drivers/net/wireless/prism54/islpci_dev.h

   1 /*
   2  *  Copyright (C) 2002 Intersil Americas Inc.
   3  *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
   4  *  Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
   5  *  Copyright (C) 2003 Aurelien Alleaume <slts@free.fr>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #ifndef _ISLPCI_DEV_H
  23 #define _ISLPCI_DEV_H
  24
  25 #include <linux/netdevice.h>
  26 #include <linux/wireless.h>
  27 #include <net/iw_handler.h>
  28 #include <linux/list.h>
  29
  30 #include "isl_38xx.h"
  31 #include "isl_oid.h"
  32 #include "islpci_mgt.h"
  33
  34 /* some states might not be superflous and may be removed when
  35    design is finalized (hvr) */
  36 typedef enum {
  37         PRV_STATE_OFF = 0,      /* this means hw_unavailable is != 0 */
  38         PRV_STATE_PREBOOT,      /* we are in a pre-boot state (empty RAM) */
  39         PRV_STATE_BOOT,         /* boot state (fw upload, run fw) */
  40         PRV_STATE_POSTBOOT,     /* after boot state, need reset now */
  41         PRV_STATE_PREINIT,      /* pre-init state */
  42         PRV_STATE_INIT,         /* init state (restore MIB backup to device) */
  43         PRV_STATE_READY,        /* driver&device are in operational state */
  44         PRV_STATE_SLEEP         /* device in sleep mode */
  45 } islpci_state_t;
  46
  47 /* ACL using MAC address */
  48 struct mac_entry {
  49    struct list_head _list;
  50    char addr[ETH_ALEN];
  51 };
  52
  53 struct islpci_acl {
  54    enum { MAC_POLICY_OPEN=0, MAC_POLICY_ACCEPT=1, MAC_POLICY_REJECT=2 } policy;
  55    struct list_head mac_list;  /* a list of mac_entry */
  56    int size;   /* size of queue */
  57    struct semaphore sem;   /* accessed in ioctls and trap_work */
  58 };
  59
  60 struct islpci_membuf {
  61         int size;                   /* size of memory */
  62         void *mem;                  /* address of memory as seen by CPU */
  63         dma_addr_t pci_addr;        /* address of memory as seen by device */
  64 };
  65
  66 #define MAX_BSS_WPA_IE_COUNT 64
  67 #define MAX_WPA_IE_LEN 64
  68 struct islpci_bss_wpa_ie {
  69         struct list_head list;
  70         unsigned long last_update;
  71         u8 bssid[ETH_ALEN];
  72         u8 wpa_ie[MAX_WPA_IE_LEN];
  73         size_t wpa_ie_len;
  74
  75 };
  76
  77 typedef struct {
  78         spinlock_t slock;       /* generic spinlock; */
  79
  80         u32 priv_oid;
  81
  82         /* our mib cache */
  83         u32 iw_mode;
  84         struct rw_semaphore mib_sem;
  85         void **mib;
  86         char nickname[IW_ESSID_MAX_SIZE+1];
  87
  88         /* Take care of the wireless stats */
  89         struct work_struct stats_work;
  90         struct semaphore stats_sem;
  91         /* remember when we last updated the stats */
  92         unsigned long stats_timestamp;
  93         /* The first is accessed under semaphore locking.
  94          * The second is the clean one we return to iwconfig.
  95          */
  96         struct iw_statistics local_iwstatistics;
  97         struct iw_statistics iwstatistics;
  98
  99         struct iw_spy_data spy_data; /* iwspy support */
 100
 101         struct iw_public_data wireless_data;
 102
 103         int monitor_type; /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_PRISM */
 104
 105         struct islpci_acl acl;
 106
 107         /* PCI bus allocation & configuration members */
 108         struct pci_dev *pdev;   /* PCI structure information */
 109         char firmware[33];
 110
 111         void __iomem *device_base;      /* ioremapped device base address */
 112
 113         /* consistent DMA region */
 114         void *driver_mem_address;       /* base DMA address */
 115         dma_addr_t device_host_address; /* base DMA address (bus address) */
 116         dma_addr_t device_psm_buffer;   /* host memory for PSM buffering (bus address) */
 117
 118         /* our network_device structure  */
 119         struct net_device *ndev;
 120
 121         /* device queue interface members */
 122         struct isl38xx_cb *control_block;       /* device control block
 123                                                            (== driver_mem_address!) */
 124
 125         /* Each queue has three indexes:
 126          *   free/index_mgmt/data_rx/tx (called index, see below),
 127          *   driver_curr_frag, and device_curr_frag (in the control block)
 128          * All indexes are ever-increasing, but interpreted modulo the
 129          * device queue size when used.
