[libata ahci] support PCI MSI interrupt vector
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88d7bd8cb9
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@ -152,6 +152,7 @@ struct ahci_sg {
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struct ahci_host_priv {
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unsigned long flags;
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unsigned int have_msi; /* is PCI MSI enabled? */
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u32 cap; /* cache of HOST_CAP register */
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u32 port_map; /* cache of HOST_PORTS_IMPL reg */
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};
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@ -182,6 +183,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc);
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static u8 ahci_check_status(struct ata_port *ap);
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static u8 ahci_check_err(struct ata_port *ap);
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static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
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static void ahci_remove_one (struct pci_dev *pdev);
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static Scsi_Host_Template ahci_sht = {
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.module = THIS_MODULE,
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@ -271,7 +273,7 @@ static struct pci_driver ahci_pci_driver = {
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.name = DRV_NAME,
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.id_table = ahci_pci_tbl,
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.probe = ahci_init_one,
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.remove = ata_pci_remove_one,
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.remove = ahci_remove_one,
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};
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@ -876,15 +878,19 @@ static int ahci_host_init(struct ata_probe_ent *probe_ent)
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}
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/* move to PCI layer, integrate w/ MSI stuff */
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static void pci_enable_intx(struct pci_dev *pdev)
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static void pci_intx(struct pci_dev *pdev, int enable)
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{
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u16 pci_command;
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u16 pci_command, new;
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pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
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if (pci_command & PCI_COMMAND_INTX_DISABLE) {
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pci_command &= ~PCI_COMMAND_INTX_DISABLE;
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if (enable)
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new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
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else
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new = pci_command | PCI_COMMAND_INTX_DISABLE;
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if (new != pci_command)
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pci_write_config_word(pdev, PCI_COMMAND, pci_command);
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}
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}
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static void ahci_print_info(struct ata_probe_ent *probe_ent)
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@ -966,7 +972,7 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
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unsigned long base;
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void *mmio_base;
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unsigned int board_idx = (unsigned int) ent->driver_data;
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int pci_dev_busy = 0;
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int have_msi, pci_dev_busy = 0;
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int rc;
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VPRINTK("ENTER\n");
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@ -984,12 +990,17 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
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goto err_out;
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}
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pci_enable_intx(pdev);
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if (pci_enable_msi(pdev) == 0)
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have_msi = 1;
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else {
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pci_intx(pdev, 1);
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have_msi = 0;
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}
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probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
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if (probe_ent == NULL) {
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rc = -ENOMEM;
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goto err_out_regions;
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goto err_out_msi;
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}
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memset(probe_ent, 0, sizeof(*probe_ent));
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@ -1022,6 +1033,8 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
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probe_ent->mmio_base = mmio_base;
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probe_ent->private_data = hpriv;
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hpriv->have_msi = have_msi;
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/* initialize adapter */
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rc = ahci_host_init(probe_ent);
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if (rc)
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@ -1041,7 +1054,11 @@ err_out_iounmap:
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iounmap(mmio_base);
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err_out_free_ent:
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kfree(probe_ent);
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err_out_regions:
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err_out_msi:
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if (have_msi)
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pci_disable_msi(pdev);
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else
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pci_intx(pdev, 0);
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pci_release_regions(pdev);
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err_out:
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if (!pci_dev_busy)
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@ -1049,6 +1066,42 @@ err_out:
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return rc;
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}
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static void ahci_remove_one (struct pci_dev *pdev)
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{
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struct device *dev = pci_dev_to_dev(pdev);
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struct ata_host_set *host_set = dev_get_drvdata(dev);
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struct ahci_host_priv *hpriv = host_set->private_data;
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struct ata_port *ap;
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unsigned int i;
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int have_msi;
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for (i = 0; i < host_set->n_ports; i++) {
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ap = host_set->ports[i];
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scsi_remove_host(ap->host);
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}
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have_msi = hpriv->have_msi;
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free_irq(host_set->irq, host_set);
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host_set->ops->host_stop(host_set);
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iounmap(host_set->mmio_base);
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for (i = 0; i < host_set->n_ports; i++) {
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ap = host_set->ports[i];
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ata_scsi_release(ap->host);
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scsi_host_put(ap->host);
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}
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if (have_msi)
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pci_disable_msi(pdev);
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else
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pci_intx(pdev, 0);
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pci_release_regions(pdev);
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kfree(host_set);
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pci_disable_device(pdev);
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dev_set_drvdata(dev, NULL);
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}
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static int __init ahci_init(void)
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{
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