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v3.15
  1/*
  2 * Copyright (C) ST-Ericsson AB 2010
  3 * Author:	Sjur Brendeland
  4 * License terms: GNU General Public License (GPL) version 2
  5 */
  6
  7#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
  8
  9#include <linux/stddef.h>
 10#include <linux/spinlock.h>
 11#include <linux/slab.h>
 12#include <net/caif/caif_layer.h>
 13#include <net/caif/cfsrvl.h>
 14#include <net/caif/cfpkt.h>
 15
 16
 17#define container_obj(layr) ((struct cfsrvl *) layr)
 18
 19#define DGM_CMD_BIT  0x80
 20#define DGM_FLOW_OFF 0x81
 21#define DGM_FLOW_ON  0x80
 22#define DGM_MTU 1500
 23
 24static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt);
 25static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt);
 26
 27struct cflayer *cfdgml_create(u8 channel_id, struct dev_info *dev_info)
 28{
 29	struct cfsrvl *dgm = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
 30	if (!dgm)
 31		return NULL;
 32	caif_assert(offsetof(struct cfsrvl, layer) == 0);
 33	cfsrvl_init(dgm, channel_id, dev_info, true);
 34	dgm->layer.receive = cfdgml_receive;
 35	dgm->layer.transmit = cfdgml_transmit;
 36	snprintf(dgm->layer.name, CAIF_LAYER_NAME_SZ - 1, "dgm%d", channel_id);
 37	dgm->layer.name[CAIF_LAYER_NAME_SZ - 1] = '\0';
 38	return &dgm->layer;
 39}
 40
 41static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt)
 42{
 43	u8 cmd = -1;
 44	u8 dgmhdr[3];
 45	int ret;
 46	caif_assert(layr->up != NULL);
 47	caif_assert(layr->receive != NULL);
 48	caif_assert(layr->ctrlcmd != NULL);
 49
 50	if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
 51		pr_err("Packet is erroneous!\n");
 52		cfpkt_destroy(pkt);
 53		return -EPROTO;
 54	}
 55
 56	if ((cmd & DGM_CMD_BIT) == 0) {
 57		if (cfpkt_extr_head(pkt, &dgmhdr, 3) < 0) {
 58			pr_err("Packet is erroneous!\n");
 59			cfpkt_destroy(pkt);
 60			return -EPROTO;
 61		}
 62		ret = layr->up->receive(layr->up, pkt);
 63		return ret;
 64	}
 65
 66	switch (cmd) {
 67	case DGM_FLOW_OFF:	/* FLOW OFF */
 68		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
 69		cfpkt_destroy(pkt);
 70		return 0;
 71	case DGM_FLOW_ON:	/* FLOW ON */
 72		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
 73		cfpkt_destroy(pkt);
 74		return 0;
 75	default:
 76		cfpkt_destroy(pkt);
 77		pr_info("Unknown datagram control %d (0x%x)\n", cmd, cmd);
 78		return -EPROTO;
 79	}
 80}
 81
 82static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt)
 83{
 84	u8 packet_type;
 85	u32 zero = 0;
 86	struct caif_payload_info *info;
 87	struct cfsrvl *service = container_obj(layr);
 88	int ret;
 89
 90	if (!cfsrvl_ready(service, &ret)) {
 91		cfpkt_destroy(pkt);
 92		return ret;
 93	}
 94
 95	/* STE Modem cannot handle more than 1500 bytes datagrams */
 96	if (cfpkt_getlen(pkt) > DGM_MTU) {
 97		cfpkt_destroy(pkt);
 98		return -EMSGSIZE;
 99	}
100
101	cfpkt_add_head(pkt, &zero, 3);
102	packet_type = 0x08; /* B9 set - UNCLASSIFIED */
103	cfpkt_add_head(pkt, &packet_type, 1);
104
105	/* Add info for MUX-layer to route the packet out. */
106	info = cfpkt_info(pkt);
107	info->channel_id = service->layer.id;
108	/* To optimize alignment, we add up the size of CAIF header
109	 * before payload.
