */
1542
1543 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
1544 __raw_writeq(M_MAC_RXDMA_EN0 |
1545 M_MAC_TXDMA_EN0, s->sbm_macenable);
1546 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
1547 __raw_writeq(M_MAC_RXDMA_EN0 |
1548 M_MAC_TXDMA_EN0 |
1549 M_MAC_RX_ENABLE |
1550 M_MAC_TX_ENABLE, s->sbm_macenable);
1551 #else
1552 #error invalid SiByte MAC configuration
1553 #endif
1554
1555 #ifdef CONFIG_SBMAC_COALESCE
1556 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
1557 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0), s->sbm_imr);
1558 #else
1559 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
1560 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), s->sbm_imr);
1561 #endif
1562
1563 /*
1564 * Enable receiving unicasts and broadcasts
1565 */
1566
1567 __raw_writeq(M_MAC_UCAST_EN | M_MAC_BCAST_EN, s->sbm_rxfilter);
1568
1569 /*
1570 * we're running now.
1571 */
1572
1573 s->sbm_state = sbmac_state_on;
1574
1575 /*
1576 * Program multicast addresses
1577 */
1578
1579 sbmac_setmulti(s);
1580
1581 /*
1582 * If channel was in promiscuous mode before, turn that on
1583 */
1584
1585 if (s->sbm_devflags & IFF_PROMISC) {
1586 sbmac_promiscuous_mode(s,1);
1587 }
1588
1589 }
1590
1591
1592 /**********************************************************************
1593 * SBMAC_CHANNEL_STOP(s)
1594 *
1595 * Stop packet processing on this MAC.
1596 *
1597 * Input parameters:
1598 * s - sbmac structure
1599 *
1600 * Return value:
1601 * nothing
1602 ********************************************************************* */
1603
1604 static void sbmac_channel_stop(struct sbmac_softc *s)
1605 {
1606 /* don't do this if already stopped */
1607
1608 if (s->sbm_state == sbmac_state_off)
1609 return;
1610
1611 /* don't accept any packets, disable all interrupts */
1612
1613 __raw_writeq(0, s->sbm_rxfilter);
1614 __raw_writeq(0, s->sbm_imr);
1615
1616 /* Turn off ticker */
1617
1618 /* XXX */
1619
1620 /* turn off receiver and transmitter */
1621
1622 __raw_writeq(0, s->sbm_macenable);
1623
1624 /* We're stopped now. */
1625
1626 s->sbm_state = sbmac_state_off;
1627
1628 /*
1629 * Stop DMA channels (rings should be ok now)
1630 */
1631
1632 sbdma_channel_stop(&(s->sbm_rxdma));
1633 sbdma_channel_stop(&(s->sbm_txdma));
1634
1635 /* Empty the receive and transmit rings */
1636
1637 sbdma_emptyring(&(s->sbm_rxdma));
1638 sbdma_emptyring(&(s->sbm_txdma));
1639
1640 }
1641
1642 /**********************************************************************
1643 * SBMAC_SET_CHANNEL_STATE(state)
1644 *
1645 * Set the channel's state ON or OFF
1646 *
1647 * Input parameters:
1648 * state - new state
1649 *
1650 * Return value:
1651 * old state
1652 ********************************************************************* */
1653 static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *sc,
1654 enum sbmac_state state)
1655 {
1656 enum sbmac_state oldstate = sc->sbm_state;
1657
1658 /*
1659 * If same as previous state, return
1660 */
1661
1662 if (state == oldstate) {
1663 return oldstate;
1664 }
1665
1666 /*
1667 * If new state is ON, turn channel on
1668 */
1669
1670 if (state == sbmac_state_on) {
1671 sbmac_channel_start(sc);
1672 }
1673 else {
1674 sbmac_channel_stop(sc);
1675 }
1676
1677 /*
1678 * Return previous state
1679 */
1680
1681 return oldstate;
1682 }
1683
1684
1685 /**********************************************************************
1686 * SBMAC_PROMISCUOUS_MODE(sc,onoff)
1687 *
1688 * Turn on or off promiscuous mode
1689 *
1690 * Input parameters:
1691 * sc - softc
1692 * onoff - 1 to turn on, 0 to turn off
1693 *
1694 * Return value:
1695 * nothing
1696 ********************************************************************* */
1697
1698 static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff)
1699 {
1700 uint64_t reg;
1701
1702 if (sc->sbm_state != sbmac_state_on)
1703 return;
1704
1705 if (onoff) {
1706 reg = __raw_readq(sc->sbm_rxfilter);
1707 reg |= M_MAC_ALLPKT_EN;
1708 __raw_writeq(reg, sc->sbm_rxfilter);
1709 }
1710 else {
1711 reg = __raw_readq(sc->sbm_rxfilter);
1712 reg &= ~M_MAC_ALLPKT_EN;
