tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2008 Solarflare Communications Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
9 */
10
11#include <linux/delay.h>
12#include "net_driver.h"
13#include "efx.h"
14#include "falcon.h"
15#include "falcon_hwdefs.h"
16#include "falcon_io.h"
17#include "mac.h"
18#include "mdio_10g.h"
19#include "phy.h"
20#include "boards.h"
21#include "workarounds.h"
22
23/**************************************************************************
24 *
25 * MAC operations
26 *
27 *************************************************************************/
28
29/* Configure the XAUI driver that is an output from Falcon */
30static void falcon_setup_xaui(struct efx_nic *efx)
31{
32 efx_oword_t sdctl, txdrv;
33
34 /* Move the XAUI into low power, unless there is no PHY, in
35 * which case the XAUI will have to drive a cable. */
36 if (efx->phy_type == PHY_TYPE_NONE)
37 return;
38
39 falcon_read(efx, &sdctl, XX_SD_CTL_REG);
40 EFX_SET_OWORD_FIELD(sdctl, XX_HIDRVD, XX_SD_CTL_DRV_DEFAULT);
41 EFX_SET_OWORD_FIELD(sdctl, XX_LODRVD, XX_SD_CTL_DRV_DEFAULT);
42 EFX_SET_OWORD_FIELD(sdctl, XX_HIDRVC, XX_SD_CTL_DRV_DEFAULT);
43 EFX_SET_OWORD_FIELD(sdctl, XX_LODRVC, XX_SD_CTL_DRV_DEFAULT);
44 EFX_SET_OWORD_FIELD(sdctl, XX_HIDRVB, XX_SD_CTL_DRV_DEFAULT);
45 EFX_SET_OWORD_FIELD(sdctl, XX_LODRVB, XX_SD_CTL_DRV_DEFAULT);
46 EFX_SET_OWORD_FIELD(sdctl, XX_HIDRVA, XX_SD_CTL_DRV_DEFAULT);
47 EFX_SET_OWORD_FIELD(sdctl, XX_LODRVA, XX_SD_CTL_DRV_DEFAULT);
48 falcon_write(efx, &sdctl, XX_SD_CTL_REG);
49
50 EFX_POPULATE_OWORD_8(txdrv,
51 XX_DEQD, XX_TXDRV_DEQ_DEFAULT,
52 XX_DEQC, XX_TXDRV_DEQ_DEFAULT,
53 XX_DEQB, XX_TXDRV_DEQ_DEFAULT,
54 XX_DEQA, XX_TXDRV_DEQ_DEFAULT,
55 XX_DTXD, XX_TXDRV_DTX_DEFAULT,
56 XX_DTXC, XX_TXDRV_DTX_DEFAULT,
57 XX_DTXB, XX_TXDRV_DTX_DEFAULT,
58 XX_DTXA, XX_TXDRV_DTX_DEFAULT);
59 falcon_write(efx, &txdrv, XX_TXDRV_CTL_REG);
60}
61
62int falcon_reset_xaui(struct efx_nic *efx)
63{
64 efx_oword_t reg;
65 int count;
66
67 EFX_POPULATE_DWORD_1(reg, XX_RST_XX_EN, 1);
68 falcon_write(efx, ®, XX_PWR_RST_REG);
69
70 /* Give some time for the link to establish */
71 for (count = 0; count < 1000; count++) { /* wait upto 10ms */
72 falcon_read(efx, ®, XX_PWR_RST_REG);
73 if (EFX_OWORD_FIELD(reg, XX_RST_XX_EN) == 0) {
74 falcon_setup_xaui(efx);
75 return 0;
76 }
77 udelay(10);
78 }
79 EFX_ERR(efx, "timed out waiting for XAUI/XGXS reset\n");
80 return -ETIMEDOUT;
81}
82
83static void falcon_mask_status_intr(struct efx_nic *efx, bool enable)
84{
85 efx_oword_t reg;
86
87 if ((falcon_rev(efx) != FALCON_REV_B0) || LOOPBACK_INTERNAL(efx))
88 return;
89
90 /* We expect xgmii faults if the wireside link is up */
91 if (!EFX_WORKAROUND_5147(efx) || !efx->link_up)
92 return;
93
94 /* We can only use this interrupt to signal the negative edge of
95 * xaui_align [we have to poll the positive edge]. */
96 if (!efx->mac_up)
97 return;
98
99 /* Flush the ISR */
100 if (enable)
101 falcon_read(efx, ®, XM_MGT_INT_REG_B0);
102
103 EFX_POPULATE_OWORD_2(reg,
104 XM_MSK_RMTFLT, !enable,
105 XM_MSK_LCLFLT, !enable);
106 falcon_write(efx, ®, XM_MGT_INT_MSK_REG_B0);
107}
108
109/* Get status of XAUI link */
110bool falcon_xaui_link_ok(struct efx_nic *efx)
111{
112 efx_oword_t reg;
113 bool align_done, link_ok = false;
114 int sync_status;
115
116 if (LOOPBACK_INTERNAL(efx))
117 return true;
118
119 /* Read link status */
120 falcon_read(efx, ®, XX_CORE_STAT_REG);
121
122 align_done = EFX_OWORD_FIELD(reg, XX_ALIGN_DONE);
123 sync_status = EFX_OWORD_FIELD(reg, XX_SYNC_STAT);
124 if (align_done && (sync_status == XX_SYNC_STAT_DECODE_SYNCED))
125 link_ok = true;
126
127 /* Clear link status ready for next read */
128 EFX_SET_OWORD_FIELD(reg, XX_COMMA_DET, XX_COMMA_DET_RESET);
129 EFX_SET_OWORD_FIELD(reg, XX_CHARERR, XX_CHARERR_RESET);
130 EFX_SET_OWORD_FIELD(reg, XX_DISPERR, XX_DISPERR_RESET);
131 falcon_write(efx, ®, XX_CORE_STAT_REG);
132
133 /* If the link is up, then check the phy side of the xaui link */
134 if (efx->link_up && link_ok)
135 if (efx->phy_op->mmds & (1 << MDIO_MMD_PHYXS))
136 link_ok = efx_mdio_phyxgxs_lane_sync(efx);
137
138 return link_ok;
139}
140
141static void falcon_reconfigure_xmac_core(struct efx_nic *efx)
142{
143 unsigned int max_frame_len;
144 efx_oword_t reg;
145 bool rx_fc = !!(efx->link_fc & EFX_FC_RX);
146
147 /* Configure MAC - cut-thru mode is hard wired on */
148 EFX_POPULATE_DWORD_3(reg,
149 XM_RX_JUMBO_MODE, 1,
150 XM_TX_STAT_EN, 1,
151 XM_RX_STAT_EN, 1);
152 falcon_write(efx, ®, XM_GLB_CFG_REG);
153
154 /* Configure TX */
155 EFX_POPULATE_DWORD_6(reg,
156 XM_TXEN, 1,
157 XM_TX_PRMBL, 1,
158 XM_AUTO_PAD, 1,
159 XM_TXCRC, 1,
160 XM_FCNTL, 1,
161 XM_IPG, 0x3);
162 falcon_write(efx, ®, XM_TX_CFG_REG);
163
164 /* Configure RX */
165 EFX_POPULATE_DWORD_5(reg,
166 XM_RXEN, 1,
167 XM_AUTO_DEPAD, 0,
168 XM_ACPT_ALL_MCAST, 1,
169 XM_ACPT_ALL_UCAST, efx->promiscuous,
170 XM_PASS_CRC_ERR, 1);
171 falcon_write(efx, ®, XM_RX_CFG_REG);
172
173 /* Set frame length */
174 max_frame_len = EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
175 EFX_POPULATE_DWORD_1(reg, XM_MAX_RX_FRM_SIZE, max_frame_len);
176 falcon_write(efx, ®, XM_RX_PARAM_REG);
177 EFX_POPULATE_DWORD_2(reg,
178 XM_MAX_TX_FRM_SIZE, max_frame_len,
179 XM_TX_JUMBO_MODE, 1);
180 falcon_write(efx, ®, XM_TX_PARAM_REG);
181
182 EFX_POPULATE_DWORD_2(reg,
183 XM_PAUSE_TIME, 0xfffe, /* MAX PAUSE TIME */
184 XM_DIS_FCNTL, !rx_fc);
185 falcon_write(efx, ®, XM_FC_REG);
186
187 /* Set MAC address */
188 EFX_POPULATE_DWORD_4(reg,
189 XM_ADR_0, efx->net_dev->dev_addr[0],
190 XM_ADR_1, efx->net_dev->dev_addr[1],
191 XM_ADR_2, efx->net_dev->dev_addr[2],
192 XM_ADR_3, efx->net_dev->dev_addr[3]);
193 falcon_write(efx, ®, XM_ADR_LO_REG);
194 EFX_POPULATE_DWORD_2(reg,
195 XM_ADR_4, efx->net_dev->dev_addr[4],
196 XM_ADR_5, efx->net_dev->dev_addr[5]);
197 falcon_write(efx, ®, XM_ADR_HI_REG);
198}
199
200static void falcon_reconfigure_xgxs_core(struct efx_nic *efx)
201{
202 efx_oword_t reg;
203 bool xgxs_loopback = (efx->loopback_mode == LOOPBACK_XGXS);
204 bool xaui_loopback = (efx->loopback_mode == LOOPBACK_XAUI);
205 bool xgmii_loopback = (efx->loopback_mode == LOOPBACK_XGMII);
206
207 /* XGXS block is flaky and will need to be reset if moving
208 * into our out of XGMII, XGXS or XAUI loopbacks. */
209 if (EFX_WORKAROUND_5147(efx)) {
210 bool old_xgmii_loopback, old_xgxs_loopback, old_xaui_loopback;
211 bool reset_xgxs;
212
213 falcon_read(efx, ®, XX_CORE_STAT_REG);
214 old_xgxs_loopback = EFX_OWORD_FIELD(reg, XX_XGXS_LB_EN);
215 old_xgmii_loopback = EFX_OWORD_FIELD(reg, XX_XGMII_LB_EN);
216
217 falcon_read(efx, ®, XX_SD_CTL_REG);
218 old_xaui_loopback = EFX_OWORD_FIELD(reg, XX_LPBKA);
219
220 /* The PHY driver may have turned XAUI off */
221 reset_xgxs = ((xgxs_loopback != old_xgxs_loopback) ||
222 (xaui_loopback != old_xaui_loopback) ||
223 (xgmii_loopback != old_xgmii_loopback));
224
225 if (reset_xgxs)
226 falcon_reset_xaui(efx);
227 }
228
229 falcon_read(efx, ®, XX_CORE_STAT_REG);
230 EFX_SET_OWORD_FIELD(reg, XX_FORCE_SIG,
231 (xgxs_loopback || xaui_loopback) ?
