1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2001-2020 Intel Corporation
3 */
4
5 #include "igc_api.h"
6 #include "igc_manage.h"
7
8 /**
9 * igc_calculate_checksum - Calculate checksum for buffer
10 * @buffer: pointer to EEPROM
11 * @length: size of EEPROM to calculate a checksum for
12 *
13 * Calculates the checksum for some buffer on a specified length. The
14 * checksum calculated is returned.
15 **/
igc_calculate_checksum(u8 * buffer,u32 length)16 u8 igc_calculate_checksum(u8 *buffer, u32 length)
17 {
18 u32 i;
19 u8 sum = 0;
20
21 DEBUGFUNC("igc_calculate_checksum");
22
23 if (!buffer)
24 return 0;
25
26 for (i = 0; i < length; i++)
27 sum += buffer[i];
28
29 return (u8)(0 - sum);
30 }
31
32 /**
33 * igc_mng_enable_host_if_generic - Checks host interface is enabled
34 * @hw: pointer to the HW structure
35 *
36 * Returns IGC_success upon success, else IGC_ERR_HOST_INTERFACE_COMMAND
37 *
38 * This function checks whether the HOST IF is enabled for command operation
39 * and also checks whether the previous command is completed. It busy waits
40 * in case of previous command is not completed.
41 **/
igc_mng_enable_host_if_generic(struct igc_hw * hw)42 s32 igc_mng_enable_host_if_generic(struct igc_hw *hw)
43 {
44 u32 hicr;
45 u8 i;
46
47 DEBUGFUNC("igc_mng_enable_host_if_generic");
48
49 if (!hw->mac.arc_subsystem_valid) {
50 DEBUGOUT("ARC subsystem not valid.\n");
51 return -IGC_ERR_HOST_INTERFACE_COMMAND;
52 }
53
54 /* Check that the host interface is enabled. */
55 hicr = IGC_READ_REG(hw, IGC_HICR);
56 if (!(hicr & IGC_HICR_EN)) {
57 DEBUGOUT("IGC_HOST_EN bit disabled.\n");
58 return -IGC_ERR_HOST_INTERFACE_COMMAND;
59 }
60 /* check the previous command is completed */
61 for (i = 0; i < IGC_MNG_DHCP_COMMAND_TIMEOUT; i++) {
62 hicr = IGC_READ_REG(hw, IGC_HICR);
63 if (!(hicr & IGC_HICR_C))
64 break;
65 msec_delay_irq(1);
66 }
67
68 if (i == IGC_MNG_DHCP_COMMAND_TIMEOUT) {
69 DEBUGOUT("Previous command timeout failed .\n");
70 return -IGC_ERR_HOST_INTERFACE_COMMAND;
71 }
72
73 return IGC_SUCCESS;
74 }
75
76 /**
77 * igc_check_mng_mode_generic - Generic check management mode
78 * @hw: pointer to the HW structure
79 *
80 * Reads the firmware semaphore register and returns true (>0) if
81 * manageability is enabled, else false (0).
82 **/
igc_check_mng_mode_generic(struct igc_hw * hw)83 bool igc_check_mng_mode_generic(struct igc_hw *hw)
84 {
85 u32 fwsm = IGC_READ_REG(hw, IGC_FWSM);
86
87 DEBUGFUNC("igc_check_mng_mode_generic");
88
89
90 return (fwsm & IGC_FWSM_MODE_MASK) ==
91 (IGC_MNG_IAMT_MODE << IGC_FWSM_MODE_SHIFT);
92 }
93
94 /**
95 * igc_enable_tx_pkt_filtering_generic - Enable packet filtering on Tx
96 * @hw: pointer to the HW structure
97 *
98 * Enables packet filtering on transmit packets if manageability is enabled
99 * and host interface is enabled.
100 **/
igc_enable_tx_pkt_filtering_generic(struct igc_hw * hw)101 bool igc_enable_tx_pkt_filtering_generic(struct igc_hw *hw)
102 {
103 struct igc_host_mng_dhcp_cookie *hdr = &hw->mng_cookie;
104 u32 *buffer = (u32 *)&hw->mng_cookie;
105 u32 offset;
106 s32 ret_val, hdr_csum, csum;
107 u8 i, len;
108
109 DEBUGFUNC("igc_enable_tx_pkt_filtering_generic");
110
111 hw->mac.tx_pkt_filtering = true;
112
113 /* No manageability, no filtering */
114 if (!hw->mac.ops.check_mng_mode(hw)) {
115 hw->mac.tx_pkt_filtering = false;
116 return hw->mac.tx_pkt_filtering;
117 }
118
119 /* If we can't read from the host interface for whatever
120 * reason, disable filtering.
