linux/drivers/net/wireless/rt2x00/rt2x00pci.c
Johannes Berg 4150c57212 [PATCH] mac80211: revamp interface and filter configuration
Drivers are currently supposed to keep track of monitor
interfaces if they allow so-called "hard" monitor, and
they are also supposed to keep track of multicast etc.

This patch changes that, replaces the set_multicast_list()
callback with a new configure_filter() callback that takes
filter flags (FIF_*) instead of interface flags (IFF_*).
For a driver, this means it should open the filter as much
as necessary to get all frames requested by the filter flags.
Accordingly, the filter flags are named "positively", e.g.
FIF_ALLMULTI.

Multicast filtering is a bit special in that drivers that
have no multicast address filters need to allow multicast
frames through when either the FIF_ALLMULTI flag is set or
when the mc_count value is positive.

At the same time, drivers are no longer notified about
monitor interfaces at all, this means they now need to
implement the start() and stop() callbacks and the new
change_filter_flags() callback. Also, the start()/stop()
ordering changed, start() is now called *before* any
add_interface() as it really should be, and stop() after
any remove_interface().

The patch also changes the behaviour of setting the bssid
to multicast for scanning when IEEE80211_HW_NO_PROBE_FILTERING
is set; the IEEE80211_HW_NO_PROBE_FILTERING flag is removed
and the filter flag FIF_BCN_PRBRESP_PROMISC introduced.
This is a lot more efficient for hardware like b43 that
supports it and other hardware can still set the BSSID
to all-ones.

Driver modifications by Johannes Berg (b43 & iwlwifi), Michael Wu
(rtl8187, adm8211, and p54), Larry Finger (b43legacy), and
Ivo van Doorn (rt2x00).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Michael Wu <flamingice@sourmilk.net>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-10-10 16:52:57 -07:00

