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linux-stable/drivers/net/wireless/mwl8k.c
Lennert Buytenhek 76266b2ad3 mwl8k: dma header manipulations can't fail 
Adding and removing the DMA header that the mwl8k hardware requires
on tx and provides on rx can never fail, since we are guaranteed to
have enough headroom on the tx path to expand the packet, and we only
ever shrink the packet on the rx path.  (And on both paths we are
guaranteed to be the only user of the skb we are handling.)

This allows removing all of the skb clone handling in the tx and tx
reclaim paths, and eliminates error checks in both the tx and rx
paths, simplifying the code a bit more.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-08-20 11:38:06 -04:00

3605 lines
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/*
* drivers/net/wireless/mwl8k.c
* Driver for Marvell TOPDOG 802.11 Wireless cards
*
* Copyright (C) 2008 Marvell Semiconductor Inc.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/completion.h>
#include <linux/etherdevice.h>
#include <net/mac80211.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <linux/workqueue.h>
#define MWL8K_DESC "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
#define MWL8K_NAME KBUILD_MODNAME
#define MWL8K_VERSION "0.9.1"
MODULE_DESCRIPTION(MWL8K_DESC);
MODULE_VERSION(MWL8K_VERSION);
MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
MODULE_LICENSE("GPL");
static DEFINE_PCI_DEVICE_TABLE(mwl8k_table) = {
{ PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = 8687, },
{ PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = 8687, },
{ }
};
MODULE_DEVICE_TABLE(pci, mwl8k_table);
/* Register definitions */
#define MWL8K_HIU_GEN_PTR 0x00000c10
#define MWL8K_MODE_STA 0x0000005a
#define MWL8K_MODE_AP 0x000000a5
#define MWL8K_HIU_INT_CODE 0x00000c14
#define MWL8K_FWSTA_READY 0xf0f1f2f4
#define MWL8K_FWAP_READY 0xf1f2f4a5
#define MWL8K_INT_CODE_CMD_FINISHED 0x00000005
#define MWL8K_HIU_SCRATCH 0x00000c40
/* Host->device communications */
#define MWL8K_HIU_H2A_INTERRUPT_EVENTS 0x00000c18
#define MWL8K_HIU_H2A_INTERRUPT_STATUS 0x00000c1c
#define MWL8K_HIU_H2A_INTERRUPT_MASK 0x00000c20
#define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL 0x00000c24
#define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK 0x00000c28
#define MWL8K_H2A_INT_DUMMY (1 << 20)
#define MWL8K_H2A_INT_RESET (1 << 15)
#define MWL8K_H2A_INT_DOORBELL (1 << 1)
#define MWL8K_H2A_INT_PPA_READY (1 << 0)
/* Device->host communications */
#define MWL8K_HIU_A2H_INTERRUPT_EVENTS 0x00000c2c
#define MWL8K_HIU_A2H_INTERRUPT_STATUS 0x00000c30
#define MWL8K_HIU_A2H_INTERRUPT_MASK 0x00000c34
#define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL 0x00000c38
#define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK 0x00000c3c
#define MWL8K_A2H_INT_DUMMY (1 << 20)
#define MWL8K_A2H_INT_CHNL_SWITCHED (1 << 11)
#define MWL8K_A2H_INT_QUEUE_EMPTY (1 << 10)
#define MWL8K_A2H_INT_RADAR_DETECT (1 << 7)
#define MWL8K_A2H_INT_RADIO_ON (1 << 6)
#define MWL8K_A2H_INT_RADIO_OFF (1 << 5)
#define MWL8K_A2H_INT_MAC_EVENT (1 << 3)
#define MWL8K_A2H_INT_OPC_DONE (1 << 2)
#define MWL8K_A2H_INT_RX_READY (1 << 1)
#define MWL8K_A2H_INT_TX_DONE (1 << 0)
#define MWL8K_A2H_EVENTS (MWL8K_A2H_INT_DUMMY | \
MWL8K_A2H_INT_CHNL_SWITCHED | \
MWL8K_A2H_INT_QUEUE_EMPTY | \
MWL8K_A2H_INT_RADAR_DETECT | \
MWL8K_A2H_INT_RADIO_ON | \
MWL8K_A2H_INT_RADIO_OFF | \
MWL8K_A2H_INT_MAC_EVENT | \
MWL8K_A2H_INT_OPC_DONE | \
MWL8K_A2H_INT_RX_READY | \
MWL8K_A2H_INT_TX_DONE)
/* WME stream classes */
#define WME_AC_BE 0 /* best effort */
#define WME_AC_BK 1 /* background */
#define WME_AC_VI 2 /* video */
#define WME_AC_VO 3 /* voice */
#define MWL8K_RX_QUEUES 1
#define MWL8K_TX_QUEUES 4
struct mwl8k_rx_queue {
int rx_desc_count;
/* hw receives here */
int rx_head;
/* refill descs here */
int rx_tail;
struct mwl8k_rx_desc *rx_desc_area;
dma_addr_t rx_desc_dma;
struct sk_buff **rx_skb;
};
struct mwl8k_tx_queue {
/* hw transmits here */
int tx_head;
/* sw appends here */
int tx_tail;
struct ieee80211_tx_queue_stats tx_stats;
struct mwl8k_tx_desc *tx_desc_area;
dma_addr_t tx_desc_dma;
struct sk_buff **tx_skb;
};
/* Pointers to the firmware data and meta information about it. */
struct mwl8k_firmware {
/* Microcode */
struct firmware *ucode;
/* Boot helper code */
struct firmware *helper;
};
struct mwl8k_priv {
void __iomem *regs;
struct ieee80211_hw *hw;
struct pci_dev *pdev;
u8 name[16];
/* firmware access lock */
spinlock_t fw_lock;
/* firmware files and meta data */
struct mwl8k_firmware fw;
u32 part_num;
/* lock held over TX and TX reap */
spinlock_t tx_lock;
struct ieee80211_vif *vif;
struct ieee80211_channel *current_channel;
/* power management status cookie from firmware */
u32 *cookie;
dma_addr_t cookie_dma;
u16 num_mcaddrs;
u8 hw_rev;
__le32 fw_rev;
/*
* Running count of TX packets in flight, to avoid
* iterating over the transmit rings each time.
*/
int pending_tx_pkts;
struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
struct mwl8k_tx_queue txq[MWL8K_TX_QUEUES];
/* PHY parameters */
struct ieee80211_supported_band band;
struct ieee80211_channel channels[14];
struct ieee80211_rate rates[12];
bool radio_on;
bool radio_short_preamble;
bool wmm_enabled;
/* Set if PHY config is in progress */
bool inconfig;
/* XXX need to convert this to handle multiple interfaces */
bool capture_beacon;
u8 capture_bssid[ETH_ALEN];
struct sk_buff *beacon_skb;
/*
* This FJ worker has to be global as it is scheduled from the
* RX handler. At this point we don't know which interface it
* belongs to until the list of bssids waiting to complete join
* is checked.
*/
struct work_struct finalize_join_worker;
/* Tasklet to reclaim TX descriptors and buffers after tx */
struct tasklet_struct tx_reclaim_task;
/* Work thread to serialize configuration requests */
struct workqueue_struct *config_wq;
struct completion *hostcmd_wait;
struct completion *tx_wait;
};
/* Per interface specific private data */
struct mwl8k_vif {
/* backpointer to parent config block */
struct mwl8k_priv *priv;
/* BSS config of AP or IBSS from mac80211*/
struct ieee80211_bss_conf bss_info;
/* BSSID of AP or IBSS */
u8 bssid[ETH_ALEN];
u8 mac_addr[ETH_ALEN];
/*
* Subset of supported legacy rates.
* Intersection of AP and STA supported rates.
*/
struct ieee80211_rate legacy_rates[12];
/* number of supported legacy rates */
u8 legacy_nrates;
/* Index into station database.Returned by update_sta_db call */
u8 peer_id;
/* Non AMPDU sequence number assigned by driver */
u16 seqno;
};
#define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
static const struct ieee80211_channel mwl8k_channels[] = {
{ .center_freq = 2412, .hw_value = 1, },
{ .center_freq = 2417, .hw_value = 2, },
{ .center_freq = 2422, .hw_value = 3, },
{ .center_freq = 2427, .hw_value = 4, },
{ .center_freq = 2432, .hw_value = 5, },
{ .center_freq = 2437, .hw_value = 6, },
{ .center_freq = 2442, .hw_value = 7, },
{ .center_freq = 2447, .hw_value = 8, },
{ .center_freq = 2452, .hw_value = 9, },
{ .center_freq = 2457, .hw_value = 10, },
{ .center_freq = 2462, .hw_value = 11, },
};
static const struct ieee80211_rate mwl8k_rates[] = {
{ .bitrate = 10, .hw_value = 2, },
{ .bitrate = 20, .hw_value = 4, },
{ .bitrate = 55, .hw_value = 11, },
{ .bitrate = 60, .hw_value = 12, },
{ .bitrate = 90, .hw_value = 18, },
{ .bitrate = 110, .hw_value = 22, },
{ .bitrate = 120, .hw_value = 24, },
{ .bitrate = 180, .hw_value = 36, },
{ .bitrate = 240, .hw_value = 48, },
{ .bitrate = 360, .hw_value = 72, },
{ .bitrate = 480, .hw_value = 96, },
{ .bitrate = 540, .hw_value = 108, },
};
/* Set or get info from Firmware */
#define MWL8K_CMD_SET 0x0001
#define MWL8K_CMD_GET 0x0000
/* Firmware command codes */
#define MWL8K_CMD_CODE_DNLD 0x0001
#define MWL8K_CMD_GET_HW_SPEC 0x0003
#define MWL8K_CMD_MAC_MULTICAST_ADR 0x0010
#define MWL8K_CMD_GET_STAT 0x0014
#define MWL8K_CMD_RADIO_CONTROL 0x001c
#define MWL8K_CMD_RF_TX_POWER 0x001e
#define MWL8K_CMD_SET_PRE_SCAN 0x0107
#define MWL8K_CMD_SET_POST_SCAN 0x0108
#define MWL8K_CMD_SET_RF_CHANNEL 0x010a
#define MWL8K_CMD_SET_AID 0x010d
#define MWL8K_CMD_SET_RATE 0x0110
#define MWL8K_CMD_SET_FINALIZE_JOIN 0x0111
#define MWL8K_CMD_RTS_THRESHOLD 0x0113
#define MWL8K_CMD_SET_SLOT 0x0114
#define MWL8K_CMD_SET_EDCA_PARAMS 0x0115
#define MWL8K_CMD_SET_WMM_MODE 0x0123
#define MWL8K_CMD_MIMO_CONFIG 0x0125
#define MWL8K_CMD_USE_FIXED_RATE 0x0126
#define MWL8K_CMD_ENABLE_SNIFFER 0x0150
#define MWL8K_CMD_SET_RATEADAPT_MODE 0x0203
#define MWL8K_CMD_UPDATE_STADB 0x1123
static const char *mwl8k_cmd_name(u16 cmd, char *buf, int bufsize)
{
#define MWL8K_CMDNAME(x) case MWL8K_CMD_##x: do {\
snprintf(buf, bufsize, "%s", #x);\
return buf;\
} while (0)
switch (cmd & ~0x8000) {
MWL8K_CMDNAME(CODE_DNLD);
MWL8K_CMDNAME(GET_HW_SPEC);
MWL8K_CMDNAME(MAC_MULTICAST_ADR);
MWL8K_CMDNAME(GET_STAT);
MWL8K_CMDNAME(RADIO_CONTROL);
MWL8K_CMDNAME(RF_TX_POWER);
MWL8K_CMDNAME(SET_PRE_SCAN);
MWL8K_CMDNAME(SET_POST_SCAN);
MWL8K_CMDNAME(SET_RF_CHANNEL);
MWL8K_CMDNAME(SET_AID);
MWL8K_CMDNAME(SET_RATE);
MWL8K_CMDNAME(SET_FINALIZE_JOIN);
MWL8K_CMDNAME(RTS_THRESHOLD);
MWL8K_CMDNAME(SET_SLOT);
MWL8K_CMDNAME(SET_EDCA_PARAMS);
MWL8K_CMDNAME(SET_WMM_MODE);
MWL8K_CMDNAME(MIMO_CONFIG);
MWL8K_CMDNAME(USE_FIXED_RATE);
MWL8K_CMDNAME(ENABLE_SNIFFER);
MWL8K_CMDNAME(SET_RATEADAPT_MODE);
MWL8K_CMDNAME(UPDATE_STADB);
default:
snprintf(buf, bufsize, "0x%x", cmd);
}
#undef MWL8K_CMDNAME
return buf;
}
/* Hardware and firmware reset */
static void mwl8k_hw_reset(struct mwl8k_priv *priv)
{
iowrite32(MWL8K_H2A_INT_RESET,
priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
iowrite32(MWL8K_H2A_INT_RESET,
priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
msleep(20);
}
/* Release fw image */
static void mwl8k_release_fw(struct firmware **fw)
{
if (*fw == NULL)
return;
release_firmware(*fw);
*fw = NULL;
}
static void mwl8k_release_firmware(struct mwl8k_priv *priv)
{
mwl8k_release_fw(&priv->fw.ucode);
mwl8k_release_fw(&priv->fw.helper);
}
/* Request fw image */
static int mwl8k_request_fw(struct mwl8k_priv *priv,
const char *fname, struct firmware **fw)
{
/* release current image */
if (*fw != NULL)
mwl8k_release_fw(fw);
return request_firmware((const struct firmware **)fw,
fname, &priv->pdev->dev);
}
static int mwl8k_request_firmware(struct mwl8k_priv *priv, u32 part_num)
{
u8 filename[64];
int rc;
priv->part_num = part_num;
snprintf(filename, sizeof(filename),
"mwl8k/helper_%u.fw", priv->part_num);
rc = mwl8k_request_fw(priv, filename, &priv->fw.helper);
if (rc) {
printk(KERN_ERR
"%s Error requesting helper firmware file %s\n",
pci_name(priv->pdev), filename);
return rc;
}
snprintf(filename, sizeof(filename),
"mwl8k/fmimage_%u.fw", priv->part_num);
rc = mwl8k_request_fw(priv, filename, &priv->fw.ucode);
if (rc) {
printk(KERN_ERR "%s Error requesting firmware file %s\n",
pci_name(priv->pdev), filename);
mwl8k_release_fw(&priv->fw.helper);
return rc;
}
return 0;
}
struct mwl8k_cmd_pkt {
__le16 code;
__le16 length;
__le16 seq_num;
__le16 result;
char payload[0];
} __attribute__((packed));
/*
* Firmware loading.
