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authorMatt Porter <mporter@kernel.crashing.org>2005-11-07 04:00:15 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 10:53:46 -0500
commit394b701ce4fbfde919a9bcbf84cb4820a7c6d47c (patch)
treea397fff4043a9810e753fb81224349bd36db45b8 /drivers
parentd217d5450f11d8c907c0458d175b0dc999b4d06d (diff)
[PATCH] RapidIO support: core base
Adds a RapidIO subsystem to the kernel. RIO is a switched fabric interconnect used in higher-end embedded applications. The curious can look at the specs over at http://www.rapidio.org The core code implements enumeration/discovery, management of devices/resources, and interfaces for RIO drivers. There's a lot more to do to take advantages of all the hardware features. However, this should provide a good base for folks with RIO hardware to start contributing. Signed-off-by: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/Makefile1
-rw-r--r--drivers/rapidio/Kconfig18
-rw-r--r--drivers/rapidio/Makefile6
-rw-r--r--drivers/rapidio/rio-access.c175
-rw-r--r--drivers/rapidio/rio-driver.c229
-rw-r--r--drivers/rapidio/rio-sysfs.c230
-rw-r--r--drivers/rapidio/rio.c503
-rw-r--r--drivers/rapidio/rio.h57
8 files changed, 1219 insertions, 0 deletions
diff --git a/drivers/Makefile b/drivers/Makefile
index 61c64f768366..fac1e1603097 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -7,6 +7,7 @@
7 7
8obj-$(CONFIG_PCI) += pci/ usb/ 8obj-$(CONFIG_PCI) += pci/ usb/
9obj-$(CONFIG_PARISC) += parisc/ 9obj-$(CONFIG_PARISC) += parisc/
10obj-$(CONFIG_RAPIDIO) += rapidio/
10obj-y += video/ 11obj-y += video/
11obj-$(CONFIG_ACPI) += acpi/ 12obj-$(CONFIG_ACPI) += acpi/
12# PnP must come after ACPI since it will eventually need to check if acpi 13# PnP must come after ACPI since it will eventually need to check if acpi
diff --git a/drivers/rapidio/Kconfig b/drivers/rapidio/Kconfig
new file mode 100644
index 000000000000..0b2d2c3579a7
--- /dev/null
+++ b/drivers/rapidio/Kconfig
@@ -0,0 +1,18 @@
1#
2# RapidIO configuration
3#
4config RAPIDIO_8_BIT_TRANSPORT
5 bool "8-bit transport addressing"
6 depends on RAPIDIO
7 ---help---
8 By default, the kernel assumes a 16-bit addressed RapidIO
9 network. By selecting this option, the kernel will support
10 an 8-bit addressed network.
11
12config RAPIDIO_DISC_TIMEOUT
13 int "Discovery timeout duration (seconds)"
14 depends on RAPIDIO
15 default "30"
16 ---help---
17 Amount of time a discovery node waits for a host to complete
18 enumeration beforing giving up.
diff --git a/drivers/rapidio/Makefile b/drivers/rapidio/Makefile
new file mode 100644
index 000000000000..7c0e1818de51
--- /dev/null
+++ b/drivers/rapidio/Makefile
@@ -0,0 +1,6 @@
1#
2# Makefile for RapidIO interconnect services
3#
4obj-y += rio.o rio-access.o rio-driver.o rio-scan.o rio-sysfs.o
5
6obj-$(CONFIG_RAPIDIO) += switches/
diff --git a/drivers/rapidio/rio-access.c b/drivers/rapidio/rio-access.c
new file mode 100644
index 000000000000..b9fab2ae3a36
--- /dev/null
+++ b/drivers/rapidio/rio-access.c
@@ -0,0 +1,175 @@
1/*
2 * RapidIO configuration space access support
3 *
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13#include <linux/rio.h>
14#include <linux/module.h>
15
16/*
17 * These interrupt-safe spinlocks protect all accesses to RIO
18 * configuration space and doorbell access.
19 */
20static spinlock_t rio_config_lock = SPIN_LOCK_UNLOCKED;
21static spinlock_t rio_doorbell_lock = SPIN_LOCK_UNLOCKED;
22
23/*
24 * Wrappers for all RIO configuration access functions. They just check
25 * alignment, do locking and call the low-level functions pointed to
26 * by rio_mport->ops.
27 */
28
29#define RIO_8_BAD 0
30#define RIO_16_BAD (offset & 1)
31#define RIO_32_BAD (offset & 3)
32
33/**
34 * RIO_LOP_READ - Generate rio_local_read_config_* functions
35 * @size: Size of configuration space read (8, 16, 32 bits)
36 * @type: C type of value argument
37 * @len: Length of configuration space read (1, 2, 4 bytes)
38 *
39 * Generates rio_local_read_config_* functions used to access
40 * configuration space registers on the local device.
