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pci.c
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/******************************************************************************
*
* Copyright(c) 2009-2012 Realtek Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* wlanfae <[email protected]>
* Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
* Hsinchu 300, Taiwan.
*
* Larry Finger <[email protected]>
*
*****************************************************************************/
#include "wifi.h"
#include "core.h"
#include "pci.h"
#include "base.h"
#include "ps.h"
#include "efuse.h"
#include <linux/interrupt.h>
#include <linux/export.h>
#include <linux/kmemleak.h>
#include <linux/module.h>
MODULE_AUTHOR("lizhaoming <[email protected]>");
MODULE_AUTHOR("Realtek WlanFAE <[email protected]>");
MODULE_AUTHOR("Larry Finger <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PCI basic driver for rtlwifi");
static const u16 pcibridge_vendors[PCI_BRIDGE_VENDOR_MAX] = {
INTEL_VENDOR_ID,
ATI_VENDOR_ID,
AMD_VENDOR_ID,
SIS_VENDOR_ID
};
static const u8 ac_to_hwq[] = {
VO_QUEUE,
VI_QUEUE,
BE_QUEUE,
BK_QUEUE
};
static u8 _rtl_mac_to_hwqueue(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
__le16 fc = rtl_get_fc(skb);
u8 queue_index = skb_get_queue_mapping(skb);
struct ieee80211_hdr *hdr;
if (unlikely(ieee80211_is_beacon(fc)))
return BEACON_QUEUE;
if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc))
return MGNT_QUEUE;
if (rtlhal->hw_type == HARDWARE_TYPE_RTL8192SE)
if (ieee80211_is_nullfunc(fc))
return HIGH_QUEUE;
if (rtlhal->hw_type == HARDWARE_TYPE_RTL8822BE) {
hdr = rtl_get_hdr(skb);
if (is_multicast_ether_addr(hdr->addr1) ||
is_broadcast_ether_addr(hdr->addr1))
return HIGH_QUEUE;
}
return ac_to_hwq[queue_index];
}
/* Update PCI dependent default settings*/
static void _rtl_pci_update_default_setting(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci_priv *pcipriv = rtl_pcipriv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
u8 pcibridge_vendor = pcipriv->ndis_adapter.pcibridge_vendor;
u8 init_aspm;
ppsc->reg_rfps_level = 0;
ppsc->support_aspm = false;
/*Update PCI ASPM setting */
ppsc->const_amdpci_aspm = rtlpci->const_amdpci_aspm;
switch (rtlpci->const_pci_aspm) {
case 0:
/*No ASPM */
break;
case 1:
/*ASPM dynamically enabled/disable. */
ppsc->reg_rfps_level |= RT_RF_LPS_LEVEL_ASPM;
break;
case 2:
/*ASPM with Clock Req dynamically enabled/disable. */
ppsc->reg_rfps_level |= (RT_RF_LPS_LEVEL_ASPM |
RT_RF_OFF_LEVL_CLK_REQ);
break;
case 3:
/*
* Always enable ASPM and Clock Req
* from initialization to halt.
* */
ppsc->reg_rfps_level &= ~(RT_RF_LPS_LEVEL_ASPM);
ppsc->reg_rfps_level |= (RT_RF_PS_LEVEL_ALWAYS_ASPM |
RT_RF_OFF_LEVL_CLK_REQ);
break;
case 4:
/*
* Always enable ASPM without Clock Req
* from initialization to halt.