121 */
122 ret_val = igc_mng_enable_host_if_generic(hw);
123 if (ret_val != IGC_SUCCESS) {
124 hw->mac.tx_pkt_filtering = false;
125 return hw->mac.tx_pkt_filtering;
126 }
127
128 /* Read in the header. Length and offset are in dwords. */
129 len = IGC_MNG_DHCP_COOKIE_LENGTH >> 2;
130 offset = IGC_MNG_DHCP_COOKIE_OFFSET >> 2;
131 for (i = 0; i < len; i++)
132 *(buffer + i) = IGC_READ_REG_ARRAY_DWORD(hw, IGC_HOST_IF,
133 offset + i);
134 hdr_csum = hdr->checksum;
135 hdr->checksum = 0;
136 csum = igc_calculate_checksum((u8 *)hdr,
137 IGC_MNG_DHCP_COOKIE_LENGTH);
138 /* If either the checksums or signature don't match, then
139 * the cookie area isn't considered valid, in which case we
140 * take the safe route of assuming Tx filtering is enabled.
141 */
142 if (hdr_csum != csum || hdr->signature != IGC_IAMT_SIGNATURE) {
143 hw->mac.tx_pkt_filtering = true;
144 return hw->mac.tx_pkt_filtering;
145 }
146
147 /* Cookie area is valid, make the final check for filtering. */
148 if (!(hdr->status & IGC_MNG_DHCP_COOKIE_STATUS_PARSING))
149 hw->mac.tx_pkt_filtering = false;
150
151 return hw->mac.tx_pkt_filtering;
152 }
153
154 /**
155 * igc_mng_write_cmd_header_generic - Writes manageability command header
156 * @hw: pointer to the HW structure
157 * @hdr: pointer to the host interface command header
158 *
159 * Writes the command header after does the checksum calculation.
160 **/
igc_mng_write_cmd_header_generic(struct igc_hw * hw,struct igc_host_mng_command_header * hdr)161 s32 igc_mng_write_cmd_header_generic(struct igc_hw *hw,
162 struct igc_host_mng_command_header *hdr)
163 {
164 u16 i, length = sizeof(struct igc_host_mng_command_header);
165
166 DEBUGFUNC("igc_mng_write_cmd_header_generic");
167
168 /* Write the whole command header structure with new checksum. */
169
170 hdr->checksum = igc_calculate_checksum((u8 *)hdr, length);
171
172 length >>= 2;
173 /* Write the relevant command block into the ram area. */
174 for (i = 0; i < length; i++) {
175 IGC_WRITE_REG_ARRAY_DWORD(hw, IGC_HOST_IF, i,
176 *((u32 *)hdr + i));
177 IGC_WRITE_FLUSH(hw);
178 }
179
180 return IGC_SUCCESS;
181 }
182
183 /**
184 * igc_mng_host_if_write_generic - Write to the manageability host interface
185 * @hw: pointer to the HW structure
186 * @buffer: pointer to the host interface buffer
187 * @length: size of the buffer
188 * @offset: location in the buffer to write to
189 * @sum: sum of the data (not checksum)
190 *
191 * This function writes the buffer content at the offset given on the host if.
192 * It also does alignment considerations to do the writes in most efficient
193 * way. Also fills up the sum of the buffer in *buffer parameter.
194 **/
igc_mng_host_if_write_generic(struct igc_hw * hw,u8 * buffer,u16 length,u16 offset,u8 * sum)195 s32 igc_mng_host_if_write_generic(struct igc_hw *hw, u8 *buffer,
196 u16 length, u16 offset, u8 *sum)
197 {
198 u8 *tmp;
199 u8 *bufptr = buffer;
200 u32 data = 0;
201 u16 remaining, i, j, prev_bytes;
202
203 DEBUGFUNC("igc_mng_host_if_write_generic");
204
205 /* sum = only sum of the data and it is not checksum */
206
207 if (length == 0 || offset + length > IGC_HI_MAX_MNG_DATA_LENGTH)
208 return -IGC_ERR_PARAM;
209
210 tmp = (u8 *)&data;
211 prev_bytes = offset & 0x3;
212 offset >>= 2;
213
214 if (prev_bytes) {
215 data = IGC_READ_REG_ARRAY_DWORD(hw, IGC_HOST_IF, offset);
216 for (j = prev_bytes; j < sizeof(u32); j++) {
217 *(tmp + j) = *bufptr++;
218 *sum += *(tmp + j);
219 }
220 IGC_WRITE_REG_ARRAY_DWORD(hw, IGC_HOST_IF, offset, data);
221 length -= j - prev_bytes;
222 offset++;
223 }
224
225 remaining = length & 0x3;
226 length -= remaining;
227
228 /* Calculate length in DWORDs */
229 length >>= 2;
230
231 /* The device driver writes the relevant command block into the
232 * ram area.