41 */
42#define RIO_LOP_READ(size,type,len) \
43int __rio_local_read_config_##size \
44 (struct rio_mport *mport, u32 offset, type *value) \
45{ \
46 int res; \
47 unsigned long flags; \
48 u32 data = 0; \
49 if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
50 spin_lock_irqsave(&rio_config_lock, flags); \
51 res = mport->ops->lcread(mport->id, offset, len, &data); \
52 *value = (type)data; \
53 spin_unlock_irqrestore(&rio_config_lock, flags); \
54 return res; \
55}
56
57/**
58 * RIO_LOP_WRITE - Generate rio_local_write_config_* functions
59 * @size: Size of configuration space write (8, 16, 32 bits)
60 * @type: C type of value argument
61 * @len: Length of configuration space write (1, 2, 4 bytes)
62 *
63 * Generates rio_local_write_config_* functions used to access
64 * configuration space registers on the local device.
65 */
66#define RIO_LOP_WRITE(size,type,len) \
67int __rio_local_write_config_##size \
68 (struct rio_mport *mport, u32 offset, type value) \
69{ \
70 int res; \
71 unsigned long flags; \
72 if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
73 spin_lock_irqsave(&rio_config_lock, flags); \
74 res = mport->ops->lcwrite(mport->id, offset, len, value); \
75 spin_unlock_irqrestore(&rio_config_lock, flags); \
76 return res; \
77}
78
79RIO_LOP_READ(8, u8, 1)
80RIO_LOP_READ(16, u16, 2)
81RIO_LOP_READ(32, u32, 4)
82RIO_LOP_WRITE(8, u8, 1)
83RIO_LOP_WRITE(16, u16, 2)
84RIO_LOP_WRITE(32, u32, 4)
85
86EXPORT_SYMBOL_GPL(__rio_local_read_config_8);
87EXPORT_SYMBOL_GPL(__rio_local_read_config_16);
88EXPORT_SYMBOL_GPL(__rio_local_read_config_32);
89EXPORT_SYMBOL_GPL(__rio_local_write_config_8);
90EXPORT_SYMBOL_GPL(__rio_local_write_config_16);
91EXPORT_SYMBOL_GPL(__rio_local_write_config_32);
92
93/**
94 * RIO_OP_READ - Generate rio_mport_read_config_* functions
95 * @size: Size of configuration space read (8, 16, 32 bits)
96 * @type: C type of value argument
97 * @len: Length of configuration space read (1, 2, 4 bytes)
98 *
99 * Generates rio_mport_read_config_* functions used to access
100 * configuration space registers on the local device.
101 */
102#define RIO_OP_READ(size,type,len) \
103int rio_mport_read_config_##size \
104 (struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type *value) \
105{ \
106 int res; \
107 unsigned long flags; \
108 u32 data = 0; \
109 if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
110 spin_lock_irqsave(&rio_config_lock, flags); \
111 res = mport->ops->cread(mport->id, destid, hopcount, offset, len, &data); \
112 *value = (type)data; \
113 spin_unlock_irqrestore(&rio_config_lock, flags); \
114 return res; \
115}
116
117/**
118 * RIO_OP_WRITE - Generate rio_mport_write_config_* functions
119 * @size: Size of configuration space write (8, 16, 32 bits)
120 * @type: C type of value argument
121 * @len: Length of configuration space write (1, 2, 4 bytes)
122 *
123 * Generates rio_mport_write_config_* functions used to access
124 * configuration space registers on the local device.
125 */
126#define RIO_OP_WRITE(size,type,len) \
127int rio_mport_write_config_##size \
128 (struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type value) \
129{ \
130 int res; \
131 unsigned long flags; \
132 if (RIO_##size##_BAD) return RIO_BAD_SIZE; \
133 spin_lock_irqsave(&rio_config_lock, flags); \
134 res = mport->ops->cwrite(mport->id, destid, hopcount, offset, len, value); \
135 spin_unlock_irqrestore(&rio_config_lock, flags); \
136 return res; \
137}
138
139RIO_OP_READ(8, u8, 1)
140RIO_OP_READ(16, u16, 2)
141RIO_OP_READ(32, u32, 4)
142RIO_OP_WRITE(8, u8, 1)
143RIO_OP_WRITE(16, u16, 2)
144RIO_OP_WRITE(32, u32, 4)
145
146EXPORT_SYMBOL_GPL(rio_mport_read_config_8);
147EXPORT_SYMBOL_GPL(rio_mport_read_config_16);
148EXPORT_SYMBOL_GPL(rio_mport_read_config_32);
149EXPORT_SYMBOL_GPL(rio_mport_write_config_8);
150EXPORT_SYMBOL_GPL(rio_mport_write_config_16);
151EXPORT_SYMBOL_GPL(rio_mport_write_config_32);
152
153/**
154 * rio_mport_send_doorbell - Send a doorbell message
155 *
156 * @mport: RIO master port
157 * @destid: RIO device destination ID
158 * @data: Doorbell message data
159 *
160 * Send a doorbell message to a RIO device. The doorbell message
161 * has a 16-bit info field provided by the data argument.
