[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / broadcom / brcm80211 / brcmfmac / bcdc.c

/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*******************************************************************************
 * Communicates with the dongle by using dcmd codes.
 * For certain dcmd codes, the dongle interprets string data from the host.
 ******************************************************************************/

#include <linux/types.h>
#include <linux/netdevice.h>

#include <brcmu_utils.h>
#include <brcmu_wifi.h>

#include "core.h"
#include "bus.h"
#include "fwsignal.h"
#include "debug.h"
#include "tracepoint.h"
#include "proto.h"
#include "bcdc.h"

struct brcmf_proto_bcdc_dcmd {
	__le32 cmd;	/* dongle command value */
	__le32 len;	/* lower 16: output buflen;
			 * upper 16: input buflen (excludes header) */
	__le32 flags;	/* flag defns given below */
	__le32 status;	/* status code returned from the device */
};

/* BCDC flag definitions */
#define BCDC_DCMD_ERROR		0x01		/* 1=cmd failed */
#define BCDC_DCMD_SET		0x02		/* 0=get, 1=set cmd */
#define BCDC_DCMD_IF_MASK	0xF000		/* I/F index */
#define BCDC_DCMD_IF_SHIFT	12
#define BCDC_DCMD_ID_MASK	0xFFFF0000	/* id an cmd pairing */
#define BCDC_DCMD_ID_SHIFT	16		/* ID Mask shift bits */
#define BCDC_DCMD_ID(flags)	\
	(((flags) & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT)

/*
 * BCDC header - Broadcom specific extension of CDC.
 * Used on data packets to convey priority across USB.
 */
#define	BCDC_HEADER_LEN		4
#define BCDC_PROTO_VER		2	/* Protocol version */
#define BCDC_FLAG_VER_MASK	0xf0	/* Protocol version mask */
#define BCDC_FLAG_VER_SHIFT	4	/* Protocol version shift */
#define BCDC_FLAG_SUM_GOOD	0x04	/* Good RX checksums */
#define BCDC_FLAG_SUM_NEEDED	0x08	/* Dongle needs to do TX checksums */
#define BCDC_PRIORITY_MASK	0x7
#define BCDC_FLAG2_IF_MASK	0x0f	/* packet rx interface in APSTA */
#define BCDC_FLAG2_IF_SHIFT	0

#define BCDC_GET_IF_IDX(hdr) \
	((int)((((hdr)->flags2) & BCDC_FLAG2_IF_MASK) >> BCDC_FLAG2_IF_SHIFT))
#define BCDC_SET_IF_IDX(hdr, idx) \
	((hdr)->flags2 = (((hdr)->flags2 & ~BCDC_FLAG2_IF_MASK) | \
	((idx) << BCDC_FLAG2_IF_SHIFT)))

/**
 * struct brcmf_proto_bcdc_header - BCDC header format
 *
 * @flags: flags contain protocol and checksum info.
 * @priority: 802.1d priority and USB flow control info (bit 4:7).
 * @flags2: additional flags containing dongle interface index.
 * @data_offset: start of packet data. header is following by firmware signals.
 */
struct brcmf_proto_bcdc_header {
	u8 flags;
	u8 priority;
	u8 flags2;
	u8 data_offset;
};

/*
 * maximum length of firmware signal data between
 * the BCDC header and packet data in the tx path.
 */
#define BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES	12

#define RETRIES 2 /* # of retries to retrieve matching dcmd response */
#define BUS_HEADER_LEN	(16+64)		/* Must be atleast SDPCM_RESERVE
					 * (amount of header tha might be added)
					 * plus any space that might be needed
					 * for bus alignment padding.
					 */
struct brcmf_bcdc {
	u16 reqid;
	u8 bus_header[BUS_HEADER_LEN];
	struct brcmf_proto_bcdc_dcmd msg;
	unsigned char buf[BRCMF_DCMD_MAXLEN];
};


static int
brcmf_proto_bcdc_msg(struct brcmf_pub *drvr, int ifidx, uint cmd, void *buf,
		     uint len, bool set)
{
	struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd;
	struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
	u32 flags;

	brcmf_dbg(BCDC, "Enter\n");

	memset(msg, 0, sizeof(struct brcmf_proto_bcdc_dcmd));

	msg->cmd = cpu_to_le32(cmd);
	msg->len = cpu_to_le32(len);
	flags = (++bcdc->reqid << BCDC_DCMD_ID_SHIFT);
	if (set)
		flags |= BCDC_DCMD_SET;
	flags = (flags & ~BCDC_DCMD_IF_MASK) |
		(ifidx << BCDC_DCMD_IF_SHIFT);
	msg->flags = cpu_to_le32(flags);

	if (buf)
		memcpy(bcdc->buf, buf, len);

	len += sizeof(*msg);
	if (len > BRCMF_TX_IOCTL_MAX_MSG_SIZE)
		len = BRCMF_TX_IOCTL_MAX_MSG_SIZE;

	/* Send request */
	return brcmf_bus_txctl(drvr->bus_if, (unsigned char *)&bcdc->msg, len);
}

static int brcmf_proto_bcdc_cmplt(struct brcmf_pub *drvr, u32 id, u32 len)
{
	int ret;
	struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd;

	brcmf_dbg(BCDC, "Enter\n");
	len += sizeof(struct brcmf_proto_bcdc_dcmd);
	do {
		ret = brcmf_bus_rxctl(drvr->bus_if, (unsigned char *)&bcdc->msg,
				      len);
		if (ret < 0)
			break;
	} while (BCDC_DCMD_ID(le32_to_cpu(bcdc->msg.flags)) != id);

	return ret;
}

static int
brcmf_proto_bcdc_query_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
			    void *buf, uint len)
{
	struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd;
	struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
	void *info;
	int ret = 0, retries = 0;
	u32 id, flags;

	brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len);

	ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, false);
	if (ret < 0) {
		brcmf_err("brcmf_proto_bcdc_msg failed w/status %d\n",
			  ret);
		goto done;
	}

retry:
	/* wait for interrupt and get first fragment */
	ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len);
	if (ret < 0)
		goto done;

	flags = le32_to_cpu(msg->flags);
	id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT;

	if ((id < bcdc->reqid) && (++retries < RETRIES))
		goto retry;
	if (id != bcdc->reqid) {
		brcmf_err("%s: unexpected request id %d (expected %d)\n",
			  brcmf_ifname(brcmf_get_ifp(drvr, ifidx)), id,
			  bcdc->reqid);
		ret = -EINVAL;
		goto done;
	}

	/* Check info buffer */
	info = (void *)&bcdc->buf[0];

	/* Copy info buffer */
	if (buf) {
		if (ret < (int)len)
			len = ret;
		memcpy(buf, info, len);
	}

	/* Check the ERROR flag */
	if (flags & BCDC_DCMD_ERROR)
		ret = le32_to_cpu(msg->status);

done:
	return ret;
}

static int
brcmf_proto_bcdc_set_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
			  void *buf, uint len)
{
	struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd;
	struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
	int ret = 0;
	u32 flags, id;

	brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len);

	ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, true);
	if (ret < 0)
		goto done;

	ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len);
	if (ret < 0)
		goto done;

	flags = le32_to_cpu(msg->flags);
	id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT;

	if (id != bcdc->reqid) {
		brcmf_err("%s: unexpected request id %d (expected %d)\n",
			  brcmf_ifname(brcmf_get_ifp(drvr, ifidx)), id,
			  bcdc->reqid);
		ret = -EINVAL;
		goto done;
	}

	/* Check the ERROR flag */
	if (flags & BCDC_DCMD_ERROR)
		ret = le32_to_cpu(msg->status);

done:
	return ret;
}

static void
brcmf_proto_bcdc_hdrpush(struct brcmf_pub *drvr, int ifidx, u8 offset,
			 struct sk_buff *pktbuf)
{
	struct brcmf_proto_bcdc_header *h;

	brcmf_dbg(BCDC, "Enter\n");

	/* Push BDC header used to convey priority for buses that don't */
	skb_push(pktbuf, BCDC_HEADER_LEN);

	h = (struct brcmf_proto_bcdc_header *)(pktbuf->data);

	h->flags = (BCDC_PROTO_VER << BCDC_FLAG_VER_SHIFT);
	if (pktbuf->ip_summed == CHECKSUM_PARTIAL)
		h->flags |= BCDC_FLAG_SUM_NEEDED;

	h->priority = (pktbuf->priority & BCDC_PRIORITY_MASK);
	h->flags2 = 0;
	h->data_offset = offset;
	BCDC_SET_IF_IDX(h, ifidx);
	trace_brcmf_bcdchdr(pktbuf->data);
}

static int
brcmf_proto_bcdc_hdrpull(struct brcmf_pub *drvr, bool do_fws,
			 struct sk_buff *pktbuf, struct brcmf_if **ifp)
{
	struct brcmf_proto_bcdc_header *h;
	struct brcmf_if *tmp_if;

	brcmf_dbg(BCDC, "Enter\n");

