Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

1 files changed, 1030 insertions, 0 deletions

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
new file mode 100644
index 000000000..22b08ab05
--- /dev/null
+++ b/drivers/bluetooth/btqca.c
@@ -0,0 +1,1030 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Bluetooth supports for Qualcomm Atheros chips
+ *
+ *  Copyright (c) 2015 The Linux Foundation. All rights reserved.
+ */
+#include <linux/module.h>
+#include <linux/firmware.h>
+#include <linux/vmalloc.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "btqca.h"
+
+int qca_read_soc_version(struct hci_dev *hdev, struct qca_btsoc_version *ver,
+			 enum qca_btsoc_type soc_type)
+{
+	struct sk_buff *skb;
+	struct edl_event_hdr *edl;
+	char cmd;
+	int err = 0;
+	u8 event_type = HCI_EV_VENDOR;
+	u8 rlen = sizeof(*edl) + sizeof(*ver);
+	u8 rtype = EDL_APP_VER_RES_EVT;
+
+	bt_dev_dbg(hdev, "QCA Version Request");
+
+	/* Unlike other SoC's sending version command response as payload to
+	 * VSE event. WCN3991 sends version command response as a payload to
+	 * command complete event.
+	 */
+	if (soc_type >= QCA_WCN3991) {
+		event_type = 0;
+		rlen += 1;
+		rtype = EDL_PATCH_VER_REQ_CMD;
+	}
+
+	cmd = EDL_PATCH_VER_REQ_CMD;
+	skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, EDL_PATCH_CMD_LEN,
+				&cmd, event_type, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "Reading QCA version information failed (%d)",
+			   err);
+		return err;
+	}
+
+	if (skb->len != rlen) {
+		bt_dev_err(hdev, "QCA Version size mismatch len %d", skb->len);
+		err = -EILSEQ;
+		goto out;
+	}
+
+	edl = (struct edl_event_hdr *)(skb->data);
+
+	if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
+	    edl->rtype != rtype) {
+		bt_dev_err(hdev, "QCA Wrong packet received %d %d", edl->cresp,
+			   edl->rtype);
+		err = -EIO;
+		goto out;
+	}
+
+	if (soc_type >= QCA_WCN3991)
+		memcpy(ver, edl->data + 1, sizeof(*ver));
+	else
+		memcpy(ver, &edl->data, sizeof(*ver));
+
+	bt_dev_info(hdev, "QCA Product ID   :0x%08x",
+		    le32_to_cpu(ver->product_id));
+	bt_dev_info(hdev, "QCA SOC Version  :0x%08x",
+		    le32_to_cpu(ver->soc_id));
+	bt_dev_info(hdev, "QCA ROM Version  :0x%08x",
+		    le16_to_cpu(ver->rom_ver));
+	bt_dev_info(hdev, "QCA Patch Version:0x%08x",
+		    le16_to_cpu(ver->patch_ver));
+
+	if (ver->soc_id == 0 || ver->rom_ver == 0)
+		err = -EILSEQ;
+
+out:
+	kfree_skb(skb);
+	if (err)
+		bt_dev_err(hdev, "QCA Failed to get version (%d)", err);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(qca_read_soc_version);
+
+static int qca_read_fw_build_info(struct hci_dev *hdev)
+{
+	struct sk_buff *skb;
+	struct edl_event_hdr *edl;
+	char *build_label;
+	char cmd;
+	int build_lbl_len, err = 0;
+
+	bt_dev_dbg(hdev, "QCA read fw build info");
+
+	cmd = EDL_GET_BUILD_INFO_CMD;
+	skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, EDL_PATCH_CMD_LEN,
+				&cmd, 0, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "Reading QCA fw build info failed (%d)",
+			   err);
+		return err;
+	}
+
+	if (skb->len < sizeof(*edl)) {
+		err = -EILSEQ;
+		goto out;
+	}
+
+	edl = (struct edl_event_hdr *)(skb->data);
+
+	if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
+	    edl->rtype != EDL_GET_BUILD_INFO_CMD) {
+		bt_dev_err(hdev, "QCA Wrong packet received %d %d", edl->cresp,
+			   edl->rtype);
+		err = -EIO;
+		goto out;
