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Release 4.14 net/caif/cfutill.c

Directory: net/caif
 * Copyright (C) ST-Ericsson AB 2010
 * Author:      Sjur Brendeland
 * License terms: GNU General Public License (GPL) version 2

#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <net/caif/caif_layer.h>
#include <net/caif/cfsrvl.h>
#include <net/caif/cfpkt.h>

#define container_obj(layr) ((struct cfsrvl *) layr)

#define UTIL_PAYLOAD  0x00

#define UTIL_CMD_BIT  0x80


#define UTIL_FLOW_OFF 0x81

#define UTIL_FLOW_ON  0x80

static int cfutill_receive(struct cflayer *layr, struct cfpkt *pkt);
static int cfutill_transmit(struct cflayer *layr, struct cfpkt *pkt);

struct cflayer *cfutill_create(u8 channel_id, struct dev_info *dev_info) { struct cfsrvl *util = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC); if (!util) return NULL; caif_assert(offsetof(struct cfsrvl, layer) == 0); cfsrvl_init(util, channel_id, dev_info, true); util->layer.receive = cfutill_receive; util->layer.transmit = cfutill_transmit; snprintf(util->, CAIF_LAYER_NAME_SZ - 1, "util1"); return &util->layer; }


Sjur Brændeland9999.00%266.67%
Joe Perches11.00%133.33%

static int cfutill_receive(struct cflayer *layr, struct cfpkt *pkt) { u8 cmd = -1; struct cfsrvl *service = container_obj(layr); caif_assert(layr != NULL); caif_assert(layr->up != NULL); caif_assert(layr->up->receive != NULL); caif_assert(layr->up->ctrlcmd != NULL); if (cfpkt_extr_head(pkt, &cmd, 1) < 0) { pr_err("Packet is erroneous!\n"); cfpkt_destroy(pkt); return -EPROTO; } switch (cmd) { case UTIL_PAYLOAD: return layr->up->receive(layr->up, pkt); case UTIL_FLOW_OFF: layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0); cfpkt_destroy(pkt); return 0; case UTIL_FLOW_ON: layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0); cfpkt_destroy(pkt); return 0; case UTIL_REMOTE_SHUTDOWN: /* Remote Shutdown Request */ pr_err("REMOTE SHUTDOWN REQUEST RECEIVED\n"); layr->ctrlcmd(layr, CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, 0); service->open = false; cfpkt_destroy(pkt); return 0; default: cfpkt_destroy(pkt); pr_warn("Unknown service control %d (0x%x)\n", cmd, cmd); return -EPROTO; } }


Sjur Brændeland21698.18%150.00%
Joe Perches41.82%150.00%

static int cfutill_transmit(struct cflayer *layr, struct cfpkt *pkt) { u8 zero = 0; struct caif_payload_info *info; int ret; struct cfsrvl *service = container_obj(layr); caif_assert(layr != NULL); caif_assert(layr->dn != NULL); caif_assert(layr->dn->transmit != NULL); if (!cfsrvl_ready(service, &ret)) { cfpkt_destroy(pkt); return ret; } cfpkt_add_head(pkt, &zero, 1); /* Add info for MUX-layer to route the packet out. */ info = cfpkt_info(pkt); info->channel_id = service->; /* * To optimize alignment, we add up the size of CAIF header before * payload. */ info->hdr_len = 1; info->dev_info = &service->dev_info; return layr->dn->transmit(layr->dn, pkt); }


Sjur Brændeland13895.17%266.67%
Dmitry Tarnyagin74.83%133.33%

Overall Contributors

Sjur Brændeland53296.55%457.14%
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Directory: net/caif
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