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target-ppc: Extract MPC82xx aliases to *_HiP4
[qemu/agraf.git] / hw / e1000.c
blob45cc3300cfa922081e5fb9cdc56f501c68e2b9ae
1 /*
2 * QEMU e1000 emulation
3 *
4 * Software developer's manual:
5 * http://download.intel.com/design/network/manuals/8254x_GBe_SDM.pdf
6 *
7 * Nir Peleg, Tutis Systems Ltd. for Qumranet Inc.
8 * Copyright (c) 2008 Qumranet
9 * Based on work done by:
10 * Copyright (c) 2007 Dan Aloni
11 * Copyright (c) 2004 Antony T Curtis
12 *
13 * This library is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2 of the License, or (at your option) any later version.
17 *
18 * This library is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
22 *
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
25 */
26
27
28 #include "hw.h"
29 #include "pci/pci.h"
30 #include "net/net.h"
31 #include "net/checksum.h"
32 #include "loader.h"
33 #include "sysemu/sysemu.h"
34 #include "sysemu/dma.h"
35
36 #include "e1000_hw.h"
37
38 #define E1000_DEBUG
39
40 #ifdef E1000_DEBUG
41 enum {
42 DEBUG_GENERAL, DEBUG_IO, DEBUG_MMIO, DEBUG_INTERRUPT,
43 DEBUG_RX, DEBUG_TX, DEBUG_MDIC, DEBUG_EEPROM,
44 DEBUG_UNKNOWN, DEBUG_TXSUM, DEBUG_TXERR, DEBUG_RXERR,
45 DEBUG_RXFILTER, DEBUG_PHY, DEBUG_NOTYET,
46 };
47 #define DBGBIT(x) (1<<DEBUG_##x)
48 static int debugflags = DBGBIT(TXERR) | DBGBIT(GENERAL);
49
50 #define DBGOUT(what, fmt, ...) do { \
51 if (debugflags & DBGBIT(what)) \
52 fprintf(stderr, "e1000: " fmt, ## __VA_ARGS__); \
53 } while (0)
54 #else
55 #define DBGOUT(what, fmt, ...) do {} while (0)
56 #endif
57
58 #define IOPORT_SIZE 0x40
59 #define PNPMMIO_SIZE 0x20000
60 #define MIN_BUF_SIZE 60 /* Min. octets in an ethernet frame sans FCS */
61
62 /* this is the size past which hardware will drop packets when setting LPE=0 */
63 #define MAXIMUM_ETHERNET_VLAN_SIZE 1522
64 /* this is the size past which hardware will drop packets when setting LPE=1 */
65 #define MAXIMUM_ETHERNET_LPE_SIZE 16384
66
67 /*
68 * HW models:
69 * E1000_DEV_ID_82540EM works with Windows and Linux
70 * E1000_DEV_ID_82573L OK with windoze and Linux 2.6.22,
71 * appears to perform better than 82540EM, but breaks with Linux 2.6.18
72 * E1000_DEV_ID_82544GC_COPPER appears to work; not well tested
73 * Others never tested
74 */
75 enum { E1000_DEVID = E1000_DEV_ID_82540EM };
76
77 /*
78 * May need to specify additional MAC-to-PHY entries --
79 * Intel's Windows driver refuses to initialize unless they match
80 */
81 enum {
82 PHY_ID2_INIT = E1000_DEVID == E1000_DEV_ID_82573L ? 0xcc2 :
83 E1000_DEVID == E1000_DEV_ID_82544GC_COPPER ? 0xc30 :
84 /* default to E1000_DEV_ID_82540EM */ 0xc20
85 };
86
87 typedef struct E1000State_st {
88 PCIDevice dev;
89 NICState *nic;
90 NICConf conf;
91 MemoryRegion mmio;
92 MemoryRegion io;
93
94 uint32_t mac_reg[0x8000];
95 uint16_t phy_reg[0x20];
96 uint16_t eeprom_data[64];
97
98 uint32_t rxbuf_size;
99 uint32_t rxbuf_min_shift;
100 struct e1000_tx {
101 unsigned char header[256];
102 unsigned char vlan_header[4];
103 /* Fields vlan and data must not be reordered or separated. */
104 unsigned char vlan[4];
105 unsigned char data[0x10000];
106 uint16_t size;
107 unsigned char sum_needed;
108 unsigned char vlan_needed;
109 uint8_t ipcss;
110 uint8_t ipcso;
111 uint16_t ipcse;
112 uint8_t tucss;
113 uint8_t tucso;
114 uint16_t tucse;
115 uint8_t hdr_len;
116 uint16_t mss;
117 uint32_t paylen;
118 uint16_t tso_frames;
119 char tse;
120 int8_t ip;
121 int8_t tcp;
122 char cptse; // current packet tse bit
123 } tx;
124
125 struct {
126 uint32_t val_in; // shifted in from guest driver
127 uint16_t bitnum_in;
128 uint16_t bitnum_out;
129 uint16_t reading;
130 uint32_t old_eecd;
131 } eecd_state;
132
133 QEMUTimer *autoneg_timer;
134
135 /* Compatibility flags for migration to/from qemu 1.3.0 and older */
136 #define E1000_FLAG_AUTONEG_BIT 0
137 #define E1000_FLAG_AUTONEG (1 << E1000_FLAG_AUTONEG_BIT)
138 uint32_t compat_flags;
139 } E1000State;
140
141 #define defreg(x) x = (E1000_##x>>2)
142 enum {
143 defreg(CTRL), defreg(EECD), defreg(EERD), defreg(GPRC),
144 defreg(GPTC), defreg(ICR), defreg(ICS), defreg(IMC),
145 defreg(IMS), defreg(LEDCTL), defreg(MANC), defreg(MDIC),
146 defreg(MPC), defreg(PBA), defreg(RCTL), defreg(RDBAH),
147 defreg(RDBAL), defreg(RDH), defreg(RDLEN), defreg(RDT),
148 defreg(STATUS), defreg(SWSM), defreg(TCTL), defreg(TDBAH),
149 defreg(TDBAL), defreg(TDH), defreg(TDLEN), defreg(TDT),
150 defreg(TORH), defreg(TORL), defreg(TOTH), defreg(TOTL),
151 defreg(TPR), defreg(TPT), defreg(TXDCTL), defreg(WUFC),
152 defreg(RA), defreg(MTA), defreg(CRCERRS),defreg(VFTA),
153 defreg(VET),
154 };
155
156 static void
157 e1000_link_down(E1000State *s)
158 {
159 s->mac_reg[STATUS] &= ~E1000_STATUS_LU;
160 s->phy_reg[PHY_STATUS] &= ~MII_SR_LINK_STATUS;
161 }
162
163 static void
164 e1000_link_up(E1000State *s)
165 {
166 s->mac_reg[STATUS] |= E1000_STATUS_LU;
167 s->phy_reg[PHY_STATUS] |= MII_SR_LINK_STATUS;
168 }
169
170 static void
171 set_phy_ctrl(E1000State *s, int index, uint16_t val)
172 {
173 /*
174 * QEMU 1.3 does not support link auto-negotiation emulation, so if we
175 * migrate during auto negotiation, after migration the link will be
176 * down.
