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Date: Wed, 9 Jul 2008 23:49:21 -0400 (EDT)
From: Sreenivasa Honnur <Sreenivasa.Honnur@...erion.com>
To: netdev@...r.kernel.org
cc: jeff@...zik.org, support@...erion.com
Subject: [PATCH 2/3]S2io: Enable msi-x link interrupts.
- Enable msi-x link interrupts because the timer based scheduler was getting
cancelled causing the link state to be lost with repetitive card up/downs
when changing the mtu.
- Unmask mac_rmac_link interrupts only for Xframe I and prevent a spurious
link interrupt in Xframe II.
- Stop the tx queue and indicate link down when card is down
Signed-off-by: Santosh Rastapur <santosh.rastapur@...erion.com>
Signed-off-by: Ramkrishna Vepa <ram.vepa@...erion.com>
---
diff -Nurp 2.0.26.25P1/drivers/net/s2io.c 2.0.26.25P2/drivers/net/s2io.c
--- 2.0.26.25P1/drivers/net/s2io.c 2008-06-30 13:41:25.000000000 -0700
+++ 2.0.26.25P2/drivers/net/s2io.c 2008-07-02 14:51:37.000000000 -0700
@@ -1909,8 +1909,6 @@ static int init_nic(struct s2io_nic *nic
static int s2io_link_fault_indication(struct s2io_nic *nic)
{
- if (nic->config.intr_type != INTA)
- return MAC_RMAC_ERR_TIMER;
if (nic->device_type == XFRAME_II_DEVICE)
return LINK_UP_DOWN_INTERRUPT;
else
@@ -1943,7 +1941,9 @@ static void en_dis_err_alarms(struct s2i
{
struct XENA_dev_config __iomem *bar0 = nic->bar0;
register u64 gen_int_mask = 0;
+ u64 interruptible;
+ writeq(DISABLE_ALL_INTRS, &bar0->general_int_mask);
if (mask & TX_DMA_INTR) {
gen_int_mask |= TXDMA_INT_M;
@@ -2033,10 +2033,12 @@ static void en_dis_err_alarms(struct s2i
gen_int_mask |= RXMAC_INT_M;
do_s2io_write_bits(MAC_INT_STATUS_RMAC_INT, flag,
&bar0->mac_int_mask);
- do_s2io_write_bits(RMAC_RX_BUFF_OVRN | RMAC_RX_SM_ERR |
+ interruptible = RMAC_RX_BUFF_OVRN | RMAC_RX_SM_ERR |
RMAC_UNUSED_INT | RMAC_SINGLE_ECC_ERR |
- RMAC_DOUBLE_ECC_ERR |
- RMAC_LINK_STATE_CHANGE_INT,
+ RMAC_DOUBLE_ECC_ERR;
+ if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER)
+ interruptible |= RMAC_LINK_STATE_CHANGE_INT;
+ do_s2io_write_bits(interruptible,
flag, &bar0->mac_rmac_err_mask);
}
@@ -4397,18 +4399,24 @@ static irqreturn_t s2io_msix_fifo_handle
/* Nothing much can be done. Get out */
return IRQ_HANDLED;
- writeq(S2IO_MINUS_ONE, &bar0->general_int_mask);
+ if (reason & (GEN_INTR_TXPIC | GEN_INTR_TXTRAFFIC)) {
+ writeq(S2IO_MINUS_ONE, &bar0->general_int_mask);
- 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(&fifos[i]);
+ if (reason & GEN_INTR_TXTRAFFIC)
+ writeq(S2IO_MINUS_ONE, &bar0->tx_traffic_int);
- writeq(sp->general_int_mask, &bar0->general_int_mask);
- readl(&bar0->general_int_status);
+ for (i = 0; i < config->tx_fifo_num; i++)
+ tx_intr_handler(&fifos[i]);
- return IRQ_HANDLED;
+ writeq(sp->general_int_mask, &bar0->general_int_mask);
+ readl(&bar0->general_int_status);
+ return IRQ_HANDLED;
+ }
+ /* The interrupt was not raised by us */
+ return IRQ_NONE;
}
static void s2io_txpic_intr_handle(struct s2io_nic *sp)
@@ -7135,6 +7143,9 @@ static void do_s2io_card_down(struct s2i
stop_nic(sp);
s2io_rem_isr(sp);
+
+ /* stop the tx queue, indicate link down */
+ s2io_link(sp, LINK_DOWN);
/* Check if the device is Quiescent and then Reset the NIC */
while(do_io) {
@@ -7268,17 +7279,19 @@ static int s2io_card_up(struct s2io_nic
S2IO_TIMER_CONF(sp->alarm_timer, s2io_alarm_handle, sp, (HZ/2));
+ set_bit(__S2IO_STATE_CARD_UP, &sp->state);
+
/* Enable select interrupts */
en_dis_err_alarms(sp, ENA_ALL_INTRS, ENABLE_INTRS);
- if (sp->config.intr_type != INTA)
- en_dis_able_nic_intrs(sp, TX_TRAFFIC_INTR, ENABLE_INTRS);
- else {
+ if (sp->config.intr_type != INTA) {
+ interruptible = TX_TRAFFIC_INTR | TX_PIC_INTR;
+ en_dis_able_nic_intrs(sp, interruptible, ENABLE_INTRS);
+ } else {
interruptible = TX_TRAFFIC_INTR | RX_TRAFFIC_INTR;
interruptible |= TX_PIC_INTR;
en_dis_able_nic_intrs(sp, interruptible, ENABLE_INTRS);
}
- set_bit(__S2IO_STATE_CARD_UP, &sp->state);
return 0;
}
diff -Nurp 2.0.26.25P1/drivers/net/s2io.h 2.0.26.25P2/drivers/net/s2io.h
--- 2.0.26.25P1/drivers/net/s2io.h 2008-06-30 13:41:25.000000000 -0700
+++ 2.0.26.25P2/drivers/net/s2io.h 2008-06-30 13:41:50.000000000 -0700
@@ -1107,6 +1107,7 @@ static int init_shared_mem(struct s2io_n
static void free_shared_mem(struct s2io_nic *sp);
static int init_nic(struct s2io_nic *nic);
static int rx_intr_handler(struct ring_info *ring_data, int budget);
+static void s2io_txpic_intr_handle(struct s2io_nic *sp);
static void tx_intr_handler(struct fifo_info *fifo_data);
static void s2io_handle_errors(void * dev_id);
--
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