From 5503c76aca5462c481a4e2daab6164a9d019ed3f Mon Sep 17 00:00:00 2001
From: "Poddar, Siddarth" <siddpodd@codeaurora.org>
Date: Mon, 10 Apr 2017 12:50:36 +0530
Subject: [PATCH] qcacmn: Add iwpriv pktlog command to clear pktlog buffer

Implement iwpriv pktlog command to clear pktlog buffer.
This command is effective only if pktlog disable is issued previously.
This command needs one argument.
Command to use this feature : iwpriv wlan0 pktlog 4

Change-Id: I431169a10828b6cfcd21c7d8065f325c5eb8cbba
CRs-Fixed: 2031212
---
 utils/pktlog/include/pktlog_ac.h |  5 ++++
 utils/pktlog/pktlog_ac.c         | 45 ++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/utils/pktlog/include/pktlog_ac.h b/utils/pktlog/include/pktlog_ac.h
index 4788db94b6..4d851648f5 100644
--- a/utils/pktlog/include/pktlog_ac.h
+++ b/utils/pktlog/include/pktlog_ac.h
@@ -136,6 +136,7 @@ void pktlog_init(struct hif_opaque_softc *scn);
 int pktlog_enable(struct hif_opaque_softc *scn, int32_t log_state,
 		 bool, uint8_t, uint32_t);
 int pktlog_setsize(struct hif_opaque_softc *scn, int32_t log_state);
+int pktlog_clearbuff(struct hif_opaque_softc *scn, bool clear_buff);
 int pktlog_disable(struct hif_opaque_softc *scn);
 int pktlogmod_init(void *context);
 void pktlogmod_exit(struct ol_txrx_pdev_t *handle);
@@ -172,6 +173,10 @@ static int pktlog_setsize(struct hif_opaque_softc *scn, int32_t log_state)
 {
 	return 0;
 }
+static int pktlog_clearbuff(struct hif_opaque_softc *scn, bool clear_buff)
+{
+	return 0;
+}
 static int pktlog_disable(struct hif_opaque_softc *scn)
 {
 	return 0;
diff --git a/utils/pktlog/pktlog_ac.c b/utils/pktlog/pktlog_ac.c
index 642d44f191..7f70c5b700 100644
--- a/utils/pktlog/pktlog_ac.c
+++ b/utils/pktlog/pktlog_ac.c
@@ -516,6 +516,51 @@ int pktlog_setsize(struct hif_opaque_softc *scn, int32_t size)
 	return 0;
 }
 
+int pktlog_clearbuff(struct hif_opaque_softc *scn, bool clear_buff)
+{
+	ol_txrx_pdev_handle pdev_txrx_handle =
+		cds_get_context(QDF_MODULE_ID_TXRX);
+	struct ol_pktlog_dev_t *pl_dev;
+	struct ath_pktlog_info *pl_info;
+
+	if (pdev_txrx_handle == NULL ||
+			pdev_txrx_handle->pl_dev == NULL ||
+			pdev_txrx_handle->pl_dev->pl_info == NULL)
+		return -EFAULT;
+
+	pl_dev = pdev_txrx_handle->pl_dev;
+	pl_info = pl_dev->pl_info;
+
+	if (!clear_buff)
+		return -EINVAL;
+
+	if (pl_info->log_state) {
+		qdf_print("%s: Logging should be disabled before clearing "
+			  "pktlog buffer.", __func__);
+		return -EINVAL;
+	}
+
+	if (pl_info->buf != NULL) {
+		if (pl_info->buf_size > 0) {
+			qdf_print("%s: pktlog buffer is cleared.", __func__);
+			memset(pl_info->buf, 0, pl_info->buf_size);
+			pl_dev->is_pktlog_cb_subscribed = false;
+			pl_dev->tgt_pktlog_alloced = false;
+			pl_info->buf->rd_offset = -1;
+		} else {
+			qdf_print("%s: pktlog buffer size is not proper. "
+				  "Existing Buf size %d", __func__,
+				  pl_info->buf_size);
+			return -EFAULT;
+		}
+	} else {
+		qdf_print("%s: pktlog buff is NULL", __func__);
+		return -EFAULT;
+	}
+
+	return 0;
+}
+
 /**
  * pktlog_process_fw_msg() - process packetlog message
  * @buff: buffer