blob: 11e6d9d22eae47faa34a51c813238f2acd1a1eea [file] [log] [blame]
/*
* Copyright (c) 2012 Qualcomm Atheros, Inc.
*
* 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.
*/
#include <linux/moduleparam.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include "wil6210.h"
#include "txrx.h"
static bool no_fw_recovery;
module_param(no_fw_recovery, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(no_fw_recovery, " disable FW error recovery");
/*
* Due to a hardware issue,
* one has to read/write to/from NIC in 32-bit chunks;
* regular memcpy_fromio and siblings will
* not work on 64-bit platform - it uses 64-bit transactions
*
* Force 32-bit transactions to enable NIC on 64-bit platforms
*
* To avoid byte swap on big endian host, __raw_{read|write}l
* should be used - {read|write}l would swap bytes to provide
* little endian on PCI value in host endianness.
*/
void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
size_t count)
{
u32 *d = dst;
const volatile u32 __iomem *s = src;
/* size_t is unsigned, if (count%4 != 0) it will wrap */
for (count += 4; count > 4; count -= 4)
*d++ = __raw_readl(s++);
}
void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
size_t count)
{
volatile u32 __iomem *d = dst;
const u32 *s = src;
for (count += 4; count > 4; count -= 4)
__raw_writel(*s++, d++);
}
static void wil_disconnect_cid(struct wil6210_priv *wil, int cid)
{
uint i;
struct wil_sta_info *sta = &wil->sta[cid];
sta->data_port_open = false;
if (sta->status != wil_sta_unused) {
wmi_disconnect_sta(wil, sta->addr, WLAN_REASON_DEAUTH_LEAVING);
sta->status = wil_sta_unused;
}
for (i = 0; i < WIL_STA_TID_NUM; i++) {
struct wil_tid_ampdu_rx *r = sta->tid_rx[i];
sta->tid_rx[i] = NULL;
wil_tid_ampdu_rx_free(wil, r);
}
for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++) {
if (wil->vring2cid_tid[i][0] == cid)
wil_vring_fini_tx(wil, i);
}
memset(&sta->stats, 0, sizeof(sta->stats));
}
static void _wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
{
int cid = -ENOENT;
struct net_device *ndev = wil_to_ndev(wil);
struct wireless_dev *wdev = wil->wdev;
might_sleep();
if (bssid) {
cid = wil_find_cid(wil, bssid);
wil_dbg_misc(wil, "%s(%pM, CID %d)\n", __func__, bssid, cid);
} else {
wil_dbg_misc(wil, "%s(all)\n", __func__);
}
if (cid >= 0) /* disconnect 1 peer */
wil_disconnect_cid(wil, cid);
else /* disconnect all */
for (cid = 0; cid < WIL6210_MAX_CID; cid++)
wil_disconnect_cid(wil, cid);
/* link state */
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
wil_link_off(wil);
if (test_bit(wil_status_fwconnected, &wil->status)) {
clear_bit(wil_status_fwconnected, &wil->status);
cfg80211_disconnected(ndev,
WLAN_STATUS_UNSPECIFIED_FAILURE,
NULL, 0, GFP_KERNEL);
} else if (test_bit(wil_status_fwconnecting, &wil->status)) {
cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
GFP_KERNEL);
}
clear_bit(wil_status_fwconnecting, &wil->status);
break;
default:
/* AP-like interface and monitor:
* never scan, always connected
*/
if (bssid)
cfg80211_del_sta(ndev, bssid, GFP_KERNEL);
break;
}
}
static void wil_disconnect_worker(struct work_struct *work)
{
struct wil6210_priv *wil = container_of(work,
struct wil6210_priv, disconnect_worker);
mutex_lock(&wil->mutex);
_wil6210_disconnect(wil, NULL);
mutex_unlock(&wil->mutex);
}
static void wil_connect_timer_fn(ulong x)
{
struct wil6210_priv *wil = (void *)x;
wil_dbg_misc(wil, "Connect timeout\n");
/* reschedule to thread context - disconnect won't
* run from atomic context
*/
schedule_work(&wil->disconnect_worker);
}
static void wil_scan_timer_fn(ulong x)
{
struct wil6210_priv *wil = (void *)x;
clear_bit(wil_status_fwready, &wil->status);
wil_err(wil, "Scan timeout detected, start fw error recovery\n");
schedule_work(&wil->fw_error_worker);
}
static void wil_fw_error_worker(struct work_struct *work)
{
struct wil6210_priv *wil = container_of(work,
struct wil6210_priv, fw_error_worker);
struct wireless_dev *wdev = wil->wdev;
wil_dbg_misc(wil, "fw error worker\n");
if (no_fw_recovery)
return;
/* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO
* passed since last recovery attempt
*/
if (time_is_after_jiffies(wil->last_fw_recovery +
WIL6210_FW_RECOVERY_TO))
wil->recovery_count++;
else
wil->recovery_count = 1; /* fw was alive for a long time */
if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) {
wil_err(wil, "too many recovery attempts (%d), giving up\n",
wil->recovery_count);
return;
}
wil->last_fw_recovery = jiffies;
mutex_lock(&wil->mutex);
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_MONITOR:
wil_info(wil, "fw error recovery started (try %d)...\n",
wil->recovery_count);
wil_reset(wil);
/* need to re-allocate Rx ring after reset */
wil_rx_init(wil);
break;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_P2P_GO:
/* recovery in these modes is done by upper layers */
break;
default:
break;
}
mutex_unlock(&wil->mutex);
}
static int wil_find_free_vring(struct wil6210_priv *wil)
{
int i;
for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
if (!wil->vring_tx[i].va)
return i;
}
return -EINVAL;
}
static void wil_connect_worker(struct work_struct *work)
{
int rc;
struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
connect_worker);
int cid = wil->pending_connect_cid;
int ringid = wil_find_free_vring(wil);
if (cid < 0) {
wil_err(wil, "No connection pending\n");
return;
}
wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
rc = wil_vring_init_tx(wil, ringid, WIL6210_TX_RING_SIZE, cid, 0);
wil->pending_connect_cid = -1;
if (rc == 0) {
wil->sta[cid].status = wil_sta_connected;
wil_link_on(wil);
} else {
wil->sta[cid].status = wil_sta_unused;
}
}
int wil_priv_init(struct wil6210_priv *wil)
{
wil_dbg_misc(wil, "%s()\n", __func__);
memset(wil->sta, 0, sizeof(wil->sta));
mutex_init(&wil->mutex);
mutex_init(&wil->wmi_mutex);
init_completion(&wil->wmi_ready);
wil->pending_connect_cid = -1;
setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
setup_timer(&wil->scan_timer, wil_scan_timer_fn, (ulong)wil);
INIT_WORK(&wil->connect_worker, wil_connect_worker);
INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
INIT_WORK(&wil->fw_error_worker, wil_fw_error_worker);
INIT_LIST_HEAD(&wil->pending_wmi_ev);
spin_lock_init(&wil->wmi_ev_lock);
wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
if (!wil->wmi_wq)
return -EAGAIN;
wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
if (!wil->wmi_wq_conn) {
destroy_workqueue(wil->wmi_wq);
return -EAGAIN;
}
wil->last_fw_recovery = jiffies;
return 0;
}
void wil6210_disconnect(struct wil6210_priv *wil, const u8 *bssid)
{
del_timer_sync(&wil->connect_timer);
_wil6210_disconnect(wil, bssid);
}
void wil_priv_deinit(struct wil6210_priv *wil)
{
del_timer_sync(&wil->scan_timer);
cancel_work_sync(&wil->disconnect_worker);
cancel_work_sync(&wil->fw_error_worker);
mutex_lock(&wil->mutex);
wil6210_disconnect(wil, NULL);
mutex_unlock(&wil->mutex);
wmi_event_flush(wil);
destroy_workqueue(wil->wmi_wq_conn);
destroy_workqueue(wil->wmi_wq);
}
static void wil_target_reset(struct wil6210_priv *wil)
{
int delay = 0;
u32 hw_state;
u32 rev_id;
wil_dbg_misc(wil, "Resetting...\n");
/* register read */
#define R(a) ioread32(wil->csr + HOSTADDR(a))
/* register write */
#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
/* register set = read, OR, write */
#define S(a, v) W(a, R(a) | v)
/* register clear = read, AND with inverted, write */
#define C(a, v) W(a, R(a) & ~v)
wil->hw_version = R(RGF_USER_FW_REV_ID);
rev_id = wil->hw_version & 0xff;
/* hpal_perst_from_pad_src_n_mask */
S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
/* car_perst_rst_src_n_mask */
S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
wmb(); /* order is important here */
W(RGF_USER_MAC_CPU_0, BIT(1)); /* mac_cpu_man_rst */
W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
wmb(); /* order is important here */
W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
wmb(); /* order is important here */
W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
wmb(); /* order is important here */
W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
if (rev_id == 1) {
W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
} else {
W(RGF_PCIE_LOS_COUNTER_CTL, BIT(6) | BIT(8));
W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00008000);
}
W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
wmb(); /* order is important here */
/* wait until device ready */
do {
msleep(1);
hw_state = R(RGF_USER_HW_MACHINE_STATE);
if (delay++ > 100) {
wil_err(wil, "Reset not completed, hw_state 0x%08x\n",
hw_state);
return;
}
} while (hw_state != HW_MACHINE_BOOT_DONE);
if (rev_id == 2)
W(RGF_PCIE_LOS_COUNTER_CTL, BIT(8));
C(RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
wmb(); /* order is important here */
wil_dbg_misc(wil, "Reset completed in %d ms\n", delay);
#undef R
#undef W
#undef S
#undef C
}
void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
{
le32_to_cpus(&r->base);
le16_to_cpus(&r->entry_size);
le16_to_cpus(&r->size);
le32_to_cpus(&r->tail);
le32_to_cpus(&r->head);
}
static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
{
ulong to = msecs_to_jiffies(1000);
ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
if (0 == left) {
wil_err(wil, "Firmware not ready\n");
return -ETIME;
} else {
wil_info(wil, "FW ready after %d ms. HW version 0x%08x\n",
jiffies_to_msecs(to-left), wil->hw_version);
}
return 0;
}
/*
* We reset all the structures, and we reset the UMAC.
