fpga-bridge.c (c900529f3d9161bfde5cca0754f83b4d3c3e0220) fpga-bridge.c (d7c4081c54a1d4068de9440957303a76f9e5c95b)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * FPGA Bridge Framework Driver
4 *
5 * Copyright (C) 2013-2016 Altera Corporation, All Rights Reserved.
6 * Copyright (C) 2017 Intel Corporation
7 */
8#include <linux/fpga/fpga-bridge.h>

--- 41 unchanged lines hidden (view full) ---

50
51 if (bridge->br_ops && bridge->br_ops->enable_set)
52 return bridge->br_ops->enable_set(bridge, 0);
53
54 return 0;
55}
56EXPORT_SYMBOL_GPL(fpga_bridge_disable);
57
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * FPGA Bridge Framework Driver
4 *
5 * Copyright (C) 2013-2016 Altera Corporation, All Rights Reserved.
6 * Copyright (C) 2017 Intel Corporation
7 */
8#include <linux/fpga/fpga-bridge.h>

--- 41 unchanged lines hidden (view full) ---

50
51 if (bridge->br_ops && bridge->br_ops->enable_set)
52 return bridge->br_ops->enable_set(bridge, 0);
53
54 return 0;
55}
56EXPORT_SYMBOL_GPL(fpga_bridge_disable);
57
58static struct fpga_bridge *__fpga_bridge_get(struct device *dev,
58static struct fpga_bridge *__fpga_bridge_get(struct device *bridge_dev,
59 struct fpga_image_info *info)
60{
61 struct fpga_bridge *bridge;
59 struct fpga_image_info *info)
60{
61 struct fpga_bridge *bridge;
62 int ret = -ENODEV;
63
62
64 bridge = to_fpga_bridge(dev);
63 bridge = to_fpga_bridge(bridge_dev);
65
66 bridge->info = info;
67
64
65 bridge->info = info;
66
68 if (!mutex_trylock(&bridge->mutex)) {
69 ret = -EBUSY;
70 goto err_dev;
67 if (!mutex_trylock(&bridge->mutex))
68 return ERR_PTR(-EBUSY);
69
70 if (!try_module_get(bridge->br_ops_owner)) {
71 mutex_unlock(&bridge->mutex);
72 return ERR_PTR(-ENODEV);
71 }
72
73 }
74
73 if (!try_module_get(dev->parent->driver->owner))
74 goto err_ll_mod;
75
76 dev_dbg(&bridge->dev, "get\n");
77
78 return bridge;
75 dev_dbg(&bridge->dev, "get\n");
76
77 return bridge;
79
80err_ll_mod:
81 mutex_unlock(&bridge->mutex);
82err_dev:
83 put_device(dev);
84 return ERR_PTR(ret);
85}
86
87/**
88 * of_fpga_bridge_get - get an exclusive reference to an fpga bridge
89 *
90 * @np: node pointer of an FPGA bridge.
91 * @info: fpga image specific information.
92 *
93 * Return:
94 * * fpga_bridge struct pointer if successful.
95 * * -EBUSY if someone already has a reference to the bridge.
96 * * -ENODEV if @np is not an FPGA Bridge or can't take parent driver refcount.
97 */
98struct fpga_bridge *of_fpga_bridge_get(struct device_node *np,
99 struct fpga_image_info *info)
100{
78}
79
80/**
81 * of_fpga_bridge_get - get an exclusive reference to an fpga bridge
82 *
83 * @np: node pointer of an FPGA bridge.
84 * @info: fpga image specific information.
85 *
86 * Return:
87 * * fpga_bridge struct pointer if successful.
88 * * -EBUSY if someone already has a reference to the bridge.
89 * * -ENODEV if @np is not an FPGA Bridge or can't take parent driver refcount.
90 */
91struct fpga_bridge *of_fpga_bridge_get(struct device_node *np,
92 struct fpga_image_info *info)
93{
101 struct device *dev;
94 struct fpga_bridge *bridge;
95 struct device *bridge_dev;
102
96
103 dev = class_find_device_by_of_node(&fpga_bridge_class, np);
104 if (!dev)
97 bridge_dev = class_find_device_by_of_node(&fpga_bridge_class, np);
98 if (!bridge_dev)
105 return ERR_PTR(-ENODEV);
106
99 return ERR_PTR(-ENODEV);
100
107 return __fpga_bridge_get(dev, info);
101 bridge = __fpga_bridge_get(bridge_dev, info);
102 if (IS_ERR(bridge))
103 put_device(bridge_dev);
104
105 return bridge;
108}
109EXPORT_SYMBOL_GPL(of_fpga_bridge_get);
110
111static int fpga_bridge_dev_match(struct device *dev, const void *data)
112{
113 return dev->parent == data;
114}
115

