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net-caif: add CAIF core protocol stack
CAIF generic protocol implementation. This layer is somewhat generic in order to be able to use and test it outside the Linux Kernel. cfctrl.c - CAIF control protocol layer cfdbgl.c - CAIF debug protocol layer cfdgml.c - CAIF datagram protocol layer cffrml.c - CAIF framing protocol layer cfmuxl.c - CAIF mux protocol layer cfrfml.c - CAIF remote file manager protocol layer cfserl.c - CAIF serial (fragmentation) protocol layer cfsrvl.c - CAIF generic service layer functions cfutill.c - CAIF utility protocol layer cfveil.c - CAIF AT protocol layer cfvidl.c - CAIF video protocol layer Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sjur Braendeland
David S. Miller
parent
2721c5b9dd
commit
b482cd2053
11 changed files with 1981 additions and 0 deletions
664
net/caif/cfctrl.c
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664
net/caif/cfctrl.c
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@ -0,0 +1,664 @@
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/*
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* Copyright (C) ST-Ericsson AB 2010
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* Author: Sjur Brendeland/sjur.brandeland@stericsson.com
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* License terms: GNU General Public License (GPL) version 2
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*/
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#include <linux/stddef.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <net/caif/caif_layer.h>
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#include <net/caif/cfpkt.h>
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#include <net/caif/cfctrl.h>
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#define container_obj(layr) container_of(layr, struct cfctrl, serv.layer)
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#define UTILITY_NAME_LENGTH 16
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#define CFPKT_CTRL_PKT_LEN 20
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#ifdef CAIF_NO_LOOP
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static int handle_loop(struct cfctrl *ctrl,
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int cmd, struct cfpkt *pkt){
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return CAIF_FAILURE;
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}
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#else
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static int handle_loop(struct cfctrl *ctrl,
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int cmd, struct cfpkt *pkt);
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#endif
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static int cfctrl_recv(struct cflayer *layr, struct cfpkt *pkt);
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static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
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int phyid);
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struct cflayer *cfctrl_create(void)
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{
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struct cfctrl *this =
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kmalloc(sizeof(struct cfctrl), GFP_ATOMIC);
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if (!this) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return NULL;
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}
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caif_assert(offsetof(struct cfctrl, serv.layer) == 0);
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memset(this, 0, sizeof(*this));
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spin_lock_init(&this->info_list_lock);
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atomic_set(&this->req_seq_no, 1);
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atomic_set(&this->rsp_seq_no, 1);
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this->serv.dev_info.id = 0xff;
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this->serv.layer.id = 0;
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this->serv.layer.receive = cfctrl_recv;
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sprintf(this->serv.layer.name, "ctrl");
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this->serv.layer.ctrlcmd = cfctrl_ctrlcmd;
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spin_lock_init(&this->loop_linkid_lock);
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this->loop_linkid = 1;
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return &this->serv.layer;
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}
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static bool param_eq(struct cfctrl_link_param *p1, struct cfctrl_link_param *p2)
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{
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bool eq =
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p1->linktype == p2->linktype &&
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p1->priority == p2->priority &&
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p1->phyid == p2->phyid &&
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p1->endpoint == p2->endpoint && p1->chtype == p2->chtype;
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if (!eq)
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return false;
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switch (p1->linktype) {
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case CFCTRL_SRV_VEI:
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return true;
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case CFCTRL_SRV_DATAGRAM:
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return p1->u.datagram.connid == p2->u.datagram.connid;
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case CFCTRL_SRV_RFM:
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return
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p1->u.rfm.connid == p2->u.rfm.connid &&
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strcmp(p1->u.rfm.volume, p2->u.rfm.volume) == 0;
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case CFCTRL_SRV_UTIL:
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return
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p1->u.utility.fifosize_kb == p2->u.utility.fifosize_kb
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&& p1->u.utility.fifosize_bufs ==
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p2->u.utility.fifosize_bufs
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&& strcmp(p1->u.utility.name, p2->u.utility.name) == 0
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&& p1->u.utility.paramlen == p2->u.utility.paramlen
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&& memcmp(p1->u.utility.params, p2->u.utility.params,
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p1->u.utility.paramlen) == 0;
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case CFCTRL_SRV_VIDEO:
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return p1->u.video.connid == p2->u.video.connid;
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case CFCTRL_SRV_DBG:
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return true;
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case CFCTRL_SRV_DECM:
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return false;
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default:
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return false;
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}
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return false;
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}
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bool cfctrl_req_eq(struct cfctrl_request_info *r1,
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struct cfctrl_request_info *r2)
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{
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if (r1->cmd != r2->cmd)
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return false;
