brcmfmac: Adding msgbuf protocol.

This patch will add the msgbuf protocol. This protocol is used by
the soon to be added new bus interface PCIe. Msgbuf is a protocol
where most data is and remains located on the host (driver) side
and transferred by DMA from and to device. Msgbuf is the protocol
which takes care of the signalling of the buffers between host and
device which identifies this DMA-able data.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1387 insertions, 0 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
new file mode 100644
index 000000000000..c7a1c59ba6c3
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
@@ -0,0 +1,1387 @@
+/* Copyright (c) 2014 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 "dhd.h"
+#include "dhd_dbg.h"
+#include "proto.h"
+#include "msgbuf.h"
+#include "commonring.h"
+#include "flowring.h"
+#include "dhd_bus.h"
+#include "tracepoint.h"
+
+
+#define MSGBUF_IOCTL_RESP_TIMEOUT		2000
+
+#define MSGBUF_TYPE_GEN_STATUS			0x1
+#define MSGBUF_TYPE_RING_STATUS			0x2
+#define MSGBUF_TYPE_FLOW_RING_CREATE		0x3
+#define MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT	0x4
+#define MSGBUF_TYPE_FLOW_RING_DELETE		0x5
+#define MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT	0x6
+#define MSGBUF_TYPE_FLOW_RING_FLUSH		0x7
+#define MSGBUF_TYPE_FLOW_RING_FLUSH_CMPLT	0x8
+#define MSGBUF_TYPE_IOCTLPTR_REQ		0x9
+#define MSGBUF_TYPE_IOCTLPTR_REQ_ACK		0xA
+#define MSGBUF_TYPE_IOCTLRESP_BUF_POST		0xB
+#define MSGBUF_TYPE_IOCTL_CMPLT			0xC
+#define MSGBUF_TYPE_EVENT_BUF_POST		0xD
+#define MSGBUF_TYPE_WL_EVENT			0xE
+#define MSGBUF_TYPE_TX_POST			0xF
+#define MSGBUF_TYPE_TX_STATUS			0x10
+#define MSGBUF_TYPE_RXBUF_POST			0x11
+#define MSGBUF_TYPE_RX_CMPLT			0x12
+#define MSGBUF_TYPE_LPBK_DMAXFER		0x13
+#define MSGBUF_TYPE_LPBK_DMAXFER_CMPLT		0x14
+
+#define NR_TX_PKTIDS				2048
+#define NR_RX_PKTIDS				1024
+
+#define BRCMF_IOCTL_REQ_PKTID			0xFFFE
+
+#define BRCMF_MSGBUF_MAX_PKT_SIZE		2048
+#define BRCMF_MSGBUF_RXBUFPOST_THRESHOLD	32
+#define BRCMF_MSGBUF_MAX_IOCTLRESPBUF_POST	8
+#define BRCMF_MSGBUF_MAX_EVENTBUF_POST		8
+
+#define BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_3	0x01
+#define BRCMF_MSGBUF_PKT_FLAGS_PRIO_SHIFT	5
+
+#define BRCMF_MSGBUF_TX_FLUSH_CNT1		32
+#define BRCMF_MSGBUF_TX_FLUSH_CNT2		96
+
+
+struct msgbuf_common_hdr {
+	u8				msgtype;
+	u8				ifidx;
+	u8				flags;
+	u8				rsvd0;
+	__le32				request_id;
+};
+
+struct msgbuf_buf_addr {
+	__le32				low_addr;
+	__le32				high_addr;
+};
+
+struct msgbuf_ioctl_req_hdr {
+	struct msgbuf_common_hdr	msg;
+	__le32				cmd;
+	__le16				trans_id;
+	__le16				input_buf_len;
+	__le16				output_buf_len;
+	__le16				rsvd0[3];
+	struct msgbuf_buf_addr		req_buf_addr;
+	__le32				rsvd1[2];
+};
+
+struct msgbuf_tx_msghdr {
+	struct msgbuf_common_hdr	msg;
+	u8				txhdr[ETH_HLEN];
+	u8				flags;
+	u8				seg_cnt;
+	struct msgbuf_buf_addr		metadata_buf_addr;
+	struct msgbuf_buf_addr		data_buf_addr;
+	__le16				metadata_buf_len;
+	__le16				data_len;
+	__le32				rsvd0;
+};
+
+struct msgbuf_rx_bufpost {
+	struct msgbuf_common_hdr	msg;
+	__le16				metadata_buf_len;
+	__le16				data_buf_len;
+	__le32				rsvd0;
+	struct msgbuf_buf_addr		metadata_buf_addr;
+	struct msgbuf_buf_addr		data_buf_addr;
+};
+
+struct msgbuf_rx_ioctl_resp_or_event {
+	struct msgbuf_common_hdr	msg;
+	__le16				host_buf_len;
+	__le16				rsvd0[3];
+	struct msgbuf_buf_addr		host_buf_addr;
+	__le32				rsvd1[4];
+};
+
+struct msgbuf_completion_hdr {
+	__le16				status;
+	__le16				flow_ring_id;
+};
+
+struct msgbuf_rx_event {
+	struct msgbuf_common_hdr	msg;
+	struct msgbuf_completion_hdr	compl_hdr;
+	__le16				event_data_len;
+	__le16				seqnum;
+	__le16				rsvd0[4];
+};
+
+struct msgbuf_ioctl_resp_hdr {
+	struct msgbuf_common_hdr	msg;
+	struct msgbuf_completion_hdr	compl_hdr;
+	__le16				resp_len;
+	__le16				trans_id;
+	__le32				cmd;
+	__le32				rsvd0;
+};
+
+struct msgbuf_tx_status {
+	struct msgbuf_common_hdr	msg;
+	struct msgbuf_completion_hdr	compl_hdr;
+	__le16				metadata_len;
+	__le16				tx_status;
+};
+
+struct msgbuf_rx_complete {
+	struct msgbuf_common_hdr	msg;
+	struct msgbuf_completion_hdr	compl_hdr;
+	__le16				metadata_len;
+	__le16				data_len;
+	__le16				data_offset;
+	__le16				flags;
+	__le32				rx_status_0;
+	__le32				rx_status_1;
+	__le32				rsvd0;
+};
+
+struct msgbuf_tx_flowring_create_req {
+	struct msgbuf_common_hdr	msg;
+	u8				da[ETH_ALEN];
+	u8				sa[ETH_ALEN];
+	u8				tid;
+	u8				if_flags;
+	__le16				flow_ring_id;
+	u8				tc;
+	u8				priority;
+	__le16				int_vector;
+	__le16				max_items;
+	__le16				len_item;
+	struct msgbuf_buf_addr		flow_ring_addr;
+};
+
+struct msgbuf_tx_flowring_delete_req {
+	struct msgbuf_common_hdr	msg;
