1 /** @file
2 * SMSC LAN91x series Network Controller Driver.
3 *
4 * Copyright (c) 2013 Linaro.org
5 *
6 * Derived from the LAN9118 driver. Original sources
7 * Copyright (c) 2012-2013, ARM Limited. All rights reserved.
8 *
9 * This program and the accompanying materials are licensed and
10 * made available under the terms and conditions of the BSD License
11 * which accompanies this distribution. The full text of the license
12 * may be found at: http://opensource.org/licenses/bsd-license.php
13 *
14 * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
16 *
17 **/
18
19 #include <Uefi.h>
20 #include <Uefi/UefiSpec.h>
21 #include <Base.h>
22
23 // Protocols used by this driver
24 #include <Protocol/SimpleNetwork.h>
25 #include <Protocol/ComponentName2.h>
26 #include <Protocol/PxeBaseCode.h>
27 #include <Protocol/DevicePath.h>
28
29 // Libraries used by this driver
30 #include <Library/UefiLib.h>
31 #include <Library/DebugLib.h>
32 #include <Library/UefiBootServicesTableLib.h>
33 #include <Library/MemoryAllocationLib.h>
34 #include <Library/IoLib.h>
35 #include <Library/PcdLib.h>
36 #include <Library/NetLib.h>
37 #include <Library/DevicePathLib.h>
38
39 // Hardware register definitions
40 #include "Lan91xDxeHw.h"
41
42 // Debugging output options
43 //#define LAN91X_PRINT_REGISTERS 1
44 //#define LAN91X_PRINT_PACKET_HEADERS 1
45 //#define LAN91X_PRINT_RECEIVE_FILTERS 1
46
47 // Chip power-down option -- UNTESTED
48 //#define LAN91X_POWER_DOWN 1
49
50 /*---------------------------------------------------------------------------------------------------------------------
51
52 LAN91x Information Structure
53
54 ---------------------------------------------------------------------------------------------------------------------*/
55 typedef struct _LAN91X_DRIVER {
56 // Driver signature
57 UINT32 Signature;
58 EFI_HANDLE ControllerHandle;
59
60 // EFI SNP protocol instances
61 EFI_SIMPLE_NETWORK_PROTOCOL Snp;
62 EFI_SIMPLE_NETWORK_MODE SnpMode;
63
64 // EFI Snp statistics instance
65 EFI_NETWORK_STATISTICS Stats;
66
67 // Transmit Buffer recycle queue
68
69 LIST_ENTRY TransmitQueueHead;
70
71 // Register access variables
72 UINTN IoBase; // I/O Base Address
73 UINT8 Revision; // Chip Revision Number
74 INT8 PhyAd; // Phy Address
75 UINT8 BankSel; // Currently selected register bank
76
77 } LAN91X_DRIVER;
78
79 #define LAN91X_NO_PHY (-1) // PhyAd value if PHY not detected
80
81 #define LAN91X_SIGNATURE SIGNATURE_32('S', 'M', '9', '1')
82 #define INSTANCE_FROM_SNP_THIS(a) CR(a, LAN91X_DRIVER, Snp, LAN91X_SIGNATURE)
83
84 #define LAN91X_STALL 2
85 #define LAN91X_MEMORY_ALLOC_POLLS 100 // Max times to poll for memory allocation
86 #define LAN91X_PKT_OVERHEAD 6 // Overhead bytes in packet buffer
87
88 // Synchronization TPLs
89 #define LAN91X_TPL TPL_CALLBACK
90
91 // Most common CRC32 Polynomial for little endian machines
92 #define CRC_POLYNOMIAL 0xEDB88320
93
94
95 typedef struct {
96 MAC_ADDR_DEVICE_PATH Lan91x;
97 EFI_DEVICE_PATH_PROTOCOL End;
98 } LAN91X_DEVICE_PATH;
99
100 LAN91X_DEVICE_PATH Lan91xPathTemplate = {
101 {
102 {
103 MESSAGING_DEVICE_PATH, MSG_MAC_ADDR_DP,
104 { (UINT8) (sizeof(MAC_ADDR_DEVICE_PATH)), (UINT8) ((sizeof(MAC_ADDR_DEVICE_PATH)) >> 8) }
105 },
106 { { 0 } },
107 0
108 },
109 {
110 END_DEVICE_PATH_TYPE,
111 END_ENTIRE_DEVICE_PATH_SUBTYPE,
112 { sizeof(EFI_DEVICE_PATH_PROTOCOL), 0 }
113 }
114 };
115
116 // Chip ID numbers and name strings
117 #define CHIP_9192 3
118 #define CHIP_9194 4
119 #define CHIP_9195 5
120 #define CHIP_9196 6
121 #define CHIP_91100 7
122 #define CHIP_91100FD 8
123 #define CHIP_91111FD 9
124
125 STATIC CHAR16 CONST * CONST ChipIds[ 16 ] = {
126 NULL, NULL, NULL,
127 /* 3 */ L"SMC91C90/91C92",
128 /* 4 */ L"SMC91C94",
129 /* 5 */ L"SMC91C95",
130 /* 6 */ L"SMC91C96",
131 /* 7 */ L"SMC91C100",
132 /* 8 */ L"SMC91C100FD",
133 /* 9 */ L"SMC91C11xFD",
134 NULL, NULL, NULL,
135 NULL, NULL, NULL
136 };
137
138 /* ------------------ TxBuffer Queue structures ------------------- */
139
140 typedef struct {
141 VOID *Buf;
142 UINTN Length;
143 } MSK_SYSTEM_BUF;
144
145 typedef struct {
146 UINTN Signature;
147 LIST_ENTRY Link;
148 MSK_SYSTEM_BUF SystemBuf;
149 } MSK_LINKED_SYSTEM_BUF;
150
151 #define TX_MBUF_SIGNATURE SIGNATURE_32 ('t','x','m','b')
152
153 /* ------------------ MAC Address Hash Calculations ------------------- */
154
155 /*
156 ** Generate a hash value from a multicast address
157 **
158 ** This uses the Ethernet standard CRC32 algorithm
159 **
160 ** INFO USED:
161 ** 1: http://en.wikipedia.org/wiki/Cyclic_redundancy_check
162 **
163 ** 2: http://www.erg.abdn.ac.uk/~gorry/eg3567/dl-pages/crc.html
164 **
165 ** 3: http://en.wikipedia.org/wiki/Computation_of_CRC
166 */
167 STATIC
168 UINT32
MulticastHash(IN EFI_MAC_ADDRESS * Mac,IN UINT32 AddrLen)169 MulticastHash (
170 IN EFI_MAC_ADDRESS *Mac,
171 IN UINT32 AddrLen
172 )
173 {
174 UINT32 Iter;
175 UINT32 Remainder;
176 UINT32 Crc32;
177 UINT8 *Addr;
178
179 // 0xFFFFFFFF is standard seed for Ethernet
180 Remainder = 0xFFFFFFFF;
181
182 // Generate the remainder byte-by-byte (LSB first)
183 Addr = &Mac->Addr[0];
184 while (AddrLen-- > 0) {
185 Remainder ^= *Addr++;
186 for (Iter = 0; Iter < 8; ++Iter) {
187 // Check if exponent is set
188 if ((Remainder & 1) != 0) {
189 Remainder = (Remainder >> 1) ^ CRC_POLYNOMIAL;
190 } else {
191 Remainder = (Remainder >> 1) ^ 0;
192 }
193 }
194 }
195
196 // Reverse the bits of the remainder
197 Crc32 = 0;
198 for (Iter = 0; Iter < 32; ++Iter) {
199 Crc32 <<= 1;
200 Crc32 |= Remainder & 1;
201 Remainder >>= 1;
202 }
203 return Crc32;
204 }
205
206
207 /* ---------------- Banked Register Operations ------------------ */
208
209 // Select the proper I/O bank
210 STATIC
211 VOID
SelectIoBank(LAN91X_DRIVER * LanDriver,UINTN Register)212 SelectIoBank (
213 LAN91X_DRIVER *LanDriver,
214 UINTN Register
215 )
216 {
217 UINT8 Bank;
218
219 Bank = RegisterToBank (Register);
220
221 // Select the proper I/O bank
222 if (LanDriver->BankSel != Bank) {
223 MmioWrite16 (LanDriver->IoBase + LAN91X_BANK_OFFSET, Bank);
224 LanDriver->BankSel = Bank;
225 }
226 }
227
228 // Read a 16-bit I/O-space register
229 STATIC
230 UINT16
ReadIoReg16(LAN91X_DRIVER * LanDriver,UINTN Register)231 ReadIoReg16 (
232 LAN91X_DRIVER *LanDriver,
233 UINTN Register
234 )
235 {
236 UINT8 Offset;
237
238 // Select the proper I/O bank
239 SelectIoBank (LanDriver, Register);
240
241 // Read the requested register
242 Offset = RegisterToOffset (Register);
243 return MmioRead16 (LanDriver->IoBase + Offset);
244 }
245
246 // Write a 16-bit I/O-space register
247 STATIC
248 UINT16
WriteIoReg16(LAN91X_DRIVER * LanDriver,UINTN Register,UINT16 Value)249 WriteIoReg16 (
250 LAN91X_DRIVER *LanDriver,
251 UINTN Register,
252 UINT16 Value
253 )
254 {
255 UINT8 Offset;
256
257 // Select the proper I/O bank
258 SelectIoBank (LanDriver, Register);
259
260 // Write the requested register
261 Offset = RegisterToOffset (Register);
262 return MmioWrite16 (LanDriver->IoBase + Offset, Value);
263 }
264
265 // Read an 8-bit I/O-space register
266 STATIC
267 UINT8
ReadIoReg8(LAN91X_DRIVER * LanDriver,UINTN Register)268 ReadIoReg8 (
269 LAN91X_DRIVER *LanDriver,
270 UINTN Register
271 )
272 {
273 UINT8 Offset;
274
275 // Select the proper I/O bank
276 SelectIoBank (LanDriver, Register);
277
278 // Read the requested register
279 Offset = RegisterToOffset (Register);
280 return MmioRead8 (LanDriver->IoBase + Offset);
281 }
282
283 // Write an 8-bit I/O-space register
284 STATIC
285 UINT8
WriteIoReg8(LAN91X_DRIVER * LanDriver,UINTN Register,UINT8 Value)286 WriteIoReg8 (
287 LAN91X_DRIVER *LanDriver,
288 UINTN Register,
289 UINT8 Value
290 )
291 {
292 UINT8 Offset;
293
294 // Select the proper I/O bank
295 SelectIoBank (LanDriver, Register);
296
297 // Write the requested register