475 lines
11 KiB
C

/*
Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
<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: rt2x00 generic pci device routines.
*/
/*
* Set enviroment defines for rt2x00.h
*/
#define DRV_NAME "rt2x00pci"
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include "rt2x00.h"
#include "rt2x00pci.h"
/*
* Beacon handlers.
*/
int rt2x00pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
struct ieee80211_tx_control *control)
{
struct rt2x00_dev *rt2x00dev = hw->priv;
struct data_ring *ring =
rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
struct data_entry *entry = rt2x00_get_data_entry(ring);
/*
* Just in case mac80211 doesn't set this correctly,
* but we need this queue set for the descriptor
* initialization.
*/
control->queue = IEEE80211_TX_QUEUE_BEACON;
/*
* Update the beacon entry.
*/
memcpy(entry->data_addr, skb->data, skb->len);
rt2x00lib_write_tx_desc(rt2x00dev, entry->priv,
(struct ieee80211_hdr *)skb->data,
skb->len, control);
/*
* Enable beacon generation.
*/
rt2x00dev->ops->lib->kick_tx_queue(rt2x00dev, control->queue);
return 0;
}
EXPORT_SYMBOL_GPL(rt2x00pci_beacon_update);
/*
* TX data handlers.
*/
int rt2x00pci_write_tx_data(struct rt2x00_dev *rt2x00dev,
struct data_ring *ring, struct sk_buff *skb,
struct ieee80211_tx_control *control)
{
struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
struct data_entry *entry = rt2x00_get_data_entry(ring);
struct data_desc *txd = entry->priv;
u32 word;
if (rt2x00_ring_full(ring)) {
ieee80211_stop_queue(rt2x00dev->hw, control->queue);
return -EINVAL;
}
rt2x00_desc_read(txd, 0, &word);
if (rt2x00_get_field32(word, TXD_ENTRY_OWNER_NIC) ||
rt2x00_get_field32(word, TXD_ENTRY_VALID)) {
ERROR(rt2x00dev,
"Arrived at non-free entry in the non-full queue %d.\n"
"Please file bug report to %s.\n",
control->queue, DRV_PROJECT);
ieee80211_stop_queue(rt2x00dev->hw, control->queue);
return -EINVAL;
}
entry->skb = skb;
memcpy(&entry->tx_status.control, control, sizeof(*control));
memcpy(entry->data_addr, skb->data, skb->len);
rt2x00lib_write_tx_desc(rt2x00dev, txd, ieee80211hdr,
skb->len, control);
rt2x00_ring_index_inc(ring);
if (rt2x00_ring_full(ring))
ieee80211_stop_queue(rt2x00dev->hw, control->queue);
return 0;
}
EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
/*
* RX data handlers.
*/
void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
{
struct data_ring *ring = rt2x00dev->rx;
struct data_entry *entry;
struct data_desc *rxd;
struct sk_buff *skb;
struct rxdata_entry_desc desc;
u32 word;
while (1) {
entry = rt2x00_get_data_entry(ring);
rxd = entry->priv;
rt2x00_desc_read(rxd, 0, &word);
if (rt2x00_get_field32(word, RXD_ENTRY_OWNER_NIC))
break;
memset(&desc, 0x00, sizeof(desc));
rt2x00dev->ops->lib->fill_rxdone(entry, &desc);
/*
* Allocate the sk_buffer, initialize it and copy
* all data into it.
*/
skb = dev_alloc_skb(desc.size + NET_IP_ALIGN);
if (!skb)
return;
skb_reserve(skb, NET_IP_ALIGN);
skb_put(skb, desc.size);
memcpy(skb->data, entry->data_addr, desc.size);
/*
* Send the frame to rt2x00lib for further processing.
*/
rt2x00lib_rxdone(entry, skb, &desc);
if (test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags)) {
rt2x00_set_field32(&word, RXD_ENTRY_OWNER_NIC, 1);
rt2x00_desc_write(rxd, 0, word);
}
rt2x00_ring_index_inc(ring);
}
}
EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
/*
* Device initialization handlers.
*/
#define priv_offset(__ring, __i) \
({ \
ring->data_addr + (i * ring->desc_size); \
})
#define data_addr_offset(__ring, __i) \
({ \
(__ring)->data_addr + \
((__ring)->stats.limit * (__ring)->desc_size) + \
((__i) * (__ring)->data_size); \
})
#define data_dma_offset(__ring, __i) \
({ \
(__ring)->data_dma + \
((__ring)->stats.limit * (__ring)->desc_size) + \
((__i) * (__ring)->data_size); \
})
static int rt2x00pci_alloc_dma(struct rt2x00_dev *rt2x00dev,
struct data_ring *ring)
{
unsigned int i;
/*
* Allocate DMA memory for descriptor and buffer.
*/
ring->data_addr = pci_alloc_consistent(rt2x00dev_pci(rt2x00dev),
rt2x00_get_ring_size(ring),
&ring->data_dma);
if (!ring->data_addr)
return -ENOMEM;
/*
* Initialize all ring entries to contain valid
* addresses.
*/
for (i = 0; i < ring->stats.limit; i++) {
ring->entry[i].priv = priv_offset(ring, i);
ring->entry[i].data_addr = data_addr_offset(ring, i);
ring->entry[i].data_dma = data_dma_offset(ring, i);
}
return 0;
}
static void rt2x00pci_free_dma(struct rt2x00_dev *rt2x00dev,
struct data_ring *ring)
{
if (ring->data_addr)
pci_free_consistent(rt2x00dev_pci(rt2x00dev),
rt2x00_get_ring_size(ring),
ring->data_addr, ring->data_dma);
ring->data_addr = NULL;
}
int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
{
struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev);
