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32 ******************************************************************************/
33 /*$FreeBSD: releng/9.0/sys/dev/e1000/e1000_vf.c 218530 2011-02-11 01:00:26Z jfv $*/
34
35
36 #include "e1000_api.h"
37
38
39 static s32 e1000_init_phy_params_vf(struct e1000_hw *hw);
40 static s32 e1000_init_nvm_params_vf(struct e1000_hw *hw);
41 static void e1000_release_vf(struct e1000_hw *hw);
42 static s32 e1000_acquire_vf(struct e1000_hw *hw);
43 static s32 e1000_setup_link_vf(struct e1000_hw *hw);
44 static s32 e1000_get_bus_info_pcie_vf(struct e1000_hw *hw);
45 static s32 e1000_init_mac_params_vf(struct e1000_hw *hw);
46 static s32 e1000_check_for_link_vf(struct e1000_hw *hw);
47 static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
48 u16 *duplex);
49 static s32 e1000_init_hw_vf(struct e1000_hw *hw);
50 static s32 e1000_reset_hw_vf(struct e1000_hw *hw);
51 static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *, u32);
52 static void e1000_rar_set_vf(struct e1000_hw *, u8 *, u32);
53 static s32 e1000_read_mac_addr_vf(struct e1000_hw *);
54
55 /**
56 * e1000_init_phy_params_vf - Inits PHY params
57 * @hw: pointer to the HW structure
58 *
59 * Doesn't do much - there's no PHY available to the VF.
60 **/
61 static s32 e1000_init_phy_params_vf(struct e1000_hw *hw)
62 {
63 DEBUGFUNC("e1000_init_phy_params_vf");
64 hw->phy.type = e1000_phy_vf;
65 hw->phy.ops.acquire = e1000_acquire_vf;
66 hw->phy.ops.release = e1000_release_vf;
67
68 return E1000_SUCCESS;
69 }
70
71 /**
72 * e1000_init_nvm_params_vf - Inits NVM params
73 * @hw: pointer to the HW structure
74 *
75 * Doesn't do much - there's no NVM available to the VF.
76 **/
77 static s32 e1000_init_nvm_params_vf(struct e1000_hw *hw)
78 {
79 DEBUGFUNC("e1000_init_nvm_params_vf");
80 hw->nvm.type = e1000_nvm_none;
81 hw->nvm.ops.acquire = e1000_acquire_vf;
82 hw->nvm.ops.release = e1000_release_vf;
83
84 return E1000_SUCCESS;
85 }
86
87 /**
88 * e1000_init_mac_params_vf - Inits MAC params
89 * @hw: pointer to the HW structure
90 **/
91 static s32 e1000_init_mac_params_vf(struct e1000_hw *hw)
92 {
93 struct e1000_mac_info *mac = &hw->mac;
94
95 DEBUGFUNC("e1000_init_mac_params_vf");
96
97 /* Set media type */
98 /*
99 * Virtual functions don't care what they're media type is as they
100 * have no direct access to the PHY, or the media. That is handled
101 * by the physical function driver.
102 */
103 hw->phy.media_type = e1000_media_type_unknown;
104
105 /* No ASF features for the VF driver */
106 mac->asf_firmware_present = FALSE;
107 /* ARC subsystem not supported */
108 mac->arc_subsystem_valid = FALSE;
109 /* Disable adaptive IFS mode so the generic funcs don't do anything */
110 mac->adaptive_ifs = FALSE;
111 /* VF's have no MTA Registers - PF feature only */
112 mac->mta_reg_count = 128;
113 /* VF's have no access to RAR entries */
114 mac->rar_entry_count = 1;
115
116 /* Function pointers */
117 /* link setup */
118 mac->ops.setup_link = e1000_setup_link_vf;
119 /* bus type/speed/width */
120 mac->ops.get_bus_info = e1000_get_bus_info_pcie_vf;
121 /* reset */
122 mac->ops.reset_hw = e1000_reset_hw_vf;
123 /* hw initialization */
124 mac->ops.init_hw = e1000_init_hw_vf;
125 /* check for link */
126 mac->ops.check_for_link = e1000_check_for_link_vf;
127 /* link info */
128 mac->ops.get_link_up_info = e1000_get_link_up_info_vf;
129 /* multicast address update */
130 mac->ops.update_mc_addr_list = e1000_update_mc_addr_list_vf;
131 /* set mac address */
132 mac->ops.rar_set = e1000_rar_set_vf;
133 /* read mac address */
134 mac->ops.read_mac_addr = e1000_read_mac_addr_vf;
135
136
137 return E1000_SUCCESS;
138 }
139
140 /**
141 * e1000_init_function_pointers_vf - Inits function pointers
142 * @hw: pointer to the HW structure
143 **/
144 void e1000_init_function_pointers_vf(struct e1000_hw *hw)
145 {
146 DEBUGFUNC("e1000_init_function_pointers_vf");
147
148 hw->mac.ops.init_params = e1000_init_mac_params_vf;
149 hw->nvm.ops.init_params = e1000_init_nvm_params_vf;
150 hw->phy.ops.init_params = e1000_init_phy_params_vf;
151 hw->mbx.ops.init_params = e1000_init_mbx_params_vf;
152 }
153
154 /**
155 * e1000_acquire_vf - Acquire rights to access PHY or NVM.
