Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:

 1) Add Maglev hashing scheduler to IPVS, from Inju Song.

 2) Lots of new TC subsystem tests from Roman Mashak.

 3) Add TCP zero copy receive and fix delayed acks and autotuning with
    SO_RCVLOWAT, from Eric Dumazet.

 4) Add XDP_REDIRECT support to mlx5 driver, from Jesper Dangaard
    Brouer.

 5) Add ttl inherit support to vxlan, from Hangbin Liu.

 6) Properly separate ipv6 routes into their logically independant
    components. fib6_info for the routing table, and fib6_nh for sets of
    nexthops, which thus can be shared. From David Ahern.

 7) Add bpf_xdp_adjust_tail helper, which can be used to generate ICMP
    messages from XDP programs. From Nikita V. Shirokov.

 8) Lots of long overdue cleanups to the r8169 driver, from Heiner
    Kallweit.

 9) Add BTF ("BPF Type Format"), from Martin KaFai Lau.

10) Add traffic condition monitoring to iwlwifi, from Luca Coelho.

11) Plumb extack down into fib_rules, from Roopa Prabhu.

12) Add Flower classifier offload support to igb, from Vinicius Costa
    Gomes.

13) Add UDP GSO support, from Willem de Bruijn.

14) Add documentation for eBPF helpers, from Quentin Monnet.

15) Add TLS tx offload to mlx5, from Ilya Lesokhin.

16) Allow applications to be given the number of bytes available to read
    on a socket via a control message returned from recvmsg(), from
    Soheil Hassas Yeganeh.

17) Add x86_32 eBPF JIT compiler, from Wang YanQing.

18) Add AF_XDP sockets, with zerocopy support infrastructure as well.
    From Björn Töpel.

19) Remove indirect load support from all of the BPF JITs and handle
    these operations in the verifier by translating them into native BPF
    instead. From Daniel Borkmann.

20) Add GRO support to ipv6 gre tunnels, from Eran Ben Elisha.

21) Allow XDP programs to do lookups in the main kernel routing tables
    for forwarding. From David Ahern.

22) Allow drivers to store hardware state into an ELF section of kernel
    dump vmcore files, and use it in cxgb4. From Rahul Lakkireddy.

23) Various RACK and loss detection improvements in TCP, from Yuchung
    Cheng.

24) Add TCP SACK compression, from Eric Dumazet.

25) Add User Mode Helper support and basic bpfilter infrastructure, from
    Alexei Starovoitov.

26) Support ports and protocol values in RTM_GETROUTE, from Roopa
    Prabhu.

27) Support bulking in ->ndo_xdp_xmit() API, from Jesper Dangaard
    Brouer.

28) Add lots of forwarding selftests, from Petr Machata.

29) Add generic network device failover driver, from Sridhar Samudrala.

* ra.kernel.org:/pub/scm/linux/kernel/git/davem/net-next: (1959 commits)
  strparser: Add __strp_unpause and use it in ktls.
  rxrpc: Fix terminal retransmission connection ID to include the channel
  net: hns3: Optimize PF CMDQ interrupt switching process
  net: hns3: Fix for VF mailbox receiving unknown message
  net: hns3: Fix for VF mailbox cannot receiving PF response
  bnx2x: use the right constant
  Revert "net: sched: cls: Fix offloading when ingress dev is vxlan"
  net: dsa: b53: Fix for brcm tag issue in Cygnus SoC
  enic: fix UDP rss bits
  netdev-FAQ: clarify DaveM's position for stable backports
  rtnetlink: validate attributes in do_setlink()
  mlxsw: Add extack messages for port_{un, }split failures
  netdevsim: Add extack error message for devlink reload
  devlink: Add extack to reload and port_{un, }split operations
  net: metrics: add proper netlink validation
  ipmr: fix error path when ipmr_new_table fails
  ip6mr: only set ip6mr_table from setsockopt when ip6mr_new_table succeeds
  net: hns3: remove unused hclgevf_cfg_func_mta_filter
  netfilter: provide udp*_lib_lookup for nf_tproxy
  qed*: Utilize FW 8.37.2.0
  ...