+	}
+
+	if (skb->len < sizeof(*edl) + 1) {
+		err = -EILSEQ;
+		goto out;
+	}
+
+	build_lbl_len = edl->data[0];
+
+	if (skb->len < sizeof(*edl) + 1 + build_lbl_len) {
+		err = -EILSEQ;
+		goto out;
+	}
+
+	build_label = kstrndup(&edl->data[1], build_lbl_len, GFP_KERNEL);
+	if (!build_label) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	hci_set_fw_info(hdev, "%s", build_label);
+
+	bt_dev_info(hdev, "QCA FW build version: %s", build_label);
+
+	kfree(build_label);
+out:
+	kfree_skb(skb);
+	return err;
+}
+
+static int qca_send_patch_config_cmd(struct hci_dev *hdev)
+{
+	const u8 cmd[] = { EDL_PATCH_CONFIG_CMD, 0x01, 0, 0, 0 };
+	struct sk_buff *skb;
+	struct edl_event_hdr *edl;
+	int err;
+
+	bt_dev_dbg(hdev, "QCA Patch config");
+
+	skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, sizeof(cmd),
+				cmd, 0, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "Sending QCA Patch config failed (%d)", err);
+		return err;
+	}
+
+	if (skb->len != 2) {
+		bt_dev_err(hdev, "QCA Patch config cmd size mismatch len %d", skb->len);
+		err = -EILSEQ;
+		goto out;
+	}
+
+	edl = (struct edl_event_hdr *)(skb->data);
+
+	if (edl->cresp != EDL_PATCH_CONFIG_RES_EVT || edl->rtype != EDL_PATCH_CONFIG_CMD) {
+		bt_dev_err(hdev, "QCA Wrong packet received %d %d", edl->cresp,
+			   edl->rtype);
+		err = -EIO;
+		goto out;
+	}
+
+	err = 0;
+
+out:
+	kfree_skb(skb);
+	return err;
+}
+
+static int qca_read_fw_board_id(struct hci_dev *hdev, u16 *bid)
+{
+	u8 cmd;
+	struct sk_buff *skb;
+	struct edl_event_hdr *edl;
+	int err = 0;
+
+	cmd = EDL_GET_BID_REQ_CMD;
+	skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, EDL_PATCH_CMD_LEN,
+				&cmd, 0, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "Reading QCA board ID failed (%d)", err);
+		return err;
+	}
+
+	edl = skb_pull_data(skb, sizeof(*edl));
+	if (!edl) {
+		bt_dev_err(hdev, "QCA read board ID with no header");
+		err = -EILSEQ;
+		goto out;
+	}
+
+	if (edl->cresp != EDL_CMD_REQ_RES_EVT ||
+	    edl->rtype != EDL_GET_BID_REQ_CMD) {
+		bt_dev_err(hdev, "QCA Wrong packet: %d %d", edl->cresp, edl->rtype);
+		err = -EIO;
+		goto out;
+	}
+
+	if (skb->len < 3) {
+		err = -EILSEQ;
+		goto out;
+	}
+
+	*bid = (edl->data[1] << 8) + edl->data[2];
+	bt_dev_dbg(hdev, "%s: bid = %x", __func__, *bid);
+
+out:
+	kfree_skb(skb);
+	return err;
+}
+
+int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
+{
+	struct sk_buff *skb;
+	int err;
+
+	bt_dev_dbg(hdev, "QCA pre shutdown cmd");
+
+	skb = __hci_cmd_sync_ev(hdev, QCA_PRE_SHUTDOWN_CMD, 0,
+				NULL, HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
+
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "QCA preshutdown_cmd failed (%d)", err);
+		return err;
+	}
+
+	kfree_skb(skb);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qca_send_pre_shutdown_cmd);
+
+static bool qca_filename_has_extension(const char *filename)
+{
+	const char *suffix = strrchr(filename, '.');
+
+	/* File extensions require a dot, but not as the first or last character */
+	if (!suffix || suffix == filename || *(suffix + 1) == '\0')
+		return 0;
+
+	/* Avoid matching directories with names that look like files with extensions */
+	return !strchr(suffix, '/');
+}
+
+static bool qca_get_alt_nvm_file(char *filename, size_t max_size)
+{
+	char fwname[64];
+	const char *suffix;
+
+	/* nvm file name has an extension, replace with .bin */
