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pci.sh /proc/interrupts and lspci -k, pci.c dev_info

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This commit is contained in:
Ciro Santilli
2017-06-24 10:24:36 +01:00
parent a8e11e6de9
commit b1b2817a68
2 changed files with 23 additions and 2 deletions
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9
kernel_module/pci.c
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@@ -1,4 +1,8 @@
/*
Usage:
/pci.sh
Like every other hardware, we could interact with PCI on x86
using only IO instructions and memory operations.
@@ -140,7 +144,7 @@ static irqreturn_t irq_handler(int irq, void *dev)
devi = *(int *)dev;
if (devi == major) {
irq_status = ioread32(mmio + IO_IRQ_STATUS);
pr_info("interrupt irq = %d dev = %d irq_status = %llx\n",
pr_info("irq_handler irq = %d dev = %d irq_status = %llx\n",
irq, devi, (unsigned long long)irq_status);
/* Must do this ACK, or else the interrupts just keeps firing. */
iowrite32(irq_status, mmio + IO_IRQ_ACK);
@@ -162,7 +166,8 @@ static int pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
u8 val;
pr_info("pci_probe\n");
/* https://stackoverflow.com/questions/31382803/how-does-dev-family-functions-are-useful-while-debugging-kernel/44734857#44734857 */
dev_info(&(dev->dev), "pci_probe\n");
major = register_chrdev(0, CDEV_NAME, &fops);
pdev = dev;
if (pci_enable_device(dev) < 0) {