298 Offset = RegisterToOffset (Register);
299 return MmioWrite8 (LanDriver->IoBase + Offset, Value);
300 }
301
302
303 /* ---------------- MII/PHY Access Operations ------------------ */
304
305 #define LAN91X_MDIO_STALL 1
306
307 STATIC
308 VOID
MdioOutput(LAN91X_DRIVER * LanDriver,UINTN Bits,UINT32 Value)309 MdioOutput (
310 LAN91X_DRIVER *LanDriver,
311 UINTN Bits,
312 UINT32 Value
313 )
314 {
315 UINT16 MgmtReg;
316 UINT32 Mask;
317
318 MgmtReg = ReadIoReg16 (LanDriver, LAN91X_MGMT);
319 MgmtReg &= ~MGMT_MCLK;
320 MgmtReg |= MGMT_MDOE;
321
322 for (Mask = (1 << (Bits - 1)); Mask != 0; Mask >>= 1) {
323 if ((Value & Mask) != 0) {
324 MgmtReg |= MGMT_MDO;
325 } else {
326 MgmtReg &= ~MGMT_MDO;
327 }
328
329 WriteIoReg16 (LanDriver, LAN91X_MGMT, MgmtReg);
330 gBS->Stall (LAN91X_MDIO_STALL);
331 WriteIoReg16 (LanDriver, LAN91X_MGMT, MgmtReg | MGMT_MCLK);
332 gBS->Stall (LAN91X_MDIO_STALL);
333 }
334 }
335 #define PHY_OUTPUT_TIME (2 * LAN91X_MDIO_STALL)
336
337 STATIC
338 UINT32
MdioInput(LAN91X_DRIVER * LanDriver,UINTN Bits)339 MdioInput (
340 LAN91X_DRIVER *LanDriver,
341 UINTN Bits
342 )
343 {
344 UINT16 MgmtReg;
345 UINT32 Mask;
346 UINT32 Value;
347
348 MgmtReg = ReadIoReg16 (LanDriver, LAN91X_MGMT);
349 MgmtReg &= ~(MGMT_MDOE | MGMT_MCLK | MGMT_MDO);
350 WriteIoReg16 (LanDriver, LAN91X_MGMT, MgmtReg);
351
352 Value = 0;
353 for (Mask = (1 << (Bits - 1)); Mask != 0; Mask >>= 1) {
354 if ((ReadIoReg16 (LanDriver, LAN91X_MGMT) & MGMT_MDI) != 0) {
355 Value |= Mask;
356 }
357
358 WriteIoReg16 (LanDriver, LAN91X_MGMT, MgmtReg);
359 gBS->Stall (LAN91X_MDIO_STALL);
360 WriteIoReg16 (LanDriver, LAN91X_MGMT, MgmtReg | MGMT_MCLK);
361 gBS->Stall (LAN91X_MDIO_STALL);
362 }
363
364 return Value;
365 }
366 #define PHY_INPUT_TIME (2 * LAN91X_MDIO_STALL)
367
368 STATIC
369 VOID
MdioIdle(LAN91X_DRIVER * LanDriver)370 MdioIdle (
371 LAN91X_DRIVER *LanDriver
372 )
373 {
374 UINT16 MgmtReg;
375
376 MgmtReg = ReadIoReg16 (LanDriver, LAN91X_MGMT);
377 MgmtReg &= ~(MGMT_MDOE | MGMT_MCLK | MGMT_MDO);
378 WriteIoReg16 (LanDriver, LAN91X_MGMT, MgmtReg);
379 }
380
381 // Write to a PHY register
382 STATIC
383 VOID
WritePhyReg16(LAN91X_DRIVER * LanDriver,UINTN RegAd,UINT16 Value)384 WritePhyReg16 (
385 LAN91X_DRIVER *LanDriver,
386 UINTN RegAd,
387 UINT16 Value
388 )
389 {
390 // Bit-bang the MII Serial Frame write operation
391 MdioOutput (LanDriver, 32, 0xffffffff); // Send 32 Ones as a preamble
392 MdioOutput (LanDriver, 2, 0x01); // Send Start (01)
393 MdioOutput (LanDriver, 2, 0x01); // Send Write (01)
394 MdioOutput (LanDriver, 5, LanDriver->PhyAd); // Send PHYAD[4:0]
395 MdioOutput (LanDriver, 5, RegAd); // Send REGAD[4:0]
396 MdioOutput (LanDriver, 2, 0x02); // Send TurnAround (10)
397 MdioOutput (LanDriver, 16, Value); // Write 16 data bits
398
399 // Idle the MDIO bus
400 MdioIdle (LanDriver);
401 }
402 // Calculate approximate time to write a PHY register in microseconds
403 #define PHY_WRITE_TIME ((32 + 2 + 2 + 5 + 5 + 2 + 16) * PHY_OUTPUT_TIME)
404
405 // Read from a PHY register
406 STATIC
407 UINT16
ReadPhyReg16(LAN91X_DRIVER * LanDriver,UINTN RegAd)408 ReadPhyReg16 (
409 LAN91X_DRIVER *LanDriver,
410 UINTN RegAd
411 )
412 {
413 UINT32 Value;
414
415 // Bit-bang the MII Serial Frame read operation
416 MdioOutput (LanDriver, 32, 0xffffffff); // Send 32 Ones as a preamble
417 MdioOutput (LanDriver, 2, 0x01); // Send Start (01)
418 MdioOutput (LanDriver, 2, 0x02); // Send Read (10)
419 MdioOutput (LanDriver, 5, LanDriver->PhyAd); // Send PHYAD[4:0]
420 MdioOutput (LanDriver, 5, RegAd); // Send REGAD[4:0]
421
422 (VOID) MdioInput (LanDriver, 2); // Discard TurnAround bits
423 Value = MdioInput (LanDriver, 16); // Read 16 data bits
424
425 // Idle the MDIO bus
426 MdioIdle (LanDriver);
427
428 return (Value & 0xffff);
429 }
430 // Calculate approximate time to read a PHY register in microseconds
431 #define PHY_READ_TIME (((32 + 2 + 2 + 5 + 5) * PHY_OUTPUT_TIME) + \
432 ((2 + 16) * PHY_INPUT_TIME))
433
434
435 /* ---------------- Debug Functions ------------------ */
436
437 #ifdef LAN91X_PRINT_REGISTERS
438 STATIC
439 VOID
PrintIoRegisters(IN LAN91X_DRIVER * LanDriver)440 PrintIoRegisters (
441 IN LAN91X_DRIVER *LanDriver
442 )
443 {
444 UINTN Bank;
445 UINTN Offset;
446 UINT16 Value;
447
448 DEBUG((EFI_D_ERROR, "\nLAN91x I/O Register Dump:\n"));
449
450 // Print currrent bank select register
451 Value = MmioRead16 (LanDriver->IoBase + LAN91X_BANK_OFFSET);
452 DEBUG((EFI_D_ERROR, " BankSel: %d Bank Register %04x (%d)\n",
453 LanDriver->BankSel, Value, Value & 0x0007));
454
455 // Print all I/O registers
456 for (Offset = 0; Offset < 0x0e; Offset += 2) {
457 DEBUG((EFI_D_ERROR, " %02x:", Offset));
458 for (Bank = 0; Bank <= 3; ++Bank) {
459 DEBUG((EFI_D_ERROR, " %04x", ReadIoReg16 (LanDriver, MakeRegister (Bank, Offset))));
460 }
461 DEBUG((EFI_D_ERROR, "\n"));
462 }
463 }
464
465 STATIC
466 VOID
PrintPhyRegisters(IN LAN91X_DRIVER * LanDriver)467 PrintPhyRegisters (
468 IN LAN91X_DRIVER *LanDriver
469 )
470 {
471 UINTN RegNum;
472
473 DEBUG((EFI_D_ERROR, "\nLAN91x Phy %d Register Dump:\n", LanDriver->PhyAd));
474
475 // Print all Phy registers
476 for (RegNum = 0; RegNum <= 5; ++RegNum) {
477 DEBUG((EFI_D_ERROR, " %2d: %04x\n",
478 RegNum,
479 ReadPhyReg16 (LanDriver, RegNum)
480 ));
481 }
482 for (RegNum = 16; RegNum <= 20; ++RegNum) {
483 DEBUG((EFI_D_ERROR, " %2d: %04x\n",
484 RegNum,
485 ReadPhyReg16 (LanDriver, RegNum)
486 ));
487 }
488 }
489 #endif
490
491 #if LAN91X_PRINT_PACKET_HEADERS
492 STATIC
493 VOID
PrintIpDgram(IN CONST VOID * DstMac,IN CONST VOID * SrcMac,IN CONST VOID * Proto,IN CONST VOID * IpDgram)494 PrintIpDgram (
495 IN CONST VOID *DstMac,
496 IN CONST VOID *SrcMac,
497 IN CONST VOID *Proto,
498 IN CONST VOID *IpDgram
499 )
500 {
501 CONST UINT8 *Ptr;
502 UINT16 SrcPort;
503 UINT16 DstPort;
504
505 Ptr = DstMac;
506 DEBUG((EFI_D_ERROR, " Dst: %02x-%02x-%02x",
507 Ptr[0], Ptr[1], Ptr[2]));
508 DEBUG((EFI_D_ERROR, "-%02x-%02x-%02x",
509 Ptr[3], Ptr[4], Ptr[5]));
510
511 Ptr = SrcMac;
512 DEBUG((EFI_D_ERROR, " Src: %02x-%02x-%02x",
513 Ptr[0], Ptr[1], Ptr[2]));
514 DEBUG((EFI_D_ERROR, "-%02x-%02x-%02x",
515 Ptr[3], Ptr[4], Ptr[5]));
516
517 Ptr = Proto;
518 DEBUG((EFI_D_ERROR, " Proto: %02x%02x\n",
519 Ptr[0], Ptr[1]));
520
521 Ptr = IpDgram;
522 switch (Ptr[9]) {
523 case EFI_IP_PROTO_ICMP:
524 DEBUG((EFI_D_ERROR, " ICMP"));
525 break;
526 case EFI_IP_PROTO_TCP:
527 DEBUG((EFI_D_ERROR, " TCP"));
528 break;
529 case EFI_IP_PROTO_UDP:
530 DEBUG((EFI_D_ERROR, " UDP"));
531 break;
532 default:
533 DEBUG((EFI_D_ERROR, " IpProto %d\n", Ptr[9]));
534 return;
535 }
536
537 DEBUG((EFI_D_ERROR, " SrcIp: %d.%d.%d.%d",
538 Ptr[12], Ptr[13], Ptr[14], Ptr[15]));
539 DEBUG((EFI_D_ERROR, " DstIp: %d.%d.%d.%d",
540 Ptr[16], Ptr[17], Ptr[18], Ptr[19]));
541
542 SrcPort = (Ptr[20] << 8) | Ptr[21];
543 DstPort = (Ptr[22] << 8) | Ptr[23];
544 DEBUG((EFI_D_ERROR, " SrcPort: %d DstPort: %d\n", SrcPort, DstPort));
545 }
546 #endif
547
548
549 /* ---------------- PHY Management Operations ----------------- */
550
551 STATIC
552 EFI_STATUS
PhyDetect(IN LAN91X_DRIVER * LanDriver)553 PhyDetect (
554 IN LAN91X_DRIVER *LanDriver
555 )
556 {
557 UINT16 PhyId1;
558 UINT16 PhyId2;
559
560 for (LanDriver->PhyAd = 0x1f; LanDriver->PhyAd >= 0 ; --LanDriver->PhyAd) {
561 PhyId1 = ReadPhyReg16 (LanDriver, PHY_INDEX_ID1);
562 PhyId2 = ReadPhyReg16 (LanDriver, PHY_INDEX_ID2);
563
564 if ((PhyId1 != 0x0000) && (PhyId1 != 0xffff) &&
565 (PhyId2 != 0x0000) && (PhyId2 != 0xffff)) {
566 if ((PhyId1 == 0x0016) && ((PhyId2 & 0xfff0) == 0xf840)) {
567 DEBUG((EFI_D_ERROR, "LAN91x: PHY type LAN83C183 (LAN91C111 Internal)\n"));
568 } else if ((PhyId1 == 0x0282) && ((PhyId2 & 0xfff0) == 0x1c50)) {
569 DEBUG((EFI_D_ERROR, "LAN91x: PHY type LAN83C180\n"));
570 } else {
571 DEBUG((EFI_D_ERROR, "LAN91x: PHY id %04x:%04x\n", PhyId1, PhyId2));
