ddp_pool->pool = NULL;
}
-static void ixgbe_fcoe_ddp_pools_free(struct ixgbe_fcoe *fcoe)
-{
- unsigned int cpu;
-
- for_each_possible_cpu(cpu)
- ixgbe_fcoe_dma_pool_free(fcoe, cpu);
-
- free_percpu(fcoe->ddp_pool);
- fcoe->ddp_pool = NULL;
-}
-
static int ixgbe_fcoe_dma_pool_alloc(struct ixgbe_fcoe *fcoe,
struct device *dev,
unsigned int cpu)
return 0;
}
-static void ixgbe_fcoe_ddp_pools_alloc(struct ixgbe_adapter *adapter)
-{
- struct ixgbe_fcoe *fcoe = &adapter->fcoe;
- struct device *dev = &adapter->pdev->dev;
- unsigned int cpu;
-
- fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool);
- if (!fcoe->ddp_pool)
- return;
-
- /* allocate pci pool for each cpu */
- for_each_possible_cpu(cpu)
- ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu);
-}
-
/**
* ixgbe_configure_fcoe - configures registers for fcoe at start
* @adapter: ptr to ixgbe adapter
*/
void ixgbe_configure_fcoe(struct ixgbe_adapter *adapter)
{
- int i, fcoe_q, fcoe_i;
+ struct ixgbe_ring_feature *fcoe = &adapter->ring_feature[RING_F_FCOE];
struct ixgbe_hw *hw = &adapter->hw;
- struct ixgbe_fcoe *fcoe = &adapter->fcoe;
- struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
+ int i, fcoe_q, fcoe_i;
u32 etqf;
- if (!fcoe->ddp_pool) {
- spin_lock_init(&fcoe->lock);
-
- ixgbe_fcoe_ddp_pools_alloc(adapter);
- if (!fcoe->ddp_pool) {
- e_err(drv, "failed to alloc percpu fcoe DDP pools\n");
- return;
- }
-
- /* Extra buffer to be shared by all DDPs for HW work around */
- fcoe->extra_ddp_buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_ATOMIC);
- if (fcoe->extra_ddp_buffer == NULL) {
- e_err(drv, "failed to allocated extra DDP buffer\n");
- goto out_ddp_pools;
- }
-
- fcoe->extra_ddp_buffer_dma =
- dma_map_single(&adapter->pdev->dev,
- fcoe->extra_ddp_buffer,
- IXGBE_FCBUFF_MIN,
- DMA_FROM_DEVICE);
- if (dma_mapping_error(&adapter->pdev->dev,
- fcoe->extra_ddp_buffer_dma)) {
- e_err(drv, "failed to map extra DDP buffer\n");
- goto out_extra_ddp_buffer;
- }
- }
+ /* leave registers unconfigued if FCoE is disabled */
+ if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
+ return;
/* Enable L2 EtherType filter for FCoE, necessary for FCoE Rx CRC */
etqf = ETH_P_FCOE | IXGBE_ETQF_FCOE | IXGBE_ETQF_FILTER_EN;
/* Use one or more Rx queues for FCoE by redirection table */
for (i = 0; i < IXGBE_FCRETA_SIZE; i++) {
- fcoe_i = f->offset + (i % f->indices);
+ fcoe_i = fcoe->offset + (i % fcoe->indices);
fcoe_i &= IXGBE_FCRETA_ENTRY_MASK;
fcoe_q = adapter->rx_ring[fcoe_i]->reg_idx;
IXGBE_WRITE_REG(hw, IXGBE_FCRETA(i), fcoe_q);
IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FIP), etqf);
/* Send FIP frames to the first FCoE queue */
- fcoe_q = adapter->rx_ring[f->offset]->reg_idx;
+ fcoe_q = adapter->rx_ring[fcoe->offset]->reg_idx;
IXGBE_WRITE_REG(hw, IXGBE_ETQS(IXGBE_ETQF_FILTER_FIP),
IXGBE_ETQS_QUEUE_EN |
(fcoe_q << IXGBE_ETQS_RX_QUEUE_SHIFT));
IXGBE_WRITE_REG(hw, IXGBE_FCRXCTRL,
IXGBE_FCRXCTRL_FCCRCBO |
(FC_FCOE_VER << IXGBE_FCRXCTRL_FCOEVER_SHIFT));
-
- return;
-out_extra_ddp_buffer:
- kfree(fcoe->extra_ddp_buffer);
-out_ddp_pools:
- ixgbe_fcoe_ddp_pools_free(fcoe);
}
/**
- * ixgbe_cleanup_fcoe - release all fcoe ddp context resources
+ * ixgbe_free_fcoe_ddp_resources - release all fcoe ddp context resources
* @adapter : ixgbe adapter
*
* Cleans up outstanding ddp context resources
*
* Returns : none
*/
-void ixgbe_cleanup_fcoe(struct ixgbe_adapter *adapter)
+void ixgbe_free_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
{
- int i;
struct ixgbe_fcoe *fcoe = &adapter->fcoe;
+ int cpu, i;
+ /* do nothing if no DDP pools were allocated */
if (!fcoe->ddp_pool)
return;
for (i = 0; i < IXGBE_FCOE_DDP_MAX; i++)
ixgbe_fcoe_ddp_put(adapter->netdev, i);
+ for_each_possible_cpu(cpu)
+ ixgbe_fcoe_dma_pool_free(fcoe, cpu);
+
dma_unmap_single(&adapter->pdev->dev,
fcoe->extra_ddp_buffer_dma,
IXGBE_FCBUFF_MIN,
DMA_FROM_DEVICE);
kfree(fcoe->extra_ddp_buffer);
- ixgbe_fcoe_ddp_pools_free(fcoe);
+ fcoe->extra_ddp_buffer = NULL;
+ fcoe->extra_ddp_buffer_dma = 0;
+}
+
+/**
+ * ixgbe_setup_fcoe_ddp_resources - setup all fcoe ddp context resources
+ * @adapter: ixgbe adapter
+ *
+ * Sets up ddp context resouces
+ *
+ * Returns : 0 indicates success or -EINVAL on failure
+ */
+int ixgbe_setup_fcoe_ddp_resources(struct ixgbe_adapter *adapter)
+{
+ struct ixgbe_fcoe *fcoe = &adapter->fcoe;
+ struct device *dev = &adapter->pdev->dev;
+ void *buffer;
+ dma_addr_t dma;
+ unsigned int cpu;
+
+ /* do nothing if no DDP pools were allocated */
+ if (!fcoe->ddp_pool)
+ return 0;
+
+ /* Extra buffer to be shared by all DDPs for HW work around */
+ buffer = kmalloc(IXGBE_FCBUFF_MIN, GFP_ATOMIC);
+ if (!buffer) {
+ e_err(drv, "failed to allocate extra DDP buffer\n");
+ return -ENOMEM;
+ }
+
+ dma = dma_map_single(dev, buffer, IXGBE_FCBUFF_MIN, DMA_FROM_DEVICE);
+ if (dma_mapping_error(dev, dma)) {
+ e_err(drv, "failed to map extra DDP buffer\n");
+ kfree(buffer);
+ return -ENOMEM;
+ }
+
+ fcoe->extra_ddp_buffer = buffer;
+ fcoe->extra_ddp_buffer_dma = dma;
+
+ /* allocate pci pool for each cpu */
+ for_each_possible_cpu(cpu) {
+ int err = ixgbe_fcoe_dma_pool_alloc(fcoe, dev, cpu);
+ if (!err)
+ continue;
+
+ e_err(drv, "failed to alloc DDP pool on cpu:%d\n", cpu);
+ ixgbe_free_fcoe_ddp_resources(adapter);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int ixgbe_fcoe_ddp_enable(struct ixgbe_adapter *adapter)
+{
+ struct ixgbe_fcoe *fcoe = &adapter->fcoe;
+
+ if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
+ return -EINVAL;
+
+ fcoe->ddp_pool = alloc_percpu(struct ixgbe_fcoe_ddp_pool);
+
+ if (!fcoe->ddp_pool) {
+ e_err(drv, "failed to allocate percpu DDP resources\n");
+ return -ENOMEM;
+ }
+
+ adapter->netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
+
+ return 0;
+}
+
+static void ixgbe_fcoe_ddp_disable(struct ixgbe_adapter *adapter)
+{
+ struct ixgbe_fcoe *fcoe = &adapter->fcoe;
+
+ adapter->netdev->fcoe_ddp_xid = 0;
+