 130          *   index <= device_curr_frag <= driver_curr_frag  at all times
 131          * For rx queues, [index, device_curr_frag) contains fragments
 132          * that the interrupt processing needs to handle (owned by driver).
 133          * [device_curr_frag, driver_curr_frag) is the free space in the
 134          * rx queue, waiting for data (owned by device).  The driver
 135          * increments driver_curr_frag to indicate to the device that more
 136          * buffers are available.
 137          * If device_curr_frag == driver_curr_frag, no more rx buffers are
 138          * available, and the rx DMA engine of the device is halted.
 139          * For tx queues, [index, device_curr_frag) contains fragments
 140          * where tx is done; they need to be freed (owned by driver).
 141          * [device_curr_frag, driver_curr_frag) contains the frames
 142          * that are being transferred (owned by device).  The driver
 143          * increments driver_curr_frag to indicate that more tx work
 144          * needs to be done.
 145          */
 146         u32 index_mgmt_rx;              /* real index mgmt rx queue */
 147         u32 index_mgmt_tx;              /* read index mgmt tx queue */
 148         u32 free_data_rx;       /* free pointer data rx queue */
 149         u32 free_data_tx;       /* free pointer data tx queue */
 150         u32 data_low_tx_full;   /* full detected flag */
 151
 152         /* frame memory buffers for the device queues */
 153         struct islpci_membuf mgmt_tx[ISL38XX_CB_MGMT_QSIZE];
 154         struct islpci_membuf mgmt_rx[ISL38XX_CB_MGMT_QSIZE];
 155         struct sk_buff *data_low_tx[ISL38XX_CB_TX_QSIZE];
 156         struct sk_buff *data_low_rx[ISL38XX_CB_RX_QSIZE];
 157         dma_addr_t pci_map_tx_address[ISL38XX_CB_TX_QSIZE];
 158         dma_addr_t pci_map_rx_address[ISL38XX_CB_RX_QSIZE];
 159
 160         /* driver network interface members */
 161         struct net_device_stats statistics;
 162
 163         /* wait for a reset interrupt */
 164         wait_queue_head_t reset_done;
 165
 166         /* used by islpci_mgt_transaction */
 167         struct semaphore mgmt_sem; /* serialize access to mailbox and wqueue */
 168         struct islpci_mgmtframe *mgmt_received;   /* mbox for incoming frame */
 169         wait_queue_head_t mgmt_wqueue;            /* waitqueue for mbox */
 170
 171         /* state machine */
 172         islpci_state_t state;
 173         int state_off;          /* enumeration of off-state, if 0 then
 174                                  * we're not in any off-state */
 175
 176         /* WPA stuff */
 177         int wpa; /* WPA mode enabled */
 178         struct list_head bss_wpa_list;
 179         int num_bss_wpa;
 180         struct semaphore wpa_sem;
 181         u8 wpa_ie[MAX_WPA_IE_LEN];
 182         size_t wpa_ie_len;
 183
 184         struct work_struct reset_task;
 185         int reset_task_pending;
 186 } islpci_private;
 187
 188 static inline islpci_state_t
 189 islpci_get_state(islpci_private *priv)
 190 {
 191         /* lock */
 192         return priv->state;
 193         /* unlock */
 194 }
 195
 196 islpci_state_t islpci_set_state(islpci_private *priv, islpci_state_t new_state);
 197
 198 #define ISLPCI_TX_TIMEOUT               (2*HZ)
 199
 200 irqreturn_t islpci_interrupt(int, void *);
 201
 202 int prism54_post_setup(islpci_private *, int);
 203 int islpci_reset(islpci_private *, int);
 204
 205 static inline void
 206 islpci_trigger(islpci_private *priv)
 207 {
 208         isl38xx_trigger_device(islpci_get_state(priv) == PRV_STATE_SLEEP,
 209                                priv->device_base);
 210 }
 211
 212 int islpci_free_memory(islpci_private *);
 213 struct net_device *islpci_setup(struct pci_dev *);
 214 #endif                          /* _ISLPCI_DEV_H */