1*5113495bSYour Name /*
2*5113495bSYour Name * Copyright (c) 2017 The Linux Foundation. All rights reserved.
3*5113495bSYour Name *
4*5113495bSYour Name * Permission to use, copy, modify, and/or distribute this software for
5*5113495bSYour Name * any purpose with or without fee is hereby granted, provided that the
6*5113495bSYour Name * above copyright notice and this permission notice appear in all
7*5113495bSYour Name * copies.
8*5113495bSYour Name *
9*5113495bSYour Name * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
10*5113495bSYour Name * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
11*5113495bSYour Name * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
12*5113495bSYour Name * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
13*5113495bSYour Name * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
14*5113495bSYour Name * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
15*5113495bSYour Name * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
16*5113495bSYour Name * PERFORMANCE OF THIS SOFTWARE.
17*5113495bSYour Name */
18*5113495bSYour Name
19*5113495bSYour Name /**
20*5113495bSYour Name * DOC: qdf_cpuhp
21*5113495bSYour Name * This file provides OS dependent QDF CPU hotplug APIs
22*5113495bSYour Name */
23*5113495bSYour Name
24*5113495bSYour Name #include "i_qdf_cpuhp.h"
25*5113495bSYour Name #include "qdf_trace.h"
26*5113495bSYour Name #include "linux/cpu.h"
27*5113495bSYour Name #include "linux/notifier.h"
28*5113495bSYour Name #include "linux/version.h"
29*5113495bSYour Name
30*5113495bSYour Name #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 6, 0)
31*5113495bSYour Name #include "linux/cpuhotplug.h"
32*5113495bSYour Name #endif
33*5113495bSYour Name
34*5113495bSYour Name static __qdf_cpuhp_emit __qdf_cpuhp_on_up;
35*5113495bSYour Name static __qdf_cpuhp_emit __qdf_cpuhp_on_down;
36*5113495bSYour Name
37*5113495bSYour Name #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
qdf_cpuhp_legacy_handler(struct notifier_block * block,unsigned long state,void * hcpu)38*5113495bSYour Name static int qdf_cpuhp_legacy_handler(struct notifier_block *block,
39*5113495bSYour Name unsigned long state,
40*5113495bSYour Name void *hcpu)
41*5113495bSYour Name {
42*5113495bSYour Name unsigned long cpu = (unsigned long)hcpu;
43*5113495bSYour Name
44*5113495bSYour Name switch (state) {
45*5113495bSYour Name case CPU_ONLINE:
46*5113495bSYour Name __qdf_cpuhp_on_up(cpu);
47*5113495bSYour Name break;
48*5113495bSYour Name
49*5113495bSYour Name case CPU_DOWN_PREPARE:
50*5113495bSYour Name case CPU_DOWN_PREPARE_FROZEN:
51*5113495bSYour Name __qdf_cpuhp_on_down(cpu);
52*5113495bSYour Name break;
53*5113495bSYour Name
54*5113495bSYour Name default:
55*5113495bSYour Name break;
56*5113495bSYour Name }
57*5113495bSYour Name
58*5113495bSYour Name return NOTIFY_OK;
59*5113495bSYour Name }
60*5113495bSYour Name
61*5113495bSYour Name static struct notifier_block qdf_cpuhp_notifier_block = {
62*5113495bSYour Name .notifier_call = qdf_cpuhp_legacy_handler,
63*5113495bSYour Name };
64*5113495bSYour Name
qdf_cpuhp_register_callbacks(void)65*5113495bSYour Name static inline void qdf_cpuhp_register_callbacks(void)
66*5113495bSYour Name {
67*5113495bSYour Name register_hotcpu_notifier(&qdf_cpuhp_notifier_block);
68*5113495bSYour Name }
69*5113495bSYour Name
qdf_cpuhp_unregister_callbacks(void)70*5113495bSYour Name static inline void qdf_cpuhp_unregister_callbacks(void)
71*5113495bSYour Name {
72*5113495bSYour Name unregister_hotcpu_notifier(&qdf_cpuhp_notifier_block);
73*5113495bSYour Name }
74*5113495bSYour Name #else
75*5113495bSYour Name static enum cpuhp_state registered_hotplug_state;
76*5113495bSYour Name
qdf_cpuhp_up_handler(unsigned int cpu)77*5113495bSYour Name static int qdf_cpuhp_up_handler(unsigned int cpu)
78*5113495bSYour Name {
79*5113495bSYour Name __qdf_cpuhp_on_up(cpu);
80*5113495bSYour Name
81*5113495bSYour Name return 0;
82*5113495bSYour Name }
83*5113495bSYour Name
qdf_cpuhp_down_handler(unsigned int cpu)84*5113495bSYour Name static int qdf_cpuhp_down_handler(unsigned int cpu)
85*5113495bSYour Name {
86*5113495bSYour Name __qdf_cpuhp_on_down(cpu);
87*5113495bSYour Name
88*5113495bSYour Name return 0;
89*5113495bSYour Name }
90*5113495bSYour Name
qdf_cpuhp_register_callbacks(void)91*5113495bSYour Name static inline void qdf_cpuhp_register_callbacks(void)
92*5113495bSYour Name {
93*5113495bSYour Name registered_hotplug_state = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
94*5113495bSYour Name "wlan/qca-qdf:online",
95*5113495bSYour Name qdf_cpuhp_up_handler,
96*5113495bSYour Name qdf_cpuhp_down_handler);
97*5113495bSYour Name }
98*5113495bSYour Name
qdf_cpuhp_unregister_callbacks(void)99*5113495bSYour Name static inline void qdf_cpuhp_unregister_callbacks(void)
100*5113495bSYour Name {
101*5113495bSYour Name QDF_BUG(registered_hotplug_state);
102*5113495bSYour Name if (registered_hotplug_state)
103*5113495bSYour Name cpuhp_remove_state(registered_hotplug_state);
104*5113495bSYour Name }
105*5113495bSYour Name #endif /* KERNEL_VERSION(4, 6, 0) */
106*5113495bSYour Name
__qdf_cpuhp_os_init(__qdf_cpuhp_emit on_up,__qdf_cpuhp_emit on_down)107*5113495bSYour Name void __qdf_cpuhp_os_init(__qdf_cpuhp_emit on_up, __qdf_cpuhp_emit on_down)
108*5113495bSYour Name {
109*5113495bSYour Name __qdf_cpuhp_on_up = on_up;
110*5113495bSYour Name __qdf_cpuhp_on_down = on_down;
111*5113495bSYour Name
112*5113495bSYour Name qdf_cpuhp_register_callbacks();
113*5113495bSYour Name }
114*5113495bSYour Name
__qdf_cpuhp_os_deinit(void)115*5113495bSYour Name void __qdf_cpuhp_os_deinit(void)
116*5113495bSYour Name {
117*5113495bSYour Name qdf_cpuhp_unregister_callbacks();
118*5113495bSYour Name }
119*5113495bSYour Name
120