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 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 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 cfcnfg_disconn_adapt_layer(struct cfcnfg
*cfg
, struct cflayer
*adap_layer
)
188 struct cflayer
*servl
= NULL
;
190 caif_assert(adap_layer
!= NULL
);
192 channel_id
= adap_layer
->id
;
193 if (adap_layer
->dn
== NULL
|| channel_id
== 0) {
194 pr_err("adap_layer->dn == NULL or adap_layer->id is 0\n");
199 servl
= cfmuxl_remove_uplayer(cfg
->mux
, channel_id
);
201 pr_err("PROTOCOL ERROR - "
202 "Error removing service_layer Channel_Id(%d)",
208 ret
= cfctrl_linkdown_req(cfg
->ctrl
, channel_id
, adap_layer
);
211 cfctrl_cancel_req(cfg
->ctrl
, adap_layer
);
213 /* Do RCU sync before initiating cleanup */
215 if (adap_layer
->ctrlcmd
!= NULL
)
216 adap_layer
->ctrlcmd(adap_layer
, CAIF_CTRLCMD_DEINIT_RSP
, 0);
220 EXPORT_SYMBOL(cfcnfg_disconn_adapt_layer
);
222 void cfcnfg_release_adap_layer(struct cflayer
*adap_layer
)
225 cfsrvl_put(adap_layer
->dn
);
227 EXPORT_SYMBOL(cfcnfg_release_adap_layer
);
229 static void cfcnfg_linkdestroy_rsp(struct cflayer
*layer
, u8 channel_id
)
233 static const int protohead
[CFCTRL_SRV_MASK
] = {
234 [CFCTRL_SRV_VEI
] = 4,
235 [CFCTRL_SRV_DATAGRAM
] = 7,
236 [CFCTRL_SRV_UTIL
] = 4,
237 [CFCTRL_SRV_RFM
] = 3,
238 [CFCTRL_SRV_DBG
] = 3,
241 int cfcnfg_add_adaptation_layer(struct cfcnfg
*cnfg
,
242 struct cfctrl_link_param
*param
,
243 struct cflayer
*adap_layer
,
248 struct cflayer
*frml
;
249 struct cfcnfg_phyinfo
*phy
;
253 phy
= cfcnfg_get_phyinfo_rcu(cnfg
, param
->phyid
);
260 if (adap_layer
== NULL
) {
261 pr_err("adap_layer is zero\n");
264 if (adap_layer
->receive
== NULL
) {
265 pr_err("adap_layer->receive is NULL\n");
268 if (adap_layer
->ctrlcmd
== NULL
) {
269 pr_err("adap_layer->ctrlcmd == NULL\n");
274 frml
= phy
->frm_layer
;
276 pr_err("Specified PHY type does not exist!\n");
279 caif_assert(param
->phyid
== phy
->id
);
280 caif_assert(phy
->frm_layer
->id
==
282 caif_assert(phy
->phy_layer
->id
==
285 *ifindex
= phy
->ifindex
;
288 protohead
[param
->linktype
] + (phy
->use_stx
? 1 : 0);
292 /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */
293 cfctrl_enum_req(cnfg
->ctrl
, param
->phyid
);
294 return cfctrl_linkup_request(cnfg
->ctrl
, param
, adap_layer
);
300 EXPORT_SYMBOL(cfcnfg_add_adaptation_layer
);
302 static void cfcnfg_reject_rsp(struct cflayer
*layer
, u8 channel_id
,
303 struct cflayer
*adapt_layer
)
305 if (adapt_layer
!= NULL
&& adapt_layer
->ctrlcmd
!= NULL
)
306 adapt_layer
->ctrlcmd(adapt_layer
,
307 CAIF_CTRLCMD_INIT_FAIL_RSP
, 0);
311 cfcnfg_linkup_rsp(struct cflayer
*layer
, u8 channel_id
, enum cfctrl_srv serv
,
312 u8 phyid
, struct cflayer
*adapt_layer
)
314 struct cfcnfg
*cnfg
= container_obj(layer
);
315 struct cflayer
*servicel
= NULL
;
316 struct cfcnfg_phyinfo
*phyinfo
;
317 struct net_device
*netdev
;
321 if (adapt_layer
== NULL
) {
322 pr_debug("link setup response but no client exist,"
323 "send linkdown back\n");
324 cfctrl_linkdown_req(cnfg
->ctrl
, channel_id
, NULL
);
328 caif_assert(cnfg
!= NULL
);
329 caif_assert(phyid
!= 0);
331 phyinfo
= cfcnfg_get_phyinfo_rcu(cnfg
, phyid
);
332 if (phyinfo
== NULL
) {
333 pr_err("ERROR: Link Layer Device dissapeared"
334 "while connecting\n");
338 caif_assert(phyinfo
!= NULL
);
339 caif_assert(phyinfo
->id
== phyid
);
340 caif_assert(phyinfo
->phy_layer
!= NULL
);
341 caif_assert(phyinfo
->phy_layer
->id
== phyid
);
343 adapt_layer
->id
= channel_id
;
347 servicel
= cfvei_create(channel_id
, &phyinfo
->dev_info
);
349 case CFCTRL_SRV_DATAGRAM
:
350 servicel
= cfdgml_create(channel_id
