qcacmn: Add support for target interface for components

Add support for target interface for components.

Change-Id: Id9d642a3369aa881a56a54ff99af135c3feb6584
CRs-Fixed: 2002100

target_if/core/inc/target_if.h

@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+
+/**
+ * DOC: This target interface shall be used
+ *      to communicate with target using WMI.
+ */
+#ifndef _WLAN_TARGET_IF_H_
+#define _WLAN_TARGET_IF_H_
+
+#include "qdf_types.h"
+#include "qdf_util.h"
+#include "wlan_objmgr_psoc_obj.h"
+
+/* ASCII "TGT\0" */
+#define TGT_MAGIC 0x54575400
+
+#define target_if_log(level, args...) \
+		QDF_TRACE(QDF_MODULE_ID_TARGET_IF, level, ## args)
+#define target_if_logfl(level, format, args...) \
+		target_if_log(level, FL(format), ## args)
+
+#define target_if_fatal(format, args...) \
+		target_if_logfl(QDF_TRACE_LEVEL_FATAL, format, ## args)
+#define target_if_err(format, args...) \
+		target_if_logfl(QDF_TRACE_LEVEL_ERROR, format, ## args)
+#define target_if_warn(format, args...) \
+		target_if_logfl(QDF_TRACE_LEVEL_WARN, format, ## args)
+#define target_if_info(format, args...) \
+		target_if_logfl(QDF_TRACE_LEVEL_INFO, format, ## args)
+#define target_if_debug(format, args...) \
+		target_if_logfl(QDF_TRACE_LEVEL_DEBUG, format, ## args)
+
+#define TARGET_IF_ENTER() target_if_logfl(QDF_TRACE_LEVEL_INFO, "enter")
+#define TARGET_IF_EXIT() target_if_logfl(QDF_TRACE_LEVEL_INFO, "exit")
+
+#define GET_WMI_HDL_FROM_PSOC(psoc) (psoc->tgt_if_handle)
+
+typedef struct wlan_objmgr_psoc *(*get_psoc_handle_callback)(
+			void *scn_handle);
+
+/**
+ * struct target_if_ctx - target_interface context
+ * @magic: magic for target if ctx
+ * @get_wmi_handle:  function pointer to get wmi handle
+ * @lock: spin lock for protecting the ctx
+ */
+struct target_if_ctx {
+	uint32_t magic;
+	get_psoc_handle_callback get_psoc_hdl_cb;
+	qdf_spinlock_t lock;
+};
+
+/**
+ * target_if_open() - target_if open
+ * @get_wmi_handle: function pointer to get wmi handle
+ *
+ *
+ * Return: QDF_STATUS
+ */
+QDF_STATUS target_if_open(get_psoc_handle_callback psoc_hdl_cb);
+
+/**
+ * target_if_close() - Close target_if
+ * @scn_handle: scn handle
+ *
+ * Return: QDF_STATUS_SUCCESS - in case of success
+ */
+QDF_STATUS target_if_close(void);
+
+/**
+ * wlan_get_tgt_if_ctx() -Get target if ctx
+ *
+ * Return: target if ctx
+ */
+struct target_if_ctx *target_if_get_ctx(void);
+
+/**
+ * target_if_get_psoc_from_scn_hdl() - get psoc from scn handle
+ * @scn_handle: scn handle
+ *
+ * This API is generally used while processing wmi event.
+ * In wmi event SCN handle will be passed by wmi hence
+ * using this API we can get psoc from scn handle.
+ *
+ * Return: index for matching scn handle
+ */
+struct wlan_objmgr_psoc *target_if_get_psoc_from_scn_hdl(void *scn_handle);
+
+/** target_if_register_tx_ops() - register tx_ops
+ * @tx_ops: tx_ops structure
+ *
+ * This function is to be used by components to populate
+ * the OL function pointers (tx_ops) required by the component
+ * for UMAC-LMAC interaction, with the appropriate handler
+ *
+ * Return: QDF STATUS
+ */
+QDF_STATUS target_if_register_tx_ops(struct wlan_lmac_if_tx_ops *tx_ops);
+
+#endif
+

target_if/core/src/target_if_main.c

@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+
+/**
+ * DOC: API for interacting with target interface.
+ *
+ */
+
+#include "target_if.h"
+
+static struct target_if_ctx *g_target_if_ctx;
+
+struct target_if_ctx *target_if_get_ctx()
+{
+	return g_target_if_ctx;
+}
+
+struct wlan_objmgr_psoc *target_if_get_psoc_from_scn_hdl(void *scn_handle)
+{
+	struct wlan_objmgr_psoc *psoc;
+
+	qdf_spin_lock_bh(&g_target_if_ctx->lock);
+	if (scn_handle && g_target_if_ctx->get_psoc_hdl_cb)
+		psoc = g_target_if_ctx->get_psoc_hdl_cb(scn_handle);
+	else
+		psoc = NULL;
+	qdf_spin_unlock_bh(&g_target_if_ctx->lock);
+
+	return psoc;
+}
+EXPORT_SYMBOL(target_if_get_psoc_from_scn_hdl);
+
+QDF_STATUS target_if_open(get_psoc_handle_callback psoc_hdl_cb)
+{
+	g_target_if_ctx = qdf_mem_malloc(sizeof(*g_target_if_ctx));
+	if (!g_target_if_ctx) {
+		target_if_err("Cannot allocate target if ctx");
+		QDF_ASSERT(0);
+		return QDF_STATUS_E_NOMEM;
+	}
+
+	qdf_spinlock_create(&g_target_if_ctx->lock);
+
+	qdf_spin_lock_bh(&g_target_if_ctx->lock);
+	g_target_if_ctx->magic = TGT_MAGIC;
+	g_target_if_ctx->get_psoc_hdl_cb = psoc_hdl_cb;
+	qdf_spin_unlock_bh(&g_target_if_ctx->lock);
+
+	return QDF_STATUS_SUCCESS;
+}
+EXPORT_SYMBOL(target_if_open);
+
+QDF_STATUS target_if_close(void)
+{
+	if (!g_target_if_ctx) {
+		QDF_ASSERT(0);
+		target_if_err("target if ctx is null");
+		return QDF_STATUS_E_INVAL;
+	}
+
+	qdf_spin_lock_bh(&g_target_if_ctx->lock);
+	g_target_if_ctx->magic = 0;
+	g_target_if_ctx->get_psoc_hdl_cb = NULL;
+	qdf_spin_unlock_bh(&g_target_if_ctx->lock);
+
+	qdf_spinlock_destroy(&g_target_if_ctx->lock);
+	qdf_mem_free(g_target_if_ctx);
+	g_target_if_ctx = NULL;
+
+	return QDF_STATUS_SUCCESS;
+}
+EXPORT_SYMBOL(target_if_close);
+
+QDF_STATUS target_if_register_tx_ops(struct wlan_lmac_if_tx_ops *tx_ops)
+{
+	return QDF_STATUS_SUCCESS;
+}
+EXPORT_SYMBOL(target_if_register_tx_ops);
+
+