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qlcnic: avoid mixed mode interrupts for some adapter types

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o Some adapter types do not support co-existence of Legacy Interrupt with
  MSI-x or MSI among multiple functions. For those adapters, prevent attaching
  to a function during normal load, if MSI-x or MSI vectors are not available.
o Using module parameters use_msi=0 and use_msi_x=0, driver can be loaded in
  legacy mode for all functions in the adapter.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Manish chopra 2013-01-25 10:20:37 +00:00 committed by David S. Miller
parent efbcb1b20a
commit 9a97e7053a
1 changed files with 26 additions and 9 deletions
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35
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
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@ -395,8 +395,9 @@ int qlcnic_enable_msix(struct qlcnic_adapter *adapter, u32 num_msix)
return err;
}
static void qlcnic_enable_msi_legacy(struct qlcnic_adapter *adapter)
static int qlcnic_enable_msi_legacy(struct qlcnic_adapter *adapter)
{
int err = 0;
u32 offset, mask_reg;
const struct qlcnic_legacy_intr_set *legacy_intrp;
struct qlcnic_hardware_context *ahw = adapter->ahw;
@ -409,8 +410,10 @@ static void qlcnic_enable_msi_legacy(struct qlcnic_adapter *adapter)
offset);
dev_info(&pdev->dev, "using msi interrupts\n");
adapter->msix_entries[0].vector = pdev->irq;
return;
return err;
}
if (qlcnic_use_msi || qlcnic_use_msi_x)
return -EOPNOTSUPP;
legacy_intrp = &legacy_intr[adapter->ahw->pci_func];
adapter->ahw->int_vec_bit = legacy_intrp->int_vec_bit;
@ -422,11 +425,12 @@ static void qlcnic_enable_msi_legacy(struct qlcnic_adapter *adapter)
adapter->crb_int_state_reg = qlcnic_get_ioaddr(ahw, ISR_INT_STATE_REG);
dev_info(&pdev->dev, "using legacy interrupts\n");
adapter->msix_entries[0].vector = pdev->irq;
return err;
}
int qlcnic_82xx_setup_intr(struct qlcnic_adapter *adapter, u8 num_intr)
{
int num_msix, err;
int num_msix, err = 0;
if (!num_intr)
num_intr = QLCNIC_DEF_NUM_STS_DESC_RINGS;
@ -441,8 +445,11 @@ int qlcnic_82xx_setup_intr(struct qlcnic_adapter *adapter, u8 num_intr)
if (err == -ENOMEM || !err)
return err;
qlcnic_enable_msi_legacy(adapter);
return 0;
err = qlcnic_enable_msi_legacy(adapter);
if (!err)
return err;
return -EIO;
}
void qlcnic_teardown_intr(struct qlcnic_adapter *adapter)
@ -1843,8 +1850,10 @@ qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
board_name, adapter->ahw->revision_id);
}
err = qlcnic_setup_intr(adapter, 0);
if (err)
if (err) {
dev_err(&pdev->dev, "Failed to setup interrupt\n");
goto err_out_disable_msi;
}
if (qlcnic_83xx_check(adapter)) {
err = qlcnic_83xx_setup_mbx_intr(adapter);
@ -2976,6 +2985,12 @@ static int qlcnic_attach_func(struct pci_dev *pdev)
adapter->msix_entries = NULL;
err = qlcnic_setup_intr(adapter, 0);
if (err) {
kfree(adapter->msix_entries);
netdev_err(netdev, "failed to setup interrupt\n");
return err;
}
if (qlcnic_83xx_check(adapter)) {
err = qlcnic_83xx_setup_mbx_intr(adapter);
if (err) {
@ -3131,9 +3146,11 @@ int qlcnic_set_max_rss(struct qlcnic_adapter *adapter, u8 data, size_t len)
qlcnic_detach(adapter);
qlcnic_teardown_intr(adapter);
err = qlcnic_setup_intr(adapter, data);
if (err)
dev_err(&adapter->pdev->dev,
"failed setting max_rss; rss disabled\n");
if (err) {
kfree(adapter->msix_entries);
netdev_err(netdev, "failed to setup interrupt\n");
return err;
}
if (qlcnic_83xx_check(adapter)) {
err = qlcnic_83xx_setup_mbx_intr(adapter);