linux/net/caif/cffrml.c
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   1/*
   2 * CAIF Framing Layer.
   3 *
   45qOpy    *
5a href=5net/caif/cffrml.c#L4" 5d="L45   45Au   r: classSjur Brendeland/sjur.brandeland@stericssrc./cf2.a> *
6a href=6net/caif/cffrml.c#L4" 6d="L46   45License terms: GNU General Pubnet5License (GPL) vers  v222.a> *
7a href=7net/caif/cffrml.c#L4" 7d="L47   4/2.a> *
8a href=8net/caif/cffrml.c#L4" 8d="L48ax_prn class="comment"> *
9a href=9net/caif/cffrml.c#L4" 9d="L49ax_p#defffr	pr_fmtax_p(fmtax_p)	KBUILD_MODNAMEax_p ref="net/caifstrcla">":%   : "2.a>fmtax_p,	__func__ax_prn class="comment"> *
10a href="0net/caif/cffrml.c#L1" i0d="L"v2._prn class="comment"> *
1form>/strn f.h clatic/rn class="comment"> *
1/spinlock.hnet/caif/fn c">form>/spinlock.h clatic/rn class="comment"> *
1/slab.hnet/caif/fn c">form>/slab.h clatic/rn class="comment"> *
1/crc-ccitt.hnet/caif/fn c">form>/crc-ccitt.h clatic/rn class="comment"> *
15a href=15net/caif/cffrml.c#L4" 15d="L15 cla#in=nude <2 class="in=nude/form>/comdevice.hnet/caif/fn c">form>/comdevice.h clatic/rn class="comment"> *
16a href=16net/caif/cffrml.c#L4" 16d="L16 cla#in=nude <2 class="in=nude/comment"> nt"_l="comhnet/caif/fn c">comment"> nt"_l="comh clatic/rn class="comment"> *
17a href=17net/caif/cffrml.c#L4" 17d="L17 cla#in=nude <2 class="in=nude/comment"> fpkt.hnet/caif/fn c">comment"> fpkt.h clatic/rn class="comment"> *
18a href=18net/caif/cffrml.c#L4" 18d="L18 cla#in=nude <2 class="in=nude/comment"> fcomment"> f *
19a href=19net/caif/cffrml.c#L4" 19d="L192._prn class="comment"> *
20a href=20net/caif/cffrml.c#L1" 20d="L20ax_p#defffr	d="caffrr_objax_p(l="rax_p)	d="caffrr_ofax_p(l="rax_p, struct	d*l="erax_p)rn class="comment"> *
2 *
2d* *
2d*l="coax_p rspan clascode=l="co
    
l="erax_p/rn class="comment"> * 2boopax_p rspan clascode=dofcs
dofcsax_p/ ss="line" name="L1"> 1 !< FCSan> ve 4/2.a> * 25a href=25net/caif/cffrml.c#L4" 25d="L25 cla int __percpu cla *pcpuearfcntax_p/rn class="comment"> * 26a href=26net/caif/cffrml.c#L4" 26d="L26 cla}/rn class="comment"> * 27a href=27net/caif/cffrml.c#L4" 27d="L272._prn class="comment"> * 28a href=28net/caif/cffrml.c#L4" 28d="L28 clastml.c int d*d*l="coax_p *l="rax_p, struct d*pktax_p *pktax_p)/rn class="comment"> * 29a href=29net/caif/cffrml.c#L4" 29d="L29 clastml.c int d*d*l="coax_p *l="rax_p, struct d*pktax_p *pktax_p)/rn class="comment"> * 30a href=30net/caif/cffrml.c#L1" 30d="L30 clastml.c void d*d*l="coax_p *l="rax_p, enum dnt"_ctrlcmdax_p rspan clascode=ctrl"
