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authorshemminger@osdl.org <shemminger@osdl.org>2005-11-24 01:00:49 -0500
committerJeff Garzik <jgarzik@pobox.com>2005-12-01 02:22:03 -0500
commit596f86a8d8a70005728944143f08fe5414443355 (patch)
tree4d03416456411b74fbdcdbf944d81b37f8552496
parenta174fd88d2b73c1933ea24ed533354d618c7d089 (diff)
[PATCH] sk98lin: fix checksumming code
Remove code from sk98lin that does it's own checksum validation. This code is incorrect when dealing with nested protocols like VLAN's, and it is better to use regular receive code path to handle hardware checksum. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat
-rw-r--r--drivers/net/sk98lin/Makefile5
-rw-r--r--drivers/net/sk98lin/h/skdrv2nd.h4
-rw-r--r--drivers/net/sk98lin/skcsum.c871
-rw-r--r--drivers/net/sk98lin/skge.c165
4 files changed, 38 insertions, 1007 deletions
diff --git a/drivers/net/sk98lin/Makefile b/drivers/net/sk98lin/Makefile
index 6783039ffb75..7653d6e33aa2 100644
--- a/drivers/net/sk98lin/Makefile
+++ b/drivers/net/sk98lin/Makefile
@@ -27,8 +27,7 @@ sk98lin-objs := \
27 sktimer.o \ 27 sktimer.o \
28 skvpd.o \ 28 skvpd.o \
29 skxmac2.o \ 29 skxmac2.o \
30 skproc.o \ 30 skproc.o
31 skcsum.o
32 31
33# DBGDEF = \ 32# DBGDEF = \
34# -DDEBUG 33# -DDEBUG
@@ -77,7 +76,7 @@ endif
77# SK_DBGCAT_DRV_INT_SRC 0x04000000 interrupts sources 76# SK_DBGCAT_DRV_INT_SRC 0x04000000 interrupts sources
78# SK_DBGCAT_DRV_EVENT 0x08000000 driver events 77# SK_DBGCAT_DRV_EVENT 0x08000000 driver events
79 78
80EXTRA_CFLAGS += -Idrivers/net/sk98lin -DSK_DIAG_SUPPORT -DSK_USE_CSUM -DGENESIS -DYUKON $(DBGDEF) $(SKPARAM) 79EXTRA_CFLAGS += -Idrivers/net/sk98lin -DSK_DIAG_SUPPORT -DGENESIS -DYUKON $(DBGDEF) $(SKPARAM)
81 80
82clean: 81clean:
83 rm -f core *.o *.a *.s 82 rm -f core *.o *.a *.s
diff --git a/drivers/net/sk98lin/h/skdrv2nd.h b/drivers/net/sk98lin/h/skdrv2nd.h
index 542cec57f86a..2dc5728e3ef6 100644
--- a/drivers/net/sk98lin/h/skdrv2nd.h
+++ b/drivers/net/sk98lin/h/skdrv2nd.h
@@ -425,10 +425,6 @@ struct s_AC {
425 TX_PORT TxPort[SK_MAX_MACS][2]; 425 TX_PORT TxPort[SK_MAX_MACS][2];
426 RX_PORT RxPort[SK_MAX_MACS]; 426 RX_PORT RxPort[SK_MAX_MACS];
427 427
428 unsigned int CsOfs1; /* for checksum calculation */
429 unsigned int CsOfs2; /* for checksum calculation */
430 SK_U32 CsOfs; /* for checksum calculation */
431
432 SK_BOOL CheckQueue; /* check event queue soon */ 428 SK_BOOL CheckQueue; /* check event queue soon */
433 SK_TIMER DrvCleanupTimer;/* to check for pending descriptors */ 429 SK_TIMER DrvCleanupTimer;/* to check for pending descriptors */
434 DIM_INFO DynIrqModInfo; /* all data related to DIM */ 430 DIM_INFO DynIrqModInfo; /* all data related to DIM */
diff --git a/drivers/net/sk98lin/skcsum.c b/drivers/net/sk98lin/skcsum.c
deleted file mode 100644
index 38a6e7a631f3..000000000000
--- a/drivers/net/sk98lin/skcsum.c
+++ /dev/null
@@ -1,871 +0,0 @@
1/******************************************************************************
2 *
3 * Name: skcsum.c
4 * Project: GEnesis, PCI Gigabit Ethernet Adapter
5 * Version: $Revision: 1.12 $
6 * Date: $Date: 2003/08/20 13:55:53 $
7 * Purpose: Store/verify Internet checksum in send/receive packets.
8 *
9 ******************************************************************************/
10
11/******************************************************************************
12 *
13 * (C)Copyright 1998-2003 SysKonnect GmbH.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * The information in this file is provided "AS IS" without warranty.
21 *
22 ******************************************************************************/
23
24#ifdef SK_USE_CSUM /* Check if CSUM is to be used. */
25
26#ifndef lint
27static const char SysKonnectFileId[] =
28 "@(#) $Id: skcsum.c,v 1.12 2003/08/20 13:55:53 mschmid Exp $ (C) SysKonnect.";
29#endif /* !lint */
30
31/******************************************************************************
32 *
33 * Description:
34 *
35 * This is the "GEnesis" common module "CSUM".
36 *
37 * This module contains the code necessary to calculate, store, and verify the
38 * Internet Checksum of IP, TCP, and UDP frames.
39 *
40 * "GEnesis" is an abbreviation of "Gigabit Ethernet Network System in Silicon"
41 * and is the code name of this SysKonnect project.
42 *
43 * Compilation Options:
44 *
45 * SK_USE_CSUM - Define if CSUM is to be used. Otherwise, CSUM will be an
46 * empty module.
47 *
48 * SKCS_OVERWRITE_PROTO - Define to overwrite the default protocol id
49 * definitions. In this case, all SKCS_PROTO_xxx definitions must be made
50 * external.
51 *
52 * SKCS_OVERWRITE_STATUS - Define to overwrite the default return status
53 * definitions. In this case, all SKCS_STATUS_xxx definitions must be made
54 * external.
55 *
56 * Include File Hierarchy:
57 *
58 * "h/skdrv1st.h"
59 * "h/skcsum.h"
60 * "h/sktypes.h"
61 * "h/skqueue.h"
62 * "h/skdrv2nd.h"
63 *
64 ******************************************************************************/
65
66#include "h/skdrv1st.h"
67#include "h/skcsum.h"
68#include "h/skdrv2nd.h"
69
70/* defines ********************************************************************/
71
72/* The size of an Ethernet MAC header. */
73#define SKCS_ETHERNET_MAC_HEADER_SIZE (6+6+2)
74
75/* The size of the used topology's MAC header. */
76#define SKCS_MAC_HEADER_SIZE SKCS_ETHERNET_MAC_HEADER_SIZE
77
78/* The size of the IP header without any option fields. */
79#define SKCS_IP_HEADER_SIZE 20
80
81/*
82 * Field offsets within the IP header.
83 */
84
85/* "Internet Header Version" and "Length". */
86#define SKCS_OFS_IP_HEADER_VERSION_AND_LENGTH 0
87
88/* "Total Length". */
89#define SKCS_OFS_IP_TOTAL_LENGTH 2
90
91/* "Flags" "Fragment Offset". */
92#define SKCS_OFS_IP_FLAGS_AND_FRAGMENT_OFFSET 6
93
94/* "Next Level Protocol" identifier. */
95#define SKCS_OFS_IP_NEXT_LEVEL_PROTOCOL 9
96
97/* Source IP address. */
98#define SKCS_OFS_IP_SOURCE_ADDRESS 12
99
100/* Destination IP address. */
101#define SKCS_OFS_IP_DESTINATION_ADDRESS 16
102
103
104/*
105 * Field offsets within the UDP header.
106 */
107
108/* UDP checksum. */
109#define SKCS_OFS_UDP_CHECKSUM 6
110
111/* IP "Next Level Protocol" identifiers (see RFC 790). */
112#define SKCS_PROTO_ID_TCP 6 /* Transport Control Protocol */
113#define SKCS_PROTO_ID_UDP 17 /* User Datagram Protocol */
114
115/* IP "Don't Fragment" bit. */
116#define SKCS_IP_DONT_FRAGMENT SKCS_HTON16(0x4000)
117
118/* Add a byte offset to a pointer. */
119#define SKCS_IDX(pPtr, Ofs) ((void *) ((char *) (pPtr) + (Ofs)))
120
121/*
122 * Macros that convert host to network representation and vice versa, i.e.
123 * little/big endian conversion on little endian machines only.
124 */
125#ifdef SK_LITTLE_ENDIAN
126#define SKCS_HTON16(Val16) (((unsigned) (Val16) >> 8) | (((Val16) & 0xff) << 8))
127#endif /* SK_LITTLE_ENDIAN */
128#ifdef SK_BIG_ENDIAN
129#define SKCS_HTON16(Val16) (Val16)
130#endif /* SK_BIG_ENDIAN */
131#define SKCS_NTOH16(Val16) SKCS_HTON16(Val16)
132
133/* typedefs *******************************************************************/
134
135/* function prototypes ********************************************************/
136
137/******************************************************************************
138 *
139 * SkCsGetSendInfo - get checksum information for a send packet
140 *
141 * Description:
142 * Get all checksum information necessary to send a TCP or UDP packet. The
143 * function checks the IP header passed to it. If the high-level protocol
144 * is either TCP or UDP the pseudo header checksum is calculated and
145 * returned.
146 *
147 * The function returns the total length of the IP header (including any
148 * IP option fields), which is the same as the start offset of the IP data
149 * which in turn is the start offset of the TCP or UDP header.
150 *
151 * The function also returns the TCP or UDP pseudo header checksum, which
152 * should be used as the start value for the hardware checksum calculation.
153 * (Note that any actual pseudo header checksum can never calculate to
154 * zero.)
155 *
156 * Note:
157 * There is a bug in the GENESIS ASIC which may lead to wrong checksums.
158 *
159 * Arguments:
160 * pAc - A pointer to the adapter context struct.
161 *
162 * pIpHeader - Pointer to IP header. Must be at least the IP header *not*
163 * including any option fields, i.e. at least 20 bytes.
164 *
165 * Note: This pointer will be used to address 8-, 16-, and 32-bit
166 * variables with the respective alignment offsets relative to the pointer.
167 * Thus, the pointer should point to a 32-bit aligned address. If the
168 * target system cannot address 32-bit variables on non 32-bit aligned
169 * addresses, then the pointer *must* point to a 32-bit aligned address.
170 *
171 * pPacketInfo - A pointer to the packet information structure for this
172 * packet. Before calling this SkCsGetSendInfo(), the following field must
173 * be initialized:
174 *
175 * ProtocolFlags - Initialize with any combination of
176 * SKCS_PROTO_XXX bit flags. SkCsGetSendInfo() will only work on
177 * the protocols specified here. Any protocol(s) not specified
178 * here will be ignored.
179 *
180 * Note: Only one checksum can be calculated in hardware. Thus, if
181 * SKCS_PROTO_IP is specified in the 'ProtocolFlags',
182 * SkCsGetSendInfo() must calculate the IP header checksum in
183 * software. It might be a better idea to have the calling
184 * protocol stack calculate the IP header checksum.
185 *
186 * Returns: N/A
187 * On return, the following fields in 'pPacketInfo' may or may not have
188 * been filled with information, depending on the protocol(s) found in the
189 * packet:
190 *
191 * ProtocolFlags - Returns the SKCS_PROTO_XXX bit flags of the protocol(s)
192 * that were both requested by the caller and actually found in the packet.
193 * Protocol(s) not specified by the caller and/or not found in the packet
194 * will have their respective SKCS_PROTO_XXX bit flags reset.
195 *
196 * Note: For IP fragments, TCP and UDP packet information is ignored.
197 *
198 * IpHeaderLength - The total length in bytes of the complete IP header
199 * including any option fields is returned here. This is the start offset
200 * of the IP data, i.e. the TCP or UDP header if present.
201 *
202 * IpHeaderChecksum - If IP has been specified in the 'ProtocolFlags', the
203 * 16-bit Internet Checksum of the IP header is returned here. This value
204 * is to be stored into the packet's 'IP Header Checksum' field.
205 *
206 * PseudoHeaderChecksum - If this is a TCP or UDP packet and if TCP or UDP
207 * has been specified in the 'ProtocolFlags', the 16-bit Internet Checksum
208 * of the TCP or UDP pseudo header is returned here.
209 */
210void SkCsGetSendInfo(
211SK_AC *pAc, /* Adapter context struct. */
212void *pIpHeader, /* IP header. */
213SKCS_PACKET_INFO *pPacketInfo, /* Packet information struct. */
214int NetNumber) /* Net number */
215{
216 /* Internet Header Version found in IP header. */
217 unsigned InternetHeaderVersion;
218
219 /* Length of the IP header as found in IP header. */
220 unsigned IpHeaderLength;
221
222 /* Bit field specifiying the desired/found protocols. */
223 unsigned ProtocolFlags;
224
225 /* Next level protocol identifier found in IP header. */
226 unsigned NextLevelProtocol;
227
228 /* Length of IP data portion. */
229 unsigned IpDataLength;
230
231 /* TCP/UDP pseudo header checksum. */
232 unsigned long PseudoHeaderChecksum;
233
234 /* Pointer to next level protocol statistics structure. */
235 SKCS_PROTO_STATS *NextLevelProtoStats;
236
237 /* Temporary variable. */
238 unsigned Tmp;
239
240 Tmp = *(SK_U8 *)
241 SKCS_IDX(pIpHeader, SKCS_OFS_IP_HEADER_VERSION_AND_LENGTH);
242
243 /* Get the Internet Header Version (IHV). */
244 /* Note: The IHV is stored in the upper four bits. */
245
246 InternetHeaderVersion = Tmp >> 4;
247
248 /* Check the Internet Header Version. */
249 /* Note: We currently only support IP version 4. */
250
251 if (InternetHeaderVersion != 4) { /* IPv4? */
252 SK_DBG_MSG(pAc, SK_DBGMOD_CSUM, SK_DBGCAT_ERR | SK_DBGCAT_TX,
253 ("Tx: Unknown Internet Header Version %u.\n",
254 InternetHeaderVersion));
255 pPacketInfo->ProtocolFlags = 0;
256 pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].TxUnableCts++;
257 return;
258 }
259
260 /* Get the IP header length (IHL). */
261 /*
262 * Note: The IHL is stored in the lower four bits as the number of
263 * 4-byte words.
