redonkable/alistair23-linux
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libertas: convert libertas driver to use an event/cmdresp queue

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This patch (co-developed by Dan Williams and Holger Schurig) uses a kfifo
object for events and a swapping buffer scheme for the command response to
preserve the zero-copy semantics of the CF driver and keep memory usage low.
The main thread should only ever touch the buffer indexed by priv->resp_idx,
while the interface code is free to write to the second buffer, then swap
priv->resp_idx under the driver spinlock.  The firmware specs only permit
one in-flight command, so there will only ever be one command response to
process at a time.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Holger Schurig 2008-04-01 14:50:43 +02:00 committed by John W. Linville
parent 98dd6a5759
commit 7919b89c82
13 changed files with 270 additions and 384 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
drivers/net/wireless/libertas/cmd.c
View file

@ -4,6 +4,7 @@
*/
#include <net/iw_handler.h>
#include <linux/kfifo.h>
#include "host.h"
#include "hostcmd.h"
#include "decl.h"
@ -1829,15 +1830,20 @@ static void lbs_send_confirmsleep(struct lbs_private *priv)
ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
sizeof(confirm_sleep));
if (ret) {
lbs_pr_alert("confirm_sleep failed\n");
} else {
spin_lock_irqsave(&priv->driver_lock, flags);
if (!priv->intcounter)
priv->psstate = PS_STATE_SLEEP;
spin_unlock_irqrestore(&priv->driver_lock, flags);
goto out;
}
spin_lock_irqsave(&priv->driver_lock, flags);
/* If nothing to do, go back to sleep (?) */
if (!__kfifo_len(priv->event_fifo) && !priv->resp_len[priv->resp_idx])
priv->psstate = PS_STATE_SLEEP;
spin_unlock_irqrestore(&priv->driver_lock, flags);
out:
lbs_deb_leave(LBS_DEB_HOST);
}
@ -1899,13 +1905,16 @@ void lbs_ps_confirm_sleep(struct lbs_private *priv)
}
spin_lock_irqsave(&priv->driver_lock, flags);
/* In-progress command? */
if (priv->cur_cmd) {
allowed = 0;
lbs_deb_host("cur_cmd was set\n");
}
if (priv->intcounter > 0) {
/* Pending events or command responses? */
if (__kfifo_len(priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
allowed = 0;
lbs_deb_host("intcounter %d\n", priv->intcounter);
lbs_deb_host("pending events or command responses\n");
}
spin_unlock_irqrestore(&priv->driver_lock, flags);

23
drivers/net/wireless/libertas/cmdresp.c
View file

@ -384,7 +384,7 @@ static inline int handle_cmd_response(struct lbs_private *priv,
return ret;
}
int lbs_process_rx_command(struct lbs_private *priv)
int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
{
uint16_t respcmd, curcmd;
struct cmd_header *resp;
@ -404,14 +404,14 @@ int lbs_process_rx_command(struct lbs_private *priv)
goto done;
}
resp = (void *)priv->upld_buf;
resp = (void *)data;
curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
respcmd = le16_to_cpu(resp->command);
result = le16_to_cpu(resp->result);
lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
respcmd, le16_to_cpu(resp->seqnum), priv->upld_len);
lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, priv->upld_len);
respcmd, le16_to_cpu(resp->seqnum), len);
lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
lbs_pr_info("Received CMD_RESP with invalid sequence %d (expected %d)\n",
@ -569,18 +569,13 @@ static int lbs_send_confirmwake(struct lbs_private *priv)
return ret;
}
int lbs_process_event(struct lbs_private *priv)
int lbs_process_event(struct lbs_private *priv, u32 event)
{
int ret = 0;
u32 eventcause;
lbs_deb_enter(LBS_DEB_CMD);
spin_lock_irq(&priv->driver_lock);
eventcause = priv->eventcause >> SBI_EVENT_CAUSE_SHIFT;
spin_unlock_irq(&priv->driver_lock);
switch (eventcause) {
switch (event) {
case MACREG_INT_CODE_LINK_SENSED:
lbs_deb_cmd("EVENT: link sensed\n");
break;
@ -696,14 +691,10 @@ int lbs_process_event(struct lbs_private *priv)
break;
default:
lbs_pr_alert("EVENT: unknown event id %d\n", eventcause);
lbs_pr_alert("EVENT: unknown event id %d\n", event);
break;
}
spin_lock_irq(&priv->driver_lock);
priv->eventcause = 0;
spin_unlock_irq(&priv->driver_lock);
lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
return ret;
}

1
drivers/net/wireless/libertas/debugfs.c
View file

@ -824,7 +824,6 @@ struct debug_data {
/* To debug any member of struct lbs_private, simply add one line here.
*/
static struct debug_data items[] = {
{"intcounter", item_size(intcounter), item_addr(intcounter)},
{"psmode", item_size(psmode), item_addr(psmode)},
{"psstate", item_size(psstate), item_addr(psstate)},
};

