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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / net / chelsio / ixf1010.c
blob5b8f144e83d47f926b3164a5c71cd91a6fa1205b
1 /* $Date: 2005/11/12 02:13:49 $ $RCSfile: ixf1010.c,v $ $Revision: 1.36 $ */
2 #include "gmac.h"
3 #include "elmer0.h"
4
5 /* Update fast changing statistics every 15 seconds */
6 #define STATS_TICK_SECS 15
7 /* 30 minutes for full statistics update */
8 #define MAJOR_UPDATE_TICKS (1800 / STATS_TICK_SECS)
9
10 /*
11 * The IXF1010 can handle frames up to 16383 bytes but it's optimized for
12 * frames up to 9831 (0x2667) bytes, so we limit jumbo frame size to this.
13 * This length includes ethernet header and FCS.
14 */
15 #define MAX_FRAME_SIZE 0x2667
16
17 /* MAC registers */
18 enum {
19 /* Per-port registers */
20 REG_MACADDR_LOW = 0,
21 REG_MACADDR_HIGH = 0x4,
22 REG_FDFC_TYPE = 0xC,
23 REG_FC_TX_TIMER_VALUE = 0x1c,
24 REG_IPG_RX_TIME1 = 0x28,
25 REG_IPG_RX_TIME2 = 0x2c,
26 REG_IPG_TX_TIME = 0x30,
27 REG_PAUSE_THRES = 0x38,
28 REG_MAX_FRAME_SIZE = 0x3c,
29 REG_RGMII_SPEED = 0x40,
30 REG_FC_ENABLE = 0x48,
31 REG_DISCARD_CTRL_FRAMES = 0x54,
32 REG_DIVERSE_CONFIG = 0x60,
33 REG_RX_FILTER = 0x64,
34 REG_MC_ADDR_LOW = 0x68,
35 REG_MC_ADDR_HIGH = 0x6c,
36
37 REG_RX_OCTETS_OK = 0x80,
38 REG_RX_OCTETS_BAD = 0x84,
39 REG_RX_UC_PKTS = 0x88,
40 REG_RX_MC_PKTS = 0x8c,
41 REG_RX_BC_PKTS = 0x90,
42 REG_RX_FCS_ERR = 0xb0,
43 REG_RX_TAGGED = 0xb4,
44 REG_RX_DATA_ERR = 0xb8,
45 REG_RX_ALIGN_ERR = 0xbc,
46 REG_RX_LONG_ERR = 0xc0,
47 REG_RX_JABBER_ERR = 0xc4,
48 REG_RX_PAUSE_FRAMES = 0xc8,
49 REG_RX_UNKNOWN_CTRL_FRAMES = 0xcc,
50 REG_RX_VERY_LONG_ERR = 0xd0,
51 REG_RX_RUNT_ERR = 0xd4,
52 REG_RX_SHORT_ERR = 0xd8,
53 REG_RX_SYMBOL_ERR = 0xe4,
54
55 REG_TX_OCTETS_OK = 0x100,
56 REG_TX_OCTETS_BAD = 0x104,
57 REG_TX_UC_PKTS = 0x108,
58 REG_TX_MC_PKTS = 0x10c,
59 REG_TX_BC_PKTS = 0x110,
60 REG_TX_EXCESSIVE_LEN_DROP = 0x14c,
61 REG_TX_UNDERRUN = 0x150,
62 REG_TX_TAGGED = 0x154,
63 REG_TX_PAUSE_FRAMES = 0x15C,
64
65 /* Global registers */
66 REG_PORT_ENABLE = 0x1400,
67
68 REG_JTAG_ID = 0x1430,
69
70 RX_FIFO_HIGH_WATERMARK_BASE = 0x1600,
71 RX_FIFO_LOW_WATERMARK_BASE = 0x1628,
72 RX_FIFO_FRAMES_REMOVED_BASE = 0x1650,
