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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
Jeff Garzik
parent
0f834de3ea
commit
d491b27b19
@ -6726,6 +6726,7 @@ EXPORT_SYMBOL_GPL(ata_timing_merge);
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#ifdef CONFIG_PCI
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EXPORT_SYMBOL_GPL(pci_test_config_bits);
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EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
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EXPORT_SYMBOL_GPL(ata_pci_init_native_host);
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EXPORT_SYMBOL_GPL(ata_pci_init_one);
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EXPORT_SYMBOL_GPL(ata_pci_remove_one);
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#ifdef CONFIG_PM
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@ -678,6 +678,70 @@ static int ata_pci_init_bmdma(struct ata_host *host)
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return 0;
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}
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/**
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* ata_pci_init_native_host - acquire native ATA resources and init host
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* @host: target ATA host
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* @port_mask: ports to consider
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*
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* Acquire native PCI ATA resources for @host and initialize
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* @host accordoingly.
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*
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* LOCKING:
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* Inherited from calling layer (may sleep).
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*
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* RETURNS:
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* 0 on success, -errno otherwise.
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*/
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int ata_pci_init_native_host(struct ata_host *host, unsigned int port_mask)
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{
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struct device *gdev = host->dev;
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struct pci_dev *pdev = to_pci_dev(gdev);
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int i, rc;
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/* Discard disabled ports. Some controllers show their unused
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* channels this way. Disabled ports are made dummy.
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*/
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for (i = 0; i < 2; i++) {
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if ((port_mask & (1 << i)) && !ata_resources_present(pdev, i)) {
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host->ports[i]->ops = &ata_dummy_port_ops;
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port_mask &= ~(1 << i);
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}
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}
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if (!port_mask) {
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dev_printk(KERN_ERR, gdev, "no available port\n");
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return -ENODEV;
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}
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/* request, iomap BARs and init port addresses accordingly */
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for (i = 0; i < 2; i++) {
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struct ata_port *ap = host->ports[i];
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int base = i * 2;
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void __iomem * const *iomap;
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if (!(port_mask & (1 << i)))
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continue;
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rc = pcim_iomap_regions(pdev, 0x3 << base, DRV_NAME);
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if (rc) {
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dev_printk(KERN_ERR, gdev, "failed to request/iomap "
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"BARs for port %d (errno=%d)\n", i, rc);
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if (rc == -EBUSY)
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pcim_pin_device(pdev);
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return rc;
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}
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host->iomap = iomap = pcim_iomap_table(pdev);
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ap->ioaddr.cmd_addr = iomap[base];
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ap->ioaddr.altstatus_addr =
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ap->ioaddr.ctl_addr = (void __iomem *)
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((unsigned long)iomap[base + 1] | ATA_PCI_CTL_OFS);
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ata_std_ports(&ap->ioaddr);
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}
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return 0;
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}
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struct ata_legacy_devres {
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unsigned int mask;
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unsigned long cmd_port[2];
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@ -917,7 +981,6 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
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unsigned int n_ports)
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{
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struct device *dev = &pdev->dev;
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struct ata_probe_ent *probe_ent = NULL;
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struct ata_host *host = NULL;
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const struct ata_port_info *port[2];
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u8 mask;
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@ -969,30 +1032,28 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
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#endif
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}
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if (!legacy_mode) {
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rc = pci_request_regions(pdev, DRV_NAME);
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if (rc) {
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pcim_pin_device(pdev);
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/* alloc and init host */
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host = ata_host_alloc_pinfo(dev, port, 2);
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if (!host) {
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dev_printk(KERN_ERR, &pdev->dev,
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"failed to allocate ATA host\n");
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rc = -ENOMEM;
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goto err_out;
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}
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/* TODO: If we get no DMA mask we should fall back to PIO */
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rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
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if (rc)
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goto err_out;
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rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
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if (rc)
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goto err_out;
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if (!legacy_mode) {
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unsigned int port_mask;
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pci_set_master(pdev);
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port_mask = ATA_PORT_PRIMARY;
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if (n_ports > 1)
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port_mask |= ATA_PORT_SECONDARY;
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rc = ata_pci_init_native_host(host, port_mask);
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if (rc)
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goto err_out;
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} else {
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int was_busy = 0;
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rc = -ENOMEM;
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host = ata_host_alloc_pinfo(dev, port, 2);
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if (!host)
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goto err_out;
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rc = ata_init_legacy_host(host, &legacy_mode, &was_busy);
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if (was_busy)
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pcim_pin_device(pdev);
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@ -1002,47 +1063,37 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
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/* request respective PCI regions, may fail */
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rc = pci_request_region(pdev, 1, DRV_NAME);
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rc = pci_request_region(pdev, 3, DRV_NAME);
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/* init bmdma */
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ata_pci_init_bmdma(host);
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pci_set_master(pdev);
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}
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if (legacy_mode) {
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/* init BMDMA, may fail */
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ata_pci_init_bmdma(host);
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pci_set_master(pdev);
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/* start host and request IRQ */
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rc = ata_host_start(host);
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if (rc)
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goto err_out;
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if (!legacy_mode)
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rc = devm_request_irq(dev, pdev->irq,
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port_info[0]->port_ops->irq_handler,
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IRQF_SHARED, DRV_NAME, host);
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else {
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irq_handler_t handler[2] = { host->ops->irq_handler,
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host->ops->irq_handler };
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unsigned int irq_flags[2] = { IRQF_SHARED, IRQF_SHARED };
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void *dev_id[2] = { host, host };
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rc = ata_host_start(host);
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if (rc)
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goto err_out;
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rc = ata_request_legacy_irqs(host, handler, irq_flags, dev_id);
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}
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if (rc)
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goto err_out;
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/* register */
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rc = ata_host_register(host, port_info[0]->sht);
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if (rc)
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goto err_out;
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} else {
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if (n_ports == 2)
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probe_ent = ata_pci_init_native_mode(pdev, (struct ata_port_info **)port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
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else
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probe_ent = ata_pci_init_native_mode(pdev, (struct ata_port_info **)port, ATA_PORT_PRIMARY);
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if (!probe_ent) {
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rc = -ENOMEM;
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goto err_out;
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}
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if (!ata_device_add(probe_ent)) {
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rc = -ENODEV;
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goto err_out;
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}
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devm_kfree(dev, probe_ent);
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}
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devres_remove_group(dev, NULL);
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return 0;
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@ -892,6 +892,8 @@ struct pci_bits {
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extern struct ata_probe_ent *
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ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
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extern int ata_pci_init_native_host(struct ata_host *host,
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unsigned int port_mask);
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extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
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extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
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#endif /* CONFIG_PCI */
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