--- 4 unchanged lines hidden (view full) ---

120 *
121 * Given a device, get an exclusive reference to an fpga bridge.
122 *
123 * Return: fpga bridge struct or IS_ERR() condition containing error code.
124 */
125struct fpga_bridge *fpga_bridge_get(struct device *dev,
126 struct fpga_image_info *info)
127{
106}
107EXPORT_SYMBOL_GPL(of_fpga_bridge_get);
108
109static int fpga_bridge_dev_match(struct device *dev, const void *data)
110{
111 return dev->parent == data;
112}
113

--- 4 unchanged lines hidden (view full) ---

118 *
119 * Given a device, get an exclusive reference to an fpga bridge.
120 *
121 * Return: fpga bridge struct or IS_ERR() condition containing error code.
122 */
123struct fpga_bridge *fpga_bridge_get(struct device *dev,
124 struct fpga_image_info *info)
125{
126 struct fpga_bridge *bridge;
128 struct device *bridge_dev;
129
130 bridge_dev = class_find_device(&fpga_bridge_class, NULL, dev,
131 fpga_bridge_dev_match);
132 if (!bridge_dev)
133 return ERR_PTR(-ENODEV);
134
127 struct device *bridge_dev;
128
129 bridge_dev = class_find_device(&fpga_bridge_class, NULL, dev,
130 fpga_bridge_dev_match);
131 if (!bridge_dev)
132 return ERR_PTR(-ENODEV);
133
135 return __fpga_bridge_get(bridge_dev, info);
134 bridge = __fpga_bridge_get(bridge_dev, info);
135 if (IS_ERR(bridge))
136 put_device(bridge_dev);
137
138 return bridge;
136}
137EXPORT_SYMBOL_GPL(fpga_bridge_get);
138
139/**
140 * fpga_bridge_put - release a reference to a bridge
141 *
142 * @bridge: FPGA bridge
143 */
144void fpga_bridge_put(struct fpga_bridge *bridge)
145{
146 dev_dbg(&bridge->dev, "put\n");
147
148 bridge->info = NULL;
139}
140EXPORT_SYMBOL_GPL(fpga_bridge_get);
141
142/**
143 * fpga_bridge_put - release a reference to a bridge
144 *
145 * @bridge: FPGA bridge
146 */
147void fpga_bridge_put(struct fpga_bridge *bridge)
148{
149 dev_dbg(&bridge->dev, "put\n");
150
151 bridge->info = NULL;
149 module_put(bridge->dev.parent->driver->owner);
152 module_put(bridge->br_ops_owner);
150 mutex_unlock(&bridge->mutex);
151 put_device(&bridge->dev);
152}
153EXPORT_SYMBOL_GPL(fpga_bridge_put);
154
155/**
156 * fpga_bridges_enable - enable bridges in a list
157 * @bridge_list: list of FPGA bridges

--- 153 unchanged lines hidden (view full) ---

311static struct attribute *fpga_bridge_attrs[] = {
312 &dev_attr_name.attr,
313 &dev_attr_state.attr,
314 NULL,
315};
316ATTRIBUTE_GROUPS(fpga_bridge);
317
318/**
153 mutex_unlock(&bridge->mutex);
154 put_device(&bridge->dev);
155}
156EXPORT_SYMBOL_GPL(fpga_bridge_put);
157
158/**
159 * fpga_bridges_enable - enable bridges in a list
160 * @bridge_list: list of FPGA bridges

