}
/**
- * ide_get_or_set_dma_base - setup BMIBA
- * @d: IDE port info
+ * ide_pci_dma_base - setup BMIBA
* @hwif: IDE interface
+ * @d: IDE port info
*
* Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
* Where a device has a partner that is already in DMA mode we check
* and enforce IDE simplex rules.
*/
-static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_hwif_t *hwif)
+unsigned long ide_pci_dma_base(ide_hwif_t *hwif, const struct ide_port_info *d)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
unsigned long dma_base = 0;
out:
return dma_base;
}
+EXPORT_SYMBOL_GPL(ide_pci_dma_base);
+
+/*
+ * Set up BM-DMA capability (PnP BIOS should have done this)
+ */
+int ide_pci_set_master(struct pci_dev *dev, const char *name)
+{
+ u16 pcicmd;
+
+ pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
+
+ if ((pcicmd & PCI_COMMAND_MASTER) == 0) {
+ pci_set_master(dev);
+
+ if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) ||
+ (pcicmd & PCI_COMMAND_MASTER) == 0) {
+ printk(KERN_ERR "%s: error updating PCICMD on %s\n",
+ name, pci_name(dev));
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ide_pci_set_master);
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
* state
*/
-void ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
- u16 pcicmd;
-
- pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
(dev->class & 0x80))) {
- unsigned long dma_base = ide_get_or_set_dma_base(d, hwif);
- if (dma_base && !(pcicmd & PCI_COMMAND_MASTER)) {
- /*
- * Set up BM-DMA capability
- * (PnP BIOS should have done this)
- */
- pci_set_master(dev);
- if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) || !(pcicmd & PCI_COMMAND_MASTER)) {
- printk(KERN_ERR "%s: %s error updating PCICMD\n",
- hwif->name, d->name);
- dma_base = 0;
- }
- }
- if (dma_base) {
- if (d->init_dma)
- d->init_dma(hwif, dma_base);
-
- ide_setup_dma(hwif, dma_base);
- } else {
- printk(KERN_INFO "%s: %s Bus-Master DMA disabled "
- "(BIOS)\n", hwif->name, d->name);
- }
+ unsigned long base = ide_pci_dma_base(hwif, d);
+
+ if (base == 0 || ide_pci_set_master(dev, d->name) < 0)
+ return -1;
+
+ if (hwif->mmio)
+ printk(KERN_INFO " %s: MMIO-DMA\n", hwif->name);
+ else
+ printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx\n",
+ hwif->name, base, base + 7);
+
+ hwif->extra_base = base + (hwif->channel ? 8 : 16);
+
+ if (ide_allocate_dma_engine(hwif))
+ return -1;
+
+ ide_setup_dma(hwif, base);
}
+
+ return 0;
}
#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */