iwmc3200wifi: Add new Intel Wireless Multicomm 802.11 driver

This driver supports Intel's full MAC wireless multicomm 802.11 hardware.
Although the hardware is a 802.11agn device, we currently only support
802.11ag, in managed and ad-hoc mode (no AP mode for now).

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1431 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwmc3200wifi/rx.c b/drivers/net/wireless/iwmc3200wifi/rx.c
new file mode 100644
index 00000000000..d73cf96c6dc
--- /dev/null
+++ b/drivers/net/wireless/iwmc3200wifi/rx.c
@@ -0,0 +1,1431 @@
+/*
+ * Intel Wireless Multicomm 3200 WiFi driver
+ *
+ * Copyright (C) 2009 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <ilw@linux.intel.com>
+ * Samuel Ortiz <samuel.ortiz@intel.com>
+ * Zhu Yi <yi.zhu@intel.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/wireless.h>
+#include <linux/ieee80211.h>
+#include <linux/if_arp.h>
+#include <linux/list.h>
+#include <net/iw_handler.h>
+
+#include "iwm.h"
+#include "debug.h"
+#include "hal.h"
+#include "umac.h"
+#include "lmac.h"
+#include "commands.h"
+#include "rx.h"
+#include "cfg80211.h"
+#include "eeprom.h"
+
+static int iwm_rx_check_udma_hdr(struct iwm_udma_in_hdr *hdr)
+{
+	if ((le32_to_cpu(hdr->cmd) == UMAC_PAD_TERMINAL) ||
+	    (le32_to_cpu(hdr->size) == UMAC_PAD_TERMINAL))
+		return -EINVAL;
+
+	return 0;
+}
+
+static inline int iwm_rx_resp_size(struct iwm_udma_in_hdr *hdr)
+{
+	return ALIGN(le32_to_cpu(hdr->size) + sizeof(struct iwm_udma_in_hdr),
+		     16);
+}
+
+/*
+ * Notification handlers:
+ *
+ * For every possible notification we can receive from the
+ * target, we have a handler.
+ * When we get a target notification, and there is no one
+ * waiting for it, it's just processed through the rx code
+ * path:
+ *
+ * iwm_rx_handle()
+ *  -> iwm_rx_handle_umac()
+ *      -> iwm_rx_handle_wifi()
+ *          -> iwm_rx_handle_resp()
+ *              -> iwm_ntf_*()
+ *
+ *      OR
+ *
+ *      -> iwm_rx_handle_non_wifi()
+ *
+ * If there are processes waiting for this notification, then
+ * iwm_rx_handle_wifi() just wakes those processes up and they
+ * grab the pending notification.
+ */
+static int iwm_ntf_error(struct iwm_priv *iwm, u8 *buf,
+			 unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_error *error;
+	struct iwm_fw_error_hdr *fw_err;
+
+	error = (struct iwm_umac_notif_error *)buf;
+	fw_err = &error->err;
+
+
+	IWM_ERR(iwm, "%cMAC FW ERROR:\n",
+	 (le32_to_cpu(fw_err->category) == UMAC_SYS_ERR_CAT_LMAC) ? 'L' : 'U');
+	IWM_ERR(iwm, "\tCategory:    %d\n", le32_to_cpu(fw_err->category));
+	IWM_ERR(iwm, "\tStatus:      0x%x\n", le32_to_cpu(fw_err->status));
+	IWM_ERR(iwm, "\tPC:          0x%x\n", le32_to_cpu(fw_err->pc));
+	IWM_ERR(iwm, "\tblink1:      %d\n", le32_to_cpu(fw_err->blink1));
+	IWM_ERR(iwm, "\tblink2:      %d\n", le32_to_cpu(fw_err->blink2));
+	IWM_ERR(iwm, "\tilink1:      %d\n", le32_to_cpu(fw_err->ilink1));
+	IWM_ERR(iwm, "\tilink2:      %d\n", le32_to_cpu(fw_err->ilink2));
+	IWM_ERR(iwm, "\tData1:       0x%x\n", le32_to_cpu(fw_err->data1));
+	IWM_ERR(iwm, "\tData2:       0x%x\n", le32_to_cpu(fw_err->data2));
+	IWM_ERR(iwm, "\tLine number: %d\n", le32_to_cpu(fw_err->line_num));
+	IWM_ERR(iwm, "\tUMAC status: 0x%x\n", le32_to_cpu(fw_err->umac_status));
+	IWM_ERR(iwm, "\tLMAC status: 0x%x\n", le32_to_cpu(fw_err->lmac_status));
+	IWM_ERR(iwm, "\tSDIO status: 0x%x\n", le32_to_cpu(fw_err->sdio_status));
+
+	return 0;
+}
+
+static int iwm_ntf_umac_alive(struct iwm_priv *iwm, u8 *buf,
+			      unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_alive *alive_resp =
+			(struct iwm_umac_notif_alive *)(buf);
+	u16 status = le16_to_cpu(alive_resp->status);
+
+	if (status == UMAC_NTFY_ALIVE_STATUS_ERR) {
+		IWM_ERR(iwm, "Receive error UMAC_ALIVE\n");
+		return -EIO;
+	}
+
+	iwm_tx_credit_init_pools(iwm, alive_resp);
+
+	return 0;
+}
+
+static int iwm_ntf_init_complete(struct iwm_priv *iwm, u8 *buf,
+				 unsigned long buf_size,
+				 struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_init_complete *init_complete =
+			(struct iwm_umac_notif_init_complete *)(buf);
+	u16 status = le16_to_cpu(init_complete->status);
+
+	if (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR) {
+		IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n");
+		set_bit(IWM_RADIO_RFKILL_HW, &iwm->radio);
+	} else {
+		IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n");
+		clear_bit(IWM_RADIO_RFKILL_HW, &iwm->radio);
+	}
+
+	return 0;
+}
+
+static int iwm_ntf_tx_credit_update(struct iwm_priv *iwm, u8 *buf,
+				    unsigned long buf_size,
+				    struct iwm_wifi_cmd *cmd)
+{
+	int pool_nr, total_freed_pages;
+	unsigned long pool_map;
+	int i, id;
+	struct iwm_umac_notif_page_dealloc *dealloc =
+			(struct iwm_umac_notif_page_dealloc *)buf;
+
+	pool_nr = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_CNT);
+	pool_map = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_MSK);
+
+	IWM_DBG_TX(iwm, DBG, "UMAC dealloc notification: pool nr %d, "
+		   "update map 0x%lx\n", pool_nr, pool_map);
+
+	spin_lock(&iwm->tx_credit.lock);
+
+	for (i = 0; i < pool_nr; i++) {
+		id = GET_VAL32(dealloc->grp_info[i],
+			       UMAC_DEALLOC_NTFY_GROUP_NUM);
+		if (test_bit(id, &pool_map)) {
+			total_freed_pages = GET_VAL32(dealloc->grp_info[i],
+					      UMAC_DEALLOC_NTFY_PAGE_CNT);
+			iwm_tx_credit_inc(iwm, id, total_freed_pages);
+		}
+	}
+
