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Message-ID: <1178177330.4909.67.camel@dell>
Date: Thu, 03 May 2007 00:28:50 -0700
From: "Michael Chan" <mchan@...adcom.com>
To: "David Miller" <davem@...emloft.net>
cc: "netdev" <netdev@...r.kernel.org>
Subject: [PATCH v2 3/16][BNX2]: Add 40-bit DMA workaround for 5708.
[BNX2]: Add 40-bit DMA workaround for 5708.
The internal PCIE-to-PCIX bridge of the 5708 has the same 40-bit DMA
limitation as some of the tg3 chips. Set dma_mask and persistent DMA
mask to 40-bit to workaround.
Signed-off-by: Michael Chan <mchan@...adcom.com>
diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 6d05397..679ee66 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -5711,6 +5711,7 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
unsigned long mem_len;
int rc;
u32 reg;
+ u64 dma_mask, persist_dma_mask;
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
@@ -5749,21 +5750,6 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
goto err_out_release;
}
- if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
- bp->flags |= USING_DAC_FLAG;
- if (pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
- dev_err(&pdev->dev,
- "pci_set_consistent_dma_mask failed, aborting.\n");
- rc = -EIO;
- goto err_out_release;
- }
- }
- else if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0) {
- dev_err(&pdev->dev, "System does not support DMA, aborting.\n");
- rc = -EIO;
- goto err_out_release;
- }
-
bp->dev = dev;
bp->pdev = pdev;
@@ -5805,6 +5791,26 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
}
}
+ /* 5708 cannot support DMA addresses > 40-bit. */
+ if (CHIP_NUM(bp) == CHIP_NUM_5708)
+ persist_dma_mask = dma_mask = DMA_40BIT_MASK;
+ else
+ persist_dma_mask = dma_mask = DMA_64BIT_MASK;
+
+ /* Configure DMA attributes. */
+ if (pci_set_dma_mask(pdev, dma_mask) == 0) {
+ dev->features |= NETIF_F_HIGHDMA;
+ rc = pci_set_consistent_dma_mask(pdev, persist_dma_mask);
+ if (rc) {
+ dev_err(&pdev->dev,
+ "pci_set_consistent_dma_mask failed, aborting.\n");
+ goto err_out_unmap;
+ }
+ } else if ((rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) != 0) {
+ dev_err(&pdev->dev, "System does not support DMA, aborting.\n");
+ goto err_out_unmap;
+ }
+
/* Get bus information. */
reg = REG_RD(bp, BNX2_PCICFG_MISC_STATUS);
if (reg & BNX2_PCICFG_MISC_STATUS_PCIX_DET) {
@@ -6114,8 +6120,6 @@ bnx2_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
printk("\n");
dev->features |= NETIF_F_SG;
- if (bp->flags & USING_DAC_FLAG)
- dev->features |= NETIF_F_HIGHDMA;
dev->features |= NETIF_F_IP_CSUM;
#ifdef BCM_VLAN
dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index 878eee5..8e7b29a 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -6433,7 +6433,6 @@ struct bnx2 {
#define PCI_32BIT_FLAG 2
#define ONE_TDMA_FLAG 4 /* no longer used */
#define NO_WOL_FLAG 8
-#define USING_DAC_FLAG 0x10
#define USING_MSI_FLAG 0x20
#define ASF_ENABLE_FLAG 0x40
-
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