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wcn36xx: mac80211 driver for Qualcomm WCN3660/WCN3680 hardware

Browse Source 
This is a mac80211 driver for Qualcomm WCN3660/WCN3680 devices. So
far WCN3660/WCN3680 is available only on MSM platform.

Firmware can be found here:
https://www.codeaurora.org/cgit/external/hisense/platform/vendor/qcom-opensource/wlan/prima/tree/firmware_bin?h=8130_CS

Wiki page is available here:
http://wireless.kernel.org/en/users/Drivers/wcn36xx

A lot people made a contribution to this driver. Here is the list in
alphabetical order:

Eugene Krasnikov <k.eugene.e@gmail.com>
Kalle Valo <kvalo@qca.qualcomm.com>
Olof Johansson <dev@skyshaper.net>
Pontus Fuchs <pontus.fuchs@gmail.com>
Yanbo Li <yanbol@qti.qualcomm.com>

Signed-off-by: Eugene Krasnikov <k.eugene.e@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Eugene Krasnikov 2013-10-08 21:25:58 +01:00 committed by John W. Linville
parent c856197d6e
commit 8e84c25821
18 changed files with 10082 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
MAINTAINERS
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@ -6816,6 +6816,14 @@ L: linux-hexagon@vger.kernel.org
S: Supported
F: arch/hexagon/
QUALCOMM WCN36XX WIRELESS DRIVER
M: Eugene Krasnikov <k.eugene.e@gmail.com>
L: wcn36xx@lists.infradead.org
W: http://wireless.kernel.org/en/users/Drivers/wcn36xx
T: git git://github.com/KrasnikovEugene/wcn36xx.git
S: Supported
F: drivers/net/wireless/ath/wcn36xx/
QUICKCAM PARALLEL PORT WEBCAMS
M: Hans Verkuil <hverkuil@xs4all.nl>
L: linux-media@vger.kernel.org

1
drivers/net/wireless/ath/Kconfig
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@ -32,5 +32,6 @@ source "drivers/net/wireless/ath/ath6kl/Kconfig"
source "drivers/net/wireless/ath/ar5523/Kconfig"
source "drivers/net/wireless/ath/wil6210/Kconfig"
source "drivers/net/wireless/ath/ath10k/Kconfig"
source "drivers/net/wireless/ath/wcn36xx/Kconfig"
endif

1
drivers/net/wireless/ath/Makefile
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@ -5,6 +5,7 @@ obj-$(CONFIG_ATH6KL) += ath6kl/
obj-$(CONFIG_AR5523) += ar5523/
obj-$(CONFIG_WIL6210) += wil6210/
obj-$(CONFIG_ATH10K) += ath10k/
obj-$(CONFIG_WCN36XX) += wcn36xx/
obj-$(CONFIG_ATH_COMMON) += ath.o

16
drivers/net/wireless/ath/wcn36xx/Kconfig Normal file
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@ -0,0 +1,16 @@
config WCN36XX
tristate "Qualcomm Atheros WCN3660/3680 support"
depends on MAC80211 && HAS_DMA
---help---
This module adds support for wireless adapters based on
Qualcomm Atheros WCN3660 and WCN3680 mobile chipsets.
If you choose to build a module, it'll be called wcn36xx.
config WCN36XX_DEBUGFS
bool "WCN36XX debugfs support"
depends on WCN36XX
---help---
Enabled debugfs support
If unsure, say Y to make it easier to debug problems.

7
drivers/net/wireless/ath/wcn36xx/Makefile Normal file
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@ -0,0 +1,7 @@
obj-$(CONFIG_WCN36XX) := wcn36xx.o
wcn36xx-y += main.o \
dxe.o \
txrx.o \
smd.o \
pmc.o \
debug.o

188
drivers/net/wireless/ath/wcn36xx/debug.c Normal file
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@ -0,0 +1,188 @@
/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include "wcn36xx.h"
#include "debug.h"
#include "pmc.h"
#ifdef CONFIG_WCN36XX_DEBUGFS
static int wcn36xx_debugfs_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static ssize_t read_file_bool_bmps(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct wcn36xx *wcn = file->private_data;
struct wcn36xx_vif *vif_priv = NULL;
struct ieee80211_vif *vif = NULL;
char buf[3];
list_for_each_entry(vif_priv, &wcn->vif_list, list) {
vif = container_of((void *)vif_priv,
struct ieee80211_vif,
drv_priv);
if (NL80211_IFTYPE_STATION == vif->type) {
if (vif_priv->pw_state == WCN36XX_BMPS)
buf[0] = '1';
else
buf[0] = '0';
break;
}
}
buf[1] = '\n';
buf[2] = 0x00;
return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
}
static ssize_t write_file_bool_bmps(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct wcn36xx *wcn = file->private_data;
struct wcn36xx_vif *vif_priv = NULL;
struct ieee80211_vif *vif = NULL;
char buf[32];
int buf_size;
buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
switch (buf[0]) {
case 'y':
case 'Y':
case '1':
list_for_each_entry(vif_priv, &wcn->vif_list, list) {
vif = container_of((void *)vif_priv,
struct ieee80211_vif,
drv_priv);
if (NL80211_IFTYPE_STATION == vif->type) {
wcn36xx_enable_keep_alive_null_packet(wcn, vif);
wcn36xx_pmc_enter_bmps_state(wcn, vif);
}
}
break;
case 'n':
case 'N':
case '0':
list_for_each_entry(vif_priv, &wcn->vif_list, list) {
vif = container_of((void *)vif_priv,
struct ieee80211_vif,
drv_priv);
if (NL80211_IFTYPE_STATION == vif->type)
wcn36xx_pmc_exit_bmps_state(wcn, vif);
}
break;
}
return count;
}
static const struct file_operations fops_wcn36xx_bmps = {
.open = wcn36xx_debugfs_open,
.read = read_file_bool_bmps,
.write = write_file_bool_bmps,
};
static ssize_t write_file_dump(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct wcn36xx *wcn = file->private_data;
char buf[255], *tmp;
int buf_size;
u32 arg[WCN36xx_MAX_DUMP_ARGS];
int i;
memset(buf, 0, sizeof(buf));
memset(arg, 0, sizeof(arg));
buf_size = min(count, (sizeof(buf) - 1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
tmp = buf;
for (i = 0; i < WCN36xx_MAX_DUMP_ARGS; i++) {
char *begin;
begin = strsep(&tmp, " ");
if (begin == NULL)
break;
if (kstrtoul(begin, 0, (unsigned long *)(arg + i)) != 0)
break;
}
wcn36xx_info("DUMP args is %d %d %d %d %d\n", arg[0], arg[1], arg[2],
arg[3], arg[4]);
wcn36xx_smd_dump_cmd_req(wcn, arg[0], arg[1], arg[2], arg[3], arg[4]);
return count;
}
static const struct file_operations fops_wcn36xx_dump = {
.open = wcn36xx_debugfs_open,
.write = write_file_dump,
};
#define ADD_FILE(name, mode, fop, priv_data) \
do { \
struct dentry *d; \
d = debugfs_create_file(__stringify(name), \
mode, dfs->rootdir, \
priv_data, fop); \
dfs->file_##name.dentry = d; \
if (IS_ERR(d)) { \
wcn36xx_warn("Create the debugfs entry failed");\
dfs->file_##name.dentry = NULL; \
} \
} while (0)
void wcn36xx_debugfs_init(struct wcn36xx *wcn)
{
struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
dfs->rootdir = debugfs_create_dir(KBUILD_MODNAME,
wcn->hw->wiphy->debugfsdir);
if (IS_ERR(dfs->rootdir)) {
wcn36xx_warn("Create the debugfs failed\n");
dfs->rootdir = NULL;
}
ADD_FILE(bmps_switcher, S_IRUSR | S_IWUSR,
&fops_wcn36xx_bmps, wcn);
ADD_FILE(dump, S_IWUSR, &fops_wcn36xx_dump, wcn);
}
void wcn36xx_debugfs_exit(struct wcn36xx *wcn)
{
struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
debugfs_remove_recursive(dfs->rootdir);
}
#endif /* CONFIG_WCN36XX_DEBUGFS */

49
drivers/net/wireless/ath/wcn36xx/debug.h Normal file
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@ -0,0 +1,49 @@
/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _WCN36XX_DEBUG_H_
#define _WCN36XX_DEBUG_H_
#include <linux/kernel.h>
#define WCN36xx_MAX_DUMP_ARGS 5
#ifdef CONFIG_WCN36XX_DEBUGFS
struct wcn36xx_dfs_file {
struct dentry *dentry;
u32 value;
};
struct wcn36xx_dfs_entry {
struct dentry *rootdir;
struct wcn36xx_dfs_file file_bmps_switcher;
struct wcn36xx_dfs_file file_dump;
};
void wcn36xx_debugfs_init(struct wcn36xx *wcn);
void wcn36xx_debugfs_exit(struct wcn36xx *wcn);
#else
static inline void wcn36xx_debugfs_init(struct wcn36xx *wcn)
{
}
static inline void wcn36xx_debugfs_exit(struct wcn36xx *wcn)
{
}
#endif /* CONFIG_WCN36XX_DEBUGFS */
#endif /* _WCN36XX_DEBUG_H_ */

805
drivers/net/wireless/ath/wcn36xx/dxe.c Normal file
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@ -0,0 +1,805 @@
/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* DXE - DMA transfer engine
* we have 2 channels(High prio and Low prio) for TX and 2 channels for RX.
* through low channels data packets are transfered
* through high channels managment packets are transfered
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/interrupt.h>
#include "wcn36xx.h"
#include "txrx.h"
void *wcn36xx_dxe_get_next_bd(struct wcn36xx *wcn, bool is_low)
{
struct wcn36xx_dxe_ch *ch = is_low ?
&wcn->dxe_tx_l_ch :
&wcn->dxe_tx_h_ch;
return ch->head_blk_ctl->bd_cpu_addr;
}
static void wcn36xx_dxe_write_register(struct wcn36xx *wcn, int addr, int data)
{
wcn36xx_dbg(WCN36XX_DBG_DXE,
"wcn36xx_dxe_write_register: addr=%x, data=%x\n",
addr, data);
writel(data, wcn->mmio + addr);
}
static void wcn36xx_dxe_read_register(struct wcn36xx *wcn, int addr, int *data)
{
*data = readl(wcn->mmio + addr);
wcn36xx_dbg(WCN36XX_DBG_DXE,
"wcn36xx_dxe_read_register: addr=%x, data=%x\n",
addr, *data);
}
static void wcn36xx_dxe_free_ctl_block(struct wcn36xx_dxe_ch *ch)
{
struct wcn36xx_dxe_ctl *ctl = ch->head_blk_ctl, *next;
int i;
for (i = 0; i < ch->desc_num && ctl; i++) {
next = ctl->next;
kfree(ctl);
ctl = next;
}
}
static int wcn36xx_dxe_allocate_ctl_block(struct wcn36xx_dxe_ch *ch)
{
struct wcn36xx_dxe_ctl *prev_ctl = NULL;
struct wcn36xx_dxe_ctl *cur_ctl = NULL;
int i;
for (i = 0; i < ch->desc_num; i++) {
cur_ctl = kzalloc(sizeof(*cur_ctl), GFP_KERNEL);
if (!cur_ctl)
goto out_fail;
cur_ctl->ctl_blk_order = i;
if (i == 0) {
ch->head_blk_ctl = cur_ctl;
ch->tail_blk_ctl = cur_ctl;
} else if (ch->desc_num - 1 == i) {
prev_ctl->next = cur_ctl;
cur_ctl->next = ch->head_blk_ctl;
} else {
prev_ctl->next = cur_ctl;
}
prev_ctl = cur_ctl;
}
return 0;
out_fail:
wcn36xx_dxe_free_ctl_block(ch);
return -ENOMEM;
}
int wcn36xx_dxe_alloc_ctl_blks(struct wcn36xx *wcn)
{
int ret;
wcn->dxe_tx_l_ch.ch_type = WCN36XX_DXE_CH_TX_L;
wcn->dxe_tx_h_ch.ch_type = WCN36XX_DXE_CH_TX_H;
wcn->dxe_rx_l_ch.ch_type = WCN36XX_DXE_CH_RX_L;
wcn->dxe_rx_h_ch.ch_type = WCN36XX_DXE_CH_RX_H;
wcn->dxe_tx_l_ch.desc_num = WCN36XX_DXE_CH_DESC_NUMB_TX_L;
wcn->dxe_tx_h_ch.desc_num = WCN36XX_DXE_CH_DESC_NUMB_TX_H;
wcn->dxe_rx_l_ch.desc_num = WCN36XX_DXE_CH_DESC_NUMB_RX_L;
wcn->dxe_rx_h_ch.desc_num = WCN36XX_DXE_CH_DESC_NUMB_RX_H;
wcn->dxe_tx_l_ch.dxe_wq = WCN36XX_DXE_WQ_TX_L;
wcn->dxe_tx_h_ch.dxe_wq = WCN36XX_DXE_WQ_TX_H;
wcn->dxe_tx_l_ch.ctrl_bd = WCN36XX_DXE_CTRL_TX_L_BD;
wcn->dxe_tx_h_ch.ctrl_bd = WCN36XX_DXE_CTRL_TX_H_BD;
wcn->dxe_tx_l_ch.ctrl_skb = WCN36XX_DXE_CTRL_TX_L_SKB;
wcn->dxe_tx_h_ch.ctrl_skb = WCN36XX_DXE_CTRL_TX_H_SKB;
wcn->dxe_tx_l_ch.reg_ctrl = WCN36XX_DXE_REG_CTL_TX_L;
wcn->dxe_tx_h_ch.reg_ctrl = WCN36XX_DXE_REG_CTL_TX_H;
wcn->dxe_tx_l_ch.def_ctrl = WCN36XX_DXE_CH_DEFAULT_CTL_TX_L;
wcn->dxe_tx_h_ch.def_ctrl = WCN36XX_DXE_CH_DEFAULT_CTL_TX_H;
/* DXE control block allocation */
ret = wcn36xx_dxe_allocate_ctl_block(&wcn->dxe_tx_l_ch);
if (ret)
goto out_err;
ret = wcn36xx_dxe_allocate_ctl_block(&wcn->dxe_tx_h_ch);
if (ret)
goto out_err;
ret = wcn36xx_dxe_allocate_ctl_block(&wcn->dxe_rx_l_ch);
if (ret)
goto out_err;
ret = wcn36xx_dxe_allocate_ctl_block(&wcn->dxe_rx_h_ch);
if (ret)
goto out_err;
/* Initialize SMSM state Clear TX Enable RING EMPTY STATE */
ret = wcn->ctrl_ops->smsm_change_state(
WCN36XX_SMSM_WLAN_TX_ENABLE,
WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY);
return 0;
out_err:
wcn36xx_err("Failed to allocate DXE control blocks\n");
wcn36xx_dxe_free_ctl_blks(wcn);
return -ENOMEM;
}
void wcn36xx_dxe_free_ctl_blks(struct wcn36xx *wcn)
{
wcn36xx_dxe_free_ctl_block(&wcn->dxe_tx_l_ch);
wcn36xx_dxe_free_ctl_block(&wcn->dxe_tx_h_ch);
wcn36xx_dxe_free_ctl_block(&wcn->dxe_rx_l_ch);
wcn36xx_dxe_free_ctl_block(&wcn->dxe_rx_h_ch);
}
static int wcn36xx_dxe_init_descs(struct wcn36xx_dxe_ch *wcn_ch)
{
struct wcn36xx_dxe_desc *cur_dxe = NULL;
struct wcn36xx_dxe_desc *prev_dxe = NULL;
struct wcn36xx_dxe_ctl *cur_ctl = NULL;
size_t size;
int i;
size = wcn_ch->desc_num * sizeof(struct wcn36xx_dxe_desc);
wcn_ch->cpu_addr = dma_alloc_coherent(NULL, size, &wcn_ch->dma_addr,
GFP_KERNEL);
if (!wcn_ch->cpu_addr)
return -ENOMEM;
memset(wcn_ch->cpu_addr, 0, size);
cur_dxe = (struct wcn36xx_dxe_desc *)wcn_ch->cpu_addr;
cur_ctl = wcn_ch->head_blk_ctl;
for (i = 0; i < wcn_ch->desc_num; i++) {
cur_ctl->desc = cur_dxe;
cur_ctl->desc_phy_addr = wcn_ch->dma_addr +
i * sizeof(struct wcn36xx_dxe_desc);
switch (wcn_ch->ch_type) {
case WCN36XX_DXE_CH_TX_L:
cur_dxe->ctrl = WCN36XX_DXE_CTRL_TX_L;
cur_dxe->dst_addr_l = WCN36XX_DXE_WQ_TX_L;
break;
case WCN36XX_DXE_CH_TX_H:
cur_dxe->ctrl = WCN36XX_DXE_CTRL_TX_H;
cur_dxe->dst_addr_l = WCN36XX_DXE_WQ_TX_H;
break;
case WCN36XX_DXE_CH_RX_L:
cur_dxe->ctrl = WCN36XX_DXE_CTRL_RX_L;
cur_dxe->src_addr_l = WCN36XX_DXE_WQ_RX_L;
break;
case WCN36XX_DXE_CH_RX_H:
cur_dxe->ctrl = WCN36XX_DXE_CTRL_RX_H;
cur_dxe->src_addr_l = WCN36XX_DXE_WQ_RX_H;
break;
}
if (0 == i) {
cur_dxe->phy_next_l = 0;
} else if ((0 < i) && (i < wcn_ch->desc_num - 1)) {
prev_dxe->phy_next_l =
cur_ctl->desc_phy_addr;
} else if (i == (wcn_ch->desc_num - 1)) {
prev_dxe->phy_next_l =
cur_ctl->desc_phy_addr;
cur_dxe->phy_next_l =
wcn_ch->head_blk_ctl->desc_phy_addr;
}
cur_ctl = cur_ctl->next;
prev_dxe = cur_dxe;
cur_dxe++;
}
return 0;
}
static void wcn36xx_dxe_init_tx_bd(struct wcn36xx_dxe_ch *ch,
struct wcn36xx_dxe_mem_pool *pool)
{
int i, chunk_size = pool->chunk_size;
dma_addr_t bd_phy_addr = pool->phy_addr;
void *bd_cpu_addr = pool->virt_addr;
struct wcn36xx_dxe_ctl *cur = ch->head_blk_ctl;
for (i = 0; i < ch->desc_num; i++) {
/* Only every second dxe needs a bd pointer,
the other will point to the skb data */
if (!(i & 1)) {
cur->bd_phy_addr = bd_phy_addr;
cur->bd_cpu_addr = bd_cpu_addr;
bd_phy_addr += chunk_size;
bd_cpu_addr += chunk_size;
} else {
cur->bd_phy_addr = 0;
cur->bd_cpu_addr = NULL;
}
cur = cur->next;
}
}
static int wcn36xx_dxe_enable_ch_int(struct wcn36xx *wcn, u16 wcn_ch)
{
int reg_data = 0;
wcn36xx_dxe_read_register(wcn,
WCN36XX_DXE_INT_MASK_REG,
&reg_data);
reg_data |= wcn_ch;
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_INT_MASK_REG,
(int)reg_data);
return 0;
}
static int wcn36xx_dxe_fill_skb(struct wcn36xx_dxe_ctl *ctl)
{
struct wcn36xx_dxe_desc *dxe = ctl->desc;
struct sk_buff *skb;
skb = alloc_skb(WCN36XX_PKT_SIZE, GFP_ATOMIC);
if (skb == NULL)
return -ENOMEM;
dxe->dst_addr_l = dma_map_single(NULL,
skb_tail_pointer(skb),
WCN36XX_PKT_SIZE,
DMA_FROM_DEVICE);
ctl->skb = skb;
return 0;
}