73
74 REG_RX_ERR_DROP = 0x167c,
75 REG_RX_FIFO_OVERFLOW_EVENT = 0x1680,
76
77 TX_FIFO_HIGH_WATERMARK_BASE = 0x1800,
78 TX_FIFO_LOW_WATERMARK_BASE = 0x1828,
79 TX_FIFO_XFER_THRES_BASE = 0x1850,
80
81 REG_TX_FIFO_OVERFLOW_EVENT = 0x1878,
82 REG_TX_FIFO_OOS_EVENT = 0x1884,
83
84 TX_FIFO_FRAMES_REMOVED_BASE = 0x1888,
85
86 REG_SPI_RX_BURST = 0x1c00,
87 REG_SPI_RX_TRAINING = 0x1c04,
88 REG_SPI_RX_CALENDAR = 0x1c08,
89 REG_SPI_TX_SYNC = 0x1c0c
90 };
91
92 enum { /* RMON registers */
93 REG_RxOctetsTotalOK = 0x80,
94 REG_RxOctetsBad = 0x84,
95 REG_RxUCPkts = 0x88,
96 REG_RxMCPkts = 0x8c,
97 REG_RxBCPkts = 0x90,
98 REG_RxJumboPkts = 0xac,
99 REG_RxFCSErrors = 0xb0,
100 REG_RxDataErrors = 0xb8,
101 REG_RxAlignErrors = 0xbc,
102 REG_RxLongErrors = 0xc0,
103 REG_RxJabberErrors = 0xc4,
104 REG_RxPauseMacControlCounter = 0xc8,
105 REG_RxVeryLongErrors = 0xd0,
106 REG_RxRuntErrors = 0xd4,
107 REG_RxShortErrors = 0xd8,
108 REG_RxSequenceErrors = 0xe0,
109 REG_RxSymbolErrors = 0xe4,
110
111 REG_TxOctetsTotalOK = 0x100,
112 REG_TxOctetsBad = 0x104,
113 REG_TxUCPkts = 0x108,
114 REG_TxMCPkts = 0x10c,
115 REG_TxBCPkts = 0x110,
116 REG_TxJumboPkts = 0x12C,
117 REG_TxTotalCollisions = 0x134,
118 REG_TxExcessiveLengthDrop = 0x14c,
119 REG_TxUnderrun = 0x150,
120 REG_TxCRCErrors = 0x158,
121 REG_TxPauseFrames = 0x15c
122 };
123
124 enum {
125 DIVERSE_CONFIG_PAD_ENABLE = 0x80,
126 DIVERSE_CONFIG_CRC_ADD = 0x40
127 };
128
129 #define MACREG_BASE 0
130 #define MACREG(mac, mac_reg) ((mac)->instance->mac_base + (mac_reg))
131
132 struct _cmac_instance {
133 u32 mac_base;
134 u32 index;
135 u32 version;
136 u32 ticks;
137 };
138
139 static void disable_port(struct cmac *mac)
140 {
141 u32 val;
142
143 t1_tpi_read(mac->adapter, REG_PORT_ENABLE, &val);
144 val &= ~(1 << mac->instance->index);
145 t1_tpi_write(mac->adapter, REG_PORT_ENABLE, val);
146 }
147
148 #define RMON_UPDATE(mac, name, stat_name) \
149 t1_tpi_read((mac)->adapter, MACREG(mac, REG_##name), &val); \
150 (mac)->stats.stat_name += val;
151
152 /*
153 * Read the current values of the RMON counters and add them to the cumulative
154 * port statistics. The HW RMON counters are cleared by this operation.