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if (r1->cmd == CFCTRL_CMD_LINK_SETUP)
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return param_eq(&r1->param, &r2->param);
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else
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return r1->channel_id == r2->channel_id;
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}
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/* Insert request at the end */
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void cfctrl_insert_req(struct cfctrl *ctrl,
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struct cfctrl_request_info *req)
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{
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struct cfctrl_request_info *p;
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spin_lock(&ctrl->info_list_lock);
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req->next = NULL;
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atomic_inc(&ctrl->req_seq_no);
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req->sequence_no = atomic_read(&ctrl->req_seq_no);
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if (ctrl->first_req == NULL) {
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ctrl->first_req = req;
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spin_unlock(&ctrl->info_list_lock);
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return;
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}
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p = ctrl->first_req;
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while (p->next != NULL)
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p = p->next;
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p->next = req;
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spin_unlock(&ctrl->info_list_lock);
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}
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static void cfctrl_insert_req2(struct cfctrl *ctrl, enum cfctrl_cmd cmd,
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u8 linkid, struct cflayer *user_layer)
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{
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struct cfctrl_request_info *req = kmalloc(sizeof(*req), GFP_KERNEL);
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if (!req) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return;
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}
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req->client_layer = user_layer;
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req->cmd = cmd;
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req->channel_id = linkid;
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cfctrl_insert_req(ctrl, req);
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}
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/* Compare and remove request */
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struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl,
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struct cfctrl_request_info *req)
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{
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struct cfctrl_request_info *p;
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struct cfctrl_request_info *ret;
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spin_lock(&ctrl->info_list_lock);
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if (ctrl->first_req == NULL) {
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spin_unlock(&ctrl->info_list_lock);
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return NULL;
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}
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if (cfctrl_req_eq(req, ctrl->first_req)) {
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ret = ctrl->first_req;
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caif_assert(ctrl->first_req);
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atomic_set(&ctrl->rsp_seq_no,
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ctrl->first_req->sequence_no);
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ctrl->first_req = ctrl->first_req->next;
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spin_unlock(&ctrl->info_list_lock);
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return ret;
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}
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p = ctrl->first_req;
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while (p->next != NULL) {
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if (cfctrl_req_eq(req, p->next)) {
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pr_warning("CAIF: %s(): Requests are not "
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"received in order\n",
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__func__);
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ret = p->next;
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atomic_set(&ctrl->rsp_seq_no,
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p->next->sequence_no);
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p->next = p->next->next;
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spin_unlock(&ctrl->info_list_lock);
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return ret;
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}
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p = p->next;
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}
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spin_unlock(&ctrl->info_list_lock);
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pr_warning("CAIF: %s(): Request does not match\n",
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__func__);
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return NULL;
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}
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struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer)
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{
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struct cfctrl *this = container_obj(layer);
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return &this->res;
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}
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void cfctrl_set_dnlayer(struct cflayer *this, struct cflayer *dn)
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{
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this->dn = dn;
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}
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void cfctrl_set_uplayer(struct cflayer *this, struct cflayer *up)
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{
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this->up = up;
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}
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static void init_info(struct caif_payload_info *info, struct cfctrl *cfctrl)
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{
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info->hdr_len = 0;
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info->channel_id = cfctrl->serv.layer.id;
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info->dev_info = &cfctrl->serv.dev_info;
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}
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void cfctrl_enum_req(struct cflayer *layer, u8 physlinkid)
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{
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struct cfctrl *cfctrl = container_obj(layer);
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int ret;
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struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
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if (!pkt) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return;
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}