264 */
265
266 IpHeaderLength = (Tmp & 0xf) * 4;
267 pPacketInfo->IpHeaderLength = IpHeaderLength;
268
269 /* Check the IP header length. */
270
271 /* 04-Aug-1998 sw - Really check the IHL? Necessary? */
272
273 if (IpHeaderLength < 5*4) {
274 SK_DBG_MSG(pAc, SK_DBGMOD_CSUM, SK_DBGCAT_ERR | SK_DBGCAT_TX,
275 ("Tx: Invalid IP Header Length %u.\n", IpHeaderLength));
276 pPacketInfo->ProtocolFlags = 0;
277 pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].TxUnableCts++;
278 return;
279 }
280
281 /* This is an IPv4 frame with a header of valid length. */
282
283 pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].TxOkCts++;
284
285 /* Check if we should calculate the IP header checksum. */
286
287 ProtocolFlags = pPacketInfo->ProtocolFlags;
288
289 if (ProtocolFlags & SKCS_PROTO_IP) {
290 pPacketInfo->IpHeaderChecksum =
291 SkCsCalculateChecksum(pIpHeader, IpHeaderLength);
292 }
293
294 /* Get the next level protocol identifier. */
295
296 NextLevelProtocol =
297 *(SK_U8 *) SKCS_IDX(pIpHeader, SKCS_OFS_IP_NEXT_LEVEL_PROTOCOL);
298
299 /*
300 * Check if this is a TCP or UDP frame and if we should calculate the
301 * TCP/UDP pseudo header checksum.
302 *
303 * Also clear all protocol bit flags of protocols not present in the
304 * frame.
305 */
306
307 if ((ProtocolFlags & SKCS_PROTO_TCP) != 0 &&
308 NextLevelProtocol == SKCS_PROTO_ID_TCP) {
309 /* TCP/IP frame. */
310 ProtocolFlags &= SKCS_PROTO_TCP | SKCS_PROTO_IP;
311 NextLevelProtoStats =
312 &pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_TCP];
313 }
314 else if ((ProtocolFlags & SKCS_PROTO_UDP) != 0 &&
315 NextLevelProtocol == SKCS_PROTO_ID_UDP) {
316 /* UDP/IP frame. */
317 ProtocolFlags &= SKCS_PROTO_UDP | SKCS_PROTO_IP;
318 NextLevelProtoStats =
319 &pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_UDP];
320 }
321 else {
322 /*
323 * Either not a TCP or UDP frame and/or TCP/UDP processing not
324 * specified.
325 */
326 pPacketInfo->ProtocolFlags = ProtocolFlags & SKCS_PROTO_IP;
327 return;
328 }
329
330 /* Check if this is an IP fragment. */
331
332 /*
333 * Note: An IP fragment has a non-zero "Fragment Offset" field and/or
334 * the "More Fragments" bit set. Thus, if both the "Fragment Offset"
335 * and the "More Fragments" are zero, it is *not* a fragment. We can
336 * easily check both at the same time since they are in the same 16-bit
337 * word.
338 */
339
340 if ((*(SK_U16 *)
341 SKCS_IDX(pIpHeader, SKCS_OFS_IP_FLAGS_AND_FRAGMENT_OFFSET) &
342 ~SKCS_IP_DONT_FRAGMENT) != 0) {
343 /* IP fragment; ignore all other protocols. */
344 pPacketInfo->ProtocolFlags = ProtocolFlags & SKCS_PROTO_IP;
345 NextLevelProtoStats->TxUnableCts++;
346 return;
347 }
348
349 /*
350 * Calculate the TCP/UDP pseudo header checksum.
351 */
352
353 /* Get total length of IP header and data. */
354
355 IpDataLength =
356 *(SK_U16 *) SKCS_IDX(pIpHeader, SKCS_OFS_IP_TOTAL_LENGTH);
357
358 /* Get length of IP data portion. */
359
360 IpDataLength = SKCS_NTOH16(IpDataLength) - IpHeaderLength;
361
362 /* Calculate the sum of all pseudo header fields (16-bit). */
363
364 PseudoHeaderChecksum =
365 (unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
366 SKCS_OFS_IP_SOURCE_ADDRESS + 0) +
367 (unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
368 SKCS_OFS_IP_SOURCE_ADDRESS + 2) +
369 (unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
370 SKCS_OFS_IP_DESTINATION_ADDRESS + 0) +
371 (unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
372 SKCS_OFS_IP_DESTINATION_ADDRESS + 2) +
373 (unsigned long) SKCS_HTON16(NextLevelProtocol) +
374 (unsigned long) SKCS_HTON16(IpDataLength);
375
376 /* Add-in any carries. */
377
378 SKCS_OC_ADD(PseudoHeaderChecksum, PseudoHeaderChecksum, 0);
379
380 /* Add-in any new carry. */
381
382 SKCS_OC_ADD(pPacketInfo->PseudoHeaderChecksum, PseudoHeaderChecksum, 0);
383
384 pPacketInfo->ProtocolFlags = ProtocolFlags;
385 NextLevelProtoStats->TxOkCts++; /* Success. */
386} /* SkCsGetSendInfo */
387
388
389/******************************************************************************
390 *
391 * SkCsGetReceiveInfo - verify checksum information for a received packet
392 *
393 * Description:
394 * Verify a received frame's checksum. The function returns a status code
395 * reflecting the result of the verification.
396 *
397 * Note:
398 * Before calling this function you have to verify that the frame is
399 * not padded and Checksum1 and Checksum2 are bigger than 1.
400 *
401 * Arguments:
402 * pAc - Pointer to adapter context struct.
403 *
404 * pIpHeader - Pointer to IP header. Must be at least the length in bytes
405 * of the received IP header including any option fields. For UDP packets,
406 * 8 additional bytes are needed to access the UDP checksum.
407 *
408 * Note: The actual length of the IP header is stored in the lower four
409 * bits of the first octet of the IP header as the number of 4-byte words,
410 * so it must be multiplied by four to get the length in bytes. Thus, the
411 * maximum IP header length is 15 * 4 = 60 bytes.
412 *
413 * Checksum1 - The first 16-bit Internet Checksum calculated by the
414 * hardware starting at the offset returned by SkCsSetReceiveFlags().
415 *
416 * Checksum2 - The second 16-bit Internet Checksum calculated by the
417 * hardware starting at the offset returned by SkCsSetReceiveFlags().
418 *
419 * Returns:
420 * SKCS_STATUS_UNKNOWN_IP_VERSION - Not an IP v4 frame.
421 * SKCS_STATUS_IP_CSUM_ERROR - IP checksum error.
422 * SKCS_STATUS_IP_CSUM_ERROR_TCP - IP checksum error in TCP frame.
423 * SKCS_STATUS_IP_CSUM_ERROR_UDP - IP checksum error in UDP frame
424 * SKCS_STATUS_IP_FRAGMENT - IP fragment (IP checksum ok).
425 * SKCS_STATUS_IP_CSUM_OK - IP checksum ok (not a TCP or UDP frame).
426 * SKCS_STATUS_TCP_CSUM_ERROR - TCP checksum error (IP checksum ok).
427 * SKCS_STATUS_UDP_CSUM_ERROR - UDP checksum error (IP checksum ok).
428 * SKCS_STATUS_TCP_CSUM_OK - IP and TCP checksum ok.
429 * SKCS_STATUS_UDP_CSUM_OK - IP and UDP checksum ok.
430 * SKCS_STATUS_IP_CSUM_OK_NO_UDP - IP checksum OK and no UDP checksum.
431 *
432 * Note: If SKCS_OVERWRITE_STATUS is defined, the SKCS_STATUS_XXX values
433 * returned here can be defined in some header file by the module using CSUM.
434 * In this way, the calling module can assign return values for its own needs,
435 * e.g. by assigning bit flags to the individual protocols.
436 */
437SKCS_STATUS SkCsGetReceiveInfo(
438SK_AC *pAc, /* Adapter context struct. */
439void *pIpHeader, /* IP header. */
440unsigned Checksum1, /* Hardware checksum 1. */
441unsigned Checksum2, /* Hardware checksum 2. */
442int NetNumber) /* Net number */
443{
444 /* Internet Header Version found in IP header. */
445 unsigned InternetHeaderVersion;
446
447 /* Length of the IP header as found in IP header. */
448 unsigned IpHeaderLength;
449
450 /* Length of IP data portion. */
451 unsigned IpDataLength;
452
453 /* IP header checksum. */
454 unsigned IpHeaderChecksum;
455
456 /* IP header options checksum, if any. */
457 unsigned IpOptionsChecksum;
458
459 /* IP data checksum, i.e. TCP/UDP checksum. */
460 unsigned IpDataChecksum;
461
462 /* Next level protocol identifier found in IP header. */
463 unsigned NextLevelProtocol;
464
465 /* The checksum of the "next level protocol", i.e. TCP or UDP. */
466 unsigned long NextLevelProtocolChecksum;
467
468 /* Pointer to next level protocol statistics structure. */
469 SKCS_PROTO_STATS *NextLevelProtoStats;
470
471 /* Temporary variable. */
472 unsigned Tmp;
473
474 Tmp = *(SK_U8 *)
475 SKCS_IDX(pIpHeader, SKCS_OFS_IP_HEADER_VERSION_AND_LENGTH);
476
477 /* Get the Internet Header Version (IHV). */
478 /* Note: The IHV is stored in the upper four bits. */
479
480 InternetHeaderVersion = Tmp >> 4;
481
482 /* Check the Internet Header Version. */
483 /* Note: We currently only support IP version 4. */
484
485 if (InternetHeaderVersion != 4) { /* IPv4? */
486 SK_DBG_MSG(pAc, SK_DBGMOD_CSUM, SK_DBGCAT_ERR | SK_DBGCAT_RX,
487 ("Rx: Unknown Internet Header Version %u.\n",
488 InternetHeaderVersion));
489 pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].RxUnableCts++;
490 return (SKCS_STATUS_UNKNOWN_IP_VERSION);
491 }
492
493 /* Get the IP header length (IHL). */
494 /*
495 * Note: The IHL is stored in the lower four bits as the number of
496 * 4-byte words.
497 */
498
499 IpHeaderLength = (Tmp & 0xf) * 4;
500
501 /* Check the IP header length. */
502
503 /* 04-Aug-1998 sw - Really check the IHL? Necessary? */
504
505 if (IpHeaderLength < 5*4) {
506 SK_DBG_MSG(pAc, SK_DBGMOD_CSUM, SK_DBGCAT_ERR | SK_DBGCAT_RX,
507 ("Rx: Invalid IP Header Length %u.\n", IpHeaderLength));
508 pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].RxErrCts++;
509 return (SKCS_STATUS_IP_CSUM_ERROR);
510 }
511
512 /* This is an IPv4 frame with a header of valid length. */
513
514 /* Get the IP header and data checksum. */
515
516 IpDataChecksum = Checksum2;
517
518 /*
519 * The IP header checksum is calculated as follows:
520 *
521 * IpHeaderChecksum = Checksum1 - Checksum2
522 */
523
524 SKCS_OC_SUB(IpHeaderChecksum, Checksum1, Checksum2);
525
526 /* Check if any IP header options. */
527
528 if (IpHeaderLength > SKCS_IP_HEADER_SIZE) {
529
530 /* Get the IP options checksum. */
531
532 IpOptionsChecksum = SkCsCalculateChecksum(
533 SKCS_IDX(pIpHeader, SKCS_IP_HEADER_SIZE),
534 IpHeaderLength - SKCS_IP_HEADER_SIZE);
535
536 /* Adjust the IP header and IP data checksums. */
537
538 SKCS_OC_ADD(IpHeaderChecksum, IpHeaderChecksum, IpOptionsChecksum);
539
540 SKCS_OC_SUB(IpDataChecksum, IpDataChecksum, IpOptionsChecksum);
541 }
542
543 /*
544 * Check if the IP header checksum is ok.
545 *
546 * NOTE: We must check the IP header checksum even if the caller just wants
547 * us to check upper-layer checksums, because we cannot do any further
548 * processing of the packet without a valid IP checksum.
549 */
550
551 /* Get the next level protocol identifier. */
552
553 NextLevelProtocol = *(SK_U8 *)
554 SKCS_IDX(pIpHeader, SKCS_OFS_IP_NEXT_LEVEL_PROTOCOL);
555
556 if (IpHeaderChecksum != 0xffff) {
557 pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_IP].RxErrCts++;
558 /* the NDIS tester wants to know the upper level protocol too */
559 if (NextLevelProtocol == SKCS_PROTO_ID_TCP) {
560 return(SKCS_STATUS_IP_CSUM_ERROR_TCP);
561 }
562 else if (NextLevelProtocol == SKCS_PROTO_ID_UDP) {
563 return(SKCS_STATUS_IP_CSUM_ERROR_UDP);
564 }
565 return (SKCS_STATUS_IP_CSUM_ERROR);
566 }
567
568 /*
569 * Check if this is a TCP or UDP frame and if we should calculate the
570 * TCP/UDP pseudo header checksum.
571 *
572 * Also clear all protocol bit flags of protocols not present in the
573 * frame.
574 */
575
576 if ((pAc->Csum.ReceiveFlags[NetNumber] & SKCS_PROTO_TCP) != 0 &&
577 NextLevelProtocol == SKCS_PROTO_ID_TCP) {
578 /* TCP/IP frame. */
579 NextLevelProtoStats =
580 &pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_TCP];
581 }
582 else if ((pAc->Csum.ReceiveFlags[NetNumber] & SKCS_PROTO_UDP) != 0 &&
583 NextLevelProtocol == SKCS_PROTO_ID_UDP) {
584 /* UDP/IP frame. */
585 NextLevelProtoStats =
586 &pAc->Csum.ProtoStats[NetNumber][SKCS_PROTO_STATS_UDP];
587 }
588 else {
589 /*
590 * Either not a TCP or UDP frame and/or TCP/UDP processing not
591 * specified.
592 */
593 return (SKCS_STATUS_IP_CSUM_OK);
594 }
595
596 /* Check if this is an IP fragment. */
597
598 /*
599 * Note: An IP fragment has a non-zero "Fragment Offset" field and/or
600 * the "More Fragments" bit set. Thus, if both the "Fragment Offset"
601 * and the "More Fragments" are zero, it is *not* a fragment. We can
602 * easily check both at the same time since they are in the same 16-bit
603 * word.
