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qlcnic: refactor Legacy interrupt handling for 83xx 

o Cleanly seperate 83xx Legacy interrupt handling code from 82xx
o Update 83xx Legacy interrupt handling code to match with the spec

Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Himanshu Madhani 2013-02-18 12:06:15 +00:00 committed by David S. Miller
parent 7dd90cf171
commit ac16670099
4 changed files with 144 additions and 56 deletions
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128
drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c
View File

@ -388,12 +388,45 @@ int qlcnic_83xx_setup_intr(struct qlcnic_adapter *adapter, u8 num_intr)
return 0;
}
inline void qlcnic_83xx_enable_intr(struct qlcnic_adapter *adapter,
inline void qlcnic_83xx_clear_legacy_intr_mask(struct qlcnic_adapter *adapter)
{
writel(0, adapter->tgt_mask_reg);
}
/* Enable MSI-x and INT-x interrupts */
void qlcnic_83xx_enable_intr(struct qlcnic_adapter *adapter,
struct qlcnic_host_sds_ring *sds_ring)
{
writel(0, sds_ring->crb_intr_mask);
if (!QLCNIC_IS_MSI_FAMILY(adapter))
writel(0, adapter->tgt_mask_reg);
}
/* Disable MSI-x and INT-x interrupts */
void qlcnic_83xx_disable_intr(struct qlcnic_adapter *adapter,
struct qlcnic_host_sds_ring *sds_ring)
{
writel(1, sds_ring->crb_intr_mask);
}
inline void qlcnic_83xx_enable_legacy_msix_mbx_intr(struct qlcnic_adapter
*adapter)
{
u32 mask;
/* Mailbox in MSI-x mode and Legacy Interrupt share the same
* source register. We could be here before contexts are created
* and sds_ring->crb_intr_mask has not been initialized, calculate
* BAR offset for Interrupt Source Register
*/
mask = QLCRDX(adapter->ahw, QLCNIC_DEF_INT_MASK);
writel(0, adapter->ahw->pci_base0 + mask);
}
inline void qlcnic_83xx_disable_mbx_intr(struct qlcnic_adapter *adapter)
{
u32 mask;
mask = QLCRDX(adapter->ahw, QLCNIC_DEF_INT_MASK);
writel(1, adapter->ahw->pci_base0 + mask);
}
static inline void qlcnic_83xx_get_mbx_data(struct qlcnic_adapter *adapter,
@ -419,8 +452,12 @@ irqreturn_t qlcnic_83xx_clear_legacy_intr(struct qlcnic_adapter *adapter)
adapter->stats.spurious_intr++;
return IRQ_NONE;
}
/* The barrier is required to ensure writes to the registers */
wmb();
/* clear the interrupt trigger control register */
writel(0, adapter->isr_int_vec);
intr_val = readl(adapter->isr_int_vec);
do {
intr_val = readl(adapter->tgt_status_reg);
if (QLC_83XX_INTX_FUNC(intr_val) != ahw->pci_func)
@ -429,13 +466,51 @@ irqreturn_t qlcnic_83xx_clear_legacy_intr(struct qlcnic_adapter *adapter)
} while (QLC_83XX_VALID_INTX_BIT30(intr_val) &&
(retries < QLC_83XX_LEGACY_INTX_MAX_RETRY));
if (retries == QLC_83XX_LEGACY_INTX_MAX_RETRY) {
dev_info(&adapter->pdev->dev,
"Reached maximum retries to clear legacy interrupt\n");
return IRQ_NONE;
return IRQ_HANDLED;
}
mdelay(QLC_83XX_LEGACY_INTX_DELAY);
static void qlcnic_83xx_poll_process_aen(struct qlcnic_adapter *adapter)
{
u32 resp, event;
unsigned long flags;
spin_lock_irqsave(&adapter->ahw->mbx_lock, flags);
resp = QLCRDX(adapter->ahw, QLCNIC_FW_MBX_CTRL);
if (!(resp & QLCNIC_SET_OWNER))
goto out;
event = readl(QLCNIC_MBX_FW(adapter->ahw, 0));
if (event & QLCNIC_MBX_ASYNC_EVENT)
qlcnic_83xx_process_aen(adapter);
out:
qlcnic_83xx_enable_legacy_msix_mbx_intr(adapter);
spin_unlock_irqrestore(&adapter->ahw->mbx_lock, flags);
}
irqreturn_t qlcnic_83xx_intr(int irq, void *data)
{
struct qlcnic_adapter *adapter = data;
struct qlcnic_host_sds_ring *sds_ring;
struct qlcnic_hardware_context *ahw = adapter->ahw;
if (qlcnic_83xx_clear_legacy_intr(adapter) == IRQ_NONE)