+	__le16				flow_ring_id;
+	__le16				reason;
+	__le32				rsvd0[7];
+};
+
+struct msgbuf_flowring_create_resp {
+	struct msgbuf_common_hdr	msg;
+	struct msgbuf_completion_hdr	compl_hdr;
+	__le32				rsvd0[3];
+};
+
+struct msgbuf_flowring_delete_resp {
+	struct msgbuf_common_hdr	msg;
+	struct msgbuf_completion_hdr	compl_hdr;
+	__le32				rsvd0[3];
+};
+
+struct msgbuf_flowring_flush_resp {
+	struct msgbuf_common_hdr	msg;
+	struct msgbuf_completion_hdr	compl_hdr;
+	__le32				rsvd0[3];
+};
+
+struct brcmf_msgbuf {
+	struct brcmf_pub *drvr;
+
+	struct brcmf_commonring **commonrings;
+	struct brcmf_commonring **flowrings;
+	dma_addr_t *flowring_dma_handle;
+	u16 nrof_flowrings;
+
+	u16 rx_dataoffset;
+	u32 max_rxbufpost;
+	u16 rx_metadata_offset;
+	u32 rxbufpost;
+
+	u32 max_ioctlrespbuf;
+	u32 cur_ioctlrespbuf;
+	u32 max_eventbuf;
+	u32 cur_eventbuf;
+
+	void *ioctbuf;
+	dma_addr_t ioctbuf_handle;
+	u32 ioctbuf_phys_hi;
+	u32 ioctbuf_phys_lo;
+	u32 ioctl_resp_status;
+	u32 ioctl_resp_ret_len;
+	u32 ioctl_resp_pktid;
+
+	u16 data_seq_no;
+	u16 ioctl_seq_no;
+	u32 reqid;
+	wait_queue_head_t ioctl_resp_wait;
+	bool ctl_completed;
+
+	struct brcmf_msgbuf_pktids *tx_pktids;
+	struct brcmf_msgbuf_pktids *rx_pktids;
+	struct brcmf_flowring *flow;
+
+	struct workqueue_struct *txflow_wq;
+	struct work_struct txflow_work;
+	unsigned long *flow_map;
+	unsigned long *txstatus_done_map;
+};
+
+struct brcmf_msgbuf_pktid {
+	atomic_t  allocated;
+	u16 data_offset;
+	struct sk_buff *skb;
+	dma_addr_t physaddr;
+};
+
+struct brcmf_msgbuf_pktids {
+	u32 array_size;
+	u32 last_allocated_idx;
+	enum dma_data_direction direction;
+	struct brcmf_msgbuf_pktid *array;
+};
+
+
+/* dma flushing needs implementation for mips and arm platforms. Should
+ * be put in util. Note, this is not real flushing. It is virtual non
+ * cached memory. Only write buffers should have to be drained. Though
+ * this may be different depending on platform......
+ */
+#define brcmf_dma_flush(addr, len)
+#define brcmf_dma_invalidate_cache(addr, len)
+
+
+static void brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf *msgbuf);
+
+
+static struct brcmf_msgbuf_pktids *
+brcmf_msgbuf_init_pktids(u32 nr_array_entries,
+			 enum dma_data_direction direction)
+{
+	struct brcmf_msgbuf_pktid *array;
+	struct brcmf_msgbuf_pktids *pktids;
+
+	array = kcalloc(nr_array_entries, sizeof(*array), GFP_ATOMIC);
+	if (!array)
+		return NULL;
+
+	pktids = kzalloc(sizeof(*pktids), GFP_ATOMIC);
+	if (!pktids) {
+		kfree(array);
+		return NULL;
+	}
+	pktids->array = array;
+	pktids->array_size = nr_array_entries;
+
+	return pktids;
+}
+
+
+static int
+brcmf_msgbuf_alloc_pktid(struct device *dev,
+			 struct brcmf_msgbuf_pktids *pktids,
+			 struct sk_buff *skb, u16 data_offset,
+			 dma_addr_t *physaddr, u32 *idx)
+{
+	struct brcmf_msgbuf_pktid *array;
+	u32 count;
+
+	array = pktids->array;
+
+	*physaddr = dma_map_single(dev, skb->data + data_offset,
+				   skb->len - data_offset, pktids->direction);
+
+	if (dma_mapping_error(dev, *physaddr)) {
+		brcmf_err("dma_map_single failed !!\n");
+		return -ENOMEM;
+	}
+
+	*idx = pktids->last_allocated_idx;
+
+	count = 0;
+	do {
+		(*idx)++;
+		if (*idx == pktids->array_size)
+			*idx = 0;
+		if (array[*idx].allocated.counter == 0)
+			if (atomic_cmpxchg(&array[*idx].allocated, 0, 1) == 0)
+				break;
+		count++;
+	} while (count < pktids->array_size);
+
+	if (count == pktids->array_size)
+		return -ENOMEM;
+
+	array[*idx].data_offset = data_offset;
+	array[*idx].physaddr = *physaddr;
+	array[*idx].skb = skb;
+
+	pktids->last_allocated_idx = *idx;
+
+	return 0;
+}
+
+
+static struct sk_buff *
+brcmf_msgbuf_get_pktid(struct device *dev, struct brcmf_msgbuf_pktids *pktids,
+		       u32 idx)
+{
+	struct brcmf_msgbuf_pktid *pktid;
+	struct sk_buff *skb;
+
+	if (idx >= pktids->array_size) {
+		brcmf_err("Invalid packet id %d (max %d)\n", idx,
+			  pktids->array_size);
+		return NULL;
+	}
+	if (pktids->array[idx].allocated.counter) {
+		pktid = &pktids->array[idx];
+		dma_unmap_single(dev, pktid->physaddr,
+				 pktid->skb->len - pktid->data_offset,
+				 pktids->direction);
+		skb = pktid->skb;
+		pktid->allocated.counter = 0;
+		return skb;
+	} else {
+		brcmf_err("Invalid packet id %d (not in use)\n", idx);
+	}
+
+	return NULL;
+}
+
+
+static void
+brcmf_msgbuf_release_array(struct device *dev,
+			   struct brcmf_msgbuf_pktids *pktids)
+{
+	struct brcmf_msgbuf_pktid *array;
+	struct brcmf_msgbuf_pktid *pktid;
+	u32 count;
+
+	array = pktids->array;
+	count = 0;
+	do {
+		if (array[count].allocated.counter) {
+			pktid = &array[count];
+			dma_unmap_single(dev, pktid->physaddr,
+					 pktid->skb->len - pktid->data_offset,
+					 pktids->direction);
+			brcmu_pkt_buf_free_skb(pktid->skb);
+		}
+		count++;
+	} while (count < pktids->array_size);
+
+	kfree(array);
+	kfree(pktids);
+}
+
+
+static void brcmf_msgbuf_release_pktids(struct brcmf_msgbuf *msgbuf)
+{
+	if (msgbuf->rx_pktids)
+		brcmf_msgbuf_release_array(msgbuf->drvr->bus_if->dev,
+					   msgbuf->rx_pktids);
+	if (msgbuf->tx_pktids)
+		brcmf_msgbuf_release_array(msgbuf->drvr->bus_if->dev,
+					   msgbuf->tx_pktids);
+}
+
+
+static int brcmf_msgbuf_tx_ioctl(struct brcmf_pub *drvr, int ifidx,
+				 uint cmd, void *buf, uint len)
+{
+	struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+	struct brcmf_commonring *commonring;
+	struct msgbuf_ioctl_req_hdr *request;
+	u16 buf_len;
+	void *ret_ptr;
+	int err;
+
+	commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
+	brcmf_commonring_lock(commonring);
+	ret_ptr = brcmf_commonring_reserve_for_write(commonring);
+	if (!ret_ptr) {
+		brcmf_err("Failed to reserve space in commonring\n");
+		brcmf_commonring_unlock(commonring);
+		return -ENOMEM;
+	}
+
+	msgbuf->reqid++;
+
+	request = (struct msgbuf_ioctl_req_hdr *)ret_ptr;
+	request->msg.msgtype = MSGBUF_TYPE_IOCTLPTR_REQ;
+	request->msg.ifidx = (u8)ifidx;
+	request->msg.flags = 0;
+	request->msg.request_id = cpu_to_le32(BRCMF_IOCTL_REQ_PKTID);
+	request->cmd = cpu_to_le32(cmd);
+	request->output_buf_len = cpu_to_le16(len);
+	request->trans_id = cpu_to_le16(msgbuf->reqid);
+
+	buf_len = min_t(u16, len, BRCMF_TX_IOCTL_MAX_MSG_SIZE);
+	request->input_buf_len = cpu_to_le16(buf_len);
+	request->req_buf_addr.high_addr = cpu_to_le32(msgbuf->ioctbuf_phys_hi);
+	request->req_buf_addr.low_addr = cpu_to_le32(msgbuf->ioctbuf_phys_lo);
+	if (buf)
+		memcpy(msgbuf->ioctbuf, buf, buf_len);
+	else
+		memset(msgbuf->ioctbuf, 0, buf_len);
+	brcmf_dma_flush(ioctl_buf, buf_len);
+
+	err = brcmf_commonring_write_complete(commonring);
+	brcmf_commonring_unlock(commonring);
+
+	return err;
+}
+
+
+static int brcmf_msgbuf_ioctl_resp_wait(struct brcmf_msgbuf *msgbuf)
+{
+	return wait_event_timeout(msgbuf->ioctl_resp_wait,
+				  msgbuf->ctl_completed,
+				  msecs_to_jiffies(MSGBUF_IOCTL_RESP_TIMEOUT));
+}
+
+
+static void brcmf_msgbuf_ioctl_resp_wake(struct brcmf_msgbuf *msgbuf)
+{
+	if (waitqueue_active(&msgbuf->ioctl_resp_wait)) {
+		msgbuf->ctl_completed = true;
+		wake_up(&msgbuf->ioctl_resp_wait);
+	}
+}
+
+
+static int brcmf_msgbuf_query_dcmd(struct brcmf_pub *drvr, int ifidx,
+				   uint cmd, void *buf, uint len)
+{
+	struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+	struct sk_buff *skb = NULL;
+	int timeout;
+	int err;
+
+	brcmf_dbg(MSGBUF, "ifidx=%d, cmd=%d, len=%d\n", ifidx, cmd, len);
+	msgbuf->ctl_completed = false;
+	err = brcmf_msgbuf_tx_ioctl(drvr, ifidx, cmd, buf, len);
+	if (err)
+		return err;
+
+	timeout = brcmf_msgbuf_ioctl_resp_wait(msgbuf);
+	if (!timeout) {
+		brcmf_err("Timeout on response for query command\n");
+		return -EIO;
+	}
+
+	skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
+				     msgbuf->rx_pktids,
+				     msgbuf->ioctl_resp_pktid);
+	if (msgbuf->ioctl_resp_ret_len != 0) {
+		if (!skb) {
+			brcmf_err("Invalid packet id idx recv'd %d\n",
+				  msgbuf->ioctl_resp_pktid);
+			return -EBADF;
+		}
+		memcpy(buf, skb->data, (len < msgbuf->ioctl_resp_ret_len) ?
+				       len : msgbuf->ioctl_resp_ret_len);
+	}
+	if (skb)
+		brcmu_pkt_buf_free_skb(skb);
+
+	return msgbuf->ioctl_resp_status;
+}
+
+
+static int brcmf_msgbuf_set_dcmd(struct brcmf_pub *drvr, int ifidx,
+				 uint cmd, void *buf, uint len)
+{
+	return brcmf_msgbuf_query_dcmd(drvr, ifidx, cmd, buf, len);
+}
+
+
+static int brcmf_msgbuf_hdrpull(struct brcmf_pub *drvr, bool do_fws,
+				u8 *ifidx, struct sk_buff *skb)
+{
+	return -ENODEV;
+}
+
+
+static void
+brcmf_msgbuf_remove_flowring(struct brcmf_msgbuf *msgbuf, u16 flowid)
+{
+	u32 dma_sz;
+	void *dma_buf;
+
+	brcmf_dbg(MSGBUF, "Removing flowring %d\n", flowid);
+
+	dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE;
+	dma_buf = msgbuf->flowrings[flowid]->buf_addr;
+	dma_free_coherent(msgbuf->drvr->bus_if->dev, dma_sz, dma_buf,
+			  msgbuf->flowring_dma_handle[flowid]);
+
+	brcmf_flowring_delete(msgbuf->flow, flowid);
+}
+
+
+static u32 brcmf_msgbuf_flowring_create(struct brcmf_msgbuf *msgbuf, int ifidx,
+					struct sk_buff *skb)
+{
+	struct msgbuf_tx_flowring_create_req *create;
+	struct ethhdr *eh = (struct ethhdr *)(skb->data);
+	struct brcmf_commonring *commonring;
+	void *ret_ptr;
+	u32 flowid;
+	void *dma_buf;
+	u32 dma_sz;
+	long long address;
+	int err;
+
+	flowid = brcmf_flowring_create(msgbuf->flow, eh->h_dest,
+				       skb->priority, ifidx);
+	if (flowid == BRCMF_FLOWRING_INVALID_ID)
+		return flowid;
+
+	dma_sz = BRCMF_H2D_TXFLOWRING_MAX_ITEM * BRCMF_H2D_TXFLOWRING_ITEMSIZE;