+	if (qca_filename_has_extension(filename)) {
+		suffix = strrchr(filename, '.');
+		strscpy(fwname, filename, suffix - filename + 1);
+		snprintf(fwname + (suffix - filename),
+		       sizeof(fwname) - (suffix - filename), ".bin");
+		/* If nvm file is already the default one, return false to skip the retry. */
+		if (strcmp(fwname, filename) == 0)
+			return false;
+
+		snprintf(filename, max_size, "%s", fwname);
+		return true;
+	}
+	return false;
+}
+
+static int qca_tlv_check_data(struct hci_dev *hdev,
+			       struct qca_fw_config *config,
+			       u8 *fw_data, size_t fw_size,
+			       enum qca_btsoc_type soc_type)
+{
+	const u8 *data;
+	u32 type_len;
+	u16 tag_id, tag_len;
+	int idx, length;
+	struct tlv_type_hdr *tlv;
+	struct tlv_type_patch *tlv_patch;
+	struct tlv_type_nvm *tlv_nvm;
+	uint8_t nvm_baud_rate = config->user_baud_rate;
+	u8 type;
+
+	config->dnld_mode = QCA_SKIP_EVT_NONE;
+	config->dnld_type = QCA_SKIP_EVT_NONE;
+
+	switch (config->type) {
+	case ELF_TYPE_PATCH:
+		if (fw_size < 7)
+			return -EINVAL;
+
+		config->dnld_mode = QCA_SKIP_EVT_VSE_CC;
+		config->dnld_type = QCA_SKIP_EVT_VSE_CC;
+
+		bt_dev_dbg(hdev, "File Class        : 0x%x", fw_data[4]);
+		bt_dev_dbg(hdev, "Data Encoding     : 0x%x", fw_data[5]);
+		bt_dev_dbg(hdev, "File version      : 0x%x", fw_data[6]);
+		break;
+	case TLV_TYPE_PATCH:
+		if (fw_size < sizeof(struct tlv_type_hdr) + sizeof(struct tlv_type_patch))
+			return -EINVAL;
+
+		tlv = (struct tlv_type_hdr *)fw_data;
+		type_len = le32_to_cpu(tlv->type_len);
+		tlv_patch = (struct tlv_type_patch *)tlv->data;
+
+		/* For Rome version 1.1 to 3.1, all segment commands
+		 * are acked by a vendor specific event (VSE).
+		 * For Rome >= 3.2, the download mode field indicates
+		 * if VSE is skipped by the controller.
+		 * In case VSE is skipped, only the last segment is acked.
+		 */
+		config->dnld_mode = tlv_patch->download_mode;
+		config->dnld_type = config->dnld_mode;
+
+		BT_DBG("TLV Type\t\t : 0x%x", type_len & 0x000000ff);
+		BT_DBG("Total Length           : %d bytes",
+		       le32_to_cpu(tlv_patch->total_size));
+		BT_DBG("Patch Data Length      : %d bytes",
+		       le32_to_cpu(tlv_patch->data_length));
+		BT_DBG("Signing Format Version : 0x%x",
+		       tlv_patch->format_version);
+		BT_DBG("Signature Algorithm    : 0x%x",
+		       tlv_patch->signature);
+		BT_DBG("Download mode          : 0x%x",
+		       tlv_patch->download_mode);
+		BT_DBG("Reserved               : 0x%x",
+		       tlv_patch->reserved1);
+		BT_DBG("Product ID             : 0x%04x",
+		       le16_to_cpu(tlv_patch->product_id));
+		BT_DBG("Rom Build Version      : 0x%04x",
+		       le16_to_cpu(tlv_patch->rom_build));
+		BT_DBG("Patch Version          : 0x%04x",
+		       le16_to_cpu(tlv_patch->patch_version));
+		BT_DBG("Reserved               : 0x%x",
+		       le16_to_cpu(tlv_patch->reserved2));
+		BT_DBG("Patch Entry Address    : 0x%x",
+		       le32_to_cpu(tlv_patch->entry));
+		break;
+
+	case TLV_TYPE_NVM:
+		if (fw_size < sizeof(struct tlv_type_hdr))
+			return -EINVAL;
+
+		tlv = (struct tlv_type_hdr *)fw_data;
+
+		type_len = le32_to_cpu(tlv->type_len);
+		length = type_len >> 8;
+		type = type_len & 0xff;
+
+		/* Some NVM files have more than one set of tags, only parse
+		 * the first set when it has type 2 for now. When there is
+		 * more than one set there is an enclosing header of type 4.
