dscc4 endian fixes

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 49 insertions, 45 deletions

diff --git a/drivers/net/wan/dscc4.c b/drivers/net/wan/dscc4.c
index 33dc713b53..c6f26e28e3 100644
--- a/drivers/net/wan/dscc4.c
+++ b/drivers/net/wan/dscc4.c
@@ -139,19 +139,21 @@ struct thingie {
 };
 
 struct TxFD {
-        u32 state;
-        u32 next;
-        u32 data;
-        u32 complete;
+        __le32 state;
+        __le32 next;
+        __le32 data;
+        __le32 complete;
         u32 jiffies; /* Allows sizeof(TxFD) == sizeof(RxFD) + extra hack */
+                     /* FWIW, datasheet calls that "dummy" and says that card
+                      * never looks at it; neither does the driver */
 };
 
 struct RxFD {
-        u32 state1;
-        u32 next;
-        u32 data;
-        u32 state2;
-        u32 end;
+        __le32 state1;
+        __le32 next;
+        __le32 data;
+        __le32 state2;
+        __le32 end;
 };
 
 #define DUMMY_SKB_SIZE          64
@@ -181,7 +183,7 @@ struct RxFD {
 #define SCC_REG_START(dpriv)    (SCC_START+(dpriv->dev_id)*SCC_OFFSET)
 
 struct dscc4_pci_priv {
-        u32 *iqcfg;
+        __le32 *iqcfg;
         int cfg_cur;
         spinlock_t lock;
         struct pci_dev *pdev;
@@ -197,8 +199,8 @@ struct dscc4_dev_priv {
 
         struct RxFD *rx_fd;
         struct TxFD *tx_fd;
-        u32 *iqrx;
-        u32 *iqtx;
+        __le32 *iqrx;
+        __le32 *iqtx;
 
         /* FIXME: check all the volatile are required */
         volatile u32 tx_current;
@@ -298,7 +300,7 @@ struct dscc4_dev_priv {
 #define BrrExpMask      0x00000f00
 #define BrrMultMask     0x0000003f
 #define EncodingMask    0x00700000
-#define Hold            0x40000000
+#define Hold            cpu_to_le32(0x40000000)
 #define SccBusy         0x10000000
 #define PowerUp         0x80000000
 #define Vis             0x00001000
@@ -307,14 +309,14 @@ struct dscc4_dev_priv {
 #define FrameRdo        0x40
 #define FrameCrc        0x20
 #define FrameRab        0x10
-#define FrameAborted    0x00000200
-#define FrameEnd        0x80000000
-#define DataComplete    0x40000000
+#define FrameAborted    cpu_to_le32(0x00000200)
+#define FrameEnd        cpu_to_le32(0x80000000)
+#define DataComplete    cpu_to_le32(0x40000000)
 #define LengthCheck     0x00008000
 #define SccEvt          0x02000000
 #define NoAck           0x00000200
 #define Action          0x00000001
-#define HiDesc          0x20000000
+#define HiDesc          cpu_to_le32(0x20000000)
 
 /* SCC events */
 #define RxEvt           0xf0000000
@@ -489,8 +491,8 @@ static void dscc4_release_ring(struct dscc4_dev_priv *dpriv)
         skbuff = dpriv->tx_skbuff;
         for (i = 0; i < TX_RING_SIZE; i++) {
                 if (*skbuff) {
-                        pci_unmap_single(pdev, tx_fd->data, (*skbuff)->len,
-                                PCI_DMA_TODEVICE);
+                        pci_unmap_single(pdev, le32_to_cpu(tx_fd->data),
+                                (*skbuff)->len, PCI_DMA_TODEVICE);
                         dev_kfree_skb(*skbuff);
                 }
                 skbuff++;
@@ -500,7 +502,7 @@ static void dscc4_release_ring(struct dscc4_dev_priv *dpriv)
         skbuff = dpriv->rx_skbuff;
         for (i = 0; i < RX_RING_SIZE; i++) {
                 if (*skbuff) {
-                        pci_unmap_single(pdev, rx_fd->data,
+                        pci_unmap_single(pdev, le32_to_cpu(rx_fd->data),
                                 RX_MAX(HDLC_MAX_MRU), PCI_DMA_FROMDEVICE);
                         dev_kfree_skb(*skbuff);
                 }
@@ -522,10 +524,10 @@ static inline int try_get_rx_skb(struct dscc4_dev_priv *dpriv,
         dpriv->rx_skbuff[dirty] = skb;
         if (skb) {
                 skb->protocol = hdlc_type_trans(skb, dev);
-                rx_fd->data = pci_map_single(dpriv->pci_priv->pdev, skb->data,
-                                             len, PCI_DMA_FROMDEVICE);
+                rx_fd->data = cpu_to_le32(pci_map_single(dpriv->pci_priv->pdev,
+                                          skb->data, len, PCI_DMA_FROMDEVICE));
         } else {
-                rx_fd->data = (u32) NULL;
+                rx_fd->data = 0;
                 ret = -1;
         }
         return ret;
@@ -587,7 +589,7 @@ static inline int dscc4_xpr_ack(struct dscc4_dev_priv *dpriv)
 
