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ibmvnic: Create init and release routines for the bounce buffer

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Move the handling of initialization and releasing the bounce buffer to their
own init and release routines.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nathan Fontenot 2017-03-30 02:49:00 -04:00 committed by David S. Miller
parent f992887c34
commit f0b8c96cbc
1 changed files with 50 additions and 27 deletions
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77
drivers/net/ethernet/ibm/ibmvnic.c
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@ -372,6 +372,50 @@ static void free_rx_pool(struct ibmvnic_adapter *adapter,
pool->rx_buff = NULL;
}
static void release_bounce_buffer(struct ibmvnic_adapter *adapter)
{
struct device *dev = &adapter->vdev->dev;
if (!adapter->bounce_buffer)
return;
if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
dma_unmap_single(dev, adapter->bounce_buffer_dma,
adapter->bounce_buffer_size,
DMA_BIDIRECTIONAL);
adapter->bounce_buffer_dma = DMA_ERROR_CODE;
}
kfree(adapter->bounce_buffer);
adapter->bounce_buffer = NULL;
}
static int init_bounce_buffer(struct net_device *netdev)
{
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
struct device *dev = &adapter->vdev->dev;
char *buf;
int buf_sz;
dma_addr_t map_addr;
buf_sz = (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
buf = kmalloc(adapter->bounce_buffer_size, GFP_KERNEL);
if (!buf)
return -1;
map_addr = dma_map_single(dev, buf, buf_sz, DMA_TO_DEVICE);
if (dma_mapping_error(dev, map_addr)) {
dev_err(dev, "Couldn't map bounce buffer\n");
kfree(buf);
return -1;
}
adapter->bounce_buffer = buf;
adapter->bounce_buffer_size = buf_sz;
adapter->bounce_buffer_dma = map_addr;
return 0;
}
static int ibmvnic_login(struct net_device *netdev)
{
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
@ -500,20 +544,11 @@ static int ibmvnic_open(struct net_device *netdev)
tx_pool->consumer_index = 0;
tx_pool->producer_index = 0;
}
adapter->bounce_buffer_size =
(netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
adapter->bounce_buffer = kmalloc(adapter->bounce_buffer_size,
GFP_KERNEL);
if (!adapter->bounce_buffer)
goto bounce_alloc_failed;
adapter->bounce_buffer_dma = dma_map_single(dev, adapter->bounce_buffer,
adapter->bounce_buffer_size,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
dev_err(dev, "Couldn't map tx bounce buffer\n");
goto bounce_map_failed;
}
rc = init_bounce_buffer(netdev);
if (rc)
goto bounce_init_failed;
replenish_pools(adapter);
/* We're ready to receive frames, enable the sub-crq interrupts and
@ -536,9 +571,7 @@ static int ibmvnic_open(struct net_device *netdev)
return 0;
bounce_map_failed:
kfree(adapter->bounce_buffer);
bounce_alloc_failed:
bounce_init_failed:
i = tx_subcrqs - 1;
kfree(adapter->tx_pool[i].free_map);
tx_fm_alloc_failed:
@ -578,17 +611,7 @@ static void ibmvnic_release_resources(struct ibmvnic_adapter *adapter)
int tx_scrqs, rx_scrqs;
int i;
if (adapter->bounce_buffer) {
if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
dma_unmap_single(&adapter->vdev->dev,
adapter->bounce_buffer_dma,
adapter->bounce_buffer_size,
DMA_BIDIRECTIONAL);
adapter->bounce_buffer_dma = DMA_ERROR_CODE;
}
kfree(adapter->bounce_buffer);
adapter->bounce_buffer = NULL;
}
release_bounce_buffer(adapter);
tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
for (i = 0; i < tx_scrqs; i++) {