	/* Pop BCDC header used to convey priority for buses that don't */
	if (pktbuf->len <= BCDC_HEADER_LEN) {
		brcmf_dbg(INFO, "rx data too short (%d <= %d)\n",
			  pktbuf->len, BCDC_HEADER_LEN);
		return -EBADE;
	}

	trace_brcmf_bcdchdr(pktbuf->data);
	h = (struct brcmf_proto_bcdc_header *)(pktbuf->data);

	tmp_if = brcmf_get_ifp(drvr, BCDC_GET_IF_IDX(h));
	if (!tmp_if) {
		brcmf_dbg(INFO, "no matching ifp found\n");
		return -EBADE;
	}
	if (((h->flags & BCDC_FLAG_VER_MASK) >> BCDC_FLAG_VER_SHIFT) !=
	    BCDC_PROTO_VER) {
		brcmf_err("%s: non-BCDC packet received, flags 0x%x\n",
			  brcmf_ifname(tmp_if), h->flags);
		return -EBADE;
	}

	if (h->flags & BCDC_FLAG_SUM_GOOD) {
		brcmf_dbg(BCDC, "%s: BDC rcv, good checksum, flags 0x%x\n",
			  brcmf_ifname(tmp_if), h->flags);
		pktbuf->ip_summed = CHECKSUM_UNNECESSARY;
	}

	pktbuf->priority = h->priority & BCDC_PRIORITY_MASK;

	skb_pull(pktbuf, BCDC_HEADER_LEN);
	if (do_fws)
		brcmf_fws_hdrpull(tmp_if, h->data_offset << 2, pktbuf);
	else
		skb_pull(pktbuf, h->data_offset << 2);

	if (pktbuf->len == 0)
		return -ENODATA;

	if (ifp != NULL)
		*ifp = tmp_if;
	return 0;
}

static int brcmf_proto_bcdc_tx_queue_data(struct brcmf_pub *drvr, int ifidx,
					  struct sk_buff *skb)
{
	struct brcmf_if *ifp = brcmf_get_ifp(drvr, ifidx);

	if (!brcmf_fws_queue_skbs(drvr->fws))
		return brcmf_proto_txdata(drvr, ifidx, 0, skb);

	return brcmf_fws_process_skb(ifp, skb);
}

static int
brcmf_proto_bcdc_txdata(struct brcmf_pub *drvr, int ifidx, u8 offset,
			struct sk_buff *pktbuf)
{
	brcmf_proto_bcdc_hdrpush(drvr, ifidx, offset, pktbuf);
	return brcmf_bus_txdata(drvr->bus_if, pktbuf);
}

static void
brcmf_proto_bcdc_configure_addr_mode(struct brcmf_pub *drvr, int ifidx,
				     enum proto_addr_mode addr_mode)
{
}

static void
brcmf_proto_bcdc_delete_peer(struct brcmf_pub *drvr, int ifidx,
			     u8 peer[ETH_ALEN])
{
}

static void
brcmf_proto_bcdc_add_tdls_peer(struct brcmf_pub *drvr, int ifidx,
			       u8 peer[ETH_ALEN])
{
}

static void brcmf_proto_bcdc_rxreorder(struct brcmf_if *ifp,
				       struct sk_buff *skb)
{
	brcmf_fws_rxreorder(ifp, skb);
}

int brcmf_proto_bcdc_attach(struct brcmf_pub *drvr)
{
	struct brcmf_bcdc *bcdc;

	bcdc = kzalloc(sizeof(*bcdc), GFP_ATOMIC);
	if (!bcdc)
		goto fail;