         do {
                 if (!(dpriv->flags & (NeedIDR | NeedIDT)) ||
-                    (dpriv->iqtx[cur] & Xpr))
+                    (dpriv->iqtx[cur] & cpu_to_le32(Xpr)))
                         break;
                 smp_rmb();
                 schedule_timeout_uninterruptible(10);
@@ -650,8 +652,9 @@ static inline void dscc4_rx_skb(struct dscc4_dev_priv *dpriv,
                 printk(KERN_DEBUG "%s: skb=0 (%s)\n", dev->name, __FUNCTION__);
                 goto refill;
         }
-        pkt_len = TO_SIZE(rx_fd->state2);
-        pci_unmap_single(pdev, rx_fd->data, RX_MAX(HDLC_MAX_MRU), PCI_DMA_FROMDEVICE);
+        pkt_len = TO_SIZE(le32_to_cpu(rx_fd->state2));
+        pci_unmap_single(pdev, le32_to_cpu(rx_fd->data),
+                         RX_MAX(HDLC_MAX_MRU), PCI_DMA_FROMDEVICE);
         if ((skb->data[--pkt_len] & FrameOk) == FrameOk) {
                 stats->rx_packets++;
                 stats->rx_bytes += pkt_len;
@@ -679,7 +682,7 @@ refill:
         }
         dscc4_rx_update(dpriv, dev);
         rx_fd->state2 = 0x00000000;
-        rx_fd->end = 0xbabeface;
+        rx_fd->end = cpu_to_le32(0xbabeface);
 }
 
 static void dscc4_free1(struct pci_dev *pdev)
@@ -772,8 +775,8 @@ static int __devinit dscc4_init_one(struct pci_dev *pdev,
         }
         /* Global interrupt queue */
         writel((u32)(((IRQ_RING_SIZE >> 5) - 1) << 20), ioaddr + IQLENR1);
-        priv->iqcfg = (u32 *) pci_alloc_consistent(pdev,
-                IRQ_RING_SIZE*sizeof(u32), &priv->iqcfg_dma);
+        priv->iqcfg = (__le32 *) pci_alloc_consistent(pdev,
+                IRQ_RING_SIZE*sizeof(__le32), &priv->iqcfg_dma);
         if (!priv->iqcfg)
                 goto err_free_irq_5;
         writel(priv->iqcfg_dma, ioaddr + IQCFG);
@@ -786,7 +789,7 @@ static int __devinit dscc4_init_one(struct pci_dev *pdev,
          */
         for (i = 0; i < dev_per_card; i++) {
                 dpriv = priv->root + i;
-                dpriv->iqtx = (u32 *) pci_alloc_consistent(pdev,
+                dpriv->iqtx = (__le32 *) pci_alloc_consistent(pdev,
                         IRQ_RING_SIZE*sizeof(u32), &dpriv->iqtx_dma);
                 if (!dpriv->iqtx)
                         goto err_free_iqtx_6;
@@ -794,7 +797,7 @@ static int __devinit dscc4_init_one(struct pci_dev *pdev,
         }
         for (i = 0; i < dev_per_card; i++) {
                 dpriv = priv->root + i;
-                dpriv->iqrx = (u32 *) pci_alloc_consistent(pdev,
+                dpriv->iqrx = (__le32 *) pci_alloc_consistent(pdev,
                         IRQ_RING_SIZE*sizeof(u32), &dpriv->iqrx_dma);
                 if (!dpriv->iqrx)
                         goto err_free_iqrx_7;
@@ -1156,8 +1159,8 @@ static int dscc4_start_xmit(struct sk_buff *skb, struct net_device *dev)
         dpriv->tx_skbuff[next] = skb;
         tx_fd = dpriv->tx_fd + next;
         tx_fd->state = FrameEnd | TO_STATE_TX(skb->len);
-        tx_fd->data = pci_map_single(ppriv->pdev, skb->data, skb->len,
-                                     PCI_DMA_TODEVICE);
+        tx_fd->data = cpu_to_le32(pci_map_single(ppriv->pdev, skb->data, skb->len,
+                                     PCI_DMA_TODEVICE));
         tx_fd->complete = 0x00000000;
         tx_fd->jiffies = jiffies;
         mb();
@@ -1508,7 +1511,7 @@ static irqreturn_t dscc4_irq(int irq, void *token)
         if (state & Cfg) {
                 if (debug > 0)
                         printk(KERN_DEBUG "%s: CfgIV\n", DRV_NAME);
-                if (priv->iqcfg[priv->cfg_cur++%IRQ_RING_SIZE] & Arf)
+                if (priv->iqcfg[priv->cfg_cur++%IRQ_RING_SIZE] & cpu_to_le32(Arf))
                         printk(KERN_ERR "%s: %s failed\n", dev->name, "CFG");
                 if (!(state &= ~Cfg))
                         goto out;
@@ -1541,7 +1544,7 @@ static void dscc4_tx_irq(struct dscc4_pci_priv *ppriv,
 