+	spin_unlock(&iwm->tx_credit.lock);
+
+	return 0;
+}
+
+static int iwm_ntf_umac_reset(struct iwm_priv *iwm, u8 *buf,
+			      unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	IWM_DBG_NTF(iwm, DBG, "UMAC RESET done\n");
+
+	return 0;
+}
+
+static int iwm_ntf_lmac_version(struct iwm_priv *iwm, u8 *buf,
+				unsigned long buf_size,
+				struct iwm_wifi_cmd *cmd)
+{
+	IWM_DBG_NTF(iwm, INFO, "LMAC Version: %x.%x\n", buf[9], buf[8]);
+
+	return 0;
+}
+
+static int iwm_ntf_tx(struct iwm_priv *iwm, u8 *buf,
+		      unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_lmac_tx_resp *tx_resp;
+	struct iwm_umac_wifi_in_hdr *hdr;
+
+	tx_resp = (struct iwm_lmac_tx_resp *)
+		(buf + sizeof(struct iwm_umac_wifi_in_hdr));
+	hdr = (struct iwm_umac_wifi_in_hdr *)buf;
+
+	IWM_DBG_NTF(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size);
+
+	IWM_DBG_NTF(iwm, DBG, "Seqnum: %d\n",
+		    le16_to_cpu(hdr->sw_hdr.cmd.seq_num));
+	IWM_DBG_NTF(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt);
+	IWM_DBG_NTF(iwm, DBG, "\tRetry cnt: %d\n",
+		    le16_to_cpu(tx_resp->retry_cnt));
+	IWM_DBG_NTF(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl));
+	IWM_DBG_NTF(iwm, DBG, "\tByte cnt: %d\n",
+		    le16_to_cpu(tx_resp->byte_cnt));
+	IWM_DBG_NTF(iwm, DBG, "\tStatus: 0x%x\n", le32_to_cpu(tx_resp->status));
+
+	return 0;
+}
+
+
+static int iwm_ntf_calib_res(struct iwm_priv *iwm, u8 *buf,
+			     unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	u8 opcode;
+	u8 *calib_buf;
+	struct iwm_lmac_calib_hdr *hdr = (struct iwm_lmac_calib_hdr *)
+				(buf + sizeof(struct iwm_umac_wifi_in_hdr));
+
+	opcode = hdr->opcode;
+
+	BUG_ON(opcode >= CALIBRATION_CMD_NUM ||
+	       opcode < PHY_CALIBRATE_OPCODES_NUM);
+
+	IWM_DBG_NTF(iwm, DBG, "Store calibration result for opcode: %d\n",
+		    opcode);
+
+	buf_size -= sizeof(struct iwm_umac_wifi_in_hdr);
+	calib_buf = iwm->calib_res[opcode].buf;
+
+	if (!calib_buf || (iwm->calib_res[opcode].size < buf_size)) {
+		kfree(calib_buf);
+		calib_buf = kzalloc(buf_size, GFP_KERNEL);
+		if (!calib_buf) {
+			IWM_ERR(iwm, "Memory allocation failed: calib_res\n");
+			return -ENOMEM;
+		}
+		iwm->calib_res[opcode].buf = calib_buf;
+		iwm->calib_res[opcode].size = buf_size;
+	}
+
+	memcpy(calib_buf, hdr, buf_size);
+	set_bit(opcode - PHY_CALIBRATE_OPCODES_NUM, &iwm->calib_done_map);
+
+	return 0;
+}
+
+static int iwm_ntf_calib_complete(struct iwm_priv *iwm, u8 *buf,
+				  unsigned long buf_size,
+				  struct iwm_wifi_cmd *cmd)
+{
+	IWM_DBG_NTF(iwm, DBG, "Calibration completed\n");
+
+	return 0;
+}
+
+static int iwm_ntf_calib_cfg(struct iwm_priv *iwm, u8 *buf,
+			     unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_lmac_cal_cfg_resp *cal_resp;
+
+	cal_resp = (struct iwm_lmac_cal_cfg_resp *)
+			(buf + sizeof(struct iwm_umac_wifi_in_hdr));
+
+	IWM_DBG_NTF(iwm, DBG, "Calibration CFG command status: %d\n",
+		    le32_to_cpu(cal_resp->status));
+
+	return 0;
+}
+
+static int iwm_ntf_wifi_status(struct iwm_priv *iwm, u8 *buf,
+			       unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_wifi_status *status =
+		(struct iwm_umac_notif_wifi_status *)buf;
+
+	iwm->core_enabled |= le16_to_cpu(status->status);
+
+	return 0;
+}
+
+static struct iwm_rx_ticket_node *
+iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket)
+{
+	struct iwm_rx_ticket_node *ticket_node;
+
+	ticket_node = kzalloc(sizeof(struct iwm_rx_ticket_node), GFP_KERNEL);
+	if (!ticket_node) {
+		IWM_ERR(iwm, "Couldn't allocate ticket node\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL);
+	if (!ticket_node->ticket) {
+		IWM_ERR(iwm, "Couldn't allocate RX ticket\n");
+		kfree(ticket_node);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket));
+	INIT_LIST_HEAD(&ticket_node->node);
+
+	return ticket_node;
+}
+
+static void iwm_rx_ticket_node_free(struct iwm_rx_ticket_node *ticket_node)
+{
+	kfree(ticket_node->ticket);
+	kfree(ticket_node);
+}
+
+static struct iwm_rx_packet *iwm_rx_packet_get(struct iwm_priv *iwm, u16 id)
+{
+	u8 id_hash = IWM_RX_ID_GET_HASH(id);
+	struct list_head *packet_list;
+	struct iwm_rx_packet *packet, *next;
+
+	packet_list = &iwm->rx_packets[id_hash];
+
+	list_for_each_entry_safe(packet, next, packet_list, node)
+		if (packet->id == id)
+			return packet;
+
+	return NULL;
+}
+
+static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf,
+						 u32 size, u16 id)
+{
+	struct iwm_rx_packet *packet;
+
+	packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL);
+	if (!packet) {
+		IWM_ERR(iwm, "Couldn't allocate packet\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	packet->skb = dev_alloc_skb(size);
+	if (!packet->skb) {
+		IWM_ERR(iwm, "Couldn't allocate packet SKB\n");
+		kfree(packet);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	packet->pkt_size = size;
+
+	skb_put(packet->skb, size);
+	memcpy(packet->skb->data, buf, size);
+	INIT_LIST_HEAD(&packet->node);
+	packet->id = id;
+
+	return packet;
+}
+
+void iwm_rx_free(struct iwm_priv *iwm)
+{
+	struct iwm_rx_ticket_node *ticket, *nt;
+	struct iwm_rx_packet *packet, *np;
+	int i;
+
+	list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
+		list_del(&ticket->node);
+		iwm_rx_ticket_node_free(ticket);
+	}
+
+	for (i = 0; i < IWM_RX_ID_HASH; i++) {
+		list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
+					 node) {
+			list_del(&packet->node);
+			kfree_skb(packet->skb);
+			kfree(packet);
+		}
+	}
+}
+
+static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf,
+			     unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_rx_ticket *ntf_rx_ticket =
+		(struct iwm_umac_notif_rx_ticket *)buf;
+	struct iwm_rx_ticket *ticket =
+		(struct iwm_rx_ticket *)ntf_rx_ticket->tickets;
+	int i, schedule_rx = 0;
+
+	for (i = 0; i < ntf_rx_ticket->num_tickets; i++) {
+		struct iwm_rx_ticket_node *ticket_node;
+
+		switch (le16_to_cpu(ticket->action)) {
+		case IWM_RX_TICKET_RELEASE:
+		case IWM_RX_TICKET_DROP:
+			/* We can push the packet to the stack */
+			ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket);
+			if (IS_ERR(ticket_node))
+				return PTR_ERR(ticket_node);
+
+			IWM_DBG_NTF(iwm, DBG, "TICKET RELEASE(%d)\n",
+				    ticket->id);
+			list_add_tail(&ticket_node->node, &iwm->rx_tickets);
+
+			/*
+			 * We received an Rx ticket, most likely there's
+			 * a packet pending for it, it's not worth going
+			 * through the packet hash list to double check.
+			 * Let's just fire the rx worker..
+			 */
+			schedule_rx = 1;
+
+			break;
+
+		default:
+			IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n",
+				ticket->action);
+		}
+
+		ticket++;
+	}
+
+	if (schedule_rx)
+		queue_work(iwm->rx_wq, &iwm->rx_worker);
+
+	return 0;
+}
+
+static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf,
+			     unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_wifi_in_hdr *wifi_hdr;
+	struct iwm_rx_packet *packet;
+	u16 id, buf_offset;
+	u32 packet_size;
+
+	IWM_DBG_NTF(iwm, DBG, "\n");
+
+	wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
+	id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
+	buf_offset = sizeof(struct iwm_umac_wifi_in_hdr);
+	packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr);
+
+	IWM_DBG_NTF(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n",
+		    wifi_hdr->sw_hdr.cmd.cmd, id, packet_size);
+	IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id);
+	IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size);
+
+	packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id);
+	if (IS_ERR(packet))
+		return PTR_ERR(packet);
+
+	list_add_tail(&packet->node, &iwm->rx_packets[IWM_RX_ID_GET_HASH(id)]);
+
+	/* We might (unlikely) have received the packet _after_ the ticket */
+	queue_work(iwm->rx_wq, &iwm->rx_worker);
+
+	return 0;
+}
+
+/* MLME handlers */
+static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf,
+				unsigned long buf_size,
+				struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_assoc_start *start;
+
+	start = (struct iwm_umac_notif_assoc_start *)buf;
+
+	set_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
+
+	IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n",
+		     start->bssid, le32_to_cpu(start->roam_reason));
+
+	wake_up_interruptible(&iwm->mlme_queue);
+
+	return 0;
+}
+
+static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
+				   unsigned long buf_size,
+				   struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_assoc_complete *complete =
+		(struct iwm_umac_notif_assoc_complete *)buf;
+	union iwreq_data wrqu;
+
+	IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n",
+		     complete->bssid, complete->status);
+
+	memset(&wrqu, 0, sizeof(wrqu));
+
+	clear_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
+
+	switch (le32_to_cpu(complete->status)) {
+	case UMAC_ASSOC_COMPLETE_SUCCESS:
+		set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
+		memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
+		iwm->channel = complete->channel;
+
+		iwm_link_on(iwm);
+
+		memcpy(wrqu.ap_addr.sa_data, complete->bssid, ETH_ALEN);
+		break;
+	case UMAC_ASSOC_COMPLETE_FAILURE:
+		clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
+		memset(iwm->bssid, 0, ETH_ALEN);
+		iwm->channel = 0;
+
+		iwm_link_off(iwm);
+	default:
+		break;
+	}
+
+	if (iwm->conf.mode == UMAC_MODE_IBSS) {
+		cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
+		return 0;
+	}
+
+	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
+	wireless_send_event(iwm_to_ndev(iwm), SIOCGIWAP, &wrqu, NULL);
+
+	return 0;
+}
+
+static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf,
+				       unsigned long buf_size,
+				       struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_profile_invalidate *invalid;
+
+	invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
+
+	IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n",
+		     le32_to_cpu(invalid->reason));
+
+	clear_bit(IWM_STATUS_ASSOCIATING, &iwm->status);
+	clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
+
+	iwm->umac_profile_active = 0;
+	memset(iwm->bssid, 0, ETH_ALEN);
+	iwm->channel = 0;
+
+	iwm_link_off(iwm);
+
+	wake_up_interruptible(&iwm->mlme_queue);
+
+	return 0;
+}
+
+static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf,
+				  unsigned long buf_size,
+				  struct iwm_wifi_cmd *cmd)
+{
+	int ret;
+	struct iwm_umac_notif_scan_complete *scan_complete =
+		(struct iwm_umac_notif_scan_complete *)buf;
+	u32 result = le32_to_cpu(scan_complete->result);
+
+	IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n",
+		     le32_to_cpu(scan_complete->type),
+		     le32_to_cpu(scan_complete->result),
+		     scan_complete->seq_num);
+
+	if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) {
+		IWM_ERR(iwm, "Scan complete while device not scanning\n");
+		return -EIO;
+	}
+	if (!iwm->scan_request)
+		return 0;