572 }
573 return EFI_SUCCESS;
574 }
575 }
576
577 DEBUG((EFI_D_ERROR, "LAN91x: PHY detection failed\n"));
578 return EFI_NO_MEDIA;
579 }
580
581
582 // Check the Link Status and take appropriate action
583 STATIC
584 BOOLEAN
CheckLinkStatus(IN LAN91X_DRIVER * LanDriver)585 CheckLinkStatus (
586 IN LAN91X_DRIVER *LanDriver
587 )
588 {
589 UINT16 PhyStatus;
590
591 // Get the PHY Status
592 PhyStatus = ReadPhyReg16 (LanDriver, PHY_INDEX_BASIC_STATUS);
593
594 return (PhyStatus & PHYSTS_LINK_STS) != 0;
595 }
596
597
598 // Do auto-negotiation
599 STATIC
600 EFI_STATUS
PhyAutoNegotiate(IN LAN91X_DRIVER * LanDriver)601 PhyAutoNegotiate (
602 IN LAN91X_DRIVER *LanDriver
603 )
604 {
605 UINTN Retries;
606 UINT16 PhyControl;
607 UINT16 PhyStatus;
608 UINT16 PhyAdvert;
609
610 // If there isn't a PHY, don't try to reset it
611 if (LanDriver->PhyAd == LAN91X_NO_PHY) {
612 return EFI_SUCCESS;
613 }
614
615 // Next check that auto-negotiation is supported
616 PhyStatus = ReadPhyReg16 (LanDriver, PHY_INDEX_BASIC_STATUS);
617 if ((PhyStatus & PHYSTS_AUTO_CAP) == 0) {
618 return EFI_SUCCESS;
619 }
620
621 // Translate capabilities to advertise
622 PhyAdvert = PHYANA_CSMA;
623
624 if ((PhyStatus & PHYSTS_10BASET_HDPLX) != 0) {
625 PhyAdvert |= PHYANA_10BASET;
626 }
627 if ((PhyStatus & PHYSTS_10BASET_FDPLX) != 0) {
628 PhyAdvert |= PHYANA_10BASETFD;
629 }
630 if ((PhyStatus & PHYSTS_100BASETX_HDPLX) != 0) {
631 PhyAdvert |= PHYANA_100BASETX;
632 }
633 if ((PhyStatus & PHYSTS_100BASETX_FDPLX) != 0) {
634 PhyAdvert |= PHYANA_100BASETXFD;
635 }
636 if ((PhyStatus & PHYSTS_100BASE_T4) != 0) {
637 PhyAdvert |= PHYANA_100BASET4;
638 }
639
640 // Set the capabilities to advertise
641 WritePhyReg16 (LanDriver, PHY_INDEX_AUTO_NEG_ADVERT, PhyAdvert);
642 (VOID) ReadPhyReg16 (LanDriver, PHY_INDEX_AUTO_NEG_ADVERT);
643
644 // Restart Auto-Negotiation
645 PhyControl = ReadPhyReg16 (LanDriver, PHY_INDEX_BASIC_CTRL);
646 PhyControl &= ~(PHYCR_SPEED_SEL | PHYCR_DUPLEX_MODE);
647 PhyControl |= PHYCR_AUTO_EN | PHYCR_RST_AUTO;
648 WritePhyReg16 (LanDriver, PHY_INDEX_BASIC_CTRL, PhyControl);
649
650 // Wait up to 2 seconds for the process to complete
651 Retries = 2000000 / (PHY_READ_TIME + 100);
652 while ((ReadPhyReg16 (LanDriver, PHY_INDEX_BASIC_STATUS) & PHYSTS_AUTO_COMP) == 0) {
653 if (--Retries == 0) {
654 DEBUG((EFI_D_ERROR, "LAN91x: PHY auto-negotiation timed-out\n"));
655 return EFI_TIMEOUT;
656 }
657 gBS->Stall (100);
658 }
659
660 return EFI_SUCCESS;
661 }
662
663
664 // Perform PHY software reset
665 STATIC
666 EFI_STATUS
PhySoftReset(IN LAN91X_DRIVER * LanDriver)667 PhySoftReset (
668 IN LAN91X_DRIVER *LanDriver
669 )
670 {
671 UINTN Retries;
672
673 // If there isn't a PHY, don't try to reset it
674 if (LanDriver->PhyAd == LAN91X_NO_PHY) {
675 return EFI_SUCCESS;
676 }
677
678 // Request a PHY reset
679 WritePhyReg16 (LanDriver, PHY_INDEX_BASIC_CTRL, PHYCR_RESET);
680
681 // The internal PHY will reset within 50ms. Allow 100ms.
682 Retries = 100000 / (PHY_READ_TIME + 100);
683 while (ReadPhyReg16 (LanDriver, PHY_INDEX_BASIC_CTRL) & PHYCR_RESET) {
684 if (--Retries == 0) {
685 DEBUG((EFI_D_ERROR, "LAN91x: PHY reset timed-out\n"));
686 return EFI_TIMEOUT;
687 }
688 gBS->Stall (100);
689 }
690
691 return EFI_SUCCESS;
692 }
693
694
695 /* ---------------- General Operations ----------------- */
696
697 STATIC
698 EFI_MAC_ADDRESS
GetCurrentMacAddress(IN LAN91X_DRIVER * LanDriver)699 GetCurrentMacAddress (
700 IN LAN91X_DRIVER *LanDriver
701 )
702 {
703 UINTN RegNum;
704 UINT8 *Addr;
705 EFI_MAC_ADDRESS MacAddress;
706
707 SetMem (&MacAddress, sizeof(MacAddress), 0);
708
709 Addr = &MacAddress.Addr[0];
710 for (RegNum = LAN91X_IAR0; RegNum <= LAN91X_IAR5; ++RegNum) {
711 *Addr = ReadIoReg8 (LanDriver, RegNum);
712 ++Addr;
713 }
714
715 return MacAddress;
716 }
717
718 STATIC
719 EFI_STATUS
SetCurrentMacAddress(IN LAN91X_DRIVER * LanDriver,IN EFI_MAC_ADDRESS * MacAddress)720 SetCurrentMacAddress (
721 IN LAN91X_DRIVER *LanDriver,
722 IN EFI_MAC_ADDRESS *MacAddress
723 )
724 {
725 UINTN RegNum;
726 UINT8 *Addr;
727
728 Addr = &MacAddress->Addr[0];
729 for (RegNum = LAN91X_IAR0; RegNum <= LAN91X_IAR5; ++RegNum) {
730 WriteIoReg8 (LanDriver, RegNum, *Addr);
731 ++Addr;
732 }
733
734 return EFI_SUCCESS;
735 }
736
737 STATIC
738 EFI_STATUS
MmuOperation(IN LAN91X_DRIVER * LanDriver,IN UINTN MmuOp)739 MmuOperation (
740 IN LAN91X_DRIVER *LanDriver,
741 IN UINTN MmuOp
742 )
743 {
744 UINTN Polls;
745
746 WriteIoReg16 (LanDriver, LAN91X_MMUCR, MmuOp);
747 Polls = 100;
748 while ((ReadIoReg16 (LanDriver, LAN91X_MMUCR) & MMUCR_BUSY) != 0) {
749 if (--Polls == 0) {
750 DEBUG((EFI_D_ERROR, "LAN91x: MMU operation %04x timed-out\n", MmuOp));
751 return EFI_TIMEOUT;
752 }
753 gBS->Stall (LAN91X_STALL);
754 }
755
756 return EFI_SUCCESS;
757 }
758
759 // Read bytes from the DATA register
760 STATIC
761 EFI_STATUS
ReadIoData(IN LAN91X_DRIVER * LanDriver,IN VOID * Buffer,IN UINTN BufLen)762 ReadIoData (
763 IN LAN91X_DRIVER *LanDriver,
764 IN VOID *Buffer,
765 IN UINTN BufLen
766 )
767 {
768 UINT8 *Ptr;
769
770 Ptr = Buffer;
771 for (; BufLen > 0; --BufLen) {
772 *Ptr = ReadIoReg8 (LanDriver, LAN91X_DATA0);
773 ++Ptr;
774 }
775
776 return EFI_SUCCESS;
777 }
778
779 // Write bytes to the DATA register
780 STATIC
781 EFI_STATUS
WriteIoData(IN LAN91X_DRIVER * LanDriver,IN VOID * Buffer,IN UINTN BufLen)782 WriteIoData (
783 IN LAN91X_DRIVER *LanDriver,
784 IN VOID *Buffer,
785 IN UINTN BufLen
786 )
787 {
788 UINT8 *Ptr;
789
790 Ptr = Buffer;
791 for (; BufLen > 0; --BufLen) {
792 WriteIoReg8 (LanDriver, LAN91X_DATA0, *Ptr);
793 ++Ptr;
794 }
795
796 return EFI_SUCCESS;
797 }
798
799 // Disable the interface
800 STATIC
801 EFI_STATUS
ChipDisable(IN LAN91X_DRIVER * LanDriver)802 ChipDisable (
803 IN LAN91X_DRIVER *LanDriver
804 )
805 {
806 #ifdef LAN91X_POWER_DOWN
807 UINT16 Val16;
808 #endif
809
810 // Stop Rx and Tx operations
811 WriteIoReg16 (LanDriver, LAN91X_RCR, RCR_CLEAR);
812 WriteIoReg16 (LanDriver, LAN91X_TCR, TCR_CLEAR);
813
814 #ifdef LAN91X_POWER_DOWN
815 // Power-down the chip
816 Val16 = ReadIoReg16 (LanDriver, LAN91X_CR);
817 Val16 &= ~CR_EPH_POWER_EN;
818 WriteIoReg16 (LanDriver, LAN91X_CR, Val16);
819 #endif
820
821 return EFI_SUCCESS;
822 }
823
824 // Enable the interface
825 STATIC
826 EFI_STATUS
ChipEnable(IN LAN91X_DRIVER * LanDriver)827 ChipEnable (
828 IN LAN91X_DRIVER *LanDriver
829 )
830 {
831 #ifdef LAN91X_POWER_DOWN
832 UINT16 Val16;
833
834 // Power-up the chip
835 Val16 = ReadIoReg16 (LanDriver, LAN91X_CR);
836 Val16 |= CR_EPH_POWER_EN;
837 WriteIoReg16 (LanDriver, LAN91X_CR, Val16);
838 gBS->Stall (LAN91X_STALL);
839 #endif
840
841 // Start Rx and Tx operations
842 WriteIoReg16 (LanDriver, LAN91X_TCR, TCR_DEFAULT);
843 WriteIoReg16 (LanDriver, LAN91X_RCR, RCR_DEFAULT);
844
845 return EFI_SUCCESS;
846 }
847
848
849 // Perform software reset on the LAN91x
850 STATIC
851 EFI_STATUS
SoftReset(IN LAN91X_DRIVER * LanDriver)852 SoftReset (
853 IN LAN91X_DRIVER *LanDriver
854 )
855 {
856 UINT16 Val16;
857
858 // Issue the reset
859 WriteIoReg16 (LanDriver, LAN91X_RCR, RCR_SOFT_RST);
860 gBS->Stall (LAN91X_STALL);
861 WriteIoReg16 (LanDriver, LAN91X_RCR, RCR_CLEAR);
862
863 // Set the configuration register
864 WriteIoReg16 (LanDriver, LAN91X_CR, CR_DEFAULT);
865 gBS->Stall (LAN91X_STALL);
866
867 // Stop Rx and Tx
868 WriteIoReg16 (LanDriver, LAN91X_RCR, RCR_CLEAR);
869 WriteIoReg16 (LanDriver, LAN91X_TCR, TCR_CLEAR);
870
871 // Initialize the Control Register
872 Val16 = ReadIoReg16 (LanDriver, LAN91X_CTR);
873 Val16 |= CTR_AUTO_REL;
874 WriteIoReg16 (LanDriver, LAN91X_CTR, Val16);
875
876 // Reset the MMU
877 MmuOperation (LanDriver, MMUCR_OP_RESET_MMU);
878
879 return EFI_SUCCESS;
880 }
881
882 /*
883 ** Probe()
884 **
885 ** Validate that there is a LAN91x device.
