blob: 1610722b8099dc54f8ecbb8552e0db47a8c1a87f [file] [log] [blame]
/******************************************************************************
*
* 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);