static int ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
{
int bar;
unsigned long off;
/* map the memory mapped i/o registers */
hw->mmio_vaddr = pci_iomap(pdev, 1, 0);
if (hw->mmio_vaddr == NULL) {
dev_err(&pdev->dev, "Error mapping mmio\n");
goto out;
}
/* map the adapter shared memory region */
if (pdev->subsystem_device == 0x00E4) {
bar = 5;
/* Last 8k is reserved for CCBs */
off = pci_resource_len(pdev, bar) - 0x2000;
} else {
bar = 2;
off = 0;
}
hw->ram_vaddr = pci_iomap_range(pdev, bar, off, max_ccb * ILOHW_CCB_SZ);
if (hw->ram_vaddr == NULL) {
dev_err(&pdev->dev, "Error mapping shared mem\n");
goto mmio_free;
}
/* map the doorbell aperture */
hw->db_vaddr = pci_iomap(pdev, 3, max_ccb * ONE_DB_SIZE);
if (hw->db_vaddr == NULL) {
dev_err(&pdev->dev, "Error mapping doorbell\n");
goto ram_free;
}
return 0;
ram_free:
pci_iounmap(pdev, hw->ram_vaddr);
mmio_free:
pci_iounmap(pdev, hw->mmio_vaddr);
out:
return -ENOMEM;
}
/**
* pci_iomap - create a virtual mapping cookie for a PCI BAR
* @dev: PCI device that owns the BAR
* @bar: BAR number
* @maxlen: length of the memory to map
*
* Using this function you will get a __iomem address to your device BAR.
* You can access it using ioread*() and iowrite*(). These functions hide
* the details if this is a MMIO or PIO address space and will just do what
* you expect from them in the correct way.
*
* @maxlen specifies the maximum length to map. If you want to get access to
* the complete BAR without checking for its length first, pass %0 here.
* */
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
return pci_iomap_range(dev, bar, 0, maxlen);
}