1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
From 02e92b21edb4df7285f27ea5f0403377dcabe22d Mon Sep 17 00:00:00 2001
From: Ioana Ciornei <ioana.ciornei@nxp.com>
Date: Tue, 29 Oct 2019 22:48:55 +0200
Subject: [PATCH] bus: fsl-mc: add autorescan sysfs
Add the autorescan sysfs in order to enable/disable the DPRC IRQs on
which automatic rescan of the bus is performed. This is important when
dynamic creation of objects is needed to happen in a timely manner because
object creation can be bundled together.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
---
drivers/bus/fsl-mc/dprc-driver.c | 17 ++++++++++--
drivers/bus/fsl-mc/fsl-mc-bus.c | 55 +++++++++++++++++++++++++++++++++++++
drivers/bus/fsl-mc/fsl-mc-private.h | 4 +++
include/linux/fsl/mc.h | 1 +
4 files changed, 75 insertions(+), 2 deletions(-)
--- a/drivers/bus/fsl-mc/dprc-driver.c
+++ b/drivers/bus/fsl-mc/dprc-driver.c
@@ -484,8 +484,9 @@ out:
/*
* Disable and clear interrupt for a given DPRC object
*/
-static int disable_dprc_irq(struct fsl_mc_device *mc_dev)
+int disable_dprc_irq(struct fsl_mc_device *mc_dev)
{
+ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
int error;
struct fsl_mc_io *mc_io = mc_dev->mc_io;
@@ -522,9 +523,18 @@ static int disable_dprc_irq(struct fsl_m
return error;
}
+ mc_bus->irq_enabled = 0;
+
return 0;
}
+int get_dprc_irq_state(struct fsl_mc_device *mc_dev)
+{
+ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
+
+ return mc_bus->irq_enabled;
+}
+
static int register_dprc_irq_handler(struct fsl_mc_device *mc_dev)
{
int error;
@@ -551,8 +561,9 @@ static int register_dprc_irq_handler(str
return 0;
}
-static int enable_dprc_irq(struct fsl_mc_device *mc_dev)
+int enable_dprc_irq(struct fsl_mc_device *mc_dev)
{
+ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
int error;
/*
@@ -580,6 +591,8 @@ static int enable_dprc_irq(struct fsl_mc
return error;
}
+ mc_bus->irq_enabled = 1;
+
return 0;
}
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -237,8 +237,63 @@ static ssize_t rescan_store(struct bus_t
}
static BUS_ATTR_WO(rescan);
+static int fsl_mc_bus_set_autorescan(struct device *dev, void *data)
+{
+ struct fsl_mc_device *root_mc_dev;
+ unsigned long val;
+ char *buf = data;
+
+ if (!fsl_mc_is_root_dprc(dev))
+ goto exit;
+
+ root_mc_dev = to_fsl_mc_device(dev);
+
+ if (kstrtoul(buf, 0, &val) < 0)
+ return -EINVAL;
+
+ if (val)
+ enable_dprc_irq(root_mc_dev);
+ else
+ disable_dprc_irq(root_mc_dev);
+
+exit:
+ return 0;
+}
+
+static int fsl_mc_bus_get_autorescan(struct device *dev, void *data)
+{
+ struct fsl_mc_device *root_mc_dev;
+ char *buf = data;
+
+ if (!fsl_mc_is_root_dprc(dev))
+ goto exit;
+
+ root_mc_dev = to_fsl_mc_device(dev);
+
+ sprintf(buf, "%d\n", get_dprc_irq_state(root_mc_dev));
+exit:
+ return 0;
+}
+
+static ssize_t autorescan_store(struct bus_type *bus,
+ const char *buf, size_t count)
+{
+ bus_for_each_dev(bus, NULL, (void *)buf, fsl_mc_bus_set_autorescan);
+
+ return count;
+}
+
+static ssize_t autorescan_show(struct bus_type *bus, char *buf)
+{
+ bus_for_each_dev(bus, NULL, (void *)buf, fsl_mc_bus_get_autorescan);
+ return strlen(buf);
+}
+
+static BUS_ATTR_RW(autorescan);
+
static struct attribute *fsl_mc_bus_attrs[] = {
&bus_attr_rescan.attr,
+ &bus_attr_autorescan.attr,
NULL,
};
--- a/drivers/bus/fsl-mc/fsl-mc-private.h
+++ b/drivers/bus/fsl-mc/fsl-mc-private.h
@@ -203,4 +203,8 @@ static inline void fsl_mc_uapi_remove_de
#endif
+int disable_dprc_irq(struct fsl_mc_device *mc_dev);
+int enable_dprc_irq(struct fsl_mc_device *mc_dev);
+int get_dprc_irq_state(struct fsl_mc_device *mc_dev);
+
#endif /* _FSL_MC_PRIVATE_H_ */
--- a/include/linux/fsl/mc.h
+++ b/include/linux/fsl/mc.h
@@ -1006,6 +1006,7 @@ struct fsl_mc_bus {
struct mutex scan_mutex; /* serializes bus scanning */
struct dprc_attributes dprc_attr;
struct fsl_mc_uapi uapi_misc;
+ int irq_enabled;
};
int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,
|
