Commit 228241eb authored by Eliezer Tamir's avatar Eliezer Tamir Committed by David S. Miller
Browse files

[BNX2X]: fix slowpath races and locking



Fixed locking between fastpath and slowpath operations.

Corrected order of traffic disabling to prevent race when going down
under traffic.

- first have the microcode drop all incoming packets
- then do the slowpath stuff
- only then reset the MAC

Got rid of in_reset_task.

Remove_one() and friends would deference a null pointer if init_one
failed.
Signed-off-by: default avatarEliezer Tamir <eliezert@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 877e9aa4
......@@ -6881,14 +6881,11 @@ static void bnx2x_free_msix_irqs(struct bnx2x *bp)
"state(%x)\n", i, bp->msix_table[i + 1].vector,
bnx2x_fp(bp, i, state));
if (bnx2x_fp(bp, i, state) != BNX2X_FP_STATE_CLOSED) {
free_irq(bp->msix_table[i + 1].vector, &bp->fp[i]);
bnx2x_fp(bp, i, state) = BNX2X_FP_STATE_CLOSED;
} else
DP(NETIF_MSG_IFDOWN, "irq not freed\n");
if (bnx2x_fp(bp, i, state) != BNX2X_FP_STATE_CLOSED)
BNX2X_ERR("IRQ of fp #%d being freed while "
"state != closed\n", i);
free_irq(bp->msix_table[i + 1].vector, &bp->fp[i]);
}
}
......@@ -6918,7 +6915,7 @@ static int bnx2x_enable_msix(struct bnx2x *bp)
if (pci_enable_msix(bp->pdev, &bp->msix_table[0],
bp->num_queues + 1)){
BNX2X_ERR("failed to enable msix\n");
BNX2X_LOG("failed to enable MSI-X\n");
return -1;
}
......@@ -6935,8 +6932,6 @@ static int bnx2x_req_msix_irqs(struct bnx2x *bp)
int i, rc;
DP(NETIF_MSG_IFUP, "about to request sp irq\n");
rc = request_irq(bp->msix_table[0].vector, bnx2x_msix_sp_int, 0,
bp->dev->name, bp->dev);
......@@ -6951,7 +6946,8 @@ static int bnx2x_req_msix_irqs(struct bnx2x *bp)
bp->dev->name, &bp->fp[i]);
if (rc) {
BNX2X_ERR("request fp #%d irq failed\n", i);
BNX2X_ERR("request fp #%d irq failed "
"rc %d\n", i, rc);
bnx2x_free_msix_irqs(bp);
return -EBUSY;
}
......@@ -7084,12 +7080,13 @@ static int bnx2x_setup_multi(struct bnx2x *bp, int index)
/* reset IGU state */
bnx2x_ack_sb(bp, index, CSTORM_ID, 0, IGU_INT_ENABLE, 0);
/* SETUP ramrod */
bp->fp[index].state = BNX2X_FP_STATE_OPENING;
bnx2x_sp_post(bp, RAMROD_CMD_ID_ETH_CLIENT_SETUP, index, 0, index, 0);
/* Wait for completion */
return bnx2x_wait_ramrod(bp, BNX2X_FP_STATE_OPEN, index,
&(bp->fp[index].state), 1);
&(bp->fp[index].state), 0);
}
......@@ -7099,8 +7096,8 @@ static void bnx2x_set_rx_mode(struct net_device *dev);
static int bnx2x_nic_load(struct bnx2x *bp, int req_irq)
{
int rc;
int i = 0;
u32 load_code;
int i;
bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD;
......@@ -7110,12 +7107,17 @@ static int bnx2x_nic_load(struct bnx2x *bp, int req_irq)
initialized, otherwise - not.