177 */
178 if (!(s->compat_flags & E1000_FLAG_AUTONEG)) {
179 return;
180 }
181 if ((val & MII_CR_AUTO_NEG_EN) && (val & MII_CR_RESTART_AUTO_NEG)) {
182 e1000_link_down(s);
183 s->phy_reg[PHY_STATUS] &= ~MII_SR_AUTONEG_COMPLETE;
184 DBGOUT(PHY, "Start link auto negotiation\n");
185 qemu_mod_timer(s->autoneg_timer, qemu_get_clock_ms(vm_clock) + 500);
186 }
187 }
188
189 static void
190 e1000_autoneg_timer(void *opaque)
191 {
192 E1000State *s = opaque;
193 if (!qemu_get_queue(s->nic)->link_down) {
194 e1000_link_up(s);
195 }
196 s->phy_reg[PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE;
197 DBGOUT(PHY, "Auto negotiation is completed\n");
198 }
199
200 static void (*phyreg_writeops[])(E1000State *, int, uint16_t) = {
201 [PHY_CTRL] = set_phy_ctrl,
202 };
203
204 enum { NPHYWRITEOPS = ARRAY_SIZE(phyreg_writeops) };
205
206 enum { PHY_R = 1, PHY_W = 2, PHY_RW = PHY_R | PHY_W };
207 static const char phy_regcap[0x20] = {
208 [PHY_STATUS] = PHY_R, [M88E1000_EXT_PHY_SPEC_CTRL] = PHY_RW,
209 [PHY_ID1] = PHY_R, [M88E1000_PHY_SPEC_CTRL] = PHY_RW,
210 [PHY_CTRL] = PHY_RW, [PHY_1000T_CTRL] = PHY_RW,
211 [PHY_LP_ABILITY] = PHY_R, [PHY_1000T_STATUS] = PHY_R,
212 [PHY_AUTONEG_ADV] = PHY_RW, [M88E1000_RX_ERR_CNTR] = PHY_R,
213 [PHY_ID2] = PHY_R, [M88E1000_PHY_SPEC_STATUS] = PHY_R
214 };
215
216 static const uint16_t phy_reg_init[] = {
217 [PHY_CTRL] = 0x1140,
218 [PHY_STATUS] = 0x794d, /* link initially up with not completed autoneg */
219 [PHY_ID1] = 0x141, [PHY_ID2] = PHY_ID2_INIT,
220 [PHY_1000T_CTRL] = 0x0e00, [M88E1000_PHY_SPEC_CTRL] = 0x360,
221 [M88E1000_EXT_PHY_SPEC_CTRL] = 0x0d60, [PHY_AUTONEG_ADV] = 0xde1,
222 [PHY_LP_ABILITY] = 0x1e0, [PHY_1000T_STATUS] = 0x3c00,
223 [M88E1000_PHY_SPEC_STATUS] = 0xac00,
224 };
225
226 static const uint32_t mac_reg_init[] = {
227 [PBA] = 0x00100030,
228 [LEDCTL] = 0x602,
229 [CTRL] = E1000_CTRL_SWDPIN2 | E1000_CTRL_SWDPIN0 |
230 E1000_CTRL_SPD_1000 | E1000_CTRL_SLU,
231 [STATUS] = 0x80000000 | E1000_STATUS_GIO_MASTER_ENABLE |
232 E1000_STATUS_ASDV | E1000_STATUS_MTXCKOK |
233 E1000_STATUS_SPEED_1000 | E1000_STATUS_FD |
234 E1000_STATUS_LU,
235 [MANC] = E1000_MANC_EN_MNG2HOST | E1000_MANC_RCV_TCO_EN |
236 E1000_MANC_ARP_EN | E1000_MANC_0298_EN |
237 E1000_MANC_RMCP_EN,
238 };
239
240 static void
241 set_interrupt_cause(E1000State *s, int index, uint32_t val)
242 {
243 if (val && (E1000_DEVID >= E1000_DEV_ID_82547EI_MOBILE)) {
244 /* Only for 8257x */
245 val |= E1000_ICR_INT_ASSERTED;
246 }
247 s->mac_reg[ICR] = val;
248
249 /*
250 * Make sure ICR and ICS registers have the same value.
251 * The spec says that the ICS register is write-only. However in practice,
252 * on real hardware ICS is readable, and for reads it has the same value as
253 * ICR (except that ICS does not have the clear on read behaviour of ICR).
254 *
255 * The VxWorks PRO/1000 driver uses this behaviour.
256 */
257 s->mac_reg[ICS] = val;
258
259 qemu_set_irq(s->dev.irq[0], (s->mac_reg[IMS] & s->mac_reg[ICR]) != 0);
260 }
261
262 static void
263 set_ics(E1000State *s, int index, uint32_t val)
264 {
265 DBGOUT(INTERRUPT, "set_ics %x, ICR %x, IMR %x\n", val, s->mac_reg[ICR],
266 s->mac_reg[IMS]);
267 set_interrupt_cause(s, 0, val | s->mac_reg[ICR]);
268 }
269
270 static int
271 rxbufsize(uint32_t v)
272 {
273 v &= E1000_RCTL_BSEX | E1000_RCTL_SZ_16384 | E1000_RCTL_SZ_8192 |
274 E1000_RCTL_SZ_4096 | E1000_RCTL_SZ_2048 | E1000_RCTL_SZ_1024 |
275 E1000_RCTL_SZ_512 | E1000_RCTL_SZ_256;
276 switch (v) {
277 case E1000_RCTL_BSEX | E1000_RCTL_SZ_16384:
278 return 16384;
279 case E1000_RCTL_BSEX | E1000_RCTL_SZ_8192:
280 return 8192;
281 case E1000_RCTL_BSEX | E1000_RCTL_SZ_4096:
282 return 4096;
283 case E1000_RCTL_SZ_1024:
284 return 1024;
285 case E1000_RCTL_SZ_512:
286 return 512;
287 case E1000_RCTL_SZ_256:
288 return 256;
289 }
290 return 2048;
291 }
292
293 static void e1000_reset(void *opaque)
294 {
295 E1000State *d = opaque;
296 uint8_t *macaddr = d->conf.macaddr.a;
297 int i;
298
299 qemu_del_timer(d->autoneg_timer);
300 memset(d->phy_reg, 0, sizeof d->phy_reg);
301 memmove(d->phy_reg, phy_reg_init, sizeof phy_reg_init);
302 memset(d->mac_reg, 0, sizeof d->mac_reg);
303 memmove(d->mac_reg, mac_reg_init, sizeof mac_reg_init);
304 d->rxbuf_min_shift = 1;
305 memset(&d->tx, 0, sizeof d->tx);
306
307 if (qemu_get_queue(d->nic)->link_down) {
308 e1000_link_down(d);
309 }
310
311 /* Some guests expect pre-initialized RAH/RAL (AddrValid flag + MACaddr) */
312 d->mac_reg[RA] = 0;
313 d->mac_reg[RA + 1] = E1000_RAH_AV;
314 for (i = 0; i < 4; i++) {
315 d->mac_reg[RA] |= macaddr[i] << (8 * i);
316 d->mac_reg[RA + 1] |= (i < 2) ? macaddr[i + 4] << (8 * i) : 0;
317 }
318 }
319
320 static void
321 set_ctrl(E1000State *s, int index, uint32_t val)
322 {
323 /* RST is self clearing */
324 s->mac_reg[CTRL] = val & ~E1000_CTRL_RST;
325 }
326
327 static void
328 set_rx_control(E1000State *s, int index, uint32_t val)
329 {
330 s->mac_reg[RCTL] = val;
331 s->rxbuf_size = rxbufsize(val);
332 s->rxbuf_min_shift = ((val / E1000_RCTL_RDMTS_QUAT) & 3) + 1;
333 DBGOUT(RX, "RCTL: %d, mac_reg[RCTL] = 0x%x\n", s->mac_reg[RDT],
334 s->mac_reg[RCTL]);
335 qemu_flush_queued_packets(qemu_get_queue(s->nic));
336 }
337
338 static void
339 set_mdic(E1000State *s, int index, uint32_t val)
340 {
341 uint32_t data = val & E1000_MDIC_DATA_MASK;
342 uint32_t addr = ((val & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);
343
344 if ((val & E1000_MDIC_PHY_MASK) >> E1000_MDIC_PHY_SHIFT != 1) // phy #
345 val = s->mac_reg[MDIC] | E1000_MDIC_ERROR;
346 else if (val & E1000_MDIC_OP_READ) {
347 DBGOUT(MDIC, "MDIC read reg 0x%x\n", addr);
