[libata] sata_vsc: support PCI MSI
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index 0fa1b89..1a5f357 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -94,8 +94,14 @@
VSC_SATA_INT_ERROR_P | VSC_SATA_INT_ERROR_R | \
VSC_SATA_INT_ERROR_E | VSC_SATA_INT_ERROR_M | \
VSC_SATA_INT_PHY_CHANGE),
+
+ /* Host private flags (hp_flags) */
+ VSC_SATA_HP_FLAG_MSI = (1 << 0),
};
+struct vsc_sata_host_priv {
+ u32 hp_flags;
+};
#define is_vsc_sata_int_err(port_idx, int_status) \
(int_status & (VSC_SATA_INT_ERROR << (8 * port_idx)))
@@ -118,6 +124,20 @@
}
+static void vsc_sata_host_stop(struct ata_host_set *host_set)
+{
+ struct vsc_sata_host_priv *hpriv = host_set->private_data;
+ struct pci_dev *pdev = to_pci_dev(host_set->dev);
+
+ if (hpriv->hp_flags & VSC_SATA_HP_FLAG_MSI)
+ pci_disable_msi(pdev);
+ else
+ pci_intx(pdev, 0);
+ kfree (hpriv);
+ ata_pci_host_stop(host_set);
+}
+
+
static void vsc_intr_mask_update(struct ata_port *ap, u8 ctl)
{
void __iomem *mask_addr;
@@ -312,7 +332,7 @@
.scr_write = vsc_sata_scr_write,
.port_start = ata_port_start,
.port_stop = ata_port_stop,
- .host_stop = ata_pci_host_stop,
+ .host_stop = vsc_sata_host_stop,
};
static void __devinit vsc_sata_setup_port(struct ata_ioports *port, unsigned long base)
@@ -341,6 +361,7 @@
{
static int printed_version;
struct ata_probe_ent *probe_ent = NULL;
+ struct vsc_sata_host_priv *hpriv;
unsigned long base;
int pci_dev_busy = 0;
void __iomem *mmio_base;
@@ -382,6 +403,7 @@
rc = -ENOMEM;
goto err_out_regions;
}
+
memset(probe_ent, 0, sizeof(*probe_ent));
probe_ent->dev = pci_dev_to_dev(pdev);
INIT_LIST_HEAD(&probe_ent->node);
@@ -393,19 +415,33 @@
}
base = (unsigned long) mmio_base;
+ hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
+ if (!hpriv) {
+ rc = -ENOMEM;
+ goto err_out_iounmap;
+ }
+ memset(hpriv, 0, sizeof(*hpriv));
+
/*
* Due to a bug in the chip, the default cache line size can't be used
*/
pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 0x80);
+ if (pci_enable_msi(pdev) == 0) {
+ hpriv->hp_flags |= VSC_SATA_HP_FLAG_MSI;
+ pci_intx(pdev, 0);
+ }
+ else
+ probe_ent->irq_flags = IRQF_SHARED;
+
probe_ent->sht = &vsc_sata_sht;
probe_ent->port_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO;
probe_ent->port_ops = &vsc_sata_ops;
probe_ent->n_ports = 4;
probe_ent->irq = pdev->irq;
- probe_ent->irq_flags = IRQF_SHARED;
probe_ent->mmio_base = mmio_base;
+ probe_ent->private_data = hpriv;
/* We don't care much about the PIO/UDMA masks, but the core won't like us
* if we don't fill these
@@ -432,10 +468,12 @@
/* FIXME: check ata_device_add return value */
ata_device_add(probe_ent);
- kfree(probe_ent);
+ kfree(probe_ent);
return 0;
+err_out_iounmap:
+ pci_iounmap(pdev, mmio_base);
err_out_free_ent:
kfree(probe_ent);
err_out_regions: