libipw: initiate cfg80211 API conversion (v2)

Initiate the conversion of libipw to the new cfg80211 configuration API.

For now, leave CONFIG_IPW2200_PROMISCUOUS stuff alone.  Eventually
migrate it to cfg80211 when the add/del/change_virtual_intf methods
are implemented.

(v2: Fix unconditional wiphy_unregister in libipw which was causing
     problems for ipw2100, somewhat based on prior attempted fix
     by Zhu Yi <yi.zhu@intel.com>.  Previously both original version of
     this patch and Zhu Yi's fix attempt were reverted due to
     discovery of regressions. -- JWL)

Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 161 insertions, 36 deletions

diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c
index b7408370cf82..a9bc8a97c4e1 100644
--- a/drivers/net/wireless/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/ipw2x00/ipw2100.c
@@ -6029,7 +6029,7 @@ static struct net_device *ipw2100_alloc_device(struct pci_dev *pci_dev,
         struct ipw2100_priv *priv;
         struct net_device *dev;
 
-        dev = alloc_ieee80211(sizeof(struct ipw2100_priv));
+        dev = alloc_ieee80211(sizeof(struct ipw2100_priv), 0);
         if (!dev)
                 return NULL;
         priv = libipw_priv(dev);
@@ -6342,7 +6342,7 @@ static int ipw2100_pci_init_one(struct pci_dev *pci_dev,
                 sysfs_remove_group(&pci_dev->dev.kobj,
                                    &ipw2100_attribute_group);
 
-                free_ieee80211(dev);
+                free_ieee80211(dev, 0);
                 pci_set_drvdata(pci_dev, NULL);
         }
 
@@ -6400,7 +6400,7 @@ static void __devexit ipw2100_pci_remove_one(struct pci_dev *pci_dev)
                 if (dev->base_addr)
                         iounmap((void __iomem *)dev->base_addr);
 
-                free_ieee80211(dev);
+                free_ieee80211(dev, 0);
         }
 
         pci_release_regions(pci_dev);
diff --git a/drivers/net/wireless/ipw2x00/ipw2200.c b/drivers/net/wireless/ipw2x00/ipw2200.c
index 9b398db2d740..2dfe78acda97 100644
--- a/drivers/net/wireless/ipw2x00/ipw2200.c
+++ b/drivers/net/wireless/ipw2x00/ipw2200.c
@@ -108,6 +108,25 @@ static int antenna = CFG_SYS_ANTENNA_BOTH;
 static int rtap_iface = 0;     /* def: 0 -- do not create rtap interface */
 #endif
 
+static struct ieee80211_rate ipw2200_rates[] = {
+        { .bitrate = 10 },
+        { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+        { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+        { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
+        { .bitrate = 60 },
+        { .bitrate = 90 },
+        { .bitrate = 120 },
+        { .bitrate = 180 },
+        { .bitrate = 240 },
+        { .bitrate = 360 },
+        { .bitrate = 480 },
+        { .bitrate = 540 }
+};
+
+#define ipw2200_a_rates         (ipw2200_rates + 4)
+#define ipw2200_num_a_rates     8
+#define ipw2200_bg_rates        (ipw2200_rates + 0)
+#define ipw2200_num_bg_rates    12
 
 #ifdef CONFIG_IPW2200_QOS
 static int qos_enable = 0;
@@ -8659,24 +8678,6 @@ static int ipw_sw_reset(struct ipw_priv *priv, int option)
  *
  */
 
-static int ipw_wx_get_name(struct net_device *dev,
-                           struct iw_request_info *info,
-                           union iwreq_data *wrqu, char *extra)
-{
-        struct ipw_priv *priv = libipw_priv(dev);
-        mutex_lock(&priv->mutex);
-        if (priv->status & STATUS_RF_KILL_MASK)
-                strcpy(wrqu->name, "radio off");
-        else if (!(priv->status & STATUS_ASSOCIATED))
-                strcpy(wrqu->name, "unassociated");
-        else
-                snprintf(wrqu->name, IFNAMSIZ, "IEEE 802.11%c",
-                         ipw_modes[priv->assoc_request.ieee_mode]);
-        IPW_DEBUG_WX("Name: %s\n", wrqu->name);
-        mutex_unlock(&priv->mutex);
-        return 0;
-}
-
 static int ipw_set_channel(struct ipw_priv *priv, u8 channel)
 {
         if (channel == 0) {
@@ -9976,7 +9977,7 @@ static int ipw_wx_sw_reset(struct net_device *dev,
 /* Rebase the WE IOCTLs to zero for the handler array */
 #define IW_IOCTL(x) [(x)-SIOCSIWCOMMIT]
 static iw_handler ipw_wx_handlers[] = {
-        IW_IOCTL(SIOCGIWNAME) = ipw_wx_get_name,
+        IW_IOCTL(SIOCGIWNAME) = (iw_handler) cfg80211_wext_giwname,
         IW_IOCTL(SIOCSIWFREQ) = ipw_wx_set_freq,
         IW_IOCTL(SIOCGIWFREQ) = ipw_wx_get_freq,
         IW_IOCTL(SIOCSIWMODE) = ipw_wx_set_mode,
@@ -11421,16 +11422,100 @@ static void ipw_bg_down(struct work_struct *work)
 /* Called by register_netdev() */
 static int ipw_net_init(struct net_device *dev)
 {
+        int i, rc = 0;
         struct ipw_priv *priv = libipw_priv(dev);
+        const struct libipw_geo *geo = libipw_get_geo(priv->ieee);
+        struct wireless_dev *wdev = &priv->ieee->wdev;
         mutex_lock(&priv->mutex);
 
         if (ipw_up(priv)) {
-                mutex_unlock(&priv->mutex);
-                return -EIO;
+                rc = -EIO;
+                goto out;
         }
 
+        memcpy(wdev->wiphy->perm_addr, priv->mac_addr, ETH_ALEN);
+
+        /* fill-out priv->ieee->bg_band */
+        if (geo->bg_channels) {
+                struct ieee80211_supported_band *bg_band = &priv->ieee->bg_band;
+
+                bg_band->band = IEEE80211_BAND_2GHZ;
+                bg_band->n_channels = geo->bg_channels;
+                bg_band->channels =
+                        kzalloc(geo->bg_channels *
+                                sizeof(struct ieee80211_channel), GFP_KERNEL);
+                /* translate geo->bg to bg_band.channels */
+                for (i = 0; i < geo->bg_channels; i++) {
+                        bg_band->channels[i].band = IEEE80211_BAND_2GHZ;
+                        bg_band->channels[i].center_freq = geo->bg[i].freq;
+                        bg_band->channels[i].hw_value = geo->bg[i].channel;
+                        bg_band->channels[i].max_power = geo->bg[i].max_power;
+                        if (geo->bg[i].flags & LIBIPW_CH_PASSIVE_ONLY)
+                                bg_band->channels[i].flags |=
+                                        IEEE80211_CHAN_PASSIVE_SCAN;
+                        if (geo->bg[i].flags & LIBIPW_CH_NO_IBSS)
+                                bg_band->channels[i].flags |=
+                                        IEEE80211_CHAN_NO_IBSS;
+                        if (geo->bg[i].flags & LIBIPW_CH_RADAR_DETECT)
+                                bg_band->channels[i].flags |=
+                                        IEEE80211_CHAN_RADAR;
+                        /* No equivalent for LIBIPW_CH_80211H_RULES,
+                           LIBIPW_CH_UNIFORM_SPREADING, or
+                           LIBIPW_CH_B_ONLY... */
+                }
+                /* point at bitrate info */
+                bg_band->bitrates = ipw2200_bg_rates;
+                bg_band->n_bitrates = ipw2200_num_bg_rates;
+
+                wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = bg_band;
+        }
+
+        /* fill-out priv->ieee->a_band */
+        if (geo->a_channels) {
+                struct ieee80211_supported_band *a_band = &priv->ieee->a_band;
+
+                a_band->band = IEEE80211_BAND_5GHZ;
+                a_band->n_channels = geo->a_channels;
+                a_band->channels =
+                        kzalloc(geo->a_channels *
+                                sizeof(struct ieee80211_channel), GFP_KERNEL);
+                /* translate geo->bg to a_band.channels */
+                for (i = 0; i < geo->a_channels; i++) {
+                        a_band->channels[i].band = IEEE80211_BAND_2GHZ;
+                        a_band->channels[i].center_freq = geo->a[i].freq;
+                        a_band->channels[i].hw_value = geo->a[i].channel;
+                        a_band->channels[i].max_power = geo->a[i].max_power;
+                        if (geo->a[i].flags & LIBIPW_CH_PASSIVE_ONLY)
+                                a_band->channels[i].flags |=
+                                        IEEE80211_CHAN_PASSIVE_SCAN;
+                        if (geo->a[i].flags & LIBIPW_CH_NO_IBSS)
+                                a_band->channels[i].flags |=
+                                        IEEE80211_CHAN_NO_IBSS;
+                        if (geo->a[i].flags & LIBIPW_CH_RADAR_DETECT)
+                                a_band->channels[i].flags |=
+                                        IEEE80211_CHAN_RADAR;
+                        /* No equivalent for LIBIPW_CH_80211H_RULES,
+                           LIBIPW_CH_UNIFORM_SPREADING, or
+                           LIBIPW_CH_B_ONLY... */
+                }
+                /* point at bitrate info */
+                a_band->bitrates = ipw2200_a_rates;
+                a_band->n_bitrates = ipw2200_num_a_rates;
+
+                wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = a_band;
+        }
+
+        set_wiphy_dev(wdev->wiphy, &priv->pci_dev->dev);
+
+        /* With that information in place, we can now register the wiphy... */
+        if (wiphy_register(wdev->wiphy)) {
+                rc = -EIO;
+                goto out;
+        }
+
+out:
         mutex_unlock(&priv->mutex);
-        return 0;
+        return rc;
 }
 