233 */
234 for (i = 0; i < length; i++) {
235 for (j = 0; j < sizeof(u32); j++) {
236 *(tmp + j) = *bufptr++;
237 *sum += *(tmp + j);
238 }
239
240 IGC_WRITE_REG_ARRAY_DWORD(hw, IGC_HOST_IF, offset + i,
241 data);
242 }
243 if (remaining) {
244 for (j = 0; j < sizeof(u32); j++) {
245 if (j < remaining)
246 *(tmp + j) = *bufptr++;
247 else
248 *(tmp + j) = 0;
249
250 *sum += *(tmp + j);
251 }
252 IGC_WRITE_REG_ARRAY_DWORD(hw, IGC_HOST_IF, offset + i,
253 data);
254 }
255
256 return IGC_SUCCESS;
257 }
258
259 /**
260 * igc_mng_write_dhcp_info_generic - Writes DHCP info to host interface
261 * @hw: pointer to the HW structure
262 * @buffer: pointer to the host interface
263 * @length: size of the buffer
264 *
265 * Writes the DHCP information to the host interface.
266 **/
igc_mng_write_dhcp_info_generic(struct igc_hw * hw,u8 * buffer,u16 length)267 s32 igc_mng_write_dhcp_info_generic(struct igc_hw *hw, u8 *buffer,
268 u16 length)
269 {
270 struct igc_host_mng_command_header hdr;
271 s32 ret_val;
272 u32 hicr;
273
274 DEBUGFUNC("igc_mng_write_dhcp_info_generic");
275
276 hdr.command_id = IGC_MNG_DHCP_TX_PAYLOAD_CMD;
277 hdr.command_length = length;
278 hdr.reserved1 = 0;
279 hdr.reserved2 = 0;
280 hdr.checksum = 0;
281
282 /* Enable the host interface */
283 ret_val = igc_mng_enable_host_if_generic(hw);
284 if (ret_val)
285 return ret_val;
286
287 /* Populate the host interface with the contents of "buffer". */
288 ret_val = igc_mng_host_if_write_generic(hw, buffer, length,
289 sizeof(hdr), &hdr.checksum);
290 if (ret_val)
291 return ret_val;
292
293 /* Write the manageability command header */
294 ret_val = igc_mng_write_cmd_header_generic(hw, &hdr);
295 if (ret_val)
296 return ret_val;
297
298 /* Tell the ARC a new command is pending. */
299 hicr = IGC_READ_REG(hw, IGC_HICR);
300 IGC_WRITE_REG(hw, IGC_HICR, hicr | IGC_HICR_C);
301
302 return IGC_SUCCESS;
303 }
304
305 /**
306 * igc_enable_mng_pass_thru - Check if management passthrough is needed
307 * @hw: pointer to the HW structure
308 *
309 * Verifies the hardware needs to leave interface enabled so that frames can
310 * be directed to and from the management interface.
311 **/
igc_enable_mng_pass_thru(struct igc_hw * hw)312 bool igc_enable_mng_pass_thru(struct igc_hw *hw)
313 {
314 u32 manc;
315 u32 fwsm, factps;
316
317 DEBUGFUNC("igc_enable_mng_pass_thru");
318
319 if (!hw->mac.asf_firmware_present)
320 return false;
321
322 manc = IGC_READ_REG(hw, IGC_MANC);
323
324 if (!(manc & IGC_MANC_RCV_TCO_EN))
325 return false;
326
327 if (hw->mac.has_fwsm) {
328 fwsm = IGC_READ_REG(hw, IGC_FWSM);
329 factps = IGC_READ_REG(hw, IGC_FACTPS);
330
331 if (!(factps & IGC_FACTPS_MNGCG) &&
332 ((fwsm & IGC_FWSM_MODE_MASK) ==
333 (igc_mng_mode_pt << IGC_FWSM_MODE_SHIFT)))
334 return true;
335 } else if ((hw->mac.type == igc_82574) ||
336 (hw->mac.type == igc_82583)) {
337 u16 data;
338 s32 ret_val;
339
340 factps = IGC_READ_REG(hw, IGC_FACTPS);
341 ret_val = igc_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &data);
342 if (ret_val)
343 return false;
344
345 if (!(factps & IGC_FACTPS_MNGCG) &&
346 ((data & IGC_NVM_INIT_CTRL2_MNGM) ==
347 (igc_mng_mode_pt << 13)))
348 return true;
349 } else if ((manc & IGC_MANC_SMBUS_EN) &&
350 !(manc & IGC_MANC_ASF_EN)) {
351 return true;
352 }
353
354 return false;
355 }
356
357 /**
358 * igc_host_interface_command - Writes buffer to host interface
359 * @hw: pointer to the HW structure
360 * @buffer: contains a command to write
361 * @length: the byte length of the buffer, must be multiple of 4 bytes
362 *
363 * Writes a buffer to the Host Interface. Upon success, returns IGC_SUCCESS
364 * else returns IGC_ERR_HOST_INTERFACE_COMMAND.