10
drivers/net/wireless/libertas/decl.h
View file

@ -19,7 +19,7 @@ struct cmd_ds_command;
void lbs_set_mac_control(struct lbs_private *priv);
void lbs_send_tx_feedback(struct lbs_private *priv);
void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count);
int lbs_free_cmd_buffer(struct lbs_private *priv);
@ -30,14 +30,16 @@ int lbs_prepare_and_send_command(struct lbs_private *priv,
int lbs_allocate_cmd_buffer(struct lbs_private *priv);
int lbs_execute_next_command(struct lbs_private *priv);
int lbs_process_event(struct lbs_private *priv);
void lbs_interrupt(struct lbs_private *priv);
int lbs_process_event(struct lbs_private *priv, u32 event);
void lbs_queue_event(struct lbs_private *priv, u32 event);
void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx);
int lbs_set_radio_control(struct lbs_private *priv);
u32 lbs_fw_index_to_data_rate(u8 index);
u8 lbs_data_rate_to_fw_index(u32 rate);
/** The proc fs interface */
int lbs_process_rx_command(struct lbs_private *priv);
int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len);
void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
int result);
int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev);

2
drivers/net/wireless/libertas/defs.h
View file

@ -177,8 +177,6 @@ static inline void lbs_deb_hex(unsigned int grp, const char *prompt, u8 *buf, in
#define MRVDRV_CMD_UPLD_RDY 0x0008
#define MRVDRV_CARDEVENT 0x0010
#define SBI_EVENT_CAUSE_SHIFT 3
/** TxPD status */
/* Station firmware use TxPD status field to report final Tx transmit

27
drivers/net/wireless/libertas/dev.h
View file

@ -129,10 +129,6 @@ struct lbs_private {
u32 bbp_offset;
u32 rf_offset;
/** Upload length */
u32 upld_len;
/* Upload buffer */
u8 upld_buf[LBS_UPLD_SIZE];
/* Download sent:
bit0 1/0=data_sent/data_tx_done,
bit1 1/0=cmd_sent/cmd_tx_done,
@ -155,21 +151,16 @@ struct lbs_private {
/** Hardware access */
int (*hw_host_to_card) (struct lbs_private *priv, u8 type, u8 *payload, u16 nb);
int (*hw_get_int_status) (struct lbs_private *priv, u8 *);
int (*hw_read_event_cause) (struct lbs_private *);
/* Wake On LAN */
uint32_t wol_criteria;
uint8_t wol_gpio;
uint8_t wol_gap;
/* was struct lbs_adapter from here... */
/** Wlan adapter data structure*/
/** STATUS variables */
u32 fwrelease;
u32 fwcapinfo;
/* protected with big lock */
struct mutex lock;
@ -181,7 +172,6 @@ struct lbs_private {
/** command-related variables */
u16 seqnum;
/* protected by big lock */
struct cmd_ctrl_node *cmd_array;
/** Current command */
@ -194,12 +184,17 @@ struct lbs_private {
struct list_head cmdpendingq;
wait_queue_head_t cmd_pending;
/* command related variables protected by priv->driver_lock */
/** Async and Sync Event variables */
u32 intcounter;
u32 eventcause;
u8 nodename[16]; /* nickname */
/* Command responses sent from the hardware to the driver */
u8 resp_idx;
u8 resp_buf[2][LBS_UPLD_SIZE];
u32 resp_len[2];
/* Events sent from hardware to driver */
struct kfifo *event_fifo;
/* nickname */
u8 nodename[16];
/** spin locks */
spinlock_t driver_lock;
@ -209,8 +204,6 @@ struct lbs_private {
int nr_retries;
int cmd_timed_out;
u8 hisregcpy;
/** current ssid/bssid related parameters*/
struct current_bss_params curbssparams;