--- 153 unchanged lines hidden (view full) ---

314static struct attribute *fpga_bridge_attrs[] = {
315 &dev_attr_name.attr,
316 &dev_attr_state.attr,
317 NULL,
318};
319ATTRIBUTE_GROUPS(fpga_bridge);
320
321/**
319 * fpga_bridge_register - create and register an FPGA Bridge device
322 * __fpga_bridge_register - create and register an FPGA Bridge device
320 * @parent: FPGA bridge device from pdev
321 * @name: FPGA bridge name
322 * @br_ops: pointer to structure of fpga bridge ops
323 * @priv: FPGA bridge private data
323 * @parent: FPGA bridge device from pdev
324 * @name: FPGA bridge name
325 * @br_ops: pointer to structure of fpga bridge ops
326 * @priv: FPGA bridge private data
327 * @owner: owner module containing the br_ops
324 *
325 * Return: struct fpga_bridge pointer or ERR_PTR()
326 */
327struct fpga_bridge *
328 *
329 * Return: struct fpga_bridge pointer or ERR_PTR()
330 */
331struct fpga_bridge *
328fpga_bridge_register(struct device *parent, const char *name,
329 const struct fpga_bridge_ops *br_ops,
330 void *priv)
332__fpga_bridge_register(struct device *parent, const char *name,
333 const struct fpga_bridge_ops *br_ops,
334 void *priv, struct module *owner)
331{
332 struct fpga_bridge *bridge;
333 int id, ret;
334
335 if (!br_ops) {
336 dev_err(parent, "Attempt to register without fpga_bridge_ops\n");
337 return ERR_PTR(-EINVAL);
338 }

--- 13 unchanged lines hidden (view full) ---

352 goto error_kfree;
353 }
354
355 mutex_init(&bridge->mutex);
356 INIT_LIST_HEAD(&bridge->node);
357
358 bridge->name = name;
359 bridge->br_ops = br_ops;
335{
336 struct fpga_bridge *bridge;
337 int id, ret;
338
339 if (!br_ops) {
340 dev_err(parent, "Attempt to register without fpga_bridge_ops\n");
341 return ERR_PTR(-EINVAL);
342 }

--- 13 unchanged lines hidden (view full) ---

356 goto error_kfree;
357 }
358
359 mutex_init(&bridge->mutex);
360 INIT_LIST_HEAD(&bridge->node);
361
362 bridge->name = name;
363 bridge->br_ops = br_ops;
364 bridge->br_ops_owner = owner;
360 bridge->priv = priv;
361
362 bridge->dev.groups = br_ops->groups;
363 bridge->dev.class = &fpga_bridge_class;
364 bridge->dev.parent = parent;
365 bridge->dev.of_node = parent->of_node;
366 bridge->dev.id = id;
367

--- 13 unchanged lines hidden (view full) ---

381
382error_device:
383 ida_free(&fpga_bridge_ida, id);
384error_kfree:
385 kfree(bridge);
386
387 return ERR_PTR(ret);
388}
365 bridge->priv = priv;
366
367 bridge->dev.groups = br_ops->groups;
368 bridge->dev.class = &fpga_bridge_class;
369 bridge->dev.parent = parent;
370 bridge->dev.of_node = parent->of_node;
371 bridge->dev.id = id;
372

--- 13 unchanged lines hidden (view full) ---

386
387error_device:
388 ida_free(&fpga_bridge_ida, id);
389error_kfree:
390 kfree(bridge);
391
392 return ERR_PTR(ret);
393}
389EXPORT_SYMBOL_GPL(fpga_bridge_register);
394EXPORT_SYMBOL_GPL(__fpga_bridge_register);
390
391/**
392 * fpga_bridge_unregister - unregister an FPGA bridge
393 *
394 * @bridge: FPGA bridge struct
395 *
396 * This function is intended for use in an FPGA bridge driver's remove function.
397 */

--- 44 unchanged lines hidden --- 		395
396/**
397 * fpga_bridge_unregister - unregister an FPGA bridge
398 *
399 * @bridge: FPGA bridge struct
400 *
401 * This function is intended for use in an FPGA bridge driver's remove function.
402 */

--- 44 unchanged lines hidden ---