162 */
163int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid, u16 data)
164{
165 int res;
166 unsigned long flags;
167
168 spin_lock_irqsave(&rio_doorbell_lock, flags);
169 res = mport->ops->dsend(mport->id, destid, data);
170 spin_unlock_irqrestore(&rio_doorbell_lock, flags);
171
172 return res;
173}
174
175EXPORT_SYMBOL_GPL(rio_mport_send_doorbell);
diff --git a/drivers/rapidio/rio-driver.c b/drivers/rapidio/rio-driver.c
new file mode 100644
index 000000000000..dc749609699a
--- /dev/null
+++ b/drivers/rapidio/rio-driver.c
@@ -0,0 +1,229 @@
1/*
2 * RapidIO driver support
3 *
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/rio.h>
16#include <linux/rio_ids.h>
17
18#include "rio.h"
19
20/**
21 * rio_match_device - Tell if a RIO device has a matching RIO device id structure
22 * @id: the RIO device id structure to match against
23 * @rdev: the RIO device structure to match against
24 *
25 * Used from driver probe and bus matching to check whether a RIO device
26 * matches a device id structure provided by a RIO driver. Returns the
27 * matching &struct rio_device_id or %NULL if there is no match.
28 */
29static const struct rio_device_id *rio_match_device(const struct rio_device_id
30 *id,
31 const struct rio_dev *rdev)
32{
33 while (id->vid || id->asm_vid) {
34 if (((id->vid == RIO_ANY_ID) || (id->vid == rdev->vid)) &&
35 ((id->did == RIO_ANY_ID) || (id->did == rdev->did)) &&
36 ((id->asm_vid == RIO_ANY_ID)
37 || (id->asm_vid == rdev->asm_vid))
38 && ((id->asm_did == RIO_ANY_ID)
39 || (id->asm_did == rdev->asm_did)))
40 return id;
41 id++;
42 }
43 return NULL;
44}
45
46/**
47 * rio_dev_get - Increments the reference count of the RIO device structure
48 *
49 * @rdev: RIO device being referenced
50 *
51 * Each live reference to a device should be refcounted.
52 *
53 * Drivers for RIO devices should normally record such references in
54 * their probe() methods, when they bind to a device, and release
55 * them by calling rio_dev_put(), in their disconnect() methods.
56 */
57struct rio_dev *rio_dev_get(struct rio_dev *rdev)
58{
59 if (rdev)
60 get_device(&rdev->dev);
61
62 return rdev;
63}
64
65/**
66 * rio_dev_put - Release a use of the RIO device structure
67 *
68 * @rdev: RIO device being disconnected
69 *
70 * Must be called when a user of a device is finished with it.
71 * When the last user of the device calls this function, the
72 * memory of the device is freed.
73 */
74void rio_dev_put(struct rio_dev *rdev)
75{
76 if (rdev)
77 put_device(&rdev->dev);
78}
79
80/**
81 * rio_device_probe - Tell if a RIO device structure has a matching RIO
82 * device id structure
83 * @id: the RIO device id structure to match against
84 * @dev: the RIO device structure to match against
85 *
86 * return 0 and set rio_dev->driver when drv claims rio_dev, else error
87 */
88static int rio_device_probe(struct device *dev)
89{
90 struct rio_driver *rdrv = to_rio_driver(dev->driver);
91 struct rio_dev *rdev = to_rio_dev(dev);
92 int error = -ENODEV;
93 const struct rio_device_id *id;
94
95 if (!rdev->driver && rdrv->probe) {
96 if (!rdrv->id_table)
97 return error;
98 id = rio_match_device(rdrv->id_table, rdev);
99 rio_dev_get(rdev);
100 if (id)
101 error = rdrv->probe(rdev, id);
102 if (error >= 0) {
103 rdev->driver = rdrv;
104 error = 0;
105 rio_dev_put(rdev);
106 }
107 }
108 return error;
109}
110
111/**
112 * rio_device_remove - Remove a RIO device from the system
113 *
114 * @dev: the RIO device structure to match against
115 *
116 * Remove a RIO device from the system. If it has an associated
117 * driver, then run the driver remove() method. Then update
118 * the reference count.
119 */
120static int rio_device_remove(struct device *dev)
121{
122 struct rio_dev *rdev = to_rio_dev(dev);
123 struct rio_driver *rdrv = rdev->driver;
124
125 if (rdrv) {
126 if (rdrv->remove)
127 rdrv->remove(rdev);
128 rdev->driver = NULL;
129 }
130
131 rio_dev_put(rdev);
132
133 return 0;
134}
135
136/**
137 * rio_register_driver - register a new RIO driver
138 * @rdrv: the RIO driver structure to register
139 *
140 * Adds a &struct rio_driver to the list of registered drivers
141 * Returns a negative value on error, otherwise 0. If no error
142 * occurred, the driver remains registered even if no device
143 * was claimed during registration.
144 */
145int rio_register_driver(struct rio_driver *rdrv)
146{
147 /* initialize common driver fields */
148 rdrv->driver.name = rdrv->name;
149 rdrv->driver.bus = &rio_bus_type;
150 rdrv->driver.probe = rio_device_probe;
151 rdrv->driver.remove = rio_device_remove;
152
153 /* register with core */
154 return driver_register(&rdrv->driver);
155}
156
157/**
158 * rio_unregister_driver - unregister a RIO driver
159 * @rdrv: the RIO driver structure to unregister
160 *
161 * Deletes the &struct rio_driver from the list of registered RIO
162 * drivers, gives it a chance to clean up by calling its remove()
163 * function for each device it was responsible for, and marks those
164 * devices as driverless.
165 */
166void rio_unregister_driver(struct rio_driver *rdrv)
167{
168 driver_unregister(&rdrv->driver);
169}
170
171/**
172 * rio_match_bus - Tell if a RIO device structure has a matching RIO
173 * driver device id structure
174 * @dev: the standard device structure to match against
175 * @drv: the standard driver structure containing the ids to match against
176 *
177 * Used by a driver to check whether a RIO device present in the
178 * system is in its list of supported devices. Returns 1 if
179 * there is a matching &struct rio_device_id or 0 if there is
180 * no match.
181 */
182static int rio_match_bus(struct device *dev, struct device_driver *drv)
183{
184 struct rio_dev *rdev = to_rio_dev(dev);
185 struct rio_driver *rdrv = to_rio_driver(drv);
186 const struct rio_device_id *id = rdrv->id_table;
187 const struct rio_device_id *found_id;
188
189 if (!id)
190 goto out;
191
192 found_id = rio_match_device(id, rdev);
193
194 if (found_id)
195 return 1;
196
197 out:return 0;
198}
199
200static struct device rio_bus = {
201 .bus_id = "rapidio",
202};
203
204struct bus_type rio_bus_type = {
205 .name = "rapidio",
206 .match = rio_match_bus,
207 .dev_attrs = rio_dev_attrs
208};
209
210/**
211 * rio_bus_init - Register the RapidIO bus with the device model
212 *
213 * Registers the RIO bus device and RIO bus type with the Linux
214 * device model.
215 */
216static int __init rio_bus_init(void)
217{
218 if (device_register(&rio_bus) < 0)
219 printk("RIO: failed to register RIO bus device\n");
220 return bus_register(&rio_bus_type);
221}
222
223postcore_initcall(rio_bus_init);
224
225EXPORT_SYMBOL_GPL(rio_register_driver);
226EXPORT_SYMBOL_GPL(rio_unregister_driver);
227EXPORT_SYMBOL_GPL(rio_bus_type);
228EXPORT_SYMBOL_GPL(rio_dev_get);
229EXPORT_SYMBOL_GPL(rio_dev_put);
diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c
new file mode 100644
index 000000000000..73218a37506d
--- /dev/null
+++ b/drivers/rapidio/rio-sysfs.c
@@ -0,0 +1,230 @@
1/*
2 * RapidIO sysfs attributes and support
3 *
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13#include <linux/config.h>
14#include <linux/kernel.h>
15#include <linux/rio.h>
16#include <linux/rio_drv.h>
17#include <linux/stat.h>
18
19#include "rio.h"
20
21/* Sysfs support */
22#define rio_config_attr(field, format_string) \
23static ssize_t \
24 field##_show(struct device *dev, char *buf) \
25{ \
26 struct rio_dev *rdev = to_rio_dev(dev); \
27 \
28 return sprintf(buf, format_string, rdev->field); \
29} \
30
31rio_config_attr(did, "0x%04x\n");
32rio_config_attr(vid, "0x%04x\n");
33rio_config_attr(device_rev, "0x%08x\n");
34rio_config_attr(asm_did, "0x%04x\n");
35rio_config_attr(asm_vid, "0x%04x\n");
36rio_config_attr(asm_rev, "0x%04x\n");
37
38static ssize_t routes_show(struct device *dev, char *buf)
39{
40 struct rio_dev *rdev = to_rio_dev(dev);
41 char *str = buf;
42 int i;
43
44 if (!rdev->rswitch)
45 goto out;
46
47 for (i = 0; i < RIO_MAX_ROUTE_ENTRIES; i++) {
48 if (rdev->rswitch->route_table[i] == RIO_INVALID_ROUTE)
49 continue;
50 str +=
51 sprintf(str, "%04x %02x\n", i,
52 rdev->rswitch->route_table[i]);
53 }
54
55 out:
56 return (str - buf);
57}
58
59struct device_attribute rio_dev_attrs[] = {
60 __ATTR_RO(did),
61 __ATTR_RO(vid),
62 __ATTR_RO(device_rev),
63 __ATTR_RO(asm_did),
64 __ATTR_RO(asm_vid),
65 __ATTR_RO(asm_rev),
66 __ATTR_RO(routes),
67 __ATTR_NULL,
68};
69
70static ssize_t
71rio_read_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
72{
73 struct rio_dev *dev =
74 to_rio_dev(container_of(kobj, struct device, kobj));
75 unsigned int size = 0x100;
76 loff_t init_off = off;
77 u8 *data = (u8 *) buf;
78
79 /* Several chips lock up trying to read undefined config space */
80 if (capable(CAP_SYS_ADMIN))
81 size = 0x200000;
82
83 if (off > size)
84 return 0;
85 if (off + count > size) {
86 size -= off;
87 count = size;
88 } else {
89 size = count;
90 }
91
92 if ((off & 1) && size) {
93 u8 val;
94 rio_read_config_8(dev, off, &val);
95 data[off - init_off] = val;
96 off++;
97 size--;
98 }
99
100 if ((off & 3) && size > 2) {
101 u16 val;
102 rio_read_config_16(dev, off, &val);
103 data[off - init_off] = (val >> 8) & 0xff;
104 data[off - init_off + 1] = val & 0xff;
105 off += 2;
106 size -= 2;
107 }
108
109 while (size > 3) {
110 u32 val;
111 rio_read_config_32(dev, off, &val);
112 data[off - init_off] = (val >> 24) & 0xff;
113 data[off - init_off + 1] = (val >> 16) & 0xff;
