cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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rt2x00pci.c (4239B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
      4	<http://rt2x00.serialmonkey.com>
      5
      6 */
      7
      8/*
      9	Module: rt2x00pci
     10	Abstract: rt2x00 generic pci device routines.
     11 */
     12
     13#include <linux/dma-mapping.h>
     14#include <linux/kernel.h>
     15#include <linux/module.h>
     16#include <linux/pci.h>
     17#include <linux/slab.h>
     18
     19#include "rt2x00.h"
     20#include "rt2x00pci.h"
     21
     22/*
     23 * PCI driver handlers.
     24 */
     25static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
     26{
     27	kfree(rt2x00dev->rf);
     28	rt2x00dev->rf = NULL;
     29
     30	kfree(rt2x00dev->eeprom);
     31	rt2x00dev->eeprom = NULL;
     32
     33	if (rt2x00dev->csr.base) {
     34		iounmap(rt2x00dev->csr.base);
     35		rt2x00dev->csr.base = NULL;
     36	}
     37}
     38
     39static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
     40{
     41	struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
     42
     43	rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
     44	if (!rt2x00dev->csr.base)
     45		goto exit;
     46
     47	rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
     48	if (!rt2x00dev->eeprom)
     49		goto exit;
     50
     51	rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
     52	if (!rt2x00dev->rf)
     53		goto exit;
     54
     55	return 0;
     56
     57exit:
     58	rt2x00_probe_err("Failed to allocate registers\n");
     59
     60	rt2x00pci_free_reg(rt2x00dev);
     61
     62	return -ENOMEM;
     63}
     64
     65int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
     66{
     67	struct ieee80211_hw *hw;
     68	struct rt2x00_dev *rt2x00dev;
     69	int retval;
     70	u16 chip;
     71
     72	retval = pci_enable_device(pci_dev);
     73	if (retval) {
     74		rt2x00_probe_err("Enable device failed\n");
     75		return retval;
     76	}
     77
     78	retval = pci_request_regions(pci_dev, pci_name(pci_dev));
     79	if (retval) {
     80		rt2x00_probe_err("PCI request regions failed\n");
     81		goto exit_disable_device;
     82	}
     83
     84	pci_set_master(pci_dev);
     85
     86	if (pci_set_mwi(pci_dev))
     87		rt2x00_probe_err("MWI not available\n");
     88
     89	if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
     90		rt2x00_probe_err("PCI DMA not supported\n");
     91		retval = -EIO;
     92		goto exit_release_regions;
     93	}
     94
     95	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
     96	if (!hw) {
     97		rt2x00_probe_err("Failed to allocate hardware\n");
     98		retval = -ENOMEM;
     99		goto exit_release_regions;
    100	}
    101
    102	pci_set_drvdata(pci_dev, hw);
    103
    104	rt2x00dev = hw->priv;
    105	rt2x00dev->dev = &pci_dev->dev;
    106	rt2x00dev->ops = ops;
    107	rt2x00dev->hw = hw;
    108	rt2x00dev->irq = pci_dev->irq;
    109	rt2x00dev->name = ops->name;
    110
    111	if (pci_is_pcie(pci_dev))
    112		rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
    113	else
    114		rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
    115
    116	retval = rt2x00pci_alloc_reg(rt2x00dev);
    117	if (retval)
    118		goto exit_free_device;
    119
    120	/*
    121	 * Because rt3290 chip use different efuse offset to read efuse data.
    122	 * So before read efuse it need to indicate it is the
    123	 * rt3290 or not.
    124	 */
    125	pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
    126	rt2x00dev->chip.rt = chip;
    127
    128	retval = rt2x00lib_probe_dev(rt2x00dev);
    129	if (retval)
    130		goto exit_free_reg;
    131
    132	return 0;
    133
    134exit_free_reg:
    135	rt2x00pci_free_reg(rt2x00dev);
    136
    137exit_free_device:
    138	ieee80211_free_hw(hw);
    139
    140exit_release_regions:
    141	pci_clear_mwi(pci_dev);
    142	pci_release_regions(pci_dev);
    143
    144exit_disable_device:
    145	pci_disable_device(pci_dev);
    146
    147	return retval;
    148}
    149EXPORT_SYMBOL_GPL(rt2x00pci_probe);
    150
    151void rt2x00pci_remove(struct pci_dev *pci_dev)
    152{
    153	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
    154	struct rt2x00_dev *rt2x00dev = hw->priv;
    155
    156	/*
    157	 * Free all allocated data.
    158	 */
    159	rt2x00lib_remove_dev(rt2x00dev);
    160	rt2x00pci_free_reg(rt2x00dev);
    161	ieee80211_free_hw(hw);
    162
    163	/*
    164	 * Free the PCI device data.
    165	 */
    166	pci_clear_mwi(pci_dev);
    167	pci_disable_device(pci_dev);
    168	pci_release_regions(pci_dev);
    169}
    170EXPORT_SYMBOL_GPL(rt2x00pci_remove);
    171
    172static int __maybe_unused rt2x00pci_suspend(struct device *dev)
    173{
    174	struct ieee80211_hw *hw = dev_get_drvdata(dev);
    175	struct rt2x00_dev *rt2x00dev = hw->priv;
    176
    177	return rt2x00lib_suspend(rt2x00dev);
    178}
    179
    180static int __maybe_unused rt2x00pci_resume(struct device *dev)
    181{
    182	struct ieee80211_hw *hw = dev_get_drvdata(dev);
    183	struct rt2x00_dev *rt2x00dev = hw->priv;
    184
    185	return rt2x00lib_resume(rt2x00dev);
    186}
    187
    188SIMPLE_DEV_PM_OPS(rt2x00pci_pm_ops, rt2x00pci_suspend, rt2x00pci_resume);
    189EXPORT_SYMBOL_GPL(rt2x00pci_pm_ops);
    190
    191/*
    192 * rt2x00pci module information.
    193 */
    194MODULE_AUTHOR(DRV_PROJECT);
    195MODULE_VERSION(DRV_VERSION);
    196MODULE_DESCRIPTION("rt2x00 pci library");
    197MODULE_LICENSE("GPL");