 try:
         cur = dpriv->iqtx_current%IRQ_RING_SIZE;
-        state = dpriv->iqtx[cur];
+        state = le32_to_cpu(dpriv->iqtx[cur]);
         if (!state) {
                 if (debug > 4)
                         printk(KERN_DEBUG "%s: Tx ISR = 0x%08x\n", dev->name,
@@ -1580,7 +1583,7 @@ try:
                         tx_fd = dpriv->tx_fd + cur;
                         skb = dpriv->tx_skbuff[cur];
                         if (skb) {
-                                pci_unmap_single(ppriv->pdev, tx_fd->data,
+                                pci_unmap_single(ppriv->pdev, le32_to_cpu(tx_fd->data),
                                                  skb->len, PCI_DMA_TODEVICE);
                                 if (tx_fd->state & FrameEnd) {
                                         stats->tx_packets++;
@@ -1711,7 +1714,7 @@ static void dscc4_rx_irq(struct dscc4_pci_priv *priv,
 
 try:
         cur = dpriv->iqrx_current%IRQ_RING_SIZE;
-        state = dpriv->iqrx[cur];
+        state = le32_to_cpu(dpriv->iqrx[cur]);
         if (!state)
                 return;
         dpriv->iqrx[cur] = 0;
@@ -1755,7 +1758,7 @@ try:
                                         goto try;
                                 rx_fd->state1 &= ~Hold;
                                 rx_fd->state2 = 0x00000000;
-                                rx_fd->end = 0xbabeface;
+                                rx_fd->end = cpu_to_le32(0xbabeface);
                         //}
                         goto try;
                 }
@@ -1834,7 +1837,7 @@ try:
                                         hdlc_stats(dev)->rx_over_errors++;
                                         rx_fd->state1 |= Hold;
                                         rx_fd->state2 = 0x00000000;
-                                        rx_fd->end = 0xbabeface;
+                                        rx_fd->end = cpu_to_le32(0xbabeface);
                                 } else
                                         dscc4_rx_skb(dpriv, dev);
                         } while (1);
@@ -1904,8 +1907,9 @@ static struct sk_buff *dscc4_init_dummy_skb(struct dscc4_dev_priv *dpriv)
                 skb_copy_to_linear_data(skb, version,
                                         strlen(version) % DUMMY_SKB_SIZE);
                 tx_fd->state = FrameEnd | TO_STATE_TX(DUMMY_SKB_SIZE);
-                tx_fd->data = pci_map_single(dpriv->pci_priv->pdev, skb->data,
-                                             DUMMY_SKB_SIZE, PCI_DMA_TODEVICE);
+                tx_fd->data = cpu_to_le32(pci_map_single(dpriv->pci_priv->pdev,
+                                             skb->data, DUMMY_SKB_SIZE,
+                                             PCI_DMA_TODEVICE));
                 dpriv->tx_skbuff[last] = skb;
         }
         return skb;
@@ -1937,8 +1941,8 @@ static int dscc4_init_ring(struct net_device *dev)
                 tx_fd->state = FrameEnd | TO_STATE_TX(2*DUMMY_SKB_SIZE);
                 tx_fd->complete = 0x00000000;
                 /* FIXME: NULL should be ok - to be tried */
-                tx_fd->data = dpriv->tx_fd_dma;
-                (tx_fd++)->next = (u32)(dpriv->tx_fd_dma +
+                tx_fd->data = cpu_to_le32(dpriv->tx_fd_dma);
+                (tx_fd++)->next = cpu_to_le32(dpriv->tx_fd_dma +
                                         (++i%TX_RING_SIZE)*sizeof(*tx_fd));
         } while (i < TX_RING_SIZE);
 
@@ -1951,12 +1955,12 @@ static int dscc4_init_ring(struct net_device *dev)
                 /* size set by the host. Multiple of 4 bytes please */
                 rx_fd->state1 = HiDesc;
                 rx_fd->state2 = 0x00000000;
-                rx_fd->end = 0xbabeface;
+                rx_fd->end = cpu_to_le32(0xbabeface);
                 rx_fd->state1 |= TO_STATE_RX(HDLC_MAX_MRU);
                 // FIXME: return value verifiee mais traitement suspect
                 if (try_get_rx_skb(dpriv, dev) >= 0)
                         dpriv->rx_dirty++;
-                (rx_fd++)->next = (u32)(dpriv->rx_fd_dma +
+                (rx_fd++)->next = cpu_to_le32(dpriv->rx_fd_dma +
                                         (++i%RX_RING_SIZE)*sizeof(*rx_fd));
         } while (i < RX_RING_SIZE);