+
+	dma_buf = dma_alloc_coherent(msgbuf->drvr->bus_if->dev, dma_sz,
+				     &msgbuf->flowring_dma_handle[flowid],
+				     GFP_ATOMIC);
+	if (!dma_buf) {
+		brcmf_err("dma_alloc_coherent failed\n");
+		brcmf_flowring_delete(msgbuf->flow, flowid);
+		return BRCMF_FLOWRING_INVALID_ID;
+	}
+
+	brcmf_commonring_config(msgbuf->flowrings[flowid],
+				BRCMF_H2D_TXFLOWRING_MAX_ITEM,
+				BRCMF_H2D_TXFLOWRING_ITEMSIZE, dma_buf);
+
+	commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
+	brcmf_commonring_lock(commonring);
+	ret_ptr = brcmf_commonring_reserve_for_write(commonring);
+	if (!ret_ptr) {
+		brcmf_err("Failed to reserve space in commonring\n");
+		brcmf_commonring_unlock(commonring);
+		brcmf_msgbuf_remove_flowring(msgbuf, flowid);
+		return BRCMF_FLOWRING_INVALID_ID;
+	}
+
+	create = (struct msgbuf_tx_flowring_create_req *)ret_ptr;
+	create->msg.msgtype = MSGBUF_TYPE_FLOW_RING_CREATE;
+	create->msg.ifidx = ifidx;
+	create->msg.request_id = 0;
+	create->tid = brcmf_flowring_tid(msgbuf->flow, flowid);
+	create->flow_ring_id = cpu_to_le16(flowid +
+					   BRCMF_NROF_H2D_COMMON_MSGRINGS);
+	memcpy(create->sa, eh->h_source, ETH_ALEN);
+	memcpy(create->da, eh->h_dest, ETH_ALEN);
+	address = (long long)(long)msgbuf->flowring_dma_handle[flowid];
+	create->flow_ring_addr.high_addr = cpu_to_le32(address >> 32);
+	create->flow_ring_addr.low_addr = cpu_to_le32(address & 0xffffffff);
+	create->max_items = cpu_to_le16(BRCMF_H2D_TXFLOWRING_MAX_ITEM);
+	create->len_item = cpu_to_le16(BRCMF_H2D_TXFLOWRING_ITEMSIZE);
+
+	brcmf_dbg(MSGBUF, "Send Flow Create Req flow ID %d for peer %pM prio %d ifindex %d\n",
+		  flowid, eh->h_dest, create->tid, ifidx);
+
+	err = brcmf_commonring_write_complete(commonring);
+	brcmf_commonring_unlock(commonring);
+	if (err) {
+		brcmf_err("Failed to write commonring\n");
+		brcmf_msgbuf_remove_flowring(msgbuf, flowid);
+		return BRCMF_FLOWRING_INVALID_ID;
+	}
+
+	return flowid;
+}
+
+
+static void brcmf_msgbuf_txflow(struct brcmf_msgbuf *msgbuf, u8 flowid)
+{
+	struct brcmf_flowring *flow = msgbuf->flow;
+	struct brcmf_commonring *commonring;
+	void *ret_ptr;
+	u32 count;
+	struct sk_buff *skb;
+	dma_addr_t physaddr;
+	u32 pktid;
+	struct msgbuf_tx_msghdr *tx_msghdr;
+	long long address;
+
+	commonring = msgbuf->flowrings[flowid];
+	if (!brcmf_commonring_write_available(commonring))
+		return;
+
+	brcmf_commonring_lock(commonring);
+
+	count = BRCMF_MSGBUF_TX_FLUSH_CNT2 - BRCMF_MSGBUF_TX_FLUSH_CNT1;
+	while (brcmf_flowring_qlen(flow, flowid)) {
+		skb = brcmf_flowring_dequeue(flow, flowid);
+		if (skb == NULL) {
+			brcmf_err("No SKB, but qlen %d\n",
+				  brcmf_flowring_qlen(flow, flowid));
+			break;
+		}
+		skb_orphan(skb);
+		if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
+					     msgbuf->tx_pktids, skb, ETH_HLEN,
+					     &physaddr, &pktid)) {
+			brcmf_flowring_reinsert(flow, flowid, skb);
+			brcmf_err("No PKTID available !!\n");
+			break;
+		}
+		ret_ptr = brcmf_commonring_reserve_for_write(commonring);
+		if (!ret_ptr) {
+			brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
+					       msgbuf->tx_pktids, pktid);
+			brcmf_flowring_reinsert(flow, flowid, skb);
+			break;
+		}
+		count++;
+
+		tx_msghdr = (struct msgbuf_tx_msghdr *)ret_ptr;
+
+		tx_msghdr->msg.msgtype = MSGBUF_TYPE_TX_POST;
+		tx_msghdr->msg.request_id = cpu_to_le32(pktid);
+		tx_msghdr->msg.ifidx = brcmf_flowring_ifidx_get(flow, flowid);
+		tx_msghdr->flags = BRCMF_MSGBUF_PKT_FLAGS_FRAME_802_3;
+		tx_msghdr->flags |= (skb->priority & 0x07) <<
+				    BRCMF_MSGBUF_PKT_FLAGS_PRIO_SHIFT;
+		tx_msghdr->seg_cnt = 1;
+		memcpy(tx_msghdr->txhdr, skb->data, ETH_HLEN);
+		tx_msghdr->data_len = cpu_to_le16(skb->len - ETH_HLEN);
+		address = (long long)(long)physaddr;
+		tx_msghdr->data_buf_addr.high_addr = cpu_to_le32(address >> 32);
+		tx_msghdr->data_buf_addr.low_addr =
+			cpu_to_le32(address & 0xffffffff);
+		tx_msghdr->metadata_buf_len = 0;
+		tx_msghdr->metadata_buf_addr.high_addr = 0;
+		tx_msghdr->metadata_buf_addr.low_addr = 0;
+		if (count >= BRCMF_MSGBUF_TX_FLUSH_CNT2) {
+			brcmf_commonring_write_complete(commonring);
+			count = 0;
+		}
+	}
+	if (count)
+		brcmf_commonring_write_complete(commonring);
+	brcmf_commonring_unlock(commonring);
+}
+
+
+static void brcmf_msgbuf_txflow_worker(struct work_struct *worker)
+{
+	struct brcmf_msgbuf *msgbuf;
+	u32 flowid;
+
+	msgbuf = container_of(worker, struct brcmf_msgbuf, txflow_work);
+	for_each_set_bit(flowid, msgbuf->flow_map, msgbuf->nrof_flowrings) {
+		clear_bit(flowid, msgbuf->flow_map);
+		brcmf_msgbuf_txflow(msgbuf, flowid);
+	}
+}
+
+
+static int brcmf_msgbuf_schedule_txdata(struct brcmf_msgbuf *msgbuf, u32 flowid)
+{
