wlcore/wl12xx/wl18xx: handle spare blocks spacial cases per arch

Add a HW op for getting spare blocks.

12xx cards require 2 spare blocks for GEM encrypted SKBs, regardless
of VIFs or keys programmed into the FW.

18xx cards require 2 spare blocks when there are any connected TKIP or
GEM VIFs. For now always return 2 spare blocks, as this works with all
networks. The special case TKIP/GEM functionality is added at a later
patch.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

9 files changed, 39 insertions, 35 deletions

diff --git a/drivers/net/wireless/ti/wl12xx/main.c b/drivers/net/wireless/ti/wl12xx/main.c
index d33117efec79..03ff1ce56bb4 100644
--- a/drivers/net/wireless/ti/wl12xx/main.c
+++ b/drivers/net/wireless/ti/wl12xx/main.c
@@ -1361,6 +1361,14 @@ out:
         return ret;
 }
 
+static int wl12xx_get_spare_blocks(struct wl1271 *wl, bool is_gem)
+{
+        if (is_gem)
+                return WL12XX_TX_HW_BLOCK_GEM_SPARE;
+
+        return WL12XX_TX_HW_BLOCK_SPARE_DEFAULT;
+}
+
 static struct wlcore_ops wl12xx_ops = {
         .identify_chip          = wl12xx_identify_chip,
         .identify_fw            = wl12xx_identify_fw,
@@ -1384,6 +1392,7 @@ static struct wlcore_ops wl12xx_ops = {
         .set_rx_csum            = NULL,
         .ap_get_mimo_wide_rate_mask = NULL,
         .debugfs_init           = wl12xx_debugfs_add_files,
+        .get_spare_blocks       = wl12xx_get_spare_blocks,
 };
 
 static struct ieee80211_sta_ht_cap wl12xx_ht_cap = {
@@ -1419,8 +1428,6 @@ static int __devinit wl12xx_probe(struct platform_device *pdev)
         wl->rtable = wl12xx_rtable;
         wl->num_tx_desc = 16;
         wl->num_rx_desc = 8;
-        wl->normal_tx_spare = WL12XX_TX_HW_BLOCK_SPARE_DEFAULT;
-        wl->gem_tx_spare = WL12XX_TX_HW_BLOCK_GEM_SPARE;
         wl->band_rate_to_idx = wl12xx_band_rate_to_idx;
         wl->hw_tx_rate_tbl_size = WL12XX_CONF_HW_RXTX_RATE_MAX;
         wl->hw_min_ht_rate = WL12XX_CONF_HW_RXTX_RATE_MCS0;
diff --git a/drivers/net/wireless/ti/wl18xx/main.c b/drivers/net/wireless/ti/wl18xx/main.c
index d67be3eae3d9..c651f872d7d5 100644
--- a/drivers/net/wireless/ti/wl18xx/main.c
+++ b/drivers/net/wireless/ti/wl18xx/main.c
@@ -874,7 +874,7 @@ static int wl18xx_hw_init(struct wl1271 *wl)
 
         ret = wl18xx_acx_host_if_cfg_bitmap(wl, host_cfg_bitmap,
                                             sdio_align_size,
-                                            WL18XX_TX_HW_BLOCK_SPARE,
+                                            WL18XX_TX_HW_EXTRA_BLOCK_SPARE,
                                             WL18XX_HOST_IF_LEN_SIZE_FIELD);
         if (ret < 0)
                 return ret;
@@ -1034,6 +1034,12 @@ static int wl18xx_handle_static_data(struct wl1271 *wl,
         return 0;
 }
 
+static int wl18xx_get_spare_blocks(struct wl1271 *wl, bool is_gem)
+{
+        /* TODO: dynamically change to extra only when we have GEM or TKIP */
+        return WL18XX_TX_HW_EXTRA_BLOCK_SPARE;
+}
+
 static struct wlcore_ops wl18xx_ops = {
         .identify_chip  = wl18xx_identify_chip,
         .boot           = wl18xx_boot,
@@ -1056,6 +1062,7 @@ static struct wlcore_ops wl18xx_ops = {
         .get_mac        = wl18xx_get_mac,
         .debugfs_init   = wl18xx_debugfs_add_files,
         .handle_static_data     = wl18xx_handle_static_data,
+        .get_spare_blocks = wl18xx_get_spare_blocks,
 };
 
