kernel: Remove support for kernel 3.18

No target is using kernel 3.18 anymore, remove all the generic
support for kernel 3.18.

The removed packages are depending on kernel 3.18 only and are not used on
any recent kernel.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 0 insertions, 267 deletions

diff --git a/target/linux/generic/pending-3.18/077-03-bgmac-implement-scatter-gather-support.patch b/target/linux/generic/pending-3.18/077-03-bgmac-implement-scatter-gather-support.patch
deleted file mode 100644
index 642dd2ad73..0000000000
--- a/target/linux/generic/pending-3.18/077-03-bgmac-implement-scatter-gather-support.patch
+++ /dev/null
@@ -1,267 +0,0 @@
-From: Felix Fietkau <nbd@nbd.name>
-Date: Mon, 23 Mar 2015 02:42:26 +0100
-Subject: [PATCH] bgmac: implement scatter/gather support
-
-Always use software checksumming, since the hardware does not have any
-checksum offload support.
-This significantly improves local TCP tx performance.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/drivers/net/ethernet/broadcom/bgmac.c
-+++ b/drivers/net/ethernet/broadcom/bgmac.c
-@@ -115,53 +115,91 @@ static void bgmac_dma_tx_enable(struct b
- 	bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, ctl);
- }
- 
-+static void
-+bgmac_dma_tx_add_buf(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
-+		     int i, int len, u32 ctl0)
-+{
-+	struct bgmac_slot_info *slot;
-+	struct bgmac_dma_desc *dma_desc;
-+	u32 ctl1;
-+
-+	if (i == ring->num_slots - 1)
-+		ctl0 |= BGMAC_DESC_CTL0_EOT;
-+
-+	ctl1 = len & BGMAC_DESC_CTL1_LEN;
-+
-+	slot = &ring->slots[i];
-+	dma_desc = &ring->cpu_base[i];
-+	dma_desc->addr_low = cpu_to_le32(lower_32_bits(slot->dma_addr));
-+	dma_desc->addr_high = cpu_to_le32(upper_32_bits(slot->dma_addr));
-+	dma_desc->ctl0 = cpu_to_le32(ctl0);
-+	dma_desc->ctl1 = cpu_to_le32(ctl1);
-+}
-+
- static netdev_tx_t bgmac_dma_tx_add(struct bgmac *bgmac,
- 				    struct bgmac_dma_ring *ring,
- 				    struct sk_buff *skb)
- {
- 	struct device *dma_dev = bgmac->core->dma_dev;
- 	struct net_device *net_dev = bgmac->net_dev;
--	struct bgmac_dma_desc *dma_desc;
--	struct bgmac_slot_info *slot;
--	u32 ctl0, ctl1;
-+	struct bgmac_slot_info *slot = &ring->slots[ring->end];
- 	int free_slots;
-+	int nr_frags;
-+	u32 flags;
-+	int index = ring->end;
-+	int i;
- 
- 	if (skb->len > BGMAC_DESC_CTL1_LEN) {
- 		bgmac_err(bgmac, "Too long skb (%d)\n", skb->len);
--		goto err_stop_drop;
-+		goto err_drop;
- 	}
- 
-+	if (skb->ip_summed == CHECKSUM_PARTIAL)
-+		skb_checksum_help(skb);
-+
-+	nr_frags = skb_shinfo(skb)->nr_frags;
-+
- 	if (ring->start <= ring->end)
- 		free_slots = ring->start - ring->end + BGMAC_TX_RING_SLOTS;
- 	else
- 		free_slots = ring->start - ring->end;
--	if (free_slots == 1) {
-+
-+	if (free_slots <= nr_frags + 1) {
- 		bgmac_err(bgmac, "TX ring is full, queue should be stopped!\n");
- 		netif_stop_queue(net_dev);