+	set_bit(flowid, msgbuf->flow_map);
+	queue_work(msgbuf->txflow_wq, &msgbuf->txflow_work);
+
+	return 0;
+}
+
+
+static int brcmf_msgbuf_txdata(struct brcmf_pub *drvr, int ifidx,
+			       u8 offset, struct sk_buff *skb)
+{
+	struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+	struct brcmf_flowring *flow = msgbuf->flow;
+	struct ethhdr *eh = (struct ethhdr *)(skb->data);
+	u32 flowid;
+
+	flowid = brcmf_flowring_lookup(flow, eh->h_dest, skb->priority, ifidx);
+	if (flowid == BRCMF_FLOWRING_INVALID_ID) {
+		flowid = brcmf_msgbuf_flowring_create(msgbuf, ifidx, skb);
+		if (flowid == BRCMF_FLOWRING_INVALID_ID)
+			return -ENOMEM;
+	}
+	brcmf_flowring_enqueue(flow, flowid, skb);
+	brcmf_msgbuf_schedule_txdata(msgbuf, flowid);
+
+	return 0;
+}
+
+
+static void
+brcmf_msgbuf_configure_addr_mode(struct brcmf_pub *drvr, int ifidx,
+				 enum proto_addr_mode addr_mode)
+{
+	struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+
+	brcmf_flowring_configure_addr_mode(msgbuf->flow, ifidx, addr_mode);
+}
+
+
+static void
+brcmf_msgbuf_delete_peer(struct brcmf_pub *drvr, int ifidx, u8 peer[ETH_ALEN])
+{
+	struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+
+	brcmf_flowring_delete_peer(msgbuf->flow, ifidx, peer);
+}
+
+
+static void
+brcmf_msgbuf_process_ioctl_complete(struct brcmf_msgbuf *msgbuf, void *buf)
+{
+	struct msgbuf_ioctl_resp_hdr *ioctl_resp;
+
+	ioctl_resp = (struct msgbuf_ioctl_resp_hdr *)buf;
+
+	msgbuf->ioctl_resp_status = le16_to_cpu(ioctl_resp->compl_hdr.status);
+	msgbuf->ioctl_resp_ret_len = le16_to_cpu(ioctl_resp->resp_len);
+	msgbuf->ioctl_resp_pktid = le32_to_cpu(ioctl_resp->msg.request_id);
+
+	brcmf_msgbuf_ioctl_resp_wake(msgbuf);
+
+	if (msgbuf->cur_ioctlrespbuf)
+		msgbuf->cur_ioctlrespbuf--;
+	brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf);
+}
+
+
+static void
+brcmf_msgbuf_process_txstatus(struct brcmf_msgbuf *msgbuf, void *buf)
+{
+	struct msgbuf_tx_status *tx_status;
+	u32 idx;
+	struct sk_buff *skb;
+	u16 flowid;
+
+	tx_status = (struct msgbuf_tx_status *)buf;
+	idx = le32_to_cpu(tx_status->msg.request_id);
+	flowid = le16_to_cpu(tx_status->compl_hdr.flow_ring_id);
+	flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
+	skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
+				     msgbuf->tx_pktids, idx);
+	if (!skb) {
+		brcmf_err("Invalid packet id idx recv'd %d\n", idx);
+		return;
+	}
+
+	set_bit(flowid, msgbuf->txstatus_done_map);
+
+	brcmf_txfinalize(msgbuf->drvr, skb, tx_status->msg.ifidx, true);
+}
+
+
+static u32 brcmf_msgbuf_rxbuf_data_post(struct brcmf_msgbuf *msgbuf, u32 count)
+{
+	struct brcmf_commonring *commonring;
+	void *ret_ptr;
+	struct sk_buff *skb;
+	u16 alloced;
+	u32 pktlen;
+	dma_addr_t physaddr;
+	struct msgbuf_rx_bufpost *rx_bufpost;
+	long long address;
+	u32 pktid;
+	u32 i;
+
+	commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_RXPOST_SUBMIT];
+	ret_ptr = brcmf_commonring_reserve_for_write_multiple(commonring,
+							      count,
+							      &alloced);
+	if (!ret_ptr) {
+		brcmf_err("Failed to reserve space in commonring\n");
+		return 0;
+	}
+
+	for (i = 0; i < alloced; i++) {
+		rx_bufpost = (struct msgbuf_rx_bufpost *)ret_ptr;
+		memset(rx_bufpost, 0, sizeof(*rx_bufpost));
+
+		skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_PKT_SIZE);
+
+		if (skb == NULL) {
+			brcmf_err("Failed to alloc SKB\n");
+			brcmf_commonring_write_cancel(commonring, alloced - i);
+			break;
+		}
+
+		pktlen = skb->len;
+		if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
+					     msgbuf->rx_pktids, skb, 0,
+					     &physaddr, &pktid)) {
+			dev_kfree_skb_any(skb);
+			brcmf_err("No PKTID available !!\n");
+			brcmf_commonring_write_cancel(commonring, alloced - i);
+			break;
+		}
+
+		if (msgbuf->rx_metadata_offset) {
+			address = (long long)(long)physaddr;
+			rx_bufpost->metadata_buf_len =
+				cpu_to_le16(msgbuf->rx_metadata_offset);
+			rx_bufpost->metadata_buf_addr.high_addr =
+				cpu_to_le32(address >> 32);
+			rx_bufpost->metadata_buf_addr.low_addr =
+				cpu_to_le32(address & 0xffffffff);
+
+			skb_pull(skb, msgbuf->rx_metadata_offset);
+			pktlen = skb->len;
+			physaddr += msgbuf->rx_metadata_offset;
+		}
+		rx_bufpost->msg.msgtype = MSGBUF_TYPE_RXBUF_POST;
+		rx_bufpost->msg.request_id = cpu_to_le32(pktid);
+
+		address = (long long)(long)physaddr;
+		rx_bufpost->data_buf_len = cpu_to_le16((u16)pktlen);
+		rx_bufpost->data_buf_addr.high_addr =
+			cpu_to_le32(address >> 32);
+		rx_bufpost->data_buf_addr.low_addr =
+			cpu_to_le32(address & 0xffffffff);
+
+		ret_ptr += brcmf_commonring_len_item(commonring);
+	}
+
+	if (i)
+		brcmf_commonring_write_complete(commonring);
+
+	return i;
+}
+
+
+static void