dtrlax_p,rn class="comment"> * 3phyidax_p)/rn class="comment"> * 3 * 3u322._p d* * 3u322._p d* * 35a href=35net/caif/cffrml.c#L4" 35d="L35 clastruct d*l="coax_p *d*u16 cla phyidax_p, boopax_p rspan clascode=use_fcs
use_fcsax_p)rn class="comment"> * 36a href=36net/caif/cffrml.c#L4" 36d="L36 cla{rn class="comment"> * 37a href=37net/caif/cffrml.c#L4" 37d="L37 cla struct d* onsax_p = kzallocax_p(sizeof(struct d*GFP_ATOMICax_p)/rn class="comment"> * 38a href=38net/caif/cffrml.c#L4" 38d="L38 cla if (! onsax_p)rn class="comment"> * 39a href=39net/caif/cffrml.c#L4" 39d="L39 cla +*" metNULLax_p/rn class="comment"> * 40a href=40net/caif/cffrml.c#L1" 40d="L40 cla rspan clascode= ons
onsax_p-tic/pcpuearfcntax_p = alloc_percpuax_p(int)/rn class="comment"> * 4 onsax_p-tic/pcpuearfcntax_p == NULLax_p) {rn class="comment"> * 4kfreeax_p( onsax_p)/rn class="comment"> * 4NULLax_p/rn class="comment"> * 4 * 45a href=45net/caif/cffrml.c#L4" 45d="L452._prn class="comment"> * 46a href=46net/caif/cffrml.c#L4" 46d="L46 cla rspan clascode=dnt"_caiert
dnt"_caiertax_p(offsetofax_p(struct d*l="erax_p) == 0)/rn class="comment"> * 47a href=47net/caif/cffrml.c#L4" 47d="L472._prn class="comment"> * 48a href=48net/caif/cffrml.c#L4" 48d="L48 cla rspan clascode= ons
onsax_p-tic/l="erax_p.arce veax_p = d* * 49a href=49net/caif/cffrml.c#L4" 49d="L49 cla rspan clascode= ons
onsax_p-tic/l="erax_p.transrchax_p = d* * 50a href=50net/caif/cffrml.c#L1" 50d="L50 cla rspan clascode= ons
onsax_p-tic/l="erax_p.dtrlcmdax_p = d* * 5snprintfax_p( onsax_p-tic/l="erax_p..c#Lax_p, <_LAYER_NAME_SZ
/a><_LAYER_NAME_SZax_p, "phyidax_p)/rn class="comment"> * 5 onsax_p-tic/dofcsax_p = use_fcsax_p/rn class="comment"> * 5 onsax_p-tic/l="erax_p.idax_p = phyidax_p/rn class="comment"> * 5d*l="coax_p *) onsax_p/rn class="comment"> * 55a href=55net/caif/cffrml.c#L4" 55d="L552._p}rn class="comment"> * 56a href=56net/caif/cffrml.c#L4" 56d="L562._prn class="comment"> * 57a href=57net/caif/cffrml.c#L4" 57d="L572._pvoid *d*l="coax_p *l="erax_p)rn class="comment"> * 58a href=58net/caif/cffrml.c#L4" 58d="L58 cla{rn class="comment"> * 59a href=59net/caif/cffrml.c#L4" 59d="L59 cla struct d* onsax_p = d="caffrr_objax_p(l="erax_p)/rn class="comment"> * 60a href=60net/caif/cffrml.c#L1" 60d="L60 cla rspan clascode=free_percpu
free_percpuax_p( onsax_p-tic/pcpuearfcntax_p)/rn class="comment"> * 6kfreeax_p(l="erax_p)/rn class="comment"> * 6 * 6 * 6d*d*l="coax_p * onsax_p, struct d*l="coax_p *upax_p)rn class="comment"> * 65a href=65net/caif/cffrml.c#L4" 65d="L65 cla{rn class="comment"> * 66a href=66net/caif/cffrml.c#L4" 66d="L66 cla rspan clascode= ons
