iwlwifi: refactor out paging code

Refactor the paging code from mvm to be used by different opmodes.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/Makefile

@@ -11,6 +11,7 @@ iwlwifi-$(CONFIG_IWLDVM) += cfg/1000.o cfg/2000.o cfg/5000.o cfg/6000.o
 iwlwifi-$(CONFIG_IWLMVM) += cfg/7000.o cfg/8000.o cfg/9000.o cfg/a000.o
 iwlwifi-objs		+= iwl-trans.o
 iwlwifi-objs		+= fw/notif-wait.o
+iwlwifi-$(CONFIG_IWLMVM) += fw/paging.o
 
 iwlwifi-objs += $(iwlwifi-m)
 

drivers/net/wireless/intel/iwlwifi/fw/api.h

@@ -226,4 +226,47 @@ struct iwl_phy_db_cmd {
 	u8 data[];
 } __packed;
 
+#define NUM_OF_FW_PAGING_BLOCKS	33 /* 32 for data and 1 block for CSS */
+
+/**
+ * struct iwl_fw_paging_cmd - paging layout
+ *
+ * Send to FW the paging layout in the driver.
+ *
+ * @flags: various flags for the command
+ * @block_size: the block size in powers of 2
+ * @block_num: number of blocks specified in the command.
+ * @device_phy_addr: virtual addresses from device side
+ */
+struct iwl_fw_paging_cmd {
+	__le32 flags;
+	__le32 block_size;
+	__le32 block_num;
+	__le32 device_phy_addr[NUM_OF_FW_PAGING_BLOCKS];
+} __packed; /* FW_PAGING_BLOCK_CMD_API_S_VER_1 */
+
+/**
+ * enum iwl_fw_item_id - FW item IDs
+ *
+ * @IWL_FW_ITEM_ID_PAGING: Address of the pages that the FW will upload
+ *	download
+ */
+enum iwl_fw_item_id {
+	IWL_FW_ITEM_ID_PAGING = 3,
+};
+
+/**
+ * struct iwl_fw_get_item_cmd - get an item from the fw
+ * @item_id: ID of item to obtain, see &enum iwl_fw_item_id
+ */
+struct iwl_fw_get_item_cmd {
+	__le32 item_id;
+} __packed; /* FW_GET_ITEM_CMD_API_S_VER_1 */
+
+struct iwl_fw_get_item_resp {
+	__le32 item_id;
+	__le32 item_byte_cnt;
+	__le32 item_val;
+} __packed; /* FW_GET_ITEM_RSP_S_VER_1 */
+
 #endif /* __iwl_fw_api_h__*/

drivers/net/wireless/intel/iwlwifi/fw/paging.c

@@ -0,0 +1,417 @@
+/******************************************************************************
+ *
+ * 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"
+
+/* FIXME */
+#define FW_PAGING_BLOCK_CMD 0x4f
+#define FW_GET_ITEM_CMD 0x1a
+
+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);

drivers/net/wireless/intel/iwlwifi/fw/runtime.h

@@ -0,0 +1,99 @@
+/******************************************************************************
+ *
+ * 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) 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) 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.
+ *
+ *****************************************************************************/
+#ifndef __iwl_fw_runtime_h__
+#define __iwl_fw_runtime_h__
+
+#include "iwl-config.h"
+#include "iwl-trans.h"
+#include "img.h"
+#include "api.h"
+
+/**
+ * struct iwl_fw_runtime - runtime data for firmware
+ * @fw: firmware image
+ * @cfg: NIC configuration
+ * @dev: device pointer
+ * @fw_paging_db: paging database
+ * @num_of_paging_blk: number of paging blocks
+ * @num_of_pages_in_last_blk: number of pages in the last block
+ */
+struct iwl_fw_runtime {
+	struct iwl_trans *trans;
+	const struct iwl_fw *fw;
+	struct device *dev;
+
+	/* Paging */
+	struct iwl_fw_paging fw_paging_db[NUM_OF_FW_PAGING_BLOCKS];
+	u16 num_of_paging_blk;
+	u16 num_of_pages_in_last_blk;
+};
+
+static inline void iwl_fw_runtime_init(struct iwl_fw_runtime *fwrt,
+				       struct iwl_trans *trans,
+				       const struct iwl_fw *fw)
+{
+	memset(fwrt, 0, sizeof(*fwrt));
+	fwrt->trans = trans;
+	fwrt->fw = fw;
+	fwrt->dev = trans->dev;
+}
+
+int iwl_init_paging(struct iwl_fw_runtime *fwrt, enum iwl_ucode_type type);
+void iwl_free_fw_paging(struct iwl_fw_runtime *fwrt);
+
+#endif /* __iwl_fw_runtime_h__ */

drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h

@@ -1000,44 +1000,6 @@ struct iwl_nvm_access_cmd {
 	u8 data[];
 } __packed; /* NVM_ACCESS_CMD_API_S_VER_2 */
 