*/
static int
mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
{
void __iomem *regs = priv->regs;
dma_addr_t dma_addr;
int rc;
int loops;
dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
if (pci_dma_mapping_error(priv->pdev, dma_addr))
return -ENOMEM;
iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
iowrite32(0, regs + MWL8K_HIU_INT_CODE);
iowrite32(MWL8K_H2A_INT_DOORBELL,
regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
iowrite32(MWL8K_H2A_INT_DUMMY,
regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
rc = -ETIMEDOUT;
loops = 1000;
do {
u32 int_code;
int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
iowrite32(0, regs + MWL8K_HIU_INT_CODE);
rc = 0;
break;
}
udelay(1);
} while (--loops);
pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
/*
* Clear 'command done' interrupt bit.
*/
loops = 1000;
do {
u32 status;
status = ioread32(priv->regs +
MWL8K_HIU_A2H_INTERRUPT_STATUS);
if (status & MWL8K_A2H_INT_OPC_DONE) {
iowrite32(~MWL8K_A2H_INT_OPC_DONE,
priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
break;
}
udelay(1);
} while (--loops);
return rc;
}
static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
const u8 *data, size_t length)
{
struct mwl8k_cmd_pkt *cmd;
int done;
int rc = 0;
cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
cmd->seq_num = 0;
cmd->result = 0;
done = 0;
while (length) {
int block_size = length > 256 ? 256 : length;
memcpy(cmd->payload, data + done, block_size);
cmd->length = cpu_to_le16(block_size);
rc = mwl8k_send_fw_load_cmd(priv, cmd,
sizeof(*cmd) + block_size);
if (rc)
break;
done += block_size;
length -= block_size;
}
if (!rc) {
cmd->length = 0;
rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
}
kfree(cmd);
return rc;
}
static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
const u8 *data, size_t length)
{
unsigned char *buffer;
int may_continue, rc = 0;
u32 done, prev_block_size;
buffer = kmalloc(1024, GFP_KERNEL);
if (buffer == NULL)
return -ENOMEM;
done = 0;
prev_block_size = 0;
may_continue = 1000;
while (may_continue > 0) {
u32 block_size;
block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
if (block_size & 1) {
block_size &= ~1;
may_continue--;
} else {
done += prev_block_size;
length -= prev_block_size;
}
if (block_size > 1024 || block_size > length) {
rc = -EOVERFLOW;
break;
}
if (length == 0) {
rc = 0;
break;
}
if (block_size == 0) {
rc = -EPROTO;
may_continue--;
udelay(1);
continue;
}
prev_block_size = block_size;
memcpy(buffer, data + done, block_size);
rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
if (rc)
break;
}
if (!rc && length != 0)
rc = -EREMOTEIO;
kfree(buffer);
return rc;
}
static int mwl8k_load_firmware(struct mwl8k_priv *priv)
{
int loops, rc;
const u8 *ucode = priv->fw.ucode->data;
size_t ucode_len = priv->fw.ucode->size;
const u8 *helper = priv->fw.helper->data;
size_t helper_len = priv->fw.helper->size;
if (!memcmp(ucode, "\x01\x00\x00\x00", 4)) {
rc = mwl8k_load_fw_image(priv, helper, helper_len);
if (rc) {
printk(KERN_ERR "%s: unable to load firmware "
"helper image\n", pci_name(priv->pdev));
return rc;
}
msleep(1);
rc = mwl8k_feed_fw_image(priv, ucode, ucode_len);
} else {
rc = mwl8k_load_fw_image(priv, ucode, ucode_len);
}
if (rc) {
printk(KERN_ERR "%s: unable to load firmware data\n",
pci_name(priv->pdev));
return rc;
}
iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
msleep(1);
loops = 200000;
do {
if (ioread32(priv->regs + MWL8K_HIU_INT_CODE)
== MWL8K_FWSTA_READY)
break;
udelay(1);
} while (--loops);
return loops ? 0 : -ETIMEDOUT;
}
/*
* Defines shared between transmission and reception.
*/
/* HT control fields for firmware */
struct ewc_ht_info {
__le16 control1;
__le16 control2;
__le16 control3;
} __attribute__((packed));
/* Firmware Station database operations */
#define MWL8K_STA_DB_ADD_ENTRY 0
#define MWL8K_STA_DB_MODIFY_ENTRY 1
#define MWL8K_STA_DB_DEL_ENTRY 2
#define MWL8K_STA_DB_FLUSH 3
/* Peer Entry flags - used to define the type of the peer node */
#define MWL8K_PEER_TYPE_ACCESSPOINT 2
#define MWL8K_IEEE_LEGACY_DATA_RATES 12
#define MWL8K_MCS_BITMAP_SIZE 16
struct peer_capability_info {
/* Peer type - AP vs. STA. */
__u8 peer_type;
/* Basic 802.11 capabilities from assoc resp. */
__le16 basic_caps;
/* Set if peer supports 802.11n high throughput (HT). */
__u8 ht_support;
/* Valid if HT is supported. */
__le16 ht_caps;
__u8 extended_ht_caps;
struct ewc_ht_info ewc_info;
/* Legacy rate table. Intersection of our rates and peer rates. */
__u8 legacy_rates[MWL8K_IEEE_LEGACY_DATA_RATES];
/* HT rate table. Intersection of our rates and peer rates. */
__u8 ht_rates[MWL8K_MCS_BITMAP_SIZE];
__u8 pad[16];
/* If set, interoperability mode, no proprietary extensions. */
__u8 interop;
__u8 pad2;
__u8 station_id;
__le16 amsdu_enabled;
} __attribute__((packed));
/* Inline functions to manipulate QoS field in data descriptor. */
static inline u16 mwl8k_qos_setbit_eosp(u16 qos)
{
u16 val_mask = 1 << 4;
/* End of Service Period Bit 4 */
return qos | val_mask;
}
static inline u16 mwl8k_qos_setbit_ack(u16 qos, u8 ack_policy)
{
u16 val_mask = 0x3;
u8 shift = 5;
u16 qos_mask = ~(val_mask << shift);
/* Ack Policy Bit 5-6 */
return (qos & qos_mask) | ((ack_policy & val_mask) << shift);
}
static inline u16 mwl8k_qos_setbit_amsdu(u16 qos)
{
u16 val_mask = 1 << 7;
/* AMSDU present Bit 7 */
return qos | val_mask;
}
static inline u16 mwl8k_qos_setbit_qlen(u16 qos, u8 len)
{
u16 val_mask = 0xff;
u8 shift = 8;
u16 qos_mask = ~(val_mask << shift);
/* Queue Length Bits 8-15 */
return (qos & qos_mask) | ((len & val_mask) << shift);
}
/* DMA header used by firmware and hardware. */
struct mwl8k_dma_data {
__le16 fwlen;
struct ieee80211_hdr wh;
} __attribute__((packed));
/* Routines to add/remove DMA header from skb. */
static inline void mwl8k_remove_dma_header(struct sk_buff *skb)
{
struct mwl8k_dma_data *tr = (struct mwl8k_dma_data *)skb->data;
void *dst, *src = &tr->wh;
int hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
u16 space = sizeof(struct mwl8k_dma_data) - hdrlen;
dst = (void *)tr + space;
if (dst != src) {
memmove(dst, src, hdrlen);
skb_pull(skb, space);
}
}
static inline void mwl8k_add_dma_header(struct sk_buff *skb)
{
struct ieee80211_hdr *wh;
u32 hdrlen, pktlen;
struct mwl8k_dma_data *tr;
wh = (struct ieee80211_hdr *)skb->data;
hdrlen = ieee80211_hdrlen(wh->frame_control);
pktlen = skb->len;
/*
* Copy up/down the 802.11 header; the firmware requires
* we present a 2-byte payload length followed by a
* 4-address header (w/o QoS), followed (optionally) by
* any WEP/ExtIV header (but only filled in for CCMP).
*/
if (hdrlen != sizeof(struct mwl8k_dma_data))
skb_push(skb, sizeof(struct mwl8k_dma_data) - hdrlen);
tr = (struct mwl8k_dma_data *)skb->data;
if (wh != &tr->wh)
memmove(&tr->wh, wh, hdrlen);
/* Clear addr4 */
memset(tr->wh.addr4, 0, ETH_ALEN);
/*
* Firmware length is the length of the fully formed "802.11
* payload". That is, everything except for the 802.11 header.
* This includes all crypto material including the MIC.
*/
tr->fwlen = cpu_to_le16(pktlen - hdrlen);
}
/*
* Packet reception.