886 **
887 */
888 STATIC
889 EFI_STATUS
Probe(IN LAN91X_DRIVER * LanDriver)890 Probe (
891 IN LAN91X_DRIVER *LanDriver
892 )
893 {
894 UINT16 Bank;
895 UINT16 Val16;
896 CHAR16 CONST *ChipId;
897 UINTN ResetTime;
898
899 // First check that the Bank Select register is valid
900 Bank = MmioRead16 (LanDriver->IoBase + LAN91X_BANK_OFFSET);
901 if ((Bank & 0xff00) != 0x3300) {
902 DEBUG((EFI_D_ERROR, "LAN91x: signature error: expecting 33xx, read %04x\n", Bank));
903 return EFI_DEVICE_ERROR;
904 }
905
906 // Try reading the revision register next
907 LanDriver->BankSel = 0xff;
908 Val16 = ReadIoReg16 (LanDriver, LAN91X_REV);
909
910 Bank = MmioRead16 (LanDriver->IoBase + LAN91X_BANK_OFFSET);
911 if ((Bank & 0xff03) != 0x3303) {
912 DEBUG((EFI_D_ERROR, "LAN91x: signature error: expecting 33x3, read %04x\n", Bank));
913 return EFI_DEVICE_ERROR;
914 }
915
916 // Validate the revision register
917 if ((Val16 & 0xff00) != 0x3300) {
918 DEBUG((EFI_D_ERROR, "LAN91x: revision error: expecting 33xx, read %04x\n", Val16));
919 return EFI_DEVICE_ERROR;
920 }
921
922 ChipId = ChipIds[(Val16 >> 4) & 0x0f];
923 if (ChipId == NULL) {
924 DEBUG((EFI_D_ERROR, "LAN91x: unrecognized revision: %04x\n", Val16));
925 return EFI_DEVICE_ERROR;
926 }
927 DEBUG((EFI_D_ERROR, "LAN91x: detected chip %s rev %d\n", ChipId, Val16 & 0xf));
928 LanDriver->Revision = Val16 & 0xff;
929
930 // Reload from EEPROM to get the hardware MAC address
931 WriteIoReg16 (LanDriver, LAN91X_CTR, CTR_RESERVED | CTR_RELOAD);
932 ResetTime = 1000;
933 while ((ReadIoReg16 (LanDriver, LAN91X_CTR) & CTR_RELOAD) != 0) {
934 if (--ResetTime == 0) {
935 DEBUG((EFI_D_ERROR, "LAN91x: reload from EEPROM timed-out\n"));
936 WriteIoReg16 (LanDriver, LAN91X_CTR, CTR_RESERVED);
937 return EFI_DEVICE_ERROR;
938 }
939 gBS->Stall (LAN91X_STALL);
940 }
941
942 // Read and save the Permanent MAC Address
943 LanDriver->SnpMode.PermanentAddress = GetCurrentMacAddress (LanDriver);
944 LanDriver->SnpMode.CurrentAddress = LanDriver->SnpMode.PermanentAddress;
945 DEBUG((EFI_D_ERROR, //EFI_D_NET | EFI_D_INFO,
946 "LAN91x: HW MAC Address: %02x-%02x-%02x-%02x-%02x-%02x\n",
947 LanDriver->SnpMode.PermanentAddress.Addr[0],
948 LanDriver->SnpMode.PermanentAddress.Addr[1],
949 LanDriver->SnpMode.PermanentAddress.Addr[2],
950 LanDriver->SnpMode.PermanentAddress.Addr[3],
951 LanDriver->SnpMode.PermanentAddress.Addr[4],
952 LanDriver->SnpMode.PermanentAddress.Addr[5]
953 ));
954
955 // Reset the device
956 SoftReset (LanDriver);
957
958 // Try to detect a PHY
959 if (LanDriver->Revision > (CHIP_91100 << 4)) {
960 PhyDetect (LanDriver);
961 } else {
962 LanDriver->PhyAd = LAN91X_NO_PHY;
963 }
964
965 return EFI_SUCCESS;
966 }
967
968
969
970
971 /*------------------ Simple Network Driver entry point functions ------------------*/
972
973 // Refer to the Simple Network Protocol section (21.1)
974 // in the UEFI 2.3.1 Specification for documentation.
975
976 #define ReturnUnlock(s) do { Status = (s); goto exit_unlock; } while(0)
977
978
979 /*
980 ** UEFI Start() function
981 **
982 */
983 EFI_STATUS
984 EFIAPI
SnpStart(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp)985 SnpStart (
986 IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp
987 )
988 {
989 EFI_SIMPLE_NETWORK_MODE *Mode;
990 EFI_TPL SavedTpl;
991 EFI_STATUS Status;
992
993 // Check Snp instance
994 if (Snp == NULL) {
995 return EFI_INVALID_PARAMETER;
996 }
997
998 // Serialize access to data and registers
999 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1000 Mode = Snp->Mode;
1001
1002 // Check state of the driver
1003 switch (Mode->State) {
1004 case EfiSimpleNetworkStopped:
1005 break;
1006 case EfiSimpleNetworkStarted:
1007 case EfiSimpleNetworkInitialized:
1008 DEBUG((EFI_D_WARN, "LAN91x: Driver already started\n"));
1009 ReturnUnlock (EFI_ALREADY_STARTED);
1010 default:
1011 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1012 (UINTN)Snp->Mode->State));
1013 ReturnUnlock (EFI_DEVICE_ERROR);
1014 }
1015
1016
1017 // Change state
1018 Mode->State = EfiSimpleNetworkStarted;
1019 Status = EFI_SUCCESS;
1020
1021 // Restore TPL and return
1022 exit_unlock:
1023 gBS->RestoreTPL (SavedTpl);
1024 return Status;
1025 }
1026
1027 /*
1028 ** UEFI Stop() function
1029 **
1030 */
1031 EFI_STATUS
1032 EFIAPI
SnpStop(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp)1033 SnpStop (
1034 IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp
1035 )
1036 {
1037 LAN91X_DRIVER *LanDriver;
1038 EFI_TPL SavedTpl;
1039 EFI_STATUS Status;
1040
1041 // Check Snp Instance
1042 if (Snp == NULL) {
1043 return EFI_INVALID_PARAMETER;
1044 }
1045
1046 // Serialize access to data and registers
1047 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1048
1049 // Check state of the driver
1050 switch (Snp->Mode->State) {
1051 case EfiSimpleNetworkStarted:
1052 case EfiSimpleNetworkInitialized:
1053 break;
1054 case EfiSimpleNetworkStopped:
1055 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1056 ReturnUnlock (EFI_NOT_STARTED);
1057 default:
1058 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1059 (UINTN)Snp->Mode->State));
1060 ReturnUnlock (EFI_DEVICE_ERROR);
1061 }
1062
1063 // Find the LanDriver structure
1064 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1065
1066 // Stop the Tx and Rx
1067 ChipDisable (LanDriver);
1068
1069 // Change the state
1070 Snp->Mode->State = EfiSimpleNetworkStopped;
1071 Status = EFI_SUCCESS;
1072
1073 // Restore TPL and return
1074 exit_unlock:
1075 gBS->RestoreTPL (SavedTpl);
1076 return Status;
1077 }
1078
1079 /*
1080 ** UEFI Initialize() function
1081 **
1082 */
1083 EFI_STATUS
1084 EFIAPI
SnpInitialize(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,IN UINTN RxBufferSize OPTIONAL,IN UINTN TxBufferSize OPTIONAL)1085 SnpInitialize (
1086 IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
1087 IN UINTN RxBufferSize OPTIONAL,
1088 IN UINTN TxBufferSize OPTIONAL
1089 )
1090 {
1091 LAN91X_DRIVER *LanDriver;
1092 EFI_TPL SavedTpl;
1093 EFI_STATUS Status;
1094
1095 // Check Snp Instance
1096 if (Snp == NULL) {
1097 return EFI_INVALID_PARAMETER;
1098 }
1099
1100 // Serialize access to data and registers
1101 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1102
1103 // Check that driver was started but not initialised
1104 switch (Snp->Mode->State) {
1105 case EfiSimpleNetworkStarted:
1106 break;
1107 case EfiSimpleNetworkInitialized:
1108 DEBUG((EFI_D_WARN, "LAN91x: Driver already initialized\n"));
1109 ReturnUnlock (EFI_SUCCESS);
1110 case EfiSimpleNetworkStopped:
1111 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1112 ReturnUnlock (EFI_NOT_STARTED);
1113 default:
1114 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1115 (UINTN)Snp->Mode->State));
1116 ReturnUnlock (EFI_DEVICE_ERROR);
1117 }
1118
1119 // Find the LanDriver structure
1120 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1121
1122 // Initiate a software reset
1123 Status = SoftReset (LanDriver);
1124 if (EFI_ERROR(Status)) {
1125 DEBUG((EFI_D_WARN, "LAN91x: Soft reset failed\n"));
1126 ReturnUnlock (EFI_DEVICE_ERROR);
1127 }
1128
1129 // Initiate a PHY reset
1130 if (PhySoftReset (LanDriver) < 0) {
1131 Snp->Mode->State = EfiSimpleNetworkStopped;
1132 DEBUG((EFI_D_WARN, "LAN91x: PHY soft reset timeout\n"));
1133 ReturnUnlock (EFI_NOT_STARTED);
1134 }
1135
1136 // Do auto-negotiation
1137 Status = PhyAutoNegotiate (LanDriver);
1138 if (EFI_ERROR(Status)) {
1139 DEBUG((EFI_D_WARN, "LAN91x: PHY auto-negotiation failed\n"));
1140 }
1141
1142 // Enable the receiver and transmitter
1143 ChipEnable (LanDriver);
1144
1145 // Now acknowledge all interrupts
1146 WriteIoReg8 (LanDriver, LAN91X_IST, 0xFF);
1147
1148 // Declare the driver as initialized
1149 Snp->Mode->State = EfiSimpleNetworkInitialized;
1150 Status = EFI_SUCCESS;
1151
1152 // Restore TPL and return
1153 exit_unlock:
1154 gBS->RestoreTPL (SavedTpl);
1155 return Status;
1156 }
1157
1158 /*
1159 ** UEFI Reset () function
1160 **
1161 */
1162 EFI_STATUS
1163 EFIAPI
SnpReset(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,IN BOOLEAN Verification)1164 SnpReset (
1165 IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
1166 IN BOOLEAN Verification
1167 )
1168 {
1169 LAN91X_DRIVER *LanDriver;
1170 EFI_TPL SavedTpl;
1171 EFI_STATUS Status;
1172
1173 // Check Snp Instance
1174 if (Snp == NULL) {
1175 return EFI_INVALID_PARAMETER;
1176 }
1177
1178 // Serialize access to data and registers
1179 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1180
1181 // Check that driver was started and initialised
1182 switch (Snp->Mode->State) {
1183 case EfiSimpleNetworkInitialized:
1184 break;
1185 case EfiSimpleNetworkStarted:
1186 DEBUG((EFI_D_WARN, "LAN91x: Driver not yet initialized\n"));
1187 ReturnUnlock (EFI_DEVICE_ERROR);
1188 case EfiSimpleNetworkStopped:
1189 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1190 ReturnUnlock (EFI_NOT_STARTED);
1191 default:
1192 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1193 (UINTN)Snp->Mode->State));
