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 int 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);
210 void mlx5_unregister_device(struct mlx5_core_dev *dev)
212 struct mlx5_priv *priv = &dev->priv;
213 struct mlx5_interface *intf;
215 mutex_lock(&mlx5_intf_mutex);
216 list_for_each_entry(intf, &intf_list, list)
217 mlx5_remove_device(intf, priv);
218 list_del(&priv->dev_list);
219 mutex_unlock(&mlx5_intf_mutex);
222 int mlx5_register_interface(struct mlx5_interface *intf)
224 struct mlx5_priv *priv;
226 if (!intf->add || !intf->remove)
229 mutex_lock(&mlx5_intf_mutex);
230 list_add_tail(&intf->list, &intf_list);
231 list_for_each_entry(priv, &mlx5_dev_list, dev_list)
232 mlx5_add_device(intf, priv);
233 mutex_unlock(&mlx5_intf_mutex);
237 EXPORT_SYMBOL(mlx5_register_interface);
239 void mlx5_unregister_interface(struct mlx5_interface *intf)
241 struct mlx5_priv *priv;
243 mutex_lock(&mlx5_intf_mutex);
244 list_for_each_entry(priv, &mlx5_dev_list, dev_list)
245 mlx5_remove_device(intf, priv);
246 list_del(&intf->list);
247 mutex_unlock(&mlx5_intf_mutex);
249 EXPORT_SYMBOL(mlx5_unregister_interface);
251 void mlx5_reload_interface(struct mlx5_core_dev *mdev, int protocol)
253 mutex_lock(&mlx5_intf_mutex);
254 mlx5_remove_dev_by_protocol(mdev, protocol);
255 mlx5_add_dev_by_protocol(mdev, protocol);
256 mutex_unlock(&mlx5_intf_mutex);
259 /* Must be called with intf_mutex held */
260 void mlx5_add_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
262 struct mlx5_interface *intf;
264 list_for_each_entry(intf, &intf_list, list)
265 if (intf->protocol == protocol) {
266 mlx5_add_device(intf, &dev->priv);
271 /* Must be called with intf_mutex held */
272 void mlx5_remove_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
274 struct mlx5_interface *intf;
276 list_for_each_entry(intf, &intf_list, list)
277 if (intf->protocol == protocol) {
278 mlx5_remove_device(intf, &dev->priv);
283 static u32 mlx5_gen_pci_id(struct mlx5_core_dev *dev)
285 return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
286 (dev->pdev->bus->number << 8) |
287 PCI_SLOT(dev->pdev->devfn));
290 /* Must be called with intf_mutex held */
291 struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
293 u32 pci_id = mlx5_gen_pci_id(dev);
294 struct mlx5_core_dev *res = NULL;
295 struct mlx5_core_dev *tmp_dev;
296 struct mlx5_priv *priv;
298 list_for_each_entry(priv, &mlx5_dev_list, dev_list) {
299 tmp_dev = container_of(priv, struct mlx5_core_dev, priv);
300 if ((dev != tmp_dev) && (mlx5_gen_pci_id(tmp_dev) == pci_id)) {
310 void mlx5_dev_list_lock(void)
312 mutex_lock(&mlx5_intf_mutex);
315 void mlx5_dev_list_unlock(void)
317 mutex_unlock(&mlx5_intf_mutex);
320 int mlx5_dev_list_trylock(void)
322 return mutex_trylock(&mlx5_intf_mutex);