155 */
156 static void port_stats_update(struct cmac *mac)
157 {
158 u32 val;
159
160 /* Rx stats */
161 RMON_UPDATE(mac, RxOctetsTotalOK, RxOctetsOK);
162 RMON_UPDATE(mac, RxOctetsBad, RxOctetsBad);
163 RMON_UPDATE(mac, RxUCPkts, RxUnicastFramesOK);
164 RMON_UPDATE(mac, RxMCPkts, RxMulticastFramesOK);
165 RMON_UPDATE(mac, RxBCPkts, RxBroadcastFramesOK);
166 RMON_UPDATE(mac, RxJumboPkts, RxJumboFramesOK);
167 RMON_UPDATE(mac, RxFCSErrors, RxFCSErrors);
168 RMON_UPDATE(mac, RxAlignErrors, RxAlignErrors);
169 RMON_UPDATE(mac, RxLongErrors, RxFrameTooLongErrors);
170 RMON_UPDATE(mac, RxVeryLongErrors, RxFrameTooLongErrors);
171 RMON_UPDATE(mac, RxPauseMacControlCounter, RxPauseFrames);
172 RMON_UPDATE(mac, RxDataErrors, RxDataErrors);
173 RMON_UPDATE(mac, RxJabberErrors, RxJabberErrors);
174 RMON_UPDATE(mac, RxRuntErrors, RxRuntErrors);
175 RMON_UPDATE(mac, RxShortErrors, RxRuntErrors);
176 RMON_UPDATE(mac, RxSequenceErrors, RxSequenceErrors);
177 RMON_UPDATE(mac, RxSymbolErrors, RxSymbolErrors);
178
179 /* Tx stats (skip collision stats as we are full-duplex only) */
180 RMON_UPDATE(mac, TxOctetsTotalOK, TxOctetsOK);
181 RMON_UPDATE(mac, TxOctetsBad, TxOctetsBad);
182 RMON_UPDATE(mac, TxUCPkts, TxUnicastFramesOK);
183 RMON_UPDATE(mac, TxMCPkts, TxMulticastFramesOK);
184 RMON_UPDATE(mac, TxBCPkts, TxBroadcastFramesOK);
185 RMON_UPDATE(mac, TxJumboPkts, TxJumboFramesOK);
186 RMON_UPDATE(mac, TxPauseFrames, TxPauseFrames);
187 RMON_UPDATE(mac, TxExcessiveLengthDrop, TxLengthErrors);
188 RMON_UPDATE(mac, TxUnderrun, TxUnderrun);
189 RMON_UPDATE(mac, TxCRCErrors, TxFCSErrors);
190 }
191
192 /* No-op interrupt operation as this MAC does not support interrupts */
193 static int mac_intr_op(struct cmac *mac)
194 {
195 return 0;
196 }
197
198 /* Expect MAC address to be in network byte order. */
199 static int mac_set_address(struct cmac *mac, u8 addr[6])
200 {
201 u32 addr_lo, addr_hi;
202
203 addr_lo = addr[2];
204 addr_lo = (addr_lo << 8) | addr[3];
205 addr_lo = (addr_lo << 8) | addr[4];
206 addr_lo = (addr_lo << 8) | addr[5];
207
208 addr_hi = addr[0];
209 addr_hi = (addr_hi << 8) | addr[1];
210
211 t1_tpi_write(mac->adapter, MACREG(mac, REG_MACADDR_LOW), addr_lo);
212 t1_tpi_write(mac->adapter, MACREG(mac, REG_MACADDR_HIGH), addr_hi);
213 return 0;
214 }
215
216 static int mac_get_address(struct cmac *mac, u8 addr[6])
217 {
218 u32 addr_lo, addr_hi;
219
220 t1_tpi_read(mac->adapter, MACREG(mac, REG_MACADDR_LOW), &addr_lo);
221 t1_tpi_read(mac->adapter, MACREG(mac, REG_MACADDR_HIGH), &addr_hi);
222
223 addr[0] = (u8) (addr_hi >> 8);
224 addr[1] = (u8) addr_hi;
225 addr[2] = (u8) (addr_lo >> 24);
226 addr[3] = (u8) (addr_lo >> 16);
227 addr[4] = (u8) (addr_lo >> 8);
228 addr[5] = (u8) addr_lo;
229 return 0;
230 }
231
232 /* This is intended to reset a port, not the whole MAC */
233 static int mac_reset(struct cmac *mac)
234 {
235 return 0;
236 }
237
238 static int mac_set_rx_mode(struct cmac *mac, struct t1_rx_mode *rm)
239 {
240 u32 val, new_mode;
241 adapter_t *adapter = mac->adapter;
242 u32 addr_lo, addr_hi;
243 u8 *addr;
244
245 t1_tpi_read(adapter, MACREG(mac, REG_RX_FILTER), &val);
246 new_mode = val & ~7;
247 if (!t1_rx_mode_promisc(rm) && mac->instance->version > 0)
248 new_mode |= 1; /* only set if version > 0 due to erratum */
249 if (!t1_rx_mode_promisc(rm) && !t1_rx_mode_allmulti(rm)
250 && t1_rx_mode_mc_cnt(rm) <= 1)
251 new_mode |= 2;
252 if (new_mode != val)
253 t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), new_mode);
254 switch (t1_rx_mode_mc_cnt(rm)) {
255 case 0:
256 t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_LOW), 0);