1194 ReturnUnlock (EFI_DEVICE_ERROR);
1195 }
1196
1197 // Find the LanDriver structure
1198 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1199
1200 // Initiate a software reset
1201 if (EFI_ERROR (SoftReset (LanDriver))) {
1202 DEBUG((EFI_D_WARN, "LAN91x: Soft reset failed\n"));
1203 ReturnUnlock (EFI_DEVICE_ERROR);
1204 }
1205
1206 // Initiate a PHY reset
1207 if (EFI_ERROR (PhySoftReset (LanDriver))) {
1208 DEBUG((EFI_D_WARN, "LAN91x: PHY soft reset failed\n"));
1209 ReturnUnlock (EFI_DEVICE_ERROR);
1210 }
1211
1212 // Enable the receiver and transmitter
1213 Status = ChipEnable (LanDriver);
1214
1215 // Restore TPL and return
1216 exit_unlock:
1217 gBS->RestoreTPL (SavedTpl);
1218 return Status;
1219 }
1220
1221 /*
1222 ** UEFI Shutdown () function
1223 **
1224 */
1225 EFI_STATUS
1226 EFIAPI
SnpShutdown(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp)1227 SnpShutdown (
1228 IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp
1229 )
1230 {
1231 LAN91X_DRIVER *LanDriver;
1232 EFI_TPL SavedTpl;
1233 EFI_STATUS Status;
1234
1235 // Check Snp Instance
1236 if (Snp == NULL) {
1237 return EFI_INVALID_PARAMETER;
1238 }
1239
1240 // Serialize access to data and registers
1241 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1242
1243 // First check that driver has already been initialized
1244 switch (Snp->Mode->State) {
1245 case EfiSimpleNetworkInitialized:
1246 break;
1247 case EfiSimpleNetworkStarted:
1248 DEBUG((EFI_D_WARN, "LAN91x: Driver not yet initialized\n"));
1249 ReturnUnlock (EFI_DEVICE_ERROR);
1250 case EfiSimpleNetworkStopped:
1251 DEBUG((EFI_D_WARN, "LAN91x: Driver in stopped state\n"));
1252 ReturnUnlock (EFI_NOT_STARTED);
1253 default:
1254 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1255 (UINTN)Snp->Mode->State));
1256 ReturnUnlock (EFI_DEVICE_ERROR);
1257 }
1258
1259 // Find the LanDriver structure
1260 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1261
1262 // Disable the interface
1263 Status = ChipDisable (LanDriver);
1264
1265 // Restore TPL and return
1266 exit_unlock:
1267 gBS->RestoreTPL (SavedTpl);
1268 return Status;
1269 }
1270
1271
1272 /*
1273 ** UEFI ReceiveFilters() function
1274 **
1275 */
1276 EFI_STATUS
1277 EFIAPI
SnpReceiveFilters(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,IN UINT32 Enable,IN UINT32 Disable,IN BOOLEAN Reset,IN UINTN NumMfilter OPTIONAL,IN EFI_MAC_ADDRESS * Mfilter OPTIONAL)1278 SnpReceiveFilters (
1279 IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
1280 IN UINT32 Enable,
1281 IN UINT32 Disable,
1282 IN BOOLEAN Reset,
1283 IN UINTN NumMfilter OPTIONAL,
1284 IN EFI_MAC_ADDRESS *Mfilter OPTIONAL
1285 )
1286 {
1287 #define MCAST_HASH_BYTES 8
1288
1289 LAN91X_DRIVER *LanDriver;
1290 EFI_SIMPLE_NETWORK_MODE *SnpMode;
1291 EFI_TPL SavedTpl;
1292 EFI_STATUS Status;
1293 UINTN i;
1294 UINT32 Crc;
1295 UINT16 RcvCtrl;
1296 UINT8 McastHash[MCAST_HASH_BYTES];
1297
1298 // Check Snp Instance
1299 if (Snp == NULL) {
1300 return EFI_INVALID_PARAMETER;
1301 }
1302
1303 // Serialize access to data and registers
1304 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1305
1306 // First check that driver has already been initialized
1307 switch (Snp->Mode->State) {
1308 case EfiSimpleNetworkInitialized:
1309 break;
1310 case EfiSimpleNetworkStarted:
1311 DEBUG((EFI_D_WARN, "LAN91x: Driver not yet initialized\n"));
1312 ReturnUnlock (EFI_DEVICE_ERROR);
1313 case EfiSimpleNetworkStopped:
1314 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1315 ReturnUnlock (EFI_NOT_STARTED);
1316 default:
1317 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1318 (UINTN)Snp->Mode->State));
1319 ReturnUnlock (EFI_DEVICE_ERROR);
1320 }
1321
1322 // Find the LanDriver structure
1323 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1324 SnpMode = Snp->Mode;
1325
1326 #ifdef LAN91X_PRINT_RECEIVE_FILTERS
1327 DEBUG((EFI_D_ERROR, "LAN91x:SnpReceiveFilters()\n"));
1328 DEBUG((EFI_D_ERROR, " Enable = %08x\n", Enable));
1329 DEBUG((EFI_D_ERROR, " Disable = %08x\n", Disable));
1330 DEBUG((EFI_D_ERROR, " Reset = %d\n", Reset));
1331 DEBUG((EFI_D_ERROR, " NumMfilter = %d\n", NumMfilter));
1332 for (i = 0; i < NumMfilter; ++i) {
1333 DEBUG((EFI_D_ERROR,
1334 " [%2d] = %02x-%02x-%02x-%02x-%02x-%02x\n",
1335 i,
1336 Mfilter[i].Addr[0],
1337 Mfilter[i].Addr[1],
1338 Mfilter[i].Addr[2],
1339 Mfilter[i].Addr[3],
1340 Mfilter[i].Addr[4],
1341 Mfilter[i].Addr[5]));
1342 }
1343 #endif
1344
1345 // Update the Multicast Hash registers
1346 if (Reset) {
1347 // Clear the hash table
1348 SetMem (McastHash, MCAST_HASH_BYTES, 0);
1349 SnpMode->MCastFilterCount = 0;
1350 } else {
1351 // Read the current hash table
1352 for (i = 0; i < MCAST_HASH_BYTES; ++i) {
1353 McastHash[i] = ReadIoReg8 (LanDriver, LAN91X_MT0 + i);
1354 }
1355 // Set the new additions
1356 for (i = 0; i < NumMfilter; ++i) {
1357 Crc = MulticastHash (&Mfilter[i], NET_ETHER_ADDR_LEN);
1358 McastHash[(Crc >> 29) & 0x3] |= 1 << ((Crc >> 26) & 0x3);
1359 }
1360 SnpMode->MCastFilterCount = NumMfilter;
1361 }
1362 // If the hash registers need updating, write them
1363 if (Reset || NumMfilter > 0) {
1364 for (i = 0; i < MCAST_HASH_BYTES; ++i) {
1365 WriteIoReg8 (LanDriver, LAN91X_MT0 + i, McastHash[i]);
1366 }
1367 }
1368
1369 RcvCtrl = ReadIoReg16 (LanDriver, LAN91X_RCR);
1370 if ((Enable & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS) != 0) {
1371 RcvCtrl |= RCR_PRMS;
1372 SnpMode->ReceiveFilterSetting |= EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS;
1373 }
1374 if ((Disable & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS) != 0) {
1375 RcvCtrl &= ~RCR_PRMS;
1376 SnpMode->ReceiveFilterSetting &= ~EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS;
1377 }
1378
1379 if ((Enable & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST) != 0) {
1380 RcvCtrl |= RCR_ALMUL;
1381 SnpMode->ReceiveFilterSetting |= EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST;
1382 }
1383 if ((Disable & EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST) != 0) {
1384 RcvCtrl &= ~RCR_ALMUL;
1385 SnpMode->ReceiveFilterSetting &= ~EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST;
1386 }
1387 WriteIoReg16 (LanDriver, LAN91X_RCR, RcvCtrl);
1388
1389 Status = SetCurrentMacAddress (LanDriver, &SnpMode->CurrentAddress);
1390
1391 // Restore TPL and return
1392 exit_unlock:
1393 gBS->RestoreTPL (SavedTpl);
1394 return Status;
1395 }
1396
1397 /*
1398 ** UEFI StationAddress() function
1399 **
1400 */
1401 EFI_STATUS
1402 EFIAPI
SnpStationAddress(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,IN BOOLEAN Reset,IN EFI_MAC_ADDRESS * NewMac)1403 SnpStationAddress (
1404 IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp,
1405 IN BOOLEAN Reset,
1406 IN EFI_MAC_ADDRESS *NewMac
1407 )
1408 {
1409 LAN91X_DRIVER *LanDriver;
1410 EFI_TPL SavedTpl;
1411 EFI_STATUS Status;
1412
1413 // Check Snp instance
1414 if (Snp == NULL) {
1415 return EFI_INVALID_PARAMETER;
1416 }
1417
1418 // Serialize access to data and registers
1419 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1420
1421 // Check that driver was started and initialised
1422 switch (Snp->Mode->State) {
1423 case EfiSimpleNetworkInitialized:
1424 break;
1425 case EfiSimpleNetworkStarted:
1426 DEBUG((EFI_D_WARN, "LAN91x: Driver not yet initialized\n"));
1427 ReturnUnlock (EFI_DEVICE_ERROR);
1428 case EfiSimpleNetworkStopped:
1429 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1430 ReturnUnlock (EFI_NOT_STARTED);
1431 default:
1432 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1433 (UINTN)Snp->Mode->State));
1434 ReturnUnlock (EFI_DEVICE_ERROR);
1435 }
1436
1437 // Find the LanDriver structure
1438 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1439
1440 if (Reset) {
1441 Snp->Mode->CurrentAddress = Snp->Mode->PermanentAddress;
1442 } else {
1443 if (NewMac == NULL) {
1444 ReturnUnlock (EFI_INVALID_PARAMETER);
1445 }
1446 Snp->Mode->CurrentAddress = *NewMac;
1447 }
1448
1449 Status = SetCurrentMacAddress (LanDriver, &Snp->Mode->CurrentAddress);
1450
1451 // Restore TPL and return
1452 exit_unlock:
1453 gBS->RestoreTPL (SavedTpl);
1454 return Status;
1455 }
1456
1457 /*
1458 ** UEFI Statistics() function
1459 **
1460 */
1461 EFI_STATUS
1462 EFIAPI
SnpStatistics(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,IN BOOLEAN Reset,IN OUT UINTN * StatSize,OUT EFI_NETWORK_STATISTICS * Statistics)1463 SnpStatistics (
1464 IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
1465 IN BOOLEAN Reset,
1466 IN OUT UINTN *StatSize,
1467 OUT EFI_NETWORK_STATISTICS *Statistics
1468 )
1469 {
1470 LAN91X_DRIVER *LanDriver;
1471 EFI_TPL SavedTpl;
1472 EFI_STATUS Status;
1473
1474 // Check Snp instance
1475 if (Snp == NULL) {
1476 return EFI_INVALID_PARAMETER;
1477 }
1478
1479 // Check pointless condition
1480 if ((!Reset) && (StatSize == NULL) && (Statistics == NULL)) {
1481 return EFI_SUCCESS;
1482 }
1483
1484 // Check the parameters
1485 if ((StatSize == NULL) && (Statistics != NULL)) {