+
+	ret = iwm_cfg80211_inform_bss(iwm);
+
+	cfg80211_scan_done(iwm->scan_request,
+			   (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret);
+	iwm->scan_request = NULL;
+
+	return ret;
+}
+
+static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf,
+				     unsigned long buf_size,
+				     struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_sta_info *umac_sta =
+			(struct iwm_umac_notif_sta_info *)buf;
+	struct iwm_sta_info *sta;
+	int i;
+
+	switch (le32_to_cpu(umac_sta->opcode)) {
+	case UMAC_OPCODE_ADD_MODIFY:
+		sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
+
+		IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, "
+			     "addr = %pM, qos = %d\n",
+			     sta->valid ? "Modify" : "Add",
+			     GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
+			     GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
+			     umac_sta->mac_addr,
+			     umac_sta->flags & UMAC_STA_FLAG_QOS);
+
+		sta->valid = 1;
+		sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS;
+		sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR);
+		memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN);
+		break;
+	case UMAC_OPCODE_REMOVE:
+		IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, "
+			     "addr = %pM\n",
+			     GET_VAL8(umac_sta->sta_id, LMAC_STA_ID),
+			     GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR),
+			     umac_sta->mac_addr);
+
+		sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)];
+
+		if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN))
+			sta->valid = 0;
+
+		break;
+	case UMAC_OPCODE_CLEAR_ALL:
+		for (i = 0; i < IWM_STA_TABLE_NUM; i++)
+			iwm->sta_table[i].valid = 0;
+
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf,
+				     unsigned long buf_size,
+				     struct iwm_wifi_cmd *cmd)
+{
+	struct wiphy *wiphy = iwm_to_wiphy(iwm);
+	struct ieee80211_mgmt *mgmt;
+	struct iwm_umac_notif_bss_info *umac_bss =
+			(struct iwm_umac_notif_bss_info *)buf;
+	struct ieee80211_channel *channel;
+	struct ieee80211_supported_band *band;
+	struct iwm_bss_info *bss, *next;
+	s32 signal;
+	int freq;
+	u16 frame_len = le16_to_cpu(umac_bss->frame_len);
+	size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len;
+
+	mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf);
+
+	IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid);
+	IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type));
+	IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n",
+		     le32_to_cpu(umac_bss->timestamp));
+	IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n",
+		     le16_to_cpu(umac_bss->table_idx));
+	IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band);
+	IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel);
+	IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi);
+	IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len);
+
+	list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
+		if (bss->bss->table_idx == umac_bss->table_idx)
+			break;
+
+	if (&bss->node != &iwm->bss_list) {
+		/* Remove the old BSS entry, we will add it back later. */
+		list_del(&bss->node);
+		kfree(bss->bss);
+	} else {
+		/* New BSS entry */
+
+		bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL);
+		if (!bss) {
+			IWM_ERR(iwm, "Couldn't allocate bss_info\n");
+			return -ENOMEM;
+		}
+	}
+
+	bss->bss = kzalloc(bss_len, GFP_KERNEL);
+	if (!bss) {
+		kfree(bss);
+		IWM_ERR(iwm, "Couldn't allocate bss\n");
+		return -ENOMEM;
+	}
+
+	INIT_LIST_HEAD(&bss->node);
+	memcpy(bss->bss, umac_bss, bss_len);
+
+	if (umac_bss->band == UMAC_BAND_2GHZ)
+		band = wiphy->bands[IEEE80211_BAND_2GHZ];
+	else if (umac_bss->band == UMAC_BAND_5GHZ)
+		band = wiphy->bands[IEEE80211_BAND_5GHZ];
+	else {
+		IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band);
+		goto err;
+	}
+
+	freq = ieee80211_channel_to_frequency(umac_bss->channel);
+	channel = ieee80211_get_channel(wiphy, freq);
+	signal = umac_bss->rssi * 100;
+
+	bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel,
+						 mgmt, frame_len,
+						 signal, GFP_KERNEL);
+	if (!bss->cfg_bss)
+		goto err;
+
+	list_add_tail(&bss->node, &iwm->bss_list);
+
+	return 0;
+ err:
+	kfree(bss->bss);
+	kfree(bss);
+
+	return -EINVAL;
+}
+
+static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf,
+			       unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_bss_removed *bss_rm =
+		(struct iwm_umac_notif_bss_removed *)buf;
+	struct iwm_bss_info *bss, *next;
+	u16 table_idx;
+	int i;
+
+	for (i = 0; i < le32_to_cpu(bss_rm->count); i++) {
+		table_idx = (le16_to_cpu(bss_rm->entries[i])
+			     & IWM_BSS_REMOVE_INDEX_MSK);
+		list_for_each_entry_safe(bss, next, &iwm->bss_list, node)
+			if (bss->bss->table_idx == cpu_to_le16(table_idx)) {
+				struct ieee80211_mgmt *mgmt;
+
+				mgmt = (struct ieee80211_mgmt *)
+					(bss->bss->frame_buf);
+				IWM_DBG_MLME(iwm, ERR,
+					     "BSS removed: %pM\n",
+					     mgmt->bssid);
+				list_del(&bss->node);
+				kfree(bss->bss);
+				kfree(bss);
+			}
+	}
+
+	return 0;
+}
+
+static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf,
+			      unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_mgt_frame *mgt_frame =
+	(struct iwm_umac_notif_mgt_frame *)buf;
+	struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame;
+	u8 *ie;
+	unsigned int event;
+	union iwreq_data wrqu;
+
+	IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