 /* PCI driver stuff */
@@ -11561,7 +11646,7 @@ static int ipw_prom_alloc(struct ipw_priv *priv)
         if (priv->prom_net_dev)
                 return -EPERM;
 
-        priv->prom_net_dev = alloc_ieee80211(sizeof(struct ipw_prom_priv));
+        priv->prom_net_dev = alloc_ieee80211(sizeof(struct ipw_prom_priv), 1);
         if (priv->prom_net_dev == NULL)
                 return -ENOMEM;
 
@@ -11580,7 +11665,7 @@ static int ipw_prom_alloc(struct ipw_priv *priv)
 
         rc = register_netdev(priv->prom_net_dev);
         if (rc) {
-                free_ieee80211(priv->prom_net_dev);
+                free_ieee80211(priv->prom_net_dev, 1);
                 priv->prom_net_dev = NULL;
                 return rc;
         }
@@ -11594,7 +11679,7 @@ static void ipw_prom_free(struct ipw_priv *priv)
                 return;
 
         unregister_netdev(priv->prom_net_dev);
-        free_ieee80211(priv->prom_net_dev);
+        free_ieee80211(priv->prom_net_dev, 1);
 
         priv->prom_net_dev = NULL;
 }
@@ -11622,7 +11707,7 @@ static int __devinit ipw_pci_probe(struct pci_dev *pdev,
         struct ipw_priv *priv;
         int i;
 
-        net_dev = alloc_ieee80211(sizeof(struct ipw_priv));
+        net_dev = alloc_ieee80211(sizeof(struct ipw_priv), 0);
         if (net_dev == NULL) {
                 err = -ENOMEM;
                 goto out;
@@ -11770,7 +11855,7 @@ static int __devinit ipw_pci_probe(struct pci_dev *pdev,
         pci_disable_device(pdev);
         pci_set_drvdata(pdev, NULL);
       out_free_ieee80211:
-        free_ieee80211(priv->net_dev);
+        free_ieee80211(priv->net_dev, 0);
       out:
         return err;
 }
@@ -11837,7 +11922,11 @@ static void __devexit ipw_pci_remove(struct pci_dev *pdev)
         pci_release_regions(pdev);
         pci_disable_device(pdev);
         pci_set_drvdata(pdev, NULL);
-        free_ieee80211(priv->net_dev);
+        /* wiphy_unregister needs to be here, before free_ieee80211 */
+        wiphy_unregister(priv->ieee->wdev.wiphy);
+        kfree(priv->ieee->a_band.channels);
+        kfree(priv->ieee->bg_band.channels);
+        free_ieee80211(priv->net_dev, 0);
         free_firmware();
 }
 
diff --git a/drivers/net/wireless/ipw2x00/libipw.h b/drivers/net/wireless/ipw2x00/libipw.h
index 1e334ff6bd52..bf45391172f3 100644
--- a/drivers/net/wireless/ipw2x00/libipw.h
+++ b/drivers/net/wireless/ipw2x00/libipw.h
@@ -31,6 +31,7 @@
 #include <linux/ieee80211.h>
 
