2 * Copyright (C) ST-Ericsson AB 2010
3 * Author: Sjur Brendeland/sjur.brandeland@stericsson.com
4 * License terms: GNU General Public License (GPL) version 2
7 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
9 #include <linux/kernel.h>
10 #include <linux/stddef.h>
11 #include <linux/slab.h>
12 #include <linux/netdevice.h>
13 #include <linux/module.h>
14 #include <net/caif/caif_layer.h>
15 #include <net/caif/cfpkt.h>
16 #include <net/caif/cfcnfg.h>
17 #include <net/caif/cfctrl.h>
18 #include <net/caif/cfmuxl.h>
19 #include <net/caif/cffrml.h>
20 #include <net/caif/cfserl.h>
21 #include <net/caif/cfsrvl.h>
22 #include <net/caif/caif_dev.h>
24 #define container_obj(layr) container_of(layr, struct cfcnfg, layer)
26 /* Information about CAIF physical interfaces held by Config Module in order
27 * to manage physical interfaces
29 struct cfcnfg_phyinfo
{
30 struct list_head node
;
33 /* Pointer to the layer below the MUX (framing layer) */
34 struct cflayer
*frm_layer
;
35 /* Pointer to the lowest actual physical layer */
36 struct cflayer
*phy_layer
;
37 /* Unique identifier of the physical interface */
39 /* Preference of the physical in interface */
40 enum cfcnfg_phy_preference pref
;
42 /* Information about the physical device */
43 struct dev_info dev_info
;
48 /* Use Start of frame extension */
51 /* Use Start of frame checksum */
59 struct list_head phys
;
63 static void cfcnfg_linkup_rsp(struct cflayer
*layer
, u8 channel_id
,
64 enum cfctrl_srv serv
, u8 phyid
,
65 struct cflayer
*adapt_layer
);
66 static void cfcnfg_linkdestroy_rsp(struct cflayer
*layer
, u8 channel_id
);
67 static void cfcnfg_reject_rsp(struct cflayer
*layer
, u8 channel_id
,
68 struct cflayer
*adapt_layer
);
69 static void cfctrl_resp_func(void);
70 static void cfctrl_enum_resp(void);
72 struct cfcnfg
*cfcnfg_create(void)
75 struct cfctrl_rsp
*resp
;
79 /* Initiate this layer */
80 this = kzalloc(sizeof(struct cfcnfg
), GFP_ATOMIC
);
82 pr_warn("Out of memory\n");
85 this->mux
= cfmuxl_create();
88 this->ctrl
= cfctrl_create();
91 /* Initiate response functions */
92 resp
= cfctrl_get_respfuncs(this->ctrl
);
93 resp
->enum_rsp
= cfctrl_enum_resp
;
94 resp
->linkerror_ind
= cfctrl_resp_func
;
95 resp
->linkdestroy_rsp
= cfcnfg_linkdestroy_rsp
;
96 resp
->sleep_rsp
= cfctrl_resp_func
;
97 resp
->wake_rsp
= cfctrl_resp_func
;
98 resp
->restart_rsp
= cfctrl_resp_func
;
99 resp
->radioset_rsp
= cfctrl_resp_func
;
100 resp
->linksetup_rsp
= cfcnfg_linkup_rsp
;
101 resp
->reject_rsp
= cfcnfg_reject_rsp
;
102 INIT_LIST_HEAD(&this->phys
);
104 cfmuxl_set_uplayer(this->mux
, this->ctrl
, 0);
105 layer_set_dn(this->ctrl
, this->mux
);
