qcacld-3.0: Implement API to set dpt params debugfs

Implement API to set dp trace params debugfs which
sets  proto bitmap, num of records and verbosity
in the same order. API expects exactly 3 params to be
passed in the same order.

CRs-Fixed: 2184740
Change-Id: Ia802243bbd2e9d985a58ccf913d9cfbe3d71c8a8

core/dp/txrx/ol_txrx.c

@@ -85,6 +85,20 @@
 				QDF_FILE_GRP_READ |	\
 				QDF_FILE_OTH_READ)
 
+#define DPT_DEBUGFS_NUMBER_BASE	10
+/**
+ * enum dpt_set_param_debugfs - dpt set params
+ * @DPT_SET_PARAM_PROTO_BITMAP : set proto bitmap
+ * @DPT_SET_PARAM_NR_RECORDS: set num of records
+ * @DPT_SET_PARAM_VERBOSITY: set verbosity
+ */
+enum dpt_set_param_debugfs {
+	DPT_SET_PARAM_PROTO_BITMAP = 1,
+	DPT_SET_PARAM_NR_RECORDS = 2,
+	DPT_SET_PARAM_VERBOSITY = 3,
+	DPT_SET_PARAM_MAX,
+};
+
 QDF_STATUS ol_txrx_peer_state_update(struct cdp_pdev *pdev,
 				     uint8_t *peer_mac,
 				     enum ol_txrx_peer_state state);
@@ -1206,6 +1220,88 @@ static QDF_STATUS ol_txrx_read_dpt_buff_debugfs(qdf_debugfs_file_t file,
 	return status;
 }
 
+/**
+ * ol_txrx_conv_str_to_int_debugfs() - convert string to int
+ * @buf: buffer containing string
+ * @len: buffer len
+ * @proto_bitmap: defines the protocol to be tracked
+ * @nr_records: defines the nth packet which is traced
+ * @verbosity: defines the verbosity level
+ *
+ * This function expects char buffer to be null terminated.
+ * Otherwise results could be unexpected values.
+ *
+ * Return: 0 on success
+ */
+static int ol_txrx_conv_str_to_int_debugfs(char *buf, qdf_size_t len,
+					   int *proto_bitmap,
+					   int *nr_records,
+					   int *verbosity)
+{
+	int num_value = DPT_SET_PARAM_PROTO_BITMAP;
+	int ret, param_value = 0;
+	char *buf_param = buf;
+	int i;
+
+	for (i = 1; i < DPT_SET_PARAM_MAX; i++) {
+		/* Loop till you reach space as kstrtoint operates till
+		 * null character. Replace space with null character
+		 * to read each value.
+		 * terminate the loop either at null terminated char or
+		 * len is 0.
+		 */
+		while (*buf && len) {
+			if (*buf == ' ') {
+				*buf = '\0';
+				buf++;
+				len--;
+				break;
+			}
+			buf++;
+			len--;
+		}
+		/* get the parameter */
+		ret = qdf_kstrtoint(buf_param,
+				    DPT_DEBUGFS_NUMBER_BASE,
+				    &param_value);
+		if (ret) {
+			QDF_TRACE(QDF_MODULE_ID_TXRX,
+				  QDF_TRACE_LEVEL_ERROR,
+				  "%s: Error while parsing buffer. ret %d",
+				  __func__, ret);
+			return ret;
+		}
+		switch (num_value) {
+		case DPT_SET_PARAM_PROTO_BITMAP:
+			*proto_bitmap = param_value;
+			break;
+		case DPT_SET_PARAM_NR_RECORDS:
+			*nr_records = param_value;
+			break;
+		case DPT_SET_PARAM_VERBOSITY:
+			*verbosity = param_value;
+			break;
+		default:
+			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
+				  "%s %d: :Set command needs exactly 3 arguments in format <proto_bitmap> <number of record> <Verbosity>.",
+				__func__, __LINE__);
+			break;
+		}
+		num_value++;
+		/*buf_param should now point to the next param value. */
+		buf_param = buf;
+	}
+
+	/* buf is not yet NULL implies more than 3 params are passed. */
+	if (*buf) {
+		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
+			  "%s %d: :Set command needs exactly 3 arguments in format <proto_bitmap> <number of record> <Verbosity>.",
+			__func__, __LINE__);
+		return -EINVAL;
+	}
+	return 0;
+}
+
 /**
  * ol_txrx_write_dpt_buff_debugfs() - set dp trace parameters
  * @priv: pdev object
@@ -1218,6 +1314,36 @@ static QDF_STATUS ol_txrx_write_dpt_buff_debugfs(void *priv,
 					      const char *buf,
 					      qdf_size_t len)
 {
+	int ret;
+	int proto_bitmap = 0;
+	int nr_records = 0;
+	int verbosity = 0;
+	char *buf1 = NULL;
+
+	if (!buf || !len) {
+		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
+			  "%s: null buffer or len. len %u",
+				__func__, (uint8_t)len);
+		return QDF_STATUS_E_FAULT;
+	}
+
+	buf1 = (char *)qdf_mem_malloc(len);
+	if (!buf1) {
+		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
+			  "%s: qdf_mem_malloc failure",
+				__func__);
+		return QDF_STATUS_E_FAULT;
+	}
+	qdf_mem_copy(buf1, buf, len);
+	ret = ol_txrx_conv_str_to_int_debugfs(buf1, len, &proto_bitmap,
+					      &nr_records, &verbosity);
+	if (ret) {
+		qdf_mem_free(buf1);
+		return QDF_STATUS_E_INVAL;
+	}
+
+	qdf_dpt_set_value_debugfs(proto_bitmap, nr_records, verbosity);
+	qdf_mem_free(buf1);
 	return QDF_STATUS_SUCCESS;
 }