+ if (!fcoe->ddp_pool)
+ return;
+
+ free_percpu(fcoe->ddp_pool);
+ fcoe->ddp_pool = NULL;
}
/**
*/
int ixgbe_fcoe_enable(struct net_device *netdev)
{
- int rc = -EINVAL;
struct ixgbe_adapter *adapter = netdev_priv(netdev);
struct ixgbe_fcoe *fcoe = &adapter->fcoe;
+ atomic_inc(&fcoe->refcnt);
if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
- goto out_enable;
+ return -EINVAL;
- atomic_inc(&fcoe->refcnt);
if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
- goto out_enable;
+ return -EINVAL;
e_info(drv, "Enabling FCoE offload features.\n");
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
- ixgbe_clear_interrupt_scheme(adapter);
+ /* Allocate per CPU memory to track DDP pools */
+ ixgbe_fcoe_ddp_enable(adapter);
+ /* enable FCoE and notify stack */
adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
- adapter->ring_feature[RING_F_FCOE].limit = IXGBE_FCRETA_SIZE;
- netdev->features |= NETIF_F_FCOE_CRC;
- netdev->features |= NETIF_F_FSO;
- netdev->features |= NETIF_F_FCOE_MTU;
- netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
+ netdev->features |= NETIF_F_FSO | NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU;
+ netdev_features_change(netdev);
+ /* release existing queues and reallocate them */
+ ixgbe_clear_interrupt_scheme(adapter);
ixgbe_init_interrupt_scheme(adapter);
- netdev_features_change(netdev);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
- rc = 0;
-out_enable:
- return rc;
+ return 0;
}
/**
*/
int ixgbe_fcoe_disable(struct net_device *netdev)
{
- int rc = -EINVAL;
struct ixgbe_adapter *adapter = netdev_priv(netdev);
- struct ixgbe_fcoe *fcoe = &adapter->fcoe;
- if (!(adapter->flags & IXGBE_FLAG_FCOE_CAPABLE))
- goto out_disable;
+ if (!atomic_dec_and_test(&adapter->fcoe.refcnt))
+ return -EINVAL;
if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
- goto out_disable;
-
- if (!atomic_dec_and_test(&fcoe->refcnt))
- goto out_disable;
+ return -EINVAL;
e_info(drv, "Disabling FCoE offload features.\n");
- netdev->features &= ~NETIF_F_FCOE_CRC;
- netdev->features &= ~NETIF_F_FSO;
- netdev->features &= ~NETIF_F_FCOE_MTU;
- netdev->fcoe_ddp_xid = 0;
- netdev_features_change(netdev);
-
if (netif_running(netdev))
netdev->netdev_ops->ndo_stop(netdev);
- ixgbe_clear_interrupt_scheme(adapter);
+ /* Free per CPU memory to track DDP pools */
+ ixgbe_fcoe_ddp_disable(adapter);
+
+ /* disable FCoE and notify stack */
adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
- adapter->ring_feature[RING_F_FCOE].indices = 0;
- ixgbe_cleanup_fcoe(adapter);
+ netdev->features &= ~(NETIF_F_FCOE_CRC |
+ NETIF_F_FSO |
+ NETIF_F_FCOE_MTU);
+
+ netdev_features_change(netdev);
+
+ /* release existing queues and reallocate them */
+ ixgbe_clear_interrupt_scheme(adapter);
ixgbe_init_interrupt_scheme(adapter);
if (netif_running(netdev))
netdev->netdev_ops->ndo_open(netdev);
- rc = 0;
-out_disable:
- return rc;
+ return 0;
}
/**
projects / users / hch / configfs.git / commitdiff