	/* ensure that the msg buf directly follows the cdc msg struct */
	if ((unsigned long)(&bcdc->msg + 1) != (unsigned long)bcdc->buf) {
		brcmf_err("struct brcmf_proto_bcdc is not correctly defined\n");
		goto fail;
	}

	drvr->proto->hdrpull = brcmf_proto_bcdc_hdrpull;
	drvr->proto->query_dcmd = brcmf_proto_bcdc_query_dcmd;
	drvr->proto->set_dcmd = brcmf_proto_bcdc_set_dcmd;
	drvr->proto->tx_queue_data = brcmf_proto_bcdc_tx_queue_data;
	drvr->proto->txdata = brcmf_proto_bcdc_txdata;
	drvr->proto->configure_addr_mode = brcmf_proto_bcdc_configure_addr_mode;
	drvr->proto->delete_peer = brcmf_proto_bcdc_delete_peer;
	drvr->proto->add_tdls_peer = brcmf_proto_bcdc_add_tdls_peer;
	drvr->proto->rxreorder = brcmf_proto_bcdc_rxreorder;
	drvr->proto->pd = bcdc;

	drvr->hdrlen += BCDC_HEADER_LEN + BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES;
	drvr->bus_if->maxctl = BRCMF_DCMD_MAXLEN +
			sizeof(struct brcmf_proto_bcdc_dcmd);
	return 0;

