iwl3945: rearrange 3945 tfd

This patch moves 3945 TFD structures to iwl-3945-fh.h. It renames them
similarly to AGN naming. This patch also eliminates iwl3945_tx_info and
fixes endianity issue in iwl3945_tx_skb and iwl3945_enqueue_hcmd caused
by ugly casting.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

6 files changed, 46 insertions, 57 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-fh.h b/drivers/net/wireless/iwlwifi/iwl-3945-fh.h
index bbcd0cefc724..53ed24942a07 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-fh.h
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-fh.h
@@ -172,7 +172,17 @@
 
 #define FH39_RSSR_CHNL0_RX_STATUS_CHNL_IDLE                     (0x01000000)
 
-#define TFD_QUEUE_SIZE_MAX      (256)
+struct iwl3945_tfd_tb {
+        __le32 addr;
+        __le32 len;
+} __attribute__ ((packed));
+
+struct iwl3945_tfd {
+        __le32 control_flags;
+        struct iwl3945_tfd_tb tbs[4];
+        u8 __pad[28];
+} __attribute__ ((packed));
+
 
 #endif /* __iwl_3945_fh_h__ */
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-hw.h b/drivers/net/wireless/iwlwifi/iwl-3945-hw.h
index fc1b774c806b..1ba59dfacd1b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-hw.h
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-hw.h
@@ -304,17 +304,6 @@ struct iwl3945_shared {
         __le32 tx_base_ptr[8];
 } __attribute__ ((packed));
 
-struct iwl3945_tfd_frame_data {
-        __le32 addr;
-        __le32 len;
-} __attribute__ ((packed));
-
-struct iwl3945_tfd_frame {
-        __le32 control_flags;
-        struct iwl3945_tfd_frame_data pa[4];
-        u8 reserved[28];
-} __attribute__ ((packed));
-
 static inline u8 iwl3945_hw_get_rate(__le16 rate_n_flags)
 {
         return le16_to_cpu(rate_n_flags) & 0xFF;
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index cb864449c397..6810909f3fef 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -38,6 +38,7 @@
 #include <asm/unaligned.h>
 #include <net/mac80211.h>
 
+#include "iwl-fh.h"
 #include "iwl-3945-fh.h"
 #include "iwl-commands.h"
 #include "iwl-3945.h"
@@ -307,7 +308,7 @@ static void iwl3945_tx_queue_reclaim(struct iwl_priv *priv,
 {
         struct iwl3945_tx_queue *txq = &priv->txq39[txq_id];
         struct iwl_queue *q = &txq->q;
-        struct iwl3945_tx_info *tx_info;
+        struct iwl_tx_info *tx_info;
 
         BUG_ON(txq_id == IWL_CMD_QUEUE_NUM);
 
@@ -728,7 +729,7 @@ int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
 {
         int count;
         u32 pad;
-        struct iwl3945_tfd_frame *tfd = (struct iwl3945_tfd_frame *)ptr;
+        struct iwl3945_tfd *tfd = (struct iwl3945_tfd *)ptr;
 
         count = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
         pad = TFD_CTL_PAD_GET(le32_to_cpu(tfd->control_flags));
@@ -739,8 +740,8 @@ int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
                 return -EINVAL;
         }
 
-        tfd->pa[count].addr = cpu_to_le32(addr);
-        tfd->pa[count].len = cpu_to_le32(len);
+        tfd->tbs[count].addr = cpu_to_le32(addr);
+        tfd->tbs[count].len = cpu_to_le32(len);
 
         count++;
 
@@ -757,8 +758,8 @@ int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
  */
 int iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
 {
-        struct iwl3945_tfd_frame *bd_tmp = (struct iwl3945_tfd_frame *)&txq->bd[0];
-        struct iwl3945_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
+        struct iwl3945_tfd *tfd_tmp = (struct iwl3945_tfd *)&txq->tfds[0];
+        struct iwl3945_tfd *tfd = &tfd_tmp[txq->q.read_ptr];
         struct pci_dev *dev = priv->pci_dev;
         int i;
         int counter;
@@ -769,7 +770,7 @@ int iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
                 return 0;
 