257 t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_HIGH), 0);
258 break;
259 case 1:
260 addr = t1_get_next_mcaddr(rm);
261 addr_lo = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) |
262 addr[5];
263 addr_hi = (addr[0] << 8) | addr[1];
264 t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_LOW), addr_lo);
265 t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_HIGH), addr_hi);
266 break;
267 default:
268 break;
269 }
270 return 0;
271 }
272
273 static int mac_set_mtu(struct cmac *mac, int mtu)
274 {
275 /* MAX_FRAME_SIZE inludes header + FCS, mtu doesn't */
276 if (mtu > (MAX_FRAME_SIZE - 14 - 4)) return -EINVAL;
277 t1_tpi_write(mac->adapter, MACREG(mac, REG_MAX_FRAME_SIZE),
278 mtu + 14 + 4);
279 return 0;
280 }
281
282 static int mac_set_speed_duplex_fc(struct cmac *mac, int speed, int duplex,
283 int fc)
284 {
285 u32 val;
286
287 if (speed >= 0 && speed != SPEED_100 && speed != SPEED_1000)
288 return -1;
289 if (duplex >= 0 && duplex != DUPLEX_FULL)
290 return -1;
291
292 if (speed >= 0) {
293 val = speed == SPEED_100 ? 1 : 2;
294 t1_tpi_write(mac->adapter, MACREG(mac, REG_RGMII_SPEED), val);
295 }
296
297 t1_tpi_read(mac->adapter, MACREG(mac, REG_FC_ENABLE), &val);
298 val &= ~3;
299 if (fc & PAUSE_RX)
300 val |= 1;
301 if (fc & PAUSE_TX)
302 val |= 2;
303 t1_tpi_write(mac->adapter, MACREG(mac, REG_FC_ENABLE), val);
304 return 0;
305 }
306
307 static int mac_get_speed_duplex_fc(struct cmac *mac, int *speed, int *duplex,
308 int *fc)
309 {
310 u32 val;
311
312 if (duplex)
313 *duplex = DUPLEX_FULL;
314 if (speed) {
315 t1_tpi_read(mac->adapter, MACREG(mac, REG_RGMII_SPEED),
316 &val);
317 *speed = (val & 2) ? SPEED_1000 : SPEED_100;
318 }
319 if (fc) {
320 t1_tpi_read(mac->adapter, MACREG(mac, REG_FC_ENABLE), &val);
321 *fc = 0;
322 if (val & 1)
323 *fc |= PAUSE_RX;
324 if (val & 2)
325 *fc |= PAUSE_TX;
326 }
327 return 0;
328 }
329
330 static void enable_port(struct cmac *mac)
331 {
332 u32 val;
333 u32 index = mac->instance->index;
334 adapter_t *adapter = mac->adapter;
335
336 t1_tpi_read(adapter, MACREG(mac, REG_DIVERSE_CONFIG), &val);
337 val |= DIVERSE_CONFIG_CRC_ADD | DIVERSE_CONFIG_PAD_ENABLE;
338 t1_tpi_write(adapter, MACREG(mac, REG_DIVERSE_CONFIG), val);
339 if (mac->instance->version > 0)
340 t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), 3);
341 else /* Don't enable unicast address filtering due to IXF1010 bug */
342 t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), 2);
343
344 t1_tpi_read(adapter, REG_RX_ERR_DROP, &val);
345 val |= (1 << index);
346 t1_tpi_write(adapter, REG_RX_ERR_DROP, val);
347
348 /*
349 * Clear the port RMON registers by adding their current values to the
350 * cumulatice port stats and then clearing the stats. Really.
351 */
352 port_stats_update(mac);
353 memset(&mac->stats, 0, sizeof(struct cmac_statistics));
354 mac->instance->ticks = 0;
355
356 t1_tpi_read(adapter, REG_PORT_ENABLE, &val);
357 val |= (1 << index);
358 t1_tpi_write(adapter, REG_PORT_ENABLE, val);
359
360 index <<= 2;
361 if (is_T2(adapter)) {
362 /* T204: set the Fifo water level & threshold */
363 t1_tpi_write(adapter, RX_FIFO_HIGH_WATERMARK_BASE + index, 0x740);
364 t1_tpi_write(adapter, RX_FIFO_LOW_WATERMARK_BASE + index, 0x730);
365 t1_tpi_write(adapter, TX_FIFO_HIGH_WATERMARK_BASE + index, 0x600);
366 t1_tpi_write(adapter, TX_FIFO_LOW_WATERMARK_BASE + index, 0x1d0);
367 t1_tpi_write(adapter, TX_FIFO_XFER_THRES_BASE + index, 0x1100);
368 } else {
369 /*
370 * Set the TX Fifo Threshold to 0x400 instead of 0x100 to work around
371 * Underrun problem. Intel has blessed this solution.