+brcmf_msgbuf_rxbuf_data_fill(struct brcmf_msgbuf *msgbuf)
+{
+	u32 fillbufs;
+	u32 retcount;
+
+	fillbufs = msgbuf->max_rxbufpost - msgbuf->rxbufpost;
+
+	while (fillbufs) {
+		retcount = brcmf_msgbuf_rxbuf_data_post(msgbuf, fillbufs);
+		if (!retcount)
+			break;
+		msgbuf->rxbufpost += retcount;
+		fillbufs -= retcount;
+	}
+}
+
+
+static void
+brcmf_msgbuf_update_rxbufpost_count(struct brcmf_msgbuf *msgbuf, u16 rxcnt)
+{
+	msgbuf->rxbufpost -= rxcnt;
+	if (msgbuf->rxbufpost <= (msgbuf->max_rxbufpost -
+				  BRCMF_MSGBUF_RXBUFPOST_THRESHOLD))
+		brcmf_msgbuf_rxbuf_data_fill(msgbuf);
+}
+
+
+static u32
+brcmf_msgbuf_rxbuf_ctrl_post(struct brcmf_msgbuf *msgbuf, bool event_buf,
+			     u32 count)
+{
+	struct brcmf_commonring *commonring;
+	void *ret_ptr;
+	struct sk_buff *skb;
+	u16 alloced;
+	u32 pktlen;
+	dma_addr_t physaddr;
+	struct msgbuf_rx_ioctl_resp_or_event *rx_bufpost;
+	long long address;
+	u32 pktid;
+	u32 i;
+
+	commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
+	brcmf_commonring_lock(commonring);
+	ret_ptr = brcmf_commonring_reserve_for_write_multiple(commonring,
+							      count,
+							      &alloced);
+	if (!ret_ptr) {
+		brcmf_err("Failed to reserve space in commonring\n");
+		brcmf_commonring_unlock(commonring);
+		return 0;
+	}
+
+	for (i = 0; i < alloced; i++) {
+		rx_bufpost = (struct msgbuf_rx_ioctl_resp_or_event *)ret_ptr;
+		memset(rx_bufpost, 0, sizeof(*rx_bufpost));
+
+		skb = brcmu_pkt_buf_get_skb(BRCMF_MSGBUF_MAX_PKT_SIZE);
+
+		if (skb == NULL) {
+			brcmf_err("Failed to alloc SKB\n");
+			brcmf_commonring_write_cancel(commonring, alloced - i);
+			break;
+		}
+
+		pktlen = skb->len;
+		if (brcmf_msgbuf_alloc_pktid(msgbuf->drvr->bus_if->dev,
+					     msgbuf->rx_pktids, skb, 0,
+					     &physaddr, &pktid)) {
+			dev_kfree_skb_any(skb);
+			brcmf_err("No PKTID available !!\n");
+			brcmf_commonring_write_cancel(commonring, alloced - i);
+			break;
+		}
+		if (event_buf)
+			rx_bufpost->msg.msgtype = MSGBUF_TYPE_EVENT_BUF_POST;
+		else
+			rx_bufpost->msg.msgtype =
+				MSGBUF_TYPE_IOCTLRESP_BUF_POST;
+		rx_bufpost->msg.request_id = cpu_to_le32(pktid);
+
+		address = (long long)(long)physaddr;
+		rx_bufpost->host_buf_len = cpu_to_le16((u16)pktlen);
+		rx_bufpost->host_buf_addr.high_addr =
+			cpu_to_le32(address >> 32);
+		rx_bufpost->host_buf_addr.low_addr =
+			cpu_to_le32(address & 0xffffffff);
+
+		ret_ptr += brcmf_commonring_len_item(commonring);
+	}
+
+	if (i)
+		brcmf_commonring_write_complete(commonring);
+
+	brcmf_commonring_unlock(commonring);
+
+	return i;
+}
+
+
+static void brcmf_msgbuf_rxbuf_ioctlresp_post(struct brcmf_msgbuf *msgbuf)
+{
+	u32 count;
+
+	count = msgbuf->max_ioctlrespbuf - msgbuf->cur_ioctlrespbuf;
+	count = brcmf_msgbuf_rxbuf_ctrl_post(msgbuf, false, count);
+	msgbuf->cur_ioctlrespbuf += count;
+}
+
+
+static void brcmf_msgbuf_rxbuf_event_post(struct brcmf_msgbuf *msgbuf)
+{
+	u32 count;
+
+	count = msgbuf->max_eventbuf - msgbuf->cur_eventbuf;
+	count = brcmf_msgbuf_rxbuf_ctrl_post(msgbuf, true, count);
+	msgbuf->cur_eventbuf += count;
+}
+
+
+static void
+brcmf_msgbuf_rx_skb(struct brcmf_msgbuf *msgbuf, struct sk_buff *skb,
+		    u8 ifidx)
+{
+	struct brcmf_if *ifp;
+
+	ifp = msgbuf->drvr->iflist[ifidx];
+	if (!ifp || !ifp->ndev) {
+		brcmu_pkt_buf_free_skb(skb);
+		return;
+	}
+	brcmf_netif_rx(ifp, skb);
+}
+
+
+static void brcmf_msgbuf_process_event(struct brcmf_msgbuf *msgbuf, void *buf)
+{
+	struct msgbuf_rx_event *event;
+	u32 idx;
+	u16 buflen;
+	struct sk_buff *skb;
+
+	event = (struct msgbuf_rx_event *)buf;
+	idx = le32_to_cpu(event->msg.request_id);
+	buflen = le16_to_cpu(event->event_data_len);
+
+	if (msgbuf->cur_eventbuf)
+		msgbuf->cur_eventbuf--;
+	brcmf_msgbuf_rxbuf_event_post(msgbuf);
+
+	skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
+				     msgbuf->rx_pktids, idx);
+	if (!skb)
+		return;
+
+	if (msgbuf->rx_dataoffset)
+		skb_pull(skb, msgbuf->rx_dataoffset);
+
+	skb_trim(skb, buflen);
+
+	brcmf_msgbuf_rx_skb(msgbuf, skb, event->msg.ifidx);
+}
+
+
+static void
+brcmf_msgbuf_process_rx_complete(struct brcmf_msgbuf *msgbuf, void *buf)
+{
+	struct msgbuf_rx_complete *rx_complete;
+	struct sk_buff *skb;
+	u16 data_offset;
+	u16 buflen;
+	u32 idx;
+
+	brcmf_msgbuf_update_rxbufpost_count(msgbuf, 1);
+
+	rx_complete = (struct msgbuf_rx_complete *)buf;
+	data_offset = le16_to_cpu(rx_complete->data_offset);
+	buflen = le16_to_cpu(rx_complete->data_len);
+	idx = le32_to_cpu(rx_complete->msg.request_id);
+
+	skb = brcmf_msgbuf_get_pktid(msgbuf->drvr->bus_if->dev,
+				     msgbuf->rx_pktids, idx);
+
+	if (data_offset)
+		skb_pull(skb, data_offset);
+	else if (msgbuf->rx_dataoffset)
+		skb_pull(skb, msgbuf->rx_dataoffset);
+
+	skb_trim(skb, buflen);
+