1 files changed, 1413 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
new file mode 100644
index 000000000000..a3a7042fe13a
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -0,0 +1,1413 @@
+/*
+ * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include "debug.h"
+#include "hif.h"
+#include "htc.h"
+#include "ce.h"
+#include "snoc.h"
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/clk.h>
+#define  WCN3990_CE_ATTR_FLAGS 0
+#define ATH10K_SNOC_RX_POST_RETRY_MS 50
+#define CE_POLL_PIPE 4
+
+static char *const ce_name[] = {
+	"WLAN_CE_0",
+	"WLAN_CE_1",
+	"WLAN_CE_2",
+	"WLAN_CE_3",
+	"WLAN_CE_4",
+	"WLAN_CE_5",
+	"WLAN_CE_6",
+	"WLAN_CE_7",
+	"WLAN_CE_8",
+	"WLAN_CE_9",
+	"WLAN_CE_10",
+	"WLAN_CE_11",
+};
+
+static struct ath10k_wcn3990_vreg_info vreg_cfg[] = {
+	{NULL, "vdd-0.8-cx-mx", 800000, 800000, 0, 0, false},
+	{NULL, "vdd-1.8-xo", 1800000, 1800000, 0, 0, false},
+	{NULL, "vdd-1.3-rfa", 1304000, 1304000, 0, 0, false},
+	{NULL, "vdd-3.3-ch0", 3312000, 3312000, 0, 0, false},
+};
+
+static struct ath10k_wcn3990_clk_info clk_cfg[] = {
+	{NULL, "cxo_ref_clk_pin", 0, false},
+};
+
+static void ath10k_snoc_htc_tx_cb(struct ath10k_ce_pipe *ce_state);
+static void ath10k_snoc_htt_tx_cb(struct ath10k_ce_pipe *ce_state);
+static void ath10k_snoc_htc_rx_cb(struct ath10k_ce_pipe *ce_state);
+static void ath10k_snoc_htt_rx_cb(struct ath10k_ce_pipe *ce_state);
+static void ath10k_snoc_htt_htc_rx_cb(struct ath10k_ce_pipe *ce_state);
+
+static const struct ath10k_snoc_drv_priv drv_priv = {
+	.hw_rev = ATH10K_HW_WCN3990,
+	.dma_mask = DMA_BIT_MASK(37),
+};
+
+static struct ce_attr host_ce_config_wlan[] = {
+	/* CE0: host->target HTC control streams */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 16,
+		.src_sz_max = 2048,
+		.dest_nentries = 0,
+		.send_cb = ath10k_snoc_htc_tx_cb,
+	},
+
+	/* CE1: target->host HTT + HTC control */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 0,
+		.src_sz_max = 2048,
+		.dest_nentries = 512,
+		.recv_cb = ath10k_snoc_htt_htc_rx_cb,
+	},
+
+	/* CE2: target->host WMI */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 0,
+		.src_sz_max = 2048,
+		.dest_nentries = 64,
+		.recv_cb = ath10k_snoc_htc_rx_cb,
+	},
+
+	/* CE3: host->target WMI */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 32,
+		.src_sz_max = 2048,
+		.dest_nentries = 0,
+		.send_cb = ath10k_snoc_htc_tx_cb,
+	},
+
+	/* CE4: host->target HTT */
+	{
+		.flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR,
+		.src_nentries = 256,
+		.src_sz_max = 256,
+		.dest_nentries = 0,
+		.send_cb = ath10k_snoc_htt_tx_cb,
+	},
+
+	/* CE5: target->host HTT (ipa_uc->target ) */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 0,
+		.src_sz_max = 512,
+		.dest_nentries = 512,
+		.recv_cb = ath10k_snoc_htt_rx_cb,
+	},
+
+	/* CE6: target autonomous hif_memcpy */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 0,
+		.src_sz_max = 0,
+		.dest_nentries = 0,
+	},
+
+	/* CE7: ce_diag, the Diagnostic Window */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 2,
+		.src_sz_max = 2048,
+		.dest_nentries = 2,
+	},
+
+	/* CE8: Target to uMC */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 0,
+		.src_sz_max = 2048,
+		.dest_nentries = 128,
+	},
+
+	/* CE9 target->host HTT */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 0,
+		.src_sz_max = 2048,
+		.dest_nentries = 512,
+		.recv_cb = ath10k_snoc_htt_htc_rx_cb,
+	},
+
+	/* CE10: target->host HTT */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 0,
+		.src_sz_max = 2048,
+		.dest_nentries = 512,
+		.recv_cb = ath10k_snoc_htt_htc_rx_cb,
+	},
+
+	/* CE11: target -> host PKTLOG */
+	{
+		.flags = CE_ATTR_FLAGS,
+		.src_nentries = 0,
+		.src_sz_max = 2048,
+		.dest_nentries = 512,
+		.recv_cb = ath10k_snoc_htt_htc_rx_cb,
+	},
+};
+
+static struct service_to_pipe target_service_to_ce_map_wlan[] = {
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_VO),
+		__cpu_to_le32(PIPEDIR_OUT),	/* out = UL = host -> target */
+		__cpu_to_le32(3),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_VO),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(2),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_BK),
+		__cpu_to_le32(PIPEDIR_OUT),	/* out = UL = host -> target */
+		__cpu_to_le32(3),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_BK),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(2),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_BE),
+		__cpu_to_le32(PIPEDIR_OUT),	/* out = UL = host -> target */
+		__cpu_to_le32(3),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_BE),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(2),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_VI),
+		__cpu_to_le32(PIPEDIR_OUT),	/* out = UL = host -> target */