+		 */
+		if (type == 4) {
+			if (fw_size < 2 * sizeof(struct tlv_type_hdr))
+				return -EINVAL;
+
+			tlv++;
+
+			type_len = le32_to_cpu(tlv->type_len);
+			length = type_len >> 8;
+			type = type_len & 0xff;
+		}
+
+		BT_DBG("TLV Type\t\t : 0x%x", type);
+		BT_DBG("Length\t\t : %d bytes", length);
+
+		if (type != 2)
+			break;
+
+		if (fw_size < length + (tlv->data - fw_data))
+			return -EINVAL;
+
+		idx = 0;
+		data = tlv->data;
+		while (idx + sizeof(struct tlv_type_nvm) <= length) {
+			tlv_nvm = (struct tlv_type_nvm *)(data + idx);
+
+			tag_id = le16_to_cpu(tlv_nvm->tag_id);
+			tag_len = le16_to_cpu(tlv_nvm->tag_len);
+
+			if (length < idx + sizeof(struct tlv_type_nvm) + tag_len)
+				return -EINVAL;
+
+			/* Update NVM tags as needed */
+			switch (tag_id) {
+			case EDL_TAG_ID_BD_ADDR:
+				if (tag_len != sizeof(bdaddr_t))
+					return -EINVAL;
+
+				memcpy(&config->bdaddr, tlv_nvm->data, sizeof(bdaddr_t));
+
+				break;
+
+			case EDL_TAG_ID_HCI:
+				if (tag_len < 3)
+					return -EINVAL;
+
+				/* HCI transport layer parameters
+				 * enabling software inband sleep
+				 * onto controller side.
+				 */
+				tlv_nvm->data[0] |= 0x80;
+
+				/* UART Baud Rate */
+				if (soc_type >= QCA_WCN3991)
+					tlv_nvm->data[1] = nvm_baud_rate;
+				else
+					tlv_nvm->data[2] = nvm_baud_rate;
+
+				break;
+
+			case EDL_TAG_ID_DEEP_SLEEP:
+				if (tag_len < 1)
+					return -EINVAL;
+
+				/* Sleep enable mask
+				 * enabling deep sleep feature on controller.
+				 */
+				tlv_nvm->data[0] |= 0x01;
+
+				break;
+			}
+
+			idx += sizeof(struct tlv_type_nvm) + tag_len;
+		}
+		break;
+
+	default:
+		BT_ERR("Unknown TLV type %d", config->type);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int qca_tlv_send_segment(struct hci_dev *hdev, int seg_size,
+				const u8 *data, enum qca_tlv_dnld_mode mode,
+				enum qca_btsoc_type soc_type)
+{
+	struct sk_buff *skb;
+	struct edl_event_hdr *edl;
+	struct tlv_seg_resp *tlv_resp;
+	u8 cmd[MAX_SIZE_PER_TLV_SEGMENT + 2];
+	int err = 0;
+	u8 event_type = HCI_EV_VENDOR;
+	u8 rlen = (sizeof(*edl) + sizeof(*tlv_resp));
+	u8 rtype = EDL_TVL_DNLD_RES_EVT;
+
+	cmd[0] = EDL_PATCH_TLV_REQ_CMD;
+	cmd[1] = seg_size;
+	memcpy(cmd + 2, data, seg_size);
+
+	if (mode == QCA_SKIP_EVT_VSE_CC || mode == QCA_SKIP_EVT_VSE)
+		return __hci_cmd_send(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2,
+				      cmd);
+
+	/* Unlike other SoC's sending version command response as payload to
+	 * VSE event. WCN3991 sends version command response as a payload to
+	 * command complete event.