232 XX_FORCE_SIG_DECODE_FORCED : 0);
233 EFX_SET_OWORD_FIELD(reg, XX_XGXS_LB_EN, xgxs_loopback);
234 EFX_SET_OWORD_FIELD(reg, XX_XGMII_LB_EN, xgmii_loopback);
235 falcon_write(efx, ®, XX_CORE_STAT_REG);
236
237 falcon_read(efx, ®, XX_SD_CTL_REG);
238 EFX_SET_OWORD_FIELD(reg, XX_LPBKD, xaui_loopback);
239 EFX_SET_OWORD_FIELD(reg, XX_LPBKC, xaui_loopback);
240 EFX_SET_OWORD_FIELD(reg, XX_LPBKB, xaui_loopback);
241 EFX_SET_OWORD_FIELD(reg, XX_LPBKA, xaui_loopback);
242 falcon_write(efx, ®, XX_SD_CTL_REG);
243}
244
245
246/* Try and bring the Falcon side of the Falcon-Phy XAUI link fails
247 * to come back up. Bash it until it comes back up */
248static void falcon_check_xaui_link_up(struct efx_nic *efx, int tries)
249{
250 efx->mac_up = falcon_xaui_link_ok(efx);
251
252 if ((efx->loopback_mode == LOOPBACK_NETWORK) ||
253 efx_phy_mode_disabled(efx->phy_mode))
254 /* XAUI link is expected to be down */
255 return;
256
257 while (!efx->mac_up && tries) {
258 EFX_LOG(efx, "bashing xaui\n");
259 falcon_reset_xaui(efx);
260 udelay(200);
261
262 efx->mac_up = falcon_xaui_link_ok(efx);
263 --tries;
264 }
265}
266
267static void falcon_reconfigure_xmac(struct efx_nic *efx)
268{
269 falcon_mask_status_intr(efx, false);
270
271 falcon_reconfigure_xgxs_core(efx);
272 falcon_reconfigure_xmac_core(efx);
273
274 falcon_reconfigure_mac_wrapper(efx);
275
276 falcon_check_xaui_link_up(efx, 5);
277 falcon_mask_status_intr(efx, true);
278}
279
280static void falcon_update_stats_xmac(struct efx_nic *efx)
281{
282 struct efx_mac_stats *mac_stats = &efx->mac_stats;
283 int rc;
284
285 rc = falcon_dma_stats(efx, XgDmaDone_offset);
286 if (rc)
287 return;
288
289 /* Update MAC stats from DMAed values */
290 FALCON_STAT(efx, XgRxOctets, rx_bytes);
291 FALCON_STAT(efx, XgRxOctetsOK, rx_good_bytes);
292 FALCON_STAT(efx, XgRxPkts, rx_packets);
293 FALCON_STAT(efx, XgRxPktsOK, rx_good);
294 FALCON_STAT(efx, XgRxBroadcastPkts, rx_broadcast);
295 FALCON_STAT(efx, XgRxMulticastPkts, rx_multicast);
296 FALCON_STAT(efx, XgRxUnicastPkts, rx_unicast);
297 FALCON_STAT(efx, XgRxUndersizePkts, rx_lt64);
298 FALCON_STAT(efx, XgRxOversizePkts, rx_gtjumbo);
299 FALCON_STAT(efx, XgRxJabberPkts, rx_bad_gtjumbo);
300 FALCON_STAT(efx, XgRxUndersizeFCSerrorPkts, rx_bad_lt64);
301 FALCON_STAT(efx, XgRxDropEvents, rx_overflow);
302 FALCON_STAT(efx, XgRxFCSerrorPkts, rx_bad);
303 FALCON_STAT(efx, XgRxAlignError, rx_align_error);
304 FALCON_STAT(efx, XgRxSymbolError, rx_symbol_error);
305 FALCON_STAT(efx, XgRxInternalMACError, rx_internal_error);
306 FALCON_STAT(efx, XgRxControlPkts, rx_control);
307 FALCON_STAT(efx, XgRxPausePkts, rx_pause);
308 FALCON_STAT(efx, XgRxPkts64Octets, rx_64);
309 FALCON_STAT(efx, XgRxPkts65to127Octets, rx_65_to_127);
310 FALCON_STAT(efx, XgRxPkts128to255Octets, rx_128_to_255);