 #include <net/lib80211.h>
+#include <net/cfg80211.h>
 
 #define LIBIPW_VERSION "git-1.1.13"
 
@@ -783,12 +784,15 @@ struct libipw_geo {
 
 struct libipw_device {
         struct net_device *dev;
+        struct wireless_dev wdev;
         struct libipw_security sec;
 
         /* Bookkeeping structures */
         struct libipw_stats ieee_stats;
 
         struct libipw_geo geo;
+        struct ieee80211_supported_band bg_band;
+        struct ieee80211_supported_band a_band;
 
         /* Probe / Beacon management */
         struct list_head network_free_list;
@@ -1014,8 +1018,8 @@ static inline int libipw_is_cck_rate(u8 rate)
 }
 
 /* ieee80211.c */
-extern void free_ieee80211(struct net_device *dev);
-extern struct net_device *alloc_ieee80211(int sizeof_priv);
+extern void free_ieee80211(struct net_device *dev, int monitor);
+extern struct net_device *alloc_ieee80211(int sizeof_priv, int monitor);
 extern int libipw_change_mtu(struct net_device *dev, int new_mtu);
 
 extern void libipw_networks_age(struct libipw_device *ieee,
diff --git a/drivers/net/wireless/ipw2x00/libipw_module.c b/drivers/net/wireless/ipw2x00/libipw_module.c
index eb2b60834c17..e8a1ac5f8e11 100644
--- a/drivers/net/wireless/ipw2x00/libipw_module.c
+++ b/drivers/net/wireless/ipw2x00/libipw_module.c
@@ -62,6 +62,9 @@ MODULE_DESCRIPTION(DRV_DESCRIPTION);
 MODULE_AUTHOR(DRV_COPYRIGHT);
 MODULE_LICENSE("GPL");
 
+struct cfg80211_ops libipw_config_ops = { };
+void *libipw_wiphy_privid = &libipw_wiphy_privid;
+
 static int libipw_networks_allocate(struct libipw_device *ieee)
 {
         if (ieee->networks)
@@ -140,7 +143,7 @@ int libipw_change_mtu(struct net_device *dev, int new_mtu)
 }
 EXPORT_SYMBOL(libipw_change_mtu);
 
-struct net_device *alloc_ieee80211(int sizeof_priv)
+struct net_device *alloc_ieee80211(int sizeof_priv, int monitor)
 {
         struct libipw_device *ieee;
         struct net_device *dev;
@@ -157,10 +160,31 @@ struct net_device *alloc_ieee80211(int sizeof_priv)
 
         ieee->dev = dev;
 
+        if (!monitor) {
+                ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0);
+                if (!ieee->wdev.wiphy) {
+                        LIBIPW_ERROR("Unable to allocate wiphy.\n");
+                        goto failed_free_netdev;
+                }
+
+                ieee->dev->ieee80211_ptr = &ieee->wdev;
+                ieee->wdev.iftype = NL80211_IFTYPE_STATION;
+
+                /* Fill-out wiphy structure bits we know...  Not enough info
+                   here to call set_wiphy_dev or set MAC address or channel info
+                   -- have to do that in ->ndo_init... */
+                ieee->wdev.wiphy->privid = libipw_wiphy_privid;
+
+                ieee->wdev.wiphy->max_scan_ssids = 1;
+                ieee->wdev.wiphy->max_scan_ie_len = 0;
+                ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
+                                                | BIT(NL80211_IFTYPE_ADHOC);
+        }
+
         err = libipw_networks_allocate(ieee);
         if (err) {
                 LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err);
-                goto failed_free_netdev;
+                goto failed_free_wiphy;
         }
         libipw_networks_initialize(ieee);
 
@@ -193,19 +217,27 @@ struct net_device *alloc_ieee80211(int sizeof_priv)
 
         return dev;
 
+failed_free_wiphy:
+        if (!monitor)
+                wiphy_free(ieee->wdev.wiphy);
 failed_free_netdev:
         free_netdev(dev);
 failed:
         return NULL;
 }
 
-void free_ieee80211(struct net_device *dev)
+void free_ieee80211(struct net_device *dev, int monitor)
 {
         struct libipw_device *ieee = netdev_priv(dev);
 
         lib80211_crypt_info_free(&ieee->crypt_info);
 
         libipw_networks_free(ieee);
+
+        /* free cfg80211 resources */
+        if (!monitor)
+                wiphy_free(ieee->wdev.wiphy);
+
         free_netdev(dev);
 }