244
drivers/net/wireless/libertas/if_cs.c
View file

@ -83,14 +83,14 @@ static inline unsigned int if_cs_read8(struct if_cs_card *card, uint reg)
{
unsigned int val = ioread8(card->iobase + reg);
if (debug_output)
printk(KERN_INFO "##inb %08x<%02x\n", reg, val);
printk(KERN_INFO "inb %08x<%02x\n", reg, val);
return val;
}
static inline unsigned int if_cs_read16(struct if_cs_card *card, uint reg)
{
unsigned int val = ioread16(card->iobase + reg);
if (debug_output)
printk(KERN_INFO "##inw %08x<%04x\n", reg, val);
printk(KERN_INFO "inw %08x<%04x\n", reg, val);
return val;
}
static inline void if_cs_read16_rep(
@ -100,7 +100,7 @@ static inline void if_cs_read16_rep(
unsigned long count)
{
if (debug_output)
printk(KERN_INFO "##insw %08x<(0x%lx words)\n",
printk(KERN_INFO "insw %08x<(0x%lx words)\n",
reg, count);
ioread16_rep(card->iobase + reg, buf, count);
}
@ -108,14 +108,14 @@ static inline void if_cs_read16_rep(
static inline void if_cs_write8(struct if_cs_card *card, uint reg, u8 val)
{
if (debug_output)
printk(KERN_INFO "##outb %08x>%02x\n", reg, val);
printk(KERN_INFO "outb %08x>%02x\n", reg, val);
iowrite8(val, card->iobase + reg);
}
static inline void if_cs_write16(struct if_cs_card *card, uint reg, u16 val)
{
if (debug_output)
printk(KERN_INFO "##outw %08x>%04x\n", reg, val);
printk(KERN_INFO "outw %08x>%04x\n", reg, val);
iowrite16(val, card->iobase + reg);
}
@ -126,7 +126,7 @@ static inline void if_cs_write16_rep(
unsigned long count)
{
if (debug_output)
printk(KERN_INFO "##outsw %08x>(0x%lx words)\n",
printk(KERN_INFO "outsw %08x>(0x%lx words)\n",
reg, count);
iowrite16_rep(card->iobase + reg, buf, count);
}
@ -199,17 +199,6 @@ static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 r
#define IF_CS_C_S_CARDEVENT 0x0010
#define IF_CS_C_S_MASK 0x001f
#define IF_CS_C_S_STATUS_MASK 0x7f00
/* The following definitions should be the same as the MRVDRV_ ones */
#if MRVDRV_CMD_DNLD_RDY != IF_CS_C_S_CMD_DNLD_RDY
#error MRVDRV_CMD_DNLD_RDY and IF_CS_C_S_CMD_DNLD_RDY not in sync
#endif
#if MRVDRV_CMD_UPLD_RDY != IF_CS_C_S_CMD_UPLD_RDY
#error MRVDRV_CMD_UPLD_RDY and IF_CS_C_S_CMD_UPLD_RDY not in sync
#endif
#if MRVDRV_CARDEVENT != IF_CS_C_S_CARDEVENT
#error MRVDRV_CARDEVENT and IF_CS_C_S_CARDEVENT not in sync
#endif
#define IF_CS_C_INT_CAUSE 0x00000022
#define IF_CS_C_IC_MASK 0x001f
@ -225,55 +214,6 @@ static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 r
/********************************************************************/
/* Interrupts */
/********************************************************************/
static inline void if_cs_enable_ints(struct if_cs_card *card)
{
lbs_deb_enter(LBS_DEB_CS);
if_cs_write16(card, IF_CS_H_INT_MASK, 0);
}
static inline void if_cs_disable_ints(struct if_cs_card *card)
{
lbs_deb_enter(LBS_DEB_CS);
if_cs_write16(card, IF_CS_H_INT_MASK, IF_CS_H_IM_MASK);
}
static irqreturn_t if_cs_interrupt(int irq, void *data)
{
struct if_cs_card *card = data;
u16 int_cause;
lbs_deb_enter(LBS_DEB_CS);
int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE);
if (int_cause == 0x0) {
/* Not for us */
return IRQ_NONE;
} else if (int_cause == 0xffff) {
/* Read in junk, the card has probably been removed */
card->priv->surpriseremoved = 1;
return IRQ_HANDLED;
} else {
if (int_cause & IF_CS_H_IC_TX_OVER)
lbs_host_to_card_done(card->priv);
/* clear interrupt */
if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause & IF_CS_C_IC_MASK);
}
spin_lock(&card->priv->driver_lock);
lbs_interrupt(card->priv);
spin_unlock(&card->priv->driver_lock);
return IRQ_HANDLED;
}
/********************************************************************/
/* I/O */
/********************************************************************/
@ -351,6 +291,7 @@ static void if_cs_send_data(struct lbs_private *priv, u8 *buf, u16 nb)
*/
static int if_cs_receive_cmdres(struct lbs_private *priv, u8 *data, u32 *len)
{
unsigned long flags;
int ret = -1;
u16 val;
@ -378,6 +319,12 @@ static int if_cs_receive_cmdres(struct lbs_private *priv, u8 *data, u32 *len)
* bytes */
*len -= 8;
ret = 0;
/* Clear this flag again */
spin_lock_irqsave(&priv->driver_lock, flags);
priv->dnld_sent = DNLD_RES_RECEIVED;
spin_unlock_irqrestore(&priv->driver_lock, flags);
out:
lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len);
return ret;
@ -396,11 +343,9 @@ static struct sk_buff *if_cs_receive_data(struct lbs_private *priv)
if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
lbs_pr_err("card data buffer has invalid # of bytes (%d)\n", len);
priv->stats.rx_dropped++;
printk(KERN_INFO "##HS %s:%d TODO\n", __FUNCTION__, __LINE__);
goto dat_err;
}
//TODO: skb = dev_alloc_skb(len+ETH_FRAME_LEN+MRVDRV_SNAP_HEADER_LEN+EXTRA_LEN);
skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + 2);
if (!skb)
goto out;
@ -424,6 +369,96 @@ out:
/********************************************************************/
/* Interrupts */
/********************************************************************/
static inline void if_cs_enable_ints(struct if_cs_card *card)