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caif_assert(offsetof(struct cfctrl, serv.layer) == 0);
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init_info(cfpkt_info(pkt), cfctrl);
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cfpkt_info(pkt)->dev_info->id = physlinkid;
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cfctrl->serv.dev_info.id = physlinkid;
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cfpkt_addbdy(pkt, CFCTRL_CMD_ENUM);
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cfpkt_addbdy(pkt, physlinkid);
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ret =
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cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
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if (ret < 0) {
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pr_err("CAIF: %s(): Could not transmit enum message\n",
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__func__);
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cfpkt_destroy(pkt);
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}
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}
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void cfctrl_linkup_request(struct cflayer *layer,
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struct cfctrl_link_param *param,
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struct cflayer *user_layer)
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{
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struct cfctrl *cfctrl = container_obj(layer);
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u32 tmp32;
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u16 tmp16;
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u8 tmp8;
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struct cfctrl_request_info *req;
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int ret;
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char utility_name[16];
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struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
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if (!pkt) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return;
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}
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cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_SETUP);
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cfpkt_addbdy(pkt, (param->chtype << 4) + param->linktype);
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cfpkt_addbdy(pkt, (param->priority << 3) + param->phyid);
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cfpkt_addbdy(pkt, param->endpoint & 0x03);
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switch (param->linktype) {
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case CFCTRL_SRV_VEI:
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break;
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case CFCTRL_SRV_VIDEO:
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cfpkt_addbdy(pkt, (u8) param->u.video.connid);
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break;
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case CFCTRL_SRV_DBG:
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break;
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case CFCTRL_SRV_DATAGRAM:
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tmp32 = cpu_to_le32(param->u.datagram.connid);
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cfpkt_add_body(pkt, &tmp32, 4);
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break;
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case CFCTRL_SRV_RFM:
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/* Construct a frame, convert DatagramConnectionID to network
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* format long and copy it out...
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*/
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tmp32 = cpu_to_le32(param->u.rfm.connid);
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cfpkt_add_body(pkt, &tmp32, 4);
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/* Add volume name, including zero termination... */
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cfpkt_add_body(pkt, param->u.rfm.volume,
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strlen(param->u.rfm.volume) + 1);
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break;
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case CFCTRL_SRV_UTIL:
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tmp16 = cpu_to_le16(param->u.utility.fifosize_kb);
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cfpkt_add_body(pkt, &tmp16, 2);
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tmp16 = cpu_to_le16(param->u.utility.fifosize_bufs);
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cfpkt_add_body(pkt, &tmp16, 2);
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memset(utility_name, 0, sizeof(utility_name));
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strncpy(utility_name, param->u.utility.name,
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UTILITY_NAME_LENGTH - 1);
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cfpkt_add_body(pkt, utility_name, UTILITY_NAME_LENGTH);
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tmp8 = param->u.utility.paramlen;
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cfpkt_add_body(pkt, &tmp8, 1);
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cfpkt_add_body(pkt, param->u.utility.params,
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param->u.utility.paramlen);
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break;
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default:
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pr_warning("CAIF: %s():Request setup of bad link type = %d\n",
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__func__, param->linktype);
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}
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req = kmalloc(sizeof(*req), GFP_KERNEL);
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if (!req) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return;
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}
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memset(req, 0, sizeof(*req));
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req->client_layer = user_layer;
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req->cmd = CFCTRL_CMD_LINK_SETUP;
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req->param = *param;
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cfctrl_insert_req(cfctrl, req);
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init_info(cfpkt_info(pkt), cfctrl);
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cfpkt_info(pkt)->dev_info->id = param->phyid;
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ret =
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cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
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if (ret < 0) {
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pr_err("CAIF: %s(): Could not transmit linksetup request\n",
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__func__);
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cfpkt_destroy(pkt);
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}
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}
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int cfctrl_linkdown_req(struct cflayer *layer, u8 channelid,
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struct cflayer *client)
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{
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int ret;
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struct cfctrl *cfctrl = container_obj(layer);
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struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
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if (!pkt) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return -ENOMEM;