348 if (!(phy_regcap[addr] & PHY_R)) {
349 DBGOUT(MDIC, "MDIC read reg %x unhandled\n", addr);
350 val |= E1000_MDIC_ERROR;
351 } else
352 val = (val ^ data) | s->phy_reg[addr];
353 } else if (val & E1000_MDIC_OP_WRITE) {
354 DBGOUT(MDIC, "MDIC write reg 0x%x, value 0x%x\n", addr, data);
355 if (!(phy_regcap[addr] & PHY_W)) {
356 DBGOUT(MDIC, "MDIC write reg %x unhandled\n", addr);
357 val |= E1000_MDIC_ERROR;
358 } else {
359 if (addr < NPHYWRITEOPS && phyreg_writeops[addr]) {
360 phyreg_writeops[addr](s, index, data);
361 }
362 s->phy_reg[addr] = data;
363 }
364 }
365 s->mac_reg[MDIC] = val | E1000_MDIC_READY;
366
367 if (val & E1000_MDIC_INT_EN) {
368 set_ics(s, 0, E1000_ICR_MDAC);
369 }
370 }
371
372 static uint32_t
373 get_eecd(E1000State *s, int index)
374 {
375 uint32_t ret = E1000_EECD_PRES|E1000_EECD_GNT | s->eecd_state.old_eecd;
376
377 DBGOUT(EEPROM, "reading eeprom bit %d (reading %d)\n",
378 s->eecd_state.bitnum_out, s->eecd_state.reading);
379 if (!s->eecd_state.reading ||
380 ((s->eeprom_data[(s->eecd_state.bitnum_out >> 4) & 0x3f] >>
381 ((s->eecd_state.bitnum_out & 0xf) ^ 0xf))) & 1)
382 ret |= E1000_EECD_DO;
383 return ret;
384 }
385
386 static void
387 set_eecd(E1000State *s, int index, uint32_t val)
388 {
389 uint32_t oldval = s->eecd_state.old_eecd;
390
391 s->eecd_state.old_eecd = val & (E1000_EECD_SK | E1000_EECD_CS |
392 E1000_EECD_DI|E1000_EECD_FWE_MASK|E1000_EECD_REQ);
393 if (!(E1000_EECD_CS & val)) // CS inactive; nothing to do
394 return;
395 if (E1000_EECD_CS & (val ^ oldval)) { // CS rise edge; reset state
396 s->eecd_state.val_in = 0;
397 s->eecd_state.bitnum_in = 0;
398 s->eecd_state.bitnum_out = 0;
399 s->eecd_state.reading = 0;
400 }
401 if (!(E1000_EECD_SK & (val ^ oldval))) // no clock edge
402 return;
403 if (!(E1000_EECD_SK & val)) { // falling edge
404 s->eecd_state.bitnum_out++;
405 return;
406 }
407 s->eecd_state.val_in <<= 1;
408 if (val & E1000_EECD_DI)
409 s->eecd_state.val_in |= 1;
410 if (++s->eecd_state.bitnum_in == 9 && !s->eecd_state.reading) {
411 s->eecd_state.bitnum_out = ((s->eecd_state.val_in & 0x3f)<<4)-1;
412 s->eecd_state.reading = (((s->eecd_state.val_in >> 6) & 7) ==
413 EEPROM_READ_OPCODE_MICROWIRE);
414 }
415 DBGOUT(EEPROM, "eeprom bitnum in %d out %d, reading %d\n",
416 s->eecd_state.bitnum_in, s->eecd_state.bitnum_out,
417 s->eecd_state.reading);
418 }
419
420 static uint32_t
421 flash_eerd_read(E1000State *s, int x)
422 {
423 unsigned int index, r = s->mac_reg[EERD] & ~E1000_EEPROM_RW_REG_START;
424
425 if ((s->mac_reg[EERD] & E1000_EEPROM_RW_REG_START) == 0)
426 return (s->mac_reg[EERD]);
427
428 if ((index = r >> E1000_EEPROM_RW_ADDR_SHIFT) > EEPROM_CHECKSUM_REG)
429 return (E1000_EEPROM_RW_REG_DONE | r);
430
431 return ((s->eeprom_data[index] << E1000_EEPROM_RW_REG_DATA) |
432 E1000_EEPROM_RW_REG_DONE | r);
433 }
434
435 static void
436 putsum(uint8_t *data, uint32_t n, uint32_t sloc, uint32_t css, uint32_t cse)
437 {
438 uint32_t sum;
439
440 if (cse && cse < n)
441 n = cse + 1;
442 if (sloc < n-1) {
443 sum = net_checksum_add(n-css, data+css);
444 cpu_to_be16wu((uint16_t *)(data + sloc),
445 net_checksum_finish(sum));
446 }
447 }
448
449 static inline int
450 vlan_enabled(E1000State *s)
451 {
452 return ((s->mac_reg[CTRL] & E1000_CTRL_VME) != 0);
453 }
454
455 static inline int
456 vlan_rx_filter_enabled(E1000State *s)
457 {
458 return ((s->mac_reg[RCTL] & E1000_RCTL_VFE) != 0);
459 }
460
461 static inline int
462 is_vlan_packet(E1000State *s, const uint8_t *buf)
463 {
464 return (be16_to_cpup((uint16_t *)(buf + 12)) ==
465 le16_to_cpup((uint16_t *)(s->mac_reg + VET)));
466 }
467
468 static inline int
469 is_vlan_txd(uint32_t txd_lower)
470 {
471 return ((txd_lower & E1000_TXD_CMD_VLE) != 0);
472 }
473
474 /* FCS aka Ethernet CRC-32. We don't get it from backends and can't
475 * fill it in, just pad descriptor length by 4 bytes unless guest
476 * told us to strip it off the packet. */
477 static inline int
478 fcs_len(E1000State *s)
479 {
480 return (s->mac_reg[RCTL] & E1000_RCTL_SECRC) ? 0 : 4;
481 }
482
483 static void
484 e1000_send_packet(E1000State *s, const uint8_t *buf, int size)
485 {
486 NetClientState *nc = qemu_get_queue(s->nic);
487 if (s->phy_reg[PHY_CTRL] & MII_CR_LOOPBACK) {
488 nc->info->receive(nc, buf, size);
489 } else {
490 qemu_send_packet(nc, buf, size);
491 }
492 }
493
494 static void
495 xmit_seg(E1000State *s)
496 {
497 uint16_t len, *sp;
498 unsigned int frames = s->tx.tso_frames, css, sofar, n;
499 struct e1000_tx *tp = &s->tx;
500
501 if (tp->tse && tp->cptse) {
502 css = tp->ipcss;
503 DBGOUT(TXSUM, "frames %d size %d ipcss %d\n",
504 frames, tp->size, css);
505 if (tp->ip) { // IPv4
506 cpu_to_be16wu((uint16_t *)(tp->data+css+2),
507 tp->size - css);
508 cpu_to_be16wu((uint16_t *)(tp->data+css+4),
509 be16_to_cpup((uint16_t *)(tp->data+css+4))+frames);
510 } else // IPv6
511 cpu_to_be16wu((uint16_t *)(tp->data+css+4),
512 tp->size - css);
513 css = tp->tucss;
514 len = tp->size - css;
515 DBGOUT(TXSUM, "tcp %d tucss %d len %d\n", tp->tcp, css, len);
516 if (tp->tcp) {
517 sofar = frames * tp->mss;
518 cpu_to_be32wu((uint32_t *)(tp->data+css+4), // seq
519 be32_to_cpupu((uint32_t *)(tp->data+css+4))+sofar);
520 if (tp->paylen - sofar > tp->mss)
521 tp->data[css + 13] &= ~9; // PSH, FIN
522 } else // UDP
523 cpu_to_be16wu((uint16_t *)(tp->data+css+4), len);
524 if (tp->sum_needed & E1000_TXD_POPTS_TXSM) {
525 unsigned int phsum;
526 // add pseudo-header length before checksum calculation
527 sp = (uint16_t *)(tp->data + tp->tucso);
528 phsum = be16_to_cpup(sp) + len;
529 phsum = (phsum >> 16) + (phsum & 0xffff);
