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[libata ahci] support PCI MSI interrupt vector

This commit is contained in:
Jeff Garzik 2005-05-12 15:03:42 -04:00
parent 88d7bd8cb9
commit 907f4678c1
1 changed files with 63 additions and 10 deletions
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73
drivers/scsi/ahci.c
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@ -152,6 +152,7 @@ struct ahci_sg {
struct ahci_host_priv {
unsigned long flags;
unsigned int have_msi; /* is PCI MSI enabled? */
u32 cap; /* cache of HOST_CAP register */
u32 port_map; /* cache of HOST_PORTS_IMPL reg */
};
@ -182,6 +183,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc);
static u8 ahci_check_status(struct ata_port *ap);
static u8 ahci_check_err(struct ata_port *ap);
static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
static void ahci_remove_one (struct pci_dev *pdev);
static Scsi_Host_Template ahci_sht = {
.module = THIS_MODULE,
@ -271,7 +273,7 @@ static struct pci_driver ahci_pci_driver = {
.name = DRV_NAME,
.id_table = ahci_pci_tbl,
.probe = ahci_init_one,
.remove = ata_pci_remove_one,
.remove = ahci_remove_one,
};
@ -876,15 +878,19 @@ static int ahci_host_init(struct ata_probe_ent *probe_ent)
}
/* move to PCI layer, integrate w/ MSI stuff */
static void pci_enable_intx(struct pci_dev *pdev)
static void pci_intx(struct pci_dev *pdev, int enable)
{
u16 pci_command;
u16 pci_command, new;
pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
if (pci_command & PCI_COMMAND_INTX_DISABLE) {
pci_command &= ~PCI_COMMAND_INTX_DISABLE;
if (enable)
new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
else
new = pci_command | PCI_COMMAND_INTX_DISABLE;
if (new != pci_command)
pci_write_config_word(pdev, PCI_COMMAND, pci_command);
}
}
static void ahci_print_info(struct ata_probe_ent *probe_ent)
@ -966,7 +972,7 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
unsigned long base;
void *mmio_base;
unsigned int board_idx = (unsigned int) ent->driver_data;
int pci_dev_busy = 0;
int have_msi, pci_dev_busy = 0;
int rc;
VPRINTK("ENTER\n");
@ -984,12 +990,17 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_out;
}
pci_enable_intx(pdev);
if (pci_enable_msi(pdev) == 0)
have_msi = 1;
else {
pci_intx(pdev, 1);
have_msi = 0;
}
probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
if (probe_ent == NULL) {
rc = -ENOMEM;
goto err_out_regions;
goto err_out_msi;
}
memset(probe_ent, 0, sizeof(*probe_ent));
@ -1022,6 +1033,8 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
probe_ent->mmio_base = mmio_base;
probe_ent->private_data = hpriv;
hpriv->have_msi = have_msi;
/* initialize adapter */
rc = ahci_host_init(probe_ent);
if (rc)
@ -1041,7 +1054,11 @@ err_out_iounmap:
iounmap(mmio_base);
err_out_free_ent:
kfree(probe_ent);
err_out_regions:
err_out_msi:
if (have_msi)
pci_disable_msi(pdev);
else
pci_intx(pdev, 0);
pci_release_regions(pdev);
err_out:
if (!pci_dev_busy)
@ -1049,6 +1066,42 @@ err_out:
return rc;
}
static void ahci_remove_one (struct pci_dev *pdev)
{
struct device *dev = pci_dev_to_dev(pdev);
struct ata_host_set *host_set = dev_get_drvdata(dev);
struct ahci_host_priv *hpriv = host_set->private_data;
struct ata_port *ap;
unsigned int i;
int have_msi;
for (i = 0; i < host_set->n_ports; i++) {
ap = host_set->ports[i];
scsi_remove_host(ap->host);
}
have_msi = hpriv->have_msi;
free_irq(host_set->irq, host_set);
host_set->ops->host_stop(host_set);
iounmap(host_set->mmio_base);
for (i = 0; i < host_set->n_ports; i++) {
ap = host_set->ports[i];
ata_scsi_release(ap->host);
scsi_host_put(ap->host);
}
if (have_msi)
pci_disable_msi(pdev);
else
pci_intx(pdev, 0);
pci_release_regions(pdev);
kfree(host_set);
pci_disable_device(pdev);
dev_set_drvdata(dev, NULL);
}
static int __init ahci_init(void)
{