311 FALCON_STAT(efx, XgRxPkts256to511Octets, rx_256_to_511);
312 FALCON_STAT(efx, XgRxPkts512to1023Octets, rx_512_to_1023);
313 FALCON_STAT(efx, XgRxPkts1024to15xxOctets, rx_1024_to_15xx);
314 FALCON_STAT(efx, XgRxPkts15xxtoMaxOctets, rx_15xx_to_jumbo);
315 FALCON_STAT(efx, XgRxLengthError, rx_length_error);
316 FALCON_STAT(efx, XgTxPkts, tx_packets);
317 FALCON_STAT(efx, XgTxOctets, tx_bytes);
318 FALCON_STAT(efx, XgTxMulticastPkts, tx_multicast);
319 FALCON_STAT(efx, XgTxBroadcastPkts, tx_broadcast);
320 FALCON_STAT(efx, XgTxUnicastPkts, tx_unicast);
321 FALCON_STAT(efx, XgTxControlPkts, tx_control);
322 FALCON_STAT(efx, XgTxPausePkts, tx_pause);
323 FALCON_STAT(efx, XgTxPkts64Octets, tx_64);
324 FALCON_STAT(efx, XgTxPkts65to127Octets, tx_65_to_127);
325 FALCON_STAT(efx, XgTxPkts128to255Octets, tx_128_to_255);
326 FALCON_STAT(efx, XgTxPkts256to511Octets, tx_256_to_511);
327 FALCON_STAT(efx, XgTxPkts512to1023Octets, tx_512_to_1023);
328 FALCON_STAT(efx, XgTxPkts1024to15xxOctets, tx_1024_to_15xx);
329 FALCON_STAT(efx, XgTxPkts1519toMaxOctets, tx_15xx_to_jumbo);
330 FALCON_STAT(efx, XgTxUndersizePkts, tx_lt64);
331 FALCON_STAT(efx, XgTxOversizePkts, tx_gtjumbo);
332 FALCON_STAT(efx, XgTxNonTcpUdpPkt, tx_non_tcpudp);
333 FALCON_STAT(efx, XgTxMacSrcErrPkt, tx_mac_src_error);
334 FALCON_STAT(efx, XgTxIpSrcErrPkt, tx_ip_src_error);
335
336 /* Update derived statistics */
337 mac_stats->tx_good_bytes =
338 (mac_stats->tx_bytes - mac_stats->tx_bad_bytes -
339 mac_stats->tx_control * 64);
340 mac_stats->rx_bad_bytes =
341 (mac_stats->rx_bytes - mac_stats->rx_good_bytes -
342 mac_stats->rx_control * 64);
343}
344
345static void falcon_xmac_irq(struct efx_nic *efx)
346{
347 /* The XGMII link has a transient fault, which indicates either:
348 * - there's a transient xgmii fault
349 * - falcon's end of the xaui link may need a kick
350 * - the wire-side link may have gone down, but the lasi/poll()
351 * hasn't noticed yet.
352 *
353 * We only want to even bother polling XAUI if we're confident it's
354 * not (1) or (3). In both cases, the only reliable way to spot this
355 * is to wait a bit. We do this here by forcing the mac link state
356 * to down, and waiting for the mac poll to come round and check
357 */
358 efx->mac_up = false;
359}
360
361static void falcon_poll_xmac(struct efx_nic *efx)
362{
363 if (!EFX_WORKAROUND_5147(efx) || !efx->link_up || efx->mac_up)
364 return;
365
366 falcon_mask_status_intr(efx, false);
367 falcon_check_xaui_link_up(efx, 1);
368 falcon_mask_status_intr(efx, true);
369}
370
371struct efx_mac_operations falcon_xmac_operations = {
372 .reconfigure = falcon_reconfigure_xmac,
373 .update_stats = falcon_update_stats_xmac,
374 .irq = falcon_xmac_irq,
375 .poll = falcon_poll_xmac,
376};