1713 __raw_writeq(reg, sc->sbm_rxfilter);
1714 }
1715 }
1716
1717 /**********************************************************************
1718 * SBMAC_SETIPHDR_OFFSET(sc,onoff)
1719 *
1720 * Set the iphdr offset as 15 assuming ethernet encapsulation
1721 *
1722 * Input parameters:
1723 * sc - softc
1724 *
1725 * Return value:
1726 * nothing
1727 ********************************************************************* */
1728
1729 static void sbmac_set_iphdr_offset(struct sbmac_softc *sc)
1730 {
1731 uint64_t reg;
1732
1733 /* Hard code the off set to 15 for now */
1734 reg = __raw_readq(sc->sbm_rxfilter);
1735 reg &= ~M_MAC_IPHDR_OFFSET | V_MAC_IPHDR_OFFSET(15);
1736 __raw_writeq(reg, sc->sbm_rxfilter);
1737
1738 /* BCM1250 pass1 didn't have hardware checksum. Everything
1739 later does. */
1740 if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2) {
1741 sc->rx_hw_checksum = DISABLE;
1742 } else {
1743 sc->rx_hw_checksum = ENABLE;
1744 }
1745 }
1746
1747
1748 /**********************************************************************
1749 * SBMAC_ADDR2REG(ptr)
1750 *
1751 * Convert six bytes into the 64-bit register value that
1752 * we typically write into the SBMAC's address/mcast registers
1753 *
1754 * Input parameters:
1755 * ptr - pointer to 6 bytes
1756 *
1757 * Return value:
1758 * register value
1759 ********************************************************************* */
1760
1761 static uint64_t sbmac_addr2reg(unsigned char *ptr)
1762 {
1763 uint64_t reg = 0;
1764
1765 ptr += 6;
1766
1767 reg |= (uint64_t) *(--ptr);
1768 reg <<= 8;
1769 reg |= (uint64_t) *(--ptr);
1770 reg <<= 8;
1771 reg |= (uint64_t) *(--ptr);
1772 reg <<= 8;
1773 reg |= (uint64_t) *(--ptr);
1774 reg <<= 8;
1775 reg |= (uint64_t) *(--ptr);
1776 reg <<= 8;
1777 reg |= (uint64_t) *(--ptr);
1778
1779 return reg;
1780 }
1781
1782
1783 /**********************************************************************
1784 * SBMAC_SET_SPEED(s,speed)
1785 *
1786 * Configure LAN speed for the specified MAC.
1787 * Warning: must be called when MAC is off!
1788 *
1789 * Input parameters:
1790 * s - sbmac structure
1791 * speed - speed to set MAC to (see enum sbmac_speed)
1792 *
1793 * Return value:
1794 * 1 if successful
1795 * 0 indicates invalid parameters
1796 ********************************************************************* */
1797
1798 static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed)
1799 {
1800 uint64_t cfg;
1801 uint64_t framecfg;
1802
1803 /*
1804 * Save new current values
1805 */
1806
1807 s->sbm_speed = speed;
1808
1809 if (s->sbm_state == sbmac_state_on)
1810 return 0; /* save for next restart */
1811
1812 /*
1813 * Read current register values
1814 */
1815
1816 cfg = __raw_readq(s->sbm_maccfg);
1817 framecfg = __raw_readq(s->sbm_framecfg);
1818
1819 /*
1820 * Mask out the stuff we want to change
1821 */
1822
1823 cfg &= ~(M_MAC_BURST_EN | M_MAC_SPEED_SEL);
1824 framecfg &= ~(M_MAC_IFG_RX | M_MAC_IFG_TX | M_MAC_IFG_THRSH |
1825 M_MAC_SLOT_SIZE);
1826
1827 /*
1828 * Now add in the new bits
1829 */
1830
1831 switch (speed) {
1832 case sbmac_speed_10:
1833 framecfg |= V_MAC_IFG_RX_10 |
1834 V_MAC_IFG_TX_10 |
1835 K_MAC_IFG_THRSH_10 |
1836 V_MAC_SLOT_SIZE_10;
1837 cfg |= V_MAC_SPEED_SEL_10MBPS;
1838 break;
1839
1840 case sbmac_speed_100:
1841 framecfg |= V_MAC_IFG_RX_100 |
1842 V_MAC_IFG_TX_100 |
1843 V_MAC_IFG_THRSH_100 |
1844 V_MAC_SLOT_SIZE_100;
1845 cfg |= V_MAC_SPEED_SEL_100MBPS ;
1846 break;
1847
1848 case sbmac_speed_1000:
1849 framecfg |= V_MAC_IFG_RX_1000 |
1850 V_MAC_IFG_TX_1000 |
1851 V_MAC_IFG_THRSH_1000 |
1852 V_MAC_SLOT_SIZE_1000;
1853 cfg |= V_MAC_SPEED_SEL_1000MBPS | M_MAC_BURST_EN;
1854 break;
1855
1856 default:
1857 return 0;
1858 }
1859
1860 /*
1861 * Send the bits back to the hardware
1862 */
1863
1864 __raw_writeq(framecfg, s->sbm_framecfg);
1865 __raw_writeq(cfg, s->sbm_maccfg);
1866
1867 return 1;
1868 }
1869
1870 /**********************************************************************
1871 * SBMAC_SET_DUPLEX(s,duplex,fc)
1872 *
1873 * Set Ethernet duplex and flow control options for this MAC
1874 * Warning: must be called when MAC is off!
