1*5113495bSYour Name /*
2*5113495bSYour Name * Copyright (c) 2018, 2020 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_streamfs
21*5113495bSYour Name * This file provides QDF stream file system APIs
22*5113495bSYour Name */
23*5113495bSYour Name
24*5113495bSYour Name #include <i_qdf_streamfs.h>
25*5113495bSYour Name #include <qdf_trace.h>
26*5113495bSYour Name #include <qdf_streamfs.h>
27*5113495bSYour Name #include <qdf_module.h>
28*5113495bSYour Name
29*5113495bSYour Name /**
30*5113495bSYour Name * qdf_create_buf_file_handler() - Create streamfs buffer file
31*5113495bSYour Name * @filename: base name of files to create, NULL for buffering only
32*5113495bSYour Name * @parent: dentry of parent directory, NULL for root directory
33*5113495bSYour Name * @mode: filemode
34*5113495bSYour Name * @buf: streamfs channel buf
35*5113495bSYour Name * @is_global: pointer to set whether this buf file is global or not.
36*5113495bSYour Name *
37*5113495bSYour Name * Returns dentry if successful, NULL otherwise.
38*5113495bSYour Name */
39*5113495bSYour Name static qdf_dentry_t
qdf_create_buf_file_handler(const char * filename,qdf_dentry_t parent,uint16_t mode,qdf_streamfs_chan_buf_t buf,int32_t * is_global)40*5113495bSYour Name qdf_create_buf_file_handler(const char *filename, qdf_dentry_t parent,
41*5113495bSYour Name uint16_t mode, qdf_streamfs_chan_buf_t buf,
42*5113495bSYour Name int32_t *is_global)
43*5113495bSYour Name {
44*5113495bSYour Name qdf_dentry_t buf_file;
45*5113495bSYour Name *is_global = 1;
46*5113495bSYour Name buf_file = qdf_streamfs_create_file(filename, mode, parent, buf);
47*5113495bSYour Name
48*5113495bSYour Name if (!buf_file)
49*5113495bSYour Name return NULL;
50*5113495bSYour Name
51*5113495bSYour Name return buf_file;
52*5113495bSYour Name }
53*5113495bSYour Name
54*5113495bSYour Name /**
55*5113495bSYour Name * qdf_remove_buf_file_handler() - Remove streamfs buffer file
56*5113495bSYour Name * @dentry:dentry
57*5113495bSYour Name */
qdf_remove_buf_file_handler(qdf_dentry_t dentry)58*5113495bSYour Name static int qdf_remove_buf_file_handler(qdf_dentry_t dentry)
59*5113495bSYour Name {
60*5113495bSYour Name qdf_streamfs_remove_file(dentry);
61*5113495bSYour Name
62*5113495bSYour Name return 0;
63*5113495bSYour Name }
64*5113495bSYour Name
65*5113495bSYour Name static struct rchan_callbacks g_qdf_streamfs_cb = {
66*5113495bSYour Name .create_buf_file = qdf_create_buf_file_handler,
67*5113495bSYour Name .remove_buf_file = qdf_remove_buf_file_handler,
68*5113495bSYour Name };
69*5113495bSYour Name
70*5113495bSYour Name qdf_dentry_t
qdf_streamfs_create_file(const char * name,uint16_t mode,qdf_dentry_t parent,qdf_streamfs_chan_buf_t buf)71*5113495bSYour Name qdf_streamfs_create_file(const char *name, uint16_t mode,
72*5113495bSYour Name qdf_dentry_t parent,
73*5113495bSYour Name qdf_streamfs_chan_buf_t buf)
74*5113495bSYour Name {
75*5113495bSYour Name qdf_dentry_t file = NULL;
76*5113495bSYour Name
77*5113495bSYour Name if (!name)
78*5113495bSYour Name return NULL;
79*5113495bSYour Name
80*5113495bSYour Name file = debugfs_create_file(name, mode,
81*5113495bSYour Name (struct dentry *)parent,
82*5113495bSYour Name buf, &relay_file_operations);
83*5113495bSYour Name
84*5113495bSYour Name return file;
85*5113495bSYour Name }
86*5113495bSYour Name
87*5113495bSYour Name qdf_export_symbol(qdf_streamfs_create_file);
88*5113495bSYour Name
89*5113495bSYour Name qdf_streamfs_chan_t
qdf_streamfs_open(const char * base_filename,qdf_dentry_t parent,size_t subbuf_size,size_t n_subbufs,void * private_data)90*5113495bSYour Name qdf_streamfs_open(const char *base_filename, qdf_dentry_t parent,
91*5113495bSYour Name size_t subbuf_size, size_t n_subbufs,
92*5113495bSYour Name void *private_data)
93*5113495bSYour Name {
94*5113495bSYour Name qdf_streamfs_chan_t channel_ptr = NULL;
95*5113495bSYour Name
96*5113495bSYour Name channel_ptr = relay_open(base_filename,
97*5113495bSYour Name (struct dentry *)parent,
98*5113495bSYour Name subbuf_size, n_subbufs,
99*5113495bSYour Name &g_qdf_streamfs_cb,
100*5113495bSYour Name private_data);
101*5113495bSYour Name
102*5113495bSYour Name return channel_ptr;
103*5113495bSYour Name }
104*5113495bSYour Name
105*5113495bSYour Name qdf_export_symbol(qdf_streamfs_open);
106*5113495bSYour Name
qdf_streamfs_close(qdf_streamfs_chan_t chan)107*5113495bSYour Name void qdf_streamfs_close(qdf_streamfs_chan_t chan)
108*5113495bSYour Name {
109*5113495bSYour Name if (chan)
110*5113495bSYour Name relay_close(chan);
111*5113495bSYour Name }
112*5113495bSYour Name
113*5113495bSYour Name qdf_export_symbol(qdf_streamfs_close);
114*5113495bSYour Name
qdf_streamfs_flush(qdf_streamfs_chan_t chan)115*5113495bSYour Name void qdf_streamfs_flush(qdf_streamfs_chan_t chan)
116*5113495bSYour Name {
117*5113495bSYour Name if (chan)
118*5113495bSYour Name relay_flush(chan);
119*5113495bSYour Name }
120*5113495bSYour Name
121*5113495bSYour Name qdf_export_symbol(qdf_streamfs_flush);
122*5113495bSYour Name
qdf_streamfs_reset(qdf_streamfs_chan_t chan)123*5113495bSYour Name void qdf_streamfs_reset(qdf_streamfs_chan_t chan)
124*5113495bSYour Name {
125*5113495bSYour Name if (chan)
126*5113495bSYour Name relay_reset(chan);
127*5113495bSYour Name }
128*5113495bSYour Name
129*5113495bSYour Name qdf_export_symbol(qdf_streamfs_reset);
130*5113495bSYour Name
qdf_streamfs_subbufs_consumed(qdf_streamfs_chan_t chan,unsigned int cpu,size_t consumed)131*5113495bSYour Name void qdf_streamfs_subbufs_consumed(qdf_streamfs_chan_t chan,
132*5113495bSYour Name unsigned int cpu,
133*5113495bSYour Name size_t consumed)
134*5113495bSYour Name {
135*5113495bSYour Name if (chan)
136*5113495bSYour Name relay_subbufs_consumed(chan, cpu, consumed);
137*5113495bSYour Name }
138*5113495bSYour Name
139*5113495bSYour Name qdf_export_symbol(qdf_streamfs_subbufs_consumed);
140*5113495bSYour Name
qdf_streamfs_write(qdf_streamfs_chan_t chan,const void * data,size_t length)141*5113495bSYour Name void qdf_streamfs_write(qdf_streamfs_chan_t chan,
142*5113495bSYour Name const void *data,
143*5113495bSYour Name size_t length)
144*5113495bSYour Name {
145*5113495bSYour Name if (chan)
146*5113495bSYour Name relay_write(chan, data, length);
147*5113495bSYour Name }
148*5113495bSYour Name
149*5113495bSYour Name qdf_export_symbol(qdf_streamfs_write);
150