114 data[off - init_off + 2] = (val >> 8) & 0xff;
115 data[off - init_off + 3] = val & 0xff;
116 off += 4;
117 size -= 4;
118 }
119
120 if (size >= 2) {
121 u16 val;
122 rio_read_config_16(dev, off, &val);
123 data[off - init_off] = (val >> 8) & 0xff;
124 data[off - init_off + 1] = val & 0xff;
125 off += 2;
126 size -= 2;
127 }
128
129 if (size > 0) {
130 u8 val;
131 rio_read_config_8(dev, off, &val);
132 data[off - init_off] = val;
133 off++;
134 --size;
135 }
136
137 return count;
138}
139
140static ssize_t
141rio_write_config(struct kobject *kobj, char *buf, loff_t off, size_t count)
142{
143 struct rio_dev *dev =
144 to_rio_dev(container_of(kobj, struct device, kobj));
145 unsigned int size = count;
146 loff_t init_off = off;
147 u8 *data = (u8 *) buf;
148
149 if (off > 0x200000)
150 return 0;
151 if (off + count > 0x200000) {
152 size = 0x200000 - off;
153 count = size;
154 }
155
156 if ((off & 1) && size) {
157 rio_write_config_8(dev, off, data[off - init_off]);
158 off++;
159 size--;
160 }
161
162 if ((off & 3) && (size > 2)) {
163 u16 val = data[off - init_off + 1];
164 val |= (u16) data[off - init_off] << 8;
165 rio_write_config_16(dev, off, val);
166 off += 2;
167 size -= 2;
168 }
169
170 while (size > 3) {
171 u32 val = data[off - init_off + 3];
172 val |= (u32) data[off - init_off + 2] << 8;
173 val |= (u32) data[off - init_off + 1] << 16;
174 val |= (u32) data[off - init_off] << 24;
175 rio_write_config_32(dev, off, val);
176 off += 4;
177 size -= 4;
178 }
179
180 if (size >= 2) {
181 u16 val = data[off - init_off + 1];
182 val |= (u16) data[off - init_off] << 8;
183 rio_write_config_16(dev, off, val);
184 off += 2;
185 size -= 2;
186 }
187
188 if (size) {
189 rio_write_config_8(dev, off, data[off - init_off]);
190 off++;
191 --size;
192 }
193
194 return count;
195}
196
197static struct bin_attribute rio_config_attr = {
198 .attr = {
199 .name = "config",
200 .mode = S_IRUGO | S_IWUSR,
201 .owner = THIS_MODULE,
202 },
203 .size = 0x200000,
204 .read = rio_read_config,
205 .write = rio_write_config,
206};
207
208/**
209 * rio_create_sysfs_dev_files - create RIO specific sysfs files
210 * @rdev: device whose entries should be created
211 *
212 * Create files when @rdev is added to sysfs.
213 */
214int rio_create_sysfs_dev_files(struct rio_dev *rdev)
215{
216 sysfs_create_bin_file(&rdev->dev.kobj, &rio_config_attr);
217
218 return 0;
219}
220
221/**
222 * rio_remove_sysfs_dev_files - cleanup RIO specific sysfs files
223 * @rdev: device whose entries we should free
224 *
225 * Cleanup when @rdev is removed from sysfs.
226 */
227void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
228{
229 sysfs_remove_bin_file(&rdev->dev.kobj, &rio_config_attr);
230}
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
new file mode 100644
index 000000000000..adc299e2b07e
--- /dev/null
+++ b/drivers/rapidio/rio.c
@@ -0,0 +1,503 @@
1/*
2 * RapidIO interconnect services
3 * (RapidIO Interconnect Specification, http://www.rapidio.org)
4 *
5 * Copyright 2005 MontaVista Software, Inc.
6 * Matt Porter <mporter@kernel.crashing.org>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/config.h>
15#include <linux/types.h>
16#include <linux/kernel.h>
17
18#include <linux/delay.h>
19#include <linux/init.h>
20#include <linux/rio.h>
21#include <linux/rio_drv.h>
22#include <linux/rio_ids.h>
23#include <linux/rio_regs.h>
24#include <linux/module.h>
25#include <linux/spinlock.h>
26
27#include "rio.h"
28
29static LIST_HEAD(rio_mports);
30
31/**
32 * rio_local_get_device_id - Get the base/extended device id for a port
33 * @port: RIO master port from which to get the deviceid
34 *
35 * Reads the base/extended device id from the local device
36 * implementing the master port. Returns the 8/16-bit device
37 * id.
38 */
39u16 rio_local_get_device_id(struct rio_mport *port)
40{
41 u32 result;
42
43 rio_local_read_config_32(port, RIO_DID_CSR, &result);
44
45 return (RIO_GET_DID(result));
46}
47
48/**
49 * rio_request_inb_mbox - request inbound mailbox service
50 * @mport: RIO master port from which to allocate the mailbox resource
51 * @mbox: Mailbox number to claim
52 * @entries: Number of entries in inbound mailbox queue
53 * @minb: Callback to execute when inbound message is received
54 *
55 * Requests ownership of an inbound mailbox resource and binds
56 * a callback function to the resource. Returns %0 on success.