         /* sanity check */
-        counter = TFD_CTL_COUNT_GET(le32_to_cpu(bd->control_flags));
+        counter = TFD_CTL_COUNT_GET(le32_to_cpu(tfd->control_flags));
         if (counter > NUM_TFD_CHUNKS) {
                 IWL_ERR(priv, "Too many chunks: %i\n", counter);
                 /* @todo issue fatal error, it is quite serious situation */
@@ -779,8 +780,8 @@ int iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
         /* unmap chunks if any */
 
         for (i = 1; i < counter; i++) {
-                pci_unmap_single(dev, le32_to_cpu(bd->pa[i].addr),
-                                 le32_to_cpu(bd->pa[i].len), PCI_DMA_TODEVICE);
+                pci_unmap_single(dev, le32_to_cpu(tfd->tbs[i].addr),
+                         le32_to_cpu(tfd->tbs[i].len), PCI_DMA_TODEVICE);
                 if (txq->txb[txq->q.read_ptr].skb[0]) {
                         struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
                         if (txq->txb[txq->q.read_ptr].skb[0]) {
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.h b/drivers/net/wireless/iwlwifi/iwl-3945.h
index aff6a3a53898..716c4b462335 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.h
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.h
@@ -45,6 +45,7 @@ extern struct pci_device_id iwl3945_hw_card_ids[];
 
 #include "iwl-csr.h"
 #include "iwl-prph.h"
+#include "iwl-fh.h"
 #include "iwl-3945-hw.h"
 #include "iwl-debug.h"
 #include "iwl-power.h"
@@ -107,13 +108,6 @@ enum iwl3945_antenna {
 
 int iwl3945_x2_queue_used(const struct iwl_queue *q, int i);
 
-#define MAX_NUM_OF_TBS          (20)
-
-/* One for each TFD */
-struct iwl3945_tx_info {
-        struct sk_buff *skb[MAX_NUM_OF_TBS];
-};
-
 #include "iwl-agn-rs.h"
 
 #define IWL_TX_FIFO_AC0 0
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 8981c054a4cb..1ad4d084e357 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -36,14 +36,15 @@
 #include <linux/kernel.h>
 #include <net/ieee80211_radiotap.h>
 
-#include "iwl-rfkill.h"
 #include "iwl-eeprom.h"
-#include "iwl-4965-hw.h"
-#include "iwl-3945-hw.h"
-#include "iwl-3945-led.h"
 #include "iwl-csr.h"
 #include "iwl-prph.h"
+#include "iwl-fh.h"
 #include "iwl-debug.h"
+#include "iwl-rfkill.h"
+#include "iwl-4965-hw.h"
+#include "iwl-3945-hw.h"
+#include "iwl-3945-led.h"
 #include "iwl-led.h"
 #include "iwl-power.h"
 #include "iwl-agn-rs.h"
@@ -239,10 +240,10 @@ struct iwl_channel_info {
  */
 struct iwl3945_tx_queue {
         struct iwl_queue q;
-        struct iwl3945_tfd_frame *bd;
+        struct iwl3945_tfd *tfds;
         struct iwl_cmd *cmd;
         dma_addr_t dma_addr_cmd;
-        struct iwl3945_tx_info *txb;
+        struct iwl_tx_info *txb;
         int need_update;
         int active;
 };
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 207d55bea5fa..c37fa00af6d7 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -48,9 +48,10 @@
 
 #define DRV_NAME        "iwl3945"
 
+#include "iwl-fh.h"
+#include "iwl-3945-fh.h"
 #include "iwl-commands.h"
 #include "iwl-3945.h"
-#include "iwl-3945-fh.h"
 #include "iwl-helpers.h"
 #include "iwl-core.h"
 #include "iwl-dev.h"
@@ -180,13 +181,13 @@ static int iwl3945_tx_queue_alloc(struct iwl_priv *priv,
 
         /* Circular buffer of transmit frame descriptors (TFDs),
          * shared with device */
-        txq->bd = pci_alloc_consistent(dev,
-                        sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
+        txq->tfds = pci_alloc_consistent(dev,
+                        sizeof(txq->tfds[0]) * TFD_QUEUE_SIZE_MAX,
                         &txq->q.dma_addr);
 