604 */
605
606 if ((*(SK_U16 *)
607 SKCS_IDX(pIpHeader, SKCS_OFS_IP_FLAGS_AND_FRAGMENT_OFFSET) &
608 ~SKCS_IP_DONT_FRAGMENT) != 0) {
609 /* IP fragment; ignore all other protocols. */
610 NextLevelProtoStats->RxUnableCts++;
611 return (SKCS_STATUS_IP_FRAGMENT);
612 }
613
614 /*
615 * 08-May-2000 ra
616 *
617 * From RFC 768 (UDP)
618 * If the computed checksum is zero, it is transmitted as all ones (the
619 * equivalent in one's complement arithmetic). An all zero transmitted
620 * checksum value means that the transmitter generated no checksum (for
621 * debugging or for higher level protocols that don't care).
622 */
623
624 if (NextLevelProtocol == SKCS_PROTO_ID_UDP &&
625 *(SK_U16*)SKCS_IDX(pIpHeader, IpHeaderLength + 6) == 0x0000) {
626
627 NextLevelProtoStats->RxOkCts++;
628
629 return (SKCS_STATUS_IP_CSUM_OK_NO_UDP);
630 }
631
632 /*
633 * Calculate the TCP/UDP checksum.
634 */
635
636 /* Get total length of IP header and data. */
637
638 IpDataLength =
639 *(SK_U16 *) SKCS_IDX(pIpHeader, SKCS_OFS_IP_TOTAL_LENGTH);
640
641 /* Get length of IP data portion. */
642
643 IpDataLength = SKCS_NTOH16(IpDataLength) - IpHeaderLength;
644
645 NextLevelProtocolChecksum =
646
647 /* Calculate the pseudo header checksum. */
648
649 (unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
650 SKCS_OFS_IP_SOURCE_ADDRESS + 0) +
651 (unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
652 SKCS_OFS_IP_SOURCE_ADDRESS + 2) +
653 (unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
654 SKCS_OFS_IP_DESTINATION_ADDRESS + 0) +
655 (unsigned long) *(SK_U16 *) SKCS_IDX(pIpHeader,
656 SKCS_OFS_IP_DESTINATION_ADDRESS + 2) +
657 (unsigned long) SKCS_HTON16(NextLevelProtocol) +
658 (unsigned long) SKCS_HTON16(IpDataLength) +
659
660 /* Add the TCP/UDP header checksum. */
661
662 (unsigned long) IpDataChecksum;
663
664 /* Add-in any carries. */
665
666 SKCS_OC_ADD(NextLevelProtocolChecksum, NextLevelProtocolChecksum, 0);
667
668 /* Add-in any new carry. */
669
670 SKCS_OC_ADD(NextLevelProtocolChecksum, NextLevelProtocolChecksum, 0);
671
672 /* Check if the TCP/UDP checksum is ok. */
673
674 if ((unsigned) NextLevelProtocolChecksum == 0xffff) {
675
676 /* TCP/UDP checksum ok. */
677
678 NextLevelProtoStats->RxOkCts++;
679
680 return (NextLevelProtocol == SKCS_PROTO_ID_TCP ?
681 SKCS_STATUS_TCP_CSUM_OK : SKCS_STATUS_UDP_CSUM_OK);
682 }
683
684 /* TCP/UDP checksum error. */
685
686 NextLevelProtoStats->RxErrCts++;
687
688 return (NextLevelProtocol == SKCS_PROTO_ID_TCP ?
689 SKCS_STATUS_TCP_CSUM_ERROR : SKCS_STATUS_UDP_CSUM_ERROR);
690} /* SkCsGetReceiveInfo */
691
692
693/******************************************************************************
694 *
695 * SkCsSetReceiveFlags - set checksum receive flags
696 *
697 * Description:
698 * Use this function to set the various receive flags. According to the
699 * protocol flags set by the caller, the start offsets within received
700 * packets of the two hardware checksums are returned. These offsets must
701 * be stored in all receive descriptors.
702 *
703 * Arguments:
704 * pAc - Pointer to adapter context struct.
705 *
706 * ReceiveFlags - Any combination of SK_PROTO_XXX flags of the protocols
707 * for which the caller wants checksum information on received frames.
708 *
709 * pChecksum1Offset - The start offset of the first receive descriptor
710 * hardware checksum to be calculated for received frames is returned
711 * here.
712 *
713 * pChecksum2Offset - The start offset of the second receive descriptor
714 * hardware checksum to be calculated for received frames is returned
715 * here.
716 *
717 * Returns: N/A
718 * Returns the two hardware checksum start offsets.
719 */
720void SkCsSetReceiveFlags(
721SK_AC *pAc, /* Adapter context struct. */
722unsigned ReceiveFlags, /* New receive flags. */
723unsigned *pChecksum1Offset, /* Offset for hardware checksum 1. */
724unsigned *pChecksum2Offset, /* Offset for hardware checksum 2. */
725int NetNumber)
726{
727 /* Save the receive flags. */
728
729 pAc->Csum.ReceiveFlags[NetNumber] = ReceiveFlags;
730
731 /* First checksum start offset is the IP header. */
732 *pChecksum1Offset = SKCS_MAC_HEADER_SIZE;
733
734 /*
735 * Second checksum start offset is the IP data. Note that this may vary
736 * if there are any IP header options in the actual packet.
737 */
738 *pChecksum2Offset = SKCS_MAC_HEADER_SIZE + SKCS_IP_HEADER_SIZE;
739} /* SkCsSetReceiveFlags */
740
741#ifndef SK_CS_CALCULATE_CHECKSUM
742
743/******************************************************************************
744 *
745 * SkCsCalculateChecksum - calculate checksum for specified data
746 *
747 * Description:
748 * Calculate and return the 16-bit Internet Checksum for the specified
749 * data.
750 *
751 * Arguments:
752 * pData - Pointer to data for which the checksum shall be calculated.
753 * Note: The pointer should be aligned on a 16-bit boundary.
754 *
755 * Length - Length in bytes of data to checksum.
756 *
757 * Returns:
758 * The 16-bit Internet Checksum for the specified data.
759 *
760 * Note: The checksum is calculated in the machine's natural byte order,
761 * i.e. little vs. big endian. Thus, the resulting checksum is different
762 * for the same input data on little and big endian machines.
763 *
764 * However, when written back to the network packet, the byte order is
765 * always in correct network order.
766 */
767unsigned SkCsCalculateChecksum(
768void *pData, /* Data to checksum. */
769unsigned Length) /* Length of data. */
770{
771 SK_U16 *pU16; /* Pointer to the data as 16-bit words. */
772 unsigned long Checksum; /* Checksum; must be at least 32 bits. */
773
774 /* Sum up all 16-bit words. */
775
776 pU16 = (SK_U16 *) pData;
777 for (Checksum = 0; Length > 1; Length -= 2) {
778 Checksum += *pU16++;
779 }
780
781 /* If this is an odd number of bytes, add-in the last byte. */
782
783 if (Length > 0) {
784#ifdef SK_BIG_ENDIAN
785 /* Add the last byte as the high byte. */
786 Checksum += ((unsigned) *(SK_U8 *) pU16) << 8;
787#else /* !SK_BIG_ENDIAN */
788 /* Add the last byte as the low byte. */
789 Checksum += *(SK_U8 *) pU16;
790#endif /* !SK_BIG_ENDIAN */
791 }
792
793 /* Add-in any carries. */
794
795 SKCS_OC_ADD(Checksum, Checksum, 0);
796
797 /* Add-in any new carry. */
798
799 SKCS_OC_ADD(Checksum, Checksum, 0);
800
801 /* Note: All bits beyond the 16-bit limit are now zero. */
802
803 return ((unsigned) Checksum);
804} /* SkCsCalculateChecksum */
805
806#endif /* SK_CS_CALCULATE_CHECKSUM */
807
808/******************************************************************************
809 *
810 * SkCsEvent - the CSUM event dispatcher
811 *
812 * Description:
813 * This is the event handler for the CSUM module.
