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

Pull networking updates from David Miller:

 1) Support ipv6 checksum offload in sunvnet driver, from Shannon
    Nelson.

 2) Move to RB-tree instead of custom AVL code in inetpeer, from Eric
    Dumazet.

 3) Allow generic XDP to work on virtual devices, from John Fastabend.

 4) Add bpf device maps and XDP_REDIRECT, which can be used to build
    arbitrary switching frameworks using XDP. From John Fastabend.

 5) Remove UFO offloads from the tree, gave us little other than bugs.

 6) Remove the IPSEC flow cache, from Florian Westphal.

 7) Support ipv6 route offload in mlxsw driver.

 8) Support VF representors in bnxt_en, from Sathya Perla.

 9) Add support for forward error correction modes to ethtool, from
    Vidya Sagar Ravipati.

10) Add time filter for packet scheduler action dumping, from Jamal Hadi
    Salim.

11) Extend the zerocopy sendmsg() used by virtio and tap to regular
    sockets via MSG_ZEROCOPY. From Willem de Bruijn.

12) Significantly rework value tracking in the BPF verifier, from Edward
    Cree.

13) Add new jump instructions to eBPF, from Daniel Borkmann.

14) Rework rtnetlink plumbing so that operations can be run without
    taking the RTNL semaphore. From Florian Westphal.

15) Support XDP in tap driver, from Jason Wang.

16) Add 32-bit eBPF JIT for ARM, from Shubham Bansal.

17) Add Huawei hinic ethernet driver.

18) Allow to report MD5 keys in TCP inet_diag dumps, from Ivan
    Delalande.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1780 commits)
  i40e: point wb_desc at the nvm_wb_desc during i40e_read_nvm_aq
  i40e: avoid NVM acquire deadlock during NVM update
  drivers: net: xgene: Remove return statement from void function
  drivers: net: xgene: Configure tx/rx delay for ACPI
  drivers: net: xgene: Read tx/rx delay for ACPI
  rocker: fix kcalloc parameter order
  rds: Fix non-atomic operation on shared flag variable
  net: sched: don't use GFP_KERNEL under spin lock
  vhost_net: correctly check tx avail during rx busy polling
  net: mdio-mux: add mdio_mux parameter to mdio_mux_init()
  rxrpc: Make service connection lookup always check for retry
  net: stmmac: Delete dead code for MDIO registration
  gianfar: Fix Tx flow control deactivation
  cxgb4: Ignore MPS_TX_INT_CAUSE[Bubble] for T6
  cxgb4: Fix pause frame count in t4_get_port_stats
  cxgb4: fix memory leak
  tun: rename generic_xdp to skb_xdp
  tun: reserve extra headroom only when XDP is set
  net: dsa: bcm_sf2: Configure IMP port TC2QOS mapping
  net: dsa: bcm_sf2: Advertise number of egress queues
  ...