1875 *
1876 * Input parameters:
1877 * s - sbmac structure
1878 * duplex - duplex setting (see enum sbmac_duplex)
1879 * fc - flow control setting (see enum sbmac_fc)
1880 *
1881 * Return value:
1882 * 1 if ok
1883 * 0 if an invalid parameter combination was specified
1884 ********************************************************************* */
1885
1886 static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex,
1887 enum sbmac_fc fc)
1888 {
1889 uint64_t cfg;
1890
1891 /*
1892 * Save new current values
1893 */
1894
1895 s->sbm_duplex = duplex;
1896 s->sbm_fc = fc;
1897
1898 if (s->sbm_state == sbmac_state_on)
1899 return 0; /* save for next restart */
1900
1901 /*
1902 * Read current register values
1903 */
1904
1905 cfg = __raw_readq(s->sbm_maccfg);
1906
1907 /*
1908 * Mask off the stuff we're about to change
1909 */
1910
1911 cfg &= ~(M_MAC_FC_SEL | M_MAC_FC_CMD | M_MAC_HDX_EN);
1912
1913
1914 switch (duplex) {
1915 case sbmac_duplex_half:
1916 switch (fc) {
1917 case sbmac_fc_disabled:
1918 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_DISABLED;
1919 break;
1920
1921 case sbmac_fc_collision:
1922 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENABLED;
1923 break;
1924
1925 case sbmac_fc_carrier:
1926 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENAB_FALSECARR;
1927 break;
1928
1929 case sbmac_fc_frame: /* not valid in half duplex */
1930 default: /* invalid selection */
1931 return 0;
1932 }
1933 break;
1934
1935 case sbmac_duplex_full:
1936 switch (fc) {
1937 case sbmac_fc_disabled:
1938 cfg |= V_MAC_FC_CMD_DISABLED;
1939 break;
1940
1941 case sbmac_fc_frame:
1942 cfg |= V_MAC_FC_CMD_ENABLED;
1943 break;
1944
1945 case sbmac_fc_collision: /* not valid in full duplex */
1946 case sbmac_fc_carrier: /* not valid in full duplex */
1947 default:
1948 return 0;
1949 }
1950 break;
1951 default:
1952 return 0;
1953 }
1954
1955 /*
1956 * Send the bits back to the hardware
1957 */
1958
1959 __raw_writeq(cfg, s->sbm_maccfg);
1960
1961 return 1;
1962 }
1963
1964
1965
1966
1967 /**********************************************************************
1968 * SBMAC_INTR()
1969 *
1970 * Interrupt handler for MAC interrupts
1971 *
1972 * Input parameters:
1973 * MAC structure
1974 *
1975 * Return value:
1976 * nothing
1977 ********************************************************************* */
1978 static irqreturn_t sbmac_intr(int irq,void *dev_instance)
1979 {
1980 struct net_device *dev = (struct net_device *) dev_instance;
1981 struct sbmac_softc *sc = netdev_priv(dev);
1982 uint64_t isr;
1983 int handled = 0;
1984
1985 /*
1986 * Read the ISR (this clears the bits in the real
1987 * register, except for counter addr)
1988 */
1989
1990 isr = __raw_readq(sc->sbm_isr) & ~M_MAC_COUNTER_ADDR;
1991
1992 if (isr == 0)
1993 return IRQ_RETVAL(0);
1994 handled = 1;
1995
1996 /*
1997 * Transmits on channel 0
1998 */
1999
2000 if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0))
2001 sbdma_tx_process(sc,&(sc->sbm_txdma), 0);
2002
2003 if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) {
2004 if (napi_schedule_prep(&sc->napi)) {
2005 __raw_writeq(0, sc->sbm_imr);
2006 __napi_schedule(&sc->napi);
2007 /* Depend on the exit from poll to reenable intr */
2008 }
2009 else {
2010 /* may leave some packets behind */
2011 sbdma_rx_process(sc,&(sc->sbm_rxdma),
2012 SBMAC_MAX_RXDESCR * 2, 0);
2013 }
2014 }
2015 return IRQ_RETVAL(handled);
2016 }
2017
2018 /**********************************************************************
2019 * SBMAC_START_TX(skb,dev)
2020 *
2021 * Start output on the specified interface. Basically, we
2022 * queue as many buffers as we can until the ring fills up, or
2023 * we run off the end of the queue, whichever comes first.