530 cpu_to_be16wu(sp, phsum);
531 }
532 tp->tso_frames++;
533 }
534
535 if (tp->sum_needed & E1000_TXD_POPTS_TXSM)
536 putsum(tp->data, tp->size, tp->tucso, tp->tucss, tp->tucse);
537 if (tp->sum_needed & E1000_TXD_POPTS_IXSM)
538 putsum(tp->data, tp->size, tp->ipcso, tp->ipcss, tp->ipcse);
539 if (tp->vlan_needed) {
540 memmove(tp->vlan, tp->data, 4);
541 memmove(tp->data, tp->data + 4, 8);
542 memcpy(tp->data + 8, tp->vlan_header, 4);
543 e1000_send_packet(s, tp->vlan, tp->size + 4);
544 } else
545 e1000_send_packet(s, tp->data, tp->size);
546 s->mac_reg[TPT]++;
547 s->mac_reg[GPTC]++;
548 n = s->mac_reg[TOTL];
549 if ((s->mac_reg[TOTL] += s->tx.size) < n)
550 s->mac_reg[TOTH]++;
551 }
552
553 static void
554 process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
555 {
556 uint32_t txd_lower = le32_to_cpu(dp->lower.data);
557 uint32_t dtype = txd_lower & (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D);
558 unsigned int split_size = txd_lower & 0xffff, bytes, sz, op;
559 unsigned int msh = 0xfffff, hdr = 0;
560 uint64_t addr;
561 struct e1000_context_desc *xp = (struct e1000_context_desc *)dp;
562 struct e1000_tx *tp = &s->tx;
563
564 if (dtype == E1000_TXD_CMD_DEXT) { // context descriptor
565 op = le32_to_cpu(xp->cmd_and_length);
566 tp->ipcss = xp->lower_setup.ip_fields.ipcss;
567 tp->ipcso = xp->lower_setup.ip_fields.ipcso;
568 tp->ipcse = le16_to_cpu(xp->lower_setup.ip_fields.ipcse);
569 tp->tucss = xp->upper_setup.tcp_fields.tucss;
570 tp->tucso = xp->upper_setup.tcp_fields.tucso;
571 tp->tucse = le16_to_cpu(xp->upper_setup.tcp_fields.tucse);
572 tp->paylen = op & 0xfffff;
573 tp->hdr_len = xp->tcp_seg_setup.fields.hdr_len;
574 tp->mss = le16_to_cpu(xp->tcp_seg_setup.fields.mss);
575 tp->ip = (op & E1000_TXD_CMD_IP) ? 1 : 0;
576 tp->tcp = (op & E1000_TXD_CMD_TCP) ? 1 : 0;
577 tp->tse = (op & E1000_TXD_CMD_TSE) ? 1 : 0;
578 tp->tso_frames = 0;
579 if (tp->tucso == 0) { // this is probably wrong
580 DBGOUT(TXSUM, "TCP/UDP: cso 0!\n");
581 tp->tucso = tp->tucss + (tp->tcp ? 16 : 6);
582 }
583 return;
584 } else if (dtype == (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D)) {
585 // data descriptor
586 if (tp->size == 0) {
587 tp->sum_needed = le32_to_cpu(dp->upper.data) >> 8;
588 }
589 tp->cptse = ( txd_lower & E1000_TXD_CMD_TSE ) ? 1 : 0;
590 } else {
591 // legacy descriptor
592 tp->cptse = 0;
593 }
594
595 if (vlan_enabled(s) && is_vlan_txd(txd_lower) &&
596 (tp->cptse || txd_lower & E1000_TXD_CMD_EOP)) {
597 tp->vlan_needed = 1;
598 cpu_to_be16wu((uint16_t *)(tp->vlan_header),
599 le16_to_cpup((uint16_t *)(s->mac_reg + VET)));
600 cpu_to_be16wu((uint16_t *)(tp->vlan_header + 2),
601 le16_to_cpu(dp->upper.fields.special));
602 }
603
604 addr = le64_to_cpu(dp->buffer_addr);
605 if (tp->tse && tp->cptse) {
606 hdr = tp->hdr_len;
607 msh = hdr + tp->mss;
608 do {
609 bytes = split_size;
610 if (tp->size + bytes > msh)
611 bytes = msh - tp->size;
612
613 bytes = MIN(sizeof(tp->data) - tp->size, bytes);
614 pci_dma_read(&s->dev, addr, tp->data + tp->size, bytes);
615 if ((sz = tp->size + bytes) >= hdr && tp->size < hdr)
616 memmove(tp->header, tp->data, hdr);
617 tp->size = sz;
618 addr += bytes;
619 if (sz == msh) {
620 xmit_seg(s);
621 memmove(tp->data, tp->header, hdr);
622 tp->size = hdr;
623 }
624 } while (split_size -= bytes);
625 } else if (!tp->tse && tp->cptse) {
626 // context descriptor TSE is not set, while data descriptor TSE is set
627 DBGOUT(TXERR, "TCP segmentation error\n");
628 } else {
629 split_size = MIN(sizeof(tp->data) - tp->size, split_size);
630 pci_dma_read(&s->dev, addr, tp->data + tp->size, split_size);
631 tp->size += split_size;
632 }
633
634 if (!(txd_lower & E1000_TXD_CMD_EOP))
635 return;
636 if (!(tp->tse && tp->cptse && tp->size < hdr))
637 xmit_seg(s);
638 tp->tso_frames = 0;
639 tp->sum_needed = 0;
640 tp->vlan_needed = 0;
641 tp->size = 0;
642 tp->cptse = 0;
643 }
644
645 static uint32_t
646 txdesc_writeback(E1000State *s, dma_addr_t base, struct e1000_tx_desc *dp)
647 {
648 uint32_t txd_upper, txd_lower = le32_to_cpu(dp->lower.data);
649
650 if (!(txd_lower & (E1000_TXD_CMD_RS|E1000_TXD_CMD_RPS)))
651 return 0;
652 txd_upper = (le32_to_cpu(dp->upper.data) | E1000_TXD_STAT_DD) &
653 ~(E1000_TXD_STAT_EC | E1000_TXD_STAT_LC | E1000_TXD_STAT_TU);
654 dp->upper.data = cpu_to_le32(txd_upper);
655 pci_dma_write(&s->dev, base + ((char *)&dp->upper - (char *)dp),
656 &dp->upper, sizeof(dp->upper));
657 return E1000_ICR_TXDW;
658 }
659
660 static uint64_t tx_desc_base(E1000State *s)
661 {
662 uint64_t bah = s->mac_reg[TDBAH];
663 uint64_t bal = s->mac_reg[TDBAL] & ~0xf;
664
665 return (bah << 32) + bal;
666 }
667
668 static void
669 start_xmit(E1000State *s)
670 {
671 dma_addr_t base;
672 struct e1000_tx_desc desc;
673 uint32_t tdh_start = s->mac_reg[TDH], cause = E1000_ICS_TXQE;
674
675 if (!(s->mac_reg[TCTL] & E1000_TCTL_EN)) {
676 DBGOUT(TX, "tx disabled\n");
677 return;
678 }
679
680 while (s->mac_reg[TDH] != s->mac_reg[TDT]) {
681 base = tx_desc_base(s) +
682 sizeof(struct e1000_tx_desc) * s->mac_reg[TDH];
683 pci_dma_read(&s->dev, base, &desc, sizeof(desc));
684
685 DBGOUT(TX, "index %d: %p : %x %x\n", s->mac_reg[TDH],
686 (void *)(intptr_t)desc.buffer_addr, desc.lower.data,
687 desc.upper.data);
688
689 process_tx_desc(s, &desc);
690 cause |= txdesc_writeback(s, base, &desc);
691
692 if (++s->mac_reg[TDH] * sizeof(desc) >= s->mac_reg[TDLEN])
693 s->mac_reg[TDH] = 0;
694 /*
695 * the following could happen only if guest sw assigns
696 * bogus values to TDT/TDLEN.
697 * there's nothing too intelligent we could do about this.
698 */
699 if (s->mac_reg[TDH] == tdh_start) {
700 DBGOUT(TXERR, "TDH wraparound @%x, TDT %x, TDLEN %x\n",
701 tdh_start, s->mac_reg[TDT], s->mac_reg[TDLEN]);
702 break;
703 }
704 }
705 set_ics(s, 0, cause);
706 }
707
708 static int
709 receive_filter(E1000State *s, const uint8_t *buf, int size)
710 {
711 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
712 static const int mta_shift[] = {4, 3, 2, 0};
713 uint32_t f, rctl = s->mac_reg[RCTL], ra[2], *rp;
714
715 if (is_vlan_packet(s, buf) && vlan_rx_filter_enabled(s)) {
716 uint16_t vid = be16_to_cpup((uint16_t *)(buf + 14));
717 uint32_t vfta = le32_to_cpup((uint32_t *)(s->mac_reg + VFTA) +
718 ((vid >> 5) & 0x7f));
719 if ((vfta & (1 << (vid & 0x1f))) == 0)
720 return 0;
721 }
722
723 if (rctl & E1000_RCTL_UPE) // promiscuous
724 return 1;
725
726 if ((buf[0] & 1) && (rctl & E1000_RCTL_MPE)) // promiscuous mcast
727 return 1;
728
729 if ((rctl & E1000_RCTL_BAM) && !memcmp(buf, bcast, sizeof bcast))
730 return 1;
731
732 for (rp = s->mac_reg + RA; rp < s->mac_reg + RA + 32; rp += 2) {
733 if (!(rp[1] & E1000_RAH_AV))
734 continue;
735 ra[0] = cpu_to_le32(rp[0]);
736 ra[1] = cpu_to_le32(rp[1]);
737 if (!memcmp(buf, (uint8_t *)ra, 6)) {
738 DBGOUT(RXFILTER,
739 "unicast match[%d]: %02x:%02x:%02x:%02x:%02x:%02x\n",
740 (int)(rp - s->mac_reg - RA)/2,
741 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
742 return 1;
743 }
744 }
745 DBGOUT(RXFILTER, "unicast mismatch: %02x:%02x:%02x:%02x:%02x:%02x\n",
746 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
747
748 f = mta_shift[(rctl >> E1000_RCTL_MO_SHIFT) & 3];
749 f = (((buf[5] << 8) | buf[4]) >> f) & 0xfff;
750 if (s->mac_reg[MTA + (f >> 5)] & (1 << (f & 0x1f)))
751 return 1;
752 DBGOUT(RXFILTER,
753 "dropping, inexact filter mismatch: %02x:%02x:%02x:%02x:%02x:%02x MO %d MTA[%d] %x\n",
754 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
755 (rctl >> E1000_RCTL_MO_SHIFT) & 3, f >> 5,
756 s->mac_reg[MTA + (f >> 5)]);
757
758 return 0;
759 }
760
761 static void
762 e1000_set_link_status(NetClientState *nc)
763 {
764 E1000State *s = qemu_get_nic_opaque(nc);
765 uint32_t old_status = s->mac_reg[STATUS];
766
767 if (nc->link_down) {
768 e1000_link_down(s);
769 } else {
770 e1000_link_up(s);
771 }
772
773 if (s->mac_reg[STATUS] != old_status)
774 set_ics(s, 0, E1000_ICR_LSC);
775 }
776
777 static bool e1000_has_rxbufs(E1000State *s, size_t total_size)
778 {
779 int bufs;
780 /* Fast-path short packets */
781 if (total_size <= s->rxbuf_size) {
782 return s->mac_reg[RDH] != s->mac_reg[RDT];
783 }
784 if (s->mac_reg[RDH] < s->mac_reg[RDT]) {
785 bufs = s->mac_reg[RDT] - s->mac_reg[RDH];
786 } else if (s->mac_reg[RDH] > s->mac_reg[RDT]) {
787 bufs = s->mac_reg[RDLEN] / sizeof(struct e1000_rx_desc) +
788 s->mac_reg[RDT] - s->mac_reg[RDH];
789 } else {
790 return false;
791 }
792 return total_size <= bufs * s->rxbuf_size;
793 }
794
795 static int
796 e1000_can_receive(NetClientState *nc)
797 {
798 E1000State *s = qemu_get_nic_opaque(nc);
799
800 return (s->mac_reg[STATUS] & E1000_STATUS_LU) &&
801 (s->mac_reg[RCTL] & E1000_RCTL_EN) && e1000_has_rxbufs(s, 1);
802 }
803
804 static uint64_t rx_desc_base(E1000State *s)
805 {
806 uint64_t bah = s->mac_reg[RDBAH];
807 uint64_t bal = s->mac_reg[RDBAL] & ~0xf;
808
809 return (bah << 32) + bal;
810 }
811
812 static ssize_t
813 e1000_receive(NetClientState *nc, const uint8_t *buf, size_t size)
814 {
815 E1000State *s = qemu_get_nic_opaque(nc);
816 struct e1000_rx_desc desc;
817 dma_addr_t base;
818 unsigned int n, rdt;
819 uint32_t rdh_start;
820 uint16_t vlan_special = 0;
821 uint8_t vlan_status = 0, vlan_offset = 0;
822 uint8_t min_buf[MIN_BUF_SIZE];
823 size_t desc_offset;
824 size_t desc_size;
825 size_t total_size;
826
827 if (!(s->mac_reg[STATUS] & E1000_STATUS_LU)) {
828 return -1;
829 }
830
831 if (!(s->mac_reg[RCTL] & E1000_RCTL_EN)) {
832 return -1;
833 }
834
835 /* Pad to minimum Ethernet frame length */
836 if (size < sizeof(min_buf)) {
837 memcpy(min_buf, buf, size);
838 memset(&min_buf[size], 0, sizeof(min_buf) - size);
839 buf = min_buf;
840 size = sizeof(min_buf);
841 }
842
843 /* Discard oversized packets if !LPE and !SBP. */
844 if ((size > MAXIMUM_ETHERNET_LPE_SIZE ||
845 (size > MAXIMUM_ETHERNET_VLAN_SIZE
846 && !(s->mac_reg[RCTL] & E1000_RCTL_LPE)))
847 && !(s->mac_reg[RCTL] & E1000_RCTL_SBP)) {
848 return size;
849 }
850
851 if (!receive_filter(s, buf, size))
852 return size;
853
854 if (vlan_enabled(s) && is_vlan_packet(s, buf)) {
855 vlan_special = cpu_to_le16(be16_to_cpup((uint16_t *)(buf + 14)));
856 memmove((uint8_t *)buf + 4, buf, 12);
857 vlan_status = E1000_RXD_STAT_VP;
858 vlan_offset = 4;
859 size -= 4;
860 }
861
862 rdh_start = s->mac_reg[RDH];
863 desc_offset = 0;
864 total_size = size + fcs_len(s);
865 if (!e1000_has_rxbufs(s, total_size)) {
866 set_ics(s, 0, E1000_ICS_RXO);
867 return -1;
868 }
869 do {
870 desc_size = total_size - desc_offset;
871 if (desc_size > s->rxbuf_size) {
872 desc_size = s->rxbuf_size;
873 }
874 base = rx_desc_base(s) + sizeof(desc) * s->mac_reg[RDH];
875 pci_dma_read(&s->dev, base, &desc, sizeof(desc));
876 desc.special = vlan_special;
877 desc.status |= (vlan_status | E1000_RXD_STAT_DD);
878 if (desc.buffer_addr) {
879 if (desc_offset < size) {
880 size_t copy_size = size - desc_offset;
881 if (copy_size > s->rxbuf_size) {
882 copy_size = s->rxbuf_size;
883 }
884 pci_dma_write(&s->dev, le64_to_cpu(desc.buffer_addr),
885 buf + desc_offset + vlan_offset, copy_size);
886 }
887 desc_offset += desc_size;
888 desc.length = cpu_to_le16(desc_size);
889 if (desc_offset >= total_size) {
890 desc.status |= E1000_RXD_STAT_EOP | E1000_RXD_STAT_IXSM;
891 } else {
892 /* Guest zeroing out status is not a hardware requirement.