156 * @hw: pointer to the HW structure
157 *
158 * There is no PHY or NVM so we want all attempts to acquire these to fail.
159 * In addition, the MAC registers to access PHY/NVM don't exist so we don't
160 * even want any SW to attempt to use them.
161 **/
162 static s32 e1000_acquire_vf(struct e1000_hw *hw)
163 {
164 return -E1000_ERR_PHY;
165 }
166
167 /**
168 * e1000_release_vf - Release PHY or NVM
169 * @hw: pointer to the HW structure
170 *
171 * There is no PHY or NVM so we want all attempts to acquire these to fail.
172 * In addition, the MAC registers to access PHY/NVM don't exist so we don't
173 * even want any SW to attempt to use them.
174 **/
175 static void e1000_release_vf(struct e1000_hw *hw)
176 {
177 return;
178 }
179
180 /**
181 * e1000_setup_link_vf - Sets up link.
182 * @hw: pointer to the HW structure
183 *
184 * Virtual functions cannot change link.
185 **/
186 static s32 e1000_setup_link_vf(struct e1000_hw *hw)
187 {
188 DEBUGFUNC("e1000_setup_link_vf");
189
190 return E1000_SUCCESS;
191 }
192
193 /**
194 * e1000_get_bus_info_pcie_vf - Gets the bus info.
195 * @hw: pointer to the HW structure
196 *
197 * Virtual functions are not really on their own bus.
198 **/
199 static s32 e1000_get_bus_info_pcie_vf(struct e1000_hw *hw)
200 {
201 struct e1000_bus_info *bus = &hw->bus;
202
203 DEBUGFUNC("e1000_get_bus_info_pcie_vf");
204
205 /* Do not set type PCI-E because we don't want disable master to run */
206 bus->type = e1000_bus_type_reserved;
207 bus->speed = e1000_bus_speed_2500;
208
209 return 0;
210 }
211
212 /**
213 * e1000_get_link_up_info_vf - Gets link info.
214 * @hw: pointer to the HW structure
215 * @speed: pointer to 16 bit value to store link speed.
216 * @duplex: pointer to 16 bit value to store duplex.
217 *
218 * Since we cannot read the PHY and get accurate link info, we must rely upon
219 * the status register's data which is often stale and inaccurate.
220 **/
221 static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
222 u16 *duplex)
223 {
224 s32 status;
225
226 DEBUGFUNC("e1000_get_link_up_info_vf");
227
228 status = E1000_READ_REG(hw, E1000_STATUS);
229 if (status & E1000_STATUS_SPEED_1000) {
230 *speed = SPEED_1000;
231 DEBUGOUT("1000 Mbs, ");
232 } else if (status & E1000_STATUS_SPEED_100) {
233 *speed = SPEED_100;
234 DEBUGOUT("100 Mbs, ");
235 } else {
236 *speed = SPEED_10;
237 DEBUGOUT("10 Mbs, ");
238 }
239
240 if (status & E1000_STATUS_FD) {
241 *duplex = FULL_DUPLEX;
242 DEBUGOUT("Full Duplex\n");
243 } else {
244 *duplex = HALF_DUPLEX;
245 DEBUGOUT("Half Duplex\n");
246 }
247
248 return E1000_SUCCESS;
249 }
250
251 /**
252 * e1000_reset_hw_vf - Resets the HW
253 * @hw: pointer to the HW structure
254 *
255 * VF's provide a function level reset. This is done using bit 26 of ctrl_reg.