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}
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cfctrl_insert_req2(cfctrl, CFCTRL_CMD_LINK_DESTROY, channelid, client);
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cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY);
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cfpkt_addbdy(pkt, channelid);
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init_info(cfpkt_info(pkt), cfctrl);
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ret =
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cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
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if (ret < 0) {
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pr_err("CAIF: %s(): Could not transmit link-down request\n",
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__func__);
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cfpkt_destroy(pkt);
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}
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return ret;
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}
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void cfctrl_sleep_req(struct cflayer *layer)
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{
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int ret;
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struct cfctrl *cfctrl = container_obj(layer);
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struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
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if (!pkt) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return;
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}
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cfpkt_addbdy(pkt, CFCTRL_CMD_SLEEP);
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init_info(cfpkt_info(pkt), cfctrl);
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ret =
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cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
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if (ret < 0)
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cfpkt_destroy(pkt);
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}
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void cfctrl_wake_req(struct cflayer *layer)
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{
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int ret;
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struct cfctrl *cfctrl = container_obj(layer);
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struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
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if (!pkt) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return;
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}
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cfpkt_addbdy(pkt, CFCTRL_CMD_WAKE);
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init_info(cfpkt_info(pkt), cfctrl);
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ret =
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cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
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if (ret < 0)
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cfpkt_destroy(pkt);
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}
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void cfctrl_getstartreason_req(struct cflayer *layer)
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{
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int ret;
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struct cfctrl *cfctrl = container_obj(layer);
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struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
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if (!pkt) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return;
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}
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cfpkt_addbdy(pkt, CFCTRL_CMD_START_REASON);
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init_info(cfpkt_info(pkt), cfctrl);
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ret =
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cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
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if (ret < 0)
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cfpkt_destroy(pkt);
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}
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static int cfctrl_recv(struct cflayer *layer, struct cfpkt *pkt)
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{
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u8 cmdrsp;
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u8 cmd;
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int ret = -1;
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u16 tmp16;
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u8 len;
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u8 param[255];
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u8 linkid;
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struct cfctrl *cfctrl = container_obj(layer);
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struct cfctrl_request_info rsp, *req;
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cfpkt_extr_head(pkt, &cmdrsp, 1);
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cmd = cmdrsp & CFCTRL_CMD_MASK;
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if (cmd != CFCTRL_CMD_LINK_ERR
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&& CFCTRL_RSP_BIT != (CFCTRL_RSP_BIT & cmdrsp)) {
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if (handle_loop(cfctrl, cmd, pkt) == CAIF_FAILURE) {
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pr_info("CAIF: %s() CAIF Protocol error:"
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"Response bit not set\n", __func__);
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goto error;
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}
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}
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switch (cmd) {
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case CFCTRL_CMD_LINK_SETUP:
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{
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enum cfctrl_srv serv;
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enum cfctrl_srv servtype;
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u8 endpoint;
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u8 physlinkid;
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u8 prio;
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u8 tmp;
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u32 tmp32;
|
||||
u8 *cp;
|
||||
int i;
|
||||
struct cfctrl_link_param linkparam;
|
||||
memset(&linkparam, 0, sizeof(linkparam));
|
||||
|
||||
cfpkt_extr_head(pkt, &tmp, 1);
|
||||
|
||||
serv = tmp & CFCTRL_SRV_MASK;
|
||||
linkparam.linktype = serv;
|
||||
|
||||
servtype = tmp >> 4;
|
||||
linkparam.chtype = servtype;
|
||||
|
||||
cfpkt_extr_head(pkt, &tmp, 1);
|
||||
physlinkid = tmp & 0x07;
|
||||
prio = tmp >> 3;
|
||||
|
||||
linkparam.priority = prio;
|
||||
linkparam.phyid = physlinkid;
|
||||
cfpkt_extr_head(pkt, &endpoint, 1);
|
||||
linkparam.endpoint = endpoint & 0x03;
|
||||
|
||||
switch (serv) {
|
||||
case CFCTRL_SRV_VEI:
|
||||
case CFCTRL_SRV_DBG:
|
||||
/* Link ID */
|
||||
cfpkt_extr_head(pkt, &linkid, 1);
|
||||
break;
|
||||
case CFCTRL_SRV_VIDEO:
|
||||
cfpkt_extr_head(pkt, &tmp, 1);
|
||||
linkparam.u.video.connid = tmp;
|
||||
/* Link ID */
|
||||
cfpkt_extr_head(pkt, &linkid, 1);
|
||||
break;
|
||||
|
||||
case CFCTRL_SRV_DATAGRAM:
|
||||
cfpkt_extr_head(pkt, &tmp32, 4);
|
||||
linkparam.u.datagram.connid =
|
||||
le32_to_cpu(tmp32);
|
||||
/* Link ID */
|
||||
cfpkt_extr_head(pkt, &linkid, 1);
|
||||
break;
|
||||
case CFCTRL_SRV_RFM:
|
||||
/* Construct a frame, convert
|
||||
* DatagramConnectionID
|
||||
* to network format long and copy it out...