 /* HT cap appropriate for wide channels */
@@ -1129,8 +1136,6 @@ static int __devinit wl18xx_probe(struct platform_device *pdev)
         wl->rtable = wl18xx_rtable;
         wl->num_tx_desc = 32;
         wl->num_rx_desc = 16;
-        wl->normal_tx_spare = WL18XX_TX_HW_BLOCK_SPARE;
-        wl->gem_tx_spare = WL18XX_TX_HW_GEM_BLOCK_SPARE;
         wl->band_rate_to_idx = wl18xx_band_rate_to_idx;
         wl->hw_tx_rate_tbl_size = WL18XX_CONF_HW_RXTX_RATE_MAX;
         wl->hw_min_ht_rate = WL18XX_CONF_HW_RXTX_RATE_MCS0;
diff --git a/drivers/net/wireless/ti/wl18xx/tx.h b/drivers/net/wireless/ti/wl18xx/tx.h
index 2417262de207..8aecaf09da9c 100644
--- a/drivers/net/wireless/ti/wl18xx/tx.h
+++ b/drivers/net/wireless/ti/wl18xx/tx.h
@@ -25,7 +25,8 @@
 #include "../wlcore/wlcore.h"
 
 #define WL18XX_TX_HW_BLOCK_SPARE        1
-#define WL18XX_TX_HW_GEM_BLOCK_SPARE    2
+/* for special cases - namely, TKIP and GEM */
+#define WL18XX_TX_HW_EXTRA_BLOCK_SPARE  2
 #define WL18XX_TX_HW_BLOCK_SIZE         268
 
 #define WL18XX_TX_STATUS_DESC_ID_MASK    0x7F
diff --git a/drivers/net/wireless/ti/wlcore/debugfs.c b/drivers/net/wireless/ti/wlcore/debugfs.c
index fc44262e4cf0..fcd60636e9d1 100644
--- a/drivers/net/wireless/ti/wlcore/debugfs.c
+++ b/drivers/net/wireless/ti/wlcore/debugfs.c
@@ -507,7 +507,6 @@ static ssize_t vifs_state_read(struct file *file, char __user *user_buf,
                 VIF_STATE_PRINT_INT(last_rssi_event);
                 VIF_STATE_PRINT_INT(ba_support);
                 VIF_STATE_PRINT_INT(ba_allowed);
-                VIF_STATE_PRINT_INT(is_gem);
                 VIF_STATE_PRINT_LLHEX(tx_security_seq);
                 VIF_STATE_PRINT_INT(tx_security_last_seq_lsb);
         }
diff --git a/drivers/net/wireless/ti/wlcore/hw_ops.h b/drivers/net/wireless/ti/wlcore/hw_ops.h
index c590b6f529d1..2cb35218ba47 100644
--- a/drivers/net/wireless/ti/wlcore/hw_ops.h
+++ b/drivers/net/wireless/ti/wlcore/hw_ops.h
@@ -167,4 +167,13 @@ wlcore_handle_static_data(struct wl1271 *wl, void *static_data)
         return 0;
 }
 
+static inline int
+wlcore_hw_get_spare_blocks(struct wl1271 *wl, bool is_gem)
+{
+        if (!wl->ops->get_spare_blocks)
+                BUG_ON(1);
+
+        return wl->ops->get_spare_blocks(wl, is_gem);
+}
+
 #endif
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index 5ac062831666..0f25d4eea037 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -2799,17 +2799,6 @@ static int wl1271_set_key(struct wl1271 *wl, struct wl12xx_vif *wlvif,
         int ret;
         bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
 
