forked from Minki/linux
cac988a682
This struct will hold pointers to all the layers, so that every layer will find the pointers it needs when calling another layer. Note that the drv_data set to struct device is now a pointer to struct iwl_shared. This solves of bug that I introduced in iwlagn: simplify the bus architecture Bug description: sysfs gets the the driver data from struct device. Till the aforementioned patch, dev_get_drvdata would return iwl_priv. After the patch, dev_get_drvdata return iwl_bus which is buggy since the sysfs handlers rely on this value, and sysfs handlers need iwl_priv. Now, dev_get_drvdata return iwl-shared. Since we have pointers to all the layers in iwl_shared, every layer will be able to get the pointer it needs: bus layer will gets iwl_bus from the PCI suspend callbacks, and the sysfs handlers will get the iwl_priv they need. In order to keep good encapsulation, we need to avoid to dereference iwl_priv from a different layer. This is why instead of including iwl-dev.h from iwl-shared.h, I added a forward declaration to iwl_priv. Moreover we keep type safety while providing encapsulation. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
142 lines
5.0 KiB
C
142 lines
5.0 KiB
C
/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*****************************************************************************/
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#ifndef __iwl_pci_h__
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#define __iwl_pci_h__
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struct iwl_shared;
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struct iwl_bus;
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/**
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* struct iwl_bus_ops - bus specific operations
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* @get_pm_support: must returns true if the bus can go to sleep
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* @apm_config: will be called during the config of the APM configuration
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* @set_drv_data: set the shared data pointer to the bus layer
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* @get_hw_id: prints the hw_id in the provided buffer
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* @write8: write a byte to register at offset ofs
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* @write32: write a dword to register at offset ofs
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* @wread32: read a dword at register at offset ofs
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*/
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struct iwl_bus_ops {
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bool (*get_pm_support)(struct iwl_bus *bus);
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void (*apm_config)(struct iwl_bus *bus);
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void (*set_drv_data)(struct iwl_bus *bus, struct iwl_shared *shrd);
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void (*get_hw_id)(struct iwl_bus *bus, char buf[], int buf_len);
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void (*write8)(struct iwl_bus *bus, u32 ofs, u8 val);
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void (*write32)(struct iwl_bus *bus, u32 ofs, u32 val);
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u32 (*read32)(struct iwl_bus *bus, u32 ofs);
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};
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struct iwl_bus {
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/* Common data to all buses */
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struct device *dev;
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struct iwl_bus_ops *ops;
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struct iwl_shared *shrd;
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unsigned int irq;
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/* pointer to bus specific struct */
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/*Ensure that this pointer will always be aligned to sizeof pointer */
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char bus_specific[0] __attribute__((__aligned__(sizeof(void *))));
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};
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static inline bool bus_get_pm_support(struct iwl_bus *bus)
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{
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return bus->ops->get_pm_support(bus);
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}
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static inline void bus_apm_config(struct iwl_bus *bus)
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{
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bus->ops->apm_config(bus);
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}
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static inline void bus_set_drv_data(struct iwl_bus *bus,
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struct iwl_shared *shrd)
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{
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bus->ops->set_drv_data(bus, shrd);
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}
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static inline void bus_get_hw_id(struct iwl_bus *bus, char buf[], int buf_len)
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{
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bus->ops->get_hw_id(bus, buf, buf_len);
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}
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static inline void bus_write8(struct iwl_bus *bus, u32 ofs, u8 val)
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{
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bus->ops->write8(bus, ofs, val);
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}
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static inline void bus_write32(struct iwl_bus *bus, u32 ofs, u32 val)
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{
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bus->ops->write32(bus, ofs, val);
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}
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static inline u32 bus_read32(struct iwl_bus *bus, u32 ofs)
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{
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return bus->ops->read32(bus, ofs);
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}
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int __must_check iwl_pci_register_driver(void);
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void iwl_pci_unregister_driver(void);
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#endif
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