893 Clear EOP in case guest didn't do it. */
894 desc.status &= ~E1000_RXD_STAT_EOP;
895 }
896 } else { // as per intel docs; skip descriptors with null buf addr
897 DBGOUT(RX, "Null RX descriptor!!\n");
898 }
899 pci_dma_write(&s->dev, base, &desc, sizeof(desc));
900
901 if (++s->mac_reg[RDH] * sizeof(desc) >= s->mac_reg[RDLEN])
902 s->mac_reg[RDH] = 0;
903 /* see comment in start_xmit; same here */
904 if (s->mac_reg[RDH] == rdh_start) {
905 DBGOUT(RXERR, "RDH wraparound @%x, RDT %x, RDLEN %x\n",
906 rdh_start, s->mac_reg[RDT], s->mac_reg[RDLEN]);
907 set_ics(s, 0, E1000_ICS_RXO);
908 return -1;
909 }
910 } while (desc_offset < total_size);
911
912 s->mac_reg[GPRC]++;
913 s->mac_reg[TPR]++;
914 /* TOR - Total Octets Received:
915 * This register includes bytes received in a packet from the <Destination
916 * Address> field through the <CRC> field, inclusively.
917 */
918 n = s->mac_reg[TORL] + size + /* Always include FCS length. */ 4;
919 if (n < s->mac_reg[TORL])
920 s->mac_reg[TORH]++;
921 s->mac_reg[TORL] = n;
922
923 n = E1000_ICS_RXT0;
924 if ((rdt = s->mac_reg[RDT]) < s->mac_reg[RDH])
925 rdt += s->mac_reg[RDLEN] / sizeof(desc);
926 if (((rdt - s->mac_reg[RDH]) * sizeof(desc)) <= s->mac_reg[RDLEN] >>
927 s->rxbuf_min_shift)
928 n |= E1000_ICS_RXDMT0;
929
930 set_ics(s, 0, n);
931
932 return size;
933 }
934
935 static uint32_t
936 mac_readreg(E1000State *s, int index)
937 {
938 return s->mac_reg[index];
939 }
940
941 static uint32_t
942 mac_icr_read(E1000State *s, int index)
943 {
944 uint32_t ret = s->mac_reg[ICR];
945
946 DBGOUT(INTERRUPT, "ICR read: %x\n", ret);
947 set_interrupt_cause(s, 0, 0);
948 return ret;
949 }
950
951 static uint32_t
952 mac_read_clr4(E1000State *s, int index)
953 {
954 uint32_t ret = s->mac_reg[index];
955
956 s->mac_reg[index] = 0;
957 return ret;
958 }
959
960 static uint32_t
961 mac_read_clr8(E1000State *s, int index)
962 {
963 uint32_t ret = s->mac_reg[index];
964
965 s->mac_reg[index] = 0;
966 s->mac_reg[index-1] = 0;
967 return ret;
968 }
969
970 static void
971 mac_writereg(E1000State *s, int index, uint32_t val)
972 {
973 s->mac_reg[index] = val;
974 }
975
976 static void
977 set_rdt(E1000State *s, int index, uint32_t val)
978 {
979 s->mac_reg[index] = val & 0xffff;
980 if (e1000_has_rxbufs(s, 1)) {
981 qemu_flush_queued_packets(qemu_get_queue(s->nic));
982 }
983 }
984
985 static void
986 set_16bit(E1000State *s, int index, uint32_t val)
987 {
988 s->mac_reg[index] = val & 0xffff;
989 }
990
991 static void
992 set_dlen(E1000State *s, int index, uint32_t val)
993 {
994 s->mac_reg[index] = val & 0xfff80;
995 }
996
997 static void
998 set_tctl(E1000State *s, int index, uint32_t val)
999 {
1000 s->mac_reg[index] = val;
1001 s->mac_reg[TDT] &= 0xffff;
1002 start_xmit(s);
1003 }
1004
1005 static void
1006 set_icr(E1000State *s, int index, uint32_t val)
1007 {
1008 DBGOUT(INTERRUPT, "set_icr %x\n", val);
1009 set_interrupt_cause(s, 0, s->mac_reg[ICR] & ~val);
1010 }
1011
1012 static void
1013 set_imc(E1000State *s, int index, uint32_t val)
1014 {
1015 s->mac_reg[IMS] &= ~val;
1016 set_ics(s, 0, 0);
1017 }
1018
1019 static void
1020 set_ims(E1000State *s, int index, uint32_t val)
1021 {
1022 s->mac_reg[IMS] |= val;
1023 set_ics(s, 0, 0);
1024 }
1025
1026 #define getreg(x) [x] = mac_readreg
1027 static uint32_t (*macreg_readops[])(E1000State *, int) = {
1028 getreg(PBA), getreg(RCTL), getreg(TDH), getreg(TXDCTL),
1029 getreg(WUFC), getreg(TDT), getreg(CTRL), getreg(LEDCTL),
1030 getreg(MANC), getreg(MDIC), getreg(SWSM), getreg(STATUS),
1031 getreg(TORL), getreg(TOTL), getreg(IMS), getreg(TCTL),
1032 getreg(RDH), getreg(RDT), getreg(VET), getreg(ICS),
1033 getreg(TDBAL), getreg(TDBAH), getreg(RDBAH), getreg(RDBAL),
1034 getreg(TDLEN), getreg(RDLEN),
1035
1036 [TOTH] = mac_read_clr8, [TORH] = mac_read_clr8, [GPRC] = mac_read_clr4,
1037 [GPTC] = mac_read_clr4, [TPR] = mac_read_clr4, [TPT] = mac_read_clr4,
1038 [ICR] = mac_icr_read, [EECD] = get_eecd, [EERD] = flash_eerd_read,
1039 [CRCERRS ... MPC] = &mac_readreg,
1040 [RA ... RA+31] = &mac_readreg,
1041 [MTA ... MTA+127] = &mac_readreg,
1042 [VFTA ... VFTA+127] = &mac_readreg,
1043 };
1044 enum { NREADOPS = ARRAY_SIZE(macreg_readops) };
1045
1046 #define putreg(x) [x] = mac_writereg
1047 static void (*macreg_writeops[])(E1000State *, int, uint32_t) = {
1048 putreg(PBA), putreg(EERD), putreg(SWSM), putreg(WUFC),
1049 putreg(TDBAL), putreg(TDBAH), putreg(TXDCTL), putreg(RDBAH),
1050 putreg(RDBAL), putreg(LEDCTL), putreg(VET),
1051 [TDLEN] = set_dlen, [RDLEN] = set_dlen, [TCTL] = set_tctl,
1052 [TDT] = set_tctl, [MDIC] = set_mdic, [ICS] = set_ics,
1053 [TDH] = set_16bit, [RDH] = set_16bit, [RDT] = set_rdt,
1054 [IMC] = set_imc, [IMS] = set_ims, [ICR] = set_icr,
1055 [EECD] = set_eecd, [RCTL] = set_rx_control, [CTRL] = set_ctrl,
1056 [RA ... RA+31] = &mac_writereg,
1057 [MTA ... MTA+127] = &mac_writereg,
1058 [VFTA ... VFTA+127] = &mac_writereg,
1059 };
1060
1061 enum { NWRITEOPS = ARRAY_SIZE(macreg_writeops) };
1062
1063 static void
1064 e1000_mmio_write(void *opaque, hwaddr addr, uint64_t val,
1065 unsigned size)
1066 {
1067 E1000State *s = opaque;
1068 unsigned int index = (addr & 0x1ffff) >> 2;
1069
1070 if (index < NWRITEOPS && macreg_writeops[index]) {
1071 macreg_writeops[index](s, index, val);
1072 } else if (index < NREADOPS && macreg_readops[index]) {
1073 DBGOUT(MMIO, "e1000_mmio_writel RO %x: 0x%04"PRIx64"\n", index<<2, val);
1074 } else {
1075 DBGOUT(UNKNOWN, "MMIO unknown write addr=0x%08x,val=0x%08"PRIx64"\n",
1076 index<<2, val);
1077 }
1078 }
1079
1080 static uint64_t
1081 e1000_mmio_read(void *opaque, hwaddr addr, unsigned size)
1082 {
1083 E1000State *s = opaque;
1084 unsigned int index = (addr & 0x1ffff) >> 2;
1085
1086 if (index < NREADOPS && macreg_readops[index])
1087 {
1088 return macreg_readops[index](s, index);
1089 }
1090 DBGOUT(UNKNOWN, "MMIO unknown read addr=0x%08x\n", index<<2);
1091 return 0;
1092 }
1093
1094 static const MemoryRegionOps e1000_mmio_ops = {
1095 .read = e1000_mmio_read,
1096 .write = e1000_mmio_write,
1097 .endianness = DEVICE_LITTLE_ENDIAN,
1098 .impl = {
1099 .min_access_size = 4,
1100 .max_access_size = 4,
1101 },
1102 };
1103
1104 static uint64_t e1000_io_read(void *opaque, hwaddr addr,
1105 unsigned size)
1106 {
1107 E1000State *s = opaque;
1108
1109 (void)s;
1110 return 0;
1111 }
1112
1113 static void e1000_io_write(void *opaque, hwaddr addr,
1114 uint64_t val, unsigned size)
1115 {
1116 E1000State *s = opaque;
1117
1118 (void)s;
1119 }
1120
1121 static const MemoryRegionOps e1000_io_ops = {
1122 .read = e1000_io_read,
1123 .write = e1000_io_write,
1124 .endianness = DEVICE_LITTLE_ENDIAN,
1125 };
1126
1127 static bool is_version_1(void *opaque, int version_id)
1128 {
1129 return version_id == 1;
1130 }
1131
1132 static void e1000_pre_save(void *opaque)
1133 {
1134 E1000State *s = opaque;
1135 NetClientState *nc = qemu_get_queue(s->nic);
1136
1137 if (!(s->compat_flags & E1000_FLAG_AUTONEG)) {
1138 return;
1139 }
1140
1141 /*
1142 * If link is down and auto-negotiation is ongoing, complete
1143 * auto-negotiation immediately. This allows is to look at
1144 * MII_SR_AUTONEG_COMPLETE to infer link status on load.
1145 */
1146 if (nc->link_down &&
1147 s->phy_reg[PHY_CTRL] & MII_CR_AUTO_NEG_EN &&
1148 s->phy_reg[PHY_CTRL] & MII_CR_RESTART_AUTO_NEG) {
1149 s->phy_reg[PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE;
1150 }
1151 }
1152
1153 static int e1000_post_load(void *opaque, int version_id)
1154 {
1155 E1000State *s = opaque;
1156 NetClientState *nc = qemu_get_queue(s->nic);
1157
1158 /* nc.link_down can't be migrated, so infer link_down according
1159 * to link status bit in mac_reg[STATUS].
1160 * Alternatively, restart link negotiation if it was in progress. */
1161 nc->link_down = (s->mac_reg[STATUS] & E1000_STATUS_LU) == 0;
1162
1163 if (!(s->compat_flags & E1000_FLAG_AUTONEG)) {
1164 return 0;
1165 }
1166
1167 if (s->phy_reg[PHY_CTRL] & MII_CR_AUTO_NEG_EN &&
1168 s->phy_reg[PHY_CTRL] & MII_CR_RESTART_AUTO_NEG &&
1169 !(s->phy_reg[PHY_STATUS] & MII_SR_AUTONEG_COMPLETE)) {
1170 nc->link_down = false;
1171 qemu_mod_timer(s->autoneg_timer, qemu_get_clock_ms(vm_clock) + 500);
1172 }
1173
1174 return 0;
1175 }
1176
1177 static const VMStateDescription vmstate_e1000 = {
1178 .name = "e1000",
1179 .version_id = 2,
1180 .minimum_version_id = 1,
1181 .minimum_version_id_old = 1,
1182 .pre_save = e1000_pre_save,
1183 .post_load = e1000_post_load,
1184 .fields = (VMStateField []) {
1185 VMSTATE_PCI_DEVICE(dev, E1000State),
1186 VMSTATE_UNUSED_TEST(is_version_1, 4), /* was instance id */
1187 VMSTATE_UNUSED(4), /* Was mmio_base. */
1188 VMSTATE_UINT32(rxbuf_size, E1000State),
1189 VMSTATE_UINT32(rxbuf_min_shift, E1000State),
1190 VMSTATE_UINT32(eecd_state.val_in, E1000State),
1191 VMSTATE_UINT16(eecd_state.bitnum_in, E1000State),
1192 VMSTATE_UINT16(eecd_state.bitnum_out, E1000State),
1193 VMSTATE_UINT16(eecd_state.reading, E1000State),
1194 VMSTATE_UINT32(eecd_state.old_eecd, E1000State),
1195 VMSTATE_UINT8(tx.ipcss, E1000State),
1196 VMSTATE_UINT8(tx.ipcso, E1000State),
1197 VMSTATE_UINT16(tx.ipcse, E1000State),
1198 VMSTATE_UINT8(tx.tucss, E1000State),
1199 VMSTATE_UINT8(tx.tucso, E1000State),
1200 VMSTATE_UINT16(tx.tucse, E1000State),
1201 VMSTATE_UINT32(tx.paylen, E1000State),
1202 VMSTATE_UINT8(tx.hdr_len, E1000State),
1203 VMSTATE_UINT16(tx.mss, E1000State),
1204 VMSTATE_UINT16(tx.size, E1000State),
1205 VMSTATE_UINT16(tx.tso_frames, E1000State),
1206 VMSTATE_UINT8(tx.sum_needed, E1000State),
1207 VMSTATE_INT8(tx.ip, E1000State),
1208 VMSTATE_INT8(tx.tcp, E1000State),
1209 VMSTATE_BUFFER(tx.header, E1000State),
1210 VMSTATE_BUFFER(tx.data, E1000State),
1211 VMSTATE_UINT16_ARRAY(eeprom_data, E1000State, 64),
1212 VMSTATE_UINT16_ARRAY(phy_reg, E1000State, 0x20),
1213 VMSTATE_UINT32(mac_reg[CTRL], E1000State),
1214 VMSTATE_UINT32(mac_reg[EECD], E1000State),
1215 VMSTATE_UINT32(mac_reg[EERD], E1000State),
1216 VMSTATE_UINT32(mac_reg[GPRC], E1000State),
1217 VMSTATE_UINT32(mac_reg[GPTC], E1000State),
1218 VMSTATE_UINT32(mac_reg[ICR], E1000State),
1219 VMSTATE_UINT32(mac_reg[ICS], E1000State),
1220 VMSTATE_UINT32(mac_reg[IMC], E1000State),
1221 VMSTATE_UINT32(mac_reg[IMS], E1000State),
1222 VMSTATE_UINT32(mac_reg[LEDCTL], E1000State),
1223 VMSTATE_UINT32(mac_reg[MANC], E1000State),
1224 VMSTATE_UINT32(mac_reg[MDIC], E1000State),
1225 VMSTATE_UINT32(mac_reg[MPC], E1000State),
1226 VMSTATE_UINT32(mac_reg[PBA], E1000State),
1227 VMSTATE_UINT32(mac_reg[RCTL], E1000State),
1228 VMSTATE_UINT32(mac_reg[RDBAH], E1000State),
1229 VMSTATE_UINT32(mac_reg[RDBAL], E1000State),
1230 VMSTATE_UINT32(mac_reg[RDH], E1000State),
1231 VMSTATE_UINT32(mac_reg[RDLEN], E1000State),
1232 VMSTATE_UINT32(mac_reg[RDT], E1000State),
1233 VMSTATE_UINT32(mac_reg[STATUS], E1000State),
1234 VMSTATE_UINT32(mac_reg[SWSM], E1000State),
1235 VMSTATE_UINT32(mac_reg[TCTL], E1000State),
1236 VMSTATE_UINT32(mac_reg[TDBAH], E1000State),
1237 VMSTATE_UINT32(mac_reg[TDBAL], E1000State),
1238 VMSTATE_UINT32(mac_reg[TDH], E1000State),
1239 VMSTATE_UINT32(mac_reg[TDLEN], E1000State),
1240 VMSTATE_UINT32(mac_reg[TDT], E1000State),
1241 VMSTATE_UINT32(mac_reg[TORH], E1000State),
1242 VMSTATE_UINT32(mac_reg[TORL], E1000State),
1243 VMSTATE_UINT32(mac_reg[TOTH], E1000State),
1244 VMSTATE_UINT32(mac_reg[TOTL], E1000State),
1245 VMSTATE_UINT32(mac_reg[TPR], E1000State),
1246 VMSTATE_UINT32(mac_reg[TPT], E1000State),
1247 VMSTATE_UINT32(mac_reg[TXDCTL], E1000State),
1248 VMSTATE_UINT32(mac_reg[WUFC], E1000State),
1249 VMSTATE_UINT32(mac_reg[VET], E1000State),
1250 VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, RA, 32),
1251 VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, MTA, 128),
1252 VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, VFTA, 128),
1253 VMSTATE_END_OF_LIST()
1254 }
1255 };
1256
1257 static const uint16_t e1000_eeprom_template[64] = {
1258 0x0000, 0x0000, 0x0000, 0x0000, 0xffff, 0x0000, 0x0000, 0x0000,
1259 0x3000, 0x1000, 0x6403, E1000_DEVID, 0x8086, E1000_DEVID, 0x8086, 0x3040,
1260 0x0008, 0x2000, 0x7e14, 0x0048, 0x1000, 0x00d8, 0x0000, 0x2700,
1261 0x6cc9, 0x3150, 0x0722, 0x040b, 0x0984, 0x0000, 0xc000, 0x0706,
1262 0x1008, 0x0000, 0x0f04, 0x7fff, 0x4d01, 0xffff, 0xffff, 0xffff,
1263 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
1264 0x0100, 0x4000, 0x121c, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
1265 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0x0000,
1266 };
1267
1268 /* PCI interface */
1269
1270 static void
1271 e1000_mmio_setup(E1000State *d)
1272 {
1273 int i;
1274 const uint32_t excluded_regs[] = {
1275 E1000_MDIC, E1000_ICR, E1000_ICS, E1000_IMS,
1276 E1000_IMC, E1000_TCTL, E1000_TDT, PNPMMIO_SIZE
1277 };
1278
1279 memory_region_init_io(&d->mmio, &e1000_mmio_ops, d, "e1000-mmio",
1280 PNPMMIO_SIZE);
1281 memory_region_add_coalescing(&d->mmio, 0, excluded_regs[0]);
1282 for (i = 0; excluded_regs[i] != PNPMMIO_SIZE; i++)
1283 memory_region_add_coalescing(&d->mmio, excluded_regs[i] + 4,
1284 excluded_regs[i+1] - excluded_regs[i] - 4);
1285 memory_region_init_io(&d->io, &e1000_io_ops, d, "e1000-io", IOPORT_SIZE);
1286 }
1287
1288 static void
1289 e1000_cleanup(NetClientState *nc)
1290 {
1291 E1000State *s = qemu_get_nic_opaque(nc);
1292
1293 s->nic = NULL;
1294 }
1295
1296 static void
1297 pci_e1000_uninit(PCIDevice *dev)
1298 {
1299 E1000State *d = DO_UPCAST(E1000State, dev, dev);
1300
1301 qemu_del_timer(d->autoneg_timer);
1302 qemu_free_timer(d->autoneg_timer);
1303 memory_region_destroy(&d->mmio);
1304 memory_region_destroy(&d->io);
1305 qemu_del_nic(d->nic);
1306 }
1307
1308 static NetClientInfo net_e1000_info = {
1309 .type = NET_CLIENT_OPTIONS_KIND_NIC,
1310 .size = sizeof(NICState),
1311 .can_receive = e1000_can_receive,
1312 .receive = e1000_receive,
1313 .cleanup = e1000_cleanup,
1314 .link_status_changed = e1000_set_link_status,
1315 };
1316
1317 static int pci_e1000_init(PCIDevice *pci_dev)
1318 {
1319 E1000State *d = DO_UPCAST(E1000State, dev, pci_dev);
1320 uint8_t *pci_conf;
1321 uint16_t checksum = 0;
1322 int i;
1323 uint8_t *macaddr;
1324
1325 pci_conf = d->dev.config;
1326
1327 /* TODO: RST# value should be 0, PCI spec 6.2.4 */
1328 pci_conf[PCI_CACHE_LINE_SIZE] = 0x10;
1329
1330 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
1331
1332 e1000_mmio_setup(d);
1333
1334 pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
1335
1336 pci_register_bar(&d->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->io);
1337
1338 memmove(d->eeprom_data, e1000_eeprom_template,
1339 sizeof e1000_eeprom_template);
1340 qemu_macaddr_default_if_unset(&d->conf.macaddr);
1341 macaddr = d->conf.macaddr.a;
1342 for (i = 0; i < 3; i++)
1343 d->eeprom_data[i] = (macaddr[2*i+1]<<8) | macaddr[2*i];
1344 for (i = 0; i < EEPROM_CHECKSUM_REG; i++)
1345 checksum += d->eeprom_data[i];
1346 checksum = (uint16_t) EEPROM_SUM - checksum;
1347 d->eeprom_data[EEPROM_CHECKSUM_REG] = checksum;
1348
1349 d->nic = qemu_new_nic(&net_e1000_info, &d->conf,
1350 object_get_typename(OBJECT(d)), d->dev.qdev.id, d);
1351
1352 qemu_format_nic_info_str(qemu_get_queue(d->nic), macaddr);
1353
1354 add_boot_device_path(d->conf.bootindex, &pci_dev->qdev, "/ethernet-phy@0");
1355
1356 d->autoneg_timer = qemu_new_timer_ms(vm_clock, e1000_autoneg_timer, d);
1357
1358 return 0;
1359 }
1360
1361 static void qdev_e1000_reset(DeviceState *dev)
1362 {
1363 E1000State *d = DO_UPCAST(E1000State, dev.qdev, dev);
1364 e1000_reset(d);
1365 }
1366
1367 static Property e1000_properties[] = {
1368 DEFINE_NIC_PROPERTIES(E1000State, conf),
1369 DEFINE_PROP_BIT("autonegotiation", E1000State,
1370 compat_flags, E1000_FLAG_AUTONEG_BIT, true),
1371 DEFINE_PROP_END_OF_LIST(),
1372 };
1373
1374 static void e1000_class_init(ObjectClass *klass, void *data)
1375 {
1376 DeviceClass *dc = DEVICE_CLASS(klass);
1377 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1378
1379 k->init = pci_e1000_init;
1380 k->exit = pci_e1000_uninit;
1381 k->romfile = "pxe-e1000.rom";
1382 k->vendor_id = PCI_VENDOR_ID_INTEL;
1383 k->device_id = E1000_DEVID;
1384 k->revision = 0x03;
1385 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
1386 dc->desc = "Intel Gigabit Ethernet";
1387 dc->reset = qdev_e1000_reset;
1388 dc->vmsd = &vmstate_e1000;
1389 dc->props = e1000_properties;
1390 }
1391
1392 static const TypeInfo e1000_info = {
1393 .name = "e1000",
1394 .parent = TYPE_PCI_DEVICE,
1395 .instance_size = sizeof(E1000State),
1396 .class_init = e1000_class_init,
1397 };
1398
1399 static void e1000_register_types(void)
1400 {
1401 type_register_static(&e1000_info);
1402 }
1403
1404 type_init(e1000_register_types)
Qemu with PowerPC KVM improvements