365 **/
igc_host_interface_command(struct igc_hw * hw,u8 * buffer,u32 length)366 s32 igc_host_interface_command(struct igc_hw *hw, u8 *buffer, u32 length)
367 {
368 u32 hicr, i;
369
370 DEBUGFUNC("igc_host_interface_command");
371
372 if (!(hw->mac.arc_subsystem_valid)) {
373 DEBUGOUT("Hardware doesn't support host interface command.\n");
374 return IGC_SUCCESS;
375 }
376
377 if (!hw->mac.asf_firmware_present) {
378 DEBUGOUT("Firmware is not present.\n");
379 return IGC_SUCCESS;
380 }
381
382 if (length == 0 || length & 0x3 ||
383 length > IGC_HI_MAX_BLOCK_BYTE_LENGTH) {
384 DEBUGOUT("Buffer length failure.\n");
385 return -IGC_ERR_HOST_INTERFACE_COMMAND;
386 }
387
388 /* Check that the host interface is enabled. */
389 hicr = IGC_READ_REG(hw, IGC_HICR);
390 if (!(hicr & IGC_HICR_EN)) {
391 DEBUGOUT("IGC_HOST_EN bit disabled.\n");
392 return -IGC_ERR_HOST_INTERFACE_COMMAND;
393 }
394
395 /* Calculate length in DWORDs */
396 length >>= 2;
397
398 /* The device driver writes the relevant command block
399 * into the ram area.
400 */
401 for (i = 0; i < length; i++)
402 IGC_WRITE_REG_ARRAY_DWORD(hw, IGC_HOST_IF, i,
403 *((u32 *)buffer + i));
404
405 /* Setting this bit tells the ARC that a new command is pending. */
406 IGC_WRITE_REG(hw, IGC_HICR, hicr | IGC_HICR_C);
407
408 for (i = 0; i < IGC_HI_COMMAND_TIMEOUT; i++) {
409 hicr = IGC_READ_REG(hw, IGC_HICR);
410 if (!(hicr & IGC_HICR_C))
411 break;
412 msec_delay(1);
413 }
414
415 /* Check command successful completion. */
416 if (i == IGC_HI_COMMAND_TIMEOUT ||
417 (!(IGC_READ_REG(hw, IGC_HICR) & IGC_HICR_SV))) {
418 DEBUGOUT("Command has failed with no status valid.\n");
419 return -IGC_ERR_HOST_INTERFACE_COMMAND;
420 }
421
422 for (i = 0; i < length; i++)
423 *((u32 *)buffer + i) = IGC_READ_REG_ARRAY_DWORD(hw,
424 IGC_HOST_IF,
425 i);
426
427 return IGC_SUCCESS;
428 }
429
430 /**
431 * igc_load_firmware - Writes proxy FW code buffer to host interface
432 * and execute.
433 * @hw: pointer to the HW structure
434 * @buffer: contains a firmware to write
435 * @length: the byte length of the buffer, must be multiple of 4 bytes
436 *
437 * Upon success returns IGC_SUCCESS, returns IGC_ERR_CONFIG if not enabled
438 * in HW else returns IGC_ERR_HOST_INTERFACE_COMMAND.