106 layer_set_up(this->ctrl
, this);
107 mutex_init(&this->lock
);
111 pr_warn("Out of memory\n");
120 EXPORT_SYMBOL(cfcnfg_create
);
122 void cfcnfg_remove(struct cfcnfg
*cfg
)
134 static void cfctrl_resp_func(void)
138 static struct cfcnfg_phyinfo
*cfcnfg_get_phyinfo_rcu(struct cfcnfg
*cnfg
,
141 struct cfcnfg_phyinfo
*phy
;
143 list_for_each_entry_rcu(phy
, &cnfg
->phys
, node
)
144 if (phy
->id
== phyid
)
149 static void cfctrl_enum_resp(void)
153 static struct dev_info
*cfcnfg_get_phyid(struct cfcnfg
*cnfg
,
154 enum cfcnfg_phy_preference phy_pref
)
156 /* Try to match with specified preference */
157 struct cfcnfg_phyinfo
*phy
;
159 list_for_each_entry_rcu(phy
, &cnfg
->phys
, node
) {
160 if (phy
->up
&& phy
->pref
== phy_pref
&&
161 phy
->frm_layer
!= NULL
)
163 return &phy
->dev_info
;
166 /* Otherwise just return something */
167 list_for_each_entry_rcu(phy
, &cnfg
->phys
, node
)
169 return &phy
->dev_info
;
174 static int cfcnfg_get_id_from_ifi(struct cfcnfg
*cnfg
, int ifi
)
176 struct cfcnfg_phyinfo
*phy
;
178 list_for_each_entry_rcu(phy
, &cnfg
->phys
, node
)
179 if (phy
->ifindex
== ifi
&& phy
->up
)
184 int caif_disconnect_client(struct net
*net
, struct cflayer
*adap_layer
)
188 struct cflayer
*servl
= NULL
;
189 struct cfcnfg
*cfg
= get_cfcnfg(net
);
191 caif_assert(adap_layer
!= NULL
);
193 channel_id
= adap_layer
->id
;
194 if (adap_layer
->dn
== NULL
|| channel_id
== 0) {
195 pr_err("adap_layer->dn == NULL or adap_layer->id is 0\n");
200 servl
= cfmuxl_remove_uplayer(cfg
->mux
, channel_id
);
202 pr_err("PROTOCOL ERROR - "
203 "Error removing service_layer Channel_Id(%d)",
209 ret
= cfctrl_linkdown_req(cfg
->ctrl
, channel_id
, adap_layer
);
212 cfctrl_cancel_req(cfg
->ctrl
, adap_layer
);
214 /* Do RCU sync before initiating cleanup */
216 if (adap_layer
->ctrlcmd
!= NULL
)
217 adap_layer
->ctrlcmd(adap_layer
, CAIF_CTRLCMD_DEINIT_RSP
, 0);
221 EXPORT_SYMBOL(caif_disconnect_client
);
223 static void cfcnfg_linkdestroy_rsp(struct cflayer
*layer
, u8 channel_id
)
227 static const int protohead
[CFCTRL_SRV_MASK
] = {
228 [CFCTRL_SRV_VEI
] = 4,
229 [CFCTRL_SRV_DATAGRAM
] = 7,
230 [CFCTRL_SRV_UTIL
] = 4,
231 [CFCTRL_SRV_RFM
] = 3,
232 [CFCTRL_SRV_DBG
] = 3,
236 static int caif_connect_req_to_link_param(struct cfcnfg
*cnfg
,
237 struct caif_connect_request
*s
,
238 struct cfctrl_link_param
*l
)
240 struct dev_info
*dev_info
;
241 enum cfcnfg_phy_preference pref
;
244 memset(l
, 0, sizeof(*l
));
245 /* In caif protocol low value is high priority */
246 l
->priority
= CAIF_PRIO_MAX
- s
->priority
+ 1;
248 if (s
->ifindex
!= 0) {
249 res
= cfcnfg_get_id_from_ifi(cnfg
, s
->ifindex
);
254 switch (s
->link_selector
) {
255 case CAIF_LINK_HIGH_BANDW
:
256 pref
= CFPHYPREF_HIGH_BW
;
258 case CAIF_LINK_LOW_LATENCY
:
259 pref
= CFPHYPREF_LOW_LAT
;
264 dev_info
= cfcnfg_get_phyid(cnfg
, pref
);
265 if (dev_info
== NULL
)
267 l
->phyid
= dev_info
->id
;
269 switch (s
->protocol
) {
271 l
->linktype
= CFCTRL_SRV_VEI
;
272 l
->endpoint
= (s
->sockaddr
.u
.at
.type
>> 2) & 0x3;
273 l
->chtype
= s
->sockaddr
.u
.at
.type
& 0x3;
275 case CAIFPROTO_DATAGRAM
:
276 l
->linktype
= CFCTRL_SRV_DATAGRAM
;
278 l
->u
.datagram
.connid
= s
->sockaddr
.u
.dgm
.connection_id
;
280 case CAIFPROTO_DATAGRAM_LOOP
:
281 l
->linktype
= CFCTRL_SRV_DATAGRAM
;
284 l
->u
.datagram
.connid
= s
->sockaddr
.u
.dgm
.connection_id
;
287 l
->linktype
= CFCTRL_SRV_RFM
;
288 l
->u
.datagram
.connid
= s
->sockaddr
.u
.rfm
.connection_id
;
289 strncpy(l
->u
.rfm
.volume
, s
->sockaddr
.u
.rfm
.volume
,
290 sizeof(l
->u
.rfm
.volume
)-1);
291 l
->u
.rfm
.volume
[sizeof(l
->u
.rfm
.volume
)-1] = 0;
294 l
->linktype
= CFCTRL_SRV_UTIL
;
297 strncpy(l
->u
.utility
.name
, s
->sockaddr
.u
.util
.service
,
298 sizeof(l
->u
.utility
.name
)-1);
299 l
->u
.utility
.name
[sizeof(l
->u
.utility
.name
)-1] = 0;
300 caif_assert(sizeof(l
->u
.utility
.name
) > 10);
301 l
->u
.utility
.paramlen
= s
->param
.size
;
302 if (l
->u
.utility
.paramlen
> sizeof(l
->u
.utility
.params
))
303 l
->u
.utility
.paramlen
= sizeof(l
->u
.utility
.params
);
305 memcpy(l
->u
.utility
.params
, s
->param
.data
,
306 l
->u
.utility
.paramlen
);
309 case CAIFPROTO_DEBUG
:
310 l
->linktype
= CFCTRL_SRV_DBG
;
311 l
->endpoint
= s
->sockaddr
.u
.dbg
.service
;
312 l
->chtype
= s
->sockaddr
.u
.dbg
.type
;
320 int caif_connect_client(struct net
*net
, struct caif_connect_request
*conn_req
,
321 struct cflayer
*adap_layer
, int *ifindex
,
325 struct cflayer
*frml
;
326 struct cfcnfg_phyinfo
*phy
;
328 struct cfctrl_link_param param
;
329 struct cfcnfg
*cfg
= get_cfcnfg(net
);
330 caif_assert(cfg
!= NULL
);
333 err
= caif_connect_req_to_link_param(cfg
, conn_req
, ¶m
);
337 phy
= cfcnfg_get_phyinfo_rcu(cfg
, param
.phyid
);
344 if (adap_layer
== NULL
) {
345 pr_err("adap_layer is zero\n");
348 if (adap_layer
->receive
== NULL
) {
349 pr_err("adap_layer->receive is NULL\n");
352 if (adap_layer
->ctrlcmd
== NULL
) {
353 pr_err("adap_layer->ctrlcmd == NULL\n");
358 frml
= phy
->frm_layer
;
360 pr_err("Specified PHY type does not exist!\n");
363 caif_assert(param
.phyid
== phy
->id
);
364 caif_assert(phy
->frm_layer
->id
==
366 caif_assert(phy
->phy_layer
->id
==
369 *ifindex
= phy
->ifindex
;
373 protohead
[param
.linktype
] + (phy
->use_stx
? 1 : 0);
377 /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */
378 cfctrl_enum_req(cfg
->ctrl
, param
.phyid
);
379 return cfctrl_linkup_request(cfg
->ctrl
, ¶m
, adap_layer
);
385 EXPORT_SYMBOL(caif_connect_client
);
387 static void cfcnfg_reject_rsp(struct cflayer
*layer
, u8 channel_id
,
388 struct cflayer
*adapt_layer
)
390 if (adapt_layer
!= NULL
&& adapt_layer
->ctrlcmd
!= NULL
)
391 adapt_layer
->ctrlcmd(adapt_layer
,
392 CAIF_CTRLCMD_INIT_FAIL_RSP
, 0);
396 cfcnfg_linkup_rsp(struct cflayer
*layer
, u8 channel_id
, enum cfctrl_srv serv
,
397 u8 phyid
, struct cflayer
*adapt_layer
)
399 struct cfcnfg
*cnfg
= container_obj(layer
);
400 struct cflayer
*servicel
= NULL
;
401 struct cfcnfg_phyinfo
*phyinfo
;
402 struct net_device
*netdev
;
406 if (adapt_layer
== NULL
) {
407 pr_debug("link setup response but no client exist,"
408 "send linkdown back\n");
409 cfctrl_linkdown_req(cnfg
->ctrl
, channel_id
, NULL
);
413 caif_assert(cnfg
!= NULL
);
414 caif_assert(phyid
!= 0);
416 phyinfo
= cfcnfg_get_phyinfo_rcu(cnfg
, phyid
);
417 if (phyinfo
== NULL
) {
418 pr_err("ERROR: Link Layer Device dissapeared"
419 "while connecting\n");
423 caif_assert(phyinfo
!= NULL
);
424 caif_assert(phyinfo
->id
== phyid
);
425 caif_assert(phyinfo
->phy_layer
!= NULL
);
426 caif_assert(phyinfo
->phy_layer
->id
== phyid
);
428 adapt_layer
->id
= channel_id
;
432 servicel
= cfvei_create(channel_id
, &phyinfo
->dev_info
);
434 case CFCTRL_SRV_DATAGRAM
:
435 servicel
= cfdgml_create(channel_id
,
439 netdev
= phyinfo
->dev_info
.dev
;
440 servicel
= cfrfml_create(channel_id
, &phyinfo
->dev_info
,
443 case CFCTRL_SRV_UTIL
:
444 servicel
= cfutill_create(channel_id
, &phyinfo
->dev_info
);
446 case CFCTRL_SRV_VIDEO
:
447 servicel
= cfvidl_create(channel_id
, &phyinfo
->dev_info
);
450 servicel
= cfdbgl_create(channel_id
, &phyinfo
->dev_info
);
453 pr_err("Protocol error. Link setup response "
454 "- unknown channel type\n");
458 pr_warn("Out of memory\n");
461 layer_set_dn(servicel
, cnfg
->mux
);
462 cfmuxl_set_uplayer(cnfg
->mux
, servicel
, channel_id
);
463 layer_set_up(servicel
, adapt_layer
);
464 layer_set_dn(adapt_layer
, servicel
);
468 servicel
->ctrlcmd(servicel
, CAIF_CTRLCMD_INIT_RSP
, 0);
475 cfcnfg_add_phy_layer(struct cfcnfg
*cnfg
, enum cfcnfg_phy_type phy_type
,
476 struct net_device
*dev
, struct cflayer
*phy_layer
,
477 enum cfcnfg_phy_preference pref
,
480 struct cflayer
*frml
;
481 struct cflayer
*phy_driver
= NULL
;
482 struct cfcnfg_phyinfo
*phyinfo
;
486 mutex_lock(&cnfg
->lock
);
488 /* CAIF protocol allow maximum 6 link-layers */
489 for (i
= 0; i
< 7; i
++) {
490 phyid
= (dev
->ifindex
+ i
) & 0x7;
493 if (cfcnfg_get_phyinfo_rcu(cnfg
, phyid
) == NULL
)