57 */
58int rio_request_inb_mbox(struct rio_mport *mport,
59 int mbox,
60 int entries,
61 void (*minb) (struct rio_mport * mport, int mbox,
62 int slot))
63{
64 int rc = 0;
65
66 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
67
68 if (res) {
69 rio_init_mbox_res(res, mbox, mbox);
70
71 /* Make sure this mailbox isn't in use */
72 if ((rc =
73 request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
74 res)) < 0) {
75 kfree(res);
76 goto out;
77 }
78
79 mport->inb_msg[mbox].res = res;
80
81 /* Hook the inbound message callback */
82 mport->inb_msg[mbox].mcback = minb;
83
84 rc = rio_open_inb_mbox(mport, mbox, entries);
85 } else
86 rc = -ENOMEM;
87
88 out:
89 return rc;
90}
91
92/**
93 * rio_release_inb_mbox - release inbound mailbox message service
94 * @mport: RIO master port from which to release the mailbox resource
95 * @mbox: Mailbox number to release
96 *
97 * Releases ownership of an inbound mailbox resource. Returns 0
98 * if the request has been satisfied.
99 */
100int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
101{
102 rio_close_inb_mbox(mport, mbox);
103
104 /* Release the mailbox resource */
105 return release_resource(mport->inb_msg[mbox].res);
106}
107
108/**
109 * rio_request_outb_mbox - request outbound mailbox service
110 * @mport: RIO master port from which to allocate the mailbox resource
111 * @mbox: Mailbox number to claim
112 * @entries: Number of entries in outbound mailbox queue
113 * @moutb: Callback to execute when outbound message is sent
114 *
115 * Requests ownership of an outbound mailbox resource and binds
116 * a callback function to the resource. Returns 0 on success.
117 */
118int rio_request_outb_mbox(struct rio_mport *mport,
119 int mbox,
120 int entries,
121 void (*moutb) (struct rio_mport * mport, int mbox,
122 int slot))
123{
124 int rc = 0;
125
126 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
127
128 if (res) {
129 rio_init_mbox_res(res, mbox, mbox);
130
131 /* Make sure this outbound mailbox isn't in use */
132 if ((rc =
133 request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
134 res)) < 0) {
135 kfree(res);
136 goto out;
137 }
138
139 mport->outb_msg[mbox].res = res;
140
141 /* Hook the inbound message callback */
142 mport->outb_msg[mbox].mcback = moutb;
143
144 rc = rio_open_outb_mbox(mport, mbox, entries);
145 } else
146 rc = -ENOMEM;
147
148 out:
149 return rc;
150}
151
152/**
153 * rio_release_outb_mbox - release outbound mailbox message service
154 * @mport: RIO master port from which to release the mailbox resource
155 * @mbox: Mailbox number to release
156 *
157 * Releases ownership of an inbound mailbox resource. Returns 0
158 * if the request has been satisfied.
159 */
160int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
161{
162 rio_close_outb_mbox(mport, mbox);
163
164 /* Release the mailbox resource */
165 return release_resource(mport->outb_msg[mbox].res);
166}
167
168/**
169 * rio_setup_inb_dbell - bind inbound doorbell callback
170 * @mport: RIO master port to bind the doorbell callback
171 * @res: Doorbell message resource
172 * @dinb: Callback to execute when doorbell is received
173 *
174 * Adds a doorbell resource/callback pair into a port's
175 * doorbell event list. Returns 0 if the request has been
176 * satisfied.
177 */
178static int
179rio_setup_inb_dbell(struct rio_mport *mport, struct resource *res,
180 void (*dinb) (struct rio_mport * mport, u16 src, u16 dst,
181 u16 info))
182{
183 int rc = 0;
184 struct rio_dbell *dbell;
185
186 if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
187 rc = -ENOMEM;
188 goto out;
189 }
190
191 dbell->res = res;
192 dbell->dinb = dinb;
193
194 list_add_tail(&dbell->node, &mport->dbells);
195
196 out:
197 return rc;
198}
199
200/**
201 * rio_request_inb_dbell - request inbound doorbell message service
202 * @mport: RIO master port from which to allocate the doorbell resource
203 * @start: Doorbell info range start
204 * @end: Doorbell info range end
205 * @dinb: Callback to execute when doorbell is received
206 *
207 * Requests ownership of an inbound doorbell resource and binds
208 * a callback function to the resource. Returns 0 if the request
209 * has been satisfied.