static int wcn36xx_dxe_ch_alloc_skb(struct wcn36xx *wcn,
struct wcn36xx_dxe_ch *wcn_ch)
{
int i;
struct wcn36xx_dxe_ctl *cur_ctl = NULL;
cur_ctl = wcn_ch->head_blk_ctl;
for (i = 0; i < wcn_ch->desc_num; i++) {
wcn36xx_dxe_fill_skb(cur_ctl);
cur_ctl = cur_ctl->next;
}
return 0;
}
static void wcn36xx_dxe_ch_free_skbs(struct wcn36xx *wcn,
struct wcn36xx_dxe_ch *wcn_ch)
{
struct wcn36xx_dxe_ctl *cur = wcn_ch->head_blk_ctl;
int i;
for (i = 0; i < wcn_ch->desc_num; i++) {
kfree_skb(cur->skb);
cur = cur->next;
}
}
void wcn36xx_dxe_tx_ack_ind(struct wcn36xx *wcn, u32 status)
{
struct ieee80211_tx_info *info;
struct sk_buff *skb;
unsigned long flags;
spin_lock_irqsave(&wcn->dxe_lock, flags);
skb = wcn->tx_ack_skb;
wcn->tx_ack_skb = NULL;
spin_unlock_irqrestore(&wcn->dxe_lock, flags);
if (!skb) {
wcn36xx_warn("Spurious TX complete indication\n");
return;
}
info = IEEE80211_SKB_CB(skb);
if (status == 1)
info->flags |= IEEE80211_TX_STAT_ACK;
wcn36xx_dbg(WCN36XX_DBG_DXE, "dxe tx ack status: %d\n", status);
ieee80211_tx_status_irqsafe(wcn->hw, skb);
ieee80211_wake_queues(wcn->hw);
}
static void reap_tx_dxes(struct wcn36xx *wcn, struct wcn36xx_dxe_ch *ch)
{
struct wcn36xx_dxe_ctl *ctl = ch->tail_blk_ctl;
struct ieee80211_tx_info *info;
unsigned long flags;
/*
* Make at least one loop of do-while because in case ring is
* completely full head and tail are pointing to the same element
* and while-do will not make any cycles.
*/
do {
if (ctl->skb) {
dma_unmap_single(NULL, ctl->desc->src_addr_l,
ctl->skb->len, DMA_TO_DEVICE);
info = IEEE80211_SKB_CB(ctl->skb);
if (!(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)) {
/* Keep frame until TX status comes */
ieee80211_free_txskb(wcn->hw, ctl->skb);
}
spin_lock_irqsave(&ctl->skb_lock, flags);
if (wcn->queues_stopped) {
wcn->queues_stopped = false;
ieee80211_wake_queues(wcn->hw);
}
spin_unlock_irqrestore(&ctl->skb_lock, flags);
ctl->skb = NULL;
}
ctl = ctl->next;
} while (ctl != ch->head_blk_ctl &&
!(ctl->desc->ctrl & WCN36XX_DXE_CTRL_VALID_MASK));
ch->tail_blk_ctl = ctl;
}
static irqreturn_t wcn36xx_irq_tx_complete(int irq, void *dev)
{
struct wcn36xx *wcn = (struct wcn36xx *)dev;
int int_src, int_reason;
wcn36xx_dxe_read_register(wcn, WCN36XX_DXE_INT_SRC_RAW_REG, &int_src);
if (int_src & WCN36XX_INT_MASK_CHAN_TX_H) {
wcn36xx_dxe_read_register(wcn,
WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_H,
&int_reason);
/* TODO: Check int_reason */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_0_INT_CLR,
WCN36XX_INT_MASK_CHAN_TX_H);
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_0_INT_ED_CLR,
WCN36XX_INT_MASK_CHAN_TX_H);
wcn36xx_dbg(WCN36XX_DBG_DXE, "dxe tx ready high\n");
reap_tx_dxes(wcn, &wcn->dxe_tx_h_ch);
}
if (int_src & WCN36XX_INT_MASK_CHAN_TX_L) {
wcn36xx_dxe_read_register(wcn,
WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_L,
&int_reason);
/* TODO: Check int_reason */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_0_INT_CLR,
WCN36XX_INT_MASK_CHAN_TX_L);
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_0_INT_ED_CLR,
WCN36XX_INT_MASK_CHAN_TX_L);
wcn36xx_dbg(WCN36XX_DBG_DXE, "dxe tx ready low\n");
reap_tx_dxes(wcn, &wcn->dxe_tx_l_ch);
}
return IRQ_HANDLED;
}
static irqreturn_t wcn36xx_irq_rx_ready(int irq, void *dev)
{
struct wcn36xx *wcn = (struct wcn36xx *)dev;
disable_irq_nosync(wcn->rx_irq);
wcn36xx_dxe_rx_frame(wcn);
enable_irq(wcn->rx_irq);
return IRQ_HANDLED;
}
static int wcn36xx_dxe_request_irqs(struct wcn36xx *wcn)
{
int ret;
ret = request_irq(wcn->tx_irq, wcn36xx_irq_tx_complete,
IRQF_TRIGGER_HIGH, "wcn36xx_tx", wcn);
if (ret) {
wcn36xx_err("failed to alloc tx irq\n");
goto out_err;
}
ret = request_irq(wcn->rx_irq, wcn36xx_irq_rx_ready, IRQF_TRIGGER_HIGH,
"wcn36xx_rx", wcn);
if (ret) {
wcn36xx_err("failed to alloc rx irq\n");
goto out_txirq;
}
enable_irq_wake(wcn->rx_irq);
return 0;
out_txirq:
free_irq(wcn->tx_irq, wcn);
out_err:
return ret;
}
static int wcn36xx_rx_handle_packets(struct wcn36xx *wcn,
struct wcn36xx_dxe_ch *ch)
{
struct wcn36xx_dxe_ctl *ctl = ch->head_blk_ctl;
struct wcn36xx_dxe_desc *dxe = ctl->desc;
dma_addr_t dma_addr;
struct sk_buff *skb;
while (!(dxe->ctrl & WCN36XX_DXE_CTRL_VALID_MASK)) {
skb = ctl->skb;
dma_addr = dxe->dst_addr_l;
wcn36xx_dxe_fill_skb(ctl);
switch (ch->ch_type) {
case WCN36XX_DXE_CH_RX_L:
dxe->ctrl = WCN36XX_DXE_CTRL_RX_L;
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_ENCH_ADDR,
WCN36XX_DXE_INT_CH1_MASK);
break;
case WCN36XX_DXE_CH_RX_H:
dxe->ctrl = WCN36XX_DXE_CTRL_RX_H;
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_ENCH_ADDR,
WCN36XX_DXE_INT_CH3_MASK);
break;
default:
wcn36xx_warn("Unknown channel\n");
}
dma_unmap_single(NULL, dma_addr, WCN36XX_PKT_SIZE,
DMA_FROM_DEVICE);
wcn36xx_rx_skb(wcn, skb);
ctl = ctl->next;
dxe = ctl->desc;
}
ch->head_blk_ctl = ctl;
return 0;
}
void wcn36xx_dxe_rx_frame(struct wcn36xx *wcn)
{
int int_src;
wcn36xx_dxe_read_register(wcn, WCN36XX_DXE_INT_SRC_RAW_REG, &int_src);
/* RX_LOW_PRI */
if (int_src & WCN36XX_DXE_INT_CH1_MASK) {
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_0_INT_CLR,
WCN36XX_DXE_INT_CH1_MASK);
wcn36xx_rx_handle_packets(wcn, &(wcn->dxe_rx_l_ch));
}
/* RX_HIGH_PRI */
if (int_src & WCN36XX_DXE_INT_CH3_MASK) {
/* Clean up all the INT within this channel */
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_0_INT_CLR,
WCN36XX_DXE_INT_CH3_MASK);
wcn36xx_rx_handle_packets(wcn, &(wcn->dxe_rx_h_ch));
}
if (!int_src)
wcn36xx_warn("No DXE interrupt pending\n");
}
int wcn36xx_dxe_allocate_mem_pools(struct wcn36xx *wcn)
{
size_t s;
void *cpu_addr;
/* Allocate BD headers for MGMT frames */
/* Where this come from ask QC */
wcn->mgmt_mem_pool.chunk_size = WCN36XX_BD_CHUNK_SIZE +
16 - (WCN36XX_BD_CHUNK_SIZE % 8);
s = wcn->mgmt_mem_pool.chunk_size * WCN36XX_DXE_CH_DESC_NUMB_TX_H;
cpu_addr = dma_alloc_coherent(NULL, s, &wcn->mgmt_mem_pool.phy_addr,
GFP_KERNEL);
if (!cpu_addr)
goto out_err;
wcn->mgmt_mem_pool.virt_addr = cpu_addr;
memset(cpu_addr, 0, s);
/* Allocate BD headers for DATA frames */
/* Where this come from ask QC */
wcn->data_mem_pool.chunk_size = WCN36XX_BD_CHUNK_SIZE +
16 - (WCN36XX_BD_CHUNK_SIZE % 8);
s = wcn->data_mem_pool.chunk_size * WCN36XX_DXE_CH_DESC_NUMB_TX_L;
cpu_addr = dma_alloc_coherent(NULL, s, &wcn->data_mem_pool.phy_addr,
GFP_KERNEL);
if (!cpu_addr)
goto out_err;
wcn->data_mem_pool.virt_addr = cpu_addr;
memset(cpu_addr, 0, s);
return 0;
out_err:
wcn36xx_dxe_free_mem_pools(wcn);
wcn36xx_err("Failed to allocate BD mempool\n");
return -ENOMEM;
}
void wcn36xx_dxe_free_mem_pools(struct wcn36xx *wcn)
{
if (wcn->mgmt_mem_pool.virt_addr)
dma_free_coherent(NULL, wcn->mgmt_mem_pool.chunk_size *
WCN36XX_DXE_CH_DESC_NUMB_TX_H,
wcn->mgmt_mem_pool.virt_addr,
wcn->mgmt_mem_pool.phy_addr);
if (wcn->data_mem_pool.virt_addr) {
dma_free_coherent(NULL, wcn->data_mem_pool.chunk_size *
WCN36XX_DXE_CH_DESC_NUMB_TX_L,
wcn->data_mem_pool.virt_addr,
wcn->data_mem_pool.phy_addr);
}
}
int wcn36xx_dxe_tx_frame(struct wcn36xx *wcn,
struct wcn36xx_vif *vif_priv,
struct sk_buff *skb,
bool is_low)
{
struct wcn36xx_dxe_ctl *ctl = NULL;
struct wcn36xx_dxe_desc *desc = NULL;
struct wcn36xx_dxe_ch *ch = NULL;
unsigned long flags;
ch = is_low ? &wcn->dxe_tx_l_ch : &wcn->dxe_tx_h_ch;
ctl = ch->head_blk_ctl;
spin_lock_irqsave(&ctl->next->skb_lock, flags);
/*
* If skb is not null that means that we reached the tail of the ring
* hence ring is full. Stop queues to let mac80211 back off until ring
* has an empty slot again.
*/
if (NULL != ctl->next->skb) {
ieee80211_stop_queues(wcn->hw);
wcn->queues_stopped = true;
spin_unlock_irqrestore(&ctl->next->skb_lock, flags);
return -EBUSY;
}
spin_unlock_irqrestore(&ctl->next->skb_lock, flags);
ctl->skb = NULL;
desc = ctl->desc;
/* Set source address of the BD we send */
desc->src_addr_l = ctl->bd_phy_addr;
desc->dst_addr_l = ch->dxe_wq;
desc->fr_len = sizeof(struct wcn36xx_tx_bd);
desc->ctrl = ch->ctrl_bd;
wcn36xx_dbg(WCN36XX_DBG_DXE, "DXE TX\n");
wcn36xx_dbg_dump(WCN36XX_DBG_DXE_DUMP, "DESC1 >>> ",
(char *)desc, sizeof(*desc));
wcn36xx_dbg_dump(WCN36XX_DBG_DXE_DUMP,
"BD >>> ", (char *)ctl->bd_cpu_addr,
sizeof(struct wcn36xx_tx_bd));
/* Set source address of the SKB we send */
ctl = ctl->next;
ctl->skb = skb;
desc = ctl->desc;
if (ctl->bd_cpu_addr) {
wcn36xx_err("bd_cpu_addr cannot be NULL for skb DXE\n");
return -EINVAL;
}
desc->src_addr_l = dma_map_single(NULL,
ctl->skb->data,
ctl->skb->len,
DMA_TO_DEVICE);
desc->dst_addr_l = ch->dxe_wq;
desc->fr_len = ctl->skb->len;
/* set dxe descriptor to VALID */
desc->ctrl = ch->ctrl_skb;
wcn36xx_dbg_dump(WCN36XX_DBG_DXE_DUMP, "DESC2 >>> ",
(char *)desc, sizeof(*desc));
wcn36xx_dbg_dump(WCN36XX_DBG_DXE_DUMP, "SKB >>> ",
(char *)ctl->skb->data, ctl->skb->len);
/* Move the head of the ring to the next empty descriptor */
ch->head_blk_ctl = ctl->next;
/*
* When connected and trying to send data frame chip can be in sleep
* mode and writing to the register will not wake up the chip. Instead
* notify chip about new frame through SMSM bus.
*/
if (is_low && vif_priv->pw_state == WCN36XX_BMPS) {
wcn->ctrl_ops->smsm_change_state(
0,
WCN36XX_SMSM_WLAN_TX_ENABLE);
} else {
/* indicate End Of Packet and generate interrupt on descriptor
* done.
*/
wcn36xx_dxe_write_register(wcn,
ch->reg_ctrl, ch->def_ctrl);
}
return 0;
}
int wcn36xx_dxe_init(struct wcn36xx *wcn)
{
int reg_data = 0, ret;
reg_data = WCN36XX_DXE_REG_RESET;
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_REG_CSR_RESET, reg_data);
/* Setting interrupt path */
reg_data = WCN36XX_DXE_CCU_INT;
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_REG_CCU_INT, reg_data);
/***************************************/
/* Init descriptors for TX LOW channel */
/***************************************/
wcn36xx_dxe_init_descs(&wcn->dxe_tx_l_ch);
wcn36xx_dxe_init_tx_bd(&wcn->dxe_tx_l_ch, &wcn->data_mem_pool);
/* Write channel head to a NEXT register */
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_L,
wcn->dxe_tx_l_ch.head_blk_ctl->desc_phy_addr);
/* Program DMA destination addr for TX LOW */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_CH_DEST_ADDR_TX_L,
WCN36XX_DXE_WQ_TX_L);
wcn36xx_dxe_read_register(wcn, WCN36XX_DXE_REG_CH_EN, &reg_data);
wcn36xx_dxe_enable_ch_int(wcn, WCN36XX_INT_MASK_CHAN_TX_L);
/***************************************/
/* Init descriptors for TX HIGH channel */
/***************************************/
wcn36xx_dxe_init_descs(&wcn->dxe_tx_h_ch);
wcn36xx_dxe_init_tx_bd(&wcn->dxe_tx_h_ch, &wcn->mgmt_mem_pool);
/* Write channel head to a NEXT register */
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_H,
wcn->dxe_tx_h_ch.head_blk_ctl->desc_phy_addr);
/* Program DMA destination addr for TX HIGH */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_CH_DEST_ADDR_TX_H,
WCN36XX_DXE_WQ_TX_H);
wcn36xx_dxe_read_register(wcn, WCN36XX_DXE_REG_CH_EN, &reg_data);
/* Enable channel interrupts */
wcn36xx_dxe_enable_ch_int(wcn, WCN36XX_INT_MASK_CHAN_TX_H);
/***************************************/
/* Init descriptors for RX LOW channel */
/***************************************/
wcn36xx_dxe_init_descs(&wcn->dxe_rx_l_ch);
/* For RX we need to preallocated buffers */
wcn36xx_dxe_ch_alloc_skb(wcn, &wcn->dxe_rx_l_ch);
/* Write channel head to a NEXT register */
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_L,
wcn->dxe_rx_l_ch.head_blk_ctl->desc_phy_addr);
/* Write DMA source address */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_CH_SRC_ADDR_RX_L,
WCN36XX_DXE_WQ_RX_L);
/* Program preallocated destination address */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_CH_DEST_ADDR_RX_L,
wcn->dxe_rx_l_ch.head_blk_ctl->desc->phy_next_l);
/* Enable default control registers */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_REG_CTL_RX_L,
WCN36XX_DXE_CH_DEFAULT_CTL_RX_L);
/* Enable channel interrupts */
wcn36xx_dxe_enable_ch_int(wcn, WCN36XX_INT_MASK_CHAN_RX_L);
/***************************************/
/* Init descriptors for RX HIGH channel */
/***************************************/
wcn36xx_dxe_init_descs(&wcn->dxe_rx_h_ch);
/* For RX we need to prealocat buffers */
wcn36xx_dxe_ch_alloc_skb(wcn, &wcn->dxe_rx_h_ch);
/* Write chanel head to a NEXT register */
wcn36xx_dxe_write_register(wcn, WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_H,
wcn->dxe_rx_h_ch.head_blk_ctl->desc_phy_addr);
/* Write DMA source address */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_CH_SRC_ADDR_RX_H,
WCN36XX_DXE_WQ_RX_H);
/* Program preallocated destination address */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_CH_DEST_ADDR_RX_H,
wcn->dxe_rx_h_ch.head_blk_ctl->desc->phy_next_l);
/* Enable default control registers */
wcn36xx_dxe_write_register(wcn,
WCN36XX_DXE_REG_CTL_RX_H,
WCN36XX_DXE_CH_DEFAULT_CTL_RX_H);
/* Enable channel interrupts */
wcn36xx_dxe_enable_ch_int(wcn, WCN36XX_INT_MASK_CHAN_RX_H);
ret = wcn36xx_dxe_request_irqs(wcn);
if (ret < 0)
goto out_err;
return 0;
out_err:
return ret;
}
void wcn36xx_dxe_deinit(struct wcn36xx *wcn)
{
free_irq(wcn->tx_irq, wcn);
free_irq(wcn->rx_irq, wcn);
if (wcn->tx_ack_skb) {
ieee80211_tx_status_irqsafe(wcn->hw, wcn->tx_ack_skb);
wcn->tx_ack_skb = NULL;
}
wcn36xx_dxe_ch_free_skbs(wcn, &wcn->dxe_rx_l_ch);
wcn36xx_dxe_ch_free_skbs(wcn, &wcn->dxe_rx_h_ch);
}

