Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
 "Another merge window, another set of networking changes.  I've heard
  rumblings that the lightweight tunnels infrastructure has been voted
  networking change of the year.  But what do I know?

   1) Add conntrack support to openvswitch, from Joe Stringer.

   2) Initial support for VRF (Virtual Routing and Forwarding), which
      allows the segmentation of routing paths without using multiple
      devices.  There are some semantic kinks to work out still, but
      this is a reasonably strong foundation.  From David Ahern.

   3) Remove spinlock fro act_bpf fast path, from Alexei Starovoitov.

   4) Ignore route nexthops with a link down state in ipv6, just like
      ipv4.  From Andy Gospodarek.

   5) Remove spinlock from fast path of act_gact and act_mirred, from
      Eric Dumazet.

   6) Document the DSA layer, from Florian Fainelli.

   7) Add netconsole support to bcmgenet, systemport, and DSA.  Also
      from Florian Fainelli.

   8) Add Mellanox Switch Driver and core infrastructure, from Jiri
      Pirko.

   9) Add support for "light weight tunnels", which allow for
      encapsulation and decapsulation without bearing the overhead of a
      full blown netdevice.  From Thomas Graf, Jiri Benc, and a cast of
      others.

  10) Add Identifier Locator Addressing support for ipv6, from Tom
      Herbert.

  11) Support fragmented SKBs in iwlwifi, from Johannes Berg.

  12) Allow perf PMUs to be accessed from eBPF programs, from Kaixu Xia.

  13) Add BQL support to 3c59x driver, from Loganaden Velvindron.

  14) Stop using a zero TX queue length to mean that a device shouldn't
      have a qdisc attached, use an explicit flag instead.  From Phil
      Sutter.

  15) Use generic geneve netdevice infrastructure in openvswitch, from
      Pravin B Shelar.

  16) Add infrastructure to avoid re-forwarding a packet in software
      that was already forwarded by a hardware switch.  From Scott
      Feldman.

  17) Allow AF_PACKET fanout function to be implemented in a bpf
      program, from Willem de Bruijn"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1458 commits)
  netfilter: nf_conntrack: make nf_ct_zone_dflt built-in
  netfilter: nf_dup{4, 6}: fix build error when nf_conntrack disabled
  net: fec: clear receive interrupts before processing a packet
  ipv6: fix exthdrs offload registration in out_rt path
  xen-netback: add support for multicast control
  bgmac: Update fixed_phy_register()
  sock, diag: fix panic in sock_diag_put_filterinfo
  flow_dissector: Use 'const' where possible.
  flow_dissector: Fix function argument ordering dependency
  ixgbe: Resolve "initialized field overwritten" warnings
  ixgbe: Remove bimodal SR-IOV disabling
  ixgbe: Add support for reporting 2.5G link speed
  ixgbe: fix bounds checking in ixgbe_setup_tc for 82598
  ixgbe: support for ethtool set_rxfh
  ixgbe: Avoid needless PHY access on copper phys
  ixgbe: cleanup to use cached mask value
  ixgbe: Remove second instance of lan_id variable
  ixgbe: use kzalloc for allocating one thing
  flow: Move __get_hash_from_flowi{4,6} into flow_dissector.c
  ixgbe: Remove unused PCI bus types
  ...

1 files changed, 104 insertions, 31 deletions

diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c b/drivers/net/wireless/iwlwifi/pcie/tx.c
index 607acb5..a8c8a4a 100644
--- a/drivers/net/wireless/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/tx.c
@@ -219,8 +219,6 @@ static void iwl_pcie_txq_update_byte_cnt_tbl(struct iwl_trans *trans,
 
 	scd_bc_tbl = trans_pcie->scd_bc_tbls.addr;
 
-	WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
-
 	sta_id = tx_cmd->sta_id;
 	sec_ctl = tx_cmd->sec_ctl;
 
@@ -239,6 +237,9 @@ static void iwl_pcie_txq_update_byte_cnt_tbl(struct iwl_trans *trans,
 	if (trans_pcie->bc_table_dword)
 		len = DIV_ROUND_UP(len, 4);
 
+	if (WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX))
+		return;
+
 	bc_ent = cpu_to_le16(len | (sta_id << 12));
 
 	scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
@@ -387,11 +388,18 @@ static void iwl_pcie_tfd_unmap(struct iwl_trans *trans,
 
 	/* first TB is never freed - it's the scratchbuf data */
 
-	for (i = 1; i < num_tbs; i++)
-		dma_unmap_single(trans->dev, iwl_pcie_tfd_tb_get_addr(tfd, i),
-				 iwl_pcie_tfd_tb_get_len(tfd, i),
-				 DMA_TO_DEVICE);
-
+	for (i = 1; i < num_tbs; i++) {
+		if (meta->flags & BIT(i + CMD_TB_BITMAP_POS))
+			dma_unmap_page(trans->dev,
+				       iwl_pcie_tfd_tb_get_addr(tfd, i),
+				       iwl_pcie_tfd_tb_get_len(tfd, i),
+				       DMA_TO_DEVICE);
+		else
+			dma_unmap_single(trans->dev,
+					 iwl_pcie_tfd_tb_get_addr(tfd, i),
+					 iwl_pcie_tfd_tb_get_len(tfd, i),
+					 DMA_TO_DEVICE);
+	}
 	tfd->num_tbs = 0;
 }
 
@@ -467,7 +475,7 @@ static int iwl_pcie_txq_build_tfd(struct iwl_trans *trans, struct iwl_txq *txq,
 
 	iwl_pcie_tfd_set_tb(tfd, num_tbs, addr, len);
 
-	return 0;
+	return num_tbs;
 }
 
 static int iwl_pcie_txq_alloc(struct iwl_trans *trans,
@@ -915,6 +923,7 @@ int iwl_pcie_tx_init(struct iwl_trans *trans)
 		}
 	}
 
+	iwl_set_bits_prph(trans, SCD_GP_CTRL, SCD_GP_CTRL_AUTO_ACTIVE_MODE);
 	if (trans->cfg->base_params->num_of_queues > 20)
 		iwl_set_bits_prph(trans, SCD_GP_CTRL,
 				  SCD_GP_CTRL_ENABLE_31_QUEUES);
@@ -1320,13 +1329,24 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
 	int idx;
 	u16 copy_size, cmd_size, scratch_size;
 	bool had_nocopy = false;
+	u8 group_id = iwl_cmd_groupid(cmd->id);
 	int i, ret;
 	u32 cmd_pos;
 	const u8 *cmddata[IWL_MAX_CMD_TBS_PER_TFD];
 	u16 cmdlen[IWL_MAX_CMD_TBS_PER_TFD];
 
-	copy_size = sizeof(out_cmd->hdr);
-	cmd_size = sizeof(out_cmd->hdr);
+	if (WARN(!trans_pcie->wide_cmd_header &&
+		 group_id > IWL_ALWAYS_LONG_GROUP,
+		 "unsupported wide command %#x\n", cmd->id))
+		return -EINVAL;
+
+	if (group_id != 0) {
+		copy_size = sizeof(struct iwl_cmd_header_wide);
+		cmd_size = sizeof(struct iwl_cmd_header_wide);
+	} else {
+		copy_size = sizeof(struct iwl_cmd_header);
+		cmd_size = sizeof(struct iwl_cmd_header);
+	}
 
 	/* need one for the header if the first is NOCOPY */
 	BUILD_BUG_ON(IWL_MAX_CMD_TBS_PER_TFD > IWL_NUM_OF_TBS - 1);
@@ -1416,16 +1436,32 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
 		out_meta->source = cmd;
 
 	/* set up the header */
-
-	out_cmd->hdr.cmd = cmd->id;
-	out_cmd->hdr.flags = 0;
-	out_cmd->hdr.sequence =
-		cpu_to_le16(QUEUE_TO_SEQ(trans_pcie->cmd_queue) |
-					 INDEX_TO_SEQ(q->write_ptr));
+	if (group_id != 0) {
+		out_cmd->hdr_wide.cmd = iwl_cmd_opcode(cmd->id);
+		out_cmd->hdr_wide.group_id = group_id;
+		out_cmd->hdr_wide.version = iwl_cmd_version(cmd->id);
+		out_cmd->hdr_wide.length =
+			cpu_to_le16(cmd_size -
+				    sizeof(struct iwl_cmd_header_wide));
+		out_cmd->hdr_wide.reserved = 0;
+		out_cmd->hdr_wide.sequence =
+			cpu_to_le16(QUEUE_TO_SEQ(trans_pcie->cmd_queue) |
+						 INDEX_TO_SEQ(q->write_ptr));
+
+		cmd_pos = sizeof(struct iwl_cmd_header_wide);
+		copy_size = sizeof(struct iwl_cmd_header_wide);
+	} else {
+		out_cmd->hdr.cmd = iwl_cmd_opcode(cmd->id);
+		out_cmd->hdr.sequence =
+			cpu_to_le16(QUEUE_TO_SEQ(trans_pcie->cmd_queue) |
+						 INDEX_TO_SEQ(q->write_ptr));
+		out_cmd->hdr.group_id = 0;
+
+		cmd_pos = sizeof(struct iwl_cmd_header);
+		copy_size = sizeof(struct iwl_cmd_header);
+	}
 
 	/* and copy the data that needs to be copied */
-	cmd_pos = offsetof(struct iwl_device_cmd, payload);
-	copy_size = sizeof(out_cmd->hdr);
 	for (i = 0; i < IWL_MAX_CMD_TBS_PER_TFD; i++) {
 		int copy;
 
@@ -1464,9 +1500,10 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
 	}
 
 	IWL_DEBUG_HC(trans,
-		     "Sending command %s (#%x), seq: 0x%04X, %d bytes at %d[%d]:%d\n",
+		     "Sending command %s (%.2x.%.2x), seq: 0x%04X, %d bytes at %d[%d]:%d\n",
 		     get_cmd_string(trans_pcie, out_cmd->hdr.cmd),
-		     out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
+		     group_id, out_cmd->hdr.cmd,
+		     le16_to_cpu(out_cmd->hdr.sequence),
 		     cmd_size, q->write_ptr, idx, trans_pcie->cmd_queue);
 
 	/* start the TFD with the scratchbuf */
@@ -1516,12 +1553,14 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
 		iwl_pcie_txq_build_tfd(trans, txq, phys_addr, cmdlen[i], false);
 	}
 
+	BUILD_BUG_ON(IWL_NUM_OF_TBS + CMD_TB_BITMAP_POS >
+		     sizeof(out_meta->flags) * BITS_PER_BYTE);
 	out_meta->flags = cmd->flags;
 	if (WARN_ON_ONCE(txq->entries[idx].free_buf))
 		kzfree(txq->entries[idx].free_buf);
 	txq->entries[idx].free_buf = dup_buf;
 
-	trace_iwlwifi_dev_hcmd(trans->dev, cmd, cmd_size, &out_cmd->hdr);
+	trace_iwlwifi_dev_hcmd(trans->dev, cmd, cmd_size, &out_cmd->hdr_wide);
 
 	/* start timer if queue currently empty */
 	if (q->read_ptr == q->write_ptr && txq->wd_timeout)
@@ -1552,15 +1591,13 @@ static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
 /*
  * iwl_pcie_hcmd_complete - Pull unused buffers off the queue and reclaim them
  * @rxb: Rx buffer to reclaim
- * @handler_status: return value of the handler of the command
- *	(put in setup_rx_handlers)
  *
  * If an Rx buffer has an async callback associated with it the callback
  * will be executed.  The attached skb (if present) will only be freed
  * if the callback returns 1
  */
 void iwl_pcie_hcmd_complete(struct iwl_trans *trans,
-			    struct iwl_rx_cmd_buffer *rxb, int handler_status)
+			    struct iwl_rx_cmd_buffer *rxb)
 {
 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
@@ -1599,7 +1636,6 @@ void iwl_pcie_hcmd_complete(struct iwl_trans *trans,
 		meta->source->resp_pkt = pkt;
 		meta->source->_rx_page_addr = (unsigned long)page_address(p);
 		meta->source->_rx_page_order = trans_pcie->rx_page_order;
-		meta->source->handler_status = handler_status;
 	}
 
 	iwl_pcie_cmdq_reclaim(trans, txq_id, index);
@@ -1762,7 +1798,7 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 		      struct iwl_device_cmd *dev_cmd, int txq_id)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	struct ieee80211_hdr *hdr;
 	struct iwl_tx_cmd *tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
 	struct iwl_cmd_meta *out_meta;
 	struct iwl_txq *txq;
@@ -1771,9 +1807,10 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 	void *tb1_addr;
 	u16 len, tb1_len, tb2_len;
 	bool wait_write_ptr;
-	__le16 fc = hdr->frame_control;
-	u8 hdr_len = ieee80211_hdrlen(fc);
+	__le16 fc;
+	u8 hdr_len;
 	u16 wifi_seq;
+	int i;
 
 	txq = &trans_pcie->txq[txq_id];
 	q = &txq->q;
@@ -1782,6 +1819,18 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 		      "TX on unused queue %d\n", txq_id))
 		return -EINVAL;
 
+	if (skb_is_nonlinear(skb) &&
+	    skb_shinfo(skb)->nr_frags > IWL_PCIE_MAX_FRAGS &&
+	    __skb_linearize(skb))
+		return -ENOMEM;
+
+	/* mac80211 always puts the full header into the SKB's head,
+	 * so there's no need to check if it's readable there
+	 */
+	hdr = (struct ieee80211_hdr *)skb->data;
+	fc = hdr->frame_control;
+	hdr_len = ieee80211_hdrlen(fc);
+
 	spin_lock(&txq->lock);
 
 	/* In AGG mode, the index in the ring must correspond to the WiFi
@@ -1812,6 +1861,7 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 
 	/* Set up first empty entry in queue's array of Tx/cmd buffers */
 	out_meta = &txq->entries[q->write_ptr].meta;
+	out_meta->flags = 0;
 
 	/*
 	 * The second TB (tb1) points to the remainder of the TX command
@@ -1845,9 +1895,9 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 
 	/*
 	 * Set up TFD's third entry to point directly to remainder
-	 * of skb, if any (802.11 null frames have no payload).
+	 * of skb's head, if any
 	 */
-	tb2_len = skb->len - hdr_len;
+	tb2_len = skb_headlen(skb) - hdr_len;
 	if (tb2_len > 0) {
 		dma_addr_t tb2_phys = dma_map_single(trans->dev,
 						     skb->data + hdr_len,
@@ -1860,6 +1910,29 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 		iwl_pcie_txq_build_tfd(trans, txq, tb2_phys, tb2_len, false);
 	}
 
+	/* set up the remaining entries to point to the data */
+	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+		dma_addr_t tb_phys;
+		int tb_idx;
+
+		if (!skb_frag_size(frag))
+			continue;
+
+		tb_phys = skb_frag_dma_map(trans->dev, frag, 0,
+					   skb_frag_size(frag), DMA_TO_DEVICE);
+
+		if (unlikely(dma_mapping_error(trans->dev, tb_phys))) {
+			iwl_pcie_tfd_unmap(trans, out_meta,
+					   &txq->tfds[q->write_ptr]);
+			goto out_err;
+		}
+		tb_idx = iwl_pcie_txq_build_tfd(trans, txq, tb_phys,
+						skb_frag_size(frag), false);
+
+		out_meta->flags |= BIT(tb_idx + CMD_TB_BITMAP_POS);
+	}
+
 	/* Set up entry for this TFD in Tx byte-count array */
 	iwl_pcie_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len));
 
@@ -1869,7 +1942,7 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 			     &dev_cmd->hdr, IWL_HCMD_SCRATCHBUF_SIZE + tb1_len,
 			     skb->data + hdr_len, tb2_len);
 	trace_iwlwifi_dev_tx_data(trans->dev, skb,
-				  skb->data + hdr_len, tb2_len);
+				  hdr_len, skb->len - hdr_len);
 
 	wait_write_ptr = ieee80211_has_morefrags(fc);