+	 */
+	if (soc_type >= QCA_WCN3991) {
+		event_type = 0;
+		rlen = sizeof(*edl);
+		rtype = EDL_PATCH_TLV_REQ_CMD;
+	}
+
+	skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2, cmd,
+				event_type, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "QCA Failed to send TLV segment (%d)", err);
+		return err;
+	}
+
+	if (skb->len != rlen) {
+		bt_dev_err(hdev, "QCA TLV response size mismatch");
+		err = -EILSEQ;
+		goto out;
+	}
+
+	edl = (struct edl_event_hdr *)(skb->data);
+
+	if (edl->cresp != EDL_CMD_REQ_RES_EVT || edl->rtype != rtype) {
+		bt_dev_err(hdev, "QCA TLV with error stat 0x%x rtype 0x%x",
+			   edl->cresp, edl->rtype);
+		err = -EIO;
+	}
+
+	if (soc_type >= QCA_WCN3991)
+		goto out;
+
+	tlv_resp = (struct tlv_seg_resp *)(edl->data);
+	if (tlv_resp->result) {
+		bt_dev_err(hdev, "QCA TLV with error stat 0x%x rtype 0x%x (0x%x)",
+			   edl->cresp, edl->rtype, tlv_resp->result);
+	}
+
+out:
+	kfree_skb(skb);
+
+	return err;
+}
+
+static int qca_inject_cmd_complete_event(struct hci_dev *hdev)
+{
+	struct hci_event_hdr *hdr;
+	struct hci_ev_cmd_complete *evt;
+	struct sk_buff *skb;
+
+	skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = skb_put(skb, sizeof(*hdr));
+	hdr->evt = HCI_EV_CMD_COMPLETE;
+	hdr->plen = sizeof(*evt) + 1;
+
+	evt = skb_put(skb, sizeof(*evt));
+	evt->ncmd = 1;
+	evt->opcode = cpu_to_le16(QCA_HCI_CC_OPCODE);
+
+	skb_put_u8(skb, QCA_HCI_CC_SUCCESS);
+
+	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
+
+	return hci_recv_frame(hdev, skb);
+}
+
+static int qca_download_firmware(struct hci_dev *hdev,
+				 struct qca_fw_config *config,
+				 enum qca_btsoc_type soc_type,
+				 u8 rom_ver)
+{
+	const struct firmware *fw;
+	u8 *data;
+	const u8 *segment;
+	int ret, size, remain, i = 0;
+
+	bt_dev_info(hdev, "QCA Downloading %s", config->fwname);
+
+	ret = request_firmware(&fw, config->fwname, &hdev->dev);
+	if (ret) {
+		/* If the board-specific file is missing, try loading the default
+		 * one, unless that was attempted already.
+		 */
+		if (config->type == TLV_TYPE_NVM &&
+		    qca_get_alt_nvm_file(config->fwname, sizeof(config->fwname))) {
+			bt_dev_info(hdev, "QCA Downloading %s", config->fwname);
+			ret = request_firmware(&fw, config->fwname, &hdev->dev);
+			if (ret) {
+				bt_dev_err(hdev, "QCA Failed to request file: %s (%d)",
+					   config->fwname, ret);
+				return ret;
+			}
+		} else {
+			bt_dev_err(hdev, "QCA Failed to request file: %s (%d)",
+				   config->fwname, ret);
+			return ret;
+		}
+	}
+
+	size = fw->size;
+	data = vmalloc(fw->size);
+	if (!data) {
+		bt_dev_err(hdev, "QCA Failed to allocate memory for file: %s",
+			   config->fwname);
+		release_firmware(fw);
+		return -ENOMEM;
+	}
+
+	memcpy(data, fw->data, size);
+	release_firmware(fw);
+
+	ret = qca_tlv_check_data(hdev, config, data, size, soc_type);
+	if (ret)
+		goto out;
+
+	segment = data;
+	remain = size;
+	while (remain > 0) {
+		int segsize = min(MAX_SIZE_PER_TLV_SEGMENT, remain);
+
+		bt_dev_dbg(hdev, "Send segment %d, size %d", i++, segsize);
+
+		remain -= segsize;
+		/* The last segment is always acked regardless download mode */
+		if (!remain || segsize < MAX_SIZE_PER_TLV_SEGMENT)
+			config->dnld_mode = QCA_SKIP_EVT_NONE;
+
+		ret = qca_tlv_send_segment(hdev, segsize, segment,
+					   config->dnld_mode, soc_type);
+		if (ret)
+			goto out;
+
+		segment += segsize;
+	}
+
+	/* Latest qualcomm chipsets are not sending a command complete event
+	 * for every fw packet sent. They only respond with a vendor specific
+	 * event for the last packet. This optimization in the chip will
+	 * decrease the BT in initialization time. Here we will inject a command
+	 * complete event to avoid a command timeout error message.