{
lbs_deb_enter(LBS_DEB_CS);
if_cs_write16(card, IF_CS_H_INT_MASK, 0);
}
static inline void if_cs_disable_ints(struct if_cs_card *card)
{
lbs_deb_enter(LBS_DEB_CS);
if_cs_write16(card, IF_CS_H_INT_MASK, IF_CS_H_IM_MASK);
}
static irqreturn_t if_cs_interrupt(int irq, void *data)
{
struct if_cs_card *card = data;
struct lbs_private *priv = card->priv;
u16 cause;
lbs_deb_enter(LBS_DEB_CS);
cause = if_cs_read16(card, IF_CS_C_INT_CAUSE);
if_cs_write16(card, IF_CS_C_INT_CAUSE, cause & IF_CS_C_IC_MASK);
lbs_deb_cs("cause 0x%04x\n", cause);
if (cause == 0) {
/* Not for us */
return IRQ_NONE;
}
if (cause == 0xffff) {
/* Read in junk, the card has probably been removed */
card->priv->surpriseremoved = 1;
return IRQ_HANDLED;
}
/* TODO: I'm not sure what the best ordering is */
cause = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_S_MASK;
if (cause & IF_CS_C_S_RX_UPLD_RDY) {
struct sk_buff *skb;
lbs_deb_cs("rx packet\n");
skb = if_cs_receive_data(priv);
if (skb)
lbs_process_rxed_packet(priv, skb);
}
if (cause & IF_CS_H_IC_TX_OVER) {
lbs_deb_cs("tx over\n");
lbs_host_to_card_done(priv);
}
if (cause & IF_CS_C_S_CMD_UPLD_RDY) {
unsigned long flags;
u8 i;
lbs_deb_cs("cmd upload ready\n");
spin_lock_irqsave(&priv->driver_lock, flags);
i = (priv->resp_idx == 0) ? 1 : 0;
spin_unlock_irqrestore(&priv->driver_lock, flags);
BUG_ON(priv->resp_len[i]);
if_cs_receive_cmdres(priv, priv->resp_buf[i],
&priv->resp_len[i]);
spin_lock_irqsave(&priv->driver_lock, flags);
lbs_notify_command_response(priv, i);
spin_unlock_irqrestore(&priv->driver_lock, flags);
}
if (cause & IF_CS_H_IC_HOST_EVENT) {
u16 event = if_cs_read16(priv->card, IF_CS_C_STATUS)
& IF_CS_C_S_STATUS_MASK;
if_cs_write16(priv->card, IF_CS_H_INT_CAUSE,
IF_CS_H_IC_HOST_EVENT);
lbs_deb_cs("eventcause 0x%04x\n", event);
lbs_queue_event(priv, event >> 8 & 0xff);
}
return IRQ_HANDLED;
}
/********************************************************************/
/* Firmware */
/********************************************************************/
@ -476,8 +511,6 @@ static int if_cs_prog_helper(struct if_cs_card *card)
if (remain < count)
count = remain;
/* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
__LINE__, sent, fw->size); */
/* "write the number of bytes to be sent to the I/O Command
* write length register" */
@ -544,18 +577,12 @@ static int if_cs_prog_real(struct if_cs_card *card)
ret = if_cs_poll_while_fw_download(card, IF_CS_C_SQ_READ_LOW, IF_CS_C_SQ_HELPER_OK);
if (ret < 0) {
int i;
lbs_pr_err("helper firmware doesn't answer\n");
for (i = 0; i < 0x50; i += 2)
printk(KERN_INFO "## HS %02x: %04x\n",
i, if_cs_read16(card, i));
goto err_release;
}
for (sent = 0; sent < fw->size; sent += len) {
len = if_cs_read16(card, IF_CS_C_SQ_READ_LOW);
/* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
__LINE__, sent, fw->size); */
if (len & 1) {
retry++;
lbs_pr_info("odd, need to retry this firmware block\n");
@ -642,64 +669,6 @@ static int if_cs_host_to_card(struct lbs_private *priv,
}
static int if_cs_get_int_status(struct lbs_private *priv, u8 *ireg)
{
struct if_cs_card *card = (struct if_cs_card *)priv->card;
int ret = 0;
u16 int_cause;
*ireg = 0;
lbs_deb_enter(LBS_DEB_CS);
if (priv->surpriseremoved)
goto out;
int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE) & IF_CS_C_IC_MASK;
if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause);
*ireg = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_S_MASK;
if (!*ireg)
goto sbi_get_int_status_exit;
sbi_get_int_status_exit:
/* is there a data packet for us? */
if (*ireg & IF_CS_C_S_RX_UPLD_RDY) {
struct sk_buff *skb = if_cs_receive_data(priv);
lbs_process_rxed_packet(priv, skb);
*ireg &= ~IF_CS_C_S_RX_UPLD_RDY;
}
if (*ireg & IF_CS_C_S_TX_DNLD_RDY) {
priv->dnld_sent = DNLD_RES_RECEIVED;
}
/* Card has a command result for us */
if (*ireg & IF_CS_C_S_CMD_UPLD_RDY) {
ret = if_cs_receive_cmdres(priv, priv->upld_buf, &priv->upld_len);
if (ret < 0)
lbs_pr_err("could not receive cmd from card\n");
}
out:
lbs_deb_leave_args(LBS_DEB_CS, "ret %d, ireg 0x%x, hisregcpy 0x%x", ret, *ireg, priv->hisregcpy);
return ret;
}
static int if_cs_read_event_cause(struct lbs_private *priv)
{
lbs_deb_enter(LBS_DEB_CS);
priv->eventcause = (if_cs_read16(priv->card, IF_CS_C_STATUS) & IF_CS_C_S_STATUS_MASK) >> 5;
if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_HOST_EVENT);
return 0;
}
/********************************************************************/
/* Card Services */
/********************************************************************/
@ -852,13 +821,10 @@ static int if_cs_probe(struct pcmcia_device *p_dev)
goto out2;
}
/* Store pointers to our call-back functions */
/* Finish setting up fields in lbs_private */
card->priv = priv;
priv->card = card;
priv->hw_host_to_card = if_cs_host_to_card;
priv->hw_get_int_status = if_cs_get_int_status;
priv->hw_read_event_cause = if_cs_read_event_cause;
priv->hw_host_to_card = if_cs_host_to_card;
priv->fw_ready = 1;
/* Now actually get the IRQ */

