forked from Minki/linux
libata: convert legacy PCI host handling to new init model
Convert legacy PCI host handling to alloc-init-register model. ata_init_legacy_host(), ata_request_legacy_irqs() and ata_pci_init_bmdma() are separated out and follow the new init model. The two legacy handling functions use separate ata_legacy_devres instead of generic devm_* resources. This reduces devres overhead for legacy hosts which was a bit high because it didn't use PCI/iomap merged resoruces. ata_pci_init_one() is rewritten in terms of the aboved functions but native mode handling is still using the old method. Conversion will be completed when native mode handling is updated. 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
f5cda25729
commit
0f834de3ea
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@ -627,75 +627,266 @@ ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int
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return probe_ent;
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}
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static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
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struct ata_port_info **port, int port_mask)
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/**
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* ata_pci_init_bmdma - acquire PCI BMDMA resources and init ATA host
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* @host: target ATA host
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*
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* Acquire PCI BMDMA resources and initialize @host accordingly.
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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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static int ata_pci_init_bmdma(struct ata_host *host)
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{
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struct ata_probe_ent *probe_ent;
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void __iomem *iomap[5] = { }, *bmdma;
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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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if (port_mask & ATA_PORT_PRIMARY) {
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iomap[0] = devm_ioport_map(&pdev->dev, ATA_PRIMARY_CMD, 8);
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iomap[1] = devm_ioport_map(&pdev->dev, ATA_PRIMARY_CTL, 1);
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if (!iomap[0] || !iomap[1])
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return NULL;
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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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return rc;
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rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
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if (rc)
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return rc;
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/* request and iomap DMA region */
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rc = pcim_iomap_regions(pdev, 1 << 4, DRV_NAME);
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if (rc) {
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dev_printk(KERN_ERR, gdev, "failed to request/iomap BAR4\n");
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return -ENOMEM;
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}
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host->iomap = pcim_iomap_table(pdev);
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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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struct ata_ioports *ioaddr = &ap->ioaddr;
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void __iomem *bmdma = host->iomap[4] + 8 * i;
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if (ata_port_is_dummy(ap))
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continue;
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ioaddr->bmdma_addr = bmdma;
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if ((!(ap->flags & ATA_FLAG_IGN_SIMPLEX)) &&
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(ioread8(bmdma + 2) & 0x80))
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host->flags |= ATA_HOST_SIMPLEX;
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}
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if (port_mask & ATA_PORT_SECONDARY) {
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iomap[2] = devm_ioport_map(&pdev->dev, ATA_SECONDARY_CMD, 8);
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iomap[3] = devm_ioport_map(&pdev->dev, ATA_SECONDARY_CTL, 1);
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if (!iomap[2] || !iomap[3])
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return NULL;
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}
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bmdma = pcim_iomap(pdev, 4, 16); /* may fail */
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/* alloc and init probe_ent */
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probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
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if (!probe_ent)
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return NULL;
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probe_ent->n_ports = 2;
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probe_ent->irq_flags = IRQF_SHARED;
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if (port_mask & ATA_PORT_PRIMARY) {
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probe_ent->irq = ATA_PRIMARY_IRQ(pdev);
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probe_ent->port[0].cmd_addr = iomap[0];
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probe_ent->port[0].altstatus_addr =
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probe_ent->port[0].ctl_addr = iomap[1];
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if (bmdma) {
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probe_ent->port[0].bmdma_addr = bmdma;
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if ((!(port[0]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
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(ioread8(bmdma + 2) & 0x80))
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probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
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}
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ata_std_ports(&probe_ent->port[0]);
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} else
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probe_ent->dummy_port_mask |= ATA_PORT_PRIMARY;
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if (port_mask & ATA_PORT_SECONDARY) {
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if (probe_ent->irq)
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probe_ent->irq2 = ATA_SECONDARY_IRQ(pdev);
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else
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probe_ent->irq = ATA_SECONDARY_IRQ(pdev);
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probe_ent->port[1].cmd_addr = iomap[2];
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probe_ent->port[1].altstatus_addr =
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probe_ent->port[1].ctl_addr = iomap[3];
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if (bmdma) {
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probe_ent->port[1].bmdma_addr = bmdma + 8;
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if ((!(port[1]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
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(ioread8(bmdma + 10) & 0x80))
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probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
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}
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ata_std_ports(&probe_ent->port[1]);
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/* FIXME: could be pointing to stack area; must copy */
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probe_ent->pinfo2 = port[1];
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} else
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probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY;
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return probe_ent;
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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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void __iomem * cmd_addr[2];
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void __iomem * ctl_addr[2];
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unsigned int irq[2];
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void * irq_dev_id[2];
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};
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static void ata_legacy_free_irqs(struct ata_legacy_devres *legacy_dr)
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{
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int i;
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for (i = 0; i < 2; i++) {
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if (!legacy_dr->irq[i])
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continue;
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free_irq(legacy_dr->irq[i], legacy_dr->irq_dev_id[i]);
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legacy_dr->irq[i] = 0;
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legacy_dr->irq_dev_id[i] = NULL;
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}
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}
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static void ata_legacy_release(struct device *gdev, void *res)
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{
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struct ata_legacy_devres *this = res;
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int i;
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ata_legacy_free_irqs(this);
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for (i = 0; i < 2; i++) {
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if (this->cmd_addr[i])
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ioport_unmap(this->cmd_addr[i]);
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if (this->ctl_addr[i])
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ioport_unmap(this->ctl_addr[i]);
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if (this->cmd_port[i])
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release_region(this->cmd_port[i], 8);
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}
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}
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static int ata_init_legacy_port(struct ata_port *ap,
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struct ata_legacy_devres *legacy_dr)
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{
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struct ata_host *host = ap->host;
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int port_no = ap->port_no;
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unsigned long cmd_port, ctl_port;
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if (port_no == 0) {
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cmd_port = ATA_PRIMARY_CMD;
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ctl_port = ATA_PRIMARY_CTL;
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} else {
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cmd_port = ATA_SECONDARY_CMD;
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ctl_port = ATA_SECONDARY_CTL;
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}
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/* request cmd_port */
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if (request_region(cmd_port, 8, "libata"))
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legacy_dr->cmd_port[port_no] = cmd_port;
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else {
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dev_printk(KERN_WARNING, host->dev,
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"0x%0lX IDE port busy\n", cmd_port);
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return -EBUSY;
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}
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/* iomap cmd and ctl ports */
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legacy_dr->cmd_addr[port_no] = ioport_map(cmd_port, 8);
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legacy_dr->ctl_addr[port_no] = ioport_map(ctl_port, 1);
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if (!legacy_dr->cmd_addr[port_no] || !legacy_dr->ctl_addr[port_no])
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return -ENOMEM;
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/* init IO addresses */
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ap->ioaddr.cmd_addr = legacy_dr->cmd_addr[port_no];
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ap->ioaddr.altstatus_addr = legacy_dr->ctl_addr[port_no];
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ap->ioaddr.ctl_addr = legacy_dr->ctl_addr[port_no];
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ata_std_ports(&ap->ioaddr);
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return 0;
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}
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/**
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* ata_init_legacy_host - acquire legacy ATA resources and init ATA host
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* @host: target ATA host
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* @legacy_mask: out parameter, mask indicating ports is in legacy mode
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* @was_busy: out parameter, indicates whether any port was busy
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*
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* Acquire legacy ATA resources for ports.
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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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static int ata_init_legacy_host(struct ata_host *host,
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unsigned int *legacy_mask, int *was_busy)
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{
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struct device *gdev = host->dev;
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struct ata_legacy_devres *legacy_dr;
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int i, rc;
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if (!devres_open_group(gdev, NULL, GFP_KERNEL))
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return -ENOMEM;
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rc = -ENOMEM;
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legacy_dr = devres_alloc(ata_legacy_release, sizeof(*legacy_dr),
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GFP_KERNEL);
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if (!legacy_dr)
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goto err_out;
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devres_add(gdev, legacy_dr);
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for (i = 0; i < 2; i++) {
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*legacy_mask &= ~(1 << i);
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rc = ata_init_legacy_port(host->ports[i], legacy_dr);
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if (rc == 0)
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legacy_dr->mask |= 1 << i;
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else if (rc == -EBUSY)
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(*was_busy)++;
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}
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if (!legacy_dr->mask)
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return -EBUSY;
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for (i = 0; i < 2; i++)
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if (!(legacy_dr->mask & (1 << i)))
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host->ports[i]->ops = &ata_dummy_port_ops;
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*legacy_mask |= legacy_dr->mask;
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devres_remove_group(gdev, NULL);
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return 0;
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err_out:
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devres_release_group(gdev, NULL);
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return rc;
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}
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/**
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* ata_request_legacy_irqs - request legacy ATA IRQs
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* @host: target ATA host
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* @handler: array of IRQ handlers
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* @irq_flags: array of IRQ flags
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* @dev_id: array of IRQ dev_ids
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*
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* Request legacy IRQs for non-dummy legacy ports in @host. All
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* IRQ parameters are passed as array to allow ports to have
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* separate IRQ handlers.