fail:
	kfree(bcdc);
	return -ENOMEM;
}

void brcmf_proto_bcdc_detach(struct brcmf_pub *drvr)
{
	kfree(drvr->proto->pd);
	drvr->proto->pd = NULL;
}
Commit	Line	Data
5b435de0 AS	1	/*
	2	* Copyright (c) 2010 Broadcom Corporation
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	11	* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	13	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	14	* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
	17	/*******************************************************************************
	18	* Communicates with the dongle by using dcmd codes.
	19	* For certain dcmd codes, the dongle interprets string data from the host.
	20	******************************************************************************/
	21
	22	#include <linux/types.h>
	23	#include <linux/netdevice.h>
5b435de0 AS	24
	25	#include <brcmu_utils.h>
	26	#include <brcmu_wifi.h>
	27
122d3d04	28	#include "core.h"
d14f78b9	29	#include "bus.h"
349e7104	30	#include "fwsignal.h"
a8e8ed34	31	#include "debug.h"
ea0737d6	32	#include "tracepoint.h"
85b84133 HM	33	#include "proto.h"
85b84133 HM	34	#include "bcdc.h"
5b435de0	35
aec87ce2	36	struct brcmf_proto_bcdc_dcmd {
5b435de0 AS	37	__le32 cmd; /* dongle command value */
	38	__le32 len; /* lower 16: output buflen;
	39	* upper 16: input buflen (excludes header) */
	40	__le32 flags; /* flag defns given below */
	41	__le32 status; /* status code returned from the device */
	42	};
	43
aec87ce2 HM	44	/* BCDC flag definitions */
	45	#define BCDC_DCMD_ERROR 0x01 /* 1=cmd failed */
	46	#define BCDC_DCMD_SET 0x02 /* 0=get, 1=set cmd */
	47	#define BCDC_DCMD_IF_MASK 0xF000 /* I/F index */
	48	#define BCDC_DCMD_IF_SHIFT 12
	49	#define BCDC_DCMD_ID_MASK 0xFFFF0000 /* id an cmd pairing */
	50	#define BCDC_DCMD_ID_SHIFT 16 /* ID Mask shift bits */
	51	#define BCDC_DCMD_ID(flags) \
	52	(((flags) & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT)
5b435de0 AS	53
5b435de0 AS	54	/*
aec87ce2	55	* BCDC header - Broadcom specific extension of CDC.
5b435de0 AS	56	* Used on data packets to convey priority across USB.
5b435de0 AS	57	*/
aec87ce2 HM	58	#define BCDC_HEADER_LEN 4
	59	#define BCDC_PROTO_VER 2 /* Protocol version */
	60	#define BCDC_FLAG_VER_MASK 0xf0 /* Protocol version mask */
	61	#define BCDC_FLAG_VER_SHIFT 4 /* Protocol version shift */
	62	#define BCDC_FLAG_SUM_GOOD 0x04 /* Good RX checksums */
	63	#define BCDC_FLAG_SUM_NEEDED 0x08 /* Dongle needs to do TX checksums */
	64	#define BCDC_PRIORITY_MASK 0x7
	65	#define BCDC_FLAG2_IF_MASK 0x0f /* packet rx interface in APSTA */
	66	#define BCDC_FLAG2_IF_SHIFT 0
	67
	68	#define BCDC_GET_IF_IDX(hdr) \
	69	((int)((((hdr)->flags2) & BCDC_FLAG2_IF_MASK) >> BCDC_FLAG2_IF_SHIFT))
	70	#define BCDC_SET_IF_IDX(hdr, idx) \
	71	((hdr)->flags2 = (((hdr)->flags2 & ~BCDC_FLAG2_IF_MASK) \| \
	72	((idx) << BCDC_FLAG2_IF_SHIFT)))
5b435de0	73
bee1b848	74	/**
aec87ce2	75	* struct brcmf_proto_bcdc_header - BCDC header format
bee1b848 AS	76	*
	77	* @flags: flags contain protocol and checksum info.
	78	* @priority: 802.1d priority and USB flow control info (bit 4:7).
	79	* @flags2: additional flags containing dongle interface index.
	80	* @data_offset: start of packet data. header is following by firmware signals.
	81	*/
aec87ce2	82	struct brcmf_proto_bcdc_header {
5b435de0	83	u8 flags;
bee1b848	84	u8 priority;
5b435de0	85	u8 flags2;
e40aed06	86	u8 data_offset;
5b435de0 AS	87	};
5b435de0 AS	88
bee1b848 AS	89	/*
bee1b848 AS	90	* maximum length of firmware signal data between
aec87ce2	91	* the BCDC header and packet data in the tx path.
bee1b848 AS	92	*/
bee1b848 AS	93	#define BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES 12
5b435de0 AS	94