814 *
815 * Arguments:
816 * pAc - Pointer to adapter context.
817 *
818 * Ioc - I/O context.
819 *
820 * Event - Event id.
821 *
822 * Param - Event dependent parameter.
823 *
824 * Returns:
825 * The 16-bit Internet Checksum for the specified data.
826 *
827 * Note: The checksum is calculated in the machine's natural byte order,
828 * i.e. little vs. big endian. Thus, the resulting checksum is different
829 * for the same input data on little and big endian machines.
830 *
831 * However, when written back to the network packet, the byte order is
832 * always in correct network order.
833 */
834int SkCsEvent(
835SK_AC *pAc, /* Pointer to adapter context. */
836SK_IOC Ioc, /* I/O context. */
837SK_U32 Event, /* Event id. */
838SK_EVPARA Param) /* Event dependent parameter. */
839{
840 int ProtoIndex;
841 int NetNumber;
842
843 switch (Event) {
844 /*
845 * Clear protocol statistics.
846 *
847 * Param - Protocol index, or -1 for all protocols.
848 * - Net number.
849 */
850 case SK_CSUM_EVENT_CLEAR_PROTO_STATS:
851
852 ProtoIndex = (int)Param.Para32[1];
853 NetNumber = (int)Param.Para32[0];
854 if (ProtoIndex < 0) { /* Clear for all protocols. */
855 if (NetNumber >= 0) {
856 SK_MEMSET(&pAc->Csum.ProtoStats[NetNumber][0], 0,
857 sizeof(pAc->Csum.ProtoStats[NetNumber]));
858 }
859 }
860 else { /* Clear for individual protocol. */
861 SK_MEMSET(&pAc->Csum.ProtoStats[NetNumber][ProtoIndex], 0,
862 sizeof(pAc->Csum.ProtoStats[NetNumber][ProtoIndex]));
863 }
864 break;
865 default:
866 break;
867 }
868 return (0); /* Success. */
869} /* SkCsEvent */
870
871#endif /* SK_USE_CSUM */
diff --git a/drivers/net/sk98lin/skge.c b/drivers/net/sk98lin/skge.c
index b18c92cb629e..857ade447889 100644
--- a/drivers/net/sk98lin/skge.c
+++ b/drivers/net/sk98lin/skge.c
@@ -101,7 +101,6 @@
101 * "h/skgeinit.h" 101 * "h/skgeinit.h"
102 * "h/skaddr.h" 102 * "h/skaddr.h"
103 * "h/skgesirq.h" 103 * "h/skgesirq.h"
104 * "h/skcsum.h"
105 * "h/skrlmt.h" 104 * "h/skrlmt.h"
106 * 105 *
107 ******************************************************************************/ 106 ******************************************************************************/
@@ -113,6 +112,7 @@
113#include <linux/init.h> 112#include <linux/init.h>
114#include <linux/proc_fs.h> 113#include <linux/proc_fs.h>
115#include <linux/dma-mapping.h> 114#include <linux/dma-mapping.h>
115#include <linux/ip.h>
116 116
117#include "h/skdrv1st.h" 117#include "h/skdrv1st.h"
118#include "h/skdrv2nd.h" 118#include "h/skdrv2nd.h"
@@ -601,11 +601,6 @@ SK_BOOL DualNet;
601 return(-EAGAIN); 601 return(-EAGAIN);
602 } 602 }
603 603
604 SkCsSetReceiveFlags(pAC,
605 SKCS_PROTO_IP | SKCS_PROTO_TCP | SKCS_PROTO_UDP,
606 &pAC->CsOfs1, &pAC->CsOfs2, 0);
607 pAC->CsOfs = (pAC->CsOfs2 << 16) | pAC->CsOfs1;
608
609 BoardInitMem(pAC); 604 BoardInitMem(pAC);
610 /* tschilling: New common function with minimum size check. */ 605 /* tschilling: New common function with minimum size check. */
611 DualNet = SK_FALSE; 606 DualNet = SK_FALSE;
@@ -823,7 +818,7 @@ uintptr_t VNextDescr; /* the virtual bus address of the next descriptor */
823 /* set the pointers right */ 818 /* set the pointers right */
824 pDescr->VNextRxd = VNextDescr & 0xffffffffULL; 819 pDescr->VNextRxd = VNextDescr & 0xffffffffULL;
825 pDescr->pNextRxd = pNextDescr; 820 pDescr->pNextRxd = pNextDescr;
826 pDescr->TcpSumStarts = pAC->CsOfs; 821 pDescr->TcpSumStarts = 0;
827 822
828 /* advance one step */ 823 /* advance one step */
829 pPrevDescr = pDescr; 824 pPrevDescr = pDescr;
@@ -1505,8 +1500,6 @@ struct sk_buff *pMessage) /* pointer to send-message */
1505 TXD *pOldTxd; 1500 TXD *pOldTxd;
1506 unsigned long Flags; 1501 unsigned long Flags;
1507 SK_U64 PhysAddr; 1502 SK_U64 PhysAddr;
1508 int Protocol;
1509 int IpHeaderLength;
1510 int BytesSend = pMessage->len; 1503 int BytesSend = pMessage->len;
1511 1504
1512 SK_DBG_MSG(NULL, SK_DBGMOD_DRV, SK_DBGCAT_DRV_TX_PROGRESS, ("X")); 1505 SK_DBG_MSG(NULL, SK_DBGMOD_DRV, SK_DBGCAT_DRV_TX_PROGRESS, ("X"));
@@ -1579,8 +1572,10 @@ struct sk_buff *pMessage) /* pointer to send-message */
1579 pTxd->pMBuf = pMessage; 1572 pTxd->pMBuf = pMessage;
1580 1573
1581 if (pMessage->ip_summed == CHECKSUM_HW) { 1574 if (pMessage->ip_summed == CHECKSUM_HW) {
1582 Protocol = ((SK_U8)pMessage->data[C_OFFSET_IPPROTO] & 0xff); 1575 u16 hdrlen = pMessage->h.raw - pMessage->data;
1583 if ((Protocol == C_PROTO_ID_UDP) && 1576 u16 offset = hdrlen + pMessage->csum;
1577
1578 if ((pMessage->h.ipiph->protocol == IPPROTO_UDP ) &&
1584 (pAC->GIni.GIChipRev == 0) && 1579 (pAC->GIni.GIChipRev == 0) &&
1585 (pAC->GIni.GIChipId == CHIP_ID_YUKON)) { 1580 (pAC->GIni.GIChipId == CHIP_ID_YUKON)) {
1586 pTxd->TBControl = BMU_TCP_CHECK; 1581 pTxd->TBControl = BMU_TCP_CHECK;
@@ -1588,14 +1583,9 @@ struct sk_buff *pMessage) /* pointer to send-message */
1588 pTxd->TBControl = BMU_UDP_CHECK; 1583 pTxd->TBControl = BMU_UDP_CHECK;
1589 } 1584 }
1590 1585
1591 IpHeaderLength = (SK_U8)pMessage->data[C_OFFSET_IPHEADER]; 1586 pTxd->TcpSumOfs = 0;
1592 IpHeaderLength = (IpHeaderLength & 0xf) * 4; 1587 pTxd->TcpSumSt = hdrlen;
1593 pTxd->TcpSumOfs = 0; /* PH-Checksum already calculated */ 1588 pTxd->TcpSumWr = offset;
1594 pTxd->TcpSumSt = C_LEN_ETHERMAC_HEADER + IpHeaderLength +
1595 (Protocol == C_PROTO_ID_UDP ?