* */
ppsc->reg_rfps_level &= ~(RT_RF_LPS_LEVEL_ASPM |
RT_RF_OFF_LEVL_CLK_REQ);
ppsc->reg_rfps_level |= RT_RF_PS_LEVEL_ALWAYS_ASPM;
break;
}
ppsc->reg_rfps_level |= RT_RF_OFF_LEVL_HALT_NIC;
/*Update Radio OFF setting */
switch (rtlpci->const_hwsw_rfoff_d3) {
case 1:
if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM)
ppsc->reg_rfps_level |= RT_RF_OFF_LEVL_ASPM;
break;
case 2:
if (ppsc->reg_rfps_level & RT_RF_LPS_LEVEL_ASPM)
ppsc->reg_rfps_level |= RT_RF_OFF_LEVL_ASPM;
ppsc->reg_rfps_level |= RT_RF_OFF_LEVL_HALT_NIC;
break;
case 3:
ppsc->reg_rfps_level |= RT_RF_OFF_LEVL_PCI_D3;
break;
}
/*Set HW definition to determine if it supports ASPM. */
switch (rtlpci->const_support_pciaspm) {
case 0:{
/*Not support ASPM. */
bool support_aspm = false;
ppsc->support_aspm = support_aspm;
break;
}
case 1:{
/*Support ASPM. */
bool support_aspm = true;
bool support_backdoor = true;
ppsc->support_aspm = support_aspm;
/*if (priv->oem_id == RT_CID_TOSHIBA &&
!priv->ndis_adapter.amd_l1_patch)
support_backdoor = false; */
ppsc->support_backdoor = support_backdoor;
break;
}
case 2:
/*ASPM value set by chipset. */
if (pcibridge_vendor == PCI_BRIDGE_VENDOR_INTEL) {
bool support_aspm = true;
ppsc->support_aspm = support_aspm;
}
break;
default:
pr_err("switch case %#x not processed\n",
rtlpci->const_support_pciaspm);
break;
}
/* toshiba aspm issue, toshiba will set aspm selfly
* so we should not set aspm in driver */
pci_read_config_byte(rtlpci->pdev, 0x80, &init_aspm);
if (rtlpriv->rtlhal.hw_type == HARDWARE_TYPE_RTL8192SE &&
init_aspm == 0x43)
ppsc->support_aspm = false;
}
static bool _rtl_pci_platform_switch_device_pci_aspm(
struct ieee80211_hw *hw,
u8 value)
{
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
if (rtlhal->hw_type != HARDWARE_TYPE_RTL8192SE)
value |= 0x40;
pci_write_config_byte(rtlpci->pdev, 0x80, value);
return false;
}
/*When we set 0x01 to enable clk request. Set 0x0 to disable clk req.*/
static void _rtl_pci_switch_clk_req(struct ieee80211_hw *hw, u8 value)
{
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
pci_write_config_byte(rtlpci->pdev, 0x81, value);
if (rtlhal->hw_type == HARDWARE_TYPE_RTL8192SE)
udelay(100);
}
/*Disable RTL8192SE ASPM & Disable Pci Bridge ASPM*/
static void rtl_pci_disable_aspm(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci_priv *pcipriv = rtl_pcipriv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
u8 pcibridge_vendor = pcipriv->ndis_adapter.pcibridge_vendor;
u8 num4bytes = pcipriv->ndis_adapter.num4bytes;
/*Retrieve original configuration settings. */
u8 linkctrl_reg = pcipriv->ndis_adapter.linkctrl_reg;
u16 pcibridge_linkctrlreg = pcipriv->ndis_adapter.
pcibridge_linkctrlreg;
u16 aspmlevel = 0;
u8 tmp_u1b = 0;
if (!ppsc->support_aspm)
return;
if (pcibridge_vendor == PCI_BRIDGE_VENDOR_UNKNOWN) {
RT_TRACE(rtlpriv, COMP_POWER, DBG_TRACE,
"PCI(Bridge) UNKNOWN\n");
return;
}
if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_CLK_REQ) {
RT_CLEAR_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_CLK_REQ);
_rtl_pci_switch_clk_req(hw, 0x0);
}
/*for promising device will in L0 state after an I/O. */
pci_read_config_byte(rtlpci->pdev, 0x80, &tmp_u1b);
/*Set corresponding value. */
aspmlevel |= BIT(0) | BIT(1);
linkctrl_reg &= ~aspmlevel;
pcibridge_linkctrlreg &= ~(BIT(0) | BIT(1));
_rtl_pci_platform_switch_device_pci_aspm(hw, linkctrl_reg);
udelay(50);
/*4 Disable Pci Bridge ASPM */
pci_write_config_byte(rtlpci->pdev, (num4bytes << 2),
pcibridge_linkctrlreg);
udelay(50);
}
/*
*Enable RTL8192SE ASPM & Enable Pci Bridge ASPM for
*power saving We should follow the sequence to enable
*RTL8192SE first then enable Pci Bridge ASPM
*or the system will show bluescreen.