|
||||
*/
|
||||
cfpkt_extr_head(pkt, &tmp32, 4);
|
||||
linkparam.u.rfm.connid =
|
||||
le32_to_cpu(tmp32);
|
||||
cp = (u8 *) linkparam.u.rfm.volume;
|
||||
for (cfpkt_extr_head(pkt, &tmp, 1);
|
||||
cfpkt_more(pkt) && tmp != '\0';
|
||||
cfpkt_extr_head(pkt, &tmp, 1))
|
||||
*cp++ = tmp;
|
||||
*cp = '\0';
|
||||
|
||||
/* Link ID */
|
||||
cfpkt_extr_head(pkt, &linkid, 1);
|
||||
|
||||
break;
|
||||
case CFCTRL_SRV_UTIL:
|
||||
/* Construct a frame, convert
|
||||
* DatagramConnectionID
|
||||
* to network format long and copy it out...
|
||||
*/
|
||||
/* Fifosize KB */
|
||||
cfpkt_extr_head(pkt, &tmp16, 2);
|
||||
linkparam.u.utility.fifosize_kb =
|
||||
le16_to_cpu(tmp16);
|
||||
/* Fifosize bufs */
|
||||
cfpkt_extr_head(pkt, &tmp16, 2);
|
||||
linkparam.u.utility.fifosize_bufs =
|
||||
le16_to_cpu(tmp16);
|
||||
/* name */
|
||||
cp = (u8 *) linkparam.u.utility.name;
|
||||
caif_assert(sizeof(linkparam.u.utility.name)
|
||||
>= UTILITY_NAME_LENGTH);
|
||||
for (i = 0;
|
||||
i < UTILITY_NAME_LENGTH
|
||||
&& cfpkt_more(pkt); i++) {
|
||||
cfpkt_extr_head(pkt, &tmp, 1);
|
||||
*cp++ = tmp;
|
||||
}
|
||||
/* Length */
|
||||
cfpkt_extr_head(pkt, &len, 1);
|
||||
linkparam.u.utility.paramlen = len;
|
||||
/* Param Data */
|
||||
cp = linkparam.u.utility.params;
|
||||
while (cfpkt_more(pkt) && len--) {
|
||||
cfpkt_extr_head(pkt, &tmp, 1);
|
||||
*cp++ = tmp;
|
||||
}
|
||||
/* Link ID */
|
||||
cfpkt_extr_head(pkt, &linkid, 1);
|
||||
/* Length */
|
||||
cfpkt_extr_head(pkt, &len, 1);
|
||||
/* Param Data */
|
||||
cfpkt_extr_head(pkt, ¶m, len);
|
||||
break;
|
||||
default:
|
||||
pr_warning("CAIF: %s(): Request setup "
|
||||
"- invalid link type (%d)",
|
||||
__func__, serv);
|
||||
goto error;
|
||||
}
|
||||
|
||||
rsp.cmd = cmd;
|
||||
rsp.param = linkparam;
|
||||
req = cfctrl_remove_req(cfctrl, &rsp);
|
||||
|
||||
if (CFCTRL_ERR_BIT == (CFCTRL_ERR_BIT & cmdrsp) ||
|
||||
cfpkt_erroneous(pkt)) {
|
||||
pr_err("CAIF: %s(): Invalid O/E bit or parse "
|
||||
"error on CAIF control channel",
|
||||
__func__);
|
||||
cfctrl->res.reject_rsp(cfctrl->serv.layer.up,
|
||||
0,
|
||||
req ? req->client_layer
|
||||
: NULL);
|
||||
} else {
|
||||
cfctrl->res.linksetup_rsp(cfctrl->serv.