+		__cpu_to_le32(3),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_DATA_VI),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(2),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_CONTROL),
+		__cpu_to_le32(PIPEDIR_OUT),	/* out = UL = host -> target */
+		__cpu_to_le32(3),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_WMI_CONTROL),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(2),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_RSVD_CTRL),
+		__cpu_to_le32(PIPEDIR_OUT),	/* out = UL = host -> target */
+		__cpu_to_le32(0),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_RSVD_CTRL),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(2),
+	},
+	{ /* not used */
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS),
+		__cpu_to_le32(PIPEDIR_OUT),	/* out = UL = host -> target */
+		__cpu_to_le32(0),
+	},
+	{ /* not used */
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(2),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_HTT_DATA_MSG),
+		__cpu_to_le32(PIPEDIR_OUT),	/* out = UL = host -> target */
+		__cpu_to_le32(4),
+	},
+	{
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_HTT_DATA_MSG),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(1),
+	},
+	{ /* not used */
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_TEST_RAW_STREAMS),
+		__cpu_to_le32(PIPEDIR_OUT),
+		__cpu_to_le32(5),
+	},
+	{ /* in = DL = target -> host */
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_HTT_DATA2_MSG),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(9),
+	},
+	{ /* in = DL = target -> host */
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_HTT_DATA3_MSG),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(10),
+	},
+	{ /* in = DL = target -> host pktlog */
+		__cpu_to_le32(ATH10K_HTC_SVC_ID_HTT_LOG_MSG),
+		__cpu_to_le32(PIPEDIR_IN),	/* in = DL = target -> host */
+		__cpu_to_le32(11),
+	},
+	/* (Additions here) */
+
+	{ /* must be last */
+		__cpu_to_le32(0),
+		__cpu_to_le32(0),
+		__cpu_to_le32(0),
+	},
+};
+
+void ath10k_snoc_write32(struct ath10k *ar, u32 offset, u32 value)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+
+	iowrite32(value, ar_snoc->mem + offset);
+}
+
+u32 ath10k_snoc_read32(struct ath10k *ar, u32 offset)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	u32 val;
+
+	val = ioread32(ar_snoc->mem + offset);
+
+	return val;
+}
+
+static int __ath10k_snoc_rx_post_buf(struct ath10k_snoc_pipe *pipe)
+{
+	struct ath10k_ce_pipe *ce_pipe = pipe->ce_hdl;
+	struct ath10k *ar = pipe->hif_ce_state;
+	struct ath10k_ce *ce = ath10k_ce_priv(ar);
+	struct sk_buff *skb;
+	dma_addr_t paddr;
+	int ret;
+
+	skb = dev_alloc_skb(pipe->buf_sz);
+	if (!skb)
+		return -ENOMEM;
+
+	WARN_ONCE((unsigned long)skb->data & 3, "unaligned skb");
+
+	paddr = dma_map_single(ar->dev, skb->data,
+			       skb->len + skb_tailroom(skb),
+			       DMA_FROM_DEVICE);
+	if (unlikely(dma_mapping_error(ar->dev, paddr))) {
+		ath10k_warn(ar, "failed to dma map snoc rx buf\n");
+		dev_kfree_skb_any(skb);
+		return -EIO;
+	}
+
+	ATH10K_SKB_RXCB(skb)->paddr = paddr;
+
+	spin_lock_bh(&ce->ce_lock);
+	ret = ce_pipe->ops->ce_rx_post_buf(ce_pipe, skb, paddr);
+	spin_unlock_bh(&ce->ce_lock);
+	if (ret) {
+		dma_unmap_single(ar->dev, paddr, skb->len + skb_tailroom(skb),
+				 DMA_FROM_DEVICE);
+		dev_kfree_skb_any(skb);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void ath10k_snoc_rx_post_pipe(struct ath10k_snoc_pipe *pipe)
+{
+	struct ath10k *ar = pipe->hif_ce_state;
+	struct ath10k_ce *ce = ath10k_ce_priv(ar);
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_ce_pipe *ce_pipe = pipe->ce_hdl;
+	int ret, num;
+
+	if (pipe->buf_sz == 0)
+		return;
+
+	if (!ce_pipe->dest_ring)
+		return;
+
+	spin_lock_bh(&ce->ce_lock);
+	num = __ath10k_ce_rx_num_free_bufs(ce_pipe);
+	spin_unlock_bh(&ce->ce_lock);
+	while (num--) {
+		ret = __ath10k_snoc_rx_post_buf(pipe);
+		if (ret) {
+			if (ret == -ENOSPC)
+				break;
+			ath10k_warn(ar, "failed to post rx buf: %d\n", ret);
+			mod_timer(&ar_snoc->rx_post_retry, jiffies +
+				  ATH10K_SNOC_RX_POST_RETRY_MS);
+			break;
+		}
+	}
+}
+
+static void ath10k_snoc_rx_post(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int i;
+
+	for (i = 0; i < CE_COUNT; i++)
+		ath10k_snoc_rx_post_pipe(&ar_snoc->pipe_info[i]);
+}
+
+static void ath10k_snoc_process_rx_cb(struct ath10k_ce_pipe *ce_state,
+				      void (*callback)(struct ath10k *ar,
+						       struct sk_buff *skb))
+{
+	struct ath10k *ar = ce_state->ar;
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_snoc_pipe *pipe_info =  &ar_snoc->pipe_info[ce_state->id];
+	struct sk_buff *skb;
+	struct sk_buff_head list;
+	void *transfer_context;
+	unsigned int nbytes, max_nbytes;
+
+	__skb_queue_head_init(&list);
+	while (ath10k_ce_completed_recv_next(ce_state, &transfer_context,
+					     &nbytes) == 0) {
+		skb = transfer_context;
+		max_nbytes = skb->len + skb_tailroom(skb);
+		dma_unmap_single(ar->dev, ATH10K_SKB_RXCB(skb)->paddr,
+				 max_nbytes, DMA_FROM_DEVICE);
+
+		if (unlikely(max_nbytes < nbytes)) {
+			ath10k_warn(ar, "rxed more than expected (nbytes %d, max %d)",
+				    nbytes, max_nbytes);
+			dev_kfree_skb_any(skb);
+			continue;
+		}
+
+		skb_put(skb, nbytes);
+		__skb_queue_tail(&list, skb);
+	}
+
+	while ((skb = __skb_dequeue(&list))) {
+		ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc rx ce pipe %d len %d\n",
+			   ce_state->id, skb->len);
+
+		callback(ar, skb);
+	}
+
+	ath10k_snoc_rx_post_pipe(pipe_info);
+}
+
+static void ath10k_snoc_htc_rx_cb(struct ath10k_ce_pipe *ce_state)
+{
+	ath10k_snoc_process_rx_cb(ce_state, ath10k_htc_rx_completion_handler);
+}
+
+static void ath10k_snoc_htt_htc_rx_cb(struct ath10k_ce_pipe *ce_state)
+{
+	/* CE4 polling needs to be done whenever CE pipe which transports
+	 * HTT Rx (target->host) is processed.
+	 */
+	ath10k_ce_per_engine_service(ce_state->ar, CE_POLL_PIPE);
+
+	ath10k_snoc_process_rx_cb(ce_state, ath10k_htc_rx_completion_handler);
+}
+
+static void ath10k_snoc_htt_rx_deliver(struct ath10k *ar, struct sk_buff *skb)
+{
+	skb_pull(skb, sizeof(struct ath10k_htc_hdr));
+	ath10k_htt_t2h_msg_handler(ar, skb);
+}
+
+static void ath10k_snoc_htt_rx_cb(struct ath10k_ce_pipe *ce_state)
+{
+	ath10k_ce_per_engine_service(ce_state->ar, CE_POLL_PIPE);
+	ath10k_snoc_process_rx_cb(ce_state, ath10k_snoc_htt_rx_deliver);
+}
+
+static void ath10k_snoc_rx_replenish_retry(struct timer_list *t)
+{
+	struct ath10k_pci *ar_snoc = from_timer(ar_snoc, t, rx_post_retry);
+	struct ath10k *ar = ar_snoc->ar;
+
+	ath10k_snoc_rx_post(ar);
+}
+
+static void ath10k_snoc_htc_tx_cb(struct ath10k_ce_pipe *ce_state)
+{
+	struct ath10k *ar = ce_state->ar;
+	struct sk_buff_head list;
+	struct sk_buff *skb;
+
+	__skb_queue_head_init(&list);
+	while (ath10k_ce_completed_send_next(ce_state, (void **)&skb) == 0) {
+		if (!skb)
+			continue;
+
+		__skb_queue_tail(&list, skb);
+	}
+
+	while ((skb = __skb_dequeue(&list)))
+		ath10k_htc_tx_completion_handler(ar, skb);
+}
+
+static void ath10k_snoc_htt_tx_cb(struct ath10k_ce_pipe *ce_state)
+{
+	struct ath10k *ar = ce_state->ar;
+	struct sk_buff *skb;
+
+	while (ath10k_ce_completed_send_next(ce_state, (void **)&skb) == 0) {
+		if (!skb)
+			continue;
+
+		dma_unmap_single(ar->dev, ATH10K_SKB_CB(skb)->paddr,
+				 skb->len, DMA_TO_DEVICE);
+		ath10k_htt_hif_tx_complete(ar, skb);
+	}
+}
+
+static int ath10k_snoc_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
+				 struct ath10k_hif_sg_item *items, int n_items)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_ce *ce = ath10k_ce_priv(ar);
+	struct ath10k_snoc_pipe *snoc_pipe;
+	struct ath10k_ce_pipe *ce_pipe;
+	int err, i = 0;
+
+	snoc_pipe = &ar_snoc->pipe_info[pipe_id];
+	ce_pipe = snoc_pipe->ce_hdl;
+	spin_lock_bh(&ce->ce_lock);
+
+	for (i = 0; i < n_items - 1; i++) {
+		ath10k_dbg(ar, ATH10K_DBG_SNOC,
+			   "snoc tx item %d paddr %pad len %d n_items %d\n",
+			   i, &items[i].paddr, items[i].len, n_items);
+
+		err = ath10k_ce_send_nolock(ce_pipe,
+					    items[i].transfer_context,
+					    items[i].paddr,
+					    items[i].len,
+					    items[i].transfer_id,
+					    CE_SEND_FLAG_GATHER);
+		if (err)
+			goto err;
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC,
+		   "snoc tx item %d paddr %pad len %d n_items %d\n",
+		   i, &items[i].paddr, items[i].len, n_items);
+
+	err = ath10k_ce_send_nolock(ce_pipe,
+				    items[i].transfer_context,
+				    items[i].paddr,
+				    items[i].len,
+				    items[i].transfer_id,
+				    0);
+	if (err)
+		goto err;
+
+	spin_unlock_bh(&ce->ce_lock);
+
+	return 0;
+
+err:
+	for (; i > 0; i--)
+		__ath10k_ce_send_revert(ce_pipe);
+
+	spin_unlock_bh(&ce->ce_lock);
+	return err;
+}
+
+static int ath10k_snoc_hif_get_target_info(struct ath10k *ar,
+					   struct bmi_target_info *target_info)
+{
+	target_info->version = ATH10K_HW_WCN3990;
+	target_info->type = ATH10K_HW_WCN3990;
+
+	return 0;
+}
+
+static u16 ath10k_snoc_hif_get_free_queue_number(struct ath10k *ar, u8 pipe)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "hif get free queue number\n");
+
+	return ath10k_ce_num_free_src_entries(ar_snoc->pipe_info[pipe].ce_hdl);
+}
+
+static void ath10k_snoc_hif_send_complete_check(struct ath10k *ar, u8 pipe,
+						int force)
+{
+	int resources;
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc hif send complete check\n");
+
+	if (!force) {
+		resources = ath10k_snoc_hif_get_free_queue_number(ar, pipe);
+
+		if (resources > (host_ce_config_wlan[pipe].src_nentries >> 1))
+			return;
+	}
+	ath10k_ce_per_engine_service(ar, pipe);
+}
+
+static int ath10k_snoc_hif_map_service_to_pipe(struct ath10k *ar,
+					       u16 service_id,
+					       u8 *ul_pipe, u8 *dl_pipe)
+{
+	const struct service_to_pipe *entry;