2024 *
2025 * Input parameters:
2026 *
2027 *
2028 * Return value:
2029 * nothing
2030 ********************************************************************* */
2031 static netdev_tx_t sbmac_start_tx(struct sk_buff *skb, struct net_device *dev)
2032 {
2033 struct sbmac_softc *sc = netdev_priv(dev);
2034 unsigned long flags;
2035
2036 /* lock eth irq */
2037 spin_lock_irqsave(&sc->sbm_lock, flags);
2038
2039 /*
2040 * Put the buffer on the transmit ring. If we
2041 * don't have room, stop the queue.
2042 */
2043
2044 if (sbdma_add_txbuffer(&(sc->sbm_txdma),skb)) {
2045 /* XXX save skb that we could not send */
2046 netif_stop_queue(dev);
2047 spin_unlock_irqrestore(&sc->sbm_lock, flags);
2048
2049 return NETDEV_TX_BUSY;
2050 }
2051
2052 spin_unlock_irqrestore(&sc->sbm_lock, flags);
2053
2054 return NETDEV_TX_OK;
2055 }
2056
2057 /**********************************************************************
2058 * SBMAC_SETMULTI(sc)
2059 *
2060 * Reprogram the multicast table into the hardware, given
2061 * the list of multicasts associated with the interface
2062 * structure.
2063 *
2064 * Input parameters:
2065 * sc - softc
2066 *
2067 * Return value:
2068 * nothing
2069 ********************************************************************* */
2070
2071 static void sbmac_setmulti(struct sbmac_softc *sc)
2072 {
2073 uint64_t reg;
2074 void __iomem *port;
2075 int idx;
2076 struct netdev_hw_addr *ha;
2077 struct net_device *dev = sc->sbm_dev;
2078
2079 /*
2080 * Clear out entire multicast table. We do this by nuking
2081 * the entire hash table and all the direct matches except
2082 * the first one, which is used for our station address
2083 */
2084
2085 for (idx = 1; idx < MAC_ADDR_COUNT; idx++) {
2086 port = sc->sbm_base + R_MAC_ADDR_BASE+(idx*sizeof(uint64_t));
2087 __raw_writeq(0, port);
2088 }
2089
2090 for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
2091 port = sc->sbm_base + R_MAC_HASH_BASE+(idx*sizeof(uint64_t));
2092 __raw_writeq(0, port);
2093 }
2094
2095 /*
2096 * Clear the filter to say we don't want any multicasts.
2097 */
2098
2099 reg = __raw_readq(sc->sbm_rxfilter);
2100 reg &= ~(M_MAC_MCAST_INV | M_MAC_MCAST_EN);
2101 __raw_writeq(reg, sc->sbm_rxfilter);
2102
2103 if (dev->flags & IFF_ALLMULTI) {
2104 /*
2105 * Enable ALL multicasts. Do this by inverting the
2106 * multicast enable bit.
2107 */
2108 reg = __raw_readq(sc->sbm_rxfilter);
2109 reg |= (M_MAC_MCAST_INV | M_MAC_MCAST_EN);
2110 __raw_writeq(reg, sc->sbm_rxfilter);
2111 return;
2112 }
2113
2114
2115 /*
2116 * Progam new multicast entries. For now, only use the
2117 * perfect filter. In the future we'll need to use the
2118 * hash filter if the perfect filter overflows
2119 */
2120
2121 /* XXX only using perfect filter for now, need to use hash
2122 * XXX if the table overflows */
2123
2124 idx = 1; /* skip station address */
2125 netdev_for_each_mc_addr(ha, dev) {
2126 if (idx == MAC_ADDR_COUNT)
2127 break;
2128 reg = sbmac_addr2reg(ha->addr);
2129 port = sc->sbm_base + R_MAC_ADDR_BASE+(idx * sizeof(uint64_t));
2130 __raw_writeq(reg, port);
2131 idx++;
2132 }
2133
2134 /*
2135 * Enable the "accept multicast bits" if we programmed at least one
2136 * multicast.
2137 */
2138
2139 if (idx > 1) {
2140 reg = __raw_readq(sc->sbm_rxfilter);
2141 reg |= M_MAC_MCAST_EN;
2142 __raw_writeq(reg, sc->sbm_rxfilter);
2143 }
2144 }
2145
2146 static const struct net_device_ops sbmac_netdev_ops = {
2147 .ndo_open = sbmac_open,
2148 .ndo_stop = sbmac_close,
2149 .ndo_start_xmit = sbmac_start_tx,
2150 .ndo_set_rx_mode = sbmac_set_rx_mode,
2151 .ndo_tx_timeout = sbmac_tx_timeout,
2152 .ndo_do_ioctl = sbmac_mii_ioctl,
2153 .ndo_validate_addr = eth_validate_addr,
2154 .ndo_set_mac_address = eth_mac_addr,
2155 #ifdef CONFIG_NET_POLL_CONTROLLER
2156 .ndo_poll_controller = sbmac_netpoll,
2157 #endif
2158 };
2159
2160 /**********************************************************************
2161 * SBMAC_INIT(dev)
2162 *
2163 * Attach routine - init hardware and hook ourselves into linux
2164 *
2165 * Input parameters:
2166 * dev - net_device structure
2167 *
2168 * Return value:
2169 * status
2170 ********************************************************************* */
2171
2172 static int sbmac_init(struct platform_device *pldev, long long base)
2173 {
2174 struct net_device *dev = platform_get_drvdata(pldev);
2175 int idx = pldev->id;
2176 struct sbmac_softc *sc = netdev_priv(dev);
2177 unsigned char *eaddr;
2178 uint64_t ea_reg;
2179 int i;
2180 int err;
2181
2182 sc->sbm_dev = dev;
2183 sc->sbe_idx = idx;
2184
2185 eaddr = sc->sbm_hwaddr;
2186
2187 /*
2188 * Read the ethernet address. The firmware left this programmed
2189 * for us in the ethernet address register for each mac.
2190 */
2191
2192 ea_reg = __raw_readq(sc->sbm_base + R_MAC_ETHERNET_ADDR);
2193 __raw_writeq(0, sc->sbm_base + R_MAC_ETHERNET_ADDR);
2194 for (i = 0; i < 6; i++) {
2195 eaddr[i] = (uint8_t) (ea_reg & 0xFF);
2196 ea_reg >>= 8;
2197 }
2198
2199 for (i = 0; i < 6; i++) {
2200 dev->dev_addr[i] = eaddr[i];
2201 }
2202
2203 /*
2204 * Initialize context (get pointers to registers and stuff), then
2205 * allocate the memory for the descriptor tables.
2206 */
2207
2208 sbmac_initctx(sc);
2209
2210 /*
2211 * Set up Linux device callins
2212 */
2213
2214 spin_lock_init(&(sc->sbm_lock));
2215
2216 dev->netdev_ops = &sbmac_netdev_ops;
2217 dev->watchdog_timeo = TX_TIMEOUT;
2218 dev->min_mtu = 0;
2219 dev->max_mtu = ENET_PACKET_SIZE;
2220
2221 netif_napi_add(dev, &sc->napi, sbmac_poll, 16);
2222
2223 dev->irq = UNIT_INT(idx);
2224
2225 /* This is needed for PASS2 for Rx H/W checksum feature */
2226 sbmac_set_iphdr_offset(sc);
2227
2228 sc->mii_bus = mdiobus_alloc();
2229 if (sc->mii_bus == NULL) {
2230 err = -ENOMEM;
2231 goto uninit_ctx;
2232 }
2233
2234 sc->mii_bus->name = sbmac_mdio_string;
2235 snprintf(sc->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
2236 pldev->name, idx);
2237 sc->mii_bus->priv = sc;
2238 sc->mii_bus->read = sbmac_mii_read;
2239 sc->mii_bus->write = sbmac_mii_write;
2240
2241 sc->mii_bus->parent = &pldev->dev;
2242 /*
2243 * Probe PHY address
2244 */
2245 err = mdiobus_register(sc->mii_bus);
2246 if (err) {
2247 printk(KERN_ERR "%s: unable to register MDIO bus\n",