|
||||
layer.up, linkid,
|
||||
serv, physlinkid,
|
||||
req ? req->
|
||||
client_layer : NULL);
|
||||
}
|
||||
|
||||
if (req != NULL)
|
||||
kfree(req);
|
||||
}
|
||||
break;
|
||||
case CFCTRL_CMD_LINK_DESTROY:
|
||||
cfpkt_extr_head(pkt, &linkid, 1);
|
||||
rsp.cmd = cmd;
|
||||
rsp.channel_id = linkid;
|
||||
req = cfctrl_remove_req(cfctrl, &rsp);
|
||||
cfctrl->res.linkdestroy_rsp(cfctrl->serv.layer.up, linkid,
|
||||
req ? req->client_layer : NULL);
|
||||
if (req != NULL)
|
||||
kfree(req);
|
||||
break;
|
||||
case CFCTRL_CMD_LINK_ERR:
|
||||
pr_err("CAIF: %s(): Frame Error Indication received\n",
|
||||
__func__);
|
||||
cfctrl->res.linkerror_ind();
|
||||
break;
|
||||
case CFCTRL_CMD_ENUM:
|
||||
cfctrl->res.enum_rsp();
|
||||
break;
|
||||
case CFCTRL_CMD_SLEEP:
|
||||
cfctrl->res.sleep_rsp();
|
||||
break;
|
||||
case CFCTRL_CMD_WAKE:
|
||||
cfctrl->res.wake_rsp();
|
||||
break;
|
||||
case CFCTRL_CMD_LINK_RECONF:
|
||||
cfctrl->res.restart_rsp();
|
||||
break;
|
||||
case CFCTRL_CMD_RADIO_SET:
|
||||
cfctrl->res.radioset_rsp();
|
||||
break;
|
||||
default:
|
||||
pr_err("CAIF: %s(): Unrecognized Control Frame\n", __func__);
|
||||
goto error;
|
||||
break;
|
||||
}
|
||||
ret = 0;
|
||||
error:
|
||||
cfpkt_destroy(pkt);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
|
||||
int phyid)
|
||||
{
|
||||
struct cfctrl *this = container_obj(layr);
|
||||
switch (ctrl) {
|
||||
case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND:
|
||||
case CAIF_CTRLCMD_FLOW_OFF_IND:
|
||||
spin_lock(&this->info_list_lock);
|
||||
if (this->first_req != NULL) {
|
||||
pr_warning("CAIF: %s(): Received flow off in "
|
||||
"control layer", __func__);
|
||||
}
|
||||
spin_unlock(&this->info_list_lock);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
#ifndef CAIF_NO_LOOP
|
||||
static int handle_loop(struct cfctrl *ctrl, int cmd, struct cfpkt *pkt)
|
||||
{
|
||||
static int last_linkid;
|
||||
u8 linkid, linktype, tmp;
|
||||
switch (cmd) {
|
||||
case CFCTRL_CMD_LINK_SETUP:
|
||||
spin_lock(&ctrl->loop_linkid_lock);
|
||||
for (linkid = last_linkid + 1; linkid < 255; linkid++)
|
||||
if (!ctrl->loop_linkused[linkid])
|
||||
goto found;
|
||||
for (linkid = last_linkid - 1; linkid > 0; linkid--)
|
||||
if (!ctrl->loop_linkused[linkid])
|
||||
goto found;
|
||||
spin_unlock(&ctrl->loop_linkid_lock);
|
||||
return -EINVAL;
|
||||
found:
|
||||
if (!ctrl->loop_linkused[linkid])
|
||||
ctrl->loop_linkused[linkid] = 1;
|
||||
|
||||
last_linkid = linkid;
|
||||
|
||||
cfpkt_add_trail(pkt, &linkid, 1);
|
||||
spin_unlock(&ctrl->loop_linkid_lock);
|
||||
cfpkt_peek_head(pkt, &linktype, 1);
|
||||
if (linktype == CFCTRL_SRV_UTIL) {
|
||||
tmp = 0x01;
|
||||
cfpkt_add_trail(pkt, &tmp, 1);
|
||||
cfpkt_add_trail(pkt, &tmp, 1);
|
||||
}
|
||||
break;
|
||||
|
||||
case CFCTRL_CMD_LINK_DESTROY:
|
||||
spin_lock(&ctrl->loop_linkid_lock);
|
||||
cfpkt_peek_head(pkt, &linkid, 1);
|
||||
ctrl->loop_linkused[linkid] = 0;
|
||||
spin_unlock(&ctrl->loop_linkid_lock);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return CAIF_SUCCESS;
|
||||
}
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue