diff options
| -rw-r--r-- | drivers/ata/libata-sff.c | 404 |
1 files changed, 302 insertions, 102 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 93cc9678216..d48e1544a0b 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -627,75 +627,266 @@ ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int return probe_ent; } -static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, - struct ata_port_info **port, int port_mask) +/** + * ata_pci_init_bmdma - acquire PCI BMDMA resources and init ATA host + * @host: target ATA host + * + * Acquire PCI BMDMA resources and initialize @host accordingly. + * + * LOCKING: + * Inherited from calling layer (may sleep). + * + * RETURNS: + * 0 on success, -errno otherwise. + */ +static int ata_pci_init_bmdma(struct ata_host *host) { - struct ata_probe_ent *probe_ent; - void __iomem *iomap[5] = { }, *bmdma; + struct device *gdev = host->dev; + struct pci_dev *pdev = to_pci_dev(gdev); + int i, rc; - if (port_mask & ATA_PORT_PRIMARY) { - iomap[0] = devm_ioport_map(&pdev->dev, ATA_PRIMARY_CMD, 8); - iomap[1] = devm_ioport_map(&pdev->dev, ATA_PRIMARY_CTL, 1); - if (!iomap[0] || !iomap[1]) - return NULL; + /* TODO: If we get no DMA mask we should fall back to PIO */ + rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); + if (rc) + return rc; + rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); + if (rc) + return rc; + + /* request and iomap DMA region */ + rc = pcim_iomap_regions(pdev, 1 << 4, DRV_NAME); + if (rc) { + dev_printk(KERN_ERR, gdev, "failed to request/iomap BAR4\n"); + return -ENOMEM; } + host->iomap = pcim_iomap_table(pdev); - if (port_mask & ATA_PORT_SECONDARY) { - iomap[2] = devm_ioport_map(&pdev->dev, ATA_SECONDARY_CMD, 8); - iomap[3] = devm_ioport_map(&pdev->dev, ATA_SECONDARY_CTL, 1); - if (!iomap[2] || !iomap[3]) - return NULL; + for (i = 0; i < 2; i++) { + struct ata_port *ap = host->ports[i]; + struct ata_ioports *ioaddr = &ap->ioaddr; + void __iomem *bmdma = host->iomap[4] + 8 * i; + + if (ata_port_is_dummy(ap)) + continue; + + ioaddr->bmdma_addr = bmdma; + if ((!(ap->flags & ATA_FLAG_IGN_SIMPLEX)) && + (ioread8(bmdma + 2) & 0x80)) + host->flags |= ATA_HOST_SIMPLEX; } - bmdma = pcim_iomap(pdev, 4, 16); /* may fail */ + return 0; +} - /* alloc and init probe_ent */ - probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]); - if (!probe_ent) - return NULL; +struct ata_legacy_devres { + unsigned int mask; + unsigned long cmd_port[2]; + void __iomem * cmd_addr[2]; + void __iomem * ctl_addr[2]; + unsigned int irq[2]; + void * irq_dev_id[2]; +}; - probe_ent->n_ports = 2; - probe_ent->irq_flags = IRQF_SHARED; +static void ata_legacy_free_irqs(struct ata_legacy_devres *legacy_dr) +{ + int i; - if (port_mask & ATA_PORT_PRIMARY) { - probe_ent->irq = ATA_PRIMARY_IRQ(pdev); - probe_ent->port[0].cmd_addr = iomap[0]; - probe_ent->port[0].altstatus_addr = - probe_ent->port[0].ctl_addr = iomap[1]; - if (bmdma) { - probe_ent->port[0].bmdma_addr = bmdma; - if ((!(port[0]->flags & ATA_FLAG_IGN_SIMPLEX)) && - (ioread8(bmdma + 2) & 0x80)) - probe_ent->_host_flags |= ATA_HOST_SIMPLEX; - } - ata_std_ports(&probe_ent->port[0]); - } else - probe_ent->dummy_port_mask |= ATA_PORT_PRIMARY; + for (i = 0; i < 2; i++) { + if (!legacy_dr->irq[i]) + continue; + + free_irq(legacy_dr->irq[i], legacy_dr->irq_dev_id[i]); + legacy_dr->irq[i] = 0; + legacy_dr->irq_dev_id[i] = NULL; + } +} + +static void ata_legacy_release(struct device *gdev, void *res) +{ + struct ata_legacy_devres *this = res; + int i; + + ata_legacy_free_irqs(this); + + for (i = 0; i < 2; i++) { + if (this->cmd_addr[i]) + ioport_unmap(this->cmd_addr[i]); + if (this->ctl_addr[i]) + ioport_unmap(this->ctl_addr[i]); + if (this->cmd_port[i]) + release_region(this->cmd_port[i], 8); + } +} + +static int ata_init_legacy_port(struct ata_port *ap, + struct ata_legacy_devres *legacy_dr) +{ + struct ata_host *host = ap->host; + int port_no = ap->port_no; + unsigned long cmd_port, ctl_port; + + if (port_no == 0) { + cmd_port = ATA_PRIMARY_CMD; + ctl_port = ATA_PRIMARY_CTL; + } else { + cmd_port = ATA_SECONDARY_CMD; + ctl_port = ATA_SECONDARY_CTL; + } + + /* request cmd_port */ + if (request_region(cmd_port, 8, "libata")) + legacy_dr->cmd_port[port_no] = cmd_port; + else { + dev_printk(KERN_WARNING, host->dev, + "0x%0lX IDE port busy\n", cmd_port); + return -EBUSY; + } + + /* iomap cmd and ctl ports */ + legacy_dr->cmd_addr[port_no] = ioport_map(cmd_port, 8); + legacy_dr->ctl_addr[port_no] = ioport_map(ctl_port, 1); + if (!legacy_dr->cmd_addr[port_no] || !legacy_dr->ctl_addr[port_no]) + return -ENOMEM; + + /* init IO addresses */ + ap->ioaddr.cmd_addr = legacy_dr->cmd_addr[port_no]; + ap->ioaddr.altstatus_addr = legacy_dr->ctl_addr[port_no]; + ap->ioaddr.ctl_addr = legacy_dr->ctl_addr[port_no]; + ata_std_ports(&ap->ioaddr); + + return 0; +} + +/** + * ata_init_legacy_host - acquire legacy ATA resources and init ATA host + * @host: target ATA host + * @legacy_mask: out parameter, mask indicating ports is in legacy mode + * @was_busy: out parameter, indicates whether any port was busy + * + * Acquire legacy ATA resources for ports. + * + * LOCKING: + * Inherited from calling layer (may sleep). + * + * RETURNS: + * 0 on success, -errno otherwise. + */ +static int ata_init_legacy_host(struct ata_host *host, + unsigned int *legacy_mask, int *was_busy) +{ + struct device *gdev = host->dev; + struct ata_legacy_devres *legacy_dr; + int i, rc; + + if (!devres_open_group(gdev, NULL, GFP_KERNEL)) + return -ENOMEM; + + rc = -ENOMEM; + legacy_dr = devres_alloc(ata_legacy_release, sizeof(*legacy_dr), + GFP_KERNEL); + if (!legacy_dr) + goto err_out; + devres_add(gdev, legacy_dr); + + for (i = 0; i < 2; i++) { + *legacy_mask &= ~(1 << i); + rc = ata_init_legacy_port(host->ports[i], legacy_dr); + if (rc == 0) + legacy_dr->mask |= 1 << i; + else if (rc == -EBUSY) + (*was_busy)++; + } + + if (!legacy_dr->mask) + return -EBUSY; + + for (i = 0; i < 2; i++) + if (!(legacy_dr->mask & (1 << i))) + host->ports[i]->ops = &ata_dummy_port_ops; - if (port_mask & ATA_PORT_SECONDARY) { - if (probe_ent->irq) - probe_ent->irq2 = ATA_SECONDARY_IRQ(pdev); + *legacy_mask |= legacy_dr->mask; + + devres_remove_group(gdev, NULL); + return 0; + + err_out: + devres_release_group(gdev, NULL); + return rc; +} + +/** + * ata_request_legacy_irqs - request legacy ATA IRQs + * @host: target ATA host + * @handler: array of IRQ handlers + * @irq_flags: array of IRQ flags + * @dev_id: array of IRQ dev_ids + * + * Request legacy IRQs for non-dummy legacy ports in @host. All + * IRQ parameters are passed as array to allow ports to have + * separate IRQ handlers. + * + * LOCKING: + * Inherited from calling layer (may sleep). + * + * RETURNS: + * 0 on success, -errno otherwise. + */ +static int ata_request_legacy_irqs(struct ata_host *host, + irq_handler_t const *handler, + const unsigned int *irq_flags, + void * const *dev_id) +{ + struct device *gdev = host->dev; + struct ata_legacy_devres *legacy_dr; + int i, rc; + + legacy_dr = devres_find(host->dev, ata_legacy_release, NULL, NULL); + BUG_ON(!legacy_dr); + + for (i = 0; i < 2; i++) { + unsigned int irq; + + /* FIXME: ATA_*_IRQ() should take generic device not pci_dev */ + if (i == 0) + irq = ATA_PRIMARY_IRQ(to_pci_dev(gdev)); else - probe_ent->irq = ATA_SECONDARY_IRQ(pdev); - probe_ent->port[1].cmd_addr = iomap[2]; - probe_ent->port[1].altstatus_addr = - probe_ent->port[1].ctl_addr = iomap[3]; - if (bmdma) { - probe_ent->port[1].bmdma_addr = bmdma + 8; - if ((!(port[1]->flags & ATA_FLAG_IGN_SIMPLEX)) && - (ioread8(bmdma + 10) & 0x80)) - probe_ent->_host_flags |= ATA_HOST_SIMPLEX; + irq = ATA_SECONDARY_IRQ(to_pci_dev(gdev)); + + if (!(legacy_dr->mask & (1 << i))) + continue; + + if (!handler[i]) { + dev_printk(KERN_ERR, gdev, + "NULL handler specified for port %d\n", i); + rc = -EINVAL; + goto err_out; } - ata_std_ports(&probe_ent->port[1]); - /* FIXME: could be pointing to stack area; must copy */ - probe_ent->pinfo2 = port[1]; - } else - probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY; + rc = request_irq(irq, handler[i], irq_flags[i], DRV_NAME, + dev_id[i]); + if (rc) { + dev_printk(KERN_ERR, gdev, + "irq %u request failed (errno=%d)\n", irq, rc); + goto err_out; + } - return probe_ent; -} + /* record irq allocation in legacy_dr */ + legacy_dr->irq[i] = irq; + legacy_dr->irq_dev_id[i] = dev_id[i]; + + /* only used to print info */ + if (i == 0) + host->irq = irq; + else + host->irq2 = irq; + } + + return 0; + err_out: + ata_legacy_free_irqs(legacy_dr); + return rc; +} /** * ata_pci_init_one - Initialize/register PCI IDE host controller @@ -727,7 +918,8 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, { struct device *dev = &pdev->dev; struct ata_probe_ent *probe_ent = NULL; - struct ata_port_info *port[2]; + struct ata_host *host = NULL; + const struct ata_port_info *port[2]; u8 mask; unsigned int legacy_mode = 0; int rc; @@ -783,66 +975,74 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, pcim_pin_device(pdev); goto err_out; } + + /* TODO: If we get no DMA mask we should fall back to PIO */ + rc = pci_set_dma_mask(pdev, ATA_DMA_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 { - /* Deal with combined mode hack. This side of the logic all - goes away once the combined mode hack is killed in 2.6.21 */ - if (!devm_request_region(dev, ATA_PRIMARY_CMD, 8, "libata")) { - pcim_pin_device(pdev); - printk(KERN_WARNING "ata: 0x%0X IDE port busy\n", - ATA_PRIMARY_CMD); - } else - legacy_mode |= ATA_PORT_PRIMARY; + int was_busy = 0; + + rc = -ENOMEM; + host = ata_host_alloc_pinfo(dev, port, 2); + if (!host) + goto err_out; - if (!devm_request_region(dev, ATA_SECONDARY_CMD, 8, "libata")) { + rc = ata_init_legacy_host(host, &legacy_mode, &was_busy); + if (was_busy) pcim_pin_device(pdev); - printk(KERN_WARNING "ata: 0x%X IDE port busy\n", - ATA_SECONDARY_CMD); - } else - legacy_mode |= ATA_PORT_SECONDARY; - - if (legacy_mode & ATA_PORT_PRIMARY) - pci_request_region(pdev, 1, DRV_NAME); - if (legacy_mode & ATA_PORT_SECONDARY) - pci_request_region(pdev, 3, DRV_NAME); - /* If there is a DMA resource, allocate it */ - pci_request_region(pdev, 4, DRV_NAME); - } + if (rc) + goto err_out; - /* we have legacy mode, but all ports are unavailable */ - if (legacy_mode == (1 << 3)) { - rc = -EBUSY; - goto err_out; - } + /* request respective PCI regions, may fail */ + rc = pci_request_region(pdev, 1, DRV_NAME); + rc = pci_request_region(pdev, 3, DRV_NAME); - /* TODO: If we get no DMA mask we should fall back to PIO */ - rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); - if (rc) - goto err_out; - rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); - if (rc) - goto err_out; + /* init bmdma */ + ata_pci_init_bmdma(host); + pci_set_master(pdev); + } if (legacy_mode) { - probe_ent = ata_pci_init_legacy_port(pdev, port, legacy_mode); + 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, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY); + 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, port, ATA_PORT_PRIMARY); - } - if (!probe_ent) { - rc = -ENOMEM; - goto err_out; - } + probe_ent = ata_pci_init_native_mode(pdev, (struct ata_port_info **)port, ATA_PORT_PRIMARY); - pci_set_master(pdev); + if (!probe_ent) { + rc = -ENOMEM; + goto err_out; + } - if (!ata_device_add(probe_ent)) { - rc = -ENODEV; - goto err_out; - } + if (!ata_device_add(probe_ent)) { + rc = -ENODEV; + goto err_out; + } - devm_kfree(dev, probe_ent); + devm_kfree(dev, probe_ent); + } devres_remove_group(dev, NULL); return 0; |