onsax_p-tic/upax_p = upax_p/rn class="comment"> * 67a href=67net/caif/cffrml.c#L4" 67d="L672._p}rn class="comment"> * 68a href=68net/caif/cffrml.c#L4" 68d="L68ax_prn class="comment"> * 69a href=69net/caif/cffrml.c#L4" 69d="L692._pvoid d*d*l="coax_p * onsax_p, struct d*l="coax_p *dnax_p)rn class="comment"> * 70a href=70net/caif/cffrml.c#L1" 70d="L70 cla{rn class="comment"> * 7 onsax_p-tic/dnax_p = dnax_p/rn class="comment"> * 7 * 7 * 7u16 cla d*u16 cla chksax_p, void *bufax_p, u16 cla lenax_p)rn class="comment"> * 75a href=75net/caif/cffrml.c#L4" 75d="L75 cla{rn class="comment"> * 76a href=76net/caif/cffrml.c#L4" 76d="L76 cla rs="line" name="L1"> 1 FIXME: FCSashould be moved to glue in order to use OS-Specific2.a> * 77a href=77net/caif/cffrml.c#L4" 77d="L77 * solu s2.a> * 78a href=78net/caif/cffrml.c#L4" 78d="L78 */2.a> * 79a href=79net/caif/cffrml.c#L4" 79d="L79 cla +*" metcrc_ccittax_p(chksax_p, bufax_p, lenax_p)/rn class="comment"> * 80a href=80net/caif/cffrml.c#L1" 80d="L802._p}rn class="comment"> * 8 * 8d*d*l="coax_p *l="rax_p, struct d*pktax_p *pktax_p)rn class="comment"> * 8 * 8u16 cla tm"ax_p/rn class="comment"> * 85a href=85net/caif/cffrml.c#L4" 85d="L85 cla rspan clascode=u16net/caif/ n c">u16 cla lenax_p/rn class="comment"> * 86a href=86net/caif/cffrml.c#L4" 86d="L86 cla rspan clascode=u16net/caif/ n c">u16 cla hdrchksax_p/rn class="comment"> * 87a href=87net/caif/cffrml.c#L4" 87d="L87 cla rspan clascode=u16net/caif/ n c">u16 cla pktchksax_p/rn class="comment"> * 88a href=88net/caif/cffrml.c#L4" 88d="L88 cla struct d* onsax_p/rn class="comment"> * 89a href=89net/caif/cffrml.c#L4" 89d="L89 cla rspan clascode= ons
onsax_p = d="caffrr_objax_p(l="rax_p)/rn class="comment"> * 90a href=90net/caif/cffrml.c#L1" 90d="L9v2._prn class="comment"> * 9d*pkt_extr_ pktax_p, &/tm"ax_p, 2)/rn class="comment"> * 9lenax_p = le16_to_cpuax_p(tm"ax_p)/rn class="comment"> * 9 * 9 1 Subtract for FCSaon length if FCSais not used. */2.a> * 95a href=95net/caif/cffrml.c#L4" 95d="L95 cla if (! onsax_p-tic/dofcsax_p)rn class="comment"> * 96a href=96net/caif/cffrml.c#L4" 96d="L96 cla rspan clascode=len
lenax_p -= 2/rn class="comment"> * 97a href=97net/caif/cffrml.c#L4" 97d="L972._prn class="comment"> * 98a href=98net/caif/cffrml.c#L4" 98d="L98 cla if (rspan clascode=d*pkt_setlen
d*pkt_setlenax_p(pktax_p, lenax_p) < 0) {rn class="comment"> * 99a href=99net/caif/cffrml.c#L4" 99d="L99 cla ++d* * 100a href="00net/caif/cffrml.c#L1" i00d="i00 cla rspan clascode=pr_err