210 */
211int rio_request_inb_dbell(struct rio_mport *mport,
212 u16 start,
213 u16 end,
214 void (*dinb) (struct rio_mport * mport, u16 src,
215 u16 dst, u16 info))
216{
217 int rc = 0;
218
219 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
220
221 if (res) {
222 rio_init_dbell_res(res, start, end);
223
224 /* Make sure these doorbells aren't in use */
225 if ((rc =
226 request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
227 res)) < 0) {
228 kfree(res);
229 goto out;
230 }
231
232 /* Hook the doorbell callback */
233 rc = rio_setup_inb_dbell(mport, res, dinb);
234 } else
235 rc = -ENOMEM;
236
237 out:
238 return rc;
239}
240
241/**
242 * rio_release_inb_dbell - release inbound doorbell message service
243 * @mport: RIO master port from which to release the doorbell resource
244 * @start: Doorbell info range start
245 * @end: Doorbell info range end
246 *
247 * Releases ownership of an inbound doorbell resource and removes
248 * callback from the doorbell event list. Returns 0 if the request
249 * has been satisfied.
250 */
251int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
252{
253 int rc = 0, found = 0;
254 struct rio_dbell *dbell;
255
256 list_for_each_entry(dbell, &mport->dbells, node) {
257 if ((dbell->res->start == start) && (dbell->res->end == end)) {
258 found = 1;
259 break;
260 }
261 }
262
263 /* If we can't find an exact match, fail */
264 if (!found) {
265 rc = -EINVAL;
266 goto out;
267 }
268
269 /* Delete from list */
270 list_del(&dbell->node);
271
272 /* Release the doorbell resource */
273 rc = release_resource(dbell->res);
274
275 /* Free the doorbell event */
276 kfree(dbell);
277
278 out:
279 return rc;
280}
281
282/**
283 * rio_request_outb_dbell - request outbound doorbell message range
284 * @rdev: RIO device from which to allocate the doorbell resource
285 * @start: Doorbell message range start
286 * @end: Doorbell message range end
287 *
288 * Requests ownership of a doorbell message range. Returns a resource
289 * if the request has been satisfied or %NULL on failure.
290 */
291struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
292 u16 end)
293{
294 struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
295
296 if (res) {
297 rio_init_dbell_res(res, start, end);
298
299 /* Make sure these doorbells aren't in use */
300 if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)
301 < 0) {
302 kfree(res);
303 res = NULL;
304 }
305 }
306
307 return res;
308}
309
310/**
311 * rio_release_outb_dbell - release outbound doorbell message range
312 * @rdev: RIO device from which to release the doorbell resource
313 * @res: Doorbell resource to be freed
314 *
315 * Releases ownership of a doorbell message range. Returns 0 if the
316 * request has been satisfied.
317 */
318int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
319{
320 int rc = release_resource(res);
321
322 kfree(res);
323
324 return rc;
325}
326
327/**
328 * rio_mport_get_feature - query for devices' extended features
329 * @port: Master port to issue transaction
330 * @local: Indicate a local master port or remote device access
331 * @destid: Destination ID of the device
332 * @hopcount: Number of switch hops to the device
333 * @ftr: Extended feature code
334 *
335 * Tell if a device supports a given RapidIO capability.
336 * Returns the offset of the requested extended feature
337 * block within the device's RIO configuration space or
338 * 0 in case the device does not support it. Possible
339 * values for @ftr:
340 *
341 * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices
342 *
343 * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices
344 *
345 * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices
346 *
347 * %RIO_EFB_SER_EP_ID LP/Serial EP Devices
348 *
349 * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices
350 *
351 * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices
352 */
353u32
354rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
355 u8 hopcount, int ftr)
356{
357 u32 asm_info, ext_ftr_ptr, ftr_header;
358
359 if (local)
360 rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info);
361 else
362 rio_mport_read_config_32(port, destid, hopcount,
363 RIO_ASM_INFO_CAR, &asm_info);
364
365 ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK;
366
367 while (ext_ftr_ptr) {
368 if (local)
369 rio_local_read_config_32(port, ext_ftr_ptr,
370 &ftr_header);
371 else
372 rio_mport_read_config_32(port, destid, hopcount,
373 ext_ftr_ptr, &ftr_header);
374 if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
375 return ext_ftr_ptr;
376 if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
377 break;
378 }
379
380 return 0;
381}
382
383/**
384 * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
385 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
386 * @did: RIO did to match or %RIO_ANY_ID to match all dids
387 * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
388 * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
389 * @from: Previous RIO device found in search, or %NULL for new search
390 *
391 * Iterates through the list of known RIO devices. If a RIO device is
392 * found with a matching @vid, @did, @asm_vid, @asm_did, the reference
393 * count to the device is incrememted and a pointer to its device
394 * structure is returned. Otherwise, %NULL is returned. A new search
395 * is initiated by passing %NULL to the @from argument. Otherwise, if
396 * @from is not %NULL, searches continue from next device on the global
397 * list. The reference count for @from is always decremented if it is
398 * not %NULL.
399 */
400struct rio_dev *rio_get_asm(u16 vid, u16 did,
401 u16 asm_vid, u16 asm_did, struct rio_dev *from)
402{
403 struct list_head *n;
404 struct rio_dev *rdev;
405
406 WARN_ON(in_interrupt());
407 spin_lock(&rio_global_list_lock);
408 n = from ? from->global_list.next : rio_devices.next;
409
410 while (n && (n != &rio_devices)) {
411 rdev = rio_dev_g(n);
412 if ((vid == RIO_ANY_ID || rdev->vid == vid) &&
413 (did == RIO_ANY_ID || rdev->did == did) &&
414 (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) &&
415 (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did))
416 goto exit;
417 n = n->next;
418 }
419 rdev = NULL;
420 exit:
421 rio_dev_put(from);
422 rdev = rio_dev_get(rdev);
423 spin_unlock(&rio_global_list_lock);
424 return rdev;
425}
426
427/**
428 * rio_get_device - Begin or continue searching for a RIO device by vid/did
429 * @vid: RIO vid to match or %RIO_ANY_ID to match all vids
430 * @did: RIO did to match or %RIO_ANY_ID to match all dids
431 * @from: Previous RIO device found in search, or %NULL for new search
432 *
433 * Iterates through the list of known RIO devices. If a RIO device is
434 * found with a matching @vid and @did, the reference count to the
435 * device is incrememted and a pointer to its device structure is returned.
436 * Otherwise, %NULL is returned. A new search is initiated by passing %NULL
437 * to the @from argument. Otherwise, if @from is not %NULL, searches
438 * continue from next device on the global list. The reference count for
439 * @from is always decremented if it is not %NULL.
440 */
441struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
442{
443 return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
444}
445
446static void rio_fixup_device(struct rio_dev *dev)
447{
448}
449
450static int __devinit rio_init(void)
451{
452 struct rio_dev *dev = NULL;
453
454 while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) {
455 rio_fixup_device(dev);
456 }
457 return 0;
458}
459
460device_initcall(rio_init);
461
462int rio_init_mports(void)
463{
464 int rc = 0;
465 struct rio_mport *port;
466
467 list_for_each_entry(port, &rio_mports, node) {
468 if (!request_mem_region(port->iores.start,
469 port->iores.end - port->iores.start,
470 port->name)) {
471 printk(KERN_ERR
472 "RIO: Error requesting master port region %8.8lx-%8.8lx\n",
473 port->iores.start, port->iores.end - 1);
474 rc = -ENOMEM;
475 goto out;
476 }
477
478 if (port->host_deviceid >= 0)
479 rio_enum_mport(port);
480 else
481 rio_disc_mport(port);
482 }
483
484 out:
485 return rc;
486}
487
488void rio_register_mport(struct rio_mport *port)
489{
490 list_add_tail(&port->node, &rio_mports);
491}
492
493EXPORT_SYMBOL_GPL(rio_local_get_device_id);
494EXPORT_SYMBOL_GPL(rio_get_device);
495EXPORT_SYMBOL_GPL(rio_get_asm);
496EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
497EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
498EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
499EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
500EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
501EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
502EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
503EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
diff --git a/drivers/rapidio/rio.h b/drivers/rapidio/rio.h
new file mode 100644
index 000000000000..f865a68cd3d5
--- /dev/null
+++ b/drivers/rapidio/rio.h
@@ -0,0 +1,57 @@
1/*
2 * RapidIO interconnect services
3 *
4 * Copyright 2005 MontaVista Software, Inc.
5 * Matt Porter <mporter@kernel.crashing.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13#include <linux/device.h>
14#include <linux/list.h>
15#include <linux/rio.h>
16
17/* Functions internal to the RIO core code */
18
19extern u32 rio_mport_get_feature(struct rio_mport *mport, int local, u16 destid,
20 u8 hopcount, int ftr);
21extern int rio_create_sysfs_dev_files(struct rio_dev *rdev);
22extern int rio_enum_mport(struct rio_mport *mport);
23extern int rio_disc_mport(struct rio_mport *mport);
24
25/* Structures internal to the RIO core code */
26extern struct device_attribute rio_dev_attrs[];
27extern spinlock_t rio_global_list_lock;
28
29/* Helpers internal to the RIO core code */
30#define DECLARE_RIO_ROUTE_SECTION(section, vid, did, add_hook, get_hook) \
31 static struct rio_route_ops __rio_route_ops __attribute_used__ \
32 __attribute__((__section__(#section))) = { vid, did, add_hook, get_hook };
33
34/**
35 * DECLARE_RIO_ROUTE_OPS - Registers switch routing operations
36 * @vid: RIO vendor ID
37 * @did: RIO device ID
38 * @add_hook: Callback that adds a route entry
39 * @get_hook: Callback that gets a route entry
40 *
41 * Manipulating switch route tables in RIO is switch specific. This
42 * registers a switch by vendor and device ID with two callbacks for
43 * modifying and retrieving route entries in a switch. A &struct
44 * rio_route_ops is initialized with the ops and placed into a
45 * RIO-specific kernel section.
46 */
47#define DECLARE_RIO_ROUTE_OPS(vid, did, add_hook, get_hook) \
48 DECLARE_RIO_ROUTE_SECTION(.rio_route_ops, \
49 vid, did, add_hook, get_hook)
50
51#ifdef CONFIG_RAPIDIO_8_BIT_TRANSPORT
52#define RIO_GET_DID(x) ((x & 0x00ff0000) >> 16)
53#define RIO_SET_DID(x) ((x & 0x000000ff) << 16)
54#else
55#define RIO_GET_DID(x) (x & 0xffff)
56#define RIO_SET_DID(x) (x & 0xffff)
57#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-21 16:09:26 -0500