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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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static int ata_request_legacy_irqs(struct ata_host *host,
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irq_handler_t const *handler,
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const unsigned int *irq_flags,
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void * const *dev_id)
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{
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struct device *gdev = host->dev;
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struct ata_legacy_devres *legacy_dr;
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int i, rc;
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legacy_dr = devres_find(host->dev, ata_legacy_release, NULL, NULL);
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BUG_ON(!legacy_dr);
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for (i = 0; i < 2; i++) {
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unsigned int irq;
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/* FIXME: ATA_*_IRQ() should take generic device not pci_dev */
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if (i == 0)
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irq = ATA_PRIMARY_IRQ(to_pci_dev(gdev));
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else
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irq = ATA_SECONDARY_IRQ(to_pci_dev(gdev));
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if (!(legacy_dr->mask & (1 << i)))
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continue;
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if (!handler[i]) {
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dev_printk(KERN_ERR, gdev,
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"NULL handler specified for port %d\n", i);
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rc = -EINVAL;
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goto err_out;
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}
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rc = request_irq(irq, handler[i], irq_flags[i], DRV_NAME,
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dev_id[i]);
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if (rc) {
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dev_printk(KERN_ERR, gdev,
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"irq %u request failed (errno=%d)\n", irq, rc);
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goto err_out;
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}
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/* record irq allocation in legacy_dr */
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legacy_dr->irq[i] = irq;
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legacy_dr->irq_dev_id[i] = dev_id[i];
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/* only used to print info */
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if (i == 0)
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host->irq = irq;
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else
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host->irq2 = irq;
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}
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return 0;
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err_out:
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ata_legacy_free_irqs(legacy_dr);
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return rc;
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}
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/**
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* ata_pci_init_one - Initialize/register PCI IDE host controller
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@ -727,7 +918,8 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
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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_port_info *port[2];
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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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unsigned int legacy_mode = 0;
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int rc;
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@ -783,66 +975,74 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
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pcim_pin_device(pdev);
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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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pci_set_master(pdev);
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} else {
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/* Deal with combined mode hack. This side of the logic all
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goes away once the combined mode hack is killed in 2.6.21 */
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if (!devm_request_region(dev, ATA_PRIMARY_CMD, 8, "libata")) {
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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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printk(KERN_WARNING "ata: 0x%0X IDE port busy\n",
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ATA_PRIMARY_CMD);
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} else
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legacy_mode |= ATA_PORT_PRIMARY;
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if (rc)
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goto err_out;
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if (!devm_request_region(dev, ATA_SECONDARY_CMD, 8, "libata")) {
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pcim_pin_device(pdev);
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printk(KERN_WARNING "ata: 0x%X IDE port busy\n",
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ATA_SECONDARY_CMD);
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} else
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legacy_mode |= ATA_PORT_SECONDARY;
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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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if (legacy_mode & ATA_PORT_PRIMARY)
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pci_request_region(pdev, 1, DRV_NAME);
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if (legacy_mode & ATA_PORT_SECONDARY)
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pci_request_region(pdev, 3, DRV_NAME);
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/* If there is a DMA resource, allocate it */
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pci_request_region(pdev, 4, 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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/* we have legacy mode, but all ports are unavailable */
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if (legacy_mode == (1 << 3)) {
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rc = -EBUSY;
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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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probe_ent = ata_pci_init_legacy_port(pdev, port, legacy_mode);
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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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if (rc)
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goto err_out;
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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, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
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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, port, ATA_PORT_PRIMARY);
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}
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if (!probe_ent) {
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||||
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;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user