1596 C_OFFSET_UDPHEADER_UDPCS :
1597 C_OFFSET_TCPHEADER_TCPCS);
1598 pTxd->TcpSumWr = C_LEN_ETHERMAC_HEADER + IpHeaderLength;
1599 1589
1600 pTxd->TBControl |= BMU_OWN | BMU_STF | 1590 pTxd->TBControl |= BMU_OWN | BMU_STF |
1601 BMU_SW | BMU_EOF | 1591 BMU_SW | BMU_EOF |
@@ -1658,11 +1648,10 @@ struct sk_buff *pMessage) /* pointer to send-message */
1658 TXD *pTxdLst; 1648 TXD *pTxdLst;
1659 int CurrFrag; 1649 int CurrFrag;
1660 int BytesSend; 1650 int BytesSend;
1661 int IpHeaderLength;
1662 int Protocol;
1663 skb_frag_t *sk_frag; 1651 skb_frag_t *sk_frag;
1664 SK_U64 PhysAddr; 1652 SK_U64 PhysAddr;
1665 unsigned long Flags; 1653 unsigned long Flags;
1654 SK_U32 Control;
1666 1655
1667 spin_lock_irqsave(&pTxPort->TxDesRingLock, Flags); 1656 spin_lock_irqsave(&pTxPort->TxDesRingLock, Flags);
1668#ifndef USE_TX_COMPLETE 1657#ifndef USE_TX_COMPLETE
@@ -1685,7 +1674,6 @@ struct sk_buff *pMessage) /* pointer to send-message */
1685 pTxdFst = pTxd; 1674 pTxdFst = pTxd;
1686 pTxdLst = pTxd; 1675 pTxdLst = pTxd;
1687 BytesSend = 0; 1676 BytesSend = 0;
1688 Protocol = 0;
1689 1677
1690 /* 1678 /*
1691 ** Map the first fragment (header) into the DMA-space 1679 ** Map the first fragment (header) into the DMA-space
@@ -1703,32 +1691,31 @@ struct sk_buff *pMessage) /* pointer to send-message */
1703 ** Does the HW need to evaluate checksum for TCP or UDP packets? 1691 ** Does the HW need to evaluate checksum for TCP or UDP packets?
1704 */ 1692 */
1705 if (pMessage->ip_summed == CHECKSUM_HW) { 1693 if (pMessage->ip_summed == CHECKSUM_HW) {
1706 pTxd->TBControl = BMU_STF | BMU_STFWD | skb_headlen(pMessage); 1694 u16 hdrlen = pMessage->h.raw - pMessage->data;
1695 u16 offset = hdrlen + pMessage->csum;
1696
1697 Control = BMU_STFWD;
1698
1707 /* 1699 /*
1708 ** We have to use the opcode for tcp here, because the 1700 ** We have to use the opcode for tcp here, because the
1709 ** opcode for udp is not working in the hardware yet 1701 ** opcode for udp is not working in the hardware yet
1710 ** (Revision 2.0) 1702 ** (Revision 2.0)
1711 */ 1703 */
1712 Protocol = ((SK_U8)pMessage->data[C_OFFSET_IPPROTO] & 0xff); 1704 if ((pMessage->h.ipiph->protocol == IPPROTO_UDP ) &&
1713 if ((Protocol == C_PROTO_ID_UDP) &&
1714 (pAC->GIni.GIChipRev == 0) && 1705 (pAC->GIni.GIChipRev == 0) &&
1715 (pAC->GIni.GIChipId == CHIP_ID_YUKON)) { 1706 (pAC->GIni.GIChipId == CHIP_ID_YUKON)) {
1716 pTxd->TBControl |= BMU_TCP_CHECK; 1707 Control |= BMU_TCP_CHECK;
1717 } else { 1708 } else {
1718 pTxd->TBControl |= BMU_UDP_CHECK; 1709 Control |= BMU_UDP_CHECK;
1719 } 1710 }
1720 1711
1721 IpHeaderLength = ((SK_U8)pMessage->data[C_OFFSET_IPHEADER] & 0xf)*4; 1712 pTxd->TcpSumOfs = 0;
1722 pTxd->TcpSumOfs = 0; /* PH-Checksum already claculated */ 1713 pTxd->TcpSumSt = hdrlen;
1723 pTxd->TcpSumSt = C_LEN_ETHERMAC_HEADER + IpHeaderLength + 1714 pTxd->TcpSumWr = offset;
1724 (Protocol == C_PROTO_ID_UDP ? 1715 } else
1725 C_OFFSET_UDPHEADER_UDPCS : 1716 Control = BMU_CHECK | BMU_SW;
1726 C_OFFSET_TCPHEADER_TCPCS); 1717
1727 pTxd->TcpSumWr = C_LEN_ETHERMAC_HEADER + IpHeaderLength; 1718 pTxd->TBControl = BMU_STF | Control | skb_headlen(pMessage);
1728 } else {
1729 pTxd->TBControl = BMU_CHECK | BMU_SW | BMU_STF |
1730 skb_headlen(pMessage);
1731 }
1732 1719
1733 pTxd = pTxd->pNextTxd; 1720 pTxd = pTxd->pNextTxd;
1734 pTxPort->TxdRingFree--; 1721 pTxPort->TxdRingFree--;
@@ -1752,40 +1739,18 @@ struct sk_buff *pMessage) /* pointer to send-message */
1752 pTxd->VDataHigh = (SK_U32) (PhysAddr >> 32); 1739 pTxd->VDataHigh = (SK_U32) (PhysAddr >> 32);
1753 pTxd->pMBuf = pMessage; 1740 pTxd->pMBuf = pMessage;
1754 1741
1755 /* 1742 pTxd->TBControl = Control | BMU_OWN | sk_frag->size;;
1756 ** Does the HW need to evaluate checksum for TCP or UDP packets?
1757 */
1758 if (pMessage->ip_summed == CHECKSUM_HW) {
1759 pTxd->TBControl = BMU_OWN | BMU_SW | BMU_STFWD;
1760 /*
1761 ** We have to use the opcode for tcp here because the
1762 ** opcode for udp is not working in the hardware yet
1763 ** (revision 2.0)
1764 */
1765 if ((Protocol == C_PROTO_ID_UDP) &&
1766 (pAC->GIni.GIChipRev == 0) &&
1767 (pAC->GIni.GIChipId == CHIP_ID_YUKON)) {
1768 pTxd->TBControl |= BMU_TCP_CHECK;
1769 } else {
1770 pTxd->TBControl |= BMU_UDP_CHECK;
1771 }
1772 } else {
1773 pTxd->TBControl = BMU_CHECK | BMU_SW | BMU_OWN;
1774 }
1775 1743
1776 /* 1744 /*
1777 ** Do we have the last fragment? 1745 ** Do we have the last fragment?