-#define NUM_OF_FW_PAGING_BLOCKS	33 /* 32 for data and 1 block for CSS */
-
-/**
- * struct iwl_fw_paging_cmd - paging layout
- *
- * (FW_PAGING_BLOCK_CMD = 0x4f)
- *
- * Send to FW the paging layout in the driver.
- *
- * @flags: various flags for the command
- * @block_size: the block size in powers of 2
- * @block_num: number of blocks specified in the command.
- * @device_phy_addr: virtual addresses from device side
- */
-struct iwl_fw_paging_cmd {
-	__le32 flags;
-	__le32 block_size;
-	__le32 block_num;
-	__le32 device_phy_addr[NUM_OF_FW_PAGING_BLOCKS];
-} __packed; /* FW_PAGING_BLOCK_CMD_API_S_VER_1 */
-
-/*
- * Fw items ID's
- *
- * @IWL_FW_ITEM_ID_PAGING: Address of the pages that the FW will upload
- *	download
- */
-enum iwl_fw_item_id {
-	IWL_FW_ITEM_ID_PAGING = 3,
-};
-
-/*
- * struct iwl_fw_get_item_cmd - get an item from the fw
- */
-struct iwl_fw_get_item_cmd {
-	__le32 item_id;
-} __packed; /* FW_GET_ITEM_CMD_API_S_VER_1 */
-
 #define CONT_REC_COMMAND_SIZE	80
 #define ENABLE_CONT_RECORDING	0x15
 #define DISABLE_CONT_RECORDING	0x16
@@ -1058,12 +1020,6 @@ struct iwl_continuous_record_cmd {
 		sizeof(struct iwl_continuous_record_mode)];
 } __packed;
 
-struct iwl_fw_get_item_resp {
-	__le32 item_id;
-	__le32 item_byte_cnt;
-	__le32 item_val;
-} __packed; /* FW_GET_ITEM_RSP_S_VER_1 */
-
 /**
  * struct iwl_nvm_access_resp_ver2 - response to NVM_ACCESS_CMD
  * @offset: offset in bytes into the section

drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c

@@ -694,8 +694,8 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 	/* Make room for fw's virtual image pages, if it exists */
 	if (!mvm->trans->cfg->gen2 &&
 	    mvm->fw->img[mvm->cur_ucode].paging_mem_size &&
-	    mvm->fw_paging_db[0].fw_paging_block)
-		file_len += mvm->num_of_paging_blk *
+	    mvm->fwrt.fw_paging_db[0].fw_paging_block)
+		file_len += mvm->fwrt.num_of_paging_blk *
 			(sizeof(*dump_data) +
 			 sizeof(struct iwl_fw_error_dump_paging) +
 			 PAGING_BLOCK_SIZE);
@@ -833,12 +833,12 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 	/* Dump fw's virtual image */
 	if (!mvm->trans->cfg->gen2 &&
 	    mvm->fw->img[mvm->cur_ucode].paging_mem_size &&
-	    mvm->fw_paging_db[0].fw_paging_block) {
-		for (i = 1; i < mvm->num_of_paging_blk + 1; i++) {
+	    mvm->fwrt.fw_paging_db[0].fw_paging_block) {
+		for (i = 1; i < mvm->fwrt.num_of_paging_blk + 1; i++) {
 			struct iwl_fw_error_dump_paging *paging;
 			struct page *pages =
-				mvm->fw_paging_db[i].fw_paging_block;
-			dma_addr_t addr = mvm->fw_paging_db[i].fw_paging_phys;
+				mvm->fwrt.fw_paging_db[i].fw_paging_block;
+			dma_addr_t addr = mvm->fwrt.fw_paging_db[i].fw_paging_phys;
 
 			dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
 			dump_data->len = cpu_to_le32(sizeof(*paging) +

drivers/net/wireless/intel/iwlwifi/mvm/fw.c

@@ -144,134 +144,6 @@ static int iwl_mvm_send_dqa_cmd(struct iwl_mvm *mvm)
 	return ret;
 }
 