2248 dev->name);
2249 goto free_mdio;
2250 }
2251 platform_set_drvdata(pldev, sc->mii_bus);
2252
2253 err = register_netdev(dev);
2254 if (err) {
2255 printk(KERN_ERR "%s.%d: unable to register netdev\n",
2256 sbmac_string, idx);
2257 goto unreg_mdio;
2258 }
2259
2260 pr_info("%s.%d: registered as %s\n", sbmac_string, idx, dev->name);
2261
2262 if (sc->rx_hw_checksum == ENABLE)
2263 pr_info("%s: enabling TCP rcv checksum\n", dev->name);
2264
2265 /*
2266 * Display Ethernet address (this is called during the config
2267 * process so we need to finish off the config message that
2268 * was being displayed)
2269 */
2270 pr_info("%s: SiByte Ethernet at 0x%08Lx, address: %pM\n",
2271 dev->name, base, eaddr);
2272
2273 return 0;
2274 unreg_mdio:
2275 mdiobus_unregister(sc->mii_bus);
2276 free_mdio:
2277 mdiobus_free(sc->mii_bus);
2278 uninit_ctx:
2279 sbmac_uninitctx(sc);
2280 return err;
2281 }
2282
2283
2284 static int sbmac_open(struct net_device *dev)
2285 {
2286 struct sbmac_softc *sc = netdev_priv(dev);
2287 int err;
2288
2289 if (debug > 1)
2290 pr_debug("%s: sbmac_open() irq %d.\n", dev->name, dev->irq);
2291
2292 /*
2293 * map/route interrupt (clear status first, in case something
2294 * weird is pending; we haven't initialized the mac registers
2295 * yet)
2296 */
2297
2298 __raw_readq(sc->sbm_isr);
2299 err = request_irq(dev->irq, sbmac_intr, IRQF_SHARED, dev->name, dev);
2300 if (err) {
2301 printk(KERN_ERR "%s: unable to get IRQ %d\n", dev->name,
2302 dev->irq);
2303 goto out_err;
2304 }
2305
2306 sc->sbm_speed = sbmac_speed_none;
2307 sc->sbm_duplex = sbmac_duplex_none;
2308 sc->sbm_fc = sbmac_fc_none;
2309 sc->sbm_pause = -1;
2310 sc->sbm_link = 0;
2311
2312 /*
2313 * Attach to the PHY
2314 */
2315 err = sbmac_mii_probe(dev);
2316 if (err)
2317 goto out_unregister;
2318
2319 /*
2320 * Turn on the channel
2321 */
2322
2323 sbmac_set_channel_state(sc,sbmac_state_on);
2324
2325 netif_start_queue(dev);
2326
2327 sbmac_set_rx_mode(dev);
2328
2329 phy_start(sc->phy_dev);
2330
2331 napi_enable(&sc->napi);
2332
2333 return 0;
2334
2335 out_unregister:
2336 free_irq(dev->irq, dev);
2337 out_err:
2338 return err;
2339 }
2340
2341 static int sbmac_mii_probe(struct net_device *dev)
2342 {
2343 struct sbmac_softc *sc = netdev_priv(dev);
2344 struct phy_device *phy_dev;
2345
2346 phy_dev = phy_find_first(sc->mii_bus);
2347 if (!phy_dev) {
2348 printk(KERN_ERR "%s: no PHY found\n", dev->name);
2349 return -ENXIO;
2350 }
2351
2352 phy_dev = phy_connect(dev, dev_name(&phy_dev->mdio.dev),
2353 &sbmac_mii_poll, PHY_INTERFACE_MODE_GMII);
2354 if (IS_ERR(phy_dev)) {
2355 printk(KERN_ERR "%s: could not attach to PHY\n", dev->name);
2356 return PTR_ERR(phy_dev);
2357 }
2358
2359 /* Remove any features not supported by the controller */
2360 phy_dev->supported &= SUPPORTED_10baseT_Half |
2361 SUPPORTED_10baseT_Full |
2362 SUPPORTED_100baseT_Half |
2363 SUPPORTED_100baseT_Full |
2364 SUPPORTED_1000baseT_Half |
2365 SUPPORTED_1000baseT_Full |
2366 SUPPORTED_Autoneg |
2367 SUPPORTED_MII |
2368 SUPPORTED_Pause |