+	 */
+	if (config->dnld_type == QCA_SKIP_EVT_VSE_CC ||
+	    config->dnld_type == QCA_SKIP_EVT_VSE)
+		ret = qca_inject_cmd_complete_event(hdev);
+
+out:
+	vfree(data);
+
+	return ret;
+}
+
+static int qca_disable_soc_logging(struct hci_dev *hdev)
+{
+	struct sk_buff *skb;
+	u8 cmd[2];
+	int err;
+
+	cmd[0] = QCA_DISABLE_LOGGING_SUB_OP;
+	cmd[1] = 0x00;
+	skb = __hci_cmd_sync_ev(hdev, QCA_DISABLE_LOGGING, sizeof(cmd), cmd,
+				HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "QCA Failed to disable soc logging(%d)", err);
+		return err;
+	}
+
+	kfree_skb(skb);
+
+	return 0;
+}
+
+int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+	struct sk_buff *skb;
+	u8 cmd[9];
+	int err;
+
+	cmd[0] = EDL_NVM_ACCESS_SET_REQ_CMD;
+	cmd[1] = 0x02; 			/* TAG ID */
+	cmd[2] = sizeof(bdaddr_t);	/* size */
+	memcpy(cmd + 3, bdaddr, sizeof(bdaddr_t));
+	skb = __hci_cmd_sync_ev(hdev, EDL_NVM_ACCESS_OPCODE, sizeof(cmd), cmd,
+				HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "QCA Change address command failed (%d)", err);
+		return err;
+	}
+
+	kfree_skb(skb);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
+
+static int qca_check_bdaddr(struct hci_dev *hdev, const struct qca_fw_config *config)
+{
+	struct hci_rp_read_bd_addr *bda;
+	struct sk_buff *skb;
+	int err;
+
+	if (bacmp(&hdev->public_addr, BDADDR_ANY))
+		return 0;
+
+	skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
+			     HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "Failed to read device address (%d)", err);
+		return err;
+	}
+
+	if (skb->len != sizeof(*bda)) {
+		bt_dev_err(hdev, "Device address length mismatch");
+		kfree_skb(skb);
+		return -EIO;
+	}
+
+	bda = (struct hci_rp_read_bd_addr *)skb->data;
+	if (!bacmp(&bda->bdaddr, &config->bdaddr))
+		hci_set_quirk(hdev, HCI_QUIRK_USE_BDADDR_PROPERTY);
+
+	kfree_skb(skb);
+
+	return 0;
+}
+
+static void qca_get_nvm_name_by_board(char *fwname, size_t max_size,
+		const char *stem, enum qca_btsoc_type soc_type,
+		struct qca_btsoc_version ver, u8 rom_ver, u16 bid)
+{
+	const char *variant;
+	const char *prefix;
+
+	/* Set the default value to variant and prefix */
+	variant = "";
+	prefix = "b";
+
+	if (soc_type == QCA_QCA2066)
+		prefix = "";
+
+	if (soc_type == QCA_WCN6855 || soc_type == QCA_QCA2066) {
+		/* If the chip is manufactured by GlobalFoundries */
+		if ((le32_to_cpu(ver.soc_id) & QCA_HSP_GF_SOC_MASK) == QCA_HSP_GF_SOC_ID)
+			variant = "g";
+	}
+
+	if (rom_ver != 0) {
+		if (bid == 0x0 || bid == 0xffff)
+			snprintf(fwname, max_size, "qca/%s%02x%s.bin", stem, rom_ver, variant);
+		else
+			snprintf(fwname, max_size, "qca/%s%02x%s.%s%02x", stem, rom_ver,
+						variant, prefix, bid);
+	} else {
+		if (bid == 0x0 || bid == 0xffff)
+			snprintf(fwname, max_size, "qca/%s%s.bin", stem, variant);
+		else
+			snprintf(fwname, max_size, "qca/%s%s.%s%02x", stem, variant, prefix, bid);
+	}
+}
+
+int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
+		   enum qca_btsoc_type soc_type, struct qca_btsoc_version ver,
+		   const char *firmware_name, const char *rampatch_name)
+{
+	struct qca_fw_config config = {};
+	const char *variant = "";
+	int err;
+	u8 rom_ver = 0;
+	u32 soc_ver;
+	u16 boardid = 0;
+
+	bt_dev_dbg(hdev, "QCA setup on UART");
+
+	soc_ver = get_soc_ver(ver.soc_id, ver.rom_ver);
+
+	bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
+
+	config.user_baud_rate = baudrate;
+
+	/* Firmware files to download are based on ROM version.
