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/irqreturn.h>
26 #include <linux/netdevice.h>
27 #include <linux/wireless.h>
28 #include <net/iw_handler.h>
29 #include <linux/list.h>
30 #include <linux/mutex.h>
31
32 #include "isl_38xx.h"
33 #include "isl_oid.h"
34 #include "islpci_mgt.h"
35
36 /* some states might not be superflous and may be removed when
37 design is finalized (hvr) */
38 typedef enum {
39 PRV_STATE_OFF = 0, /* this means hw_unavailable is != 0 */
40 PRV_STATE_PREBOOT, /* we are in a pre-boot state (empty RAM) */
41 PRV_STATE_BOOT, /* boot state (fw upload, run fw) */
42 PRV_STATE_POSTBOOT, /* after boot state, need reset now */
43 PRV_STATE_PREINIT, /* pre-init state */
44 PRV_STATE_INIT, /* init state (restore MIB backup to device) */
45 PRV_STATE_READY, /* driver&device are in operational state */
46 PRV_STATE_SLEEP /* device in sleep mode */
47 } islpci_state_t;
48
49 /* ACL using MAC address */
50 struct mac_entry {
51 struct list_head _list;
52 char addr[ETH_ALEN];
53 };
54
55 struct islpci_acl {
56 enum { MAC_POLICY_OPEN=0, MAC_POLICY_ACCEPT=1, MAC_POLICY_REJECT=2 } policy;
57 struct list_head mac_list; /* a list of mac_entry */
58 int size; /* size of queue */
59 struct mutex lock; /* accessed in ioctls and trap_work */
60 };
61
62 struct islpci_membuf {
63 int size; /* size of memory */
64 void *mem; /* address of memory as seen by CPU */
65 dma_addr_t pci_addr; /* address of memory as seen by device */
66 };
67
68 #define MAX_BSS_WPA_IE_COUNT 64
69 #define MAX_WPA_IE_LEN 64
70 struct islpci_bss_wpa_ie {
71 struct list_head list;
72 unsigned long last_update;
73 u8 bssid[ETH_ALEN];
74 u8 wpa_ie[MAX_WPA_IE_LEN];
75 size_t wpa_ie_len;
76
77 };
78
79 typedef struct {
80 spinlock_t slock; /* generic spinlock; */
81
82 u32 priv_oid;
83
84 /* our mib cache */
85 u32 iw_mode;
86 struct rw_semaphore mib_sem;
87 void **mib;
88 char nickname[IW_ESSID_MAX_SIZE+1];
89
90 /* Take care of the wireless stats */
91 struct work_struct stats_work;
92 struct mutex stats_lock;
93 /* remember when we last updated the stats */
94 unsigned long stats_timestamp;
95 /* The first is accessed under semaphore locking.
96 * The second is the clean one we return to iwconfig.
97 */
98 struct iw_statistics local_iwstatistics;
99 struct iw_statistics iwstatistics;
100
101 struct iw_spy_data spy_data; /* iwspy support */
102
103 struct iw_public_data wireless_data;
104
105 int monitor_type; /* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_PRISM */
106
107 struct islpci_acl acl;
108
109 /* PCI bus allocation & configuration members */
110 struct pci_dev *pdev; /* PCI structure information */
111 char firmware[33];
112
113 void __iomem *device_base; /* ioremapped device base address */
114
115 /* consistent DMA region */
116 void *driver_mem_address; /* base DMA address */
117 dma_addr_t device_host_address; /* base DMA address (bus address) */
118 dma_addr_t device_psm_buffer; /* host memory for PSM buffering (bus address) */
119
120 /* our network_device structure */
121 struct net_device *ndev;
122
123 /* device queue interface members */
124 struct isl38xx_cb *control_block; /* device control block
125 (== driver_mem_address!) */
126
127 /* Each queue has three indexes:
128 * free/index_mgmt/data_rx/tx (called index, see below),
129 * driver_curr_frag, and device_curr_frag (in the control block)
130 * All indexes are ever-increasing, but interpreted modulo the
131 * device queue size when used.