256 * This is all the reset we can perform on a VF.
257 **/
258 static s32 e1000_reset_hw_vf(struct e1000_hw *hw)
259 {
260 struct e1000_mbx_info *mbx = &hw->mbx;
261 u32 timeout = E1000_VF_INIT_TIMEOUT;
262 s32 ret_val = -E1000_ERR_MAC_INIT;
263 u32 ctrl, msgbuf[3];
264 u8 *addr = (u8 *)(&msgbuf[1]);
265
266 DEBUGFUNC("e1000_reset_hw_vf");
267
268 DEBUGOUT("Issuing a function level reset to MAC\n");
269 ctrl = E1000_READ_REG(hw, E1000_CTRL);
270 E1000_WRITE_REG(hw, E1000_CTRL, ctrl | E1000_CTRL_RST);
271
272 /* we cannot reset while the RSTI / RSTD bits are asserted */
273 while (!mbx->ops.check_for_rst(hw, 0) && timeout) {
274 timeout--;
275 usec_delay(5);
276 }
277
278 if (timeout) {
279 /* mailbox timeout can now become active */
280 mbx->timeout = E1000_VF_MBX_INIT_TIMEOUT;
281
282 msgbuf[0] = E1000_VF_RESET;
283 mbx->ops.write_posted(hw, msgbuf, 1, 0);
284
285 msec_delay(10);
286
287 /* set our "perm_addr" based on info provided by PF */
288 ret_val = mbx->ops.read_posted(hw, msgbuf, 3, 0);
289 if (!ret_val) {
290 if (msgbuf[0] == (E1000_VF_RESET |
291 E1000_VT_MSGTYPE_ACK))
292 memcpy(hw->mac.perm_addr, addr, 6);
293 else
294 ret_val = -E1000_ERR_MAC_INIT;
295 }
296 }
297
298 return ret_val;
299 }
300
301 /**
302 * e1000_init_hw_vf - Inits the HW
303 * @hw: pointer to the HW structure
304 *
305 * Not much to do here except clear the PF Reset indication if there is one.
306 **/
307 static s32 e1000_init_hw_vf(struct e1000_hw *hw)
308 {
309 DEBUGFUNC("e1000_init_hw_vf");
310
311 /* attempt to set and restore our mac address */
312 e1000_rar_set_vf(hw, hw->mac.addr, 0);
313
314 return E1000_SUCCESS;
315 }
316
317 /**
318 * e1000_rar_set_vf - set device MAC address
319 * @hw: pointer to the HW structure
320 * @addr: pointer to the receive address
321 * @index receive address array register
322 **/
323 static void e1000_rar_set_vf(struct e1000_hw *hw, u8 * addr, u32 index)
324 {
325 struct e1000_mbx_info *mbx = &hw->mbx;
326 u32 msgbuf[3];
327 u8 *msg_addr = (u8 *)(&msgbuf[1]);
328 s32 ret_val;
329
330 memset(msgbuf, 0, 12);
331 msgbuf[0] = E1000_VF_SET_MAC_ADDR;
332 memcpy(msg_addr, addr, 6);
333 ret_val = mbx->ops.write_posted(hw, msgbuf, 3, 0);
334
335 if (!ret_val)
336 ret_val = mbx->ops.read_posted(hw, msgbuf, 3, 0);
337
338 msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
339
340 /* if nacked the address was rejected, use "perm_addr" */
341 if (!ret_val &&
342 (msgbuf[0] == (E1000_VF_SET_MAC_ADDR | E1000_VT_MSGTYPE_NACK)))
343 e1000_read_mac_addr_vf(hw);
344 }
345
346 /**
347 * e1000_hash_mc_addr_vf - Generate a multicast hash value
348 * @hw: pointer to the HW structure
349 * @mc_addr: pointer to a multicast address
350 *
351 * Generates a multicast address hash value which is used to determine
352 * the multicast filter table array address and new table value.