struct data_ring *ring;
int status;
/*
* Allocate DMA
*/
ring_for_each(rt2x00dev, ring) {
status = rt2x00pci_alloc_dma(rt2x00dev, ring);
if (status)
goto exit;
}
/*
* Register interrupt handler.
*/
status = request_irq(pci_dev->irq, rt2x00dev->ops->lib->irq_handler,
IRQF_SHARED, pci_name(pci_dev), rt2x00dev);
if (status) {
ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
pci_dev->irq, status);
return status;
}
return 0;
exit:
rt2x00pci_uninitialize(rt2x00dev);
return status;
}
EXPORT_SYMBOL_GPL(rt2x00pci_initialize);
void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
{
struct data_ring *ring;
/*
* Free irq line.
*/
free_irq(rt2x00dev_pci(rt2x00dev)->irq, rt2x00dev);
/*
* Free DMA
*/
ring_for_each(rt2x00dev, ring)
rt2x00pci_free_dma(rt2x00dev, ring);
}
EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize);
/*
* PCI driver handlers.
*/
static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
{
kfree(rt2x00dev->rf);
rt2x00dev->rf = NULL;
kfree(rt2x00dev->eeprom);
rt2x00dev->eeprom = NULL;
if (rt2x00dev->csr_addr) {
iounmap(rt2x00dev->csr_addr);
rt2x00dev->csr_addr = NULL;
}
}
static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
{
struct pci_dev *pci_dev = rt2x00dev_pci(rt2x00dev);
rt2x00dev->csr_addr = ioremap(pci_resource_start(pci_dev, 0),
pci_resource_len(pci_dev, 0));
if (!rt2x00dev->csr_addr)
goto exit;
rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
if (!rt2x00dev->eeprom)
goto exit;
rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
if (!rt2x00dev->rf)
goto exit;
return 0;
exit:
ERROR_PROBE("Failed to allocate registers.\n");
rt2x00pci_free_reg(rt2x00dev);
return -ENOMEM;
}
int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
{
struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_data;
struct ieee80211_hw *hw;
struct rt2x00_dev *rt2x00dev;
int retval;
retval = pci_request_regions(pci_dev, pci_name(pci_dev));
if (retval) {
ERROR_PROBE("PCI request regions failed.\n");
return retval;
}
retval = pci_enable_device(pci_dev);
if (retval) {
ERROR_PROBE("Enable device failed.\n");
goto exit_release_regions;
}
pci_set_master(pci_dev);
if (pci_set_mwi(pci_dev))
ERROR_PROBE("MWI not available.\n");
if (pci_set_dma_mask(pci_dev, DMA_64BIT_MASK) &&
pci_set_dma_mask(pci_dev, DMA_32BIT_MASK)) {
ERROR_PROBE("PCI DMA not supported.\n");
retval = -EIO;
goto exit_disable_device;
}
hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
if (!hw) {
ERROR_PROBE("Failed to allocate hardware.\n");
retval = -ENOMEM;
goto exit_disable_device;
}
pci_set_drvdata(pci_dev, hw);
rt2x00dev = hw->priv;
rt2x00dev->dev = pci_dev;
rt2x00dev->ops = ops;
rt2x00dev->hw = hw;
retval = rt2x00pci_alloc_reg(rt2x00dev);
if (retval)
goto exit_free_device;
retval = rt2x00lib_probe_dev(rt2x00dev);
if (retval)
goto exit_free_reg;
return 0;
exit_free_reg:
rt2x00pci_free_reg(rt2x00dev);
exit_free_device:
ieee80211_free_hw(hw);
exit_disable_device:
if (retval != -EBUSY)
pci_disable_device(pci_dev);
exit_release_regions:
pci_release_regions(pci_dev);
pci_set_drvdata(pci_dev, NULL);
return retval;
}
EXPORT_SYMBOL_GPL(rt2x00pci_probe);
void rt2x00pci_remove(struct pci_dev *pci_dev)
{
struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
struct rt2x00_dev *rt2x00dev = hw->priv;
/*
* Free all allocated data.
*/
rt2x00lib_remove_dev(rt2x00dev);
rt2x00pci_free_reg(rt2x00dev);
ieee80211_free_hw(hw);
/*
* Free the PCI device data.
*/
pci_set_drvdata(pci_dev, NULL);
pci_disable_device(pci_dev);
pci_release_regions(pci_dev);
}
EXPORT_SYMBOL_GPL(rt2x00pci_remove);
#ifdef CONFIG_PM
int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
{
struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
struct rt2x00_dev *rt2x00dev = hw->priv;
int retval;
retval = rt2x00lib_suspend(rt2x00dev, state);
if (retval)
return retval;
rt2x00pci_free_reg(rt2x00dev);
pci_save_state(pci_dev);
pci_disable_device(pci_dev);
return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
}
EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
int rt2x00pci_resume(struct pci_dev *pci_dev)
{
struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
struct rt2x00_dev *rt2x00dev = hw->priv;
int retval;
if (pci_set_power_state(pci_dev, PCI_D0) ||
pci_enable_device(pci_dev) ||
pci_restore_state(pci_dev)) {
ERROR(rt2x00dev, "Failed to resume device.\n");
return -EIO;
}
retval = rt2x00pci_alloc_reg(rt2x00dev);
if (retval)
return retval;
retval = rt2x00lib_resume(rt2x00dev);
if (retval)
goto exit_free_reg;
return 0;
exit_free_reg:
rt2x00pci_free_reg(rt2x00dev);
return retval;
}
EXPORT_SYMBOL_GPL(rt2x00pci_resume);
#endif /* CONFIG_PM */
/*
* rt2x00pci module information.
*/
MODULE_AUTHOR(DRV_PROJECT);
MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("rt2x00 library");
MODULE_LICENSE("GPL");