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-rw-r--r--drivers/net/s2io.c157
-rw-r--r--drivers/net/s2io.h1
2 files changed, 61 insertions, 97 deletions
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index d167bc0ae951..ac6b9b93c025 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -84,7 +84,7 @@
#include "s2io.h"
#include "s2io-regs.h"
-#define DRV_VERSION "2.0.26.1"
+#define DRV_VERSION "2.0.26.2"
/* S2io Driver name & version. */
static char s2io_driver_name[] = "Neterion";
@@ -2715,12 +2715,8 @@ static int s2io_poll(struct napi_struct *napi, int budget)
struct XENA_dev_config __iomem *bar0 = nic->bar0;
int i;
- atomic_inc(&nic->isr_cnt);
-
- if (!is_s2io_card_up(nic)) {
- atomic_dec(&nic->isr_cnt);
+ if (!is_s2io_card_up(nic))
return 0;
- }
mac_control = &nic->mac_control;
config = &nic->config;
@@ -2752,7 +2748,6 @@ static int s2io_poll(struct napi_struct *napi, int budget)
/* Re enable the Rx interrupts. */
writeq(0x0, &bar0->rx_traffic_mask);
readl(&bar0->rx_traffic_mask);
- atomic_dec(&nic->isr_cnt);
return pkt_cnt;
no_rx:
@@ -2763,7 +2758,6 @@ no_rx:
break;
}
}
- atomic_dec(&nic->isr_cnt);
return pkt_cnt;
}
@@ -2791,7 +2785,6 @@ static void s2io_netpoll(struct net_device *dev)
disable_irq(dev->irq);
- atomic_inc(&nic->isr_cnt);
mac_control = &nic->mac_control;
config = &nic->config;
@@ -2816,7 +2809,6 @@ static void s2io_netpoll(struct net_device *dev)
break;
}
}
- atomic_dec(&nic->isr_cnt);
enable_irq(dev->irq);
return;
}
@@ -4187,17 +4179,12 @@ static irqreturn_t s2io_msix_ring_handle(int irq, void *dev_id)
struct ring_info *ring = (struct ring_info *)dev_id;
struct s2io_nic *sp = ring->nic;
- atomic_inc(&sp->isr_cnt);
-
- if (!is_s2io_card_up(sp)) {
- atomic_dec(&sp->isr_cnt);
+ if (!is_s2io_card_up(sp))
return IRQ_HANDLED;
- }
rx_intr_handler(ring);
s2io_chk_rx_buffers(sp, ring->ring_no);
- atomic_dec(&sp->isr_cnt);
return IRQ_HANDLED;
}
@@ -4206,15 +4193,10 @@ static irqreturn_t s2io_msix_fifo_handle(int irq, void *dev_id)
struct fifo_info *fifo = (struct fifo_info *)dev_id;
struct s2io_nic *sp = fifo->nic;
- atomic_inc(&sp->isr_cnt);
-
- if (!is_s2io_card_up(sp)) {
- atomic_dec(&sp->isr_cnt);
+ if (!is_s2io_card_up(sp))
return IRQ_HANDLED;
- }
tx_intr_handler(fifo);
- atomic_dec(&sp->isr_cnt);
return IRQ_HANDLED;
}
static void s2io_txpic_intr_handle(struct s2io_nic *sp)
@@ -4591,12 +4573,8 @@ static irqreturn_t s2io_isr(int irq, void *dev_id)
if (pci_channel_offline(sp->pdev))
return IRQ_NONE;
- atomic_inc(&sp->isr_cnt);
-
- if (!is_s2io_card_up(sp)) {
- atomic_dec(&sp->isr_cnt);
+ if (!is_s2io_card_up(sp))
return IRQ_NONE;
- }
mac_control = &sp->mac_control;
config = &sp->config;
@@ -4607,73 +4585,75 @@ static irqreturn_t s2io_isr(int irq, void *dev_id)
* 1. Rx of packet.
* 2. Tx complete.
* 3. Link down.
- * 4. Error in any functional blocks of the NIC.
*/
reason = readq(&bar0->general_int_status);
- if (!reason) {
- /* The interrupt was not raised by us. */
- atomic_dec(&sp->isr_cnt);
- return IRQ_NONE;
- }
- else if (unlikely(reason == S2IO_MINUS_ONE) ) {
- /* Disable device and get out */
- atomic_dec(&sp->isr_cnt);
- return IRQ_NONE;
+ if (unlikely(reason == S2IO_MINUS_ONE) ) {
+ /* Nothing much can be done. Get out */
+ return IRQ_HANDLED;
}
- if (napi) {
- if (reason & GEN_INTR_RXTRAFFIC) {
- if (likely (netif_rx_schedule_prep(dev, &sp->napi))) {
- __netif_rx_schedule(dev, &sp->napi);
- writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_mask);
+ if (reason & (GEN_INTR_RXTRAFFIC |
+ GEN_INTR_TXTRAFFIC | GEN_INTR_TXPIC))
+ {
+ writeq(S2IO_MINUS_ONE, &bar0->general_int_mask);
+
+ if (config->napi) {
+ if (reason & GEN_INTR_RXTRAFFIC) {
+ if (likely(netif_rx_schedule_prep(dev,
+ &sp->napi))) {
+ __netif_rx_schedule(dev, &sp->napi);
+ writeq(S2IO_MINUS_ONE,
+ &bar0->rx_traffic_mask);
+ } else
+ writeq(S2IO_MINUS_ONE,
+ &bar0->rx_traffic_int);
}
- else
+ } else {
+ /*
+ * rx_traffic_int reg is an R1 register, writing all 1's
+ * will ensure that the actual interrupt causing bit
+ * get's cleared and hence a read can be avoided.
+ */
+ if (reason & GEN_INTR_RXTRAFFIC)
writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
+
+ for (i = 0; i < config->rx_ring_num; i++)
+ rx_intr_handler(&mac_control->rings[i]);
}
- } else {
+
/*
- * Rx handler is called by default, without checking for the
- * cause of interrupt.
- * rx_traffic_int reg is an R1 register, writing all 1's
+ * tx_traffic_int reg is an R1 register, writing all 1's
* will ensure that the actual interrupt causing bit get's
* cleared and hence a read can be avoided.
*/
- if (reason & GEN_INTR_RXTRAFFIC)
- writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
+ if (reason & GEN_INTR_TXTRAFFIC)
+ writeq(S2IO_MINUS_ONE, &bar0->tx_traffic_int);
- for (i = 0; i < config->rx_ring_num; i++) {
- rx_intr_handler(&mac_control->rings[i]);
- }
- }
+ for (i = 0; i < config->tx_fifo_num; i++)
+ tx_intr_handler(&mac_control->fifos[i]);
- /*
- * tx_traffic_int reg is an R1 register, writing all 1's
- * will ensure that the actual interrupt causing bit get's
- * cleared and hence a read can be avoided.
- */
- if (reason & GEN_INTR_TXTRAFFIC)
- writeq(S2IO_MINUS_ONE, &bar0->tx_traffic_int);
+ if (reason & GEN_INTR_TXPIC)
+ s2io_txpic_intr_handle(sp);
- for (i = 0; i < config->tx_fifo_num; i++)
- tx_intr_handler(&mac_control->fifos[i]);
+ /*
+ * Reallocate the buffers from the interrupt handler itself.
+ */
+ if (!config->napi) {
+ for (i = 0; i < config->rx_ring_num; i++)
+ s2io_chk_rx_buffers(sp, i);
+ }
+ writeq(sp->general_int_mask, &bar0->general_int_mask);
+ readl(&bar0->general_int_status);
- if (reason & GEN_INTR_TXPIC)
- s2io_txpic_intr_handle(sp);
- /*
- * If the Rx buffer count is below the panic threshold then
- * reallocate the buffers from the interrupt handler itself,
- * else schedule a tasklet to reallocate the buffers.
