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ionic: add helpers for accessing buffer info

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These helpers clean up some of the code around DMA mapping
and other buffer references, and will be used in the next
few patches for the XDP support.

Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Brett Creeley <brett.creeley@amd.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2024-02-14 09:59:02 -08:00 committed by David S. Miller
parent c699f35d65
commit 97538c146c
1 changed files with 24 additions and 13 deletions
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37
drivers/net/ethernet/pensando/ionic/ionic_txrx.c
View file

@ -88,6 +88,21 @@ static inline struct netdev_queue *q_to_ndq(struct ionic_queue *q)
return netdev_get_tx_queue(q->lif->netdev, q->index);
}
static void *ionic_rx_buf_va(struct ionic_buf_info *buf_info)
{
return page_address(buf_info->page) + buf_info->page_offset;
}
static dma_addr_t ionic_rx_buf_pa(struct ionic_buf_info *buf_info)
{
return buf_info->dma_addr + buf_info->page_offset;
}
static unsigned int ionic_rx_buf_size(struct ionic_buf_info *buf_info)
{
return min_t(u32, IONIC_MAX_BUF_LEN, IONIC_PAGE_SIZE - buf_info->page_offset);
}
static int ionic_rx_page_alloc(struct ionic_queue *q,
struct ionic_buf_info *buf_info)
{
@ -207,12 +222,11 @@ static struct sk_buff *ionic_rx_frags(struct ionic_queue *q,
return NULL;
}
frag_len = min_t(u16, len, min_t(u32, IONIC_MAX_BUF_LEN,
IONIC_PAGE_SIZE - buf_info->page_offset));
frag_len = min_t(u16, len, ionic_rx_buf_size(buf_info));
len -= frag_len;
dma_sync_single_for_cpu(dev,
buf_info->dma_addr + buf_info->page_offset,
ionic_rx_buf_pa(buf_info),
frag_len, DMA_FROM_DEVICE);
skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
@ -262,10 +276,10 @@ static struct sk_buff *ionic_rx_copybreak(struct ionic_queue *q,
return NULL;
}
dma_sync_single_for_cpu(dev, buf_info->dma_addr + buf_info->page_offset,
dma_sync_single_for_cpu(dev, ionic_rx_buf_pa(buf_info),
len, DMA_FROM_DEVICE);
skb_copy_to_linear_data(skb, page_address(buf_info->page) + buf_info->page_offset, len);
dma_sync_single_for_device(dev, buf_info->dma_addr + buf_info->page_offset,
skb_copy_to_linear_data(skb, ionic_rx_buf_va(buf_info), len);
dma_sync_single_for_device(dev, ionic_rx_buf_pa(buf_info),
len, DMA_FROM_DEVICE);
skb_put(skb, len);
@ -452,9 +466,8 @@ void ionic_rx_fill(struct ionic_queue *q)
}
/* fill main descriptor - buf[0] */
desc->addr = cpu_to_le64(buf_info->dma_addr + buf_info->page_offset);
frag_len = min_t(u16, len, min_t(u32, IONIC_MAX_BUF_LEN,
IONIC_PAGE_SIZE - buf_info->page_offset));
desc->addr = cpu_to_le64(ionic_rx_buf_pa(buf_info));
frag_len = min_t(u16, len, ionic_rx_buf_size(buf_info));
desc->len = cpu_to_le16(frag_len);
remain_len -= frag_len;
buf_info++;
@ -472,10 +485,8 @@ void ionic_rx_fill(struct ionic_queue *q)
}
}
sg_elem->addr = cpu_to_le64(buf_info->dma_addr + buf_info->page_offset);
frag_len = min_t(u16, remain_len, min_t(u32, IONIC_MAX_BUF_LEN,
IONIC_PAGE_SIZE -
buf_info->page_offset));
sg_elem->addr = cpu_to_le64(ionic_rx_buf_pa(buf_info));
frag_len = min_t(u16, remain_len, ionic_rx_buf_size(buf_info));
sg_elem->len = cpu_to_le16(frag_len);
remain_len -= frag_len;
buf_info++;