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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-op-mode.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-op-mode.h | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-op-mode.h b/drivers/net/wireless/iwlwifi/iwl-op-mode.h new file mode 100644 index 000000000..ce1cdd760 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-op-mode.h @@ -0,0 +1,274 @@ +/****************************************************************************** + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved. + * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, + * USA + * + * The full GNU General Public License is included in this distribution + * in the file called COPYING. + * + * Contact Information: + * Intel Linux Wireless <ilw@linux.intel.com> + * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + * + * BSD LICENSE + * + * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. + * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + *****************************************************************************/ +#ifndef __iwl_op_mode_h__ +#define __iwl_op_mode_h__ + +#include <linux/netdevice.h> +#include <linux/debugfs.h> + +struct iwl_op_mode; +struct iwl_trans; +struct sk_buff; +struct iwl_device_cmd; +struct iwl_rx_cmd_buffer; +struct iwl_fw; +struct iwl_cfg; + +/** + * DOC: Operational mode - what is it ? + * + * The operational mode (a.k.a. op_mode) is the layer that implements + * mac80211's handlers. It knows two APIs: mac80211's and the fw's. It uses + * the transport API to access the HW. The op_mode doesn't need to know how the + * underlying HW works, since the transport layer takes care of that. + * + * There can be several op_mode: i.e. different fw APIs will require two + * different op_modes. This is why the op_mode is virtualized. + */ + +/** + * DOC: Life cycle of the Operational mode + * + * The operational mode has a very simple life cycle. + * + * 1) The driver layer (iwl-drv.c) chooses the op_mode based on the + * capabilities advertised by the fw file (in TLV format). + * 2) The driver layer starts the op_mode (ops->start) + * 3) The op_mode registers mac80211 + * 4) The op_mode is governed by mac80211 + * 5) The driver layer stops the op_mode + */ + +/** + * struct iwl_op_mode_ops - op_mode specific operations + * + * The op_mode exports its ops so that external components can start it and + * interact with it. The driver layer typically calls the start and stop + * handlers, the transport layer calls the others. + * + * All the handlers MUST be implemented + * + * @start: start the op_mode. The transport layer is already allocated. + * May sleep + * @stop: stop the op_mode. Must free all the memory allocated. + * May sleep + * @rx: Rx notification to the op_mode. rxb is the Rx buffer itself. Cmd is the + * HCMD this Rx responds to. Can't sleep. + * @napi_add: NAPI initialization. The transport is fully responsible for NAPI, + * but the higher layers need to know about it (in particular mac80211 to + * to able to call the right NAPI RX functions); this function is needed + * to eventually call netif_napi_add() with higher layer involvement. + * @queue_full: notifies that a HW queue is full. + * Must be atomic and called with BH disabled. + * @queue_not_full: notifies that a HW queue is not full any more. + * Must be atomic and called with BH disabled. + * @hw_rf_kill:notifies of a change in the HW rf kill switch. True means that + * the radio is killed. Return %true if the device should be stopped by + * the transport immediately after the call. May sleep. + * @free_skb: allows the transport layer to free skbs that haven't been + * reclaimed by the op_mode. This can happen when the driver is freed and + * there are Tx packets pending in the transport layer. + * Must be atomic + * @nic_error: error notification. Must be atomic and must be called with BH + * disabled. + * @cmd_queue_full: Called when the command