-void iwl_free_fw_paging(struct iwl_mvm *mvm)
-{
-	int i;
-
-	if (!mvm->fw_paging_db[0].fw_paging_block)
-		return;
-
-	for (i = 0; i < NUM_OF_FW_PAGING_BLOCKS; i++) {
-		struct iwl_fw_paging *paging = &mvm->fw_paging_db[i];
-
-		if (!paging->fw_paging_block) {
-			IWL_DEBUG_FW(mvm,
-				     "Paging: block %d already freed, continue to next page\n",
-				     i);
-
-			continue;
-		}
-		dma_unmap_page(mvm->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(mvm->trans->paging_download_buf);
-	mvm->trans->paging_download_buf = NULL;
-	mvm->trans->paging_db = NULL;
-
-	memset(mvm->fw_paging_db, 0, sizeof(mvm->fw_paging_db));
-}
-
-static int iwl_fill_paging_mem(struct iwl_mvm *mvm, 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(mvm, "Paging: Missing CSS and/or paging sections\n");
-		iwl_free_fw_paging(mvm);
-		return -EINVAL;
-	}
-
-	/* copy the CSS block to the dram */
-	IWL_DEBUG_FW(mvm, "Paging: load paging CSS to FW, sec = %d\n",
-		     sec_idx);
-
-	memcpy(page_address(mvm->fw_paging_db[0].fw_paging_block),
-	       image->sec[sec_idx].data,
-	       mvm->fw_paging_db[0].fw_paging_size);
-	dma_sync_single_for_device(mvm->trans->dev,
-				   mvm->fw_paging_db[0].fw_paging_phys,
-				   mvm->fw_paging_db[0].fw_paging_size,
-				   DMA_BIDIRECTIONAL);
-
-	IWL_DEBUG_FW(mvm,
-		     "Paging: copied %d CSS bytes to first block\n",
-		     mvm->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 < mvm->num_of_paging_blk; idx++) {
-		struct iwl_fw_paging *block = &mvm->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(mvm->trans->dev,
-					   block->fw_paging_phys,
-					   block->fw_paging_size,
-					   DMA_BIDIRECTIONAL);
-
-
-		IWL_DEBUG_FW(mvm,
-			     "Paging: copied %d paging bytes to block %d\n",
-			     mvm->fw_paging_db[idx].fw_paging_size,
-			     idx);
-
-		offset += mvm->fw_paging_db[idx].fw_paging_size;
-	}
-
-	/* copy the last paging block */
-	if (mvm->num_of_pages_in_last_blk > 0) {
-		struct iwl_fw_paging *block = &mvm->fw_paging_db[idx];
-
-		memcpy(page_address(block->fw_paging_block),
-		       image->sec[sec_idx].data + offset,
-		       FW_PAGING_SIZE * mvm->num_of_pages_in_last_blk);
-		dma_sync_single_for_device(mvm->trans->dev,
-					   block->fw_paging_phys,
-					   block->fw_paging_size,
-					   DMA_BIDIRECTIONAL);
-
-		IWL_DEBUG_FW(mvm,
-			     "Paging: copied %d pages in the last block %d\n",
-			     mvm->num_of_pages_in_last_blk, idx);
-	}
-
-	return 0;
-}
-
 void iwl_mvm_mfu_assert_dump_notif(struct iwl_mvm *mvm,
 				   struct iwl_rx_cmd_buffer *rxb)
 {
@@ -293,178 +165,6 @@ void iwl_mvm_mfu_assert_dump_notif(struct iwl_mvm *mvm,
 			       le32_to_cpu(dump_data[i]));
 }
 
-static int iwl_alloc_fw_paging_mem(struct iwl_mvm *mvm,
-				   const struct fw_img *image)
-{
-	struct page *block;
-	dma_addr_t phys = 0;
-	int blk_idx, order, num_of_pages, size, dma_enabled;
-
-	if (mvm->fw_paging_db[0].fw_paging_block)
-		return 0;
-
-	dma_enabled = is_device_dma_capable(mvm->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;
-	mvm->num_of_paging_blk =
-		DIV_ROUND_UP(num_of_pages, NUM_OF_PAGE_PER_GROUP);
-	mvm->num_of_pages_in_last_blk =
-		num_of_pages -
-		NUM_OF_PAGE_PER_GROUP * (mvm->num_of_paging_blk - 1);
-
-	IWL_DEBUG_FW(mvm,
-		     "Paging: allocating mem for %d paging blocks, each block holds 8 pages, last block holds %d pages\n",
-		     mvm->num_of_paging_blk,
-		     mvm->num_of_pages_in_last_blk);
-
-	/*
-	 * Allocate CSS and paging blocks in dram.
-	 */
-	for (blk_idx = 0; blk_idx < mvm->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(mvm);
-			return -ENOMEM;
-		}
-
-		mvm->fw_paging_db[blk_idx].fw_paging_block = block;
-		mvm->fw_paging_db[blk_idx].fw_paging_size = size;
-
-		if (dma_enabled) {
-			phys = dma_map_page(mvm->trans->dev, block, 0,
-					    PAGE_SIZE << order,
-					    DMA_BIDIRECTIONAL);
-			if (dma_mapping_error(mvm->trans->dev, phys)) {
-				/*
-				 * free the previous pages and the current one
-				 * since we failed to map_page.
-				 */
-				iwl_free_fw_paging(mvm);
-				return -ENOMEM;
-			}
-			mvm->fw_paging_db[blk_idx].fw_paging_phys = phys;
-		} else {
-			mvm->fw_paging_db[blk_idx].fw_paging_phys =
-				PAGING_ADDR_SIG |
-				blk_idx << BLOCK_2_EXP_SIZE;
-		}
-
-		if (!blk_idx)
-			IWL_DEBUG_FW(mvm,
-				     "Paging: allocated 4K(CSS) bytes (order %d) for firmware paging.\n",
-				     order);
-		else
-			IWL_DEBUG_FW(mvm,
-				     "Paging: allocated 32K bytes (order %d) for firmware paging.\n",
-				     order);
-	}
-
-	return 0;
-}
-
-static int iwl_save_fw_paging(struct iwl_mvm *mvm,
-			      const struct fw_img *fw)
-{
-	int ret;
-
-	ret = iwl_alloc_fw_paging_mem(mvm, fw);
-	if (ret)
-		return ret;
-
-	return iwl_fill_paging_mem(mvm, fw);
-}
-
-/* send paging cmd to FW in case CPU2 has paging image */
-static int iwl_send_paging_cmd(struct iwl_mvm *mvm, const struct fw_img *fw)
-{
-	struct iwl_fw_paging_cmd paging_cmd = {
-		.flags = cpu_to_le32(PAGING_CMD_IS_SECURED |
-				     PAGING_CMD_IS_ENABLED |
-				     (mvm->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(mvm->num_of_paging_blk),
-	};
-	int blk_idx;
-
-	/* loop for for all paging blocks + CSS block */
-	for (blk_idx = 0; blk_idx < mvm->num_of_paging_blk + 1; blk_idx++) {
-		dma_addr_t addr = mvm->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_mvm_send_cmd_pdu(mvm, iwl_cmd_id(FW_PAGING_BLOCK_CMD,
-						    IWL_ALWAYS_LONG_GROUP, 0),
-				    0, sizeof(paging_cmd), &paging_cmd);
-}
-
-/*
- * Send paging item cmd to FW in case CPU2 has paging image
- */
-static int iwl_trans_get_paging_item(struct iwl_mvm *mvm)
-{
-	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, },
-	};
-
-	cmd.len[0] = sizeof(struct iwl_fw_get_item_cmd);
-
-	ret = iwl_mvm_send_cmd(mvm, &cmd);
-	if (ret) {
-		IWL_ERR(mvm,
-			"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(mvm,
-			"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 */
-	mvm->trans->paging_download_buf = kzalloc(PAGING_BLOCK_SIZE +
-						  FW_PAGING_SIZE,
-						  GFP_KERNEL);
-	if (!mvm->trans->paging_download_buf) {
-		ret = -ENOMEM;
-		goto exit;
-	}
-	mvm->trans->paging_req_addr = le32_to_cpu(item_resp->item_val);
-	mvm->trans->paging_db = mvm->fw_paging_db;
-	IWL_DEBUG_FW(mvm,
-		     "Paging: got paging request address (paging_req_addr 0x%08x)\n",
-		     mvm->trans->paging_req_addr);
-
-exit:
-	iwl_free_resp(&cmd);
-
-	return ret;
-}
-
 static bool iwl_alive_fn(struct iwl_notif_wait_data *notif_wait,
 			 struct iwl_rx_packet *pkt, void *data)
 {
@@ -544,48 +244,6 @@ static bool iwl_wait_phy_db_entry(struct iwl_notif_wait_data *notif_wait,
 	return false;
 }
 
-static int iwl_mvm_init_paging(struct iwl_mvm *mvm)
-{
-	const struct fw_img *fw = &mvm->fw->img[mvm->cur_ucode];
-	int ret;
-
-	/*
-	 * 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(mvm->trans->dev)) {
-		ret = iwl_trans_get_paging_item(mvm);
-		if (ret) {
-			IWL_ERR(mvm, "failed to get FW paging item\n");
-			return ret;
-		}
-	}
-
-	ret = iwl_save_fw_paging(mvm, fw);
-	if (ret) {
-		IWL_ERR(mvm, "failed to save the FW paging image\n");
-		return ret;
-	}
-
-	ret = iwl_send_paging_cmd(mvm, fw);
-	if (ret) {
-		IWL_ERR(mvm, "failed to send the paging cmd\n");
-		iwl_free_fw_paging(mvm);
-		return ret;
-	}
-
-	return 0;
-}
 static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,
 					 enum iwl_ucode_type ucode_type)
 {
@@ -1495,7 +1153,7 @@ static int iwl_mvm_load_rt_fw(struct iwl_mvm *mvm)
 	if (ret)
 		return ret;
 
-	return iwl_mvm_init_paging(mvm);
+	return iwl_init_paging(&mvm->fwrt, mvm->cur_ucode);
 }
 
 int iwl_mvm_up(struct iwl_mvm *mvm)

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -87,6 +87,7 @@
 #include "fw-api.h"
 #include "constants.h"
 #include "tof.h"
+#include "fw/runtime.h"
 
 #define IWL_MVM_MAX_ADDRESSES		5
 /* RSSI offset for WkP */
@@ -815,10 +816,7 @@ struct iwl_mvm {
 	/* NVM sections */
 	struct iwl_nvm_section nvm_sections[NVM_MAX_NUM_SECTIONS];
 
-	/* Paging section */
-	struct iwl_fw_paging fw_paging_db[NUM_OF_FW_PAGING_BLOCKS];
-	u16 num_of_paging_blk;
-	u16 num_of_pages_in_last_blk;
+	struct iwl_fw_runtime fwrt;
 
 	/* EEPROM MAC addresses */
 	struct mac_address addresses[IWL_MVM_MAX_ADDRESSES];
@@ -1571,9 +1569,6 @@ void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
 					      struct iwl_rx_cmd_buffer *rxb);
 
-/* Paging */
-void iwl_free_fw_paging(struct iwl_mvm *mvm);
-
 /* MVM debugfs */
 #ifdef CONFIG_IWLWIFI_DEBUGFS
 int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir);
@@ -1798,8 +1793,7 @@ void iwl_mvm_enable_ac_txq(struct iwl_mvm *mvm, int queue, int mac80211_queue,
 
 static inline void iwl_mvm_stop_device(struct iwl_mvm *mvm)
 {
-	if (!iwl_mvm_has_new_tx_api(mvm))
-		iwl_free_fw_paging(mvm);
+	iwl_free_fw_paging(&mvm->fwrt);
 	clear_bit(IWL_MVM_STATUS_FIRMWARE_RUNNING, &mvm->status);
 	mvm->fw_dbg_conf = FW_DBG_INVALID;
 	iwl_trans_stop_device(mvm->trans);

drivers/net/wireless/intel/iwlwifi/mvm/ops.c

@@ -580,6 +580,8 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 	mvm->fw = fw;
 	mvm->hw = hw;
 
+	iwl_fw_runtime_init(&mvm->fwrt, trans, fw);
+
 	mvm->init_status = 0;
 
 	if (iwl_mvm_has_new_rx_api(mvm)) {