5b435de0 AS	95	#define RETRIES 2 /* # of retries to retrieve matching dcmd response */
6e3c7128	96	#define BUS_HEADER_LEN (16+64) /* Must be atleast SDPCM_RESERVE
5b435de0 AS	97	* (amount of header tha might be added)
5b435de0 AS	98	* plus any space that might be needed
6e3c7128	99	* for bus alignment padding.
5b435de0	100	*/
85b84133	101	struct brcmf_bcdc {
5b435de0	102	u16 reqid;
5b435de0	103	u8 bus_header[BUS_HEADER_LEN];
aec87ce2	104	struct brcmf_proto_bcdc_dcmd msg;
8141083c	105	unsigned char buf[BRCMF_DCMD_MAXLEN];
5b435de0 AS	106	};
5b435de0 AS	107
8141083c HM	108
	109	static int
	110	brcmf_proto_bcdc_msg(struct brcmf_pub drvr, int ifidx, uint cmd, void buf,
	111	uint len, bool set)
5b435de0	112	{
85b84133	113	struct brcmf_bcdc bcdc = (struct brcmf_bcdc )drvr->proto->pd;
8141083c HM	114	struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
8141083c HM	115	u32 flags;
5b435de0	116
aec87ce2	117	brcmf_dbg(BCDC, "Enter\n");
5b435de0	118
8141083c HM	119	memset(msg, 0, sizeof(struct brcmf_proto_bcdc_dcmd));
	120
	121	msg->cmd = cpu_to_le32(cmd);
	122	msg->len = cpu_to_le32(len);
	123	flags = (++bcdc->reqid << BCDC_DCMD_ID_SHIFT);
	124	if (set)
	125	flags \|= BCDC_DCMD_SET;
	126	flags = (flags & ~BCDC_DCMD_IF_MASK) \|
	127	(ifidx << BCDC_DCMD_IF_SHIFT);
	128	msg->flags = cpu_to_le32(flags);
	129
	130	if (buf)
	131	memcpy(bcdc->buf, buf, len);
5b435de0	132
d4533992 HM	133	len += sizeof(*msg);
	134	if (len > BRCMF_TX_IOCTL_MAX_MSG_SIZE)
	135	len = BRCMF_TX_IOCTL_MAX_MSG_SIZE;
	136
5b435de0	137	/* Send request */
d4533992	138	return brcmf_bus_txctl(drvr->bus_if, (unsigned char *)&bcdc->msg, len);
5b435de0 AS	139	}
5b435de0 AS	140
aec87ce2	141	static int brcmf_proto_bcdc_cmplt(struct brcmf_pub *drvr, u32 id, u32 len)
5b435de0 AS	142	{
5b435de0 AS	143	int ret;
85b84133	144	struct brcmf_bcdc bcdc = (struct brcmf_bcdc )drvr->proto->pd;
5b435de0	145
aec87ce2 HM	146	brcmf_dbg(BCDC, "Enter\n");
aec87ce2 HM	147	len += sizeof(struct brcmf_proto_bcdc_dcmd);
5b435de0	148	do {
85b84133	149	ret = brcmf_bus_rxctl(drvr->bus_if, (unsigned char *)&bcdc->msg,
d9cb2596	150	len);
5b435de0 AS	151	if (ret < 0)
5b435de0 AS	152	break;
aec87ce2	153	} while (BCDC_DCMD_ID(le32_to_cpu(bcdc->msg.flags)) != id);
5b435de0 AS	154
	155	return ret;
	156	}
	157
85b84133 HM	158	static int
	159	brcmf_proto_bcdc_query_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
	160	void *buf, uint len)
5b435de0	161	{
85b84133	162	struct brcmf_bcdc bcdc = (struct brcmf_bcdc )drvr->proto->pd;
aec87ce2	163	struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
5b435de0 AS	164	void *info;
	165	int ret = 0, retries = 0;
	166	u32 id, flags;
	167
aec87ce2	168	brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len);
5b435de0	169
8141083c	170	ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, false);
5b435de0	171	if (ret < 0) {
aec87ce2	172	brcmf_err("brcmf_proto_bcdc_msg failed w/status %d\n",
5b435de0 AS	173	ret);
	174	goto done;
	175	}
	176
	177	retry:
	178	/* wait for interrupt and get first fragment */
aec87ce2	179	ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len);
5b435de0 AS	180	if (ret < 0)
	181	goto done;
	182
	183	flags = le32_to_cpu(msg->flags);
aec87ce2	184	id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT;
5b435de0	185
85b84133	186	if ((id < bcdc->reqid) && (++retries < RETRIES))
5b435de0	187	goto retry;
85b84133	188	if (id != bcdc->reqid) {
5e8149f5	189	brcmf_err("%s: unexpected request id %d (expected %d)\n",
c9c00438 HM	190	brcmf_ifname(brcmf_get_ifp(drvr, ifidx)), id,
c9c00438 HM	191	bcdc->reqid);
5b435de0 AS	192	ret = -EINVAL;
	193	goto done;
	194	}
	195
	196	/* Check info buffer */
704d1c6b	197	info = (void *)&bcdc->buf[0];