1 files changed, 414 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/paging.c b/drivers/net/wireless/intel/iwlwifi/fw/paging.c
new file mode 100644
index 000000000000..1610722b8099
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/fw/paging.c
@@ -0,0 +1,414 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <linuxwifi@intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
+ * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+#include "iwl-drv.h"
+#include "runtime.h"
+#include "fw/api/commands.h"
+
+void iwl_free_fw_paging(struct iwl_fw_runtime *fwrt)
+{
+	int i;
+
+	if (!fwrt->fw_paging_db[0].fw_paging_block)
+		return;
+
+	for (i = 0; i < NUM_OF_FW_PAGING_BLOCKS; i++) {
+		struct iwl_fw_paging *paging = &fwrt->fw_paging_db[i];
+
+		if (!paging->fw_paging_block) {
+			IWL_DEBUG_FW(fwrt,
+				     "Paging: block %d already freed, continue to next page\n",
+				     i);
+
+			continue;
+		}
+		dma_unmap_page(fwrt->trans->dev, paging->fw_paging_phys,
+			       paging->fw_paging_size, DMA_BIDIRECTIONAL);
+
+		__free_pages(paging->fw_paging_block,
+			     get_order(paging->fw_paging_size));
+		paging->fw_paging_block = NULL;
+	}
+	kfree(fwrt->trans->paging_download_buf);
+	fwrt->trans->paging_download_buf = NULL;
+	fwrt->trans->paging_db = NULL;
+
+	memset(fwrt->fw_paging_db, 0, sizeof(fwrt->fw_paging_db));
+}
+IWL_EXPORT_SYMBOL(iwl_free_fw_paging);
+
+static int iwl_alloc_fw_paging_mem(struct iwl_fw_runtime *fwrt,
+				   const struct fw_img *image)
+{
+	struct page *block;
+	dma_addr_t phys = 0;
+	int blk_idx, order, num_of_pages, size, dma_enabled;
+
+	if (fwrt->fw_paging_db[0].fw_paging_block)
+		return 0;
+
+	dma_enabled = is_device_dma_capable(fwrt->trans->dev);
+
+	/* ensure BLOCK_2_EXP_SIZE is power of 2 of PAGING_BLOCK_SIZE */
+	BUILD_BUG_ON(BIT(BLOCK_2_EXP_SIZE) != PAGING_BLOCK_SIZE);
+
+	num_of_pages = image->paging_mem_size / FW_PAGING_SIZE;
+	fwrt->num_of_paging_blk =
+		DIV_ROUND_UP(num_of_pages, NUM_OF_PAGE_PER_GROUP);
+	fwrt->num_of_pages_in_last_blk =
+		num_of_pages -
+		NUM_OF_PAGE_PER_GROUP * (fwrt->num_of_paging_blk - 1);
+
+	IWL_DEBUG_FW(fwrt,
+		     "Paging: allocating mem for %d paging blocks, each block holds 8 pages, last block holds %d pages\n",
+		     fwrt->num_of_paging_blk,
+		     fwrt->num_of_pages_in_last_blk);
+
+	/*
+	 * Allocate CSS and paging blocks in dram.
+	 */
+	for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) {
+		/* For CSS allocate 4KB, for others PAGING_BLOCK_SIZE (32K) */
+		size = blk_idx ? PAGING_BLOCK_SIZE : FW_PAGING_SIZE;
+		order = get_order(size);
+		block = alloc_pages(GFP_KERNEL, order);
+		if (!block) {
+			/* free all the previous pages since we failed */
+			iwl_free_fw_paging(fwrt);
+			return -ENOMEM;
+		}
+
+		fwrt->fw_paging_db[blk_idx].fw_paging_block = block;
+		fwrt->fw_paging_db[blk_idx].fw_paging_size = size;
+
+		if (dma_enabled) {
+			phys = dma_map_page(fwrt->trans->dev, block, 0,
+					    PAGE_SIZE << order,
+					    DMA_BIDIRECTIONAL);
+			if (dma_mapping_error(fwrt->trans->dev, phys)) {
+				/*
+				 * free the previous pages and the current one
+				 * since we failed to map_page.
+				 */
+				iwl_free_fw_paging(fwrt);
+				return -ENOMEM;
+			}
+			fwrt->fw_paging_db[blk_idx].fw_paging_phys = phys;
+		} else {
+			fwrt->fw_paging_db[blk_idx].fw_paging_phys =
+				PAGING_ADDR_SIG |
+				blk_idx << BLOCK_2_EXP_SIZE;
+		}
+
+		if (!blk_idx)
+			IWL_DEBUG_FW(fwrt,
+				     "Paging: allocated 4K(CSS) bytes (order %d) for firmware paging.\n",
+				     order);
+		else
+			IWL_DEBUG_FW(fwrt,