+	bool ul_set = false, dl_set = false;
+	int i;
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc hif map service\n");
+
+	for (i = 0; i < ARRAY_SIZE(target_service_to_ce_map_wlan); i++) {
+		entry = &target_service_to_ce_map_wlan[i];
+
+		if (__le32_to_cpu(entry->service_id) != service_id)
+			continue;
+
+		switch (__le32_to_cpu(entry->pipedir)) {
+		case PIPEDIR_NONE:
+			break;
+		case PIPEDIR_IN:
+			WARN_ON(dl_set);
+			*dl_pipe = __le32_to_cpu(entry->pipenum);
+			dl_set = true;
+			break;
+		case PIPEDIR_OUT:
+			WARN_ON(ul_set);
+			*ul_pipe = __le32_to_cpu(entry->pipenum);
+			ul_set = true;
+			break;
+		case PIPEDIR_INOUT:
+			WARN_ON(dl_set);
+			WARN_ON(ul_set);
+			*dl_pipe = __le32_to_cpu(entry->pipenum);
+			*ul_pipe = __le32_to_cpu(entry->pipenum);
+			dl_set = true;
+			ul_set = true;
+			break;
+		}
+	}
+
+	if (WARN_ON(!ul_set || !dl_set))
+		return -ENOENT;
+
+	return 0;
+}
+
+static void ath10k_snoc_hif_get_default_pipe(struct ath10k *ar,
+					     u8 *ul_pipe, u8 *dl_pipe)
+{
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc hif get default pipe\n");
+
+	(void)ath10k_snoc_hif_map_service_to_pipe(ar,
+						 ATH10K_HTC_SVC_ID_RSVD_CTRL,
+						 ul_pipe, dl_pipe);
+}
+
+static inline void ath10k_snoc_irq_disable(struct ath10k *ar)
+{
+	ath10k_ce_disable_interrupts(ar);
+}
+
+static inline void ath10k_snoc_irq_enable(struct ath10k *ar)
+{
+	ath10k_ce_enable_interrupts(ar);
+}
+
+static void ath10k_snoc_rx_pipe_cleanup(struct ath10k_snoc_pipe *snoc_pipe)
+{
+	struct ath10k_ce_pipe *ce_pipe;
+	struct ath10k_ce_ring *ce_ring;
+	struct sk_buff *skb;
+	struct ath10k *ar;
+	int i;
+
+	ar = snoc_pipe->hif_ce_state;
+	ce_pipe = snoc_pipe->ce_hdl;
+	ce_ring = ce_pipe->dest_ring;
+
+	if (!ce_ring)
+		return;
+
+	if (!snoc_pipe->buf_sz)
+		return;
+
+	for (i = 0; i < ce_ring->nentries; i++) {
+		skb = ce_ring->per_transfer_context[i];
+		if (!skb)
+			continue;
+
+		ce_ring->per_transfer_context[i] = NULL;
+
+		dma_unmap_single(ar->dev, ATH10K_SKB_RXCB(skb)->paddr,
+				 skb->len + skb_tailroom(skb),
+				 DMA_FROM_DEVICE);
+		dev_kfree_skb_any(skb);
+	}
+}
+
+static void ath10k_snoc_tx_pipe_cleanup(struct ath10k_snoc_pipe *snoc_pipe)
+{
+	struct ath10k_ce_pipe *ce_pipe;
+	struct ath10k_ce_ring *ce_ring;
+	struct ath10k_snoc *ar_snoc;
+	struct sk_buff *skb;
+	struct ath10k *ar;
+	int i;
+
+	ar = snoc_pipe->hif_ce_state;
+	ar_snoc = ath10k_snoc_priv(ar);
+	ce_pipe = snoc_pipe->ce_hdl;
+	ce_ring = ce_pipe->src_ring;
+
+	if (!ce_ring)
+		return;
+
+	if (!snoc_pipe->buf_sz)
+		return;
+
+	for (i = 0; i < ce_ring->nentries; i++) {
+		skb = ce_ring->per_transfer_context[i];
+		if (!skb)
+			continue;
+
+		ce_ring->per_transfer_context[i] = NULL;
+
+		ath10k_htc_tx_completion_handler(ar, skb);
+	}
+}
+
+static void ath10k_snoc_buffer_cleanup(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_snoc_pipe *pipe_info;
+	int pipe_num;
+
+	del_timer_sync(&ar_snoc->rx_post_retry);
+	for (pipe_num = 0; pipe_num < CE_COUNT; pipe_num++) {
+		pipe_info = &ar_snoc->pipe_info[pipe_num];
+		ath10k_snoc_rx_pipe_cleanup(pipe_info);
+		ath10k_snoc_tx_pipe_cleanup(pipe_info);
+	}
+}
+
+static void ath10k_snoc_hif_stop(struct ath10k *ar)
+{
+	ath10k_snoc_irq_disable(ar);
+	ath10k_snoc_buffer_cleanup(ar);
+	napi_synchronize(&ar->napi);
+	napi_disable(&ar->napi);
+	ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif stop\n");
+}
+
+static int ath10k_snoc_hif_start(struct ath10k *ar)
+{
+	ath10k_snoc_irq_enable(ar);
+	ath10k_snoc_rx_post(ar);
+
+	ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif start\n");
+
+	return 0;
+}
+
+static int ath10k_snoc_init_pipes(struct ath10k *ar)
+{
+	int i, ret;
+
+	for (i = 0; i < CE_COUNT; i++) {
+		ret = ath10k_ce_init_pipe(ar, i, &host_ce_config_wlan[i]);
+		if (ret) {
+			ath10k_err(ar, "failed to initialize copy engine pipe %d: %d\n",
+				   i, ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int ath10k_snoc_wlan_enable(struct ath10k *ar)
+{
+	return 0;
+}
+
+static void ath10k_snoc_wlan_disable(struct ath10k *ar)
+{
+}
+
+static void ath10k_snoc_hif_power_down(struct ath10k *ar)
+{
+	ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif power down\n");
+
+	ath10k_snoc_wlan_disable(ar);
+	ath10k_ce_free_rri(ar);
+}
+
+static int ath10k_snoc_hif_power_up(struct ath10k *ar)
+{
+	int ret;
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "%s:WCN3990 driver state = %d\n",
+		   __func__, ar->state);
+
+	ret = ath10k_snoc_wlan_enable(ar);
+	if (ret) {
+		ath10k_err(ar, "failed to enable wcn3990: %d\n", ret);
+		return ret;
+	}
+
+	ath10k_ce_alloc_rri(ar);
+
+	ret = ath10k_snoc_init_pipes(ar);
+	if (ret) {
+		ath10k_err(ar, "failed to initialize CE: %d\n", ret);
+		goto err_wlan_enable;
+	}
+
+	napi_enable(&ar->napi);
+	return 0;
+
+err_wlan_enable:
+	ath10k_snoc_wlan_disable(ar);
+
+	return ret;
+}
+
+static const struct ath10k_hif_ops ath10k_snoc_hif_ops = {
+	.read32		= ath10k_snoc_read32,
+	.write32	= ath10k_snoc_write32,
+	.start		= ath10k_snoc_hif_start,
+	.stop		= ath10k_snoc_hif_stop,
+	.map_service_to_pipe	= ath10k_snoc_hif_map_service_to_pipe,
+	.get_default_pipe	= ath10k_snoc_hif_get_default_pipe,
+	.power_up		= ath10k_snoc_hif_power_up,
+	.power_down		= ath10k_snoc_hif_power_down,
+	.tx_sg			= ath10k_snoc_hif_tx_sg,
+	.send_complete_check	= ath10k_snoc_hif_send_complete_check,
+	.get_free_queue_number	= ath10k_snoc_hif_get_free_queue_number,
+	.get_target_info	= ath10k_snoc_hif_get_target_info,
+};
+
+static const struct ath10k_bus_ops ath10k_snoc_bus_ops = {
+	.read32		= ath10k_snoc_read32,
+	.write32	= ath10k_snoc_write32,
+};
+
+int ath10k_snoc_get_ce_id_from_irq(struct ath10k *ar, int irq)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int i;
+
+	for (i = 0; i < CE_COUNT_MAX; i++) {
+		if (ar_snoc->ce_irqs[i].irq_line == irq)
+			return i;
+	}
+	ath10k_err(ar, "No matching CE id for irq %d\n", irq);
+
+	return -EINVAL;
+}
+
+static irqreturn_t ath10k_snoc_per_engine_handler(int irq, void *arg)
+{
+	struct ath10k *ar = arg;
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int ce_id = ath10k_snoc_get_ce_id_from_irq(ar, irq);
+
+	if (ce_id < 0 || ce_id >= ARRAY_SIZE(ar_snoc->pipe_info)) {
+		ath10k_warn(ar, "unexpected/invalid irq %d ce_id %d\n", irq,
+			    ce_id);
+		return IRQ_HANDLED;
+	}
+
+	ath10k_snoc_irq_disable(ar);
+	napi_schedule(&ar->napi);
+
+	return IRQ_HANDLED;
+}
+
+static int ath10k_snoc_napi_poll(struct napi_struct *ctx, int budget)
+{
+	struct ath10k *ar = container_of(ctx, struct ath10k, napi);
+	int done = 0;
+
+	ath10k_ce_per_engine_service_any(ar);
+	done = ath10k_htt_txrx_compl_task(ar, budget);
+
+	if (done < budget) {
+		napi_complete(ctx);
+		ath10k_snoc_irq_enable(ar);
+	}
+
+	return done;
+}
+
+void ath10k_snoc_init_napi(struct ath10k *ar)
+{
+	netif_napi_add(&ar->napi_dev, &ar->napi, ath10k_snoc_napi_poll,
+		       ATH10K_NAPI_BUDGET);
+}
+
+static int ath10k_snoc_request_irq(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int irqflags = IRQF_TRIGGER_RISING;
+	int ret, id;
+
+	for (id = 0; id < CE_COUNT_MAX; id++) {
+		ret = request_irq(ar_snoc->ce_irqs[id].irq_line,
+				  ath10k_snoc_per_engine_handler,
+				  irqflags, ce_name[id], ar);
+		if (ret) {
+			ath10k_err(ar,
+				   "failed to register IRQ handler for CE %d: %d",
+				   id, ret);
+			goto err_irq;
+		}
+	}
+
+	return 0;
+
+err_irq:
+	for (id -= 1; id >= 0; id--)
+		free_irq(ar_snoc->ce_irqs[id].irq_line, ar);
+
+	return ret;
+}
+
+static void ath10k_snoc_free_irq(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	int id;
+
+	for (id = 0; id < CE_COUNT_MAX; id++)
+		free_irq(ar_snoc->ce_irqs[id].irq_line, ar);
+}
+
+static int ath10k_snoc_resource_init(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct platform_device *pdev;
+	struct resource *res;
+	int i, ret = 0;
+
+	pdev = ar_snoc->dev;
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "membase");
+	if (!res) {
+		ath10k_err(ar, "Memory base not found in DT\n");
+		return -EINVAL;
+	}
+
+	ar_snoc->mem_pa = res->start;
+	ar_snoc->mem = devm_ioremap(&pdev->dev, ar_snoc->mem_pa,
+				    resource_size(res));
+	if (!ar_snoc->mem) {
+		ath10k_err(ar, "Memory base ioremap failed with physical address %pa\n",
+			   &ar_snoc->mem_pa);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < CE_COUNT; i++) {
+		res = platform_get_resource(ar_snoc->dev, IORESOURCE_IRQ, i);
+		if (!res) {
+			ath10k_err(ar, "failed to get IRQ%d\n", i);
+			ret = -ENODEV;
+			goto out;
+		}
+		ar_snoc->ce_irqs[i].irq_line = res->start;
+	}
+
+out:
+	return ret;
+}
+
+static int ath10k_snoc_setup_resource(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_ce *ce = ath10k_ce_priv(ar);
+	struct ath10k_snoc_pipe *pipe;
+	int i, ret;
+
+	timer_setup(&ar_snoc->rx_post_retry, ath10k_snoc_rx_replenish_retry, 0);
+	spin_lock_init(&ce->ce_lock);
+	for (i = 0; i < CE_COUNT; i++) {
+		pipe = &ar_snoc->pipe_info[i];
+		pipe->ce_hdl = &ce->ce_states[i];
+		pipe->pipe_num = i;
+		pipe->hif_ce_state = ar;
+
+		ret = ath10k_ce_alloc_pipe(ar, i, &host_ce_config_wlan[i]);
+		if (ret) {
+			ath10k_err(ar, "failed to allocate copy engine pipe %d: %d\n",
+				   i, ret);
+			return ret;
+		}
+
+		pipe->buf_sz = host_ce_config_wlan[i].src_sz_max;
+	}
+	ath10k_snoc_init_napi(ar);
+
+	return 0;
+}
+
+static void ath10k_snoc_release_resource(struct ath10k *ar)
+{
+	int i;
+
+	netif_napi_del(&ar->napi);
+	for (i = 0; i < CE_COUNT; i++)
+		ath10k_ce_free_pipe(ar, i);
+}
+
+static int ath10k_get_vreg_info(struct ath10k *ar, struct device *dev,
+				struct ath10k_wcn3990_vreg_info *vreg_info)
+{
+	struct regulator *reg;
+	int ret = 0;
+