284
drivers/net/wireless/ath/wcn36xx/dxe.h Normal file
View File

@ -0,0 +1,284 @@
/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _DXE_H_
#define _DXE_H_
#include "wcn36xx.h"
/*
TX_LOW = DMA0
TX_HIGH = DMA4
RX_LOW = DMA1
RX_HIGH = DMA3
H2H_TEST_RX_TX = DMA2
*/
/* DXE registers */
#define WCN36XX_DXE_MEM_BASE 0x03000000
#define WCN36XX_DXE_MEM_REG 0x202000
#define WCN36XX_DXE_CCU_INT 0xA0011
#define WCN36XX_DXE_REG_CCU_INT 0x200b10
/* TODO This must calculated properly but not hardcoded */
#define WCN36XX_DXE_CTRL_TX_L 0x328a44
#define WCN36XX_DXE_CTRL_TX_H 0x32ce44
#define WCN36XX_DXE_CTRL_RX_L 0x12ad2f
#define WCN36XX_DXE_CTRL_RX_H 0x12d12f
#define WCN36XX_DXE_CTRL_TX_H_BD 0x30ce45
#define WCN36XX_DXE_CTRL_TX_H_SKB 0x32ce4d
#define WCN36XX_DXE_CTRL_TX_L_BD 0x308a45
#define WCN36XX_DXE_CTRL_TX_L_SKB 0x328a4d
/* TODO This must calculated properly but not hardcoded */
#define WCN36XX_DXE_WQ_TX_L 0x17
#define WCN36XX_DXE_WQ_TX_H 0x17
#define WCN36XX_DXE_WQ_RX_L 0xB
#define WCN36XX_DXE_WQ_RX_H 0x4
/* DXE descriptor control filed */
#define WCN36XX_DXE_CTRL_VALID_MASK (0x00000001)
/* TODO This must calculated properly but not hardcoded */
/* DXE default control register values */
#define WCN36XX_DXE_CH_DEFAULT_CTL_RX_L 0x847EAD2F
#define WCN36XX_DXE_CH_DEFAULT_CTL_RX_H 0x84FED12F
#define WCN36XX_DXE_CH_DEFAULT_CTL_TX_H 0x853ECF4D
#define WCN36XX_DXE_CH_DEFAULT_CTL_TX_L 0x843e8b4d
/* Common DXE registers */
#define WCN36XX_DXE_MEM_CSR (WCN36XX_DXE_MEM_REG + 0x00)
#define WCN36XX_DXE_REG_CSR_RESET (WCN36XX_DXE_MEM_REG + 0x00)
#define WCN36XX_DXE_ENCH_ADDR (WCN36XX_DXE_MEM_REG + 0x04)
#define WCN36XX_DXE_REG_CH_EN (WCN36XX_DXE_MEM_REG + 0x08)
#define WCN36XX_DXE_REG_CH_DONE (WCN36XX_DXE_MEM_REG + 0x0C)
#define WCN36XX_DXE_REG_CH_ERR (WCN36XX_DXE_MEM_REG + 0x10)
#define WCN36XX_DXE_INT_MASK_REG (WCN36XX_DXE_MEM_REG + 0x18)
#define WCN36XX_DXE_INT_SRC_RAW_REG (WCN36XX_DXE_MEM_REG + 0x20)
/* #define WCN36XX_DXE_INT_CH6_MASK 0x00000040 */
/* #define WCN36XX_DXE_INT_CH5_MASK 0x00000020 */
#define WCN36XX_DXE_INT_CH4_MASK 0x00000010
#define WCN36XX_DXE_INT_CH3_MASK 0x00000008
/* #define WCN36XX_DXE_INT_CH2_MASK 0x00000004 */
#define WCN36XX_DXE_INT_CH1_MASK 0x00000002
#define WCN36XX_DXE_INT_CH0_MASK 0x00000001
#define WCN36XX_DXE_0_INT_CLR (WCN36XX_DXE_MEM_REG + 0x30)
#define WCN36XX_DXE_0_INT_ED_CLR (WCN36XX_DXE_MEM_REG + 0x34)
#define WCN36XX_DXE_0_INT_DONE_CLR (WCN36XX_DXE_MEM_REG + 0x38)
#define WCN36XX_DXE_0_INT_ERR_CLR (WCN36XX_DXE_MEM_REG + 0x3C)
#define WCN36XX_DXE_0_CH0_STATUS (WCN36XX_DXE_MEM_REG + 0x404)
#define WCN36XX_DXE_0_CH1_STATUS (WCN36XX_DXE_MEM_REG + 0x444)
#define WCN36XX_DXE_0_CH2_STATUS (WCN36XX_DXE_MEM_REG + 0x484)
#define WCN36XX_DXE_0_CH3_STATUS (WCN36XX_DXE_MEM_REG + 0x4C4)
#define WCN36XX_DXE_0_CH4_STATUS (WCN36XX_DXE_MEM_REG + 0x504)
#define WCN36XX_DXE_REG_RESET 0x5c89
/* Temporary BMU Workqueue 4 */
#define WCN36XX_DXE_BMU_WQ_RX_LOW 0xB
#define WCN36XX_DXE_BMU_WQ_RX_HIGH 0x4
/* DMA channel offset */
#define WCN36XX_DXE_TX_LOW_OFFSET 0x400
#define WCN36XX_DXE_TX_HIGH_OFFSET 0x500
#define WCN36XX_DXE_RX_LOW_OFFSET 0x440
#define WCN36XX_DXE_RX_HIGH_OFFSET 0x4C0
/* Address of the next DXE descriptor */
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR 0x001C
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_LOW_OFFSET + \
WCN36XX_DXE_CH_NEXT_DESC_ADDR)
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR_TX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_HIGH_OFFSET + \
WCN36XX_DXE_CH_NEXT_DESC_ADDR)
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET + \
WCN36XX_DXE_CH_NEXT_DESC_ADDR)
#define WCN36XX_DXE_CH_NEXT_DESC_ADDR_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET + \
WCN36XX_DXE_CH_NEXT_DESC_ADDR)
/* DXE Descriptor source address */
#define WCN36XX_DXE_CH_SRC_ADDR 0x000C
#define WCN36XX_DXE_CH_SRC_ADDR_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET + \
WCN36XX_DXE_CH_SRC_ADDR)
#define WCN36XX_DXE_CH_SRC_ADDR_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET + \
WCN36XX_DXE_CH_SRC_ADDR)
/* DXE Descriptor address destination address */
#define WCN36XX_DXE_CH_DEST_ADDR 0x0014
#define WCN36XX_DXE_CH_DEST_ADDR_TX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_LOW_OFFSET + \
WCN36XX_DXE_CH_DEST_ADDR)
#define WCN36XX_DXE_CH_DEST_ADDR_TX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_HIGH_OFFSET + \
WCN36XX_DXE_CH_DEST_ADDR)
#define WCN36XX_DXE_CH_DEST_ADDR_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET + \
WCN36XX_DXE_CH_DEST_ADDR)
#define WCN36XX_DXE_CH_DEST_ADDR_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET + \
WCN36XX_DXE_CH_DEST_ADDR)
/* Interrupt status */
#define WCN36XX_DXE_CH_STATUS_REG_ADDR 0x0004
#define WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_LOW_OFFSET + \
WCN36XX_DXE_CH_STATUS_REG_ADDR)
#define WCN36XX_DXE_CH_STATUS_REG_ADDR_TX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_HIGH_OFFSET + \
WCN36XX_DXE_CH_STATUS_REG_ADDR)
#define WCN36XX_DXE_CH_STATUS_REG_ADDR_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET + \
WCN36XX_DXE_CH_STATUS_REG_ADDR)
#define WCN36XX_DXE_CH_STATUS_REG_ADDR_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET + \
WCN36XX_DXE_CH_STATUS_REG_ADDR)
/* DXE default control register */
#define WCN36XX_DXE_REG_CTL_RX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_LOW_OFFSET)
#define WCN36XX_DXE_REG_CTL_RX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_RX_HIGH_OFFSET)
#define WCN36XX_DXE_REG_CTL_TX_H (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_HIGH_OFFSET)
#define WCN36XX_DXE_REG_CTL_TX_L (WCN36XX_DXE_MEM_REG + \
WCN36XX_DXE_TX_LOW_OFFSET)
#define WCN36XX_SMSM_WLAN_TX_ENABLE 0x00000400
#define WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY 0x00000200
/* Interrupt control channel mask */
#define WCN36XX_INT_MASK_CHAN_TX_L 0x00000001
#define WCN36XX_INT_MASK_CHAN_RX_L 0x00000002
#define WCN36XX_INT_MASK_CHAN_RX_H 0x00000008
#define WCN36XX_INT_MASK_CHAN_TX_H 0x00000010
#define WCN36XX_BD_CHUNK_SIZE 128
#define WCN36XX_PKT_SIZE 0xF20
enum wcn36xx_dxe_ch_type {
WCN36XX_DXE_CH_TX_L,
WCN36XX_DXE_CH_TX_H,
WCN36XX_DXE_CH_RX_L,
WCN36XX_DXE_CH_RX_H
};
/* amount of descriptors per channel */
enum wcn36xx_dxe_ch_desc_num {
WCN36XX_DXE_CH_DESC_NUMB_TX_L = 128,
WCN36XX_DXE_CH_DESC_NUMB_TX_H = 10,
WCN36XX_DXE_CH_DESC_NUMB_RX_L = 512,
WCN36XX_DXE_CH_DESC_NUMB_RX_H = 40
};
/**
* struct wcn36xx_dxe_desc - describes descriptor of one DXE buffer
*
* @ctrl: is a union that consists of following bits:
* union {
* u32 valid :1; //0 = DMA stop, 1 = DMA continue with this
* //descriptor
* u32 transfer_type :2; //0 = Host to Host space
* u32 eop :1; //End of Packet
* u32 bd_handling :1; //if transferType = Host to BMU, then 0
* // means first 128 bytes contain BD, and 1
* // means create new empty BD
* u32 siq :1; // SIQ
* u32 diq :1; // DIQ
* u32 pdu_rel :1; //0 = don't release BD and PDUs when done,
* // 1 = release them
* u32 bthld_sel :4; //BMU Threshold Select
* u32 prio :3; //Specifies the priority level to use for
* // the transfer
* u32 stop_channel :1; //1 = DMA stops processing further, channel
* //requires re-enabling after this
* u32 intr :1; //Interrupt on Descriptor Done
* u32 rsvd :1; //reserved
* u32 size :14;//14 bits used - ignored for BMU transfers,
* //only used for host to host transfers?
* } ctrl;
*/
struct wcn36xx_dxe_desc {
u32 ctrl;
u32 fr_len;
u32 src_addr_l;
u32 dst_addr_l;
u32 phy_next_l;
u32 src_addr_h;
u32 dst_addr_h;
u32 phy_next_h;
} __packed;
/* DXE Control block */
struct wcn36xx_dxe_ctl {
struct wcn36xx_dxe_ctl *next;
struct wcn36xx_dxe_desc *desc;
unsigned int desc_phy_addr;
int ctl_blk_order;
struct sk_buff *skb;
spinlock_t skb_lock;
void *bd_cpu_addr;
dma_addr_t bd_phy_addr;
};
struct wcn36xx_dxe_ch {
enum wcn36xx_dxe_ch_type ch_type;
void *cpu_addr;
dma_addr_t dma_addr;
enum wcn36xx_dxe_ch_desc_num desc_num;
/* DXE control block ring */
struct wcn36xx_dxe_ctl *head_blk_ctl;
struct wcn36xx_dxe_ctl *tail_blk_ctl;
/* DXE channel specific configs */
u32 dxe_wq;
u32 ctrl_bd;
u32 ctrl_skb;
u32 reg_ctrl;
u32 def_ctrl;
};
/* Memory Pool for BD headers */
struct wcn36xx_dxe_mem_pool {
int chunk_size;
void *virt_addr;
dma_addr_t phy_addr;
};
struct wcn36xx_vif;
int wcn36xx_dxe_allocate_mem_pools(struct wcn36xx *wcn);
void wcn36xx_dxe_free_mem_pools(struct wcn36xx *wcn);
void wcn36xx_dxe_rx_frame(struct wcn36xx *wcn);
int wcn36xx_dxe_alloc_ctl_blks(struct wcn36xx *wcn);
void wcn36xx_dxe_free_ctl_blks(struct wcn36xx *wcn);
int wcn36xx_dxe_init(struct wcn36xx *wcn);
void wcn36xx_dxe_deinit(struct wcn36xx *wcn);
int wcn36xx_dxe_init_channels(struct wcn36xx *wcn);
int wcn36xx_dxe_tx_frame(struct wcn36xx *wcn,
struct wcn36xx_vif *vif_priv,
struct sk_buff *skb,
bool is_low);
void wcn36xx_dxe_tx_ack_ind(struct wcn36xx *wcn, u32 status);
void *wcn36xx_dxe_get_next_bd(struct wcn36xx *wcn, bool is_low);
#endif /* _DXE_H_ */

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/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "wcn36xx.h"
int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,
struct ieee80211_vif *vif)
{
int ret = 0;
struct wcn36xx_vif *vif_priv = (struct wcn36xx_vif *)vif->drv_priv;
/* TODO: Make sure the TX chain clean */
ret = wcn36xx_smd_enter_bmps(wcn, vif);
if (!ret) {
wcn36xx_dbg(WCN36XX_DBG_PMC, "Entered BMPS\n");
vif_priv->pw_state = WCN36XX_BMPS;
} else {
/*
* One of the reasons why HW will not enter BMPS is because
* driver is trying to enter bmps before first beacon was
* received just after auth complete
*/
wcn36xx_err("Can not enter BMPS!\n");
}
return ret;
}
int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn,
struct ieee80211_vif *vif)
{
struct wcn36xx_vif *vif_priv = (struct wcn36xx_vif *)vif->drv_priv;
if (WCN36XX_BMPS != vif_priv->pw_state) {
wcn36xx_err("Not in BMPS mode, no need to exit from BMPS mode!\n");
return -EINVAL;
}
wcn36xx_smd_exit_bmps(wcn, vif);
vif_priv->pw_state = WCN36XX_FULL_POWER;
return 0;
}
int wcn36xx_enable_keep_alive_null_packet(struct wcn36xx *wcn,
struct ieee80211_vif *vif)
{
wcn36xx_dbg(WCN36XX_DBG_PMC, "%s\n", __func__);
return wcn36xx_smd_keep_alive_req(wcn, vif,
WCN36XX_HAL_KEEP_ALIVE_NULL_PKT);
}

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/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _WCN36XX_PMC_H_
#define _WCN36XX_PMC_H_
struct wcn36xx;
enum wcn36xx_power_state {
WCN36XX_FULL_POWER,
WCN36XX_BMPS
};
int wcn36xx_pmc_enter_bmps_state(struct wcn36xx *wcn,
struct ieee80211_vif *vif);
int wcn36xx_pmc_exit_bmps_state(struct wcn36xx *wcn,
struct ieee80211_vif *vif);
int wcn36xx_enable_keep_alive_null_packet(struct wcn36xx *wcn,
struct ieee80211_vif *vif);
#endif /* _WCN36XX_PMC_H_ */

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/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _SMD_H_
#define _SMD_H_
#include "wcn36xx.h"
/* Max shared size is 4k but we take less.*/
#define WCN36XX_NV_FRAGMENT_SIZE 3072
#define WCN36XX_HAL_BUF_SIZE 4096
#define HAL_MSG_TIMEOUT 200
#define WCN36XX_SMSM_WLAN_TX_ENABLE 0x00000400
#define WCN36XX_SMSM_WLAN_TX_RINGS_EMPTY 0x00000200
/* The PNO version info be contained in the rsp msg */
#define WCN36XX_FW_MSG_PNO_VERSION_MASK 0x8000
enum wcn36xx_fw_msg_result {
WCN36XX_FW_MSG_RESULT_SUCCESS = 0,
WCN36XX_FW_MSG_RESULT_SUCCESS_SYNC = 1,
WCN36XX_FW_MSG_RESULT_MEM_FAIL = 5,
};
/******************************/
/* SMD requests and responses */
/******************************/
struct wcn36xx_fw_msg_status_rsp {
u32 status;
} __packed;
struct wcn36xx_hal_ind_msg {
struct list_head list;
u8 *msg;
size_t msg_len;
};
struct wcn36xx;
int wcn36xx_smd_open(struct wcn36xx *wcn);
void wcn36xx_smd_close(struct wcn36xx *wcn);
int wcn36xx_smd_load_nv(struct wcn36xx *wcn);
int wcn36xx_smd_start(struct wcn36xx *wcn);
int wcn36xx_smd_stop(struct wcn36xx *wcn);
int wcn36xx_smd_init_scan(struct wcn36xx *wcn, enum wcn36xx_hal_sys_mode mode);
int wcn36xx_smd_start_scan(struct wcn36xx *wcn);
int wcn36xx_smd_end_scan(struct wcn36xx *wcn);
int wcn36xx_smd_finish_scan(struct wcn36xx *wcn,
enum wcn36xx_hal_sys_mode mode);
int wcn36xx_smd_update_scan_params(struct wcn36xx *wcn);
int wcn36xx_smd_add_sta_self(struct wcn36xx *wcn, struct ieee80211_vif *vif);
int wcn36xx_smd_delete_sta_self(struct wcn36xx *wcn, u8 *addr);
int wcn36xx_smd_delete_sta(struct wcn36xx *wcn, u8 sta_index);
int wcn36xx_smd_join(struct wcn36xx *wcn, const u8 *bssid, u8 *vif, u8 ch);
int wcn36xx_smd_set_link_st(struct wcn36xx *wcn, const u8 *bssid,
const u8 *sta_mac,
enum wcn36xx_hal_link_state state);
int wcn36xx_smd_config_bss(struct wcn36xx *wcn, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, const u8 *bssid,
bool update);
int wcn36xx_smd_delete_bss(struct wcn36xx *wcn, struct ieee80211_vif *vif);
int wcn36xx_smd_config_sta(struct wcn36xx *wcn, struct ieee80211_vif *vif,
struct ieee80211_sta *sta);
int wcn36xx_smd_send_beacon(struct wcn36xx *wcn, struct ieee80211_vif *vif,
struct sk_buff *skb_beacon, u16 tim_off,
u16 p2p_off);
int wcn36xx_smd_switch_channel(struct wcn36xx *wcn,
struct ieee80211_vif *vif, int ch);
int wcn36xx_smd_update_proberesp_tmpl(struct wcn36xx *wcn,
struct ieee80211_vif *vif,
struct sk_buff *skb);
int wcn36xx_smd_set_stakey(struct wcn36xx *wcn,
enum ani_ed_type enc_type,
u8 keyidx,
u8 keylen,
u8 *key,
u8 sta_index);
int wcn36xx_smd_set_bsskey(struct wcn36xx *wcn,
enum ani_ed_type enc_type,
u8 keyidx,
u8 keylen,
u8 *key);
int wcn36xx_smd_remove_stakey(struct wcn36xx *wcn,
enum ani_ed_type enc_type,
u8 keyidx,
u8 sta_index);
int wcn36xx_smd_remove_bsskey(struct wcn36xx *wcn,
enum ani_ed_type enc_type,
u8 keyidx);
int wcn36xx_smd_enter_bmps(struct wcn36xx *wcn, struct ieee80211_vif *vif);
int wcn36xx_smd_exit_bmps(struct wcn36xx *wcn, struct ieee80211_vif *vif);
int wcn36xx_smd_set_power_params(struct wcn36xx *wcn, bool ignore_dtim);
int wcn36xx_smd_keep_alive_req(struct wcn36xx *wcn,
struct ieee80211_vif *vif,
int packet_type);
int wcn36xx_smd_dump_cmd_req(struct wcn36xx *wcn, u32 arg1, u32 arg2,
u32 arg3, u32 arg4, u32 arg5);
int wcn36xx_smd_feature_caps_exchange(struct wcn36xx *wcn);
int wcn36xx_smd_add_ba_session(struct wcn36xx *wcn,
struct ieee80211_sta *sta,
u16 tid,
u16 *ssn,
u8 direction,
u8 sta_index);
int wcn36xx_smd_add_ba(struct wcn36xx *wcn);
int wcn36xx_smd_del_ba(struct wcn36xx *wcn, u16 tid, u8 sta_index);
int wcn36xx_smd_trigger_ba(struct wcn36xx *wcn, u8 sta_index);
int wcn36xx_smd_update_cfg(struct wcn36xx *wcn, u32 cfg_id, u32 value);
#endif /* _SMD_H_ */