439 **/
igc_load_firmware(struct igc_hw * hw,u8 * buffer,u32 length)440 s32 igc_load_firmware(struct igc_hw *hw, u8 *buffer, u32 length)
441 {
442 u32 hicr, hibba, fwsm, icr, i;
443
444 DEBUGFUNC("igc_load_firmware");
445
446 if (hw->mac.type < igc_i210) {
447 DEBUGOUT("Hardware doesn't support loading FW by the driver\n");
448 return -IGC_ERR_CONFIG;
449 }
450
451 /* Check that the host interface is enabled. */
452 hicr = IGC_READ_REG(hw, IGC_HICR);
453 if (!(hicr & IGC_HICR_EN)) {
454 DEBUGOUT("IGC_HOST_EN bit disabled.\n");
455 return -IGC_ERR_CONFIG;
456 }
457 if (!(hicr & IGC_HICR_MEMORY_BASE_EN)) {
458 DEBUGOUT("IGC_HICR_MEMORY_BASE_EN bit disabled.\n");
459 return -IGC_ERR_CONFIG;
460 }
461
462 if (length == 0 || length & 0x3 || length > IGC_HI_FW_MAX_LENGTH) {
463 DEBUGOUT("Buffer length failure.\n");
464 return -IGC_ERR_INVALID_ARGUMENT;
465 }
466
467 /* Clear notification from ROM-FW by reading ICR register */
468 icr = IGC_READ_REG(hw, IGC_ICR_V2);
469
470 /* Reset ROM-FW */
471 hicr = IGC_READ_REG(hw, IGC_HICR);
472 hicr |= IGC_HICR_FW_RESET_ENABLE;
473 IGC_WRITE_REG(hw, IGC_HICR, hicr);
474 hicr |= IGC_HICR_FW_RESET;
475 IGC_WRITE_REG(hw, IGC_HICR, hicr);
476 IGC_WRITE_FLUSH(hw);
477
478 /* Wait till MAC notifies about its readiness after ROM-FW reset */
479 for (i = 0; i < (IGC_HI_COMMAND_TIMEOUT * 2); i++) {
480 icr = IGC_READ_REG(hw, IGC_ICR_V2);
481 if (icr & IGC_ICR_MNG)
482 break;
483 msec_delay(1);
484 }
485
486 /* Check for timeout */
487 if (i == IGC_HI_COMMAND_TIMEOUT) {
488 DEBUGOUT("FW reset failed.\n");
489 return -IGC_ERR_HOST_INTERFACE_COMMAND;
490 }
491
492 /* Wait till MAC is ready to accept new FW code */
493 for (i = 0; i < IGC_HI_COMMAND_TIMEOUT; i++) {
494 fwsm = IGC_READ_REG(hw, IGC_FWSM);
495 if ((fwsm & IGC_FWSM_FW_VALID) &&
496 ((fwsm & IGC_FWSM_MODE_MASK) >> IGC_FWSM_MODE_SHIFT ==
497 IGC_FWSM_HI_EN_ONLY_MODE))
498 break;
499 msec_delay(1);
500 }
501
502 /* Check for timeout */
503 if (i == IGC_HI_COMMAND_TIMEOUT) {
504 DEBUGOUT("FW reset failed.\n");
505 return -IGC_ERR_HOST_INTERFACE_COMMAND;
506 }
507
508 /* Calculate length in DWORDs */
509 length >>= 2;
510
511 /* The device driver writes the relevant FW code block
512 * into the ram area in DWORDs via 1kB ram addressing window.
513 */
514 for (i = 0; i < length; i++) {
515 if (!(i % IGC_HI_FW_BLOCK_DWORD_LENGTH)) {
516 /* Point to correct 1kB ram window */
517 hibba = IGC_HI_FW_BASE_ADDRESS +
518 ((IGC_HI_FW_BLOCK_DWORD_LENGTH << 2) *
519 (i / IGC_HI_FW_BLOCK_DWORD_LENGTH));
520
521 IGC_WRITE_REG(hw, IGC_HIBBA, hibba);
522 }
523
524 IGC_WRITE_REG_ARRAY_DWORD(hw, IGC_HOST_IF,
525 i % IGC_HI_FW_BLOCK_DWORD_LENGTH,
526 *((u32 *)buffer + i));
527 }
528
529 /* Setting this bit tells the ARC that a new FW is ready to execute. */
530 hicr = IGC_READ_REG(hw, IGC_HICR);
531 IGC_WRITE_REG(hw, IGC_HICR, hicr | IGC_HICR_C);
532
533 for (i = 0; i < IGC_HI_COMMAND_TIMEOUT; i++) {
534 hicr = IGC_READ_REG(hw, IGC_HICR);
535 if (!(hicr & IGC_HICR_C))
536 break;
537 msec_delay(1);
538 }
539
540 /* Check for successful FW start. */
541 if (i == IGC_HI_COMMAND_TIMEOUT) {
542 DEBUGOUT("New FW did not start within timeout period.\n");
543 return -IGC_ERR_HOST_INTERFACE_COMMAND;
544 }
545
546 return IGC_SUCCESS;
547 }
548