/*
 * 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/stddef.h>
#include <linux/spinlock.h>
#include <linux/slab.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 DGM_CMD_BIT  0x80
#define DGM_FLOW_OFF 0x81
#define DGM_FLOW_ON  0x80
#define DGM_MTU 1500

static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt);
static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt);

struct cflayer *cfdgml_create(u8 channel_id, struct dev_info *dev_info)
{
	struct cfsrvl *dgm = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
	if (!dgm)
		return NULL;
	caif_assert(offsetof(struct cfsrvl, layer) == 0);
	cfsrvl_init(dgm, channel_id, dev_info, true);
	dgm->layer.receive = cfdgml_receive;
	dgm->layer.transmit = cfdgml_transmit;
	snprintf(dgm->layer.name, CAIF_LAYER_NAME_SZ - 1, "dgm%d", channel_id);
	dgm->layer.name[CAIF_LAYER_NAME_SZ - 1] = '\0';
	return &dgm->layer;
}

static int cfdgml_receive(struct cflayer *layr, struct cfpkt *pkt)
{
	u8 cmd = -1;
	u8 dgmhdr[3];
	int ret;
	caif_assert(layr->up != NULL);
	caif_assert(layr->receive != NULL);
	caif_assert(layr->ctrlcmd != NULL);

	if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
		pr_err("Packet is erroneous!\n");
		cfpkt_destroy(pkt);
		return -EPROTO;
	}

	if ((cmd & DGM_CMD_BIT) == 0) {
		if (cfpkt_extr_head(pkt, &dgmhdr, 3) < 0) {
			pr_err("Packet is erroneous!\n");
			cfpkt_destroy(pkt);
			return -EPROTO;
		}
		ret = layr->up->receive(layr->up, pkt);
		return ret;
	}

	switch (cmd) {
	case DGM_FLOW_OFF:	/* FLOW OFF */
		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
		cfpkt_destroy(pkt);
		return 0;
	case DGM_FLOW_ON:	/* FLOW ON */
		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
		cfpkt_destroy(pkt);
		return 0;
	default:
		cfpkt_destroy(pkt);
		pr_info("Unknown datagram control %d (0x%x)\n", cmd, cmd);
		return -EPROTO;
	}
}

static int cfdgml_transmit(struct cflayer *layr, struct cfpkt *pkt)
{
	u8 packet_type;
	u32 zero = 0;
	struct caif_payload_info *info;
	struct cfsrvl *service = container_obj(layr);
	int ret;

	if (!cfsrvl_ready(service, &ret)) {
		cfpkt_destroy(pkt);
		return ret;
	}

	/* STE Modem cannot handle more than 1500 bytes datagrams */
	if (cfpkt_getlen(pkt) > DGM_MTU) {
		cfpkt_destroy(pkt);
		return -EMSGSIZE;
	}

	cfpkt_add_head(pkt, &zero, 3);
	packet_type = 0x08; /* B9 set - UNCLASSIFIED */
	cfpkt_add_head(pkt, &packet_type, 1);

	/* Add info for MUX-layer to route the packet out. */
	info = cfpkt_info(pkt);
	info->channel_id = service->layer.id;
	/* To optimize alignment, we add up the size of CAIF header
	 * before payload.
	 */
	info->hdr_len = 4;
	info->dev_info = &service->dev_info;
	return layr->dn->transmit(layr->dn, pkt);
}
b3157f828fcaadd259613f59db3c6d1c'>dt-bindings</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='2b1d530cb3157f828fcaadd259613f59db3c6d1c'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Kalle Valo &lt;kvalo@codeaurora.org&gt;</td><td class='right'>2017-01-27 14:19:25 +0200</td></tr>
<tr><th>committer</th><td>Kalle Valo &lt;kvalo@codeaurora.org&gt;</td><td class='right'>2017-01-28 09:15:50 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?id=2b1d530cb3157f828fcaadd259613f59db3c6d1c'>2b1d530cb3157f828fcaadd259613f59db3c6d1c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings?id=2b1d530cb3157f828fcaadd259613f59db3c6d1c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=2b1d530cb3157f828fcaadd259613f59db3c6d1c'>fb5dfe8f2e6956f54377c7275f330cd158ead259</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings?id=2b1d530cb3157f828fcaadd259613f59db3c6d1c'>include/dt-bindings</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?id=bd19b5ab1da654de456e102250822ec06311d6ad'>bd19b5ab1da654de456e102250822ec06311d6ad</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings?id=2b1d530cb3157f828fcaadd259613f59db3c6d1c&amp;id2=bd19b5ab1da654de456e102250822ec06311d6ad'>diff</a>)</td></tr></table>
<div class='commit-subject'>MAINTAINERS: ath9k-devel is closed</div><div class='commit-msg'>ath9k-devel list is now closed, only linux-wireless should be used.

Reported-by: Michael Renzmann &lt;mrenzmann@madwifi-project.org&gt;
Signed-off-by: Kalle Valo &lt;kvalo@codeaurora.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=2b1d530cb3157f828fcaadd259613f59db3c6d1c'>Diffstat</a> (limited to 'include/dt-bindings')</div><table summary='diffstat' class='diffstat'>