diff options
Diffstat (limited to 'driver/int.c')
| -rw-r--r-- | driver/int.c | 71 |
1 files changed, 17 insertions, 54 deletions
diff --git a/driver/int.c b/driver/int.c index 285aa0e..5dbcb7f 100644 --- a/driver/int.c +++ b/driver/int.c @@ -162,6 +162,10 @@ int pcidriver_probe_irq(pcidriver_privdata_t *privdata) return 0; } + /* Enable interrupts using MSI mode */ + if (!pci_enable_msi(privdata->pdev)) + privdata->msi_mode = 1; + /* register interrupt handler */ if ((err = request_irq(privdata->pdev->irq, pcidriver_irq_handler, MODNAME, privdata)) != 0) { mod_info("Error registering the interrupt handler. Disabling interrupts for this device\n"); @@ -184,6 +188,11 @@ void pcidriver_remove_irq(pcidriver_privdata_t *privdata) /* Release the IRQ handler */ if (privdata->irq_enabled != 0) free_irq(privdata->pdev->irq, privdata); + + if (privdata->msi_mode) { + pci_disable_msi(privdata->pdev); + privdata->msi_mode = 0; + } pcidriver_irq_unmap_bars(privdata); } @@ -208,29 +217,6 @@ void pcidriver_irq_unmap_bars(pcidriver_privdata_t *privdata) /** * - * Acknowledge the interrupt by ACKing the interrupt generator. - * - * @returns true if the channel was acknowledged and the interrupt handler is done - * - */ -static bool check_acknowlegde_channel(pcidriver_privdata_t *privdata, int interrupt, - int channel, volatile unsigned int *bar) -{ - if (!(bar[ABB_INT_STAT] & interrupt)) - return false; - - bar[ABB_INT_ENABLE] &= !interrupt; - if (interrupt == ABB_INT_IG) - bar[ABB_IG_CTRL] = ABB_IG_ACK; - - /* Wake up the waiting loop in ioctl.c:ioctl_wait_interrupt() */ - atomic_inc(&(privdata->irq_outstanding[channel])); - wake_up_interruptible(&(privdata->irq_queues[channel])); - return true; -} - -/** - * * Acknowledges the receival of an interrupt to the card. * * @returns true if the card was acknowledget @@ -241,38 +227,15 @@ static bool check_acknowlegde_channel(pcidriver_privdata_t *privdata, int interr */ static bool pcidriver_irq_acknowledge(pcidriver_privdata_t *privdata) { - volatile unsigned int *bar; + int channel = 0; +// volatile unsigned int *bar; +// bar = privdata->bars_kmapped[0]; +// mod_info_dbg("interrupt registers. ISR: %x, IER: %x\n", bar[ABB_INT_STAT], bar[ABB_INT_ENABLE]); - /* TODO: add subvendor / subsystem ids */ - /* FIXME: guillermo: which ones? all? */ - - /* Test if we have to handle this interrupt */ - return false; // The device is not supported any more - - /* Acknowledge the device */ - /* this is for ABB / wenxue DMA engine */ - bar = privdata->bars_kmapped[0]; - - mod_info_dbg("interrupt registers. ISR: %x, IER: %x\n", bar[ABB_INT_STAT], bar[ABB_INT_ENABLE]); - - if (check_acknowlegde_channel(privdata, ABB_INT_CH0, ABB_IRQ_CH0, bar)) - return true; - - if (check_acknowlegde_channel(privdata, ABB_INT_CH1, ABB_IRQ_CH1, bar)) - return true; - - if (check_acknowlegde_channel(privdata, ABB_INT_IG, ABB_IRQ_IG, bar)) - return true; - - if (check_acknowlegde_channel(privdata, ABB_INT_CH0_TIMEOUT, ABB_IRQ_CH0, bar)) - return true; - - if (check_acknowlegde_channel(privdata, ABB_INT_CH1_TIMEOUT, ABB_IRQ_CH1, bar)) - return true; - - mod_info_dbg("err: interrupt registers. ISR: %x, IER: %x\n", bar[ ABB_INT_STAT ], bar[ ABB_INT_ENABLE ] ); - - return false; + atomic_inc(&(privdata->irq_outstanding[channel])); + wake_up_interruptible(&(privdata->irq_queues[channel])); + + return true; } /** |