353 **/
354 static u32 e1000_hash_mc_addr_vf(struct e1000_hw *hw, u8 *mc_addr)
355 {
356 u32 hash_value, hash_mask;
357 u8 bit_shift = 0;
358
359 DEBUGFUNC("e1000_hash_mc_addr_generic");
360
361 /* Register count multiplied by bits per register */
362 hash_mask = (hw->mac.mta_reg_count * 32) - 1;
363
364 /*
365 * The bit_shift is the number of left-shifts
366 * where 0xFF would still fall within the hash mask.
367 */
368 while (hash_mask >> bit_shift != 0xFF)
369 bit_shift++;
370
371 hash_value = hash_mask & (((mc_addr[4] >> (8 - bit_shift)) |
372 (((u16) mc_addr[5]) << bit_shift)));
373
374 return hash_value;
375 }
376
377 /**
378 * e1000_update_mc_addr_list_vf - Update Multicast addresses
379 * @hw: pointer to the HW structure
380 * @mc_addr_list: array of multicast addresses to program
381 * @mc_addr_count: number of multicast addresses to program
382 *
383 * Updates the Multicast Table Array.
384 * The caller must have a packed mc_addr_list of multicast addresses.
385 **/
386 void e1000_update_mc_addr_list_vf(struct e1000_hw *hw,
387 u8 *mc_addr_list, u32 mc_addr_count)
388 {
389 struct e1000_mbx_info *mbx = &hw->mbx;
390 u32 msgbuf[E1000_VFMAILBOX_SIZE];
391 u16 *hash_list = (u16 *)&msgbuf[1];
392 u32 hash_value;
393 u32 i;
394
395 DEBUGFUNC("e1000_update_mc_addr_list_vf");
396
397 /* Each entry in the list uses 1 16 bit word. We have 30
398 * 16 bit words available in our HW msg buffer (minus 1 for the
399 * msg type). That's 30 hash values if we pack 'em right. If
400 * there are more than 30 MC addresses to add then punt the
401 * extras for now and then add code to handle more than 30 later.
402 * It would be unusual for a server to request that many multi-cast
403 * addresses except for in large enterprise network environments.
404 */
405
406 DEBUGOUT1("MC Addr Count = %d\n", mc_addr_count);
407
408 if (mc_addr_count > 30) {
409 msgbuf[0] |= E1000_VF_SET_MULTICAST_OVERFLOW;
410 mc_addr_count = 30;
411 }
412
413 msgbuf[0] = E1000_VF_SET_MULTICAST;
414 msgbuf[0] |= mc_addr_count << E1000_VT_MSGINFO_SHIFT;
415
416 for (i = 0; i < mc_addr_count; i++) {
417 hash_value = e1000_hash_mc_addr_vf(hw, mc_addr_list);
418 DEBUGOUT1("Hash value = 0x%03X\n", hash_value);
419 hash_list[i] = hash_value & 0x0FFF;
420 mc_addr_list += ETH_ADDR_LEN;
421 }
422
423 mbx->ops.write_posted(hw, msgbuf, E1000_VFMAILBOX_SIZE, 0);
424 }
425
426 /**
427 * e1000_vfta_set_vf - Set/Unset vlan filter table address
428 * @hw: pointer to the HW structure
429 * @vid: determines the vfta register and bit to set/unset
430 * @set: if TRUE then set bit, else clear bit
431 **/
432 void e1000_vfta_set_vf(struct e1000_hw *hw, u16 vid, bool set)
433 {
434 struct e1000_mbx_info *mbx = &hw->mbx;
435 u32 msgbuf[2];
436
437 msgbuf[0] = E1000_VF_SET_VLAN;
438 msgbuf[1] = vid;
439 /* Setting the 8 bit field MSG INFO to TRUE indicates "add" */
440 if (set)
441 msgbuf[0] |= E1000_VF_SET_VLAN_ADD;
442
443 mbx->ops.write_posted(hw, msgbuf, 2, 0);
444 }
445
446 /** e1000_rlpml_set_vf - Set the maximum receive packet length
447 * @hw: pointer to the HW structure
448 * @max_size: value to assign to max frame size
449 **/
450 void e1000_rlpml_set_vf(struct e1000_hw *hw, u16 max_size)
451 {
452 struct e1000_mbx_info *mbx = &hw->mbx;
453 u32 msgbuf[2];
454
455 msgbuf[0] = E1000_VF_SET_LPE;
456 msgbuf[1] = max_size;
457
458 mbx->ops.write_posted(hw, msgbuf, 2, 0);
459 }
460
461 /**
462 * e1000_promisc_set_vf - Set flags for Unicast or Multicast promisc
463 * @hw: pointer to the HW structure
464 * @uni: boolean indicating unicast promisc status
465 * @multi: boolean indicating multicast promisc status
466 **/
467 s32 e1000_promisc_set_vf(struct e1000_hw *hw, enum e1000_promisc_type type)
468 {
469 struct e1000_mbx_info *mbx = &hw->mbx;
470 u32 msgbuf = E1000_VF_SET_PROMISC;
471 s32 ret_val;
472
473 switch (type) {
474 case e1000_promisc_multicast:
475 msgbuf |= E1000_VF_SET_PROMISC_MULTICAST;
476 break;
477 case e1000_promisc_enabled:
478 msgbuf |= E1000_VF_SET_PROMISC_MULTICAST;
479 case e1000_promisc_unicast:
480 msgbuf |= E1000_VF_SET_PROMISC_UNICAST;
481 case e1000_promisc_disabled:
482 break;
483 default:
484 return -E1000_ERR_MAC_INIT;
485 }
486
487 ret_val = mbx->ops.write_posted(hw, &msgbuf, 1, 0);
488
489 if (!ret_val)
490 ret_val = mbx->ops.read_posted(hw, &msgbuf, 1, 0);
491
492 if (!ret_val && !(msgbuf & E1000_VT_MSGTYPE_ACK))
493 ret_val = -E1000_ERR_MAC_INIT;
494
495 return ret_val;
496 }
497
498 /**
499 * e1000_read_mac_addr_vf - Read device MAC address
500 * @hw: pointer to the HW structure
501 **/
502 static s32 e1000_read_mac_addr_vf(struct e1000_hw *hw)
503 {
504 int i;
505
506 for (i = 0; i < ETH_ADDR_LEN; i++)
507 hw->mac.addr[i] = hw->mac.perm_addr[i];
508
509 return E1000_SUCCESS;
510 }
511
512 /**
513 * e1000_check_for_link_vf - Check for link for a virtual interface
514 * @hw: pointer to the HW structure
515 *
516 * Checks to see if the underlying PF is still talking to the VF and
517 * if it is then it reports the link state to the hardware, otherwise
518 * it reports link down and returns an error.
519 **/
520 static s32 e1000_check_for_link_vf(struct e1000_hw *hw)
521 {
522 struct e1000_mbx_info *mbx = &hw->mbx;
523 struct e1000_mac_info *mac = &hw->mac;
524 s32 ret_val = E1000_SUCCESS;
525 u32 in_msg = 0;
526
527 DEBUGFUNC("e1000_check_for_link_vf");
528
529 /*
530 * We only want to run this if there has been a rst asserted.
531 * in this case that could mean a link change, device reset,
532 * or a virtual function reset
533 */
534
535 /* If we were hit with a reset or timeout drop the link */
536 if (!mbx->ops.check_for_rst(hw, 0) || !mbx->timeout)
537 mac->get_link_status = TRUE;
538
539 if (!mac->get_link_status)
540 goto out;
541
542 /* if link status is down no point in checking to see if pf is up */
543 if (!(E1000_READ_REG(hw, E1000_STATUS) & E1000_STATUS_LU))
544 goto out;
545
546 /* if the read failed it could just be a mailbox collision, best wait
547 * until we are called again and don't report an error */
548 if (mbx->ops.read(hw, &in_msg, 1, 0))
549 goto out;
550
551 /* if incoming message isn't clear to send we are waiting on response */
552 if (!(in_msg & E1000_VT_MSGTYPE_CTS)) {
553 /* message is not CTS and is NACK we have lost CTS status */
554 if (in_msg & E1000_VT_MSGTYPE_NACK)
555 ret_val = -E1000_ERR_MAC_INIT;
556 goto out;
557 }
558
559 /* at this point we know the PF is talking to us, check and see if
560 * we are still accepting timeout or if we had a timeout failure.
561 * if we failed then we will need to reinit */
562 if (!mbx->timeout) {
563 ret_val = -E1000_ERR_MAC_INIT;
564 goto out;
565 }
566
567 /* if we passed all the tests above then the link is up and we no
568 * longer need to check for link */
569 mac->get_link_status = FALSE;
570
571 out:
572 return ret_val;
573 }
574
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