1486 return EFI_INVALID_PARAMETER;
1487 }
1488
1489 // Serialize access to data and registers
1490 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1491
1492 // Check that driver was started and initialised
1493 switch (Snp->Mode->State) {
1494 case EfiSimpleNetworkInitialized:
1495 break;
1496 case EfiSimpleNetworkStarted:
1497 DEBUG((EFI_D_WARN, "LAN91x: Driver not yet initialized\n"));
1498 ReturnUnlock (EFI_DEVICE_ERROR);
1499 case EfiSimpleNetworkStopped:
1500 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1501 ReturnUnlock (EFI_NOT_STARTED);
1502 default:
1503 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1504 (UINTN)Snp->Mode->State));
1505 ReturnUnlock (EFI_DEVICE_ERROR);
1506 }
1507
1508 // Find the LanDriver structure
1509 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1510
1511 // Do a reset if required
1512 if (Reset) {
1513 ZeroMem (&LanDriver->Stats, sizeof(EFI_NETWORK_STATISTICS));
1514 }
1515
1516 // Check buffer size
1517 if (*StatSize < sizeof(EFI_NETWORK_STATISTICS)) {
1518 *StatSize = sizeof(EFI_NETWORK_STATISTICS);
1519 ReturnUnlock (EFI_BUFFER_TOO_SMALL);
1520 goto exit_unlock;
1521 }
1522
1523 // Fill in the statistics
1524 CopyMem(&Statistics, &LanDriver->Stats, sizeof(EFI_NETWORK_STATISTICS));
1525 Status = EFI_SUCCESS;
1526
1527 // Restore TPL and return
1528 exit_unlock:
1529 gBS->RestoreTPL (SavedTpl);
1530 return Status;
1531 }
1532
1533 /*
1534 ** UEFI MCastIPtoMAC() function
1535 **
1536 */
1537 EFI_STATUS
1538 EFIAPI
SnpMcastIptoMac(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,IN BOOLEAN IsIpv6,IN EFI_IP_ADDRESS * Ip,OUT EFI_MAC_ADDRESS * McastMac)1539 SnpMcastIptoMac (
1540 IN EFI_SIMPLE_NETWORK_PROTOCOL* Snp,
1541 IN BOOLEAN IsIpv6,
1542 IN EFI_IP_ADDRESS *Ip,
1543 OUT EFI_MAC_ADDRESS *McastMac
1544 )
1545 {
1546 // Check Snp instance
1547 if (Snp == NULL) {
1548 return EFI_INVALID_PARAMETER;
1549 }
1550
1551 // Check parameters
1552 if ((McastMac == NULL) || (Ip == NULL)) {
1553 return EFI_INVALID_PARAMETER;
1554 }
1555
1556 // Make sure MAC address is empty
1557 ZeroMem (McastMac, sizeof(EFI_MAC_ADDRESS));
1558
1559 // If we need ipv4 address
1560 if (!IsIpv6) {
1561 // Most significant 25 bits of a multicast HW address are set
1562 McastMac->Addr[0] = 0x01;
1563 McastMac->Addr[1] = 0x00;
1564 McastMac->Addr[2] = 0x5E;
1565
1566 // Lower 23 bits from ipv4 address
1567 McastMac->Addr[3] = (Ip->v4.Addr[1] & 0x7F); // Clear the ms bit (25th bit of MAC must be 0)
1568 McastMac->Addr[4] = Ip->v4.Addr[2];
1569 McastMac->Addr[5] = Ip->v4.Addr[3];
1570 } else {
1571 // Most significant 16 bits of multicast v6 HW address are set
1572 McastMac->Addr[0] = 0x33;
1573 McastMac->Addr[1] = 0x33;
1574
1575 // lower four octets are taken from ipv6 address
1576 McastMac->Addr[2] = Ip->v6.Addr[8];
1577 McastMac->Addr[3] = Ip->v6.Addr[9];
1578 McastMac->Addr[4] = Ip->v6.Addr[10];
1579 McastMac->Addr[5] = Ip->v6.Addr[11];
1580 }
1581
1582 return EFI_SUCCESS;
1583 }
1584
1585 /*
1586 ** UEFI NvData() function
1587 **
1588 */
1589 EFI_STATUS
1590 EFIAPI
SnpNvData(IN EFI_SIMPLE_NETWORK_PROTOCOL * pobj,IN BOOLEAN read_write,IN UINTN offset,IN UINTN buff_size,IN OUT VOID * data)1591 SnpNvData (
1592 IN EFI_SIMPLE_NETWORK_PROTOCOL* pobj,
1593 IN BOOLEAN read_write,
1594 IN UINTN offset,
1595 IN UINTN buff_size,
1596 IN OUT VOID *data
1597 )
1598 {
1599 DEBUG((EFI_D_ERROR, "LAN91x: Non-volatile storage not supported\n"));
1600
1601 return EFI_UNSUPPORTED;
1602 }
1603
1604
1605 /*
1606 ** UEFI GetStatus () function
1607 **
1608 */
1609 EFI_STATUS
1610 EFIAPI
SnpGetStatus(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,OUT UINT32 * IrqStat OPTIONAL,OUT VOID ** TxBuff OPTIONAL)1611 SnpGetStatus (
1612 IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp,
1613 OUT UINT32 *IrqStat OPTIONAL,
1614 OUT VOID **TxBuff OPTIONAL
1615 )
1616 {
1617 LAN91X_DRIVER *LanDriver;
1618 EFI_TPL SavedTpl;
1619 EFI_STATUS Status;
1620 BOOLEAN MediaPresent;
1621 UINT8 IstReg;
1622 MSK_LINKED_SYSTEM_BUF *LinkedTXRecycleBuff;
1623
1624 // Check preliminaries
1625 if (Snp == NULL) {
1626 return EFI_INVALID_PARAMETER;
1627 }
1628
1629 // Serialize access to data and registers
1630 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1631
1632 // Check that driver was started and initialised
1633 switch (Snp->Mode->State) {
1634 case EfiSimpleNetworkInitialized:
1635 break;
1636 case EfiSimpleNetworkStarted:
1637 DEBUG((EFI_D_WARN, "LAN91x: Driver not yet initialized\n"));
1638 ReturnUnlock (EFI_DEVICE_ERROR);
1639 case EfiSimpleNetworkStopped:
1640 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1641 ReturnUnlock (EFI_NOT_STARTED);
1642 default:
1643 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1644 (UINTN)Snp->Mode->State));
1645 ReturnUnlock (EFI_DEVICE_ERROR);
1646 }
1647
1648 // Find the LanDriver structure
1649 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1650
1651 // Arbitrarily set the interrupt status to 0
1652 if (IrqStat != NULL) {
1653 *IrqStat = 0;
1654 IstReg = ReadIoReg8 (LanDriver, LAN91X_IST);
1655 if ((IstReg & IST_RCV) != 0) {
1656 *IrqStat |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;
1657 }
1658 if ((IstReg & IST_TX) != 0) {
1659 *IrqStat |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;
1660 }
1661 }
1662
1663 // Pass back the completed buffer address
1664 // The transmit buffer status is not read when TxBuf is NULL
1665 if (TxBuff != NULL) {
1666 *((UINT8 **) TxBuff) = (UINT8 *) 0;
1667 if( !IsListEmpty (&LanDriver->TransmitQueueHead))
1668 {
1669 LinkedTXRecycleBuff = CR (GetFirstNode (&LanDriver->TransmitQueueHead), MSK_LINKED_SYSTEM_BUF, Link, TX_MBUF_SIGNATURE);
1670 if(LinkedTXRecycleBuff != NULL) {
1671 *TxBuff = LinkedTXRecycleBuff->SystemBuf.Buf;
1672 RemoveEntryList (&LinkedTXRecycleBuff->Link);
1673 FreePool (LinkedTXRecycleBuff);
1674 }
1675 }
1676 }
1677
1678 // Update the media status
1679 MediaPresent = CheckLinkStatus (LanDriver);
1680 if (MediaPresent != Snp->Mode->MediaPresent) {
1681 DEBUG((EFI_D_WARN, "LAN91x: Link %s\n", MediaPresent ? L"up" : L"down"));
1682 }
1683 Snp->Mode->MediaPresent = MediaPresent;
1684 Status = EFI_SUCCESS;
1685
1686 // Restore TPL and return
1687 exit_unlock:
1688 gBS->RestoreTPL (SavedTpl);
1689 return Status;
1690 }
1691
1692
1693 /*
1694 ** UEFI Transmit() function
1695 **
1696 */
1697 EFI_STATUS
1698 EFIAPI
SnpTransmit(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,IN UINTN HdrSize,IN UINTN BufSize,IN VOID * BufAddr,IN EFI_MAC_ADDRESS * SrcAddr OPTIONAL,IN EFI_MAC_ADDRESS * DstAddr OPTIONAL,IN UINT16 * Protocol OPTIONAL)1699 SnpTransmit (
1700 IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp,
1701 IN UINTN HdrSize,
1702 IN UINTN BufSize,
1703 IN VOID *BufAddr,
1704 IN EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
1705 IN EFI_MAC_ADDRESS *DstAddr OPTIONAL,
1706 IN UINT16 *Protocol OPTIONAL
1707 )
1708 {
1709 LAN91X_DRIVER *LanDriver;
1710 EFI_TPL SavedTpl;
1711 EFI_STATUS Status;
1712 UINT8 *Ptr;
1713 UINTN Len;
1714 UINTN MmuPages;
1715 UINTN Retries;
1716 UINT16 Proto;
1717 UINT8 PktNum;
1718 MSK_LINKED_SYSTEM_BUF *LinkedTXRecycleBuff;
1719
1720
1721 // Check preliminaries
1722 if ((Snp == NULL) || (BufAddr == NULL)) {
1723 DEBUG((EFI_D_ERROR, "LAN91x: SnpTransmit(): NULL Snp (%p) or BufAddr (%p)\n",
1724 Snp, BufAddr));
1725 return EFI_INVALID_PARAMETER;
1726 }
1727
1728 // Serialize access to data and registers
1729 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1730
1731 // Check that driver was started and initialised
1732 switch (Snp->Mode->State) {
1733 case EfiSimpleNetworkInitialized:
1734 break;
1735 case EfiSimpleNetworkStarted:
1736 DEBUG((EFI_D_WARN, "LAN91x: Driver not yet initialized\n"));
1737 ReturnUnlock (EFI_DEVICE_ERROR);
1738 case EfiSimpleNetworkStopped:
1739 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1740 ReturnUnlock (EFI_NOT_STARTED);
1741 default:
1742 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1743 (UINTN)Snp->Mode->State));
1744 ReturnUnlock (EFI_DEVICE_ERROR);
1745 }
1746
1747 // Find the LanDriver structure
1748 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1749
1750 // Ensure header is correct size if non-zero
1751 if (HdrSize != 0) {
1752 if (HdrSize != Snp->Mode->MediaHeaderSize) {
1753 DEBUG((EFI_D_ERROR, "LAN91x: SnpTransmit(): Invalid HdrSize %d\n", HdrSize));
1754 ReturnUnlock (EFI_INVALID_PARAMETER);
1755 }
1756
1757 if ((DstAddr == NULL) || (Protocol == NULL)) {
1758 DEBUG((EFI_D_ERROR, "LAN91x: SnpTransmit(): NULL DstAddr %p or Protocol %p\n",
1759 DstAddr, Protocol));
1760 ReturnUnlock (EFI_INVALID_PARAMETER);
1761 }
1762 }
1763
1764 // Before transmitting check the link status
1765 if (!Snp->Mode->MediaPresent) {
1766 DEBUG((EFI_D_WARN, "LAN91x: SnpTransmit(): Link not ready\n"));
1767 ReturnUnlock (EFI_NOT_READY);
1768 }
1769
1770 // Calculate the request size in 256-byte "pages" minus 1
1771 // The 91C111 ignores this, but some older devices need it.