-        if (!txq->bd) {
+        if (!txq->tfds) {
                 IWL_ERR(priv, "pci_alloc_consistent(%zd) failed\n",
-                          sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
+                          sizeof(txq->tfds[0]) * TFD_QUEUE_SIZE_MAX);
                 goto error;
         }
         txq->q.id = id;
@@ -278,8 +279,8 @@ void iwl3945_tx_queue_free(struct iwl_priv *priv, struct iwl3945_tx_queue *txq)
 
         /* De-alloc circular buffer of TFDs */
         if (txq->q.n_bd)
-                pci_free_consistent(dev, sizeof(struct iwl3945_tfd_frame) *
-                                    txq->q.n_bd, txq->bd, txq->q.dma_addr);
+                pci_free_consistent(dev, sizeof(struct iwl3945_tfd) *
+                                    txq->q.n_bd, txq->tfds, txq->q.dma_addr);
 
         /* De-alloc array of per-TFD driver data */
         kfree(txq->txb);
@@ -445,14 +446,12 @@ static int iwl3945_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 {
         struct iwl3945_tx_queue *txq = &priv->txq39[IWL_CMD_QUEUE_NUM];
         struct iwl_queue *q = &txq->q;
-        struct iwl3945_tfd_frame *tfd;
-        u32 *control_flags;
+        struct iwl3945_tfd *tfd;
         struct iwl_cmd *out_cmd;
         u32 idx;
         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
         dma_addr_t phys_addr;
         int pad;
-        u16 count;
         int ret;
         unsigned long flags;
 
@@ -475,11 +474,9 @@ static int iwl3945_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 
         spin_lock_irqsave(&priv->hcmd_lock, flags);
 
-        tfd = &txq->bd[q->write_ptr];
+        tfd = &txq->tfds[q->write_ptr];
         memset(tfd, 0, sizeof(*tfd));
 
-        control_flags = (u32 *) tfd;
-
         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
         out_cmd = &txq->cmd[idx];
 
@@ -501,8 +498,7 @@ static int iwl3945_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
         iwl3945_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 
         pad = U32_PAD(cmd->len);
-        count = TFD_CTL_COUNT_GET(*control_flags);
-        *control_flags = TFD_CTL_COUNT_SET(count) | TFD_CTL_PAD_SET(pad);
+        tfd->control_flags |= cpu_to_le32(TFD_CTL_PAD_SET(pad));
 
         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
                      "%d bytes at %d[%d]:%d\n",
@@ -2231,8 +2227,7 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 {
         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-        struct iwl3945_tfd_frame *tfd;
-        u32 *control_flags;
+        struct iwl3945_tfd *tfd;
         int txq_id = skb_get_queue_mapping(skb);
         struct iwl3945_tx_queue *txq = NULL;
         struct iwl_queue *q = NULL;
@@ -2317,13 +2312,12 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
         spin_lock_irqsave(&priv->lock, flags);
 
         /* Set up first empty TFD within this queue's circular TFD buffer */
-        tfd = &txq->bd[q->write_ptr];
+        tfd = &txq->tfds[q->write_ptr];
         memset(tfd, 0, sizeof(*tfd));
-        control_flags = (u32 *) tfd;
         idx = get_cmd_index(q, q->write_ptr, 0);
 
         /* Set up driver data for this TFD */
-        memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl3945_tx_info));
+        memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info));
         txq->txb[q->write_ptr].skb[0] = skb;
 
         /* Init first empty entry in queue's array of Tx/cmd buffers */
@@ -2387,12 +2381,12 @@ static int iwl3945_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 
         if (!len)
                 /* If there is no payload, then we use only one Tx buffer */
-                *control_flags = TFD_CTL_COUNT_SET(1);
+                tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(1));
         else
                 /* Else use 2 buffers.
                  * Tell 3945 about any padding after MAC header */
-                *control_flags = TFD_CTL_COUNT_SET(2) |
-                        TFD_CTL_PAD_SET(U32_PAD(len));
+                tfd->control_flags = cpu_to_le32(TFD_CTL_COUNT_SET(2) |
+                        TFD_CTL_PAD_SET(U32_PAD(len)));
 
         /* Total # bytes to be transmitted */
         len = (u16)skb->len;