*/
if (!nomcp) {
rc = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_REQ);
if (rc == FW_MSG_CODE_DRV_LOAD_REFUSED) {
load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_REQ);
if (!load_code) {
BNX2X_ERR("MCP response failure, unloading\n");
return -EBUSY;
}
if (load_code == FW_MSG_CODE_DRV_LOAD_REFUSED) {
BNX2X_ERR("MCP refused load request, unloading\n");
return -EBUSY; /* other port in diagnostic mode */
}
} else {
rc = FW_MSG_CODE_DRV_LOAD_COMMON;
load_code = FW_MSG_CODE_DRV_LOAD_COMMON;
}
/* if we can't use msix we only need one fp,
......@@ -7153,13 +7155,13 @@ static int bnx2x_nic_load(struct bnx2x *bp, int req_irq)
if (bp->flags & USING_MSIX_FLAG) {
if (bnx2x_req_msix_irqs(bp)) {
pci_disable_msix(bp->pdev);
goto out_error;
goto load_error;
}
} else {
if (bnx2x_req_irq(bp)) {
BNX2X_ERR("IRQ request failed, aborting\n");
goto out_error;
goto load_error;
}
}
}
......@@ -7170,9 +7172,10 @@ static int bnx2x_nic_load(struct bnx2x *bp, int req_irq)
/* Initialize HW */
if (bnx2x_function_init(bp, (rc == FW_MSG_CODE_DRV_LOAD_COMMON))) {
if (bnx2x_function_init(bp,
(load_code == FW_MSG_CODE_DRV_LOAD_COMMON))) {
BNX2X_ERR("HW init failed, aborting\n");
goto out_error;
goto load_error;
}
......@@ -7184,11 +7187,10 @@ static int bnx2x_nic_load(struct bnx2x *bp, int req_irq)
/* Send LOAD_DONE command to MCP */
if (!nomcp) {
rc = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE);
DP(NETIF_MSG_IFUP, "rc = 0x%x\n", rc);
if (!rc) {
load_code = bnx2x_fw_command(bp, DRV_MSG_CODE_LOAD_DONE);
if (!load_code) {
BNX2X_ERR("MCP response failure, unloading\n");
goto int_disable;
goto load_int_disable;
}
}
......@@ -7200,11 +7202,11 @@ static int bnx2x_nic_load(struct bnx2x *bp, int req_irq)
napi_enable(&bnx2x_fp(bp, i, napi));
if (bnx2x_setup_leading(bp))
goto stop_netif;
goto load_stop_netif;
for_each_nondefault_queue(bp, i)
if (bnx2x_setup_multi(bp, i))
goto stop_netif;
goto load_stop_netif;
bnx2x_set_mac_addr(bp);
......@@ -7228,42 +7230,24 @@ static int bnx2x_nic_load(struct bnx2x *bp, int req_irq)
return 0;
stop_netif:
load_stop_netif:
for_each_queue(bp, i)
napi_disable(&bnx2x_fp(bp, i, napi));
int_disable:
load_int_disable:
bnx2x_int_disable_sync(bp);
bnx2x_free_skbs(bp);
bnx2x_free_irq(bp);
out_error:
load_error:
bnx2x_free_mem(bp);
/* TBD we really need to reset the chip
if we want to recover from this */
return rc;
return -EBUSY;
}
static void bnx2x_netif_stop(struct bnx2x *bp)
{
int i;
bp->rx_mode = BNX2X_RX_MODE_NONE;
bnx2x_set_storm_rx_mode(bp);
bnx2x_int_disable_sync(bp);
bnx2x_link_reset(bp);
for_each_queue(bp, i)
napi_disable(&bnx2x_fp(bp, i, napi));
if (netif_running(bp->dev)) {
netif_tx_disable(bp->dev);
bp->dev->trans_start = jiffies; /* prevent tx timeout */
}
}
static void bnx2x_reset_chip(struct bnx2x *bp, u32 reset_code)
{
......@@ -7354,7 +7338,7 @@ static void bnx2x_stop_leading(struct bnx2x *bp)
dsb_sp_prod_idx = *bp->dsb_sp_prod;
/* Send CFC_DELETE ramrod */
/* Send PORT_DELETE ramrod */
bnx2x_sp_post(bp, RAMROD_CMD_ID_ETH_PORT_DEL, 0, 0, 0, 1);
/* Wait for completion to arrive on default status block
......@@ -7375,35 +7359,48 @@ static void bnx2x_stop_leading(struct bnx2x *bp)
}
static int bnx2x_nic_unload(struct bnx2x *bp, int fre_irq)
static int bnx2x_nic_unload(struct bnx2x *bp, int free_irq)
{
u32 reset_code = 0;
int rc;
int i;
int i, timeout;
bp->state = BNX2X_STATE_CLOSING_WAIT4_HALT;
/* Calling flush_scheduled_work() may deadlock because
* linkwatch_event() may be on the workqueue and it will try to get
* the rtnl_lock which we are holding.