+		    le16_to_cpu(mgt_frame->len));
+
+	if (ieee80211_is_assoc_req(mgt->frame_control)) {
+		ie = mgt->u.assoc_req.variable;;
+		event = IWEVASSOCREQIE;
+	} else if (ieee80211_is_reassoc_req(mgt->frame_control)) {
+		ie = mgt->u.reassoc_req.variable;;
+		event = IWEVASSOCREQIE;
+	} else if (ieee80211_is_assoc_resp(mgt->frame_control)) {
+		ie = mgt->u.assoc_resp.variable;;
+		event = IWEVASSOCRESPIE;
+	} else if (ieee80211_is_reassoc_resp(mgt->frame_control)) {
+		ie = mgt->u.reassoc_resp.variable;;
+		event = IWEVASSOCRESPIE;
+	} else {
+		IWM_ERR(iwm, "Unsupported management frame");
+		return 0;
+	}
+
+	wrqu.data.length = le16_to_cpu(mgt_frame->len) - (ie - (u8 *)mgt);
+
+	IWM_HEXDUMP(iwm, DBG, MLME, "EVT: ", ie, wrqu.data.length);
+	wireless_send_event(iwm_to_ndev(iwm), event, &wrqu, ie);
+
+	return 0;
+}
+
+static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf,
+			unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_wifi_if *notif =
+		(struct iwm_umac_notif_wifi_if *)buf;
+
+	switch (notif->status) {
+	case WIFI_IF_NTFY_ASSOC_START:
+		return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd);
+	case WIFI_IF_NTFY_ASSOC_COMPLETE:
+		return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd);
+	case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE:
+		return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd);
+	case WIFI_IF_NTFY_CONNECTION_TERMINATED:
+		IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
+		break;
+	case WIFI_IF_NTFY_SCAN_COMPLETE:
+		return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd);
+	case WIFI_IF_NTFY_STA_TABLE_CHANGE:
+		return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd);
+	case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED:
+		IWM_DBG_MLME(iwm, DBG, "Extended IE required\n");
+		break;
+	case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED:
+		return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd);
+	case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED:
+		return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd);
+		break;
+	case WIFI_IF_NTFY_MGMT_FRAME:
+		return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd);
+	case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START:
+	case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE:
+	case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START:
+	case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT:
+	case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START:
+	case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE:
+	case WIFI_DBG_IF_NTFY_CNCT_ATC_START:
+	case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION:
+	case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP:
+	case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP:
+		IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n",
+			     notif->status);
+		break;
+	default:
+		IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status);
+		break;
+	}
+
+	return 0;
+}
+
+#define IWM_STATS_UPDATE_INTERVAL		(2 * HZ)
+
+static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf,
+			      unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf;
+	struct iw_statistics *wstats = &iwm->wstats;
+	u16 max_rate = 0;
+	int i;
+
+	IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n");
+
+	if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) {
+		for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) {
+			max_rate = max_t(u16, max_rate,
+					 max(le16_to_cpu(stats->tx_rate[i]),
+					     le16_to_cpu(stats->rx_rate[i])));
+		}
+		/* UMAC passes rate info multiplies by 2 */
+		iwm->rate = max_rate >> 1;
+	}
+
+	wstats->status = 0;
+
+	wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid);
+	wstats->discard.code = le32_to_cpu(stats->rx_drop_decode);
+	wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly);
+	wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry);
+
+	wstats->miss.beacon = le32_to_cpu(stats->missed_beacons);
+
+	/* according to cfg80211 */
+	if (stats->rssi_dbm < -110)
+		wstats->qual.qual = 0;
+	else if (stats->rssi_dbm > -40)
+		wstats->qual.qual = 70;
+	else
+		wstats->qual.qual = stats->rssi_dbm + 110;
+
+	wstats->qual.level = stats->rssi_dbm;
+	wstats->qual.noise = stats->noise_dbm;
+	wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
+
+	schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL);
+
+	mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD));
+
+	return 0;
+}
+
+static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf,
+				unsigned long buf_size,
+				struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy =
+		(struct iwm_umac_cmd_eeprom_proxy *)
+		(buf + sizeof(struct iwm_umac_wifi_in_hdr));
+	struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr;
+	u32 hdr_offset = le32_to_cpu(hdr->offset);
+	u32 hdr_len = le32_to_cpu(hdr->len);
+	u32 hdr_type = le32_to_cpu(hdr->type);
+
+	IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n",
+		    hdr_type, hdr_len, hdr_offset);
+
+	if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN)
+		return -EINVAL;
+
+#ifdef CONFIG_IWM_B0_HW_SUPPORT
+	if (hdr_offset == IWM_EEPROM_SKU_CAP_OFF) {
+		if (eeprom_proxy->buf[0] == 0xff)
+			iwm->conf.hw_b0 = 1;
+	}
+#endif
+
+	switch (hdr_type) {
+	case IWM_UMAC_CMD_EEPROM_TYPE_READ:
+		memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len);
+		break;