496 pr_warn("Too many CAIF Link Layers (max 6)\n");
500 phyinfo
= kzalloc(sizeof(struct cfcnfg_phyinfo
), GFP_ATOMIC
);
505 cfserl_create(CFPHYTYPE_FRAG
, phyid
, stx
);
507 pr_warn("Out of memory\n");
517 phy_layer
->id
= phyid
;
518 phyinfo
->pref
= pref
;
520 phyinfo
->dev_info
.id
= phyid
;
521 phyinfo
->dev_info
.dev
= dev
;
522 phyinfo
->phy_layer
= phy_layer
;
523 phyinfo
->ifindex
= dev
->ifindex
;
524 phyinfo
->use_stx
= stx
;
525 phyinfo
->use_fcs
= fcs
;
527 phy_layer
->type
= phy_type
;
528 frml
= cffrml_create(phyid
, fcs
);
531 pr_warn("Out of memory\n");
535 phyinfo
->frm_layer
= frml
;
536 layer_set_up(frml
, cnfg
->mux
);
538 if (phy_driver
!= NULL
) {
539 phy_driver
->id
= phyid
;
540 layer_set_dn(frml
, phy_driver
);
541 layer_set_up(phy_driver
, frml
);
542 layer_set_dn(phy_driver
, phy_layer
);
543 layer_set_up(phy_layer
, phy_driver
);
545 layer_set_dn(frml
, phy_layer
);
546 layer_set_up(phy_layer
, frml
);
549 list_add_rcu(&phyinfo
->node
, &cnfg
->phys
);
551 mutex_unlock(&cnfg
->lock
);
553 EXPORT_SYMBOL(cfcnfg_add_phy_layer
);
555 int cfcnfg_set_phy_state(struct cfcnfg
*cnfg
, struct cflayer
*phy_layer
,
558 struct cfcnfg_phyinfo
*phyinfo
;
561 phyinfo
= cfcnfg_get_phyinfo_rcu(cnfg
, phy_layer
->id
);
562 if (phyinfo
== NULL
) {
567 if (phyinfo
->up
== up
) {
574 cffrml_hold(phyinfo
->frm_layer
);
575 cfmuxl_set_dnlayer(cnfg
->mux
, phyinfo
->frm_layer
,
578 cfmuxl_remove_dnlayer(cnfg
->mux
, phy_layer
->id
);
579 cffrml_put(phyinfo
->frm_layer
);
585 EXPORT_SYMBOL(cfcnfg_set_phy_state
);
587 int cfcnfg_del_phy_layer(struct cfcnfg
*cnfg
, struct cflayer
*phy_layer
)
589 struct cflayer
*frml
, *frml_dn
;
591 struct cfcnfg_phyinfo
*phyinfo
;
595 mutex_lock(&cnfg
->lock
);
597 phyid
= phy_layer
->id
;
598 phyinfo
= cfcnfg_get_phyinfo_rcu(cnfg
, phyid
);
600 if (phyinfo
== NULL
) {
601 mutex_unlock(&cnfg
->lock
);
604 caif_assert(phyid
== phyinfo
->id
);
605 caif_assert(phy_layer
== phyinfo
->phy_layer
);
606 caif_assert(phy_layer
->id
== phyid
);
607 caif_assert(phyinfo
->frm_layer
->id
== phyid
);
609 list_del_rcu(&phyinfo
->node
);
612 /* Fail if reference count is not zero */
613 if (cffrml_refcnt_read(phyinfo
->frm_layer
) != 0) {
614 pr_info("Wait for device inuse\n");
615 list_add_rcu(&phyinfo
->node
, &cnfg
->phys
);
616 mutex_unlock(&cnfg
->lock
);
620 frml
= phyinfo
->frm_layer
;
622 cffrml_set_uplayer(frml
, NULL
);
623 cffrml_set_dnlayer(frml
, NULL
);
624 if (phy_layer
!= frml_dn
) {
625 layer_set_up(frml_dn
, NULL
);
626 layer_set_dn(frml_dn
, NULL
);
628 layer_set_up(phy_layer
, NULL
);
630 if (phyinfo
->phy_layer
!= frml_dn
)
635 mutex_unlock(&cnfg
->lock
);
639 EXPORT_SYMBOL(cfcnfg_del_phy_layer
);