[PATCH] forcedeth config: module parameters

This patch adds (and modifies) module parameter support.
Signed-Off-By: NAyaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/net/forcedeth.c

@@ -761,8 +761,10 @@ static int max_interrupt_work = 5;
  * Throughput Mode: Every tx and rx packet will generate an interrupt.
  * CPU Mode: Interrupts are controlled by a timer.
  */
-#define NV_OPTIMIZATION_MODE_THROUGHPUT 0
-#define NV_OPTIMIZATION_MODE_CPU        1
+enum {
+	NV_OPTIMIZATION_MODE_THROUGHPUT,
+	NV_OPTIMIZATION_MODE_CPU
+};
 static int optimization_mode = NV_OPTIMIZATION_MODE_THROUGHPUT;
 
 /*
@@ -775,14 +777,31 @@ static int optimization_mode = NV_OPTIMIZATION_MODE_THROUGHPUT;
 static int poll_interval = -1;
 
 /*
- * Disable MSI interrupts
+ * MSI interrupts
  */
-static int disable_msi = 0;
+enum {
+	NV_MSI_INT_DISABLED,
+	NV_MSI_INT_ENABLED
+};
+static int msi = NV_MSI_INT_ENABLED;
 
 /*
- * Disable MSIX interrupts
+ * MSIX interrupts
  */
-static int disable_msix = 0;
+enum {
+	NV_MSIX_INT_DISABLED,
+	NV_MSIX_INT_ENABLED
+};
+static int msix = NV_MSIX_INT_ENABLED;
+
+/*
+ * DMA 64bit
+ */
+enum {
+	NV_DMA_64BIT_DISABLED,
+	NV_DMA_64BIT_ENABLED
+};
+static int dma_64bit = NV_DMA_64BIT_ENABLED;
 
 static inline struct fe_priv *get_nvpriv(struct net_device *dev)
 {
@@ -4115,16 +4134,18 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i
 		/* packet format 3: supports 40-bit addressing */
 		np->desc_ver = DESC_VER_3;
 		np->txrxctl_bits = NVREG_TXRXCTL_DESC_3;
-		if (pci_set_dma_mask(pci_dev, DMA_39BIT_MASK)) {
-			printk(KERN_INFO "forcedeth: 64-bit DMA failed, using 32-bit addressing for device %s.\n",
-					pci_name(pci_dev));
-		} else {
-			dev->features |= NETIF_F_HIGHDMA;
-			printk(KERN_INFO "forcedeth: using HIGHDMA\n");
-		}
-		if (pci_set_consistent_dma_mask(pci_dev, 0x0000007fffffffffULL)) {
-			printk(KERN_INFO "forcedeth: 64-bit DMA (consistent) failed for device %s.\n",
-			       pci_name(pci_dev));
+		if (dma_64bit) {
+			if (pci_set_dma_mask(pci_dev, DMA_39BIT_MASK)) {
+				printk(KERN_INFO "forcedeth: 64-bit DMA failed, using 32-bit addressing for device %s.\n",
+				       pci_name(pci_dev));
+			} else {
+				dev->features |= NETIF_F_HIGHDMA;
+				printk(KERN_INFO "forcedeth: using HIGHDMA\n");
+			}
+			if (pci_set_consistent_dma_mask(pci_dev, DMA_39BIT_MASK)) {
+				printk(KERN_INFO "forcedeth: 64-bit DMA (consistent) failed, using 32-bit ring buffers for device %s.\n",
+				       pci_name(pci_dev));
+			}
 		}
 	} else if (id->driver_data & DEV_HAS_LARGEDESC) {
 		/* packet format 2: supports jumbo frames */
@@ -4157,10 +4178,10 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i
 	}
 
 	np->msi_flags = 0;
-	if ((id->driver_data & DEV_HAS_MSI) && !disable_msi) {
+	if ((id->driver_data & DEV_HAS_MSI) && msi) {
 		np->msi_flags |= NV_MSI_CAPABLE;
 	}
-	if ((id->driver_data & DEV_HAS_MSI_X) && !disable_msix) {
+	if ((id->driver_data & DEV_HAS_MSI_X) && msix) {
 		np->msi_flags |= NV_MSI_X_CAPABLE;
 	}
 
@@ -4473,10 +4494,12 @@ module_param(optimization_mode, int, 0);
 MODULE_PARM_DESC(optimization_mode, "In throughput mode (0), every tx & rx packet will generate an interrupt. In CPU mode (1), interrupts are controlled by a timer.");
 module_param(poll_interval, int, 0);
 MODULE_PARM_DESC(poll_interval, "Interval determines how frequent timer interrupt is generated by [(time_in_micro_secs * 100) / (2^10)]. Min is 0 and Max is 65535.");
-module_param(disable_msi, int, 0);
-MODULE_PARM_DESC(disable_msi, "Disable MSI interrupts by setting to 1.");
-module_param(disable_msix, int, 0);
-MODULE_PARM_DESC(disable_msix, "Disable MSIX interrupts by setting to 1.");
+module_param(msi, int, 0);
+MODULE_PARM_DESC(msi, "MSI interrupts are enabled by setting to 1 and disabled by setting to 0.");
+module_param(msix, int, 0);
+MODULE_PARM_DESC(msix, "MSIX interrupts are enabled by setting to 1 and disabled by setting to 0.");
+module_param(dma_64bit, int, 0);
+MODULE_PARM_DESC(dma_64bit, "High DMA is enabled by setting to 1 and disabled by setting to 0.");
 
 MODULE_AUTHOR("Manfred Spraul <manfred@colorfullife.com>");
 MODULE_DESCRIPTION("Reverse Engineered nForce ethernet driver");