+	case IWM_UMAC_CMD_EEPROM_TYPE_WRITE:
+	default:
+		return -ENOTSUPP;
+	}
+
+	return 0;
+}
+
+static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf,
+				     unsigned long buf_size,
+				     struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_cmd_get_channel_list *ch_list =
+			(struct iwm_umac_cmd_get_channel_list *)
+			(buf + sizeof(struct iwm_umac_wifi_in_hdr));
+	struct wiphy *wiphy = iwm_to_wiphy(iwm);
+	struct ieee80211_supported_band *band;
+	int i;
+
+	band = wiphy->bands[IEEE80211_BAND_2GHZ];
+
+	for (i = 0; i < band->n_channels; i++) {
+		unsigned long ch_mask_0 =
+			le32_to_cpu(ch_list->ch[0].channels_mask);
+		unsigned long ch_mask_2 =
+			le32_to_cpu(ch_list->ch[2].channels_mask);
+
+		if (!test_bit(i, &ch_mask_0))
+			band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
+
+		if (!test_bit(i, &ch_mask_2))
+			band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
+	}
+
+	band = wiphy->bands[IEEE80211_BAND_5GHZ];
+
+	for (i = 0; i < min(band->n_channels, 32); i++) {
+		unsigned long ch_mask_1 =
+			le32_to_cpu(ch_list->ch[1].channels_mask);
+		unsigned long ch_mask_3 =
+			le32_to_cpu(ch_list->ch[3].channels_mask);
+
+		if (!test_bit(i, &ch_mask_1))
+			band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
+
+		if (!test_bit(i, &ch_mask_3))
+			band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS;
+	}
+
+	return 0;
+}
+
+static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf,
+				   unsigned long buf_size,
+				   struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_umac_wifi_if *hdr =
+			(struct iwm_umac_wifi_if *)cmd->buf.payload;
+
+	IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: "
+		    "oid is %d\n", hdr->oid);
+
+	switch (hdr->oid) {
+	case UMAC_WIFI_IF_CMD_SET_PROFILE:
+		iwm->umac_profile_active = 1;
+		wake_up_interruptible(&iwm->mlme_queue);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf,
+			      unsigned long buf_size, struct iwm_wifi_cmd *cmd)
+{
+	struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *)
+				(buf + sizeof(struct iwm_umac_wifi_in_hdr));
+	u32 flags = le32_to_cpu(state->flags);
+
+	IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n",
+		 flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF",
+		 flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF");
+
+	if (flags & IWM_CARD_STATE_HW_DISABLED)
+		set_bit(IWM_RADIO_RFKILL_HW, &iwm->radio);
+	else
+		clear_bit(IWM_RADIO_RFKILL_HW, &iwm->radio);
+
+	return 0;
+}
+
+static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf,
+			      unsigned long buf_size)
+{
+	struct iwm_umac_wifi_in_hdr *wifi_hdr;
+	struct iwm_wifi_cmd *cmd;
+	u8 source, cmd_id;
+	u16 seq_num;
+	u32 count;
+	u8 resp;
+
+	wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
+	cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
+
+	source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
+	if (source >= IWM_SRC_NUM) {
+		IWM_CRIT(iwm, "invalid source %d\n", source);
+		return -EINVAL;
+	}
+
+	count = (GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT));
+	count += sizeof(struct iwm_umac_wifi_in_hdr) -
+		 sizeof(struct iwm_dev_cmd_hdr);
+	if (count > buf_size) {
+		IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size);
+		return -EINVAL;
+	}
+
+	resp = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_STATUS);
+
+	seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num);
+
+	IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n",
+		   cmd_id, source, seq_num);
+
+	/*
+	 * If this is a response to a previously sent command, there must
+	 * be a pending command for this sequence number.
+	 */
+	cmd = iwm_get_pending_wifi_cmd(iwm, seq_num);
+
+	/* Notify the caller only for sync commands. */
+	switch (source) {
+	case UMAC_HDI_IN_SOURCE_FHRX:
+		if (iwm->lmac_handlers[cmd_id] &&
+		    test_bit(cmd_id, &iwm->lmac_handler_map[0]))
+			return iwm_notif_send(iwm, cmd, cmd_id, source,
+					      buf, count);
+		break;
+	case UMAC_HDI_IN_SOURCE_FW:
+		if (iwm->umac_handlers[cmd_id] &&
+		    test_bit(cmd_id, &iwm->umac_handler_map[0]))
+			return iwm_notif_send(iwm, cmd, cmd_id, source,
+					      buf, count);
+		break;
+	case UMAC_HDI_IN_SOURCE_UDMA:
+		break;
+	}
+
+	return iwm_rx_handle_resp(iwm, buf, count, cmd);
+}
+
+int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size,
+		       struct iwm_wifi_cmd *cmd)
+{
+	u8 source, cmd_id;
+	struct iwm_umac_wifi_in_hdr *wifi_hdr;
+	int ret = 0;
+
+	wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf;
+	cmd_id = wifi_hdr->sw_hdr.cmd.cmd;
+
+	source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE);
+
+	IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source);
+
+	switch (source) {
+	case UMAC_HDI_IN_SOURCE_FHRX:
+		if (iwm->lmac_handlers[cmd_id])
+			ret = iwm->lmac_handlers[cmd_id]
+					(iwm, buf, buf_size, cmd);
+		break;
+	case UMAC_HDI_IN_SOURCE_FW:
+		if (iwm->umac_handlers[cmd_id])
+			ret = iwm->umac_handlers[cmd_id]
+					(iwm, buf, buf_size, cmd);
+		break;
+	case UMAC_HDI_IN_SOURCE_UDMA:
+		ret = -EINVAL;
+		break;
+	}
+
+	kfree(cmd);
+
+	return ret;
+}
+
+static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf,
+				 unsigned long buf_size)
+{
+	u8 seq_num;
+	struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf;
+	struct iwm_nonwifi_cmd *cmd, *next;
+
+	seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM);
+
+	/*
+	 * We received a non wifi answer.