5b435de0 AS	198
	199	/* Copy info buffer */
	200	if (buf) {
	201	if (ret < (int)len)
	202	len = ret;
	203	memcpy(buf, info, len);
	204	}
	205
	206	/* Check the ERROR flag */
aec87ce2	207	if (flags & BCDC_DCMD_ERROR)
5b435de0	208	ret = le32_to_cpu(msg->status);
5b435de0 AS	209
	210	done:
	211	return ret;
	212	}
	213
85b84133 HM	214	static int
	215	brcmf_proto_bcdc_set_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
	216	void *buf, uint len)
5b435de0	217	{
85b84133	218	struct brcmf_bcdc bcdc = (struct brcmf_bcdc )drvr->proto->pd;
aec87ce2	219	struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
5b435de0 AS	220	int ret = 0;
	221	u32 flags, id;
	222
aec87ce2	223	brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len);
5b435de0	224
8141083c	225	ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, true);
5b435de0 AS	226	if (ret < 0)
	227	goto done;
	228
aec87ce2	229	ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len);
5b435de0 AS	230	if (ret < 0)
	231	goto done;
	232
	233	flags = le32_to_cpu(msg->flags);
aec87ce2	234	id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT;
5b435de0	235
85b84133	236	if (id != bcdc->reqid) {
5e8149f5	237	brcmf_err("%s: unexpected request id %d (expected %d)\n",
c9c00438 HM	238	brcmf_ifname(brcmf_get_ifp(drvr, ifidx)), id,
c9c00438 HM	239	bcdc->reqid);
5b435de0 AS	240	ret = -EINVAL;
	241	goto done;
	242	}
	243
	244	/* Check the ERROR flag */
aec87ce2	245	if (flags & BCDC_DCMD_ERROR)
5b435de0	246	ret = le32_to_cpu(msg->status);
5b435de0 AS	247
	248	done:
	249	return ret;
	250	}
	251
85b84133 HM	252	static void
85b84133 HM	253	brcmf_proto_bcdc_hdrpush(struct brcmf_pub *drvr, int ifidx, u8 offset,
5b435de0 AS	254	struct sk_buff *pktbuf)
5b435de0 AS	255	{
aec87ce2	256	struct brcmf_proto_bcdc_header *h;
5b435de0	257
aec87ce2	258	brcmf_dbg(BCDC, "Enter\n");
5b435de0 AS	259
5b435de0 AS	260	/* Push BDC header used to convey priority for buses that don't */
aec87ce2	261	skb_push(pktbuf, BCDC_HEADER_LEN);
5b435de0	262
aec87ce2	263	h = (struct brcmf_proto_bcdc_header *)(pktbuf->data);
5b435de0	264
aec87ce2 HM	265	h->flags = (BCDC_PROTO_VER << BCDC_FLAG_VER_SHIFT);
	266	if (pktbuf->ip_summed == CHECKSUM_PARTIAL)
	267	h->flags \|= BCDC_FLAG_SUM_NEEDED;
5b435de0	268
aec87ce2	269	h->priority = (pktbuf->priority & BCDC_PRIORITY_MASK);
5b435de0	270	h->flags2 = 0;
8f0c3b6d	271	h->data_offset = offset;
aec87ce2 HM	272	BCDC_SET_IF_IDX(h, ifidx);
aec87ce2 HM	273	trace_brcmf_bcdchdr(pktbuf->data);
5b435de0 AS	274	}
5b435de0 AS	275
85b84133	276	static int
796cfb65 AS	277	brcmf_proto_bcdc_hdrpull(struct brcmf_pub *drvr, bool do_fws,
796cfb65 AS	278	struct sk_buff pktbuf, struct brcmf_if *ifp)
5b435de0	279	{
aec87ce2	280	struct brcmf_proto_bcdc_header *h;
796cfb65	281	struct brcmf_if *tmp_if;
5b435de0	282
aec87ce2	283	brcmf_dbg(BCDC, "Enter\n");
5b435de0	284
aec87ce2 HM	285	/* Pop BCDC header used to convey priority for buses that don't */
aec87ce2 HM	286	if (pktbuf->len <= BCDC_HEADER_LEN) {
5cd02c77	287	brcmf_dbg(INFO, "rx data too short (%d <= %d)\n",
aec87ce2	288	pktbuf->len, BCDC_HEADER_LEN);
5b435de0 AS	289	return -EBADE;
	290	}
	291
aec87ce2 HM	292	trace_brcmf_bcdchdr(pktbuf->data);
aec87ce2 HM	293	h = (struct brcmf_proto_bcdc_header *)(pktbuf->data);
5b435de0	294
796cfb65 AS	295	tmp_if = brcmf_get_ifp(drvr, BCDC_GET_IF_IDX(h));
796cfb65 AS	296	if (!tmp_if) {
75effb03	297	brcmf_dbg(INFO, "no matching ifp found\n");
5b435de0 AS	298	return -EBADE;
5b435de0 AS	299	}
aec87ce2 HM	300	if (((h->flags & BCDC_FLAG_VER_MASK) >> BCDC_FLAG_VER_SHIFT) !=
	301	BCDC_PROTO_VER) {
	302	brcmf_err("%s: non-BCDC packet received, flags 0x%x\n",
c9c00438	303	brcmf_ifname(tmp_if), h->flags);
5b435de0 AS	304	return -EBADE;
	305	}
	306
aec87ce2 HM	307	if (h->flags & BCDC_FLAG_SUM_GOOD) {
aec87ce2 HM	308	brcmf_dbg(BCDC, "%s: BDC rcv, good checksum, flags 0x%x\n",
c9c00438	309	brcmf_ifname(tmp_if), h->flags);
aec87ce2	310	pktbuf->ip_summed = CHECKSUM_UNNECESSARY;
5b435de0 AS	311	}
5b435de0 AS	312
aec87ce2	313	pktbuf->priority = h->priority & BCDC_PRIORITY_MASK;
5b435de0	314
aec87ce2	315	skb_pull(pktbuf, BCDC_HEADER_LEN);
349e7104	316	if (do_fws)
c67d41ba	317	brcmf_fws_hdrpull(tmp_if, h->data_offset << 2, pktbuf);
349e7104 AS	318	else
349e7104 AS	319	skb_pull(pktbuf, h->data_offset << 2);
5b435de0	320
a43af515 AS	321	if (pktbuf->len == 0)
a43af515 AS	322	return -ENODATA;
75effb03	323
53985dcc PF	324	if (ifp != NULL)
53985dcc PF	325	*ifp = tmp_if;
5b435de0 AS	326	return 0;
	327	}
	328
b073ac1f RM	329	static int brcmf_proto_bcdc_tx_queue_data(struct brcmf_pub *drvr, int ifidx,
	330	struct sk_buff *skb)
	331	{
	332	struct brcmf_if *ifp = brcmf_get_ifp(drvr, ifidx);
	333
	334	if (!brcmf_fws_queue_skbs(drvr->fws))
	335	return brcmf_proto_txdata(drvr, ifidx, 0, skb);
	336
	337	return brcmf_fws_process_skb(ifp, skb);
	338	}
	339
7b8a466e HM	340	static int
	341	brcmf_proto_bcdc_txdata(struct brcmf_pub *drvr, int ifidx, u8 offset,
	342	struct sk_buff *pktbuf)
	343	{
	344	brcmf_proto_bcdc_hdrpush(drvr, ifidx, offset, pktbuf);
	345	return brcmf_bus_txdata(drvr->bus_if, pktbuf);
	346	}
	347
8851cce0 HM	348	static void
	349	brcmf_proto_bcdc_configure_addr_mode(struct brcmf_pub *drvr, int ifidx,
	350	enum proto_addr_mode addr_mode)
	351	{
	352	}
	353
	354	static void
	355	brcmf_proto_bcdc_delete_peer(struct brcmf_pub *drvr, int ifidx,
	356	u8 peer[ETH_ALEN])
	357	{
	358	}
7b8a466e	359
70b7d94b HM	360	static void
	361	brcmf_proto_bcdc_add_tdls_peer(struct brcmf_pub *drvr, int ifidx,
	362	u8 peer[ETH_ALEN])
	363	{
	364	}
	365
bbd1f932 AS	366	static void brcmf_proto_bcdc_rxreorder(struct brcmf_if *ifp,
	367	struct sk_buff *skb)
	368	{
	369	brcmf_fws_rxreorder(ifp, skb);
	370	}
	371
85b84133	372	int brcmf_proto_bcdc_attach(struct brcmf_pub *drvr)
5b435de0	373	{
85b84133	374	struct brcmf_bcdc *bcdc;
5b435de0	375
85b84133 HM	376	bcdc = kzalloc(sizeof(*bcdc), GFP_ATOMIC);
85b84133 HM	377	if (!bcdc)
5b435de0 AS	378	goto fail;
	379
	380	/* ensure that the msg buf directly follows the cdc msg struct */
85b84133 HM	381	if ((unsigned long)(&bcdc->msg + 1) != (unsigned long)bcdc->buf) {
85b84133 HM	382	brcmf_err("struct brcmf_proto_bcdc is not correctly defined\n");
5b435de0 AS	383	goto fail;
	384	}
	385
85b84133 HM	386	drvr->proto->hdrpull = brcmf_proto_bcdc_hdrpull;
	387	drvr->proto->query_dcmd = brcmf_proto_bcdc_query_dcmd;
	388	drvr->proto->set_dcmd = brcmf_proto_bcdc_set_dcmd;
b073ac1f	389	drvr->proto->tx_queue_data = brcmf_proto_bcdc_tx_queue_data;
7b8a466e	390	drvr->proto->txdata = brcmf_proto_bcdc_txdata;
8851cce0 HM	391	drvr->proto->configure_addr_mode = brcmf_proto_bcdc_configure_addr_mode;
8851cce0 HM	392	drvr->proto->delete_peer = brcmf_proto_bcdc_delete_peer;
70b7d94b	393	drvr->proto->add_tdls_peer = brcmf_proto_bcdc_add_tdls_peer;
bbd1f932	394	drvr->proto->rxreorder = brcmf_proto_bcdc_rxreorder;
85b84133 HM	395	drvr->proto->pd = bcdc;
85b84133 HM	396
aec87ce2	397	drvr->hdrlen += BCDC_HEADER_LEN + BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES;
b01a6b3c	398	drvr->bus_if->maxctl = BRCMF_DCMD_MAXLEN +
8141083c	399	sizeof(struct brcmf_proto_bcdc_dcmd);
5b435de0 AS	400	return 0;
	401
	402	fail:
85b84133	403	kfree(bcdc);
5b435de0 AS	404	return -ENOMEM;
	405	}
	406
85b84133	407	void brcmf_proto_bcdc_detach(struct brcmf_pub *drvr)
5b435de0	408	{
85b84133 HM	409	kfree(drvr->proto->pd);
85b84133 HM	410	drvr->proto->pd = NULL;
5b435de0	411	}