132 lines
4.1 KiB
Diff
132 lines
4.1 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Sun, 12 Apr 2015 23:28:38 +0200
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Subject: [PATCH] bgmac: drop ring->num_slots
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The ring size is always known at compile time, so make the code a bit
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more efficient
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/ethernet/broadcom/bgmac.c
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+++ b/drivers/net/ethernet/broadcom/bgmac.c
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@@ -123,7 +123,7 @@ bgmac_dma_tx_add_buf(struct bgmac *bgmac
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struct bgmac_dma_desc *dma_desc;
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u32 ctl1;
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- if (i == ring->num_slots - 1)
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+ if (i == BGMAC_TX_RING_SLOTS - 1)
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ctl0 |= BGMAC_DESC_CTL0_EOT;
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ctl1 = len & BGMAC_DESC_CTL1_LEN;
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@@ -382,7 +382,7 @@ static void bgmac_dma_rx_setup_desc(stru
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struct bgmac_dma_desc *dma_desc = ring->cpu_base + desc_idx;
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u32 ctl0 = 0, ctl1 = 0;
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- if (desc_idx == ring->num_slots - 1)
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+ if (desc_idx == BGMAC_RX_RING_SLOTS - 1)
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ctl0 |= BGMAC_DESC_CTL0_EOT;
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ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN;
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/* Is there any BGMAC device that requires extension? */
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@@ -521,7 +521,7 @@ static void bgmac_dma_tx_ring_free(struc
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struct bgmac_slot_info *slot;
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int i;
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- for (i = 0; i < ring->num_slots; i++) {
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+ for (i = 0; i < BGMAC_TX_RING_SLOTS; i++) {
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int len = dma_desc[i].ctl1 & BGMAC_DESC_CTL1_LEN;
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slot = &ring->slots[i];
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@@ -546,7 +546,7 @@ static void bgmac_dma_rx_ring_free(struc
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struct bgmac_slot_info *slot;
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int i;
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- for (i = 0; i < ring->num_slots; i++) {
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+ for (i = 0; i < BGMAC_RX_RING_SLOTS; i++) {
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slot = &ring->slots[i];
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if (!slot->dma_addr)
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continue;
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@@ -560,7 +560,8 @@ static void bgmac_dma_rx_ring_free(struc
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}
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static void bgmac_dma_ring_desc_free(struct bgmac *bgmac,
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- struct bgmac_dma_ring *ring)
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+ struct bgmac_dma_ring *ring,
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+ int num_slots)
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{
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struct device *dma_dev = bgmac->core->dma_dev;
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int size;
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@@ -569,7 +570,7 @@ static void bgmac_dma_ring_desc_free(str
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return;
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/* Free ring of descriptors */
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- size = ring->num_slots * sizeof(struct bgmac_dma_desc);
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+ size = num_slots * sizeof(struct bgmac_dma_desc);
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dma_free_coherent(dma_dev, size, ring->cpu_base,
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ring->dma_base);
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}
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@@ -590,10 +591,12 @@ static void bgmac_dma_free(struct bgmac
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int i;
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for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
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- bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i]);
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+ bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i],
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+ BGMAC_TX_RING_SLOTS);
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for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
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- bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i]);
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+ bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i],
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+ BGMAC_RX_RING_SLOTS);
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}
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static int bgmac_dma_alloc(struct bgmac *bgmac)
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@@ -616,11 +619,10 @@ static int bgmac_dma_alloc(struct bgmac
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for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
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ring = &bgmac->tx_ring[i];
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- ring->num_slots = BGMAC_TX_RING_SLOTS;
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ring->mmio_base = ring_base[i];
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/* Alloc ring of descriptors */
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- size = ring->num_slots * sizeof(struct bgmac_dma_desc);
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+ size = BGMAC_TX_RING_SLOTS * sizeof(struct bgmac_dma_desc);
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ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
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&ring->dma_base,
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GFP_KERNEL);
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@@ -642,11 +644,10 @@ static int bgmac_dma_alloc(struct bgmac
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for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
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ring = &bgmac->rx_ring[i];
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- ring->num_slots = BGMAC_RX_RING_SLOTS;
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ring->mmio_base = ring_base[i];
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/* Alloc ring of descriptors */
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- size = ring->num_slots * sizeof(struct bgmac_dma_desc);
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+ size = BGMAC_RX_RING_SLOTS * sizeof(struct bgmac_dma_desc);
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ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
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&ring->dma_base,
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GFP_KERNEL);
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@@ -709,7 +710,7 @@ static int bgmac_dma_init(struct bgmac *
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ring->start = 0;
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ring->end = 0;
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- for (j = 0; j < ring->num_slots; j++) {
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+ for (j = 0; j < BGMAC_RX_RING_SLOTS; j++) {
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err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
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if (err)
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goto error;
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--- a/drivers/net/ethernet/broadcom/bgmac.h
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+++ b/drivers/net/ethernet/broadcom/bgmac.h
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@@ -419,11 +419,10 @@ struct bgmac_dma_ring {
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u32 start;
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u32 end;
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- u16 num_slots;
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- u16 mmio_base;
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struct bgmac_dma_desc *cpu_base;
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dma_addr_t dma_base;
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u32 index_base; /* Used for unaligned rings only, otherwise 0 */
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+ u16 mmio_base;
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bool unaligned;
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struct bgmac_slot_info slots[BGMAC_RX_RING_SLOTS];
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