libata: convert native PCI host handling to new init model

Convert native PCI host handling to alloc-init-register model.  New
function ata_pci_init_native_host() follows the new init model and
replaces ata_pci_init_native_mode().  As there are remaining LLD
users, the old function isn't removed yet.

ata_pci_init_one() is reimplemented using the new function and now
fully converted to new init model.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-04-17 23:44:07 +09:00 committed by Jeff Garzik
parent 0f834de3ea
commit d491b27b19
3 changed files with 105 additions and 51 deletions

View file

@ -6726,6 +6726,7 @@ EXPORT_SYMBOL_GPL(ata_timing_merge);
#ifdef CONFIG_PCI
EXPORT_SYMBOL_GPL(pci_test_config_bits);
EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
EXPORT_SYMBOL_GPL(ata_pci_init_native_host);
EXPORT_SYMBOL_GPL(ata_pci_init_one);
EXPORT_SYMBOL_GPL(ata_pci_remove_one);
#ifdef CONFIG_PM

View file

@ -678,6 +678,70 @@ static int ata_pci_init_bmdma(struct ata_host *host)
return 0;
}
/**
* ata_pci_init_native_host - acquire native ATA resources and init host
* @host: target ATA host
* @port_mask: ports to consider
*
* Acquire native PCI ATA resources for @host and initialize
* @host accordoingly.
*
* LOCKING:
* Inherited from calling layer (may sleep).
*
* RETURNS:
* 0 on success, -errno otherwise.
*/
int ata_pci_init_native_host(struct ata_host *host, unsigned int port_mask)
{
struct device *gdev = host->dev;
struct pci_dev *pdev = to_pci_dev(gdev);
int i, rc;
/* Discard disabled ports. Some controllers show their unused
* channels this way. Disabled ports are made dummy.
*/
for (i = 0; i < 2; i++) {
if ((port_mask & (1 << i)) && !ata_resources_present(pdev, i)) {
host->ports[i]->ops = &ata_dummy_port_ops;
port_mask &= ~(1 << i);
}
}
if (!port_mask) {
dev_printk(KERN_ERR, gdev, "no available port\n");
return -ENODEV;
}
/* request, iomap BARs and init port addresses accordingly */
for (i = 0; i < 2; i++) {
struct ata_port *ap = host->ports[i];
int base = i * 2;
void __iomem * const *iomap;
if (!(port_mask & (1 << i)))
continue;
rc = pcim_iomap_regions(pdev, 0x3 << base, DRV_NAME);
if (rc) {
dev_printk(KERN_ERR, gdev, "failed to request/iomap "
"BARs for port %d (errno=%d)\n", i, rc);
if (rc == -EBUSY)
pcim_pin_device(pdev);
return rc;
}
host->iomap = iomap = pcim_iomap_table(pdev);
ap->ioaddr.cmd_addr = iomap[base];
ap->ioaddr.altstatus_addr =
ap->ioaddr.ctl_addr = (void __iomem *)
((unsigned long)iomap[base + 1] | ATA_PCI_CTL_OFS);
ata_std_ports(&ap->ioaddr);
}
return 0;
}
struct ata_legacy_devres {
unsigned int mask;
unsigned long cmd_port[2];
@ -917,7 +981,6 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
unsigned int n_ports)
{
struct device *dev = &pdev->dev;
struct ata_probe_ent *probe_ent = NULL;
struct ata_host *host = NULL;
const struct ata_port_info *port[2];
u8 mask;
@ -943,7 +1006,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
Checking dev->is_enabled is insufficient as this is not set at
boot for the primary video which is BIOS enabled
*/
*/
rc = pcim_enable_device(pdev);
if (rc)
@ -969,30 +1032,28 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
#endif
}
/* alloc and init host */
host = ata_host_alloc_pinfo(dev, port, 2);
if (!host) {
dev_printk(KERN_ERR, &pdev->dev,
"failed to allocate ATA host\n");
rc = -ENOMEM;
goto err_out;
}
if (!legacy_mode) {
rc = pci_request_regions(pdev, DRV_NAME);
if (rc) {
pcim_pin_device(pdev);
goto err_out;
}
unsigned int port_mask;
/* TODO: If we get no DMA mask we should fall back to PIO */
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
port_mask = ATA_PORT_PRIMARY;
if (n_ports > 1)
port_mask |= ATA_PORT_SECONDARY;
rc = ata_pci_init_native_host(host, port_mask);
if (rc)
goto err_out;
rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
goto err_out;
pci_set_master(pdev);
} else {
int was_busy = 0;
rc = -ENOMEM;
host = ata_host_alloc_pinfo(dev, port, 2);
if (!host)
goto err_out;
rc = ata_init_legacy_host(host, &legacy_mode, &was_busy);
if (was_busy)
pcim_pin_device(pdev);
@ -1002,47 +1063,37 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
/* request respective PCI regions, may fail */
rc = pci_request_region(pdev, 1, DRV_NAME);
rc = pci_request_region(pdev, 3, DRV_NAME);
/* init bmdma */
ata_pci_init_bmdma(host);
pci_set_master(pdev);
}
if (legacy_mode) {
/* init BMDMA, may fail */
ata_pci_init_bmdma(host);
pci_set_master(pdev);
/* start host and request IRQ */
rc = ata_host_start(host);
if (rc)
goto err_out;
if (!legacy_mode)
rc = devm_request_irq(dev, pdev->irq,
port_info[0]->port_ops->irq_handler,
IRQF_SHARED, DRV_NAME, host);
else {
irq_handler_t handler[2] = { host->ops->irq_handler,
host->ops->irq_handler };
unsigned int irq_flags[2] = { IRQF_SHARED, IRQF_SHARED };
void *dev_id[2] = { host, host };
rc = ata_host_start(host);
if (rc)
goto err_out;
rc = ata_request_legacy_irqs(host, handler, irq_flags, dev_id);
if (rc)
goto err_out;
rc = ata_host_register(host, port_info[0]->sht);
if (rc)
goto err_out;
} else {
if (n_ports == 2)
probe_ent = ata_pci_init_native_mode(pdev, (struct ata_port_info **)port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
else
probe_ent = ata_pci_init_native_mode(pdev, (struct ata_port_info **)port, ATA_PORT_PRIMARY);
if (!probe_ent) {
rc = -ENOMEM;
goto err_out;
}
if (!ata_device_add(probe_ent)) {
rc = -ENODEV;
goto err_out;
}
devm_kfree(dev, probe_ent);
}
if (rc)
goto err_out;
/* register */
rc = ata_host_register(host, port_info[0]->sht);
if (rc)
goto err_out;
devres_remove_group(dev, NULL);
return 0;

View file

@ -892,6 +892,8 @@ struct pci_bits {
extern struct ata_probe_ent *
ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
extern int ata_pci_init_native_host(struct ata_host *host,
unsigned int port_mask);
extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
#endif /* CONFIG_PCI */