*/
static void rtl_pci_enable_aspm(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci_priv *pcipriv = rtl_pcipriv(hw);
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
u8 pcibridge_vendor = pcipriv->ndis_adapter.pcibridge_vendor;
u8 num4bytes = pcipriv->ndis_adapter.num4bytes;
u16 aspmlevel;
u8 u_pcibridge_aspmsetting;
u8 u_device_aspmsetting;
if (!ppsc->support_aspm)
return;
if (pcibridge_vendor == PCI_BRIDGE_VENDOR_UNKNOWN) {
RT_TRACE(rtlpriv, COMP_POWER, DBG_TRACE,
"PCI(Bridge) UNKNOWN\n");
return;
}
/*4 Enable Pci Bridge ASPM */
u_pcibridge_aspmsetting =
pcipriv->ndis_adapter.pcibridge_linkctrlreg |
rtlpci->const_hostpci_aspm_setting;
if (pcibridge_vendor == PCI_BRIDGE_VENDOR_INTEL)
u_pcibridge_aspmsetting &= ~BIT(0);
pci_write_config_byte(rtlpci->pdev, (num4bytes << 2),
u_pcibridge_aspmsetting);
RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
"PlatformEnableASPM(): Write reg[%x] = %x\n",
(pcipriv->ndis_adapter.pcibridge_pciehdr_offset + 0x10),
u_pcibridge_aspmsetting);
udelay(50);
/*Get ASPM level (with/without Clock Req) */
aspmlevel = rtlpci->const_devicepci_aspm_setting;
u_device_aspmsetting = pcipriv->ndis_adapter.linkctrl_reg;
/*_rtl_pci_platform_switch_device_pci_aspm(dev,*/
/*(priv->ndis_adapter.linkctrl_reg | ASPMLevel)); */
u_device_aspmsetting |= aspmlevel;
_rtl_pci_platform_switch_device_pci_aspm(hw, u_device_aspmsetting);
if (ppsc->reg_rfps_level & RT_RF_OFF_LEVL_CLK_REQ) {
_rtl_pci_switch_clk_req(hw, (ppsc->reg_rfps_level &
RT_RF_OFF_LEVL_CLK_REQ) ? 1 : 0);
RT_SET_PS_LEVEL(ppsc, RT_RF_OFF_LEVL_CLK_REQ);
}
udelay(100);
}
static bool rtl_pci_get_amd_l1_patch(struct ieee80211_hw *hw)
{
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
bool status = false;
u8 offset_e0;
unsigned offset_e4;
pci_write_config_byte(rtlpci->pdev, 0xe0, 0xa0);
pci_read_config_byte(rtlpci->pdev, 0xe0, &offset_e0);
if (offset_e0 == 0xA0) {
pci_read_config_dword(rtlpci->pdev, 0xe4, &offset_e4);
if (offset_e4 & BIT(23))
status = true;
}
return status;
}
static bool rtl_pci_check_buddy_priv(struct ieee80211_hw *hw,
struct rtl_priv **buddy_priv)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci_priv *pcipriv = rtl_pcipriv(hw);
bool find_buddy_priv = false;
struct rtl_priv *tpriv;
struct rtl_pci_priv *tpcipriv = NULL;
if (!list_empty(&rtlpriv->glb_var->glb_priv_list)) {
list_for_each_entry(tpriv, &rtlpriv->glb_var->glb_priv_list,
list) {
tpcipriv = (struct rtl_pci_priv *)tpriv->priv;
RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
"pcipriv->ndis_adapter.funcnumber %x\n",
pcipriv->ndis_adapter.funcnumber);
RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
"tpcipriv->ndis_adapter.funcnumber %x\n",
tpcipriv->ndis_adapter.funcnumber);
if ((pcipriv->ndis_adapter.busnumber ==
tpcipriv->ndis_adapter.busnumber) &&
(pcipriv->ndis_adapter.devnumber ==
tpcipriv->ndis_adapter.devnumber) &&
(pcipriv->ndis_adapter.funcnumber !=
tpcipriv->ndis_adapter.funcnumber)) {
find_buddy_priv = true;
break;
}
}
}
RT_TRACE(rtlpriv, COMP_INIT, DBG_LOUD,
"find_buddy_priv %d\n", find_buddy_priv);
if (find_buddy_priv)
*buddy_priv = tpriv;
return find_buddy_priv;
}
static void rtl_pci_get_linkcontrol_field(struct ieee80211_hw *hw)
{
struct rtl_pci_priv *pcipriv = rtl_pcipriv(hw);
struct rtl_pci *rtlpci = rtl_pcidev(pcipriv);
u8 capabilityoffset = pcipriv->ndis_adapter.pcibridge_pciehdr_offset;
u8 linkctrl_reg;
u8 num4bbytes;
num4bbytes = (capabilityoffset + 0x10) / 4;
/*Read Link Control Register */
pci_read_config_byte(rtlpci->pdev, (num4bbytes << 2), &linkctrl_reg);
pcipriv->ndis_adapter.pcibridge_linkctrlreg = linkctrl_reg;
}
static void rtl_pci_parse_configuration(struct pci_dev *pdev,
struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci_priv *pcipriv = rtl_pcipriv(hw);
u8 tmp;
u16 linkctrl_reg;
/*Link Control Register */
pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &linkctrl_reg);
pcipriv->ndis_adapter.linkctrl_reg = (u8)linkctrl_reg;
RT_TRACE(rtlpriv, COMP_INIT, DBG_TRACE, "Link Control Register =%x\n",
pcipriv->ndis_adapter.linkctrl_reg);
pci_read_config_byte(pdev, 0x98, &tmp);
tmp |= BIT(4);
pci_write_config_byte(pdev, 0x98, tmp);
tmp = 0x17;
pci_write_config_byte(pdev, 0x70f, tmp);
}
static void rtl_pci_init_aspm(struct ieee80211_hw *hw)
{
struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
_rtl_pci_update_default_setting(hw);
if (ppsc->reg_rfps_level & RT_RF_PS_LEVEL_ALWAYS_ASPM) {
/*Always enable ASPM & Clock Req. */
rtl_pci_enable_aspm(hw);
RT_SET_PS_LEVEL(ppsc, RT_RF_PS_LEVEL_ALWAYS_ASPM);
}
}
static void _rtl_pci_io_handler_init(struct device *dev,
struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
rtlpriv->io.dev = dev;
rtlpriv->io.write8_async = pci_write8_async;
rtlpriv->io.write16_async = pci_write16_async;
rtlpriv->io.write32_async = pci_write32_async;
rtlpriv->io.read8_sync = pci_read8_sync;
rtlpriv->io.read16_sync = pci_read16_sync;
rtlpriv->io.read32_sync = pci_read32_sync;
}
static bool _rtl_update_earlymode_info(struct ieee80211_hw *hw,
struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc, u8 tid)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
struct sk_buff *next_skb;
u8 additionlen = FCS_LEN;
/* here open is 4, wep/tkip is 8, aes is 12*/
if (info->control.hw_key)
additionlen += info->control.hw_key->icv_len;
/* The most skb num is 6 */
tcb_desc->empkt_num = 0;
spin_lock_bh(&rtlpriv->locks.waitq_lock);
skb_queue_walk(&rtlpriv->mac80211.skb_waitq[tid], next_skb) {
struct ieee80211_tx_info *next_info;
next_info = IEEE80211_SKB_CB(next_skb);
if (next_info->flags & IEEE80211_TX_CTL_AMPDU) {
tcb_desc->empkt_len[tcb_desc->empkt_num] =
next_skb->len + additionlen;
tcb_desc->empkt_num++;
} else {
break;
}
if (skb_queue_is_last(&rtlpriv->mac80211.skb_waitq[tid],
next_skb))
break;