+	 * ROM version is derived from last two bytes of soc_ver.
+	 */
+	if (soc_type == QCA_WCN3988)
+		rom_ver = ((soc_ver & 0x00000f00) >> 0x05) | (soc_ver & 0x0000000f);
+	else if (soc_type == QCA_WCN3998)
+		rom_ver = ((soc_ver & 0x0000f000) >> 0x07) | (soc_ver & 0x0000000f);
+	else
+		rom_ver = ((soc_ver & 0x00000f00) >> 0x04) | (soc_ver & 0x0000000f);
+
+	if (soc_type == QCA_WCN6750)
+		qca_send_patch_config_cmd(hdev);
+
+	/* Download rampatch file */
+	config.type = TLV_TYPE_PATCH;
+	if (rampatch_name) {
+		snprintf(config.fwname, sizeof(config.fwname), "qca/%s", rampatch_name);
+	} else {
+		switch (soc_type) {
+		case QCA_QCA2066:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/hpbtfw%02x.tlv", rom_ver);
+			break;
+		case QCA_QCA6390:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/htbtfw%02x.tlv", rom_ver);
+			break;
+		case QCA_WCN3950:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/cmbtfw%02x.tlv", rom_ver);
+			break;
+		case QCA_WCN3990:
+		case QCA_WCN3991:
+		case QCA_WCN3998:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/crbtfw%02x.tlv", rom_ver);
+			break;
+		case QCA_WCN3988:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/apbtfw%02x.tlv", rom_ver);
+			break;
+		case QCA_WCN6750:
+			/* Choose mbn file by default.If mbn file is not found
+			 * then choose tlv file
+			 */
+			config.type = ELF_TYPE_PATCH;
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/msbtfw%02x.mbn", rom_ver);
+			break;
+		case QCA_WCN6855:
+			/* Due to historical reasons, WCN685x chip has been using firmware
+			 * without the "wcn" prefix. The mapping between the chip and its
+			 * corresponding firmware has now been corrected.
+			 */
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/wcnhpbtfw%02x.tlv", rom_ver);
+			break;
+		case QCA_WCN7850:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/hmtbtfw%02x.tlv", rom_ver);
+			break;
+		default:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/rampatch_%08x.bin", soc_ver);
+		}
+	}
+
+	err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
+	/* For WCN6750, if mbn file is not present then check for
+	 * tlv file.
+	 */
+	if (err < 0 && soc_type == QCA_WCN6750) {
+		bt_dev_dbg(hdev, "QCA Failed to request file: %s (%d)",
+			   config.fwname, err);
+		config.type = TLV_TYPE_PATCH;
+		snprintf(config.fwname, sizeof(config.fwname),
+			 "qca/msbtfw%02x.tlv", rom_ver);
+		bt_dev_info(hdev, "QCA Downloading %s", config.fwname);
+		err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
+	} else if (err < 0 && !rampatch_name && soc_type == QCA_WCN6855) {
+		snprintf(config.fwname, sizeof(config.fwname),
+			 "qca/hpbtfw%02x.tlv", rom_ver);
+		err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
+	}
+
+	if (err < 0) {
+		bt_dev_err(hdev, "QCA Failed to request file: %s (%d)",
+			   config.fwname, err);
+		return err;
+	}
+
+	/* Give the controller some time to get ready to receive the NVM */
+	msleep(10);
+
+	if (soc_type == QCA_QCA2066 || soc_type == QCA_WCN7850)
+		qca_read_fw_board_id(hdev, &boardid);
+
+	/* Download NVM configuration */
+	config.type = TLV_TYPE_NVM;
+	if (firmware_name) {
+		/* The firmware name has an extension, use it directly */
+		if (qca_filename_has_extension(firmware_name)) {
+			snprintf(config.fwname, sizeof(config.fwname), "qca/%s", firmware_name);
+		} else {
+			qca_read_fw_board_id(hdev, &boardid);
+			qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),
+				 firmware_name, soc_type, ver, 0, boardid);
+		}
+	} else {
+		switch (soc_type) {
+		case QCA_QCA2066:
+			qca_get_nvm_name_by_board(config.fwname,
+						  sizeof(config.fwname),