65
drivers/net/wireless/libertas/if_sdio.c
View file

@ -91,8 +91,6 @@ struct if_sdio_card {
const char *firmware;
u8 buffer[65536];
u8 int_cause;
u32 event;
spinlock_t lock;
struct if_sdio_packet *packets;
@ -129,13 +127,13 @@ static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
static int if_sdio_handle_cmd(struct if_sdio_card *card,
u8 *buffer, unsigned size)
{
struct lbs_private *priv = card->priv;
int ret;
unsigned long flags;
u8 i;
lbs_deb_enter(LBS_DEB_SDIO);
spin_lock_irqsave(&card->priv->driver_lock, flags);
if (size > LBS_CMD_BUFFER_SIZE) {
lbs_deb_sdio("response packet too large (%d bytes)\n",
(int)size);
@ -143,20 +141,20 @@ static int if_sdio_handle_cmd(struct if_sdio_card *card,
goto out;
}
memcpy(card->priv->upld_buf, buffer, size);
card->priv->upld_len = size;
spin_lock_irqsave(&priv->driver_lock, flags);
card->int_cause |= MRVDRV_CMD_UPLD_RDY;
i = (priv->resp_idx == 0) ? 1 : 0;
BUG_ON(priv->resp_len[i]);
priv->resp_len[i] = size;
memcpy(priv->resp_buf[i], buffer, size);
lbs_notify_command_response(priv, i);
lbs_interrupt(card->priv);
spin_unlock_irqrestore(&card->priv->driver_lock, flags);
ret = 0;
out:
spin_unlock_irqrestore(&card->priv->driver_lock, flags);
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
}
@ -202,7 +200,6 @@ static int if_sdio_handle_event(struct if_sdio_card *card,
u8 *buffer, unsigned size)
{
int ret;
unsigned long flags;
u32 event;
lbs_deb_enter(LBS_DEB_SDIO);
@ -222,18 +219,9 @@ static int if_sdio_handle_event(struct if_sdio_card *card,
event |= buffer[2] << 16;
event |= buffer[1] << 8;
event |= buffer[0] << 0;
event <<= SBI_EVENT_CAUSE_SHIFT;
}
spin_lock_irqsave(&card->priv->driver_lock, flags);
card->event = event;
card->int_cause |= MRVDRV_CARDEVENT;
lbs_interrupt(card->priv);
spin_unlock_irqrestore(&card->priv->driver_lock, flags);
lbs_queue_event(card->priv, event & 0xFF);
ret = 0;
out:
@ -770,37 +758,6 @@ out:
return ret;
}
static int if_sdio_get_int_status(struct lbs_private *priv, u8 *ireg)
{
struct if_sdio_card *card;
lbs_deb_enter(LBS_DEB_SDIO);
card = priv->card;
*ireg = card->int_cause;
card->int_cause = 0;
lbs_deb_leave(LBS_DEB_SDIO);
return 0;
}
static int if_sdio_read_event_cause(struct lbs_private *priv)
{
struct if_sdio_card *card;
lbs_deb_enter(LBS_DEB_SDIO);
card = priv->card;
priv->eventcause = card->event;
lbs_deb_leave(LBS_DEB_SDIO);
return 0;
}
/*******************************************************************/
/* SDIO callbacks */
/*******************************************************************/
@ -953,8 +910,6 @@ static int if_sdio_probe(struct sdio_func *func,
priv->card = card;
priv->hw_host_to_card = if_sdio_host_to_card;
priv->hw_get_int_status = if_sdio_get_int_status;
priv->hw_read_event_cause = if_sdio_read_event_cause;
priv->fw_ready = 1;

73
drivers/net/wireless/libertas/if_usb.c
View file

@ -38,8 +38,6 @@ static void if_usb_receive_fwload(struct urb *urb);
static int if_usb_prog_firmware(struct if_usb_card *cardp);
static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
uint8_t *payload, uint16_t nb);
static int if_usb_get_int_status(struct lbs_private *priv, uint8_t *);
static int if_usb_read_event_cause(struct lbs_private *);
static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
uint16_t nb);
static void if_usb_free(struct if_usb_card *cardp);
@ -233,8 +231,6 @@ static int if_usb_probe(struct usb_interface *intf,
cardp->priv->fw_ready = 1;
priv->hw_host_to_card = if_usb_host_to_card;
priv->hw_get_int_status = if_usb_get_int_status;
priv->hw_read_event_cause = if_usb_read_event_cause;
cardp->boot2_version = udev->descriptor.bcdDevice;
if_usb_submit_rx_urb(cardp);
@ -582,7 +578,6 @@ static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
skb_pull(skb, MESSAGE_HEADER_LEN);
lbs_process_rxed_packet(priv, skb);
priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
}
static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
@ -590,6 +585,8 @@ static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
struct if_usb_card *cardp,
struct lbs_private *priv)
{
u8 i;
if (recvlength > LBS_CMD_BUFFER_SIZE) {
lbs_deb_usbd(&cardp->udev->dev,
"The receive buffer is too large\n");
@ -601,12 +598,15 @@ static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
BUG();
spin_lock(&priv->driver_lock);
cardp->usb_int_cause |= MRVDRV_CMD_UPLD_RDY;
priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
memcpy(priv->upld_buf, recvbuff + MESSAGE_HEADER_LEN, priv->upld_len);
i = (priv->resp_idx == 0) ? 1 : 0;
BUG_ON(priv->resp_len[i]);
priv->resp_len[i] = (recvlength - MESSAGE_HEADER_LEN);
memcpy(priv->resp_buf[i], recvbuff + MESSAGE_HEADER_LEN,
priv->resp_len[i]);
kfree_skb(skb);
lbs_interrupt(priv);
lbs_notify_command_response(priv, i);
spin_unlock(&priv->driver_lock);
lbs_deb_usbd(&cardp->udev->dev,
@ -629,6 +629,7 @@ static void if_usb_receive(struct urb *urb)
uint8_t *recvbuff = NULL;
uint32_t recvtype = 0;
__le32 *pkt = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
uint32_t event;
lbs_deb_enter(LBS_DEB_USB);
@ -660,26 +661,20 @@ static void if_usb_receive(struct urb *urb)
break;
case CMD_TYPE_INDICATION:
/* Event cause handling */
spin_lock(&priv->driver_lock);
cardp->usb_event_cause = le32_to_cpu(pkt[1]);
lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
cardp->usb_event_cause);
/* Event handling */
event = le32_to_cpu(pkt[1]);
lbs_deb_usbd(&cardp->udev->dev, "**EVENT** 0x%X\n", event);
kfree_skb(skb);
/* Icky undocumented magic special case */
if (cardp->usb_event_cause & 0xffff0000) {
lbs_send_tx_feedback(priv);
spin_unlock(&priv->driver_lock);
break;
}
cardp->usb_event_cause <<= 3;
cardp->usb_int_cause |= MRVDRV_CARDEVENT;
kfree_skb(skb);
lbs_interrupt(priv);
spin_unlock(&priv->driver_lock);
goto rx_exit;
if (event & 0xffff0000) {
u32 trycount = (event & 0xffff0000) >> 16;
lbs_send_tx_feedback(priv, trycount);
} else
lbs_queue_event(priv, event & 0xFF);
break;
default:
lbs_deb_usbd(&cardp->udev->dev, "Unknown command type 0x%X\n",
recvtype);
@ -722,30 +717,6 @@ static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN);
}
/* called with priv->driver_lock held */
static int if_usb_get_int_status(struct lbs_private *priv, uint8_t *ireg)
{
struct if_usb_card *cardp = priv->card;
*ireg = cardp->usb_int_cause;
cardp->usb_int_cause = 0;
lbs_deb_usbd(&cardp->udev->dev, "Int cause is 0x%X\n", *ireg);
return 0;
}
static int if_usb_read_event_cause(struct lbs_private *priv)
{
struct if_usb_card *cardp = priv->card;
priv->eventcause = cardp->usb_event_cause;
/* Re-submit rx urb here to avoid event lost issue */
if_usb_submit_rx_urb(cardp);
return 0;
}
/**
* @brief This function issues Boot command to the Boot2 code
* @param ivalue 1:Boot from FW by USB-Download

2
drivers/net/wireless/libertas/if_usb.h
View file

@ -46,8 +46,6 @@ struct if_usb_card {
struct lbs_private *priv;
struct sk_buff *rx_skb;
uint32_t usb_event_cause;
uint8_t usb_int_cause;
uint8_t ep_in;
uint8_t ep_out;

158
drivers/net/wireless/libertas/main.c
View file

@ -10,6 +10,7 @@
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/kthread.h>
#include <linux/kfifo.h>
#include <net/iw_handler.h>
#include <net/ieee80211.h>
@ -480,10 +481,9 @@ static void lbs_tx_timeout(struct net_device *dev)
dev->trans_start = jiffies;
if (priv->currenttxskb) {
priv->eventcause = 0x01000000;
lbs_send_tx_feedback(priv);
}
if (priv->currenttxskb)
lbs_send_tx_feedback(priv, 0);
/* XX: Shouldn't we also call into the hw-specific driver
to kick it somehow? */
lbs_host_to_card_done(priv);
@ -659,7 +659,6 @@ static int lbs_thread(void *data)
struct net_device *dev = data;
struct lbs_private *priv = dev->priv;
wait_queue_t wait;
u8 ireg = 0;
lbs_deb_enter(LBS_DEB_THREAD);
@ -667,9 +666,10 @@ static int lbs_thread(void *data)
for (;;) {
int shouldsleep;
u8 resp_idx;
lbs_deb_thread( "main-thread 111: intcounter=%d currenttxskb=%p dnld_sent=%d\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent);
lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
priv->currenttxskb, priv->dnld_sent);
add_wait_queue(&priv->waitq, &wait);
set_current_state(TASK_INTERRUPTIBLE);
@ -681,8 +681,6 @@ static int lbs_thread(void *data)
shouldsleep = 1; /* We need to wait until we're _told_ to die */
else if (priv->psstate == PS_STATE_SLEEP)
shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */
else if (priv->intcounter)
shouldsleep = 0; /* Interrupt pending. Deal with it now */
else if (priv->cmd_timed_out)
shouldsleep = 0; /* Command timed out. Recover */
else if (!priv->fw_ready)
@ -695,29 +693,34 @@ static int lbs_thread(void *data)
shouldsleep = 1; /* Can't send a command; one already running */
else if (!list_empty(&priv->cmdpendingq))
shouldsleep = 0; /* We have a command to send */
else if (__kfifo_len(priv->event_fifo))
shouldsleep = 0; /* We have an event to process */
else if (priv->resp_len[priv->resp_idx])
shouldsleep = 0; /* We have a command response */
else
shouldsleep = 1; /* No command */
if (shouldsleep) {
lbs_deb_thread("main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
priv->connect_status, priv->intcounter,
priv->psmode, priv->psstate);
lbs_deb_thread("sleeping, connect_status %d, "
"ps_mode %d, ps_state %d\n",
priv->connect_status,
priv->psmode, priv->psstate);
spin_unlock_irq(&priv->driver_lock);
schedule();
} else
spin_unlock_irq(&priv->driver_lock);
lbs_deb_thread("main-thread 222 (waking up): intcounter=%d currenttxskb=%p dnld_sent=%d\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent);
lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
priv->currenttxskb, priv->dnld_sent);
set_current_state(TASK_RUNNING);
remove_wait_queue(&priv->waitq, &wait);
lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p dnld_sent=%d\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent);
lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
priv->currenttxskb, priv->dnld_sent);
if (kthread_should_stop()) {
lbs_deb_thread("main-thread: break from main thread\n");
lbs_deb_thread("break from main thread\n");
break;
}
@ -726,35 +729,23 @@ static int lbs_thread(void *data)
continue;
}
lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
priv->currenttxskb, priv->dnld_sent);
spin_lock_irq(&priv->driver_lock);
if (priv->intcounter) {
u8 int_status;
priv->intcounter = 0;
int_status = priv->hw_get_int_status(priv, &ireg);
if (int_status) {
lbs_deb_thread("main-thread: reading HOST_INT_STATUS_REG failed\n");
spin_unlock_irq(&priv->driver_lock);
continue;
}
priv->hisregcpy |= ireg;
}
lbs_deb_thread("main-thread 444: intcounter=%d currenttxskb=%p dnld_sent=%d\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent);
/* command response? */
if (priv->hisregcpy & MRVDRV_CMD_UPLD_RDY) {
lbs_deb_thread("main-thread: cmd response ready\n");
priv->hisregcpy &= ~MRVDRV_CMD_UPLD_RDY;
/* Process any pending command response */
resp_idx = priv->resp_idx;
if (priv->resp_len[resp_idx]) {
spin_unlock_irq(&priv->driver_lock);
lbs_process_rx_command(priv);
lbs_process_command_response(priv,
priv->resp_buf[resp_idx],
priv->resp_len[resp_idx]);
spin_lock_irq(&priv->driver_lock);
priv->resp_len[resp_idx] = 0;
}
spin_unlock_irq(&priv->driver_lock);
/* command timeout stuff */
if (priv->cmd_timed_out && priv->cur_cmd) {
struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
@ -775,21 +766,18 @@ static int lbs_thread(void *data)
}
priv->cmd_timed_out = 0;
/* Any Card Event */
if (priv->hisregcpy & MRVDRV_CARDEVENT) {
lbs_deb_thread("main-thread: Card Event Activity\n");
/* Process hardware events, e.g. card removed, link lost */
spin_lock_irq(&priv->driver_lock);
while (__kfifo_len(priv->event_fifo)) {
u32 event;
priv->hisregcpy &= ~MRVDRV_CARDEVENT;
if (priv->hw_read_event_cause(priv)) {
lbs_pr_alert("main-thread: hw_read_event_cause failed\n");
spin_unlock_irq(&priv->driver_lock);
continue;
}
spin_unlock_irq(&priv->driver_lock);
lbs_process_event(priv);
} else
__kfifo_get(priv->event_fifo, (unsigned char *) &event,
sizeof(event));
spin_unlock_irq(&priv->driver_lock);
lbs_process_event(priv, event);
spin_lock_irq(&priv->driver_lock);
}
spin_unlock_irq(&priv->driver_lock);
if (!priv->fw_ready)
continue;
@ -798,8 +786,10 @@ static int lbs_thread(void *data)
if (priv->psstate == PS_STATE_PRE_SLEEP &&
!priv->dnld_sent && !priv->cur_cmd) {
if (priv->connect_status == LBS_CONNECTED) {
lbs_deb_thread("main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p dnld_sent=%d cur_cmd=%p, confirm now\n",
priv->intcounter, priv->currenttxskb, priv->dnld_sent, priv->cur_cmd);
lbs_deb_thread("pre-sleep, currenttxskb %p, "
"dnld_sent %d, cur_cmd %p\n",
priv->currenttxskb, priv->dnld_sent,
priv->cur_cmd);
lbs_ps_confirm_sleep(priv);
} else {
@ -809,7 +799,8 @@ static int lbs_thread(void *data)
* after firmware fixes it
*/
priv->psstate = PS_STATE_AWAKE;
lbs_pr_alert("main-thread: ignore PS_SleepConfirm in non-connected state\n");
lbs_pr_alert("ignore PS_SleepConfirm in "
"non-connected state\n");
}
}
@ -1046,7 +1037,18 @@ static int lbs_init_adapter(struct lbs_private *priv)
/* Allocate the command buffers */
if (lbs_allocate_cmd_buffer(priv)) {
lbs_pr_err("Out of memory allocating command buffers\n");
ret = -1;
ret = -ENOMEM;
goto out;
}
priv->resp_idx = 0;
priv->resp_len[0] = priv->resp_len[1] = 0;
/* Create the event FIFO */
priv->event_fifo = kfifo_alloc(sizeof(u32) * 16, GFP_KERNEL, NULL);
if (IS_ERR(priv->event_fifo)) {
lbs_pr_err("Out of memory allocating event FIFO buffer\n");
ret = -ENOMEM;
goto out;
}
out:
@ -1060,6 +1062,8 @@ static void lbs_free_adapter(struct lbs_private *priv)
lbs_deb_enter(LBS_DEB_MAIN);
lbs_free_cmd_buffer(priv);
if (priv->event_fifo)
kfifo_free(priv->event_fifo);
del_timer(&priv->command_timer);
kfree(priv->networks);
priv->networks = NULL;
@ -1434,27 +1438,41 @@ out:
return ret;
}
/**
* @brief This function handles the interrupt. it will change PS
* state if applicable. it will wake up main_thread to handle
* the interrupt event as well.
*
* @param dev A pointer to net_device structure
* @return n/a
*/
void lbs_interrupt(struct lbs_private *priv)
void lbs_queue_event(struct lbs_private *priv, u32 event)
{
unsigned long flags;
lbs_deb_enter(LBS_DEB_THREAD);
spin_lock_irqsave(&priv->driver_lock, flags);
if (priv->psstate == PS_STATE_SLEEP)
priv->psstate = PS_STATE_AWAKE;
__kfifo_put(priv->event_fifo, (unsigned char *) &event, sizeof(u32));
wake_up_interruptible(&priv->waitq);
spin_unlock_irqrestore(&priv->driver_lock, flags);
lbs_deb_leave(LBS_DEB_THREAD);
}
EXPORT_SYMBOL_GPL(lbs_queue_event);
void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
{
lbs_deb_enter(LBS_DEB_THREAD);
lbs_deb_thread("lbs_interrupt: intcounter=%d\n", priv->intcounter);
priv->intcounter++;
if (priv->psstate == PS_STATE_SLEEP)
priv->psstate = PS_STATE_AWAKE;
/* Swap buffers by flipping the response index */
BUG_ON(resp_idx > 1);
priv->resp_idx = resp_idx;
wake_up_interruptible(&priv->waitq);
lbs_deb_leave(LBS_DEB_THREAD);
}
EXPORT_SYMBOL_GPL(lbs_interrupt);
EXPORT_SYMBOL_GPL(lbs_notify_command_response);
static int __init lbs_init_module(void)
{

4
drivers/net/wireless/libertas/rx.c
View file

@ -145,14 +145,14 @@ int lbs_process_rxed_packet(struct lbs_private *priv, struct sk_buff *skb)
struct net_device *dev = priv->dev;
struct rxpackethdr *p_rx_pkt;
struct rxpd *p_rx_pd;
int hdrchop;
struct ethhdr *p_ethhdr;
const u8 rfc1042_eth_hdr[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
lbs_deb_enter(LBS_DEB_RX);
BUG_ON(!skb);
skb->ip_summed = CHECKSUM_NONE;
if (priv->monitormode)

20
drivers/net/wireless/libertas/tx.c
View file

@ -179,31 +179,17 @@ int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
*
* @returns void
*/
void lbs_send_tx_feedback(struct lbs_private *priv)
void lbs_send_tx_feedback(struct lbs_private *priv, u32 try_count)
{
struct tx_radiotap_hdr *radiotap_hdr;
u32 status = priv->eventcause;
int txfail;
int try_count;
if (!priv->monitormode || priv->currenttxskb == NULL)
return;
radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data;
txfail = (status >> 24);
#if 0
/* The version of roofnet that we've tested does not use this yet
* But it may be used in the future.
*/
if (txfail)
radiotap_hdr->flags &= IEEE80211_RADIOTAP_F_TX_FAIL;
#endif
try_count = (status >> 16) & 0xff;
radiotap_hdr->data_retries = (try_count) ?
(1 + priv->txretrycount - try_count) : 0;
radiotap_hdr->data_retries = try_count ?
(1 + priv->txretrycount - try_count) : 0;
priv->currenttxskb->protocol = eth_type_trans(priv->currenttxskb,
priv->rtap_net_dev);