- */
- if (!napi) {
- for (i = 0; i < config->rx_ring_num; i++)
- s2io_chk_rx_buffers(sp, i);
- }
+ return IRQ_HANDLED;
- writeq(0, &bar0->general_int_mask);
- readl(&bar0->general_int_status);
+ }
+ else if (!reason) {
+ /* The interrupt was not raised by us */
+ return IRQ_NONE;
+ }
- atomic_dec(&sp->isr_cnt);
return IRQ_HANDLED;
}
@@ -6795,7 +6775,6 @@ static int s2io_add_isr(struct s2io_nic * sp)
}
static void s2io_rem_isr(struct s2io_nic * sp)
{
- int cnt = 0;
struct net_device *dev = sp->dev;
struct swStat *stats = &sp->mac_control.stats_info->sw_stat;
@@ -6808,6 +6787,7 @@ static void s2io_rem_isr(struct s2io_nic * sp)
int vector = sp->entries[i].vector;
void *arg = sp->s2io_entries[i].arg;
+ synchronize_irq(vector);
free_irq(vector, arg);
}
@@ -6826,16 +6806,9 @@ static void s2io_rem_isr(struct s2io_nic * sp)
pci_disable_msix(sp->pdev);
} else {
+ synchronize_irq(sp->pdev->irq);
free_irq(sp->pdev->irq, dev);
}
- /* Waiting till all Interrupt handlers are complete */
- cnt = 0;
- do {
- msleep(10);
- if (!atomic_read(&sp->isr_cnt))
- break;
- cnt++;
- } while(cnt < 5);
}
static void do_s2io_card_down(struct s2io_nic * sp, int do_io)
@@ -7365,19 +7338,12 @@ static int s2io_verify_parm(struct pci_dev *pdev, u8 *dev_intr_type)
if (*dev_intr_type != INTA)
napi = 0;
-#ifndef CONFIG_PCI_MSI
- if (*dev_intr_type != INTA) {
- DBG_PRINT(ERR_DBG, "s2io: This kernel does not support"
- "MSI/MSI-X. Defaulting to INTA\n");
- *dev_intr_type = INTA;
- }
-#else
if ((*dev_intr_type != INTA) && (*dev_intr_type != MSI_X)) {
DBG_PRINT(ERR_DBG, "s2io: Wrong intr_type requested. "
"Defaulting to INTA\n");
*dev_intr_type = INTA;
}
-#endif
+
if ((*dev_intr_type == MSI_X) &&
((pdev->device != PCI_DEVICE_ID_HERC_WIN) &&
(pdev->device != PCI_DEVICE_ID_HERC_UNI))) {
@@ -7535,6 +7501,8 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
mac_control = &sp->mac_control;
config = &sp->config;
+ config->napi = napi;
+
/* Tx side parameters. */
config->tx_fifo_num = tx_fifo_num;
for (i = 0; i < MAX_TX_FIFOS; i++) {
@@ -7582,9 +7550,6 @@ s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
for (i = 0; i < config->rx_ring_num; i++)
atomic_set(&sp->rx_bufs_left[i], 0);
- /* Initialize the number of ISRs currently running */
- atomic_set(&sp->isr_cnt, 0);
-
/* initialize the shared memory used by the NIC and the host */
if (init_shared_mem(sp)) {
DBG_PRINT(ERR_DBG, "%s: Memory allocation failed\n",
diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index 33e812ea7d18..1a70cf02c915 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -911,7 +911,6 @@ struct s2io_nic {
u16 lro_max_aggr_per_sess;
volatile unsigned long state;
spinlock_t rx_lock;
- atomic_t isr_cnt;
u64 general_int_mask;
u64 *ufo_in_band_v;
#define VPD_STRING_LEN 80
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