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linux/drivers/net/wireless/prism54/islpci_dev.h

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/*
* Copyright (C) 2002 Intersil Americas Inc.
* Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
* Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
* Copyright (C) 2003 Aurelien Alleaume <slts@free.fr>
*
* 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
*
* 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
*
*/
#ifndef _ISLPCI_DEV_H
#define _ISLPCI_DEV_H
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <net/iw_handler.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include "isl_38xx.h"
#include "isl_oid.h"
#include "islpci_mgt.h"
/* some states might not be superflous and may be removed when
design is finalized (hvr) */
typedef enum {
PRV_STATE_OFF = 0, /* this means hw_unavailable is != 0 */
PRV_STATE_PREBOOT, /* we are in a pre-boot state (empty RAM) */
PRV_STATE_BOOT, /* boot state (fw upload, run fw) */
PRV_STATE_POSTBOOT, /* after boot state, need reset now */
PRV_STATE_PREINIT, /* pre-init state */
PRV_STATE_INIT, /* init state (restore MIB backup to device) */
PRV_STATE_READY, /* driver&device are in operational state */
PRV_STATE_SLEEP /* device in sleep mode */
} islpci_state_t;
/* ACL using MAC address */
struct mac_entry {
struct list_head _list;
char addr[ETH_ALEN];
};
struct islpci_acl {
enum { MAC_POLICY_OPEN=0, MAC_POLICY_ACCEPT=1, MAC_POLICY_REJECT=2 } policy;
struct list_head mac_list; /* a list of mac_entry */
int size; /* size of queue */
struct mutex lock; /* accessed in ioctls and trap_work */
};
struct islpci_membuf {
int size; /* size of memory */
void *mem; /* address of memory as seen by CPU */
dma_addr_t pci_addr; /* address of memory as seen by device */
};
#define MAX_BSS_WPA_IE_COUNT 64
#define MAX_WPA_IE_LEN 64
struct islpci_bss_wpa_ie {
struct list_head list;
unsigned long last_update;
u8 bssid[ETH_ALEN];
u8 wpa_ie[MAX_WPA_IE_LEN];
size_t wpa_ie_len;
};
typedef struct {
spinlock_t slock; /* generic spinlock; */
u32 priv_oid;
/* our mib cache */
u32 iw_mode;
struct rw_semaphore mib_sem;
void **mib;
char nickname[IW_ESSID_MAX_SIZE+1];
/* Take care of the wireless stats */
struct work_struct stats_work;
struct mutex stats_lock;
/* remember when we last updated the stats */
unsigned long stats_timestamp;
/* The first is accessed under semaphore locking.
* The second is the clean one we return to iwconfig.
*/
struct iw_statistics local_iwstatistics;
struct iw_statistics iwstatistics;
struct iw_spy_data spy_data; /* iwspy support */
struct iw_public_data wireless_data;
int monitor_type; /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_PRISM */
struct islpci_acl acl;
/* PCI bus allocation & configuration members */
struct pci_dev *pdev; /* PCI structure information */
char firmware[33];
void __iomem *device_base; /* ioremapped device base address */
/* consistent DMA region */
void *driver_mem_address; /* base DMA address */
dma_addr_t device_host_address; /* base DMA address (bus address) */
dma_addr_t device_psm_buffer; /* host memory for PSM buffering (bus address) */
/* our network_device structure */
struct net_device *ndev;
/* device queue interface members */
struct isl38xx_cb *control_block; /* device control block
(== driver_mem_address!) */
/* Each queue has three indexes:
* free/index_mgmt/data_rx/tx (called index, see below),
* driver_curr_frag, and device_curr_frag (in the control block)
* All indexes are ever-increasing, but interpreted modulo the
* device queue size when used.
* index <= device_curr_frag <= driver_curr_frag at all times
* For rx queues, [index, device_curr_frag) contains fragments
* that the interrupt processing needs to handle (owned by driver).
* [device_curr_frag, driver_curr_frag) is the free space in the
* rx queue, waiting for data (owned by device). The driver
* increments driver_curr_frag to indicate to the device that more
* buffers are available.
* If device_curr_frag == driver_curr_frag, no more rx buffers are
* available, and the rx DMA engine of the device is halted.
* For tx queues, [index, device_curr_frag) contains fragments
* where tx is done; they need to be freed (owned by driver).
* [device_curr_frag, driver_curr_frag) contains the frames
* that are being transferred (owned by device). The driver
* increments driver_curr_frag to indicate that more tx work
* needs to be done.
*/
u32 index_mgmt_rx; /* real index mgmt rx queue */
u32 index_mgmt_tx; /* read index mgmt tx queue */
u32 free_data_rx; /* free pointer data rx queue */
u32 free_data_tx; /* free pointer data tx queue */
u32 data_low_tx_full; /* full detected flag */
/* frame memory buffers for the device queues */
struct islpci_membuf mgmt_tx[ISL38XX_CB_MGMT_QSIZE];
struct islpci_membuf mgmt_rx[ISL38XX_CB_MGMT_QSIZE];
struct sk_buff *data_low_tx[ISL38XX_CB_TX_QSIZE];
struct sk_buff *data_low_rx[ISL38XX_CB_RX_QSIZE];
dma_addr_t pci_map_tx_address[ISL38XX_CB_TX_QSIZE];
dma_addr_t pci_map_rx_address[ISL38XX_CB_RX_QSIZE];
/* driver network interface members */
struct net_device_stats statistics;
/* wait for a reset interrupt */
wait_queue_head_t reset_done;
/* used by islpci_mgt_transaction */
struct mutex mgmt_lock; /* serialize access to mailbox and wqueue */
struct islpci_mgmtframe *mgmt_received; /* mbox for incoming frame */
wait_queue_head_t mgmt_wqueue; /* waitqueue for mbox */
/* state machine */
islpci_state_t state;
int state_off; /* enumeration of off-state, if 0 then
* we're not in any off-state */
/* WPA stuff */
int wpa; /* WPA mode enabled */
struct list_head bss_wpa_list;
int num_bss_wpa;
struct mutex wpa_lock;
u8 wpa_ie[MAX_WPA_IE_LEN];
size_t wpa_ie_len;
struct work_struct reset_task;
int reset_task_pending;
} islpci_private;
static inline islpci_state_t
islpci_get_state(islpci_private *priv)
{
/* lock */
return priv->state;
/* unlock */
}
islpci_state_t islpci_set_state(islpci_private *priv, islpci_state_t new_state);
#define ISLPCI_TX_TIMEOUT (2*HZ)
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 06:55:46 -07:00
irqreturn_t islpci_interrupt(int, void *);
int prism54_post_setup(islpci_private *, int);
int islpci_reset(islpci_private *, int);
static inline void
islpci_trigger(islpci_private *priv)
{
isl38xx_trigger_device(islpci_get_state(priv) == PRV_STATE_SLEEP,
priv->device_base);
}
int islpci_free_memory(islpci_private *);
struct net_device *islpci_setup(struct pci_dev *);
#define DRV_NAME "prism54"
#define DRV_VERSION "1.2"
#endif /* _ISLPCI_DEV_H */