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/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "txrx.h"
static inline int get_rssi0(struct wcn36xx_rx_bd *bd)
{
return 100 - ((bd->phy_stat0 >> 24) & 0xff);
}
int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
{
struct ieee80211_rx_status status;
struct ieee80211_hdr *hdr;
struct wcn36xx_rx_bd *bd;
u16 fc, sn;
/*
* All fields must be 0, otherwise it can lead to
* unexpected consequences.
*/
memset(&status, 0, sizeof(status));
bd = (struct wcn36xx_rx_bd *)skb->data;
buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP,
"BD <<< ", (char *)bd,
sizeof(struct wcn36xx_rx_bd));
skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);
skb_pull(skb, bd->pdu.mpdu_header_off);
status.mactime = 10;
status.freq = WCN36XX_CENTER_FREQ(wcn);
status.band = WCN36XX_BAND(wcn);
status.signal = -get_rssi0(bd);
status.antenna = 1;
status.rate_idx = 1;
status.flag = 0;
status.rx_flags = 0;
status.flag |= RX_FLAG_IV_STRIPPED |
RX_FLAG_MMIC_STRIPPED |
RX_FLAG_DECRYPTED;
wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x status->vendor_radiotap_len=%x\n",
status.flag, status.vendor_radiotap_len);
memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
hdr = (struct ieee80211_hdr *) skb->data;
fc = __le16_to_cpu(hdr->frame_control);
sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));
if (ieee80211_is_beacon(hdr->frame_control)) {
wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",
skb, skb->len, fc, sn);
wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",
(char *)skb->data, skb->len);
} else {
wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n",
skb, skb->len, fc, sn);
wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",
(char *)skb->data, skb->len);
}
ieee80211_rx_irqsafe(wcn->hw, skb);
return 0;
}
static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd,
u32 mpdu_header_len,
u32 len,
u16 tid)
{
bd->pdu.mpdu_header_len = mpdu_header_len;
bd->pdu.mpdu_header_off = sizeof(*bd);
bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len +
bd->pdu.mpdu_header_off;
bd->pdu.mpdu_len = len;
bd->pdu.tid = tid;
}
static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn,
u8 *addr)
{
struct wcn36xx_vif *vif_priv = NULL;
struct ieee80211_vif *vif = NULL;
list_for_each_entry(vif_priv, &wcn->vif_list, list) {
vif = container_of((void *)vif_priv,
struct ieee80211_vif,
drv_priv);
if (memcmp(vif->addr, addr, ETH_ALEN) == 0)
return vif_priv;
}
wcn36xx_warn("vif %pM not found\n", addr);
return NULL;
}
static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd,
struct wcn36xx *wcn,
struct wcn36xx_vif **vif_priv,
struct wcn36xx_sta *sta_priv,
struct ieee80211_hdr *hdr,
bool bcast)
{
struct ieee80211_vif *vif = NULL;
struct wcn36xx_vif *__vif_priv = NULL;
bd->bd_rate = WCN36XX_BD_RATE_DATA;
/*
* For not unicast frames mac80211 will not set sta pointer so use
* self_sta_index instead.
*/
if (sta_priv) {
__vif_priv = sta_priv->vif;
vif = container_of((void *)__vif_priv,
struct ieee80211_vif,
drv_priv);
if (vif->type == NL80211_IFTYPE_STATION) {
bd->sta_index = sta_priv->bss_sta_index;
bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index;
} else if (vif->type == NL80211_IFTYPE_AP ||
vif->type == NL80211_IFTYPE_ADHOC ||
vif->type == NL80211_IFTYPE_MESH_POINT) {
bd->sta_index = sta_priv->sta_index;
bd->dpu_desc_idx = sta_priv->dpu_desc_index;
}
} else {
__vif_priv = get_vif_by_addr(wcn, hdr->addr2);
bd->sta_index = __vif_priv->self_sta_index;
bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
}
bd->dpu_sign = __vif_priv->ucast_dpu_signature;
if (ieee80211_is_nullfunc(hdr->frame_control) ||
(sta_priv && !sta_priv->is_data_encrypted))
bd->dpu_ne = 1;
if (bcast) {
bd->ub = 1;
bd->ack_policy = 1;
}
*vif_priv = __vif_priv;
}
static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd,
struct wcn36xx *wcn,
struct wcn36xx_vif **vif_priv,
struct ieee80211_hdr *hdr,
bool bcast)
{
struct wcn36xx_vif *__vif_priv =
get_vif_by_addr(wcn, hdr->addr2);
bd->sta_index = __vif_priv->self_sta_index;
bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;
bd->dpu_ne = 1;
/* default rate for unicast */
if (ieee80211_is_mgmt(hdr->frame_control))
bd->bd_rate = (WCN36XX_BAND(wcn) == IEEE80211_BAND_5GHZ) ?
WCN36XX_BD_RATE_CTRL :
WCN36XX_BD_RATE_MGMT;
else if (ieee80211_is_ctl(hdr->frame_control))
bd->bd_rate = WCN36XX_BD_RATE_CTRL;
else
wcn36xx_warn("frame control type unknown\n");
/*
* In joining state trick hardware that probe is sent as
* unicast even if address is broadcast.
*/
if (__vif_priv->is_joining &&
ieee80211_is_probe_req(hdr->frame_control))
bcast = false;
if (bcast) {
/* broadcast */
bd->ub = 1;
/* No ack needed not unicast */
bd->ack_policy = 1;
bd->queue_id = WCN36XX_TX_B_WQ_ID;
} else
bd->queue_id = WCN36XX_TX_U_WQ_ID;
*vif_priv = __vif_priv;
}
int wcn36xx_start_tx(struct wcn36xx *wcn,
struct wcn36xx_sta *sta_priv,
struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct wcn36xx_vif *vif_priv = NULL;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
unsigned long flags;
bool is_low = ieee80211_is_data(hdr->frame_control);
bool bcast = is_broadcast_ether_addr(hdr->addr1) ||
is_multicast_ether_addr(hdr->addr1);
struct wcn36xx_tx_bd *bd = wcn36xx_dxe_get_next_bd(wcn, is_low);
if (!bd) {
/*
* TX DXE are used in pairs. One for the BD and one for the
* actual frame. The BD DXE's has a preallocated buffer while
* the skb ones does not. If this isn't true something is really
* wierd. TODO: Recover from this situation
*/
wcn36xx_err("bd address may not be NULL for BD DXE\n");
return -EINVAL;
}
memset(bd, 0, sizeof(*bd));
wcn36xx_dbg(WCN36XX_DBG_TX,
"tx skb %p len %d fc %04x sn %d %s %s\n",
skb, skb->len, __le16_to_cpu(hdr->frame_control),
IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),
is_low ? "low" : "high", bcast ? "bcast" : "ucast");
wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len);
bd->dpu_rf = WCN36XX_BMU_WQ_TX;
bd->tx_comp = info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS;
if (bd->tx_comp) {
wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");
spin_lock_irqsave(&wcn->dxe_lock, flags);
if (wcn->tx_ack_skb) {
spin_unlock_irqrestore(&wcn->dxe_lock, flags);
wcn36xx_warn("tx_ack_skb already set\n");
return -EINVAL;
}
wcn->tx_ack_skb = skb;
spin_unlock_irqrestore(&wcn->dxe_lock, flags);
/* Only one at a time is supported by fw. Stop the TX queues
* until the ack status gets back.
*
* TODO: Add watchdog in case FW does not answer
*/
ieee80211_stop_queues(wcn->hw);
}
/* Data frames served first*/
if (is_low) {
wcn36xx_set_tx_data(bd, wcn, &vif_priv, sta_priv, hdr, bcast);
wcn36xx_set_tx_pdu(bd,
ieee80211_is_data_qos(hdr->frame_control) ?
sizeof(struct ieee80211_qos_hdr) :
sizeof(struct ieee80211_hdr_3addr),
skb->len, sta_priv ? sta_priv->tid : 0);
} else {
/* MGMT and CTRL frames are handeld here*/
wcn36xx_set_tx_mgmt(bd, wcn, &vif_priv, hdr, bcast);
wcn36xx_set_tx_pdu(bd,
ieee80211_is_data_qos(hdr->frame_control) ?
sizeof(struct ieee80211_qos_hdr) :
sizeof(struct ieee80211_hdr_3addr),
skb->len, WCN36XX_TID);
}
buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32));
bd->tx_bd_sign = 0xbdbdbdbd;
return wcn36xx_dxe_tx_frame(wcn, vif_priv, skb, is_low);
}

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/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _TXRX_H_
#define _TXRX_H_
#include <linux/etherdevice.h>
#include "wcn36xx.h"
/* TODO describe all properties */
#define WCN36XX_802_11_HEADER_LEN 24
#define WCN36XX_BMU_WQ_TX 25
#define WCN36XX_TID 7
/* broadcast wq ID */
#define WCN36XX_TX_B_WQ_ID 0xA
#define WCN36XX_TX_U_WQ_ID 0x9
/* bd_rate */
#define WCN36XX_BD_RATE_DATA 0
#define WCN36XX_BD_RATE_MGMT 2
#define WCN36XX_BD_RATE_CTRL 3
struct wcn36xx_pdu {
u32 dpu_fb:8;
u32 adu_fb:8;
u32 pdu_id:16;
/* 0x04*/
u32 tail_pdu_idx:16;
u32 head_pdu_idx:16;
/* 0x08*/
u32 pdu_count:7;
u32 mpdu_data_off:9;
u32 mpdu_header_off:8;
u32 mpdu_header_len:8;
/* 0x0c*/
u32 reserved4:8;
u32 tid:4;
u32 reserved3:4;
u32 mpdu_len:16;
};
struct wcn36xx_rx_bd {
u32 bdt:2;
u32 ft:1;
u32 dpu_ne:1;
u32 rx_key_id:3;
u32 ub:1;
u32 rmf:1;
u32 uma_bypass:1;
u32 csr11:1;
u32 reserved0:1;
u32 scan_learn:1;
u32 rx_ch:4;
u32 rtsf:1;
u32 bsf:1;
u32 a2hf:1;
u32 st_auf:1;
u32 dpu_sign:3;
u32 dpu_rf:8;
struct wcn36xx_pdu pdu;
/* 0x14*/
u32 addr3:8;
u32 addr2:8;
u32 addr1:8;
u32 dpu_desc_idx:8;
/* 0x18*/
u32 rxp_flags:23;
u32 rate_id:9;
u32 phy_stat0;
u32 phy_stat1;
/* 0x24 */
u32 rx_times;
u32 pmi_cmd[6];
/* 0x40 */
u32 reserved7:4;
u32 reorder_slot_id:6;
u32 reorder_fwd_id:6;
u32 reserved6:12;
u32 reorder_code:4;
/* 0x44 */
u32 exp_seq_num:12;
u32 cur_seq_num:12;
u32 fr_type_subtype:8;
/* 0x48 */
u32 msdu_size:16;
u32 sub_fr_id:4;
u32 proc_order:4;
u32 reserved9:4;
u32 aef:1;
u32 lsf:1;
u32 esf:1;
u32 asf:1;
};
struct wcn36xx_tx_bd {
u32 bdt:2;
u32 ft:1;
u32 dpu_ne:1;
u32 fw_tx_comp:1;
u32 tx_comp:1;
u32 reserved1:1;
u32 ub:1;
u32 rmf:1;
u32 reserved0:12;
u32 dpu_sign:3;
u32 dpu_rf:8;
struct wcn36xx_pdu pdu;
/* 0x14*/
u32 reserved5:7;
u32 queue_id:5;
u32 bd_rate:2;
u32 ack_policy:2;
u32 sta_index:8;
u32 dpu_desc_idx:8;
u32 tx_bd_sign;
u32 reserved6;
u32 dxe_start_time;
u32 dxe_end_time;
/*u32 tcp_udp_start_off:10;
u32 header_cks:16;
u32 reserved7:6;*/
};
struct wcn36xx_sta;
struct wcn36xx;
int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb);
int wcn36xx_start_tx(struct wcn36xx *wcn,
struct wcn36xx_sta *sta_priv,
struct sk_buff *skb);
#endif /* _TXRX_H_ */

