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bgmac: separate RX descriptor setup code into a new function

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This cleans code a bit and will be useful when allocating buffers in
other places (like RX path, to avoid skb_copy_from_linear_data_offset).

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rafał Miłecki 2013-10-28 14:40:29 +01:00 • committed by David S. Miller
parent cdfb97bc01
commit d549c76bcc
1 changed files with 22 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
drivers/net/ethernet/broadcom/bgmac.c
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@ -277,6 +277,26 @@ static int bgmac_dma_rx_skb_for_slot(struct bgmac *bgmac,
return 0; return 0;
} }
static void bgmac_dma_rx_setup_desc(struct bgmac *bgmac,
struct bgmac_dma_ring *ring, int desc_idx)
{
struct bgmac_dma_desc *dma_desc = ring->cpu_base + desc_idx;
u32 ctl0 = 0, ctl1 = 0;
if (desc_idx == ring->num_slots - 1)
ctl0 |= BGMAC_DESC_CTL0_EOT;
ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN;
/* Is there any BGMAC device that requires extension? */
/* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) &
* B43_DMA64_DCTL1_ADDREXT_MASK;
*/
dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[desc_idx].dma_addr));
dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[desc_idx].dma_addr));
dma_desc->ctl0 = cpu_to_le32(ctl0);
dma_desc->ctl1 = cpu_to_le32(ctl1);
}
static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring, static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
int weight) int weight)
{ {
@ -503,8 +523,6 @@ err_dma_free:
static void bgmac_dma_init(struct bgmac *bgmac) static void bgmac_dma_init(struct bgmac *bgmac)
{ {
struct bgmac_dma_ring *ring; struct bgmac_dma_ring *ring;
struct bgmac_dma_desc *dma_desc;
u32 ctl0, ctl1;
int i; int i;
for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
@ -537,23 +555,8 @@ static void bgmac_dma_init(struct bgmac *bgmac)
if (ring->unaligned) if (ring->unaligned)
bgmac_dma_rx_enable(bgmac, ring); bgmac_dma_rx_enable(bgmac, ring);
for (j = 0, dma_desc = ring->cpu_base; j < ring->num_slots; for (j = 0; j < ring->num_slots; j++)
j++, dma_desc++) { bgmac_dma_rx_setup_desc(bgmac, ring, j);
ctl0 = ctl1 = 0;
if (j == ring->num_slots - 1)
ctl0 |= BGMAC_DESC_CTL0_EOT;
ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN;
/* Is there any BGMAC device that requires extension? */
/* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) &
* B43_DMA64_DCTL1_ADDREXT_MASK;
*/
dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[j].dma_addr));
dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[j].dma_addr));
dma_desc->ctl0 = cpu_to_le32(ctl0);
dma_desc->ctl1 = cpu_to_le32(ctl1);
}
bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX, bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
ring->index_base + ring->index_base +