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Determine max desc block size and compute ring stride

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This commit is contained in:
Alex Forencich 2020-04-21 17:51:02 -07:00
parent a4108ecbf9
commit b62a47df8e
2 changed files with 15 additions and 1 deletions
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2
modules/mqnic/mqnic.h
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@ -276,6 +276,8 @@ struct mqnic_priv {
u32 port_offset;
u32 port_stride;
u32 max_desc_block_size;
u8 __iomem *hw_addr;
u8 __iomem *csr_hw_addr;

14
modules/mqnic/mqnic_netdev.c
View File

@ -400,6 +400,7 @@ int mqnic_init_netdev(struct mqnic_dev *mdev, int port, u8 __iomem *hw_addr)
struct mqnic_priv *priv;
int ret = 0;
int k;
u32 desc_block_size;
ndev = alloc_etherdev_mqs(sizeof(*priv), MQNIC_MAX_TX_RINGS, MQNIC_MAX_RX_RINGS);
if (!ndev)
@ -493,6 +494,17 @@ int mqnic_init_netdev(struct mqnic_dev *mdev, int port, u8 __iomem *hw_addr)
priv->hwts_config.tx_type = HWTSTAMP_TX_OFF;
priv->hwts_config.rx_filter = HWTSTAMP_FILTER_NONE;
// determine desc block size
iowrite32(0xf << 8, hw_addr+priv->tx_queue_offset+MQNIC_QUEUE_ACTIVE_LOG_SIZE_REG);
priv->max_desc_block_size = 1 << ((ioread32(hw_addr+priv->tx_queue_offset+MQNIC_QUEUE_ACTIVE_LOG_SIZE_REG) >> 8) & 0xf);
iowrite32(0, hw_addr+priv->tx_queue_offset+MQNIC_QUEUE_ACTIVE_LOG_SIZE_REG);
dev_info(dev, "Max desc block size: %d", priv->max_desc_block_size);
priv->max_desc_block_size = priv->max_desc_block_size < MQNIC_MAX_FRAGS ? priv->max_desc_block_size : MQNIC_MAX_FRAGS;
desc_block_size = priv->max_desc_block_size < 4 ? priv->max_desc_block_size : 4;
// allocate rings
for (k = 0; k < priv->event_queue_count; k++)
{
@ -505,7 +517,7 @@ int mqnic_init_netdev(struct mqnic_dev *mdev, int port, u8 __iomem *hw_addr)
for (k = 0; k < priv->tx_queue_count; k++)
{
ret = mqnic_create_tx_ring(priv, &priv->tx_ring[k], 1024, MQNIC_DESC_SIZE, k, hw_addr+priv->tx_queue_offset+k*MQNIC_QUEUE_STRIDE); // TODO configure/constant
ret = mqnic_create_tx_ring(priv, &priv->tx_ring[k], 1024, MQNIC_DESC_SIZE*desc_block_size, k, hw_addr+priv->tx_queue_offset+k*MQNIC_QUEUE_STRIDE); // TODO configure/constant
if (ret)
{
goto fail;