+	reg = devm_regulator_get_optional(dev, vreg_info->name);
+
+	if (IS_ERR(reg)) {
+		ret = PTR_ERR(reg);
+
+		if (ret  == -EPROBE_DEFER) {
+			ath10k_err(ar, "EPROBE_DEFER for regulator: %s\n",
+				   vreg_info->name);
+			return ret;
+		}
+		if (vreg_info->required) {
+			ath10k_err(ar, "Regulator %s doesn't exist: %d\n",
+				   vreg_info->name, ret);
+			return ret;
+		}
+		ath10k_dbg(ar, ATH10K_DBG_SNOC,
+			   "Optional regulator %s doesn't exist: %d\n",
+			   vreg_info->name, ret);
+		goto done;
+	}
+
+	vreg_info->reg = reg;
+
+done:
+	ath10k_dbg(ar, ATH10K_DBG_SNOC,
+		   "snog vreg %s min_v %u max_v %u load_ua %u settle_delay %lu\n",
+		   vreg_info->name, vreg_info->min_v, vreg_info->max_v,
+		   vreg_info->load_ua, vreg_info->settle_delay);
+
+	return 0;
+}
+
+static int ath10k_get_clk_info(struct ath10k *ar, struct device *dev,
+			       struct ath10k_wcn3990_clk_info *clk_info)
+{
+	struct clk *handle;
+	int ret = 0;
+
+	handle = devm_clk_get(dev, clk_info->name);
+	if (IS_ERR(handle)) {
+		ret = PTR_ERR(handle);
+		if (clk_info->required) {
+			ath10k_err(ar, "snoc clock %s isn't available: %d\n",
+				   clk_info->name, ret);
+			return ret;
+		}
+		ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc ignoring clock %s: %d\n",
+			   clk_info->name,
+			   ret);
+		return 0;
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc clock %s freq %u\n",
+		   clk_info->name, clk_info->freq);
+
+	clk_info->handle = handle;
+
+	return ret;
+}
+
+static int ath10k_wcn3990_vreg_on(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_wcn3990_vreg_info *vreg_info;
+	int ret = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(vreg_cfg); i++) {
+		vreg_info = &ar_snoc->vreg[i];
+
+		if (!vreg_info->reg)
+			continue;
+
+		ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc regulator %s being enabled\n",
+			   vreg_info->name);
+
+		ret = regulator_set_voltage(vreg_info->reg, vreg_info->min_v,
+					    vreg_info->max_v);
+		if (ret) {
+			ath10k_err(ar,
+				   "failed to set regulator %s voltage-min: %d voltage-max: %d\n",
+				   vreg_info->name, vreg_info->min_v, vreg_info->max_v);
+			goto err_reg_config;
+		}
+
+		if (vreg_info->load_ua) {
+			ret = regulator_set_load(vreg_info->reg,
+						 vreg_info->load_ua);
+			if (ret < 0) {
+				ath10k_err(ar,
+					   "failed to set regulator %s load: %d\n",
+					   vreg_info->name,
+					   vreg_info->load_ua);
+				goto err_reg_config;
+			}
+		}
+
+		ret = regulator_enable(vreg_info->reg);
+		if (ret) {
+			ath10k_err(ar, "failed to enable regulator %s\n",
+				   vreg_info->name);
+			goto err_reg_config;
+		}
+
+		if (vreg_info->settle_delay)
+			udelay(vreg_info->settle_delay);
+	}
+
+	return 0;
+
+err_reg_config:
+	for (; i >= 0; i--) {
+		vreg_info = &ar_snoc->vreg[i];
+
+		if (!vreg_info->reg)
+			continue;
+
+		regulator_disable(vreg_info->reg);
+		regulator_set_load(vreg_info->reg, 0);
+		regulator_set_voltage(vreg_info->reg, 0, vreg_info->max_v);
+	}
+
+	return ret;
+}
+
+static int ath10k_wcn3990_vreg_off(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_wcn3990_vreg_info *vreg_info;
+	int ret = 0;
+	int i;
+
+	for (i = ARRAY_SIZE(vreg_cfg) - 1; i >= 0; i--) {
+		vreg_info = &ar_snoc->vreg[i];
+
+		if (!vreg_info->reg)
+			continue;
+
+		ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc regulator %s being disabled\n",
+			   vreg_info->name);
+
+		ret = regulator_disable(vreg_info->reg);
+		if (ret)
+			ath10k_err(ar, "failed to disable regulator %s\n",
+				   vreg_info->name);
+
+		ret = regulator_set_load(vreg_info->reg, 0);
+		if (ret < 0)
+			ath10k_err(ar, "failed to set load %s\n",
+				   vreg_info->name);
+
+		ret = regulator_set_voltage(vreg_info->reg, 0,
+					    vreg_info->max_v);
+		if (ret)
+			ath10k_err(ar, "failed to set voltage %s\n",
+				   vreg_info->name);
+	}
+
+	return ret;
+}
+
+static int ath10k_wcn3990_clk_init(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_wcn3990_clk_info *clk_info;
+	int ret = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(clk_cfg); i++) {
+		clk_info = &ar_snoc->clk[i];
+
+		if (!clk_info->handle)
+			continue;
+
+		ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc clock %s being enabled\n",
+			   clk_info->name);
+
+		if (clk_info->freq) {
+			ret = clk_set_rate(clk_info->handle, clk_info->freq);
+
+			if (ret) {
+				ath10k_err(ar, "failed to set clock %s freq %u\n",
+					   clk_info->name, clk_info->freq);
+				goto err_clock_config;
+			}
+		}
+
+		ret = clk_prepare_enable(clk_info->handle);
+		if (ret) {
+			ath10k_err(ar, "failed to enable clock %s\n",
+				   clk_info->name);
+			goto err_clock_config;
+		}
+	}
+
+	return 0;
+
+err_clock_config:
+	for (; i >= 0; i--) {
+		clk_info = &ar_snoc->clk[i];
+
+		if (!clk_info->handle)
+			continue;
+
+		clk_disable_unprepare(clk_info->handle);