+	 * Let's check if there's a pending command for it, and if so
+	 * replace the command payload with the buffer, and then wake the
+	 * callers up.
+	 * That means we only support synchronised non wifi command response
+	 * schemes.
+	 */
+	list_for_each_entry_safe(cmd, next, &iwm->nonwifi_pending_cmd, pending)
+		if (cmd->seq_num == seq_num) {
+			cmd->resp_received = 1;
+			cmd->buf.len = buf_size;
+			memcpy(cmd->buf.hdr, buf, buf_size);
+			wake_up_interruptible(&iwm->nonwifi_queue);
+		}
+
+	return 0;
+}
+
+static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf,
+			      unsigned long buf_size)
+{
+	int ret = 0;
+	u8 op_code;
+	unsigned long buf_offset = 0;
+	struct iwm_udma_in_hdr *hdr;
+
+	/*
+	 * To allow for a more efficient bus usage, UMAC
+	 * messages are encapsulated into UDMA ones. This
+	 * way we can have several UMAC messages in one bus
+	 * transfer.
+	 * A UDMA frame size is always aligned on 16 bytes,
+	 * and a UDMA frame must not start with a UMAC_PAD_TERMINAL
+	 * word. This is how we parse a bus frame into several
+	 * UDMA ones.
+	 */
+	while (buf_offset < buf_size) {
+
+		hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset);
+
+		if (iwm_rx_check_udma_hdr(hdr) < 0) {
+			IWM_DBG_RX(iwm, DBG, "End of frame\n");
+			break;
+		}
+
+		op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE);
+
+		IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code);
+
+		if (op_code == UMAC_HDI_IN_OPCODE_WIFI) {
+			ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset,
+						  buf_size - buf_offset);
+		} else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) {
+			if (GET_VAL32(hdr->cmd,
+				      UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) !=
+			    UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) {
+				IWM_ERR(iwm, "Incorrect hw signature\n");
+				return -EINVAL;
+			}
+			ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset,
+						     buf_size - buf_offset);
+		} else {
+			IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code);
+			ret |= -EINVAL;
+		}
+
+		buf_offset += iwm_rx_resp_size(hdr);
+	}
+
+	return ret;
+}
+
+int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size)
+{
+	struct iwm_udma_in_hdr *hdr;
+
+	hdr = (struct iwm_udma_in_hdr *)buf;
+
+	switch (le32_to_cpu(hdr->cmd)) {
+	case UMAC_REBOOT_BARKER:
+		return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION,
+				      IWM_SRC_UDMA, buf, buf_size);
+	case UMAC_ACK_BARKER:
+		return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION,
+				      IWM_SRC_UDMA, NULL, 0);
+	default:
+		IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd);
+		return iwm_rx_handle_umac(iwm, buf, buf_size);
+	}
+
+	return 0;
+}
+
+static const iwm_handler iwm_umac_handlers[] =
+{
+	[UMAC_NOTIFY_OPCODE_ERROR]		= iwm_ntf_error,
+	[UMAC_NOTIFY_OPCODE_ALIVE]		= iwm_ntf_umac_alive,
+	[UMAC_NOTIFY_OPCODE_INIT_COMPLETE]	= iwm_ntf_init_complete,
+	[UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS]	= iwm_ntf_wifi_status,
+	[UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER]	= iwm_ntf_mlme,
+	[UMAC_NOTIFY_OPCODE_PAGE_DEALLOC]	= iwm_ntf_tx_credit_update,
+	[UMAC_NOTIFY_OPCODE_RX_TICKET]		= iwm_ntf_rx_ticket,
+	[UMAC_CMD_OPCODE_RESET]			= iwm_ntf_umac_reset,
+	[UMAC_NOTIFY_OPCODE_STATS]		= iwm_ntf_statistics,
+	[UMAC_CMD_OPCODE_EEPROM_PROXY]		= iwm_ntf_eeprom_proxy,
+	[UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST]	= iwm_ntf_channel_info_list,
+	[REPLY_RX_MPDU_CMD]			= iwm_ntf_rx_packet,
+	[UMAC_CMD_OPCODE_WIFI_IF_WRAPPER]	= iwm_ntf_wifi_if_wrapper,
+};
+
+static const iwm_handler iwm_lmac_handlers[] =
+{
+	[REPLY_TX]				= iwm_ntf_tx,
+	[REPLY_ALIVE]				= iwm_ntf_lmac_version,
+	[CALIBRATION_RES_NOTIFICATION]		= iwm_ntf_calib_res,
+	[CALIBRATION_COMPLETE_NOTIFICATION]	= iwm_ntf_calib_complete,
+	[CALIBRATION_CFG_CMD]			= iwm_ntf_calib_cfg,
+	[REPLY_RX_MPDU_CMD]			= iwm_ntf_rx_packet,
+	[CARD_STATE_NOTIFICATION]		= iwm_ntf_card_state,
+};
+
+void iwm_rx_setup_handlers(struct iwm_priv *iwm)
+{
+	iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers;
+	iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers;
+}
+
+static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len)
+{
+	struct ieee80211_hdr *hdr;
+	unsigned int hdr_len;
+
+	hdr = (struct ieee80211_hdr *)skb->data;
+
+	if (!ieee80211_has_protected(hdr->frame_control))
+		return;
+
+	hdr_len = ieee80211_hdrlen(hdr->frame_control);
+	if (hdr_total_len <= hdr_len)
+		return;
+
+	memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len);
+	skb_pull(skb, (hdr_total_len - hdr_len));
+}
+
+static void iwm_rx_adjust_packet(struct iwm_priv *iwm,