+	brcmf_msgbuf_rx_skb(msgbuf, skb, rx_complete->msg.ifidx);
+}
+
+
+static void
+brcmf_msgbuf_process_flow_ring_create_response(struct brcmf_msgbuf *msgbuf,
+					       void *buf)
+{
+	struct msgbuf_flowring_create_resp *flowring_create_resp;
+	u16 status;
+	u16 flowid;
+
+	flowring_create_resp = (struct msgbuf_flowring_create_resp *)buf;
+
+	flowid = le16_to_cpu(flowring_create_resp->compl_hdr.flow_ring_id);
+	flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
+	status =  le16_to_cpu(flowring_create_resp->compl_hdr.status);
+
+	if (status) {
+		brcmf_err("Flowring creation failed, code %d\n", status);
+		brcmf_msgbuf_remove_flowring(msgbuf, flowid);
+		return;
+	}
+	brcmf_dbg(MSGBUF, "Flowring %d Create response status %d\n", flowid,
+		  status);
+
+	brcmf_flowring_open(msgbuf->flow, flowid);
+
+	brcmf_msgbuf_schedule_txdata(msgbuf, flowid);
+}
+
+
+static void
+brcmf_msgbuf_process_flow_ring_delete_response(struct brcmf_msgbuf *msgbuf,
+					       void *buf)
+{
+	struct msgbuf_flowring_delete_resp *flowring_delete_resp;
+	u16 status;
+	u16 flowid;
+
+	flowring_delete_resp = (struct msgbuf_flowring_delete_resp *)buf;
+
+	flowid = le16_to_cpu(flowring_delete_resp->compl_hdr.flow_ring_id);
+	flowid -= BRCMF_NROF_H2D_COMMON_MSGRINGS;
+	status =  le16_to_cpu(flowring_delete_resp->compl_hdr.status);
+
+	if (status) {
+		brcmf_err("Flowring deletion failed, code %d\n", status);
+		brcmf_flowring_delete(msgbuf->flow, flowid);
+		return;
+	}
+	brcmf_dbg(MSGBUF, "Flowring %d Delete response status %d\n", flowid,
+		  status);
+
+	brcmf_msgbuf_remove_flowring(msgbuf, flowid);
+}
+
+
+static void brcmf_msgbuf_process_msgtype(struct brcmf_msgbuf *msgbuf, void *buf)
+{
+	struct msgbuf_common_hdr *msg;
+
+	msg = (struct msgbuf_common_hdr *)buf;
+	switch (msg->msgtype) {
+	case MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT:
+		brcmf_dbg(MSGBUF, "MSGBUF_TYPE_FLOW_RING_CREATE_CMPLT\n");
+		brcmf_msgbuf_process_flow_ring_create_response(msgbuf, buf);
+		break;
+	case MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT:
+		brcmf_dbg(MSGBUF, "MSGBUF_TYPE_FLOW_RING_DELETE_CMPLT\n");
+		brcmf_msgbuf_process_flow_ring_delete_response(msgbuf, buf);
+		break;
+	case MSGBUF_TYPE_IOCTLPTR_REQ_ACK:
+		brcmf_dbg(MSGBUF, "MSGBUF_TYPE_IOCTLPTR_REQ_ACK\n");
+		break;
+	case MSGBUF_TYPE_IOCTL_CMPLT:
+		brcmf_dbg(MSGBUF, "MSGBUF_TYPE_IOCTL_CMPLT\n");
+		brcmf_msgbuf_process_ioctl_complete(msgbuf, buf);
+		break;
+	case MSGBUF_TYPE_WL_EVENT:
+		brcmf_dbg(MSGBUF, "MSGBUF_TYPE_WL_EVENT\n");
+		brcmf_msgbuf_process_event(msgbuf, buf);
+		break;
+	case MSGBUF_TYPE_TX_STATUS:
+		brcmf_dbg(MSGBUF, "MSGBUF_TYPE_TX_STATUS\n");
+		brcmf_msgbuf_process_txstatus(msgbuf, buf);
+		break;
+	case MSGBUF_TYPE_RX_CMPLT:
+		brcmf_dbg(MSGBUF, "MSGBUF_TYPE_RX_CMPLT\n");
+		brcmf_msgbuf_process_rx_complete(msgbuf, buf);
+		break;
+	default:
+		brcmf_err("Unsupported msgtype %d\n", msg->msgtype);
+		break;
+	}
+}
+
+
+static void brcmf_msgbuf_process_rx(struct brcmf_msgbuf *msgbuf,
+				    struct brcmf_commonring *commonring)
+{
+	void *buf;
+	u16 count;
+
+again:
+	buf = brcmf_commonring_get_read_ptr(commonring, &count);
+	if (buf == NULL)
+		return;
+
+	while (count) {
+		brcmf_msgbuf_process_msgtype(msgbuf,
+					     buf + msgbuf->rx_dataoffset);
+		buf += brcmf_commonring_len_item(commonring);
+		count--;
+	}
+	brcmf_commonring_read_complete(commonring);
+
+	if (commonring->r_ptr == 0)
+		goto again;
+}
+
+
+int brcmf_proto_msgbuf_rx_trigger(struct device *dev)
+{
+	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
+	struct brcmf_pub *drvr = bus_if->drvr;
+	struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+	void *buf;
+	u32 flowid;
+
+	buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
+	brcmf_msgbuf_process_rx(msgbuf, buf);
+	buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_TX_COMPLETE];
+	brcmf_msgbuf_process_rx(msgbuf, buf);
+	buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_CONTROL_COMPLETE];
+	brcmf_msgbuf_process_rx(msgbuf, buf);
+
+	for_each_set_bit(flowid, msgbuf->txstatus_done_map,
+			 msgbuf->nrof_flowrings) {
+		clear_bit(flowid, msgbuf->txstatus_done_map);
+		if (brcmf_flowring_qlen(msgbuf->flow, flowid))
+			brcmf_msgbuf_schedule_txdata(msgbuf, flowid);
+	}
+
+	return 0;
+}
+
+
+void brcmf_msgbuf_delete_flowring(struct brcmf_pub *drvr, u8 flowid)
+{
+	struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+	struct msgbuf_tx_flowring_delete_req *delete;
+	struct brcmf_commonring *commonring;
+	void *ret_ptr;
+	u8 ifidx;
+	int err;
+
+	commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
+	brcmf_commonring_lock(commonring);
+	ret_ptr = brcmf_commonring_reserve_for_write(commonring);
+	if (!ret_ptr) {