372 */
373 t1_tpi_write(adapter, TX_FIFO_XFER_THRES_BASE + index, 0x400);
374 }
375 }
376
377 /* IXF1010 ports do not have separate enables for TX and RX */
378 static int mac_enable(struct cmac *mac, int which)
379 {
380 if (which & (MAC_DIRECTION_RX | MAC_DIRECTION_TX))
381 enable_port(mac);
382 return 0;
383 }
384
385 static int mac_disable(struct cmac *mac, int which)
386 {
387 if (which & (MAC_DIRECTION_RX | MAC_DIRECTION_TX))
388 disable_port(mac);
389 return 0;
390 }
391
392 /*
393 * This function is called periodically to accumulate the current values of the
394 * RMON counters into the port statistics. Since the counters are only 32 bits
395 * some of them can overflow in less than a minute at GigE speeds, so this
396 * function should be called every 30 seconds or so.
397 *
398 * To cut down on reading costs we update only the octet counters at each tick
399 * and do a full update at major ticks, which can be every 30 minutes or more.
400 */
401 static const struct cmac_statistics *mac_update_statistics(struct cmac *mac,
402 int flag)
403 {
404 if (flag == MAC_STATS_UPDATE_FULL ||
405 MAJOR_UPDATE_TICKS <= mac->instance->ticks) {
406 port_stats_update(mac);
407 mac->instance->ticks = 0;
408 } else {
409 u32 val;
410
411 RMON_UPDATE(mac, RxOctetsTotalOK, RxOctetsOK);
412 RMON_UPDATE(mac, TxOctetsTotalOK, TxOctetsOK);
413 mac->instance->ticks++;
414 }
415 return &mac->stats;
416 }
417
418 static void mac_destroy(struct cmac *mac)
419 {
420 kfree(mac);
421 }
422
423 static struct cmac_ops ixf1010_ops = {
424 .destroy = mac_destroy,
425 .reset = mac_reset,
426 .interrupt_enable = mac_intr_op,
427 .interrupt_disable = mac_intr_op,
428 .interrupt_clear = mac_intr_op,
429 .enable = mac_enable,
430 .disable = mac_disable,
431 .set_mtu = mac_set_mtu,
432 .set_rx_mode = mac_set_rx_mode,
433 .set_speed_duplex_fc = mac_set_speed_duplex_fc,
434 .get_speed_duplex_fc = mac_get_speed_duplex_fc,
435 .statistics_update = mac_update_statistics,
436 .macaddress_get = mac_get_address,
437 .macaddress_set = mac_set_address,
438 };
439
440 static int ixf1010_mac_reset(adapter_t *adapter)
441 {
442 u32 val;
443
444 t1_tpi_read(adapter, A_ELMER0_GPO, &val);
445 if ((val & 1) != 0) {
446 val &= ~1;
447 t1_tpi_write(adapter, A_ELMER0_GPO, val);
448 udelay(2);
449 }
450 val |= 1;
451 t1_tpi_write(adapter, A_ELMER0_GPO, val);
452 udelay(2);
453
454 t1_tpi_write(adapter, REG_PORT_ENABLE, 0);
455 return 0;
456 }
457
458 static struct cmac *ixf1010_mac_create(adapter_t *adapter, int index)
459 {
460 struct cmac *mac;
461 u32 val;
462
463 if (index > 9) return NULL;
464
465 mac = kzalloc(sizeof(*mac) + sizeof(cmac_instance), GFP_KERNEL);
466 if (!mac) return NULL;
467
468 mac->ops = &ixf1010_ops;
469 mac->instance = (cmac_instance *)(mac + 1);
470
471 mac->instance->mac_base = MACREG_BASE + (index * 0x200);
472 mac->instance->index = index;
473 mac->adapter = adapter;
474 mac->instance->ticks = 0;
475
476 t1_tpi_read(adapter, REG_JTAG_ID, &val);
477 mac->instance->version = val >> 28;
478 return mac;
479 }
480
481 struct gmac t1_ixf1010_ops = {
482 STATS_TICK_SECS,
483 ixf1010_mac_create,
484 ixf1010_mac_reset
485 };
Linux with added FPC-III support