- 		return NETDEV_TX_BUSY;
- 	}
- 
--	slot = &ring->slots[ring->end];
--	slot->skb = skb;
--	slot->dma_addr = dma_map_single(dma_dev, skb->data, skb->len,
-+	slot->dma_addr = dma_map_single(dma_dev, skb->data, skb_headlen(skb),
- 					DMA_TO_DEVICE);
--	if (dma_mapping_error(dma_dev, slot->dma_addr)) {
--		bgmac_err(bgmac, "Mapping error of skb on ring 0x%X\n",
--			  ring->mmio_base);
--		goto err_stop_drop;
--	}
-+	if (unlikely(dma_mapping_error(dma_dev, slot->dma_addr)))
-+		goto err_dma_head;
- 
--	ctl0 = BGMAC_DESC_CTL0_IOC | BGMAC_DESC_CTL0_SOF | BGMAC_DESC_CTL0_EOF;
--	if (ring->end == ring->num_slots - 1)
--		ctl0 |= BGMAC_DESC_CTL0_EOT;
--	ctl1 = skb->len & BGMAC_DESC_CTL1_LEN;
-+	flags = BGMAC_DESC_CTL0_SOF;
-+	if (!nr_frags)
-+		flags |= BGMAC_DESC_CTL0_EOF | BGMAC_DESC_CTL0_IOC;
-+
-+	bgmac_dma_tx_add_buf(bgmac, ring, index, skb_headlen(skb), flags);
-+	flags = 0;
-+
-+	for (i = 0; i < nr_frags; i++) {
-+		struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
-+		int len = skb_frag_size(frag);
-+
-+		index = (index + 1) % BGMAC_TX_RING_SLOTS;
-+		slot = &ring->slots[index];
-+		slot->dma_addr = skb_frag_dma_map(dma_dev, frag, 0,
-+						  len, DMA_TO_DEVICE);
-+		if (unlikely(dma_mapping_error(dma_dev, slot->dma_addr)))
-+			goto err_dma;
- 
--	dma_desc = ring->cpu_base;
--	dma_desc += ring->end;
--	dma_desc->addr_low = cpu_to_le32(lower_32_bits(slot->dma_addr));
--	dma_desc->addr_high = cpu_to_le32(upper_32_bits(slot->dma_addr));
--	dma_desc->ctl0 = cpu_to_le32(ctl0);
--	dma_desc->ctl1 = cpu_to_le32(ctl1);
-+		if (i == nr_frags - 1)
-+			flags |= BGMAC_DESC_CTL0_EOF | BGMAC_DESC_CTL0_IOC;
-+
-+		bgmac_dma_tx_add_buf(bgmac, ring, index, len, flags);
-+	}
-+
-+	slot->skb = skb;
- 
- 	netdev_sent_queue(net_dev, skb->len);
- 
-@@ -170,20 +208,35 @@ static netdev_tx_t bgmac_dma_tx_add(stru
- 	/* Increase ring->end to point empty slot. We tell hardware the first
- 	 * slot it should *not* read.
- 	 */
--	if (++ring->end >= BGMAC_TX_RING_SLOTS)
--		ring->end = 0;
-+	ring->end = (index + 1) % BGMAC_TX_RING_SLOTS;
- 	bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX,
- 		    ring->index_base +
- 		    ring->end * sizeof(struct bgmac_dma_desc));
- 
--	/* Always keep one slot free to allow detecting bugged calls. */
--	if (--free_slots == 1)
-+	free_slots -= nr_frags + 1;
-+	if (free_slots < 8)
- 		netif_stop_queue(net_dev);
- 
- 	return NETDEV_TX_OK;
- 
--err_stop_drop:
--	netif_stop_queue(net_dev);
-+err_dma:
-+	dma_unmap_single(dma_dev, slot->dma_addr, skb_headlen(skb),
-+			 DMA_TO_DEVICE);
-+
-+	while (i > 0) {
-+		int index = (ring->end + i) % BGMAC_TX_RING_SLOTS;
-+		struct bgmac_slot_info *slot = &ring->slots[index];
-+		u32 ctl1 = le32_to_cpu(ring->cpu_base[index].ctl1);
-+		int len = ctl1 & BGMAC_DESC_CTL1_LEN;
-+
-+		dma_unmap_page(dma_dev, slot->dma_addr, len, DMA_TO_DEVICE);
-+	}
-+
