mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 09:46:43 +07:00
e01ae27f8c
Both USB and PCI drivers allow a system administrator to dynamically add
USB/PCI IDs to the device table that a driver supports via the
/sys/bus/{usb,pci,pci_express}/drivers/<driver-name>/new_id files.
However, for the rt2x00 drivers using this method currently crashes the
system with a NULL pointer failure.
This is due to the set-up of rt2x00 where the probe functions require a
rt2x00_ops structure in the driver_info field of the probed device. As
this field is empty for the dynamically added devices this fails for
these devices.
Fix this by introducing driver-specific probe wrappers that do nothing
but calling the bus-specific probe functions with the rt2x00_ops structure
as an argument, rather than depending on the driver_info field.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
140 lines
4.0 KiB
C
140 lines
4.0 KiB
C
/*
|
|
Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
|
|
<http://rt2x00.serialmonkey.com>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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.,
|
|
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/*
|
|
Module: rt2x00pci
|
|
Abstract: Data structures for the rt2x00pci module.
|
|
*/
|
|
|
|
#ifndef RT2X00PCI_H
|
|
#define RT2X00PCI_H
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/pci.h>
|
|
|
|
/*
|
|
* This variable should be used with the
|
|
* pci_driver structure initialization.
|
|
*/
|
|
#define PCI_DEVICE_DATA(__ops) .driver_data = (kernel_ulong_t)(__ops)
|
|
|
|
/*
|
|
* Register access.
|
|
*/
|
|
static inline void rt2x00pci_register_read(struct rt2x00_dev *rt2x00dev,
|
|
const unsigned int offset,
|
|
u32 *value)
|
|
{
|
|
*value = readl(rt2x00dev->csr.base + offset);
|
|
}
|
|
|
|
static inline void rt2x00pci_register_multiread(struct rt2x00_dev *rt2x00dev,
|
|
const unsigned int offset,
|
|
void *value, const u32 length)
|
|
{
|
|
memcpy_fromio(value, rt2x00dev->csr.base + offset, length);
|
|
}
|
|
|
|
static inline void rt2x00pci_register_write(struct rt2x00_dev *rt2x00dev,
|
|
const unsigned int offset,
|
|
u32 value)
|
|
{
|
|
writel(value, rt2x00dev->csr.base + offset);
|
|
}
|
|
|
|
static inline void rt2x00pci_register_multiwrite(struct rt2x00_dev *rt2x00dev,
|
|
const unsigned int offset,
|
|
const void *value,
|
|
const u32 length)
|
|
{
|
|
__iowrite32_copy(rt2x00dev->csr.base + offset, value, length >> 2);
|
|
}
|
|
|
|
/**
|
|
* rt2x00pci_regbusy_read - Read from register with busy check
|
|
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
|
|
* @offset: Register offset
|
|
* @field: Field to check if register is busy
|
|
* @reg: Pointer to where register contents should be stored
|
|
*
|
|
* This function will read the given register, and checks if the
|
|
* register is busy. If it is, it will sleep for a couple of
|
|
* microseconds before reading the register again. If the register
|
|
* is not read after a certain timeout, this function will return
|
|
* FALSE.
|
|
*/
|
|
int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
|
|
const unsigned int offset,
|
|
const struct rt2x00_field32 field,
|
|
u32 *reg);
|
|
|
|
/**
|
|
* struct queue_entry_priv_pci: Per entry PCI specific information
|
|
*
|
|
* @desc: Pointer to device descriptor
|
|
* @desc_dma: DMA pointer to &desc.
|
|
* @data: Pointer to device's entry memory.
|
|
* @data_dma: DMA pointer to &data.
|
|
*/
|
|
struct queue_entry_priv_pci {
|
|
__le32 *desc;
|
|
dma_addr_t desc_dma;
|
|
};
|
|
|
|
/**
|
|
* rt2x00pci_rxdone - Handle RX done events
|
|
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
|
|
*
|
|
* Returns true if there are still rx frames pending and false if all
|
|
* pending rx frames were processed.
|
|
*/
|
|
bool rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev);
|
|
|
|
/**
|
|
* rt2x00pci_flush_queue - Flush data queue
|
|
* @queue: Data queue to stop
|
|
* @drop: True to drop all pending frames.
|
|
*
|
|
* This will wait for a maximum of 100ms, waiting for the queues
|
|
* to become empty.
|
|
*/
|
|
void rt2x00pci_flush_queue(struct data_queue *queue, bool drop);
|
|
|
|
/*
|
|
* Device initialization handlers.
|
|
*/
|
|
int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev);
|
|
void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev);
|
|
|
|
/*
|
|
* PCI driver handlers.
|
|
*/
|
|
int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops);
|
|
void rt2x00pci_remove(struct pci_dev *pci_dev);
|
|
#ifdef CONFIG_PM
|
|
int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state);
|
|
int rt2x00pci_resume(struct pci_dev *pci_dev);
|
|
#else
|
|
#define rt2x00pci_suspend NULL
|
|
#define rt2x00pci_resume NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
#endif /* RT2X00PCI_H */
|