xref: /wlan-driver/qcacld-3.0/components/disa/core/src/wlan_disa_main.c (revision 5113495b16420b49004c444715d2daae2066e7dc)
1 /*
2  * Copyright (c) 2018-2020 The Linux Foundation. All rights reserved.
3  *
4  * Permission to use, copy, modify, and/or distribute this software for
5  * any purpose with or without fee is hereby granted, provided that the
6  * above copyright notice and this permission notice appear in all
7  * copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
10  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
11  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
12  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
13  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
14  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
15  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
16  * PERFORMANCE OF THIS SOFTWARE.
17  */
18 /**
19  * DOC: Implement various api / helper function which shall be used for
20  * DISA user and target interface.
21  */
22 
23 #include "wlan_disa_main.h"
24 #include "wlan_disa_obj_mgmt_public_struct.h"
25 #include "wlan_disa_tgt_api.h"
26 
27 static struct wlan_disa_ctx *gp_disa_ctx;
28 
disa_allocate_ctx(void)29 QDF_STATUS disa_allocate_ctx(void)
30 {
31 	/* If it is already created, ignore */
32 	if (gp_disa_ctx) {
33 		disa_debug("already allocated disa_ctx");
34 		return QDF_STATUS_SUCCESS;
35 	}
36 
37 	/* allocate DISA ctx */
38 	gp_disa_ctx = qdf_mem_malloc(sizeof(*gp_disa_ctx));
39 	if (!gp_disa_ctx)
40 		return QDF_STATUS_E_NOMEM;
41 
42 	qdf_spinlock_create(&gp_disa_ctx->lock);
43 
44 	return QDF_STATUS_SUCCESS;
45 }
46 
disa_free_ctx(void)47 void disa_free_ctx(void)
48 {
49 	if (!gp_disa_ctx) {
50 		disa_err("disa ctx is already freed");
51 		QDF_ASSERT(0);
52 		return;
53 	}
54 	qdf_spinlock_destroy(&gp_disa_ctx->lock);
55 	qdf_mem_free(gp_disa_ctx);
56 	gp_disa_ctx = NULL;
57 }
58 
disa_get_context(void)59 struct wlan_disa_ctx *disa_get_context(void)
60 {
61 	return gp_disa_ctx;
62 }
63 
disa_core_encrypt_decrypt_req(struct wlan_objmgr_psoc * psoc,struct disa_encrypt_decrypt_req_params * req,encrypt_decrypt_resp_callback cb,void * cookie)64 QDF_STATUS disa_core_encrypt_decrypt_req(struct wlan_objmgr_psoc *psoc,
65 		struct disa_encrypt_decrypt_req_params *req,
66 		encrypt_decrypt_resp_callback cb,
67 		void *cookie)
68 {
69 	struct wlan_disa_ctx *disa_ctx;
70 	QDF_STATUS status = QDF_STATUS_SUCCESS;
71 
72 	DISA_ENTER();
73 	disa_ctx = disa_get_context();
74 	if (!disa_ctx) {
75 		disa_err("DISA context is NULL!");
76 		return QDF_STATUS_E_INVAL;
77 	}
78 
79 	qdf_spin_lock_bh(&disa_ctx->lock);
80 	if (!disa_ctx->request_active) {
81 		disa_ctx->callback = cb;
82 		disa_ctx->callback_context = cookie;
83 		disa_ctx->request_active = true;
84 	} else {
85 		status = QDF_STATUS_E_INVAL;
86 	}
87 	qdf_spin_unlock_bh(&disa_ctx->lock);
88 
89 	if (status != QDF_STATUS_SUCCESS) {
90 		disa_err("A request is already active!");
91 		return status;
92 	}
93 
94 	status = disa_psoc_get_ref(psoc);
95 	if (status != QDF_STATUS_SUCCESS) {
96 		disa_err("DISA cannot get the reference out of psoc");
97 		return status;
98 	}
99 
100 	status = tgt_disa_encrypt_decrypt_req(psoc, req);
101 	disa_psoc_put_ref(psoc);
102 
103 	DISA_EXIT();
104 	return status;
105 }
106