/* Get link settings and maximum frame size settings
* for the current port.
* Most likely will block.
*/
int ql_mb_get_port_cfg(struct ql_adapter *qdev)
{
struct mbox_params mbc;
struct mbox_params *mbcp = &mbc;
int status = 0;
memset(mbcp, 0, sizeof(struct mbox_params));
mbcp->in_count = 1;
mbcp->out_count = 3;
mbcp->mbox_in[0] = MB_CMD_GET_PORT_CFG;
status = ql_mailbox_command(qdev, mbcp);
if (status)
return status;
if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
netif_err(qdev, drv, qdev->ndev,
"Failed Get Port Configuration.\n");
status = -EIO;
} else {
netif_printk(qdev, drv, KERN_DEBUG, qdev->ndev,
"Passed Get Port Configuration.\n");
qdev->link_config = mbcp->mbox_out[1];
qdev->max_frame_size = mbcp->mbox_out[2];
}
return status;
}
static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
int vectors)
{
int err, vector_threshold;
/* We'll want at least 2 (vector_threshold):
* 1) TxQ[0] + RxQ[0] handler
* 2) Other (Link Status Change, etc.)
*/
vector_threshold = MIN_MSIX_COUNT;
/*
* The more we get, the more we will assign to Tx/Rx Cleanup
* for the separate queues...where Rx Cleanup >= Tx Cleanup.
* Right now, we simply care about how many we'll get; we'll
* set them up later while requesting irq's.
*/
while (vectors >= vector_threshold) {
err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
vectors);
if (!err) /* Success in acquiring all requested vectors. */
break;
else if (err < 0)
vectors = 0; /* Nasty failure, quit now */
else /* err == number of vectors we should try again with */
vectors = err;
}
if (vectors < vector_threshold) {
/* Can't allocate enough MSI-X interrupts? Oh well.
* This just means we'll go with either a single MSI
* vector or fall back to legacy interrupts.
*/
netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
"Unable to allocate MSI-X interrupts\n");
adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
kfree(adapter->msix_entries);
adapter->msix_entries = NULL;
} else {
adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
/*
* Adjust for only the vectors we'll use, which is minimum
* of max_msix_q_vectors + NON_Q_VECTORS, or the number of
* vectors we were allocated.
*/
vectors -= NON_Q_VECTORS;
adapter->num_q_vectors = min(vectors, adapter->max_q_vectors);
}
}
/**
* ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
* @adapter: board private structure to initialize
*
* Attempt to configure the interrupts using the best available
* capabilities of the hardware and the kernel.
**/
static void ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
int vector, v_budget, err;
if (!(adapter->flags & IXGBE_FLAG_MSIX_CAPABLE))
goto try_msi;
/*
* It's easy to be greedy for MSI-X vectors, but it really
* doesn't do us much good if we have a lot more vectors
* than CPU's. So let's be conservative and only ask for
* (roughly) the same number of vectors as there are CPU's.
* The default is to use pairs of vectors.
*/
v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
v_budget = min_t(int, v_budget, num_online_cpus());
v_budget += NON_Q_VECTORS;
/*
* At the same time, hardware can only support a maximum of
* hw.mac->max_msix_vectors vectors. With features
* such as RSS and VMDq, we can easily surpass the number of Rx and Tx
* descriptor queues supported by our device. Thus, we cap it off in
* those rare cases where the cpu count also exceeds our vector limit.
*/
v_budget = min_t(int, v_budget, hw->mac.max_msix_vectors);
/* A failure in MSI-X entry allocation isn't fatal, but it does
* mean we disable MSI-X capabilities of the adapter. */
adapter->msix_entries = kcalloc(v_budget,
sizeof(struct msix_entry), GFP_KERNEL);
if (adapter->msix_entries) {
for (vector = 0; vector < v_budget; vector++)
adapter->msix_entries[vector].entry = vector;
ixgbe_acquire_msix_vectors(adapter, v_budget);
if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
return;
}
try_msi:
/* disable DCB if number of TCs exceeds 1 */
if (netdev_get_num_tc(adapter->netdev) > 1) {
e_err(probe, "num TCs exceeds number of queues - disabling DCB\n");
netdev_reset_tc(adapter->netdev);
if (adapter->hw.mac.type == ixgbe_mac_82598EB)
adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->temp_dcb_cfg.pfc_mode_enable = false;
adapter->dcb_cfg.pfc_mode_enable = false;
}
adapter->dcb_cfg.num_tcs.pg_tcs = 1;
adapter->dcb_cfg.num_tcs.pfc_tcs = 1;
/* disable SR-IOV */
ixgbe_disable_sriov(adapter);
/* disable RSS */
adapter->ring_feature[RING_F_RSS].limit = 1;
ixgbe_set_num_queues(adapter);
adapter->num_q_vectors = 1;
if (!(adapter->flags & IXGBE_FLAG_MSI_CAPABLE))
return;
err = pci_enable_msi(adapter->pdev);
if (err) {
netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
"Unable to allocate MSI interrupt, "
"falling back to legacy. Error: %d\n", err);
return;
}
adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
}
/**
* ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
* @adapter: board private structure to initialize
*
* Attempt to configure the interrupts using the best available
* capabilities of the hardware and the kernel.
**/
static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
int err = 0;
int vector, v_budget;
/*
* It's easy to be greedy for MSI-X vectors, but it really
* doesn't do us much good if we have a lot more vectors
* than CPU's. So let's be conservative and only ask for
* (roughly) the same number of vectors as there are CPU's.
* The default is to use pairs of vectors.
*/
v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
v_budget = min_t(int, v_budget, num_online_cpus());
v_budget += NON_Q_VECTORS;
/*
* At the same time, hardware can only support a maximum of
* hw.mac->max_msix_vectors vectors. With features
* such as RSS and VMDq, we can easily surpass the number of Rx and Tx
* descriptor queues supported by our device. Thus, we cap it off in
* those rare cases where the cpu count also exceeds our vector limit.
*/
v_budget = min_t(int, v_budget, hw->mac.max_msix_vectors);
/* A failure in MSI-X entry allocation isn't fatal, but it does
* mean we disable MSI-X capabilities of the adapter. */
adapter->msix_entries = kcalloc(v_budget,
sizeof(struct msix_entry), GFP_KERNEL);
if (adapter->msix_entries) {
for (vector = 0; vector < v_budget; vector++)
adapter->msix_entries[vector].entry = vector;
ixgbe_acquire_msix_vectors(adapter, v_budget);
if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
goto out;
}
adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
e_err(probe,
"ATR is not supported while multiple "
"queues are disabled. Disabling Flow Director\n");
}
adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
adapter->atr_sample_rate = 0;
if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
ixgbe_disable_sriov(adapter);
err = ixgbe_set_num_queues(adapter);
if (err)
return err;
err = pci_enable_msi(adapter->pdev);
if (!err) {
adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
} else {
netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
"Unable to allocate MSI interrupt, "
"falling back to legacy. Error: %d\n", err);
/* reset err */
err = 0;
}
out:
return err;
}