*/
#define MWL8K_RX_CTRL_OWNED_BY_HOST 0x02
struct mwl8k_rx_desc {
__le16 pkt_len;
__u8 link_quality;
__u8 noise_level;
__le32 pkt_phys_addr;
__le32 next_rx_desc_phys_addr;
__le16 qos_control;
__le16 rate_info;
__le32 pad0[4];
__u8 rssi;
__u8 channel;
__le16 pad1;
__u8 rx_ctrl;
__u8 rx_status;
__u8 pad2[2];
} __attribute__((packed));
#define MWL8K_RX_DESCS 256
#define MWL8K_RX_MAXSZ 3800
static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_rx_queue *rxq = priv->rxq + index;
int size;
int i;
rxq->rx_desc_count = 0;
rxq->rx_head = 0;
rxq->rx_tail = 0;
size = MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc);
rxq->rx_desc_area =
pci_alloc_consistent(priv->pdev, size, &rxq->rx_desc_dma);
if (rxq->rx_desc_area == NULL) {
printk(KERN_ERR "%s: failed to alloc RX descriptors\n",
priv->name);
return -ENOMEM;
}
memset(rxq->rx_desc_area, 0, size);
rxq->rx_skb = kmalloc(MWL8K_RX_DESCS *
sizeof(*rxq->rx_skb), GFP_KERNEL);
if (rxq->rx_skb == NULL) {
printk(KERN_ERR "%s: failed to alloc RX skbuff list\n",
priv->name);
pci_free_consistent(priv->pdev, size,
rxq->rx_desc_area, rxq->rx_desc_dma);
return -ENOMEM;
}
memset(rxq->rx_skb, 0, MWL8K_RX_DESCS * sizeof(*rxq->rx_skb));
for (i = 0; i < MWL8K_RX_DESCS; i++) {
struct mwl8k_rx_desc *rx_desc;
int nexti;
rx_desc = rxq->rx_desc_area + i;
nexti = (i + 1) % MWL8K_RX_DESCS;
rx_desc->next_rx_desc_phys_addr =
cpu_to_le32(rxq->rx_desc_dma
+ nexti * sizeof(*rx_desc));
rx_desc->rx_ctrl = MWL8K_RX_CTRL_OWNED_BY_HOST;
}
return 0;
}
static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_rx_queue *rxq = priv->rxq + index;
int refilled;
refilled = 0;
while (rxq->rx_desc_count < MWL8K_RX_DESCS && limit--) {
struct sk_buff *skb;
int rx;
skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
if (skb == NULL)
break;
rxq->rx_desc_count++;
rx = rxq->rx_tail;
rxq->rx_tail = (rx + 1) % MWL8K_RX_DESCS;
rxq->rx_desc_area[rx].pkt_phys_addr =
cpu_to_le32(pci_map_single(priv->pdev, skb->data,
MWL8K_RX_MAXSZ, DMA_FROM_DEVICE));
rxq->rx_desc_area[rx].pkt_len = cpu_to_le16(MWL8K_RX_MAXSZ);
rxq->rx_skb[rx] = skb;
wmb();
rxq->rx_desc_area[rx].rx_ctrl = 0;
refilled++;
}
return refilled;
}
/* Must be called only when the card's reception is completely halted */
static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_rx_queue *rxq = priv->rxq + index;
int i;
for (i = 0; i < MWL8K_RX_DESCS; i++) {
if (rxq->rx_skb[i] != NULL) {
unsigned long addr;
addr = le32_to_cpu(rxq->rx_desc_area[i].pkt_phys_addr);
pci_unmap_single(priv->pdev, addr, MWL8K_RX_MAXSZ,
PCI_DMA_FROMDEVICE);
kfree_skb(rxq->rx_skb[i]);
rxq->rx_skb[i] = NULL;
}
}
kfree(rxq->rx_skb);
rxq->rx_skb = NULL;
pci_free_consistent(priv->pdev,
MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc),
rxq->rx_desc_area, rxq->rx_desc_dma);
rxq->rx_desc_area = NULL;
}
/*
* Scan a list of BSSIDs to process for finalize join.
* Allows for extension to process multiple BSSIDs.
*/
static inline int
mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
{
return priv->capture_beacon &&
ieee80211_is_beacon(wh->frame_control) &&
!compare_ether_addr(wh->addr3, priv->capture_bssid);
}
static inline void mwl8k_save_beacon(struct mwl8k_priv *priv,
struct sk_buff *skb)
{
priv->capture_beacon = false;
memset(priv->capture_bssid, 0, ETH_ALEN);
/*
* Use GFP_ATOMIC as rxq_process is called from
* the primary interrupt handler, memory allocation call
* must not sleep.
*/
priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
if (priv->beacon_skb != NULL)
queue_work(priv->config_wq,
&priv->finalize_join_worker);
}
static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_rx_queue *rxq = priv->rxq + index;
int processed;
processed = 0;
while (rxq->rx_desc_count && limit--) {
struct mwl8k_rx_desc *rx_desc;
struct sk_buff *skb;
struct ieee80211_rx_status status;
unsigned long addr;
struct ieee80211_hdr *wh;
rx_desc = rxq->rx_desc_area + rxq->rx_head;
if (!(rx_desc->rx_ctrl & MWL8K_RX_CTRL_OWNED_BY_HOST))
break;
rmb();
skb = rxq->rx_skb[rxq->rx_head];
if (skb == NULL)
break;
rxq->rx_skb[rxq->rx_head] = NULL;
rxq->rx_head = (rxq->rx_head + 1) % MWL8K_RX_DESCS;
rxq->rx_desc_count--;
addr = le32_to_cpu(rx_desc->pkt_phys_addr);
pci_unmap_single(priv->pdev, addr,
MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
skb_put(skb, le16_to_cpu(rx_desc->pkt_len));
mwl8k_remove_dma_header(skb);
wh = (struct ieee80211_hdr *)skb->data;
/*
* Check for pending join operation. save a copy of
* the beacon and schedule a tasklet to send finalize
* join command to the firmware.
*/
if (mwl8k_capture_bssid(priv, wh))
mwl8k_save_beacon(priv, skb);
memset(&status, 0, sizeof(status));
status.mactime = 0;
status.signal = -rx_desc->rssi;
status.noise = -rx_desc->noise_level;
status.qual = rx_desc->link_quality;
status.antenna = 1;
status.rate_idx = 1;
status.flag = 0;
status.band = IEEE80211_BAND_2GHZ;
status.freq = ieee80211_channel_to_frequency(rx_desc->channel);
memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
ieee80211_rx_irqsafe(hw, skb);
processed++;
}
return processed;
}
/*
* Packet transmission.
*/
/* Transmit queue assignment. */
enum {
MWL8K_WME_AC_BK = 0, /* background access */
MWL8K_WME_AC_BE = 1, /* best effort access */
MWL8K_WME_AC_VI = 2, /* video access */
MWL8K_WME_AC_VO = 3, /* voice access */
};
/* Transmit packet ACK policy */
#define MWL8K_TXD_ACK_POLICY_NORMAL 0
#define MWL8K_TXD_ACK_POLICY_BLOCKACK 3
#define GET_TXQ(_ac) (\
((_ac) == WME_AC_VO) ? MWL8K_WME_AC_VO : \
((_ac) == WME_AC_VI) ? MWL8K_WME_AC_VI : \
((_ac) == WME_AC_BK) ? MWL8K_WME_AC_BK : \
MWL8K_WME_AC_BE)
#define MWL8K_TXD_STATUS_OK 0x00000001
#define MWL8K_TXD_STATUS_OK_RETRY 0x00000002
#define MWL8K_TXD_STATUS_OK_MORE_RETRY 0x00000004
#define MWL8K_TXD_STATUS_MULTICAST_TX 0x00000008
#define MWL8K_TXD_STATUS_FW_OWNED 0x80000000
struct mwl8k_tx_desc {
__le32 status;
__u8 data_rate;
__u8 tx_priority;
__le16 qos_control;
__le32 pkt_phys_addr;
__le16 pkt_len;
__u8 dest_MAC_addr[ETH_ALEN];
__le32 next_tx_desc_phys_addr;
__le32 reserved;
__le16 rate_info;
__u8 peer_id;
__u8 tx_frag_cnt;
} __attribute__((packed));
#define MWL8K_TX_DESCS 128
static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_tx_queue *txq = priv->txq + index;
int size;
int i;
memset(&txq->tx_stats, 0, sizeof(struct ieee80211_tx_queue_stats));
txq->tx_stats.limit = MWL8K_TX_DESCS;
txq->tx_head = 0;
txq->tx_tail = 0;
size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
txq->tx_desc_area =
pci_alloc_consistent(priv->pdev, size, &txq->tx_desc_dma);
if (txq->tx_desc_area == NULL) {
printk(KERN_ERR "%s: failed to alloc TX descriptors\n",
priv->name);
return -ENOMEM;
}
memset(txq->tx_desc_area, 0, size);
txq->tx_skb = kmalloc(MWL8K_TX_DESCS * sizeof(*txq->tx_skb),
GFP_KERNEL);
if (txq->tx_skb == NULL) {
printk(KERN_ERR "%s: failed to alloc TX skbuff list\n",
priv->name);
pci_free_consistent(priv->pdev, size,
txq->tx_desc_area, txq->tx_desc_dma);
return -ENOMEM;
}
memset(txq->tx_skb, 0, MWL8K_TX_DESCS * sizeof(*txq->tx_skb));
for (i = 0; i < MWL8K_TX_DESCS; i++) {
struct mwl8k_tx_desc *tx_desc;
int nexti;
tx_desc = txq->tx_desc_area + i;
nexti = (i + 1) % MWL8K_TX_DESCS;
tx_desc->status = 0;
tx_desc->next_tx_desc_phys_addr =
cpu_to_le32(txq->tx_desc_dma +
nexti * sizeof(*tx_desc));
}
return 0;
}
static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
{
iowrite32(MWL8K_H2A_INT_PPA_READY,
priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
iowrite32(MWL8K_H2A_INT_DUMMY,
priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
ioread32(priv->regs + MWL8K_HIU_INT_CODE);
}
static inline int mwl8k_txq_busy(struct mwl8k_priv *priv)
{
return priv->pending_tx_pkts;
}
struct mwl8k_txq_info {
u32 fw_owned;
u32 drv_owned;
u32 unused;
u32 len;
u32 head;
u32 tail;
};
static int mwl8k_scan_tx_ring(struct mwl8k_priv *priv,
struct mwl8k_txq_info txinfo[],
u32 num_queues)
{
int count, desc, status;
struct mwl8k_tx_queue *txq;
struct mwl8k_tx_desc *tx_desc;
int ndescs = 0;
memset(txinfo, 0, num_queues * sizeof(struct mwl8k_txq_info));
spin_lock_bh(&priv->tx_lock);
for (count = 0; count < num_queues; count++) {
txq = priv->txq + count;
txinfo[count].len = txq->tx_stats.len;
txinfo[count].head = txq->tx_head;
txinfo[count].tail = txq->tx_tail;
for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
tx_desc = txq->tx_desc_area + desc;
status = le32_to_cpu(tx_desc->status);
if (status & MWL8K_TXD_STATUS_FW_OWNED)
txinfo[count].fw_owned++;
else
txinfo[count].drv_owned++;
if (tx_desc->pkt_len == 0)
txinfo[count].unused++;
}
}
spin_unlock_bh(&priv->tx_lock);
return ndescs;
}
static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw, u32 delay_ms)
{
struct mwl8k_priv *priv = hw->priv;
DECLARE_COMPLETION_ONSTACK(cmd_wait);
u32 count;
unsigned long timeout;
might_sleep();
if (priv->tx_wait != NULL)
printk(KERN_ERR "WARNING Previous TXWaitEmpty instance\n");
spin_lock_bh(&priv->tx_lock);
count = mwl8k_txq_busy(priv);
if (count) {
priv->tx_wait = &cmd_wait;
if (priv->radio_on)
mwl8k_tx_start(priv);
}
spin_unlock_bh(&priv->tx_lock);
if (count) {
struct mwl8k_txq_info txinfo[4];
int index;
int newcount;
timeout = wait_for_completion_timeout(&cmd_wait,
msecs_to_jiffies(delay_ms));
if (timeout)
return 0;
spin_lock_bh(&priv->tx_lock);
priv->tx_wait = NULL;
newcount = mwl8k_txq_busy(priv);
spin_unlock_bh(&priv->tx_lock);
printk(KERN_ERR "%s(%u) TIMEDOUT:%ums Pend:%u-->%u\n",
__func__, __LINE__, delay_ms, count, newcount);
mwl8k_scan_tx_ring(priv, txinfo, 4);
for (index = 0; index < 4; index++)
printk(KERN_ERR
"TXQ:%u L:%u H:%u T:%u FW:%u DRV:%u U:%u\n",
index,
txinfo[index].len,
txinfo[index].head,
txinfo[index].tail,
txinfo[index].fw_owned,
txinfo[index].drv_owned,
txinfo[index].unused);
return -ETIMEDOUT;
}
return 0;
}
#define MWL8K_TXD_SUCCESS(status) \
((status) & (MWL8K_TXD_STATUS_OK | \
MWL8K_TXD_STATUS_OK_RETRY | \
MWL8K_TXD_STATUS_OK_MORE_RETRY))
static void mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int force)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_tx_queue *txq = priv->txq + index;
int wake = 0;
while (txq->tx_stats.len > 0) {
int tx;
struct mwl8k_tx_desc *tx_desc;
unsigned long addr;
int size;
struct sk_buff *skb;
struct ieee80211_tx_info *info;
u32 status;
tx = txq->tx_head;
tx_desc = txq->tx_desc_area + tx;
status = le32_to_cpu(tx_desc->status);
if (status & MWL8K_TXD_STATUS_FW_OWNED) {
if (!force)
break;
tx_desc->status &=
~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
}
txq->tx_head = (tx + 1) % MWL8K_TX_DESCS;
BUG_ON(txq->tx_stats.len == 0);
txq->tx_stats.len--;
priv->pending_tx_pkts--;
addr = le32_to_cpu(tx_desc->pkt_phys_addr);
size = le16_to_cpu(tx_desc->pkt_len);
skb = txq->tx_skb[tx];
txq->tx_skb[tx] = NULL;
BUG_ON(skb == NULL);
pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
mwl8k_remove_dma_header(skb);
/* Mark descriptor as unused */
tx_desc->pkt_phys_addr = 0;
tx_desc->pkt_len = 0;
info = IEEE80211_SKB_CB(skb);
ieee80211_tx_info_clear_status(info);
if (MWL8K_TXD_SUCCESS(status))
info->flags |= IEEE80211_TX_STAT_ACK;
ieee80211_tx_status_irqsafe(hw, skb);
wake = !priv->inconfig && priv->radio_on;
}
if (wake)
ieee80211_wake_queue(hw, index);
}
/* must be called only when the card's transmit is completely halted */
static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_tx_queue *txq = priv->txq + index;
mwl8k_txq_reclaim(hw, index, 1);
kfree(txq->tx_skb);
txq->tx_skb = NULL;
pci_free_consistent(priv->pdev,
MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
txq->tx_desc_area, txq->tx_desc_dma);
txq->tx_desc_area = NULL;
}
static int
mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
{
struct mwl8k_priv *priv = hw->priv;
struct ieee80211_tx_info *tx_info;
struct ieee80211_hdr *wh;
struct mwl8k_tx_queue *txq;
struct mwl8k_tx_desc *tx;
struct mwl8k_dma_data *tr;
struct mwl8k_vif *mwl8k_vif;
dma_addr_t dma;
u16 qos = 0;
bool qosframe = false, ampduframe = false;
bool mcframe = false, eapolframe = false;
bool amsduframe = false;
__le16 fc;
txq = priv->txq + index;
tx = txq->tx_desc_area + txq->tx_tail;
BUG_ON(txq->tx_skb[txq->tx_tail] != NULL);
/*
* Append HW DMA header to start of packet.
