Merge branch 'master'

[linux-2.6] / drivers / net / tg3.c

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 15545620ab0e2d6a2efe77bdb07c99d2bc7a6938..bd49b25fba6b48fa22768839543bf069088ce829 100644 (file)
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -7802,7 +7802,7 @@ static int tg3_test_link(struct tg3 *tp)
 }
 
 /* Only test the commonly used registers */
-static int tg3_test_registers(struct tg3 *tp)
+static const int tg3_test_registers(struct tg3 *tp)
 {
        int i, is_5705;
        u32 offset, read_mask, write_mask, val, save_val, read_val;
@@ -8016,7 +8016,7 @@ out:
 
 static int tg3_do_mem_test(struct tg3 *tp, u32 offset, u32 len)
 {
-       static u32 test_pattern[] = { 0x00000000, 0xffffffff, 0xaa55a55a };
+       static const u32 test_pattern[] = { 0x00000000, 0xffffffff, 0xaa55a55a };
        int i;
        u32 j;
 
@@ -9552,12 +9552,36 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
                }
        }
 
-       /* Find msi capability. */
+       /* The EPB bridge inside 5714, 5715, and 5780 cannot support
+        * DMA addresses > 40-bit. This bridge may have other additional
+        * 57xx devices behind it in some 4-port NIC designs for example.
+        * Any tg3 device found behind the bridge will also need the 40-bit
+        * DMA workaround.
+        */
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5714) {
                tp->tg3_flags2 |= TG3_FLG2_5780_CLASS;
+               tp->tg3_flags |= TG3_FLAG_40BIT_DMA_BUG;
                tp->msi_cap = pci_find_capability(tp->pdev, PCI_CAP_ID_MSI);
        }
+       else {
+               struct pci_dev *bridge = NULL;
+
+               do {
+                       bridge = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
+                                               PCI_DEVICE_ID_SERVERWORKS_EPB,
+                                               bridge);
+                       if (bridge && bridge->subordinate &&
+                           (bridge->subordinate->number <=
+                            tp->pdev->bus->number) &&
+                           (bridge->subordinate->subordinate >=
+                            tp->pdev->bus->number)) {
+                               tp->tg3_flags |= TG3_FLAG_40BIT_DMA_BUG;
+                               pci_dev_put(bridge);
+                               break;
+                       }
+               } while (bridge);
+       }
 
        /* Initialize misc host control in PCI block. */
        tp->misc_host_ctrl |= (misc_ctrl_reg &
@@ -10303,7 +10327,14 @@ static int __devinit tg3_test_dma(struct tg3 *tp)
                    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704) {
                        u32 ccval = (tr32(TG3PCI_CLOCK_CTRL) & 0x1f);
 
-                       if (ccval == 0x6 || ccval == 0x7)
+                       /* If the 5704 is behind the EPB bridge, we can
+                        * do the less restrictive ONE_DMA workaround for
+                        * better performance.
+                        */
+                       if ((tp->tg3_flags & TG3_FLAG_40BIT_DMA_BUG) &&
+                           GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704)
+                               tp->dma_rwctrl |= 0x8000;
+                       else if (ccval == 0x6 || ccval == 0x7)
                                tp->dma_rwctrl |= DMA_RWCTRL_ONE_DMA;
 
                        /* Set bit 23 to enable PCIX hw bug fix */
@@ -10543,8 +10574,6 @@ static char * __devinit tg3_bus_string(struct tg3 *tp, char *str)
                        strcat(str, "66MHz");
                else if (clock_ctrl == 6)
                        strcat(str, "100MHz");
-               else if (clock_ctrl == 7)
-                       strcat(str, "133MHz");
        } else {
                strcpy(str, "PCI:");
                if (tp->tg3_flags & TG3_FLAG_PCI_HIGH_SPEED)
@@ -10761,19 +10790,20 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
                goto err_out_iounmap;
        }
 
-       /* 5714, 5715 and 5780 cannot support DMA addresses > 40-bit.
+       /* The EPB bridge inside 5714, 5715, and 5780 and any
+        * device behind the EPB cannot support DMA addresses > 40-bit.
         * On 64-bit systems with IOMMU, use 40-bit dma_mask.
         * On 64-bit systems without IOMMU, use 64-bit dma_mask and
         * do DMA address check in tg3_start_xmit().
         */
-       if (tp->tg3_flags2 & TG3_FLG2_5780_CLASS) {
+       if (tp->tg3_flags2 & TG3_FLG2_IS_5788)
+               persist_dma_mask = dma_mask = DMA_32BIT_MASK;
+       else if (tp->tg3_flags & TG3_FLAG_40BIT_DMA_BUG) {
                persist_dma_mask = dma_mask = DMA_40BIT_MASK;
 #ifdef CONFIG_HIGHMEM
                dma_mask = DMA_64BIT_MASK;
 #endif
-       } else if (tp->tg3_flags2 & TG3_FLG2_IS_5788)
-               persist_dma_mask = dma_mask = DMA_32BIT_MASK;
-       else
+       } else
                persist_dma_mask = dma_mask = DMA_64BIT_MASK;
 
        /* Configure DMA attributes. */
@@ -10910,8 +10940,10 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
               (tp->tg3_flags & TG3_FLAG_SPLIT_MODE) != 0,
               (tp->tg3_flags2 & TG3_FLG2_NO_ETH_WIRE_SPEED) == 0,
               (tp->tg3_flags2 & TG3_FLG2_TSO_CAPABLE) != 0);
-       printk(KERN_INFO "%s: dma_rwctrl[%08x]\n",
-              dev->name, tp->dma_rwctrl);
+       printk(KERN_INFO "%s: dma_rwctrl[%08x] dma_mask[%d-bit]\n",
+              dev->name, tp->dma_rwctrl,
+              (pdev->dma_mask == DMA_32BIT_MASK) ? 32 :
+               (((u64) pdev->dma_mask == DMA_40BIT_MASK) ? 40 : 64));
 
        return 0;