*/
del_timer_sync(&bp->timer);
while (bp->in_reset_task)
msleep(1);
bp->rx_mode = BNX2X_RX_MODE_NONE;
bnx2x_set_storm_rx_mode(bp);
/* Delete the timer: do it before disabling interrupts, as it
may be still STAT_QUERY ramrod pending after stopping the timer */
del_timer_sync(&bp->timer);
if (netif_running(bp->dev)) {
netif_tx_disable(bp->dev);
bp->dev->trans_start = jiffies; /* prevent tx timeout */
}
/* Wait until all fast path tasks complete */
for_each_queue(bp, i) {
struct bnx2x_fastpath *fp = &bp->fp[i];
timeout = 1000;
while (bnx2x_has_work(fp) && (timeout--))
msleep(1);
if (!timeout)
BNX2X_ERR("timeout waiting for queue[%d]\n", i);
}
/* Wait until stat ramrod returns and all SP tasks complete */
while (bp->stat_pending && (bp->spq_left != MAX_SPQ_PENDING))
timeout = 1000;
while ((bp->stat_pending || (bp->spq_left != MAX_SPQ_PENDING)) &&
(timeout--))
msleep(1);
/* Stop fast path, disable MAC, disable interrupts, disable napi */
bnx2x_netif_stop(bp);
for_each_queue(bp, i)
napi_disable(&bnx2x_fp(bp, i, napi));
/* Disable interrupts after Tx and Rx are disabled on stack level */
bnx2x_int_disable_sync(bp);
if (bp->flags & NO_WOL_FLAG)
reset_code = DRV_MSG_CODE_UNLOAD_REQ_WOL_MCP;
else if (bp->wol) {
u32 emac_base = bp->port ? GRCBASE_EMAC0 : GRCBASE_EMAC1;
u8 *mac_addr = bp->dev->dev_addr;
......@@ -7420,28 +7417,37 @@ static int bnx2x_nic_unload(struct bnx2x *bp, int fre_irq)
EMAC_WR(EMAC_REG_EMAC_MAC_MATCH + 4, val);
reset_code = DRV_MSG_CODE_UNLOAD_REQ_WOL_EN;
} else
reset_code = DRV_MSG_CODE_UNLOAD_REQ_WOL_DIS;
/* Close multi and leading connections */
for_each_nondefault_queue(bp, i)
if (bnx2x_stop_multi(bp, i))
goto error;
goto unload_error;
bnx2x_stop_leading(bp);
if ((bp->state != BNX2X_STATE_CLOSING_WAIT4_UNLOAD) ||
(bp->fp[0].state != BNX2X_FP_STATE_CLOSED)) {
DP(NETIF_MSG_IFDOWN, "failed to close leading properly!"
"state 0x%x fp[0].state 0x%x",
bp->state, bp->fp[0].state);
}
unload_error:
bnx2x_link_reset(bp);
error:
if (!nomcp)
rc = bnx2x_fw_command(bp, reset_code);
reset_code = bnx2x_fw_command(bp, reset_code);
else
rc = FW_MSG_CODE_DRV_UNLOAD_COMMON;
reset_code = FW_MSG_CODE_DRV_UNLOAD_COMMON;
/* Release IRQs */
if (fre_irq)
if (free_irq)
bnx2x_free_irq(bp);
/* Reset the chip */
bnx2x_reset_chip(bp, rc);
bnx2x_reset_chip(bp, reset_code);
/* Report UNLOAD_DONE to MCP */
if (!nomcp)
......@@ -7452,8 +7458,7 @@ error:
bnx2x_free_mem(bp);
bp->state = BNX2X_STATE_CLOSED;
/* Set link down */
bp->link_up = 0;
netif_carrier_off(bp->dev);
return 0;
......@@ -9468,16 +9473,13 @@ static int bnx2x_open(struct net_device *dev)
/* Called with rtnl_lock */
static int bnx2x_close(struct net_device *dev)
{
int rc;
struct bnx2x *bp = netdev_priv(dev);
/* Unload the driver, release IRQs */
rc = bnx2x_nic_unload(bp, 1);
if (rc) {
BNX2X_ERR("bnx2x_nic_unload failed: %d\n", rc);
return rc;
}
bnx2x_set_power_state(bp, PCI_D3hot);
bnx2x_nic_unload(bp, 1);
if (!CHIP_REV_IS_SLOW(bp))
bnx2x_set_power_state(bp, PCI_D3hot);
return 0;
}
......@@ -9620,14 +9622,18 @@ static void bnx2x_reset_task(struct work_struct *work)
if (!netif_running(bp->dev))
return;
bp->in_reset_task = 1;
rtnl_lock();
bnx2x_netif_stop(bp);
if (bp->state != BNX2X_STATE_OPEN) {
DP(NETIF_MSG_TX_ERR, "state is %x, returning\n", bp->state);
goto reset_task_exit;
}
bnx2x_nic_unload(bp, 0);
bnx2x_nic_load(bp, 0);
bp->in_reset_task = 0;
reset_task_exit:
rtnl_unlock();
}
static int __devinit bnx2x_init_board(struct pci_dev *pdev,
......@@ -9708,8 +9714,6 @@ static int __devinit bnx2x_init_board(struct pci_dev *pdev,
spin_lock_init(&bp->phy_lock);
bp->in_reset_task = 0;
INIT_WORK(&bp->reset_task, bnx2x_reset_task);
INIT_WORK(&bp->sp_task, bnx2x_sp_task);
......@@ -9916,10 +9920,16 @@ static int __devinit bnx2x_init_one(struct pci_dev *pdev,
static void __devexit bnx2x_remove_one(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct bnx2x *bp = netdev_priv(dev);
struct bnx2x *bp;
if (!dev) {
/* we get here if init_one() fails */
printk(KERN_ERR PFX "BAD net device from bnx2x_init_one\n");
return;
}
bp = netdev_priv(dev);
flush_scheduled_work();
/*tasklet_kill(&bp->sp_task);*/
unregister_netdev(dev);
if (bp->regview)
......@@ -9937,34 +9947,43 @@ static void __devexit bnx2x_remove_one(struct pci_dev *pdev)
static int bnx2x_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct bnx2x *bp = netdev_priv(dev);
int rc;
struct bnx2x *bp;
if (!dev)
return 0;
if (!netif_running(dev))
return 0;
rc = bnx2x_nic_unload(bp, 0);
if (!rc)
return rc;
bp = netdev_priv(dev);
bnx2x_nic_unload(bp, 0);
netif_device_detach(dev);
pci_save_state(pdev);
pci_save_state(pdev);
bnx2x_set_power_state(bp, pci_choose_state(pdev, state));
return 0;
}
static int bnx2x_resume(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct bnx2x *bp = netdev_priv(dev);
struct bnx2x *bp;
int rc;
if (!dev) {
printk(KERN_ERR PFX "BAD net device from bnx2x_init_one\n");
return -ENODEV;
}
if (!netif_running(dev))
return 0;
pci_restore_state(pdev);
bp = netdev_priv(dev);
pci_restore_state(pdev);
bnx2x_set_power_state(bp, PCI_D0);
netif_device_attach(dev);
......
......@@ -545,8 +545,6 @@ struct bnx2x {
spinlock_t phy_lock;
struct work_struct reset_task;
u16 in_reset_task;
struct work_struct sp_task;
struct timer_list timer;
......@@ -560,7 +558,6 @@ struct bnx2x {
#define CHIP_ID(bp) (((bp)->chip_id) & 0xfffffff0)
#define CHIP_NUM(bp) (((bp)->chip_id) & 0xffff0000)
#define CHIP_NUM_5710 0x57100000
#define CHIP_REV(bp) (((bp)->chip_id) & 0x0000f000)
#define CHIP_REV_Ax 0x00000000
......
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