1778 */ 1746 */
1779 if( (CurrFrag+1) == skb_shinfo(pMessage)->nr_frags ) { 1747 if( (CurrFrag+1) == skb_shinfo(pMessage)->nr_frags ) {
1780#ifdef USE_TX_COMPLETE 1748#ifdef USE_TX_COMPLETE
1781 pTxd->TBControl |= BMU_EOF | BMU_IRQ_EOF | sk_frag->size; 1749 pTxd->TBControl |= BMU_EOF | BMU_IRQ_EOF;
1782#else 1750#else
1783 pTxd->TBControl |= BMU_EOF | sk_frag->size; 1751 pTxd->TBControl |= BMU_EOF;
1784#endif 1752#endif
1785 pTxdFst->TBControl |= BMU_OWN | BMU_SW; 1753 pTxdFst->TBControl |= BMU_OWN | BMU_SW;
1786
1787 } else {
1788 pTxd->TBControl |= sk_frag->size;
1789 } 1754 }
1790 pTxdLst = pTxd; 1755 pTxdLst = pTxd;
1791 pTxd = pTxd->pNextTxd; 1756 pTxd = pTxd->pNextTxd;
@@ -2032,7 +1997,6 @@ SK_U32 Control; /* control field of descriptor */
2032struct sk_buff *pMsg; /* pointer to message holding frame */ 1997struct sk_buff *pMsg; /* pointer to message holding frame */
2033struct sk_buff *pNewMsg; /* pointer to a new message for copying frame */ 1998struct sk_buff *pNewMsg; /* pointer to a new message for copying frame */
2034int FrameLength; /* total length of received frame */ 1999int FrameLength; /* total length of received frame */
2035int IpFrameLength;
2036SK_MBUF *pRlmtMbuf; /* ptr to a buffer for giving a frame to rlmt */ 2000SK_MBUF *pRlmtMbuf; /* ptr to a buffer for giving a frame to rlmt */
2037SK_EVPARA EvPara; /* an event parameter union */ 2001SK_EVPARA EvPara; /* an event parameter union */
2038unsigned long Flags; /* for spin lock */ 2002unsigned long Flags; /* for spin lock */
@@ -2045,10 +2009,6 @@ SK_BOOL IsMc;
2045SK_BOOL IsBadFrame; /* Bad frame */ 2009SK_BOOL IsBadFrame; /* Bad frame */
2046 2010
2047SK_U32 FrameStat; 2011SK_U32 FrameStat;
2048unsigned short Csum1;
2049unsigned short Csum2;
2050unsigned short Type;
2051int Result;
2052SK_U64 PhysAddr; 2012SK_U64 PhysAddr;
2053 2013
2054rx_start: 2014rx_start:
@@ -2177,8 +2137,8 @@ rx_start:
2177 (dma_addr_t) PhysAddr, 2137 (dma_addr_t) PhysAddr,
2178 FrameLength, 2138 FrameLength,
2179 PCI_DMA_FROMDEVICE); 2139 PCI_DMA_FROMDEVICE);
2180 eth_copy_and_sum(pNewMsg, pMsg->data, 2140 memcpy(pNewMsg->data, pMsg, FrameLength);
2181 FrameLength, 0); 2141
2182 pci_dma_sync_single_for_device(pAC->PciDev, 2142 pci_dma_sync_single_for_device(pAC->PciDev,
2183 (dma_addr_t) PhysAddr, 2143 (dma_addr_t) PhysAddr,
2184 FrameLength, 2144 FrameLength,
@@ -2206,69 +2166,16 @@ rx_start:
2206 2166
2207 /* set length in message */ 2167 /* set length in message */
2208 skb_put(pMsg, FrameLength); 2168 skb_put(pMsg, FrameLength);
2209 /* hardware checksum */ 2169 } /* frame > SK_COPY_TRESHOLD */
2210 Type = ntohs(*((short*)&pMsg->data[12]));
2211 2170
2212#ifdef USE_SK_RX_CHECKSUM 2171#ifdef USE_SK_RX_CHECKSUM
2213 if (Type == 0x800) { 2172 pMsg->csum = pRxd->TcpSums;
2214 Csum1=le16_to_cpu(pRxd->TcpSums & 0xffff); 2173 pMsg->ip_summed = CHECKSUM_HW;
2215 Csum2=le16_to_cpu((pRxd->TcpSums >> 16) & 0xffff);
2216 IpFrameLength = (int) ntohs((unsigned short)
2217 ((unsigned short *) pMsg->data)[8]);
2218
2219 /*
2220 * Test: If frame is padded, a check is not possible!
2221 * Frame not padded? Length difference must be 14 (0xe)!
2222 */
2223 if ((FrameLength - IpFrameLength) != 0xe) {
2224 /* Frame padded => TCP offload not possible! */
2225 pMsg->ip_summed = CHECKSUM_NONE;
2226 } else {
2227 /* Frame not padded => TCP offload! */
2228 if ((((Csum1 & 0xfffe) && (Csum2 & 0xfffe)) &&
2229 (pAC->GIni.GIChipId == CHIP_ID_GENESIS)) ||
2230 (pAC->ChipsetType)) {
2231 Result = SkCsGetReceiveInfo(pAC,
2232 &pMsg->data[14],
2233 Csum1, Csum2, pRxPort->PortIndex);
2234 if (Result ==
2235 SKCS_STATUS_IP_FRAGMENT ||
2236 Result ==
2237 SKCS_STATUS_IP_CSUM_OK ||
2238 Result ==
2239 SKCS_STATUS_TCP_CSUM_OK ||
2240 Result ==
2241 SKCS_STATUS_UDP_CSUM_OK) {
2242 pMsg->ip_summed =
2243 CHECKSUM_UNNECESSARY;
2244 }
2245 else if (Result ==
2246 SKCS_STATUS_TCP_CSUM_ERROR ||
2247 Result ==
2248 SKCS_STATUS_UDP_CSUM_ERROR ||
2249 Result ==
2250 SKCS_STATUS_IP_CSUM_ERROR_UDP ||
2251 Result ==
2252 SKCS_STATUS_IP_CSUM_ERROR_TCP ||
2253 Result ==
2254 SKCS_STATUS_IP_CSUM_ERROR ) {
2255 /* HW Checksum error */
2256 SK_DBG_MSG(NULL, SK_DBGMOD_DRV,
2257 SK_DBGCAT_DRV_RX_PROGRESS,
2258 ("skge: CRC error. Frame dropped!\n"));
2259 goto rx_failed;
2260 } else {
2261 pMsg->ip_summed =
2262 CHECKSUM_NONE;
2263 }
2264 }/* checksumControl calculation valid */
2265 } /* Frame length check */
2266 } /* IP frame */
2267#else 2174#else
2268 pMsg->ip_summed = CHECKSUM_NONE; 2175 pMsg->ip_summed = CHECKSUM_NONE;
2269#endif 2176#endif
2270 } /* frame > SK_COPY_TRESHOLD */ 2177
2271 2178
2272 SK_DBG_MSG(NULL, SK_DBGMOD_DRV, 1,("V")); 2179 SK_DBG_MSG(NULL, SK_DBGMOD_DRV, 1,("V"));
2273 ForRlmt = SK_RLMT_RX_PROTOCOL; 2180 ForRlmt = SK_RLMT_RX_PROTOCOL;
2274#if 0 2181#if 0
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-19 18:13:46 -0500