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Diffstat (limited to 'target/linux/generic/patches-3.12/770-bgmac-backport.patch')
-rw-r--r--target/linux/generic/patches-3.12/770-bgmac-backport.patch237
1 files changed, 237 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.12/770-bgmac-backport.patch b/target/linux/generic/patches-3.12/770-bgmac-backport.patch
new file mode 100644
index 0000000000..68489f5c7b
--- /dev/null
+++ b/target/linux/generic/patches-3.12/770-bgmac-backport.patch
@@ -0,0 +1,237 @@
+patches for bgmac backported from net-next/master
+
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -149,6 +149,8 @@ static netdev_tx_t bgmac_dma_tx_add(stru
+ dma_desc->ctl0 = cpu_to_le32(ctl0);
+ dma_desc->ctl1 = cpu_to_le32(ctl1);
+
++ netdev_sent_queue(net_dev, skb->len);
++
+ wmb();
+
+ /* Increase ring->end to point empty slot. We tell hardware the first
+@@ -178,6 +180,7 @@ static void bgmac_dma_tx_free(struct bgm
+ struct device *dma_dev = bgmac->core->dma_dev;
+ int empty_slot;
+ bool freed = false;
++ unsigned bytes_compl = 0, pkts_compl = 0;
+
+ /* The last slot that hardware didn't consume yet */
+ empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
+@@ -195,6 +198,9 @@ static void bgmac_dma_tx_free(struct bgm
+ slot->skb->len, DMA_TO_DEVICE);
+ slot->dma_addr = 0;
+
++ bytes_compl += slot->skb->len;
++ pkts_compl++;
++
+ /* Free memory! :) */
+ dev_kfree_skb(slot->skb);
+ slot->skb = NULL;
+@@ -208,6 +214,8 @@ static void bgmac_dma_tx_free(struct bgm
+ freed = true;
+ }
+
++ netdev_completed_queue(bgmac->net_dev, pkts_compl, bytes_compl);
++
+ if (freed && netif_queue_stopped(bgmac->net_dev))
+ netif_wake_queue(bgmac->net_dev);
+ }
+@@ -244,31 +252,59 @@ static int bgmac_dma_rx_skb_for_slot(str
+ struct bgmac_slot_info *slot)
+ {
+ struct device *dma_dev = bgmac->core->dma_dev;
++ struct sk_buff *skb;
++ dma_addr_t dma_addr;
+ struct bgmac_rx_header *rx;
+
+ /* Alloc skb */
+- slot->skb = netdev_alloc_skb(bgmac->net_dev, BGMAC_RX_BUF_SIZE);
+- if (!slot->skb)
++ skb = netdev_alloc_skb(bgmac->net_dev, BGMAC_RX_BUF_SIZE);
++ if (!skb)
+ return -ENOMEM;
+
+ /* Poison - if everything goes fine, hardware will overwrite it */
+- rx = (struct bgmac_rx_header *)slot->skb->data;
++ rx = (struct bgmac_rx_header *)skb->data;
+ rx->len = cpu_to_le16(0xdead);
+ rx->flags = cpu_to_le16(0xbeef);
+
+ /* Map skb for the DMA */
+- slot->dma_addr = dma_map_single(dma_dev, slot->skb->data,
+- BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
+- if (dma_mapping_error(dma_dev, slot->dma_addr)) {
++ dma_addr = dma_map_single(dma_dev, skb->data,
++ BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
++ if (dma_mapping_error(dma_dev, dma_addr)) {
+ bgmac_err(bgmac, "DMA mapping error\n");
++ dev_kfree_skb(skb);
+ return -ENOMEM;
+ }
++
++ /* Update the slot */
++ slot->skb = skb;
++ slot->dma_addr = dma_addr;
++
+ if (slot->dma_addr & 0xC0000000)
+ bgmac_warn(bgmac, "DMA address using 0xC0000000 bit(s), it may need translation trick\n");
+
+ 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,
+ int weight)
+ {
+@@ -287,7 +323,6 @@ static int bgmac_dma_rx_read(struct bgma
+ struct device *dma_dev = bgmac->core->dma_dev;
+ struct bgmac_slot_info *slot = &ring->slots[ring->start];
+ struct sk_buff *skb = slot->skb;