+						  "hpnv", soc_type, ver,
+						  rom_ver, boardid);
+			break;
+		case QCA_QCA6390:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/htnv%02x.bin", rom_ver);
+			break;
+		case QCA_WCN3950:
+			if (le32_to_cpu(ver.soc_id) == QCA_WCN3950_SOC_ID_T)
+				variant = "t";
+			else if (le32_to_cpu(ver.soc_id) == QCA_WCN3950_SOC_ID_S)
+				variant = "s";
+
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/cmnv%02x%s.bin", rom_ver, variant);
+			break;
+		case QCA_WCN3990:
+		case QCA_WCN3991:
+		case QCA_WCN3998:
+			if (le32_to_cpu(ver.soc_id) == QCA_WCN3991_SOC_ID)
+				variant = "u";
+
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/crnv%02x%s.bin", rom_ver, variant);
+			break;
+		case QCA_WCN3988:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/apnv%02x.bin", rom_ver);
+			break;
+		case QCA_WCN6750:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/msnv%02x.bin", rom_ver);
+			break;
+		case QCA_WCN6855:
+			qca_read_fw_board_id(hdev, &boardid);
+			qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),
+						  "wcnhpnv", soc_type, ver, rom_ver, boardid);
+			break;
+		case QCA_WCN7850:
+			qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),
+				 "hmtnv", soc_type, ver, rom_ver, boardid);
+			break;
+		default:
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/nvm_%08x.bin", soc_ver);
+		}
+	}
+
+	err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
+	if (err < 0 && !firmware_name && soc_type == QCA_WCN6855) {
+		qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),
+					  "hpnv", soc_type, ver, rom_ver, boardid);
+		err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
+	}
+
+	if (err < 0) {
+		bt_dev_err(hdev, "QCA Failed to request file: %s (%d)",
+			   config.fwname, err);
+		return err;
+	}
+
+	switch (soc_type) {
+	case QCA_QCA2066:
+	case QCA_QCA6390:
+	case QCA_WCN3991:
+	case QCA_WCN6750:
+	case QCA_WCN6855:
+	case QCA_WCN7850:
+		err = qca_disable_soc_logging(hdev);
+		if (err < 0)
+			return err;
+		break;
+	default:
+		break;
+	}
+
+	/* WCN399x and WCN6750 supports the Microsoft vendor extension with 0xFD70 as the
+	 * VsMsftOpCode.
+	 */
+	switch (soc_type) {
+	case QCA_WCN3950:
+	case QCA_WCN3988:
+	case QCA_WCN3990:
+	case QCA_WCN3991:
+	case QCA_WCN3998:
+	case QCA_WCN6750:
+		hci_set_msft_opcode(hdev, 0xFD70);
+		break;
+	default:
+		break;
+	}
+
+	/* Perform HCI reset */
+	err = __hci_reset_sync(hdev);
+	if (err < 0) {
+		bt_dev_err(hdev, "QCA Failed to run HCI_RESET (%d)", err);
+		return err;
+	}
+	bt_dev_dbg(hdev, "QCA HCI_RESET succeed");
+
+	switch (soc_type) {
+	case QCA_WCN3991:
+	case QCA_WCN6750:
+	case QCA_WCN6855:
+	case QCA_WCN7850:
+		/* get fw build info */
+		err = qca_read_fw_build_info(hdev);
+		if (err < 0)
+			return err;
+		break;
+	default:
+		break;
+	}
+
+	err = qca_check_bdaddr(hdev, &config);
+	if (err)
+		return err;
+
+	bt_dev_info(hdev, "QCA setup on UART is completed");
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qca_uart_setup);
+
+int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+	bdaddr_t bdaddr_swapped;
+	struct sk_buff *skb;
+	int err;
+
+	baswap(&bdaddr_swapped, bdaddr);
+
+	skb = __hci_cmd_sync_ev(hdev, EDL_WRITE_BD_ADDR_OPCODE, 6,
+				&bdaddr_swapped, 0, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "QCA Change address cmd failed (%d)", err);
+		return err;
+	}
+
+	kfree_skb(skb);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qca_set_bdaddr);
+
+
+MODULE_AUTHOR("Ben Young Tae Kim <ytkim@qca.qualcomm.com>");
+MODULE_DESCRIPTION("Bluetooth support for Qualcomm Atheros family");
+MODULE_LICENSE("GPL");