qcacmn: Control path support for Spectral DMA debug

All gen III chipsets use Direct-DMA mechanism to copy Spectral reports to
the Host for further processing. This mechanism involves ring and buffer
management in the Host, FW, and uCode, where improper/incomplete DMA and
improper tail update issues are seen. DBR framework provides support to
debug such issues. Add Spectral control path support to facilitate the
configuration of these debug options.

CRs-Fixed: 2478596 2478595
Change-Id: I094616c4137145389b6984ccab933e5ebd0aa1ab

os_if/linux/spectral/inc/wlan_cfg80211_spectral.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017, 2019 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
@@ -135,4 +135,17 @@ int wlan_cfg80211_spectral_scan_get_status(struct wiphy *wiphy,
 					   struct wlan_objmgr_pdev *pdev,
 					   const void *data,
 					   int data_len);
+
+/**
+ * wlan_cfg80211_spectral_scan_dma_debug_config() - configure DMA debug
+ * @pdev:       Pointer to pdev
+ * @tb:         Pointer to Spectral Scan config attribute
+ * @sscan_mode: Spectral scan mode
+ *
+ * Return QDF_STATUS_SUCCESS on success, QDF_STATUS_E_FAILURE on failure
+ */
+QDF_STATUS wlan_cfg80211_spectral_scan_dma_debug_config(
+		struct wlan_objmgr_pdev *pdev,
+		struct nlattr **tb,
+		enum spectral_scan_mode sscan_mode);
 #endif

os_if/linux/spectral/src/wlan_cfg80211_spectral.c

@@ -84,7 +84,11 @@ static const struct nla_policy spectral_scan_policy[
 	[QCA_WLAN_VENDOR_ATTR_SPECTRAL_SCAN_CONFIG_FREQUENCY] = {
 							.type = NLA_U32},
 	[QCA_WLAN_VENDOR_ATTR_SPECTRAL_SCAN_MODE] = {
-						.type = NLA_U32},
+							.type = NLA_U32},
+	[QCA_WLAN_VENDOR_ATTR_SPECTRAL_SCAN_CONFIG_DMA_RING_DEBUG] = {
+							.type = NLA_U8},
+	[QCA_WLAN_VENDOR_ATTR_SPECTRAL_SCAN_CONFIG_DMA_BUFFER_DEBUG] = {
+							.type = NLA_U8},
 };
 
 static void wlan_spectral_intit_config(struct spectral_config *config_req)
@@ -182,6 +186,57 @@ convert_spectral_err_code_internal_to_nl
 	return QDF_STATUS_SUCCESS;
 }
 
+#ifdef DIRECT_BUF_RX_DEBUG
+QDF_STATUS wlan_cfg80211_spectral_scan_dma_debug_config(
+	struct wlan_objmgr_pdev *pdev,
+	struct nlattr **tb,
+	enum spectral_scan_mode sscan_mode)
+{
+	struct spectral_cp_request sscan_req;
+	uint8_t dma_debug_enable;
+	QDF_STATUS status;
+
+	if (!tb || !pdev)
+		return QDF_STATUS_E_FAILURE;
+
+	if (tb[QCA_WLAN_VENDOR_ATTR_SPECTRAL_SCAN_CONFIG_DMA_RING_DEBUG]) {
+		dma_debug_enable = nla_get_u8(tb[
+		   QCA_WLAN_VENDOR_ATTR_SPECTRAL_SCAN_CONFIG_DMA_RING_DEBUG]);
+		sscan_req.ss_mode = sscan_mode;
+		sscan_req.dma_debug_req.dma_debug_enable = !!dma_debug_enable;
+		sscan_req.dma_debug_req.dma_debug_type =
+				SPECTRAL_DMA_RING_DEBUG;
+		sscan_req.req_id = SPECTRAL_SET_DMA_DEBUG;
+		status = ucfg_spectral_control(pdev, &sscan_req);
+		if (status != QDF_STATUS_SUCCESS) {
+			osif_err("Could not configure dma ring debug");
+			return QDF_STATUS_E_FAILURE;
+		}
+	}
+
+	if (tb[QCA_WLAN_VENDOR_ATTR_SPECTRAL_SCAN_CONFIG_DMA_BUFFER_DEBUG]) {
+		dma_debug_enable = nla_get_u8(tb[
+		   QCA_WLAN_VENDOR_ATTR_SPECTRAL_SCAN_CONFIG_DMA_BUFFER_DEBUG]);
+		sscan_req.ss_mode = sscan_mode;
+		sscan_req.dma_debug_req.dma_debug_enable = !!dma_debug_enable;
+		sscan_req.dma_debug_req.dma_debug_type =
+				SPECTRAL_DMA_BUFFER_DEBUG;
+		sscan_req.req_id = SPECTRAL_SET_DMA_DEBUG;
+		return ucfg_spectral_control(pdev, &sscan_req);
+	}
+
+	return QDF_STATUS_SUCCESS;
+}
+#else
+QDF_STATUS wlan_cfg80211_spectral_scan_dma_debug_config(
+	struct wlan_objmgr_pdev *pdev,
+	struct nlattr **tb,
+	enum spectral_scan_mode sscan_mode)
+{
+	return QDF_STATUS_SUCCESS;
+}
+#endif /* DIRECT_BUF_RX_DEBUG */
+
 int wlan_cfg80211_spectral_scan_config_and_start(struct wiphy *wiphy,
 						 struct wlan_objmgr_pdev *pdev,
 						 const void *data,
@@ -328,6 +383,11 @@ int wlan_cfg80211_spectral_scan_config_and_start(struct wiphy *wiphy,
 		return -ENOMEM;
 	}
 
+	status = wlan_cfg80211_spectral_scan_dma_debug_config(
+			pdev, tb, sscan_mode);
+	if (QDF_IS_STATUS_ERROR(status))
+		return -EINVAL;
+
 	if (CONFIG_REQUESTED(scan_req_type)) {
 		sscan_req.ss_mode = sscan_mode;
 		sscan_req.req_id = SPECTRAL_SET_CONFIG;