2 * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
4 * This software is available to you under a choice of one of two
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6 * General Public License (GPL) Version 2, available from the file
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21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/mlx5/driver.h>
34 #include "mlx5_core.h"
36 static LIST_HEAD(intf_list);
37 static LIST_HEAD(mlx5_dev_list);
38 /* intf dev list mutex */
39 static DEFINE_MUTEX(mlx5_intf_mutex);
41 struct mlx5_device_context {
42 struct list_head list;
43 struct mlx5_interface *intf;
50 MLX5_INTERFACE_ATTACHED,
54 void mlx5_add_device(struct mlx5_interface *intf, struct mlx5_priv *priv)
56 struct mlx5_device_context *dev_ctx;
57 struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
59 if (!mlx5_lag_intf_add(intf, priv))
62 dev_ctx = kzalloc(sizeof(*dev_ctx), GFP_KERNEL);
68 dev_ctx->context = intf->add(dev);
69 if (dev_ctx->context) {
70 set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
72 set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
74 spin_lock_irq(&priv->ctx_lock);
75 list_add_tail(&dev_ctx->list, &priv->ctx_list);
76 spin_unlock_irq(&priv->ctx_lock);
79 if (!dev_ctx->context)
83 static struct mlx5_device_context *mlx5_get_device(struct mlx5_interface *intf,
84 struct mlx5_priv *priv)
86 struct mlx5_device_context *dev_ctx;
88 list_for_each_entry(dev_ctx, &priv->ctx_list, list)
89 if (dev_ctx->intf == intf)
94 void mlx5_remove_device(struct mlx5_interface *intf, struct mlx5_priv *priv)
96 struct mlx5_device_context *dev_ctx;
97 struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
99 dev_ctx = mlx5_get_device(intf, priv);
103 spin_lock_irq(&priv->ctx_lock);
104 list_del(&dev_ctx->list);
105 spin_unlock_irq(&priv->ctx_lock);
107 if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
108 intf->remove(dev, dev_ctx->context);
113 static void mlx5_attach_interface(struct mlx5_interface *intf, struct mlx5_priv *priv)
115 struct mlx5_device_context *dev_ctx;
116 struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
118 dev_ctx = mlx5_get_device(intf, priv);
123 if (test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
125 if (intf->attach(dev, dev_ctx->context))
127 set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
129 if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
131 dev_ctx->context = intf->add(dev);
132 if (!dev_ctx->context)
134 set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
138 void mlx5_attach_device(struct mlx5_core_dev *dev)
140 struct mlx5_priv *priv = &dev->priv;
141 struct mlx5_interface *intf;
143 mutex_lock(&mlx5_intf_mutex);
144 list_for_each_entry(intf, &intf_list, list)
145 mlx5_attach_interface(intf, priv);
146 mutex_unlock(&mlx5_intf_mutex);
149 static void mlx5_detach_interface(struct mlx5_interface *intf, struct mlx5_priv *priv)
151 struct mlx5_device_context *dev_ctx;
152 struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
154 dev_ctx = mlx5_get_device(intf, priv);
159 if (!test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
161 intf->detach(dev, dev_ctx->context);
162 clear_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
164 if (!test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
166 intf->remove(dev, dev_ctx->context);
167 clear_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
171 void mlx5_detach_device(struct mlx5_core_dev *dev)
173 struct mlx5_priv *priv = &dev->priv;
174 struct mlx5_interface *intf;
176 mutex_lock(&mlx5_intf_mutex);
177 list_for_each_entry(intf, &intf_list, list)
178 mlx5_detach_interface(intf, priv);
179 mutex_unlock(&mlx5_intf_mutex);
182 bool mlx5_device_registered(struct mlx5_core_dev *dev)