pr_errax_p("pan claslength erroo (%d)\n"2.a>lenax_p)/rn class="comment"> * 10d*pkt_destroyax_p(pktax_p)/rn class="comment"> * 10EPROTOax_p/rn class="comment"> * 10 * 10 12.a> * 105a href=105net/caif/cffrml.c#L4" 105d="i05 * Don't do extract if FCSais hod=", rather do setlen - then we don't2.a> * 106a href=106net/caif/cffrml.c#L4" 106d="i06 * get a cache-missmment"> * CAIF Framing Layer. 107a href=107net/caif/cffrml.c#L4" 107d="i07 */2.a> * 108a href=108net/caif/cffrml.c#L4" 108d="i08 cla if (rspan clascode= ons
onsax_p-tic/dofcsax_p) {rn class="comment"> * 109a href=109net/caif/cffrml.c#L4" 109d="i09 cla rspan clascode=d*pkt_extr_traip
d*pkt_extr_traipax_p(pktax_p, &/tm"ax_p, 2)/rn class="comment"> * 110a href=""0net/caif/cffrml.c#L1" ii0d="110 cla rspan clascode=hdrchks
hdrchksax_p = le16_to_cpuax_p(tm"ax_p)/rn class="comment"> * 11pktchksax_p = d*pkt_iterateax_p(pktax_p, d* * 11pktchksax_p != hdrchksax_p) {rn class="comment"> * 11d*pkt_add_traipax_p(pktax_p, &/tm"ax_p, 2)/rn class="comment"> * 11d* * 115a href=115net/caif/cffrml.c#L4" 115d="115 cla ++d* * 116a href=116net/caif/cffrml.c#L4" 116d="116 cla rspan clascode=pr_info
pr_infoax_p("pan e checksum erroo (0x%x != 0x%x)\n"2.a> * 117a href=117net/caif/cffrml.c#L4" 117d="117 cla rspan clascode=hdrchks
hdrchksax_p, pktchksax_p)/rn class="comment"> * 118a href=118net/caif/cffrml.c#L4" 118d="118 cla +*" met-EILSEQax_p/rn class="comment"> * 119a href=119net/caif/cffrml.c#L4" 119d="119 cla }rn class="comment"> * 120a href=120net/caif/cffrml.c#L1" 120d="120 cla }rn class="comment"> * 12c*pkt_erroneousax_p(pktax_p)) {rn class="comment"> * 12d* * 12pr_errax_p("Packet is erroneous!\n"2.a> * 12d*pkt_destroyax_p(pktax_p)/rn class="comment"> * 125a href=125net/caif/cffrml.c#L4" 125d="125 cla +*" met-EPROTOax_p/rn class="comment"> * 126a href=126net/caif/cffrml.c#L4" 126d="126 cla }rn class="comment"> * 127a href=127net/caif/cffrml.c#L4" 127d="1272._prn class="comment"> * 128a href=128net/caif/cffrml.c#L4" 128d="128 cla if (rspan clascode=l="r
l="rax_p-tic/upax_p == NULLax_p) {rn class="comment"> * 129a href=129net/caif/cffrml.c#L4" 129d="129 cla rspan clascode=pr_err
pr_errax_p("L="r up is misscla!\n"2.a> * 130a href=130net/caif/cffrml.c#L1" 130d="130 cla rspan clascode=d*pkt_destroy
d*pkt_destroyax_p(pktax_p)/rn class="comment"> * 13EINVALax_p/rn class="comment"> * 13 * 13 * 13l="rax_p-tic/upax_p-tic/arce veax_p(rspan clascode=l="r
l="rax_p-tic/upax_p, pktax_p)/rn class="comment"> * 135a href=135net/caif/cffrml.c#L4" 135d="1352._p}rn class="comment"> * 136a href=136net/caif/cffrml.c#L4" 136d="1362._prn class="comment"> * 137a href=137net/caif/cffrml.c#L4" 137d="137 clastml.c int d*d*l="coax_p *l="rax_p, struct d*pktax_p *pktax_p)rn class="comment"> * 138a href=138net/caif/cffrml.c#L4" 138d="138 cla{rn class="comment"> * 139a href=139net/caif/cffrml.c#L4" 139d="139 cla