2369 SUPPORTED_Asym_Pause;
2370
2371 phy_attached_info(phy_dev);
2372
2373 phy_dev->advertising = phy_dev->supported;
2374
2375 sc->phy_dev = phy_dev;
2376
2377 return 0;
2378 }
2379
2380
2381 static void sbmac_mii_poll(struct net_device *dev)
2382 {
2383 struct sbmac_softc *sc = netdev_priv(dev);
2384 struct phy_device *phy_dev = sc->phy_dev;
2385 unsigned long flags;
2386 enum sbmac_fc fc;
2387 int link_chg, speed_chg, duplex_chg, pause_chg, fc_chg;
2388
2389 link_chg = (sc->sbm_link != phy_dev->link);
2390 speed_chg = (sc->sbm_speed != phy_dev->speed);
2391 duplex_chg = (sc->sbm_duplex != phy_dev->duplex);
2392 pause_chg = (sc->sbm_pause != phy_dev->pause);
2393
2394 if (!link_chg && !speed_chg && !duplex_chg && !pause_chg)
2395 return; /* Hmmm... */
2396
2397 if (!phy_dev->link) {
2398 if (link_chg) {
2399 sc->sbm_link = phy_dev->link;
2400 sc->sbm_speed = sbmac_speed_none;
2401 sc->sbm_duplex = sbmac_duplex_none;
2402 sc->sbm_fc = sbmac_fc_disabled;
2403 sc->sbm_pause = -1;
2404 pr_info("%s: link unavailable\n", dev->name);
2405 }
2406 return;
2407 }
2408
2409 if (phy_dev->duplex == DUPLEX_FULL) {
2410 if (phy_dev->pause)
2411 fc = sbmac_fc_frame;
2412 else
2413 fc = sbmac_fc_disabled;
2414 } else
2415 fc = sbmac_fc_collision;
2416 fc_chg = (sc->sbm_fc != fc);
2417
2418 pr_info("%s: link available: %dbase-%cD\n", dev->name, phy_dev->speed,
2419 phy_dev->duplex == DUPLEX_FULL ? 'F' : 'H');
2420
2421 spin_lock_irqsave(&sc->sbm_lock, flags);
2422
2423 sc->sbm_speed = phy_dev->speed;
2424 sc->sbm_duplex = phy_dev->duplex;
2425 sc->sbm_fc = fc;
2426 sc->sbm_pause = phy_dev->pause;
2427 sc->sbm_link = phy_dev->link;
2428
2429 if ((speed_chg || duplex_chg || fc_chg) &&
2430 sc->sbm_state != sbmac_state_off) {
2431 /*
2432 * something changed, restart the channel
2433 */
2434 if (debug > 1)
2435 pr_debug("%s: restarting channel "
2436 "because PHY state changed\n", dev->name);
2437 sbmac_channel_stop(sc);
2438 sbmac_channel_start(sc);
2439 }
2440
2441 spin_unlock_irqrestore(&sc->sbm_lock, flags);
2442 }
2443
2444
2445 static void sbmac_tx_timeout (struct net_device *dev)
2446 {
2447 struct sbmac_softc *sc = netdev_priv(dev);
2448 unsigned long flags;
2449
2450 spin_lock_irqsave(&sc->sbm_lock, flags);
2451
2452
2453 netif_trans_update(dev); /* prevent tx timeout */
2454 dev->stats.tx_errors++;
2455
2456 spin_unlock_irqrestore(&sc->sbm_lock, flags);
2457
2458 printk (KERN_WARNING "%s: Transmit timed out\n",dev->name);
2459 }
2460
2461
2462
2463
2464 static void sbmac_set_rx_mode(struct net_device *dev)
2465 {
2466 unsigned long flags;
2467 struct sbmac_softc *sc = netdev_priv(dev);
2468
2469 spin_lock_irqsave(&sc->sbm_lock, flags);
2470 if ((dev->flags ^ sc->sbm_devflags) & IFF_PROMISC) {
2471 /*
2472 * Promiscuous changed.
2473 */
2474
2475 if (dev->flags & IFF_PROMISC) {
2476 sbmac_promiscuous_mode(sc,1);
2477 }
2478 else {
2479 sbmac_promiscuous_mode(sc,0);
2480 }
2481 }
2482 spin_unlock_irqrestore(&sc->sbm_lock, flags);
2483
2484 /*
2485 * Program the multicasts. Do this every time.