+				     "Paging: allocated 32K bytes (order %d) for firmware paging.\n",
+				     order);
+	}
+
+	return 0;
+}
+
+static int iwl_fill_paging_mem(struct iwl_fw_runtime *fwrt,
+			       const struct fw_img *image)
+{
+	int sec_idx, idx;
+	u32 offset = 0;
+
+	/*
+	 * find where is the paging image start point:
+	 * if CPU2 exist and it's in paging format, then the image looks like:
+	 * CPU1 sections (2 or more)
+	 * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between CPU1 to CPU2
+	 * CPU2 sections (not paged)
+	 * PAGING_SEPARATOR_SECTION delimiter - separate between CPU2
+	 * non paged to CPU2 paging sec
+	 * CPU2 paging CSS
+	 * CPU2 paging image (including instruction and data)
+	 */
+	for (sec_idx = 0; sec_idx < image->num_sec; sec_idx++) {
+		if (image->sec[sec_idx].offset == PAGING_SEPARATOR_SECTION) {
+			sec_idx++;
+			break;
+		}
+	}
+
+	/*
+	 * If paging is enabled there should be at least 2 more sections left
+	 * (one for CSS and one for Paging data)
+	 */
+	if (sec_idx >= image->num_sec - 1) {
+		IWL_ERR(fwrt, "Paging: Missing CSS and/or paging sections\n");
+		iwl_free_fw_paging(fwrt);
+		return -EINVAL;
+	}
+
+	/* copy the CSS block to the dram */
+	IWL_DEBUG_FW(fwrt, "Paging: load paging CSS to FW, sec = %d\n",
+		     sec_idx);
+
+	memcpy(page_address(fwrt->fw_paging_db[0].fw_paging_block),
+	       image->sec[sec_idx].data,
+	       fwrt->fw_paging_db[0].fw_paging_size);
+	dma_sync_single_for_device(fwrt->trans->dev,
+				   fwrt->fw_paging_db[0].fw_paging_phys,
+				   fwrt->fw_paging_db[0].fw_paging_size,
+				   DMA_BIDIRECTIONAL);
+
+	IWL_DEBUG_FW(fwrt,
+		     "Paging: copied %d CSS bytes to first block\n",
+		     fwrt->fw_paging_db[0].fw_paging_size);
+
+	sec_idx++;
+
+	/*
+	 * copy the paging blocks to the dram
+	 * loop index start from 1 since that CSS block already copied to dram
+	 * and CSS index is 0.
+	 * loop stop at num_of_paging_blk since that last block is not full.
+	 */
+	for (idx = 1; idx < fwrt->num_of_paging_blk; idx++) {
+		struct iwl_fw_paging *block = &fwrt->fw_paging_db[idx];
+
+		memcpy(page_address(block->fw_paging_block),
+		       image->sec[sec_idx].data + offset,
+		       block->fw_paging_size);
+		dma_sync_single_for_device(fwrt->trans->dev,
+					   block->fw_paging_phys,
+					   block->fw_paging_size,
+					   DMA_BIDIRECTIONAL);
+
+		IWL_DEBUG_FW(fwrt,
+			     "Paging: copied %d paging bytes to block %d\n",
+			     fwrt->fw_paging_db[idx].fw_paging_size,
+			     idx);
+
+		offset += fwrt->fw_paging_db[idx].fw_paging_size;
+	}
+
+	/* copy the last paging block */
+	if (fwrt->num_of_pages_in_last_blk > 0) {
+		struct iwl_fw_paging *block = &fwrt->fw_paging_db[idx];
+
+		memcpy(page_address(block->fw_paging_block),
+		       image->sec[sec_idx].data + offset,
+		       FW_PAGING_SIZE * fwrt->num_of_pages_in_last_blk);
+		dma_sync_single_for_device(fwrt->trans->dev,
+					   block->fw_paging_phys,
+					   block->fw_paging_size,
+					   DMA_BIDIRECTIONAL);
+
+		IWL_DEBUG_FW(fwrt,
+			     "Paging: copied %d pages in the last block %d\n",
+			     fwrt->num_of_pages_in_last_blk, idx);
+	}
+
+	return 0;
+}
+
+static int iwl_save_fw_paging(struct iwl_fw_runtime *fwrt,
+			      const struct fw_img *fw)
+{
+	int ret;
+
+	ret = iwl_alloc_fw_paging_mem(fwrt, fw);
+	if (ret)
+		return ret;
+
+	return iwl_fill_paging_mem(fwrt, fw);
+}
+
+/* send paging cmd to FW in case CPU2 has paging image */
+static int iwl_send_paging_cmd(struct iwl_fw_runtime *fwrt,
+			       const struct fw_img *fw)
+{
+	struct iwl_fw_paging_cmd paging_cmd = {
+		.flags = cpu_to_le32(PAGING_CMD_IS_SECURED |
+				     PAGING_CMD_IS_ENABLED |
+				     (fwrt->num_of_pages_in_last_blk <<
+				      PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)),
+		.block_size = cpu_to_le32(BLOCK_2_EXP_SIZE),
+		.block_num = cpu_to_le32(fwrt->num_of_paging_blk),
+	};
+	struct iwl_host_cmd hcmd = {
+		.id = iwl_cmd_id(FW_PAGING_BLOCK_CMD, IWL_ALWAYS_LONG_GROUP, 0),
+		.len = { sizeof(paging_cmd), },
+		.data = { &paging_cmd, },
+	};
+	int blk_idx;
+
+	/* loop for for all paging blocks + CSS block */
+	for (blk_idx = 0; blk_idx < fwrt->num_of_paging_blk + 1; blk_idx++) {
+		dma_addr_t addr = fwrt->fw_paging_db[blk_idx].fw_paging_phys;
+		__le32 phy_addr;
+
+		addr = addr >> PAGE_2_EXP_SIZE;
+		phy_addr = cpu_to_le32(addr);
+		paging_cmd.device_phy_addr[blk_idx] = phy_addr;
+	}
+
+	return iwl_trans_send_cmd(fwrt->trans, &hcmd);
+}
+
+/*
+ * Send paging item cmd to FW in case CPU2 has paging image
+ */
+static int iwl_trans_get_paging_item(struct iwl_fw_runtime *fwrt)
+{
+	int ret;
+	struct iwl_fw_get_item_cmd fw_get_item_cmd = {
+		.item_id = cpu_to_le32(IWL_FW_ITEM_ID_PAGING),
+	};
+	struct iwl_fw_get_item_resp *item_resp;
+	struct iwl_host_cmd cmd = {
+		.id = iwl_cmd_id(FW_GET_ITEM_CMD, IWL_ALWAYS_LONG_GROUP, 0),
+		.flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
+		.data = { &fw_get_item_cmd, },
+		.len = { sizeof(fw_get_item_cmd), },
+	};
+
+	ret = iwl_trans_send_cmd(fwrt->trans, &cmd);
+	if (ret) {
+		IWL_ERR(fwrt,
+			"Paging: Failed to send FW_GET_ITEM_CMD cmd (err = %d)\n",
+			ret);
+		return ret;
+	}
+
+	item_resp = (void *)((struct iwl_rx_packet *)cmd.resp_pkt)->data;
+	if (item_resp->item_id != cpu_to_le32(IWL_FW_ITEM_ID_PAGING)) {
+		IWL_ERR(fwrt,
+			"Paging: got wrong item in FW_GET_ITEM_CMD resp (item_id = %u)\n",
+			le32_to_cpu(item_resp->item_id));
+		ret = -EIO;
+		goto exit;
+	}
+
+	/* Add an extra page for headers */
+	fwrt->trans->paging_download_buf = kzalloc(PAGING_BLOCK_SIZE +
+						  FW_PAGING_SIZE,
+						  GFP_KERNEL);
+	if (!fwrt->trans->paging_download_buf) {
+		ret = -ENOMEM;
+		goto exit;
+	}
+	fwrt->trans->paging_req_addr = le32_to_cpu(item_resp->item_val);
+	fwrt->trans->paging_db = fwrt->fw_paging_db;
+	IWL_DEBUG_FW(fwrt,
+		     "Paging: got paging request address (paging_req_addr 0x%08x)\n",
+		     fwrt->trans->paging_req_addr);
+
+exit:
+	iwl_free_resp(&cmd);
+
+	return ret;
+}
+
+int iwl_init_paging(struct iwl_fw_runtime *fwrt, enum iwl_ucode_type type)
+{
+	const struct fw_img *fw = &fwrt->fw->img[type];
+	int ret;
+
+	if (fwrt->trans->cfg->gen2)
+		return 0;
+
+	/*
+	 * Configure and operate fw paging mechanism.
+	 * The driver configures the paging flow only once.
+	 * The CPU2 paging image is included in the IWL_UCODE_INIT image.
+	 */
+	if (!fw->paging_mem_size)
+		return 0;
+
+	/*
+	 * When dma is not enabled, the driver needs to copy / write
+	 * the downloaded / uploaded page to / from the smem.
+	 * This gets the location of the place were the pages are
+	 * stored.
+	 */
+	if (!is_device_dma_capable(fwrt->trans->dev)) {
+		ret = iwl_trans_get_paging_item(fwrt);
+		if (ret) {
+			IWL_ERR(fwrt, "failed to get FW paging item\n");
+			return ret;
+		}
+	}
+
+	ret = iwl_save_fw_paging(fwrt, fw);
+	if (ret) {
+		IWL_ERR(fwrt, "failed to save the FW paging image\n");
+		return ret;
+	}
+
+	ret = iwl_send_paging_cmd(fwrt, fw);
+	if (ret) {
+		IWL_ERR(fwrt, "failed to send the paging cmd\n");
+		iwl_free_fw_paging(fwrt);
+		return ret;
+	}
+
+	return 0;
+}
+IWL_EXPORT_SYMBOL(iwl_init_paging);