184 struct mlx5_priv *priv;
187 mutex_lock(&mlx5_intf_mutex);
188 list_for_each_entry(priv, &mlx5_dev_list, dev_list)
189 if (priv == &dev->priv)
191 mutex_unlock(&mlx5_intf_mutex);
196 void mlx5_register_device(struct mlx5_core_dev *dev)
198 struct mlx5_priv *priv = &dev->priv;
199 struct mlx5_interface *intf;
201 mutex_lock(&mlx5_intf_mutex);
202 list_add_tail(&priv->dev_list, &mlx5_dev_list);
203 list_for_each_entry(intf, &intf_list, list)
204 mlx5_add_device(intf, priv);
205 mutex_unlock(&mlx5_intf_mutex);
208 void mlx5_unregister_device(struct mlx5_core_dev *dev)
210 struct mlx5_priv *priv = &dev->priv;
211 struct mlx5_interface *intf;
213 mutex_lock(&mlx5_intf_mutex);
214 list_for_each_entry_reverse(intf, &intf_list, list)
215 mlx5_remove_device(intf, priv);
216 list_del(&priv->dev_list);
217 mutex_unlock(&mlx5_intf_mutex);
220 int mlx5_register_interface(struct mlx5_interface *intf)
222 struct mlx5_priv *priv;
224 if (!intf->add || !intf->remove)
227 mutex_lock(&mlx5_intf_mutex);
228 list_add_tail(&intf->list, &intf_list);
229 list_for_each_entry(priv, &mlx5_dev_list, dev_list)
230 mlx5_add_device(intf, priv);
231 mutex_unlock(&mlx5_intf_mutex);
235 EXPORT_SYMBOL(mlx5_register_interface);
237 void mlx5_unregister_interface(struct mlx5_interface *intf)
239 struct mlx5_priv *priv;
241 mutex_lock(&mlx5_intf_mutex);
242 list_for_each_entry(priv, &mlx5_dev_list, dev_list)
243 mlx5_remove_device(intf, priv);
244 list_del(&intf->list);
245 mutex_unlock(&mlx5_intf_mutex);
247 EXPORT_SYMBOL(mlx5_unregister_interface);
249 /* Must be called with intf_mutex held */
250 static bool mlx5_has_added_dev_by_protocol(struct mlx5_core_dev *mdev, int protocol)
252 struct mlx5_device_context *dev_ctx;
253 struct mlx5_interface *intf;
256 list_for_each_entry(intf, &intf_list, list) {
257 if (intf->protocol == protocol) {
258 dev_ctx = mlx5_get_device(intf, &mdev->priv);
259 if (dev_ctx && test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
268 void mlx5_reload_interface(struct mlx5_core_dev *mdev, int protocol)
270 mutex_lock(&mlx5_intf_mutex);
271 if (mlx5_has_added_dev_by_protocol(mdev, protocol)) {
272 mlx5_remove_dev_by_protocol(mdev, protocol);
273 mlx5_add_dev_by_protocol(mdev, protocol);
275 mutex_unlock(&mlx5_intf_mutex);
278 /* Must be called with intf_mutex held */
279 void mlx5_add_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
281 struct mlx5_interface *intf;
283 list_for_each_entry(intf, &intf_list, list)
284 if (intf->protocol == protocol) {
285 mlx5_add_device(intf, &dev->priv);
290 /* Must be called with intf_mutex held */
291 void mlx5_remove_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
293 struct mlx5_interface *intf;
295 list_for_each_entry(intf, &intf_list, list)
296 if (intf->protocol == protocol) {
297 mlx5_remove_device(intf, &dev->priv);
302 static u32 mlx5_gen_pci_id(struct mlx5_core_dev *dev)
304 return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
305 (dev->pdev->bus->number << 8) |
306 PCI_SLOT(dev->pdev->devfn));
309 /* Must be called with intf_mutex held */
310 struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
312 struct mlx5_core_dev *res = NULL;
313 struct mlx5_core_dev *tmp_dev;
314 struct mlx5_priv *priv;
317 if (!mlx5_core_is_pf(dev))
320 pci_id = mlx5_gen_pci_id(dev);
321 list_for_each_entry(priv, &mlx5_dev_list, dev_list) {
322 tmp_dev = container_of(priv, struct mlx5_core_dev, priv);
323 if (!mlx5_core_is_pf(tmp_dev))
326 if ((dev != tmp_dev) && (mlx5_gen_pci_id(tmp_dev) == pci_id)) {
336 void mlx5_dev_list_lock(void)
338 mutex_lock(&mlx5_intf_mutex);
341 void mlx5_dev_list_unlock(void)
343 mutex_unlock(&mlx5_intf_mutex);
346 int mlx5_dev_list_trylock(void)
348 return mutex_trylock(&mlx5_intf_mutex);