if (tcb_desc->empkt_num >= rtlhal->max_earlymode_num)
break;
}
spin_unlock_bh(&rtlpriv->locks.waitq_lock);
return true;
}
/* just for early mode now */
static void _rtl_pci_tx_chk_waitq(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
struct sk_buff *skb = NULL;
struct ieee80211_tx_info *info = NULL;
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
int tid;
if (!rtlpriv->rtlhal.earlymode_enable)
return;
if (rtlpriv->dm.supp_phymode_switch &&
(rtlpriv->easy_concurrent_ctl.switch_in_process ||
(rtlpriv->buddy_priv &&
rtlpriv->buddy_priv->easy_concurrent_ctl.switch_in_process)))
return;
/* we juse use em for BE/BK/VI/VO */
for (tid = 7; tid >= 0; tid--) {
u8 hw_queue = ac_to_hwq[rtl_tid_to_ac(tid)];
struct rtl8192_tx_ring *ring = &rtlpci->tx_ring[hw_queue];
while (!mac->act_scanning &&
rtlpriv->psc.rfpwr_state == ERFON) {
struct rtl_tcb_desc tcb_desc;
memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
spin_lock_bh(&rtlpriv->locks.waitq_lock);
if (!skb_queue_empty(&mac->skb_waitq[tid]) &&
(ring->entries - skb_queue_len(&ring->queue) >
rtlhal->max_earlymode_num)) {
skb = skb_dequeue(&mac->skb_waitq[tid]);
} else {
spin_unlock_bh(&rtlpriv->locks.waitq_lock);
break;
}
spin_unlock_bh(&rtlpriv->locks.waitq_lock);
/* Some macaddr can't do early mode. like
* multicast/broadcast/no_qos data */
info = IEEE80211_SKB_CB(skb);
if (info->flags & IEEE80211_TX_CTL_AMPDU)
_rtl_update_earlymode_info(hw, skb,
&tcb_desc, tid);
rtlpriv->intf_ops->adapter_tx(hw, NULL, skb, &tcb_desc);
}
}
}
static void _rtl_pci_tx_isr(struct ieee80211_hw *hw, int prio)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
struct rtl8192_tx_ring *ring = &rtlpci->tx_ring[prio];
while (skb_queue_len(&ring->queue)) {
struct sk_buff *skb;
struct ieee80211_tx_info *info;
__le16 fc;
u8 tid;
u8 *entry;
dma_addr_t dma_addr;
if (rtlpriv->use_new_trx_flow)
entry = (u8 *)(&ring->buffer_desc[ring->idx]);
else
entry = (u8 *)(&ring->desc[ring->idx]);
if (rtlpriv->cfg->ops->get_available_desc &&
rtlpriv->cfg->ops->get_available_desc(hw, prio) <= 1) {
RT_TRACE(rtlpriv, (COMP_INTR | COMP_SEND), DBG_DMESG,
"no available desc!\n");
return;
}
if (!rtlpriv->cfg->ops->is_tx_desc_closed(hw, prio, ring->idx))
return;
ring->idx = (ring->idx + 1) % ring->entries;
skb = __skb_dequeue(&ring->queue);
dma_addr = rtlpriv->cfg->ops->get_desc((u8 *)entry, true,
HW_DESC_TXBUFF_ADDR);
#if (DMA_IS_64BIT == 1)
dma_addr |= (u64)rtlpriv->cfg->ops->get_desc((u8 *)entry, true,
HW_DESC_TXBUFF_ADDR_HI) << 32;
#endif
pci_unmap_single(rtlpci->pdev, dma_addr,
skb->len, PCI_DMA_TODEVICE);
/* remove early mode header */
if (rtlpriv->rtlhal.earlymode_enable)
skb_pull(skb, EM_HDR_LEN);
RT_TRACE(rtlpriv, (COMP_INTR | COMP_SEND), DBG_TRACE,
"new ring->idx:%d, free: skb_queue_len:%d, free: seq:%x\n",
ring->idx,
skb_queue_len(&ring->queue),
*(u16 *)(skb->data + 22));
if (prio == TXCMD_QUEUE) {
dev_kfree_skb(skb);
goto tx_status_ok;
}
/* for sw LPS, just after NULL skb send out, we can
* sure AP knows we are sleeping, we should not let
* rf sleep
*/
fc = rtl_get_fc(skb);
if (ieee80211_is_nullfunc(fc)) {
if (ieee80211_has_pm(fc)) {
rtlpriv->mac80211.offchan_delay = true;
rtlpriv->psc.state_inap = true;
} else {
rtlpriv->psc.state_inap = false;
}
}
if (ieee80211_is_action(fc)) {
struct ieee80211_mgmt *action_frame =
(struct ieee80211_mgmt *)skb->data;
if (action_frame->u.action.u.ht_smps.action ==
WLAN_HT_ACTION_SMPS) {
dev_kfree_skb(skb);
goto tx_status_ok;
}
}
/* update tid tx pkt num */
tid = rtl_get_tid(skb);
if (tid <= 7)
rtlpriv->link_info.tidtx_inperiod[tid]++;
info = IEEE80211_SKB_CB(skb);
ieee80211_tx_info_clear_status(info);
info->flags |= IEEE80211_TX_STAT_ACK;
/*info->status.rates[0].count = 1; */
ieee80211_tx_status_irqsafe(hw, skb);
if ((ring->entries - skb_queue_len(&ring->queue)) <= 4) {
RT_TRACE(rtlpriv, COMP_ERR, DBG_DMESG,
"more desc left, wake skb_queue@%d, ring->idx = %d, skb_queue_len = 0x%x\n",
prio, ring->idx,
skb_queue_len(&ring->queue));
ieee80211_wake_queue(hw,
skb_get_queue_mapping
(skb));
}
tx_status_ok:
skb = NULL;
}
if (((rtlpriv->link_info.num_rx_inperiod +
rtlpriv->link_info.num_tx_inperiod) > 8) ||
(rtlpriv->link_info.num_rx_inperiod > 2))
rtl_lps_leave(hw);
}
static int _rtl_pci_init_one_rxdesc(struct ieee80211_hw *hw,
struct sk_buff *new_skb, u8 *entry,
int rxring_idx, int desc_idx)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
u32 bufferaddress;
u8 tmp_one = 1;
struct sk_buff *skb;
if (likely(new_skb)) {
skb = new_skb;
goto remap;
}
skb = dev_alloc_skb(rtlpci->rxbuffersize);
if (!skb)
return 0;
remap:
/* just set skb->cb to mapping addr for pci_unmap_single use */
*((dma_addr_t *)skb->cb) =
pci_map_single(rtlpci->pdev, skb_tail_pointer(skb),
rtlpci->rxbuffersize, PCI_DMA_FROMDEVICE);
bufferaddress = *((dma_addr_t *)skb->cb);
if (pci_dma_mapping_error(rtlpci->pdev, bufferaddress))
return 0;
rtlpci->rx_ring[rxring_idx].rx_buf[desc_idx] = skb;
if (rtlpriv->use_new_trx_flow) {
/* skb->cb may be 64 bit address */
rtlpriv->cfg->ops->set_desc(hw, (u8 *)entry, false,
HW_DESC_RX_PREPARE,
(u8 *)(dma_addr_t *)skb->cb);
} else {
rtlpriv->cfg->ops->set_desc(hw, (u8 *)entry, false,
HW_DESC_RXBUFF_ADDR,
(u8 *)&bufferaddress);
rtlpriv->cfg->ops->set_desc(hw, (u8 *)entry, false,
HW_DESC_RXPKT_LEN,
(u8 *)&rtlpci->rxbuffersize);
rtlpriv->cfg->ops->set_desc(hw, (u8 *)entry, false,
HW_DESC_RXOWN,
(u8 *)&tmp_one);
}
return 1;
}
/* inorder to receive 8K AMSDU we have set skb to
* 9100bytes in init rx ring, but if this packet is
* not a AMSDU, this large packet will be sent to
* TCP/IP directly, this cause big packet ping fail
* like: "ping -s 65507", so here we will realloc skb
* based on the true size of packet, Mac80211
* Probably will do it better, but does not yet.
*
* Some platform will fail when alloc skb sometimes.
* in this condition, we will send the old skb to
* mac80211 directly, this will not cause any other
* issues, but only this packet will be lost by TCP/IP
*/
static void _rtl_pci_rx_to_mac80211(struct ieee80211_hw *hw,
struct sk_buff *skb,
struct ieee80211_rx_status rx_status)
{
if (unlikely(!rtl_action_proc(hw, skb, false))) {
dev_kfree_skb_any(skb);
} else {
struct sk_buff *uskb = NULL;
u8 *pdata;
uskb = dev_alloc_skb(skb->len + 128);
if (likely(uskb)) {
memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status,
sizeof(rx_status));
pdata = (u8 *)skb_put(uskb, skb->len);
memcpy(pdata, skb->data, skb->len);
dev_kfree_skb_any(skb);
ieee80211_rx_irqsafe(hw, uskb);
} else {
ieee80211_rx_irqsafe(hw, skb);
}
}
}
/*hsisr interrupt handler*/
static void _rtl_pci_hs_interrupt(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
rtl_write_byte(rtlpriv, rtlpriv->cfg->maps[MAC_HSISR],
rtl_read_byte(rtlpriv, rtlpriv->cfg->maps[MAC_HSISR]) |
rtlpci->sys_irq_mask);
}
static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
int rxring_idx = RTL_PCI_RX_MPDU_QUEUE;
struct ieee80211_rx_status rx_status = { 0 };
unsigned int count = rtlpci->rxringcount;
u8 own;
u8 tmp_one;
bool unicast = false;
u8 hw_queue = 0;
unsigned int rx_remained_cnt;
struct rtl_stats stats = {
.signal = 0,
.rate = 0,
};
/*RX NORMAL PKT */
while (count--) {
struct ieee80211_hdr *hdr;
__le16 fc;
u16 len;
/*rx buffer descriptor */
struct rtl_rx_buffer_desc *buffer_desc = NULL;
/*if use new trx flow, it means wifi info */
struct rtl_rx_desc *pdesc = NULL;
/*rx pkt */
struct sk_buff *skb = rtlpci->rx_ring[rxring_idx].rx_buf[
rtlpci->rx_ring[rxring_idx].idx];
struct sk_buff *new_skb;
if (rtlpriv->use_new_trx_flow) {
rx_remained_cnt =
rtlpriv->cfg->ops->rx_desc_buff_remained_cnt(hw,
hw_queue);
if (rx_remained_cnt == 0)
return;
buffer_desc = &rtlpci->rx_ring[rxring_idx].buffer_desc[
rtlpci->rx_ring[rxring_idx].idx];
pdesc = (struct rtl_rx_desc *)skb->data;
} else { /* rx descriptor */
pdesc = &rtlpci->rx_ring[rxring_idx].desc[
rtlpci->rx_ring[rxring_idx].idx];
own = (u8)rtlpriv->cfg->ops->get_desc((u8 *)pdesc,
false,
HW_DESC_OWN);
if (own) /* wait data to be filled by hardware */
return;
}
/* Reaching this point means: data is filled already
* AAAAAAttention !!!
* We can NOT access 'skb' before 'pci_unmap_single'
*/
pci_unmap_single(rtlpci->pdev, *((dma_addr_t *)skb->cb),
rtlpci->rxbuffersize, PCI_DMA_FROMDEVICE);
/* get a new skb - if fail, old one will be reused */
new_skb = dev_alloc_skb(rtlpci->rxbuffersize);
if (unlikely(!new_skb))
goto no_new;
memset(&rx_status , 0 , sizeof(rx_status));
rtlpriv->cfg->ops->query_rx_desc(hw, &stats,
&rx_status, (u8 *)pdesc, skb);
if (rtlpriv->use_new_trx_flow)
rtlpriv->cfg->ops->rx_check_dma_ok(hw,
(u8 *)buffer_desc,
hw_queue);
len = rtlpriv->cfg->ops->get_desc((u8 *)pdesc, false,
HW_DESC_RXPKT_LEN);
if (skb->end - skb->tail > len) {
skb_put(skb, len);
if (rtlpriv->use_new_trx_flow)
skb_reserve(skb, stats.rx_drvinfo_size +
stats.rx_bufshift + 24);
else
skb_reserve(skb, stats.rx_drvinfo_size +
stats.rx_bufshift);
} else {
RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
"skb->end - skb->tail = %d, len is %d\n",
skb->end - skb->tail, len);
dev_kfree_skb_any(skb);
goto new_trx_end;
}
/* handle command packet here */
if (rtlpriv->cfg->ops->rx_command_packet &&
rtlpriv->cfg->ops->rx_command_packet(hw, &stats, skb)) {
dev_kfree_skb_any(skb);
goto new_trx_end;
}
/*
* NOTICE This can not be use for mac80211,
* this is done in mac80211 code,
* if done here sec DHCP will fail
* skb_trim(skb, skb->len - 4);
*/
hdr = rtl_get_hdr(skb);
fc = rtl_get_fc(skb);
if (!stats.crc && !stats.hwerror) {
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status,
sizeof(rx_status));
if (is_broadcast_ether_addr(hdr->addr1)) {
;/*TODO*/
} else if (is_multicast_ether_addr(hdr->addr1)) {
;/*TODO*/
} else {
unicast = true;
rtlpriv->stats.rxbytesunicast += skb->len;
}
rtl_is_special_data(hw, skb, false, true);
if (ieee80211_is_data(fc)) {
rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
if (unicast)
rtlpriv->link_info.num_rx_inperiod++;
}
/* static bcn for roaming */
rtl_beacon_statistic(hw, skb);
rtl_p2p_info(hw, (void *)skb->data, skb->len);
/* for sw lps */
rtl_swlps_beacon(hw, (void *)skb->data, skb->len);
rtl_recognize_peer(hw, (void *)skb->data, skb->len);
if ((rtlpriv->mac80211.opmode == NL80211_IFTYPE_AP) &&
(rtlpriv->rtlhal.current_bandtype ==
BAND_ON_2_4G) &&
(ieee80211_is_beacon(fc) ||
ieee80211_is_probe_resp(fc))) {
dev_kfree_skb_any(skb);
} else {
rtl_check_beacon_key(hw, (void *)skb->data,
skb->len);
_rtl_pci_rx_to_mac80211(hw, skb, rx_status);
}
} else {
dev_kfree_skb_any(skb);
}
new_trx_end:
if (rtlpriv->use_new_trx_flow) {
rtlpci->rx_ring[hw_queue].next_rx_rp += 1;
rtlpci->rx_ring[hw_queue].next_rx_rp %=
RTL_PCI_MAX_RX_COUNT;
rx_remained_cnt--;
rtl_write_word(rtlpriv, 0x3B4,
rtlpci->rx_ring[hw_queue].next_rx_rp);
}
if (((rtlpriv->link_info.num_rx_inperiod +
rtlpriv->link_info.num_tx_inperiod) > 8) ||
(rtlpriv->link_info.num_rx_inperiod > 2))
rtl_lps_leave(hw);
skb = new_skb;
no_new:
if (rtlpriv->use_new_trx_flow) {
_rtl_pci_init_one_rxdesc(hw, skb, (u8 *)buffer_desc,
rxring_idx,
rtlpci->rx_ring[rxring_idx].idx);
} else {
_rtl_pci_init_one_rxdesc(hw, skb, (u8 *)pdesc,
rxring_idx,
rtlpci->rx_ring[rxring_idx].idx);
if (rtlpci->rx_ring[rxring_idx].idx ==
rtlpci->rxringcount - 1)
rtlpriv->cfg->ops->set_desc(hw, (u8 *)pdesc,
false,
HW_DESC_RXERO,
(u8 *)&tmp_one);
}
rtlpci->rx_ring[rxring_idx].idx =
(rtlpci->rx_ring[rxring_idx].idx + 1) %
rtlpci->rxringcount;
}
}
static irqreturn_t _rtl_pci_interrupt(int irq, void *dev_id)
{
struct ieee80211_hw *hw = dev_id;
struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
unsigned long flags;
u32 inta = 0;
u32 intb = 0;
u32 intc = 0;
u32 intd = 0;
irqreturn_t ret = IRQ_HANDLED;
if (rtlpci->irq_enabled == 0)
return ret;
spin_lock_irqsave(&rtlpriv->locks.irq_th_lock , flags);
rtlpriv->cfg->ops->disable_interrupt(hw);
/*read ISR: 4/8bytes */
rtlpriv->cfg->ops->interrupt_recognized(hw, &inta, &intb, &intc, &intd);
/*Shared IRQ or HW disappared */
if (!inta || inta == 0xffff)
goto done;
/*<1> beacon related */
if (inta & rtlpriv->cfg->maps[RTL_IMR_TBDOK]) {
RT_TRACE(rtlpriv, COMP_INTR, DBG_TRACE,
"beacon ok interrupt!\n");
}
if (unlikely(inta & rtlpriv->cfg->maps[RTL_IMR_TBDER])) {
RT_TRACE(rtlpriv, COMP_INTR, DBG_TRACE,
"beacon err interrupt!\n");
}
if (inta & rtlpriv->cfg->maps[RTL_IMR_BDOK]) {
RT_TRACE(rtlpriv, COMP_INTR, DBG_TRACE, "beacon interrupt!\n");
}
if (inta & rtlpriv->cfg->maps[RTL_IMR_BCNINT]) {
RT_TRACE(rtlpriv, COMP_INTR, DBG_TRACE,
"prepare beacon for interrupt!\n");
tasklet_schedule(&rtlpriv->works.irq_prepare_bcn_tasklet);
}