rspan clascode=u16net/caif/ n c">u16 cla chksax_p/rn class="comment"> * 1<0a href=140net/caif/cffrml.c#L1" 140d="140 cla rspan clascode=u16net/caif/ n c">u16 cla lenax_p/rn class="comment"> * 14__le16 cla dataax_p/rn class="comment"> * 14 * 14d* onsax_p = d="caffrr_objax_p(l="rax_p)/rn class="comment"> * 14 onsax_p-tic/dofcsax_p) {rn class="comment"> * 145a href=145net/caif/cffrml.c#L4" 145d="145 cla chksax_p = d*pkt_iterateax_p(pktax_p, d* * 146a href=146net/caif/cffrml.c#L4" 146d="146 cla rspan clascode=data
dataax_p = pu_to_le16ax_p(chksax_p)/rn class="comment"> * 147a href=147net/caif/cffrml.c#L4" 147d="147 cla rspan clascode=d*pkt_add_traip
d*pkt_add_traipax_p(pktax_p, &/dataax_p, 2)/rn class="comment"> * 148a href=148net/caif/cffrml.c#L4" 148d="148 cla } else {rn class="comment"> * 149a href=149net/caif/cffrml.c#L4" 149d="149 cla rspan clascode=d*pkt_pad_traip
d*pkt_pad_traipax_p(pktax_p, 2)/rn class="comment"> * 150a href=150net/caif/cffrml.c#L1" 150d="150 cla }rn class="comment"> * 15lenax_p = d*pkt_getlenax_p(pktax_p)/rn class="comment"> * 15dataax_p = pu_to_le16ax_p(lenax_p)/rn class="comment"> * 15d*pkt_add_ pktax_p, &/dataax_p, 2)/rn class="comment"> * 15d*pkt_infoax_p(pktax_p)-tic/hdr_len cla += 2/rn class="comment"> * 155a href=155net/caif/cffrml.c#L4" 155d="155 cla if (rspan clascode=d*pkt_erroneous
c*pkt_erroneousax_p(pktax_p)) {rn class="comment"> * 156a href=156net/caif/cffrml.c#L4" 156d="156 cla rspan clascode=pr_err
pr_errax_p("Packet is erroneous!\n"2.a> * 157a href=157net/caif/cffrml.c#L4" 157d="157 cla rspan clascode=d*pkt_destroy
d*pkt_destroyax_p(pktax_p)/rn class="comment"> * 158a href=158net/caif/cffrml.c#L4" 158d="158 cla +*" met-EPROTOax_p/rn class="comment"> * 159a href=159net/caif/cffrml.c#L4" 159d="159 cla }rn class="comment"> * 160a href=160net/caif/cffrml.c#L1" 160d="16v2._prn class="comment"> * 16l="rax_p-tic/dnax_p == NULLax_p) {rn class="comment"> * 16d*pkt_destroyax_p(pktax_p)/rn class="comment"> * 16ENODEVax_p/rn class="comment"> * 16 * 165a href=165net/caif/cffrml.c#L4" 165d="165 cla }rn class="comment"> * 166a href=166net/caif/cffrml.c#L4" 166d="166 cla +*" metrspan clascode=l="r
l="rax_p-tic/dnax_p-tic/transrchax_p(rspan clascode=l="r
l="rax_p-tic/dnax_p, pktax_p)/rn class="comment"> * 167a href=167net/caif/cffrml.c#L4" 167d="1672._p}rn class="comment"> * 168a href=168net/caif/cffrml.c#L4" 168d="168ax_prn class="comment"> * 169a href=169net/caif/cffrml.c#L4" 169d="169 clastml.c void d*d*l="coax_p *l="rax_p, enum dnt"_ctrlcmdax_p rspan clascode=ctrl"