+- struct sk_buff *new_skb;
+ struct bgmac_rx_header *rx;
+ u16 len, flags;
+
+@@ -300,38 +335,51 @@ static int bgmac_dma_rx_read(struct bgma
+ len = le16_to_cpu(rx->len);
+ flags = le16_to_cpu(rx->flags);
+
+- /* Check for poison and drop or pass the packet */
+- if (len == 0xdead && flags == 0xbeef) {
+- bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",
+- ring->start);
+- } else {
++ do {
++ dma_addr_t old_dma_addr = slot->dma_addr;
++ int err;
++
++ /* Check for poison and drop or pass the packet */
++ if (len == 0xdead && flags == 0xbeef) {
++ bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",
++ ring->start);
++ dma_sync_single_for_device(dma_dev,
++ slot->dma_addr,
++ BGMAC_RX_BUF_SIZE,
++ DMA_FROM_DEVICE);
++ break;
++ }
++
+ /* Omit CRC. */
+ len -= ETH_FCS_LEN;
+
+- new_skb = netdev_alloc_skb_ip_align(bgmac->net_dev, len);
+- if (new_skb) {
+- skb_put(new_skb, len);
+- skb_copy_from_linear_data_offset(skb, BGMAC_RX_FRAME_OFFSET,
+- new_skb->data,
+- len);
+- skb_checksum_none_assert(skb);
+- new_skb->protocol =
+- eth_type_trans(new_skb, bgmac->net_dev);
+- netif_receive_skb(new_skb);
+- handled++;
+- } else {
+- bgmac->net_dev->stats.rx_dropped++;
+- bgmac_err(bgmac, "Allocation of skb for copying packet failed!\n");
++ /* Prepare new skb as replacement */
++ err = bgmac_dma_rx_skb_for_slot(bgmac, slot);
++ if (err) {
++ /* Poison the old skb */
++ rx->len = cpu_to_le16(0xdead);
++ rx->flags = cpu_to_le16(0xbeef);
++
++ dma_sync_single_for_device(dma_dev,
++ slot->dma_addr,
++ BGMAC_RX_BUF_SIZE,
++ DMA_FROM_DEVICE);
++ break;
+ }
++ bgmac_dma_rx_setup_desc(bgmac, ring, ring->start);
+
+- /* Poison the old skb */
+- rx->len = cpu_to_le16(0xdead);
+- rx->flags = cpu_to_le16(0xbeef);
+- }
+-
+- /* Make it back accessible to the hardware */
+- dma_sync_single_for_device(dma_dev, slot->dma_addr,
+- BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
++ /* Unmap old skb, we'll pass it to the netfif */
++ dma_unmap_single(dma_dev, old_dma_addr,
++ BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
++
++ skb_put(skb, BGMAC_RX_FRAME_OFFSET + len);
++ skb_pull(skb, BGMAC_RX_FRAME_OFFSET);
++
++ skb_checksum_none_assert(skb);
++ skb->protocol = eth_type_trans(skb, bgmac->net_dev);
++ netif_receive_skb(skb);
++ handled++;
++ } while (0);
+
+ if (++ring->start >= BGMAC_RX_RING_SLOTS)
+ ring->start = 0;
+@@ -495,8 +543,6 @@ err_dma_free:
+ static void bgmac_dma_init(struct bgmac *bgmac)
+ {
+ struct bgmac_dma_ring *ring;
+- struct bgmac_dma_desc *dma_desc;
+- u32 ctl0, ctl1;
+ int i;
+
+ for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
+@@ -529,23 +575,8 @@ static void bgmac_dma_init(struct bgmac
+ if (ring->unaligned)
+ bgmac_dma_rx_enable(bgmac, ring);
+
+- for (j = 0, dma_desc = ring->cpu_base; j < ring->num_slots;
+- j++, dma_desc++) {
+- 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);
+- }
++ for (j = 0; j < ring->num_slots; j++)
++ bgmac_dma_rx_setup_desc(bgmac, ring, j);
+
+ bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
+ ring->index_base +
+@@ -988,6 +1019,8 @@ static void bgmac_chip_reset(struct bgma
+ bgmac_miiconfig(bgmac);
+ bgmac_phy_init(bgmac);
+
++ netdev_reset_queue(bgmac->net_dev);
++
+ bgmac->int_status = 0;
+ }
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 23:42:10 +0000