+	}
+
+	return ret;
+}
+
+static int ath10k_wcn3990_clk_deinit(struct ath10k *ar)
+{
+	struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
+	struct ath10k_wcn3990_clk_info *clk_info;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(clk_cfg); i++) {
+		clk_info = &ar_snoc->clk[i];
+
+		if (!clk_info->handle)
+			continue;
+
+		ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc clock %s being disabled\n",
+			   clk_info->name);
+
+		clk_disable_unprepare(clk_info->handle);
+	}
+
+	return 0;
+}
+
+static int ath10k_hw_power_on(struct ath10k *ar)
+{
+	int ret;
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "soc power on\n");
+
+	ret = ath10k_wcn3990_vreg_on(ar);
+	if (ret)
+		return ret;
+
+	ret = ath10k_wcn3990_clk_init(ar);
+	if (ret)
+		goto vreg_off;
+
+	return ret;
+
+vreg_off:
+	ath10k_wcn3990_vreg_off(ar);
+	return ret;
+}
+
+static int ath10k_hw_power_off(struct ath10k *ar)
+{
+	int ret;
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "soc power off\n");
+
+	ath10k_wcn3990_clk_deinit(ar);
+
+	ret = ath10k_wcn3990_vreg_off(ar);
+
+	return ret;
+}
+
+static const struct of_device_id ath10k_snoc_dt_match[] = {
+	{ .compatible = "qcom,wcn3990-wifi",
+	 .data = &drv_priv,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ath10k_snoc_dt_match);
+
+static int ath10k_snoc_probe(struct platform_device *pdev)
+{
+	const struct ath10k_snoc_drv_priv *drv_data;
+	const struct of_device_id *of_id;
+	struct ath10k_snoc *ar_snoc;
+	struct device *dev;
+	struct ath10k *ar;
+	int ret;
+	u32 i;
+
+	of_id = of_match_device(ath10k_snoc_dt_match, &pdev->dev);
+	if (!of_id) {
+		dev_err(&pdev->dev, "failed to find matching device tree id\n");
+		return -EINVAL;
+	}
+
+	drv_data = of_id->data;
+	dev = &pdev->dev;
+
+	ret = dma_set_mask_and_coherent(dev, drv_data->dma_mask);
+	if (ret) {
+		dev_err(dev, "failed to set dma mask: %d", ret);
+		return ret;
+	}
+
+	ar = ath10k_core_create(sizeof(*ar_snoc), dev, ATH10K_BUS_SNOC,
+				drv_data->hw_rev, &ath10k_snoc_hif_ops);
+	if (!ar) {
+		dev_err(dev, "failed to allocate core\n");
+		return -ENOMEM;
+	}
+
+	ar_snoc = ath10k_snoc_priv(ar);
+	ar_snoc->dev = pdev;
+	platform_set_drvdata(pdev, ar);
+	ar_snoc->ar = ar;
+	ar_snoc->ce.bus_ops = &ath10k_snoc_bus_ops;
+	ar->ce_priv = &ar_snoc->ce;
+
+	ath10k_snoc_resource_init(ar);
+	if (ret) {
+		ath10k_warn(ar, "failed to initialize resource: %d\n", ret);
+		goto err_core_destroy;
+	}
+
+	ath10k_snoc_setup_resource(ar);
+	if (ret) {
+		ath10k_warn(ar, "failed to setup resource: %d\n", ret);
+		goto err_core_destroy;
+	}
+	ret = ath10k_snoc_request_irq(ar);
+	if (ret) {
+		ath10k_warn(ar, "failed to request irqs: %d\n", ret);
+		goto err_release_resource;
+	}
+
+	ar_snoc->vreg = vreg_cfg;
+	for (i = 0; i < ARRAY_SIZE(vreg_cfg); i++) {
+		ret = ath10k_get_vreg_info(ar, dev, &ar_snoc->vreg[i]);
+		if (ret)
+			goto err_free_irq;
+	}
+
+	ar_snoc->clk = clk_cfg;
+	for (i = 0; i < ARRAY_SIZE(clk_cfg); i++) {
+		ret = ath10k_get_clk_info(ar, dev, &ar_snoc->clk[i]);
+		if (ret)
+			goto err_free_irq;
+	}
+
+	ret = ath10k_hw_power_on(ar);
+	if (ret) {
+		ath10k_err(ar, "failed to power on device: %d\n", ret);
+		goto err_free_irq;
+	}
+
+	ret = ath10k_core_register(ar, drv_data->hw_rev);
+	if (ret) {
+		ath10k_err(ar, "failed to register driver core: %d\n", ret);
+		goto err_hw_power_off;
+	}
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc probe\n");
+	ath10k_warn(ar, "Warning: SNOC support is still work-in-progress, it will not work properly!");
+
+	return 0;
+
+err_hw_power_off:
+	ath10k_hw_power_off(ar);
+
+err_free_irq:
+	ath10k_snoc_free_irq(ar);
+
+err_release_resource:
+	ath10k_snoc_release_resource(ar);
+
+err_core_destroy:
+	ath10k_core_destroy(ar);
+
+	return ret;
+}
+
+static int ath10k_snoc_remove(struct platform_device *pdev)
+{
+	struct ath10k *ar = platform_get_drvdata(pdev);
+
+	ath10k_dbg(ar, ATH10K_DBG_SNOC, "snoc remove\n");
+	ath10k_core_unregister(ar);
+	ath10k_hw_power_off(ar);
+	ath10k_snoc_free_irq(ar);
+	ath10k_snoc_release_resource(ar);
+	ath10k_core_destroy(ar);
+
+	return 0;
+}
+
+static struct platform_driver ath10k_snoc_driver = {
+		.probe  = ath10k_snoc_probe,
+		.remove = ath10k_snoc_remove,
+		.driver = {
+			.name   = "ath10k_snoc",
+			.of_match_table = ath10k_snoc_dt_match,
+		},
+};
+
+static int __init ath10k_snoc_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&ath10k_snoc_driver);
+	if (ret)
+		pr_err("failed to register ath10k snoc driver: %d\n",
+		       ret);
+
+	return ret;
+}
+module_init(ath10k_snoc_init);
+
+static void __exit ath10k_snoc_exit(void)
+{
+	platform_driver_unregister(&ath10k_snoc_driver);
+}
+module_exit(ath10k_snoc_exit);
+
+MODULE_AUTHOR("Qualcomm");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("Driver support for Atheros WCN3990 SNOC devices");