+				 struct iwm_rx_packet *packet,
+				 struct iwm_rx_ticket_node *ticket_node)
+{
+	u32 payload_offset = 0, payload_len;
+	struct iwm_rx_ticket *ticket = ticket_node->ticket;
+	struct iwm_rx_mpdu_hdr *mpdu_hdr;
+	struct ieee80211_hdr *hdr;
+
+	mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data;
+	payload_offset += sizeof(struct iwm_rx_mpdu_hdr);
+	/* Padding is 0 or 2 bytes */
+	payload_len = le16_to_cpu(mpdu_hdr->len) +
+		(le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK);
+	payload_len -= ticket->tail_len;
+
+	IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, "
+		   "ticket offset:%d ticket tail len:%d\n",
+		   payload_len, payload_offset, ticket->payload_offset,
+		   ticket->tail_len);
+
+	IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len);
+
+	skb_pull(packet->skb, payload_offset);
+	skb_trim(packet->skb, payload_len);
+
+	iwm_remove_iv(packet->skb, ticket->payload_offset);
+
+	hdr = (struct ieee80211_hdr *) packet->skb->data;
+	if (ieee80211_is_data_qos(hdr->frame_control)) {
+		/* UMAC handed QOS_DATA frame with 2 padding bytes appended
+		 * to the qos_ctl field in IEEE 802.11 headers. */
+		memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2,
+			packet->skb->data,
+			ieee80211_hdrlen(hdr->frame_control) -
+			IEEE80211_QOS_CTL_LEN);
+		hdr = (struct ieee80211_hdr *) skb_pull(packet->skb,
+				IEEE80211_QOS_CTL_LEN + 2);
+		hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
+	}
+
+	IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ",
+		    packet->skb->data, packet->skb->len);
+}
+
+static void classify8023(struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+
+	if (ieee80211_is_data_qos(hdr->frame_control)) {
+		u8 *qc = ieee80211_get_qos_ctl(hdr);
+		/* frame has qos control */
+		skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK;
+	} else {
+		skb->priority = 0;
+	}
+}
+
+static void iwm_rx_process_packet(struct iwm_priv *iwm,
+				  struct iwm_rx_packet *packet,
+				  struct iwm_rx_ticket_node *ticket_node)
+{
+	int ret;
+	struct sk_buff *skb = packet->skb;
+	struct wireless_dev *wdev = iwm_to_wdev(iwm);
+	struct net_device *ndev = iwm_to_ndev(iwm);
+
+	IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id);
+
+	switch (le16_to_cpu(ticket_node->ticket->action)) {
+	case IWM_RX_TICKET_RELEASE:
+		IWM_DBG_RX(iwm, DBG, "RELEASE packet\n");
+		classify8023(skb);
+		iwm_rx_adjust_packet(iwm, packet, ticket_node);
+		ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype);
+		if (ret < 0) {
+			IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - "
+				   "%d\n", ret);
+			break;
+		}
+
+		IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
+
+		skb->dev = iwm_to_ndev(iwm);
+		skb->protocol = eth_type_trans(skb, ndev);
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
+		memset(skb->cb, 0, sizeof(skb->cb));
+
+		ndev->stats.rx_packets++;
+		ndev->stats.rx_bytes += skb->len;
+
+		if (netif_rx(skb) == NET_RX_DROP) {
+			IWM_ERR(iwm, "Packet dropped\n");
+			ndev->stats.rx_dropped++;
+		}
+		break;
+	case IWM_RX_TICKET_DROP:
+		IWM_DBG_RX(iwm, DBG, "DROP packet\n");
+		kfree_skb(packet->skb);
+		break;
+	default:
+		IWM_ERR(iwm, "Unknow ticket action: %d\n",
+			le16_to_cpu(ticket_node->ticket->action));
+		kfree_skb(packet->skb);
+	}
+
+	kfree(packet);
+	iwm_rx_ticket_node_free(ticket_node);
+}
+
+/*
+ * Rx data processing:
+ *
+ * We're receiving Rx packet from the LMAC, and Rx ticket from
+ * the UMAC.
+ * To forward a target data packet upstream (i.e. to the
+ * kernel network stack), we must have received an Rx ticket
+ * that tells us we're allowed to release this packet (ticket
+ * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates,
+ * among other things, where valid data actually starts in the Rx
+ * packet.
+ */
+void iwm_rx_worker(struct work_struct *work)
+{
+	struct iwm_priv *iwm;
+	struct iwm_rx_ticket_node *ticket, *next;
+
+	iwm = container_of(work, struct iwm_priv, rx_worker);
+
+	/*
+	 * We go through the tickets list and if there is a pending
+	 * packet for it, we push it upstream.
+	 * We stop whenever a ticket is missing its packet, as we're
+	 * supposed to send the packets in order.
+	 */
+	list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
+		struct iwm_rx_packet *packet =
+			iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id));
+
+		if (!packet) {
+			IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d "
+				   "to be handled first\n",
+				   le16_to_cpu(ticket->ticket->id));
+			return;
+		}
+
+		list_del(&ticket->node);
+		list_del(&packet->node);
+		iwm_rx_process_packet(iwm, packet, ticket);
+	}
+}
+