dtrlax_p,rn class="comment"> * 170a href=170net/caif/cffrml.c#L1" 170d="170 cla int phyidax_p)rn class="comment"> * 17 * 17l="rax_p-tic/upax_p &/&/trspan clascode=l="r
l="rax_p-tic/upax_p-tic/dtrlcmdax_p)rn class="comment"> * 17l="rax_p-tic/upax_p-tic/dtrlcmdax_p(rspan clascode=l="r
l="rax_p-tic/upax_p, dtrlax_p, rspan clascode=l="r
l="rax_p-tic/idax_p)/rn class="comment"> * 17 * 175a href=175net/caif/cffrml.c#L4" 175d="1752._prn class="comment"> * 176a href=176net/caif/cffrml.c#L4" 176d="176 clavoid d*d*l="coax_p *l="rax_p)rn class="comment"> * 177a href=177net/caif/cffrml.c#L4" 177d="177 * 178a href=178net/caif/cffrml.c#L4" 178d="178 cla struct d* onsax_p = d="caffrr_objax_p(l="rax_p)/rn class="comment"> * 179a href=179net/caif/cffrml.c#L4" 179d="179 cla if (rspan clascode=l="r
l="rax_p != NULLax_p &/&/trspan clascode= ons
onsax_p-tic/pcpuearfcntax_p != NULLax_p)rn class="comment"> * 180a href=180net/caif/cffrml.c#L1" 180d="180 cla rspan clascode= ons_cpu_dec
ons_cpu_decax_p(* onsax_p-tic/pcpuearfcntax_p)/rn class="comment"> * 18 * 18 * 18d*d*l="coax_p *l="rax_p)rn class="comment"> * 18 * 185a href=185net/caif/cffrml.c#L4" 185d="185 cla struct d* onsax_p = d="caffrr_objax_p(l="rax_p)/rn class="comment"> * 186a href=186net/caif/cffrml.c#L4" 186d="186 cla if (rspan clascode=l="r
l="rax_p != NULLax_p &/&/trspan clascode= ons
onsax_p-tic/pcpuearfcntax_p != NULLax_p)rn class="comment"> * 187a href=187net/caif/cffrml.c#L4" 187d="187 cla rspan clascode= ons_cpu_inc
ons_cpu_incax_p(* onsax_p-tic/pcpuearfcntax_p)/rn class="comment"> * 188a href=188net/caif/cffrml.c#L4" 188d="188 cla}rn class="comment"> * 189a href=189net/caif/cffrml.c#L4" 189d="1892._prn class="comment"> * 190a href=190net/caif/cffrml.c#L1" 190d="19v2._pint d*d*l="coax_p *l="rax_p)rn class="comment"> * 19 * 19iax_p, rspan clascode=arfcnt
rrfcntax_p = 0/rn class="comment"> * 19d* onsax_p = d="caffrr_objax_p(l="rax_p)/rn class="comment"> * 19for_each_possible_cpuax_p(iax_p)rn class="comment"> * 195a href=195net/caif/cffrml.c#L4" 195d="195 cla rrfcntax_p += *prr_cpueptrax_p( onsax_p-tic/pcpuearfcntax_p, rspan clascode=i"
iax_p)/rn class="comment"> * 196a href=196net/caif/cffrml.c#L4" 196d="196 cla +*" metrspan clascode=arfcnt
rrfcntax_p/rn class="comment"> * 197a href=197net/caif/cffrml.c#L4" 197d="1972._p}rn class="comment"> * 198a href=198net/caif/cffrml.c#L4" 198d="198 cla
The original LXR software by thetrspan clahttp://sourceforge.commprojects/lxo >LXR /cffunityax_p, ons exprrif4">al version by rspan clamailto:lxo@cffux.no">lxo@cffux.noax_p.
lxo.cffux.no kindly hosted by rspan clahttp://www.redpill-cffpro.no">Redpill Lffpro ASax_p, provider of Lffux /cnsultclasand operat s services since"1995.