*/
mwl8k_add_dma_header(skb);
tx_info = IEEE80211_SKB_CB(skb);
mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
tr = (struct mwl8k_dma_data *)skb->data;
wh = &tr->wh;
fc = wh->frame_control;
qosframe = ieee80211_is_data_qos(fc);
mcframe = is_multicast_ether_addr(wh->addr1);
ampduframe = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
u16 seqno = mwl8k_vif->seqno;
wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
wh->seq_ctrl |= cpu_to_le16(seqno << 4);
mwl8k_vif->seqno = seqno++ % 4096;
}
if (qosframe)
qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
dma = pci_map_single(priv->pdev, skb->data,
skb->len, PCI_DMA_TODEVICE);
if (pci_dma_mapping_error(priv->pdev, dma)) {
printk(KERN_DEBUG "%s: failed to dma map skb, "
"dropping TX frame.\n", priv->name);
if (skb != NULL)
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
/* Set desc header, cpu bit order. */
tx->status = 0;
tx->data_rate = 0;
tx->tx_priority = index;
tx->qos_control = 0;
tx->rate_info = 0;
tx->peer_id = mwl8k_vif->peer_id;
amsduframe = !!(qos & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT);
/* Setup firmware control bit fields for each frame type. */
if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)) {
tx->data_rate = 0;
qos = mwl8k_qos_setbit_eosp(qos);
/* Set Queue size to unspecified */
qos = mwl8k_qos_setbit_qlen(qos, 0xff);
} else if (ieee80211_is_data(fc)) {
tx->data_rate = 1;
if (mcframe)
tx->status |= MWL8K_TXD_STATUS_MULTICAST_TX;
/*
* Tell firmware to not send EAPOL pkts in an
* aggregate. Verify against mac80211 tx path. If
* stack turns off AMPDU for an EAPOL frame this
* check will be removed.
*/
if (eapolframe) {
qos = mwl8k_qos_setbit_ack(qos,
MWL8K_TXD_ACK_POLICY_NORMAL);
} else {
/* Send pkt in an aggregate if AMPDU frame. */
if (ampduframe)
qos = mwl8k_qos_setbit_ack(qos,
MWL8K_TXD_ACK_POLICY_BLOCKACK);
else
qos = mwl8k_qos_setbit_ack(qos,
MWL8K_TXD_ACK_POLICY_NORMAL);
if (amsduframe)
qos = mwl8k_qos_setbit_amsdu(qos);
}
}
/* Convert to little endian */
tx->qos_control = cpu_to_le16(qos);
tx->status = cpu_to_le32(tx->status);
tx->pkt_phys_addr = cpu_to_le32(dma);
tx->pkt_len = cpu_to_le16(skb->len);
txq->tx_skb[txq->tx_tail] = skb;
spin_lock_bh(&priv->tx_lock);
tx->status = cpu_to_le32(MWL8K_TXD_STATUS_OK |
MWL8K_TXD_STATUS_FW_OWNED);
wmb();
txq->tx_stats.len++;
priv->pending_tx_pkts++;
txq->tx_stats.count++;
txq->tx_tail++;
if (txq->tx_tail == MWL8K_TX_DESCS)
txq->tx_tail = 0;
if (txq->tx_head == txq->tx_tail)
ieee80211_stop_queue(hw, index);
if (priv->inconfig) {
/*
* Silently queue packet when we are in the middle of
* a config cycle. Notify firmware only if we are
* waiting for TXQs to empty. If a packet is sent
* before .config() is complete, perhaps it is better
* to drop the packet, as the channel is being changed
* and the packet will end up on the wrong channel.
*/
printk(KERN_ERR "%s(): WARNING TX activity while "
"in config\n", __func__);
if (priv->tx_wait != NULL)
mwl8k_tx_start(priv);
} else
mwl8k_tx_start(priv);
spin_unlock_bh(&priv->tx_lock);
return NETDEV_TX_OK;
}
/*
* Command processing.
*/
/* Timeout firmware commands after 2000ms */
#define MWL8K_CMD_TIMEOUT_MS 2000
static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
{
DECLARE_COMPLETION_ONSTACK(cmd_wait);
struct mwl8k_priv *priv = hw->priv;
void __iomem *regs = priv->regs;
dma_addr_t dma_addr;
unsigned int dma_size;
int rc;
unsigned long timeout = 0;
u8 buf[32];
cmd->result = 0xFFFF;
dma_size = le16_to_cpu(cmd->length);
dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(priv->pdev, dma_addr))
return -ENOMEM;
if (priv->hostcmd_wait != NULL)
printk(KERN_ERR "WARNING host command in progress\n");
spin_lock_irq(&priv->fw_lock);
priv->hostcmd_wait = &cmd_wait;
iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
iowrite32(MWL8K_H2A_INT_DOORBELL,
regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
iowrite32(MWL8K_H2A_INT_DUMMY,
regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
spin_unlock_irq(&priv->fw_lock);
timeout = wait_for_completion_timeout(&cmd_wait,
msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
pci_unmap_single(priv->pdev, dma_addr, dma_size,
PCI_DMA_BIDIRECTIONAL);
if (!timeout) {
spin_lock_irq(&priv->fw_lock);
priv->hostcmd_wait = NULL;
spin_unlock_irq(&priv->fw_lock);
printk(KERN_ERR "%s: Command %s timeout after %u ms\n",
priv->name,
mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
MWL8K_CMD_TIMEOUT_MS);
rc = -ETIMEDOUT;
} else {
rc = cmd->result ? -EINVAL : 0;
if (rc)
printk(KERN_ERR "%s: Command %s error 0x%x\n",
priv->name,
mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
cmd->result);
}
return rc;
}
/*
* GET_HW_SPEC.
*/
struct mwl8k_cmd_get_hw_spec {
struct mwl8k_cmd_pkt header;
__u8 hw_rev;
__u8 host_interface;
__le16 num_mcaddrs;
__u8 perm_addr[ETH_ALEN];
__le16 region_code;
__le32 fw_rev;
__le32 ps_cookie;
__le32 caps;
__u8 mcs_bitmap[16];
__le32 rx_queue_ptr;
__le32 num_tx_queues;
__le32 tx_queue_ptrs[MWL8K_TX_QUEUES];
__le32 caps2;
__le32 num_tx_desc_per_queue;
__le32 total_rx_desc;
} __attribute__((packed));
static int mwl8k_cmd_get_hw_spec(struct ieee80211_hw *hw)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_cmd_get_hw_spec *cmd;
int rc;
int i;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rx_desc_dma);
cmd->num_tx_queues = cpu_to_le32(MWL8K_TX_QUEUES);
for (i = 0; i < MWL8K_TX_QUEUES; i++)
cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].tx_desc_dma);
cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
cmd->total_rx_desc = cpu_to_le32(MWL8K_RX_DESCS);
rc = mwl8k_post_cmd(hw, &cmd->header);
if (!rc) {
SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
priv->fw_rev = le32_to_cpu(cmd->fw_rev);
priv->hw_rev = cmd->hw_rev;
}
kfree(cmd);
return rc;
}
/*
* CMD_MAC_MULTICAST_ADR.
*/
struct mwl8k_cmd_mac_multicast_adr {
struct mwl8k_cmd_pkt header;
__le16 action;
__le16 numaddr;
__u8 addr[0][ETH_ALEN];
};
#define MWL8K_ENABLE_RX_MULTICAST 0x000F
static struct mwl8k_cmd_pkt *
__mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw,
int mc_count, struct dev_addr_list *mclist)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_cmd_mac_multicast_adr *cmd;
int size;
int i;
if (mc_count > priv->num_mcaddrs)
mc_count = priv->num_mcaddrs;
size = sizeof(*cmd) + mc_count * ETH_ALEN;
cmd = kzalloc(size, GFP_ATOMIC);
if (cmd == NULL)
return NULL;
cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
cmd->header.length = cpu_to_le16(size);
cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
cmd->numaddr = cpu_to_le16(mc_count);
for (i = 0; i < mc_count && mclist; i++) {
if (mclist->da_addrlen != ETH_ALEN) {
kfree(cmd);
return NULL;
}
memcpy(cmd->addr[i], mclist->da_addr, ETH_ALEN);
mclist = mclist->next;
}
return &cmd->header;
}
/*
* CMD_802_11_GET_STAT.
*/
struct mwl8k_cmd_802_11_get_stat {
struct mwl8k_cmd_pkt header;
__le16 action;
__le32 stats[64];
} __attribute__((packed));
#define MWL8K_STAT_ACK_FAILURE 9
#define MWL8K_STAT_RTS_FAILURE 12
#define MWL8K_STAT_FCS_ERROR 24
#define MWL8K_STAT_RTS_SUCCESS 11
static int mwl8k_cmd_802_11_get_stat(struct ieee80211_hw *hw,
struct ieee80211_low_level_stats *stats)
{
struct mwl8k_cmd_802_11_get_stat *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(MWL8K_CMD_GET);
rc = mwl8k_post_cmd(hw, &cmd->header);
if (!rc) {
stats->dot11ACKFailureCount =
le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
stats->dot11RTSFailureCount =
le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
stats->dot11FCSErrorCount =
le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
stats->dot11RTSSuccessCount =
le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
}
kfree(cmd);
return rc;
}
/*
* CMD_802_11_RADIO_CONTROL.
*/
struct mwl8k_cmd_802_11_radio_control {
struct mwl8k_cmd_pkt header;
__le16 action;
__le16 control;
__le16 radio_on;
} __attribute__((packed));
static int
mwl8k_cmd_802_11_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_cmd_802_11_radio_control *cmd;
int rc;
if (enable == priv->radio_on && !force)
return 0;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(MWL8K_CMD_SET);
cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
if (!rc)
priv->radio_on = enable;
return rc;
}
static int mwl8k_cmd_802_11_radio_disable(struct ieee80211_hw *hw)
{
return mwl8k_cmd_802_11_radio_control(hw, 0, 0);
}
static int mwl8k_cmd_802_11_radio_enable(struct ieee80211_hw *hw)
{
return mwl8k_cmd_802_11_radio_control(hw, 1, 0);
}
static int
mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
{
struct mwl8k_priv *priv;
if (hw == NULL || hw->priv == NULL)
return -EINVAL;
priv = hw->priv;
priv->radio_short_preamble = short_preamble;
return mwl8k_cmd_802_11_radio_control(hw, 1, 1);
}
/*
* CMD_802_11_RF_TX_POWER.
*/
#define MWL8K_TX_POWER_LEVEL_TOTAL 8
struct mwl8k_cmd_802_11_rf_tx_power {
struct mwl8k_cmd_pkt header;
__le16 action;
__le16 support_level;
__le16 current_level;
__le16 reserved;
__le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
} __attribute__((packed));
static int mwl8k_cmd_802_11_rf_tx_power(struct ieee80211_hw *hw, int dBm)
{
struct mwl8k_cmd_802_11_rf_tx_power *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(MWL8K_CMD_SET);
cmd->support_level = cpu_to_le16(dBm);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_SET_PRE_SCAN.
*/
struct mwl8k_cmd_set_pre_scan {
struct mwl8k_cmd_pkt header;
} __attribute__((packed));
static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
{
struct mwl8k_cmd_set_pre_scan *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_SET_POST_SCAN.
*/
struct mwl8k_cmd_set_post_scan {
struct mwl8k_cmd_pkt header;
__le32 isibss;
__u8 bssid[ETH_ALEN];
} __attribute__((packed));
static int
mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, __u8 *mac)
{
struct mwl8k_cmd_set_post_scan *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->isibss = 0;
memcpy(cmd->bssid, mac, ETH_ALEN);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_SET_RF_CHANNEL.
*/
struct mwl8k_cmd_set_rf_channel {
struct mwl8k_cmd_pkt header;
__le16 action;
__u8 current_channel;
__le32 channel_flags;
} __attribute__((packed));
static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
struct ieee80211_channel *channel)
{
struct mwl8k_cmd_set_rf_channel *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(MWL8K_CMD_SET);
cmd->current_channel = channel->hw_value;
if (channel->band == IEEE80211_BAND_2GHZ)
cmd->channel_flags = cpu_to_le32(0x00000081);
else
cmd->channel_flags = cpu_to_le32(0x00000000);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_SET_SLOT.
*/
struct mwl8k_cmd_set_slot {
struct mwl8k_cmd_pkt header;
__le16 action;
__u8 short_slot;
} __attribute__((packed));
static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
{
struct mwl8k_cmd_set_slot *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(MWL8K_CMD_SET);
cmd->short_slot = short_slot_time;
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_MIMO_CONFIG.
*/
struct mwl8k_cmd_mimo_config {
struct mwl8k_cmd_pkt header;
__le32 action;
__u8 rx_antenna_map;
__u8 tx_antenna_map;
} __attribute__((packed));
static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
{
struct mwl8k_cmd_mimo_config *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
cmd->rx_antenna_map = rx;
cmd->tx_antenna_map = tx;
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_ENABLE_SNIFFER.
*/
struct mwl8k_cmd_enable_sniffer {
struct mwl8k_cmd_pkt header;
__le32 action;
} __attribute__((packed));
static int mwl8k_enable_sniffer(struct ieee80211_hw *hw, bool enable)
{
struct mwl8k_cmd_enable_sniffer *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le32(!!enable);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_SET_RATEADAPT_MODE.
*/
struct mwl8k_cmd_set_rate_adapt_mode {
struct mwl8k_cmd_pkt header;
__le16 action;
__le16 mode;
} __attribute__((packed));
static int mwl8k_cmd_setrateadaptmode(struct ieee80211_hw *hw, __u16 mode)
{
struct mwl8k_cmd_set_rate_adapt_mode *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(MWL8K_CMD_SET);
cmd->mode = cpu_to_le16(mode);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_SET_WMM_MODE.
*/
struct mwl8k_cmd_set_wmm {
struct mwl8k_cmd_pkt header;
__le16 action;
} __attribute__((packed));
static int mwl8k_set_wmm(struct ieee80211_hw *hw, bool enable)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_cmd_set_wmm *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(!!enable);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
if (!rc)
priv->wmm_enabled = enable;
return rc;
}
/*
* CMD_SET_RTS_THRESHOLD.
*/
struct mwl8k_cmd_rts_threshold {
struct mwl8k_cmd_pkt header;
__le16 action;
__le16 threshold;
} __attribute__((packed));
static int mwl8k_rts_threshold(struct ieee80211_hw *hw,
u16 action, u16 *threshold)
{
struct mwl8k_cmd_rts_threshold *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(action);
cmd->threshold = cpu_to_le16(*threshold);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_SET_EDCA_PARAMS.
*/
struct mwl8k_cmd_set_edca_params {
struct mwl8k_cmd_pkt header;
/* See MWL8K_SET_EDCA_XXX below */
__le16 action;
/* TX opportunity in units of 32 us */
__le16 txop;
/* Log exponent of max contention period: 0...15*/
__u8 log_cw_max;
/* Log exponent of min contention period: 0...15 */
__u8 log_cw_min;
/* Adaptive interframe spacing in units of 32us */
__u8 aifs;
/* TX queue to configure */
__u8 txq;
} __attribute__((packed));
#define MWL8K_SET_EDCA_CW 0x01
#define MWL8K_SET_EDCA_TXOP 0x02
#define MWL8K_SET_EDCA_AIFS 0x04
#define MWL8K_SET_EDCA_ALL (MWL8K_SET_EDCA_CW | \
MWL8K_SET_EDCA_TXOP | \
MWL8K_SET_EDCA_AIFS)
static int
mwl8k_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
__u16 cw_min, __u16 cw_max,
__u8 aifs, __u16 txop)
{
struct mwl8k_cmd_set_edca_params *cmd;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
cmd->txop = cpu_to_le16(txop);
cmd->log_cw_max = (u8)ilog2(cw_max + 1);
cmd->log_cw_min = (u8)ilog2(cw_min + 1);
cmd->aifs = aifs;
cmd->txq = qnum;
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_FINALIZE_JOIN.
*/
/* FJ beacon buffer size is compiled into the firmware. */
#define MWL8K_FJ_BEACON_MAXLEN 128
struct mwl8k_cmd_finalize_join {
struct mwl8k_cmd_pkt header;
__le32 sleep_interval; /* Number of beacon periods to sleep */
__u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
} __attribute__((packed));
static int mwl8k_finalize_join(struct ieee80211_hw *hw, void *frame,
__u16 framelen, __u16 dtim)
{
struct mwl8k_cmd_finalize_join *cmd;
struct ieee80211_mgmt *payload = frame;
u16 hdrlen;
u32 payload_len;
int rc;
if (frame == NULL)
return -EINVAL;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
hdrlen = ieee80211_hdrlen(payload->frame_control);
payload_len = framelen > hdrlen ? framelen - hdrlen : 0;
/* XXX TBD Might just have to abort and return an error */
if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
printk(KERN_ERR "%s(): WARNING: Incomplete beacon "
"sent to firmware. Sz=%u MAX=%u\n", __func__,
payload_len, MWL8K_FJ_BEACON_MAXLEN);
if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
payload_len = MWL8K_FJ_BEACON_MAXLEN;
if (payload && payload_len)
memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_UPDATE_STADB.
*/
struct mwl8k_cmd_update_sta_db {
struct mwl8k_cmd_pkt header;
/* See STADB_ACTION_TYPE */
__le32 action;
/* Peer MAC address */
__u8 peer_addr[ETH_ALEN];
__le32 reserved;
/* Peer info - valid during add/update. */
struct peer_capability_info peer_info;
} __attribute__((packed));
static int mwl8k_cmd_update_sta_db(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, __u32 action)
{
struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
struct ieee80211_bss_conf *info = &mv_vif->bss_info;
struct mwl8k_cmd_update_sta_db *cmd;
struct peer_capability_info *peer_info;
struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
int rc;
__u8 count, *rates;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le32(action);
peer_info = &cmd->peer_info;
memcpy(cmd->peer_addr, mv_vif->bssid, ETH_ALEN);
switch (action) {
case MWL8K_STA_DB_ADD_ENTRY:
case MWL8K_STA_DB_MODIFY_ENTRY:
/* Build peer_info block */
peer_info->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
peer_info->basic_caps = cpu_to_le16(info->assoc_capability);
peer_info->interop = 1;
peer_info->amsdu_enabled = 0;
rates = peer_info->legacy_rates;
for (count = 0; count < mv_vif->legacy_nrates; count++)
rates[count] = bitrates[count].hw_value;
rc = mwl8k_post_cmd(hw, &cmd->header);
if (rc == 0)
mv_vif->peer_id = peer_info->station_id;
break;
case MWL8K_STA_DB_DEL_ENTRY:
case MWL8K_STA_DB_FLUSH:
default:
rc = mwl8k_post_cmd(hw, &cmd->header);
if (rc == 0)
mv_vif->peer_id = 0;
break;
}
kfree(cmd);
return rc;
}
/*
* CMD_SET_AID.
*/
#define MWL8K_RATE_INDEX_MAX_ARRAY 14
#define MWL8K_FRAME_PROT_DISABLED 0x00
#define MWL8K_FRAME_PROT_11G 0x07
#define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY 0x02
#define MWL8K_FRAME_PROT_11N_HT_ALL 0x06
struct mwl8k_cmd_update_set_aid {
struct mwl8k_cmd_pkt header;
__le16 aid;
/* AP's MAC address (BSSID) */
__u8 bssid[ETH_ALEN];
__le16 protection_mode;
__u8 supp_rates[MWL8K_RATE_INDEX_MAX_ARRAY];
} __attribute__((packed));
static int mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
struct ieee80211_bss_conf *info = &mv_vif->bss_info;
struct mwl8k_cmd_update_set_aid *cmd;
struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
int count;
u16 prot_mode;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->aid = cpu_to_le16(info->aid);
memcpy(cmd->bssid, mv_vif->bssid, ETH_ALEN);
if (info->use_cts_prot) {
prot_mode = MWL8K_FRAME_PROT_11G;
} else {
switch (info->ht_operation_mode &
IEEE80211_HT_OP_MODE_PROTECTION) {
case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
break;
case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
break;
default:
prot_mode = MWL8K_FRAME_PROT_DISABLED;
break;
}
}
cmd->protection_mode = cpu_to_le16(prot_mode);
for (count = 0; count < mv_vif->legacy_nrates; count++)
cmd->supp_rates[count] = bitrates[count].hw_value;
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_SET_RATE.
*/
struct mwl8k_cmd_update_rateset {
struct mwl8k_cmd_pkt header;
__u8 legacy_rates[MWL8K_RATE_INDEX_MAX_ARRAY];
/* Bitmap for supported MCS codes. */
__u8 mcs_set[MWL8K_IEEE_LEGACY_DATA_RATES];
__u8 reserved[MWL8K_IEEE_LEGACY_DATA_RATES];
} __attribute__((packed));
static int mwl8k_update_rateset(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
struct mwl8k_cmd_update_rateset *cmd;
struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
int count;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
for (count = 0; count < mv_vif->legacy_nrates; count++)
cmd->legacy_rates[count] = bitrates[count].hw_value;
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* CMD_USE_FIXED_RATE.