-        /*
-         * A role set to GEM cipher requires different Tx settings (namely
-         * spare blocks). Note when we are in this mode so the HW can adjust.
-         */
-        if (key_type == KEY_GEM) {
-                if (action == KEY_ADD_OR_REPLACE)
-                        wlvif->is_gem = true;
-                else if (action == KEY_REMOVE)
-                        wlvif->is_gem = false;
-        }
-
         if (is_ap) {
                 struct wl1271_station *wl_sta;
                 u8 hlid;
diff --git a/drivers/net/wireless/ti/wlcore/tx.c b/drivers/net/wireless/ti/wlcore/tx.c
index 6b68e29a1e92..0949ab1f5972 100644
--- a/drivers/net/wireless/ti/wlcore/tx.c
+++ b/drivers/net/wireless/ti/wlcore/tx.c
@@ -187,28 +187,24 @@ EXPORT_SYMBOL(wlcore_calc_packet_alignment);
 
 static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
                               struct sk_buff *skb, u32 extra, u32 buf_offset,
-                              u8 hlid)
+                              u8 hlid, bool is_gem)
 {
         struct wl1271_tx_hw_descr *desc;
         u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
         u32 total_blocks;
         int id, ret = -EBUSY, ac;
-        u32 spare_blocks = wl->normal_tx_spare;
-        bool is_dummy = false;
+        u32 spare_blocks;
 
         if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE)
                 return -EAGAIN;
 
+        spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem);
+
         /* allocate free identifier for the packet */
         id = wl1271_alloc_tx_id(wl, skb);
         if (id < 0)
                 return id;
 
-        if (unlikely(wl12xx_is_dummy_packet(wl, skb)))
-                is_dummy = true;
-        else if (wlvif->is_gem)
-                spare_blocks = wl->gem_tx_spare;
-
         total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks);
 
         if (total_blocks <= wl->tx_blocks_available) {
@@ -230,7 +226,7 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
                 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
                 wl->tx_allocated_pkts[ac]++;
 
-                if (!is_dummy && wlvif &&
+                if (!wl12xx_is_dummy_packet(wl, skb) && wlvif &&
                     wlvif->bss_type == BSS_TYPE_AP_BSS &&
                     test_bit(hlid, wlvif->ap.sta_hlid_map))
                         wl->links[hlid].allocated_pkts++;
@@ -349,6 +345,7 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
         u32 total_len;
         u8 hlid;
         bool is_dummy;
+        bool is_gem = false;
 
         if (!skb)
                 return -EINVAL;
@@ -377,6 +374,8 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
                                 return ret;
                         wlvif->default_key = idx;
                 }
+
+                is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
         }
         hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
         if (hlid == WL12XX_INVALID_LINK_ID) {
@@ -384,7 +383,8 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct wl12xx_vif *wlvif,
                 return -EINVAL;
         }
 
-        ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid);
+        ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
+                                 is_gem);
         if (ret < 0)
                 return ret;
 
diff --git a/drivers/net/wireless/ti/wlcore/wlcore.h b/drivers/net/wireless/ti/wlcore/wlcore.h
index 16c28bbd1b20..5274ace6c8e4 100644
--- a/drivers/net/wireless/ti/wlcore/wlcore.h
+++ b/drivers/net/wireless/ti/wlcore/wlcore.h
@@ -75,6 +75,7 @@ struct wlcore_ops {
         int (*debugfs_init)(struct wl1271 *wl, struct dentry *rootdir);
         int (*handle_static_data)(struct wl1271 *wl,
                                   struct wl1271_static_data *static_data);
+        int (*get_spare_blocks)(struct wl1271 *wl, bool is_gem);
 };
 
 enum wlcore_partitions {
@@ -354,10 +355,6 @@ struct wl1271 {
         /* number of RX descriptors the HW supports. */
         u32 num_rx_desc;
 
-        /* spare Tx blocks for normal/GEM operating modes */
-        u32 normal_tx_spare;
-        u32 gem_tx_spare;
-
         /* translate HW Tx rates to standard rate-indices */
         const u8 **band_rate_to_idx;
 
diff --git a/drivers/net/wireless/ti/wlcore/wlcore_i.h b/drivers/net/wireless/ti/wlcore/wlcore_i.h
index 83c9869105c3..8260b1e9288a 100644
--- a/drivers/net/wireless/ti/wlcore/wlcore_i.h
+++ b/drivers/net/wireless/ti/wlcore/wlcore_i.h
@@ -417,9 +417,6 @@ struct wl12xx_vif {
         struct work_struct rx_streaming_disable_work;
         struct timer_list rx_streaming_timer;
 
-        /* does the current role use GEM for encryption (AP or STA) */
-        bool is_gem;
-
         /*
          * This struct must be last!
          * data that has to be saved acrossed reconfigs (e.g. recovery)