132 * index <= device_curr_frag <= driver_curr_frag at all times
133 * For rx queues, [index, device_curr_frag) contains fragments
134 * that the interrupt processing needs to handle (owned by driver).
135 * [device_curr_frag, driver_curr_frag) is the free space in the
136 * rx queue, waiting for data (owned by device). The driver
137 * increments driver_curr_frag to indicate to the device that more
138 * buffers are available.
139 * If device_curr_frag == driver_curr_frag, no more rx buffers are
140 * available, and the rx DMA engine of the device is halted.
141 * For tx queues, [index, device_curr_frag) contains fragments
142 * where tx is done; they need to be freed (owned by driver).
143 * [device_curr_frag, driver_curr_frag) contains the frames
144 * that are being transferred (owned by device). The driver
145 * increments driver_curr_frag to indicate that more tx work
146 * needs to be done.
147 */
148 u32 index_mgmt_rx; /* real index mgmt rx queue */
149 u32 index_mgmt_tx; /* read index mgmt tx queue */
150 u32 free_data_rx; /* free pointer data rx queue */
151 u32 free_data_tx; /* free pointer data tx queue */
152 u32 data_low_tx_full; /* full detected flag */
153
154 /* frame memory buffers for the device queues */
155 struct islpci_membuf mgmt_tx[ISL38XX_CB_MGMT_QSIZE];
156 struct islpci_membuf mgmt_rx[ISL38XX_CB_MGMT_QSIZE];
157 struct sk_buff *data_low_tx[ISL38XX_CB_TX_QSIZE];
158 struct sk_buff *data_low_rx[ISL38XX_CB_RX_QSIZE];
159 dma_addr_t pci_map_tx_address[ISL38XX_CB_TX_QSIZE];
160 dma_addr_t pci_map_rx_address[ISL38XX_CB_RX_QSIZE];
161
162 /* wait for a reset interrupt */
163 wait_queue_head_t reset_done;
164
165 /* used by islpci_mgt_transaction */
166 struct mutex mgmt_lock; /* serialize access to mailbox and wqueue */
167 struct islpci_mgmtframe *mgmt_received; /* mbox for incoming frame */
168 wait_queue_head_t mgmt_wqueue; /* waitqueue for mbox */
169
170 /* state machine */
171 islpci_state_t state;
172 int state_off; /* enumeration of off-state, if 0 then
173 * we're not in any off-state */
174
175 /* WPA stuff */
176 int wpa; /* WPA mode enabled */
177 struct list_head bss_wpa_list;
178 int num_bss_wpa;
179 struct mutex wpa_lock;
180 u8 wpa_ie[MAX_WPA_IE_LEN];
181 size_t wpa_ie_len;
182
183 struct work_struct reset_task;
184 int reset_task_pending;
185 } islpci_private;
186
187 static inline islpci_state_t
islpci_get_state(islpci_private * priv)188 islpci_get_state(islpci_private *priv)
189 {
190 /* lock */
191 return priv->state;
192 /* unlock */
193 }
194
195 islpci_state_t islpci_set_state(islpci_private *priv, islpci_state_t new_state);
196
197 #define ISLPCI_TX_TIMEOUT (2*HZ)
198
199 irqreturn_t islpci_interrupt(int, void *);
200
201 int prism54_post_setup(islpci_private *, int);
202 int islpci_reset(islpci_private *, int);
203
204 static inline void
islpci_trigger(islpci_private * priv)205 islpci_trigger(islpci_private *priv)
206 {
207 isl38xx_trigger_device(islpci_get_state(priv) == PRV_STATE_SLEEP,
208 priv->device_base);
209 }
210
211 int islpci_free_memory(islpci_private *);
212 struct net_device *islpci_setup(struct pci_dev *);
213
214 #define DRV_NAME "prism54"
215 #define DRV_VERSION "1.2"
216
217 #endif /* _ISLPCI_DEV_H */
218