*/
#define MWL8K_RATE_TABLE_SIZE 8
#define MWL8K_UCAST_RATE 0
#define MWL8K_USE_AUTO_RATE 0x0002
struct mwl8k_rate_entry {
/* Set to 1 if HT rate, 0 if legacy. */
__le32 is_ht_rate;
/* Set to 1 to use retry_count field. */
__le32 enable_retry;
/* Specified legacy rate or MCS. */
__le32 rate;
/* Number of allowed retries. */
__le32 retry_count;
} __attribute__((packed));
struct mwl8k_rate_table {
/* 1 to allow specified rate and below */
__le32 allow_rate_drop;
__le32 num_rates;
struct mwl8k_rate_entry rate_entry[MWL8K_RATE_TABLE_SIZE];
} __attribute__((packed));
struct mwl8k_cmd_use_fixed_rate {
struct mwl8k_cmd_pkt header;
__le32 action;
struct mwl8k_rate_table rate_table;
/* Unicast, Broadcast or Multicast */
__le32 rate_type;
__le32 reserved1;
__le32 reserved2;
} __attribute__((packed));
static int mwl8k_cmd_use_fixed_rate(struct ieee80211_hw *hw,
u32 action, u32 rate_type, struct mwl8k_rate_table *rate_table)
{
struct mwl8k_cmd_use_fixed_rate *cmd;
int count;
int rc;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
cmd->header.length = cpu_to_le16(sizeof(*cmd));
cmd->action = cpu_to_le32(action);
cmd->rate_type = cpu_to_le32(rate_type);
if (rate_table != NULL) {
/* Copy over each field manually so
* that bitflipping can be done
*/
cmd->rate_table.allow_rate_drop =
cpu_to_le32(rate_table->allow_rate_drop);
cmd->rate_table.num_rates =
cpu_to_le32(rate_table->num_rates);
for (count = 0; count < rate_table->num_rates; count++) {
struct mwl8k_rate_entry *dst =
&cmd->rate_table.rate_entry[count];
struct mwl8k_rate_entry *src =
&rate_table->rate_entry[count];
dst->is_ht_rate = cpu_to_le32(src->is_ht_rate);
dst->enable_retry = cpu_to_le32(src->enable_retry);
dst->rate = cpu_to_le32(src->rate);
dst->retry_count = cpu_to_le32(src->retry_count);
}
}
rc = mwl8k_post_cmd(hw, &cmd->header);
kfree(cmd);
return rc;
}
/*
* Interrupt handling.
*/
static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
{
struct ieee80211_hw *hw = dev_id;
struct mwl8k_priv *priv = hw->priv;
u32 status;
status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
if (!status)
return IRQ_NONE;
if (status & MWL8K_A2H_INT_TX_DONE)
tasklet_schedule(&priv->tx_reclaim_task);
if (status & MWL8K_A2H_INT_RX_READY) {
while (rxq_process(hw, 0, 1))
rxq_refill(hw, 0, 1);
}
if (status & MWL8K_A2H_INT_OPC_DONE) {
if (priv->hostcmd_wait != NULL) {
complete(priv->hostcmd_wait);
priv->hostcmd_wait = NULL;
}
}
if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
if (!priv->inconfig &&
priv->radio_on &&
mwl8k_txq_busy(priv))
mwl8k_tx_start(priv);
}
return IRQ_HANDLED;
}
/*
* Core driver operations.
*/
static int mwl8k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct mwl8k_priv *priv = hw->priv;
int index = skb_get_queue_mapping(skb);
int rc;
if (priv->current_channel == NULL) {
printk(KERN_DEBUG "%s: dropped TX frame since radio "
"disabled\n", priv->name);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
rc = mwl8k_txq_xmit(hw, index, skb);
return rc;
}
struct mwl8k_work_struct {
/* Initialized by mwl8k_queue_work(). */
struct work_struct wt;
/* Required field passed in to mwl8k_queue_work(). */
struct ieee80211_hw *hw;
/* Required field passed in to mwl8k_queue_work(). */
int (*wfunc)(struct work_struct *w);
/* Initialized by mwl8k_queue_work(). */
struct completion *cmd_wait;
/* Result code. */
int rc;
/*
* Optional field. Refer to explanation of MWL8K_WQ_XXX_XXX
* flags for explanation. Defaults to MWL8K_WQ_DEFAULT_OPTIONS.
*/
u32 options;
/* Optional field. Defaults to MWL8K_CONFIG_TIMEOUT_MS. */
unsigned long timeout_ms;
/* Optional field. Defaults to MWL8K_WQ_TXWAIT_ATTEMPTS. */
u32 txwait_attempts;
/* Optional field. Defaults to MWL8K_TXWAIT_MS. */
u32 tx_timeout_ms;
u32 step;
};
/* Flags controlling behavior of config queue requests */
/* Caller spins while waiting for completion. */
#define MWL8K_WQ_SPIN 0x00000001
/* Wait for TX queues to empty before proceeding with configuration. */
#define MWL8K_WQ_TX_WAIT_EMPTY 0x00000002
/* Queue request and return immediately. */
#define MWL8K_WQ_POST_REQUEST 0x00000004
/*
* Caller sleeps and waits for task complete notification.
* Do not use in atomic context.
*/
#define MWL8K_WQ_SLEEP 0x00000008
/* Free work struct when task is done. */
#define MWL8K_WQ_FREE_WORKSTRUCT 0x00000010
/*
* Config request is queued and returns to caller imediately. Use
* this in atomic context. Work struct is freed by mwl8k_queue_work()
* when this flag is set.
*/
#define MWL8K_WQ_QUEUE_ONLY (MWL8K_WQ_POST_REQUEST | \
MWL8K_WQ_FREE_WORKSTRUCT)
/* Default work queue behavior is to sleep and wait for tx completion. */
#define MWL8K_WQ_DEFAULT_OPTIONS (MWL8K_WQ_SLEEP | MWL8K_WQ_TX_WAIT_EMPTY)
/*
* Default config request timeout. Add adjustments to make sure the
* config thread waits long enough for both tx wait and cmd wait before
* timing out.
*/
/* Time to wait for all TXQs to drain. TX Doorbell is pressed each time. */
#define MWL8K_TXWAIT_TIMEOUT_MS 1000
/* Default number of TX wait attempts. */
#define MWL8K_WQ_TXWAIT_ATTEMPTS 4
/* Total time to wait for TXQ to drain. */
#define MWL8K_TXWAIT_MS (MWL8K_TXWAIT_TIMEOUT_MS * \
MWL8K_WQ_TXWAIT_ATTEMPTS)
/* Scheduling slop. */
#define MWL8K_OS_SCHEDULE_OVERHEAD_MS 200
#define MWL8K_CONFIG_TIMEOUT_MS (MWL8K_CMD_TIMEOUT_MS + \
MWL8K_TXWAIT_MS + \
MWL8K_OS_SCHEDULE_OVERHEAD_MS)
static void mwl8k_config_thread(struct work_struct *wt)
{
struct mwl8k_work_struct *worker = (struct mwl8k_work_struct *)wt;
struct ieee80211_hw *hw = worker->hw;
struct mwl8k_priv *priv = hw->priv;
int rc = 0;
spin_lock_irq(&priv->tx_lock);
priv->inconfig = true;
spin_unlock_irq(&priv->tx_lock);
ieee80211_stop_queues(hw);
/*
* Wait for host queues to drain before doing PHY
* reconfiguration. This avoids interrupting any in-flight
* DMA transfers to the hardware.
*/
if (worker->options & MWL8K_WQ_TX_WAIT_EMPTY) {
u32 timeout;
u32 time_remaining;
u32 iter;
u32 tx_wait_attempts = worker->txwait_attempts;
time_remaining = worker->tx_timeout_ms;
if (!tx_wait_attempts)
tx_wait_attempts = 1;
timeout = worker->tx_timeout_ms/tx_wait_attempts;
if (!timeout)
timeout = 1;
iter = tx_wait_attempts;
do {
int wait_time;
if (time_remaining > timeout) {
time_remaining -= timeout;
wait_time = timeout;
} else
wait_time = time_remaining;
if (!wait_time)
wait_time = 1;
rc = mwl8k_tx_wait_empty(hw, wait_time);
if (rc)
printk(KERN_ERR "%s() txwait timeout=%ums "
"Retry:%u/%u\n", __func__, timeout,
tx_wait_attempts - iter + 1,
tx_wait_attempts);
} while (rc && --iter);
rc = iter ? 0 : -ETIMEDOUT;
}
if (!rc)
rc = worker->wfunc(wt);
spin_lock_irq(&priv->tx_lock);
priv->inconfig = false;
if (priv->pending_tx_pkts && priv->radio_on)
mwl8k_tx_start(priv);
spin_unlock_irq(&priv->tx_lock);
ieee80211_wake_queues(hw);
worker->rc = rc;
if (worker->options & MWL8K_WQ_SLEEP)
complete(worker->cmd_wait);
if (worker->options & MWL8K_WQ_FREE_WORKSTRUCT)
kfree(wt);
}
static int mwl8k_queue_work(struct ieee80211_hw *hw,
struct mwl8k_work_struct *worker,
struct workqueue_struct *wqueue,
int (*wfunc)(struct work_struct *w))
{
unsigned long timeout = 0;
int rc = 0;
DECLARE_COMPLETION_ONSTACK(cmd_wait);
if (!worker->timeout_ms)
worker->timeout_ms = MWL8K_CONFIG_TIMEOUT_MS;
if (!worker->options)
worker->options = MWL8K_WQ_DEFAULT_OPTIONS;
if (!worker->txwait_attempts)
worker->txwait_attempts = MWL8K_WQ_TXWAIT_ATTEMPTS;
if (!worker->tx_timeout_ms)
worker->tx_timeout_ms = MWL8K_TXWAIT_MS;
worker->hw = hw;
worker->cmd_wait = &cmd_wait;
worker->rc = 1;
worker->wfunc = wfunc;
INIT_WORK(&worker->wt, mwl8k_config_thread);
queue_work(wqueue, &worker->wt);
if (worker->options & MWL8K_WQ_POST_REQUEST) {
rc = 0;
} else {
if (worker->options & MWL8K_WQ_SPIN) {
timeout = worker->timeout_ms;
while (timeout && (worker->rc > 0)) {
mdelay(1);
timeout--;
}
} else if (worker->options & MWL8K_WQ_SLEEP)
timeout = wait_for_completion_timeout(&cmd_wait,
msecs_to_jiffies(worker->timeout_ms));
if (timeout)
rc = worker->rc;
else {
cancel_work_sync(&worker->wt);
rc = -ETIMEDOUT;
}
}
return rc;
}
struct mwl8k_start_worker {
struct mwl8k_work_struct header;
};
static int mwl8k_start_wt(struct work_struct *wt)
{
struct mwl8k_start_worker *worker = (struct mwl8k_start_worker *)wt;
struct ieee80211_hw *hw = worker->header.hw;
struct mwl8k_priv *priv = hw->priv;
int rc = 0;
if (priv->vif != NULL) {
rc = -EIO;
goto mwl8k_start_exit;
}
/* Turn on radio */
if (mwl8k_cmd_802_11_radio_enable(hw)) {
rc = -EIO;
goto mwl8k_start_exit;
}
/* Purge TX/RX HW queues */
if (mwl8k_cmd_set_pre_scan(hw)) {
rc = -EIO;
goto mwl8k_start_exit;
}
if (mwl8k_cmd_set_post_scan(hw, "\x00\x00\x00\x00\x00\x00")) {
rc = -EIO;
goto mwl8k_start_exit;
}
/* Enable firmware rate adaptation */
if (mwl8k_cmd_setrateadaptmode(hw, 0)) {
rc = -EIO;
goto mwl8k_start_exit;
}
/* Disable WMM. WMM gets enabled when stack sends WMM parms */
if (mwl8k_set_wmm(hw, 0)) {
rc = -EIO;
goto mwl8k_start_exit;
}
/* Disable sniffer mode */
if (mwl8k_enable_sniffer(hw, 0))
rc = -EIO;
mwl8k_start_exit:
return rc;
}
static int mwl8k_start(struct ieee80211_hw *hw)
{
struct mwl8k_start_worker *worker;
struct mwl8k_priv *priv = hw->priv;
int rc;
/* Enable tx reclaim tasklet */
tasklet_enable(&priv->tx_reclaim_task);
rc = request_irq(priv->pdev->irq, &mwl8k_interrupt,
IRQF_SHARED, MWL8K_NAME, hw);
if (rc) {
printk(KERN_ERR "%s: failed to register IRQ handler\n",
priv->name);
rc = -EIO;
goto mwl8k_start_disable_tasklet;
}
/* Enable interrupts */
iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL) {
rc = -ENOMEM;
goto mwl8k_start_disable_irq;
}
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_start_wt);
kfree(worker);
if (!rc)
return rc;
if (rc == -ETIMEDOUT)
printk(KERN_ERR "%s() timed out\n", __func__);
rc = -EIO;
mwl8k_start_disable_irq:
spin_lock_irq(&priv->tx_lock);
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
spin_unlock_irq(&priv->tx_lock);
free_irq(priv->pdev->irq, hw);
mwl8k_start_disable_tasklet:
tasklet_disable(&priv->tx_reclaim_task);
return rc;
}
struct mwl8k_stop_worker {
struct mwl8k_work_struct header;
};
static int mwl8k_stop_wt(struct work_struct *wt)
{
struct mwl8k_stop_worker *worker = (struct mwl8k_stop_worker *)wt;
struct ieee80211_hw *hw = worker->header.hw;
return mwl8k_cmd_802_11_radio_disable(hw);
}
static void mwl8k_stop(struct ieee80211_hw *hw)
{
int rc;
struct mwl8k_stop_worker *worker;
struct mwl8k_priv *priv = hw->priv;
int i;
if (priv->vif != NULL)
return;
ieee80211_stop_queues(hw);
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
return;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_stop_wt);
kfree(worker);
if (rc == -ETIMEDOUT)
printk(KERN_ERR "%s() timed out\n", __func__);
/* Disable interrupts */
spin_lock_irq(&priv->tx_lock);
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
spin_unlock_irq(&priv->tx_lock);
free_irq(priv->pdev->irq, hw);
/* Stop finalize join worker */
cancel_work_sync(&priv->finalize_join_worker);
if (priv->beacon_skb != NULL)
dev_kfree_skb(priv->beacon_skb);
/* Stop tx reclaim tasklet */
tasklet_disable(&priv->tx_reclaim_task);
/* Stop config thread */
flush_workqueue(priv->config_wq);
/* Return all skbs to mac80211 */
for (i = 0; i < MWL8K_TX_QUEUES; i++)
mwl8k_txq_reclaim(hw, i, 1);
}
static int mwl8k_add_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_vif *mwl8k_vif;
/*
* We only support one active interface at a time.
*/
if (priv->vif != NULL)
return -EBUSY;
/*
* We only support managed interfaces for now.
*/
if (conf->type != NL80211_IFTYPE_STATION)
return -EINVAL;
/* Clean out driver private area */
mwl8k_vif = MWL8K_VIF(conf->vif);
memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
/* Save the mac address */
memcpy(mwl8k_vif->mac_addr, conf->mac_addr, ETH_ALEN);
/* Back pointer to parent config block */
mwl8k_vif->priv = priv;
/* Setup initial PHY parameters */
memcpy(mwl8k_vif->legacy_rates,
priv->rates, sizeof(mwl8k_vif->legacy_rates));
mwl8k_vif->legacy_nrates = ARRAY_SIZE(priv->rates);
/* Set Initial sequence number to zero */
mwl8k_vif->seqno = 0;
priv->vif = conf->vif;
priv->current_channel = NULL;
return 0;
}
static void mwl8k_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct mwl8k_priv *priv = hw->priv;
if (priv->vif == NULL)
return;
priv->vif = NULL;
}
struct mwl8k_config_worker {
struct mwl8k_work_struct header;
u32 changed;
};
static int mwl8k_config_wt(struct work_struct *wt)
{
struct mwl8k_config_worker *worker =
(struct mwl8k_config_worker *)wt;
struct ieee80211_hw *hw = worker->header.hw;
struct ieee80211_conf *conf = &hw->conf;
struct mwl8k_priv *priv = hw->priv;
int rc = 0;
if (mwl8k_cmd_802_11_radio_enable(hw)) {
rc = -EINVAL;
goto mwl8k_config_exit;
}
priv->current_channel = conf->channel;
if (mwl8k_cmd_set_rf_channel(hw, conf->channel)) {
rc = -EINVAL;
goto mwl8k_config_exit;
}
if (conf->power_level > 18)
conf->power_level = 18;
if (mwl8k_cmd_802_11_rf_tx_power(hw, conf->power_level)) {
rc = -EINVAL;
goto mwl8k_config_exit;
}
if (mwl8k_cmd_mimo_config(hw, 0x7, 0x7))
rc = -EINVAL;
mwl8k_config_exit:
return rc;
}
static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
{
int rc = 0;
struct mwl8k_config_worker *worker;
struct mwl8k_priv *priv = hw->priv;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
return -ENOMEM;
worker->changed = changed;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_config_wt);
if (rc == -ETIMEDOUT) {
printk(KERN_ERR "%s() timed out.\n", __func__);
rc = -EINVAL;
}
kfree(worker);
/*
* mac80211 will crash on anything other than -EINVAL on
* error. Looks like wireless extensions which calls mac80211
* may be the actual culprit...
*/
return rc ? -EINVAL : 0;
}
struct mwl8k_bss_info_changed_worker {
struct mwl8k_work_struct header;
struct ieee80211_vif *vif;
struct ieee80211_bss_conf *info;
u32 changed;
};
static int mwl8k_bss_info_changed_wt(struct work_struct *wt)
{
struct mwl8k_bss_info_changed_worker *worker =
(struct mwl8k_bss_info_changed_worker *)wt;
struct ieee80211_hw *hw = worker->header.hw;
struct ieee80211_vif *vif = worker->vif;
struct ieee80211_bss_conf *info = worker->info;
u32 changed;
int rc;
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
changed = worker->changed;
priv->capture_beacon = false;
if (info->assoc) {
memcpy(&mwl8k_vif->bss_info, info,
sizeof(struct ieee80211_bss_conf));
/* Install rates */
if (mwl8k_update_rateset(hw, vif))
goto mwl8k_bss_info_changed_exit;
/* Turn on rate adaptation */
if (mwl8k_cmd_use_fixed_rate(hw, MWL8K_USE_AUTO_RATE,
MWL8K_UCAST_RATE, NULL))
goto mwl8k_bss_info_changed_exit;
/* Set radio preamble */
if (mwl8k_set_radio_preamble(hw, info->use_short_preamble))
goto mwl8k_bss_info_changed_exit;
/* Set slot time */
if (mwl8k_cmd_set_slot(hw, info->use_short_slot))
goto mwl8k_bss_info_changed_exit;
/* Update peer rate info */
if (mwl8k_cmd_update_sta_db(hw, vif,
MWL8K_STA_DB_MODIFY_ENTRY))
goto mwl8k_bss_info_changed_exit;
/* Set AID */
if (mwl8k_cmd_set_aid(hw, vif))
goto mwl8k_bss_info_changed_exit;
/*
* Finalize the join. Tell rx handler to process
* next beacon from our BSSID.
*/
memcpy(priv->capture_bssid, mwl8k_vif->bssid, ETH_ALEN);
priv->capture_beacon = true;
} else {
mwl8k_cmd_update_sta_db(hw, vif, MWL8K_STA_DB_DEL_ENTRY);
memset(&mwl8k_vif->bss_info, 0,
sizeof(struct ieee80211_bss_conf));
memset(mwl8k_vif->bssid, 0, ETH_ALEN);
}
mwl8k_bss_info_changed_exit:
rc = 0;
return rc;
}
static void mwl8k_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *info,
u32 changed)
{
struct mwl8k_bss_info_changed_worker *worker;
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
int rc;
if (changed & BSS_CHANGED_BSSID)
memcpy(mv_vif->bssid, info->bssid, ETH_ALEN);
if ((changed & BSS_CHANGED_ASSOC) == 0)
return;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
return;
worker->vif = vif;
worker->info = info;
worker->changed = changed;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq,
mwl8k_bss_info_changed_wt);
kfree(worker);
if (rc == -ETIMEDOUT)
printk(KERN_ERR "%s() timed out\n", __func__);
}
static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
int mc_count, struct dev_addr_list *mclist)
{
struct mwl8k_cmd_pkt *cmd;
cmd = __mwl8k_cmd_mac_multicast_adr(hw, mc_count, mclist);
return (unsigned long)cmd;
}
struct mwl8k_configure_filter_worker {
struct mwl8k_work_struct header;
unsigned int changed_flags;
unsigned int total_flags;
struct mwl8k_cmd_pkt *multicast_adr_cmd;
};
#define MWL8K_SUPPORTED_IF_FLAGS FIF_BCN_PRBRESP_PROMISC
static int mwl8k_configure_filter_wt(struct work_struct *wt)
{
struct mwl8k_configure_filter_worker *worker =
(struct mwl8k_configure_filter_worker *)wt;
struct ieee80211_hw *hw = worker->header.hw;
struct mwl8k_priv *priv = hw->priv;
int rc = 0;
if (worker->changed_flags & FIF_BCN_PRBRESP_PROMISC) {
if (worker->total_flags & FIF_BCN_PRBRESP_PROMISC)
rc = mwl8k_cmd_set_pre_scan(hw);
else {
u8 *bssid;
bssid = "\x00\x00\x00\x00\x00\x00";
if (priv->vif != NULL)
bssid = MWL8K_VIF(priv->vif)->bssid;
rc = mwl8k_cmd_set_post_scan(hw, bssid);
}
}
if (!rc && worker->multicast_adr_cmd != NULL)
rc = mwl8k_post_cmd(hw, worker->multicast_adr_cmd);
kfree(worker->multicast_adr_cmd);
return rc;
}
static void mwl8k_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
u64 multicast)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_configure_filter_worker *worker;
/* Clear unsupported feature flags */
*total_flags &= MWL8K_SUPPORTED_IF_FLAGS;
if (!(changed_flags & MWL8K_SUPPORTED_IF_FLAGS))
return;
worker = kzalloc(sizeof(*worker), GFP_ATOMIC);
if (worker == NULL)
return;
worker->changed_flags = changed_flags;
worker->total_flags = *total_flags;
worker->multicast_adr_cmd = (void *)(unsigned long)multicast;
mwl8k_queue_work(hw, &worker->header, priv->config_wq,
mwl8k_configure_filter_wt);
}
struct mwl8k_set_rts_threshold_worker {
struct mwl8k_work_struct header;
u32 value;
};
static int mwl8k_set_rts_threshold_wt(struct work_struct *wt)
{
struct mwl8k_set_rts_threshold_worker *worker =
(struct mwl8k_set_rts_threshold_worker *)wt;
struct ieee80211_hw *hw = worker->header.hw;
u16 threshold = (u16)(worker->value);
int rc;
rc = mwl8k_rts_threshold(hw, MWL8K_CMD_SET, &threshold);
return rc;
}
static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
int rc;
struct mwl8k_set_rts_threshold_worker *worker;
struct mwl8k_priv *priv = hw->priv;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
return -ENOMEM;
worker->value = value;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq,
mwl8k_set_rts_threshold_wt);
kfree(worker);
if (rc == -ETIMEDOUT) {
printk(KERN_ERR "%s() timed out\n", __func__);
rc = -EINVAL;
}
return rc;
}
struct mwl8k_conf_tx_worker {
struct mwl8k_work_struct header;
u16 queue;
const struct ieee80211_tx_queue_params *params;
};
static int mwl8k_conf_tx_wt(struct work_struct *wt)
{
struct mwl8k_conf_tx_worker *worker =
(struct mwl8k_conf_tx_worker *)wt;
struct ieee80211_hw *hw = worker->header.hw;
u16 queue = worker->queue;
const struct ieee80211_tx_queue_params *params = worker->params;
struct mwl8k_priv *priv = hw->priv;
int rc = 0;
if (!priv->wmm_enabled) {
if (mwl8k_set_wmm(hw, 1)) {
rc = -EINVAL;
goto mwl8k_conf_tx_exit;
}
}
if (mwl8k_set_edca_params(hw, GET_TXQ(queue), params->cw_min,
params->cw_max, params->aifs, params->txop))
rc = -EINVAL;
mwl8k_conf_tx_exit:
return rc;
}
static int mwl8k_conf_tx(struct ieee80211_hw *hw, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
int rc;
struct mwl8k_conf_tx_worker *worker;
struct mwl8k_priv *priv = hw->priv;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
return -ENOMEM;
worker->queue = queue;
worker->params = params;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_conf_tx_wt);
kfree(worker);
if (rc == -ETIMEDOUT) {
printk(KERN_ERR "%s() timed out\n", __func__);
rc = -EINVAL;
}
return rc;
}
static int mwl8k_get_tx_stats(struct ieee80211_hw *hw,
struct ieee80211_tx_queue_stats *stats)
{
struct mwl8k_priv *priv = hw->priv;
struct mwl8k_tx_queue *txq;
int index;
spin_lock_bh(&priv->tx_lock);
for (index = 0; index < MWL8K_TX_QUEUES; index++) {
txq = priv->txq + index;
memcpy(&stats[index], &txq->tx_stats,
sizeof(struct ieee80211_tx_queue_stats));
}
spin_unlock_bh(&priv->tx_lock);
return 0;
}
struct mwl8k_get_stats_worker {
struct mwl8k_work_struct header;
struct ieee80211_low_level_stats *stats;
};
static int mwl8k_get_stats_wt(struct work_struct *wt)
{
struct mwl8k_get_stats_worker *worker =
(struct mwl8k_get_stats_worker *)wt;
return mwl8k_cmd_802_11_get_stat(worker->header.hw, worker->stats);
}
static int mwl8k_get_stats(struct ieee80211_hw *hw,
struct ieee80211_low_level_stats *stats)
{
int rc;
struct mwl8k_get_stats_worker *worker;
struct mwl8k_priv *priv = hw->priv;
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
if (worker == NULL)
return -ENOMEM;
worker->stats = stats;
rc = mwl8k_queue_work(hw, &worker->header,
priv->config_wq, mwl8k_get_stats_wt);
kfree(worker);
if (rc == -ETIMEDOUT) {
printk(KERN_ERR "%s() timed out\n", __func__);
rc = -EINVAL;
}
return rc;
}
static const struct ieee80211_ops mwl8k_ops = {
.tx = mwl8k_tx,
.start = mwl8k_start,
.stop = mwl8k_stop,
.add_interface = mwl8k_add_interface,
.remove_interface = mwl8k_remove_interface,
.config = mwl8k_config,
.bss_info_changed = mwl8k_bss_info_changed,
.prepare_multicast = mwl8k_prepare_multicast,
.configure_filter = mwl8k_configure_filter,
.set_rts_threshold = mwl8k_set_rts_threshold,
.conf_tx = mwl8k_conf_tx,
.get_tx_stats = mwl8k_get_tx_stats,
.get_stats = mwl8k_get_stats,
};
static void mwl8k_tx_reclaim_handler(unsigned long data)
{
int i;
struct ieee80211_hw *hw = (struct ieee80211_hw *) data;
struct mwl8k_priv *priv = hw->priv;
spin_lock_bh(&priv->tx_lock);
for (i = 0; i < MWL8K_TX_QUEUES; i++)
mwl8k_txq_reclaim(hw, i, 0);
if (priv->tx_wait != NULL && mwl8k_txq_busy(priv) == 0) {
complete(priv->tx_wait);
priv->tx_wait = NULL;
}
spin_unlock_bh(&priv->tx_lock);
}
static void mwl8k_finalize_join_worker(struct work_struct *work)
{
struct mwl8k_priv *priv =
container_of(work, struct mwl8k_priv, finalize_join_worker);
struct sk_buff *skb = priv->beacon_skb;
u8 dtim = MWL8K_VIF(priv->vif)->bss_info.dtim_period;
mwl8k_finalize_join(priv->hw, skb->data, skb->len, dtim);
dev_kfree_skb(skb);
priv->beacon_skb = NULL;
}
static int __devinit mwl8k_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct ieee80211_hw *hw;
struct mwl8k_priv *priv;
int rc;
int i;
u8 *fw;
rc = pci_enable_device(pdev);
if (rc) {
printk(KERN_ERR "%s: Cannot enable new PCI device\n",
MWL8K_NAME);
return rc;
}
rc = pci_request_regions(pdev, MWL8K_NAME);
if (rc) {
printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
MWL8K_NAME);
return rc;
}
pci_set_master(pdev);
hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
if (hw == NULL) {
printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
rc = -ENOMEM;
goto err_free_reg;
}
priv = hw->priv;
priv->hw = hw;
priv->pdev = pdev;
priv->hostcmd_wait = NULL;
priv->tx_wait = NULL;
priv->inconfig = false;
priv->wmm_enabled = false;
priv->pending_tx_pkts = 0;
strncpy(priv->name, MWL8K_NAME, sizeof(priv->name));
spin_lock_init(&priv->fw_lock);
SET_IEEE80211_DEV(hw, &pdev->dev);
pci_set_drvdata(pdev, hw);
priv->regs = pci_iomap(pdev, 1, 0x10000);
if (priv->regs == NULL) {
printk(KERN_ERR "%s: Cannot map device memory\n", priv->name);
goto err_iounmap;
}
memcpy(priv->channels, mwl8k_channels, sizeof(mwl8k_channels));
priv->band.band = IEEE80211_BAND_2GHZ;
priv->band.channels = priv->channels;
priv->band.n_channels = ARRAY_SIZE(mwl8k_channels);
priv->band.bitrates = priv->rates;
priv->band.n_bitrates = ARRAY_SIZE(mwl8k_rates);
hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
BUILD_BUG_ON(sizeof(priv->rates) != sizeof(mwl8k_rates));
memcpy(priv->rates, mwl8k_rates, sizeof(mwl8k_rates));
/*
* Extra headroom is the size of the required DMA header
* minus the size of the smallest 802.11 frame (CTS frame).
*/
hw->extra_tx_headroom =
sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
hw->channel_change_time = 10;
hw->queues = MWL8K_TX_QUEUES;
hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
/* Set rssi and noise values to dBm */
hw->flags |= IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM;
hw->vif_data_size = sizeof(struct mwl8k_vif);
priv->vif = NULL;
/* Set default radio state and preamble */
priv->radio_on = 0;
priv->radio_short_preamble = 0;
/* Finalize join worker */
INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
/* TX reclaim tasklet */
tasklet_init(&priv->tx_reclaim_task,
mwl8k_tx_reclaim_handler, (unsigned long)hw);
tasklet_disable(&priv->tx_reclaim_task);
/* Config workthread */
priv->config_wq = create_singlethread_workqueue("mwl8k_config");
if (priv->config_wq == NULL)
goto err_iounmap;
/* Power management cookie */
priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
if (priv->cookie == NULL)
goto err_iounmap;
rc = mwl8k_rxq_init(hw, 0);
if (rc)
goto err_iounmap;
rxq_refill(hw, 0, INT_MAX);
spin_lock_init(&priv->tx_lock);
for (i = 0; i < MWL8K_TX_QUEUES; i++) {
rc = mwl8k_txq_init(hw, i);
if (rc)
goto err_free_queues;
}
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
iowrite32(0xffffffff, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
rc = request_irq(priv->pdev->irq, &mwl8k_interrupt,
IRQF_SHARED, MWL8K_NAME, hw);
if (rc) {
printk(KERN_ERR "%s: failed to register IRQ handler\n",
priv->name);
goto err_free_queues;
}
/* Reset firmware and hardware */
mwl8k_hw_reset(priv);
/* Ask userland hotplug daemon for the device firmware */
rc = mwl8k_request_firmware(priv, (u32)id->driver_data);
if (rc) {
printk(KERN_ERR "%s: Firmware files not found\n", priv->name);
goto err_free_irq;
}
/* Load firmware into hardware */
rc = mwl8k_load_firmware(priv);
if (rc) {
printk(KERN_ERR "%s: Cannot start firmware\n", priv->name);
goto err_stop_firmware;
}
/* Reclaim memory once firmware is successfully loaded */
mwl8k_release_firmware(priv);
/*
* Temporarily enable interrupts. Initial firmware host
* commands use interrupts and avoids polling. Disable
* interrupts when done.
*/
iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
/* Get config data, mac addrs etc */
rc = mwl8k_cmd_get_hw_spec(hw);
if (rc) {
printk(KERN_ERR "%s: Cannot initialise firmware\n", priv->name);
goto err_stop_firmware;
}
/* Turn radio off */
rc = mwl8k_cmd_802_11_radio_disable(hw);
if (rc) {
printk(KERN_ERR "%s: Cannot disable\n", priv->name);
goto err_stop_firmware;
}
/* Disable interrupts */
spin_lock_irq(&priv->tx_lock);
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
spin_unlock_irq(&priv->tx_lock);
free_irq(priv->pdev->irq, hw);
rc = ieee80211_register_hw(hw);
if (rc) {
printk(KERN_ERR "%s: Cannot register device\n", priv->name);
goto err_stop_firmware;
}
fw = (u8 *)&priv->fw_rev;
printk(KERN_INFO "%s: 88W%u %s\n", priv->name, priv->part_num,
MWL8K_DESC);
printk(KERN_INFO "%s: Driver Ver:%s Firmware Ver:%u.%u.%u.%u\n",
priv->name, MWL8K_VERSION, fw[3], fw[2], fw[1], fw[0]);
printk(KERN_INFO "%s: MAC Address: %pM\n", priv->name,
hw->wiphy->perm_addr);
return 0;
err_stop_firmware:
mwl8k_hw_reset(priv);
mwl8k_release_firmware(priv);
err_free_irq:
spin_lock_irq(&priv->tx_lock);
iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
spin_unlock_irq(&priv->tx_lock);
free_irq(priv->pdev->irq, hw);
err_free_queues:
for (i = 0; i < MWL8K_TX_QUEUES; i++)
mwl8k_txq_deinit(hw, i);
mwl8k_rxq_deinit(hw, 0);
err_iounmap:
if (priv->cookie != NULL)
pci_free_consistent(priv->pdev, 4,
priv->cookie, priv->cookie_dma);
if (priv->regs != NULL)
pci_iounmap(pdev, priv->regs);
if (priv->config_wq != NULL)
destroy_workqueue(priv->config_wq);
pci_set_drvdata(pdev, NULL);
ieee80211_free_hw(hw);
err_free_reg:
pci_release_regions(pdev);
pci_disable_device(pdev);
return rc;
}
static void __devexit mwl8k_shutdown(struct pci_dev *pdev)
{
printk(KERN_ERR "===>%s(%u)\n", __func__, __LINE__);
}
static void __devexit mwl8k_remove(struct pci_dev *pdev)
{
struct ieee80211_hw *hw = pci_get_drvdata(pdev);
struct mwl8k_priv *priv;
int i;
if (hw == NULL)
return;
priv = hw->priv;
ieee80211_stop_queues(hw);
ieee80211_unregister_hw(hw);
/* Remove tx reclaim tasklet */
tasklet_kill(&priv->tx_reclaim_task);
/* Stop config thread */
destroy_workqueue(priv->config_wq);
/* Stop hardware */
mwl8k_hw_reset(priv);
/* Return all skbs to mac80211 */
for (i = 0; i < MWL8K_TX_QUEUES; i++)
mwl8k_txq_reclaim(hw, i, 1);
for (i = 0; i < MWL8K_TX_QUEUES; i++)
mwl8k_txq_deinit(hw, i);
mwl8k_rxq_deinit(hw, 0);
pci_free_consistent(priv->pdev, 4,
priv->cookie, priv->cookie_dma);
pci_iounmap(pdev, priv->regs);
pci_set_drvdata(pdev, NULL);
ieee80211_free_hw(hw);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
static struct pci_driver mwl8k_driver = {
.name = MWL8K_NAME,
.id_table = mwl8k_table,
.probe = mwl8k_probe,
.remove = __devexit_p(mwl8k_remove),
.shutdown = __devexit_p(mwl8k_shutdown),
};
static int __init mwl8k_init(void)
{
return pci_register_driver(&mwl8k_driver);
}
static void __exit mwl8k_exit(void)
{
pci_unregister_driver(&mwl8k_driver);
}
module_init(mwl8k_init);
module_exit(mwl8k_exit);
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