diff options
Diffstat (limited to 'drivers/net/wireless/ath/wil6210/main.c')
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/main.c | 591 |
1 files changed, 591 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c new file mode 100644 index 00000000000..11e6d9d22ea --- /dev/null +++ b/drivers/net/wireless/ath/wil6210/main.c @@ -0,0 +1,591 @@ +/* + * 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; +} |