PS3: gelic: Add support for ESSID scan

This adds the support for ESSID scanning

Signed-off-by: Masakazu Mokuno <mokuno@sm.sony.co.jp>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 58 insertions, 7 deletions

diff --git a/drivers/net/ps3_gelic_wireless.c b/drivers/net/ps3_gelic_wireless.c
index f5e5f13eaf43..aa963ac1e37b 100644
--- a/drivers/net/ps3_gelic_wireless.c
+++ b/drivers/net/ps3_gelic_wireless.c
@@ -45,7 +45,8 @@
 #include "ps3_gelic_wireless.h"
 
 
-static int gelic_wl_start_scan(struct gelic_wl_info *wl, int always_scan);
+static int gelic_wl_start_scan(struct gelic_wl_info *wl, int always_scan,
+                               u8 *essid, size_t essid_len);
 static int gelic_wl_try_associate(struct net_device *netdev);
 
 /*
@@ -105,6 +106,7 @@ static const struct eurus_cmd_arg_info cmd_info[GELIC_EURUS_CMD_MAX_INDEX] = {
         [GELIC_EURUS_CMD_GET_WEP_CFG]    = { .post_arg = 1},
         [GELIC_EURUS_CMD_GET_WPA_CFG]    = { .post_arg = 1},
         [GELIC_EURUS_CMD_GET_RSSI_CFG]   = { .post_arg = 1},
+        [GELIC_EURUS_CMD_START_SCAN]     = { .pre_arg = 1},
         [GELIC_EURUS_CMD_GET_SCAN]       = { .post_arg = 1},
 };
 
@@ -163,7 +165,9 @@ static void gelic_eurus_sync_cmd_worker(struct work_struct *work)
         card = port_to_card(wl_port(wl));
 
         if (cmd_info[cmd->cmd].pre_arg) {
-                arg1 = ps3_mm_phys_to_lpar(__pa(cmd->buffer));
+                arg1 = (cmd->buffer) ?
+                        ps3_mm_phys_to_lpar(__pa(cmd->buffer)) :
+                        0;
                 arg2 = cmd->buf_size;
         } else {
                 arg1 = 0;
@@ -360,6 +364,9 @@ static int gelic_wl_get_range(struct net_device *netdev,
         range->num_encoding_sizes = 3;
         range->max_encoding_tokens = GELIC_WEP_KEYS;
 
+        /* scan capability */
+        range->scan_capa = IW_SCAN_CAPA_ESSID;
+
         pr_debug("%s: ->\n", __func__);
         return 0;
 
@@ -371,8 +378,18 @@ static int gelic_wl_set_scan(struct net_device *netdev,
                            union iwreq_data *wrqu, char *extra)
 {
         struct gelic_wl_info *wl = port_wl(netdev_priv(netdev));
-
-        return gelic_wl_start_scan(wl, 1);
+        struct iw_scan_req *req;
+        u8 *essid = NULL;
+        size_t essid_len = 0;
+
+        if (wrqu->data.length == sizeof(struct iw_scan_req) &&
+            wrqu->data.flags & IW_SCAN_THIS_ESSID) {
+                req = (struct iw_scan_req*)extra;
+                essid = req->essid;
+                essid_len = req->essid_len;
+                pr_debug("%s: ESSID scan =%s\n", __func__, essid);
+        }
+        return gelic_wl_start_scan(wl, 1, essid, essid_len);
 }
 
 #define OUI_LEN 3
@@ -1534,10 +1551,13 @@ static struct iw_statistics *gelic_wl_get_wireless_stats(
 /*
  *  scanning helpers
  */
-static int gelic_wl_start_scan(struct gelic_wl_info *wl, int always_scan)
+static int gelic_wl_start_scan(struct gelic_wl_info *wl, int always_scan,
+                               u8 *essid, size_t essid_len)
 {
         struct gelic_eurus_cmd *cmd;
         int ret = 0;
+        void *buf = NULL;
+        size_t len;
 
         pr_debug("%s: <- always=%d\n", __func__, always_scan);
         if (mutex_lock_interruptible(&wl->scan_lock))
@@ -1560,12 +1580,27 @@ static int gelic_wl_start_scan(struct gelic_wl_info *wl, int always_scan)
                 complete(&wl->scan_done);
                 goto out;
         }
+
+        /* ESSID scan ? */
+        if (essid_len && essid) {
+                buf = (void *)__get_free_page(GFP_KERNEL);
+                if (!buf) {
+                        ret = -ENOMEM;
+                        goto out;
+                }
+                len = IW_ESSID_MAX_SIZE; /* hypervisor always requires 32 */
+                memset(buf, 0, len);
+                memcpy(buf, essid, essid_len);
+                pr_debug("%s: essid scan='%s'\n", __func__, (char *)buf);
+        } else
+                len = 0;
+
         /*
          * issue start scan request
          */
         wl->scan_stat = GELIC_WL_SCAN_STAT_SCANNING;
         cmd = gelic_eurus_sync_cmd(wl, GELIC_EURUS_CMD_START_SCAN,
-                                   NULL, 0);
+                                   buf, len);
         if (!cmd || cmd->status || cmd->cmd_status) {
                 wl->scan_stat = GELIC_WL_SCAN_STAT_INIT;
                 complete(&wl->scan_done);
@@ -1574,6 +1609,7 @@ static int gelic_wl_start_scan(struct gelic_wl_info *wl, int always_scan)
         }
         kfree(cmd);
 out:
+        free_page((unsigned long)buf);
         mutex_unlock(&wl->scan_lock);
         pr_debug("%s: ->\n", __func__);
         return ret;
@@ -2261,6 +2297,9 @@ static void gelic_wl_assoc_worker(struct work_struct *work)
 
         struct gelic_wl_scan_info *best_bss;
         int ret;
+        unsigned long irqflag;
+        u8 *essid;
+        size_t essid_len;
 
         wl = container_of(work, struct gelic_wl_info, assoc_work.work);
 
@@ -2269,7 +2308,19 @@ static void gelic_wl_assoc_worker(struct work_struct *work)
         if (wl->assoc_stat != GELIC_WL_ASSOC_STAT_DISCONN)
                 goto out;
 
-        ret = gelic_wl_start_scan(wl, 0);
+        spin_lock_irqsave(&wl->lock, irqflag);
+        if (test_bit(GELIC_WL_STAT_ESSID_SET, &wl->stat)) {
+                pr_debug("%s: assoc ESSID configured %s\n", __func__,
+                         wl->essid);
+                essid = wl->essid;
+                essid_len = wl->essid_len;
+        } else {
+                essid = NULL;
+                essid_len = 0;
+        }
+        spin_unlock_irqrestore(&wl->lock, irqflag);
+
+        ret = gelic_wl_start_scan(wl, 0, essid, essid_len);
         if (ret == -ERESTARTSYS) {
                 pr_debug("%s: scan start failed association\n", __func__);
                 schedule_delayed_work(&wl->assoc_work, HZ/10); /*FIXME*/