1772 MmuPages = ((BufSize & ~1) + LAN91X_PKT_OVERHEAD - 1) >> 8;
1773 if (MmuPages > 7) {
1774 DEBUG((EFI_D_WARN, "LAN91x: Tx buffer too large (%d bytes)\n", BufSize));
1775 LanDriver->Stats.TxOversizeFrames += 1;
1776 LanDriver->Stats.TxDroppedFrames += 1;
1777 ReturnUnlock (EFI_BAD_BUFFER_SIZE);
1778 }
1779
1780 // Request allocation of a transmit buffer
1781 Status = MmuOperation (LanDriver, MMUCR_OP_TX_ALLOC | MmuPages);
1782 if (EFI_ERROR (Status)) {
1783 DEBUG((EFI_D_ERROR, "LAN91x: Tx buffer request failure: %d\n", Status));
1784 ReturnUnlock (EFI_DEVICE_ERROR);
1785 }
1786
1787 // Wait for allocation request completion
1788 Retries = LAN91X_MEMORY_ALLOC_POLLS;
1789 while ((ReadIoReg8 (LanDriver, LAN91X_IST) & IST_ALLOC) == 0) {
1790 if (--Retries == 0) {
1791 DEBUG((EFI_D_ERROR, "LAN91x: Tx buffer allocation timeout\n"));
1792 ReturnUnlock (EFI_TIMEOUT);
1793 }
1794 }
1795
1796 // Check for successful allocation
1797 PktNum = ReadIoReg8 (LanDriver, LAN91X_ARR);
1798 if ((PktNum & ARR_FAILED) != 0) {
1799 DEBUG((EFI_D_ERROR, "LAN91x: Tx buffer allocation failure: %02x\n", PktNum));
1800 ReturnUnlock (EFI_NOT_READY);
1801 }
1802 PktNum &= ARR_PACKET;
1803
1804 // Check for the nature of the frame
1805 // If no destination address, it's ARP broadcast
1806 if(DstAddr != NULL)
1807 {
1808 if (DstAddr->Addr[0] == 0xFF) {
1809 LanDriver->Stats.TxBroadcastFrames += 1;
1810 } else if ((DstAddr->Addr[0] & 0x1) == 1) {
1811 LanDriver->Stats.TxMulticastFrames += 1;
1812 } else {
1813 LanDriver->Stats.TxUnicastFrames += 1;
1814 }
1815 } else {
1816 LanDriver->Stats.TxBroadcastFrames += 1;
1817 }
1818
1819 // Set the Packet Number and Pointer registers
1820 WriteIoReg8 (LanDriver, LAN91X_PNR, PktNum);
1821 WriteIoReg16 (LanDriver, LAN91X_PTR, PTR_AUTO_INCR);
1822
1823 // Set up mutable buffer information variables
1824 Ptr = BufAddr;
1825 Len = BufSize;
1826
1827 // Write Status and Byte Count first
1828 WriteIoReg16 (LanDriver, LAN91X_DATA0, 0);
1829 WriteIoReg16 (LanDriver, LAN91X_DATA0, (Len + LAN91X_PKT_OVERHEAD) & BCW_COUNT);
1830
1831 // This packet may come with a preconfigured Ethernet header.
1832 // If not, we need to construct one from optional parameters.
1833 if (HdrSize) {
1834
1835 // Write the destination address
1836 WriteIoData (LanDriver, DstAddr, NET_ETHER_ADDR_LEN);
1837
1838 // Write the Source Address
1839 if (SrcAddr != NULL) {
1840 WriteIoData (LanDriver, SrcAddr, NET_ETHER_ADDR_LEN);
1841 } else {
1842 WriteIoData (LanDriver, &LanDriver->SnpMode.CurrentAddress, NET_ETHER_ADDR_LEN);
1843 }
1844
1845 // Write the Protocol word
1846 Proto = HTONS (*Protocol);
1847 WriteIoReg16 (LanDriver, LAN91X_DATA0, Proto);
1848
1849 // Adjust the data start and length
1850 Ptr += sizeof(ETHER_HEAD);
1851 Len -= sizeof(ETHER_HEAD);
1852 }
1853
1854 // Copy the remainder data buffer, except the odd byte
1855 WriteIoData (LanDriver, Ptr, Len & ~1);
1856 Ptr += Len & ~1;
1857 Len &= 1;
1858
1859 // Write the Packet Control Word and odd byte
1860 WriteIoReg16 (LanDriver, LAN91X_DATA0,
1861 (Len != 0) ? (PCW_ODD | PCW_CRC | *Ptr) : PCW_CRC);
1862
1863 // Release the packet for transmission
1864 Status = MmuOperation (LanDriver, MMUCR_OP_TX_PUSH);
1865 if (EFI_ERROR (Status)) {
1866 DEBUG((EFI_D_ERROR, "LAN91x: Tx buffer release failure: %d\n", Status));
1867 ReturnUnlock (EFI_DEVICE_ERROR);
1868 }
1869
1870 // Update the Tx statistics
1871 LanDriver->Stats.TxTotalBytes += BufSize;
1872 LanDriver->Stats.TxGoodFrames += 1;
1873
1874 // Update the Tx Buffer cache
1875 LinkedTXRecycleBuff = AllocateZeroPool (sizeof (MSK_LINKED_SYSTEM_BUF));
1876 if (LinkedTXRecycleBuff == NULL) {
1877 return EFI_OUT_OF_RESOURCES;
1878 }
1879 LinkedTXRecycleBuff->Signature = TX_MBUF_SIGNATURE;
1880 //
1881 // Add the passed Buffer to the transmit queue. Don't copy.
1882 //
1883 LinkedTXRecycleBuff->SystemBuf.Buf = BufAddr;
1884 LinkedTXRecycleBuff->SystemBuf.Length = BufSize;
1885 InsertTailList (&LanDriver->TransmitQueueHead, &LinkedTXRecycleBuff->Link);
1886
1887 Status = EFI_SUCCESS;
1888
1889 // Dump the packet header
1890 #if LAN91X_PRINT_PACKET_HEADERS
1891 Ptr = BufAddr;
1892 DEBUG((EFI_D_ERROR, "LAN91X:SnpTransmit()\n"));
1893 DEBUG((EFI_D_ERROR, " HdrSize: %d, SrcAddr: %p, Length: %d, Last byte: %02x\n",
1894 HdrSize, SrcAddr, BufSize, Ptr[BufSize - 1]));
1895 PrintIpDgram (
1896 (HdrSize == 0) ? (EFI_MAC_ADDRESS *)&Ptr[0] : DstAddr,
1897 (HdrSize == 0) ? (EFI_MAC_ADDRESS *)&Ptr[6] : (SrcAddr != NULL) ? SrcAddr : &LanDriver->SnpMode.CurrentAddress,
1898 (HdrSize == 0) ? (UINT16 *)&Ptr[12] : &Proto,
1899 &Ptr[14]
1900 );
1901 #endif
1902
1903 // Restore TPL and return
1904 exit_unlock:
1905 gBS->RestoreTPL (SavedTpl);
1906 return Status;
1907 }
1908
1909
1910 /*
1911 ** UEFI Receive() function
1912 **
1913 */
1914 EFI_STATUS
1915 EFIAPI
SnpReceive(IN EFI_SIMPLE_NETWORK_PROTOCOL * Snp,OUT UINTN * HdrSize OPTIONAL,IN OUT UINTN * BuffSize,OUT VOID * Data,OUT EFI_MAC_ADDRESS * SrcAddr OPTIONAL,OUT EFI_MAC_ADDRESS * DstAddr OPTIONAL,OUT UINT16 * Protocol OPTIONAL)1916 SnpReceive (
1917 IN EFI_SIMPLE_NETWORK_PROTOCOL *Snp,
1918 OUT UINTN *HdrSize OPTIONAL,
1919 IN OUT UINTN *BuffSize,
1920 OUT VOID *Data,
1921 OUT EFI_MAC_ADDRESS *SrcAddr OPTIONAL,
1922 OUT EFI_MAC_ADDRESS *DstAddr OPTIONAL,
1923 OUT UINT16 *Protocol OPTIONAL
1924 )
1925 {
1926 EFI_TPL SavedTpl;
1927 EFI_STATUS Status;
1928 LAN91X_DRIVER *LanDriver;
1929 UINT8 *DataPtr;
1930 UINT16 PktStatus;
1931 UINT16 PktLength;
1932 UINT16 PktControl;
1933 UINT8 IstReg;
1934
1935 // Check preliminaries
1936 if ((Snp == NULL) || (Data == NULL)) {
1937 return EFI_INVALID_PARAMETER;
1938 }
1939
1940 // Serialize access to data and registers
1941 SavedTpl = gBS->RaiseTPL (LAN91X_TPL);
1942
1943 // Check that driver was started and initialised
1944 switch (Snp->Mode->State) {
1945 case EfiSimpleNetworkInitialized:
1946 break;
1947 case EfiSimpleNetworkStarted:
1948 DEBUG((EFI_D_WARN, "LAN91x: Driver not yet initialized\n"));
1949 ReturnUnlock (EFI_DEVICE_ERROR);
1950 case EfiSimpleNetworkStopped:
1951 DEBUG((EFI_D_WARN, "LAN91x: Driver not started\n"));
1952 ReturnUnlock (EFI_NOT_STARTED);
1953 default:
1954 DEBUG((EFI_D_ERROR, "LAN91x: Driver in an invalid state: %u\n",
1955 (UINTN)Snp->Mode->State));
1956 ReturnUnlock (EFI_DEVICE_ERROR);
1957 }
1958
1959 // Find the LanDriver structure
1960 LanDriver = INSTANCE_FROM_SNP_THIS(Snp);
1961
1962 // Check for Rx Overrun
1963 IstReg = ReadIoReg8 (LanDriver, LAN91X_IST);
1964 if ((IstReg & IST_RX_OVRN) != 0) {
1965 LanDriver->Stats.RxTotalFrames += 1;
1966 LanDriver->Stats.RxDroppedFrames += 1;
1967 WriteIoReg8 (LanDriver, LAN91X_IST, IST_RX_OVRN);
1968 DEBUG((EFI_D_WARN, "LAN91x: Receiver overrun\n"));
1969 }
1970
1971 // Check for Rx data available
1972 if ((IstReg & IST_RCV) == 0) {
1973 ReturnUnlock (EFI_NOT_READY);
1974 }
1975
1976 // Configure the PTR register for reading
1977 WriteIoReg16 (LanDriver, LAN91X_PTR, PTR_RCV | PTR_AUTO_INCR | PTR_READ);
1978
1979 // Read the Packet Status and Packet Length words
1980 PktStatus = ReadIoReg16 (LanDriver, LAN91X_DATA0);
1981 PktLength = ReadIoReg16 (LanDriver, LAN91X_DATA0) & BCW_COUNT;
1982
1983 // Check for valid received packet
1984 if ((PktStatus == 0) && (PktLength == 0)) {
1985 DEBUG((EFI_D_WARN, "LAN91x: Received zero-length packet. IST=%04x\n", IstReg));
1986 ReturnUnlock (EFI_NOT_READY);
1987 }
1988 LanDriver->Stats.RxTotalFrames += 1;
1989
1990 // Check if we got a CRC error
1991 if ((PktStatus & RX_BAD_CRC) != 0) {
1992 DEBUG((EFI_D_WARN, "LAN91x: Received frame CRC error\n"));
1993 LanDriver->Stats.RxCrcErrorFrames += 1;
1994 LanDriver->Stats.RxDroppedFrames += 1;
1995 Status = EFI_DEVICE_ERROR;
1996 goto exit_release;
1997 }
1998
1999 // Check if we got a too-short frame
2000 if ((PktStatus & RX_TOO_SHORT) != 0) {
2001 DEBUG((EFI_D_WARN, "LAN91x: Received frame too short (%d bytes)\n", PktLength));
