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authorDhananjay Phadke <dhananjay@netxen.com>2009-08-01 21:36:16 +0000
committerDavid S. Miller <davem@davemloft.net>2009-08-02 12:20:44 -0700
commit50c643e7652458e649955408685a16e88ea6dbae (patch)
tree495b87dcf5b6ab717139ba035fcc2e302ec8928d /drivers/net
parent9bfdac94c78faf68ce038d5c45a385927f2667ce (diff)
netxen: fix coherent dma mask setting
Change default dma mask for NX3031 to 39 bit with ability to update it to 64-bit (if firmware indicates support). Old code was restricting it under 4GB (32-bit), sometimes causing failure to allocate descriptor rings on heavily populated system. NX2031 based NICs will still get 32-bit coherent mask. Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/netxen/netxen_nic_main.c37
1 files changed, 25 insertions, 12 deletions
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 637ac8b89ba..3cd8cfcf627 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -221,7 +221,7 @@ netxen_napi_disable(struct netxen_adapter *adapter)
}
}
-static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
+static int nx_set_dma_mask(struct netxen_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
uint64_t mask, cmask;
@@ -229,19 +229,17 @@ static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
adapter->pci_using_dac = 0;
mask = DMA_BIT_MASK(32);
- /*
- * Consistent DMA mask is set to 32 bit because it cannot be set to
- * 35 bits. For P3 also leave it at 32 bits for now. Only the rings
- * come off this pool.
- */
cmask = DMA_BIT_MASK(32);
+ if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
#ifndef CONFIG_IA64
- if (revision_id >= NX_P3_B0)
- mask = DMA_BIT_MASK(39);
- else if (revision_id == NX_P2_C1)
mask = DMA_BIT_MASK(35);
#endif
+ } else {
+ mask = DMA_BIT_MASK(39);
+ cmask = mask;
+ }
+
if (pci_set_dma_mask(pdev, mask) == 0 &&
pci_set_consistent_dma_mask(pdev, cmask) == 0) {
adapter->pci_using_dac = 1;
@@ -256,7 +254,7 @@ static int
nx_update_dma_mask(struct netxen_adapter *adapter)
{
int change, shift, err;
- uint64_t mask, old_mask;
+ uint64_t mask, old_mask, old_cmask;
struct pci_dev *pdev = adapter->pdev;
change = 0;
@@ -272,14 +270,29 @@ nx_update_dma_mask(struct netxen_adapter *adapter)
if (change) {
old_mask = pdev->dma_mask;
+ old_cmask = pdev->dev.coherent_dma_mask;
+
mask = (1ULL<<(32+shift)) - 1;
err = pci_set_dma_mask(pdev, mask);
if (err)
- return pci_set_dma_mask(pdev, old_mask);
+ goto err_out;
+
+ if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
+
+ err = pci_set_consistent_dma_mask(pdev, mask);
+ if (err)
+ goto err_out;
+ }
+ dev_info(&pdev->dev, "using %d-bit dma mask\n", 32+shift);
}
return 0;
+
+err_out:
+ pci_set_dma_mask(pdev, old_mask);
+ pci_set_consistent_dma_mask(pdev, old_cmask);
+ return err;
}
static void netxen_check_options(struct netxen_adapter *adapter)
@@ -1006,7 +1019,7 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
revision_id = pdev->revision;
adapter->ahw.revision_id = revision_id;
- err = nx_set_dma_mask(adapter, revision_id);
+ err = nx_set_dma_mask(adapter);
if (err)
goto err_out_free_netdev;