,
354 netdev
= phyinfo
->dev_info
.dev
;
355 servicel
= cfrfml_create(channel_id
, &phyinfo
->dev_info
,
358 case CFCTRL_SRV_UTIL
:
359 servicel
= cfutill_create(channel_id
, &phyinfo
->dev_info
);
361 case CFCTRL_SRV_VIDEO
:
362 servicel
= cfvidl_create(channel_id
, &phyinfo
->dev_info
);
365 servicel
= cfdbgl_create(channel_id
, &phyinfo
->dev_info
);
368 pr_err("Protocol error. Link setup response "
369 "- unknown channel type\n");
373 pr_warn("Out of memory\n");
376 layer_set_dn(servicel
, cnfg
->mux
);
377 cfmuxl_set_uplayer(cnfg
->mux
, servicel
, channel_id
);
378 layer_set_up(servicel
, adapt_layer
);
379 layer_set_dn(adapt_layer
, servicel
);
383 servicel
->ctrlcmd(servicel
, CAIF_CTRLCMD_INIT_RSP
, 0);
390 cfcnfg_add_phy_layer(struct cfcnfg
*cnfg
, enum cfcnfg_phy_type phy_type
,
391 struct net_device
*dev
, struct cflayer
*phy_layer
,
392 u16
*phy_id
, enum cfcnfg_phy_preference pref
,
395 struct cflayer
*frml
;
396 struct cflayer
*phy_driver
= NULL
;
397 struct cfcnfg_phyinfo
*phyinfo
;
401 mutex_lock(&cnfg
->lock
);
403 /* CAIF protocol allow maximum 6 link-layers */
404 for (i
= 0; i
< 7; i
++) {
405 phyid
= (dev
->ifindex
+ i
) & 0x7;
408 if (cfcnfg_get_phyinfo_rcu(cnfg
, phyid
) == NULL
)
411 pr_warn("Too many CAIF Link Layers (max 6)\n");
415 phyinfo
= kzalloc(sizeof(struct cfcnfg_phyinfo
), GFP_ATOMIC
);
420 cfserl_create(CFPHYTYPE_FRAG
, phyid
, stx
);
422 pr_warn("Out of memory\n");
432 phy_layer
->id
= phyid
;
433 phyinfo
->pref
= pref
;
435 phyinfo
->dev_info
.id
= phyid
;
436 phyinfo
->dev_info
.dev
= dev
;
437 phyinfo
->phy_layer
= phy_layer
;
438 phyinfo
->ifindex
= dev
->ifindex
;
439 phyinfo
->use_stx
= stx
;
440 phyinfo
->use_fcs
= fcs
;
442 phy_layer
->type
= phy_type
;
443 frml
= cffrml_create(phyid
, fcs
);
446 pr_warn("Out of memory\n");
450 phyinfo
->frm_layer
= frml
;
451 layer_set_up(frml
, cnfg
->mux
);
453 if (phy_driver
!= NULL
) {
454 phy_driver
->id
= phyid
;
455 layer_set_dn(frml
, phy_driver
);
456 layer_set_up(phy_driver
, frml
);
457 layer_set_dn(phy_driver
, phy_layer
);
458 layer_set_up(phy_layer
, phy_driver
);
460 layer_set_dn(frml
, phy_layer
);
461 layer_set_up(phy_layer
, frml
);
464 list_add_rcu(&phyinfo
->node
, &cnfg
->phys
);
466 mutex_unlock(&cnfg
->lock
);
468 EXPORT_SYMBOL(cfcnfg_add_phy_layer
);
470 int cfcnfg_set_phy_state(struct cfcnfg
*cnfg
, struct cflayer
*phy_layer
,
473 struct cfcnfg_phyinfo
*phyinfo
;
476 phyinfo
= cfcnfg_get_phyinfo_rcu(cnfg
, phy_layer
->id
);
477 if (phyinfo
== NULL
) {
482 if (phyinfo
->up
== up
) {
489 cffrml_hold(phyinfo
->frm_layer
);
490 cfmuxl_set_dnlayer(cnfg
->mux
, phyinfo
->frm_layer
,
493 cfmuxl_remove_dnlayer(cnfg
->mux
, phy_layer
->id
);
494 cffrml_put(phyinfo
->frm_layer
);
500 EXPORT_SYMBOL(cfcnfg_set_phy_state
);
502 int cfcnfg_del_phy_layer(struct cfcnfg
*cnfg
, struct cflayer
*phy_layer
)
504 struct cflayer
*frml
, *frml_dn
;
506 struct cfcnfg_phyinfo
*phyinfo
;
510 mutex_lock(&cnfg
->lock
);
512 phyid
= phy_layer
->id
;
513 phyinfo
= cfcnfg_get_phyinfo_rcu(cnfg
, phyid
);
517 caif_assert(phyid
== phyinfo
->id
);
518 caif_assert(phy_layer
== phyinfo
->phy_layer
);
519 caif_assert(phy_layer
->id
== phyid
);
520 caif_assert(phyinfo
->frm_layer
->id
== phyid
);
522 list_del_rcu(&phyinfo
->node
);
525 frml
= phyinfo
->frm_layer
;
527 cffrml_set_uplayer(frml
, NULL
);
528 cffrml_set_dnlayer(frml
, NULL
);
529 if (phy_layer
!= frml_dn
) {
530 layer_set_up(frml_dn
, NULL
);
531 layer_set_dn(frml_dn
, NULL
);
533 layer_set_up(phy_layer
, NULL
);
537 if (phyinfo
->phy_layer
!= frml_dn
)
542 mutex_unlock(&cnfg
->lock
);
546 EXPORT_SYMBOL(cfcnfg_del_phy_layer
);