qca-wifi: Create framework for RNR 6Ghz operations

For handling 6Ghz RNR related operations create
new file.
The helper functions are used to update and maintain
global context of lower band vdev count, 6Ghz vdev
count and pointer to 6Ghz pdev.
This will provide global access to 6Ghz pdev and
avoid finding this pdev through iterations over
SoC and Pdevs.
Finding lower band vdev count can be tricky as
it involves iteration over SoC, Pdev and Vdev.
Keeping global counter optimizes the approach to
access without multiple iterations.

Change-Id: Ic9782e517d8a87d4806b93dd4779cd54366316cb

umac/rnr/inc/wlan_rnr.h

@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2020 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.
+ */
+
+#ifndef _WLAN_RNR_H_
+#define _WLAN_RNR_H_
+#include <qdf_atomic.h>
+#include <wlan_objmgr_pdev_obj.h>
+
+/**
+ * struct rnr_global_info - Global context for RNR
+ * @vdev_lower_band_cnt:    5ghz/2ghz vdev count
+ * @vdev_6ghz_band_cnt:     6ghz vdev count
+ * @pdev_6ghz_ctx:          6Ghz pdev context
+ */
+struct rnr_global_info {
+	qdf_atomic_t vdev_lower_band_cnt;
+	qdf_atomic_t vdev_6ghz_band_cnt;
+	uint32_t rnr_mbss_idx_map;
+	struct wlan_objmgr_pdev *pdev_6ghz_ctx;
+};
+
+/**
+ * wlan_rnr_lower_band_vdev_inc - Atomic increment of
+ *				  global lower band vdev counter
+ *
+ * API to increment global lower band vdev counter
+ *
+ * Return:void
+ */
+void wlan_rnr_lower_band_vdev_inc(void);
+
+/**
+ * wlan_rnr_lower_band_vdev_dec - Atomic decrement of
+ *				  global lower band vdev counter
+ *
+ * API to decrement global lower band vdev counter
+ *
+ * Return:void
+ */
+void wlan_rnr_lower_band_vdev_dec(void);
+
+/**
+ * wlan_rnr_6ghz_vdev_inc - Atomic increment of
+ *			    6ghz vdev counter
+ *
+ * API to increment of 6Ghz vdev counter
+ *
+ * Return:void
+ */
+void wlan_rnr_6ghz_vdev_inc(void);
+
+/**
+ * wlan_rnr_6ghz_vdev_dec - Atomic decrement of
+ *			    6ghz vdev counter
+ *
+ * API to decrement of 6Ghz vdev counter
+ *
+ * Return:void
+ */
+void wlan_rnr_6ghz_vdev_dec(void);
+
+/**
+ * wlan_global_6ghz_pdev_set - Store 6Ghz pdev in
+ *			       global context
+ *
+ * API to save 6Ghz pdev in global context for
+ * faster access
+ *
+ * Return:void
+ */
+void wlan_global_6ghz_pdev_set(struct wlan_objmgr_pdev *pdev);
+
+/**
+ * wlan_global_6ghz_pdev_destroy - Delete 6Ghz pdev in
+ *				   global context
+ *
+ * API to delete 6Ghz pdev in global context for
+ * faster access
+ *
+ * Return:void
+ */
+void wlan_global_6ghz_pdev_destroy(void);
+
+/**
+ * wlan_lower_band_ap_cnt_get - Get lower band AP count
+ *
+ * API to get lower band vdev from global context for
+ * faster access
+ *
+ * Return: int32_t
+ */
+int32_t wlan_lower_band_ap_cnt_get(void);
+
+/**
+ * wlan_rnr_init_cnt - Initialize counters for
+ *			6Ghz vdev and lower band vdev
+ *
+ * API to initialize atomic counters used for 6Ghz vdev
+ * and lower band vdev
+ *
+ * Return: void
+ */
+void wlan_rnr_init_cnt(void);
+
+/**
+ * wlan_gbl_6ghz_pdev_get - Retrieve 6Ghz pdev pointer
+ *
+ * API to get 6Ghz pdev pointer
+ *
+ * Return: struct wlan_objmgr_pdev
+ */
+struct wlan_objmgr_pdev *wlan_gbl_6ghz_pdev_get(void);
+
+/**
+ * wlan_rnr_set_bss_idx - Set bit corresponding to bss index
+ *
+ * API to set bss index bitmap for adding Non Tx APs
+ * not included in Mbss IE in the RNR IE
+ *
+ * Return: void
+ */
+void wlan_rnr_set_bss_idx(uint32_t bss_idx);
+
+/**
+ * wlan_rnr_get_bss_idx - Get bit corresponding to bss index
+ *
+ * API to Get bss index bitmap for adding Non Tx APs
+ * not included in Mbss IE in the RNR IE
+ *
+ * Return: void
+ */
+uint32_t wlan_rnr_get_bss_idx(void);
+
+/**
+ * wlan_rnr_clear_bss_idx - Clear bits corresponding to bss index map
+ *
+ * API to clear bss index bitmap for adding Non Tx APs
+ * not included in Mbss IE in the RNR IE
+ *
+ * Return: void
+ */
+void wlan_rnr_clear_bss_idx(void);
+
+#endif /* End of _WLAN_RNR_H_ */