2002 LanDriver->Stats.RxUndersizeFrames += 1;
2003 LanDriver->Stats.RxDroppedFrames += 1;
2004 Status = EFI_DEVICE_ERROR;
2005 goto exit_release;
2006 }
2007
2008 // Check if we got a too-long frame
2009 if ((PktStatus & RX_TOO_LONG) != 0) {
2010 DEBUG((EFI_D_WARN, "LAN91x: Received frame too long (%d bytes)\n", PktLength));
2011 LanDriver->Stats.RxOversizeFrames += 1;
2012 LanDriver->Stats.RxDroppedFrames += 1;
2013 Status = EFI_DEVICE_ERROR;
2014 goto exit_release;
2015 }
2016
2017 // Check if we got an alignment error
2018 if ((PktStatus & RX_ALGN_ERR) != 0) {
2019 DEBUG((EFI_D_WARN, "LAN91x: Received frame alignment error\n"));
2020 // Don't seem to keep track of these specifically
2021 LanDriver->Stats.RxDroppedFrames += 1;
2022 Status = EFI_DEVICE_ERROR;
2023 goto exit_release;
2024 }
2025
2026 // Classify the received fram
2027 if ((PktStatus & RX_MULTICAST) != 0) {
2028 LanDriver->Stats.RxMulticastFrames += 1;
2029 } else if ((PktStatus & RX_BROADCAST) != 0) {
2030 LanDriver->Stats.RxBroadcastFrames += 1;
2031 } else {
2032 LanDriver->Stats.RxUnicastFrames += 1;
2033 }
2034
2035 // Calculate the received packet data length
2036 PktLength -= LAN91X_PKT_OVERHEAD;
2037 if ((PktStatus & RX_ODD_FRAME) != 0) {
2038 PktLength += 1;
2039 }
2040
2041 // Check buffer size
2042 if (*BuffSize < PktLength) {
2043 DEBUG((EFI_D_WARN, "LAN91x: Receive buffer too small for packet (%d < %d)\n",
2044 *BuffSize, PktLength));
2045 *BuffSize = PktLength;
2046 Status = EFI_BUFFER_TOO_SMALL;
2047 goto exit_release;
2048 }
2049
2050 // Transfer the data bytes
2051 DataPtr = Data;
2052 ReadIoData (LanDriver, DataPtr, PktLength & ~0x0001);
2053
2054 // Read the PktControl and Odd Byte from the FIFO
2055 PktControl = ReadIoReg16 (LanDriver, LAN91X_DATA0);
2056 if ((PktControl & PCW_ODD) != 0) {
2057 DataPtr[PktLength - 1] = PktControl & PCW_ODD_BYTE;
2058 }
2059
2060 // Update buffer size
2061 *BuffSize = PktLength;
2062
2063 if (HdrSize != NULL) {
2064 *HdrSize = LanDriver->SnpMode.MediaHeaderSize;
2065 }
2066
2067 // Extract the destination address
2068 if (DstAddr != NULL) {
2069 CopyMem (DstAddr, &DataPtr[0], NET_ETHER_ADDR_LEN);
2070 }
2071
2072 // Get the source address
2073 if (SrcAddr != NULL) {
2074 CopyMem (SrcAddr, &DataPtr[6], NET_ETHER_ADDR_LEN);
2075 }
2076
2077 // Get the protocol
2078 if (Protocol != NULL) {
2079 *Protocol = NTOHS (*(UINT16*)(&DataPtr[12]));
2080 }
2081
2082 // Update the Rx statistics
2083 LanDriver->Stats.RxTotalBytes += PktLength;
2084 LanDriver->Stats.RxGoodFrames += 1;
2085 Status = EFI_SUCCESS;
2086
2087 #if LAN91X_PRINT_PACKET_HEADERS
2088 // Dump the packet header
2089 DEBUG((EFI_D_ERROR, "LAN91X:SnpReceive()\n"));
2090 DEBUG((EFI_D_ERROR, " HdrSize: %p, SrcAddr: %p, DstAddr: %p, Protocol: %p\n",
2091 HdrSize, SrcAddr, DstAddr, Protocol));
2092 DEBUG((EFI_D_ERROR, " Length: %d, Last byte: %02x\n", PktLength, DataPtr[PktLength - 1]));
2093 PrintIpDgram (&DataPtr[0], &DataPtr[6], &DataPtr[12], &DataPtr[14]);
2094 #endif
2095
2096 // Release the FIFO buffer
2097 exit_release:
2098 MmuOperation (LanDriver, MMUCR_OP_RX_POP_REL);
2099
2100 // Restore TPL and return
2101 exit_unlock:
2102 gBS->RestoreTPL (SavedTpl);
2103 return Status;
2104 }
2105
2106
2107 /*------------------ Driver Execution Environment main entry point ------------------*/
2108
2109 /*
2110 ** Entry point for the LAN91x driver
2111 **
2112 */
2113 EFI_STATUS
Lan91xDxeEntry(IN EFI_HANDLE Handle,IN EFI_SYSTEM_TABLE * SystemTable)2114 Lan91xDxeEntry (
2115 IN EFI_HANDLE Handle,
2116 IN EFI_SYSTEM_TABLE *SystemTable
2117 )
2118 {
2119 EFI_STATUS Status;
2120 LAN91X_DRIVER *LanDriver;
2121 EFI_SIMPLE_NETWORK_PROTOCOL *Snp;
2122 EFI_SIMPLE_NETWORK_MODE *SnpMode;
2123 LAN91X_DEVICE_PATH *Lan91xPath;
2124
2125 // The PcdLan91xDxeBaseAddress PCD must be defined
2126 ASSERT(PcdGet32 (PcdLan91xDxeBaseAddress) != 0);
2127
2128 // Allocate Resources
2129 LanDriver = AllocateZeroPool (sizeof(LAN91X_DRIVER));
2130 Lan91xPath = AllocateCopyPool (sizeof(LAN91X_DEVICE_PATH), &Lan91xPathTemplate);
2131
2132 // Initialize I/O Space access info
2133 LanDriver->IoBase = PcdGet32 (PcdLan91xDxeBaseAddress);
2134 LanDriver->PhyAd = LAN91X_NO_PHY;
2135 LanDriver->BankSel = 0xff;
2136
2137 // Initialize pointers
2138 Snp = &(LanDriver->Snp);
2139 SnpMode = &(LanDriver->SnpMode);
2140 Snp->Mode = SnpMode;
2141
2142 // Set the signature of the LAN Driver structure
2143 LanDriver->Signature = LAN91X_SIGNATURE;
2144
2145 // Probe the device
2146 Status = Probe (LanDriver);
2147 if (EFI_ERROR(Status)) {
2148 DEBUG((EFI_D_ERROR, "LAN91x:Lan91xDxeEntry(): Probe failed with status %d\n", Status));
2149 return Status;
2150 }
2151
2152 #ifdef LAN91X_PRINT_REGISTERS
2153 PrintIoRegisters (LanDriver);
2154 PrintPhyRegisters (LanDriver);
2155 #endif
2156
2157 // Initialize transmit queue
2158 InitializeListHead (&LanDriver->TransmitQueueHead);
2159
2160 // Assign fields and func pointers
2161 Snp->Revision = EFI_SIMPLE_NETWORK_PROTOCOL_REVISION;
2162 Snp->WaitForPacket = NULL;
2163 Snp->Initialize = SnpInitialize;
2164 Snp->Start = SnpStart;
2165 Snp->Stop = SnpStop;
2166 Snp->Reset = SnpReset;
2167 Snp->Shutdown = SnpShutdown;
2168 Snp->ReceiveFilters = SnpReceiveFilters;
2169 Snp->StationAddress = SnpStationAddress;
2170 Snp->Statistics = SnpStatistics;
2171 Snp->MCastIpToMac = SnpMcastIptoMac;
2172 Snp->NvData = SnpNvData;
2173 Snp->GetStatus = SnpGetStatus;
2174 Snp->Transmit = SnpTransmit;
2175 Snp->Receive = SnpReceive;
2176
2177 // Fill in simple network mode structure
2178 SnpMode->State = EfiSimpleNetworkStopped;
2179 SnpMode->HwAddressSize = NET_ETHER_ADDR_LEN; // HW address is 6 bytes
2180 SnpMode->MediaHeaderSize = sizeof(ETHER_HEAD); // Size of an Ethernet header
2181 SnpMode->MaxPacketSize = EFI_PAGE_SIZE; // Ethernet Frame (with VLAN tag +4 bytes)
2182
2183 // Supported receive filters
2184 SnpMode->ReceiveFilterMask = EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
2185 EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST |
2186 EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST |
2187 EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS |
2188 EFI_SIMPLE_NETWORK_RECEIVE_PROMISCUOUS_MULTICAST;
2189
2190 // Initially-enabled receive filters
2191 SnpMode->ReceiveFilterSetting = EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
2192 EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST |
2193 EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST;
2194
2195 // LAN91x has 64bit hash table. We can filter an infinite MACs, but
2196 // higher-level software must filter out any hash collisions.
2197 SnpMode->MaxMCastFilterCount = MAX_MCAST_FILTER_CNT;
2198 SnpMode->MCastFilterCount = 0;
2199 ZeroMem (&SnpMode->MCastFilter, MAX_MCAST_FILTER_CNT * sizeof(EFI_MAC_ADDRESS));
2200
2201 // Set the interface type (1: Ethernet or 6: IEEE 802 Networks)
2202 SnpMode->IfType = NET_IFTYPE_ETHERNET;
2203
2204 // Mac address is changeable
2205 SnpMode->MacAddressChangeable = TRUE;
2206
2207 // We can only transmit one packet at a time
2208 SnpMode->MultipleTxSupported = FALSE;
2209
2210 // MediaPresent checks for cable connection and partner link
2211 SnpMode->MediaPresentSupported = TRUE;
2212 SnpMode->MediaPresent = FALSE;
2213
2214 // Set broadcast address
2215 SetMem (&SnpMode->BroadcastAddress, sizeof (EFI_MAC_ADDRESS), 0xFF);
2216
2217 // Assign fields for device path
2218 Lan91xPath->Lan91x.MacAddress = SnpMode->PermanentAddress;
2219 Lan91xPath->Lan91x.IfType = SnpMode->IfType;
2220
2221 // Initialise the protocol
2222 Status = gBS->InstallMultipleProtocolInterfaces (
2223 &LanDriver->ControllerHandle,
2224 &gEfiSimpleNetworkProtocolGuid, Snp,
2225 &gEfiDevicePathProtocolGuid, Lan91xPath,
2226 NULL
2227 );
2228
2229 // Say what the status of loading the protocol structure is
2230 if (EFI_ERROR(Status)) {
2231 FreePool (LanDriver);
2232 }
2233
2234 return Status;
2235 }
2236