return IRQ_NONE;
qlcnic_83xx_poll_process_aen(adapter);
if (ahw->diag_test == QLCNIC_INTERRUPT_TEST) {
ahw->diag_cnt++;
qlcnic_83xx_enable_legacy_msix_mbx_intr(adapter);
return IRQ_HANDLED;
}
if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
qlcnic_83xx_enable_legacy_msix_mbx_intr(adapter);
} else {
sds_ring = &adapter->recv_ctx->sds_rings[0];
napi_schedule(&sds_ring->napi);
}
return IRQ_HANDLED;
}
@ -460,13 +535,19 @@ done:
void qlcnic_83xx_free_mbx_intr(struct qlcnic_adapter *adapter)
{
u32 val = 0;
u32 num_msix = adapter->ahw->num_msix - 1;
u32 val = 0, num_msix = adapter->ahw->num_msix - 1;
val = (num_msix << 8);
if (adapter->flags & QLCNIC_MSIX_ENABLED)
num_msix = adapter->ahw->num_msix - 1;
else
num_msix = 0;
QLCWRX(adapter->ahw, QLCNIC_MBX_INTR_ENBL, val);
if (adapter->flags & QLCNIC_MSIX_ENABLED)
qlcnic_83xx_disable_mbx_intr(adapter);
msleep(20);
synchronize_irq(adapter->msix_entries[num_msix].vector);
free_irq(adapter->msix_entries[num_msix].vector, adapter);
}
@ -486,13 +567,23 @@ int qlcnic_83xx_setup_mbx_intr(struct qlcnic_adapter *adapter)
handler = qlcnic_83xx_handle_aen;
val = adapter->msix_entries[adapter->ahw->num_msix - 1].vector;
snprintf(name, (IFNAMSIZ + 4),
"%s[%s]", adapter->netdev->name, "aen");
"%s[%s]", "qlcnic", "aen");
err = request_irq(val, handler, flags, name, adapter);
if (err) {
dev_err(&adapter->pdev->dev,
"failed to register MBX interrupt\n");
return err;
}
} else {
handler = qlcnic_83xx_intr;
val = adapter->msix_entries[0].vector;
err = request_irq(val, handler, flags, "qlcnic", adapter);
if (err) {
dev_err(&adapter->pdev->dev,
"failed to register INTx interrupt\n");
return err;
}
qlcnic_83xx_clear_legacy_intr_mask(adapter);
}
/* Enable mailbox interrupt */
@ -604,6 +695,7 @@ void qlcnic_83xx_enable_mbx_intrpt(struct qlcnic_adapter *adapter)
val = BIT_2;
QLCWRX(adapter->ahw, QLCNIC_MBX_INTR_ENBL, val);
qlcnic_83xx_enable_legacy_msix_mbx_intr(adapter);
}
void qlcnic_83xx_check_vf(struct qlcnic_adapter *adapter,
@ -700,6 +792,7 @@ int qlcnic_83xx_mbx_op(struct qlcnic_adapter *adapter,
int i;
u16 opcode;
u8 mbx_err_code;
unsigned long flags;
u32 rsp, mbx_val, fw_data, rsp_num, mbx_cmd;
struct qlcnic_hardware_context *ahw = adapter->ahw;
@ -711,7 +804,7 @@ int qlcnic_83xx_mbx_op(struct qlcnic_adapter *adapter,
return 0;
}
spin_lock(&ahw->mbx_lock);
spin_lock_irqsave(&adapter->ahw->mbx_lock, flags);
mbx_val = QLCRDX(ahw, QLCNIC_HOST_MBX_CTRL);
if (mbx_val) {
@ -721,7 +814,7 @@ int qlcnic_83xx_mbx_op(struct qlcnic_adapter *adapter,
"Mailbox not available, 0x%x, collect FW dump\n",
mbx_val);
cmd->rsp.arg[0] = QLCNIC_RCODE_TIMEOUT;
spin_unlock(&ahw->mbx_lock);
spin_unlock_irqrestore(&adapter->ahw->mbx_lock, flags);
return cmd->rsp.arg[0];
}
@ -776,7 +869,7 @@ poll:
out:
/* clear fw mbx control register */
QLCWRX(ahw, QLCNIC_FW_MBX_CTRL, QLCNIC_CLR_OWNER);
spin_unlock(&ahw->mbx_lock);
spin_unlock_irqrestore(&adapter->ahw->mbx_lock, flags);
return rsp;
}
@ -1194,7 +1287,7 @@ static void qlcnic_83xx_diag_free_res(struct net_device *netdev,
if (adapter->ahw->diag_test == QLCNIC_INTERRUPT_TEST) {
for (ring = 0; ring < adapter->max_sds_rings; ring++) {
sds_ring = &adapter->recv_ctx->sds_rings[ring];
writel(1, sds_ring->crb_intr_mask);
qlcnic_83xx_disable_intr(adapter, sds_ring);
}
}
@ -1730,6 +1823,7 @@ irqreturn_t qlcnic_83xx_handle_aen(int irq, void *data)
resp = QLCRDX(adapter->ahw, QLCNIC_FW_MBX_CTRL);
if (!(resp & QLCNIC_SET_OWNER))
goto out;
event = readl(QLCNIC_MBX_FW(adapter->ahw, 0));
if (event & QLCNIC_MBX_ASYNC_EVENT)
qlcnic_83xx_process_aen(adapter);

3
drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h
View File

@ -368,9 +368,12 @@ irqreturn_t qlcnic_83xx_handle_aen(int, void *);
int qlcnic_83xx_get_port_info(struct qlcnic_adapter *);
void qlcnic_83xx_enable_mbx_intrpt(struct qlcnic_adapter *);
irqreturn_t qlcnic_83xx_clear_legacy_intr(struct qlcnic_adapter *);
irqreturn_t qlcnic_83xx_intr(int, void *);
irqreturn_t qlcnic_83xx_tmp_intr(int, void *);
void qlcnic_83xx_enable_intr(struct qlcnic_adapter *,
struct qlcnic_host_sds_ring *);
void qlcnic_83xx_disable_intr(struct qlcnic_adapter *,
struct qlcnic_host_sds_ring *);
void qlcnic_83xx_check_vf(struct qlcnic_adapter *,
const struct pci_device_id *);
void qlcnic_83xx_process_aen(struct qlcnic_adapter *);

26
drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c
View File

@ -1558,24 +1558,6 @@ skip:
return count;
}
static void qlcnic_83xx_poll_process_aen(struct qlcnic_adapter *adapter)
{
unsigned long flags;
u32 mask, resp, event;
spin_lock_irqsave(&adapter->ahw->mbx_lock, flags);
resp = QLCRDX(adapter->ahw, QLCNIC_FW_MBX_CTRL);
if (!(resp & QLCNIC_SET_OWNER))
goto out;
event = readl(QLCNIC_MBX_FW(adapter->ahw, 0));
if (event & QLCNIC_MBX_ASYNC_EVENT)
qlcnic_83xx_process_aen(adapter);
out:
mask = QLCRDX(adapter->ahw, QLCNIC_DEF_INT_MASK);
writel(0, adapter->ahw->pci_base0 + mask);
spin_unlock_irqrestore(&adapter->ahw->mbx_lock, flags);
}
static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
{
int tx_complete;
@ -1589,14 +1571,10 @@ static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
/* tx ring count = 1 */
tx_ring = adapter->tx_ring;
if (!(adapter->flags & QLCNIC_MSIX_ENABLED))
qlcnic_83xx_poll_process_aen(adapter);
tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
if ((work_done < budget) && tx_complete) {
napi_complete(&sds_ring->napi);
if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
qlcnic_83xx_enable_intr(adapter, sds_ring);
}
@ -1653,6 +1631,7 @@ void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
for (ring = 0; ring < adapter->max_sds_rings; ring++) {
sds_ring = &recv_ctx->sds_rings[ring];
napi_enable(&sds_ring->napi);
if (adapter->flags & QLCNIC_MSIX_ENABLED)
qlcnic_83xx_enable_intr(adapter, sds_ring);
}
@ -1677,7 +1656,8 @@ void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
for (ring = 0; ring < adapter->max_sds_rings; ring++) {
sds_ring = &recv_ctx->sds_rings[ring];
writel(1, sds_ring->crb_intr_mask);
if (adapter->flags & QLCNIC_MSIX_ENABLED)
qlcnic_83xx_disable_intr(adapter, sds_ring);
napi_synchronize(&sds_ring->napi);
napi_disable(&sds_ring->napi);
}

11
drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c
View File

@ -1269,12 +1269,18 @@ qlcnic_request_irq(struct qlcnic_adapter *adapter)
handler = qlcnic_msi_intr;
else {
flags |= IRQF_SHARED;
if (qlcnic_82xx_check(adapter))
handler = qlcnic_intr;
else
handler = qlcnic_83xx_intr;
}
}
adapter->irq = netdev->irq;
if (adapter->ahw->diag_test != QLCNIC_LOOPBACK_TEST) {
if (qlcnic_82xx_check(adapter) ||
(qlcnic_83xx_check(adapter) &&
(adapter->flags & QLCNIC_MSIX_ENABLED))) {
for (ring = 0; ring < adapter->max_sds_rings; ring++) {
sds_ring = &recv_ctx->sds_rings[ring];
snprintf(sds_ring->name, sizeof(int) + IFNAMSIZ,
@ -1284,6 +1290,7 @@ qlcnic_request_irq(struct qlcnic_adapter *adapter)
if (err)
return err;
}
}
if (qlcnic_83xx_check(adapter) &&
(adapter->flags & QLCNIC_MSIX_ENABLED)) {
handler = qlcnic_msix_tx_intr;
@ -1313,10 +1320,14 @@ qlcnic_free_irq(struct qlcnic_adapter *adapter)
struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
if (adapter->ahw->diag_test != QLCNIC_LOOPBACK_TEST) {
if (qlcnic_82xx_check(adapter) ||
(qlcnic_83xx_check(adapter) &&
(adapter->flags & QLCNIC_MSIX_ENABLED))) {
for (ring = 0; ring < adapter->max_sds_rings; ring++) {
sds_ring = &recv_ctx->sds_rings[ring];
free_irq(sds_ring->irq, sds_ring);
}
}
if (qlcnic_83xx_check(adapter)) {
for (ring = 0; ring < adapter->max_drv_tx_rings;
ring++) {