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-rw-r--r--driver/int.c226
1 files changed, 113 insertions, 113 deletions
diff --git a/driver/int.c b/driver/int.c
index 5dbcb7f..f78c6ec 100644
--- a/driver/int.c
+++ b/driver/int.c
@@ -9,7 +9,7 @@
/*
* Change History:
- *
+ *
* $Log: not supported by cvs2svn $
* Revision 1.7 2008-01-11 10:18:28 marcus
* Modified interrupt mechanism. Added atomic functions and queues, to address race conditions. Removed unused interrupt code.
@@ -60,7 +60,7 @@
/*
* The ID between IRQ_SOURCE in irq_outstanding and the actual source is arbitrary.
- * Therefore, be careful when communicating with multiple implementations.
+ * Therefore, be careful when communicating with multiple implementations.
*/
/* IRQ_SOURCES */
@@ -92,90 +92,90 @@
*/
int pcidriver_probe_irq(pcidriver_privdata_t *privdata)
{
- unsigned char int_pin, int_line;
- unsigned long bar_addr, bar_len, bar_flags;
- int i;
- int err;
-
- for (i = 0; i < 6; i++)
- privdata->bars_kmapped[i] = NULL;
-
- for (i = 0; i < 6; i++) {
- bar_addr = pci_resource_start(privdata->pdev, i);
- bar_len = pci_resource_len(privdata->pdev, i);
- bar_flags = pci_resource_flags(privdata->pdev, i);
-
- /* check if it is a valid BAR, skip if not */
- if ((bar_addr == 0) || (bar_len == 0))
- continue;
-
- /* Skip IO regions (map only mem regions) */
- if (bar_flags & IORESOURCE_IO)
- continue;
-
- /* Check if the region is available */
- if ((err = pci_request_region(privdata->pdev, i, NULL)) != 0) {
- mod_info( "Failed to request BAR memory region.\n" );
- return err;
- }
-
- /* Map it into kernel space. */
- /* For x86 this is just a dereference of the pointer, but that is
- * not portable. So we need to do the portable way. Thanks Joern!
- */
-
- /* respect the cacheable-bility of the region */
- if (bar_flags & IORESOURCE_PREFETCH)
- privdata->bars_kmapped[i] = ioremap(bar_addr, bar_len);
- else
- privdata->bars_kmapped[i] = ioremap_nocache(bar_addr, bar_len);
-
- /* check for error */
- if (privdata->bars_kmapped[i] == NULL) {
- mod_info( "Failed to remap BAR%d into kernel space.\n", i );
- return -EIO;
- }
- }
-
- /* Initialize the interrupt handler for this device */
- /* Initialize the wait queues */
- for (i = 0; i < PCIDRIVER_INT_MAXSOURCES; i++) {
- init_waitqueue_head(&(privdata->irq_queues[i]));
- atomic_set(&(privdata->irq_outstanding[i]), 0);
- }
-
- /* Initialize the irq config */
- if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_PIN, &int_pin)) != 0) {
- /* continue without interrupts */
- int_pin = 0;
- mod_info("Error getting the interrupt pin. Disabling interrupts for this device\n");
- }
-
- /* Disable interrupts and activate them if everything can be set up properly */
- privdata->irq_enabled = 0;
-
- if (int_pin == 0)
- return 0;
-
- if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_LINE, &int_line)) != 0) {
- mod_info("Error getting the interrupt line. Disabling interrupts for this device\n");
- 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");
- return 0;
- }
-
- privdata->irq_enabled = 1;
- mod_info("Registered Interrupt Handler at pin %i, line %i, IRQ %i\n", int_pin, int_line, privdata->pdev->irq );
-
- return 0;
+ unsigned char int_pin, int_line;
+ unsigned long bar_addr, bar_len, bar_flags;
+ int i;
+ int err;
+
+ for (i = 0; i < 6; i++)
+ privdata->bars_kmapped[i] = NULL;
+
+ for (i = 0; i < 6; i++) {
+ bar_addr = pci_resource_start(privdata->pdev, i);
+ bar_len = pci_resource_len(privdata->pdev, i);
+ bar_flags = pci_resource_flags(privdata->pdev, i);
+
+ /* check if it is a valid BAR, skip if not */
+ if ((bar_addr == 0) || (bar_len == 0))
+ continue;
+
+ /* Skip IO regions (map only mem regions) */
+ if (bar_flags & IORESOURCE_IO)
+ continue;
+
+ /* Check if the region is available */
+ if ((err = pci_request_region(privdata->pdev, i, NULL)) != 0) {
+ mod_info( "Failed to request BAR memory region.\n" );
+ return err;
+ }
+
+ /* Map it into kernel space. */
+ /* For x86 this is just a dereference of the pointer, but that is
+ * not portable. So we need to do the portable way. Thanks Joern!
+ */
+
+ /* respect the cacheable-bility of the region */
+ if (bar_flags & IORESOURCE_PREFETCH)
+ privdata->bars_kmapped[i] = ioremap(bar_addr, bar_len);
+ else
+ privdata->bars_kmapped[i] = ioremap_nocache(bar_addr, bar_len);
+
+ /* check for error */
+ if (privdata->bars_kmapped[i] == NULL) {
+ mod_info( "Failed to remap BAR%d into kernel space.\n", i );
+ return -EIO;
+ }
+ }
+
+ /* Initialize the interrupt handler for this device */
+ /* Initialize the wait queues */
+ for (i = 0; i < PCIDRIVER_INT_MAXSOURCES; i++) {
+ init_waitqueue_head(&(privdata->irq_queues[i]));
+ atomic_set(&(privdata->irq_outstanding[i]), 0);
+ }
+
+ /* Initialize the irq config */
+ if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_PIN, &int_pin)) != 0) {
+ /* continue without interrupts */
+ int_pin = 0;
+ mod_info("Error getting the interrupt pin. Disabling interrupts for this device\n");
+ }
+
+ /* Disable interrupts and activate them if everything can be set up properly */
+ privdata->irq_enabled = 0;
+
+ if (int_pin == 0)
+ return 0;
+
+ if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_LINE, &int_line)) != 0) {
+ mod_info("Error getting the interrupt line. Disabling interrupts for this device\n");
+ 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");
+ return 0;
+ }
+
+ privdata->irq_enabled = 1;
+ mod_info("Registered Interrupt Handler at pin %i, line %i, IRQ %i\n", int_pin, int_line, privdata->pdev->irq );
+
+ return 0;
}
/**
@@ -185,16 +185,16 @@ int pcidriver_probe_irq(pcidriver_privdata_t *privdata)
*/
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);
+ /* 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);
}
/**
@@ -204,15 +204,15 @@ void pcidriver_remove_irq(pcidriver_privdata_t *privdata)
*/
void pcidriver_irq_unmap_bars(pcidriver_privdata_t *privdata)
{
- int i;
+ int i;
- for (i = 0; i < 6; i++) {
- if (privdata->bars_kmapped[i] == NULL)
- continue;
+ for (i = 0; i < 6; i++) {
+ if (privdata->bars_kmapped[i] == NULL)
+ continue;
- iounmap((void*)privdata->bars_kmapped[i]);
- pci_release_region(privdata->pdev, i);
- }
+ iounmap((void*)privdata->bars_kmapped[i]);
+ pci_release_region(privdata->pdev, i);
+ }
}
/**
@@ -227,15 +227,15 @@ void pcidriver_irq_unmap_bars(pcidriver_privdata_t *privdata)
*/
static bool pcidriver_irq_acknowledge(pcidriver_privdata_t *privdata)
{
- int channel = 0;
+ 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]);
- atomic_inc(&(privdata->irq_outstanding[channel]));
- wake_up_interruptible(&(privdata->irq_queues[channel]));
-
- return true;
+ atomic_inc(&(privdata->irq_outstanding[channel]));
+ wake_up_interruptible(&(privdata->irq_queues[channel]));
+
+ return true;
}
/**
@@ -248,11 +248,11 @@ static bool pcidriver_irq_acknowledge(pcidriver_privdata_t *privdata)
*/
IRQ_HANDLER_FUNC(pcidriver_irq_handler)
{
- pcidriver_privdata_t *privdata = (pcidriver_privdata_t *)dev_id;
+ pcidriver_privdata_t *privdata = (pcidriver_privdata_t *)dev_id;
- if (!pcidriver_irq_acknowledge(privdata))
- return IRQ_NONE;
+ if (!pcidriver_irq_acknowledge(privdata))
+ return IRQ_NONE;
- privdata->irq_count++;
- return IRQ_HANDLED;
+ privdata->irq_count++;
+ return IRQ_HANDLED;
}
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