-+err_dma_head:
-+	bgmac_err(bgmac, "Mapping error of skb on ring 0x%X\n",
-+		  ring->mmio_base);
-+
-+err_drop:
- 	dev_kfree_skb(skb);
- 	return NETDEV_TX_OK;
- }
-@@ -205,32 +258,45 @@ static void bgmac_dma_tx_free(struct bgm
- 
- 	while (ring->start != empty_slot) {
- 		struct bgmac_slot_info *slot = &ring->slots[ring->start];
-+		u32 ctl1 = le32_to_cpu(ring->cpu_base[ring->start].ctl1);
-+		int len = ctl1 & BGMAC_DESC_CTL1_LEN;
- 
--		if (slot->skb) {
-+		if (!slot->dma_addr) {
-+			bgmac_err(bgmac, "Hardware reported transmission for empty TX ring slot %d! End of ring: %d\n",
-+				  ring->start, ring->end);
-+			goto next;
-+		}
-+
-+		if (ctl1 & BGMAC_DESC_CTL0_SOF)
- 			/* Unmap no longer used buffer */
--			dma_unmap_single(dma_dev, slot->dma_addr,
--					 slot->skb->len, DMA_TO_DEVICE);
--			slot->dma_addr = 0;
-+			dma_unmap_single(dma_dev, slot->dma_addr, len,
-+					 DMA_TO_DEVICE);
-+		else
-+			dma_unmap_page(dma_dev, slot->dma_addr, len,
-+				       DMA_TO_DEVICE);
- 
-+		if (slot->skb) {
- 			bytes_compl += slot->skb->len;
- 			pkts_compl++;
- 
- 			/* Free memory! :) */
- 			dev_kfree_skb(slot->skb);
- 			slot->skb = NULL;
--		} else {
--			bgmac_err(bgmac, "Hardware reported transmission for empty TX ring slot %d! End of ring: %d\n",
--				  ring->start, ring->end);
- 		}
- 
-+next:
-+		slot->dma_addr = 0;
- 		if (++ring->start >= BGMAC_TX_RING_SLOTS)
- 			ring->start = 0;
- 		freed = true;
- 	}
- 
-+	if (!pkts_compl)
-+		return;
-+
- 	netdev_completed_queue(bgmac->net_dev, pkts_compl, bytes_compl);
- 
--	if (freed && netif_queue_stopped(bgmac->net_dev))
-+	if (netif_queue_stopped(bgmac->net_dev))
- 		netif_wake_queue(bgmac->net_dev);
- }
- 
-@@ -439,17 +505,25 @@ static void bgmac_dma_tx_ring_free(struc
- 				   struct bgmac_dma_ring *ring)
- {
- 	struct device *dma_dev = bgmac->core->dma_dev;
-+	struct bgmac_dma_desc *dma_desc = ring->cpu_base;
- 	struct bgmac_slot_info *slot;
- 	int i;
- 
- 	for (i = 0; i < ring->num_slots; i++) {
-+		int len = dma_desc[i].ctl1 & BGMAC_DESC_CTL1_LEN;
-+
- 		slot = &ring->slots[i];
--		if (slot->skb) {
--			if (slot->dma_addr)
--				dma_unmap_single(dma_dev, slot->dma_addr,
--						 slot->skb->len, DMA_TO_DEVICE);
--			dev_kfree_skb(slot->skb);
--		}
-+		dev_kfree_skb(slot->skb);
-+
-+		if (!slot->dma_addr)
-+			continue;
-+
-+		if (slot->skb)
-+			dma_unmap_single(dma_dev, slot->dma_addr,
-+					 len, DMA_TO_DEVICE);
-+		else
-+			dma_unmap_page(dma_dev, slot->dma_addr,
-+				       len, DMA_TO_DEVICE);
- 	}
- }
- 
-@@ -1588,6 +1662,10 @@ static int bgmac_probe(struct bcma_devic
- 		goto err_dma_free;
- 	}
- 
-+	net_dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
-+	net_dev->hw_features = net_dev->features;
-+	net_dev->vlan_features = net_dev->features;
-+
- 	err = register_netdev(bgmac->net_dev);
- 	if (err) {
- 		bgmac_err(bgmac, "Cannot register net device\n");