* After calling this routine, you're expected to reload
* the firmware.
*/
int wil_reset(struct wil6210_priv *wil)
{
int rc;
WARN_ON(!mutex_is_locked(&wil->mutex));
cancel_work_sync(&wil->disconnect_worker);
wil6210_disconnect(wil, NULL);
wil->status = 0; /* prevent NAPI from being scheduled */
if (test_bit(wil_status_napi_en, &wil->status)) {
napi_synchronize(&wil->napi_rx);
}
if (wil->scan_request) {
wil_dbg_misc(wil, "Abort scan_request 0x%p\n",
wil->scan_request);
del_timer_sync(&wil->scan_timer);
cfg80211_scan_done(wil->scan_request, true);
wil->scan_request = NULL;
}
wil6210_disable_irq(wil);
wmi_event_flush(wil);
flush_workqueue(wil->wmi_wq_conn);
flush_workqueue(wil->wmi_wq);
/* TODO: put MAC in reset */
wil_target_reset(wil);
wil_rx_fini(wil);
/* init after reset */
wil->pending_connect_cid = -1;
reinit_completion(&wil->wmi_ready);
/* TODO: release MAC reset */
wil6210_enable_irq(wil);
/* we just started MAC, wait for FW ready */
rc = wil_wait_for_fw_ready(wil);
return rc;
}
void wil_fw_error_recovery(struct wil6210_priv *wil)
{
wil_dbg_misc(wil, "starting fw error recovery\n");
schedule_work(&wil->fw_error_worker);
}
void wil_link_on(struct wil6210_priv *wil)
{
struct net_device *ndev = wil_to_ndev(wil);
wil_dbg_misc(wil, "%s()\n", __func__);
netif_carrier_on(ndev);
netif_tx_wake_all_queues(ndev);
}
void wil_link_off(struct wil6210_priv *wil)
{
struct net_device *ndev = wil_to_ndev(wil);
wil_dbg_misc(wil, "%s()\n", __func__);
netif_tx_stop_all_queues(ndev);
netif_carrier_off(ndev);
}
static int __wil_up(struct wil6210_priv *wil)
{
struct net_device *ndev = wil_to_ndev(wil);
struct wireless_dev *wdev = wil->wdev;
int rc;
WARN_ON(!mutex_is_locked(&wil->mutex));
rc = wil_reset(wil);
if (rc)
return rc;
/* Rx VRING. After MAC and beacon */
rc = wil_rx_init(wil);
if (rc)
return rc;
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
wil_dbg_misc(wil, "type: STATION\n");
ndev->type = ARPHRD_ETHER;
break;
case NL80211_IFTYPE_AP:
wil_dbg_misc(wil, "type: AP\n");
ndev->type = ARPHRD_ETHER;
break;
case NL80211_IFTYPE_P2P_CLIENT:
wil_dbg_misc(wil, "type: P2P_CLIENT\n");
ndev->type = ARPHRD_ETHER;
break;
case NL80211_IFTYPE_P2P_GO:
wil_dbg_misc(wil, "type: P2P_GO\n");
ndev->type = ARPHRD_ETHER;
break;
case NL80211_IFTYPE_MONITOR:
wil_dbg_misc(wil, "type: Monitor\n");
ndev->type = ARPHRD_IEEE80211_RADIOTAP;
/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
break;
default:
return -EOPNOTSUPP;
}
/* MAC address - pre-requisite for other commands */
wmi_set_mac_address(wil, ndev->dev_addr);
napi_enable(&wil->napi_rx);
napi_enable(&wil->napi_tx);
set_bit(wil_status_napi_en, &wil->status);
return 0;
}
int wil_up(struct wil6210_priv *wil)
{
int rc;
mutex_lock(&wil->mutex);
rc = __wil_up(wil);
mutex_unlock(&wil->mutex);
return rc;
}
static int __wil_down(struct wil6210_priv *wil)
{
WARN_ON(!mutex_is_locked(&wil->mutex));
clear_bit(wil_status_napi_en, &wil->status);
napi_disable(&wil->napi_rx);
napi_disable(&wil->napi_tx);
if (wil->scan_request) {
del_timer_sync(&wil->scan_timer);
cfg80211_scan_done(wil->scan_request, true);
wil->scan_request = NULL;
}
wil6210_disconnect(wil, NULL);
wil_rx_fini(wil);
return 0;
}
int wil_down(struct wil6210_priv *wil)
{
int rc;
mutex_lock(&wil->mutex);
rc = __wil_down(wil);
mutex_unlock(&wil->mutex);
return rc;
}
int wil_find_cid(struct wil6210_priv *wil, const u8 *mac)
{
int i;
int rc = -ENOENT;
for (i = 0; i < ARRAY_SIZE(wil->sta); i++) {
if ((wil->sta[i].status != wil_sta_unused) &&
ether_addr_equal(wil->sta[i].addr, mac)) {
rc = i;
break;
}
}
return rc;
}