umac/rnr/src/wlan_rnr.c

@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2020 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 <wlan_rnr.h>
+#include <qdf_module.h>
+#include <qdf_status.h>
+#include <qdf_types.h>
+
+struct rnr_global_info g_rnr_info;
+
+void wlan_rnr_init_cnt(void)
+{
+	qdf_atomic_init(&(g_rnr_info.vdev_lower_band_cnt));
+	qdf_atomic_init(&(g_rnr_info.vdev_6ghz_band_cnt));
+}
+
+qdf_export_symbol(wlan_rnr_init_cnt);
+
+void wlan_rnr_lower_band_vdev_inc(void)
+{
+	qdf_atomic_inc(&(g_rnr_info.vdev_lower_band_cnt));
+}
+
+qdf_export_symbol(wlan_rnr_lower_band_vdev_inc);
+
+void wlan_rnr_lower_band_vdev_dec(void)
+{
+	qdf_atomic_dec(&(g_rnr_info.vdev_lower_band_cnt));
+}
+
+qdf_export_symbol(wlan_rnr_lower_band_vdev_dec);
+
+void wlan_rnr_6ghz_vdev_inc(void)
+{
+	qdf_atomic_inc(&(g_rnr_info.vdev_6ghz_band_cnt));
+}
+
+qdf_export_symbol(wlan_rnr_6ghz_vdev_inc);
+
+void wlan_rnr_6ghz_vdev_dec(void)
+{
+	qdf_atomic_dec(&(g_rnr_info.vdev_6ghz_band_cnt));
+}
+
+qdf_export_symbol(wlan_rnr_6ghz_vdev_dec);
+
+void wlan_global_6ghz_pdev_set(struct wlan_objmgr_pdev *pdev)
+{
+	if (pdev)
+		g_rnr_info.pdev_6ghz_ctx = pdev;
+}
+
+qdf_export_symbol(wlan_global_6ghz_pdev_set);
+
+void wlan_global_6ghz_pdev_destroy(void)
+{
+	g_rnr_info.pdev_6ghz_ctx = NULL;
+}
+
+qdf_export_symbol(wlan_global_6ghz_pdev_destroy);
+
+int32_t wlan_lower_band_ap_cnt_get(void)
+{
+	return qdf_atomic_read(&(g_rnr_info.vdev_lower_band_cnt));
+}
+
+qdf_export_symbol(wlan_lower_band_ap_cnt_get);
+
+struct wlan_objmgr_pdev *wlan_gbl_6ghz_pdev_get(void)
+{
+	return g_rnr_info.pdev_6ghz_ctx;
+}
+
+qdf_export_symbol(wlan_gbl_6ghz_pdev_get);
+
+void wlan_rnr_set_bss_idx(uint32_t bss_idx)
+{
+	g_rnr_info.rnr_mbss_idx_map |= (1 << (bss_idx-1));
+}
+
+uint32_t wlan_rnr_get_bss_idx(void)
+{
+	return g_rnr_info.rnr_mbss_idx_map;
+}
+
+void  wlan_rnr_clear_bss_idx(void)
+{
+	g_rnr_info.rnr_mbss_idx_map = 0;
+}