110	 */
111	info->hdr_len = 4;
112	info->dev_info = &service->dev_info;
113	return layr->dn->transmit(layr->dn, pkt);
114}
v4.17
  1/*
  2 * Copyright (C) ST-Ericsson AB 2010
  3 * Author:	Sjur Brendeland
  4 * License terms: GNU General Public License (GPL) version 2
  5 */
  6
  7#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
  8
  9#include <linux/stddef.h>
 10#include <linux/spinlock.h>
 11#include <linux/slab.h>
 12#include <net/caif/caif_layer.h>
 13#include <net/caif/cfsrvl.h>
 14#include <net/caif/cfpkt.h>
 15
 16
 17#define container_obj(layr) ((struct cfsrvl *) layr)
 18
 19#define DGM_CMD_BIT  0x80
 20#define DGM_FLOW_OFF 0x81
 21#define DGM_FLOW_ON  0x80
 22#define DGM_MTU 1500
 23
 24static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt);
 25static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt);
 26
 27struct cflayer *cfdgml_create(u8 channel_id, struct dev_info *dev_info)
 28{
 29	struct cfsrvl *dgm = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
 30	if (!dgm)
 31		return NULL;
 32	caif_assert(offsetof(struct cfsrvl, layer) == 0);
 33	cfsrvl_init(dgm, channel_id, dev_info, true);
 34	dgm->layer.receive = cfdgml_receive;
 35	dgm->layer.transmit = cfdgml_transmit;
 36	snprintf(dgm->layer.name, CAIF_LAYER_NAME_SZ - 1, "dgm%d", channel_id);
 37	dgm->layer.name[CAIF_LAYER_NAME_SZ - 1] = '\0';
 38	return &dgm->layer;
 39}
 40
 41static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt)
 42{
 43	u8 cmd = -1;
 44	u8 dgmhdr[3];
 45	int ret;
 46	caif_assert(layr->up != NULL);
 47	caif_assert(layr->receive != NULL);
 48	caif_assert(layr->ctrlcmd != NULL);
 49
 50	if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
 51		pr_err("Packet is erroneous!\n");
 52		cfpkt_destroy(pkt);
 53		return -EPROTO;
 54	}
 55
 56	if ((cmd & DGM_CMD_BIT) == 0) {
 57		if (cfpkt_extr_head(pkt, &dgmhdr, 3) < 0) {
 58			pr_err("Packet is erroneous!\n");
 59			cfpkt_destroy(pkt);
 60			return -EPROTO;
 61		}
 62		ret = layr->up->receive(layr->up, pkt);
 63		return ret;
 64	}
 65
 66	switch (cmd) {
 67	case DGM_FLOW_OFF:	/* FLOW OFF */
 68		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
 69		cfpkt_destroy(pkt);
 70		return 0;
 71	case DGM_FLOW_ON:	/* FLOW ON */
 72		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
 73		cfpkt_destroy(pkt);
 74		return 0;
 75	default:
 76		cfpkt_destroy(pkt);
 77		pr_info("Unknown datagram control %d (0x%x)\n", cmd, cmd);
 78		return -EPROTO;
 79	}
 80}
 81
 82static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt)
 83{
 84	u8 packet_type;
 85	u32 zero = 0;
 86	struct caif_payload_info *info;
 87	struct cfsrvl *service = container_obj(layr);
 88	int ret;
 89
 90	if (!cfsrvl_ready(service, &ret)) {
 91		cfpkt_destroy(pkt);
 92		return ret;
 93	}
 94
 95	/* STE Modem cannot handle more than 1500 bytes datagrams */
 96	if (cfpkt_getlen(pkt) > DGM_MTU) {
 97		cfpkt_destroy(pkt);
 98		return -EMSGSIZE;
 99	}
100
101	cfpkt_add_head(pkt, &zero, 3);
102	packet_type = 0x08; /* B9 set - UNCLASSIFIED */
103	cfpkt_add_head(pkt, &packet_type, 1);
104
105	/* Add info for MUX-layer to route the packet out. */
106	info = cfpkt_info(pkt);
107	info->channel_id = service->layer.id;
108	/* To optimize alignment, we add up the size of CAIF header
109	 * before payload.
110	 */
111	info->hdr_len = 4;
112	info->dev_info = &service->dev_info;
113	return layr->dn->transmit(layr->dn, pkt);
114}