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/*
* Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _WCN36XX_H_
#define _WCN36XX_H_
#include <linux/completion.h>
#include <linux/printk.h>
#include <linux/spinlock.h>
#include <net/mac80211.h>
#include "hal.h"
#include "smd.h"
#include "txrx.h"
#include "dxe.h"
#include "pmc.h"
#include "debug.h"
#define WLAN_NV_FILE "wlan/prima/WCNSS_qcom_wlan_nv.bin"
#define WCN36XX_AGGR_BUFFER_SIZE 64
extern unsigned int wcn36xx_dbg_mask;
enum wcn36xx_debug_mask {
WCN36XX_DBG_DXE = 0x00000001,
WCN36XX_DBG_DXE_DUMP = 0x00000002,
WCN36XX_DBG_SMD = 0x00000004,
WCN36XX_DBG_SMD_DUMP = 0x00000008,
WCN36XX_DBG_RX = 0x00000010,
WCN36XX_DBG_RX_DUMP = 0x00000020,
WCN36XX_DBG_TX = 0x00000040,
WCN36XX_DBG_TX_DUMP = 0x00000080,
WCN36XX_DBG_HAL = 0x00000100,
WCN36XX_DBG_HAL_DUMP = 0x00000200,
WCN36XX_DBG_MAC = 0x00000400,
WCN36XX_DBG_BEACON = 0x00000800,
WCN36XX_DBG_BEACON_DUMP = 0x00001000,
WCN36XX_DBG_PMC = 0x00002000,
WCN36XX_DBG_PMC_DUMP = 0x00004000,
WCN36XX_DBG_ANY = 0xffffffff,
};
#define wcn36xx_err(fmt, arg...) \
printk(KERN_ERR pr_fmt("ERROR " fmt), ##arg);
#define wcn36xx_warn(fmt, arg...) \
printk(KERN_WARNING pr_fmt("WARNING " fmt), ##arg)
#define wcn36xx_info(fmt, arg...) \
printk(KERN_INFO pr_fmt(fmt), ##arg)
#define wcn36xx_dbg(mask, fmt, arg...) do { \
if (wcn36xx_dbg_mask & mask) \
printk(KERN_DEBUG pr_fmt(fmt), ##arg); \
} while (0)
#define wcn36xx_dbg_dump(mask, prefix_str, buf, len) do { \
if (wcn36xx_dbg_mask & mask) \
print_hex_dump(KERN_DEBUG, pr_fmt(prefix_str), \
DUMP_PREFIX_OFFSET, 32, 1, \
buf, len, false); \
} while (0)
#define WCN36XX_HW_CHANNEL(__wcn) (__wcn->hw->conf.chandef.chan->hw_value)
#define WCN36XX_BAND(__wcn) (__wcn->hw->conf.chandef.chan->band)
#define WCN36XX_CENTER_FREQ(__wcn) (__wcn->hw->conf.chandef.chan->center_freq)
#define WCN36XX_LISTEN_INTERVAL(__wcn) (__wcn->hw->conf.listen_interval)
#define WCN36XX_FLAGS(__wcn) (__wcn->hw->flags)
#define WCN36XX_MAX_POWER(__wcn) (__wcn->hw->conf.chandef.chan->max_power)
static inline void buff_to_be(u32 *buf, size_t len)
{
int i;
for (i = 0; i < len; i++)
buf[i] = cpu_to_be32(buf[i]);
}
struct nv_data {
int is_valid;
u8 table;
};
/* Interface for platform control path
*
* @open: hook must be called when wcn36xx wants to open control channel.
* @tx: sends a buffer.
*/
struct wcn36xx_platform_ctrl_ops {
int (*open)(void *drv_priv, void *rsp_cb);
void (*close)(void);
int (*tx)(char *buf, size_t len);
int (*get_hw_mac)(u8 *addr);
int (*smsm_change_state)(u32 clear_mask, u32 set_mask);
};
/**
* struct wcn36xx_vif - holds VIF related fields
*
* @bss_index: bss_index is initially set to 0xFF. bss_index is received from
* HW after first config_bss call and must be used in delete_bss and
* enter/exit_bmps.
*/
struct wcn36xx_vif {
struct list_head list;
struct wcn36xx_sta *sta;
u8 dtim_period;
enum ani_ed_type encrypt_type;
bool is_joining;
struct wcn36xx_hal_mac_ssid ssid;
/* Power management */
enum wcn36xx_power_state pw_state;
u8 bss_index;
u8 ucast_dpu_signature;
/* Returned from WCN36XX_HAL_ADD_STA_SELF_RSP */
u8 self_sta_index;
u8 self_dpu_desc_index;
};
/**
* struct wcn36xx_sta - holds STA related fields
*
* @tid: traffic ID that is used during AMPDU and in TX BD.
* @sta_index: STA index is returned from HW after config_sta call and is
* used in both SMD channel and TX BD.
* @dpu_desc_index: DPU descriptor index is returned from HW after config_sta
* call and is used in TX BD.
* @bss_sta_index: STA index is returned from HW after config_bss call and is
* used in both SMD channel and TX BD. See table bellow when it is used.
* @bss_dpu_desc_index: DPU descriptor index is returned from HW after
* config_bss call and is used in TX BD.
* ______________________________________________
* | | STA | AP |
* |______________|_____________|_______________|
* | TX BD |bss_sta_index| sta_index |
* |______________|_____________|_______________|
* |all SMD calls |bss_sta_index| sta_index |
* |______________|_____________|_______________|
* |smd_delete_sta| sta_index | sta_index |
* |______________|_____________|_______________|
*/
struct wcn36xx_sta {
struct wcn36xx_vif *vif;
u16 aid;
u16 tid;
u8 sta_index;
u8 dpu_desc_index;
u8 bss_sta_index;
u8 bss_dpu_desc_index;
bool is_data_encrypted;
/* Rates */
struct wcn36xx_hal_supported_rates supported_rates;
};
struct wcn36xx_dxe_ch;
struct wcn36xx {
struct ieee80211_hw *hw;
struct device *dev;
struct list_head vif_list;
u8 fw_revision;
u8 fw_version;
u8 fw_minor;
u8 fw_major;
/* extra byte for the NULL termination */
u8 crm_version[WCN36XX_HAL_VERSION_LENGTH + 1];
u8 wlan_version[WCN36XX_HAL_VERSION_LENGTH + 1];
/* IRQs */
int tx_irq;
int rx_irq;
void __iomem *mmio;
struct wcn36xx_platform_ctrl_ops *ctrl_ops;
/*
* smd_buf must be protected with smd_mutex to garantee
* that all messages are sent one after another
*/
u8 *hal_buf;
size_t hal_rsp_len;
struct mutex hal_mutex;
struct completion hal_rsp_compl;
struct workqueue_struct *hal_ind_wq;
struct work_struct hal_ind_work;
struct mutex hal_ind_mutex;
struct list_head hal_ind_queue;
/* DXE channels */
struct wcn36xx_dxe_ch dxe_tx_l_ch; /* TX low */
struct wcn36xx_dxe_ch dxe_tx_h_ch; /* TX high */
struct wcn36xx_dxe_ch dxe_rx_l_ch; /* RX low */
struct wcn36xx_dxe_ch dxe_rx_h_ch; /* RX high */
/* For synchronization of DXE resources from BH, IRQ and WQ contexts */
spinlock_t dxe_lock;
bool queues_stopped;
/* Memory pools */
struct wcn36xx_dxe_mem_pool mgmt_mem_pool;
struct wcn36xx_dxe_mem_pool data_mem_pool;
struct sk_buff *tx_ack_skb;
#ifdef CONFIG_WCN36XX_DEBUGFS
/* Debug file system entry */
struct wcn36xx_dfs_entry dfs;
#endif /* CONFIG_WCN36XX_DEBUGFS */
};
static inline bool wcn36xx_is_fw_version(struct wcn36xx *wcn,
u8 major,
u8 minor,
u8 version,
u8 revision)
{
return (wcn->fw_major == major &&
wcn->fw_minor == minor &&
wcn->fw_version == version &&
wcn->fw_revision == revision);
}
void wcn36xx_set_default_rates(struct wcn36xx_hal_supported_rates *rates);
#endif /* _WCN36XX_H_ */