netdev - [PATCH net-next-2.6 4/6] atm: [iphase] 64-bit cleanup

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Message-Id: <200806171316.m5HDGVnS005896@cmf.nrl.navy.mil>
Date:	Tue, 17 Jun 2008 09:16:31 -0400
From:	"chas williams - CONTRACTOR" <chas@....nrl.navy.mil>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net
Subject: [PATCH net-next-2.6 4/6] atm: [iphase] 64-bit cleanup

commit dd58224cdac8797a3ac4992337d1849018f1fd83
Author: Alan Cox <alan@...hat.com>
Date:   Sat Jun 14 17:37:02 2008 -0400

    atm: [iphase] 64-bit cleanup
    
    This fixes the most obvious 64-bit problems, but it is still very very
    broken in other aspects.
    
    Signed-off-by: Alan Cox <alan@...hat.com>
    Signed-off-by: Chas Williams <chas@....nrl.navy.mil>

diff --git a/drivers/atm/Kconfig b/drivers/atm/Kconfig
index b554eda..1c7ae30 100644
--- a/drivers/atm/Kconfig
+++ b/drivers/atm/Kconfig
@@ -294,7 +294,7 @@ config ATM_HORIZON_DEBUG
 
 config ATM_IA
 	tristate "Interphase ATM PCI x575/x525/x531"
-	depends on PCI && !64BIT
+	depends on PCI
 	---help---
 	  This is a driver for the Interphase (i)ChipSAR adapter cards
 	  which include a variety of variants in term of the size of the
diff --git a/drivers/atm/iphase.c b/drivers/atm/iphase.c
index 14e4638..24df73a 100644
--- a/drivers/atm/iphase.c
+++ b/drivers/atm/iphase.c
@@ -89,10 +89,6 @@ module_param(IADebugFlag, uint, 0644);
 
 MODULE_LICENSE("GPL");
 
-#if BITS_PER_LONG != 32
-#  error FIXME: this driver only works on 32-bit platforms
-#endif
-
 /**************************** IA_LIB **********************************/
 
 static void ia_init_rtn_q (IARTN_Q *que) 
@@ -1406,7 +1402,6 @@ static int rx_init(struct atm_dev *dev)
 	struct abr_vc_table  *abr_vc_table; 
 	u16 *vc_table;  
 	u16 *reass_table;  
-        u16 *ptr16;
 	int i,j, vcsize_sel;  
 	u_short freeq_st_adr;  
 	u_short *freeq_start;  
@@ -1421,14 +1416,15 @@ static int rx_init(struct atm_dev *dev)
 		printk(KERN_ERR DEV_LABEL "can't allocate DLEs\n");
 		goto err_out;
 	}
-	iadev->rx_dle_q.start = (struct dle*)dle_addr;  
+	iadev->rx_dle_q.start = (struct dle *)dle_addr;
 	iadev->rx_dle_q.read = iadev->rx_dle_q.start;  
 	iadev->rx_dle_q.write = iadev->rx_dle_q.start;  
-	iadev->rx_dle_q.end = (struct dle*)((u32)dle_addr+sizeof(struct dle)*DLE_ENTRIES);  
+	iadev->rx_dle_q.end = (struct dle*)((unsigned long)dle_addr+sizeof(struct dle)*DLE_ENTRIES);
 	/* the end of the dle q points to the entry after the last  
 	DLE that can be used. */  
   
 	/* write the upper 20 bits of the start address to rx list address register */  
+	/* We know this is 32bit bus addressed so the following is safe */
 	writel(iadev->rx_dle_dma & 0xfffff000,
 	       iadev->dma + IPHASE5575_RX_LIST_ADDR);  
 	IF_INIT(printk("Tx Dle list addr: 0x%08x value: 0x%0x\n", 
@@ -1582,11 +1578,12 @@ static int rx_init(struct atm_dev *dev)
 	   Set Packet Aging Interval count register to overflow in about 4 us
  	*/  
         writew(0xF6F8, iadev->reass_reg+PKT_TM_CNT );
-        ptr16 = (u16*)j;
-        i = ((u32)ptr16 >> 6) & 0xff;
-	ptr16  += j - 1;
-	i |=(((u32)ptr16 << 2) & 0xff00);
+
+        i = (j >> 6) & 0xFF;
+        j += 2 * (j - 1);
+        i |= ((j << 2) & 0xFF00);
         writew(i, iadev->reass_reg+TMOUT_RANGE);
+
         /* initiate the desc_tble */
         for(i=0; i<iadev->num_tx_desc;i++)
             iadev->desc_tbl[i].timestamp = 0;
@@ -1909,7 +1906,7 @@ static int tx_init(struct atm_dev *dev)
 	iadev->tx_dle_q.start = (struct dle*)dle_addr;  
 	iadev->tx_dle_q.read = iadev->tx_dle_q.start;  
 	iadev->tx_dle_q.write = iadev->tx_dle_q.start;  
-	iadev->tx_dle_q.end = (struct dle*)((u32)dle_addr+sizeof(struct dle)*DLE_ENTRIES);  
+	iadev->tx_dle_q.end = (struct dle*)((unsigned long)dle_addr+sizeof(struct dle)*DLE_ENTRIES);
 
 	/* write the upper 20 bits of the start address to tx list address register */  
 	writel(iadev->tx_dle_dma & 0xfffff000,
@@ -2902,7 +2899,7 @@ static int ia_pkt_tx (struct atm_vcc *vcc, struct sk_buff *skb) {
                  dev_kfree_skb_any(skb);
           return 0;
         }
-        if ((u32)skb->data & 3) {
+        if ((unsigned long)skb->data & 3) {
            printk("Misaligned SKB\n");
            if (vcc->pop)
                  vcc->pop(vcc, skb);
--
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