queue gets full. Must be atomic and + * called with BH disabled. + * @nic_config: configure NIC, called before firmware is started. + * May sleep + * @wimax_active: invoked when WiMax becomes active. May sleep + * @enter_d0i3: configure the fw to enter d0i3. return 1 to indicate d0i3 + * entrance is aborted (e.g. due to held reference). May sleep. + * @exit_d0i3: configure the fw to exit d0i3. May sleep. + */ +struct iwl_op_mode_ops { + struct iwl_op_mode *(*start)(struct iwl_trans *trans, + const struct iwl_cfg *cfg, + const struct iwl_fw *fw, + struct dentry *dbgfs_dir); + void (*stop)(struct iwl_op_mode *op_mode); + int (*rx)(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb, + struct iwl_device_cmd *cmd); + void (*napi_add)(struct iwl_op_mode *op_mode, + struct napi_struct *napi, + struct net_device *napi_dev, + int (*poll)(struct napi_struct *, int), + int weight); + void (*queue_full)(struct iwl_op_mode *op_mode, int queue); + void (*queue_not_full)(struct iwl_op_mode *op_mode, int queue); + bool (*hw_rf_kill)(struct iwl_op_mode *op_mode, bool state); + void (*free_skb)(struct iwl_op_mode *op_mode, struct sk_buff *skb); + void (*nic_error)(struct iwl_op_mode *op_mode); + void (*cmd_queue_full)(struct iwl_op_mode *op_mode); + void (*nic_config)(struct iwl_op_mode *op_mode); + void (*wimax_active)(struct iwl_op_mode *op_mode); + int (*enter_d0i3)(struct iwl_op_mode *op_mode); + int (*exit_d0i3)(struct iwl_op_mode *op_mode); +}; + +int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops); +void iwl_opmode_deregister(const char *name); + +/** + * struct iwl_op_mode - operational mode + * @ops: pointer to its own ops + * + * This holds an implementation of the mac80211 / fw API. + */ +struct iwl_op_mode { + const struct iwl_op_mode_ops *ops; + + char op_mode_specific[0] __aligned(sizeof(void *)); +}; + +static inline void iwl_op_mode_stop(struct iwl_op_mode *op_mode) +{ + might_sleep(); + op_mode->ops->stop(op_mode); +} + +static inline int iwl_op_mode_rx(struct iwl_op_mode *op_mode, + struct iwl_rx_cmd_buffer *rxb, + struct iwl_device_cmd *cmd) +{ + return op_mode->ops->rx(op_mode, rxb, cmd); +} + +static inline void iwl_op_mode_queue_full(struct iwl_op_mode *op_mode, + int queue) +{ + op_mode->ops->queue_full(op_mode, queue); +} + +static inline void iwl_op_mode_queue_not_full(struct iwl_op_mode *op_mode, + int queue) +{ + op_mode->ops->queue_not_full(op_mode, queue); +} + +static inline bool __must_check +iwl_op_mode_hw_rf_kill(struct iwl_op_mode *op_mode, bool state) +{ + might_sleep(); + return op_mode->ops->hw_rf_kill(op_mode, state); +} + +static inline void iwl_op_mode_free_skb(struct iwl_op_mode *op_mode, + struct sk_buff *skb) +{ + op_mode->ops->free_skb(op_mode, skb); +} + +static inline void iwl_op_mode_nic_error(struct iwl_op_mode *op_mode) +{ + op_mode->ops->nic_error(op_mode); +} + +static inline void iwl_op_mode_cmd_queue_full(struct iwl_op_mode *op_mode) +{ + op_mode->ops->cmd_queue_full(op_mode); +} + +static inline void iwl_op_mode_nic_config(struct iwl_op_mode *op_mode) +{ + might_sleep(); + op_mode->ops->nic_config(op_mode); +} + +static inline void iwl_op_mode_wimax_active(struct iwl_op_mode *op_mode) +{ + might_sleep(); + op_mode->ops->wimax_active(op_mode); +} + +static inline int iwl_op_mode_enter_d0i3(struct iwl_op_mode *op_mode) +{ + might_sleep(); + + if (!op_mode->ops->enter_d0i3) + return 0; + return op_mode->ops->enter_d0i3(op_mode); +} + +static inline int iwl_op_mode_exit_d0i3(struct iwl_op_mode *op_mode) +{ + might_sleep(); + + if (!op_mode->ops->exit_d0i3) + return 0; + return op_mode->ops->exit_d0i3(op_mode); +} + +static inline void iwl_op_mode_napi_add(struct iwl_op_mode *op_mode, + struct napi_struct *napi, + struct net_device *napi_dev, + int (*poll)(struct napi_struct *, int), + int weight) +{ + if (!op_mode->ops->napi_add) + return; + op_mode->ops->napi_add(op_mode, napi, napi_dev, poll, weight); +} + +#endif /* __iwl_op_mode_h__ */ |