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netxen: support larger dma addressing 

Support larger dma mask if firmware indicates capability
to handle larger addresses.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dhananjay Phadke 2009-03-02 16:02:16 +00:00 committed by David S. Miller
parent 7e99013a50
commit 1f434f6384
3 changed files with 45 additions and 32 deletions
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2
drivers/net/netxen/netxen_nic.h
View File

@ -1256,8 +1256,6 @@ struct netxen_adapter {
u32 crb_win;
rwlock_t adapter_lock;
uint64_t dma_mask;
u32 cmd_producer;
__le32 *cmd_consumer;
u32 last_cmd_consumer;

74
drivers/net/netxen/netxen_nic_main.c
View File

@ -166,50 +166,61 @@ static inline void netxen_nic_enable_int(struct netxen_adapter *adapter)
static int nx_set_dma_mask(struct netxen_adapter *adapter, uint8_t revision_id)
{
struct pci_dev *pdev = adapter->pdev;
int err;
uint64_t mask;
uint64_t mask, cmask;
adapter->pci_using_dac = 0;
#ifdef CONFIG_IA64
adapter->dma_mask = DMA_32BIT_MASK;
#else
if (revision_id >= NX_P3_B0) {
/* should go to DMA_64BIT_MASK */
adapter->dma_mask = DMA_39BIT_MASK;
mask = DMA_39BIT_MASK;
} else if (revision_id == NX_P3_A2) {
adapter->dma_mask = DMA_39BIT_MASK;
mask = DMA_39BIT_MASK;
} else if (revision_id == NX_P2_C1) {
adapter->dma_mask = DMA_35BIT_MASK;
mask = DMA_35BIT_MASK;
} else {
adapter->dma_mask = DMA_32BIT_MASK;
mask = DMA_32BIT_MASK;
goto set_32_bit_mask;
}
/*
* 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_32BIT_MASK;
#ifndef CONFIG_IA64
if (revision_id >= NX_P3_B0)
mask = DMA_39BIT_MASK;
else if (revision_id == NX_P2_C1)
mask = DMA_35BIT_MASK;
#endif
if (pci_set_dma_mask(pdev, mask) == 0 &&
pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) == 0) {
pci_set_consistent_dma_mask(pdev, cmask) == 0) {
adapter->pci_using_dac = 1;
return 0;
}
set_32_bit_mask:
#endif /* CONFIG_IA64 */
err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (!err)
err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
if (err) {
DPRINTK(ERR, "No usable DMA configuration, aborting:%d\n", err);
return err;
return -EIO;
}
/* Update addressable range if firmware supports it */
static int
nx_update_dma_mask(struct netxen_adapter *adapter)
{
int change, shift, err;
uint64_t mask, old_mask;
struct pci_dev *pdev = adapter->pdev;
change = 0;
shift = netxen_nic_reg_read(adapter, CRB_DMA_SHIFT);
if (shift >= 32)
return 0;
if (NX_IS_REVISION_P3(adapter->ahw.revision_id) && (shift > 9))
change = 1;
else if ((adapter->ahw.revision_id == NX_P2_C1) && (shift <= 4))
change = 1;
if (change) {
old_mask = pdev->dma_mask;
mask = (1ULL<<(32+shift)) - 1;
err = pci_set_dma_mask(pdev, mask);
if (err)
return pci_set_dma_mask(pdev, old_mask);
}
adapter->pci_using_dac = 0;
return 0;
}
@ -674,6 +685,7 @@ netxen_start_firmware(struct netxen_adapter *adapter)
netxen_pinit_from_rom(adapter, 0);
msleep(1);
}
netxen_nic_reg_write(adapter, CRB_DMA_SHIFT, 0x55555555);
netxen_load_firmware(adapter);
if (NX_IS_REVISION_P2(adapter->ahw.revision_id)) {
@ -851,6 +863,8 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_out_iounmap;
}
nx_update_dma_mask(adapter);
netxen_nic_flash_print(adapter);
if (NX_IS_REVISION_P3(revision_id)) {

1
drivers/net/netxen/netxen_nic_phan_reg.h
View File

@ -91,6 +91,7 @@
#define CRB_RX_LRO_START_NUM NETXEN_NIC_REG(0xc0)
#define CRB_MPORT_MODE NETXEN_NIC_REG(0xc4) /* Multiport Mode */
#define CRB_CMD_RING_SIZE NETXEN_NIC_REG(0xc8)
#define CRB_DMA_SHIFT NETXEN_NIC_REG(0xcc)
#define CRB_INT_VECTOR NETXEN_NIC_REG(0xd4)
#define CRB_CTX_RESET NETXEN_NIC_REG(0xd8)
#define CRB_HOST_STS_PROD NETXEN_NIC_REG(0xdc)