+		brcmf_err("FW unaware, flowring will be removed !!\n");
+		brcmf_commonring_unlock(commonring);
+		brcmf_msgbuf_remove_flowring(msgbuf, flowid);
+		return;
+	}
+
+	delete = (struct msgbuf_tx_flowring_delete_req *)ret_ptr;
+
+	ifidx = brcmf_flowring_ifidx_get(msgbuf->flow, flowid);
+
+	delete->msg.msgtype = MSGBUF_TYPE_FLOW_RING_DELETE;
+	delete->msg.ifidx = ifidx;
+	delete->msg.request_id = 0;
+
+	delete->flow_ring_id = cpu_to_le16(flowid +
+					   BRCMF_NROF_H2D_COMMON_MSGRINGS);
+	delete->reason = 0;
+
+	brcmf_dbg(MSGBUF, "Send Flow Delete Req flow ID %d, ifindex %d\n",
+		  flowid, ifidx);
+
+	err = brcmf_commonring_write_complete(commonring);
+	brcmf_commonring_unlock(commonring);
+	if (err) {
+		brcmf_err("Failed to submit RING_DELETE, flowring will be removed\n");
+		brcmf_msgbuf_remove_flowring(msgbuf, flowid);
+	}
+}
+
+
+int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr)
+{
+	struct brcmf_bus_msgbuf *if_msgbuf;
+	struct brcmf_msgbuf *msgbuf;
+	long long address;
+	u32 count;
+
+	if_msgbuf = drvr->bus_if->msgbuf;
+	msgbuf = kzalloc(sizeof(*msgbuf), GFP_ATOMIC);
+	if (!msgbuf)
+		goto fail;
+
+	msgbuf->txflow_wq = create_singlethread_workqueue("msgbuf_txflow");
+	if (msgbuf->txflow_wq == NULL) {
+		brcmf_err("workqueue creation failed\n");
+		goto fail;
+	}
+	INIT_WORK(&msgbuf->txflow_work, brcmf_msgbuf_txflow_worker);
+	count = BITS_TO_LONGS(if_msgbuf->nrof_flowrings);
+	msgbuf->flow_map = kzalloc(count, GFP_ATOMIC);
+	if (!msgbuf->flow_map)
+		goto fail;
+
+	msgbuf->txstatus_done_map = kzalloc(count, GFP_ATOMIC);
+	if (!msgbuf->txstatus_done_map)
+		goto fail;
+
+	msgbuf->drvr = drvr;
+	msgbuf->ioctbuf = dma_alloc_coherent(drvr->bus_if->dev,
+					     BRCMF_TX_IOCTL_MAX_MSG_SIZE,
+					     &msgbuf->ioctbuf_handle,
+					     GFP_ATOMIC);
+	if (!msgbuf->ioctbuf)
+		goto fail;
+	address = (long long)(long)msgbuf->ioctbuf_handle;
+	msgbuf->ioctbuf_phys_hi = address >> 32;
+	msgbuf->ioctbuf_phys_lo = address & 0xffffffff;
+
+	drvr->proto->hdrpull = brcmf_msgbuf_hdrpull;
+	drvr->proto->query_dcmd = brcmf_msgbuf_query_dcmd;
+	drvr->proto->set_dcmd = brcmf_msgbuf_set_dcmd;
+	drvr->proto->txdata = brcmf_msgbuf_txdata;
+	drvr->proto->configure_addr_mode = brcmf_msgbuf_configure_addr_mode;
+	drvr->proto->delete_peer = brcmf_msgbuf_delete_peer;
+	drvr->proto->pd = msgbuf;
+
+	init_waitqueue_head(&msgbuf->ioctl_resp_wait);
+
+	msgbuf->commonrings =
+		(struct brcmf_commonring **)if_msgbuf->commonrings;
+	msgbuf->flowrings = (struct brcmf_commonring **)if_msgbuf->flowrings;
+	msgbuf->nrof_flowrings = if_msgbuf->nrof_flowrings;
+	msgbuf->flowring_dma_handle = kzalloc(msgbuf->nrof_flowrings *
+		sizeof(*msgbuf->flowring_dma_handle), GFP_ATOMIC);
+
+	msgbuf->rx_dataoffset = if_msgbuf->rx_dataoffset;
+	msgbuf->max_rxbufpost = if_msgbuf->max_rxbufpost;
+
+	msgbuf->max_ioctlrespbuf = BRCMF_MSGBUF_MAX_IOCTLRESPBUF_POST;
+	msgbuf->max_eventbuf = BRCMF_MSGBUF_MAX_EVENTBUF_POST;
+
+	msgbuf->tx_pktids = brcmf_msgbuf_init_pktids(NR_TX_PKTIDS,
+						     DMA_TO_DEVICE);
+	if (!msgbuf->tx_pktids)
+		goto fail;
+	msgbuf->rx_pktids = brcmf_msgbuf_init_pktids(NR_RX_PKTIDS,
+						     DMA_FROM_DEVICE);
+	if (!msgbuf->rx_pktids)
+		goto fail;
+
+	msgbuf->flow = brcmf_flowring_attach(drvr->bus_if->dev,
+					     if_msgbuf->nrof_flowrings);
+	if (!msgbuf->flow)
+		goto fail;
+
+
+	brcmf_dbg(MSGBUF, "Feeding buffers, rx data %d, rx event %d, rx ioctl resp %d\n",
+		  msgbuf->max_rxbufpost, msgbuf->max_eventbuf,
+		  msgbuf->max_ioctlrespbuf);
+	count = 0;
+	do {
+		brcmf_msgbuf_rxbuf_data_fill(msgbuf);
+		if (msgbuf->max_rxbufpost != msgbuf->rxbufpost)
+			msleep(10);
+		else
+			break;
+		count++;
+	} while (count < 10);
+	brcmf_msgbuf_rxbuf_event_post(msgbuf);
+	brcmf_msgbuf_rxbuf_ioctlresp_post(msgbuf);
+
+	return 0;
+
+fail:
+	if (msgbuf) {
+		kfree(msgbuf->flow_map);
+		kfree(msgbuf->txstatus_done_map);
+		brcmf_msgbuf_release_pktids(msgbuf);
+		if (msgbuf->ioctbuf)
+			dma_free_coherent(drvr->bus_if->dev,
+					  BRCMF_TX_IOCTL_MAX_MSG_SIZE,
+					  msgbuf->ioctbuf,
+					  msgbuf->ioctbuf_handle);
+		kfree(msgbuf);
+	}
+	return -ENOMEM;
+}
+
+
+void brcmf_proto_msgbuf_detach(struct brcmf_pub *drvr)
+{
+	struct brcmf_msgbuf *msgbuf;
+
+	brcmf_dbg(TRACE, "Enter\n");
+	if (drvr->proto->pd) {
+		msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+
+		kfree(msgbuf->flow_map);
+		kfree(msgbuf->txstatus_done_map);
+		if (msgbuf->txflow_wq)
+			destroy_workqueue(msgbuf->txflow_wq);
+
+		brcmf_flowring_detach(msgbuf->flow);
+		dma_free_coherent(drvr->bus_if->dev,
+				  BRCMF_TX_IOCTL_MAX_MSG_SIZE,
+				  msgbuf->ioctbuf, msgbuf->ioctbuf_handle);
+		brcmf_msgbuf_release_pktids(msgbuf);
+		kfree(msgbuf);
+		drvr->proto->pd = NULL;
+	}
+}