2486 */
2487
2488 sbmac_setmulti(sc);
2489
2490 }
2491
2492 static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2493 {
2494 struct sbmac_softc *sc = netdev_priv(dev);
2495
2496 if (!netif_running(dev) || !sc->phy_dev)
2497 return -EINVAL;
2498
2499 return phy_mii_ioctl(sc->phy_dev, rq, cmd);
2500 }
2501
2502 static int sbmac_close(struct net_device *dev)
2503 {
2504 struct sbmac_softc *sc = netdev_priv(dev);
2505
2506 napi_disable(&sc->napi);
2507
2508 phy_stop(sc->phy_dev);
2509
2510 sbmac_set_channel_state(sc, sbmac_state_off);
2511
2512 netif_stop_queue(dev);
2513
2514 if (debug > 1)
2515 pr_debug("%s: Shutting down ethercard\n", dev->name);
2516
2517 phy_disconnect(sc->phy_dev);
2518 sc->phy_dev = NULL;
2519 free_irq(dev->irq, dev);
2520
2521 sbdma_emptyring(&(sc->sbm_txdma));
2522 sbdma_emptyring(&(sc->sbm_rxdma));
2523
2524 return 0;
2525 }
2526
2527 static int sbmac_poll(struct napi_struct *napi, int budget)
2528 {
2529 struct sbmac_softc *sc = container_of(napi, struct sbmac_softc, napi);
2530 int work_done;
2531
2532 work_done = sbdma_rx_process(sc, &(sc->sbm_rxdma), budget, 1);
2533 sbdma_tx_process(sc, &(sc->sbm_txdma), 1);
2534
2535 if (work_done < budget) {
2536 napi_complete_done(napi, work_done);
2537
2538 #ifdef CONFIG_SBMAC_COALESCE
2539 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
2540 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
2541 sc->sbm_imr);
2542 #else
2543 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
2544 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
2545 #endif
2546 }
2547
2548 return work_done;
2549 }
2550
2551
2552 static int sbmac_probe(struct platform_device *pldev)
2553 {
2554 struct net_device *dev;
2555 struct sbmac_softc *sc;
2556 void __iomem *sbm_base;
2557 struct resource *res;
2558 u64 sbmac_orig_hwaddr;
2559 int err;
2560
2561 res = platform_get_resource(pldev, IORESOURCE_MEM, 0);
2562 BUG_ON(!res);
2563 sbm_base = ioremap_nocache(res->start, resource_size(res));
2564 if (!sbm_base) {
2565 printk(KERN_ERR "%s: unable to map device registers\n",
2566 dev_name(&pldev->dev));
2567 err = -ENOMEM;
2568 goto out_out;
2569 }
2570
2571 /*
2572 * The R_MAC_ETHERNET_ADDR register will be set to some nonzero
2573 * value for us by the firmware if we're going to use this MAC.
2574 * If we find a zero, skip this MAC.
2575 */
2576 sbmac_orig_hwaddr = __raw_readq(sbm_base + R_MAC_ETHERNET_ADDR);
2577 pr_debug("%s: %sconfiguring MAC at 0x%08Lx\n", dev_name(&pldev->dev),
2578 sbmac_orig_hwaddr ? "" : "not ", (long long)res->start);
2579 if (sbmac_orig_hwaddr == 0) {
2580 err = 0;
2581 goto out_unmap;
2582 }
2583
2584 /*
2585 * Okay, cool. Initialize this MAC.
2586 */
2587 dev = alloc_etherdev(sizeof(struct sbmac_softc));
2588 if (!dev) {
2589 err = -ENOMEM;
2590 goto out_unmap;
2591 }
2592
2593 platform_set_drvdata(pldev, dev);
2594 SET_NETDEV_DEV(dev, &pldev->dev);
2595
2596 sc = netdev_priv(dev);
2597 sc->sbm_base = sbm_base;
2598
2599 err = sbmac_init(pldev, res->start);
2600 if (err)
2601 goto out_kfree;
2602
2603 return 0;
2604
2605 out_kfree:
2606 free_netdev(dev);
2607 __raw_writeq(sbmac_orig_hwaddr, sbm_base + R_MAC_ETHERNET_ADDR);
2608
2609 out_unmap:
2610 iounmap(sbm_base);
2611
2612 out_out:
2613 return err;
2614 }
2615
2616 static int sbmac_remove(struct platform_device *pldev)
2617 {
2618 struct net_device *dev = platform_get_drvdata(pldev);
2619 struct sbmac_softc *sc = netdev_priv(dev);
2620
2621 unregister_netdev(dev);
2622 sbmac_uninitctx(sc);
2623 mdiobus_unregister(sc->mii_bus);
2624 mdiobus_free(sc->mii_bus);
2625 iounmap(sc->sbm_base);
2626 free_netdev(dev);
2627
2628 return 0;
2629 }
2630
2631 static struct platform_driver sbmac_driver = {
2632 .probe = sbmac_probe,
2633 .remove = sbmac_remove,
2634 .driver = {
2635 .name = sbmac_string,
2636 },
2637 };
2638
2639 module_platform_driver(sbmac_driver);
2640 MODULE_LICENSE("GPL");
Linux with added FPC-III support